Initial checkin. There's a lot of work that needs to be done to make this more open-source friendly, especially on Windows. The README has notes on the known shortcomings and what should be coming soon.

.gitignore

@@ -16,17 +16,15 @@
 *.dylib
 *.dll
 
-# Fortran module files
-*.mod
-*.smod
-
 # Compiled Static libraries
 *.lai
 *.la
 *.a
 *.lib
 
-# Executables
-*.exe
-*.out
-*.app
+*.VC.*
+/build
+/src/.vs/*
+/src/steamnetworkingsockets/Messageswin64Debug/*
+/src/steamnetworkingsockets/certtool/win64/*
+/src/steamnetworkingsockets/clientlib/win64/*

README.md

@@ -4,11 +4,11 @@ GameNetworkingSockets
 GameNetworkingSockets is a basic transport layer for games.  The features are:
 
 * Connection-oriented protocol (like TCP)
-* ... but message-oriented instead of stream-oriented.
+* ... but message-oriented instead of stream-oriented
 * Mix of reliable and unreliable messages
 * Messages can be larger than underlying MTU, the protocol performs fragmentation and reassembly, and retransmission for reliable
-* Bandwidth estimation based on TFP-friendly rate control (RFC 5348)
-* Encryption.
+* Bandwidth estimation based on TCP-friendly rate control (RFC 5348)
+* Encryption
 * Tools for simulating loss and detailed stats measurement
 
 The main interface class is named SteamNetworkingSockets, and many files have "steam" in their name.
@@ -16,6 +16,42 @@ But *Steam is not needed*.  The reason for the name is that this provides a subs
 
 But even if you don't make games or aren't on Steam, feel free to use this code for whatever purpose you want.
 
-### Coming soon
+## Building
 
-Sorry, we're still in the process of taking the code from the SteamNetworkingSockets library and making it ready to be open-sourced.  Watch this space.
+### Dependencies
+
+* OpenSSL
+* Google protobuf
+* ujson.  A small JSON parser, with DOM storage using STL.  The project seems to have been abandoned, as our pull requests have been ignored.  The code is included in this project, with some of our own fixes and changes.
+* ed25519-donna and curve25519-donna.  We've made some minor changes, so the source is included in this project.
+
+### Linux
+
+This has only really been tested on Ubuntu 17.
+
+```
+meson build src
+```
+
+### Work in progress!
+
+We're still in the process of extracting the code from our proprietary build toolchain and making everything more open-source friendly.  Bear with us.
+
+* The code in this form is only known to compile on Ubuntu 17.  (Although this code has shipped through or toolchain on Win32/Win64 and OSX as well and also compiles for several Android flavors).
+* We don't provide any Windows project files or any straightforward method for building on windows yet.
+* There is a unit test, but it's not currently included and we don't have it working in any standard framework.
+
+## Roadmap
+Here are some areas where we're working on improvement
+
+### Reliability layer improvements
+We have a new version of the "SNP" code in progress.  (This is the code that takes API messages and puts them into UDP packets.  Long packets are fragmented and reassembled, short messages can be combined, and lost fragments of reliable messages are retransmitted.)
+* The wire format framing is rather....prodigious.
+* The reliability layer is a pretty naive sliding window implementation.
+* The reassembly layer is likewise pretty naive.  Out-of-order packets are totally discarded, which can be catastrophic for certain patterns of traffic over, e.g. DSL lines.
+
+### Abstract SteamIDs to generic "identity"
+We'd like to generalize the concept of an identity.  Basically anywhere you see CSteamID, it would be good to enable the use of a more generic identity structure.
+
+### OpenSSL bloat
+Our use of OpenSLL is extremely limited; basically just AES encryption.  We use Ed25519 keys for signatures and key exchange and we do not support X.509 certificates.  However, because the code is going through a wrapper layer that is part of Steam, we are linking in much more code than strictly necessary.  And each time we encrypt and decrypt a packet, this wrapper layer is doing some work which could be avoided.

src/GameNetworkingSockets.sln

@@ -0,0 +1,40 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "steamnetworkingsockets", "steamnetworkingsockets\clientlib\steamnetworkingsockets_win64.vcxproj", "{66CEE842-E0AC-EA65-DE7B-7E22DC21EC3D}"
+	ProjectSection(ProjectDependencies) = postProject
+		{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD} = {E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "steamnetworkingsockets_messages", "steamnetworkingsockets\steamnetworkingsockets_messages_win64.vcxproj", "{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "steamnetworkingsockets_certtool", "steamnetworkingsockets\certtool\steamnetworkingsockets_certtool_win64.vcxproj", "{C31B11F7-9921-F168-3A99-169A6BB5B7C2}"
+	ProjectSection(ProjectDependencies) = postProject
+		{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD} = {E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Release|x64 = Release|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{66CEE842-E0AC-EA65-DE7B-7E22DC21EC3D}.Debug|x64.ActiveCfg = Debug|x64
+		{66CEE842-E0AC-EA65-DE7B-7E22DC21EC3D}.Debug|x64.Build.0 = Debug|x64
+		{66CEE842-E0AC-EA65-DE7B-7E22DC21EC3D}.Release|x64.ActiveCfg = Release|x64
+		{66CEE842-E0AC-EA65-DE7B-7E22DC21EC3D}.Release|x64.Build.0 = Release|x64
+		{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}.Debug|x64.ActiveCfg = Debug|x64
+		{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}.Debug|x64.Build.0 = Debug|x64
+		{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}.Release|x64.ActiveCfg = Release|x64
+		{E9E3C384-69D7-4FFA-7BD6-47DDAB5C34CD}.Release|x64.Build.0 = Release|x64
+		{C31B11F7-9921-F168-3A99-169A6BB5B7C2}.Debug|x64.ActiveCfg = Debug|x64
+		{C31B11F7-9921-F168-3A99-169A6BB5B7C2}.Debug|x64.Build.0 = Debug|x64
+		{C31B11F7-9921-F168-3A99-169A6BB5B7C2}.Release|x64.ActiveCfg = Release|x64
+		{C31B11F7-9921-F168-3A99-169A6BB5B7C2}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

src/common/crypto.h

@@ -0,0 +1,380 @@
+//========= Copyright Valve LLC, All rights reserved. =========================
+
+#ifndef CRYPTO_H
+#define CRYPTO_H
+
+#include <tier0/dbg.h>		// for Assert & AssertMsg
+//#include "tier1/passwordhash.h"
+#include "keypair.h"
+#include "steam/steamtypes.h" // Salt_t
+#include "crypto_constants.h"
+
+const unsigned int k_cubMD5Hash = 16;
+typedef	unsigned char MD5Digest_t[k_cubMD5Hash];
+
+const unsigned int k_cubSHA256Hash = 32;
+typedef	unsigned char SHA256Digest_t[ k_cubSHA256Hash ];
+
+const unsigned int k_cubCryptoSignature = 64;
+typedef unsigned char CryptoSignature_t[ k_cubCryptoSignature ];
+
+const unsigned int k_cubSHA1Hash = 20;
+typedef	uint8 SHADigest_t[ k_cubSHA1Hash ];
+
+class CCrypto
+{
+public:
+
+	enum ECDSACurve {
+		k_ECDSACurve_secp256k1,
+		k_ECDSACurve_secp256r1,
+	};
+	
+	static uint32 GetSymmetricEncryptedSize( uint32 cubPlaintextData );
+
+	// Standard AES (128- or 256-bit), PKCS#7 padding, random IV is encrypted then prepended.
+	// Output is always 17-32 bytes longer than input, filling up to a multiple of 16.
+	static bool SymmetricEncrypt( const uint8 * pubPlaintextData, uint32 cubPlaintextData, 
+								  uint8 * pubEncryptedData, uint32 * pcubEncryptedData,
+								  const uint8 * pubKey, uint32 cubKey );
+
+	// SymmetricEncryptChosenIV is compatible with SymmetricEncrypt, but uses a specifically
+	// chosen initialization vector instead of a randomly generated one. GENERALLY NOT RECOMMENDED.
+	static bool SymmetricEncryptChosenIV( const uint8 * pubPlaintextData, uint32 cubPlaintextData,
+										  const uint8 * pIV, uint32 cubIV,
+										  uint8 * pubEncryptedData, uint32 * pcubEncryptedData,
+										  const uint8 * pubKey, uint32 cubKey );
+
+	// SymmetricEncryptWithIV is NOT compatible with SymmetricDecrypt, because it does not write
+	// the IV into the data stream - it is assumed that the IV is communicated or agreed upon by
+	// some other out-of-band method. Pair it with SymmetricDecryptWithIV to decrpyt. Output is
+	// always 1-16 bytes longer than input due to PKCS#7 block padding.
+	static bool SymmetricEncryptWithIV( const uint8 * pubPlaintextData, uint32 cubPlaintextData,
+										const uint8 * pIV, uint32 cubIV,
+										uint8 * pubEncryptedData, uint32 * pcubEncryptedData,
+										const uint8 * pubKey, uint32 cubKey );
+
+	static bool SymmetricDecrypt( const uint8 * pubEncryptedData, uint32 cubEncryptedData, 
+								  uint8 * pubPlaintextData, uint32 * pcubPlaintextData,
+								  const uint8 * pubKey, uint32 cubKey );
+
+	static bool SymmetricDecryptRecoverIV( const uint8 * pubEncryptedData, uint32 cubEncryptedData,
+		uint8 * pubPlaintextData, uint32 * pcubPlaintextData, uint8 *pIV, uint32 cubIV,
+		const uint8 * pubKey, uint32 cubKey, bool bVerifyPaddingBytes = true );
+
+	
+	// SymmetricDecryptWithIV assumes that the encrypted data does not begin with an IV.
+	// If you created the encrypted data with SymmetricEncryptChosenIV, you must discard
+	// the first 16 bytes of encrypted output before passing it to SymmetricDecryptWithIV.
+	static bool SymmetricDecryptWithIV( const uint8 * pubEncryptedData, uint32 cubEncryptedData, 
+										const uint8 * pIV, uint32 cubIV,
+										uint8 * pubPlaintextData, uint32 * pcubPlaintextData,
+										const uint8 * pubKey, uint32 cubKey, bool bVerifyPaddingBytes = true );
+	
+	//
+	// Secure key exchange (curve25519 elliptic-curve Diffie-Hellman key exchange)
+	//
+	static void GenerateKeyExchangeKeyPair( CECKeyExchangePublicKey *pPublicKey, CECKeyExchangePrivateKey *pPrivateKey );
+	static void PerformKeyExchange( const CECKeyExchangePrivateKey &localPrivateKey, const CECKeyExchangePublicKey &remotePublicKey, SHA256Digest_t *pSharedSecretOut );
+
+	//
+	// Signing and verification (ed25519 elliptic-curve signature scheme)
+	//
+	static void GenerateSigningKeyPair( CECSigningPublicKey *pPublicKey, CECSigningPrivateKey *pPrivateKey );
+	static void GenerateSignature( const uint8 *pubData, uint32 cubData, const CECSigningPrivateKey &privateKey, CryptoSignature_t *pSignatureOut );
+	static bool VerifySignature( const uint8 *pubData, uint32 cubData, const CECSigningPublicKey &publicKey, const CryptoSignature_t &signature );
+
+
+	static bool RSAGenerateKeys( uint32 cKeyBits, CRSAPublicKey &rsaKeyPublic, CRSAPrivateKey &rsaKeyPrivate );
+
+	//
+	// RSA encryption of small data blocks - usable for authenticated key exchange
+	// (deprecated, prefer key exchange followed by AES-GCM or similar authenticated encryption)
+	//
+	static uint32 GetRSAMaxPlaintextSize( const CRSAPublicKey &rsaKey );
+	static uint32 GetRSAEncryptionBlockSize( const CRSAPublicKey &rsaKey );
+	static bool RSAEncrypt( const uint8 *pubPlaintextPlaintextData, const uint32 cubData, uint8 *pubEncryptedData, 
+		uint32 *pcubEncryptedData, const CRSAPublicKey &rsaKey );
+	static bool RSADecrypt( const uint8 *pubEncryptedData, uint32 cubEncryptedData, 
+		uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const CRSAPrivateKey &rsaKey );
+	// decrypt a payload which was encrypted using PCKS #1 v1.5 padding instead of OAEP 
+	static bool RSADecryptPKCSv15( const uint8 *pubEncryptedData, uint32 cubEncryptedData,
+		uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const CRSAPrivateKey &rsaKey );
+	// decrypt using a public key, and no padding. DO NOT USE. only kept for compatibility with old systems.
+	static bool RSAPublicDecrypt_NoPadding_DEPRECATED( const uint8 *pubEncryptedData, uint32 cubEncryptedData, 
+		uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const CRSAPrivateKey &rsaKey );
+
+	//
+	// Signing and verification (RSA signatures - slower, larger, old-school)
+	//
+	static uint32 GetRSASignatureSize( const CRSAPrivateKey &rsaKey );
+	static uint32 GetRSASignatureSize( const CRSAPublicKey &rsaKey );
+	static bool RSASign( const uint8 *pubData, const uint32 cubData, 
+		uint8 *pubSignature, uint32 *pcubSignature, 
+		const CRSAPrivateKey &rsaKey );
+	static bool RSAVerifySignature( const uint8 *pubData, const uint32 cubData, 
+		const uint8 *pubSignature, const uint32 cubSignature,
+		const CRSAPublicKey &rsaKey );
+	static bool RSASignSHA256(	const uint8 *pubData, const uint32 cubData, 
+		uint8 *pubSignature, uint32 *pcubSignature, 
+		const CRSAPrivateKey &rsaKey );
+	static bool RSAVerifySignatureSHA256(	const uint8 *pubData, const uint32 cubData, 
+		const uint8 *pubSignature, const uint32 cubSignature, 
+		const CRSAPublicKey &rsaKey );
+
+#ifdef _SERVER
+	//
+	// Signing and verification (ECDSA signatures)
+	//
+	static bool ECDSASign( const uint8 *pubData, const uint32 cubData,
+		uint8 *pubSignature, uint32 *pcubSignature,
+		const uint8 * pubPrivateKey, const uint32 cubPrivateKey, ECDSACurve eCurve = k_ECDSACurve_secp256k1 );
+	static bool ECDSAVerifySignature( const uint8 *pubData, const uint32 cubData,
+		const uint8 *pubSignature, const uint32 cubSignature,
+		const uint8 *pubPublicKey, const uint32 cubPublicKey, ECDSACurve eCurve = k_ECDSACurve_secp256k1 );
+	static bool ECDSASignSHA256( const uint8 *pubData, const uint32 cubData,
+		uint8 *pubSignature, uint32 *pcubSignature,
+		const uint8 * pubPrivateKey, const uint32 cubPrivateKey, ECDSACurve eCurve = k_ECDSACurve_secp256k1 );
+	static bool ECDSAVerifySignatureSHA256( const uint8 *pubData, const uint32 cubData,
+		const uint8 *pubSignature, const uint32 cubSignature,
+		const uint8 *pubPublicKey, const uint32 cubPublicKey, ECDSACurve eCurve = k_ECDSACurve_secp256k1 );
+#endif
+
+	//
+	// These are deprecated because they are not secure enough.
+	//	1.	the key-derivation function (SHA256 single round) is fast, meaning easy to brute-force
+	//		for low-entropy passwords
+	//  2.	including the full HMAC actually makes it easier to brute-force, because you just
+	//		attack the HMAC and get a definitive "yes" when you use the right key.
+	//		A truncated MAC (eg just one or two bytes) would still provide relatively good
+	//		typo protection, and would make the list of possible passphrases much larger.
+	//		However, then they just have to run the AES decryption once for each of those and
+	//		pick the results that look most likely to be the plaintext.
+	//	So, don't use these.
+	static bool EncryptWithPasswordAndHMAC_DEPRECATED( const uint8 *pubPlaintextData, uint32 cubPlaintextData,
+									 uint8 * pubEncryptedData, uint32 * pcubEncryptedData,
+									 const char *pchPassword );
+
+	static bool EncryptWithPasswordAndHMACWithIV_DEPRECATED( const uint8 *pubPlaintextData, uint32 cubPlaintextData,
+											const uint8 * pIV, uint32 cubIV,
+											uint8 * pubEncryptedData, uint32 * pcubEncryptedData,
+											const char *pchPassword );
+
+
+	static bool DecryptWithPasswordAndAuthenticate_DEPRECATED( const uint8 * pubEncryptedData, uint32 cubEncryptedData, 
+									 uint8 * pubPlaintextData, uint32 * pcubPlaintextData,
+									 const char *pchPassword );
+
+	// EncryptWithPassphrase / DecryptWithPassphrase uses the following format:
+	//  <1 byte algorithm ID> <1 byte parameter> <16 bytes random IV> <AES-256 CBC of data> <HMAC-SHA256 of all preceding bytes>
+	//
+	// The resulting size is always ( 16*n + 2 ), which helps distinguish it from plain AES-256 CBC.
+	//
+	// Let "intermediate secret" be HashAlgorithm( passphrase, parameter, random IV ):
+	//   key for AES-256 CBC is HMAC-SHA256( key = intermediate secret, signed data = 4 bytes "AES\x01" )
+	//   key for HMAC-SHA256 is HMAC-SHA256( key = intermediate secret, signed data = 4 bytes "HMAC" )
+	//
+	// The defined password hashing algorithm are currently
+	//   0x01 = PBKDF2( HMAC-SHA256, rounds = 2^(parameter byte) ) 
+	//   0x02 = scrypt-jane( HMAC-SHA256, Salsa20/8, params=16/4/0 ) with parameter byte always 0x00
+	//
+	// Note that EncryptWithPassphrase_Strong is designed to be very slow! Possibly even 2+ seconds.
+	// Each decryption attempt to will take exactly as long as encryption, which is the whole point.
+	// For things which need to be encrypted and decrypted rapidly, use EncryptWithPassphrase_Fast
+	// but be aware that this *dramatically* reduces the expense of cracking the PBKDF2 passphrase.
+	// (The Fast variant is still in line with good practices for password hashing as of early 2016.)
+	//
+	// A stronger passphrase is always the best defense against offline cracking. Any algorithm can
+	// only be a fixed work multiplier, compared to the exponential increase of a longer passphrase.
+	//
+	static bool EncryptWithPassphrase_Strong( const uint8 *pubPlaintextData, uint32 cubPlaintextData, uint8 * pubEncryptedData, uint32 * pcubEncryptedData, const char *pchPassphrase, int nPassphraseLength = -1 );
+	static bool EncryptWithPassphrase_Fast( const uint8 *pubPlaintextData, uint32 cubPlaintextData, uint8 * pubEncryptedData, uint32 * pcubEncryptedData, const char *pchPassphrase, int nPassphraseLength = -1 );
+	static bool DecryptWithPassphrase( const uint8 *pubEncryptedData, uint32 cubEncryptedData, uint8 * pubPlaintextData, uint32 * pcubPlaintextData, const char *pchPassphrase, int nPassphraseLength = -1, bool bVerifyIntegrity = true );
+
+	// A variation of EncryptWithPassphrase_Strong with no CBC trailing padding and no integrity
+	// checks, since the decryption can be validated against the public key. Extremely compact;
+	// always 1 + 1 + 16 + 32 bytes = 50 bytes.
+	static bool EncryptECPrivateKeyWithPassphrase( const CEC25519PrivateKeyBase &privateKey, uint8 *pubEncryptedData, uint32 *pcubEncryptedData, const char *pchPassphrase, int nPassphraseLength = -1, bool bStrong = true );
+	static bool DecryptECPrivateKeyWithPassphrase( const uint8 *pubEncryptedData, uint32 cubEncryptedData, CEC25519PrivateKeyBase *pPrivateKey, const char *pchPassphrase, int nPassphraseLength = -1 );
+
+protected:
+	static bool RSAEncrypt( const uint8 *pubPlaintextData, const uint32 cubData, uint8 *pubEncryptedData, 
+							uint32 *pcubEncryptedData, const uint8 *pubPublicKey, const uint32 cubPublicKey );
+	static bool RSADecrypt( const uint8 *pubEncryptedData, uint32 cubEncryptedData, 
+							uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const uint8 *pubPrivateKey, const uint32 cubPrivateKey, bool bLegacyPKCSv15 );
+
+	// decrypt using a public key, and no padding
+	static bool RSAPublicDecrypt_NoPadding_DEPRECATED( const uint8 *pubEncryptedData, uint32 cubEncryptedData, 
+							uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const uint8 *pubPublicKey, const uint32 cubPublicKey );
+
+	static bool RSASign( const uint8 *pubData, const uint32 cubData, 
+						 uint8 *pubSignature, uint32 *pcubSignature, 
+						const uint8 * pubPrivateKey, const uint32 cubPrivateKey );
+	static bool RSAVerifySignature( const uint8 *pubData, const uint32 cubData, 
+									const uint8 *pubSignature, const uint32 cubSignature, 
+									const uint8 *pubPublicKey, const uint32 cubPublicKey );
+
+	static bool RSASignSHA256( const uint8 *pubData, const uint32 cubData, 
+						 uint8 *pubSignature, uint32 *pcubSignature, 
+						const uint8 * pubPrivateKey, const uint32 cubPrivateKey );
+	static bool RSAVerifySignatureSHA256( const uint8 *pubData, const uint32 cubData, 
+									const uint8 *pubSignature, const uint32 cubSignature, 
+									const uint8 *pubPublicKey, const uint32 cubPublicKey );
+
+	typedef bool (*PassphraseHelperFn_t)( uint8 ( &rgubDigest )[32], const char *pchPassphrase, int nPassphraseLength, const uint8 *pubSalt, uint32 cubSalt, uint8 ubAlgorithmID, uint8 ubParameter );
+	static bool PassphraseHelper_PBKDF2SHA256( uint8 ( &rgubDigest )[32], const char *pchPassphrase, int nPassphraseLength, const uint8 *pubSalt, uint32 cubSalt, uint8 ubAlgorithmID, uint8 ubParameter );
+	static bool PassphraseHelper_Scrypt( uint8 ( &rgubDigest )[32], const char *pchPassphrase, int nPassphraseLength, const uint8 *pubSalt, uint32 cubSalt, uint8 ubAlgorithmID, uint8 ubParameter );
+
+	static bool EncryptWithPassphraseImpl( const uint8 *pubPlaintextData, uint32 cubPlaintextData, uint8 * pubEncryptedData, uint32 * pcubEncryptedData, const char *pchPassphrase, int nPassphraseLength, bool bStrong );
+	static bool DecryptWithPassphraseImpl( const uint8 *pubEncryptedData, uint32 cubEncryptedData, uint8 * pubPlaintextData, uint32 * pcubPlaintextData, const char *pchPassphrase, int nPassphraseLength, bool bVerifyIntegrity );
+
+public:
+	static bool HexEncode( const uint8 *pubData, const uint32 cubData, char *pchEncodedData, uint32 cchEncodedData );
+	static bool HexDecode( const char *pchData, uint8 *pubDecodedData, uint32 *pcubDecodedData );
+
+	static uint32 Base64EncodeMaxOutput( uint32 cubData, const char *pszLineBreakOrNull );
+	static bool Base64Encode( const uint8 *pubData, uint32 cubData, char *pchEncodedData, uint32 cchEncodedData, bool bInsertLineBreaks = true ); // legacy, deprecated
+	static bool Base64Encode( const uint8 *pubData, uint32 cubData, char *pchEncodedData, uint32 *pcchEncodedData, const char *pszLineBreak = "\n" );
+
+	static uint32 Base64DecodeMaxOutput( uint32 cubData ) { return ( (cubData + 3 ) / 4) * 3 + 1; }
+	static bool Base64Decode( const char *pchEncodedData, uint8 *pubDecodedData, uint32 *pcubDecodedData, bool bIgnoreInvalidCharacters = true ); // legacy, deprecated
+	static bool Base64Decode( const char *pchEncodedData, uint32 cchEncodedData, uint8 *pubDecodedData, uint32 *pcubDecodedData, bool bIgnoreInvalidCharacters = true );
+
+	/// Parse a PEM-like thing, locating the hex-encoded body (but not parsing it.)
+	/// On success, will returns a pointer to the first character of the body,
+	/// and update *pcch to reflect its size.  You can then pass this
+	/// size to Base64DecodeMaxOutput and Base64Decode to get the actual data.
+	///
+	/// pszExpectedType is string you expect to find in the header and footer,
+	/// excluding the "BEGIN" and "END".  For example, you can pass "PRIVATE KEY"
+	/// to check that the header contains something like "-----BEGIN PRIVATE KEY-----"
+	/// and the header contains "-----END PRIVATE KEY-----".  If you pass NULL,
+	/// then we just check that the header and footer contain something vaguely PEM-like.
+	static const char *LocatePEMBody( const char *pchPEM, uint32 *pcch, const char *pszExpectedType );
+
+	static bool GenerateRandomBlock( void *pubDest, int cubDest );
+
+	static bool GenerateSalt( Salt_t *pSalt );
+	static bool GenerateSHA1Digest( const uint8 *pubInput, const int cubInput, SHADigest_t *pOutDigest );
+	static bool GenerateSHA256Digest( const uint8 *pubData, const int cubData, SHA256Digest_t *pOutputDigest );
+	static bool GenerateSaltedSHA1Digest( const char *pchInput, const Salt_t *pSalt, SHADigest_t *pOutDigest );
+	static bool GenerateStrongScryptDigest( const char *pchInput, int32 nInputLen, const uint8 *pubSalt, uint32 cubSalt, SHA256Digest_t *pDigestOut );
+	static bool GenerateFastScryptDigest( const char *pchInput, int32 nInputLen, const uint8 *pubSalt, uint32 cubSalt, SHA256Digest_t *pDigestOut );
+
+	// GenerateHMAC256 is our implementation of HMAC-SHA256. Relatively future-proof. You should probably use this unless you have a very good reason not to.
+	static bool GenerateHMAC256( const uint8 *pubData, uint32 cubData, const uint8 *pubKey, uint32 cubKey, SHA256Digest_t *pOutputDigest );
+
+	// GenerateHMAC is our implementation of HMAC-SHA1. The current standard, although people are moving to HMAC-SHA256.
+	static bool GenerateHMAC( const uint8 *pubData, uint32 cubData, const uint8 *pubKey, uint32 cubKey, SHADigest_t *pOutputDigest );
+
+	// GenerateHMACMD5 is HMAC-MD5, which is considered "outdated" although it's quite fast and there are no known or theorized attacks.
+	static bool GenerateHMACMD5( const uint8 *pubData, uint32 cubData, const uint8 *pubKey, uint32 cubKey, MD5Digest_t *pOutputDigest );
+
+//SDR_PUBLIC 	static bool BGeneratePasswordHash( const char *pchInput, EPasswordHashAlg hashType, const Salt_t &Salt, PasswordHash_t &OutPasswordHash );
+//SDR_PUBLIC 	static bool BValidatePasswordHash( const char *pchInput, EPasswordHashAlg hashType, const PasswordHash_t &DigestStored, const Salt_t &Salt, PasswordHash_t *pDigestComputed );
+//SDR_PUBLIC 	static bool BGeneratePBKDF2Hash( const char *pchInput, const Salt_t &Salt, unsigned int rounds, PasswordHash_t &OutPasswordHash );
+//SDR_PUBLIC 	static bool BGenerateWrappedSHA1PasswordHash( const char *pchInput, const Salt_t &Salt, unsigned int rounds, PasswordHash_t &OutPasswordHash );
+//SDR_PUBLIC 	static bool BUpgradeOrWrapPasswordHash( PasswordHash_t &InPasswordHash, EPasswordHashAlg hashTypeIn, const Salt_t &Salt, PasswordHash_t &OutPasswordHash, EPasswordHashAlg &hashTypeOut );
+
+
+#ifdef DBGFLAG_VALIDATE
+	static void ValidateStatics( CValidator &validator, const char *pchName );
+#endif
+};
+
+//
+// Inline a bunch of functions that consume RSA keys.
+//
+inline bool CCrypto::RSAEncrypt( const uint8 *pubPlaintextPlaintextData, const uint32 cubData, uint8 *pubEncryptedData, 
+	uint32 *pcubEncryptedData, const CRSAPublicKey &rsaKey )
+{
+	return RSAEncrypt( pubPlaintextPlaintextData, cubData, pubEncryptedData, pcubEncryptedData, rsaKey.GetData(), rsaKey.GetLength() );
+}
+
+inline bool CCrypto::RSADecrypt( const uint8 *pubEncryptedData, uint32 cubEncryptedData, 
+	uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const CRSAPrivateKey &rsaKey )
+{
+	return RSADecrypt( pubEncryptedData, cubEncryptedData, pubPlaintextData, pcubPlaintextData, rsaKey.GetData(), rsaKey.GetLength(), false );
+}
+
+inline bool CCrypto::RSADecryptPKCSv15( const uint8 *pubEncryptedData, uint32 cubEncryptedData,
+	uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const CRSAPrivateKey &rsaKey )
+{
+	return RSADecrypt( pubEncryptedData, cubEncryptedData, pubPlaintextData, pcubPlaintextData, rsaKey.GetData(), rsaKey.GetLength(), true );
+}
+
+inline bool CCrypto::RSAPublicDecrypt_NoPadding_DEPRECATED( const uint8 *pubEncryptedData, uint32 cubEncryptedData, 
+	uint8 *pubPlaintextData, uint32 *pcubPlaintextData, const CRSAPrivateKey &rsaKey )
+{
+	return RSAPublicDecrypt_NoPadding_DEPRECATED( pubEncryptedData, cubEncryptedData, pubPlaintextData, pcubPlaintextData, rsaKey.GetData(), rsaKey.GetLength() );
+}
+
+inline bool CCrypto::RSASign( const uint8 *pubData, const uint32 cubData, 
+	uint8 *pubSignature, uint32 *pcubSignature, 
+	const CRSAPrivateKey &rsaKey )
+{
+	return RSASign( pubData, cubData, pubSignature, pcubSignature, rsaKey.GetData(), rsaKey.GetLength() );
+}
+
+inline bool CCrypto::RSAVerifySignature( const uint8 *pubData, const uint32 cubData, 
+	const uint8 *pubSignature, const uint32 cubSignature,
+	const CRSAPublicKey &rsaKey )
+{
+	return RSAVerifySignature( pubData, cubData, pubSignature, cubSignature, rsaKey.GetData(), rsaKey.GetLength() );
+}
+
+inline bool CCrypto::RSASignSHA256( const uint8 *pubData, const uint32 cubData, 
+	uint8 *pubSignature, uint32 *pcubSignature, 
+	const CRSAPrivateKey &rsaKey )
+{
+	return RSASignSHA256( pubData, cubData, pubSignature, pcubSignature, rsaKey.GetData(), rsaKey.GetLength() );
+}
+
+inline bool CCrypto::RSAVerifySignatureSHA256(const uint8 *pubData, const uint32 cubData, 
+	const uint8 *pubSignature, const uint32 cubSignature, 
+	const CRSAPublicKey &rsaKey )
+{
+	return RSAVerifySignatureSHA256( pubData, cubData, pubSignature, cubSignature, rsaKey.GetData(), rsaKey.GetLength() );
+}
+
+
+
+//-----------------------------------------------------------------------------
+// Purpose: power-of-two radix conversion with translation table. Can be used
+//			for hex, octal, binary, base32, base64, etc. This is a class because
+//			the decoding is done via a generated reverse-lookup table.
+//-----------------------------------------------------------------------------
+class CCustomPow2RadixEncoder
+{
+public:
+	explicit CCustomPow2RadixEncoder( const char *pchEncodingTable );
+	bool EncodeBits( const uint8 *pubData, size_t cDataBits, char *pchEncodedData, size_t cchEncodedData ) const;
+	bool Encode( const uint8 *pubData, size_t cubData, char *pchEncodedData, size_t cchEncodedData ) const;
+	bool Decode( const char *pchData, uint8 *pubDecodedData, uint32 *pcubDecodedData, bool bIgnoreInvalidChars = true, bool bDropTrailingPartialByte = true ) const;
+	
+protected:
+	void Init( const uint8 *pubEncodingTable, uint32 cubEncodingTable );
+	size_t EncodeImpl( const uint8 *pubData, size_t cubData, uint cIgnoredTrailingBits, uint8 *pchEncodedData, size_t cchEncodedData, bool bAddTrailingNull ) const;
+	size_t DecodeImpl( const uint8 *pubData, size_t cubData, uint8 *pchDecodedData, size_t cchDecodedData, bool bIgnoreInvalidChars, bool bDropTrailingPartialByte ) const;
+
+	static size_t TranslateBits( const uint8 *pSrc, size_t cubSrc, uint cIgnoredTrailingBits, uint uLookupBitWidth, const uint8 *pLookupTable, uint uOutputPackBitWidth, uint8 *pDest, size_t cubDest, bool bIgnoreInvalidChars, bool bDropTrailingPartialByte );
+
+	uint m_uRadixBits;
+	uint m_chTerminator;
+	uint8 m_rgubEncodingTable[256];
+	uint8 m_rgubDecodingTable[256];
+};
+
+class CCustomHexEncoder : public CCustomPow2RadixEncoder
+{
+public:
+	explicit CCustomHexEncoder( const char *pchEncodeTable );
+};
+
+class CCustomBase32Encoder : public CCustomPow2RadixEncoder
+{
+public:
+	explicit CCustomBase32Encoder( const char *pchEncodeTable );
+};
+
+#endif // CRYPTO_H

src/common/crypto_constants.h

@@ -0,0 +1,26 @@
+//========= Copyright Valve LLC, All rights reserved. =========================
+
+#ifndef CRYPTO_CONSTANTS_H
+#define CRYPTO_CONSTANTS_H
+#pragma once
+
+const int k_nSymmetricBlockSize = 16;					// AES block size (128 bits)
+const int k_nSymmetricKeyLen = 32;						// length in bytes of keys used for symmetric encryption
+const int k_nSymmetricKeyLen128 = 16;					// 128 bits, in bytes
+const int k_nSymmetricKeyLen256 = 32;					// 256 bits, in bytes
+
+const int k_nRSAKeyLenMax = 1024;						// max length in bytes of keys used for RSA encryption (includes DER encoding)
+const int k_nRSAKeyLenMaxEncoded = k_nRSAKeyLenMax*2;	// max length in bytes of hex-encoded key (hex encoding exactly doubles size)
+const int k_nRSAKeyBits = 1024;							// length in bits of keys used for RSA encryption
+const int k_cubRSAEncryptedBlockSize	= 128;
+const int k_cubRSAPlaintextBlockSize	= 86 + 1;		// assume plaintext is text, so add a byte for the trailing \0
+const uint32 k_cubRSASignature = k_cubRSAEncryptedBlockSize;
+
+const int k_nAESKeyLenMax = k_nSymmetricKeyLen;
+const int k_nAESKeyLenMaxEncoded = k_nAESKeyLenMax*2; 
+const int k_nAESKeyBits = k_nSymmetricKeyLen*8;	// normal size of AES keys
+const int k_cchMaxPassphrase = 128;				// maximum size of a license passphrase
+
+const int k_nSHAHashStringLen = 40;				// length of SHA1 hash when stored as a hex string
+
+#endif // CRYPTO_CONSTANTS_H

src/common/keypair.h

@@ -0,0 +1,232 @@
+//========= Copyright Valve Corporation, All rights reserved. =========================
+
+#ifndef KEYPAIR_H
+#define KEYPAIR_H
+#pragma once
+
+#include "steam/steamuniverse.h"
+
+#include <stdint.h>
+#include "minbase/minbase_securezeromemory_impl.h"
+
+
+// Ed25519 / Curve25519 (http://ed25519.cr.yp.to/) are strongly preferred over
+// RSA and ECDSA due to performance benefits, minimization of side-channel
+// attack vectors, smaller signature length, simpler implementation, and more
+// transparent cryptographic analysis with fewer unexplainable magic values.
+// Furthermore, unlike RSA and ECDSA, the 25519 algortihms are very hard to
+// screw up - there is no dependence on a strong entropy source, and there is
+// no such thing as a "weak" or "malformed" key that might compromise security.
+enum ECryptoKeyType
+{
+	k_ECryptoKeyTypeInvalid = 0,
+	k_ECryptoKeyTypeRSAPublic = 1,				// RSA 1024, 2048, or higher bit
+	k_ECryptoKeyTypeRSAPrivate = 2,				// RSA 1024, 2048, or higher bit
+	k_ECryptoKeyTypeSigningPublic = 3,			// ed25519, always 256-bit
+	k_ECryptoKeyTypeSigningPrivate = 4,			// ed25519, always 256-bit
+	k_ECryptoKeyTypeKeyExchangePublic = 5,		// curve25519, always 256-bit
+	k_ECryptoKeyTypeKeyExchangePrivate = 6,		// curve25519, always 256-bit
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Base class to encapsulate an crypto key (RSA, EC, ECDSA).  This class
+//			cannot be instantiated directly, use one of the subclasses
+//			to indicate the intent of the key.
+//-----------------------------------------------------------------------------
+class CCryptoKeyBase 
+{
+public:
+	~CCryptoKeyBase() { Wipe(); }
+
+	bool operator==( const CCryptoKeyBase &rhs ) const;
+	bool operator!=( const CCryptoKeyBase &rhs ) const { return !operator==( rhs ); }
+
+	ECryptoKeyType GetKeyType() const { return m_eKeyType; }
+	const uint8 *GetData() const { return m_pbKey; }
+	uint32 GetLength() const { return m_cubKey; }
+	bool IsValid() const;
+
+	bool Set( const void* pData, const uint32 cbData );
+
+	void Wipe();
+
+	bool SetFromHexEncodedString( const char *pchEncodedKey );
+	bool SetFromBase64EncodedString( const char *pchEncodedKey );
+	void SetFromExternal( uint8 *pbKey, uint32 cubKey ) { m_pbKey = pbKey; m_cubKey = cubKey; m_bExternal = true; }
+
+	bool LoadFromAndWipeBuffer( void *pBuffer, size_t cBytes );
+
+	bool GetAsPEM( char *pchPEMData, uint32 cubPEMData, uint32 *pcubPEMData ) const;
+
+#ifdef DBGFLAG_VALIDATE
+	void Validate( CValidator &validator, const char *pchName ) const;		// Validate our internal structures
+#endif // DBGFLAG_VALIDATE
+
+protected:
+	explicit CCryptoKeyBase( ECryptoKeyType keyType ) : m_eKeyType( keyType ) { m_cubKey = 0; m_pbKey = NULL; m_bExternal = false; }
+	
+	void EnsureCapacity( uint32 cbData );
+
+	ECryptoKeyType m_eKeyType;
+	uint8	*m_pbKey;
+	uint32	m_cubKey;
+	bool m_bExternal;
+
+private:
+	CCryptoKeyBase( const CCryptoKeyBase &src ); // no impl
+	CCryptoKeyBase & operator=(const CCryptoKeyBase &rhs); // no impl
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Check validity of an crypto key object
+// Output:  true if successful, false the object is invalid
+//-----------------------------------------------------------------------------
+inline bool CCryptoKeyBase::IsValid() const
+{
+	return m_eKeyType != k_ECryptoKeyTypeInvalid && GetLength() > 0 && GetData() != NULL;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Clear the memory for an crypto key object
+//-----------------------------------------------------------------------------
+inline void CCryptoKeyBase::Wipe()
+{
+	if ( m_pbKey != NULL )
+	{
+		SecureZeroMemory( m_pbKey, m_cubKey );
+		if ( !m_bExternal )
+			delete [] m_pbKey;
+		m_pbKey = NULL;
+	}
+	m_cubKey = 0;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Define operator= and accessible copy constructor for public keys
+//-----------------------------------------------------------------------------
+class CCryptoPublicKeyBase : public CCryptoKeyBase
+{
+protected:
+	explicit CCryptoPublicKeyBase( ECryptoKeyType eKeyType ) : CCryptoKeyBase( eKeyType ) { }
+	CCryptoPublicKeyBase( const CCryptoPublicKeyBase &src ) : CCryptoKeyBase( src.m_eKeyType ) { Set( src.GetData(), src.GetLength() ); }
+	CCryptoPublicKeyBase& operator=( const CCryptoPublicKeyBase &rhs ) { Wipe(); Set( rhs.GetData(), rhs.GetLength() ); return *this; }
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Common base for x25519 and ed25519 private keys on the 25519 curve
+//			Internally, these are stored as 64 bytes (public[32] + private[32])
+//-----------------------------------------------------------------------------
+class CEC25519PrivateKeyBase : public CCryptoKeyBase
+{
+public:
+	bool IsValid() const { return ( m_eKeyType == k_ECryptoKeyTypeKeyExchangePrivate || m_eKeyType == k_ECryptoKeyTypeSigningPrivate ) && m_cubKey == 64 && m_pbKey; }
+	void GetPublicKey( CCryptoPublicKeyBase *pPublicKey ) const;
+	bool MatchesPublicKey( const CCryptoPublicKeyBase &pPublicKey ) const;
+
+	void RebuildFromPrivateData( const uint8 privateKeyData[32] );
+
+protected:
+	explicit CEC25519PrivateKeyBase( ECryptoKeyType eType ) : CCryptoKeyBase( eType ) { }
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates an RSA public key
+//-----------------------------------------------------------------------------
+class CRSAPublicKey: public CCryptoPublicKeyBase
+{
+public:
+	CRSAPublicKey() : CCryptoPublicKeyBase( k_ECryptoKeyTypeRSAPublic ) { }
+	uint32 GetModulusBytes( uint8 *pBufferOut, uint32 cbMaxBufferOut ) const;
+	uint32 GetExponentBytes( uint8 *pBufferOut, uint32 cbMaxBufferOut ) const;
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates an RSA private key
+//-----------------------------------------------------------------------------
+class CRSAPrivateKey: public CCryptoKeyBase
+{
+public:
+	CRSAPrivateKey() : CCryptoKeyBase( k_ECryptoKeyTypeRSAPrivate ) { }
+
+	void GetPublicKey( CRSAPublicKey *pPublicKey ) const;
+
+private:
+	CRSAPrivateKey( const CRSAPrivateKey &src ); // no impl
+	CRSAPrivateKey & operator=(const CRSAPrivateKey &rhs); // no impl
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates an elliptic-curve signature private key (x25519)
+//			Internally, this is stored as a 64-byte (public, private) pair
+//-----------------------------------------------------------------------------
+class CECKeyExchangePrivateKey : public CEC25519PrivateKeyBase
+{
+public:
+	CECKeyExchangePrivateKey() : CEC25519PrivateKeyBase( k_ECryptoKeyTypeKeyExchangePrivate ) { }
+	bool IsValid() const { return m_eKeyType == k_ECryptoKeyTypeKeyExchangePrivate && m_cubKey == 64 && m_pbKey; }
+
+private:
+	CECKeyExchangePrivateKey( const CECKeyExchangePrivateKey &src ); // no impl
+	CECKeyExchangePrivateKey & operator=(const CECKeyExchangePrivateKey &rhs); // no impl
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates an elliptic-curve key-exchange public key (curve25519)
+//			Internally, this is stored as a 32-byte binary data blob
+//-----------------------------------------------------------------------------
+class CECKeyExchangePublicKey : public CCryptoPublicKeyBase
+{
+public:
+	CECKeyExchangePublicKey() : CCryptoPublicKeyBase( k_ECryptoKeyTypeKeyExchangePublic ) { }
+	bool IsValid() const { return m_eKeyType == k_ECryptoKeyTypeKeyExchangePublic && m_cubKey == 32 && m_pbKey; }
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates an elliptic-curve signature private key (ed25519)
+//			Internally, this is stored as a 64-byte (public, private) pair
+//-----------------------------------------------------------------------------
+class CECSigningPrivateKey : public CEC25519PrivateKeyBase
+{
+public:
+	CECSigningPrivateKey() : CEC25519PrivateKeyBase( k_ECryptoKeyTypeSigningPrivate ) { }
+	bool IsValid() const { return m_eKeyType == k_ECryptoKeyTypeSigningPrivate && m_cubKey == 64 && m_pbKey; }
+
+private:
+	CECSigningPrivateKey( const CECSigningPrivateKey &src ); // no impl
+	CECSigningPrivateKey & operator=(const CECSigningPrivateKey &rhs); // no impl
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates an elliptic-curve signature public key (x25519)
+//			Internally, this is stored as a 32-byte binary data blob
+//-----------------------------------------------------------------------------
+class CECSigningPublicKey : public CCryptoPublicKeyBase
+{
+public:
+	CECSigningPublicKey() : CCryptoPublicKeyBase( k_ECryptoKeyTypeSigningPublic ) { }
+	bool IsValid() const { return m_eKeyType == k_ECryptoKeyTypeSigningPublic && m_cubKey == 32 && m_pbKey; }
+
+	bool GetAsOpenSSHAuthorizedKeys( char *pchData, uint32 cubData, uint32 *pcubData, const char *pszComment = "" ) const;
+};
+
+
+// callback interface to implement to use encryption or authentication
+class INetFilterKeyCallback
+{
+public:
+	virtual const CRSAPublicKey *GetPublicKey( EUniverse eUniverse, const char *pchKeyName ) = 0;
+	virtual const CRSAPrivateKey *GetPrivateKey( EUniverse eUniverse, const char *pchKeyName ) = 0;
+	virtual EUniverse GetUniverse() = 0;
+};
+
+#endif // KEYPAIR_H
+

src/common/opensslwrapper.cpp

@@ -0,0 +1,263 @@
+//====== Copyright 1996-2010, Valve Corporation, All rights reserved. =======
+//
+// Purpose: Code for dealing with OpenSSL library
+//
+//=============================================================================
+
+#include "stdafx.h"
+#include "opensslwrapper.h"
+
+#include <openssl/bio.h>
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+
+#include <mutex>
+#include <thread>
+
+// Applink is not relevant to us any more because we statically link OpenSSL
+//#ifdef _WIN32
+//#include <openssl/applink.c> 
+//#endif
+
+// Statics - all automatically zero-init
+int COpenSSLWrapper::m_nInstances;
+static std::recursive_mutex *s_pMutexArray;
+int COpenSSLWrapper::s_nContextDataIndex;
+int COpenSSLWrapper::s_nConnectionDataIndex;
+
+#ifdef _DEBUG
+int COpenSSLWrapper::m_nBytesLeaked = 0;
+#endif
+
+// Locking structure for OpenSSL usage
+struct CRYPTO_dynlock_value
+{
+	//CThreadMutex m_Mutex;
+	std::recursive_mutex m_Mutex;
+};
+
+
+#ifdef _WIN32
+//-----------------------------------------------------------------------------
+// Purpose: define a thin wrapper around RtlGenRandom (Windows XP and above)
+// that OpenSSL can use instead of its own md_rand system, which seriously sucks
+// on win32 as it gathers "entropy" from a toolhelp32 snapshot and GDI functions
+// while keeping the entire random generator state in process memory. better to
+// let the OS hide the PRNG state from our process and just give us the result.
+// (RtlGenRandom is also faster, at less than 1 microsecond per 16 byte output.)
+//-----------------------------------------------------------------------------
+static int RAND_Win32CryptoGenRandom_bytes( unsigned char *buf, int num ) {
+	typedef BYTE ( __stdcall *PfnRtlGenRandom_t )( PVOID, ULONG );
+	static PfnRtlGenRandom_t s_pfnRtlGenRandom = nullptr;
+	static bool once;
+	if ( !once )
+	{
+		once = true;
+		s_pfnRtlGenRandom = (PfnRtlGenRandom_t)(void*)GetProcAddress( LoadLibraryA( "advapi32.dll" ), "SystemFunction036" );
+	}
+	AssertFatal( s_pfnRtlGenRandom && s_pfnRtlGenRandom( buf, num ) );
+	return 1;
+}
+static int RAND_Win32CryptoGenRandom_status() { return 1; }
+static const RAND_METHOD RAND_Win32CryptoGenRandom = 
+{
+	NULL,								// seed entropy
+	RAND_Win32CryptoGenRandom_bytes,	// generate random
+	NULL,								// cleanup
+	NULL,								// add entropy
+	RAND_Win32CryptoGenRandom_bytes,	// generate pseudo-random
+	RAND_Win32CryptoGenRandom_status	// status
+};
+#endif
+
+#ifdef ANDROID
+// This isn't in the headers, but is implemented for Android 2.4 and newer
+extern "C" int pthread_atfork(void (*prepare)(void), void (*parent)(void), void(*child)(void));
+#endif
+
+//-----------------------------------------------------------------------------
+// Purpose: Initialize OpenSSL, may call multiple times and will ref count, 
+// call COpenSSLWrapper::Shutdown() a matching number of times.
+//-----------------------------------------------------------------------------
+void COpenSSLWrapper::Initialize()
+{
+	// If this is the first instance then we need to do some one time initialization of the OpenSSL library
+	if ( m_nInstances++ == 0 )
+	{
+//#ifdef _DEBUG
+//		// OpenSSL internal leak tracking should be used in debug
+//		CRYPTO_malloc_debug_init();
+//		CRYPTO_set_mem_ex_functions( &VALVE_CRYPTO_dbg_malloc, &VALVE_CRYPTO_dbg_realloc, &VALVE_CRYPTO_dbg_free );
+//		CRYPTO_dbg_set_options( V_CRYPTO_MDEBUG_ALL );
+//		CRYPTO_mem_ctrl( CRYPTO_MEM_CHECK_ON );
+//#else	
+//		CRYPTO_set_mem_ex_functions( &VALVE_CRYPTO_dbg_malloc, &VALVE_CRYPTO_dbg_realloc, &VALVE_CRYPTO_dbg_free );
+//#endif
+		SSL_library_init();
+		SSL_load_error_strings();
+		ERR_load_BIO_strings();
+
+		s_pMutexArray = new std::recursive_mutex[CRYPTO_num_locks()];
+		CRYPTO_set_locking_callback( COpenSSLWrapper::OpenSSLLockingCallback );
+		CRYPTO_set_id_callback( COpenSSLWrapper::OpenSSLThreadIDCallback );
+
+		CRYPTO_set_dynlock_create_callback( COpenSSLWrapper::OpenSSLDynLockCreateCallback );
+		CRYPTO_set_dynlock_destroy_callback( COpenSSLWrapper::OpenSSLDynLockDestroyCallback );
+		CRYPTO_set_dynlock_lock_callback( COpenSSLWrapper::OpenSSLDynLockLockCallback );
+
+		OpenSSL_add_all_algorithms();
+
+		COpenSSLWrapper::s_nContextDataIndex = SSL_get_ex_new_index(0, (void*)"COpenSSLContext", NULL, NULL, NULL);
+		COpenSSLWrapper::s_nConnectionDataIndex = SSL_get_ex_new_index(0, (void*)"COpenSSLConnection", NULL, NULL, NULL);
+
+#ifdef _WIN32
+		RAND_set_rand_method( &RAND_Win32CryptoGenRandom );
+#endif
+
+#ifdef OSX
+		pthread_atfork( NULL, NULL, []{ arc4random_stir(); RAND_poll(); } );
+#elif defined(POSIX)
+		pthread_atfork( NULL, NULL, []{ RAND_poll(); } );
+#endif
+
+		int iStatus = RAND_status();
+		AssertMsg( iStatus == 1, "OpenSSL random number system reports not enough entropy" );
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Shutdown OpenSSL, number of calls must match those to COpenSSLWrapper::Initialize()
+//-----------------------------------------------------------------------------
+void COpenSSLWrapper::Shutdown()
+{
+	// If this is the last instance, then we can do some one time cleanup of the library
+	if ( m_nInstances-- == 1 )
+	{
+		EVP_cleanup();
+
+		/* Don't call ERR_free_strings here; ERR_load_*_strings only
+		 * actually load the error strings once per process due to static
+		 * variable abuse in OpenSSL. */
+		ERR_free_strings();
+		ERR_remove_state(0);
+		CRYPTO_cleanup_all_ex_data();
+
+//#ifdef _DEBUG
+//		// This isn't great right now, as it will report leaks on unload of steamclient.dll in the server, due to server.dll still
+//		// using shared resources from the shared OpenSSL lib.
+//		COpenSSLWrapper::m_nBytesLeaked = 0;
+//		CRYPTO_mem_leaks_cb( COpenSSLWrapper::OpenSSLMemLeakCallback );
+//		//if ( COpenSSLWrapper::m_nBytesLeaked > 0 )
+//		//	Msg( CFmtStr1024( "OpenSSL memory still used: %s\n", V_pretifymem( (float)m_nBytesLeaked, 2 ) ).Access() );
+//#endif
+
+		CRYPTO_set_locking_callback( NULL );
+		CRYPTO_set_id_callback( NULL );
+
+		CRYPTO_set_dynlock_create_callback( NULL );
+		CRYPTO_set_dynlock_destroy_callback( NULL );
+		CRYPTO_set_dynlock_lock_callback( NULL );
+
+		delete[] s_pMutexArray;
+		s_pMutexArray = NULL;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: OpenSSL callback func needed for threading support
+//-----------------------------------------------------------------------------
+void COpenSSLWrapper::OpenSSLLockingCallback( int mode, int type, const char *file, int line )
+{
+	// We are shutting down if this is NULL, won't need locking as we only have the main thread then right?
+	if ( s_pMutexArray == NULL )
+		return;
+
+	if ( mode & CRYPTO_LOCK )
+	{
+		s_pMutexArray[type].lock();
+	}
+	else
+	{
+		s_pMutexArray[type].unlock();
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: OpenSSL callback func needed for threading support
+//-----------------------------------------------------------------------------
+unsigned long COpenSSLWrapper::OpenSSLThreadIDCallback( void )
+{
+	std::hash<std::thread::id> hash;
+	return (unsigned long)hash( std::this_thread::get_id() );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: OpenSSL callback func needed for threading support
+//-----------------------------------------------------------------------------
+CRYPTO_dynlock_value* COpenSSLWrapper::OpenSSLDynLockCreateCallback( const char* file, int line )
+{
+	return new CRYPTO_dynlock_value;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: OpenSSL callback func needed for threading support
+//-----------------------------------------------------------------------------
+void COpenSSLWrapper::OpenSSLDynLockDestroyCallback( CRYPTO_dynlock_value * l, const char *file, int line )
+{
+	delete l;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: OpenSSL callback func needed for threading support
+//-----------------------------------------------------------------------------
+void COpenSSLWrapper::OpenSSLDynLockLockCallback( int mode, CRYPTO_dynlock_value *l, const char* file, int line )
+{
+	if ( mode & CRYPTO_LOCK )
+	{
+		l->m_Mutex.lock();
+	}
+	else
+	{
+		l->m_Mutex.unlock();
+	}
+}
+
+
+#ifdef _DEBUG
+//-----------------------------------------------------------------------------
+// Purpose: OpenSSL callback func, used to print/track memory leaks in OpenSSL
+//-----------------------------------------------------------------------------
+void *COpenSSLWrapper::OpenSSLMemLeakCallback( unsigned long order, const char *file, int line, int num_bytes, void * addr )
+{
+	//Plat_OutputDebugString( CFmtStr1024( "OpenSSL Leak: %16u %52s:%8d %16d 0x%8X\n", order, file, line, num_bytes, addr ).Access() );
+	m_nBytesLeaked += num_bytes;
+	return addr;
+}
+#endif
+
+
+
+#ifdef DBGFLAG_VALIDATE
+//-----------------------------------------------------------------------------
+// Purpose: validates memory structures
+//-----------------------------------------------------------------------------
+void COpenSSLWrapper::ValidateStatics( CValidator &validator, const char *pchName )
+{
+	if ( COpenSSLWrapper::s_pMutexArray && !validator.IsClaimed( COpenSSLWrapper::s_pMutexArray ) )
+	{
+		validator.ClaimArrayMemory( COpenSSLWrapper::s_pMutexArray );
+		for( int i=0; i < CRYPTO_num_locks(); ++i )
+		{
+			validator.ClaimMemory( s_pMutexArray[i] );
+		}
+	}
+}
+#endif
+

src/common/opensslwrapper.h

@@ -0,0 +1,61 @@
+//====== Copyright 1996-2010, Valve Corporation, All rights reserved. =======
+//
+// Purpose: Code for dealing with OpenSSL library
+//
+//=============================================================================
+
+#ifndef OPENSSLWRAPPER_H
+#define OPENSSLWRAPPER_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+// Locking structure for OpenSSL usage
+struct CRYPTO_dynlock_value;
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Wrapper for OpenSSL
+//-----------------------------------------------------------------------------
+class COpenSSLWrapper
+{
+public:
+	static void Initialize();
+	static void Shutdown();
+	static bool BIsOpenSSLInitialized() { return m_nInstances > 0; }
+	static int GetContextDataIndex() { return s_nContextDataIndex; }
+	static int GetConnectionDataIndex() { return s_nConnectionDataIndex; }
+
+
+	// OpenSSL callback functions for threading
+	static void OpenSSLLockingCallback( int mode, int type, const char *file, int line );
+	static unsigned long OpenSSLThreadIDCallback( void );
+	static CRYPTO_dynlock_value* OpenSSLDynLockCreateCallback( const char* file, int line );
+	static void OpenSSLDynLockDestroyCallback( CRYPTO_dynlock_value * l, const char *file, int line );
+	static void OpenSSLDynLockLockCallback( int mode, CRYPTO_dynlock_value *l, const char* file, int line );
+
+#ifdef _DEBUG
+	// In debug we track OpenSSL memory usage via it's internal mechanism for this
+	static void *OpenSSLMemLeakCallback( unsigned long order, const char *file, int line, int num_bytes, void * addr );
+	static int m_nBytesLeaked;
+#endif
+
+#ifdef DBGFLAG_VALIDATE
+	static void ValidateStatics( CValidator &validator, const char *pchName );
+#endif
+
+
+private:
+	// Some statics to track how many context objects exist and to perform one time OpenSSL library initialization
+	// when needed.
+	static int m_nInstances;
+	// VOID to avoid include on engine.h, as it can lead to some conflicts in places we need to include this header
+	static void *s_pAESNIEngine;
+	static int s_nContextDataIndex;
+	static int s_nConnectionDataIndex;
+
+};
+
+
+#endif // OPENSSLWRAPPER_H
+

src/common/stdafx.h

@@ -0,0 +1,14 @@
+// Dummy
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <minbase/minbase_identify.h>
+#include <minbase/minbase_types.h>
+#include <steam/steamtypes.h>
+#include <tier0/dbg.h>
+#include <vstdlib/strtools.h>
+//#include <tier0/threadtools.h>
+

src/common/steamid.cpp

@@ -0,0 +1,715 @@
+//========= Copyright Valve LLC, All rights reserved. ============
+
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <minbase/minbase_identify.h>
+#include <minbase/minbase_types.h>
+#include <tier0/dbg.h>
+#include <vstdlib/strtools.h>
+
+#include "steamid.h"
+
+static const char *DecimalToUint64( const char *pchStr, uint64 unLimit,
+                                    uint64 *punVal )
+{
+    const char *pchStart = pchStr;
+    uint64 unVal = 0;
+
+    while ( *pchStr >= '0' && *pchStr <= '9' )
+    {
+        uint64 unNext = unVal * 10;
+        
+        if ( unNext < unVal )
+        {
+            // 64-bit overflow.
+            return NULL;
+        }
+
+        unVal = unNext + (uint64)( *pchStr - '0' );
+        if ( unVal > unLimit )
+        {
+            // Limit overflow.
+            return NULL;
+        }
+
+        pchStr++;
+    }
+    if ( pchStr == pchStart )
+    {
+        // No number at all.
+        return NULL;
+    }
+
+    *punVal = unVal;
+    return pchStr;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructor
+// Input  : pchSteamID -		text representation of a Steam ID
+//-----------------------------------------------------------------------------
+CSteamID::CSteamID( const char *pchSteamID, EUniverse eDefaultUniverse /* = k_EUniverseInvalid */  )
+{
+	SetFromString( pchSteamID, eDefaultUniverse );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Initializes a steam ID from a string
+// Input  : pchSteamID -		text representation of a Steam ID
+//-----------------------------------------------------------------------------
+void CSteamID::SetFromString( const char *pchSteamID, EUniverse eDefaultUniverse )
+{
+	uint nAccountID = 0;
+	uint nInstance = 1;
+	EUniverse eUniverse = eDefaultUniverse;
+	EAccountType eAccountType = k_EAccountTypeIndividual;
+    const char *pchSteamIDString = pchSteamID;
+    CSteamID StrictID;
+
+    StrictID.SetFromStringStrict( pchSteamID, eDefaultUniverse );
+
+	if ( *pchSteamID == '[' )
+		pchSteamID++;
+
+	// BUGBUG Rich use the Q_ functions
+	if (*pchSteamID == 'A')
+	{
+		// This is test only
+		pchSteamID++; // skip the A
+		eAccountType = k_EAccountTypeAnonGameServer;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+
+		if ( strchr( pchSteamID, '(' ) )
+			sscanf( strchr( pchSteamID, '(' ), "(%u)", &nInstance );
+		const char *pchColon = strchr( pchSteamID, ':' );
+		if ( pchColon && *pchColon != 0 && strchr( pchColon+1, ':' ))
+		{
+			sscanf( pchSteamID, "%u:%u:%u", (uint*)&eUniverse, &nAccountID, &nInstance );
+		}
+		else if ( pchColon )
+		{
+			sscanf( pchSteamID, "%u:%u", (uint*)&eUniverse, &nAccountID );
+		}
+		else
+		{
+			sscanf( pchSteamID, "%u", &nAccountID );
+		}
+
+		if ( nAccountID == 0 )
+		{
+			// i dont care what number you entered
+			CreateBlankAnonLogon(eUniverse);
+		}
+		else
+		{
+			InstancedSet( nAccountID, nInstance, eUniverse, eAccountType );
+		}
+        // Catch cases where we're allowing sloppy input that we
+        // might not want to allow.
+        AssertMsg1( this->operator==( StrictID ), "Steam ID does not pass strict parsing: '%s'", pchSteamIDString );
+		return;
+	}
+	else if (*pchSteamID == 'G')
+	{
+		pchSteamID++; // skip the G
+		eAccountType = k_EAccountTypeGameServer;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'C')
+	{
+		pchSteamID++; // skip the C
+		eAccountType = k_EAccountTypeContentServer;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'g')
+	{
+		pchSteamID++; // skip the g
+		eAccountType = k_EAccountTypeClan;
+		nInstance = 0;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'c')
+	{
+		pchSteamID++; // skip the c
+		eAccountType = k_EAccountTypeChat;
+		nInstance = k_EChatInstanceFlagClan;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'L')
+	{
+		pchSteamID++; // skip the c
+		eAccountType = k_EAccountTypeChat;
+		nInstance = k_EChatInstanceFlagLobby;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'T')
+	{
+		pchSteamID++; // skip the T
+		eAccountType = k_EAccountTypeChat;
+		nInstance = 0;	// Anon chat
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'U')
+	{
+		pchSteamID++; // skip the U
+		eAccountType = k_EAccountTypeIndividual;
+		nInstance = 1;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+	else if (*pchSteamID == 'i')
+	{
+		pchSteamID++; // skip the i
+		eAccountType = k_EAccountTypeInvalid;
+		nInstance = 1;
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+	}
+
+	if ( strchr( pchSteamID, ':' ) )
+	{
+		if (*pchSteamID == '[')
+			pchSteamID++; // skip the optional [
+		sscanf( pchSteamID, "%u:%u", (uint*)&eUniverse, &nAccountID );
+		if ( eUniverse == k_EUniverseInvalid )
+			eUniverse = eDefaultUniverse; 
+	}
+	else
+	{
+        uint64 unVal64 = 0;
+        
+		sscanf( pchSteamID, "%llu", &unVal64 );
+        if ( unVal64 > UINT_MAX )
+        {
+            // Assume a full 64-bit Steam ID.
+            SetFromUint64( unVal64 );
+            // Catch cases where we're allowing sloppy input that we
+            // might not want to allow.
+            AssertMsg1( this->operator==( StrictID ), "Steam ID does not pass strict parsing: '%s'", pchSteamIDString );
+            return;
+        }
+        else
+        {
+            nAccountID = (uint)unVal64;
+        }
+	}	
+	
+	Assert( (eUniverse > k_EUniverseInvalid) && (eUniverse < k_EUniverseMax) );
+
+	InstancedSet( nAccountID, nInstance, eUniverse, eAccountType );
+
+    // Catch cases where we're allowing sloppy input that we
+    // might not want to allow.
+    AssertMsg1( this->operator==( StrictID ), "Steam ID does not pass strict parsing: '%s'", pchSteamIDString );
+}
+
+// SetFromString allows many partially-correct strings, constraining how
+// we might be able to change things in the future.
+// SetFromStringStrict requires the exact string forms that we support
+// and is preferred when the caller knows it's safe to be strict.
+// Returns whether the string parsed correctly.  The ID may
+// still be invalid even if the string parsed correctly.
+// If the string didn't parse correctly the ID will always be invalid.
+bool CSteamID::SetFromStringStrict( const char *pchSteamID, EUniverse eDefaultUniverse )
+{
+	uint nAccountID = 0;
+	uint nInstance = 1;
+    uint unMaxVal = 2;
+	EUniverse eUniverse = eDefaultUniverse;
+	EAccountType eAccountType = k_EAccountTypeIndividual;
+    char chPrefix;
+    bool bBracket = false;
+    bool bValid = true;
+    uint64 unVal[3];
+    const char *pchEnd;
+
+    // Start invalid.
+    Clear();
+    
+    if ( !pchSteamID )
+    {
+        return false;
+    }
+    
+	if ( *pchSteamID == '[' )
+    {
+		pchSteamID++;
+        bBracket = true;
+    }
+
+    chPrefix = *pchSteamID;
+    switch( chPrefix )
+    {
+    case 'A':
+		// This is test only
+		eAccountType = k_EAccountTypeAnonGameServer;
+        unMaxVal = 3;
+        break;
+
+    case 'G':
+		eAccountType = k_EAccountTypeGameServer;
+        break;
+
+    case 'C':
+		eAccountType = k_EAccountTypeContentServer;
+        break;
+
+    case 'g':
+		eAccountType = k_EAccountTypeClan;
+		nInstance = 0;
+        break;
+
+    case 'c':
+		eAccountType = k_EAccountTypeChat;
+		nInstance = k_EChatInstanceFlagClan;
+        break;
+
+    case 'L':
+		eAccountType = k_EAccountTypeChat;
+		nInstance = k_EChatInstanceFlagLobby;
+        break;
+
+    case 'T':
+		eAccountType = k_EAccountTypeChat;
+		nInstance = 0;	// Anon chat
+        break;
+
+    case 'U':
+		eAccountType = k_EAccountTypeIndividual;
+		nInstance = 1;
+        break;
+
+    case 'i':
+		eAccountType = k_EAccountTypeInvalid;
+		nInstance = 1;
+        break;
+
+    default:
+        // We're reserving other leading characters so
+        // this should only be the plain-digits case.
+        if (chPrefix < '0' || chPrefix > '9')
+        {
+            bValid = false;
+        }
+        chPrefix = 0;
+        break;
+    }
+
+    if ( chPrefix )
+    {
+        pchSteamID++; // skip the prefix
+		if (*pchSteamID == '-' || *pchSteamID == ':')
+			pchSteamID++; // skip the optional - or :
+    }
+
+    uint unIdx = 0;
+
+    for (;;)
+    {
+        pchEnd = DecimalToUint64( pchSteamID, UINT64_MAX, &unVal[unIdx] );
+        if ( !pchEnd )
+        {
+            bValid = false;
+            break;
+        }
+
+        unIdx++;
+
+        // For 'A' we can have a trailing instance, which must
+        // be the end of the string.
+        if ( *pchEnd == '(' &&
+             chPrefix == 'A' )
+        {
+            if ( unIdx > 2 )
+            {
+                // Two instance IDs provided.
+                bValid = false;
+            }
+            
+            pchEnd = DecimalToUint64( pchEnd + 1, k_unSteamAccountInstanceMask, &unVal[2] );
+            if ( !pchEnd ||
+                 *pchEnd != ')' )
+            {
+                bValid = false;
+                break;
+            }
+            else
+            {
+                nInstance = (uint)unVal[2];
+
+                pchEnd++;
+                if ( *pchEnd == ':' )
+                {
+                    // Not expecting more values.
+                    bValid = false;
+                    break;
+                }
+            }
+        }
+
+        if ( *pchEnd != ':' )
+        {
+            if ( bBracket )
+            {
+                if ( *pchEnd != ']' ||
+                     *(pchEnd + 1) != 0 )
+                {
+                    bValid = false;
+                }
+            }
+            else if ( *pchEnd != 0 )
+            {
+                bValid = false;
+            }
+
+            break;
+        }
+
+        if ( unIdx >= unMaxVal )
+        {
+            bValid = false;
+            break;
+        }
+
+        pchSteamID = pchEnd + 1;
+    }
+
+    if ( unIdx > 2 )
+    {
+        if ( unVal[2] <= k_unSteamAccountInstanceMask )
+        {
+            nInstance = (uint)unVal[2];
+        }
+        else
+        {
+            bValid = false;
+        }
+    }
+    if ( unIdx > 1 )
+    {
+        if ( unVal[0] >= k_EUniverseInvalid &&
+             unVal[0] < k_EUniverseMax )
+        {
+            eUniverse = (EUniverse)unVal[0];
+            if ( eUniverse == k_EUniverseInvalid )
+                eUniverse = eDefaultUniverse;
+        }
+        else
+        {
+            bValid = false;
+        }
+
+        if ( unVal[1] <= k_unSteamAccountIDMask )
+        {
+            nAccountID = (uint)unVal[1];
+        }
+        else
+        {
+            bValid = false;
+        }
+    }
+    else if ( unIdx > 0 )
+    {
+        if ( unVal[0] <= k_unSteamAccountIDMask )
+        {
+            nAccountID = (uint)unVal[0];
+        }
+        else if ( !chPrefix )
+        {
+            if ( bValid )
+            {
+                SetFromUint64( unVal[0] );
+            }
+            return bValid;
+        }
+        else
+        {
+            bValid = false;
+        }
+    }
+    else
+    {
+        bValid = false;
+    }
+
+    if ( bValid )
+    {
+        if ( chPrefix == 'A' )
+        {
+            if ( nAccountID == 0 )
+            {
+                // i dont care what number you entered
+                CreateBlankAnonLogon(eUniverse);
+                return bValid;
+            }
+        }
+
+        InstancedSet( nAccountID, nInstance, eUniverse, eAccountType );
+    }
+
+    return bValid;
+}
+
+
+#if defined( INCLUDED_STEAM2_USERID_STRUCTS ) 
+//-----------------------------------------------------------------------------
+// Purpose: Initializes a steam ID from a Steam2 ID string
+// Input:	pchSteam2ID -	Steam2 ID (as a string #:#:#) to convert
+//			eUniverse -		universe this ID belongs to
+// Output:	true if successful, false otherwise
+//-----------------------------------------------------------------------------
+bool CSteamID::SetFromSteam2String( const char *pchSteam2ID, EUniverse eUniverse )
+{
+	Assert( pchSteam2ID );
+
+	// Convert the Steam2 ID string to a Steam2 ID structure
+	TSteamGlobalUserID steam2ID;
+	steam2ID.m_SteamInstanceID = 0;
+	steam2ID.m_SteamLocalUserID.Split.High32bits = 0;
+	steam2ID.m_SteamLocalUserID.Split.Low32bits	= 0;
+
+	const char *pchTSteam2ID = pchSteam2ID;
+
+	// Customer support is fond of entering steam IDs in the following form:  STEAM_n:x:y
+	const char *pchOptionalLeadString = "STEAM_";
+	if ( V_strnicmp( pchSteam2ID, pchOptionalLeadString, V_strlen( pchOptionalLeadString ) ) == 0 )
+		pchTSteam2ID = pchSteam2ID + V_strlen( pchOptionalLeadString );
+
+	char cExtraCharCheck = 0;
+
+	int cFieldConverted = sscanf( pchTSteam2ID, "%hu:%u:%u%c", &steam2ID.m_SteamInstanceID, 
+		&steam2ID.m_SteamLocalUserID.Split.High32bits, &steam2ID.m_SteamLocalUserID.Split.Low32bits, &cExtraCharCheck );
+
+	// Validate the conversion ... a special case is steam2 instance ID 1 which is reserved for special DoD handling
+	if ( cExtraCharCheck != 0 || cFieldConverted == EOF || cFieldConverted < 2 || ( cFieldConverted < 3 && steam2ID.m_SteamInstanceID != 1 ) )
+		return false;
+
+	// Now convert to steam ID from the Steam2 ID structure
+	SetFromSteam2( &steam2ID, eUniverse );
+	return true;
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// Purpose: Renders the steam ID to a buffer.  NOTE: for convenience of calling
+//			code, this code returns a pointer to a static buffer and is NOT thread-safe.
+// Output:  buffer with rendered Steam ID
+//-----------------------------------------------------------------------------
+const char * CSteamID::Render() const
+{
+	// longest length of returned string is k_cBufLen
+	//	[A:%u:%u:%u]
+	//	 %u == 10 * 3 + 6 == 36, plus terminator == 37
+	const int k_cBufLen = 37;
+
+	const int k_cBufs = 4;	// # of static bufs to use (so people can compose output with multiple calls to Render() )
+	static char rgchBuf[k_cBufs][k_cBufLen];
+	static int nBuf = 0;
+	char * pchBuf = rgchBuf[nBuf];	// get pointer to current static buf
+	nBuf ++;	// use next buffer for next call to this method
+	nBuf %= k_cBufs;
+
+	if ( k_EAccountTypeAnonGameServer == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[A:%u:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID, m_steamid.m_comp.m_unAccountInstance );
+	}
+	else if ( k_EAccountTypeGameServer == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[G:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	else if ( k_EAccountTypeMultiseat == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[M:%u:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID, m_steamid.m_comp.m_unAccountInstance );
+	} 
+	else if ( k_EAccountTypePending == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[P:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	} 
+	else if ( k_EAccountTypeContentServer == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[C:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	else if ( k_EAccountTypeClan == m_steamid.m_comp.m_EAccountType )
+	{
+		// 'g' for "group"
+		V_snprintf( pchBuf, k_cBufLen, "[g:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	else if ( k_EAccountTypeChat == m_steamid.m_comp.m_EAccountType )
+	{
+		if ( m_steamid.m_comp.m_unAccountInstance & k_EChatInstanceFlagClan )
+		{
+			V_snprintf( pchBuf, k_cBufLen, "[c:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+		}
+		else if ( m_steamid.m_comp.m_unAccountInstance & k_EChatInstanceFlagLobby )
+		{
+			V_snprintf( pchBuf, k_cBufLen, "[L:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+		}
+		else // Anon chat
+		{
+			V_snprintf( pchBuf, k_cBufLen, "[T:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+		}
+	}
+	else if ( k_EAccountTypeInvalid == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[I:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	else if ( k_EAccountTypeIndividual == m_steamid.m_comp.m_EAccountType )
+	{
+		if ( m_steamid.m_comp.m_unAccountInstance != k_unSteamUserDesktopInstance )
+			V_snprintf( pchBuf, k_cBufLen, "[U:%u:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID, m_steamid.m_comp.m_unAccountInstance );
+		else
+			V_snprintf( pchBuf, k_cBufLen, "[U:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	else if ( k_EAccountTypeAnonUser == m_steamid.m_comp.m_EAccountType )
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[a:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	else
+	{
+		V_snprintf( pchBuf, k_cBufLen, "[i:%u:%u]", m_steamid.m_comp.m_EUniverse, m_steamid.m_comp.m_unAccountID );
+	}
+	return pchBuf;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Renders the passed-in steam ID to a buffer.  NOTE: for convenience of calling
+//			code, this code returns a pointer to a static buffer and is NOT thread-safe.
+// Input:	64-bit representation of Steam ID to render
+// Output:  buffer with rendered Steam ID
+//-----------------------------------------------------------------------------
+const char * CSteamID::Render( uint64 ulSteamID )
+{
+	CSteamID steamID( ulSteamID );
+	return steamID.Render();
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: some steamIDs are for internal use only
+// This is really debug code, but we run with asserts on in retail, so ...
+//-----------------------------------------------------------------------------
+bool CSteamID::BValidExternalSteamID() const
+{
+	if ( m_steamid.m_comp.m_EAccountType == k_EAccountTypePending )
+		return false;
+	if ( m_steamid.m_comp.m_EAccountType != k_EAccountTypeAnonGameServer && m_steamid.m_comp.m_EAccountType != k_EAccountTypeContentServer && m_steamid.m_comp.m_EAccountType != k_EAccountTypeAnonUser )
+	{
+		if ( m_steamid.m_comp.m_unAccountID == 0 && m_steamid.m_comp.m_unAccountInstance == 0 )
+			return false;
+	}
+	return true;
+}
+
+#ifdef STEAM
+//-----------------------------------------------------------------------------
+// Purpose:	Returns the matching chat steamID, with the default instance of 0
+// Input:	SteamID, either a Clan or a Chat type
+// Output:	SteamID with account type changed to chat, and the Clan flag set. 
+//			If account type was not chat to start with, instance will be set to 0
+//-----------------------------------------------------------------------------
+CSteamID ChatIDFromSteamID( const CSteamID &steamID )
+{
+	if ( steamID.GetEAccountType() == k_EAccountTypeChat )
+		return steamID;
+
+	return ChatIDFromClanID( steamID );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose:	Returns the matching chat steamID, with the default instance of 0
+// Input:	SteamID, either a Clan type or a Chat type w/ the Clan flag set
+// Output:	SteamID with account type changed to clan.  
+//			If account type was not clan to start with, instance will be set to 0
+//-----------------------------------------------------------------------------
+CSteamID ClanIDFromSteamID( const CSteamID &steamID )
+{
+	if ( steamID.GetEAccountType() == k_EAccountTypeClan )
+		return steamID;
+
+	return ClanIDFromChatID( steamID );
+}
+
+
+// Asserts steamID type before conversion
+CSteamID ChatIDFromClanID( const CSteamID &steamIDClan )
+{
+	Assert( steamIDClan.GetEAccountType() == k_EAccountTypeClan );
+
+	return CSteamID( steamIDClan.GetAccountID(), k_EChatInstanceFlagClan, steamIDClan.GetEUniverse(), k_EAccountTypeChat );
+}
+
+
+// Asserts steamID type before conversion
+CSteamID ClanIDFromChatID( const CSteamID &steamIDChat )
+{
+	Assert( steamIDChat.GetEAccountType() == k_EAccountTypeChat );
+	Assert( k_EChatInstanceFlagClan & steamIDChat.GetUnAccountInstance() );
+
+	return CSteamID( steamIDChat.GetAccountID(), 0, steamIDChat.GetEUniverse(), k_EAccountTypeClan );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose:	CGameID "hidden" functions
+//			move these somewhere else maybe
+//-----------------------------------------------------------------------------
+CGameID::CGameID( const char *pchGameID )
+{
+	m_ulGameID = 0;
+
+	sscanf( pchGameID, "%llu", &m_ulGameID );
+
+	switch ( m_gameID.m_nType )
+	{
+	default:
+		AssertMsg( false, "Unknown GameID type" );
+		m_ulGameID = 0;
+		break;
+	case k_EGameIDTypeApp:
+	case k_EGameIDTypeGameMod:
+	case k_EGameIDTypeShortcut:
+	case k_EGameIDTypeP2P:
+		break;
+	}
+}
+
+
+// renders this Game ID to string
+const char * CGameID::Render() const
+{
+	// longest buffer is log10(2**64) == 20 + 1 == 21
+	const int k_cBufLen = 21;
+
+	const int k_cBufs = 4;	// # of static bufs to use (so people can compose output with multiple calls to Render() )
+	static char rgchBuf[k_cBufs][k_cBufLen];
+	static int nBuf = 0;
+	char * pchBuf = rgchBuf[nBuf];	// get pointer to current static buf
+	nBuf ++;	// use next buffer for next call to this method
+	nBuf %= k_cBufs;
+
+	V_snprintf( pchBuf, k_cBufLen, "%llu", m_ulGameID );
+
+	return pchBuf;
+}
+
+// static method to render a uint64 representation of a Game ID to a string
+const char * CGameID::Render( uint64 ulGameID )
+{
+	CGameID nGameID( ulGameID );
+	return nGameID.Render();
+}
+#endif

src/common/steamid.h

@@ -0,0 +1,65 @@
+//========= Copyright © 1996-2004, Valve LLC, All rights reserved. ============
+//
+// Purpose:
+//
+// $NoKeywords: $
+//=============================================================================
+
+#ifndef STEAMID_H
+#define STEAMID_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "steam/steamtypes.h" // int64 define
+
+#ifndef INCLUDED_STEAM2_USERID_STRUCTS
+
+// Old Steam2 ID stuff
+typedef	unsigned short		SteamInstanceID_t;		// MUST be 16 bits
+typedef uint64			SteamLocalUserID_t;		// MUST be 64 bits
+
+// Old steam2 user ID structures
+typedef struct	
+{
+	unsigned int	Low32bits;
+	unsigned int	High32bits;
+}	TSteamSplitLocalUserID;
+
+typedef struct
+{
+	SteamInstanceID_t		m_SteamInstanceID;
+
+	union
+	{
+		SteamLocalUserID_t		As64bits;
+		TSteamSplitLocalUserID	Split;
+	}						m_SteamLocalUserID;
+
+} TSteamGlobalUserID;
+
+#define INCLUDED_STEAM2_USERID_STRUCTS
+#endif
+
+#include "steam/steamclientpublic.h"	// must be after definitions of the above structures
+
+#ifdef GENERICHASH_H
+inline uint32 HashItem( const CSteamID &item )
+{
+	return HashItemAsBytes(item);
+}
+#endif
+
+typedef void * SteamUserIDTicketValidationHandle_t;
+
+struct Steam2WrapperTicket_s
+{
+	unsigned int		m_VersionID; // = 1
+	TSteamGlobalUserID  m_UserID;
+	unsigned int		m_unPublicIP;
+	SteamUserIDTicketValidationHandle_t m_Handle; // 
+};
+
+
+#endif // STEAMID_H

src/common/steamnetworkingsockets_messages.proto

@@ -0,0 +1,277 @@
+//====== Copyright Valve Corporation, All rights reserved. ====================
+//
+// Wire format messages for Steam datagram transport
+//
+//=============================================================================
+syntax = "proto2";
+
+// Note about encoding:
+//	http://code.google.com/apis/protocolbuffers/docs/encoding.html
+//
+// TL;DR: Use sint32/sint64 for values that may be negative.
+//
+// There is an important difference between the signed int types (sint32 and sint64)
+// and the "standard" int types (int32 and int64) when it comes to encoding negative
+// numbers.  If you use int32 or int64 as the type for a negative number, the
+// resulting varint is always ten bytes long – it is, effectively, treated like a
+// very large unsigned integer.  If you use one of the signed types, the resulting
+// varint uses ZigZag encoding, which is much more efficient.
+
+
+// Commenting this out allows it to be compiled for SPEED or LITE_RUNTIME.
+// option optimize_for = SPEED;
+
+// We don't use the service generation functionality
+option cc_generic_services = false;
+
+// 
+// STYLE NOTES:
+//
+// Use CamelCase CMsgMyMessageName style names for messages.
+// 
+// Use lowercase _ delimited names like my_steam_id for field names, this is non-standard for Steam,
+// but plays nice with the Google formatted code generation.  
+// 
+// Try not to use required fields ever. Only do so if you are really really sure you'll never want them removed. 
+// Optional should be preffered as it will make versioning easier and cleaner in the future if someone refactors
+// your message and wants to remove or rename fields.
+//
+// Use fixed64 for JobId_t, GID_t, or SteamID.  This is appropriate for any field that is normally
+// going to be larger than 2^56.  Otherwise use int64 for 64 bit values that are frequently smaller
+// than 2^56 as it will safe space on the wire in those cases.
+//
+// Similar to fixed64, use fixed32 for RTime32 or other 32 bit values that are frequently larger than
+// 2^28.  It will safe space in those cases, otherwise use int32 which will safe space for smaller values.
+// An exception to this rule for RTime32 is if the value will frequently be zero rather than set to an actual 
+// time.
+//
+
+/// Control message ID.
+enum ESteamDatagramMsgID
+{
+	k_ESteamDatagramMsg_Invalid = 0;						// Reserved
+	k_ESteamDatagramMsg_RouterPingRequest = 1;				// Client -> Router
+	k_ESteamDatagramMsg_RouterPingReply = 2;				// Router -> Client
+	k_ESteamDatagramMsg_GameserverPingRequest = 3;			// Router -> Server
+	k_ESteamDatagramMsg_GameserverPingReply = 4;			// Server -> Router -> Client
+	k_ESteamDatagramMsg_GameserverSessionRequest = 5;		// Client -> Router
+	k_ESteamDatagramMsg_GameserverSessionEstablished = 6;	// Router -> Client
+	k_ESteamDatagramMsg_NoSession = 7;						// Router -> Server, Router -> Client
+	k_ESteamDatagramMsg_Diagnostic = 8;						// Diagnostic / status message Router -> Client
+	k_ESteamDatagramMsg_DataClientToRouter = 9;				// Client -> Router
+	k_ESteamDatagramMsg_DataRouterToServer = 10;			// Router -> Server
+	k_ESteamDatagramMsg_DataServerToRouter = 11;			// Server -> Router
+	k_ESteamDatagramMsg_DataRouterToClient = 12;			// Server -> Router
+	k_ESteamDatagramMsg_Stats = 13;							// Any -> Any
+	k_ESteamDatagramMsg_ClientPingSampleRequest = 14;		// Router->client
+	k_ESteamDatagramMsg_ClientPingSampleReply = 15;			// Client->router
+	k_ESteamDatagramMsg_ClientToRouterSwitchedPrimary = 16;	// Client->router
+	k_ESteamDatagramMsg_RelayHealth = 17;					// router->router
+	k_ESteamDatagramMsg_ConnectRequest = 18;				// Client->router->server
+	k_ESteamDatagramMsg_ConnectOK = 19;						// Server->router->client.
+	k_ESteamDatagramMsg_ConnectionClosed = 20;				// Server<->router<->client.  A reply is requested to this packet
+	k_ESteamDatagramMsg_NoConnection = 21;					// Server<->router<->client.  A reply should never be sent to this packet
+	k_ESteamDatagramMsg_RelayToRelayPingRequest = 22;		// Relay<->Relay.  Measure latency between relays
+	k_ESteamDatagramMsg_RelayToRelayPingReply = 23;			// Relay<->Relay.  ... reply
+	k_ESteamDatagramMsg_P2PSessionRequest = 24;				// Client->Relay Request a P2P session
+	k_ESteamDatagramMsg_P2PSessionEstablished = 25;			// Relay->Client Response
+	k_ESteamDatagramMsg_P2PStatsClient = 26;				// Client<->Relay
+	k_ESteamDatagramMsg_P2PStatsRelay = 27;					// Relay<->Relay
+	k_ESteamDatagramMsg_P2PBadRoute = 28;					// Relat->Relay, or Relay->Client
+};
+
+// k_ESteamDatagramMsg_RouterPingReply
+//
+// NOTE: The SDR code pre-serializes these and generally mucks with them at a low level.
+//       Don't change this without looking at the server code carefully.
+//
+message CMsgSteamDatagramRouterPingReply
+{
+	optional fixed32 client_timestamp = 1;						// The timestamp you gave me
+	repeated fixed32 latency_datacenter_ids = 2 [packed=true];	// List of service ID's I can route to.  (If route is not allowed, it won't be listed here.)
+	repeated uint32 latency_ping_ms = 3 [packed=true];			// Latency from this router to the corresponding service ID.  (Parallel with latency_datacenter_ids)
+	optional fixed32 your_public_ip = 4;						// The IP address I received this packet from.  Used to secure / check proof-of-work and auth ticket.
+	optional fixed32 server_time = 5;							// Current wall clock time according to me.  Used for proof-of-work and auth ticket.
+	optional fixed64 challenge = 6;								// Challenge value.  If you want a session, you'll need to reply with this guy, and the wall clock time I just gave you
+	optional uint32 seconds_until_shutdown = 7;					// We're replying to your query so you will have the requested data, and so you don't have to time us out, but we're going down soon, so you shouldn't ask for a session.
+	optional fixed32 client_cookie = 8;							// The challenge that the client sent.
+
+	// Global scoring penalty value for the entire relay cluster, no
+	// matter what data center we want to talk to.
+	optional uint32 scoring_penalty_relay_cluster = 9;
+
+	// Assume that the route to each data center will go over our
+	// backbone and there is no unusual congestion, except for data
+	// centers listed here
+	message RouteException
+	{
+		optional fixed32 data_center_id = 1;
+		optional uint32 flags = 2;
+		optional uint32 penalty = 3;
+	};
+	repeated RouteException route_exceptions = 10;
+};
+
+// Session keys used in key exchange
+message CMsgSteamDatagramSessionCryptInfo
+{
+
+	// Key used for Diffie–Hellman key exchange.  Typically this should be an
+	// ephemeral key used only for this connection.
+	enum EKeyType
+	{
+		INVALID = 0;
+		CURVE25519 = 1;
+	};
+	optional EKeyType key_type = 1;
+	optional bytes key_data = 2;
+	optional fixed64 nonce = 3;
+	optional bool is_snp = 4; // Set when this connection is using SNP, must match in order for communication to proceed
+};
+
+// Session keys used in key exchange
+message CMsgSteamDatagramSessionCryptInfoSigned
+{
+	/// Serialized CMsgSteamDatagramSessionCryptInfo
+	optional bytes info = 1;
+
+	/// Signature of encryption_key_data generated using the public key
+	/// from the CMsgSteamDatagramCertificate.
+	optional bytes signature = 2;
+}
+
+// k_ESteamDatagramMsg_Diagnostic
+message	CMsgSteamDatagramDiagnostic
+{
+	optional uint32	severity = 1;							// Standard Steam emit levels: 1 = error, 2 = warning, 3 = info, 4 = verbose
+	optional string text = 2;								// Message text
+};
+
+/// Wire version of SteamDatagramLinkInstantaneousStats.
+/// We use integers to send this stuff so that most fields take
+/// 1 or 2 bytes, instead of always taking 4.
+message CMsgSteamDatagramLinkInstantaneousStats
+{
+	optional uint32 out_packets_per_sec_x10 = 1;
+	optional uint32 out_bytes_per_sec = 2;
+	optional uint32 in_packets_per_sec_x10 = 3;
+	optional uint32 in_bytes_per_sec = 4;
+	optional uint32 ping_ms = 5;
+	optional uint32 packets_dropped_pct = 6; // 0 ... 100
+	optional uint32 packets_weird_sequence_pct = 7; // 0 ... 100
+	optional uint32 peak_jitter_usec = 8;
+};
+
+/// Wire version of SteamDatagramLinkLifetimeStats
+message CMsgSteamDatagramLinkLifetimeStats
+{
+	//optional uint32 rms_ping_ms = 1;
+	//optional uint32 connection_age = 2;
+	optional uint64 packets_sent = 3;
+	optional uint64 kb_sent = 4;
+	optional uint64 packets_recv = 5;
+	optional uint64 kb_recv = 6;
+	optional uint64 packets_recv_sequenced = 7;
+	optional uint64 packets_recv_dropped = 8;
+	optional uint64 packets_recv_out_of_order = 9;
+	optional uint64 packets_recv_duplicate = 10;
+	optional uint64 packets_recv_lurch = 11;
+
+	/// Histogram of connection quality.  Here we count up the number
+	/// of connection quality measurement intervals (about 5 seconds)
+	/// that fell into each quality measurement.  Quality measurment
+	/// is the percentage of packets that were delivered, in order,
+	/// without being duplicated
+	optional uint32 quality_histogram_100 = 21; // This means everything was perfect.  Even if we delivered over 100 packets in the interval and we should round up to 100, we will use 99% instead.
+	optional uint32 quality_histogram_99 = 22; // 99%+
+	optional uint32 quality_histogram_97 = 23;
+	optional uint32 quality_histogram_95 = 24;
+	optional uint32 quality_histogram_90 = 25;
+	optional uint32 quality_histogram_75 = 26;
+	optional uint32 quality_histogram_50 = 27;
+	optional uint32 quality_histogram_1 = 28;
+	optional uint32 quality_histogram_dead = 29; // we received nothing during the interval; it looks like the connection dropped
+	optional uint32 quality_ntile_2nd = 30; // 2% of measurement intervals had quality <= N%
+	optional uint32 quality_ntile_5th = 31; // 5% of measurement intervals had quality <= N%
+	optional uint32 quality_ntile_25th = 32; // 25% of measurement intervals had quality <= N%
+	optional uint32 quality_ntile_50th = 33; // 50% of measurement intervals had quality <= N%
+
+	/// Distribution of ping times.  Basically we make sure we take a ping measurement
+	/// at a minimum interval, and then we build a distribution of all the samples.
+	/// Note that we don't take great care to ensure that the samples are taken
+	/// perfectly evenly, but they should be reasonably even.
+	optional uint32 ping_histogram_25 = 41; // 0..25
+	optional uint32 ping_histogram_50 = 42; // 26..50
+	optional uint32 ping_histogram_75 = 43; // 51..75
+	optional uint32 ping_histogram_100 = 44; // etc
+	optional uint32 ping_histogram_125 = 45;
+	optional uint32 ping_histogram_150 = 46;
+	optional uint32 ping_histogram_200 = 47;
+	optional uint32 ping_histogram_300 = 48;
+	optional uint32 ping_histogram_max = 49; // >300
+	optional uint32 ping_ntile_5th = 50; // 5% of ping samples were <= Nms
+	optional uint32 ping_ntile_50th = 51; // 50% of ping samples were <= Nms
+	optional uint32 ping_ntile_75th = 52; // 70% of ping samples were <= Nms
+	optional uint32 ping_ntile_95th = 53; // 95% of ping samples were <= Nms
+	optional uint32 ping_ntile_98th = 54; // 98% of ping samples were <= Nms
+
+	/// Jitter distribution.
+	optional uint32 jitter_histogram_negligible = 61; // <1ms
+	optional uint32 jitter_histogram_1 = 62; // 1..2
+	optional uint32 jitter_histogram_2 = 63; // 2..5
+	optional uint32 jitter_histogram_5 = 64; // 5..10
+	optional uint32 jitter_histogram_10 = 65; // 10..20
+	optional uint32 jitter_histogram_20 = 66; // 20+
+
+	/// Transmit speed
+	optional uint32 txspeed_max            = 67;
+
+	optional uint32 txspeed_histogram_16   = 68; // speed at kb/s
+	optional uint32 txspeed_histogram_32   = 69; 
+	optional uint32 txspeed_histogram_64   = 70;
+	optional uint32 txspeed_histogram_128  = 71;
+	optional uint32 txspeed_histogram_256  = 72;
+	optional uint32 txspeed_histogram_512  = 73;
+	optional uint32 txspeed_histogram_1024 = 74;
+	optional uint32 txspeed_histogram_max  = 75;
+
+	// distribution.  some might be -1, see above for why.
+	optional uint32 txspeed_ntile_5th  = 76; // 5% of transmit samples were <= n kb/s
+	optional uint32 txspeed_ntile_50th = 77; // 50% of transmit samples were <= n kb/s 
+	optional uint32 txspeed_ntile_75th = 78; // 70% of transmit samples were <= n kb/s 
+	optional uint32 txspeed_ntile_95th = 79; // 95% of transmit samples were <= n kb/s 
+	optional uint32 txspeed_ntile_98th = 80; // 98% of transmit samples were <= n kb/s 
+
+	//
+	// Receive speed
+	//
+	optional uint32 rxspeed_max = 81; // max speed we hit that formed the histogram
+
+	optional uint32 rxspeed_histogram_16 = 82; // speed at kb/s
+	optional uint32 rxspeed_histogram_32 = 83; 
+	optional uint32 rxspeed_histogram_64 = 84;
+	optional uint32 rxspeed_histogram_128 = 85;
+	optional uint32 rxspeed_histogram_256 = 86;
+	optional uint32 rxspeed_histogram_512 = 87;
+	optional uint32 rxspeed_histogram_1024 = 88;
+	optional uint32 rxspeed_histogram_max = 89;
+
+	// distribution.  some might be -1, see above for why.
+	optional uint32 rxspeed_ntile_5th = 90; // 5% of transmit samples were <= n kb/s
+	optional uint32 rxspeed_ntile_50th = 91; // 50% of transmit samples were <= n kb/s 
+	optional uint32 rxspeed_ntile_75th = 92; // 70% of transmit samples were <= n kb/s 
+	optional uint32 rxspeed_ntile_95th = 93; // 95% of transmit samples were <= n kb/s 
+	optional uint32 rxspeed_ntile_98th = 94; // 98% of transmit samples were <= n kb/s 
+};
+
+/// Message containing connection quality related messages
+/// (possibly inline with a data packet)
+message CMsgSteamDatagramConnectionQuality
+{
+	optional CMsgSteamDatagramLinkInstantaneousStats instantaneous = 1;
+	optional CMsgSteamDatagramLinkLifetimeStats lifetime = 2;
+	//optional uint32 seqnum_ack_lifetime = 3;
+};
+
+// Do not remove this comment due to a bug on the Mac OS X protobuf compiler
+

src/common/steamnetworkingsockets_messages_certs.proto

@@ -0,0 +1,110 @@
+//====== Copyright Valve Corporation, All rights reserved. ====================
+//
+// Wire format messages for Steam datagram transport
+//
+//=============================================================================
+syntax = "proto2";
+
+// Note about encoding:
+//	http://code.google.com/apis/protocolbuffers/docs/encoding.html
+//
+// TL;DR: Use sint32/sint64 for values that may be negative.
+//
+// There is an important difference between the signed int types (sint32 and sint64)
+// and the "standard" int types (int32 and int64) when it comes to encoding negative
+// numbers.  If you use int32 or int64 as the type for a negative number, the
+// resulting varint is always ten bytes long – it is, effectively, treated like a
+// very large unsigned integer.  If you use one of the signed types, the resulting
+// varint uses ZigZag encoding, which is much more efficient.
+
+
+// Commenting this out allows it to be compiled for SPEED or LITE_RUNTIME.
+// option optimize_for = SPEED;
+
+// We don't use the service generation functionality
+option cc_generic_services = false;
+
+
+// 
+// STYLE NOTES:
+//
+// Use CamelCase CMsgMyMessageName style names for messages.
+// 
+// Use lowercase _ delimited names like my_steam_id for field names, this is non-standard for Steam,
+// but plays nice with the Google formatted code generation.  
+// 
+// Try not to use required fields ever. Only do so if you are really really sure you'll never want them removed. 
+// Optional should be preffered as it will make versioning easier and cleaner in the future if someone refactors
+// your message and wants to remove or rename fields.
+//
+// Use fixed64 for JobId_t, GID_t, or SteamID.  This is appropriate for any field that is normally
+// going to be larger than 2^56.  Otherwise use int64 for 64 bit values that are frequently smaller
+// than 2^56 as it will safe space on the wire in those cases.
+//
+// Similar to fixed64, use fixed32 for RTime32 or other 32 bit values that are frequently larger than
+// 2^28.  It will safe space in those cases, otherwise use int32 which will safe space for smaller values.
+// An exception to this rule for RTime32 is if the value will frequently be zero rather than set to an actual 
+// time.
+//
+
+// A public key used for crypto key exchange and identity.
+// This is basically the portion of a certificate over which
+// the signature is generated.  (It is broken into a separate
+// message to make it easy to keep the exact bytes that were
+// signed intact during transport.)
+message CMsgSteamDatagramCertificate
+{
+	enum EKeyType
+	{
+		INVALID = 0;
+		ED25519 = 1;
+	};
+	optional EKeyType key_type = 1;
+	optional bytes key_data = 2;
+
+	//
+	// Who is allowed to use this key?  This is the set of people who we assume
+	// will have access to the corresponding private key.
+	//
+
+	// Single user key?  This might not be set if the key is shared!
+	optional fixed64 steam_id = 4;
+
+	// Allow any server in particular data centers to use it?
+	repeated fixed32 gameserver_datacenter_ids = 5;
+
+	//
+	// Key restrictions
+	//
+
+	// Restricted time range?
+	optional fixed32 time_created = 8;
+	optional fixed32 time_expiry = 9;
+
+	// Restrict key to be used for a particular App ID?
+	optional uint32 app_id = 10;
+};
+
+// Certificate signed by a certificate authority.
+message CMsgSteamDatagramCertificateSigned
+{
+	// The public key associated with my identity.  This is a longer standing key
+	// that can be used for multiple connections.  It's a serialized
+	// version of CMsgSteamDatagramCertificate, but because the signature
+	// is based on a particular serialization of that message, we keep the
+	// original serialization here.
+	optional bytes cert = 4;
+
+	/// The key that was used by the certificate authority to sign
+	/// my public key.  This might be empty if the key is unsigned.
+	// (It's up to the endpoint to decide if they want to accept that
+	// or not.)
+	optional fixed64 ca_key_id = 5;
+
+	/// Signature over the certificate, using the key identified
+	/// by ca_key_id.
+	optional bytes ca_signature = 6;
+}
+
+// Do not remove this comment due to a bug on the Mac OS X protobuf compiler
+

src/common/steamnetworkingsockets_messages_udp.proto

@@ -0,0 +1,185 @@
+//====== Copyright Valve Corporation, All rights reserved. ====================
+//
+// Wire format messages for Steam datagram transport
+//
+//=============================================================================
+syntax = "proto2";
+
+// Note about encoding:
+//	http://code.google.com/apis/protocolbuffers/docs/encoding.html
+//
+// TL;DR: Use sint32/sint64 for values that may be negative.
+//
+// There is an important difference between the signed int types (sint32 and sint64)
+// and the "standard" int types (int32 and int64) when it comes to encoding negative
+// numbers.  If you use int32 or int64 as the type for a negative number, the
+// resulting varint is always ten bytes long – it is, effectively, treated like a
+// very large unsigned integer.  If you use one of the signed types, the resulting
+// varint uses ZigZag encoding, which is much more efficient.
+
+
+// Commenting this out allows it to be compiled for SPEED or LITE_RUNTIME.
+// option optimize_for = SPEED;
+
+// We don't use the service generation functionality
+option cc_generic_services = false;
+
+import "steamnetworkingsockets_messages_certs.proto";
+import "steamnetworkingsockets_messages.proto";
+
+
+// 
+// STYLE NOTES:
+//
+// Use CamelCase CMsgMyMessageName style names for messages.
+// 
+// Use lowercase _ delimited names like my_steam_id for field names, this is non-standard for Steam,
+// but plays nice with the Google formatted code generation.  
+// 
+// Try not to use required fields ever. Only do so if you are really really sure you'll never want them removed. 
+// Optional should be preffered as it will make versioning easier and cleaner in the future if someone refactors
+// your message and wants to remove or rename fields.
+//
+// Use fixed64 for JobId_t, GID_t, or SteamID.  This is appropriate for any field that is normally
+// going to be larger than 2^56.  Otherwise use int64 for 64 bit values that are frequently smaller
+// than 2^56 as it will safe space on the wire in those cases.
+//
+// Similar to fixed64, use fixed32 for RTime32 or other 32 bit values that are frequently larger than
+// 2^28.  It will safe space in those cases, otherwise use int32 which will safe space for smaller values.
+// An exception to this rule for RTime32 is if the value will frequently be zero rather than set to an actual 
+// time.
+//
+
+/// Control message ID.
+enum ESteamNetworkingUDPMsgID
+{
+	// Steam networking using direct UDP connect
+	k_ESteamNetworkingUDPMsg_ChallengeRequest = 32;			// Client->server
+	k_ESteamNetworkingUDPMsg_ChallengeReply = 33;			// Server->client
+	k_ESteamNetworkingUDPMsg_ConnectRequest = 34;			// Client->server
+	k_ESteamNetworkingUDPMsg_ConnectOK = 35;				// Server->client
+	k_ESteamNetworkingUDPMsg_ConnectionClosed = 36;			// Client<->server.  A reply is requested to this packet
+	k_ESteamNetworkingUDPMsg_NoConnection = 37;				// Client<->server.  A reply should never be sent to this packet
+	k_ESteamNetworkingUDPMsg_Stats = 38;					// Client<->server.  Standalone stats message
+};
+
+// k_ESteamNetworkingUDPMsg_ChallengeRequest
+message CMsgSteamSockets_UDP_ChallengeRequest
+{
+	optional fixed32 connection_id = 1;
+	//optional fixed64 client_steam_id = 2;
+	optional fixed64 my_timestamp = 3; // Please send this back to me
+
+	// Version of the code I'm running
+	optional uint32 protocol_version = 4;
+};
+
+// k_ESteamNetworkingUDPMsg_ChallengeReply
+message CMsgSteamSockets_UDP_ChallengeReply
+{
+	optional fixed32 connection_id = 1;
+	optional fixed64 challenge = 2;
+	//optional uint32 required_proof_of_work_bits = 3;
+	optional fixed64 your_timestamp = 3; // the my_timestamp you sent to us in ChallengeRequest
+
+	// Version of the code I'm running
+	optional uint32 protocol_version = 4;
+};
+
+// k_ESteamNetworkingUDPMsg_ConnectRequest
+message CMsgSteamSockets_UDP_ConnectRequest
+{
+	optional fixed32 client_connection_id = 1;
+	optional fixed64 challenge = 2;
+	optional fixed64 client_steam_id = 3;
+	//optional fixed64 proof_of_work = 4;
+	optional fixed64 my_timestamp = 5; // Please send this back to me
+	optional uint32 ping_est_ms = 6; // My estimate of the ping time
+
+	/// My ephemeral keys, and any crypto parameter negotiation.
+	optional CMsgSteamDatagramSessionCryptInfoSigned crypt = 7;
+
+	/// Certificate used to prove my identity
+	optional CMsgSteamDatagramCertificateSigned cert = 4;
+
+	// Version of the code I'm running
+	optional uint32 protocol_version = 8;
+};
+
+// k_ESteamDatagramMsg_UDP_ConnectOK
+message CMsgSteamSockets_UDP_ConnectOK
+{
+	optional fixed32 client_connection_id = 1;
+	optional fixed32 server_connection_id = 5;
+	optional fixed64 server_steam_id = 2;
+	optional fixed64 your_timestamp = 3; // the timestamp (or whatever) you send to us in ConnectRequest
+	optional uint32 delay_time_usec = 4; // number of microseconds between when we received your request and we replied
+
+	/// My ephemeral keys, and any crypto parameter negotiation.
+	optional CMsgSteamDatagramSessionCryptInfoSigned crypt = 7;
+
+	/// Certificate used to prove my identity
+	optional CMsgSteamDatagramCertificateSigned cert = 8;
+
+	// Version of the code I'm running
+	optional uint32 protocol_version = 9;
+};
+
+// k_ESteamDatagramMsg_UDP_ConnectionClosed
+message CMsgSteamSockets_UDP_ConnectionClosed
+{
+	//optional fixed32 legacy_client_connection_id = 1;
+	optional fixed32 to_connection_id = 4;
+	optional fixed32 from_connection_id = 5;
+	optional string debug = 2;
+	optional uint32 reason_code = 3;
+};
+
+// k_ESteamDatagramMsg_UDP_NoConnection
+message CMsgSteamSockets_UDP_NoConnection
+{
+	//optional fixed32 legacy_client_connection_id = 1; // The client-side connection ID
+	optional fixed32 from_connection_id = 2; // "My" portion of the connection ID you tried to use (always present), but that connection doesn't exist or has been closed.
+	optional fixed32 to_connection_id = 3; // Your portion of the connection ID you sent (if any)
+};
+
+message CMsgSteamSockets_UDP_Stats
+{
+	// End to end stats
+	optional CMsgSteamDatagramConnectionQuality stats = 1;
+
+	/// If acks are reasonably rare compared to outgoing data packets,
+	/// we will usually be able to fit an ack in the header of a data packet.
+	/// If we need to send multiple acks, or a standalong stats message,
+	/// we can put them here.
+	///
+	/// Intentionally not array packed, since having more than one is actually
+	/// rare and sending a single value "packed" takes more bytes.
+	/// Upper 16 bits is the sequence number, lower is the delay
+	///
+	/// Note that we really need to integrate this better with the SNP acks/nacks.
+	repeated fixed32 ack_e2e = 2;
+
+	enum Flags
+	{
+		//ACK_REQUEST_RELAY = 1; // Reserved
+		ACK_REQUEST_E2E = 2;
+		ACK_REQUEST_IMMEDIATE = 4;
+	};
+
+	/// Additional flags.  Should we try to put these in the
+	/// message header and save a few bytes?
+	optional uint32 flags = 3;
+
+	//
+	// Envelope data.  Not present if the message is
+	// inline in a data message
+	//
+	//optional fixed32 legacy_client_connection_id = 8;
+	optional fixed32 to_connection_id = 9;
+	optional fixed32 from_connection_id = 10;
+	optional uint32 seq_num = 4;
+};
+
+// Do not remove this comment due to a bug on the Mac OS X protobuf compiler
+

src/external/curve25519-donna/README.md

@@ -0,0 +1,107 @@
+[curve25519](http://cr.yp.to/ecdh.html) is an elliptic curve, developed by 
+[Dan Bernstein](http://cr.yp.to/djb.html), for fast 
+[Diffie-Hellman](http://en.wikipedia.org/wiki/Diffie-Hellman) key agreement. 
+DJB's [original implementation](http://cr.yp.to/ecdh.html) was written in a 
+language of his own devising called [qhasm](http://cr.yp.to/qhasm.html). 
+The original qhasm source isn't available, only the x86 32-bit assembly output.
+
+This project provides performant, portable 32-bit & 64-bit implementations. 
+All implementations are of course constant time in regard to secret data.
+
+#### Performance 
+
+Compilers versions are gcc 4.6.3, icc 13.1.1, clang 3.4-1~exp1.
+
+Counts are in thousands of cycles.
+
+Note that SSE2 performance may be less impressive on AMD & older CPUs with slower SSE ops!
+
+##### E5200 @ 2.5ghz, march=core2
+
+<table>
+<thead><tr><th>Version</th><th>gcc</th><th>icc</th><th>clang</th></tr></thead>
+<tbody>
+<tr><td>64-bit SSE2  </td><td>  278k</td><td>  265k</td><td>  302k</td></tr>
+<tr><td>64-bit       </td><td>  273k</td><td>  271k</td><td>  377k</td></tr>
+<tr><td>32-bit SSE2  </td><td>  304k</td><td>  289k</td><td>  317k</td></tr>
+<tr><td>32-bit       </td><td> 1417k</td><td>  845k</td><td>  981k</td></tr>
+</tbody>
+</table>
+
+##### E3-1270 @ 3.4ghz, march=corei7-avx
+
+<table>
+<thead><tr><th>Version</th><th>gcc</th><th>icc</th><th>clang</th></tr></thead>
+<tbody>
+<tr><td>64-bit       </td><td>  201k</td><td>  192k</td><td>  233k</td></tr>
+<tr><td>64-bit SSE2  </td><td>  201k</td><td>  201k</td><td>  261k</td></tr>
+<tr><td>32-bit SSE2  </td><td>  238k</td><td>  225k</td><td>  250k</td></tr>
+<tr><td>32-bit       </td><td> 1293k</td><td>  822k</td><td>  848k</td></tr>
+</tbody>
+</table>
+
+#### Compilation
+
+No configuration is needed.
+
+##### 32-bit
+
+	gcc curve25519.c -m32 -O3 -c
+
+##### 64-bit
+
+	gcc curve25519.c -m64 -O3 -c
+
+##### SSE2
+
+	gcc curve25519.c -m32 -O3 -c -DCURVE25519_SSE2 -msse2
+	gcc curve25519.c -m64 -O3 -c -DCURVE25519_SSE2
+
+clang, icc, and msvc are also supported
+
+##### Named Versions
+
+Define CURVE25519_SUFFIX to append a suffix to public functions, e.g. 
+`-DCURVE25519_SUFFIX=_sse2` to create curve25519_donna_sse2 and 
+curve25519_donna_basepoint_sse2.
+
+#### Usage
+
+To use the code, link against `curve25519.o` and:
+
+	#include "curve25519.h"
+
+To generate a private/secret key, generate 32 cryptographically random bytes: 
+
+	curve25519_key sk;
+	randombytes(sk, sizeof(curve25519_key));
+
+Manual clamping is not needed, and it is actually not possible to use unclamped
+keys due to the code taking advantage of the clamped bits internally.
+
+To generate the public key from the private/secret key:
+
+	curve25519_key pk;
+	curve25519_donna_basepoint(pk, sk);
+
+To generate a shared key with your private/secret key and someone elses public key:
+
+	curve25519_key shared;
+	curve25519_donna(shared, mysk, yourpk);
+
+And hash `shared` with a cryptographic hash before using, or e.g. pass `shared` through
+HSalsa20/HChacha as NaCl does.
+
+#### Testing
+
+Fuzzing against a reference implemenation is now available. See [fuzz/README](fuzz/README.md).
+
+Building `curve25519.c` and linking with `test.c` will run basic sanity tests and benchmark curve25519_donna.
+
+#### Papers
+
+[djb's curve25519 paper](http://cr.yp.to/ecdh/curve25519-20060209.pdf)
+
+#### License
+
+Public Domain, or MIT

src/external/curve25519-donna/curve25519-donna-32bit.h

@@ -0,0 +1,466 @@
+typedef uint32_t bignum25519[10];
+
+static const uint32_t reduce_mask_26 = (1 << 26) - 1;
+static const uint32_t reduce_mask_25 = (1 << 25) - 1;
+
+/* out = in */
+DONNA_INLINE static void
+curve25519_copy(bignum25519 out, const bignum25519 in) {
+	out[0] = in[0];
+	out[1] = in[1];
+	out[2] = in[2];
+	out[3] = in[3];
+	out[4] = in[4];
+	out[5] = in[5];
+	out[6] = in[6];
+	out[7] = in[7];
+	out[8] = in[8];
+	out[9] = in[9];
+}
+
+/* out = a + b */
+DONNA_INLINE static void
+curve25519_add(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + b[0];
+	out[1] = a[1] + b[1];
+	out[2] = a[2] + b[2];
+	out[3] = a[3] + b[3];
+	out[4] = a[4] + b[4];
+	out[5] = a[5] + b[5];
+	out[6] = a[6] + b[6];
+	out[7] = a[7] + b[7];
+	out[8] = a[8] + b[8];
+	out[9] = a[9] + b[9];
+}
+
+/* out = a - b */
+DONNA_INLINE static void
+curve25519_sub(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t c;
+	out[0] = 0x7ffffda + a[0] - b[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = 0x3fffffe + a[1] - b[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = 0x7fffffe + a[2] - b[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = 0x3fffffe + a[3] - b[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = 0x7fffffe + a[4] - b[4] + c; c = (out[4] >> 26); out[4] &= reduce_mask_26;
+	out[5] = 0x3fffffe + a[5] - b[5] + c; c = (out[5] >> 25); out[5] &= reduce_mask_25;
+	out[6] = 0x7fffffe + a[6] - b[6] + c; c = (out[6] >> 26); out[6] &= reduce_mask_26;
+	out[7] = 0x3fffffe + a[7] - b[7] + c; c = (out[7] >> 25); out[7] &= reduce_mask_25;
+	out[8] = 0x7fffffe + a[8] - b[8] + c; c = (out[8] >> 26); out[8] &= reduce_mask_26;
+	out[9] = 0x3fffffe + a[9] - b[9] + c; c = (out[9] >> 25); out[9] &= reduce_mask_25;
+	out[0] += 19 * c;
+}
+
+/* out = in * scalar */
+DONNA_INLINE static void
+curve25519_scalar_product(bignum25519 out, const bignum25519 in, const uint32_t scalar) {
+	uint64_t a;
+	uint32_t c;
+	a = mul32x32_64(in[0], scalar);     out[0] = (uint32_t)a & reduce_mask_26; c = (uint32_t)(a >> 26);
+	a = mul32x32_64(in[1], scalar) + c; out[1] = (uint32_t)a & reduce_mask_25; c = (uint32_t)(a >> 25);
+	a = mul32x32_64(in[2], scalar) + c; out[2] = (uint32_t)a & reduce_mask_26; c = (uint32_t)(a >> 26);
+	a = mul32x32_64(in[3], scalar) + c; out[3] = (uint32_t)a & reduce_mask_25; c = (uint32_t)(a >> 25);
+	a = mul32x32_64(in[4], scalar) + c; out[4] = (uint32_t)a & reduce_mask_26; c = (uint32_t)(a >> 26);
+	a = mul32x32_64(in[5], scalar) + c; out[5] = (uint32_t)a & reduce_mask_25; c = (uint32_t)(a >> 25);
+	a = mul32x32_64(in[6], scalar) + c; out[6] = (uint32_t)a & reduce_mask_26; c = (uint32_t)(a >> 26);
+	a = mul32x32_64(in[7], scalar) + c; out[7] = (uint32_t)a & reduce_mask_25; c = (uint32_t)(a >> 25);
+	a = mul32x32_64(in[8], scalar) + c; out[8] = (uint32_t)a & reduce_mask_26; c = (uint32_t)(a >> 26);
+	a = mul32x32_64(in[9], scalar) + c; out[9] = (uint32_t)a & reduce_mask_25; c = (uint32_t)(a >> 25);
+	                                    out[0] += c * 19;
+}
+
+/* out = a * b */
+DONNA_INLINE static void
+curve25519_mul(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t r0,r1,r2,r3,r4,r5,r6,r7,r8,r9;
+	uint32_t s0,s1,s2,s3,s4,s5,s6,s7,s8,s9;
+	uint64_t m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,c;
+	uint32_t p;
+
+	r0 = b[0];
+	r1 = b[1];
+	r2 = b[2];
+	r3 = b[3];
+	r4 = b[4];
+	r5 = b[5];
+	r6 = b[6];
+	r7 = b[7];
+	r8 = b[8];
+	r9 = b[9];
+
+	s0 = a[0];
+	s1 = a[1];
+	s2 = a[2];
+	s3 = a[3];
+	s4 = a[4];
+	s5 = a[5];
+	s6 = a[6];
+	s7 = a[7];
+	s8 = a[8];
+	s9 = a[9];
+
+	m1 = mul32x32_64(r0, s1) + mul32x32_64(r1, s0);
+	m3 = mul32x32_64(r0, s3) + mul32x32_64(r1, s2) + mul32x32_64(r2, s1) + mul32x32_64(r3, s0);
+	m5 = mul32x32_64(r0, s5) + mul32x32_64(r1, s4) + mul32x32_64(r2, s3) + mul32x32_64(r3, s2) + mul32x32_64(r4, s1) + mul32x32_64(r5, s0);
+	m7 = mul32x32_64(r0, s7) + mul32x32_64(r1, s6) + mul32x32_64(r2, s5) + mul32x32_64(r3, s4) + mul32x32_64(r4, s3) + mul32x32_64(r5, s2) + mul32x32_64(r6, s1) + mul32x32_64(r7, s0);
+	m9 = mul32x32_64(r0, s9) + mul32x32_64(r1, s8) + mul32x32_64(r2, s7) + mul32x32_64(r3, s6) + mul32x32_64(r4, s5) + mul32x32_64(r5, s4) + mul32x32_64(r6, s3) + mul32x32_64(r7, s2) + mul32x32_64(r8, s1) + mul32x32_64(r9, s0);
+
+	r1 *= 2;
+	r3 *= 2;
+	r5 *= 2;
+	r7 *= 2;
+
+	m0 = mul32x32_64(r0, s0);
+	m2 = mul32x32_64(r0, s2) + mul32x32_64(r1, s1) + mul32x32_64(r2, s0);
+	m4 = mul32x32_64(r0, s4) + mul32x32_64(r1, s3) + mul32x32_64(r2, s2) + mul32x32_64(r3, s1) + mul32x32_64(r4, s0);
+	m6 = mul32x32_64(r0, s6) + mul32x32_64(r1, s5) + mul32x32_64(r2, s4) + mul32x32_64(r3, s3) + mul32x32_64(r4, s2) + mul32x32_64(r5, s1) + mul32x32_64(r6, s0);
+	m8 = mul32x32_64(r0, s8) + mul32x32_64(r1, s7) + mul32x32_64(r2, s6) + mul32x32_64(r3, s5) + mul32x32_64(r4, s4) + mul32x32_64(r5, s3) + mul32x32_64(r6, s2) + mul32x32_64(r7, s1) + mul32x32_64(r8, s0);
+
+	r1 *= 19;
+	r2 *= 19;
+	r3 = (r3 / 2) * 19;
+	r4 *= 19;
+	r5 = (r5 / 2) * 19;
+	r6 *= 19;
+	r7 = (r7 / 2) * 19;
+	r8 *= 19;
+	r9 *= 19;
+
+	m1 += (mul32x32_64(r9, s2) + mul32x32_64(r8, s3) + mul32x32_64(r7, s4) + mul32x32_64(r6, s5) + mul32x32_64(r5, s6) + mul32x32_64(r4, s7) + mul32x32_64(r3, s8) + mul32x32_64(r2, s9));
+	m3 += (mul32x32_64(r9, s4) + mul32x32_64(r8, s5) + mul32x32_64(r7, s6) + mul32x32_64(r6, s7) + mul32x32_64(r5, s8) + mul32x32_64(r4, s9));
+	m5 += (mul32x32_64(r9, s6) + mul32x32_64(r8, s7) + mul32x32_64(r7, s8) + mul32x32_64(r6, s9));
+	m7 += (mul32x32_64(r9, s8) + mul32x32_64(r8, s9));
+
+	r3 *= 2;
+	r5 *= 2;
+	r7 *= 2;
+	r9 *= 2;
+
+	m0 += (mul32x32_64(r9, s1) + mul32x32_64(r8, s2) + mul32x32_64(r7, s3) + mul32x32_64(r6, s4) + mul32x32_64(r5, s5) + mul32x32_64(r4, s6) + mul32x32_64(r3, s7) + mul32x32_64(r2, s8) + mul32x32_64(r1, s9));
+	m2 += (mul32x32_64(r9, s3) + mul32x32_64(r8, s4) + mul32x32_64(r7, s5) + mul32x32_64(r6, s6) + mul32x32_64(r5, s7) + mul32x32_64(r4, s8) + mul32x32_64(r3, s9));
+	m4 += (mul32x32_64(r9, s5) + mul32x32_64(r8, s6) + mul32x32_64(r7, s7) + mul32x32_64(r6, s8) + mul32x32_64(r5, s9));
+	m6 += (mul32x32_64(r9, s7) + mul32x32_64(r8, s8) + mul32x32_64(r7, s9));
+	m8 += (mul32x32_64(r9, s9));
+
+	                             r0 = (uint32_t)m0 & reduce_mask_26; c = (m0 >> 26);
+	m1 += c;                     r1 = (uint32_t)m1 & reduce_mask_25; c = (m1 >> 25);
+	m2 += c;                     r2 = (uint32_t)m2 & reduce_mask_26; c = (m2 >> 26);
+	m3 += c;                     r3 = (uint32_t)m3 & reduce_mask_25; c = (m3 >> 25);
+	m4 += c;                     r4 = (uint32_t)m4 & reduce_mask_26; c = (m4 >> 26);
+	m5 += c;                     r5 = (uint32_t)m5 & reduce_mask_25; c = (m5 >> 25);
+	m6 += c;                     r6 = (uint32_t)m6 & reduce_mask_26; c = (m6 >> 26);
+	m7 += c;                     r7 = (uint32_t)m7 & reduce_mask_25; c = (m7 >> 25);
+	m8 += c;                     r8 = (uint32_t)m8 & reduce_mask_26; c = (m8 >> 26);
+	m9 += c;                     r9 = (uint32_t)m9 & reduce_mask_25; p = (uint32_t)(m9 >> 25);
+	m0 = r0 + mul32x32_64(p,19); r0 = (uint32_t)m0 & reduce_mask_26; p = (uint32_t)(m0 >> 26);
+	r1 += p;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+	out[5] = r5;
+	out[6] = r6;
+	out[7] = r7;
+	out[8] = r8;
+	out[9] = r9;
+}
+
+/* out = in * in */
+DONNA_INLINE static void
+curve25519_square(bignum25519 out, const bignum25519 in) {
+	uint32_t r0,r1,r2,r3,r4,r5,r6,r7,r8,r9;
+	uint32_t d6,d7,d8,d9;
+	uint64_t m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,c;
+	uint32_t p;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+	r5 = in[5];
+	r6 = in[6];
+	r7 = in[7];
+	r8 = in[8];
+	r9 = in[9];
+
+
+	m0 = mul32x32_64(r0, r0);
+	r0 *= 2;
+	m1 = mul32x32_64(r0, r1);
+	m2 = mul32x32_64(r0, r2) + mul32x32_64(r1, r1 * 2);
+	r1 *= 2;
+	m3 = mul32x32_64(r0, r3) + mul32x32_64(r1, r2    );
+	m4 = mul32x32_64(r0, r4) + mul32x32_64(r1, r3 * 2) + mul32x32_64(r2, r2);
+	r2 *= 2;
+	m5 = mul32x32_64(r0, r5) + mul32x32_64(r1, r4    ) + mul32x32_64(r2, r3);
+	m6 = mul32x32_64(r0, r6) + mul32x32_64(r1, r5 * 2) + mul32x32_64(r2, r4) + mul32x32_64(r3, r3 * 2);
+	r3 *= 2;
+	m7 = mul32x32_64(r0, r7) + mul32x32_64(r1, r6    ) + mul32x32_64(r2, r5) + mul32x32_64(r3, r4    );
+	m8 = mul32x32_64(r0, r8) + mul32x32_64(r1, r7 * 2) + mul32x32_64(r2, r6) + mul32x32_64(r3, r5 * 2) + mul32x32_64(r4, r4    );
+	m9 = mul32x32_64(r0, r9) + mul32x32_64(r1, r8    ) + mul32x32_64(r2, r7) + mul32x32_64(r3, r6    ) + mul32x32_64(r4, r5 * 2);
+
+	d6 = r6 * 19;
+	d7 = r7 * 2 * 19;
+	d8 = r8 * 19;
+	d9 = r9 * 2 * 19;
+
+	m0 += (mul32x32_64(d9, r1    ) + mul32x32_64(d8, r2    ) + mul32x32_64(d7, r3    ) + mul32x32_64(d6, r4 * 2) + mul32x32_64(r5, r5 * 2 * 19));
+	m1 += (mul32x32_64(d9, r2 / 2) + mul32x32_64(d8, r3    ) + mul32x32_64(d7, r4    ) + mul32x32_64(d6, r5 * 2));
+	m2 += (mul32x32_64(d9, r3    ) + mul32x32_64(d8, r4 * 2) + mul32x32_64(d7, r5 * 2) + mul32x32_64(d6, r6    ));
+	m3 += (mul32x32_64(d9, r4    ) + mul32x32_64(d8, r5 * 2) + mul32x32_64(d7, r6    ));
+	m4 += (mul32x32_64(d9, r5 * 2) + mul32x32_64(d8, r6 * 2) + mul32x32_64(d7, r7    ));
+	m5 += (mul32x32_64(d9, r6    ) + mul32x32_64(d8, r7 * 2));
+	m6 += (mul32x32_64(d9, r7 * 2) + mul32x32_64(d8, r8    ));
+	m7 += (mul32x32_64(d9, r8    ));
+	m8 += (mul32x32_64(d9, r9    ));
+
+	                             r0 = (uint32_t)m0 & reduce_mask_26; c = (m0 >> 26);
+	m1 += c;                     r1 = (uint32_t)m1 & reduce_mask_25; c = (m1 >> 25);
+	m2 += c;                     r2 = (uint32_t)m2 & reduce_mask_26; c = (m2 >> 26);
+	m3 += c;                     r3 = (uint32_t)m3 & reduce_mask_25; c = (m3 >> 25);
+	m4 += c;                     r4 = (uint32_t)m4 & reduce_mask_26; c = (m4 >> 26);
+	m5 += c;                     r5 = (uint32_t)m5 & reduce_mask_25; c = (m5 >> 25);
+	m6 += c;                     r6 = (uint32_t)m6 & reduce_mask_26; c = (m6 >> 26);
+	m7 += c;                     r7 = (uint32_t)m7 & reduce_mask_25; c = (m7 >> 25);
+	m8 += c;                     r8 = (uint32_t)m8 & reduce_mask_26; c = (m8 >> 26);
+	m9 += c;                     r9 = (uint32_t)m9 & reduce_mask_25; p = (uint32_t)(m9 >> 25);
+	m0 = r0 + mul32x32_64(p,19); r0 = (uint32_t)m0 & reduce_mask_26; p = (uint32_t)(m0 >> 26);
+	r1 += p;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+	out[5] = r5;
+	out[6] = r6;
+	out[7] = r7;
+	out[8] = r8;
+	out[9] = r9;
+}
+
+/* out = in^(2 * count) */
+static void
+curve25519_square_times(bignum25519 out, const bignum25519 in, int count) {
+	uint32_t r0,r1,r2,r3,r4,r5,r6,r7,r8,r9;
+	uint32_t d6,d7,d8,d9;
+	uint64_t m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,c;
+	uint32_t p;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+	r5 = in[5];
+	r6 = in[6];
+	r7 = in[7];
+	r8 = in[8];
+	r9 = in[9];
+
+	do {
+		m0 = mul32x32_64(r0, r0);
+		r0 *= 2;
+		m1 = mul32x32_64(r0, r1);
+		m2 = mul32x32_64(r0, r2) + mul32x32_64(r1, r1 * 2);
+		r1 *= 2;
+		m3 = mul32x32_64(r0, r3) + mul32x32_64(r1, r2    );
+		m4 = mul32x32_64(r0, r4) + mul32x32_64(r1, r3 * 2) + mul32x32_64(r2, r2);
+		r2 *= 2;
+		m5 = mul32x32_64(r0, r5) + mul32x32_64(r1, r4    ) + mul32x32_64(r2, r3);
+		m6 = mul32x32_64(r0, r6) + mul32x32_64(r1, r5 * 2) + mul32x32_64(r2, r4) + mul32x32_64(r3, r3 * 2);
+		r3 *= 2;
+		m7 = mul32x32_64(r0, r7) + mul32x32_64(r1, r6    ) + mul32x32_64(r2, r5) + mul32x32_64(r3, r4    );
+		m8 = mul32x32_64(r0, r8) + mul32x32_64(r1, r7 * 2) + mul32x32_64(r2, r6) + mul32x32_64(r3, r5 * 2) + mul32x32_64(r4, r4    );
+		m9 = mul32x32_64(r0, r9) + mul32x32_64(r1, r8    ) + mul32x32_64(r2, r7) + mul32x32_64(r3, r6    ) + mul32x32_64(r4, r5 * 2);
+
+		d6 = r6 * 19;
+		d7 = r7 * 2 * 19;
+		d8 = r8 * 19;
+		d9 = r9 * 2 * 19;
+
+		m0 += (mul32x32_64(d9, r1    ) + mul32x32_64(d8, r2    ) + mul32x32_64(d7, r3    ) + mul32x32_64(d6, r4 * 2) + mul32x32_64(r5, r5 * 2 * 19));
+		m1 += (mul32x32_64(d9, r2 / 2) + mul32x32_64(d8, r3    ) + mul32x32_64(d7, r4    ) + mul32x32_64(d6, r5 * 2));
+		m2 += (mul32x32_64(d9, r3    ) + mul32x32_64(d8, r4 * 2) + mul32x32_64(d7, r5 * 2) + mul32x32_64(d6, r6    ));
+		m3 += (mul32x32_64(d9, r4    ) + mul32x32_64(d8, r5 * 2) + mul32x32_64(d7, r6    ));
+		m4 += (mul32x32_64(d9, r5 * 2) + mul32x32_64(d8, r6 * 2) + mul32x32_64(d7, r7    ));
+		m5 += (mul32x32_64(d9, r6    ) + mul32x32_64(d8, r7 * 2));
+		m6 += (mul32x32_64(d9, r7 * 2) + mul32x32_64(d8, r8    ));
+		m7 += (mul32x32_64(d9, r8    ));
+		m8 += (mul32x32_64(d9, r9    ));
+
+		                             r0 = (uint32_t)m0 & reduce_mask_26; c = (m0 >> 26);
+		m1 += c;                     r1 = (uint32_t)m1 & reduce_mask_25; c = (m1 >> 25);
+		m2 += c;                     r2 = (uint32_t)m2 & reduce_mask_26; c = (m2 >> 26);
+		m3 += c;                     r3 = (uint32_t)m3 & reduce_mask_25; c = (m3 >> 25);
+		m4 += c;                     r4 = (uint32_t)m4 & reduce_mask_26; c = (m4 >> 26);
+		m5 += c;                     r5 = (uint32_t)m5 & reduce_mask_25; c = (m5 >> 25);
+		m6 += c;                     r6 = (uint32_t)m6 & reduce_mask_26; c = (m6 >> 26);
+		m7 += c;                     r7 = (uint32_t)m7 & reduce_mask_25; c = (m7 >> 25);
+		m8 += c;                     r8 = (uint32_t)m8 & reduce_mask_26; c = (m8 >> 26);
+		m9 += c;                     r9 = (uint32_t)m9 & reduce_mask_25; p = (uint32_t)(m9 >> 25);
+		m0 = r0 + mul32x32_64(p,19); r0 = (uint32_t)m0 & reduce_mask_26; p = (uint32_t)(m0 >> 26);
+		r1 += p;
+	} while (--count);
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+	out[5] = r5;
+	out[6] = r6;
+	out[7] = r7;
+	out[8] = r8;
+	out[9] = r9;
+}
+
+
+/* Take a little-endian, 32-byte number and expand it into polynomial form */
+static void
+curve25519_expand(bignum25519 out, const unsigned char in[32]) {
+	static const union { uint8_t b[2]; uint16_t s; } endian_check = {{1,0}};
+	uint32_t x0,x1,x2,x3,x4,x5,x6,x7;
+
+	if (endian_check.s == 1) {
+		x0 = *(uint32_t *)(in + 0);
+		x1 = *(uint32_t *)(in + 4);
+		x2 = *(uint32_t *)(in + 8);
+		x3 = *(uint32_t *)(in + 12);
+		x4 = *(uint32_t *)(in + 16);
+		x5 = *(uint32_t *)(in + 20);
+		x6 = *(uint32_t *)(in + 24);
+		x7 = *(uint32_t *)(in + 28);
+    } else {
+		#define F(s)                         \
+			((((uint32_t)in[s + 0])      ) | \
+			 (((uint32_t)in[s + 1]) <<  8) | \
+			 (((uint32_t)in[s + 2]) << 16) | \
+			 (((uint32_t)in[s + 3]) << 24))
+		x0 = F(0);
+		x1 = F(4);
+		x2 = F(8);
+		x3 = F(12);
+		x4 = F(16);
+		x5 = F(20);
+		x6 = F(24);
+		x7 = F(28);
+		#undef F
+	}
+
+	out[0] = (                        x0       ) & reduce_mask_26;
+	out[1] = ((((uint64_t)x1 << 32) | x0) >> 26) & reduce_mask_25;
+	out[2] = ((((uint64_t)x2 << 32) | x1) >> 19) & reduce_mask_26;
+	out[3] = ((((uint64_t)x3 << 32) | x2) >> 13) & reduce_mask_25;
+	out[4] = ((                       x3) >>  6) & reduce_mask_26;
+	out[5] = (                        x4       ) & reduce_mask_25;
+	out[6] = ((((uint64_t)x5 << 32) | x4) >> 25) & reduce_mask_26;
+	out[7] = ((((uint64_t)x6 << 32) | x5) >> 19) & reduce_mask_25;
+	out[8] = ((((uint64_t)x7 << 32) | x6) >> 12) & reduce_mask_26;
+	out[9] = ((                       x7) >>  6) & reduce_mask_25; /* ignore the top bit */
+}
+
+/* Take a fully reduced polynomial form number and contract it into a little-endian, 32-byte array */
+static void
+curve25519_contract(unsigned char out[32], const bignum25519 in) {
+	bignum25519 f;
+	curve25519_copy(f, in);
+
+	#define carry_pass() \
+		f[1] += f[0] >> 26; f[0] &= reduce_mask_26; \
+		f[2] += f[1] >> 25; f[1] &= reduce_mask_25; \
+		f[3] += f[2] >> 26; f[2] &= reduce_mask_26; \
+		f[4] += f[3] >> 25; f[3] &= reduce_mask_25; \
+		f[5] += f[4] >> 26; f[4] &= reduce_mask_26; \
+		f[6] += f[5] >> 25; f[5] &= reduce_mask_25; \
+		f[7] += f[6] >> 26; f[6] &= reduce_mask_26; \
+		f[8] += f[7] >> 25; f[7] &= reduce_mask_25; \
+		f[9] += f[8] >> 26; f[8] &= reduce_mask_26;
+
+	#define carry_pass_full() \
+		carry_pass() \
+		f[0] += 19 * (f[9] >> 25); f[9] &= reduce_mask_25;
+
+	#define carry_pass_final() \
+		carry_pass() \
+		f[9] &= reduce_mask_25;
+
+	carry_pass_full()
+	carry_pass_full()
+
+	/* now t is between 0 and 2^255-1, properly carried. */
+	/* case 1: between 0 and 2^255-20. case 2: between 2^255-19 and 2^255-1. */
+	f[0] += 19;
+	carry_pass_full()
+
+	/* now between 19 and 2^255-1 in both cases, and offset by 19. */
+	f[0] += (1 << 26) - 19;
+	f[1] += (1 << 25) - 1;
+	f[2] += (1 << 26) - 1;
+	f[3] += (1 << 25) - 1;
+	f[4] += (1 << 26) - 1;
+	f[5] += (1 << 25) - 1;
+	f[6] += (1 << 26) - 1;
+	f[7] += (1 << 25) - 1;
+	f[8] += (1 << 26) - 1;
+	f[9] += (1 << 25) - 1;
+
+	/* now between 2^255 and 2^256-20, and offset by 2^255. */
+	carry_pass_final()
+
+	#undef carry_pass
+	#undef carry_full
+	#undef carry_final
+
+	f[1] <<= 2;
+	f[2] <<= 3;
+	f[3] <<= 5;
+	f[4] <<= 6;
+	f[6] <<= 1;
+	f[7] <<= 3;
+	f[8] <<= 4;
+	f[9] <<= 6;
+
+	#define F(i, s) \
+		out[s+0] |= (unsigned char )(f[i] & 0xff); \
+		out[s+1] = (unsigned char )((f[i] >> 8) & 0xff); \
+		out[s+2] = (unsigned char )((f[i] >> 16) & 0xff); \
+		out[s+3] = (unsigned char )((f[i] >> 24) & 0xff);
+
+	out[0] = 0;
+	out[16] = 0;
+	F(0,0);
+	F(1,3);
+	F(2,6);
+	F(3,9);
+	F(4,12);
+	F(5,16);
+	F(6,19);
+	F(7,22);
+	F(8,25);
+	F(9,28);
+	#undef F
+}
+
+/*
+ * Swap the contents of [qx] and [qpx] iff @swap is non-zero
+ */
+DONNA_INLINE static void
+curve25519_swap_conditional(bignum25519 x, bignum25519 qpx, uint32_t iswap) {
+	const uint32_t swap = (uint32_t)(-(int32_t)iswap);
+	uint32_t x0,x1,x2,x3,x4,x5,x6,x7,x8,x9;
+
+	x0 = swap & (x[0] ^ qpx[0]); x[0] ^= x0; qpx[0] ^= x0;
+	x1 = swap & (x[1] ^ qpx[1]); x[1] ^= x1; qpx[1] ^= x1;
+	x2 = swap & (x[2] ^ qpx[2]); x[2] ^= x2; qpx[2] ^= x2;
+	x3 = swap & (x[3] ^ qpx[3]); x[3] ^= x3; qpx[3] ^= x3;
+	x4 = swap & (x[4] ^ qpx[4]); x[4] ^= x4; qpx[4] ^= x4;
+	x5 = swap & (x[5] ^ qpx[5]); x[5] ^= x5; qpx[5] ^= x5;
+	x6 = swap & (x[6] ^ qpx[6]); x[6] ^= x6; qpx[6] ^= x6;
+	x7 = swap & (x[7] ^ qpx[7]); x[7] ^= x7; qpx[7] ^= x7;
+	x8 = swap & (x[8] ^ qpx[8]); x[8] ^= x8; qpx[8] ^= x8;
+	x9 = swap & (x[9] ^ qpx[9]); x[9] ^= x9; qpx[9] ^= x9;
+}
+

src/external/curve25519-donna/curve25519-donna-64bit.h

@@ -0,0 +1,345 @@
+typedef uint64_t bignum25519[5];
+
+static const uint64_t reduce_mask_51 = ((uint64_t)1 << 51) - 1;
+static const uint64_t reduce_mask_52 = ((uint64_t)1 << 52) - 1;
+
+/* out = in */
+DONNA_INLINE static void
+curve25519_copy(bignum25519 out, const bignum25519 in) {
+	out[0] = in[0];
+	out[1] = in[1];
+	out[2] = in[2];
+	out[3] = in[3];
+	out[4] = in[4];
+}
+
+/* out = a + b */
+DONNA_INLINE static void
+curve25519_add(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + b[0];
+	out[1] = a[1] + b[1];
+	out[2] = a[2] + b[2];
+	out[3] = a[3] + b[3];
+	out[4] = a[4] + b[4];
+}
+
+static const uint64_t two54m152 = (((uint64_t)1) << 54) - 152;
+static const uint64_t two54m8 = (((uint64_t)1) << 54) - 8;
+
+/* out = a - b */
+DONNA_INLINE static void
+curve25519_sub(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + two54m152 - b[0];
+	out[1] = a[1] + two54m8 - b[1];
+	out[2] = a[2] + two54m8 - b[2];
+	out[3] = a[3] + two54m8 - b[3];
+	out[4] = a[4] + two54m8 - b[4];
+}
+
+
+/* out = (in * scalar) */
+DONNA_INLINE static void
+curve25519_scalar_product(bignum25519 out, const bignum25519 in, const uint64_t scalar) {
+  uint128_t a;
+  uint64_t c;
+
+#if defined(HAVE_NATIVE_UINT128)
+	a = ((uint128_t) in[0]) * scalar;     out[0] = (uint64_t)a & reduce_mask_51; c = (uint64_t)(a >> 51);
+	a = ((uint128_t) in[1]) * scalar + c; out[1] = (uint64_t)a & reduce_mask_51; c = (uint64_t)(a >> 51);
+	a = ((uint128_t) in[2]) * scalar + c; out[2] = (uint64_t)a & reduce_mask_51; c = (uint64_t)(a >> 51);
+	a = ((uint128_t) in[3]) * scalar + c; out[3] = (uint64_t)a & reduce_mask_51; c = (uint64_t)(a >> 51);
+	a = ((uint128_t) in[4]) * scalar + c; out[4] = (uint64_t)a & reduce_mask_51; c = (uint64_t)(a >> 51);
+	                                      out[0] += c * 19;
+#else
+	mul64x64_128(a, in[0], scalar)                  out[0] = lo128(a) & reduce_mask_51; shr128(c, a, 51);
+	mul64x64_128(a, in[1], scalar) add128_64(a, c)  out[1] = lo128(a) & reduce_mask_51; shr128(c, a, 51);
+	mul64x64_128(a, in[2], scalar) add128_64(a, c)  out[2] = lo128(a) & reduce_mask_51; shr128(c, a, 51);
+	mul64x64_128(a, in[3], scalar) add128_64(a, c)  out[3] = lo128(a) & reduce_mask_51; shr128(c, a, 51);
+	mul64x64_128(a, in[4], scalar) add128_64(a, c)  out[4] = lo128(a) & reduce_mask_51; shr128(c, a, 51);
+	                                                out[0] += c * 19;
+#endif
+}
+
+/* out = a * b */
+DONNA_INLINE static void
+curve25519_mul(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+#if !defined(HAVE_NATIVE_UINT128)
+	uint128_t mul;
+#endif
+	uint128_t t[5];
+	uint64_t r0,r1,r2,r3,r4,s0,s1,s2,s3,s4,c;
+
+	r0 = b[0];
+	r1 = b[1];
+	r2 = b[2];
+	r3 = b[3];
+	r4 = b[4];
+
+	s0 = a[0];
+	s1 = a[1];
+	s2 = a[2];
+	s3 = a[3];
+	s4 = a[4];
+
+#if defined(HAVE_NATIVE_UINT128)
+	t[0]  =  ((uint128_t) r0) * s0;
+	t[1]  =  ((uint128_t) r0) * s1 + ((uint128_t) r1) * s0;
+	t[2]  =  ((uint128_t) r0) * s2 + ((uint128_t) r2) * s0 + ((uint128_t) r1) * s1;
+	t[3]  =  ((uint128_t) r0) * s3 + ((uint128_t) r3) * s0 + ((uint128_t) r1) * s2 + ((uint128_t) r2) * s1;
+	t[4]  =  ((uint128_t) r0) * s4 + ((uint128_t) r4) * s0 + ((uint128_t) r3) * s1 + ((uint128_t) r1) * s3 + ((uint128_t) r2) * s2;
+#else
+	mul64x64_128(t[0], r0, s0)
+	mul64x64_128(t[1], r0, s1) mul64x64_128(mul, r1, s0) add128(t[1], mul)
+	mul64x64_128(t[2], r0, s2) mul64x64_128(mul, r2, s0) add128(t[2], mul) mul64x64_128(mul, r1, s1) add128(t[2], mul)
+	mul64x64_128(t[3], r0, s3) mul64x64_128(mul, r3, s0) add128(t[3], mul) mul64x64_128(mul, r1, s2) add128(t[3], mul) mul64x64_128(mul, r2, s1) add128(t[3], mul)
+	mul64x64_128(t[4], r0, s4) mul64x64_128(mul, r4, s0) add128(t[4], mul) mul64x64_128(mul, r3, s1) add128(t[4], mul) mul64x64_128(mul, r1, s3) add128(t[4], mul) mul64x64_128(mul, r2, s2) add128(t[4], mul)
+#endif
+
+	r1 *= 19;
+	r2 *= 19;
+	r3 *= 19;
+	r4 *= 19;
+
+#if defined(HAVE_NATIVE_UINT128)
+	t[0] += ((uint128_t) r4) * s1 + ((uint128_t) r1) * s4 + ((uint128_t) r2) * s3 + ((uint128_t) r3) * s2;
+	t[1] += ((uint128_t) r4) * s2 + ((uint128_t) r2) * s4 + ((uint128_t) r3) * s3;
+	t[2] += ((uint128_t) r4) * s3 + ((uint128_t) r3) * s4;
+	t[3] += ((uint128_t) r4) * s4;
+#else
+	mul64x64_128(mul, r4, s1) add128(t[0], mul) mul64x64_128(mul, r1, s4) add128(t[0], mul) mul64x64_128(mul, r2, s3) add128(t[0], mul) mul64x64_128(mul, r3, s2) add128(t[0], mul)
+	mul64x64_128(mul, r4, s2) add128(t[1], mul) mul64x64_128(mul, r2, s4) add128(t[1], mul) mul64x64_128(mul, r3, s3) add128(t[1], mul)
+	mul64x64_128(mul, r4, s3) add128(t[2], mul) mul64x64_128(mul, r3, s4) add128(t[2], mul)
+	mul64x64_128(mul, r4, s4) add128(t[3], mul)
+#endif
+
+	                     r0 = lo128(t[0]) & reduce_mask_51; shr128(c, t[0], 51);
+	add128_64(t[1], c)   r1 = lo128(t[1]) & reduce_mask_51; shr128(c, t[1], 51);
+	add128_64(t[2], c)   r2 = lo128(t[2]) & reduce_mask_51; shr128(c, t[2], 51);
+	add128_64(t[3], c)   r3 = lo128(t[3]) & reduce_mask_51; shr128(c, t[3], 51);
+	add128_64(t[4], c)   r4 = lo128(t[4]) & reduce_mask_51; shr128(c, t[4], 51);
+	r0 +=   c * 19; c = r0 >> 51; r0 = r0 & reduce_mask_51;
+	r1 +=   c;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+}
+
+/* out = in^(2 * count) */
+DONNA_INLINE static void
+curve25519_square_times(bignum25519 out, const bignum25519 in, uint64_t count) {
+#if !defined(HAVE_NATIVE_UINT128)
+	uint128_t mul;
+#endif
+	uint128_t t[5];
+	uint64_t r0,r1,r2,r3,r4,c;
+	uint64_t d0,d1,d2,d4,d419;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+
+	do {
+		d0 = r0 * 2;
+		d1 = r1 * 2;
+		d2 = r2 * 2 * 19;
+		d419 = r4 * 19;
+		d4 = d419 * 2;
+
+#if defined(HAVE_NATIVE_UINT128)
+		t[0] = ((uint128_t) r0) * r0 + ((uint128_t) d4) * r1 + (((uint128_t) d2) * (r3     ));
+		t[1] = ((uint128_t) d0) * r1 + ((uint128_t) d4) * r2 + (((uint128_t) r3) * (r3 * 19));
+		t[2] = ((uint128_t) d0) * r2 + ((uint128_t) r1) * r1 + (((uint128_t) d4) * (r3     ));
+		t[3] = ((uint128_t) d0) * r3 + ((uint128_t) d1) * r2 + (((uint128_t) r4) * (d419   ));
+		t[4] = ((uint128_t) d0) * r4 + ((uint128_t) d1) * r3 + (((uint128_t) r2) * (r2     ));
+#else
+		mul64x64_128(t[0], r0, r0) mul64x64_128(mul, d4, r1) add128(t[0], mul) mul64x64_128(mul, d2,      r3) add128(t[0], mul)
+		mul64x64_128(t[1], d0, r1) mul64x64_128(mul, d4, r2) add128(t[1], mul) mul64x64_128(mul, r3, r3 * 19) add128(t[1], mul)
+		mul64x64_128(t[2], d0, r2) mul64x64_128(mul, r1, r1) add128(t[2], mul) mul64x64_128(mul, d4,      r3) add128(t[2], mul)
+		mul64x64_128(t[3], d0, r3) mul64x64_128(mul, d1, r2) add128(t[3], mul) mul64x64_128(mul, r4,    d419) add128(t[3], mul)
+		mul64x64_128(t[4], d0, r4) mul64x64_128(mul, d1, r3) add128(t[4], mul) mul64x64_128(mul, r2,      r2) add128(t[4], mul)
+#endif
+
+		                     r0 = lo128(t[0]) & reduce_mask_51; shr128(c, t[0], 51);
+		add128_64(t[1], c)   r1 = lo128(t[1]) & reduce_mask_51; shr128(c, t[1], 51);
+		add128_64(t[2], c)   r2 = lo128(t[2]) & reduce_mask_51; shr128(c, t[2], 51);
+		add128_64(t[3], c)   r3 = lo128(t[3]) & reduce_mask_51; shr128(c, t[3], 51);
+		add128_64(t[4], c)   r4 = lo128(t[4]) & reduce_mask_51; shr128(c, t[4], 51);
+		r0 +=   c * 19; c = r0 >> 51; r0 = r0 & reduce_mask_51;
+		r1 +=   c;
+	} while(--count);
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+}
+
+DONNA_INLINE static void
+curve25519_square(bignum25519 out, const bignum25519 in) {
+#if !defined(HAVE_NATIVE_UINT128)
+	uint128_t mul;
+#endif
+	uint128_t t[5];
+	uint64_t r0,r1,r2,r3,r4,c;
+	uint64_t d0,d1,d2,d4,d419;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+
+	d0 = r0 * 2;
+	d1 = r1 * 2;
+	d2 = r2 * 2 * 19;
+	d419 = r4 * 19;
+	d4 = d419 * 2;
+
+#if defined(HAVE_NATIVE_UINT128)
+	t[0] = ((uint128_t) r0) * r0 + ((uint128_t) d4) * r1 + (((uint128_t) d2) * (r3     ));
+	t[1] = ((uint128_t) d0) * r1 + ((uint128_t) d4) * r2 + (((uint128_t) r3) * (r3 * 19));
+	t[2] = ((uint128_t) d0) * r2 + ((uint128_t) r1) * r1 + (((uint128_t) d4) * (r3     ));
+	t[3] = ((uint128_t) d0) * r3 + ((uint128_t) d1) * r2 + (((uint128_t) r4) * (d419   ));
+	t[4] = ((uint128_t) d0) * r4 + ((uint128_t) d1) * r3 + (((uint128_t) r2) * (r2     ));
+#else
+	mul64x64_128(t[0], r0, r0) mul64x64_128(mul, d4, r1) add128(t[0], mul) mul64x64_128(mul, d2,      r3) add128(t[0], mul)
+	mul64x64_128(t[1], d0, r1) mul64x64_128(mul, d4, r2) add128(t[1], mul) mul64x64_128(mul, r3, r3 * 19) add128(t[1], mul)
+	mul64x64_128(t[2], d0, r2) mul64x64_128(mul, r1, r1) add128(t[2], mul) mul64x64_128(mul, d4,      r3) add128(t[2], mul)
+	mul64x64_128(t[3], d0, r3) mul64x64_128(mul, d1, r2) add128(t[3], mul) mul64x64_128(mul, r4,    d419) add128(t[3], mul)
+	mul64x64_128(t[4], d0, r4) mul64x64_128(mul, d1, r3) add128(t[4], mul) mul64x64_128(mul, r2,      r2) add128(t[4], mul)
+#endif
+
+	                     r0 = lo128(t[0]) & reduce_mask_51; shr128(c, t[0], 51);
+	add128_64(t[1], c)   r1 = lo128(t[1]) & reduce_mask_51; shr128(c, t[1], 51);
+	add128_64(t[2], c)   r2 = lo128(t[2]) & reduce_mask_51; shr128(c, t[2], 51);
+	add128_64(t[3], c)   r3 = lo128(t[3]) & reduce_mask_51; shr128(c, t[3], 51);
+	add128_64(t[4], c)   r4 = lo128(t[4]) & reduce_mask_51; shr128(c, t[4], 51);
+	r0 +=   c * 19; c = r0 >> 51; r0 = r0 & reduce_mask_51;
+	r1 +=   c;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+}
+
+
+/* Take a little-endian, 32-byte number and expand it into polynomial form */
+DONNA_INLINE static void
+curve25519_expand(bignum25519 out, const unsigned char *in) {
+	static const union { uint8_t b[2]; uint16_t s; } endian_check = {{1,0}};
+	uint64_t x0,x1,x2,x3;
+
+	if (endian_check.s == 1) {
+		x0 = *(uint64_t *)(in + 0);
+		x1 = *(uint64_t *)(in + 8);
+		x2 = *(uint64_t *)(in + 16);
+		x3 = *(uint64_t *)(in + 24);
+	} else {
+		#define F(s)                         \
+			((((uint64_t)in[s + 0])      ) | \
+			 (((uint64_t)in[s + 1]) <<  8) | \
+			 (((uint64_t)in[s + 2]) << 16) | \
+			 (((uint64_t)in[s + 3]) << 24) | \
+			 (((uint64_t)in[s + 4]) << 32) | \
+			 (((uint64_t)in[s + 5]) << 40) | \
+			 (((uint64_t)in[s + 6]) << 48) | \
+			 (((uint64_t)in[s + 7]) << 56))
+
+		x0 = F(0);
+		x1 = F(8);
+		x2 = F(16);
+		x3 = F(24);
+	}
+
+	out[0] = x0 & reduce_mask_51; x0 = (x0 >> 51) | (x1 << 13);
+	out[1] = x0 & reduce_mask_51; x1 = (x1 >> 38) | (x2 << 26);
+	out[2] = x1 & reduce_mask_51; x2 = (x2 >> 25) | (x3 << 39);
+	out[3] = x2 & reduce_mask_51; x3 = (x3 >> 12);
+	out[4] = x3 & reduce_mask_51; /* ignore the top bit */
+}
+
+/* Take a fully reduced polynomial form number and contract it into a
+ * little-endian, 32-byte array
+ */
+DONNA_INLINE static void
+curve25519_contract(unsigned char *out, const bignum25519 input) {
+	uint64_t t[5];
+	uint64_t f, i;
+
+	t[0] = input[0];
+	t[1] = input[1];
+	t[2] = input[2];
+	t[3] = input[3];
+	t[4] = input[4];
+
+	#define curve25519_contract_carry() \
+		t[1] += t[0] >> 51; t[0] &= reduce_mask_51; \
+		t[2] += t[1] >> 51; t[1] &= reduce_mask_51; \
+		t[3] += t[2] >> 51; t[2] &= reduce_mask_51; \
+		t[4] += t[3] >> 51; t[3] &= reduce_mask_51;
+
+	#define curve25519_contract_carry_full() curve25519_contract_carry() \
+		t[0] += 19 * (t[4] >> 51); t[4] &= reduce_mask_51;
+
+	#define curve25519_contract_carry_final() curve25519_contract_carry() \
+		t[4] &= reduce_mask_51;
+
+	curve25519_contract_carry_full()
+	curve25519_contract_carry_full()
+
+	/* now t is between 0 and 2^255-1, properly carried. */
+	/* case 1: between 0 and 2^255-20. case 2: between 2^255-19 and 2^255-1. */
+	t[0] += 19;
+	curve25519_contract_carry_full()
+
+	/* now between 19 and 2^255-1 in both cases, and offset by 19. */
+	t[0] += 0x8000000000000 - 19;
+	t[1] += 0x8000000000000 - 1;
+	t[2] += 0x8000000000000 - 1;
+	t[3] += 0x8000000000000 - 1;
+	t[4] += 0x8000000000000 - 1;
+
+	/* now between 2^255 and 2^256-20, and offset by 2^255. */
+	curve25519_contract_carry_final()
+
+	#define write51full(n,shift) \
+		f = ((t[n] >> shift) | (t[n+1] << (51 - shift))); \
+		for (i = 0; i < 8; i++, f >>= 8) *out++ = (unsigned char)f;
+	#define write51(n) write51full(n,13*n)
+
+	write51(0)
+	write51(1)
+	write51(2)
+	write51(3)
+
+	#undef curve25519_contract_carry
+	#undef curve25519_contract_carry_full
+	#undef curve25519_contract_carry_final
+	#undef write51full
+	#undef write51
+}
+
+/*
+ * Swap the contents of [qx] and [qpx] iff @swap is non-zero
+ */
+DONNA_INLINE static void
+curve25519_swap_conditional(bignum25519 x, bignum25519 qpx, uint64_t iswap) {
+	const uint64_t swap = (uint64_t)(-(int64_t)iswap);
+	uint64_t x0,x1,x2,x3,x4;
+
+	x0 = swap & (x[0] ^ qpx[0]); x[0] ^= x0; qpx[0] ^= x0;
+	x1 = swap & (x[1] ^ qpx[1]); x[1] ^= x1; qpx[1] ^= x1;
+	x2 = swap & (x[2] ^ qpx[2]); x[2] ^= x2; qpx[2] ^= x2;
+	x3 = swap & (x[3] ^ qpx[3]); x[3] ^= x3; qpx[3] ^= x3;
+	x4 = swap & (x[4] ^ qpx[4]); x[4] ^= x4; qpx[4] ^= x4;
+
+}
+

src/external/curve25519-donna/curve25519-donna-common.h

@@ -0,0 +1,43 @@
+/*
+ * In:  b =   2^5 - 2^0
+ * Out: b = 2^250 - 2^0
+ */
+static void
+curve25519_pow_two5mtwo0_two250mtwo0(bignum25519 b) {
+	bignum25519 ALIGN(16) t0,c;
+
+	/* 2^5  - 2^0 */ /* b */
+	/* 2^10 - 2^5 */ curve25519_square_times(t0, b, 5);
+	/* 2^10 - 2^0 */ curve25519_mul(b, t0, b);
+	/* 2^20 - 2^10 */ curve25519_square_times(t0, b, 10);
+	/* 2^20 - 2^0 */ curve25519_mul(c, t0, b);
+	/* 2^40 - 2^20 */ curve25519_square_times(t0, c, 20);
+	/* 2^40 - 2^0 */ curve25519_mul(t0, t0, c);
+	/* 2^50 - 2^10 */ curve25519_square_times(t0, t0, 10);
+	/* 2^50 - 2^0 */ curve25519_mul(b, t0, b);
+	/* 2^100 - 2^50 */ curve25519_square_times(t0, b, 50);
+	/* 2^100 - 2^0 */ curve25519_mul(c, t0, b);
+	/* 2^200 - 2^100 */ curve25519_square_times(t0, c, 100);
+	/* 2^200 - 2^0 */ curve25519_mul(t0, t0, c);
+	/* 2^250 - 2^50 */ curve25519_square_times(t0, t0, 50);
+	/* 2^250 - 2^0 */ curve25519_mul(b, t0, b);
+}
+
+/*
+ * z^(p - 2) = z(2^255 - 21)
+ */
+static void
+curve25519_recip(bignum25519 out, const bignum25519 z) {
+	bignum25519 ALIGN(16) a,t0,b;
+
+	/* 2 */ curve25519_square(a, z); /* a = 2 */
+	/* 8 */ curve25519_square_times(t0, a, 2);
+	/* 9 */ curve25519_mul(b, t0, z); /* b = 9 */
+	/* 11 */ curve25519_mul(a, b, a); /* a = 11 */
+	/* 22 */ curve25519_square(t0, a);
+	/* 2^5 - 2^0 = 31 */ curve25519_mul(b, t0, b);
+	/* 2^250 - 2^0 */ curve25519_pow_two5mtwo0_two250mtwo0(b);
+	/* 2^255 - 2^5 */ curve25519_square_times(b, b, 5);
+	/* 2^255 - 21 */ curve25519_mul(out, b, a);
+}
+

src/external/curve25519-donna/curve25519-donna-portable-identify.h

@@ -0,0 +1,103 @@
+/* os */
+#if defined(_WIN32)	|| defined(_WIN64) || defined(__TOS_WIN__) || defined(__WINDOWS__)
+	#define OS_WINDOWS
+#elif defined(sun) || defined(__sun) || defined(__SVR4) || defined(__svr4__)
+	#define OS_SOLARIS
+#else
+	#include <sys/param.h> /* need this to define BSD */
+	#define OS_NIX
+	#if defined(__linux__)
+		#define OS_LINUX
+	#elif defined(BSD)
+		#define OS_BSD
+		#if defined(MACOS_X) || (defined(__APPLE__) & defined(__MACH__))
+			#define OS_OSX
+		#elif defined(macintosh) || defined(Macintosh)
+			#define OS_MAC
+		#elif defined(__OpenBSD__)
+			#define OS_OPENBSD
+		#endif
+	#endif
+#endif
+
+
+/* compiler */
+#if defined(_MSC_VER)
+	#define COMPILER_MSVC
+#endif
+#if defined(__ICC)
+	#define COMPILER_INTEL
+#endif
+#if defined(__GNUC__)
+	#if (__GNUC__ >= 3)
+		#define COMPILER_GCC ((__GNUC__ * 10000) + (__GNUC_MINOR__ * 100) + (__GNUC_PATCHLEVEL__))
+	#else
+		#define COMPILER_GCC ((__GNUC__ * 10000) + (__GNUC_MINOR__ * 100)                        )
+	#endif
+#endif
+#if defined(__PATHCC__)
+	#define COMPILER_PATHCC
+#endif
+#if defined(__clang__)
+	#define COMPILER_CLANG ((__clang_major__ * 10000) + (__clang_minor__ * 100) + (__clang_patchlevel__))
+#endif
+
+
+
+/* cpu */
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__ ) || defined(_M_X64)
+	#define CPU_X86_64
+#elif defined(__i586__) || defined(__i686__) || (defined(_M_IX86) && (_M_IX86 >= 500))
+	#define CPU_X86 500
+#elif defined(__i486__) || (defined(_M_IX86) && (_M_IX86 >= 400))
+	#define CPU_X86 400
+#elif defined(__i386__) || (defined(_M_IX86) && (_M_IX86 >= 300)) || defined(__X86__) || defined(_X86_) || defined(__I86__)
+	#define CPU_X86 300
+#elif defined(__ia64__) || defined(_IA64) || defined(__IA64__) || defined(_M_IA64) || defined(__ia64)
+	#define CPU_IA64
+#endif
+
+#if defined(__sparc__) || defined(__sparc) || defined(__sparcv9)
+	#define CPU_SPARC
+	#if defined(__sparcv9)
+		#define CPU_SPARC64
+	#endif
+#endif
+
+#if defined(powerpc) || defined(__PPC__) || defined(__ppc__) || defined(_ARCH_PPC) || defined(__powerpc__) || defined(__powerpc) || defined(POWERPC) || defined(_M_PPC)
+	#define CPU_PPC
+	#if defined(_ARCH_PWR7)
+		#define CPU_POWER7
+	#elif defined(__64BIT__)
+		#define CPU_PPC64
+	#else
+		#define CPU_PPC32
+	#endif
+#endif
+
+#if defined(__hppa__) || defined(__hppa)
+	#define CPU_HPPA
+#endif
+
+#if defined(__alpha__) || defined(__alpha) || defined(_M_ALPHA)
+	#define CPU_ALPHA
+#endif
+
+/* 64 bit cpu */
+#if defined(CPU_X86_64) || defined(CPU_IA64) || defined(CPU_SPARC64) || defined(__64BIT__) || defined(__LP64__) || defined(_LP64) || (defined(_MIPS_SZLONG) && (_MIPS_SZLONG == 64))
+	#define CPU_64BITS
+#endif
+
+#if defined(COMPILER_MSVC)
+	typedef signed char int8_t;
+	typedef unsigned char uint8_t;
+	typedef signed short int16_t;
+	typedef unsigned short uint16_t;
+	typedef signed int int32_t;
+	typedef unsigned int uint32_t;
+	typedef signed __int64 int64_t;
+	typedef unsigned __int64 uint64_t;
+#else
+	#include <stdint.h>
+#endif
+

src/external/curve25519-donna/curve25519-donna-portable.h

@@ -0,0 +1,92 @@
+#include "curve25519-donna-portable-identify.h"
+
+#define mul32x32_64(a,b) (((uint64_t)(a))*(b))
+
+/* platform */
+#if defined(COMPILER_MSVC)
+	#include <intrin.h>
+	#if !defined(_DEBUG)
+		#undef mul32x32_64
+		#define mul32x32_64(a,b) __emulu(a,b)
+	#endif
+	#undef inline
+	#define inline __forceinline
+	#define DONNA_INLINE __forceinline
+	#define DONNA_NOINLINE __declspec(noinline)
+	#define ALIGN(x) __declspec(align(x))
+	#define ROTL32(a,b) _rotl(a,b)
+	#define ROTR32(a,b) _rotr(a,b)
+#else
+	#include <sys/param.h>
+	#define DONNA_INLINE inline __attribute__((always_inline))
+	#define DONNA_NOINLINE __attribute__((noinline))
+	#define ALIGN(x) __attribute__((aligned(x)))
+	#define ROTL32(a,b) (((a) << (b)) | ((a) >> (32 - b)))
+	#define ROTR32(a,b) (((a) >> (b)) | ((a) << (32 - b)))
+#endif
+
+/* uint128_t */
+#if defined(CPU_64BITS) && !defined(ED25519_FORCE_32BIT)
+	#if defined(COMPILER_CLANG) && (COMPILER_CLANG >= 30100)
+		#define HAVE_NATIVE_UINT128
+		typedef unsigned __int128 uint128_t;
+	#elif defined(COMPILER_MSVC)
+		#define HAVE_UINT128
+		typedef struct uint128_t {
+			uint64_t lo, hi;
+		} uint128_t;
+		#define mul64x64_128(out,a,b) out.lo = _umul128(a,b,&out.hi);
+		#define shr128_pair(out,hi,lo,shift) out = __shiftright128(lo, hi, shift);
+		#define shl128_pair(out,hi,lo,shift) out = __shiftleft128(lo, hi, shift);
+		#define shr128(out,in,shift) shr128_pair(out, in.hi, in.lo, shift)
+		#define shl128(out,in,shift) shl128_pair(out, in.hi, in.lo, shift)
+		#define add128(a,b) { uint64_t p = a.lo; a.lo += b.lo; a.hi += b.hi + (a.lo < p); }
+		#define add128_64(a,b) { uint64_t p = a.lo; a.lo += b; a.hi += (a.lo < p); }
+		#define lo128(a) (a.lo)
+		#define hi128(a) (a.hi)
+	#elif defined(COMPILER_GCC) && !defined(HAVE_NATIVE_UINT128)
+		#if defined(__SIZEOF_INT128__)
+			#define HAVE_NATIVE_UINT128
+			typedef unsigned __int128 uint128_t;
+		#elif (COMPILER_GCC >= 40400)
+			#define HAVE_NATIVE_UINT128
+			typedef unsigned uint128_t __attribute__((mode(TI)));
+		#elif defined(CPU_X86_64)
+			#define HAVE_UINT128
+			typedef struct uint128_t {
+				uint64_t lo, hi;
+			} uint128_t;
+			#define mul64x64_128(out,a,b) __asm__ ("mulq %3" : "=a" (out.lo), "=d" (out.hi) : "a" (a), "rm" (b));
+			#define shr128_pair(out,hi,lo,shift) __asm__ ("shrdq %2,%1,%0" : "+r" (lo) : "r" (hi), "J" (shift)); out = lo;
+			#define shl128_pair(out,hi,lo,shift) __asm__ ("shldq %2,%1,%0" : "+r" (hi) : "r" (lo), "J" (shift)); out = hi;
+			#define shr128(out,in,shift) shr128_pair(out,in.hi, in.lo, shift)
+			#define shl128(out,in,shift) shl128_pair(out,in.hi, in.lo, shift)
+			#define add128(a,b) __asm__ ("addq %4,%2; adcq %5,%3" : "=r" (a.hi), "=r" (a.lo) : "1" (a.lo), "0" (a.hi), "rm" (b.lo), "rm" (b.hi) : "cc");
+			#define add128_64(a,b) __asm__ ("addq %4,%2; adcq $0,%3" : "=r" (a.hi), "=r" (a.lo) : "1" (a.lo), "0" (a.hi), "rm" (b) : "cc");
+			#define lo128(a) (a.lo)
+			#define hi128(a) (a.hi)
+		#endif
+	#endif
+
+	#if defined(HAVE_NATIVE_UINT128)
+		#define HAVE_UINT128
+		#define mul64x64_128(out,a,b) out = (uint128_t)a * b;
+		#define shr128_pair(out,hi,lo,shift) out = (uint64_t)((((uint128_t)hi << 64) | lo) >> (shift));
+		#define shl128_pair(out,hi,lo,shift) out = (uint64_t)(((((uint128_t)hi << 64) | lo) << (shift)) >> 64);
+		#define shr128(out,in,shift) out = (uint64_t)(in >> (shift));
+		#define shl128(out,in,shift) out = (uint64_t)((in << shift) >> 64);
+		#define add128(a,b) a += b;
+		#define add128_64(a,b) a += (uint64_t)b;
+		#define lo128(a) ((uint64_t)a)
+		#define hi128(a) ((uint64_t)(a >> 64))
+	#endif
+
+	#if !defined(HAVE_UINT128)
+		#error Need a uint128_t implementation!
+	#endif
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+

src/external/curve25519-donna/curve25519-donna-scalarmult-base.h

@@ -0,0 +1,66 @@
+/* Calculates nQ where Q is the x-coordinate of a point on the curve
+ *
+ *   mypublic: the packed little endian x coordinate of the resulting curve point
+ *   n: a little endian, 32-byte number
+ *   basepoint: a packed little endian point of the curve
+ */
+
+static void
+curve25519_scalarmult_donna(curve25519_key mypublic, const curve25519_key n, const curve25519_key basepoint) {
+	bignum25519 nqpqx = {1}, nqpqz = {0}, nqz = {1}, nqx;
+	bignum25519 q, qx, qpqx, qqx, zzz, zmone;
+	size_t bit, lastbit;
+	int32_t i;
+
+	curve25519_expand(q, basepoint);
+	curve25519_copy(nqx, q);
+
+	/* bit 255 is always 0, and bit 254 is always 1, so skip bit 255 and 
+	   start pre-swapped on bit 254 */
+	lastbit = 1;
+
+	/* we are doing bits 254..3 in the loop, but are swapping in bits 253..2 */
+	for (i = 253; i >= 2; i--) {
+		curve25519_add(qx, nqx, nqz);
+		curve25519_sub(nqz, nqx, nqz);
+		curve25519_add(qpqx, nqpqx, nqpqz);
+		curve25519_sub(nqpqz, nqpqx, nqpqz);
+		curve25519_mul(nqpqx, qpqx, nqz);
+		curve25519_mul(nqpqz, qx, nqpqz);
+		curve25519_add(qqx, nqpqx, nqpqz);
+		curve25519_sub(nqpqz, nqpqx, nqpqz);
+		curve25519_square(nqpqz, nqpqz);
+		curve25519_square(nqpqx, qqx);
+		curve25519_mul(nqpqz, nqpqz, q);
+		curve25519_square(qx, qx);
+		curve25519_square(nqz, nqz);
+		curve25519_mul(nqx, qx, nqz);
+		curve25519_sub(nqz, qx, nqz);
+		curve25519_scalar_product(zzz, nqz, 121665);
+		curve25519_add(zzz, zzz, qx);
+		curve25519_mul(nqz, nqz, zzz);
+
+		bit = (n[i/8] >> (i & 7)) & 1;
+		curve25519_swap_conditional(nqx, nqpqx, bit ^ lastbit);
+		curve25519_swap_conditional(nqz, nqpqz, bit ^ lastbit);
+		lastbit = bit;
+	}
+
+	/* the final 3 bits are always zero, so we only need to double */
+	for (i = 0; i < 3; i++) {
+		curve25519_add(qx, nqx, nqz);
+		curve25519_sub(nqz, nqx, nqz);
+		curve25519_square(qx, qx);
+		curve25519_square(nqz, nqz);
+		curve25519_mul(nqx, qx, nqz);
+		curve25519_sub(nqz, qx, nqz);
+		curve25519_scalar_product(zzz, nqz, 121665);
+		curve25519_add(zzz, zzz, qx);
+		curve25519_mul(nqz, nqz, zzz);
+	}
+
+	curve25519_recip(zmone, nqz);
+	curve25519_mul(nqz, nqx, zmone);
+	curve25519_contract(mypublic, nqz);
+}
+

src/external/curve25519-donna/curve25519-donna-scalarmult-sse2.h

@@ -0,0 +1,65 @@
+
+/* Calculates nQ where Q is the x-coordinate of a point on the curve
+ *
+ *   mypublic: the packed little endian x coordinate of the resulting curve point
+ *   n: a little endian, 32-byte number
+ *   basepoint: a packed little endian point of the curve
+ */
+static void
+curve25519_scalarmult_donna(curve25519_key mypublic, const curve25519_key n, const curve25519_key basepoint) {
+	bignum25519 ALIGN(16) nqx = {1}, nqpqz = {1}, nqz = {0}, nqpqx, zmone;
+	packed32bignum25519 qx, qz, pqz, pqx;
+	packed64bignum25519 nq, sq, sqscalar, prime, primex, primez, nqpq;
+	bignum25519mulprecomp preq;
+	size_t bit, lastbit, i;
+
+	curve25519_expand(nqpqx, basepoint);
+	curve25519_mul_precompute(&preq, nqpqx);
+
+	/* do bits 254..3 */
+	for (i = 254, lastbit = 0; i >= 3; i--) {
+		bit = (n[i/8] >> (i & 7)) & 1;
+		curve25519_swap_conditional(nqx, nqpqx, bit ^ lastbit);
+		curve25519_swap_conditional(nqz, nqpqz, bit ^ lastbit);
+		lastbit = bit;
+
+		curve25519_tangle32(qx, nqx, nqpqx); /* qx = [nqx,nqpqx] */
+		curve25519_tangle32(qz, nqz, nqpqz); /* qz = [nqz,nqpqz] */
+
+		curve25519_add_packed32(pqx, qx, qz); /* pqx = [nqx+nqz,nqpqx+nqpqz] */
+		curve25519_sub_packed32(pqz, qx, qz); /* pqz = [nqx-nqz,nqpqx-nqpqz] */
+
+		curve25519_make_nqpq(primex, primez, pqx, pqz); /* primex = [nqx+nqz,nqpqx+nqpqz], primez = [nqpqx-nqpqz,nqx-nqz] */
+		curve25519_mul_packed64(prime, primex, primez); /* prime = [nqx+nqz,nqpqx+nqpqz] * [nqpqx-nqpqz,nqx-nqz] */
+		curve25519_addsub_packed64(prime); /* prime = [prime.x+prime.z,prime.x-prime.z] */
+		curve25519_square_packed64(nqpq, prime); /* nqpq = prime^2 */
+		curve25519_untangle64(nqpqx, nqpqz, nqpq);
+		curve25519_mul_precomputed(nqpqz, nqpqz, &preq); /* nqpqz = nqpqz * q */
+
+		/* (((sq.x-sq.z)*121665)+sq.x) * (sq.x-sq.z) is equivalent to (sq.x*121666-sq.z*121665) * (sq.x-sq.z) */
+		curve25519_make_nq(nq, pqx, pqz); /* nq = [nqx+nqz,nqx-nqz] */
+		curve25519_square_packed64(sq, nq); /* sq = nq^2 */
+		curve25519_121665_packed64(sqscalar, sq); /* sqscalar = sq * [121666,121665] */
+		curve25519_final_nq(nq, sq, sqscalar); /* nq = [sq.x,sqscalar.x-sqscalar.z] * [sq.z,sq.x-sq.z] */
+		curve25519_untangle64(nqx, nqz, nq);
+	};
+
+	/* it's possible to get rid of this swap with the swap in the above loop 
+	   at the bottom instead of the top, but compilers seem to optimize better this way */
+	curve25519_swap_conditional(nqx, nqpqx, bit);
+	curve25519_swap_conditional(nqz, nqpqz, bit);
+
+	/* do bits 2..0 */
+	for (i = 0; i < 3; i++) {
+		curve25519_compute_nq(nq, nqx, nqz);
+		curve25519_square_packed64(sq, nq); /* sq = nq^2 */
+		curve25519_121665_packed64(sqscalar, sq); /* sqscalar = sq * [121666,121665] */
+		curve25519_final_nq(nq, sq, sqscalar); /* nq = [sq.x,sqscalar.x-sqscalar.z] * [sq.z,sq.x-sq.z] */
+		curve25519_untangle64(nqx, nqz, nq);
+	}
+
+	curve25519_recip(zmone, nqz);
+	curve25519_mul(nqz, nqx, zmone);
+	curve25519_contract(mypublic, nqz);
+}
+

src/external/curve25519-donna/curve25519-donna.h

@@ -0,0 +1,32 @@
+#include "curve25519.h"
+#include "curve25519-donna-portable.h"
+
+#if defined(CURVE25519_SSE2)
+#else
+	#if defined(HAVE_UINT128) && !defined(CURVE25519_FORCE_32BIT)
+		#define CURVE25519_64BIT
+	#else
+		#define CURVE25519_32BIT
+	#endif
+#endif
+
+#if !defined(CURVE25519_NO_INLINE_ASM)
+#endif
+
+
+#if defined(CURVE25519_SSE2)
+	#include "curve25519-donna-sse2.h"
+#elif defined(CURVE25519_64BIT)
+	#include "curve25519-donna-64bit.h"
+#else
+	#include "curve25519-donna-32bit.h"
+#endif
+
+#include "curve25519-donna-common.h"
+
+#if defined(CURVE25519_SSE2)
+	#include "curve25519-donna-scalarmult-sse2.h"
+#else
+	#include "curve25519-donna-scalarmult-base.h"
+#endif
+

src/external/curve25519-donna/curve25519-optimizations-32bit.md

@@ -0,0 +1,123 @@
+Partial Reductions for multiplications
+--------------------------------------
+
+It is possible to get away with partial reductions for multiplications
+instead of fully reducing everything. The largest input to square/mult 
+will come from an unreduced add, which will double the element values. 
+Test values are 1 bit larger than actual maximum values.
+
+    max27 = (1 << 27) - 1
+    max26 = (1 << 26) - 1
+
+Largest values from an add of full bit values (max27,max26,max27,max26..)
+
+    m0 0x1f1fffea8000042c
+    m1 0x133ffff190000268
+    m2 0x185fffef00000354
+    m3 0x0ebffff4f00001d8
+    m4 0x119ffff38000027c
+    m5 0x0a3ffff850000148
+    m6 0x0adffff8000001a4
+    m7 0x05bffffbb00000b8
+    m8 0x041ffffc800000cc
+    m9 0x013fffff10000028
+
+Carry values from reducing sums
+
+    c0 0x00000007c7fffaa0
+    c1 0x000000099ffffcab
+    c2 0x0000000617fffe27
+    c3 0x000000075ffffd83
+    c4 0x0000000467fffeb7
+    c5 0x000000051ffffe5b
+    c6 0x00000002b7ffff47
+    c7 0x00000002dfffff33
+    c8 0x0000000107ffffd7
+    c9         0xa000000b
+    c0         0x000002f8
+
+
+The largest carried value r1 could receive is 0x2f8, with everything else 
+fitting in 25 or 26 bits. Assuming full values for everything, with 0x2f8
+added to r1 (max27,maxr1,max27,max26..):
+
+    max27 = (1 << 27) - 1
+    max26 = (1 << 26) - 1
+    maxr1 = (((1 << 25) - 1) + 0x2f8) * 2
+    
+    m0 0x1f2006f77ffc7dac
+    m1 0x134000508fffeaa8
+    m2 0x1860004e004655d4
+    m3 0x0ec00053efffea18
+    m4 0x11a000527fffd2fc
+    m5 0x0a4000574fffe988
+    m6 0x0ae00056ffffd224
+    m7 0x05c0005aafffe8f8
+    m8 0x0420005b7fffd14c
+    m9 0x0140005e0fffe868
+
+Carry values
+
+    c0 0x00000007c801bddf
+    c1 0x00000009a0002c2c
+    c2 0x00000006180015e8
+    c3 0x0000000760002d04
+    c4 0x0000000468001678
+    c5 0x0000000520002ddc
+    c6 0x00000002b8001708
+    c7 0x00000002e0002eb4
+    c8 0x0000000108001798
+    c9         0xa0002f8c
+    c0         0x000002f9
+
+The largest carried value is now 0x2f9 (max27,maxr1b,max27,max26..)
+
+    max27 = (1 << 27) - 1
+    max26 = (1 << 26) - 1
+    maxr1b = (((1 << 25) - 1) + 0x2f9) * 2
+
+    m0 0x1f2006f9dffc7c7c
+    m1 0x13400050afffeaa0
+    m2 0x1860004e2046854c
+    m3 0x0ec000540fffea10
+    m4 0x11a000529fffd2ec
+    m5 0x0a4000576fffe980
+    m6 0x0ae000571fffd214
+    m7 0x05c0005acfffe8f0
+    m8 0x0420005b9fffd13c
+    m9 0x0140005e2fffe860
+
+Carry values
+
+    c0 0x00000007c801be77
+    c1 0x00000009a0002c3c
+    c2 0x00000006180015f0
+    c3 0x0000000760002d14
+    c4 0x0000000468001680
+    c5 0x0000000520002dec
+    c6 0x00000002b8001710
+    c7 0x00000002e0002ec4
+    c8 0x00000001080017a0
+    c9         0xa0002f9c
+    c0         0x000002f9
+
+The largest carried value is fixed at 0x2f9. Subtracting the largest values 
+from 0 will result in r0 exceeding 26 bits, but r0-r4 are safe for 
+multiplications up to 30 bits, so partial reductions throughout the entire 
+calculation should be safe to chain. This especially helps with speeding up 
+the SSE2 version by freeing it from large serial carry chains. Testing of 
+course continues, but no problems as of yet have shown up.
+
+
+Subtraction
+-----------
+Subtraction with unsigned elements is done using Emilia Kasper's trick, via 
+agl: http://www.imperialviolet.org/2010/12/04/ecc.html
+
+Adding a large enough value that is equivalent to 0 mod p before subracting
+ensures no elements underflow.
+
+Compiler
+--------
+gcc (as of 4.4.5) has a difficult time optimizing the 32 bit C version properly. 
+icc produces code that is roughly 40% faster.

src/external/curve25519-donna/curve25519.c

@@ -0,0 +1,27 @@
+#include "curve25519-donna.h"
+
+#if !defined(CURVE25519_SUFFIX)
+#define CURVE25519_SUFFIX 
+#endif
+
+#define CURVE25519_FN3(fn,suffix) fn##suffix
+#define CURVE25519_FN2(fn,suffix) CURVE25519_FN3(fn,suffix)
+#define CURVE25519_FN(fn)         CURVE25519_FN2(fn,CURVE25519_SUFFIX)
+
+void
+CURVE25519_FN(curve25519_donna) (curve25519_key mypublic, const curve25519_key secret, const curve25519_key basepoint) {
+	curve25519_key e;
+	size_t i;
+
+	for (i = 0;i < 32;++i) e[i] = secret[i];
+	e[0] &= 0xf8;
+	e[31] &= 0x7f;
+	e[31] |= 0x40;
+	curve25519_scalarmult_donna(mypublic, e, basepoint);
+}
+
+void
+CURVE25519_FN(curve25519_donna_basepoint) (curve25519_key mypublic, const curve25519_key secret) {
+	static const curve25519_key basepoint = {9};
+	CURVE25519_FN(curve25519_donna)(mypublic, secret, basepoint);
+}

src/external/curve25519-donna/curve25519.h

@@ -0,0 +1,10 @@
+#ifndef CURVE25519_H
+#define CURVE25519_H
+
+typedef unsigned char curve25519_key[32];
+
+void curve25519_donna(curve25519_key mypublic, const curve25519_key secret, const curve25519_key basepoint);
+void curve25519_donna_basepoint(curve25519_key mypublic, const curve25519_key secret);
+
+#endif /* CURVE25519_H */
+

src/external/curve25519-donna/curve25519_VALVE_sse2.c

@@ -0,0 +1,8 @@
+/* The code for curve25519-donna comes from https://github.com/floodyberry/curve25519-donna
+   where it is explicitly placed in the public domain. This wrapper compiles it with the _sse2
+   function suffix to be distinguished from the native C version. */
+
+#define CURVE25519_SUFFIX _sse2
+#define CURVE25519_SSE2
+
+#include "curve25519.c"

src/external/curve25519-donna/readme_VALVE.txt

@@ -0,0 +1,12 @@
+curve25519-donna is an implementation of the Curve25519 ECDH key-exchange algorithm by Dan J Bernstein.
+
+curve25519 is a "256-bit strength" elliptical curve (equivalent to NIST P-256) with 32-byte secret/public keys.
+
+It is very fast, easy to implement securely in software, and fully public-domain.
+
+
+Downloaded 2/10/2016 from https://github.com/floodyberry/curve25519-donna
+
+
+
+Filenames containing VALVE are *not* entirely public domain - see individual files for details.

src/external/curve25519-donna/test-ticks.h

@@ -0,0 +1,50 @@
+#include "curve25519-donna-portable-identify.h"
+
+/* ticks - not tested on anything other than x86 */
+static uint64_t
+get_ticks(void) {
+#if defined(CPU_X86) || defined(CPU_X86_64)
+	#if defined(COMPILER_INTEL)
+		return _rdtsc();
+	#elif defined(COMPILER_MSVC)
+		return __rdtsc();
+	#elif defined(COMPILER_GCC)
+		uint32_t lo, hi;
+		__asm__ __volatile__("rdtsc" : "=a" (lo), "=d" (hi));
+		return ((uint64_t)lo | ((uint64_t)hi << 32));
+	#else
+		need rdtsc for this compiler
+	#endif
+#elif defined(OS_SOLARIS)
+	return (uint64_t)gethrtime();
+#elif defined(CPU_SPARC) && !defined(OS_OPENBSD)
+	uint64_t t;
+	__asm__ __volatile__("rd %%tick, %0" : "=r" (t));
+	return t;
+#elif defined(CPU_PPC)
+	uint32_t lo = 0, hi = 0;
+	__asm__ __volatile__("mftbu %0; mftb %1" : "=r" (hi), "=r" (lo));
+	return ((uint64_t)lo | ((uint64_t)hi << 32));
+#elif defined(CPU_IA64)
+	uint64_t t;
+	__asm__ __volatile__("mov %0=ar.itc" : "=r" (t));
+	return t;
+#elif defined(OS_NIX)
+	timeval t2;
+	gettimeofday(&t2, NULL);
+	t = ((uint64_t)t2.tv_usec << 32) | (uint64_t)t2.tv_sec;
+	return t;
+#else
+	need ticks for this platform
+#endif
+}
+
+#define timeit(x,minvar)         \
+	ticks = get_ticks();         \
+ 	x;                           \
+	ticks = get_ticks() - ticks; \
+	if (ticks < minvar)          \
+		minvar = ticks;
+
+#define maxticks 0xffffffffffffffffull
+

src/external/curve25519-donna/test.c

@@ -0,0 +1,105 @@
+/*
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "curve25519.h"
+
+#include "test-ticks.h"
+
+static void
+curveassert_die(const unsigned char *a, const unsigned char *b, size_t len, int round, const char *failreason) {
+	size_t i;
+	if (round > 0)
+		printf("round %d, %s\n", round, failreason);
+	else
+		printf("%s\n", failreason);
+	printf("want: "); for (i = 0; i < len; i++) printf("%02x,", a[i]); printf("\n");
+	printf("got : "); for (i = 0; i < len; i++) printf("%02x,", b[i]); printf("\n");
+	printf("diff: "); for (i = 0; i < len; i++) if (a[i] ^ b[i]) printf("%02x,", a[i] ^ b[i]); else printf("  ,"); printf("\n\n");
+	exit(1);
+}
+
+static void
+curveassert_equal(const unsigned char *a, const unsigned char *b, size_t len, const char *failreason) {
+	if (memcmp(a, b, len) == 0)
+		return;
+	curveassert_die(a, b, len, -1, failreason);
+}
+
+/* result of the curve25519 scalarmult |((|max| * |max|) * |max|)... 1024 times| * basepoint */
+
+/*
+static const curve25519_key curve25519_expected = {
+	0x8e,0x74,0xac,0x44,0x38,0xa6,0x87,0x54,
+	0xc8,0xc6,0x1b,0xa0,0x8b,0xd2,0xf7,0x7b,
+	0xbb,0xc6,0x26,0xd5,0x24,0xb3,0xbe,0xa0,
+	0x38,0x30,0x1d,0xec,0x2d,0x92,0xe7,0x51
+};
+*/
+
+/* this is the result if the 256th bit of a point is ignored:*/
+const curve25519_key curve25519_expected = {
+	0x1e,0x61,0x8e,0xc0,0x2f,0x25,0x1b,0x8d,
+	0x62,0xed,0x0e,0x57,0x3c,0x83,0x11,0x49,
+	0x7b,0xa5,0x85,0x40,0x1a,0xcf,0xd4,0x3e,
+	0x5b,0xeb,0xa8,0xb5,0xae,0x75,0x96,0x2d
+};
+
+
+/* shared key resulting from the private keys |max| and |mid| */
+static const curve25519_key curve25519_shared = {
+	0x78,0x0e,0x63,0xa6,0x58,0x5c,0x6d,0x56,
+	0xf1,0xa0,0x18,0x2d,0xec,0xe6,0x96,0x3b,
+	0x5b,0x4d,0x63,0x08,0x7b,0xf9,0x19,0x0e,
+	0x3a,0x77,0xf5,0x27,0x9c,0xd7,0x8b,0x44
+};
+
+
+static void
+test_main(void) {
+	int i;
+	static const curve25519_key max = {
+		255,255,255,255,255,255,255,255,
+		255,255,255,255,255,255,255,255,
+		255,255,255,255,255,255,255,255,
+		255,255,255,255,255,255,255,255
+	};
+	static const curve25519_key mid = {
+		127,127,127,127,127,127,127,127,
+		127,127,127,127,127,127,127,127,
+		127,127,127,127,127,127,127,127,
+		127,127,127,127,127,127,127,127
+	};
+	curve25519_key pk[2];
+	curve25519_key shared[2];
+	uint64_t ticks, curveticks = maxticks;
+
+	curve25519_donna(pk[0], max, max);
+	for (i = 0; i < 1023; i++)
+		curve25519_donna(pk[(i & 1) ^ 1], pk[i & 1], max);
+	curve25519_donna_basepoint(pk[0], pk[1]);
+	curveassert_equal(curve25519_expected, pk[0], sizeof(curve25519_key), "curve25519 sanity test failed to generate correct value");
+
+	curve25519_donna_basepoint(pk[0], max);
+	curve25519_donna_basepoint(pk[1], mid);
+	curve25519_donna(shared[0], max, pk[1]);
+	curve25519_donna(shared[1], mid, pk[0]);
+	curveassert_equal(curve25519_shared, shared[0], sizeof(curve25519_key), "curve25519 failed to generate the same shared key (1)");
+	curveassert_equal(curve25519_shared, shared[1], sizeof(curve25519_key), "curve25519 failed to generate the same shared key (2)");
+
+	for (i = 0; i < 2048; i++) {
+		timeit(curve25519_donna(pk[1], pk[0], max), curveticks);
+	}
+
+	printf("%.0f ticks/curve25519 scalarmult\n", (double)curveticks);
+}
+
+int
+main(void) {
+	test_main();
+	return 0;
+}
+

src/external/ed25519-donna/README.md

@@ -0,0 +1,183 @@
+[ed25519](http://ed25519.cr.yp.to/) is an 
+[Elliptic Curve Digital Signature Algortithm](http://en.wikipedia.org/wiki/Elliptic_Curve_DSA), 
+developed by [Dan Bernstein](http://cr.yp.to/djb.html), 
+[Niels Duif](http://www.nielsduif.nl/), 
+[Tanja Lange](http://hyperelliptic.org/tanja), 
+[Peter Schwabe](http://www.cryptojedi.org/users/peter/), 
+and [Bo-Yin Yang](http://www.iis.sinica.edu.tw/pages/byyang/).
+
+This project provides performant, portable 32-bit & 64-bit implementations. All implementations are 
+of course constant time in regard to secret data.
+
+#### Performance
+
+SSE2 code and benches have not been updated yet. I will do those next.
+
+Compilers versions are gcc 4.6.3, icc 13.1.1, clang 3.4-1~exp1.
+
+Batch verfication time (in parentheses) is the average time per 1 verification in a batch of 64 signatures. Counts are in thousands of cycles.
+
+Note that SSE2 performance may be less impressive on AMD & older CPUs with slower SSE ops!
+
+Visual Studio performance for `ge25519_scalarmult_base_niels` will lag behind a bit until optimized assembler versions of `ge25519_scalarmult_base_choose_niels`
+are made.
+
+##### E5200 @ 2.5ghz, march=core2
+
+<table>
+<thead><tr><th>Implementation</th><th>Sign</th><th>gcc</th><th>icc</th><th>clang</th><th>Verify</th><th>gcc</th><th>icc</th><th>clang</th></tr></thead>
+<tbody>
+<tr><td>ed25519-donna 64bit     </td><td></td><td>100k</td><td>110k</td><td>137k</td><td></td><td>327k (144k) </td><td>342k (163k) </td><td>422k (194k) </td></tr>
+<tr><td>amd64-64-24k            </td><td></td><td>102k</td><td>    </td><td>    </td><td></td><td>355k (158k) </td><td>            </td><td>            </td></tr>
+<tr><td>ed25519-donna-sse2 64bit</td><td></td><td>108k</td><td>111k</td><td>116k</td><td></td><td>353k (155k) </td><td>345k (154k) </td><td>360k (161k) </td></tr>
+<tr><td>amd64-51-32k            </td><td></td><td>116k</td><td>    </td><td>    </td><td></td><td>380k (175k) </td><td>            </td><td>            </td></tr>
+<tr><td>ed25519-donna-sse2 32bit</td><td></td><td>147k</td><td>147k</td><td>156k</td><td></td><td>380k (178k) </td><td>381k (173k) </td><td>430k (192k) </td></tr>
+<tr><td>ed25519-donna 32bit     </td><td></td><td>597k</td><td>335k</td><td>380k</td><td></td><td>1693k (720k)</td><td>1052k (453k)</td><td>1141k (493k)</td></tr>
+</tbody>
+</table>
+
+##### E3-1270 @ 3.4ghz, march=corei7-avx
+
+<table>
+<thead><tr><th>Implementation</th><th>Sign</th><th>gcc</th><th>icc</th><th>clang</th><th>Verify</th><th>gcc</th><th>icc</th><th>clang</th></tr></thead>
+<tbody>
+<tr><td>amd64-64-24k            </td><td></td><td> 68k</td><td>    </td><td>    </td><td></td><td>225k (104k) </td><td>            </td><td>            </td></tr>
+<tr><td>ed25519-donna 64bit     </td><td></td><td> 71k</td><td> 75k</td><td> 90k</td><td></td><td>226k (105k) </td><td>226k (112k) </td><td>277k (125k) </td></tr>
+<tr><td>amd64-51-32k            </td><td></td><td> 72k</td><td>    </td><td>    </td><td></td><td>218k (107k) </td><td>            </td><td>            </td></tr>
+<tr><td>ed25519-donna-sse2 64bit</td><td></td><td> 79k</td><td> 82k</td><td> 92k</td><td></td><td>252k (122k) </td><td>259k (124k) </td><td>282k (131k) </td></tr>
+<tr><td>ed25519-donna-sse2 32bit</td><td></td><td> 94k</td><td> 95k</td><td>103k</td><td></td><td>296k (146k) </td><td>294k (137k) </td><td>306k (147k) </td></tr>
+<tr><td>ed25519-donna 32bit     </td><td></td><td>525k</td><td>299k</td><td>316k</td><td></td><td>1502k (645k)</td><td>959k (418k) </td><td>954k (416k) </td></tr>
+</tbody>
+</table>
+
+#### Compilation
+
+No configuration is needed **if you are compiling against OpenSSL**. 
+
+##### Hash Options
+
+If you are not compiling aginst OpenSSL, you will need a hash function.
+
+To use a simple/**slow** implementation of SHA-512, use `-DED25519_REFHASH` when compiling `ed25519.c`. 
+This should never be used except to verify the code works when OpenSSL is not available.
+
+To use a custom hash function, use `-DED25519_CUSTOMHASH` when compiling `ed25519.c` and put your 
+custom hash implementation in ed25519-hash-custom.h. The hash must have a 512bit digest and implement
+
+	struct ed25519_hash_context;
+
+	void ed25519_hash_init(ed25519_hash_context *ctx);
+	void ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen);
+	void ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash);
+	void ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen);
+
+##### Random Options
+
+If you are not compiling aginst OpenSSL, you will need a random function for batch verification.
+
+To use a custom random function, use `-DED25519_CUSTOMRANDOM` when compiling `ed25519.c` and put your 
+custom hash implementation in ed25519-randombytes-custom.h. The random function must implement:
+
+	void ED25519_FN(ed25519_randombytes_unsafe) (void *p, size_t len);
+
+Use `-DED25519_TEST` when compiling `ed25519.c` to use a deterministically seeded, non-thread safe CSPRNG 
+variant of Bob Jenkins [ISAAC](http://en.wikipedia.org/wiki/ISAAC_%28cipher%29)
+
+##### Minor options
+
+Use `-DED25519_INLINE_ASM` to disable the use of custom assembler routines and instead rely on portable C.
+
+Use `-DED25519_FORCE_32BIT` to force the use of 32 bit routines even when compiling for 64 bit.
+
+##### 32-bit
+
+	gcc ed25519.c -m32 -O3 -c
+
+##### 64-bit
+
+	gcc ed25519.c -m64 -O3 -c
+
+##### SSE2
+
+	gcc ed25519.c -m32 -O3 -c -DED25519_SSE2 -msse2
+	gcc ed25519.c -m64 -O3 -c -DED25519_SSE2
+
+clang and icc are also supported
+
+
+#### Usage
+
+To use the code, link against `ed25519.o -mbits` and:
+
+	#include "ed25519.h"
+
+Add `-lssl -lcrypto` when using OpenSSL (Some systems don't need -lcrypto? It might be trial and error).
+
+To generate a private key, simply generate 32 bytes from a secure
+cryptographic source:
+
+	ed25519_secret_key sk;
+	randombytes(sk, sizeof(ed25519_secret_key));
+
+To generate a public key:
+
+	ed25519_public_key pk;
+	ed25519_publickey(sk, pk);
+
+To sign a message:
+
+	ed25519_signature sig;
+	ed25519_sign(message, message_len, sk, pk, signature);
+
+To verify a signature:
+
+	int valid = ed25519_sign_open(message, message_len, pk, signature) == 0;
+
+To batch verify signatures:
+
+	const unsigned char *mp[num] = {message1, message2..}
+	size_t ml[num] = {message_len1, message_len2..}
+	const unsigned char *pkp[num] = {pk1, pk2..}
+	const unsigned char *sigp[num] = {signature1, signature2..}
+	int valid[num]
+
+	/* valid[i] will be set to 1 if the individual signature was valid, 0 otherwise */
+	int all_valid = ed25519_sign_open_batch(mp, ml, pkp, sigp, num, valid) == 0;
+
+**Note**: Batch verification uses `ed25519_randombytes_unsafe`, implemented in 
+`ed25519-randombytes.h`, to generate random scalars for the verification code. 
+The default implementation now uses OpenSSLs `RAND_bytes`.
+
+Unlike the [SUPERCOP](http://bench.cr.yp.to/supercop.html) version, signatures are
+not appended to messages, and there is no need for padding in front of messages. 
+Additionally, the secret key does not contain a copy of the public key, so it is 
+32 bytes instead of 64 bytes, and the public key must be provided to the signing
+function.
+
+##### Curve25519
+
+Curve25519 public keys can be generated thanks to 
+[Adam Langley](http://www.imperialviolet.org/2013/05/10/fastercurve25519.html) 
+leveraging Ed25519's precomputed basepoint scalar multiplication.
+
+	curved25519_key sk, pk;
+	randombytes(sk, sizeof(curved25519_key));
+	curved25519_scalarmult_basepoint(pk, sk);
+
+Note the name is curved25519, a combination of curve and ed25519, to prevent 
+name clashes. Performance is slightly faster than short message ed25519
+signing due to both using the same code for the scalar multiply.
+
+#### Testing
+
+Fuzzing against reference implemenations is now available. See [fuzz/README](fuzz/README.md).
+
+Building `ed25519.c` with `-DED25519_TEST` and linking with `test.c` will run basic sanity tests
+and benchmark each function. `test-batch.c` has been incorporated in to `test.c`.
+
+`test-internals.c` is standalone and built the same way as `ed25519.c`. It tests the math primitives
+with extreme values to ensure they function correctly. SSE2 is now supported.
+
+#### Papers
+
+[Available on the Ed25519 website](http://ed25519.cr.yp.to/papers.html)

src/external/ed25519-donna/curve25519-donna-32bit.h

@@ -0,0 +1,579 @@
+/*
+	Public domain by Andrew M. <liquidsun@gmail.com>
+	See: https://github.com/floodyberry/curve25519-donna
+
+	32 bit integer curve25519 implementation
+*/
+
+typedef uint32_t bignum25519[10];
+typedef uint32_t bignum25519align16[12];
+
+static const uint32_t reduce_mask_25 = (1 << 25) - 1;
+static const uint32_t reduce_mask_26 = (1 << 26) - 1;
+
+
+/* out = in */
+DONNA_INLINE static void
+curve25519_copy(bignum25519 out, const bignum25519 in) {
+	out[0] = in[0];
+	out[1] = in[1];
+	out[2] = in[2];
+	out[3] = in[3];
+	out[4] = in[4];
+	out[5] = in[5];
+	out[6] = in[6];
+	out[7] = in[7];
+	out[8] = in[8];
+	out[9] = in[9];
+}
+
+/* out = a + b */
+DONNA_INLINE static void
+curve25519_add(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + b[0];
+	out[1] = a[1] + b[1];
+	out[2] = a[2] + b[2];
+	out[3] = a[3] + b[3];
+	out[4] = a[4] + b[4];
+	out[5] = a[5] + b[5];
+	out[6] = a[6] + b[6];
+	out[7] = a[7] + b[7];
+	out[8] = a[8] + b[8];
+	out[9] = a[9] + b[9];
+}
+
+DONNA_INLINE static void 
+curve25519_add_after_basic(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t c;
+	out[0] = a[0] + b[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = a[1] + b[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = a[2] + b[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = a[3] + b[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = a[4] + b[4] + c; c = (out[4] >> 26); out[4] &= reduce_mask_26;
+	out[5] = a[5] + b[5] + c; c = (out[5] >> 25); out[5] &= reduce_mask_25;
+	out[6] = a[6] + b[6] + c; c = (out[6] >> 26); out[6] &= reduce_mask_26;
+	out[7] = a[7] + b[7] + c; c = (out[7] >> 25); out[7] &= reduce_mask_25;
+	out[8] = a[8] + b[8] + c; c = (out[8] >> 26); out[8] &= reduce_mask_26;
+	out[9] = a[9] + b[9] + c; c = (out[9] >> 25); out[9] &= reduce_mask_25;
+	out[0] += 19 * c;
+}
+
+DONNA_INLINE static void
+curve25519_add_reduce(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t c;
+	out[0] = a[0] + b[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = a[1] + b[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = a[2] + b[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = a[3] + b[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = a[4] + b[4] + c; c = (out[4] >> 26); out[4] &= reduce_mask_26;
+	out[5] = a[5] + b[5] + c; c = (out[5] >> 25); out[5] &= reduce_mask_25;
+	out[6] = a[6] + b[6] + c; c = (out[6] >> 26); out[6] &= reduce_mask_26;
+	out[7] = a[7] + b[7] + c; c = (out[7] >> 25); out[7] &= reduce_mask_25;
+	out[8] = a[8] + b[8] + c; c = (out[8] >> 26); out[8] &= reduce_mask_26;
+	out[9] = a[9] + b[9] + c; c = (out[9] >> 25); out[9] &= reduce_mask_25;
+	out[0] += 19 * c;
+}
+
+/* multiples of p */
+static const uint32_t twoP0       = 0x07ffffda;
+static const uint32_t twoP13579   = 0x03fffffe;
+static const uint32_t twoP2468    = 0x07fffffe;
+static const uint32_t fourP0      = 0x0fffffb4;
+static const uint32_t fourP13579  = 0x07fffffc;
+static const uint32_t fourP2468   = 0x0ffffffc;
+
+/* out = a - b */
+DONNA_INLINE static void
+curve25519_sub(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t c;
+	out[0] = twoP0     + a[0] - b[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = twoP13579 + a[1] - b[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = twoP2468  + a[2] - b[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = twoP13579 + a[3] - b[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = twoP2468  + a[4] - b[4] + c;
+	out[5] = twoP13579 + a[5] - b[5]    ;
+	out[6] = twoP2468  + a[6] - b[6]    ;
+	out[7] = twoP13579 + a[7] - b[7]    ;
+	out[8] = twoP2468  + a[8] - b[8]    ;
+	out[9] = twoP13579 + a[9] - b[9]    ;
+}
+
+/* out = a - b, where a is the result of a basic op (add,sub) */
+DONNA_INLINE static void
+curve25519_sub_after_basic(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t c;
+	out[0] = fourP0     + a[0] - b[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = fourP13579 + a[1] - b[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = fourP2468  + a[2] - b[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = fourP13579 + a[3] - b[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = fourP2468  + a[4] - b[4] + c; c = (out[4] >> 26); out[4] &= reduce_mask_26;
+	out[5] = fourP13579 + a[5] - b[5] + c; c = (out[5] >> 25); out[5] &= reduce_mask_25;
+	out[6] = fourP2468  + a[6] - b[6] + c; c = (out[6] >> 26); out[6] &= reduce_mask_26;
+	out[7] = fourP13579 + a[7] - b[7] + c; c = (out[7] >> 25); out[7] &= reduce_mask_25;
+	out[8] = fourP2468  + a[8] - b[8] + c; c = (out[8] >> 26); out[8] &= reduce_mask_26;
+	out[9] = fourP13579 + a[9] - b[9] + c; c = (out[9] >> 25); out[9] &= reduce_mask_25;
+	out[0] += 19 * c;
+}
+
+DONNA_INLINE static void
+curve25519_sub_reduce(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t c;
+	out[0] = fourP0     + a[0] - b[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = fourP13579 + a[1] - b[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = fourP2468  + a[2] - b[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = fourP13579 + a[3] - b[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = fourP2468  + a[4] - b[4] + c; c = (out[4] >> 26); out[4] &= reduce_mask_26;
+	out[5] = fourP13579 + a[5] - b[5] + c; c = (out[5] >> 25); out[5] &= reduce_mask_25;
+	out[6] = fourP2468  + a[6] - b[6] + c; c = (out[6] >> 26); out[6] &= reduce_mask_26;
+	out[7] = fourP13579 + a[7] - b[7] + c; c = (out[7] >> 25); out[7] &= reduce_mask_25;
+	out[8] = fourP2468  + a[8] - b[8] + c; c = (out[8] >> 26); out[8] &= reduce_mask_26;
+	out[9] = fourP13579 + a[9] - b[9] + c; c = (out[9] >> 25); out[9] &= reduce_mask_25;
+	out[0] += 19 * c;
+}
+
+/* out = -a */
+DONNA_INLINE static void
+curve25519_neg(bignum25519 out, const bignum25519 a) {
+	uint32_t c;
+	out[0] = twoP0     - a[0]    ; c = (out[0] >> 26); out[0] &= reduce_mask_26;
+	out[1] = twoP13579 - a[1] + c; c = (out[1] >> 25); out[1] &= reduce_mask_25;
+	out[2] = twoP2468  - a[2] + c; c = (out[2] >> 26); out[2] &= reduce_mask_26;
+	out[3] = twoP13579 - a[3] + c; c = (out[3] >> 25); out[3] &= reduce_mask_25;
+	out[4] = twoP2468  - a[4] + c; c = (out[4] >> 26); out[4] &= reduce_mask_26;
+	out[5] = twoP13579 - a[5] + c; c = (out[5] >> 25); out[5] &= reduce_mask_25;
+	out[6] = twoP2468  - a[6] + c; c = (out[6] >> 26); out[6] &= reduce_mask_26;
+	out[7] = twoP13579 - a[7] + c; c = (out[7] >> 25); out[7] &= reduce_mask_25;
+	out[8] = twoP2468  - a[8] + c; c = (out[8] >> 26); out[8] &= reduce_mask_26;
+	out[9] = twoP13579 - a[9] + c; c = (out[9] >> 25); out[9] &= reduce_mask_25;
+	out[0] += 19 * c;
+}
+
+/* out = a * b */
+#define curve25519_mul_noinline curve25519_mul
+static void
+curve25519_mul(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint32_t r0,r1,r2,r3,r4,r5,r6,r7,r8,r9;
+	uint32_t s0,s1,s2,s3,s4,s5,s6,s7,s8,s9;
+	uint64_t m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,c;
+	uint32_t p;
+
+	r0 = b[0];
+	r1 = b[1];
+	r2 = b[2];
+	r3 = b[3];
+	r4 = b[4];
+	r5 = b[5];
+	r6 = b[6];
+	r7 = b[7];
+	r8 = b[8];
+	r9 = b[9];
+
+	s0 = a[0];
+	s1 = a[1];
+	s2 = a[2];
+	s3 = a[3];
+	s4 = a[4];
+	s5 = a[5];
+	s6 = a[6];
+	s7 = a[7];
+	s8 = a[8];
+	s9 = a[9];
+
+	m1 = mul32x32_64(r0, s1) + mul32x32_64(r1, s0);
+	m3 = mul32x32_64(r0, s3) + mul32x32_64(r1, s2) + mul32x32_64(r2, s1) + mul32x32_64(r3, s0);
+	m5 = mul32x32_64(r0, s5) + mul32x32_64(r1, s4) + mul32x32_64(r2, s3) + mul32x32_64(r3, s2) + mul32x32_64(r4, s1) + mul32x32_64(r5, s0);
+	m7 = mul32x32_64(r0, s7) + mul32x32_64(r1, s6) + mul32x32_64(r2, s5) + mul32x32_64(r3, s4) + mul32x32_64(r4, s3) + mul32x32_64(r5, s2) + mul32x32_64(r6, s1) + mul32x32_64(r7, s0);
+	m9 = mul32x32_64(r0, s9) + mul32x32_64(r1, s8) + mul32x32_64(r2, s7) + mul32x32_64(r3, s6) + mul32x32_64(r4, s5) + mul32x32_64(r5, s4) + mul32x32_64(r6, s3) + mul32x32_64(r7, s2) + mul32x32_64(r8, s1) + mul32x32_64(r9, s0);
+
+	r1 *= 2;
+	r3 *= 2;
+	r5 *= 2;
+	r7 *= 2;
+
+	m0 = mul32x32_64(r0, s0);
+	m2 = mul32x32_64(r0, s2) + mul32x32_64(r1, s1) + mul32x32_64(r2, s0);
+	m4 = mul32x32_64(r0, s4) + mul32x32_64(r1, s3) + mul32x32_64(r2, s2) + mul32x32_64(r3, s1) + mul32x32_64(r4, s0);
+	m6 = mul32x32_64(r0, s6) + mul32x32_64(r1, s5) + mul32x32_64(r2, s4) + mul32x32_64(r3, s3) + mul32x32_64(r4, s2) + mul32x32_64(r5, s1) + mul32x32_64(r6, s0);
+	m8 = mul32x32_64(r0, s8) + mul32x32_64(r1, s7) + mul32x32_64(r2, s6) + mul32x32_64(r3, s5) + mul32x32_64(r4, s4) + mul32x32_64(r5, s3) + mul32x32_64(r6, s2) + mul32x32_64(r7, s1) + mul32x32_64(r8, s0);
+
+	r1 *= 19;
+	r2 *= 19;
+	r3 = (r3 / 2) * 19;
+	r4 *= 19;
+	r5 = (r5 / 2) * 19;
+	r6 *= 19;
+	r7 = (r7 / 2) * 19;
+	r8 *= 19;
+	r9 *= 19;
+
+	m1 += (mul32x32_64(r9, s2) + mul32x32_64(r8, s3) + mul32x32_64(r7, s4) + mul32x32_64(r6, s5) + mul32x32_64(r5, s6) + mul32x32_64(r4, s7) + mul32x32_64(r3, s8) + mul32x32_64(r2, s9));
+	m3 += (mul32x32_64(r9, s4) + mul32x32_64(r8, s5) + mul32x32_64(r7, s6) + mul32x32_64(r6, s7) + mul32x32_64(r5, s8) + mul32x32_64(r4, s9));
+	m5 += (mul32x32_64(r9, s6) + mul32x32_64(r8, s7) + mul32x32_64(r7, s8) + mul32x32_64(r6, s9));
+	m7 += (mul32x32_64(r9, s8) + mul32x32_64(r8, s9));
+
+	r3 *= 2;
+	r5 *= 2;
+	r7 *= 2;
+	r9 *= 2;
+
+	m0 += (mul32x32_64(r9, s1) + mul32x32_64(r8, s2) + mul32x32_64(r7, s3) + mul32x32_64(r6, s4) + mul32x32_64(r5, s5) + mul32x32_64(r4, s6) + mul32x32_64(r3, s7) + mul32x32_64(r2, s8) + mul32x32_64(r1, s9));
+	m2 += (mul32x32_64(r9, s3) + mul32x32_64(r8, s4) + mul32x32_64(r7, s5) + mul32x32_64(r6, s6) + mul32x32_64(r5, s7) + mul32x32_64(r4, s8) + mul32x32_64(r3, s9));
+	m4 += (mul32x32_64(r9, s5) + mul32x32_64(r8, s6) + mul32x32_64(r7, s7) + mul32x32_64(r6, s8) + mul32x32_64(r5, s9));
+	m6 += (mul32x32_64(r9, s7) + mul32x32_64(r8, s8) + mul32x32_64(r7, s9));
+	m8 += (mul32x32_64(r9, s9));
+
+	                             r0 = (uint32_t)m0 & reduce_mask_26; c = (m0 >> 26);
+	m1 += c;                     r1 = (uint32_t)m1 & reduce_mask_25; c = (m1 >> 25);
+	m2 += c;                     r2 = (uint32_t)m2 & reduce_mask_26; c = (m2 >> 26);
+	m3 += c;                     r3 = (uint32_t)m3 & reduce_mask_25; c = (m3 >> 25);
+	m4 += c;                     r4 = (uint32_t)m4 & reduce_mask_26; c = (m4 >> 26);
+	m5 += c;                     r5 = (uint32_t)m5 & reduce_mask_25; c = (m5 >> 25);
+	m6 += c;                     r6 = (uint32_t)m6 & reduce_mask_26; c = (m6 >> 26);
+	m7 += c;                     r7 = (uint32_t)m7 & reduce_mask_25; c = (m7 >> 25);
+	m8 += c;                     r8 = (uint32_t)m8 & reduce_mask_26; c = (m8 >> 26);
+	m9 += c;                     r9 = (uint32_t)m9 & reduce_mask_25; p = (uint32_t)(m9 >> 25);
+	m0 = r0 + mul32x32_64(p,19); r0 = (uint32_t)m0 & reduce_mask_26; p = (uint32_t)(m0 >> 26);
+	r1 += p;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+	out[5] = r5;
+	out[6] = r6;
+	out[7] = r7;
+	out[8] = r8;
+	out[9] = r9;
+}
+
+/* out = in*in */
+static void
+curve25519_square(bignum25519 out, const bignum25519 in) {
+	uint32_t r0,r1,r2,r3,r4,r5,r6,r7,r8,r9;
+	uint32_t d6,d7,d8,d9;
+	uint64_t m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,c;
+	uint32_t p;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+	r5 = in[5];
+	r6 = in[6];
+	r7 = in[7];
+	r8 = in[8];
+	r9 = in[9];
+
+	m0 = mul32x32_64(r0, r0);
+	r0 *= 2;
+	m1 = mul32x32_64(r0, r1);
+	m2 = mul32x32_64(r0, r2) + mul32x32_64(r1, r1 * 2);
+	r1 *= 2;
+	m3 = mul32x32_64(r0, r3) + mul32x32_64(r1, r2    );
+	m4 = mul32x32_64(r0, r4) + mul32x32_64(r1, r3 * 2) + mul32x32_64(r2, r2);
+	r2 *= 2;
+	m5 = mul32x32_64(r0, r5) + mul32x32_64(r1, r4    ) + mul32x32_64(r2, r3);
+	m6 = mul32x32_64(r0, r6) + mul32x32_64(r1, r5 * 2) + mul32x32_64(r2, r4) + mul32x32_64(r3, r3 * 2);
+	r3 *= 2;
+	m7 = mul32x32_64(r0, r7) + mul32x32_64(r1, r6    ) + mul32x32_64(r2, r5) + mul32x32_64(r3, r4    );
+	m8 = mul32x32_64(r0, r8) + mul32x32_64(r1, r7 * 2) + mul32x32_64(r2, r6) + mul32x32_64(r3, r5 * 2) + mul32x32_64(r4, r4    );
+	m9 = mul32x32_64(r0, r9) + mul32x32_64(r1, r8    ) + mul32x32_64(r2, r7) + mul32x32_64(r3, r6    ) + mul32x32_64(r4, r5 * 2);
+
+	d6 = r6 * 19;
+	d7 = r7 * 2 * 19;
+	d8 = r8 * 19;
+	d9 = r9 * 2 * 19;
+
+	m0 += (mul32x32_64(d9, r1    ) + mul32x32_64(d8, r2    ) + mul32x32_64(d7, r3    ) + mul32x32_64(d6, r4 * 2) + mul32x32_64(r5, r5 * 2 * 19));
+	m1 += (mul32x32_64(d9, r2 / 2) + mul32x32_64(d8, r3    ) + mul32x32_64(d7, r4    ) + mul32x32_64(d6, r5 * 2));
+	m2 += (mul32x32_64(d9, r3    ) + mul32x32_64(d8, r4 * 2) + mul32x32_64(d7, r5 * 2) + mul32x32_64(d6, r6    ));
+	m3 += (mul32x32_64(d9, r4    ) + mul32x32_64(d8, r5 * 2) + mul32x32_64(d7, r6    ));
+	m4 += (mul32x32_64(d9, r5 * 2) + mul32x32_64(d8, r6 * 2) + mul32x32_64(d7, r7    ));
+	m5 += (mul32x32_64(d9, r6    ) + mul32x32_64(d8, r7 * 2));
+	m6 += (mul32x32_64(d9, r7 * 2) + mul32x32_64(d8, r8    ));
+	m7 += (mul32x32_64(d9, r8    ));
+	m8 += (mul32x32_64(d9, r9    ));
+
+	                             r0 = (uint32_t)m0 & reduce_mask_26; c = (m0 >> 26);
+	m1 += c;                     r1 = (uint32_t)m1 & reduce_mask_25; c = (m1 >> 25);
+	m2 += c;                     r2 = (uint32_t)m2 & reduce_mask_26; c = (m2 >> 26);
+	m3 += c;                     r3 = (uint32_t)m3 & reduce_mask_25; c = (m3 >> 25);
+	m4 += c;                     r4 = (uint32_t)m4 & reduce_mask_26; c = (m4 >> 26);
+	m5 += c;                     r5 = (uint32_t)m5 & reduce_mask_25; c = (m5 >> 25);
+	m6 += c;                     r6 = (uint32_t)m6 & reduce_mask_26; c = (m6 >> 26);
+	m7 += c;                     r7 = (uint32_t)m7 & reduce_mask_25; c = (m7 >> 25);
+	m8 += c;                     r8 = (uint32_t)m8 & reduce_mask_26; c = (m8 >> 26);
+	m9 += c;                     r9 = (uint32_t)m9 & reduce_mask_25; p = (uint32_t)(m9 >> 25);
+	m0 = r0 + mul32x32_64(p,19); r0 = (uint32_t)m0 & reduce_mask_26; p = (uint32_t)(m0 >> 26);
+	r1 += p;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+	out[5] = r5;
+	out[6] = r6;
+	out[7] = r7;
+	out[8] = r8;
+	out[9] = r9;
+}
+
+
+/* out = in ^ (2 * count) */
+static void
+curve25519_square_times(bignum25519 out, const bignum25519 in, int count) {
+	uint32_t r0,r1,r2,r3,r4,r5,r6,r7,r8,r9;
+	uint32_t d6,d7,d8,d9;
+	uint64_t m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,c;
+	uint32_t p;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+	r5 = in[5];
+	r6 = in[6];
+	r7 = in[7];
+	r8 = in[8];
+	r9 = in[9];
+
+	do {
+		m0 = mul32x32_64(r0, r0);
+		r0 *= 2;
+		m1 = mul32x32_64(r0, r1);
+		m2 = mul32x32_64(r0, r2) + mul32x32_64(r1, r1 * 2);
+		r1 *= 2;
+		m3 = mul32x32_64(r0, r3) + mul32x32_64(r1, r2    );
+		m4 = mul32x32_64(r0, r4) + mul32x32_64(r1, r3 * 2) + mul32x32_64(r2, r2);
+		r2 *= 2;
+		m5 = mul32x32_64(r0, r5) + mul32x32_64(r1, r4    ) + mul32x32_64(r2, r3);
+		m6 = mul32x32_64(r0, r6) + mul32x32_64(r1, r5 * 2) + mul32x32_64(r2, r4) + mul32x32_64(r3, r3 * 2);
+		r3 *= 2;
+		m7 = mul32x32_64(r0, r7) + mul32x32_64(r1, r6    ) + mul32x32_64(r2, r5) + mul32x32_64(r3, r4    );
+		m8 = mul32x32_64(r0, r8) + mul32x32_64(r1, r7 * 2) + mul32x32_64(r2, r6) + mul32x32_64(r3, r5 * 2) + mul32x32_64(r4, r4    );
+		m9 = mul32x32_64(r0, r9) + mul32x32_64(r1, r8    ) + mul32x32_64(r2, r7) + mul32x32_64(r3, r6    ) + mul32x32_64(r4, r5 * 2);
+
+		d6 = r6 * 19;
+		d7 = r7 * 2 * 19;
+		d8 = r8 * 19;
+		d9 = r9 * 2 * 19;
+
+		m0 += (mul32x32_64(d9, r1    ) + mul32x32_64(d8, r2    ) + mul32x32_64(d7, r3    ) + mul32x32_64(d6, r4 * 2) + mul32x32_64(r5, r5 * 2 * 19));
+		m1 += (mul32x32_64(d9, r2 / 2) + mul32x32_64(d8, r3    ) + mul32x32_64(d7, r4    ) + mul32x32_64(d6, r5 * 2));
+		m2 += (mul32x32_64(d9, r3    ) + mul32x32_64(d8, r4 * 2) + mul32x32_64(d7, r5 * 2) + mul32x32_64(d6, r6    ));
+		m3 += (mul32x32_64(d9, r4    ) + mul32x32_64(d8, r5 * 2) + mul32x32_64(d7, r6    ));
+		m4 += (mul32x32_64(d9, r5 * 2) + mul32x32_64(d8, r6 * 2) + mul32x32_64(d7, r7    ));
+		m5 += (mul32x32_64(d9, r6    ) + mul32x32_64(d8, r7 * 2));
+		m6 += (mul32x32_64(d9, r7 * 2) + mul32x32_64(d8, r8    ));
+		m7 += (mul32x32_64(d9, r8    ));
+		m8 += (mul32x32_64(d9, r9    ));
+
+		                             r0 = (uint32_t)m0 & reduce_mask_26; c = (m0 >> 26);
+		m1 += c;                     r1 = (uint32_t)m1 & reduce_mask_25; c = (m1 >> 25);
+		m2 += c;                     r2 = (uint32_t)m2 & reduce_mask_26; c = (m2 >> 26);
+		m3 += c;                     r3 = (uint32_t)m3 & reduce_mask_25; c = (m3 >> 25);
+		m4 += c;                     r4 = (uint32_t)m4 & reduce_mask_26; c = (m4 >> 26);
+		m5 += c;                     r5 = (uint32_t)m5 & reduce_mask_25; c = (m5 >> 25);
+		m6 += c;                     r6 = (uint32_t)m6 & reduce_mask_26; c = (m6 >> 26);
+		m7 += c;                     r7 = (uint32_t)m7 & reduce_mask_25; c = (m7 >> 25);
+		m8 += c;                     r8 = (uint32_t)m8 & reduce_mask_26; c = (m8 >> 26);
+		m9 += c;                     r9 = (uint32_t)m9 & reduce_mask_25; p = (uint32_t)(m9 >> 25);
+		m0 = r0 + mul32x32_64(p,19); r0 = (uint32_t)m0 & reduce_mask_26; p = (uint32_t)(m0 >> 26);
+		r1 += p;
+	} while (--count);
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+	out[5] = r5;
+	out[6] = r6;
+	out[7] = r7;
+	out[8] = r8;
+	out[9] = r9;
+}
+
+/* Take a little-endian, 32-byte number and expand it into polynomial form */
+static void
+curve25519_expand(bignum25519 out, const unsigned char in[32]) {
+	static const union { uint8_t b[2]; uint16_t s; } endian_check = {{1,0}};
+	uint32_t x0,x1,x2,x3,x4,x5,x6,x7;
+
+	if (endian_check.s == 1) {
+		x0 = *(uint32_t *)(in + 0);
+		x1 = *(uint32_t *)(in + 4);
+		x2 = *(uint32_t *)(in + 8);
+		x3 = *(uint32_t *)(in + 12);
+		x4 = *(uint32_t *)(in + 16);
+		x5 = *(uint32_t *)(in + 20);
+		x6 = *(uint32_t *)(in + 24);
+		x7 = *(uint32_t *)(in + 28);
+    } else {
+		#define F(s)                         \
+			((((uint32_t)in[s + 0])      ) | \
+			 (((uint32_t)in[s + 1]) <<  8) | \
+			 (((uint32_t)in[s + 2]) << 16) | \
+			 (((uint32_t)in[s + 3]) << 24))
+		x0 = F(0);
+		x1 = F(4);
+		x2 = F(8);
+		x3 = F(12);
+		x4 = F(16);
+		x5 = F(20);
+		x6 = F(24);
+		x7 = F(28);
+		#undef F
+	}
+
+	out[0] = (                        x0       ) & 0x3ffffff;
+	out[1] = ((((uint64_t)x1 << 32) | x0) >> 26) & 0x1ffffff;
+	out[2] = ((((uint64_t)x2 << 32) | x1) >> 19) & 0x3ffffff;
+	out[3] = ((((uint64_t)x3 << 32) | x2) >> 13) & 0x1ffffff;
+	out[4] = ((                       x3) >>  6) & 0x3ffffff;
+	out[5] = (                        x4       ) & 0x1ffffff;
+	out[6] = ((((uint64_t)x5 << 32) | x4) >> 25) & 0x3ffffff;
+	out[7] = ((((uint64_t)x6 << 32) | x5) >> 19) & 0x1ffffff;
+	out[8] = ((((uint64_t)x7 << 32) | x6) >> 12) & 0x3ffffff;
+	out[9] = ((                       x7) >>  6) & 0x1ffffff;
+}
+
+/* Take a fully reduced polynomial form number and contract it into a
+ * little-endian, 32-byte array
+ */
+static void
+curve25519_contract(unsigned char out[32], const bignum25519 in) {
+	bignum25519 f;
+	curve25519_copy(f, in);
+
+	#define carry_pass() \
+		f[1] += f[0] >> 26; f[0] &= reduce_mask_26; \
+		f[2] += f[1] >> 25; f[1] &= reduce_mask_25; \
+		f[3] += f[2] >> 26; f[2] &= reduce_mask_26; \
+		f[4] += f[3] >> 25; f[3] &= reduce_mask_25; \
+		f[5] += f[4] >> 26; f[4] &= reduce_mask_26; \
+		f[6] += f[5] >> 25; f[5] &= reduce_mask_25; \
+		f[7] += f[6] >> 26; f[6] &= reduce_mask_26; \
+		f[8] += f[7] >> 25; f[7] &= reduce_mask_25; \
+		f[9] += f[8] >> 26; f[8] &= reduce_mask_26;
+
+	#define carry_pass_full() \
+		carry_pass() \
+		f[0] += 19 * (f[9] >> 25); f[9] &= reduce_mask_25;
+
+	#define carry_pass_final() \
+		carry_pass() \
+		f[9] &= reduce_mask_25;
+
+	carry_pass_full()
+	carry_pass_full()
+
+	/* now t is between 0 and 2^255-1, properly carried. */
+	/* case 1: between 0 and 2^255-20. case 2: between 2^255-19 and 2^255-1. */
+	f[0] += 19;
+	carry_pass_full()
+
+	/* now between 19 and 2^255-1 in both cases, and offset by 19. */
+	f[0] += (reduce_mask_26 + 1) - 19;
+	f[1] += (reduce_mask_25 + 1) - 1;
+	f[2] += (reduce_mask_26 + 1) - 1;
+	f[3] += (reduce_mask_25 + 1) - 1;
+	f[4] += (reduce_mask_26 + 1) - 1;
+	f[5] += (reduce_mask_25 + 1) - 1;
+	f[6] += (reduce_mask_26 + 1) - 1;
+	f[7] += (reduce_mask_25 + 1) - 1;
+	f[8] += (reduce_mask_26 + 1) - 1;
+	f[9] += (reduce_mask_25 + 1) - 1;
+
+	/* now between 2^255 and 2^256-20, and offset by 2^255. */
+	carry_pass_final()
+
+	#undef carry_pass
+	#undef carry_full
+	#undef carry_final
+
+	f[1] <<= 2;
+	f[2] <<= 3;
+	f[3] <<= 5;
+	f[4] <<= 6;
+	f[6] <<= 1;
+	f[7] <<= 3;
+	f[8] <<= 4;
+	f[9] <<= 6;
+
+	#define F(i, s) \
+		out[s+0] |= (unsigned char )(f[i] & 0xff); \
+		out[s+1] = (unsigned char )((f[i] >> 8) & 0xff); \
+		out[s+2] = (unsigned char )((f[i] >> 16) & 0xff); \
+		out[s+3] = (unsigned char )((f[i] >> 24) & 0xff);
+
+	out[0] = 0;
+	out[16] = 0;
+	F(0,0);
+	F(1,3);
+	F(2,6);
+	F(3,9);
+	F(4,12);
+	F(5,16);
+	F(6,19);
+	F(7,22);
+	F(8,25);
+	F(9,28);
+	#undef F
+}
+
+
+/* out = (flag) ? in : out */
+DONNA_INLINE static void
+curve25519_move_conditional_bytes(uint8_t out[96], const uint8_t in[96], uint32_t flag) {
+	const uint32_t nb = flag - 1, b = ~nb;
+	const uint32_t *inl = (const uint32_t *)in;
+	uint32_t *outl = (uint32_t *)out;
+	outl[0] = (outl[0] & nb) | (inl[0] & b);
+	outl[1] = (outl[1] & nb) | (inl[1] & b);
+	outl[2] = (outl[2] & nb) | (inl[2] & b);
+	outl[3] = (outl[3] & nb) | (inl[3] & b);
+	outl[4] = (outl[4] & nb) | (inl[4] & b);
+	outl[5] = (outl[5] & nb) | (inl[5] & b);
+	outl[6] = (outl[6] & nb) | (inl[6] & b);
+	outl[7] = (outl[7] & nb) | (inl[7] & b);
+	outl[8] = (outl[8] & nb) | (inl[8] & b);
+	outl[9] = (outl[9] & nb) | (inl[9] & b);
+	outl[10] = (outl[10] & nb) | (inl[10] & b);
+	outl[11] = (outl[11] & nb) | (inl[11] & b);
+	outl[12] = (outl[12] & nb) | (inl[12] & b);
+	outl[13] = (outl[13] & nb) | (inl[13] & b);
+	outl[14] = (outl[14] & nb) | (inl[14] & b);
+	outl[15] = (outl[15] & nb) | (inl[15] & b);
+	outl[16] = (outl[16] & nb) | (inl[16] & b);
+	outl[17] = (outl[17] & nb) | (inl[17] & b);
+	outl[18] = (outl[18] & nb) | (inl[18] & b);
+	outl[19] = (outl[19] & nb) | (inl[19] & b);
+	outl[20] = (outl[20] & nb) | (inl[20] & b);
+	outl[21] = (outl[21] & nb) | (inl[21] & b);
+	outl[22] = (outl[22] & nb) | (inl[22] & b);
+	outl[23] = (outl[23] & nb) | (inl[23] & b);
+
+}
+
+/* if (iswap) swap(a, b) */
+DONNA_INLINE static void
+curve25519_swap_conditional(bignum25519 a, bignum25519 b, uint32_t iswap) {
+	const uint32_t swap = (uint32_t)(-(int32_t)iswap);
+	uint32_t x0,x1,x2,x3,x4,x5,x6,x7,x8,x9;
+
+	x0 = swap & (a[0] ^ b[0]); a[0] ^= x0; b[0] ^= x0;
+	x1 = swap & (a[1] ^ b[1]); a[1] ^= x1; b[1] ^= x1;
+	x2 = swap & (a[2] ^ b[2]); a[2] ^= x2; b[2] ^= x2;
+	x3 = swap & (a[3] ^ b[3]); a[3] ^= x3; b[3] ^= x3;
+	x4 = swap & (a[4] ^ b[4]); a[4] ^= x4; b[4] ^= x4;
+	x5 = swap & (a[5] ^ b[5]); a[5] ^= x5; b[5] ^= x5;
+	x6 = swap & (a[6] ^ b[6]); a[6] ^= x6; b[6] ^= x6;
+	x7 = swap & (a[7] ^ b[7]); a[7] ^= x7; b[7] ^= x7;
+	x8 = swap & (a[8] ^ b[8]); a[8] ^= x8; b[8] ^= x8;
+	x9 = swap & (a[9] ^ b[9]); a[9] ^= x9; b[9] ^= x9;
+}

src/external/ed25519-donna/curve25519-donna-64bit.h

@@ -0,0 +1,413 @@
+/*
+	Public domain by Adam Langley <agl@imperialviolet.org> &
+	                 Andrew M. <liquidsun@gmail.com>
+	See: https://github.com/floodyberry/curve25519-donna
+
+	64bit integer curve25519 implementation
+*/
+
+typedef uint64_t bignum25519[5];
+
+static const uint64_t reduce_mask_40 = ((uint64_t)1 << 40) - 1;
+static const uint64_t reduce_mask_51 = ((uint64_t)1 << 51) - 1;
+static const uint64_t reduce_mask_56 = ((uint64_t)1 << 56) - 1;
+
+/* out = in */
+DONNA_INLINE static void
+curve25519_copy(bignum25519 out, const bignum25519 in) {
+	out[0] = in[0];
+	out[1] = in[1];
+	out[2] = in[2];
+	out[3] = in[3];
+	out[4] = in[4];
+}
+
+/* out = a + b */
+DONNA_INLINE static void
+curve25519_add(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + b[0];
+	out[1] = a[1] + b[1];
+	out[2] = a[2] + b[2];
+	out[3] = a[3] + b[3];
+	out[4] = a[4] + b[4];
+}
+
+/* out = a + b, where a and/or b are the result of a basic op (add,sub) */
+DONNA_INLINE static void
+curve25519_add_after_basic(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + b[0];
+	out[1] = a[1] + b[1];
+	out[2] = a[2] + b[2];
+	out[3] = a[3] + b[3];
+	out[4] = a[4] + b[4];
+}
+
+DONNA_INLINE static void
+curve25519_add_reduce(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint64_t c;
+	out[0] = a[0] + b[0]    ; c = (out[0] >> 51); out[0] &= reduce_mask_51;
+	out[1] = a[1] + b[1] + c; c = (out[1] >> 51); out[1] &= reduce_mask_51;
+	out[2] = a[2] + b[2] + c; c = (out[2] >> 51); out[2] &= reduce_mask_51;
+	out[3] = a[3] + b[3] + c; c = (out[3] >> 51); out[3] &= reduce_mask_51;
+	out[4] = a[4] + b[4] + c; c = (out[4] >> 51); out[4] &= reduce_mask_51;
+	out[0] += c * 19;
+}
+
+/* multiples of p */
+static const uint64_t twoP0      = 0x0fffffffffffda;
+static const uint64_t twoP1234   = 0x0ffffffffffffe;
+static const uint64_t fourP0     = 0x1fffffffffffb4;
+static const uint64_t fourP1234  = 0x1ffffffffffffc;
+
+/* out = a - b */
+DONNA_INLINE static void
+curve25519_sub(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + twoP0    - b[0];
+	out[1] = a[1] + twoP1234 - b[1];
+	out[2] = a[2] + twoP1234 - b[2];
+	out[3] = a[3] + twoP1234 - b[3];
+	out[4] = a[4] + twoP1234 - b[4];
+}
+
+/* out = a - b, where a and/or b are the result of a basic op (add,sub) */
+DONNA_INLINE static void
+curve25519_sub_after_basic(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	out[0] = a[0] + fourP0    - b[0];
+	out[1] = a[1] + fourP1234 - b[1];
+	out[2] = a[2] + fourP1234 - b[2];
+	out[3] = a[3] + fourP1234 - b[3];
+	out[4] = a[4] + fourP1234 - b[4];
+}
+
+DONNA_INLINE static void
+curve25519_sub_reduce(bignum25519 out, const bignum25519 a, const bignum25519 b) {
+	uint64_t c;
+	out[0] = a[0] + fourP0    - b[0]    ; c = (out[0] >> 51); out[0] &= reduce_mask_51;
+	out[1] = a[1] + fourP1234 - b[1] + c; c = (out[1] >> 51); out[1] &= reduce_mask_51;
+	out[2] = a[2] + fourP1234 - b[2] + c; c = (out[2] >> 51); out[2] &= reduce_mask_51;
+	out[3] = a[3] + fourP1234 - b[3] + c; c = (out[3] >> 51); out[3] &= reduce_mask_51;
+	out[4] = a[4] + fourP1234 - b[4] + c; c = (out[4] >> 51); out[4] &= reduce_mask_51;
+	out[0] += c * 19;
+}
+
+/* out = -a */
+DONNA_INLINE static void
+curve25519_neg(bignum25519 out, const bignum25519 a) {
+	uint64_t c;
+	out[0] = twoP0    - a[0]    ; c = (out[0] >> 51); out[0] &= reduce_mask_51;
+	out[1] = twoP1234 - a[1] + c; c = (out[1] >> 51); out[1] &= reduce_mask_51;
+	out[2] = twoP1234 - a[2] + c; c = (out[2] >> 51); out[2] &= reduce_mask_51;
+	out[3] = twoP1234 - a[3] + c; c = (out[3] >> 51); out[3] &= reduce_mask_51;
+	out[4] = twoP1234 - a[4] + c; c = (out[4] >> 51); out[4] &= reduce_mask_51;
+	out[0] += c * 19;
+}
+
+/* out = a * b */
+DONNA_INLINE static void
+curve25519_mul(bignum25519 out, const bignum25519 in2, const bignum25519 in) {
+#if !defined(HAVE_NATIVE_UINT128)
+	uint128_t mul;
+#endif
+	uint128_t t[5];
+	uint64_t r0,r1,r2,r3,r4,s0,s1,s2,s3,s4,c;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+
+	s0 = in2[0];
+	s1 = in2[1];
+	s2 = in2[2];
+	s3 = in2[3];
+	s4 = in2[4];
+
+#if defined(HAVE_NATIVE_UINT128)
+	t[0]  =  ((uint128_t) r0) * s0;
+	t[1]  =  ((uint128_t) r0) * s1 + ((uint128_t) r1) * s0;
+	t[2]  =  ((uint128_t) r0) * s2 + ((uint128_t) r2) * s0 + ((uint128_t) r1) * s1;
+	t[3]  =  ((uint128_t) r0) * s3 + ((uint128_t) r3) * s0 + ((uint128_t) r1) * s2 + ((uint128_t) r2) * s1;
+	t[4]  =  ((uint128_t) r0) * s4 + ((uint128_t) r4) * s0 + ((uint128_t) r3) * s1 + ((uint128_t) r1) * s3 + ((uint128_t) r2) * s2;
+#else
+	mul64x64_128(t[0], r0, s0)
+	mul64x64_128(t[1], r0, s1) mul64x64_128(mul, r1, s0) add128(t[1], mul)
+	mul64x64_128(t[2], r0, s2) mul64x64_128(mul, r2, s0) add128(t[2], mul) mul64x64_128(mul, r1, s1) add128(t[2], mul)
+	mul64x64_128(t[3], r0, s3) mul64x64_128(mul, r3, s0) add128(t[3], mul) mul64x64_128(mul, r1, s2) add128(t[3], mul) mul64x64_128(mul, r2, s1) add128(t[3], mul)
+	mul64x64_128(t[4], r0, s4) mul64x64_128(mul, r4, s0) add128(t[4], mul) mul64x64_128(mul, r3, s1) add128(t[4], mul) mul64x64_128(mul, r1, s3) add128(t[4], mul) mul64x64_128(mul, r2, s2) add128(t[4], mul)
+#endif
+
+	r1 *= 19;
+	r2 *= 19;
+	r3 *= 19;
+	r4 *= 19;
+
+#if defined(HAVE_NATIVE_UINT128)
+	t[0] += ((uint128_t) r4) * s1 + ((uint128_t) r1) * s4 + ((uint128_t) r2) * s3 + ((uint128_t) r3) * s2;
+	t[1] += ((uint128_t) r4) * s2 + ((uint128_t) r2) * s4 + ((uint128_t) r3) * s3;
+	t[2] += ((uint128_t) r4) * s3 + ((uint128_t) r3) * s4;
+	t[3] += ((uint128_t) r4) * s4;
+#else
+	mul64x64_128(mul, r4, s1) add128(t[0], mul) mul64x64_128(mul, r1, s4) add128(t[0], mul) mul64x64_128(mul, r2, s3) add128(t[0], mul) mul64x64_128(mul, r3, s2) add128(t[0], mul)
+	mul64x64_128(mul, r4, s2) add128(t[1], mul) mul64x64_128(mul, r2, s4) add128(t[1], mul) mul64x64_128(mul, r3, s3) add128(t[1], mul)
+	mul64x64_128(mul, r4, s3) add128(t[2], mul) mul64x64_128(mul, r3, s4) add128(t[2], mul)
+	mul64x64_128(mul, r4, s4) add128(t[3], mul)
+#endif
+
+
+	                     r0 = lo128(t[0]) & reduce_mask_51; shr128(c, t[0], 51);
+	add128_64(t[1], c)   r1 = lo128(t[1]) & reduce_mask_51; shr128(c, t[1], 51);
+	add128_64(t[2], c)   r2 = lo128(t[2]) & reduce_mask_51; shr128(c, t[2], 51);
+	add128_64(t[3], c)   r3 = lo128(t[3]) & reduce_mask_51; shr128(c, t[3], 51);
+	add128_64(t[4], c)   r4 = lo128(t[4]) & reduce_mask_51; shr128(c, t[4], 51);
+	r0 +=   c * 19; c = r0 >> 51; r0 = r0 & reduce_mask_51;
+	r1 +=   c;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+}
+
+DONNA_NOINLINE static void
+curve25519_mul_noinline(bignum25519 out, const bignum25519 in2, const bignum25519 in) {
+	curve25519_mul(out, in2, in);
+}
+
+/* out = in^(2 * count) */
+DONNA_NOINLINE static void
+curve25519_square_times(bignum25519 out, const bignum25519 in, uint64_t count) {
+#if !defined(HAVE_NATIVE_UINT128)
+	uint128_t mul;
+#endif
+	uint128_t t[5];
+	uint64_t r0,r1,r2,r3,r4,c;
+	uint64_t d0,d1,d2,d4,d419;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+
+	do {
+		d0 = r0 * 2;
+		d1 = r1 * 2;
+		d2 = r2 * 2 * 19;
+		d419 = r4 * 19;
+		d4 = d419 * 2;
+
+#if defined(HAVE_NATIVE_UINT128)
+		t[0] = ((uint128_t) r0) * r0 + ((uint128_t) d4) * r1 + (((uint128_t) d2) * (r3     ));
+		t[1] = ((uint128_t) d0) * r1 + ((uint128_t) d4) * r2 + (((uint128_t) r3) * (r3 * 19));
+		t[2] = ((uint128_t) d0) * r2 + ((uint128_t) r1) * r1 + (((uint128_t) d4) * (r3     ));
+		t[3] = ((uint128_t) d0) * r3 + ((uint128_t) d1) * r2 + (((uint128_t) r4) * (d419   ));
+		t[4] = ((uint128_t) d0) * r4 + ((uint128_t) d1) * r3 + (((uint128_t) r2) * (r2     ));
+#else
+		mul64x64_128(t[0], r0, r0) mul64x64_128(mul, d4, r1) add128(t[0], mul) mul64x64_128(mul, d2,      r3) add128(t[0], mul)
+		mul64x64_128(t[1], d0, r1) mul64x64_128(mul, d4, r2) add128(t[1], mul) mul64x64_128(mul, r3, r3 * 19) add128(t[1], mul)
+		mul64x64_128(t[2], d0, r2) mul64x64_128(mul, r1, r1) add128(t[2], mul) mul64x64_128(mul, d4,      r3) add128(t[2], mul)
+		mul64x64_128(t[3], d0, r3) mul64x64_128(mul, d1, r2) add128(t[3], mul) mul64x64_128(mul, r4,    d419) add128(t[3], mul)
+		mul64x64_128(t[4], d0, r4) mul64x64_128(mul, d1, r3) add128(t[4], mul) mul64x64_128(mul, r2,      r2) add128(t[4], mul)
+#endif
+
+		r0 = lo128(t[0]) & reduce_mask_51;
+		r1 = lo128(t[1]) & reduce_mask_51; shl128(c, t[0], 13); r1 += c;
+		r2 = lo128(t[2]) & reduce_mask_51; shl128(c, t[1], 13); r2 += c;
+		r3 = lo128(t[3]) & reduce_mask_51; shl128(c, t[2], 13); r3 += c;
+		r4 = lo128(t[4]) & reduce_mask_51; shl128(c, t[3], 13); r4 += c; 
+		                                   shl128(c, t[4], 13); r0 += c * 19;
+		               c = r0 >> 51; r0 &= reduce_mask_51;
+		r1 += c     ;  c = r1 >> 51; r1 &= reduce_mask_51;
+		r2 += c     ;  c = r2 >> 51; r2 &= reduce_mask_51;
+		r3 += c     ;  c = r3 >> 51; r3 &= reduce_mask_51;
+		r4 += c     ;  c = r4 >> 51; r4 &= reduce_mask_51;
+		r0 += c * 19;
+	} while(--count);
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+}
+
+DONNA_INLINE static void
+curve25519_square(bignum25519 out, const bignum25519 in) {
+#if !defined(HAVE_NATIVE_UINT128)
+	uint128_t mul;
+#endif
+	uint128_t t[5];
+	uint64_t r0,r1,r2,r3,r4,c;
+	uint64_t d0,d1,d2,d4,d419;
+
+	r0 = in[0];
+	r1 = in[1];
+	r2 = in[2];
+	r3 = in[3];
+	r4 = in[4];
+
+	d0 = r0 * 2;
+	d1 = r1 * 2;
+	d2 = r2 * 2 * 19;
+	d419 = r4 * 19;
+	d4 = d419 * 2;
+
+#if defined(HAVE_NATIVE_UINT128)
+	t[0] = ((uint128_t) r0) * r0 + ((uint128_t) d4) * r1 + (((uint128_t) d2) * (r3     ));
+	t[1] = ((uint128_t) d0) * r1 + ((uint128_t) d4) * r2 + (((uint128_t) r3) * (r3 * 19));
+	t[2] = ((uint128_t) d0) * r2 + ((uint128_t) r1) * r1 + (((uint128_t) d4) * (r3     ));
+	t[3] = ((uint128_t) d0) * r3 + ((uint128_t) d1) * r2 + (((uint128_t) r4) * (d419   ));
+	t[4] = ((uint128_t) d0) * r4 + ((uint128_t) d1) * r3 + (((uint128_t) r2) * (r2     ));
+#else
+	mul64x64_128(t[0], r0, r0) mul64x64_128(mul, d4, r1) add128(t[0], mul) mul64x64_128(mul, d2,      r3) add128(t[0], mul)
+	mul64x64_128(t[1], d0, r1) mul64x64_128(mul, d4, r2) add128(t[1], mul) mul64x64_128(mul, r3, r3 * 19) add128(t[1], mul)
+	mul64x64_128(t[2], d0, r2) mul64x64_128(mul, r1, r1) add128(t[2], mul) mul64x64_128(mul, d4,      r3) add128(t[2], mul)
+	mul64x64_128(t[3], d0, r3) mul64x64_128(mul, d1, r2) add128(t[3], mul) mul64x64_128(mul, r4,    d419) add128(t[3], mul)
+	mul64x64_128(t[4], d0, r4) mul64x64_128(mul, d1, r3) add128(t[4], mul) mul64x64_128(mul, r2,      r2) add128(t[4], mul)
+#endif
+
+	                     r0 = lo128(t[0]) & reduce_mask_51; shr128(c, t[0], 51);
+	add128_64(t[1], c)   r1 = lo128(t[1]) & reduce_mask_51; shr128(c, t[1], 51);
+	add128_64(t[2], c)   r2 = lo128(t[2]) & reduce_mask_51; shr128(c, t[2], 51);
+	add128_64(t[3], c)   r3 = lo128(t[3]) & reduce_mask_51; shr128(c, t[3], 51);
+	add128_64(t[4], c)   r4 = lo128(t[4]) & reduce_mask_51; shr128(c, t[4], 51);
+	r0 +=   c * 19; c = r0 >> 51; r0 = r0 & reduce_mask_51;
+	r1 +=   c;
+
+	out[0] = r0;
+	out[1] = r1;
+	out[2] = r2;
+	out[3] = r3;
+	out[4] = r4;
+}
+
+/* Take a little-endian, 32-byte number and expand it into polynomial form */
+DONNA_INLINE static void
+curve25519_expand(bignum25519 out, const unsigned char *in) {
+	static const union { uint8_t b[2]; uint16_t s; } endian_check = {{1,0}};
+	uint64_t x0,x1,x2,x3;
+
+	if (endian_check.s == 1) {
+		x0 = *(uint64_t *)(in + 0);
+		x1 = *(uint64_t *)(in + 8);
+		x2 = *(uint64_t *)(in + 16);
+		x3 = *(uint64_t *)(in + 24);
+	} else {
+		#define F(s)                         \
+			((((uint64_t)in[s + 0])      ) | \
+			 (((uint64_t)in[s + 1]) <<  8) | \
+			 (((uint64_t)in[s + 2]) << 16) | \
+			 (((uint64_t)in[s + 3]) << 24) | \
+			 (((uint64_t)in[s + 4]) << 32) | \
+			 (((uint64_t)in[s + 5]) << 40) | \
+			 (((uint64_t)in[s + 6]) << 48) | \
+			 (((uint64_t)in[s + 7]) << 56))
+
+		x0 = F(0);
+		x1 = F(8);
+		x2 = F(16);
+		x3 = F(24);
+	}
+
+	out[0] = x0 & reduce_mask_51; x0 = (x0 >> 51) | (x1 << 13);
+	out[1] = x0 & reduce_mask_51; x1 = (x1 >> 38) | (x2 << 26);
+	out[2] = x1 & reduce_mask_51; x2 = (x2 >> 25) | (x3 << 39);
+	out[3] = x2 & reduce_mask_51; x3 = (x3 >> 12);
+	out[4] = x3 & reduce_mask_51;
+}
+
+/* Take a fully reduced polynomial form number and contract it into a
+ * little-endian, 32-byte array
+ */
+DONNA_INLINE static void
+curve25519_contract(unsigned char *out, const bignum25519 input) {
+	uint64_t t[5];
+	uint64_t f, i;
+
+	t[0] = input[0];
+	t[1] = input[1];
+	t[2] = input[2];
+	t[3] = input[3];
+	t[4] = input[4];
+
+	#define curve25519_contract_carry() \
+		t[1] += t[0] >> 51; t[0] &= reduce_mask_51; \
+		t[2] += t[1] >> 51; t[1] &= reduce_mask_51; \
+		t[3] += t[2] >> 51; t[2] &= reduce_mask_51; \
+		t[4] += t[3] >> 51; t[3] &= reduce_mask_51;
+
+	#define curve25519_contract_carry_full() curve25519_contract_carry() \
+		t[0] += 19 * (t[4] >> 51); t[4] &= reduce_mask_51;
+
+	#define curve25519_contract_carry_final() curve25519_contract_carry() \
+		t[4] &= reduce_mask_51;
+
+	curve25519_contract_carry_full()
+	curve25519_contract_carry_full()
+
+	/* now t is between 0 and 2^255-1, properly carried. */
+	/* case 1: between 0 and 2^255-20. case 2: between 2^255-19 and 2^255-1. */
+	t[0] += 19;
+	curve25519_contract_carry_full()
+
+	/* now between 19 and 2^255-1 in both cases, and offset by 19. */
+	t[0] += (reduce_mask_51 + 1) - 19;
+	t[1] += (reduce_mask_51 + 1) - 1;
+	t[2] += (reduce_mask_51 + 1) - 1;
+	t[3] += (reduce_mask_51 + 1) - 1;
+	t[4] += (reduce_mask_51 + 1) - 1;
+
+	/* now between 2^255 and 2^256-20, and offset by 2^255. */
+	curve25519_contract_carry_final()
+
+	#define write51full(n,shift) \
+		f = ((t[n] >> shift) | (t[n+1] << (51 - shift))); \
+		for (i = 0; i < 8; i++, f >>= 8) *out++ = (unsigned char)f;
+	#define write51(n) write51full(n,13*n)
+	write51(0)
+	write51(1)
+	write51(2)
+	write51(3)
+}
+
+#if !defined(ED25519_GCC_64BIT_CHOOSE)
+
+/* out = (flag) ? in : out */
+DONNA_INLINE static void
+curve25519_move_conditional_bytes(uint8_t out[96], const uint8_t in[96], uint64_t flag) {
+	const uint64_t nb = flag - 1, b = ~nb;
+	const uint64_t *inq = (const uint64_t *)in;
+	uint64_t *outq = (uint64_t *)out;
+	outq[0] = (outq[0] & nb) | (inq[0] & b);
+	outq[1] = (outq[1] & nb) | (inq[1] & b);
+	outq[2] = (outq[2] & nb) | (inq[2] & b);
+	outq[3] = (outq[3] & nb) | (inq[3] & b);
+	outq[4] = (outq[4] & nb) | (inq[4] & b);
+	outq[5] = (outq[5] & nb) | (inq[5] & b);
+	outq[6] = (outq[6] & nb) | (inq[6] & b);
+	outq[7] = (outq[7] & nb) | (inq[7] & b);
+	outq[8] = (outq[8] & nb) | (inq[8] & b);
+	outq[9] = (outq[9] & nb) | (inq[9] & b);
+	outq[10] = (outq[10] & nb) | (inq[10] & b);
+	outq[11] = (outq[11] & nb) | (inq[11] & b);
+}
+
+/* if (iswap) swap(a, b) */
+DONNA_INLINE static void
+curve25519_swap_conditional(bignum25519 a, bignum25519 b, uint64_t iswap) {
+	const uint64_t swap = (uint64_t)(-(int64_t)iswap);
+	uint64_t x0,x1,x2,x3,x4;
+
+	x0 = swap & (a[0] ^ b[0]); a[0] ^= x0; b[0] ^= x0;
+	x1 = swap & (a[1] ^ b[1]); a[1] ^= x1; b[1] ^= x1;
+	x2 = swap & (a[2] ^ b[2]); a[2] ^= x2; b[2] ^= x2;
+	x3 = swap & (a[3] ^ b[3]); a[3] ^= x3; b[3] ^= x3;
+	x4 = swap & (a[4] ^ b[4]); a[4] ^= x4; b[4] ^= x4;
+}
+
+#endif /* ED25519_GCC_64BIT_CHOOSE */
+
+#define ED25519_64BIT_TABLES
+

src/external/ed25519-donna/curve25519-donna-helpers.h

@@ -0,0 +1,67 @@
+/*
+	Public domain by Andrew M. <liquidsun@gmail.com>
+	See: https://github.com/floodyberry/curve25519-donna
+
+	Curve25519 implementation agnostic helpers
+*/
+
+/*
+ * In:  b =   2^5 - 2^0
+ * Out: b = 2^250 - 2^0
+ */
+static void
+curve25519_pow_two5mtwo0_two250mtwo0(bignum25519 b) {
+	bignum25519 ALIGN(16) t0,c;
+
+	/* 2^5  - 2^0 */ /* b */
+	/* 2^10 - 2^5 */ curve25519_square_times(t0, b, 5);
+	/* 2^10 - 2^0 */ curve25519_mul_noinline(b, t0, b);
+	/* 2^20 - 2^10 */ curve25519_square_times(t0, b, 10);
+	/* 2^20 - 2^0 */ curve25519_mul_noinline(c, t0, b);
+	/* 2^40 - 2^20 */ curve25519_square_times(t0, c, 20);
+	/* 2^40 - 2^0 */ curve25519_mul_noinline(t0, t0, c);
+	/* 2^50 - 2^10 */ curve25519_square_times(t0, t0, 10);
+	/* 2^50 - 2^0 */ curve25519_mul_noinline(b, t0, b);
+	/* 2^100 - 2^50 */ curve25519_square_times(t0, b, 50);
+	/* 2^100 - 2^0 */ curve25519_mul_noinline(c, t0, b);
+	/* 2^200 - 2^100 */ curve25519_square_times(t0, c, 100);
+	/* 2^200 - 2^0 */ curve25519_mul_noinline(t0, t0, c);
+	/* 2^250 - 2^50 */ curve25519_square_times(t0, t0, 50);
+	/* 2^250 - 2^0 */ curve25519_mul_noinline(b, t0, b);
+}
+
+/*
+ * z^(p - 2) = z(2^255 - 21)
+ */
+static void
+curve25519_recip(bignum25519 out, const bignum25519 z) {
+	bignum25519 ALIGN(16) a,t0,b;
+
+	/* 2 */ curve25519_square_times(a, z, 1); /* a = 2 */
+	/* 8 */ curve25519_square_times(t0, a, 2);
+	/* 9 */ curve25519_mul_noinline(b, t0, z); /* b = 9 */
+	/* 11 */ curve25519_mul_noinline(a, b, a); /* a = 11 */
+	/* 22 */ curve25519_square_times(t0, a, 1);
+	/* 2^5 - 2^0 = 31 */ curve25519_mul_noinline(b, t0, b);
+	/* 2^250 - 2^0 */ curve25519_pow_two5mtwo0_two250mtwo0(b);
+	/* 2^255 - 2^5 */ curve25519_square_times(b, b, 5);
+	/* 2^255 - 21 */ curve25519_mul_noinline(out, b, a);
+}
+
+/*
+ * z^((p-5)/8) = z^(2^252 - 3)
+ */
+static void
+curve25519_pow_two252m3(bignum25519 two252m3, const bignum25519 z) {
+	bignum25519 ALIGN(16) b,c,t0;
+
+	/* 2 */ curve25519_square_times(c, z, 1); /* c = 2 */
+	/* 8 */ curve25519_square_times(t0, c, 2); /* t0 = 8 */
+	/* 9 */ curve25519_mul_noinline(b, t0, z); /* b = 9 */
+	/* 11 */ curve25519_mul_noinline(c, b, c); /* c = 11 */
+	/* 22 */ curve25519_square_times(t0, c, 1);
+	/* 2^5 - 2^0 = 31 */ curve25519_mul_noinline(b, t0, b);
+	/* 2^250 - 2^0 */ curve25519_pow_two5mtwo0_two250mtwo0(b);
+	/* 2^252 - 2^2 */ curve25519_square_times(b, b, 2);
+	/* 2^252 - 3 */ curve25519_mul_noinline(two252m3, b, z);
+}

src/external/ed25519-donna/ed25519-donna-32bit-sse2.h

@@ -0,0 +1,513 @@
+#if defined(ED25519_GCC_32BIT_SSE_CHOOSE)
+
+#define HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS
+
+DONNA_NOINLINE static void
+ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
+	int32_t breg = (int32_t)b;
+	uint32_t sign = (uint32_t)breg >> 31;
+	uint32_t mask = ~(sign - 1);
+	uint32_t u = (breg + mask) ^ mask;
+
+	__asm__ __volatile__ (
+		/* ysubx+xaddy */
+		"movl %0, %%eax                  ;\n"
+		"movd %%eax, %%xmm6              ;\n"
+		"pshufd $0x00, %%xmm6, %%xmm6    ;\n"
+		"pxor %%xmm0, %%xmm0             ;\n"
+		"pxor %%xmm1, %%xmm1             ;\n"
+		"pxor %%xmm2, %%xmm2             ;\n"
+		"pxor %%xmm3, %%xmm3             ;\n"
+
+		/* 0 */
+		"movl $0, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movl $1, %%ecx                  ;\n"
+		"movd %%ecx, %%xmm4              ;\n"
+		"pxor %%xmm5, %%xmm5             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 1 */
+		"movl $1, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 0(%1), %%xmm4            ;\n"
+		"movdqa 16(%1), %%xmm5           ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 32(%1), %%xmm4           ;\n"
+		"movdqa 48(%1), %%xmm5           ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 2 */
+		"movl $2, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 96(%1), %%xmm4           ;\n"
+		"movdqa 112(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 128(%1), %%xmm4          ;\n"
+		"movdqa 144(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 3 */
+		"movl $3, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 192(%1), %%xmm4          ;\n"
+		"movdqa 208(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 224(%1), %%xmm4          ;\n"
+		"movdqa 240(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 4 */
+		"movl $4, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 288(%1), %%xmm4          ;\n"
+		"movdqa 304(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 320(%1), %%xmm4          ;\n"
+		"movdqa 336(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 5 */
+		"movl $5, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 384(%1), %%xmm4          ;\n"
+		"movdqa 400(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 416(%1), %%xmm4          ;\n"
+		"movdqa 432(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 6 */
+		"movl $6, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 480(%1), %%xmm4          ;\n"
+		"movdqa 496(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 512(%1), %%xmm4          ;\n"
+		"movdqa 528(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 7 */
+		"movl $7, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 576(%1), %%xmm4          ;\n"
+		"movdqa 592(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 608(%1), %%xmm4          ;\n"
+		"movdqa 624(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* 8 */
+		"movl $8, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 672(%1), %%xmm4          ;\n"
+		"movdqa 688(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm0              ;\n"
+		"por %%xmm5, %%xmm1              ;\n"
+		"movdqa 704(%1), %%xmm4          ;\n"
+		"movdqa 720(%1), %%xmm5          ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"por %%xmm4, %%xmm2              ;\n"
+		"por %%xmm5, %%xmm3              ;\n"
+
+		/* conditional swap based on sign */
+		"movl %3, %%ecx                  ;\n"
+		"movl %2, %%eax                  ;\n"
+		"xorl $1, %%ecx                  ;\n"
+		"movd %%ecx, %%xmm6              ;\n"
+		"pxor %%xmm7, %%xmm7             ;\n"
+		"pshufd $0x00, %%xmm6, %%xmm6    ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa %%xmm2, %%xmm4           ;\n"
+		"movdqa %%xmm3, %%xmm5           ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"pand %%xmm7, %%xmm5             ;\n"
+		"pxor %%xmm4, %%xmm0             ;\n"
+		"pxor %%xmm5, %%xmm1             ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+
+		/* store ysubx */
+		"movd %%xmm0, %%ecx              ;\n"
+		"movl %%ecx, %%edx               ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 0(%%eax)            ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"shrdl $26, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 4(%%eax)            ;\n"
+		"movd %%xmm0, %%edx              ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"shrdl $19, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 8(%%eax)            ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"shrdl $13, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 12(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrl $6, %%ecx                  ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 16(%%eax)           ;\n"
+		"movl %%edx, %%ecx               ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 20(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrdl $25, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 24(%%eax)           ;\n"
+		"movd %%xmm1, %%ecx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrdl $19, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 28(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"shrdl $12, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 32(%%eax)           ;\n"
+		"shrl $6, %%edx                  ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"xorl %%ecx, %%ecx               ;\n"
+		"movl %%edx, 36(%%eax)           ;\n"
+		"movl %%ecx, 40(%%eax)           ;\n"
+		"movl %%ecx, 44(%%eax)           ;\n"
+
+		/* store xaddy */
+		"addl $48, %%eax                 ;\n"
+		"movdqa %%xmm2, %%xmm0           ;\n"
+		"movdqa %%xmm3, %%xmm1           ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"movl %%ecx, %%edx               ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 0(%%eax)            ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"shrdl $26, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 4(%%eax)            ;\n"
+		"movd %%xmm0, %%edx              ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"shrdl $19, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 8(%%eax)            ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"shrdl $13, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 12(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrl $6, %%ecx                  ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 16(%%eax)           ;\n"
+		"movl %%edx, %%ecx               ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 20(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrdl $25, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 24(%%eax)           ;\n"
+		"movd %%xmm1, %%ecx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrdl $19, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 28(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"shrdl $12, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 32(%%eax)           ;\n"
+		"shrl $6, %%edx                  ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"xorl %%ecx, %%ecx               ;\n"
+		"movl %%edx, 36(%%eax)           ;\n"
+		"movl %%ecx, 40(%%eax)           ;\n"
+		"movl %%ecx, 44(%%eax)           ;\n"
+
+		/* t2d */
+		"movl %0, %%eax                  ;\n"
+		"movd %%eax, %%xmm6              ;\n"
+		"pshufd $0x00, %%xmm6, %%xmm6    ;\n"
+		"pxor %%xmm0, %%xmm0             ;\n"
+		"pxor %%xmm1, %%xmm1             ;\n"
+
+		/* 0 */
+		"movl $0, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"pxor %%xmm0, %%xmm0             ;\n"
+		"pxor %%xmm1, %%xmm1             ;\n"
+
+		/* 1 */
+		"movl $1, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 64(%1), %%xmm3           ;\n"
+		"movdqa 80(%1), %%xmm4           ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 2 */
+		"movl $2, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 160(%1), %%xmm3          ;\n"
+		"movdqa 176(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 3 */
+		"movl $3, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 256(%1), %%xmm3          ;\n"
+		"movdqa 272(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 4 */
+		"movl $4, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 352(%1), %%xmm3          ;\n"
+		"movdqa 368(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 5 */
+		"movl $5, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 448(%1), %%xmm3          ;\n"
+		"movdqa 464(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 6 */
+		"movl $6, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 544(%1), %%xmm3          ;\n"
+		"movdqa 560(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 7 */
+		"movl $7, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 640(%1), %%xmm3          ;\n"
+		"movdqa 656(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* 8 */
+		"movl $8, %%eax                  ;\n"
+		"movd %%eax, %%xmm7              ;\n"
+		"pshufd $0x00, %%xmm7, %%xmm7    ;\n"
+		"pcmpeqd %%xmm6, %%xmm7          ;\n"
+		"movdqa 736(%1), %%xmm3          ;\n"
+		"movdqa 752(%1), %%xmm4          ;\n"
+		"pand %%xmm7, %%xmm3             ;\n"
+		"pand %%xmm7, %%xmm4             ;\n"
+		"por %%xmm3, %%xmm0              ;\n"
+		"por %%xmm4, %%xmm1              ;\n"
+
+		/* store t2d */
+		"movl %2, %%eax                  ;\n"
+		"addl $96, %%eax                 ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"movl %%ecx, %%edx               ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 0(%%eax)            ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"shrdl $26, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 4(%%eax)            ;\n"
+		"movd %%xmm0, %%edx              ;\n"
+		"pshufd $0x39, %%xmm0, %%xmm0    ;\n"
+		"shrdl $19, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 8(%%eax)            ;\n"
+		"movd %%xmm0, %%ecx              ;\n"
+		"shrdl $13, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 12(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrl $6, %%ecx                  ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 16(%%eax)           ;\n"
+		"movl %%edx, %%ecx               ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 20(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrdl $25, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 24(%%eax)           ;\n"
+		"movd %%xmm1, %%ecx              ;\n"
+		"pshufd $0x39, %%xmm1, %%xmm1    ;\n"
+		"shrdl $19, %%ecx, %%edx         ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"movl %%edx, 28(%%eax)           ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"movd %%xmm1, %%edx              ;\n"
+		"shrdl $12, %%edx, %%ecx         ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"movl %%ecx, 32(%%eax)           ;\n"
+		"shrl $6, %%edx                  ;\n"
+		"andl $0x1ffffff, %%edx          ;\n"
+		"xorl %%ecx, %%ecx               ;\n"
+		"movl %%edx, 36(%%eax)           ;\n"
+		"movl %%ecx, 40(%%eax)           ;\n"
+		"movl %%ecx, 44(%%eax)           ;\n"
+		"movdqa 0(%%eax), %%xmm0         ;\n"
+		"movdqa 16(%%eax), %%xmm1        ;\n"
+		"movdqa 32(%%eax), %%xmm2        ;\n"
+
+		/* conditionally negate t2d */
+
+		/* set up 2p in to 3/4 */
+		"movl $0x7ffffda, %%ecx          ;\n"
+		"movl $0x3fffffe, %%edx          ;\n"
+		"movd %%ecx, %%xmm3              ;\n"
+		"movd %%edx, %%xmm5              ;\n"
+		"movl $0x7fffffe, %%ecx          ;\n"
+		"movd %%ecx, %%xmm4              ;\n"
+		"punpckldq %%xmm5, %%xmm3        ;\n"
+		"punpckldq %%xmm5, %%xmm4        ;\n"
+		"punpcklqdq %%xmm4, %%xmm3       ;\n"
+		"movdqa %%xmm4, %%xmm5           ;\n"
+		"punpcklqdq %%xmm4, %%xmm4       ;\n"
+
+		/* subtract and conditionally move */
+		"movl %3, %%ecx                  ;\n"
+		"sub $1, %%ecx                   ;\n"
+		"movd %%ecx, %%xmm6              ;\n"
+		"pshufd $0x00, %%xmm6, %%xmm6    ;\n"
+		"movdqa %%xmm6, %%xmm7           ;\n"
+		"psubd %%xmm0, %%xmm3            ;\n"
+		"psubd %%xmm1, %%xmm4            ;\n"
+		"psubd %%xmm2, %%xmm5            ;\n"
+		"pand %%xmm6, %%xmm0             ;\n"
+		"pand %%xmm6, %%xmm1             ;\n"
+		"pand %%xmm6, %%xmm2             ;\n"
+		"pandn %%xmm3, %%xmm6            ;\n"
+		"movdqa %%xmm7, %%xmm3           ;\n"
+		"pandn %%xmm4, %%xmm7            ;\n"
+		"pandn %%xmm5, %%xmm3            ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm3, %%xmm2              ;\n"
+
+		/* store */
+		"movdqa %%xmm0, 0(%%eax)         ;\n"
+		"movdqa %%xmm1, 16(%%eax)        ;\n"
+		"movdqa %%xmm2, 32(%%eax)        ;\n"
+		:
+		: "m"(u), "r"(&table[pos * 8]), "m"(t), "m"(sign) /* %0 = u, %1 = table, %2 = t, %3 = sign */
+		: "%eax", "%ecx", "%edx", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
+	);
+}
+
+#endif /* defined(ED25519_GCC_32BIT_SSE_CHOOSE) */
+

src/external/ed25519-donna/ed25519-donna-32bit-tables.h

@@ -0,0 +1,61 @@
+static const ge25519 ALIGN(16) ge25519_basepoint = {
+	{0x0325d51a,0x018b5823,0x00f6592a,0x0104a92d,0x01a4b31d,0x01d6dc5c,0x027118fe,0x007fd814,0x013cd6e5,0x0085a4db},
+	{0x02666658,0x01999999,0x00cccccc,0x01333333,0x01999999,0x00666666,0x03333333,0x00cccccc,0x02666666,0x01999999},
+	{0x00000001,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000},
+	{0x01b7dda3,0x01a2ace9,0x025eadbb,0x0003ba8a,0x0083c27e,0x00abe37d,0x01274732,0x00ccacdd,0x00fd78b7,0x019e1d7c}
+};
+
+/*
+	d
+*/
+
+static const bignum25519 ALIGN(16) ge25519_ecd = {
+	0x035978a3,0x00d37284,0x03156ebd,0x006a0a0e,0x0001c029,0x0179e898,0x03a03cbb,0x01ce7198,0x02e2b6ff,0x01480db3
+};
+
+static const bignum25519 ALIGN(16) ge25519_ec2d = {
+	0x02b2f159,0x01a6e509,0x022add7a,0x00d4141d,0x00038052,0x00f3d130,0x03407977,0x019ce331,0x01c56dff,0x00901b67
+};
+
+/*
+	sqrt(-1)
+*/
+
+static const bignum25519 ALIGN(16) ge25519_sqrtneg1 = {
+	0x020ea0b0,0x0186c9d2,0x008f189d,0x0035697f,0x00bd0c60,0x01fbd7a7,0x02804c9e,0x01e16569,0x0004fc1d,0x00ae0c92
+};
+
+static const ge25519_niels ALIGN(16) ge25519_niels_sliding_multiples[32] = {
+	{{0x0340913e,0x000e4175,0x03d673a2,0x002e8a05,0x03f4e67c,0x008f8a09,0x00c21a34,0x004cf4b8,0x01298f81,0x0113f4be},{0x018c3b85,0x0124f1bd,0x01c325f7,0x0037dc60,0x033e4cb7,0x003d42c2,0x01a44c32,0x014ca4e1,0x03a33d4b,0x001f3e74},{0x037aaa68,0x00448161,0x0093d579,0x011e6556,0x009b67a0,0x0143598c,0x01bee5ee,0x00b50b43,0x0289f0c6,0x01bc45ed}},
+	{{0x00fcd265,0x0047fa29,0x034faacc,0x01ef2e0d,0x00ef4d4f,0x014bd6bd,0x00f98d10,0x014c5026,0x007555bd,0x00aae456},{0x00ee9730,0x016c2a13,0x017155e4,0x01874432,0x00096a10,0x01016732,0x01a8014f,0x011e9823,0x01b9a80f,0x01e85938},{0x01d0d889,0x01a4cfc3,0x034c4295,0x0110e1ae,0x0162508c,0x00f2db4c,0x0072a2c6,0x0098da2e,0x02f12b9b,0x0168a09a}},
+	{{0x0047d6ba,0x0060b0e9,0x0136eff2,0x008a5939,0x03540053,0x0064a087,0x02788e5c,0x00be7c67,0x033eb1b5,0x005529f9},{0x00a5bb33,0x00af1102,0x01a05442,0x001e3af7,0x02354123,0x00bfec44,0x01f5862d,0x00dd7ba3,0x03146e20,0x00a51733},{0x012a8285,0x00f6fc60,0x023f9797,0x003e85ee,0x009c3820,0x01bda72d,0x01b3858d,0x00d35683,0x0296b3bb,0x010eaaf9}},
+	{{0x023221b1,0x01cb26aa,0x0074f74d,0x0099ddd1,0x01b28085,0x00192c3a,0x013b27c9,0x00fc13bd,0x01d2e531,0x0075bb75},{0x004ea3bf,0x00973425,0x001a4d63,0x01d59cee,0x01d1c0d4,0x00542e49,0x01294114,0x004fce36,0x029283c9,0x01186fa9},{0x01b8b3a2,0x00db7200,0x00935e30,0x003829f5,0x02cc0d7d,0x0077adf3,0x0220dd2c,0x0014ea53,0x01c6a0f9,0x01ea7eec}},
+	{{0x039d8064,0x01885f80,0x00337e6d,0x01b7a902,0x02628206,0x015eb044,0x01e30473,0x0191f2d9,0x011fadc9,0x01270169},{0x02a8632f,0x0199e2a9,0x00d8b365,0x017a8de2,0x02994279,0x0086f5b5,0x0119e4e3,0x01eb39d6,0x0338add7,0x00d2e7b4},{0x0045af1b,0x013a2fe4,0x0245e0d6,0x014538ce,0x038bfe0f,0x01d4cf16,0x037e14c9,0x0160d55e,0x0021b008,0x01cf05c8}},
+	{{0x01864348,0x01d6c092,0x0070262b,0x014bb844,0x00fb5acd,0x008deb95,0x003aaab5,0x00eff474,0x00029d5c,0x0062ad66},{0x02802ade,0x01c02122,0x01c4e5f7,0x00781181,0x039767fb,0x01703406,0x0342388b,0x01f5e227,0x022546d8,0x0109d6ab},{0x016089e9,0x00cb317f,0x00949b05,0x01099417,0x000c7ad2,0x011a8622,0x0088ccda,0x01290886,0x022b53df,0x00f71954}},
+	{{0x027fbf93,0x01c04ecc,0x01ed6a0d,0x004cdbbb,0x02bbf3af,0x00ad5968,0x01591955,0x0094f3a2,0x02d17602,0x00099e20},{0x02007f6d,0x003088a8,0x03db77ee,0x00d5ade6,0x02fe12ce,0x0107ba07,0x0107097d,0x00482a6f,0x02ec346f,0x008d3f5f},{0x032ea378,0x0028465c,0x028e2a6c,0x018efc6e,0x0090df9a,0x01a7e533,0x039bfc48,0x010c745d,0x03daa097,0x0125ee9b}},
+	{{0x028ccf0b,0x00f36191,0x021ac081,0x012154c8,0x034e0a6e,0x01b25192,0x00180403,0x01d7eea1,0x00218d05,0x010ed735},{0x03cfeaa0,0x01b300c4,0x008da499,0x0068c4e1,0x0219230a,0x01f2d4d0,0x02defd60,0x00e565b7,0x017f12de,0x018788a4},{0x03d0b516,0x009d8be6,0x03ddcbb3,0x0071b9fe,0x03ace2bd,0x01d64270,0x032d3ec9,0x01084065,0x0210ae4d,0x01447584}},
+	{{0x0020de87,0x00e19211,0x01b68102,0x00b5ac97,0x022873c0,0x01942d25,0x01271394,0x0102073f,0x02fe2482,0x01c69ff9},{0x010e9d81,0x019dbbe5,0x0089f258,0x006e06b8,0x02951883,0x018f1248,0x019b3237,0x00bc7553,0x024ddb85,0x01b4c964},{0x01c8c854,0x0060ae29,0x01406d8e,0x01cff2f9,0x00cff451,0x01778d0c,0x03ac8c41,0x01552e59,0x036559ee,0x011d1b12}},
+	{{0x00741147,0x0151b219,0x01092690,0x00e877e6,0x01f4d6bb,0x0072a332,0x01cd3b03,0x00dadff2,0x0097db5e,0x0086598d},{0x01c69a2b,0x01decf1b,0x02c2fa6e,0x013b7c4f,0x037beac8,0x013a16b5,0x028e7bda,0x01f6e8ac,0x01e34fe9,0x01726947},{0x01f10e67,0x003c73de,0x022b7ea2,0x010f32c2,0x03ff776a,0x00142277,0x01d38b88,0x00776138,0x03c60822,0x01201140}},
+	{{0x0236d175,0x0008748e,0x03c6476d,0x013f4cdc,0x02eed02a,0x00838a47,0x032e7210,0x018bcbb3,0x00858de4,0x01dc7826},{0x00a37fc7,0x0127b40b,0x01957884,0x011d30ad,0x02816683,0x016e0e23,0x00b76be4,0x012db115,0x02516506,0x0154ce62},{0x00451edf,0x00bd749e,0x03997342,0x01cc2c4c,0x00eb6975,0x01a59508,0x03a516cf,0x00c228ef,0x0168ff5a,0x01697b47}},
+	{{0x00527359,0x01783156,0x03afd75c,0x00ce56dc,0x00e4b970,0x001cabe9,0x029e0f6d,0x0188850c,0x0135fefd,0x00066d80},{0x02150e83,0x01448abf,0x02bb0232,0x012bf259,0x033c8268,0x00711e20,0x03fc148f,0x005e0e70,0x017d8bf9,0x0112b2e2},{0x02134b83,0x001a0517,0x0182c3cc,0x00792182,0x0313d799,0x001a3ed7,0x0344547e,0x01f24a0d,0x03de6ad2,0x00543127}},
+	{{0x00dca868,0x00618f27,0x015a1709,0x00ddc38a,0x0320fd13,0x0036168d,0x0371ab06,0x01783fc7,0x0391e05f,0x01e29b5d},{0x01471138,0x00fca542,0x00ca31cf,0x01ca7bad,0x0175bfbc,0x01a708ad,0x03bce212,0x01244215,0x0075bb99,0x01acad68},{0x03a0b976,0x01dc12d1,0x011aab17,0x00aba0ba,0x029806cd,0x0142f590,0x018fd8ea,0x01a01545,0x03c4ad55,0x01c971ff}},
+	{{0x00d098c0,0x000afdc7,0x006cd230,0x01276af3,0x03f905b2,0x0102994c,0x002eb8a4,0x015cfbeb,0x025f855f,0x01335518},{0x01cf99b2,0x0099c574,0x01a69c88,0x00881510,0x01cd4b54,0x0112109f,0x008abdc5,0x0074647a,0x0277cb1f,0x01e53324},{0x02ac5053,0x01b109b0,0x024b095e,0x016997b3,0x02f26bb6,0x00311021,0x00197885,0x01d0a55a,0x03b6fcc8,0x01c020d5}},
+	{{0x02584a34,0x00e7eee0,0x03257a03,0x011e95a3,0x011ead91,0x00536202,0x00b1ce24,0x008516c6,0x03669d6d,0x004ea4a8},{0x00773f01,0x0019c9ce,0x019f6171,0x01d4afde,0x02e33323,0x01ad29b6,0x02ead1dc,0x01ed51a5,0x01851ad0,0x001bbdfa},{0x00577de5,0x00ddc730,0x038b9952,0x00f281ae,0x01d50390,0x0002e071,0x000780ec,0x010d448d,0x01f8a2af,0x00f0a5b7}},
+	{{0x031f2541,0x00d34bae,0x0323ff9d,0x003a056d,0x02e25443,0x00a1ad05,0x00d1bee8,0x002f7f8e,0x03007477,0x002a24b1},{0x0114a713,0x01457e76,0x032255d5,0x01cc647f,0x02a4bdef,0x0153d730,0x00118bcf,0x00f755ff,0x013490c7,0x01ea674e},{0x02bda3e8,0x00bb490d,0x00f291ea,0x000abf40,0x01dea321,0x002f9ce0,0x00b2b193,0x00fa54b5,0x0128302f,0x00a19d8b}},
+	{{0x022ef5bd,0x01638af3,0x038c6f8a,0x01a33a3d,0x039261b2,0x01bb89b8,0x010bcf9d,0x00cf42a9,0x023d6f17,0x01da1bca},{0x00e35b25,0x000d824f,0x0152e9cf,0x00ed935d,0x020b8460,0x01c7b83f,0x00c969e5,0x01a74198,0x0046a9d9,0x00cbc768},{0x01597c6a,0x0144a99b,0x00a57551,0x0018269c,0x023c464c,0x0009b022,0x00ee39e1,0x0114c7f2,0x038a9ad2,0x01584c17}},
+	{{0x03b0c0d5,0x00b30a39,0x038a6ce4,0x01ded83a,0x01c277a6,0x01010a61,0x0346d3eb,0x018d995e,0x02f2c57c,0x000c286b},{0x0092aed1,0x0125e37b,0x027ca201,0x001a6b6b,0x03290f55,0x0047ba48,0x018d916c,0x01a59062,0x013e35d4,0x0002abb1},{0x003ad2aa,0x007ddcc0,0x00c10f76,0x0001590b,0x002cfca6,0x000ed23e,0x00ee4329,0x00900f04,0x01c24065,0x0082fa70}},
+	{{0x02025e60,0x003912b8,0x0327041c,0x017e5ee5,0x02c0ecec,0x015a0d1c,0x02b1ce7c,0x0062220b,0x0145067e,0x01a5d931},{0x009673a6,0x00e1f609,0x00927c2a,0x016faa37,0x01650ef0,0x016f63b5,0x03cd40e1,0x003bc38f,0x0361f0ac,0x01d42acc},{0x02f81037,0x008ca0e8,0x017e23d1,0x011debfe,0x01bcbb68,0x002e2563,0x03e8add6,0x000816e5,0x03fb7075,0x0153e5ac}},
+	{{0x02b11ecd,0x016bf185,0x008f22ef,0x00e7d2bb,0x0225d92e,0x00ece785,0x00508873,0x017e16f5,0x01fbe85d,0x01e39a0e},{0x01669279,0x017c810a,0x024941f5,0x0023ebeb,0x00eb7688,0x005760f1,0x02ca4146,0x0073cde7,0x0052bb75,0x00f5ffa7},{0x03b8856b,0x00cb7dcd,0x02f14e06,0x001820d0,0x01d74175,0x00e59e22,0x03fba550,0x00484641,0x03350088,0x01c3c9a3}},
+	{{0x00dcf355,0x0104481c,0x0022e464,0x01f73fe7,0x00e03325,0x0152b698,0x02ef769a,0x00973663,0x00039b8c,0x0101395b},{0x01805f47,0x019160ec,0x03832cd0,0x008b06eb,0x03d4d717,0x004cb006,0x03a75b8f,0x013b3d30,0x01cfad88,0x01f034d1},{0x0078338a,0x01c7d2e3,0x02bc2b23,0x018b3f05,0x0280d9aa,0x005f3d44,0x0220a95a,0x00eeeb97,0x0362aaec,0x00835d51}},
+	{{0x01b9f543,0x013fac4d,0x02ad93ae,0x018ef464,0x0212cdf7,0x01138ba9,0x011583ab,0x019c3d26,0x028790b4,0x00e2e2b6},{0x033bb758,0x01f0dbf1,0x03734bd1,0x0129b1e5,0x02b3950e,0x003bc922,0x01a53ec8,0x018c5532,0x006f3cee,0x00ae3c79},{0x0351f95d,0x0012a737,0x03d596b8,0x017658fe,0x00ace54a,0x008b66da,0x0036c599,0x012a63a2,0x032ceba1,0x00126bac}},
+	{{0x03dcfe7e,0x019f4f18,0x01c81aee,0x0044bc2b,0x00827165,0x014f7c13,0x03b430f0,0x00bf96cc,0x020c8d62,0x01471997},{0x01fc7931,0x001f42dd,0x00ba754a,0x005bd339,0x003fbe49,0x016b3930,0x012a159c,0x009f83b0,0x03530f67,0x01e57b85},{0x02ecbd81,0x0096c294,0x01fce4a9,0x017701a5,0x0175047d,0x00ee4a31,0x012686e5,0x008efcd4,0x0349dc54,0x01b3466f}},
+	{{0x02179ca3,0x01d86414,0x03f0afd0,0x00305964,0x015c7428,0x0099711e,0x015d5442,0x00c71014,0x01b40b2e,0x01d483cf},{0x01afc386,0x01984859,0x036203ff,0x0045c6a8,0x0020a8aa,0x00990baa,0x03313f10,0x007ceede,0x027429e4,0x017806ce},{0x039357a1,0x0142f8f4,0x0294a7b6,0x00eaccf4,0x0259edb3,0x01311e6e,0x004d326f,0x0130c346,0x01ccef3c,0x01c424b2}},
+	{{0x0364918c,0x00148fc0,0x01638a7b,0x01a1fd5b,0x028ad013,0x0081e5a4,0x01a54f33,0x0174e101,0x003d0257,0x003a856c},{0x00051dcf,0x00f62b1d,0x0143d0ad,0x0042adbd,0x000fda90,0x01743ceb,0x0173e5e4,0x017bc749,0x03b7137a,0x0105ce96},{0x00f9218a,0x015b8c7c,0x00e102f8,0x0158d7e2,0x0169a5b8,0x00b2f176,0x018b347a,0x014cfef2,0x0214a4e3,0x017f1595}},
+	{{0x006d7ae5,0x0195c371,0x0391e26d,0x0062a7c6,0x003f42ab,0x010dad86,0x024f8198,0x01542b2a,0x0014c454,0x0189c471},{0x0390988e,0x00b8799d,0x02e44912,0x0078e2e6,0x00075654,0x01923eed,0x0040cd72,0x00a37c76,0x0009d466,0x00c8531d},{0x02651770,0x00609d01,0x0286c265,0x0134513c,0x00ee9281,0x005d223c,0x035c760c,0x00679b36,0x0073ecb8,0x016faa50}},
+	{{0x02c89be4,0x016fc244,0x02f38c83,0x018beb72,0x02b3ce2c,0x0097b065,0x034f017b,0x01dd957f,0x00148f61,0x00eab357},{0x0343d2f8,0x003398fc,0x011e368e,0x00782a1f,0x00019eea,0x00117b6f,0x0128d0d1,0x01a5e6bb,0x01944f1b,0x012b41e1},{0x03318301,0x018ecd30,0x0104d0b1,0x0038398b,0x03726701,0x019da88c,0x002d9769,0x00a7a681,0x031d9028,0x00ebfc32}},
+	{{0x0220405e,0x0171face,0x02d930f8,0x017f6d6a,0x023b8c47,0x0129d5f9,0x02972456,0x00a3a524,0x006f4cd2,0x004439fa},{0x00c53505,0x0190c2fd,0x00507244,0x009930f9,0x01a39270,0x01d327c6,0x0399bc47,0x01cfe13d,0x0332bd99,0x00b33e7d},{0x0203f5e4,0x003627b5,0x00018af8,0x01478581,0x004a2218,0x002e3bb7,0x039384d0,0x0146ea62,0x020b9693,0x0017155f}},
+	{{0x03c97e6f,0x00738c47,0x03b5db1f,0x01808fcf,0x01e8fc98,0x01ed25dd,0x01bf5045,0x00eb5c2b,0x0178fe98,0x01b85530},{0x01c20eb0,0x01aeec22,0x030b9eee,0x01b7d07e,0x0187e16f,0x014421fb,0x009fa731,0x0040b6d7,0x00841861,0x00a27fbc},{0x02d69abf,0x0058cdbf,0x0129f9ec,0x013c19ae,0x026c5b93,0x013a7fe7,0x004bb2ba,0x0063226f,0x002a95ca,0x01abefd9}},
+	{{0x02f5d2c1,0x00378318,0x03734fb5,0x01258073,0x0263f0f6,0x01ad70e0,0x01b56d06,0x01188fbd,0x011b9503,0x0036d2e1},{0x0113a8cc,0x01541c3e,0x02ac2bbc,0x01d95867,0x01f47459,0x00ead489,0x00ab5b48,0x01db3b45,0x00edb801,0x004b024f},{0x00b8190f,0x011fe4c2,0x00621f82,0x010508d7,0x001a5a76,0x00c7d7fd,0x03aab96d,0x019cd9dc,0x019c6635,0x00ceaa1e}},
+	{{0x01085cf2,0x01fd47af,0x03e3f5e1,0x004b3e99,0x01e3d46a,0x0060033c,0x015ff0a8,0x0150cdd8,0x029e8e21,0x008cf1bc},{0x00156cb1,0x003d623f,0x01a4f069,0x00d8d053,0x01b68aea,0x01ca5ab6,0x0316ae43,0x0134dc44,0x001c8d58,0x0084b343},{0x0318c781,0x0135441f,0x03a51a5e,0x019293f4,0x0048bb37,0x013d3341,0x0143151e,0x019c74e1,0x00911914,0x0076ddde}},
+	{{0x006bc26f,0x00d48e5f,0x00227bbe,0x00629ea8,0x01ea5f8b,0x0179a330,0x027a1d5f,0x01bf8f8e,0x02d26e2a,0x00c6b65e},{0x01701ab6,0x0051da77,0x01b4b667,0x00a0ce7c,0x038ae37b,0x012ac852,0x03a0b0fe,0x0097c2bb,0x00a017d2,0x01eb8b2a},{0x0120b962,0x0005fb42,0x0353b6fd,0x0061f8ce,0x007a1463,0x01560a64,0x00e0a792,0x01907c92,0x013a6622,0x007b47f1}}
+};

src/external/ed25519-donna/ed25519-donna-64bit-sse2.h

@@ -0,0 +1,436 @@
+#if defined(ED25519_GCC_64BIT_SSE_CHOOSE)
+
+#define HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS
+
+DONNA_NOINLINE static void
+ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
+	int64_t breg = (int64_t)b;
+	uint64_t sign = (uint64_t)breg >> 63;
+	uint64_t mask = ~(sign - 1);
+	uint64_t u = (breg + mask) ^ mask;
+
+	__asm__ __volatile__ (
+		/* ysubx+xaddy+t2d */
+		"movq %0, %%rax                  ;\n"
+		"movd %%rax, %%xmm14             ;\n"
+		"pshufd $0x00, %%xmm14, %%xmm14  ;\n"
+		"pxor %%xmm0, %%xmm0             ;\n"
+		"pxor %%xmm1, %%xmm1             ;\n"
+		"pxor %%xmm2, %%xmm2             ;\n"
+		"pxor %%xmm3, %%xmm3             ;\n"
+		"pxor %%xmm4, %%xmm4             ;\n"
+		"pxor %%xmm5, %%xmm5             ;\n"
+
+		/* 0 */
+		"movq $0, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm6              ;\n"
+		"pxor %%xmm7, %%xmm7             ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm6, %%xmm2              ;\n"
+		"por %%xmm7, %%xmm3              ;\n"
+
+		/* 1 */
+		"movq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 0(%1), %%xmm6            ;\n"
+		"movdqa 16(%1), %%xmm7           ;\n"
+		"movdqa 32(%1), %%xmm8           ;\n"
+		"movdqa 48(%1), %%xmm9           ;\n"
+		"movdqa 64(%1), %%xmm10          ;\n"
+		"movdqa 80(%1), %%xmm11          ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 2 */
+		"movq $2, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 96(%1), %%xmm6           ;\n"
+		"movdqa 112(%1), %%xmm7          ;\n"
+		"movdqa 128(%1), %%xmm8          ;\n"
+		"movdqa 144(%1), %%xmm9          ;\n"
+		"movdqa 160(%1), %%xmm10         ;\n"
+		"movdqa 176(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 3 */
+		"movq $3, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 192(%1), %%xmm6          ;\n"
+		"movdqa 208(%1), %%xmm7          ;\n"
+		"movdqa 224(%1), %%xmm8          ;\n"
+		"movdqa 240(%1), %%xmm9          ;\n"
+		"movdqa 256(%1), %%xmm10         ;\n"
+		"movdqa 272(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 4 */
+		"movq $4, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 288(%1), %%xmm6          ;\n"
+		"movdqa 304(%1), %%xmm7          ;\n"
+		"movdqa 320(%1), %%xmm8          ;\n"
+		"movdqa 336(%1), %%xmm9          ;\n"
+		"movdqa 352(%1), %%xmm10         ;\n"
+		"movdqa 368(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 5 */
+		"movq $5, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 384(%1), %%xmm6          ;\n"
+		"movdqa 400(%1), %%xmm7          ;\n"
+		"movdqa 416(%1), %%xmm8          ;\n"
+		"movdqa 432(%1), %%xmm9          ;\n"
+		"movdqa 448(%1), %%xmm10         ;\n"
+		"movdqa 464(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 6 */
+		"movq $6, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 480(%1), %%xmm6          ;\n"
+		"movdqa 496(%1), %%xmm7          ;\n"
+		"movdqa 512(%1), %%xmm8          ;\n"
+		"movdqa 528(%1), %%xmm9          ;\n"
+		"movdqa 544(%1), %%xmm10         ;\n"
+		"movdqa 560(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 7 */
+		"movq $7, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 576(%1), %%xmm6          ;\n"
+		"movdqa 592(%1), %%xmm7          ;\n"
+		"movdqa 608(%1), %%xmm8          ;\n"
+		"movdqa 624(%1), %%xmm9          ;\n"
+		"movdqa 640(%1), %%xmm10         ;\n"
+		"movdqa 656(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 8 */
+		"movq $8, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 672(%1), %%xmm6          ;\n"
+		"movdqa 688(%1), %%xmm7          ;\n"
+		"movdqa 704(%1), %%xmm8          ;\n"
+		"movdqa 720(%1), %%xmm9          ;\n"
+		"movdqa 736(%1), %%xmm10         ;\n"
+		"movdqa 752(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* conditionally swap ysubx and xaddy */
+		"movq %3, %%rax                  ;\n"
+		"xorq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm14             ;\n"
+		"pxor %%xmm15, %%xmm15           ;\n"
+		"pshufd $0x00, %%xmm14, %%xmm14  ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa %%xmm2, %%xmm6           ;\n"
+		"movdqa %%xmm3, %%xmm7           ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pxor %%xmm6, %%xmm0             ;\n"
+		"pxor %%xmm7, %%xmm1             ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+
+		/* store ysubx */
+		"xorq %%rax, %%rax               ;\n"
+		"movd %%xmm0, %%rcx              ;\n"
+		"movd %%xmm0, %%r8               ;\n"
+		"movd %%xmm1, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm0, %%xmm0    ;\n"
+		"pshufd $0xee, %%xmm1, %%xmm1    ;\n"
+		"movd %%xmm0, %%rdx              ;\n"
+		"movd %%xmm1, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"movq %%rcx, %%r9                ;\n"
+		"movq %%r8, %%r10                ;\n"
+		"movq %%rdx, %%r11               ;\n"
+		"movq %%rsi, %%r12               ;\n"
+		"movq %%rdi, %%r13               ;\n"
+		"shrq $26, %%r9                  ;\n"
+		"shrq $26, %%r10                 ;\n"
+		"shrq $26, %%r11                 ;\n"
+		"shrq $26, %%r12                 ;\n"
+		"shrq $26, %%r13                 ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"andl $0x1ffffff, %%r9d          ;\n"
+		"andl $0x3ffffff, %%r8d          ;\n"
+		"andl $0x1ffffff, %%r10d         ;\n"
+		"andl $0x3ffffff, %%edx          ;\n"
+		"andl $0x1ffffff, %%r11d         ;\n"
+		"andl $0x3ffffff, %%esi          ;\n"
+		"andl $0x1ffffff, %%r12d         ;\n"
+		"andl $0x3ffffff, %%edi          ;\n"
+		"andl $0x1ffffff, %%r13d         ;\n"
+		"movl %%ecx, 0(%2)               ;\n"
+		"movl %%r9d, 4(%2)               ;\n"
+		"movl %%r8d, 8(%2)               ;\n"
+		"movl %%r10d, 12(%2)             ;\n"
+		"movl %%edx, 16(%2)              ;\n"
+		"movl %%r11d, 20(%2)             ;\n"
+		"movl %%esi, 24(%2)              ;\n"
+		"movl %%r12d, 28(%2)             ;\n"
+		"movl %%edi, 32(%2)              ;\n"
+		"movl %%r13d, 36(%2)             ;\n"
+		"movq %%rax, 40(%2)              ;\n"
+
+		/* store xaddy */
+		"movd %%xmm2, %%rcx              ;\n"
+		"movd %%xmm2, %%r8               ;\n"
+		"movd %%xmm3, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm2, %%xmm2    ;\n"
+		"pshufd $0xee, %%xmm3, %%xmm3    ;\n"
+		"movd %%xmm2, %%rdx              ;\n"
+		"movd %%xmm3, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"movq %%rcx, %%r9                ;\n"
+		"movq %%r8, %%r10                ;\n"
+		"movq %%rdx, %%r11               ;\n"
+		"movq %%rsi, %%r12               ;\n"
+		"movq %%rdi, %%r13               ;\n"
+		"shrq $26, %%r9                  ;\n"
+		"shrq $26, %%r10                 ;\n"
+		"shrq $26, %%r11                 ;\n"
+		"shrq $26, %%r12                 ;\n"
+		"shrq $26, %%r13                 ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"andl $0x1ffffff, %%r9d          ;\n"
+		"andl $0x3ffffff, %%r8d          ;\n"
+		"andl $0x1ffffff, %%r10d         ;\n"
+		"andl $0x3ffffff, %%edx          ;\n"
+		"andl $0x1ffffff, %%r11d         ;\n"
+		"andl $0x3ffffff, %%esi          ;\n"
+		"andl $0x1ffffff, %%r12d         ;\n"
+		"andl $0x3ffffff, %%edi          ;\n"
+		"andl $0x1ffffff, %%r13d         ;\n"
+		"movl %%ecx, 48(%2)              ;\n"
+		"movl %%r9d, 52(%2)              ;\n"
+		"movl %%r8d, 56(%2)              ;\n"
+		"movl %%r10d, 60(%2)             ;\n"
+		"movl %%edx, 64(%2)              ;\n"
+		"movl %%r11d, 68(%2)             ;\n"
+		"movl %%esi, 72(%2)              ;\n"
+		"movl %%r12d, 76(%2)             ;\n"
+		"movl %%edi, 80(%2)              ;\n"
+		"movl %%r13d, 84(%2)             ;\n"
+		"movq %%rax, 88(%2)              ;\n"
+
+		/* extract t2d */
+		"xorq %%rax, %%rax               ;\n"
+		"movd %%xmm4, %%rcx              ;\n"
+		"movd %%xmm4, %%r8               ;\n"
+		"movd %%xmm5, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm4, %%xmm4    ;\n"
+		"pshufd $0xee, %%xmm5, %%xmm5    ;\n"
+		"movd %%xmm4, %%rdx              ;\n"
+		"movd %%xmm5, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"movq %%rcx, %%r9                ;\n"
+		"movq %%r8, %%r10                ;\n"
+		"movq %%rdx, %%r11               ;\n"
+		"movq %%rsi, %%r12               ;\n"
+		"movq %%rdi, %%r13               ;\n"
+		"shrq $26, %%r9                  ;\n"
+		"shrq $26, %%r10                 ;\n"
+		"shrq $26, %%r11                 ;\n"
+		"shrq $26, %%r12                 ;\n"
+		"shrq $26, %%r13                 ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"andl $0x1ffffff, %%r9d          ;\n"
+		"andl $0x3ffffff, %%r8d          ;\n"
+		"andl $0x1ffffff, %%r10d         ;\n"
+		"andl $0x3ffffff, %%edx          ;\n"
+		"andl $0x1ffffff, %%r11d         ;\n"
+		"andl $0x3ffffff, %%esi          ;\n"
+		"andl $0x1ffffff, %%r12d         ;\n"
+		"andl $0x3ffffff, %%edi          ;\n"
+		"andl $0x1ffffff, %%r13d         ;\n"
+		"movd %%ecx, %%xmm0              ;\n"
+		"movd %%r9d, %%xmm4              ;\n"
+		"movd %%r8d, %%xmm8              ;\n"
+		"movd %%r10d, %%xmm3             ;\n"
+		"movd %%edx, %%xmm1              ;\n"
+		"movd %%r11d, %%xmm5             ;\n"
+		"movd %%esi, %%xmm6              ;\n"
+		"movd %%r12d, %%xmm7             ;\n"
+		"movd %%edi, %%xmm2              ;\n"
+		"movd %%r13d, %%xmm9             ;\n"
+		"punpckldq %%xmm4, %%xmm0        ;\n"
+		"punpckldq %%xmm3, %%xmm8        ;\n"
+		"punpckldq %%xmm5, %%xmm1        ;\n"
+		"punpckldq %%xmm7, %%xmm6        ;\n"
+		"punpckldq %%xmm9, %%xmm2        ;\n"
+		"punpcklqdq %%xmm8, %%xmm0       ;\n"
+		"punpcklqdq %%xmm6, %%xmm1       ;\n"
+
+		/* set up 2p in to 3/4 */
+		"movl $0x7ffffda, %%ecx          ;\n"
+		"movl $0x3fffffe, %%edx          ;\n"
+		"movl $0x7fffffe, %%eax          ;\n"
+		"movd %%ecx, %%xmm3              ;\n"
+		"movd %%edx, %%xmm5              ;\n"
+		"movd %%eax, %%xmm4              ;\n"
+		"punpckldq %%xmm5, %%xmm3        ;\n"
+		"punpckldq %%xmm5, %%xmm4        ;\n"
+		"punpcklqdq %%xmm4, %%xmm3       ;\n"
+		"movdqa %%xmm4, %%xmm5           ;\n"
+		"punpcklqdq %%xmm4, %%xmm4       ;\n"
+
+		/* subtract and conditionally move */
+		"movl %3, %%ecx                  ;\n"
+		"sub $1, %%ecx                   ;\n"
+		"movd %%ecx, %%xmm6              ;\n"
+		"pshufd $0x00, %%xmm6, %%xmm6    ;\n"
+		"movdqa %%xmm6, %%xmm7           ;\n"
+		"psubd %%xmm0, %%xmm3            ;\n"
+		"psubd %%xmm1, %%xmm4            ;\n"
+		"psubd %%xmm2, %%xmm5            ;\n"
+		"pand %%xmm6, %%xmm0             ;\n"
+		"pand %%xmm6, %%xmm1             ;\n"
+		"pand %%xmm6, %%xmm2             ;\n"
+		"pandn %%xmm3, %%xmm6            ;\n"
+		"movdqa %%xmm7, %%xmm3           ;\n"
+		"pandn %%xmm4, %%xmm7            ;\n"
+		"pandn %%xmm5, %%xmm3            ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm3, %%xmm2              ;\n"
+
+		/* store t2d */
+		"movdqa %%xmm0, 96(%2)           ;\n"
+		"movdqa %%xmm1, 112(%2)          ;\n"
+		"movdqa %%xmm2, 128(%2)          ;\n"
+		:
+		: "m"(u), "r"(&table[pos * 8]), "r"(t), "m"(sign) /* %0 = u, %1 = table, %2 = t, %3 = sign */
+		:
+			"%rax", "%rcx", "%rdx", "%rdi", "%rsi", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", 
+			"%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm14", "%xmm14",
+			"cc", "memory"
+	);
+}
+
+#endif /* defined(ED25519_GCC_64BIT_SSE_CHOOSE) */
+

src/external/ed25519-donna/ed25519-donna-64bit-tables.h

@@ -0,0 +1,53 @@
+static const ge25519 ge25519_basepoint = {
+	{0x00062d608f25d51a,0x000412a4b4f6592a,0x00075b7171a4b31d,0x0001ff60527118fe,0x000216936d3cd6e5},
+	{0x0006666666666658,0x0004cccccccccccc,0x0001999999999999,0x0003333333333333,0x0006666666666666},
+	{0x0000000000000001,0x0000000000000000,0x0000000000000000,0x0000000000000000,0x0000000000000000},
+	{0x00068ab3a5b7dda3,0x00000eea2a5eadbb,0x0002af8df483c27e,0x000332b375274732,0x00067875f0fd78b7}
+};
+
+static const bignum25519 ge25519_ecd = {
+	0x00034dca135978a3,0x0001a8283b156ebd,0x0005e7a26001c029,0x000739c663a03cbb,0x00052036cee2b6ff
+};
+
+static const bignum25519 ge25519_ec2d = {
+	0x00069b9426b2f159,0x00035050762add7a,0x0003cf44c0038052,0x0006738cc7407977,0x0002406d9dc56dff
+};
+
+static const bignum25519 ge25519_sqrtneg1 = {
+	0x00061b274a0ea0b0,0x0000d5a5fc8f189d,0x0007ef5e9cbd0c60,0x00078595a6804c9e,0x0002b8324804fc1d
+};
+
+static const ge25519_niels ge25519_niels_sliding_multiples[32] = {
+	{{0x00003905d740913e,0x0000ba2817d673a2,0x00023e2827f4e67c,0x000133d2e0c21a34,0x00044fd2f9298f81},{0x000493c6f58c3b85,0x0000df7181c325f7,0x0000f50b0b3e4cb7,0x0005329385a44c32,0x00007cf9d3a33d4b},{0x00011205877aaa68,0x000479955893d579,0x00050d66309b67a0,0x0002d42d0dbee5ee,0x0006f117b689f0c6}},
+	{{0x00011fe8a4fcd265,0x0007bcb8374faacc,0x00052f5af4ef4d4f,0x0005314098f98d10,0x0002ab91587555bd},{0x0005b0a84cee9730,0x00061d10c97155e4,0x0004059cc8096a10,0x00047a608da8014f,0x0007a164e1b9a80f},{0x0006933f0dd0d889,0x00044386bb4c4295,0x0003cb6d3162508c,0x00026368b872a2c6,0x0005a2826af12b9b}},
+	{{0x000182c3a447d6ba,0x00022964e536eff2,0x000192821f540053,0x0002f9f19e788e5c,0x000154a7e73eb1b5},{0x0002bc4408a5bb33,0x000078ebdda05442,0x0002ffb112354123,0x000375ee8df5862d,0x0002945ccf146e20},{0x0003dbf1812a8285,0x0000fa17ba3f9797,0x0006f69cb49c3820,0x00034d5a0db3858d,0x00043aabe696b3bb}},
+	{{0x00072c9aaa3221b1,0x000267774474f74d,0x000064b0e9b28085,0x0003f04ef53b27c9,0x0001d6edd5d2e531},{0x00025cd0944ea3bf,0x00075673b81a4d63,0x000150b925d1c0d4,0x00013f38d9294114,0x000461bea69283c9},{0x00036dc801b8b3a2,0x0000e0a7d4935e30,0x0001deb7cecc0d7d,0x000053a94e20dd2c,0x0007a9fbb1c6a0f9}},
+	{{0x0006217e039d8064,0x0006dea408337e6d,0x00057ac112628206,0x000647cb65e30473,0x00049c05a51fadc9},{0x0006678aa6a8632f,0x0005ea3788d8b365,0x00021bd6d6994279,0x0007ace75919e4e3,0x00034b9ed338add7},{0x0004e8bf9045af1b,0x000514e33a45e0d6,0x0007533c5b8bfe0f,0x000583557b7e14c9,0x00073c172021b008}},
+	{{0x00075b0249864348,0x00052ee11070262b,0x000237ae54fb5acd,0x0003bfd1d03aaab5,0x00018ab598029d5c},{0x000700848a802ade,0x0001e04605c4e5f7,0x0005c0d01b9767fb,0x0007d7889f42388b,0x0004275aae2546d8},{0x00032cc5fd6089e9,0x000426505c949b05,0x00046a18880c7ad2,0x0004a4221888ccda,0x0003dc65522b53df}},
+	{{0x0007013b327fbf93,0x0001336eeded6a0d,0x0002b565a2bbf3af,0x000253ce89591955,0x0000267882d17602},{0x0000c222a2007f6d,0x000356b79bdb77ee,0x00041ee81efe12ce,0x000120a9bd07097d,0x000234fd7eec346f},{0x0000a119732ea378,0x00063bf1ba8e2a6c,0x00069f94cc90df9a,0x000431d1779bfc48,0x000497ba6fdaa097}},
+	{{0x0003cd86468ccf0b,0x00048553221ac081,0x0006c9464b4e0a6e,0x00075fba84180403,0x00043b5cd4218d05},{0x0006cc0313cfeaa0,0x0001a313848da499,0x0007cb534219230a,0x00039596dedefd60,0x00061e22917f12de},{0x0002762f9bd0b516,0x0001c6e7fbddcbb3,0x00075909c3ace2bd,0x00042101972d3ec9,0x000511d61210ae4d}},
+	{{0x000386484420de87,0x0002d6b25db68102,0x000650b4962873c0,0x0004081cfd271394,0x00071a7fe6fe2482},{0x000676ef950e9d81,0x0001b81ae089f258,0x00063c4922951883,0x0002f1d54d9b3237,0x0006d325924ddb85},{0x000182b8a5c8c854,0x00073fcbe5406d8e,0x0005de3430cff451,0x000554b967ac8c41,0x0004746c4b6559ee}},
+	{{0x000546c864741147,0x0003a1df99092690,0x0001ca8cc9f4d6bb,0x00036b7fc9cd3b03,0x000219663497db5e},{0x00077b3c6dc69a2b,0x0004edf13ec2fa6e,0x0004e85ad77beac8,0x0007dba2b28e7bda,0x0005c9a51de34fe9},{0x0000f1cf79f10e67,0x00043ccb0a2b7ea2,0x00005089dfff776a,0x0001dd84e1d38b88,0x0004804503c60822}},
+	{{0x000021d23a36d175,0x0004fd3373c6476d,0x00020e291eeed02a,0x00062f2ecf2e7210,0x000771e098858de4},{0x00049ed02ca37fc7,0x000474c2b5957884,0x0005b8388e816683,0x0004b6c454b76be4,0x000553398a516506},{0x0002f5d278451edf,0x000730b133997342,0x0006965420eb6975,0x000308a3bfa516cf,0x0005a5ed1d68ff5a}},
+	{{0x0005e0c558527359,0x0003395b73afd75c,0x000072afa4e4b970,0x00062214329e0f6d,0x000019b60135fefd},{0x0005122afe150e83,0x0004afc966bb0232,0x0001c478833c8268,0x00017839c3fc148f,0x00044acb897d8bf9},{0x000068145e134b83,0x0001e4860982c3cc,0x000068fb5f13d799,0x0007c9283744547e,0x000150c49fde6ad2}},
+	{{0x0001863c9cdca868,0x0003770e295a1709,0x0000d85a3720fd13,0x0005e0ff1f71ab06,0x00078a6d7791e05f},{0x0003f29509471138,0x000729eeb4ca31cf,0x00069c22b575bfbc,0x0004910857bce212,0x0006b2b5a075bb99},{0x0007704b47a0b976,0x0002ae82e91aab17,0x00050bd6429806cd,0x00068055158fd8ea,0x000725c7ffc4ad55}},
+	{{0x00002bf71cd098c0,0x00049dabcc6cd230,0x00040a6533f905b2,0x000573efac2eb8a4,0x0004cd54625f855f},{0x00026715d1cf99b2,0x0002205441a69c88,0x000448427dcd4b54,0x0001d191e88abdc5,0x000794cc9277cb1f},{0x0006c426c2ac5053,0x0005a65ece4b095e,0x0000c44086f26bb6,0x0007429568197885,0x0007008357b6fcc8}},
+	{{0x00039fbb82584a34,0x00047a568f257a03,0x00014d88091ead91,0x0002145b18b1ce24,0x00013a92a3669d6d},{0x0000672738773f01,0x000752bf799f6171,0x0006b4a6dae33323,0x0007b54696ead1dc,0x00006ef7e9851ad0},{0x0003771cc0577de5,0x0003ca06bb8b9952,0x00000b81c5d50390,0x00043512340780ec,0x0003c296ddf8a2af}},
+	{{0x00034d2ebb1f2541,0x0000e815b723ff9d,0x000286b416e25443,0x0000bdfe38d1bee8,0x0000a892c7007477},{0x000515f9d914a713,0x00073191ff2255d5,0x00054f5cc2a4bdef,0x0003dd57fc118bcf,0x0007a99d393490c7},{0x0002ed2436bda3e8,0x00002afd00f291ea,0x0000be7381dea321,0x0003e952d4b2b193,0x000286762d28302f}},
+	{{0x00058e2bce2ef5bd,0x00068ce8f78c6f8a,0x0006ee26e39261b2,0x00033d0aa50bcf9d,0x0007686f2a3d6f17},{0x000036093ce35b25,0x0003b64d7552e9cf,0x00071ee0fe0b8460,0x00069d0660c969e5,0x00032f1da046a9d9},{0x000512a66d597c6a,0x0000609a70a57551,0x000026c08a3c464c,0x0004531fc8ee39e1,0x000561305f8a9ad2}},
+	{{0x0002cc28e7b0c0d5,0x00077b60eb8a6ce4,0x0004042985c277a6,0x000636657b46d3eb,0x000030a1aef2c57c},{0x0004978dec92aed1,0x000069adae7ca201,0x00011ee923290f55,0x00069641898d916c,0x00000aaec53e35d4},{0x0001f773003ad2aa,0x000005642cc10f76,0x00003b48f82cfca6,0x0002403c10ee4329,0x00020be9c1c24065}},
+	{{0x0000e44ae2025e60,0x0005f97b9727041c,0x0005683472c0ecec,0x000188882eb1ce7c,0x00069764c545067e},{0x000387d8249673a6,0x0005bea8dc927c2a,0x0005bd8ed5650ef0,0x0000ef0e3fcd40e1,0x000750ab3361f0ac},{0x00023283a2f81037,0x000477aff97e23d1,0x0000b8958dbcbb68,0x0000205b97e8add6,0x00054f96b3fb7075}},
+	{{0x0005afc616b11ecd,0x00039f4aec8f22ef,0x0003b39e1625d92e,0x0005f85bd4508873,0x00078e6839fbe85d},{0x0005f20429669279,0x00008fafae4941f5,0x00015d83c4eb7688,0x0001cf379eca4146,0x0003d7fe9c52bb75},{0x00032df737b8856b,0x0000608342f14e06,0x0003967889d74175,0x0001211907fba550,0x00070f268f350088}},
+	{{0x0004112070dcf355,0x0007dcff9c22e464,0x00054ada60e03325,0x00025cd98eef769a,0x000404e56c039b8c},{0x00064583b1805f47,0x00022c1baf832cd0,0x000132c01bd4d717,0x0004ecf4c3a75b8f,0x0007c0d345cfad88},{0x00071f4b8c78338a,0x00062cfc16bc2b23,0x00017cf51280d9aa,0x0003bbae5e20a95a,0x00020d754762aaec}},
+	{{0x0004feb135b9f543,0x00063bd192ad93ae,0x00044e2ea612cdf7,0x000670f4991583ab,0x00038b8ada8790b4},{0x0007c36fc73bb758,0x0004a6c797734bd1,0x0000ef248ab3950e,0x00063154c9a53ec8,0x0002b8f1e46f3cee},{0x00004a9cdf51f95d,0x0005d963fbd596b8,0x00022d9b68ace54a,0x0004a98e8836c599,0x000049aeb32ceba1}},
+	{{0x00067d3c63dcfe7e,0x000112f0adc81aee,0x00053df04c827165,0x0002fe5b33b430f0,0x00051c665e0c8d62},{0x00007d0b75fc7931,0x00016f4ce4ba754a,0x0005ace4c03fbe49,0x00027e0ec12a159c,0x000795ee17530f67},{0x00025b0a52ecbd81,0x0005dc0695fce4a9,0x0003b928c575047d,0x00023bf3512686e5,0x0006cd19bf49dc54}},
+	{{0x0007619052179ca3,0x0000c16593f0afd0,0x000265c4795c7428,0x00031c40515d5442,0x0007520f3db40b2e},{0x0006612165afc386,0x0001171aa36203ff,0x0002642ea820a8aa,0x0001f3bb7b313f10,0x0005e01b3a7429e4},{0x00050be3d39357a1,0x0003ab33d294a7b6,0x0004c479ba59edb3,0x0004c30d184d326f,0x00071092c9ccef3c}},
+	{{0x0000523f0364918c,0x000687f56d638a7b,0x00020796928ad013,0x0005d38405a54f33,0x0000ea15b03d0257},{0x0003d8ac74051dcf,0x00010ab6f543d0ad,0x0005d0f3ac0fda90,0x0005ef1d2573e5e4,0x0004173a5bb7137a},{0x00056e31f0f9218a,0x0005635f88e102f8,0x0002cbc5d969a5b8,0x000533fbc98b347a,0x0005fc565614a4e3}},
+	{{0x0006570dc46d7ae5,0x00018a9f1b91e26d,0x000436b6183f42ab,0x000550acaa4f8198,0x00062711c414c454},{0x0002e1e67790988e,0x0001e38b9ae44912,0x000648fbb4075654,0x00028df1d840cd72,0x0003214c7409d466},{0x0001827406651770,0x0004d144f286c265,0x00017488f0ee9281,0x00019e6cdb5c760c,0x0005bea94073ecb8}},
+	{{0x0005bf0912c89be4,0x00062fadcaf38c83,0x00025ec196b3ce2c,0x00077655ff4f017b,0x0003aacd5c148f61},{0x0000ce63f343d2f8,0x0001e0a87d1e368e,0x000045edbc019eea,0x0006979aed28d0d1,0x0004ad0785944f1b},{0x00063b34c3318301,0x0000e0e62d04d0b1,0x000676a233726701,0x00029e9a042d9769,0x0003aff0cb1d9028}},
+	{{0x0005c7eb3a20405e,0x0005fdb5aad930f8,0x0004a757e63b8c47,0x00028e9492972456,0x000110e7e86f4cd2},{0x0006430bf4c53505,0x000264c3e4507244,0x00074c9f19a39270,0x00073f84f799bc47,0x0002ccf9f732bd99},{0x0000d89ed603f5e4,0x00051e1604018af8,0x0000b8eedc4a2218,0x00051ba98b9384d0,0x00005c557e0b9693}},
+	{{0x0001ce311fc97e6f,0x0006023f3fb5db1f,0x0007b49775e8fc98,0x0003ad70adbf5045,0x0006e154c178fe98},{0x0006bbb089c20eb0,0x0006df41fb0b9eee,0x00051087ed87e16f,0x000102db5c9fa731,0x000289fef0841861},{0x00016336fed69abf,0x0004f066b929f9ec,0x0004e9ff9e6c5b93,0x00018c89bc4bb2ba,0x0006afbf642a95ca}},
+	{{0x0000de0c62f5d2c1,0x00049601cf734fb5,0x0006b5c38263f0f6,0x0004623ef5b56d06,0x0000db4b851b9503},{0x00055070f913a8cc,0x000765619eac2bbc,0x0003ab5225f47459,0x00076ced14ab5b48,0x00012c093cedb801},{0x00047f9308b8190f,0x000414235c621f82,0x00031f5ff41a5a76,0x0006736773aab96d,0x00033aa8799c6635}},
+	{{0x0007f51ebd085cf2,0x00012cfa67e3f5e1,0x0001800cf1e3d46a,0x00054337615ff0a8,0x000233c6f29e8e21},{0x0000f588fc156cb1,0x000363414da4f069,0x0007296ad9b68aea,0x0004d3711316ae43,0x000212cd0c1c8d58},{0x0004d5107f18c781,0x00064a4fd3a51a5e,0x0004f4cd0448bb37,0x000671d38543151e,0x0001db7778911914}},
+	{{0x000352397c6bc26f,0x00018a7aa0227bbe,0x0005e68cc1ea5f8b,0x0006fe3e3a7a1d5f,0x00031ad97ad26e2a},{0x00014769dd701ab6,0x00028339f1b4b667,0x0004ab214b8ae37b,0x00025f0aefa0b0fe,0x0007ae2ca8a017d2},{0x000017ed0920b962,0x000187e33b53b6fd,0x00055829907a1463,0x000641f248e0a792,0x0001ed1fc53a6622}}
+};

src/external/ed25519-donna/ed25519-donna-64bit-x86-32bit.h

@@ -0,0 +1,435 @@
+#if defined(ED25519_GCC_64BIT_32BIT_CHOOSE)
+
+#define HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS
+
+DONNA_NOINLINE static void
+ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
+	int64_t breg = (int64_t)b;
+	uint64_t sign = (uint64_t)breg >> 63;
+	uint64_t mask = ~(sign - 1);
+	uint64_t u = (breg + mask) ^ mask;
+
+	__asm__ __volatile__ (
+		/* ysubx+xaddy+t2d */
+		"movq %0, %%rax                  ;\n"
+		"movd %%rax, %%xmm14             ;\n"
+		"pshufd $0x00, %%xmm14, %%xmm14  ;\n"
+		"pxor %%xmm0, %%xmm0             ;\n"
+		"pxor %%xmm1, %%xmm1             ;\n"
+		"pxor %%xmm2, %%xmm2             ;\n"
+		"pxor %%xmm3, %%xmm3             ;\n"
+		"pxor %%xmm4, %%xmm4             ;\n"
+		"pxor %%xmm5, %%xmm5             ;\n"
+
+		/* 0 */
+		"movq $0, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm6              ;\n"
+		"pxor %%xmm7, %%xmm7             ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm6, %%xmm2              ;\n"
+		"por %%xmm7, %%xmm3              ;\n"
+
+		/* 1 */
+		"movq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 0(%1), %%xmm6            ;\n"
+		"movdqa 16(%1), %%xmm7           ;\n"
+		"movdqa 32(%1), %%xmm8           ;\n"
+		"movdqa 48(%1), %%xmm9           ;\n"
+		"movdqa 64(%1), %%xmm10          ;\n"
+		"movdqa 80(%1), %%xmm11          ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 2 */
+		"movq $2, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 96(%1), %%xmm6           ;\n"
+		"movdqa 112(%1), %%xmm7          ;\n"
+		"movdqa 128(%1), %%xmm8          ;\n"
+		"movdqa 144(%1), %%xmm9          ;\n"
+		"movdqa 160(%1), %%xmm10         ;\n"
+		"movdqa 176(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 3 */
+		"movq $3, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 192(%1), %%xmm6          ;\n"
+		"movdqa 208(%1), %%xmm7          ;\n"
+		"movdqa 224(%1), %%xmm8          ;\n"
+		"movdqa 240(%1), %%xmm9          ;\n"
+		"movdqa 256(%1), %%xmm10         ;\n"
+		"movdqa 272(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 4 */
+		"movq $4, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 288(%1), %%xmm6          ;\n"
+		"movdqa 304(%1), %%xmm7          ;\n"
+		"movdqa 320(%1), %%xmm8          ;\n"
+		"movdqa 336(%1), %%xmm9          ;\n"
+		"movdqa 352(%1), %%xmm10         ;\n"
+		"movdqa 368(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 5 */
+		"movq $5, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 384(%1), %%xmm6          ;\n"
+		"movdqa 400(%1), %%xmm7          ;\n"
+		"movdqa 416(%1), %%xmm8          ;\n"
+		"movdqa 432(%1), %%xmm9          ;\n"
+		"movdqa 448(%1), %%xmm10         ;\n"
+		"movdqa 464(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 6 */
+		"movq $6, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 480(%1), %%xmm6          ;\n"
+		"movdqa 496(%1), %%xmm7          ;\n"
+		"movdqa 512(%1), %%xmm8          ;\n"
+		"movdqa 528(%1), %%xmm9          ;\n"
+		"movdqa 544(%1), %%xmm10         ;\n"
+		"movdqa 560(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 7 */
+		"movq $7, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 576(%1), %%xmm6          ;\n"
+		"movdqa 592(%1), %%xmm7          ;\n"
+		"movdqa 608(%1), %%xmm8          ;\n"
+		"movdqa 624(%1), %%xmm9          ;\n"
+		"movdqa 640(%1), %%xmm10         ;\n"
+		"movdqa 656(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 8 */
+		"movq $8, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 672(%1), %%xmm6          ;\n"
+		"movdqa 688(%1), %%xmm7          ;\n"
+		"movdqa 704(%1), %%xmm8          ;\n"
+		"movdqa 720(%1), %%xmm9          ;\n"
+		"movdqa 736(%1), %%xmm10         ;\n"
+		"movdqa 752(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* conditionally swap ysubx and xaddy */
+		"movq %3, %%rax                  ;\n"
+		"xorq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm14             ;\n"
+		"pxor %%xmm15, %%xmm15           ;\n"
+		"pshufd $0x00, %%xmm14, %%xmm14  ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa %%xmm2, %%xmm6           ;\n"
+		"movdqa %%xmm3, %%xmm7           ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pxor %%xmm6, %%xmm0             ;\n"
+		"pxor %%xmm7, %%xmm1             ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+
+		/* store ysubx */
+		"xorq %%rax, %%rax               ;\n"
+		"movd %%xmm0, %%rcx              ;\n"
+		"movd %%xmm0, %%r8               ;\n"
+		"movd %%xmm1, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm0, %%xmm0    ;\n"
+		"pshufd $0xee, %%xmm1, %%xmm1    ;\n"
+		"movd %%xmm0, %%rdx              ;\n"
+		"movd %%xmm1, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"movq %%rcx, %%r9                ;\n"
+		"movq %%r8, %%r10                ;\n"
+		"movq %%rdx, %%r11               ;\n"
+		"movq %%rsi, %%r12               ;\n"
+		"movq %%rdi, %%r13               ;\n"
+		"shrq $26, %%r9                  ;\n"
+		"shrq $26, %%r10                 ;\n"
+		"shrq $26, %%r11                 ;\n"
+		"shrq $26, %%r12                 ;\n"
+		"shrq $26, %%r13                 ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"andl $0x1ffffff, %%r9d          ;\n"
+		"andl $0x3ffffff, %%r8d          ;\n"
+		"andl $0x1ffffff, %%r10d         ;\n"
+		"andl $0x3ffffff, %%edx          ;\n"
+		"andl $0x1ffffff, %%r11d         ;\n"
+		"andl $0x3ffffff, %%esi          ;\n"
+		"andl $0x1ffffff, %%r12d         ;\n"
+		"andl $0x3ffffff, %%edi          ;\n"
+		"andl $0x1ffffff, %%r13d         ;\n"
+		"movl %%ecx, 0(%2)               ;\n"
+		"movl %%r9d, 4(%2)               ;\n"
+		"movl %%r8d, 8(%2)               ;\n"
+		"movl %%r10d, 12(%2)             ;\n"
+		"movl %%edx, 16(%2)              ;\n"
+		"movl %%r11d, 20(%2)             ;\n"
+		"movl %%esi, 24(%2)              ;\n"
+		"movl %%r12d, 28(%2)             ;\n"
+		"movl %%edi, 32(%2)              ;\n"
+		"movl %%r13d, 36(%2)             ;\n"
+
+		/* store xaddy */
+		"movd %%xmm2, %%rcx              ;\n"
+		"movd %%xmm2, %%r8               ;\n"
+		"movd %%xmm3, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm2, %%xmm2    ;\n"
+		"pshufd $0xee, %%xmm3, %%xmm3    ;\n"
+		"movd %%xmm2, %%rdx              ;\n"
+		"movd %%xmm3, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"movq %%rcx, %%r9                ;\n"
+		"movq %%r8, %%r10                ;\n"
+		"movq %%rdx, %%r11               ;\n"
+		"movq %%rsi, %%r12               ;\n"
+		"movq %%rdi, %%r13               ;\n"
+		"shrq $26, %%r9                  ;\n"
+		"shrq $26, %%r10                 ;\n"
+		"shrq $26, %%r11                 ;\n"
+		"shrq $26, %%r12                 ;\n"
+		"shrq $26, %%r13                 ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"andl $0x1ffffff, %%r9d          ;\n"
+		"andl $0x3ffffff, %%r8d          ;\n"
+		"andl $0x1ffffff, %%r10d         ;\n"
+		"andl $0x3ffffff, %%edx          ;\n"
+		"andl $0x1ffffff, %%r11d         ;\n"
+		"andl $0x3ffffff, %%esi          ;\n"
+		"andl $0x1ffffff, %%r12d         ;\n"
+		"andl $0x3ffffff, %%edi          ;\n"
+		"andl $0x1ffffff, %%r13d         ;\n"
+		"movl %%ecx, 40(%2)              ;\n"
+		"movl %%r9d, 44(%2)              ;\n"
+		"movl %%r8d, 48(%2)              ;\n"
+		"movl %%r10d, 52(%2)             ;\n"
+		"movl %%edx, 56(%2)              ;\n"
+		"movl %%r11d, 60(%2)             ;\n"
+		"movl %%esi, 64(%2)              ;\n"
+		"movl %%r12d, 68(%2)             ;\n"
+		"movl %%edi, 72(%2)              ;\n"
+		"movl %%r13d, 76(%2)             ;\n"
+
+		/* extract t2d */
+		"xorq %%rax, %%rax               ;\n"
+		"movd %%xmm4, %%rcx              ;\n"
+		"movd %%xmm4, %%r8               ;\n"
+		"movd %%xmm5, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm4, %%xmm4    ;\n"
+		"pshufd $0xee, %%xmm5, %%xmm5    ;\n"
+		"movd %%xmm4, %%rdx              ;\n"
+		"movd %%xmm5, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"movq %%rcx, %%r9                ;\n"
+		"movq %%r8, %%r10                ;\n"
+		"movq %%rdx, %%r11               ;\n"
+		"movq %%rsi, %%r12               ;\n"
+		"movq %%rdi, %%r13               ;\n"
+		"shrq $26, %%r9                  ;\n"
+		"shrq $26, %%r10                 ;\n"
+		"shrq $26, %%r11                 ;\n"
+		"shrq $26, %%r12                 ;\n"
+		"shrq $26, %%r13                 ;\n"
+		"andl $0x3ffffff, %%ecx          ;\n"
+		"andl $0x1ffffff, %%r9d          ;\n"
+		"andl $0x3ffffff, %%r8d          ;\n"
+		"andl $0x1ffffff, %%r10d         ;\n"
+		"andl $0x3ffffff, %%edx          ;\n"
+		"andl $0x1ffffff, %%r11d         ;\n"
+		"andl $0x3ffffff, %%esi          ;\n"
+		"andl $0x1ffffff, %%r12d         ;\n"
+		"andl $0x3ffffff, %%edi          ;\n"
+		"andl $0x1ffffff, %%r13d         ;\n"
+		"movd %%ecx, %%xmm0              ;\n"
+		"movd %%r9d, %%xmm4              ;\n"
+		"movd %%r8d, %%xmm8              ;\n"
+		"movd %%r10d, %%xmm3             ;\n"
+		"movd %%edx, %%xmm1              ;\n"
+		"movd %%r11d, %%xmm5             ;\n"
+		"movd %%esi, %%xmm6              ;\n"
+		"movd %%r12d, %%xmm7             ;\n"
+		"movd %%edi, %%xmm2              ;\n"
+		"movd %%r13d, %%xmm9             ;\n"
+		"punpckldq %%xmm4, %%xmm0        ;\n"
+		"punpckldq %%xmm3, %%xmm8        ;\n"
+		"punpckldq %%xmm5, %%xmm1        ;\n"
+		"punpckldq %%xmm7, %%xmm6        ;\n"
+		"punpckldq %%xmm9, %%xmm2        ;\n"
+		"punpcklqdq %%xmm8, %%xmm0       ;\n"
+		"punpcklqdq %%xmm6, %%xmm1       ;\n"
+
+		/* set up 2p in to 3/4 */
+		"movl $0x7ffffda, %%ecx          ;\n"
+		"movl $0x3fffffe, %%edx          ;\n"
+		"movl $0x7fffffe, %%eax          ;\n"
+		"movd %%ecx, %%xmm3              ;\n"
+		"movd %%edx, %%xmm5              ;\n"
+		"movd %%eax, %%xmm4              ;\n"
+		"punpckldq %%xmm5, %%xmm3        ;\n"
+		"punpckldq %%xmm5, %%xmm4        ;\n"
+		"punpcklqdq %%xmm4, %%xmm3       ;\n"
+		"movdqa %%xmm4, %%xmm5           ;\n"
+		"punpcklqdq %%xmm4, %%xmm4       ;\n"
+
+		/* subtract and conditionally move */
+		"movl %3, %%ecx                  ;\n"
+		"sub $1, %%ecx                   ;\n"
+		"movd %%ecx, %%xmm6              ;\n"
+		"pshufd $0x00, %%xmm6, %%xmm6    ;\n"
+		"movdqa %%xmm6, %%xmm7           ;\n"
+		"psubd %%xmm0, %%xmm3            ;\n"
+		"psubd %%xmm1, %%xmm4            ;\n"
+		"psubd %%xmm2, %%xmm5            ;\n"
+		"pand %%xmm6, %%xmm0             ;\n"
+		"pand %%xmm6, %%xmm1             ;\n"
+		"pand %%xmm6, %%xmm2             ;\n"
+		"pandn %%xmm3, %%xmm6            ;\n"
+		"movdqa %%xmm7, %%xmm3           ;\n"
+		"pandn %%xmm4, %%xmm7            ;\n"
+		"pandn %%xmm5, %%xmm3            ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm3, %%xmm2              ;\n"
+
+		/* store t2d */
+		"movdqa %%xmm0, 80(%2)           ;\n"
+		"movdqa %%xmm1, 96(%2)          ;\n"
+		"movd %%xmm2, %%rax              ;\n"
+		"movq %%rax, 112(%2)             ;\n"
+		:
+		: "m"(u), "r"(&table[pos * 8]), "r"(t), "m"(sign) /* %0 = u, %1 = table, %2 = t, %3 = sign */
+		:
+			"%rax", "%rcx", "%rdx", "%rdi", "%rsi", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", 
+			"%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm14", "%xmm14",
+			"cc", "memory"
+	);
+}
+
+#endif /* defined(ED25519_GCC_64BIT_32BIT_CHOOSE) */
+

src/external/ed25519-donna/ed25519-donna-64bit-x86.h

@@ -0,0 +1,351 @@
+#if defined(ED25519_GCC_64BIT_X86_CHOOSE)
+
+#define HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS
+
+DONNA_NOINLINE static void
+ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
+	int64_t breg = (int64_t)b;
+	uint64_t sign = (uint64_t)breg >> 63;
+	uint64_t mask = ~(sign - 1);
+	uint64_t u = (breg + mask) ^ mask;
+
+	__asm__ __volatile__ (
+		/* ysubx+xaddy+t2d */
+		"movq %0, %%rax                  ;\n"
+		"movd %%rax, %%xmm14             ;\n"
+		"pshufd $0x00, %%xmm14, %%xmm14  ;\n"
+		"pxor %%xmm0, %%xmm0             ;\n"
+		"pxor %%xmm1, %%xmm1             ;\n"
+		"pxor %%xmm2, %%xmm2             ;\n"
+		"pxor %%xmm3, %%xmm3             ;\n"
+		"pxor %%xmm4, %%xmm4             ;\n"
+		"pxor %%xmm5, %%xmm5             ;\n"
+
+		/* 0 */
+		"movq $0, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm6              ;\n"
+		"pxor %%xmm7, %%xmm7             ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm6, %%xmm2              ;\n"
+		"por %%xmm7, %%xmm3              ;\n"
+
+		/* 1 */
+		"movq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 0(%1), %%xmm6            ;\n"
+		"movdqa 16(%1), %%xmm7           ;\n"
+		"movdqa 32(%1), %%xmm8           ;\n"
+		"movdqa 48(%1), %%xmm9           ;\n"
+		"movdqa 64(%1), %%xmm10          ;\n"
+		"movdqa 80(%1), %%xmm11          ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 2 */
+		"movq $2, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 96(%1), %%xmm6           ;\n"
+		"movdqa 112(%1), %%xmm7          ;\n"
+		"movdqa 128(%1), %%xmm8          ;\n"
+		"movdqa 144(%1), %%xmm9          ;\n"
+		"movdqa 160(%1), %%xmm10         ;\n"
+		"movdqa 176(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 3 */
+		"movq $3, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 192(%1), %%xmm6          ;\n"
+		"movdqa 208(%1), %%xmm7          ;\n"
+		"movdqa 224(%1), %%xmm8          ;\n"
+		"movdqa 240(%1), %%xmm9          ;\n"
+		"movdqa 256(%1), %%xmm10         ;\n"
+		"movdqa 272(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 4 */
+		"movq $4, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 288(%1), %%xmm6          ;\n"
+		"movdqa 304(%1), %%xmm7          ;\n"
+		"movdqa 320(%1), %%xmm8          ;\n"
+		"movdqa 336(%1), %%xmm9          ;\n"
+		"movdqa 352(%1), %%xmm10         ;\n"
+		"movdqa 368(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 5 */
+		"movq $5, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 384(%1), %%xmm6          ;\n"
+		"movdqa 400(%1), %%xmm7          ;\n"
+		"movdqa 416(%1), %%xmm8          ;\n"
+		"movdqa 432(%1), %%xmm9          ;\n"
+		"movdqa 448(%1), %%xmm10         ;\n"
+		"movdqa 464(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 6 */
+		"movq $6, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 480(%1), %%xmm6          ;\n"
+		"movdqa 496(%1), %%xmm7          ;\n"
+		"movdqa 512(%1), %%xmm8          ;\n"
+		"movdqa 528(%1), %%xmm9          ;\n"
+		"movdqa 544(%1), %%xmm10         ;\n"
+		"movdqa 560(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 7 */
+		"movq $7, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 576(%1), %%xmm6          ;\n"
+		"movdqa 592(%1), %%xmm7          ;\n"
+		"movdqa 608(%1), %%xmm8          ;\n"
+		"movdqa 624(%1), %%xmm9          ;\n"
+		"movdqa 640(%1), %%xmm10         ;\n"
+		"movdqa 656(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* 8 */
+		"movq $8, %%rax                  ;\n"
+		"movd %%rax, %%xmm15             ;\n"
+		"pshufd $0x00, %%xmm15, %%xmm15  ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa 672(%1), %%xmm6          ;\n"
+		"movdqa 688(%1), %%xmm7          ;\n"
+		"movdqa 704(%1), %%xmm8          ;\n"
+		"movdqa 720(%1), %%xmm9          ;\n"
+		"movdqa 736(%1), %%xmm10         ;\n"
+		"movdqa 752(%1), %%xmm11         ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pand %%xmm15, %%xmm8            ;\n"
+		"pand %%xmm15, %%xmm9            ;\n"
+		"pand %%xmm15, %%xmm10           ;\n"
+		"pand %%xmm15, %%xmm11           ;\n"
+		"por %%xmm6, %%xmm0              ;\n"
+		"por %%xmm7, %%xmm1              ;\n"
+		"por %%xmm8, %%xmm2              ;\n"
+		"por %%xmm9, %%xmm3              ;\n"
+		"por %%xmm10, %%xmm4             ;\n"
+		"por %%xmm11, %%xmm5             ;\n"
+
+		/* conditionally swap ysubx and xaddy */
+		"movq %3, %%rax                  ;\n"
+		"xorq $1, %%rax                  ;\n"
+		"movd %%rax, %%xmm14             ;\n"
+		"pxor %%xmm15, %%xmm15           ;\n"
+		"pshufd $0x00, %%xmm14, %%xmm14  ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+		"pcmpeqd %%xmm14, %%xmm15        ;\n"
+		"movdqa %%xmm2, %%xmm6           ;\n"
+		"movdqa %%xmm3, %%xmm7           ;\n"
+		"pand %%xmm15, %%xmm6            ;\n"
+		"pand %%xmm15, %%xmm7            ;\n"
+		"pxor %%xmm6, %%xmm0             ;\n"
+		"pxor %%xmm7, %%xmm1             ;\n"
+		"pxor %%xmm0, %%xmm2             ;\n"
+		"pxor %%xmm1, %%xmm3             ;\n"
+
+		/* store ysubx */
+		"movq $0x7ffffffffffff, %%rax    ;\n"
+		"movd %%xmm0, %%rcx              ;\n"
+		"movd %%xmm0, %%r8               ;\n"
+		"movd %%xmm1, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm0, %%xmm0    ;\n"
+		"pshufd $0xee, %%xmm1, %%xmm1    ;\n"
+		"movd %%xmm0, %%rdx              ;\n"
+		"movd %%xmm1, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"andq %%rax, %%rcx               ;\n"
+		"andq %%rax, %%r8                ;\n"
+		"andq %%rax, %%rdx               ;\n"
+		"andq %%rax, %%rsi               ;\n"
+		"andq %%rax, %%rdi               ;\n"
+		"movq %%rcx, 0(%2)               ;\n"
+		"movq %%r8, 8(%2)                ;\n"
+		"movq %%rdx, 16(%2)              ;\n"
+		"movq %%rsi, 24(%2)              ;\n"
+		"movq %%rdi, 32(%2)              ;\n"
+
+		/* store xaddy */
+		"movq $0x7ffffffffffff, %%rax    ;\n"
+		"movd %%xmm2, %%rcx              ;\n"
+		"movd %%xmm2, %%r8               ;\n"
+		"movd %%xmm3, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm2, %%xmm2    ;\n"
+		"pshufd $0xee, %%xmm3, %%xmm3    ;\n"
+		"movd %%xmm2, %%rdx              ;\n"
+		"movd %%xmm3, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"andq %%rax, %%rcx               ;\n"
+		"andq %%rax, %%r8                ;\n"
+		"andq %%rax, %%rdx               ;\n"
+		"andq %%rax, %%rsi               ;\n"
+		"andq %%rax, %%rdi               ;\n"
+		"movq %%rcx, 40(%2)              ;\n"
+		"movq %%r8, 48(%2)               ;\n"
+		"movq %%rdx, 56(%2)              ;\n"
+		"movq %%rsi, 64(%2)              ;\n"
+		"movq %%rdi, 72(%2)              ;\n"
+
+		/* extract t2d */
+		"movq $0x7ffffffffffff, %%rax    ;\n"
+		"movd %%xmm4, %%rcx              ;\n"
+		"movd %%xmm4, %%r8               ;\n"
+		"movd %%xmm5, %%rsi              ;\n"
+		"pshufd $0xee, %%xmm4, %%xmm4    ;\n"
+		"pshufd $0xee, %%xmm5, %%xmm5    ;\n"
+		"movd %%xmm4, %%rdx              ;\n"
+		"movd %%xmm5, %%rdi              ;\n"
+		"shrdq $51, %%rdx, %%r8          ;\n"
+		"shrdq $38, %%rsi, %%rdx         ;\n"
+		"shrdq $25, %%rdi, %%rsi         ;\n"
+		"shrq $12, %%rdi                 ;\n"
+		"andq %%rax, %%rcx               ;\n"
+		"andq %%rax, %%r8                ;\n"
+		"andq %%rax, %%rdx               ;\n"
+		"andq %%rax, %%rsi               ;\n"
+		"andq %%rax, %%rdi               ;\n"
+
+		/* conditionally negate t2d */
+		"movq %3, %%rax                  ;\n"
+		"movq $0xfffffffffffda, %%r9     ;\n"
+		"movq $0xffffffffffffe, %%r10    ;\n"
+		"movq %%r10, %%r11               ;\n"
+		"movq %%r10, %%r12               ;\n"
+		"movq %%r10, %%r13               ;\n"
+		"subq %%rcx, %%r9                ;\n"
+		"subq %%r8, %%r10                ;\n"
+		"subq %%rdx, %%r11               ;\n"
+		"subq %%rsi, %%r12               ;\n"
+		"subq %%rdi, %%r13               ;\n"
+		"cmpq $1, %%rax                  ;\n"
+		"cmove %%r9, %%rcx               ;\n"
+		"cmove %%r10, %%r8               ;\n"
+		"cmove %%r11, %%rdx              ;\n"
+		"cmove %%r12, %%rsi              ;\n"
+		"cmove %%r13, %%rdi              ;\n"
+
+		/* store t2d */
+		"movq %%rcx, 80(%2)              ;\n"
+		"movq %%r8, 88(%2)               ;\n"
+		"movq %%rdx, 96(%2)              ;\n"
+		"movq %%rsi, 104(%2)             ;\n"
+		"movq %%rdi, 112(%2)             ;\n"
+		:
+		: "m"(u), "r"(&table[pos * 8]), "r"(t), "m"(sign) /* %0 = u, %1 = table, %2 = t, %3 = sign */
+		:
+			"%rax", "%rcx", "%rdx", "%rdi", "%rsi", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", 
+			"%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm14", "%xmm14",
+			"cc", "memory"
+	);
+}
+
+#endif /* defined(ED25519_GCC_64BIT_X86_CHOOSE) */
+

src/external/ed25519-donna/ed25519-donna-basepoint-table.h

@@ -0,0 +1,259 @@
+/* multiples of the base point in packed {ysubx, xaddy, t2d} form */
+static const uint8_t ALIGN(16) ge25519_niels_base_multiples[256][96] = {
+	{0x3e,0x91,0x40,0xd7,0x05,0x39,0x10,0x9d,0xb3,0xbe,0x40,0xd1,0x05,0x9f,0x39,0xfd,0x09,0x8a,0x8f,0x68,0x34,0x84,0xc1,0xa5,0x67,0x12,0xf8,0x98,0x92,0x2f,0xfd,0x44,0x85,0x3b,0x8c,0xf5,0xc6,0x93,0xbc,0x2f,0x19,0x0e,0x8c,0xfb,0xc6,0x2d,0x93,0xcf,0xc2,0x42,0x3d,0x64,0x98,0x48,0x0b,0x27,0x65,0xba,0xd4,0x33,0x3a,0x9d,0xcf,0x07,0x59,0xbb,0x6f,0x4b,0x67,0x15,0xbd,0xdb,0xea,0xa5,0xa2,0xee,0x00,0x3f,0xe1,0x41,0xfa,0xc6,0x57,0xc9,0x1c,0x9d,0xd4,0xcd,0xca,0xec,0x16,0xaf,0x1f,0xbe,0x0e,0x4f},
+	{0xa8,0xd5,0xb4,0x42,0x60,0xa5,0x99,0x8a,0xf6,0xac,0x60,0x4e,0x0c,0x81,0x2b,0x8f,0xaa,0x37,0x6e,0xb1,0x6b,0x23,0x9e,0xe0,0x55,0x25,0xc9,0x69,0xa6,0x95,0xb5,0x6b,0xd7,0x71,0x3c,0x93,0xfc,0xe7,0x24,0x92,0xb5,0xf5,0x0f,0x7a,0x96,0x9d,0x46,0x9f,0x02,0x07,0xd6,0xe1,0x65,0x9a,0xa6,0x5a,0x2e,0x2e,0x7d,0xa8,0x3f,0x06,0x0c,0x59,0x02,0x68,0xd3,0xda,0xaa,0x7e,0x34,0x6e,0x05,0x48,0xee,0x83,0x93,0x59,0xf3,0xba,0x26,0x68,0x07,0xe6,0x10,0xbe,0xca,0x3b,0xb8,0xd1,0x5e,0x16,0x0a,0x4f,0x31,0x49},
+	{0x65,0xd2,0xfc,0xa4,0xe8,0x1f,0x61,0x56,0x7d,0xba,0xc1,0xe5,0xfd,0x53,0xd3,0x3b,0xbd,0xd6,0x4b,0x21,0x1a,0xf3,0x31,0x81,0x62,0xda,0x5b,0x55,0x87,0x15,0xb9,0x2a,0x30,0x97,0xee,0x4c,0xa8,0xb0,0x25,0xaf,0x8a,0x4b,0x86,0xe8,0x30,0x84,0x5a,0x02,0x32,0x67,0x01,0x9f,0x02,0x50,0x1b,0xc1,0xf4,0xf8,0x80,0x9a,0x1b,0x4e,0x16,0x7a,0x34,0x48,0x67,0xf1,0xf4,0x11,0xf2,0x9b,0x95,0xf8,0x2d,0xf6,0x17,0x6b,0x4e,0xb8,0x4e,0x2a,0x72,0x5b,0x07,0x6f,0xde,0xd7,0x21,0x2a,0xbb,0x63,0xb9,0x04,0x9a,0x54},
+	{0xbf,0x18,0x68,0x05,0x0a,0x05,0xfe,0x95,0xa9,0xfa,0x60,0x56,0x71,0x89,0x7e,0x32,0x73,0x50,0xa0,0x06,0xcd,0xe3,0xe8,0xc3,0x9a,0xa4,0x45,0x74,0x4c,0x3f,0x93,0x27,0x9f,0x09,0xfc,0x8e,0xb9,0x51,0x73,0x28,0x38,0x25,0xfd,0x7d,0xf4,0xc6,0x65,0x67,0x65,0x92,0x0a,0xfb,0x3d,0x8d,0x34,0xca,0x27,0x87,0xe5,0x21,0x03,0x91,0x0e,0x68,0xb0,0x26,0x14,0xe5,0xec,0x45,0x1e,0xbf,0x94,0x0f,0xba,0x6d,0x3d,0xc6,0x2b,0xe3,0xc0,0x52,0xf8,0x8c,0xd5,0x74,0x29,0xe4,0x18,0x4c,0xe6,0xb0,0xb1,0x79,0xf0,0x44},
+	{0xba,0xd6,0x47,0xa4,0xc3,0x82,0x91,0x7f,0xb7,0x29,0x27,0x4b,0xd1,0x14,0x00,0xd5,0x87,0xa0,0x64,0xb8,0x1c,0xf1,0x3c,0xe3,0xf3,0x55,0x1b,0xeb,0x73,0x7e,0x4a,0x15,0x33,0xbb,0xa5,0x08,0x44,0xbc,0x12,0xa2,0x02,0xed,0x5e,0xc7,0xc3,0x48,0x50,0x8d,0x44,0xec,0xbf,0x5a,0x0c,0xeb,0x1b,0xdd,0xeb,0x06,0xe2,0x46,0xf1,0xcc,0x45,0x29,0xb3,0x03,0xd0,0xe7,0x79,0xa1,0x32,0xc8,0x7e,0x4d,0x12,0x00,0x0a,0x9d,0x72,0x5f,0xf3,0x8f,0x6d,0x0e,0xa1,0xd4,0xc1,0x62,0x98,0x7a,0xb2,0x38,0x59,0xac,0xb8,0x68},
+	{0xa4,0x8c,0x7d,0x7b,0xb6,0x06,0x98,0x49,0x39,0x27,0xd2,0x27,0x84,0xe2,0x5b,0x57,0xb9,0x53,0x45,0x20,0xe7,0x5c,0x08,0xbb,0x84,0x78,0x41,0xae,0x41,0x4c,0xb6,0x38,0x31,0x71,0x15,0x77,0xeb,0xee,0x0c,0x3a,0x88,0xaf,0xc8,0x00,0x89,0x15,0x27,0x9b,0x36,0xa7,0x59,0xda,0x68,0xb6,0x65,0x80,0xbd,0x38,0xcc,0xa2,0xb6,0x7b,0xe5,0x51,0xa4,0xe3,0x9d,0x68,0x91,0xad,0x9d,0x8f,0x37,0x91,0xfb,0xf8,0x28,0x24,0x5f,0x17,0x88,0xb9,0xcf,0x9f,0x32,0xb5,0x0a,0x05,0x9f,0xc0,0x54,0x13,0xa2,0xdf,0x65,0x78},
+	{0xb1,0x21,0x32,0xaa,0x9a,0x2c,0x6f,0xba,0xa7,0x23,0xba,0x3b,0x53,0x21,0xa0,0x6c,0x3a,0x2c,0x19,0x92,0x4f,0x76,0xea,0x9d,0xe0,0x17,0x53,0x2e,0x5d,0xdd,0x6e,0x1d,0xbf,0xa3,0x4e,0x94,0xd0,0x5c,0x1a,0x6b,0xd2,0xc0,0x9d,0xb3,0x3a,0x35,0x70,0x74,0x49,0x2e,0x54,0x28,0x82,0x52,0xb2,0x71,0x7e,0x92,0x3c,0x28,0x69,0xea,0x1b,0x46,0x36,0xda,0x0f,0xab,0xac,0x8a,0x7a,0x21,0xc8,0x49,0x35,0x3d,0x54,0xc6,0x28,0xa5,0x68,0x75,0xab,0x13,0x8b,0x5b,0xd0,0x37,0x37,0xbc,0x2c,0x3a,0x62,0xef,0x3c,0x23},
+	{0xd9,0x34,0x92,0xf3,0xed,0x5d,0xa7,0xe2,0xf9,0x58,0xb5,0xe1,0x80,0x76,0x3d,0x96,0xfb,0x23,0x3c,0x6e,0xac,0x41,0x27,0x2c,0xc3,0x01,0x0e,0x32,0xa1,0x24,0x90,0x3a,0x8f,0x3e,0xdd,0x04,0x66,0x59,0xb7,0x59,0x2c,0x70,0x88,0xe2,0x77,0x03,0xb3,0x6c,0x23,0xc3,0xd9,0x5e,0x66,0x9c,0x33,0xb1,0x2f,0xe5,0xbc,0x61,0x60,0xe7,0x15,0x09,0x7e,0xa3,0x34,0xa8,0x35,0xe8,0x7d,0xdf,0xea,0x57,0x98,0x68,0xda,0x9c,0xe1,0x8b,0x26,0xb3,0x67,0x71,0x36,0x85,0x11,0x2c,0xc2,0xd5,0xef,0xdb,0xd9,0xb3,0x9e,0x58},
+	{0x5e,0x51,0xaa,0x49,0x54,0x63,0x5b,0xed,0x3a,0x82,0xc6,0x0b,0x9f,0xc4,0x65,0xa8,0xc4,0xd1,0x42,0x5b,0xe9,0x1f,0x0c,0x85,0xb9,0x15,0xd3,0x03,0x6f,0x6d,0xd7,0x30,0x1d,0x9c,0x2f,0x63,0x0e,0xdd,0xcc,0x2e,0x15,0x31,0x89,0x76,0x96,0xb6,0xd0,0x51,0x58,0x7a,0x63,0xa8,0x6b,0xb7,0xdf,0x52,0x39,0xef,0x0e,0xa0,0x49,0x7d,0xd3,0x6d,0xc7,0xe4,0x06,0x21,0x17,0x44,0x44,0x6c,0x69,0x7f,0x8d,0x92,0x80,0xd6,0x53,0xfb,0x26,0x3f,0x4d,0x69,0xa4,0x9e,0x73,0xb4,0xb0,0x4b,0x86,0x2e,0x11,0x97,0xc6,0x10},
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+	{0x33,0x25,0x1f,0x88,0xdc,0x99,0x34,0x28,0xb6,0x23,0x93,0x77,0xda,0x25,0x05,0x9d,0xf4,0x41,0x34,0x67,0xfb,0xdd,0x7a,0x89,0x8d,0x16,0x3a,0x16,0x71,0x9d,0xb7,0x32,0x4b,0x2c,0xcc,0x89,0xd2,0x14,0x73,0xe2,0x8d,0x17,0x87,0xa2,0x11,0xbd,0xe4,0x4b,0xce,0x64,0x33,0xfa,0xd6,0x28,0xd5,0x18,0x6e,0x82,0xd9,0xaf,0xd5,0xc1,0x23,0x64,0x6a,0xb3,0xfc,0xed,0xd9,0xf8,0x85,0xcc,0xf9,0xe5,0x46,0x37,0x8f,0xc2,0xbc,0x22,0xcd,0xd3,0xe5,0xf9,0x38,0xe3,0x9d,0xe4,0xcc,0x2d,0x3e,0xc1,0xfb,0x5e,0x0a,0x48},
+	{0x71,0x20,0x62,0x01,0x0b,0xe7,0x51,0x0b,0xc5,0xaf,0x1d,0x8b,0xcf,0x05,0xb5,0x06,0xcd,0xab,0x5a,0xef,0x61,0xb0,0x6b,0x2c,0x31,0xbf,0xb7,0x0c,0x60,0x27,0xaa,0x47,0x1f,0x22,0xce,0x42,0xe4,0x4c,0x61,0xb6,0x28,0x39,0x05,0x4c,0xcc,0x9d,0x19,0x6e,0x03,0xbe,0x1c,0xdc,0xa4,0xb4,0x3f,0x66,0x06,0x8e,0x1c,0x69,0x47,0x1d,0xb3,0x24,0xc3,0xf8,0x15,0xc0,0xed,0x1e,0x54,0x2a,0x7c,0x3f,0x69,0x7c,0x7e,0xfe,0xa4,0x11,0xd6,0x78,0xa2,0x4e,0x13,0x66,0xaf,0xf0,0x94,0xa0,0xdd,0x14,0x5d,0x58,0x5b,0x54},
+	{0x0f,0x3a,0xd4,0xa0,0x5e,0x27,0xbf,0x67,0xbe,0xee,0x9b,0x08,0x34,0x8e,0xe6,0xad,0x2e,0xe7,0x79,0xd4,0x4c,0x13,0x89,0x42,0x54,0x54,0xba,0x32,0xc3,0xf9,0x62,0x0f,0xe1,0x21,0xb3,0xe3,0xd0,0xe4,0x04,0x62,0x95,0x1e,0xff,0x28,0x7a,0x63,0xaa,0x3b,0x9e,0xbd,0x99,0x5b,0xfd,0xcf,0x0c,0x0b,0x71,0xd0,0xc8,0x64,0x3e,0xdc,0x22,0x4d,0x39,0x5f,0x3b,0xd6,0x89,0x65,0xb4,0xfc,0x61,0xcf,0xcb,0x57,0x3f,0x6a,0xae,0x5c,0x05,0xfa,0x3a,0x95,0xd2,0xc2,0xba,0xfe,0x36,0x14,0x37,0x36,0x1a,0xa0,0x0f,0x1c},
+	{0xff,0x3d,0x94,0x22,0xb6,0x04,0xc6,0xd2,0xa0,0xb3,0xcf,0x44,0xce,0xbe,0x8c,0xbc,0x78,0x86,0x80,0x97,0xf3,0x4f,0x25,0x5d,0xbf,0xa6,0x1c,0x3b,0x4f,0x61,0xa3,0x0f,0x50,0x6a,0x93,0x8c,0x0e,0x2b,0x08,0x69,0xb6,0xc5,0xda,0xc1,0x35,0xa0,0xc9,0xf9,0x34,0xb6,0xdf,0xc4,0x54,0x3e,0xb7,0x6f,0x40,0xc1,0x2b,0x1d,0x9b,0x41,0x05,0x40,0xf0,0x82,0xbe,0xb9,0xbd,0xfe,0x03,0xa0,0x90,0xac,0x44,0x3a,0xaf,0xc1,0x89,0x20,0x8e,0xfa,0x54,0x19,0x91,0x9f,0x49,0xf8,0x42,0xab,0x40,0xef,0x8a,0x21,0xba,0x1f},
+	{0x3e,0xf5,0xc8,0xfa,0x48,0x94,0x54,0xab,0x41,0x37,0xa6,0x7b,0x9a,0xe8,0xf6,0x81,0x01,0x5e,0x2b,0x6c,0x7d,0x6c,0xfd,0x74,0x42,0x6e,0xc8,0xa8,0xca,0x3a,0x2e,0x39,0x94,0x01,0x7b,0x3e,0x04,0x57,0x3e,0x4f,0x7f,0xaf,0xda,0x08,0xee,0x3e,0x1d,0xa8,0xf1,0xde,0xdc,0x99,0xab,0xc6,0x39,0xc8,0xd5,0x61,0x77,0xff,0x13,0x5d,0x53,0x6c,0xaf,0x35,0x8a,0x3e,0xe9,0x34,0xbd,0x4c,0x16,0xe8,0x87,0x58,0x44,0x81,0x07,0x2e,0xab,0xb0,0x9a,0xf2,0x76,0x9c,0x31,0x19,0x3b,0xc1,0x0a,0xd5,0xe4,0x7f,0xe1,0x25},
+	{0x76,0xf6,0x04,0x1e,0xd7,0x9b,0x28,0x0a,0x95,0x0f,0x42,0xd6,0x52,0x1c,0x8e,0x20,0xab,0x1f,0x69,0x34,0xb0,0xd8,0x86,0x51,0x51,0xb3,0x9f,0x2a,0x44,0x51,0x57,0x25,0xa7,0x21,0xf1,0x76,0xf5,0x7f,0x5f,0x91,0xe3,0x87,0xcd,0x2f,0x27,0x32,0x4a,0xc3,0x26,0xe5,0x1b,0x4d,0xde,0x2f,0xba,0xcc,0x9b,0x89,0x69,0x89,0x8f,0x82,0xba,0x6b,0x01,0x39,0xfe,0x90,0x66,0xbc,0xd1,0xe2,0xd5,0x7a,0x99,0xa0,0x18,0x4a,0xb5,0x4c,0xd4,0x60,0x84,0xaf,0x14,0x69,0x1d,0x97,0xe4,0x7b,0x6b,0x7f,0x4f,0x50,0x9d,0x55},
+	{0xd5,0x54,0xeb,0xb3,0x78,0x83,0x73,0xa7,0x7c,0x3c,0x55,0xa5,0x66,0xd3,0x69,0x1d,0xba,0x00,0x28,0xf9,0x62,0xcf,0x26,0x0a,0x17,0x32,0x7e,0x80,0xd5,0x12,0xab,0x01,0xfd,0x66,0xd2,0xf6,0xe7,0x91,0x48,0x9c,0x1b,0x78,0x07,0x03,0x9b,0xa1,0x44,0x07,0x3b,0xe2,0x61,0x60,0x1d,0x8f,0x38,0x88,0x0e,0xd5,0x4b,0x35,0xa3,0xa6,0x3e,0x12,0x96,0x2d,0xe3,0x41,0x90,0x18,0x8d,0x11,0x48,0x58,0x31,0xd8,0xc2,0xe3,0xed,0xb9,0xd9,0x45,0x32,0xd8,0x71,0x42,0xab,0x1e,0x54,0xa1,0x18,0xc9,0xe2,0x61,0x39,0x4a},
+	{0xa0,0xbb,0xe6,0xf8,0xe0,0x3b,0xdc,0x71,0x0a,0xe3,0xff,0x7e,0x34,0xf8,0xce,0xd6,0x6a,0x47,0x3a,0xe1,0x5f,0x42,0x92,0xa9,0x63,0xb7,0x1d,0xfb,0xe3,0xbc,0xd6,0x2c,0x1e,0x3f,0x23,0xf3,0x44,0xd6,0x27,0x03,0x16,0xf0,0xfc,0x34,0x0e,0x26,0x9a,0x49,0x79,0xb9,0xda,0xf2,0x16,0xa7,0xb5,0x83,0x1f,0x11,0xd4,0x9b,0xad,0xee,0xac,0x68,0x10,0xc2,0xd7,0xf3,0x0e,0xc9,0xb4,0x38,0x0c,0x04,0xad,0xb7,0x24,0x6e,0x8e,0x30,0x23,0x3e,0xe7,0xb7,0xf1,0xd9,0x60,0x38,0x97,0xf5,0x08,0xb5,0xd5,0x60,0x57,0x59},
+	{0x97,0x63,0xaa,0x04,0xe1,0xbf,0x29,0x61,0xcb,0xfc,0xa7,0xa4,0x08,0x00,0x96,0x8f,0x58,0x94,0x90,0x7d,0x89,0xc0,0x8b,0x3f,0xa9,0x91,0xb2,0xdc,0x3e,0xa4,0x9f,0x70,0x90,0x27,0x02,0xfd,0xeb,0xcb,0x2a,0x88,0x60,0x57,0x11,0xc4,0x05,0x33,0xaf,0x89,0xf4,0x73,0x34,0x7d,0xe3,0x92,0xf4,0x65,0x2b,0x5a,0x51,0x54,0xdf,0xc5,0xb2,0x2c,0xca,0x2a,0xfd,0x63,0x8c,0x5d,0x0a,0xeb,0xff,0x4e,0x69,0x2e,0x66,0xc1,0x2b,0xd2,0x3a,0xb0,0xcb,0xf8,0x6e,0xf3,0x23,0x27,0x1f,0x13,0xc8,0xf0,0xec,0x29,0xf0,0x70},
+	{0x33,0x3e,0xed,0x2e,0xb3,0x07,0x13,0x46,0xe7,0x81,0x55,0xa4,0x33,0x2f,0x04,0xae,0x66,0x03,0x5f,0x19,0xd3,0x49,0x44,0xc9,0x58,0x48,0x31,0x6c,0x8a,0x5d,0x7d,0x0b,0xb9,0xb0,0x10,0x5e,0xaa,0xaf,0x6a,0x2a,0xa9,0x1a,0x04,0xef,0x70,0xa3,0xf0,0x78,0x1f,0xd6,0x3a,0xaa,0x77,0xfb,0x3e,0x77,0xe1,0xd9,0x4b,0xa7,0xa2,0xa5,0xec,0x44,0x43,0xd5,0x95,0x7b,0x32,0x48,0xd4,0x25,0x1d,0x0f,0x34,0xa3,0x00,0x83,0xd3,0x70,0x2b,0xc5,0xe1,0x60,0x1c,0x53,0x1c,0xde,0xe4,0xe9,0x7d,0x2c,0x51,0x24,0x22,0x27},
+	{0x2e,0x34,0xc5,0x49,0xaf,0x92,0xbc,0x1a,0xd0,0xfa,0xe6,0xb2,0x11,0xd8,0xee,0xff,0x29,0x4e,0xc8,0xfc,0x8d,0x8c,0xa2,0xef,0x43,0xc5,0x4c,0xa4,0x18,0xdf,0xb5,0x11,0xfc,0x75,0xa9,0x42,0x8a,0xbb,0x7b,0xbf,0x58,0xa3,0xad,0x96,0x77,0x39,0x5c,0x8c,0x48,0xaa,0xed,0xcd,0x6f,0xc7,0x7f,0xe2,0xa6,0x20,0xbc,0xf6,0xd7,0x5f,0x73,0x19,0x66,0x42,0xc8,0x42,0xd0,0x90,0xab,0xe3,0x7e,0x54,0x19,0x7f,0x0f,0x8e,0x84,0xeb,0xb9,0x97,0xa4,0x65,0xd0,0xa1,0x03,0x25,0x5f,0x89,0xdf,0x91,0x11,0x91,0xef,0x0f}
+};

src/external/ed25519-donna/ed25519-donna-batchverify.h

@@ -0,0 +1,275 @@
+/*
+	Ed25519 batch verification
+*/
+
+#define max_batch_size 64
+#define heap_batch_size ((max_batch_size * 2) + 1)
+
+/* which limb is the 128th bit in? */
+static const size_t limb128bits = (128 + bignum256modm_bits_per_limb - 1) / bignum256modm_bits_per_limb;
+
+typedef size_t heap_index_t;
+
+typedef struct batch_heap_t {
+	unsigned char r[heap_batch_size][16]; /* 128 bit random values */
+	ge25519 points[heap_batch_size];
+	bignum256modm scalars[heap_batch_size];
+	heap_index_t heap[heap_batch_size];
+	size_t size;
+} batch_heap;
+
+/* swap two values in the heap */
+static void
+heap_swap(heap_index_t *heap, size_t a, size_t b) {
+	heap_index_t temp;
+	temp = heap[a];
+	heap[a] = heap[b];
+	heap[b] = temp;
+}
+
+/* add the scalar at the end of the list to the heap */
+static void
+heap_insert_next(batch_heap *heap) {
+	size_t node = heap->size, parent;
+	heap_index_t *pheap = heap->heap;
+	bignum256modm *scalars = heap->scalars;
+
+	/* insert at the bottom */
+	pheap[node] = (heap_index_t)node;
+
+	/* sift node up to its sorted spot */
+	parent = (node - 1) / 2;
+	while (node && lt256_modm_batch(scalars[pheap[parent]], scalars[pheap[node]], bignum256modm_limb_size - 1)) {
+		heap_swap(pheap, parent, node);
+		node = parent;
+		parent = (node - 1) / 2;
+	}
+	heap->size++;
+}
+
+/* update the heap when the root element is updated */
+static void
+heap_updated_root(batch_heap *heap, size_t limbsize) {
+	size_t node, parent, childr, childl;
+	heap_index_t *pheap = heap->heap;
+	bignum256modm *scalars = heap->scalars;
+
+	/* sift root to the bottom */
+	parent = 0;
+	node = 1;
+	childl = 1;
+	childr = 2;
+	while ((childr < heap->size)) {
+		node = lt256_modm_batch(scalars[pheap[childl]], scalars[pheap[childr]], limbsize) ? childr : childl;
+		heap_swap(pheap, parent, node);
+		parent = node;
+		childl = (parent * 2) + 1;
+		childr = childl + 1;
+	}
+
+	/* sift root back up to its sorted spot */
+	parent = (node - 1) / 2;
+	while (node && lte256_modm_batch(scalars[pheap[parent]], scalars[pheap[node]], limbsize)) {
+		heap_swap(pheap, parent, node);
+		node = parent;
+		parent = (node - 1) / 2;
+	}
+}
+
+/* build the heap with count elements, count must be >= 3 */
+static void
+heap_build(batch_heap *heap, size_t count) {
+	heap->heap[0] = 0;
+	heap->size = 0;
+	while (heap->size < count)
+		heap_insert_next(heap);
+}
+
+/* extend the heap to contain new_count elements */
+static void
+heap_extend(batch_heap *heap, size_t new_count) {
+	while (heap->size < new_count)
+		heap_insert_next(heap);
+}
+
+/* get the top 2 elements of the heap */
+static void
+heap_get_top2(batch_heap *heap, heap_index_t *max1, heap_index_t *max2, size_t limbsize) {
+	heap_index_t h0 = heap->heap[0], h1 = heap->heap[1], h2 = heap->heap[2];
+	if (lt256_modm_batch(heap->scalars[h1], heap->scalars[h2], limbsize))
+		h1 = h2;
+	*max1 = h0;
+	*max2 = h1;
+}
+
+/* */
+static void
+ge25519_multi_scalarmult_vartime_final(ge25519 *r, ge25519 *point, bignum256modm scalar) {
+	const bignum256modm_element_t topbit = ((bignum256modm_element_t)1 << (bignum256modm_bits_per_limb - 1));
+	size_t limb = limb128bits;
+	bignum256modm_element_t flag;
+
+	if (isone256_modm_batch(scalar)) {
+		/* this will happen most of the time after bos-carter */
+		*r = *point;
+		return;
+	} else if (iszero256_modm_batch(scalar)) {
+		/* this will only happen if all scalars == 0 */
+		memset(r, 0, sizeof(*r));
+		r->y[0] = 1;
+		r->z[0] = 1;
+		return;
+	}
+
+	*r = *point;
+
+	/* find the limb where first bit is set */
+	while (!scalar[limb])
+		limb--;
+
+	/* find the first bit */
+	flag = topbit;
+	while ((scalar[limb] & flag) == 0)
+		flag >>= 1;
+
+	/* exponentiate */
+	for (;;) {
+		ge25519_double(r, r);
+		if (scalar[limb] & flag)
+			ge25519_add(r, r, point);
+
+		flag >>= 1;
+		if (!flag) {
+			if (!limb--)
+				break;
+			flag = topbit;
+		}
+	}
+}
+
+/* count must be >= 5 */
+static void
+ge25519_multi_scalarmult_vartime(ge25519 *r, batch_heap *heap, size_t count) {
+	heap_index_t max1, max2;
+
+	/* start with the full limb size */
+	size_t limbsize = bignum256modm_limb_size - 1;
+
+	/* whether the heap has been extended to include the 128 bit scalars */
+	int extended = 0;
+
+	/* grab an odd number of scalars to build the heap, unknown limb sizes */
+	heap_build(heap, ((count + 1) / 2) | 1);
+
+	for (;;) {
+		heap_get_top2(heap, &max1, &max2, limbsize);
+
+		/* only one scalar remaining, we're done */
+		if (iszero256_modm_batch(heap->scalars[max2]))
+			break;
+
+		/* exhausted another limb? */
+		if (!heap->scalars[max1][limbsize])
+			limbsize -= 1;
+
+		/* can we extend to the 128 bit scalars? */
+		if (!extended && isatmost128bits256_modm_batch(heap->scalars[max1])) {
+			heap_extend(heap, count);
+			heap_get_top2(heap, &max1, &max2, limbsize);
+			extended = 1;
+		}
+
+		sub256_modm_batch(heap->scalars[max1], heap->scalars[max1], heap->scalars[max2], limbsize);
+		ge25519_add(&heap->points[max2], &heap->points[max2], &heap->points[max1]);
+		heap_updated_root(heap, limbsize);
+	}
+
+	ge25519_multi_scalarmult_vartime_final(r, &heap->points[max1], heap->scalars[max1]);
+}
+
+/* not actually used for anything other than testing */
+unsigned char batch_point_buffer[3][32];
+
+static int
+ge25519_is_neutral_vartime(const ge25519 *p) {
+	static const unsigned char zero[32] = {0};
+	unsigned char point_buffer[3][32];
+	curve25519_contract(point_buffer[0], p->x);
+	curve25519_contract(point_buffer[1], p->y);
+	curve25519_contract(point_buffer[2], p->z);
+	memcpy(batch_point_buffer[1], point_buffer[1], 32);
+	return (memcmp(point_buffer[0], zero, 32) == 0) && (memcmp(point_buffer[1], point_buffer[2], 32) == 0);
+}
+
+int
+ED25519_FN(ed25519_sign_open_batch) (const unsigned char **m, size_t *mlen, const unsigned char **pk, const unsigned char **RS, size_t num, int *valid) {
+	batch_heap ALIGN(16) batch;
+	ge25519 ALIGN(16) p;
+	bignum256modm *r_scalars;
+	size_t i, batchsize;
+	unsigned char hram[64];
+	int ret = 0;
+
+	for (i = 0; i < num; i++)
+		valid[i] = 1;
+
+	while (num > 3) {
+		batchsize = (num > max_batch_size) ? max_batch_size : num;
+
+		/* generate r (scalars[batchsize+1]..scalars[2*batchsize] */
+		ED25519_FN(ed25519_randombytes_unsafe) (batch.r, batchsize * 16);
+		r_scalars = &batch.scalars[batchsize + 1];
+		for (i = 0; i < batchsize; i++)
+			expand256_modm(r_scalars[i], batch.r[i], 16);
+
+		/* compute scalars[0] = ((r1s1 + r2s2 + ...)) */
+		for (i = 0; i < batchsize; i++) {
+			expand256_modm(batch.scalars[i], RS[i] + 32, 32);
+			mul256_modm(batch.scalars[i], batch.scalars[i], r_scalars[i]);
+		}
+		for (i = 1; i < batchsize; i++)
+			add256_modm(batch.scalars[0], batch.scalars[0], batch.scalars[i]);
+
+		/* compute scalars[1]..scalars[batchsize] as r[i]*H(R[i],A[i],m[i]) */
+		for (i = 0; i < batchsize; i++) {
+			ed25519_hram(hram, RS[i], pk[i], m[i], mlen[i]);
+			expand256_modm(batch.scalars[i+1], hram, 64);
+			mul256_modm(batch.scalars[i+1], batch.scalars[i+1], r_scalars[i]);
+		}
+
+		/* compute points */
+		batch.points[0] = ge25519_basepoint;
+		for (i = 0; i < batchsize; i++)
+			if (!ge25519_unpack_negative_vartime(&batch.points[i+1], pk[i]))
+				goto fallback;
+		for (i = 0; i < batchsize; i++)
+			if (!ge25519_unpack_negative_vartime(&batch.points[batchsize+i+1], RS[i]))
+				goto fallback;
+
+		ge25519_multi_scalarmult_vartime(&p, &batch, (batchsize * 2) + 1);
+		if (!ge25519_is_neutral_vartime(&p)) {
+			ret |= 2;
+
+			fallback:
+			for (i = 0; i < batchsize; i++) {
+				valid[i] = ED25519_FN(ed25519_sign_open) (m[i], mlen[i], pk[i], RS[i]) ? 0 : 1;
+				ret |= (valid[i] ^ 1);
+			}
+		}
+
+		m += batchsize;
+		mlen += batchsize;
+		pk += batchsize;
+		RS += batchsize;
+		num -= batchsize;
+		valid += batchsize;
+	}
+
+	for (i = 0; i < num; i++) {
+		valid[i] = ED25519_FN(ed25519_sign_open) (m[i], mlen[i], pk[i], RS[i]) ? 0 : 1;
+		ret |= (valid[i] ^ 1);
+	}
+
+	return ret;
+}
+

src/external/ed25519-donna/ed25519-donna-impl-base.h

@@ -0,0 +1,364 @@
+/*
+	conversions
+*/
+
+DONNA_INLINE static void
+ge25519_p1p1_to_partial(ge25519 *r, const ge25519_p1p1 *p) {
+	curve25519_mul(r->x, p->x, p->t);
+	curve25519_mul(r->y, p->y, p->z);
+	curve25519_mul(r->z, p->z, p->t); 
+}
+
+DONNA_INLINE static void
+ge25519_p1p1_to_full(ge25519 *r, const ge25519_p1p1 *p) {
+	curve25519_mul(r->x, p->x, p->t);
+	curve25519_mul(r->y, p->y, p->z);
+	curve25519_mul(r->z, p->z, p->t); 
+	curve25519_mul(r->t, p->x, p->y); 
+}
+
+static void
+ge25519_full_to_pniels(ge25519_pniels *p, const ge25519 *r) {
+	curve25519_sub(p->ysubx, r->y, r->x);
+	curve25519_add(p->xaddy, r->y, r->x);
+	curve25519_copy(p->z, r->z);
+	curve25519_mul(p->t2d, r->t, ge25519_ec2d);
+}
+
+/*
+	adding & doubling
+*/
+
+static void
+ge25519_add_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519 *q) {
+	bignum25519 a,b,c,d,t,u;
+
+	curve25519_sub(a, p->y, p->x);
+	curve25519_add(b, p->y, p->x);
+	curve25519_sub(t, q->y, q->x);
+	curve25519_add(u, q->y, q->x);
+	curve25519_mul(a, a, t);
+	curve25519_mul(b, b, u);
+	curve25519_mul(c, p->t, q->t);
+	curve25519_mul(c, c, ge25519_ec2d);
+	curve25519_mul(d, p->z, q->z);
+	curve25519_add(d, d, d);
+	curve25519_sub(r->x, b, a);
+	curve25519_add(r->y, b, a);
+	curve25519_add_after_basic(r->z, d, c);
+	curve25519_sub_after_basic(r->t, d, c);
+}
+
+
+static void
+ge25519_double_p1p1(ge25519_p1p1 *r, const ge25519 *p) {
+	bignum25519 a,b,c;
+
+	curve25519_square(a, p->x);
+	curve25519_square(b, p->y);
+	curve25519_square(c, p->z);
+	curve25519_add_reduce(c, c, c);
+	curve25519_add(r->x, p->x, p->y);
+	curve25519_square(r->x, r->x);
+	curve25519_add(r->y, b, a);
+	curve25519_sub(r->z, b, a);
+	curve25519_sub_after_basic(r->x, r->x, r->y);
+	curve25519_sub_after_basic(r->t, c, r->z);
+}
+
+static void
+ge25519_nielsadd2_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519_niels *q, unsigned char signbit) {
+	const bignum25519 *qb = (const bignum25519 *)q;
+	bignum25519 *rb = (bignum25519 *)r;
+	bignum25519 a,b,c;
+
+	curve25519_sub(a, p->y, p->x);
+	curve25519_add(b, p->y, p->x);
+	curve25519_mul(a, a, qb[signbit]); /* x for +, y for - */
+	curve25519_mul(r->x, b, qb[signbit^1]); /* y for +, x for - */
+	curve25519_add(r->y, r->x, a);
+	curve25519_sub(r->x, r->x, a);
+	curve25519_mul(c, p->t, q->t2d);
+	curve25519_add_reduce(r->t, p->z, p->z);
+	curve25519_copy(r->z, r->t);
+	curve25519_add(rb[2+signbit], rb[2+signbit], c); /* z for +, t for - */
+	curve25519_sub(rb[2+(signbit^1)], rb[2+(signbit^1)], c); /* t for +, z for - */
+}
+
+static void
+ge25519_pnielsadd_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519_pniels *q, unsigned char signbit) {
+	const bignum25519 *qb = (const bignum25519 *)q;
+	bignum25519 *rb = (bignum25519 *)r;
+	bignum25519 a,b,c;
+
+	curve25519_sub(a, p->y, p->x);
+	curve25519_add(b, p->y, p->x);
+	curve25519_mul(a, a, qb[signbit]); /* ysubx for +, xaddy for - */
+	curve25519_mul(r->x, b, qb[signbit^1]); /* xaddy for +, ysubx for - */
+	curve25519_add(r->y, r->x, a);
+	curve25519_sub(r->x, r->x, a);
+	curve25519_mul(c, p->t, q->t2d);
+	curve25519_mul(r->t, p->z, q->z);
+	curve25519_add_reduce(r->t, r->t, r->t);
+	curve25519_copy(r->z, r->t);
+	curve25519_add(rb[2+signbit], rb[2+signbit], c); /* z for +, t for - */
+	curve25519_sub(rb[2+(signbit^1)], rb[2+(signbit^1)], c); /* t for +, z for - */
+}
+
+static void
+ge25519_double_partial(ge25519 *r, const ge25519 *p) {
+	ge25519_p1p1 t;
+	ge25519_double_p1p1(&t, p);
+	ge25519_p1p1_to_partial(r, &t);
+}
+
+static void
+ge25519_double(ge25519 *r, const ge25519 *p) {
+	ge25519_p1p1 t;
+	ge25519_double_p1p1(&t, p);
+	ge25519_p1p1_to_full(r, &t);
+}
+
+static void
+ge25519_add(ge25519 *r, const ge25519 *p,  const ge25519 *q) {
+	ge25519_p1p1 t;
+	ge25519_add_p1p1(&t, p, q);
+	ge25519_p1p1_to_full(r, &t);
+}
+
+static void
+ge25519_nielsadd2(ge25519 *r, const ge25519_niels *q) {
+	bignum25519 a,b,c,e,f,g,h;
+
+	curve25519_sub(a, r->y, r->x);
+	curve25519_add(b, r->y, r->x);
+	curve25519_mul(a, a, q->ysubx);
+	curve25519_mul(e, b, q->xaddy);
+	curve25519_add(h, e, a);
+	curve25519_sub(e, e, a);
+	curve25519_mul(c, r->t, q->t2d);
+	curve25519_add(f, r->z, r->z);
+	curve25519_add_after_basic(g, f, c);
+	curve25519_sub_after_basic(f, f, c);
+	curve25519_mul(r->x, e, f);
+	curve25519_mul(r->y, h, g);
+	curve25519_mul(r->z, g, f);
+	curve25519_mul(r->t, e, h);
+}
+
+static void
+ge25519_pnielsadd(ge25519_pniels *r, const ge25519 *p, const ge25519_pniels *q) {
+	bignum25519 a,b,c,x,y,z,t;
+
+	curve25519_sub(a, p->y, p->x);
+	curve25519_add(b, p->y, p->x);
+	curve25519_mul(a, a, q->ysubx);
+	curve25519_mul(x, b, q->xaddy);
+	curve25519_add(y, x, a);
+	curve25519_sub(x, x, a);
+	curve25519_mul(c, p->t, q->t2d);
+	curve25519_mul(t, p->z, q->z);
+	curve25519_add(t, t, t);
+	curve25519_add_after_basic(z, t, c);
+	curve25519_sub_after_basic(t, t, c);
+	curve25519_mul(r->xaddy, x, t);
+	curve25519_mul(r->ysubx, y, z);
+	curve25519_mul(r->z, z, t);
+	curve25519_mul(r->t2d, x, y);
+	curve25519_copy(y, r->ysubx);
+	curve25519_sub(r->ysubx, r->ysubx, r->xaddy);
+	curve25519_add(r->xaddy, r->xaddy, y);
+	curve25519_mul(r->t2d, r->t2d, ge25519_ec2d);
+}
+
+
+/*
+	pack & unpack
+*/
+
+static void
+ge25519_pack(unsigned char r[32], const ge25519 *p) {
+	bignum25519 tx, ty, zi;
+	unsigned char parity[32];
+	curve25519_recip(zi, p->z);
+	curve25519_mul(tx, p->x, zi);
+	curve25519_mul(ty, p->y, zi);
+	curve25519_contract(r, ty);
+	curve25519_contract(parity, tx);
+	r[31] ^= ((parity[0] & 1) << 7);
+}
+
+static int
+ge25519_unpack_negative_vartime(ge25519 *r, const unsigned char p[32]) {
+	static const unsigned char zero[32] = {0};
+	static const bignum25519 one = {1};
+	unsigned char parity = p[31] >> 7;
+	unsigned char check[32];
+	bignum25519 t, root, num, den, d3;
+
+	curve25519_expand(r->y, p);
+	curve25519_copy(r->z, one);
+	curve25519_square(num, r->y); /* x = y^2 */
+	curve25519_mul(den, num, ge25519_ecd); /* den = dy^2 */
+	curve25519_sub_reduce(num, num, r->z); /* x = y^1 - 1 */
+	curve25519_add(den, den, r->z); /* den = dy^2 + 1 */
+
+	/* Computation of sqrt(num/den) */
+	/* 1.: computation of num^((p-5)/8)*den^((7p-35)/8) = (num*den^7)^((p-5)/8) */
+	curve25519_square(t, den);
+	curve25519_mul(d3, t, den);
+	curve25519_square(r->x, d3);
+	curve25519_mul(r->x, r->x, den);
+	curve25519_mul(r->x, r->x, num);
+	curve25519_pow_two252m3(r->x, r->x);
+
+	/* 2. computation of r->x = num * den^3 * (num*den^7)^((p-5)/8) */
+	curve25519_mul(r->x, r->x, d3);
+	curve25519_mul(r->x, r->x, num);
+
+	/* 3. Check if either of the roots works: */
+	curve25519_square(t, r->x);
+	curve25519_mul(t, t, den);
+	curve25519_sub_reduce(root, t, num);
+	curve25519_contract(check, root);
+	if (!ed25519_verify(check, zero, 32)) {
+		curve25519_add_reduce(t, t, num);
+		curve25519_contract(check, t);
+		if (!ed25519_verify(check, zero, 32))
+			return 0;
+		curve25519_mul(r->x, r->x, ge25519_sqrtneg1);
+	}
+
+	curve25519_contract(check, r->x);
+	if ((check[0] & 1) == parity) {
+		curve25519_copy(t, r->x);
+		curve25519_neg(r->x, t);
+	}
+	curve25519_mul(r->t, r->x, r->y);
+	return 1;
+}
+
+
+/*
+	scalarmults
+*/
+
+#define S1_SWINDOWSIZE 5
+#define S1_TABLE_SIZE (1<<(S1_SWINDOWSIZE-2))
+#define S2_SWINDOWSIZE 7
+#define S2_TABLE_SIZE (1<<(S2_SWINDOWSIZE-2))
+
+/* computes [s1]p1 + [s2]basepoint */
+static void 
+ge25519_double_scalarmult_vartime(ge25519 *r, const ge25519 *p1, const bignum256modm s1, const bignum256modm s2) {
+	signed char slide1[256], slide2[256];
+	ge25519_pniels pre1[S1_TABLE_SIZE];
+	ge25519 d1;
+	ge25519_p1p1 t;
+	int32_t i;
+
+	contract256_slidingwindow_modm(slide1, s1, S1_SWINDOWSIZE);
+	contract256_slidingwindow_modm(slide2, s2, S2_SWINDOWSIZE);
+
+	ge25519_double(&d1, p1);
+	ge25519_full_to_pniels(pre1, p1);
+	for (i = 0; i < S1_TABLE_SIZE - 1; i++)
+		ge25519_pnielsadd(&pre1[i+1], &d1, &pre1[i]);
+
+	/* set neutral */
+	memset(r, 0, sizeof(ge25519));
+	r->y[0] = 1;
+	r->z[0] = 1;
+
+	i = 255;
+	while ((i >= 0) && !(slide1[i] | slide2[i]))
+		i--;
+
+	for (; i >= 0; i--) {
+		ge25519_double_p1p1(&t, r);
+
+		if (slide1[i]) {
+			ge25519_p1p1_to_full(r, &t);
+			ge25519_pnielsadd_p1p1(&t, r, &pre1[abs(slide1[i]) / 2], (unsigned char)slide1[i] >> 7);
+		}
+
+		if (slide2[i]) {
+			ge25519_p1p1_to_full(r, &t);
+			ge25519_nielsadd2_p1p1(&t, r, &ge25519_niels_sliding_multiples[abs(slide2[i]) / 2], (unsigned char)slide2[i] >> 7);
+		}
+
+		ge25519_p1p1_to_partial(r, &t);
+	}
+}
+
+
+
+#if !defined(HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS)
+
+static uint32_t
+ge25519_windowb_equal(uint32_t b, uint32_t c) {
+	return ((b ^ c) - 1) >> 31;
+}
+
+static void
+ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
+	bignum25519 neg;
+	uint32_t sign = (uint32_t)((unsigned char)b >> 7);
+	uint32_t mask = ~(sign - 1);
+	uint32_t u = (b + mask) ^ mask;
+	uint32_t i;
+
+	/* ysubx, xaddy, t2d in packed form. initialize to ysubx = 1, xaddy = 1, t2d = 0 */
+	uint8_t packed[96] = {0};
+	packed[0] = 1;
+	packed[32] = 1;
+
+	for (i = 0; i < 8; i++)
+		curve25519_move_conditional_bytes(packed, table[(pos * 8) + i], ge25519_windowb_equal(u, i + 1));
+
+	/* expand in to t */
+	curve25519_expand(t->ysubx, packed +  0);
+	curve25519_expand(t->xaddy, packed + 32);
+	curve25519_expand(t->t2d  , packed + 64);
+
+	/* adjust for sign */
+	curve25519_swap_conditional(t->ysubx, t->xaddy, sign);
+	curve25519_neg(neg, t->t2d);
+	curve25519_swap_conditional(t->t2d, neg, sign);
+}
+
+#endif /* HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS */
+
+
+/* computes [s]basepoint */
+static void
+ge25519_scalarmult_base_niels(ge25519 *r, const uint8_t basepoint_table[256][96], const bignum256modm s) {
+	signed char b[64];
+	uint32_t i;
+	ge25519_niels t;
+
+	contract256_window4_modm(b, s);
+
+	ge25519_scalarmult_base_choose_niels(&t, basepoint_table, 0, b[1]);
+	curve25519_sub_reduce(r->x, t.xaddy, t.ysubx);
+	curve25519_add_reduce(r->y, t.xaddy, t.ysubx);
+	memset(r->z, 0, sizeof(bignum25519));
+	curve25519_copy(r->t, t.t2d);
+	r->z[0] = 2;	
+	for (i = 3; i < 64; i += 2) {
+		ge25519_scalarmult_base_choose_niels(&t, basepoint_table, i / 2, b[i]);
+		ge25519_nielsadd2(r, &t);
+	}
+	ge25519_double_partial(r, r);
+	ge25519_double_partial(r, r);
+	ge25519_double_partial(r, r);
+	ge25519_double(r, r);
+	ge25519_scalarmult_base_choose_niels(&t, basepoint_table, 0, b[0]);
+	curve25519_mul(t.t2d, t.t2d, ge25519_ecd);
+	ge25519_nielsadd2(r, &t);
+	for(i = 2; i < 64; i += 2) {
+		ge25519_scalarmult_base_choose_niels(&t, basepoint_table, i / 2, b[i]);
+		ge25519_nielsadd2(r, &t);
+	}
+}
+

src/external/ed25519-donna/ed25519-donna-impl-sse2.h

@@ -0,0 +1,390 @@
+/*
+	conversions
+*/
+
+static void
+ge25519_p1p1_to_partial(ge25519 *r, const ge25519_p1p1 *p) {
+	packed64bignum25519 ALIGN(16) xz, tt, xzout;
+	curve25519_mul(r->y, p->y, p->z);
+	curve25519_tangle64(xz, p->x, p->z);
+	curve25519_tangleone64(tt, p->t);
+	curve25519_mul_packed64(xzout, xz, tt);
+	curve25519_untangle64(r->x, r->z, xzout);
+}
+
+static void 
+ge25519_p1p1_to_full(ge25519 *r, const ge25519_p1p1 *p) {
+	packed64bignum25519 ALIGN(16) zy, xt, xx, zz, ty;
+	curve25519_tangle64(ty, p->t, p->y);
+	curve25519_tangleone64(xx, p->x);
+	curve25519_mul_packed64(xt, xx, ty);
+	curve25519_untangle64(r->x, r->t, xt);
+	curve25519_tangleone64(zz, p->z);
+	curve25519_mul_packed64(zy, zz, ty);
+	curve25519_untangle64(r->z, r->y, zy);
+}
+
+static void
+ge25519_full_to_pniels(ge25519_pniels *p, const ge25519 *r) {
+	curve25519_sub(p->ysubx, r->y, r->x);
+	curve25519_add(p->xaddy, r->x, r->y);
+	curve25519_copy(p->z, r->z);
+	curve25519_mul(p->t2d, r->t, ge25519_ec2d);
+}
+
+/*
+	adding & doubling
+*/
+
+static void
+ge25519_add_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519 *q) {
+	bignum25519 ALIGN(16) a,b,c,d;
+	packed32bignum25519 ALIGN(16) xx, yy, yypxx, yymxx, bd, ac, bdmac, bdpac;
+	packed64bignum25519 ALIGN(16) at, bu, atbu, ptz, qtz, cd;
+
+	curve25519_tangle32(yy, p->y, q->y);
+	curve25519_tangle32(xx, p->x, q->x);
+	curve25519_add_packed32(yypxx, yy, xx);
+	curve25519_sub_packed32(yymxx, yy, xx);
+	curve25519_tangle64_from32(at, bu, yymxx, yypxx);
+	curve25519_mul_packed64(atbu, at, bu);
+	curve25519_untangle64(a, b, atbu);
+	curve25519_tangle64(ptz, p->t, p->z);
+	curve25519_tangle64(qtz, q->t, q->z);
+	curve25519_mul_packed64(cd, ptz, qtz);
+	curve25519_untangle64(c, d, cd);
+	curve25519_mul(c, c, ge25519_ec2d);
+	curve25519_add_reduce(d, d, d);
+	/* reduce, so no after_basic is needed later */
+	curve25519_tangle32(bd, b, d);
+	curve25519_tangle32(ac, a, c);
+	curve25519_sub_packed32(bdmac, bd, ac);
+	curve25519_add_packed32(bdpac, bd, ac);
+	curve25519_untangle32(r->x, r->t, bdmac);
+	curve25519_untangle32(r->y, r->z, bdpac);
+}
+
+
+static void
+ge25519_double_p1p1(ge25519_p1p1 *r, const ge25519 *p) {
+	bignum25519 ALIGN(16) a,b,c,x;
+	packed64bignum25519 ALIGN(16) xy, zx, ab, cx;
+	packed32bignum25519 ALIGN(16) xc, yz, xt, yc, ac, bc;
+
+	curve25519_add(x, p->x, p->y);
+	curve25519_tangle64(xy, p->x, p->y);
+	curve25519_square_packed64(ab, xy);
+	curve25519_untangle64(a, b, ab);
+	curve25519_tangle64(zx, p->z, x);
+	curve25519_square_packed64(cx, zx);
+	curve25519_untangle64(c, x, cx);
+	curve25519_tangle32(bc, b, c);
+	curve25519_tangle32(ac, a, c);
+	curve25519_add_reduce_packed32(yc, bc, ac);
+	curve25519_untangle32(r->y, c, yc);
+	curve25519_sub(r->z, b, a);
+	curve25519_tangle32(yz, r->y, r->z);
+	curve25519_tangle32(xc, x, c);
+	curve25519_sub_after_basic_packed32(xt, xc, yz);
+	curve25519_untangle32(r->x, r->t, xt);
+}
+
+static void
+ge25519_nielsadd2_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519_niels *q, unsigned char signbit) {
+	const bignum25519 *qb = (const bignum25519 *)q;
+	bignum25519 *rb = (bignum25519 *)r;
+	bignum25519 ALIGN(16) a,b,c;
+	packed64bignum25519 ALIGN(16) ab, yx, aybx;
+	packed32bignum25519 ALIGN(16) bd, ac, bdac;
+
+	curve25519_sub(a, p->y, p->x);
+	curve25519_add(b, p->y, p->x);
+	curve25519_tangle64(ab, a, b);
+	curve25519_tangle64(yx, qb[signbit], qb[signbit^1]);
+	curve25519_mul_packed64(aybx, ab, yx);
+	curve25519_untangle64(a, b, aybx);
+	curve25519_add(r->y, b, a);
+	curve25519_add_reduce(r->t, p->z, p->z);
+	curve25519_mul(c, p->t, q->t2d);
+	curve25519_copy(r->z, r->t);
+	curve25519_add(rb[2+signbit], rb[2+signbit], c);
+	curve25519_tangle32(bd, b, rb[2+(signbit^1)]);
+	curve25519_tangle32(ac, a, c);
+	curve25519_sub_packed32(bdac, bd, ac);
+	curve25519_untangle32(r->x, rb[2+(signbit^1)], bdac);
+}
+
+static void
+ge25519_pnielsadd_p1p1(ge25519_p1p1 *r, const ge25519 *p, const ge25519_pniels *q, unsigned char signbit) {
+	const bignum25519 *qb = (const bignum25519 *)q;
+	bignum25519 *rb = (bignum25519 *)r;
+	bignum25519 ALIGN(16) a,b,c;
+	packed64bignum25519 ALIGN(16) ab, yx, aybx, zt, zt2d, tc;
+	packed32bignum25519 ALIGN(16) bd, ac, bdac;
+
+	curve25519_sub(a, p->y, p->x);
+	curve25519_add(b, p->y, p->x);
+	curve25519_tangle64(ab, a, b);
+	curve25519_tangle64(yx, qb[signbit], qb[signbit^1]);
+	curve25519_mul_packed64(aybx, ab, yx);
+	curve25519_untangle64(a, b, aybx);
+	curve25519_add(r->y, b, a);
+	curve25519_tangle64(zt, p->z, p->t);
+	curve25519_tangle64(zt2d, q->z, q->t2d);
+	curve25519_mul_packed64(tc, zt, zt2d);
+	curve25519_untangle64(r->t, c, tc);
+	curve25519_add_reduce(r->t, r->t, r->t);
+	curve25519_copy(r->z, r->t);
+	curve25519_add(rb[2+signbit], rb[2+signbit], c);
+	curve25519_tangle32(bd, b, rb[2+(signbit^1)]);
+	curve25519_tangle32(ac, a, c);
+	curve25519_sub_packed32(bdac, bd, ac);
+	curve25519_untangle32(r->x, rb[2+(signbit^1)], bdac);
+}
+
+static void
+ge25519_double(ge25519 *r, const ge25519 *p) {
+	ge25519_p1p1 ALIGN(16) t;
+	ge25519_double_p1p1(&t, p);
+	ge25519_p1p1_to_full(r, &t);
+}
+
+static void
+ge25519_add(ge25519 *r, const ge25519 *p, const ge25519 *q) {
+	ge25519_p1p1 ALIGN(16) t;
+	ge25519_add_p1p1(&t, p, q);
+	ge25519_p1p1_to_full(r, &t);
+}
+
+static void
+ge25519_double_partial(ge25519 *r, const ge25519 *p) {
+	ge25519_p1p1 ALIGN(16) t;
+	ge25519_double_p1p1(&t, p);
+	ge25519_p1p1_to_partial(r, &t);
+}
+
+static void
+ge25519_nielsadd2(ge25519 *r, const ge25519_niels *q) {
+	packed64bignum25519 ALIGN(16) ab, yx, aybx, eg, ff, hh, xz, ty;
+	packed32bignum25519 ALIGN(16) bd, ac, bdac;
+	bignum25519 ALIGN(16) a,b,c,d,e,f,g,h;
+
+	curve25519_sub(a, r->y, r->x);
+	curve25519_add(b, r->y, r->x);
+	curve25519_tangle64(ab, a, b);
+	curve25519_tangle64(yx, q->ysubx, q->xaddy);
+	curve25519_mul_packed64(aybx, ab, yx);
+	curve25519_untangle64(a, b, aybx);
+	curve25519_add(h, b, a);
+	curve25519_add_reduce(d, r->z, r->z);
+	curve25519_mul(c, r->t, q->t2d);
+	curve25519_add(g, d, c); /* d is reduced, so no need for after_basic */
+	curve25519_tangle32(bd, b, d);
+	curve25519_tangle32(ac, a, c);
+	curve25519_sub_packed32(bdac, bd, ac); /* d is reduced, so no need for after_basic */
+	curve25519_untangle32(e, f, bdac);
+	curve25519_tangle64(eg, e, g);
+	curve25519_tangleone64(ff, f);
+	curve25519_mul_packed64(xz, eg, ff);
+	curve25519_untangle64(r->x, r->z, xz);
+	curve25519_tangleone64(hh, h);
+	curve25519_mul_packed64(ty, eg, hh);
+	curve25519_untangle64(r->t, r->y, ty);
+}
+
+static void
+ge25519_pnielsadd(ge25519_pniels *r, const ge25519 *p, const ge25519_pniels *q) {
+	ge25519_p1p1 ALIGN(16) t;
+	ge25519 ALIGN(16) f;
+	ge25519_pnielsadd_p1p1(&t, p, q, 0);
+	ge25519_p1p1_to_full(&f, &t);
+	ge25519_full_to_pniels(r, &f);
+}
+
+/*
+	pack & unpack
+*/
+
+static void
+ge25519_pack(unsigned char r[32], const ge25519 *p) {
+	bignum25519 ALIGN(16) tx, ty, zi;
+	unsigned char parity[32];
+	curve25519_recip(zi, p->z);
+	curve25519_mul(tx, p->x, zi);
+	curve25519_mul(ty, p->y, zi);
+	curve25519_contract(r, ty);
+	curve25519_contract(parity, tx);
+	r[31] ^= ((parity[0] & 1) << 7);
+}
+
+
+static int
+ge25519_unpack_negative_vartime(ge25519 *r, const unsigned char p[32]) {
+	static const bignum25519 ALIGN(16) one = {1};
+	static const unsigned char zero[32] = {0};
+	unsigned char parity = p[31] >> 7;
+	unsigned char check[32];
+	bignum25519 ALIGN(16) t, root, num, den, d3;
+
+	curve25519_expand(r->y, p);
+	curve25519_copy(r->z, one);
+	curve25519_square_times(num, r->y, 1); /* x = y^2 */
+	curve25519_mul(den, num, ge25519_ecd); /* den = dy^2 */
+	curve25519_sub_reduce(num,  num, r->z); /* x = y^2 - 1 */
+	curve25519_add(den, den, r->z); /* den = dy^2 + 1 */
+
+	/* Computation of sqrt(num/den) */
+	/* 1.: computation of num^((p-5)/8)*den^((7p-35)/8) = (num*den^7)^((p-5)/8) */
+	curve25519_square_times(t, den, 1);
+	curve25519_mul(d3, t, den);
+	curve25519_square_times(r->x, d3, 1);
+	curve25519_mul(r->x, r->x, den);
+	curve25519_mul(r->x, r->x, num);
+	curve25519_pow_two252m3(r->x, r->x);
+
+	/* 2. computation of r->x = t * num * den^3 */
+	curve25519_mul(r->x, r->x, d3);
+	curve25519_mul(r->x, r->x, num);
+
+	/* 3. Check if either of the roots works: */
+	curve25519_square_times(t, r->x, 1);
+	curve25519_mul(t, t, den);
+	curve25519_copy(root, t);
+	curve25519_sub_reduce(root,  root, num);
+	curve25519_contract(check, root);
+	if (!ed25519_verify(check, zero, 32)) {
+		curve25519_add_reduce(t, t, num);
+		curve25519_contract(check, t);
+		if (!ed25519_verify(check, zero, 32))
+			return 0;
+		curve25519_mul(r->x, r->x, ge25519_sqrtneg1);
+	}
+
+	curve25519_contract(check, r->x);
+	if ((check[0] & 1) == parity) {
+		curve25519_copy(t, r->x);
+		curve25519_neg(r->x, t);
+	}
+	curve25519_mul(r->t, r->x, r->y);
+	return 1;
+}
+
+
+
+/*
+	scalarmults
+*/
+
+#define S1_SWINDOWSIZE 5
+#define S1_TABLE_SIZE (1<<(S1_SWINDOWSIZE-2))
+#define S2_SWINDOWSIZE 7
+#define S2_TABLE_SIZE (1<<(S2_SWINDOWSIZE-2))
+
+static void
+ge25519_double_scalarmult_vartime(ge25519 *r, const ge25519 *p1, const bignum256modm s1, const bignum256modm s2) {
+	signed char slide1[256], slide2[256];
+	ge25519_pniels ALIGN(16) pre1[S1_TABLE_SIZE];
+	ge25519 ALIGN(16) d1;
+	ge25519_p1p1 ALIGN(16) t;
+	int32_t i;
+
+	contract256_slidingwindow_modm(slide1, s1, S1_SWINDOWSIZE);
+	contract256_slidingwindow_modm(slide2, s2, S2_SWINDOWSIZE);
+
+	ge25519_double(&d1, p1);
+	ge25519_full_to_pniels(pre1, p1);
+	for (i = 0; i < S1_TABLE_SIZE - 1; i++)
+		ge25519_pnielsadd(&pre1[i+1], &d1, &pre1[i]);
+
+	/* set neutral */
+	memset(r, 0, sizeof(ge25519));
+	r->y[0] = 1;
+	r->z[0] = 1;
+
+	i = 255;
+	while ((i >= 0) && !(slide1[i] | slide2[i]))
+		i--;
+
+	for (; i >= 0; i--) {
+		ge25519_double_p1p1(&t, r);
+
+		if (slide1[i]) {
+			ge25519_p1p1_to_full(r, &t);
+			ge25519_pnielsadd_p1p1(&t, r, &pre1[abs(slide1[i]) / 2], (unsigned char)slide1[i] >> 7);
+		}
+
+		if (slide2[i]) {
+			ge25519_p1p1_to_full(r, &t);
+			ge25519_nielsadd2_p1p1(&t, r, &ge25519_niels_sliding_multiples[abs(slide2[i]) / 2], (unsigned char)slide2[i] >> 7);
+		}
+
+		ge25519_p1p1_to_partial(r, &t);
+	}
+}
+
+#if !defined(HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS)
+
+static uint32_t
+ge25519_windowb_equal(uint32_t b, uint32_t c) {
+	return ((b ^ c) - 1) >> 31;
+}
+
+static void
+ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
+	bignum25519 ALIGN(16) neg;
+	uint32_t sign = (uint32_t)((unsigned char)b >> 7);
+	uint32_t mask = ~(sign - 1);
+	uint32_t u = (b + mask) ^ mask;
+	uint32_t i;
+
+	/* ysubx, xaddy, t2d in packed form. initialize to ysubx = 1, xaddy = 1, t2d = 0 */
+	uint8_t ALIGN(16) packed[96] = {0};
+	packed[0] = 1;
+	packed[32] = 1;
+
+	for (i = 0; i < 8; i++)
+		curve25519_move_conditional_bytes(packed, table[(pos * 8) + i], ge25519_windowb_equal(u, i + 1));
+
+	/* expand in to t */
+	curve25519_expand(t->ysubx, packed +  0);
+	curve25519_expand(t->xaddy, packed + 32);
+	curve25519_expand(t->t2d  , packed + 64);
+
+	/* adjust for sign */
+	curve25519_swap_conditional(t->ysubx, t->xaddy, sign);
+	curve25519_neg(neg, t->t2d);
+	curve25519_swap_conditional(t->t2d, neg, sign);
+}
+
+#endif /* HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS */
+
+static void
+ge25519_scalarmult_base_niels(ge25519 *r, const uint8_t table[256][96], const bignum256modm s) {
+	signed char b[64];
+	uint32_t i;
+	ge25519_niels ALIGN(16) t;
+
+	contract256_window4_modm(b, s);
+
+	ge25519_scalarmult_base_choose_niels(&t, table, 0, b[1]);
+	curve25519_sub_reduce(r->x, t.xaddy, t.ysubx);
+	curve25519_add_reduce(r->y, t.xaddy, t.ysubx);
+	memset(r->z, 0, sizeof(bignum25519)); 
+	r->z[0] = 2;
+	curve25519_copy(r->t, t.t2d);
+	for (i = 3; i < 64; i += 2) {
+		ge25519_scalarmult_base_choose_niels(&t, table, i / 2, b[i]);
+		ge25519_nielsadd2(r, &t);
+	}
+	ge25519_double_partial(r, r);
+	ge25519_double_partial(r, r);
+	ge25519_double_partial(r, r);
+	ge25519_double(r, r);
+	ge25519_scalarmult_base_choose_niels(&t, table, 0, b[0]);
+	curve25519_mul(t.t2d, t.t2d, ge25519_ecd);
+	ge25519_nielsadd2(r, &t);
+	for(i = 2; i < 64; i += 2) {
+		ge25519_scalarmult_base_choose_niels(&t, table, i / 2, b[i]);
+		ge25519_nielsadd2(r, &t);
+	}
+}

src/external/ed25519-donna/ed25519-donna-portable-identify.h

@@ -0,0 +1,103 @@
+/* os */
+#if defined(_WIN32)	|| defined(_WIN64) || defined(__TOS_WIN__) || defined(__WINDOWS__)
+	#define OS_WINDOWS
+#elif defined(sun) || defined(__sun) || defined(__SVR4) || defined(__svr4__)
+	#define OS_SOLARIS
+#else
+	#include <sys/param.h> /* need this to define BSD */
+	#define OS_NIX
+	#if defined(__linux__)
+		#define OS_LINUX
+	#elif defined(BSD)
+		#define OS_BSD
+		#if defined(MACOS_X) || (defined(__APPLE__) & defined(__MACH__))
+			#define OS_OSX
+		#elif defined(macintosh) || defined(Macintosh)
+			#define OS_MAC
+		#elif defined(__OpenBSD__)
+			#define OS_OPENBSD
+		#endif
+	#endif
+#endif
+
+
+/* compiler */
+#if defined(_MSC_VER)
+	#define COMPILER_MSVC
+#endif
+#if defined(__ICC)
+	#define COMPILER_INTEL
+#endif
+#if defined(__GNUC__)
+	#if (__GNUC__ >= 3)
+		#define COMPILER_GCC ((__GNUC__ * 10000) + (__GNUC_MINOR__ * 100) + (__GNUC_PATCHLEVEL__))
+	#else
+		#define COMPILER_GCC ((__GNUC__ * 10000) + (__GNUC_MINOR__ * 100)                        )
+	#endif
+#endif
+#if defined(__PATHCC__)
+	#define COMPILER_PATHCC
+#endif
+#if defined(__clang__)
+	#define COMPILER_CLANG ((__clang_major__ * 10000) + (__clang_minor__ * 100) + (__clang_patchlevel__))
+#endif
+
+
+
+/* cpu */
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__ ) || defined(_M_X64)
+	#define CPU_X86_64
+#elif defined(__i586__) || defined(__i686__) || (defined(_M_IX86) && (_M_IX86 >= 500))
+	#define CPU_X86 500
+#elif defined(__i486__) || (defined(_M_IX86) && (_M_IX86 >= 400))
+	#define CPU_X86 400
+#elif defined(__i386__) || (defined(_M_IX86) && (_M_IX86 >= 300)) || defined(__X86__) || defined(_X86_) || defined(__I86__)
+	#define CPU_X86 300
+#elif defined(__ia64__) || defined(_IA64) || defined(__IA64__) || defined(_M_IA64) || defined(__ia64)
+	#define CPU_IA64
+#endif
+
+#if defined(__sparc__) || defined(__sparc) || defined(__sparcv9)
+	#define CPU_SPARC
+	#if defined(__sparcv9)
+		#define CPU_SPARC64
+	#endif
+#endif
+
+#if defined(powerpc) || defined(__PPC__) || defined(__ppc__) || defined(_ARCH_PPC) || defined(__powerpc__) || defined(__powerpc) || defined(POWERPC) || defined(_M_PPC)
+	#define CPU_PPC
+	#if defined(_ARCH_PWR7)
+		#define CPU_POWER7
+	#elif defined(__64BIT__)
+		#define CPU_PPC64
+	#else
+		#define CPU_PPC32
+	#endif
+#endif
+
+#if defined(__hppa__) || defined(__hppa)
+	#define CPU_HPPA
+#endif
+
+#if defined(__alpha__) || defined(__alpha) || defined(_M_ALPHA)
+	#define CPU_ALPHA
+#endif
+
+/* 64 bit cpu */
+#if defined(CPU_X86_64) || defined(CPU_IA64) || defined(CPU_SPARC64) || defined(__64BIT__) || defined(__LP64__) || defined(_LP64) || (defined(_MIPS_SZLONG) && (_MIPS_SZLONG == 64))
+	#define CPU_64BITS
+#endif
+
+#if defined(COMPILER_MSVC)
+	typedef signed char int8_t;
+	typedef unsigned char uint8_t;
+	typedef signed short int16_t;
+	typedef unsigned short uint16_t;
+	typedef signed int int32_t;
+	typedef unsigned int uint32_t;
+	typedef signed __int64 int64_t;
+	typedef unsigned __int64 uint64_t;
+#else
+	#include <stdint.h>
+#endif
+

src/external/ed25519-donna/ed25519-donna-portable.h

@@ -0,0 +1,135 @@
+#include "ed25519-donna-portable-identify.h"
+
+#define mul32x32_64(a,b) (((uint64_t)(a))*(b))
+
+/* platform */
+#if defined(COMPILER_MSVC)
+	#include <intrin.h>
+	#if !defined(_DEBUG)
+		#undef mul32x32_64		
+		#define mul32x32_64(a,b) __emulu(a,b)
+	#endif
+	#undef inline
+	#define inline __forceinline
+	#define DONNA_INLINE __forceinline
+	#define DONNA_NOINLINE __declspec(noinline)
+	#define ALIGN(x) __declspec(align(x))
+	#define ROTL32(a,b) _rotl(a,b)
+	#define ROTR32(a,b) _rotr(a,b)
+#else
+	#include <sys/param.h>
+	#define DONNA_INLINE inline __attribute__((always_inline))
+	#define DONNA_NOINLINE __attribute__((noinline))
+	#define ALIGN(x) __attribute__((aligned(x)))
+	#define ROTL32(a,b) (((a) << (b)) | ((a) >> (32 - b)))
+	#define ROTR32(a,b) (((a) >> (b)) | ((a) << (32 - b)))
+#endif
+
+/* uint128_t */
+#if defined(CPU_64BITS) && !defined(ED25519_FORCE_32BIT)
+	#if defined(COMPILER_CLANG) && (COMPILER_CLANG >= 30100)
+		#define HAVE_NATIVE_UINT128
+		typedef unsigned __int128 uint128_t;
+	#elif defined(COMPILER_MSVC)
+		#define HAVE_UINT128
+		typedef struct uint128_t {
+			uint64_t lo, hi;
+		} uint128_t;
+		#define mul64x64_128(out,a,b) out.lo = _umul128(a,b,&out.hi);
+		#define shr128_pair(out,hi,lo,shift) out = __shiftright128(lo, hi, shift);
+		#define shl128_pair(out,hi,lo,shift) out = __shiftleft128(lo, hi, shift);
+		#define shr128(out,in,shift) shr128_pair(out, in.hi, in.lo, shift)
+		#define shl128(out,in,shift) shl128_pair(out, in.hi, in.lo, shift)
+		#define add128(a,b) { uint64_t p = a.lo; a.lo += b.lo; a.hi += b.hi + (a.lo < p); }
+		#define add128_64(a,b) { uint64_t p = a.lo; a.lo += b; a.hi += (a.lo < p); }
+		#define lo128(a) (a.lo)
+		#define hi128(a) (a.hi)
+	#elif defined(COMPILER_GCC) && !defined(HAVE_NATIVE_UINT128)
+		#if defined(__SIZEOF_INT128__)
+			#define HAVE_NATIVE_UINT128
+			typedef unsigned __int128 uint128_t;
+		#elif (COMPILER_GCC >= 40400)
+			#define HAVE_NATIVE_UINT128
+			typedef unsigned uint128_t __attribute__((mode(TI)));
+		#elif defined(CPU_X86_64)
+			#define HAVE_UINT128
+			typedef struct uint128_t {
+				uint64_t lo, hi;
+			} uint128_t;
+			#define mul64x64_128(out,a,b) __asm__ ("mulq %3" : "=a" (out.lo), "=d" (out.hi) : "a" (a), "rm" (b));
+			#define shr128_pair(out,hi,lo,shift) __asm__ ("shrdq %2,%1,%0" : "+r" (lo) : "r" (hi), "J" (shift)); out = lo;
+			#define shl128_pair(out,hi,lo,shift) __asm__ ("shldq %2,%1,%0" : "+r" (hi) : "r" (lo), "J" (shift)); out = hi;
+			#define shr128(out,in,shift) shr128_pair(out,in.hi, in.lo, shift)
+			#define shl128(out,in,shift) shl128_pair(out,in.hi, in.lo, shift)
+			#define add128(a,b) __asm__ ("addq %4,%2; adcq %5,%3" : "=r" (a.hi), "=r" (a.lo) : "1" (a.lo), "0" (a.hi), "rm" (b.lo), "rm" (b.hi) : "cc");
+			#define add128_64(a,b) __asm__ ("addq %4,%2; adcq $0,%3" : "=r" (a.hi), "=r" (a.lo) : "1" (a.lo), "0" (a.hi), "rm" (b) : "cc");
+			#define lo128(a) (a.lo)
+			#define hi128(a) (a.hi)
+		#endif
+	#endif
+
+	#if defined(HAVE_NATIVE_UINT128)
+		#define HAVE_UINT128
+		#define mul64x64_128(out,a,b) out = (uint128_t)a * b;
+		#define shr128_pair(out,hi,lo,shift) out = (uint64_t)((((uint128_t)hi << 64) | lo) >> (shift));
+		#define shl128_pair(out,hi,lo,shift) out = (uint64_t)(((((uint128_t)hi << 64) | lo) << (shift)) >> 64);
+		#define shr128(out,in,shift) out = (uint64_t)(in >> (shift));
+		#define shl128(out,in,shift) out = (uint64_t)((in << shift) >> 64);
+		#define add128(a,b) a += b;
+		#define add128_64(a,b) a += (uint64_t)b;
+		#define lo128(a) ((uint64_t)a)
+		#define hi128(a) ((uint64_t)(a >> 64))
+	#endif
+
+	#if !defined(HAVE_UINT128)
+		#error Need a uint128_t implementation!
+	#endif
+#endif
+
+/* endian */
+#if !defined(ED25519_OPENSSLRNG)
+static inline void U32TO8_LE(unsigned char *p, const uint32_t v) {
+	p[0] = (unsigned char)(v      );
+	p[1] = (unsigned char)(v >>  8);
+	p[2] = (unsigned char)(v >> 16);
+	p[3] = (unsigned char)(v >> 24);
+}
+#endif
+
+#if !defined(HAVE_UINT128)
+static inline uint32_t U8TO32_LE(const unsigned char *p) {
+	return
+	(((uint32_t)(p[0])      ) | 
+	 ((uint32_t)(p[1]) <<  8) |
+	 ((uint32_t)(p[2]) << 16) |
+	 ((uint32_t)(p[3]) << 24));
+}
+#else
+static inline uint64_t U8TO64_LE(const unsigned char *p) {
+	return
+	(((uint64_t)(p[0])      ) |
+	 ((uint64_t)(p[1]) <<  8) |
+	 ((uint64_t)(p[2]) << 16) |
+	 ((uint64_t)(p[3]) << 24) |
+	 ((uint64_t)(p[4]) << 32) |
+	 ((uint64_t)(p[5]) << 40) |
+	 ((uint64_t)(p[6]) << 48) |
+	 ((uint64_t)(p[7]) << 56));
+}
+
+static inline void U64TO8_LE(unsigned char *p, const uint64_t v) {
+	p[0] = (unsigned char)(v      );
+	p[1] = (unsigned char)(v >>  8);
+	p[2] = (unsigned char)(v >> 16);
+	p[3] = (unsigned char)(v >> 24);
+	p[4] = (unsigned char)(v >> 32);
+	p[5] = (unsigned char)(v >> 40);
+	p[6] = (unsigned char)(v >> 48);
+	p[7] = (unsigned char)(v >> 56);
+}
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+

src/external/ed25519-donna/ed25519-donna.h

@@ -0,0 +1,115 @@
+/*
+	Public domain by Andrew M. <liquidsun@gmail.com>
+	Modified from the amd64-51-30k implementation by
+		Daniel J. Bernstein
+		Niels Duif
+		Tanja Lange
+		Peter Schwabe
+		Bo-Yin Yang
+*/
+
+
+#include "ed25519-donna-portable.h"
+
+#if defined(ED25519_SSE2)
+#else
+	#if defined(HAVE_UINT128) && !defined(ED25519_FORCE_32BIT)
+		#define ED25519_64BIT
+	#else
+		#define ED25519_32BIT
+	#endif
+#endif
+
+#if !defined(ED25519_NO_INLINE_ASM)
+	/* detect extra features first so un-needed functions can be disabled throughout */
+	#if defined(ED25519_SSE2)
+		#if defined(COMPILER_GCC) && defined(CPU_X86)
+			#define ED25519_GCC_32BIT_SSE_CHOOSE
+		#elif defined(COMPILER_GCC) && defined(CPU_X86_64)
+			#define ED25519_GCC_64BIT_SSE_CHOOSE
+		#endif
+	#else
+		#if defined(CPU_X86_64)
+			#if defined(COMPILER_GCC) 
+				#if defined(ED25519_64BIT)
+					#define ED25519_GCC_64BIT_X86_CHOOSE
+				#else
+					#define ED25519_GCC_64BIT_32BIT_CHOOSE
+				#endif
+			#endif
+		#endif
+	#endif
+#endif
+
+#if defined(ED25519_SSE2)
+	#include "curve25519-donna-sse2.h"
+#elif defined(ED25519_64BIT)
+	#include "curve25519-donna-64bit.h"
+#else
+	#include "curve25519-donna-32bit.h"
+#endif
+
+#include "curve25519-donna-helpers.h"
+
+/* separate uint128 check for 64 bit sse2 */
+#if defined(HAVE_UINT128) && !defined(ED25519_FORCE_32BIT)
+	#include "modm-donna-64bit.h"
+#else
+	#include "modm-donna-32bit.h"
+#endif
+
+typedef unsigned char hash_512bits[64];
+
+/*
+	Timing safe memory compare
+*/
+static int
+ed25519_verify(const unsigned char *x, const unsigned char *y, size_t len) {
+	size_t differentbits = 0;
+	while (len--)
+		differentbits |= (*x++ ^ *y++);
+	return (int) (1 & ((differentbits - 1) >> 8));
+}
+
+
+/*
+ * Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2
+ * with d = -(121665/121666) = 37095705934669439343138083508754565189542113879843219016388785533085940283555
+ * Base point: (15112221349535400772501151409588531511454012693041857206046113283949847762202,46316835694926478169428394003475163141307993866256225615783033603165251855960);
+ */
+
+typedef struct ge25519_t {
+	bignum25519 x, y, z, t;
+} ge25519;
+
+typedef struct ge25519_p1p1_t {
+	bignum25519 x, y, z, t;
+} ge25519_p1p1;
+
+typedef struct ge25519_niels_t {
+	bignum25519 ysubx, xaddy, t2d;
+} ge25519_niels;
+
+typedef struct ge25519_pniels_t {
+	bignum25519 ysubx, xaddy, z, t2d;
+} ge25519_pniels;
+
+#include "ed25519-donna-basepoint-table.h"
+
+#if defined(ED25519_64BIT)
+	#include "ed25519-donna-64bit-tables.h"
+	#include "ed25519-donna-64bit-x86.h"
+#else
+	#include "ed25519-donna-32bit-tables.h"
+	#include "ed25519-donna-64bit-x86-32bit.h"
+#endif
+
+
+#if defined(ED25519_SSE2)
+	#include "ed25519-donna-32bit-sse2.h"
+	#include "ed25519-donna-64bit-sse2.h"
+	#include "ed25519-donna-impl-sse2.h"
+#else
+	#include "ed25519-donna-impl-base.h"
+#endif
+

src/external/ed25519-donna/ed25519-hash-custom.h

@@ -0,0 +1,11 @@
+/*
+	a custom hash must have a 512bit digest and implement:
+
+	struct ed25519_hash_context;
+
+	void ed25519_hash_init(ed25519_hash_context *ctx);
+	void ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen);
+	void ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash);
+	void ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen);
+*/
+

src/external/ed25519-donna/ed25519-hash.h

@@ -0,0 +1,219 @@
+#if defined(ED25519_REFHASH)
+
+/* reference/slow SHA-512. really, do not use this */
+
+#define HASH_BLOCK_SIZE 128
+#define HASH_DIGEST_SIZE 64
+
+typedef struct sha512_state_t {
+	uint64_t H[8];
+	uint64_t T[2];
+	uint32_t leftover;
+	uint8_t buffer[HASH_BLOCK_SIZE];
+} sha512_state;
+
+typedef sha512_state ed25519_hash_context;
+
+static const uint64_t sha512_constants[80] = {
+	0x428a2f98d728ae22ull, 0x7137449123ef65cdull, 0xb5c0fbcfec4d3b2full, 0xe9b5dba58189dbbcull,
+	0x3956c25bf348b538ull, 0x59f111f1b605d019ull, 0x923f82a4af194f9bull, 0xab1c5ed5da6d8118ull,
+	0xd807aa98a3030242ull, 0x12835b0145706fbeull, 0x243185be4ee4b28cull, 0x550c7dc3d5ffb4e2ull,
+	0x72be5d74f27b896full, 0x80deb1fe3b1696b1ull, 0x9bdc06a725c71235ull, 0xc19bf174cf692694ull,
+	0xe49b69c19ef14ad2ull, 0xefbe4786384f25e3ull, 0x0fc19dc68b8cd5b5ull, 0x240ca1cc77ac9c65ull,
+	0x2de92c6f592b0275ull, 0x4a7484aa6ea6e483ull, 0x5cb0a9dcbd41fbd4ull, 0x76f988da831153b5ull,
+	0x983e5152ee66dfabull, 0xa831c66d2db43210ull, 0xb00327c898fb213full, 0xbf597fc7beef0ee4ull,
+	0xc6e00bf33da88fc2ull, 0xd5a79147930aa725ull, 0x06ca6351e003826full, 0x142929670a0e6e70ull,
+	0x27b70a8546d22ffcull, 0x2e1b21385c26c926ull, 0x4d2c6dfc5ac42aedull, 0x53380d139d95b3dfull,
+	0x650a73548baf63deull, 0x766a0abb3c77b2a8ull, 0x81c2c92e47edaee6ull, 0x92722c851482353bull,
+	0xa2bfe8a14cf10364ull, 0xa81a664bbc423001ull, 0xc24b8b70d0f89791ull, 0xc76c51a30654be30ull,
+	0xd192e819d6ef5218ull, 0xd69906245565a910ull, 0xf40e35855771202aull, 0x106aa07032bbd1b8ull,
+	0x19a4c116b8d2d0c8ull, 0x1e376c085141ab53ull, 0x2748774cdf8eeb99ull, 0x34b0bcb5e19b48a8ull,
+	0x391c0cb3c5c95a63ull, 0x4ed8aa4ae3418acbull, 0x5b9cca4f7763e373ull, 0x682e6ff3d6b2b8a3ull,
+	0x748f82ee5defb2fcull, 0x78a5636f43172f60ull, 0x84c87814a1f0ab72ull, 0x8cc702081a6439ecull,
+	0x90befffa23631e28ull, 0xa4506cebde82bde9ull, 0xbef9a3f7b2c67915ull, 0xc67178f2e372532bull,
+	0xca273eceea26619cull, 0xd186b8c721c0c207ull, 0xeada7dd6cde0eb1eull, 0xf57d4f7fee6ed178ull,
+	0x06f067aa72176fbaull, 0x0a637dc5a2c898a6ull, 0x113f9804bef90daeull, 0x1b710b35131c471bull,
+	0x28db77f523047d84ull, 0x32caab7b40c72493ull, 0x3c9ebe0a15c9bebcull, 0x431d67c49c100d4cull,
+	0x4cc5d4becb3e42b6ull, 0x597f299cfc657e2aull, 0x5fcb6fab3ad6faecull, 0x6c44198c4a475817ull
+};
+
+static uint64_t
+sha512_ROTR64(uint64_t x, int k) {
+	return (x >> k) | (x << (64 - k));
+}
+
+static uint64_t
+sha512_LOAD64_BE(const uint8_t *p) {
+	return 
+		((uint64_t)p[0] << 56) |
+		((uint64_t)p[1] << 48) |
+		((uint64_t)p[2] << 40) |
+		((uint64_t)p[3] << 32) |
+		((uint64_t)p[4] << 24) |
+		((uint64_t)p[5] << 16) |
+		((uint64_t)p[6] <<  8) |
+		((uint64_t)p[7]      );
+}
+
+static void
+sha512_STORE64_BE(uint8_t *p, uint64_t v) {
+	p[0] = (uint8_t)(v >> 56);
+	p[1] = (uint8_t)(v >> 48);
+	p[2] = (uint8_t)(v >> 40);
+	p[3] = (uint8_t)(v >> 32);
+	p[4] = (uint8_t)(v >> 24);
+	p[5] = (uint8_t)(v >> 16);
+	p[6] = (uint8_t)(v >>  8);
+	p[7] = (uint8_t)(v      );
+}
+
+#define Ch(x,y,z)  (z ^ (x & (y ^ z)))
+#define Maj(x,y,z) (((x | y) & z) | (x & y))
+#define S0(x)      (sha512_ROTR64(x, 28) ^ sha512_ROTR64(x, 34) ^ sha512_ROTR64(x, 39))
+#define S1(x)      (sha512_ROTR64(x, 14) ^ sha512_ROTR64(x, 18) ^ sha512_ROTR64(x, 41))
+#define G0(x)      (sha512_ROTR64(x,  1) ^ sha512_ROTR64(x,  8) ^ (x >>  7))
+#define G1(x)      (sha512_ROTR64(x, 19) ^ sha512_ROTR64(x, 61) ^ (x >>  6))
+#define W0(in,i)   (sha512_LOAD64_BE(&in[i * 8]))
+#define W1(i)      (G1(w[i - 2]) + w[i - 7] + G0(w[i - 15]) + w[i - 16])
+#define STEP(i) \
+	t1 = S0(r[0]) + Maj(r[0], r[1], r[2]); \
+	t0 = r[7] + S1(r[4]) + Ch(r[4], r[5], r[6]) + sha512_constants[i] + w[i]; \
+	r[7] = r[6]; \
+	r[6] = r[5]; \
+	r[5] = r[4]; \
+	r[4] = r[3] + t0; \
+	r[3] = r[2]; \
+	r[2] = r[1]; \
+	r[1] = r[0]; \
+	r[0] = t0 + t1;
+
+static void
+sha512_blocks(sha512_state *S, const uint8_t *in, size_t blocks) {
+	uint64_t r[8], w[80], t0, t1;
+	size_t i;
+
+	for (i = 0; i < 8; i++) r[i] = S->H[i];
+
+	while (blocks--) {
+		for (i =  0; i < 16; i++) { w[i] = W0(in, i); }
+		for (i = 16; i < 80; i++) { w[i] = W1(i); }
+		for (i =  0; i < 80; i++) { STEP(i); }
+		for (i =  0; i <  8; i++) { r[i] += S->H[i]; S->H[i] = r[i]; }
+		S->T[0] += HASH_BLOCK_SIZE * 8;
+		S->T[1] += (!S->T[0]) ? 1 : 0;
+		in += HASH_BLOCK_SIZE;
+	}
+}
+
+static void
+ed25519_hash_init(sha512_state *S) {
+	S->H[0] = 0x6a09e667f3bcc908ull;
+	S->H[1] = 0xbb67ae8584caa73bull;
+	S->H[2] = 0x3c6ef372fe94f82bull;
+	S->H[3] = 0xa54ff53a5f1d36f1ull;
+	S->H[4] = 0x510e527fade682d1ull;
+	S->H[5] = 0x9b05688c2b3e6c1full;
+	S->H[6] = 0x1f83d9abfb41bd6bull;
+	S->H[7] = 0x5be0cd19137e2179ull;
+	S->T[0] = 0;
+	S->T[1] = 0;
+	S->leftover = 0;
+}
+
+static void
+ed25519_hash_update(sha512_state *S, const uint8_t *in, size_t inlen) {
+	size_t blocks, want;
+
+	/* handle the previous data */
+	if (S->leftover) {
+		want = (HASH_BLOCK_SIZE - S->leftover);
+		want = (want < inlen) ? want : inlen;
+		memcpy(S->buffer + S->leftover, in, want);
+		S->leftover += (uint32_t)want;
+		if (S->leftover < HASH_BLOCK_SIZE)
+			return;
+		in += want;
+		inlen -= want;
+		sha512_blocks(S, S->buffer, 1);
+	}
+
+	/* handle the current data */
+	blocks = (inlen & ~(HASH_BLOCK_SIZE - 1));
+	S->leftover = (uint32_t)(inlen - blocks);
+	if (blocks) {
+		sha512_blocks(S, in, blocks / HASH_BLOCK_SIZE);
+		in += blocks;
+	}
+
+	/* handle leftover data */
+	if (S->leftover)
+		memcpy(S->buffer, in, S->leftover);
+}
+
+static void
+ed25519_hash_final(sha512_state *S, uint8_t *hash) {
+	uint64_t t0 = S->T[0] + (S->leftover * 8), t1 = S->T[1];
+
+	S->buffer[S->leftover] = 0x80;
+	if (S->leftover <= 111) {
+		memset(S->buffer + S->leftover + 1, 0, 111 - S->leftover);
+	} else {
+		memset(S->buffer + S->leftover + 1, 0, 127 - S->leftover);
+		sha512_blocks(S, S->buffer, 1);
+		memset(S->buffer, 0, 112);
+	}
+
+	sha512_STORE64_BE(S->buffer + 112, t1);
+	sha512_STORE64_BE(S->buffer + 120, t0);
+	sha512_blocks(S, S->buffer, 1);
+
+	sha512_STORE64_BE(&hash[ 0], S->H[0]);
+	sha512_STORE64_BE(&hash[ 8], S->H[1]);
+	sha512_STORE64_BE(&hash[16], S->H[2]);
+	sha512_STORE64_BE(&hash[24], S->H[3]);
+	sha512_STORE64_BE(&hash[32], S->H[4]);
+	sha512_STORE64_BE(&hash[40], S->H[5]);
+	sha512_STORE64_BE(&hash[48], S->H[6]);
+	sha512_STORE64_BE(&hash[56], S->H[7]);
+}
+
+static void
+ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen) {
+	ed25519_hash_context ctx;
+	ed25519_hash_init(&ctx);
+	ed25519_hash_update(&ctx, in, inlen);
+	ed25519_hash_final(&ctx, hash);
+}
+
+#elif defined(ED25519_CUSTOMHASH)
+
+#include "ed25519-hash-custom.h"
+
+#else
+
+#include <openssl/sha.h>
+
+typedef SHA512_CTX ed25519_hash_context;
+
+static void
+ed25519_hash_init(ed25519_hash_context *ctx) {
+	SHA512_Init(ctx);
+}
+
+static void
+ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen) {
+	SHA512_Update(ctx, in, inlen);
+}
+
+static void
+ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash) {
+	SHA512_Final(hash, ctx);
+}
+
+static void
+ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen) {
+	SHA512(in, inlen, hash);
+}
+
+#endif
+

src/external/ed25519-donna/ed25519-randombytes-custom.h

@@ -0,0 +1,8 @@
+/*
+	a custom randombytes must implement:
+
+	void ED25519_FN(ed25519_randombytes_unsafe) (void *p, size_t len);
+
+	ed25519_randombytes_unsafe is used by the batch verification function
+	to create random scalars
+*/

src/external/ed25519-donna/ed25519-randombytes.h

@@ -0,0 +1,91 @@
+#if defined(ED25519_TEST)
+/*
+	ISAAC+ "variant", the paper is not clear on operator precedence and other
+	things. This is the "first in, first out" option!
+
+	Not threadsafe or securely initialized, only for deterministic testing
+*/
+typedef struct isaacp_state_t {
+	uint32_t state[256];
+	unsigned char buffer[1024];
+	uint32_t a, b, c;
+	size_t left;
+} isaacp_state;
+
+#define isaacp_step(offset, mix) \
+	x = mm[i + offset]; \
+	a = (a ^ (mix)) + (mm[(i + offset + 128) & 0xff]); \
+	y = (a ^ b) + mm[(x >> 2) & 0xff]; \
+	mm[i + offset] = y; \
+	b = (x + a) ^ mm[(y >> 10) & 0xff]; \
+	U32TO8_LE(out + (i + offset) * 4, b);
+
+static void
+isaacp_mix(isaacp_state *st) {
+	uint32_t i, x, y;
+	uint32_t a = st->a, b = st->b, c = st->c;
+	uint32_t *mm = st->state;
+	unsigned char *out = st->buffer;
+
+	c = c + 1;
+	b = b + c;
+
+	for (i = 0; i < 256; i += 4) {
+		isaacp_step(0, ROTL32(a,13))
+		isaacp_step(1, ROTR32(a, 6))
+		isaacp_step(2, ROTL32(a, 2))
+		isaacp_step(3, ROTR32(a,16))
+	}
+
+	st->a = a;
+	st->b = b;
+	st->c = c;
+	st->left = 1024;
+}
+
+static void
+isaacp_random(isaacp_state *st, void *p, size_t len) {
+	size_t use;
+	unsigned char *c = (unsigned char *)p;
+	while (len) {
+		use = (len > st->left) ? st->left : len;
+		memcpy(c, st->buffer + (sizeof(st->buffer) - st->left), use);
+
+		st->left -= use;
+		c += use;
+		len -= use;
+
+		if (!st->left)
+			isaacp_mix(st);
+	}
+}
+
+void
+ED25519_FN(ed25519_randombytes_unsafe) (void *p, size_t len) {
+	static int initialized = 0;
+	static isaacp_state rng;
+
+	if (!initialized) {
+		memset(&rng, 0, sizeof(rng));
+		isaacp_mix(&rng);
+		isaacp_mix(&rng);
+		initialized = 1;
+	}
+
+	isaacp_random(&rng, p, len);
+}
+#elif defined(ED25519_CUSTOMRNG)
+
+#include "ed25519-randombytes-custom.h"
+
+#else
+
+#include <openssl/rand.h>
+
+void
+ED25519_FN(ed25519_randombytes_unsafe) (void *p, size_t len) {
+
+  RAND_bytes(p, (int) len);
+
+}
+#endif

src/external/ed25519-donna/ed25519.c

@@ -0,0 +1,150 @@
+/*
+	Public domain by Andrew M. <liquidsun@gmail.com>
+
+	Ed25519 reference implementation using Ed25519-donna
+*/
+
+
+/* define ED25519_SUFFIX to have it appended to the end of each public function */
+#if !defined(ED25519_SUFFIX)
+#define ED25519_SUFFIX 
+#endif
+
+#define ED25519_FN3(fn,suffix) fn##suffix
+#define ED25519_FN2(fn,suffix) ED25519_FN3(fn,suffix)
+#define ED25519_FN(fn)         ED25519_FN2(fn,ED25519_SUFFIX)
+
+#include "ed25519-donna.h"
+#include "ed25519.h"
+#include "ed25519-randombytes.h"
+#include "ed25519-hash.h"
+
+/*
+	Generates a (extsk[0..31]) and aExt (extsk[32..63])
+*/
+
+DONNA_INLINE static void
+ed25519_extsk(hash_512bits extsk, const ed25519_secret_key sk) {
+	ed25519_hash(extsk, sk, 32);
+	extsk[0] &= 248;
+	extsk[31] &= 127;
+	extsk[31] |= 64;
+}
+
+static void
+ed25519_hram(hash_512bits hram, const ed25519_signature RS, const ed25519_public_key pk, const unsigned char *m, size_t mlen) {
+	ed25519_hash_context ctx;
+	ed25519_hash_init(&ctx);
+	ed25519_hash_update(&ctx, RS, 32);
+	ed25519_hash_update(&ctx, pk, 32);
+	ed25519_hash_update(&ctx, m, mlen);
+	ed25519_hash_final(&ctx, hram);
+}
+
+void
+ED25519_FN(ed25519_publickey) (const ed25519_secret_key sk, ed25519_public_key pk) {
+	bignum256modm a;
+	ge25519 ALIGN(16) A;
+	hash_512bits extsk;
+
+	/* A = aB */
+	ed25519_extsk(extsk, sk);
+	expand256_modm(a, extsk, 32);
+	ge25519_scalarmult_base_niels(&A, ge25519_niels_base_multiples, a);
+	ge25519_pack(pk, &A);
+}
+
+
+void
+ED25519_FN(ed25519_sign) (const unsigned char *m, size_t mlen, const ed25519_secret_key sk, const ed25519_public_key pk, ed25519_signature RS) {
+	ed25519_hash_context ctx;
+	bignum256modm r, S, a;
+	ge25519 ALIGN(16) R;
+	hash_512bits extsk, hashr, hram;
+
+	ed25519_extsk(extsk, sk);
+
+	/* r = H(aExt[32..64], m) */
+	ed25519_hash_init(&ctx);
+	ed25519_hash_update(&ctx, extsk + 32, 32);
+	ed25519_hash_update(&ctx, m, mlen);
+	ed25519_hash_final(&ctx, hashr);
+	expand256_modm(r, hashr, 64);
+
+	/* R = rB */
+	ge25519_scalarmult_base_niels(&R, ge25519_niels_base_multiples, r);
+	ge25519_pack(RS, &R);
+
+	/* S = H(R,A,m).. */
+	ed25519_hram(hram, RS, pk, m, mlen);
+	expand256_modm(S, hram, 64);
+
+	/* S = H(R,A,m)a */
+	expand256_modm(a, extsk, 32);
+	mul256_modm(S, S, a);
+
+	/* S = (r + H(R,A,m)a) */
+	add256_modm(S, S, r);
+
+	/* S = (r + H(R,A,m)a) mod L */	
+	contract256_modm(RS + 32, S);
+}
+
+int
+ED25519_FN(ed25519_sign_open) (const unsigned char *m, size_t mlen, const ed25519_public_key pk, const ed25519_signature RS) {
+	ge25519 ALIGN(16) R, A;
+	hash_512bits hash;
+	bignum256modm hram, S;
+	unsigned char checkR[32];
+
+	if ((RS[63] & 224) || !ge25519_unpack_negative_vartime(&A, pk))
+		return -1;
+
+	/* hram = H(R,A,m) */
+	ed25519_hram(hash, RS, pk, m, mlen);
+	expand256_modm(hram, hash, 64);
+
+	/* S */
+	expand256_modm(S, RS + 32, 32);
+
+	/* SB - H(R,A,m)A */
+	ge25519_double_scalarmult_vartime(&R, &A, hram, S);
+	ge25519_pack(checkR, &R);
+
+	/* check that R = SB - H(R,A,m)A */
+	return ed25519_verify(RS, checkR, 32) ? 0 : -1;
+}
+
+#include "ed25519-donna-batchverify.h"
+
+/*
+	Fast Curve25519 basepoint scalar multiplication
+*/
+
+void
+ED25519_FN(curved25519_scalarmult_basepoint) (curved25519_key pk, const curved25519_key e) {
+	curved25519_key ec;
+	bignum256modm s;
+	bignum25519 ALIGN(16) yplusz, zminusy;
+	ge25519 ALIGN(16) p;
+	size_t i;
+
+	/* clamp */
+	for (i = 0; i < 32; i++) ec[i] = e[i];
+	ec[0] &= 248;
+	ec[31] &= 127;
+	ec[31] |= 64;
+
+	expand_raw256_modm(s, ec);
+
+	/* scalar * basepoint */
+	ge25519_scalarmult_base_niels(&p, ge25519_niels_base_multiples, s);
+
+	/* u = (y + z) / (z - y) */
+	curve25519_add(yplusz, p.y, p.z);
+	curve25519_sub(zminusy, p.z, p.y);
+	curve25519_recip(zminusy, zminusy);
+	curve25519_mul(yplusz, yplusz, zminusy);
+	curve25519_contract(pk, yplusz);
+}
+

src/external/ed25519-donna/ed25519.h

@@ -0,0 +1,23 @@
+#ifndef ED25519_H
+#define ED25519_H
+
+#include <stdlib.h>
+
+typedef unsigned char ed25519_signature[64];
+typedef unsigned char ed25519_public_key[32];
+typedef unsigned char ed25519_secret_key[32];
+
+typedef unsigned char curved25519_key[32];
+
+void ed25519_publickey(const ed25519_secret_key sk, ed25519_public_key pk);
+int ed25519_sign_open(const unsigned char *m, size_t mlen, const ed25519_public_key pk, const ed25519_signature RS);
+void ed25519_sign(const unsigned char *m, size_t mlen, const ed25519_secret_key sk, const ed25519_public_key pk, ed25519_signature RS);
+
+int ed25519_sign_open_batch(const unsigned char **m, size_t *mlen, const unsigned char **pk, const unsigned char **RS, size_t num, int *valid);
+
+void ed25519_randombytes_unsafe(void *out, size_t count);
+
+void curved25519_scalarmult_basepoint(curved25519_key pk, const curved25519_key e);
+
+
+#endif // ED25519_H

src/external/ed25519-donna/ed25519_VALVE.c

@@ -0,0 +1,412 @@
+/*========= Copyright Valve Corporation, All rights reserved =======================*/
+
+
+#include <stdlib.h> /* for size_t */
+
+#define ED25519_CUSTOMRNG
+
+#if !defined(ENABLE_OPENSSLCONNECTION) && !defined(HAVE_OPENSSL)
+
+#define ED25519_CUSTOMHASH
+
+#include <string.h>
+#define LTC_ARGCHK(a)
+#define CRYPT_OK 0
+#define CRYPT_INVALID_ARG -1
+#define MIN(a,b) (((a)<(b))?(a):(b))
+typedef unsigned int ulong32;
+typedef unsigned char uint8_t;
+
+/* HERE FOLLOWS AN INLINED VERSION OF SHA512 (SHA-2) FROM PUBLIC DOMAIN LIBTOMCRYPT
+   with necessary definitions collapsed into one file, and all functions marked static
+
+   libTomCrypt v1.17 source downloaded 12/12/2013 from http://libtom.org/  */
+
+
+/* fix for MSVC ...evil! */
+#ifdef _MSC_VER
+#define CONST64(n) n ## ui64
+typedef unsigned __int64 ulong64;
+#else
+#define CONST64(n) n ## ULL
+typedef unsigned long long ulong64;
+#endif
+
+struct sha512_state {
+    ulong64  length, state[8];
+    unsigned long curlen;
+    unsigned char buf[128];
+};
+
+typedef union Hash_state {
+	struct sha512_state sha512;
+} hash_state;
+
+
+#if !defined(LTC_NO_BSWAP) && (defined(__GNUC__) && defined(__x86_64__))
+
+#define STORE64H(x, y)           \
+	asm __volatile__( \
+	"bswapq %0     \n\t"          \
+	"movq   %0,(%1)\n\t"          \
+	"bswapq %0     \n\t"          \
+	::"r"(x), "r"(y) );
+
+#define LOAD64H(x, y)          \
+	asm __volatile__( \
+	"movq (%1),%0\n\t"          \
+	"bswapq %0\n\t"             \
+	:"=r"(x) : "r"(y) );
+
+#else
+
+#define STORE64H(x, y)                                                                     \
+{ (y)[0] = (unsigned char)(((x) >> 56) & 255); (y)[1] = (unsigned char)(((x) >> 48) & 255);     \
+	(y)[2] = (unsigned char)(((x) >> 40) & 255); (y)[3] = (unsigned char)(((x) >> 32) & 255);     \
+	(y)[4] = (unsigned char)(((x) >> 24) & 255); (y)[5] = (unsigned char)(((x) >> 16) & 255);     \
+	(y)[6] = (unsigned char)(((x) >> 8) & 255); (y)[7] = (unsigned char)((x)& 255); }
+
+#define LOAD64H(x, y)                                                      \
+{ x = (((ulong64)((y)[0] & 255)) << 56) | (((ulong64)((y)[1] & 255)) << 48) | \
+	(((ulong64)((y)[2] & 255)) << 40) | (((ulong64)((y)[3] & 255)) << 32) | \
+	(((ulong64)((y)[4] & 255)) << 24) | (((ulong64)((y)[5] & 255)) << 16) | \
+	(((ulong64)((y)[6] & 255)) << 8) | (((ulong64)((y)[7] & 255))); }
+
+#endif
+
+
+// 64-bit Rotates
+#if !defined(__STRICT_ANSI__) && defined(__GNUC__) && defined(__x86_64__) && !defined(LTC_NO_ASM)
+
+#define ROL64c(word, i) ({     \
+   unsigned  long _word = word;    \
+   asm ("roll %2,%0"         \
+	  :"=r" (_word)          \
+	  :"0" (_word),"J" (i)); \
+   _word; })
+
+#define ROR64c(word, i) ({     \
+   unsigned long _word = word;    \
+   asm ("rorq %2,%0"         \
+	  :"=r" (_word)          \
+	  :"0" (_word),"J" (i)); \
+   _word; })
+
+#else // Not x86_64
+
+#define ROL64c(x, y) \
+    ( (((x)<<((ulong64)(y)&63)) | \
+      (((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((ulong64)64-((y)&63)))) & CONST64(0xFFFFFFFFFFFFFFFF))
+
+#define ROR64c(x, y) \
+    ( ((((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((ulong64)(y)&CONST64(63))) | \
+      ((x)<<((ulong64)(64-((y)&CONST64(63)))))) & CONST64(0xFFFFFFFFFFFFFFFF))
+
+#endif
+
+
+/* a simple macro for making hash "process" functions */
+#define HASH_PROCESS(func_name, compress_name, state_var, block_size)                       \
+int func_name (hash_state * md, const unsigned char *in, unsigned long inlen)               \
+{                                                                                           \
+    unsigned long n;                                                                        \
+    int           err;                                                                      \
+    LTC_ARGCHK(md != NULL);                                                                 \
+    LTC_ARGCHK(in != NULL);                                                                 \
+    if (md-> state_var .curlen > sizeof(md-> state_var .buf)) {                             \
+       return CRYPT_INVALID_ARG;                                                            \
+    }                                                                                       \
+    while (inlen > 0) {                                                                     \
+        if (md-> state_var .curlen == 0 && inlen >= block_size) {                           \
+           if ((err = compress_name (md, (unsigned char *)in)) != CRYPT_OK) {               \
+              return err;                                                                   \
+           }                                                                                \
+           md-> state_var .length += block_size * 8;                                        \
+           in             += block_size;                                                    \
+           inlen          -= block_size;                                                    \
+        } else {                                                                            \
+           n = MIN(inlen, (block_size - md-> state_var .curlen));                           \
+           memcpy(md-> state_var .buf + md-> state_var.curlen, in, (size_t)n);              \
+           md-> state_var .curlen += n;                                                     \
+           in             += n;                                                             \
+           inlen          -= n;                                                             \
+           if (md-> state_var .curlen == block_size) {                                      \
+              if ((err = compress_name (md, md-> state_var .buf)) != CRYPT_OK) {            \
+                 return err;                                                                \
+              }                                                                             \
+              md-> state_var .length += 8*block_size;                                       \
+              md-> state_var .curlen = 0;                                                   \
+           }                                                                                \
+       }                                                                                    \
+    }                                                                                       \
+    return CRYPT_OK;                                                                        \
+}
+
+/* the K array */
+static const ulong64 K[80] = {
+CONST64(0x428a2f98d728ae22), CONST64(0x7137449123ef65cd), 
+CONST64(0xb5c0fbcfec4d3b2f), CONST64(0xe9b5dba58189dbbc),
+CONST64(0x3956c25bf348b538), CONST64(0x59f111f1b605d019), 
+CONST64(0x923f82a4af194f9b), CONST64(0xab1c5ed5da6d8118),
+CONST64(0xd807aa98a3030242), CONST64(0x12835b0145706fbe), 
+CONST64(0x243185be4ee4b28c), CONST64(0x550c7dc3d5ffb4e2),
+CONST64(0x72be5d74f27b896f), CONST64(0x80deb1fe3b1696b1), 
+CONST64(0x9bdc06a725c71235), CONST64(0xc19bf174cf692694),
+CONST64(0xe49b69c19ef14ad2), CONST64(0xefbe4786384f25e3), 
+CONST64(0x0fc19dc68b8cd5b5), CONST64(0x240ca1cc77ac9c65),
+CONST64(0x2de92c6f592b0275), CONST64(0x4a7484aa6ea6e483), 
+CONST64(0x5cb0a9dcbd41fbd4), CONST64(0x76f988da831153b5),
+CONST64(0x983e5152ee66dfab), CONST64(0xa831c66d2db43210), 
+CONST64(0xb00327c898fb213f), CONST64(0xbf597fc7beef0ee4),
+CONST64(0xc6e00bf33da88fc2), CONST64(0xd5a79147930aa725), 
+CONST64(0x06ca6351e003826f), CONST64(0x142929670a0e6e70),
+CONST64(0x27b70a8546d22ffc), CONST64(0x2e1b21385c26c926), 
+CONST64(0x4d2c6dfc5ac42aed), CONST64(0x53380d139d95b3df),
+CONST64(0x650a73548baf63de), CONST64(0x766a0abb3c77b2a8), 
+CONST64(0x81c2c92e47edaee6), CONST64(0x92722c851482353b),
+CONST64(0xa2bfe8a14cf10364), CONST64(0xa81a664bbc423001),
+CONST64(0xc24b8b70d0f89791), CONST64(0xc76c51a30654be30),
+CONST64(0xd192e819d6ef5218), CONST64(0xd69906245565a910), 
+CONST64(0xf40e35855771202a), CONST64(0x106aa07032bbd1b8),
+CONST64(0x19a4c116b8d2d0c8), CONST64(0x1e376c085141ab53), 
+CONST64(0x2748774cdf8eeb99), CONST64(0x34b0bcb5e19b48a8),
+CONST64(0x391c0cb3c5c95a63), CONST64(0x4ed8aa4ae3418acb), 
+CONST64(0x5b9cca4f7763e373), CONST64(0x682e6ff3d6b2b8a3),
+CONST64(0x748f82ee5defb2fc), CONST64(0x78a5636f43172f60), 
+CONST64(0x84c87814a1f0ab72), CONST64(0x8cc702081a6439ec),
+CONST64(0x90befffa23631e28), CONST64(0xa4506cebde82bde9), 
+CONST64(0xbef9a3f7b2c67915), CONST64(0xc67178f2e372532b),
+CONST64(0xca273eceea26619c), CONST64(0xd186b8c721c0c207), 
+CONST64(0xeada7dd6cde0eb1e), CONST64(0xf57d4f7fee6ed178),
+CONST64(0x06f067aa72176fba), CONST64(0x0a637dc5a2c898a6), 
+CONST64(0x113f9804bef90dae), CONST64(0x1b710b35131c471b),
+CONST64(0x28db77f523047d84), CONST64(0x32caab7b40c72493), 
+CONST64(0x3c9ebe0a15c9bebc), CONST64(0x431d67c49c100d4c),
+CONST64(0x4cc5d4becb3e42b6), CONST64(0x597f299cfc657e2a), 
+CONST64(0x5fcb6fab3ad6faec), CONST64(0x6c44198c4a475817)
+};
+
+/* Various logical functions */
+#define Ch(x,y,z)       (z ^ (x & (y ^ z)))
+#define Maj(x,y,z)      (((x | y) & z) | (x & y)) 
+#define S(x, n)         ROR64c(x, n)
+#define R(x, n)         (((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((ulong64)n))
+#define Sigma0(x)       (S(x, 28) ^ S(x, 34) ^ S(x, 39))
+#define Sigma1(x)       (S(x, 14) ^ S(x, 18) ^ S(x, 41))
+#define Gamma0(x)       (S(x, 1) ^ S(x, 8) ^ R(x, 7))
+#define Gamma1(x)       (S(x, 19) ^ S(x, 61) ^ R(x, 6))
+
+/* compress 1024-bits */
+#ifdef LTC_CLEAN_STACK
+static int _sha512_compress(hash_state * md, unsigned char *buf)
+#else
+static int  sha512_compress(hash_state * md, unsigned char *buf)
+#endif
+{
+    ulong64 S[8], W[80], t0, t1;
+    int i;
+
+    /* copy state into S */
+    for (i = 0; i < 8; i++) {
+        S[i] = md->sha512.state[i];
+    }
+
+    /* copy the state into 1024-bits into W[0..15] */
+    for (i = 0; i < 16; i++) {
+        LOAD64H(W[i], buf + (8*i));
+    }
+
+    /* fill W[16..79] */
+    for (i = 16; i < 80; i++) {
+        W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
+    }        
+
+    /* Compress */
+#ifdef LTC_SMALL_CODE
+    for (i = 0; i < 80; i++) {
+        t0 = S[7] + Sigma1(S[4]) + Ch(S[4], S[5], S[6]) + K[i] + W[i];
+        t1 = Sigma0(S[0]) + Maj(S[0], S[1], S[2]);
+        S[7] = S[6];
+        S[6] = S[5];
+        S[5] = S[4];
+        S[4] = S[3] + t0;
+        S[3] = S[2];
+        S[2] = S[1];
+        S[1] = S[0];
+        S[0] = t0 + t1;
+    }
+#else
+#define RND(a,b,c,d,e,f,g,h,i)                    \
+     t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i];   \
+     t1 = Sigma0(a) + Maj(a, b, c);                  \
+     d += t0;                                        \
+     h  = t0 + t1;
+
+     for (i = 0; i < 80; i += 8) {
+         RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0);
+         RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1);
+         RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2);
+         RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3);
+         RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4);
+         RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5);
+         RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6);
+         RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7);
+     }
+#endif     
+
+
+    /* feedback */
+    for (i = 0; i < 8; i++) {
+        md->sha512.state[i] = md->sha512.state[i] + S[i];
+    }
+
+    return CRYPT_OK;
+}
+
+/* compress 1024-bits */
+#ifdef LTC_CLEAN_STACK
+static int sha512_compress(hash_state * md, unsigned char *buf)
+{
+    int err;
+    err = _sha512_compress(md, buf);
+    burn_stack(sizeof(ulong64) * 90 + sizeof(int));
+    return err;
+}
+#endif
+
+/**
+   Initialize the hash state
+   @param md   The hash state you wish to initialize
+   @return CRYPT_OK if successful
+*/
+static int sha512_init(hash_state * md)
+{
+    LTC_ARGCHK(md != NULL);
+    md->sha512.curlen = 0;
+    md->sha512.length = 0;
+    md->sha512.state[0] = CONST64(0x6a09e667f3bcc908);
+    md->sha512.state[1] = CONST64(0xbb67ae8584caa73b);
+    md->sha512.state[2] = CONST64(0x3c6ef372fe94f82b);
+    md->sha512.state[3] = CONST64(0xa54ff53a5f1d36f1);
+    md->sha512.state[4] = CONST64(0x510e527fade682d1);
+    md->sha512.state[5] = CONST64(0x9b05688c2b3e6c1f);
+    md->sha512.state[6] = CONST64(0x1f83d9abfb41bd6b);
+    md->sha512.state[7] = CONST64(0x5be0cd19137e2179);
+    return CRYPT_OK;
+}
+
+/**
+   Process a block of memory though the hash
+   @param md     The hash state
+   @param in     The data to hash
+   @param inlen  The length of the data (octets)
+   @return CRYPT_OK if successful
+*/
+static HASH_PROCESS(sha512_process, sha512_compress, sha512, 128)
+
+/**
+   Terminate the hash to get the digest
+   @param md  The hash state
+   @param out [out] The destination of the hash (64 bytes)
+   @return CRYPT_OK if successful
+*/
+static int sha512_done(hash_state * md, unsigned char *out)
+{
+    int i;
+
+    LTC_ARGCHK(md  != NULL);
+    LTC_ARGCHK(out != NULL);
+
+    if (md->sha512.curlen >= sizeof(md->sha512.buf)) {
+       return CRYPT_INVALID_ARG;
+    }
+
+    /* increase the length of the message */
+    md->sha512.length += md->sha512.curlen * CONST64(8);
+
+    /* append the '1' bit */
+    md->sha512.buf[md->sha512.curlen++] = (unsigned char)0x80;
+
+    /* if the length is currently above 112 bytes we append zeros
+     * then compress.  Then we can fall back to padding zeros and length
+     * encoding like normal.
+     */
+    if (md->sha512.curlen > 112) {
+        while (md->sha512.curlen < 128) {
+            md->sha512.buf[md->sha512.curlen++] = (unsigned char)0;
+        }
+        sha512_compress(md, md->sha512.buf);
+        md->sha512.curlen = 0;
+    }
+
+    /* pad upto 120 bytes of zeroes 
+     * note: that from 112 to 120 is the 64 MSB of the length.  We assume that you won't hash
+     * > 2^64 bits of data... :-)
+     */
+    while (md->sha512.curlen < 120) {
+        md->sha512.buf[md->sha512.curlen++] = (unsigned char)0;
+    }
+
+    /* store length */
+    STORE64H(md->sha512.length, md->sha512.buf+120);
+    sha512_compress(md, md->sha512.buf);
+
+    /* copy output */
+    for (i = 0; i < 8; i++) {
+        STORE64H(md->sha512.state[i], out+(8*i));
+    }
+#ifdef LTC_CLEAN_STACK
+    zeromem(md, sizeof(hash_state));
+#endif
+    return CRYPT_OK;
+}
+
+/* END OF SHA512 IMPLEMENTATION FROM PUBLIC DOMAIN LIBTOMCRYPT */
+
+typedef hash_state ed25519_hash_context;
+static void ed25519_hash_init( ed25519_hash_context *ctx ) { sha512_init( ctx ); }
+static void ed25519_hash_update( ed25519_hash_context *ctx, const uint8_t *in, size_t inlen ) { sha512_process( ctx, in, (unsigned long)inlen ); }
+static void ed25519_hash_final( ed25519_hash_context *ctx, uint8_t *hash ) { sha512_done( ctx, hash ); }
+static void ed25519_hash( uint8_t *hash, const uint8_t *in, size_t inlen ) { ed25519_hash_context ctx; sha512_init(&ctx); sha512_process(&ctx, in, (unsigned long)inlen); sha512_done(&ctx,hash); }
+
+#endif
+
+
+
+#ifdef _WIN32
+/* Win32 always has RtlGenRandom to act as an entropy source for ed25519_sign_open_batch */
+
+#ifndef NO_ED25519_RANDOMBYTES_IMPL
+#define WIN32_LEAN_AND_MEAN
+#define NOGDI
+#include <windows.h>
+void ed25519_randombytes_unsafe(void *p, size_t len) {
+	// the Microsoft CRT imports RtlGenRandom as a direct link to SystemFunction036 in advapi32.dll
+	// so we can safely do the same - it can never be removed without breaking all VC2010 apps.
+	static BOOLEAN (WINAPI *pfnRtlGenRandom)( void *, unsigned long );
+	if ( !pfnRtlGenRandom ) {
+		pfnRtlGenRandom = ( BOOLEAN (WINAPI *)( void *, unsigned long ) ) GetProcAddress( LoadLibraryA("advapi32.dll"), "SystemFunction036" );
+	}
+	(*pfnRtlGenRandom)( p, (unsigned long) len );
+}
+#endif
+
+#else
+
+/* Other platforms - ed25519_sign_open_batch will explode without an entropy source;
+   remap the function name so that linking will fail, rather than exploding at runtime */
+#define ed25519_sign_open_batch ed25519_sign_open_batch_DO_NOT_USE
+
+#ifndef NO_ED25519_RANDOMBYTES_IMPL
+void ed25519_randombytes_unsafe(void *p, size_t len) { /*boom*/ *(volatile int*)0 = 1; }
+#endif
+
+#endif
+
+/* On OSX, our clang doesn't seem to handle uint128_t properly - 32-bit + SSE2 is almost as good. */
+#if defined(__clang__) && defined(__x86_64__)
+#define ED25519_FORCE_32BIT
+#define ED25519_SSE2
+#endif
+
+#include "ed25519.c"

src/external/ed25519-donna/ed25519_VALVE_sse2.c

@@ -0,0 +1,14 @@
+/*========= Copyright © Valve Corporation, All rights reserved =======================*/
+
+
+#define ED25519_SSE2
+#define ED25519_SUFFIX _sse2
+
+/* hackery to avoid double-definitions of functions */
+#define NO_ED25519_RANDOMBYTES_IMPL
+#define ed25519_randombytes_unsafe_sse2 ed25519_randombytes_unsafe
+
+/* hackery to avoid double-definitions of global test buffer */
+#define batch_point_buffer test_batch_point_buffer_sse2
+
+#include "ed25519_VALVE.c"

src/external/ed25519-donna/fuzz/README.md

@@ -0,0 +1,173 @@
+This code fuzzes ed25519-donna (and optionally ed25519-donna-sse2) against the ref10 implementations of
+[curve25519](https://github.com/floodyberry/supercop/tree/master/crypto_scalarmult/curve25519/ref10) and 
+[ed25519](https://github.com/floodyberry/supercop/tree/master/crypto_sign/ed25519/ref10).
+
+Curve25519 tests that generating a public key from a secret key
+
+# Building
+
+## *nix + PHP
+
+`php build-nix.php (required parameters) (optional parameters)`
+
+Required parameters:
+
+* `--function=[curve25519,ed25519]`
+* `--bits=[32,64]`
+
+Optional parameters:
+
+* `--with-sse2`
+
+    Also fuzz against ed25519-donna-sse2
+* `--with-openssl`
+
+    Build with OpenSSL's SHA-512.
+
+    Default: Reference SHA-512 implementation (slow!)
+
+* `--compiler=[gcc,clang,icc]`
+
+    Default: gcc
+
+* `--no-asm`
+
+    Do not use platform specific assembler
+
+
+example:
+    
+    php build-nix.php --bits=64 --function=ed25519 --with-sse2 --compiler=icc 
+
+## Windows
+
+Create a project with access to the ed25519 files.
+
+If you are not using OpenSSL, add the `ED25519_REFHASH` define to the projects 
+"Properties/Preprocessor/Preprocessor Definitions" option
+
+Add the following files to the project:
+
+* `fuzz/curve25519-ref10.c`
+* `fuzz/ed25519-ref10.c`
+* `fuzz/ed25519-donna.c`
+* `fuzz/ed25519-donna-sse2.c` (optional)
+* `fuzz-[curve25519/ed25519].c` (depending on which you want to fuzz)
+
+If you are also fuzzing against ed25519-donna-sse2, add the `ED25519_SSE2` define for `fuzz-[curve25519/ed25519].c` under 
+its "Properties/Preprocessor/Preprocessor Definitions" option.
+
+# Running
+
+If everything agrees, the program will only output occasional status dots (every 0x1000 passes) 
+and a 64bit progress count (every 0x20000 passes):
+
+    fuzzing:  ref10 curved25519 curved25519-sse2
+    
+    ................................ [0000000000020000]
+    ................................ [0000000000040000]
+    ................................ [0000000000060000]
+    ................................ [0000000000080000]
+    ................................ [00000000000a0000]
+    ................................ [00000000000c0000]
+ 
+If any of the implementations do not agree with the ref10 implementation, the program will dump
+the random data that was used, the data generated by the ref10 implementation, and diffs of the 
+ed25519-donna data against the ref10 data.
+
+## Example errors
+
+These are example error dumps (with intentionally introduced errors).
+
+### Ed25519
+
+Random data:
+
+* sk, or Secret Key
+* m, or Message
+
+Generated data:
+
+* pk, or Public Key
+* sig, or Signature
+* valid, or if the signature of the message is valid with the public key
+
+Dump:
+
+    sk:
+    0x3b,0xb7,0x17,0x7a,0x66,0xdc,0xb7,0x9a,0x90,0x25,0x07,0x99,0x96,0xf3,0x92,0xef,
+    0x78,0xf8,0xad,0x6c,0x35,0x87,0x81,0x67,0x03,0xe6,0x95,0xba,0x06,0x18,0x7c,0x9c,
+    
+    m:
+    0x7c,0x8d,0x3d,0xe1,0x92,0xee,0x7a,0xb8,0x4d,0xc9,0xfb,0x02,0x34,0x1e,0x5a,0x91,
+    0xee,0x01,0xa6,0xb8,0xab,0x37,0x3f,0x3d,0x6d,0xa2,0x47,0xe3,0x27,0x93,0x7c,0xb7,
+    0x77,0x07,0xb6,0x88,0x41,0x22,0xf3,0x3f,0xce,0xcb,0x6b,0x3e,0x2b,0x23,0x68,0x7f,
+    0x5b,0xb9,0xda,0x04,0xbb,0xae,0x42,0x50,0xf5,0xe9,0xc5,0x11,0xbd,0x52,0x76,0x98,
+    0xf1,0x87,0x09,0xb9,0x89,0x0a,0x52,0x69,0x01,0xce,0xe0,0x4a,0xa6,0x46,0x5a,0xe1,
+    0x63,0x14,0xe0,0x81,0x52,0xec,0xcd,0xcf,0x70,0x54,0x7d,0xa3,0x49,0x8b,0xf0,0x89,
+    0x70,0x07,0x12,0x2a,0xd9,0xaa,0x16,0x01,0xb2,0x16,0x3a,0xbb,0xfc,0xfa,0x13,0x5b,
+    0x69,0x83,0x92,0x70,0x95,0x76,0xa0,0x8e,0x16,0x79,0xcc,0xaa,0xb5,0x7c,0xf8,0x7a,
+    
+    ref10:
+    pk:
+    0x71,0xb0,0x5e,0x62,0x1b,0xe3,0xe7,0x36,0x91,0x8b,0xc0,0x13,0x36,0x0c,0xc9,0x04,
+    0x16,0xf5,0xff,0x48,0x0c,0x83,0x6b,0x88,0x53,0xa2,0xc6,0x0f,0xf7,0xac,0x42,0x04,
+    
+    sig:
+    0x3e,0x05,0xc5,0x37,0x16,0x0b,0x29,0x30,0x89,0xa3,0xe7,0x83,0x08,0x16,0xdd,0x96,
+    0x02,0xfa,0x0d,0x44,0x2c,0x43,0xaa,0x80,0x93,0x04,0x58,0x22,0x09,0xbf,0x11,0xa5,
+    0xcc,0xa5,0x3c,0x9f,0xa0,0xa4,0x64,0x5a,0x4a,0xdb,0x20,0xfb,0xc7,0x9b,0xfd,0x3f,
+    0x08,0xae,0xc4,0x3c,0x1e,0xd8,0xb6,0xb4,0xd2,0x6d,0x80,0x92,0xcb,0x71,0xf3,0x02,
+    
+    valid: yes
+    
+    ed25519-donna:
+    pk diff:
+    ____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,
+    ____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,
+    
+    sig diff:
+    0x2c,0xb9,0x25,0x14,0xd0,0x94,0xeb,0xfe,0x46,0x02,0xc2,0xe8,0xa3,0xeb,0xbf,0xb5,
+    0x72,0x84,0xbf,0xc1,0x8a,0x32,0x30,0x99,0xf7,0x58,0xfe,0x06,0xa8,0xdc,0xdc,0xab,
+    0xb5,0x57,0x03,0x33,0x87,0xce,0x54,0x55,0x6a,0x69,0x8a,0xc4,0xb7,0x2a,0xed,0x97,
+    0xb4,0x68,0xe7,0x52,0x7a,0x07,0x55,0x3b,0xa2,0x94,0xd6,0x5e,0xa1,0x61,0x80,0x08,
+    
+    valid: no
+
+In this case, the generated public key matches, but the generated signature is completely 
+different and does not validate.
+
+### Curve25519
+
+Random data:
+
+* sk, or Secret Key
+
+Generated data:
+
+* pk, or Public Key
+
+Dump:
+
+    sk:
+    0x44,0xec,0x0b,0x0e,0xa2,0x0e,0x9c,0x5b,0x8c,0xce,0x7b,0x1d,0x68,0xae,0x0f,0x9e,
+    0x81,0xe2,0x04,0x76,0xda,0x87,0xa4,0x9e,0xc9,0x4f,0x3b,0xf9,0xc3,0x89,0x63,0x70,
+    
+    
+    ref10:
+    0x24,0x55,0x55,0xc0,0xf9,0x80,0xaf,0x02,0x43,0xee,0x8c,0x7f,0xc1,0xad,0x90,0x95,
+    0x57,0x91,0x14,0x2e,0xf2,0x14,0x22,0x80,0xdd,0x4e,0x3c,0x85,0x71,0x84,0x8c,0x62,
+    
+    
+    curved25519 diff:
+    0x12,0xd1,0x61,0x2b,0x16,0xb3,0xd8,0x29,0xf8,0xa3,0xba,0x70,0x4e,0x49,0x4f,0x43,
+    0xa1,0x3c,0x6b,0x42,0x11,0x61,0xcc,0x30,0x87,0x73,0x46,0xfb,0x85,0xc7,0x9a,0x35,
+    
+    
+    curved25519-sse2 diff:
+    ____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,
+    ____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,____,
+
+
+In this case, curved25519 is totally wrong, while curved25519-sse2 matches the reference 
+implementation.

src/external/ed25519-donna/fuzz/build-nix.php

@@ -0,0 +1,134 @@
+<?php
+	function echoln($str) {
+		echo $str;
+		echo "\n";
+	}
+
+	function usage($reason) {
+		echoln("Usage: php build-nix.php [flags]");
+		echoln("Flags in parantheses are optional");
+		echoln("");
+		echoln("  --bits=[32,64]");
+		echoln("  --function=[curve25519,ed25519]");
+		echoln(" (--compiler=[*gcc,clang,icc])        which compiler to use, gcc is default");
+		echoln(" (--with-openssl)                     use openssl for SHA512");
+		echoln(" (--with-sse2)                        additionally fuzz against SSE2");
+		echoln(" (--no-asm)                           don't use platform specific asm");
+		echoln("");
+		if ($reason)
+			echoln($reason);
+	}
+
+	function cleanup() {
+		system("rm -f *.o");
+	}
+
+	function runcmd($desc, $cmd) {
+		echoln($desc);
+
+		$ret = 0;
+		system($cmd, $ret);
+		if ($ret) {
+			cleanup();
+			exit;
+		}
+	}
+
+	class argument {
+		var $set, $value;
+	}
+
+	class multiargument extends argument {
+		function multiargument($flag, $legal_values) {
+			global $argc, $argv;
+
+			$this->set = false;
+
+			$map = array();
+			foreach($legal_values as $value)
+				$map[$value] = true;
+
+			for ($i = 1; $i < $argc; $i++) {
+				if (!preg_match("!--".$flag."=(.*)!", $argv[$i], $m))
+					continue;
+				if (isset($map[$m[1]])) {
+					$this->value = $m[1];
+					$this->set = true;
+					return;
+				} else {
+					usage("{$m[1]} is not a valid parameter to --{$flag}!");
+					exit(1);
+				}
+			}
+		}
+	}
+
+	class flag extends argument {
+		function flag($flag) {
+			global $argc, $argv;
+
+			$this->set = false;
+
+			$flag = "--{$flag}";
+			for ($i = 1; $i < $argc; $i++) {
+				if ($argv[$i] !== $flag)
+					continue;
+				$this->value = true;
+				$this->set = true;
+				return;
+			}
+		}
+	}
+
+	$bits = new multiargument("bits", array("32", "64"));
+	$function = new multiargument("function", array("curve25519", "ed25519"));
+	$compiler = new multiargument("compiler", array("gcc", "clang", "icc"));
+	$with_sse2 = new flag("with-sse2");
+	$with_openssl = new flag("with-openssl");
+	$no_asm = new flag("no-asm");
+
+	$err = "";
+	if (!$bits->set)
+		$err .= "--bits not set\n";
+	if (!$function->set)
+		$err .= "--function not set\n";
+
+	if ($err !== "") {
+		usage($err);
+		exit;
+	}
+
+	$compile = ($compiler->set) ? $compiler->value : "gcc";
+	$link = "";
+	$flags = "-O3 -m{$bits->value}";
+	$ret = 0;
+
+	if ($with_openssl->set) $link .= " -lssl -lcrypto";
+	if (!$with_openssl->set) $flags .= " -DED25519_REFHASH -DED25519_TEST";
+	if ($no_asm->set) $flags .= " -DED25519_NO_INLINE_ASM";
+
+	if ($function->value === "curve25519") {
+		runcmd("building ref10..", "{$compile} {$flags} curve25519-ref10.c -c -o curve25519-ref10.o");
+		runcmd("building ed25519..", "{$compile} {$flags} ed25519-donna.c -c -o ed25519.o");
+		if ($with_sse2->set) {
+			runcmd("building ed25519-sse2..", "{$compile} {$flags} ed25519-donna-sse2.c -c -o ed25519-sse2.o -msse2");
+			$flags .= " -DED25519_SSE2";
+			$link .= " ed25519-sse2.o";
+		}
+		runcmd("linking..", "{$compile} {$flags} {$link} fuzz-curve25519.c ed25519.o curve25519-ref10.o -o fuzz-curve25519");
+		echoln("fuzz-curve25519 built.");
+	} else 	if ($function->value === "ed25519") {
+		runcmd("building ref10..", "{$compile} {$flags} ed25519-ref10.c -c -o ed25519-ref10.o");
+		runcmd("building ed25519..", "{$compile} {$flags} ed25519-donna.c -c -o ed25519.o");
+		if ($with_sse2->set) {
+			runcmd("building ed25519-sse2..", "{$compile} {$flags} ed25519-donna-sse2.c -c -o ed25519-sse2.o -msse2");
+			$flags .= " -DED25519_SSE2";
+			$link .= " ed25519-sse2.o";
+		}
+		runcmd("linking..", "{$compile} {$flags} {$link} fuzz-ed25519.c ed25519.o ed25519-ref10.o -o fuzz-ed25519");
+		echoln("fuzz-ed25519 built.");
+	}
+
+
+	cleanup();
+?>

src/external/ed25519-donna/fuzz/curve25519-ref10.h

@@ -0,0 +1,8 @@
+#ifndef CURVE25519_REF10_H
+#define CURVE25519_REF10_H
+
+int crypto_scalarmult_base_ref10(unsigned char *q,const unsigned char *n);
+int crypto_scalarmult_ref10(unsigned char *q, const unsigned char *n, const unsigned char *p);
+
+#endif /* CURVE25519_REF10_H */
+

src/external/ed25519-donna/fuzz/ed25519-donna-sse2.c

@@ -0,0 +1,3 @@
+#define ED25519_SUFFIX _sse2
+#define ED25519_SSE2
+#include "../ed25519.c"

src/external/ed25519-donna/fuzz/ed25519-donna.c

@@ -0,0 +1 @@
+#include "../ed25519.c"

src/external/ed25519-donna/fuzz/ed25519-donna.h

@@ -0,0 +1,34 @@
+#ifndef ED25519_H
+#define ED25519_H
+
+#include <stdlib.h>
+
+typedef unsigned char ed25519_signature[64];
+typedef unsigned char ed25519_public_key[32];
+typedef unsigned char ed25519_secret_key[32];
+
+typedef unsigned char curved25519_key[32];
+
+void ed25519_publickey(const ed25519_secret_key sk, ed25519_public_key pk);
+int ed25519_sign_open(const unsigned char *m, size_t mlen, const ed25519_public_key pk, const ed25519_signature RS);
+void ed25519_sign(const unsigned char *m, size_t mlen, const ed25519_secret_key sk, const ed25519_public_key pk, ed25519_signature RS);
+
+int ed25519_sign_open_batch(const unsigned char **m, size_t *mlen, const unsigned char **pk, const unsigned char **RS, size_t num, int *valid);
+
+void ed25519_randombytes_unsafe(void *out, size_t count);
+
+void curved25519_scalarmult_basepoint(curved25519_key pk, const curved25519_key e);
+
+#if defined(ED25519_SSE2)
+void ed25519_publickey_sse2(const ed25519_secret_key sk, ed25519_public_key pk);
+int ed25519_sign_open_sse2(const unsigned char *m, size_t mlen, const ed25519_public_key pk, const ed25519_signature RS);
+void ed25519_sign_sse2(const unsigned char *m, size_t mlen, const ed25519_secret_key sk, const ed25519_public_key pk, ed25519_signature RS);
+
+int ed25519_sign_open_batch_sse2(const unsigned char **m, size_t *mlen, const unsigned char **pk, const unsigned char **RS, size_t num, int *valid);
+
+void ed25519_randombytes_unsafe_sse2(void *out, size_t count);
+
+void curved25519_scalarmult_basepoint_sse2(curved25519_key pk, const curved25519_key e);
+#endif
+
+#endif // ED25519_H

src/external/ed25519-donna/fuzz/ed25519-ref10.h

@@ -0,0 +1,9 @@
+#ifndef ED25519_REF10_H
+#define ED25519_REF10_H
+
+int crypto_sign_pk_ref10(unsigned char *pk,unsigned char *sk);
+int crypto_sign_ref10(unsigned char *sm,unsigned long long *smlen,const unsigned char *m,unsigned long long mlen,const unsigned char *sk);
+int crypto_sign_open_ref10(unsigned char *m,unsigned long long *mlen,const unsigned char *sm,unsigned long long smlen,const unsigned char *pk);
+
+#endif /* ED25519_REF10_H */
+

src/external/ed25519-donna/fuzz/fuzz-curve25519.c

@@ -0,0 +1,172 @@
+#if defined(_WIN32)
+	#include <windows.h>
+	#include <wincrypt.h>
+	typedef unsigned int uint32_t;
+	typedef unsigned __int64 uint64_t;
+#else
+	#include <stdint.h>
+#endif
+
+#include <string.h>
+#include <stdio.h>
+
+#include "ed25519-donna.h"
+#include "curve25519-ref10.h"
+
+static void
+print_diff(const char *desc, const unsigned char *a, const unsigned char *b, size_t len) {
+	size_t p = 0;
+	unsigned char diff;
+	printf("%s diff:\n", desc);
+	while (len--) {
+		diff = *a++ ^ *b++;
+		if (!diff)
+			printf("____,");
+		else
+			printf("0x%02x,", diff);
+		if ((++p & 15) == 0)
+			printf("\n");
+	}
+	printf("\n\n");
+}
+
+static void
+print_bytes(const char *desc, const unsigned char *bytes, size_t len) {
+	size_t p = 0;
+	printf("%s:\n", desc);
+	while (len--) {
+		printf("0x%02x,", *bytes++);
+		if ((++p & 15) == 0)
+			printf("\n");
+	}
+	printf("\n\n");
+}
+
+
+/* chacha20/12 prng */
+void
+prng(unsigned char *out, size_t bytes) {
+	static uint32_t state[16];
+	static int init = 0;
+	uint32_t x[16], t;
+	size_t i;
+
+	if (!init) {
+	#if defined(_WIN32)
+		HCRYPTPROV csp;
+		if (!CryptAcquireContext(&csp, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
+			printf("CryptAcquireContext failed\n");
+			exit(1);
+		}
+		if (!CryptGenRandom(csp, (DWORD)sizeof(state), (BYTE*)state)) {
+			printf("CryptGenRandom failed\n");
+			exit(1);
+		}
+		CryptReleaseContext(csp, 0);
+	#else
+		FILE *f = NULL;
+		f = fopen("/dev/urandom", "rb");
+		if (!f) {
+			printf("failed to open /dev/urandom\n");
+			exit(1);
+		}
+		if (fread(state, sizeof(state), 1, f) != 1) {
+			printf("read error on /dev/urandom\n");
+			exit(1);
+		}
+	#endif
+		init = 1;
+	}
+
+	while (bytes) {
+		for (i = 0; i < 16; i++) x[i] = state[i];
+
+		#define rotl32(x,k) ((x << k) | (x >> (32 - k)))
+		#define quarter(a,b,c,d) \
+			x[a] += x[b]; t = x[d]^x[a]; x[d] = rotl32(t,16); \
+			x[c] += x[d]; t = x[b]^x[c]; x[b] = rotl32(t,12); \
+			x[a] += x[b]; t = x[d]^x[a]; x[d] = rotl32(t, 8); \
+			x[c] += x[d]; t = x[b]^x[c]; x[b] = rotl32(t, 7);
+
+		for (i = 0; i < 12; i += 2) {
+			quarter( 0, 4, 8,12)
+			quarter( 1, 5, 9,13)
+			quarter( 2, 6,10,14)
+			quarter( 3, 7,11,15)
+			quarter( 0, 5,10,15)
+			quarter( 1, 6,11,12)
+			quarter( 2, 7, 8,13)
+			quarter( 3, 4, 9,14)
+		};
+
+		if (bytes <= 64) {
+			memcpy(out, x, bytes);
+			bytes = 0;
+		} else {
+			memcpy(out, x, 64);
+			bytes -= 64;
+			out += 64;
+		}
+
+		/* don't need a nonce, so last 4 words are the counter. 2^136 bytes can be generated */
+		if (!++state[12]) if (!++state[13]) if (!++state[14]) ++state[15];
+	}
+}
+
+
+
+int main() {
+	const size_t skmax = 1024;
+	static unsigned char sk[1024][32];
+	unsigned char pk[3][32];
+	unsigned char *skp;
+	size_t ski, pki, i;
+	uint64_t ctr;
+
+	printf("fuzzing: ");
+	printf(" ref10");
+	printf(" curved25519");
+#if defined(ED25519_SSE2)
+	printf(" curved25519-sse2");
+#endif
+	printf("\n\n");
+
+	for (ctr = 0, ski = skmax;;ctr++) {
+		if (ski == skmax) {
+			prng((unsigned char *)sk, sizeof(sk));
+			ski = 0;
+		}
+		skp = sk[ski++];
+
+		pki = 0;
+		crypto_scalarmult_base_ref10(pk[pki++], skp);
+		curved25519_scalarmult_basepoint(pk[pki++],  skp);
+		#if defined(ED25519_SSE2)
+			curved25519_scalarmult_basepoint_sse2(pk[pki++], skp);
+		#endif
+
+		for (i = 1; i < pki; i++) {
+			if (memcmp(pk[0], pk[i], 32) != 0) {
+				printf("\n\n");
+				print_bytes("sk",  skp, 32);
+				print_bytes("ref10", pk[0], 32);
+				print_diff("curved25519", pk[0], pk[1], 32);
+				#if defined(ED25519_SSE2)
+					print_diff("curved25519-sse2", pk[0], pk[2], 32);
+				#endif
+				exit(1);
+			}
+		}
+
+		if (ctr && (ctr % 0x1000 == 0)) {
+			printf(".");
+			if ((ctr % 0x20000) == 0) {
+				printf(" [");
+				for (i = 0; i < 8; i++)
+					printf("%02x", (unsigned char)(ctr >> ((7 - i) * 8)));
+				printf("]\n");
+			}
+		}
+	}
+}
+

src/external/ed25519-donna/fuzz/fuzz-ed25519.c

@@ -0,0 +1,219 @@
+#if defined(_WIN32)
+	#include <windows.h>
+	#include <wincrypt.h>
+	typedef unsigned int uint32_t;
+#else
+	#include <stdint.h>
+#endif
+
+#include <string.h>
+#include <stdio.h>
+
+#include "ed25519-donna.h"
+#include "ed25519-ref10.h"
+
+static void
+print_diff(const char *desc, const unsigned char *a, const unsigned char *b, size_t len) {
+	size_t p = 0;
+	unsigned char diff;
+	printf("%s diff:\n", desc);
+	while (len--) {
+		diff = *a++ ^ *b++;
+		if (!diff)
+			printf("____,");
+		else
+			printf("0x%02x,", diff);
+		if ((++p & 15) == 0)
+			printf("\n");
+	}
+	printf("\n");
+}
+
+static void
+print_bytes(const char *desc, const unsigned char *bytes, size_t len) {
+	size_t p = 0;
+	printf("%s:\n", desc);
+	while (len--) {
+		printf("0x%02x,", *bytes++);
+		if ((++p & 15) == 0)
+			printf("\n");
+	}
+	printf("\n");
+}
+
+
+/* chacha20/12 prng */
+void
+prng(unsigned char *out, size_t bytes) {
+	static uint32_t state[16];
+	static int init = 0;
+	uint32_t x[16], t;
+	size_t i;
+
+	if (!init) {
+	#if defined(_WIN32)
+		HCRYPTPROV csp = NULL;
+		if (!CryptAcquireContext(&csp, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
+			printf("CryptAcquireContext failed\n");
+			exit(1);
+		}
+		if (!CryptGenRandom(csp, (DWORD)sizeof(state), (BYTE*)state)) {
+			printf("CryptGenRandom failed\n");
+			exit(1);
+		}
+		CryptReleaseContext(csp, 0);
+	#else
+		FILE *f = NULL;
+		f = fopen("/dev/urandom", "rb");
+		if (!f) {
+			printf("failed to open /dev/urandom\n");
+			exit(1);
+		}
+		if (fread(state, sizeof(state), 1, f) != 1) {
+			printf("read error on /dev/urandom\n");
+			exit(1);
+		}
+	#endif
+		init = 1;
+	}
+
+	while (bytes) {
+		for (i = 0; i < 16; i++) x[i] = state[i];
+
+		#define rotl32(x,k) ((x << k) | (x >> (32 - k)))
+		#define quarter(a,b,c,d) \
+			x[a] += x[b]; t = x[d]^x[a]; x[d] = rotl32(t,16); \
+			x[c] += x[d]; t = x[b]^x[c]; x[b] = rotl32(t,12); \
+			x[a] += x[b]; t = x[d]^x[a]; x[d] = rotl32(t, 8); \
+			x[c] += x[d]; t = x[b]^x[c]; x[b] = rotl32(t, 7);
+
+		for (i = 0; i < 12; i += 2) {
+			quarter( 0, 4, 8,12)
+			quarter( 1, 5, 9,13)
+			quarter( 2, 6,10,14)
+			quarter( 3, 7,11,15)
+			quarter( 0, 5,10,15)
+			quarter( 1, 6,11,12)
+			quarter( 2, 7, 8,13)
+			quarter( 3, 4, 9,14)
+		};
+
+		if (bytes <= 64) {
+			memcpy(out, x, bytes);
+			bytes = 0;
+		} else {
+			memcpy(out, x, 64);
+			bytes -= 64;
+			out += 64;
+		}
+
+		/* don't need a nonce, so last 4 words are the counter. 2^136 bytes can be generated */
+		if (!++state[12]) if (!++state[13]) if (!++state[14]) ++state[15];
+	}
+}
+
+typedef struct random_data_t {
+	unsigned char sk[32];
+	unsigned char m[128];
+} random_data;
+
+typedef struct generated_data_t {
+	unsigned char pk[32];
+	unsigned char sig[64];
+	int valid;
+} generated_data;
+
+static void
+print_generated(const char *desc, generated_data *g) {
+	printf("%s:\n", desc);
+	print_bytes("pk", g->pk, 32);
+	print_bytes("sig", g->sig, 64);
+	printf("valid: %s\n\n", g->valid ? "no" : "yes");
+}
+
+static void
+print_generated_diff(const char *desc, const generated_data *base, generated_data *g) {
+	printf("%s:\n", desc);
+	print_diff("pk", base->pk, g->pk, 32);
+	print_diff("sig", base->sig, g->sig, 64);
+	printf("valid: %s\n\n", (base->valid == g->valid) ? "___" : (g->valid ? "no" : "yes"));
+}
+
+int main() {
+	const size_t rndmax = 128;
+	static random_data rnd[128];
+	static generated_data gen[3];
+	random_data *r;
+	generated_data *g;
+	unsigned long long dummylen;
+	unsigned char dummysk[64];
+	unsigned char dummymsg[2][128+64];
+	size_t rndi, geni, i, j;
+	uint64_t ctr;
+
+	printf("fuzzing: ");
+	printf(" ref10");
+	printf(" ed25519-donna");
+#if defined(ED25519_SSE2)
+	printf(" ed25519-donna-sse2");
+#endif
+	printf("\n\n");
+
+	for (ctr = 0, rndi = rndmax;;ctr++) {
+		if (rndi == rndmax) {
+			prng((unsigned char *)rnd, sizeof(rnd));
+			rndi = 0;
+		}
+		r = &rnd[rndi++];
+
+		/* ref10, lots of horrible gymnastics to work around the wonky api */
+		geni = 0;
+		g = &gen[geni++];
+		memcpy(dummysk, r->sk, 32); /* pk is appended to the sk, need to copy the sk to a larger buffer */
+		crypto_sign_pk_ref10(dummysk + 32, dummysk);
+		memcpy(g->pk, dummysk + 32, 32); 
+		crypto_sign_ref10(dummymsg[0], &dummylen, r->m, 128, dummysk);
+		memcpy(g->sig, dummymsg[0], 64); /* sig is placed in front of the signed message */
+		g->valid = crypto_sign_open_ref10(dummymsg[1], &dummylen, dummymsg[0], 128 + 64, g->pk);
+
+		/* ed25519-donna */
+		g = &gen[geni++];
+		ed25519_publickey(r->sk, g->pk);
+		ed25519_sign(r->m, 128, r->sk, g->pk, g->sig);
+		g->valid = ed25519_sign_open(r->m, 128, g->pk, g->sig);
+
+		#if defined(ED25519_SSE2)
+			/* ed25519-donna-sse2 */
+			g = &gen[geni++];
+			ed25519_publickey_sse2(r->sk, g->pk);
+			ed25519_sign_sse2(r->m, 128, r->sk, g->pk, g->sig);
+			g->valid = ed25519_sign_open_sse2(r->m, 128, g->pk, g->sig);
+		#endif
+
+		/* compare implementations 1..geni against the reference */
+		for (i = 1; i < geni; i++) {
+			if (memcmp(&gen[0], &gen[i], sizeof(generated_data)) != 0) {
+				printf("\n\n");
+				print_bytes("sk", r->sk, 32);
+				print_bytes("m", r->m, 128);
+				print_generated("ref10", &gen[0]);
+				print_generated_diff("ed25519-donna", &gen[0], &gen[1]);
+				#if defined(ED25519_SSE2)
+					print_generated_diff("ed25519-donna-sse2", &gen[0], &gen[2]);
+				#endif
+				exit(1);
+			}
+		}
+
+		/* print out status */
+		if (ctr && (ctr % 0x1000 == 0)) {
+			printf(".");
+			if ((ctr % 0x20000) == 0) {
+				printf(" [");
+				for (i = 0; i < 8; i++)
+					printf("%02x", (unsigned char)(ctr >> ((7 - i) * 8)));
+				printf("]\n");
+			}
+		}
+	}
+}

src/external/ed25519-donna/modm-donna-32bit.h

@@ -0,0 +1,469 @@
+/*
+	Public domain by Andrew M. <liquidsun@gmail.com>
+*/
+
+
+/*
+	Arithmetic modulo the group order n = 2^252 +  27742317777372353535851937790883648493 = 7237005577332262213973186563042994240857116359379907606001950938285454250989
+
+	k = 32
+	b = 1 << 8 = 256
+	m = 2^252 + 27742317777372353535851937790883648493 = 0x1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed
+	mu = floor( b^(k*2) / m ) = 0xfffffffffffffffffffffffffffffffeb2106215d086329a7ed9ce5a30a2c131b
+*/
+
+#define bignum256modm_bits_per_limb 30
+#define bignum256modm_limb_size 9
+
+typedef uint32_t bignum256modm_element_t;
+typedef bignum256modm_element_t bignum256modm[9];
+
+static const bignum256modm modm_m = {
+	0x1cf5d3ed, 0x20498c69, 0x2f79cd65, 0x37be77a8,
+	0x00000014,	0x00000000, 0x00000000,	0x00000000,
+	0x00001000
+};
+
+static const bignum256modm modm_mu = {
+	0x0a2c131b, 0x3673968c, 0x06329a7e, 0x01885742,
+	0x3fffeb21, 0x3fffffff, 0x3fffffff, 0x3fffffff,
+	0x000fffff
+};
+
+static bignum256modm_element_t
+lt_modm(bignum256modm_element_t a, bignum256modm_element_t b) {
+	return (a - b) >> 31;
+}
+
+/* see HAC, Alg. 14.42 Step 4 */
+static void
+reduce256_modm(bignum256modm r) {
+	bignum256modm t;
+	bignum256modm_element_t b = 0, pb, mask;
+
+	/* t = r - m */
+	pb = 0;
+	pb += modm_m[0]; b = lt_modm(r[0], pb); t[0] = (r[0] - pb + (b << 30)); pb = b;
+	pb += modm_m[1]; b = lt_modm(r[1], pb); t[1] = (r[1] - pb + (b << 30)); pb = b;
+	pb += modm_m[2]; b = lt_modm(r[2], pb); t[2] = (r[2] - pb + (b << 30)); pb = b;
+	pb += modm_m[3]; b = lt_modm(r[3], pb); t[3] = (r[3] - pb + (b << 30)); pb = b;
+	pb += modm_m[4]; b = lt_modm(r[4], pb); t[4] = (r[4] - pb + (b << 30)); pb = b;
+	pb += modm_m[5]; b = lt_modm(r[5], pb); t[5] = (r[5] - pb + (b << 30)); pb = b;
+	pb += modm_m[6]; b = lt_modm(r[6], pb); t[6] = (r[6] - pb + (b << 30)); pb = b;
+	pb += modm_m[7]; b = lt_modm(r[7], pb); t[7] = (r[7] - pb + (b << 30)); pb = b;
+	pb += modm_m[8]; b = lt_modm(r[8], pb); t[8] = (r[8] - pb + (b << 16));
+
+	/* keep r if r was smaller than m */
+	mask = b - 1;
+	r[0] ^= mask & (r[0] ^ t[0]);
+	r[1] ^= mask & (r[1] ^ t[1]);
+	r[2] ^= mask & (r[2] ^ t[2]);
+	r[3] ^= mask & (r[3] ^ t[3]);
+	r[4] ^= mask & (r[4] ^ t[4]);
+	r[5] ^= mask & (r[5] ^ t[5]);
+	r[6] ^= mask & (r[6] ^ t[6]);
+	r[7] ^= mask & (r[7] ^ t[7]);
+	r[8] ^= mask & (r[8] ^ t[8]);
+}
+
+/*
+	Barrett reduction,  see HAC, Alg. 14.42
+
+	Instead of passing in x, pre-process in to q1 and r1 for efficiency
+*/
+static void
+barrett_reduce256_modm(bignum256modm r, const bignum256modm q1, const bignum256modm r1) {
+	bignum256modm q3, r2;
+	uint64_t c;
+	bignum256modm_element_t f, b, pb;
+
+	/* q1 = x >> 248 = 264 bits = 9 30 bit elements
+	   q2 = mu * q1
+	   q3 = (q2 / 256(32+1)) = q2 / (2^8)^(32+1) = q2 >> 264 */
+	c  = mul32x32_64(modm_mu[0], q1[7]) + mul32x32_64(modm_mu[1], q1[6]) + mul32x32_64(modm_mu[2], q1[5]) + mul32x32_64(modm_mu[3], q1[4]) + mul32x32_64(modm_mu[4], q1[3]) + mul32x32_64(modm_mu[5], q1[2]) + mul32x32_64(modm_mu[6], q1[1]) + mul32x32_64(modm_mu[7], q1[0]); 
+	c >>= 30;
+	c += mul32x32_64(modm_mu[0], q1[8]) + mul32x32_64(modm_mu[1], q1[7]) + mul32x32_64(modm_mu[2], q1[6]) + mul32x32_64(modm_mu[3], q1[5]) + mul32x32_64(modm_mu[4], q1[4]) + mul32x32_64(modm_mu[5], q1[3]) + mul32x32_64(modm_mu[6], q1[2]) + mul32x32_64(modm_mu[7], q1[1]) + mul32x32_64(modm_mu[8], q1[0]);
+	f = (bignum256modm_element_t)c; q3[0] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[1], q1[8]) + mul32x32_64(modm_mu[2], q1[7]) + mul32x32_64(modm_mu[3], q1[6]) + mul32x32_64(modm_mu[4], q1[5]) + mul32x32_64(modm_mu[5], q1[4]) + mul32x32_64(modm_mu[6], q1[3]) + mul32x32_64(modm_mu[7], q1[2]) + mul32x32_64(modm_mu[8], q1[1]);
+	f = (bignum256modm_element_t)c; q3[0] |= (f << 6) & 0x3fffffff; q3[1] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[2], q1[8]) + mul32x32_64(modm_mu[3], q1[7]) + mul32x32_64(modm_mu[4], q1[6]) + mul32x32_64(modm_mu[5], q1[5]) + mul32x32_64(modm_mu[6], q1[4]) + mul32x32_64(modm_mu[7], q1[3]) + mul32x32_64(modm_mu[8], q1[2]);
+	f = (bignum256modm_element_t)c; q3[1] |= (f << 6) & 0x3fffffff; q3[2] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[3], q1[8]) + mul32x32_64(modm_mu[4], q1[7]) + mul32x32_64(modm_mu[5], q1[6]) + mul32x32_64(modm_mu[6], q1[5]) + mul32x32_64(modm_mu[7], q1[4]) + mul32x32_64(modm_mu[8], q1[3]);
+	f = (bignum256modm_element_t)c; q3[2] |= (f << 6) & 0x3fffffff; q3[3] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[4], q1[8]) + mul32x32_64(modm_mu[5], q1[7]) + mul32x32_64(modm_mu[6], q1[6]) + mul32x32_64(modm_mu[7], q1[5]) + mul32x32_64(modm_mu[8], q1[4]);
+	f = (bignum256modm_element_t)c; q3[3] |= (f << 6) & 0x3fffffff; q3[4] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[5], q1[8]) + mul32x32_64(modm_mu[6], q1[7]) + mul32x32_64(modm_mu[7], q1[6]) + mul32x32_64(modm_mu[8], q1[5]);
+	f = (bignum256modm_element_t)c; q3[4] |= (f << 6) & 0x3fffffff; q3[5] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[6], q1[8]) + mul32x32_64(modm_mu[7], q1[7]) + mul32x32_64(modm_mu[8], q1[6]);
+	f = (bignum256modm_element_t)c; q3[5] |= (f << 6) & 0x3fffffff; q3[6] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[7], q1[8]) + mul32x32_64(modm_mu[8], q1[7]);
+	f = (bignum256modm_element_t)c; q3[6] |= (f << 6) & 0x3fffffff; q3[7] = (f >> 24) & 0x3f; c >>= 30;
+	c += mul32x32_64(modm_mu[8], q1[8]);
+	f = (bignum256modm_element_t)c; q3[7] |= (f << 6) & 0x3fffffff; q3[8] = (bignum256modm_element_t)(c >> 24);
+
+	/* r1 = (x mod 256^(32+1)) = x mod (2^8)(31+1) = x & ((1 << 264) - 1)
+	   r2 = (q3 * m) mod (256^(32+1)) = (q3 * m) & ((1 << 264) - 1) */
+	c = mul32x32_64(modm_m[0], q3[0]);
+	r2[0] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[1]) + mul32x32_64(modm_m[1], q3[0]);
+	r2[1] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[2]) + mul32x32_64(modm_m[1], q3[1]) + mul32x32_64(modm_m[2], q3[0]);
+	r2[2] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[3]) + mul32x32_64(modm_m[1], q3[2]) + mul32x32_64(modm_m[2], q3[1]) + mul32x32_64(modm_m[3], q3[0]);
+	r2[3] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[4]) + mul32x32_64(modm_m[1], q3[3]) + mul32x32_64(modm_m[2], q3[2]) + mul32x32_64(modm_m[3], q3[1]) + mul32x32_64(modm_m[4], q3[0]);
+	r2[4] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[5]) + mul32x32_64(modm_m[1], q3[4]) + mul32x32_64(modm_m[2], q3[3]) + mul32x32_64(modm_m[3], q3[2]) + mul32x32_64(modm_m[4], q3[1]) + mul32x32_64(modm_m[5], q3[0]);
+	r2[5] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[6]) + mul32x32_64(modm_m[1], q3[5]) + mul32x32_64(modm_m[2], q3[4]) + mul32x32_64(modm_m[3], q3[3]) + mul32x32_64(modm_m[4], q3[2]) + mul32x32_64(modm_m[5], q3[1]) + mul32x32_64(modm_m[6], q3[0]);
+	r2[6] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[7]) + mul32x32_64(modm_m[1], q3[6]) + mul32x32_64(modm_m[2], q3[5]) + mul32x32_64(modm_m[3], q3[4]) + mul32x32_64(modm_m[4], q3[3]) + mul32x32_64(modm_m[5], q3[2]) + mul32x32_64(modm_m[6], q3[1]) + mul32x32_64(modm_m[7], q3[0]);
+	r2[7] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(modm_m[0], q3[8]) + mul32x32_64(modm_m[1], q3[7]) + mul32x32_64(modm_m[2], q3[6]) + mul32x32_64(modm_m[3], q3[5]) + mul32x32_64(modm_m[4], q3[4]) + mul32x32_64(modm_m[5], q3[3]) + mul32x32_64(modm_m[6], q3[2]) + mul32x32_64(modm_m[7], q3[1]) + mul32x32_64(modm_m[8], q3[0]);
+	r2[8] = (bignum256modm_element_t)(c & 0xffffff);
+
+	/* r = r1 - r2
+	   if (r < 0) r += (1 << 264) */
+	pb = 0;
+	pb += r2[0]; b = lt_modm(r1[0], pb); r[0] = (r1[0] - pb + (b << 30)); pb = b;
+	pb += r2[1]; b = lt_modm(r1[1], pb); r[1] = (r1[1] - pb + (b << 30)); pb = b;
+	pb += r2[2]; b = lt_modm(r1[2], pb); r[2] = (r1[2] - pb + (b << 30)); pb = b;
+	pb += r2[3]; b = lt_modm(r1[3], pb); r[3] = (r1[3] - pb + (b << 30)); pb = b;
+	pb += r2[4]; b = lt_modm(r1[4], pb); r[4] = (r1[4] - pb + (b << 30)); pb = b;
+	pb += r2[5]; b = lt_modm(r1[5], pb); r[5] = (r1[5] - pb + (b << 30)); pb = b;
+	pb += r2[6]; b = lt_modm(r1[6], pb); r[6] = (r1[6] - pb + (b << 30)); pb = b;
+	pb += r2[7]; b = lt_modm(r1[7], pb); r[7] = (r1[7] - pb + (b << 30)); pb = b;
+	pb += r2[8]; b = lt_modm(r1[8], pb); r[8] = (r1[8] - pb + (b << 24));
+
+	reduce256_modm(r);
+	reduce256_modm(r);
+}
+
+/* addition modulo m */
+static void
+add256_modm(bignum256modm r, const bignum256modm x, const bignum256modm y) {
+	bignum256modm_element_t c;
+
+	c  = x[0] + y[0]; r[0] = c & 0x3fffffff; c >>= 30;
+	c += x[1] + y[1]; r[1] = c & 0x3fffffff; c >>= 30;
+	c += x[2] + y[2]; r[2] = c & 0x3fffffff; c >>= 30;
+	c += x[3] + y[3]; r[3] = c & 0x3fffffff; c >>= 30;
+	c += x[4] + y[4]; r[4] = c & 0x3fffffff; c >>= 30;
+	c += x[5] + y[5]; r[5] = c & 0x3fffffff; c >>= 30;
+	c += x[6] + y[6]; r[6] = c & 0x3fffffff; c >>= 30;
+	c += x[7] + y[7]; r[7] = c & 0x3fffffff; c >>= 30;
+	c += x[8] + y[8]; r[8] = c;
+
+	reduce256_modm(r);
+}
+
+/* multiplication modulo m */
+static void 
+mul256_modm(bignum256modm r, const bignum256modm x, const bignum256modm y) {
+	bignum256modm r1, q1;
+	uint64_t c;
+	bignum256modm_element_t f;
+
+	/* r1 = (x mod 256^(32+1)) = x mod (2^8)(31+1) = x & ((1 << 264) - 1)
+	   q1 = x >> 248 = 264 bits = 9 30 bit elements */
+	c = mul32x32_64(x[0], y[0]);
+	f = (bignum256modm_element_t)c; r1[0] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[1]) + mul32x32_64(x[1], y[0]);
+	f = (bignum256modm_element_t)c; r1[1] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[2]) + mul32x32_64(x[1], y[1]) + mul32x32_64(x[2], y[0]);
+	f = (bignum256modm_element_t)c; r1[2] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[3]) + mul32x32_64(x[1], y[2]) + mul32x32_64(x[2], y[1]) + mul32x32_64(x[3], y[0]);
+	f = (bignum256modm_element_t)c; r1[3] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[4]) + mul32x32_64(x[1], y[3]) + mul32x32_64(x[2], y[2]) + mul32x32_64(x[3], y[1]) + mul32x32_64(x[4], y[0]);
+	f = (bignum256modm_element_t)c; r1[4] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[5]) + mul32x32_64(x[1], y[4]) + mul32x32_64(x[2], y[3]) + mul32x32_64(x[3], y[2]) + mul32x32_64(x[4], y[1]) + mul32x32_64(x[5], y[0]);
+	f = (bignum256modm_element_t)c; r1[5] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[6]) + mul32x32_64(x[1], y[5]) + mul32x32_64(x[2], y[4]) + mul32x32_64(x[3], y[3]) + mul32x32_64(x[4], y[2]) + mul32x32_64(x[5], y[1]) + mul32x32_64(x[6], y[0]);
+	f = (bignum256modm_element_t)c; r1[6] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[7]) + mul32x32_64(x[1], y[6]) + mul32x32_64(x[2], y[5]) + mul32x32_64(x[3], y[4]) + mul32x32_64(x[4], y[3]) + mul32x32_64(x[5], y[2]) + mul32x32_64(x[6], y[1]) + mul32x32_64(x[7], y[0]);
+	f = (bignum256modm_element_t)c; r1[7] = (f & 0x3fffffff); c >>= 30;
+	c += mul32x32_64(x[0], y[8]) + mul32x32_64(x[1], y[7]) + mul32x32_64(x[2], y[6]) + mul32x32_64(x[3], y[5]) + mul32x32_64(x[4], y[4]) + mul32x32_64(x[5], y[3]) + mul32x32_64(x[6], y[2]) + mul32x32_64(x[7], y[1]) + mul32x32_64(x[8], y[0]);
+	f = (bignum256modm_element_t)c; r1[8] = (f & 0x00ffffff); q1[0] = (f >> 8) & 0x3fffff; c >>= 30;
+	c += mul32x32_64(x[1], y[8]) + mul32x32_64(x[2], y[7]) + mul32x32_64(x[3], y[6]) + mul32x32_64(x[4], y[5]) + mul32x32_64(x[5], y[4]) + mul32x32_64(x[6], y[3]) + mul32x32_64(x[7], y[2]) + mul32x32_64(x[8], y[1]);
+	f = (bignum256modm_element_t)c; q1[0] = (q1[0] | (f << 22)) & 0x3fffffff; q1[1] = (f >> 8) & 0x3fffff; c >>= 30;	
+	c += mul32x32_64(x[2], y[8]) + mul32x32_64(x[3], y[7]) + mul32x32_64(x[4], y[6]) + mul32x32_64(x[5], y[5]) + mul32x32_64(x[6], y[4]) + mul32x32_64(x[7], y[3]) + mul32x32_64(x[8], y[2]);
+	f = (bignum256modm_element_t)c; q1[1] = (q1[1] | (f << 22)) & 0x3fffffff; q1[2] = (f >> 8) & 0x3fffff; c >>= 30;	
+	c += mul32x32_64(x[3], y[8]) + mul32x32_64(x[4], y[7]) + mul32x32_64(x[5], y[6]) + mul32x32_64(x[6], y[5]) + mul32x32_64(x[7], y[4]) + mul32x32_64(x[8], y[3]);
+	f = (bignum256modm_element_t)c; q1[2] = (q1[2] | (f << 22)) & 0x3fffffff; q1[3] = (f >> 8) & 0x3fffff; c >>= 30;	
+	c += mul32x32_64(x[4], y[8]) + mul32x32_64(x[5], y[7]) + mul32x32_64(x[6], y[6]) + mul32x32_64(x[7], y[5]) + mul32x32_64(x[8], y[4]);
+	f = (bignum256modm_element_t)c; q1[3] = (q1[3] | (f << 22)) & 0x3fffffff; q1[4] = (f >> 8) & 0x3fffff; c >>= 30;	
+	c += mul32x32_64(x[5], y[8]) + mul32x32_64(x[6], y[7]) + mul32x32_64(x[7], y[6]) + mul32x32_64(x[8], y[5]);
+	f = (bignum256modm_element_t)c; q1[4] = (q1[4] | (f << 22)) & 0x3fffffff; q1[5] = (f >> 8) & 0x3fffff; c >>= 30;
+	c += mul32x32_64(x[6], y[8]) + mul32x32_64(x[7], y[7]) + mul32x32_64(x[8], y[6]);
+	f = (bignum256modm_element_t)c; q1[5] = (q1[5] | (f << 22)) & 0x3fffffff; q1[6] = (f >> 8) & 0x3fffff; c >>= 30;
+	c += mul32x32_64(x[7], y[8]) + mul32x32_64(x[8], y[7]);
+	f = (bignum256modm_element_t)c; q1[6] = (q1[6] | (f << 22)) & 0x3fffffff; q1[7] = (f >> 8) & 0x3fffff; c >>= 30;
+	c += mul32x32_64(x[8], y[8]);
+	f = (bignum256modm_element_t)c; q1[7] = (q1[7] | (f << 22)) & 0x3fffffff; q1[8] = (f >> 8) & 0x3fffff;
+
+	barrett_reduce256_modm(r, q1, r1);
+}
+
+static void
+expand256_modm(bignum256modm out, const unsigned char *in, size_t len) {
+	unsigned char work[64] = {0};
+	bignum256modm_element_t x[16];
+	bignum256modm q1;
+
+	memcpy(work, in, len);
+	x[0] = U8TO32_LE(work +  0);
+	x[1] = U8TO32_LE(work +  4);
+	x[2] = U8TO32_LE(work +  8);
+	x[3] = U8TO32_LE(work + 12);
+	x[4] = U8TO32_LE(work + 16);
+	x[5] = U8TO32_LE(work + 20);
+	x[6] = U8TO32_LE(work + 24);
+	x[7] = U8TO32_LE(work + 28);
+	x[8] = U8TO32_LE(work + 32);
+	x[9] = U8TO32_LE(work + 36);
+	x[10] = U8TO32_LE(work + 40);
+	x[11] = U8TO32_LE(work + 44);
+	x[12] = U8TO32_LE(work + 48);
+	x[13] = U8TO32_LE(work + 52);
+	x[14] = U8TO32_LE(work + 56);
+	x[15] = U8TO32_LE(work + 60);
+
+	/* r1 = (x mod 256^(32+1)) = x mod (2^8)(31+1) = x & ((1 << 264) - 1) */
+	out[0] = (                         x[0]) & 0x3fffffff;
+	out[1] = ((x[ 0] >> 30) | (x[ 1] <<  2)) & 0x3fffffff;
+	out[2] = ((x[ 1] >> 28) | (x[ 2] <<  4)) & 0x3fffffff;
+	out[3] = ((x[ 2] >> 26) | (x[ 3] <<  6)) & 0x3fffffff;
+	out[4] = ((x[ 3] >> 24) | (x[ 4] <<  8)) & 0x3fffffff;
+	out[5] = ((x[ 4] >> 22) | (x[ 5] << 10)) & 0x3fffffff;
+	out[6] = ((x[ 5] >> 20) | (x[ 6] << 12)) & 0x3fffffff;
+	out[7] = ((x[ 6] >> 18) | (x[ 7] << 14)) & 0x3fffffff;
+	out[8] = ((x[ 7] >> 16) | (x[ 8] << 16)) & 0x00ffffff;
+
+	/* 8*31 = 248 bits, no need to reduce */
+	if (len < 32)
+		return;
+
+	/* q1 = x >> 248 = 264 bits = 9 30 bit elements */
+	q1[0] = ((x[ 7] >> 24) | (x[ 8] <<  8)) & 0x3fffffff;
+	q1[1] = ((x[ 8] >> 22) | (x[ 9] << 10)) & 0x3fffffff;
+	q1[2] = ((x[ 9] >> 20) | (x[10] << 12)) & 0x3fffffff;
+	q1[3] = ((x[10] >> 18) | (x[11] << 14)) & 0x3fffffff;
+	q1[4] = ((x[11] >> 16) | (x[12] << 16)) & 0x3fffffff;
+	q1[5] = ((x[12] >> 14) | (x[13] << 18)) & 0x3fffffff;
+	q1[6] = ((x[13] >> 12) | (x[14] << 20)) & 0x3fffffff;
+	q1[7] = ((x[14] >> 10) | (x[15] << 22)) & 0x3fffffff;
+	q1[8] = ((x[15] >>  8)                );	
+
+	barrett_reduce256_modm(out, q1, out);
+}
+
+static void
+expand_raw256_modm(bignum256modm out, const unsigned char in[32]) {
+	bignum256modm_element_t x[8];
+
+	x[0] = U8TO32_LE(in +  0);
+	x[1] = U8TO32_LE(in +  4);
+	x[2] = U8TO32_LE(in +  8);
+	x[3] = U8TO32_LE(in + 12);
+	x[4] = U8TO32_LE(in + 16);
+	x[5] = U8TO32_LE(in + 20);
+	x[6] = U8TO32_LE(in + 24);
+	x[7] = U8TO32_LE(in + 28);
+
+	out[0] = (                         x[0]) & 0x3fffffff;
+	out[1] = ((x[ 0] >> 30) | (x[ 1] <<  2)) & 0x3fffffff;
+	out[2] = ((x[ 1] >> 28) | (x[ 2] <<  4)) & 0x3fffffff;
+	out[3] = ((x[ 2] >> 26) | (x[ 3] <<  6)) & 0x3fffffff;
+	out[4] = ((x[ 3] >> 24) | (x[ 4] <<  8)) & 0x3fffffff;
+	out[5] = ((x[ 4] >> 22) | (x[ 5] << 10)) & 0x3fffffff;
+	out[6] = ((x[ 5] >> 20) | (x[ 6] << 12)) & 0x3fffffff;
+	out[7] = ((x[ 6] >> 18) | (x[ 7] << 14)) & 0x3fffffff;
+	out[8] = ((x[ 7] >> 16)                ) & 0x0000ffff;
+}
+
+static void
+contract256_modm(unsigned char out[32], const bignum256modm in) {
+	U32TO8_LE(out +  0, (in[0]      ) | (in[1] << 30));
+	U32TO8_LE(out +  4, (in[1] >>  2) | (in[2] << 28));
+	U32TO8_LE(out +  8, (in[2] >>  4) | (in[3] << 26));
+	U32TO8_LE(out + 12, (in[3] >>  6) | (in[4] << 24));
+	U32TO8_LE(out + 16, (in[4] >>  8) | (in[5] << 22));
+	U32TO8_LE(out + 20, (in[5] >> 10) | (in[6] << 20));
+	U32TO8_LE(out + 24, (in[6] >> 12) | (in[7] << 18));
+	U32TO8_LE(out + 28, (in[7] >> 14) | (in[8] << 16));
+}
+
+
+
+static void
+contract256_window4_modm(signed char r[64], const bignum256modm in) {
+	char carry;
+	signed char *quads = r;
+	bignum256modm_element_t i, j, v;
+
+	for (i = 0; i < 8; i += 2) {
+		v = in[i];
+		for (j = 0; j < 7; j++) {
+			*quads++ = (v & 15);
+			v >>= 4;
+		}
+		v |= (in[i+1] << 2);
+		for (j = 0; j < 8; j++) {
+			*quads++ = (v & 15);
+			v >>= 4;
+		}
+	}
+	v = in[8];
+	*quads++ = (v & 15); v >>= 4;
+	*quads++ = (v & 15); v >>= 4;
+	*quads++ = (v & 15); v >>= 4;
+	*quads++ = (v & 15); v >>= 4;
+
+	/* making it signed */
+	carry = 0;
+	for(i = 0; i < 63; i++) {
+		r[i] += carry;
+		r[i+1] += (r[i] >> 4);
+		r[i] &= 15;
+		carry = (r[i] >> 3);
+		r[i] -= (carry << 4);
+	}
+	r[63] += carry;
+}
+
+static void
+contract256_slidingwindow_modm(signed char r[256], const bignum256modm s, int windowsize) {
+	int i,j,k,b;
+	int m = (1 << (windowsize - 1)) - 1, soplen = 256;
+	signed char *bits = r;
+	bignum256modm_element_t v;
+
+	/* first put the binary expansion into r  */
+	for (i = 0; i < 8; i++) {
+		v = s[i];
+		for (j = 0; j < 30; j++, v >>= 1)
+			*bits++ = (v & 1);
+	}
+	v = s[8];
+	for (j = 0; j < 16; j++, v >>= 1)
+		*bits++ = (v & 1);
+
+	/* Making it sliding window */
+	for (j = 0; j < soplen; j++) {
+		if (!r[j])
+			continue;
+
+		for (b = 1; (b < (soplen - j)) && (b <= 6); b++) {
+			if ((r[j] + (r[j + b] << b)) <= m) {
+				r[j] += r[j + b] << b;
+				r[j + b] = 0;
+			} else if ((r[j] - (r[j + b] << b)) >= -m) {
+				r[j] -= r[j + b] << b;
+				for (k = j + b; k < soplen; k++) {
+					if (!r[k]) {
+						r[k] = 1;
+						break;
+					}
+					r[k] = 0;
+				}
+			} else if (r[j + b]) {
+				break;
+			}
+		}
+	}
+}
+
+
+/*
+	helpers for batch verifcation, are allowed to be vartime
+*/
+
+/* out = a - b, a must be larger than b */
+static void
+sub256_modm_batch(bignum256modm out, const bignum256modm a, const bignum256modm b, size_t limbsize) {
+	size_t i = 0;
+	bignum256modm_element_t carry = 0;
+	switch (limbsize) {
+		case 8: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 7: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 6: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 5: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 4: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 3: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 2: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 1: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 31); out[i] &= 0x3fffffff; i++;
+		case 0: 
+		default: out[i] = (a[i] - b[i]) - carry;
+	}
+}
+
+
+/* is a < b */
+static int
+lt256_modm_batch(const bignum256modm a, const bignum256modm b, size_t limbsize) {
+	switch (limbsize) {
+		case 8: if (a[8] > b[8]) return 0; if (a[8] < b[8]) return 1;
+		case 7: if (a[7] > b[7]) return 0; if (a[7] < b[7]) return 1;
+		case 6: if (a[6] > b[6]) return 0; if (a[6] < b[6]) return 1;
+		case 5: if (a[5] > b[5]) return 0; if (a[5] < b[5]) return 1;
+		case 4: if (a[4] > b[4]) return 0; if (a[4] < b[4]) return 1;
+		case 3: if (a[3] > b[3]) return 0; if (a[3] < b[3]) return 1;
+		case 2: if (a[2] > b[2]) return 0; if (a[2] < b[2]) return 1;
+		case 1: if (a[1] > b[1]) return 0; if (a[1] < b[1]) return 1;
+		case 0: if (a[0] > b[0]) return 0; if (a[0] < b[0]) return 1;
+	}
+	return 0;
+}
+
+/* is a <= b */
+static int
+lte256_modm_batch(const bignum256modm a, const bignum256modm b, size_t limbsize) {
+	switch (limbsize) {
+		case 8: if (a[8] > b[8]) return 0; if (a[8] < b[8]) return 1;
+		case 7: if (a[7] > b[7]) return 0; if (a[7] < b[7]) return 1;
+		case 6: if (a[6] > b[6]) return 0; if (a[6] < b[6]) return 1;
+		case 5: if (a[5] > b[5]) return 0; if (a[5] < b[5]) return 1;
+		case 4: if (a[4] > b[4]) return 0; if (a[4] < b[4]) return 1;
+		case 3: if (a[3] > b[3]) return 0; if (a[3] < b[3]) return 1;
+		case 2: if (a[2] > b[2]) return 0; if (a[2] < b[2]) return 1;
+		case 1: if (a[1] > b[1]) return 0; if (a[1] < b[1]) return 1;
+		case 0: if (a[0] > b[0]) return 0; if (a[0] < b[0]) return 1;
+	}
+	return 1;
+}
+
+
+/* is a == 0 */
+static int
+iszero256_modm_batch(const bignum256modm a) {
+	size_t i;
+	for (i = 0; i < 9; i++)
+		if (a[i])
+			return 0;
+	return 1;
+}
+
+/* is a == 1 */
+static int
+isone256_modm_batch(const bignum256modm a) {
+	size_t i;
+	if (a[0] != 1)
+		return 0;
+	for (i = 1; i < 9; i++)
+		if (a[i])
+			return 0;
+	return 1;
+}
+
+/* can a fit in to (at most) 128 bits */
+static int
+isatmost128bits256_modm_batch(const bignum256modm a) {
+	uint32_t mask =
+		((a[8]             )  | /*  16 */
+		 (a[7]             )  | /*  46 */
+		 (a[6]             )  | /*  76 */
+		 (a[5]             )  | /* 106 */
+		 (a[4] & 0x3fffff00));  /* 128 */
+
+	return (mask == 0);
+}

src/external/ed25519-donna/modm-donna-64bit.h

@@ -0,0 +1,361 @@
+/*
+	Public domain by Andrew M. <liquidsun@gmail.com>
+*/
+
+
+/*
+	Arithmetic modulo the group order n = 2^252 +  27742317777372353535851937790883648493 = 7237005577332262213973186563042994240857116359379907606001950938285454250989
+
+	k = 32
+	b = 1 << 8 = 256
+	m = 2^252 + 27742317777372353535851937790883648493 = 0x1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed
+	mu = floor( b^(k*2) / m ) = 0xfffffffffffffffffffffffffffffffeb2106215d086329a7ed9ce5a30a2c131b
+*/
+
+#define bignum256modm_bits_per_limb 56
+#define bignum256modm_limb_size 5
+
+typedef uint64_t bignum256modm_element_t;
+typedef bignum256modm_element_t bignum256modm[5];
+
+static const bignum256modm modm_m = {
+	0x12631a5cf5d3ed, 
+	0xf9dea2f79cd658, 
+	0x000000000014de, 
+	0x00000000000000, 
+	0x00000010000000
+};
+
+static const bignum256modm modm_mu = {
+	0x9ce5a30a2c131b,
+	0x215d086329a7ed,
+	0xffffffffeb2106,
+	0xffffffffffffff,
+	0x00000fffffffff
+};
+
+static bignum256modm_element_t
+lt_modm(bignum256modm_element_t a, bignum256modm_element_t b) {
+	return (a - b) >> 63;
+}
+
+static void
+reduce256_modm(bignum256modm r) {
+	bignum256modm t;
+	bignum256modm_element_t b = 0, pb, mask;
+
+	/* t = r - m */
+	pb = 0;
+	pb += modm_m[0]; b = lt_modm(r[0], pb); t[0] = (r[0] - pb + (b << 56)); pb = b;
+	pb += modm_m[1]; b = lt_modm(r[1], pb); t[1] = (r[1] - pb + (b << 56)); pb = b;
+	pb += modm_m[2]; b = lt_modm(r[2], pb); t[2] = (r[2] - pb + (b << 56)); pb = b;
+	pb += modm_m[3]; b = lt_modm(r[3], pb); t[3] = (r[3] - pb + (b << 56)); pb = b;
+	pb += modm_m[4]; b = lt_modm(r[4], pb); t[4] = (r[4] - pb + (b << 32)); 
+
+	/* keep r if r was smaller than m */
+	mask = b - 1;
+
+	r[0] ^= mask & (r[0] ^ t[0]);
+	r[1] ^= mask & (r[1] ^ t[1]);
+	r[2] ^= mask & (r[2] ^ t[2]);
+	r[3] ^= mask & (r[3] ^ t[3]);
+	r[4] ^= mask & (r[4] ^ t[4]);
+}
+
+static void
+barrett_reduce256_modm(bignum256modm r, const bignum256modm q1, const bignum256modm r1) {
+	bignum256modm q3, r2;
+	uint128_t c, mul;
+	bignum256modm_element_t f, b, pb;
+
+	/* q1 = x >> 248 = 264 bits = 5 56 bit elements
+	   q2 = mu * q1
+	   q3 = (q2 / 256(32+1)) = q2 / (2^8)^(32+1) = q2 >> 264 */
+	mul64x64_128(c, modm_mu[0], q1[3])                 mul64x64_128(mul, modm_mu[3], q1[0]) add128(c, mul) mul64x64_128(mul, modm_mu[1], q1[2]) add128(c, mul) mul64x64_128(mul, modm_mu[2], q1[1]) add128(c, mul) shr128(f, c, 56);
+	mul64x64_128(c, modm_mu[0], q1[4]) add128_64(c, f) mul64x64_128(mul, modm_mu[4], q1[0]) add128(c, mul) mul64x64_128(mul, modm_mu[3], q1[1]) add128(c, mul) mul64x64_128(mul, modm_mu[1], q1[3]) add128(c, mul) mul64x64_128(mul, modm_mu[2], q1[2]) add128(c, mul)
+	f = lo128(c); q3[0] = (f >> 40) & 0xffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_mu[4], q1[1]) add128_64(c, f) mul64x64_128(mul, modm_mu[1], q1[4]) add128(c, mul) mul64x64_128(mul, modm_mu[2], q1[3]) add128(c, mul) mul64x64_128(mul, modm_mu[3], q1[2]) add128(c, mul)
+	f = lo128(c); q3[0] |= (f << 16) & 0xffffffffffffff; q3[1] = (f >> 40) & 0xffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_mu[4], q1[2]) add128_64(c, f) mul64x64_128(mul, modm_mu[2], q1[4]) add128(c, mul) mul64x64_128(mul, modm_mu[3], q1[3]) add128(c, mul)
+	f = lo128(c); q3[1] |= (f << 16) & 0xffffffffffffff; q3[2] = (f >> 40) & 0xffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_mu[4], q1[3]) add128_64(c, f) mul64x64_128(mul, modm_mu[3], q1[4]) add128(c, mul)
+	f = lo128(c); q3[2] |= (f << 16) & 0xffffffffffffff; q3[3] = (f >> 40) & 0xffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_mu[4], q1[4]) add128_64(c, f)
+	f = lo128(c); q3[3] |= (f << 16) & 0xffffffffffffff; q3[4] = (f >> 40) & 0xffff; shr128(f, c, 56);
+	q3[4] |= (f << 16);
+
+	mul64x64_128(c, modm_m[0], q3[0]) 
+	r2[0] = lo128(c) & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_m[0], q3[1]) add128_64(c, f) mul64x64_128(mul, modm_m[1], q3[0]) add128(c, mul)
+	r2[1] = lo128(c) & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_m[0], q3[2]) add128_64(c, f) mul64x64_128(mul, modm_m[2], q3[0]) add128(c, mul) mul64x64_128(mul, modm_m[1], q3[1]) add128(c, mul)
+	r2[2] = lo128(c) & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_m[0], q3[3]) add128_64(c, f) mul64x64_128(mul, modm_m[3], q3[0]) add128(c, mul) mul64x64_128(mul, modm_m[1], q3[2]) add128(c, mul) mul64x64_128(mul, modm_m[2], q3[1]) add128(c, mul)
+	r2[3] = lo128(c) & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, modm_m[0], q3[4]) add128_64(c, f) mul64x64_128(mul, modm_m[4], q3[0]) add128(c, mul) mul64x64_128(mul, modm_m[3], q3[1]) add128(c, mul) mul64x64_128(mul, modm_m[1], q3[3]) add128(c, mul) mul64x64_128(mul, modm_m[2], q3[2]) add128(c, mul)
+	r2[4] = lo128(c) & 0x0000ffffffffff;
+
+	pb = 0;
+	pb += r2[0]; b = lt_modm(r1[0], pb); r[0] = (r1[0] - pb + (b << 56)); pb = b;
+	pb += r2[1]; b = lt_modm(r1[1], pb); r[1] = (r1[1] - pb + (b << 56)); pb = b;
+	pb += r2[2]; b = lt_modm(r1[2], pb); r[2] = (r1[2] - pb + (b << 56)); pb = b;
+	pb += r2[3]; b = lt_modm(r1[3], pb); r[3] = (r1[3] - pb + (b << 56)); pb = b;
+	pb += r2[4]; b = lt_modm(r1[4], pb); r[4] = (r1[4] - pb + (b << 40)); 
+
+	reduce256_modm(r);
+	reduce256_modm(r);
+}
+
+
+static void
+add256_modm(bignum256modm r, const bignum256modm x, const bignum256modm y) {
+	bignum256modm_element_t c;
+
+	c  = x[0] + y[0]; r[0] = c & 0xffffffffffffff; c >>= 56;
+	c += x[1] + y[1]; r[1] = c & 0xffffffffffffff; c >>= 56;
+	c += x[2] + y[2]; r[2] = c & 0xffffffffffffff; c >>= 56;
+	c += x[3] + y[3]; r[3] = c & 0xffffffffffffff; c >>= 56;
+	c += x[4] + y[4]; r[4] = c;
+
+	reduce256_modm(r);
+}
+
+static void
+mul256_modm(bignum256modm r, const bignum256modm x, const bignum256modm y) {
+	bignum256modm q1, r1;
+	uint128_t c, mul;
+	bignum256modm_element_t f;
+
+	mul64x64_128(c, x[0], y[0])
+	f = lo128(c); r1[0] = f & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[0], y[1]) add128_64(c, f) mul64x64_128(mul, x[1], y[0]) add128(c, mul) 
+	f = lo128(c); r1[1] = f & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[0], y[2]) add128_64(c, f) mul64x64_128(mul, x[2], y[0]) add128(c, mul) mul64x64_128(mul, x[1], y[1]) add128(c, mul) 
+	f = lo128(c); r1[2] = f & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[0], y[3]) add128_64(c, f) mul64x64_128(mul, x[3], y[0]) add128(c, mul) mul64x64_128(mul, x[1], y[2]) add128(c, mul) mul64x64_128(mul, x[2], y[1]) add128(c, mul) 
+	f = lo128(c); r1[3] = f & 0xffffffffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[0], y[4]) add128_64(c, f) mul64x64_128(mul, x[4], y[0]) add128(c, mul) mul64x64_128(mul, x[3], y[1]) add128(c, mul) mul64x64_128(mul, x[1], y[3]) add128(c, mul) mul64x64_128(mul, x[2], y[2]) add128(c, mul) 
+	f = lo128(c); r1[4] = f & 0x0000ffffffffff; q1[0] = (f >> 24) & 0xffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[4], y[1]) add128_64(c, f) mul64x64_128(mul, x[1], y[4]) add128(c, mul) mul64x64_128(mul, x[2], y[3]) add128(c, mul) mul64x64_128(mul, x[3], y[2]) add128(c, mul) 
+	f = lo128(c); q1[0] |= (f << 32) & 0xffffffffffffff; q1[1] = (f >> 24) & 0xffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[4], y[2]) add128_64(c, f) mul64x64_128(mul, x[2], y[4]) add128(c, mul) mul64x64_128(mul, x[3], y[3]) add128(c, mul) 
+	f = lo128(c); q1[1] |= (f << 32) & 0xffffffffffffff; q1[2] = (f >> 24) & 0xffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[4], y[3]) add128_64(c, f) mul64x64_128(mul, x[3], y[4]) add128(c, mul) 
+	f = lo128(c); q1[2] |= (f << 32) & 0xffffffffffffff; q1[3] = (f >> 24) & 0xffffffff; shr128(f, c, 56);
+	mul64x64_128(c, x[4], y[4]) add128_64(c, f)
+	f = lo128(c); q1[3] |= (f << 32) & 0xffffffffffffff; q1[4] = (f >> 24) & 0xffffffff; shr128(f, c, 56);
+	q1[4] |= (f << 32);
+
+	barrett_reduce256_modm(r, q1, r1);
+}
+
+static void
+expand256_modm(bignum256modm out, const unsigned char *in, size_t len) {
+	unsigned char work[64] = {0};
+	bignum256modm_element_t x[16];
+	bignum256modm q1;
+
+	memcpy(work, in, len);
+	x[0] = U8TO64_LE(work +  0);
+	x[1] = U8TO64_LE(work +  8);
+	x[2] = U8TO64_LE(work + 16);
+	x[3] = U8TO64_LE(work + 24);
+	x[4] = U8TO64_LE(work + 32);
+	x[5] = U8TO64_LE(work + 40);
+	x[6] = U8TO64_LE(work + 48);
+	x[7] = U8TO64_LE(work + 56);
+
+	/* r1 = (x mod 256^(32+1)) = x mod (2^8)(31+1) = x & ((1 << 264) - 1) */
+	out[0] = (                         x[0]) & 0xffffffffffffff;
+	out[1] = ((x[ 0] >> 56) | (x[ 1] <<  8)) & 0xffffffffffffff;
+	out[2] = ((x[ 1] >> 48) | (x[ 2] << 16)) & 0xffffffffffffff;
+	out[3] = ((x[ 2] >> 40) | (x[ 3] << 24)) & 0xffffffffffffff;
+	out[4] = ((x[ 3] >> 32) | (x[ 4] << 32)) & 0x0000ffffffffff;
+
+	/* under 252 bits, no need to reduce */
+	if (len < 32)
+		return;
+
+	/* q1 = x >> 248 = 264 bits */
+	q1[0] = ((x[ 3] >> 56) | (x[ 4] <<  8)) & 0xffffffffffffff;
+	q1[1] = ((x[ 4] >> 48) | (x[ 5] << 16)) & 0xffffffffffffff;
+	q1[2] = ((x[ 5] >> 40) | (x[ 6] << 24)) & 0xffffffffffffff;
+	q1[3] = ((x[ 6] >> 32) | (x[ 7] << 32)) & 0xffffffffffffff;
+	q1[4] = ((x[ 7] >> 24)                );
+
+	barrett_reduce256_modm(out, q1, out);
+}
+
+static void
+expand_raw256_modm(bignum256modm out, const unsigned char in[32]) {
+	bignum256modm_element_t x[4];
+
+	x[0] = U8TO64_LE(in +  0);
+	x[1] = U8TO64_LE(in +  8);
+	x[2] = U8TO64_LE(in + 16);
+	x[3] = U8TO64_LE(in + 24);
+
+	out[0] = (                         x[0]) & 0xffffffffffffff;
+	out[1] = ((x[ 0] >> 56) | (x[ 1] <<  8)) & 0xffffffffffffff;
+	out[2] = ((x[ 1] >> 48) | (x[ 2] << 16)) & 0xffffffffffffff;
+	out[3] = ((x[ 2] >> 40) | (x[ 3] << 24)) & 0xffffffffffffff;
+	out[4] = ((x[ 3] >> 32)                ) & 0x000000ffffffff;
+}
+
+static void
+contract256_modm(unsigned char out[32], const bignum256modm in) {
+	U64TO8_LE(out +  0, (in[0]      ) | (in[1] << 56));
+	U64TO8_LE(out +  8, (in[1] >>  8) | (in[2] << 48));
+	U64TO8_LE(out + 16, (in[2] >> 16) | (in[3] << 40));
+	U64TO8_LE(out + 24, (in[3] >> 24) | (in[4] << 32));
+}
+
+static void
+contract256_window4_modm(signed char r[64], const bignum256modm in) {
+	char carry;
+	signed char *quads = r;
+	bignum256modm_element_t i, j, v, m;
+
+	for (i = 0; i < 5; i++) {
+		v = in[i];
+		m = (i == 4) ? 8 : 14;
+		for (j = 0; j < m; j++) {
+			*quads++ = (v & 15);
+			v >>= 4;
+		}
+	}
+
+	/* making it signed */
+	carry = 0;
+	for(i = 0; i < 63; i++) {
+		r[i] += carry;
+		r[i+1] += (r[i] >> 4);
+		r[i] &= 15;
+		carry = (r[i] >> 3);
+		r[i] -= (carry << 4);
+	}
+	r[63] += carry;
+}
+
+static void
+contract256_slidingwindow_modm(signed char r[256], const bignum256modm s, int windowsize) {
+	int i,j,k,b;
+	int m = (1 << (windowsize - 1)) - 1, soplen = 256;
+	signed char *bits = r;
+	bignum256modm_element_t v;
+
+	/* first put the binary expansion into r  */
+	for (i = 0; i < 4; i++) {
+		v = s[i];
+		for (j = 0; j < 56; j++, v >>= 1)
+			*bits++ = (v & 1);
+	}
+	v = s[4];
+	for (j = 0; j < 32; j++, v >>= 1)
+		*bits++ = (v & 1);
+
+	/* Making it sliding window */
+	for (j = 0; j < soplen; j++) {
+		if (!r[j])
+			continue;
+
+		for (b = 1; (b < (soplen - j)) && (b <= 6); b++) {
+			if ((r[j] + (r[j + b] << b)) <= m) {
+				r[j] += r[j + b] << b;
+				r[j + b] = 0;
+			} else if ((r[j] - (r[j + b] << b)) >= -m) {
+				r[j] -= r[j + b] << b;
+				for (k = j + b; k < soplen; k++) {
+					if (!r[k]) {
+						r[k] = 1;
+						break;
+					}
+					r[k] = 0;
+				}
+			} else if (r[j + b]) {
+				break;
+			}
+		}
+	}
+}
+
+/*
+	helpers for batch verifcation, are allowed to be vartime
+*/
+
+/* out = a - b, a must be larger than b */
+static void
+sub256_modm_batch(bignum256modm out, const bignum256modm a, const bignum256modm b, size_t limbsize) {
+	size_t i = 0;
+	bignum256modm_element_t carry = 0;
+	switch (limbsize) {
+		case 4: out[i] = (a[i] - b[i])        ; carry = (out[i] >> 63); out[i] &= 0xffffffffffffff; i++;
+		case 3: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 63); out[i] &= 0xffffffffffffff; i++;
+		case 2: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 63); out[i] &= 0xffffffffffffff; i++;
+		case 1: out[i] = (a[i] - b[i]) - carry; carry = (out[i] >> 63); out[i] &= 0xffffffffffffff; i++;
+		case 0: 
+		default: out[i] = (a[i] - b[i]) - carry;
+	}
+}
+
+
+/* is a < b */
+static int
+lt256_modm_batch(const bignum256modm a, const bignum256modm b, size_t limbsize) {
+	size_t i = 0;
+	bignum256modm_element_t t, carry = 0;
+	switch (limbsize) {
+		case 4: t = (a[i] - b[i])        ; carry = (t >> 63); i++;
+		case 3: t = (a[i] - b[i]) - carry; carry = (t >> 63); i++;
+		case 2: t = (a[i] - b[i]) - carry; carry = (t >> 63); i++;
+		case 1: t = (a[i] - b[i]) - carry; carry = (t >> 63); i++;
+		case 0: t = (a[i] - b[i]) - carry; carry = (t >> 63);
+	}
+	return (int)carry;
+}
+
+/* is a <= b */
+static int
+lte256_modm_batch(const bignum256modm a, const bignum256modm b, size_t limbsize) {
+	size_t i = 0;
+	bignum256modm_element_t t, carry = 0;
+	switch (limbsize) {
+		case 4: t = (b[i] - a[i])        ; carry = (t >> 63); i++;
+		case 3: t = (b[i] - a[i]) - carry; carry = (t >> 63); i++;
+		case 2: t = (b[i] - a[i]) - carry; carry = (t >> 63); i++;
+		case 1: t = (b[i] - a[i]) - carry; carry = (t >> 63); i++;
+		case 0: t = (b[i] - a[i]) - carry; carry = (t >> 63);
+	}
+	return (int)!carry;
+}
+
+/* is a == 0 */
+static int
+iszero256_modm_batch(const bignum256modm a) {
+	size_t i;
+	for (i = 0; i < 5; i++)
+		if (a[i])
+			return 0;
+	return 1;
+}
+
+/* is a == 1 */
+static int
+isone256_modm_batch(const bignum256modm a) {
+	size_t i;
+	for (i = 0; i < 5; i++)
+		if (a[i] != ((i) ? 0 : 1))
+			return 0;
+	return 1;
+}
+
+/* can a fit in to (at most) 128 bits */
+static int
+isatmost128bits256_modm_batch(const bignum256modm a) {
+	uint64_t mask =
+		((a[4]                   )  | /*  32 */
+		 (a[3]                   )  | /*  88 */
+		 (a[2] & 0xffffffffff0000));
+
+	return (mask == 0);
+}

src/external/ed25519-donna/readme_VALVE.txt

@@ -0,0 +1,12 @@
+ed25519-donna is an implementation of the Ed25519 public-key signature algorithm by Dan J Bernstein.
+
+Ed25519 is a 256-bit strength elliptical curve with 32-byte secret/public keys and 64-byte signatures.
+
+It is very fast, easy to implement securely in software, and fully public-domain.
+
+
+Downloaded 12/12/2013 from https://github.com/floodyberry/ed25519-donna
+
+
+
+Filenames containing VALVE are *not* entirely public domain - see individual files for details.

src/external/ed25519-donna/test-internals.c

@@ -0,0 +1,176 @@
+#include <stdio.h>
+#include "ed25519-donna.h"
+
+static int
+test_adds() {
+#if defined(HAVE_UINT128) && !defined(ED25519_SSE2)
+	/* largest result for each limb from a mult or square: all elements except r1 reduced, r1 overflowed as far as possible */
+	static const bignum25519 max_bignum = {
+		0x7ffffffffffff,0x8000000001230,0x7ffffffffffff,0x7ffffffffffff,0x7ffffffffffff
+	};
+
+	/* what max_bignum should fully reduce to */
+	static const unsigned char max_bignum_raw[32] = {
+		0x12,0x00,0x00,0x00,0x00,0x00,0x88,0x91,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
+	};
+
+	/* (max_bignum + max_bignum)^2 */
+	static const unsigned char max_bignum2_squared_raw[32] = {
+		0x10,0x05,0x00,0x00,0x00,0x00,0x80,0xdc,0x51,0x00,0x00,0x00,0x00,0x61,0xed,0x4a,
+		0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	};
+
+	/* ((max_bignum + max_bignum) + max_bignum)^2 */
+	static const unsigned char max_bignum3_squared_raw[32] = {
+		0x64,0x0b,0x00,0x00,0x00,0x00,0x20,0x30,0xb8,0x00,0x00,0x00,0x40,0x1a,0x96,0xe8,
+		0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	};
+#else
+	/* largest result for each limb from a mult or square: all elements except r1 reduced, r1 overflowed as far as possible */
+	static const bignum25519 ALIGN(16) max_bignum = {
+		0x3ffffff,0x2000300,0x3ffffff,0x1ffffff,0x3ffffff,
+		0x1ffffff,0x3ffffff,0x1ffffff,0x3ffffff,0x1ffffff
+	};
+
+	/* what max_bignum should fully reduce to */
+	static const unsigned char max_bignum2_squared_raw[32] = {
+		0x10,0x05,0x00,0x40,0xc2,0x06,0x40,0x80,0x41,0x02,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	};
+
+	/* (max_bignum * max_bignum) */
+	static const unsigned char max_bignum3_squared_raw[32] = {
+		0x64,0x0b,0x00,0x10,0x35,0x0f,0x90,0x60,0x13,0x05,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	};
+#endif
+	unsigned char result[32];
+	static const bignum25519 ALIGN(16) zero = {0};
+	bignum25519 ALIGN(16) a, b, c;
+	size_t i;
+
+	/* a = (max_bignum + max_bignum) */
+	curve25519_add(a, max_bignum, max_bignum);
+
+	/* b = ((max_bignum + max_bignum) * (max_bignum + max_bignum)) */
+	curve25519_mul(b, a, a);
+	curve25519_contract(result, b);
+	if (memcmp(result, max_bignum2_squared_raw, 32) != 0)
+		return -1;
+	curve25519_square(b, a);
+	curve25519_contract(result, b);
+	if (memcmp(result, max_bignum2_squared_raw, 32) != 0)
+		return -1;
+
+	/* b = (max_bignum + max_bignum + max_bignum) */
+	curve25519_add_after_basic(b, a, max_bignum);
+
+	/* a = ((max_bignum + max_bignum + max_bignum) * (max_bignum + max_bignum + max_bignum)) */
+	curve25519_mul(a, b, b);
+	curve25519_contract(result, a);
+	if (memcmp(result, max_bignum3_squared_raw, 32) != 0)
+		return -1;
+	curve25519_square(a, b);
+	curve25519_contract(result, a);
+	if (memcmp(result, max_bignum3_squared_raw, 32) != 0)
+		return -1;
+
+	return 0;
+}
+
+static int
+test_subs() {
+#if defined(HAVE_UINT128) && !defined(ED25519_SSE2)
+	/* largest result for each limb from a mult or square: all elements except r1 reduced, r1 overflowed as far as possible */
+	static const bignum25519 max_bignum = {
+		0x7ffffffffffff,0x8000000001230,0x7ffffffffffff,0x7ffffffffffff,0x7ffffffffffff
+	};
+
+	/* what max_bignum should fully reduce to */
+	static const unsigned char max_bignum_raw[32] = {
+		0x12,0x00,0x00,0x00,0x00,0x00,0x88,0x91,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
+	};
+
+	/* (max_bignum * max_bignum) */
+	static const unsigned char max_bignum_squared_raw[32] = {
+		0x44,0x01,0x00,0x00,0x00,0x00,0x20,0x77,0x14,0x00,0x00,0x00,0x40,0x58,0xbb,0x52,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
+	};
+#else
+	/* largest result for each limb from a mult or square: all elements except r1 reduced, r1 overflowed as far as possible */
+	static const bignum25519 ALIGN(16) max_bignum = {
+		0x3ffffff,0x2000300,0x3ffffff,0x1ffffff,0x3ffffff,
+		0x1ffffff,0x3ffffff,0x1ffffff,0x3ffffff,0x1ffffff
+	};
+
+	/* what max_bignum should fully reduce to */
+	static const unsigned char max_bignum_raw[32] = {
+		0x12,0x00,0x00,0x04,0x0c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	};
+
+	/* (max_bignum * max_bignum) */
+	static const unsigned char max_bignum_squared_raw[32] = {
+		0x44,0x01,0x00,0x90,0xb0,0x01,0x10,0x60,0x90,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	};
+#endif
+	unsigned char result[32];
+	static const bignum25519 ALIGN(16) zero = {0};
+	bignum25519 ALIGN(16) a, b, c;
+	size_t i;
+
+	/* a = max_bignum - 0, which expands to 2p + max_bignum - 0 */
+	curve25519_sub(a, max_bignum, zero);
+	curve25519_contract(result, a);
+	if (memcmp(result, max_bignum_raw, 32) != 0)
+		return -1;
+
+	/* b = (max_bignum * max_bignum) */
+	curve25519_mul(b, a, a);
+	curve25519_contract(result, b);
+	if (memcmp(result, max_bignum_squared_raw, 32) != 0)
+		return -1;
+	curve25519_square(b, a);
+	curve25519_contract(result, b);
+	if (memcmp(result, max_bignum_squared_raw, 32) != 0)
+		return -1;
+
+	/* b = ((a - 0) - 0) */
+	curve25519_sub_after_basic(b, a, zero);
+	curve25519_contract(result, b);
+	if (memcmp(result, max_bignum_raw, 32) != 0)
+		return -1;
+
+	/* a = (max_bignum * max_bignum) */
+	curve25519_mul(a, b, b);
+	curve25519_contract(result, a);
+	if (memcmp(result, max_bignum_squared_raw, 32) != 0)
+		return -1;
+	curve25519_square(a, b);
+	curve25519_contract(result, a);
+	if (memcmp(result, max_bignum_squared_raw, 32) != 0)
+		return -1;
+
+
+	return 0;
+}
+
+
+int
+main() {
+	int ret = 0;
+	int single;
+	single = test_adds();
+	if (single) printf("test_adds: FAILED\n");
+	ret |= single;
+	single = test_subs();
+	if (single) printf("test_subs: FAILED\n");
+	ret |= single;
+	if (!ret) printf("success\n");
+	return ret;
+}
+
+

src/external/ed25519-donna/test-ticks.h

@@ -0,0 +1,50 @@
+#include "ed25519-donna-portable-identify.h"
+
+/* ticks - not tested on anything other than x86 */
+static uint64_t
+get_ticks(void) {
+#if defined(CPU_X86) || defined(CPU_X86_64)
+	#if defined(COMPILER_INTEL)
+		return _rdtsc();
+	#elif defined(COMPILER_MSVC)
+		return __rdtsc();
+	#elif defined(COMPILER_GCC)
+		uint32_t lo, hi;
+		__asm__ __volatile__("rdtsc" : "=a" (lo), "=d" (hi));
+		return ((uint64_t)lo | ((uint64_t)hi << 32));
+	#else
+		need rdtsc for this compiler
+	#endif
+#elif defined(OS_SOLARIS)
+	return (uint64_t)gethrtime();
+#elif defined(CPU_SPARC) && !defined(OS_OPENBSD)
+	uint64_t t;
+	__asm__ __volatile__("rd %%tick, %0" : "=r" (t));
+	return t;
+#elif defined(CPU_PPC)
+	uint32_t lo = 0, hi = 0;
+	__asm__ __volatile__("mftbu %0; mftb %1" : "=r" (hi), "=r" (lo));
+	return ((uint64_t)lo | ((uint64_t)hi << 32));
+#elif defined(CPU_IA64)
+	uint64_t t;
+	__asm__ __volatile__("mov %0=ar.itc" : "=r" (t));
+	return t;
+#elif defined(OS_NIX)
+	timeval t2;
+	gettimeofday(&t2, NULL);
+	t = ((uint64_t)t2.tv_usec << 32) | (uint64_t)t2.tv_sec;
+	return t;
+#else
+	need ticks for this platform
+#endif
+}
+
+#define timeit(x,minvar)         \
+	ticks = get_ticks();         \
+ 	x;                           \
+	ticks = get_ticks() - ticks; \
+	if (ticks < minvar)          \
+		minvar = ticks;
+
+#define maxticks 0xffffffffffffffffull
+

src/external/ed25519-donna/test.c

@@ -0,0 +1,260 @@
+/*
+	Validate ed25519 implementation against the official test vectors from 
+	http://ed25519.cr.yp.to/software.html
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include "ed25519.h"
+
+#include "test-ticks.h"
+
+static void
+edassert(int check, int round, const char *failreason) {
+	if (check)
+		return;
+	printf("round %d, %s\n", round, failreason);
+	exit(1);
+}
+
+static void
+edassert_die(const unsigned char *a, const unsigned char *b, size_t len, int round, const char *failreason) {
+	size_t i;
+	if (round > 0)
+		printf("round %d, %s\n", round, failreason);
+	else
+		printf("%s\n", failreason);
+	printf("want: "); for (i = 0; i < len; i++) printf("%02x,", a[i]); printf("\n");
+	printf("got : "); for (i = 0; i < len; i++) printf("%02x,", b[i]); printf("\n");
+	printf("diff: "); for (i = 0; i < len; i++) if (a[i] ^ b[i]) printf("%02x,", a[i] ^ b[i]); else printf("  ,"); printf("\n\n");
+	exit(1);
+}
+
+static void
+edassert_equal(const unsigned char *a, const unsigned char *b, size_t len, const char *failreason) {
+	if (memcmp(a, b, len) == 0)
+		return;
+	edassert_die(a, b, len, -1, failreason);
+}
+
+static void
+edassert_equal_round(const unsigned char *a, const unsigned char *b, size_t len, int round, const char *failreason) {
+	if (memcmp(a, b, len) == 0)
+		return;
+	edassert_die(a, b, len, round, failreason);
+}
+
+
+/* test data */
+typedef struct test_data_t {
+	unsigned char sk[32], pk[32], sig[64];
+	const char *m;
+} test_data;
+
+
+test_data dataset[] = {
+#include "regression.h"
+};
+
+/* result of the curve25519 scalarmult ((|255| * basepoint) * basepoint)... 1024 times */
+const curved25519_key curved25519_expected = {
+	0xac,0xce,0x24,0xb1,0xd4,0xa2,0x36,0x21,
+	0x15,0xe2,0x3e,0x84,0x3c,0x23,0x2b,0x5f,
+	0x95,0x6c,0xc0,0x7b,0x95,0x82,0xd7,0x93,
+	0xd5,0x19,0xb6,0xf1,0xfb,0x96,0xd6,0x04
+};
+
+
+/* from ed25519-donna-batchverify.h */
+extern unsigned char batch_point_buffer[3][32];
+
+/* y coordinate of the final point from 'amd64-51-30k' with the same random generator */
+static const unsigned char batch_verify_y[32] = {
+	0x51,0xe7,0x68,0xe0,0xf7,0xa1,0x88,0x45,
+	0xde,0xa1,0xcb,0xd9,0x37,0xd4,0x78,0x53,
+	0x1b,0x95,0xdb,0xbe,0x66,0x59,0x29,0x3b,
+	0x94,0x51,0x2f,0xbc,0x0d,0x66,0xba,0x3f
+};
+
+/*
+static const unsigned char batch_verify_y[32] = {
+	0x5c,0x63,0x96,0x26,0xca,0xfe,0xfd,0xc4,
+	0x2d,0x11,0xa8,0xe4,0xc4,0x46,0x42,0x97,
+	0x97,0x92,0xbe,0xe0,0x3c,0xef,0x96,0x01,
+	0x50,0xa1,0xcc,0x8f,0x50,0x85,0x76,0x7d
+};
+
+Introducing the 128 bit r scalars to the heap _before_ the largest scalar
+fits in to 128 bits alters the heap shape and produces a different,
+yet still neutral/valid y/z value.
+
+This was the value of introducing the r scalars when the largest scalar fit
+in to 135-256 bits. You can produce it with amd64-64-24k / amd64-51-32k
+with the random sequence used in the first pass by changing
+
+    unsigned long long hlen=((npoints+1)/2)|1;
+
+to
+
+    unsigned long long hlen=npoints;
+
+in ge25519_multi_scalarmult.c
+
+ed25519-donna-batchverify.h has been modified to match the 
+default amd64-64-24k / amd64-51-32k behaviour
+*/
+
+
+
+/* batch test */
+#define test_batch_count 64
+#define test_batch_rounds 96
+
+typedef enum batch_test_t {
+	batch_no_errors = 0,
+	batch_wrong_message = 1,
+	batch_wrong_pk = 2,
+	batch_wrong_sig = 3
+} batch_test;
+
+static int
+test_batch_instance(batch_test type, uint64_t *ticks) {
+	ed25519_secret_key sks[test_batch_count];
+	ed25519_public_key pks[test_batch_count];
+	ed25519_signature sigs[test_batch_count];
+	unsigned char messages[test_batch_count][128];
+	size_t message_lengths[test_batch_count];
+	const unsigned char *message_pointers[test_batch_count];
+	const unsigned char *pk_pointers[test_batch_count];
+	const unsigned char *sig_pointers[test_batch_count];
+	int valid[test_batch_count], ret, validret;
+	size_t i;
+	uint64_t t;
+
+	/* generate keys */
+	for (i = 0; i < test_batch_count; i++) {
+		ed25519_randombytes_unsafe(sks[i], sizeof(sks[i]));
+		ed25519_publickey(sks[i], pks[i]);
+		pk_pointers[i] = pks[i];
+	}
+
+	/* generate messages */
+	ed25519_randombytes_unsafe(messages, sizeof(messages));
+	for (i = 0; i < test_batch_count; i++) {
+		message_pointers[i] = messages[i];
+		message_lengths[i] = (i & 127) + 1;
+	}
+
+	/* sign messages */
+	for (i = 0; i < test_batch_count; i++) {
+		ed25519_sign(message_pointers[i], message_lengths[i], sks[i], pks[i], sigs[i]);
+		sig_pointers[i] = sigs[i];
+	}
+
+	validret = 0;
+	if (type == batch_wrong_message) {
+		message_pointers[0] = message_pointers[1];
+		validret = 1|2;
+	} else if (type == batch_wrong_pk) {
+		pk_pointers[0] = pk_pointers[1];
+		validret = 1|2;
+	} else if (type == batch_wrong_sig) {
+		sig_pointers[0] = sig_pointers[1];
+		validret = 1|2;
+	}
+
+	/* batch verify */
+	t = get_ticks();
+	ret = ed25519_sign_open_batch(message_pointers, message_lengths, pk_pointers, sig_pointers, test_batch_count, valid);
+	*ticks = get_ticks() - t;
+	edassert_equal((unsigned char *)&validret, (unsigned char *)&ret, sizeof(int), "batch return code");
+	for (i = 0; i < test_batch_count; i++) {
+		validret = ((type == batch_no_errors) || (i != 0)) ? 1 : 0;
+		edassert_equal((unsigned char *)&validret, (unsigned char *)&valid[i], sizeof(int), "individual batch return code");
+	}
+	return ret;
+}
+
+static void
+test_batch(void) {
+	uint64_t dummy_ticks, ticks[test_batch_rounds], best = maxticks, sum;
+	size_t i, count;
+
+	/* check the first pass for the expected result */
+	test_batch_instance(batch_no_errors, &dummy_ticks);
+	edassert_equal(batch_verify_y, batch_point_buffer[1], 32, "failed to generate expected result");
+
+	/* make sure ge25519_multi_scalarmult_vartime throws an error on the entire batch with wrong data */
+	for (i = 0; i < 4; i++) {
+		test_batch_instance(batch_wrong_message, &dummy_ticks);
+		test_batch_instance(batch_wrong_pk, &dummy_ticks);
+		test_batch_instance(batch_wrong_sig, &dummy_ticks);
+	}
+
+	/* speed test */
+	for (i = 0; i < test_batch_rounds; i++) {
+		test_batch_instance(batch_no_errors, &ticks[i]);
+		if (ticks[i] < best)
+			best = ticks[i];
+	}
+
+	/* take anything within 1% of the best time */
+	for (i = 0, sum = 0, count = 0; i < test_batch_rounds; i++) {
+		if (ticks[i] < (best * 1.01)) {
+			sum += ticks[i];
+			count++;
+		}
+	}
+	printf("%.0f ticks/verification\n", (double)sum / (count * test_batch_count));
+}
+
+static void
+test_main(void) {
+	int i, res;
+	ed25519_public_key pk;
+	ed25519_signature sig;
+	unsigned char forge[1024] = {'x'};
+	curved25519_key csk[2] = {{255}};
+	uint64_t ticks, pkticks = maxticks, signticks = maxticks, openticks = maxticks, curvedticks = maxticks;
+
+	for (i = 0; i < 1024; i++) {
+		ed25519_publickey(dataset[i].sk, pk);
+		edassert_equal_round(dataset[i].pk, pk, sizeof(pk), i, "public key didn't match");
+		ed25519_sign((unsigned char *)dataset[i].m, i, dataset[i].sk, pk, sig);
+		edassert_equal_round(dataset[i].sig, sig, sizeof(sig), i, "signature didn't match");
+		edassert(!ed25519_sign_open((unsigned char *)dataset[i].m, i, pk, sig), i, "failed to open message");
+
+		memcpy(forge, dataset[i].m, i);
+		if (i)
+			forge[i - 1] += 1;
+
+		edassert(ed25519_sign_open(forge, (i) ? i : 1, pk, sig), i, "opened forged message");
+	}
+
+	for (i = 0; i < 1024; i++)
+		curved25519_scalarmult_basepoint(csk[(i & 1) ^ 1], csk[i & 1]);
+	edassert_equal(curved25519_expected, csk[0], sizeof(curved25519_key), "curve25519 failed to generate correct value");
+
+	for (i = 0; i < 2048; i++) {
+		timeit(ed25519_publickey(dataset[0].sk, pk), pkticks)
+		edassert_equal_round(dataset[0].pk, pk, sizeof(pk), i, "public key didn't match");
+		timeit(ed25519_sign((unsigned char *)dataset[0].m, 0, dataset[0].sk, pk, sig), signticks)
+		edassert_equal_round(dataset[0].sig, sig, sizeof(sig), i, "signature didn't match");
+		timeit(res = ed25519_sign_open((unsigned char *)dataset[0].m, 0, pk, sig), openticks)
+		edassert(!res, 0, "failed to open message");
+		timeit(curved25519_scalarmult_basepoint(csk[1], csk[0]), curvedticks);
+	}
+
+	printf("%.0f ticks/public key generation\n", (double)pkticks);
+	printf("%.0f ticks/signature\n", (double)signticks);
+	printf("%.0f ticks/signature verification\n", (double)openticks);
+	printf("%.0f ticks/curve25519 basepoint scalarmult\n", (double)curvedticks);
+}
+
+int
+main(void) {
+	test_main();
+	test_batch();
+	return 0;
+}
+

src/external/ujson/LICENSE-3RD-PARTY.md

@@ -0,0 +1,85 @@
+Licenses for 3rd party libraries:
+
+µjson uses three libraries:
+
+1) double-conversion, a library for double<->ascii conversion
+2) re2c, a program for generating scanners
+3) Catch, a small unit testing framework
+
+------------------------------------------------------------------------------
+
+double-conversion (https://code.google.com/p/double-conversion)
+
+Copyright 2006-2011, the V8 project authors. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of Google Inc. nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+------------------------------------------------------------------------------
+
+re2c (http://re2c.org)
+
+re2c is distributed with no warranty whatever.  The code is certain to
+contain errors.  Neither the author nor any contributor takes
+responsibility for any consequences of its use.
+
+re2c is in the public domain.  The data structures and algorithms used
+in re2c are all either taken from documents available to the general
+public or are inventions of the author.  Programs generated by re2c may
+be distributed freely.  re2c itself may be distributed freely, in source
+or binary, unchanged or modified.  Distributors may charge whatever fees
+they can obtain for re2c.
+
+If you do make use of re2c, or incorporate it into a larger project an
+acknowledgement somewhere (documentation, research report, etc.) would
+be appreciated.
+
+------------------------------------------------------------------------------
+
+Catch (https://github.com/philsquared/Catch)
+
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

src/external/ujson/LICENSE.md

@@ -0,0 +1,19 @@
+Copyright (c) 2014 Anders Wang Kristensen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

src/external/ujson/ujson/double-conversion.h

@@ -0,0 +1,695 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef DOUBLE_CONVERSION_DOUBLE_CONVERSION_H_
+#define DOUBLE_CONVERSION_DOUBLE_CONVERSION_H_
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef ASSERT
+#define ASSERT(condition)         \
+    assert(condition);
+#endif
+
+// A macro to disallow the evil copy constructor and operator= functions
+// This should be used in the private: declarations for a class
+#ifndef DISALLOW_COPY_AND_ASSIGN
+#define DISALLOW_COPY_AND_ASSIGN(TypeName)      \
+  TypeName(const TypeName&);                    \
+  void operator=(const TypeName&)
+#endif
+
+// A macro to disallow all the implicit constructors, namely the
+// default constructor, copy constructor and operator= functions.
+//
+// This should be used in the private: declarations for a class
+// that wants to prevent anyone from instantiating it. This is
+// especially useful for classes containing only static methods.
+#ifndef DISALLOW_IMPLICIT_CONSTRUCTORS
+#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
+  TypeName();                                    \
+  DISALLOW_COPY_AND_ASSIGN(TypeName)
+#endif
+
+// @FDVALVE Ug
+#ifdef __GNUC__
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wshadow"
+#endif
+
+namespace double_conversion {
+
+inline int StrLength(const char* string) {
+    size_t length = strlen(string);
+    ASSERT(length == static_cast<size_t>(static_cast<int>(length)));
+    return static_cast<int>(length);
+}
+
+static const int kCharSize = sizeof(char);
+
+// This is a simplified version of V8's Vector class.
+template <typename T>
+class Vector {
+public:
+    Vector() : start_(NULL), length_(0) {}
+    Vector(T* data, int length) : start_(data), length_(length) {
+        ASSERT(length == 0 || (length > 0 && data != NULL));
+    }
+
+    // Returns a vector using the same backing storage as this one,
+    // spanning from and including 'from', to but not including 'to'.
+    Vector<T> SubVector(int from, int to) {
+        ASSERT(to <= length_);
+        ASSERT(from < to);
+        ASSERT(0 <= from);
+        return Vector<T>(start() + from, to - from);
+    }
+
+    // Returns the length of the vector.
+    int length() const { return length_; }
+
+    // Returns whether or not the vector is empty.
+    bool is_empty() const { return length_ == 0; }
+
+    // Returns the pointer to the start of the data in the vector.
+    T* start() const { return start_; }
+
+    // Access individual vector elements - checks bounds in debug mode.
+    T& operator[](int index) const {
+        ASSERT(0 <= index && index < length_);
+        return start_[index];
+    }
+
+    T& first() { return start_[0]; }
+
+    T& last() { return start_[length_ - 1]; }
+
+private:
+    T* start_;
+    int length_;
+};
+
+// Helper class for building result strings in a character buffer. The
+// purpose of the class is to use safe operations that checks the
+// buffer bounds on all operations in debug mode.
+class StringBuilder {
+public:
+    StringBuilder(char* buffer, int size)
+        : buffer_(buffer, size), position_(0) { }
+
+    ~StringBuilder() { if (!is_finalized()) Finalize(); }
+
+    int size() const { return buffer_.length(); }
+
+    // Get the current position in the builder.
+    int position() const {
+        ASSERT(!is_finalized());
+        return position_;
+    }
+
+    // Reset the position.
+    void Reset() { position_ = 0; }
+
+    // Add a single character to the builder. It is not allowed to add
+    // 0-characters; use the Finalize() method to terminate the string
+    // instead.
+    void AddCharacter(char c) {
+        ASSERT(c != '\0');
+        ASSERT(!is_finalized() && position_ < buffer_.length());
+        buffer_[position_++] = c;
+    }
+
+    // Add an entire string to the builder. Uses strlen() internally to
+    // compute the length of the input string.
+    void AddString(const char* s) {
+        AddSubstring(s, StrLength(s));
+    }
+
+    // Add the first 'n' characters of the given string 's' to the
+    // builder. The input string must have enough characters.
+    void AddSubstring(const char* s, int n) {
+        ASSERT(!is_finalized() && position_ + n < buffer_.length());
+        ASSERT(static_cast<size_t>(n) <= strlen(s));
+        memmove(&buffer_[position_], s, n * kCharSize);
+        position_ += n;
+    }
+
+
+    // Add character padding to the builder. If count is non-positive,
+    // nothing is added to the builder.
+    void AddPadding(char c, int count) {
+        for (int i = 0; i < count; i++) {
+            AddCharacter(c);
+        }
+    }
+
+    // Finalize the string by 0-terminating it and returning the buffer.
+    char* Finalize() {
+        ASSERT(!is_finalized() && position_ < buffer_.length());
+        buffer_[position_] = '\0';
+        // Make sure nobody managed to add a 0-character to the
+        // buffer while building the string.
+        ASSERT(strlen(buffer_.start()) == static_cast<size_t>(position_));
+        position_ = -1;
+        ASSERT(is_finalized());
+        return buffer_.start();
+    }
+
+private:
+    Vector<char> buffer_;
+    int position_;
+
+    bool is_finalized() const { return position_ < 0; }
+
+    DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
+};
+
+
+class DoubleToStringConverter {
+ public:
+  // When calling ToFixed with a double > 10^kMaxFixedDigitsBeforePoint
+  // or a requested_digits parameter > kMaxFixedDigitsAfterPoint then the
+  // function returns false.
+  static const int kMaxFixedDigitsBeforePoint = 60;
+  static const int kMaxFixedDigitsAfterPoint = 60;
+
+  // When calling ToExponential with a requested_digits
+  // parameter > kMaxExponentialDigits then the function returns false.
+  static const int kMaxExponentialDigits = 120;
+
+  // When calling ToPrecision with a requested_digits
+  // parameter < kMinPrecisionDigits or requested_digits > kMaxPrecisionDigits
+  // then the function returns false.
+  static const int kMinPrecisionDigits = 1;
+  static const int kMaxPrecisionDigits = 120;
+
+  enum Flags {
+    NO_FLAGS = 0,
+    EMIT_POSITIVE_EXPONENT_SIGN = 1,
+    EMIT_TRAILING_DECIMAL_POINT = 2,
+    EMIT_TRAILING_ZERO_AFTER_POINT = 4,
+    UNIQUE_ZERO = 8
+  };
+
+  // Flags should be a bit-or combination of the possible Flags-enum.
+  //  - NO_FLAGS: no special flags.
+  //  - EMIT_POSITIVE_EXPONENT_SIGN: when the number is converted into exponent
+  //    form, emits a '+' for positive exponents. Example: 1.2e+2.
+  //  - EMIT_TRAILING_DECIMAL_POINT: when the input number is an integer and is
+  //    converted into decimal format then a trailing decimal point is appended.
+  //    Example: 2345.0 is converted to "2345.".
+  //  - EMIT_TRAILING_ZERO_AFTER_POINT: in addition to a trailing decimal point
+  //    emits a trailing '0'-character. This flag requires the
+  //    EXMIT_TRAILING_DECIMAL_POINT flag.
+  //    Example: 2345.0 is converted to "2345.0".
+  //  - UNIQUE_ZERO: "-0.0" is converted to "0.0".
+  //
+  // Infinity symbol and nan_symbol provide the string representation for these
+  // special values. If the string is NULL and the special value is encountered
+  // then the conversion functions return false.
+  //
+  // The exponent_character is used in exponential representations. It is
+  // usually 'e' or 'E'.
+  //
+  // When converting to the shortest representation the converter will
+  // represent input numbers in decimal format if they are in the interval
+  // [10^decimal_in_shortest_low; 10^decimal_in_shortest_high[
+  //    (lower boundary included, greater boundary excluded).
+  // Example: with decimal_in_shortest_low = -6 and
+  //               decimal_in_shortest_high = 21:
+  //   ToShortest(0.000001)  -> "0.000001"
+  //   ToShortest(0.0000001) -> "1e-7"
+  //   ToShortest(111111111111111111111.0)  -> "111111111111111110000"
+  //   ToShortest(100000000000000000000.0)  -> "100000000000000000000"
+  //   ToShortest(1111111111111111111111.0) -> "1.1111111111111111e+21"
+  //
+  // When converting to precision mode the converter may add
+  // max_leading_padding_zeroes before returning the number in exponential
+  // format.
+  // Example with max_leading_padding_zeroes_in_precision_mode = 6.
+  //   ToPrecision(0.0000012345, 2) -> "0.0000012"
+  //   ToPrecision(0.00000012345, 2) -> "1.2e-7"
+  // Similarily the converter may add up to
+  // max_trailing_padding_zeroes_in_precision_mode in precision mode to avoid
+  // returning an exponential representation. A zero added by the
+  // EMIT_TRAILING_ZERO_AFTER_POINT flag is counted for this limit.
+  // Examples for max_trailing_padding_zeroes_in_precision_mode = 1:
+  //   ToPrecision(230.0, 2) -> "230"
+  //   ToPrecision(230.0, 2) -> "230."  with EMIT_TRAILING_DECIMAL_POINT.
+  //   ToPrecision(230.0, 2) -> "2.3e2" with EMIT_TRAILING_ZERO_AFTER_POINT.
+  DoubleToStringConverter(int flags,
+                          const char* infinity_symbol,
+                          const char* nan_symbol,
+                          char exponent_character,
+                          int decimal_in_shortest_low,
+                          int decimal_in_shortest_high,
+                          int max_leading_padding_zeroes_in_precision_mode,
+                          int max_trailing_padding_zeroes_in_precision_mode)
+      : flags_(flags),
+        infinity_symbol_(infinity_symbol),
+        nan_symbol_(nan_symbol),
+        exponent_character_(exponent_character),
+        decimal_in_shortest_low_(decimal_in_shortest_low),
+        decimal_in_shortest_high_(decimal_in_shortest_high),
+        max_leading_padding_zeroes_in_precision_mode_(
+            max_leading_padding_zeroes_in_precision_mode),
+        max_trailing_padding_zeroes_in_precision_mode_(
+            max_trailing_padding_zeroes_in_precision_mode) {
+    // When 'trailing zero after the point' is set, then 'trailing point'
+    // must be set too.
+    ASSERT(((flags & EMIT_TRAILING_DECIMAL_POINT) != 0) ||
+        !((flags & EMIT_TRAILING_ZERO_AFTER_POINT) != 0));
+  }
+
+  // Returns a converter following the EcmaScript specification.
+  static const DoubleToStringConverter& EcmaScriptConverter();
+
+  // Computes the shortest string of digits that correctly represent the input
+  // number. Depending on decimal_in_shortest_low and decimal_in_shortest_high
+  // (see constructor) it then either returns a decimal representation, or an
+  // exponential representation.
+  // Example with decimal_in_shortest_low = -6,
+  //              decimal_in_shortest_high = 21,
+  //              EMIT_POSITIVE_EXPONENT_SIGN activated, and
+  //              EMIT_TRAILING_DECIMAL_POINT deactived:
+  //   ToShortest(0.000001)  -> "0.000001"
+  //   ToShortest(0.0000001) -> "1e-7"
+  //   ToShortest(111111111111111111111.0)  -> "111111111111111110000"
+  //   ToShortest(100000000000000000000.0)  -> "100000000000000000000"
+  //   ToShortest(1111111111111111111111.0) -> "1.1111111111111111e+21"
+  //
+  // Note: the conversion may round the output if the returned string
+  // is accurate enough to uniquely identify the input-number.
+  // For example the most precise representation of the double 9e59 equals
+  // "899999999999999918767229449717619953810131273674690656206848", but
+  // the converter will return the shorter (but still correct) "9e59".
+  //
+  // Returns true if the conversion succeeds. The conversion always succeeds
+  // except when the input value is special and no infinity_symbol or
+  // nan_symbol has been given to the constructor.
+  bool ToShortest(double value, StringBuilder* result_builder) const {
+    return ToShortestIeeeNumber(value, result_builder, SHORTEST);
+  }
+
+  // Same as ToShortest, but for single-precision floats.
+  bool ToShortestSingle(float value, StringBuilder* result_builder) const {
+    return ToShortestIeeeNumber(value, result_builder, SHORTEST_SINGLE);
+  }
+
+
+  // Computes a decimal representation with a fixed number of digits after the
+  // decimal point. The last emitted digit is rounded.
+  //
+  // Examples:
+  //   ToFixed(3.12, 1) -> "3.1"
+  //   ToFixed(3.1415, 3) -> "3.142"
+  //   ToFixed(1234.56789, 4) -> "1234.5679"
+  //   ToFixed(1.23, 5) -> "1.23000"
+  //   ToFixed(0.1, 4) -> "0.1000"
+  //   ToFixed(1e30, 2) -> "1000000000000000019884624838656.00"
+  //   ToFixed(0.1, 30) -> "0.100000000000000005551115123126"
+  //   ToFixed(0.1, 17) -> "0.10000000000000001"
+  //
+  // If requested_digits equals 0, then the tail of the result depends on
+  // the EMIT_TRAILING_DECIMAL_POINT and EMIT_TRAILING_ZERO_AFTER_POINT.
+  // Examples, for requested_digits == 0,
+  //   let EMIT_TRAILING_DECIMAL_POINT and EMIT_TRAILING_ZERO_AFTER_POINT be
+  //    - false and false: then 123.45 -> 123
+  //                             0.678 -> 1
+  //    - true and false: then 123.45 -> 123.
+  //                            0.678 -> 1.
+  //    - true and true: then 123.45 -> 123.0
+  //                           0.678 -> 1.0
+  //
+  // Returns true if the conversion succeeds. The conversion always succeeds
+  // except for the following cases:
+  //   - the input value is special and no infinity_symbol or nan_symbol has
+  //     been provided to the constructor,
+  //   - 'value' > 10^kMaxFixedDigitsBeforePoint, or
+  //   - 'requested_digits' > kMaxFixedDigitsAfterPoint.
+  // The last two conditions imply that the result will never contain more than
+  // 1 + kMaxFixedDigitsBeforePoint + 1 + kMaxFixedDigitsAfterPoint characters
+  // (one additional character for the sign, and one for the decimal point).
+  bool ToFixed(double value,
+               int requested_digits,
+               StringBuilder* result_builder) const;
+
+  // Computes a representation in exponential format with requested_digits
+  // after the decimal point. The last emitted digit is rounded.
+  // If requested_digits equals -1, then the shortest exponential representation
+  // is computed.
+  //
+  // Examples with EMIT_POSITIVE_EXPONENT_SIGN deactivated, and
+  //               exponent_character set to 'e'.
+  //   ToExponential(3.12, 1) -> "3.1e0"
+  //   ToExponential(5.0, 3) -> "5.000e0"
+  //   ToExponential(0.001, 2) -> "1.00e-3"
+  //   ToExponential(3.1415, -1) -> "3.1415e0"
+  //   ToExponential(3.1415, 4) -> "3.1415e0"
+  //   ToExponential(3.1415, 3) -> "3.142e0"
+  //   ToExponential(123456789000000, 3) -> "1.235e14"
+  //   ToExponential(1000000000000000019884624838656.0, -1) -> "1e30"
+  //   ToExponential(1000000000000000019884624838656.0, 32) ->
+  //                     "1.00000000000000001988462483865600e30"
+  //   ToExponential(1234, 0) -> "1e3"
+  //
+  // Returns true if the conversion succeeds. The conversion always succeeds
+  // except for the following cases:
+  //   - the input value is special and no infinity_symbol or nan_symbol has
+  //     been provided to the constructor,
+  //   - 'requested_digits' > kMaxExponentialDigits.
+  // The last condition implies that the result will never contain more than
+  // kMaxExponentialDigits + 8 characters (the sign, the digit before the
+  // decimal point, the decimal point, the exponent character, the
+  // exponent's sign, and at most 3 exponent digits).
+  bool ToExponential(double value,
+                     int requested_digits,
+                     StringBuilder* result_builder) const;
+
+  // Computes 'precision' leading digits of the given 'value' and returns them
+  // either in exponential or decimal format, depending on
+  // max_{leading|trailing}_padding_zeroes_in_precision_mode (given to the
+  // constructor).
+  // The last computed digit is rounded.
+  //
+  // Example with max_leading_padding_zeroes_in_precision_mode = 6.
+  //   ToPrecision(0.0000012345, 2) -> "0.0000012"
+  //   ToPrecision(0.00000012345, 2) -> "1.2e-7"
+  // Similarily the converter may add up to
+  // max_trailing_padding_zeroes_in_precision_mode in precision mode to avoid
+  // returning an exponential representation. A zero added by the
+  // EMIT_TRAILING_ZERO_AFTER_POINT flag is counted for this limit.
+  // Examples for max_trailing_padding_zeroes_in_precision_mode = 1:
+  //   ToPrecision(230.0, 2) -> "230"
+  //   ToPrecision(230.0, 2) -> "230."  with EMIT_TRAILING_DECIMAL_POINT.
+  //   ToPrecision(230.0, 2) -> "2.3e2" with EMIT_TRAILING_ZERO_AFTER_POINT.
+  // Examples for max_trailing_padding_zeroes_in_precision_mode = 3, and no
+  //    EMIT_TRAILING_ZERO_AFTER_POINT:
+  //   ToPrecision(123450.0, 6) -> "123450"
+  //   ToPrecision(123450.0, 5) -> "123450"
+  //   ToPrecision(123450.0, 4) -> "123500"
+  //   ToPrecision(123450.0, 3) -> "123000"
+  //   ToPrecision(123450.0, 2) -> "1.2e5"
+  //
+  // Returns true if the conversion succeeds. The conversion always succeeds
+  // except for the following cases:
+  //   - the input value is special and no infinity_symbol or nan_symbol has
+  //     been provided to the constructor,
+  //   - precision < kMinPericisionDigits
+  //   - precision > kMaxPrecisionDigits
+  // The last condition implies that the result will never contain more than
+  // kMaxPrecisionDigits + 7 characters (the sign, the decimal point, the
+  // exponent character, the exponent's sign, and at most 3 exponent digits).
+  bool ToPrecision(double value,
+                   int precision,
+                   StringBuilder* result_builder) const;
+
+  enum DtoaMode {
+    // Produce the shortest correct representation.
+    // For example the output of 0.299999999999999988897 is (the less accurate
+    // but correct) 0.3.
+    SHORTEST,
+    // Same as SHORTEST, but for single-precision floats.
+    SHORTEST_SINGLE,
+    // Produce a fixed number of digits after the decimal point.
+    // For instance fixed(0.1, 4) becomes 0.1000
+    // If the input number is big, the output will be big.
+    FIXED,
+    // Fixed number of digits (independent of the decimal point).
+    PRECISION
+  };
+
+  // The maximal number of digits that are needed to emit a double in base 10.
+  // A higher precision can be achieved by using more digits, but the shortest
+  // accurate representation of any double will never use more digits than
+  // kBase10MaximalLength.
+  // Note that DoubleToAscii null-terminates its input. So the given buffer
+  // should be at least kBase10MaximalLength + 1 characters long.
+  static const int kBase10MaximalLength = 17;
+
+  // Converts the given double 'v' to ascii. 'v' must not be NaN, +Infinity, or
+  // -Infinity. In SHORTEST_SINGLE-mode this restriction also applies to 'v'
+  // after it has been casted to a single-precision float. That is, in this
+  // mode static_cast<float>(v) must not be NaN, +Infinity or -Infinity.
+  //
+  // The result should be interpreted as buffer * 10^(point-length).
+  //
+  // The output depends on the given mode:
+  //  - SHORTEST: produce the least amount of digits for which the internal
+  //   identity requirement is still satisfied. If the digits are printed
+  //   (together with the correct exponent) then reading this number will give
+  //   'v' again. The buffer will choose the representation that is closest to
+  //   'v'. If there are two at the same distance, than the one farther away
+  //   from 0 is chosen (halfway cases - ending with 5 - are rounded up).
+  //   In this mode the 'requested_digits' parameter is ignored.
+  //  - SHORTEST_SINGLE: same as SHORTEST but with single-precision.
+  //  - FIXED: produces digits necessary to print a given number with
+  //   'requested_digits' digits after the decimal point. The produced digits
+  //   might be too short in which case the caller has to fill the remainder
+  //   with '0's.
+  //   Example: toFixed(0.001, 5) is allowed to return buffer="1", point=-2.
+  //   Halfway cases are rounded towards +/-Infinity (away from 0). The call
+  //   toFixed(0.15, 2) thus returns buffer="2", point=0.
+  //   The returned buffer may contain digits that would be truncated from the
+  //   shortest representation of the input.
+  //  - PRECISION: produces 'requested_digits' where the first digit is not '0'.
+  //   Even though the length of produced digits usually equals
+  //   'requested_digits', the function is allowed to return fewer digits, in
+  //   which case the caller has to fill the missing digits with '0's.
+  //   Halfway cases are again rounded away from 0.
+  // DoubleToAscii expects the given buffer to be big enough to hold all
+  // digits and a terminating null-character. In SHORTEST-mode it expects a
+  // buffer of at least kBase10MaximalLength + 1. In all other modes the
+  // requested_digits parameter and the padding-zeroes limit the size of the
+  // output. Don't forget the decimal point, the exponent character and the
+  // terminating null-character when computing the maximal output size.
+  // The given length is only used in debug mode to ensure the buffer is big
+  // enough.
+  static void DoubleToAscii(double v,
+                            DtoaMode mode,
+                            int requested_digits,
+                            char* buffer,
+                            int buffer_length,
+                            bool* sign,
+                            int* length,
+                            int* point);
+
+ private:
+  // Implementation for ToShortest and ToShortestSingle.
+  bool ToShortestIeeeNumber(double value,
+                            StringBuilder* result_builder,
+                            DtoaMode mode) const;
+
+  // If the value is a special value (NaN or Infinity) constructs the
+  // corresponding string using the configured infinity/nan-symbol.
+  // If either of them is NULL or the value is not special then the
+  // function returns false.
+  bool HandleSpecialValues(double value, StringBuilder* result_builder) const;
+  // Constructs an exponential representation (i.e. 1.234e56).
+  // The given exponent assumes a decimal point after the first decimal digit.
+  void CreateExponentialRepresentation(const char* decimal_digits,
+                                       int length,
+                                       int exponent,
+                                       StringBuilder* result_builder) const;
+  // Creates a decimal representation (i.e 1234.5678).
+  void CreateDecimalRepresentation(const char* decimal_digits,
+                                   int length,
+                                   int decimal_point,
+                                   int digits_after_point,
+                                   StringBuilder* result_builder) const;
+
+  const int flags_;
+  const char* const infinity_symbol_;
+  const char* const nan_symbol_;
+  const char exponent_character_;
+  const int decimal_in_shortest_low_;
+  const int decimal_in_shortest_high_;
+  const int max_leading_padding_zeroes_in_precision_mode_;
+  const int max_trailing_padding_zeroes_in_precision_mode_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(DoubleToStringConverter);
+};
+
+
+class StringToDoubleConverter {
+ public:
+  // Enumeration for allowing octals and ignoring junk when converting
+  // strings to numbers.
+  enum Flags {
+    NO_FLAGS = 0,
+    ALLOW_HEX = 1,
+    ALLOW_OCTALS = 2,
+    ALLOW_TRAILING_JUNK = 4,
+    ALLOW_LEADING_SPACES = 8,
+    ALLOW_TRAILING_SPACES = 16,
+    ALLOW_SPACES_AFTER_SIGN = 32
+  };
+
+  // Flags should be a bit-or combination of the possible Flags-enum.
+  //  - NO_FLAGS: no special flags.
+  //  - ALLOW_HEX: recognizes the prefix "0x". Hex numbers may only be integers.
+  //      Ex: StringToDouble("0x1234") -> 4660.0
+  //          In StringToDouble("0x1234.56") the characters ".56" are trailing
+  //          junk. The result of the call is hence dependent on
+  //          the ALLOW_TRAILING_JUNK flag and/or the junk value.
+  //      With this flag "0x" is a junk-string. Even with ALLOW_TRAILING_JUNK,
+  //      the string will not be parsed as "0" followed by junk.
+  //
+  //  - ALLOW_OCTALS: recognizes the prefix "0" for octals:
+  //      If a sequence of octal digits starts with '0', then the number is
+  //      read as octal integer. Octal numbers may only be integers.
+  //      Ex: StringToDouble("01234") -> 668.0
+  //          StringToDouble("012349") -> 12349.0  // Not a sequence of octal
+  //                                               // digits.
+  //          In StringToDouble("01234.56") the characters ".56" are trailing
+  //          junk. The result of the call is hence dependent on
+  //          the ALLOW_TRAILING_JUNK flag and/or the junk value.
+  //          In StringToDouble("01234e56") the characters "e56" are trailing
+  //          junk, too.
+  //  - ALLOW_TRAILING_JUNK: ignore trailing characters that are not part of
+  //      a double literal.
+  //  - ALLOW_LEADING_SPACES: skip over leading spaces.
+  //  - ALLOW_TRAILING_SPACES: ignore trailing spaces.
+  //  - ALLOW_SPACES_AFTER_SIGN: ignore spaces after the sign.
+  //       Ex: StringToDouble("-   123.2") -> -123.2.
+  //           StringToDouble("+   123.2") -> 123.2
+  //
+  // empty_string_value is returned when an empty string is given as input.
+  // If ALLOW_LEADING_SPACES or ALLOW_TRAILING_SPACES are set, then a string
+  // containing only spaces is converted to the 'empty_string_value', too.
+  //
+  // junk_string_value is returned when
+  //  a) ALLOW_TRAILING_JUNK is not set, and a junk character (a character not
+  //     part of a double-literal) is found.
+  //  b) ALLOW_TRAILING_JUNK is set, but the string does not start with a
+  //     double literal.
+  //
+  // infinity_symbol and nan_symbol are strings that are used to detect
+  // inputs that represent infinity and NaN. They can be null, in which case
+  // they are ignored.
+  // The conversion routine first reads any possible signs. Then it compares the
+  // following character of the input-string with the first character of
+  // the infinity, and nan-symbol. If either matches, the function assumes, that
+  // a match has been found, and expects the following input characters to match
+  // the remaining characters of the special-value symbol.
+  // This means that the following restrictions apply to special-value symbols:
+  //  - they must not start with signs ('+', or '-'),
+  //  - they must not have the same first character.
+  //  - they must not start with digits.
+  //
+  // Examples:
+  //  flags = ALLOW_HEX | ALLOW_TRAILING_JUNK,
+  //  empty_string_value = 0.0,
+  //  junk_string_value = NaN,
+  //  infinity_symbol = "infinity",
+  //  nan_symbol = "nan":
+  //    StringToDouble("0x1234") -> 4660.0.
+  //    StringToDouble("0x1234K") -> 4660.0.
+  //    StringToDouble("") -> 0.0  // empty_string_value.
+  //    StringToDouble(" ") -> NaN  // junk_string_value.
+  //    StringToDouble(" 1") -> NaN  // junk_string_value.
+  //    StringToDouble("0x") -> NaN  // junk_string_value.
+  //    StringToDouble("-123.45") -> -123.45.
+  //    StringToDouble("--123.45") -> NaN  // junk_string_value.
+  //    StringToDouble("123e45") -> 123e45.
+  //    StringToDouble("123E45") -> 123e45.
+  //    StringToDouble("123e+45") -> 123e45.
+  //    StringToDouble("123E-45") -> 123e-45.
+  //    StringToDouble("123e") -> 123.0  // trailing junk ignored.
+  //    StringToDouble("123e-") -> 123.0  // trailing junk ignored.
+  //    StringToDouble("+NaN") -> NaN  // NaN string literal.
+  //    StringToDouble("-infinity") -> -inf.  // infinity literal.
+  //    StringToDouble("Infinity") -> NaN  // junk_string_value.
+  //
+  //  flags = ALLOW_OCTAL | ALLOW_LEADING_SPACES,
+  //  empty_string_value = 0.0,
+  //  junk_string_value = NaN,
+  //  infinity_symbol = NULL,
+  //  nan_symbol = NULL:
+  //    StringToDouble("0x1234") -> NaN  // junk_string_value.
+  //    StringToDouble("01234") -> 668.0.
+  //    StringToDouble("") -> 0.0  // empty_string_value.
+  //    StringToDouble(" ") -> 0.0  // empty_string_value.
+  //    StringToDouble(" 1") -> 1.0
+  //    StringToDouble("0x") -> NaN  // junk_string_value.
+  //    StringToDouble("0123e45") -> NaN  // junk_string_value.
+  //    StringToDouble("01239E45") -> 1239e45.
+  //    StringToDouble("-infinity") -> NaN  // junk_string_value.
+  //    StringToDouble("NaN") -> NaN  // junk_string_value.
+  StringToDoubleConverter(int flags,
+                          double empty_string_value,
+                          double junk_string_value,
+                          const char* infinity_symbol,
+                          const char* nan_symbol)
+      : flags_(flags),
+        empty_string_value_(empty_string_value),
+        junk_string_value_(junk_string_value),
+        infinity_symbol_(infinity_symbol),
+        nan_symbol_(nan_symbol) {
+  }
+
+  // Performs the conversion.
+  // The output parameter 'processed_characters_count' is set to the number
+  // of characters that have been processed to read the number.
+  // Spaces than are processed with ALLOW_{LEADING|TRAILING}_SPACES are included
+  // in the 'processed_characters_count'. Trailing junk is never included.
+  double StringToDouble(const char* buffer,
+                        int length,
+                        int* processed_characters_count) const {
+    return StringToIeee(buffer, length, processed_characters_count, true);
+  }
+
+  // Same as StringToDouble but reads a float.
+  // Note that this is not equivalent to static_cast<float>(StringToDouble(...))
+  // due to potential double-rounding.
+  float StringToFloat(const char* buffer,
+                      int length,
+                      int* processed_characters_count) const {
+    return static_cast<float>(StringToIeee(buffer, length,
+                                           processed_characters_count, false));
+  }
+
+ private:
+  const int flags_;
+  const double empty_string_value_;
+  const double junk_string_value_;
+  const char* const infinity_symbol_;
+  const char* const nan_symbol_;
+
+  double StringToIeee(const char* buffer,
+                      int length,
+                      int* processed_characters_count,
+                      bool read_as_double) const;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(StringToDoubleConverter);
+};
+
+}  // namespace double_conversion
+
+#endif  // DOUBLE_CONVERSION_DOUBLE_CONVERSION_H_

src/external/ujson/ujson/double-conversion/AUTHORS

@@ -0,0 +1,13 @@
+# Below is a list of people and organizations that have contributed
+# to the double-conversion project.  Names should be added to the
+# list like so:
+#
+#   Name/Organization <email address>
+
+Google Inc.
+Mozilla Foundation
+
+Jeff Muizelaar <jmuizelaar@mozilla.com>
+Mike Hommey <mhommey@mozilla.com>
+Martin Olsson <mnemo@minimum.se>
+Kent Williams <chaircrusher@gmail.com>

src/external/ujson/ujson/double-conversion/COPYING

@@ -0,0 +1,26 @@
+Copyright 2006-2011, the V8 project authors. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of Google Inc. nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

src/external/ujson/ujson/double-conversion/LICENSE

@@ -0,0 +1,26 @@
+Copyright 2006-2011, the V8 project authors. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of Google Inc. nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

src/external/ujson/ujson/double-conversion/README

@@ -0,0 +1,11 @@
+http://code.google.com/p/double-conversion
+
+This project (double-conversion) provides binary-decimal and decimal-binary
+routines for IEEE doubles.
+
+The library consists of efficient conversion routines that have been extracted
+from the V8 JavaScript engine. The code has been refactored and improved so that
+it can be used more easily in other projects.
+
+There is extensive documentation in src/double-conversion.h. Other examples can
+be found in test/cctest/test-conversions.cc.

src/public/minbase/min_crypto_impl.h

@@ -0,0 +1,881 @@
+//====== Copyright Valve Corporation, All rights reserved. ====================
+//
+// Minimal-dependency crypto helper routine implementations.
+//
+//=============================================================================
+
+#ifndef _MIN_CRYPTO_IMPL_H
+#define _MIN_CRYPTO_IMPL_H
+
+// This file is included in multiple places so without
+// some kind of inlining you'll get multiple definitions.
+// If you're careful you can override that, but we'll
+// default to a basic inline.
+#ifndef MIN_CRYPTO_INLINE
+#define MIN_CRYPTO_INLINE inline
+#endif
+
+#if defined(_MSC_VER)
+extern "C" unsigned __int64 __emulu( unsigned int, unsigned int );
+extern "C" unsigned char _BitScanReverse( unsigned long* Index, unsigned long Mask );
+#pragma intrinsic(__emulu)
+#pragma intrinsic(_BitScanReverse)
+#endif
+
+
+enum EMinCryptoError
+{
+	k_EMinCryptoErrorNone = 0,
+	k_EMinCryptoErrorInvalidKey = 1,
+	k_EMinCryptoErrorInternalBufferTooSmall = 2,
+	k_EMinCryptoErrorOutputBufferTooSmall = 3,
+};
+
+MIN_CRYPTO_INLINE unsigned char HexDecodeHalfByte( char c )
+{
+	// Only works for valid inputs (0-9, a-z, A-Z).
+	uint8 x = (uint8)(c - '0') & (uint8)0x1F;
+	return ( x > (uint8)9 ) ? x - (uint8)7 : x;
+} 
+
+MIN_CRYPTO_INLINE bool HexDecode( const char *pchData, uint8 *pubDecodedData, uint32 *pcubDecodedData )
+{
+	// Only works for valid inputs (0-9, a-z, A-Z).
+	uint32 i = 0;
+	size_t cchData = strlen( pchData );
+	if ( cchData > 0xffffffff ||
+			( cchData % 2 ) != 0 )
+	{
+		return false;
+	}
+	for ( i = 0; i < (uint32)cchData ; i += 2 ) 
+	{
+		uint8 b1 = HexDecodeHalfByte( pchData[i] );
+		uint8 b2 = HexDecodeHalfByte( pchData[i+1] );
+		if ( i / 2 >= *pcubDecodedData )
+			return false;
+
+		*pubDecodedData++ = ( b1 << 4 ) + b2;  // <<4 multiplies by 16
+	}
+	*pcubDecodedData = i / 2;
+	return true;
+}
+
+// Simple SHA1 C public-domain implementation by Wei Dei and other contributors.
+// Edited by Valve for #define removal, endian detection, general simplification.
+// Downloaded from https://oauth.googlecode.com/svn/code/c/liboauth/src/sha1.c 5/7/2016
+// Original attribution:
+//	/* This code is public-domain - it is based on libcrypt
+//	 * placed in the public domain by Wei Dai and other contributors.
+//	 */
+typedef struct sha1nfo {
+	uint32 buffer[64/4];
+	uint32 state[20/4];
+	uint32 byteCount;
+	uint8 bufferOffset;
+	uint8 littleEndianFlip;
+} sha1nfo;
+
+MIN_CRYPTO_INLINE void sha1_init(sha1nfo *s) {
+	union { uint32 a; uint8 b[4]; } endian_detect = { 3 };
+	s->state[0] = 0x67452301u;
+	s->state[1] = 0xefcdab89u;
+	s->state[2] = 0x98badcfeu;
+	s->state[3] = 0x10325476u;
+	s->state[4] = 0xc3d2e1f0u;
+	s->byteCount = 0;
+	s->bufferOffset = 0;
+	s->littleEndianFlip = endian_detect.b[0]; // 3 if little-endian, 0 if big-endian
+}
+
+MIN_CRYPTO_INLINE uint32 sha1_rol32(uint32 number, uint8 bits) {
+	return ((number << bits) | (number >> (32-bits)));
+}
+
+MIN_CRYPTO_INLINE void sha1_hashBlock(sha1nfo *s) {
+	uint8 i;
+	uint32 a,b,c,d,e,t;
+
+	a=s->state[0];
+	b=s->state[1];
+	c=s->state[2];
+	d=s->state[3];
+	e=s->state[4];
+	for (i=0; i<80; i++) {
+		if (i>=16) {
+			t = s->buffer[(i+13)&15] ^ s->buffer[(i+8)&15] ^ s->buffer[(i+2)&15] ^ s->buffer[i&15];
+			s->buffer[i&15] = sha1_rol32(t,1);
+		}
+		if (i<20) {
+			t = (d ^ (b & (c ^ d))) + 0x5a827999u;
+		} else if (i<40) {
+			t = (b ^ c ^ d) + 0x6ed9eba1u;
+		} else if (i<60) {
+			t = ((b & c) | (d & (b | c))) + 0x8f1bbcdcu;
+		} else {
+			t = (b ^ c ^ d) + 0xca62c1d6u;
+		}
+		t+=sha1_rol32(a,5) + e + s->buffer[i&15];
+		e=d;
+		d=c;
+		c=sha1_rol32(b,30);
+		b=a;
+		a=t;
+	}
+	s->state[0] += a;
+	s->state[1] += b;
+	s->state[2] += c;
+	s->state[3] += d;
+	s->state[4] += e;
+}
+
+MIN_CRYPTO_INLINE void sha1_addUncounted(sha1nfo *s, uint8 data) {
+	uint8 * const b = (uint8*) s->buffer;
+	b[s->bufferOffset ^ s->littleEndianFlip] = data;
+	s->bufferOffset++;
+	if (s->bufferOffset == sizeof(s->buffer)) {
+		sha1_hashBlock(s);
+		s->bufferOffset = 0;
+	}
+}
+
+MIN_CRYPTO_INLINE void sha1_writebyte(sha1nfo *s, uint8 data) {
+	++s->byteCount;
+	sha1_addUncounted(s, data);
+}
+
+MIN_CRYPTO_INLINE void sha1_write(sha1nfo *s, const char *data, size_t len) {
+	for (;len--;) sha1_writebyte(s, (uint8) *data++);
+}
+
+MIN_CRYPTO_INLINE void sha1_pad(sha1nfo *s) {
+	// Implement SHA-1 padding (fips180-2 5.1.1)
+	// Pad with 0x80 followed by 0x00 until the end of the block
+	sha1_addUncounted(s, 0x80);
+	while (s->bufferOffset != 56) sha1_addUncounted(s, 0x00);
+	// Append length in the last 8 bytes
+	sha1_addUncounted(s, 0); // We're only using 32 bit lengths
+	sha1_addUncounted(s, 0); // But SHA-1 supports 64 bit lengths
+	sha1_addUncounted(s, 0); // So zero pad the top bits
+	sha1_addUncounted(s, (uint8)(s->byteCount >> 29)); // Shifting to multiply by 8
+	sha1_addUncounted(s, (uint8)(s->byteCount >> 21)); // as SHA-1 supports bitstreams as well as
+	sha1_addUncounted(s, (uint8)(s->byteCount >> 13)); // byte.
+	sha1_addUncounted(s, (uint8)(s->byteCount >> 5));
+	sha1_addUncounted(s, (uint8)(s->byteCount << 3));
+}
+// End of public-domain SHA implementation
+
+MIN_CRYPTO_INLINE void ComputeSHA1Digest( const void *pData, uint32 cubData, uint8 *pDigestOut )
+{
+	sha1nfo s;
+	sha1_init( &s );
+	sha1_write( &s, (const char*)pData, cubData );
+	sha1_pad( &s );
+	for ( size_t i = 0; i < 20; ++i )
+		pDigestOut[i] = ((uint8*)s.state)[i ^ s.littleEndianFlip];
+}
+
+
+// Simple unsigned big-integer implementation - only the bare necessities
+// to support modular exponentiation for RSA signature verification.
+class CSimpleRSABigNum
+{
+protected:
+	// Words are in least-significant to most-significant order. Leading zeros
+	// are never counted in nwords/nbits except after _Untrimmed functions.
+	uint32 *words;
+	uint32 ncapacity;
+	uint32 nwords;
+	uint32 nbits;
+
+public:
+	CSimpleRSABigNum() { words = NULL; nbits = nwords = ncapacity = 0; }
+	CSimpleRSABigNum( const CSimpleRSABigNum& x ) { words = NULL; nbits = nwords = ncapacity = 0; *this = x; }
+	explicit CSimpleRSABigNum( uint32 x ) { words = NULL; nbits = nwords = ncapacity = 0; SetFromUint32( x ); }
+	~CSimpleRSABigNum() { delete[] words; }
+
+	CSimpleRSABigNum& operator=(const CSimpleRSABigNum& x)
+	{
+		EnsureCapacity( x.nwords );
+		nwords = x.nwords;
+		nbits = x.nbits;
+		for ( uint32 i = 0; i < nwords; ++i )
+			words[i] = x.words[i];
+		return *this;
+	}
+
+	uint32 CountBytes() const { return (nbits + 7u) / 8u; }
+	uint32 CountBits() const { return nbits; }
+
+	void Clear() { nwords = nbits = 0; }
+
+	void SetFromUint32( uint32 value )
+	{
+		EnsureCapacity( 1 );
+		words[0] = value;
+		nwords = 1;
+		nbits = 32;
+		TrimLeadingZeros();
+	}
+
+	void SetFromBigEndianBytes( const uint8 *pubData, uint32 cubData )
+	{
+		// We store words in least-significant to most-significant order.
+		// On little-endian systems, individual word bytes are also LSB to MSB;
+		// on big-endian systems, we have to reverse direction of bytes in a word.
+		union { uint32 a; uint8 b[4]; } endian_detect = { 3 };
+		size_t big_endian_flip = endian_detect.b[3]; // 3 if big-endian, 0 if not
+		Clear();
+		ZeroExtend_Untrimmed( ( cubData + 3u ) / 4u );
+		for ( size_t idest = 0, isrc = cubData; isrc--; ++idest )
+			((uint8*)words)[idest ^ big_endian_flip] = pubData[isrc];
+		TrimLeadingZeros();
+	}
+
+	bool CopyToBigEndianBytes( uint8 *pubData, uint32 *pcubData ) const
+	{
+		if ( *pcubData < CountBytes() )
+		{
+			*pcubData = CountBytes();
+			return false;
+		}
+		union { uint32 a; uint8 b[4]; } endian_detect = { 3 };
+		size_t big_endian_flip = endian_detect.b[3]; // 3 if big-endian, 0 if not
+		for ( size_t isrc = 0, idest = CountBytes(); idest--; ++isrc )
+			pubData[idest] = ((uint8*)words)[isrc ^ big_endian_flip];
+		*pcubData = CountBytes();
+		return true;
+	}
+
+	void Multiply( const CSimpleRSABigNum& rhs )
+	{
+		// Traditional long-hand multiplication accumulated one row at a time,
+		// where a row is a single word of *this multiplied by the entirity of rhs.
+		// Note that rhs may alias to self! Write output to result, swap at end.
+		CSimpleRSABigNum result, temp;
+		result.ZeroExtend_Untrimmed( rhs.nwords + nwords + 2 );
+		temp.ZeroExtend_Untrimmed( rhs.nwords + 1 );
+		for ( uint32 i = 0; i < nwords; ++i )
+		{
+			uint32 words_i = words[i], carry = 0;
+			for ( uint32 j = 0; j < rhs.nwords; ++j )
+			{
+				uint64 mul = Mulitply32x32( words_i, rhs.words[j] ) + carry;
+				temp.words[j] = (uint32)mul;
+				carry = (uint32)(mul >> 32);
+			}
+			temp.words[rhs.nwords] = carry;
+			result.AddWithWordOffset_Untrimmed( temp, i );
+		}
+		result.TrimLeadingZeros();
+		Swap( result );
+	}
+
+	void ShiftDown( uint32 shift, uint32 skip_low_words = 0 )
+	{
+		if ( nbits == 0 || shift == 0 )
+			return;
+
+		if ( shift >= nbits )
+		{
+			Clear();
+			return;
+		}
+
+		uint32 wordoffset = shift / 32u;
+		uint32 bitoffset = shift & 31u;
+		if ( wordoffset != 0 )
+		{
+			for ( uint32 i = wordoffset + skip_low_words; i < nwords; ++i )
+				words[i - wordoffset] = words[i];
+			nbits -= wordoffset * 32u;
+			nwords -= wordoffset;
+		}
+		if ( bitoffset != 0 )
+		{
+			uint32 *p = &words[skip_low_words];
+			uint32 n = nwords - skip_low_words - 1;
+			// optimization: better codegen and lower latency on fixed-width shifts for case shift==1.
+			// makes RSA almost 20% faster. in testing, specializing values other than 1 had no impact.
+			if ( bitoffset == 1u )
+			{
+				for ( ; n; --n, ++p )
+					p[0] = (p[0] >> 1u) | (p[1] << 31u);
+			}
+			else
+			{
+				for ( ; n; --n, ++p )
+					p[0] = (p[0] >> bitoffset) | (p[1] << (32u - bitoffset));
+			}
+			p[0] >>= bitoffset;
+			nbits -= bitoffset;
+			nwords = (nbits + 31u) / 32u;
+		}
+	}
+
+	void ShiftUp( uint32 shift )
+	{
+		// Could write code similar to ShiftDown, but simpler to just reuse Multiply and AddWithWordOffset.
+		// Not performance sensitive - fewer than 20 invocations per RSA operation regardless of key size.
+		CSimpleRSABigNum mul;
+		mul.AddWithWordOffset_Untrimmed( CSimpleRSABigNum( 1u << (shift & 31u) ), (shift / 32u) );
+		Multiply( mul );
+	}
+
+	void SlowDivide( const CSimpleRSABigNum& divisor, CSimpleRSABigNum& remainder )
+	{
+		if ( divisor.nbits == 0 )
+			return;
+		// Simple long-division: subtract rhs if possible at every possible bit offset
+		// from most significant to least significant.
+		CSimpleRSABigNum shifted_divisor( divisor );
+		uint32 bitindex = ( nbits > divisor.nbits ) ? nbits - divisor.nbits : 0u;
+		shifted_divisor.ShiftUp( bitindex );
+		Swap( remainder );
+		Clear();
+		ZeroExtend_Untrimmed( (bitindex / 32u) + 1 );
+		for (;;)
+		{
+			if ( remainder.SubtractIfNotUnderflow( shifted_divisor, bitindex / 32u ) )
+				words[bitindex / 32u] |= ( 1u << ( bitindex & 31u ) );
+			if ( bitindex-- == 0 )
+				break;
+			shifted_divisor.ShiftDown( 1, bitindex / 32u );
+		}
+		TrimLeadingZeros();
+	}
+
+	void ExponentiateModulo( const CSimpleRSABigNum &exponent, const CSimpleRSABigNum &modulus )
+	{
+		if ( nbits == 0 || modulus.nbits == 0 )
+			return;
+
+		if ( &exponent == this || &modulus == this )
+		{
+			ExponentiateModulo( CSimpleRSABigNum( exponent ), CSimpleRSABigNum( modulus ) );
+			return;
+		}
+
+		// Instead of slow modulo operations, we'll do faster Barrett reductions, which are
+		// basically the fixed-point equivalent of multiplying by the precalculated inverse,
+		// dropping the fractional part, remultiplying and subtracting to get a remainder.
+		CSimpleRSABigNum precalc( 1u ), temp;
+		precalc.ShiftUp( 2u * modulus.nwords * 32u );
+		precalc.SlowDivide( modulus, temp );
+
+		// If base is more than twice as wide as modulo, can't use Barrett reduction.
+		// (Note that in RSA usage, the base value is never wider than the modulus.)
+		CSimpleRSABigNum base( *this );
+		if ( nbits <= modulus.nbits * 2 )
+			base.BarrettReduce( modulus, precalc );
+		else
+			SlowDivide( modulus, base );
+
+		// Classic algorithm: exponentiation by squaring. Applying modulo after every step
+		// keeps the bit size manageable and allows the operation to perform reasonably fast.
+		EnsureCapacity( modulus.nwords * 2 + 3 );
+		SetFromUint32( 1 );
+		// For each bit in the exponent from most to least significant...
+		for ( uint32 bitindex = exponent.nbits; bitindex--; )
+		{
+			// Square working value, then multiply by base if bit is set
+			Multiply( *this );
+			BarrettReduce( modulus, precalc );
+			if ( exponent.words[bitindex / 32u] & (1u << (bitindex & 31u)) )
+			{
+				Multiply( base );
+				BarrettReduce( modulus, precalc );
+			}
+		}
+	}
+
+	void Swap( CSimpleRSABigNum& x )
+	{
+		uint32 *p = words, c = ncapacity, n = nwords, b = nbits;
+		words = x.words; ncapacity = x.ncapacity; nwords = x.nwords; nbits = x.nbits;
+		x.words = p; x.ncapacity = c; x.nwords = n; x.nbits = b;
+	}
+
+protected:
+	void EnsureCapacity( uint32 wordcount )
+	{
+		if ( ncapacity >= wordcount )
+			return;
+		uint32 *oldwords = words;
+		words = new uint32[ wordcount ];
+		ncapacity = wordcount;
+		for ( uint32 i = nwords; i--; )
+			words[i] = oldwords[i];
+		delete[] oldwords;
+	}
+
+	static uint64 Mulitply32x32( uint32 a, uint32 b )
+	{
+#if defined(_MSC_VER)
+		return (uint64) __emulu( a, b );
+#else
+		return (uint64)a * b;
+#endif
+	}
+
+	static uint32 FindMSBInNonZeroWord( uint32 n )
+	{
+#if defined(_MSC_VER)
+		unsigned long b;
+		(void)_BitScanReverse( &b, n );
+		return (uint32)b;
+#elif defined(__GNUC__)
+		return 31u - (uint32)__builtin_clz( n );
+#else
+		uint32 b = 0;
+		for ( ; n; ++b, n >>= 1 ) {}
+		return b - 1;
+#endif
+	}
+
+	void TrimLeadingZeros()
+	{
+		while ( nwords != 0 && words[nwords - 1] == 0 )
+			--nwords;
+		if ( nwords != 0 )
+			nbits = nwords * 32u + FindMSBInNonZeroWord( words[nwords - 1] ) - 31;
+		else
+			nbits = 0;
+	}
+
+	void ZeroExtend_Untrimmed( uint32 wordcount )
+	{
+		EnsureCapacity( wordcount );
+		while ( nwords < wordcount )
+			words[nwords++] = 0;
+		nbits = nwords * 32u;
+	}
+
+	void Truncate( uint32 wordcount )
+	{
+		if ( nwords <= wordcount )
+			return;
+		nwords = wordcount;
+		nbits = nwords * 32u;
+		TrimLeadingZeros();
+	}
+
+	void AddWithWordOffset_Untrimmed( const CSimpleRSABigNum &rhs, uint32 offset )
+	{
+		ZeroExtend_Untrimmed( ( ( rhs.nwords + offset > nwords ) ? rhs.nwords + offset : nwords ) + 1 );
+		uint32 carry = 0;
+		uint32 *p = &words[offset];
+		const uint32 *q = &rhs.words[0];
+		for ( uint32 n = rhs.nwords; n; --n, ++p, ++q )
+		{
+			uint64 result = (uint64)*p + *q + carry;
+			*p = (uint32)result;
+			carry = (uint32)(result >> 32u);
+		}
+		// Push carry upwards until we aren't carrying any more.
+		for ( ; carry; ++p )
+		{
+			uint64 result = (uint64)*p + carry;
+			*p = (uint32)result;
+			carry = (uint32)(result >> 32u);
+		}
+		// Trim a single word to prevent excessive growth of nwords in a loop
+		if ( words[nwords - 1] == 0 )
+		{
+			nwords -= 1;
+			nbits -= 32;
+		}
+	}
+
+	bool SubtractIfNotUnderflow( const CSimpleRSABigNum &rhs, uint32 skipwords = 0 )
+	{
+		if ( skipwords >= rhs.nwords )
+			return false;
+
+		// Abort if *this is smaller than rhs
+		if ( nbits < rhs.nbits )
+			return false;
+
+		if ( nbits == rhs.nbits )
+		{
+			// Same bit length; compare words from most significant to least.
+			// If the current word is smaller, then subtraction will underflow.
+			// If the current word is identical, keep advancing to the next word.
+			for ( uint32 i = rhs.nwords; i-- > skipwords; )
+			{
+				if ( words[i] < rhs.words[i] )
+					return false;
+				if ( words[i] > rhs.words[i] )
+					break;
+			}
+		}
+
+		// We now know that subtraction will not underflow, go ahead and do it.
+		uint32 borrow = 0;
+		uint32 *p = &words[skipwords];
+		const uint32 *q = &rhs.words[skipwords];
+		for ( uint32 n = rhs.nwords - skipwords; n; --n, ++p, ++q )
+		{
+			uint64 result = (uint64)*p - *q - borrow;
+			*p = (uint32)result;
+			borrow = (uint32)(result >> 32u) & 1u;
+		}
+		// Push carry (borrow) upwards until we aren't carrying any more.
+		for ( ; borrow; ++p )
+		{
+			uint64 result = (uint64)*p - borrow;
+			*p = (uint32)result;
+			borrow = (uint32)(result >> 32u) & 1u;
+		}
+		TrimLeadingZeros();
+		return true;
+	}
+
+	void BarrettReduce( const CSimpleRSABigNum& modulus, const CSimpleRSABigNum& precalc )
+	{
+		// See Handbook of Applied Cryptography for reference, http://cacr.uwaterloo.ca/hac/
+		if ( nbits > modulus.nbits )
+		{
+			CSimpleRSABigNum q( *this );
+			q.ShiftDown( (modulus.nwords - 1) * 32u );
+			q.Multiply( precalc );
+			q.ShiftDown( (modulus.nwords + 1) * 32u );
+			q.Multiply( modulus );
+			// q = q mod (b**(k+1)); *this = *this mod (b**(k+1))
+			q.Truncate( modulus.nwords + 1 );
+			Truncate( modulus.nwords + 1 );
+			// *this -= b; if ( *this < 0 ) *this += (2**32)**(k+1)
+			if ( !SubtractIfNotUnderflow( q ) )
+			{
+				ZeroExtend_Untrimmed( modulus.nwords + 2 );
+				words[modulus.nwords + 1] = 1u;
+				TrimLeadingZeros();
+				SubtractIfNotUnderflow( q );
+			}
+		}
+		// while (*this > modulus) *this -= modulus;
+		while ( SubtractIfNotUnderflow( modulus ) ) {}
+	}
+};
+
+// Decode ASN.1 tag - works only for simple tag/length/value cases such as SEQUENCE (0x30), INTEGER(0x02), OCTET_STRING (0x04), etc
+MIN_CRYPTO_INLINE bool ExtractASN1FieldData( uint8 expect_tag, const uint8 *buf, size_t buflen, const uint8 **datastart_out, size_t *datalen_out )
+{
+	*datastart_out = NULL;
+	*datalen_out = 0;
+
+	// ASN.1 tag/length/value triple: (tag byte) (encoded len) (raw data)
+	if ( buflen < 2 )
+		return false;
+
+	if ( buf[0] != expect_tag )
+		return false;
+
+	size_t encoded_len = 0;
+	size_t encoded_len_bytes = 0;
+	if ( (buf[1] & 0x80) == 0 )
+	{
+		// if length < 128, encoded len is just the length
+		encoded_len = buf[1] & 0x7F;
+	}
+	else
+	{
+		// else encoded len is 0x80 + number of following big-endian unsigned integer bytes
+		encoded_len_bytes = buf[1] & 0x7F;
+		if ( encoded_len_bytes < 1 || encoded_len_bytes > sizeof( size_t ) )
+			return false;
+		if ( 2 + encoded_len_bytes > buflen )
+			return false;
+		for ( size_t i = 0; i < encoded_len_bytes; ++i )
+		{
+			encoded_len <<= 8;
+			encoded_len += (uint8)buf[2 + i];
+		}
+		if ( 2 + encoded_len_bytes + encoded_len < encoded_len )
+			return false;
+	}
+	if ( 2 + encoded_len_bytes + encoded_len > buflen )
+		return false;
+	*datastart_out = buf + 2 + encoded_len_bytes;
+	*datalen_out = encoded_len;
+	return true;
+}
+
+MIN_CRYPTO_INLINE bool ExtractModulusAndExponentFromX509PubKey( const uint8 *pDataPtr, size_t cDataLen, const uint8 **ppModulus, size_t *pcubModulus, const uint8 **ppExponent, size_t *pcubExponent )
+{
+	// X.509-format RSA public keys are wrapped in an outer SEQUENCE, with an initial inner SEQUENCE containing ( OID for rsaEncryption, NULL )
+	if ( !ExtractASN1FieldData( 0x30 /*SEQUENCE*/, pDataPtr, cDataLen, &pDataPtr, &cDataLen ) )
+		return false;
+	static const char k_rgchRSAPubKeyAlgoSequence[] = "\x30\x0D\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01\x05"; // final \x00 implied by string handling
+	if ( cDataLen <= sizeof( k_rgchRSAPubKeyAlgoSequence ) || memcmp( pDataPtr, k_rgchRSAPubKeyAlgoSequence, sizeof( k_rgchRSAPubKeyAlgoSequence ) ) != 0 )
+		return false;
+	pDataPtr += sizeof( k_rgchRSAPubKeyAlgoSequence );
+	cDataLen -= sizeof( k_rgchRSAPubKeyAlgoSequence );
+	// ... followed by a BIT STRING (*not* OCTET STRING as with PKCS#8) that contains the actual key data
+	if ( !ExtractASN1FieldData( 0x03 /*BIT STRING*/, pDataPtr, cDataLen, &pDataPtr, &cDataLen ) || cDataLen < 1 )
+		return false;
+	// Discard the number of zero-padding bits which were added on top of the BIT STRING; don't care.
+	++pDataPtr;
+	--cDataLen;
+	// Now examining BIT STRING contents, which are in turn another ASN.1 SEQUENCE of two INTEGERs
+	// for the public-key modulus and exponent.
+	if ( !ExtractASN1FieldData( 0x30/*SEQUENCE*/, pDataPtr, cDataLen, &pDataPtr, &cDataLen ) )
+		return false;
+	if ( !ExtractASN1FieldData( 0x02 /*INTEGER*/, pDataPtr, cDataLen, ppModulus, pcubModulus ) )
+		return false;
+	size_t cAdvanceBeyondTag = *ppModulus + *pcubModulus - pDataPtr;
+	pDataPtr += cAdvanceBeyondTag;
+	cDataLen -= cAdvanceBeyondTag;
+	if ( !ExtractASN1FieldData( 0x02 /*INTEGER*/, pDataPtr, cDataLen, ppExponent, pcubExponent ) )
+		return false;
+	return true;
+}
+
+
+MIN_CRYPTO_INLINE bool ExtractModulusAndExponentFromX509PrivKey( const uint8 *pDataPtr, size_t cDataLen, const uint8 **ppModulus, size_t *pcubModulus, const uint8 **ppExponent, size_t *pcubExponent )
+{
+	// X.509-format RSA private keys are wrapped in an outer SEQUENCE, with an initial inner SEQUENCE containing ( OID for rsaEncryption, NULL )
+	if ( !ExtractASN1FieldData( 0x30 /*SEQUENCE*/, pDataPtr, cDataLen, &pDataPtr, &cDataLen ) )
+		return false;
+	static const char k_rgExpectSequenceBytes[] = "\x02\x01\x00\x30\x0D\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01\x05"; // final byte is \x00
+	if ( cDataLen <= sizeof( k_rgExpectSequenceBytes ) || memcmp( pDataPtr, k_rgExpectSequenceBytes, sizeof( k_rgExpectSequenceBytes ) ) != 0 )
+		return false;
+	pDataPtr += sizeof( k_rgExpectSequenceBytes );
+	cDataLen -= sizeof( k_rgExpectSequenceBytes );
+	// ... followed by a OCTET STRING
+	if ( !ExtractASN1FieldData( 0x04 /*OCTET STRING*/, pDataPtr, cDataLen, &pDataPtr, &cDataLen ) || cDataLen < 1 )
+		return false;
+	// Now examining contents, which are in turn another ASN.1 SEQUENCE of integers INTEGERs
+	if ( !ExtractASN1FieldData( 0x30/*SEQUENCE*/, pDataPtr, cDataLen, &pDataPtr, &cDataLen ) )
+		return false;
+
+	// first the version # which we will ignore
+	const uint8 *pVersion;
+	size_t cubVersion;
+	if ( !ExtractASN1FieldData( 0x02 /*INTEGER*/, pDataPtr, cDataLen, &pVersion, &cubVersion ) )
+		return false;
+	size_t cAdvanceBeyondTag = pVersion + cubVersion - pDataPtr;
+	pDataPtr += cAdvanceBeyondTag;
+	cDataLen -= cAdvanceBeyondTag;
+
+	// now the modulus
+	if ( !ExtractASN1FieldData( 0x02 /*INTEGER*/, pDataPtr, cDataLen, ppModulus, pcubModulus ) )
+		return false;
+	cAdvanceBeyondTag = *ppModulus + *pcubModulus - pDataPtr;
+	pDataPtr += cAdvanceBeyondTag;
+	cDataLen -= cAdvanceBeyondTag;
+
+	// public exponent - which we will ignore
+	const uint8 *pExponentPublic;
+	size_t cubExponentPublic;
+	if ( !ExtractASN1FieldData( 0x02 /*INTEGER*/, pDataPtr, cDataLen, &pExponentPublic, &cubExponentPublic ) )
+		return false;
+	cAdvanceBeyondTag = pExponentPublic + cubExponentPublic - pDataPtr;
+	pDataPtr += cAdvanceBeyondTag;
+	cDataLen -= cAdvanceBeyondTag;
+
+	// get private exponent
+	if ( !ExtractASN1FieldData( 0x02 /*INTEGER*/, pDataPtr, cDataLen, ppExponent, pcubExponent ) )
+		return false;
+	return true;
+}
+
+
+MIN_CRYPTO_INLINE bool ExtractSHA1DigestFromRSASignature( const uint8 *pDataPtr, size_t cDataLen, const uint8 **pDigestOut )
+{
+	// Verify strict format: 0x01, cPaddingLen * 0xFF, 0x00 0x30 ... 0x04 0x14, SHA1 bytes, <END OF DATA>.
+	static const uint8 k_rgubAlgoPrefix[] = { 0x00, 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 };
+	static const size_t k_nSHABytes = 20;
+	*pDigestOut = NULL;
+	if ( cDataLen < 1 + sizeof( k_rgubAlgoPrefix ) + k_nSHABytes || pDataPtr[0] != 0x01 )
+		return false;
+	for ( size_t i = 1; i < cDataLen - sizeof( k_rgubAlgoPrefix ) - k_nSHABytes; ++i )
+	{
+		if ( pDataPtr[ i ] != (uint8)0xFF )
+			return false;
+	}
+	for ( size_t i = 0; i < sizeof( k_rgubAlgoPrefix ); ++i )
+	{
+		if ( pDataPtr[ cDataLen - sizeof( k_rgubAlgoPrefix ) - k_nSHABytes + i ] != k_rgubAlgoPrefix[i] )
+			return false;
+	}
+	*pDigestOut = pDataPtr + cDataLen - k_nSHABytes;
+	return true;
+}
+
+MIN_CRYPTO_INLINE bool RSADecodeSignatureDigest( const uint8 *pubSignature, const uint32 cubSignature, 
+												 const uint8 *pubPublicKey, const uint32 cubPublicKey,
+												 uint8 *pDigestOut )
+{
+	for ( size_t i = 0; i < 20 /*size of SHA1 hash*/; ++i )
+		pDigestOut[i] = 0;
+
+	const uint8 *pModulusBigInt = NULL;
+	const uint8 *pExponentBigInt = NULL;
+	size_t cModulusBytes = 0;
+	size_t cExponentBytes = 0;
+	if ( !ExtractModulusAndExponentFromX509PubKey( pubPublicKey, cubPublicKey, &pModulusBigInt, &cModulusBytes, &pExponentBigInt, &cExponentBytes ) )
+		return false;
+
+	uint8 rsabuf[1024]; // large enough for an 8192-bit RSA key. in practice, anything over 3072 bits is crazytown.
+	uint32 cRSABufLen = sizeof( rsabuf );
+
+	CSimpleRSABigNum a, b, m;
+	a.SetFromBigEndianBytes( pubSignature, cubSignature );
+	b.SetFromBigEndianBytes( pExponentBigInt, (uint32)cExponentBytes );
+	m.SetFromBigEndianBytes( pModulusBigInt, (uint32)cModulusBytes );
+
+	if ( m.CountBytes() > cRSABufLen )
+		return false;
+
+	a.ExponentiateModulo( b, m );
+	if ( !a.CopyToBigEndianBytes( rsabuf, &cRSABufLen ) )
+		return false;
+
+	const uint8 *pSignedDigest = NULL;
+	if ( !ExtractSHA1DigestFromRSASignature( rsabuf, cRSABufLen, &pSignedDigest ) )
+		return false;
+
+	for ( size_t i = 0; i < 20 /*size of SHA1 hash*/; ++i )
+		pDigestOut[i] = pSignedDigest[i];
+
+	return true;
+}
+
+MIN_CRYPTO_INLINE bool RSAVerifySignature( const uint8 *pubData, const uint32 cubData, 
+                                           const uint8 *pubSignature, const uint32 cubSignature, 
+                                           const uint8 *pubPublicKey, const uint32 cubPublicKey )
+{
+	uint32 signedDigest[5];
+	if ( !RSADecodeSignatureDigest( pubSignature, cubSignature, pubPublicKey, cubPublicKey, (uint8*)signedDigest ) )
+		return false;
+
+	uint32 actualDigest[5];
+	ComputeSHA1Digest( pubData, cubData, (uint8*)actualDigest );
+
+	for ( size_t i = 0; i < 5; ++i )
+	{
+		if ( signedDigest[i] != actualDigest[i] )
+			return false;
+	}
+	return true;
+}
+
+
+// simple encrypt and decrypt
+// no blocks, no padding, not safe against timing or side-channel attacks
+// caveat emptor, understand these limits before use
+MIN_CRYPTO_INLINE bool RSASimpleEncrypt( const uint8 *pubInput, const uint32 cubInput, 
+												 const uint8 *pubPublicKey, const uint32 cubPublicKey,
+												 uint8 *pOut, uint32 *pcubOut, EMinCryptoError *pEMinCryptoError )
+{
+	*pEMinCryptoError = k_EMinCryptoErrorNone;
+
+	const uint8 *pModulusBigInt = NULL;
+	const uint8 *pExponentBigInt = NULL;
+	size_t cModulusBytes = 0;
+	size_t cExponentBytes = 0;
+	if ( !ExtractModulusAndExponentFromX509PubKey( pubPublicKey, cubPublicKey, &pModulusBigInt, &cModulusBytes, &pExponentBigInt, &cExponentBytes ) )
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorInvalidKey;
+		return false;
+	}
+
+	uint8 rsabuf[1024]; // large enough for an 8192-bit RSA key. in practice, anything over 3072 bits is crazytown.
+	uint32 cRSABufLen = sizeof( rsabuf );
+
+	CSimpleRSABigNum a, b, m;
+	a.SetFromBigEndianBytes( pubInput, cubInput );
+	b.SetFromBigEndianBytes( pExponentBigInt, (uint32)cExponentBytes );
+	m.SetFromBigEndianBytes( pModulusBigInt, (uint32)cModulusBytes );
+
+	if ( m.CountBytes() > cRSABufLen )
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorInternalBufferTooSmall;
+		return false;
+	}
+
+	a.ExponentiateModulo( b, m );
+	if ( !a.CopyToBigEndianBytes( rsabuf, &cRSABufLen ) )
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorInternalBufferTooSmall;
+		return false;
+	}
+
+	if ( cRSABufLen <= *pcubOut )
+	{
+		uint32 ibOffset = *pcubOut - cRSABufLen;
+		memset(pOut, 0, ibOffset);
+		memcpy(&pOut[ibOffset], rsabuf, cRSABufLen);
+		return true;
+	}
+	else
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorOutputBufferTooSmall;
+	}
+	*pcubOut = cRSABufLen;
+
+	return false;
+}
+
+
+// simple encrypt and decrypt
+// no blocks, no padding, not safe against timing or side-channel attacks
+// caveat emptor, understand these limits before use
+MIN_CRYPTO_INLINE bool RSASimpleDecrypt( const uint8 *pubInput, const uint32 cubInput, 
+												 const uint8 *pubPrivKey, const uint32 cubPrivKey,
+												 uint8 *pOut, uint32 *pcubOut, EMinCryptoError *pEMinCryptoError )
+{
+	*pEMinCryptoError = k_EMinCryptoErrorNone;
+
+	const uint8 *pModulusBigInt = NULL;
+	const uint8 *pExponentBigInt = NULL;
+	size_t cModulusBytes = 0;
+	size_t cExponentBytes = 0;
+	if ( !ExtractModulusAndExponentFromX509PrivKey( pubPrivKey, cubPrivKey, &pModulusBigInt, &cModulusBytes, &pExponentBigInt, &cExponentBytes ) )
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorInvalidKey;
+		return false;
+	}
+
+	uint8 rsabuf[1024]; // large enough for an 8192-bit RSA key. in practice, anything over 3072 bits is crazytown.
+	uint32 cRSABufLen = sizeof( rsabuf );
+
+	CSimpleRSABigNum a, b, m;
+	a.SetFromBigEndianBytes( pubInput, cubInput );
+	b.SetFromBigEndianBytes( pExponentBigInt, (uint32)cExponentBytes );
+	m.SetFromBigEndianBytes( pModulusBigInt, (uint32)cModulusBytes );
+
+	if ( m.CountBytes() > cRSABufLen )
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorInternalBufferTooSmall;
+		return false;
+	}
+
+	a.ExponentiateModulo( b, m );
+	if ( !a.CopyToBigEndianBytes( rsabuf, &cRSABufLen ) )
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorInternalBufferTooSmall;
+		return false;
+	}
+
+	if ( cRSABufLen <= *pcubOut )
+	{
+		uint32 ibOffset = *pcubOut - cRSABufLen;
+		memset( pOut, 0, ibOffset );
+		memcpy( &pOut[ibOffset], rsabuf, cRSABufLen );
+		// dont change *pcubOut
+		return true;
+	}
+	else
+	{
+		*pEMinCryptoError = k_EMinCryptoErrorOutputBufferTooSmall;
+	}
+	*pcubOut = cRSABufLen;
+
+	return false;
+}
+
+
+
+#endif // #ifndef _MIN_CRYPTO_IMPL_H

src/public/minbase/minbase_annotations.h

@@ -0,0 +1,152 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Static compilation analysis annotations.
+//
+//==========================================================================//
+
+#ifndef MINBASE_ANNOTATIONS_H
+#define MINBASE_ANNOTATIONS_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+// Pass hints to the compiler to prevent it from generating unnessecary / stupid code
+// in certain situations.  Several compilers other than MSVC also have an equivalent 
+// construct.
+//
+// Essentially the 'Hint' is that the condition specified is assumed to be true at 
+// that point in the compilation.  If '0' is passed, then the compiler assumes that
+// any subsequent code in the same 'basic block' is unreachable, and thus usually 
+// removed.
+#ifdef _MSC_VER
+	#define HINT(THE_HINT)	__assume((THE_HINT))
+#elif defined ( COMPILER_GCC ) && ( ( __GNUC__ > 4 || ( __GNUC__ == 4 && __GNUC_MINOR__ >= 5 ) ) || __clang__ )
+	#define HINT(THE_HINT)	do { if ( !(THE_HINT) ) __builtin_unreachable(); } while (0)
+#elif defined ( COMPILER_GCC ) || defined ( COMPILER_SNC ) 
+	#define HINT(THE_HINT)	__builtin_expect( THE_HINT, 1 )
+#else
+    #define HINT(THE_HINT)	(void)0
+#endif
+
+#if _MSC_VER >= 1600 // VS 2010 and above.
+// Suppress some code analysis warnings
+#ifdef _PREFAST_
+// Include the annotation header file.
+#include <sal.h>
+
+// /Analyze warnings can only be suppressed when using a compiler that supports them, which VS 2010
+// Professional does not.
+
+// We don't care about these warnings because they are bugs that can only occur during resource
+// exhaustion or other unexpected API failure, which we are nowhere near being able to handle.
+#pragma warning(disable : 6308) // warning C6308: 'realloc' might return null pointer: assigning null pointer to 's_ppTestCases', which is passed as an argument to 'realloc', will cause the original memory block to be leaked
+#pragma warning(disable : 6255) // warning C6255: _alloca indicates failure by raising a stack overflow exception. Consider using _malloca instead
+#pragma warning(disable : 6387) // warning C6387: 'argument 1' might be '0': this does not adhere to the specification for the function 'GetProcAddress'
+#pragma warning(disable : 6309) // warning C6309: Argument '1' is null: this does not adhere to function specification of 'GetProcAddress'
+#pragma warning(disable : 6011) // warning C6011: Dereferencing NULL pointer 'm_ppTestCases'
+#pragma warning(disable : 6211) // warning C6211: Leaking memory 'newKeyValue' due to an exception. Consider using a local catch block to clean up memory
+#pragma warning(disable : 6031) // warning C6031: Return value ignored: '_getcwd'
+
+// These warnings are because /analyze doesn't like our use of constants, especially things like IsPC()
+#pragma warning(disable : 6326) // warning C6326: Potential comparison of a constant with another constant
+#pragma warning(disable : 6239) // warning C6239: (<non-zero constant> && <expression>) always evaluates to the result of <expression>. Did you intend to use the bitwise-and operator?
+#pragma warning(disable : 6285) // warning C6285: (<non-zero constant> || <non-zero constant>) is always a non-zero constant. Did you intend to use the bitwise-and operator?
+#pragma warning(disable : 6237) // warning C6237: (<zero> && <expression>) is always zero. <expression> is never evaluated and might have side effects
+#pragma warning(disable : 6235) // warning C6235: (<non-zero constant> || <expression>) is always a non-zero constant
+#pragma warning(disable : 6240) // warning C6240: (<expression> && <non-zero constant>) always evaluates to the result of <expression>. Did you intend to use the bitwise-and operator?
+
+// These warnings aren't really important:
+#pragma warning(disable : 6323) // warning C6323: Use of arithmetic operator on Boolean type(s)
+
+// Miscellaneous other /analyze warnings. We should consider fixing these at some point.
+//#pragma warning(disable : 6204) // warning C6204: Possible buffer overrun in call to 'memcpy': use of unchecked parameter 'src'
+//#pragma warning(disable : 6262) // warning C6262: Function uses '16464' bytes of stack: exceeds /analyze:stacksize'16384'. Consider moving some data to heap
+// This is a serious warning. Don't suppress it.
+//#pragma warning(disable : 6263) // warning C6263: Using _alloca in a loop: this can quickly overflow stack
+// 6328 is also used for passing __int64 to printf when int is expected so we can't suppress it.
+//#pragma warning(disable : 6328) // warning C6328: 'char' passed as parameter '1' when 'unsigned char' is required in call to 'V_isdigit'
+// /analyze doesn't like GCOMPILER_ASSERT's implementation of compile-time asserts
+#pragma warning(disable : 6326) // warning C6326: Potential comparison of a constant with another constant
+#pragma warning(disable : 6335) // warning C6335: Leaking process information handle 'pi.hThread'
+#pragma warning(disable : 6320) // warning C6320: Exception-filter expression is the constant EXCEPTION_EXECUTE_HANDLER. This might mask exceptions that were not intended to be handled
+#pragma warning(disable : 6250) // warning C6250: Calling 'VirtualFree' without the MEM_RELEASE flag might free memory but not address descriptors (VADs). This causes address space leaks
+#pragma warning(disable : 6384) // ientity2_class_h_schema_gen.cpp(76): warning C6384: Dividing sizeof a pointer by another value
+
+// For temporarily suppressing warnings -- the warnings are suppressed for the next source line.
+#define ANALYZE_SUPPRESS(wnum) __pragma(warning(suppress: wnum))
+#define ANALYZE_SUPPRESS2(wnum1, wnum2) __pragma(warning(supress: wnum1  wnum2))
+#define ANALYZE_SUPPRESS3(wnum1, wnum2, wnum3) __pragma(warning(suppress: wnum1 wnum2 wnum3))
+#define ANALYZE_SUPPRESS4(wnum1, wnum2, wnum3, wnum4) __pragma(warning(suppress: wnum1 wnum2 wnum3 wnum4))
+
+// Tag all printf-style format strings with this (consumed by MSVC).
+#define PRINTF_FORMAT_STRING _Printf_format_string_
+#define SCANF_FORMAT_STRING _Scanf_format_string_impl_
+
+// Various macros for specifying the capacity of the buffer pointed
+// to by a function parameter. Variations include in/out/inout,
+// CAP (elements) versus BYTECAP (bytes), and null termination or
+// not (_Z).
+#define IN_Z _In_z_
+#define IN_CAP(x) _In_count_(x)
+#define IN_BYTECAP(x) _In_bytecount_(x)
+#define OUT_Z_CAP(x) _Out_z_cap_(x)
+#define OUT_CAP(x) _Out_cap_(x)
+#define OUT_BYTECAP(x) _Out_bytecap_(x)
+#define OUT_Z_BYTECAP(x) _Out_z_bytecap_(x)
+#define INOUT_BYTECAP(x) _Inout_bytecap_(x)
+#define INOUT_Z_CAP(x) _Inout_z_cap_(x)
+#define INOUT_Z_BYTECAP(x) _Inout_z_bytecap_(x)
+// These macros are use for annotating array reference parameters, typically used in functions
+// such as V_strcpy_safe. Because they are array references the capacity is already known.
+#if _MSC_VER >= 1700
+#define IN_Z_ARRAY _Pre_z_
+#define OUT_Z_ARRAY _Post_z_
+#define INOUT_Z_ARRAY _Prepost_z_
+#else
+#define IN_Z_ARRAY _Deref_pre_z_
+#define OUT_Z_ARRAY _Deref_post_z_
+#define INOUT_Z_ARRAY _Deref_prepost_z_
+#endif // _MSC_VER >= 1700
+// Use the macros above to annotate string functions that fill buffers as shown here,
+// in order to give VS's /analyze more opportunities to find bugs.
+// void V_wcsncpy( OUT_Z_BYTECAP(maxLenInBytes) wchar_t *pDest, wchar_t const *pSrc, int maxLenInBytes );
+// int V_snwprintf( OUT_Z_CAP(maxLenInCharacters) wchar_t *pDest, int maxLenInCharacters, PRINTF_FORMAT_STRING const wchar_t *pFormat, ... );
+
+#endif // _PREFAST_
+#endif // _MSC_VER >= 1600 // VS 2010 and above.
+
+#ifndef ANALYZE_SUPPRESS
+#define ANALYZE_SUPPRESS(wnum)
+#define ANALYZE_SUPPRESS2(wnum1, wnum2)
+#define ANALYZE_SUPPRESS3(wnum1, wnum2, wnum3)
+#define ANALYZE_SUPPRESS4(wnum1, wnum2, wnum3, wnum4)
+// Tag all printf-style format strings with this (consumed by MSVC).
+#define PRINTF_FORMAT_STRING
+#define SCANF_FORMAT_STRING
+#define IN_Z
+#define IN_CAP(x)
+#define IN_BYTECAP(x)
+#define OUT_Z_CAP(x)
+#define OUT_CAP(x)
+#define OUT_BYTECAP(x)
+#define OUT_Z_BYTECAP(x)
+#define INOUT_BYTECAP(x)
+#define INOUT_Z_CAP(x)
+#define INOUT_Z_BYTECAP(x)
+#define OUT_Z_ARRAY
+#define INOUT_Z_ARRAY
+#endif
+
+// Tag the end of functions using printf-style format strings with this (consumed by GCC).
+// Note that for methods the 'this' pointer counts as the first argument in argument numbering.
+#ifdef COMPILER_GCC
+#define FMTFUNCTION( fmtargnumber, firstvarargnumber ) __attribute__ (( format( __printf__, fmtargnumber, firstvarargnumber )))
+#else
+#define FMTFUNCTION( fmtargnumber, firstvarargnumber )
+#endif
+
+#endif // #ifndef MINBASE_ANNOTATIONS_H

src/public/minbase/minbase_common_errors.cpp

@@ -0,0 +1,64 @@
+//===== Copyright © 2012-2012, Valve Corporation, All rights reserved. =====//
+//
+// Common error mapping functions.
+// This is intended to be included in an implementation file instead
+// of being standalone.
+//
+//==========================================================================//
+
+#include "minbase_identify.h"
+#include "minbase_common_errors.h"
+#include "errno.h"
+
+ECommonError TranslateCommonErrno()
+{
+    switch(errno)
+    {
+    case EPERM:
+    case EACCES:
+        return k_EErrAccessDenied;
+    case ENOENT:
+    case ESRCH:
+        return k_EErrNotFound;
+    case EBADF:
+        return k_EErrInvalidParameter;
+    case ENOMEM:
+        return k_EErrOutOfMemory;
+    case EEXIST:
+        return k_EErrAlreadyExists;
+    default:
+        return k_EErrUnknownError;
+    }
+}
+
+#if defined(_WIN32)
+
+ECommonError TranslateCommonLastError()
+{
+    switch(GetLastError())
+    {
+    case ERROR_NOT_ENOUGH_MEMORY:
+    case ERROR_OUTOFMEMORY:
+        return k_EErrOutOfMemory;
+    case ERROR_ACCESS_DENIED:
+        return k_EErrAccessDenied;
+    case ERROR_FILE_NOT_FOUND:
+    case ERROR_PATH_NOT_FOUND:
+        return k_EErrNotFound;
+    case ERROR_INVALID_PARAMETER:
+    case ERROR_INVALID_HANDLE:
+        return k_EErrInvalidParameter;
+    case ERROR_ALREADY_EXISTS:
+        return k_EErrAlreadyExists;
+    case ERROR_HANDLE_EOF:
+        return k_EErrEndOfFile;
+    case ERROR_HANDLE_DISK_FULL:
+        return k_EErrDiskFull;
+    case ERROR_NOT_SUPPORTED:
+        return k_EErrNotSupported;
+    default:
+        return k_EErrUnknownError;
+    }
+}
+
+#endif // #if defined(_WIN32)

src/public/minbase/minbase_common_errors.h

@@ -0,0 +1,52 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Portable abstract error codes.
+//
+//==========================================================================//
+
+#ifndef MINBASE_COMMON_ERRORS_H
+#define MINBASE_COMMON_ERRORS_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+enum ECommonError
+{
+    k_EErrNoError,
+    
+    // Negative result for success cases that aren't complete success.
+    k_EErrNoErrorNegative,
+
+    k_EErrInternalError,
+    k_EErrGenericError,
+    k_EErrUnknownError,
+    k_EErrIncompleteOperation,
+    k_EErrInvalidParameter,
+    k_EErrInvalidRequest,
+    k_EErrInvalidState,
+    k_EErrInvalidFormat,
+    k_EErrAlreadyOpen,
+    k_EErrAlreadyExists,
+    k_EErrAccessDenied,
+    k_EErrOutOfMemory,
+    k_EErrEndOfFile,
+    k_EErrDiskFull,
+    k_EErrNotFound,
+    k_EErrBufferOverflow,
+    k_EErrIntegerOverflow,
+    k_EErrNotSupported,
+    k_EErrNotImplemented,
+
+    k_EErrMaximumEnumValue
+};
+
+ECommonError TranslateCommonErrno();
+#if defined(_WIN32)
+ECommonError TranslateCommonLastError();
+#endif
+
+#endif // #ifndef MINBASE_COMMON_ERRORS_H

src/public/minbase/minbase_decls.h

@@ -0,0 +1,240 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Portable declaration decorations.
+//
+//==========================================================================//
+
+#ifndef MINBASE_DECLS_H
+#define MINBASE_DECLS_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+// Use this to specify that a function is an override of a virtual function.
+// This lets the compiler catch cases where you meant to override a virtual
+// function but you accidentally changed the function signature and created
+// an overloaded function. Usage in function declarations is like this:
+// int GetData() const OVERRIDE;
+#ifndef OVERRIDE
+#define OVERRIDE override
+#endif
+
+// This can be used to ensure the size of pointers to members when declaring
+// a pointer type for a class that has only been forward declared
+#ifdef _MSC_VER
+	#define SINGLE_INHERITANCE __single_inheritance
+	#define MULTIPLE_INHERITANCE __multiple_inheritance
+#else
+	#define SINGLE_INHERITANCE
+	#define MULTIPLE_INHERITANCE
+#endif
+
+#ifdef _MSC_VER
+	#define NO_VTABLE __declspec( novtable )
+#else
+	#define NO_VTABLE
+#endif
+
+// This can be used to declare an abstract (interface only) class.
+// Classes marked abstract should not be instantiated.  If they are, and access violation will occur.
+//
+// Example of use:
+//
+// abstract_class CFoo
+// {
+//      ...
+// }
+//
+// MSDN __declspec(novtable) documentation: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclang/html/_langref_novtable.asp
+//
+// Note: NJS: This is not enabled for regular PC, due to not knowing the implications of exporting a class with no no vtable.
+//       It's probable that this shouldn't be an issue, but an experiment should be done to verify this.
+//
+#ifndef _XBOX
+	#define abstract_class class
+#else
+	#define abstract_class class NO_VTABLE
+#endif
+
+// C functions for external declarations that call the appropriate C++ methods
+#ifndef EXPORT
+	#ifdef _WIN32
+		#define EXPORT	_declspec( dllexport )
+	#else
+		#define EXPORT	/* */
+	#endif
+#endif
+
+// decls for aligning data
+#ifdef _WIN32
+	#define DECL_ALIGN(x) __declspec(align(x))
+#elif defined(GNUC)
+	#define DECL_ALIGN(x) __attribute__((aligned(x)))
+#elif defined ( COMPILER_GCC ) || defined( COMPILER_SNC )
+	#define DECL_ALIGN(x)			__attribute__( ( aligned( x ) ) )
+#else
+	#define DECL_ALIGN(x) /* */
+#endif
+
+#ifdef _MSC_VER
+	// MSVC has the align at the start of the struct
+	#define ALIGN8 DECL_ALIGN(8)
+	#define ALIGN16 DECL_ALIGN(16)
+	#define ALIGN32 DECL_ALIGN(32)
+	#define ALIGN128 DECL_ALIGN(128)
+
+	#define ALIGN8_POST
+	#define ALIGN16_POST
+	#define ALIGN32_POST
+	#define ALIGN128_POST
+#elif defined( GNUC ) || defined( COMPILER_PS3 )
+	// gnuc has the align decoration at the end
+	#define ALIGN4
+	#define ALIGN8
+	#define ALIGN16
+	#define ALIGN32
+	#define ALIGN128
+
+	#define ALIGN4_POST DECL_ALIGN(4)
+	#define ALIGN8_POST DECL_ALIGN(8)
+	#define ALIGN16_POST DECL_ALIGN(16)
+	#define ALIGN32_POST DECL_ALIGN(32)
+	#define ALIGN128_POST DECL_ALIGN(128)
+#else
+	#error
+#endif
+
+#if _MSC_VER >= 1400
+
+#define NOALIAS __declspec(noalias)
+#define RESTRICT				__restrict
+#define RESTRICT_FUNC			__declspec(restrict)
+
+#else	// _MSC_VER >= 1400
+
+#define NOALIAS
+#define RESTRICT
+#define RESTRICT_FUNC
+
+#endif	// _MSC_VER >= 1400
+
+// Linux had a few areas where it didn't construct objects in the same order that Windows does.
+// So when CVProfile::CVProfile() would access g_pMemAlloc, it would crash because the allocator wasn't initalized yet.
+#if defined( GNUC ) || defined ( COMPILER_GCC ) || defined( COMPILER_SNC )
+	#define CONSTRUCT_EARLY __attribute__((init_priority(101)))
+#else
+	#define CONSTRUCT_EARLY
+#endif
+
+#ifdef _WIN32
+	#define SELECTANY __declspec(selectany)
+#elif defined(GNUC) || defined ( COMPILER_GCC ) || defined( COMPILER_SNC )
+	#define SELECTANY __attribute__((weak))
+#else
+	#define SELECTANY static
+#endif
+
+#undef DLL_EXPORT
+#undef DLL_IMPORT
+
+#if defined(_WIN32) && !defined(_XBOX)
+#define PLAT_DECL_EXPORT __declspec( dllexport )
+#define PLAT_DECL_IMPORT __declspec( dllimport )
+#elif defined(GNUC) || defined(COMPILER_GCC)
+#define PLAT_DECL_EXPORT __attribute__((visibility("default")))
+#define PLAT_DECL_IMPORT
+#elif defined(_XBOX) || defined(COMPILER_SNC)
+#define PLAT_DECL_EXPORT
+#define PLAT_DECL_IMPORT
+#else
+#error "Unsupported Platform."
+#endif
+
+#if defined(_XBOX)
+#define DLL_EXPORT extern
+#define DLL_IMPORT extern
+
+#define DLL_CLASS_EXPORT
+#define DLL_CLASS_IMPORT
+
+#define DLL_GLOBAL_EXPORT
+#define DLL_GLOBAL_IMPORT
+#else
+// Used for dll exporting and importing
+#define DLL_EXPORT extern "C" PLAT_DECL_EXPORT
+#define DLL_IMPORT extern "C" PLAT_DECL_IMPORT
+
+// Can't use extern "C" when DLL exporting a class
+#define DLL_CLASS_EXPORT PLAT_DECL_EXPORT
+#define DLL_CLASS_IMPORT PLAT_DECL_IMPORT
+
+#define DLL_GLOBAL_EXPORT PLAT_DECL_EXPORT
+#define DLL_GLOBAL_IMPORT extern PLAT_DECL_IMPORT
+#endif
+
+// Used for standard calling conventions
+#if defined(_WIN32)
+	#define STDCALL				    __stdcall
+	#define FASTCALL				__fastcall
+#elif defined(_PS3)
+	#if defined( COMPILER_SNC )
+		#define  STDCALL
+		#define  __stdcall
+	#elif (CROSS_PLATFORM_VERSION >= 1) && !defined( PLATFORM_64BITS ) && !defined( COMPILER_PS3 )
+		#define  STDCALL			__attribute__ ((__stdcall__))
+	#else
+		#define  STDCALL
+		#define  __stdcall			__attribute__ ((__stdcall__))
+	#endif
+    #define FASTCALL
+#elif defined(POSIX)
+    #define __stdcall
+    #define __cdecl
+    #define STDCALL
+    #define FASTCALL
+#endif
+
+#if defined(_WIN32)
+	#define NOINLINE			    __declspec(noinline)
+	#define NORETURN				__declspec(noreturn)
+	#define FORCEINLINE			    __forceinline
+#elif defined(GNUC) || defined(COMPILER_GCC) || defined(COMPILER_SNC)
+	#define NOINLINE				__attribute__ ((noinline))
+	#define NORETURN				__attribute__ ((noreturn))
+    #if defined(COMPILER_GCC) || defined(COMPILER_SNC)
+	    #define FORCEINLINE          inline __attribute__ ((always_inline))
+    	// GCC 3.4.1 has a bug in supporting forced inline of templated functions
+    	// this macro lets us not force inlining in that case
+    	#define FORCEINLINE_TEMPLATE inline
+    #else
+        #define FORCEINLINE          inline
+        #define FORCEINLINE_TEMPLATE inline
+    #endif
+#endif
+
+// We have some template functions declared in header files that
+// only need static scope. Older MSVC version lets you use 'static' qualifiers
+// but GCC and new MSVC does not, where we need to use 'inline' to avoid multiple definitions.
+#ifdef COMPILER_MSVC32
+#if _MSC_VER <= 1910
+#define STATIC_TEMPLATE_INLINE static
+#else
+#define STATIC_TEMPLATE_INLINE inline
+#endif
+#else
+#define STATIC_TEMPLATE_INLINE inline
+#endif
+
+#if !defined(UNALIGNED)
+#if defined(_M_IA64) || defined(_M_AMD64)
+#define UNALIGNED __unaligned
+#else
+#define UNALIGNED
+#endif
+#endif
+
+#endif // #ifndef MINBASE_DECLS_H

src/public/minbase/minbase_endian.h

@@ -0,0 +1,179 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Endianness handling.
+//
+//==========================================================================//
+
+#ifndef MINBASE_ENDIAN_H
+#define MINBASE_ENDIAN_H
+#pragma once
+
+#if !defined(MINBASE_TYPES_H) || !defined(MINBASE_MACROS_H)
+#error Must include minbase_types.h and minbase_macros.h
+#endif
+
+//-----------------------------------------------------------------------------
+// Purpose: Standard functions for handling endian-ness
+//-----------------------------------------------------------------------------
+
+//-------------------------------------
+// Basic swaps
+//-------------------------------------
+
+template <typename T>
+inline T WordSwapC( T w )
+{
+	PLAT_COMPILE_TIME_ASSERT( sizeof(T) == sizeof(uint16) );
+	uint16 temp;
+#if defined( _MSC_VER ) || defined( __ICC )
+	temp = _byteswap_ushort( *(uint16*)&w );
+#else
+	// This translates into a single rotate on x86/x64
+	temp = *(uint16 *)&w;
+	temp = (temp << 8) | (temp >> 8);
+#endif
+	return *((T*)&temp);
+}
+
+template <typename T>
+inline T DWordSwapC( T dw )
+{
+	PLAT_COMPILE_TIME_ASSERT( sizeof( T ) == sizeof(uint32) );
+	uint32 temp;
+#if defined( _MSC_VER ) || defined( __ICC )
+	temp = _byteswap_ulong( *(uint32*)&dw );
+#elif defined( __clang__ ) || defined( __GNUC__ )
+	temp = __builtin_bswap32( *(uint32*)&dw );
+#else
+	temp = *((uint32 *)&dw) 				>> 24;
+	temp |= ((*((uint32 *)&dw) & 0x00FF0000) >> 8);
+	temp |= ((*((uint32 *)&dw) & 0x0000FF00) << 8);
+	temp |= (*((uint32 *)&dw) << 24;
+#endif
+   return *((T*)&temp);
+}
+
+template <typename T>
+inline T QWordSwapC( T dw )
+{
+	PLAT_COMPILE_TIME_ASSERT( sizeof( dw ) == sizeof(uint64) );
+	uint64 temp;
+#if defined( _MSC_VER ) || defined( __ICC )
+	temp = _byteswap_uint64( *(uint64*)&dw );
+#elif defined( __clang__ ) || defined( __GNUC__ )
+	temp = __builtin_bswap64( *(uint64*)&dw );
+#else
+	temp = (uint64)DWordSwapC( (uint32)( ( *(uint64*)&dw ) >> 32 ) );
+	temp |= (uint64)DWordSwapC( (uint32)( *(uint64*)&dw ) ) << 32;
+#endif
+	return *((T*)&temp);
+}
+
+#define WordSwap  WordSwapC
+#define DWordSwap DWordSwapC
+#define QWordSwap QWordSwapC
+
+#if defined(VALVE_LITTLE_ENDIAN)
+
+	#define BigInt16( val )		WordSwap( val )
+	#define BigWord( val )		WordSwap( val )
+	#define BigInt32( val )		DWordSwap( val )
+	#define BigDWord( val )		DWordSwap( val )
+	#define BigQWord( val )		QWordSwap( val ) 
+	#define BigFloat( val )		DWordSwap( val )
+	#define LittleInt16( val )	( val )
+	#define LittleWord( val )	( val )
+	#define LittleInt32( val )	( val )
+	#define LittleDWord( val )	( val )
+	#define LittleQWord( val )	( val )
+
+	#define LittleFloat( val )	( val )
+
+#elif defined(VALVE_BIG_ENDIAN)
+
+	#define BigInt16( val )		( val )
+	#define BigWord( val )		( val )
+	#define BigInt32( val )		( val )
+	#define BigDWord( val )		( val )
+	#define BigQWord( val )		( val )
+	#define BigFloat( val )		( val )
+	#define LittleInt16( val )	WordSwap( val )
+	#define LittleWord( val )	WordSwap( val )
+	#define LittleInt32( val )	DWordSwap( val )
+	#define LittleDWord( val )	DWordSwap( val )
+	#define LittleQWord( val )	QWordSwap( val )
+	#define LittleFloat( val )	DWordSwap( val )
+
+#else
+
+	// @Note (toml 05-02-02): this technique expects the compiler to 
+	// optimize the expression and eliminate the other path. On any new 
+	// platform/compiler this should be tested.
+	inline short BigInt16( int16 val )		{ int test = 1; return ( *(char *)&test == 1 ) ? WordSwap( val )  : val; }
+	inline uint16 BigWord( uint16 val )		{ int test = 1; return ( *(char *)&test == 1 ) ? WordSwap( val )  : val; }
+	inline int32 BigInt32( int32 val )		{ int test = 1; return ( *(char *)&test == 1 ) ? DWordSwap( val ) : val; }
+	inline uint32 BigDWord( uint32 val )	{ int test = 1; return ( *(char *)&test == 1 ) ? DWordSwap( val ) : val; }
+	inline uint64 BigQWord( uint64 val )	{ int test = 1; return ( *(char *)&test == 1 ) ? QWordSwap( val ) : val; }
+	inline float BigFloat( float val )		{ int test = 1; return ( *(char *)&test == 1 ) ? DWordSwap( val ) : val; }
+	inline short LittleInt16( int16 val )	{ int test = 1; return ( *(char *)&test == 1 ) ? val : WordSwap( val ); }
+	inline uint16 LittleWord( uint16 val )	{ int test = 1; return ( *(char *)&test == 1 ) ? val : WordSwap( val ); }
+    inline long LittleInt32( int32 val )		{ int test = 1; return ( *(char *)&test == 1 ) ? val : DWordSwap( val ); }
+	inline uint32 LittleDWord( uint32 val )	{ int test = 1; return ( *(char *)&test == 1 ) ? val : DWordSwap( val ); }
+	inline uint64 LittleQWord( uint64 val )	{ int test = 1; return ( *(char *)&test == 1 ) ? val : QWordSwap( val ); }
+	inline float LittleFloat( float val )	{ int test = 1; return ( *(char *)&test == 1 ) ? val : DWordSwap( val ); }
+
+#endif
+
+#ifdef VALVE_BIG_ENDIAN
+	#if defined ( _PS3 )
+		inline uint32 LoadLittleDWord( uint32 *base, unsigned int dwordIndex )
+		{
+			return __lwbrx( base + dwordIndex );
+		}
+
+		inline void StoreLittleDWord( uint32 *base, unsigned int dwordIndex, uint32 dword )
+		{
+			__stwbrx( base + dwordIndex, dword );
+		}
+		inline uint64 LoadLittleInt64( uint64 *base, unsigned int nWordIndex )
+		{
+			return __ldbrx( base + nWordIndex );
+		}
+
+		inline void StoreLittleInt64( uint64 *base, unsigned int nWordIndex, uint64 nWord )
+		{
+			__stdbrx( base + nWordIndex, nWord );
+		}
+	#else
+		inline uint32 LoadLittleDWord( uint32 *base, unsigned int dwordIndex )
+		{
+			return __loadwordbytereverse( dwordIndex<<2, base );
+		}
+
+		inline void StoreLittleDWord( uint32 *base, unsigned int dwordIndex, uint32 dword )
+		{
+			__storewordbytereverse( dword, dwordIndex<<2, base );
+		}
+		inline uint64 LoadLittleInt64( uint64 *base, unsigned int nWordIndex )
+		{
+			return __loaddoublewordbytereverse( nWordIndex<<2, base );
+		}
+
+		inline void StoreLittleInt64( uint64 *base, unsigned int nWordIndex, uint64 nWord )
+		{
+			__storedoublewordbytereverse( nWord, nWordIndex<<2, base );
+		}
+	#endif
+#else
+	inline uint32 LoadLittleDWord( uint32 *base, unsigned int dwordIndex )
+	{
+		return LittleDWord( base[dwordIndex] );
+	}
+
+	inline void StoreLittleDWord( uint32 *base, unsigned int dwordIndex, uint32 dword )
+	{
+		base[dwordIndex] = LittleDWord(dword);
+	}
+#endif
+
+#endif // #ifndef MINBASE_ENDIAN_H

src/public/minbase/minbase_identify.h

@@ -0,0 +1,206 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Compiler/platform identification to provide a consistent set of
+// macros for places that need to specialize behavior.
+//
+//==========================================================================//
+
+#ifndef MINBASE_IDENTIFY_H
+#define MINBASE_IDENTIFY_H
+#pragma once
+
+#if defined(__x86_64__) || defined(__arm64__) || defined(__aarch64__) || defined(_WIN64)
+	#define X64BITS
+	#define PLATFORM_64BITS
+#endif // __x86_64__
+
+#ifdef SN_TARGET_PS3
+
+	#define _PS3 1
+	#define COMPILER_PS3 1
+	#define PLATFORM_PS3 1
+	#define PLATFORM_PPC 1
+
+	// There are 2 compilers for the PS3: GCC and the SN Systems compiler.
+	// They are mostly similar, but in a few places we need to distinguish between the two.
+	#if defined( __SNC__ )
+		#define COMPILER_SNC 1
+	#elif defined( __GCC__ )
+		#define COMPILER_GCC 1
+	#else
+		#error "Unrecognized PS3 compiler; either __SNC__ or __GCC__ must be defined"
+	#endif
+
+#endif // SN_TARGET_PS3 
+
+#if !defined(COMPILER_GCC) && (defined(__GCC__) || defined(__GNUC__))
+	#define COMPILER_GCC 1
+#endif
+
+#if !defined(COMPILER_CLANG) && defined(__clang__)
+    #define COMPILER_CLANG 1
+#endif
+
+#ifdef _MSC_VER
+	#define COMPILER_MSVC32 1
+	#if defined( _M_X64 )
+		#define COMPILER_MSVC64 1
+	#endif
+#endif
+
+#if ( defined(LINUX) || defined(OSX) || defined(ANDROID) ) && !defined(POSIX)
+	#define POSIX
+#endif
+
+#if defined(_WIN32) && !defined(WINDED)
+	#if defined(_M_IX86)
+		#define __i386__	1
+	#elif defined(_M_X64)
+		#define __x86_64__	1
+	#endif
+#endif
+
+#if ( defined(__i386__) || defined( __x86_64__ ) || defined(__arm__) || defined(__arm64__) || defined(__aarch64__) || defined(_XBOX) ) && !defined(VALVE_LITTLE_ENDIAN)
+#define VALVE_LITTLE_ENDIAN 1
+#endif
+
+#if ( defined( _SGI_SOURCE ) || defined( _PS3 ) ) && !defined(VALVE_BIG_ENDIAN)
+#define	VALVE_BIG_ENDIAN 1
+#endif
+
+#if defined( VALVE_LITTLE_ENDIAN ) == defined( VALVE_BIG_ENDIAN )
+	#error "Cannot determine endianness of platform!"
+#endif
+
+
+
+// Detect C++11 support for "rvalue references" / "move semantics" / other C++11 (and up) stuff
+#if defined(_MSC_VER)
+	#if _MSC_VER >= 1600
+		#define VALVE_RVALUE_REFS 1
+	#endif
+	#if _MSC_VER >= 1800
+		#define VALVE_INITIALIZER_LIST_SUPPORT 1
+		#define VALVE_EXPLICIT_CONVERSION_OP 1
+	#endif
+#elif defined(__clang__)
+	#if __has_extension(cxx_rvalue_references)
+		#define VALVE_RVALUE_REFS 1
+	#endif
+	#if __has_feature(cxx_generalized_initializers)
+		#define VALVE_INITIALIZER_LIST_SUPPORT 1
+	#endif
+	#if __has_feature(cxx_explicit_conversions)
+		#define VALVE_EXPLICIT_CONVERSION_OP 1
+	#endif
+#elif defined(__GNUC__)
+	#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6 )
+		#if defined(__GXX_EXPERIMENTAL_CXX0X__)
+			#define VALVE_RVALUE_REFS 1
+			#define VALVE_INITIALIZER_LIST_SUPPORT 1
+			#define VALVE_EXPLICIT_CONVERSION_OP 1
+		#endif
+	#endif
+#endif
+
+
+#ifdef _RETAIL
+	#define IsRetail() true 
+#else
+	#define IsRetail() false
+#endif
+
+#ifdef _DEBUG
+	#define IsRelease() false
+	#define IsDebug() true
+#else
+	#define IsRelease() true
+	#define IsDebug() false
+#endif
+
+#ifdef _WIN32
+	#define IsWindows() true
+	#define IsPosix() false
+	#define IsLinux() false
+	#define IsOSX() false
+	#define IsPS3() false
+	#define IsX360() false
+	#ifndef _XBOX
+		#define IsPC() true
+		#define IsConsole() false
+		#define IsXbox() false
+	#else
+		#ifndef _CONSOLE
+			#define _CONSOLE
+		#endif
+		#define IsPC() false
+		#define IsConsole() true
+		#define IsXbox() true
+	#endif
+	#define IsARM() false
+	#define IsAndroid() false
+
+#elif defined( _PS3 )
+	#define IsWindows() false
+	#define IsPC() false
+	#define IsConsole() true
+	#define IsXbox() false
+	#define IsLinux() false
+	#define IsPosix() true
+	#define IsOSX() false
+	#define IsPS3() true
+	#define IsX360() false
+	#define IsARM() false
+	#define IsAndroid() false
+	#ifndef _CONSOLE
+		#define _CONSOLE
+	#endif
+
+#elif defined( _X360 )
+	#define IsWindows() false
+	#define IsPC() false
+	#define IsConsole() true
+	#define IsXbox() false
+	#define IsLinux() false
+	#define IsPosix() false
+	#define IsOSX() false
+	#define IsPS3() false
+	#define IsX360() true
+	#define IsARM() false
+	#define IsAndroid() false
+
+#elif defined(POSIX)
+	#define IsWindows() false
+	#define IsPC() true
+	#define IsConsole() false
+	#define IsXbox() false
+	#define IsPosix() true
+#if defined(LINUX)
+	#define IsLinux() true
+#else
+	#define IsLinux() false
+#endif
+#if defined(OSX)
+	#define SUPPORTS_IOPOLLINGHELPER
+	#define IsOSX() true
+#else
+	#define IsOSX() false
+#endif
+	#define IsPS3() false
+	#define IsX360() false
+#if defined(__arm__)
+	#define IsARM() true
+#else
+	#define IsARM() false
+#endif
+#if defined(ANDROID)
+	#define IsAndroid() true
+#else
+	#define IsAndroid() false
+#endif
+
+#else
+#error Undefined platform
+#endif
+
+#endif // #ifndef MINBASE_IDENTIFY_H

src/public/minbase/minbase_limits.h

@@ -0,0 +1,68 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Limit values for portable types.
+//
+//==========================================================================//
+
+#ifndef MINBASE_LIMITS_H
+#define MINBASE_LIMITS_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+// Avoid collisions with other people including the regular CRT limits.h.
+#ifdef _MSC_VER
+#include <limits.h>
+#if _MSC_VER >= 1800 // VS 2013
+// Avoid collisions with other people including the regular CRT stdint.h.
+#include <stdint.h>
+#endif
+#endif
+
+#undef INT8_MAX
+#undef INT8_MIN
+#define INT8_MAX ((int8)0x7f)
+#define INT8_MIN ((int8)0x80)
+
+#undef UINT8_MAX
+#define UINT8_MAX ((uint8)0xff)
+
+#undef INT16_MAX
+#undef INT16_MIN
+#define INT16_MAX ((int16)0x7fff)
+#define INT16_MIN ((int16)0x8000)
+
+#undef UINT16_MAX
+#define UINT16_MAX ((uint16)0xffff)
+
+#undef INT32_MAX
+#undef INT32_MIN
+#define INT32_MAX ((int32)0x7fffffff)
+#define INT32_MIN ((int32)0x80000000)
+
+#undef UINT32_MAX
+#define UINT32_MAX ((uint32)0xffffffff)
+
+#undef INT64_MAX
+#undef INT64_MIN
+#define INT64_MAX ((int64)0x7fffffffffffffff)
+#define INT64_MIN ((int64)0x8000000000000000)
+
+#undef UINT64_MAX
+#define UINT64_MAX ((uint64)0xffffffffffffffff)
+
+#undef SIZE_MAX
+#if defined(PLATFORM_64BITS)
+#define SIZE_MAX ((size_t)UINT64_MAX)
+#else
+#define SIZE_MAX ((size_t)UINT32_MAX)
+#endif
+
+#undef UINT_MAX
+#define UINT_MAX ((uint)-1)
+
+#endif // #ifndef MINBASE_LIMITS_H

src/public/minbase/minbase_macros.h

@@ -0,0 +1,331 @@
+//====== Copyright 1996-2013, Valve Corporation, All rights reserved. ======//
+//
+// Fundamental macros and defines.
+//
+//==========================================================================//
+
+#ifndef MINBASE_MACROS_H
+#define MINBASE_MACROS_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+// Decls are needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_DECLS_H
+#error Must include minbase_decls.h
+#endif
+
+#define UID_PREFIX generated_id_
+#define UID_CAT1(a,c) a ## c
+#define UID_CAT2(a,c) UID_CAT1(a,c)
+#define EXPAND_CONCAT(a,c) UID_CAT1(a,c)
+#define UNIQUE_ID UID_CAT2(UID_PREFIX,__COUNTER__)
+
+//-----------------------------------------------------------------------------
+// Macro to assist in asserting constant invariants during compilation
+//
+// If available use static_assert instead of weird language tricks. This
+// leads to much more readable messages when compile time assert constraints
+// are violated.
+#if !defined(OSX) && (_MSC_VER > 1500 || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
+	#define PLAT_COMPILE_TIME_ASSERT( pred ) static_assert( pred, "Compile time assert constraint is not true: " #pred )
+#else
+	#define PLAT_COMPILE_TIME_ASSERT( pred ) typedef int UNIQUE_ID[ (pred) ? 1 : -1]
+#endif
+
+#if !defined( COMPILE_TIME_ASSERT )
+#define COMPILE_TIME_ASSERT( pred ) PLAT_COMPILE_TIME_ASSERT( pred )
+#endif
+#if !defined( ASSERT_INVARIANT )
+#define ASSERT_INVARIANT( pred ) PLAT_COMPILE_TIME_ASSERT( pred )
+#endif
+
+#if defined(_WIN32)
+#define PLAT_DLL_EXT "dll"
+#elif defined(LINUX)
+#define PLAT_DLL_EXT "so"
+#elif defined(OSX)
+#define PLAT_DLL_EXT "dylib"
+#endif
+
+#if defined(_WIN32)
+#define PLAT_PATH_SLASH "\\"
+#elif defined(POSIX)
+#define PLAT_PATH_SLASH "/"
+#endif
+
+#if defined( _PS3 )
+#include <sysutil/sysutil_gamecontent.h>
+#define PATH_MAX CELL_GAME_PATH_MAX
+#endif
+
+#if (!defined(_WIN32) || defined(WINDED)) && defined(POSIX)
+#define MAX_PATH  PATH_MAX
+#define _MAX_PATH PATH_MAX
+#endif
+
+#ifdef _WIN32
+#ifndef MAX_PATH
+#define MAX_PATH 260
+#endif
+#define MAX_UNICODE_PATH 32767
+#else
+#define MAX_UNICODE_PATH MAX_PATH
+#endif
+
+#define MAX_UNICODE_PATH_IN_UTF8 (MAX_UNICODE_PATH * 4)
+
+// MSVC CRT uses 0x7fff while gcc uses MAX_INT, leading to mismatches between platforms
+// As a result, we pick the least common denominator here.  This should be used anywhere
+// you might typically want to use RAND_MAX
+#define VALVE_RAND_MAX 0x7fff
+
+#if !defined(DBL_EPSILON) && !defined(_WIN32)
+#define DBL_EPSILON 2.2204460492503131e-16
+#endif
+
+// need macro for constant expression
+#define ALIGN_VALUE_FLOOR( val, alignment ) ( ( val ) & ~( ( alignment ) - 1 ) )
+#define ALIGN_VALUE( val, alignment ) ALIGN_VALUE_FLOOR( ( val ) + ( ( alignment ) - 1 ), alignment )
+
+// Used to step into the debugger
+#ifdef _WIN64
+	#define DebuggerBreak()  __debugbreak()
+#elif defined(_WIN32)
+	#define DebuggerBreak()  __asm { int 3 }
+#elif defined( COMPILER_GCC )
+	#if defined( _PS3 )
+		#if defined( _CERT )
+			#define DebuggerBreak() ((void)0)
+		#else
+			#define DebuggerBreak() {  __asm volatile ("tw 31,1,1"); }
+		#endif
+	#elif defined(__i386__) || defined(__x86_64__)
+		#define DebuggerBreak()  __asm__ __volatile__ ( "int $3" );
+	#else
+		#define DebuggerBreak()
+	#endif
+#elif defined( COMPILER_SNC ) && defined( COMPILER_PS3 )
+	static volatile bool sPS3_SuppressAssertsInThisFile = false; // you can throw this in the debugger to temporarily disable asserts inside any particular .cpp module.
+	#define DebuggerBreak() if (!sPS3_SuppressAssertsInThisFile) __builtin_snpause(); // <sergiy> from SNC Migration Guide, tw 31,1,1
+#else
+	#define DebuggerBreak()  __asm__ __volatile__ ( "int $3" );
+#endif
+
+#if defined(_WIN64)
+
+extern "C"
+{
+   unsigned __int64 __rdtsc();
+}
+#pragma intrinsic(__rdtsc)
+#define PLAT_CPU_TIME() __rdtsc()
+
+#elif defined(_WIN32)
+
+FORCEINLINE unsigned __int64 PLAT_CPU_TIME()
+{
+    __asm rdtsc
+}
+
+#elif defined(COMPILER_GCC) && ( defined(__i386__) || defined(__x86_64__) )
+
+inline __attribute__ ((always_inline)) unsigned long long PLAT_CPU_TIME()
+{
+#ifdef PLATFORM_64BITS
+    unsigned long long Low, High;
+    __asm__ __volatile__ ( "rdtsc" : "=a" (Low), "=d" (High) );
+    return (High << 32) | Low;
+#else
+    unsigned long long Val;
+    __asm__ __volatile__ ( "rdtsc" : "=A" (Val) );
+    return Val;
+#endif
+}
+
+#elif defined(POSIX)
+
+#include <sys/time.h>
+
+FORCEINLINE unsigned long long PLAT_CPU_TIME()
+{
+	struct timeval  tv;
+	struct timezone tz;
+	gettimeofday(&tv, &tz);
+	return ((unsigned long long)tv.tv_sec)*1000000 + (unsigned long long)tv.tv_usec;
+}
+
+#endif
+
+//
+// GET_OUTER()
+//
+// A platform-independent way for a contained class to get a pointer to its
+// owner. If you know a class is exclusively used in the context of some
+// "outer" class, this is a much more space efficient way to get at the outer
+// class than having the inner class store a pointer to it.
+//
+//	class COuter
+//	{
+//		class CInner // Note: this does not need to be a nested class to work
+//		{
+//			void PrintAddressOfOuter()
+//			{
+//				printf( "Outer is at 0x%x\n", GET_OUTER( COuter, m_Inner ) );
+//			}
+//		};
+//
+//		CInner m_Inner;
+//		friend class CInner;
+//	};
+
+#define GET_OUTER( OuterType, OuterMember ) \
+   ( ( OuterType * ) ( (uint8 *)this - offsetof( OuterType, OuterMember ) ) )
+
+#define DISALLOW_COPY_CONSTRUCTORS(TypeName)	\
+	TypeName(const TypeName&);					\
+	void operator=(const TypeName&);
+
+// Using ARRAYSIZE implementation from winnt.h:
+#ifdef ARRAYSIZE
+#undef ARRAYSIZE
+#define ARRAYSIZE Dont_Use_ARRAYSIZE_Use_V_ARRAYSIZE
+#endif
+
+// Return the number of elements in a statically sized array.
+//   DWORD Buffer[100];
+//   RTL_NUMBER_OF(Buffer) == 100
+// This is also popularly known as: NUMBER_OF, ARRSIZE, _countof, NELEM, etc.
+//
+#define RTL_NUMBER_OF_V1(A) (sizeof(A)/sizeof((A)[0]))
+
+#if defined(__cplusplus) && \
+	!defined(MIDL_PASS) && \
+	!defined(RC_INVOKED) && \
+    !defined(SORTPP_PASS)
+
+#if _MSC_FULL_VER >= 13009466 || defined(__clang__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
+
+#ifdef __GNUC__
+#include <stddef.h>
+#endif
+
+// RtlpNumberOf is a function that takes a reference to an array of N Ts.
+//
+// typedef T array_of_T[N];
+// typedef array_of_T &reference_to_array_of_T;
+//
+// RtlpNumberOf returns a pointer to an array of N chars.
+// We could return a reference instead of a pointer but older compilers do not accept that.
+//
+// typedef char array_of_char[N];
+// typedef array_of_char *pointer_to_array_of_char;
+//
+// sizeof(array_of_char) == N
+// sizeof(*pointer_to_array_of_char) == N
+//
+// pointer_to_array_of_char RtlpNumberOf(reference_to_array_of_T);
+//
+// We never even call RtlpNumberOf, we just take the size of dereferencing its return type.
+// We do not even implement RtlpNumberOf, we just decare it.
+//
+// Attempts to pass pointers instead of arrays to this macro result in compile time errors.
+// That is the point.
+extern "C++" // templates cannot be declared to have 'C' linkage
+template <typename T, size_t N>
+char (*RtlpNumberOf( UNALIGNED T (&)[N] ))[N];
+
+#ifdef _PREFAST_
+// The +0 is so that we can go:
+// size = ARRAYSIZE(array) * sizeof(array[0]) without triggering a /analyze
+// warning about multiplying sizeof.
+#define RTL_NUMBER_OF_V2(A) (sizeof(*RtlpNumberOf(A))+0)
+#else
+#define RTL_NUMBER_OF_V2(A) (sizeof(*RtlpNumberOf(A)))
+#endif
+
+#elif defined(LINUX)
+
+// On Linux/gcc, RtlpNumberOf doesn't work well with pointers to structs
+// that are defined function locally. Here we have an alternative implementation
+// to detect if something is a pointer vs an array.
+
+// We can use sizeof( DetectIfIsPointer( p ) ) to detect if something is a
+// pointer rather than an array at compile time:
+// If sizeof(int) then it's an array
+// If sizeof(char) then it's a pointer
+// If sizeof(short) then it's a pointer or array to a non-templatizable type,
+// typically a type defined as function-local.
+// If it's neither a pointer or an array, it'll generate an error.
+template <typename T, unsigned int N>
+int DetectIfIsPointer( T (&)[N] );
+
+template <typename T>
+char DetectIfIsPointer( T* );
+
+short DetectIfIsPointer( const void* );
+
+// ErrorIfIsPointerNotArrayGivenToARRAYSIZE<b>::Value evaluates to 0 if b
+// is true, and generates a compile error otherwise.
+template<bool>
+struct ErrorIfIsPointerNotArrayGivenToARRAYSIZE
+{
+	enum { Value = 0 };
+};
+
+template<>
+struct ErrorIfIsPointerNotArrayGivenToARRAYSIZE<false>
+{
+};
+
+// Run a barrage of tests to see if this is a pointer rather than an array,
+// and fail with a compile error if it's a pointer. We test if it's
+// obviously a pointer. And if it's a non-templatizable type, we make sure
+// sizeof(A) == 0 or sizeof(A) >= sizeof(*A) -- a test any array should pass,
+// but very few pointers-to-structs will.
+#define RTL_NUMBER_OF_V2(A) \
+  ( ErrorIfIsPointerNotArrayGivenToARRAYSIZE< \
+         sizeof( DetectIfIsPointer( ( A ) ) ) == sizeof( int ) || \
+         ( sizeof( DetectIfIsPointer( ( A ) ) ) == sizeof( short ) && \
+         ( sizeof( A ) == 0 || sizeof( A ) >= sizeof( *A ) ) ) >::Value + \
+    RTL_NUMBER_OF_V1(A) )
+
+#endif // Compiler version
+#endif // C++
+
+#ifndef RTL_NUMBER_OF_V2
+#define RTL_NUMBER_OF_V2(A) RTL_NUMBER_OF_V1(A)
+#endif
+
+// ARRAYSIZE is more readable version of RTL_NUMBER_OF_V2
+// _ARRAYSIZE is a version useful for anonymous types
+#define V_ARRAYSIZE(A)    RTL_NUMBER_OF_V2(A)
+#define _ARRAYSIZE(A)   RTL_NUMBER_OF_V1(A)
+
+// A helper to prevent compiler warnings / errors for unused parameters and variables.
+// There are three versions in the code, but NOTE_UNUSED is the most
+// frequently used and should be used in new code.
+#ifndef NOTE_UNUSED
+#define NOTE_UNUSED(arg) ((void)arg)
+#endif
+
+// Don't define for Windows, since it is defined unconditionally in winnt.h.
+#if !defined( UNREFERENCED_PARAMETER ) && !defined( WIN32 )
+#define UNREFERENCED_PARAMETER(parm) NOTE_UNUSED(parm)
+#endif
+
+#ifndef REFERENCE
+#define REFERENCE(arg) NOTE_UNUSED(arg)
+#endif
+
+
+// #define COMPILETIME_MAX and COMPILETIME_MIN for max/min in constant expressions
+#define COMPILETIME_MIN( a, b ) ( ( ( a ) < ( b ) ) ? ( a ) : ( b ) )
+#define COMPILETIME_MAX( a, b ) ( ( ( a ) > ( b ) ) ? ( a ) : ( b ) )
+
+#endif // #ifndef MINBASE_MACROS_H

src/public/minbase/minbase_securezeromemory_impl.h

@@ -0,0 +1,28 @@
+//======== Copyright 2013, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Implementation of SecureZeroMemory for platforms that don't have one.
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+#ifndef SECUREZEROMEMORY_H
+#define SECUREZEROMEMORY_H
+#pragma once
+
+#if !defined(SecureZeroMemory)
+inline void SecureZeroMemory( void* pMemory, size_t nBytes )
+{
+	// The intent of this routine is to avoid being optimized away
+	// by a compiler that sees that the buffer is no longer used,
+	// so cast to volatile to indicate we want the accesses to occur.
+	volatile unsigned char *pMem = (volatile unsigned char *)pMemory;
+	while ( nBytes > 0 )
+	{
+		*pMem++ = 0;
+		nBytes--;
+	}
+}
+#endif
+
+#endif /* SECUREZEROMEMORY_H */

src/public/minbase/minbase_types.h

@@ -0,0 +1,87 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Portable type definitions.
+//
+//==========================================================================//
+
+#ifndef MINBASE_TYPES_H
+#define MINBASE_TYPES_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+typedef unsigned char    uint8;
+typedef signed char      int8;
+
+// for when we don't care about how many bits we use
+typedef unsigned int uint;
+
+typedef float  float32;
+typedef double float64;
+
+#if defined( _WIN32 )
+
+typedef __int16 int16;
+typedef unsigned __int16 uint16;
+typedef __int32 int32;
+typedef unsigned __int32 uint32;
+typedef __int64 int64;
+typedef unsigned __int64 uint64;
+
+typedef int socklen_t;
+
+#else // _WIN32
+
+typedef short int16;
+typedef unsigned short uint16;
+typedef int int32;
+typedef unsigned int uint32;
+// NOTE: We always use 'long long int' for 64-bit integers
+// even though that is not always the system definition.
+// For example, gcc 64-bit uses 'long int', which is a distinct
+// type even though it's also a 64-bit integer.
+// Always using 'long long int' makes life simpler for us because
+// 'll' number suffixes and format string directives always match
+// the number type, but be aware that our int64 may not always
+// be the same type as the system int64_t.  There are typedefs
+// below to handle that and ideally you should never have to think about it.
+typedef long long int int64;
+typedef unsigned long long int uint64;
+
+#endif // else _WIN32
+
+#ifdef PLATFORM_64BITS
+typedef int64 intp;
+typedef uint64 uintp;
+#else
+typedef int intp;
+typedef uint uintp;
+#endif
+
+// We include code that uses the stdint.h types so define
+// them also to make it easier to use such code without
+// actually including stdint.h (which can get messy because of
+// different MIN/MAX definitions).
+typedef int8 int8_t;
+typedef uint8 uint8_t;
+typedef int16 int16_t;
+typedef uint16 uint16_t;
+typedef int32 int32_t;
+typedef uint32 uint32_t;
+// NOTE: int64_t must match the compiler stdint.h definition
+// and so may not match the Steam int64.  Mixing the two is
+// error-prone so always use the Steam non-_t types in Steam code.
+#if defined(COMPILER_GCC) && defined(PLATFORM_64BITS) && !defined(OSX) && !(defined(IOS) || defined(TVOS))
+#define INT64_DIFFERENT_FROM_INT64_T 1
+typedef long int int64_t;
+typedef unsigned long int uint64_t;
+#else
+typedef int64 int64_t;
+typedef uint64 uint64_t;
+#endif
+
+#endif // #ifndef MINBASE_TYPES_H

src/public/minbase/minbase_warnings.h

@@ -0,0 +1,82 @@
+//====== Copyright 1996-2012, Valve Corporation, All rights reserved. ======//
+//
+// Enable and disable specific warnings.
+//
+//==========================================================================//
+
+#ifndef MINBASE_WARNINGS_H
+#define MINBASE_WARNINGS_H
+#pragma once
+
+// Identification is needed everywhere but we don't want to include
+// it over and over again so just make sure it was already included.
+#ifndef MINBASE_IDENTIFY_H
+#error Must include minbase_identify.h
+#endif
+
+#if defined( COMPILER_GCC )
+
+// disable warning: comparing floating point with == or != is unsafe [-Wfloat-equal] 
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+// disable warning: enumeration value 'kMouseRestoreNone' not handled in switch [-Wswitch]
+#pragma GCC diagnostic ignored "-Wswitch"
+// disable warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+
+#if __GNUC__ >= 4 && __GNUC_MINOR__ > 2
+// disable warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
+#pragma GCC diagnostic ignored "-Wignored-qualifiers"
+// disable warning: warning: comparison is always true due to limited range of data type [-Wtype-limits]
+#pragma GCC diagnostic ignored "-Wtype-limits"
+#endif
+
+#endif // #if defined( COMPILER_GCC )
+
+#if defined( COMPILER_SNC )
+
+#pragma diag_suppress=1700	   // warning 1700: class "%s" has virtual functions but non-virtual destructor
+#pragma diag_suppress=187	   // warning 187: pointless comparison of unsigned integer with zero
+
+#endif // #if defined( COMPILER_SNC )
+
+#if defined( COMPILER_MSVC32 )
+
+// Remove warnings from warning level 4.
+#pragma warning(disable : 4514) // warning C4514: 'acosl' : unreferenced inline function has been removed
+#pragma warning(disable : 4100) // warning C4100: 'hwnd' : unreferenced formal parameter
+#pragma warning(disable : 4127) // warning C4127: conditional expression is constant
+#pragma warning(disable : 4512) // warning C4512: 'InFileRIFF' : assignment operator could not be generated
+#pragma warning(disable : 4611) // warning C4611: interaction between '_setjmp' and C++ object destruction is non-portable
+#pragma warning(disable : 4710) // warning C4710: function 'x' not inlined
+#pragma warning(disable : 4505) // unreferenced local function has been removed
+#pragma warning(disable : 4239) // nonstandard extension used : 'argument' ( conversion from class Vector to class Vector& )
+#pragma warning(disable : 4097) // typedef-name 'BaseClass' used as synonym for class-name 'CFlexCycler::CBaseFlex'
+#pragma warning(disable : 4324) // Padding was added at the end of a structure
+#pragma warning(disable : 4244) // type conversion warning.
+#pragma warning(disable : 4786)	// Disable warnings about long symbol names
+#pragma warning(disable : 4250) // 'X' : inherits 'Y::Z' via dominance
+#pragma warning(disable : 4748) // warning C4748: /GS can not protect parameters and local variables from local buffer overrun because optimizations are disabled in function
+
+#if _MSC_VER >= 1300
+#pragma warning(disable : 4511)	// Disable warnings about private copy constructors
+#pragma warning(disable : 4121)	// warning C4121: 'symbol' : alignment of a member was sensitive to packing
+#pragma warning(disable : 4530)	// warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc (disabled due to std headers having exception syntax)
+#endif
+
+// When we port to 64 bit, we'll have to resolve the int, ptr vs size_t 32/64 bit problems...
+#if !defined( _WIN64 )
+#pragma warning( disable : 4267 )	// conversion from 'size_t' to 'int', possible loss of data
+#pragma warning( disable : 4311 )	// pointer truncation from 'char *' to 'int'
+#pragma warning( disable : 4312 )	// conversion from 'unsigned int' to 'memhandle_t' of greater size
+#endif
+
+#if _MSC_VER >= 1600 // VS 2010 and above.
+//-----------------------------------------------------------------------------
+// Upgrading important helpful warnings to errors
+//-----------------------------------------------------------------------------
+#pragma warning(error : 4789 ) // warning C4789: destination of memory copy is too small
+#endif // _MSC_VER >= 1600 // VS 2010 and above.
+
+#endif // #if defined( COMPILER_MSVC32 )
+
+#endif // #ifndef MINBASE_WARNINGS_H

src/public/steam/steamtypes.h

@@ -0,0 +1,181 @@
+//========= Copyright © 1996-2008, Valve LLC, All rights reserved. ============
+//
+// Purpose:
+//
+//=============================================================================
+
+#ifndef STEAMTYPES_H
+#define STEAMTYPES_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#define S_CALLTYPE __cdecl
+
+// Steam-specific types. Defined here so this header file can be included in other code bases.
+#ifndef WCHARTYPES_H
+typedef unsigned char uint8;
+#endif
+
+#if defined( __GNUC__ ) && !defined(POSIX)
+	#if __GNUC__ < 4
+		#error "Steamworks requires GCC 4.X (4.2 or 4.4 have been tested)"
+	#endif
+	#define POSIX 1
+#endif
+
+#if defined(__x86_64__) || defined(_WIN64) || defined(__aarch64__)
+#define X64BITS
+#endif
+
+// Make sure VALVE_BIG_ENDIAN gets set on PS3, may already be set previously in Valve internal code.
+#if !defined(VALVE_BIG_ENDIAN) && defined(_PS3)
+#define VALVE_BIG_ENDIAN
+#endif
+
+typedef unsigned char uint8;
+typedef signed char int8;
+
+#if defined( _WIN32 )
+
+typedef __int16 int16;
+typedef unsigned __int16 uint16;
+typedef __int32 int32;
+typedef unsigned __int32 uint32;
+typedef __int64 int64;
+typedef unsigned __int64 uint64;
+
+typedef int64 lint64;
+typedef uint64 ulint64;
+
+#ifdef X64BITS
+typedef __int64 intp;				// intp is an integer that can accomodate a pointer
+typedef unsigned __int64 uintp;		// (ie, sizeof(intp) >= sizeof(int) && sizeof(intp) >= sizeof(void *)
+#else
+typedef __int32 intp;
+typedef unsigned __int32 uintp;
+#endif
+
+#else // _WIN32
+
+typedef short int16;
+typedef unsigned short uint16;
+typedef int int32;
+typedef unsigned int uint32;
+typedef long long int64;
+typedef unsigned long long uint64;
+
+// [u]int64 are actually defined as 'long long' and gcc 64-bit
+// doesn't automatically consider them the same as 'long int'.
+// Changing the types for [u]int64 is complicated by
+// there being many definitions, so we just
+// define a 'long int' here and use it in places that would
+// otherwise confuse the compiler.
+typedef long int lint64;
+typedef unsigned long int ulint64;
+
+#ifdef X64BITS
+typedef long long intp;
+typedef unsigned long long uintp;
+#else
+typedef int intp;
+typedef unsigned int uintp;
+#endif
+
+#endif // else _WIN32
+
+#ifdef API_GEN
+# define CLANG_ATTR(ATTR) __attribute__((annotate( ATTR )))
+#else
+# define CLANG_ATTR(ATTR)
+#endif
+
+#define METHOD_DESC(DESC) CLANG_ATTR( "desc:" #DESC ";" )
+#define IGNOREATTR() CLANG_ATTR( "ignore" )
+#define OUT_STRUCT() CLANG_ATTR( "out_struct: ;" )
+#define OUT_STRING() CLANG_ATTR( "out_string: ;" )
+#define OUT_ARRAY_CALL(COUNTER,FUNCTION,PARAMS) CLANG_ATTR( "out_array_call:" #COUNTER "," #FUNCTION "," #PARAMS ";" )
+#define OUT_ARRAY_COUNT(COUNTER, DESC) CLANG_ATTR( "out_array_count:" #COUNTER  ";desc:" #DESC )
+#define ARRAY_COUNT(COUNTER) CLANG_ATTR( "array_count:" #COUNTER ";" )
+#define ARRAY_COUNT_D(COUNTER, DESC) CLANG_ATTR( "array_count:" #COUNTER ";desc:" #DESC )
+#define BUFFER_COUNT(COUNTER) CLANG_ATTR( "buffer_count:" #COUNTER ";" )
+#define OUT_BUFFER_COUNT(COUNTER) CLANG_ATTR( "out_buffer_count:" #COUNTER ";" )
+#define OUT_STRING_COUNT(COUNTER) CLANG_ATTR( "out_string_count:" #COUNTER ";" )
+#define DESC(DESC) CLANG_ATTR("desc:" #DESC ";")
+#define CALL_RESULT(RESULT_TYPE) CLANG_ATTR("callresult:" #RESULT_TYPE ";")
+#define CALL_BACK(RESULT_TYPE) CLANG_ATTR("callback:" #RESULT_TYPE ";")
+
+const int k_cubSaltSize   = 8;
+typedef	uint8 Salt_t[ k_cubSaltSize ];
+
+//-----------------------------------------------------------------------------
+// GID (GlobalID) stuff
+// This is a globally unique identifier.  It's guaranteed to be unique across all
+// racks and servers for as long as a given universe persists.
+//-----------------------------------------------------------------------------
+// NOTE: for GID parsing/rendering and other utils, see gid.h
+typedef uint64 GID_t;
+
+const GID_t k_GIDNil = 0xffffffffffffffffull;
+
+// For convenience, we define a number of types that are just new names for GIDs
+typedef uint64 JobID_t;			// Each Job has a unique ID
+typedef GID_t TxnID_t;			// Each financial transaction has a unique ID
+
+const GID_t k_TxnIDNil = k_GIDNil;
+const GID_t k_TxnIDUnknown = 0;
+
+const JobID_t k_JobIDNil = 0xffffffffffffffffull;
+
+// this is baked into client messages and interfaces as an int, 
+// make sure we never break this.
+typedef uint32 PackageId_t;
+const PackageId_t k_uPackageIdFreeSub = 0x0;
+const PackageId_t k_uPackageIdInvalid = 0xFFFFFFFF;
+
+typedef uint32 BundleId_t;
+const BundleId_t k_uBundleIdInvalid = 0;
+
+// this is baked into client messages and interfaces as an int, 
+// make sure we never break this.
+typedef uint32 AppId_t;
+const AppId_t k_uAppIdInvalid = 0x0;
+
+typedef uint64 AssetClassId_t;
+const AssetClassId_t k_ulAssetClassIdInvalid = 0x0;
+
+typedef uint32 PhysicalItemId_t;
+const PhysicalItemId_t k_uPhysicalItemIdInvalid = 0x0;
+
+
+// this is baked into client messages and interfaces as an int, 
+// make sure we never break this.  AppIds and DepotIDs also presently
+// share the same namespace, but since we'd like to change that in the future
+// I've defined it seperately here.
+typedef uint32 DepotId_t;
+const DepotId_t k_uDepotIdInvalid = 0x0;
+
+// RTime32
+// We use this 32 bit time representing real world time.
+// It offers 1 second resolution beginning on January 1, 1970 (Unix time)
+typedef uint32 RTime32;
+
+typedef uint32 CellID_t;
+const CellID_t k_uCellIDInvalid = 0xFFFFFFFF;
+
+// handle to a Steam API call
+typedef uint64 SteamAPICall_t;
+const SteamAPICall_t k_uAPICallInvalid = 0x0;
+
+typedef uint32 AccountID_t;
+
+typedef uint32 PartnerId_t;
+const PartnerId_t k_uPartnerIdInvalid = 0;
+
+// ID for a depot content manifest
+typedef uint64 ManifestId_t; 
+const ManifestId_t k_uManifestIdInvalid = 0;
+
+
+
+#endif // STEAMTYPES_H