- Added BEncode project as a submodule

- Added Crypto framework wrapper project so allow use in swift without Objective-C code
- Created TorrentMetaInfo class and implemented parsing of info dictionary

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "Submodules/BEncodeSwift"]
+	path = Submodules/BEncodeSwift
+	url = git@github.com:imben123/BEncodeSwift.git

BitTorrent.xcodeproj/project.pbxproj

@@ -7,6 +7,12 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		B54D0C1F1CA53993004343BD /* BEncode.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B54D0C1A1CA53983004343BD /* BEncode.framework */; };
+		B54D0C271CA56ADB004343BD /* TorrentMetaInfoTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B54D0C261CA56ADB004343BD /* TorrentMetaInfoTests.swift */; };
+		B54D0C761CA58993004343BD /* CommonCrypto.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B54D0C581CA58722004343BD /* CommonCrypto.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
+		B54D0C7A1CA69FAD004343BD /* TorrentMetaInfo.swift in Sources */ = {isa = PBXBuildFile; fileRef = B54D0C231CA56A22004343BD /* TorrentMetaInfo.swift */; };
+		B54D0C7B1CA69FD8004343BD /* NSData+sha1.swift in Sources */ = {isa = PBXBuildFile; fileRef = B54D0C2B1CA5787E004343BD /* NSData+sha1.swift */; };
+		B55D3FC21CA81372005CBDFF /* TestText.torrent in Resources */ = {isa = PBXBuildFile; fileRef = B55D3FC11CA81372005CBDFF /* TestText.torrent */; };
 		B56A8A071C83539300426AC8 /* TestHelpers.swift in Sources */ = {isa = PBXBuildFile; fileRef = B56A8A061C83539300426AC8 /* TestHelpers.swift */; };
 		B585AB781C3833450093FA41 /* BitTorrent.h in Headers */ = {isa = PBXBuildFile; fileRef = B585AB771C3833450093FA41 /* BitTorrent.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		B585AB7F1C3833450093FA41 /* BitTorrent.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B585AB741C3833450093FA41 /* BitTorrent.framework */; };
@@ -14,6 +20,34 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
+		B54D0C191CA53983004343BD /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = B54D0C141CA53983004343BD /* BEncode.xcodeproj */;
+			proxyType = 2;
+			remoteGlobalIDString = B54D0BDB1CA53299004343BD;
+			remoteInfo = BEncode;
+		};
+		B54D0C1B1CA53983004343BD /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = B54D0C141CA53983004343BD /* BEncode.xcodeproj */;
+			proxyType = 2;
+			remoteGlobalIDString = B54D0BE51CA5329A004343BD;
+			remoteInfo = BEncodeTests;
+		};
+		B54D0C1D1CA5398F004343BD /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = B54D0C141CA53983004343BD /* BEncode.xcodeproj */;
+			proxyType = 1;
+			remoteGlobalIDString = B54D0BDA1CA53299004343BD;
+			remoteInfo = BEncode;
+		};
+		B54D0C771CA589B4004343BD /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = B585AB6B1C3833450093FA41 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = B54D0C571CA58722004343BD;
+			remoteInfo = CommonCrypto;
+		};
 		B585AB801C3833450093FA41 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = B585AB6B1C3833450093FA41 /* Project object */;
@@ -24,6 +58,17 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		B54D0C141CA53983004343BD /* BEncode.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = BEncode.xcodeproj; path = Submodules/BEncodeSwift/BEncode.xcodeproj; sourceTree = "<group>"; };
+		B54D0C231CA56A22004343BD /* TorrentMetaInfo.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = TorrentMetaInfo.swift; path = Models/TorrentMetaInfo.swift; sourceTree = "<group>"; };
+		B54D0C261CA56ADB004343BD /* TorrentMetaInfoTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = TorrentMetaInfoTests.swift; path = Models/TorrentMetaInfoTests.swift; sourceTree = "<group>"; };
+		B54D0C2B1CA5787E004343BD /* NSData+sha1.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = "NSData+sha1.swift"; path = "Utilities/NSData+sha1.swift"; sourceTree = "<group>"; };
+		B54D0C581CA58722004343BD /* CommonCrypto.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = CommonCrypto.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		B54D0C6F1CA58749004343BD /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		B54D0C711CA58767004343BD /* CommonCrypto.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = CommonCrypto.xcconfig; sourceTree = "<group>"; };
+		B54D0C721CA5879E004343BD /* iphoneos.modulemap */ = {isa = PBXFileReference; lastKnownFileType = "sourcecode.module-map"; path = iphoneos.modulemap; sourceTree = "<group>"; };
+		B54D0C731CA587A9004343BD /* iphonesimulator.modulemap */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = "sourcecode.module-map"; path = iphonesimulator.modulemap; sourceTree = "<group>"; };
+		B54D0C741CA587B5004343BD /* macosx.modulemap */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = "sourcecode.module-map"; path = macosx.modulemap; sourceTree = "<group>"; };
+		B55D3FC11CA81372005CBDFF /* TestText.torrent */ = {isa = PBXFileReference; lastKnownFileType = file; path = TestText.torrent; sourceTree = "<group>"; };
 		B56A8A061C83539300426AC8 /* TestHelpers.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = TestHelpers.swift; path = Utilities/TestHelpers.swift; sourceTree = "<group>"; };
 		B585AB741C3833450093FA41 /* BitTorrent.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = BitTorrent.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		B585AB771C3833450093FA41 /* BitTorrent.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = BitTorrent.h; sourceTree = "<group>"; };
@@ -34,10 +79,19 @@
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		B54D0C541CA58722004343BD /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		B585AB701C3833450093FA41 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				B54D0C761CA58993004343BD /* CommonCrypto.framework in Frameworks */,
+				B54D0C1F1CA53993004343BD /* BEncode.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -52,11 +106,68 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		B54D0C131CA53979004343BD /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				B54D0C141CA53983004343BD /* BEncode.xcodeproj */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		B54D0C151CA53983004343BD /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				B54D0C1A1CA53983004343BD /* BEncode.framework */,
+				B54D0C1C1CA53983004343BD /* BEncodeTests.xctest */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		B54D0C211CA56619004343BD /* Torrents */ = {
+			isa = PBXGroup;
+			children = (
+				B55D3FC11CA81372005CBDFF /* TestText.torrent */,
+			);
+			name = Torrents;
+			sourceTree = "<group>";
+		};
+		B54D0C251CA56A25004343BD /* Models */ = {
+			isa = PBXGroup;
+			children = (
+				B54D0C231CA56A22004343BD /* TorrentMetaInfo.swift */,
+				B54D0C261CA56ADB004343BD /* TorrentMetaInfoTests.swift */,
+			);
+			name = Models;
+			sourceTree = "<group>";
+		};
+		B54D0C291CA5785F004343BD /* Utilities */ = {
+			isa = PBXGroup;
+			children = (
+				B54D0C2B1CA5787E004343BD /* NSData+sha1.swift */,
+			);
+			name = Utilities;
+			sourceTree = "<group>";
+		};
+		B54D0C591CA58722004343BD /* CommonCrypto */ = {
+			isa = PBXGroup;
+			children = (
+				B54D0C6F1CA58749004343BD /* Info.plist */,
+				B54D0C711CA58767004343BD /* CommonCrypto.xcconfig */,
+				B54D0C721CA5879E004343BD /* iphoneos.modulemap */,
+				B54D0C731CA587A9004343BD /* iphonesimulator.modulemap */,
+				B54D0C741CA587B5004343BD /* macosx.modulemap */,
+			);
+			path = CommonCrypto;
+			sourceTree = "<group>";
+		};
 		B585AB6A1C3833450093FA41 = {
 			isa = PBXGroup;
 			children = (
+				B54D0C211CA56619004343BD /* Torrents */,
 				B585AB761C3833450093FA41 /* BitTorrent */,
 				B585AB821C3833450093FA41 /* BitTorrentTests */,
+				B54D0C591CA58722004343BD /* CommonCrypto */,
+				B54D0C131CA53979004343BD /* Frameworks */,
 				B585AB751C3833450093FA41 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -66,6 +177,7 @@
 			children = (
 				B585AB741C3833450093FA41 /* BitTorrent.framework */,
 				B585AB7E1C3833450093FA41 /* BitTorrentTests.xctest */,
+				B54D0C581CA58722004343BD /* CommonCrypto.framework */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -75,6 +187,8 @@
 			children = (
 				B585AB771C3833450093FA41 /* BitTorrent.h */,
 				B585AB831C3833450093FA41 /* BitTorrentTests.swift */,
+				B54D0C251CA56A25004343BD /* Models */,
+				B54D0C291CA5785F004343BD /* Utilities */,
 				B585AB791C3833450093FA41 /* Info.plist */,
 			);
 			path = BitTorrent;
@@ -92,6 +206,13 @@
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
+		B54D0C551CA58722004343BD /* Headers */ = {
+			isa = PBXHeadersBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		B585AB711C3833450093FA41 /* Headers */ = {
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
@@ -103,6 +224,24 @@
 /* End PBXHeadersBuildPhase section */
 
 /* Begin PBXNativeTarget section */
+		B54D0C571CA58722004343BD /* CommonCrypto */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = B54D0C691CA58722004343BD /* Build configuration list for PBXNativeTarget "CommonCrypto" */;
+			buildPhases = (
+				B54D0C531CA58722004343BD /* Sources */,
+				B54D0C541CA58722004343BD /* Frameworks */,
+				B54D0C551CA58722004343BD /* Headers */,
+				B54D0C561CA58722004343BD /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = CommonCrypto;
+			productName = CommonCrypto;
+			productReference = B54D0C581CA58722004343BD /* CommonCrypto.framework */;
+			productType = "com.apple.product-type.framework";
+		};
 		B585AB731C3833450093FA41 /* BitTorrent */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = B585AB881C3833450093FA41 /* Build configuration list for PBXNativeTarget "BitTorrent" */;
@@ -115,6 +254,8 @@
 			buildRules = (
 			);
 			dependencies = (
+				B54D0C781CA589B4004343BD /* PBXTargetDependency */,
+				B54D0C1E1CA5398F004343BD /* PBXTargetDependency */,
 			);
 			name = BitTorrent;
 			productName = BitTorrent;
@@ -146,10 +287,13 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftMigration = 0720;
-				LastSwiftUpdateCheck = 0720;
+				LastSwiftUpdateCheck = 0730;
 				LastUpgradeCheck = 0720;
 				ORGANIZATIONNAME = "Ben Davis";
 				TargetAttributes = {
+					B54D0C571CA58722004343BD = {
+						CreatedOnToolsVersion = 7.3;
+					};
 					B585AB731C3833450093FA41 = {
 						CreatedOnToolsVersion = 7.2;
 					};
@@ -168,15 +312,46 @@
 			mainGroup = B585AB6A1C3833450093FA41;
 			productRefGroup = B585AB751C3833450093FA41 /* Products */;
 			projectDirPath = "";
+			projectReferences = (
+				{
+					ProductGroup = B54D0C151CA53983004343BD /* Products */;
+					ProjectRef = B54D0C141CA53983004343BD /* BEncode.xcodeproj */;
+				},
+			);
 			projectRoot = "";
 			targets = (
 				B585AB731C3833450093FA41 /* BitTorrent */,
 				B585AB7D1C3833450093FA41 /* BitTorrentTests */,
+				B54D0C571CA58722004343BD /* CommonCrypto */,
 			);
 		};
 /* End PBXProject section */
 
+/* Begin PBXReferenceProxy section */
+		B54D0C1A1CA53983004343BD /* BEncode.framework */ = {
+			isa = PBXReferenceProxy;
+			fileType = wrapper.framework;
+			path = BEncode.framework;
+			remoteRef = B54D0C191CA53983004343BD /* PBXContainerItemProxy */;
+			sourceTree = BUILT_PRODUCTS_DIR;
+		};
+		B54D0C1C1CA53983004343BD /* BEncodeTests.xctest */ = {
+			isa = PBXReferenceProxy;
+			fileType = wrapper.cfbundle;
+			path = BEncodeTests.xctest;
+			remoteRef = B54D0C1B1CA53983004343BD /* PBXContainerItemProxy */;
+			sourceTree = BUILT_PRODUCTS_DIR;
+		};
+/* End PBXReferenceProxy section */
+
 /* Begin PBXResourcesBuildPhase section */
+		B54D0C561CA58722004343BD /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		B585AB721C3833450093FA41 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -188,16 +363,26 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				B55D3FC21CA81372005CBDFF /* TestText.torrent in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
+		B54D0C531CA58722004343BD /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		B585AB6F1C3833450093FA41 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				B54D0C7A1CA69FAD004343BD /* TorrentMetaInfo.swift in Sources */,
+				B54D0C7B1CA69FD8004343BD /* NSData+sha1.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -207,12 +392,23 @@
 			files = (
 				B56A8A071C83539300426AC8 /* TestHelpers.swift in Sources */,
 				B585AB841C3833450093FA41 /* BitTorrentTests.swift in Sources */,
+				B54D0C271CA56ADB004343BD /* TorrentMetaInfoTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		B54D0C1E1CA5398F004343BD /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			name = BEncode;
+			targetProxy = B54D0C1D1CA5398F004343BD /* PBXContainerItemProxy */;
+		};
+		B54D0C781CA589B4004343BD /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = B54D0C571CA58722004343BD /* CommonCrypto */;
+			targetProxy = B54D0C771CA589B4004343BD /* PBXContainerItemProxy */;
+		};
 		B585AB811C3833450093FA41 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = B585AB731C3833450093FA41 /* BitTorrent */;
@@ -221,6 +417,44 @@
 /* End PBXTargetDependency section */
 
 /* Begin XCBuildConfiguration section */
+		B54D0C6A1CA58722004343BD /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = B54D0C711CA58767004343BD /* CommonCrypto.xcconfig */;
+			buildSettings = {
+				CLANG_ANALYZER_NONNULL = YES;
+				DEFINES_MODULE = YES;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = CommonCrypto/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = uk.co.bendavisapps.CommonCrypto;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+			};
+			name = Debug;
+		};
+		B54D0C6B1CA58722004343BD /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = B54D0C711CA58767004343BD /* CommonCrypto.xcconfig */;
+			buildSettings = {
+				CLANG_ANALYZER_NONNULL = YES;
+				DEFINES_MODULE = YES;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = CommonCrypto/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = uk.co.bendavisapps.CommonCrypto;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+			};
+			name = Release;
+		};
 		B585AB861C3833450093FA41 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
@@ -313,6 +547,7 @@
 		B585AB891C3833450093FA41 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES = NO;
 				CLANG_ENABLE_MODULES = YES;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -320,10 +555,12 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = BitTorrent/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = bendavis.BitTorrent;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 			};
 			name = Debug;
@@ -331,6 +568,7 @@
 		B585AB8A1C3833450093FA41 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES = NO;
 				CLANG_ENABLE_MODULES = YES;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -338,10 +576,12 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = BitTorrent/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = bendavis.BitTorrent;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "";
 			};
 			name = Release;
 		};
@@ -349,9 +589,11 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				INFOPLIST_FILE = BitTorrentTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = bendavis.BitTorrentTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "";
 			};
 			name = Debug;
 		};
@@ -359,15 +601,26 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				INFOPLIST_FILE = BitTorrentTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = bendavis.BitTorrentTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "";
 			};
 			name = Release;
 		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		B54D0C691CA58722004343BD /* Build configuration list for PBXNativeTarget "CommonCrypto" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				B54D0C6A1CA58722004343BD /* Debug */,
+				B54D0C6B1CA58722004343BD /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		B585AB6E1C3833450093FA41 /* Build configuration list for PBXProject "BitTorrent" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (

BitTorrent/BitTorrent.h

@@ -15,5 +15,3 @@ FOUNDATION_EXPORT double BitTorrentVersionNumber;
 FOUNDATION_EXPORT const unsigned char BitTorrentVersionString[];
 
 // In this header, you should import all the public headers of your framework using statements like #import <BitTorrent/PublicHeader.h>
-
-

BitTorrent/Models/TorrentMetaInfo.swift

@@ -0,0 +1,170 @@
+//
+//  TorrentMetaInfo.swift
+//  BitTorrent
+//
+//  Created by Ben Davis on 25/03/2016.
+//  Copyright © 2016 Ben Davis. All rights reserved.
+//
+
+import Foundation
+import class BEncode.BEncoder
+
+class TorrentMetaInfo {
+    
+    var infoHash : NSData // this is the original bencoded dictionary, hashed
+
+    var info: TorrentInfoDictionary
+//    var announce: String
+//    var announceList: [String]?
+//    var creationDate: NSDate?
+//    var comment: String?
+//    var createdBy: String?
+
+    init?(data: NSData) {
+        print(try! BEncoder.decodeDictionaryKeysOnly(data)["info"]!)
+        self.infoHash = try! BEncoder.decodeDictionaryKeysOnly(data)["info"]!.sha1()
+        let decodedMetainfo = try! BEncoder.decodeStringKeyedDictionary(data)
+        if let info = TorrentInfoDictionary(decodedMetainfo["info"] as! [String : AnyObject]) {
+            self.info = info
+        } else {
+            return nil
+        }
+    }
+    
+}
+
+class TorrentInfoDictionary {
+    
+    let name : String
+    let pieceLength : Int
+    let isPrivate : Bool
+    let files: [TorrentFileInfo]
+    let pieces : [NSData]?
+    let length: Int
+
+    init?(_ dictionary: [String : AnyObject]) {
+        
+        if let nameData = dictionary["name"] as? NSData, name = String(asciiData: nameData) {
+            self.name = name
+        } else {
+            return nil
+        }
+        
+        if let pieceLength = dictionary["piece length"] as? Int {
+            self.pieceLength = pieceLength
+        } else {
+            return nil
+        }
+        
+        if let pieces = dictionary["pieces"] as? NSData, piecesArray = TorrentInfoDictionary.seperatePieces(pieces) {
+            self.pieces = piecesArray
+        } else {
+            return nil
+        }
+        
+        if let tuple = TorrentInfoDictionary.parseFilesAndLengthFromDictionary(dictionary, parsedName: name) {
+            self.files = tuple.files
+            self.length = tuple.totalLength
+        } else {
+            return nil
+        }
+        
+        if let isPrivate = dictionary["private"] as? Int {
+            self.isPrivate = (isPrivate == 1)
+        } else {
+            self.isPrivate = false
+        }
+        
+    }
+    
+    private class func parseFilesAndLengthFromDictionary(dictionary: [ String : AnyObject ], parsedName name: String)
+        -> (files: [TorrentFileInfo], totalLength: Int)? {
+            
+            if let files = dictionary["files"] as? [ [ String : AnyObject ] ] {
+                
+                if let tuple = TorrentInfoDictionary.parseFilesDictionaries(files) {
+                    return tuple
+                } else {
+                    return nil
+                }
+                
+            } else if let length = dictionary["length"] as? Int {
+                
+                let md5sumData = dictionary["md5sum"] as? NSData
+                let md5sum = String(asciiData: md5sumData)
+                let files = [ TorrentFileInfo(path: name, length: length, md5sum: md5sum) ]
+                
+                return (files, length)
+                
+            } else {
+                
+                return nil
+                
+            }
+    }
+    
+    private class func parseFilesDictionaries(files: [ [ String : AnyObject ] ])
+        -> (files: [TorrentFileInfo], totalLength: Int)? {
+            
+            var totalLength = 0
+            var result: [TorrentFileInfo] = []
+            
+            for fileDictionary in files {
+                
+                if let file = TorrentFileInfo(dictionary: fileDictionary) {
+                    
+                    totalLength += file.length
+                    result.append(file)
+                    
+                } else {
+                    return nil
+                }
+                
+            }
+            
+            return (files: result, totalLength: totalLength)
+    }
+    
+    private class func seperatePieces(pieces: NSData) -> [NSData]? {
+        if pieces.length % 20 != 0 {
+            return nil
+        }
+        
+        var result: [NSData] = []
+        for index in 0.stride(to:pieces.length, by: 20) {
+            result.append(pieces.subdataWithRange(NSMakeRange(index, 20)))
+        }
+        return result
+    }
+}
+
+class TorrentFileInfo {
+    let path: String
+    let length: Int
+    let md5sum: String?
+
+    init(path: String, length: Int, md5sum: String?) {
+        self.path = path
+        self.length = length
+        self.md5sum = md5sum
+    }
+    
+    convenience init?(dictionary: [ String : AnyObject ]) {
+        
+        let pathData = dictionary["path"] as? NSData
+        let path = String(asciiData: pathData)
+        
+        let length = dictionary["length"] as? Int
+        
+        if let length = length, path = path {
+            
+            let md5sumData = dictionary["md5sum"] as? NSData
+            let md5sum = String(asciiData: md5sumData)
+            
+            self.init(path: path, length: length, md5sum: md5sum)
+            
+        } else {
+            return nil
+        }
+    }
+}

BitTorrent/Models/TorrentMetaInfoTests.swift

@@ -0,0 +1,286 @@
+//
+//  TorrentMetaInfoTests.swift
+//  BitTorrent
+//
+//  Created by Ben Davis on 25/03/2016.
+//  Copyright © 2016 Ben Davis. All rights reserved.
+//
+
+import XCTest
+@testable import BitTorrent
+import BEncode
+
+class TorrentMetaInfoTests: XCTestCase {
+
+    let filePieceLength = 16384
+    let singleFilePiece = NSData(byteArray: [0x3f, 0x3f, 0x11, 0x09, 0x64, 0x07, 0x00, 0x3f, 0x42,
+        0x35, 0x3f, 0x3f, 0x59, 0x2e, 0x23, 0x13, 0x3f, 0x18, 0x23, 0x3e])
+    let torrentName = "Torrent Name"
+    let singleFileName = "test.txt"
+    let singleFileLength = 117
+    let singleFileMD5 = "c23d5ddec291bf9e27cb84657144388dc352472ca89709bbda80e680c82470e1"
+    let multipleFile1MD5 = "d8e624fda84296ba9e5af415faa5c2aa68960ce0578116a8507340438893bd85"
+    let multipleFile2MD5 = "e2ddfed708ea34db57b4a1ef7691776db5e24dff813706e4c695a6668f8fbabf"
+    let multipleFileLength1 = 116
+    let multipleFileLength2 = 115
+    let multipleFilePath1 = "/test/path"
+    let multipleFilePath2 = "/test/path2"
+    
+    override func setUp() {
+        super.setUp()
+    }
+    
+    override func tearDown() {
+        super.tearDown()
+    }
+    
+    // MARK: - Create some example dictionaries
+    
+    func singleFileInfoDictionary() -> [String:AnyObject] {
+        return [
+            "piece length" : filePieceLength,
+            "pieces" : createMultiplePieces(),
+            "name" : singleFileName,
+            "length" : singleFileLength,
+        ]
+    }
+    
+    func createMultiplePieces() -> NSData {
+        return NSMutableData(data: singleFilePiece).andData(singleFilePiece)
+    }
+    
+    func multiFileInfoDictionary() -> [String:AnyObject] {
+        return multiFileInfoDictionary([
+            testFileDictionary(multipleFileLength1, path: multipleFilePath1, md5sum: multipleFile1MD5),
+            testFileDictionary(multipleFileLength2, path: multipleFilePath2, md5sum: multipleFile2MD5),
+            ])
+    }
+    
+    func multiFileInfoDictionary(files: [ [ String : AnyObject ] ]) -> [String:AnyObject] {
+        return [
+            "piece length" : filePieceLength,
+            "pieces" : createMultiplePieces(),
+            "name" : torrentName,
+            "files" : files,
+        ]
+    }
+    
+    func testFileDictionary(length: Int, path: String, md5sum: String?) -> [ String : AnyObject ] {
+        var result: [ String : AnyObject ] = [
+            "length" : length,
+            "path" : path,
+        ]
+        if let md5sum = md5sum {
+            result.updateValue(md5sum, forKey:"md5sum")
+        }
+        return result
+    }
+    
+    func exampleMetaInfoDictionary() -> NSData {
+        return self.metaInfoDictionaryWithInfoDictionary(singleFileInfoDictionary())
+    }
+    
+    func metaInfoDictionaryWithInfoDictionary(infoDictionary: [String : AnyObject]) -> NSData {
+        return try! BEncode.BEncoder.encode( [ "info" : infoDictionary ] )
+    }
+    
+    // MARK: -
+
+    func testCanInitialiseWithDictionary() {
+        let metaInfo = TorrentMetaInfo(data: self.exampleMetaInfoDictionary())!
+        let _ = metaInfo.infoHash
+        let _ = metaInfo.info
+    }
+    
+    func testInfoDictionarySplitsPiecesInto20ByteChecksums() {
+        let metaInfo = TorrentMetaInfo(data: self.exampleMetaInfoDictionary())!
+        let info = metaInfo.info
+        XCTAssertEqual(info.pieces![0], singleFilePiece)
+        XCTAssertEqual(info.pieces![1], singleFilePiece)
+    }
+    
+    func testProducesCorrectInfoHash() {
+        let path = NSBundle(forClass: self.dynamicType).pathForResource("TestText", ofType: "torrent")
+        let data = NSData(contentsOfFile: path!)!
+        let metaInfo = TorrentMetaInfo(data: data)!
+
+        let hash = NSData(byteArray:[ 0xf0, 0xb8, 0x71, 0x98, 0x99, 0x53, 0x97, 0x3f, 0xbf, 0xa9, 0x4d,
+            0xc8, 0x14, 0x98, 0xee, 0x8d, 0x20, 0x5b, 0xb2, 0x23])
+        
+        XCTAssertEqual(hash, metaInfo.infoHash)
+    }
+
+    // MARK: - Test info dictionary
+    
+    func testProducesCorrectCommonInfoDictionaryProperties() {
+        let metaInfo = TorrentMetaInfo(data: self.exampleMetaInfoDictionary())!
+        let info = metaInfo.info
+        
+        XCTAssertEqual(info.name, singleFileName)
+        
+        XCTAssertEqual(info.pieceLength, filePieceLength)
+        
+        let piecesConcatenated = info.pieces!.reduce(NSMutableData()) {
+            (result: NSMutableData, item: NSData) in
+            return result.andData(item)
+        }
+        XCTAssertEqual(piecesConcatenated, createMultiplePieces())
+    }
+    
+    func testIsPrivateIffPrivateKeyIsPresentAnd1() {
+        var infoDictionary = singleFileInfoDictionary()
+        
+        infoDictionary.updateValue(1, forKey: "private")
+        var metainfo = TorrentMetaInfo(data: metaInfoDictionaryWithInfoDictionary(infoDictionary))!
+        XCTAssertTrue(metainfo.info.isPrivate)
+        
+        infoDictionary.updateValue(0, forKey: "private")
+        metainfo = TorrentMetaInfo(data: metaInfoDictionaryWithInfoDictionary(infoDictionary))!
+        XCTAssertFalse(metainfo.info.isPrivate)
+        
+        infoDictionary.removeValueForKey("private")
+        metainfo = TorrentMetaInfo(data: metaInfoDictionaryWithInfoDictionary(infoDictionary))!
+        XCTAssertFalse(metainfo.info.isPrivate)
+    }
+    
+    // MARK: Single file info dictionary
+    
+    func testInfoDictionaryForSingleFileTorrent() {
+        let metaInfo = TorrentMetaInfo(data: self.exampleMetaInfoDictionary())!
+        let info = metaInfo.info
+
+        XCTAssertEqual(info.length, singleFileLength)
+        
+        XCTAssertEqual(info.files.count, 1)
+        
+        let file = info.files[0]
+        XCTAssertEqual(file.length, singleFileLength)
+        XCTAssertEqual(file.path, singleFileName)
+
+    }
+    
+    func testInfoDictionaryContainsMD5ChecksumIfPresentInSingleFile() {
+        var infoDictionary = singleFileInfoDictionary()
+
+        var metaInfo = TorrentMetaInfo(data: metaInfoDictionaryWithInfoDictionary(infoDictionary))!
+        var file = metaInfo.info.files[0]
+        XCTAssertNil(file.md5sum)
+        
+        
+        infoDictionary.updateValue(singleFileMD5, forKey: "md5sum")
+        metaInfo = TorrentMetaInfo(data: metaInfoDictionaryWithInfoDictionary(infoDictionary))!
+        file = metaInfo.info.files[0]
+
+        XCTAssertEqual(file.md5sum, singleFileMD5)
+
+    }
+    
+    func testInitializerReturnsNilOnInvalidInfoDictionaryForSingleFile() {
+        
+        var infoDictionary = singleFileInfoDictionary()
+        infoDictionary.removeValueForKey("name")
+        var metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+        
+        infoDictionary = singleFileInfoDictionary()
+        infoDictionary.removeValueForKey("piece length")
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+        
+        infoDictionary = singleFileInfoDictionary()
+        infoDictionary.removeValueForKey("pieces")
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+        
+        infoDictionary = singleFileInfoDictionary()
+        infoDictionary.updateValue(NSData(byteArray: [1,2,3]), forKey: "pieces")
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+        
+        infoDictionary = singleFileInfoDictionary()
+        infoDictionary.updateValue(NSMutableData(length: 21)!, forKey: "pieces")
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+    }
+    
+    // MARK: Multiple file info dictionary
+
+    func testInfoDictionaryForMultipleFileTorrent() {
+        let infoDictionary = multiFileInfoDictionary()
+        let metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        let metaInfo = TorrentMetaInfo(data: metaInfoDictionary)!
+        let info = metaInfo.info
+        
+        XCTAssertEqual(info.length, multipleFileLength1 + multipleFileLength2)
+        
+        XCTAssertEqual(info.files.count, 2)
+        
+        let file1 = info.files[0]
+        XCTAssertEqual(file1.length, multipleFileLength1)
+        XCTAssertEqual(file1.path, multipleFilePath1)
+        
+        let file2 = info.files[1]
+        XCTAssertEqual(file2.length, multipleFileLength2)
+        XCTAssertEqual(file2.path, multipleFilePath2)
+        
+    }
+    
+    func testInfoDictionaryContainsMD5ChecksumIfPresentInMultipleFiles() {
+        
+        var infoDictionary = multiFileInfoDictionary()
+        var metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        var metaInfo = TorrentMetaInfo(data: metaInfoDictionary)!
+        var file1 = metaInfo.info.files[0]
+        var file2 = metaInfo.info.files[1]
+        
+        XCTAssertEqual(file1.md5sum, multipleFile1MD5)
+        XCTAssertEqual(file2.md5sum, multipleFile2MD5)
+        
+        
+        infoDictionary.updateValue(multipleFile1MD5, forKey: "md5sum")
+        
+        infoDictionary = multiFileInfoDictionary([
+            [ "length" : multipleFileLength1, "path" : multipleFilePath1 ],
+            [ "length" : multipleFileLength2, "path" : multipleFilePath2 ],
+            ])
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        metaInfo = TorrentMetaInfo(data: metaInfoDictionary)!
+        file1 = metaInfo.info.files[0]
+        file2 = metaInfo.info.files[1]
+        
+        XCTAssertNil(file1.md5sum)
+        XCTAssertNil(file2.md5sum)
+        
+        
+    }
+    
+    func testInitializerReturnsNilOnInvalidInfoDictionaryForMultipleFiles() {
+        
+        var infoDictionary = multiFileInfoDictionary()
+        infoDictionary.removeValueForKey("files")
+        var metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+        
+        infoDictionary = multiFileInfoDictionary([
+            [ "length" : multipleFileLength1, "path" : multipleFilePath1 ],
+            [ "length" : multipleFileLength2 ],
+            ])
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+        
+        infoDictionary = multiFileInfoDictionary([
+            [ "length" : multipleFileLength1, "path" : multipleFilePath1 ],
+            [ "path" : multipleFilePath2 ],
+            ])
+        metaInfoDictionary = metaInfoDictionaryWithInfoDictionary(infoDictionary)
+        XCTAssertNil(TorrentMetaInfo(data: metaInfoDictionary))
+
+    }
+    
+    
+}

BitTorrent/Utilities/NSData+sha1.swift

@@ -0,0 +1,22 @@
+//
+//  NSData+sha1.swift
+//  BitTorrent
+//
+//  Created by Ben Davis on 25/03/2016.
+//  Copyright © 2016 Ben Davis. All rights reserved.
+//
+
+import Foundation
+import CommonCrypto
+
+extension NSData {
+    
+    func sha1() -> NSData {
+        let outputLength = Int(CC_SHA1_DIGEST_LENGTH)
+        var digest = [UInt8](count:Int(CC_SHA1_DIGEST_LENGTH), repeatedValue: 0)
+        CC_SHA1(self.bytes, CC_LONG(self.length), &digest)
+        let bytesPointer = UnsafePointer<Void>(digest)
+        return NSData(bytes: bytesPointer, length: outputLength)
+    }
+    
+}

CommonCrypto/CommonCrypto.xcconfig

@@ -0,0 +1,11 @@
+//
+//  CommonCrypto.xcconfig
+//  BitTorrent
+//
+//  Created by Ben Davis on 25/03/2016.
+//  Copyright © 2016 Ben Davis. All rights reserved.
+//
+
+MODULEMAP_FILE[sdk=iphoneos*]        = $(SRCROOT)/CommonCrypto/iphoneos.modulemap
+MODULEMAP_FILE[sdk=iphonesimulator*] = $(SRCROOT)/CommonCrypto/iphonesimulator.modulemap
+MODULEMAP_FILE[sdk=macosx*]          = $(SRCROOT)/CommonCrypto/macosx.modulemap

CommonCrypto/Info.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

CommonCrypto/iphoneos.modulemap

@@ -0,0 +1,4 @@
+module CommonCrypto [system] {
+    header "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/CommonCrypto/CommonCrypto.h"
+    export *
+}

CommonCrypto/iphonesimulator.modulemap

@@ -0,0 +1,4 @@
+module CommonCrypto [system] {
+    header "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/CommonCrypto/CommonCrypto.h"
+    export *
+}

CommonCrypto/macosx.modulemap

@@ -0,0 +1,4 @@
+module CommonCrypto [system] {
+    header "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/CommonCrypto/CommonCrypto.h"
+    export *
+}