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Reorder codec.cpp

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This commit is contained in:
Anders Jenbo
2020-11-02 01:12:28 +01:00
parent 064173fef1
commit f0c80d87f1
2 changed files with 36 additions and 37 deletions
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Source/codec.cpp
+36 -36
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@@ -14,6 +14,42 @@ typedef struct CodecSignature {
#define BLOCKSIZE 64
static void codec_init_key(int unused, char *pszPassword)
{
int i, ch, n;
char key[136]; // last 64 bytes are the SHA1
char pw[64];
char digest[SHA1HashSize];
char *keyInit;
srand(0x7058);
keyInit = key;
for (i = 0; i < sizeof(key); i++) {
*keyInit = rand();
keyInit++;
}
ch = 0;
for (i = 0; i < 64; i++) {
if (!pszPassword[ch])
ch = 0;
pw[i] = pszPassword[ch];
ch++;
}
SHA1Reset(0);
SHA1Calculate(0, pw, digest);
SHA1Clear();
for (i = 0; i < sizeof(key); i++)
key[i] ^= digest[i % SHA1HashSize];
memset(pw, 0, sizeof(pw));
memset(digest, 0, sizeof(digest));
for (n = 0; n < 3; n++) {
SHA1Reset(n);
SHA1Calculate(n, &key[72], NULL);
}
memset(key, 0, sizeof(key));
}
int codec_decode(BYTE *pbSrcDst, DWORD size, char *pszPassword)
{
char buf[128];
@@ -58,42 +94,6 @@ error:
return 0;
}
void codec_init_key(int unused, char *pszPassword)
{
int i, ch, n;
char key[136]; // last 64 bytes are the SHA1
char pw[64];
char digest[SHA1HashSize];
char *keyInit;
srand(0x7058);
keyInit = key;
for (i = 0; i < sizeof(key); i++) {
*keyInit = rand();
keyInit++;
}
ch = 0;
for (i = 0; i < 64; i++) {
if (!pszPassword[ch])
ch = 0;
pw[i] = pszPassword[ch];
ch++;
}
SHA1Reset(0);
SHA1Calculate(0, pw, digest);
SHA1Clear();
for (i = 0; i < sizeof(key); i++)
key[i] ^= digest[i % SHA1HashSize];
memset(pw, 0, sizeof(pw));
memset(digest, 0, sizeof(digest));
for (n = 0; n < 3; n++) {
SHA1Reset(n);
SHA1Calculate(n, &key[72], NULL);
}
memset(key, 0, sizeof(key));
}
DWORD codec_get_encoded_len(DWORD dwSrcBytes)
{
if (dwSrcBytes % BLOCKSIZE != 0)