Problem - Kevin Tafuro

#include
#include
static LPSTR Crypt64Encode(BYTE *pBuffer) {
int i;
DWORD dwTemp;
LPSTR lpszOut, lpszPtr;
static LPSTR lpszCrypt64Set = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwyxz";
if (!(lpszOut = lpszPtr = (char *)LocalAlloc(LMEM_FIXED, 23))) return 0;
#define CRYPT64_ENCODE(x, y, z) \
for (i = 0, dwTemp = (pBuffer[(x)] = 6) \
*lpszPtr++ = lpszCrypt64Set[dwTemp & 0x3F]
CRYPT64_ENCODE(0, 6, 12); CRYPT64_ENCODE(1, 7, 13);
CRYPT64_ENCODE(2, 8, 14); CRYPT64_ENCODE(3, 9, 15);
CRYPT64_ENCODE(4, 10, 5);
for (i = 0, dwTemp = pBuffer[11]; i++ < 2; dwTemp >>= 6)
*lpszPtr++ = lpszCrypt64Set[dwTemp & 0x3F];
*lpszPtr = 0;
#undef CRYPT64_ENCODE
return lpszOut;
}
static BOOL ComputeHash(BYTE *pbHash, LPCSTR lpszKey, LPCSTR lpszSalt,
DWORD dwSaltLength) {
int i, length;
DWORD cbHash, dwKeyLength;
HCRYPTHASH hHash, hHash1;
HCRYPTPROV hProvider;
dwKeyLength = lstrlenA(lpszKey);
if (!CryptAcquireContext(&hProvider, 0, MS_DEF_PROV, 0, CRYPT_VERIFYCONTEXT))
return FALSE;
if (!CryptCreateHash(hProvider, CALG_MD5, 0, 0, &hHash)) {
CryptReleaseContext(hProvider, 0);
return FALSE;
}
CryptHashData(hHash, (BYTE *)lpszKey, dwKeyLength, 0);
CryptHashData(hHash, (BYTE *)lpszSalt, dwSaltLength, 0);
if (!CryptCreateHash(hProvider, CALG_MD5, 0, 0, &hHash1)) {
CryptDestroyHash(hHash);
CryptReleaseContext(hProvider, 0);
return FALSE;
}
CryptHashData(hHash1, lpszKey, dwKeyLength, 0);
CryptHashData(hHash1, lpszSalt, dwSaltLength, 0);
406 | Chapter 8: Authentication and Key Exchange
This is the Title of the Book, eMatter Edition
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