1 #include <windows.h>
2 #include <wincrypt.h>
3 #include <stdio.h>
4
5 BOOL GetFileHash(LPCSTR lpFileName, LPSTR lpHash)
6 {
7 BOOL bResult = FALSE;
8
9 HANDLE hFile = CreateFile(lpFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
10
11 if (hFile != INVALID_HANDLE_VALUE)
12 {
13 DWORD dwFileSize = GetFileSize(hFile, NULL);
14
15 if (dwFileSize > 0)
16 {
17 PBYTE lpBuffer = (PBYTE)VirtualAlloc(NULL, dwFileSize, MEM_COMMIT, PAGE_READWRITE);
18
19 if (lpBuffer != NULL)
20 {
21 DWORD dwNumOfRead;
22
23 if (ReadFile(hFile, lpBuffer, dwFileSize, &dwNumOfRead, NULL) != FALSE)
24 {
25 HCRYPTPROV hProv;
26
27 if (CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT) != FALSE)
28 {
29 HCRYPTHASH hHash;
30
31 if (CryptCreateHash(hProv, CALG_MD5, NULL, NULL, &hHash) != FALSE)
32 {
33 if (CryptHashData(hHash, lpBuffer, dwFileSize, NULL) != FALSE)
34 {
35 BYTE bData[16]; DWORD dwDataLen;
36
37 if (CryptGetHashParam(hHash, HP_HASHVAL, bData, &dwDataLen, NULL) != FALSE)
38 {
39 if (dwDataLen == 16)
40 {
41 LPSTR lpStr = lpHash;
42
43 for (DWORD i = 0; i < dwDataLen; i++, lpStr += 2)
44 {
45 sprintf(lpStr, "%02X", bData[i]);
46 }
47
48 bResult = TRUE;
49 }
50 }
51 }
52
53 CryptDestroyHash(hHash);
54 }
55
56 CryptReleaseContext(hProv, NULL);
57 }
58 }
59
60 VirtualFree(lpBuffer, 0, MEM_RELEASE);
61 }
62 }
63
64 CloseHandle(hFile);
65 }
66
67 return bResult;
68 }
