1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
| #ifndef _WIN32_WINNT // Allow use of features specific to Windows XP or later.
#define _WIN32_WINNT 0x0501 // Change this to the appropriate value to target other versions of Windows.
#endif
#include <stdio.h>
#include <tchar.h>
#include <windows.h>
#define BUFFER_SIZE (1<<20)
ALG_ID hashIds[] = { CALG_MD5, CALG_SHA1/*, CALG_SHA_256*/ };
char const * hashNames[] = { "MD5 ", "SHA-1 ", "SHA-256" };
static BOOL DisplayHashValue(HCRYPTHASH hHash, LPCSTR name)
{
BOOL ret = FALSE;
DWORD cb = 0;
DWORD len = sizeof cb;
BOOL bCb = CryptGetHashParam(hHash, HP_HASHSIZE, (BYTE*)&cb, &len, 0);
if(bCb)
{
BYTE * hashVal = malloc(cb);
len = cb;
if(hashVal)
{
BOOL bVal = CryptGetHashParam(hHash, HP_HASHVAL, hashVal, &len, 0);
if(bVal)
{
size_t i;
printf("%s : ", name);
for(i=0 ; i<len ; i++)
{
printf("%02x", hashVal[i]);
}
putchar('\n');
ret = TRUE;
}
free(hashVal);
}
}
return ret;
}
static BOOL HashOneFile(LPCTSTR fileName, HCRYPTPROV hProv, LPVOID buf, DWORD size)
{
BOOL ret = FALSE;
HCRYPTHASH hHash[ARRAYSIZE(hashIds)] = {0};
BOOL bHashes = TRUE;
size_t iHash;
for(iHash=0 ; iHash < ARRAYSIZE(hashIds) && bHashes; iHash++)
bHashes = bHashes && CryptCreateHash(hProv, hashIds[iHash], 0, 0, &hHash[iHash]);
if(bHashes)
{
HANDLE hFile = CreateFile(fileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
if(hFile != INVALID_HANDLE_VALUE)
{
DWORD dwRead = 0;
BOOL bRead = FALSE;
bHashes = TRUE;
do
{
bRead = ReadFile(hFile, buf, size, &dwRead, NULL);
if(!bRead)
break;
for(iHash=0 ; iHash < ARRAYSIZE(hashIds) && bHashes; iHash++)
bHashes &= CryptHashData(hHash[iHash], buf, dwRead, 0);
} while(bRead && dwRead != 0 && bHashes);
if(bRead && bHashes)
{
ret = TRUE;
for(iHash=0 ; iHash < ARRAYSIZE(hashIds) ; iHash++)
ret &= DisplayHashValue(hHash[iHash], hashNames[iHash]);
}
CloseHandle(hFile);
}
for(iHash=0 ; iHash < ARRAYSIZE(hashIds) ; iHash++)
CryptDestroyHash(hHash[iHash]);
}
else
{
size_t nHashes = iHash;
for(iHash=0 ; iHash < nHashes ; iHash++)
CryptDestroyHash(hHash[iHash]);
}
return ret;
}
int _tmain(int argc, _TCHAR* argv[])
{
int ret = EXIT_FAILURE;
HCRYPTPROV hProv = 0;
BOOL bProv = FALSE;
if(argc<2)
{
puts("Usage: HashFile <filename>");
return 1;
}
bProv = CryptAcquireContext(&hProv, NULL, NULL, PROV_DSS/*PROV_RSA_FULL*/, CRYPT_VERIFYCONTEXT);
if(!bProv)
{
fprintf(stderr, "CryptAcquireContext() failed with error %lu.\n", GetLastError());
}
else
{
LPVOID buf = VirtualAlloc(NULL, BUFFER_SIZE, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
if(buf==NULL)
{
fprintf(stderr, "VirtualAlloc() failed with error %lu.\n", GetLastError());
}
else
{
if(HashOneFile(argv[1], hProv, buf, BUFFER_SIZE))
ret = EXIT_SUCCESS;
else
fprintf(stderr, "HashOneFile() failed (last Win32 error: %lu).\n", GetLastError());
VirtualFree(buf, 0, MEM_RELEASE);
}
CryptReleaseContext(hProv, 0);
}
if(ret != EXIT_SUCCESS)
fprintf(stderr, "Failed.\n");
return ret;
} |
