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md5.cpp
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117 lines (95 loc) · 2.85 KB
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/*
This file is part of Plugin Manager Plugin for Notepad++
Copyright (C)2009-2010 Dave Brotherstone <davegb@pobox.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "precompiled_headers.h"
#include <Wincrypt.h>
#include "libinstall/md5.h"
BOOL MD5::hash(const TCHAR *filename, TCHAR *hashBuffer, int hashBufferLength)
{
DWORD dwStatus = 0;
BOOL bResult = FALSE;
HCRYPTPROV hProv = 0;
HCRYPTHASH hHash = 0;
HANDLE hFile = NULL;
BYTE rgbFile[BUFSIZE];
DWORD cbRead = 0;
BYTE rgbHash[MD5LEN];
DWORD cbHash = 0;
if (hashBufferLength < ((MD5LEN * 2) + 1))
return FALSE;
hFile = CreateFile(filename,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_FLAG_SEQUENTIAL_SCAN,
NULL);
if (INVALID_HANDLE_VALUE == hFile)
{
return FALSE;
}
// Get handle to the crypto provider
if (!CryptAcquireContext(&hProv,
NULL,
NULL,
PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT))
{
CloseHandle(hFile);
return FALSE;
}
if (!CryptCreateHash(hProv, CALG_MD5, 0, 0, &hHash))
{
CryptReleaseContext(hProv, 0);
CloseHandle(hFile);
return FALSE;
}
do
{
bResult = ReadFile(hFile, rgbFile, BUFSIZE, &cbRead, NULL);
if (!bResult || 0 == cbRead)
break;
if (!CryptHashData(hHash, rgbFile, cbRead, 0))
{
return FALSE;
}
} while (bResult);
if (bResult == FALSE)
{
CryptReleaseContext(hProv, 0);
CryptDestroyHash(hHash);
CloseHandle(hFile);
return FALSE;
}
cbHash = MD5LEN;
if (CryptGetHashParam(hHash, HP_HASHVAL, rgbHash, &cbHash, 0))
{
TCHAR *currentHashBuffer = hashBuffer;
for (DWORD i = 0; i < cbHash; i++)
{
_stprintf_s(currentHashBuffer, hashBufferLength - (i * 2), _T("%02x"), rgbHash[i]);
currentHashBuffer += 2;
}
dwStatus = TRUE;
}
else
{
dwStatus = FALSE;
}
CryptDestroyHash(hHash);
CryptReleaseContext(hProv, 0);
CloseHandle(hFile);
return dwStatus;
}