133 lines
3.3 KiB
C++
133 lines
3.3 KiB
C++
/***************************************************************************
|
|
* Copyright (C) 2007 by Lothar May *
|
|
* *
|
|
* 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., *
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
***************************************************************************/
|
|
|
|
#include "crypthelper.h"
|
|
|
|
|
|
#include <core/openssl_wrapper.h>
|
|
#include <cstring>
|
|
#include <cstdio>
|
|
|
|
using namespace std;
|
|
|
|
// Helper function.
|
|
static int
|
|
fromHex(int ch)
|
|
{
|
|
int retVal = -1;
|
|
|
|
if (ch >= '0' && ch <= '9')
|
|
retVal = ch - '0';
|
|
else if (ch >= 'a' && ch <= 'f')
|
|
retVal = ch - 'a' + 10;
|
|
else if (ch >= 'A' && ch <= 'F')
|
|
retVal = ch - 'A' + 10;
|
|
|
|
return retVal;
|
|
}
|
|
|
|
|
|
MD5Buf::MD5Buf()
|
|
{
|
|
memset(data, 0, sizeof(data));
|
|
}
|
|
|
|
|
|
std::string
|
|
MD5Buf::ToString() const
|
|
{
|
|
// Create a hex-based string from the MD5 data.
|
|
string retValue;
|
|
char tmpBuf[2 + 1];
|
|
tmpBuf[sizeof(tmpBuf) - 1] = 0;
|
|
for (int i = 0; i < MD5_DATA_SIZE; i++)
|
|
{
|
|
sprintf(tmpBuf, "%02x", data[i]);
|
|
retValue += tmpBuf;
|
|
}
|
|
return retValue;
|
|
}
|
|
|
|
bool
|
|
MD5Buf::FromString(const std::string &text)
|
|
{
|
|
// Convert hex-based string to MD5 data.
|
|
bool retVal = false;
|
|
if (text.size() == 2 * MD5_DATA_SIZE)
|
|
{
|
|
unsigned char *tmpData = data;
|
|
const char *t = text.c_str();
|
|
int i = 0;
|
|
for (; i < MD5_DATA_SIZE; i++) {
|
|
int part1 = fromHex(*t++);
|
|
if (part1 == -1)
|
|
break;
|
|
int part2 = fromHex(*t++);
|
|
if (part2 == -1)
|
|
break;
|
|
*tmpData++ = (part1<<4) + part2;
|
|
}
|
|
retVal = i == MD5_DATA_SIZE;
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
bool
|
|
MD5Buf::IsZero() const
|
|
{
|
|
return *this == MD5Buf();
|
|
}
|
|
|
|
bool
|
|
MD5Buf::operator==(const MD5Buf &other) const
|
|
{
|
|
return memcmp(data, other.data, MD5_DATA_SIZE) == 0;
|
|
}
|
|
|
|
bool
|
|
MD5Buf::operator<(const MD5Buf &other) const
|
|
{
|
|
return memcmp(data, other.data, MD5_DATA_SIZE) < 0;
|
|
}
|
|
|
|
bool
|
|
CryptHelper::MD5Sum(const std::string &fileName, MD5Buf &buf)
|
|
{
|
|
bool retVal = false;
|
|
FILE *file = fopen(fileName.c_str(), "rb");
|
|
|
|
if (file)
|
|
{
|
|
// Calculate MD5 sum of file.
|
|
unsigned char readBuf[8192];
|
|
MD5_CTX context;
|
|
int numBytes;
|
|
|
|
MD5_Init(&context);
|
|
while ((numBytes = fread(readBuf, 1, sizeof(readBuf), file)) > 0)
|
|
MD5_Update(&context, readBuf, numBytes);
|
|
MD5_Final(buf.data, &context);
|
|
retVal = ferror(file) == 0;
|
|
|
|
fclose(file);
|
|
}
|
|
return retVal;
|
|
}
|
|
|