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/*
* Copyright (C) 2007 1&1 Internet AG
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of opensips, a free SIP server.
*
* opensips 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
*
* opensips 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
*/
/*!
* \file
* \brief OpenSIPS MD5 handling functions
*/
#include <stdio.h>
#include <sys/stat.h>
#include "md5global.h"
#include "md5.h"
#include "md5utils.h"
#include "dprint.h"
#include "ut.h"
/*! \brief
* Calculate a MD5 digests over a string array and stores
* the result in the destination char array.
* This function assumes 32 bytes in the destination buffer.
* \param dest destination
* \param src string input array
* \param size elements in the input array
*/
void MD5StringArray(char *dest, str src[], unsigned int size)
{
MD5_CTX context;
unsigned char digest[16];
int i, len;
char *tmp;
MD5Init (&context);
for (i=0; i < size; i++) {
trim_len(len, tmp, src[i]);
MD5Update(&context, tmp, len);
}
MD5Final(digest, &context);
string2hex(digest, 16, dest);
LM_DBG("MD5 calculated: %.*s\n", MD5_LEN, dest);
}
/*! \brief
* Calculate a MD5 digest over a file.
* This function assumes 32 bytes in the destination buffer.
* \param dest destination
* \param file_name file for that the digest should be calculated
* \return zero on success, negative on errors
*/
int MD5File(char *dest, const char *file_name)
{
if (!dest || !file_name) {
LM_ERR("invalid parameter value\n");
return -1;
}
MD5_CTX context;
FILE *input;
unsigned char buffer[32768];
unsigned char hash[16];
unsigned int counter, size;
struct stat stats;
if (stat(file_name, &stats) != 0) {
LM_ERR("could not stat file %s\n", file_name);
return -1;
}
size = stats.st_size;
MD5Init(&context);
if((input = fopen(file_name, "rb")) == NULL) {
LM_ERR("could not open file %s\n", file_name);
return -1;
}
while(size) {
counter = (size > sizeof(buffer)) ? sizeof(buffer) : size;
if ((counter = fread(buffer, 1, counter, input)) <= 0) {
fclose(input);
return -1;
}
MD5Update(&context, buffer, counter);
size -= counter;
}
fclose(input);
MD5Final(hash, &context);
string2hex(hash, 16, dest);
LM_DBG("MD5 calculated: %.*s for file %s\n", MD5_LEN, dest, file_name);
return 0;
}
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