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/**
* @file md5_helper.c
* @brief MD5 checksum generation.
* @author Patrick Roth - roth@stettbacher.ch
* @date 2010-04-30
* @copyright 2010 Stettbacher Signal Processing AG
*
* @remarks
*
* <PRE>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* </PRE>
*
*/
#include <stdio.h>
#include "md5.h"
/**
* Generate the MD5 checksum.
*
* @param addr: A pointer to the start address.
* @param size: The size to compare.
* @param buf: Destination buffer; must provide room for 32+1 chars!
* @return A pointer to the first digit of the generated MD5 checksum. The
* checksum's length is always 16 bytes.
*/
void getMd5ChecksumString(void *addr, ssize_t size, char *buf)
{
MD5_CTX md5;
MD5Init(&md5);
MD5Update(&md5, (unsigned char*)(addr), (unsigned int)size);
MD5Final(&md5);
for(int i = 0; i < 16; i++) {
sprintf(buf+i*2, "%02x", md5.digest[i]);
}
*(buf+32) = '\0';
}
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