vlc_md5.h

/*****************************************************************************
 * vlc_md5.h: MD5 hash
 *****************************************************************************
 * Copyright © 2004-2011 VLC authors and VideoLAN
 *
 * Authors: Rémi Denis-Courmont
 *          Rafaël Carré
 *
 * This program 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 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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.
 *****************************************************************************/

#ifndef VLC_MD5_H
# define VLC_MD5_H

/**
 * \file
 * This file defines functions and structures to compute MD5 digests
 */

struct md5_s
{
    uint32_t A, B, C, D;          /* chaining variables */
    uint32_t nblocks;
    uint8_t buf[64];
    int count;
};

VLC_API void InitMD5( struct md5_s * );
VLC_API void AddMD5( struct md5_s *, const void *, size_t );
VLC_API void EndMD5( struct md5_s * );

/**
 * Returns a char representation of the md5 hash, as shown by UNIX md5 or
 * md5sum tools.
 */
static inline char * psz_md5_hash( struct md5_s *md5_s )
{
    char *psz = (char*)malloc( 33 ); /* md5 string is 32 bytes + NULL character */
    if( likely(psz) )
    {
        for( int i = 0; i < 16; i++ )
            sprintf( &psz[2*i], "%02" PRIx8, md5_s->buf[i] );
    }
    return psz;
}

#endif