include/vlc_md5.h

   1 /*****************************************************************************
   2  * vlc_md5.h: MD5 hash
   3  *****************************************************************************
   4  * Copyright © 2004-2011 VLC authors and VideoLAN
   5  *
   6  * Authors: Rémi Denis-Courmont
   7  *          Rafaël Carré
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef VLC_MD5_H
  25 # define VLC_MD5_H
  26
  27 /**
  28  * \file
  29  * This file defines functions and structures to compute MD5 digests
  30  */
  31
  32 struct md5_s
  33 {
  34     uint32_t A, B, C, D;          /* chaining variables */
  35     uint32_t nblocks;
  36     uint8_t buf[64];
  37     int count;
  38 };
  39
  40 VLC_API void InitMD5( struct md5_s * );
  41 VLC_API void AddMD5( struct md5_s *, const void *, size_t );
  42 VLC_API void EndMD5( struct md5_s * );
  43
  44 /**
  45  * Returns a char representation of the md5 hash, as shown by UNIX md5 or
  46  * md5sum tools.
  47  */
  48 static inline char * psz_md5_hash( struct md5_s *md5_s )
  49 {
  50     char *psz = (char*)malloc( 33 ); /* md5 string is 32 bytes + NULL character */
  51     if( likely(psz) )
  52     {
  53         for( int i = 0; i < 16; i++ )
  54             sprintf( &psz[2*i], "%02" PRIx8, md5_s->buf[i] );
  55     }
  56     return psz;
  57 }
  58
  59 #endif