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75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/*****************************************************************************
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* vlc_md5.h: MD5 hash
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*****************************************************************************
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* Copyright (C) 2004-2005 the VideoLAN team
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* $Id$
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*
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* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
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* Sam Hocevar <sam@zoy.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef VLC_MD5_H
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# define VLC_MD5_H
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/**
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* \file
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* This file defines functions and structures for handling md5 checksums
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*/
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/*****************************************************************************
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* md5_s: MD5 message structure
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*****************************************************************************
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* This structure stores the static information needed to compute an MD5
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* hash. It has an extra data buffer to allow non-aligned writes.
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*****************************************************************************/
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struct md5_s
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{
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uint64_t i_bits; /* Total written bits */
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uint32_t p_digest[4]; /* The MD5 digest */
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uint32_t p_data[16]; /* Buffer to cache non-aligned writes */
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};
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VLC_EXPORT(void, InitMD5, ( struct md5_s * ) );
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VLC_EXPORT(void, AddMD5, ( struct md5_s *, const void *, size_t ) );
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VLC_EXPORT(void, EndMD5, ( struct md5_s * ) );
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/**
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* Returns a char representation of the md5 hash, as shown by UNIX md5 or
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* md5sum tools.
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*/
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static inline char * psz_md5_hash( struct md5_s *md5_s )
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{
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char *psz = malloc( 33 ); /* md5 string is 32 bytes + NULL character */
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if( !psz ) return NULL;
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int i;
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for ( i = 0; i < 4; i++ )
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{
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sprintf( &psz[8*i], "%02x%02x%02x%02x",
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md5_s->p_digest[i] & 0xff,
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( md5_s->p_digest[i] >> 8 ) & 0xff,
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( md5_s->p_digest[i] >> 16 ) & 0xff,
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md5_s->p_digest[i] >> 24
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);
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}
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psz[32] = '\0';
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return psz;
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}
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#endif
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