mirror of git://git.gnupg.org/gnupg.git
159 lines
3.1 KiB
C
159 lines
3.1 KiB
C
/* md.c - message digest dispatcher
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* Copyright (c) 1997 by Werner Koch (dd9jn)
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*
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* This file is part of G10.
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*
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* G10 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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* G10 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "util.h"
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#include "cipher.h"
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#include "errors.h"
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int
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md_okay( int algo )
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{
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switch( algo ) {
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case DIGEST_ALGO_MD5:
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case DIGEST_ALGO_RMD160:
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return 0;
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default:
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return G10ERR_DIGEST_ALGO;
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}
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}
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MD_HANDLE *
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md_open( int algo, int secure )
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{
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MD_HANDLE *hd;
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hd = m_alloc( sizeof *hd + 19 );
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hd->algo = algo;
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hd->datalen = 0;
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if( algo == DIGEST_ALGO_MD5 )
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hd->u.md5 = md5_open( secure );
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else if( algo == DIGEST_ALGO_RMD160 )
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hd->u.rmd= rmd160_open( secure );
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else
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return NULL;
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return hd;
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}
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MD_HANDLE *
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md_copy( MD_HANDLE *a )
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{
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MD_HANDLE *hd;
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hd = m_alloc( sizeof *hd + 19 );
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hd->algo = a->algo;
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hd->datalen = 0;
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if( a->algo == DIGEST_ALGO_MD5 )
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hd->u.md5 = md5_copy( a->u.md5 );
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else if( a->algo == DIGEST_ALGO_RMD160 )
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hd->u.rmd= rmd160_copy( a->u.rmd );
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else
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log_bug(NULL);
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return hd;
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}
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/* used for a BAD Kludge in rmd160.c, md5.c */
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MD_HANDLE *
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md_makecontainer( int algo )
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{
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MD_HANDLE *hd;
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hd = m_alloc( sizeof *hd + 19 );
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hd->algo = algo;
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hd->datalen = 0;
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if( algo == DIGEST_ALGO_MD5 )
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;
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else if( algo == DIGEST_ALGO_RMD160 )
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;
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else
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log_bug(NULL);
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return hd;
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}
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void
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md_close(MD_HANDLE *a)
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{
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if( !a )
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return;
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if( a->algo == DIGEST_ALGO_MD5 )
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md5_close( a->u.md5 );
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else if( a->algo == DIGEST_ALGO_RMD160 )
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rmd160_close( a->u.rmd );
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else
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log_bug(NULL);
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m_free(a);
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}
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void
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md_write( MD_HANDLE *a, byte *inbuf, size_t inlen)
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{
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if( a->algo == DIGEST_ALGO_MD5 )
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md5_write( a->u.md5, inbuf, inlen );
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else if( a->algo == DIGEST_ALGO_RMD160 )
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rmd160_write( a->u.rmd, inbuf, inlen );
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else
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log_bug(NULL);
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}
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void
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md_putchar( MD_HANDLE *a, int c )
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{
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if( a->algo == DIGEST_ALGO_MD5 )
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md5_putchar( a->u.md5, c );
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else if( a->algo == DIGEST_ALGO_RMD160 )
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rmd160_putchar( a->u.rmd, c );
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else
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log_bug(NULL);
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}
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byte *
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md_final(MD_HANDLE *a)
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{
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if( a->algo == DIGEST_ALGO_MD5 ) {
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if( !a->datalen ) {
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md5_final( a->u.md5 );
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memcpy(a->data, md5_read( a->u.md5 ), 16);
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a->datalen = 16;
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}
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return a->data;
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}
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else if( a->algo == DIGEST_ALGO_RMD160 ) {
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if( !a->datalen ) {
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memcpy(a->data, rmd160_final( a->u.rmd ), 20 );
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a->datalen = 20;
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}
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return a->data;
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}
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else
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log_bug(NULL);
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}
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