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/* mdapi.c - message digest function interface
* Copyright (C) 1998 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#define GCRYPT_NO_MPI_MACROS 1
#include "g10lib.h"
#include "cipher.h"
#include "memory.h"
int
gcry_md_open( GCRY_MD_HD *ret_hd, int algo, unsigned flags )
{
GCRY_MD_HD hd;
/* fixme: check that algo is available and that only valid
* flag values are used */
hd = md_open( algo, (flags & GCRY_MD_FLAG_SECURE) );
*ret_hd = hd;
return 0;
}
void
gcry_md_close( GCRY_MD_HD hd )
{
md_close( hd );
}
int
gcry_md_enable( GCRY_MD_HD hd, int algo )
{
/* fixme: check that algo is available */
md_enable( hd, algo );
return 0;
}
GCRY_MD_HD
gcry_md_copy( GCRY_MD_HD hd )
{
return md_copy( hd );
}
int
gcry_md_ctl( GCRY_MD_HD hd, int cmd, byte *buffer, size_t buflen)
{
if( cmd == GCRYCTL_FINALIZE )
md_final( hd );
else if( cmd == GCRYCTL_FINALIZE )
md_final( hd );
else
return GCRYERR_INV_OP;
return 0;
}
void
gcry_md_write( GCRY_MD_HD hd, const byte *inbuf, size_t inlen)
{
md_write( hd, (byte*)inbuf, inlen );
}
/****************
* Read out the complete digest, this function implictly finalizes
* the hash.
*/
byte *
gcry_md_read( GCRY_MD_HD hd, int algo )
{
gcry_md_ctl( hd, GCRYCTL_FINALIZE, NULL, 0 );
return md_read( hd, algo);
}
int
gcry_md_algo( GCRY_MD_HD hd )
{
return md_get_algo( hd );
}
/****************
* Return the length of the digest in bytes.
*/
size_t
gcry_md_dlen( int algo )
{
/* we do some very quick checks here */
switch( algo )
{
case GCRY_MD_MD5: return 16;
case GCRY_MD_SHA1:
case GCRY_MD_RMD160: return 20;
default: return 0; /* fixme: pass it to a lookup function */
}
}
/****************
* Read out an intermediate digest.
*/
int
gcry_md_get( GCRY_MD_HD hd, int algo, byte *buffer, int buflen )
{
return GCRYERR_INTERNAL;
}
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