mbedtls/library/md.c

279 lines
6.3 KiB
C

/**
* \file md.c
*
* \brief Generic message digest wrapper for PolarSSL
*
* \author Adriaan de Jong <dejong@fox-it.com>
*
* Copyright (C) 2006-2010, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* This program 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.
*
* 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 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_MD_C)
#include "polarssl/md.h"
#include "polarssl/md_wrap.h"
#include <string.h>
#include <stdlib.h>
static const int supported_digests[] = {
#if defined(POLARSSL_MD2_C)
POLARSSL_MD_MD2,
#endif
#if defined(POLARSSL_MD4_C)
POLARSSL_MD_MD4,
#endif
#if defined(POLARSSL_MD5_C)
POLARSSL_MD_MD5,
#endif
#if defined(POLARSSL_SHA1_C)
POLARSSL_MD_SHA1,
#endif
#if defined(POLARSSL_SHA2_C)
POLARSSL_MD_SHA224,
POLARSSL_MD_SHA256,
#endif
#if defined(POLARSSL_SHA4_C)
POLARSSL_MD_SHA384,
POLARSSL_MD_SHA512,
#endif
0
};
const int *md_list( void )
{
return supported_digests;
}
const md_info_t *md_info_from_string( const char *md_name )
{
if( NULL == md_name )
return NULL;
/* Get the appropriate digest information */
#if defined(POLARSSL_MD2_C)
if( !strcasecmp( "MD2", md_name ) )
return md_info_from_type( POLARSSL_MD_MD2 );
#endif
#if defined(POLARSSL_MD4_C)
if( !strcasecmp( "MD4", md_name ) )
return md_info_from_type( POLARSSL_MD_MD4 );
#endif
#if defined(POLARSSL_MD5_C)
if( !strcasecmp( "MD5", md_name ) )
return md_info_from_type( POLARSSL_MD_MD5 );
#endif
#if defined(POLARSSL_SHA1_C)
if( !strcasecmp( "SHA1", md_name ) || !strcasecmp( "SHA", md_name ) )
return md_info_from_type( POLARSSL_MD_SHA1 );
#endif
#if defined(POLARSSL_SHA2_C)
if( !strcasecmp( "SHA224", md_name ) )
return md_info_from_type( POLARSSL_MD_SHA224 );
if( !strcasecmp( "SHA256", md_name ) )
return md_info_from_type( POLARSSL_MD_SHA256 );
#endif
#if defined(POLARSSL_SHA4_C)
if( !strcasecmp( "SHA384", md_name ) )
return md_info_from_type( POLARSSL_MD_SHA384 );
if( !strcasecmp( "SHA512", md_name ) )
return md_info_from_type( POLARSSL_MD_SHA512 );
#endif
return NULL;
}
const md_info_t *md_info_from_type( md_type_t md_type )
{
switch( md_type )
{
#if defined(POLARSSL_MD2_C)
case POLARSSL_MD_MD2:
return &md2_info;
#endif
#if defined(POLARSSL_MD4_C)
case POLARSSL_MD_MD4:
return &md4_info;
#endif
#if defined(POLARSSL_MD5_C)
case POLARSSL_MD_MD5:
return &md5_info;
#endif
#if defined(POLARSSL_SHA1_C)
case POLARSSL_MD_SHA1:
return &sha1_info;
#endif
#if defined(POLARSSL_SHA2_C)
case POLARSSL_MD_SHA224:
return &sha224_info;
case POLARSSL_MD_SHA256:
return &sha256_info;
#endif
#if defined(POLARSSL_SHA4_C)
case POLARSSL_MD_SHA384:
return &sha384_info;
case POLARSSL_MD_SHA512:
return &sha512_info;
#endif
default:
return NULL;
}
}
int md_starts( const md_info_t *md_info, md_context_t *ctx )
{
if( md_info == NULL )
return 1;
if( ctx == NULL || ctx->md_ctx != NULL )
return 1;
if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
return 1;
ctx->md_info = md_info;
md_info->starts_func( ctx->md_ctx );
return 0;
}
int md_update( md_context_t *ctx, const unsigned char *input, int ilen )
{
if( ctx == NULL || ctx->md_info == NULL )
return 1;
ctx->md_info->update_func( ctx->md_ctx, input, ilen );
return 0;
}
int md_finish( md_context_t *ctx, unsigned char *output )
{
if( ctx == NULL || ctx->md_info == NULL )
return 1;
ctx->md_info->finish_func( ctx->md_ctx, output );
return 0;
}
int md_free_ctx( md_context_t *ctx )
{
if( ctx == NULL || ctx->md_info == NULL )
return 1;
ctx->md_info->ctx_free_func( ctx->md_ctx );
return 0;
}
int md( const md_info_t *md_info, const unsigned char *input, int ilen,
unsigned char *output )
{
if ( md_info == NULL )
return 1;
md_info->digest_func( input, ilen, output );
return 0;
}
int md_file( const md_info_t *md_info, const char *path, unsigned char *output )
{
if( md_info == NULL )
return 3;
return md_info->file_func( path, output );
}
int md_hmac_starts( const md_info_t *md_info, md_context_t *ctx,
const unsigned char *key, int keylen )
{
if(md_info == NULL )
return 1;
if( ctx == NULL || ctx->md_ctx != NULL )
return 1;
if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
return 1;
ctx->md_info = md_info;
md_info->hmac_starts_func( ctx->md_ctx, key, keylen);
return 0;
}
int md_hmac_update( md_context_t *ctx, const unsigned char *input, int ilen )
{
if( ctx == NULL || ctx->md_info == NULL )
return 1;
ctx->md_info->hmac_update_func( ctx->md_ctx, input, ilen );
return 0;
}
int md_hmac_finish( md_context_t *ctx, unsigned char *output)
{
if( ctx == NULL || ctx->md_info == NULL )
return 1;
ctx->md_info->hmac_finish_func( ctx->md_ctx, output);
return 0;
}
int md_hmac_reset( md_context_t *ctx )
{
if( ctx == NULL || ctx->md_info == NULL )
return 1;
ctx->md_info->hmac_reset_func( ctx->md_ctx);
return 0;
}
int md_hmac( const md_info_t *md_info, const unsigned char *key, int keylen,
const unsigned char *input, int ilen,
unsigned char *output )
{
if( md_info == NULL )
return 1;
md_info->hmac_func( key, keylen, input, ilen, output );
return 0;
}
#endif