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