| /** |
| * \file md.c |
| * |
| * \brief Generic message digest wrapper for PolarSSL |
| * |
| * \author Adriaan de Jong <dejong@fox-it.com> |
| * |
| * Copyright (C) 2006-2014, 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. |
| */ |
| |
| #if !defined(POLARSSL_CONFIG_FILE) |
| #include "polarssl/config.h" |
| #else |
| #include POLARSSL_CONFIG_FILE |
| #endif |
| |
| #if defined(POLARSSL_MD_C) |
| |
| #include "polarssl/md.h" |
| #include "polarssl/md_wrap.h" |
| |
| #include <stdlib.h> |
| |
| #if defined(_MSC_VER) && !defined strcasecmp && !defined(EFIX64) && \ |
| !defined(EFI32) |
| #define strcasecmp _stricmp |
| #endif |
| |
| /* Implementation that should never be optimized out by the compiler */ |
| static void polarssl_zeroize( void *v, size_t n ) { |
| volatile unsigned char *p = v; while( n-- ) *p++ = 0; |
| } |
| |
| static const int supported_digests[] = { |
| |
| #if defined(POLARSSL_SHA512_C) |
| POLARSSL_MD_SHA384, |
| POLARSSL_MD_SHA512, |
| #endif |
| |
| #if defined(POLARSSL_SHA256_C) |
| POLARSSL_MD_SHA224, |
| POLARSSL_MD_SHA256, |
| #endif |
| |
| #if defined(POLARSSL_SHA1_C) |
| POLARSSL_MD_SHA1, |
| #endif |
| |
| #if defined(POLARSSL_RIPEMD160_C) |
| POLARSSL_MD_RIPEMD160, |
| #endif |
| |
| #if defined(POLARSSL_MD5_C) |
| POLARSSL_MD_MD5, |
| #endif |
| |
| #if defined(POLARSSL_MD4_C) |
| POLARSSL_MD_MD4, |
| #endif |
| |
| #if defined(POLARSSL_MD2_C) |
| POLARSSL_MD_MD2, |
| #endif |
| |
| POLARSSL_MD_NONE |
| }; |
| |
| 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_RIPEMD160_C) |
| if( !strcasecmp( "RIPEMD160", md_name ) ) |
| return md_info_from_type( POLARSSL_MD_RIPEMD160 ); |
| #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_SHA256_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_SHA512_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_RIPEMD160_C) |
| case POLARSSL_MD_RIPEMD160: |
| return( &ripemd160_info ); |
| #endif |
| #if defined(POLARSSL_SHA1_C) |
| case POLARSSL_MD_SHA1: |
| return( &sha1_info ); |
| #endif |
| #if defined(POLARSSL_SHA256_C) |
| case POLARSSL_MD_SHA224: |
| return( &sha224_info ); |
| case POLARSSL_MD_SHA256: |
| return( &sha256_info ); |
| #endif |
| #if defined(POLARSSL_SHA512_C) |
| case POLARSSL_MD_SHA384: |
| return( &sha384_info ); |
| case POLARSSL_MD_SHA512: |
| return( &sha512_info ); |
| #endif |
| default: |
| return( NULL ); |
| } |
| } |
| |
| int md_init_ctx( md_context_t *ctx, const md_info_t *md_info ) |
| { |
| if( md_info == NULL || ctx == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| memset( ctx, 0, sizeof( md_context_t ) ); |
| |
| if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL ) |
| return( POLARSSL_ERR_MD_ALLOC_FAILED ); |
| |
| ctx->md_info = md_info; |
| |
| md_info->starts_func( ctx->md_ctx ); |
| |
| return( 0 ); |
| } |
| |
| int md_free_ctx( md_context_t *ctx ) |
| { |
| if( ctx == NULL || ctx->md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| ctx->md_info->ctx_free_func( ctx->md_ctx ); |
| |
| polarssl_zeroize( ctx, sizeof( md_context_t ) ); |
| |
| return( 0 ); |
| } |
| |
| int md_starts( md_context_t *ctx ) |
| { |
| if( ctx == NULL || ctx->md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| ctx->md_info->starts_func( ctx->md_ctx ); |
| |
| return( 0 ); |
| } |
| |
| int md_update( md_context_t *ctx, const unsigned char *input, size_t ilen ) |
| { |
| if( ctx == NULL || ctx->md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| 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( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| ctx->md_info->finish_func( ctx->md_ctx, output ); |
| |
| return( 0 ); |
| } |
| |
| int md( const md_info_t *md_info, const unsigned char *input, size_t ilen, |
| unsigned char *output ) |
| { |
| if( md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| 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 defined(POLARSSL_FS_IO) |
| int ret; |
| #endif |
| |
| if( md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| #if defined(POLARSSL_FS_IO) |
| ret = md_info->file_func( path, output ); |
| if( ret != 0 ) |
| return( POLARSSL_ERR_MD_FILE_IO_ERROR + ret ); |
| |
| return( ret ); |
| #else |
| ((void) path); |
| ((void) output); |
| |
| return( POLARSSL_ERR_MD_FEATURE_UNAVAILABLE ); |
| #endif /* POLARSSL_FS_IO */ |
| } |
| |
| int md_hmac_starts( md_context_t *ctx, const unsigned char *key, size_t keylen ) |
| { |
| if( ctx == NULL || ctx->md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| ctx->md_info->hmac_starts_func( ctx->md_ctx, key, keylen ); |
| |
| return( 0 ); |
| } |
| |
| int md_hmac_update( md_context_t *ctx, const unsigned char *input, size_t ilen ) |
| { |
| if( ctx == NULL || ctx->md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| 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( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| 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( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| ctx->md_info->hmac_reset_func( ctx->md_ctx ); |
| |
| return( 0 ); |
| } |
| |
| int md_hmac( const md_info_t *md_info, const unsigned char *key, size_t keylen, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output ) |
| { |
| if( md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| md_info->hmac_func( key, keylen, input, ilen, output ); |
| |
| return( 0 ); |
| } |
| |
| int md_process( md_context_t *ctx, const unsigned char *data ) |
| { |
| if( ctx == NULL || ctx->md_info == NULL ) |
| return( POLARSSL_ERR_MD_BAD_INPUT_DATA ); |
| |
| ctx->md_info->process_func( ctx->md_ctx, data ); |
| |
| return( 0 ); |
| } |
| |
| #endif /* POLARSSL_MD_C */ |