479 lines
13 KiB
C
479 lines
13 KiB
C
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/**
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* \file mbedtls_md.c
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*
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* \brief Generic message digest wrapper for mbed TLS
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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) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_MD_C)
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#include "mbedtls/md.h"
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#include "mbedtls/md_internal.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdlib.h>
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif
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#include <string.h>
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#if defined(MBEDTLS_FS_IO)
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#include <stdio.h>
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#endif
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/* Implementation that should never be optimized out by the compiler */
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static void mbedtls_zeroize( void *v, size_t n ) {
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volatile unsigned char *p = v; while( n-- ) *p++ = 0;
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}
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/*
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* Reminder: update profiles in x509_crt.c when adding a new hash!
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*/
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static const int supported_digests[] = {
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#if defined(MBEDTLS_SHA512_C)
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MBEDTLS_MD_SHA512,
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MBEDTLS_MD_SHA384,
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#endif
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#if defined(MBEDTLS_SHA256_C)
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MBEDTLS_MD_SHA256,
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MBEDTLS_MD_SHA224,
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#endif
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#if defined(MBEDTLS_SHA1_C)
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MBEDTLS_MD_SHA1,
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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MBEDTLS_MD_RIPEMD160,
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#endif
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#if defined(MBEDTLS_MD5_C)
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MBEDTLS_MD_MD5,
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#endif
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#if defined(MBEDTLS_MD4_C)
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MBEDTLS_MD_MD4,
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#endif
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#if defined(MBEDTLS_MD2_C)
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MBEDTLS_MD_MD2,
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#endif
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MBEDTLS_MD_NONE
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};
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const int *mbedtls_md_list( void )
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{
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return( supported_digests );
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}
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const mbedtls_md_info_t *mbedtls_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(MBEDTLS_MD2_C)
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if( !strcmp( "MD2", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 );
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#endif
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#if defined(MBEDTLS_MD4_C)
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if( !strcmp( "MD4", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 );
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#endif
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#if defined(MBEDTLS_MD5_C)
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if( !strcmp( "MD5", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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if( !strcmp( "RIPEMD160", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
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#endif
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#if defined(MBEDTLS_SHA1_C)
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if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
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#endif
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#if defined(MBEDTLS_SHA256_C)
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if( !strcmp( "SHA224", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
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if( !strcmp( "SHA256", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
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#endif
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#if defined(MBEDTLS_SHA512_C)
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if( !strcmp( "SHA384", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
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if( !strcmp( "SHA512", md_name ) )
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return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
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#endif
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return( NULL );
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}
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const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_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(MBEDTLS_MD2_C)
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case MBEDTLS_MD_MD2:
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return( &mbedtls_md2_info );
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#endif
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#if defined(MBEDTLS_MD4_C)
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case MBEDTLS_MD_MD4:
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return( &mbedtls_md4_info );
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#endif
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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return( &mbedtls_md5_info );
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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return( &mbedtls_ripemd160_info );
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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return( &mbedtls_sha1_info );
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA224:
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return( &mbedtls_sha224_info );
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case MBEDTLS_MD_SHA256:
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return( &mbedtls_sha256_info );
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA384:
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return( &mbedtls_sha384_info );
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case MBEDTLS_MD_SHA512:
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return( &mbedtls_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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void mbedtls_md_init( mbedtls_md_context_t *ctx )
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{
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memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
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}
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void mbedtls_md_free( mbedtls_md_context_t *ctx )
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{
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if( ctx == NULL || ctx->md_info == NULL )
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return;
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if( ctx->md_ctx != NULL )
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ctx->md_info->ctx_free_func( ctx->md_ctx );
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if( ctx->hmac_ctx != NULL )
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{
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mbedtls_zeroize( ctx->hmac_ctx, 2 * ctx->md_info->block_size );
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mbedtls_free( ctx->hmac_ctx );
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}
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mbedtls_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
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}
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int mbedtls_md_clone( mbedtls_md_context_t *dst,
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const mbedtls_md_context_t *src )
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{
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if( dst == NULL || dst->md_info == NULL ||
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src == NULL || src->md_info == NULL ||
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dst->md_info != src->md_info )
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{
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return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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}
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dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
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return( 0 );
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}
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#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
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int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
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{
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return mbedtls_md_setup( ctx, md_info, 1 );
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}
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#endif
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int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
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{
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if( md_info == NULL || ctx == NULL )
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return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
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return( MBEDTLS_ERR_MD_ALLOC_FAILED );
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if( hmac != 0 )
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{
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ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
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if( ctx->hmac_ctx == NULL )
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{
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md_info->ctx_free_func( ctx->md_ctx );
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return( MBEDTLS_ERR_MD_ALLOC_FAILED );
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}
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}
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ctx->md_info = md_info;
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return( 0 );
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}
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int mbedtls_md_starts( mbedtls_md_context_t *ctx )
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{
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if( ctx == NULL || ctx->md_info == NULL )
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return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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return( ctx->md_info->starts_func( ctx->md_ctx ) );
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}
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int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
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{
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if( ctx == NULL || ctx->md_info == NULL )
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return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
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}
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int mbedtls_md_finish( mbedtls_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( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
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}
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int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t 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( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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return( md_info->digest_func( input, ilen, output ) );
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}
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#if defined(MBEDTLS_FS_IO)
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int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
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{
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int ret;
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FILE *f;
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size_t n;
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mbedtls_md_context_t ctx;
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unsigned char buf[1024];
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if( md_info == NULL )
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return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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if( ( f = fopen( path, "rb" ) ) == NULL )
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return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
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mbedtls_md_init( &ctx );
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if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
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goto cleanup;
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if( ( ret = md_info->starts_func( ctx.md_ctx ) ) != 0 )
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goto cleanup;
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while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
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if( ( ret = md_info->update_func( ctx.md_ctx, buf, n ) ) != 0 )
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goto cleanup;
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if( ferror( f ) != 0 )
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ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
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else
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ret = md_info->finish_func( ctx.md_ctx, output );
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cleanup:
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mbedtls_zeroize( buf, sizeof( buf ) );
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fclose( f );
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mbedtls_md_free( &ctx );
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return( ret );
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}
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#endif /* MBEDTLS_FS_IO */
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int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
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{
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int ret;
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unsigned char sum[MBEDTLS_MD_MAX_SIZE];
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unsigned char *ipad, *opad;
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size_t i;
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if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
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return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
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if( keylen > (size_t) ctx->md_info->block_size )
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{
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if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
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goto cleanup;
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if( ( ret = ctx->md_info->update_func( ctx->md_ctx, key, keylen ) ) != 0 )
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goto cleanup;
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if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, sum ) ) != 0 )
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goto cleanup;
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keylen = ctx->md_info->size;
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key = sum;
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}
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ipad = (unsigned char *) ctx->hmac_ctx;
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opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
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memset( ipad, 0x36, ctx->md_info->block_size );
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memset( opad, 0x5C, ctx->md_info->block_size );
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for( i = 0; i < keylen; i++ )
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{
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ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
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opad[i] = (unsigned char)( opad[i] ^ key[i] );
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}
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if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
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goto cleanup;
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if( ( ret = ctx->md_info->update_func( ctx->md_ctx, ipad,
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ctx->md_info->block_size ) ) != 0 )
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||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
mbedtls_zeroize( sum, sizeof( sum ) );
|
||
|
|
|
||
|
|
return( ret );
|
||
|
|
}
|
||
|
|
|
||
|
|
int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
|
||
|
|
{
|
||
|
|
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
|
||
|
|
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
|
||
|
|
|
||
|
|
return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
|
||
|
|
unsigned char *opad;
|
||
|
|
|
||
|
|
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
|
||
|
|
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
|
||
|
|
|
||
|
|
opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
|
||
|
|
|
||
|
|
if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, tmp ) ) != 0 )
|
||
|
|
return( ret );
|
||
|
|
if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
|
||
|
|
return( ret );
|
||
|
|
if( ( ret = ctx->md_info->update_func( ctx->md_ctx, opad,
|
||
|
|
ctx->md_info->block_size ) ) != 0 )
|
||
|
|
return( ret );
|
||
|
|
if( ( ret = ctx->md_info->update_func( ctx->md_ctx, tmp,
|
||
|
|
ctx->md_info->size ) ) != 0 )
|
||
|
|
return( ret );
|
||
|
|
return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
unsigned char *ipad;
|
||
|
|
|
||
|
|
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
|
||
|
|
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
|
||
|
|
|
||
|
|
ipad = (unsigned char *) ctx->hmac_ctx;
|
||
|
|
|
||
|
|
if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
|
||
|
|
return( ret );
|
||
|
|
return( ctx->md_info->update_func( ctx->md_ctx, ipad,
|
||
|
|
ctx->md_info->block_size ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
int mbedtls_md_hmac( const mbedtls_md_info_t *md_info,
|
||
|
|
const unsigned char *key, size_t keylen,
|
||
|
|
const unsigned char *input, size_t ilen,
|
||
|
|
unsigned char *output )
|
||
|
|
{
|
||
|
|
mbedtls_md_context_t ctx;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if( md_info == NULL )
|
||
|
|
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
|
||
|
|
|
||
|
|
mbedtls_md_init( &ctx );
|
||
|
|
|
||
|
|
if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if( ( ret = mbedtls_md_hmac_starts( &ctx, key, keylen ) ) != 0 )
|
||
|
|
goto cleanup;
|
||
|
|
if( ( ret = mbedtls_md_hmac_update( &ctx, input, ilen ) ) != 0 )
|
||
|
|
goto cleanup;
|
||
|
|
if( ( ret = mbedtls_md_hmac_finish( &ctx, output ) ) != 0 )
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
mbedtls_md_free( &ctx );
|
||
|
|
|
||
|
|
return( ret );
|
||
|
|
}
|
||
|
|
|
||
|
|
int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
|
||
|
|
{
|
||
|
|
if( ctx == NULL || ctx->md_info == NULL )
|
||
|
|
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
|
||
|
|
|
||
|
|
return( ctx->md_info->process_func( ctx->md_ctx, data ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
|
||
|
|
{
|
||
|
|
if( md_info == NULL )
|
||
|
|
return( 0 );
|
||
|
|
|
||
|
|
return md_info->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
|
||
|
|
{
|
||
|
|
if( md_info == NULL )
|
||
|
|
return( MBEDTLS_MD_NONE );
|
||
|
|
|
||
|
|
return md_info->type;
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
|
||
|
|
{
|
||
|
|
if( md_info == NULL )
|
||
|
|
return( NULL );
|
||
|
|
|
||
|
|
return md_info->name;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* MBEDTLS_MD_C */
|