/** | |
* \file mbedtls_md.c | |
* | |
* \brief Generic message digest wrapper for mbed TLS | |
* | |
* \author Adriaan de Jong <dejong@fox-it.com> | |
* | |
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved | |
* SPDX-License-Identifier: Apache-2.0 | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); you may | |
* not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
* This file is part of mbed TLS (https://tls.mbed.org) | |
*/ | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#if defined(MBEDTLS_MD_C) | |
#include "mbedtls/md.h" | |
#include "mbedtls/md_internal.h" | |
#include "mbedtls/platform_util.h" | |
#if defined(MBEDTLS_PLATFORM_C) | |
#include "mbedtls/platform.h" | |
#else | |
#include <stdlib.h> | |
#define mbedtls_calloc calloc | |
#define mbedtls_free free | |
#endif | |
#include <string.h> | |
#if defined(MBEDTLS_FS_IO) | |
#include <stdio.h> | |
#endif | |
/* | |
* Reminder: update profiles in x509_crt.c when adding a new hash! | |
*/ | |
static const int supported_digests[] = { | |
#if defined(MBEDTLS_SHA512_C) | |
MBEDTLS_MD_SHA512, | |
MBEDTLS_MD_SHA384, | |
#endif | |
#if defined(MBEDTLS_SHA256_C) | |
MBEDTLS_MD_SHA256, | |
MBEDTLS_MD_SHA224, | |
#endif | |
#if defined(MBEDTLS_SHA1_C) | |
MBEDTLS_MD_SHA1, | |
#endif | |
#if defined(MBEDTLS_RIPEMD160_C) | |
MBEDTLS_MD_RIPEMD160, | |
#endif | |
#if defined(MBEDTLS_MD5_C) | |
MBEDTLS_MD_MD5, | |
#endif | |
#if defined(MBEDTLS_MD4_C) | |
MBEDTLS_MD_MD4, | |
#endif | |
#if defined(MBEDTLS_MD2_C) | |
MBEDTLS_MD_MD2, | |
#endif | |
MBEDTLS_MD_NONE | |
}; | |
const int *mbedtls_md_list( void ) | |
{ | |
return( supported_digests ); | |
} | |
const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name ) | |
{ | |
if( NULL == md_name ) | |
return( NULL ); | |
/* Get the appropriate digest information */ | |
#if defined(MBEDTLS_MD2_C) | |
if( !strcmp( "MD2", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 ); | |
#endif | |
#if defined(MBEDTLS_MD4_C) | |
if( !strcmp( "MD4", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 ); | |
#endif | |
#if defined(MBEDTLS_MD5_C) | |
if( !strcmp( "MD5", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 ); | |
#endif | |
#if defined(MBEDTLS_RIPEMD160_C) | |
if( !strcmp( "RIPEMD160", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 ); | |
#endif | |
#if defined(MBEDTLS_SHA1_C) | |
if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 ); | |
#endif | |
#if defined(MBEDTLS_SHA256_C) | |
if( !strcmp( "SHA224", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 ); | |
if( !strcmp( "SHA256", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 ); | |
#endif | |
#if defined(MBEDTLS_SHA512_C) | |
if( !strcmp( "SHA384", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 ); | |
if( !strcmp( "SHA512", md_name ) ) | |
return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 ); | |
#endif | |
return( NULL ); | |
} | |
const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type ) | |
{ | |
switch( md_type ) | |
{ | |
#if defined(MBEDTLS_MD2_C) | |
case MBEDTLS_MD_MD2: | |
return( &mbedtls_md2_info ); | |
#endif | |
#if defined(MBEDTLS_MD4_C) | |
case MBEDTLS_MD_MD4: | |
return( &mbedtls_md4_info ); | |
#endif | |
#if defined(MBEDTLS_MD5_C) | |
case MBEDTLS_MD_MD5: | |
return( &mbedtls_md5_info ); | |
#endif | |
#if defined(MBEDTLS_RIPEMD160_C) | |
case MBEDTLS_MD_RIPEMD160: | |
return( &mbedtls_ripemd160_info ); | |
#endif | |
#if defined(MBEDTLS_SHA1_C) | |
case MBEDTLS_MD_SHA1: | |
return( &mbedtls_sha1_info ); | |
#endif | |
#if defined(MBEDTLS_SHA256_C) | |
case MBEDTLS_MD_SHA224: | |
return( &mbedtls_sha224_info ); | |
case MBEDTLS_MD_SHA256: | |
return( &mbedtls_sha256_info ); | |
#endif | |
#if defined(MBEDTLS_SHA512_C) | |
case MBEDTLS_MD_SHA384: | |
return( &mbedtls_sha384_info ); | |
case MBEDTLS_MD_SHA512: | |
return( &mbedtls_sha512_info ); | |
#endif | |
default: | |
return( NULL ); | |
} | |
} | |
void mbedtls_md_init( mbedtls_md_context_t *ctx ) | |
{ | |
memset( ctx, 0, sizeof( mbedtls_md_context_t ) ); | |
} | |
void mbedtls_md_free( mbedtls_md_context_t *ctx ) | |
{ | |
if( ctx == NULL || ctx->md_info == NULL ) | |
return; | |
if( ctx->md_ctx != NULL ) | |
ctx->md_info->ctx_free_func( ctx->md_ctx ); | |
if( ctx->hmac_ctx != NULL ) | |
{ | |
mbedtls_platform_zeroize( ctx->hmac_ctx, | |
2 * ctx->md_info->block_size ); | |
mbedtls_free( ctx->hmac_ctx ); | |
} | |
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md_context_t ) ); | |
} | |
int mbedtls_md_clone( mbedtls_md_context_t *dst, | |
const mbedtls_md_context_t *src ) | |
{ | |
if( dst == NULL || dst->md_info == NULL || | |
src == NULL || src->md_info == NULL || | |
dst->md_info != src->md_info ) | |
{ | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
} | |
dst->md_info->clone_func( dst->md_ctx, src->md_ctx ); | |
return( 0 ); | |
} | |
#if ! defined(MBEDTLS_DEPRECATED_REMOVED) | |
int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info ) | |
{ | |
return mbedtls_md_setup( ctx, md_info, 1 ); | |
} | |
#endif | |
int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac ) | |
{ | |
if( md_info == NULL || ctx == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL ) | |
return( MBEDTLS_ERR_MD_ALLOC_FAILED ); | |
if( hmac != 0 ) | |
{ | |
ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size ); | |
if( ctx->hmac_ctx == NULL ) | |
{ | |
md_info->ctx_free_func( ctx->md_ctx ); | |
return( MBEDTLS_ERR_MD_ALLOC_FAILED ); | |
} | |
} | |
ctx->md_info = md_info; | |
return( 0 ); | |
} | |
int mbedtls_md_starts( mbedtls_md_context_t *ctx ) | |
{ | |
if( ctx == NULL || ctx->md_info == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
return( ctx->md_info->starts_func( ctx->md_ctx ) ); | |
} | |
int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen ) | |
{ | |
if( ctx == NULL || ctx->md_info == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) ); | |
} | |
int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output ) | |
{ | |
if( ctx == NULL || ctx->md_info == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
return( ctx->md_info->finish_func( ctx->md_ctx, output ) ); | |
} | |
int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen, | |
unsigned char *output ) | |
{ | |
if( md_info == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
return( md_info->digest_func( input, ilen, output ) ); | |
} | |
#if defined(MBEDTLS_FS_IO) | |
int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output ) | |
{ | |
int ret; | |
FILE *f; | |
size_t n; | |
mbedtls_md_context_t ctx; | |
unsigned char buf[1024]; | |
if( md_info == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
if( ( f = fopen( path, "rb" ) ) == NULL ) | |
return( MBEDTLS_ERR_MD_FILE_IO_ERROR ); | |
mbedtls_md_init( &ctx ); | |
if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 ) | |
goto cleanup; | |
if( ( ret = md_info->starts_func( ctx.md_ctx ) ) != 0 ) | |
goto cleanup; | |
while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 ) | |
if( ( ret = md_info->update_func( ctx.md_ctx, buf, n ) ) != 0 ) | |
goto cleanup; | |
if( ferror( f ) != 0 ) | |
ret = MBEDTLS_ERR_MD_FILE_IO_ERROR; | |
else | |
ret = md_info->finish_func( ctx.md_ctx, output ); | |
cleanup: | |
mbedtls_platform_zeroize( buf, sizeof( buf ) ); | |
fclose( f ); | |
mbedtls_md_free( &ctx ); | |
return( ret ); | |
} | |
#endif /* MBEDTLS_FS_IO */ | |
int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen ) | |
{ | |
int ret; | |
unsigned char sum[MBEDTLS_MD_MAX_SIZE]; | |
unsigned char *ipad, *opad; | |
size_t i; | |
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL ) | |
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); | |
if( keylen > (size_t) ctx->md_info->block_size ) | |
{ | |
if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 ) | |
goto cleanup; | |
if( ( ret = ctx->md_info->update_func( ctx->md_ctx, key, keylen ) ) != 0 ) | |
goto cleanup; | |
if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, sum ) ) != 0 ) | |
goto cleanup; | |
keylen = ctx->md_info->size; | |
key = sum; | |
} | |
ipad = (unsigned char *) ctx->hmac_ctx; | |
opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size; | |
memset( ipad, 0x36, ctx->md_info->block_size ); | |
memset( opad, 0x5C, ctx->md_info->block_size ); | |
for( i = 0; i < keylen; i++ ) | |
{ | |
ipad[i] = (unsigned char)( ipad[i] ^ key[i] ); | |
opad[i] = (unsigned char)( opad[i] ^ key[i] ); | |
} | |
if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 ) | |
goto cleanup; | |
if( ( ret = ctx->md_info->update_func( ctx->md_ctx, ipad, | |
ctx->md_info->block_size ) ) != 0 ) | |
goto cleanup; | |
cleanup: | |
mbedtls_platform_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 */ |