EL4121 Embedded System / mbed-os

mbed-os

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features/mbedtls/src/md.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /**
be_bryan 0:b74591d5ab33 2 * \file mbedtls_md.c
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * \brief Generic message digest wrapper for mbed TLS
be_bryan 0:b74591d5ab33 5 *
be_bryan 0:b74591d5ab33 6 * \author Adriaan de Jong <dejong@fox-it.com>
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
be_bryan 0:b74591d5ab33 9 * SPDX-License-Identifier: Apache-2.0
be_bryan 0:b74591d5ab33 10 *
be_bryan 0:b74591d5ab33 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
be_bryan 0:b74591d5ab33 12 * not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 13 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 14 *
be_bryan 0:b74591d5ab33 15 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 16 *
be_bryan 0:b74591d5ab33 17 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
be_bryan 0:b74591d5ab33 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 20 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 21 * limitations under the License.
be_bryan 0:b74591d5ab33 22 *
be_bryan 0:b74591d5ab33 23 * This file is part of mbed TLS (https://tls.mbed.org)
be_bryan 0:b74591d5ab33 24 */
be_bryan 0:b74591d5ab33 25
be_bryan 0:b74591d5ab33 26 #if !defined(MBEDTLS_CONFIG_FILE)
be_bryan 0:b74591d5ab33 27 #include "mbedtls/config.h"
be_bryan 0:b74591d5ab33 28 #else
be_bryan 0:b74591d5ab33 29 #include MBEDTLS_CONFIG_FILE
be_bryan 0:b74591d5ab33 30 #endif
be_bryan 0:b74591d5ab33 31
be_bryan 0:b74591d5ab33 32 #if defined(MBEDTLS_MD_C)
be_bryan 0:b74591d5ab33 33
be_bryan 0:b74591d5ab33 34 #include "mbedtls/md.h"
be_bryan 0:b74591d5ab33 35 #include "mbedtls/md_internal.h"
be_bryan 0:b74591d5ab33 36
be_bryan 0:b74591d5ab33 37 #if defined(MBEDTLS_PLATFORM_C)
be_bryan 0:b74591d5ab33 38 #include "mbedtls/platform.h"
be_bryan 0:b74591d5ab33 39 #else
be_bryan 0:b74591d5ab33 40 #include <stdlib.h>
be_bryan 0:b74591d5ab33 41 #define mbedtls_calloc calloc
be_bryan 0:b74591d5ab33 42 #define mbedtls_free free
be_bryan 0:b74591d5ab33 43 #endif
be_bryan 0:b74591d5ab33 44
be_bryan 0:b74591d5ab33 45 #include <string.h>
be_bryan 0:b74591d5ab33 46
be_bryan 0:b74591d5ab33 47 #if defined(MBEDTLS_FS_IO)
be_bryan 0:b74591d5ab33 48 #include <stdio.h>
be_bryan 0:b74591d5ab33 49 #endif
be_bryan 0:b74591d5ab33 50
be_bryan 0:b74591d5ab33 51 /* Implementation that should never be optimized out by the compiler */
be_bryan 0:b74591d5ab33 52 static void mbedtls_zeroize( void *v, size_t n ) {
be_bryan 0:b74591d5ab33 53 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
be_bryan 0:b74591d5ab33 54 }
be_bryan 0:b74591d5ab33 55
be_bryan 0:b74591d5ab33 56 /*
be_bryan 0:b74591d5ab33 57 * Reminder: update profiles in x509_crt.c when adding a new hash!
be_bryan 0:b74591d5ab33 58 */
be_bryan 0:b74591d5ab33 59 static const int supported_digests[] = {
be_bryan 0:b74591d5ab33 60
be_bryan 0:b74591d5ab33 61 #if defined(MBEDTLS_SHA512_C)
be_bryan 0:b74591d5ab33 62 MBEDTLS_MD_SHA512,
be_bryan 0:b74591d5ab33 63 MBEDTLS_MD_SHA384,
be_bryan 0:b74591d5ab33 64 #endif
be_bryan 0:b74591d5ab33 65
be_bryan 0:b74591d5ab33 66 #if defined(MBEDTLS_SHA256_C)
be_bryan 0:b74591d5ab33 67 MBEDTLS_MD_SHA256,
be_bryan 0:b74591d5ab33 68 MBEDTLS_MD_SHA224,
be_bryan 0:b74591d5ab33 69 #endif
be_bryan 0:b74591d5ab33 70
be_bryan 0:b74591d5ab33 71 #if defined(MBEDTLS_SHA1_C)
be_bryan 0:b74591d5ab33 72 MBEDTLS_MD_SHA1,
be_bryan 0:b74591d5ab33 73 #endif
be_bryan 0:b74591d5ab33 74
be_bryan 0:b74591d5ab33 75 #if defined(MBEDTLS_RIPEMD160_C)
be_bryan 0:b74591d5ab33 76 MBEDTLS_MD_RIPEMD160,
be_bryan 0:b74591d5ab33 77 #endif
be_bryan 0:b74591d5ab33 78
be_bryan 0:b74591d5ab33 79 #if defined(MBEDTLS_MD5_C)
be_bryan 0:b74591d5ab33 80 MBEDTLS_MD_MD5,
be_bryan 0:b74591d5ab33 81 #endif
be_bryan 0:b74591d5ab33 82
be_bryan 0:b74591d5ab33 83 #if defined(MBEDTLS_MD4_C)
be_bryan 0:b74591d5ab33 84 MBEDTLS_MD_MD4,
be_bryan 0:b74591d5ab33 85 #endif
be_bryan 0:b74591d5ab33 86
be_bryan 0:b74591d5ab33 87 #if defined(MBEDTLS_MD2_C)
be_bryan 0:b74591d5ab33 88 MBEDTLS_MD_MD2,
be_bryan 0:b74591d5ab33 89 #endif
be_bryan 0:b74591d5ab33 90
be_bryan 0:b74591d5ab33 91 MBEDTLS_MD_NONE
be_bryan 0:b74591d5ab33 92 };
be_bryan 0:b74591d5ab33 93
be_bryan 0:b74591d5ab33 94 const int *mbedtls_md_list( void )
be_bryan 0:b74591d5ab33 95 {
be_bryan 0:b74591d5ab33 96 return( supported_digests );
be_bryan 0:b74591d5ab33 97 }
be_bryan 0:b74591d5ab33 98
be_bryan 0:b74591d5ab33 99 const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
be_bryan 0:b74591d5ab33 100 {
be_bryan 0:b74591d5ab33 101 if( NULL == md_name )
be_bryan 0:b74591d5ab33 102 return( NULL );
be_bryan 0:b74591d5ab33 103
be_bryan 0:b74591d5ab33 104 /* Get the appropriate digest information */
be_bryan 0:b74591d5ab33 105 #if defined(MBEDTLS_MD2_C)
be_bryan 0:b74591d5ab33 106 if( !strcmp( "MD2", md_name ) )
be_bryan 0:b74591d5ab33 107 return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 );
be_bryan 0:b74591d5ab33 108 #endif
be_bryan 0:b74591d5ab33 109 #if defined(MBEDTLS_MD4_C)
be_bryan 0:b74591d5ab33 110 if( !strcmp( "MD4", md_name ) )
be_bryan 0:b74591d5ab33 111 return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 );
be_bryan 0:b74591d5ab33 112 #endif
be_bryan 0:b74591d5ab33 113 #if defined(MBEDTLS_MD5_C)
be_bryan 0:b74591d5ab33 114 if( !strcmp( "MD5", md_name ) )
be_bryan 0:b74591d5ab33 115 return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
be_bryan 0:b74591d5ab33 116 #endif
be_bryan 0:b74591d5ab33 117 #if defined(MBEDTLS_RIPEMD160_C)
be_bryan 0:b74591d5ab33 118 if( !strcmp( "RIPEMD160", md_name ) )
be_bryan 0:b74591d5ab33 119 return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
be_bryan 0:b74591d5ab33 120 #endif
be_bryan 0:b74591d5ab33 121 #if defined(MBEDTLS_SHA1_C)
be_bryan 0:b74591d5ab33 122 if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
be_bryan 0:b74591d5ab33 123 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
be_bryan 0:b74591d5ab33 124 #endif
be_bryan 0:b74591d5ab33 125 #if defined(MBEDTLS_SHA256_C)
be_bryan 0:b74591d5ab33 126 if( !strcmp( "SHA224", md_name ) )
be_bryan 0:b74591d5ab33 127 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
be_bryan 0:b74591d5ab33 128 if( !strcmp( "SHA256", md_name ) )
be_bryan 0:b74591d5ab33 129 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
be_bryan 0:b74591d5ab33 130 #endif
be_bryan 0:b74591d5ab33 131 #if defined(MBEDTLS_SHA512_C)
be_bryan 0:b74591d5ab33 132 if( !strcmp( "SHA384", md_name ) )
be_bryan 0:b74591d5ab33 133 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
be_bryan 0:b74591d5ab33 134 if( !strcmp( "SHA512", md_name ) )
be_bryan 0:b74591d5ab33 135 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
be_bryan 0:b74591d5ab33 136 #endif
be_bryan 0:b74591d5ab33 137 return( NULL );
be_bryan 0:b74591d5ab33 138 }
be_bryan 0:b74591d5ab33 139
be_bryan 0:b74591d5ab33 140 const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
be_bryan 0:b74591d5ab33 141 {
be_bryan 0:b74591d5ab33 142 switch( md_type )
be_bryan 0:b74591d5ab33 143 {
be_bryan 0:b74591d5ab33 144 #if defined(MBEDTLS_MD2_C)
be_bryan 0:b74591d5ab33 145 case MBEDTLS_MD_MD2:
be_bryan 0:b74591d5ab33 146 return( &mbedtls_md2_info );
be_bryan 0:b74591d5ab33 147 #endif
be_bryan 0:b74591d5ab33 148 #if defined(MBEDTLS_MD4_C)
be_bryan 0:b74591d5ab33 149 case MBEDTLS_MD_MD4:
be_bryan 0:b74591d5ab33 150 return( &mbedtls_md4_info );
be_bryan 0:b74591d5ab33 151 #endif
be_bryan 0:b74591d5ab33 152 #if defined(MBEDTLS_MD5_C)
be_bryan 0:b74591d5ab33 153 case MBEDTLS_MD_MD5:
be_bryan 0:b74591d5ab33 154 return( &mbedtls_md5_info );
be_bryan 0:b74591d5ab33 155 #endif
be_bryan 0:b74591d5ab33 156 #if defined(MBEDTLS_RIPEMD160_C)
be_bryan 0:b74591d5ab33 157 case MBEDTLS_MD_RIPEMD160:
be_bryan 0:b74591d5ab33 158 return( &mbedtls_ripemd160_info );
be_bryan 0:b74591d5ab33 159 #endif
be_bryan 0:b74591d5ab33 160 #if defined(MBEDTLS_SHA1_C)
be_bryan 0:b74591d5ab33 161 case MBEDTLS_MD_SHA1:
be_bryan 0:b74591d5ab33 162 return( &mbedtls_sha1_info );
be_bryan 0:b74591d5ab33 163 #endif
be_bryan 0:b74591d5ab33 164 #if defined(MBEDTLS_SHA256_C)
be_bryan 0:b74591d5ab33 165 case MBEDTLS_MD_SHA224:
be_bryan 0:b74591d5ab33 166 return( &mbedtls_sha224_info );
be_bryan 0:b74591d5ab33 167 case MBEDTLS_MD_SHA256:
be_bryan 0:b74591d5ab33 168 return( &mbedtls_sha256_info );
be_bryan 0:b74591d5ab33 169 #endif
be_bryan 0:b74591d5ab33 170 #if defined(MBEDTLS_SHA512_C)
be_bryan 0:b74591d5ab33 171 case MBEDTLS_MD_SHA384:
be_bryan 0:b74591d5ab33 172 return( &mbedtls_sha384_info );
be_bryan 0:b74591d5ab33 173 case MBEDTLS_MD_SHA512:
be_bryan 0:b74591d5ab33 174 return( &mbedtls_sha512_info );
be_bryan 0:b74591d5ab33 175 #endif
be_bryan 0:b74591d5ab33 176 default:
be_bryan 0:b74591d5ab33 177 return( NULL );
be_bryan 0:b74591d5ab33 178 }
be_bryan 0:b74591d5ab33 179 }
be_bryan 0:b74591d5ab33 180
be_bryan 0:b74591d5ab33 181 void mbedtls_md_init( mbedtls_md_context_t *ctx )
be_bryan 0:b74591d5ab33 182 {
be_bryan 0:b74591d5ab33 183 memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
be_bryan 0:b74591d5ab33 184 }
be_bryan 0:b74591d5ab33 185
be_bryan 0:b74591d5ab33 186 void mbedtls_md_free( mbedtls_md_context_t *ctx )
be_bryan 0:b74591d5ab33 187 {
be_bryan 0:b74591d5ab33 188 if( ctx == NULL || ctx->md_info == NULL )
be_bryan 0:b74591d5ab33 189 return;
be_bryan 0:b74591d5ab33 190
be_bryan 0:b74591d5ab33 191 if( ctx->md_ctx != NULL )
be_bryan 0:b74591d5ab33 192 ctx->md_info->ctx_free_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 193
be_bryan 0:b74591d5ab33 194 if( ctx->hmac_ctx != NULL )
be_bryan 0:b74591d5ab33 195 {
be_bryan 0:b74591d5ab33 196 mbedtls_zeroize( ctx->hmac_ctx, 2 * ctx->md_info->block_size );
be_bryan 0:b74591d5ab33 197 mbedtls_free( ctx->hmac_ctx );
be_bryan 0:b74591d5ab33 198 }
be_bryan 0:b74591d5ab33 199
be_bryan 0:b74591d5ab33 200 mbedtls_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
be_bryan 0:b74591d5ab33 201 }
be_bryan 0:b74591d5ab33 202
be_bryan 0:b74591d5ab33 203 int mbedtls_md_clone( mbedtls_md_context_t *dst,
be_bryan 0:b74591d5ab33 204 const mbedtls_md_context_t *src )
be_bryan 0:b74591d5ab33 205 {
be_bryan 0:b74591d5ab33 206 if( dst == NULL || dst->md_info == NULL ||
be_bryan 0:b74591d5ab33 207 src == NULL || src->md_info == NULL ||
be_bryan 0:b74591d5ab33 208 dst->md_info != src->md_info )
be_bryan 0:b74591d5ab33 209 {
be_bryan 0:b74591d5ab33 210 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 211 }
be_bryan 0:b74591d5ab33 212
be_bryan 0:b74591d5ab33 213 dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
be_bryan 0:b74591d5ab33 214
be_bryan 0:b74591d5ab33 215 return( 0 );
be_bryan 0:b74591d5ab33 216 }
be_bryan 0:b74591d5ab33 217
be_bryan 0:b74591d5ab33 218 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
be_bryan 0:b74591d5ab33 219 int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
be_bryan 0:b74591d5ab33 220 {
be_bryan 0:b74591d5ab33 221 return mbedtls_md_setup( ctx, md_info, 1 );
be_bryan 0:b74591d5ab33 222 }
be_bryan 0:b74591d5ab33 223 #endif
be_bryan 0:b74591d5ab33 224
be_bryan 0:b74591d5ab33 225 int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
be_bryan 0:b74591d5ab33 226 {
be_bryan 0:b74591d5ab33 227 if( md_info == NULL || ctx == NULL )
be_bryan 0:b74591d5ab33 228 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 229
be_bryan 0:b74591d5ab33 230 if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
be_bryan 0:b74591d5ab33 231 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
be_bryan 0:b74591d5ab33 232
be_bryan 0:b74591d5ab33 233 if( hmac != 0 )
be_bryan 0:b74591d5ab33 234 {
be_bryan 0:b74591d5ab33 235 ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
be_bryan 0:b74591d5ab33 236 if( ctx->hmac_ctx == NULL )
be_bryan 0:b74591d5ab33 237 {
be_bryan 0:b74591d5ab33 238 md_info->ctx_free_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 239 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
be_bryan 0:b74591d5ab33 240 }
be_bryan 0:b74591d5ab33 241 }
be_bryan 0:b74591d5ab33 242
be_bryan 0:b74591d5ab33 243 ctx->md_info = md_info;
be_bryan 0:b74591d5ab33 244
be_bryan 0:b74591d5ab33 245 return( 0 );
be_bryan 0:b74591d5ab33 246 }
be_bryan 0:b74591d5ab33 247
be_bryan 0:b74591d5ab33 248 int mbedtls_md_starts( mbedtls_md_context_t *ctx )
be_bryan 0:b74591d5ab33 249 {
be_bryan 0:b74591d5ab33 250 if( ctx == NULL || ctx->md_info == NULL )
be_bryan 0:b74591d5ab33 251 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 252
be_bryan 0:b74591d5ab33 253 ctx->md_info->starts_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 254
be_bryan 0:b74591d5ab33 255 return( 0 );
be_bryan 0:b74591d5ab33 256 }
be_bryan 0:b74591d5ab33 257
be_bryan 0:b74591d5ab33 258 int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
be_bryan 0:b74591d5ab33 259 {
be_bryan 0:b74591d5ab33 260 if( ctx == NULL || ctx->md_info == NULL )
be_bryan 0:b74591d5ab33 261 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 262
be_bryan 0:b74591d5ab33 263 ctx->md_info->update_func( ctx->md_ctx, input, ilen );
be_bryan 0:b74591d5ab33 264
be_bryan 0:b74591d5ab33 265 return( 0 );
be_bryan 0:b74591d5ab33 266 }
be_bryan 0:b74591d5ab33 267
be_bryan 0:b74591d5ab33 268 int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
be_bryan 0:b74591d5ab33 269 {
be_bryan 0:b74591d5ab33 270 if( ctx == NULL || ctx->md_info == NULL )
be_bryan 0:b74591d5ab33 271 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 272
be_bryan 0:b74591d5ab33 273 ctx->md_info->finish_func( ctx->md_ctx, output );
be_bryan 0:b74591d5ab33 274
be_bryan 0:b74591d5ab33 275 return( 0 );
be_bryan 0:b74591d5ab33 276 }
be_bryan 0:b74591d5ab33 277
be_bryan 0:b74591d5ab33 278 int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
be_bryan 0:b74591d5ab33 279 unsigned char *output )
be_bryan 0:b74591d5ab33 280 {
be_bryan 0:b74591d5ab33 281 if( md_info == NULL )
be_bryan 0:b74591d5ab33 282 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 283
be_bryan 0:b74591d5ab33 284 md_info->digest_func( input, ilen, output );
be_bryan 0:b74591d5ab33 285
be_bryan 0:b74591d5ab33 286 return( 0 );
be_bryan 0:b74591d5ab33 287 }
be_bryan 0:b74591d5ab33 288
be_bryan 0:b74591d5ab33 289 #if defined(MBEDTLS_FS_IO)
be_bryan 0:b74591d5ab33 290 int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
be_bryan 0:b74591d5ab33 291 {
be_bryan 0:b74591d5ab33 292 int ret;
be_bryan 0:b74591d5ab33 293 FILE *f;
be_bryan 0:b74591d5ab33 294 size_t n;
be_bryan 0:b74591d5ab33 295 mbedtls_md_context_t ctx;
be_bryan 0:b74591d5ab33 296 unsigned char buf[1024];
be_bryan 0:b74591d5ab33 297
be_bryan 0:b74591d5ab33 298 if( md_info == NULL )
be_bryan 0:b74591d5ab33 299 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 300
be_bryan 0:b74591d5ab33 301 if( ( f = fopen( path, "rb" ) ) == NULL )
be_bryan 0:b74591d5ab33 302 return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
be_bryan 0:b74591d5ab33 303
be_bryan 0:b74591d5ab33 304 mbedtls_md_init( &ctx );
be_bryan 0:b74591d5ab33 305
be_bryan 0:b74591d5ab33 306 if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
be_bryan 0:b74591d5ab33 307 goto cleanup;
be_bryan 0:b74591d5ab33 308
be_bryan 0:b74591d5ab33 309 md_info->starts_func( ctx.md_ctx );
be_bryan 0:b74591d5ab33 310
be_bryan 0:b74591d5ab33 311 while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
be_bryan 0:b74591d5ab33 312 md_info->update_func( ctx.md_ctx, buf, n );
be_bryan 0:b74591d5ab33 313
be_bryan 0:b74591d5ab33 314 if( ferror( f ) != 0 )
be_bryan 0:b74591d5ab33 315 {
be_bryan 0:b74591d5ab33 316 ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
be_bryan 0:b74591d5ab33 317 goto cleanup;
be_bryan 0:b74591d5ab33 318 }
be_bryan 0:b74591d5ab33 319
be_bryan 0:b74591d5ab33 320 md_info->finish_func( ctx.md_ctx, output );
be_bryan 0:b74591d5ab33 321
be_bryan 0:b74591d5ab33 322 cleanup:
be_bryan 0:b74591d5ab33 323 fclose( f );
be_bryan 0:b74591d5ab33 324 mbedtls_md_free( &ctx );
be_bryan 0:b74591d5ab33 325
be_bryan 0:b74591d5ab33 326 return( ret );
be_bryan 0:b74591d5ab33 327 }
be_bryan 0:b74591d5ab33 328 #endif /* MBEDTLS_FS_IO */
be_bryan 0:b74591d5ab33 329
be_bryan 0:b74591d5ab33 330 int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
be_bryan 0:b74591d5ab33 331 {
be_bryan 0:b74591d5ab33 332 unsigned char sum[MBEDTLS_MD_MAX_SIZE];
be_bryan 0:b74591d5ab33 333 unsigned char *ipad, *opad;
be_bryan 0:b74591d5ab33 334 size_t i;
be_bryan 0:b74591d5ab33 335
be_bryan 0:b74591d5ab33 336 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
be_bryan 0:b74591d5ab33 337 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 338
be_bryan 0:b74591d5ab33 339 if( keylen > (size_t) ctx->md_info->block_size )
be_bryan 0:b74591d5ab33 340 {
be_bryan 0:b74591d5ab33 341 ctx->md_info->starts_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 342 ctx->md_info->update_func( ctx->md_ctx, key, keylen );
be_bryan 0:b74591d5ab33 343 ctx->md_info->finish_func( ctx->md_ctx, sum );
be_bryan 0:b74591d5ab33 344
be_bryan 0:b74591d5ab33 345 keylen = ctx->md_info->size;
be_bryan 0:b74591d5ab33 346 key = sum;
be_bryan 0:b74591d5ab33 347 }
be_bryan 0:b74591d5ab33 348
be_bryan 0:b74591d5ab33 349 ipad = (unsigned char *) ctx->hmac_ctx;
be_bryan 0:b74591d5ab33 350 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
be_bryan 0:b74591d5ab33 351
be_bryan 0:b74591d5ab33 352 memset( ipad, 0x36, ctx->md_info->block_size );
be_bryan 0:b74591d5ab33 353 memset( opad, 0x5C, ctx->md_info->block_size );
be_bryan 0:b74591d5ab33 354
be_bryan 0:b74591d5ab33 355 for( i = 0; i < keylen; i++ )
be_bryan 0:b74591d5ab33 356 {
be_bryan 0:b74591d5ab33 357 ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
be_bryan 0:b74591d5ab33 358 opad[i] = (unsigned char)( opad[i] ^ key[i] );
be_bryan 0:b74591d5ab33 359 }
be_bryan 0:b74591d5ab33 360
be_bryan 0:b74591d5ab33 361 mbedtls_zeroize( sum, sizeof( sum ) );
be_bryan 0:b74591d5ab33 362
be_bryan 0:b74591d5ab33 363 ctx->md_info->starts_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 364 ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
be_bryan 0:b74591d5ab33 365
be_bryan 0:b74591d5ab33 366 return( 0 );
be_bryan 0:b74591d5ab33 367 }
be_bryan 0:b74591d5ab33 368
be_bryan 0:b74591d5ab33 369 int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
be_bryan 0:b74591d5ab33 370 {
be_bryan 0:b74591d5ab33 371 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
be_bryan 0:b74591d5ab33 372 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 373
be_bryan 0:b74591d5ab33 374 ctx->md_info->update_func( ctx->md_ctx, input, ilen );
be_bryan 0:b74591d5ab33 375
be_bryan 0:b74591d5ab33 376 return( 0 );
be_bryan 0:b74591d5ab33 377 }
be_bryan 0:b74591d5ab33 378
be_bryan 0:b74591d5ab33 379 int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
be_bryan 0:b74591d5ab33 380 {
be_bryan 0:b74591d5ab33 381 unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
be_bryan 0:b74591d5ab33 382 unsigned char *opad;
be_bryan 0:b74591d5ab33 383
be_bryan 0:b74591d5ab33 384 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
be_bryan 0:b74591d5ab33 385 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 386
be_bryan 0:b74591d5ab33 387 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
be_bryan 0:b74591d5ab33 388
be_bryan 0:b74591d5ab33 389 ctx->md_info->finish_func( ctx->md_ctx, tmp );
be_bryan 0:b74591d5ab33 390 ctx->md_info->starts_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 391 ctx->md_info->update_func( ctx->md_ctx, opad, ctx->md_info->block_size );
be_bryan 0:b74591d5ab33 392 ctx->md_info->update_func( ctx->md_ctx, tmp, ctx->md_info->size );
be_bryan 0:b74591d5ab33 393 ctx->md_info->finish_func( ctx->md_ctx, output );
be_bryan 0:b74591d5ab33 394
be_bryan 0:b74591d5ab33 395 return( 0 );
be_bryan 0:b74591d5ab33 396 }
be_bryan 0:b74591d5ab33 397
be_bryan 0:b74591d5ab33 398 int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
be_bryan 0:b74591d5ab33 399 {
be_bryan 0:b74591d5ab33 400 unsigned char *ipad;
be_bryan 0:b74591d5ab33 401
be_bryan 0:b74591d5ab33 402 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
be_bryan 0:b74591d5ab33 403 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 404
be_bryan 0:b74591d5ab33 405 ipad = (unsigned char *) ctx->hmac_ctx;
be_bryan 0:b74591d5ab33 406
be_bryan 0:b74591d5ab33 407 ctx->md_info->starts_func( ctx->md_ctx );
be_bryan 0:b74591d5ab33 408 ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
be_bryan 0:b74591d5ab33 409
be_bryan 0:b74591d5ab33 410 return( 0 );
be_bryan 0:b74591d5ab33 411 }
be_bryan 0:b74591d5ab33 412
be_bryan 0:b74591d5ab33 413 int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
be_bryan 0:b74591d5ab33 414 const unsigned char *input, size_t ilen,
be_bryan 0:b74591d5ab33 415 unsigned char *output )
be_bryan 0:b74591d5ab33 416 {
be_bryan 0:b74591d5ab33 417 mbedtls_md_context_t ctx;
be_bryan 0:b74591d5ab33 418 int ret;
be_bryan 0:b74591d5ab33 419
be_bryan 0:b74591d5ab33 420 if( md_info == NULL )
be_bryan 0:b74591d5ab33 421 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 422
be_bryan 0:b74591d5ab33 423 mbedtls_md_init( &ctx );
be_bryan 0:b74591d5ab33 424
be_bryan 0:b74591d5ab33 425 if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
be_bryan 0:b74591d5ab33 426 return( ret );
be_bryan 0:b74591d5ab33 427
be_bryan 0:b74591d5ab33 428 mbedtls_md_hmac_starts( &ctx, key, keylen );
be_bryan 0:b74591d5ab33 429 mbedtls_md_hmac_update( &ctx, input, ilen );
be_bryan 0:b74591d5ab33 430 mbedtls_md_hmac_finish( &ctx, output );
be_bryan 0:b74591d5ab33 431
be_bryan 0:b74591d5ab33 432 mbedtls_md_free( &ctx );
be_bryan 0:b74591d5ab33 433
be_bryan 0:b74591d5ab33 434 return( 0 );
be_bryan 0:b74591d5ab33 435 }
be_bryan 0:b74591d5ab33 436
be_bryan 0:b74591d5ab33 437 int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
be_bryan 0:b74591d5ab33 438 {
be_bryan 0:b74591d5ab33 439 if( ctx == NULL || ctx->md_info == NULL )
be_bryan 0:b74591d5ab33 440 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 441
be_bryan 0:b74591d5ab33 442 ctx->md_info->process_func( ctx->md_ctx, data );
be_bryan 0:b74591d5ab33 443
be_bryan 0:b74591d5ab33 444 return( 0 );
be_bryan 0:b74591d5ab33 445 }
be_bryan 0:b74591d5ab33 446
be_bryan 0:b74591d5ab33 447 unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
be_bryan 0:b74591d5ab33 448 {
be_bryan 0:b74591d5ab33 449 if( md_info == NULL )
be_bryan 0:b74591d5ab33 450 return( 0 );
be_bryan 0:b74591d5ab33 451
be_bryan 0:b74591d5ab33 452 return md_info->size;
be_bryan 0:b74591d5ab33 453 }
be_bryan 0:b74591d5ab33 454
be_bryan 0:b74591d5ab33 455 mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
be_bryan 0:b74591d5ab33 456 {
be_bryan 0:b74591d5ab33 457 if( md_info == NULL )
be_bryan 0:b74591d5ab33 458 return( MBEDTLS_MD_NONE );
be_bryan 0:b74591d5ab33 459
be_bryan 0:b74591d5ab33 460 return md_info->type;
be_bryan 0:b74591d5ab33 461 }
be_bryan 0:b74591d5ab33 462
be_bryan 0:b74591d5ab33 463 const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
be_bryan 0:b74591d5ab33 464 {
be_bryan 0:b74591d5ab33 465 if( md_info == NULL )
be_bryan 0:b74591d5ab33 466 return( NULL );
be_bryan 0:b74591d5ab33 467
be_bryan 0:b74591d5ab33 468 return md_info->name;
be_bryan 0:b74591d5ab33 469 }
be_bryan 0:b74591d5ab33 470
be_bryan 0:b74591d5ab33 471 #endif /* MBEDTLS_MD_C */