Eric Tsai / mbedtls

Modified mbed TLS headers for AES functionality only to reduce build size

Dependents:   BLE_Gateway_Linker_fix BLE_Gateway

Fork of mbedtls by sandbox

source/md.c@1:24750b9ad5ef, 2016-01-22 (annotated)

Committer:
Christopher Haster
Date:
Fri Jan 22 16:44:49 2016 -0600
Revision:
1:24750b9ad5ef
Initial move of mbedtls to mercurial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Christopher Haster 1:24750b9ad5ef 1 /**
Christopher Haster 1:24750b9ad5ef 2 * \file mbedtls_md.c
Christopher Haster 1:24750b9ad5ef 3 *
Christopher Haster 1:24750b9ad5ef 4 * \brief Generic message digest wrapper for mbed TLS
Christopher Haster 1:24750b9ad5ef 5 *
Christopher Haster 1:24750b9ad5ef 6 * \author Adriaan de Jong <dejong@fox-it.com>
Christopher Haster 1:24750b9ad5ef 7 *
Christopher Haster 1:24750b9ad5ef 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
Christopher Haster 1:24750b9ad5ef 9 * SPDX-License-Identifier: Apache-2.0
Christopher Haster 1:24750b9ad5ef 10 *
Christopher Haster 1:24750b9ad5ef 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Christopher Haster 1:24750b9ad5ef 12 * not use this file except in compliance with the License.
Christopher Haster 1:24750b9ad5ef 13 * You may obtain a copy of the License at
Christopher Haster 1:24750b9ad5ef 14 *
Christopher Haster 1:24750b9ad5ef 15 * http://www.apache.org/licenses/LICENSE-2.0
Christopher Haster 1:24750b9ad5ef 16 *
Christopher Haster 1:24750b9ad5ef 17 * Unless required by applicable law or agreed to in writing, software
Christopher Haster 1:24750b9ad5ef 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Christopher Haster 1:24750b9ad5ef 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Christopher Haster 1:24750b9ad5ef 20 * See the License for the specific language governing permissions and
Christopher Haster 1:24750b9ad5ef 21 * limitations under the License.
Christopher Haster 1:24750b9ad5ef 22 *
Christopher Haster 1:24750b9ad5ef 23 * This file is part of mbed TLS (https://tls.mbed.org)
Christopher Haster 1:24750b9ad5ef 24 */
Christopher Haster 1:24750b9ad5ef 25
Christopher Haster 1:24750b9ad5ef 26 #if !defined(MBEDTLS_CONFIG_FILE)
Christopher Haster 1:24750b9ad5ef 27 #include "mbedtls/config.h"
Christopher Haster 1:24750b9ad5ef 28 #else
Christopher Haster 1:24750b9ad5ef 29 #include MBEDTLS_CONFIG_FILE
Christopher Haster 1:24750b9ad5ef 30 #endif
Christopher Haster 1:24750b9ad5ef 31
Christopher Haster 1:24750b9ad5ef 32 #if defined(MBEDTLS_MD_C)
Christopher Haster 1:24750b9ad5ef 33
Christopher Haster 1:24750b9ad5ef 34 #include "mbedtls/md.h"
Christopher Haster 1:24750b9ad5ef 35 #include "mbedtls/md_internal.h"
Christopher Haster 1:24750b9ad5ef 36
Christopher Haster 1:24750b9ad5ef 37 #if defined(MBEDTLS_PLATFORM_C)
Christopher Haster 1:24750b9ad5ef 38 #include "mbedtls/platform.h"
Christopher Haster 1:24750b9ad5ef 39 #else
Christopher Haster 1:24750b9ad5ef 40 #include <stdlib.h>
Christopher Haster 1:24750b9ad5ef 41 #define mbedtls_calloc calloc
Christopher Haster 1:24750b9ad5ef 42 #define mbedtls_free free
Christopher Haster 1:24750b9ad5ef 43 #endif
Christopher Haster 1:24750b9ad5ef 44
Christopher Haster 1:24750b9ad5ef 45 #include <string.h>
Christopher Haster 1:24750b9ad5ef 46
Christopher Haster 1:24750b9ad5ef 47 #if defined(MBEDTLS_FS_IO)
Christopher Haster 1:24750b9ad5ef 48 #include <stdio.h>
Christopher Haster 1:24750b9ad5ef 49 #endif
Christopher Haster 1:24750b9ad5ef 50
Christopher Haster 1:24750b9ad5ef 51 /* Implementation that should never be optimized out by the compiler */
Christopher Haster 1:24750b9ad5ef 52 static void mbedtls_zeroize( void *v, size_t n ) {
Christopher Haster 1:24750b9ad5ef 53 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
Christopher Haster 1:24750b9ad5ef 54 }
Christopher Haster 1:24750b9ad5ef 55
Christopher Haster 1:24750b9ad5ef 56 /*
Christopher Haster 1:24750b9ad5ef 57 * Reminder: update profiles in x509_crt.c when adding a new hash!
Christopher Haster 1:24750b9ad5ef 58 */
Christopher Haster 1:24750b9ad5ef 59 static const int supported_digests[] = {
Christopher Haster 1:24750b9ad5ef 60
Christopher Haster 1:24750b9ad5ef 61 #if defined(MBEDTLS_SHA512_C)
Christopher Haster 1:24750b9ad5ef 62 MBEDTLS_MD_SHA512,
Christopher Haster 1:24750b9ad5ef 63 MBEDTLS_MD_SHA384,
Christopher Haster 1:24750b9ad5ef 64 #endif
Christopher Haster 1:24750b9ad5ef 65
Christopher Haster 1:24750b9ad5ef 66 #if defined(MBEDTLS_SHA256_C)
Christopher Haster 1:24750b9ad5ef 67 MBEDTLS_MD_SHA256,
Christopher Haster 1:24750b9ad5ef 68 MBEDTLS_MD_SHA224,
Christopher Haster 1:24750b9ad5ef 69 #endif
Christopher Haster 1:24750b9ad5ef 70
Christopher Haster 1:24750b9ad5ef 71 #if defined(MBEDTLS_SHA1_C)
Christopher Haster 1:24750b9ad5ef 72 MBEDTLS_MD_SHA1,
Christopher Haster 1:24750b9ad5ef 73 #endif
Christopher Haster 1:24750b9ad5ef 74
Christopher Haster 1:24750b9ad5ef 75 #if defined(MBEDTLS_RIPEMD160_C)
Christopher Haster 1:24750b9ad5ef 76 MBEDTLS_MD_RIPEMD160,
Christopher Haster 1:24750b9ad5ef 77 #endif
Christopher Haster 1:24750b9ad5ef 78
Christopher Haster 1:24750b9ad5ef 79 #if defined(MBEDTLS_MD5_C)
Christopher Haster 1:24750b9ad5ef 80 MBEDTLS_MD_MD5,
Christopher Haster 1:24750b9ad5ef 81 #endif
Christopher Haster 1:24750b9ad5ef 82
Christopher Haster 1:24750b9ad5ef 83 #if defined(MBEDTLS_MD4_C)
Christopher Haster 1:24750b9ad5ef 84 MBEDTLS_MD_MD4,
Christopher Haster 1:24750b9ad5ef 85 #endif
Christopher Haster 1:24750b9ad5ef 86
Christopher Haster 1:24750b9ad5ef 87 #if defined(MBEDTLS_MD2_C)
Christopher Haster 1:24750b9ad5ef 88 MBEDTLS_MD_MD2,
Christopher Haster 1:24750b9ad5ef 89 #endif
Christopher Haster 1:24750b9ad5ef 90
Christopher Haster 1:24750b9ad5ef 91 MBEDTLS_MD_NONE
Christopher Haster 1:24750b9ad5ef 92 };
Christopher Haster 1:24750b9ad5ef 93
Christopher Haster 1:24750b9ad5ef 94 const int *mbedtls_md_list( void )
Christopher Haster 1:24750b9ad5ef 95 {
Christopher Haster 1:24750b9ad5ef 96 return( supported_digests );
Christopher Haster 1:24750b9ad5ef 97 }
Christopher Haster 1:24750b9ad5ef 98
Christopher Haster 1:24750b9ad5ef 99 const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
Christopher Haster 1:24750b9ad5ef 100 {
Christopher Haster 1:24750b9ad5ef 101 if( NULL == md_name )
Christopher Haster 1:24750b9ad5ef 102 return( NULL );
Christopher Haster 1:24750b9ad5ef 103
Christopher Haster 1:24750b9ad5ef 104 /* Get the appropriate digest information */
Christopher Haster 1:24750b9ad5ef 105 #if defined(MBEDTLS_MD2_C)
Christopher Haster 1:24750b9ad5ef 106 if( !strcmp( "MD2", md_name ) )
Christopher Haster 1:24750b9ad5ef 107 return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 );
Christopher Haster 1:24750b9ad5ef 108 #endif
Christopher Haster 1:24750b9ad5ef 109 #if defined(MBEDTLS_MD4_C)
Christopher Haster 1:24750b9ad5ef 110 if( !strcmp( "MD4", md_name ) )
Christopher Haster 1:24750b9ad5ef 111 return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 );
Christopher Haster 1:24750b9ad5ef 112 #endif
Christopher Haster 1:24750b9ad5ef 113 #if defined(MBEDTLS_MD5_C)
Christopher Haster 1:24750b9ad5ef 114 if( !strcmp( "MD5", md_name ) )
Christopher Haster 1:24750b9ad5ef 115 return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
Christopher Haster 1:24750b9ad5ef 116 #endif
Christopher Haster 1:24750b9ad5ef 117 #if defined(MBEDTLS_RIPEMD160_C)
Christopher Haster 1:24750b9ad5ef 118 if( !strcmp( "RIPEMD160", md_name ) )
Christopher Haster 1:24750b9ad5ef 119 return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
Christopher Haster 1:24750b9ad5ef 120 #endif
Christopher Haster 1:24750b9ad5ef 121 #if defined(MBEDTLS_SHA1_C)
Christopher Haster 1:24750b9ad5ef 122 if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
Christopher Haster 1:24750b9ad5ef 123 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
Christopher Haster 1:24750b9ad5ef 124 #endif
Christopher Haster 1:24750b9ad5ef 125 #if defined(MBEDTLS_SHA256_C)
Christopher Haster 1:24750b9ad5ef 126 if( !strcmp( "SHA224", md_name ) )
Christopher Haster 1:24750b9ad5ef 127 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
Christopher Haster 1:24750b9ad5ef 128 if( !strcmp( "SHA256", md_name ) )
Christopher Haster 1:24750b9ad5ef 129 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
Christopher Haster 1:24750b9ad5ef 130 #endif
Christopher Haster 1:24750b9ad5ef 131 #if defined(MBEDTLS_SHA512_C)
Christopher Haster 1:24750b9ad5ef 132 if( !strcmp( "SHA384", md_name ) )
Christopher Haster 1:24750b9ad5ef 133 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
Christopher Haster 1:24750b9ad5ef 134 if( !strcmp( "SHA512", md_name ) )
Christopher Haster 1:24750b9ad5ef 135 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
Christopher Haster 1:24750b9ad5ef 136 #endif
Christopher Haster 1:24750b9ad5ef 137 return( NULL );
Christopher Haster 1:24750b9ad5ef 138 }
Christopher Haster 1:24750b9ad5ef 139
Christopher Haster 1:24750b9ad5ef 140 const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
Christopher Haster 1:24750b9ad5ef 141 {
Christopher Haster 1:24750b9ad5ef 142 switch( md_type )
Christopher Haster 1:24750b9ad5ef 143 {
Christopher Haster 1:24750b9ad5ef 144 #if defined(MBEDTLS_MD2_C)
Christopher Haster 1:24750b9ad5ef 145 case MBEDTLS_MD_MD2:
Christopher Haster 1:24750b9ad5ef 146 return( &mbedtls_md2_info );
Christopher Haster 1:24750b9ad5ef 147 #endif
Christopher Haster 1:24750b9ad5ef 148 #if defined(MBEDTLS_MD4_C)
Christopher Haster 1:24750b9ad5ef 149 case MBEDTLS_MD_MD4:
Christopher Haster 1:24750b9ad5ef 150 return( &mbedtls_md4_info );
Christopher Haster 1:24750b9ad5ef 151 #endif
Christopher Haster 1:24750b9ad5ef 152 #if defined(MBEDTLS_MD5_C)
Christopher Haster 1:24750b9ad5ef 153 case MBEDTLS_MD_MD5:
Christopher Haster 1:24750b9ad5ef 154 return( &mbedtls_md5_info );
Christopher Haster 1:24750b9ad5ef 155 #endif
Christopher Haster 1:24750b9ad5ef 156 #if defined(MBEDTLS_RIPEMD160_C)
Christopher Haster 1:24750b9ad5ef 157 case MBEDTLS_MD_RIPEMD160:
Christopher Haster 1:24750b9ad5ef 158 return( &mbedtls_ripemd160_info );
Christopher Haster 1:24750b9ad5ef 159 #endif
Christopher Haster 1:24750b9ad5ef 160 #if defined(MBEDTLS_SHA1_C)
Christopher Haster 1:24750b9ad5ef 161 case MBEDTLS_MD_SHA1:
Christopher Haster 1:24750b9ad5ef 162 return( &mbedtls_sha1_info );
Christopher Haster 1:24750b9ad5ef 163 #endif
Christopher Haster 1:24750b9ad5ef 164 #if defined(MBEDTLS_SHA256_C)
Christopher Haster 1:24750b9ad5ef 165 case MBEDTLS_MD_SHA224:
Christopher Haster 1:24750b9ad5ef 166 return( &mbedtls_sha224_info );
Christopher Haster 1:24750b9ad5ef 167 case MBEDTLS_MD_SHA256:
Christopher Haster 1:24750b9ad5ef 168 return( &mbedtls_sha256_info );
Christopher Haster 1:24750b9ad5ef 169 #endif
Christopher Haster 1:24750b9ad5ef 170 #if defined(MBEDTLS_SHA512_C)
Christopher Haster 1:24750b9ad5ef 171 case MBEDTLS_MD_SHA384:
Christopher Haster 1:24750b9ad5ef 172 return( &mbedtls_sha384_info );
Christopher Haster 1:24750b9ad5ef 173 case MBEDTLS_MD_SHA512:
Christopher Haster 1:24750b9ad5ef 174 return( &mbedtls_sha512_info );
Christopher Haster 1:24750b9ad5ef 175 #endif
Christopher Haster 1:24750b9ad5ef 176 default:
Christopher Haster 1:24750b9ad5ef 177 return( NULL );
Christopher Haster 1:24750b9ad5ef 178 }
Christopher Haster 1:24750b9ad5ef 179 }
Christopher Haster 1:24750b9ad5ef 180
Christopher Haster 1:24750b9ad5ef 181 void mbedtls_md_init( mbedtls_md_context_t *ctx )
Christopher Haster 1:24750b9ad5ef 182 {
Christopher Haster 1:24750b9ad5ef 183 memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
Christopher Haster 1:24750b9ad5ef 184 }
Christopher Haster 1:24750b9ad5ef 185
Christopher Haster 1:24750b9ad5ef 186 void mbedtls_md_free( mbedtls_md_context_t *ctx )
Christopher Haster 1:24750b9ad5ef 187 {
Christopher Haster 1:24750b9ad5ef 188 if( ctx == NULL || ctx->md_info == NULL )
Christopher Haster 1:24750b9ad5ef 189 return;
Christopher Haster 1:24750b9ad5ef 190
Christopher Haster 1:24750b9ad5ef 191 if( ctx->md_ctx != NULL )
Christopher Haster 1:24750b9ad5ef 192 ctx->md_info->ctx_free_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 193
Christopher Haster 1:24750b9ad5ef 194 if( ctx->hmac_ctx != NULL )
Christopher Haster 1:24750b9ad5ef 195 {
Christopher Haster 1:24750b9ad5ef 196 mbedtls_zeroize( ctx->hmac_ctx, 2 * ctx->md_info->block_size );
Christopher Haster 1:24750b9ad5ef 197 mbedtls_free( ctx->hmac_ctx );
Christopher Haster 1:24750b9ad5ef 198 }
Christopher Haster 1:24750b9ad5ef 199
Christopher Haster 1:24750b9ad5ef 200 mbedtls_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
Christopher Haster 1:24750b9ad5ef 201 }
Christopher Haster 1:24750b9ad5ef 202
Christopher Haster 1:24750b9ad5ef 203 int mbedtls_md_clone( mbedtls_md_context_t *dst,
Christopher Haster 1:24750b9ad5ef 204 const mbedtls_md_context_t *src )
Christopher Haster 1:24750b9ad5ef 205 {
Christopher Haster 1:24750b9ad5ef 206 if( dst == NULL || dst->md_info == NULL ||
Christopher Haster 1:24750b9ad5ef 207 src == NULL || src->md_info == NULL ||
Christopher Haster 1:24750b9ad5ef 208 dst->md_info != src->md_info )
Christopher Haster 1:24750b9ad5ef 209 {
Christopher Haster 1:24750b9ad5ef 210 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 211 }
Christopher Haster 1:24750b9ad5ef 212
Christopher Haster 1:24750b9ad5ef 213 dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
Christopher Haster 1:24750b9ad5ef 214
Christopher Haster 1:24750b9ad5ef 215 return( 0 );
Christopher Haster 1:24750b9ad5ef 216 }
Christopher Haster 1:24750b9ad5ef 217
Christopher Haster 1:24750b9ad5ef 218 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
Christopher Haster 1:24750b9ad5ef 219 int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
Christopher Haster 1:24750b9ad5ef 220 {
Christopher Haster 1:24750b9ad5ef 221 return mbedtls_md_setup( ctx, md_info, 1 );
Christopher Haster 1:24750b9ad5ef 222 }
Christopher Haster 1:24750b9ad5ef 223 #endif
Christopher Haster 1:24750b9ad5ef 224
Christopher Haster 1:24750b9ad5ef 225 int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
Christopher Haster 1:24750b9ad5ef 226 {
Christopher Haster 1:24750b9ad5ef 227 if( md_info == NULL || ctx == NULL )
Christopher Haster 1:24750b9ad5ef 228 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 229
Christopher Haster 1:24750b9ad5ef 230 if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
Christopher Haster 1:24750b9ad5ef 231 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
Christopher Haster 1:24750b9ad5ef 232
Christopher Haster 1:24750b9ad5ef 233 if( hmac != 0 )
Christopher Haster 1:24750b9ad5ef 234 {
Christopher Haster 1:24750b9ad5ef 235 ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
Christopher Haster 1:24750b9ad5ef 236 if( ctx->hmac_ctx == NULL )
Christopher Haster 1:24750b9ad5ef 237 {
Christopher Haster 1:24750b9ad5ef 238 md_info->ctx_free_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 239 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
Christopher Haster 1:24750b9ad5ef 240 }
Christopher Haster 1:24750b9ad5ef 241 }
Christopher Haster 1:24750b9ad5ef 242
Christopher Haster 1:24750b9ad5ef 243 ctx->md_info = md_info;
Christopher Haster 1:24750b9ad5ef 244
Christopher Haster 1:24750b9ad5ef 245 return( 0 );
Christopher Haster 1:24750b9ad5ef 246 }
Christopher Haster 1:24750b9ad5ef 247
Christopher Haster 1:24750b9ad5ef 248 int mbedtls_md_starts( mbedtls_md_context_t *ctx )
Christopher Haster 1:24750b9ad5ef 249 {
Christopher Haster 1:24750b9ad5ef 250 if( ctx == NULL || ctx->md_info == NULL )
Christopher Haster 1:24750b9ad5ef 251 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 252
Christopher Haster 1:24750b9ad5ef 253 ctx->md_info->starts_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 254
Christopher Haster 1:24750b9ad5ef 255 return( 0 );
Christopher Haster 1:24750b9ad5ef 256 }
Christopher Haster 1:24750b9ad5ef 257
Christopher Haster 1:24750b9ad5ef 258 int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
Christopher Haster 1:24750b9ad5ef 259 {
Christopher Haster 1:24750b9ad5ef 260 if( ctx == NULL || ctx->md_info == NULL )
Christopher Haster 1:24750b9ad5ef 261 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 262
Christopher Haster 1:24750b9ad5ef 263 ctx->md_info->update_func( ctx->md_ctx, input, ilen );
Christopher Haster 1:24750b9ad5ef 264
Christopher Haster 1:24750b9ad5ef 265 return( 0 );
Christopher Haster 1:24750b9ad5ef 266 }
Christopher Haster 1:24750b9ad5ef 267
Christopher Haster 1:24750b9ad5ef 268 int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
Christopher Haster 1:24750b9ad5ef 269 {
Christopher Haster 1:24750b9ad5ef 270 if( ctx == NULL || ctx->md_info == NULL )
Christopher Haster 1:24750b9ad5ef 271 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 272
Christopher Haster 1:24750b9ad5ef 273 ctx->md_info->finish_func( ctx->md_ctx, output );
Christopher Haster 1:24750b9ad5ef 274
Christopher Haster 1:24750b9ad5ef 275 return( 0 );
Christopher Haster 1:24750b9ad5ef 276 }
Christopher Haster 1:24750b9ad5ef 277
Christopher Haster 1:24750b9ad5ef 278 int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
Christopher Haster 1:24750b9ad5ef 279 unsigned char *output )
Christopher Haster 1:24750b9ad5ef 280 {
Christopher Haster 1:24750b9ad5ef 281 if( md_info == NULL )
Christopher Haster 1:24750b9ad5ef 282 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 283
Christopher Haster 1:24750b9ad5ef 284 md_info->digest_func( input, ilen, output );
Christopher Haster 1:24750b9ad5ef 285
Christopher Haster 1:24750b9ad5ef 286 return( 0 );
Christopher Haster 1:24750b9ad5ef 287 }
Christopher Haster 1:24750b9ad5ef 288
Christopher Haster 1:24750b9ad5ef 289 #if defined(MBEDTLS_FS_IO)
Christopher Haster 1:24750b9ad5ef 290 int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
Christopher Haster 1:24750b9ad5ef 291 {
Christopher Haster 1:24750b9ad5ef 292 int ret;
Christopher Haster 1:24750b9ad5ef 293 FILE *f;
Christopher Haster 1:24750b9ad5ef 294 size_t n;
Christopher Haster 1:24750b9ad5ef 295 mbedtls_md_context_t ctx;
Christopher Haster 1:24750b9ad5ef 296 unsigned char buf[1024];
Christopher Haster 1:24750b9ad5ef 297
Christopher Haster 1:24750b9ad5ef 298 if( md_info == NULL )
Christopher Haster 1:24750b9ad5ef 299 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 300
Christopher Haster 1:24750b9ad5ef 301 if( ( f = fopen( path, "rb" ) ) == NULL )
Christopher Haster 1:24750b9ad5ef 302 return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
Christopher Haster 1:24750b9ad5ef 303
Christopher Haster 1:24750b9ad5ef 304 mbedtls_md_init( &ctx );
Christopher Haster 1:24750b9ad5ef 305
Christopher Haster 1:24750b9ad5ef 306 if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 307 goto cleanup;
Christopher Haster 1:24750b9ad5ef 308
Christopher Haster 1:24750b9ad5ef 309 md_info->starts_func( ctx.md_ctx );
Christopher Haster 1:24750b9ad5ef 310
Christopher Haster 1:24750b9ad5ef 311 while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
Christopher Haster 1:24750b9ad5ef 312 md_info->update_func( ctx.md_ctx, buf, n );
Christopher Haster 1:24750b9ad5ef 313
Christopher Haster 1:24750b9ad5ef 314 if( ferror( f ) != 0 )
Christopher Haster 1:24750b9ad5ef 315 {
Christopher Haster 1:24750b9ad5ef 316 ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
Christopher Haster 1:24750b9ad5ef 317 goto cleanup;
Christopher Haster 1:24750b9ad5ef 318 }
Christopher Haster 1:24750b9ad5ef 319
Christopher Haster 1:24750b9ad5ef 320 md_info->finish_func( ctx.md_ctx, output );
Christopher Haster 1:24750b9ad5ef 321
Christopher Haster 1:24750b9ad5ef 322 cleanup:
Christopher Haster 1:24750b9ad5ef 323 fclose( f );
Christopher Haster 1:24750b9ad5ef 324 mbedtls_md_free( &ctx );
Christopher Haster 1:24750b9ad5ef 325
Christopher Haster 1:24750b9ad5ef 326 return( ret );
Christopher Haster 1:24750b9ad5ef 327 }
Christopher Haster 1:24750b9ad5ef 328 #endif /* MBEDTLS_FS_IO */
Christopher Haster 1:24750b9ad5ef 329
Christopher Haster 1:24750b9ad5ef 330 int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
Christopher Haster 1:24750b9ad5ef 331 {
Christopher Haster 1:24750b9ad5ef 332 unsigned char sum[MBEDTLS_MD_MAX_SIZE];
Christopher Haster 1:24750b9ad5ef 333 unsigned char *ipad, *opad;
Christopher Haster 1:24750b9ad5ef 334 size_t i;
Christopher Haster 1:24750b9ad5ef 335
Christopher Haster 1:24750b9ad5ef 336 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
Christopher Haster 1:24750b9ad5ef 337 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 338
Christopher Haster 1:24750b9ad5ef 339 if( keylen > (size_t) ctx->md_info->block_size )
Christopher Haster 1:24750b9ad5ef 340 {
Christopher Haster 1:24750b9ad5ef 341 ctx->md_info->starts_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 342 ctx->md_info->update_func( ctx->md_ctx, key, keylen );
Christopher Haster 1:24750b9ad5ef 343 ctx->md_info->finish_func( ctx->md_ctx, sum );
Christopher Haster 1:24750b9ad5ef 344
Christopher Haster 1:24750b9ad5ef 345 keylen = ctx->md_info->size;
Christopher Haster 1:24750b9ad5ef 346 key = sum;
Christopher Haster 1:24750b9ad5ef 347 }
Christopher Haster 1:24750b9ad5ef 348
Christopher Haster 1:24750b9ad5ef 349 ipad = (unsigned char *) ctx->hmac_ctx;
Christopher Haster 1:24750b9ad5ef 350 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
Christopher Haster 1:24750b9ad5ef 351
Christopher Haster 1:24750b9ad5ef 352 memset( ipad, 0x36, ctx->md_info->block_size );
Christopher Haster 1:24750b9ad5ef 353 memset( opad, 0x5C, ctx->md_info->block_size );
Christopher Haster 1:24750b9ad5ef 354
Christopher Haster 1:24750b9ad5ef 355 for( i = 0; i < keylen; i++ )
Christopher Haster 1:24750b9ad5ef 356 {
Christopher Haster 1:24750b9ad5ef 357 ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
Christopher Haster 1:24750b9ad5ef 358 opad[i] = (unsigned char)( opad[i] ^ key[i] );
Christopher Haster 1:24750b9ad5ef 359 }
Christopher Haster 1:24750b9ad5ef 360
Christopher Haster 1:24750b9ad5ef 361 mbedtls_zeroize( sum, sizeof( sum ) );
Christopher Haster 1:24750b9ad5ef 362
Christopher Haster 1:24750b9ad5ef 363 ctx->md_info->starts_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 364 ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
Christopher Haster 1:24750b9ad5ef 365
Christopher Haster 1:24750b9ad5ef 366 return( 0 );
Christopher Haster 1:24750b9ad5ef 367 }
Christopher Haster 1:24750b9ad5ef 368
Christopher Haster 1:24750b9ad5ef 369 int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
Christopher Haster 1:24750b9ad5ef 370 {
Christopher Haster 1:24750b9ad5ef 371 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
Christopher Haster 1:24750b9ad5ef 372 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 373
Christopher Haster 1:24750b9ad5ef 374 ctx->md_info->update_func( ctx->md_ctx, input, ilen );
Christopher Haster 1:24750b9ad5ef 375
Christopher Haster 1:24750b9ad5ef 376 return( 0 );
Christopher Haster 1:24750b9ad5ef 377 }
Christopher Haster 1:24750b9ad5ef 378
Christopher Haster 1:24750b9ad5ef 379 int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
Christopher Haster 1:24750b9ad5ef 380 {
Christopher Haster 1:24750b9ad5ef 381 unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
Christopher Haster 1:24750b9ad5ef 382 unsigned char *opad;
Christopher Haster 1:24750b9ad5ef 383
Christopher Haster 1:24750b9ad5ef 384 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
Christopher Haster 1:24750b9ad5ef 385 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 386
Christopher Haster 1:24750b9ad5ef 387 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
Christopher Haster 1:24750b9ad5ef 388
Christopher Haster 1:24750b9ad5ef 389 ctx->md_info->finish_func( ctx->md_ctx, tmp );
Christopher Haster 1:24750b9ad5ef 390 ctx->md_info->starts_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 391 ctx->md_info->update_func( ctx->md_ctx, opad, ctx->md_info->block_size );
Christopher Haster 1:24750b9ad5ef 392 ctx->md_info->update_func( ctx->md_ctx, tmp, ctx->md_info->size );
Christopher Haster 1:24750b9ad5ef 393 ctx->md_info->finish_func( ctx->md_ctx, output );
Christopher Haster 1:24750b9ad5ef 394
Christopher Haster 1:24750b9ad5ef 395 return( 0 );
Christopher Haster 1:24750b9ad5ef 396 }
Christopher Haster 1:24750b9ad5ef 397
Christopher Haster 1:24750b9ad5ef 398 int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
Christopher Haster 1:24750b9ad5ef 399 {
Christopher Haster 1:24750b9ad5ef 400 unsigned char *ipad;
Christopher Haster 1:24750b9ad5ef 401
Christopher Haster 1:24750b9ad5ef 402 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
Christopher Haster 1:24750b9ad5ef 403 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 404
Christopher Haster 1:24750b9ad5ef 405 ipad = (unsigned char *) ctx->hmac_ctx;
Christopher Haster 1:24750b9ad5ef 406
Christopher Haster 1:24750b9ad5ef 407 ctx->md_info->starts_func( ctx->md_ctx );
Christopher Haster 1:24750b9ad5ef 408 ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
Christopher Haster 1:24750b9ad5ef 409
Christopher Haster 1:24750b9ad5ef 410 return( 0 );
Christopher Haster 1:24750b9ad5ef 411 }
Christopher Haster 1:24750b9ad5ef 412
Christopher Haster 1:24750b9ad5ef 413 int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
Christopher Haster 1:24750b9ad5ef 414 const unsigned char *input, size_t ilen,
Christopher Haster 1:24750b9ad5ef 415 unsigned char *output )
Christopher Haster 1:24750b9ad5ef 416 {
Christopher Haster 1:24750b9ad5ef 417 mbedtls_md_context_t ctx;
Christopher Haster 1:24750b9ad5ef 418 int ret;
Christopher Haster 1:24750b9ad5ef 419
Christopher Haster 1:24750b9ad5ef 420 if( md_info == NULL )
Christopher Haster 1:24750b9ad5ef 421 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 422
Christopher Haster 1:24750b9ad5ef 423 mbedtls_md_init( &ctx );
Christopher Haster 1:24750b9ad5ef 424
Christopher Haster 1:24750b9ad5ef 425 if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
Christopher Haster 1:24750b9ad5ef 426 return( ret );
Christopher Haster 1:24750b9ad5ef 427
Christopher Haster 1:24750b9ad5ef 428 mbedtls_md_hmac_starts( &ctx, key, keylen );
Christopher Haster 1:24750b9ad5ef 429 mbedtls_md_hmac_update( &ctx, input, ilen );
Christopher Haster 1:24750b9ad5ef 430 mbedtls_md_hmac_finish( &ctx, output );
Christopher Haster 1:24750b9ad5ef 431
Christopher Haster 1:24750b9ad5ef 432 mbedtls_md_free( &ctx );
Christopher Haster 1:24750b9ad5ef 433
Christopher Haster 1:24750b9ad5ef 434 return( 0 );
Christopher Haster 1:24750b9ad5ef 435 }
Christopher Haster 1:24750b9ad5ef 436
Christopher Haster 1:24750b9ad5ef 437 int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
Christopher Haster 1:24750b9ad5ef 438 {
Christopher Haster 1:24750b9ad5ef 439 if( ctx == NULL || ctx->md_info == NULL )
Christopher Haster 1:24750b9ad5ef 440 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
Christopher Haster 1:24750b9ad5ef 441
Christopher Haster 1:24750b9ad5ef 442 ctx->md_info->process_func( ctx->md_ctx, data );
Christopher Haster 1:24750b9ad5ef 443
Christopher Haster 1:24750b9ad5ef 444 return( 0 );
Christopher Haster 1:24750b9ad5ef 445 }
Christopher Haster 1:24750b9ad5ef 446
Christopher Haster 1:24750b9ad5ef 447 unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
Christopher Haster 1:24750b9ad5ef 448 {
Christopher Haster 1:24750b9ad5ef 449 if( md_info == NULL )
Christopher Haster 1:24750b9ad5ef 450 return( 0 );
Christopher Haster 1:24750b9ad5ef 451
Christopher Haster 1:24750b9ad5ef 452 return md_info->size;
Christopher Haster 1:24750b9ad5ef 453 }
Christopher Haster 1:24750b9ad5ef 454
Christopher Haster 1:24750b9ad5ef 455 mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
Christopher Haster 1:24750b9ad5ef 456 {
Christopher Haster 1:24750b9ad5ef 457 if( md_info == NULL )
Christopher Haster 1:24750b9ad5ef 458 return( MBEDTLS_MD_NONE );
Christopher Haster 1:24750b9ad5ef 459
Christopher Haster 1:24750b9ad5ef 460 return md_info->type;
Christopher Haster 1:24750b9ad5ef 461 }
Christopher Haster 1:24750b9ad5ef 462
Christopher Haster 1:24750b9ad5ef 463 const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
Christopher Haster 1:24750b9ad5ef 464 {
Christopher Haster 1:24750b9ad5ef 465 if( md_info == NULL )
Christopher Haster 1:24750b9ad5ef 466 return( NULL );
Christopher Haster 1:24750b9ad5ef 467
Christopher Haster 1:24750b9ad5ef 468 return md_info->name;
Christopher Haster 1:24750b9ad5ef 469 }
Christopher Haster 1:24750b9ad5ef 470
Christopher Haster 1:24750b9ad5ef 471 #endif /* MBEDTLS_MD_C */