Kev Mann / mbed-dev-OS5_10_4

RTC auf true

features/mbedtls/src/md.c@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /**
kevman 0:38ceb79fef03 2 * \file mbedtls_md.c
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * \brief Generic message digest wrapper for mbed TLS
kevman 0:38ceb79fef03 5 *
kevman 0:38ceb79fef03 6 * \author Adriaan de Jong <dejong@fox-it.com>
kevman 0:38ceb79fef03 7 *
kevman 0:38ceb79fef03 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kevman 0:38ceb79fef03 9 * SPDX-License-Identifier: Apache-2.0
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kevman 0:38ceb79fef03 12 * not use this file except in compliance with the License.
kevman 0:38ceb79fef03 13 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 14 *
kevman 0:38ceb79fef03 15 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 16 *
kevman 0:38ceb79fef03 17 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kevman 0:38ceb79fef03 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 20 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 21 * limitations under the License.
kevman 0:38ceb79fef03 22 *
kevman 0:38ceb79fef03 23 * This file is part of mbed TLS (https://tls.mbed.org)
kevman 0:38ceb79fef03 24 */
kevman 0:38ceb79fef03 25
kevman 0:38ceb79fef03 26 #if !defined(MBEDTLS_CONFIG_FILE)
kevman 0:38ceb79fef03 27 #include "mbedtls/config.h"
kevman 0:38ceb79fef03 28 #else
kevman 0:38ceb79fef03 29 #include MBEDTLS_CONFIG_FILE
kevman 0:38ceb79fef03 30 #endif
kevman 0:38ceb79fef03 31
kevman 0:38ceb79fef03 32 #if defined(MBEDTLS_MD_C)
kevman 0:38ceb79fef03 33
kevman 0:38ceb79fef03 34 #include "mbedtls/md.h"
kevman 0:38ceb79fef03 35 #include "mbedtls/md_internal.h"
kevman 0:38ceb79fef03 36 #include "mbedtls/platform_util.h"
kevman 0:38ceb79fef03 37
kevman 0:38ceb79fef03 38 #if defined(MBEDTLS_PLATFORM_C)
kevman 0:38ceb79fef03 39 #include "mbedtls/platform.h"
kevman 0:38ceb79fef03 40 #else
kevman 0:38ceb79fef03 41 #include <stdlib.h>
kevman 0:38ceb79fef03 42 #define mbedtls_calloc calloc
kevman 0:38ceb79fef03 43 #define mbedtls_free free
kevman 0:38ceb79fef03 44 #endif
kevman 0:38ceb79fef03 45
kevman 0:38ceb79fef03 46 #include <string.h>
kevman 0:38ceb79fef03 47
kevman 0:38ceb79fef03 48 #if defined(MBEDTLS_FS_IO)
kevman 0:38ceb79fef03 49 #include <stdio.h>
kevman 0:38ceb79fef03 50 #endif
kevman 0:38ceb79fef03 51
kevman 0:38ceb79fef03 52 /*
kevman 0:38ceb79fef03 53 * Reminder: update profiles in x509_crt.c when adding a new hash!
kevman 0:38ceb79fef03 54 */
kevman 0:38ceb79fef03 55 static const int supported_digests[] = {
kevman 0:38ceb79fef03 56
kevman 0:38ceb79fef03 57 #if defined(MBEDTLS_SHA512_C)
kevman 0:38ceb79fef03 58 MBEDTLS_MD_SHA512,
kevman 0:38ceb79fef03 59 MBEDTLS_MD_SHA384,
kevman 0:38ceb79fef03 60 #endif
kevman 0:38ceb79fef03 61
kevman 0:38ceb79fef03 62 #if defined(MBEDTLS_SHA256_C)
kevman 0:38ceb79fef03 63 MBEDTLS_MD_SHA256,
kevman 0:38ceb79fef03 64 MBEDTLS_MD_SHA224,
kevman 0:38ceb79fef03 65 #endif
kevman 0:38ceb79fef03 66
kevman 0:38ceb79fef03 67 #if defined(MBEDTLS_SHA1_C)
kevman 0:38ceb79fef03 68 MBEDTLS_MD_SHA1,
kevman 0:38ceb79fef03 69 #endif
kevman 0:38ceb79fef03 70
kevman 0:38ceb79fef03 71 #if defined(MBEDTLS_RIPEMD160_C)
kevman 0:38ceb79fef03 72 MBEDTLS_MD_RIPEMD160,
kevman 0:38ceb79fef03 73 #endif
kevman 0:38ceb79fef03 74
kevman 0:38ceb79fef03 75 #if defined(MBEDTLS_MD5_C)
kevman 0:38ceb79fef03 76 MBEDTLS_MD_MD5,
kevman 0:38ceb79fef03 77 #endif
kevman 0:38ceb79fef03 78
kevman 0:38ceb79fef03 79 #if defined(MBEDTLS_MD4_C)
kevman 0:38ceb79fef03 80 MBEDTLS_MD_MD4,
kevman 0:38ceb79fef03 81 #endif
kevman 0:38ceb79fef03 82
kevman 0:38ceb79fef03 83 #if defined(MBEDTLS_MD2_C)
kevman 0:38ceb79fef03 84 MBEDTLS_MD_MD2,
kevman 0:38ceb79fef03 85 #endif
kevman 0:38ceb79fef03 86
kevman 0:38ceb79fef03 87 MBEDTLS_MD_NONE
kevman 0:38ceb79fef03 88 };
kevman 0:38ceb79fef03 89
kevman 0:38ceb79fef03 90 const int *mbedtls_md_list( void )
kevman 0:38ceb79fef03 91 {
kevman 0:38ceb79fef03 92 return( supported_digests );
kevman 0:38ceb79fef03 93 }
kevman 0:38ceb79fef03 94
kevman 0:38ceb79fef03 95 const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
kevman 0:38ceb79fef03 96 {
kevman 0:38ceb79fef03 97 if( NULL == md_name )
kevman 0:38ceb79fef03 98 return( NULL );
kevman 0:38ceb79fef03 99
kevman 0:38ceb79fef03 100 /* Get the appropriate digest information */
kevman 0:38ceb79fef03 101 #if defined(MBEDTLS_MD2_C)
kevman 0:38ceb79fef03 102 if( !strcmp( "MD2", md_name ) )
kevman 0:38ceb79fef03 103 return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 );
kevman 0:38ceb79fef03 104 #endif
kevman 0:38ceb79fef03 105 #if defined(MBEDTLS_MD4_C)
kevman 0:38ceb79fef03 106 if( !strcmp( "MD4", md_name ) )
kevman 0:38ceb79fef03 107 return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 );
kevman 0:38ceb79fef03 108 #endif
kevman 0:38ceb79fef03 109 #if defined(MBEDTLS_MD5_C)
kevman 0:38ceb79fef03 110 if( !strcmp( "MD5", md_name ) )
kevman 0:38ceb79fef03 111 return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
kevman 0:38ceb79fef03 112 #endif
kevman 0:38ceb79fef03 113 #if defined(MBEDTLS_RIPEMD160_C)
kevman 0:38ceb79fef03 114 if( !strcmp( "RIPEMD160", md_name ) )
kevman 0:38ceb79fef03 115 return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
kevman 0:38ceb79fef03 116 #endif
kevman 0:38ceb79fef03 117 #if defined(MBEDTLS_SHA1_C)
kevman 0:38ceb79fef03 118 if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
kevman 0:38ceb79fef03 119 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
kevman 0:38ceb79fef03 120 #endif
kevman 0:38ceb79fef03 121 #if defined(MBEDTLS_SHA256_C)
kevman 0:38ceb79fef03 122 if( !strcmp( "SHA224", md_name ) )
kevman 0:38ceb79fef03 123 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
kevman 0:38ceb79fef03 124 if( !strcmp( "SHA256", md_name ) )
kevman 0:38ceb79fef03 125 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
kevman 0:38ceb79fef03 126 #endif
kevman 0:38ceb79fef03 127 #if defined(MBEDTLS_SHA512_C)
kevman 0:38ceb79fef03 128 if( !strcmp( "SHA384", md_name ) )
kevman 0:38ceb79fef03 129 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
kevman 0:38ceb79fef03 130 if( !strcmp( "SHA512", md_name ) )
kevman 0:38ceb79fef03 131 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
kevman 0:38ceb79fef03 132 #endif
kevman 0:38ceb79fef03 133 return( NULL );
kevman 0:38ceb79fef03 134 }
kevman 0:38ceb79fef03 135
kevman 0:38ceb79fef03 136 const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
kevman 0:38ceb79fef03 137 {
kevman 0:38ceb79fef03 138 switch( md_type )
kevman 0:38ceb79fef03 139 {
kevman 0:38ceb79fef03 140 #if defined(MBEDTLS_MD2_C)
kevman 0:38ceb79fef03 141 case MBEDTLS_MD_MD2:
kevman 0:38ceb79fef03 142 return( &mbedtls_md2_info );
kevman 0:38ceb79fef03 143 #endif
kevman 0:38ceb79fef03 144 #if defined(MBEDTLS_MD4_C)
kevman 0:38ceb79fef03 145 case MBEDTLS_MD_MD4:
kevman 0:38ceb79fef03 146 return( &mbedtls_md4_info );
kevman 0:38ceb79fef03 147 #endif
kevman 0:38ceb79fef03 148 #if defined(MBEDTLS_MD5_C)
kevman 0:38ceb79fef03 149 case MBEDTLS_MD_MD5:
kevman 0:38ceb79fef03 150 return( &mbedtls_md5_info );
kevman 0:38ceb79fef03 151 #endif
kevman 0:38ceb79fef03 152 #if defined(MBEDTLS_RIPEMD160_C)
kevman 0:38ceb79fef03 153 case MBEDTLS_MD_RIPEMD160:
kevman 0:38ceb79fef03 154 return( &mbedtls_ripemd160_info );
kevman 0:38ceb79fef03 155 #endif
kevman 0:38ceb79fef03 156 #if defined(MBEDTLS_SHA1_C)
kevman 0:38ceb79fef03 157 case MBEDTLS_MD_SHA1:
kevman 0:38ceb79fef03 158 return( &mbedtls_sha1_info );
kevman 0:38ceb79fef03 159 #endif
kevman 0:38ceb79fef03 160 #if defined(MBEDTLS_SHA256_C)
kevman 0:38ceb79fef03 161 case MBEDTLS_MD_SHA224:
kevman 0:38ceb79fef03 162 return( &mbedtls_sha224_info );
kevman 0:38ceb79fef03 163 case MBEDTLS_MD_SHA256:
kevman 0:38ceb79fef03 164 return( &mbedtls_sha256_info );
kevman 0:38ceb79fef03 165 #endif
kevman 0:38ceb79fef03 166 #if defined(MBEDTLS_SHA512_C)
kevman 0:38ceb79fef03 167 case MBEDTLS_MD_SHA384:
kevman 0:38ceb79fef03 168 return( &mbedtls_sha384_info );
kevman 0:38ceb79fef03 169 case MBEDTLS_MD_SHA512:
kevman 0:38ceb79fef03 170 return( &mbedtls_sha512_info );
kevman 0:38ceb79fef03 171 #endif
kevman 0:38ceb79fef03 172 default:
kevman 0:38ceb79fef03 173 return( NULL );
kevman 0:38ceb79fef03 174 }
kevman 0:38ceb79fef03 175 }
kevman 0:38ceb79fef03 176
kevman 0:38ceb79fef03 177 void mbedtls_md_init( mbedtls_md_context_t *ctx )
kevman 0:38ceb79fef03 178 {
kevman 0:38ceb79fef03 179 memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
kevman 0:38ceb79fef03 180 }
kevman 0:38ceb79fef03 181
kevman 0:38ceb79fef03 182 void mbedtls_md_free( mbedtls_md_context_t *ctx )
kevman 0:38ceb79fef03 183 {
kevman 0:38ceb79fef03 184 if( ctx == NULL || ctx->md_info == NULL )
kevman 0:38ceb79fef03 185 return;
kevman 0:38ceb79fef03 186
kevman 0:38ceb79fef03 187 if( ctx->md_ctx != NULL )
kevman 0:38ceb79fef03 188 ctx->md_info->ctx_free_func( ctx->md_ctx );
kevman 0:38ceb79fef03 189
kevman 0:38ceb79fef03 190 if( ctx->hmac_ctx != NULL )
kevman 0:38ceb79fef03 191 {
kevman 0:38ceb79fef03 192 mbedtls_platform_zeroize( ctx->hmac_ctx,
kevman 0:38ceb79fef03 193 2 * ctx->md_info->block_size );
kevman 0:38ceb79fef03 194 mbedtls_free( ctx->hmac_ctx );
kevman 0:38ceb79fef03 195 }
kevman 0:38ceb79fef03 196
kevman 0:38ceb79fef03 197 mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
kevman 0:38ceb79fef03 198 }
kevman 0:38ceb79fef03 199
kevman 0:38ceb79fef03 200 int mbedtls_md_clone( mbedtls_md_context_t *dst,
kevman 0:38ceb79fef03 201 const mbedtls_md_context_t *src )
kevman 0:38ceb79fef03 202 {
kevman 0:38ceb79fef03 203 if( dst == NULL || dst->md_info == NULL ||
kevman 0:38ceb79fef03 204 src == NULL || src->md_info == NULL ||
kevman 0:38ceb79fef03 205 dst->md_info != src->md_info )
kevman 0:38ceb79fef03 206 {
kevman 0:38ceb79fef03 207 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 208 }
kevman 0:38ceb79fef03 209
kevman 0:38ceb79fef03 210 dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
kevman 0:38ceb79fef03 211
kevman 0:38ceb79fef03 212 return( 0 );
kevman 0:38ceb79fef03 213 }
kevman 0:38ceb79fef03 214
kevman 0:38ceb79fef03 215 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
kevman 0:38ceb79fef03 216 int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
kevman 0:38ceb79fef03 217 {
kevman 0:38ceb79fef03 218 return mbedtls_md_setup( ctx, md_info, 1 );
kevman 0:38ceb79fef03 219 }
kevman 0:38ceb79fef03 220 #endif
kevman 0:38ceb79fef03 221
kevman 0:38ceb79fef03 222 int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
kevman 0:38ceb79fef03 223 {
kevman 0:38ceb79fef03 224 if( md_info == NULL || ctx == NULL )
kevman 0:38ceb79fef03 225 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 226
kevman 0:38ceb79fef03 227 if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
kevman 0:38ceb79fef03 228 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
kevman 0:38ceb79fef03 229
kevman 0:38ceb79fef03 230 if( hmac != 0 )
kevman 0:38ceb79fef03 231 {
kevman 0:38ceb79fef03 232 ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
kevman 0:38ceb79fef03 233 if( ctx->hmac_ctx == NULL )
kevman 0:38ceb79fef03 234 {
kevman 0:38ceb79fef03 235 md_info->ctx_free_func( ctx->md_ctx );
kevman 0:38ceb79fef03 236 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
kevman 0:38ceb79fef03 237 }
kevman 0:38ceb79fef03 238 }
kevman 0:38ceb79fef03 239
kevman 0:38ceb79fef03 240 ctx->md_info = md_info;
kevman 0:38ceb79fef03 241
kevman 0:38ceb79fef03 242 return( 0 );
kevman 0:38ceb79fef03 243 }
kevman 0:38ceb79fef03 244
kevman 0:38ceb79fef03 245 int mbedtls_md_starts( mbedtls_md_context_t *ctx )
kevman 0:38ceb79fef03 246 {
kevman 0:38ceb79fef03 247 if( ctx == NULL || ctx->md_info == NULL )
kevman 0:38ceb79fef03 248 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 249
kevman 0:38ceb79fef03 250 return( ctx->md_info->starts_func( ctx->md_ctx ) );
kevman 0:38ceb79fef03 251 }
kevman 0:38ceb79fef03 252
kevman 0:38ceb79fef03 253 int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
kevman 0:38ceb79fef03 254 {
kevman 0:38ceb79fef03 255 if( ctx == NULL || ctx->md_info == NULL )
kevman 0:38ceb79fef03 256 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 257
kevman 0:38ceb79fef03 258 return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
kevman 0:38ceb79fef03 259 }
kevman 0:38ceb79fef03 260
kevman 0:38ceb79fef03 261 int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
kevman 0:38ceb79fef03 262 {
kevman 0:38ceb79fef03 263 if( ctx == NULL || ctx->md_info == NULL )
kevman 0:38ceb79fef03 264 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 265
kevman 0:38ceb79fef03 266 return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
kevman 0:38ceb79fef03 267 }
kevman 0:38ceb79fef03 268
kevman 0:38ceb79fef03 269 int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
kevman 0:38ceb79fef03 270 unsigned char *output )
kevman 0:38ceb79fef03 271 {
kevman 0:38ceb79fef03 272 if( md_info == NULL )
kevman 0:38ceb79fef03 273 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 274
kevman 0:38ceb79fef03 275 return( md_info->digest_func( input, ilen, output ) );
kevman 0:38ceb79fef03 276 }
kevman 0:38ceb79fef03 277
kevman 0:38ceb79fef03 278 #if defined(MBEDTLS_FS_IO)
kevman 0:38ceb79fef03 279 int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
kevman 0:38ceb79fef03 280 {
kevman 0:38ceb79fef03 281 int ret;
kevman 0:38ceb79fef03 282 FILE *f;
kevman 0:38ceb79fef03 283 size_t n;
kevman 0:38ceb79fef03 284 mbedtls_md_context_t ctx;
kevman 0:38ceb79fef03 285 unsigned char buf[1024];
kevman 0:38ceb79fef03 286
kevman 0:38ceb79fef03 287 if( md_info == NULL )
kevman 0:38ceb79fef03 288 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 289
kevman 0:38ceb79fef03 290 if( ( f = fopen( path, "rb" ) ) == NULL )
kevman 0:38ceb79fef03 291 return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
kevman 0:38ceb79fef03 292
kevman 0:38ceb79fef03 293 mbedtls_md_init( &ctx );
kevman 0:38ceb79fef03 294
kevman 0:38ceb79fef03 295 if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
kevman 0:38ceb79fef03 296 goto cleanup;
kevman 0:38ceb79fef03 297
kevman 0:38ceb79fef03 298 if( ( ret = md_info->starts_func( ctx.md_ctx ) ) != 0 )
kevman 0:38ceb79fef03 299 goto cleanup;
kevman 0:38ceb79fef03 300
kevman 0:38ceb79fef03 301 while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
kevman 0:38ceb79fef03 302 if( ( ret = md_info->update_func( ctx.md_ctx, buf, n ) ) != 0 )
kevman 0:38ceb79fef03 303 goto cleanup;
kevman 0:38ceb79fef03 304
kevman 0:38ceb79fef03 305 if( ferror( f ) != 0 )
kevman 0:38ceb79fef03 306 ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
kevman 0:38ceb79fef03 307 else
kevman 0:38ceb79fef03 308 ret = md_info->finish_func( ctx.md_ctx, output );
kevman 0:38ceb79fef03 309
kevman 0:38ceb79fef03 310 cleanup:
kevman 0:38ceb79fef03 311 mbedtls_platform_zeroize( buf, sizeof( buf ) );
kevman 0:38ceb79fef03 312 fclose( f );
kevman 0:38ceb79fef03 313 mbedtls_md_free( &ctx );
kevman 0:38ceb79fef03 314
kevman 0:38ceb79fef03 315 return( ret );
kevman 0:38ceb79fef03 316 }
kevman 0:38ceb79fef03 317 #endif /* MBEDTLS_FS_IO */
kevman 0:38ceb79fef03 318
kevman 0:38ceb79fef03 319 int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
kevman 0:38ceb79fef03 320 {
kevman 0:38ceb79fef03 321 int ret;
kevman 0:38ceb79fef03 322 unsigned char sum[MBEDTLS_MD_MAX_SIZE];
kevman 0:38ceb79fef03 323 unsigned char *ipad, *opad;
kevman 0:38ceb79fef03 324 size_t i;
kevman 0:38ceb79fef03 325
kevman 0:38ceb79fef03 326 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
kevman 0:38ceb79fef03 327 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 328
kevman 0:38ceb79fef03 329 if( keylen > (size_t) ctx->md_info->block_size )
kevman 0:38ceb79fef03 330 {
kevman 0:38ceb79fef03 331 if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
kevman 0:38ceb79fef03 332 goto cleanup;
kevman 0:38ceb79fef03 333 if( ( ret = ctx->md_info->update_func( ctx->md_ctx, key, keylen ) ) != 0 )
kevman 0:38ceb79fef03 334 goto cleanup;
kevman 0:38ceb79fef03 335 if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, sum ) ) != 0 )
kevman 0:38ceb79fef03 336 goto cleanup;
kevman 0:38ceb79fef03 337
kevman 0:38ceb79fef03 338 keylen = ctx->md_info->size;
kevman 0:38ceb79fef03 339 key = sum;
kevman 0:38ceb79fef03 340 }
kevman 0:38ceb79fef03 341
kevman 0:38ceb79fef03 342 ipad = (unsigned char *) ctx->hmac_ctx;
kevman 0:38ceb79fef03 343 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
kevman 0:38ceb79fef03 344
kevman 0:38ceb79fef03 345 memset( ipad, 0x36, ctx->md_info->block_size );
kevman 0:38ceb79fef03 346 memset( opad, 0x5C, ctx->md_info->block_size );
kevman 0:38ceb79fef03 347
kevman 0:38ceb79fef03 348 for( i = 0; i < keylen; i++ )
kevman 0:38ceb79fef03 349 {
kevman 0:38ceb79fef03 350 ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
kevman 0:38ceb79fef03 351 opad[i] = (unsigned char)( opad[i] ^ key[i] );
kevman 0:38ceb79fef03 352 }
kevman 0:38ceb79fef03 353
kevman 0:38ceb79fef03 354 if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
kevman 0:38ceb79fef03 355 goto cleanup;
kevman 0:38ceb79fef03 356 if( ( ret = ctx->md_info->update_func( ctx->md_ctx, ipad,
kevman 0:38ceb79fef03 357 ctx->md_info->block_size ) ) != 0 )
kevman 0:38ceb79fef03 358 goto cleanup;
kevman 0:38ceb79fef03 359
kevman 0:38ceb79fef03 360 cleanup:
kevman 0:38ceb79fef03 361 mbedtls_platform_zeroize( sum, sizeof( sum ) );
kevman 0:38ceb79fef03 362
kevman 0:38ceb79fef03 363 return( ret );
kevman 0:38ceb79fef03 364 }
kevman 0:38ceb79fef03 365
kevman 0:38ceb79fef03 366 int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
kevman 0:38ceb79fef03 367 {
kevman 0:38ceb79fef03 368 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
kevman 0:38ceb79fef03 369 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 370
kevman 0:38ceb79fef03 371 return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
kevman 0:38ceb79fef03 372 }
kevman 0:38ceb79fef03 373
kevman 0:38ceb79fef03 374 int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
kevman 0:38ceb79fef03 375 {
kevman 0:38ceb79fef03 376 int ret;
kevman 0:38ceb79fef03 377 unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
kevman 0:38ceb79fef03 378 unsigned char *opad;
kevman 0:38ceb79fef03 379
kevman 0:38ceb79fef03 380 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
kevman 0:38ceb79fef03 381 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 382
kevman 0:38ceb79fef03 383 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
kevman 0:38ceb79fef03 384
kevman 0:38ceb79fef03 385 if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, tmp ) ) != 0 )
kevman 0:38ceb79fef03 386 return( ret );
kevman 0:38ceb79fef03 387 if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
kevman 0:38ceb79fef03 388 return( ret );
kevman 0:38ceb79fef03 389 if( ( ret = ctx->md_info->update_func( ctx->md_ctx, opad,
kevman 0:38ceb79fef03 390 ctx->md_info->block_size ) ) != 0 )
kevman 0:38ceb79fef03 391 return( ret );
kevman 0:38ceb79fef03 392 if( ( ret = ctx->md_info->update_func( ctx->md_ctx, tmp,
kevman 0:38ceb79fef03 393 ctx->md_info->size ) ) != 0 )
kevman 0:38ceb79fef03 394 return( ret );
kevman 0:38ceb79fef03 395 return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
kevman 0:38ceb79fef03 396 }
kevman 0:38ceb79fef03 397
kevman 0:38ceb79fef03 398 int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
kevman 0:38ceb79fef03 399 {
kevman 0:38ceb79fef03 400 int ret;
kevman 0:38ceb79fef03 401 unsigned char *ipad;
kevman 0:38ceb79fef03 402
kevman 0:38ceb79fef03 403 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
kevman 0:38ceb79fef03 404 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 405
kevman 0:38ceb79fef03 406 ipad = (unsigned char *) ctx->hmac_ctx;
kevman 0:38ceb79fef03 407
kevman 0:38ceb79fef03 408 if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
kevman 0:38ceb79fef03 409 return( ret );
kevman 0:38ceb79fef03 410 return( ctx->md_info->update_func( ctx->md_ctx, ipad,
kevman 0:38ceb79fef03 411 ctx->md_info->block_size ) );
kevman 0:38ceb79fef03 412 }
kevman 0:38ceb79fef03 413
kevman 0:38ceb79fef03 414 int mbedtls_md_hmac( const mbedtls_md_info_t *md_info,
kevman 0:38ceb79fef03 415 const unsigned char *key, size_t keylen,
kevman 0:38ceb79fef03 416 const unsigned char *input, size_t ilen,
kevman 0:38ceb79fef03 417 unsigned char *output )
kevman 0:38ceb79fef03 418 {
kevman 0:38ceb79fef03 419 mbedtls_md_context_t ctx;
kevman 0:38ceb79fef03 420 int ret;
kevman 0:38ceb79fef03 421
kevman 0:38ceb79fef03 422 if( md_info == NULL )
kevman 0:38ceb79fef03 423 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 424
kevman 0:38ceb79fef03 425 mbedtls_md_init( &ctx );
kevman 0:38ceb79fef03 426
kevman 0:38ceb79fef03 427 if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
kevman 0:38ceb79fef03 428 goto cleanup;
kevman 0:38ceb79fef03 429
kevman 0:38ceb79fef03 430 if( ( ret = mbedtls_md_hmac_starts( &ctx, key, keylen ) ) != 0 )
kevman 0:38ceb79fef03 431 goto cleanup;
kevman 0:38ceb79fef03 432 if( ( ret = mbedtls_md_hmac_update( &ctx, input, ilen ) ) != 0 )
kevman 0:38ceb79fef03 433 goto cleanup;
kevman 0:38ceb79fef03 434 if( ( ret = mbedtls_md_hmac_finish( &ctx, output ) ) != 0 )
kevman 0:38ceb79fef03 435 goto cleanup;
kevman 0:38ceb79fef03 436
kevman 0:38ceb79fef03 437 cleanup:
kevman 0:38ceb79fef03 438 mbedtls_md_free( &ctx );
kevman 0:38ceb79fef03 439
kevman 0:38ceb79fef03 440 return( ret );
kevman 0:38ceb79fef03 441 }
kevman 0:38ceb79fef03 442
kevman 0:38ceb79fef03 443 int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
kevman 0:38ceb79fef03 444 {
kevman 0:38ceb79fef03 445 if( ctx == NULL || ctx->md_info == NULL )
kevman 0:38ceb79fef03 446 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 447
kevman 0:38ceb79fef03 448 return( ctx->md_info->process_func( ctx->md_ctx, data ) );
kevman 0:38ceb79fef03 449 }
kevman 0:38ceb79fef03 450
kevman 0:38ceb79fef03 451 unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
kevman 0:38ceb79fef03 452 {
kevman 0:38ceb79fef03 453 if( md_info == NULL )
kevman 0:38ceb79fef03 454 return( 0 );
kevman 0:38ceb79fef03 455
kevman 0:38ceb79fef03 456 return md_info->size;
kevman 0:38ceb79fef03 457 }
kevman 0:38ceb79fef03 458
kevman 0:38ceb79fef03 459 mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
kevman 0:38ceb79fef03 460 {
kevman 0:38ceb79fef03 461 if( md_info == NULL )
kevman 0:38ceb79fef03 462 return( MBEDTLS_MD_NONE );
kevman 0:38ceb79fef03 463
kevman 0:38ceb79fef03 464 return md_info->type;
kevman 0:38ceb79fef03 465 }
kevman 0:38ceb79fef03 466
kevman 0:38ceb79fef03 467 const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
kevman 0:38ceb79fef03 468 {
kevman 0:38ceb79fef03 469 if( md_info == NULL )
kevman 0:38ceb79fef03 470 return( NULL );
kevman 0:38ceb79fef03 471
kevman 0:38ceb79fef03 472 return md_info->name;
kevman 0:38ceb79fef03 473 }
kevman 0:38ceb79fef03 474
kevman 0:38ceb79fef03 475 #endif /* MBEDTLS_MD_C */