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