Gleb Klochkov / Mbed OS Climatcontroll_Main

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Dependencies:   esp8266-driver

mbed-os/features/mbedtls/src/pkcs12.c@0:2f0e1e23c242, 2018-04-13 (annotated)

Committer:
glebiuskv
Date:
Fri Apr 13 08:53:46 2018 +0000
Revision:
0:2f0e1e23c242
initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
glebiuskv 0:2f0e1e23c242 1 /*
glebiuskv 0:2f0e1e23c242 2 * PKCS#12 Personal Information Exchange Syntax
glebiuskv 0:2f0e1e23c242 3 *
glebiuskv 0:2f0e1e23c242 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
glebiuskv 0:2f0e1e23c242 5 * SPDX-License-Identifier: Apache-2.0
glebiuskv 0:2f0e1e23c242 6 *
glebiuskv 0:2f0e1e23c242 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
glebiuskv 0:2f0e1e23c242 8 * not use this file except in compliance with the License.
glebiuskv 0:2f0e1e23c242 9 * You may obtain a copy of the License at
glebiuskv 0:2f0e1e23c242 10 *
glebiuskv 0:2f0e1e23c242 11 * http://www.apache.org/licenses/LICENSE-2.0
glebiuskv 0:2f0e1e23c242 12 *
glebiuskv 0:2f0e1e23c242 13 * Unless required by applicable law or agreed to in writing, software
glebiuskv 0:2f0e1e23c242 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
glebiuskv 0:2f0e1e23c242 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
glebiuskv 0:2f0e1e23c242 16 * See the License for the specific language governing permissions and
glebiuskv 0:2f0e1e23c242 17 * limitations under the License.
glebiuskv 0:2f0e1e23c242 18 *
glebiuskv 0:2f0e1e23c242 19 * This file is part of mbed TLS (https://tls.mbed.org)
glebiuskv 0:2f0e1e23c242 20 */
glebiuskv 0:2f0e1e23c242 21 /*
glebiuskv 0:2f0e1e23c242 22 * The PKCS #12 Personal Information Exchange Syntax Standard v1.1
glebiuskv 0:2f0e1e23c242 23 *
glebiuskv 0:2f0e1e23c242 24 * http://www.rsa.com/rsalabs/pkcs/files/h11301-wp-pkcs-12v1-1-personal-information-exchange-syntax.pdf
glebiuskv 0:2f0e1e23c242 25 * ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1-1.asn
glebiuskv 0:2f0e1e23c242 26 */
glebiuskv 0:2f0e1e23c242 27
glebiuskv 0:2f0e1e23c242 28 #if !defined(MBEDTLS_CONFIG_FILE)
glebiuskv 0:2f0e1e23c242 29 #include "mbedtls/config.h"
glebiuskv 0:2f0e1e23c242 30 #else
glebiuskv 0:2f0e1e23c242 31 #include MBEDTLS_CONFIG_FILE
glebiuskv 0:2f0e1e23c242 32 #endif
glebiuskv 0:2f0e1e23c242 33
glebiuskv 0:2f0e1e23c242 34 #if defined(MBEDTLS_PKCS12_C)
glebiuskv 0:2f0e1e23c242 35
glebiuskv 0:2f0e1e23c242 36 #include "mbedtls/pkcs12.h"
glebiuskv 0:2f0e1e23c242 37 #include "mbedtls/asn1.h"
glebiuskv 0:2f0e1e23c242 38 #include "mbedtls/cipher.h"
glebiuskv 0:2f0e1e23c242 39
glebiuskv 0:2f0e1e23c242 40 #include <string.h>
glebiuskv 0:2f0e1e23c242 41
glebiuskv 0:2f0e1e23c242 42 #if defined(MBEDTLS_ARC4_C)
glebiuskv 0:2f0e1e23c242 43 #include "mbedtls/arc4.h"
glebiuskv 0:2f0e1e23c242 44 #endif
glebiuskv 0:2f0e1e23c242 45
glebiuskv 0:2f0e1e23c242 46 #if defined(MBEDTLS_DES_C)
glebiuskv 0:2f0e1e23c242 47 #include "mbedtls/des.h"
glebiuskv 0:2f0e1e23c242 48 #endif
glebiuskv 0:2f0e1e23c242 49
glebiuskv 0:2f0e1e23c242 50 /* Implementation that should never be optimized out by the compiler */
glebiuskv 0:2f0e1e23c242 51 static void mbedtls_zeroize( void *v, size_t n ) {
glebiuskv 0:2f0e1e23c242 52 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
glebiuskv 0:2f0e1e23c242 53 }
glebiuskv 0:2f0e1e23c242 54
glebiuskv 0:2f0e1e23c242 55 static int pkcs12_parse_pbe_params( mbedtls_asn1_buf *params,
glebiuskv 0:2f0e1e23c242 56 mbedtls_asn1_buf *salt, int *iterations )
glebiuskv 0:2f0e1e23c242 57 {
glebiuskv 0:2f0e1e23c242 58 int ret;
glebiuskv 0:2f0e1e23c242 59 unsigned char **p = &params->p;
glebiuskv 0:2f0e1e23c242 60 const unsigned char *end = params->p + params->len;
glebiuskv 0:2f0e1e23c242 61
glebiuskv 0:2f0e1e23c242 62 /*
glebiuskv 0:2f0e1e23c242 63 * pkcs-12PbeParams ::= SEQUENCE {
glebiuskv 0:2f0e1e23c242 64 * salt OCTET STRING,
glebiuskv 0:2f0e1e23c242 65 * iterations INTEGER
glebiuskv 0:2f0e1e23c242 66 * }
glebiuskv 0:2f0e1e23c242 67 *
glebiuskv 0:2f0e1e23c242 68 */
glebiuskv 0:2f0e1e23c242 69 if( params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
glebiuskv 0:2f0e1e23c242 70 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT +
glebiuskv 0:2f0e1e23c242 71 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
glebiuskv 0:2f0e1e23c242 72
glebiuskv 0:2f0e1e23c242 73 if( ( ret = mbedtls_asn1_get_tag( p, end, &salt->len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
glebiuskv 0:2f0e1e23c242 74 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + ret );
glebiuskv 0:2f0e1e23c242 75
glebiuskv 0:2f0e1e23c242 76 salt->p = *p;
glebiuskv 0:2f0e1e23c242 77 *p += salt->len;
glebiuskv 0:2f0e1e23c242 78
glebiuskv 0:2f0e1e23c242 79 if( ( ret = mbedtls_asn1_get_int( p, end, iterations ) ) != 0 )
glebiuskv 0:2f0e1e23c242 80 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + ret );
glebiuskv 0:2f0e1e23c242 81
glebiuskv 0:2f0e1e23c242 82 if( *p != end )
glebiuskv 0:2f0e1e23c242 83 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT +
glebiuskv 0:2f0e1e23c242 84 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
glebiuskv 0:2f0e1e23c242 85
glebiuskv 0:2f0e1e23c242 86 return( 0 );
glebiuskv 0:2f0e1e23c242 87 }
glebiuskv 0:2f0e1e23c242 88
glebiuskv 0:2f0e1e23c242 89 #define PKCS12_MAX_PWDLEN 128
glebiuskv 0:2f0e1e23c242 90
glebiuskv 0:2f0e1e23c242 91 static int pkcs12_pbe_derive_key_iv( mbedtls_asn1_buf *pbe_params, mbedtls_md_type_t md_type,
glebiuskv 0:2f0e1e23c242 92 const unsigned char *pwd, size_t pwdlen,
glebiuskv 0:2f0e1e23c242 93 unsigned char *key, size_t keylen,
glebiuskv 0:2f0e1e23c242 94 unsigned char *iv, size_t ivlen )
glebiuskv 0:2f0e1e23c242 95 {
glebiuskv 0:2f0e1e23c242 96 int ret, iterations = 0;
glebiuskv 0:2f0e1e23c242 97 mbedtls_asn1_buf salt;
glebiuskv 0:2f0e1e23c242 98 size_t i;
glebiuskv 0:2f0e1e23c242 99 unsigned char unipwd[PKCS12_MAX_PWDLEN * 2 + 2];
glebiuskv 0:2f0e1e23c242 100
glebiuskv 0:2f0e1e23c242 101 if( pwdlen > PKCS12_MAX_PWDLEN )
glebiuskv 0:2f0e1e23c242 102 return( MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA );
glebiuskv 0:2f0e1e23c242 103
glebiuskv 0:2f0e1e23c242 104 memset( &salt, 0, sizeof(mbedtls_asn1_buf) );
glebiuskv 0:2f0e1e23c242 105 memset( &unipwd, 0, sizeof(unipwd) );
glebiuskv 0:2f0e1e23c242 106
glebiuskv 0:2f0e1e23c242 107 if( ( ret = pkcs12_parse_pbe_params( pbe_params, &salt,
glebiuskv 0:2f0e1e23c242 108 &iterations ) ) != 0 )
glebiuskv 0:2f0e1e23c242 109 return( ret );
glebiuskv 0:2f0e1e23c242 110
glebiuskv 0:2f0e1e23c242 111 for( i = 0; i < pwdlen; i++ )
glebiuskv 0:2f0e1e23c242 112 unipwd[i * 2 + 1] = pwd[i];
glebiuskv 0:2f0e1e23c242 113
glebiuskv 0:2f0e1e23c242 114 if( ( ret = mbedtls_pkcs12_derivation( key, keylen, unipwd, pwdlen * 2 + 2,
glebiuskv 0:2f0e1e23c242 115 salt.p, salt.len, md_type,
glebiuskv 0:2f0e1e23c242 116 MBEDTLS_PKCS12_DERIVE_KEY, iterations ) ) != 0 )
glebiuskv 0:2f0e1e23c242 117 {
glebiuskv 0:2f0e1e23c242 118 return( ret );
glebiuskv 0:2f0e1e23c242 119 }
glebiuskv 0:2f0e1e23c242 120
glebiuskv 0:2f0e1e23c242 121 if( iv == NULL || ivlen == 0 )
glebiuskv 0:2f0e1e23c242 122 return( 0 );
glebiuskv 0:2f0e1e23c242 123
glebiuskv 0:2f0e1e23c242 124 if( ( ret = mbedtls_pkcs12_derivation( iv, ivlen, unipwd, pwdlen * 2 + 2,
glebiuskv 0:2f0e1e23c242 125 salt.p, salt.len, md_type,
glebiuskv 0:2f0e1e23c242 126 MBEDTLS_PKCS12_DERIVE_IV, iterations ) ) != 0 )
glebiuskv 0:2f0e1e23c242 127 {
glebiuskv 0:2f0e1e23c242 128 return( ret );
glebiuskv 0:2f0e1e23c242 129 }
glebiuskv 0:2f0e1e23c242 130 return( 0 );
glebiuskv 0:2f0e1e23c242 131 }
glebiuskv 0:2f0e1e23c242 132
glebiuskv 0:2f0e1e23c242 133 #undef PKCS12_MAX_PWDLEN
glebiuskv 0:2f0e1e23c242 134
glebiuskv 0:2f0e1e23c242 135 int mbedtls_pkcs12_pbe_sha1_rc4_128( mbedtls_asn1_buf *pbe_params, int mode,
glebiuskv 0:2f0e1e23c242 136 const unsigned char *pwd, size_t pwdlen,
glebiuskv 0:2f0e1e23c242 137 const unsigned char *data, size_t len,
glebiuskv 0:2f0e1e23c242 138 unsigned char *output )
glebiuskv 0:2f0e1e23c242 139 {
glebiuskv 0:2f0e1e23c242 140 #if !defined(MBEDTLS_ARC4_C)
glebiuskv 0:2f0e1e23c242 141 ((void) pbe_params);
glebiuskv 0:2f0e1e23c242 142 ((void) mode);
glebiuskv 0:2f0e1e23c242 143 ((void) pwd);
glebiuskv 0:2f0e1e23c242 144 ((void) pwdlen);
glebiuskv 0:2f0e1e23c242 145 ((void) data);
glebiuskv 0:2f0e1e23c242 146 ((void) len);
glebiuskv 0:2f0e1e23c242 147 ((void) output);
glebiuskv 0:2f0e1e23c242 148 return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE );
glebiuskv 0:2f0e1e23c242 149 #else
glebiuskv 0:2f0e1e23c242 150 int ret;
glebiuskv 0:2f0e1e23c242 151 unsigned char key[16];
glebiuskv 0:2f0e1e23c242 152 mbedtls_arc4_context ctx;
glebiuskv 0:2f0e1e23c242 153 ((void) mode);
glebiuskv 0:2f0e1e23c242 154
glebiuskv 0:2f0e1e23c242 155 mbedtls_arc4_init( &ctx );
glebiuskv 0:2f0e1e23c242 156
glebiuskv 0:2f0e1e23c242 157 if( ( ret = pkcs12_pbe_derive_key_iv( pbe_params, MBEDTLS_MD_SHA1,
glebiuskv 0:2f0e1e23c242 158 pwd, pwdlen,
glebiuskv 0:2f0e1e23c242 159 key, 16, NULL, 0 ) ) != 0 )
glebiuskv 0:2f0e1e23c242 160 {
glebiuskv 0:2f0e1e23c242 161 return( ret );
glebiuskv 0:2f0e1e23c242 162 }
glebiuskv 0:2f0e1e23c242 163
glebiuskv 0:2f0e1e23c242 164 mbedtls_arc4_setup( &ctx, key, 16 );
glebiuskv 0:2f0e1e23c242 165 if( ( ret = mbedtls_arc4_crypt( &ctx, len, data, output ) ) != 0 )
glebiuskv 0:2f0e1e23c242 166 goto exit;
glebiuskv 0:2f0e1e23c242 167
glebiuskv 0:2f0e1e23c242 168 exit:
glebiuskv 0:2f0e1e23c242 169 mbedtls_zeroize( key, sizeof( key ) );
glebiuskv 0:2f0e1e23c242 170 mbedtls_arc4_free( &ctx );
glebiuskv 0:2f0e1e23c242 171
glebiuskv 0:2f0e1e23c242 172 return( ret );
glebiuskv 0:2f0e1e23c242 173 #endif /* MBEDTLS_ARC4_C */
glebiuskv 0:2f0e1e23c242 174 }
glebiuskv 0:2f0e1e23c242 175
glebiuskv 0:2f0e1e23c242 176 int mbedtls_pkcs12_pbe( mbedtls_asn1_buf *pbe_params, int mode,
glebiuskv 0:2f0e1e23c242 177 mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type,
glebiuskv 0:2f0e1e23c242 178 const unsigned char *pwd, size_t pwdlen,
glebiuskv 0:2f0e1e23c242 179 const unsigned char *data, size_t len,
glebiuskv 0:2f0e1e23c242 180 unsigned char *output )
glebiuskv 0:2f0e1e23c242 181 {
glebiuskv 0:2f0e1e23c242 182 int ret, keylen = 0;
glebiuskv 0:2f0e1e23c242 183 unsigned char key[32];
glebiuskv 0:2f0e1e23c242 184 unsigned char iv[16];
glebiuskv 0:2f0e1e23c242 185 const mbedtls_cipher_info_t *cipher_info;
glebiuskv 0:2f0e1e23c242 186 mbedtls_cipher_context_t cipher_ctx;
glebiuskv 0:2f0e1e23c242 187 size_t olen = 0;
glebiuskv 0:2f0e1e23c242 188
glebiuskv 0:2f0e1e23c242 189 cipher_info = mbedtls_cipher_info_from_type( cipher_type );
glebiuskv 0:2f0e1e23c242 190 if( cipher_info == NULL )
glebiuskv 0:2f0e1e23c242 191 return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE );
glebiuskv 0:2f0e1e23c242 192
glebiuskv 0:2f0e1e23c242 193 keylen = cipher_info->key_bitlen / 8;
glebiuskv 0:2f0e1e23c242 194
glebiuskv 0:2f0e1e23c242 195 if( ( ret = pkcs12_pbe_derive_key_iv( pbe_params, md_type, pwd, pwdlen,
glebiuskv 0:2f0e1e23c242 196 key, keylen,
glebiuskv 0:2f0e1e23c242 197 iv, cipher_info->iv_size ) ) != 0 )
glebiuskv 0:2f0e1e23c242 198 {
glebiuskv 0:2f0e1e23c242 199 return( ret );
glebiuskv 0:2f0e1e23c242 200 }
glebiuskv 0:2f0e1e23c242 201
glebiuskv 0:2f0e1e23c242 202 mbedtls_cipher_init( &cipher_ctx );
glebiuskv 0:2f0e1e23c242 203
glebiuskv 0:2f0e1e23c242 204 if( ( ret = mbedtls_cipher_setup( &cipher_ctx, cipher_info ) ) != 0 )
glebiuskv 0:2f0e1e23c242 205 goto exit;
glebiuskv 0:2f0e1e23c242 206
glebiuskv 0:2f0e1e23c242 207 if( ( ret = mbedtls_cipher_setkey( &cipher_ctx, key, 8 * keylen, (mbedtls_operation_t) mode ) ) != 0 )
glebiuskv 0:2f0e1e23c242 208 goto exit;
glebiuskv 0:2f0e1e23c242 209
glebiuskv 0:2f0e1e23c242 210 if( ( ret = mbedtls_cipher_set_iv( &cipher_ctx, iv, cipher_info->iv_size ) ) != 0 )
glebiuskv 0:2f0e1e23c242 211 goto exit;
glebiuskv 0:2f0e1e23c242 212
glebiuskv 0:2f0e1e23c242 213 if( ( ret = mbedtls_cipher_reset( &cipher_ctx ) ) != 0 )
glebiuskv 0:2f0e1e23c242 214 goto exit;
glebiuskv 0:2f0e1e23c242 215
glebiuskv 0:2f0e1e23c242 216 if( ( ret = mbedtls_cipher_update( &cipher_ctx, data, len,
glebiuskv 0:2f0e1e23c242 217 output, &olen ) ) != 0 )
glebiuskv 0:2f0e1e23c242 218 {
glebiuskv 0:2f0e1e23c242 219 goto exit;
glebiuskv 0:2f0e1e23c242 220 }
glebiuskv 0:2f0e1e23c242 221
glebiuskv 0:2f0e1e23c242 222 if( ( ret = mbedtls_cipher_finish( &cipher_ctx, output + olen, &olen ) ) != 0 )
glebiuskv 0:2f0e1e23c242 223 ret = MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH;
glebiuskv 0:2f0e1e23c242 224
glebiuskv 0:2f0e1e23c242 225 exit:
glebiuskv 0:2f0e1e23c242 226 mbedtls_zeroize( key, sizeof( key ) );
glebiuskv 0:2f0e1e23c242 227 mbedtls_zeroize( iv, sizeof( iv ) );
glebiuskv 0:2f0e1e23c242 228 mbedtls_cipher_free( &cipher_ctx );
glebiuskv 0:2f0e1e23c242 229
glebiuskv 0:2f0e1e23c242 230 return( ret );
glebiuskv 0:2f0e1e23c242 231 }
glebiuskv 0:2f0e1e23c242 232
glebiuskv 0:2f0e1e23c242 233 static void pkcs12_fill_buffer( unsigned char *data, size_t data_len,
glebiuskv 0:2f0e1e23c242 234 const unsigned char *filler, size_t fill_len )
glebiuskv 0:2f0e1e23c242 235 {
glebiuskv 0:2f0e1e23c242 236 unsigned char *p = data;
glebiuskv 0:2f0e1e23c242 237 size_t use_len;
glebiuskv 0:2f0e1e23c242 238
glebiuskv 0:2f0e1e23c242 239 while( data_len > 0 )
glebiuskv 0:2f0e1e23c242 240 {
glebiuskv 0:2f0e1e23c242 241 use_len = ( data_len > fill_len ) ? fill_len : data_len;
glebiuskv 0:2f0e1e23c242 242 memcpy( p, filler, use_len );
glebiuskv 0:2f0e1e23c242 243 p += use_len;
glebiuskv 0:2f0e1e23c242 244 data_len -= use_len;
glebiuskv 0:2f0e1e23c242 245 }
glebiuskv 0:2f0e1e23c242 246 }
glebiuskv 0:2f0e1e23c242 247
glebiuskv 0:2f0e1e23c242 248 int mbedtls_pkcs12_derivation( unsigned char *data, size_t datalen,
glebiuskv 0:2f0e1e23c242 249 const unsigned char *pwd, size_t pwdlen,
glebiuskv 0:2f0e1e23c242 250 const unsigned char *salt, size_t saltlen,
glebiuskv 0:2f0e1e23c242 251 mbedtls_md_type_t md_type, int id, int iterations )
glebiuskv 0:2f0e1e23c242 252 {
glebiuskv 0:2f0e1e23c242 253 int ret;
glebiuskv 0:2f0e1e23c242 254 unsigned int j;
glebiuskv 0:2f0e1e23c242 255
glebiuskv 0:2f0e1e23c242 256 unsigned char diversifier[128];
glebiuskv 0:2f0e1e23c242 257 unsigned char salt_block[128], pwd_block[128], hash_block[128];
glebiuskv 0:2f0e1e23c242 258 unsigned char hash_output[MBEDTLS_MD_MAX_SIZE];
glebiuskv 0:2f0e1e23c242 259 unsigned char *p;
glebiuskv 0:2f0e1e23c242 260 unsigned char c;
glebiuskv 0:2f0e1e23c242 261
glebiuskv 0:2f0e1e23c242 262 size_t hlen, use_len, v, i;
glebiuskv 0:2f0e1e23c242 263
glebiuskv 0:2f0e1e23c242 264 const mbedtls_md_info_t *md_info;
glebiuskv 0:2f0e1e23c242 265 mbedtls_md_context_t md_ctx;
glebiuskv 0:2f0e1e23c242 266
glebiuskv 0:2f0e1e23c242 267 // This version only allows max of 64 bytes of password or salt
glebiuskv 0:2f0e1e23c242 268 if( datalen > 128 || pwdlen > 64 || saltlen > 64 )
glebiuskv 0:2f0e1e23c242 269 return( MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA );
glebiuskv 0:2f0e1e23c242 270
glebiuskv 0:2f0e1e23c242 271 md_info = mbedtls_md_info_from_type( md_type );
glebiuskv 0:2f0e1e23c242 272 if( md_info == NULL )
glebiuskv 0:2f0e1e23c242 273 return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE );
glebiuskv 0:2f0e1e23c242 274
glebiuskv 0:2f0e1e23c242 275 mbedtls_md_init( &md_ctx );
glebiuskv 0:2f0e1e23c242 276
glebiuskv 0:2f0e1e23c242 277 if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 )
glebiuskv 0:2f0e1e23c242 278 return( ret );
glebiuskv 0:2f0e1e23c242 279 hlen = mbedtls_md_get_size( md_info );
glebiuskv 0:2f0e1e23c242 280
glebiuskv 0:2f0e1e23c242 281 if( hlen <= 32 )
glebiuskv 0:2f0e1e23c242 282 v = 64;
glebiuskv 0:2f0e1e23c242 283 else
glebiuskv 0:2f0e1e23c242 284 v = 128;
glebiuskv 0:2f0e1e23c242 285
glebiuskv 0:2f0e1e23c242 286 memset( diversifier, (unsigned char) id, v );
glebiuskv 0:2f0e1e23c242 287
glebiuskv 0:2f0e1e23c242 288 pkcs12_fill_buffer( salt_block, v, salt, saltlen );
glebiuskv 0:2f0e1e23c242 289 pkcs12_fill_buffer( pwd_block, v, pwd, pwdlen );
glebiuskv 0:2f0e1e23c242 290
glebiuskv 0:2f0e1e23c242 291 p = data;
glebiuskv 0:2f0e1e23c242 292 while( datalen > 0 )
glebiuskv 0:2f0e1e23c242 293 {
glebiuskv 0:2f0e1e23c242 294 // Calculate hash( diversifier || salt_block || pwd_block )
glebiuskv 0:2f0e1e23c242 295 if( ( ret = mbedtls_md_starts( &md_ctx ) ) != 0 )
glebiuskv 0:2f0e1e23c242 296 goto exit;
glebiuskv 0:2f0e1e23c242 297
glebiuskv 0:2f0e1e23c242 298 if( ( ret = mbedtls_md_update( &md_ctx, diversifier, v ) ) != 0 )
glebiuskv 0:2f0e1e23c242 299 goto exit;
glebiuskv 0:2f0e1e23c242 300
glebiuskv 0:2f0e1e23c242 301 if( ( ret = mbedtls_md_update( &md_ctx, salt_block, v ) ) != 0 )
glebiuskv 0:2f0e1e23c242 302 goto exit;
glebiuskv 0:2f0e1e23c242 303
glebiuskv 0:2f0e1e23c242 304 if( ( ret = mbedtls_md_update( &md_ctx, pwd_block, v ) ) != 0 )
glebiuskv 0:2f0e1e23c242 305 goto exit;
glebiuskv 0:2f0e1e23c242 306
glebiuskv 0:2f0e1e23c242 307 if( ( ret = mbedtls_md_finish( &md_ctx, hash_output ) ) != 0 )
glebiuskv 0:2f0e1e23c242 308 goto exit;
glebiuskv 0:2f0e1e23c242 309
glebiuskv 0:2f0e1e23c242 310 // Perform remaining ( iterations - 1 ) recursive hash calculations
glebiuskv 0:2f0e1e23c242 311 for( i = 1; i < (size_t) iterations; i++ )
glebiuskv 0:2f0e1e23c242 312 {
glebiuskv 0:2f0e1e23c242 313 if( ( ret = mbedtls_md( md_info, hash_output, hlen, hash_output ) ) != 0 )
glebiuskv 0:2f0e1e23c242 314 goto exit;
glebiuskv 0:2f0e1e23c242 315 }
glebiuskv 0:2f0e1e23c242 316
glebiuskv 0:2f0e1e23c242 317 use_len = ( datalen > hlen ) ? hlen : datalen;
glebiuskv 0:2f0e1e23c242 318 memcpy( p, hash_output, use_len );
glebiuskv 0:2f0e1e23c242 319 datalen -= use_len;
glebiuskv 0:2f0e1e23c242 320 p += use_len;
glebiuskv 0:2f0e1e23c242 321
glebiuskv 0:2f0e1e23c242 322 if( datalen == 0 )
glebiuskv 0:2f0e1e23c242 323 break;
glebiuskv 0:2f0e1e23c242 324
glebiuskv 0:2f0e1e23c242 325 // Concatenating copies of hash_output into hash_block (B)
glebiuskv 0:2f0e1e23c242 326 pkcs12_fill_buffer( hash_block, v, hash_output, hlen );
glebiuskv 0:2f0e1e23c242 327
glebiuskv 0:2f0e1e23c242 328 // B += 1
glebiuskv 0:2f0e1e23c242 329 for( i = v; i > 0; i-- )
glebiuskv 0:2f0e1e23c242 330 if( ++hash_block[i - 1] != 0 )
glebiuskv 0:2f0e1e23c242 331 break;
glebiuskv 0:2f0e1e23c242 332
glebiuskv 0:2f0e1e23c242 333 // salt_block += B
glebiuskv 0:2f0e1e23c242 334 c = 0;
glebiuskv 0:2f0e1e23c242 335 for( i = v; i > 0; i-- )
glebiuskv 0:2f0e1e23c242 336 {
glebiuskv 0:2f0e1e23c242 337 j = salt_block[i - 1] + hash_block[i - 1] + c;
glebiuskv 0:2f0e1e23c242 338 c = (unsigned char) (j >> 8);
glebiuskv 0:2f0e1e23c242 339 salt_block[i - 1] = j & 0xFF;
glebiuskv 0:2f0e1e23c242 340 }
glebiuskv 0:2f0e1e23c242 341
glebiuskv 0:2f0e1e23c242 342 // pwd_block += B
glebiuskv 0:2f0e1e23c242 343 c = 0;
glebiuskv 0:2f0e1e23c242 344 for( i = v; i > 0; i-- )
glebiuskv 0:2f0e1e23c242 345 {
glebiuskv 0:2f0e1e23c242 346 j = pwd_block[i - 1] + hash_block[i - 1] + c;
glebiuskv 0:2f0e1e23c242 347 c = (unsigned char) (j >> 8);
glebiuskv 0:2f0e1e23c242 348 pwd_block[i - 1] = j & 0xFF;
glebiuskv 0:2f0e1e23c242 349 }
glebiuskv 0:2f0e1e23c242 350 }
glebiuskv 0:2f0e1e23c242 351
glebiuskv 0:2f0e1e23c242 352 ret = 0;
glebiuskv 0:2f0e1e23c242 353
glebiuskv 0:2f0e1e23c242 354 exit:
glebiuskv 0:2f0e1e23c242 355 mbedtls_zeroize( salt_block, sizeof( salt_block ) );
glebiuskv 0:2f0e1e23c242 356 mbedtls_zeroize( pwd_block, sizeof( pwd_block ) );
glebiuskv 0:2f0e1e23c242 357 mbedtls_zeroize( hash_block, sizeof( hash_block ) );
glebiuskv 0:2f0e1e23c242 358 mbedtls_zeroize( hash_output, sizeof( hash_output ) );
glebiuskv 0:2f0e1e23c242 359
glebiuskv 0:2f0e1e23c242 360 mbedtls_md_free( &md_ctx );
glebiuskv 0:2f0e1e23c242 361
glebiuskv 0:2f0e1e23c242 362 return( ret );
glebiuskv 0:2f0e1e23c242 363 }
glebiuskv 0:2f0e1e23c242 364
glebiuskv 0:2f0e1e23c242 365 #endif /* MBEDTLS_PKCS12_C */