2 * PKCS#12 Personal Information Exchange Syntax
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4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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5 * SPDX-License-Identifier: Apache-2.0
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7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
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8 * not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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19 * This file is part of mbed TLS (https://tls.mbed.org)
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22 * The PKCS #12 Personal Information Exchange Syntax Standard v1.1
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24 * http://www.rsa.com/rsalabs/pkcs/files/h11301-wp-pkcs-12v1-1-personal-information-exchange-syntax.pdf
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25 * ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1-1.asn
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28 #if !defined(MBEDTLS_CONFIG_FILE)
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29 #include "mbedtls/config.h"
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31 #include MBEDTLS_CONFIG_FILE
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34 #if defined(MBEDTLS_PKCS12_C)
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36 #include "mbedtls/pkcs12.h"
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37 #include "mbedtls/asn1.h"
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38 #include "mbedtls/cipher.h"
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39 #include "mbedtls/platform_util.h"
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43 #if defined(MBEDTLS_ARC4_C)
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44 #include "mbedtls/arc4.h"
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47 #if defined(MBEDTLS_DES_C)
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48 #include "mbedtls/des.h"
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51 #if defined(MBEDTLS_ASN1_PARSE_C)
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53 static int pkcs12_parse_pbe_params( mbedtls_asn1_buf *params,
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54 mbedtls_asn1_buf *salt, int *iterations )
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57 unsigned char **p = ¶ms->p;
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58 const unsigned char *end = params->p + params->len;
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61 * pkcs-12PbeParams ::= SEQUENCE {
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62 * salt OCTET STRING,
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63 * iterations INTEGER
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67 if( params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
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68 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT +
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69 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
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71 if( ( ret = mbedtls_asn1_get_tag( p, end, &salt->len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
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72 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + ret );
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77 if( ( ret = mbedtls_asn1_get_int( p, end, iterations ) ) != 0 )
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78 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + ret );
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81 return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT +
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82 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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87 #define PKCS12_MAX_PWDLEN 128
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89 static int pkcs12_pbe_derive_key_iv( mbedtls_asn1_buf *pbe_params, mbedtls_md_type_t md_type,
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90 const unsigned char *pwd, size_t pwdlen,
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91 unsigned char *key, size_t keylen,
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92 unsigned char *iv, size_t ivlen )
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94 int ret, iterations = 0;
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95 mbedtls_asn1_buf salt;
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97 unsigned char unipwd[PKCS12_MAX_PWDLEN * 2 + 2];
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99 if( pwdlen > PKCS12_MAX_PWDLEN )
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100 return( MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA );
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102 memset( &salt, 0, sizeof(mbedtls_asn1_buf) );
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103 memset( &unipwd, 0, sizeof(unipwd) );
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105 if( ( ret = pkcs12_parse_pbe_params( pbe_params, &salt,
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106 &iterations ) ) != 0 )
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109 for( i = 0; i < pwdlen; i++ )
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110 unipwd[i * 2 + 1] = pwd[i];
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112 if( ( ret = mbedtls_pkcs12_derivation( key, keylen, unipwd, pwdlen * 2 + 2,
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113 salt.p, salt.len, md_type,
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114 MBEDTLS_PKCS12_DERIVE_KEY, iterations ) ) != 0 )
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119 if( iv == NULL || ivlen == 0 )
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122 if( ( ret = mbedtls_pkcs12_derivation( iv, ivlen, unipwd, pwdlen * 2 + 2,
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123 salt.p, salt.len, md_type,
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124 MBEDTLS_PKCS12_DERIVE_IV, iterations ) ) != 0 )
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131 #undef PKCS12_MAX_PWDLEN
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133 int mbedtls_pkcs12_pbe_sha1_rc4_128( mbedtls_asn1_buf *pbe_params, int mode,
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134 const unsigned char *pwd, size_t pwdlen,
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135 const unsigned char *data, size_t len,
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136 unsigned char *output )
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138 #if !defined(MBEDTLS_ARC4_C)
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139 ((void) pbe_params);
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146 return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE );
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149 unsigned char key[16];
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150 mbedtls_arc4_context ctx;
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153 mbedtls_arc4_init( &ctx );
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155 if( ( ret = pkcs12_pbe_derive_key_iv( pbe_params, MBEDTLS_MD_SHA1,
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157 key, 16, NULL, 0 ) ) != 0 )
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162 mbedtls_arc4_setup( &ctx, key, 16 );
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163 if( ( ret = mbedtls_arc4_crypt( &ctx, len, data, output ) ) != 0 )
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167 mbedtls_platform_zeroize( key, sizeof( key ) );
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168 mbedtls_arc4_free( &ctx );
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171 #endif /* MBEDTLS_ARC4_C */
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174 int mbedtls_pkcs12_pbe( mbedtls_asn1_buf *pbe_params, int mode,
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175 mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type,
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176 const unsigned char *pwd, size_t pwdlen,
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177 const unsigned char *data, size_t len,
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178 unsigned char *output )
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180 int ret, keylen = 0;
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181 unsigned char key[32];
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182 unsigned char iv[16];
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183 const mbedtls_cipher_info_t *cipher_info;
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184 mbedtls_cipher_context_t cipher_ctx;
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187 cipher_info = mbedtls_cipher_info_from_type( cipher_type );
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188 if( cipher_info == NULL )
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189 return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE );
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191 keylen = cipher_info->key_bitlen / 8;
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193 if( ( ret = pkcs12_pbe_derive_key_iv( pbe_params, md_type, pwd, pwdlen,
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195 iv, cipher_info->iv_size ) ) != 0 )
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200 mbedtls_cipher_init( &cipher_ctx );
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202 if( ( ret = mbedtls_cipher_setup( &cipher_ctx, cipher_info ) ) != 0 )
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205 if( ( ret = mbedtls_cipher_setkey( &cipher_ctx, key, 8 * keylen, (mbedtls_operation_t) mode ) ) != 0 )
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208 if( ( ret = mbedtls_cipher_set_iv( &cipher_ctx, iv, cipher_info->iv_size ) ) != 0 )
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211 if( ( ret = mbedtls_cipher_reset( &cipher_ctx ) ) != 0 )
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214 if( ( ret = mbedtls_cipher_update( &cipher_ctx, data, len,
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215 output, &olen ) ) != 0 )
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220 if( ( ret = mbedtls_cipher_finish( &cipher_ctx, output + olen, &olen ) ) != 0 )
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221 ret = MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH;
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224 mbedtls_platform_zeroize( key, sizeof( key ) );
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225 mbedtls_platform_zeroize( iv, sizeof( iv ) );
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226 mbedtls_cipher_free( &cipher_ctx );
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231 #endif /* MBEDTLS_ASN1_PARSE_C */
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233 static void pkcs12_fill_buffer( unsigned char *data, size_t data_len,
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234 const unsigned char *filler, size_t fill_len )
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236 unsigned char *p = data;
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239 while( data_len > 0 )
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241 use_len = ( data_len > fill_len ) ? fill_len : data_len;
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242 memcpy( p, filler, use_len );
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244 data_len -= use_len;
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248 int mbedtls_pkcs12_derivation( unsigned char *data, size_t datalen,
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249 const unsigned char *pwd, size_t pwdlen,
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250 const unsigned char *salt, size_t saltlen,
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251 mbedtls_md_type_t md_type, int id, int iterations )
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256 unsigned char diversifier[128];
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257 unsigned char salt_block[128], pwd_block[128], hash_block[128];
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258 unsigned char hash_output[MBEDTLS_MD_MAX_SIZE];
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262 size_t hlen, use_len, v, i;
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264 const mbedtls_md_info_t *md_info;
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265 mbedtls_md_context_t md_ctx;
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267 // This version only allows max of 64 bytes of password or salt
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268 if( datalen > 128 || pwdlen > 64 || saltlen > 64 )
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269 return( MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA );
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271 md_info = mbedtls_md_info_from_type( md_type );
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272 if( md_info == NULL )
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273 return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE );
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275 mbedtls_md_init( &md_ctx );
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277 if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 )
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279 hlen = mbedtls_md_get_size( md_info );
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286 memset( diversifier, (unsigned char) id, v );
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288 pkcs12_fill_buffer( salt_block, v, salt, saltlen );
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289 pkcs12_fill_buffer( pwd_block, v, pwd, pwdlen );
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292 while( datalen > 0 )
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294 // Calculate hash( diversifier || salt_block || pwd_block )
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295 if( ( ret = mbedtls_md_starts( &md_ctx ) ) != 0 )
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298 if( ( ret = mbedtls_md_update( &md_ctx, diversifier, v ) ) != 0 )
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301 if( ( ret = mbedtls_md_update( &md_ctx, salt_block, v ) ) != 0 )
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304 if( ( ret = mbedtls_md_update( &md_ctx, pwd_block, v ) ) != 0 )
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307 if( ( ret = mbedtls_md_finish( &md_ctx, hash_output ) ) != 0 )
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310 // Perform remaining ( iterations - 1 ) recursive hash calculations
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311 for( i = 1; i < (size_t) iterations; i++ )
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313 if( ( ret = mbedtls_md( md_info, hash_output, hlen, hash_output ) ) != 0 )
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317 use_len = ( datalen > hlen ) ? hlen : datalen;
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318 memcpy( p, hash_output, use_len );
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319 datalen -= use_len;
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325 // Concatenating copies of hash_output into hash_block (B)
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326 pkcs12_fill_buffer( hash_block, v, hash_output, hlen );
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329 for( i = v; i > 0; i-- )
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330 if( ++hash_block[i - 1] != 0 )
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335 for( i = v; i > 0; i-- )
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337 j = salt_block[i - 1] + hash_block[i - 1] + c;
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338 c = (unsigned char) (j >> 8);
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339 salt_block[i - 1] = j & 0xFF;
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344 for( i = v; i > 0; i-- )
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346 j = pwd_block[i - 1] + hash_block[i - 1] + c;
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347 c = (unsigned char) (j >> 8);
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348 pwd_block[i - 1] = j & 0xFF;
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355 mbedtls_platform_zeroize( salt_block, sizeof( salt_block ) );
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356 mbedtls_platform_zeroize( pwd_block, sizeof( pwd_block ) );
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357 mbedtls_platform_zeroize( hash_block, sizeof( hash_block ) );
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358 mbedtls_platform_zeroize( hash_output, sizeof( hash_output ) );
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360 mbedtls_md_free( &md_ctx );
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365 #endif /* MBEDTLS_PKCS12_C */
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