4 * \brief PKCS#5 functions
6 * \author Mathias Olsson <mathias@kompetensum.com>
8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
9 * SPDX-License-Identifier: Apache-2.0
11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
12 * not use this file except in compliance with the License.
13 * You may obtain a copy of the License at
15 * http://www.apache.org/licenses/LICENSE-2.0
17 * Unless required by applicable law or agreed to in writing, software
18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20 * See the License for the specific language governing permissions and
21 * limitations under the License.
23 * This file is part of mbed TLS (https://tls.mbed.org)
26 * PKCS#5 includes PBKDF2 and more
28 * http://tools.ietf.org/html/rfc2898 (Specification)
29 * http://tools.ietf.org/html/rfc6070 (Test vectors)
32 #if !defined(MBEDTLS_CONFIG_FILE)
33 #include "mbedtls/config.h"
35 #include MBEDTLS_CONFIG_FILE
38 #if defined(MBEDTLS_PKCS5_C)
40 #include "mbedtls/pkcs5.h"
42 #if defined(MBEDTLS_ASN1_PARSE_C)
43 #include "mbedtls/asn1.h"
44 #include "mbedtls/cipher.h"
45 #include "mbedtls/oid.h"
46 #endif /* MBEDTLS_ASN1_PARSE_C */
50 #if defined(MBEDTLS_PLATFORM_C)
51 #include "mbedtls/platform.h"
54 #define mbedtls_printf printf
57 #if defined(MBEDTLS_ASN1_PARSE_C)
58 static int pkcs5_parse_pbkdf2_params( const mbedtls_asn1_buf *params,
59 mbedtls_asn1_buf *salt, int *iterations,
60 int *keylen, mbedtls_md_type_t *md_type )
63 mbedtls_asn1_buf prf_alg_oid;
64 unsigned char *p = params->p;
65 const unsigned char *end = params->p + params->len;
67 if( params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
68 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT +
69 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
71 * PBKDF2-params ::= SEQUENCE {
73 * iterationCount INTEGER,
74 * keyLength INTEGER OPTIONAL
75 * prf AlgorithmIdentifier DEFAULT algid-hmacWithSHA1
79 if( ( ret = mbedtls_asn1_get_tag( &p, end, &salt->len,
80 MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
81 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
86 if( ( ret = mbedtls_asn1_get_int( &p, end, iterations ) ) != 0 )
87 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
92 if( ( ret = mbedtls_asn1_get_int( &p, end, keylen ) ) != 0 )
94 if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
95 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
101 if( ( ret = mbedtls_asn1_get_alg_null( &p, end, &prf_alg_oid ) ) != 0 )
102 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
104 if( mbedtls_oid_get_md_hmac( &prf_alg_oid, md_type ) != 0 )
105 return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
108 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT +
109 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
114 int mbedtls_pkcs5_pbes2( const mbedtls_asn1_buf *pbe_params, int mode,
115 const unsigned char *pwd, size_t pwdlen,
116 const unsigned char *data, size_t datalen,
117 unsigned char *output )
119 int ret, iterations = 0, keylen = 0;
120 unsigned char *p, *end;
121 mbedtls_asn1_buf kdf_alg_oid, enc_scheme_oid, kdf_alg_params, enc_scheme_params;
122 mbedtls_asn1_buf salt;
123 mbedtls_md_type_t md_type = MBEDTLS_MD_SHA1;
124 unsigned char key[32], iv[32];
126 const mbedtls_md_info_t *md_info;
127 const mbedtls_cipher_info_t *cipher_info;
128 mbedtls_md_context_t md_ctx;
129 mbedtls_cipher_type_t cipher_alg;
130 mbedtls_cipher_context_t cipher_ctx;
133 end = p + pbe_params->len;
136 * PBES2-params ::= SEQUENCE {
137 * keyDerivationFunc AlgorithmIdentifier {{PBES2-KDFs}},
138 * encryptionScheme AlgorithmIdentifier {{PBES2-Encs}}
141 if( pbe_params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
142 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT +
143 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
145 if( ( ret = mbedtls_asn1_get_alg( &p, end, &kdf_alg_oid,
146 &kdf_alg_params ) ) != 0 )
147 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
149 // Only PBKDF2 supported at the moment
151 if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBKDF2, &kdf_alg_oid ) != 0 )
152 return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
154 if( ( ret = pkcs5_parse_pbkdf2_params( &kdf_alg_params,
155 &salt, &iterations, &keylen,
161 md_info = mbedtls_md_info_from_type( md_type );
162 if( md_info == NULL )
163 return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
165 if( ( ret = mbedtls_asn1_get_alg( &p, end, &enc_scheme_oid,
166 &enc_scheme_params ) ) != 0 )
168 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
171 if( mbedtls_oid_get_cipher_alg( &enc_scheme_oid, &cipher_alg ) != 0 )
172 return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
174 cipher_info = mbedtls_cipher_info_from_type( cipher_alg );
175 if( cipher_info == NULL )
176 return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
179 * The value of keylen from pkcs5_parse_pbkdf2_params() is ignored
180 * since it is optional and we don't know if it was set or not
182 keylen = cipher_info->key_bitlen / 8;
184 if( enc_scheme_params.tag != MBEDTLS_ASN1_OCTET_STRING ||
185 enc_scheme_params.len != cipher_info->iv_size )
187 return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT );
190 mbedtls_md_init( &md_ctx );
191 mbedtls_cipher_init( &cipher_ctx );
193 memcpy( iv, enc_scheme_params.p, enc_scheme_params.len );
195 if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
198 if( ( ret = mbedtls_pkcs5_pbkdf2_hmac( &md_ctx, pwd, pwdlen, salt.p, salt.len,
199 iterations, keylen, key ) ) != 0 )
204 if( ( ret = mbedtls_cipher_setup( &cipher_ctx, cipher_info ) ) != 0 )
207 if( ( ret = mbedtls_cipher_setkey( &cipher_ctx, key, 8 * keylen,
208 (mbedtls_operation_t) mode ) ) != 0 )
211 if( ( ret = mbedtls_cipher_crypt( &cipher_ctx, iv, enc_scheme_params.len,
212 data, datalen, output, &olen ) ) != 0 )
213 ret = MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH;
216 mbedtls_md_free( &md_ctx );
217 mbedtls_cipher_free( &cipher_ctx );
221 #endif /* MBEDTLS_ASN1_PARSE_C */
223 int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx,
224 const unsigned char *password,
225 size_t plen, const unsigned char *salt, size_t slen,
226 unsigned int iteration_count,
227 uint32_t key_length, unsigned char *output )
231 unsigned char md1[MBEDTLS_MD_MAX_SIZE];
232 unsigned char work[MBEDTLS_MD_MAX_SIZE];
233 unsigned char md_size = mbedtls_md_get_size( ctx->md_info );
235 unsigned char *out_p = output;
236 unsigned char counter[4];
238 memset( counter, 0, 4 );
241 #if UINT_MAX > 0xFFFFFFFF
242 if( iteration_count > 0xFFFFFFFF )
243 return( MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA );
248 // U1 ends up in work
250 if( ( ret = mbedtls_md_hmac_starts( ctx, password, plen ) ) != 0 )
253 if( ( ret = mbedtls_md_hmac_update( ctx, salt, slen ) ) != 0 )
256 if( ( ret = mbedtls_md_hmac_update( ctx, counter, 4 ) ) != 0 )
259 if( ( ret = mbedtls_md_hmac_finish( ctx, work ) ) != 0 )
262 memcpy( md1, work, md_size );
264 for( i = 1; i < iteration_count; i++ )
268 if( ( ret = mbedtls_md_hmac_starts( ctx, password, plen ) ) != 0 )
271 if( ( ret = mbedtls_md_hmac_update( ctx, md1, md_size ) ) != 0 )
274 if( ( ret = mbedtls_md_hmac_finish( ctx, md1 ) ) != 0 )
279 for( j = 0; j < md_size; j++ )
283 use_len = ( key_length < md_size ) ? key_length : md_size;
284 memcpy( out_p, work, use_len );
286 key_length -= (uint32_t) use_len;
289 for( i = 4; i > 0; i-- )
290 if( ++counter[i - 1] != 0 )
297 #if defined(MBEDTLS_SELF_TEST)
299 #if !defined(MBEDTLS_SHA1_C)
300 int mbedtls_pkcs5_self_test( int verbose )
303 mbedtls_printf( " PBKDF2 (SHA1): skipped\n\n" );
311 static const size_t plen_test_data[MAX_TESTS] =
314 static const unsigned char password_test_data[MAX_TESTS][32] =
319 "passwordPASSWORDpassword",
323 static const size_t slen_test_data[MAX_TESTS] =
326 static const unsigned char salt_test_data[MAX_TESTS][40] =
331 "saltSALTsaltSALTsaltSALTsaltSALTsalt",
335 static const uint32_t it_cnt_test_data[MAX_TESTS] =
336 { 1, 2, 4096, 4096, 4096 };
338 static const uint32_t key_len_test_data[MAX_TESTS] =
339 { 20, 20, 20, 25, 16 };
341 static const unsigned char result_key_test_data[MAX_TESTS][32] =
343 { 0x0c, 0x60, 0xc8, 0x0f, 0x96, 0x1f, 0x0e, 0x71,
344 0xf3, 0xa9, 0xb5, 0x24, 0xaf, 0x60, 0x12, 0x06,
345 0x2f, 0xe0, 0x37, 0xa6 },
346 { 0xea, 0x6c, 0x01, 0x4d, 0xc7, 0x2d, 0x6f, 0x8c,
347 0xcd, 0x1e, 0xd9, 0x2a, 0xce, 0x1d, 0x41, 0xf0,
348 0xd8, 0xde, 0x89, 0x57 },
349 { 0x4b, 0x00, 0x79, 0x01, 0xb7, 0x65, 0x48, 0x9a,
350 0xbe, 0xad, 0x49, 0xd9, 0x26, 0xf7, 0x21, 0xd0,
351 0x65, 0xa4, 0x29, 0xc1 },
352 { 0x3d, 0x2e, 0xec, 0x4f, 0xe4, 0x1c, 0x84, 0x9b,
353 0x80, 0xc8, 0xd8, 0x36, 0x62, 0xc0, 0xe4, 0x4a,
354 0x8b, 0x29, 0x1a, 0x96, 0x4c, 0xf2, 0xf0, 0x70,
356 { 0x56, 0xfa, 0x6a, 0xa7, 0x55, 0x48, 0x09, 0x9d,
357 0xcc, 0x37, 0xd7, 0xf0, 0x34, 0x25, 0xe0, 0xc3 },
360 int mbedtls_pkcs5_self_test( int verbose )
362 mbedtls_md_context_t sha1_ctx;
363 const mbedtls_md_info_t *info_sha1;
365 unsigned char key[64];
367 mbedtls_md_init( &sha1_ctx );
369 info_sha1 = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
370 if( info_sha1 == NULL )
376 if( ( ret = mbedtls_md_setup( &sha1_ctx, info_sha1, 1 ) ) != 0 )
382 for( i = 0; i < MAX_TESTS; i++ )
385 mbedtls_printf( " PBKDF2 (SHA1) #%d: ", i );
387 ret = mbedtls_pkcs5_pbkdf2_hmac( &sha1_ctx, password_test_data[i],
388 plen_test_data[i], salt_test_data[i],
389 slen_test_data[i], it_cnt_test_data[i],
390 key_len_test_data[i], key );
392 memcmp( result_key_test_data[i], key, key_len_test_data[i] ) != 0 )
395 mbedtls_printf( "failed\n" );
402 mbedtls_printf( "passed\n" );
406 mbedtls_printf( "\n" );
409 mbedtls_md_free( &sha1_ctx );
413 #endif /* MBEDTLS_SHA1_C */
415 #endif /* MBEDTLS_SELF_TEST */
417 #endif /* MBEDTLS_PKCS5_C */