Maxim nexpaq
Preliminary main mbed library for nexpaq development
Diff: features/mbedtls/src/pkcs5.c
- Revision:
- 0:6c56fb4bc5f0
diff -r 000000000000 -r 6c56fb4bc5f0 features/mbedtls/src/pkcs5.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/features/mbedtls/src/pkcs5.c Fri Nov 04 20:27:58 2016 +0000
@@ -0,0 +1,405 @@
+/**
+ * \file pkcs5.c
+ *
+ * \brief PKCS#5 functions
+ *
+ * \author Mathias Olsson <mathias@kompetensum.com>
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+/*
+ * PKCS#5 includes PBKDF2 and more
+ *
+ * http://tools.ietf.org/html/rfc2898 (Specification)
+ * http://tools.ietf.org/html/rfc6070 (Test vectors)
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_PKCS5_C)
+
+#include "mbedtls/pkcs5.h"
+#include "mbedtls/asn1.h"
+#include "mbedtls/cipher.h"
+#include "mbedtls/oid.h"
+
+#include <string.h>
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#include <stdio.h>
+#define mbedtls_printf printf
+#endif
+
+static int pkcs5_parse_pbkdf2_params( const mbedtls_asn1_buf *params,
+ mbedtls_asn1_buf *salt, int *iterations,
+ int *keylen, mbedtls_md_type_t *md_type )
+{
+ int ret;
+ mbedtls_asn1_buf prf_alg_oid;
+ unsigned char *p = params->p;
+ const unsigned char *end = params->p + params->len;
+
+ if( params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT +
+ MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
+ /*
+ * PBKDF2-params ::= SEQUENCE {
+ * salt OCTET STRING,
+ * iterationCount INTEGER,
+ * keyLength INTEGER OPTIONAL
+ * prf AlgorithmIdentifier DEFAULT algid-hmacWithSHA1
+ * }
+ *
+ */
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &salt->len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
+
+ salt->p = p;
+ p += salt->len;
+
+ if( ( ret = mbedtls_asn1_get_int( &p, end, iterations ) ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
+
+ if( p == end )
+ return( 0 );
+
+ if( ( ret = mbedtls_asn1_get_int( &p, end, keylen ) ) != 0 )
+ {
+ if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
+ }
+
+ if( p == end )
+ return( 0 );
+
+ if( ( ret = mbedtls_asn1_get_alg_null( &p, end, &prf_alg_oid ) ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
+
+ if( MBEDTLS_OID_CMP( MBEDTLS_OID_HMAC_SHA1, &prf_alg_oid ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
+
+ *md_type = MBEDTLS_MD_SHA1;
+
+ if( p != end )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+
+ return( 0 );
+}
+
+int mbedtls_pkcs5_pbes2( const mbedtls_asn1_buf *pbe_params, int mode,
+ const unsigned char *pwd, size_t pwdlen,
+ const unsigned char *data, size_t datalen,
+ unsigned char *output )
+{
+ int ret, iterations = 0, keylen = 0;
+ unsigned char *p, *end;
+ mbedtls_asn1_buf kdf_alg_oid, enc_scheme_oid, kdf_alg_params, enc_scheme_params;
+ mbedtls_asn1_buf salt;
+ mbedtls_md_type_t md_type = MBEDTLS_MD_SHA1;
+ unsigned char key[32], iv[32];
+ size_t olen = 0;
+ const mbedtls_md_info_t *md_info;
+ const mbedtls_cipher_info_t *cipher_info;
+ mbedtls_md_context_t md_ctx;
+ mbedtls_cipher_type_t cipher_alg;
+ mbedtls_cipher_context_t cipher_ctx;
+
+ p = pbe_params->p;
+ end = p + pbe_params->len;
+
+ /*
+ * PBES2-params ::= SEQUENCE {
+ * keyDerivationFunc AlgorithmIdentifier {{PBES2-KDFs}},
+ * encryptionScheme AlgorithmIdentifier {{PBES2-Encs}}
+ * }
+ */
+ if( pbe_params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT +
+ MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
+
+ if( ( ret = mbedtls_asn1_get_alg( &p, end, &kdf_alg_oid, &kdf_alg_params ) ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
+
+ // Only PBKDF2 supported at the moment
+ //
+ if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBKDF2, &kdf_alg_oid ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
+
+ if( ( ret = pkcs5_parse_pbkdf2_params( &kdf_alg_params,
+ &salt, &iterations, &keylen,
+ &md_type ) ) != 0 )
+ {
+ return( ret );
+ }
+
+ md_info = mbedtls_md_info_from_type( md_type );
+ if( md_info == NULL )
+ return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
+
+ if( ( ret = mbedtls_asn1_get_alg( &p, end, &enc_scheme_oid,
+ &enc_scheme_params ) ) != 0 )
+ {
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT + ret );
+ }
+
+ if( mbedtls_oid_get_cipher_alg( &enc_scheme_oid, &cipher_alg ) != 0 )
+ return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
+
+ cipher_info = mbedtls_cipher_info_from_type( cipher_alg );
+ if( cipher_info == NULL )
+ return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
+
+ /*
+ * The value of keylen from pkcs5_parse_pbkdf2_params() is ignored
+ * since it is optional and we don't know if it was set or not
+ */
+ keylen = cipher_info->key_bitlen / 8;
+
+ if( enc_scheme_params.tag != MBEDTLS_ASN1_OCTET_STRING ||
+ enc_scheme_params.len != cipher_info->iv_size )
+ {
+ return( MBEDTLS_ERR_PKCS5_INVALID_FORMAT );
+ }
+
+ mbedtls_md_init( &md_ctx );
+ mbedtls_cipher_init( &cipher_ctx );
+
+ memcpy( iv, enc_scheme_params.p, enc_scheme_params.len );
+
+ if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
+ goto exit;
+
+ if( ( ret = mbedtls_pkcs5_pbkdf2_hmac( &md_ctx, pwd, pwdlen, salt.p, salt.len,
+ iterations, keylen, key ) ) != 0 )
+ {
+ goto exit;
+ }
+
+ if( ( ret = mbedtls_cipher_setup( &cipher_ctx, cipher_info ) ) != 0 )
+ goto exit;
+
+ if( ( ret = mbedtls_cipher_setkey( &cipher_ctx, key, 8 * keylen, (mbedtls_operation_t) mode ) ) != 0 )
+ goto exit;
+
+ if( ( ret = mbedtls_cipher_crypt( &cipher_ctx, iv, enc_scheme_params.len,
+ data, datalen, output, &olen ) ) != 0 )
+ ret = MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH;
+
+exit:
+ mbedtls_md_free( &md_ctx );
+ mbedtls_cipher_free( &cipher_ctx );
+
+ return( ret );
+}
+
+int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *password,
+ size_t plen, const unsigned char *salt, size_t slen,
+ unsigned int iteration_count,
+ uint32_t key_length, unsigned char *output )
+{
+ int ret, j;
+ unsigned int i;
+ unsigned char md1[MBEDTLS_MD_MAX_SIZE];
+ unsigned char work[MBEDTLS_MD_MAX_SIZE];
+ unsigned char md_size = mbedtls_md_get_size( ctx->md_info );
+ size_t use_len;
+ unsigned char *out_p = output;
+ unsigned char counter[4];
+
+ memset( counter, 0, 4 );
+ counter[3] = 1;
+
+ if( iteration_count > 0xFFFFFFFF )
+ return( MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA );
+
+ while( key_length )
+ {
+ // U1 ends up in work
+ //
+ if( ( ret = mbedtls_md_hmac_starts( ctx, password, plen ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md_hmac_update( ctx, salt, slen ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md_hmac_update( ctx, counter, 4 ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md_hmac_finish( ctx, work ) ) != 0 )
+ return( ret );
+
+ memcpy( md1, work, md_size );
+
+ for( i = 1; i < iteration_count; i++ )
+ {
+ // U2 ends up in md1
+ //
+ if( ( ret = mbedtls_md_hmac_starts( ctx, password, plen ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md_hmac_update( ctx, md1, md_size ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md_hmac_finish( ctx, md1 ) ) != 0 )
+ return( ret );
+
+ // U1 xor U2
+ //
+ for( j = 0; j < md_size; j++ )
+ work[j] ^= md1[j];
+ }
+
+ use_len = ( key_length < md_size ) ? key_length : md_size;
+ memcpy( out_p, work, use_len );
+
+ key_length -= (uint32_t) use_len;
+ out_p += use_len;
+
+ for( i = 4; i > 0; i-- )
+ if( ++counter[i - 1] != 0 )
+ break;
+ }
+
+ return( 0 );
+}
+
+#if defined(MBEDTLS_SELF_TEST)
+
+#if !defined(MBEDTLS_SHA1_C)
+int mbedtls_pkcs5_self_test( int verbose )
+{
+ if( verbose != 0 )
+ mbedtls_printf( " PBKDF2 (SHA1): skipped\n\n" );
+
+ return( 0 );
+}
+#else
+
+#define MAX_TESTS 6
+
+static const size_t plen[MAX_TESTS] =
+ { 8, 8, 8, 24, 9 };
+
+static const unsigned char password[MAX_TESTS][32] =
+{
+ "password",
+ "password",
+ "password",
+ "passwordPASSWORDpassword",
+ "pass\0word",
+};
+
+static const size_t slen[MAX_TESTS] =
+ { 4, 4, 4, 36, 5 };
+
+static const unsigned char salt[MAX_TESTS][40] =
+{
+ "salt",
+ "salt",
+ "salt",
+ "saltSALTsaltSALTsaltSALTsaltSALTsalt",
+ "sa\0lt",
+};
+
+static const uint32_t it_cnt[MAX_TESTS] =
+ { 1, 2, 4096, 4096, 4096 };
+
+static const uint32_t key_len[MAX_TESTS] =
+ { 20, 20, 20, 25, 16 };
+
+static const unsigned char result_key[MAX_TESTS][32] =
+{
+ { 0x0c, 0x60, 0xc8, 0x0f, 0x96, 0x1f, 0x0e, 0x71,
+ 0xf3, 0xa9, 0xb5, 0x24, 0xaf, 0x60, 0x12, 0x06,
+ 0x2f, 0xe0, 0x37, 0xa6 },
+ { 0xea, 0x6c, 0x01, 0x4d, 0xc7, 0x2d, 0x6f, 0x8c,
+ 0xcd, 0x1e, 0xd9, 0x2a, 0xce, 0x1d, 0x41, 0xf0,
+ 0xd8, 0xde, 0x89, 0x57 },
+ { 0x4b, 0x00, 0x79, 0x01, 0xb7, 0x65, 0x48, 0x9a,
+ 0xbe, 0xad, 0x49, 0xd9, 0x26, 0xf7, 0x21, 0xd0,
+ 0x65, 0xa4, 0x29, 0xc1 },
+ { 0x3d, 0x2e, 0xec, 0x4f, 0xe4, 0x1c, 0x84, 0x9b,
+ 0x80, 0xc8, 0xd8, 0x36, 0x62, 0xc0, 0xe4, 0x4a,
+ 0x8b, 0x29, 0x1a, 0x96, 0x4c, 0xf2, 0xf0, 0x70,
+ 0x38 },
+ { 0x56, 0xfa, 0x6a, 0xa7, 0x55, 0x48, 0x09, 0x9d,
+ 0xcc, 0x37, 0xd7, 0xf0, 0x34, 0x25, 0xe0, 0xc3 },
+};
+
+int mbedtls_pkcs5_self_test( int verbose )
+{
+ mbedtls_md_context_t sha1_ctx;
+ const mbedtls_md_info_t *info_sha1;
+ int ret, i;
+ unsigned char key[64];
+
+ mbedtls_md_init( &sha1_ctx );
+
+ info_sha1 = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
+ if( info_sha1 == NULL )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ if( ( ret = mbedtls_md_setup( &sha1_ctx, info_sha1, 1 ) ) != 0 )
+ {
+ ret = 1;
+ goto exit;
+ }
+
+ for( i = 0; i < MAX_TESTS; i++ )
+ {
+ if( verbose != 0 )
+ mbedtls_printf( " PBKDF2 (SHA1) #%d: ", i );
+
+ ret = mbedtls_pkcs5_pbkdf2_hmac( &sha1_ctx, password[i], plen[i], salt[i],
+ slen[i], it_cnt[i], key_len[i], key );
+ if( ret != 0 ||
+ memcmp( result_key[i], key, key_len[i] ) != 0 )
+ {
+ if( verbose != 0 )
+ mbedtls_printf( "failed\n" );
+
+ ret = 1;
+ goto exit;
+ }
+
+ if( verbose != 0 )
+ mbedtls_printf( "passed\n" );
+ }
+
+ mbedtls_printf( "\n" );
+
+exit:
+ mbedtls_md_free( &sha1_ctx );
+
+ return( ret );
+}
+#endif /* MBEDTLS_SHA1_C */
+
+#endif /* MBEDTLS_SELF_TEST */
+
+#endif /* MBEDTLS_PKCS5_C */