mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-23 23:45:41 +01:00
1fd4321ba2
The error code POLARSSL_ERR_X509_PASSWORD_MISMATCH is now properly returned in case of an encryption failure in the padding. The POLARSSL_ERR_X509_PASSWORD_REQUIRED error code is only returned for PEM formatted private keys as for DER formatted ones it is impossible to distinguish if a DER blob is PKCS#8 encrypted or not.
416 lines
11 KiB
C
416 lines
11 KiB
C
/**
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* \file pkcs5.c
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*
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* \brief PKCS#5 functions
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*
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* \author Mathias Olsson <mathias@kompetensum.com>
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* PKCS#5 includes PBKDF2 and more
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*
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* http://tools.ietf.org/html/rfc2898 (Specification)
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* http://tools.ietf.org/html/rfc6070 (Test vectors)
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*/
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#include "polarssl/config.h"
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#if defined(POLARSSL_PKCS5_C)
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#include "polarssl/pkcs5.h"
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#include "polarssl/asn1.h"
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#include "polarssl/cipher.h"
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#define OID_CMP(oid_str, oid_buf) \
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( ( OID_SIZE(oid_str) == (oid_buf)->len ) && \
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memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) == 0)
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static int pkcs5_parse_pbkdf2_params( unsigned char **p,
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const unsigned char *end,
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asn1_buf *salt, int *iterations,
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int *keylen, md_type_t *md_type )
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{
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int ret;
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size_t len = 0;
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asn1_buf prf_alg_oid;
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/*
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* PBKDF2-params ::= SEQUENCE {
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* salt OCTET STRING,
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* iterationCount INTEGER,
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* keyLength INTEGER OPTIONAL
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* prf AlgorithmIdentifier DEFAULT algid-hmacWithSHA1
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* }
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*
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*/
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if( ( ret = asn1_get_tag( p, end, &len,
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ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
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{
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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}
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end = *p + len;
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if( ( ret = asn1_get_tag( p, end, &salt->len, ASN1_OCTET_STRING ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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salt->p = *p;
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*p += salt->len;
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if( ( ret = asn1_get_int( p, end, iterations ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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if( *p == end )
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return( 0 );
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if( ( ret = asn1_get_int( p, end, keylen ) ) != 0 )
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{
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if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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}
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if( *p == end )
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return( 0 );
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if( ( ret = asn1_get_tag( p, end, &prf_alg_oid.len, ASN1_OID ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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if( !OID_CMP( OID_HMAC_SHA1, &prf_alg_oid ) )
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return( POLARSSL_ERR_PKCS5_FEATURE_UNAVAILABLE );
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*md_type = POLARSSL_MD_SHA1;
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if( *p != end )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT +
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POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
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return( 0 );
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}
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int pkcs5_pbes2( asn1_buf *pbe_params, int mode,
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const unsigned char *pwd, size_t pwdlen,
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const unsigned char *data, size_t datalen,
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unsigned char *output )
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{
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int ret, iterations = 0, keylen = 0;
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unsigned char *p, *end, *end2;
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asn1_buf kdf_alg_oid, enc_scheme_oid, salt;
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md_type_t md_type = POLARSSL_MD_SHA1;
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unsigned char key[32], iv[32];
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size_t len = 0, olen = 0;
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const md_info_t *md_info;
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const cipher_info_t *cipher_info;
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md_context_t md_ctx;
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cipher_context_t cipher_ctx;
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p = pbe_params->p;
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end = p + pbe_params->len;
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/*
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* PBES2-params ::= SEQUENCE {
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* keyDerivationFunc AlgorithmIdentifier {{PBES2-KDFs}},
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* encryptionScheme AlgorithmIdentifier {{PBES2-Encs}}
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* }
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*/
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if( ( ret = asn1_get_tag( &p, end, &len,
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ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
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{
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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}
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if( ( ret = asn1_get_tag( &p, end, &len,
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ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
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{
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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}
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end2 = p + len;
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if( ( ret = asn1_get_tag( &p, end2, &kdf_alg_oid.len, ASN1_OID ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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kdf_alg_oid.p = p;
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p += kdf_alg_oid.len;
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// Only PBKDF2 supported at the moment
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//
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if( !OID_CMP( OID_PKCS5_PBKDF2, &kdf_alg_oid ) )
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return( POLARSSL_ERR_PKCS5_FEATURE_UNAVAILABLE );
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if( ( ret = pkcs5_parse_pbkdf2_params( &p, end2,
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&salt, &iterations, &keylen,
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&md_type ) ) != 0 )
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{
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return( ret );
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}
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md_info = md_info_from_type( md_type );
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if( md_info == NULL )
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return( POLARSSL_ERR_PKCS5_FEATURE_UNAVAILABLE );
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if( ( ret = asn1_get_tag( &p, end, &len,
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ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
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{
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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}
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end2 = p + len;
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if( ( ret = asn1_get_tag( &p, end2, &enc_scheme_oid.len, ASN1_OID ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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enc_scheme_oid.p = p;
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p += enc_scheme_oid.len;
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#if defined(POLARSSL_DES_C)
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// Only DES-CBC and DES-EDE3-CBC supported at the moment
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//
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if( OID_CMP( OID_DES_EDE3_CBC, &enc_scheme_oid ) )
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{
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cipher_info = cipher_info_from_type( POLARSSL_CIPHER_DES_EDE3_CBC );
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}
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else if( OID_CMP( OID_DES_CBC, &enc_scheme_oid ) )
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{
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cipher_info = cipher_info_from_type( POLARSSL_CIPHER_DES_CBC );
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}
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else
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#endif /* POLARSSL_DES_C */
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return( POLARSSL_ERR_PKCS5_FEATURE_UNAVAILABLE );
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if( cipher_info == NULL )
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return( POLARSSL_ERR_PKCS5_FEATURE_UNAVAILABLE );
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keylen = cipher_info->key_length / 8;
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if( ( ret = asn1_get_tag( &p, end2, &len, ASN1_OCTET_STRING ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT + ret );
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if( len != cipher_info->iv_size )
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return( POLARSSL_ERR_PKCS5_INVALID_FORMAT );
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memcpy( iv, p, len );
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if( ( ret = md_init_ctx( &md_ctx, md_info ) ) != 0 )
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return( ret );
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if( ( ret = cipher_init_ctx( &cipher_ctx, cipher_info ) ) != 0 )
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return( ret );
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if ( ( ret = pkcs5_pbkdf2_hmac( &md_ctx, pwd, pwdlen, salt.p, salt.len,
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iterations, keylen, key ) ) != 0 )
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{
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return( ret );
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}
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if( ( ret = cipher_setkey( &cipher_ctx, key, keylen, mode ) ) != 0 )
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return( ret );
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if( ( ret = cipher_reset( &cipher_ctx, iv ) ) != 0 )
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return( ret );
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if( ( ret = cipher_update( &cipher_ctx, data, datalen,
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output, &olen ) ) != 0 )
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{
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return( ret );
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}
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if( ( ret = cipher_finish( &cipher_ctx, output + olen, &olen ) ) != 0 )
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return( POLARSSL_ERR_PKCS5_PASSWORD_MISMATCH );
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return( 0 );
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}
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int pkcs5_pbkdf2_hmac( md_context_t *ctx, const unsigned char *password,
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size_t plen, const unsigned char *salt, size_t slen,
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unsigned int iteration_count,
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uint32_t key_length, unsigned char *output )
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{
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int ret, j;
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unsigned int i;
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unsigned char md1[POLARSSL_MD_MAX_SIZE];
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unsigned char work[POLARSSL_MD_MAX_SIZE];
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unsigned char md_size = md_get_size( ctx->md_info );
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size_t use_len;
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unsigned char *out_p = output;
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unsigned char counter[4];
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memset( counter, 0, 4 );
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counter[3] = 1;
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if( iteration_count > 0xFFFFFFFF )
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return( POLARSSL_ERR_PKCS5_BAD_INPUT_DATA );
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while( key_length )
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{
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// U1 ends up in work
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//
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if( ( ret = md_hmac_starts( ctx, password, plen ) ) != 0 )
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return( ret );
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if( ( ret = md_hmac_update( ctx, salt, slen ) ) != 0 )
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return( ret );
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if( ( ret = md_hmac_update( ctx, counter, 4 ) ) != 0 )
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return( ret );
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if( ( ret = md_hmac_finish( ctx, work ) ) != 0 )
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return( ret );
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memcpy( md1, work, md_size );
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for ( i = 1; i < iteration_count; i++ )
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{
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// U2 ends up in md1
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//
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if( ( ret = md_hmac_starts( ctx, password, plen ) ) != 0 )
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return( ret );
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if( ( ret = md_hmac_update( ctx, md1, md_size ) ) != 0 )
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return( ret );
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if( ( ret = md_hmac_finish( ctx, md1 ) ) != 0 )
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return( ret );
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// U1 xor U2
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//
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for( j = 0; j < md_size; j++ )
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work[j] ^= md1[j];
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}
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use_len = ( key_length < md_size ) ? key_length : md_size;
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memcpy( out_p, work, use_len );
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key_length -= use_len;
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out_p += use_len;
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for( i = 4; i > 0; i-- )
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if( ++counter[i - 1] != 0 )
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break;
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}
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return( 0 );
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}
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#if defined(POLARSSL_SELF_TEST)
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#include <stdio.h>
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#define MAX_TESTS 6
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size_t plen[MAX_TESTS] =
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{ 8, 8, 8, 8, 24, 9 };
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unsigned char password[MAX_TESTS][32] =
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{
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"password",
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"password",
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"password",
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"password",
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"passwordPASSWORDpassword",
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"pass\0word",
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};
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size_t slen[MAX_TESTS] =
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{ 4, 4, 4, 4, 36, 5 };
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unsigned char salt[MAX_TESTS][40] =
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{
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"salt",
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"salt",
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"salt",
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"salt",
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"saltSALTsaltSALTsaltSALTsaltSALTsalt",
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"sa\0lt",
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};
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uint32_t it_cnt[MAX_TESTS] =
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{ 1, 2, 4096, 16777216, 4096, 4096 };
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uint32_t key_len[MAX_TESTS] =
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{ 20, 20, 20, 20, 25, 16 };
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unsigned char result_key[MAX_TESTS][32] =
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{
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{ 0x0c, 0x60, 0xc8, 0x0f, 0x96, 0x1f, 0x0e, 0x71,
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0xf3, 0xa9, 0xb5, 0x24, 0xaf, 0x60, 0x12, 0x06,
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0x2f, 0xe0, 0x37, 0xa6 },
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{ 0xea, 0x6c, 0x01, 0x4d, 0xc7, 0x2d, 0x6f, 0x8c,
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0xcd, 0x1e, 0xd9, 0x2a, 0xce, 0x1d, 0x41, 0xf0,
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0xd8, 0xde, 0x89, 0x57 },
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{ 0x4b, 0x00, 0x79, 0x01, 0xb7, 0x65, 0x48, 0x9a,
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0xbe, 0xad, 0x49, 0xd9, 0x26, 0xf7, 0x21, 0xd0,
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0x65, 0xa4, 0x29, 0xc1 },
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{ 0xee, 0xfe, 0x3d, 0x61, 0xcd, 0x4d, 0xa4, 0xe4,
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0xe9, 0x94, 0x5b, 0x3d, 0x6b, 0xa2, 0x15, 0x8c,
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0x26, 0x34, 0xe9, 0x84 },
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{ 0x3d, 0x2e, 0xec, 0x4f, 0xe4, 0x1c, 0x84, 0x9b,
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0x80, 0xc8, 0xd8, 0x36, 0x62, 0xc0, 0xe4, 0x4a,
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0x8b, 0x29, 0x1a, 0x96, 0x4c, 0xf2, 0xf0, 0x70,
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0x38 },
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{ 0x56, 0xfa, 0x6a, 0xa7, 0x55, 0x48, 0x09, 0x9d,
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0xcc, 0x37, 0xd7, 0xf0, 0x34, 0x25, 0xe0, 0xc3 },
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};
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int pkcs5_self_test( int verbose )
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{
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md_context_t sha1_ctx;
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const md_info_t *info_sha1;
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int ret, i;
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unsigned char key[64];
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info_sha1 = md_info_from_type( POLARSSL_MD_SHA1 );
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if( info_sha1 == NULL )
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return( 1 );
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if( ( ret = md_init_ctx( &sha1_ctx, info_sha1 ) ) != 0 )
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return( 1 );
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for( i = 0; i < MAX_TESTS; i++ )
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{
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printf( " PBKDF2 (SHA1) #%d: ", i );
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ret = pkcs5_pbkdf2_hmac( &sha1_ctx, password[i], plen[i], salt[i],
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slen[i], it_cnt[i], key_len[i], key );
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if( ret != 0 ||
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memcmp( result_key[i], key, key_len[i] ) != 0 )
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{
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if( verbose != 0 )
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printf( "failed\n" );
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return( 1 );
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}
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if( verbose != 0 )
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printf( "passed\n" );
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}
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printf( "\n" );
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return( 0 );
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}
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#endif /* POLARSSL_SELF_TEST */
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#endif /* POLARSSL_PKCS5_C */
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