/* | |
* PKCS#12 Personal Information Exchange Syntax | |
* | |
* 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) | |
*/ | |
/* | |
* The PKCS #12 Personal Information Exchange Syntax Standard v1.1 | |
* | |
* http://www.rsa.com/rsalabs/pkcs/files/h11301-wp-pkcs-12v1-1-personal-information-exchange-syntax.pdf | |
* ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1-1.asn | |
*/ | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#if defined(MBEDTLS_PKCS12_C) | |
#include "mbedtls/pkcs12.h" | |
#include "mbedtls/asn1.h" | |
#include "mbedtls/cipher.h" | |
#include "mbedtls/platform_util.h" | |
#include <string.h> | |
#if defined(MBEDTLS_ARC4_C) | |
#include "mbedtls/arc4.h" | |
#endif | |
#if defined(MBEDTLS_DES_C) | |
#include "mbedtls/des.h" | |
#endif | |
#if defined(MBEDTLS_ASN1_PARSE_C) | |
static int pkcs12_parse_pbe_params( mbedtls_asn1_buf *params, | |
mbedtls_asn1_buf *salt, int *iterations ) | |
{ | |
int ret; | |
unsigned char **p = ¶ms->p; | |
const unsigned char *end = params->p + params->len; | |
/* | |
* pkcs-12PbeParams ::= SEQUENCE { | |
* salt OCTET STRING, | |
* iterations INTEGER | |
* } | |
* | |
*/ | |
if( params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) | |
return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + | |
MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ); | |
if( ( ret = mbedtls_asn1_get_tag( p, end, &salt->len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ) | |
return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + ret ); | |
salt->p = *p; | |
*p += salt->len; | |
if( ( ret = mbedtls_asn1_get_int( p, end, iterations ) ) != 0 ) | |
return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + ret ); | |
if( *p != end ) | |
return( MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
return( 0 ); | |
} | |
#define PKCS12_MAX_PWDLEN 128 | |
static int pkcs12_pbe_derive_key_iv( mbedtls_asn1_buf *pbe_params, mbedtls_md_type_t md_type, | |
const unsigned char *pwd, size_t pwdlen, | |
unsigned char *key, size_t keylen, | |
unsigned char *iv, size_t ivlen ) | |
{ | |
int ret, iterations = 0; | |
mbedtls_asn1_buf salt; | |
size_t i; | |
unsigned char unipwd[PKCS12_MAX_PWDLEN * 2 + 2]; | |
if( pwdlen > PKCS12_MAX_PWDLEN ) | |
return( MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA ); | |
memset( &salt, 0, sizeof(mbedtls_asn1_buf) ); | |
memset( &unipwd, 0, sizeof(unipwd) ); | |
if( ( ret = pkcs12_parse_pbe_params( pbe_params, &salt, | |
&iterations ) ) != 0 ) | |
return( ret ); | |
for( i = 0; i < pwdlen; i++ ) | |
unipwd[i * 2 + 1] = pwd[i]; | |
if( ( ret = mbedtls_pkcs12_derivation( key, keylen, unipwd, pwdlen * 2 + 2, | |
salt.p, salt.len, md_type, | |
MBEDTLS_PKCS12_DERIVE_KEY, iterations ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
if( iv == NULL || ivlen == 0 ) | |
return( 0 ); | |
if( ( ret = mbedtls_pkcs12_derivation( iv, ivlen, unipwd, pwdlen * 2 + 2, | |
salt.p, salt.len, md_type, | |
MBEDTLS_PKCS12_DERIVE_IV, iterations ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
return( 0 ); | |
} | |
#undef PKCS12_MAX_PWDLEN | |
int mbedtls_pkcs12_pbe_sha1_rc4_128( mbedtls_asn1_buf *pbe_params, int mode, | |
const unsigned char *pwd, size_t pwdlen, | |
const unsigned char *data, size_t len, | |
unsigned char *output ) | |
{ | |
#if !defined(MBEDTLS_ARC4_C) | |
((void) pbe_params); | |
((void) mode); | |
((void) pwd); | |
((void) pwdlen); | |
((void) data); | |
((void) len); | |
((void) output); | |
return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE ); | |
#else | |
int ret; | |
unsigned char key[16]; | |
mbedtls_arc4_context ctx; | |
((void) mode); | |
mbedtls_arc4_init( &ctx ); | |
if( ( ret = pkcs12_pbe_derive_key_iv( pbe_params, MBEDTLS_MD_SHA1, | |
pwd, pwdlen, | |
key, 16, NULL, 0 ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
mbedtls_arc4_setup( &ctx, key, 16 ); | |
if( ( ret = mbedtls_arc4_crypt( &ctx, len, data, output ) ) != 0 ) | |
goto exit; | |
exit: | |
mbedtls_platform_zeroize( key, sizeof( key ) ); | |
mbedtls_arc4_free( &ctx ); | |
return( ret ); | |
#endif /* MBEDTLS_ARC4_C */ | |
} | |
int mbedtls_pkcs12_pbe( mbedtls_asn1_buf *pbe_params, int mode, | |
mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type, | |
const unsigned char *pwd, size_t pwdlen, | |
const unsigned char *data, size_t len, | |
unsigned char *output ) | |
{ | |
int ret, keylen = 0; | |
unsigned char key[32]; | |
unsigned char iv[16]; | |
const mbedtls_cipher_info_t *cipher_info; | |
mbedtls_cipher_context_t cipher_ctx; | |
size_t olen = 0; | |
cipher_info = mbedtls_cipher_info_from_type( cipher_type ); | |
if( cipher_info == NULL ) | |
return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE ); | |
keylen = cipher_info->key_bitlen / 8; | |
if( ( ret = pkcs12_pbe_derive_key_iv( pbe_params, md_type, pwd, pwdlen, | |
key, keylen, | |
iv, cipher_info->iv_size ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
mbedtls_cipher_init( &cipher_ctx ); | |
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_set_iv( &cipher_ctx, iv, cipher_info->iv_size ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_cipher_reset( &cipher_ctx ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_cipher_update( &cipher_ctx, data, len, | |
output, &olen ) ) != 0 ) | |
{ | |
goto exit; | |
} | |
if( ( ret = mbedtls_cipher_finish( &cipher_ctx, output + olen, &olen ) ) != 0 ) | |
ret = MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH; | |
exit: | |
mbedtls_platform_zeroize( key, sizeof( key ) ); | |
mbedtls_platform_zeroize( iv, sizeof( iv ) ); | |
mbedtls_cipher_free( &cipher_ctx ); | |
return( ret ); | |
} | |
#endif /* MBEDTLS_ASN1_PARSE_C */ | |
static void pkcs12_fill_buffer( unsigned char *data, size_t data_len, | |
const unsigned char *filler, size_t fill_len ) | |
{ | |
unsigned char *p = data; | |
size_t use_len; | |
while( data_len > 0 ) | |
{ | |
use_len = ( data_len > fill_len ) ? fill_len : data_len; | |
memcpy( p, filler, use_len ); | |
p += use_len; | |
data_len -= use_len; | |
} | |
} | |
int mbedtls_pkcs12_derivation( unsigned char *data, size_t datalen, | |
const unsigned char *pwd, size_t pwdlen, | |
const unsigned char *salt, size_t saltlen, | |
mbedtls_md_type_t md_type, int id, int iterations ) | |
{ | |
int ret; | |
unsigned int j; | |
unsigned char diversifier[128]; | |
unsigned char salt_block[128], pwd_block[128], hash_block[128]; | |
unsigned char hash_output[MBEDTLS_MD_MAX_SIZE]; | |
unsigned char *p; | |
unsigned char c; | |
size_t hlen, use_len, v, i; | |
const mbedtls_md_info_t *md_info; | |
mbedtls_md_context_t md_ctx; | |
// This version only allows max of 64 bytes of password or salt | |
if( datalen > 128 || pwdlen > 64 || saltlen > 64 ) | |
return( MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA ); | |
md_info = mbedtls_md_info_from_type( md_type ); | |
if( md_info == NULL ) | |
return( MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE ); | |
mbedtls_md_init( &md_ctx ); | |
if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 ) | |
return( ret ); | |
hlen = mbedtls_md_get_size( md_info ); | |
if( hlen <= 32 ) | |
v = 64; | |
else | |
v = 128; | |
memset( diversifier, (unsigned char) id, v ); | |
pkcs12_fill_buffer( salt_block, v, salt, saltlen ); | |
pkcs12_fill_buffer( pwd_block, v, pwd, pwdlen ); | |
p = data; | |
while( datalen > 0 ) | |
{ | |
// Calculate hash( diversifier || salt_block || pwd_block ) | |
if( ( ret = mbedtls_md_starts( &md_ctx ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_md_update( &md_ctx, diversifier, v ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_md_update( &md_ctx, salt_block, v ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_md_update( &md_ctx, pwd_block, v ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_md_finish( &md_ctx, hash_output ) ) != 0 ) | |
goto exit; | |
// Perform remaining ( iterations - 1 ) recursive hash calculations | |
for( i = 1; i < (size_t) iterations; i++ ) | |
{ | |
if( ( ret = mbedtls_md( md_info, hash_output, hlen, hash_output ) ) != 0 ) | |
goto exit; | |
} | |
use_len = ( datalen > hlen ) ? hlen : datalen; | |
memcpy( p, hash_output, use_len ); | |
datalen -= use_len; | |
p += use_len; | |
if( datalen == 0 ) | |
break; | |
// Concatenating copies of hash_output into hash_block (B) | |
pkcs12_fill_buffer( hash_block, v, hash_output, hlen ); | |
// B += 1 | |
for( i = v; i > 0; i-- ) | |
if( ++hash_block[i - 1] != 0 ) | |
break; | |
// salt_block += B | |
c = 0; | |
for( i = v; i > 0; i-- ) | |
{ | |
j = salt_block[i - 1] + hash_block[i - 1] + c; | |
c = (unsigned char) (j >> 8); | |
salt_block[i - 1] = j & 0xFF; | |
} | |
// pwd_block += B | |
c = 0; | |
for( i = v; i > 0; i-- ) | |
{ | |
j = pwd_block[i - 1] + hash_block[i - 1] + c; | |
c = (unsigned char) (j >> 8); | |
pwd_block[i - 1] = j & 0xFF; | |
} | |
} | |
ret = 0; | |
exit: | |
mbedtls_platform_zeroize( salt_block, sizeof( salt_block ) ); | |
mbedtls_platform_zeroize( pwd_block, sizeof( pwd_block ) ); | |
mbedtls_platform_zeroize( hash_block, sizeof( hash_block ) ); | |
mbedtls_platform_zeroize( hash_output, sizeof( hash_output ) ); | |
mbedtls_md_free( &md_ctx ); | |
return( ret ); | |
} | |
#endif /* MBEDTLS_PKCS12_C */ |