--- /dev/null
+/*
+ * PKCS#12 Personal Information Exchange Syntax
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * 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
+
+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 );
+}
+
+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 */
projects / proxmark3-svn / blobdiff