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Git-Center/Crypt/DES.php

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Ajout de la lib SSH
2013-10-02 12:28:09 +00:00
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Pure-PHP implementation of DES.
*
* Uses mcrypt, if available, and an internal implementation, otherwise.
*
* PHP versions 4 and 5
*
* Useful resources are as follows:
*
* - {@link http://en.wikipedia.org/wiki/DES_supplementary_material Wikipedia: DES supplementary material}
* - {@link http://www.itl.nist.gov/fipspubs/fip46-2.htm FIPS 46-2 - (DES), Data Encryption Standard}
* - {@link http://www.cs.eku.edu/faculty/styer/460/Encrypt/JS-DES.html JavaScript DES Example}
*
* Here's a short example of how to use this library:
* <code>
* <?php
* include('Crypt/DES.php');
*
* $des = new Crypt_DES();
*
* $des->setKey('abcdefgh');
*
* $size = 10 * 1024;
* $plaintext = '';
* for ($i = 0; $i < $size; $i++) {
* $plaintext.= 'a';
* }
*
* echo $des->decrypt($des->encrypt($plaintext));
* ?>
* </code>
*
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @category Crypt
* @package Crypt_DES
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
/**#@+
* @access private
* @see Crypt_DES::_prepareKey()
* @see Crypt_DES::_processBlock()
*/
/**
* Contains array_reverse($keys[CRYPT_DES_DECRYPT])
*/
define('CRYPT_DES_ENCRYPT', 0);
/**
* Contains array_reverse($keys[CRYPT_DES_ENCRYPT])
*/
define('CRYPT_DES_DECRYPT', 1);
/**
* Contains $keys[CRYPT_DES_ENCRYPT] as 1-dim array
*/
define('CRYPT_DES_ENCRYPT_1DIM', 2);
/**
* Contains $keys[CRYPT_DES_DECRYPT] as 1-dim array
*/
define('CRYPT_DES_DECRYPT_1DIM', 3);
/**#@-*/
/**#@+
* @access public
* @see Crypt_DES::encrypt()
* @see Crypt_DES::decrypt()
*/
/**
* Encrypt / decrypt using the Counter mode.
*
* Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.
*
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
*/
define('CRYPT_DES_MODE_CTR', -1);
/**
* Encrypt / decrypt using the Electronic Code Book mode.
*
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29
*/
define('CRYPT_DES_MODE_ECB', 1);
/**
* Encrypt / decrypt using the Code Book Chaining mode.
*
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29
*/
define('CRYPT_DES_MODE_CBC', 2);
/**
* Encrypt / decrypt using the Cipher Feedback mode.
*
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29
*/
define('CRYPT_DES_MODE_CFB', 3);
/**
* Encrypt / decrypt using the Cipher Feedback mode.
*
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29
*/
define('CRYPT_DES_MODE_OFB', 4);
/**#@-*/
/**#@+
* @access private
* @see Crypt_DES::Crypt_DES()
*/
/**
* Toggles the internal implementation
*/
define('CRYPT_DES_MODE_INTERNAL', 1);
/**
* Toggles the mcrypt implementation
*/
define('CRYPT_DES_MODE_MCRYPT', 2);
/**#@-*/
/**
* Pure-PHP implementation of DES.
*
* @author Jim Wigginton <terrafrost@php.net>
* @version 0.1.0
* @access public
* @package Crypt_DES
*/
class Crypt_DES {
/**
* The Key Schedule
*
* @see Crypt_DES::setKey()
* @var Array
* @access private
*/
var $keys = "\0\0\0\0\0\0\0\0";
/**
* The Encryption Mode
*
* @see Crypt_DES::Crypt_DES()
* @var Integer
* @access private
*/
var $mode;
/**
* Continuous Buffer status
*
* @see Crypt_DES::enableContinuousBuffer()
* @var Boolean
* @access private
*/
var $continuousBuffer = false;
/**
* Padding status
*
* @see Crypt_DES::enablePadding()
* @var Boolean
* @access private
*/
var $padding = true;
/**
* The Initialization Vector
*
* @see Crypt_DES::setIV()
* @var String
* @access private
*/
var $iv = "\0\0\0\0\0\0\0\0";
/**
* A "sliding" Initialization Vector
*
* @see Crypt_DES::enableContinuousBuffer()
* @var String
* @access private
*/
var $encryptIV = "\0\0\0\0\0\0\0\0";
/**
* A "sliding" Initialization Vector
*
* @see Crypt_DES::enableContinuousBuffer()
* @var String
* @access private
*/
var $decryptIV = "\0\0\0\0\0\0\0\0";
/**
* mcrypt resource for encryption
*
* The mcrypt resource can be recreated every time something needs to be created or it can be created just once.
* Since mcrypt operates in continuous mode, by default, it'll need to be recreated when in non-continuous mode.
*
* @see Crypt_DES::encrypt()
* @var String
* @access private
*/
var $enmcrypt;
/**
* mcrypt resource for decryption
*
* The mcrypt resource can be recreated every time something needs to be created or it can be created just once.
* Since mcrypt operates in continuous mode, by default, it'll need to be recreated when in non-continuous mode.
*
* @see Crypt_DES::decrypt()
* @var String
* @access private
*/
var $demcrypt;
/**
* Does the enmcrypt resource need to be (re)initialized?
*
* @see Crypt_DES::setKey()
* @see Crypt_DES::setIV()
* @var Boolean
* @access private
*/
var $enchanged = true;
/**
* Does the demcrypt resource need to be (re)initialized?
*
* @see Crypt_DES::setKey()
* @see Crypt_DES::setIV()
* @var Boolean
* @access private
*/
var $dechanged = true;
/**
* Is the mode one that is paddable?
*
* @see Crypt_DES::Crypt_DES()
* @var Boolean
* @access private
*/
var $paddable = false;
/**
* Encryption buffer for CTR, OFB and CFB modes
*
* @see Crypt_DES::encrypt()
* @var Array
* @access private
*/
var $enbuffer = array('encrypted' => '', 'xor' => '', 'pos' => 0, 'enmcrypt_init' => true);
/**
* Decryption buffer for CTR, OFB and CFB modes
*
* @see Crypt_DES::decrypt()
* @var Array
* @access private
*/
var $debuffer = array('ciphertext' => '', 'xor' => '', 'pos' => 0, 'demcrypt_init' => true);
/**
* mcrypt resource for CFB mode
*
* @see Crypt_DES::encrypt()
* @see Crypt_DES::decrypt()
* @var String
* @access private
*/
var $ecb;
/**
* Performance-optimized callback function for en/decrypt()
*
* @var Callback
* @access private
*/
var $inline_crypt;
/**
* Holds whether performance-optimized $inline_crypt should be used or not.
*
* @var Boolean
* @access private
*/
var $use_inline_crypt = false;
/**
* Shuffle table.
*
* For each byte value index, the entry holds an 8-byte string
* with each byte containing all bits in the same state as the
* corresponding bit in the index value.
*
* @see Crypt_DES::_processBlock()
* @see Crypt_DES::_prepareKey()
* @var Array
* @access private
*/
var $shuffle = array(
"\x00\x00\x00\x00\x00\x00\x00\x00", "\x00\x00\x00\x00\x00\x00\x00\xFF",
"\x00\x00\x00\x00\x00\x00\xFF\x00", "\x00\x00\x00\x00\x00\x00\xFF\xFF",
"\x00\x00\x00\x00\x00\xFF\x00\x00", "\x00\x00\x00\x00\x00\xFF\x00\xFF",
"\x00\x00\x00\x00\x00\xFF\xFF\x00", "\x00\x00\x00\x00\x00\xFF\xFF\xFF",
"\x00\x00\x00\x00\xFF\x00\x00\x00", "\x00\x00\x00\x00\xFF\x00\x00\xFF",
"\x00\x00\x00\x00\xFF\x00\xFF\x00", "\x00\x00\x00\x00\xFF\x00\xFF\xFF",
"\x00\x00\x00\x00\xFF\xFF\x00\x00", "\x00\x00\x00\x00\xFF\xFF\x00\xFF",
"\x00\x00\x00\x00\xFF\xFF\xFF\x00", "\x00\x00\x00\x00\xFF\xFF\xFF\xFF",
"\x00\x00\x00\xFF\x00\x00\x00\x00", "\x00\x00\x00\xFF\x00\x00\x00\xFF",
"\x00\x00\x00\xFF\x00\x00\xFF\x00", "\x00\x00\x00\xFF\x00\x00\xFF\xFF",
"\x00\x00\x00\xFF\x00\xFF\x00\x00", "\x00\x00\x00\xFF\x00\xFF\x00\xFF",
"\x00\x00\x00\xFF\x00\xFF\xFF\x00", "\x00\x00\x00\xFF\x00\xFF\xFF\xFF",
"\x00\x00\x00\xFF\xFF\x00\x00\x00", "\x00\x00\x00\xFF\xFF\x00\x00\xFF",
"\x00\x00\x00\xFF\xFF\x00\xFF\x00", "\x00\x00\x00\xFF\xFF\x00\xFF\xFF",
"\x00\x00\x00\xFF\xFF\xFF\x00\x00", "\x00\x00\x00\xFF\xFF\xFF\x00\xFF",
"\x00\x00\x00\xFF\xFF\xFF\xFF\x00", "\x00\x00\x00\xFF\xFF\xFF\xFF\xFF",
"\x00\x00\xFF\x00\x00\x00\x00\x00", "\x00\x00\xFF\x00\x00\x00\x00\xFF",
"\x00\x00\xFF\x00\x00\x00\xFF\x00", "\x00\x00\xFF\x00\x00\x00\xFF\xFF",
"\x00\x00\xFF\x00\x00\xFF\x00\x00", "\x00\x00\xFF\x00\x00\xFF\x00\xFF",
"\x00\x00\xFF\x00\x00\xFF\xFF\x00", "\x00\x00\xFF\x00\x00\xFF\xFF\xFF",
"\x00\x00\xFF\x00\xFF\x00\x00\x00", "\x00\x00\xFF\x00\xFF\x00\x00\xFF",
"\x00\x00\xFF\x00\xFF\x00\xFF\x00", "\x00\x00\xFF\x00\xFF\x00\xFF\xFF",
"\x00\x00\xFF\x00\xFF\xFF\x00\x00", "\x00\x00\xFF\x00\xFF\xFF\x00\xFF",
"\x00\x00\xFF\x00\xFF\xFF\xFF\x00", "\x00\x00\xFF\x00\xFF\xFF\xFF\xFF",
"\x00\x00\xFF\xFF\x00\x00\x00\x00", "\x00\x00\xFF\xFF\x00\x00\x00\xFF",
"\x00\x00\xFF\xFF\x00\x00\xFF\x00", "\x00\x00\xFF\xFF\x00\x00\xFF\xFF",
"\x00\x00\xFF\xFF\x00\xFF\x00\x00", "\x00\x00\xFF\xFF\x00\xFF\x00\xFF",
"\x00\x00\xFF\xFF\x00\xFF\xFF\x00", "\x00\x00\xFF\xFF\x00\xFF\xFF\xFF",
"\x00\x00\xFF\xFF\xFF\x00\x00\x00", "\x00\x00\xFF\xFF\xFF\x00\x00\xFF",
"\x00\x00\xFF\xFF\xFF\x00\xFF\x00", "\x00\x00\xFF\xFF\xFF\x00\xFF\xFF",
"\x00\x00\xFF\xFF\xFF\xFF\x00\x00", "\x00\x00\xFF\xFF\xFF\xFF\x00\xFF",
"\x00\x00\xFF\xFF\xFF\xFF\xFF\x00", "\x00\x00\xFF\xFF\xFF\xFF\xFF\xFF",
"\x00\xFF\x00\x00\x00\x00\x00\x00", "\x00\xFF\x00\x00\x00\x00\x00\xFF",
"\x00\xFF\x00\x00\x00\x00\xFF\x00", "\x00\xFF\x00\x00\x00\x00\xFF\xFF",
"\x00\xFF\x00\x00\x00\xFF\x00\x00", "\x00\xFF\x00\x00\x00\xFF\x00\xFF",
"\x00\xFF\x00\x00\x00\xFF\xFF\x00", "\x00\xFF\x00\x00\x00\xFF\xFF\xFF",
"\x00\xFF\x00\x00\xFF\x00\x00\x00", "\x00\xFF\x00\x00\xFF\x00\x00\xFF",
"\x00\xFF\x00\x00\xFF\x00\xFF\x00", "\x00\xFF\x00\x00\xFF\x00\xFF\xFF",
"\x00\xFF\x00\x00\xFF\xFF\x00\x00", "\x00\xFF\x00\x00\xFF\xFF\x00\xFF",
"\x00\xFF\x00\x00\xFF\xFF\xFF\x00", "\x00\xFF\x00\x00\xFF\xFF\xFF\xFF",
"\x00\xFF\x00\xFF\x00\x00\x00\x00", "\x00\xFF\x00\xFF\x00\x00\x00\xFF",
"\x00\xFF\x00\xFF\x00\x00\xFF\x00", "\x00\xFF\x00\xFF\x00\x00\xFF\xFF",
"\x00\xFF\x00\xFF\x00\xFF\x00\x00", "\x00\xFF\x00\xFF\x00\xFF\x00\xFF",
"\x00\xFF\x00\xFF\x00\xFF\xFF\x00", "\x00\xFF\x00\xFF\x00\xFF\xFF\xFF",
"\x00\xFF\x00\xFF\xFF\x00\x00\x00", "\x00\xFF\x00\xFF\xFF\x00\x00\xFF",
"\x00\xFF\x00\xFF\xFF\x00\xFF\x00", "\x00\xFF\x00\xFF\xFF\x00\xFF\xFF",
"\x00\xFF\x00\xFF\xFF\xFF\x00\x00", "\x00\xFF\x00\xFF\xFF\xFF\x00\xFF",
"\x00\xFF\x00\xFF\xFF\xFF\xFF\x00", "\x00\xFF\x00\xFF\xFF\xFF\xFF\xFF",
"\x00\xFF\xFF\x00\x00\x00\x00\x00", "\x00\xFF\xFF\x00\x00\x00\x00\xFF",
"\x00\xFF\xFF\x00\x00\x00\xFF\x00", "\x00\xFF\xFF\x00\x00\x00\xFF\xFF",
"\x00\xFF\xFF\x00\x00\xFF\x00\x00", "\x00\xFF\xFF\x00\x00\xFF\x00\xFF",
"\x00\xFF\xFF\x00\x00\xFF\xFF\x00", "\x00\xFF\xFF\x00\x00\xFF\xFF\xFF",
"\x00\xFF\xFF\x00\xFF\x00\x00\x00", "\x00\xFF\xFF\x00\xFF\x00\x00\xFF",
"\x00\xFF\xFF\x00\xFF\x00\xFF\x00", "\x00\xFF\xFF\x00\xFF\x00\xFF\xFF",
"\x00\xFF\xFF\x00\xFF\xFF\x00\x00", "\x00\xFF\xFF\x00\xFF\xFF\x00\xFF",
"\x00\xFF\xFF\x00\xFF\xFF\xFF\x00", "\x00\xFF\xFF\x00\xFF\xFF\xFF\xFF",
"\x00\xFF\xFF\xFF\x00\x00\x00\x00", "\x00\xFF\xFF\xFF\x00\x00\x00\xFF",
"\x00\xFF\xFF\xFF\x00\x00\xFF\x00", "\x00\xFF\xFF\xFF\x00\x00\xFF\xFF",
"\x00\xFF\xFF\xFF\x00\xFF\x00\x00", "\x00\xFF\xFF\xFF\x00\xFF\x00\xFF",
"\x00\xFF\xFF\xFF\x00\xFF\xFF\x00", "\x00\xFF\xFF\xFF\x00\xFF\xFF\xFF",
"\x00\xFF\xFF\xFF\xFF\x00\x00\x00", "\x00\xFF\xFF\xFF\xFF\x00\x00\xFF",
"\x00\xFF\xFF\xFF\xFF\x00\xFF\x00", "\x00\xFF\xFF\xFF\xFF\x00\xFF\xFF",
"\x00\xFF\xFF\xFF\xFF\xFF\x00\x00", "\x00\xFF\xFF\xFF\xFF\xFF\x00\xFF",
"\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00", "\x00\xFF\xFF\xFF\xFF\xFF\xFF\xFF",
"\xFF\x00\x00\x00\x00\x00\x00\x00", "\xFF\x00\x00\x00\x00\x00\x00\xFF",
"\xFF\x00\x00\x00\x00\x00\xFF\x00", "\xFF\x00\x00\x00\x00\x00\xFF\xFF",
"\xFF\x00\x00\x00\x00\xFF\x00\x00", "\xFF\x00\x00\x00\x00\xFF\x00\xFF",
"\xFF\x00\x00\x00\x00\xFF\xFF\x00", "\xFF\x00\x00\x00\x00\xFF\xFF\xFF",
"\xFF\x00\x00\x00\xFF\x00\x00\x00", "\xFF\x00\x00\x00\xFF\x00\x00\xFF",
"\xFF\x00\x00\x00\xFF\x00\xFF\x00", "\xFF\x00\x00\x00\xFF\x00\xFF\xFF",
"\xFF\x00\x00\x00\xFF\xFF\x00\x00", "\xFF\x00\x00\x00\xFF\xFF\x00\xFF",
"\xFF\x00\x00\x00\xFF\xFF\xFF\x00", "\xFF\x00\x00\x00\xFF\xFF\xFF\xFF",
"\xFF\x00\x00\xFF\x00\x00\x00\x00", "\xFF\x00\x00\xFF\x00\x00\x00\xFF",
"\xFF\x00\x00\xFF\x00\x00\xFF\x00", "\xFF\x00\x00\xFF\x00\x00\xFF\xFF",
"\xFF\x00\x00\xFF\x00\xFF\x00\x00", "\xFF\x00\x00\xFF\x00\xFF\x00\xFF",
"\xFF\x00\x00\xFF\x00\xFF\xFF\x00", "\xFF\x00\x00\xFF\x00\xFF\xFF\xFF",
"\xFF\x00\x00\xFF\xFF\x00\x00\x00", "\xFF\x00\x00\xFF\xFF\x00\x00\xFF",
"\xFF\x00\x00\xFF\xFF\x00\xFF\x00", "\xFF\x00\x00\xFF\xFF\x00\xFF\xFF",
"\xFF\x00\x00\xFF\xFF\xFF\x00\x00", "\xFF\x00\x00\xFF\xFF\xFF\x00\xFF",
"\xFF\x00\x00\xFF\xFF\xFF\xFF\x00", "\xFF\x00\x00\xFF\xFF\xFF\xFF\xFF",
"\xFF\x00\xFF\x00\x00\x00\x00\x00", "\xFF\x00\xFF\x00\x00\x00\x00\xFF",
"\xFF\x00\xFF\x00\x00\x00\xFF\x00", "\xFF\x00\xFF\x00\x00\x00\xFF\xFF",
"\xFF\x00\xFF\x00\x00\xFF\x00\x00", "\xFF\x00\xFF\x00\x00\xFF\x00\xFF",
"\xFF\x00\xFF\x00\x00\xFF\xFF\x00", "\xFF\x00\xFF\x00\x00\xFF\xFF\xFF",
"\xFF\x00\xFF\x00\xFF\x00\x00\x00", "\xFF\x00\xFF\x00\xFF\x00\x00\xFF",
"\xFF\x00\xFF\x00\xFF\x00\xFF\x00", "\xFF\x00\xFF\x00\xFF\x00\xFF\xFF",
"\xFF\x00\xFF\x00\xFF\xFF\x00\x00", "\xFF\x00\xFF\x00\xFF\xFF\x00\xFF",
"\xFF\x00\xFF\x00\xFF\xFF\xFF\x00", "\xFF\x00\xFF\x00\xFF\xFF\xFF\xFF",
"\xFF\x00\xFF\xFF\x00\x00\x00\x00", "\xFF\x00\xFF\xFF\x00\x00\x00\xFF",
"\xFF\x00\xFF\xFF\x00\x00\xFF\x00", "\xFF\x00\xFF\xFF\x00\x00\xFF\xFF",
"\xFF\x00\xFF\xFF\x00\xFF\x00\x00", "\xFF\x00\xFF\xFF\x00\xFF\x00\xFF",
"\xFF\x00\xFF\xFF\x00\xFF\xFF\x00", "\xFF\x00\xFF\xFF\x00\xFF\xFF\xFF",
"\xFF\x00\xFF\xFF\xFF\x00\x00\x00", "\xFF\x00\xFF\xFF\xFF\x00\x00\xFF",
"\xFF\x00\xFF\xFF\xFF\x00\xFF\x00", "\xFF\x00\xFF\xFF\xFF\x00\xFF\xFF",
"\xFF\x00\xFF\xFF\xFF\xFF\x00\x00", "\xFF\x00\xFF\xFF\xFF\xFF\x00\xFF",
"\xFF\x00\xFF\xFF\xFF\xFF\xFF\x00", "\xFF\x00\xFF\xFF\xFF\xFF\xFF\xFF",
"\xFF\xFF\x00\x00\x00\x00\x00\x00", "\xFF\xFF\x00\x00\x00\x00\x00\xFF",
"\xFF\xFF\x00\x00\x00\x00\xFF\x00", "\xFF\xFF\x00\x00\x00\x00\xFF\xFF",
"\xFF\xFF\x00\x00\x00\xFF\x00\x00", "\xFF\xFF\x00\x00\x00\xFF\x00\xFF",
"\xFF\xFF\x00\x00\x00\xFF\xFF\x00", "\xFF\xFF\x00\x00\x00\xFF\xFF\xFF",
"\xFF\xFF\x00\x00\xFF\x00\x00\x00", "\xFF\xFF\x00\x00\xFF\x00\x00\xFF",
"\xFF\xFF\x00\x00\xFF\x00\xFF\x00", "\xFF\xFF\x00\x00\xFF\x00\xFF\xFF",
"\xFF\xFF\x00\x00\xFF\xFF\x00\x00", "\xFF\xFF\x00\x00\xFF\xFF\x00\xFF",
"\xFF\xFF\x00\x00\xFF\xFF\xFF\x00", "\xFF\xFF\x00\x00\xFF\xFF\xFF\xFF",
"\xFF\xFF\x00\xFF\x00\x00\x00\x00", "\xFF\xFF\x00\xFF\x00\x00\x00\xFF",
"\xFF\xFF\x00\xFF\x00\x00\xFF\x00", "\xFF\xFF\x00\xFF\x00\x00\xFF\xFF",
"\xFF\xFF\x00\xFF\x00\xFF\x00\x00", "\xFF\xFF\x00\xFF\x00\xFF\x00\xFF",
"\xFF\xFF\x00\xFF\x00\xFF\xFF\x00", "\xFF\xFF\x00\xFF\x00\xFF\xFF\xFF",
"\xFF\xFF\x00\xFF\xFF\x00\x00\x00", "\xFF\xFF\x00\xFF\xFF\x00\x00\xFF",
"\xFF\xFF\x00\xFF\xFF\x00\xFF\x00", "\xFF\xFF\x00\xFF\xFF\x00\xFF\xFF",
"\xFF\xFF\x00\xFF\xFF\xFF\x00\x00", "\xFF\xFF\x00\xFF\xFF\xFF\x00\xFF",
"\xFF\xFF\x00\xFF\xFF\xFF\xFF\x00", "\xFF\xFF\x00\xFF\xFF\xFF\xFF\xFF",
"\xFF\xFF\xFF\x00\x00\x00\x00\x00", "\xFF\xFF\xFF\x00\x00\x00\x00\xFF",
"\xFF\xFF\xFF\x00\x00\x00\xFF\x00", "\xFF\xFF\xFF\x00\x00\x00\xFF\xFF",
"\xFF\xFF\xFF\x00\x00\xFF\x00\x00", "\xFF\xFF\xFF\x00\x00\xFF\x00\xFF",
"\xFF\xFF\xFF\x00\x00\xFF\xFF\x00", "\xFF\xFF\xFF\x00\x00\xFF\xFF\xFF",
"\xFF\xFF\xFF\x00\xFF\x00\x00\x00", "\xFF\xFF\xFF\x00\xFF\x00\x00\xFF",
"\xFF\xFF\xFF\x00\xFF\x00\xFF\x00", "\xFF\xFF\xFF\x00\xFF\x00\xFF\xFF",
"\xFF\xFF\xFF\x00\xFF\xFF\x00\x00", "\xFF\xFF\xFF\x00\xFF\xFF\x00\xFF",
"\xFF\xFF\xFF\x00\xFF\xFF\xFF\x00", "\xFF\xFF\xFF\x00\xFF\xFF\xFF\xFF",
"\xFF\xFF\xFF\xFF\x00\x00\x00\x00", "\xFF\xFF\xFF\xFF\x00\x00\x00\xFF",
"\xFF\xFF\xFF\xFF\x00\x00\xFF\x00", "\xFF\xFF\xFF\xFF\x00\x00\xFF\xFF",
"\xFF\xFF\xFF\xFF\x00\xFF\x00\x00", "\xFF\xFF\xFF\xFF\x00\xFF\x00\xFF",
"\xFF\xFF\xFF\xFF\x00\xFF\xFF\x00", "\xFF\xFF\xFF\xFF\x00\xFF\xFF\xFF",
"\xFF\xFF\xFF\xFF\xFF\x00\x00\x00", "\xFF\xFF\xFF\xFF\xFF\x00\x00\xFF",
"\xFF\xFF\xFF\xFF\xFF\x00\xFF\x00", "\xFF\xFF\xFF\xFF\xFF\x00\xFF\xFF",
"\xFF\xFF\xFF\xFF\xFF\xFF\x00\x00", "\xFF\xFF\xFF\xFF\xFF\xFF\x00\xFF",
"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x00", "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"
);
/**
* IP mapping helper table.
*
* Indexing this table with each source byte performs the initial bit permutation.
*
* @var Array
* @access private
*/
var $ipmap = array(
0x00, 0x10, 0x01, 0x11, 0x20, 0x30, 0x21, 0x31,
0x02, 0x12, 0x03, 0x13, 0x22, 0x32, 0x23, 0x33,
0x40, 0x50, 0x41, 0x51, 0x60, 0x70, 0x61, 0x71,
0x42, 0x52, 0x43, 0x53, 0x62, 0x72, 0x63, 0x73,
0x04, 0x14, 0x05, 0x15, 0x24, 0x34, 0x25, 0x35,
0x06, 0x16, 0x07, 0x17, 0x26, 0x36, 0x27, 0x37,
0x44, 0x54, 0x45, 0x55, 0x64, 0x74, 0x65, 0x75,
0x46, 0x56, 0x47, 0x57, 0x66, 0x76, 0x67, 0x77,
0x80, 0x90, 0x81, 0x91, 0xA0, 0xB0, 0xA1, 0xB1,
0x82, 0x92, 0x83, 0x93, 0xA2, 0xB2, 0xA3, 0xB3,
0xC0, 0xD0, 0xC1, 0xD1, 0xE0, 0xF0, 0xE1, 0xF1,
0xC2, 0xD2, 0xC3, 0xD3, 0xE2, 0xF2, 0xE3, 0xF3,
0x84, 0x94, 0x85, 0x95, 0xA4, 0xB4, 0xA5, 0xB5,
0x86, 0x96, 0x87, 0x97, 0xA6, 0xB6, 0xA7, 0xB7,
0xC4, 0xD4, 0xC5, 0xD5, 0xE4, 0xF4, 0xE5, 0xF5,
0xC6, 0xD6, 0xC7, 0xD7, 0xE6, 0xF6, 0xE7, 0xF7,
0x08, 0x18, 0x09, 0x19, 0x28, 0x38, 0x29, 0x39,
0x0A, 0x1A, 0x0B, 0x1B, 0x2A, 0x3A, 0x2B, 0x3B,
0x48, 0x58, 0x49, 0x59, 0x68, 0x78, 0x69, 0x79,
0x4A, 0x5A, 0x4B, 0x5B, 0x6A, 0x7A, 0x6B, 0x7B,
0x0C, 0x1C, 0x0D, 0x1D, 0x2C, 0x3C, 0x2D, 0x3D,
0x0E, 0x1E, 0x0F, 0x1F, 0x2E, 0x3E, 0x2F, 0x3F,
0x4C, 0x5C, 0x4D, 0x5D, 0x6C, 0x7C, 0x6D, 0x7D,
0x4E, 0x5E, 0x4F, 0x5F, 0x6E, 0x7E, 0x6F, 0x7F,
0x88, 0x98, 0x89, 0x99, 0xA8, 0xB8, 0xA9, 0xB9,
0x8A, 0x9A, 0x8B, 0x9B, 0xAA, 0xBA, 0xAB, 0xBB,
0xC8, 0xD8, 0xC9, 0xD9, 0xE8, 0xF8, 0xE9, 0xF9,
0xCA, 0xDA, 0xCB, 0xDB, 0xEA, 0xFA, 0xEB, 0xFB,
0x8C, 0x9C, 0x8D, 0x9D, 0xAC, 0xBC, 0xAD, 0xBD,
0x8E, 0x9E, 0x8F, 0x9F, 0xAE, 0xBE, 0xAF, 0xBF,
0xCC, 0xDC, 0xCD, 0xDD, 0xEC, 0xFC, 0xED, 0xFD,
0xCE, 0xDE, 0xCF, 0xDF, 0xEE, 0xFE, 0xEF, 0xFF
);
/**
* Inverse IP mapping helper table.
* Indexing this table with a byte value reverses the bit order.
*
* @var Array
* @access private
*/
var $invipmap = array(
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
);
/**
* Pre-permuted S-box1
*
* Each box ($sbox1-$sbox8) has been vectorized, then each value pre-permuted using the
* P table: concatenation can then be replaced by exclusive ORs.
*
* @var Array
* @access private
*/
var $sbox1 = array(
0x00808200, 0x00000000, 0x00008000, 0x00808202,
0x00808002, 0x00008202, 0x00000002, 0x00008000,
0x00000200, 0x00808200, 0x00808202, 0x00000200,
0x00800202, 0x00808002, 0x00800000, 0x00000002,
0x00000202, 0x00800200, 0x00800200, 0x00008200,
0x00008200, 0x00808000, 0x00808000, 0x00800202,
0x00008002, 0x00800002, 0x00800002, 0x00008002,
0x00000000, 0x00000202, 0x00008202, 0x00800000,
0x00008000, 0x00808202, 0x00000002, 0x00808000,
0x00808200, 0x00800000, 0x00800000, 0x00000200,
0x00808002, 0x00008000, 0x00008200, 0x00800002,
0x00000200, 0x00000002, 0x00800202, 0x00008202,
0x00808202, 0x00008002, 0x00808000, 0x00800202,
0x00800002, 0x00000202, 0x00008202, 0x00808200,
0x00000202, 0x00800200, 0x00800200, 0x00000000,
0x00008002, 0x00008200, 0x00000000, 0x00808002
);
/**
* Pre-permuted S-box2
*
* @var Array
* @access private
*/
var $sbox2 = array(
0x40084010, 0x40004000, 0x00004000, 0x00084010,
0x00080000, 0x00000010, 0x40080010, 0x40004010,
0x40000010, 0x40084010, 0x40084000, 0x40000000,
0x40004000, 0x00080000, 0x00000010, 0x40080010,
0x00084000, 0x00080010, 0x40004010, 0x00000000,
0x40000000, 0x00004000, 0x00084010, 0x40080000,
0x00080010, 0x40000010, 0x00000000, 0x00084000,
0x00004010, 0x40084000, 0x40080000, 0x00004010,
0x00000000, 0x00084010, 0x40080010, 0x00080000,
0x40004010, 0x40080000, 0x40084000, 0x00004000,
0x40080000, 0x40004000, 0x00000010, 0x40084010,
0x00084010, 0x00000010, 0x00004000, 0x40000000,
0x00004010, 0x40084000, 0x00080000, 0x40000010,
0x00080010, 0x40004010, 0x40000010, 0x00080010,
0x00084000, 0x00000000, 0x40004000, 0x00004010,
0x40000000, 0x40080010, 0x40084010, 0x00084000
);
/**
* Pre-permuted S-box3
*
* @var Array
* @access private
*/
var $sbox3 = array(
0x00000104, 0x04010100, 0x00000000, 0x04010004,
0x04000100, 0x00000000, 0x00010104, 0x04000100,
0x00010004, 0x04000004, 0x04000004, 0x00010000,
0x04010104, 0x00010004, 0x04010000, 0x00000104,
0x04000000, 0x00000004, 0x04010100, 0x00000100,
0x00010100, 0x04010000, 0x04010004, 0x00010104,
0x04000104, 0x00010100, 0x00010000, 0x04000104,
0x00000004, 0x04010104, 0x00000100, 0x04000000,
0x04010100, 0x04000000, 0x00010004, 0x00000104,
0x00010000, 0x04010100, 0x04000100, 0x00000000,
0x00000100, 0x00010004, 0x04010104, 0x04000100,
0x04000004, 0x00000100, 0x00000000, 0x04010004,
0x04000104, 0x00010000, 0x04000000, 0x04010104,
0x00000004, 0x00010104, 0x00010100, 0x04000004,
0x04010000, 0x04000104, 0x00000104, 0x04010000,
0x00010104, 0x00000004, 0x04010004, 0x00010100
);
/**
* Pre-permuted S-box4
*
* @var Array
* @access private
*/
var $sbox4 = array(
0x80401000, 0x80001040, 0x80001040, 0x00000040,
0x00401040, 0x80400040, 0x80400000, 0x80001000,
0x00000000, 0x00401000, 0x00401000, 0x80401040,
0x80000040, 0x00000000, 0x00400040, 0x80400000,
0x80000000, 0x00001000, 0x00400000, 0x80401000,
0x00000040, 0x00400000, 0x80001000, 0x00001040,
0x80400040, 0x80000000, 0x00001040, 0x00400040,
0x00001000, 0x00401040, 0x80401040, 0x80000040,
0x00400040, 0x80400000, 0x00401000, 0x80401040,
0x80000040, 0x00000000, 0x00000000, 0x00401000,
0x00001040, 0x00400040, 0x80400040, 0x80000000,
0x80401000, 0x80001040, 0x80001040, 0x00000040,
0x80401040, 0x80000040, 0x80000000, 0x00001000,
0x80400000, 0x80001000, 0x00401040, 0x80400040,
0x80001000, 0x00001040, 0x00400000, 0x80401000,
0x00000040, 0x00400000, 0x00001000, 0x00401040
);
/**
* Pre-permuted S-box5
*
* @var Array
* @access private
*/
var $sbox5 = array(
0x00000080, 0x01040080, 0x01040000, 0x21000080,
0x00040000, 0x00000080, 0x20000000, 0x01040000,
0x20040080, 0x00040000, 0x01000080, 0x20040080,
0x21000080, 0x21040000, 0x00040080, 0x20000000,
0x01000000, 0x20040000, 0x20040000, 0x00000000,
0x20000080, 0x21040080, 0x21040080, 0x01000080,
0x21040000, 0x20000080, 0x00000000, 0x21000000,
0x01040080, 0x01000000, 0x21000000, 0x00040080,
0x00040000, 0x21000080, 0x00000080, 0x01000000,
0x20000000, 0x01040000, 0x21000080, 0x20040080,
0x01000080, 0x20000000, 0x21040000, 0x01040080,
0x20040080, 0x00000080, 0x01000000, 0x21040000,
0x21040080, 0x00040080, 0x21000000, 0x21040080,
0x01040000, 0x00000000, 0x20040000, 0x21000000,
0x00040080, 0x01000080, 0x20000080, 0x00040000,
0x00000000, 0x20040000, 0x01040080, 0x20000080
);
/**
* Pre-permuted S-box6
*
* @var Array
* @access private
*/
var $sbox6 = array(
0x10000008, 0x10200000, 0x00002000, 0x10202008,
0x10200000, 0x00000008, 0x10202008, 0x00200000,
0x10002000, 0x00202008, 0x00200000, 0x10000008,
0x00200008, 0x10002000, 0x10000000, 0x00002008,
0x00000000, 0x00200008, 0x10002008, 0x00002000,
0x00202000, 0x10002008, 0x00000008, 0x10200008,
0x10200008, 0x00000000, 0x00202008, 0x10202000,
0x00002008, 0x00202000, 0x10202000, 0x10000000,
0x10002000, 0x00000008, 0x10200008, 0x00202000,
0x10202008, 0x00200000, 0x00002008, 0x10000008,
0x00200000, 0x10002000, 0x10000000, 0x00002008,
0x10000008, 0x10202008, 0x00202000, 0x10200000,
0x00202008, 0x10202000, 0x00000000, 0x10200008,
0x00000008, 0x00002000, 0x10200000, 0x00202008,
0x00002000, 0x00200008, 0x10002008, 0x00000000,
0x10202000, 0x10000000, 0x00200008, 0x10002008
);
/**
* Pre-permuted S-box7
*
* @var Array
* @access private
*/
var $sbox7 = array(
0x00100000, 0x02100001, 0x02000401, 0x00000000,
0x00000400, 0x02000401, 0x00100401, 0x02100400,
0x02100401, 0x00100000, 0x00000000, 0x02000001,
0x00000001, 0x02000000, 0x02100001, 0x00000401,
0x02000400, 0x00100401, 0x00100001, 0x02000400,
0x02000001, 0x02100000, 0x02100400, 0x00100001,
0x02100000, 0x00000400, 0x00000401, 0x02100401,
0x00100400, 0x00000001, 0x02000000, 0x00100400,
0x02000000, 0x00100400, 0x00100000, 0x02000401,
0x02000401, 0x02100001, 0x02100001, 0x00000001,
0x00100001, 0x02000000, 0x02000400, 0x00100000,
0x02100400, 0x00000401, 0x00100401, 0x02100400,
0x00000401, 0x02000001, 0x02100401, 0x02100000,
0x00100400, 0x00000000, 0x00000001, 0x02100401,
0x00000000, 0x00100401, 0x02100000, 0x00000400,
0x02000001, 0x02000400, 0x00000400, 0x00100001
);
/**
* Pre-permuted S-box8
*
* @var Array
* @access private
*/
var $sbox8 = array(
0x08000820, 0x00000800, 0x00020000, 0x08020820,
0x08000000, 0x08000820, 0x00000020, 0x08000000,
0x00020020, 0x08020000, 0x08020820, 0x00020800,
0x08020800, 0x00020820, 0x00000800, 0x00000020,
0x08020000, 0x08000020, 0x08000800, 0x00000820,
0x00020800, 0x00020020, 0x08020020, 0x08020800,
0x00000820, 0x00000000, 0x00000000, 0x08020020,
0x08000020, 0x08000800, 0x00020820, 0x00020000,
0x00020820, 0x00020000, 0x08020800, 0x00000800,
0x00000020, 0x08020020, 0x00000800, 0x00020820,
0x08000800, 0x00000020, 0x08000020, 0x08020000,
0x08020020, 0x08000000, 0x00020000, 0x08000820,
0x00000000, 0x08020820, 0x00020020, 0x08000020,
0x08020000, 0x08000800, 0x08000820, 0x00000000,
0x08020820, 0x00020800, 0x00020800, 0x00000820,
0x00000820, 0x00020020, 0x08000000, 0x08020800
);
/**
* Default Constructor.
*
* Determines whether or not the mcrypt extension should be used. $mode should only, at present, be
* CRYPT_DES_MODE_ECB or CRYPT_DES_MODE_CBC. If not explictly set, CRYPT_DES_MODE_CBC will be used.
*
* @param optional Integer $mode
* @return Crypt_DES
* @access public
*/
function Crypt_DES($mode = CRYPT_DES_MODE_CBC)
{
if ( !defined('CRYPT_DES_MODE') ) {
switch (true) {
case extension_loaded('mcrypt') && in_array('des', mcrypt_list_algorithms()):
define('CRYPT_DES_MODE', CRYPT_DES_MODE_MCRYPT);
break;
default:
define('CRYPT_DES_MODE', CRYPT_DES_MODE_INTERNAL);
}
}
switch ( CRYPT_DES_MODE ) {
case CRYPT_DES_MODE_MCRYPT:
switch ($mode) {
case CRYPT_DES_MODE_ECB:
$this->paddable = true;
$this->mode = MCRYPT_MODE_ECB;
break;
case CRYPT_DES_MODE_CTR:
$this->mode = 'ctr';
//$this->mode = in_array('ctr', mcrypt_list_modes()) ? 'ctr' : CRYPT_DES_MODE_CTR;
break;
case CRYPT_DES_MODE_CFB:
$this->mode = 'ncfb';
$this->ecb = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_ECB, '');
break;
case CRYPT_DES_MODE_OFB:
$this->mode = MCRYPT_MODE_NOFB;
break;
case CRYPT_DES_MODE_CBC:
default:
$this->paddable = true;
$this->mode = MCRYPT_MODE_CBC;
}
$this->enmcrypt = mcrypt_module_open(MCRYPT_DES, '', $this->mode, '');
$this->demcrypt = mcrypt_module_open(MCRYPT_DES, '', $this->mode, '');
break;
default:
switch ($mode) {
case CRYPT_DES_MODE_ECB:
case CRYPT_DES_MODE_CBC:
$this->paddable = true;
$this->mode = $mode;
break;
case CRYPT_DES_MODE_CTR:
case CRYPT_DES_MODE_CFB:
case CRYPT_DES_MODE_OFB:
$this->mode = $mode;
break;
default:
$this->paddable = true;
$this->mode = CRYPT_DES_MODE_CBC;
}
if (function_exists('create_function') && is_callable('create_function')) {
$this->inline_crypt_setup();
$this->use_inline_crypt = true;
}
}
}
/**
* Sets the key.
*
* Keys can be of any length. DES, itself, uses 64-bit keys (eg. strlen($key) == 8), however, we
* only use the first eight, if $key has more then eight characters in it, and pad $key with the
* null byte if it is less then eight characters long.
*
* DES also requires that every eighth bit be a parity bit, however, we'll ignore that.
*
* If the key is not explicitly set, it'll be assumed to be all zero's.
*
* @access public
* @param String $key
*/
function setKey($key)
{
$this->keys = ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) ? str_pad(substr($key, 0, 8), 8, chr(0)) : $this->_prepareKey($key);
$this->enchanged = true;
$this->dechanged = true;
}
/**
* Sets the password.
*
* Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
* {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2}:
* $hash, $salt, $count
*
* @param String $password
* @param optional String $method
* @access public
*/
function setPassword($password, $method = 'pbkdf2')
{
$key = '';
switch ($method) {
default: // 'pbkdf2'
list(, , $hash, $salt, $count) = func_get_args();
if (!isset($hash)) {
$hash = 'sha1';
}
// WPA and WPA2 use the SSID as the salt
if (!isset($salt)) {
$salt = 'phpseclib/salt';
}
// RFC2898#section-4.2 uses 1,000 iterations by default
// WPA and WPA2 use 4,096.
if (!isset($count)) {
$count = 1000;
}
if (!class_exists('Crypt_Hash')) {
require_once('Crypt/Hash.php');
}
$i = 1;
while (strlen($key) < 8) { // $dkLen == 8
//$dk.= $this->_pbkdf($password, $salt, $count, $i++);
$hmac = new Crypt_Hash();
$hmac->setHash($hash);
$hmac->setKey($password);
$f = $u = $hmac->hash($salt . pack('N', $i++));
for ($j = 2; $j <= $count; $j++) {
$u = $hmac->hash($u);
$f^= $u;
}
$key.= $f;
}
}
$this->setKey($key);
}
/**
* Sets the initialization vector. (optional)
*
* SetIV is not required when CRYPT_DES_MODE_ECB is being used. If not explictly set, it'll be assumed
* to be all zero's.
*
* @access public
* @param String $iv
*/
function setIV($iv)
{
$this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($iv, 0, 8), 8, chr(0));
$this->enchanged = true;
$this->dechanged = true;
}
/**
* Generate CTR XOR encryption key
*
* Encrypt the output of this and XOR it against the ciphertext / plaintext to get the
* plaintext / ciphertext in CTR mode.
*
* @see Crypt_DES::decrypt()
* @see Crypt_DES::encrypt()
* @access public
* @param String $iv
*/
function _generate_xor(&$iv)
{
$xor = $iv;
for ($j = 4; $j <= 8; $j+=4) {
$temp = substr($iv, -$j, 4);
switch ($temp) {
case "\xFF\xFF\xFF\xFF":
$iv = substr_replace($iv, "\x00\x00\x00\x00", -$j, 4);
break;
case "\x7F\xFF\xFF\xFF":
$iv = substr_replace($iv, "\x80\x00\x00\x00", -$j, 4);
break 2;
default:
extract(unpack('Ncount', $temp));
$iv = substr_replace($iv, pack('N', $count + 1), -$j, 4);
break 2;
}
}
return $xor;
}
/**
* Encrypts a message.
*
* $plaintext will be padded with up to 8 additional bytes. Other DES implementations may or may not pad in the
* same manner. Other common approaches to padding and the reasons why it's necessary are discussed in the following
* URL:
*
* {@link http://www.di-mgt.com.au/cryptopad.html http://www.di-mgt.com.au/cryptopad.html}
*
* An alternative to padding is to, separately, send the length of the file. This is what SSH, in fact, does.
* strlen($plaintext) will still need to be a multiple of 8, however, arbitrary values can be added to make it that
* length.
*
* @see Crypt_DES::decrypt()
* @access public
* @param String $plaintext
*/
function encrypt($plaintext)
{
if ($this->paddable) {
$plaintext = $this->_pad($plaintext);
}
if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {
if ($this->enchanged) {
mcrypt_generic_init($this->enmcrypt, $this->keys, $this->encryptIV);
if ($this->mode == 'ncfb') {
mcrypt_generic_init($this->ecb, $this->keys, "\0\0\0\0\0\0\0\0");
}
$this->enchanged = false;
}
if ($this->mode != 'ncfb' || !$this->continuousBuffer) {
$ciphertext = mcrypt_generic($this->enmcrypt, $plaintext);
} else {
$iv = &$this->encryptIV;
$pos = &$this->enbuffer['pos'];
$len = strlen($plaintext);
$ciphertext = '';
$i = 0;
if ($pos) {
$orig_pos = $pos;
$max = 8 - $pos;
if ($len >= $max) {
$i = $max;
$len-= $max;
$pos = 0;
} else {
$i = $len;
$pos+= $len;
$len = 0;
}
$ciphertext = substr($iv, $orig_pos) ^ $plaintext;
$iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
$this->enbuffer['enmcrypt_init'] = true;
}
if ($len >= 8) {
if ($this->enbuffer['enmcrypt_init'] === false || $len > 600) {
if ($this->enbuffer['enmcrypt_init'] === true) {
mcrypt_generic_init($this->enmcrypt, $this->keys, $iv);
$this->enbuffer['enmcrypt_init'] = false;
}
$ciphertext.= mcrypt_generic($this->enmcrypt, substr($plaintext, $i, $len - $len % 8));
$iv = substr($ciphertext, -8);
$len%= 8;
} else {
while ($len >= 8) {
$iv = mcrypt_generic($this->ecb, $iv) ^ substr($plaintext, $i, 8);
$ciphertext.= $iv;
$len-= 8;
$i+= 8;
}
}
}
if ($len) {
$iv = mcrypt_generic($this->ecb, $iv);
$block = $iv ^ substr($plaintext, -$len);
$iv = substr_replace($iv, $block, 0, $len);
$ciphertext.= $block;
$pos = $len;
}
return $ciphertext;
}
if (!$this->continuousBuffer) {
mcrypt_generic_init($this->enmcrypt, $this->keys, $this->encryptIV);
}
return $ciphertext;
}
if (!is_array($this->keys)) {
$this->keys = $this->_prepareKey("\0\0\0\0\0\0\0\0");
}
if ($this->use_inline_crypt) {
$inline = $this->inline_crypt;
return $inline('encrypt', $this, $plaintext);
}
$buffer = &$this->enbuffer;
$continuousBuffer = $this->continuousBuffer;
$ciphertext = '';
switch ($this->mode) {
case CRYPT_DES_MODE_ECB:
for ($i = 0; $i < strlen($plaintext); $i+=8) {
$ciphertext.= $this->_processBlock(substr($plaintext, $i, 8), CRYPT_DES_ENCRYPT);
}
break;
case CRYPT_DES_MODE_CBC:
$xor = $this->encryptIV;
for ($i = 0; $i < strlen($plaintext); $i+=8) {
$block = substr($plaintext, $i, 8);
$block = $this->_processBlock($block ^ $xor, CRYPT_DES_ENCRYPT);
$xor = $block;
$ciphertext.= $block;
}
if ($this->continuousBuffer) {
$this->encryptIV = $xor;
}
break;
case CRYPT_DES_MODE_CTR:
$xor = $this->encryptIV;
if (strlen($buffer['encrypted'])) {
for ($i = 0; $i < strlen($plaintext); $i+=8) {
$block = substr($plaintext, $i, 8);
if (strlen($block) > strlen($buffer['encrypted'])) {
$buffer['encrypted'].= $this->_processBlock($this->_generate_xor($xor), CRYPT_DES_ENCRYPT);
}
$key = $this->_string_shift($buffer['encrypted']);
$ciphertext.= $block ^ $key;
}
} else {
for ($i = 0; $i < strlen($plaintext); $i+=8) {
$block = substr($plaintext, $i, 8);
$key = $this->_processBlock($this->_generate_xor($xor), CRYPT_DES_ENCRYPT);
$ciphertext.= $block ^ $key;
}
}
if ($this->continuousBuffer) {
$this->encryptIV = $xor;
if ($start = strlen($plaintext) & 7) {
$buffer['encrypted'] = substr($key, $start) . $buffer['encrypted'];
}
}
break;
case CRYPT_DES_MODE_CFB:
if ($this->continuousBuffer) {
$iv = &$this->encryptIV;
$pos = &$buffer['pos'];
} else {
$iv = $this->encryptIV;
$pos = 0;
}
$len = strlen($plaintext);
$i = 0;
if ($pos) {
$orig_pos = $pos;
$max = 8 - $pos;
if ($len >= $max) {
$i = $max;
$len-= $max;
$pos = 0;
} else {
$i = $len;
$pos+= $len;
$len = 0;
}
$ciphertext = substr($iv, $orig_pos) ^ $plaintext;
$iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
}
while ($len >= 8) {
$iv = $this->_processBlock($iv, CRYPT_DES_ENCRYPT) ^ substr($plaintext, $i, 8);
$ciphertext.= $iv;
$len-= 8;
$i+= 8;
}
if ($len) {
$iv = $this->_processBlock($iv, CRYPT_DES_ENCRYPT);
$block = $iv ^ substr($plaintext, $i);
$iv = substr_replace($iv, $block, 0, $len);
$ciphertext.= $block;
$pos = $len;
}
return $ciphertext;
case CRYPT_DES_MODE_OFB:
$xor = $this->encryptIV;
if (strlen($buffer['xor'])) {
for ($i = 0; $i < strlen($plaintext); $i+=8) {
$block = substr($plaintext, $i, 8);
if (strlen($block) > strlen($buffer['xor'])) {
$xor = $this->_processBlock($xor, CRYPT_DES_ENCRYPT);
$buffer['xor'].= $xor;
}
$key = $this->_string_shift($buffer['xor']);
$ciphertext.= $block ^ $key;
}
} else {
for ($i = 0; $i < strlen($plaintext); $i+=8) {
$xor = $this->_processBlock($xor, CRYPT_DES_ENCRYPT);
$ciphertext.= substr($plaintext, $i, 8) ^ $xor;
}
$key = $xor;
}
if ($this->continuousBuffer) {
$this->encryptIV = $xor;
if ($start = strlen($plaintext) & 7) {
$buffer['xor'] = substr($key, $start) . $buffer['xor'];
}
}
}
return $ciphertext;
}
/**
* Decrypts a message.
*
* If strlen($ciphertext) is not a multiple of 8, null bytes will be added to the end of the string until it is.
*
* @see Crypt_DES::encrypt()
* @access public
* @param String $ciphertext
*/
function decrypt($ciphertext)
{
if ($this->paddable) {
// we pad with chr(0) since that's what mcrypt_generic does. to quote from http://php.net/function.mcrypt-generic :
// "The data is padded with "\0" to make sure the length of the data is n * blocksize."
$ciphertext = str_pad($ciphertext, (strlen($ciphertext) + 7) & 0xFFFFFFF8, chr(0));
}
if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {
if ($this->dechanged) {
mcrypt_generic_init($this->demcrypt, $this->keys, $this->decryptIV);
if ($this->mode == 'ncfb') {
mcrypt_generic_init($this->ecb, $this->keys, "\0\0\0\0\0\0\0\0");
}
$this->dechanged = false;
}
if ($this->mode != 'ncfb' || !$this->continuousBuffer) {
$plaintext = mdecrypt_generic($this->demcrypt, $ciphertext);
} else {
$iv = &$this->decryptIV;
$pos = &$this->debuffer['pos'];
$len = strlen($ciphertext);
$plaintext = '';
$i = 0;
if ($pos) {
$orig_pos = $pos;
$max = 8 - $pos;
if ($len >= $max) {
$i = $max;
$len-= $max;
$pos = 0;
} else {
$i = $len;
$pos+= $len;
$len = 0;
}
$plaintext = substr($iv, $orig_pos) ^ $ciphertext;
$iv = substr_replace($iv, substr($ciphertext, 0, $i), $orig_pos, $i);
}
if ($len >= 8) {
$cb = substr($ciphertext, $i, $len - $len % 8);
$plaintext.= mcrypt_generic($this->ecb, $iv . $cb) ^ $cb;
$iv = substr($cb, -8);
$len%= 8;
}
if ($len) {
$iv = mcrypt_generic($this->ecb, $iv);
$plaintext.= $iv ^ substr($ciphertext, -$len);
$iv = substr_replace($iv, substr($ciphertext, -$len), 0, $len);
$pos = $len;
}
return $plaintext;
}
if (!$this->continuousBuffer) {
mcrypt_generic_init($this->demcrypt, $this->keys, $this->decryptIV);
}
return $this->paddable ? $this->_unpad($plaintext) : $plaintext;
}
if (!is_array($this->keys)) {
$this->keys = $this->_prepareKey("\0\0\0\0\0\0\0\0");
}
if ($this->use_inline_crypt) {
$inline = $this->inline_crypt;
return $inline('decrypt', $this, $ciphertext);
}
$buffer = &$this->debuffer;
$continuousBuffer = $this->continuousBuffer;
$plaintext = '';
switch ($this->mode) {
case CRYPT_DES_MODE_ECB:
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$plaintext.= $this->_processBlock(substr($ciphertext, $i, 8), CRYPT_DES_DECRYPT);
}
break;
case CRYPT_DES_MODE_CBC:
$xor = $this->decryptIV;
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$block = substr($ciphertext, $i, 8);
$plaintext.= $this->_processBlock($block, CRYPT_DES_DECRYPT) ^ $xor;
$xor = $block;
}
if ($this->continuousBuffer) {
$this->decryptIV = $xor;
}
break;
case CRYPT_DES_MODE_CTR:
$xor = $this->decryptIV;
if (strlen($buffer['ciphertext'])) {
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$block = substr($ciphertext, $i, 8);
if (strlen($block) > strlen($buffer['ciphertext'])) {
$buffer['ciphertext'].= $this->_processBlock($this->_generate_xor($xor), CRYPT_DES_ENCRYPT);
}
$key = $this->_string_shift($buffer['ciphertext']);
$plaintext.= $block ^ $key;
}
} else {
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$block = substr($ciphertext, $i, 8);
$key = $this->_processBlock($this->_generate_xor($xor), CRYPT_DES_ENCRYPT);
$plaintext.= $block ^ $key;
}
}
if ($this->continuousBuffer) {
$this->decryptIV = $xor;
if ($start = strlen($ciphertext) % 8) {
$buffer['ciphertext'] = substr($key, $start) . $buffer['ciphertext'];
}
}
break;
case CRYPT_DES_MODE_CFB:
if ($this->continuousBuffer) {
$iv = &$this->decryptIV;
$pos = &$buffer['pos'];
} else {
$iv = $this->decryptIV;
$pos = 0;
}
$len = strlen($ciphertext);
$i = 0;
if ($pos) {
$orig_pos = $pos;
$max = 8 - $pos;
if ($len >= $max) {
$i = $max;
$len-= $max;
$pos = 0;
} else {
$i = $len;
$pos+= $len;
$len = 0;
}
$plaintext = substr($iv, $orig_pos) ^ $ciphertext;
$iv = substr_replace($iv, substr($ciphertext, 0, $i), $orig_pos, $i);
}
while ($len >= 8) {
$iv = $this->_processBlock($iv, CRYPT_DES_ENCRYPT);
$cb = substr($ciphertext, $i, 8);
$plaintext.= $iv ^ $cb;
$iv = $cb;
$len-= 8;
$i+= 8;
}
if ($len) {
$iv = $this->_processBlock($iv, CRYPT_DES_ENCRYPT);
$plaintext.= $iv ^ substr($ciphertext, $i);
$iv = substr_replace($iv, substr($ciphertext, $i), 0, $len);
$pos = $len;
}
return $plaintext;
case CRYPT_DES_MODE_OFB:
$xor = $this->decryptIV;
if (strlen($buffer['xor'])) {
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$block = substr($ciphertext, $i, 8);
if (strlen($block) > strlen($buffer['xor'])) {
$xor = $this->_processBlock($xor, CRYPT_DES_ENCRYPT);
$buffer['xor'].= $xor;
}
$key = $this->_string_shift($buffer['xor']);
$plaintext.= $block ^ $key;
}
} else {
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$xor = $this->_processBlock($xor, CRYPT_DES_ENCRYPT);
$plaintext.= substr($ciphertext, $i, 8) ^ $xor;
}
$key = $xor;
}
if ($this->continuousBuffer) {
$this->decryptIV = $xor;
if ($start = strlen($ciphertext) % 8) {
$buffer['xor'] = substr($key, $start) . $buffer['xor'];
}
}
}
return $this->paddable ? $this->_unpad($plaintext) : $plaintext;
}
/**
* Treat consecutive "packets" as if they are a continuous buffer.
*
* Say you have a 16-byte plaintext $plaintext. Using the default behavior, the two following code snippets
* will yield different outputs:
*
* <code>
* echo $des->encrypt(substr($plaintext, 0, 8));
* echo $des->encrypt(substr($plaintext, 8, 8));
* </code>
* <code>
* echo $des->encrypt($plaintext);
* </code>
*
* The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates
* another, as demonstrated with the following:
*
* <code>
* $des->encrypt(substr($plaintext, 0, 8));
* echo $des->decrypt($des->encrypt(substr($plaintext, 8, 8)));
* </code>
* <code>
* echo $des->decrypt($des->encrypt(substr($plaintext, 8, 8)));
* </code>
*
* With the continuous buffer disabled, these would yield the same output. With it enabled, they yield different
* outputs. The reason is due to the fact that the initialization vector's change after every encryption /
* decryption round when the continuous buffer is enabled. When it's disabled, they remain constant.
*
* Put another way, when the continuous buffer is enabled, the state of the Crypt_DES() object changes after each
* encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that
* continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them),
* however, they are also less intuitive and more likely to cause you problems.
*
* @see Crypt_DES::disableContinuousBuffer()
* @access public
*/
function enableContinuousBuffer()
{
$this->continuousBuffer = true;
}
/**
* Treat consecutive packets as if they are a discontinuous buffer.
*
* The default behavior.
*
* @see Crypt_DES::enableContinuousBuffer()
* @access public
*/
function disableContinuousBuffer()
{
$this->continuousBuffer = false;
$this->encryptIV = $this->iv;
$this->decryptIV = $this->iv;
$this->enbuffer = array('encrypted' => '', 'xor' => '', 'pos' => 0, 'enmcrypt_init' => true);
$this->debuffer = array('ciphertext' => '', 'xor' => '', 'pos' => 0, 'demcrypt_init' => true);
if (CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT) {
mcrypt_generic_init($this->enmcrypt, $this->keys, $this->iv);
mcrypt_generic_init($this->demcrypt, $this->keys, $this->iv);
}
}
/**
* Pad "packets".
*
* DES works by encrypting eight bytes at a time. If you ever need to encrypt or decrypt something that's not
* a multiple of eight, it becomes necessary to pad the input so that it's length is a multiple of eight.
*
* Padding is enabled by default. Sometimes, however, it is undesirable to pad strings. Such is the case in SSH1,
* where "packets" are padded with random bytes before being encrypted. Unpad these packets and you risk stripping
* away characters that shouldn't be stripped away. (SSH knows how many bytes are added because the length is
* transmitted separately)
*
* @see Crypt_DES::disablePadding()
* @access public
*/
function enablePadding()
{
$this->padding = true;
}
/**
* Do not pad packets.
*
* @see Crypt_DES::enablePadding()
* @access public
*/
function disablePadding()
{
$this->padding = false;
}
/**
* Pads a string
*
* Pads a string using the RSA PKCS padding standards so that its length is a multiple of the blocksize (8).
* 8 - (strlen($text) & 7) bytes are added, each of which is equal to chr(8 - (strlen($text) & 7)
*
* If padding is disabled and $text is not a multiple of the blocksize, the string will be padded regardless
* and padding will, hence forth, be enabled.
*
* @see Crypt_DES::_unpad()
* @access private
*/
function _pad($text)
{
$length = strlen($text);
if (!$this->padding) {
if (($length & 7) == 0) {
return $text;
} else {
user_error("The plaintext's length ($length) is not a multiple of the block size (8)");
$this->padding = true;
}
}
$pad = 8 - ($length & 7);
return str_pad($text, $length + $pad, chr($pad));
}
/**
* Unpads a string
*
* If padding is enabled and the reported padding length is invalid the encryption key will be assumed to be wrong
* and false will be returned.
*
* @see Crypt_DES::_pad()
* @access private
*/
function _unpad($text)
{
if (!$this->padding) {
return $text;
}
$length = ord($text[strlen($text) - 1]);
if (!$length || $length > 8) {
return false;
}
return substr($text, 0, -$length);
}
/**
* Encrypts or decrypts a 64-bit block
*
* $mode should be either CRYPT_DES_ENCRYPT or CRYPT_DES_DECRYPT. See
* {@link http://en.wikipedia.org/wiki/Image:Feistel.png Feistel.png} to get a general
* idea of what this function does.
*
* @access private
* @param String $block
* @param Integer $mode
* @return String
*/
function _processBlock($block, $mode)
{
$shuffle = $this->shuffle;
$invipmap = $this->invipmap;
$ipmap = $this->ipmap;
$sbox1 = $this->sbox1;
$sbox2 = $this->sbox2;
$sbox3 = $this->sbox3;
$sbox4 = $this->sbox4;
$sbox5 = $this->sbox5;
$sbox6 = $this->sbox6;
$sbox7 = $this->sbox7;
$sbox8 = $this->sbox8;
$keys = $this->keys[$mode];
// Do the initial IP permutation.
$t = unpack('Nl/Nr', $block);
list($l, $r) = array($t['l'], $t['r']);
$block = ($shuffle[$ipmap[$r & 0xFF]] & "\x80\x80\x80\x80\x80\x80\x80\x80") |
($shuffle[$ipmap[($r >> 8) & 0xFF]] & "\x40\x40\x40\x40\x40\x40\x40\x40") |
($shuffle[$ipmap[($r >> 16) & 0xFF]] & "\x20\x20\x20\x20\x20\x20\x20\x20") |
($shuffle[$ipmap[($r >> 24) & 0xFF]] & "\x10\x10\x10\x10\x10\x10\x10\x10") |
($shuffle[$ipmap[$l & 0xFF]] & "\x08\x08\x08\x08\x08\x08\x08\x08") |
($shuffle[$ipmap[($l >> 8) & 0xFF]] & "\x04\x04\x04\x04\x04\x04\x04\x04") |
($shuffle[$ipmap[($l >> 16) & 0xFF]] & "\x02\x02\x02\x02\x02\x02\x02\x02") |
($shuffle[$ipmap[($l >> 24) & 0xFF]] & "\x01\x01\x01\x01\x01\x01\x01\x01");
// Extract L0 and R0.
$t = unpack('Nl/Nr', $block);
list($l, $r) = array($t['l'], $t['r']);
// Perform the 16 steps.
for ($i = 0; $i < 16; $i++) {
// start of "the Feistel (F) function" - see the following URL:
// http://en.wikipedia.org/wiki/Image:Data_Encryption_Standard_InfoBox_Diagram.png
// Merge key schedule.
$b1 = (($r >> 3) & 0x1FFFFFFF) ^ ($r << 29) ^ $keys[$i][0];
$b2 = (($r >> 31) & 0x00000001) ^ ($r << 1) ^ $keys[$i][1];
// S-box indexing.
$t = $sbox1[($b1 >> 24) & 0x3F] ^ $sbox2[($b2 >> 24) & 0x3F] ^
$sbox3[($b1 >> 16) & 0x3F] ^ $sbox4[($b2 >> 16) & 0x3F] ^
$sbox5[($b1 >> 8) & 0x3F] ^ $sbox6[($b2 >> 8) & 0x3F] ^
$sbox7[$b1 & 0x3F] ^ $sbox8[$b2 & 0x3F] ^ $l;
// end of "the Feistel (F) function"
$l = $r;
$r = $t;
}
// Perform the inverse IP permutation.
return ($shuffle[$invipmap[($l >> 24) & 0xFF]] & "\x80\x80\x80\x80\x80\x80\x80\x80") |
($shuffle[$invipmap[($r >> 24) & 0xFF]] & "\x40\x40\x40\x40\x40\x40\x40\x40") |
($shuffle[$invipmap[($l >> 16) & 0xFF]] & "\x20\x20\x20\x20\x20\x20\x20\x20") |
($shuffle[$invipmap[($r >> 16) & 0xFF]] & "\x10\x10\x10\x10\x10\x10\x10\x10") |
($shuffle[$invipmap[($l >> 8) & 0xFF]] & "\x08\x08\x08\x08\x08\x08\x08\x08") |
($shuffle[$invipmap[($r >> 8) & 0xFF]] & "\x04\x04\x04\x04\x04\x04\x04\x04") |
($shuffle[$invipmap[$l & 0xFF]] & "\x02\x02\x02\x02\x02\x02\x02\x02") |
($shuffle[$invipmap[$r & 0xFF]] & "\x01\x01\x01\x01\x01\x01\x01\x01");
}
/**
* Creates the key schedule.
*
* @access private
* @param String $key
* @return Array
*/
function _prepareKey($key)
{
static $shifts = array( // number of key bits shifted per round
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
);
static $pc1map = array(
0x00, 0x00, 0x08, 0x08, 0x04, 0x04, 0x0C, 0x0C,
0x02, 0x02, 0x0A, 0x0A, 0x06, 0x06, 0x0E, 0x0E,
0x10, 0x10, 0x18, 0x18, 0x14, 0x14, 0x1C, 0x1C,
0x12, 0x12, 0x1A, 0x1A, 0x16, 0x16, 0x1E, 0x1E,
0x20, 0x20, 0x28, 0x28, 0x24, 0x24, 0x2C, 0x2C,
0x22, 0x22, 0x2A, 0x2A, 0x26, 0x26, 0x2E, 0x2E,
0x30, 0x30, 0x38, 0x38, 0x34, 0x34, 0x3C, 0x3C,
0x32, 0x32, 0x3A, 0x3A, 0x36, 0x36, 0x3E, 0x3E,
0x40, 0x40, 0x48, 0x48, 0x44, 0x44, 0x4C, 0x4C,
0x42, 0x42, 0x4A, 0x4A, 0x46, 0x46, 0x4E, 0x4E,
0x50, 0x50, 0x58, 0x58, 0x54, 0x54, 0x5C, 0x5C,
0x52, 0x52, 0x5A, 0x5A, 0x56, 0x56, 0x5E, 0x5E,
0x60, 0x60, 0x68, 0x68, 0x64, 0x64, 0x6C, 0x6C,
0x62, 0x62, 0x6A, 0x6A, 0x66, 0x66, 0x6E, 0x6E,
0x70, 0x70, 0x78, 0x78, 0x74, 0x74, 0x7C, 0x7C,
0x72, 0x72, 0x7A, 0x7A, 0x76, 0x76, 0x7E, 0x7E,
0x80, 0x80, 0x88, 0x88, 0x84, 0x84, 0x8C, 0x8C,
0x82, 0x82, 0x8A, 0x8A, 0x86, 0x86, 0x8E, 0x8E,
0x90, 0x90, 0x98, 0x98, 0x94, 0x94, 0x9C, 0x9C,
0x92, 0x92, 0x9A, 0x9A, 0x96, 0x96, 0x9E, 0x9E,
0xA0, 0xA0, 0xA8, 0xA8, 0xA4, 0xA4, 0xAC, 0xAC,
0xA2, 0xA2, 0xAA, 0xAA, 0xA6, 0xA6, 0xAE, 0xAE,
0xB0, 0xB0, 0xB8, 0xB8, 0xB4, 0xB4, 0xBC, 0xBC,
0xB2, 0xB2, 0xBA, 0xBA, 0xB6, 0xB6, 0xBE, 0xBE,
0xC0, 0xC0, 0xC8, 0xC8, 0xC4, 0xC4, 0xCC, 0xCC,
0xC2, 0xC2, 0xCA, 0xCA, 0xC6, 0xC6, 0xCE, 0xCE,
0xD0, 0xD0, 0xD8, 0xD8, 0xD4, 0xD4, 0xDC, 0xDC,
0xD2, 0xD2, 0xDA, 0xDA, 0xD6, 0xD6, 0xDE, 0xDE,
0xE0, 0xE0, 0xE8, 0xE8, 0xE4, 0xE4, 0xEC, 0xEC,
0xE2, 0xE2, 0xEA, 0xEA, 0xE6, 0xE6, 0xEE, 0xEE,
0xF0, 0xF0, 0xF8, 0xF8, 0xF4, 0xF4, 0xFC, 0xFC,
0xF2, 0xF2, 0xFA, 0xFA, 0xF6, 0xF6, 0xFE, 0xFE
);
// Mapping tables for the PC-2 transformation.
static $pc2mapc1 = array(
0x00000000, 0x00000400, 0x00200000, 0x00200400,
0x00000001, 0x00000401, 0x00200001, 0x00200401,
0x02000000, 0x02000400, 0x02200000, 0x02200400,
0x02000001, 0x02000401, 0x02200001, 0x02200401
);
static $pc2mapc2 = array(
0x00000000, 0x00000800, 0x08000000, 0x08000800,
0x00010000, 0x00010800, 0x08010000, 0x08010800,
0x00000000, 0x00000800, 0x08000000, 0x08000800,
0x00010000, 0x00010800, 0x08010000, 0x08010800,
0x00000100, 0x00000900, 0x08000100, 0x08000900,
0x00010100, 0x00010900, 0x08010100, 0x08010900,
0x00000100, 0x00000900, 0x08000100, 0x08000900,
0x00010100, 0x00010900, 0x08010100, 0x08010900,
0x00000010, 0x00000810, 0x08000010, 0x08000810,
0x00010010, 0x00010810, 0x08010010, 0x08010810,
0x00000010, 0x00000810, 0x08000010, 0x08000810,
0x00010010, 0x00010810, 0x08010010, 0x08010810,
0x00000110, 0x00000910, 0x08000110, 0x08000910,
0x00010110, 0x00010910, 0x08010110, 0x08010910,
0x00000110, 0x00000910, 0x08000110, 0x08000910,
0x00010110, 0x00010910, 0x08010110, 0x08010910,
0x00040000, 0x00040800, 0x08040000, 0x08040800,
0x00050000, 0x00050800, 0x08050000, 0x08050800,
0x00040000, 0x00040800, 0x08040000, 0x08040800,
0x00050000, 0x00050800, 0x08050000, 0x08050800,
0x00040100, 0x00040900, 0x08040100, 0x08040900,
0x00050100, 0x00050900, 0x08050100, 0x08050900,
0x00040100, 0x00040900, 0x08040100, 0x08040900,
0x00050100, 0x00050900, 0x08050100, 0x08050900,
0x00040010, 0x00040810, 0x08040010, 0x08040810,
0x00050010, 0x00050810, 0x08050010, 0x08050810,
0x00040010, 0x00040810, 0x08040010, 0x08040810,
0x00050010, 0x00050810, 0x08050010, 0x08050810,
0x00040110, 0x00040910, 0x08040110, 0x08040910,
0x00050110, 0x00050910, 0x08050110, 0x08050910,
0x00040110, 0x00040910, 0x08040110, 0x08040910,
0x00050110, 0x00050910, 0x08050110, 0x08050910,
0x01000000, 0x01000800, 0x09000000, 0x09000800,
0x01010000, 0x01010800, 0x09010000, 0x09010800,
0x01000000, 0x01000800, 0x09000000, 0x09000800,
0x01010000, 0x01010800, 0x09010000, 0x09010800,
0x01000100, 0x01000900, 0x09000100, 0x09000900,
0x01010100, 0x01010900, 0x09010100, 0x09010900,
0x01000100, 0x01000900, 0x09000100, 0x09000900,
0x01010100, 0x01010900, 0x09010100, 0x09010900,
0x01000010, 0x01000810, 0x09000010, 0x09000810,
0x01010010, 0x01010810, 0x09010010, 0x09010810,
0x01000010, 0x01000810, 0x09000010, 0x09000810,
0x01010010, 0x01010810, 0x09010010, 0x09010810,
0x01000110, 0x01000910, 0x09000110, 0x09000910,
0x01010110, 0x01010910, 0x09010110, 0x09010910,
0x01000110, 0x01000910, 0x09000110, 0x09000910,
0x01010110, 0x01010910, 0x09010110, 0x09010910,
0x01040000, 0x01040800, 0x09040000, 0x09040800,
0x01050000, 0x01050800, 0x09050000, 0x09050800,
0x01040000, 0x01040800, 0x09040000, 0x09040800,
0x01050000, 0x01050800, 0x09050000, 0x09050800,
0x01040100, 0x01040900, 0x09040100, 0x09040900,
0x01050100, 0x01050900, 0x09050100, 0x09050900,
0x01040100, 0x01040900, 0x09040100, 0x09040900,
0x01050100, 0x01050900, 0x09050100, 0x09050900,
0x01040010, 0x01040810, 0x09040010, 0x09040810,
0x01050010, 0x01050810, 0x09050010, 0x09050810,
0x01040010, 0x01040810, 0x09040010, 0x09040810,
0x01050010, 0x01050810, 0x09050010, 0x09050810,
0x01040110, 0x01040910, 0x09040110, 0x09040910,
0x01050110, 0x01050910, 0x09050110, 0x09050910,
0x01040110, 0x01040910, 0x09040110, 0x09040910,
0x01050110, 0x01050910, 0x09050110, 0x09050910
);
static $pc2mapc3 = array(
0x00000000, 0x00000004, 0x00001000, 0x00001004,
0x00000000, 0x00000004, 0x00001000, 0x00001004,
0x10000000, 0x10000004, 0x10001000, 0x10001004,
0x10000000, 0x10000004, 0x10001000, 0x10001004,
0x00000020, 0x00000024, 0x00001020, 0x00001024,
0x00000020, 0x00000024, 0x00001020, 0x00001024,
0x10000020, 0x10000024, 0x10001020, 0x10001024,
0x10000020, 0x10000024, 0x10001020, 0x10001024,
0x00080000, 0x00080004, 0x00081000, 0x00081004,
0x00080000, 0x00080004, 0x00081000, 0x00081004,
0x10080000, 0x10080004, 0x10081000, 0x10081004,
0x10080000, 0x10080004, 0x10081000, 0x10081004,
0x00080020, 0x00080024, 0x00081020, 0x00081024,
0x00080020, 0x00080024, 0x00081020, 0x00081024,
0x10080020, 0x10080024, 0x10081020, 0x10081024,
0x10080020, 0x10080024, 0x10081020, 0x10081024,
0x20000000, 0x20000004, 0x20001000, 0x20001004,
0x20000000, 0x20000004, 0x20001000, 0x20001004,
0x30000000, 0x30000004, 0x30001000, 0x30001004,
0x30000000, 0x30000004, 0x30001000, 0x30001004,
0x20000020, 0x20000024, 0x20001020, 0x20001024,
0x20000020, 0x20000024, 0x20001020, 0x20001024,
0x30000020, 0x30000024, 0x30001020, 0x30001024,
0x30000020, 0x30000024, 0x30001020, 0x30001024,
0x20080000, 0x20080004, 0x20081000, 0x20081004,
0x20080000, 0x20080004, 0x20081000, 0x20081004,
0x30080000, 0x30080004, 0x30081000, 0x30081004,
0x30080000, 0x30080004, 0x30081000, 0x30081004,
0x20080020, 0x20080024, 0x20081020, 0x20081024,
0x20080020, 0x20080024, 0x20081020, 0x20081024,
0x30080020, 0x30080024, 0x30081020, 0x30081024,
0x30080020, 0x30080024, 0x30081020, 0x30081024,
0x00000002, 0x00000006, 0x00001002, 0x00001006,
0x00000002, 0x00000006, 0x00001002, 0x00001006,
0x10000002, 0x10000006, 0x10001002, 0x10001006,
0x10000002, 0x10000006, 0x10001002, 0x10001006,
0x00000022, 0x00000026, 0x00001022, 0x00001026,
0x00000022, 0x00000026, 0x00001022, 0x00001026,
0x10000022, 0x10000026, 0x10001022, 0x10001026,
0x10000022, 0x10000026, 0x10001022, 0x10001026,
0x00080002, 0x00080006, 0x00081002, 0x00081006,
0x00080002, 0x00080006, 0x00081002, 0x00081006,
0x10080002, 0x10080006, 0x10081002, 0x10081006,
0x10080002, 0x10080006, 0x10081002, 0x10081006,
0x00080022, 0x00080026, 0x00081022, 0x00081026,
0x00080022, 0x00080026, 0x00081022, 0x00081026,
0x10080022, 0x10080026, 0x10081022, 0x10081026,
0x10080022, 0x10080026, 0x10081022, 0x10081026,
0x20000002, 0x20000006, 0x20001002, 0x20001006,
0x20000002, 0x20000006, 0x20001002, 0x20001006,
0x30000002, 0x30000006, 0x30001002, 0x30001006,
0x30000002, 0x30000006, 0x30001002, 0x30001006,
0x20000022, 0x20000026, 0x20001022, 0x20001026,
0x20000022, 0x20000026, 0x20001022, 0x20001026,
0x30000022, 0x30000026, 0x30001022, 0x30001026,
0x30000022, 0x30000026, 0x30001022, 0x30001026,
0x20080002, 0x20080006, 0x20081002, 0x20081006,
0x20080002, 0x20080006, 0x20081002, 0x20081006,
0x30080002, 0x30080006, 0x30081002, 0x30081006,
0x30080002, 0x30080006, 0x30081002, 0x30081006,
0x20080022, 0x20080026, 0x20081022, 0x20081026,
0x20080022, 0x20080026, 0x20081022, 0x20081026,
0x30080022, 0x30080026, 0x30081022, 0x30081026,
0x30080022, 0x30080026, 0x30081022, 0x30081026
);
static $pc2mapc4 = array(
0x00000000, 0x00100000, 0x00000008, 0x00100008,
0x00000200, 0x00100200, 0x00000208, 0x00100208,
0x00000000, 0x00100000, 0x00000008, 0x00100008,
0x00000200, 0x00100200, 0x00000208, 0x00100208,
0x04000000, 0x04100000, 0x04000008, 0x04100008,
0x04000200, 0x04100200, 0x04000208, 0x04100208,
0x04000000, 0x04100000, 0x04000008, 0x04100008,
0x04000200, 0x04100200, 0x04000208, 0x04100208,
0x00002000, 0x00102000, 0x00002008, 0x00102008,
0x00002200, 0x00102200, 0x00002208, 0x00102208,
0x00002000, 0x00102000, 0x00002008, 0x00102008,
0x00002200, 0x00102200, 0x00002208, 0x00102208,
0x04002000, 0x04102000, 0x04002008, 0x04102008,
0x04002200, 0x04102200, 0x04002208, 0x04102208,
0x04002000, 0x04102000, 0x04002008, 0x04102008,
0x04002200, 0x04102200, 0x04002208, 0x04102208,
0x00000000, 0x00100000, 0x00000008, 0x00100008,
0x00000200, 0x00100200, 0x00000208, 0x00100208,
0x00000000, 0x00100000, 0x00000008, 0x00100008,
0x00000200, 0x00100200, 0x00000208, 0x00100208,
0x04000000, 0x04100000, 0x04000008, 0x04100008,
0x04000200, 0x04100200, 0x04000208, 0x04100208,
0x04000000, 0x04100000, 0x04000008, 0x04100008,
0x04000200, 0x04100200, 0x04000208, 0x04100208,
0x00002000, 0x00102000, 0x00002008, 0x00102008,
0x00002200, 0x00102200, 0x00002208, 0x00102208,
0x00002000, 0x00102000, 0x00002008, 0x00102008,
0x00002200, 0x00102200, 0x00002208, 0x00102208,
0x04002000, 0x04102000, 0x04002008, 0x04102008,
0x04002200, 0x04102200, 0x04002208, 0x04102208,
0x04002000, 0x04102000, 0x04002008, 0x04102008,
0x04002200, 0x04102200, 0x04002208, 0x04102208,
0x00020000, 0x00120000, 0x00020008, 0x00120008,
0x00020200, 0x00120200, 0x00020208, 0x00120208,
0x00020000, 0x00120000, 0x00020008, 0x00120008,
0x00020200, 0x00120200, 0x00020208, 0x00120208,
0x04020000, 0x04120000, 0x04020008, 0x04120008,
0x04020200, 0x04120200, 0x04020208, 0x04120208,
0x04020000, 0x04120000, 0x04020008, 0x04120008,
0x04020200, 0x04120200, 0x04020208, 0x04120208,
0x00022000, 0x00122000, 0x00022008, 0x00122008,
0x00022200, 0x00122200, 0x00022208, 0x00122208,
0x00022000, 0x00122000, 0x00022008, 0x00122008,
0x00022200, 0x00122200, 0x00022208, 0x00122208,
0x04022000, 0x04122000, 0x04022008, 0x04122008,
0x04022200, 0x04122200, 0x04022208, 0x04122208,
0x04022000, 0x04122000, 0x04022008, 0x04122008,
0x04022200, 0x04122200, 0x04022208, 0x04122208,
0x00020000, 0x00120000, 0x00020008, 0x00120008,
0x00020200, 0x00120200, 0x00020208, 0x00120208,
0x00020000, 0x00120000, 0x00020008, 0x00120008,
0x00020200, 0x00120200, 0x00020208, 0x00120208,
0x04020000, 0x04120000, 0x04020008, 0x04120008,
0x04020200, 0x04120200, 0x04020208, 0x04120208,
0x04020000, 0x04120000, 0x04020008, 0x04120008,
0x04020200, 0x04120200, 0x04020208, 0x04120208,
0x00022000, 0x00122000, 0x00022008, 0x00122008,
0x00022200, 0x00122200, 0x00022208, 0x00122208,
0x00022000, 0x00122000, 0x00022008, 0x00122008,
0x00022200, 0x00122200, 0x00022208, 0x00122208,
0x04022000, 0x04122000, 0x04022008, 0x04122008,
0x04022200, 0x04122200, 0x04022208, 0x04122208,
0x04022000, 0x04122000, 0x04022008, 0x04122008,
0x04022200, 0x04122200, 0x04022208, 0x04122208
);
static $pc2mapd1 = array(
0x00000000, 0x00000001, 0x08000000, 0x08000001,
0x00200000, 0x00200001, 0x08200000, 0x08200001,
0x00000002, 0x00000003, 0x08000002, 0x08000003,
0x00200002, 0x00200003, 0x08200002, 0x08200003
);
static $pc2mapd2 = array(
0x00000000, 0x00100000, 0x00000800, 0x00100800,
0x00000000, 0x00100000, 0x00000800, 0x00100800,
0x04000000, 0x04100000, 0x04000800, 0x04100800,
0x04000000, 0x04100000, 0x04000800, 0x04100800,
0x00000004, 0x00100004, 0x00000804, 0x00100804,
0x00000004, 0x00100004, 0x00000804, 0x00100804,
0x04000004, 0x04100004, 0x04000804, 0x04100804,
0x04000004, 0x04100004, 0x04000804, 0x04100804,
0x00000000, 0x00100000, 0x00000800, 0x00100800,
0x00000000, 0x00100000, 0x00000800, 0x00100800,
0x04000000, 0x04100000, 0x04000800, 0x04100800,
0x04000000, 0x04100000, 0x04000800, 0x04100800,
0x00000004, 0x00100004, 0x00000804, 0x00100804,
0x00000004, 0x00100004, 0x00000804, 0x00100804,
0x04000004, 0x04100004, 0x04000804, 0x04100804,
0x04000004, 0x04100004, 0x04000804, 0x04100804,
0x00000200, 0x00100200, 0x00000A00, 0x00100A00,
0x00000200, 0x00100200, 0x00000A00, 0x00100A00,
0x04000200, 0x04100200, 0x04000A00, 0x04100A00,
0x04000200, 0x04100200, 0x04000A00, 0x04100A00,
0x00000204, 0x00100204, 0x00000A04, 0x00100A04,
0x00000204, 0x00100204, 0x00000A04, 0x00100A04,
0x04000204, 0x04100204, 0x04000A04, 0x04100A04,
0x04000204, 0x04100204, 0x04000A04, 0x04100A04,
0x00000200, 0x00100200, 0x00000A00, 0x00100A00,
0x00000200, 0x00100200, 0x00000A00, 0x00100A00,
0x04000200, 0x04100200, 0x04000A00, 0x04100A00,
0x04000200, 0x04100200, 0x04000A00, 0x04100A00,
0x00000204, 0x00100204, 0x00000A04, 0x00100A04,
0x00000204, 0x00100204, 0x00000A04, 0x00100A04,
0x04000204, 0x04100204, 0x04000A04, 0x04100A04,
0x04000204, 0x04100204, 0x04000A04, 0x04100A04,
0x00020000, 0x00120000, 0x00020800, 0x00120800,
0x00020000, 0x00120000, 0x00020800, 0x00120800,
0x04020000, 0x04120000, 0x04020800, 0x04120800,
0x04020000, 0x04120000, 0x04020800, 0x04120800,
0x00020004, 0x00120004, 0x00020804, 0x00120804,
0x00020004, 0x00120004, 0x00020804, 0x00120804,
0x04020004, 0x04120004, 0x04020804, 0x04120804,
0x04020004, 0x04120004, 0x04020804, 0x04120804,
0x00020000, 0x00120000, 0x00020800, 0x00120800,
0x00020000, 0x00120000, 0x00020800, 0x00120800,
0x04020000, 0x04120000, 0x04020800, 0x04120800,
0x04020000, 0x04120000, 0x04020800, 0x04120800,
0x00020004, 0x00120004, 0x00020804, 0x00120804,
0x00020004, 0x00120004, 0x00020804, 0x00120804,
0x04020004, 0x04120004, 0x04020804, 0x04120804,
0x04020004, 0x04120004, 0x04020804, 0x04120804,
0x00020200, 0x00120200, 0x00020A00, 0x00120A00,
0x00020200, 0x00120200, 0x00020A00, 0x00120A00,
0x04020200, 0x04120200, 0x04020A00, 0x04120A00,
0x04020200, 0x04120200, 0x04020A00, 0x04120A00,
0x00020204, 0x00120204, 0x00020A04, 0x00120A04,
0x00020204, 0x00120204, 0x00020A04, 0x00120A04,
0x04020204, 0x04120204, 0x04020A04, 0x04120A04,
0x04020204, 0x04120204, 0x04020A04, 0x04120A04,
0x00020200, 0x00120200, 0x00020A00, 0x00120A00,
0x00020200, 0x00120200, 0x00020A00, 0x00120A00,
0x04020200, 0x04120200, 0x04020A00, 0x04120A00,
0x04020200, 0x04120200, 0x04020A00, 0x04120A00,
0x00020204, 0x00120204, 0x00020A04, 0x00120A04,
0x00020204, 0x00120204, 0x00020A04, 0x00120A04,
0x04020204, 0x04120204, 0x04020A04, 0x04120A04,
0x04020204, 0x04120204, 0x04020A04, 0x04120A04
);
static $pc2mapd3 = array(
0x00000000, 0x00010000, 0x02000000, 0x02010000,
0x00000020, 0x00010020, 0x02000020, 0x02010020,
0x00040000, 0x00050000, 0x02040000, 0x02050000,
0x00040020, 0x00050020, 0x02040020, 0x02050020,
0x00002000, 0x00012000, 0x02002000, 0x02012000,
0x00002020, 0x00012020, 0x02002020, 0x02012020,
0x00042000, 0x00052000, 0x02042000, 0x02052000,
0x00042020, 0x00052020, 0x02042020, 0x02052020,
0x00000000, 0x00010000, 0x02000000, 0x02010000,
0x00000020, 0x00010020, 0x02000020, 0x02010020,
0x00040000, 0x00050000, 0x02040000, 0x02050000,
0x00040020, 0x00050020, 0x02040020, 0x02050020,
0x00002000, 0x00012000, 0x02002000, 0x02012000,
0x00002020, 0x00012020, 0x02002020, 0x02012020,
0x00042000, 0x00052000, 0x02042000, 0x02052000,
0x00042020, 0x00052020, 0x02042020, 0x02052020,
0x00000010, 0x00010010, 0x02000010, 0x02010010,
0x00000030, 0x00010030, 0x02000030, 0x02010030,
0x00040010, 0x00050010, 0x02040010, 0x02050010,
0x00040030, 0x00050030, 0x02040030, 0x02050030,
0x00002010, 0x00012010, 0x02002010, 0x02012010,
0x00002030, 0x00012030, 0x02002030, 0x02012030,
0x00042010, 0x00052010, 0x02042010, 0x02052010,
0x00042030, 0x00052030, 0x02042030, 0x02052030,
0x00000010, 0x00010010, 0x02000010, 0x02010010,
0x00000030, 0x00010030, 0x02000030, 0x02010030,
0x00040010, 0x00050010, 0x02040010, 0x02050010,
0x00040030, 0x00050030, 0x02040030, 0x02050030,
0x00002010, 0x00012010, 0x02002010, 0x02012010,
0x00002030, 0x00012030, 0x02002030, 0x02012030,
0x00042010, 0x00052010, 0x02042010, 0x02052010,
0x00042030, 0x00052030, 0x02042030, 0x02052030,
0x20000000, 0x20010000, 0x22000000, 0x22010000,
0x20000020, 0x20010020, 0x22000020, 0x22010020,
0x20040000, 0x20050000, 0x22040000, 0x22050000,
0x20040020, 0x20050020, 0x22040020, 0x22050020,
0x20002000, 0x20012000, 0x22002000, 0x22012000,
0x20002020, 0x20012020, 0x22002020, 0x22012020,
0x20042000, 0x20052000, 0x22042000, 0x22052000,
0x20042020, 0x20052020, 0x22042020, 0x22052020,
0x20000000, 0x20010000, 0x22000000, 0x22010000,
0x20000020, 0x20010020, 0x22000020, 0x22010020,
0x20040000, 0x20050000, 0x22040000, 0x22050000,
0x20040020, 0x20050020, 0x22040020, 0x22050020,
0x20002000, 0x20012000, 0x22002000, 0x22012000,
0x20002020, 0x20012020, 0x22002020, 0x22012020,
0x20042000, 0x20052000, 0x22042000, 0x22052000,
0x20042020, 0x20052020, 0x22042020, 0x22052020,
0x20000010, 0x20010010, 0x22000010, 0x22010010,
0x20000030, 0x20010030, 0x22000030, 0x22010030,
0x20040010, 0x20050010, 0x22040010, 0x22050010,
0x20040030, 0x20050030, 0x22040030, 0x22050030,
0x20002010, 0x20012010, 0x22002010, 0x22012010,
0x20002030, 0x20012030, 0x22002030, 0x22012030,
0x20042010, 0x20052010, 0x22042010, 0x22052010,
0x20042030, 0x20052030, 0x22042030, 0x22052030,
0x20000010, 0x20010010, 0x22000010, 0x22010010,
0x20000030, 0x20010030, 0x22000030, 0x22010030,
0x20040010, 0x20050010, 0x22040010, 0x22050010,
0x20040030, 0x20050030, 0x22040030, 0x22050030,
0x20002010, 0x20012010, 0x22002010, 0x22012010,
0x20002030, 0x20012030, 0x22002030, 0x22012030,
0x20042010, 0x20052010, 0x22042010, 0x22052010,
0x20042030, 0x20052030, 0x22042030, 0x22052030
);
static $pc2mapd4 = array(
0x00000000, 0x00000400, 0x01000000, 0x01000400,
0x00000000, 0x00000400, 0x01000000, 0x01000400,
0x00000100, 0x00000500, 0x01000100, 0x01000500,
0x00000100, 0x00000500, 0x01000100, 0x01000500,
0x10000000, 0x10000400, 0x11000000, 0x11000400,
0x10000000, 0x10000400, 0x11000000, 0x11000400,
0x10000100, 0x10000500, 0x11000100, 0x11000500,
0x10000100, 0x10000500, 0x11000100, 0x11000500,
0x00080000, 0x00080400, 0x01080000, 0x01080400,
0x00080000, 0x00080400, 0x01080000, 0x01080400,
0x00080100, 0x00080500, 0x01080100, 0x01080500,
0x00080100, 0x00080500, 0x01080100, 0x01080500,
0x10080000, 0x10080400, 0x11080000, 0x11080400,
0x10080000, 0x10080400, 0x11080000, 0x11080400,
0x10080100, 0x10080500, 0x11080100, 0x11080500,
0x10080100, 0x10080500, 0x11080100, 0x11080500,
0x00000008, 0x00000408, 0x01000008, 0x01000408,
0x00000008, 0x00000408, 0x01000008, 0x01000408,
0x00000108, 0x00000508, 0x01000108, 0x01000508,
0x00000108, 0x00000508, 0x01000108, 0x01000508,
0x10000008, 0x10000408, 0x11000008, 0x11000408,
0x10000008, 0x10000408, 0x11000008, 0x11000408,
0x10000108, 0x10000508, 0x11000108, 0x11000508,
0x10000108, 0x10000508, 0x11000108, 0x11000508,
0x00080008, 0x00080408, 0x01080008, 0x01080408,
0x00080008, 0x00080408, 0x01080008, 0x01080408,
0x00080108, 0x00080508, 0x01080108, 0x01080508,
0x00080108, 0x00080508, 0x01080108, 0x01080508,
0x10080008, 0x10080408, 0x11080008, 0x11080408,
0x10080008, 0x10080408, 0x11080008, 0x11080408,
0x10080108, 0x10080508, 0x11080108, 0x11080508,
0x10080108, 0x10080508, 0x11080108, 0x11080508,
0x00001000, 0x00001400, 0x01001000, 0x01001400,
0x00001000, 0x00001400, 0x01001000, 0x01001400,
0x00001100, 0x00001500, 0x01001100, 0x01001500,
0x00001100, 0x00001500, 0x01001100, 0x01001500,
0x10001000, 0x10001400, 0x11001000, 0x11001400,
0x10001000, 0x10001400, 0x11001000, 0x11001400,
0x10001100, 0x10001500, 0x11001100, 0x11001500,
0x10001100, 0x10001500, 0x11001100, 0x11001500,
0x00081000, 0x00081400, 0x01081000, 0x01081400,
0x00081000, 0x00081400, 0x01081000, 0x01081400,
0x00081100, 0x00081500, 0x01081100, 0x01081500,
0x00081100, 0x00081500, 0x01081100, 0x01081500,
0x10081000, 0x10081400, 0x11081000, 0x11081400,
0x10081000, 0x10081400, 0x11081000, 0x11081400,
0x10081100, 0x10081500, 0x11081100, 0x11081500,
0x10081100, 0x10081500, 0x11081100, 0x11081500,
0x00001008, 0x00001408, 0x01001008, 0x01001408,
0x00001008, 0x00001408, 0x01001008, 0x01001408,
0x00001108, 0x00001508, 0x01001108, 0x01001508,
0x00001108, 0x00001508, 0x01001108, 0x01001508,
0x10001008, 0x10001408, 0x11001008, 0x11001408,
0x10001008, 0x10001408, 0x11001008, 0x11001408,
0x10001108, 0x10001508, 0x11001108, 0x11001508,
0x10001108, 0x10001508, 0x11001108, 0x11001508,
0x00081008, 0x00081408, 0x01081008, 0x01081408,
0x00081008, 0x00081408, 0x01081008, 0x01081408,
0x00081108, 0x00081508, 0x01081108, 0x01081508,
0x00081108, 0x00081508, 0x01081108, 0x01081508,
0x10081008, 0x10081408, 0x11081008, 0x11081408,
0x10081008, 0x10081408, 0x11081008, 0x11081408,
0x10081108, 0x10081508, 0x11081108, 0x11081508,
0x10081108, 0x10081508, 0x11081108, 0x11081508
);
// pad the key and remove extra characters as appropriate.
$key = str_pad(substr($key, 0, 8), 8, chr(0));
// Perform the PC/1 transformation and compute C and D.
$t = unpack('Nl/Nr', $key);
list($l, $r) = array($t['l'], $t['r']);
$key = ($this->shuffle[$pc1map[$r & 0xFF]] & "\x80\x80\x80\x80\x80\x80\x80\x00") |
($this->shuffle[$pc1map[($r >> 8) & 0xFF]] & "\x40\x40\x40\x40\x40\x40\x40\x00") |
($this->shuffle[$pc1map[($r >> 16) & 0xFF]] & "\x20\x20\x20\x20\x20\x20\x20\x00") |
($this->shuffle[$pc1map[($r >> 24) & 0xFF]] & "\x10\x10\x10\x10\x10\x10\x10\x00") |
($this->shuffle[$pc1map[$l & 0xFF]] & "\x08\x08\x08\x08\x08\x08\x08\x00") |
($this->shuffle[$pc1map[($l >> 8) & 0xFF]] & "\x04\x04\x04\x04\x04\x04\x04\x00") |
($this->shuffle[$pc1map[($l >> 16) & 0xFF]] & "\x02\x02\x02\x02\x02\x02\x02\x00") |
($this->shuffle[$pc1map[($l >> 24) & 0xFF]] & "\x01\x01\x01\x01\x01\x01\x01\x00");
$key = unpack('Nc/Nd', $key);
$c = ($key['c'] >> 4) & 0x0FFFFFFF;
$d = (($key['d'] >> 4) & 0x0FFFFFF0) | ($key['c'] & 0x0F);
$keys = array();
for ($i = 0; $i < 16; $i++) {
$c <<= $shifts[$i];
$c = ($c | ($c >> 28)) & 0x0FFFFFFF;
$d <<= $shifts[$i];
$d = ($d | ($d >> 28)) & 0x0FFFFFFF;
// Perform the PC-2 transformation.
$cp = $pc2mapc1[$c >> 24] | $pc2mapc2[($c >> 16) & 0xFF] |
$pc2mapc3[($c >> 8) & 0xFF] | $pc2mapc4[$c & 0xFF];
$dp = $pc2mapd1[$d >> 24] | $pc2mapd2[($d >> 16) & 0xFF] |
$pc2mapd3[($d >> 8) & 0xFF] | $pc2mapd4[$d & 0xFF];
// Reorder: odd bytes/even bytes. Push the result in key schedule.
$keys[] = array(
($cp & 0xFF000000) | (($cp << 8) & 0x00FF0000) |
(($dp >> 16) & 0x0000FF00) | (($dp >> 8) & 0x000000FF),
(($cp << 8) & 0xFF000000) | (($cp << 16) & 0x00FF0000) |
(($dp >> 8) & 0x0000FF00) | ($dp & 0x000000FF)
);
}
$keys = array(
CRYPT_DES_ENCRYPT => $keys,
CRYPT_DES_DECRYPT => array_reverse($keys),
CRYPT_DES_ENCRYPT_1DIM => array(),
CRYPT_DES_DECRYPT_1DIM => array()
);
// Generate 1-dim arrays for inline en/decrypting
for ($i = 0; $i < 16; ++$i) {
$keys[CRYPT_DES_ENCRYPT_1DIM][] = $keys[CRYPT_DES_ENCRYPT][$i][0];
$keys[CRYPT_DES_ENCRYPT_1DIM][] = $keys[CRYPT_DES_ENCRYPT][$i][1];
$keys[CRYPT_DES_DECRYPT_1DIM][] = $keys[CRYPT_DES_DECRYPT][$i][0];
$keys[CRYPT_DES_DECRYPT_1DIM][] = $keys[CRYPT_DES_DECRYPT][$i][1];
}
return $keys;
}
/**
* String Shift
*
* Inspired by array_shift
*
* @param String $string
* @return String
* @access private
*/
function _string_shift(&$string)
{
$substr = substr($string, 0, 8);
$string = substr($string, 8);
return $substr;
}
/**
* Creates performance-optimized function for de/encrypt(), storing it in $this->inline_crypt
*
* @param optional Integer $des_rounds (1 = DES[default], 3 = TribleDES)
* @access private
*/
function inline_crypt_setup($des_rounds = 1)
{
$lambda_functions =& Crypt_DES::get_lambda_functions();
$block_size = 8;
$mode = $this->mode;
$code_hash = "$mode,$des_rounds";
if (!isset($lambda_functions[$code_hash])) {
// Generating encrypt code:
$ki = -1;
$init_cryptBlock = '
$shuffle = $self->shuffle;
$invipmap = $self->invipmap;
$ipmap = $self->ipmap;
$sbox1 = $self->sbox1;
$sbox2 = $self->sbox2;
$sbox3 = $self->sbox3;
$sbox4 = $self->sbox4;
$sbox5 = $self->sbox5;
$sbox6 = $self->sbox6;
$sbox7 = $self->sbox7;
$sbox8 = $self->sbox8;
';
$_cryptBlock = '$in = unpack("N*", $in);'."\n";
// Do the initial IP permutation.
$_cryptBlock .= '
$l = $in[1];
$r = $in[2];
$in = unpack("N*",
($shuffle[$ipmap[ $r & 0xFF]] & "\x80\x80\x80\x80\x80\x80\x80\x80") |
($shuffle[$ipmap[($r >> 8) & 0xFF]] & "\x40\x40\x40\x40\x40\x40\x40\x40") |
($shuffle[$ipmap[($r >> 16) & 0xFF]] & "\x20\x20\x20\x20\x20\x20\x20\x20") |
($shuffle[$ipmap[($r >> 24) & 0xFF]] & "\x10\x10\x10\x10\x10\x10\x10\x10") |
($shuffle[$ipmap[ $l & 0xFF]] & "\x08\x08\x08\x08\x08\x08\x08\x08") |
($shuffle[$ipmap[($l >> 8) & 0xFF]] & "\x04\x04\x04\x04\x04\x04\x04\x04") |
($shuffle[$ipmap[($l >> 16) & 0xFF]] & "\x02\x02\x02\x02\x02\x02\x02\x02") |
($shuffle[$ipmap[($l >> 24) & 0xFF]] & "\x01\x01\x01\x01\x01\x01\x01\x01")
);
'.'' /* Extract L0 and R0 */ .'
$l = $in[1];
$r = $in[2];
';
$l = 'l';
$r = 'r';
for ($des_round = 0; $des_round < $des_rounds; ++$des_round) {
// Perform the 16 steps.
// start of "the Feistel (F) function" - see the following URL:
// http://en.wikipedia.org/wiki/Image:Data_Encryption_Standard_InfoBox_Diagram.png
// Merge key schedule.
for ($i = 0; $i < 8; ++$i) {
$_cryptBlock .= '
$b1 = (($' . $r . ' >> 3) & 0x1FFFFFFF) ^ ($' . $r . ' << 29) ^ $k_'.(++$ki).';
$b2 = (($' . $r . ' >> 31) & 0x00000001) ^ ($' . $r . ' << 1) ^ $k_'.(++$ki).';
$' . $l . ' = $sbox1[($b1 >> 24) & 0x3F] ^ $sbox2[($b2 >> 24) & 0x3F] ^
$sbox3[($b1 >> 16) & 0x3F] ^ $sbox4[($b2 >> 16) & 0x3F] ^
$sbox5[($b1 >> 8) & 0x3F] ^ $sbox6[($b2 >> 8) & 0x3F] ^
$sbox7[ $b1 & 0x3F] ^ $sbox8[ $b2 & 0x3F] ^ $' . $l . ';
$b1 = (($' . $l . ' >> 3) & 0x1FFFFFFF) ^ ($' . $l . ' << 29) ^ $k_'.(++$ki).';
$b2 = (($' . $l . ' >> 31) & 0x00000001) ^ ($' . $l . ' << 1) ^ $k_'.(++$ki).';
$' . $r . ' = $sbox1[($b1 >> 24) & 0x3F] ^ $sbox2[($b2 >> 24) & 0x3F] ^
$sbox3[($b1 >> 16) & 0x3F] ^ $sbox4[($b2 >> 16) & 0x3F] ^
$sbox5[($b1 >> 8) & 0x3F] ^ $sbox6[($b2 >> 8) & 0x3F] ^
$sbox7[ $b1 & 0x3F] ^ $sbox8[ $b2 & 0x3F] ^ $' . $r . ';
';
}
// Last step should not permute L & R.
$t = $l;
$l = $r;
$r = $t;
}
// Perform the inverse IP permutation.
$_cryptBlock .= '$in = (
($shuffle[$invipmap[($' . $r . ' >> 24) & 0xFF]] & "\x80\x80\x80\x80\x80\x80\x80\x80") |
($shuffle[$invipmap[($' . $l . ' >> 24) & 0xFF]] & "\x40\x40\x40\x40\x40\x40\x40\x40") |
($shuffle[$invipmap[($' . $r . ' >> 16) & 0xFF]] & "\x20\x20\x20\x20\x20\x20\x20\x20") |
($shuffle[$invipmap[($' . $l . ' >> 16) & 0xFF]] & "\x10\x10\x10\x10\x10\x10\x10\x10") |
($shuffle[$invipmap[($' . $r . ' >> 8) & 0xFF]] & "\x08\x08\x08\x08\x08\x08\x08\x08") |
($shuffle[$invipmap[($' . $l . ' >> 8) & 0xFF]] & "\x04\x04\x04\x04\x04\x04\x04\x04") |
($shuffle[$invipmap[ $' . $r . ' & 0xFF]] & "\x02\x02\x02\x02\x02\x02\x02\x02") |
($shuffle[$invipmap[ $' . $l . ' & 0xFF]] & "\x01\x01\x01\x01\x01\x01\x01\x01")
);
';
// Generating mode of operation code:
switch ($mode) {
case CRYPT_DES_MODE_ECB:
$encrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$ciphertext = "";
$plaintext_len = strlen($text);
for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
$in = substr($text, $i, '.$block_size.');
'.$_cryptBlock.'
$ciphertext.= $in;
}
return $ciphertext;
';
$decrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_DECRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$plaintext = "";
$ciphertext_len = strlen($text);
for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
$in = substr($text, $i, '.$block_size.');
'.$_cryptBlock.'
$plaintext.= $in;
}
return $self->_unpad($plaintext);
';
break;
case CRYPT_DES_MODE_CBC:
$encrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$ciphertext = "";
$plaintext_len = strlen($text);
$in = $self->encryptIV;
for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
$in = substr($text, $i, '.$block_size.') ^ $in;
'.$_cryptBlock.'
$ciphertext.= $in;
}
if ($self->continuousBuffer) {
$self->encryptIV = $in;
}
return $ciphertext;
';
$decrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_DECRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$plaintext = "";
$ciphertext_len = strlen($text);
$iv = $self->decryptIV;
for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
$in = $block = substr($text, $i, '.$block_size.');
'.$_cryptBlock.'
$plaintext.= $in ^ $iv;
$iv = $block;
}
if ($self->continuousBuffer) {
$self->decryptIV = $iv;
}
return $self->_unpad($plaintext);
';
break;
case CRYPT_DES_MODE_CTR:
$encrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$ciphertext = "";
$plaintext_len = strlen($text);
$xor = $self->encryptIV;
$buffer = &$self->enbuffer;
if (strlen($buffer["encrypted"])) {
for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
$block = substr($text, $i, '.$block_size.');
if (strlen($block) > strlen($buffer["encrypted"])) {
$in = $self->_generate_xor($xor);
'.$_cryptBlock.'
$buffer["encrypted"].= $in;
}
$key = $self->_string_shift($buffer["encrypted"]);
$ciphertext.= $block ^ $key;
}
} else {
for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
$block = substr($text, $i, '.$block_size.');
$in = $self->_generate_xor($xor);
'.$_cryptBlock.'
$key = $in;
$ciphertext.= $block ^ $key;
}
}
if ($self->continuousBuffer) {
$self->encryptIV = $xor;
if ($start = $plaintext_len % '.$block_size.') {
$buffer["encrypted"] = substr($key, $start) . $buffer["encrypted"];
}
}
return $ciphertext;
';
$decrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$plaintext = "";
$ciphertext_len = strlen($text);
$xor = $self->decryptIV;
$buffer = &$self->debuffer;
if (strlen($buffer["ciphertext"])) {
for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
$block = substr($text, $i, '.$block_size.');
if (strlen($block) > strlen($buffer["ciphertext"])) {
$in = $self->_generate_xor($xor);
'.$_cryptBlock.'
$buffer["ciphertext"].= $in;
}
$key = $self->_string_shift($buffer["ciphertext"]);
$plaintext.= $block ^ $key;
}
} else {
for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
$block = substr($text, $i, '.$block_size.');
$in = $self->_generate_xor($xor);
'.$_cryptBlock.'
$key = $in;
$plaintext.= $block ^ $key;
}
}
if ($self->continuousBuffer) {
$self->decryptIV = $xor;
if ($start = $ciphertext_len % '.$block_size.') {
$buffer["ciphertext"] = substr($key, $start) . $buffer["ciphertext"];
}
}
return $plaintext;
';
break;
case CRYPT_DES_MODE_CFB:
$encrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$ciphertext = "";
$buffer = &$self->enbuffer;
if ($self->continuousBuffer) {
$iv = &$self->encryptIV;
$pos = &$buffer["pos"];
} else {
$iv = $self->encryptIV;
$pos = 0;
}
$len = strlen($text);
$i = 0;
if ($pos) {
$orig_pos = $pos;
$max = '.$block_size.' - $pos;
if ($len >= $max) {
$i = $max;
$len-= $max;
$pos = 0;
} else {
$i = $len;
$pos+= $len;
$len = 0;
}
$ciphertext = substr($iv, $orig_pos) ^ $text;
$iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
}
while ($len >= '.$block_size.') {
$in = $iv;
'.$_cryptBlock.';
$iv = $in ^ substr($text, $i, '.$block_size.');
$ciphertext.= $iv;
$len-= '.$block_size.';
$i+= '.$block_size.';
}
if ($len) {
$in = $iv;
'.$_cryptBlock.'
$iv = $in;
$block = $iv ^ substr($text, $i);
$iv = substr_replace($iv, $block, 0, $len);
$ciphertext.= $block;
$pos = $len;
}
return $ciphertext;
';
$decrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$plaintext = "";
$buffer = &$self->debuffer;
if ($self->continuousBuffer) {
$iv = &$self->decryptIV;
$pos = &$buffer["pos"];
} else {
$iv = $self->decryptIV;
$pos = 0;
}
$len = strlen($text);
$i = 0;
if ($pos) {
$orig_pos = $pos;
$max = '.$block_size.' - $pos;
if ($len >= $max) {
$i = $max;
$len-= $max;
$pos = 0;
} else {
$i = $len;
$pos+= $len;
$len = 0;
}
$plaintext = substr($iv, $orig_pos) ^ $text;
$iv = substr_replace($iv, substr($text, 0, $i), $orig_pos, $i);
}
while ($len >= '.$block_size.') {
$in = $iv;
'.$_cryptBlock.'
$iv = $in;
$cb = substr($text, $i, '.$block_size.');
$plaintext.= $iv ^ $cb;
$iv = $cb;
$len-= '.$block_size.';
$i+= '.$block_size.';
}
if ($len) {
$in = $iv;
'.$_cryptBlock.'
$iv = $in;
$plaintext.= $iv ^ substr($text, $i);
$iv = substr_replace($iv, substr($text, $i), 0, $len);
$pos = $len;
}
return $plaintext;
';
break;
case CRYPT_DES_MODE_OFB:
$encrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$ciphertext = "";
$plaintext_len = strlen($text);
$xor = $self->encryptIV;
$buffer = &$self->enbuffer;
if (strlen($buffer["xor"])) {
for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
$block = substr($text, $i, '.$block_size.');
if (strlen($block) > strlen($buffer["xor"])) {
$in = $xor;
'.$_cryptBlock.'
$xor = $in;
$buffer["xor"].= $xor;
}
$key = $self->_string_shift($buffer["xor"]);
$ciphertext.= $block ^ $key;
}
} else {
for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
$in = $xor;
'.$_cryptBlock.'
$xor = $in;
$ciphertext.= substr($text, $i, '.$block_size.') ^ $xor;
}
$key = $xor;
}
if ($self->continuousBuffer) {
$self->encryptIV = $xor;
if ($start = $plaintext_len % '.$block_size.') {
$buffer["xor"] = substr($key, $start) . $buffer["xor"];
}
}
return $ciphertext;
';
$decrypt = $init_cryptBlock . '
extract($self->keys[CRYPT_DES_ENCRYPT_1DIM], EXTR_PREFIX_ALL, "k");
$plaintext = "";
$ciphertext_len = strlen($text);
$xor = $self->decryptIV;
$buffer = &$self->debuffer;
if (strlen($buffer["xor"])) {
for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
$block = substr($text, $i, '.$block_size.');
if (strlen($block) > strlen($buffer["xor"])) {
$in = $xor;
'.$_cryptBlock.'
$xor = $in;
$buffer["xor"].= $xor;
}
$key = $self->_string_shift($buffer["xor"]);
$plaintext.= $block ^ $key;
}
} else {
for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
$in = $xor;
'.$_cryptBlock.'
$xor = $in;
$plaintext.= substr($text, $i, '.$block_size.') ^ $xor;
}
$key = $xor;
}
if ($self->continuousBuffer) {
$self->decryptIV = $xor;
if ($start = $ciphertext_len % '.$block_size.') {
$buffer["xor"] = substr($key, $start) . $buffer["xor"];
}
}
return $plaintext;
';
break;
}
$lambda_functions[$code_hash] = create_function('$action, &$self, $text', 'if ($action == "encrypt") { '.$encrypt.' } else { '.$decrypt.' }');
}
$this->inline_crypt = $lambda_functions[$code_hash];
}
/**
* Holds the lambda_functions table (classwide)
*
* @see inline_crypt_setup()
* @return Array
* @access private
*/
function &get_lambda_functions()
{
static $functions = array();
return $functions;
}
}
// vim: ts=4:sw=4:et:
// vim6: fdl=1:
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