added phpseclib
This commit is contained in:
Roland Gruber
parent
e3bffe6b7a
commit
722daabb64
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@ -139,4 +139,4 @@ lib/fpdf.php A 2003 Olivier Plathey
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lib/font/Vera* B 2003 Bitstream, Inc.
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templates/lib/wz_tooltip.js C Walter Zorn
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templates/lib/jquery*.js D 2009 John Resig
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lib/3rdParty/phpseclib C Jim Wigginton
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@ -0,0 +1,479 @@
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Pure-PHP implementation of AES.
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*
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* Uses mcrypt, if available, and an internal implementation, otherwise.
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*
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* PHP versions 4 and 5
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*
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* If {@link Crypt_AES::setKeyLength() setKeyLength()} isn't called, it'll be calculated from
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* {@link Crypt_AES::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's 136-bits
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* it'll be null-padded to 160-bits and 160 bits will be the key length until {@link Crypt_Rijndael::setKey() setKey()}
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* is called, again, at which point, it'll be recalculated.
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*
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* Since Crypt_AES extends Crypt_Rijndael, some functions are available to be called that, in the context of AES, don't
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* make a whole lot of sense. {@link Crypt_AES::setBlockLength() setBlockLength()}, for instance. Calling that function,
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* however possible, won't do anything (AES has a fixed block length whereas Rijndael has a variable one).
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*
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* Here's a short example of how to use this library:
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* <code>
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* <?php
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* include('Crypt/AES.php');
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*
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* $aes = new Crypt_AES();
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*
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* $aes->setKey('abcdefghijklmnop');
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*
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* $size = 10 * 1024;
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* $plaintext = '';
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* for ($i = 0; $i < $size; $i++) {
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* $plaintext.= 'a';
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* }
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*
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* echo $aes->decrypt($aes->encrypt($plaintext));
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* ?>
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* </code>
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*
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* LICENSE: This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* @category Crypt
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* @package Crypt_AES
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright MMVIII Jim Wigginton
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* @license http://www.gnu.org/licenses/lgpl.txt
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* @version $Id$
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* @link http://phpseclib.sourceforge.net
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*/
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/**
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* Include Crypt_Rijndael
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*/
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require_once 'Rijndael.php';
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/**#@+
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* @access public
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* @see Crypt_AES::encrypt()
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* @see Crypt_AES::decrypt()
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*/
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/**
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* Encrypt / decrypt using the Counter mode.
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*
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* Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.
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*
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* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
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*/
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define('CRYPT_AES_MODE_CTR', -1);
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/**
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* Encrypt / decrypt using the Electronic Code Book mode.
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*
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* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29
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*/
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define('CRYPT_AES_MODE_ECB', 1);
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/**
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* Encrypt / decrypt using the Code Book Chaining mode.
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*
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* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29
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*/
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define('CRYPT_AES_MODE_CBC', 2);
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/**#@-*/
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/**#@+
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* @access private
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* @see Crypt_AES::Crypt_AES()
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*/
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/**
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* Toggles the internal implementation
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*/
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define('CRYPT_AES_MODE_INTERNAL', 1);
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/**
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* Toggles the mcrypt implementation
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*/
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define('CRYPT_AES_MODE_MCRYPT', 2);
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/**#@-*/
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/**
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* Pure-PHP implementation of AES.
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*
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* @author Jim Wigginton <terrafrost@php.net>
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* @version 0.1.0
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* @access public
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* @package Crypt_AES
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*/
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class Crypt_AES extends Crypt_Rijndael {
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/**
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* mcrypt resource for encryption
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*
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* The mcrypt resource can be recreated every time something needs to be created or it can be created just once.
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* Since mcrypt operates in continuous mode, by default, it'll need to be recreated when in non-continuous mode.
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*
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* @see Crypt_AES::encrypt()
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* @var String
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* @access private
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*/
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var $enmcrypt;
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/**
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* mcrypt resource for decryption
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*
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* The mcrypt resource can be recreated every time something needs to be created or it can be created just once.
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* Since mcrypt operates in continuous mode, by default, it'll need to be recreated when in non-continuous mode.
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*
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* @see Crypt_AES::decrypt()
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* @var String
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* @access private
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*/
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var $demcrypt;
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/**
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* Default Constructor.
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*
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* Determines whether or not the mcrypt extension should be used. $mode should only, at present, be
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* CRYPT_AES_MODE_ECB or CRYPT_AES_MODE_CBC. If not explictly set, CRYPT_AES_MODE_CBC will be used.
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*
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* @param optional Integer $mode
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* @return Crypt_AES
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* @access public
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*/
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function Crypt_AES($mode = CRYPT_AES_MODE_CBC)
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{
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if ( !defined('CRYPT_AES_MODE') ) {
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switch (true) {
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case extension_loaded('mcrypt'):
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// i'd check to see if aes was supported, by doing in_array('des', mcrypt_list_algorithms('')),
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// but since that can be changed after the object has been created, there doesn't seem to be
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// a lot of point...
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define('CRYPT_AES_MODE', CRYPT_AES_MODE_MCRYPT);
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break;
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default:
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define('CRYPT_AES_MODE', CRYPT_AES_MODE_INTERNAL);
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}
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}
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switch ( CRYPT_AES_MODE ) {
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case CRYPT_AES_MODE_MCRYPT:
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switch ($mode) {
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case CRYPT_AES_MODE_ECB:
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$this->mode = MCRYPT_MODE_ECB;
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break;
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case CRYPT_AES_MODE_CTR:
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// ctr doesn't have a constant associated with it even though it appears to be fairly widely
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// supported. in lieu of knowing just how widely supported it is, i've, for now, opted not to
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// include a compatibility layer. the layer has been implemented but, for now, is commented out.
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$this->mode = 'ctr';
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//$this->mode = in_array('ctr', mcrypt_list_modes()) ? 'ctr' : CRYPT_AES_MODE_CTR;
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break;
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case CRYPT_AES_MODE_CBC:
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default:
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$this->mode = MCRYPT_MODE_CBC;
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}
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break;
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default:
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switch ($mode) {
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case CRYPT_AES_MODE_ECB:
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$this->mode = CRYPT_RIJNDAEL_MODE_ECB;
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break;
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case CRYPT_AES_MODE_CTR:
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$this->mode = CRYPT_RIJNDAEL_MODE_CTR;
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break;
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case CRYPT_AES_MODE_CBC:
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default:
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$this->mode = CRYPT_RIJNDAEL_MODE_CBC;
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}
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}
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if (CRYPT_AES_MODE == CRYPT_AES_MODE_INTERNAL) {
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parent::Crypt_Rijndael($this->mode);
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}
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}
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/**
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* Dummy function
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*
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* Since Crypt_AES extends Crypt_Rijndael, this function is, technically, available, but it doesn't do anything.
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*
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* @access public
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* @param Integer $length
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*/
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function setBlockLength($length)
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{
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return;
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}
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/**
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* Encrypts a message.
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*
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* $plaintext will be padded with up to 16 additional bytes. Other AES implementations may or may not pad in the
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* same manner. Other common approaches to padding and the reasons why it's necessary are discussed in the following
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* URL:
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*
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* {@link http://www.di-mgt.com.au/cryptopad.html http://www.di-mgt.com.au/cryptopad.html}
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*
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* An alternative to padding is to, separately, send the length of the file. This is what SSH, in fact, does.
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* strlen($plaintext) will still need to be a multiple of 16, however, arbitrary values can be added to make it that
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* length.
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*
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* @see Crypt_AES::decrypt()
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* @access public
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* @param String $plaintext
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*/
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function encrypt($plaintext)
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{
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if ( CRYPT_AES_MODE == CRYPT_AES_MODE_MCRYPT ) {
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$this->_mcryptSetup();
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/*
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if ($this->mode == CRYPT_AES_MODE_CTR) {
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$iv = $this->encryptIV;
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$xor = mcrypt_generic($this->enmcrypt, $this->_generate_xor(strlen($plaintext), $iv));
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$ciphertext = $plaintext ^ $xor;
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if ($this->continuousBuffer) {
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$this->encryptIV = $iv;
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}
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return $ciphertext;
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}
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*/
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if ($this->mode != 'ctr') {
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$plaintext = $this->_pad($plaintext);
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}
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$ciphertext = mcrypt_generic($this->enmcrypt, $plaintext);
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if (!$this->continuousBuffer) {
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mcrypt_generic_init($this->enmcrypt, $this->key, $this->iv);
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}
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return $ciphertext;
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}
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return parent::encrypt($plaintext);
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}
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/**
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* Decrypts a message.
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*
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* If strlen($ciphertext) is not a multiple of 16, null bytes will be added to the end of the string until it is.
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*
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* @see Crypt_AES::encrypt()
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* @access public
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* @param String $ciphertext
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*/
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function decrypt($ciphertext)
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{
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if ( CRYPT_AES_MODE == CRYPT_AES_MODE_MCRYPT ) {
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$this->_mcryptSetup();
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/*
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if ($this->mode == CRYPT_AES_MODE_CTR) {
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$iv = $this->decryptIV;
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$xor = mcrypt_generic($this->enmcrypt, $this->_generate_xor(strlen($ciphertext), $iv));
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$plaintext = $ciphertext ^ $xor;
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if ($this->continuousBuffer) {
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$this->decryptIV = $iv;
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}
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return $plaintext;
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}
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*/
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if ($this->mode != 'ctr') {
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// we pad with chr(0) since that's what mcrypt_generic does. to quote from http://php.net/function.mcrypt-generic :
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// "The data is padded with "\0" to make sure the length of the data is n * blocksize."
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$ciphertext = str_pad($ciphertext, (strlen($ciphertext) + 15) & 0xFFFFFFF0, chr(0));
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}
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$plaintext = mdecrypt_generic($this->demcrypt, $ciphertext);
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if (!$this->continuousBuffer) {
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mcrypt_generic_init($this->demcrypt, $this->key, $this->iv);
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}
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return $this->mode != 'ctr' ? $this->_unpad($plaintext) : $plaintext;
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}
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return parent::decrypt($ciphertext);
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}
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/**
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* Setup mcrypt
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*
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* Validates all the variables.
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*
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* @access private
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*/
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function _mcryptSetup()
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{
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if (!$this->changed) {
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return;
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}
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if (!$this->explicit_key_length) {
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// this just copied from Crypt_Rijndael::_setup()
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$length = strlen($this->key) >> 2;
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if ($length > 8) {
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$length = 8;
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} else if ($length < 4) {
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$length = 4;
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}
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$this->Nk = $length;
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$this->key_size = $length << 2;
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}
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switch ($this->Nk) {
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case 4: // 128
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$this->key_size = 16;
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break;
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case 5: // 160
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case 6: // 192
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$this->key_size = 24;
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break;
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case 7: // 224
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case 8: // 256
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$this->key_size = 32;
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}
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$this->key = substr($this->key, 0, $this->key_size);
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$this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($this->iv, 0, 16), 16, chr(0));
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if (!isset($this->enmcrypt)) {
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$mode = $this->mode;
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//$mode = $this->mode == CRYPT_AES_MODE_CTR ? MCRYPT_MODE_ECB : $this->mode;
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$this->demcrypt = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', $mode, '');
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$this->enmcrypt = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', $mode, '');
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} // else should mcrypt_generic_deinit be called?
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mcrypt_generic_init($this->demcrypt, $this->key, $this->iv);
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mcrypt_generic_init($this->enmcrypt, $this->key, $this->iv);
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$this->changed = false;
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}
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/**
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* Encrypts a block
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*
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* Optimized over Crypt_Rijndael's implementation by means of loop unrolling.
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*
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* @see Crypt_Rijndael::_encryptBlock()
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* @access private
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* @param String $in
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* @return String
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*/
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function _encryptBlock($in)
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{
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$state = unpack('N*word', $in);
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$Nr = $this->Nr;
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$w = $this->w;
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$t0 = $this->t0;
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$t1 = $this->t1;
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$t2 = $this->t2;
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$t3 = $this->t3;
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// addRoundKey and reindex $state
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$state = array(
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$state['word1'] ^ $w[0][0],
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$state['word2'] ^ $w[0][1],
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$state['word3'] ^ $w[0][2],
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$state['word4'] ^ $w[0][3]
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);
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// shiftRows + subWord + mixColumns + addRoundKey
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// we could loop unroll this and use if statements to do more rounds as necessary, but, in my tests, that yields
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// only a marginal improvement. since that also, imho, hinders the readability of the code, i've opted not to do it.
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for ($round = 1; $round < $this->Nr; $round++) {
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$state = array(
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$t0[$state[0] & 0xFF000000] ^ $t1[$state[1] & 0x00FF0000] ^ $t2[$state[2] & 0x0000FF00] ^ $t3[$state[3] & 0x000000FF] ^ $w[$round][0],
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$t0[$state[1] & 0xFF000000] ^ $t1[$state[2] & 0x00FF0000] ^ $t2[$state[3] & 0x0000FF00] ^ $t3[$state[0] & 0x000000FF] ^ $w[$round][1],
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$t0[$state[2] & 0xFF000000] ^ $t1[$state[3] & 0x00FF0000] ^ $t2[$state[0] & 0x0000FF00] ^ $t3[$state[1] & 0x000000FF] ^ $w[$round][2],
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$t0[$state[3] & 0xFF000000] ^ $t1[$state[0] & 0x00FF0000] ^ $t2[$state[1] & 0x0000FF00] ^ $t3[$state[2] & 0x000000FF] ^ $w[$round][3]
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);
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}
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// subWord
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$state = array(
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$this->_subWord($state[0]),
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$this->_subWord($state[1]),
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$this->_subWord($state[2]),
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$this->_subWord($state[3])
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);
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// shiftRows + addRoundKey
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$state = array(
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($state[0] & 0xFF000000) ^ ($state[1] & 0x00FF0000) ^ ($state[2] & 0x0000FF00) ^ ($state[3] & 0x000000FF) ^ $this->w[$this->Nr][0],
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($state[1] & 0xFF000000) ^ ($state[2] & 0x00FF0000) ^ ($state[3] & 0x0000FF00) ^ ($state[0] & 0x000000FF) ^ $this->w[$this->Nr][1],
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($state[2] & 0xFF000000) ^ ($state[3] & 0x00FF0000) ^ ($state[0] & 0x0000FF00) ^ ($state[1] & 0x000000FF) ^ $this->w[$this->Nr][2],
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($state[3] & 0xFF000000) ^ ($state[0] & 0x00FF0000) ^ ($state[1] & 0x0000FF00) ^ ($state[2] & 0x000000FF) ^ $this->w[$this->Nr][3]
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);
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return pack('N*', $state[0], $state[1], $state[2], $state[3]);
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}
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/**
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* Decrypts a block
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*
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* Optimized over Crypt_Rijndael's implementation by means of loop unrolling.
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*
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* @see Crypt_Rijndael::_decryptBlock()
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* @access private
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* @param String $in
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* @return String
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*/
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function _decryptBlock($in)
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{
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$state = unpack('N*word', $in);
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$Nr = $this->Nr;
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$dw = $this->dw;
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$dt0 = $this->dt0;
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$dt1 = $this->dt1;
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$dt2 = $this->dt2;
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$dt3 = $this->dt3;
|
||||
|
||||
// addRoundKey and reindex $state
|
||||
$state = array(
|
||||
$state['word1'] ^ $dw[$this->Nr][0],
|
||||
$state['word2'] ^ $dw[$this->Nr][1],
|
||||
$state['word3'] ^ $dw[$this->Nr][2],
|
||||
$state['word4'] ^ $dw[$this->Nr][3]
|
||||
);
|
||||
|
||||
|
||||
// invShiftRows + invSubBytes + invMixColumns + addRoundKey
|
||||
for ($round = $this->Nr - 1; $round > 0; $round--) {
|
||||
$state = array(
|
||||
$dt0[$state[0] & 0xFF000000] ^ $dt1[$state[3] & 0x00FF0000] ^ $dt2[$state[2] & 0x0000FF00] ^ $dt3[$state[1] & 0x000000FF] ^ $dw[$round][0],
|
||||
$dt0[$state[1] & 0xFF000000] ^ $dt1[$state[0] & 0x00FF0000] ^ $dt2[$state[3] & 0x0000FF00] ^ $dt3[$state[2] & 0x000000FF] ^ $dw[$round][1],
|
||||
$dt0[$state[2] & 0xFF000000] ^ $dt1[$state[1] & 0x00FF0000] ^ $dt2[$state[0] & 0x0000FF00] ^ $dt3[$state[3] & 0x000000FF] ^ $dw[$round][2],
|
||||
$dt0[$state[3] & 0xFF000000] ^ $dt1[$state[2] & 0x00FF0000] ^ $dt2[$state[1] & 0x0000FF00] ^ $dt3[$state[0] & 0x000000FF] ^ $dw[$round][3]
|
||||
);
|
||||
}
|
||||
|
||||
// invShiftRows + invSubWord + addRoundKey
|
||||
$state = array(
|
||||
$this->_invSubWord(($state[0] & 0xFF000000) ^ ($state[3] & 0x00FF0000) ^ ($state[2] & 0x0000FF00) ^ ($state[1] & 0x000000FF)) ^ $dw[0][0],
|
||||
$this->_invSubWord(($state[1] & 0xFF000000) ^ ($state[0] & 0x00FF0000) ^ ($state[3] & 0x0000FF00) ^ ($state[2] & 0x000000FF)) ^ $dw[0][1],
|
||||
$this->_invSubWord(($state[2] & 0xFF000000) ^ ($state[1] & 0x00FF0000) ^ ($state[0] & 0x0000FF00) ^ ($state[3] & 0x000000FF)) ^ $dw[0][2],
|
||||
$this->_invSubWord(($state[3] & 0xFF000000) ^ ($state[2] & 0x00FF0000) ^ ($state[1] & 0x0000FF00) ^ ($state[0] & 0x000000FF)) ^ $dw[0][3]
|
||||
);
|
||||
|
||||
return pack('N*', $state[0], $state[1], $state[2], $state[3]);
|
||||
}
|
||||
}
|
||||
|
||||
// vim: ts=4:sw=4:et:
|
||||
// vim6: fdl=1:
|
||||
|
|
@ -0,0 +1,945 @@
|
|||
<?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: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Crypt
|
||||
* @package Crypt_DES
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id$
|
||||
* @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);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* @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);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* @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_AES::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_AES::decrypt()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $demcrypt;
|
||||
|
||||
/**
|
||||
* Does the (en|de)mcrypt resource need to be (re)initialized?
|
||||
*
|
||||
* @see setKey()
|
||||
* @see setIV()
|
||||
* @var Boolean
|
||||
* @access private
|
||||
*/
|
||||
var $changed = true;
|
||||
|
||||
/**
|
||||
* 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_MODE_DES_CBC)
|
||||
{
|
||||
if ( !defined('CRYPT_DES_MODE') ) {
|
||||
switch (true) {
|
||||
case extension_loaded('mcrypt'):
|
||||
// i'd check to see if des was supported, by doing in_array('des', mcrypt_list_algorithms('')),
|
||||
// but since that can be changed after the object has been created, there doesn't seem to be
|
||||
// a lot of point...
|
||||
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->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_CBC:
|
||||
default:
|
||||
$this->mode = MCRYPT_MODE_CBC;
|
||||
}
|
||||
|
||||
break;
|
||||
default:
|
||||
switch ($mode) {
|
||||
case CRYPT_DES_MODE_ECB:
|
||||
case CRYPT_DES_MODE_CTR:
|
||||
case CRYPT_DES_MODE_CBC:
|
||||
$this->mode = $mode;
|
||||
break;
|
||||
default:
|
||||
$this->mode = CRYPT_DES_MODE_CBC;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the key.
|
||||
*
|
||||
* Keys can be of any length. DES, itself, uses 64-bit keys (eg. strlen($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)
|
||||
{
|
||||
$this->keys = ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) ? substr($key, 0, 8) : $this->_prepareKey($key);
|
||||
$this->changed = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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->changed = 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 Integer $length
|
||||
* @param String $iv
|
||||
*/
|
||||
function _generate_xor($length, &$iv)
|
||||
{
|
||||
$xor = '';
|
||||
$num_blocks = ($length + 7) >> 3;
|
||||
for ($i = 0; $i < $num_blocks; $i++) {
|
||||
$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->mode != CRYPT_DES_MODE_CTR && $this->mode != 'ctr') {
|
||||
$plaintext = $this->_pad($plaintext);
|
||||
}
|
||||
|
||||
if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {
|
||||
if ($this->changed) {
|
||||
if (!isset($this->enmcrypt)) {
|
||||
$this->enmcrypt = mcrypt_module_open(MCRYPT_DES, '', $this->mode, '');
|
||||
}
|
||||
mcrypt_generic_init($this->enmcrypt, $this->keys, $this->encryptIV);
|
||||
$this->changed = false;
|
||||
}
|
||||
|
||||
$ciphertext = mcrypt_generic($this->enmcrypt, $plaintext);
|
||||
|
||||
if (!$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");
|
||||
}
|
||||
|
||||
$ciphertext = '';
|
||||
switch ($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 = $this->encryptIV;
|
||||
for ($i = 0; $i < strlen($plaintext); $i+=8) {
|
||||
$block = substr($plaintext, $i, 8);
|
||||
$key = $this->_processBlock($this->_generate_xor(8, $xor), CRYPT_DES_ENCRYPT);
|
||||
$ciphertext.= $block ^ $key;
|
||||
}
|
||||
if ($this->continuousBuffer) {
|
||||
$this->encryptIV = $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->mode != CRYPT_DES_MODE_CTR && $this->mode != 'ctr') {
|
||||
// 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->changed) {
|
||||
if (!isset($this->demcrypt)) {
|
||||
$this->demcrypt = mcrypt_module_open(MCRYPT_DES, '', $this->mode, '');
|
||||
}
|
||||
mcrypt_generic_init($this->demcrypt, $this->keys, $this->decryptIV);
|
||||
$this->changed = false;
|
||||
}
|
||||
|
||||
$plaintext = mdecrypt_generic($this->demcrypt, $ciphertext);
|
||||
|
||||
if (!$this->continuousBuffer) {
|
||||
mcrypt_generic_init($this->demcrypt, $this->keys, $this->decryptIV);
|
||||
}
|
||||
|
||||
return $this->mode != 'ctr' ? $this->_unpad($plaintext) : $plaintext;
|
||||
}
|
||||
|
||||
if (!is_array($this->keys)) {
|
||||
$this->keys = $this->_prepareKey("\0\0\0\0\0\0\0\0");
|
||||
}
|
||||
|
||||
$plaintext = '';
|
||||
switch ($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 = $this->decryptIV;
|
||||
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
|
||||
$block = substr($ciphertext, $i, 8);
|
||||
$key = $this->_processBlock($this->_generate_xor(8, $xor), CRYPT_DES_ENCRYPT);
|
||||
$plaintext.= $block ^ $key;
|
||||
}
|
||||
if ($this->continuousBuffer) {
|
||||
$this->decryptIV = $xor;
|
||||
}
|
||||
}
|
||||
|
||||
return $this->mode != CRYPT_DES_MODE_CTR ? $this->_unpad($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;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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)", E_USER_NOTICE);
|
||||
$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)
|
||||
{
|
||||
// s-boxes. in the official DES docs, they're described as being matrices that
|
||||
// one accesses by using the first and last bits to determine the row and the
|
||||
// middle four bits to determine the column. in this implementation, they've
|
||||
// been converted to vectors
|
||||
static $sbox = array(
|
||||
array(
|
||||
14, 0, 4, 15, 13, 7, 1, 4, 2, 14, 15, 2, 11, 13, 8, 1,
|
||||
3, 10 ,10, 6, 6, 12, 12, 11, 5, 9, 9, 5, 0, 3, 7, 8,
|
||||
4, 15, 1, 12, 14, 8, 8, 2, 13, 4, 6, 9, 2, 1, 11, 7,
|
||||
15, 5, 12, 11, 9, 3, 7, 14, 3, 10, 10, 0, 5, 6, 0, 13
|
||||
),
|
||||
array(
|
||||
15, 3, 1, 13, 8, 4, 14, 7, 6, 15, 11, 2, 3, 8, 4, 14,
|
||||
9, 12, 7, 0, 2, 1, 13, 10, 12, 6, 0, 9, 5, 11, 10, 5,
|
||||
0, 13, 14, 8, 7, 10, 11, 1, 10, 3, 4, 15, 13, 4, 1, 2,
|
||||
5, 11, 8, 6, 12, 7, 6, 12, 9, 0, 3, 5, 2, 14, 15, 9
|
||||
),
|
||||
array(
|
||||
10, 13, 0, 7, 9, 0, 14, 9, 6, 3, 3, 4, 15, 6, 5, 10,
|
||||
1, 2, 13, 8, 12, 5, 7, 14, 11, 12, 4, 11, 2, 15, 8, 1,
|
||||
13, 1, 6, 10, 4, 13, 9, 0, 8, 6, 15, 9, 3, 8, 0, 7,
|
||||
11, 4, 1, 15, 2, 14, 12, 3, 5, 11, 10, 5, 14, 2, 7, 12
|
||||
),
|
||||
array(
|
||||
7, 13, 13, 8, 14, 11, 3, 5, 0, 6, 6, 15, 9, 0, 10, 3,
|
||||
1, 4, 2, 7, 8, 2, 5, 12, 11, 1, 12, 10, 4, 14, 15, 9,
|
||||
10, 3, 6, 15, 9, 0, 0, 6, 12, 10, 11, 1, 7, 13, 13, 8,
|
||||
15, 9, 1, 4, 3, 5, 14, 11, 5, 12, 2, 7, 8, 2, 4, 14
|
||||
),
|
||||
array(
|
||||
2, 14, 12, 11, 4, 2, 1, 12, 7, 4, 10, 7, 11, 13, 6, 1,
|
||||
8, 5, 5, 0, 3, 15, 15, 10, 13, 3, 0, 9, 14, 8, 9, 6,
|
||||
4, 11, 2, 8, 1, 12, 11, 7, 10, 1, 13, 14, 7, 2, 8, 13,
|
||||
15, 6, 9, 15, 12, 0, 5, 9, 6, 10, 3, 4, 0, 5, 14, 3
|
||||
),
|
||||
array(
|
||||
12, 10, 1, 15, 10, 4, 15, 2, 9, 7, 2, 12, 6, 9, 8, 5,
|
||||
0, 6, 13, 1, 3, 13, 4, 14, 14, 0, 7, 11, 5, 3, 11, 8,
|
||||
9, 4, 14, 3, 15, 2, 5, 12, 2, 9, 8, 5, 12, 15, 3, 10,
|
||||
7, 11, 0, 14, 4, 1, 10, 7, 1, 6, 13, 0, 11, 8, 6, 13
|
||||
),
|
||||
array(
|
||||
4, 13, 11, 0, 2, 11, 14, 7, 15, 4, 0, 9, 8, 1, 13, 10,
|
||||
3, 14, 12, 3, 9, 5, 7, 12, 5, 2, 10, 15, 6, 8, 1, 6,
|
||||
1, 6, 4, 11, 11, 13, 13, 8, 12, 1, 3, 4, 7, 10, 14, 7,
|
||||
10, 9, 15, 5, 6, 0, 8, 15, 0, 14, 5, 2, 9, 3, 2, 12
|
||||
),
|
||||
array(
|
||||
13, 1, 2, 15, 8, 13, 4, 8, 6, 10, 15, 3, 11, 7, 1, 4,
|
||||
10, 12, 9, 5, 3, 6, 14, 11, 5, 0, 0, 14, 12, 9, 7, 2,
|
||||
7, 2, 11, 1, 4, 14, 1, 7, 9, 4, 12, 10, 14, 8, 2, 13,
|
||||
0, 15, 6, 12, 10, 9, 13, 0, 15, 3, 3, 5, 5, 6, 8, 11
|
||||
)
|
||||
);
|
||||
|
||||
$keys = $this->keys;
|
||||
|
||||
$temp = unpack('Na/Nb', $block);
|
||||
$block = array($temp['a'], $temp['b']);
|
||||
|
||||
// because php does arithmetic right shifts, if the most significant bits are set, right
|
||||
// shifting those into the correct position will add 1's - not 0's. this will intefere
|
||||
// with the | operation unless a second & is done. so we isolate these bits and left shift
|
||||
// them into place. we then & each block with 0x7FFFFFFF to prevennt 1's from being added
|
||||
// for any other shifts.
|
||||
$msb = array(
|
||||
($block[0] >> 31) & 1,
|
||||
($block[1] >> 31) & 1
|
||||
);
|
||||
$block[0] &= 0x7FFFFFFF;
|
||||
$block[1] &= 0x7FFFFFFF;
|
||||
|
||||
// we isolate the appropriate bit in the appropriate integer and shift as appropriate. in
|
||||
// some cases, there are going to be multiple bits in the same integer that need to be shifted
|
||||
// in the same way. we combine those into one shift operation.
|
||||
$block = array(
|
||||
(($block[1] & 0x00000040) << 25) | (($block[1] & 0x00004000) << 16) |
|
||||
(($block[1] & 0x00400001) << 7) | (($block[1] & 0x40000100) >> 2) |
|
||||
(($block[0] & 0x00000040) << 21) | (($block[0] & 0x00004000) << 12) |
|
||||
(($block[0] & 0x00400001) << 3) | (($block[0] & 0x40000100) >> 6) |
|
||||
(($block[1] & 0x00000010) << 19) | (($block[1] & 0x00001000) << 10) |
|
||||
(($block[1] & 0x00100000) << 1) | (($block[1] & 0x10000000) >> 8) |
|
||||
(($block[0] & 0x00000010) << 15) | (($block[0] & 0x00001000) << 6) |
|
||||
(($block[0] & 0x00100000) >> 3) | (($block[0] & 0x10000000) >> 12) |
|
||||
(($block[1] & 0x00000004) << 13) | (($block[1] & 0x00000400) << 4) |
|
||||
(($block[1] & 0x00040000) >> 5) | (($block[1] & 0x04000000) >> 14) |
|
||||
(($block[0] & 0x00000004) << 9) | ( $block[0] & 0x00000400 ) |
|
||||
(($block[0] & 0x00040000) >> 9) | (($block[0] & 0x04000000) >> 18) |
|
||||
(($block[1] & 0x00010000) >> 11) | (($block[1] & 0x01000000) >> 20) |
|
||||
(($block[0] & 0x00010000) >> 15) | (($block[0] & 0x01000000) >> 24)
|
||||
,
|
||||
(($block[1] & 0x00000080) << 24) | (($block[1] & 0x00008000) << 15) |
|
||||
(($block[1] & 0x00800002) << 6) | (($block[0] & 0x00000080) << 20) |
|
||||
(($block[0] & 0x00008000) << 11) | (($block[0] & 0x00800002) << 2) |
|
||||
(($block[1] & 0x00000020) << 18) | (($block[1] & 0x00002000) << 9) |
|
||||
( $block[1] & 0x00200000 ) | (($block[1] & 0x20000000) >> 9) |
|
||||
(($block[0] & 0x00000020) << 14) | (($block[0] & 0x00002000) << 5) |
|
||||
(($block[0] & 0x00200000) >> 4) | (($block[0] & 0x20000000) >> 13) |
|
||||
(($block[1] & 0x00000008) << 12) | (($block[1] & 0x00000800) << 3) |
|
||||
(($block[1] & 0x00080000) >> 6) | (($block[1] & 0x08000000) >> 15) |
|
||||
(($block[0] & 0x00000008) << 8) | (($block[0] & 0x00000800) >> 1) |
|
||||
(($block[0] & 0x00080000) >> 10) | (($block[0] & 0x08000000) >> 19) |
|
||||
(($block[1] & 0x00000200) >> 3) | (($block[0] & 0x00000200) >> 7) |
|
||||
(($block[1] & 0x00020000) >> 12) | (($block[1] & 0x02000000) >> 21) |
|
||||
(($block[0] & 0x00020000) >> 16) | (($block[0] & 0x02000000) >> 25) |
|
||||
($msb[1] << 28) | ($msb[0] << 24)
|
||||
);
|
||||
|
||||
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
|
||||
$temp = (($sbox[0][((($block[1] >> 27) & 0x1F) | (($block[1] & 1) << 5)) ^ $keys[$mode][$i][0]]) << 28)
|
||||
| (($sbox[1][(($block[1] & 0x1F800000) >> 23) ^ $keys[$mode][$i][1]]) << 24)
|
||||
| (($sbox[2][(($block[1] & 0x01F80000) >> 19) ^ $keys[$mode][$i][2]]) << 20)
|
||||
| (($sbox[3][(($block[1] & 0x001F8000) >> 15) ^ $keys[$mode][$i][3]]) << 16)
|
||||
| (($sbox[4][(($block[1] & 0x0001F800) >> 11) ^ $keys[$mode][$i][4]]) << 12)
|
||||
| (($sbox[5][(($block[1] & 0x00001F80) >> 7) ^ $keys[$mode][$i][5]]) << 8)
|
||||
| (($sbox[6][(($block[1] & 0x000001F8) >> 3) ^ $keys[$mode][$i][6]]) << 4)
|
||||
| ( $sbox[7][((($block[1] & 0x1F) << 1) | (($block[1] >> 31) & 1)) ^ $keys[$mode][$i][7]]);
|
||||
|
||||
$msb = ($temp >> 31) & 1;
|
||||
$temp &= 0x7FFFFFFF;
|
||||
$newBlock = (($temp & 0x00010000) << 15) | (($temp & 0x02020120) << 5)
|
||||
| (($temp & 0x00001800) << 17) | (($temp & 0x01000000) >> 10)
|
||||
| (($temp & 0x00000008) << 24) | (($temp & 0x00100000) << 6)
|
||||
| (($temp & 0x00000010) << 21) | (($temp & 0x00008000) << 9)
|
||||
| (($temp & 0x00000200) << 12) | (($temp & 0x10000000) >> 27)
|
||||
| (($temp & 0x00000040) << 14) | (($temp & 0x08000000) >> 8)
|
||||
| (($temp & 0x00004000) << 4) | (($temp & 0x00000002) << 16)
|
||||
| (($temp & 0x00442000) >> 6) | (($temp & 0x40800000) >> 15)
|
||||
| (($temp & 0x00000001) << 11) | (($temp & 0x20000000) >> 20)
|
||||
| (($temp & 0x00080000) >> 13) | (($temp & 0x00000004) << 3)
|
||||
| (($temp & 0x04000000) >> 22) | (($temp & 0x00000480) >> 7)
|
||||
| (($temp & 0x00200000) >> 19) | ($msb << 23);
|
||||
// end of "the Feistel (F) function" - $newBlock is F's output
|
||||
|
||||
$temp = $block[1];
|
||||
$block[1] = $block[0] ^ $newBlock;
|
||||
$block[0] = $temp;
|
||||
}
|
||||
|
||||
$msb = array(
|
||||
($block[0] >> 31) & 1,
|
||||
($block[1] >> 31) & 1
|
||||
);
|
||||
$block[0] &= 0x7FFFFFFF;
|
||||
$block[1] &= 0x7FFFFFFF;
|
||||
|
||||
$block = array(
|
||||
(($block[0] & 0x01000004) << 7) | (($block[1] & 0x01000004) << 6) |
|
||||
(($block[0] & 0x00010000) << 13) | (($block[1] & 0x00010000) << 12) |
|
||||
(($block[0] & 0x00000100) << 19) | (($block[1] & 0x00000100) << 18) |
|
||||
(($block[0] & 0x00000001) << 25) | (($block[1] & 0x00000001) << 24) |
|
||||
(($block[0] & 0x02000008) >> 2) | (($block[1] & 0x02000008) >> 3) |
|
||||
(($block[0] & 0x00020000) << 4) | (($block[1] & 0x00020000) << 3) |
|
||||
(($block[0] & 0x00000200) << 10) | (($block[1] & 0x00000200) << 9) |
|
||||
(($block[0] & 0x00000002) << 16) | (($block[1] & 0x00000002) << 15) |
|
||||
(($block[0] & 0x04000000) >> 11) | (($block[1] & 0x04000000) >> 12) |
|
||||
(($block[0] & 0x00040000) >> 5) | (($block[1] & 0x00040000) >> 6) |
|
||||
(($block[0] & 0x00000400) << 1) | ( $block[1] & 0x00000400 ) |
|
||||
(($block[0] & 0x08000000) >> 20) | (($block[1] & 0x08000000) >> 21) |
|
||||
(($block[0] & 0x00080000) >> 14) | (($block[1] & 0x00080000) >> 15) |
|
||||
(($block[0] & 0x00000800) >> 8) | (($block[1] & 0x00000800) >> 9)
|
||||
,
|
||||
(($block[0] & 0x10000040) << 3) | (($block[1] & 0x10000040) << 2) |
|
||||
(($block[0] & 0x00100000) << 9) | (($block[1] & 0x00100000) << 8) |
|
||||
(($block[0] & 0x00001000) << 15) | (($block[1] & 0x00001000) << 14) |
|
||||
(($block[0] & 0x00000010) << 21) | (($block[1] & 0x00000010) << 20) |
|
||||
(($block[0] & 0x20000080) >> 6) | (($block[1] & 0x20000080) >> 7) |
|
||||
( $block[0] & 0x00200000 ) | (($block[1] & 0x00200000) >> 1) |
|
||||
(($block[0] & 0x00002000) << 6) | (($block[1] & 0x00002000) << 5) |
|
||||
(($block[0] & 0x00000020) << 12) | (($block[1] & 0x00000020) << 11) |
|
||||
(($block[0] & 0x40000000) >> 15) | (($block[1] & 0x40000000) >> 16) |
|
||||
(($block[0] & 0x00400000) >> 9) | (($block[1] & 0x00400000) >> 10) |
|
||||
(($block[0] & 0x00004000) >> 3) | (($block[1] & 0x00004000) >> 4) |
|
||||
(($block[0] & 0x00800000) >> 18) | (($block[1] & 0x00800000) >> 19) |
|
||||
(($block[0] & 0x00008000) >> 12) | (($block[1] & 0x00008000) >> 13) |
|
||||
($msb[0] << 7) | ($msb[1] << 6)
|
||||
);
|
||||
|
||||
return pack('NN', $block[0], $block[1]);
|
||||
}
|
||||
|
||||
/**
|
||||
* 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
|
||||
);
|
||||
|
||||
// pad the key and remove extra characters as appropriate.
|
||||
$key = str_pad(substr($key, 0, 8), 8, chr(0));
|
||||
|
||||
$temp = unpack('Na/Nb', $key);
|
||||
$key = array($temp['a'], $temp['b']);
|
||||
$msb = array(
|
||||
($key[0] >> 31) & 1,
|
||||
($key[1] >> 31) & 1
|
||||
);
|
||||
$key[0] &= 0x7FFFFFFF;
|
||||
$key[1] &= 0x7FFFFFFF;
|
||||
|
||||
$key = array(
|
||||
(($key[1] & 0x00000002) << 26) | (($key[1] & 0x00000204) << 17) |
|
||||
(($key[1] & 0x00020408) << 8) | (($key[1] & 0x02040800) >> 1) |
|
||||
(($key[0] & 0x00000002) << 22) | (($key[0] & 0x00000204) << 13) |
|
||||
(($key[0] & 0x00020408) << 4) | (($key[0] & 0x02040800) >> 5) |
|
||||
(($key[1] & 0x04080000) >> 10) | (($key[0] & 0x04080000) >> 14) |
|
||||
(($key[1] & 0x08000000) >> 19) | (($key[0] & 0x08000000) >> 23) |
|
||||
(($key[0] & 0x00000010) >> 1) | (($key[0] & 0x00001000) >> 10) |
|
||||
(($key[0] & 0x00100000) >> 19) | (($key[0] & 0x10000000) >> 28)
|
||||
,
|
||||
(($key[1] & 0x00000080) << 20) | (($key[1] & 0x00008000) << 11) |
|
||||
(($key[1] & 0x00800000) << 2) | (($key[0] & 0x00000080) << 16) |
|
||||
(($key[0] & 0x00008000) << 7) | (($key[0] & 0x00800000) >> 2) |
|
||||
(($key[1] & 0x00000040) << 13) | (($key[1] & 0x00004000) << 4) |
|
||||
(($key[1] & 0x00400000) >> 5) | (($key[1] & 0x40000000) >> 14) |
|
||||
(($key[0] & 0x00000040) << 9) | ( $key[0] & 0x00004000 ) |
|
||||
(($key[0] & 0x00400000) >> 9) | (($key[0] & 0x40000000) >> 18) |
|
||||
(($key[1] & 0x00000020) << 6) | (($key[1] & 0x00002000) >> 3) |
|
||||
(($key[1] & 0x00200000) >> 12) | (($key[1] & 0x20000000) >> 21) |
|
||||
(($key[0] & 0x00000020) << 2) | (($key[0] & 0x00002000) >> 7) |
|
||||
(($key[0] & 0x00200000) >> 16) | (($key[0] & 0x20000000) >> 25) |
|
||||
(($key[1] & 0x00000010) >> 1) | (($key[1] & 0x00001000) >> 10) |
|
||||
(($key[1] & 0x00100000) >> 19) | (($key[1] & 0x10000000) >> 28) |
|
||||
($msb[1] << 24) | ($msb[0] << 20)
|
||||
);
|
||||
|
||||
$keys = array();
|
||||
for ($i = 0; $i < 16; $i++) {
|
||||
$key[0] <<= $shifts[$i];
|
||||
$temp = ($key[0] & 0xF0000000) >> 28;
|
||||
$key[0] = ($key[0] | $temp) & 0x0FFFFFFF;
|
||||
|
||||
$key[1] <<= $shifts[$i];
|
||||
$temp = ($key[1] & 0xF0000000) >> 28;
|
||||
$key[1] = ($key[1] | $temp) & 0x0FFFFFFF;
|
||||
|
||||
$temp = array(
|
||||
(($key[1] & 0x00004000) >> 9) | (($key[1] & 0x00000800) >> 7) |
|
||||
(($key[1] & 0x00020000) >> 14) | (($key[1] & 0x00000010) >> 2) |
|
||||
(($key[1] & 0x08000000) >> 26) | (($key[1] & 0x00800000) >> 23)
|
||||
,
|
||||
(($key[1] & 0x02400000) >> 20) | (($key[1] & 0x00000001) << 4) |
|
||||
(($key[1] & 0x00002000) >> 10) | (($key[1] & 0x00040000) >> 18) |
|
||||
(($key[1] & 0x00000080) >> 6)
|
||||
,
|
||||
( $key[1] & 0x00000020 ) | (($key[1] & 0x00000200) >> 5) |
|
||||
(($key[1] & 0x00010000) >> 13) | (($key[1] & 0x01000000) >> 22) |
|
||||
(($key[1] & 0x00000004) >> 1) | (($key[1] & 0x00100000) >> 20)
|
||||
,
|
||||
(($key[1] & 0x00001000) >> 7) | (($key[1] & 0x00200000) >> 17) |
|
||||
(($key[1] & 0x00000002) << 2) | (($key[1] & 0x00000100) >> 6) |
|
||||
(($key[1] & 0x00008000) >> 14) | (($key[1] & 0x04000000) >> 26)
|
||||
,
|
||||
(($key[0] & 0x00008000) >> 10) | ( $key[0] & 0x00000010 ) |
|
||||
(($key[0] & 0x02000000) >> 22) | (($key[0] & 0x00080000) >> 17) |
|
||||
(($key[0] & 0x00000200) >> 8) | (($key[0] & 0x00000002) >> 1)
|
||||
,
|
||||
(($key[0] & 0x04000000) >> 21) | (($key[0] & 0x00010000) >> 12) |
|
||||
(($key[0] & 0x00000020) >> 2) | (($key[0] & 0x00000800) >> 9) |
|
||||
(($key[0] & 0x00800000) >> 22) | (($key[0] & 0x00000100) >> 8)
|
||||
,
|
||||
(($key[0] & 0x00001000) >> 7) | (($key[0] & 0x00000088) >> 3) |
|
||||
(($key[0] & 0x00020000) >> 14) | (($key[0] & 0x00000001) << 2) |
|
||||
(($key[0] & 0x00400000) >> 21)
|
||||
,
|
||||
(($key[0] & 0x00000400) >> 5) | (($key[0] & 0x00004000) >> 10) |
|
||||
(($key[0] & 0x00000040) >> 3) | (($key[0] & 0x00100000) >> 18) |
|
||||
(($key[0] & 0x08000000) >> 26) | (($key[0] & 0x01000000) >> 24)
|
||||
);
|
||||
|
||||
$keys[] = $temp;
|
||||
}
|
||||
|
||||
$temp = array(
|
||||
CRYPT_DES_ENCRYPT => $keys,
|
||||
CRYPT_DES_DECRYPT => array_reverse($keys)
|
||||
);
|
||||
|
||||
return $temp;
|
||||
}
|
||||
}
|
||||
|
||||
// vim: ts=4:sw=4:et:
|
||||
// vim6: fdl=1:
|
||||
|
|
@ -0,0 +1,816 @@
|
|||
<?php
|
||||
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
||||
|
||||
/**
|
||||
* Pure-PHP implementations of keyed-hash message authentication codes (HMACs) and various cryptographic hashing functions.
|
||||
*
|
||||
* Uses hash() or mhash() if available and an internal implementation, otherwise. Currently supports the following:
|
||||
*
|
||||
* md2, md5, md5-96, sha1, sha1-96, sha256, sha384, and sha512
|
||||
*
|
||||
* If {@link Crypt_Hash::setKey() setKey()} is called, {@link Crypt_Hash::hash() hash()} will return the HMAC as opposed to
|
||||
* the hash. If no valid algorithm is provided, sha1 will be used.
|
||||
*
|
||||
* PHP versions 4 and 5
|
||||
*
|
||||
* {@internal The variable names are the same as those in
|
||||
* {@link http://tools.ietf.org/html/rfc2104#section-2 RFC2104}.}}
|
||||
*
|
||||
* Here's a short example of how to use this library:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Crypt/Hash.php');
|
||||
*
|
||||
* $hash = new Crypt_Hash('sha1');
|
||||
*
|
||||
* $hash->setKey('abcdefg');
|
||||
*
|
||||
* echo base64_encode($hash->hash('abcdefg'));
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* LICENSE: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Crypt
|
||||
* @package Crypt_Hash
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id$
|
||||
* @link http://phpseclib.sourceforge.net
|
||||
*/
|
||||
|
||||
/**#@+
|
||||
* @access private
|
||||
* @see Crypt_Hash::Crypt_Hash()
|
||||
*/
|
||||
/**
|
||||
* Toggles the internal implementation
|
||||
*/
|
||||
define('CRYPT_HASH_MODE_INTERNAL', 1);
|
||||
/**
|
||||
* Toggles the mhash() implementation, which has been deprecated on PHP 5.3.0+.
|
||||
*/
|
||||
define('CRYPT_HASH_MODE_MHASH', 2);
|
||||
/**
|
||||
* Toggles the hash() implementation, which works on PHP 5.1.2+.
|
||||
*/
|
||||
define('CRYPT_HASH_MODE_HASH', 3);
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* Pure-PHP implementations of keyed-hash message authentication codes (HMACs) and various cryptographic hashing functions.
|
||||
*
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @version 0.1.0
|
||||
* @access public
|
||||
* @package Crypt_Hash
|
||||
*/
|
||||
class Crypt_Hash {
|
||||
/**
|
||||
* Byte-length of compression blocks / key (Internal HMAC)
|
||||
*
|
||||
* @see Crypt_Hash::setAlgorithm()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $b;
|
||||
|
||||
/**
|
||||
* Byte-length of hash output (Internal HMAC)
|
||||
*
|
||||
* @see Crypt_Hash::setHash()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $l = false;
|
||||
|
||||
/**
|
||||
* Hash Algorithm
|
||||
*
|
||||
* @see Crypt_Hash::setHash()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $hash;
|
||||
|
||||
/**
|
||||
* Key
|
||||
*
|
||||
* @see Crypt_Hash::setKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $key = '';
|
||||
|
||||
/**
|
||||
* Outer XOR (Internal HMAC)
|
||||
*
|
||||
* @see Crypt_Hash::setKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $opad;
|
||||
|
||||
/**
|
||||
* Inner XOR (Internal HMAC)
|
||||
*
|
||||
* @see Crypt_Hash::setKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $ipad;
|
||||
|
||||
/**
|
||||
* Default Constructor.
|
||||
*
|
||||
* @param optional String $hash
|
||||
* @return Crypt_Hash
|
||||
* @access public
|
||||
*/
|
||||
function Crypt_Hash($hash = 'sha1')
|
||||
{
|
||||
if ( !defined('CRYPT_HASH_MODE') ) {
|
||||
switch (true) {
|
||||
case extension_loaded('hash'):
|
||||
define('CRYPT_HASH_MODE', CRYPT_HASH_MODE_HASH);
|
||||
break;
|
||||
case extension_loaded('mhash'):
|
||||
define('CRYPT_HASH_MODE', CRYPT_HASH_MODE_MHASH);
|
||||
break;
|
||||
default:
|
||||
define('CRYPT_HASH_MODE', CRYPT_HASH_MODE_INTERNAL);
|
||||
}
|
||||
}
|
||||
|
||||
$this->setHash($hash);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the key for HMACs
|
||||
*
|
||||
* Keys can be of any length.
|
||||
*
|
||||
* @access public
|
||||
* @param String $key
|
||||
*/
|
||||
function setKey($key)
|
||||
{
|
||||
$this->key = $key;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the hash function.
|
||||
*
|
||||
* @access public
|
||||
* @param String $hash
|
||||
*/
|
||||
function setHash($hash)
|
||||
{
|
||||
switch ($hash) {
|
||||
case 'md5-96':
|
||||
case 'sha1-96':
|
||||
$this->l = 12; // 96 / 8 = 12
|
||||
break;
|
||||
case 'md2':
|
||||
case 'md5':
|
||||
$this->l = 16;
|
||||
break;
|
||||
case 'sha1':
|
||||
$this->l = 20;
|
||||
break;
|
||||
case 'sha256':
|
||||
$this->l = 32;
|
||||
break;
|
||||
case 'sha384':
|
||||
$this->l = 48;
|
||||
break;
|
||||
case 'sha512':
|
||||
$this->l = 64;
|
||||
}
|
||||
|
||||
switch ($hash) {
|
||||
case 'md2':
|
||||
$mode = CRYPT_HASH_MODE_INTERNAL;
|
||||
break;
|
||||
case 'sha384':
|
||||
case 'sha512':
|
||||
$mode = CRYPT_HASH_MODE == CRYPT_HASH_MODE_MHASH ? CRYPT_HASH_MODE_INTERNAL : CRYPT_HASH_MODE;
|
||||
break;
|
||||
default:
|
||||
$mode = CRYPT_HASH_MODE;
|
||||
}
|
||||
|
||||
switch ( $mode ) {
|
||||
case CRYPT_HASH_MODE_MHASH:
|
||||
switch ($hash) {
|
||||
case 'md5':
|
||||
case 'md5-96':
|
||||
$this->hash = MHASH_MD5;
|
||||
break;
|
||||
case 'sha256':
|
||||
$this->hash = MHASH_SHA256;
|
||||
break;
|
||||
case 'sha1':
|
||||
case 'sha1-96':
|
||||
default:
|
||||
$this->hash = MHASH_SHA1;
|
||||
}
|
||||
return;
|
||||
case CRYPT_HASH_MODE_HASH:
|
||||
switch ($hash) {
|
||||
case 'md5':
|
||||
case 'md5-96':
|
||||
$this->hash = 'md5';
|
||||
return;
|
||||
case 'sha256':
|
||||
case 'sha384':
|
||||
case 'sha512':
|
||||
$this->hash = $hash;
|
||||
return;
|
||||
case 'sha1':
|
||||
case 'sha1-96':
|
||||
default:
|
||||
$this->hash = 'sha1';
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
switch ($hash) {
|
||||
case 'md2':
|
||||
$this->b = 16;
|
||||
$this->hash = array($this, '_md2');
|
||||
break;
|
||||
case 'md5':
|
||||
case 'md5-96':
|
||||
$this->b = 64;
|
||||
$this->hash = array($this, '_md5');
|
||||
break;
|
||||
case 'sha256':
|
||||
$this->b = 64;
|
||||
$this->hash = array($this, '_sha256');
|
||||
break;
|
||||
case 'sha384':
|
||||
case 'sha512':
|
||||
$this->b = 128;
|
||||
$this->hash = array($this, '_sha512');
|
||||
break;
|
||||
case 'sha1':
|
||||
case 'sha1-96':
|
||||
default:
|
||||
$this->b = 64;
|
||||
$this->hash = array($this, '_sha1');
|
||||
}
|
||||
|
||||
$this->ipad = str_repeat(chr(0x36), $this->b);
|
||||
$this->opad = str_repeat(chr(0x5C), $this->b);
|
||||
}
|
||||
|
||||
/**
|
||||
* Compute the HMAC.
|
||||
*
|
||||
* @access public
|
||||
* @param String $text
|
||||
* @return String
|
||||
*/
|
||||
function hash($text)
|
||||
{
|
||||
$mode = is_array($this->hash) ? CRYPT_HASH_MODE_INTERNAL : CRYPT_HASH_MODE;
|
||||
|
||||
if (!empty($this->key)) {
|
||||
switch ( $mode ) {
|
||||
case CRYPT_HASH_MODE_MHASH:
|
||||
$output = mhash($this->hash, $text, $this->key);
|
||||
break;
|
||||
case CRYPT_HASH_MODE_HASH:
|
||||
$output = hash_hmac($this->hash, $text, $this->key, true);
|
||||
break;
|
||||
case CRYPT_HASH_MODE_INTERNAL:
|
||||
/* "Applications that use keys longer than B bytes will first hash the key using H and then use the
|
||||
resultant L byte string as the actual key to HMAC."
|
||||
|
||||
-- http://tools.ietf.org/html/rfc2104#section-2 */
|
||||
$key = strlen($this->key) > $this->b ? call_user_func($this->$hash, $this->key) : $this->key;
|
||||
|
||||
$key = str_pad($key, $this->b, chr(0)); // step 1
|
||||
$temp = $this->ipad ^ $key; // step 2
|
||||
$temp .= $text; // step 3
|
||||
$temp = call_user_func($this->hash, $temp); // step 4
|
||||
$output = $this->opad ^ $key; // step 5
|
||||
$output.= $temp; // step 6
|
||||
$output = call_user_func($this->hash, $output); // step 7
|
||||
}
|
||||
} else {
|
||||
switch ( $mode ) {
|
||||
case CRYPT_HASH_MODE_MHASH:
|
||||
$output = mhash($this->hash, $text);
|
||||
break;
|
||||
case CRYPT_HASH_MODE_HASH:
|
||||
$output = hash($this->hash, $text, true);
|
||||
break;
|
||||
case CRYPT_HASH_MODE_INTERNAL:
|
||||
$output = call_user_func($this->hash, $text);
|
||||
}
|
||||
}
|
||||
|
||||
return substr($output, 0, $this->l);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the hash length (in bytes)
|
||||
*
|
||||
* @access private
|
||||
* @return Integer
|
||||
*/
|
||||
function getLength()
|
||||
{
|
||||
return $this->l;
|
||||
}
|
||||
|
||||
/**
|
||||
* Wrapper for MD5
|
||||
*
|
||||
* @access private
|
||||
* @param String $text
|
||||
*/
|
||||
function _md5($m)
|
||||
{
|
||||
return pack('H*', md5($m));
|
||||
}
|
||||
|
||||
/**
|
||||
* Wrapper for SHA1
|
||||
*
|
||||
* @access private
|
||||
* @param String $text
|
||||
*/
|
||||
function _sha1($m)
|
||||
{
|
||||
return pack('H*', sha1($m));
|
||||
}
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of MD2
|
||||
*
|
||||
* See {@link http://tools.ietf.org/html/rfc1319 RFC1319}.
|
||||
*
|
||||
* @access private
|
||||
* @param String $text
|
||||
*/
|
||||
function _md2($m)
|
||||
{
|
||||
static $s = array(
|
||||
41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
|
||||
19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
|
||||
76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
|
||||
138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
|
||||
245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
|
||||
148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
|
||||
39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
|
||||
181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
|
||||
150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
|
||||
112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
|
||||
96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
|
||||
85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
|
||||
234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
|
||||
129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
|
||||
8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
|
||||
203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
|
||||
166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
|
||||
31, 26, 219, 153, 141, 51, 159, 17, 131, 20
|
||||
);
|
||||
|
||||
// Step 1. Append Padding Bytes
|
||||
$pad = 16 - (strlen($m) & 0xF);
|
||||
$m.= str_repeat(chr($pad), $pad);
|
||||
|
||||
$length = strlen($m);
|
||||
|
||||
// Step 2. Append Checksum
|
||||
$c = str_repeat(chr(0), 16);
|
||||
$l = chr(0);
|
||||
for ($i = 0; $i < $length; $i+= 16) {
|
||||
for ($j = 0; $j < 16; $j++) {
|
||||
$c[$j] = chr($s[ord($m[$i + $j] ^ $l)]);
|
||||
$l = $c[$j];
|
||||
}
|
||||
}
|
||||
$m.= $c;
|
||||
|
||||
$length+= 16;
|
||||
|
||||
// Step 3. Initialize MD Buffer
|
||||
$x = str_repeat(chr(0), 48);
|
||||
|
||||
// Step 4. Process Message in 16-Byte Blocks
|
||||
for ($i = 0; $i < $length; $i+= 16) {
|
||||
for ($j = 0; $j < 16; $j++) {
|
||||
$x[$j + 16] = $m[$i + $j];
|
||||
$x[$j + 32] = $x[$j + 16] ^ $x[$j];
|
||||
}
|
||||
$t = chr(0);
|
||||
for ($j = 0; $j < 18; $j++) {
|
||||
for ($k = 0; $k < 48; $k++) {
|
||||
$x[$k] = $t = $x[$k] ^ chr($s[ord($t)]);
|
||||
//$t = $x[$k] = $x[$k] ^ chr($s[ord($t)]);
|
||||
}
|
||||
$t = chr(ord($t) + $j);
|
||||
}
|
||||
}
|
||||
|
||||
// Step 5. Output
|
||||
return substr($x, 0, 16);
|
||||
}
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of SHA256
|
||||
*
|
||||
* See {@link http://en.wikipedia.org/wiki/SHA_hash_functions#SHA-256_.28a_SHA-2_variant.29_pseudocode SHA-256 (a SHA-2 variant) pseudocode - Wikipedia}.
|
||||
*
|
||||
* @access private
|
||||
* @param String $text
|
||||
*/
|
||||
function _sha256($m)
|
||||
{
|
||||
if (extension_loaded('suhosin')) {
|
||||
return pack('H*', sha256($m));
|
||||
}
|
||||
|
||||
// Initialize variables
|
||||
$hash = array(
|
||||
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
|
||||
);
|
||||
// Initialize table of round constants
|
||||
// (first 32 bits of the fractional parts of the cube roots of the first 64 primes 2..311)
|
||||
static $k = array(
|
||||
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
|
||||
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
|
||||
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
|
||||
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
|
||||
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
|
||||
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
|
||||
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
|
||||
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
|
||||
);
|
||||
|
||||
// Pre-processing
|
||||
$length = strlen($m);
|
||||
// to round to nearest 56 mod 64, we'll add 64 - (length + (64 - 56)) % 64
|
||||
$m.= str_repeat(chr(0), 64 - (($length + 8) & 0x3F));
|
||||
$m[$length] = chr(0x80);
|
||||
// we don't support hashing strings 512MB long
|
||||
$m.= pack('N2', 0, $length << 3);
|
||||
|
||||
// Process the message in successive 512-bit chunks
|
||||
$chunks = str_split($m, 64);
|
||||
foreach ($chunks as $chunk) {
|
||||
$w = array();
|
||||
for ($i = 0; $i < 16; $i++) {
|
||||
extract(unpack('Ntemp', $this->_string_shift($chunk, 4)));
|
||||
$w[] = $temp;
|
||||
}
|
||||
|
||||
// Extend the sixteen 32-bit words into sixty-four 32-bit words
|
||||
for ($i = 16; $i < 64; $i++) {
|
||||
$s0 = $this->_rightRotate($w[$i - 15], 7) ^
|
||||
$this->_rightRotate($w[$i - 15], 18) ^
|
||||
$this->_rightShift( $w[$i - 15], 3);
|
||||
$s1 = $this->_rightRotate($w[$i - 2], 17) ^
|
||||
$this->_rightRotate($w[$i - 2], 19) ^
|
||||
$this->_rightShift( $w[$i - 2], 10);
|
||||
$w[$i] = $this->_add($w[$i - 16], $s0, $w[$i - 7], $s1);
|
||||
|
||||
}
|
||||
|
||||
// Initialize hash value for this chunk
|
||||
list($a, $b, $c, $d, $e, $f, $g, $h) = $hash;
|
||||
|
||||
// Main loop
|
||||
for ($i = 0; $i < 64; $i++) {
|
||||
$s0 = $this->_rightRotate($a, 2) ^
|
||||
$this->_rightRotate($a, 13) ^
|
||||
$this->_rightRotate($a, 22);
|
||||
$maj = ($a & $b) ^
|
||||
($a & $c) ^
|
||||
($b & $c);
|
||||
$t2 = $this->_add($s0, $maj);
|
||||
|
||||
$s1 = $this->_rightRotate($e, 6) ^
|
||||
$this->_rightRotate($e, 11) ^
|
||||
$this->_rightRotate($e, 25);
|
||||
$ch = ($e & $f) ^
|
||||
($this->_not($e) & $g);
|
||||
$t1 = $this->_add($h, $s1, $ch, $k[$i], $w[$i]);
|
||||
|
||||
$h = $g;
|
||||
$g = $f;
|
||||
$f = $e;
|
||||
$e = $this->_add($d, $t1);
|
||||
$d = $c;
|
||||
$c = $b;
|
||||
$b = $a;
|
||||
$a = $this->_add($t1, $t2);
|
||||
}
|
||||
|
||||
// Add this chunk's hash to result so far
|
||||
$hash = array(
|
||||
$this->_add($hash[0], $a),
|
||||
$this->_add($hash[1], $b),
|
||||
$this->_add($hash[2], $c),
|
||||
$this->_add($hash[3], $d),
|
||||
$this->_add($hash[4], $e),
|
||||
$this->_add($hash[5], $f),
|
||||
$this->_add($hash[6], $g),
|
||||
$this->_add($hash[7], $h)
|
||||
);
|
||||
}
|
||||
|
||||
// Produce the final hash value (big-endian)
|
||||
return pack('N8', $hash[0], $hash[1], $hash[2], $hash[3], $hash[4], $hash[5], $hash[6], $hash[7]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of SHA384 and SHA512
|
||||
*
|
||||
* @access private
|
||||
* @param String $text
|
||||
*/
|
||||
function _sha512($m)
|
||||
{
|
||||
if (!class_exists('Math_BigInteger')) {
|
||||
require_once('Math/BigInteger.php');
|
||||
}
|
||||
|
||||
static $init384, $init512, $k;
|
||||
|
||||
if (!isset($k)) {
|
||||
// Initialize variables
|
||||
$init384 = array( // initial values for SHA384
|
||||
'cbbb9d5dc1059ed8', '629a292a367cd507', '9159015a3070dd17', '152fecd8f70e5939',
|
||||
'67332667ffc00b31', '8eb44a8768581511', 'db0c2e0d64f98fa7', '47b5481dbefa4fa4'
|
||||
);
|
||||
$init512 = array( // initial values for SHA512
|
||||
'6a09e667f3bcc908', 'bb67ae8584caa73b', '3c6ef372fe94f82b', 'a54ff53a5f1d36f1',
|
||||
'510e527fade682d1', '9b05688c2b3e6c1f', '1f83d9abfb41bd6b', '5be0cd19137e2179'
|
||||
);
|
||||
|
||||
for ($i = 0; $i < 8; $i++) {
|
||||
$init384[$i] = new Math_BigInteger($init384[$i], 16);
|
||||
$init384[$i]->setPrecision(64);
|
||||
$init512[$i] = new Math_BigInteger($init512[$i], 16);
|
||||
$init512[$i]->setPrecision(64);
|
||||
}
|
||||
|
||||
// Initialize table of round constants
|
||||
// (first 64 bits of the fractional parts of the cube roots of the first 80 primes 2..409)
|
||||
$k = array(
|
||||
'428a2f98d728ae22', '7137449123ef65cd', 'b5c0fbcfec4d3b2f', 'e9b5dba58189dbbc',
|
||||
'3956c25bf348b538', '59f111f1b605d019', '923f82a4af194f9b', 'ab1c5ed5da6d8118',
|
||||
'd807aa98a3030242', '12835b0145706fbe', '243185be4ee4b28c', '550c7dc3d5ffb4e2',
|
||||
'72be5d74f27b896f', '80deb1fe3b1696b1', '9bdc06a725c71235', 'c19bf174cf692694',
|
||||
'e49b69c19ef14ad2', 'efbe4786384f25e3', '0fc19dc68b8cd5b5', '240ca1cc77ac9c65',
|
||||
'2de92c6f592b0275', '4a7484aa6ea6e483', '5cb0a9dcbd41fbd4', '76f988da831153b5',
|
||||
'983e5152ee66dfab', 'a831c66d2db43210', 'b00327c898fb213f', 'bf597fc7beef0ee4',
|
||||
'c6e00bf33da88fc2', 'd5a79147930aa725', '06ca6351e003826f', '142929670a0e6e70',
|
||||
'27b70a8546d22ffc', '2e1b21385c26c926', '4d2c6dfc5ac42aed', '53380d139d95b3df',
|
||||
'650a73548baf63de', '766a0abb3c77b2a8', '81c2c92e47edaee6', '92722c851482353b',
|
||||
'a2bfe8a14cf10364', 'a81a664bbc423001', 'c24b8b70d0f89791', 'c76c51a30654be30',
|
||||
'd192e819d6ef5218', 'd69906245565a910', 'f40e35855771202a', '106aa07032bbd1b8',
|
||||
'19a4c116b8d2d0c8', '1e376c085141ab53', '2748774cdf8eeb99', '34b0bcb5e19b48a8',
|
||||
'391c0cb3c5c95a63', '4ed8aa4ae3418acb', '5b9cca4f7763e373', '682e6ff3d6b2b8a3',
|
||||
'748f82ee5defb2fc', '78a5636f43172f60', '84c87814a1f0ab72', '8cc702081a6439ec',
|
||||
'90befffa23631e28', 'a4506cebde82bde9', 'bef9a3f7b2c67915', 'c67178f2e372532b',
|
||||
'ca273eceea26619c', 'd186b8c721c0c207', 'eada7dd6cde0eb1e', 'f57d4f7fee6ed178',
|
||||
'06f067aa72176fba', '0a637dc5a2c898a6', '113f9804bef90dae', '1b710b35131c471b',
|
||||
'28db77f523047d84', '32caab7b40c72493', '3c9ebe0a15c9bebc', '431d67c49c100d4c',
|
||||
'4cc5d4becb3e42b6', '597f299cfc657e2a', '5fcb6fab3ad6faec', '6c44198c4a475817'
|
||||
);
|
||||
|
||||
for ($i = 0; $i < 80; $i++) {
|
||||
$k[$i] = new Math_BigInteger($k[$i], 16);
|
||||
}
|
||||
}
|
||||
|
||||
$hash = $this->l == 48 ? $init384 : $init512;
|
||||
|
||||
// Pre-processing
|
||||
$length = strlen($m);
|
||||
// to round to nearest 112 mod 128, we'll add 128 - (length + (128 - 112)) % 128
|
||||
$m.= str_repeat(chr(0), 128 - (($length + 16) & 0x7F));
|
||||
$m[$length] = chr(0x80);
|
||||
// we don't support hashing strings 512MB long
|
||||
$m.= pack('N4', 0, 0, 0, $length << 3);
|
||||
|
||||
// Process the message in successive 1024-bit chunks
|
||||
$chunks = str_split($m, 128);
|
||||
foreach ($chunks as $chunk) {
|
||||
$w = array();
|
||||
for ($i = 0; $i < 16; $i++) {
|
||||
$temp = new Math_BigInteger($this->_string_shift($chunk, 8), 256);
|
||||
$temp->setPrecision(64);
|
||||
$w[] = $temp;
|
||||
}
|
||||
|
||||
// Extend the sixteen 32-bit words into eighty 32-bit words
|
||||
for ($i = 16; $i < 80; $i++) {
|
||||
$temp = array(
|
||||
$w[$i - 15]->bitwise_rightRotate(1),
|
||||
$w[$i - 15]->bitwise_rightRotate(8),
|
||||
$w[$i - 15]->bitwise_rightShift(7)
|
||||
);
|
||||
$s0 = $temp[0]->bitwise_xor($temp[1]);
|
||||
$s0 = $s0->bitwise_xor($temp[2]);
|
||||
$temp = array(
|
||||
$w[$i - 2]->bitwise_rightRotate(19),
|
||||
$w[$i - 2]->bitwise_rightRotate(61),
|
||||
$w[$i - 2]->bitwise_rightShift(6)
|
||||
);
|
||||
$s1 = $temp[0]->bitwise_xor($temp[1]);
|
||||
$s1 = $s1->bitwise_xor($temp[2]);
|
||||
$w[$i] = $w[$i - 16]->copy();
|
||||
$w[$i] = $w[$i]->add($s0);
|
||||
$w[$i] = $w[$i]->add($w[$i - 7]);
|
||||
$w[$i] = $w[$i]->add($s1);
|
||||
}
|
||||
|
||||
// Initialize hash value for this chunk
|
||||
$a = $hash[0]->copy();
|
||||
$b = $hash[1]->copy();
|
||||
$c = $hash[2]->copy();
|
||||
$d = $hash[3]->copy();
|
||||
$e = $hash[4]->copy();
|
||||
$f = $hash[5]->copy();
|
||||
$g = $hash[6]->copy();
|
||||
$h = $hash[7]->copy();
|
||||
|
||||
// Main loop
|
||||
for ($i = 0; $i < 80; $i++) {
|
||||
$temp = array(
|
||||
$a->bitwise_rightRotate(28),
|
||||
$a->bitwise_rightRotate(34),
|
||||
$a->bitwise_rightRotate(39)
|
||||
);
|
||||
$s0 = $temp[0]->bitwise_xor($temp[1]);
|
||||
$s0 = $s0->bitwise_xor($temp[2]);
|
||||
$temp = array(
|
||||
$a->bitwise_and($b),
|
||||
$a->bitwise_and($c),
|
||||
$b->bitwise_and($c)
|
||||
);
|
||||
$maj = $temp[0]->bitwise_xor($temp[1]);
|
||||
$maj = $maj->bitwise_xor($temp[2]);
|
||||
$t2 = $s0->add($maj);
|
||||
|
||||
$temp = array(
|
||||
$e->bitwise_rightRotate(14),
|
||||
$e->bitwise_rightRotate(18),
|
||||
$e->bitwise_rightRotate(41)
|
||||
);
|
||||
$s1 = $temp[0]->bitwise_xor($temp[1]);
|
||||
$s1 = $s1->bitwise_xor($temp[2]);
|
||||
$temp = array(
|
||||
$e->bitwise_and($f),
|
||||
$g->bitwise_and($e->bitwise_not())
|
||||
);
|
||||
$ch = $temp[0]->bitwise_xor($temp[1]);
|
||||
$t1 = $h->add($s1);
|
||||
$t1 = $t1->add($ch);
|
||||
$t1 = $t1->add($k[$i]);
|
||||
$t1 = $t1->add($w[$i]);
|
||||
|
||||
$h = $g->copy();
|
||||
$g = $f->copy();
|
||||
$f = $e->copy();
|
||||
$e = $d->add($t1);
|
||||
$d = $c->copy();
|
||||
$c = $b->copy();
|
||||
$b = $a->copy();
|
||||
$a = $t1->add($t2);
|
||||
}
|
||||
|
||||
// Add this chunk's hash to result so far
|
||||
$hash = array(
|
||||
$hash[0]->add($a),
|
||||
$hash[1]->add($b),
|
||||
$hash[2]->add($c),
|
||||
$hash[3]->add($d),
|
||||
$hash[4]->add($e),
|
||||
$hash[5]->add($f),
|
||||
$hash[6]->add($g),
|
||||
$hash[7]->add($h)
|
||||
);
|
||||
}
|
||||
|
||||
// Produce the final hash value (big-endian)
|
||||
// (Crypt_Hash::hash() trims the output for hashes but not for HMACs. as such, we trim the output here)
|
||||
$temp = $hash[0]->toBytes() . $hash[1]->toBytes() . $hash[2]->toBytes() . $hash[3]->toBytes() .
|
||||
$hash[4]->toBytes() . $hash[5]->toBytes();
|
||||
if ($this->l != 48) {
|
||||
$temp.= $hash[6]->toBytes() . $hash[7]->toBytes();
|
||||
}
|
||||
|
||||
return $temp;
|
||||
}
|
||||
|
||||
/**
|
||||
* Right Rotate
|
||||
*
|
||||
* @access private
|
||||
* @param Integer $int
|
||||
* @param Integer $amt
|
||||
* @see _sha256()
|
||||
* @return Integer
|
||||
*/
|
||||
function _rightRotate($int, $amt)
|
||||
{
|
||||
$invamt = 32 - $amt;
|
||||
$mask = (1 << $invamt) - 1;
|
||||
return (($int << $invamt) & 0xFFFFFFFF) | (($int >> $amt) & $mask);
|
||||
}
|
||||
|
||||
/**
|
||||
* Right Shift
|
||||
*
|
||||
* @access private
|
||||
* @param Integer $int
|
||||
* @param Integer $amt
|
||||
* @see _sha256()
|
||||
* @return Integer
|
||||
*/
|
||||
function _rightShift($int, $amt)
|
||||
{
|
||||
$mask = (1 << (32 - $amt)) - 1;
|
||||
return ($int >> $amt) & $mask;
|
||||
}
|
||||
|
||||
/**
|
||||
* Not
|
||||
*
|
||||
* @access private
|
||||
* @param Integer $int
|
||||
* @see _sha256()
|
||||
* @return Integer
|
||||
*/
|
||||
function _not($int)
|
||||
{
|
||||
return ~$int & 0xFFFFFFFF;
|
||||
}
|
||||
|
||||
/**
|
||||
* Add
|
||||
*
|
||||
* _sha256() adds multiple unsigned 32-bit integers. Since PHP doesn't support unsigned integers and since the
|
||||
* possibility of overflow exists, care has to be taken. Math_BigInteger() could be used but this should be faster.
|
||||
*
|
||||
* @param String $string
|
||||
* @param optional Integer $index
|
||||
* @return String
|
||||
* @see _sha256()
|
||||
* @access private
|
||||
*/
|
||||
function _add()
|
||||
{
|
||||
static $mod;
|
||||
if (!isset($mod)) {
|
||||
$mod = pow(2, 32);
|
||||
}
|
||||
|
||||
$result = 0;
|
||||
$arguments = func_get_args();
|
||||
foreach ($arguments as $argument) {
|
||||
$result+= $argument < 0 ? ($argument & 0x7FFFFFFF) + 0x80000000 : $argument;
|
||||
}
|
||||
|
||||
return fmod($result, $mod);
|
||||
}
|
||||
|
||||
/**
|
||||
* String Shift
|
||||
*
|
||||
* Inspired by array_shift
|
||||
*
|
||||
* @param String $string
|
||||
* @param optional Integer $index
|
||||
* @return String
|
||||
* @access private
|
||||
*/
|
||||
function _string_shift(&$string, $index = 1)
|
||||
{
|
||||
$substr = substr($string, 0, $index);
|
||||
$string = substr($string, $index);
|
||||
return $substr;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,493 @@
|
|||
<?php
|
||||
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of RC4.
|
||||
*
|
||||
* Uses mcrypt, if available, and an internal implementation, otherwise.
|
||||
*
|
||||
* PHP versions 4 and 5
|
||||
*
|
||||
* Useful resources are as follows:
|
||||
*
|
||||
* - {@link http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt ARCFOUR Algorithm}
|
||||
* - {@link http://en.wikipedia.org/wiki/RC4 - Wikipedia: RC4}
|
||||
*
|
||||
* RC4 is also known as ARCFOUR or ARC4. The reason is elaborated upon at Wikipedia. This class is named RC4 and not
|
||||
* ARCFOUR or ARC4 because RC4 is how it is refered to in the SSH1 specification.
|
||||
*
|
||||
* Here's a short example of how to use this library:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Crypt/RC4.php');
|
||||
*
|
||||
* $rc4 = new Crypt_RC4();
|
||||
*
|
||||
* $rc4->setKey('abcdefgh');
|
||||
*
|
||||
* $size = 10 * 1024;
|
||||
* $plaintext = '';
|
||||
* for ($i = 0; $i < $size; $i++) {
|
||||
* $plaintext.= 'a';
|
||||
* }
|
||||
*
|
||||
* echo $rc4->decrypt($rc4->encrypt($plaintext));
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* LICENSE: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Crypt
|
||||
* @package Crypt_RC4
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id$
|
||||
* @link http://phpseclib.sourceforge.net
|
||||
*/
|
||||
|
||||
/**#@+
|
||||
* @access private
|
||||
* @see Crypt_RC4::Crypt_RC4()
|
||||
*/
|
||||
/**
|
||||
* Toggles the internal implementation
|
||||
*/
|
||||
define('CRYPT_RC4_MODE_INTERNAL', 1);
|
||||
/**
|
||||
* Toggles the mcrypt implementation
|
||||
*/
|
||||
define('CRYPT_RC4_MODE_MCRYPT', 2);
|
||||
/**#@-*/
|
||||
|
||||
/**#@+
|
||||
* @access private
|
||||
* @see Crypt_RC4::_crypt()
|
||||
*/
|
||||
define('CRYPT_RC4_ENCRYPT', 0);
|
||||
define('CRYPT_RC4_DECRYPT', 1);
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of RC4.
|
||||
*
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @version 0.1.0
|
||||
* @access public
|
||||
* @package Crypt_RC4
|
||||
*/
|
||||
class Crypt_RC4 {
|
||||
/**
|
||||
* The Key
|
||||
*
|
||||
* @see Crypt_RC4::setKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $key = "\0";
|
||||
|
||||
/**
|
||||
* The Key Stream for encryption
|
||||
*
|
||||
* If CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT, this will be equal to the mcrypt object
|
||||
*
|
||||
* @see Crypt_RC4::setKey()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $encryptStream = false;
|
||||
|
||||
/**
|
||||
* The Key Stream for decryption
|
||||
*
|
||||
* If CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT, this will be equal to the mcrypt object
|
||||
*
|
||||
* @see Crypt_RC4::setKey()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $decryptStream = false;
|
||||
|
||||
/**
|
||||
* The $i and $j indexes for encryption
|
||||
*
|
||||
* @see Crypt_RC4::_crypt()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $encryptIndex = 0;
|
||||
|
||||
/**
|
||||
* The $i and $j indexes for decryption
|
||||
*
|
||||
* @see Crypt_RC4::_crypt()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $decryptIndex = 0;
|
||||
|
||||
/**
|
||||
* MCrypt parameters
|
||||
*
|
||||
* @see Crypt_RC4::setMCrypt()
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $mcrypt = array('', '');
|
||||
|
||||
/**
|
||||
* The Encryption Algorithm
|
||||
*
|
||||
* Only used if CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT. Only possible values are MCRYPT_RC4 or MCRYPT_ARCFOUR.
|
||||
*
|
||||
* @see Crypt_RC4::Crypt_RC4()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $mode;
|
||||
|
||||
/**
|
||||
* Default Constructor.
|
||||
*
|
||||
* Determines whether or not the mcrypt extension should be used.
|
||||
*
|
||||
* @param optional Integer $mode
|
||||
* @return Crypt_RC4
|
||||
* @access public
|
||||
*/
|
||||
function Crypt_RC4()
|
||||
{
|
||||
if ( !defined('CRYPT_RC4_MODE') ) {
|
||||
switch (true) {
|
||||
case extension_loaded('mcrypt') && (defined('MCRYPT_ARCFOUR') || defined('MCRYPT_RC4')):
|
||||
// i'd check to see if rc4 was supported, by doing in_array('arcfour', mcrypt_list_algorithms('')),
|
||||
// but since that can be changed after the object has been created, there doesn't seem to be
|
||||
// a lot of point...
|
||||
define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_MCRYPT);
|
||||
break;
|
||||
default:
|
||||
define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_INTERNAL);
|
||||
}
|
||||
}
|
||||
|
||||
switch ( CRYPT_RC4_MODE ) {
|
||||
case CRYPT_RC4_MODE_MCRYPT:
|
||||
switch (true) {
|
||||
case defined('MCRYPT_ARCFOUR'):
|
||||
$this->mode = MCRYPT_ARCFOUR;
|
||||
break;
|
||||
case defined('MCRYPT_RC4');
|
||||
$this->mode = MCRYPT_RC4;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the key.
|
||||
*
|
||||
* Keys can be between 1 and 256 bytes long. If they are longer then 256 bytes, the first 256 bytes will
|
||||
* be used. If no key is explicitly set, it'll be assumed to be a single null byte.
|
||||
*
|
||||
* @access public
|
||||
* @param String $key
|
||||
*/
|
||||
function setKey($key)
|
||||
{
|
||||
$this->key = $key;
|
||||
|
||||
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
|
||||
return;
|
||||
}
|
||||
|
||||
$keyLength = strlen($key);
|
||||
$keyStream = array();
|
||||
for ($i = 0; $i < 256; $i++) {
|
||||
$keyStream[$i] = $i;
|
||||
}
|
||||
$j = 0;
|
||||
for ($i = 0; $i < 256; $i++) {
|
||||
$j = ($j + $keyStream[$i] + ord($key[$i % $keyLength])) & 255;
|
||||
$temp = $keyStream[$i];
|
||||
$keyStream[$i] = $keyStream[$j];
|
||||
$keyStream[$j] = $temp;
|
||||
}
|
||||
|
||||
$this->encryptIndex = $this->decryptIndex = array(0, 0);
|
||||
$this->encryptStream = $this->decryptStream = $keyStream;
|
||||
}
|
||||
|
||||
/**
|
||||
* Dummy function.
|
||||
*
|
||||
* Some protocols, such as WEP, prepend an "initialization vector" to the key, effectively creating a new key [1].
|
||||
* If you need to use an initialization vector in this manner, feel free to prepend it to the key, yourself, before
|
||||
* calling setKey().
|
||||
*
|
||||
* [1] WEP's initialization vectors (IV's) are used in a somewhat insecure way. Since, in that protocol,
|
||||
* the IV's are relatively easy to predict, an attack described by
|
||||
* {@link http://www.drizzle.com/~aboba/IEEE/rc4_ksaproc.pdf Scott Fluhrer, Itsik Mantin, and Adi Shamir}
|
||||
* can be used to quickly guess at the rest of the key. The following links elaborate:
|
||||
*
|
||||
* {@link http://www.rsa.com/rsalabs/node.asp?id=2009 http://www.rsa.com/rsalabs/node.asp?id=2009}
|
||||
* {@link http://en.wikipedia.org/wiki/Related_key_attack http://en.wikipedia.org/wiki/Related_key_attack}
|
||||
*
|
||||
* @param String $iv
|
||||
* @see Crypt_RC4::setKey()
|
||||
* @access public
|
||||
*/
|
||||
function setIV($iv)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets MCrypt parameters. (optional)
|
||||
*
|
||||
* If MCrypt is being used, empty strings will be used, unless otherwise specified.
|
||||
*
|
||||
* @link http://php.net/function.mcrypt-module-open#function.mcrypt-module-open
|
||||
* @access public
|
||||
* @param optional Integer $algorithm_directory
|
||||
* @param optional Integer $mode_directory
|
||||
*/
|
||||
function setMCrypt($algorithm_directory = '', $mode_directory = '')
|
||||
{
|
||||
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
|
||||
$this->mcrypt = array($algorithm_directory, $mode_directory);
|
||||
$this->_closeMCrypt();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Encrypts a message.
|
||||
*
|
||||
* @see Crypt_RC4::_crypt()
|
||||
* @access public
|
||||
* @param String $plaintext
|
||||
*/
|
||||
function encrypt($plaintext)
|
||||
{
|
||||
return $this->_crypt($plaintext, CRYPT_RC4_ENCRYPT);
|
||||
}
|
||||
|
||||
/**
|
||||
* Decrypts a message.
|
||||
*
|
||||
* $this->decrypt($this->encrypt($plaintext)) == $this->encrypt($this->encrypt($plaintext)).
|
||||
* Atleast if the continuous buffer is disabled.
|
||||
*
|
||||
* @see Crypt_RC4::_crypt()
|
||||
* @access public
|
||||
* @param String $ciphertext
|
||||
*/
|
||||
function decrypt($ciphertext)
|
||||
{
|
||||
return $this->_crypt($ciphertext, CRYPT_RC4_DECRYPT);
|
||||
}
|
||||
|
||||
/**
|
||||
* Encrypts or decrypts a message.
|
||||
*
|
||||
* @see Crypt_RC4::encrypt()
|
||||
* @see Crypt_RC4::decrypt()
|
||||
* @access private
|
||||
* @param String $text
|
||||
* @param Integer $mode
|
||||
*/
|
||||
function _crypt($text, $mode)
|
||||
{
|
||||
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
|
||||
$keyStream = $mode == CRYPT_RC4_ENCRYPT ? 'encryptStream' : 'decryptStream';
|
||||
|
||||
if ($this->$keyStream === false) {
|
||||
$this->$keyStream = mcrypt_module_open($this->mode, $this->mcrypt[0], MCRYPT_MODE_STREAM, $this->mcrypt[1]);
|
||||
mcrypt_generic_init($this->$keyStream, $this->key, '');
|
||||
} else if (!$this->continuousBuffer) {
|
||||
mcrypt_generic_init($this->$keyStream, $this->key, '');
|
||||
}
|
||||
$newText = mcrypt_generic($this->$keyStream, $text);
|
||||
if (!$this->continuousBuffer) {
|
||||
mcrypt_generic_deinit($this->$keyStream);
|
||||
}
|
||||
|
||||
return $newText;
|
||||
}
|
||||
|
||||
if ($this->encryptStream === false) {
|
||||
$this->setKey($this->key);
|
||||
}
|
||||
|
||||
switch ($mode) {
|
||||
case CRYPT_RC4_ENCRYPT:
|
||||
$keyStream = $this->encryptStream;
|
||||
list($i, $j) = $this->encryptIndex;
|
||||
break;
|
||||
case CRYPT_RC4_DECRYPT:
|
||||
$keyStream = $this->decryptStream;
|
||||
list($i, $j) = $this->decryptIndex;
|
||||
}
|
||||
|
||||
$newText = '';
|
||||
for ($k = 0; $k < strlen($text); $k++) {
|
||||
$i = ($i + 1) & 255;
|
||||
$j = ($j + $keyStream[$i]) & 255;
|
||||
$temp = $keyStream[$i];
|
||||
$keyStream[$i] = $keyStream[$j];
|
||||
$keyStream[$j] = $temp;
|
||||
$temp = $keyStream[($keyStream[$i] + $keyStream[$j]) & 255];
|
||||
$newText.= chr(ord($text[$k]) ^ $temp);
|
||||
}
|
||||
|
||||
if ($this->continuousBuffer) {
|
||||
switch ($mode) {
|
||||
case CRYPT_RC4_ENCRYPT:
|
||||
$this->encryptStream = $keyStream;
|
||||
$this->encryptIndex = array($i, $j);
|
||||
break;
|
||||
case CRYPT_RC4_DECRYPT:
|
||||
$this->decryptStream = $keyStream;
|
||||
$this->decryptIndex = array($i, $j);
|
||||
}
|
||||
}
|
||||
|
||||
return $newText;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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 $rc4->encrypt(substr($plaintext, 0, 8));
|
||||
* echo $rc4->encrypt(substr($plaintext, 8, 8));
|
||||
* </code>
|
||||
* <code>
|
||||
* echo $rc4->encrypt($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>
|
||||
* $rc4->encrypt(substr($plaintext, 0, 8));
|
||||
* echo $rc4->decrypt($des->encrypt(substr($plaintext, 8, 8)));
|
||||
* </code>
|
||||
* <code>
|
||||
* echo $rc4->decrypt($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_RC4::disableContinuousBuffer()
|
||||
* @access public
|
||||
*/
|
||||
function enableContinuousBuffer()
|
||||
{
|
||||
$this->continuousBuffer = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Treat consecutive packets as if they are a discontinuous buffer.
|
||||
*
|
||||
* The default behavior.
|
||||
*
|
||||
* @see Crypt_RC4::enableContinuousBuffer()
|
||||
* @access public
|
||||
*/
|
||||
function disableContinuousBuffer()
|
||||
{
|
||||
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_INTERNAL ) {
|
||||
$this->encryptIndex = $this->decryptIndex = array(0, 0);
|
||||
$this->setKey($this->key);
|
||||
}
|
||||
|
||||
$this->continuousBuffer = false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Dummy function.
|
||||
*
|
||||
* Since RC4 is a stream cipher and not a block cipher, no padding is necessary. The only reason this function is
|
||||
* included is so that you can switch between a block cipher and a stream cipher transparently.
|
||||
*
|
||||
* @see Crypt_RC4::disablePadding()
|
||||
* @access public
|
||||
*/
|
||||
function enablePadding()
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* Dummy function.
|
||||
*
|
||||
* @see Crypt_RC4::enablePadding()
|
||||
* @access public
|
||||
*/
|
||||
function disablePadding()
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* Class destructor.
|
||||
*
|
||||
* Will be called, automatically, if you're using PHP5. If you're using PHP4, call it yourself. Only really
|
||||
* needs to be called if mcrypt is being used.
|
||||
*
|
||||
* @access public
|
||||
*/
|
||||
function __destruct()
|
||||
{
|
||||
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
|
||||
$this->_closeMCrypt();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Properly close the MCrypt objects.
|
||||
*
|
||||
* @access prviate
|
||||
*/
|
||||
function _closeMCrypt()
|
||||
{
|
||||
if ( $this->encryptStream !== false ) {
|
||||
if ( $this->continuousBuffer ) {
|
||||
mcrypt_generic_deinit($this->encryptStream);
|
||||
}
|
||||
|
||||
mcrypt_module_close($this->encryptStream);
|
||||
|
||||
$this->encryptStream = false;
|
||||
}
|
||||
|
||||
if ( $this->decryptStream !== false ) {
|
||||
if ( $this->continuousBuffer ) {
|
||||
mcrypt_generic_deinit($this->decryptStream);
|
||||
}
|
||||
|
||||
mcrypt_module_close($this->decryptStream);
|
||||
|
||||
$this->decryptStream = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,130 @@
|
|||
<?php
|
||||
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
||||
|
||||
/**
|
||||
* Random Number Generator
|
||||
*
|
||||
* PHP versions 4 and 5
|
||||
*
|
||||
* Here's a short example of how to use this library:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Crypt/Random.php');
|
||||
*
|
||||
* echo crypt_random();
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* LICENSE: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Crypt
|
||||
* @package Crypt_Random
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id$
|
||||
* @link http://phpseclib.sourceforge.net
|
||||
*/
|
||||
|
||||
/**
|
||||
* Generate a random value.
|
||||
*
|
||||
* On 32-bit machines, the largest distance that can exist between $min and $max is 2**31.
|
||||
* If $min and $max are farther apart than that then the last ($max - range) numbers.
|
||||
*
|
||||
* Depending on how this is being used, it may be worth while to write a replacement. For example,
|
||||
* a PHP-based web app that stores its data in an SQL database can collect more entropy than this function
|
||||
* can.
|
||||
*
|
||||
* @param optional Integer $min
|
||||
* @param optional Integer $max
|
||||
* @return Integer
|
||||
* @access public
|
||||
*/
|
||||
function crypt_random($min = 0, $max = 0x7FFFFFFF)
|
||||
{
|
||||
if ($min == $max) {
|
||||
return $min;
|
||||
}
|
||||
|
||||
// see http://en.wikipedia.org/wiki//dev/random
|
||||
// if open_basedir is enabled file_exists() will ouput an "open_basedir restriction in effect" warning,
|
||||
// so we suppress it.
|
||||
if (@file_exists('/dev/urandom')) {
|
||||
static $fp;
|
||||
if (!$fp) {
|
||||
$fp = fopen('/dev/urandom', 'rb');
|
||||
}
|
||||
extract(unpack('Nrandom', fread($fp, 4)));
|
||||
|
||||
// say $min = 0 and $max = 3. if we didn't do abs() then we could have stuff like this:
|
||||
// -4 % 3 + 0 = -1, even though -1 < $min
|
||||
return abs($random) % ($max - $min) + $min;
|
||||
}
|
||||
|
||||
/* Prior to PHP 4.2.0, mt_srand() had to be called before mt_rand() could be called.
|
||||
Prior to PHP 5.2.6, mt_rand()'s automatic seeding was subpar, as elaborated here:
|
||||
|
||||
http://www.suspekt.org/2008/08/17/mt_srand-and-not-so-random-numbers/
|
||||
|
||||
The seeding routine is pretty much ripped from PHP's own internal GENERATE_SEED() macro:
|
||||
|
||||
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3_2/ext/standard/php_rand.h?view=markup */
|
||||
if (version_compare(PHP_VERSION, '5.2.5', '<=')) {
|
||||
static $seeded;
|
||||
if (!isset($seeded)) {
|
||||
$seeded = true;
|
||||
mt_srand(fmod(time() * getmypid(), 0x7FFFFFFF) ^ fmod(1000000 * lcg_value(), 0x7FFFFFFF));
|
||||
}
|
||||
}
|
||||
|
||||
static $crypto;
|
||||
|
||||
// The CSPRNG's Yarrow and Fortuna periodically reseed. This function can be reseeded by hitting F5
|
||||
// in the browser and reloading the page.
|
||||
|
||||
if (!isset($crypto)) {
|
||||
$key = $iv = '';
|
||||
for ($i = 0; $i < 8; $i++) {
|
||||
$key.= pack('n', mt_rand(0, 0xFFFF));
|
||||
$iv .= pack('n', mt_rand(0, 0xFFFF));
|
||||
}
|
||||
switch (true) {
|
||||
case class_exists('Crypt_AES'):
|
||||
$crypto = new Crypt_AES(CRYPT_AES_MODE_CTR);
|
||||
break;
|
||||
case class_exists('Crypt_TripleDES'):
|
||||
$crypto = new Crypt_TripleDES(CRYPT_DES_MODE_CTR);
|
||||
break;
|
||||
case class_exists('Crypt_DES'):
|
||||
$crypto = new Crypt_DES(CRYPT_DES_MODE_CTR);
|
||||
break;
|
||||
case class_exists('Crypt_RC4'):
|
||||
$crypto = new Crypt_RC4();
|
||||
break;
|
||||
default:
|
||||
extract(unpack('Nrandom', pack('H*', sha1(mt_rand(0, 0x7FFFFFFF)))));
|
||||
return abs($random) % ($max - $min) + $min;
|
||||
}
|
||||
$crypto->setKey($key);
|
||||
$crypto->setIV($iv);
|
||||
$crypto->enableContinuousBuffer();
|
||||
}
|
||||
|
||||
extract(unpack('Nrandom', $crypto->encrypt("\0\0\0\0")));
|
||||
return abs($random) % ($max - $min) + $min;
|
||||
}
|
||||
?>
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,690 @@
|
|||
<?php
|
||||
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of Triple DES.
|
||||
*
|
||||
* Uses mcrypt, if available, and an internal implementation, otherwise. Operates in the EDE3 mode (encrypt-decrypt-encrypt).
|
||||
*
|
||||
* PHP versions 4 and 5
|
||||
*
|
||||
* Here's a short example of how to use this library:
|
||||
* <code>
|
||||
* <?php
|
||||
* include('Crypt/TripleDES.php');
|
||||
*
|
||||
* $des = new Crypt_TripleDES();
|
||||
*
|
||||
* $des->setKey('abcdefghijklmnopqrstuvwx');
|
||||
*
|
||||
* $size = 10 * 1024;
|
||||
* $plaintext = '';
|
||||
* for ($i = 0; $i < $size; $i++) {
|
||||
* $plaintext.= 'a';
|
||||
* }
|
||||
*
|
||||
* echo $des->decrypt($des->encrypt($plaintext));
|
||||
* ?>
|
||||
* </code>
|
||||
*
|
||||
* LICENSE: This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*
|
||||
* @category Crypt
|
||||
* @package Crypt_TripleDES
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @copyright MMVII Jim Wigginton
|
||||
* @license http://www.gnu.org/licenses/lgpl.txt
|
||||
* @version $Id$
|
||||
* @link http://phpseclib.sourceforge.net
|
||||
*/
|
||||
|
||||
/**
|
||||
* Include Crypt_DES
|
||||
*/
|
||||
require_once 'DES.php';
|
||||
|
||||
/**
|
||||
* Encrypt / decrypt using inner chaining
|
||||
*
|
||||
* Inner chaining is used by SSH-1 and is generally considered to be less secure then outer chaining (CRYPT_DES_MODE_CBC3).
|
||||
*/
|
||||
define('CRYPT_DES_MODE_3CBC', 3);
|
||||
|
||||
/**
|
||||
* Encrypt / decrypt using outer chaining
|
||||
*
|
||||
* Outer chaining is used by SSH-2 and when the mode is set to CRYPT_DES_MODE_CBC.
|
||||
*/
|
||||
define('CRYPT_DES_MODE_CBC3', CRYPT_DES_MODE_CBC);
|
||||
|
||||
/**
|
||||
* Pure-PHP implementation of Triple DES.
|
||||
*
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @version 0.1.0
|
||||
* @access public
|
||||
* @package Crypt_TerraDES
|
||||
*/
|
||||
class Crypt_TripleDES {
|
||||
/**
|
||||
* The Three Keys
|
||||
*
|
||||
* @see Crypt_TripleDES::setKey()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $key = "\0\0\0\0\0\0\0\0";
|
||||
|
||||
/**
|
||||
* The Encryption Mode
|
||||
*
|
||||
* @see Crypt_TripleDES::Crypt_TripleDES()
|
||||
* @var Integer
|
||||
* @access private
|
||||
*/
|
||||
var $mode = CRYPT_DES_MODE_CBC;
|
||||
|
||||
/**
|
||||
* Continuous Buffer status
|
||||
*
|
||||
* @see Crypt_TripleDES::enableContinuousBuffer()
|
||||
* @var Boolean
|
||||
* @access private
|
||||
*/
|
||||
var $continuousBuffer = false;
|
||||
|
||||
/**
|
||||
* Padding status
|
||||
*
|
||||
* @see Crypt_TripleDES::enablePadding()
|
||||
* @var Boolean
|
||||
* @access private
|
||||
*/
|
||||
var $padding = true;
|
||||
|
||||
/**
|
||||
* The Initialization Vector
|
||||
*
|
||||
* @see Crypt_TripleDES::setIV()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $iv = "\0\0\0\0\0\0\0\0";
|
||||
|
||||
/**
|
||||
* A "sliding" Initialization Vector
|
||||
*
|
||||
* @see Crypt_TripleDES::enableContinuousBuffer()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $encryptIV = "\0\0\0\0\0\0\0\0";
|
||||
|
||||
/**
|
||||
* A "sliding" Initialization Vector
|
||||
*
|
||||
* @see Crypt_TripleDES::enableContinuousBuffer()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $decryptIV = "\0\0\0\0\0\0\0\0";
|
||||
|
||||
/**
|
||||
* The Crypt_DES objects
|
||||
*
|
||||
* @var Array
|
||||
* @access private
|
||||
*/
|
||||
var $des;
|
||||
|
||||
/**
|
||||
* 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_AES::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_AES::decrypt()
|
||||
* @var String
|
||||
* @access private
|
||||
*/
|
||||
var $demcrypt;
|
||||
|
||||
/**
|
||||
* Does the (en|de)mcrypt resource need to be (re)initialized?
|
||||
*
|
||||
* @see setKey()
|
||||
* @see setIV()
|
||||
* @var Boolean
|
||||
* @access private
|
||||
*/
|
||||
var $changed = true;
|
||||
|
||||
/**
|
||||
* 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 $mode
|
||||
* @return Crypt_TripleDES
|
||||
* @access public
|
||||
*/
|
||||
function Crypt_TripleDES($mode = CRYPT_DES_MODE_CBC)
|
||||
{
|
||||
if ( !defined('CRYPT_DES_MODE') ) {
|
||||
switch (true) {
|
||||
case extension_loaded('mcrypt'):
|
||||
// i'd check to see if des was supported, by doing in_array('des', mcrypt_list_algorithms('')),
|
||||
// but since that can be changed after the object has been created, there doesn't seem to be
|
||||
// a lot of point...
|
||||
define('CRYPT_DES_MODE', CRYPT_DES_MODE_MCRYPT);
|
||||
break;
|
||||
default:
|
||||
define('CRYPT_DES_MODE', CRYPT_DES_MODE_INTERNAL);
|
||||
}
|
||||
}
|
||||
|
||||
if ( $mode == CRYPT_DES_MODE_3CBC ) {
|
||||
$this->mode = CRYPT_DES_MODE_3CBC;
|
||||
$this->des = array(
|
||||
new Crypt_DES(CRYPT_DES_MODE_CBC),
|
||||
new Crypt_DES(CRYPT_DES_MODE_CBC),
|
||||
new Crypt_DES(CRYPT_DES_MODE_CBC)
|
||||
);
|
||||
|
||||
// we're going to be doing the padding, ourselves, so disable it in the Crypt_DES objects
|
||||
$this->des[0]->disablePadding();
|
||||
$this->des[1]->disablePadding();
|
||||
$this->des[2]->disablePadding();
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
switch ( CRYPT_DES_MODE ) {
|
||||
case CRYPT_DES_MODE_MCRYPT:
|
||||
switch ($mode) {
|
||||
case CRYPT_DES_MODE_ECB:
|
||||
$this->mode = MCRYPT_MODE_ECB;
|
||||
break;
|
||||
case CRYPT_DES_MODE_CTR:
|
||||
$this->mode = 'ctr';
|
||||
break;
|
||||
case CRYPT_DES_MODE_CBC:
|
||||
default:
|
||||
$this->mode = MCRYPT_MODE_CBC;
|
||||
}
|
||||
|
||||
break;
|
||||
default:
|
||||
$this->des = array(
|
||||
new Crypt_DES(CRYPT_DES_MODE_ECB),
|
||||
new Crypt_DES(CRYPT_DES_MODE_ECB),
|
||||
new Crypt_DES(CRYPT_DES_MODE_ECB)
|
||||
);
|
||||
|
||||
// we're going to be doing the padding, ourselves, so disable it in the Crypt_DES objects
|
||||
$this->des[0]->disablePadding();
|
||||
$this->des[1]->disablePadding();
|
||||
$this->des[2]->disablePadding();
|
||||
|
||||
switch ($mode) {
|
||||
case CRYPT_DES_MODE_ECB:
|
||||
case CRYPT_DES_MODE_CTR:
|
||||
case CRYPT_DES_MODE_CBC:
|
||||
$this->mode = $mode;
|
||||
break;
|
||||
default:
|
||||
$this->mode = CRYPT_DES_MODE_CBC;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the key.
|
||||
*
|
||||
* Keys can be of any length. Triple DES, itself, can use 128-bit (eg. strlen($key) == 16) or
|
||||
* 192-bit (eg. strlen($key) == 24) keys. This function pads and truncates $key as appropriate.
|
||||
*
|
||||
* 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)
|
||||
{
|
||||
$length = strlen($key);
|
||||
if ($length > 8) {
|
||||
$key = str_pad($key, 24, chr(0));
|
||||
// if $key is between 64 and 128-bits, use the first 64-bits as the last, per this:
|
||||
// http://php.net/function.mcrypt-encrypt#47973
|
||||
//$key = $length <= 16 ? substr_replace($key, substr($key, 0, 8), 16) : substr($key, 0, 24);
|
||||
}
|
||||
$this->key = $key;
|
||||
switch (true) {
|
||||
case CRYPT_DES_MODE == CRYPT_DES_MODE_INTERNAL:
|
||||
case $this->mode == CRYPT_DES_MODE_3CBC:
|
||||
$this->des[0]->setKey(substr($key, 0, 8));
|
||||
$this->des[1]->setKey(substr($key, 8, 8));
|
||||
$this->des[2]->setKey(substr($key, 16, 8));
|
||||
}
|
||||
$this->changed = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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));
|
||||
if ($this->mode == CRYPT_DES_MODE_3CBC) {
|
||||
$this->des[0]->setIV($iv);
|
||||
$this->des[1]->setIV($iv);
|
||||
$this->des[2]->setIV($iv);
|
||||
}
|
||||
$this->changed = 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 Integer $length
|
||||
* @param String $iv
|
||||
*/
|
||||
function _generate_xor($length, &$iv)
|
||||
{
|
||||
$xor = '';
|
||||
$num_blocks = ($length + 7) >> 3;
|
||||
for ($i = 0; $i < $num_blocks; $i++) {
|
||||
$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.
|
||||
*
|
||||
* @access public
|
||||
* @param String $plaintext
|
||||
*/
|
||||
function encrypt($plaintext)
|
||||
{
|
||||
if ($this->mode != CRYPT_DES_MODE_CTR && $this->mode != 'ctr') {
|
||||
$plaintext = $this->_pad($plaintext);
|
||||
}
|
||||
|
||||
// if the key is smaller then 8, do what we'd normally do
|
||||
if ($this->mode == CRYPT_DES_MODE_3CBC && strlen($this->key) > 8) {
|
||||
$ciphertext = $this->des[2]->encrypt($this->des[1]->decrypt($this->des[0]->encrypt($plaintext)));
|
||||
|
||||
return $ciphertext;
|
||||
}
|
||||
|
||||
if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {
|
||||
if ($this->changed) {
|
||||
if (!isset($this->enmcrypt)) {
|
||||
$this->enmcrypt = mcrypt_module_open(MCRYPT_3DES, '', $this->mode, '');
|
||||
}
|
||||
mcrypt_generic_init($this->enmcrypt, $this->key, $this->encryptIV);
|
||||
$this->changed = false;
|
||||
}
|
||||
|
||||
$ciphertext = mcrypt_generic($this->enmcrypt, $plaintext);
|
||||
|
||||
if (!$this->continuousBuffer) {
|
||||
mcrypt_generic_init($this->enmcrypt, $this->key, $this->encryptIV);
|
||||
}
|
||||
|
||||
return $ciphertext;
|
||||
}
|
||||
|
||||
if (strlen($this->key) <= 8) {
|
||||
$this->des[0]->mode = $this->mode;
|
||||
|
||||
return $this->des[0]->encrypt($plaintext);
|
||||
}
|
||||
|
||||
// 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."
|
||||
$plaintext = str_pad($plaintext, ceil(strlen($plaintext) / 8) * 8, chr(0));
|
||||
|
||||
$des = $this->des;
|
||||
|
||||
$ciphertext = '';
|
||||
switch ($this->mode) {
|
||||
case CRYPT_DES_MODE_ECB:
|
||||
for ($i = 0; $i < strlen($plaintext); $i+=8) {
|
||||
$block = substr($plaintext, $i, 8);
|
||||
$block = $des[0]->_processBlock($block, CRYPT_DES_ENCRYPT);
|
||||
$block = $des[1]->_processBlock($block, CRYPT_DES_DECRYPT);
|
||||
$block = $des[2]->_processBlock($block, CRYPT_DES_ENCRYPT);
|
||||
$ciphertext.= $block;
|
||||
}
|
||||
break;
|
||||
case CRYPT_DES_MODE_CBC:
|
||||
$xor = $this->encryptIV;
|
||||
for ($i = 0; $i < strlen($plaintext); $i+=8) {
|
||||
$block = substr($plaintext, $i, 8) ^ $xor;
|
||||
$block = $des[0]->_processBlock($block, CRYPT_DES_ENCRYPT);
|
||||
$block = $des[1]->_processBlock($block, CRYPT_DES_DECRYPT);
|
||||
$block = $des[2]->_processBlock($block, CRYPT_DES_ENCRYPT);
|
||||
$xor = $block;
|
||||
$ciphertext.= $block;
|
||||
}
|
||||
if ($this->continuousBuffer) {
|
||||
$this->encryptIV = $xor;
|
||||
}
|
||||
break;
|
||||
case CRYPT_DES_MODE_CTR:
|
||||
$xor = $this->encryptIV;
|
||||
for ($i = 0; $i < strlen($plaintext); $i+=8) {
|
||||
$key = $this->_generate_xor(8, $xor);
|
||||
$key = $des[0]->_processBlock($key, CRYPT_DES_ENCRYPT);
|
||||
$key = $des[1]->_processBlock($key, CRYPT_DES_DECRYPT);
|
||||
$key = $des[2]->_processBlock($key, CRYPT_DES_ENCRYPT);
|
||||
$block = substr($plaintext, $i, 8);
|
||||
$ciphertext.= $block ^ $key;
|
||||
}
|
||||
if ($this->continuousBuffer) {
|
||||
$this->encryptIV = $xor;
|
||||
}
|
||||
}
|
||||
|
||||
return $ciphertext;
|
||||
}
|
||||
|
||||
/**
|
||||
* Decrypts a message.
|
||||
*
|
||||
* @access public
|
||||
* @param String $ciphertext
|
||||
*/
|
||||
function decrypt($ciphertext)
|
||||
{
|
||||
if ($this->mode == CRYPT_DES_MODE_3CBC && strlen($this->key) > 8) {
|
||||
$plaintext = $this->des[0]->decrypt($this->des[1]->encrypt($this->des[2]->decrypt($ciphertext)));
|
||||
|
||||
return $this->_unpad($plaintext);
|
||||
}
|
||||
|
||||
// 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->changed) {
|
||||
if (!isset($this->demcrypt)) {
|
||||
$this->demcrypt = mcrypt_module_open(MCRYPT_3DES, '', $this->mode, '');
|
||||
}
|
||||
mcrypt_generic_init($this->demcrypt, $this->key, $this->decryptIV);
|
||||
$this->changed = false;
|
||||
}
|
||||
|
||||
$plaintext = mdecrypt_generic($this->demcrypt, $ciphertext);
|
||||
|
||||
if (!$this->continuousBuffer) {
|
||||
mcrypt_generic_init($this->demcrypt, $this->key, $this->decryptIV);
|
||||
}
|
||||
|
||||
return $this->mode != 'ctr' ? $this->_unpad($plaintext) : $plaintext;
|
||||
}
|
||||
|
||||
if (strlen($this->key) <= 8) {
|
||||
$this->des[0]->mode = $this->mode;
|
||||
|
||||
return $this->_unpad($this->des[0]->decrypt($plaintext));
|
||||
}
|
||||
|
||||
$des = $this->des;
|
||||
|
||||
$plaintext = '';
|
||||
switch ($this->mode) {
|
||||
case CRYPT_DES_MODE_ECB:
|
||||
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
|
||||
$block = substr($ciphertext, $i, 8);
|
||||
$block = $des[2]->_processBlock($block, CRYPT_DES_DECRYPT);
|
||||
$block = $des[1]->_processBlock($block, CRYPT_DES_ENCRYPT);
|
||||
$block = $des[0]->_processBlock($block, CRYPT_DES_DECRYPT);
|
||||
$plaintext.= $block;
|
||||
}
|
||||
break;
|
||||
case CRYPT_DES_MODE_CBC:
|
||||
$xor = $this->decryptIV;
|
||||
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
|
||||
$orig = $block = substr($ciphertext, $i, 8);
|
||||
$block = $des[2]->_processBlock($block, CRYPT_DES_DECRYPT);
|
||||
$block = $des[1]->_processBlock($block, CRYPT_DES_ENCRYPT);
|
||||
$block = $des[0]->_processBlock($block, CRYPT_DES_DECRYPT);
|
||||
$plaintext.= $block ^ $xor;
|
||||
$xor = $orig;
|
||||
}
|
||||
if ($this->continuousBuffer) {
|
||||
$this->decryptIV = $xor;
|
||||
}
|
||||
break;
|
||||
case CRYPT_DES_MODE_CTR:
|
||||
$xor = $this->decryptIV;
|
||||
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
|
||||
$key = $this->_generate_xor(8, $xor);
|
||||
$key = $des[0]->_processBlock($key, CRYPT_DES_ENCRYPT);
|
||||
$key = $des[1]->_processBlock($key, CRYPT_DES_DECRYPT);
|
||||
$key = $des[2]->_processBlock($key, CRYPT_DES_ENCRYPT);
|
||||
$block = substr($ciphertext, $i, 8);
|
||||
$plaintext.= $block ^ $key;
|
||||
}
|
||||
if ($this->continuousBuffer) {
|
||||
$this->decryptIV = $xor;
|
||||
}
|
||||
}
|
||||
|
||||
return $this->mode != CRYPT_DES_MODE_CTR ? $this->_unpad($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_TripleDES::disableContinuousBuffer()
|
||||
* @access public
|
||||
*/
|
||||
function enableContinuousBuffer()
|
||||
{
|
||||
$this->continuousBuffer = true;
|
||||
if ($this->mode == CRYPT_DES_MODE_3CBC) {
|
||||
$this->des[0]->enableContinuousBuffer();
|
||||
$this->des[1]->enableContinuousBuffer();
|
||||
$this->des[2]->enableContinuousBuffer();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Treat consecutive packets as if they are a discontinuous buffer.
|
||||
*
|
||||
* The default behavior.
|
||||
*
|
||||
* @see Crypt_TripleDES::enableContinuousBuffer()
|
||||
* @access public
|
||||
*/
|
||||
function disableContinuousBuffer()
|
||||
{
|
||||
$this->continuousBuffer = false;
|
||||
$this->encryptIV = $this->iv;
|
||||
$this->decryptIV = $this->iv;
|
||||
|
||||
if ($this->mode == CRYPT_DES_MODE_3CBC) {
|
||||
$this->des[0]->disableContinuousBuffer();
|
||||
$this->des[1]->disableContinuousBuffer();
|
||||
$this->des[2]->disableContinuousBuffer();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 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_TripleDES::disablePadding()
|
||||
* @access public
|
||||
*/
|
||||
function enablePadding()
|
||||
{
|
||||
$this->padding = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Do not pad packets.
|
||||
*
|
||||
* @see Crypt_TripleDES::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 $text is not a multiple of the blocksize, the string will be padded regardless
|
||||
* and padding will, hence forth, be enabled.
|
||||
*
|
||||
* @see Crypt_TripleDES::_unpad()
|
||||
* @access private
|
||||
*/
|
||||
function _pad($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)", E_USER_NOTICE);
|
||||
$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_TripleDES::_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);
|
||||
}
|
||||
}
|
||||
|
||||
// vim: ts=4:sw=4:et:
|
||||
// vim6: fdl=1:
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,43 @@
|
|||
<?php
|
||||
// $Id$
|
||||
|
||||
|
||||
/**
|
||||
* Replace array_fill()
|
||||
*
|
||||
* @category PHP
|
||||
* @package PHP_Compat
|
||||
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
|
||||
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
|
||||
* @link http://php.net/function.array_fill
|
||||
* @author Jim Wigginton <terrafrost@php.net>
|
||||
* @version $Revision$
|
||||
* @since PHP 4.2.0
|
||||
*/
|
||||
function php_compat_array_fill($start_index, $num, $value)
|
||||
{
|
||||
if ($num <= 0) {
|
||||
user_error('array_fill(): Number of elements must be positive', E_USER_WARNING);
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
$temp = array();
|
||||
|
||||
$end_index = $start_index + $num;
|
||||
for ($i = (int) $start_index; $i < $end_index; $i++) {
|
||||
$temp[$i] = $value;
|
||||
}
|
||||
|
||||
return $temp;
|
||||
}
|
||||
|
||||
// Define
|
||||
if (!function_exists('array_fill')) {
|
||||
function array_fill($start_index, $num, $value)
|
||||
{
|
||||
return php_compat_array_fill($start_index, $num, $value);
|
||||
}
|
||||
}
|
||||
|
||||
?>
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
<?php
|
||||
// $Id$
|
||||
|
||||
|
||||
/**
|
||||
* Replace bcpowmod()
|
||||
*
|
||||
* @category PHP
|
||||
* @package PHP_Compat
|
||||
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
|
||||
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
|
||||
* @link http://php.net/function.bcpowmod
|
||||
* @author Sara Golemon <pollita@php.net>
|
||||
* @version $Revision$
|
||||
* @since PHP 5.0.0
|
||||
* @require PHP 4.0.0 (user_error)
|
||||
*/
|
||||
function php_compat_bcpowmod($x, $y, $modulus, $scale = 0)
|
||||
{
|
||||
// Sanity check
|
||||
if (!is_scalar($x)) {
|
||||
user_error('bcpowmod() expects parameter 1 to be string, ' .
|
||||
gettype($x) . ' given', E_USER_WARNING);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!is_scalar($y)) {
|
||||
user_error('bcpowmod() expects parameter 2 to be string, ' .
|
||||
gettype($y) . ' given', E_USER_WARNING);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!is_scalar($modulus)) {
|
||||
user_error('bcpowmod() expects parameter 3 to be string, ' .
|
||||
gettype($modulus) . ' given', E_USER_WARNING);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!is_scalar($scale)) {
|
||||
user_error('bcpowmod() expects parameter 4 to be integer, ' .
|
||||
gettype($scale) . ' given', E_USER_WARNING);
|
||||
return false;
|
||||
}
|
||||
|
||||
$t = '1';
|
||||
while (bccomp($y, '0')) {
|
||||
if (bccomp(bcmod($y, '2'), '0')) {
|
||||
$t = bcmod(bcmul($t, $x), $modulus);
|
||||
$y = bcsub($y, '1');
|
||||
}
|
||||
|
||||
$x = bcmod(bcmul($x, $x), $modulus);
|
||||
$y = bcdiv($y, '2');
|
||||
}
|
||||
|
||||
return $t;
|
||||
}
|
||||
|
||||
|
||||
// Define
|
||||
if (!function_exists('bcpowmod')) {
|
||||
function bcpowmod($x, $y, $modulus, $scale = 0)
|
||||
{
|
||||
return php_compat_bcpowmod($x, $y, $modulus, $scale);
|
||||
}
|
||||
}
|
||||
?>
|
||||
|
|
@ -0,0 +1,59 @@
|
|||
<?php
|
||||
/**
|
||||
* Replace str_split()
|
||||
*
|
||||
* @category PHP
|
||||
* @package PHP_Compat
|
||||
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
|
||||
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
|
||||
* @link http://php.net/function.str_split
|
||||
* @author Aidan Lister <aidan@php.net>
|
||||
* @version $Revision$
|
||||
* @since PHP 5
|
||||
* @require PHP 4.0.0 (user_error)
|
||||
*/
|
||||
function php_compat_str_split($string, $split_length = 1)
|
||||
{
|
||||
if (!is_scalar($split_length)) {
|
||||
user_error('str_split() expects parameter 2 to be long, ' .
|
||||
gettype($split_length) . ' given', E_USER_WARNING);
|
||||
return false;
|
||||
}
|
||||
|
||||
$split_length = (int) $split_length;
|
||||
if ($split_length < 1) {
|
||||
user_error('str_split() The length of each segment must be greater than zero', E_USER_WARNING);
|
||||
return false;
|
||||
}
|
||||
|
||||
// Select split method
|
||||
if ($split_length < 65536) {
|
||||
// Faster, but only works for less than 2^16
|
||||
preg_match_all('/.{1,' . $split_length . '}/s', $string, $matches);
|
||||
return $matches[0];
|
||||
} else {
|
||||
// Required due to preg limitations
|
||||
$arr = array();
|
||||
$idx = 0;
|
||||
$pos = 0;
|
||||
$len = strlen($string);
|
||||
|
||||
while ($len > 0) {
|
||||
$blk = ($len < $split_length) ? $len : $split_length;
|
||||
$arr[$idx++] = substr($string, $pos, $blk);
|
||||
$pos += $blk;
|
||||
$len -= $blk;
|
||||
}
|
||||
|
||||
return $arr;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Define
|
||||
if (!function_exists('str_split')) {
|
||||
function str_split($string, $split_length = 1)
|
||||
{
|
||||
return php_compat_str_split($string, $split_length);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue