842 lines
28 KiB
PHP
842 lines
28 KiB
PHP
<?php
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/**
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* Pure-PHP implementations of keyed-hash message authentication codes (HMACs) and various cryptographic hashing functions.
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*
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* Uses hash() or mhash() if available and an internal implementation, otherwise. Currently supports the following:
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*
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* md2, md5, md5-96, sha1, sha1-96, sha256, sha256-96, sha384, and sha512, sha512-96
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*
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* If {@link Crypt_Hash::setKey() setKey()} is called, {@link Crypt_Hash::hash() hash()} will return the HMAC as opposed to
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* the hash. If no valid algorithm is provided, sha1 will be used.
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*
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* PHP versions 4 and 5
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*
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* {@internal The variable names are the same as those in
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* {@link http://tools.ietf.org/html/rfc2104#section-2 RFC2104}.}}
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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/Hash.php';
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*
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* $hash = new Crypt_Hash('sha1');
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*
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* $hash->setKey('abcdefg');
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*
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* echo base64_encode($hash->hash('abcdefg'));
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* ?>
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* </code>
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*
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* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @category Crypt
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* @package Crypt_Hash
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright 2007 Jim Wigginton
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link http://phpseclib.sourceforge.net
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*/
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/**#@+
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* @access private
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* @see Crypt_Hash::Crypt_Hash()
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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_HASH_MODE_INTERNAL', 1);
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/**
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* Toggles the mhash() implementation, which has been deprecated on PHP 5.3.0+.
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*/
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define('CRYPT_HASH_MODE_MHASH', 2);
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/**
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* Toggles the hash() implementation, which works on PHP 5.1.2+.
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*/
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define('CRYPT_HASH_MODE_HASH', 3);
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/**#@-*/
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/**
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* Pure-PHP implementations of keyed-hash message authentication codes (HMACs) and various cryptographic hashing functions.
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*
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* @package Crypt_Hash
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* @author Jim Wigginton <terrafrost@php.net>
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* @access public
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*/
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class Crypt_Hash
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{
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/**
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* Hash Parameter
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*
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* @see Crypt_Hash::setHash()
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* @var Integer
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* @access private
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*/
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var $hashParam;
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/**
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* Byte-length of compression blocks / key (Internal HMAC)
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*
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* @see Crypt_Hash::setAlgorithm()
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* @var Integer
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* @access private
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*/
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var $b;
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/**
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* Byte-length of hash output (Internal HMAC)
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*
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* @see Crypt_Hash::setHash()
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* @var Integer
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* @access private
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*/
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var $l = false;
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/**
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* Hash Algorithm
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*
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* @see Crypt_Hash::setHash()
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* @var String
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* @access private
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*/
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var $hash;
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/**
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* Key
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*
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* @see Crypt_Hash::setKey()
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* @var String
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* @access private
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*/
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var $key = false;
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/**
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* Outer XOR (Internal HMAC)
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*
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* @see Crypt_Hash::setKey()
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* @var String
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* @access private
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*/
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var $opad;
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/**
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* Inner XOR (Internal HMAC)
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*
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* @see Crypt_Hash::setKey()
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* @var String
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* @access private
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*/
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var $ipad;
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/**
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* Default Constructor.
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*
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* @param optional String $hash
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* @return Crypt_Hash
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* @access public
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*/
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function Crypt_Hash($hash = 'sha1')
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{
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if ( !defined('CRYPT_HASH_MODE') ) {
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switch (true) {
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case extension_loaded('hash'):
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define('CRYPT_HASH_MODE', CRYPT_HASH_MODE_HASH);
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break;
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case extension_loaded('mhash'):
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define('CRYPT_HASH_MODE', CRYPT_HASH_MODE_MHASH);
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break;
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default:
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define('CRYPT_HASH_MODE', CRYPT_HASH_MODE_INTERNAL);
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}
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}
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$this->setHash($hash);
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}
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/**
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* Sets the key for HMACs
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*
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* Keys can be of any length.
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*
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* @access public
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* @param optional String $key
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*/
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function setKey($key = false)
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{
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$this->key = $key;
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}
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/**
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* Gets the hash function.
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*
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* As set by the constructor or by the setHash() method.
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*
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* @access public
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* @return String
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*/
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function getHash()
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{
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return $this->hashParam;
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}
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/**
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* Sets the hash function.
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*
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* @access public
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* @param String $hash
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*/
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function setHash($hash)
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{
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$this->hashParam = $hash = strtolower($hash);
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switch ($hash) {
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case 'md5-96':
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case 'sha1-96':
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case 'sha256-96':
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case 'sha512-96':
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$hash = substr($hash, 0, -3);
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$this->l = 12; // 96 / 8 = 12
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break;
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case 'md2':
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case 'md5':
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$this->l = 16;
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break;
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case 'sha1':
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$this->l = 20;
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break;
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case 'sha256':
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$this->l = 32;
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break;
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case 'sha384':
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$this->l = 48;
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break;
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case 'sha512':
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$this->l = 64;
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}
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switch ($hash) {
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case 'md2':
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$mode = CRYPT_HASH_MODE == CRYPT_HASH_MODE_HASH && in_array('md2', hash_algos()) ?
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CRYPT_HASH_MODE_HASH : CRYPT_HASH_MODE_INTERNAL;
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break;
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case 'sha384':
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case 'sha512':
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$mode = CRYPT_HASH_MODE == CRYPT_HASH_MODE_MHASH ? CRYPT_HASH_MODE_INTERNAL : CRYPT_HASH_MODE;
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break;
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default:
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$mode = CRYPT_HASH_MODE;
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}
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switch ( $mode ) {
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case CRYPT_HASH_MODE_MHASH:
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switch ($hash) {
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case 'md5':
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$this->hash = MHASH_MD5;
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break;
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case 'sha256':
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$this->hash = MHASH_SHA256;
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break;
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case 'sha1':
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default:
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$this->hash = MHASH_SHA1;
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}
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return;
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case CRYPT_HASH_MODE_HASH:
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switch ($hash) {
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case 'md5':
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$this->hash = 'md5';
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return;
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case 'md2':
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case 'sha256':
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case 'sha384':
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case 'sha512':
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$this->hash = $hash;
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return;
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case 'sha1':
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default:
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$this->hash = 'sha1';
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}
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return;
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}
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switch ($hash) {
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case 'md2':
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$this->b = 16;
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$this->hash = array($this, '_md2');
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break;
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case 'md5':
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$this->b = 64;
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$this->hash = array($this, '_md5');
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break;
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case 'sha256':
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$this->b = 64;
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$this->hash = array($this, '_sha256');
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break;
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case 'sha384':
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case 'sha512':
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$this->b = 128;
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$this->hash = array($this, '_sha512');
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break;
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case 'sha1':
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default:
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$this->b = 64;
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$this->hash = array($this, '_sha1');
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}
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$this->ipad = str_repeat(chr(0x36), $this->b);
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$this->opad = str_repeat(chr(0x5C), $this->b);
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}
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/**
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* Compute the HMAC.
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*
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* @access public
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* @param String $text
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* @return String
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*/
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function hash($text)
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{
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$mode = is_array($this->hash) ? CRYPT_HASH_MODE_INTERNAL : CRYPT_HASH_MODE;
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if (!empty($this->key) || is_string($this->key)) {
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switch ( $mode ) {
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case CRYPT_HASH_MODE_MHASH:
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$output = mhash($this->hash, $text, $this->key);
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break;
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case CRYPT_HASH_MODE_HASH:
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$output = hash_hmac($this->hash, $text, $this->key, true);
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break;
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case CRYPT_HASH_MODE_INTERNAL:
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/* "Applications that use keys longer than B bytes will first hash the key using H and then use the
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resultant L byte string as the actual key to HMAC."
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-- http://tools.ietf.org/html/rfc2104#section-2 */
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$key = strlen($this->key) > $this->b ? call_user_func($this->hash, $this->key) : $this->key;
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$key = str_pad($key, $this->b, chr(0)); // step 1
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$temp = $this->ipad ^ $key; // step 2
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$temp .= $text; // step 3
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$temp = call_user_func($this->hash, $temp); // step 4
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$output = $this->opad ^ $key; // step 5
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$output.= $temp; // step 6
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$output = call_user_func($this->hash, $output); // step 7
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}
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} else {
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switch ( $mode ) {
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case CRYPT_HASH_MODE_MHASH:
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$output = mhash($this->hash, $text);
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break;
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case CRYPT_HASH_MODE_HASH:
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$output = hash($this->hash, $text, true);
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break;
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case CRYPT_HASH_MODE_INTERNAL:
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$output = call_user_func($this->hash, $text);
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}
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}
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return substr($output, 0, $this->l);
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}
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/**
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* Returns the hash length (in bytes)
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*
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* @access public
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* @return Integer
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*/
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function getLength()
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{
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return $this->l;
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}
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/**
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* Wrapper for MD5
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*
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* @access private
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* @param String $m
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*/
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function _md5($m)
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{
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return pack('H*', md5($m));
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}
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/**
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* Wrapper for SHA1
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*
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* @access private
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* @param String $m
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*/
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function _sha1($m)
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{
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return pack('H*', sha1($m));
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}
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/**
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* Pure-PHP implementation of MD2
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*
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* See {@link http://tools.ietf.org/html/rfc1319 RFC1319}.
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*
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* @access private
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* @param String $m
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*/
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function _md2($m)
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{
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static $s = array(
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41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
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19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
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76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
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138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
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245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
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148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
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39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
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181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
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150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
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112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
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96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
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85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
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234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
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129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
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8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
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203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
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166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
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31, 26, 219, 153, 141, 51, 159, 17, 131, 20
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);
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// Step 1. Append Padding Bytes
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$pad = 16 - (strlen($m) & 0xF);
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$m.= str_repeat(chr($pad), $pad);
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$length = strlen($m);
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// Step 2. Append Checksum
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$c = str_repeat(chr(0), 16);
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$l = chr(0);
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for ($i = 0; $i < $length; $i+= 16) {
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for ($j = 0; $j < 16; $j++) {
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// RFC1319 incorrectly states that C[j] should be set to S[c xor L]
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//$c[$j] = chr($s[ord($m[$i + $j] ^ $l)]);
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// per <http://www.rfc-editor.org/errata_search.php?rfc=1319>, however, C[j] should be set to S[c xor L] xor C[j]
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$c[$j] = chr($s[ord($m[$i + $j] ^ $l)] ^ ord($c[$j]));
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$l = $c[$j];
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}
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}
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$m.= $c;
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$length+= 16;
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// Step 3. Initialize MD Buffer
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$x = str_repeat(chr(0), 48);
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// Step 4. Process Message in 16-Byte Blocks
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for ($i = 0; $i < $length; $i+= 16) {
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for ($j = 0; $j < 16; $j++) {
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$x[$j + 16] = $m[$i + $j];
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$x[$j + 32] = $x[$j + 16] ^ $x[$j];
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}
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$t = chr(0);
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for ($j = 0; $j < 18; $j++) {
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for ($k = 0; $k < 48; $k++) {
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$x[$k] = $t = $x[$k] ^ chr($s[ord($t)]);
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//$t = $x[$k] = $x[$k] ^ chr($s[ord($t)]);
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}
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$t = chr(ord($t) + $j);
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}
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}
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// Step 5. Output
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return substr($x, 0, 16);
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}
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/**
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* Pure-PHP implementation of SHA256
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*
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* 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}.
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*
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* @access private
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* @param String $m
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*/
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function _sha256($m)
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{
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if (extension_loaded('suhosin')) {
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return pack('H*', sha256($m));
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}
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// Initialize variables
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$hash = array(
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
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);
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// Initialize table of round constants
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// (first 32 bits of the fractional parts of the cube roots of the first 64 primes 2..311)
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static $k = array(
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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);
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// Pre-processing
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$length = strlen($m);
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// 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 $m
|
|
*/
|
|
function _sha512($m)
|
|
{
|
|
if (!class_exists('Math_BigInteger')) {
|
|
include_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 Integer $...
|
|
* @return Integer
|
|
* @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;
|
|
}
|
|
}
|