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d9e9504fba
* PSR2-1.0: Fix indentation phpcbf did not fix. Remove PSR2.Methods.FunctionCallSignature.SpaceAfterOpenBracket exception. Use phpcbf to fix PHP code to ruleset. Ignore coding guidelines in ANSI switch block. Base code sniffer ruleset on PSR2 rather than PEAR. Update PHP Code Sniffer to 2.3.3 Conflicts: build/code-sniffer-ruleset-tests.xml build/code-sniffer-ruleset.xml composer.lock phpseclib/Crypt/DES.php phpseclib/Crypt/Hash.php phpseclib/Crypt/RSA.php phpseclib/File/X509.php phpseclib/Math/BigInteger.php phpseclib/Net/SFTP.php phpseclib/Net/SSH1.php phpseclib/Net/SSH2.php tests/Functional/Net/SFTPUserStoryTest.php tests/Unit/Crypt/TwofishTest.php
826 lines
27 KiB
PHP
826 lines
27 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 \phpseclib\Crypt\Hash::setKey() setKey()} is called, {@link \phpseclib\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 version 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 'vendor/autoload.php';
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*
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* $hash = new \phpseclib\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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* @category Crypt
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* @package 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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namespace phpseclib\Crypt;
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use phpseclib\Math\BigInteger;
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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 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 Hash
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{
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/**#@+
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* @access private
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* @see \phpseclib\Crypt\Hash::__construct()
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*/
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/**
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* Toggles the internal implementation
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*/
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const 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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const 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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const MODE_HASH = 3;
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/**#@-*/
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/**
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* Hash Parameter
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*
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* @see \phpseclib\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 \phpseclib\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 \phpseclib\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 \phpseclib\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 \phpseclib\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 \phpseclib\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 \phpseclib\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 $hash
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* @return \phpseclib\Crypt\Hash
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* @access public
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*/
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function __construct($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', self::MODE_HASH);
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break;
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case extension_loaded('mhash'):
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define('CRYPT_HASH_MODE', self::MODE_MHASH);
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break;
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default:
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define('CRYPT_HASH_MODE', self::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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$mode = CRYPT_HASH_MODE == self::MODE_HASH && in_array('md2', hash_algos()) ?
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self::MODE_HASH : self::MODE_INTERNAL;
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break;
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case 'sha384':
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case 'sha512':
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$mode = CRYPT_HASH_MODE == self::MODE_MHASH ? self::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 self::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 self::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) ? self::MODE_INTERNAL : CRYPT_HASH_MODE;
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if (!empty($this->key) || is_string($this->key)) {
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switch ($mode) {
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case self::MODE_MHASH:
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$output = mhash($this->hash, $text, $this->key);
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break;
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case self::MODE_HASH:
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$output = hash_hmac($this->hash, $text, $this->key, true);
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break;
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case self::MODE_INTERNAL:
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/* "Applications that use keys longer than B bytes will first hash the key using H and then use the
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resultant L byte string as the actual key to HMAC."
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-- http://tools.ietf.org/html/rfc2104#section-2 */
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$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 self::MODE_MHASH:
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$output = mhash($this->hash, $text);
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break;
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case self::MODE_HASH:
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$output = hash($this->hash, $text, true);
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break;
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case self::MODE_INTERNAL:
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$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($m);
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// to round to nearest 56 mod 64, we'll add 64 - (length + (64 - 56)) % 64
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$m.= str_repeat(chr(0), 64 - (($length + 8) & 0x3F));
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$m[$length] = chr(0x80);
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|
// 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++) {
|
|
// @codingStandardsIgnoreStart
|
|
$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);
|
|
// @codingStandardsIgnoreEnd
|
|
$w[$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)
|
|
{
|
|
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 BigInteger($init384[$i], 16);
|
|
$init384[$i]->setPrecision(64);
|
|
$init512[$i] = new 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 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++) {
|
|
$temp = new BigInteger($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)
|
|
// (\phpseclib\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. 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;
|
|
}
|
|
}
|