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<?php
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/**
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* Pure-PHP implementation of Rijndael.
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*
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* Uses mcrypt, if available/possible, and an internal implementation, otherwise.
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*
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* PHP version 5
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*
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* If {@link self::setBlockLength() setBlockLength()} isn't called, it'll be assumed to be 128 bits. If
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* {@link self::setKeyLength() setKeyLength()} isn't called, it'll be calculated from
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* {@link self::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's
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* 136-bits it'll be null-padded to 192-bits and 192 bits will be the key length until
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* {@link self::setKey() setKey()} is called, again, at which point, it'll be recalculated.
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*
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* Not all Rijndael implementations may support 160-bits or 224-bits as the block length / key length. mcrypt, for example,
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* does not. AES, itself, only supports block lengths of 128 and key lengths of 128, 192, and 256.
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* {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=10 Rijndael-ammended.pdf#page=10} defines the
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* algorithm for block lengths of 192 and 256 but not for block lengths / key lengths of 160 and 224. Indeed, 160 and 224
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* are first defined as valid key / block lengths in
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* {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=44 Rijndael-ammended.pdf#page=44}:
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* Extensions: Other block and Cipher Key lengths.
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* Note: Use of 160/224-bit Keys must be explicitly set by setKeyLength(160) respectively setKeyLength(224).
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*
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* {@internal The variable names are the same as those in
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* {@link http://www.csrc.nist.gov/publications/fips/fips197/fips-197.pdf#page=10 fips-197.pdf#page=10}.}}
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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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* $rijndael = new \phpseclib\Crypt\Rijndael();
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*
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* $rijndael->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 $rijndael->decrypt($rijndael->encrypt($plaintext));
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* ?>
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* </code>
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*
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* @category Crypt
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* @package Rijndael
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright 2008 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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/**
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* Pure-PHP implementation of Rijndael.
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*
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* @package Rijndael
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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 Rijndael extends Base
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{
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/**
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* The mcrypt specific name of the cipher
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*
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* Mcrypt is useable for 128/192/256-bit $block_size/$key_length. For 160/224 not.
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* \phpseclib\Crypt\Rijndael determines automatically whether mcrypt is useable
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* or not for the current $block_size/$key_length.
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* In case of, $cipher_name_mcrypt will be set dynamically at run time accordingly.
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*
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* @see \phpseclib\Crypt\Base::cipher_name_mcrypt
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* @see \phpseclib\Crypt\Base::engine
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* @see self::isValidEngine()
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* @var string
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* @access private
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*/
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var $cipher_name_mcrypt = 'rijndael-128';
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/**
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* The default salt used by setPassword()
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*
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* @see \phpseclib\Crypt\Base::password_default_salt
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* @see \phpseclib\Crypt\Base::setPassword()
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* @var string
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* @access private
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*/
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var $password_default_salt = 'phpseclib';
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/**
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* The Key Schedule
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*
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* @see self::_setup()
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* @var array
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* @access private
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*/
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var $w;
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/**
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* The Inverse Key Schedule
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*
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* @see self::_setup()
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* @var array
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* @access private
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*/
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var $dw;
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/**
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* The Block Length divided by 32
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*
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* @see self::setBlockLength()
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* @var int
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* @access private
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* @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4. Exists in conjunction with $block_size
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* because the encryption / decryption / key schedule creation requires this number and not $block_size. We could
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* derive this from $block_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu
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* of that, we'll just precompute it once.
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*/
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var $Nb = 4;
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/**
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* The Key Length (in bytes)
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*
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* @see self::setKeyLength()
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* @var int
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* @access private
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* @internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $Nk
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* because the encryption / decryption / key schedule creation requires this number and not $key_length. We could
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* derive this from $key_length or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu
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* of that, we'll just precompute it once.
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*/
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var $key_length = 16;
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/**
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* The Key Length divided by 32
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*
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* @see self::setKeyLength()
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* @var int
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* @access private
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* @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4
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*/
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var $Nk = 4;
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/**
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* The Number of Rounds
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*
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* @var int
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* @access private
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* @internal The max value is 14, the min value is 10.
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*/
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var $Nr;
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/**
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* Shift offsets
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*
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* @var array
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* @access private
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*/
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var $c;
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/**
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* Holds the last used key- and block_size information
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*
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* @var array
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* @access private
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*/
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var $kl;
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/**
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* Sets the key length.
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*
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* Valid key lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to
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* 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount.
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*
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* Note: phpseclib extends Rijndael (and AES) for using 160- and 224-bit keys but they are officially not defined
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* and the most (if not all) implementations are not able using 160/224-bit keys but round/pad them up to
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* 192/256 bits as, for example, mcrypt will do.
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*
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* That said, if you want be compatible with other Rijndael and AES implementations,
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* you should not setKeyLength(160) or setKeyLength(224).
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*
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* Additional: In case of 160- and 224-bit keys, phpseclib will/can, for that reason, not use
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* the mcrypt php extension, even if available.
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* This results then in slower encryption.
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*
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* @access public
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* @param int $length
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*/
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function setKeyLength($length)
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{
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switch (true) {
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case $length <= 128:
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$this->key_length = 16;
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break;
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case $length <= 160:
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$this->key_length = 20;
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break;
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case $length <= 192:
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$this->key_length = 24;
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break;
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case $length <= 224:
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$this->key_length = 28;
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break;
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default:
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$this->key_length = 32;
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}
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parent::setKeyLength($length);
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}
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/**
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* Sets the block length
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*
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* Valid block lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to
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* 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount.
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*
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* @access public
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* @param int $length
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*/
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function setBlockLength($length)
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{
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$length >>= 5;
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if ($length > 8) {
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$length = 8;
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} elseif ($length < 4) {
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$length = 4;
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}
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$this->Nb = $length;
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$this->block_size = $length << 2;
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$this->changed = true;
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$this->_setEngine();
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}
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/**
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* Test for engine validity
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*
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* This is mainly just a wrapper to set things up for \phpseclib\Crypt\Base::isValidEngine()
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*
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* @see \phpseclib\Crypt\Base::__construct()
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* @param int $engine
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* @access public
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* @return bool
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*/
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function isValidEngine($engine)
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{
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switch ($engine) {
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case self::ENGINE_OPENSSL:
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if ($this->block_size != 16) {
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return false;
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}
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$this->cipher_name_openssl_ecb = 'aes-' . ($this->key_length << 3) . '-ecb';
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$this->cipher_name_openssl = 'aes-' . ($this->key_length << 3) . '-' . $this->_openssl_translate_mode();
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break;
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case self::ENGINE_MCRYPT:
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$this->cipher_name_mcrypt = 'rijndael-' . ($this->block_size << 3);
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if ($this->key_length % 8) { // is it a 160/224-bit key?
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// mcrypt is not usable for them, only for 128/192/256-bit keys
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return false;
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}
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}
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return parent::isValidEngine($engine);
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}
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/**
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* Encrypts a block
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*
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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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static $tables;
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if (empty($tables)) {
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$tables = &$this->_getTables();
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}
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$t0 = $tables[0];
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$t1 = $tables[1];
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$t2 = $tables[2];
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$t3 = $tables[3];
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$sbox = $tables[4];
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285 |
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$state = array();
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$words = unpack('N*', $in);
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288 |
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289 |
$c = $this->c;
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$w = $this->w;
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$Nb = $this->Nb;
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$Nr = $this->Nr;
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293 |
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// addRoundKey
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$wc = $Nb - 1;
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foreach ($words as $word) {
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297 |
$state[] = $word ^ $w[++$wc];
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298 |
}
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299 |
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300 |
// fips-197.pdf#page=19, "Figure 5. Pseudo Code for the Cipher", states that this loop has four components -
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// subBytes, shiftRows, mixColumns, and addRoundKey. fips-197.pdf#page=30, "Implementation Suggestions Regarding
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// Various Platforms" suggests that performs enhanced implementations are described in Rijndael-ammended.pdf.
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// Rijndael-ammended.pdf#page=20, "Implementation aspects / 32-bit processor", discusses such an optimization.
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304 |
// Unfortunately, the description given there is not quite correct. Per aes.spec.v316.pdf#page=19 [1],
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// equation (7.4.7) is supposed to use addition instead of subtraction, so we'll do that here, as well.
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306 |
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// [1] http://fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.v316.pdf
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$temp = array();
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309 |
for ($round = 1; $round < $Nr; ++$round) {
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310 |
$i = 0; // $c[0] == 0
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311 |
$j = $c[1];
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312 |
$k = $c[2];
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313 |
$l = $c[3];
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314 |
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315 |
while ($i < $Nb) {
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316 |
$temp[$i] = $t0[$state[$i] >> 24 & 0x000000FF] ^
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317 |
$t1[$state[$j] >> 16 & 0x000000FF] ^
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318 |
$t2[$state[$k] >> 8 & 0x000000FF] ^
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319 |
$t3[$state[$l] & 0x000000FF] ^
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320 |
$w[++$wc];
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321 |
++$i;
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322 |
$j = ($j + 1) % $Nb;
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$k = ($k + 1) % $Nb;
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$l = ($l + 1) % $Nb;
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325 |
}
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326 |
$state = $temp;
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327 |
}
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328 |
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329 |
// subWord
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330 |
for ($i = 0; $i < $Nb; ++$i) {
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$state[$i] = $sbox[$state[$i] & 0x000000FF] |
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332 |
($sbox[$state[$i] >> 8 & 0x000000FF] << 8) |
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333 |
($sbox[$state[$i] >> 16 & 0x000000FF] << 16) |
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($sbox[$state[$i] >> 24 & 0x000000FF] << 24);
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335 |
}
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336 |
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337 |
// shiftRows + addRoundKey
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338 |
$i = 0; // $c[0] == 0
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339 |
$j = $c[1];
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340 |
$k = $c[2];
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341 |
$l = $c[3];
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342 |
while ($i < $Nb) {
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343 |
$temp[$i] = ($state[$i] & 0xFF000000) ^
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344 |
($state[$j] & 0x00FF0000) ^
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345 |
($state[$k] & 0x0000FF00) ^
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346 |
($state[$l] & 0x000000FF) ^
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347 |
$w[$i];
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348 |
++$i;
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349 |
$j = ($j + 1) % $Nb;
|
|
|
350 |
$k = ($k + 1) % $Nb;
|
|
|
351 |
$l = ($l + 1) % $Nb;
|
|
|
352 |
}
|
|
|
353 |
|
|
|
354 |
switch ($Nb) {
|
|
|
355 |
case 8:
|
|
|
356 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]);
|
|
|
357 |
case 7:
|
|
|
358 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]);
|
|
|
359 |
case 6:
|
|
|
360 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]);
|
|
|
361 |
case 5:
|
|
|
362 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]);
|
|
|
363 |
default:
|
|
|
364 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]);
|
|
|
365 |
}
|
|
|
366 |
}
|
|
|
367 |
|
|
|
368 |
/**
|
|
|
369 |
* Decrypts a block
|
|
|
370 |
*
|
|
|
371 |
* @access private
|
|
|
372 |
* @param string $in
|
|
|
373 |
* @return string
|
|
|
374 |
*/
|
|
|
375 |
function _decryptBlock($in)
|
|
|
376 |
{
|
|
|
377 |
static $invtables;
|
|
|
378 |
if (empty($invtables)) {
|
|
|
379 |
$invtables = &$this->_getInvTables();
|
|
|
380 |
}
|
|
|
381 |
$dt0 = $invtables[0];
|
|
|
382 |
$dt1 = $invtables[1];
|
|
|
383 |
$dt2 = $invtables[2];
|
|
|
384 |
$dt3 = $invtables[3];
|
|
|
385 |
$isbox = $invtables[4];
|
|
|
386 |
|
|
|
387 |
$state = array();
|
|
|
388 |
$words = unpack('N*', $in);
|
|
|
389 |
|
|
|
390 |
$c = $this->c;
|
|
|
391 |
$dw = $this->dw;
|
|
|
392 |
$Nb = $this->Nb;
|
|
|
393 |
$Nr = $this->Nr;
|
|
|
394 |
|
|
|
395 |
// addRoundKey
|
|
|
396 |
$wc = $Nb - 1;
|
|
|
397 |
foreach ($words as $word) {
|
|
|
398 |
$state[] = $word ^ $dw[++$wc];
|
|
|
399 |
}
|
|
|
400 |
|
|
|
401 |
$temp = array();
|
|
|
402 |
for ($round = $Nr - 1; $round > 0; --$round) {
|
|
|
403 |
$i = 0; // $c[0] == 0
|
|
|
404 |
$j = $Nb - $c[1];
|
|
|
405 |
$k = $Nb - $c[2];
|
|
|
406 |
$l = $Nb - $c[3];
|
|
|
407 |
|
|
|
408 |
while ($i < $Nb) {
|
|
|
409 |
$temp[$i] = $dt0[$state[$i] >> 24 & 0x000000FF] ^
|
|
|
410 |
$dt1[$state[$j] >> 16 & 0x000000FF] ^
|
|
|
411 |
$dt2[$state[$k] >> 8 & 0x000000FF] ^
|
|
|
412 |
$dt3[$state[$l] & 0x000000FF] ^
|
|
|
413 |
$dw[++$wc];
|
|
|
414 |
++$i;
|
|
|
415 |
$j = ($j + 1) % $Nb;
|
|
|
416 |
$k = ($k + 1) % $Nb;
|
|
|
417 |
$l = ($l + 1) % $Nb;
|
|
|
418 |
}
|
|
|
419 |
$state = $temp;
|
|
|
420 |
}
|
|
|
421 |
|
|
|
422 |
// invShiftRows + invSubWord + addRoundKey
|
|
|
423 |
$i = 0; // $c[0] == 0
|
|
|
424 |
$j = $Nb - $c[1];
|
|
|
425 |
$k = $Nb - $c[2];
|
|
|
426 |
$l = $Nb - $c[3];
|
|
|
427 |
|
|
|
428 |
while ($i < $Nb) {
|
|
|
429 |
$word = ($state[$i] & 0xFF000000) |
|
|
|
430 |
($state[$j] & 0x00FF0000) |
|
|
|
431 |
($state[$k] & 0x0000FF00) |
|
|
|
432 |
($state[$l] & 0x000000FF);
|
|
|
433 |
|
|
|
434 |
$temp[$i] = $dw[$i] ^ ($isbox[$word & 0x000000FF] |
|
|
|
435 |
($isbox[$word >> 8 & 0x000000FF] << 8) |
|
|
|
436 |
($isbox[$word >> 16 & 0x000000FF] << 16) |
|
|
|
437 |
($isbox[$word >> 24 & 0x000000FF] << 24));
|
|
|
438 |
++$i;
|
|
|
439 |
$j = ($j + 1) % $Nb;
|
|
|
440 |
$k = ($k + 1) % $Nb;
|
|
|
441 |
$l = ($l + 1) % $Nb;
|
|
|
442 |
}
|
|
|
443 |
|
|
|
444 |
switch ($Nb) {
|
|
|
445 |
case 8:
|
|
|
446 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]);
|
|
|
447 |
case 7:
|
|
|
448 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]);
|
|
|
449 |
case 6:
|
|
|
450 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]);
|
|
|
451 |
case 5:
|
|
|
452 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]);
|
|
|
453 |
default:
|
|
|
454 |
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]);
|
|
|
455 |
}
|
|
|
456 |
}
|
|
|
457 |
|
|
|
458 |
/**
|
|
|
459 |
* Setup the key (expansion)
|
|
|
460 |
*
|
|
|
461 |
* @see \phpseclib\Crypt\Base::_setupKey()
|
|
|
462 |
* @access private
|
|
|
463 |
*/
|
|
|
464 |
function _setupKey()
|
|
|
465 |
{
|
|
|
466 |
// Each number in $rcon is equal to the previous number multiplied by two in Rijndael's finite field.
|
|
|
467 |
// See http://en.wikipedia.org/wiki/Finite_field_arithmetic#Multiplicative_inverse
|
|
|
468 |
static $rcon = array(0,
|
|
|
469 |
0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
|
|
|
470 |
0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000,
|
|
|
471 |
0x6C000000, 0xD8000000, 0xAB000000, 0x4D000000, 0x9A000000,
|
|
|
472 |
0x2F000000, 0x5E000000, 0xBC000000, 0x63000000, 0xC6000000,
|
|
|
473 |
0x97000000, 0x35000000, 0x6A000000, 0xD4000000, 0xB3000000,
|
|
|
474 |
0x7D000000, 0xFA000000, 0xEF000000, 0xC5000000, 0x91000000
|
|
|
475 |
);
|
|
|
476 |
|
|
|
477 |
if (isset($this->kl['key']) && $this->key === $this->kl['key'] && $this->key_length === $this->kl['key_length'] && $this->block_size === $this->kl['block_size']) {
|
|
|
478 |
// already expanded
|
|
|
479 |
return;
|
|
|
480 |
}
|
|
|
481 |
$this->kl = array('key' => $this->key, 'key_length' => $this->key_length, 'block_size' => $this->block_size);
|
|
|
482 |
|
|
|
483 |
$this->Nk = $this->key_length >> 2;
|
|
|
484 |
// see Rijndael-ammended.pdf#page=44
|
|
|
485 |
$this->Nr = max($this->Nk, $this->Nb) + 6;
|
|
|
486 |
|
|
|
487 |
// shift offsets for Nb = 5, 7 are defined in Rijndael-ammended.pdf#page=44,
|
|
|
488 |
// "Table 8: Shift offsets in Shiftrow for the alternative block lengths"
|
|
|
489 |
// shift offsets for Nb = 4, 6, 8 are defined in Rijndael-ammended.pdf#page=14,
|
|
|
490 |
// "Table 2: Shift offsets for different block lengths"
|
|
|
491 |
switch ($this->Nb) {
|
|
|
492 |
case 4:
|
|
|
493 |
case 5:
|
|
|
494 |
case 6:
|
|
|
495 |
$this->c = array(0, 1, 2, 3);
|
|
|
496 |
break;
|
|
|
497 |
case 7:
|
|
|
498 |
$this->c = array(0, 1, 2, 4);
|
|
|
499 |
break;
|
|
|
500 |
case 8:
|
|
|
501 |
$this->c = array(0, 1, 3, 4);
|
|
|
502 |
}
|
|
|
503 |
|
|
|
504 |
$w = array_values(unpack('N*words', $this->key));
|
|
|
505 |
|
|
|
506 |
$length = $this->Nb * ($this->Nr + 1);
|
|
|
507 |
for ($i = $this->Nk; $i < $length; $i++) {
|
|
|
508 |
$temp = $w[$i - 1];
|
|
|
509 |
if ($i % $this->Nk == 0) {
|
|
|
510 |
// according to <http://php.net/language.types.integer>, "the size of an integer is platform-dependent".
|
|
|
511 |
// on a 32-bit machine, it's 32-bits, and on a 64-bit machine, it's 64-bits. on a 32-bit machine,
|
|
|
512 |
// 0xFFFFFFFF << 8 == 0xFFFFFF00, but on a 64-bit machine, it equals 0xFFFFFFFF00. as such, doing 'and'
|
|
|
513 |
// with 0xFFFFFFFF (or 0xFFFFFF00) on a 32-bit machine is unnecessary, but on a 64-bit machine, it is.
|
|
|
514 |
$temp = (($temp << 8) & 0xFFFFFF00) | (($temp >> 24) & 0x000000FF); // rotWord
|
|
|
515 |
$temp = $this->_subWord($temp) ^ $rcon[$i / $this->Nk];
|
|
|
516 |
} elseif ($this->Nk > 6 && $i % $this->Nk == 4) {
|
|
|
517 |
$temp = $this->_subWord($temp);
|
|
|
518 |
}
|
|
|
519 |
$w[$i] = $w[$i - $this->Nk] ^ $temp;
|
|
|
520 |
}
|
|
|
521 |
|
|
|
522 |
// convert the key schedule from a vector of $Nb * ($Nr + 1) length to a matrix with $Nr + 1 rows and $Nb columns
|
|
|
523 |
// and generate the inverse key schedule. more specifically,
|
|
|
524 |
// according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=23> (section 5.3.3),
|
|
|
525 |
// "The key expansion for the Inverse Cipher is defined as follows:
|
|
|
526 |
// 1. Apply the Key Expansion.
|
|
|
527 |
// 2. Apply InvMixColumn to all Round Keys except the first and the last one."
|
|
|
528 |
// also, see fips-197.pdf#page=27, "5.3.5 Equivalent Inverse Cipher"
|
|
|
529 |
list($dt0, $dt1, $dt2, $dt3) = $this->_getInvTables();
|
|
|
530 |
$temp = $this->w = $this->dw = array();
|
|
|
531 |
for ($i = $row = $col = 0; $i < $length; $i++, $col++) {
|
|
|
532 |
if ($col == $this->Nb) {
|
|
|
533 |
if ($row == 0) {
|
|
|
534 |
$this->dw[0] = $this->w[0];
|
|
|
535 |
} else {
|
|
|
536 |
// subWord + invMixColumn + invSubWord = invMixColumn
|
|
|
537 |
$j = 0;
|
|
|
538 |
while ($j < $this->Nb) {
|
|
|
539 |
$dw = $this->_subWord($this->w[$row][$j]);
|
|
|
540 |
$temp[$j] = $dt0[$dw >> 24 & 0x000000FF] ^
|
|
|
541 |
$dt1[$dw >> 16 & 0x000000FF] ^
|
|
|
542 |
$dt2[$dw >> 8 & 0x000000FF] ^
|
|
|
543 |
$dt3[$dw & 0x000000FF];
|
|
|
544 |
$j++;
|
|
|
545 |
}
|
|
|
546 |
$this->dw[$row] = $temp;
|
|
|
547 |
}
|
|
|
548 |
|
|
|
549 |
$col = 0;
|
|
|
550 |
$row++;
|
|
|
551 |
}
|
|
|
552 |
$this->w[$row][$col] = $w[$i];
|
|
|
553 |
}
|
|
|
554 |
|
|
|
555 |
$this->dw[$row] = $this->w[$row];
|
|
|
556 |
|
|
|
557 |
// Converting to 1-dim key arrays (both ascending)
|
|
|
558 |
$this->dw = array_reverse($this->dw);
|
|
|
559 |
$w = array_pop($this->w);
|
|
|
560 |
$dw = array_pop($this->dw);
|
|
|
561 |
foreach ($this->w as $r => $wr) {
|
|
|
562 |
foreach ($wr as $c => $wc) {
|
|
|
563 |
$w[] = $wc;
|
|
|
564 |
$dw[] = $this->dw[$r][$c];
|
|
|
565 |
}
|
|
|
566 |
}
|
|
|
567 |
$this->w = $w;
|
|
|
568 |
$this->dw = $dw;
|
|
|
569 |
}
|
|
|
570 |
|
|
|
571 |
/**
|
|
|
572 |
* Performs S-Box substitutions
|
|
|
573 |
*
|
|
|
574 |
* @access private
|
|
|
575 |
* @param int $word
|
|
|
576 |
*/
|
|
|
577 |
function _subWord($word)
|
|
|
578 |
{
|
|
|
579 |
static $sbox;
|
|
|
580 |
if (empty($sbox)) {
|
|
|
581 |
list(, , , , $sbox) = $this->_getTables();
|
|
|
582 |
}
|
|
|
583 |
|
|
|
584 |
return $sbox[$word & 0x000000FF] |
|
|
|
585 |
($sbox[$word >> 8 & 0x000000FF] << 8) |
|
|
|
586 |
($sbox[$word >> 16 & 0x000000FF] << 16) |
|
|
|
587 |
($sbox[$word >> 24 & 0x000000FF] << 24);
|
|
|
588 |
}
|
|
|
589 |
|
|
|
590 |
/**
|
|
|
591 |
* Provides the mixColumns and sboxes tables
|
|
|
592 |
*
|
|
|
593 |
* @see self::_encryptBlock()
|
|
|
594 |
* @see self::_setupInlineCrypt()
|
|
|
595 |
* @see self::_subWord()
|
|
|
596 |
* @access private
|
|
|
597 |
* @return array &$tables
|
|
|
598 |
*/
|
|
|
599 |
function &_getTables()
|
|
|
600 |
{
|
|
|
601 |
static $tables;
|
|
|
602 |
if (empty($tables)) {
|
|
|
603 |
// according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=19> (section 5.2.1),
|
|
|
604 |
// precomputed tables can be used in the mixColumns phase. in that example, they're assigned t0...t3, so
|
|
|
605 |
// those are the names we'll use.
|
|
|
606 |
$t3 = array_map('intval', array(
|
|
|
607 |
// with array_map('intval', ...) we ensure we have only int's and not
|
|
|
608 |
// some slower floats converted by php automatically on high values
|
|
|
609 |
0x6363A5C6, 0x7C7C84F8, 0x777799EE, 0x7B7B8DF6, 0xF2F20DFF, 0x6B6BBDD6, 0x6F6FB1DE, 0xC5C55491,
|
|
|
610 |
0x30305060, 0x01010302, 0x6767A9CE, 0x2B2B7D56, 0xFEFE19E7, 0xD7D762B5, 0xABABE64D, 0x76769AEC,
|
|
|
611 |
0xCACA458F, 0x82829D1F, 0xC9C94089, 0x7D7D87FA, 0xFAFA15EF, 0x5959EBB2, 0x4747C98E, 0xF0F00BFB,
|
|
|
612 |
0xADADEC41, 0xD4D467B3, 0xA2A2FD5F, 0xAFAFEA45, 0x9C9CBF23, 0xA4A4F753, 0x727296E4, 0xC0C05B9B,
|
|
|
613 |
0xB7B7C275, 0xFDFD1CE1, 0x9393AE3D, 0x26266A4C, 0x36365A6C, 0x3F3F417E, 0xF7F702F5, 0xCCCC4F83,
|
|
|
614 |
0x34345C68, 0xA5A5F451, 0xE5E534D1, 0xF1F108F9, 0x717193E2, 0xD8D873AB, 0x31315362, 0x15153F2A,
|
|
|
615 |
0x04040C08, 0xC7C75295, 0x23236546, 0xC3C35E9D, 0x18182830, 0x9696A137, 0x05050F0A, 0x9A9AB52F,
|
|
|
616 |
0x0707090E, 0x12123624, 0x80809B1B, 0xE2E23DDF, 0xEBEB26CD, 0x2727694E, 0xB2B2CD7F, 0x75759FEA,
|
|
|
617 |
0x09091B12, 0x83839E1D, 0x2C2C7458, 0x1A1A2E34, 0x1B1B2D36, 0x6E6EB2DC, 0x5A5AEEB4, 0xA0A0FB5B,
|
|
|
618 |
0x5252F6A4, 0x3B3B4D76, 0xD6D661B7, 0xB3B3CE7D, 0x29297B52, 0xE3E33EDD, 0x2F2F715E, 0x84849713,
|
|
|
619 |
0x5353F5A6, 0xD1D168B9, 0x00000000, 0xEDED2CC1, 0x20206040, 0xFCFC1FE3, 0xB1B1C879, 0x5B5BEDB6,
|
|
|
620 |
0x6A6ABED4, 0xCBCB468D, 0xBEBED967, 0x39394B72, 0x4A4ADE94, 0x4C4CD498, 0x5858E8B0, 0xCFCF4A85,
|
|
|
621 |
0xD0D06BBB, 0xEFEF2AC5, 0xAAAAE54F, 0xFBFB16ED, 0x4343C586, 0x4D4DD79A, 0x33335566, 0x85859411,
|
|
|
622 |
0x4545CF8A, 0xF9F910E9, 0x02020604, 0x7F7F81FE, 0x5050F0A0, 0x3C3C4478, 0x9F9FBA25, 0xA8A8E34B,
|
|
|
623 |
0x5151F3A2, 0xA3A3FE5D, 0x4040C080, 0x8F8F8A05, 0x9292AD3F, 0x9D9DBC21, 0x38384870, 0xF5F504F1,
|
|
|
624 |
0xBCBCDF63, 0xB6B6C177, 0xDADA75AF, 0x21216342, 0x10103020, 0xFFFF1AE5, 0xF3F30EFD, 0xD2D26DBF,
|
|
|
625 |
0xCDCD4C81, 0x0C0C1418, 0x13133526, 0xECEC2FC3, 0x5F5FE1BE, 0x9797A235, 0x4444CC88, 0x1717392E,
|
|
|
626 |
0xC4C45793, 0xA7A7F255, 0x7E7E82FC, 0x3D3D477A, 0x6464ACC8, 0x5D5DE7BA, 0x19192B32, 0x737395E6,
|
|
|
627 |
0x6060A0C0, 0x81819819, 0x4F4FD19E, 0xDCDC7FA3, 0x22226644, 0x2A2A7E54, 0x9090AB3B, 0x8888830B,
|
|
|
628 |
0x4646CA8C, 0xEEEE29C7, 0xB8B8D36B, 0x14143C28, 0xDEDE79A7, 0x5E5EE2BC, 0x0B0B1D16, 0xDBDB76AD,
|
|
|
629 |
0xE0E03BDB, 0x32325664, 0x3A3A4E74, 0x0A0A1E14, 0x4949DB92, 0x06060A0C, 0x24246C48, 0x5C5CE4B8,
|
|
|
630 |
0xC2C25D9F, 0xD3D36EBD, 0xACACEF43, 0x6262A6C4, 0x9191A839, 0x9595A431, 0xE4E437D3, 0x79798BF2,
|
|
|
631 |
0xE7E732D5, 0xC8C8438B, 0x3737596E, 0x6D6DB7DA, 0x8D8D8C01, 0xD5D564B1, 0x4E4ED29C, 0xA9A9E049,
|
|
|
632 |
0x6C6CB4D8, 0x5656FAAC, 0xF4F407F3, 0xEAEA25CF, 0x6565AFCA, 0x7A7A8EF4, 0xAEAEE947, 0x08081810,
|
|
|
633 |
0xBABAD56F, 0x787888F0, 0x25256F4A, 0x2E2E725C, 0x1C1C2438, 0xA6A6F157, 0xB4B4C773, 0xC6C65197,
|
|
|
634 |
0xE8E823CB, 0xDDDD7CA1, 0x74749CE8, 0x1F1F213E, 0x4B4BDD96, 0xBDBDDC61, 0x8B8B860D, 0x8A8A850F,
|
|
|
635 |
0x707090E0, 0x3E3E427C, 0xB5B5C471, 0x6666AACC, 0x4848D890, 0x03030506, 0xF6F601F7, 0x0E0E121C,
|
|
|
636 |
0x6161A3C2, 0x35355F6A, 0x5757F9AE, 0xB9B9D069, 0x86869117, 0xC1C15899, 0x1D1D273A, 0x9E9EB927,
|
|
|
637 |
0xE1E138D9, 0xF8F813EB, 0x9898B32B, 0x11113322, 0x6969BBD2, 0xD9D970A9, 0x8E8E8907, 0x9494A733,
|
|
|
638 |
0x9B9BB62D, 0x1E1E223C, 0x87879215, 0xE9E920C9, 0xCECE4987, 0x5555FFAA, 0x28287850, 0xDFDF7AA5,
|
|
|
639 |
0x8C8C8F03, 0xA1A1F859, 0x89898009, 0x0D0D171A, 0xBFBFDA65, 0xE6E631D7, 0x4242C684, 0x6868B8D0,
|
|
|
640 |
0x4141C382, 0x9999B029, 0x2D2D775A, 0x0F0F111E, 0xB0B0CB7B, 0x5454FCA8, 0xBBBBD66D, 0x16163A2C
|
|
|
641 |
));
|
|
|
642 |
|
|
|
643 |
foreach ($t3 as $t3i) {
|
|
|
644 |
$t0[] = (($t3i << 24) & 0xFF000000) | (($t3i >> 8) & 0x00FFFFFF);
|
|
|
645 |
$t1[] = (($t3i << 16) & 0xFFFF0000) | (($t3i >> 16) & 0x0000FFFF);
|
|
|
646 |
$t2[] = (($t3i << 8) & 0xFFFFFF00) | (($t3i >> 24) & 0x000000FF);
|
|
|
647 |
}
|
|
|
648 |
|
|
|
649 |
$tables = array(
|
|
|
650 |
// The Precomputed mixColumns tables t0 - t3
|
|
|
651 |
$t0,
|
|
|
652 |
$t1,
|
|
|
653 |
$t2,
|
|
|
654 |
$t3,
|
|
|
655 |
// The SubByte S-Box
|
|
|
656 |
array(
|
|
|
657 |
0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
|
|
|
658 |
0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
|
|
|
659 |
0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
|
|
|
660 |
0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
|
|
|
661 |
0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
|
|
|
662 |
0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
|
|
|
663 |
0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
|
|
|
664 |
0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
|
|
|
665 |
0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
|
|
|
666 |
0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
|
|
|
667 |
0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
|
|
|
668 |
0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
|
|
|
669 |
0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
|
|
|
670 |
0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
|
|
|
671 |
0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
|
|
|
672 |
0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
|
|
|
673 |
)
|
|
|
674 |
);
|
|
|
675 |
}
|
|
|
676 |
return $tables;
|
|
|
677 |
}
|
|
|
678 |
|
|
|
679 |
/**
|
|
|
680 |
* Provides the inverse mixColumns and inverse sboxes tables
|
|
|
681 |
*
|
|
|
682 |
* @see self::_decryptBlock()
|
|
|
683 |
* @see self::_setupInlineCrypt()
|
|
|
684 |
* @see self::_setupKey()
|
|
|
685 |
* @access private
|
|
|
686 |
* @return array &$tables
|
|
|
687 |
*/
|
|
|
688 |
function &_getInvTables()
|
|
|
689 |
{
|
|
|
690 |
static $tables;
|
|
|
691 |
if (empty($tables)) {
|
|
|
692 |
$dt3 = array_map('intval', array(
|
|
|
693 |
0xF4A75051, 0x4165537E, 0x17A4C31A, 0x275E963A, 0xAB6BCB3B, 0x9D45F11F, 0xFA58ABAC, 0xE303934B,
|
|
|
694 |
0x30FA5520, 0x766DF6AD, 0xCC769188, 0x024C25F5, 0xE5D7FC4F, 0x2ACBD7C5, 0x35448026, 0x62A38FB5,
|
|
|
695 |
0xB15A49DE, 0xBA1B6725, 0xEA0E9845, 0xFEC0E15D, 0x2F7502C3, 0x4CF01281, 0x4697A38D, 0xD3F9C66B,
|
|
|
696 |
0x8F5FE703, 0x929C9515, 0x6D7AEBBF, 0x5259DA95, 0xBE832DD4, 0x7421D358, 0xE0692949, 0xC9C8448E,
|
|
|
697 |
0xC2896A75, 0x8E7978F4, 0x583E6B99, 0xB971DD27, 0xE14FB6BE, 0x88AD17F0, 0x20AC66C9, 0xCE3AB47D,
|
|
|
698 |
0xDF4A1863, 0x1A3182E5, 0x51336097, 0x537F4562, 0x6477E0B1, 0x6BAE84BB, 0x81A01CFE, 0x082B94F9,
|
|
|
699 |
0x48685870, 0x45FD198F, 0xDE6C8794, 0x7BF8B752, 0x73D323AB, 0x4B02E272, 0x1F8F57E3, 0x55AB2A66,
|
|
|
700 |
0xEB2807B2, 0xB5C2032F, 0xC57B9A86, 0x3708A5D3, 0x2887F230, 0xBFA5B223, 0x036ABA02, 0x16825CED,
|
|
|
701 |
0xCF1C2B8A, 0x79B492A7, 0x07F2F0F3, 0x69E2A14E, 0xDAF4CD65, 0x05BED506, 0x34621FD1, 0xA6FE8AC4,
|
|
|
702 |
0x2E539D34, 0xF355A0A2, 0x8AE13205, 0xF6EB75A4, 0x83EC390B, 0x60EFAA40, 0x719F065E, 0x6E1051BD,
|
|
|
703 |
0x218AF93E, 0xDD063D96, 0x3E05AEDD, 0xE6BD464D, 0x548DB591, 0xC45D0571, 0x06D46F04, 0x5015FF60,
|
|
|
704 |
0x98FB2419, 0xBDE997D6, 0x4043CC89, 0xD99E7767, 0xE842BDB0, 0x898B8807, 0x195B38E7, 0xC8EEDB79,
|
|
|
705 |
0x7C0A47A1, 0x420FE97C, 0x841EC9F8, 0x00000000, 0x80868309, 0x2BED4832, 0x1170AC1E, 0x5A724E6C,
|
|
|
706 |
0x0EFFFBFD, 0x8538560F, 0xAED51E3D, 0x2D392736, 0x0FD9640A, 0x5CA62168, 0x5B54D19B, 0x362E3A24,
|
|
|
707 |
0x0A67B10C, 0x57E70F93, 0xEE96D2B4, 0x9B919E1B, 0xC0C54F80, 0xDC20A261, 0x774B695A, 0x121A161C,
|
|
|
708 |
0x93BA0AE2, 0xA02AE5C0, 0x22E0433C, 0x1B171D12, 0x090D0B0E, 0x8BC7ADF2, 0xB6A8B92D, 0x1EA9C814,
|
|
|
709 |
0xF1198557, 0x75074CAF, 0x99DDBBEE, 0x7F60FDA3, 0x01269FF7, 0x72F5BC5C, 0x663BC544, 0xFB7E345B,
|
|
|
710 |
0x4329768B, 0x23C6DCCB, 0xEDFC68B6, 0xE4F163B8, 0x31DCCAD7, 0x63851042, 0x97224013, 0xC6112084,
|
|
|
711 |
0x4A247D85, 0xBB3DF8D2, 0xF93211AE, 0x29A16DC7, 0x9E2F4B1D, 0xB230F3DC, 0x8652EC0D, 0xC1E3D077,
|
|
|
712 |
0xB3166C2B, 0x70B999A9, 0x9448FA11, 0xE9642247, 0xFC8CC4A8, 0xF03F1AA0, 0x7D2CD856, 0x3390EF22,
|
|
|
713 |
0x494EC787, 0x38D1C1D9, 0xCAA2FE8C, 0xD40B3698, 0xF581CFA6, 0x7ADE28A5, 0xB78E26DA, 0xADBFA43F,
|
|
|
714 |
0x3A9DE42C, 0x78920D50, 0x5FCC9B6A, 0x7E466254, 0x8D13C2F6, 0xD8B8E890, 0x39F75E2E, 0xC3AFF582,
|
|
|
715 |
0x5D80BE9F, 0xD0937C69, 0xD52DA96F, 0x2512B3CF, 0xAC993BC8, 0x187DA710, 0x9C636EE8, 0x3BBB7BDB,
|
|
|
716 |
0x267809CD, 0x5918F46E, 0x9AB701EC, 0x4F9AA883, 0x956E65E6, 0xFFE67EAA, 0xBCCF0821, 0x15E8E6EF,
|
|
|
717 |
0xE79BD9BA, 0x6F36CE4A, 0x9F09D4EA, 0xB07CD629, 0xA4B2AF31, 0x3F23312A, 0xA59430C6, 0xA266C035,
|
|
|
718 |
0x4EBC3774, 0x82CAA6FC, 0x90D0B0E0, 0xA7D81533, 0x04984AF1, 0xECDAF741, 0xCD500E7F, 0x91F62F17,
|
|
|
719 |
0x4DD68D76, 0xEFB04D43, 0xAA4D54CC, 0x9604DFE4, 0xD1B5E39E, 0x6A881B4C, 0x2C1FB8C1, 0x65517F46,
|
|
|
720 |
0x5EEA049D, 0x8C355D01, 0x877473FA, 0x0B412EFB, 0x671D5AB3, 0xDBD25292, 0x105633E9, 0xD647136D,
|
|
|
721 |
0xD7618C9A, 0xA10C7A37, 0xF8148E59, 0x133C89EB, 0xA927EECE, 0x61C935B7, 0x1CE5EDE1, 0x47B13C7A,
|
|
|
722 |
0xD2DF599C, 0xF2733F55, 0x14CE7918, 0xC737BF73, 0xF7CDEA53, 0xFDAA5B5F, 0x3D6F14DF, 0x44DB8678,
|
|
|
723 |
0xAFF381CA, 0x68C43EB9, 0x24342C38, 0xA3405FC2, 0x1DC37216, 0xE2250CBC, 0x3C498B28, 0x0D9541FF,
|
|
|
724 |
0xA8017139, 0x0CB3DE08, 0xB4E49CD8, 0x56C19064, 0xCB84617B, 0x32B670D5, 0x6C5C7448, 0xB85742D0
|
|
|
725 |
));
|
|
|
726 |
|
|
|
727 |
foreach ($dt3 as $dt3i) {
|
|
|
728 |
$dt0[] = (($dt3i << 24) & 0xFF000000) | (($dt3i >> 8) & 0x00FFFFFF);
|
|
|
729 |
$dt1[] = (($dt3i << 16) & 0xFFFF0000) | (($dt3i >> 16) & 0x0000FFFF);
|
|
|
730 |
$dt2[] = (($dt3i << 8) & 0xFFFFFF00) | (($dt3i >> 24) & 0x000000FF);
|
|
|
731 |
};
|
|
|
732 |
|
|
|
733 |
$tables = array(
|
|
|
734 |
// The Precomputed inverse mixColumns tables dt0 - dt3
|
|
|
735 |
$dt0,
|
|
|
736 |
$dt1,
|
|
|
737 |
$dt2,
|
|
|
738 |
$dt3,
|
|
|
739 |
// The inverse SubByte S-Box
|
|
|
740 |
array(
|
|
|
741 |
0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,
|
|
|
742 |
0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,
|
|
|
743 |
0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
|
|
|
744 |
0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,
|
|
|
745 |
0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,
|
|
|
746 |
0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
|
|
|
747 |
0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,
|
|
|
748 |
0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
|
|
|
749 |
0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
|
|
|
750 |
0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,
|
|
|
751 |
0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,
|
|
|
752 |
0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
|
|
|
753 |
0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
|
|
|
754 |
0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,
|
|
|
755 |
0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
|
|
|
756 |
0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
|
|
|
757 |
)
|
|
|
758 |
);
|
|
|
759 |
}
|
|
|
760 |
return $tables;
|
|
|
761 |
}
|
|
|
762 |
|
|
|
763 |
/**
|
|
|
764 |
* Setup the performance-optimized function for de/encrypt()
|
|
|
765 |
*
|
|
|
766 |
* @see \phpseclib\Crypt\Base::_setupInlineCrypt()
|
|
|
767 |
* @access private
|
|
|
768 |
*/
|
|
|
769 |
function _setupInlineCrypt()
|
|
|
770 |
{
|
|
|
771 |
// Note: _setupInlineCrypt() will be called only if $this->changed === true
|
|
|
772 |
// So here we are'nt under the same heavy timing-stress as we are in _de/encryptBlock() or de/encrypt().
|
|
|
773 |
// However...the here generated function- $code, stored as php callback in $this->inline_crypt, must work as fast as even possible.
|
|
|
774 |
|
|
|
775 |
$lambda_functions =& self::_getLambdaFunctions();
|
|
|
776 |
|
|
|
777 |
// We create max. 10 hi-optimized code for memory reason. Means: For each $key one ultra fast inline-crypt function.
|
|
|
778 |
// (Currently, for Crypt_Rijndael/AES, one generated $lambda_function cost on php5.5@32bit ~80kb unfreeable mem and ~130kb on php5.5@64bit)
|
|
|
779 |
// After that, we'll still create very fast optimized code but not the hi-ultimative code, for each $mode one.
|
|
|
780 |
$gen_hi_opt_code = (bool)(count($lambda_functions) < 10);
|
|
|
781 |
|
|
|
782 |
// Generation of a uniqe hash for our generated code
|
|
|
783 |
$code_hash = "Crypt_Rijndael, {$this->mode}, {$this->Nr}, {$this->Nb}";
|
|
|
784 |
if ($gen_hi_opt_code) {
|
|
|
785 |
$code_hash = str_pad($code_hash, 32) . $this->_hashInlineCryptFunction($this->key);
|
|
|
786 |
}
|
|
|
787 |
|
|
|
788 |
if (!isset($lambda_functions[$code_hash])) {
|
|
|
789 |
switch (true) {
|
|
|
790 |
case $gen_hi_opt_code:
|
|
|
791 |
// The hi-optimized $lambda_functions will use the key-words hardcoded for better performance.
|
|
|
792 |
$w = $this->w;
|
|
|
793 |
$dw = $this->dw;
|
|
|
794 |
$init_encrypt = '';
|
|
|
795 |
$init_decrypt = '';
|
|
|
796 |
break;
|
|
|
797 |
default:
|
|
|
798 |
for ($i = 0, $cw = count($this->w); $i < $cw; ++$i) {
|
|
|
799 |
$w[] = '$w[' . $i . ']';
|
|
|
800 |
$dw[] = '$dw[' . $i . ']';
|
|
|
801 |
}
|
|
|
802 |
$init_encrypt = '$w = $self->w;';
|
|
|
803 |
$init_decrypt = '$dw = $self->dw;';
|
|
|
804 |
}
|
|
|
805 |
|
|
|
806 |
$Nr = $this->Nr;
|
|
|
807 |
$Nb = $this->Nb;
|
|
|
808 |
$c = $this->c;
|
|
|
809 |
|
|
|
810 |
// Generating encrypt code:
|
|
|
811 |
$init_encrypt.= '
|
|
|
812 |
static $tables;
|
|
|
813 |
if (empty($tables)) {
|
|
|
814 |
$tables = &$self->_getTables();
|
|
|
815 |
}
|
|
|
816 |
$t0 = $tables[0];
|
|
|
817 |
$t1 = $tables[1];
|
|
|
818 |
$t2 = $tables[2];
|
|
|
819 |
$t3 = $tables[3];
|
|
|
820 |
$sbox = $tables[4];
|
|
|
821 |
';
|
|
|
822 |
|
|
|
823 |
$s = 'e';
|
|
|
824 |
$e = 's';
|
|
|
825 |
$wc = $Nb - 1;
|
|
|
826 |
|
|
|
827 |
// Preround: addRoundKey
|
|
|
828 |
$encrypt_block = '$in = unpack("N*", $in);'."\n";
|
|
|
829 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
830 |
$encrypt_block .= '$s'.$i.' = $in['.($i + 1).'] ^ '.$w[++$wc].";\n";
|
|
|
831 |
}
|
|
|
832 |
|
|
|
833 |
// Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
|
|
|
834 |
for ($round = 1; $round < $Nr; ++$round) {
|
|
|
835 |
list($s, $e) = array($e, $s);
|
|
|
836 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
837 |
$encrypt_block.=
|
|
|
838 |
'$'.$e.$i.' =
|
|
|
839 |
$t0[($'.$s.$i .' >> 24) & 0xff] ^
|
|
|
840 |
$t1[($'.$s.(($i + $c[1]) % $Nb).' >> 16) & 0xff] ^
|
|
|
841 |
$t2[($'.$s.(($i + $c[2]) % $Nb).' >> 8) & 0xff] ^
|
|
|
842 |
$t3[ $'.$s.(($i + $c[3]) % $Nb).' & 0xff] ^
|
|
|
843 |
'.$w[++$wc].";\n";
|
|
|
844 |
}
|
|
|
845 |
}
|
|
|
846 |
|
|
|
847 |
// Finalround: subWord + shiftRows + addRoundKey
|
|
|
848 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
849 |
$encrypt_block.=
|
|
|
850 |
'$'.$e.$i.' =
|
|
|
851 |
$sbox[ $'.$e.$i.' & 0xff] |
|
|
|
852 |
($sbox[($'.$e.$i.' >> 8) & 0xff] << 8) |
|
|
|
853 |
($sbox[($'.$e.$i.' >> 16) & 0xff] << 16) |
|
|
|
854 |
($sbox[($'.$e.$i.' >> 24) & 0xff] << 24);'."\n";
|
|
|
855 |
}
|
|
|
856 |
$encrypt_block .= '$in = pack("N*"'."\n";
|
|
|
857 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
858 |
$encrypt_block.= ',
|
|
|
859 |
($'.$e.$i .' & '.((int)0xFF000000).') ^
|
|
|
860 |
($'.$e.(($i + $c[1]) % $Nb).' & 0x00FF0000 ) ^
|
|
|
861 |
($'.$e.(($i + $c[2]) % $Nb).' & 0x0000FF00 ) ^
|
|
|
862 |
($'.$e.(($i + $c[3]) % $Nb).' & 0x000000FF ) ^
|
|
|
863 |
'.$w[$i]."\n";
|
|
|
864 |
}
|
|
|
865 |
$encrypt_block .= ');';
|
|
|
866 |
|
|
|
867 |
// Generating decrypt code:
|
|
|
868 |
$init_decrypt.= '
|
|
|
869 |
static $invtables;
|
|
|
870 |
if (empty($invtables)) {
|
|
|
871 |
$invtables = &$self->_getInvTables();
|
|
|
872 |
}
|
|
|
873 |
$dt0 = $invtables[0];
|
|
|
874 |
$dt1 = $invtables[1];
|
|
|
875 |
$dt2 = $invtables[2];
|
|
|
876 |
$dt3 = $invtables[3];
|
|
|
877 |
$isbox = $invtables[4];
|
|
|
878 |
';
|
|
|
879 |
|
|
|
880 |
$s = 'e';
|
|
|
881 |
$e = 's';
|
|
|
882 |
$wc = $Nb - 1;
|
|
|
883 |
|
|
|
884 |
// Preround: addRoundKey
|
|
|
885 |
$decrypt_block = '$in = unpack("N*", $in);'."\n";
|
|
|
886 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
887 |
$decrypt_block .= '$s'.$i.' = $in['.($i + 1).'] ^ '.$dw[++$wc].';'."\n";
|
|
|
888 |
}
|
|
|
889 |
|
|
|
890 |
// Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
|
|
|
891 |
for ($round = 1; $round < $Nr; ++$round) {
|
|
|
892 |
list($s, $e) = array($e, $s);
|
|
|
893 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
894 |
$decrypt_block.=
|
|
|
895 |
'$'.$e.$i.' =
|
|
|
896 |
$dt0[($'.$s.$i .' >> 24) & 0xff] ^
|
|
|
897 |
$dt1[($'.$s.(($Nb + $i - $c[1]) % $Nb).' >> 16) & 0xff] ^
|
|
|
898 |
$dt2[($'.$s.(($Nb + $i - $c[2]) % $Nb).' >> 8) & 0xff] ^
|
|
|
899 |
$dt3[ $'.$s.(($Nb + $i - $c[3]) % $Nb).' & 0xff] ^
|
|
|
900 |
'.$dw[++$wc].";\n";
|
|
|
901 |
}
|
|
|
902 |
}
|
|
|
903 |
|
|
|
904 |
// Finalround: subWord + shiftRows + addRoundKey
|
|
|
905 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
906 |
$decrypt_block.=
|
|
|
907 |
'$'.$e.$i.' =
|
|
|
908 |
$isbox[ $'.$e.$i.' & 0xff] |
|
|
|
909 |
($isbox[($'.$e.$i.' >> 8) & 0xff] << 8) |
|
|
|
910 |
($isbox[($'.$e.$i.' >> 16) & 0xff] << 16) |
|
|
|
911 |
($isbox[($'.$e.$i.' >> 24) & 0xff] << 24);'."\n";
|
|
|
912 |
}
|
|
|
913 |
$decrypt_block .= '$in = pack("N*"'."\n";
|
|
|
914 |
for ($i = 0; $i < $Nb; ++$i) {
|
|
|
915 |
$decrypt_block.= ',
|
|
|
916 |
($'.$e.$i. ' & '.((int)0xFF000000).') ^
|
|
|
917 |
($'.$e.(($Nb + $i - $c[1]) % $Nb).' & 0x00FF0000 ) ^
|
|
|
918 |
($'.$e.(($Nb + $i - $c[2]) % $Nb).' & 0x0000FF00 ) ^
|
|
|
919 |
($'.$e.(($Nb + $i - $c[3]) % $Nb).' & 0x000000FF ) ^
|
|
|
920 |
'.$dw[$i]."\n";
|
|
|
921 |
}
|
|
|
922 |
$decrypt_block .= ');';
|
|
|
923 |
|
|
|
924 |
$lambda_functions[$code_hash] = $this->_createInlineCryptFunction(
|
|
|
925 |
array(
|
|
|
926 |
'init_crypt' => '',
|
|
|
927 |
'init_encrypt' => $init_encrypt,
|
|
|
928 |
'init_decrypt' => $init_decrypt,
|
|
|
929 |
'encrypt_block' => $encrypt_block,
|
|
|
930 |
'decrypt_block' => $decrypt_block
|
|
|
931 |
)
|
|
|
932 |
);
|
|
|
933 |
}
|
|
|
934 |
$this->inline_crypt = $lambda_functions[$code_hash];
|
|
|
935 |
}
|
|
|
936 |
}
|