You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1051 lines
46 KiB
PHP
1051 lines
46 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Pure-PHP implementation of Rijndael.
|
|
*
|
|
* Uses mcrypt, if available/possible, and an internal implementation, otherwise.
|
|
*
|
|
* PHP versions 4 and 5
|
|
*
|
|
* If {@link self::setBlockLength() setBlockLength()} isn't called, it'll be assumed to be 128 bits. If
|
|
* {@link self::setKeyLength() setKeyLength()} isn't called, it'll be calculated from
|
|
* {@link self::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's
|
|
* 136-bits it'll be null-padded to 192-bits and 192 bits will be the key length until
|
|
* {@link self::setKey() setKey()} is called, again, at which point, it'll be recalculated.
|
|
*
|
|
* Not all Rijndael implementations may support 160-bits or 224-bits as the block length / key length. mcrypt, for example,
|
|
* does not. AES, itself, only supports block lengths of 128 and key lengths of 128, 192, and 256.
|
|
* {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=10 Rijndael-ammended.pdf#page=10} defines the
|
|
* algorithm for block lengths of 192 and 256 but not for block lengths / key lengths of 160 and 224. Indeed, 160 and 224
|
|
* are first defined as valid key / block lengths in
|
|
* {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=44 Rijndael-ammended.pdf#page=44}:
|
|
* Extensions: Other block and Cipher Key lengths.
|
|
* Note: Use of 160/224-bit Keys must be explicitly set by setKeyLength(160) respectively setKeyLength(224).
|
|
*
|
|
* {@internal The variable names are the same as those in
|
|
* {@link http://www.csrc.nist.gov/publications/fips/fips197/fips-197.pdf#page=10 fips-197.pdf#page=10}.}}
|
|
*
|
|
* Here's a short example of how to use this library:
|
|
* <code>
|
|
* <?php
|
|
* include 'Crypt/Rijndael.php';
|
|
*
|
|
* $rijndael = new Crypt_Rijndael();
|
|
*
|
|
* $rijndael->setKey('abcdefghijklmnop');
|
|
*
|
|
* $size = 10 * 1024;
|
|
* $plaintext = '';
|
|
* for ($i = 0; $i < $size; $i++) {
|
|
* $plaintext.= 'a';
|
|
* }
|
|
*
|
|
* echo $rijndael->decrypt($rijndael->encrypt($plaintext));
|
|
* ?>
|
|
* </code>
|
|
*
|
|
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
* @category Crypt
|
|
* @package Crypt_Rijndael
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @copyright 2008 Jim Wigginton
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
|
* @link http://phpseclib.sourceforge.net
|
|
*/
|
|
|
|
/**
|
|
* Include Crypt_Base
|
|
*
|
|
* Base cipher class
|
|
*/
|
|
if (!class_exists('Crypt_Base')) {
|
|
include_once 'Base.php';
|
|
}
|
|
|
|
/**#@+
|
|
* @access public
|
|
* @see self::encrypt()
|
|
* @see self::decrypt()
|
|
*/
|
|
/**
|
|
* Encrypt / decrypt using the Counter mode.
|
|
*
|
|
* Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.
|
|
*
|
|
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
|
|
*/
|
|
define('CRYPT_RIJNDAEL_MODE_CTR', CRYPT_MODE_CTR);
|
|
/**
|
|
* Encrypt / decrypt using the Electronic Code Book mode.
|
|
*
|
|
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29
|
|
*/
|
|
define('CRYPT_RIJNDAEL_MODE_ECB', CRYPT_MODE_ECB);
|
|
/**
|
|
* Encrypt / decrypt using the Code Book Chaining mode.
|
|
*
|
|
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29
|
|
*/
|
|
define('CRYPT_RIJNDAEL_MODE_CBC', CRYPT_MODE_CBC);
|
|
/**
|
|
* Encrypt / decrypt using the Cipher Feedback mode.
|
|
*
|
|
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29
|
|
*/
|
|
define('CRYPT_RIJNDAEL_MODE_CFB', CRYPT_MODE_CFB);
|
|
/**
|
|
* Encrypt / decrypt using the Cipher Feedback mode.
|
|
*
|
|
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29
|
|
*/
|
|
define('CRYPT_RIJNDAEL_MODE_OFB', CRYPT_MODE_OFB);
|
|
/**#@-*/
|
|
|
|
/**
|
|
* Pure-PHP implementation of Rijndael.
|
|
*
|
|
* @package Crypt_Rijndael
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @access public
|
|
*/
|
|
class Crypt_Rijndael extends Crypt_Base
|
|
{
|
|
/**
|
|
* The namespace used by the cipher for its constants.
|
|
*
|
|
* @see Crypt_Base::const_namespace
|
|
* @var string
|
|
* @access private
|
|
*/
|
|
var $const_namespace = 'RIJNDAEL';
|
|
|
|
/**
|
|
* The mcrypt specific name of the cipher
|
|
*
|
|
* Mcrypt is useable for 128/192/256-bit $block_size/$key_length. For 160/224 not.
|
|
* Crypt_Rijndael determines automatically whether mcrypt is useable
|
|
* or not for the current $block_size/$key_length.
|
|
* In case of, $cipher_name_mcrypt will be set dynamically at run time accordingly.
|
|
*
|
|
* @see Crypt_Base::cipher_name_mcrypt
|
|
* @see Crypt_Base::engine
|
|
* @see self::isValidEngine()
|
|
* @var string
|
|
* @access private
|
|
*/
|
|
var $cipher_name_mcrypt = 'rijndael-128';
|
|
|
|
/**
|
|
* The default salt used by setPassword()
|
|
*
|
|
* @see Crypt_Base::password_default_salt
|
|
* @see Crypt_Base::setPassword()
|
|
* @var string
|
|
* @access private
|
|
*/
|
|
var $password_default_salt = 'phpseclib';
|
|
|
|
/**
|
|
* The Key Schedule
|
|
*
|
|
* @see self::_setup()
|
|
* @var array
|
|
* @access private
|
|
*/
|
|
var $w;
|
|
|
|
/**
|
|
* The Inverse Key Schedule
|
|
*
|
|
* @see self::_setup()
|
|
* @var array
|
|
* @access private
|
|
*/
|
|
var $dw;
|
|
|
|
/**
|
|
* The Block Length divided by 32
|
|
*
|
|
* @see self::setBlockLength()
|
|
* @var int
|
|
* @access private
|
|
* @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4. Exists in conjunction with $block_size
|
|
* because the encryption / decryption / key schedule creation requires this number and not $block_size. We could
|
|
* derive this from $block_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu
|
|
* of that, we'll just precompute it once.
|
|
*/
|
|
var $Nb = 4;
|
|
|
|
/**
|
|
* The Key Length (in bytes)
|
|
*
|
|
* @see self::setKeyLength()
|
|
* @var int
|
|
* @access private
|
|
* @internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $Nk
|
|
* because the encryption / decryption / key schedule creation requires this number and not $key_length. We could
|
|
* derive this from $key_length or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu
|
|
* of that, we'll just precompute it once.
|
|
*/
|
|
var $key_length = 16;
|
|
|
|
/**
|
|
* The Key Length divided by 32
|
|
*
|
|
* @see self::setKeyLength()
|
|
* @var int
|
|
* @access private
|
|
* @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4
|
|
*/
|
|
var $Nk = 4;
|
|
|
|
/**
|
|
* The Number of Rounds
|
|
*
|
|
* @var int
|
|
* @access private
|
|
* @internal The max value is 14, the min value is 10.
|
|
*/
|
|
var $Nr;
|
|
|
|
/**
|
|
* Shift offsets
|
|
*
|
|
* @var array
|
|
* @access private
|
|
*/
|
|
var $c;
|
|
|
|
/**
|
|
* Holds the last used key- and block_size information
|
|
*
|
|
* @var array
|
|
* @access private
|
|
*/
|
|
var $kl;
|
|
|
|
/**
|
|
* Sets the key.
|
|
*
|
|
* Keys can be of any length. Rijndael, itself, requires the use of a key that's between 128-bits and 256-bits long and
|
|
* whose length is a multiple of 32. If the key is less than 256-bits and the key length isn't set, we round the length
|
|
* up to the closest valid key length, padding $key with null bytes. If the key is more than 256-bits, we trim the
|
|
* excess bits.
|
|
*
|
|
* If the key is not explicitly set, it'll be assumed to be all null bytes.
|
|
*
|
|
* Note: 160/224-bit keys must explicitly set by setKeyLength(), otherwise they will be round/pad up to 192/256 bits.
|
|
*
|
|
* @see Crypt_Base:setKey()
|
|
* @see self::setKeyLength()
|
|
* @access public
|
|
* @param string $key
|
|
*/
|
|
function setKey($key)
|
|
{
|
|
if (!$this->explicit_key_length) {
|
|
$length = strlen($key);
|
|
switch (true) {
|
|
case $length <= 16:
|
|
$this->key_size = 16;
|
|
break;
|
|
case $length <= 20:
|
|
$this->key_size = 20;
|
|
break;
|
|
case $length <= 24:
|
|
$this->key_size = 24;
|
|
break;
|
|
case $length <= 28:
|
|
$this->key_size = 28;
|
|
break;
|
|
default:
|
|
$this->key_size = 32;
|
|
}
|
|
}
|
|
parent::setKey($key);
|
|
}
|
|
|
|
/**
|
|
* Sets the key length
|
|
*
|
|
* Valid key lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to
|
|
* 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount.
|
|
*
|
|
* Note: phpseclib extends Rijndael (and AES) for using 160- and 224-bit keys but they are officially not defined
|
|
* and the most (if not all) implementations are not able using 160/224-bit keys but round/pad them up to
|
|
* 192/256 bits as, for example, mcrypt will do.
|
|
*
|
|
* That said, if you want be compatible with other Rijndael and AES implementations,
|
|
* you should not setKeyLength(160) or setKeyLength(224).
|
|
*
|
|
* Additional: In case of 160- and 224-bit keys, phpseclib will/can, for that reason, not use
|
|
* the mcrypt php extension, even if available.
|
|
* This results then in slower encryption.
|
|
*
|
|
* @access public
|
|
* @param int $length
|
|
*/
|
|
function setKeyLength($length)
|
|
{
|
|
switch (true) {
|
|
case $length <= 128:
|
|
$this->key_length = 16;
|
|
break;
|
|
case $length <= 160:
|
|
$this->key_length = 20;
|
|
break;
|
|
case $length <= 192:
|
|
$this->key_length = 24;
|
|
break;
|
|
case $length <= 224:
|
|
$this->key_length = 28;
|
|
break;
|
|
default:
|
|
$this->key_length = 32;
|
|
}
|
|
|
|
parent::setKeyLength($length);
|
|
}
|
|
|
|
/**
|
|
* Sets the block length
|
|
*
|
|
* Valid block lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to
|
|
* 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount.
|
|
*
|
|
* @access public
|
|
* @param int $length
|
|
*/
|
|
function setBlockLength($length)
|
|
{
|
|
$length >>= 5;
|
|
if ($length > 8) {
|
|
$length = 8;
|
|
} elseif ($length < 4) {
|
|
$length = 4;
|
|
}
|
|
$this->Nb = $length;
|
|
$this->block_size = $length << 2;
|
|
$this->changed = true;
|
|
$this->_setEngine();
|
|
}
|
|
|
|
/**
|
|
* Test for engine validity
|
|
*
|
|
* This is mainly just a wrapper to set things up for Crypt_Base::isValidEngine()
|
|
*
|
|
* @see Crypt_Base::Crypt_Base()
|
|
* @param int $engine
|
|
* @access public
|
|
* @return bool
|
|
*/
|
|
function isValidEngine($engine)
|
|
{
|
|
switch ($engine) {
|
|
case CRYPT_ENGINE_OPENSSL:
|
|
if ($this->block_size != 16) {
|
|
return false;
|
|
}
|
|
$this->cipher_name_openssl_ecb = 'aes-' . ($this->key_length << 3) . '-ecb';
|
|
$this->cipher_name_openssl = 'aes-' . ($this->key_length << 3) . '-' . $this->_openssl_translate_mode();
|
|
break;
|
|
case CRYPT_ENGINE_MCRYPT:
|
|
$this->cipher_name_mcrypt = 'rijndael-' . ($this->block_size << 3);
|
|
if ($this->key_length % 8) { // is it a 160/224-bit key?
|
|
// mcrypt is not usable for them, only for 128/192/256-bit keys
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return parent::isValidEngine($engine);
|
|
}
|
|
|
|
/**
|
|
* Encrypts a block
|
|
*
|
|
* @access private
|
|
* @param string $in
|
|
* @return string
|
|
*/
|
|
function _encryptBlock($in)
|
|
{
|
|
static $tables;
|
|
if (empty($tables)) {
|
|
$tables = &$this->_getTables();
|
|
}
|
|
$t0 = $tables[0];
|
|
$t1 = $tables[1];
|
|
$t2 = $tables[2];
|
|
$t3 = $tables[3];
|
|
$sbox = $tables[4];
|
|
|
|
$state = array();
|
|
$words = unpack('N*', $in);
|
|
|
|
$c = $this->c;
|
|
$w = $this->w;
|
|
$Nb = $this->Nb;
|
|
$Nr = $this->Nr;
|
|
|
|
// addRoundKey
|
|
$wc = $Nb - 1;
|
|
foreach ($words as $word) {
|
|
$state[] = $word ^ $w[++$wc];
|
|
}
|
|
|
|
// fips-197.pdf#page=19, "Figure 5. Pseudo Code for the Cipher", states that this loop has four components -
|
|
// subBytes, shiftRows, mixColumns, and addRoundKey. fips-197.pdf#page=30, "Implementation Suggestions Regarding
|
|
// Various Platforms" suggests that performs enhanced implementations are described in Rijndael-ammended.pdf.
|
|
// Rijndael-ammended.pdf#page=20, "Implementation aspects / 32-bit processor", discusses such an optimization.
|
|
// Unfortunately, the description given there is not quite correct. Per aes.spec.v316.pdf#page=19 [1],
|
|
// equation (7.4.7) is supposed to use addition instead of subtraction, so we'll do that here, as well.
|
|
|
|
// [1] http://fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.v316.pdf
|
|
$temp = array();
|
|
for ($round = 1; $round < $Nr; ++$round) {
|
|
$i = 0; // $c[0] == 0
|
|
$j = $c[1];
|
|
$k = $c[2];
|
|
$l = $c[3];
|
|
|
|
while ($i < $Nb) {
|
|
$temp[$i] = $t0[$state[$i] >> 24 & 0x000000FF] ^
|
|
$t1[$state[$j] >> 16 & 0x000000FF] ^
|
|
$t2[$state[$k] >> 8 & 0x000000FF] ^
|
|
$t3[$state[$l] & 0x000000FF] ^
|
|
$w[++$wc];
|
|
++$i;
|
|
$j = ($j + 1) % $Nb;
|
|
$k = ($k + 1) % $Nb;
|
|
$l = ($l + 1) % $Nb;
|
|
}
|
|
$state = $temp;
|
|
}
|
|
|
|
// subWord
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$state[$i] = $sbox[$state[$i] & 0x000000FF] |
|
|
($sbox[$state[$i] >> 8 & 0x000000FF] << 8) |
|
|
($sbox[$state[$i] >> 16 & 0x000000FF] << 16) |
|
|
($sbox[$state[$i] >> 24 & 0x000000FF] << 24);
|
|
}
|
|
|
|
// shiftRows + addRoundKey
|
|
$i = 0; // $c[0] == 0
|
|
$j = $c[1];
|
|
$k = $c[2];
|
|
$l = $c[3];
|
|
while ($i < $Nb) {
|
|
$temp[$i] = ($state[$i] & 0xFF000000) ^
|
|
($state[$j] & 0x00FF0000) ^
|
|
($state[$k] & 0x0000FF00) ^
|
|
($state[$l] & 0x000000FF) ^
|
|
$w[$i];
|
|
++$i;
|
|
$j = ($j + 1) % $Nb;
|
|
$k = ($k + 1) % $Nb;
|
|
$l = ($l + 1) % $Nb;
|
|
}
|
|
|
|
switch ($Nb) {
|
|
case 8:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]);
|
|
case 7:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]);
|
|
case 6:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]);
|
|
case 5:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]);
|
|
default:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Decrypts a block
|
|
*
|
|
* @access private
|
|
* @param string $in
|
|
* @return string
|
|
*/
|
|
function _decryptBlock($in)
|
|
{
|
|
static $invtables;
|
|
if (empty($invtables)) {
|
|
$invtables = &$this->_getInvTables();
|
|
}
|
|
$dt0 = $invtables[0];
|
|
$dt1 = $invtables[1];
|
|
$dt2 = $invtables[2];
|
|
$dt3 = $invtables[3];
|
|
$isbox = $invtables[4];
|
|
|
|
$state = array();
|
|
$words = unpack('N*', $in);
|
|
|
|
$c = $this->c;
|
|
$dw = $this->dw;
|
|
$Nb = $this->Nb;
|
|
$Nr = $this->Nr;
|
|
|
|
// addRoundKey
|
|
$wc = $Nb - 1;
|
|
foreach ($words as $word) {
|
|
$state[] = $word ^ $dw[++$wc];
|
|
}
|
|
|
|
$temp = array();
|
|
for ($round = $Nr - 1; $round > 0; --$round) {
|
|
$i = 0; // $c[0] == 0
|
|
$j = $Nb - $c[1];
|
|
$k = $Nb - $c[2];
|
|
$l = $Nb - $c[3];
|
|
|
|
while ($i < $Nb) {
|
|
$temp[$i] = $dt0[$state[$i] >> 24 & 0x000000FF] ^
|
|
$dt1[$state[$j] >> 16 & 0x000000FF] ^
|
|
$dt2[$state[$k] >> 8 & 0x000000FF] ^
|
|
$dt3[$state[$l] & 0x000000FF] ^
|
|
$dw[++$wc];
|
|
++$i;
|
|
$j = ($j + 1) % $Nb;
|
|
$k = ($k + 1) % $Nb;
|
|
$l = ($l + 1) % $Nb;
|
|
}
|
|
$state = $temp;
|
|
}
|
|
|
|
// invShiftRows + invSubWord + addRoundKey
|
|
$i = 0; // $c[0] == 0
|
|
$j = $Nb - $c[1];
|
|
$k = $Nb - $c[2];
|
|
$l = $Nb - $c[3];
|
|
|
|
while ($i < $Nb) {
|
|
$word = ($state[$i] & 0xFF000000) |
|
|
($state[$j] & 0x00FF0000) |
|
|
($state[$k] & 0x0000FF00) |
|
|
($state[$l] & 0x000000FF);
|
|
|
|
$temp[$i] = $dw[$i] ^ ($isbox[$word & 0x000000FF] |
|
|
($isbox[$word >> 8 & 0x000000FF] << 8) |
|
|
($isbox[$word >> 16 & 0x000000FF] << 16) |
|
|
($isbox[$word >> 24 & 0x000000FF] << 24));
|
|
++$i;
|
|
$j = ($j + 1) % $Nb;
|
|
$k = ($k + 1) % $Nb;
|
|
$l = ($l + 1) % $Nb;
|
|
}
|
|
|
|
switch ($Nb) {
|
|
case 8:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]);
|
|
case 7:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]);
|
|
case 6:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]);
|
|
case 5:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]);
|
|
default:
|
|
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Setup the key (expansion)
|
|
*
|
|
* @see Crypt_Base::_setupKey()
|
|
* @access private
|
|
*/
|
|
function _setupKey()
|
|
{
|
|
// Each number in $rcon is equal to the previous number multiplied by two in Rijndael's finite field.
|
|
// See http://en.wikipedia.org/wiki/Finite_field_arithmetic#Multiplicative_inverse
|
|
static $rcon = array(0,
|
|
0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
|
|
0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000,
|
|
0x6C000000, 0xD8000000, 0xAB000000, 0x4D000000, 0x9A000000,
|
|
0x2F000000, 0x5E000000, 0xBC000000, 0x63000000, 0xC6000000,
|
|
0x97000000, 0x35000000, 0x6A000000, 0xD4000000, 0xB3000000,
|
|
0x7D000000, 0xFA000000, 0xEF000000, 0xC5000000, 0x91000000
|
|
);
|
|
|
|
if (isset($this->kl['key']) && $this->key === $this->kl['key'] && $this->key_length === $this->kl['key_length'] && $this->block_size === $this->kl['block_size']) {
|
|
// already expanded
|
|
return;
|
|
}
|
|
$this->kl = array('key' => $this->key, 'key_length' => $this->key_length, 'block_size' => $this->block_size);
|
|
|
|
$this->Nk = $this->key_length >> 2;
|
|
// see Rijndael-ammended.pdf#page=44
|
|
$this->Nr = max($this->Nk, $this->Nb) + 6;
|
|
|
|
// shift offsets for Nb = 5, 7 are defined in Rijndael-ammended.pdf#page=44,
|
|
// "Table 8: Shift offsets in Shiftrow for the alternative block lengths"
|
|
// shift offsets for Nb = 4, 6, 8 are defined in Rijndael-ammended.pdf#page=14,
|
|
// "Table 2: Shift offsets for different block lengths"
|
|
switch ($this->Nb) {
|
|
case 4:
|
|
case 5:
|
|
case 6:
|
|
$this->c = array(0, 1, 2, 3);
|
|
break;
|
|
case 7:
|
|
$this->c = array(0, 1, 2, 4);
|
|
break;
|
|
case 8:
|
|
$this->c = array(0, 1, 3, 4);
|
|
}
|
|
|
|
$w = array_values(unpack('N*words', $this->key));
|
|
|
|
$length = $this->Nb * ($this->Nr + 1);
|
|
for ($i = $this->Nk; $i < $length; $i++) {
|
|
$temp = $w[$i - 1];
|
|
if ($i % $this->Nk == 0) {
|
|
// according to <http://php.net/language.types.integer>, "the size of an integer is platform-dependent".
|
|
// on a 32-bit machine, it's 32-bits, and on a 64-bit machine, it's 64-bits. on a 32-bit machine,
|
|
// 0xFFFFFFFF << 8 == 0xFFFFFF00, but on a 64-bit machine, it equals 0xFFFFFFFF00. as such, doing 'and'
|
|
// with 0xFFFFFFFF (or 0xFFFFFF00) on a 32-bit machine is unnecessary, but on a 64-bit machine, it is.
|
|
$temp = (($temp << 8) & 0xFFFFFF00) | (($temp >> 24) & 0x000000FF); // rotWord
|
|
$temp = $this->_subWord($temp) ^ $rcon[$i / $this->Nk];
|
|
} elseif ($this->Nk > 6 && $i % $this->Nk == 4) {
|
|
$temp = $this->_subWord($temp);
|
|
}
|
|
$w[$i] = $w[$i - $this->Nk] ^ $temp;
|
|
}
|
|
|
|
// convert the key schedule from a vector of $Nb * ($Nr + 1) length to a matrix with $Nr + 1 rows and $Nb columns
|
|
// and generate the inverse key schedule. more specifically,
|
|
// according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=23> (section 5.3.3),
|
|
// "The key expansion for the Inverse Cipher is defined as follows:
|
|
// 1. Apply the Key Expansion.
|
|
// 2. Apply InvMixColumn to all Round Keys except the first and the last one."
|
|
// also, see fips-197.pdf#page=27, "5.3.5 Equivalent Inverse Cipher"
|
|
list($dt0, $dt1, $dt2, $dt3) = $this->_getInvTables();
|
|
$temp = $this->w = $this->dw = array();
|
|
for ($i = $row = $col = 0; $i < $length; $i++, $col++) {
|
|
if ($col == $this->Nb) {
|
|
if ($row == 0) {
|
|
$this->dw[0] = $this->w[0];
|
|
} else {
|
|
// subWord + invMixColumn + invSubWord = invMixColumn
|
|
$j = 0;
|
|
while ($j < $this->Nb) {
|
|
$dw = $this->_subWord($this->w[$row][$j]);
|
|
$temp[$j] = $dt0[$dw >> 24 & 0x000000FF] ^
|
|
$dt1[$dw >> 16 & 0x000000FF] ^
|
|
$dt2[$dw >> 8 & 0x000000FF] ^
|
|
$dt3[$dw & 0x000000FF];
|
|
$j++;
|
|
}
|
|
$this->dw[$row] = $temp;
|
|
}
|
|
|
|
$col = 0;
|
|
$row++;
|
|
}
|
|
$this->w[$row][$col] = $w[$i];
|
|
}
|
|
|
|
$this->dw[$row] = $this->w[$row];
|
|
|
|
// Converting to 1-dim key arrays (both ascending)
|
|
$this->dw = array_reverse($this->dw);
|
|
$w = array_pop($this->w);
|
|
$dw = array_pop($this->dw);
|
|
foreach ($this->w as $r => $wr) {
|
|
foreach ($wr as $c => $wc) {
|
|
$w[] = $wc;
|
|
$dw[] = $this->dw[$r][$c];
|
|
}
|
|
}
|
|
$this->w = $w;
|
|
$this->dw = $dw;
|
|
}
|
|
|
|
/**
|
|
* Performs S-Box substitutions
|
|
*
|
|
* @access private
|
|
* @param int $word
|
|
*/
|
|
function _subWord($word)
|
|
{
|
|
static $sbox;
|
|
if (empty($sbox)) {
|
|
list(, , , , $sbox) = $this->_getTables();
|
|
}
|
|
|
|
return $sbox[$word & 0x000000FF] |
|
|
($sbox[$word >> 8 & 0x000000FF] << 8) |
|
|
($sbox[$word >> 16 & 0x000000FF] << 16) |
|
|
($sbox[$word >> 24 & 0x000000FF] << 24);
|
|
}
|
|
|
|
/**
|
|
* Provides the mixColumns and sboxes tables
|
|
*
|
|
* @see Crypt_Rijndael:_encryptBlock()
|
|
* @see Crypt_Rijndael:_setupInlineCrypt()
|
|
* @see Crypt_Rijndael:_subWord()
|
|
* @access private
|
|
* @return array &$tables
|
|
*/
|
|
function &_getTables()
|
|
{
|
|
static $tables;
|
|
if (empty($tables)) {
|
|
// according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=19> (section 5.2.1),
|
|
// precomputed tables can be used in the mixColumns phase. in that example, they're assigned t0...t3, so
|
|
// those are the names we'll use.
|
|
$t3 = array_map('intval', array(
|
|
// with array_map('intval', ...) we ensure we have only int's and not
|
|
// some slower floats converted by php automatically on high values
|
|
0x6363A5C6, 0x7C7C84F8, 0x777799EE, 0x7B7B8DF6, 0xF2F20DFF, 0x6B6BBDD6, 0x6F6FB1DE, 0xC5C55491,
|
|
0x30305060, 0x01010302, 0x6767A9CE, 0x2B2B7D56, 0xFEFE19E7, 0xD7D762B5, 0xABABE64D, 0x76769AEC,
|
|
0xCACA458F, 0x82829D1F, 0xC9C94089, 0x7D7D87FA, 0xFAFA15EF, 0x5959EBB2, 0x4747C98E, 0xF0F00BFB,
|
|
0xADADEC41, 0xD4D467B3, 0xA2A2FD5F, 0xAFAFEA45, 0x9C9CBF23, 0xA4A4F753, 0x727296E4, 0xC0C05B9B,
|
|
0xB7B7C275, 0xFDFD1CE1, 0x9393AE3D, 0x26266A4C, 0x36365A6C, 0x3F3F417E, 0xF7F702F5, 0xCCCC4F83,
|
|
0x34345C68, 0xA5A5F451, 0xE5E534D1, 0xF1F108F9, 0x717193E2, 0xD8D873AB, 0x31315362, 0x15153F2A,
|
|
0x04040C08, 0xC7C75295, 0x23236546, 0xC3C35E9D, 0x18182830, 0x9696A137, 0x05050F0A, 0x9A9AB52F,
|
|
0x0707090E, 0x12123624, 0x80809B1B, 0xE2E23DDF, 0xEBEB26CD, 0x2727694E, 0xB2B2CD7F, 0x75759FEA,
|
|
0x09091B12, 0x83839E1D, 0x2C2C7458, 0x1A1A2E34, 0x1B1B2D36, 0x6E6EB2DC, 0x5A5AEEB4, 0xA0A0FB5B,
|
|
0x5252F6A4, 0x3B3B4D76, 0xD6D661B7, 0xB3B3CE7D, 0x29297B52, 0xE3E33EDD, 0x2F2F715E, 0x84849713,
|
|
0x5353F5A6, 0xD1D168B9, 0x00000000, 0xEDED2CC1, 0x20206040, 0xFCFC1FE3, 0xB1B1C879, 0x5B5BEDB6,
|
|
0x6A6ABED4, 0xCBCB468D, 0xBEBED967, 0x39394B72, 0x4A4ADE94, 0x4C4CD498, 0x5858E8B0, 0xCFCF4A85,
|
|
0xD0D06BBB, 0xEFEF2AC5, 0xAAAAE54F, 0xFBFB16ED, 0x4343C586, 0x4D4DD79A, 0x33335566, 0x85859411,
|
|
0x4545CF8A, 0xF9F910E9, 0x02020604, 0x7F7F81FE, 0x5050F0A0, 0x3C3C4478, 0x9F9FBA25, 0xA8A8E34B,
|
|
0x5151F3A2, 0xA3A3FE5D, 0x4040C080, 0x8F8F8A05, 0x9292AD3F, 0x9D9DBC21, 0x38384870, 0xF5F504F1,
|
|
0xBCBCDF63, 0xB6B6C177, 0xDADA75AF, 0x21216342, 0x10103020, 0xFFFF1AE5, 0xF3F30EFD, 0xD2D26DBF,
|
|
0xCDCD4C81, 0x0C0C1418, 0x13133526, 0xECEC2FC3, 0x5F5FE1BE, 0x9797A235, 0x4444CC88, 0x1717392E,
|
|
0xC4C45793, 0xA7A7F255, 0x7E7E82FC, 0x3D3D477A, 0x6464ACC8, 0x5D5DE7BA, 0x19192B32, 0x737395E6,
|
|
0x6060A0C0, 0x81819819, 0x4F4FD19E, 0xDCDC7FA3, 0x22226644, 0x2A2A7E54, 0x9090AB3B, 0x8888830B,
|
|
0x4646CA8C, 0xEEEE29C7, 0xB8B8D36B, 0x14143C28, 0xDEDE79A7, 0x5E5EE2BC, 0x0B0B1D16, 0xDBDB76AD,
|
|
0xE0E03BDB, 0x32325664, 0x3A3A4E74, 0x0A0A1E14, 0x4949DB92, 0x06060A0C, 0x24246C48, 0x5C5CE4B8,
|
|
0xC2C25D9F, 0xD3D36EBD, 0xACACEF43, 0x6262A6C4, 0x9191A839, 0x9595A431, 0xE4E437D3, 0x79798BF2,
|
|
0xE7E732D5, 0xC8C8438B, 0x3737596E, 0x6D6DB7DA, 0x8D8D8C01, 0xD5D564B1, 0x4E4ED29C, 0xA9A9E049,
|
|
0x6C6CB4D8, 0x5656FAAC, 0xF4F407F3, 0xEAEA25CF, 0x6565AFCA, 0x7A7A8EF4, 0xAEAEE947, 0x08081810,
|
|
0xBABAD56F, 0x787888F0, 0x25256F4A, 0x2E2E725C, 0x1C1C2438, 0xA6A6F157, 0xB4B4C773, 0xC6C65197,
|
|
0xE8E823CB, 0xDDDD7CA1, 0x74749CE8, 0x1F1F213E, 0x4B4BDD96, 0xBDBDDC61, 0x8B8B860D, 0x8A8A850F,
|
|
0x707090E0, 0x3E3E427C, 0xB5B5C471, 0x6666AACC, 0x4848D890, 0x03030506, 0xF6F601F7, 0x0E0E121C,
|
|
0x6161A3C2, 0x35355F6A, 0x5757F9AE, 0xB9B9D069, 0x86869117, 0xC1C15899, 0x1D1D273A, 0x9E9EB927,
|
|
0xE1E138D9, 0xF8F813EB, 0x9898B32B, 0x11113322, 0x6969BBD2, 0xD9D970A9, 0x8E8E8907, 0x9494A733,
|
|
0x9B9BB62D, 0x1E1E223C, 0x87879215, 0xE9E920C9, 0xCECE4987, 0x5555FFAA, 0x28287850, 0xDFDF7AA5,
|
|
0x8C8C8F03, 0xA1A1F859, 0x89898009, 0x0D0D171A, 0xBFBFDA65, 0xE6E631D7, 0x4242C684, 0x6868B8D0,
|
|
0x4141C382, 0x9999B029, 0x2D2D775A, 0x0F0F111E, 0xB0B0CB7B, 0x5454FCA8, 0xBBBBD66D, 0x16163A2C
|
|
));
|
|
|
|
foreach ($t3 as $t3i) {
|
|
$t0[] = (($t3i << 24) & 0xFF000000) | (($t3i >> 8) & 0x00FFFFFF);
|
|
$t1[] = (($t3i << 16) & 0xFFFF0000) | (($t3i >> 16) & 0x0000FFFF);
|
|
$t2[] = (($t3i << 8) & 0xFFFFFF00) | (($t3i >> 24) & 0x000000FF);
|
|
}
|
|
|
|
$tables = array(
|
|
// The Precomputed mixColumns tables t0 - t3
|
|
$t0,
|
|
$t1,
|
|
$t2,
|
|
$t3,
|
|
// The SubByte S-Box
|
|
array(
|
|
0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
|
|
0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
|
|
0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
|
|
0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
|
|
0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
|
|
0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
|
|
0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
|
|
0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
|
|
0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
|
|
0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
|
|
0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
|
|
0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
|
|
0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
|
|
0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
|
|
0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
|
|
0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
|
|
)
|
|
);
|
|
}
|
|
return $tables;
|
|
}
|
|
|
|
/**
|
|
* Provides the inverse mixColumns and inverse sboxes tables
|
|
*
|
|
* @see Crypt_Rijndael:_decryptBlock()
|
|
* @see Crypt_Rijndael:_setupInlineCrypt()
|
|
* @see Crypt_Rijndael:_setupKey()
|
|
* @access private
|
|
* @return array &$tables
|
|
*/
|
|
function &_getInvTables()
|
|
{
|
|
static $tables;
|
|
if (empty($tables)) {
|
|
$dt3 = array_map('intval', array(
|
|
0xF4A75051, 0x4165537E, 0x17A4C31A, 0x275E963A, 0xAB6BCB3B, 0x9D45F11F, 0xFA58ABAC, 0xE303934B,
|
|
0x30FA5520, 0x766DF6AD, 0xCC769188, 0x024C25F5, 0xE5D7FC4F, 0x2ACBD7C5, 0x35448026, 0x62A38FB5,
|
|
0xB15A49DE, 0xBA1B6725, 0xEA0E9845, 0xFEC0E15D, 0x2F7502C3, 0x4CF01281, 0x4697A38D, 0xD3F9C66B,
|
|
0x8F5FE703, 0x929C9515, 0x6D7AEBBF, 0x5259DA95, 0xBE832DD4, 0x7421D358, 0xE0692949, 0xC9C8448E,
|
|
0xC2896A75, 0x8E7978F4, 0x583E6B99, 0xB971DD27, 0xE14FB6BE, 0x88AD17F0, 0x20AC66C9, 0xCE3AB47D,
|
|
0xDF4A1863, 0x1A3182E5, 0x51336097, 0x537F4562, 0x6477E0B1, 0x6BAE84BB, 0x81A01CFE, 0x082B94F9,
|
|
0x48685870, 0x45FD198F, 0xDE6C8794, 0x7BF8B752, 0x73D323AB, 0x4B02E272, 0x1F8F57E3, 0x55AB2A66,
|
|
0xEB2807B2, 0xB5C2032F, 0xC57B9A86, 0x3708A5D3, 0x2887F230, 0xBFA5B223, 0x036ABA02, 0x16825CED,
|
|
0xCF1C2B8A, 0x79B492A7, 0x07F2F0F3, 0x69E2A14E, 0xDAF4CD65, 0x05BED506, 0x34621FD1, 0xA6FE8AC4,
|
|
0x2E539D34, 0xF355A0A2, 0x8AE13205, 0xF6EB75A4, 0x83EC390B, 0x60EFAA40, 0x719F065E, 0x6E1051BD,
|
|
0x218AF93E, 0xDD063D96, 0x3E05AEDD, 0xE6BD464D, 0x548DB591, 0xC45D0571, 0x06D46F04, 0x5015FF60,
|
|
0x98FB2419, 0xBDE997D6, 0x4043CC89, 0xD99E7767, 0xE842BDB0, 0x898B8807, 0x195B38E7, 0xC8EEDB79,
|
|
0x7C0A47A1, 0x420FE97C, 0x841EC9F8, 0x00000000, 0x80868309, 0x2BED4832, 0x1170AC1E, 0x5A724E6C,
|
|
0x0EFFFBFD, 0x8538560F, 0xAED51E3D, 0x2D392736, 0x0FD9640A, 0x5CA62168, 0x5B54D19B, 0x362E3A24,
|
|
0x0A67B10C, 0x57E70F93, 0xEE96D2B4, 0x9B919E1B, 0xC0C54F80, 0xDC20A261, 0x774B695A, 0x121A161C,
|
|
0x93BA0AE2, 0xA02AE5C0, 0x22E0433C, 0x1B171D12, 0x090D0B0E, 0x8BC7ADF2, 0xB6A8B92D, 0x1EA9C814,
|
|
0xF1198557, 0x75074CAF, 0x99DDBBEE, 0x7F60FDA3, 0x01269FF7, 0x72F5BC5C, 0x663BC544, 0xFB7E345B,
|
|
0x4329768B, 0x23C6DCCB, 0xEDFC68B6, 0xE4F163B8, 0x31DCCAD7, 0x63851042, 0x97224013, 0xC6112084,
|
|
0x4A247D85, 0xBB3DF8D2, 0xF93211AE, 0x29A16DC7, 0x9E2F4B1D, 0xB230F3DC, 0x8652EC0D, 0xC1E3D077,
|
|
0xB3166C2B, 0x70B999A9, 0x9448FA11, 0xE9642247, 0xFC8CC4A8, 0xF03F1AA0, 0x7D2CD856, 0x3390EF22,
|
|
0x494EC787, 0x38D1C1D9, 0xCAA2FE8C, 0xD40B3698, 0xF581CFA6, 0x7ADE28A5, 0xB78E26DA, 0xADBFA43F,
|
|
0x3A9DE42C, 0x78920D50, 0x5FCC9B6A, 0x7E466254, 0x8D13C2F6, 0xD8B8E890, 0x39F75E2E, 0xC3AFF582,
|
|
0x5D80BE9F, 0xD0937C69, 0xD52DA96F, 0x2512B3CF, 0xAC993BC8, 0x187DA710, 0x9C636EE8, 0x3BBB7BDB,
|
|
0x267809CD, 0x5918F46E, 0x9AB701EC, 0x4F9AA883, 0x956E65E6, 0xFFE67EAA, 0xBCCF0821, 0x15E8E6EF,
|
|
0xE79BD9BA, 0x6F36CE4A, 0x9F09D4EA, 0xB07CD629, 0xA4B2AF31, 0x3F23312A, 0xA59430C6, 0xA266C035,
|
|
0x4EBC3774, 0x82CAA6FC, 0x90D0B0E0, 0xA7D81533, 0x04984AF1, 0xECDAF741, 0xCD500E7F, 0x91F62F17,
|
|
0x4DD68D76, 0xEFB04D43, 0xAA4D54CC, 0x9604DFE4, 0xD1B5E39E, 0x6A881B4C, 0x2C1FB8C1, 0x65517F46,
|
|
0x5EEA049D, 0x8C355D01, 0x877473FA, 0x0B412EFB, 0x671D5AB3, 0xDBD25292, 0x105633E9, 0xD647136D,
|
|
0xD7618C9A, 0xA10C7A37, 0xF8148E59, 0x133C89EB, 0xA927EECE, 0x61C935B7, 0x1CE5EDE1, 0x47B13C7A,
|
|
0xD2DF599C, 0xF2733F55, 0x14CE7918, 0xC737BF73, 0xF7CDEA53, 0xFDAA5B5F, 0x3D6F14DF, 0x44DB8678,
|
|
0xAFF381CA, 0x68C43EB9, 0x24342C38, 0xA3405FC2, 0x1DC37216, 0xE2250CBC, 0x3C498B28, 0x0D9541FF,
|
|
0xA8017139, 0x0CB3DE08, 0xB4E49CD8, 0x56C19064, 0xCB84617B, 0x32B670D5, 0x6C5C7448, 0xB85742D0
|
|
));
|
|
|
|
foreach ($dt3 as $dt3i) {
|
|
$dt0[] = (($dt3i << 24) & 0xFF000000) | (($dt3i >> 8) & 0x00FFFFFF);
|
|
$dt1[] = (($dt3i << 16) & 0xFFFF0000) | (($dt3i >> 16) & 0x0000FFFF);
|
|
$dt2[] = (($dt3i << 8) & 0xFFFFFF00) | (($dt3i >> 24) & 0x000000FF);
|
|
};
|
|
|
|
$tables = array(
|
|
// The Precomputed inverse mixColumns tables dt0 - dt3
|
|
$dt0,
|
|
$dt1,
|
|
$dt2,
|
|
$dt3,
|
|
// The inverse SubByte S-Box
|
|
array(
|
|
0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,
|
|
0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,
|
|
0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
|
|
0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,
|
|
0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,
|
|
0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
|
|
0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,
|
|
0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
|
|
0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
|
|
0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,
|
|
0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,
|
|
0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
|
|
0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
|
|
0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,
|
|
0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
|
|
0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
|
|
)
|
|
);
|
|
}
|
|
return $tables;
|
|
}
|
|
|
|
/**
|
|
* Setup the performance-optimized function for de/encrypt()
|
|
*
|
|
* @see Crypt_Base::_setupInlineCrypt()
|
|
* @access private
|
|
*/
|
|
function _setupInlineCrypt()
|
|
{
|
|
// Note: _setupInlineCrypt() will be called only if $this->changed === true
|
|
// So here we are'nt under the same heavy timing-stress as we are in _de/encryptBlock() or de/encrypt().
|
|
// However...the here generated function- $code, stored as php callback in $this->inline_crypt, must work as fast as even possible.
|
|
|
|
$lambda_functions =& Crypt_Rijndael::_getLambdaFunctions();
|
|
|
|
// We create max. 10 hi-optimized code for memory reason. Means: For each $key one ultra fast inline-crypt function.
|
|
// (Currently, for Crypt_Rijndael/AES, one generated $lambda_function cost on php5.5@32bit ~80kb unfreeable mem and ~130kb on php5.5@64bit)
|
|
// After that, we'll still create very fast optimized code but not the hi-ultimative code, for each $mode one.
|
|
$gen_hi_opt_code = (bool)(count($lambda_functions) < 10);
|
|
|
|
// Generation of a uniqe hash for our generated code
|
|
$code_hash = "Crypt_Rijndael, {$this->mode}, {$this->Nr}, {$this->Nb}";
|
|
if ($gen_hi_opt_code) {
|
|
$code_hash = str_pad($code_hash, 32) . $this->_hashInlineCryptFunction($this->key);
|
|
}
|
|
|
|
if (!isset($lambda_functions[$code_hash])) {
|
|
switch (true) {
|
|
case $gen_hi_opt_code:
|
|
// The hi-optimized $lambda_functions will use the key-words hardcoded for better performance.
|
|
$w = $this->w;
|
|
$dw = $this->dw;
|
|
$init_encrypt = '';
|
|
$init_decrypt = '';
|
|
break;
|
|
default:
|
|
for ($i = 0, $cw = count($this->w); $i < $cw; ++$i) {
|
|
$w[] = '$w[' . $i . ']';
|
|
$dw[] = '$dw[' . $i . ']';
|
|
}
|
|
$init_encrypt = '$w = $self->w;';
|
|
$init_decrypt = '$dw = $self->dw;';
|
|
}
|
|
|
|
$Nr = $this->Nr;
|
|
$Nb = $this->Nb;
|
|
$c = $this->c;
|
|
|
|
// Generating encrypt code:
|
|
$init_encrypt.= '
|
|
static $tables;
|
|
if (empty($tables)) {
|
|
$tables = &$self->_getTables();
|
|
}
|
|
$t0 = $tables[0];
|
|
$t1 = $tables[1];
|
|
$t2 = $tables[2];
|
|
$t3 = $tables[3];
|
|
$sbox = $tables[4];
|
|
';
|
|
|
|
$s = 'e';
|
|
$e = 's';
|
|
$wc = $Nb - 1;
|
|
|
|
// Preround: addRoundKey
|
|
$encrypt_block = '$in = unpack("N*", $in);'."\n";
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$encrypt_block .= '$s'.$i.' = $in['.($i + 1).'] ^ '.$w[++$wc].";\n";
|
|
}
|
|
|
|
// Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
|
|
for ($round = 1; $round < $Nr; ++$round) {
|
|
list($s, $e) = array($e, $s);
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$encrypt_block.=
|
|
'$'.$e.$i.' =
|
|
$t0[($'.$s.$i .' >> 24) & 0xff] ^
|
|
$t1[($'.$s.(($i + $c[1]) % $Nb).' >> 16) & 0xff] ^
|
|
$t2[($'.$s.(($i + $c[2]) % $Nb).' >> 8) & 0xff] ^
|
|
$t3[ $'.$s.(($i + $c[3]) % $Nb).' & 0xff] ^
|
|
'.$w[++$wc].";\n";
|
|
}
|
|
}
|
|
|
|
// Finalround: subWord + shiftRows + addRoundKey
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$encrypt_block.=
|
|
'$'.$e.$i.' =
|
|
$sbox[ $'.$e.$i.' & 0xff] |
|
|
($sbox[($'.$e.$i.' >> 8) & 0xff] << 8) |
|
|
($sbox[($'.$e.$i.' >> 16) & 0xff] << 16) |
|
|
($sbox[($'.$e.$i.' >> 24) & 0xff] << 24);'."\n";
|
|
}
|
|
$encrypt_block .= '$in = pack("N*"'."\n";
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$encrypt_block.= ',
|
|
($'.$e.$i .' & '.((int)0xFF000000).') ^
|
|
($'.$e.(($i + $c[1]) % $Nb).' & 0x00FF0000 ) ^
|
|
($'.$e.(($i + $c[2]) % $Nb).' & 0x0000FF00 ) ^
|
|
($'.$e.(($i + $c[3]) % $Nb).' & 0x000000FF ) ^
|
|
'.$w[$i]."\n";
|
|
}
|
|
$encrypt_block .= ');';
|
|
|
|
// Generating decrypt code:
|
|
$init_decrypt.= '
|
|
static $invtables;
|
|
if (empty($invtables)) {
|
|
$invtables = &$self->_getInvTables();
|
|
}
|
|
$dt0 = $invtables[0];
|
|
$dt1 = $invtables[1];
|
|
$dt2 = $invtables[2];
|
|
$dt3 = $invtables[3];
|
|
$isbox = $invtables[4];
|
|
';
|
|
|
|
$s = 'e';
|
|
$e = 's';
|
|
$wc = $Nb - 1;
|
|
|
|
// Preround: addRoundKey
|
|
$decrypt_block = '$in = unpack("N*", $in);'."\n";
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$decrypt_block .= '$s'.$i.' = $in['.($i + 1).'] ^ '.$dw[++$wc].';'."\n";
|
|
}
|
|
|
|
// Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
|
|
for ($round = 1; $round < $Nr; ++$round) {
|
|
list($s, $e) = array($e, $s);
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$decrypt_block.=
|
|
'$'.$e.$i.' =
|
|
$dt0[($'.$s.$i .' >> 24) & 0xff] ^
|
|
$dt1[($'.$s.(($Nb + $i - $c[1]) % $Nb).' >> 16) & 0xff] ^
|
|
$dt2[($'.$s.(($Nb + $i - $c[2]) % $Nb).' >> 8) & 0xff] ^
|
|
$dt3[ $'.$s.(($Nb + $i - $c[3]) % $Nb).' & 0xff] ^
|
|
'.$dw[++$wc].";\n";
|
|
}
|
|
}
|
|
|
|
// Finalround: subWord + shiftRows + addRoundKey
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$decrypt_block.=
|
|
'$'.$e.$i.' =
|
|
$isbox[ $'.$e.$i.' & 0xff] |
|
|
($isbox[($'.$e.$i.' >> 8) & 0xff] << 8) |
|
|
($isbox[($'.$e.$i.' >> 16) & 0xff] << 16) |
|
|
($isbox[($'.$e.$i.' >> 24) & 0xff] << 24);'."\n";
|
|
}
|
|
$decrypt_block .= '$in = pack("N*"'."\n";
|
|
for ($i = 0; $i < $Nb; ++$i) {
|
|
$decrypt_block.= ',
|
|
($'.$e.$i. ' & '.((int)0xFF000000).') ^
|
|
($'.$e.(($Nb + $i - $c[1]) % $Nb).' & 0x00FF0000 ) ^
|
|
($'.$e.(($Nb + $i - $c[2]) % $Nb).' & 0x0000FF00 ) ^
|
|
($'.$e.(($Nb + $i - $c[3]) % $Nb).' & 0x000000FF ) ^
|
|
'.$dw[$i]."\n";
|
|
}
|
|
$decrypt_block .= ');';
|
|
|
|
$lambda_functions[$code_hash] = $this->_createInlineCryptFunction(
|
|
array(
|
|
'init_crypt' => '',
|
|
'init_encrypt' => $init_encrypt,
|
|
'init_decrypt' => $init_decrypt,
|
|
'encrypt_block' => $encrypt_block,
|
|
'decrypt_block' => $decrypt_block
|
|
)
|
|
);
|
|
}
|
|
$this->inline_crypt = $lambda_functions[$code_hash];
|
|
}
|
|
}
|