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< ? php
/**
* Pure - PHP implementation of Rijndael .
*
* Uses mcrypt , if available / possible , and an internal implementation , otherwise .
*
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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
* { @ 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
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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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*
* 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
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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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*
* $rijndael -> setKey ( 'abcdefghijklmnop' );
*
* $size = 10 * 1024 ;
* $plaintext = '' ;
* for ( $i = 0 ; $i < $size ; $i ++ ) {
* $plaintext .= 'a' ;
* }
*
* echo $rijndael -> decrypt ( $rijndael -> encrypt ( $plaintext ));
* ?>
* </ code >
*
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* @ category Crypt
* @ package 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
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*/
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namespace phpseclib\Crypt ;
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/**
* Pure - PHP implementation of Rijndael .
*
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* @ package Rijndael
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* @ author Jim Wigginton < terrafrost @ php . net >
* @ access public
*/
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class Rijndael extends Base
{
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/**
* The mcrypt specific name of the cipher
*
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* Mcrypt is useable for 128 / 192 / 256 - bit $block_size / $key_length . For 160 / 224 not .
* \phpseclib\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 .
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*
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* @ see \phpseclib\Crypt\Base :: cipher_name_mcrypt
* @ see \phpseclib\Crypt\Base :: engine
* @ see self :: isValidEngine ()
* @ var string
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* @ access private
*/
var $cipher_name_mcrypt = 'rijndael-128' ;
/**
* The default salt used by setPassword ()
*
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* @ see \phpseclib\Crypt\Base :: password_default_salt
* @ see \phpseclib\Crypt\Base :: setPassword ()
* @ var string
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* @ access private
*/
var $password_default_salt = 'phpseclib' ;
/**
* The Key Schedule
*
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* @ see self :: _setup ()
* @ var array
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* @ access private
*/
var $w ;
/**
* The Inverse Key Schedule
*
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* @ see self :: _setup ()
* @ var array
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* @ access private
*/
var $dw ;
/**
* The Block Length divided by 32
*
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* @ see self :: setBlockLength ()
* @ var int
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* @ 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 ;
/**
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* The Key Length ( in bytes )
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*
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* @ see self :: setKeyLength ()
* @ var int
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* @ access private
* @ 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
* 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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var $key_length = 16 ;
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/**
* The Key Length divided by 32
*
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* @ see self :: setKeyLength ()
* @ var int
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* @ access private
* @ internal The max value is 256 / 32 = 8 , the min value is 128 / 32 = 4
*/
var $Nk = 4 ;
/**
* The Number of Rounds
*
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* @ var int
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* @ access private
* @ internal The max value is 14 , the min value is 10.
*/
var $Nr ;
/**
* Shift offsets
*
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* @ var array
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* @ access private
*/
var $c ;
/**
* Holds the last used key - and block_size information
*
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* @ var array
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* @ access private
*/
var $kl ;
/**
* Default Constructor .
*
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* @ param int $mode
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* @ access public
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* @ throws \InvalidArgumentException if an invalid / unsupported mode is provided
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*/
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function __construct ( $mode )
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{
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if ( $mode == self :: MODE_STREAM ) {
throw new \InvalidArgumentException ( 'Block ciphers cannot be ran in stream mode' );
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}
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parent :: __construct ( $mode );
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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.
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*
* 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
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* the mcrypt php extension , even if available .
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* This results then in slower encryption .
*
* @ access public
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* @ throws \LengthException if the key length is invalid
* @ param int $length
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*/
function setKeyLength ( $length )
{
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switch ( $length ) {
case 128 :
case 160 :
case 192 :
case 224 :
case 256 :
$this -> key_length = $length >> 3 ;
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break ;
default :
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throw new \LengthException ( 'Key size of ' . $length . ' bits is not supported by this algorithm. Only keys of sizes 128, 160, 192, 224 or 256 bits are supported' );
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}
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parent :: setKeyLength ( $length );
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}
/**
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* Sets the key .
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*
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* Rijndael supports five different key lengths
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*
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* @ see setKeyLength ()
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* @ access public
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* @ param string $key
* @ throws \LengthException if the key length isn ' t supported
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*/
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function setKey ( $key )
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{
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switch ( strlen ( $key )) {
case 16 :
case 20 :
case 24 :
case 28 :
case 32 :
break ;
default :
throw new \LengthException ( 'Key of size ' . strlen ( $key ) . ' not supported by this algorithm. Only keys of sizes 16, 20, 24, 28 or 32 are supported' );
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}
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parent :: setKey ( $key );
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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.
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*
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* @ access public
* @ param int $length
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*/
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function setBlockLength ( $length )
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{
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switch ( $length ) {
case 128 :
case 160 :
case 192 :
case 224 :
case 256 :
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break ;
default :
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throw new \LengthException ( 'Key size of ' . $length . ' bits is not supported by this algorithm. Only keys of sizes 128, 160, 192, 224 or 256 bits are supported' );
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}
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$this -> Nb = $length >> 5 ;
$this -> block_size = $length >> 3 ;
$this -> changed = true ;
$this -> _setEngine ();
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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 ()
*
* @ see \phpseclib\Crypt\Base :: __construct ()
* @ param int $engine
* @ access public
* @ return bool
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*/
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function isValidEngine ( $engine )
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{
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switch ( $engine ) {
case self :: 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 self :: 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 );
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}
/**
* Encrypts a block
*
* @ access private
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* @ param string $in
* @ return string
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*/
function _encryptBlock ( $in )
{
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static $tables ;
if ( empty ( $tables )) {
$tables = & $this -> _getTables ();
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}
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$t0 = $tables [ 0 ];
$t1 = $tables [ 1 ];
$t2 = $tables [ 2 ];
$t3 = $tables [ 3 ];
$sbox = $tables [ 4 ];
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$state = array ();
$words = unpack ( 'N*' , $in );
$c = $this -> c ;
$w = $this -> w ;
$Nb = $this -> Nb ;
$Nr = $this -> Nr ;
// addRoundKey
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$wc = $Nb - 1 ;
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foreach ( $words as $word ) {
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$state [] = $word ^ $w [ ++ $wc ];
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}
// 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 [ $l ] & 0x000000FF ] ^
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$w [ ++ $wc ];
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++ $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 [ $l ] & 0x000000FF ) ^
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$w [ $i ];
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++ $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
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* @ param string $in
* @ return string
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*/
function _decryptBlock ( $in )
{
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static $invtables ;
if ( empty ( $invtables )) {
$invtables = & $this -> _getInvTables ();
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}
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$dt0 = $invtables [ 0 ];
$dt1 = $invtables [ 1 ];
$dt2 = $invtables [ 2 ];
$dt3 = $invtables [ 3 ];
$isbox = $invtables [ 4 ];
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$state = array ();
$words = unpack ( 'N*' , $in );
$c = $this -> c ;
$dw = $this -> dw ;
$Nb = $this -> Nb ;
$Nr = $this -> Nr ;
// addRoundKey
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$wc = $Nb - 1 ;
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foreach ( $words as $word ) {
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$state [] = $word ^ $dw [ ++ $wc ];
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}
$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 [ $l ] & 0x000000FF ] ^
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$dw [ ++ $wc ];
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++ $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 [ $l ] & 0x000000FF );
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$temp [ $i ] = $dw [ $i ] ^ ( $isbox [ $word & 0x000000FF ] |
( $isbox [ $word >> 8 & 0x000000FF ] << 8 ) |
( $isbox [ $word >> 16 & 0x000000FF ] << 16 ) |
( $isbox [ $word >> 24 & 0x000000FF ] << 24 ));
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++ $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 )
*
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* @ see \phpseclib\Crypt\Base :: _setupKey ()
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* @ 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
);
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if ( isset ( $this -> kl [ 'key' ]) && $this -> key === $this -> kl [ 'key' ] && $this -> key_length === $this -> kl [ 'key_length' ] && $this -> block_size === $this -> kl [ 'block_size' ]) {
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// already expanded
return ;
}
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$this -> kl = array ( 'key' => $this -> key , 'key_length' => $this -> key_length , 'block_size' => $this -> block_size );
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$this -> Nk = $this -> key_length >> 2 ;
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// 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 ];
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} elseif ( $this -> Nk > 6 && $i % $this -> Nk == 4 ) {
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$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"
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list ( $dt0 , $dt1 , $dt2 , $dt3 ) = $this -> _getInvTables ();
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$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 ][ $j ]);
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$temp [ $j ] = $dt0 [ $dw >> 24 & 0x000000FF ] ^
$dt1 [ $dw >> 16 & 0x000000FF ] ^
$dt2 [ $dw >> 8 & 0x000000FF ] ^
$dt3 [ $dw & 0x000000FF ];
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$j ++ ;
}
$this -> dw [ $row ] = $temp ;
}
$col = 0 ;
$row ++ ;
}
$this -> w [ $row ][ $col ] = $w [ $i ];
}
$this -> dw [ $row ] = $this -> w [ $row ];
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// 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 ][ $c ];
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}
}
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$this -> w = $w ;
$this -> dw = $dw ;
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}
/**
* Performs S - Box substitutions
*
* @ access private
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* @ param int $word
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*/
function _subWord ( $word )
{
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static $sbox ;
if ( empty ( $sbox )) {
list (, , , , $sbox ) = $this -> _getTables ();
}
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return $sbox [ $word & 0x000000FF ] |
( $sbox [ $word >> 8 & 0x000000FF ] << 8 ) |
( $sbox [ $word >> 16 & 0x000000FF ] << 16 ) |
( $sbox [ $word >> 24 & 0x000000FF ] << 24 );
}
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/**
* Provides the mixColumns and sboxes tables
*
* @ see self :: _encryptBlock ()
* @ see self :: _setupInlineCrypt ()
* @ see self :: _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 self :: _decryptBlock ()
* @ see self :: _setupInlineCrypt ()
* @ see self :: _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 ;
}
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/**
* Setup the performance - optimized function for de / encrypt ()
*
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* @ see \phpseclib\Crypt\Base :: _setupInlineCrypt ()
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* @ 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 $this->inline_crypt, must work as fast as even possible.
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$lambda_functions =& self :: _getLambdaFunctions ();
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// 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 );
}
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if ( ! isset ( $lambda_functions [ $code_hash ])) {
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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 = $self->dw;' ;
}
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$Nr = $this -> Nr ;
$Nb = $this -> Nb ;
$c = $this -> c ;
// Generating encrypt code:
$init_encrypt .= '
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static $tables ;
if ( empty ( $tables )) {
$tables = & $self -> _getTables ();
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}
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$t0 = $tables [ 0 ];
$t1 = $tables [ 1 ];
$t2 = $tables [ 2 ];
$t3 = $tables [ 3 ];
$sbox = $tables [ 4 ];
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' ;
$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 .= ' ,
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( $ '.$e.$i .' & '.((int)0xFF000000).' ) ^
( $ '.$e.(($i + $c[1]) % $Nb).' & 0x00FF0000 ) ^
( $ '.$e.(($i + $c[2]) % $Nb).' & 0x0000FF00 ) ^
( $ '.$e.(($i + $c[3]) % $Nb).' & 0x000000FF ) ^
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' . $w [ $i ] . " \n " ;
}
$encrypt_block .= ');' ;
// Generating decrypt code:
$init_decrypt .= '
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static $invtables ;
if ( empty ( $invtables )) {
$invtables = & $self -> _getInvTables ();
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}
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$dt0 = $invtables [ 0 ];
$dt1 = $invtables [ 1 ];
$dt2 = $invtables [ 2 ];
$dt3 = $invtables [ 3 ];
$isbox = $invtables [ 4 ];
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' ;
$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 .= ' ,
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( $ '.$e.$i. ' & '.((int)0xFF000000).' ) ^
( $ '.$e.(($Nb + $i - $c[1]) % $Nb).' & 0x00FF0000 ) ^
( $ '.$e.(($Nb + $i - $c[2]) % $Nb).' & 0x0000FF00 ) ^
( $ '.$e.(($Nb + $i - $c[3]) % $Nb).' & 0x000000FF ) ^
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' . $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 ];
}
}