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- added SSH2.php and HMAC.php

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- fixed issue with the IV's in TripleDES.php and DES.php
- fixed decryption in TripleDES.php using CRYPT_DES_MODE_INTERNAL
- renamed CRYPT_DES_MODE_SSH to CRYPT_DES_MODE_3CBC
- added CRYPT_DES_MODE_CBC3 as an alias for CRYPT_DES_MODE_CBC
- fixed issue with RC4.php using CRYPT_RC4_MODE_MCRYPT


git-svn-id: http://phpseclib.svn.sourceforge.net/svnroot/phpseclib/trunk@4 21d32557-59b3-4da0-833f-c5933fad653e
This commit is contained in:
Jim Wigginton 2007-07-23 05:21:39 +00:00
parent 367ddebf80
commit df0fe2386a
7 changed files with 1712 additions and 103 deletions
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6
phpseclib/Crypt/DES.php
View File

@ -53,7 +53,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: DES.php,v 1.1 2007-07-02 04:19:47 terrafrost Exp $
* @version $Id: DES.php,v 1.2 2007-07-23 05:21:39 terrafrost Exp $
* @link http://pear.php.net/package/Crypt_DES
*/
@ -264,7 +264,7 @@ class Crypt_DES {
*/
function setIV($iv)
{
$this->iv = str_pad(substr($iv, 0, 8), 8, chr(0));;
$this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($iv, 0, 8), 8, chr(0));;
}
/**
@ -521,7 +521,7 @@ class Crypt_DES {
return $text;
}
$length = ord($text{strlen($text) - 1});
$length = ord($text[strlen($text) - 1]);
return substr($text, 0, -$length);
}

200
phpseclib/Crypt/HMAC.php Normal file
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@ -0,0 +1,200 @@
<?php
/**#@+
* @access private
* @see Crypt_HMAC::Crypt_HMAC()
*/
/**
* Toggles the internal implementation
*/
define('CRYPT_HMAC_MODE_INTERNAL', 1);
/**
* Toggles the mhash() implementation, which has been deprecated on PHP 5.3.0+.
*/
define('CRYPT_HMAC_MODE_MHASH', 2);
/**
* Toggles the hash() implementation, which works on PHP 5.1.2+.
*/
define('CRYPT_HMAC_MODE_HASH', 3);
/**#@-*/
/**
* Pure-PHP implementation of keyed-hash message authentication codes (HMACs).
*
* @author Jim Wigginton <terrafrost@php.net>
* @version 0.1.0
* @access public
* @package Crypt_HMAC
*/
class Crypt_HMAC {
/**
* Byte-length of compression blocks
*
* The following URL provides more information:
*
* {@link http://tools.ietf.org/html/rfc2104#section-2 http://tools.ietf.org/html/rfc2104#section-2}
*
* @see Crypt_HMAC::setHash()
* @var Integer
* @access private
*/
var $b;
/**
* Byte-length of hash outputs
*
* @see Crypt_HMAC::setHash()
* @var Integer
* @access private
*/
var $l;
/**
* Hash Algorithm
*
* @see Crypt_HMAC::setHash()
* @var String
* @access private
*/
var $hash;
/**
* Key
*
* @see Crypt_HMAC::setKey()
* @var String
* @access private
*/
var $key = '';
/**
* Outer XOR
*
* @see Crypt_HMAC::setKey()
* @var String
* @access private
*/
var $opad;
/**
* Inner XOR
*
* @see Crypt_HMAC::setKey()
* @var String
* @access private
*/
var $ipad;
/**
* Default Constructor.
*
* @return Crypt_HMAC
* @access public
*/
function Crypt_HMAC()
{
if ( !defined('CRYPT_HMAC_MODE') ) {
switch (true) {
case extension_loaded('hash'):
define('CRYPT_HMAC_MODE', CRYPT_HMAC_MODE_HASH);
break;
case extension_loaded('mhash'):
define('CRYPT_HMAC_MODE', CRYPT_HMAC_MODE_MHASH);
break;
default:
define('CRYPT_HMAC_MODE', CRYPT_HMAC_MODE_INTERNAL);
}
}
$this->setHash('sha1');
}
/**
* Sets the key.
*
* @access public
* @param String $key
*/
function setKey($key)
{
$this->key = $key;
}
/**
* Sets the hash function.
*
* Currently, only 'sha1' and 'md5' are supported. If you do not supply a valid $hash, 'sha1' will be used.
*
* @access public
* @param String $hash
*/
function setHash($hash)
{
switch (CRYPT_HMAC_MODE) {
case CRYPT_HMAC_MODE_MHASH:
switch ($hash) {
case 'md5':
$this->hash = MHASH_MD5;
break;
case 'sha1':
default:
$this->hash = MHASH_SHA1;
}
return;
case CRYPT_HMAC_MODE_HASH:
switch ($hash) {
case 'md5':
case 'sha1':
$this->hash = $hash;
return;
default:
$this->hash = 'sha1';
}
}
switch ($hash) {
case 'md5':
$this->b = 64;
$this->l = 16;
$this->hash = 'md5';
break;
case 'sha1':
default:
$this->b = 64;
$this->l = 20;
$this->hash = 'sha1';
}
$this->ipad = str_repeat(chr(0x36), $this->b);
$this->opad = str_repeat(chr(0x5C), $this->b);
}
/**
* Compute the HMAC.
*
* @access public
* @param String $text
*/
function hmac($text)
{
switch (CRYPT_HMAC_MODE) {
case CRYPT_HMAC_MODE_MHASH:
return mhash($this->hash, $text, $this->key);
case CRYPT_HMAC_MODE_HASH:
return hash_hmac($this->hash, $text, $this->key, true);
}
$hash = $this->hash;
$key = strlen($this->key) > $this->b ? $this->hash($this->key) : $this->key;
$key = str_pad($key, $this->b, chr(0)); // step 1
$temp = $this->ipad ^ $key; // step 2
$temp.= $text; // step 3
$temp = pack('H*', $hash($temp)); // step 4
$hmac = $this->opad ^ $key; // step 5
$hmac.= $temp; // step 6
$hmac = pack('H*', $hash($hmac)); // step 7
return $hmac;
}
}

163
phpseclib/Crypt/RC4.php
View File

@ -55,7 +55,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: RC4.php,v 1.1 2007-07-02 04:19:47 terrafrost Exp $
* @version $Id: RC4.php,v 1.2 2007-07-23 05:21:39 terrafrost Exp $
* @link http://pear.php.net/package/Crypt_RC4
*/
@ -139,6 +139,15 @@ class Crypt_RC4 {
*/
var $decryptIndex = 0;
/**
* MCrypt parameters
*
* @see Crypt_RC4::setMCrypt()
* @var Array
* @access private
*/
var $mcrypt = array('', '');
/**
* The Encryption Algorithm
*
@ -168,38 +177,29 @@ class Crypt_RC4 {
// but since that can be changed after the object has been created, there doesn't seem to be
// a lot of point...
define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_MCRYPT);
switch (true) {
case defined('MCRYPT_ARCFOUR'):
$this->mode = MCRYPT_ARCFOUR;
break;
case defined('MCRYPT_RC4');
$this->mode = MCRYPT_RC4;
}
$this->encryptStream = @mcrypt_module_open($this->mode, '', MCRYPT_MODE_STREAM, '');
$this->decryptStream = @mcrypt_module_open($this->mode, '', MCRYPT_MODE_STREAM, '');
break;
default:
define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_INTERNAL);
}
}
switch ( CRYPT_RC4_MODE ) {
case CRYPT_RC4_MODE_MCRYPT:
switch (true) {
case defined('MCRYPT_ARCFOUR'):
$this->mode = MCRYPT_ARCFOUR;
break;
case defined('MCRYPT_RC4');
$this->mode = MCRYPT_RC4;
}
}
}
/**
* Sets the key.
*
* Keys can be between 1 and 256 bytes long. If they are longer then 256 bytes, the first 256 bytes will
* be used. If no key is explicitly set, it'll be assumed to be a single null byte. Some protocols, such
* as WEP, prepend an "initialization vector" to the key, effectively creating a new key [1]. If you need
* to use an initialization vector in this manner, feel free to preend it to the key, yourself, before
* calling this function.
*
* [1] WEP's initialization vectors (IV's) are used in a somewhat insecure way. Since, in that protocol,
* the IV's are relatively easy to predict, an attack described by
* {@link http://www.drizzle.com/~aboba/IEEE/rc4_ksaproc.pdf Scott Fluhrer, Itsik Mantin, and Adi Shamir}
* can be used to quickly guess at the rest of the key. The following links elaborate:
*
* {@link http://www.rsa.com/rsalabs/node.asp?id=2009 http://www.rsa.com/rsalabs/node.asp?id=2009}
* {@link http://en.wikipedia.org/wiki/Related_key_attack http://en.wikipedia.org/wiki/Related_key_attack}
* be used. If no key is explicitly set, it'll be assumed to be a single null byte.
*
* @access public
* @param String $key
@ -229,6 +229,29 @@ class Crypt_RC4 {
$this->encryptStream = $this->decryptStream = $keyStream;
}
/**
* Dummy function.
*
* Some protocols, such as WEP, prepend an "initialization vector" to the key, effectively creating a new key [1].
* If you need to use an initialization vector in this manner, feel free to prepend it to the key, yourself, before
* calling setKey().
*
* [1] WEP's initialization vectors (IV's) are used in a somewhat insecure way. Since, in that protocol,
* the IV's are relatively easy to predict, an attack described by
* {@link http://www.drizzle.com/~aboba/IEEE/rc4_ksaproc.pdf Scott Fluhrer, Itsik Mantin, and Adi Shamir}
* can be used to quickly guess at the rest of the key. The following links elaborate:
*
* {@link http://www.rsa.com/rsalabs/node.asp?id=2009 http://www.rsa.com/rsalabs/node.asp?id=2009}
* {@link http://en.wikipedia.org/wiki/Related_key_attack http://en.wikipedia.org/wiki/Related_key_attack}
*
* @param String $iv
* @see Crypt_RC4::setKey()
* @access public
*/
function setIV($iv)
{
}
/**
* Sets MCrypt parameters. (optional)
*
@ -241,8 +264,10 @@ class Crypt_RC4 {
*/
function setMCrypt($algorithm_directory, $mode_directory)
{
$this->encryptStream = @mcrypt_module_open($this->mode, $algorithm_directory, MCRYPT_MODE_STREAM, $mode_directory);
$this->decryptStream = @mcrypt_module_open($this->mode, $algorithm_directory, MCRYPT_MODE_STREAM, $mode_directory);
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
$this->mcrypt = array($algorithm_directory, $mode_directory);
$this->_closeMCrypt();
}
}
/**
@ -280,6 +305,23 @@ class Crypt_RC4 {
* @param Integer $mode
*/
function _crypt($text, $mode) {
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
$keyStream = $mode == CRYPT_RC4_ENCRYPT ? 'encryptStream' : 'decryptStream';
if ($this->$keyStream === false) {echo "crypt-toe'ing $keyStream";
$this->$keyStream = mcrypt_module_open($this->mode, $this->mcrypt[0], MCRYPT_MODE_STREAM, $this->mcrypt[1]);
mcrypt_generic_init($this->$keyStream, $this->key, '');
} else if (!$this->continuousBuffer) {
mcrypt_generic_init($this->$keyStream, $this->key, '');
}
$newText = mcrypt_generic($this->$keyStream, $text);
if (!$this->continuousBuffer) {
mcrypt_generic_deinit($this->$keyStream);
}
return $newText;
}
switch ($mode) {
case CRYPT_RC4_ENCRYPT:
$keyStream = $this->encryptStream;
@ -290,18 +332,6 @@ class Crypt_RC4 {
list($i, $j) = $this->decryptIndex;
}
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
if (!$this->continuousBuffer) {
mcrypt_generic_init($keyStream, $this->key, '');
}
$newText = mcrypt_generic($keyStream, $text);
if (!$this->continuousBuffer) {
mcrypt_generic_deinit($keyStream);
}
return $newText;
}
$newText = '';
for ($k = 0; $k < strlen($text); $k++) {
$i = ($i + 1) & 255;
@ -367,14 +397,6 @@ class Crypt_RC4 {
*/
function enableContinuousBuffer()
{
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
$this->encryptStream = mcrypt_module_open($this->mode, $this->mcrypt[0], MCRYPT_MODE_STREAM, $this->mcrypt[1]);
$this->decryptStream = mcrypt_module_open($this->mode, $this->mcrypt[0], MCRYPT_MODE_STREAM, $this->mcrypt[1]);
mcrypt_generic_init($this->encryptStream, $this->key, '');
mcrypt_generic_init($this->decryptStream, $this->key, '');
}
$this->continuousBuffer = true;
}
@ -396,6 +418,29 @@ class Crypt_RC4 {
$this->continuousBuffer = false;
}
/**
* Dummy function.
*
* Since RC4 is a stream cipher and not a block cipher, no padding is necessary. The only reason this function is
* included is so that you can switch between a block cipher and a stream cipher transparently.
*
* @see Crypt_RC4::disablePadding()
* @access public
*/
function enablePadding()
{
}
/**
* Dummy function.
*
* @see Crypt_RC4::enablePadding()
* @access public
*/
function disablePadding()
{
}
/**
* Class destructor.
*
@ -404,18 +449,38 @@ class Crypt_RC4 {
*
* @access public
*/
function __destruct() {
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT && isset($this->encryptStream) ) {
function __destruct()
{
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
$this->_closeMCrypt();
}
}
/**
* Properly close the MCrypt objects.
*
* @access prviate
*/
function _closeMCrypt()
{
if ( $this->encryptStream !== false ) {
if ( $this->continuousBuffer ) {
mcrypt_generic_deinit($this->encryptStream);
mcrypt_generic_deinit($this->decryptStream);
}
mcrypt_module_close($this->encryptStream);
$this->encryptStream = false;
}
if ( $this->decryptStream !== false ) {
if ( $this->continuousBuffer ) {
mcrypt_generic_deinit($this->decryptStream);
}
mcrypt_module_close($this->decryptStream);
unset($this->encryptStream);
unset($this->decryptStream);
$this->decryptStream = false;
}
}
}

2
phpseclib/Crypt/Random.php
View File

@ -35,7 +35,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: Random.php,v 1.1 2007-07-02 04:19:47 terrafrost Exp $
* @version $Id: Random.php,v 1.2 2007-07-23 05:21:39 terrafrost Exp $
* @link http://pear.php.net/package/Crypt_Random
*/

95
phpseclib/Crypt/TripleDES.php
View File

@ -4,7 +4,7 @@
/**
* Pure-PHP implementations of Triple DES.
*
* Uses mcrypt, if available, and an internal implementation, otherwise.
* Uses mcrypt, if available, and an internal implementation, otherwise. Operates in the EDE3 mode (encrypt-decrypt-encrypt).
*
* PHP versions 4 and 5
*
@ -47,7 +47,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVII Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: TripleDES.php,v 1.1 2007-07-02 04:19:47 terrafrost Exp $
* @version $Id: TripleDES.php,v 1.2 2007-07-23 05:21:39 terrafrost Exp $
* @link http://pear.php.net/package/Crypt_TripleDES
*/
@ -57,11 +57,18 @@
require_once 'DES.php';
/**
* Encrypt / decrypt using a method required by SSHv1
* Encrypt / decrypt using inner chaining
*
* mcrypt does a single XOR operation for each block in CBC mode. SSHv1 requires three XOR operations.
* Inner chaining is used by SSH-1 and is generally considered to be less secure then outer chaining (CRYPT_DES_MODE_CBC3).
*/
define('CRYPT_DES_MODE_SSH', 3);
define('CRYPT_DES_MODE_3CBC', 3);
/**
* Encrypt / decrypt using outer chaining
*
* Outer chaining is used by SSH-2 and when the mode is set to CRYPT_DES_MODE_CBC.
*/
define('CRYPT_DES_MODE_CBC3', CRYPT_DES_MODE_CBC);
/**
* Pure-PHP implementation of Triple DES.
@ -69,7 +76,7 @@ define('CRYPT_DES_MODE_SSH', 3);
* @author Jim Wigginton <terrafrost@php.net>
* @version 0.1.0
* @access public
* @package Crypt_DES
* @package Crypt_TerraDES
*/
class Crypt_TripleDES {
/**
@ -177,13 +184,19 @@ class Crypt_TripleDES {
}
}
if ( $mode == CRYPT_DES_MODE_SSH ) {
$this->mode = CRYPT_DES_MODE_SSH;
if ( $mode == CRYPT_DES_MODE_3CBC ) {
$this->mode = CRYPT_DES_MODE_3CBC;
$this->des = array(
new Crypt_DES(CRYPT_DES_MODE_CBC),
new Crypt_DES(CRYPT_DES_MODE_CBC),
new Crypt_DES(CRYPT_DES_MODE_CBC)
);
// we're going to be doing the padding, ourselves, so disable it in the Crypt_DES objects
$this->des[0]->disablePadding();
$this->des[1]->disablePadding();
$this->des[2]->disablePadding();
return;
}
@ -204,6 +217,11 @@ class Crypt_TripleDES {
new Crypt_DES(CRYPT_DES_MODE_ECB),
new Crypt_DES(CRYPT_DES_MODE_ECB)
);
// we're going to be doing the padding, ourselves, so disable it in the Crypt_DES objects
$this->des[0]->disablePadding();
$this->des[1]->disablePadding();
$this->des[2]->disablePadding();
switch ($mode) {
case CRYPT_DES_MODE_ECB:
@ -236,26 +254,15 @@ class Crypt_TripleDES {
$key = str_pad($key, 24, chr(0));
// if $key is between 64 and 128-bits, use the first 64-bits as the last, per this:
// http://php.net/function.mcrypt-encrypt#47973
$key = $length <= 16 ? substr_replace($key, substr($key, 0, 8), 16) : $key;
$key = $length <= 16 ? substr_replace($key, substr($key, 0, 8), 16) : substr($key, 0, 24);
}
$this->key = $key;
switch (true) {
case CRYPT_DES_MODE == CRYPT_DES_MODE_INTERNAL:
case $this->mode == CRYPT_DES_MODE_SSH:
case $this->mode == CRYPT_DES_MODE_3CBC:
$this->des[0]->setKey(substr($key, 0, 8));
$this->des[1]->setKey(substr($key, 8, 8));
$this->des[2]->setKey(substr($key, 16, 8));
// we're going to be doing the padding, ourselves, so disable it in the Crypt_DES objects
$this->des[0]->disablePadding();
$this->des[1]->disablePadding();
$this->des[2]->disablePadding();
}
if ($this->mode == CRYPT_DES_MODE_SSH) {
$this->des[0]->enableContinuousBuffer();
$this->des[1]->enableContinuousBuffer();
$this->des[2]->enableContinuousBuffer();
}
}
@ -270,7 +277,12 @@ class Crypt_TripleDES {
*/
function setIV($iv)
{
$this->iv = str_pad(substr($key, 0, 8), 8, chr(0));;
$this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($iv, 0, 8), 8, chr(0));
if ($this->mode == CRYPT_DES_MODE_3CBC) {
$this->des[0]->setIV($iv);
$this->des[1]->setIV($iv);
$this->des[2]->setIV($iv);
}
}
/**
@ -286,7 +298,7 @@ class Crypt_TripleDES {
function setMCrypt($algorithm_directory, $mode_directory)
{
$this->mcrypt = array($algorithm_directory, $mode_directory);
if ( $this->mode == CRYPT_DES_MODE_SSH ) {
if ( $this->mode == CRYPT_DES_MODE_3CBC ) {
$this->des[0]->setMCrypt($algorithm_directory, $mode_directory);
$this->des[1]->setMCrypt($algorithm_directory, $mode_directory);
$this->des[2]->setMCrypt($algorithm_directory, $mode_directory);
@ -301,17 +313,17 @@ class Crypt_TripleDES {
*/
function encrypt($plaintext)
{
if ($this->padding) {
$plaintext = $this->_pad($plaintext);
}
// if the key is smaller then 8, do what we'd normally do
if ($this->mode == CRYPT_DES_MODE_SSH && strlen($this->key) > 8) {
if ($this->mode == CRYPT_DES_MODE_3CBC && strlen($this->key) > 8) {
$ciphertext = $this->des[2]->encrypt($this->des[1]->decrypt($this->des[0]->encrypt($plaintext)));
return $ciphertext;
}
if ($this->padding) {
$plaintext = $this->_pad($plaintext);
}
if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {
$td = mcrypt_module_open(MCRYPT_3DES, $this->mcrypt[0], $this->mode, $this->mcrypt[1]);
mcrypt_generic_init($td, $this->key, $this->encryptIV);
@ -375,10 +387,10 @@ class Crypt_TripleDES {
*/
function decrypt($ciphertext)
{
if ($this->mode == CRYPT_DES_MODE_SSH && strlen($this->key) > 8) {
if ($this->mode == CRYPT_DES_MODE_3CBC && strlen($this->key) > 8) {
$plaintext = $this->des[0]->decrypt($this->des[1]->encrypt($this->des[2]->decrypt($ciphertext)));
return $plaintext;
return $this->_unpad($plaintext);
}
// we pad with chr(0) since that's what mcrypt_generic does. to quote from http://php.net/function.mcrypt-generic :
@ -404,7 +416,7 @@ class Crypt_TripleDES {
if (strlen($this->key) <= 8) {
$this->des[0]->mode = $this->mode;
return $this->des[0]->decrypt($plaintext);
return $this->_unpad($this->des[0]->decrypt($plaintext));
}
$plaintext = '';
@ -412,9 +424,9 @@ class Crypt_TripleDES {
case CRYPT_DES_MODE_ECB:
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$block = substr($ciphertext, $i, 8);
$block = $this->des[0]->_processBlock($block, CRYPT_DES_DECRYPT);
$block = $this->des[1]->_processBlock($block, CRYPT_DES_ENCRYPT);
$block = $this->des[2]->_processBlock($block, CRYPT_DES_DECRYPT);
$block = $this->des[1]->_processBlock($block, CRYPT_DES_ENCRYPT);
$block = $this->des[0]->_processBlock($block, CRYPT_DES_DECRYPT);
$plaintext.= $block;
}
break;
@ -422,9 +434,9 @@ class Crypt_TripleDES {
$xor = $this->decryptIV;
for ($i = 0; $i < strlen($ciphertext); $i+=8) {
$orig = $block = substr($ciphertext, $i, 8);
$block = $this->des[0]->_processBlock($block, CRYPT_DES_DECRYPT);
$block = $this->des[1]->_processBlock($block, CRYPT_DES_ENCRYPT);
$block = $this->des[2]->_processBlock($block, CRYPT_DES_DECRYPT);
$block = $this->des[1]->_processBlock($block, CRYPT_DES_ENCRYPT);
$block = $this->des[0]->_processBlock($block, CRYPT_DES_DECRYPT);
$plaintext.= $block ^ $xor;
$xor = $orig;
}
@ -476,6 +488,11 @@ class Crypt_TripleDES {
function enableContinuousBuffer()
{
$this->continuousBuffer = true;
if ($this->mode == CRYPT_DES_MODE_3CBC) {
$this->des[0]->enableContinuousBuffer();
$this->des[1]->enableContinuousBuffer();
$this->des[2]->enableContinuousBuffer();
}
}
/**
@ -491,6 +508,12 @@ class Crypt_TripleDES {
$this->continuousBuffer = false;
$this->encryptIV = $this->iv;
$this->decryptIV = $this->iv;
if ($this->mode == CRYPT_DES_MODE_3CBC) {
$this->des[0]->disableContinuousBuffer();
$this->des[1]->disableContinuousBuffer();
$this->des[2]->disableContinuousBuffer();
}
}
/**
@ -554,7 +577,7 @@ class Crypt_TripleDES {
return $text;
}
$length = ord($text{strlen($text) - 1});
$length = ord($text[strlen($text) - 1]);
return substr($text, 0, -$length);
}
}

26
phpseclib/Math/BigInteger.php
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@ -69,7 +69,7 @@
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMVI Jim Wigginton
* @license http://www.gnu.org/licenses/lgpl.txt
* @version $Id: BigInteger.php,v 1.1 2007-07-02 04:19:47 terrafrost Exp $
* @version $Id: BigInteger.php,v 1.2 2007-07-23 05:21:39 terrafrost Exp $
* @link http://pear.php.net/package/Math_BigInteger
*/
@ -1076,7 +1076,7 @@ class Math_BigInteger {
return false;
}
return $temp->modPow($e,$n);
return $temp->modPow($e, $n);
}
switch ( MATH_BIGINTEGER_MODE ) {
@ -1158,9 +1158,6 @@ class Math_BigInteger {
* however, this function performs a modular reduction after every multiplication and squaring operation.
* As such, this function has the same preconditions that the reductions being used do.
*
* The window size is calculated in the same fashion that the window size in BigInteger.java's oddModPow
* function is.
*
* @param Math_BigInteger $e
* @param Math_BigInteger $n
* @param Integer $mode
@ -1169,7 +1166,8 @@ class Math_BigInteger {
*/
function _slidingWindow($e, $n, $mode)
{
static $window_ranges = array(7, 25, 81, 241, 673, 1793);
static $window_ranges = array(7, 25, 81, 241, 673, 1793); // from BigInteger.java's oddModPow function
//static $window_ranges = array(0, 7, 36, 140, 450, 1303, 3529); // from MPM 7.3.1
$e_length = count($e->value) - 1;
$e_bits = decbin($e->value[$e_length]);
@ -1227,13 +1225,13 @@ class Math_BigInteger {
$result = $result->$undo($n);
for ($i = 0; $i < $e_length; ) {
if ( !$e_bits{$i} ) {
if ( !$e_bits[$i] ) {
$result = $result->_square();
$result = $result->$reduce($n);
$i++;
} else {
for ($j = $window_size - 1; $j >= 0; $j--) {
if ( $e_bits{$i + $j} ) {
if ( $e_bits[$i + $j] ) {
break;
}
}
@ -2091,8 +2089,8 @@ class Math_BigInteger {
$carry = 0;
for ($i = strlen($x) - 1; $i >= 0; $i--) {
$temp = ord($x{$i}) << $shift | $carry;
$x{$i} = chr($temp);
$temp = ord($x[$i]) << $shift | $carry;
$x[$i] = chr($temp);
$carry = $temp >> 8;
}
$carry = ($carry != 0) ? chr($carry) : '';
@ -2127,11 +2125,11 @@ class Math_BigInteger {
}
$carry = 0;
$carry_shift = 8-$shift;
$carry_shift = 8 - $shift;
for ($i = 0; $i < strlen($x); $i++) {
$temp = (ord($x{$i}) >> $shift) | $carry;
$carry = (ord($x{$i}) << $carry_shift) & 0xFF;
$x{$i} = chr($temp);
$temp = (ord($x[$i]) >> $shift) | $carry;
$carry = (ord($x[$i]) << $carry_shift) & 0xFF;
$x[$i] = chr($temp);
}
$x = ltrim($x, chr(0));

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