*
* Uses mcrypt, if available, and an internal implementation, otherwise. Operates in the EDE3 mode (encrypt-decrypt-encrypt).
*
- * PHP versions 4 and 5
+ * PHP version 5
*
* Here's a short example of how to use this library:
* <code>
* <?php
- * include 'Crypt/TripleDES.php';
+ * include 'vendor/autoload.php';
*
- * $des = new Crypt_TripleDES();
+ * $des = new \phpseclib\Crypt\TripleDES();
*
* $des->setKey('abcdefghijklmnopqrstuvwx');
*
* ?>
* </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_TripleDES
+ * @package TripleDES
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2007 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
-/**
- * Include Crypt_DES
- */
-if (!class_exists('Crypt_DES')) {
- include_once 'DES.php';
-}
-
-/**
- * Encrypt / decrypt using inner chaining
- *
- * 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_3CBC', -2);
-
-/**
- * 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);
+namespace phpseclib\Crypt;
/**
* Pure-PHP implementation of Triple DES.
*
- * @package Crypt_TripleDES
+ * @package TripleDES
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
-class Crypt_TripleDES extends Crypt_DES
+class TripleDES extends DES
{
/**
- * The default password key_size used by setPassword()
+ * Encrypt / decrypt using inner chaining
*
- * @see Crypt_DES::password_key_size
- * @see Crypt_Base::password_key_size
- * @see Crypt_Base::setPassword()
- * @var Integer
- * @access private
+ * Inner chaining is used by SSH-1 and is generally considered to be less secure then outer chaining (self::MODE_CBC3).
*/
- var $password_key_size = 24;
+ const MODE_3CBC = -2;
/**
- * The default salt used by setPassword()
+ * Encrypt / decrypt using outer chaining
*
- * @see Crypt_Base::password_default_salt
- * @see Crypt_Base::setPassword()
- * @var String
+ * Outer chaining is used by SSH-2 and when the mode is set to \phpseclib\Crypt\Base::MODE_CBC.
+ */
+ const MODE_CBC3 = Base::MODE_CBC;
+
+ /**
+ * Key Length (in bytes)
+ *
+ * @see \phpseclib\Crypt\TripleDES::setKeyLength()
+ * @var int
* @access private
*/
- var $password_default_salt = 'phpseclib';
+ var $key_length = 24;
/**
- * The namespace used by the cipher for its constants.
+ * The default salt used by setPassword()
*
- * @see Crypt_DES::const_namespace
- * @see Crypt_Base::const_namespace
- * @var String
+ * @see \phpseclib\Crypt\Base::password_default_salt
+ * @see \phpseclib\Crypt\Base::setPassword()
+ * @var string
* @access private
*/
- var $const_namespace = 'DES';
+ var $password_default_salt = 'phpseclib';
/**
* The mcrypt specific name of the cipher
*
- * @see Crypt_DES::cipher_name_mcrypt
- * @see Crypt_Base::cipher_name_mcrypt
- * @var String
+ * @see \phpseclib\Crypt\DES::cipher_name_mcrypt
+ * @see \phpseclib\Crypt\Base::cipher_name_mcrypt
+ * @var string
* @access private
*/
var $cipher_name_mcrypt = 'tripledes';
/**
* Optimizing value while CFB-encrypting
*
- * @see Crypt_Base::cfb_init_len
- * @var Integer
+ * @see \phpseclib\Crypt\Base::cfb_init_len
+ * @var int
* @access private
*/
var $cfb_init_len = 750;
/**
* max possible size of $key
*
- * @see Crypt_TripleDES::setKey()
- * @see Crypt_DES::setKey()
- * @var String
+ * @see self::setKey()
+ * @see \phpseclib\Crypt\DES::setKey()
+ * @var string
* @access private
*/
- var $key_size_max = 24;
+ var $key_length_max = 24;
/**
- * Internal flag whether using CRYPT_DES_MODE_3CBC or not
+ * Internal flag whether using self::MODE_3CBC or not
*
- * @var Boolean
+ * @var bool
* @access private
*/
var $mode_3cbc;
/**
- * The Crypt_DES objects
+ * The \phpseclib\Crypt\DES objects
*
* Used only if $mode_3cbc === true
*
- * @var Array
+ * @var array
* @access private
*/
var $des;
*
* $mode could be:
*
- * - CRYPT_DES_MODE_ECB
+ * - \phpseclib\Crypt\Base::MODE_ECB
*
- * - CRYPT_DES_MODE_CBC
+ * - \phpseclib\Crypt\Base::MODE_CBC
*
- * - CRYPT_DES_MODE_CTR
+ * - \phpseclib\Crypt\Base::MODE_CTR
*
- * - CRYPT_DES_MODE_CFB
+ * - \phpseclib\Crypt\Base::MODE_CFB
*
- * - CRYPT_DES_MODE_OFB
+ * - \phpseclib\Crypt\Base::MODE_OFB
*
- * - CRYPT_DES_MODE_3CBC
+ * - \phpseclib\Crypt\TripleDES::MODE_3CBC
*
- * If not explicitly set, CRYPT_DES_MODE_CBC will be used.
+ * If not explicitly set, \phpseclib\Crypt\Base::MODE_CBC will be used.
*
- * @see Crypt_DES::Crypt_DES()
- * @see Crypt_Base::Crypt_Base()
- * @param optional Integer $mode
+ * @see \phpseclib\Crypt\DES::__construct()
+ * @see \phpseclib\Crypt\Base::__construct()
+ * @param int $mode
* @access public
*/
- function Crypt_TripleDES($mode = CRYPT_DES_MODE_CBC)
+ function __construct($mode = Base::MODE_CBC)
{
switch ($mode) {
- // In case of CRYPT_DES_MODE_3CBC, we init as CRYPT_DES_MODE_CBC
+ // In case of self::MODE_3CBC, we init as CRYPT_DES_MODE_CBC
// and additional flag us internally as 3CBC
- case CRYPT_DES_MODE_3CBC:
- parent::Crypt_Base(CRYPT_DES_MODE_CBC);
+ case self::MODE_3CBC:
+ parent::__construct(Base::MODE_CBC);
$this->mode_3cbc = true;
// This three $des'es will do the 3CBC work (if $key > 64bits)
$this->des = array(
- new Crypt_DES(CRYPT_DES_MODE_CBC),
- new Crypt_DES(CRYPT_DES_MODE_CBC),
- new Crypt_DES(CRYPT_DES_MODE_CBC),
+ new DES(Base::MODE_CBC),
+ new DES(Base::MODE_CBC),
+ new DES(Base::MODE_CBC),
);
- // we're going to be doing the padding, ourselves, so disable it in the Crypt_DES objects
+ // we're going to be doing the padding, ourselves, so disable it in the \phpseclib\Crypt\DES objects
$this->des[0]->disablePadding();
$this->des[1]->disablePadding();
$this->des[2]->disablePadding();
break;
// If not 3CBC, we init as usual
default:
- parent::Crypt_Base($mode);
+ parent::__construct($mode);
}
}
+ /**
+ * Test for engine validity
+ *
+ * This is mainly just a wrapper to set things up for \phpseclib\Crypt\Base::isValidEngine()
+ *
+ * @see \phpseclib\Crypt\Base::__construct()
+ * @param int $engine
+ * @access public
+ * @return bool
+ */
+ function isValidEngine($engine)
+ {
+ if ($engine == self::ENGINE_OPENSSL) {
+ $this->cipher_name_openssl_ecb = 'des-ede3';
+ $mode = $this->_openssl_translate_mode();
+ $this->cipher_name_openssl = $mode == 'ecb' ? 'des-ede3' : 'des-ede3-' . $mode;
+ }
+
+ return parent::isValidEngine($engine);
+ }
+
/**
* Sets the initialization vector. (optional)
*
- * SetIV is not required when CRYPT_DES_MODE_ECB is being used. If not explicitly set, it'll be assumed
+ * SetIV is not required when \phpseclib\Crypt\Base::MODE_ECB is being used. If not explicitly set, it'll be assumed
* to be all zero's.
*
- * @see Crypt_Base::setIV()
+ * @see \phpseclib\Crypt\Base::setIV()
* @access public
- * @param String $iv
+ * @param string $iv
*/
function setIV($iv)
{
}
}
+ /**
+ * Sets the key length.
+ *
+ * Valid key lengths are 64, 128 and 192
+ *
+ * @see \phpseclib\Crypt\Base:setKeyLength()
+ * @access public
+ * @param int $length
+ */
+ function setKeyLength($length)
+ {
+ $length >>= 3;
+ switch (true) {
+ case $length <= 8:
+ $this->key_length = 8;
+ break;
+ case $length <= 16:
+ $this->key_length = 16;
+ break;
+ default:
+ $this->key_length = 24;
+ }
+
+ parent::setKeyLength($length);
+ }
+
/**
* Sets the key.
*
* If the key is not explicitly set, it'll be assumed to be all null bytes.
*
* @access public
- * @see Crypt_DES::setKey()
- * @see Crypt_Base::setKey()
- * @param String $key
+ * @see \phpseclib\Crypt\DES::setKey()
+ * @see \phpseclib\Crypt\Base::setKey()
+ * @param string $key
*/
function setKey($key)
{
- $length = strlen($key);
+ $length = $this->explicit_key_length ? $this->key_length : strlen($key);
if ($length > 8) {
$key = str_pad(substr($key, 0, 24), 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($key, 0, 8), 16) : substr($key, 0, 24);
+ $key = $length <= 16 ? substr_replace($key, substr($key, 0, 8), 16) : substr($key, 0, 24);
} else {
$key = str_pad($key, 8, chr(0));
}
parent::setKey($key);
- // And in case of CRYPT_DES_MODE_3CBC:
+ // And in case of self::MODE_3CBC:
// if key <= 64bits we not need the 3 $des to work,
// because we will then act as regular DES-CBC with just a <= 64bit key.
// So only if the key > 64bits (> 8 bytes) we will call setKey() for the 3 $des.
/**
* Encrypts a message.
*
- * @see Crypt_Base::encrypt()
+ * @see \phpseclib\Crypt\Base::encrypt()
* @access public
- * @param String $plaintext
- * @return String $cipertext
+ * @param string $plaintext
+ * @return string $cipertext
*/
function encrypt($plaintext)
{
// parent::en/decrypt() is able to do all the work for all modes and keylengths,
- // except for: CRYPT_DES_MODE_3CBC (inner chaining CBC) with a key > 64bits
+ // except for: self::MODE_3CBC (inner chaining CBC) with a key > 64bits
// if the key is smaller then 8, do what we'd normally do
if ($this->mode_3cbc && strlen($this->key) > 8) {
/**
* Decrypts a message.
*
- * @see Crypt_Base::decrypt()
+ * @see \phpseclib\Crypt\Base::decrypt()
* @access public
- * @param String $ciphertext
- * @return String $plaintext
+ * @param string $ciphertext
+ * @return string $plaintext
*/
function decrypt($ciphertext)
{
* outputs. The reason is due to the fact that the initialization vector's change after every encryption /
* decryption round when the continuous buffer is enabled. When it's disabled, they remain constant.
*
- * Put another way, when the continuous buffer is enabled, the state of the Crypt_DES() object changes after each
+ * Put another way, when the continuous buffer is enabled, the state of the \phpseclib\Crypt\DES() object changes after each
* encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that
* continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them),
* however, they are also less intuitive and more likely to cause you problems.
*
- * @see Crypt_Base::enableContinuousBuffer()
- * @see Crypt_TripleDES::disableContinuousBuffer()
+ * @see \phpseclib\Crypt\Base::enableContinuousBuffer()
+ * @see self::disableContinuousBuffer()
* @access public
*/
function enableContinuousBuffer()
*
* The default behavior.
*
- * @see Crypt_Base::disableContinuousBuffer()
- * @see Crypt_TripleDES::enableContinuousBuffer()
+ * @see \phpseclib\Crypt\Base::disableContinuousBuffer()
+ * @see self::enableContinuousBuffer()
* @access public
*/
function disableContinuousBuffer()
/**
* Creates the key schedule
*
- * @see Crypt_DES::_setupKey()
- * @see Crypt_Base::_setupKey()
+ * @see \phpseclib\Crypt\DES::_setupKey()
+ * @see \phpseclib\Crypt\Base::_setupKey()
* @access private
*/
function _setupKey()
// setup our key
parent::_setupKey();
}
+
+ /**
+ * Sets the internal crypt engine
+ *
+ * @see \phpseclib\Crypt\Base::__construct()
+ * @see \phpseclib\Crypt\Base::setPreferredEngine()
+ * @param int $engine
+ * @access public
+ * @return int
+ */
+ function setPreferredEngine($engine)
+ {
+ if ($this->mode_3cbc) {
+ $this->des[0]->setPreferredEngine($engine);
+ $this->des[1]->setPreferredEngine($engine);
+ $this->des[2]->setPreferredEngine($engine);
+ }
+
+ return parent::setPreferredEngine($engine);
+ }
}
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