summaryrefslogtreecommitdiff
path: root/libs/phpseclib-1.0.4/phpseclib/Crypt/RC2.php
diff options
context:
space:
mode:
Diffstat (limited to 'libs/phpseclib-1.0.4/phpseclib/Crypt/RC2.php')
-rw-r--r--libs/phpseclib-1.0.4/phpseclib/Crypt/RC2.php761
1 files changed, 0 insertions, 761 deletions
diff --git a/libs/phpseclib-1.0.4/phpseclib/Crypt/RC2.php b/libs/phpseclib-1.0.4/phpseclib/Crypt/RC2.php
deleted file mode 100644
index 97b4550..0000000
--- a/libs/phpseclib-1.0.4/phpseclib/Crypt/RC2.php
+++ /dev/null
@@ -1,761 +0,0 @@
-<?php
-
-/**
- * Pure-PHP implementation of RC2.
- *
- * Uses mcrypt, if available, and an internal implementation, otherwise.
- *
- * PHP versions 4 and 5
- *
- * Useful resources are as follows:
- *
- * - {@link http://tools.ietf.org/html/rfc2268}
- *
- * Here's a short example of how to use this library:
- * <code>
- * <?php
- * include 'Crypt/RC2.php';
- *
- * $rc2 = new Crypt_RC2();
- *
- * $rc2->setKey('abcdefgh');
- *
- * $plaintext = str_repeat('a', 1024);
- *
- * echo $rc2->decrypt($rc2->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_RC2
- * @author Patrick Monnerat <pm@datasphere.ch>
- * @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_RC2_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_RC2_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_RC2_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_RC2_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_RC2_MODE_OFB', CRYPT_MODE_OFB);
-/**#@-*/
-
-/**
- * Pure-PHP implementation of RC2.
- *
- * @package Crypt_RC2
- * @access public
- */
-class Crypt_RC2 extends Crypt_Base
-{
- /**
- * Block Length of the cipher
- *
- * @see Crypt_Base::block_size
- * @var int
- * @access private
- */
- var $block_size = 8;
-
- /**
- * The Key
- *
- * @see Crypt_Base::key
- * @see self::setKey()
- * @var string
- * @access private
- */
- var $key;
-
- /**
- * The Original (unpadded) Key
- *
- * @see Crypt_Base::key
- * @see self::setKey()
- * @see self::encrypt()
- * @see self::decrypt()
- * @var string
- * @access private
- */
- var $orig_key;
-
- /**
- * Don't truncate / null pad key
- *
- * @see Crypt_Base::_clearBuffers()
- * @var bool
- * @access private
- */
- var $skip_key_adjustment = true;
-
- /**
- * Key Length (in bytes)
- *
- * @see Crypt_RC2::setKeyLength()
- * @var int
- * @access private
- */
- var $key_length = 16; // = 128 bits
-
- /**
- * The namespace used by the cipher for its constants.
- *
- * @see Crypt_Base::const_namespace
- * @var string
- * @access private
- */
- var $const_namespace = 'RC2';
-
- /**
- * The mcrypt specific name of the cipher
- *
- * @see Crypt_Base::cipher_name_mcrypt
- * @var string
- * @access private
- */
- var $cipher_name_mcrypt = 'rc2';
-
- /**
- * Optimizing value while CFB-encrypting
- *
- * @see Crypt_Base::cfb_init_len
- * @var int
- * @access private
- */
- var $cfb_init_len = 500;
-
- /**
- * The key length in bits.
- *
- * @see self::setKeyLength()
- * @see self::setKey()
- * @var int
- * @access private
- * @internal Should be in range [1..1024].
- * @internal Changing this value after setting the key has no effect.
- */
- var $default_key_length = 1024;
-
- /**
- * The key length in bits.
- *
- * @see self::isValidEnine()
- * @see self::setKey()
- * @var int
- * @access private
- * @internal Should be in range [1..1024].
- */
- var $current_key_length;
-
- /**
- * The Key Schedule
- *
- * @see self::_setupKey()
- * @var array
- * @access private
- */
- var $keys;
-
- /**
- * Key expansion randomization table.
- * Twice the same 256-value sequence to save a modulus in key expansion.
- *
- * @see self::setKey()
- * @var array
- * @access private
- */
- var $pitable = array(
- 0xD9, 0x78, 0xF9, 0xC4, 0x19, 0xDD, 0xB5, 0xED,
- 0x28, 0xE9, 0xFD, 0x79, 0x4A, 0xA0, 0xD8, 0x9D,
- 0xC6, 0x7E, 0x37, 0x83, 0x2B, 0x76, 0x53, 0x8E,
- 0x62, 0x4C, 0x64, 0x88, 0x44, 0x8B, 0xFB, 0xA2,
- 0x17, 0x9A, 0x59, 0xF5, 0x87, 0xB3, 0x4F, 0x13,
- 0x61, 0x45, 0x6D, 0x8D, 0x09, 0x81, 0x7D, 0x32,
- 0xBD, 0x8F, 0x40, 0xEB, 0x86, 0xB7, 0x7B, 0x0B,
- 0xF0, 0x95, 0x21, 0x22, 0x5C, 0x6B, 0x4E, 0x82,
- 0x54, 0xD6, 0x65, 0x93, 0xCE, 0x60, 0xB2, 0x1C,
- 0x73, 0x56, 0xC0, 0x14, 0xA7, 0x8C, 0xF1, 0xDC,
- 0x12, 0x75, 0xCA, 0x1F, 0x3B, 0xBE, 0xE4, 0xD1,
- 0x42, 0x3D, 0xD4, 0x30, 0xA3, 0x3C, 0xB6, 0x26,
- 0x6F, 0xBF, 0x0E, 0xDA, 0x46, 0x69, 0x07, 0x57,
- 0x27, 0xF2, 0x1D, 0x9B, 0xBC, 0x94, 0x43, 0x03,
- 0xF8, 0x11, 0xC7, 0xF6, 0x90, 0xEF, 0x3E, 0xE7,
- 0x06, 0xC3, 0xD5, 0x2F, 0xC8, 0x66, 0x1E, 0xD7,
- 0x08, 0xE8, 0xEA, 0xDE, 0x80, 0x52, 0xEE, 0xF7,
- 0x84, 0xAA, 0x72, 0xAC, 0x35, 0x4D, 0x6A, 0x2A,
- 0x96, 0x1A, 0xD2, 0x71, 0x5A, 0x15, 0x49, 0x74,
- 0x4B, 0x9F, 0xD0, 0x5E, 0x04, 0x18, 0xA4, 0xEC,
- 0xC2, 0xE0, 0x41, 0x6E, 0x0F, 0x51, 0xCB, 0xCC,
- 0x24, 0x91, 0xAF, 0x50, 0xA1, 0xF4, 0x70, 0x39,
- 0x99, 0x7C, 0x3A, 0x85, 0x23, 0xB8, 0xB4, 0x7A,
- 0xFC, 0x02, 0x36, 0x5B, 0x25, 0x55, 0x97, 0x31,
- 0x2D, 0x5D, 0xFA, 0x98, 0xE3, 0x8A, 0x92, 0xAE,
- 0x05, 0xDF, 0x29, 0x10, 0x67, 0x6C, 0xBA, 0xC9,
- 0xD3, 0x00, 0xE6, 0xCF, 0xE1, 0x9E, 0xA8, 0x2C,
- 0x63, 0x16, 0x01, 0x3F, 0x58, 0xE2, 0x89, 0xA9,
- 0x0D, 0x38, 0x34, 0x1B, 0xAB, 0x33, 0xFF, 0xB0,
- 0xBB, 0x48, 0x0C, 0x5F, 0xB9, 0xB1, 0xCD, 0x2E,
- 0xC5, 0xF3, 0xDB, 0x47, 0xE5, 0xA5, 0x9C, 0x77,
- 0x0A, 0xA6, 0x20, 0x68, 0xFE, 0x7F, 0xC1, 0xAD,
- 0xD9, 0x78, 0xF9, 0xC4, 0x19, 0xDD, 0xB5, 0xED,
- 0x28, 0xE9, 0xFD, 0x79, 0x4A, 0xA0, 0xD8, 0x9D,
- 0xC6, 0x7E, 0x37, 0x83, 0x2B, 0x76, 0x53, 0x8E,
- 0x62, 0x4C, 0x64, 0x88, 0x44, 0x8B, 0xFB, 0xA2,
- 0x17, 0x9A, 0x59, 0xF5, 0x87, 0xB3, 0x4F, 0x13,
- 0x61, 0x45, 0x6D, 0x8D, 0x09, 0x81, 0x7D, 0x32,
- 0xBD, 0x8F, 0x40, 0xEB, 0x86, 0xB7, 0x7B, 0x0B,
- 0xF0, 0x95, 0x21, 0x22, 0x5C, 0x6B, 0x4E, 0x82,
- 0x54, 0xD6, 0x65, 0x93, 0xCE, 0x60, 0xB2, 0x1C,
- 0x73, 0x56, 0xC0, 0x14, 0xA7, 0x8C, 0xF1, 0xDC,
- 0x12, 0x75, 0xCA, 0x1F, 0x3B, 0xBE, 0xE4, 0xD1,
- 0x42, 0x3D, 0xD4, 0x30, 0xA3, 0x3C, 0xB6, 0x26,
- 0x6F, 0xBF, 0x0E, 0xDA, 0x46, 0x69, 0x07, 0x57,
- 0x27, 0xF2, 0x1D, 0x9B, 0xBC, 0x94, 0x43, 0x03,
- 0xF8, 0x11, 0xC7, 0xF6, 0x90, 0xEF, 0x3E, 0xE7,
- 0x06, 0xC3, 0xD5, 0x2F, 0xC8, 0x66, 0x1E, 0xD7,
- 0x08, 0xE8, 0xEA, 0xDE, 0x80, 0x52, 0xEE, 0xF7,
- 0x84, 0xAA, 0x72, 0xAC, 0x35, 0x4D, 0x6A, 0x2A,
- 0x96, 0x1A, 0xD2, 0x71, 0x5A, 0x15, 0x49, 0x74,
- 0x4B, 0x9F, 0xD0, 0x5E, 0x04, 0x18, 0xA4, 0xEC,
- 0xC2, 0xE0, 0x41, 0x6E, 0x0F, 0x51, 0xCB, 0xCC,
- 0x24, 0x91, 0xAF, 0x50, 0xA1, 0xF4, 0x70, 0x39,
- 0x99, 0x7C, 0x3A, 0x85, 0x23, 0xB8, 0xB4, 0x7A,
- 0xFC, 0x02, 0x36, 0x5B, 0x25, 0x55, 0x97, 0x31,
- 0x2D, 0x5D, 0xFA, 0x98, 0xE3, 0x8A, 0x92, 0xAE,
- 0x05, 0xDF, 0x29, 0x10, 0x67, 0x6C, 0xBA, 0xC9,
- 0xD3, 0x00, 0xE6, 0xCF, 0xE1, 0x9E, 0xA8, 0x2C,
- 0x63, 0x16, 0x01, 0x3F, 0x58, 0xE2, 0x89, 0xA9,
- 0x0D, 0x38, 0x34, 0x1B, 0xAB, 0x33, 0xFF, 0xB0,
- 0xBB, 0x48, 0x0C, 0x5F, 0xB9, 0xB1, 0xCD, 0x2E,
- 0xC5, 0xF3, 0xDB, 0x47, 0xE5, 0xA5, 0x9C, 0x77,
- 0x0A, 0xA6, 0x20, 0x68, 0xFE, 0x7F, 0xC1, 0xAD
- );
-
- /**
- * Inverse key expansion randomization table.
- *
- * @see self::setKey()
- * @var array
- * @access private
- */
- var $invpitable = array(
- 0xD1, 0xDA, 0xB9, 0x6F, 0x9C, 0xC8, 0x78, 0x66,
- 0x80, 0x2C, 0xF8, 0x37, 0xEA, 0xE0, 0x62, 0xA4,
- 0xCB, 0x71, 0x50, 0x27, 0x4B, 0x95, 0xD9, 0x20,
- 0x9D, 0x04, 0x91, 0xE3, 0x47, 0x6A, 0x7E, 0x53,
- 0xFA, 0x3A, 0x3B, 0xB4, 0xA8, 0xBC, 0x5F, 0x68,
- 0x08, 0xCA, 0x8F, 0x14, 0xD7, 0xC0, 0xEF, 0x7B,
- 0x5B, 0xBF, 0x2F, 0xE5, 0xE2, 0x8C, 0xBA, 0x12,
- 0xE1, 0xAF, 0xB2, 0x54, 0x5D, 0x59, 0x76, 0xDB,
- 0x32, 0xA2, 0x58, 0x6E, 0x1C, 0x29, 0x64, 0xF3,
- 0xE9, 0x96, 0x0C, 0x98, 0x19, 0x8D, 0x3E, 0x26,
- 0xAB, 0xA5, 0x85, 0x16, 0x40, 0xBD, 0x49, 0x67,
- 0xDC, 0x22, 0x94, 0xBB, 0x3C, 0xC1, 0x9B, 0xEB,
- 0x45, 0x28, 0x18, 0xD8, 0x1A, 0x42, 0x7D, 0xCC,
- 0xFB, 0x65, 0x8E, 0x3D, 0xCD, 0x2A, 0xA3, 0x60,
- 0xAE, 0x93, 0x8A, 0x48, 0x97, 0x51, 0x15, 0xF7,
- 0x01, 0x0B, 0xB7, 0x36, 0xB1, 0x2E, 0x11, 0xFD,
- 0x84, 0x2D, 0x3F, 0x13, 0x88, 0xB3, 0x34, 0x24,
- 0x1B, 0xDE, 0xC5, 0x1D, 0x4D, 0x2B, 0x17, 0x31,
- 0x74, 0xA9, 0xC6, 0x43, 0x6D, 0x39, 0x90, 0xBE,
- 0xC3, 0xB0, 0x21, 0x6B, 0xF6, 0x0F, 0xD5, 0x99,
- 0x0D, 0xAC, 0x1F, 0x5C, 0x9E, 0xF5, 0xF9, 0x4C,
- 0xD6, 0xDF, 0x89, 0xE4, 0x8B, 0xFF, 0xC7, 0xAA,
- 0xE7, 0xED, 0x46, 0x25, 0xB6, 0x06, 0x5E, 0x35,
- 0xB5, 0xEC, 0xCE, 0xE8, 0x6C, 0x30, 0x55, 0x61,
- 0x4A, 0xFE, 0xA0, 0x79, 0x03, 0xF0, 0x10, 0x72,
- 0x7C, 0xCF, 0x52, 0xA6, 0xA7, 0xEE, 0x44, 0xD3,
- 0x9A, 0x57, 0x92, 0xD0, 0x5A, 0x7A, 0x41, 0x7F,
- 0x0E, 0x00, 0x63, 0xF2, 0x4F, 0x05, 0x83, 0xC9,
- 0xA1, 0xD4, 0xDD, 0xC4, 0x56, 0xF4, 0xD2, 0x77,
- 0x81, 0x09, 0x82, 0x33, 0x9F, 0x07, 0x86, 0x75,
- 0x38, 0x4E, 0x69, 0xF1, 0xAD, 0x23, 0x73, 0x87,
- 0x70, 0x02, 0xC2, 0x1E, 0xB8, 0x0A, 0xFC, 0xE6
- );
-
- /**
- * 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->current_key_length != 128 || strlen($this->orig_key) < 16) {
- return false;
- }
- $this->cipher_name_openssl_ecb = 'rc2-ecb';
- $this->cipher_name_openssl = 'rc2-' . $this->_openssl_translate_mode();
- }
-
- return parent::isValidEngine($engine);
- }
-
- /**
- * Sets the key length.
- *
- * Valid key lengths are 8 to 1024.
- * Calling this function after setting the key has no effect until the next
- * Crypt_RC2::setKey() call.
- *
- * @access public
- * @param int $length in bits
- */
- function setKeyLength($length)
- {
- if ($length < 8) {
- $this->default_key_length = 8;
- } elseif ($length > 1024) {
- $this->default_key_length = 128;
- } else {
- $this->default_key_length = $length;
- }
- $this->current_key_length = $this->default_key_length;
-
- parent::setKeyLength($length);
- }
-
- /**
- * Returns the current key length
- *
- * @access public
- * @return int
- */
- function getKeyLength()
- {
- return $this->current_key_length;
- }
-
- /**
- * Sets the key.
- *
- * Keys can be of any length. RC2, itself, uses 8 to 1024 bit keys (eg.
- * strlen($key) <= 128), however, we only use the first 128 bytes if $key
- * has more then 128 bytes in it, and set $key to a single null byte if
- * it is empty.
- *
- * If the key is not explicitly set, it'll be assumed to be a single
- * null byte.
- *
- * @see Crypt_Base::setKey()
- * @access public
- * @param string $key
- * @param int $t1 optional Effective key length in bits.
- */
- function setKey($key, $t1 = 0)
- {
- $this->orig_key = $key;
-
- if ($t1 <= 0) {
- $t1 = $this->default_key_length;
- } elseif ($t1 > 1024) {
- $t1 = 1024;
- }
- $this->current_key_length = $t1;
- // Key byte count should be 1..128.
- $key = strlen($key) ? substr($key, 0, 128) : "\x00";
- $t = strlen($key);
-
- // The mcrypt RC2 implementation only supports effective key length
- // of 1024 bits. It is however possible to handle effective key
- // lengths in range 1..1024 by expanding the key and applying
- // inverse pitable mapping to the first byte before submitting it
- // to mcrypt.
-
- // Key expansion.
- $l = array_values(unpack('C*', $key));
- $t8 = ($t1 + 7) >> 3;
- $tm = 0xFF >> (8 * $t8 - $t1);
-
- // Expand key.
- $pitable = $this->pitable;
- for ($i = $t; $i < 128; $i++) {
- $l[$i] = $pitable[$l[$i - 1] + $l[$i - $t]];
- }
- $i = 128 - $t8;
- $l[$i] = $pitable[$l[$i] & $tm];
- while ($i--) {
- $l[$i] = $pitable[$l[$i + 1] ^ $l[$i + $t8]];
- }
-
- // Prepare the key for mcrypt.
- $l[0] = $this->invpitable[$l[0]];
- array_unshift($l, 'C*');
-
- parent::setKey(call_user_func_array('pack', $l));
- }
-
- /**
- * Encrypts a message.
- *
- * Mostly a wrapper for Crypt_Base::encrypt, with some additional OpenSSL handling code
- *
- * @see self::decrypt()
- * @access public
- * @param string $plaintext
- * @return string $ciphertext
- */
- function encrypt($plaintext)
- {
- if ($this->engine == CRYPT_ENGINE_OPENSSL) {
- $temp = $this->key;
- $this->key = $this->orig_key;
- $result = parent::encrypt($plaintext);
- $this->key = $temp;
- return $result;
- }
-
- return parent::encrypt($plaintext);
- }
-
- /**
- * Decrypts a message.
- *
- * Mostly a wrapper for Crypt_Base::decrypt, with some additional OpenSSL handling code
- *
- * @see self::encrypt()
- * @access public
- * @param string $ciphertext
- * @return string $plaintext
- */
- function decrypt($ciphertext)
- {
- if ($this->engine == CRYPT_ENGINE_OPENSSL) {
- $temp = $this->key;
- $this->key = $this->orig_key;
- $result = parent::decrypt($ciphertext);
- $this->key = $temp;
- return $result;
- }
-
- return parent::decrypt($ciphertext);
- }
-
- /**
- * Encrypts a block
- *
- * @see Crypt_Base::_encryptBlock()
- * @see Crypt_Base::encrypt()
- * @access private
- * @param string $in
- * @return string
- */
- function _encryptBlock($in)
- {
- list($r0, $r1, $r2, $r3) = array_values(unpack('v*', $in));
- $keys = $this->keys;
- $limit = 20;
- $actions = array($limit => 44, 44 => 64);
- $j = 0;
-
- for (;;) {
- // Mixing round.
- $r0 = (($r0 + $keys[$j++] + ((($r1 ^ $r2) & $r3) ^ $r1)) & 0xFFFF) << 1;
- $r0 |= $r0 >> 16;
- $r1 = (($r1 + $keys[$j++] + ((($r2 ^ $r3) & $r0) ^ $r2)) & 0xFFFF) << 2;
- $r1 |= $r1 >> 16;
- $r2 = (($r2 + $keys[$j++] + ((($r3 ^ $r0) & $r1) ^ $r3)) & 0xFFFF) << 3;
- $r2 |= $r2 >> 16;
- $r3 = (($r3 + $keys[$j++] + ((($r0 ^ $r1) & $r2) ^ $r0)) & 0xFFFF) << 5;
- $r3 |= $r3 >> 16;
-
- if ($j === $limit) {
- if ($limit === 64) {
- break;
- }
-
- // Mashing round.
- $r0 += $keys[$r3 & 0x3F];
- $r1 += $keys[$r0 & 0x3F];
- $r2 += $keys[$r1 & 0x3F];
- $r3 += $keys[$r2 & 0x3F];
- $limit = $actions[$limit];
- }
- }
-
- return pack('vvvv', $r0, $r1, $r2, $r3);
- }
-
- /**
- * Decrypts a block
- *
- * @see Crypt_Base::_decryptBlock()
- * @see Crypt_Base::decrypt()
- * @access private
- * @param string $in
- * @return string
- */
- function _decryptBlock($in)
- {
- list($r0, $r1, $r2, $r3) = array_values(unpack('v*', $in));
- $keys = $this->keys;
- $limit = 44;
- $actions = array($limit => 20, 20 => 0);
- $j = 64;
-
- for (;;) {
- // R-mixing round.
- $r3 = ($r3 | ($r3 << 16)) >> 5;
- $r3 = ($r3 - $keys[--$j] - ((($r0 ^ $r1) & $r2) ^ $r0)) & 0xFFFF;
- $r2 = ($r2 | ($r2 << 16)) >> 3;
- $r2 = ($r2 - $keys[--$j] - ((($r3 ^ $r0) & $r1) ^ $r3)) & 0xFFFF;
- $r1 = ($r1 | ($r1 << 16)) >> 2;
- $r1 = ($r1 - $keys[--$j] - ((($r2 ^ $r3) & $r0) ^ $r2)) & 0xFFFF;
- $r0 = ($r0 | ($r0 << 16)) >> 1;
- $r0 = ($r0 - $keys[--$j] - ((($r1 ^ $r2) & $r3) ^ $r1)) & 0xFFFF;
-
- if ($j === $limit) {
- if ($limit === 0) {
- break;
- }
-
- // R-mashing round.
- $r3 = ($r3 - $keys[$r2 & 0x3F]) & 0xFFFF;
- $r2 = ($r2 - $keys[$r1 & 0x3F]) & 0xFFFF;
- $r1 = ($r1 - $keys[$r0 & 0x3F]) & 0xFFFF;
- $r0 = ($r0 - $keys[$r3 & 0x3F]) & 0xFFFF;
- $limit = $actions[$limit];
- }
- }
-
- return pack('vvvv', $r0, $r1, $r2, $r3);
- }
-
- /**
- * Setup the CRYPT_ENGINE_MCRYPT $engine
- *
- * @see Crypt_Base::_setupMcrypt()
- * @access private
- */
- function _setupMcrypt()
- {
- if (!isset($this->key)) {
- $this->setKey('');
- }
-
- parent::_setupMcrypt();
- }
-
- /**
- * Creates the key schedule
- *
- * @see Crypt_Base::_setupKey()
- * @access private
- */
- function _setupKey()
- {
- if (!isset($this->key)) {
- $this->setKey('');
- }
-
- // Key has already been expanded in Crypt_RC2::setKey():
- // Only the first value must be altered.
- $l = unpack('Ca/Cb/v*', $this->key);
- array_unshift($l, $this->pitable[$l['a']] | ($l['b'] << 8));
- unset($l['a']);
- unset($l['b']);
- $this->keys = $l;
- }
-
- /**
- * Setup the performance-optimized function for de/encrypt()
- *
- * @see Crypt_Base::_setupInlineCrypt()
- * @access private
- */
- function _setupInlineCrypt()
- {
- $lambda_functions = &Crypt_RC2::_getLambdaFunctions();
-
- // The first 10 generated $lambda_functions will use the $keys hardcoded as integers
- // for the mixing rounds, for better inline crypt performance [~20% faster].
- // But for memory reason we have to limit those ultra-optimized $lambda_functions to an amount of 10.
- // (Currently, for Crypt_RC2, one generated $lambda_function cost on php5.5@32bit ~60kb unfreeable mem and ~100kb on php5.5@64bit)
- $gen_hi_opt_code = (bool)(count($lambda_functions) < 10);
-
- // Generation of a unique hash for our generated code
- $code_hash = "Crypt_RC2, {$this->mode}";
- if ($gen_hi_opt_code) {
- $code_hash = str_pad($code_hash, 32) . $this->_hashInlineCryptFunction($this->key);
- }
-
- // Is there a re-usable $lambda_functions in there?
- // If not, we have to create it.
- if (!isset($lambda_functions[$code_hash])) {
- // Init code for both, encrypt and decrypt.
- $init_crypt = '$keys = $self->keys;';
-
- switch (true) {
- case $gen_hi_opt_code:
- $keys = $this->keys;
- default:
- $keys = array();
- foreach ($this->keys as $k => $v) {
- $keys[$k] = '$keys[' . $k . ']';
- }
- }
-
- // $in is the current 8 bytes block which has to be en/decrypt
- $encrypt_block = $decrypt_block = '
- $in = unpack("v4", $in);
- $r0 = $in[1];
- $r1 = $in[2];
- $r2 = $in[3];
- $r3 = $in[4];
- ';
-
- // Create code for encryption.
- $limit = 20;
- $actions = array($limit => 44, 44 => 64);
- $j = 0;
-
- for (;;) {
- // Mixing round.
- $encrypt_block .= '
- $r0 = (($r0 + ' . $keys[$j++] . ' +
- ((($r1 ^ $r2) & $r3) ^ $r1)) & 0xFFFF) << 1;
- $r0 |= $r0 >> 16;
- $r1 = (($r1 + ' . $keys[$j++] . ' +
- ((($r2 ^ $r3) & $r0) ^ $r2)) & 0xFFFF) << 2;
- $r1 |= $r1 >> 16;
- $r2 = (($r2 + ' . $keys[$j++] . ' +
- ((($r3 ^ $r0) & $r1) ^ $r3)) & 0xFFFF) << 3;
- $r2 |= $r2 >> 16;
- $r3 = (($r3 + ' . $keys[$j++] . ' +
- ((($r0 ^ $r1) & $r2) ^ $r0)) & 0xFFFF) << 5;
- $r3 |= $r3 >> 16;';
-
- if ($j === $limit) {
- if ($limit === 64) {
- break;
- }
-
- // Mashing round.
- $encrypt_block .= '
- $r0 += $keys[$r3 & 0x3F];
- $r1 += $keys[$r0 & 0x3F];
- $r2 += $keys[$r1 & 0x3F];
- $r3 += $keys[$r2 & 0x3F];';
- $limit = $actions[$limit];
- }
- }
-
- $encrypt_block .= '$in = pack("v4", $r0, $r1, $r2, $r3);';
-
- // Create code for decryption.
- $limit = 44;
- $actions = array($limit => 20, 20 => 0);
- $j = 64;
-
- for (;;) {
- // R-mixing round.
- $decrypt_block .= '
- $r3 = ($r3 | ($r3 << 16)) >> 5;
- $r3 = ($r3 - ' . $keys[--$j] . ' -
- ((($r0 ^ $r1) & $r2) ^ $r0)) & 0xFFFF;
- $r2 = ($r2 | ($r2 << 16)) >> 3;
- $r2 = ($r2 - ' . $keys[--$j] . ' -
- ((($r3 ^ $r0) & $r1) ^ $r3)) & 0xFFFF;
- $r1 = ($r1 | ($r1 << 16)) >> 2;
- $r1 = ($r1 - ' . $keys[--$j] . ' -
- ((($r2 ^ $r3) & $r0) ^ $r2)) & 0xFFFF;
- $r0 = ($r0 | ($r0 << 16)) >> 1;
- $r0 = ($r0 - ' . $keys[--$j] . ' -
- ((($r1 ^ $r2) & $r3) ^ $r1)) & 0xFFFF;';
-
- if ($j === $limit) {
- if ($limit === 0) {
- break;
- }
-
- // R-mashing round.
- $decrypt_block .= '
- $r3 = ($r3 - $keys[$r2 & 0x3F]) & 0xFFFF;
- $r2 = ($r2 - $keys[$r1 & 0x3F]) & 0xFFFF;
- $r1 = ($r1 - $keys[$r0 & 0x3F]) & 0xFFFF;
- $r0 = ($r0 - $keys[$r3 & 0x3F]) & 0xFFFF;';
- $limit = $actions[$limit];
- }
- }
-
- $decrypt_block .= '$in = pack("v4", $r0, $r1, $r2, $r3);';
-
- // Creates the inline-crypt function
- $lambda_functions[$code_hash] = $this->_createInlineCryptFunction(
- array(
- 'init_crypt' => $init_crypt,
- 'encrypt_block' => $encrypt_block,
- 'decrypt_block' => $decrypt_block
- )
- );
- }
-
- // Set the inline-crypt function as callback in: $this->inline_crypt
- $this->inline_crypt = $lambda_functions[$code_hash];
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-30 17:23:35 +0000