+++ /dev/null
-<?php\r
-/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */\r
-\r
-/**\r
- * Pure-PHP implementation of DES.\r
- *\r
- * Uses mcrypt, if available, and an internal implementation, otherwise.\r
- *\r
- * PHP versions 4 and 5\r
- *\r
- * Useful resources are as follows:\r
- *\r
- * - {@link http://en.wikipedia.org/wiki/DES_supplementary_material Wikipedia: DES supplementary material}\r
- * - {@link http://www.itl.nist.gov/fipspubs/fip46-2.htm FIPS 46-2 - (DES), Data Encryption Standard}\r
- * - {@link http://www.cs.eku.edu/faculty/styer/460/Encrypt/JS-DES.html JavaScript DES Example}\r
- *\r
- * Here's a short example of how to use this library:\r
- * <code>\r
- * <?php\r
- * include('Crypt/DES.php');\r
- *\r
- * $des = new Crypt_DES();\r
- *\r
- * $des->setKey('abcdefgh');\r
- *\r
- * $size = 10 * 1024;\r
- * $plaintext = '';\r
- * for ($i = 0; $i < $size; $i++) {\r
- * $plaintext.= 'a';\r
- * }\r
- *\r
- * echo $des->decrypt($des->encrypt($plaintext));\r
- * ?>\r
- * </code>\r
- *\r
- * LICENSE: This library is free software; you can redistribute it and/or\r
- * modify it under the terms of the GNU Lesser General Public\r
- * License as published by the Free Software Foundation; either\r
- * version 2.1 of the License, or (at your option) any later version.\r
- *\r
- * This library is distributed in the hope that it will be useful,\r
- * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
- * Lesser General Public License for more details.\r
- *\r
- * You should have received a copy of the GNU Lesser General Public\r
- * License along with this library; if not, write to the Free Software\r
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,\r
- * MA 02111-1307 USA\r
- *\r
- * @category Crypt\r
- * @package Crypt_DES\r
- * @author Jim Wigginton <terrafrost@php.net>\r
- * @copyright MMVII Jim Wigginton\r
- * @license http://www.gnu.org/licenses/lgpl.txt\r
- * @version $Id: DES.php,v 1.12 2010/02/09 06:10:26 terrafrost Exp $\r
- * @link http://phpseclib.sourceforge.net\r
- */\r
-\r
-/**#@+\r
- * @access private\r
- * @see Crypt_DES::_prepareKey()\r
- * @see Crypt_DES::_processBlock()\r
- */\r
-/**\r
- * Contains array_reverse($keys[CRYPT_DES_DECRYPT])\r
- */\r
-define('CRYPT_DES_ENCRYPT', 0);\r
-/**\r
- * Contains array_reverse($keys[CRYPT_DES_ENCRYPT])\r
- */\r
-define('CRYPT_DES_DECRYPT', 1);\r
-/**#@-*/\r
-\r
-/**#@+\r
- * @access public\r
- * @see Crypt_DES::encrypt()\r
- * @see Crypt_DES::decrypt()\r
- */\r
-/**\r
- * Encrypt / decrypt using the Counter mode.\r
- *\r
- * Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.\r
- *\r
- * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29\r
- */\r
-define('CRYPT_DES_MODE_CTR', -1);\r
-/**\r
- * Encrypt / decrypt using the Electronic Code Book mode.\r
- *\r
- * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29\r
- */\r
-define('CRYPT_DES_MODE_ECB', 1);\r
-/**\r
- * Encrypt / decrypt using the Code Book Chaining mode.\r
- *\r
- * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29\r
- */\r
-define('CRYPT_DES_MODE_CBC', 2);\r
-/**#@-*/\r
-\r
-/**#@+\r
- * @access private\r
- * @see Crypt_DES::Crypt_DES()\r
- */\r
-/**\r
- * Toggles the internal implementation\r
- */\r
-define('CRYPT_DES_MODE_INTERNAL', 1);\r
-/**\r
- * Toggles the mcrypt implementation\r
- */\r
-define('CRYPT_DES_MODE_MCRYPT', 2);\r
-/**#@-*/\r
-\r
-/**\r
- * Pure-PHP implementation of DES.\r
- *\r
- * @author Jim Wigginton <terrafrost@php.net>\r
- * @version 0.1.0\r
- * @access public\r
- * @package Crypt_DES\r
- */\r
-class Crypt_DES {\r
- /**\r
- * The Key Schedule\r
- *\r
- * @see Crypt_DES::setKey()\r
- * @var Array\r
- * @access private\r
- */\r
- var $keys = "\0\0\0\0\0\0\0\0";\r
-\r
- /**\r
- * The Encryption Mode\r
- *\r
- * @see Crypt_DES::Crypt_DES()\r
- * @var Integer\r
- * @access private\r
- */\r
- var $mode;\r
-\r
- /**\r
- * Continuous Buffer status\r
- *\r
- * @see Crypt_DES::enableContinuousBuffer()\r
- * @var Boolean\r
- * @access private\r
- */\r
- var $continuousBuffer = false;\r
-\r
- /**\r
- * Padding status\r
- *\r
- * @see Crypt_DES::enablePadding()\r
- * @var Boolean\r
- * @access private\r
- */\r
- var $padding = true;\r
-\r
- /**\r
- * The Initialization Vector\r
- *\r
- * @see Crypt_DES::setIV()\r
- * @var String\r
- * @access private\r
- */\r
- var $iv = "\0\0\0\0\0\0\0\0";\r
-\r
- /**\r
- * A "sliding" Initialization Vector\r
- *\r
- * @see Crypt_DES::enableContinuousBuffer()\r
- * @var String\r
- * @access private\r
- */\r
- var $encryptIV = "\0\0\0\0\0\0\0\0";\r
-\r
- /**\r
- * A "sliding" Initialization Vector\r
- *\r
- * @see Crypt_DES::enableContinuousBuffer()\r
- * @var String\r
- * @access private\r
- */\r
- var $decryptIV = "\0\0\0\0\0\0\0\0";\r
-\r
- /**\r
- * mcrypt resource for encryption\r
- *\r
- * The mcrypt resource can be recreated every time something needs to be created or it can be created just once.\r
- * Since mcrypt operates in continuous mode, by default, it'll need to be recreated when in non-continuous mode.\r
- *\r
- * @see Crypt_AES::encrypt()\r
- * @var String\r
- * @access private\r
- */\r
- var $enmcrypt;\r
-\r
- /**\r
- * mcrypt resource for decryption\r
- *\r
- * The mcrypt resource can be recreated every time something needs to be created or it can be created just once.\r
- * Since mcrypt operates in continuous mode, by default, it'll need to be recreated when in non-continuous mode.\r
- *\r
- * @see Crypt_AES::decrypt()\r
- * @var String\r
- * @access private\r
- */\r
- var $demcrypt;\r
-\r
- /**\r
- * Does the (en|de)mcrypt resource need to be (re)initialized?\r
- *\r
- * @see setKey()\r
- * @see setIV()\r
- * @var Boolean\r
- * @access private\r
- */\r
- var $changed = true;\r
-\r
- /**\r
- * Default Constructor.\r
- *\r
- * Determines whether or not the mcrypt extension should be used. $mode should only, at present, be\r
- * CRYPT_DES_MODE_ECB or CRYPT_DES_MODE_CBC. If not explictly set, CRYPT_DES_MODE_CBC will be used.\r
- *\r
- * @param optional Integer $mode\r
- * @return Crypt_DES\r
- * @access public\r
- */\r
- function Crypt_DES($mode = CRYPT_MODE_DES_CBC)\r
- {\r
- if ( !defined('CRYPT_DES_MODE') ) {\r
- switch (true) {\r
- case extension_loaded('mcrypt'):\r
- // i'd check to see if des was supported, by doing in_array('des', mcrypt_list_algorithms('')),\r
- // but since that can be changed after the object has been created, there doesn't seem to be\r
- // a lot of point...\r
- define('CRYPT_DES_MODE', CRYPT_DES_MODE_MCRYPT);\r
- break;\r
- default:\r
- define('CRYPT_DES_MODE', CRYPT_DES_MODE_INTERNAL);\r
- }\r
- }\r
-\r
- switch ( CRYPT_DES_MODE ) {\r
- case CRYPT_DES_MODE_MCRYPT:\r
- switch ($mode) {\r
- case CRYPT_DES_MODE_ECB:\r
- $this->mode = MCRYPT_MODE_ECB;\r
- break;\r
- case CRYPT_DES_MODE_CTR:\r
- $this->mode = 'ctr';\r
- //$this->mode = in_array('ctr', mcrypt_list_modes()) ? 'ctr' : CRYPT_DES_MODE_CTR;\r
- break;\r
- case CRYPT_DES_MODE_CBC:\r
- default:\r
- $this->mode = MCRYPT_MODE_CBC;\r
- }\r
-\r
- break;\r
- default:\r
- switch ($mode) {\r
- case CRYPT_DES_MODE_ECB:\r
- case CRYPT_DES_MODE_CTR:\r
- case CRYPT_DES_MODE_CBC:\r
- $this->mode = $mode;\r
- break;\r
- default:\r
- $this->mode = CRYPT_DES_MODE_CBC;\r
- }\r
- }\r
- }\r
-\r
- /**\r
- * Sets the key.\r
- *\r
- * Keys can be of any length. DES, itself, uses 64-bit keys (eg. strlen($key) == 8), however, we\r
- * only use the first eight, if $key has more then eight characters in it, and pad $key with the\r
- * null byte if it is less then eight characters long.\r
- *\r
- * DES also requires that every eighth bit be a parity bit, however, we'll ignore that.\r
- *\r
- * If the key is not explicitly set, it'll be assumed to be all zero's.\r
- *\r
- * @access public\r
- * @param String $key\r
- */\r
- function setKey($key)\r
- {\r
- $this->keys = ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) ? substr($key, 0, 8) : $this->_prepareKey($key);\r
- $this->changed = true;\r
- }\r
-\r
- /**\r
- * Sets the initialization vector. (optional)\r
- *\r
- * SetIV is not required when CRYPT_DES_MODE_ECB is being used. If not explictly set, it'll be assumed\r
- * to be all zero's.\r
- *\r
- * @access public\r
- * @param String $iv\r
- */\r
- function setIV($iv)\r
- {\r
- $this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($iv, 0, 8), 8, chr(0));\r
- $this->changed = true;\r
- }\r
-\r
- /**\r
- * Generate CTR XOR encryption key\r
- *\r
- * Encrypt the output of this and XOR it against the ciphertext / plaintext to get the\r
- * plaintext / ciphertext in CTR mode.\r
- *\r
- * @see Crypt_DES::decrypt()\r
- * @see Crypt_DES::encrypt()\r
- * @access public\r
- * @param Integer $length\r
- * @param String $iv\r
- */\r
- function _generate_xor($length, &$iv)\r
- {\r
- $xor = '';\r
- $num_blocks = ($length + 7) >> 3;\r
- for ($i = 0; $i < $num_blocks; $i++) {\r
- $xor.= $iv;\r
- for ($j = 4; $j <= 8; $j+=4) {\r
- $temp = substr($iv, -$j, 4);\r
- switch ($temp) {\r
- case "\xFF\xFF\xFF\xFF":\r
- $iv = substr_replace($iv, "\x00\x00\x00\x00", -$j, 4);\r
- break;\r
- case "\x7F\xFF\xFF\xFF":\r
- $iv = substr_replace($iv, "\x80\x00\x00\x00", -$j, 4);\r
- break 2;\r
- default:\r
- extract(unpack('Ncount', $temp));\r
- $iv = substr_replace($iv, pack('N', $count + 1), -$j, 4);\r
- break 2;\r
- }\r
- }\r
- }\r
-\r
- return $xor;\r
- }\r
-\r
- /**\r
- * Encrypts a message.\r
- *\r
- * $plaintext will be padded with up to 8 additional bytes. Other DES implementations may or may not pad in the\r
- * same manner. Other common approaches to padding and the reasons why it's necessary are discussed in the following\r
- * URL:\r
- *\r
- * {@link http://www.di-mgt.com.au/cryptopad.html http://www.di-mgt.com.au/cryptopad.html}\r
- *\r
- * An alternative to padding is to, separately, send the length of the file. This is what SSH, in fact, does.\r
- * strlen($plaintext) will still need to be a multiple of 8, however, arbitrary values can be added to make it that\r
- * length.\r
- *\r
- * @see Crypt_DES::decrypt()\r
- * @access public\r
- * @param String $plaintext\r
- */\r
- function encrypt($plaintext)\r
- {\r
- if ($this->mode != CRYPT_DES_MODE_CTR && $this->mode != 'ctr') {\r
- $plaintext = $this->_pad($plaintext);\r
- }\r
-\r
- if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {\r
- if ($this->changed) {\r
- if (!isset($this->enmcrypt)) {\r
- $this->enmcrypt = mcrypt_module_open(MCRYPT_DES, '', $this->mode, '');\r
- }\r
- mcrypt_generic_init($this->enmcrypt, $this->keys, $this->encryptIV);\r
- $this->changed = false;\r
- }\r
-\r
- $ciphertext = mcrypt_generic($this->enmcrypt, $plaintext);\r
-\r
- if (!$this->continuousBuffer) {\r
- mcrypt_generic_init($this->enmcrypt, $this->keys, $this->encryptIV);\r
- }\r
-\r
- return $ciphertext;\r
- }\r
-\r
- if (!is_array($this->keys)) {\r
- $this->keys = $this->_prepareKey("\0\0\0\0\0\0\0\0");\r
- }\r
-\r
- $ciphertext = '';\r
- switch ($this->mode) {\r
- case CRYPT_DES_MODE_ECB:\r
- for ($i = 0; $i < strlen($plaintext); $i+=8) {\r
- $ciphertext.= $this->_processBlock(substr($plaintext, $i, 8), CRYPT_DES_ENCRYPT);\r
- }\r
- break;\r
- case CRYPT_DES_MODE_CBC:\r
- $xor = $this->encryptIV;\r
- for ($i = 0; $i < strlen($plaintext); $i+=8) {\r
- $block = substr($plaintext, $i, 8);\r
- $block = $this->_processBlock($block ^ $xor, CRYPT_DES_ENCRYPT);\r
- $xor = $block;\r
- $ciphertext.= $block;\r
- }\r
- if ($this->continuousBuffer) {\r
- $this->encryptIV = $xor;\r
- }\r
- break;\r
- case CRYPT_DES_MODE_CTR:\r
- $xor = $this->encryptIV;\r
- for ($i = 0; $i < strlen($plaintext); $i+=8) {\r
- $block = substr($plaintext, $i, 8);\r
- $key = $this->_processBlock($this->_generate_xor(8, $xor), CRYPT_DES_ENCRYPT);\r
- $ciphertext.= $block ^ $key;\r
- }\r
- if ($this->continuousBuffer) {\r
- $this->encryptIV = $xor;\r
- }\r
- }\r
-\r
- return $ciphertext;\r
- }\r
-\r
- /**\r
- * Decrypts a message.\r
- *\r
- * If strlen($ciphertext) is not a multiple of 8, null bytes will be added to the end of the string until it is.\r
- *\r
- * @see Crypt_DES::encrypt()\r
- * @access public\r
- * @param String $ciphertext\r
- */\r
- function decrypt($ciphertext)\r
- {\r
- if ($this->mode != CRYPT_DES_MODE_CTR && $this->mode != 'ctr') {\r
- // we pad with chr(0) since that's what mcrypt_generic does. to quote from http://php.net/function.mcrypt-generic :\r
- // "The data is padded with "\0" to make sure the length of the data is n * blocksize."\r
- $ciphertext = str_pad($ciphertext, (strlen($ciphertext) + 7) & 0xFFFFFFF8, chr(0));\r
- }\r
-\r
- if ( CRYPT_DES_MODE == CRYPT_DES_MODE_MCRYPT ) {\r
- if ($this->changed) {\r
- if (!isset($this->demcrypt)) {\r
- $this->demcrypt = mcrypt_module_open(MCRYPT_DES, '', $this->mode, '');\r
- }\r
- mcrypt_generic_init($this->demcrypt, $this->keys, $this->decryptIV);\r
- $this->changed = false;\r
- }\r
-\r
- $plaintext = mdecrypt_generic($this->demcrypt, $ciphertext);\r
-\r
- if (!$this->continuousBuffer) {\r
- mcrypt_generic_init($this->demcrypt, $this->keys, $this->decryptIV);\r
- }\r
-\r
- return $this->mode != 'ctr' ? $this->_unpad($plaintext) : $plaintext;\r
- }\r
-\r
- if (!is_array($this->keys)) {\r
- $this->keys = $this->_prepareKey("\0\0\0\0\0\0\0\0");\r
- }\r
-\r
- $plaintext = '';\r
- switch ($this->mode) {\r
- case CRYPT_DES_MODE_ECB:\r
- for ($i = 0; $i < strlen($ciphertext); $i+=8) {\r
- $plaintext.= $this->_processBlock(substr($ciphertext, $i, 8), CRYPT_DES_DECRYPT);\r
- }\r
- break;\r
- case CRYPT_DES_MODE_CBC:\r
- $xor = $this->decryptIV;\r
- for ($i = 0; $i < strlen($ciphertext); $i+=8) {\r
- $block = substr($ciphertext, $i, 8);\r
- $plaintext.= $this->_processBlock($block, CRYPT_DES_DECRYPT) ^ $xor;\r
- $xor = $block;\r
- }\r
- if ($this->continuousBuffer) {\r
- $this->decryptIV = $xor;\r
- }\r
- break;\r
- case CRYPT_DES_MODE_CTR:\r
- $xor = $this->decryptIV;\r
- for ($i = 0; $i < strlen($ciphertext); $i+=8) {\r
- $block = substr($ciphertext, $i, 8);\r
- $key = $this->_processBlock($this->_generate_xor(8, $xor), CRYPT_DES_ENCRYPT);\r
- $plaintext.= $block ^ $key;\r
- }\r
- if ($this->continuousBuffer) {\r
- $this->decryptIV = $xor;\r
- }\r
- }\r
-\r
- return $this->mode != CRYPT_DES_MODE_CTR ? $this->_unpad($plaintext) : $plaintext;\r
- }\r
-\r
- /**\r
- * Treat consecutive "packets" as if they are a continuous buffer.\r
- *\r
- * Say you have a 16-byte plaintext $plaintext. Using the default behavior, the two following code snippets\r
- * will yield different outputs:\r
- *\r
- * <code>\r
- * echo $des->encrypt(substr($plaintext, 0, 8));\r
- * echo $des->encrypt(substr($plaintext, 8, 8));\r
- * </code>\r
- * <code>\r
- * echo $des->encrypt($plaintext);\r
- * </code>\r
- *\r
- * The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates\r
- * another, as demonstrated with the following:\r
- *\r
- * <code>\r
- * $des->encrypt(substr($plaintext, 0, 8));\r
- * echo $des->decrypt($des->encrypt(substr($plaintext, 8, 8)));\r
- * </code>\r
- * <code>\r
- * echo $des->decrypt($des->encrypt(substr($plaintext, 8, 8)));\r
- * </code>\r
- *\r
- * With the continuous buffer disabled, these would yield the same output. With it enabled, they yield different\r
- * outputs. The reason is due to the fact that the initialization vector's change after every encryption /\r
- * decryption round when the continuous buffer is enabled. When it's disabled, they remain constant.\r
- *\r
- * Put another way, when the continuous buffer is enabled, the state of the Crypt_DES() object changes after each\r
- * encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that\r
- * continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them),\r
- * however, they are also less intuitive and more likely to cause you problems.\r
- *\r
- * @see Crypt_DES::disableContinuousBuffer()\r
- * @access public\r
- */\r
- function enableContinuousBuffer()\r
- {\r
- $this->continuousBuffer = true;\r
- }\r
-\r
- /**\r
- * Treat consecutive packets as if they are a discontinuous buffer.\r
- *\r
- * The default behavior.\r
- *\r
- * @see Crypt_DES::enableContinuousBuffer()\r
- * @access public\r
- */\r
- function disableContinuousBuffer()\r
- {\r
- $this->continuousBuffer = false;\r
- $this->encryptIV = $this->iv;\r
- $this->decryptIV = $this->iv;\r
- }\r
-\r
- /**\r
- * Pad "packets".\r
- *\r
- * DES works by encrypting eight bytes at a time. If you ever need to encrypt or decrypt something that's not\r
- * a multiple of eight, it becomes necessary to pad the input so that it's length is a multiple of eight.\r
- *\r
- * Padding is enabled by default. Sometimes, however, it is undesirable to pad strings. Such is the case in SSH1,\r
- * where "packets" are padded with random bytes before being encrypted. Unpad these packets and you risk stripping\r
- * away characters that shouldn't be stripped away. (SSH knows how many bytes are added because the length is\r
- * transmitted separately)\r
- *\r
- * @see Crypt_DES::disablePadding()\r
- * @access public\r
- */\r
- function enablePadding()\r
- {\r
- $this->padding = true;\r
- }\r
-\r
- /**\r
- * Do not pad packets.\r
- *\r
- * @see Crypt_DES::enablePadding()\r
- * @access public\r
- */\r
- function disablePadding()\r
- {\r
- $this->padding = false;\r
- }\r
-\r
- /**\r
- * Pads a string\r
- *\r
- * Pads a string using the RSA PKCS padding standards so that its length is a multiple of the blocksize (8).\r
- * 8 - (strlen($text) & 7) bytes are added, each of which is equal to chr(8 - (strlen($text) & 7)\r
- *\r
- * If padding is disabled and $text is not a multiple of the blocksize, the string will be padded regardless\r
- * and padding will, hence forth, be enabled.\r
- *\r
- * @see Crypt_DES::_unpad()\r
- * @access private\r
- */\r
- function _pad($text)\r
- {\r
- $length = strlen($text);\r
-\r
- if (!$this->padding) {\r
- if (($length & 7) == 0) {\r
- return $text;\r
- } else {\r
- user_error("The plaintext's length ($length) is not a multiple of the block size (8)", E_USER_NOTICE);\r
- $this->padding = true;\r
- }\r
- }\r
-\r
- $pad = 8 - ($length & 7);\r
- return str_pad($text, $length + $pad, chr($pad));\r
- }\r
-\r
- /**\r
- * Unpads a string\r
- *\r
- * If padding is enabled and the reported padding length is invalid the encryption key will be assumed to be wrong\r
- * and false will be returned.\r
- *\r
- * @see Crypt_DES::_pad()\r
- * @access private\r
- */\r
- function _unpad($text)\r
- {\r
- if (!$this->padding) {\r
- return $text;\r
- }\r
-\r
- $length = ord($text[strlen($text) - 1]);\r
-\r
- if (!$length || $length > 8) {\r
- return false;\r
- }\r
-\r
- return substr($text, 0, -$length);\r
- }\r
-\r
- /**\r
- * Encrypts or decrypts a 64-bit block\r
- *\r
- * $mode should be either CRYPT_DES_ENCRYPT or CRYPT_DES_DECRYPT. See\r
- * {@link http://en.wikipedia.org/wiki/Image:Feistel.png Feistel.png} to get a general\r
- * idea of what this function does.\r
- *\r
- * @access private\r
- * @param String $block\r
- * @param Integer $mode\r
- * @return String\r
- */\r
- function _processBlock($block, $mode)\r
- {\r
- // s-boxes. in the official DES docs, they're described as being matrices that\r
- // one accesses by using the first and last bits to determine the row and the\r
- // middle four bits to determine the column. in this implementation, they've\r
- // been converted to vectors\r
- static $sbox = array(\r
- array(\r
- 14, 0, 4, 15, 13, 7, 1, 4, 2, 14, 15, 2, 11, 13, 8, 1,\r
- 3, 10 ,10, 6, 6, 12, 12, 11, 5, 9, 9, 5, 0, 3, 7, 8,\r
- 4, 15, 1, 12, 14, 8, 8, 2, 13, 4, 6, 9, 2, 1, 11, 7,\r
- 15, 5, 12, 11, 9, 3, 7, 14, 3, 10, 10, 0, 5, 6, 0, 13\r
- ),\r
- array(\r
- 15, 3, 1, 13, 8, 4, 14, 7, 6, 15, 11, 2, 3, 8, 4, 14,\r
- 9, 12, 7, 0, 2, 1, 13, 10, 12, 6, 0, 9, 5, 11, 10, 5,\r
- 0, 13, 14, 8, 7, 10, 11, 1, 10, 3, 4, 15, 13, 4, 1, 2,\r
- 5, 11, 8, 6, 12, 7, 6, 12, 9, 0, 3, 5, 2, 14, 15, 9\r
- ),\r
- array(\r
- 10, 13, 0, 7, 9, 0, 14, 9, 6, 3, 3, 4, 15, 6, 5, 10,\r
- 1, 2, 13, 8, 12, 5, 7, 14, 11, 12, 4, 11, 2, 15, 8, 1,\r
- 13, 1, 6, 10, 4, 13, 9, 0, 8, 6, 15, 9, 3, 8, 0, 7,\r
- 11, 4, 1, 15, 2, 14, 12, 3, 5, 11, 10, 5, 14, 2, 7, 12\r
- ),\r
- array(\r
- 7, 13, 13, 8, 14, 11, 3, 5, 0, 6, 6, 15, 9, 0, 10, 3,\r
- 1, 4, 2, 7, 8, 2, 5, 12, 11, 1, 12, 10, 4, 14, 15, 9,\r
- 10, 3, 6, 15, 9, 0, 0, 6, 12, 10, 11, 1, 7, 13, 13, 8,\r
- 15, 9, 1, 4, 3, 5, 14, 11, 5, 12, 2, 7, 8, 2, 4, 14\r
- ),\r
- array(\r
- 2, 14, 12, 11, 4, 2, 1, 12, 7, 4, 10, 7, 11, 13, 6, 1,\r
- 8, 5, 5, 0, 3, 15, 15, 10, 13, 3, 0, 9, 14, 8, 9, 6,\r
- 4, 11, 2, 8, 1, 12, 11, 7, 10, 1, 13, 14, 7, 2, 8, 13,\r
- 15, 6, 9, 15, 12, 0, 5, 9, 6, 10, 3, 4, 0, 5, 14, 3\r
- ),\r
- array(\r
- 12, 10, 1, 15, 10, 4, 15, 2, 9, 7, 2, 12, 6, 9, 8, 5,\r
- 0, 6, 13, 1, 3, 13, 4, 14, 14, 0, 7, 11, 5, 3, 11, 8,\r
- 9, 4, 14, 3, 15, 2, 5, 12, 2, 9, 8, 5, 12, 15, 3, 10,\r
- 7, 11, 0, 14, 4, 1, 10, 7, 1, 6, 13, 0, 11, 8, 6, 13\r
- ),\r
- array(\r
- 4, 13, 11, 0, 2, 11, 14, 7, 15, 4, 0, 9, 8, 1, 13, 10,\r
- 3, 14, 12, 3, 9, 5, 7, 12, 5, 2, 10, 15, 6, 8, 1, 6,\r
- 1, 6, 4, 11, 11, 13, 13, 8, 12, 1, 3, 4, 7, 10, 14, 7,\r
- 10, 9, 15, 5, 6, 0, 8, 15, 0, 14, 5, 2, 9, 3, 2, 12\r
- ),\r
- array(\r
- 13, 1, 2, 15, 8, 13, 4, 8, 6, 10, 15, 3, 11, 7, 1, 4,\r
- 10, 12, 9, 5, 3, 6, 14, 11, 5, 0, 0, 14, 12, 9, 7, 2,\r
- 7, 2, 11, 1, 4, 14, 1, 7, 9, 4, 12, 10, 14, 8, 2, 13,\r
- 0, 15, 6, 12, 10, 9, 13, 0, 15, 3, 3, 5, 5, 6, 8, 11\r
- )\r
- );\r
-\r
- $keys = $this->keys;\r
-\r
- $temp = unpack('Na/Nb', $block);\r
- $block = array($temp['a'], $temp['b']);\r
-\r
- // because php does arithmetic right shifts, if the most significant bits are set, right\r
- // shifting those into the correct position will add 1's - not 0's. this will intefere\r
- // with the | operation unless a second & is done. so we isolate these bits and left shift\r
- // them into place. we then & each block with 0x7FFFFFFF to prevennt 1's from being added\r
- // for any other shifts.\r
- $msb = array(\r
- ($block[0] >> 31) & 1,\r
- ($block[1] >> 31) & 1\r
- );\r
- $block[0] &= 0x7FFFFFFF;\r
- $block[1] &= 0x7FFFFFFF;\r
-\r
- // we isolate the appropriate bit in the appropriate integer and shift as appropriate. in\r
- // some cases, there are going to be multiple bits in the same integer that need to be shifted\r
- // in the same way. we combine those into one shift operation.\r
- $block = array(\r
- (($block[1] & 0x00000040) << 25) | (($block[1] & 0x00004000) << 16) |\r
- (($block[1] & 0x00400001) << 7) | (($block[1] & 0x40000100) >> 2) |\r
- (($block[0] & 0x00000040) << 21) | (($block[0] & 0x00004000) << 12) |\r
- (($block[0] & 0x00400001) << 3) | (($block[0] & 0x40000100) >> 6) |\r
- (($block[1] & 0x00000010) << 19) | (($block[1] & 0x00001000) << 10) |\r
- (($block[1] & 0x00100000) << 1) | (($block[1] & 0x10000000) >> 8) |\r
- (($block[0] & 0x00000010) << 15) | (($block[0] & 0x00001000) << 6) |\r
- (($block[0] & 0x00100000) >> 3) | (($block[0] & 0x10000000) >> 12) |\r
- (($block[1] & 0x00000004) << 13) | (($block[1] & 0x00000400) << 4) |\r
- (($block[1] & 0x00040000) >> 5) | (($block[1] & 0x04000000) >> 14) |\r
- (($block[0] & 0x00000004) << 9) | ( $block[0] & 0x00000400 ) |\r
- (($block[0] & 0x00040000) >> 9) | (($block[0] & 0x04000000) >> 18) |\r
- (($block[1] & 0x00010000) >> 11) | (($block[1] & 0x01000000) >> 20) |\r
- (($block[0] & 0x00010000) >> 15) | (($block[0] & 0x01000000) >> 24)\r
- ,\r
- (($block[1] & 0x00000080) << 24) | (($block[1] & 0x00008000) << 15) |\r
- (($block[1] & 0x00800002) << 6) | (($block[0] & 0x00000080) << 20) |\r
- (($block[0] & 0x00008000) << 11) | (($block[0] & 0x00800002) << 2) |\r
- (($block[1] & 0x00000020) << 18) | (($block[1] & 0x00002000) << 9) |\r
- ( $block[1] & 0x00200000 ) | (($block[1] & 0x20000000) >> 9) |\r
- (($block[0] & 0x00000020) << 14) | (($block[0] & 0x00002000) << 5) |\r
- (($block[0] & 0x00200000) >> 4) | (($block[0] & 0x20000000) >> 13) |\r
- (($block[1] & 0x00000008) << 12) | (($block[1] & 0x00000800) << 3) |\r
- (($block[1] & 0x00080000) >> 6) | (($block[1] & 0x08000000) >> 15) |\r
- (($block[0] & 0x00000008) << 8) | (($block[0] & 0x00000800) >> 1) |\r
- (($block[0] & 0x00080000) >> 10) | (($block[0] & 0x08000000) >> 19) |\r
- (($block[1] & 0x00000200) >> 3) | (($block[0] & 0x00000200) >> 7) |\r
- (($block[1] & 0x00020000) >> 12) | (($block[1] & 0x02000000) >> 21) |\r
- (($block[0] & 0x00020000) >> 16) | (($block[0] & 0x02000000) >> 25) |\r
- ($msb[1] << 28) | ($msb[0] << 24)\r
- );\r
-\r
- for ($i = 0; $i < 16; $i++) {\r
- // start of "the Feistel (F) function" - see the following URL:\r
- // http://en.wikipedia.org/wiki/Image:Data_Encryption_Standard_InfoBox_Diagram.png\r
- $temp = (($sbox[0][((($block[1] >> 27) & 0x1F) | (($block[1] & 1) << 5)) ^ $keys[$mode][$i][0]]) << 28)\r
- | (($sbox[1][(($block[1] & 0x1F800000) >> 23) ^ $keys[$mode][$i][1]]) << 24)\r
- | (($sbox[2][(($block[1] & 0x01F80000) >> 19) ^ $keys[$mode][$i][2]]) << 20)\r
- | (($sbox[3][(($block[1] & 0x001F8000) >> 15) ^ $keys[$mode][$i][3]]) << 16)\r
- | (($sbox[4][(($block[1] & 0x0001F800) >> 11) ^ $keys[$mode][$i][4]]) << 12)\r
- | (($sbox[5][(($block[1] & 0x00001F80) >> 7) ^ $keys[$mode][$i][5]]) << 8)\r
- | (($sbox[6][(($block[1] & 0x000001F8) >> 3) ^ $keys[$mode][$i][6]]) << 4)\r
- | ( $sbox[7][((($block[1] & 0x1F) << 1) | (($block[1] >> 31) & 1)) ^ $keys[$mode][$i][7]]);\r
-\r
- $msb = ($temp >> 31) & 1;\r
- $temp &= 0x7FFFFFFF;\r
- $newBlock = (($temp & 0x00010000) << 15) | (($temp & 0x02020120) << 5)\r
- | (($temp & 0x00001800) << 17) | (($temp & 0x01000000) >> 10)\r
- | (($temp & 0x00000008) << 24) | (($temp & 0x00100000) << 6)\r
- | (($temp & 0x00000010) << 21) | (($temp & 0x00008000) << 9)\r
- | (($temp & 0x00000200) << 12) | (($temp & 0x10000000) >> 27)\r
- | (($temp & 0x00000040) << 14) | (($temp & 0x08000000) >> 8)\r
- | (($temp & 0x00004000) << 4) | (($temp & 0x00000002) << 16)\r
- | (($temp & 0x00442000) >> 6) | (($temp & 0x40800000) >> 15)\r
- | (($temp & 0x00000001) << 11) | (($temp & 0x20000000) >> 20)\r
- | (($temp & 0x00080000) >> 13) | (($temp & 0x00000004) << 3)\r
- | (($temp & 0x04000000) >> 22) | (($temp & 0x00000480) >> 7)\r
- | (($temp & 0x00200000) >> 19) | ($msb << 23);\r
- // end of "the Feistel (F) function" - $newBlock is F's output\r
-\r
- $temp = $block[1];\r
- $block[1] = $block[0] ^ $newBlock;\r
- $block[0] = $temp;\r
- }\r
-\r
- $msb = array(\r
- ($block[0] >> 31) & 1,\r
- ($block[1] >> 31) & 1\r
- );\r
- $block[0] &= 0x7FFFFFFF;\r
- $block[1] &= 0x7FFFFFFF;\r
-\r
- $block = array(\r
- (($block[0] & 0x01000004) << 7) | (($block[1] & 0x01000004) << 6) |\r
- (($block[0] & 0x00010000) << 13) | (($block[1] & 0x00010000) << 12) |\r
- (($block[0] & 0x00000100) << 19) | (($block[1] & 0x00000100) << 18) |\r
- (($block[0] & 0x00000001) << 25) | (($block[1] & 0x00000001) << 24) |\r
- (($block[0] & 0x02000008) >> 2) | (($block[1] & 0x02000008) >> 3) |\r
- (($block[0] & 0x00020000) << 4) | (($block[1] & 0x00020000) << 3) |\r
- (($block[0] & 0x00000200) << 10) | (($block[1] & 0x00000200) << 9) |\r
- (($block[0] & 0x00000002) << 16) | (($block[1] & 0x00000002) << 15) |\r
- (($block[0] & 0x04000000) >> 11) | (($block[1] & 0x04000000) >> 12) |\r
- (($block[0] & 0x00040000) >> 5) | (($block[1] & 0x00040000) >> 6) |\r
- (($block[0] & 0x00000400) << 1) | ( $block[1] & 0x00000400 ) |\r
- (($block[0] & 0x08000000) >> 20) | (($block[1] & 0x08000000) >> 21) |\r
- (($block[0] & 0x00080000) >> 14) | (($block[1] & 0x00080000) >> 15) |\r
- (($block[0] & 0x00000800) >> 8) | (($block[1] & 0x00000800) >> 9)\r
- ,\r
- (($block[0] & 0x10000040) << 3) | (($block[1] & 0x10000040) << 2) |\r
- (($block[0] & 0x00100000) << 9) | (($block[1] & 0x00100000) << 8) |\r
- (($block[0] & 0x00001000) << 15) | (($block[1] & 0x00001000) << 14) |\r
- (($block[0] & 0x00000010) << 21) | (($block[1] & 0x00000010) << 20) |\r
- (($block[0] & 0x20000080) >> 6) | (($block[1] & 0x20000080) >> 7) |\r
- ( $block[0] & 0x00200000 ) | (($block[1] & 0x00200000) >> 1) |\r
- (($block[0] & 0x00002000) << 6) | (($block[1] & 0x00002000) << 5) |\r
- (($block[0] & 0x00000020) << 12) | (($block[1] & 0x00000020) << 11) |\r
- (($block[0] & 0x40000000) >> 15) | (($block[1] & 0x40000000) >> 16) |\r
- (($block[0] & 0x00400000) >> 9) | (($block[1] & 0x00400000) >> 10) |\r
- (($block[0] & 0x00004000) >> 3) | (($block[1] & 0x00004000) >> 4) |\r
- (($block[0] & 0x00800000) >> 18) | (($block[1] & 0x00800000) >> 19) |\r
- (($block[0] & 0x00008000) >> 12) | (($block[1] & 0x00008000) >> 13) |\r
- ($msb[0] << 7) | ($msb[1] << 6)\r
- );\r
-\r
- return pack('NN', $block[0], $block[1]);\r
- }\r
-\r
- /**\r
- * Creates the key schedule.\r
- *\r
- * @access private\r
- * @param String $key\r
- * @return Array\r
- */\r
- function _prepareKey($key)\r
- {\r
- static $shifts = array( // number of key bits shifted per round\r
- 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1\r
- );\r
-\r
- // pad the key and remove extra characters as appropriate.\r
- $key = str_pad(substr($key, 0, 8), 8, chr(0));\r
-\r
- $temp = unpack('Na/Nb', $key);\r
- $key = array($temp['a'], $temp['b']);\r
- $msb = array(\r
- ($key[0] >> 31) & 1,\r
- ($key[1] >> 31) & 1\r
- );\r
- $key[0] &= 0x7FFFFFFF;\r
- $key[1] &= 0x7FFFFFFF;\r
-\r
- $key = array(\r
- (($key[1] & 0x00000002) << 26) | (($key[1] & 0x00000204) << 17) |\r
- (($key[1] & 0x00020408) << 8) | (($key[1] & 0x02040800) >> 1) |\r
- (($key[0] & 0x00000002) << 22) | (($key[0] & 0x00000204) << 13) |\r
- (($key[0] & 0x00020408) << 4) | (($key[0] & 0x02040800) >> 5) |\r
- (($key[1] & 0x04080000) >> 10) | (($key[0] & 0x04080000) >> 14) |\r
- (($key[1] & 0x08000000) >> 19) | (($key[0] & 0x08000000) >> 23) |\r
- (($key[0] & 0x00000010) >> 1) | (($key[0] & 0x00001000) >> 10) |\r
- (($key[0] & 0x00100000) >> 19) | (($key[0] & 0x10000000) >> 28)\r
- ,\r
- (($key[1] & 0x00000080) << 20) | (($key[1] & 0x00008000) << 11) |\r
- (($key[1] & 0x00800000) << 2) | (($key[0] & 0x00000080) << 16) |\r
- (($key[0] & 0x00008000) << 7) | (($key[0] & 0x00800000) >> 2) |\r
- (($key[1] & 0x00000040) << 13) | (($key[1] & 0x00004000) << 4) |\r
- (($key[1] & 0x00400000) >> 5) | (($key[1] & 0x40000000) >> 14) |\r
- (($key[0] & 0x00000040) << 9) | ( $key[0] & 0x00004000 ) |\r
- (($key[0] & 0x00400000) >> 9) | (($key[0] & 0x40000000) >> 18) |\r
- (($key[1] & 0x00000020) << 6) | (($key[1] & 0x00002000) >> 3) |\r
- (($key[1] & 0x00200000) >> 12) | (($key[1] & 0x20000000) >> 21) |\r
- (($key[0] & 0x00000020) << 2) | (($key[0] & 0x00002000) >> 7) |\r
- (($key[0] & 0x00200000) >> 16) | (($key[0] & 0x20000000) >> 25) |\r
- (($key[1] & 0x00000010) >> 1) | (($key[1] & 0x00001000) >> 10) |\r
- (($key[1] & 0x00100000) >> 19) | (($key[1] & 0x10000000) >> 28) |\r
- ($msb[1] << 24) | ($msb[0] << 20)\r
- ); \r
-\r
- $keys = array();\r
- for ($i = 0; $i < 16; $i++) {\r
- $key[0] <<= $shifts[$i];\r
- $temp = ($key[0] & 0xF0000000) >> 28;\r
- $key[0] = ($key[0] | $temp) & 0x0FFFFFFF;\r
-\r
- $key[1] <<= $shifts[$i];\r
- $temp = ($key[1] & 0xF0000000) >> 28;\r
- $key[1] = ($key[1] | $temp) & 0x0FFFFFFF;\r
-\r
- $temp = array(\r
- (($key[1] & 0x00004000) >> 9) | (($key[1] & 0x00000800) >> 7) |\r
- (($key[1] & 0x00020000) >> 14) | (($key[1] & 0x00000010) >> 2) |\r
- (($key[1] & 0x08000000) >> 26) | (($key[1] & 0x00800000) >> 23)\r
- ,\r
- (($key[1] & 0x02400000) >> 20) | (($key[1] & 0x00000001) << 4) |\r
- (($key[1] & 0x00002000) >> 10) | (($key[1] & 0x00040000) >> 18) |\r
- (($key[1] & 0x00000080) >> 6)\r
- ,\r
- ( $key[1] & 0x00000020 ) | (($key[1] & 0x00000200) >> 5) |\r
- (($key[1] & 0x00010000) >> 13) | (($key[1] & 0x01000000) >> 22) |\r
- (($key[1] & 0x00000004) >> 1) | (($key[1] & 0x00100000) >> 20)\r
- ,\r
- (($key[1] & 0x00001000) >> 7) | (($key[1] & 0x00200000) >> 17) |\r
- (($key[1] & 0x00000002) << 2) | (($key[1] & 0x00000100) >> 6) |\r
- (($key[1] & 0x00008000) >> 14) | (($key[1] & 0x04000000) >> 26)\r
- ,\r
- (($key[0] & 0x00008000) >> 10) | ( $key[0] & 0x00000010 ) |\r
- (($key[0] & 0x02000000) >> 22) | (($key[0] & 0x00080000) >> 17) |\r
- (($key[0] & 0x00000200) >> 8) | (($key[0] & 0x00000002) >> 1)\r
- ,\r
- (($key[0] & 0x04000000) >> 21) | (($key[0] & 0x00010000) >> 12) |\r
- (($key[0] & 0x00000020) >> 2) | (($key[0] & 0x00000800) >> 9) |\r
- (($key[0] & 0x00800000) >> 22) | (($key[0] & 0x00000100) >> 8)\r
- ,\r
- (($key[0] & 0x00001000) >> 7) | (($key[0] & 0x00000088) >> 3) |\r
- (($key[0] & 0x00020000) >> 14) | (($key[0] & 0x00000001) << 2) |\r
- (($key[0] & 0x00400000) >> 21)\r
- ,\r
- (($key[0] & 0x00000400) >> 5) | (($key[0] & 0x00004000) >> 10) |\r
- (($key[0] & 0x00000040) >> 3) | (($key[0] & 0x00100000) >> 18) |\r
- (($key[0] & 0x08000000) >> 26) | (($key[0] & 0x01000000) >> 24)\r
- );\r
-\r
- $keys[] = $temp;\r
- }\r
-\r
- $temp = array(\r
- CRYPT_DES_ENCRYPT => $keys,\r
- CRYPT_DES_DECRYPT => array_reverse($keys)\r
- );\r
-\r
- return $temp;\r
- }\r
-}\r
-\r
-// vim: ts=4:sw=4:et:\r
-// vim6: fdl=1:
\ No newline at end of file
projects / friendica.git / blobdiff