Source of file rc4crypt.php
Size: 2,537 Bytes - Last Modified: 2021-12-24T06:46:12+00:00
/var/www/docs.ssmods.com/process/src/thirdparty/rc4crypt.php
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687 | <?php // ====================================================================================== // RC4 ENCRYPTION CLASS // Do not modify. // ====================================================================================== /** * RC4Crypt 3.2 * * RC4Crypt is a petite library that allows you to use RC4 * encryption easily in PHP. It's OO and can produce outputs * in binary and hex. * * (C) Copyright 2006 Mukul Sabharwal [http://mjsabby.com] * All Rights Reserved * * @link http://rc4crypt.devhome.org * @author Mukul Sabharwal <mjsabby@gmail.com> * @version $Id: class.rc4crypt.php,v 3.2 2006/03/10 05:47:24 mukul Exp $ * @copyright Copyright © 2006 Mukul Sabharwal * @license http://www.gnu.org/copyleft/gpl.html * @package RC4Crypt */ /** * RC4 Class * @package RC4Crypt */ class rc4crypt { /** * The symmetric encryption function * * @param string $pwd Key to encrypt with (can be binary of hex) * @param string $data Content to be encrypted * @param bool $ispwdHex Key passed is in hexadecimal or not * @access public * @return string */ static function encrypt ($pwd, $data, $ispwdHex = 0) { if ($ispwdHex) $pwd = @pack('H*', $pwd); // valid input, please! $key[] = ''; $box[] = ''; $cipher = ''; $pwd_length = strlen($pwd); $data_length = strlen($data); for ($i = 0; $i < 256; $i++) { $key[$i] = ord($pwd[$i % $pwd_length]); $box[$i] = $i; } for ($j = $i = 0; $i < 256; $i++) { $j = ($j + $box[$i] + $key[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } for ($a = $j = $i = 0; $i < $data_length; $i++) { $a = ($a + 1) % 256; $j = ($j + $box[$a]) % 256; $tmp = $box[$a]; $box[$a] = $box[$j]; $box[$j] = $tmp; $k = $box[(($box[$a] + $box[$j]) % 256)]; $cipher .= chr(ord($data[$i]) ^ $k); } return $cipher; } /** * Decryption, recall encryption * * @param string $pwd Key to decrypt with (can be binary of hex) * @param string $data Content to be decrypted * @param bool $ispwdHex Key passed is in hexadecimal or not * @access public * @return string */ static function decrypt ($pwd, $data, $ispwdHex = 0) { return self::encrypt($pwd, $data, $ispwdHex); } } |