参考discuz的passpor写的php加密解密处理类
-
-
/*---------------------------------------
- = 版权协议：
- = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)
- =------------------------------------------------------------
- = 文件名称：cls.sys_crypt.php
- = 摘 要：php加密解密处理类
- = 版 本：1.0
- = 参 考：Discuz论坛的passport相关函数
- =------------------------------------------------------------
- = Script Written By PHPWMS项目组
- = 最后更新：xinge
- = 最后日期：2007-12-09
- ---------------------------------------=*/
-
- class SysCrypt {
- private $crypt_key;
-
- // 构造函数
- public function __construct($crypt_key) {
- $this -> crypt_key = $crypt_key;
- }
-
- public function php_encrypt($txt) {
- srand((double)microtime() * 1000000);
- $encrypt_key = md5(rand(0,32000));
- $ctr = 0;
- $tmp = '';
- for($i = 0;$i $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
- $tmp .= $encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++]);
- }
- return base64_encode(self::__key($tmp,$this -> crypt_key));
- }
-
- public function php_decrypt($txt) {
- $txt = self::__key(base64_decode($txt),$this -> crypt_key);
- $tmp = '';
- for($i = 0;$i $md5 = $txt[$i];
- $tmp .= $txt[++$i] ^ $md5;
- }
- return $tmp;
- }
-
- private function __key($txt,$encrypt_key) {
- $encrypt_key = md5($encrypt_key);
- $ctr = 0;
- $tmp = '';
- for($i = 0; $i $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
- $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
- }
- return $tmp;
- }
-
- public function __destruct() {
- $this -> crypt_key = null;
- }
- }
-
- #--调用示例
- $sc = new SysCrypt('phpwms');
- $text = '110';
- print($sc -> php_encrypt($text));
- print('
');
- print($sc -> php_decrypt($sc -> php_encrypt($text)));
- ?>
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