PHP实现的加密解密处理类
这篇文章主要介绍了PHP实现的加密解密处理类,结合实例形式分析了php加密解密类的定义与使用技巧,需要的朋友可以参考下。
本文实例讲述了PHP实现的加密解密处理类,分享给大家供大家参考,具体如下:
- <?php
- /*===========================================================
- = 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
- =------------------------------------------------------------
- = 最后更新日期: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;$i<strlen($txt);$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;$i < strlen($txt); $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; $i < strlen($txt); $i++) {
- $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
- $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
- }
- return $tmp;
- }
- public function __destruct() {
- $this -> crypt_key = null;
- }
- }
- //执行代码
- $sc = new SysCrypt('phpwms');
- $text = 'abc10000008910000000990099hh'; //需要加密的数据
- print($sc -> php_encrypt($text)); //加密
- print('<br>');
- print($sc -> php_decrypt($sc -> php_encrypt($text))); //解密
- ?>