php加密解密处理类--参考：Discuz论坛的passpor

`02`	`/*===========================================================`

03 = 版权协议：

`04`	`= GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)`

`05`	`=------------------------------------------------------------`

`06`	`= 文件名称：cls.sys_crypt.php`

`07`	`= 摘要：php加密解密处理类`

`08`	`= 版本：1.0`

`09`	`= 参考：Discuz论坛的passport相关函数`

`10`	`=------------------------------------------------------------`

`11`	`= Script Written By PHPWMS项目组`

`12`	`= 最后更新：xinge`

`13`	`= 最后日期：2007-12-09`

`14`	`============================================================*/`

15

`16`	`class` `SysCrypt {`

17

`18`	`private` `$crypt_key;`

19

20 // 构造函数

`21`	`public` `function` `__construct($crypt_key) {`

`22`	`$this` `-> crypt_key =` `$crypt_key;`

23 }

24

`25`	`public` `function` `php_encrypt($txt) {`

`26`	`srand((double)microtime() * 1000000);`

`27`	`$encrypt_key` `= md5(rand(0,32000));`

`28`	`$ctr` `= 0;`

`29`	`$tmp` `=` `'';`

`30`	`for($i` `= 0;$i<strlen($txt);$i++) {`

`31`	`$ctr` `=` `$ctr` `==` `strlen($encrypt_key) ? 0 :` `$ctr;`

`32`	`$tmp` `.=` `$encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++]);`

33 }

`34`	`return` `base64_encode(self::__key($tmp,$this` `-> crypt_key));`

35 }

36

`37`	`public` `function` `php_decrypt($txt) {`

`38`	`$txt` `= self::__key(base64_decode($txt),$this` `-> crypt_key);`

`39`	`$tmp` `=` `'';`

`40`	`for($i` `= 0;$i` `<` `strlen($txt);` `$i++) {`

`41`	`$md5` `=` `$txt[$i];`

`42`	`$tmp` `.=` `$txt[++$i] ^` `$md5;`

43 }

`44`	`return` `$tmp;`

45 }

46

`47`	`private` `function` `__key($txt,$encrypt_key) {`

`48`	`$encrypt_key` `= md5($encrypt_key);`

`49`	`$ctr` `= 0;`

`50`	`$tmp` `=` `'';`

`51`	`for($i` `= 0;` `$i` `<` `strlen($txt);` `$i++) {`

`52`	`$ctr` `=` `$ctr` `==` `strlen($encrypt_key) ? 0 :` `$ctr;`

`53`	`$tmp` `.=` `$txt[$i] ^` `$encrypt_key[$ctr++];`

54 }

`55`	`return` `$tmp;`

56 }

57

`58`	`public` `function` `__destruct() {`

`59`	`$this` `-> crypt_key = null;`

60 }

61 }

62

63

`64`	`$sc` `=` `new` `SysCrypt('phpwms');`

`65`	`$text` `=` `'110';`

`66`	`print($sc` `-> php_encrypt($text));`

`67`	`print(' ');`

`68`	`print($sc` `-> php_decrypt($sc` `-> php_encrypt($text)));`

69 ?>

http://www.bkjia.com/PHPjc/371817.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/371817.htmlTechArticle?php 02 /*=========================================================== 03 = 版权协议： 04 = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991) 05 =----------------------...

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