01 | <?php |
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($text)); |
67 | print('<br>'); |
68 | print($sc -> php_decrypt($sc -> php_encrypt($text))); |
69 | ?> |