php实现cookie加密解密

1.加密解密类

 1 class Mcrypt
 2 {
 3     /**
 4      * 解密
 5      * 
 6      * @param string $encryptedText 已加密字符串
 7      * @param string $key  密钥
 8      * @return string
 9      */
10     public static function _decrypt($encryptedText,$key = null)
11     {
12         $key = $key === null ? Config::get('secret_key') : $key;
13         $cryptText = base64_decode($encryptedText);
14         $ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
15         $iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
16         $decryptText = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $cryptText, MCRYPT_MODE_ECB, $iv);
17         return trim($decryptText);
18     }
19  
20     /**
21      * 加密
22      *
23      * @param string $plainText 未加密字符串 
24      * @param string $key        密钥
25      */
26     public static function _encrypt($plainText,$key = null)
27     {
28         $key = $key === null ? Config::get('secret_key') : $key;
29         $ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
30         $iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
31         $encryptText = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $plainText, MCRYPT_MODE_ECB, $iv);
32         return trim(base64_encode($encryptText));
33     }
34 }

2.cookie加密解密类

 1 <?php
 2 class Cookie extends Mcrypt
 3 {
 4     /**
 5      * 删除cookie
 6      * 
 7      * @param array $args
 8      * @return boolean
 9      */
10     public static function del($args)
11     {
12         $name = $args['name'];
13         $domain = isset($args['domain']) ? $args['domain'] : null;
14         return isset($_COOKIE[$name]) ? setcookie($name, '', time() - 86400, '/', $domain) : true;
15     }
16      
17     /**
18      * 得到指定cookie的值
19      * 
20      * @param string $name
21      */
22     public static function get($name)
23     {
24         return isset($_COOKIE[$name]) ? parent::_decrypt($_COOKIE[$name]) : null;
25     }
26      
27     /**
28      * 设置cookie
29      *
30      * @param array $args
31      * @return boolean
32      */
33     public static function set($args)
34     {
35         $name = $args['name'];
36         $value= parent::_encrypt($args['value']);
37         $expire = isset($args['expire']) ? $args['expire'] : null;
38         $path = isset($args['path']) ? $args['path'] : '/';
39         $domain = isset($args['domain']) ? $args['domain'] : null;
40         $secure = isset($args['secure']) ? $args['secure'] : 0;
41         return setcookie($name, $value, $expire, $path, $domain, $secure);
42     }
43 }