cookie加密

<?php
class Cookie
{
/**
* 解密已经加密了的cookie
*
* @param string $encryptedText
* @return string
*/
private static function _decrypt($encryptedText)
{
$key = Config::get(‘secret_key’);
$cryptText = base64_decode($encryptedText);
$ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
$decryptText = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $cryptText, MCRYPT_MODE_ECB, $iv);
return trim($decryptText);
}

/**
* 加密cookie
*
* @param string $plainText
* @return string
*/
private static function _encrypt($plainText)
{
$key = Config::get(‘secret_key’);
$ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
$encryptText = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $plainText, MCRYPT_MODE_ECB, $iv);
return trim(base64_encode($encryptText));
}

/**
* 删除cookie
*
* @param array $args
* @return boolean
*/
public static function del($args)
{
$name = $args[‘name’];
$domain = isset($args[‘domain’]) ? $args[‘domain’] : null;
return isset($_COOKIE[$name]) ? setcookie($name, ”, time() – 86400, ‘/’, $domain) : true;
}

/**
* 得到指定cookie的值
*
* @param string $name
*/
public static function get($name)
{
return isset($_COOKIE[$name]) ? self::_decrypt($_COOKIE[$name]) : null;
}

/**
* 设置cookie
*
* @param array $args
* @return boolean
*/
public static function set($args)
{
$name = $args[‘name’];
$value= self::_encrypt($args[‘value’]);
$expire = isset($args[‘expire’]) ? $args[‘expire’] : null;
$path = isset($args[‘path’]) ? $args[‘path’] : ‘/’;
$domain = isset($args[‘domain’]) ? $args[‘domain’] : null;
$secure = isset($args[‘secure’]) ? $args[‘secure’] : 0;
return setcookie($name, $value, $expire, $path, $domain, $secure);
}
}