phpで提供される対称暗号化アルゴリズム

KEY はその前に定常量
Mcrypt::encrypt();
Mcrypt::decrypt();

define('ROOT') or exit('Access Denied');

class Mcrypt{

 public static function encrypt($code){
 returnbase64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5(KEY), $ code, MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND)));
 }

 public static function decrypt($code){
 return mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5(KEY), _decode($code)、MCRYPT_MODE_ECB、 mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND));
 }

}

php