I am writing a pretty awesome web application and needed a way of encrypting data. So I wrote a quick class using PHPs mcrypt functions. It uses the super secure Rijndael 256 bit American Encryption Standard (AES).
Here is the class (also available for download on phpclasses.org):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | /** * Crypt :: two-way encryption class using RIJNDAEL 256 AES standard * @uses MCRYPT_RIJNDAEL_256 */ class Crypt { private $key,$iv_size,$iv; /** * constructor * @param $key (string:'DefaultKey') * @return void */ function __construct($key='DefaultKey'){ $this->iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB); $this->iv = mcrypt_create_iv($this->iv_size, MCRYPT_RAND); $this->key = trim($key); } public function encrypt($string){ $string=trim($string); return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->key, $string, MCRYPT_MODE_ECB, $this->iv)); } public function decrypt($string){ return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256,$this->key,base64_decode($string),MCRYPT_MODE_ECB,$this->iv)); } } |
Usage
1 2 3 4 5 6 | <?php include_once 'Crypt.class.php'; $crypt = new Crypt('My_Awes0me-Key!_'); echo $crypt->encrypt('password').'<br/>'; // returns string '5IWS0SagfDMrolmoVIzkAuYbIYkHrRyymG8DdhvNKvc=' echo $crypt->decrypt('5IWS0SagfDMrolmoVIzkAuYbIYkHrRyymG8DdhvNKvc='); // returns string 'password' ?> |