AES -192使用PHP进行加密/解密？

Question

I have done AES128 encryption/decryption in php using the AES128 script available at http://www.phpclasses.org/package/3650-PHP-A-pure-PHP-AES-128-encryption-implementation.html or http://www.phpclasses.org/browse/file/17721.html Now I have a key of 24 characters and data(already stored in database) is encrypted using the 24 character key. So I am supposed to decrypt this data.

I think it is AES-192 (correct me if am wrong) coz its 24 character key. Is it possible to modify the AES128.php code available at phpclasses(link is above) so that it can be used to decrypt AES192 encrypted data. Please help..

Answer 1

I wouldn't try modifying to code yourself if you don't know much about cryptography. Chances of getting something wrong are pretty high.

If you're free to change the AES implementation you use, why not use the PHP supplied mcypt module ( http://php.net/manual/en/ref.mcrypt.php )? It supports AES-128, -192, -256-bit (under the name MCRYPT_RIJNDAEL_xxx) and much, much more. Plus, as a free bonus, you can find tons of code examples for it.

Here is an example: http://www.php.net/manual/en/function.mcrypt-encrypt.php#78531 .

Answer 2

Use mycrypt and RIJNDAEL-192 cipher, it is the same than AES.

http://fr2.php.net/manual/fr/mcrypt.ciphers.php