Re: libmcrypt usage

Gary wrote:

Nathan Rixham wrote:

Gary wrote:

Can anyone tell me what the equivalent to the following command line usage of openssl is, in php using the mcrypt_* functions, please: ,---- | openssl enc -e -aes-256-cbc -k <some key> ... `---- TIA. I tried ,----

|         $iv = mcrypt_create_iv(mcrypt_get_block_size(MCRYPT_RIJNDAEL_256,
|                                                      MCRYPT_MODE_CBC),
|                                MCRYPT_DEV_RANDOM);
|         $encryptedData = mcrypt_cbc(MCRYPT_RIJNDAEL_256
|                                     ,$passphrase
|                                     ,$data
|                                     ,MCRYPT_ENCRYPT
|                                     ,$iv);

`----

use MCRYPT_RIJNDAEL_128

Err.. why, if you don't mind me asking?

because MCRYPT_RIJNDAEL_128 is the implementation of AES and if you use a 16 bit key you get AES 128, a 32 bit key and you get AES 256 :) after a quick google for "php aes 256", I'd point you to this: http://www.chilkatsoft.com/p/php_aes.asp which explains all