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> ...


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);

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:
which explains all

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