(make-aes-key integer) -> aes-key
(make-aes-key integer string) -> aes-key
(make-aes-key integer random) -> aes-key
Creates an AES encryption key of integer bytes in length. If the optional string or random is given, it is used as an initialation vector.
Example:
>> (make-aes-key 256) :: [aes-key]