Template:String:AES256CBCencrypt syntax
%outString = string:AES256CBCencrypt( key, initVector) Throws UnsupportedCrypto, InvalidCryptoKey, InvalidCryptoData, InvalidCryptoInitVector
%outString = string:AES256CBCencrypt( key, initVector) Throws UnsupportedCrypto, InvalidCryptoKey, InvalidCryptoData, InvalidCryptoInitVector