Template:String:AES256CBCdecrypt syntax
%outString = string:AES256CBCdecrypt( key, initVector) Throws UnsupportedCrypto, InvalidCryptoKey, InvalidCryptoData, InvalidCryptoInitVector
%outString = string:AES256CBCdecrypt( key, initVector) Throws UnsupportedCrypto, InvalidCryptoKey, InvalidCryptoData, InvalidCryptoInitVector