process method
Process a whole block of data
at once, returning the result in a byte array.
Implementation
@override
Uint8List process(Uint8List data) {
// Expand the output block size by an extra byte to handle cases where
// the output is larger than expected.
var out = Uint8List(outputBlockSize + 1);
var len = processBlock(data, 0, data.length, out, 0);
return out.sublist(0, len);
}