from preamble:
"Change Set: AES Date: 24 November 2006 Author: Timothy J. Miller
Refactored as a single class and did away with the factory method. Don't know what I was thinking there. New Error subclass to raise when attempting to do something valid in Rijndael that AES doesn't allow. Created Cryptography-Exceptions category as something tells me that this won't be the last exception."!
cryptography@lists.squeakfoundation.org