[Cryptography Team] BlockCipher mode tests, fixes, enhancements

[Ron Teitelbaum]

Nice work Chris.

Is anyone available to review and verify Chris's work?  (Chris said: CFB
should be verified)

Is anyone else able to help Chris with development?

Chris, I see your notes below; did you add those notes to the class
comments?

Maybe you could coordinate more Schneier changes?  Do you have a list of
what changes you think we should be working on?  

Maybe we could get some team work going?

Ron Teitelbaum

> -----Original Message-----
> From: cryptography-bounces at lists.squeakfoundation.org
> [mailto:cryptography-bounces at lists.squeakfoundation.org] On Behalf Of
> Chris Muller
> Sent: Tuesday, March 07, 2006 11:39 PM
> To: cryptography at lists.squeakfoundation.org
> Subject: [Cryptography Team] BlockCipher mode tests, fixes, enhancements
> 
> Hi, just a note to let you know of some improvements
> I've just committed to our repository.
> 
> Cryptography-Core
> 
> - All four BlockCipher modes are fixed-up and working
> (CFB should be verified).
> - Added ability for BlockCiphers to encrypt and
> decrypt arbitrary-length ByteArray's.
> - When using the non-streaming cipher modes (CBC and
> CFB), proper padding of the ByteArray's should be the
> responsibility of the BlockCipher, not the user
> (developer).  Therefore, #encrypt: applies the "option
> 2" padding scheme specified by Ferguson and Schneier
> in 'Practical Cryptography', p. 68-69.
> - Can also encrypt/decrypt from:to: positions in an
> existing ByteArray.
> - Streaming modes (CTR and OFB) are supported as
> stream ciphers, ByteArray's can be any size and no
> padding to the next-larger block is performed or
> needed.
> 
> Cryptography-Tests
> 
> - Created tests for all BlockCipher modes, by
> generalizing the CTR test.  They all now run the same
> (semi-robust) test.
> - Separate test conditions ensure streaming modes work
> properly.
> - Separate encrypt/decrypt ByteArray tests are
> included for all BlockCipher modes.
> 
> More to come..
> 
>  - Chris
> _______________________________________________
> Cryptography mailing list
> Cryptography at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography