BlockCipher mode tests, fixes, enhancements

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of
> Chris Muller
> Sent: Tuesday, March 07, 2006 11:39 PM
> To: [hidden email]
> 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
> [hidden email]
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography

> 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:
> [hidden email]
> >
>

> On Behalf Of
> > Chris Muller
> > Sent: Tuesday, March 07, 2006 11:39 PM
> > To: [hidden email]
> > 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
> > [hidden email]
> >
>