Re: [Cfrg] KCipher-2

Hello, 

Appendix C.2 in the document "draft-kiyomoto-kcipher2-08" includes a test vector that lists internal state bits. I hope that that would be appropriate information for implementers.

Best regards, 

Shinsaku

On Fri, 25 Jan 2013 15:55:06 +0000
"Scott Fluhrer (sfluhrer)" <sfluhrer@cisco.com> wrote:

> 
> 
> > -----Original Message-----
> > From: cfrg-bounces@irtf.org [mailto:cfrg-bounces@irtf.org] On Behalf Of
> > Joachim Strömbergson
> > Sent: Friday, January 25, 2013 4:09 AM
> > To: cfrg@irtf.org
> > Subject: Re: [Cfrg] KCipher-2
> > 
> > Aloha!
> > 
> > On 2012-12-07 20:00 , Jon Callas wrote:
> > > Yes, put the table in. It's a long-standing frustration of mine that
> > > crypto documents seem to think that part of the fun is to guess about
> > > implementation until you finally get it right. A sort of
> > > gameification, I suppose, that makes a spec a choose-your-own
> > > adventure. This gets boring, fast. The vast majority of us
> > > implementors want to get it done, fast and accurate. Anything that
> > > helps that is a Good Thing.
> > 
> > (Slight OT)
> > 
> > +100
> > 
> > At the absolute minimum add test vectors. Adding a clean, well
> > documented reference implementation that uses std types (stdint.h) is
> > makes it even better and if you also include internal states during
> > processing of at least one test vector you make the implementers life
> > _much_ easier.
> 
> For extra bonus points, include a test vector that lists the internal cipher state at various points (for example, after each round).  This makes life a lot easier on an implementer if the ever need to diagnose why their implementation doesn't work.
> 
> > 
> > The siphash specification includes good test vectors and a great walk
> > through that made the implementation pretty comfortable. The C reference
> > code is, shall we say, terse. Also it really helps if one defines operation
> > symbols before using them in the spec...
> > 
> > https://131002.net/siphash/
> > 
> > --
> > Med vänlig hälsning, Yours
> > 
> > Joachim Strömbergson - Alltid i harmonisk svängning.
> > ===================================================================
> > =====
> > 
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