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Re: [COSE] Stephen Farrell's Discuss on draft-ietf-cose-msg-20: (with DISCUSS and COMMENT)

Jim Schaad <ietf@augustcellars.com> Thu, 03 November 2016 04:58 UTC

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From: Jim Schaad <ietf@augustcellars.com>
To: 'Göran Selander' <goran.selander@ericsson.com>
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Date: Wed, 02 Nov 2016 21:58:38 -0700
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Cc: 'Justin Richer' <jricher@mit.edu>, cose-chairs@ietf.org, 'The IESG' <iesg@ietf.org>, draft-ietf-cose-msg@ietf.org, 'Stephen Farrell' <stephen.farrell@cs.tcd.ie>, cose@ietf.org
Subject: Re: [COSE] Stephen Farrell's Discuss on draft-ietf-cose-msg-20: (with DISCUSS and COMMENT)
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> -----Original Message-----
> From: Göran Selander [mailto:goran.selander@ericsson.com]
> Sent: Wednesday, November 02, 2016 12:55 PM
> To: Jim Schaad <ietf@augustcellars.com>
> Cc: Stephen Farrell <stephen.farrell@cs.tcd.ie>; Justin Richer <jricher@mit.edu>;
> cose-chairs@ietf.org; draft-ietf-cose-msg@ietf.org; The IESG <iesg@ietf.org>;
> cose@ietf.org
> Subject: Re: [COSE] Stephen Farrell's Discuss on draft-ietf-cose-msg-20: (with
> DISCUSS and COMMENT)
> 
> 
> 
> > On 2 nov. 2016, at 18:11, Jim Schaad <ietf@augustcellars.com> wrote:
> >
> >
> >
> >> -----Original Message-----
> >> From: Stephen Farrell [mailto:stephen.farrell@cs.tcd.ie]
> >> Sent: Tuesday, November 01, 2016 2:16 PM
> >> To: Jim Schaad <ietf@augustcellars.com>; 'Justin Richer' <jricher@mit.edu>
> >> Cc: cose-chairs@ietf.org; cose@ietf.org; 'The IESG' <iesg@ietf.org>; draft-
> ietf-
> >> cose-msg@ietf.org
> >> Subject: Re: Stephen Farrell's Discuss on draft-ietf-cose-msg-20: (with
> DISCUSS
> >> and COMMENT)
> >>
> >>
> >> Hiya,
> >>
> >>> On 01/11/16 19:17, Jim Schaad wrote:
> >>> Another thread dealing with this issue includes
> >>> https://www.ietf.org/mail-archive/web/cose/current/msg00981.html  -
> >>> basically the subject is 'make "alg" field optional'
> >>>
> >>> Usual suspects (Göran, Ludwig, Francesca) on one side, me and a
> >>> couple of others on the other side.  Interestingly the antis included
> >>> Mike who argued for this in the JOSE.
> >>
> >> Heh. To be honest, I'm not sure what's best here. Normally if
> >> it were just my design tastes against the WGs, I'd happily
> >> fold. But in this case we have an appendix that says how to
> >> not do what's a MUST in the body of the spec. And I suspect
> >> that this could damage interop depending on whether or not
> >> libraries follow the MUST or not.
> >>
> >> Do we think there's a way to square this circle and somehow
> >> get rid of the appendix to get to a result folks can all use?
> >
> > I wish I knew.  The fact that the CORE draft is not even complying with how
> the appendix is saying to do things almost leads me to think that we should just
> kill that section of the appendix and re-evaluate things.

I may have misinterpreted what Göran said and this may not be the case.

Jim

> 
> I'd like to understand what is the problem with how it is specified in the  CORE
> draft, if it is a problem. If it isn't, then either stop mandating alg + remove app A,
> or change Appendix A so that this case isn't discouraged.
> 
> Göran

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