Re: [Unbearable] Ben Campbell's Yes on draft-ietf-tokbind-negotiation-12: (with COMMENT)

Eric Rescorla <ekr@rtfm.com> Wed, 09 May 2018 21:05 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 9 May 2018 14:05:00 -0700
Message-ID: <CABcZeBM+u7xCCTrhnua8+SRZM6ruEBMgiew42FdiiN-=8tZryQ@mail.gmail.com>
To: Ben Campbell <ben@nostrum.com>
Cc: The IESG <iesg@ietf.org>, John Bradley <ve7jtb@ve7jtb.com>, draft-ietf-tokbind-negotiation@ietf.org, IETF Tokbind WG <unbearable@ietf.org>, tokbind-chairs@ietf.org
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Subject: Re: [Unbearable] Ben Campbell's Yes on draft-ietf-tokbind-negotiation-12: (with COMMENT)
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On Wed, May 9, 2018 at 1:05 PM, Ben Campbell <ben@nostrum.com> wrote:

> Ben Campbell has entered the following ballot position for
> draft-ietf-tokbind-negotiation-12: Yes
>
> When responding, please keep the subject line intact and reply to all
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> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-tokbind-negotiation/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Thanks for this document. I am balloting "yes", but have a few comments:
>
> - I support Alexey's DISCUSS. Additionally, do I understand the version
> negotiation to require the client to support all previous version from the
> one
> it initially advertises? If so, how would you deprecate a version at some
> time
> in the future?
>

You can't do it in the CH. The assumption is that the server will pick the
highest
common version in the SH and if you don't support that, you abort.

-Ekr