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Re: [TLS] Proposed change in TLS-Flags

Yoav Nir <ynir.ietf@gmail.com> Wed, 01 July 2020 18:01 UTC

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From: Yoav Nir <ynir.ietf@gmail.com>
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Date: Wed, 01 Jul 2020 21:01:32 +0300
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To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
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Subject: Re: [TLS] Proposed change in TLS-Flags
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I don’t know. There already is an extension for this.

We haven’t discussed whether we want to “cover” semantics that already exist in other extensions.

If that’s something the group wants, we can add it, but it’s not generally a good thing for a protocol to have two ways of expressing the same thing.

Yoav

> On 1 Jul 2020, at 19:00, Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
> 
> One question: Wouldn’t you want to register a flag for "Post-Handshake Client Authentication" in this document?
> 
> Ciao
> Hannes
> 
> 
> From: TLS <tls-bounces@ietf.org> On Behalf Of Hannes Tschofenig
> Sent: Wednesday, July 1, 2020 5:55 PM
> To: Yoav Nir <ynir.ietf@gmail.com>; <tls@ietf.org> <tls@ietf.org>
> Subject: Re: [TLS] Proposed change in TLS-Flags
> 
> Yoav,
> 
> I looked at the draft and the PR. I am fine with the proposed changes.
> This is a short and useful draft.
> 
> Ciao
> Hannes
> 
> From: TLS <tls-bounces@ietf.org> On Behalf Of Yoav Nir
> Sent: Monday, June 29, 2020 11:34 PM
> To: <tls@ietf.org> <tls@ietf.org>
> Subject: [TLS] Proposed change in TLS-Flags
> 
> Hi
> 
> I’ve just submitted the following PR:
> 
> https://github.com/tlswg/tls-flags/pull/4
> 
> Three changes:
> • It is no longer allowed to send an empty flags extension.  If you don’t support any flags, don’t send the extension.
> • The server is no longer allowed to respond with flag types that the client didn’t indicate support for first.
> • I’ve split the extension description section into a format section and a rules section
> 
> Please comment. Barring any objections, I’ll merge the PR just before the submission deadline.
> 
> Yoav
> 
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