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Re: [TLS] More flexible signature_algorithm selection for Delegated Credentials

Nick Sullivan <nick@cloudflare.com> Thu, 21 November 2019 07:37 UTC

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From: Nick Sullivan <nick@cloudflare.com>
Date: Thu, 21 Nov 2019 15:36:52 +0800
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To: Martin Thomson <mt@lowentropy.net>
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Subject: Re: [TLS] More flexible signature_algorithm selection for Delegated Credentials
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On Thu, Nov 21, 2019 at 1:43 PM Martin Thomson <mt@lowentropy.net> wrote:

> On Thu, Nov 21, 2019, at 11:54, Nick Sullivan wrote:
> > At IETF 106, we discussed adding the ability to advertise specific
> > signature algorithms for use in DCs without requiring clients to have
> > to support these signature algorithms in leaf certificates.
>
> Is the intent with supporting an empty extension to support backward
> compatibility?  I think that deployed implementations can probably just
> change to use the list so that we don't have to include this additional
> flexibility.  I'd prefer to always have a list.
>

Even simpler. Once we have a pre-allocated codepoint, the can be released
without conflict with deployed code.

>
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