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Re: [TLS] draft-ietf-tls-tls-13-17 posted

Eric Rescorla <ekr@rtfm.com> Fri, 21 October 2016 15:01 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Fri, 21 Oct 2016 08:00:33 -0700
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To: Ilari Liusvaara <ilariliusvaara@welho.com>
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Subject: Re: [TLS] draft-ietf-tls-tls-13-17 posted
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On Fri, Oct 21, 2016 at 7:00 AM, Ilari Liusvaara <ilariliusvaara@welho.com>
wrote:

> On Fri, Oct 21, 2016 at 04:39:59AM -0700, Eric Rescorla wrote:
> > On Fri, Oct 21, 2016 at 2:33 AM, Ilari Liusvaara <
> ilariliusvaara@welho.com>
> > wrote:
> >
> > And since that implementation supports RFC7250 (for the server
> > > certificate), here is my interpretation of it:
> > >
> > > The certificate type is sent in extensions of EE certificate,
> > > via the usual server_certificate_type extension (using the server-side
> > > syntax from RFC7250).
> > >
> >
> > I think this probably should go in Encrypted Extensions.
>
> It is definitely related to the certificate chain,


My argument would be that it doesn't belong in "individual certificates"
because it applies to certificates as a whole. It's not like it would be
legal to have a 7250 cert followed by an X.509 cert, one hopes

-Ekr


-Ekr



and the spec
> says such things should go to the first certificate slot (and indeed
> the table about extensions says it goes to certificate extensions
> block (but not which one).
>


> The client_certificate_type (which I am not using) is listed to go to
> EncryptedExtensions, which definitely looks wrong to me, being another
> extension related to the certificate chain.
>
>
> -Ilari
>

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