Re: [Ace] draft-ietf-ace-coap-est-00

Michael Richardson <mcr@sandelman.ca> Thu, 15 March 2018 09:42 UTC

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From: Michael Richardson <mcr@sandelman.ca>
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Comments: In-reply-to Benjamin Kaduk <kaduk@mit.edu> message dated "Tue, 13 Mar 2018 20:52:34 -0500."
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Date: Thu, 15 Mar 2018 08:03:06 +0000
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Subject: Re: [Ace] draft-ietf-ace-coap-est-00
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Benjamin Kaduk <kaduk@mit.edu> wrote:
    >> Jim Schaad <ietf@augustcellars.com> wrote:
    >> > In section 2 - There will be a problem in that the port format extension is
    >> > being eliminated in TLS 1.3 - We may want to divide this into a 1.2 and 1.3
    >> > section for clarity.
    >>
    >> I don't understand what you are referring to.
    >>
    >> What is the "port format extension" you are referring to, and where in
    >> section 2 do you think we are depending upon it?

    > [...] DTLS
    > implementations MUST use the Supported Elliptic Curves and Supported
    > Point Formats Extensions [RFC4492]; the uncompressed point format
    > MUST be supported; [RFC6090] can be used as an implementation method.

Ah, so s/port/point/

    > The uncompressed point format only exists in (D)TLS 1.2 and lower.
    > (TLS 1.3 does not separately negotiate point format, rather, the
    > point format is determined by the group/curve to be used.)

I think we were just being overly specific, I'm not sure why.

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