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Re: [dtn] Suresh Krishnan's Discuss on draft-ietf-dtn-tcpclv4-18: (with DISCUSS)

Brian Sipos <BSipos@rkf-eng.com> Sat, 29 February 2020 03:55 UTC

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From: Brian Sipos <BSipos@rkf-eng.com>
To: "suresh@kaloom.com" <suresh@kaloom.com>, "iesg@ietf.org" <iesg@ietf.org>
CC: "dtn-chairs@ietf.org" <dtn-chairs@ietf.org>, "draft-ietf-dtn-tcpclv4@ietf.org" <draft-ietf-dtn-tcpclv4@ietf.org>, "dtn@ietf.org" <dtn@ietf.org>, "edward.birrane@jhuapl.edu" <edward.birrane@jhuapl.edu>
Thread-Topic: Suresh Krishnan's Discuss on draft-ietf-dtn-tcpclv4-18: (with DISCUSS)
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Date: Sat, 29 Feb 2020 03:55:30 +0000
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Subject: Re: [dtn] Suresh Krishnan's Discuss on draft-ietf-dtn-tcpclv4-18: (with DISCUSS)
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Suresh,
I'm including responses below with prefix "BS: "

On Tue, 2020-02-18 at 19:35 -0800, Suresh Krishnan via Datatracker wrote:
> Suresh Krishnan has entered the following ballot position for
> draft-ietf-dtn-tcpclv4-18: Discuss
> 
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
> 
> 
> 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-dtn-tcpclv4/
> 
> 
> 
> 
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
> 
> 
> * Section 4.2:
> 
> " TLS 1.2 [RFC5246] or any successors [RFC8446] that are compatible with TLS
> 1.2"
> 
> Hopefully this is easy to resolve but I am not sure what exactly you intended
> to say with this phrase "that are compatible with TLS 1.2". Can you please
> expand and clarify? (I think going through Appendix D of RFC8446 may bring up
> specific things you might be looking for). 
BS: A clarified fragment is "or any successors which are compatible with that
TLS ClientHello". The intent is that the TLS version negotiation uses the same
initial message.
After guidance from the AD, the TCPCLv4 is going to use TLS 1.3 as the baseline
version but the ClientHello use is unchanged. Implementations can use the
ClientHello and security policy to negotiate particular version at runtime.

> A similar construct is also used in
> Section 4.4.1.
BS: I removed the language from this statement and left only "begin a TLS
handshake in accordance with RFC8446."

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