[dmarc-ietf] "Missed it by *that* much". . .

Kurt Andersen <kandersen@linkedin.com> Wed, 15 March 2017 23:18 UTC

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From: Kurt Andersen <kandersen@linkedin.com>
Date: Wed, 15 Mar 2017 16:18:11 -0700
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To: dmarc@ietf.org, "Murray S. Kucherawy" <superuser@gmail.com>, seth@valimail.com, Steve Jones <smj@crash.com>, Barry Leiba <barryleiba@computer.org>
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Subject: [dmarc-ietf] "Missed it by *that* much". . .
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I discovered today as I attempted to submit the ARC protocol update that
I've been working on, that the submission system closed about 40 hours
earlier - sigh.

Since I'm headed to Ecuador for a three week vacation with unknown and/or
unlikely Internet access, I have created a git repo and posted the source
(kramdown) and rendered xml, txt, html versions for both the protocol and
usage documents at https://github.com/kurta/arc-docs

Once the submissions system opens and I have internet access, I will get
the official submission completed; but until then, you can see the updates
at:

http://tools.ietf.org/rfcdiff?url1=https://tools.ietf.org/id/draft-ietf-dmarc-arc-protocol-01.txt&url2=https://raw.githubusercontent.com/kurta/arc-docs/master/dmarc-arc-protocol-02.txt

(obviously the date will have to change further)

Here are the key changes I added (based on input from the list and
discussion during the interop in February):

1) Removed the attempts to repair any problems in the ARC chain beyond
simple ordering problems, added cv=invalid
2) Added section 5.4 to discuss phases for transitioning signature
algorithms
3) Updated length of chain? (section 5.1.1.1.1) at least 10, may be up to
50; may mark invalid above that

Also as discussed in the interop, I did not add any additional requirements
in ARC regarding key lengths. I will be submitting an update to the DKIM
spec itself to fork both the key length and signing algorithms into a
registry which can then be managed without requiring further spec updates.

--Kurt