Re: [Spasm] Last Call: <draft-ietf-lamps-eai-addresses-05.txt> (Internationalized Email Addresses in X.509 certificates) to Proposed Standard

Viktor Dukhovni <ietf-dane@dukhovni.org> Wed, 08 March 2017 23:27 UTC

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Subject: Re: [Spasm] Last Call: <draft-ietf-lamps-eai-addresses-05.txt> (Internationalized Email Addresses in X.509 certificates) to Proposed Standard
Date: Wed, 8 Mar 2017 18:27:55 -0500
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> On Mar 8, 2017, at 6:07 PM, Wei Chuang <weihaw@google.com> wrote:
> 
> https://tools.ietf.org/rfcdiff?url2=draft-ietf-lamps-eai-addresses-07.txt

This diff covers a lot more than just name constraints.  One oddity that
stands out is in section 5:

	3.  Ensure local-part is UTF-8.

I don't see how one would "ensure" such a thing, since no encoding
information is available for the localpart, is I would expect that
is always presumptively UTF-8 (if not us-ascii).

More importantly I don't believe that the name constraint issues are
adequately or correctly addressed in this revision.

Instead of prohibiting issuance of EE certs that HAVE SmtpUTF8Name SAN
elements via a cert chain that has a certificate with *just* rfc822Name
constraints, it attempts to require an unnecessary (and I think not
entirely robust) correspondence between the two types constraint, and
needlessly bans EE certs whose chains include just rfc822Name constraints
even in the absence of SmtpUTF8Name SAN elements.

The changes in this revision seem to me to be too extensive, and not
yet finished. :-(

-- 
	Viktor.