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Re: [Spasm] Fwd: New Version Notification for draft-ietf-lamps-eai-addresses-09.txt

Viktor Dukhovni <ietf-dane@dukhovni.org> Sun, 16 April 2017 19:13 UTC

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Date: Sun, 16 Apr 2017 19:13:32 +0000
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
To: SPASM <spasm@ietf.org>
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Subject: Re: [Spasm] Fwd: New Version Notification for draft-ietf-lamps-eai-addresses-09.txt
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On Sat, Apr 15, 2017 at 03:20:23PM -0700, Wei Chuang wrote:
> Hi all,
> 
> An updated draft of "Internationalized Email Addresses in X.509
> certificates" with the latest comments is now posted.  Comments welcome.

This version is I think flawed.

    * It fails to describe how rfc822Name name constraints are to
      be used to restrict SMTPUtf8Name altnames.  (By decoding any
      U-labels in the rfc822Name constraint and then applying to
      the SMTPUtf8Name with byte-for-byte comparison whole domain
      or ancestor domain as appropriate).

    * It incorrectly asserts that SMTPUtf8Name is only for addresses
      with a non-ASCII localpart, while in fact even ASCII localparts
      at UTF-8 domains can be used with SMTPUtf8Name, whenever the
      relevant email address employs a UTF-8 domain name.

    * The new text of section 6 is confusing.  There seems to be
      a misunderstanding here, that may account for both the
      technical errors and the confusing explanatory text.

-- 
	Viktor.

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