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Re: [dmarc-ietf] Definition of "value" in RFC8601

Brandon Long <blong@google.com> Mon, 30 March 2020 20:58 UTC

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From: Brandon Long <blong@google.com>
Date: Mon, 30 Mar 2020 13:57:57 -0700
Message-ID: <CABa8R6tTPAtEyPRSGbWKafZVZ4u8v8sN1VpTpMLQCia2_+5zRg@mail.gmail.com>
To: Damian Lukowski <rfc@arcsin.de>
Cc: IETF DMARC WG <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] Definition of "value" in RFC8601
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Hmm, we didn't include this in RFC 8616 either, I could imagine that it
should be punycoded also, though it really depends on whether in 6532 or
5322.

Brandon

On Sat, Mar 28, 2020 at 3:39 AM Damian Lukowski <rfc@arcsin.de> wrote:

> Hello,
>
> RFC8601 section 2.2 defines
>
> > authserv-id = value
> >             ; see below for a description of this element
> > [...]
> > The "value" is as defined in Section 5.1 of [MIME], with
> > "quoted-string" updated as specified in [RFC6532].
> [MIME] (RFC2045) section 5.1
>
> > value := token / quoted-string
> > token := 1*<any (US-ASCII) CHAR except SPACE, CTLs,
> >             or tspecials>
>
> The token is not said to be updated by [RFC6532] as is quoted-string, so
> by my interpretation non-ASCII cannot be used without quotes.
>
> If so, then current implementations of OpenDKIM and OpenDMARC are wrong
> or imcomplete, as they do not check for Non-ASCII AuthservID and produce
> headers like
>
> > Authentication-Results: öde; dkim=none; dkim-atps=neutral
> Is my understanding correct?
>
> Regards
>  Damian
>
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