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Re: [Acme] AD Review: draft-ietf-acme-ip-04

Martin Thomson <mt@lowentropy.net> Mon, 31 December 2018 05:43 UTC

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From: Martin Thomson <mt@lowentropy.net>
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Date: Mon, 31 Dec 2018 16:43:39 +1100
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Subject: Re: [Acme] AD Review: draft-ietf-acme-ip-04
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On Tue, Dec 25, 2018, at 07:32, Eric Rescorla wrote:
> IMPORTANT
> S 3.
> >      used to refer to fully qualified domain names.  If a ACME server
> >      wishes to request proof that a user controls a IPv4 or IPv6 address
> >      it MUST create an authorization with the identifier type "ip".  The
> >      value field of the identifier MUST contain the textual form of the
> >      address as defined in [RFC1123] Section 2.1 for IPv4 and in [RFC4291]
> >      Section 2.2 for IPv6.
> 
> Are all three variants here valid?

I think that now is a good moment to mention RFC 5952.

I suspect that most implementations use something other than a canonical representation, and probably accept all valid formats, but maybe now is the time to tighten that down.

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