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Re: [Acme] kinds of proof

Peter Bowen <pzbowen@gmail.com> Tue, 02 December 2014 01:12 UTC

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References: <CAL02cgTgpjQffow2XuaNuT7BtqYVttXdVUgyqBFbsAbN4g0VzQ@mail.gmail.com> <DEC7A8A8-563D-41B3-94AC-71DC7219D3F8@cisco.com> <m27fyg4yzg.wl%randy@psg.com> <547754C0.9050306@cs.tcd.ie> <20141127211348.GE25114@mournblade.imrryr.org> <54784C61.2080508@cs.tcd.ie> <20141128170917.GC285@mournblade.imrryr.org> <88B49E1D-1601-4B86-8D93-14CF71501DFC@vpnc.org> <20141128213724.GG285@mournblade.imrryr.org> <7261AA75-5912-4514-A393-94F602C941C2@vpnc.org> <20141129170537.GK285@mournblade.imrryr.org> <m2tx1ehq63.wl%randy@psg.com>
Date: Mon, 01 Dec 2014 17:12:34 -0800
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From: Peter Bowen <pzbowen@gmail.com>
To: Randy Bush <randy@psg.com>
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Cc: acme@ietf.org, Viktor Dukhovni <ietf-dane@dukhovni.org>
Subject: Re: [Acme] kinds of proof
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On Mon, Dec 1, 2014 at 4:05 PM, Randy Bush <randy@psg.com> wrote:
>>> And it is clear to me that they should be, if we want to see more encryption
>>> of traffic. I have no problem with some CAs saying "we'll issue you a cert
>>> only if you control port X", but I absolutely want that to be a policy of
>>> the CA, not of the enrollment protocol.
>>
>> Paul, do you have any examples of CAs that accept any port, or are
>> you in part making that up?  Comodo for example, requires control
>> of port 80:
>
> or dns

Yes, several CAs allow DNS based validation of control.
https://gist.github.com/pzb/3b57ddac91ccf0e4c814 lists several of the
schemes I've seen used.  There is clearly no standard or even
quasi-standard for DNS based validation.

Thanks,
Peter

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