Re: [Emu] [lamps] EAP/EMU recommendations for client cert validation logic

Stephen Farrell <stephen.farrell@cs.tcd.ie> Sat, 18 January 2020 15:28 UTC

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To: Ryan Sleevi <ryan-ietf@sleevi.com>
Cc: Alan DeKok <aland@deployingradius.com>, Benjamin Kaduk <kaduk@mit.edu>, EMU WG <emu@ietf.org>, Joseph Salowey <joe@salowey.net>, Michael Richardson <mcr+ietf@sandelman.ca>, "Owen Friel (ofriel)" <ofriel@cisco.com>, "spasm@ietf.org" <spasm@ietf.org>
References: <B2989B0E-8B6B-4B7A-B871-AF520310B3FC@deployingradius.com> <00453E78-D991-4B4D-A138-5788FACC47C2@deployingradius.com> <CAErg=HFYQpfqTE9==TzGo795ZiuNBGVMqWuXS6GJ2DV0nGxPzA@mail.gmail.com> <316CC74D-667B-4A1E-AD48-A702DF705423@deployingradius.com> <6191.1578513600@localhost> <CB67C090-4D6A-4586-AD7C-99A29EF5D92D@deployingradius.com> <CAOgPGoDADPY125Bf7mbPCpEVkwVF=YmbG9wAN0S-WyCWg27BCw@mail.gmail.com> <20200116040715.GC80030@kduck.mit.edu> <CAErg=HHwLOw9sL2=nGca5MuuyiV2Zghrp6prR7SqLJAvfCLmjA@mail.gmail.com> <B3A03277-C176-4E63-ADB3-70133E2ABA46@deployingradius.com> <MN2PR11MB3901D1B17802F2DACCC8966CDB300@MN2PR11MB3901.namprd11.prod.outlook.com> <CAErg=HE0XDbhuibtky5VhvZYUnQxDitLSEuf4uzXnuByNQN+4Q@mail.gmail.com> <55CE7F32-B5DE-44F5-AE06-72BE12FA05FF@deployingradius.com> <CAErg=HH8LjqMR37Ek1uK12uCDj4N89Ot=Fm_PLOBdeXsv3sdpw@mail.gmail.com> <3f964440-37d4-a08e-3d86-10ea712e99ca@cs.tcd.ie> <CAErg=HH15iqUnJxQPCSadx04r33DvLYwiaC7C2Cv4cX0tKvpyQ@mail.gmail.com>
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Sat, 18 Jan 2020 15:28:43 +0000
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Subject: Re: [Emu] [lamps] EAP/EMU recommendations for client cert validation logic
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Hiya,

On 18/01/2020 15:14, Ryan Sleevi wrote:
> The only way you sort through those is to make sure the only two parties
> are you and the CA - aka defining a root store.

I disagree. PKI inherently has 3 parties involved. Ignoring
any one or two of them is what I think leads to the kind of
silliness that results in us even mentioning possible mass
revocation because of an ill-defined OID. Heartbleed might
just about have justified that, this very much does not.

I do fully agree with you that the idea that end entities
ever read a CP/CPS is about as realistic as "click yes to
accept cookies" or other similar things being meaningful.
Sadly, such legal nonsense does seem to be required but we
ought not let it drive what we do - in this case, IMO the
blindingly obviously correct thing to do is to recognise
the reality of the use of the OID and regularise that.

But if that's not going to happen, then the 2nd best (and
99.999% just as good) thing to do is to happily continue to
ignore the supposed problem.

Cheers,
S.