Re: [Emu] POST WGLC Comments draft-ietf-emu-eap-tls13

Joseph Salowey <joe@salowey.net> Thu, 31 October 2019 04:45 UTC

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In-Reply-To: <20826A11-1881-40F9-8C54-82BB90820851@deployingradius.com>
From: Joseph Salowey <joe@salowey.net>
Date: Wed, 30 Oct 2019 21:44:48 -0700
Message-ID: <CAOgPGoCAb6hbWfPLLGDXAv80Grxn1vTTxOzLctx4E+R0ZhBvGg@mail.gmail.com>
To: Alan DeKok <aland@deployingradius.com>
Cc: Eliot Lear <lear@cisco.com>, "draft-ietf-emu-eap-tls13@ietf.org" <draft-ietf-emu-eap-tls13@ietf.org>, John Mattsson <john.mattsson=40ericsson.com@dmarc.ietf.org>, Michael Richardson <mcr@sandelman.ca>, EMU WG <emu@ietf.org>
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Subject: Re: [Emu] POST WGLC Comments draft-ietf-emu-eap-tls13
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On Wed, Oct 30, 2019 at 4:12 AM Alan DeKok <aland@deployingradius.com>
wrote:

> On Oct 30, 2019, at 5:02 AM, Eliot Lear <lear@cisco.com> wrote:
> > A fair argument, if it can be made, and I am not convinced it has been
> fully expressed, is the idea that there is no context by which one can
> separate fast restart and initial authentication.  This is Alan’s concern.
> I’m not saying it’s without merit, but what I cannot yet see is whether it
> is an implementation or a protocol matter.
>
>   I believe it's a protocol matter.  In TLS 1.3, PSK handshakes are the
> same as resumption handshakes.
>
>   It's not clear to me how this issue was addressed when using TLS 1.3
> with HTTPS.  But I do believe it's an issue there, too.
>
>
[Joe] Can you elaborate on what the issue is?  I think most TLS deployments
operate in either a certificate based mode or a PSK mode, but not both at
the same time.


>   As an additional note, I believe it's also important that
> draft-dekok-emu-tls-eap-types be published at the same time as the EAP-TLS
> document.  The only unknown there is FAST and TEAP.  I'm happy to remove
> them from the document.
>
>   But at this point it's not even a WG document.  There's not even
> consensus that the document necessary, which surprises me rather a lot.
> Because password-based EAP methods are *much* more wide-spread than EAP-TLS.
>
>   If the IETF publishes EAP-TLS without simultaneously rev'ing TTLS and
> PEAP, it will not only look bad, it will *be* bad.  And the industry press
> will (rightfully) lambast the standards process.
>
>
[Joe] We need people to contribute to the document.  If we are going to
publish a document through the working group it needs to at least to
include TEAP.   I know there are folks on this list who are implementing.
They need to step up and help with this document and the TEAP errata.


>   Alan DeKok.
>
>