IETF Logo Mail Archive

Re: [Emu] WGLC completed for for draft-ietf-emu-eap-tls13-05

Alan DeKok <aland@deployingradius.com> Sat, 13 July 2019 06:59 UTC

Return-Path: <aland@deployingradius.com>
X-Original-To: emu@ietfa.amsl.com
Delivered-To: emu@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 600001200BA for <emu@ietfa.amsl.com>; Fri, 12 Jul 2019 23:59:12 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tEVSdO2X3uTe for <emu@ietfa.amsl.com>; Fri, 12 Jul 2019 23:59:10 -0700 (PDT)
Received: from mail.networkradius.com (mail.networkradius.com [62.210.147.122]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0BF02120077 for <emu@ietf.org>; Fri, 12 Jul 2019 23:59:10 -0700 (PDT)
Received: from [10.192.3.79] (lstlambert-657-1-56-254.w80-13.abo.wanadoo.fr [80.13.33.254]) by mail.networkradius.com (Postfix) with ESMTPSA id 848111F39; Sat, 13 Jul 2019 06:59:07 +0000 (UTC)
Authentication-Results: NetworkRADIUS; dmarc=none header.from=deployingradius.com
Content-Type: text/plain; charset="us-ascii"
Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\))
From: Alan DeKok <aland@deployingradius.com>
In-Reply-To: <20190712210819.GA26853@w1.fi>
Date: Sat, 13 Jul 2019 08:59:04 +0200
Cc: Joseph Salowey <joe@salowey.net>, EMU WG <emu@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <05B92C31-6CFB-4DFD-BCBD-EE5F3472D7B2@deployingradius.com>
References: <CAOgPGoCB7VOzjo+ckDhNiApa6ozCDr3zfj6pMVG3ZRfV4RP6mQ@mail.gmail.com> <20190712210819.GA26853@w1.fi>
To: Jouni Malinen <j@w1.fi>
X-Mailer: Apple Mail (2.3445.102.3)
Archived-At: <https://mailarchive.ietf.org/arch/msg/emu/RT8ybWQYwa06CdZqTsaUGWaiWvU>
Subject: Re: [Emu] WGLC completed for for draft-ietf-emu-eap-tls13-05
X-BeenThere: emu@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "EAP Methods Update \(EMU\)" <emu.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/emu>, <mailto:emu-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/emu/>
List-Post: <mailto:emu@ietf.org>
List-Help: <mailto:emu-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/emu>, <mailto:emu-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 13 Jul 2019 06:59:12 -0000

On Jul 12, 2019, at 11:08 PM, Jouni Malinen <j@w1.fi> wrote:
> In other words, there does not seem to be any convenient way of
> implementing this with the current version of one of the most commonly
> used TLS libraries. I can make this work by sending out a one-octet
> (0x00) TLSPlaintext as a workaround, but it does not look like I could
> make the implementation comply with the draft without changing the TLS
> library which is close to a complete showstopper for quick deployment.

  I agree.

> It would seem to make sense to me to allow the EAP-TLS 1.3 server to
> send out either an empty plaintext or a one octet plaintext to avoid
> this issue in a straightforward manner.

  We may also want to later perform additional signalling at that phase of the authentication.  As such, it may be good to say:

* a one octet plaintext of 0x00 should be sent
* on reception, any data received should be ignored
  * non-zero octets, or more than one octet MAY indicate future extensions

  Alan DeKok.

v2.23.0 | Report a Bug | By Email