Re: [TLS] 0-RTT and Anti-Replay

Ilari Liusvaara <ilari.liusvaara@elisanet.fi> Mon, 23 March 2015 16:52 UTC

Return-Path: <ilari.liusvaara@elisanet.fi>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DEA431ACD21 for <tls@ietfa.amsl.com>; Mon, 23 Mar 2015 09:52:06 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.901
X-Spam-Level:
X-Spam-Status: No, score=-1.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham
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 VGu3dK3M_9xn for <tls@ietfa.amsl.com>; Mon, 23 Mar 2015 09:52:04 -0700 (PDT)
Received: from emh06.mail.saunalahti.fi (emh06.mail.saunalahti.fi [62.142.5.116]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 119701A8A17 for <tls@ietf.org>; Mon, 23 Mar 2015 09:52:04 -0700 (PDT)
Received: from LK-Perkele-VII (a88-112-44-140.elisa-laajakaista.fi [88.112.44.140]) by emh06.mail.saunalahti.fi (Postfix) with ESMTP id E8AFB699DA for <tls@ietf.org>; Mon, 23 Mar 2015 18:52:01 +0200 (EET)
Date: Mon, 23 Mar 2015 18:52:01 +0200
From: Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
To: tls@ietf.org
Message-ID: <20150323165201.GA15202@LK-Perkele-VII>
References: <CABcZeBP9LaGhDVETsJeecnAtSPUj=Kv37rb_2esDi3YaGk9b4w@mail.gmail.com> <550F6582.9040602@brainhub.org> <CABcZeBNn92Zu7Hfu5z8qD=AZDn=jUkZ3phk18G7S1z7XJNQ9sQ@mail.gmail.com> <CABkgnnWXtpuSKH-eEou9O7qncUSeuiv=4kw_GE6Um8VW3dcohQ@mail.gmail.com> <20150323083308.GL21267@localhost> <20150323144052.GF9387@mournblade.imrryr.org> <55102E3A.70300@zinks.de> <20150323152831.GG9387@mournblade.imrryr.org> <55103A6E.4060409@zinks.de> <20150323162200.GI9387@mournblade.imrryr.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <20150323162200.GI9387@mournblade.imrryr.org>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
Archived-At: <http://mailarchive.ietf.org/arch/msg/tls/jd3UlxvOAm7yV-ChN2icKJod8vw>
Subject: Re: [TLS] 0-RTT and Anti-Replay
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tls/>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 23 Mar 2015 16:52:07 -0000

On Mon, Mar 23, 2015 at 04:22:00PM +0000, Viktor Dukhovni wrote:
> 
>     * If clients make 0-RTT requests to a stack that does not
>     support these, all connection abort when the stack requests
>     non-expedited data, while expedited data is pending.

I regard that as very bad idea. The server should reject the
0-RTT data, not abort the connection, because the former can
sanely be handled by the client, the latter can't.


-Ilari