IETF Logo Mail Archive

Re: [TLS] WGLC for draft-ietf-tls-ticketrequests

"Christopher Wood" <caw@heapingbits.net> Thu, 14 November 2019 17:02 UTC

Return-Path: <caw@heapingbits.net>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 751DA1208D0 for <tls@ietfa.amsl.com>; Thu, 14 Nov 2019 09:02:27 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.701
X-Spam-Level:
X-Spam-Status: No, score=-2.701 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=heapingbits.net header.b=aJkGMihy; dkim=pass (2048-bit key) header.d=messagingengine.com header.b=iNanT2B5
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 tgroqH6CNzm0 for <tls@ietfa.amsl.com>; Thu, 14 Nov 2019 09:02:25 -0800 (PST)
Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0A88412096D for <tls@ietf.org>; Thu, 14 Nov 2019 09:02:24 -0800 (PST)
Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id DE50B20355; Thu, 14 Nov 2019 12:02:21 -0500 (EST)
Received: from imap4 ([10.202.2.54]) by compute6.internal (MEProxy); Thu, 14 Nov 2019 12:02:21 -0500
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heapingbits.net; h=mime-version:message-id:in-reply-to:references:date:from:to :cc:subject:content-type; s=fm2; bh=Smi2kTT2RDXjYV3H+Q1MaBZNZSrE kMSmR+UzlAhARDQ=; b=aJkGMihyEaEUlp57ly1gDqdn7MJfsXycoU7GhA3CfsOA JNAPFzyC4r1xCo2znL5vU4h/0mEvDVWNzyl9Ew3/HUbLlNbtpEuFYHulRey3u/us 8VrpauvrCdAbGq1WbYKjk1Bb2rDe5BOTOwMx8n0ZuK64nZd60btkd4QPYdL8AL7N 4p5FTPqyczcRJpsuBecOXdhsJ9SSQsYQvV+dQgiQQPwR0m1gC2023QZU9GAwhPeo yjWi5PFARDbBZgW1V/kc7AwzJPdOR7+oWI8UpeCUxFqO6drONJHCe7prbRxAgyHx duzVfuvosbuJ1Q0UwfcwaeQPQAtfCGB4EBzqCCVJHw==
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=Smi2kT T2RDXjYV3H+Q1MaBZNZSrEkMSmR+UzlAhARDQ=; b=iNanT2B5apWT28DrVQ1XKM ner0H9Z3zLAA2eS2KTz3ea76RLs+6VAENb/ORToHqNNYqNLDp24cCcN7LokiviGs VVLw/7bJUZnc0jbbwzK27mU/uayV5RM+9HTz5zJKV/0KGAQ46Pte4KB4qyzCDK57 sTQuOzvJhXXdEvL4roGrjNtm/KTYtzxJbD711+wQo54eBqaepiOGm2PnZS3SnkOx lpuT1RyhVTNEWt3+MuldW1zt3bJ6kycDWM1yEspQWfIWley9dHqdR3PAv8zTKPFv ly93dcEOYwyJoYH4iIDomBt73LOTAqpv9IWomTRzvvVzKr2yzfDraLWJQLvEPO8g ==
X-ME-Sender: <xms:nYjNXQLJCH5AnGlk3ucfdvs7APYq3rF3qAM01D9EJeHxUp4qdOevxw>
X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedufedrudeffedgleehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepofgfggfkjghffffhvffutgesthdtredtreertdenucfhrhhomhepfdevhhhr ihhsthhophhhvghrucghohhougdfuceotggrfieshhgvrghpihhnghgsihhtshdrnhgvth eqnecuffhomhgrihhnpehivghtfhdrohhrghenucfrrghrrghmpehmrghilhhfrhhomhep tggrfieshhgvrghpihhnghgsihhtshdrnhgvthenucevlhhushhtvghrufhiiigvpedt
X-ME-Proxy: <xmx:nYjNXYIBoXnUR10ESxDbgfIo1QG4r_tnDJI9mk3dUWM6INfzy-somg> <xmx:nYjNXRVGfcIBfZnQtUGLF2NXMKhqXgXa-4N6fKBLjr4fa-DoxPhMgw> <xmx:nYjNXc_nlspOhI9G44CXdnKfTwGEGHkm0g9ZatsP_As1vSuOJYdCGw> <xmx:nYjNXSC3ialeCRCyTLpphmXfgyMOEunY0g84vnbfw_-PwwrqfvtS1Q>
Received: by mailuser.nyi.internal (Postfix, from userid 501) id 27DB53C00A2; Thu, 14 Nov 2019 12:02:21 -0500 (EST)
X-Mailer: MessagingEngine.com Webmail Interface
User-Agent: Cyrus-JMAP/3.1.7-562-gfd0633a-fmstable-20191114v1
Mime-Version: 1.0
Message-Id: <a21eff42-5f27-45b9-bb15-cb10d07e7b0c@www.fastmail.com>
In-Reply-To: <CADZyTknpHkugotJxKUmSXU=qLrFcxKLe1tKMzd+FqvWTchjMgw@mail.gmail.com>
References: <2FB1D8AD-2C22-4A09-B7AF-0EFD6F0DBACA@sn3rd.com> <0469b84c-3009-427a-99ca-e7f6817f0b6c@www.fastmail.com> <CADZyTknhZDi2JD5WRbKEOGDafHjhTkUm6QhOhv1kkA9BT1nekw@mail.gmail.com> <37ff9a64-2749-4558-a675-5b251f06eb3a@www.fastmail.com> <CADZyTkkS-CipB00+JMRrjNZqXhyCTdBhV11oydCNCCeG_M6ORg@mail.gmail.com> <1cd34aff-915e-4f70-8f03-b644dab201c9@www.fastmail.com> <CADZyTknNN5vXifm3Qu=JnVpC5cD7MRb8xBMSbT9DDB07C4=gPg@mail.gmail.com> <99300d33-5a29-47e1-88ac-c83d385a9263@www.fastmail.com> <895cd06a-a75a-45f4-986d-c1eaa7d4c83d@www.fastmail.com> <CADZyTknpHkugotJxKUmSXU=qLrFcxKLe1tKMzd+FqvWTchjMgw@mail.gmail.com>
Date: Thu, 14 Nov 2019 09:02:00 -0800
From: "Christopher Wood" <caw@heapingbits.net>
To: "Daniel Migault" <daniel.migault@ericsson.com>
Cc: "TLS@ietf.org" <tls@ietf.org>
Content-Type: text/plain
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/nPnJL_-9WBR6aaJI43Agi8MJMgM>
Subject: Re: [TLS] WGLC for draft-ietf-tls-ticketrequests
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.29
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: <https://mailarchive.ietf.org/arch/browse/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: Thu, 14 Nov 2019 17:02:27 -0000

On Thu, Nov 14, 2019, at 8:57 AM, Daniel Migault wrote:
> Unless I am missing something, the text below seems to say otherwise. 
> Note: Although the resumption master secret depends on the client's
>    second flight, a server which does not request client authentication
>    MAY compute the remainder of the transcript independently and then
>    send a NewSessionTicket immediately upon sending its Finished rather
>    than waiting for the client Finished.  This might be appropriate in
>    cases where the client is expected to open multiple TLS connections
>    in parallel and would benefit from the reduced overhead of a
>    resumption handshake, for example.

Oops again. I only read the first sentence and drew the wrong conclusion. 

   At any time after the server has received the client Finished
   message, it MAY send a NewSessionTicket message.

> 
> 
> On Thu, Nov 14, 2019 at 11:52 AM Christopher Wood <caw@heapingbits.net> wrote:
> > On Thu, Nov 14, 2019, at 8:48 AM, Christopher Wood wrote:
> >  > On Thu, Nov 14, 2019, at 8:43 AM, Daniel Migault wrote:
> >  > > If tickets are sent right after the server Finished, before the the 
> >  > > client Finished, these are only triggered by the clientHello - at least 
> >  > > this is my understanding.
> >  > 
> >  > Yes, that's correct. I thought your comment was about post-handshake 
> >  > tickets (after confirmation from the client). Adding a note about this 
> >  > pre-handshake completion is fine with me.
> > 
> >  Scratch that! I forgot we limited this extension to TLS 1.3, which prohibits sending NSTs until the client finished is received (https://tools.ietf.org/html/rfc8446#section-4.6.1). 
> > 
> >  Best,
> >  Chris
> > 
> >  _______________________________________________
> >  TLS mailing list
> > TLS@ietf.org
> > https://www.ietf.org/mailman/listinfo/tls

v2.1.17 | Report a Bug | By Email