Re: [TLS] ALPN concerns
Dr Stephen Henson <lists@drh-consultancy.co.uk> Wed, 06 November 2013 20:56 UTC
Return-Path: <lists@drh-consultancy.co.uk>
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 D646011E8119 for <tls@ietfa.amsl.com>; Wed, 6 Nov 2013 12:56:26 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.599
X-Spam-Level:
X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Rz-caxXFmz3h for <tls@ietfa.amsl.com>; Wed, 6 Nov 2013 12:56:20 -0800 (PST)
Received: from claranet-outbound-smtp04.uk.clara.net (claranet-outbound-smtp04.uk.clara.net [195.8.89.37]) by ietfa.amsl.com (Postfix) with ESMTP id E33C711E8101 for <tls@ietf.org>; Wed, 6 Nov 2013 12:56:19 -0800 (PST)
Received: from drh-consultancy.demon.co.uk ([80.177.30.10]:48519 helo=[192.168.7.9]) by relay04.mail.eu.clara.net (relay.clara.net [213.253.3.44]:10465) with esmtpa (authdaemon_plain:drh) id 1VeA99-0005tF-Fe for tls@ietf.org (return-path <lists@drh-consultancy.co.uk>); Wed, 06 Nov 2013 20:56:16 +0000
Message-ID: <527AACEC.60109@drh-consultancy.co.uk>
Date: Wed, 06 Nov 2013 20:56:12 +0000
From: Dr Stephen Henson <lists@drh-consultancy.co.uk>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0
MIME-Version: 1.0
To: tls@ietf.org
References: <9A043F3CF02CD34C8E74AC1594475C736540E268@uxcn10-tdc06.UoA.auckland.ac.nz> <E774C81546D66E429BF56B1474C7EBBA012CE328CB@SEAEMBX01.olympus.F5Net.com> <CAL9PXLzLrCygvS5o-uBAdMbz0U7bZf_L-eQZsbK+Z-eY-XWtRA@mail.gmail.com> <527A86A7.5080700@drh-consultancy.co.uk>
In-Reply-To: <527A86A7.5080700@drh-consultancy.co.uk>
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7bit
Subject: Re: [TLS] ALPN concerns
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.12
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: Wed, 06 Nov 2013 20:56:27 -0000
On 06/11/2013 18:12, Dr Stephen Henson wrote: > On 06/11/2013 18:03, Adam Langley wrote: >> On Wed, Nov 6, 2013 at 1:00 PM, Xiaoyong Wu <X.Wu@f5.com> wrote: >>> As I am explaining this in detail, I would say that another work around on this would be making a client hello that exceeds 512 in length. >> >> ^^^ Holy crap. I wish I had known that sooner. That might solve the issue. >> > > Just did a quick test with OpenSSL on a couple of known "hang" machines. Seems > to work. > I added this to the OpenSSL master branch in case anyone wants to test it. If enabled it uses a dummy extension[1] to pad the ClientHello with enough zeroes to make it long enough. Steve. 1. Provisional name Workaround TLS Filler aka WTF ;-) -- Dr Stephen N. Henson. Core developer of the OpenSSL project: http://www.openssl.org/ Freelance consultant see: http://www.drh-consultancy.co.uk/ Email: shenson@drh-consultancy.co.uk, PGP key: via homepage.
- Re: [TLS] ALPN concerns Nico Williams
- [TLS] ALPN concerns Brian Smith
- Re: [TLS] ALPN concerns Yoav Nir
- Re: [TLS] ALPN concerns Martin Thomson
- Re: [TLS] ALPN concerns Yoav Nir
- Re: [TLS] ALPN concerns Geoffrey Keating
- Re: [TLS] ALPN concerns Yoav Nir
- Re: [TLS] ALPN concerns Peter Gutmann
- Re: [TLS] ALPN concerns John Mattsson
- Re: [TLS] ALPN concerns Yoav Nir
- Re: [TLS] ALPN concerns Xiaoyong Wu
- Re: [TLS] ALPN concerns Adam Langley
- Re: [TLS] ALPN concerns Yoav Nir
- Re: [TLS] ALPN concerns Dr Stephen Henson
- Re: [TLS] ALPN concerns Yutaka OIWA
- Re: [TLS] ALPN concerns Andrei Popov
- Re: [TLS] ALPN concerns Dr Stephen Henson
- Re: [TLS] ALPN concerns Adam Langley
- Re: [TLS] ALPN concerns Mark Nottingham
- Re: [TLS] ALPN concerns Wan-Teh Chang
- Re: [TLS] ALPN concerns Wan-Teh Chang
- Re: [TLS] ALPN concerns Xiaoyong Wu
- Re: [TLS] ALPN concerns Brian Smith
- Re: [TLS] ALPN concerns Andrei Popov
- Re: [TLS] ALPN concerns Brian Smith
- Re: [TLS] ALPN concerns Nikos Mavrogiannopoulos
- Re: [TLS] ALPN concerns Andrei Popov
- Re: [TLS] ALPN concerns Pascal Urien