Re: [TLS] ALPN concerns

Adam Langley <agl@google.com> Wed, 06 November 2013 21:01 UTC

Return-Path: <agl@google.com>
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 1448511E8119 for <tls@ietfa.amsl.com>; Wed, 6 Nov 2013 13:01:06 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.978
X-Spam-Level:
X-Spam-Status: No, score=-1.978 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, NO_RELAYS=-0.001]
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 OFPjFGyUWdVD for <tls@ietfa.amsl.com>; Wed, 6 Nov 2013 13:01:05 -0800 (PST)
Received: from mail-vb0-x229.google.com (mail-vb0-x229.google.com [IPv6:2607:f8b0:400c:c02::229]) by ietfa.amsl.com (Postfix) with ESMTP id 82C2711E80E2 for <tls@ietf.org>; Wed, 6 Nov 2013 13:01:05 -0800 (PST)
Received: by mail-vb0-f41.google.com with SMTP id w8so43783vbj.28 for <tls@ietf.org>; Wed, 06 Nov 2013 13:01:05 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=9RRlowEYzN1Drp26MaprAqqmIymiiUpD3kKy3gKJ7ZA=; b=PAxG2cVUaZhy4MewIZSr494LHm4SXa6ofBOiuCBJEwkM/rPe5t/Fm2tb5GGi6vvA4y i02zT92wsGo85r6wbwYqb1q8UBJjkJhSnuN3KftqI/WDKGvaGCPojjyjza7sG/OjxSqJ NOOiOaHp27keAWv7sx2Bm8OfEQAX21Xvw5i2dm0BZUHktU+YRuovZOHZOAwOUP/wHxXC x6cSZLa+ty6QFqQXQx1H6MtE38Xm7Aqaf1NmI1HNr2lSjDC2SdyEGuw2+/qbkYPuXr3d d9AAvXSe9Shcz+C2l4OOZAauYuUsJ0VotZrIV6Eg0JrVRye5IdCJM6nICwSrFt68V6nP J+jA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=9RRlowEYzN1Drp26MaprAqqmIymiiUpD3kKy3gKJ7ZA=; b=IjWzydk+Tx+G+MclqQkQ3XTmR8NYnYI7FWBhHWP9QqxwKLBDAa737vP/Ica5QZmw+2 l8KQoZn4t2MCJ9nJXzVpDOf3bgq1iXn+mhD3CDCv0fqYLAVUdjKTlxn/ICnypYBF8rze w3b4Ei3bJQxwwKqen2SHqb9CibYc40xpoVsP2ELAqtUhuaPR50G6dFKSv6oC8Xxny3Fx q1fVItXrHc3W79e9zCIkiawdiHR8cNLR2QGsvz11ipOu62mdeS1WhuKBjaYRZBMLNQ8L cTFPJwzh14RDPIH16/xbdOvrPNIeFQv9HwM0Cibt6Dvzl1OrTUu54MXinDaBgzN8Zujt 1tsw==
X-Gm-Message-State: ALoCoQnAd6DfONi33/kO++eDKHuCS+JxFVhDKWV8cvRsxPIZ+UIrouPe3EIsqiZHXjKz5E3ndNyXJwTFJ9beGRj7/flalSLcXDRVs0/YONdZrLZ9npj10byGNel419PXtvjZLwo/BOtgXvC+Zyen2fC0n/Wb2+celopI6Wd5TK9spxD3ll6LoWHclUTwxDOf7QQbK3aNbIh/
X-Received: by 10.221.6.195 with SMTP id ol3mr173078vcb.34.1383771664908; Wed, 06 Nov 2013 13:01:04 -0800 (PST)
MIME-Version: 1.0
Received: by 10.52.100.40 with HTTP; Wed, 6 Nov 2013 13:00:44 -0800 (PST)
In-Reply-To: <527AACEC.60109@drh-consultancy.co.uk>
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> <527AACEC.60109@drh-consultancy.co.uk>
From: Adam Langley <agl@google.com>
Date: Wed, 06 Nov 2013 16:00:44 -0500
Message-ID: <CAL9PXLxEh50MTaixVrmm2-1KXUkfoiCz+r=jTqvUwQ9D9_Bwag@mail.gmail.com>
To: Dr Stephen Henson <lists@drh-consultancy.co.uk>
Content-Type: text/plain; charset="UTF-8"
Cc: "tls@ietf.org" <tls@ietf.org>
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 21:01:06 -0000

On Wed, Nov 6, 2013 at 3:56 PM, Dr Stephen Henson
<lists@drh-consultancy.co.uk> wrote:
> 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.

Likewise for Chrome: https://codereview.chromium.org/62103003


Cheers

AGL