Re: [TLS] Doing without renegotiation

Yoav Nir <ynir.ietf@gmail.com> Thu, 17 April 2014 07:48 UTC

Return-Path: <ynir.ietf@gmail.com>
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 AB2E81A004D for <tls@ietfa.amsl.com>; Thu, 17 Apr 2014 00:48:06 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, 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 IWZ4jjK-fS-o for <tls@ietfa.amsl.com>; Thu, 17 Apr 2014 00:48:02 -0700 (PDT)
Received: from mail-wi0-x231.google.com (mail-wi0-x231.google.com [IPv6:2a00:1450:400c:c05::231]) by ietfa.amsl.com (Postfix) with ESMTP id 237501A0011 for <tls@ietf.org>; Thu, 17 Apr 2014 00:48:01 -0700 (PDT)
Received: by mail-wi0-f177.google.com with SMTP id cc10so416599wib.4 for <tls@ietf.org>; Thu, 17 Apr 2014 00:47:58 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=ItZTcAKsvQ1w+KFyfwtVo14HFd278mdz92YNCmnJTb4=; b=rPYDtO++RvW38EMfE+RmLXM3p/z6wJlmZfzrYl+8hAWRHa0k4M3X5sNFenft/+wEsr KBuq0IfC4A/QmOgOmTVDKRY6auhI2hyXVgNPq1uQpDC4/Sau11zhqmaTps9a+2LmO8W4 IfyNMVX2baECLFQK17wa6BELLObIvm5+UXOWbOEoLHLCKuWnXksU0W5urR0pRy3WX9OK 1zNxKUGDOktOOlxw/l/gciWkIVwDnLW2A/PDiMiE6e+HBGZahcVW2Xy/b8aWc4fgl+sP ozzLBOPgO0JtkHB9K8cN8C0IoO4uyH3rFclzV06/ZRfHLrE4VtTLQxSzkal9BSpviIeF ifKQ==
X-Received: by 10.180.76.146 with SMTP id k18mr13722674wiw.5.1397720878115; Thu, 17 Apr 2014 00:47:58 -0700 (PDT)
Received: from [172.24.248.99] (dyn32-131.checkpoint.com. [194.29.32.131]) by mx.google.com with ESMTPSA id gc2sm3281638wic.3.2014.04.17.00.47.57 for <multiple recipients> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 17 Apr 2014 00:47:57 -0700 (PDT)
Content-Type: text/plain; charset="windows-1252"
Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\))
From: Yoav Nir <ynir.ietf@gmail.com>
In-Reply-To: <20140417035011.GA25499@localhost>
Date: Thu, 17 Apr 2014 10:47:52 +0300
Content-Transfer-Encoding: quoted-printable
Message-Id: <2763DE41-00D1-4C86-8982-A11B3A77D40C@gmail.com>
References: <20140417035011.GA25499@localhost>
To: Nico Williams <nico@cryptonector.com>
X-Mailer: Apple Mail (2.1874)
Archived-At: http://mailarchive.ietf.org/arch/msg/tls/Z46MZNHs0gZ4Rl8c0YHlym6m7ak
Cc: tls@ietf.org
Subject: Re: [TLS] Doing without renegotiation
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: Thu, 17 Apr 2014 07:48:06 -0000

On Apr 17, 2014, at 6:50 AM, Nico Williams <nico@cryptonector.com> wrote:

> 
> - authenticate the client when needed rather than always at handshake time

<snip />

> - For authentication other than that provided by the initial handshake
>   I propose application-specific solutions.

<snip />

>    - server wants client to authenticate
> 
>      In a protocol like HTTP that'd be a 401 indicating what methods
>      the client can choose from...  Standard stuff.  We'd add a public
>      key / PKI method whereby the client sends a signature of the TLS
>      channel binding, along with any cert chain, OCSP responses, …

Do you mean something like Martin’s proposal ([1][2]) or doing the whole thing in HTTP as a new HTTP authentication method?

Yoav

[1] http://tools.ietf.org/html/draft-thomson-httpbis-catch-00
[2] http://tools.ietf.org/html/draft-thomson-tls-care-00