Re: [TLS] Ala Carte Cipher suites - was: DSA should die
Geoffrey Keating <geoffk@geoffk.org> Mon, 13 April 2015 21:09 UTC
Return-Path: <geoffk@geoffk.org>
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 8E9EA1A8733 for <tls@ietfa.amsl.com>; Mon, 13 Apr 2015 14:09:16 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0.895
X-Spam-Level:
X-Spam-Status: No, score=0.895 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FH_RELAY_NODNS=1.451, HELO_MISMATCH_COM=0.553, RDNS_NONE=0.793, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=no
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 dH9lMLNHLz-l for <tls@ietfa.amsl.com>; Mon, 13 Apr 2015 14:09:14 -0700 (PDT)
Received: from dragaera.releasedominatrix.com (unknown [198.0.208.83]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4945A1A874B for <tls@ietf.org>; Mon, 13 Apr 2015 14:09:06 -0700 (PDT)
Received: by dragaera.releasedominatrix.com (Postfix, from userid 501) id 7CFDC33D223; Mon, 13 Apr 2015 21:09:05 +0000 (UTC)
Sender: geoffk@localhost.localdomain
To: Martin Thomson <martin.thomson@gmail.com>
References: <20150401201221.163745c2@pc1.fritz.box> <CAK9dnSyKf7AY11h1i1h+SudRc-NmTZE5wC682YKhNsxnfV5ShQ@mail.gmail.com> <CAK3OfOgPbADQ1CvOs=8T7ee6f_T+bi3F6GCdBtxufQpznzYbQA@mail.gmail.com> <201504021257.09955.davemgarrett@gmail.com> <CAOgPGoDJTcLn4j90wNu=mhCZJnb2WUuAvM5TN6KOO7RdC==qHQ@mail.gmail.com> <551DE914.4010804@nthpermutation.com> <CAFewVt6jKaQh9Z-ySQJr_9PWsBvn41RNk6PNXMdouLwywn8-wA@mail.gmail.com> <CABkgnnXoBmSfoK5Ht5x7jqf3zGB-mDntcVRMVzKgr2wfsixgNg@mail.gmail.com>
From: Geoffrey Keating <geoffk@geoffk.org>
Date: Mon, 13 Apr 2015 14:09:05 -0700
In-Reply-To: <CABkgnnXoBmSfoK5Ht5x7jqf3zGB-mDntcVRMVzKgr2wfsixgNg@mail.gmail.com>
Message-ID: <m2r3rnzqfi.fsf@localhost.localdomain>
Lines: 21
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Archived-At: <http://mailarchive.ietf.org/arch/msg/tls/OJN5TZvg841omw_wkyU-ur0RfR4>
Cc: "<tls@ietf.org>" <tls@ietf.org>
Subject: Re: [TLS] Ala Carte Cipher suites - was: DSA should die
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, 13 Apr 2015 21:09:16 -0000
Martin Thomson <martin.thomson@gmail.com> writes: > On 3 April 2015 at 17:05, Brian Smith <brian@briansmith.org> wrote: > > I don't think the current mechanism is problematic > > enough (at all, really) to justify that effort. > > I think that I've the same view. > > Then you have to consider interaction problems where some > implementations have hardware for certain things, and software for > others. Not only does that produce strong preferences for some things > over others, it also can lead to holes in support tables, making a la > carte selection tricky. > > That was always the clincher for me. I agree. In particular I don't think we've simplified anything if implementations have to have a list of invalid combinations, or have to know that certain ciphers are to be used only with matching key exchange algorithms (for example, use the GOST key exchange with the GOST symmetric cipher).
- Re: [TLS] DSA should die Yoav Nir
- Re: [TLS] DSA should die Dave Garrett
- [TLS] DSA should die Hanno Böck
- Re: [TLS] DSA should die Aaron Zauner
- Re: [TLS] DSA should die David Benjamin
- Re: [TLS] DSA should die Stephen Checkoway
- Re: [TLS] DSA should die Tony Arcieri
- Re: [TLS] DSA should die Bill Frantz
- Re: [TLS] DSA should die Tom Ritter
- Re: [TLS] DSA should die Viktor Dukhovni
- Re: [TLS] DSA should die Stephen Farrell
- Re: [TLS] DSA should die Nico Williams
- Re: [TLS] DSA should die Stephen Farrell
- Re: [TLS] DSA should die Viktor Dukhovni
- Re: [TLS] DSA should die Dave Garrett
- Re: [TLS] DSA should die Martin Thomson
- Re: [TLS] DSA should die Nico Williams
- Re: [TLS] DSA should die Martin Rex
- Re: [TLS] DSA should die Watson Ladd
- Re: [TLS] DSA should die Nico Williams
- Re: [TLS] DSA should die CodesInChaos
- Re: [TLS] DSA should die Martin Thomson
- Re: [TLS] DSA should die Dave Garrett
- Re: [TLS] DSA should die Nico Williams
- Re: [TLS] DSA should die Ilari Liusvaara
- Re: [TLS] DSA should die Joseph Salowey
- Re: [TLS] DSA should die Kurt Roeckx
- Re: [TLS] DSA should die Michael StJohns
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Michael StJohns
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Brian Smith
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Tony Arcieri
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Martin Thomson
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Dave Garrett
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Aaron Zauner
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Dave Garrett
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Viktor Dukhovni
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Salz, Rich
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Tony Arcieri
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Yoav Nir
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Brian Smith
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Tony Arcieri
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Ilari Liusvaara
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Brian Sniffen
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Viktor Dukhovni
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Viktor Dukhovni
- Re: [TLS] Negotiate only symmetric cipher via cip… Dave Garrett
- Re: [TLS] Negotiate only symmetric cipher via cip… Daniel Kahn Gillmor
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Aaron Zauner
- Re: [TLS] Negotiate only symmetric cipher via cip… Dave Garrett
- Re: [TLS] Negotiate only symmetric cipher via cip… Daniel Kahn Gillmor
- Re: [TLS] Negotiate only symmetric cipher via cip… Dave Garrett
- Re: [TLS] Negotiate only symmetric cipher via cip… Daniel Kahn Gillmor
- Re: [TLS] Negotiate only symmetric cipher via cip… Andrei Popov
- Re: [TLS] Negotiate only symmetric cipher via cip… Blumenthal, Uri - 0553 - MITLL
- Re: [TLS] Negotiate only symmetric cipher via cip… Viktor Dukhovni
- Re: [TLS] Negotiate only symmetric cipher via cip… Dave Garrett
- Re: [TLS] Negotiate only symmetric cipher via cip… Daniel Kahn Gillmor
- Re: [TLS] Negotiate only symmetric cipher via cip… Ilari Liusvaara
- Re: [TLS] Negotiate only symmetric cipher via cip… Dmitry Belyavsky
- Re: [TLS] Negotiate only symmetric cipher via cip… Daniel Kahn Gillmor
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Geoffrey Keating
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Yoav Nir
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Viktor Dukhovni
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Blumenthal, Uri - 0553 - MITLL
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Geoffrey Keating
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Viktor Dukhovni
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Brian Smith
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Brian Smith
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Daniel Kahn Gillmor
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Salz, Rich
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Viktor Dukhovni
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Dave Garrett
- Re: [TLS] Negotiate only symmetric cipher via cip… Ilari Liusvaara
- Re: [TLS] Ala Carte Cipher suites - was: DSA shou… Yoav Nir