Re: [IPsec] Working Group Last Call: draft-ietf-ipsecme-aes-ctr-ikev2-02.txt

Paul Hoffman <paul.hoffman@vpnc.org> Thu, 17 September 2009 14:48 UTC

Return-Path: <paul.hoffman@vpnc.org>
X-Original-To: ipsec@core3.amsl.com
Delivered-To: ipsec@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 2A14F3A6800 for <ipsec@core3.amsl.com>; Thu, 17 Sep 2009 07:48:00 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.951
X-Spam-Level:
X-Spam-Status: No, score=-4.951 tagged_above=-999 required=5 tests=[AWL=1.095, BAYES_00=-2.599, HELO_MISMATCH_COM=0.553, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tnmGNjwLWRp9 for <ipsec@core3.amsl.com>; Thu, 17 Sep 2009 07:47:59 -0700 (PDT)
Received: from balder-227.proper.com (Balder-227.Proper.COM [192.245.12.227]) by core3.amsl.com (Postfix) with ESMTP id 4B1353A67F2 for <ipsec@ietf.org>; Thu, 17 Sep 2009 07:47:59 -0700 (PDT)
Received: from [10.20.30.158] (75-101-30-90.dsl.dynamic.sonic.net [75.101.30.90]) (authenticated bits=0) by balder-227.proper.com (8.14.2/8.14.2) with ESMTP id n8HEiCOf085410 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 17 Sep 2009 07:44:14 -0700 (MST) (envelope-from paul.hoffman@vpnc.org)
Mime-Version: 1.0
Message-Id: <p0624080dc6d7fb15d275@[10.20.30.158]>
In-Reply-To: <19122.7243.53280.198935@fireball.kivinen.iki.fi>
References: <p06240810c6d6a8611c82@[10.20.30.158]> <19122.7243.53280.198935@fireball.kivinen.iki.fi>
Date: Thu, 17 Sep 2009 07:44:11 -0700
To: Tero Kivinen <kivinen@iki.fi>
From: Paul Hoffman <paul.hoffman@vpnc.org>
Content-Type: text/plain; charset="us-ascii"
Cc: IPsecme WG <ipsec@ietf.org>
Subject: Re: [IPsec] Working Group Last Call: draft-ietf-ipsecme-aes-ctr-ikev2-02.txt
X-BeenThere: ipsec@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Discussion of IPsec protocols <ipsec.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/ipsec>, <mailto:ipsec-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ipsec>
List-Post: <mailto:ipsec@ietf.org>
List-Help: <mailto:ipsec-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipsec>, <mailto:ipsec-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 17 Sep 2009 14:48:00 -0000

At 2:23 PM +0300 9/17/09, Tero Kivinen wrote:
>When reading the roadmap I noticed that camellia-ctr is also not
>defined for IKEv2 SAs, so I was wondering if the text in this document
>could be made generic enough so any counter mode cipher could be used.

It is not clear to me that future counter modes will fit today's generic definition. I don't think it is bad to require a specific definition for each application of counter mode.

>Other option is of course to include text to ikev2bis which specifies
>how to use counter mode ciphers when protecting IKEv2 SAs.

This seems like overkill and possibly limiting to future applications of counter mode.

--Paul Hoffman, Director
--VPN Consortium