IETF Logo Mail Archive

Re: [Ace] How to specify DTLS MTI in COAP-EST

Michael Richardson <mcr+ietf@sandelman.ca> Thu, 07 June 2018 17:41 UTC

Return-Path: <mcr+ietf@sandelman.ca>
X-Original-To: ace@ietfa.amsl.com
Delivered-To: ace@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 152E2130F75 for <ace@ietfa.amsl.com>; Thu, 7 Jun 2018 10:41:58 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.2
X-Spam-Level:
X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=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 S57dgBM5nWgZ for <ace@ietfa.amsl.com>; Thu, 7 Jun 2018 10:41:55 -0700 (PDT)
Received: from tuna.sandelman.ca (tuna.sandelman.ca [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D9BF4131149 for <ace@ietf.org>; Thu, 7 Jun 2018 10:41:54 -0700 (PDT)
Received: from sandelman.ca (obiwan.sandelman.ca [IPv6:2607:f0b0:f:2::247]) by tuna.sandelman.ca (Postfix) with ESMTP id 2143020090; Thu, 7 Jun 2018 13:55:24 -0400 (EDT)
Received: by sandelman.ca (Postfix, from userid 179) id 6B47B3033; Thu, 7 Jun 2018 13:41:17 -0400 (EDT)
Received: from sandelman.ca (localhost [127.0.0.1]) by sandelman.ca (Postfix) with ESMTP id 687FE3032; Thu, 7 Jun 2018 13:41:17 -0400 (EDT)
From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>, "ace@ietf.org" <ace@ietf.org>
In-Reply-To: <VI1PR0801MB2112950E1677D701165C74E2FA640@VI1PR0801MB2112.eurprd08.prod.outlook.com>
References: <13635.1528327933@localhost> <CE664422-ED4B-43FE-A531-4EAA090CA036@vigilsec.com> <VI1PR0801MB2112950E1677D701165C74E2FA640@VI1PR0801MB2112.eurprd08.prod.outlook.com>
X-Mailer: MH-E 8.6; nmh 1.7+dev; GNU Emacs 24.5.1
X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0; <'$9xN5Ub# z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m<nPbLgmtKK-5dC@#:k
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="=-=-="; micalg="pgp-sha1"; protocol="application/pgp-signature"
Date: Thu, 07 Jun 2018 13:41:17 -0400
Message-ID: <12464.1528393277@localhost>
Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/9uHRjXsD_90mFhlPert47R1kN7k>
Subject: Re: [Ace] How to specify DTLS MTI in COAP-EST
X-BeenThere: ace@ietf.org
X-Mailman-Version: 2.1.26
Precedence: list
List-Id: "Authentication and Authorization for Constrained Environments \(ace\)" <ace.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ace>, <mailto:ace-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ace/>
List-Post: <mailto:ace@ietf.org>
List-Help: <mailto:ace-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ace>, <mailto:ace-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 07 Jun 2018 17:41:59 -0000

Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
    > why don't you just reference https://tools.ietf.org/html/rfc7925?

Ignorance :-)
Thank you, I think that we will reference it then;

Section 4.4 includes:

	At the time of writing, the
        recommended curve is secp256r1, and the use of uncompressed points
        follows the recommendation in CoAP.  Note that standardization for
        Curve25519 (for ECDHE) is ongoing (see [RFC7748]), and support for
        this curve will likely be required in the future.

which is what we want to say anyway.

    > I am not a big fan of making all sorts of different crypto
    > recommendations in our specs that differ slightly. 

-- 
]               Never tell me the odds!                 | ipv6 mesh networks [ 
]   Michael Richardson, Sandelman Software Works        | network architect  [ 
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [

v2.23.0 | Report a Bug | By Email