Re: [dane] DANE-EE(3) certificate matching rules?

Paul Wouters <paul@cypherpunks.ca> Tue, 18 March 2014 16:21 UTC

Return-Path: <paul@cypherpunks.ca>
X-Original-To: dane@ietfa.amsl.com
Delivered-To: dane@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 32D431A06E1 for <dane@ietfa.amsl.com>; Tue, 18 Mar 2014 09:21:22 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9] 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 mJopHj9SI8ho for <dane@ietfa.amsl.com>; Tue, 18 Mar 2014 09:21:20 -0700 (PDT)
Received: from bofh.nohats.ca (bofh.nohats.ca [76.10.157.69]) by ietfa.amsl.com (Postfix) with ESMTP id BDF3A1A0476 for <dane@ietf.org>; Tue, 18 Mar 2014 09:21:20 -0700 (PDT)
Received: from bofh.nohats.ca (bofh.nohats.ca [127.0.0.1]) by bofh.nohats.ca (Postfix) with ESMTP id A6144800AF; Tue, 18 Mar 2014 12:21:11 -0400 (EDT)
Received: from localhost (paul@localhost) by bofh.nohats.ca (8.14.7/8.14.7/Submit) with ESMTP id s2IGLAP7027765; Tue, 18 Mar 2014 12:21:11 -0400
X-Authentication-Warning: bofh.nohats.ca: paul owned process doing -bs
Date: Tue, 18 Mar 2014 12:21:10 -0400 (EDT)
From: Paul Wouters <paul@cypherpunks.ca>
X-X-Sender: paul@bofh.nohats.ca
To: Martin Rex <mrex@sap.com>
In-Reply-To: <20140317233325.601E81AC59@ld9781.wdf.sap.corp>
Message-ID: <alpine.LFD.2.10.1403181219540.25356@bofh.nohats.ca>
References: <20140317233325.601E81AC59@ld9781.wdf.sap.corp>
User-Agent: Alpine 2.10 (LFD 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII
Archived-At: http://mailarchive.ietf.org/arch/msg/dane/dGtzzjqLNQIzJTLug1hamBuAyM0
Cc: dane WG list <dane@ietf.org>
Subject: Re: [dane] DANE-EE(3) certificate matching rules?
X-BeenThere: dane@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DNS-based Authentication of Named Entities <dane.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dane>, <mailto:dane-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/dane/>
List-Post: <mailto:dane@ietf.org>
List-Help: <mailto:dane-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dane>, <mailto:dane-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 18 Mar 2014 16:21:22 -0000

On Tue, 18 Mar 2014, Martin Rex wrote:

> I strongly dislike this idea, and would really appreciate instead
> a requirement that any X.509 certificates that are generated for use
> with DANE-EE(3) *MUST* be generated with a sufficiently liberal
> validity period that interop is not going to break if a DANE client
> enforces the X.509 asserted validity period.

You can't because we now have EE certs that could only contain SBKI and
no other x.509 legacy.

Paul