[DNSOP] ZONEMD was Re: [Ext] I-D Action: draft-ietf-dnsop-svcb-https-05.txt

Mark Andrews <marka@isc.org> Tue, 11 May 2021 00:45 UTC

Return-Path: <marka@isc.org>
X-Original-To: dnsop@ietfa.amsl.com
Delivered-To: dnsop@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AEE743A3149 for <dnsop@ietfa.amsl.com>; Mon, 10 May 2021 17:45:09 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -7.097
X-Spam-Level:
X-Spam-Status: No, score=-7.097 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=isc.org header.b=hrmL3p+t; dkim=pass (1024-bit key) header.d=isc.org header.b=MZty0Urn
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 Iybm4LKdL78t for <dnsop@ietfa.amsl.com>; Mon, 10 May 2021 17:45:04 -0700 (PDT)
Received: from mx.pao1.isc.org (mx.pao1.isc.org [149.20.64.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B588A3A3142 for <dnsop@ietf.org>; Mon, 10 May 2021 17:45:04 -0700 (PDT)
Received: from zmx1.isc.org (zmx1.isc.org [149.20.0.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx.pao1.isc.org (Postfix) with ESMTPS id 0E3C53AB279; Tue, 11 May 2021 00:45:02 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=isc.org; s=ostpay; t=1620693903; bh=hQmu1plWCqM8xBfQLhhIUKP91Wehr/BnKBAFG8Z1hVM=; h=Subject:From:In-Reply-To:Date:Cc:References:To; b=hrmL3p+tlPLm3Gb5vJPv9PO4DxAc1QBoOydO1TZoP+DvWM8Br0uwRJfOKMTKmUnnL FBtV1KgIH2sMgWXaWTwsNHqbuL251qlbCoO31txBPatR5rE8zFXtXsZk6EAFg0Q9hF YIiH6IATJd70ZOtPMXHvKbFuInvDoNUV2tWWfwxY=
Received: from zmx1.isc.org (localhost.localdomain [127.0.0.1]) by zmx1.isc.org (Postfix) with ESMTPS id D534716008B; Tue, 11 May 2021 00:45:01 +0000 (UTC)
Received: from localhost (localhost.localdomain [127.0.0.1]) by zmx1.isc.org (Postfix) with ESMTP id A7463160090; Tue, 11 May 2021 00:45:01 +0000 (UTC)
DKIM-Filter: OpenDKIM Filter v2.9.2 zmx1.isc.org A7463160090
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isc.org; s=05DFB016-56A2-11EB-AEC0-15368D323330; t=1620693901; bh=GAN/f1GxB0andvEz/nBUH36LAE4ybrDxPpQk64dZ4nI=; h=Content-Type:Mime-Version:Subject:From:Date: Content-Transfer-Encoding:Message-Id:To; b=MZty0Urn8/lFkhIfKGB3zHasolm9jeRHgUROzkffzdyp3xaGzBoWKwknZJKGsQw4S 9koJ64pVpoHYT0JXXtG/i0NJIxsyH8Y8Iw+WVfufJowdVvlmtl6rLAiMdVpyMwQjHr uBhrjKRcW0cOjUYWTNFgmj+qr1xlmt7+0u6DMf8E=
Received: from zmx1.isc.org ([127.0.0.1]) by localhost (zmx1.isc.org [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id MfaYFiCmefa5; Tue, 11 May 2021 00:45:01 +0000 (UTC)
Received: from [172.30.42.67] (n49-177-132-25.bla3.nsw.optusnet.com.au [49.177.132.25]) by zmx1.isc.org (Postfix) with ESMTPSA id 8A91416008B; Tue, 11 May 2021 00:45:00 +0000 (UTC)
Content-Type: text/plain; charset=utf-8
Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.7\))
From: Mark Andrews <marka@isc.org>
In-Reply-To: <554EF35D-E06B-4F7B-9DDA-90DA8470F6F3@icann.org>
Date: Tue, 11 May 2021 10:44:57 +1000
Cc: dnsop <dnsop@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <EC0B2E2A-308F-4232-85B9-60289437E52C@isc.org>
References: <F4CE48A1-7AB0-45D0-97FF-158CE3A04EE1@icann.org> <3EE971EE-0777-44D6-9CD2-771B92FFE938@hopcount.ca> <1d822219-8ab9-2cb7-d0a4-9b8afc39058d@powerdns.com> <2952D408-117B-40D0-B859-7A8E4111629E@hopcount.ca> <CAHbrMsD+uiaYQ8i58VRjF=3AtW9uAoAtgbKzNzrPZC3QCmD2pQ@mail.gmail.com> <25971B7D-718C-42E3-8F04-2D235776C66B@icann.org> <4312DB4B-A9E0-48E8-BD79-7358080065F4@isc.org> <554EF35D-E06B-4F7B-9DDA-90DA8470F6F3@icann.org>
To: Paul Hoffman <paul.hoffman@icann.org>
X-Mailer: Apple Mail (2.3445.9.7)
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/JoJtqtpkMhg3B4RWo5nmDtG10xo>
Subject: [DNSOP] ZONEMD was Re: [Ext] I-D Action: draft-ietf-dnsop-svcb-https-05.txt
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF DNSOP WG mailing list <dnsop.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnsop>, <mailto:dnsop-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dnsop/>
List-Post: <mailto:dnsop@ietf.org>
List-Help: <mailto:dnsop-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnsop>, <mailto:dnsop-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 11 May 2021 00:45:10 -0000


> On 11 May 2021, at 09:20, Paul Hoffman <paul.hoffman@icann.org> wrote:
> 
> On May 10, 2021, at 4:14 PM, Mark Andrews <marka@isc.org> wrote:
>> Actually, the process problem is that record format keeps changing AFTER the code point has been assigned and the record format THEORETICALLY been FIXED.
> 
> Mark makes an excellent point, one that people in the DNS world routinely forget.

Just for reference ZONEMD switched two fields between draft-wessels-dns-zone-digest-05.txt and
RFC 8976.  "Digest Type | Reserved” -> "Scheme | Hash Algorithm”.  This resulted in BIND rejecting
zones with ZONEMD records using SHA-512 digests (digest field has the wrong length for Digest Type 1).
Renaming fields is fine.  Reordering/repurposing non reserved isn’t as it breaks stuff.  Now we are
making BIND compatible with RFC 8976 but we should never have been put in this position.

> --Paul Hoffman_______________________________________________
> DNSOP mailing list
> DNSOP@ietf.org
> https://www.ietf.org/mailman/listinfo/dnsop

-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org