Re: [Ntp] Antw: [EXT] Re: Quick review of WGLC for status change for draft‑ietf‑ntp‑update‑registries

Miroslav Lichvar <mlichvar@redhat.com> Tue, 09 August 2022 08:02 UTC

Return-Path: <mlichvar@redhat.com>
X-Original-To: ntp@ietfa.amsl.com
Delivered-To: ntp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3F964C15A734 for <ntp@ietfa.amsl.com>; Tue, 9 Aug 2022 01:02:09 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -7.69
X-Spam-Level:
X-Spam-Status: No, score=-7.69 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.582, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=redhat.com
Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AnqoLr-T7USE for <ntp@ietfa.amsl.com>; Tue, 9 Aug 2022 01:02:06 -0700 (PDT)
Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 A26D1C15A733 for <ntp@ietf.org>; Tue, 9 Aug 2022 01:02:06 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1660032125; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=FQ51BYIhMo3iUGbwLId3Crg0O/ym+8RZLv/SLcO3Zgg=; b=bD5RZHOLuJ8H7Wyu1mrmCm1HPOgirNLzOWefRQfBoDJ3ADSR/ecjLCq8H0hBXPOzoUFQ42 gUXBoKRPQoq/EhdMpbzLb4TaRSFI+bavPzBlp9vAXoqE47JKwEhMevQzRzB/gsXDmQ0lEf mo5eA40O8w9++kTkzDVCrQXvdrdTiMo=
Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-348-kYmMUYnYNpmS5D_ZPhlyaw-1; Tue, 09 Aug 2022 04:02:04 -0400
X-MC-Unique: kYmMUYnYNpmS5D_ZPhlyaw-1
Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id BFCCC805F32; Tue, 9 Aug 2022 08:02:03 +0000 (UTC)
Received: from localhost (unknown [10.43.135.229]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D5530140EBE3; Tue, 9 Aug 2022 08:02:02 +0000 (UTC)
Date: Tue, 09 Aug 2022 10:02:01 +0200
From: Miroslav Lichvar <mlichvar@redhat.com>
To: Harlan Stenn <stenn@nwtime.org>
Cc: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>, "ntp@ietf.org" <ntp@ietf.org>, odonoghue@isoc.org
Message-ID: <YvIUeUAkpXR7/lDS@localhost>
References: <PH0PR06MB706126984E4442EF32F8242AC2999@PH0PR06MB7061.namprd06.prod.outlook.com> <da155c84-2c70-2e3b-59eb-03e380806cf2@nwtime.org> <PH0PR06MB70611F2331D8255F7E2B6604C2999@PH0PR06MB7061.namprd06.prod.outlook.com> <0b4c7efa-3977-b588-0974-33b6a9437e52@nwtime.org> <62F0E9D3020000A10004C2EC@gwsmtp.uni-regensburg.de> <2d66fa3e-f750-e3d2-511e-594fa40d993d@nwtime.org> <62F0F4C7020000A10004C310@gwsmtp.uni-regensburg.de> <8faf7c64-8896-97ca-fa2e-2d762c7da1d8@nwtime.org> <YvEIf3g+Jjm27pUz@localhost> <f6b2b8ce-c4f8-72d9-8004-2bb13e1176e4@nwtime.org>
MIME-Version: 1.0
In-Reply-To: <f6b2b8ce-c4f8-72d9-8004-2bb13e1176e4@nwtime.org>
X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7
X-Mimecast-Spam-Score: 0
X-Mimecast-Originator: redhat.com
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
Archived-At: <https://mailarchive.ietf.org/arch/msg/ntp/GtAXOYwHjGhbhX4OG0-uGOHGQaE>
Subject: Re: [Ntp] Antw: [EXT] Re: Quick review of WGLC for status change for draft‑ietf‑ntp‑update‑registries
X-BeenThere: ntp@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: Network Time Protocol <ntp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ntp>, <mailto:ntp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ntp/>
List-Post: <mailto:ntp@ietf.org>
List-Help: <mailto:ntp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ntp>, <mailto:ntp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 09 Aug 2022 08:02:09 -0000

On Mon, Aug 08, 2022 at 06:48:28PM -0700, Harlan Stenn wrote:
> On 8/8/2022 5:58 AM, Miroslav Lichvar wrote:
> > If you allow short extension fields, you will not be able to detect
> > whether a request contains an unknown extension field or an Autokey
> > MAC using an old cookie. The protocol may be able recover, but that's
> > not how things should be done.
> > 
> > Here is an example:
> > 
> > 04 1b 00 14 cc e2 c8 47 71 95 79 64 c4 71 e8 72 7e bf fb cd
> > 
> > Which of the two is it?
> > 
> 
> More context, please.
> 
> What is that set of bytes?

It's the UDP data following the NTP header.

-- 
Miroslav Lichvar