Re: The TCP and UDP checksum algorithm may soon need updating
Benjamin Kaduk <kaduk@mit.edu> Mon, 08 June 2020 02:46 UTC
Return-Path: <kaduk@mit.edu>
X-Original-To: ietf@ietfa.amsl.com
Delivered-To: ietf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BFC993A0965; Sun, 7 Jun 2020 19:46:55 -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, SPF_HELO_NONE=0.001, SPF_PASS=-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 FbQXMVyjcVYP; Sun, 7 Jun 2020 19:46:54 -0700 (PDT)
Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (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 335F53A0964; Sun, 7 Jun 2020 19:46:53 -0700 (PDT)
Received: from mit.edu ([24.16.140.251]) (authenticated bits=56) (User authenticated as kaduk@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 0582kmoN022425 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 7 Jun 2020 22:46:51 -0400
Date: Sun, 07 Jun 2020 19:46:47 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: "Salz, Rich" <rsalz=40akamai.com@dmarc.ietf.org>
Cc: Michael Thomas <mike@mtcc.com>, Joseph Touch <touch@strayalpha.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: The TCP and UDP checksum algorithm may soon need updating
Message-ID: <20200608024647.GU58497@mit.edu>
References: <28A2725D-00F8-4739-8A73-ED176F8EF561@strayalpha.com> <3AA98081-A70E-4076-8096-79FFAEE8A738@huitema.net> <830b91c4-0bb5-af5b-f7b8-c5edd43dc87e@mtcc.com> <4512C1BF-5722-479B-8506-24018610BEAD@strayalpha.com> <5b4ea5ea-e2d6-1a01-3676-dd2a72dbd2c1@mtcc.com> <2C425F1E-2E12-4E47-ACEC-AF4C4A93FA3E@akamai.com> <140429ad-af8b-e03f-a641-1e78b6056fa4@mtcc.com> <D55AFBFD-0D59-4176-B6BD-D6A1801FEC2C@akamai.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <D55AFBFD-0D59-4176-B6BD-D6A1801FEC2C@akamai.com>
User-Agent: Mutt/1.12.1 (2019-06-15)
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf/NwqTUhbQ2PC9UT5Kmw0KHWL66xk>
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf/>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Jun 2020 02:46:56 -0000
On Sun, Jun 07, 2020 at 11:52:36PM +0000, Salz, Rich wrote: > > Because the TCP headers aren't part of the hmac digest? Am I missing > something? > > And how does that affect the application data? What corruption of TCP headers would not end up being noticed at the application layer and therefore TLS? A sometimes significant issue is that if TLS is the thing that notices the corruption, the stream shuts down and any recovery steps need to be done by the application. Some applications don't do this well, so their application data can be badly affected. But in general a well-designed application protocol should have a way to recover fairly gracefully, as has been noted a few times upthread. -Ben
- The TCP and UDP checksum algorithm may soon need … Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Joe Touch
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Richard Barnes
- Re: The TCP and UDP checksum algorithm may soon n… Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Brian E Carpenter
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Richard Barnes
- Re: The TCP and UDP checksum algorithm may soon n… Richard Barnes
- Re: The TCP and UDP checksum algorithm may soon n… Christian Huitema
- Re: The TCP and UDP checksum algorithm may soon n… Christian Huitema
- Re: The TCP and UDP checksum algorithm may soon n… Phillip Hallam-Baker
- Re: The TCP and UDP checksum algorithm may soon n… Joseph Touch
- Re: The TCP and UDP checksum algorithm may soon n… Stewart Bryant
- Re: The TCP and UDP checksum algorithm may soon n… Phillip Hallam-Baker
- Re: The TCP and UDP checksum algorithm may soon n… Joseph Touch
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Michael Richardson
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Masataka Ohta
- Re: The TCP and UDP checksum algorithm may soon n… John Levine
- Re: The TCP and UDP checksum algorithm may soon n… Phillip Hallam-Baker
- Re: The TCP and UDP checksum algorithm may soon n… Joseph Touch
- Re: The TCP and UDP checksum algorithm may soon n… Christian Huitema
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Joseph Touch
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Salz, Rich
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Salz, Rich
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Michael Richardson
- Re: The TCP and UDP checksum algorithm may soon n… Benjamin Kaduk
- Re: The TCP and UDP checksum algorithm may soon n… Nick Hilliard
- Re: The TCP and UDP checksum algorithm may soon n… Carsten Bormann
- Re: The TCP and UDP checksum algorithm may soon n… Nick Hilliard
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Joe Touch
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Nick Hilliard
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Nick Hilliard
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Carsten Bormann
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… John C Klensin
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Richard Barnes
- Re: The TCP and UDP checksum algorithm may soon n… Russ Housley
- Re: The TCP and UDP checksum algorithm may soon n… Brian E Carpenter
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Warren Kumari
- Re: The TCP and UDP checksum algorithm may soon n… John C Klensin
- Re: The TCP and UDP checksum algorithm may soon n… Christian Huitema
- Re: The TCP and UDP checksum algorithm may soon n… John C Klensin
- Re: The TCP and UDP checksum algorithm may soon n… Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Eric Rescorla
- Re: The TCP and UDP checksum algorithm may soon n… Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Nico Williams
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… John Levine
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas
- Re: The TCP and UDP checksum algorithm may soon n… Brian E Carpenter
- Re: The TCP and UDP checksum algorithm may soon n… Warren Kumari
- Re: The TCP and UDP checksum algorithm may soon n… John R Levine
- Re: The TCP and UDP checksum algorithm may soon n… tom petch
- Re: The TCP and UDP checksum algorithm may soon n… Salz, Rich
- Re: The TCP and UDP checksum algorithm may soon n… Carsten Bormann
- Re: The TCP and UDP checksum algorithm may soon n… Salz, Rich
- Re: The TCP and UDP checksum algorithm may soon n… Craig Partridge
- Re: The TCP and UDP checksum algorithm may soon n… Michael Thomas