Re: [TLS] draft-rhrd (Was: Re: Update on TLS 1.3 Middlebox Issues)

Stephen Farrell <stephen.farrell@cs.tcd.ie> Mon, 09 October 2017 17:33 UTC

Return-Path: <stephen.farrell@cs.tcd.ie>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 33391134725 for <tls@ietfa.amsl.com>; Mon, 9 Oct 2017 10:33:15 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.301
X-Spam-Level:
X-Spam-Status: No, score=-4.301 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cs.tcd.ie
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 F9xqrSp1mLJq for <tls@ietfa.amsl.com>; Mon, 9 Oct 2017 10:33:12 -0700 (PDT)
Received: from mercury.scss.tcd.ie (mercury.scss.tcd.ie [134.226.56.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AC2CB13471C for <tls@ietf.org>; Mon, 9 Oct 2017 10:33:12 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by mercury.scss.tcd.ie (Postfix) with ESMTP id EC16BBE53; Mon, 9 Oct 2017 18:33:10 +0100 (IST)
Received: from mercury.scss.tcd.ie ([127.0.0.1]) by localhost (mercury.scss.tcd.ie [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id juJfM_P71gGb; Mon, 9 Oct 2017 18:33:10 +0100 (IST)
Received: from [134.226.36.93] (bilbo.dsg.cs.tcd.ie [134.226.36.93]) by mercury.scss.tcd.ie (Postfix) with ESMTPSA id AC53BBE50; Mon, 9 Oct 2017 18:33:10 +0100 (IST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cs.tcd.ie; s=mail; t=1507570390; bh=KGeXEmqB6tJKymLot3YOMzBY9Gdb/lCmo+jcf/dU3u0=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=eT1QHhrSUKAunlSKMTJacabPmgit1MtFoaZPmpTvJnNL9SIC3Ko472GWK3/c5/fcf KVemYNciZ2JKiytAXFXSM09QCR3qoRmE9smo9ianDRl/PS/mMC4aOYl5Pol4IoSrW4 n0SbLaY2ESbMS5V4sdf/LO7ophzSUaa+/7cch+tA=
To: "Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu>
Cc: Eric Rescorla <ekr@rtfm.com>, Randy Bush <randy@psg.com>, Transport Layer Surveillance WG <tls@ietf.org>
References: <m2shetiafc.wl-randy@psg.com> <CABcZeBPA885itU+O-X+ri_P7Zxqbs1qXUmQFbE9Fc3h5YQfSMw@mail.gmail.com> <1854f9e7-7264-bd1a-9ae4-0407b682b731@cs.tcd.ie> <C679B34E-613F-4C2B-AF5E-9C08FD344DB2@ll.mit.edu>
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Openpgp: id=D66EA7906F0B897FB2E97D582F3C8736805F8DA2; url=
Message-ID: <57bda69d-f54e-9fd3-ae2c-72cf06409730@cs.tcd.ie>
Date: Mon, 09 Oct 2017 18:33:10 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0
MIME-Version: 1.0
In-Reply-To: <C679B34E-613F-4C2B-AF5E-9C08FD344DB2@ll.mit.edu>
Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="CdGbax250Hdoj9t5xFXor0dSqlHvxvVKw"
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/S3vKBIgTMt5Qz0MxoqOPbbUko4Y>
Subject: Re: [TLS] draft-rhrd (Was: Re: Update on TLS 1.3 Middlebox Issues)
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tls/>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 09 Oct 2017 17:33:15 -0000

I did a bit of an update to [1].

As before PRs are welcome and I (still) wonder if the
WG would benefit from documenting bits of this stuff
as a work item to save time and repetition in future.

S.

[1] https://github.com/sftcd/tinfoil

On 08/10/17 23:35, Blumenthal, Uri - 0553 - MITLL wrote:
> +1 to Stephen.
> 
> Regards,
> Uri
> 
> Sent from my iPhone
> 
>> On Oct 8, 2017, at 18:34, Stephen Farrell <stephen.farrell@cs.tcd.ie> wrote:
>>
>>
>>
>>> On 08/10/17 23:22, Eric Rescorla wrote:
>>> You seem to be responding to some other thread. 
>>
>> Yep. I changed the subject line.
>>
>> Randy's substantive message however is crystal clear. And is
>> one that WG participants ought take to heart IMO. Pretending
>> that some changes to TLS would magically be limited in scope
>> to so-called "data centres" is BS. I'm really really puzzled
>> that some otherwise sensible folks appear unable to see that.
>>
>> S
>>
>>
>>> As both Adam Langley and I
>>> mentioned, none of the changes that anyone is investigating for reducing
>>> middlebox-induced breakage affect the cryptographic properties of TLS.
>>>
>>> -Ekr
>>>
>>>
>>>> On Sun, Oct 8, 2017 at 2:42 PM, Randy Bush <randy@psg.com> wrote:
>>>>
>>>> there are a lot of us lurkers out here a bit horrified watching this wg
>>>> go off the rails.
>>>>
>>>> it would help if vendors of devices which break privacy would stop
>>>> speaking for 'datacenters' and let datacenters speak for themselves.  i
>>>> have not seen any doing so.  my $dayjob has >10 medium sized datacenters
>>>> serving everything from banks to telcos to scaled cloud services.  i can
>>>> not find folk in our datacenter groups who see a need to break e2e
>>>> encryption.
>>>>
>>>> if the interception proposals ensured that user is notified and able to
>>>> prevent session interception, then i would believe this.  but if they do
>>>> not, then let's face it, this is all about selling surveillance gear to
>>>> snooping enterprises and repressive regiemes where people with guns take
>>>> you away at 3am because your session was decoded.
>>>>
>>>> can we please provide real end to end privacy or call this wg something
>>>> else?
>>>>
>>>> randy
>>>>
>>>> _______________________________________________
>>>> TLS mailing list
>>>> TLS@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/tls
>>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> TLS mailing list
>>> TLS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/tls
>>>
>>
>> _______________________________________________
>> TLS mailing list
>> TLS@ietf.org
>> https://www.ietf.org/mailman/listinfo/tls
>