Re: [ietf-dkim] versions, Where is the formal definition of DKIM-Signature?

"John R. Levine" <johnl@iecc.com> Thu, 08 February 2018 17:47 UTC

Return-Path: <ietf-dkim-bounces@mipassoc.org>
X-Original-To: ietfarch-ietf-dkim-archive@ietfa.amsl.com
Delivered-To: ietfarch-ietf-dkim-archive@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4EB1812DA14 for <ietfarch-ietf-dkim-archive@ietfa.amsl.com>; Thu, 8 Feb 2018 09:47:42 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.789
X-Spam-Level:
X-Spam-Status: No, score=-1.789 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, T_DKIM_INVALID=0.01, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=fail (1536-bit key) reason="fail (message has been altered)" header.d=iecc.com
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 5U67G6HAga_8 for <ietfarch-ietf-dkim-archive@ietfa.amsl.com>; Thu, 8 Feb 2018 09:47:41 -0800 (PST)
Received: from simon.songbird.com (simon.songbird.com [72.52.113.5]) (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 0E1C0127078 for <ietf-dkim-archive@ietf.org>; Thu, 8 Feb 2018 09:47:41 -0800 (PST)
Received: from simon.songbird.com (simon.songbird.com [127.0.0.1]) by simon.songbird.com (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id w18HkiiZ005936; Thu, 8 Feb 2018 09:46:45 -0800
Authentication-Results: simon.songbird.com; dkim=fail reason="verification failed; unprotected key" header.d=iecc.com header.i=@iecc.com header.b=AzGzEkSR; dkim-adsp=none (unprotected policy); dkim-atps=neutral
Received: from gal.iecc.com (gal.iecc.com [64.57.183.53]) by simon.songbird.com (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id w18Hkfdf005922 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for <ietf-dkim@mipassoc.org>; Thu, 8 Feb 2018 09:46:42 -0800
Received: (qmail 19476 invoked from network); 8 Feb 2018 17:45:44 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=iecc.com; h=date:message-id:from:to:cc:subject:in-reply-to:references:mime-version:content-type:user-agent; s=4c12.5a7c8cc8.k1802; bh=+FGWosJvuMt9mLVenhFWPsCpOAHk8fA2aMdrvai0OmU=; b=AzGzEkSRRCfmrFgTSOZHjSkpoRibMlHQaZJtnZb6KjY9OUbIlSHUK9r2bZOds4wIhlvKTDnL61tHO19RHg54iVamqj8gzQ34QiNxDyPSJx3667i7oi7RN3EuvcY3Nn7mRaUX7OBkyocipAHJdIDszc5gVnf+1zfX/PPsraX4Aphz10w4zM+jIO87uKydK9oK4rXAp4TCQ5OPrA4AY90XUHsUiFylMXkP8x9gDDlcxIhAYBon0LIn/0iESL/m6huW
Received: from localhost ([IPv6:2001:470:1f07:1126::78:696d:6170]) by imap.iecc.com ([IPv6:2001:470:1f07:1126::78:696d:6170]) with ESMTPS (TLS1.2/X.509/AEAD) via TCP6; 08 Feb 2018 17:45:44 -0000
Date: Thu, 08 Feb 2018 12:45:43 -0500
Message-ID: <alpine.OSX.2.21.1802081244280.52386@ary.qy>
From: "John R. Levine" <johnl@iecc.com>
To: Dave Crocker <dcrocker@bbiw.net>
In-Reply-To: <87ca121d-19c3-ed75-3de0-5ee5938377cd@bbiw.net>
References: <9e7d6a29-cbef-e032-4af9-eb5395071b4d@tana.it> <alpine.OSX.2.21.1802080808160.51311@ary.qy> <CAL0qLwYZPRdrg-J5KMreS==SUcnAU1pZXwgFURs5T3=XaX4HOg@mail.gmail.com> <20180208161754.25028.qmail@f3-external.bushwire.net> <alpine.OSX.2.21.1802081148580.52386@ary.qy> <8269e2b7-0f10-95f6-a3c1-d320ac4749d0@bbiw.net> <alpine.OSX.2.21.1802081207120.52386@ary.qy> <87ca121d-19c3-ed75-3de0-5ee5938377cd@bbiw.net>
User-Agent: Alpine 2.21 (OSX 202 2017-01-01)
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="0-675969216-1518111944=:52386"
Cc: ietf-dkim@mipassoc.org
Subject: Re: [ietf-dkim] versions, Where is the formal definition of DKIM-Signature?
X-BeenThere: ietf-dkim@mipassoc.org
X-Mailman-Version: 2.1.16
Precedence: list
List-Id: IETF DKIM Discussion List <ietf-dkim.mipassoc.org>
List-Unsubscribe: <http://mipassoc.org/mailman/options/ietf-dkim>, <mailto:ietf-dkim-request@mipassoc.org?subject=unsubscribe>
List-Archive: <http://mipassoc.org/pipermail/ietf-dkim/>
List-Post: <mailto:ietf-dkim@mipassoc.org>
List-Help: <mailto:ietf-dkim-request@mipassoc.org?subject=help>
List-Subscribe: <http://mipassoc.org/mailman/listinfo/ietf-dkim>, <mailto:ietf-dkim-request@mipassoc.org?subject=subscribe>
Errors-To: ietf-dkim-bounces@mipassoc.org
Sender: ietf-dkim <ietf-dkim-bounces@mipassoc.org>

>>  the DKIM library.  If it passes a v=2 signature to a library that only
>>  knows about v=1, the library will say it's invalid, which isn't ideal but
>>  isn't wrong.
>
> the code that tests for the v= parameter could, just as easily, check for the 
> presence of the new features.

Huh?  v=1 code doesn't know what the new features would be.

Regards,
John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly
_______________________________________________
NOTE WELL: This list operates according to
http://mipassoc.org/dkim/ietf-list-rules.html