IETF Logo Mail Archive

Re: [openpgp] respecting key flags for decryption

Peter Gutmann <pgut001@cs.auckland.ac.nz> Thu, 08 November 2018 22:31 UTC

Return-Path: <pgut001@cs.auckland.ac.nz>
X-Original-To: openpgp@ietfa.amsl.com
Delivered-To: openpgp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B9B9D130DF9 for <openpgp@ietfa.amsl.com>; Thu, 8 Nov 2018 14:31:54 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.199
X-Spam-Level:
X-Spam-Status: No, score=-4.199 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_MED=-2.3, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=auckland.ac.nz
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 VZn_d3J6iza4 for <openpgp@ietfa.amsl.com>; Thu, 8 Nov 2018 14:31:53 -0800 (PST)
Received: from mx4-int.auckland.ac.nz (mx4-int.auckland.ac.nz [130.216.125.246]) (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 BF0D3130EC0 for <openpgp@ietf.org>; Thu, 8 Nov 2018 14:31:52 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=auckland.ac.nz; i=@auckland.ac.nz; q=dns/txt; s=mail; t=1541716312; x=1573252312; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=XzoVFMGla0+SwUNHV0KiGd4q7CbhS92A8bX/1q0woPU=; b=X3zMz1HalE+y6oiYQ4QtLCACKLTEQxbCLuIdza3bUl10sXGM9LVMO+PU 3WIdGcy3KreP/3MCVfuObL5iBubK39LtjcdWMJ4PRNQv/f9eU8SzP4IjX z1rUFGjyKYteFE2i4nuTwDyUjwWV2vzlqpsFjb6yscBsMBS3aHykFBpRx MKXBNxz+6S49CC+rD2LQmpqPTwPug9h5mRZaDgtvvvigJyf1wE44qD7o2 iIyP9s5g3qSuvbswR9DOVudvZao+RWZdHH1MP87S7LojCwpDi/pO39FFM Ungg/yEqevvBiqwVlpO9UUxktUw2FVHtduen1QsYoyTi4kROnAmaU/zwj Q==;
X-IronPort-AV: E=Sophos;i="5.54,481,1534766400"; d="scan'208";a="38857997"
X-Ironport-HAT: MAIL-SERVERS - $RELAYED
X-Ironport-Source: 10.6.2.3 - Outgoing - Outgoing
Received: from exchangemx.uoa.auckland.ac.nz (HELO uxcn13-ogg-b.UoA.auckland.ac.nz) ([10.6.2.3]) by mx4-int.auckland.ac.nz with ESMTP/TLS/AES256-SHA; 09 Nov 2018 11:31:51 +1300
Received: from uxcn13-ogg-d.UoA.auckland.ac.nz (10.6.2.5) by uxcn13-ogg-b.UoA.auckland.ac.nz (10.6.2.3) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 9 Nov 2018 11:31:50 +1300
Received: from uxcn13-ogg-d.UoA.auckland.ac.nz ([10.6.2.5]) by uxcn13-ogg-d.UoA.auckland.ac.nz ([10.6.2.5]) with mapi id 15.00.1395.000; Fri, 9 Nov 2018 11:31:50 +1300
From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Vincent Breitmoser <look@my.amazin.horse>, Jon Callas <joncallas@icloud.com>
CC: "openpgp@ietf.org" <openpgp@ietf.org>
Thread-Topic: [openpgp] respecting key flags for decryption
Thread-Index: AQHUdq6nvTjqM1Dj2EWug5wDrVC4uKVEBl6AgADdrgCAAZQk6A==
Date: Thu, 08 Nov 2018 22:31:50 +0000
Message-ID: <1541716302530.66616@cs.auckland.ac.nz>
References: <75BF6022-6C87-45A7-9FE9-678EA022C39A@icloud.com> <F6G9P4PUTM.2GANNJVZZYB8G@my.amazin.horse>, <F6H5ZXC03G.2SFRGQ14E5LZK@my.amazin.horse>
In-Reply-To: <F6H5ZXC03G.2SFRGQ14E5LZK@my.amazin.horse>
Accept-Language: en-NZ, en-GB, en-US
Content-Language: en-NZ
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [130.216.158.4]
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Archived-At: <https://mailarchive.ietf.org/arch/msg/openpgp/TaRK0t5pF7__DI_ziMy3ZwRaSk8>
Subject: Re: [openpgp] respecting key flags for decryption
X-BeenThere: openpgp@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Ongoing discussion of OpenPGP issues." <openpgp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/openpgp>, <mailto:openpgp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/openpgp/>
List-Post: <mailto:openpgp@ietf.org>
List-Help: <mailto:openpgp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/openpgp>, <mailto:openpgp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 08 Nov 2018 22:31:55 -0000

Vincent Breitmoser <look@my.amazin.horse> writes:

>The reason this happened, I strongly suspect, is exactly because they treated
>GnuPG as a reference implementation: they tested that it worked against GnuPG
>(or some frontend), found it worked in practice (without even a warning), and
>then left it at that.

This is a problem with several protocols where there's a single widely-used
implementation.  It also affects SSH, a standards-conformant implementation
isn't something that follows RFC 4251-4, it's something that you can connect
to with Putty (server) or that connects to OpenSSH (client).  That really is
the conformance-test for SSH, "we can connect to it with Putty, it's now
complete and fully standards-compliant".

Maybe all of these unofficial reference implementations need a strict-checking
mode for when they're being (incorrectly) used as reference implementations...

Peter.

v2.23.0 | Report a Bug | By Email