IETF Logo Mail Archive

Re: [pkix] Why is the crlNumber an OCTET STRING?

Peter Gutmann <pgut001@cs.auckland.ac.nz> Wed, 21 April 2021 15:49 UTC

Return-Path: <pgut001@cs.auckland.ac.nz>
X-Original-To: pkix@ietfa.amsl.com
Delivered-To: pkix@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 232823A2D00 for <pkix@ietfa.amsl.com>; Wed, 21 Apr 2021 08:49:00 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.897
X-Spam-Level:
X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=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 Ee_QvSXcwMl3 for <pkix@ietfa.amsl.com>; Wed, 21 Apr 2021 08:48:55 -0700 (PDT)
Received: from au-smtp-delivery-117.mimecast.com (au-smtp-delivery-117.mimecast.com [180.189.28.117]) (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 252693A2CFF for <pkix@ietf.org>; Wed, 21 Apr 2021 08:48:54 -0700 (PDT)
Received: from AUS01-SY4-obe.outbound.protection.outlook.com (mail-sy4aus01lp2177.outbound.protection.outlook.com [104.47.71.177]) (Using TLS) by relay.mimecast.com with ESMTP id au-mta-17-KGc3eNhZNyOPW_0F_Q2N3Q-1; Thu, 22 Apr 2021 01:48:50 +1000
X-MC-Unique: KGc3eNhZNyOPW_0F_Q2N3Q-1
Received: from SG2PR03CA0130.apcprd03.prod.outlook.com (2603:1096:4:91::34) by SYAPR01MB3087.ausprd01.prod.outlook.com (2603:10c6:1:10::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4042.18; Wed, 21 Apr 2021 15:48:48 +0000
Received: from SG2APC01FT011.eop-APC01.prod.protection.outlook.com (2603:1096:4:91:cafe::c2) by SG2PR03CA0130.outlook.office365.com (2603:1096:4:91::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4087.16 via Frontend Transport; Wed, 21 Apr 2021 15:48:47 +0000
X-MS-Exchange-Authentication-Results: spf=none (sender IP is 130.216.95.224) smtp.mailfrom=cs.auckland.ac.nz; ietf.org; dkim=none (message not signed) header.d=none;ietf.org; dmarc=none action=none header.from=cs.auckland.ac.nz
Received: from uxcn13-ogg-b.UoA.auckland.ac.nz (130.216.95.224) by SG2APC01FT011.mail.protection.outlook.com (10.152.250.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.4065.21 via Frontend Transport; Wed, 21 Apr 2021 15:48:46 +0000
Received: from uxcn13-tdc-d.UoA.auckland.ac.nz (10.6.3.5) by uxcn13-ogg-b.UoA.auckland.ac.nz (10.6.2.3) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 22 Apr 2021 03:47:53 +1200
Received: from uxcn13-tdc-d.UoA.auckland.ac.nz ([fe80::e4e7:eb90:ab28:1bf5]) by uxcn13-tdc-d.UoA.auckland.ac.nz ([fe80::e4e7:eb90:ab28:1bf5%14]) with mapi id 15.00.1497.015; Thu, 22 Apr 2021 03:47:53 +1200
From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Russ Housley <housley@vigilsec.com>
CC: IETF PKIX <pkix@ietf.org>
Thread-Topic: [pkix] Why is the crlNumber an OCTET STRING?
Thread-Index: AQHXNisBKMOxCIvjxkGR+Ro1p9pc2aq9JmQAgADNMVL//zkzAIAAzrgj//9+3gCAAZbUkP//QLUAABmVk9k=
Date: Wed, 21 Apr 2021 15:47:53 +0000
Message-ID: <1619020072637.77385@cs.auckland.ac.nz>
References: <3d6d5a6ea9ca4a6a99791da46435b7cf@uxcn13-tdc-d.UoA.auckland.ac.nz> <490638C0-9D93-4998-9F5D-1C9804B8E95C@vigilsec.com> <1618955894307.55564@cs.auckland.ac.nz> <59C6BBA3-324C-4777-8A26-6E32B7D1946C@vigilsec.com> <1618957726686.74538@cs.auckland.ac.nz> <SYBPR01MB5616009D18496B7FD5CA38E1E5479@SYBPR01MB5616.ausprd01.prod.outlook.com> <1619018456026.55711@cs.auckland.ac.nz>, <E16F5376-2D0F-4B04-8734-FB16892DD448@vigilsec.com>
In-Reply-To: <E16F5376-2D0F-4B04-8734-FB16892DD448@vigilsec.com>
Accept-Language: en-NZ, en-GB, en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [130.216.158.4]
MIME-Version: 1.0
X-EOPAttributedMessage: 0
X-MS-PublicTrafficType: Email
X-MS-Office365-Filtering-Correlation-Id: 1fe20d78-097f-43d6-7506-08d904dcf2eb
X-MS-TrafficTypeDiagnostic: SYAPR01MB3087:
X-Microsoft-Antispam-PRVS: <SYAPR01MB308761A66333421699228F3CEE479@SYAPR01MB3087.ausprd01.prod.outlook.com>
X-MS-Oob-TLC-OOBClassifiers: OLM:8273
X-MS-Exchange-SenderADCheck: 1
X-Microsoft-Antispam: BCL:0
X-Microsoft-Antispam-Message-Info: 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
X-Forefront-Antispam-Report: CIP:130.216.95.224; CTRY:NZ; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:uxcn13-ogg-b.UoA.auckland.ac.nz; PTR:natgate2-1.auckland.ac.nz; CAT:NONE; SFS:(4636009)(39850400004)(136003)(396003)(376002)(346002)(46966006)(36840700001)(478600001)(2616005)(4744005)(2906002)(8676002)(186003)(7636003)(5660300002)(36860700001)(82310400003)(4326008)(70206006)(6916009)(82740400003)(36906005)(336012)(26005)(86362001)(786003)(356005)(316002)(83380400001)(70586007)(8936002)(47076005); DIR:OUT; SFP:1101
X-OriginatorOrg: cs.auckland.ac.nz
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Apr 2021 15:48:46.1490 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 1fe20d78-097f-43d6-7506-08d904dcf2eb
X-MS-Exchange-CrossTenant-Id: d1b36e95-0d50-42e9-958f-b63fa906beaa
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d1b36e95-0d50-42e9-958f-b63fa906beaa; Ip=[130.216.95.224]; Helo=[uxcn13-ogg-b.UoA.auckland.ac.nz]
X-MS-Exchange-CrossTenant-AuthSource: SG2APC01FT011.eop-APC01.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SYAPR01MB3087
X-Mimecast-Spam-Score: 0
X-Mimecast-Originator: cs.auckland.ac.nz
Content-Language: en-NZ
Content-Type: text/plain; charset="WINDOWS-1252"
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/pkix/2YO7vE_0uzFUFlvg__dkFWyehs4>
Subject: Re: [pkix] Why is the crlNumber an OCTET STRING?
X-BeenThere: pkix@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: PKIX Working Group <pkix.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/pkix>, <mailto:pkix-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/pkix/>
List-Post: <mailto:pkix@ietf.org>
List-Help: <mailto:pkix-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/pkix>, <mailto:pkix-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 21 Apr 2021 15:49:00 -0000

Russ Housley <housley@vigilsec.com> writes:

>The CRL number is helpful in any situation where the CRL issuer produces CRLs
>with different scopes.

How would the crlNumber help there?  And in particular, since thisUpdate is a
monotonically increasing sequence number, why is there a need for a second
parallel monotonically increasing sequence number?  It looks like an easy way
to implement crlNumber is:

  crlNumber := thisUpdate;

Which, in effect, is what the 8601-based implementation that's causing the
problem is doing, it's literally just copying the value of thisUpdate into
crlNumber.

Peter.

v2.23.0 | Report a Bug | By Email