[Ace] Overwriting Tokens

Stefanie Gerdes <gerdes@tzi.de> Wed, 12 December 2018 09:33 UTC

Return-Path: <gerdes@tzi.de>
X-Original-To: ace@ietfa.amsl.com
Delivered-To: ace@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A2446131149 for <ace@ietfa.amsl.com>; Wed, 12 Dec 2018 01:33:52 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.2
X-Spam-Level:
X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3] 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 sOD7PhekL85W for <ace@ietfa.amsl.com>; Wed, 12 Dec 2018 01:33:51 -0800 (PST)
Received: from smtp.uni-bremen.de (gabriel-vm-2.zfn.uni-bremen.de [134.102.50.17]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D0780131148 for <ace@ietf.org>; Wed, 12 Dec 2018 01:33:50 -0800 (PST)
Received: from [192.168.1.109] (p508A4EFC.dip0.t-ipconnect.de [80.138.78.252]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.uni-bremen.de (Postfix) with ESMTPSA id 49D0E20363; Wed, 12 Dec 2018 10:33:49 +0100 (CET)
From: Stefanie Gerdes <gerdes@tzi.de>
To: Ludwig Seitz <ludwig.seitz@ri.se>, "ace@ietf.org" <ace@ietf.org>
References: <154322421294.8323.8505315870685563404.idtracker@ietfa.amsl.com> <cbd083d1-cb95-0732-aa8b-7c7de3f480d1@ri.se> <a0cdd836-7fe3-339e-0c48-961503857447@tzi.de>
Message-ID: <043bc23f-f566-55d0-7c94-200d72b98341@tzi.de>
Date: Wed, 12 Dec 2018 10:33:48 +0100
User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0
MIME-Version: 1.0
In-Reply-To: <a0cdd836-7fe3-339e-0c48-961503857447@tzi.de>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/x9JFbn0a6CRdsIwmQdKReGu5q1E>
Subject: [Ace] Overwriting Tokens
X-BeenThere: ace@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Authentication and Authorization for Constrained Environments \(ace\)" <ace.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ace>, <mailto:ace-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ace/>
List-Post: <mailto:ace@ietf.org>
List-Help: <mailto:ace-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ace>, <mailto:ace-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 12 Dec 2018 09:33:53 -0000

Hi again,

I have one additional comment to ace-oauth-17:

Section 5.8.1 recommends that RS stores only one token per key and that
existing tokens are overwritten by new tokens. I wonder how the RS knows
which token is the most recent. I don't think the expiration time helps
in this case because it should be possible for the AS to
provide a token that expires earlier than the previous token.


Viele Grüße
Steffi