Re: [secdir] Reuse of credentials per realm, was: SECDIR review of draft-ietf-httpbis-p7-auth-24

Stephen Kent <kent@bbn.com> Wed, 30 October 2013 16:52 UTC

Return-Path: <kent@bbn.com>
X-Original-To: secdir@ietfa.amsl.com
Delivered-To: secdir@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DAC6B21F9CAD for <secdir@ietfa.amsl.com>; Wed, 30 Oct 2013 09:52:20 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -106.521
X-Spam-Level:
X-Spam-Status: No, score=-106.521 tagged_above=-999 required=5 tests=[AWL=0.078, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HFxXMTsgSKqy for <secdir@ietfa.amsl.com>; Wed, 30 Oct 2013 09:52:15 -0700 (PDT)
Received: from smtp.bbn.com (smtp.bbn.com [128.33.1.81]) by ietfa.amsl.com (Postfix) with ESMTP id EF06611E819D for <secdir@ietf.org>; Wed, 30 Oct 2013 09:52:06 -0700 (PDT)
Received: from dhcp89-089-218.bbn.com ([128.89.89.218]:52573) by smtp.bbn.com with esmtp (Exim 4.77 (FreeBSD)) (envelope-from <kent@bbn.com>) id 1VbYzj-00065h-0g; Wed, 30 Oct 2013 12:51:47 -0400
Message-ID: <52713922.2020803@bbn.com>
Date: Wed, 30 Oct 2013 12:51:46 -0400
From: Stephen Kent <kent@bbn.com>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:24.0) Gecko/20100101 Thunderbird/24.1.0
MIME-Version: 1.0
To: Julian Reschke <julian.reschke@gmx.de>, secdir <secdir@ietf.org>, fielding@gbiv.com, mnot@pobox.com, Barry Leiba <barryleiba@computer.org>, Pete Resnick <presnick@qti.qualcomm.com>, "Mankin, Allison" <amankin@verisign.com>, HTTP Working Group <ietf-http-wg@w3.org>
References: <52700DE4.8020208@bbn.com> <527132E3.3000001@gmx.de>
In-Reply-To: <527132E3.3000001@gmx.de>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit
Subject: Re: [secdir] Reuse of credentials per realm, was: SECDIR review of draft-ietf-httpbis-p7-auth-24
X-BeenThere: secdir@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Security Area Directorate <secdir.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/secdir>, <mailto:secdir-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/secdir>
List-Post: <mailto:secdir@ietf.org>
List-Help: <mailto:secdir-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/secdir>, <mailto:secdir-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 30 Oct 2013 16:52:44 -0000

Julian,

Since, as you note, the server ultimately accepts or rejects the 
credentials,
it was not clear under what circumstances "user preferences" are a valid 
factor
in deciding when to stop using the same set of credentials. If you could 
elaborate
that would be useful.

Steve
> On 2013-10-29 20:35, Stephen Kent wrote:
>> ...
>> In Section 2.2 the text says:
>>
>> The protection space determines the domain over which credentials can
>>
>> be automatically applied.If a prior request has been authorized,
>>
>> the user agent MAY reuse the same credentials for all other requests
>>
>> within that protection space for a period of time determined by the
>>
>> authentication scheme, parameters, and/or user preference.
>>
>> I’m not clear how user preferences fit into this process. It would seem
>> that the server would decide whether a prior authorization is valid for
>> later requests, not a user.
>> ...
>
> Of course it's up to the server to accept or reject it. The text you 
> cite is about the user agent deciding whether it can try to use the 
> credentials.
>
> Does this require a clarification?
>
> Best regards, Julian
>