Re: [kitten] draft-perez-krb-wg-gss-preauth

Greg Hudson <ghudson@mit.edu> Wed, 04 August 2021 17:11 UTC

Return-Path: <ghudson@mit.edu>
X-Original-To: kitten@ietfa.amsl.com
Delivered-To: kitten@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B73BA3A0BFF for <kitten@ietfa.amsl.com>; Wed, 4 Aug 2021 10:11:10 -0700 (PDT)
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, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=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 Kbpb32Fw2eDR for <kitten@ietfa.amsl.com>; Wed, 4 Aug 2021 10:11:08 -0700 (PDT)
Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (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 D63383A0C02 for <kitten@ietf.org>; Wed, 4 Aug 2021 10:11:07 -0700 (PDT)
Received: from [18.28.8.87] ([18.28.8.87]) (authenticated bits=0) (User authenticated as ghudson@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 174HB3WY007684 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 4 Aug 2021 13:11:05 -0400
To: Luke Howard <lukeh@padl.com>
Cc: "kitten@ietf.org" <kitten@ietf.org>, Alejandro Perez Mendez <alex@um.es>
References: <919B7645-005D-417B-AF1E-EDF165E94BAC@padl.com> <24346b50-09d5-f4b6-f5fe-7790809a7fe7@mit.edu> <6DAAE721-CD5F-4271-A18A-1719254A972E@padl.com> <DEDFD3FE-C17A-417B-B1C0-B19F68F00DC9@padl.com>
From: Greg Hudson <ghudson@mit.edu>
Message-ID: <4c2fa532-5d99-a5ac-794f-7046fd0a9844@mit.edu>
Date: Wed, 4 Aug 2021 13:11:03 -0400
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1
MIME-Version: 1.0
In-Reply-To: <DEDFD3FE-C17A-417B-B1C0-B19F68F00DC9@padl.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/kitten/iJUCJo33O2A8JNLecmxxBQ_Me3Q>
Subject: Re: [kitten] draft-perez-krb-wg-gss-preauth
X-BeenThere: kitten@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Common Authentication Technologies - Next Generation <kitten.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/kitten>, <mailto:kitten-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/kitten/>
List-Post: <mailto:kitten@ietf.org>
List-Help: <mailto:kitten-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/kitten>, <mailto:kitten-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 04 Aug 2021 17:11:11 -0000

On 8/4/21 7:43 AM, Luke Howard wrote:
> Greg, If we make FAST a hard requirement, would you suggest dropping the PA-GSS type and encoding the context token directly?

Note that FAST armor is not required to use the cookie.  SPAKE preauth
requires PA-FX-COOKIE support but not FAST armor.

I have no opinion on whether to encode the context token directly or
give it an ASN.1 wrapper.