Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx1.redhat.com ([209.132.183.28]:45815 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755554Ab3KVTLm (ORCPT ); Fri, 22 Nov 2013 14:11:42 -0500 Subject: Re: [PATCH Version 2 0/3] GSSD: Use gss-ctx keys and gsskeyd to sync Kerberos credentials and kernel gss_contexts. From: Simo Sorce To: Steve Dickson Cc: "Adamson, Andy" , "" In-Reply-To: <528E0C8A.9070608@RedHat.com> References: <1382451757-3032-1-git-send-email-andros@netapp.com> <1382454148.9794.72.camel@willson.li.ssimo.org> <1382458162.9794.85.camel@willson.li.ssimo.org> <9C15298B-8915-46E2-85E1-5098F1A12832@netapp.com> <1382462720.9794.131.camel@willson.li.ssimo.org> <096F13FC-A99E-4C19-ACCA-01C244D7420F@netapp.com> <1384980587.17044.49.camel@willson.li.ssimo.org> <528E0C8A.9070608@RedHat.com> Content-Type: text/plain; charset="UTF-8" Date: Fri, 22 Nov 2013 14:11:40 -0500 Message-ID: <1385147500.3912.68.camel@willson.li.ssimo.org> Mime-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: On Thu, 2013-11-21 at 08:37 -0500, Steve Dickson wrote: > > On 20/11/13 15:49, Simo Sorce wrote: > >> I think Solution 3: [nfslog/nfslogout interfaces invoked from PAM or > >> > other login system facility] is a good way to go. Note that a PAM > >> > based solution where in the PAM would get us most of the way towards > >> > providing users with a way to login and logout of NFS kerberized > >> > shares. > >> > > >> > Comments on an NFS PAM that will destroy GSS context for a UID upon > >> > logout? > > I prefer 3 too, let it to the login system (whether PAM based or other) > > to determine when it is time to destroy credentials, that's the only > > component that have a chance of guessing right. > > Of course you could also provide a user utility to force a purge. > > > +1 for me on this options as well... > > But how is it known when somebody logs out? Is that PAM-able as well? I would say "login process" more than pam, but the basic idea is the same, a user space program that knows when the user is logging out for good and is privileged enough to go an tell the kernel to nuke creds. Simo. -- Simo Sorce * Red Hat, Inc * New York