From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> To: Andreas Fuchs <andreas.fuchs@sit.fraunhofer.de> Cc: James Bottomley <jejb@linux.vnet.ibm.com>, "linux-security-module@vger.kernel.org" <linux-security-module@vger.kernel.org>, "tpmdd-devel@lists.sourceforge.net" <tpmdd-devel@lists.sourceforge.net>, open list <linux-kernel@vger.kernel.org> Subject: Re: [tpmdd-devel] [PATCH RFC 0/4] RFC: in-kernel resource manager Date: Fri, 6 Jan 2017 12:10:49 -0700 [thread overview] Message-ID: <20170106191049.GA19576@obsidianresearch.com> (raw) In-Reply-To: <f5c8f4a2-d4ad-a2a0-9443-26589c58f9a7@sit.fraunhofer.de> On Fri, Jan 06, 2017 at 09:59:57AM +0100, Andreas Fuchs wrote: > 1. PolicyPCR is an essential feature of TPM used all over the place, > so we need support for policy sessions. > 2. PolicySigned allows authentication of the user via SmartCard. Are smart cards 0666 in linux? > The all-defeating reason for having in-kernel-RM is trusted keyrings > or IMA/EVM appraise/protect or similar. They will want to use sealing > to PCRs which in turn requires policy sessions from inside the kernel > and thus RM inside the kernel to play nicely with the TSS. Yes. I had hoped the in-kernel-RM could also provide safe 0666 access, but lets move on from that idea and focus on kernel/user TPM application co-existence... > And IMHO nobody wants the kernel security modules to call back to a > userspace RM-daemon. Yep. > If everyone agrees with this presumption the only question becomes > how to do this, such that we don't need a second RM in userspace > for the 99% of use cases. Yep. > P.S. This fact should also be given some thought when discussing the > priviledged 0600 node, i.e. /dev/tpm0 without the s in the middle. We are stuck with the non-RM interface for compat. There could be a kernel option/module option/sysctl/whatever of some kind to disable it I guess. Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> To: Andreas Fuchs <andreas.fuchs-iXjGqz/onsDSyEMIgutvibNAH6kLmebB@public.gmane.org> Cc: "linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org" <tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>, James Bottomley <jejb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>, open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org> Subject: Re: [PATCH RFC 0/4] RFC: in-kernel resource manager Date: Fri, 6 Jan 2017 12:10:49 -0700 [thread overview] Message-ID: <20170106191049.GA19576@obsidianresearch.com> (raw) In-Reply-To: <f5c8f4a2-d4ad-a2a0-9443-26589c58f9a7-iXjGqz/onsDSyEMIgutvibNAH6kLmebB@public.gmane.org> On Fri, Jan 06, 2017 at 09:59:57AM +0100, Andreas Fuchs wrote: > 1. PolicyPCR is an essential feature of TPM used all over the place, > so we need support for policy sessions. > 2. PolicySigned allows authentication of the user via SmartCard. Are smart cards 0666 in linux? > The all-defeating reason for having in-kernel-RM is trusted keyrings > or IMA/EVM appraise/protect or similar. They will want to use sealing > to PCRs which in turn requires policy sessions from inside the kernel > and thus RM inside the kernel to play nicely with the TSS. Yes. I had hoped the in-kernel-RM could also provide safe 0666 access, but lets move on from that idea and focus on kernel/user TPM application co-existence... > And IMHO nobody wants the kernel security modules to call back to a > userspace RM-daemon. Yep. > If everyone agrees with this presumption the only question becomes > how to do this, such that we don't need a second RM in userspace > for the 99% of use cases. Yep. > P.S. This fact should also be given some thought when discussing the > priviledged 0600 node, i.e. /dev/tpm0 without the s in the middle. We are stuck with the non-RM interface for compat. There could be a kernel option/module option/sysctl/whatever of some kind to disable it I guess. Jason ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot
next prev parent reply other threads:[~2017-01-06 19:11 UTC|newest] Thread overview: 150+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-01-02 13:22 [PATCH RFC 0/4] RFC: in-kernel resource manager Jarkko Sakkinen 2017-01-02 13:22 ` Jarkko Sakkinen 2017-01-02 13:22 ` [PATCH RFC 1/4] tpm: migrate struct tpm_buf to struct tpm_chip Jarkko Sakkinen 2017-01-02 13:22 ` Jarkko Sakkinen 2017-01-02 21:01 ` Jason Gunthorpe 2017-01-02 21:01 ` Jason Gunthorpe 2017-01-03 0:57 ` Jarkko Sakkinen 2017-01-03 19:13 ` Jason Gunthorpe 2017-01-03 19:13 ` Jason Gunthorpe 2017-01-04 12:29 ` Jarkko Sakkinen 2017-01-04 12:29 ` Jarkko Sakkinen 2017-01-02 13:22 ` [PATCH RFC 2/4] tpm: validate TPM 2.0 commands Jarkko Sakkinen 2017-01-02 13:22 ` Jarkko Sakkinen [not found] ` <20170102132213.22880-3-jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> 2017-01-04 18:04 ` Stefan Berger 2017-01-04 18:19 ` [tpmdd-devel] " James Bottomley 2017-01-04 18:19 ` James Bottomley [not found] ` <1483553976.2561.38.camel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> 2017-01-04 18:59 ` Stefan Berger [not found] ` <OF3FD1DF4F.FB87C3F2-ON0025809E.00682E9B-8525809E.00684A8A-8eTO7WVQ4XIsd+ienQ86orlN3bxYEBpz@public.gmane.org> 2017-01-04 19:05 ` James Bottomley [not found] ` <1483556735.2561.53.camel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> 2017-01-04 19:22 ` Stefan Berger [not found] ` <OFDFABBD23.E5E1F639-ON0025809E.006924C4-8525809E.006A7568-8eTO7WVQ4XIsd+ienQ86orlN3bxYEBpz@public.gmane.org> 2017-01-09 22:17 ` Jarkko Sakkinen [not found] ` <20170109221700.q7tq362rd6r23d5b-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> 2017-01-09 22:39 ` Stefan Berger 2017-01-04 18:44 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-04 18:44 ` Jason Gunthorpe 2017-01-02 13:22 ` [PATCH RFC 3/4] tpm: export tpm2_flush_context_cmd Jarkko Sakkinen 2017-01-02 13:22 ` Jarkko Sakkinen 2017-01-02 13:22 ` [PATCH RFC 4/4] tpm: add the infrastructure for TPM space for TPM 2.0 Jarkko Sakkinen 2017-01-02 13:22 ` Jarkko Sakkinen 2017-01-02 21:09 ` Jason Gunthorpe 2017-01-02 21:09 ` Jason Gunthorpe 2017-01-03 0:37 ` Jarkko Sakkinen 2017-01-03 18:46 ` Jason Gunthorpe 2017-01-03 18:46 ` Jason Gunthorpe 2017-01-04 12:43 ` Jarkko Sakkinen 2017-01-04 12:43 ` Jarkko Sakkinen 2017-01-03 19:16 ` Jason Gunthorpe 2017-01-03 19:16 ` Jason Gunthorpe 2017-01-04 12:45 ` Jarkko Sakkinen 2017-01-04 12:45 ` Jarkko Sakkinen [not found] ` <20170102132213.22880-5-jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> 2017-01-04 17:50 ` Stefan Berger 2017-01-09 22:11 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-02 16:36 ` [tpmdd-devel] [PATCH RFC 0/4] RFC: in-kernel resource manager James Bottomley 2017-01-02 19:33 ` Jarkko Sakkinen 2017-01-02 19:33 ` Jarkko Sakkinen 2017-01-02 21:40 ` [tpmdd-devel] " James Bottomley 2017-01-02 21:40 ` James Bottomley 2017-01-03 5:26 ` [tpmdd-devel] " James Bottomley 2017-01-03 13:41 ` Jarkko Sakkinen 2017-01-03 13:41 ` Jarkko Sakkinen 2017-01-03 16:14 ` [tpmdd-devel] " James Bottomley 2017-01-03 16:14 ` James Bottomley 2017-01-03 18:36 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-03 18:36 ` Jarkko Sakkinen 2017-01-03 19:14 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-03 19:14 ` Jarkko Sakkinen 2017-01-03 19:34 ` [tpmdd-devel] " James Bottomley 2017-01-03 19:34 ` James Bottomley 2017-01-03 21:54 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-03 21:54 ` Jason Gunthorpe 2017-01-04 12:58 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-04 12:58 ` Jarkko Sakkinen 2017-01-04 16:55 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-04 16:55 ` Jason Gunthorpe 2017-01-04 5:47 ` [tpmdd-devel] " Andy Lutomirski 2017-01-04 13:00 ` Jarkko Sakkinen 2017-01-03 13:51 ` Jarkko Sakkinen 2017-01-03 13:51 ` Jarkko Sakkinen 2017-01-03 16:36 ` [tpmdd-devel] " James Bottomley 2017-01-03 16:36 ` James Bottomley 2017-01-03 18:40 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-03 21:47 ` Jason Gunthorpe 2017-01-03 22:21 ` Ken Goldman 2017-01-03 22:21 ` Ken Goldman 2017-01-03 23:20 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-03 23:20 ` Jason Gunthorpe [not found] ` <20170103214702.GC29656-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> 2017-01-03 22:22 ` Ken Goldman 2017-01-03 22:39 ` [tpmdd-devel] " James Bottomley 2017-01-03 22:39 ` James Bottomley 2017-01-04 0:17 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-04 0:29 ` James Bottomley 2017-01-04 0:29 ` James Bottomley 2017-01-04 0:56 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-04 0:56 ` Jason Gunthorpe 2017-01-04 12:50 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-04 12:50 ` Jarkko Sakkinen 2017-01-04 14:53 ` [tpmdd-devel] " James Bottomley 2017-01-04 14:53 ` James Bottomley 2017-01-04 18:31 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-04 18:31 ` Jason Gunthorpe 2017-01-04 18:57 ` [tpmdd-devel] " James Bottomley 2017-01-04 18:57 ` James Bottomley 2017-01-04 19:24 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-04 19:24 ` Jason Gunthorpe [not found] ` <20170104001732.GB32185-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> 2017-01-10 18:55 ` Ken Goldman 2017-01-04 12:48 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-04 12:48 ` Jarkko Sakkinen [not found] ` <1483461370.2464.19.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org> 2017-01-03 22:18 ` Ken Goldman 2017-01-03 21:32 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-03 21:32 ` Jason Gunthorpe 2017-01-03 22:03 ` [tpmdd-devel] " James Bottomley 2017-01-05 15:52 ` Fuchs, Andreas 2017-01-05 15:52 ` Fuchs, Andreas 2017-01-05 17:27 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-05 17:27 ` Jason Gunthorpe 2017-01-05 18:06 ` [tpmdd-devel] " James Bottomley 2017-01-05 18:06 ` James Bottomley 2017-01-06 8:43 ` [tpmdd-devel] " Andreas Fuchs 2017-01-06 8:43 ` Andreas Fuchs [not found] ` <410e3045-58dc-5415-30c1-c86eb916b6c8-iXjGqz/onsDSyEMIgutvibNAH6kLmebB@public.gmane.org> 2017-01-10 18:57 ` Ken Goldman 2017-01-05 18:33 ` [tpmdd-devel] " James Bottomley 2017-01-05 18:33 ` James Bottomley 2017-01-05 19:20 ` Jason Gunthorpe 2017-01-05 19:20 ` Jason Gunthorpe 2017-01-05 19:55 ` [tpmdd-devel] " James Bottomley 2017-01-05 19:55 ` James Bottomley 2017-01-05 22:21 ` Jason Gunthorpe 2017-01-05 22:21 ` Jason Gunthorpe 2017-01-05 22:58 ` [tpmdd-devel] " James Bottomley 2017-01-05 22:58 ` James Bottomley 2017-01-05 23:50 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-05 23:50 ` Jason Gunthorpe 2017-01-06 0:36 ` [tpmdd-devel] " James Bottomley 2017-01-06 0:36 ` James Bottomley 2017-01-06 8:59 ` Andreas Fuchs 2017-01-06 8:59 ` Andreas Fuchs 2017-01-06 19:10 ` Jason Gunthorpe [this message] 2017-01-06 19:10 ` Jason Gunthorpe 2017-01-06 19:02 ` [tpmdd-devel] " Jason Gunthorpe 2017-01-06 19:02 ` Jason Gunthorpe 2017-01-10 19:03 ` Ken Goldman 2017-01-10 19:03 ` Ken Goldman 2017-01-09 22:39 ` [tpmdd-devel] " Jarkko Sakkinen 2017-01-09 22:39 ` Jarkko Sakkinen 2017-01-11 10:03 ` Andreas Fuchs 2017-01-11 10:03 ` Andreas Fuchs 2017-01-04 16:12 Dr. Greg Wettstein 2017-01-04 16:12 ` Dr. Greg Wettstein 2017-01-09 23:16 ` Jarkko Sakkinen 2017-01-10 19:29 ` Ken Goldman 2017-01-10 19:29 ` Ken Goldman 2017-01-11 11:36 ` Jarkko Sakkinen 2017-01-10 20:05 ` Jason Gunthorpe 2017-01-11 10:00 ` Andreas Fuchs 2017-01-11 18:03 ` Jason Gunthorpe 2017-01-11 18:27 ` Stefan Berger 2017-01-11 19:18 ` Jason Gunthorpe 2017-01-11 11:34 ` Jarkko Sakkinen 2017-01-11 15:39 ` James Bottomley 2017-01-11 17:56 ` Jason Gunthorpe 2017-01-11 18:25 ` James Bottomley 2017-01-11 19:04 ` Jason Gunthorpe
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