linux-kernel - Re: [GIT PULL] Load keys from signed PE binaries

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Message-ID: <CAM0nabEQeezsg_KTX03-qVohXGX=8ZeW7ipFGn-e5_xfoTFXFw@mail.gmail.com>
Date:	Tue, 26 Feb 2013 10:45:27 -0600
From:	Kent Yoder <shpedoikal@...il.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Raymond Jennings <shentino@...il.com>,
	"Theodore Ts'o" <tytso@....edu>, Dave Airlie <airlied@...il.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	David Howells <dhowells@...hat.com>,
	Florian Weimer <fw@...eb.enyo.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Josh Boyer <jwboyer@...hat.com>,
	Peter Jones <pjones@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Kees Cook <keescook@...omium.org>, keyrings@...ux-nfs.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] Load keys from signed PE binaries

On Tue, Feb 26, 2013 at 4:21 AM, Matthew Garrett <mjg59@...f.ucam.org> wrote:
> On Tue, Feb 26, 2013 at 02:07:22AM -0800, Raymond Jennings wrote:
>> Just curious here, but is this as much of an issue if a user is
>> somehow able to take ownership of his own machine?
>
> No, if you're doing your own key management then it's no problem at
> all.
>
>> I'm assuming this is related to TPM somehow.
>
> No, completely unrelated.

  Almost completely.  As Matthew I'm sure knows, TPM is also used to
establish a chain of trust, but not using signed
firmware/kernel/modules, but chained hashes that are later signed
using the TPM.  It does avoid the issue of embedding keys from a
centralized authority in your box's firmware.

Kent

> --
> Matthew Garrett | mjg59@...f.ucam.org
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