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From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: linux-efi@vger.kernel.org, linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86/efi: pull NV+BS variables out before we exit boot services
Date: Tue, 19 Mar 2013 17:17:27 +0000	[thread overview]
Message-ID: <1363713447.2377.60.camel@dabdike.int.hansenpartnership.com> (raw)
In-Reply-To: <20130319163531.GA10879@srcf.ucam.org>

On Tue, 2013-03-19 at 16:35 +0000, Matthew Garrett wrote:
> On Tue, Mar 19, 2013 at 08:14:45AM +0000, James Bottomley wrote:
> 
> > Any security assumptions that rely on inability to read certain
> > information aren't really going to be that secure.  Inability to modify,
> > sure, but inability to read, not really.
> 
> Well, I guess that's public/private key cryptography screwed.

Well, OK, it's ex-BIOS writers we're dealing with, so I won't say no-one
would be stupid enough to come up with a security scheme embedding
Private Keys in BS+NV variables, but I would have thought the fact that
Linux would blow the lid off it might be a good incentive not to do it
and thus a plus point for this patch.

James



  reply	other threads:[~2013-03-19 17:17 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-18  8:40 [PATCH] x86/efi: pull NV+BS variables out before we exit boot services James Bottomley
2013-03-18  8:40 ` James Bottomley
2013-03-19  1:48 ` Matthew Garrett
2013-03-19  1:48   ` Matthew Garrett
2013-03-19  8:14   ` James Bottomley
2013-03-19  8:14     ` James Bottomley
2013-03-19 16:35     ` Matthew Garrett
2013-03-19 16:35       ` Matthew Garrett
2013-03-19 17:17       ` James Bottomley [this message]
2013-03-19 17:25         ` Matthew Garrett
2013-03-19 17:25           ` Matthew Garrett
2013-03-19 18:23           ` James Bottomley
2013-03-19 18:23             ` James Bottomley
2013-03-19 18:28             ` Matthew Garrett
2013-03-19 18:28               ` Matthew Garrett
2013-03-19 18:40               ` James Bottomley
2013-03-19 18:40                 ` James Bottomley
2013-03-19 18:50                 ` Matthew Garrett
2013-03-19 18:50                   ` Matthew Garrett
2013-03-19 23:00                   ` James Bottomley
2013-03-19 23:00                     ` James Bottomley
2013-03-19 23:17                     ` Matthew Garrett
2013-03-19 23:17                       ` Matthew Garrett
2013-03-20  8:00                       ` James Bottomley
2013-03-20  8:00                         ` James Bottomley
2013-03-20 11:47                         ` Matthew Garrett
2013-03-20 11:47                           ` Matthew Garrett
2013-03-20 11:26 ` Matt Fleming
2013-03-20 11:26   ` Matt Fleming

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