linux-kernel - Re: [PATCH 4/6] kexec: A new system call, kexec_file

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Message-ID: <20131121191907.GA26366@srcf.ucam.org>
Date:	Thu, 21 Nov 2013 19:19:07 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org, ebiederm@...ssion.com, hpa@...or.com,
	Peter Jones <pjones@...hat.com>
Subject: Re: [PATCH 4/6] kexec: A new system call, kexec_file_load, for in
 kernel kexec

On Thu, Nov 21, 2013 at 02:13:05PM -0500, Vivek Goyal wrote:
> On Thu, Nov 21, 2013 at 07:06:20PM +0000, Matthew Garrett wrote:
> > That would require a certain degree of massaging from userspace if we 
> > want to be able to use the existing Authenticode signatures. Otherwise 
> > we need to sign kernels twice.
> 
> I was thinking oof signing the same kernel twice. Can I sign authenticode
> signed kernel again (using RSA signature as we do for modules) and append
> the signature to bzImage. 

No, you'd need to do it the other way around.

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