From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755059Ab3KUTTM (ORCPT ); Thu, 21 Nov 2013 14:19:12 -0500 Received: from cavan.codon.org.uk ([93.93.128.6]:35692 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751971Ab3KUTTL (ORCPT ); Thu, 21 Nov 2013 14:19:11 -0500 Date: Thu, 21 Nov 2013 19:19:07 +0000 From: Matthew Garrett To: Vivek Goyal Cc: Greg KH , linux-kernel@vger.kernel.org, kexec@lists.infradead.org, ebiederm@xmission.com, hpa@zytor.com, Peter Jones Subject: Re: [PATCH 4/6] kexec: A new system call, kexec_file_load, for in kernel kexec Message-ID: <20131121191907.GA26366@srcf.ucam.org> References: <1384969851-7251-1-git-send-email-vgoyal@redhat.com> <1384969851-7251-5-git-send-email-vgoyal@redhat.com> <20131121190350.GC17070@kroah.com> <20131121190620.GA25951@srcf.ucam.org> <20131121191305.GK16208@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131121191305.GK16208@redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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@srcf.ucam.org