[PATCH 4/6] kexec: A new system call, kexec_file_load, for in kernel kexec

[Vivek Goyal]

On Thu, Nov 21, 2013 at 07:19:07PM +0000, Matthew Garrett wrote:
> 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.

Then I can't assume that RSA signatures are appened to bzImage, as we
do for modules.

Also I am assuming that authenticode signing will change something in
PE/COFF header and that would invalidate the bzImage signature.

Thanks
Vivek