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


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