[PATCH 0/3] Add support for signing grub with an appended signature

[Daniel Axtens <dja@axtens.net>]

Part of a secure boot chain is allowing boot firmware to verify the
grub core.img. For UEFI platforms, this is done by signing the PE
binary with a tool like pesign or sb-sign. However, for platforms that
don't implement UEFI, an alternative scheme is required.

These patches provide some infrastructure and documentation for
signing grub's core.img with a Linux-kernel-module style appended
signature.

Because some platforms, such as powerpc-ieee1275, load grub from a raw
disk partition rather than a filesystem, we extend grub-install to add
an ELF note that allows us to specify the size and location of the
signature.

More details are in patch 1, including a link to an open-source firmware
capable of verifying a grub image signed this way.

Daniel Axtens (2):
  docs/grub: Document signing grub under UEFI
  docs/grub: Document signing grub with an appended signature

Rashmica Gupta (1):
  Add suport for signing grub with an appended signature

 docs/grub.texi              | 64 ++++++++++++++++++++++++++++++++++++-
 include/grub/util/install.h |  8 +++--
 include/grub/util/mkimage.h |  4 +--
 util/grub-install-common.c  | 16 ++++++++--
 util/grub-mkimage.c         | 11 +++++++
 util/grub-mkimagexx.c       | 39 +++++++++++++++++++++-
 util/mkimage.c              | 10 +++---
 7 files changed, 138 insertions(+), 14 deletions(-)

-- 
2.25.1