Resending the same set of patches. For some reason, the first paragraph of the cover letter got deleted in the original set. Hopefully this will go through fine.
These patches add support for embedding the public key efi signature list(esl) file into the platform's device tree. The current solution for the Qemu arm64 platform has the public key as part of an overlay, and stored on the Efi System Partition(ESP). Having the provision to embed the public key into the platform's dtb which is then concatenated with the u-boot binary is a better approach, recommended by Heinrich[1].
Patch 1 fixes an issue of selection of IMAGE_SIGN_INFO config option when capsule authentication is enabled.
Patch 2 add two config symbols, EFI_PKEY_DTB_EMBED and EFI_PKEY_FILE which are used for enabling embedding of the public key in the dtb, and specifying the esl file name.
Patch 3 moves efi_capsule_auth_enabled as a weak function, which can be used as a default mechanism for checking if capsule authentication has been enabled.
Patch 4 adds a default weak function for retrieving the public key from the platform's dtb.
Patch 5 adds the functionality to embed the esl file into the platform's dtb during the platform build.
I have tested this functionality on the STM32MP157C DK2 board, and it works as expected.
[1] - https://lists.denx.de/pipermail/u-boot/2021-March/442867.html
Sughosh Ganu (5): efi_loader: Kconfig: Select IMAGE_SIGN_INFO when capsule authentication is enabled efi_loader: Kconfig: Add symbols for embedding the public key into the platform's dtb efi_capsule: Add a weak function to check whether capsule authentication is enabled efi_capsule: Add a weak function to get the public key needed for capsule authentication Makefile: Add provision for embedding public key in platform's dtb
Makefile | 10 ++++++ board/emulation/common/qemu_capsule.c | 6 ---- lib/efi_loader/Kconfig | 16 ++++++++++ lib/efi_loader/efi_capsule.c | 44 ++++++++++++++++++++++++--- 4 files changed, 66 insertions(+), 10 deletions(-)