[Bug 2064321] Re: Power guest secure boot with key management: kernel portion

** Tags removed: targetmilestone-inin2404
** Tags added: targetmilestone-inin2410

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https://bugs.launchpad.net/bugs/2064321

Title:
Power guest secure boot with key management: kernel portion

Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
New

Bug description:
Covering the kernel portion

Feature:

This feature comprises PowerVM LPAR guest OS kernel verification using
static keys to extend the chain of trust from partition firmware to
the OS kernel. GRUB and the host OS kernel are signed with 2 separate
public key pairs. Partition firmware includes the the public
verification key for GRUB in its build and uses it to verify GRUB.
GRUB includes the public verification key for the OS kernel in its
build and uses it to verify the OS kernel image

Test case:

If secure boot is switched off, any GRUB and kernel boots.
If secure boot is switched on:
- Properly signed GRUB boots.
- Improperly signed GRUB does not boot.
- Tampered signed GRUB does not boot.
- Properly signed kernels boot.
- Improperly signed kernels do not boot.
- Tampered signed kernels do not boot.
TPM PCRs are extended roughly following the TCG PC Client and UEFI specs as they apply to POWER.

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