[Bug 2064345] Re: Power guest secure boot with key management: userspace portion

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

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https://bugs.launchpad.net/bugs/2064345

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

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

Bug description:
Covering the userspace portion (secvarctl)

Feature:

This feature comprises PowerVM LPAR guest OS kernel verification to
extend the chain of trust from partition firmware to the OS kernel and
includes key management. 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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