[PATCH 5/7] efi: Import certificates from UEFI Secure Boot

[Mimi Zohar]

On Sun, 2018-11-25 at 20:44 +0530, Nayna Jain wrote:
> From: Josh Boyer <jwboyer at fedoraproject.org>
> 
> New Patch Description:
> ======================
> 
> Secure Boot stores a list of allowed certificates in the 'db' variable.
> This patch imports those certificates into the platform keyring. The shim
> UEFI bootloader has a similar certificate list stored in the 'MokListRT'
> variable. We import those as well.
> 
> Secure Boot also maintains a list of disallowed certificates in the 'dbx'
> variable. We load those certificates into the system blacklist keyring
> and forbid any kernel signed with those from loading.
> 
> Original Patch Description:
> ============================
> 
> Secure Boot stores a list of allowed certificates in the 'db' variable.
> This imports those certificates into the system trusted keyring.  This
> allows for a third party signing certificate to be used in conjunction
> with signed modules. By importing the public certificate into the 'db'
> variable, a user can allow a module signed with that certificate to
> load. The shim UEFI bootloader has a similar certificate list stored
> in the 'MokListRT' variable. We import those as well.
> 
> Secure Boot also maintains a list of disallowed certificates in the 'dbx'
> variable. We load those certificates into the newly introduced system
> blacklist keyring and forbid any module signed with those from loading and
> forbid the use within the kernel of any key with a matching hash.
> 
> This facility is enabled by setting CONFIG_LOAD_UEFI_KEYS.

There are quite a few checkpatch.pl warnings that need to be
addressed, including the missing SPDX license.

Mimi