Re: [PATCH v7 01/17] integrity: Introduce a Linux keyring called machine

Mimi Zohar
2021-11-17T13:02:43Z

Hi Eric,

On Mon, 2021-11-15 at 19:15 -0500, Eric Snowberg wrote:
> Many UEFI Linux distributions boot using shim. The UEFI shim provides
> what is called Machine Owner Keys (MOK). Shim uses both the UEFI Secure
> Boot DB and MOK keys to validate the next step in the boot chain. The
> MOK facility can be used to import user generated keys. These keys can
> be used to sign an end-users development kernel build. When Linux
> boots, both UEFI Secure Boot DB and MOK keys get loaded in the Linux
> .platform keyring.

, which can be used to verify kexec'ed kernel images.

> Define a new Linux keyring called machine. This keyring shall contain just
> MOK CA keys and not the remaining keys in the platform keyring. This new
> machine keyring will be used in follow on patches. Unlike keys in the
> platform keyring, keys contained in the machine keyring will be trusted
> within the kernel if the end-user has chosen to do so.

allowing, for example, keys to be loaded onto the trusted IMA keyring.

>
> Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>

Thank you for all the work! Just letting you know I'm slowly making my
through the patch set. With the previous patch re-organization, we
should be able to test everything up to the introduction of the MOK
variable support.

Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>