[PATCH 1/3] KEYS: DigitalSignature link restriction

[Mimi Zohar]

On Mon, 2023-05-08 at 18:07 -0400, Eric Snowberg wrote:
> Add a new link restriction.  Restrict the addition of keys in a keyring
> based on the key having digitalSignature usage set. Additionally, verify
> the new certificate against the ones in the system keyrings.  Add two
> additional functions to use the new restriction within either the builtin
> or secondary keyrings.
> 
> Signed-off-by: Eric Snowberg <eric.snowberg at oracle.com>

Thanks, Eric.

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