[PATCH v2 7/7] ima: Support platform keyring for kernel appraisal

[James Morris]

On Sun, 9 Dec 2018, Nayna Jain wrote:

> On secure boot enabled systems, the bootloader verifies the kernel
> image and possibly the initramfs signatures based on a set of keys. A
> soft reboot(kexec) of the system, with the same kernel image and
> initramfs, requires access to the original keys to verify the
> signatures.
> 
> This patch allows IMA-appraisal access to those original keys, now
> loaded on the platform keyring, needed for verifying the kernel image
> and initramfs signatures.
> 
> Signed-off-by: Nayna Jain <nayna at linux.ibm.com>
> Reviewed-by: Mimi Zohar <zohar at linux.ibm.com>
> Acked-by: Serge Hallyn <serge at hallyn.com>
> - replace 'rc' with 'xattr_len' when calling integrity_digsig_verify()
> with INTEGRITY_KEYRING_IMA for readability
> Suggested-by: Serge Hallyn <serge at hallyn.com>


Reviewed-by: James Morris <james.morris at microsoft.com>

-- 
James Morris
<jmorris at namei.org>