Re: [PATCH v2] integrity: Always reference the blacklist keyring with apprasial

From: Mimi Zohar
Date: Wed Jul 12 2023 - 13:41:16 EST


On Wed, 2023-07-05 at 18:52 -0400, Eric Snowberg wrote:
> Commit 273df864cf746 ("ima: Check against blacklisted hashes for files with
> modsig") introduced an appraise_flag option for referencing the blacklist
> keyring. Any matching binary found on this keyring fails signature
> validation. This flag only works with module appended signatures.
>
> An important part of a PKI infrastructure is to have the ability to do
> revocation at a later time should a vulnerability be found. Expand the
> revocation flag usage to all appraisal functions. The flag is now
> enabled by default. Setting the flag with an IMA policy has been
> deprecated. Without a revocation capability like this in place, only
> authenticity can be maintained. With this change, integrity can now be
> achieved with digital signature based IMA appraisal.
>
> Signed-off-by: Eric Snowberg <eric.snowberg@xxxxxxxxxx>

Thanks, Eric. Other than including "appraise_flag=check_blacklist"
when displaying the measurement list, it looks good.
--
thanks,

Mimi