Re: [PATCH v1 0/9] Enable root to update the blacklist keyring

Jarkko Sakkinen
2020-12-04T15:39:15Z

On Fri, Dec 04, 2020 at 02:01:36PM +0000, David Howells wrote:
> Mickaël Salaün <mic@digikod.net> wrote:
>
> > > What would be easiest way to smoke test the changes?
> >
> > An easy way to test it is to enable the second trusted keyring to
> > dynamically load certificates in the kernel. Then we can create a hash
> > of a valid certificate (but not loaded yet) and sign it as explained in
> > tools/certs/print-cert-tbs-hash.sh (patch 9/9). Once this hash is loaded
> > in the kernel, loading the blacklisted certificate will be denied. We
> > can also test it with a PKCS#7 signature chain, either with the
> > blacklist keyring itself, or with a signed dm-verity image.
>
> It might also be possible to use the pkcs#7 test key type
> (CONFIG_PKCS7_TEST_KEY) to aid in that.
>
> David

Thanks, note taken.

/Jarkko