[PATCH 3/4] KEYS: CA link restriction

[Mimi Zohar]

On Mon, 2022-03-07 at 18:06 +0000, Eric Snowberg wrote:
> 
> >> diff --git a/crypto/asymmetric_keys/restrict.c b/crypto/asymmetric_keys/restrict.c
> >> index 6b1ac5f5896a..49bb2ea7f609 100644
> >> --- a/crypto/asymmetric_keys/restrict.c
> >> +++ b/crypto/asymmetric_keys/restrict.c
> >> @@ -108,6 +108,49 @@ int restrict_link_by_signature(struct key *dest_keyring,
> >>  	return ret;
> >>  }
> >>  +/**
> >> + * restrict_link_by_ca - Restrict additions to a ring of CA keys
> >> + * @dest_keyring: Keyring being linked to.
> >> + * @type: The type of key being added.
> >> + * @payload: The payload of the new key.
> >> + * @trust_keyring: Unused.
> >> + *
> >> + * Check if the new certificate is a CA. If it is a CA, then mark the new
> >> + * certificate as being ok to link.
> > 
> > CA = root CA here, right?
> 
> Yes, I’ll update the comment

Updating the comment is not enough.  There's an existing function named
"x509_check_for_self_signed()" which determines whether the certificate
is self-signed.

thanks,

Mimi