[PATCH RFC 08/12] integrity: restrict INTEGRITY_KEYRING_MOK to restrict_link_by_secondary_trusted_or_ca

[Eric Snowberg]

Set the restriction check for INTEGRITY_KEYRING_MOK keys to
restrict_link_by_secondary_trusted_or_ca.  This will only allow keys
into the mok keyring that are either a CA or trusted by a key contained
within the secondary trusted keyring.

Signed-off-by: Eric Snowberg <eric.snowberg@xxxxxxxxxx>
---
 security/integrity/digsig.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 56800a5f1e10..07547f1a4806 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -140,6 +140,11 @@ int __init integrity_init_keyring(const unsigned int id)
 		return -ENOMEM;
 
 	restriction->check = restrict_link_to_ima;
+	if (id == INTEGRITY_KEYRING_MOK)
+		restriction->check = restrict_link_by_secondary_trusted_or_ca;
+	else
+		restriction->check = restrict_link_to_ima;
+
 	perm |= KEY_USR_WRITE;
 
 out:
-- 
2.18.4