[PATCH RFC 08/12] integrity: restrict INTEGRITY_KEYRING_MOK to restrict_link_by_secondary_trusted_or_ca
From: Eric Snowberg <eric.snowberg@oracle.com>
Date: 2021-07-07 02:45:40
Also in:
keyrings, linux-crypto, linux-security-module, lkml
Subsystem:
extended verification module (evm), integrity measurement architecture (ima), security subsystem, the rest · Maintainers:
Mimi Zohar, Roberto Sassu, Dmitry Kasatkin, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
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@oracle.com> --- 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