Re: [PATCH v8 07/17] integrity: restrict INTEGRITY_KEYRING_MACHINE to restrict_link_by_ca
From: Darren Kenny <hidden>
Date: 2022-02-14 12:43:22
Also in:
keyrings, linux-crypto, linux-efi, linux-integrity, lkml
On Tuesday, 2021-11-23 at 23:41:14 -05, Eric Snowberg wrote:
Set the restriction check for INTEGRITY_KEYRING_MACHINE keys to restrict_link_by_ca. This will only allow CA keys into the machine keyring. Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Reviewed-by: Darren Kenny <redacted>
quoted hunk ↗ jump to hunk
--- v1: Initial version v2: Added !IS_ENABLED(CONFIG_INTEGRITY_TRUSTED_KEYRING check so mok keyring gets created even when it isn't enabled v3: Rename restrict_link_by_system_trusted_or_ca to restrict_link_by_ca v4: removed unnecessary restriction->check set v5: Rename to machine keyring v6: split line over 80 char (suggested by Mimi) v8: Unmodified from v6 --- security/integrity/digsig.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c index 910fe29a5037..e7dfc55a7c55 100644 --- a/security/integrity/digsig.c +++ b/security/integrity/digsig.c@@ -132,14 +132,18 @@ int __init integrity_init_keyring(const unsigned int id) goto out; } - if (!IS_ENABLED(CONFIG_INTEGRITY_TRUSTED_KEYRING)) + if (!IS_ENABLED(CONFIG_INTEGRITY_TRUSTED_KEYRING) && + id != INTEGRITY_KEYRING_MACHINE) return 0; restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL); if (!restriction) return -ENOMEM; - restriction->check = restrict_link_to_ima; + if (id == INTEGRITY_KEYRING_MACHINE) + restriction->check = restrict_link_by_ca; + else + restriction->check = restrict_link_to_ima; /* * No additional keys shall be allowed to load into the machine-- 2.18.4