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| author | Eric Snowberg <eric.snowberg@oracle.com> | 2022-01-26 05:58:31 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2022-03-08 14:55:52 +0300 |
| commit | 087aa4ed379054951cb3c8ccaa0c4dbafd903c01 (patch) | |
| tree | 047426a773b2102dbb56ff42f866683665ca56c1 /include/keys | |
| parent | 56edb6c25f11f25df153f4804f2d5bced2b49a9e (diff) | |
| download | linux-087aa4ed379054951cb3c8ccaa0c4dbafd903c01.tar.xz | |
KEYS: Introduce link restriction for machine keys
Introduce a new link restriction that includes the trusted builtin,
secondary and machine keys. The restriction is based on the key to be
added being vouched for by a key in any of these three keyrings.
With the introduction of the machine keyring, the end-user may choose to
trust Machine Owner Keys (MOK) within the kernel. If they have chosen to
trust them, the .machine keyring will contain these keys. If not, the
machine keyring will always be empty. Update the restriction check to
allow the secondary trusted keyring to also trust machine keys.
Allow the .machine keyring to be linked to the secondary_trusted_keys.
After the link is created, keys contained in the .machine keyring will
automatically be searched when searching secondary_trusted_keys.
Suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Tested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'include/keys')
| -rw-r--r-- | include/keys/system_keyring.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h index 98c9b10cdc17..2419a735420f 100644 --- a/include/keys/system_keyring.h +++ b/include/keys/system_keyring.h @@ -39,8 +39,14 @@ extern int restrict_link_by_builtin_and_secondary_trusted( #endif #ifdef CONFIG_INTEGRITY_MACHINE_KEYRING +extern int restrict_link_by_builtin_secondary_and_machine( + struct key *dest_keyring, + const struct key_type *type, + const union key_payload *payload, + struct key *restrict_key); extern void __init set_machine_trusted_keys(struct key *keyring); #else +#define restrict_link_by_builtin_secondary_and_machine restrict_link_by_builtin_trusted static inline void __init set_machine_trusted_keys(struct key *keyring) { } |