KEYS: Split role of the keyring pointer for keyring restrict functions
The first argument to the restrict_link_func_t functions was a keyring
pointer. These functions are called by the key subsystem with this
argument set to the destination keyring, but restrict_link_by_signature
expects a pointer to the relevant trusted keyring.
Restrict functions may need something other than a single struct key
pointer to allow or reject key linkage, so the data used to make that
decision (such as the trust keyring) is moved to a new, fourth
argument. The first argument is now always the destination keyring.
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
diff --git a/certs/system_keyring.c b/certs/system_keyring.c
index 50979d6..e39cce6 100644
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c
@@ -32,11 +32,13 @@
* Restrict the addition of keys into a keyring based on the key-to-be-added
* being vouched for by a key in the built in system keyring.
*/
-int restrict_link_by_builtin_trusted(struct key *keyring,
+int restrict_link_by_builtin_trusted(struct key *dest_keyring,
const struct key_type *type,
- const union key_payload *payload)
+ const union key_payload *payload,
+ struct key *restriction_key)
{
- return restrict_link_by_signature(builtin_trusted_keys, type, payload);
+ return restrict_link_by_signature(dest_keyring, type, payload,
+ builtin_trusted_keys);
}
#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
@@ -49,20 +51,22 @@
* keyrings.
*/
int restrict_link_by_builtin_and_secondary_trusted(
- struct key *keyring,
+ struct key *dest_keyring,
const struct key_type *type,
- const union key_payload *payload)
+ const union key_payload *payload,
+ struct key *restrict_key)
{
/* If we have a secondary trusted keyring, then that contains a link
* through to the builtin keyring and the search will follow that link.
*/
if (type == &key_type_keyring &&
- keyring == secondary_trusted_keys &&
+ dest_keyring == secondary_trusted_keys &&
payload == &builtin_trusted_keys->payload)
/* Allow the builtin keyring to be added to the secondary */
return 0;
- return restrict_link_by_signature(secondary_trusted_keys, type, payload);
+ return restrict_link_by_signature(dest_keyring, type, payload,
+ secondary_trusted_keys);
}
#endif