[PATCH] selinux: add hooks for key subsystem
Introduce SELinux hooks to support the access key retention subsystem
within the kernel. Incorporate new flask headers from a modified version
of the SELinux reference policy, with support for the new security class
representing retained keys. Extend the "key_alloc" security hook with a
task parameter representing the intended ownership context for the key
being allocated. Attach security information to root's default keyrings
within the SELinux initialization routine.
Has passed David's testsuite.
Signed-off-by: Michael LeMay <mdlemay@epoch.ncsc.mil>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/key.h b/include/linux/key.h
index cbf464a..8c275d1 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -241,8 +241,9 @@
extern struct key *key_alloc(struct key_type *type,
const char *desc,
- uid_t uid, gid_t gid, key_perm_t perm,
- int not_in_quota);
+ uid_t uid, gid_t gid,
+ struct task_struct *ctx,
+ key_perm_t perm, int not_in_quota);
extern int key_payload_reserve(struct key *key, size_t datalen);
extern int key_instantiate_and_link(struct key *key,
const void *data,
@@ -292,7 +293,9 @@
struct key *key);
extern struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
- int not_in_quota, struct key *dest);
+ struct task_struct *ctx,
+ int not_in_quota,
+ struct key *dest);
extern int keyring_clear(struct key *keyring);
@@ -313,7 +316,8 @@
* the userspace interface
*/
extern struct key root_user_keyring, root_session_keyring;
-extern int alloc_uid_keyring(struct user_struct *user);
+extern int alloc_uid_keyring(struct user_struct *user,
+ struct task_struct *ctx);
extern void switch_uid_keyring(struct user_struct *new_user);
extern int copy_keys(unsigned long clone_flags, struct task_struct *tsk);
extern int copy_thread_group_keys(struct task_struct *tsk);
@@ -342,7 +346,7 @@
#define make_key_ref(k) ({ NULL; })
#define key_ref_to_ptr(k) ({ NULL; })
#define is_key_possessed(k) 0
-#define alloc_uid_keyring(u) 0
+#define alloc_uid_keyring(u,c) 0
#define switch_uid_keyring(u) do { } while(0)
#define __install_session_keyring(t, k) ({ NULL; })
#define copy_keys(f,t) 0
@@ -355,6 +359,10 @@
#define key_fsgid_changed(t) do { } while(0)
#define key_init() do { } while(0)
+/* Initial keyrings */
+extern struct key root_user_keyring;
+extern struct key root_session_keyring;
+
#endif /* CONFIG_KEYS */
#endif /* __KERNEL__ */
#endif /* _LINUX_KEY_H */