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-rw-r--r--include/linux/security.h73
1 files changed, 73 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h
index 607ee20..f7e0ae0 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -30,6 +30,7 @@
#include <linux/shm.h>
#include <linux/msg.h>
#include <linux/sched.h>
+#include <linux/key.h>
struct ctl_table;
@@ -788,6 +789,27 @@ struct swap_info_struct;
* @sk_free_security:
* Deallocate security structure.
*
+ * Security hooks affecting all Key Management operations
+ *
+ * @key_alloc:
+ * Permit allocation of a key and assign security data. Note that key does
+ * not have a serial number assigned at this point.
+ * @key points to the key.
+ * Return 0 if permission is granted, -ve error otherwise.
+ * @key_free:
+ * Notification of destruction; free security data.
+ * @key points to the key.
+ * No return value.
+ * @key_permission:
+ * See whether a specific operational right is granted to a process on a
+ * key.
+ * @key_ref refers to the key (key pointer + possession attribute bit).
+ * @context points to the process to provide the context against which to
+ * evaluate the security data on the key.
+ * @perm describes the combination of permissions required of this key.
+ * Return 1 if permission granted, 0 if permission denied and -ve it the
+ * normal permissions model should be effected.
+ *
* Security hooks affecting all System V IPC operations.
*
* @ipc_permission:
@@ -1216,6 +1238,17 @@ struct security_operations {
int (*sk_alloc_security) (struct sock *sk, int family, gfp_t priority);
void (*sk_free_security) (struct sock *sk);
#endif /* CONFIG_SECURITY_NETWORK */
+
+ /* key management security hooks */
+#ifdef CONFIG_KEYS
+ int (*key_alloc)(struct key *key);
+ void (*key_free)(struct key *key);
+ int (*key_permission)(key_ref_t key_ref,
+ struct task_struct *context,
+ key_perm_t perm);
+
+#endif /* CONFIG_KEYS */
+
};
/* global variables */
@@ -2764,5 +2797,45 @@ static inline void security_sk_free(struct sock *sk)
}
#endif /* CONFIG_SECURITY_NETWORK */
+#ifdef CONFIG_KEYS
+#ifdef CONFIG_SECURITY
+static inline int security_key_alloc(struct key *key)
+{
+ return security_ops->key_alloc(key);
+}
+
+static inline void security_key_free(struct key *key)
+{
+ security_ops->key_free(key);
+}
+
+static inline int security_key_permission(key_ref_t key_ref,
+ struct task_struct *context,
+ key_perm_t perm)
+{
+ return security_ops->key_permission(key_ref, context, perm);
+}
+
+#else
+
+static inline int security_key_alloc(struct key *key)
+{
+ return 0;
+}
+
+static inline void security_key_free(struct key *key)
+{
+}
+
+static inline int security_key_permission(key_ref_t key_ref,
+ struct task_struct *context,
+ key_perm_t perm)
+{
+ return 0;
+}
+
+#endif
+#endif /* CONFIG_KEYS */
+
#endif /* ! __LINUX_SECURITY_H */
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