1 /* key-ui.h: key userspace interface stuff
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #ifndef _LINUX_KEY_UI_H
13 #define _LINUX_KEY_UI_H
15 #include <linux/key.h>
18 extern struct rb_root key_serial_tree;
19 extern spinlock_t key_serial_lock;
21 /* required permissions */
22 #define KEY_VIEW 0x01 /* require permission to view attributes */
23 #define KEY_READ 0x02 /* require permission to read content */
24 #define KEY_WRITE 0x04 /* require permission to update / modify */
25 #define KEY_SEARCH 0x08 /* require permission to search (keyring) or find (key) */
26 #define KEY_LINK 0x10 /* require permission to link */
27 #define KEY_ALL 0x1f /* all the above permissions */
30 * the keyring payload contains a list of the keys to which the keyring is
34 struct rcu_head rcu; /* RCU deletion hook */
35 unsigned short maxkeys; /* max keys this list can hold */
36 unsigned short nkeys; /* number of keys currently held */
37 unsigned short delkey; /* key to be unlinked by RCU */
42 * check to see whether permission is granted to use a key in the desired way
44 extern int key_task_permission(const key_ref_t key_ref,
45 struct task_struct *context,
48 static inline int key_permission(const key_ref_t key_ref, key_perm_t perm)
50 return key_task_permission(key_ref, current, perm);
53 extern key_ref_t lookup_user_key(struct task_struct *context,
54 key_serial_t id, int create, int partial,
57 extern long join_session_keyring(const char *name);
59 extern struct key_type *key_type_lookup(const char *type);
60 extern void key_type_put(struct key_type *ktype);
62 #define key_negative_timeout 60 /* default timeout on a negative key's existence */
65 #endif /* _LINUX_KEY_UI_H */