1 /* internal.h: authentication token and access key management internal defs
3 * Copyright (C) 2003-5, 2007 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.
15 #include <linux/key-type.h>
16 #include <linux/key-ui.h>
18 static inline __attribute__((format(printf, 1, 2)))
19 void no_printk(const char *fmt, ...)
24 #define kenter(FMT, ...) \
25 printk(KERN_DEBUG "==> %s("FMT")\n", __func__, ##__VA_ARGS__)
26 #define kleave(FMT, ...) \
27 printk(KERN_DEBUG "<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
28 #define kdebug(FMT, ...) \
29 printk(KERN_DEBUG "xxx" FMT"yyy\n", ##__VA_ARGS__)
31 #define kenter(FMT, ...) \
32 no_printk(KERN_DEBUG "==> %s("FMT")\n", __func__, ##__VA_ARGS__)
33 #define kleave(FMT, ...) \
34 no_printk(KERN_DEBUG "<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
35 #define kdebug(FMT, ...) \
36 no_printk(KERN_DEBUG FMT"\n", ##__VA_ARGS__)
39 extern struct key_type key_type_user;
41 /*****************************************************************************/
43 * keep track of keys for a user
44 * - this needs to be separate to user_struct to avoid a refcount-loop
45 * (user_struct pins some keyrings which pin this struct)
46 * - this also keeps track of keys under request from userspace for this UID
50 struct mutex cons_lock; /* construction initiation lock */
52 atomic_t usage; /* for accessing qnkeys & qnbytes */
53 atomic_t nkeys; /* number of keys */
54 atomic_t nikeys; /* number of instantiated keys */
56 int qnkeys; /* number of keys allocated to this user */
57 int qnbytes; /* number of bytes allocated to this user */
60 extern struct rb_root key_user_tree;
61 extern spinlock_t key_user_lock;
62 extern struct key_user root_key_user;
64 extern struct key_user *key_user_lookup(uid_t uid);
65 extern void key_user_put(struct key_user *user);
69 * - root has its own separate limits to everyone else
71 extern unsigned key_quota_root_maxkeys;
72 extern unsigned key_quota_root_maxbytes;
73 extern unsigned key_quota_maxkeys;
74 extern unsigned key_quota_maxbytes;
76 #define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */
79 extern struct rb_root key_serial_tree;
80 extern spinlock_t key_serial_lock;
81 extern struct mutex key_construction_mutex;
82 extern wait_queue_head_t request_key_conswq;
85 extern int __key_link(struct key *keyring, struct key *key);
87 extern key_ref_t __keyring_search_one(key_ref_t keyring_ref,
88 const struct key_type *type,
89 const char *description,
92 extern struct key *keyring_search_instkey(struct key *keyring,
93 key_serial_t target_id);
95 typedef int (*key_match_func_t)(const struct key *, const void *);
97 extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
98 struct task_struct *tsk,
99 struct key_type *type,
100 const void *description,
101 key_match_func_t match);
103 extern key_ref_t search_process_keyrings(struct key_type *type,
104 const void *description,
105 key_match_func_t match,
106 struct task_struct *tsk);
108 extern struct key *find_keyring_by_name(const char *name, bool skip_perm_check);
110 extern int install_thread_keyring(struct task_struct *tsk);
111 extern int install_process_keyring(struct task_struct *tsk);
113 extern struct key *request_key_and_link(struct key_type *type,
114 const char *description,
115 const void *callout_info,
118 struct key *dest_keyring,
119 unsigned long flags);
122 * request_key authorisation
124 struct request_key_auth {
125 struct key *target_key;
126 struct task_struct *context;
132 extern struct key_type key_type_request_key_auth;
133 extern struct key *request_key_auth_new(struct key *target,
134 const void *callout_info,
137 extern struct key *key_get_instantiation_authkey(key_serial_t target_id);
142 extern long keyctl_get_keyring_ID(key_serial_t, int);
143 extern long keyctl_join_session_keyring(const char __user *);
144 extern long keyctl_update_key(key_serial_t, const void __user *, size_t);
145 extern long keyctl_revoke_key(key_serial_t);
146 extern long keyctl_keyring_clear(key_serial_t);
147 extern long keyctl_keyring_link(key_serial_t, key_serial_t);
148 extern long keyctl_keyring_unlink(key_serial_t, key_serial_t);
149 extern long keyctl_describe_key(key_serial_t, char __user *, size_t);
150 extern long keyctl_keyring_search(key_serial_t, const char __user *,
151 const char __user *, key_serial_t);
152 extern long keyctl_read_key(key_serial_t, char __user *, size_t);
153 extern long keyctl_chown_key(key_serial_t, uid_t, gid_t);
154 extern long keyctl_setperm_key(key_serial_t, key_perm_t);
155 extern long keyctl_instantiate_key(key_serial_t, const void __user *,
156 size_t, key_serial_t);
157 extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t);
158 extern long keyctl_set_reqkey_keyring(int);
159 extern long keyctl_set_timeout(key_serial_t, unsigned);
160 extern long keyctl_assume_authority(key_serial_t);
161 extern long keyctl_get_security(key_serial_t keyid, char __user *buffer,
165 * debugging key validation
168 extern void __key_check(const struct key *);
170 static inline void key_check(const struct key *key)
172 if (key && (IS_ERR(key) || key->magic != KEY_DEBUG_MAGIC))
178 #define key_check(key) do {} while(0)
182 #endif /* _INTERNAL_H */