Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
76181c13 | 2 | /* Authentication token and access key management |
1da177e4 | 3 | * |
76181c13 | 4 | * Copyright (C) 2004, 2007 Red Hat, Inc. All Rights Reserved. |
1da177e4 LT |
5 | * Written by David Howells (dhowells@redhat.com) |
6 | * | |
b68101a1 | 7 | * See Documentation/security/keys/core.rst for information on keys/keyrings. |
1da177e4 LT |
8 | */ |
9 | ||
10 | #ifndef _LINUX_KEY_H | |
11 | #define _LINUX_KEY_H | |
12 | ||
13 | #include <linux/types.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/rbtree.h> | |
76d8aeab | 16 | #include <linux/rcupdate.h> |
0b77f5bf | 17 | #include <linux/sysctl.h> |
aa84442d | 18 | #include <linux/rwsem.h> |
60063497 | 19 | #include <linux/atomic.h> |
b2a4df20 | 20 | #include <linux/assoc_array.h> |
fff29291 | 21 | #include <linux/refcount.h> |
074d5898 | 22 | #include <linux/time64.h> |
1da177e4 LT |
23 | |
24 | #ifdef __KERNEL__ | |
9a56c2db | 25 | #include <linux/uidgid.h> |
1da177e4 LT |
26 | |
27 | /* key handle serial number */ | |
28 | typedef int32_t key_serial_t; | |
29 | ||
028db3e2 LT |
30 | /* key handle permissions mask */ |
31 | typedef uint32_t key_perm_t; | |
32 | ||
1da177e4 | 33 | struct key; |
a58946c1 | 34 | struct net; |
1da177e4 LT |
35 | |
36 | #ifdef CONFIG_KEYS | |
37 | ||
2e12256b | 38 | #undef KEY_DEBUGGING |
6b79ccb5 | 39 | |
028db3e2 LT |
40 | #define KEY_POS_VIEW 0x01000000 /* possessor can view a key's attributes */ |
41 | #define KEY_POS_READ 0x02000000 /* possessor can read key payload / view keyring */ | |
42 | #define KEY_POS_WRITE 0x04000000 /* possessor can update key payload / add link to keyring */ | |
43 | #define KEY_POS_SEARCH 0x08000000 /* possessor can find a key in search / search a keyring */ | |
44 | #define KEY_POS_LINK 0x10000000 /* possessor can create a link to a key/keyring */ | |
45 | #define KEY_POS_SETATTR 0x20000000 /* possessor can set key attributes */ | |
46 | #define KEY_POS_ALL 0x3f000000 | |
47 | ||
48 | #define KEY_USR_VIEW 0x00010000 /* user permissions... */ | |
49 | #define KEY_USR_READ 0x00020000 | |
50 | #define KEY_USR_WRITE 0x00040000 | |
51 | #define KEY_USR_SEARCH 0x00080000 | |
52 | #define KEY_USR_LINK 0x00100000 | |
53 | #define KEY_USR_SETATTR 0x00200000 | |
54 | #define KEY_USR_ALL 0x003f0000 | |
55 | ||
56 | #define KEY_GRP_VIEW 0x00000100 /* group permissions... */ | |
57 | #define KEY_GRP_READ 0x00000200 | |
58 | #define KEY_GRP_WRITE 0x00000400 | |
59 | #define KEY_GRP_SEARCH 0x00000800 | |
60 | #define KEY_GRP_LINK 0x00001000 | |
61 | #define KEY_GRP_SETATTR 0x00002000 | |
62 | #define KEY_GRP_ALL 0x00003f00 | |
63 | ||
64 | #define KEY_OTH_VIEW 0x00000001 /* third party permissions... */ | |
65 | #define KEY_OTH_READ 0x00000002 | |
66 | #define KEY_OTH_WRITE 0x00000004 | |
67 | #define KEY_OTH_SEARCH 0x00000008 | |
68 | #define KEY_OTH_LINK 0x00000010 | |
69 | #define KEY_OTH_SETATTR 0x00000020 | |
70 | #define KEY_OTH_ALL 0x0000003f | |
71 | ||
72 | #define KEY_PERM_UNDEF 0xffffffff | |
73 | ||
8c0637e9 DH |
74 | /* |
75 | * The permissions required on a key that we're looking up. | |
76 | */ | |
77 | enum key_need_perm { | |
78 | KEY_NEED_UNSPECIFIED, /* Needed permission unspecified */ | |
79 | KEY_NEED_VIEW, /* Require permission to view attributes */ | |
80 | KEY_NEED_READ, /* Require permission to read content */ | |
81 | KEY_NEED_WRITE, /* Require permission to update / modify */ | |
82 | KEY_NEED_SEARCH, /* Require permission to search (keyring) or find (key) */ | |
83 | KEY_NEED_LINK, /* Require permission to link */ | |
84 | KEY_NEED_SETATTR, /* Require permission to change attributes */ | |
85 | KEY_NEED_UNLINK, /* Require permission to unlink key */ | |
86 | KEY_SYSADMIN_OVERRIDE, /* Special: override by CAP_SYS_ADMIN */ | |
87 | KEY_AUTHTOKEN_OVERRIDE, /* Special: override by possession of auth token */ | |
88 | KEY_DEFER_PERM_CHECK, /* Special: permission check is deferred */ | |
89 | }; | |
90 | ||
1da177e4 LT |
91 | struct seq_file; |
92 | struct user_struct; | |
93 | struct signal_struct; | |
d84f4f99 | 94 | struct cred; |
1da177e4 LT |
95 | |
96 | struct key_type; | |
97 | struct key_owner; | |
3b6e4de0 | 98 | struct key_tag; |
1da177e4 LT |
99 | struct keyring_list; |
100 | struct keyring_name; | |
101 | ||
3b6e4de0 DH |
102 | struct key_tag { |
103 | struct rcu_head rcu; | |
104 | refcount_t usage; | |
105 | bool removed; /* T when subject removed */ | |
106 | }; | |
107 | ||
16feef43 | 108 | struct keyring_index_key { |
355ef8e1 DH |
109 | /* [!] If this structure is altered, the union in struct key must change too! */ |
110 | unsigned long hash; /* Hash value */ | |
f771fde8 DH |
111 | union { |
112 | struct { | |
113 | #ifdef __LITTLE_ENDIAN /* Put desc_len at the LSB of x */ | |
555df336 DH |
114 | u16 desc_len; |
115 | char desc[sizeof(long) - 2]; /* First few chars of description */ | |
f771fde8 | 116 | #else |
555df336 DH |
117 | char desc[sizeof(long) - 2]; /* First few chars of description */ |
118 | u16 desc_len; | |
f771fde8 DH |
119 | #endif |
120 | }; | |
121 | unsigned long x; | |
122 | }; | |
16feef43 | 123 | struct key_type *type; |
3b6e4de0 | 124 | struct key_tag *domain_tag; /* Domain of operation */ |
16feef43 | 125 | const char *description; |
16feef43 DH |
126 | }; |
127 | ||
146aa8b1 DH |
128 | union key_payload { |
129 | void __rcu *rcu_data0; | |
130 | void *data[4]; | |
131 | }; | |
132 | ||
664cceb0 DH |
133 | /*****************************************************************************/ |
134 | /* | |
135 | * key reference with possession attribute handling | |
136 | * | |
137 | * NOTE! key_ref_t is a typedef'd pointer to a type that is not actually | |
138 | * defined. This is because we abuse the bottom bit of the reference to carry a | |
139 | * flag to indicate whether the calling process possesses that key in one of | |
140 | * its keyrings. | |
141 | * | |
142 | * the key_ref_t has been made a separate type so that the compiler can reject | |
143 | * attempts to dereference it without proper conversion. | |
144 | * | |
145 | * the three functions are used to assemble and disassemble references | |
146 | */ | |
147 | typedef struct __key_reference_with_attributes *key_ref_t; | |
148 | ||
149 | static inline key_ref_t make_key_ref(const struct key *key, | |
a5b4bd28 | 150 | bool possession) |
664cceb0 DH |
151 | { |
152 | return (key_ref_t) ((unsigned long) key | possession); | |
153 | } | |
154 | ||
155 | static inline struct key *key_ref_to_ptr(const key_ref_t key_ref) | |
156 | { | |
157 | return (struct key *) ((unsigned long) key_ref & ~1UL); | |
158 | } | |
159 | ||
a5b4bd28 | 160 | static inline bool is_key_possessed(const key_ref_t key_ref) |
664cceb0 DH |
161 | { |
162 | return (unsigned long) key_ref & 1UL; | |
163 | } | |
164 | ||
aaf66c88 | 165 | typedef int (*key_restrict_link_func_t)(struct key *dest_keyring, |
469ff8f7 | 166 | const struct key_type *type, |
aaf66c88 MM |
167 | const union key_payload *payload, |
168 | struct key *restriction_key); | |
469ff8f7 | 169 | |
e9cc0f68 MM |
170 | struct key_restriction { |
171 | key_restrict_link_func_t check; | |
172 | struct key *key; | |
173 | struct key_type *keytype; | |
174 | }; | |
175 | ||
363b02da DH |
176 | enum key_state { |
177 | KEY_IS_UNINSTANTIATED, | |
178 | KEY_IS_POSITIVE, /* Positively instantiated */ | |
179 | }; | |
180 | ||
1da177e4 LT |
181 | /*****************************************************************************/ |
182 | /* | |
183 | * authentication token / access credential / keyring | |
184 | * - types of key include: | |
185 | * - keyrings | |
186 | * - disk encryption IDs | |
187 | * - Kerberos TGTs and tickets | |
188 | */ | |
189 | struct key { | |
fff29291 | 190 | refcount_t usage; /* number of references */ |
1da177e4 | 191 | key_serial_t serial; /* key serial number */ |
65d87fe6 DH |
192 | union { |
193 | struct list_head graveyard_link; | |
194 | struct rb_node serial_node; | |
195 | }; | |
f7e47677 DH |
196 | #ifdef CONFIG_KEY_NOTIFICATIONS |
197 | struct watch_list *watchers; /* Entities watching this key for changes */ | |
198 | #endif | |
1da177e4 LT |
199 | struct rw_semaphore sem; /* change vs change sem */ |
200 | struct key_user *user; /* owner of this key */ | |
29db9190 | 201 | void *security; /* security data for this key */ |
5d135440 | 202 | union { |
074d5898 BW |
203 | time64_t expiry; /* time at which key expires (or 0) */ |
204 | time64_t revoked_at; /* time at which key was revoked */ | |
5d135440 | 205 | }; |
074d5898 | 206 | time64_t last_used_at; /* last time used for LRU keyring discard */ |
9a56c2db EB |
207 | kuid_t uid; |
208 | kgid_t gid; | |
028db3e2 | 209 | key_perm_t perm; /* access permissions */ |
1da177e4 | 210 | unsigned short quotalen; /* length added to quota */ |
76d8aeab DH |
211 | unsigned short datalen; /* payload data length |
212 | * - may not match RCU dereferenced payload | |
213 | * - payload should contain own length | |
214 | */ | |
363b02da | 215 | short state; /* Key state (+) or rejection error (-) */ |
1da177e4 LT |
216 | |
217 | #ifdef KEY_DEBUGGING | |
218 | unsigned magic; | |
219 | #define KEY_DEBUG_MAGIC 0x18273645u | |
1da177e4 LT |
220 | #endif |
221 | ||
76d8aeab | 222 | unsigned long flags; /* status flags (change with bitops) */ |
363b02da DH |
223 | #define KEY_FLAG_DEAD 0 /* set if key type has been deleted */ |
224 | #define KEY_FLAG_REVOKED 1 /* set if key had been revoked */ | |
225 | #define KEY_FLAG_IN_QUOTA 2 /* set if key consumes quota */ | |
226 | #define KEY_FLAG_USER_CONSTRUCT 3 /* set if key is being constructed in userspace */ | |
227 | #define KEY_FLAG_ROOT_CAN_CLEAR 4 /* set if key can be cleared by root without permission */ | |
228 | #define KEY_FLAG_INVALIDATED 5 /* set if key has been invalidated */ | |
229 | #define KEY_FLAG_BUILTIN 6 /* set if key is built in to the kernel */ | |
230 | #define KEY_FLAG_ROOT_CAN_INVAL 7 /* set if key can be invalidated by root without permission */ | |
231 | #define KEY_FLAG_KEEP 8 /* set if key should not be removed */ | |
232 | #define KEY_FLAG_UID_KEYRING 9 /* set if key is a user or user session keyring */ | |
76d8aeab | 233 | |
16feef43 DH |
234 | /* the key type and key description string |
235 | * - the desc is used to match a key against search criteria | |
236 | * - it should be a printable string | |
1da177e4 LT |
237 | * - eg: for krb5 AFS, this might be "afs@REDHAT.COM" |
238 | */ | |
16feef43 DH |
239 | union { |
240 | struct keyring_index_key index_key; | |
241 | struct { | |
355ef8e1 | 242 | unsigned long hash; |
f771fde8 | 243 | unsigned long len_desc; |
16feef43 | 244 | struct key_type *type; /* type of key */ |
3b6e4de0 | 245 | struct key_tag *domain_tag; /* Domain of operation */ |
16feef43 DH |
246 | char *description; |
247 | }; | |
248 | }; | |
1da177e4 | 249 | |
1da177e4 LT |
250 | /* key data |
251 | * - this is used to hold the data actually used in cryptography or | |
252 | * whatever | |
253 | */ | |
254 | union { | |
146aa8b1 DH |
255 | union key_payload payload; |
256 | struct { | |
257 | /* Keyring bits */ | |
258 | struct list_head name_link; | |
259 | struct assoc_array keys; | |
260 | }; | |
b2a4df20 | 261 | }; |
5ac7eace DH |
262 | |
263 | /* This is set on a keyring to restrict the addition of a link to a key | |
2b6aa412 | 264 | * to it. If this structure isn't provided then it is assumed that the |
5ac7eace | 265 | * keyring is open to any addition. It is ignored for non-keyring |
6563c91f MM |
266 | * keys. Only set this value using keyring_restrict(), keyring_alloc(), |
267 | * or key_alloc(). | |
5ac7eace DH |
268 | * |
269 | * This is intended for use with rings of trusted keys whereby addition | |
270 | * to the keyring needs to be controlled. KEY_ALLOC_BYPASS_RESTRICTION | |
271 | * overrides this, allowing the kernel to add extra keys without | |
272 | * restriction. | |
273 | */ | |
2b6aa412 | 274 | struct key_restriction *restrict_link; |
1da177e4 LT |
275 | }; |
276 | ||
1da177e4 LT |
277 | extern struct key *key_alloc(struct key_type *type, |
278 | const char *desc, | |
9a56c2db | 279 | kuid_t uid, kgid_t gid, |
d84f4f99 | 280 | const struct cred *cred, |
028db3e2 | 281 | key_perm_t perm, |
5ac7eace | 282 | unsigned long flags, |
2b6aa412 | 283 | struct key_restriction *restrict_link); |
7e047ef5 DH |
284 | |
285 | ||
5ac7eace DH |
286 | #define KEY_ALLOC_IN_QUOTA 0x0000 /* add to quota, reject if would overrun */ |
287 | #define KEY_ALLOC_QUOTA_OVERRUN 0x0001 /* add to quota, permit even if overrun */ | |
288 | #define KEY_ALLOC_NOT_IN_QUOTA 0x0002 /* not in quota */ | |
77f68bac DH |
289 | #define KEY_ALLOC_BUILT_IN 0x0004 /* Key is built into kernel */ |
290 | #define KEY_ALLOC_BYPASS_RESTRICTION 0x0008 /* Override the check on restricted keyrings */ | |
237bbd29 | 291 | #define KEY_ALLOC_UID_KEYRING 0x0010 /* allocating a user or user session keyring */ |
4993e1f9 | 292 | #define KEY_ALLOC_SET_KEEP 0x0020 /* Set the KEEP flag on the key/keyring */ |
7e047ef5 | 293 | |
1da177e4 | 294 | extern void key_revoke(struct key *key); |
fd75815f | 295 | extern void key_invalidate(struct key *key); |
1da177e4 | 296 | extern void key_put(struct key *key); |
3b6e4de0 | 297 | extern bool key_put_tag(struct key_tag *tag); |
218e6424 | 298 | extern void key_remove_domain(struct key_tag *domain_tag); |
1da177e4 | 299 | |
ccc3e6d9 | 300 | static inline struct key *__key_get(struct key *key) |
1da177e4 | 301 | { |
fff29291 | 302 | refcount_inc(&key->usage); |
1da177e4 LT |
303 | return key; |
304 | } | |
305 | ||
ccc3e6d9 DH |
306 | static inline struct key *key_get(struct key *key) |
307 | { | |
308 | return key ? __key_get(key) : key; | |
309 | } | |
310 | ||
664cceb0 DH |
311 | static inline void key_ref_put(key_ref_t key_ref) |
312 | { | |
313 | key_put(key_ref_to_ptr(key_ref)); | |
314 | } | |
315 | ||
a58946c1 DH |
316 | extern struct key *request_key_tag(struct key_type *type, |
317 | const char *description, | |
318 | struct key_tag *domain_tag, | |
028db3e2 | 319 | const char *callout_info); |
1da177e4 | 320 | |
896f1950 | 321 | extern struct key *request_key_rcu(struct key_type *type, |
a58946c1 DH |
322 | const char *description, |
323 | struct key_tag *domain_tag); | |
896f1950 | 324 | |
4e54f085 DH |
325 | extern struct key *request_key_with_auxdata(struct key_type *type, |
326 | const char *description, | |
a58946c1 | 327 | struct key_tag *domain_tag, |
4a38e122 DH |
328 | const void *callout_info, |
329 | size_t callout_len, | |
028db3e2 | 330 | void *aux); |
76181c13 | 331 | |
a58946c1 DH |
332 | /** |
333 | * request_key - Request a key and wait for construction | |
334 | * @type: Type of key. | |
335 | * @description: The searchable description of the key. | |
336 | * @callout_info: The data to pass to the instantiation upcall (or NULL). | |
337 | * | |
338 | * As for request_key_tag(), but with the default global domain tag. | |
339 | */ | |
340 | static inline struct key *request_key(struct key_type *type, | |
341 | const char *description, | |
028db3e2 | 342 | const char *callout_info) |
a58946c1 | 343 | { |
028db3e2 | 344 | return request_key_tag(type, description, NULL, callout_info); |
a58946c1 DH |
345 | } |
346 | ||
347 | #ifdef CONFIG_NET | |
8b6a666a | 348 | /** |
a58946c1 DH |
349 | * request_key_net - Request a key for a net namespace and wait for construction |
350 | * @type: Type of key. | |
351 | * @description: The searchable description of the key. | |
352 | * @net: The network namespace that is the key's domain of operation. | |
353 | * @callout_info: The data to pass to the instantiation upcall (or NULL). | |
354 | * | |
355 | * As for request_key() except that it does not add the returned key to a | |
356 | * keyring if found, new keys are always allocated in the user's quota, the | |
357 | * callout_info must be a NUL-terminated string and no auxiliary data can be | |
358 | * passed. Only keys that operate the specified network namespace are used. | |
359 | * | |
360 | * Furthermore, it then works as wait_for_key_construction() to wait for the | |
361 | * completion of keys undergoing construction with a non-interruptible wait. | |
362 | */ | |
028db3e2 | 363 | #define request_key_net(type, description, net, callout_info) \ |
464e96ae | 364 | request_key_tag(type, description, net->key_domain, callout_info) |
8b6a666a DH |
365 | |
366 | /** | |
367 | * request_key_net_rcu - Request a key for a net namespace under RCU conditions | |
368 | * @type: Type of key. | |
369 | * @description: The searchable description of the key. | |
370 | * @net: The network namespace that is the key's domain of operation. | |
371 | * | |
372 | * As for request_key_rcu() except that only keys that operate the specified | |
373 | * network namespace are used. | |
374 | */ | |
375 | #define request_key_net_rcu(type, description, net) \ | |
464e96ae | 376 | request_key_rcu(type, description, net->key_domain) |
a58946c1 DH |
377 | #endif /* CONFIG_NET */ |
378 | ||
76181c13 DH |
379 | extern int wait_for_key_construction(struct key *key, bool intr); |
380 | ||
b404aef7 | 381 | extern int key_validate(const struct key *key); |
1da177e4 | 382 | |
664cceb0 DH |
383 | extern key_ref_t key_create_or_update(key_ref_t keyring, |
384 | const char *type, | |
385 | const char *description, | |
386 | const void *payload, | |
387 | size_t plen, | |
028db3e2 | 388 | key_perm_t perm, |
7e047ef5 | 389 | unsigned long flags); |
1da177e4 | 390 | |
664cceb0 | 391 | extern int key_update(key_ref_t key, |
1da177e4 LT |
392 | const void *payload, |
393 | size_t plen); | |
394 | ||
395 | extern int key_link(struct key *keyring, | |
396 | struct key *key); | |
397 | ||
ed0ac5c7 DH |
398 | extern int key_move(struct key *key, |
399 | struct key *from_keyring, | |
400 | struct key *to_keyring, | |
401 | unsigned int flags); | |
402 | ||
1da177e4 LT |
403 | extern int key_unlink(struct key *keyring, |
404 | struct key *key); | |
405 | ||
9a56c2db | 406 | extern struct key *keyring_alloc(const char *description, kuid_t uid, kgid_t gid, |
d84f4f99 | 407 | const struct cred *cred, |
028db3e2 | 408 | key_perm_t perm, |
7e047ef5 | 409 | unsigned long flags, |
2b6aa412 | 410 | struct key_restriction *restrict_link, |
d720024e | 411 | struct key *dest); |
1da177e4 | 412 | |
5ac7eace DH |
413 | extern int restrict_link_reject(struct key *keyring, |
414 | const struct key_type *type, | |
aaf66c88 MM |
415 | const union key_payload *payload, |
416 | struct key *restriction_key); | |
5ac7eace | 417 | |
1da177e4 LT |
418 | extern int keyring_clear(struct key *keyring); |
419 | ||
664cceb0 DH |
420 | extern key_ref_t keyring_search(key_ref_t keyring, |
421 | struct key_type *type, | |
dcf49dbc DH |
422 | const char *description, |
423 | bool recurse); | |
1da177e4 | 424 | |
1da177e4 LT |
425 | extern int keyring_add_key(struct key *keyring, |
426 | struct key *key); | |
427 | ||
6563c91f MM |
428 | extern int keyring_restrict(key_ref_t keyring, const char *type, |
429 | const char *restriction); | |
430 | ||
1da177e4 LT |
431 | extern struct key *key_lookup(key_serial_t id); |
432 | ||
456a8167 | 433 | static inline key_serial_t key_serial(const struct key *key) |
7249db2c DH |
434 | { |
435 | return key ? key->serial : 0; | |
436 | } | |
1da177e4 | 437 | |
59e6b9c1 BS |
438 | extern void key_set_timeout(struct key *, unsigned); |
439 | ||
76ef5e17 | 440 | extern key_ref_t lookup_user_key(key_serial_t id, unsigned long flags, |
8c0637e9 | 441 | enum key_need_perm need_perm); |
b206f281 | 442 | extern void key_free_user_ns(struct user_namespace *); |
76ef5e17 | 443 | |
363b02da DH |
444 | static inline short key_read_state(const struct key *key) |
445 | { | |
446 | /* Barrier versus mark_key_instantiated(). */ | |
447 | return smp_load_acquire(&key->state); | |
448 | } | |
449 | ||
78b7280c | 450 | /** |
363b02da | 451 | * key_is_positive - Determine if a key has been positively instantiated |
78b7280c DH |
452 | * @key: The key to check. |
453 | * | |
454 | * Return true if the specified key has been positively instantiated, false | |
455 | * otherwise. | |
456 | */ | |
363b02da DH |
457 | static inline bool key_is_positive(const struct key *key) |
458 | { | |
459 | return key_read_state(key) == KEY_IS_POSITIVE; | |
460 | } | |
461 | ||
462 | static inline bool key_is_negative(const struct key *key) | |
78b7280c | 463 | { |
363b02da | 464 | return key_read_state(key) < 0; |
78b7280c DH |
465 | } |
466 | ||
0837e49a DH |
467 | #define dereference_key_rcu(KEY) \ |
468 | (rcu_dereference((KEY)->payload.rcu_data0)) | |
469 | ||
470 | #define dereference_key_locked(KEY) \ | |
146aa8b1 | 471 | (rcu_dereference_protected((KEY)->payload.rcu_data0, \ |
633e804e DH |
472 | rwsem_is_locked(&((struct key *)(KEY))->sem))) |
473 | ||
ee0b31a2 | 474 | #define rcu_assign_keypointer(KEY, PAYLOAD) \ |
e5c1f444 | 475 | do { \ |
146aa8b1 | 476 | rcu_assign_pointer((KEY)->payload.rcu_data0, (PAYLOAD)); \ |
e5c1f444 | 477 | } while (0) |
ee0b31a2 | 478 | |
0b77f5bf | 479 | #ifdef CONFIG_SYSCTL |
d6f50c95 | 480 | extern struct ctl_table key_sysctls[]; |
0b77f5bf | 481 | #endif |
1da177e4 LT |
482 | /* |
483 | * the userspace interface | |
484 | */ | |
d84f4f99 | 485 | extern int install_thread_keyring_to_cred(struct cred *cred); |
2e21865f DH |
486 | extern void key_fsuid_changed(struct cred *new_cred); |
487 | extern void key_fsgid_changed(struct cred *new_cred); | |
1da177e4 LT |
488 | extern void key_init(void); |
489 | ||
490 | #else /* CONFIG_KEYS */ | |
491 | ||
492 | #define key_validate(k) 0 | |
493 | #define key_serial(k) 0 | |
7888e7ff | 494 | #define key_get(k) ({ NULL; }) |
0dab9cfa | 495 | #define key_revoke(k) do { } while(0) |
fd75815f | 496 | #define key_invalidate(k) do { } while(0) |
1da177e4 | 497 | #define key_put(k) do { } while(0) |
664cceb0 | 498 | #define key_ref_put(k) do { } while(0) |
8bbf4976 DH |
499 | #define make_key_ref(k, p) NULL |
500 | #define key_ref_to_ptr(k) NULL | |
664cceb0 | 501 | #define is_key_possessed(k) 0 |
2e21865f DH |
502 | #define key_fsuid_changed(c) do { } while(0) |
503 | #define key_fsgid_changed(c) do { } while(0) | |
1da177e4 | 504 | #define key_init() do { } while(0) |
b206f281 | 505 | #define key_free_user_ns(ns) do { } while(0) |
218e6424 | 506 | #define key_remove_domain(d) do { } while(0) |
1da177e4 LT |
507 | |
508 | #endif /* CONFIG_KEYS */ | |
509 | #endif /* __KERNEL__ */ | |
510 | #endif /* _LINUX_KEY_H */ |