Commit | Line | Data |
---|---|---|
973c9f4f | 1 | /* Userspace key control operations |
1da177e4 | 2 | * |
3e30148c | 3 | * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved. |
1da177e4 LT |
4 | * Written by David Howells (dhowells@redhat.com) |
5 | * | |
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. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/syscalls.h> | |
59e6b9c1 | 17 | #include <linux/key.h> |
1da177e4 LT |
18 | #include <linux/keyctl.h> |
19 | #include <linux/fs.h> | |
c59ede7b | 20 | #include <linux/capability.h> |
0cb409d9 | 21 | #include <linux/string.h> |
1da177e4 | 22 | #include <linux/err.h> |
38bbca6b | 23 | #include <linux/vmalloc.h> |
70a5bb72 | 24 | #include <linux/security.h> |
1da177e4 LT |
25 | #include <asm/uaccess.h> |
26 | #include "internal.h" | |
27 | ||
0cb409d9 DA |
28 | static int key_get_type_from_user(char *type, |
29 | const char __user *_type, | |
30 | unsigned len) | |
31 | { | |
32 | int ret; | |
33 | ||
34 | ret = strncpy_from_user(type, _type, len); | |
0cb409d9 | 35 | if (ret < 0) |
4303ef19 | 36 | return ret; |
0cb409d9 DA |
37 | if (ret == 0 || ret >= len) |
38 | return -EINVAL; | |
0cb409d9 DA |
39 | if (type[0] == '.') |
40 | return -EPERM; | |
0cb409d9 | 41 | type[len - 1] = '\0'; |
0cb409d9 DA |
42 | return 0; |
43 | } | |
44 | ||
1da177e4 | 45 | /* |
973c9f4f DH |
46 | * Extract the description of a new key from userspace and either add it as a |
47 | * new key to the specified keyring or update a matching key in that keyring. | |
48 | * | |
49 | * The keyring must be writable so that we can attach the key to it. | |
50 | * | |
51 | * If successful, the new key's serial number is returned, otherwise an error | |
52 | * code is returned. | |
1da177e4 | 53 | */ |
1e7bfb21 HC |
54 | SYSCALL_DEFINE5(add_key, const char __user *, _type, |
55 | const char __user *, _description, | |
56 | const void __user *, _payload, | |
57 | size_t, plen, | |
58 | key_serial_t, ringid) | |
1da177e4 | 59 | { |
664cceb0 | 60 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
61 | char type[32], *description; |
62 | void *payload; | |
0cb409d9 | 63 | long ret; |
38bbca6b | 64 | bool vm; |
1da177e4 LT |
65 | |
66 | ret = -EINVAL; | |
38bbca6b | 67 | if (plen > 1024 * 1024 - 1) |
1da177e4 LT |
68 | goto error; |
69 | ||
70 | /* draw all the data into kernel space */ | |
0cb409d9 | 71 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
72 | if (ret < 0) |
73 | goto error; | |
1da177e4 | 74 | |
0cb409d9 DA |
75 | description = strndup_user(_description, PAGE_SIZE); |
76 | if (IS_ERR(description)) { | |
77 | ret = PTR_ERR(description); | |
1da177e4 | 78 | goto error; |
0cb409d9 | 79 | } |
1da177e4 LT |
80 | |
81 | /* pull the payload in if one was supplied */ | |
82 | payload = NULL; | |
83 | ||
38bbca6b | 84 | vm = false; |
1da177e4 LT |
85 | if (_payload) { |
86 | ret = -ENOMEM; | |
87 | payload = kmalloc(plen, GFP_KERNEL); | |
38bbca6b DH |
88 | if (!payload) { |
89 | if (plen <= PAGE_SIZE) | |
90 | goto error2; | |
91 | vm = true; | |
92 | payload = vmalloc(plen); | |
93 | if (!payload) | |
94 | goto error2; | |
95 | } | |
1da177e4 LT |
96 | |
97 | ret = -EFAULT; | |
98 | if (copy_from_user(payload, _payload, plen) != 0) | |
99 | goto error3; | |
100 | } | |
101 | ||
102 | /* find the target keyring (which must be writable) */ | |
5593122e | 103 | keyring_ref = lookup_user_key(ringid, KEY_LOOKUP_CREATE, KEY_WRITE); |
664cceb0 DH |
104 | if (IS_ERR(keyring_ref)) { |
105 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
106 | goto error3; |
107 | } | |
108 | ||
109 | /* create or update the requested key and add it to the target | |
110 | * keyring */ | |
664cceb0 | 111 | key_ref = key_create_or_update(keyring_ref, type, description, |
6b79ccb5 AR |
112 | payload, plen, KEY_PERM_UNDEF, |
113 | KEY_ALLOC_IN_QUOTA); | |
664cceb0 DH |
114 | if (!IS_ERR(key_ref)) { |
115 | ret = key_ref_to_ptr(key_ref)->serial; | |
116 | key_ref_put(key_ref); | |
1da177e4 LT |
117 | } |
118 | else { | |
664cceb0 | 119 | ret = PTR_ERR(key_ref); |
1da177e4 LT |
120 | } |
121 | ||
664cceb0 | 122 | key_ref_put(keyring_ref); |
1da177e4 | 123 | error3: |
38bbca6b DH |
124 | if (!vm) |
125 | kfree(payload); | |
126 | else | |
127 | vfree(payload); | |
1da177e4 LT |
128 | error2: |
129 | kfree(description); | |
130 | error: | |
131 | return ret; | |
a8b17ed0 | 132 | } |
1da177e4 | 133 | |
1da177e4 | 134 | /* |
973c9f4f DH |
135 | * Search the process keyrings and keyring trees linked from those for a |
136 | * matching key. Keyrings must have appropriate Search permission to be | |
137 | * searched. | |
138 | * | |
139 | * If a key is found, it will be attached to the destination keyring if there's | |
140 | * one specified and the serial number of the key will be returned. | |
141 | * | |
142 | * If no key is found, /sbin/request-key will be invoked if _callout_info is | |
143 | * non-NULL in an attempt to create a key. The _callout_info string will be | |
144 | * passed to /sbin/request-key to aid with completing the request. If the | |
145 | * _callout_info string is "" then it will be changed to "-". | |
1da177e4 | 146 | */ |
1e7bfb21 HC |
147 | SYSCALL_DEFINE4(request_key, const char __user *, _type, |
148 | const char __user *, _description, | |
149 | const char __user *, _callout_info, | |
150 | key_serial_t, destringid) | |
1da177e4 LT |
151 | { |
152 | struct key_type *ktype; | |
664cceb0 DH |
153 | struct key *key; |
154 | key_ref_t dest_ref; | |
4a38e122 | 155 | size_t callout_len; |
1da177e4 | 156 | char type[32], *description, *callout_info; |
0cb409d9 | 157 | long ret; |
1da177e4 LT |
158 | |
159 | /* pull the type into kernel space */ | |
0cb409d9 | 160 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
161 | if (ret < 0) |
162 | goto error; | |
1260f801 | 163 | |
1da177e4 | 164 | /* pull the description into kernel space */ |
0cb409d9 DA |
165 | description = strndup_user(_description, PAGE_SIZE); |
166 | if (IS_ERR(description)) { | |
167 | ret = PTR_ERR(description); | |
1da177e4 | 168 | goto error; |
0cb409d9 | 169 | } |
1da177e4 LT |
170 | |
171 | /* pull the callout info into kernel space */ | |
172 | callout_info = NULL; | |
4a38e122 | 173 | callout_len = 0; |
1da177e4 | 174 | if (_callout_info) { |
0cb409d9 DA |
175 | callout_info = strndup_user(_callout_info, PAGE_SIZE); |
176 | if (IS_ERR(callout_info)) { | |
177 | ret = PTR_ERR(callout_info); | |
1da177e4 | 178 | goto error2; |
0cb409d9 | 179 | } |
4a38e122 | 180 | callout_len = strlen(callout_info); |
1da177e4 LT |
181 | } |
182 | ||
183 | /* get the destination keyring if specified */ | |
664cceb0 | 184 | dest_ref = NULL; |
1da177e4 | 185 | if (destringid) { |
5593122e DH |
186 | dest_ref = lookup_user_key(destringid, KEY_LOOKUP_CREATE, |
187 | KEY_WRITE); | |
664cceb0 DH |
188 | if (IS_ERR(dest_ref)) { |
189 | ret = PTR_ERR(dest_ref); | |
1da177e4 LT |
190 | goto error3; |
191 | } | |
192 | } | |
193 | ||
194 | /* find the key type */ | |
195 | ktype = key_type_lookup(type); | |
196 | if (IS_ERR(ktype)) { | |
197 | ret = PTR_ERR(ktype); | |
198 | goto error4; | |
199 | } | |
200 | ||
201 | /* do the search */ | |
4a38e122 DH |
202 | key = request_key_and_link(ktype, description, callout_info, |
203 | callout_len, NULL, key_ref_to_ptr(dest_ref), | |
7e047ef5 | 204 | KEY_ALLOC_IN_QUOTA); |
1da177e4 LT |
205 | if (IS_ERR(key)) { |
206 | ret = PTR_ERR(key); | |
207 | goto error5; | |
208 | } | |
209 | ||
4aab1e89 DH |
210 | /* wait for the key to finish being constructed */ |
211 | ret = wait_for_key_construction(key, 1); | |
212 | if (ret < 0) | |
213 | goto error6; | |
214 | ||
1da177e4 LT |
215 | ret = key->serial; |
216 | ||
4aab1e89 | 217 | error6: |
3e30148c | 218 | key_put(key); |
c5b60b5e | 219 | error5: |
1da177e4 | 220 | key_type_put(ktype); |
c5b60b5e | 221 | error4: |
664cceb0 | 222 | key_ref_put(dest_ref); |
c5b60b5e | 223 | error3: |
1da177e4 | 224 | kfree(callout_info); |
c5b60b5e | 225 | error2: |
1da177e4 | 226 | kfree(description); |
c5b60b5e | 227 | error: |
1da177e4 | 228 | return ret; |
a8b17ed0 | 229 | } |
1da177e4 | 230 | |
1da177e4 | 231 | /* |
973c9f4f DH |
232 | * Get the ID of the specified process keyring. |
233 | * | |
234 | * The requested keyring must have search permission to be found. | |
235 | * | |
236 | * If successful, the ID of the requested keyring will be returned. | |
1da177e4 LT |
237 | */ |
238 | long keyctl_get_keyring_ID(key_serial_t id, int create) | |
239 | { | |
664cceb0 | 240 | key_ref_t key_ref; |
5593122e | 241 | unsigned long lflags; |
1da177e4 LT |
242 | long ret; |
243 | ||
5593122e DH |
244 | lflags = create ? KEY_LOOKUP_CREATE : 0; |
245 | key_ref = lookup_user_key(id, lflags, KEY_SEARCH); | |
664cceb0 DH |
246 | if (IS_ERR(key_ref)) { |
247 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
248 | goto error; |
249 | } | |
250 | ||
664cceb0 DH |
251 | ret = key_ref_to_ptr(key_ref)->serial; |
252 | key_ref_put(key_ref); | |
c5b60b5e | 253 | error: |
1da177e4 | 254 | return ret; |
973c9f4f | 255 | } |
1da177e4 | 256 | |
1da177e4 | 257 | /* |
973c9f4f DH |
258 | * Join a (named) session keyring. |
259 | * | |
260 | * Create and join an anonymous session keyring or join a named session | |
261 | * keyring, creating it if necessary. A named session keyring must have Search | |
262 | * permission for it to be joined. Session keyrings without this permit will | |
263 | * be skipped over. | |
264 | * | |
265 | * If successful, the ID of the joined session keyring will be returned. | |
1da177e4 LT |
266 | */ |
267 | long keyctl_join_session_keyring(const char __user *_name) | |
268 | { | |
269 | char *name; | |
0cb409d9 | 270 | long ret; |
1da177e4 LT |
271 | |
272 | /* fetch the name from userspace */ | |
273 | name = NULL; | |
274 | if (_name) { | |
0cb409d9 DA |
275 | name = strndup_user(_name, PAGE_SIZE); |
276 | if (IS_ERR(name)) { | |
277 | ret = PTR_ERR(name); | |
1da177e4 | 278 | goto error; |
0cb409d9 | 279 | } |
1da177e4 LT |
280 | } |
281 | ||
282 | /* join the session */ | |
283 | ret = join_session_keyring(name); | |
0d54ee1c | 284 | kfree(name); |
1da177e4 | 285 | |
c5b60b5e | 286 | error: |
1da177e4 | 287 | return ret; |
a8b17ed0 | 288 | } |
1da177e4 | 289 | |
1da177e4 | 290 | /* |
973c9f4f DH |
291 | * Update a key's data payload from the given data. |
292 | * | |
293 | * The key must grant the caller Write permission and the key type must support | |
294 | * updating for this to work. A negative key can be positively instantiated | |
295 | * with this call. | |
296 | * | |
297 | * If successful, 0 will be returned. If the key type does not support | |
298 | * updating, then -EOPNOTSUPP will be returned. | |
1da177e4 LT |
299 | */ |
300 | long keyctl_update_key(key_serial_t id, | |
301 | const void __user *_payload, | |
302 | size_t plen) | |
303 | { | |
664cceb0 | 304 | key_ref_t key_ref; |
1da177e4 LT |
305 | void *payload; |
306 | long ret; | |
307 | ||
308 | ret = -EINVAL; | |
309 | if (plen > PAGE_SIZE) | |
310 | goto error; | |
311 | ||
312 | /* pull the payload in if one was supplied */ | |
313 | payload = NULL; | |
314 | if (_payload) { | |
315 | ret = -ENOMEM; | |
316 | payload = kmalloc(plen, GFP_KERNEL); | |
317 | if (!payload) | |
318 | goto error; | |
319 | ||
320 | ret = -EFAULT; | |
321 | if (copy_from_user(payload, _payload, plen) != 0) | |
322 | goto error2; | |
323 | } | |
324 | ||
325 | /* find the target key (which must be writable) */ | |
5593122e | 326 | key_ref = lookup_user_key(id, 0, KEY_WRITE); |
664cceb0 DH |
327 | if (IS_ERR(key_ref)) { |
328 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
329 | goto error2; |
330 | } | |
331 | ||
332 | /* update the key */ | |
664cceb0 | 333 | ret = key_update(key_ref, payload, plen); |
1da177e4 | 334 | |
664cceb0 | 335 | key_ref_put(key_ref); |
c5b60b5e | 336 | error2: |
1da177e4 | 337 | kfree(payload); |
c5b60b5e | 338 | error: |
1da177e4 | 339 | return ret; |
a8b17ed0 | 340 | } |
1da177e4 | 341 | |
1da177e4 | 342 | /* |
973c9f4f DH |
343 | * Revoke a key. |
344 | * | |
345 | * The key must be grant the caller Write or Setattr permission for this to | |
346 | * work. The key type should give up its quota claim when revoked. The key | |
347 | * and any links to the key will be automatically garbage collected after a | |
348 | * certain amount of time (/proc/sys/kernel/keys/gc_delay). | |
349 | * | |
350 | * If successful, 0 is returned. | |
1da177e4 LT |
351 | */ |
352 | long keyctl_revoke_key(key_serial_t id) | |
353 | { | |
664cceb0 | 354 | key_ref_t key_ref; |
1da177e4 LT |
355 | long ret; |
356 | ||
5593122e | 357 | key_ref = lookup_user_key(id, 0, KEY_WRITE); |
664cceb0 DH |
358 | if (IS_ERR(key_ref)) { |
359 | ret = PTR_ERR(key_ref); | |
0c2c9a3f DH |
360 | if (ret != -EACCES) |
361 | goto error; | |
362 | key_ref = lookup_user_key(id, 0, KEY_SETATTR); | |
363 | if (IS_ERR(key_ref)) { | |
364 | ret = PTR_ERR(key_ref); | |
365 | goto error; | |
366 | } | |
1da177e4 LT |
367 | } |
368 | ||
664cceb0 | 369 | key_revoke(key_ref_to_ptr(key_ref)); |
1da177e4 LT |
370 | ret = 0; |
371 | ||
664cceb0 | 372 | key_ref_put(key_ref); |
c5b60b5e | 373 | error: |
1260f801 | 374 | return ret; |
a8b17ed0 | 375 | } |
1da177e4 | 376 | |
1da177e4 | 377 | /* |
973c9f4f DH |
378 | * Clear the specified keyring, creating an empty process keyring if one of the |
379 | * special keyring IDs is used. | |
380 | * | |
381 | * The keyring must grant the caller Write permission for this to work. If | |
382 | * successful, 0 will be returned. | |
1da177e4 LT |
383 | */ |
384 | long keyctl_keyring_clear(key_serial_t ringid) | |
385 | { | |
664cceb0 | 386 | key_ref_t keyring_ref; |
1da177e4 LT |
387 | long ret; |
388 | ||
5593122e | 389 | keyring_ref = lookup_user_key(ringid, KEY_LOOKUP_CREATE, KEY_WRITE); |
664cceb0 DH |
390 | if (IS_ERR(keyring_ref)) { |
391 | ret = PTR_ERR(keyring_ref); | |
700920eb DH |
392 | |
393 | /* Root is permitted to invalidate certain special keyrings */ | |
394 | if (capable(CAP_SYS_ADMIN)) { | |
395 | keyring_ref = lookup_user_key(ringid, 0, 0); | |
396 | if (IS_ERR(keyring_ref)) | |
397 | goto error; | |
398 | if (test_bit(KEY_FLAG_ROOT_CAN_CLEAR, | |
399 | &key_ref_to_ptr(keyring_ref)->flags)) | |
400 | goto clear; | |
401 | goto error_put; | |
402 | } | |
403 | ||
1da177e4 LT |
404 | goto error; |
405 | } | |
406 | ||
700920eb | 407 | clear: |
664cceb0 | 408 | ret = keyring_clear(key_ref_to_ptr(keyring_ref)); |
700920eb | 409 | error_put: |
664cceb0 | 410 | key_ref_put(keyring_ref); |
c5b60b5e | 411 | error: |
1da177e4 | 412 | return ret; |
a8b17ed0 | 413 | } |
1da177e4 | 414 | |
1da177e4 | 415 | /* |
973c9f4f DH |
416 | * Create a link from a keyring to a key if there's no matching key in the |
417 | * keyring, otherwise replace the link to the matching key with a link to the | |
418 | * new key. | |
419 | * | |
420 | * The key must grant the caller Link permission and the the keyring must grant | |
421 | * the caller Write permission. Furthermore, if an additional link is created, | |
422 | * the keyring's quota will be extended. | |
423 | * | |
424 | * If successful, 0 will be returned. | |
1da177e4 LT |
425 | */ |
426 | long keyctl_keyring_link(key_serial_t id, key_serial_t ringid) | |
427 | { | |
664cceb0 | 428 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
429 | long ret; |
430 | ||
5593122e | 431 | keyring_ref = lookup_user_key(ringid, KEY_LOOKUP_CREATE, KEY_WRITE); |
664cceb0 DH |
432 | if (IS_ERR(keyring_ref)) { |
433 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
434 | goto error; |
435 | } | |
436 | ||
5593122e | 437 | key_ref = lookup_user_key(id, KEY_LOOKUP_CREATE, KEY_LINK); |
664cceb0 DH |
438 | if (IS_ERR(key_ref)) { |
439 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
440 | goto error2; |
441 | } | |
442 | ||
664cceb0 | 443 | ret = key_link(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref)); |
1da177e4 | 444 | |
664cceb0 | 445 | key_ref_put(key_ref); |
c5b60b5e | 446 | error2: |
664cceb0 | 447 | key_ref_put(keyring_ref); |
c5b60b5e | 448 | error: |
1da177e4 | 449 | return ret; |
a8b17ed0 | 450 | } |
1da177e4 | 451 | |
1da177e4 | 452 | /* |
973c9f4f DH |
453 | * Unlink a key from a keyring. |
454 | * | |
455 | * The keyring must grant the caller Write permission for this to work; the key | |
456 | * itself need not grant the caller anything. If the last link to a key is | |
457 | * removed then that key will be scheduled for destruction. | |
458 | * | |
459 | * If successful, 0 will be returned. | |
1da177e4 LT |
460 | */ |
461 | long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid) | |
462 | { | |
664cceb0 | 463 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
464 | long ret; |
465 | ||
5593122e | 466 | keyring_ref = lookup_user_key(ringid, 0, KEY_WRITE); |
664cceb0 DH |
467 | if (IS_ERR(keyring_ref)) { |
468 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
469 | goto error; |
470 | } | |
471 | ||
5593122e | 472 | key_ref = lookup_user_key(id, KEY_LOOKUP_FOR_UNLINK, 0); |
664cceb0 DH |
473 | if (IS_ERR(key_ref)) { |
474 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
475 | goto error2; |
476 | } | |
477 | ||
664cceb0 | 478 | ret = key_unlink(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref)); |
1da177e4 | 479 | |
664cceb0 | 480 | key_ref_put(key_ref); |
c5b60b5e | 481 | error2: |
664cceb0 | 482 | key_ref_put(keyring_ref); |
c5b60b5e | 483 | error: |
1da177e4 | 484 | return ret; |
a8b17ed0 | 485 | } |
1da177e4 | 486 | |
1da177e4 | 487 | /* |
973c9f4f DH |
488 | * Return a description of a key to userspace. |
489 | * | |
490 | * The key must grant the caller View permission for this to work. | |
491 | * | |
492 | * If there's a buffer, we place up to buflen bytes of data into it formatted | |
493 | * in the following way: | |
494 | * | |
1da177e4 | 495 | * type;uid;gid;perm;description<NUL> |
973c9f4f DH |
496 | * |
497 | * If successful, we return the amount of description available, irrespective | |
498 | * of how much we may have copied into the buffer. | |
1da177e4 LT |
499 | */ |
500 | long keyctl_describe_key(key_serial_t keyid, | |
501 | char __user *buffer, | |
502 | size_t buflen) | |
503 | { | |
3e30148c | 504 | struct key *key, *instkey; |
664cceb0 | 505 | key_ref_t key_ref; |
1da177e4 LT |
506 | char *tmpbuf; |
507 | long ret; | |
508 | ||
5593122e | 509 | key_ref = lookup_user_key(keyid, KEY_LOOKUP_PARTIAL, KEY_VIEW); |
664cceb0 | 510 | if (IS_ERR(key_ref)) { |
3e30148c DH |
511 | /* viewing a key under construction is permitted if we have the |
512 | * authorisation token handy */ | |
664cceb0 | 513 | if (PTR_ERR(key_ref) == -EACCES) { |
3e30148c DH |
514 | instkey = key_get_instantiation_authkey(keyid); |
515 | if (!IS_ERR(instkey)) { | |
516 | key_put(instkey); | |
8bbf4976 | 517 | key_ref = lookup_user_key(keyid, |
5593122e DH |
518 | KEY_LOOKUP_PARTIAL, |
519 | 0); | |
664cceb0 | 520 | if (!IS_ERR(key_ref)) |
3e30148c DH |
521 | goto okay; |
522 | } | |
523 | } | |
524 | ||
664cceb0 | 525 | ret = PTR_ERR(key_ref); |
1da177e4 LT |
526 | goto error; |
527 | } | |
528 | ||
3e30148c | 529 | okay: |
1da177e4 LT |
530 | /* calculate how much description we're going to return */ |
531 | ret = -ENOMEM; | |
532 | tmpbuf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
533 | if (!tmpbuf) | |
534 | goto error2; | |
535 | ||
664cceb0 DH |
536 | key = key_ref_to_ptr(key_ref); |
537 | ||
1da177e4 | 538 | ret = snprintf(tmpbuf, PAGE_SIZE - 1, |
664cceb0 | 539 | "%s;%d;%d;%08x;%s", |
94fd8405 DH |
540 | key->type->name, |
541 | key->uid, | |
542 | key->gid, | |
543 | key->perm, | |
544 | key->description ?: ""); | |
1da177e4 LT |
545 | |
546 | /* include a NUL char at the end of the data */ | |
547 | if (ret > PAGE_SIZE - 1) | |
548 | ret = PAGE_SIZE - 1; | |
549 | tmpbuf[ret] = 0; | |
550 | ret++; | |
551 | ||
552 | /* consider returning the data */ | |
553 | if (buffer && buflen > 0) { | |
554 | if (buflen > ret) | |
555 | buflen = ret; | |
556 | ||
557 | if (copy_to_user(buffer, tmpbuf, buflen) != 0) | |
558 | ret = -EFAULT; | |
559 | } | |
560 | ||
561 | kfree(tmpbuf); | |
c5b60b5e | 562 | error2: |
664cceb0 | 563 | key_ref_put(key_ref); |
c5b60b5e | 564 | error: |
1da177e4 | 565 | return ret; |
a8b17ed0 | 566 | } |
1da177e4 | 567 | |
1da177e4 | 568 | /* |
973c9f4f DH |
569 | * Search the specified keyring and any keyrings it links to for a matching |
570 | * key. Only keyrings that grant the caller Search permission will be searched | |
571 | * (this includes the starting keyring). Only keys with Search permission can | |
572 | * be found. | |
573 | * | |
574 | * If successful, the found key will be linked to the destination keyring if | |
575 | * supplied and the key has Link permission, and the found key ID will be | |
576 | * returned. | |
1da177e4 LT |
577 | */ |
578 | long keyctl_keyring_search(key_serial_t ringid, | |
579 | const char __user *_type, | |
580 | const char __user *_description, | |
581 | key_serial_t destringid) | |
582 | { | |
583 | struct key_type *ktype; | |
664cceb0 | 584 | key_ref_t keyring_ref, key_ref, dest_ref; |
1da177e4 | 585 | char type[32], *description; |
0cb409d9 | 586 | long ret; |
1da177e4 LT |
587 | |
588 | /* pull the type and description into kernel space */ | |
0cb409d9 | 589 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
590 | if (ret < 0) |
591 | goto error; | |
1da177e4 | 592 | |
0cb409d9 DA |
593 | description = strndup_user(_description, PAGE_SIZE); |
594 | if (IS_ERR(description)) { | |
595 | ret = PTR_ERR(description); | |
1da177e4 | 596 | goto error; |
0cb409d9 | 597 | } |
1da177e4 LT |
598 | |
599 | /* get the keyring at which to begin the search */ | |
5593122e | 600 | keyring_ref = lookup_user_key(ringid, 0, KEY_SEARCH); |
664cceb0 DH |
601 | if (IS_ERR(keyring_ref)) { |
602 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
603 | goto error2; |
604 | } | |
605 | ||
606 | /* get the destination keyring if specified */ | |
664cceb0 | 607 | dest_ref = NULL; |
1da177e4 | 608 | if (destringid) { |
5593122e DH |
609 | dest_ref = lookup_user_key(destringid, KEY_LOOKUP_CREATE, |
610 | KEY_WRITE); | |
664cceb0 DH |
611 | if (IS_ERR(dest_ref)) { |
612 | ret = PTR_ERR(dest_ref); | |
1da177e4 LT |
613 | goto error3; |
614 | } | |
615 | } | |
616 | ||
617 | /* find the key type */ | |
618 | ktype = key_type_lookup(type); | |
619 | if (IS_ERR(ktype)) { | |
620 | ret = PTR_ERR(ktype); | |
621 | goto error4; | |
622 | } | |
623 | ||
624 | /* do the search */ | |
664cceb0 DH |
625 | key_ref = keyring_search(keyring_ref, ktype, description); |
626 | if (IS_ERR(key_ref)) { | |
627 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
628 | |
629 | /* treat lack or presence of a negative key the same */ | |
630 | if (ret == -EAGAIN) | |
631 | ret = -ENOKEY; | |
632 | goto error5; | |
633 | } | |
634 | ||
635 | /* link the resulting key to the destination keyring if we can */ | |
664cceb0 | 636 | if (dest_ref) { |
29db9190 DH |
637 | ret = key_permission(key_ref, KEY_LINK); |
638 | if (ret < 0) | |
1da177e4 LT |
639 | goto error6; |
640 | ||
664cceb0 | 641 | ret = key_link(key_ref_to_ptr(dest_ref), key_ref_to_ptr(key_ref)); |
1da177e4 LT |
642 | if (ret < 0) |
643 | goto error6; | |
644 | } | |
645 | ||
664cceb0 | 646 | ret = key_ref_to_ptr(key_ref)->serial; |
1da177e4 | 647 | |
c5b60b5e | 648 | error6: |
664cceb0 | 649 | key_ref_put(key_ref); |
c5b60b5e | 650 | error5: |
1da177e4 | 651 | key_type_put(ktype); |
c5b60b5e | 652 | error4: |
664cceb0 | 653 | key_ref_put(dest_ref); |
c5b60b5e | 654 | error3: |
664cceb0 | 655 | key_ref_put(keyring_ref); |
c5b60b5e | 656 | error2: |
1da177e4 | 657 | kfree(description); |
c5b60b5e | 658 | error: |
1da177e4 | 659 | return ret; |
a8b17ed0 | 660 | } |
1da177e4 | 661 | |
1da177e4 | 662 | /* |
973c9f4f DH |
663 | * Read a key's payload. |
664 | * | |
665 | * The key must either grant the caller Read permission, or it must grant the | |
666 | * caller Search permission when searched for from the process keyrings. | |
667 | * | |
668 | * If successful, we place up to buflen bytes of data into the buffer, if one | |
669 | * is provided, and return the amount of data that is available in the key, | |
670 | * irrespective of how much we copied into the buffer. | |
1da177e4 LT |
671 | */ |
672 | long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen) | |
673 | { | |
664cceb0 DH |
674 | struct key *key; |
675 | key_ref_t key_ref; | |
1da177e4 LT |
676 | long ret; |
677 | ||
678 | /* find the key first */ | |
5593122e | 679 | key_ref = lookup_user_key(keyid, 0, 0); |
664cceb0 DH |
680 | if (IS_ERR(key_ref)) { |
681 | ret = -ENOKEY; | |
682 | goto error; | |
1da177e4 LT |
683 | } |
684 | ||
664cceb0 DH |
685 | key = key_ref_to_ptr(key_ref); |
686 | ||
687 | /* see if we can read it directly */ | |
29db9190 DH |
688 | ret = key_permission(key_ref, KEY_READ); |
689 | if (ret == 0) | |
664cceb0 | 690 | goto can_read_key; |
29db9190 DH |
691 | if (ret != -EACCES) |
692 | goto error; | |
664cceb0 DH |
693 | |
694 | /* we can't; see if it's searchable from this process's keyrings | |
695 | * - we automatically take account of the fact that it may be | |
696 | * dangling off an instantiation key | |
697 | */ | |
698 | if (!is_key_possessed(key_ref)) { | |
699 | ret = -EACCES; | |
700 | goto error2; | |
701 | } | |
1da177e4 LT |
702 | |
703 | /* the key is probably readable - now try to read it */ | |
c5b60b5e | 704 | can_read_key: |
1da177e4 LT |
705 | ret = key_validate(key); |
706 | if (ret == 0) { | |
707 | ret = -EOPNOTSUPP; | |
708 | if (key->type->read) { | |
709 | /* read the data with the semaphore held (since we | |
710 | * might sleep) */ | |
711 | down_read(&key->sem); | |
712 | ret = key->type->read(key, buffer, buflen); | |
713 | up_read(&key->sem); | |
714 | } | |
715 | } | |
716 | ||
c5b60b5e | 717 | error2: |
1da177e4 | 718 | key_put(key); |
c5b60b5e | 719 | error: |
1da177e4 | 720 | return ret; |
a8b17ed0 | 721 | } |
1da177e4 | 722 | |
1da177e4 | 723 | /* |
973c9f4f DH |
724 | * Change the ownership of a key |
725 | * | |
726 | * The key must grant the caller Setattr permission for this to work, though | |
727 | * the key need not be fully instantiated yet. For the UID to be changed, or | |
728 | * for the GID to be changed to a group the caller is not a member of, the | |
729 | * caller must have sysadmin capability. If either uid or gid is -1 then that | |
730 | * attribute is not changed. | |
731 | * | |
732 | * If the UID is to be changed, the new user must have sufficient quota to | |
733 | * accept the key. The quota deduction will be removed from the old user to | |
734 | * the new user should the attribute be changed. | |
735 | * | |
736 | * If successful, 0 will be returned. | |
1da177e4 LT |
737 | */ |
738 | long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid) | |
739 | { | |
5801649d | 740 | struct key_user *newowner, *zapowner = NULL; |
1da177e4 | 741 | struct key *key; |
664cceb0 | 742 | key_ref_t key_ref; |
1da177e4 LT |
743 | long ret; |
744 | ||
745 | ret = 0; | |
746 | if (uid == (uid_t) -1 && gid == (gid_t) -1) | |
747 | goto error; | |
748 | ||
5593122e DH |
749 | key_ref = lookup_user_key(id, KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL, |
750 | KEY_SETATTR); | |
664cceb0 DH |
751 | if (IS_ERR(key_ref)) { |
752 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
753 | goto error; |
754 | } | |
755 | ||
664cceb0 DH |
756 | key = key_ref_to_ptr(key_ref); |
757 | ||
1da177e4 LT |
758 | /* make the changes with the locks held to prevent chown/chown races */ |
759 | ret = -EACCES; | |
760 | down_write(&key->sem); | |
1da177e4 LT |
761 | |
762 | if (!capable(CAP_SYS_ADMIN)) { | |
763 | /* only the sysadmin can chown a key to some other UID */ | |
764 | if (uid != (uid_t) -1 && key->uid != uid) | |
5801649d | 765 | goto error_put; |
1da177e4 LT |
766 | |
767 | /* only the sysadmin can set the key's GID to a group other | |
768 | * than one of those that the current process subscribes to */ | |
769 | if (gid != (gid_t) -1 && gid != key->gid && !in_group_p(gid)) | |
5801649d | 770 | goto error_put; |
1da177e4 LT |
771 | } |
772 | ||
5801649d | 773 | /* change the UID */ |
1da177e4 | 774 | if (uid != (uid_t) -1 && uid != key->uid) { |
5801649d | 775 | ret = -ENOMEM; |
1d1e9756 | 776 | newowner = key_user_lookup(uid, current_user_ns()); |
5801649d FT |
777 | if (!newowner) |
778 | goto error_put; | |
779 | ||
780 | /* transfer the quota burden to the new user */ | |
781 | if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) { | |
0b77f5bf DH |
782 | unsigned maxkeys = (uid == 0) ? |
783 | key_quota_root_maxkeys : key_quota_maxkeys; | |
784 | unsigned maxbytes = (uid == 0) ? | |
785 | key_quota_root_maxbytes : key_quota_maxbytes; | |
786 | ||
5801649d | 787 | spin_lock(&newowner->lock); |
0b77f5bf DH |
788 | if (newowner->qnkeys + 1 >= maxkeys || |
789 | newowner->qnbytes + key->quotalen >= maxbytes || | |
790 | newowner->qnbytes + key->quotalen < | |
791 | newowner->qnbytes) | |
5801649d FT |
792 | goto quota_overrun; |
793 | ||
794 | newowner->qnkeys++; | |
795 | newowner->qnbytes += key->quotalen; | |
796 | spin_unlock(&newowner->lock); | |
797 | ||
798 | spin_lock(&key->user->lock); | |
799 | key->user->qnkeys--; | |
800 | key->user->qnbytes -= key->quotalen; | |
801 | spin_unlock(&key->user->lock); | |
802 | } | |
803 | ||
804 | atomic_dec(&key->user->nkeys); | |
805 | atomic_inc(&newowner->nkeys); | |
806 | ||
807 | if (test_bit(KEY_FLAG_INSTANTIATED, &key->flags)) { | |
808 | atomic_dec(&key->user->nikeys); | |
809 | atomic_inc(&newowner->nikeys); | |
810 | } | |
811 | ||
812 | zapowner = key->user; | |
813 | key->user = newowner; | |
814 | key->uid = uid; | |
1da177e4 LT |
815 | } |
816 | ||
817 | /* change the GID */ | |
818 | if (gid != (gid_t) -1) | |
819 | key->gid = gid; | |
820 | ||
821 | ret = 0; | |
822 | ||
5801649d | 823 | error_put: |
1da177e4 LT |
824 | up_write(&key->sem); |
825 | key_put(key); | |
5801649d FT |
826 | if (zapowner) |
827 | key_user_put(zapowner); | |
828 | error: | |
1da177e4 LT |
829 | return ret; |
830 | ||
5801649d FT |
831 | quota_overrun: |
832 | spin_unlock(&newowner->lock); | |
833 | zapowner = newowner; | |
834 | ret = -EDQUOT; | |
835 | goto error_put; | |
a8b17ed0 | 836 | } |
5801649d | 837 | |
1da177e4 | 838 | /* |
973c9f4f DH |
839 | * Change the permission mask on a key. |
840 | * | |
841 | * The key must grant the caller Setattr permission for this to work, though | |
842 | * the key need not be fully instantiated yet. If the caller does not have | |
843 | * sysadmin capability, it may only change the permission on keys that it owns. | |
1da177e4 LT |
844 | */ |
845 | long keyctl_setperm_key(key_serial_t id, key_perm_t perm) | |
846 | { | |
847 | struct key *key; | |
664cceb0 | 848 | key_ref_t key_ref; |
1da177e4 LT |
849 | long ret; |
850 | ||
851 | ret = -EINVAL; | |
664cceb0 | 852 | if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL)) |
1da177e4 LT |
853 | goto error; |
854 | ||
5593122e DH |
855 | key_ref = lookup_user_key(id, KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL, |
856 | KEY_SETATTR); | |
664cceb0 DH |
857 | if (IS_ERR(key_ref)) { |
858 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
859 | goto error; |
860 | } | |
861 | ||
664cceb0 DH |
862 | key = key_ref_to_ptr(key_ref); |
863 | ||
76d8aeab | 864 | /* make the changes with the locks held to prevent chown/chmod races */ |
1da177e4 LT |
865 | ret = -EACCES; |
866 | down_write(&key->sem); | |
1da177e4 | 867 | |
76d8aeab | 868 | /* if we're not the sysadmin, we can only change a key that we own */ |
47d804bf | 869 | if (capable(CAP_SYS_ADMIN) || key->uid == current_fsuid()) { |
76d8aeab DH |
870 | key->perm = perm; |
871 | ret = 0; | |
872 | } | |
1da177e4 | 873 | |
1da177e4 LT |
874 | up_write(&key->sem); |
875 | key_put(key); | |
76d8aeab | 876 | error: |
1da177e4 | 877 | return ret; |
a8b17ed0 | 878 | } |
1da177e4 | 879 | |
8bbf4976 | 880 | /* |
973c9f4f DH |
881 | * Get the destination keyring for instantiation and check that the caller has |
882 | * Write permission on it. | |
8bbf4976 DH |
883 | */ |
884 | static long get_instantiation_keyring(key_serial_t ringid, | |
885 | struct request_key_auth *rka, | |
886 | struct key **_dest_keyring) | |
887 | { | |
888 | key_ref_t dkref; | |
889 | ||
eca1bf5b DH |
890 | *_dest_keyring = NULL; |
891 | ||
8bbf4976 | 892 | /* just return a NULL pointer if we weren't asked to make a link */ |
eca1bf5b | 893 | if (ringid == 0) |
8bbf4976 | 894 | return 0; |
8bbf4976 DH |
895 | |
896 | /* if a specific keyring is nominated by ID, then use that */ | |
897 | if (ringid > 0) { | |
5593122e | 898 | dkref = lookup_user_key(ringid, KEY_LOOKUP_CREATE, KEY_WRITE); |
8bbf4976 DH |
899 | if (IS_ERR(dkref)) |
900 | return PTR_ERR(dkref); | |
901 | *_dest_keyring = key_ref_to_ptr(dkref); | |
902 | return 0; | |
903 | } | |
904 | ||
905 | if (ringid == KEY_SPEC_REQKEY_AUTH_KEY) | |
906 | return -EINVAL; | |
907 | ||
908 | /* otherwise specify the destination keyring recorded in the | |
909 | * authorisation key (any KEY_SPEC_*_KEYRING) */ | |
910 | if (ringid >= KEY_SPEC_REQUESTOR_KEYRING) { | |
21279cfa | 911 | *_dest_keyring = key_get(rka->dest_keyring); |
8bbf4976 DH |
912 | return 0; |
913 | } | |
914 | ||
915 | return -ENOKEY; | |
916 | } | |
917 | ||
d84f4f99 | 918 | /* |
973c9f4f | 919 | * Change the request_key authorisation key on the current process. |
d84f4f99 DH |
920 | */ |
921 | static int keyctl_change_reqkey_auth(struct key *key) | |
922 | { | |
923 | struct cred *new; | |
924 | ||
925 | new = prepare_creds(); | |
926 | if (!new) | |
927 | return -ENOMEM; | |
928 | ||
929 | key_put(new->request_key_auth); | |
930 | new->request_key_auth = key_get(key); | |
931 | ||
932 | return commit_creds(new); | |
933 | } | |
934 | ||
ee009e4a DH |
935 | /* |
936 | * Copy the iovec data from userspace | |
937 | */ | |
938 | static long copy_from_user_iovec(void *buffer, const struct iovec *iov, | |
939 | unsigned ioc) | |
940 | { | |
941 | for (; ioc > 0; ioc--) { | |
942 | if (copy_from_user(buffer, iov->iov_base, iov->iov_len) != 0) | |
943 | return -EFAULT; | |
944 | buffer += iov->iov_len; | |
945 | iov++; | |
946 | } | |
947 | return 0; | |
948 | } | |
949 | ||
1da177e4 | 950 | /* |
973c9f4f DH |
951 | * Instantiate a key with the specified payload and link the key into the |
952 | * destination keyring if one is given. | |
953 | * | |
954 | * The caller must have the appropriate instantiation permit set for this to | |
955 | * work (see keyctl_assume_authority). No other permissions are required. | |
956 | * | |
957 | * If successful, 0 will be returned. | |
1da177e4 | 958 | */ |
ee009e4a DH |
959 | long keyctl_instantiate_key_common(key_serial_t id, |
960 | const struct iovec *payload_iov, | |
961 | unsigned ioc, | |
962 | size_t plen, | |
963 | key_serial_t ringid) | |
1da177e4 | 964 | { |
d84f4f99 | 965 | const struct cred *cred = current_cred(); |
3e30148c | 966 | struct request_key_auth *rka; |
8bbf4976 | 967 | struct key *instkey, *dest_keyring; |
1da177e4 LT |
968 | void *payload; |
969 | long ret; | |
38bbca6b | 970 | bool vm = false; |
1da177e4 | 971 | |
d84f4f99 DH |
972 | kenter("%d,,%zu,%d", id, plen, ringid); |
973 | ||
1da177e4 | 974 | ret = -EINVAL; |
38bbca6b | 975 | if (plen > 1024 * 1024 - 1) |
1da177e4 LT |
976 | goto error; |
977 | ||
b5f545c8 DH |
978 | /* the appropriate instantiation authorisation key must have been |
979 | * assumed before calling this */ | |
980 | ret = -EPERM; | |
d84f4f99 | 981 | instkey = cred->request_key_auth; |
b5f545c8 DH |
982 | if (!instkey) |
983 | goto error; | |
984 | ||
985 | rka = instkey->payload.data; | |
986 | if (rka->target_key->serial != id) | |
987 | goto error; | |
988 | ||
1da177e4 LT |
989 | /* pull the payload in if one was supplied */ |
990 | payload = NULL; | |
991 | ||
ee009e4a | 992 | if (payload_iov) { |
1da177e4 LT |
993 | ret = -ENOMEM; |
994 | payload = kmalloc(plen, GFP_KERNEL); | |
38bbca6b DH |
995 | if (!payload) { |
996 | if (plen <= PAGE_SIZE) | |
997 | goto error; | |
998 | vm = true; | |
999 | payload = vmalloc(plen); | |
1000 | if (!payload) | |
1001 | goto error; | |
1002 | } | |
1da177e4 | 1003 | |
ee009e4a DH |
1004 | ret = copy_from_user_iovec(payload, payload_iov, ioc); |
1005 | if (ret < 0) | |
1da177e4 LT |
1006 | goto error2; |
1007 | } | |
1008 | ||
3e30148c DH |
1009 | /* find the destination keyring amongst those belonging to the |
1010 | * requesting task */ | |
8bbf4976 DH |
1011 | ret = get_instantiation_keyring(ringid, rka, &dest_keyring); |
1012 | if (ret < 0) | |
1013 | goto error2; | |
1da177e4 LT |
1014 | |
1015 | /* instantiate the key and link it into a keyring */ | |
3e30148c | 1016 | ret = key_instantiate_and_link(rka->target_key, payload, plen, |
8bbf4976 | 1017 | dest_keyring, instkey); |
1da177e4 | 1018 | |
8bbf4976 | 1019 | key_put(dest_keyring); |
b5f545c8 DH |
1020 | |
1021 | /* discard the assumed authority if it's just been disabled by | |
1022 | * instantiation of the key */ | |
d84f4f99 DH |
1023 | if (ret == 0) |
1024 | keyctl_change_reqkey_auth(NULL); | |
b5f545c8 DH |
1025 | |
1026 | error2: | |
38bbca6b DH |
1027 | if (!vm) |
1028 | kfree(payload); | |
1029 | else | |
1030 | vfree(payload); | |
b5f545c8 | 1031 | error: |
1da177e4 | 1032 | return ret; |
a8b17ed0 | 1033 | } |
1da177e4 | 1034 | |
ee009e4a DH |
1035 | /* |
1036 | * Instantiate a key with the specified payload and link the key into the | |
1037 | * destination keyring if one is given. | |
1038 | * | |
1039 | * The caller must have the appropriate instantiation permit set for this to | |
1040 | * work (see keyctl_assume_authority). No other permissions are required. | |
1041 | * | |
1042 | * If successful, 0 will be returned. | |
1043 | */ | |
1044 | long keyctl_instantiate_key(key_serial_t id, | |
1045 | const void __user *_payload, | |
1046 | size_t plen, | |
1047 | key_serial_t ringid) | |
1048 | { | |
1049 | if (_payload && plen) { | |
1050 | struct iovec iov[1] = { | |
1051 | [0].iov_base = (void __user *)_payload, | |
1052 | [0].iov_len = plen | |
1053 | }; | |
1054 | ||
1055 | return keyctl_instantiate_key_common(id, iov, 1, plen, ringid); | |
1056 | } | |
1057 | ||
1058 | return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid); | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * Instantiate a key with the specified multipart payload and link the key into | |
1063 | * the destination keyring if one is given. | |
1064 | * | |
1065 | * The caller must have the appropriate instantiation permit set for this to | |
1066 | * work (see keyctl_assume_authority). No other permissions are required. | |
1067 | * | |
1068 | * If successful, 0 will be returned. | |
1069 | */ | |
1070 | long keyctl_instantiate_key_iov(key_serial_t id, | |
1071 | const struct iovec __user *_payload_iov, | |
1072 | unsigned ioc, | |
1073 | key_serial_t ringid) | |
1074 | { | |
1075 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; | |
1076 | long ret; | |
1077 | ||
1078 | if (_payload_iov == 0 || ioc == 0) | |
1079 | goto no_payload; | |
1080 | ||
1081 | ret = rw_copy_check_uvector(WRITE, _payload_iov, ioc, | |
fcf63409 | 1082 | ARRAY_SIZE(iovstack), iovstack, &iov, 1); |
ee009e4a DH |
1083 | if (ret < 0) |
1084 | return ret; | |
1085 | if (ret == 0) | |
1086 | goto no_payload_free; | |
1087 | ||
1088 | ret = keyctl_instantiate_key_common(id, iov, ioc, ret, ringid); | |
1089 | ||
1090 | if (iov != iovstack) | |
1091 | kfree(iov); | |
1092 | return ret; | |
1093 | ||
1094 | no_payload_free: | |
1095 | if (iov != iovstack) | |
1096 | kfree(iov); | |
1097 | no_payload: | |
1098 | return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid); | |
1099 | } | |
1100 | ||
1da177e4 | 1101 | /* |
973c9f4f DH |
1102 | * Negatively instantiate the key with the given timeout (in seconds) and link |
1103 | * the key into the destination keyring if one is given. | |
1104 | * | |
1105 | * The caller must have the appropriate instantiation permit set for this to | |
1106 | * work (see keyctl_assume_authority). No other permissions are required. | |
1107 | * | |
1108 | * The key and any links to the key will be automatically garbage collected | |
1109 | * after the timeout expires. | |
1110 | * | |
1111 | * Negative keys are used to rate limit repeated request_key() calls by causing | |
1112 | * them to return -ENOKEY until the negative key expires. | |
1113 | * | |
1114 | * If successful, 0 will be returned. | |
1da177e4 LT |
1115 | */ |
1116 | long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid) | |
fdd1b945 DH |
1117 | { |
1118 | return keyctl_reject_key(id, timeout, ENOKEY, ringid); | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * Negatively instantiate the key with the given timeout (in seconds) and error | |
1123 | * code and link the key into the destination keyring if one is given. | |
1124 | * | |
1125 | * The caller must have the appropriate instantiation permit set for this to | |
1126 | * work (see keyctl_assume_authority). No other permissions are required. | |
1127 | * | |
1128 | * The key and any links to the key will be automatically garbage collected | |
1129 | * after the timeout expires. | |
1130 | * | |
1131 | * Negative keys are used to rate limit repeated request_key() calls by causing | |
1132 | * them to return the specified error code until the negative key expires. | |
1133 | * | |
1134 | * If successful, 0 will be returned. | |
1135 | */ | |
1136 | long keyctl_reject_key(key_serial_t id, unsigned timeout, unsigned error, | |
1137 | key_serial_t ringid) | |
1da177e4 | 1138 | { |
d84f4f99 | 1139 | const struct cred *cred = current_cred(); |
3e30148c | 1140 | struct request_key_auth *rka; |
8bbf4976 | 1141 | struct key *instkey, *dest_keyring; |
1da177e4 LT |
1142 | long ret; |
1143 | ||
fdd1b945 DH |
1144 | kenter("%d,%u,%u,%d", id, timeout, error, ringid); |
1145 | ||
1146 | /* must be a valid error code and mustn't be a kernel special */ | |
1147 | if (error <= 0 || | |
1148 | error >= MAX_ERRNO || | |
1149 | error == ERESTARTSYS || | |
1150 | error == ERESTARTNOINTR || | |
1151 | error == ERESTARTNOHAND || | |
1152 | error == ERESTART_RESTARTBLOCK) | |
1153 | return -EINVAL; | |
d84f4f99 | 1154 | |
b5f545c8 DH |
1155 | /* the appropriate instantiation authorisation key must have been |
1156 | * assumed before calling this */ | |
1157 | ret = -EPERM; | |
d84f4f99 | 1158 | instkey = cred->request_key_auth; |
b5f545c8 | 1159 | if (!instkey) |
1da177e4 | 1160 | goto error; |
1da177e4 | 1161 | |
3e30148c | 1162 | rka = instkey->payload.data; |
b5f545c8 DH |
1163 | if (rka->target_key->serial != id) |
1164 | goto error; | |
3e30148c | 1165 | |
1da177e4 LT |
1166 | /* find the destination keyring if present (which must also be |
1167 | * writable) */ | |
8bbf4976 DH |
1168 | ret = get_instantiation_keyring(ringid, rka, &dest_keyring); |
1169 | if (ret < 0) | |
1170 | goto error; | |
1da177e4 LT |
1171 | |
1172 | /* instantiate the key and link it into a keyring */ | |
fdd1b945 | 1173 | ret = key_reject_and_link(rka->target_key, timeout, error, |
8bbf4976 | 1174 | dest_keyring, instkey); |
1da177e4 | 1175 | |
8bbf4976 | 1176 | key_put(dest_keyring); |
b5f545c8 DH |
1177 | |
1178 | /* discard the assumed authority if it's just been disabled by | |
1179 | * instantiation of the key */ | |
d84f4f99 DH |
1180 | if (ret == 0) |
1181 | keyctl_change_reqkey_auth(NULL); | |
b5f545c8 DH |
1182 | |
1183 | error: | |
1da177e4 | 1184 | return ret; |
a8b17ed0 | 1185 | } |
1da177e4 | 1186 | |
3e30148c | 1187 | /* |
973c9f4f DH |
1188 | * Read or set the default keyring in which request_key() will cache keys and |
1189 | * return the old setting. | |
1190 | * | |
1191 | * If a process keyring is specified then this will be created if it doesn't | |
1192 | * yet exist. The old setting will be returned if successful. | |
3e30148c DH |
1193 | */ |
1194 | long keyctl_set_reqkey_keyring(int reqkey_defl) | |
1195 | { | |
d84f4f99 DH |
1196 | struct cred *new; |
1197 | int ret, old_setting; | |
1198 | ||
1199 | old_setting = current_cred_xxx(jit_keyring); | |
1200 | ||
1201 | if (reqkey_defl == KEY_REQKEY_DEFL_NO_CHANGE) | |
1202 | return old_setting; | |
1203 | ||
1204 | new = prepare_creds(); | |
1205 | if (!new) | |
1206 | return -ENOMEM; | |
3e30148c DH |
1207 | |
1208 | switch (reqkey_defl) { | |
1209 | case KEY_REQKEY_DEFL_THREAD_KEYRING: | |
d84f4f99 | 1210 | ret = install_thread_keyring_to_cred(new); |
3e30148c | 1211 | if (ret < 0) |
d84f4f99 | 1212 | goto error; |
3e30148c DH |
1213 | goto set; |
1214 | ||
1215 | case KEY_REQKEY_DEFL_PROCESS_KEYRING: | |
d84f4f99 DH |
1216 | ret = install_process_keyring_to_cred(new); |
1217 | if (ret < 0) { | |
1218 | if (ret != -EEXIST) | |
1219 | goto error; | |
1220 | ret = 0; | |
1221 | } | |
1222 | goto set; | |
3e30148c DH |
1223 | |
1224 | case KEY_REQKEY_DEFL_DEFAULT: | |
1225 | case KEY_REQKEY_DEFL_SESSION_KEYRING: | |
1226 | case KEY_REQKEY_DEFL_USER_KEYRING: | |
1227 | case KEY_REQKEY_DEFL_USER_SESSION_KEYRING: | |
d84f4f99 DH |
1228 | case KEY_REQKEY_DEFL_REQUESTOR_KEYRING: |
1229 | goto set; | |
3e30148c DH |
1230 | |
1231 | case KEY_REQKEY_DEFL_NO_CHANGE: | |
3e30148c DH |
1232 | case KEY_REQKEY_DEFL_GROUP_KEYRING: |
1233 | default: | |
d84f4f99 DH |
1234 | ret = -EINVAL; |
1235 | goto error; | |
3e30148c DH |
1236 | } |
1237 | ||
d84f4f99 DH |
1238 | set: |
1239 | new->jit_keyring = reqkey_defl; | |
1240 | commit_creds(new); | |
1241 | return old_setting; | |
1242 | error: | |
1243 | abort_creds(new); | |
4303ef19 | 1244 | return ret; |
a8b17ed0 | 1245 | } |
d84f4f99 | 1246 | |
017679c4 | 1247 | /* |
973c9f4f DH |
1248 | * Set or clear the timeout on a key. |
1249 | * | |
1250 | * Either the key must grant the caller Setattr permission or else the caller | |
1251 | * must hold an instantiation authorisation token for the key. | |
1252 | * | |
1253 | * The timeout is either 0 to clear the timeout, or a number of seconds from | |
1254 | * the current time. The key and any links to the key will be automatically | |
1255 | * garbage collected after the timeout expires. | |
1256 | * | |
1257 | * If successful, 0 is returned. | |
017679c4 DH |
1258 | */ |
1259 | long keyctl_set_timeout(key_serial_t id, unsigned timeout) | |
1260 | { | |
9156235b | 1261 | struct key *key, *instkey; |
017679c4 | 1262 | key_ref_t key_ref; |
017679c4 DH |
1263 | long ret; |
1264 | ||
5593122e DH |
1265 | key_ref = lookup_user_key(id, KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL, |
1266 | KEY_SETATTR); | |
017679c4 | 1267 | if (IS_ERR(key_ref)) { |
9156235b DH |
1268 | /* setting the timeout on a key under construction is permitted |
1269 | * if we have the authorisation token handy */ | |
1270 | if (PTR_ERR(key_ref) == -EACCES) { | |
1271 | instkey = key_get_instantiation_authkey(id); | |
1272 | if (!IS_ERR(instkey)) { | |
1273 | key_put(instkey); | |
1274 | key_ref = lookup_user_key(id, | |
1275 | KEY_LOOKUP_PARTIAL, | |
1276 | 0); | |
1277 | if (!IS_ERR(key_ref)) | |
1278 | goto okay; | |
1279 | } | |
1280 | } | |
1281 | ||
017679c4 DH |
1282 | ret = PTR_ERR(key_ref); |
1283 | goto error; | |
1284 | } | |
1285 | ||
9156235b | 1286 | okay: |
017679c4 | 1287 | key = key_ref_to_ptr(key_ref); |
59e6b9c1 | 1288 | key_set_timeout(key, timeout); |
017679c4 DH |
1289 | key_put(key); |
1290 | ||
1291 | ret = 0; | |
1292 | error: | |
1293 | return ret; | |
a8b17ed0 | 1294 | } |
017679c4 | 1295 | |
b5f545c8 | 1296 | /* |
973c9f4f DH |
1297 | * Assume (or clear) the authority to instantiate the specified key. |
1298 | * | |
1299 | * This sets the authoritative token currently in force for key instantiation. | |
1300 | * This must be done for a key to be instantiated. It has the effect of making | |
1301 | * available all the keys from the caller of the request_key() that created a | |
1302 | * key to request_key() calls made by the caller of this function. | |
1303 | * | |
1304 | * The caller must have the instantiation key in their process keyrings with a | |
1305 | * Search permission grant available to the caller. | |
1306 | * | |
1307 | * If the ID given is 0, then the setting will be cleared and 0 returned. | |
1308 | * | |
1309 | * If the ID given has a matching an authorisation key, then that key will be | |
1310 | * set and its ID will be returned. The authorisation key can be read to get | |
1311 | * the callout information passed to request_key(). | |
b5f545c8 DH |
1312 | */ |
1313 | long keyctl_assume_authority(key_serial_t id) | |
1314 | { | |
1315 | struct key *authkey; | |
1316 | long ret; | |
1317 | ||
1318 | /* special key IDs aren't permitted */ | |
1319 | ret = -EINVAL; | |
1320 | if (id < 0) | |
1321 | goto error; | |
1322 | ||
1323 | /* we divest ourselves of authority if given an ID of 0 */ | |
1324 | if (id == 0) { | |
d84f4f99 | 1325 | ret = keyctl_change_reqkey_auth(NULL); |
b5f545c8 DH |
1326 | goto error; |
1327 | } | |
1328 | ||
1329 | /* attempt to assume the authority temporarily granted to us whilst we | |
1330 | * instantiate the specified key | |
1331 | * - the authorisation key must be in the current task's keyrings | |
1332 | * somewhere | |
1333 | */ | |
1334 | authkey = key_get_instantiation_authkey(id); | |
1335 | if (IS_ERR(authkey)) { | |
1336 | ret = PTR_ERR(authkey); | |
1337 | goto error; | |
1338 | } | |
1339 | ||
d84f4f99 DH |
1340 | ret = keyctl_change_reqkey_auth(authkey); |
1341 | if (ret < 0) | |
1342 | goto error; | |
1343 | key_put(authkey); | |
b5f545c8 | 1344 | |
d84f4f99 | 1345 | ret = authkey->serial; |
b5f545c8 DH |
1346 | error: |
1347 | return ret; | |
a8b17ed0 | 1348 | } |
b5f545c8 | 1349 | |
70a5bb72 | 1350 | /* |
973c9f4f DH |
1351 | * Get a key's the LSM security label. |
1352 | * | |
1353 | * The key must grant the caller View permission for this to work. | |
1354 | * | |
1355 | * If there's a buffer, then up to buflen bytes of data will be placed into it. | |
1356 | * | |
1357 | * If successful, the amount of information available will be returned, | |
1358 | * irrespective of how much was copied (including the terminal NUL). | |
70a5bb72 DH |
1359 | */ |
1360 | long keyctl_get_security(key_serial_t keyid, | |
1361 | char __user *buffer, | |
1362 | size_t buflen) | |
1363 | { | |
1364 | struct key *key, *instkey; | |
1365 | key_ref_t key_ref; | |
1366 | char *context; | |
1367 | long ret; | |
1368 | ||
5593122e | 1369 | key_ref = lookup_user_key(keyid, KEY_LOOKUP_PARTIAL, KEY_VIEW); |
70a5bb72 DH |
1370 | if (IS_ERR(key_ref)) { |
1371 | if (PTR_ERR(key_ref) != -EACCES) | |
1372 | return PTR_ERR(key_ref); | |
1373 | ||
1374 | /* viewing a key under construction is also permitted if we | |
1375 | * have the authorisation token handy */ | |
1376 | instkey = key_get_instantiation_authkey(keyid); | |
1377 | if (IS_ERR(instkey)) | |
fa1cc7b5 | 1378 | return PTR_ERR(instkey); |
70a5bb72 DH |
1379 | key_put(instkey); |
1380 | ||
5593122e | 1381 | key_ref = lookup_user_key(keyid, KEY_LOOKUP_PARTIAL, 0); |
70a5bb72 DH |
1382 | if (IS_ERR(key_ref)) |
1383 | return PTR_ERR(key_ref); | |
1384 | } | |
1385 | ||
1386 | key = key_ref_to_ptr(key_ref); | |
1387 | ret = security_key_getsecurity(key, &context); | |
1388 | if (ret == 0) { | |
1389 | /* if no information was returned, give userspace an empty | |
1390 | * string */ | |
1391 | ret = 1; | |
1392 | if (buffer && buflen > 0 && | |
1393 | copy_to_user(buffer, "", 1) != 0) | |
1394 | ret = -EFAULT; | |
1395 | } else if (ret > 0) { | |
1396 | /* return as much data as there's room for */ | |
1397 | if (buffer && buflen > 0) { | |
1398 | if (buflen > ret) | |
1399 | buflen = ret; | |
1400 | ||
1401 | if (copy_to_user(buffer, context, buflen) != 0) | |
1402 | ret = -EFAULT; | |
1403 | } | |
1404 | ||
1405 | kfree(context); | |
1406 | } | |
1407 | ||
1408 | key_ref_put(key_ref); | |
1409 | return ret; | |
1410 | } | |
1411 | ||
ee18d64c | 1412 | /* |
973c9f4f DH |
1413 | * Attempt to install the calling process's session keyring on the process's |
1414 | * parent process. | |
1415 | * | |
1416 | * The keyring must exist and must grant the caller LINK permission, and the | |
1417 | * parent process must be single-threaded and must have the same effective | |
1418 | * ownership as this process and mustn't be SUID/SGID. | |
1419 | * | |
1420 | * The keyring will be emplaced on the parent when it next resumes userspace. | |
1421 | * | |
1422 | * If successful, 0 will be returned. | |
ee18d64c DH |
1423 | */ |
1424 | long keyctl_session_to_parent(void) | |
1425 | { | |
a00ae4d2 | 1426 | #ifdef TIF_NOTIFY_RESUME |
ee18d64c DH |
1427 | struct task_struct *me, *parent; |
1428 | const struct cred *mycred, *pcred; | |
1429 | struct cred *cred, *oldcred; | |
1430 | key_ref_t keyring_r; | |
1431 | int ret; | |
1432 | ||
1433 | keyring_r = lookup_user_key(KEY_SPEC_SESSION_KEYRING, 0, KEY_LINK); | |
1434 | if (IS_ERR(keyring_r)) | |
1435 | return PTR_ERR(keyring_r); | |
1436 | ||
1437 | /* our parent is going to need a new cred struct, a new tgcred struct | |
1438 | * and new security data, so we allocate them here to prevent ENOMEM in | |
1439 | * our parent */ | |
1440 | ret = -ENOMEM; | |
1441 | cred = cred_alloc_blank(); | |
1442 | if (!cred) | |
1443 | goto error_keyring; | |
1444 | ||
1445 | cred->tgcred->session_keyring = key_ref_to_ptr(keyring_r); | |
1446 | keyring_r = NULL; | |
1447 | ||
1448 | me = current; | |
9d1ac65a | 1449 | rcu_read_lock(); |
ee18d64c DH |
1450 | write_lock_irq(&tasklist_lock); |
1451 | ||
1452 | parent = me->real_parent; | |
1453 | ret = -EPERM; | |
1454 | ||
1455 | /* the parent mustn't be init and mustn't be a kernel thread */ | |
1456 | if (parent->pid <= 1 || !parent->mm) | |
1457 | goto not_permitted; | |
1458 | ||
1459 | /* the parent must be single threaded */ | |
dd98acf7 | 1460 | if (!thread_group_empty(parent)) |
ee18d64c DH |
1461 | goto not_permitted; |
1462 | ||
1463 | /* the parent and the child must have different session keyrings or | |
1464 | * there's no point */ | |
1465 | mycred = current_cred(); | |
1466 | pcred = __task_cred(parent); | |
1467 | if (mycred == pcred || | |
1468 | mycred->tgcred->session_keyring == pcred->tgcred->session_keyring) | |
1469 | goto already_same; | |
1470 | ||
1471 | /* the parent must have the same effective ownership and mustn't be | |
1472 | * SUID/SGID */ | |
c5b60b5e | 1473 | if (pcred->uid != mycred->euid || |
ee18d64c DH |
1474 | pcred->euid != mycred->euid || |
1475 | pcred->suid != mycred->euid || | |
c5b60b5e | 1476 | pcred->gid != mycred->egid || |
ee18d64c DH |
1477 | pcred->egid != mycred->egid || |
1478 | pcred->sgid != mycred->egid) | |
1479 | goto not_permitted; | |
1480 | ||
1481 | /* the keyrings must have the same UID */ | |
3d96406c DH |
1482 | if ((pcred->tgcred->session_keyring && |
1483 | pcred->tgcred->session_keyring->uid != mycred->euid) || | |
ee18d64c DH |
1484 | mycred->tgcred->session_keyring->uid != mycred->euid) |
1485 | goto not_permitted; | |
1486 | ||
ee18d64c DH |
1487 | /* if there's an already pending keyring replacement, then we replace |
1488 | * that */ | |
1489 | oldcred = parent->replacement_session_keyring; | |
1490 | ||
1491 | /* the replacement session keyring is applied just prior to userspace | |
1492 | * restarting */ | |
1493 | parent->replacement_session_keyring = cred; | |
1494 | cred = NULL; | |
1495 | set_ti_thread_flag(task_thread_info(parent), TIF_NOTIFY_RESUME); | |
1496 | ||
1497 | write_unlock_irq(&tasklist_lock); | |
9d1ac65a | 1498 | rcu_read_unlock(); |
ee18d64c DH |
1499 | if (oldcred) |
1500 | put_cred(oldcred); | |
1501 | return 0; | |
1502 | ||
1503 | already_same: | |
1504 | ret = 0; | |
1505 | not_permitted: | |
5c84342a | 1506 | write_unlock_irq(&tasklist_lock); |
9d1ac65a | 1507 | rcu_read_unlock(); |
ee18d64c DH |
1508 | put_cred(cred); |
1509 | return ret; | |
1510 | ||
1511 | error_keyring: | |
1512 | key_ref_put(keyring_r); | |
1513 | return ret; | |
a00ae4d2 GU |
1514 | |
1515 | #else /* !TIF_NOTIFY_RESUME */ | |
1516 | /* | |
1517 | * To be removed when TIF_NOTIFY_RESUME has been implemented on | |
1518 | * m68k/xtensa | |
1519 | */ | |
1520 | #warning TIF_NOTIFY_RESUME not implemented | |
1521 | return -EOPNOTSUPP; | |
1522 | #endif /* !TIF_NOTIFY_RESUME */ | |
ee18d64c DH |
1523 | } |
1524 | ||
1da177e4 | 1525 | /* |
973c9f4f | 1526 | * The key control system call |
1da177e4 | 1527 | */ |
938bb9f5 HC |
1528 | SYSCALL_DEFINE5(keyctl, int, option, unsigned long, arg2, unsigned long, arg3, |
1529 | unsigned long, arg4, unsigned long, arg5) | |
1da177e4 LT |
1530 | { |
1531 | switch (option) { | |
1532 | case KEYCTL_GET_KEYRING_ID: | |
1533 | return keyctl_get_keyring_ID((key_serial_t) arg2, | |
1534 | (int) arg3); | |
1535 | ||
1536 | case KEYCTL_JOIN_SESSION_KEYRING: | |
1537 | return keyctl_join_session_keyring((const char __user *) arg2); | |
1538 | ||
1539 | case KEYCTL_UPDATE: | |
1540 | return keyctl_update_key((key_serial_t) arg2, | |
1541 | (const void __user *) arg3, | |
1542 | (size_t) arg4); | |
1543 | ||
1544 | case KEYCTL_REVOKE: | |
1545 | return keyctl_revoke_key((key_serial_t) arg2); | |
1546 | ||
1547 | case KEYCTL_DESCRIBE: | |
1548 | return keyctl_describe_key((key_serial_t) arg2, | |
1549 | (char __user *) arg3, | |
1550 | (unsigned) arg4); | |
1551 | ||
1552 | case KEYCTL_CLEAR: | |
1553 | return keyctl_keyring_clear((key_serial_t) arg2); | |
1554 | ||
1555 | case KEYCTL_LINK: | |
1556 | return keyctl_keyring_link((key_serial_t) arg2, | |
1557 | (key_serial_t) arg3); | |
1558 | ||
1559 | case KEYCTL_UNLINK: | |
1560 | return keyctl_keyring_unlink((key_serial_t) arg2, | |
1561 | (key_serial_t) arg3); | |
1562 | ||
1563 | case KEYCTL_SEARCH: | |
1564 | return keyctl_keyring_search((key_serial_t) arg2, | |
1565 | (const char __user *) arg3, | |
1566 | (const char __user *) arg4, | |
1567 | (key_serial_t) arg5); | |
1568 | ||
1569 | case KEYCTL_READ: | |
1570 | return keyctl_read_key((key_serial_t) arg2, | |
1571 | (char __user *) arg3, | |
1572 | (size_t) arg4); | |
1573 | ||
1574 | case KEYCTL_CHOWN: | |
1575 | return keyctl_chown_key((key_serial_t) arg2, | |
1576 | (uid_t) arg3, | |
1577 | (gid_t) arg4); | |
1578 | ||
1579 | case KEYCTL_SETPERM: | |
1580 | return keyctl_setperm_key((key_serial_t) arg2, | |
1581 | (key_perm_t) arg3); | |
1582 | ||
1583 | case KEYCTL_INSTANTIATE: | |
1584 | return keyctl_instantiate_key((key_serial_t) arg2, | |
1585 | (const void __user *) arg3, | |
1586 | (size_t) arg4, | |
1587 | (key_serial_t) arg5); | |
1588 | ||
1589 | case KEYCTL_NEGATE: | |
1590 | return keyctl_negate_key((key_serial_t) arg2, | |
1591 | (unsigned) arg3, | |
1592 | (key_serial_t) arg4); | |
1593 | ||
3e30148c DH |
1594 | case KEYCTL_SET_REQKEY_KEYRING: |
1595 | return keyctl_set_reqkey_keyring(arg2); | |
1596 | ||
017679c4 DH |
1597 | case KEYCTL_SET_TIMEOUT: |
1598 | return keyctl_set_timeout((key_serial_t) arg2, | |
1599 | (unsigned) arg3); | |
1600 | ||
b5f545c8 DH |
1601 | case KEYCTL_ASSUME_AUTHORITY: |
1602 | return keyctl_assume_authority((key_serial_t) arg2); | |
1603 | ||
70a5bb72 DH |
1604 | case KEYCTL_GET_SECURITY: |
1605 | return keyctl_get_security((key_serial_t) arg2, | |
90bd49ab | 1606 | (char __user *) arg3, |
70a5bb72 DH |
1607 | (size_t) arg4); |
1608 | ||
ee18d64c DH |
1609 | case KEYCTL_SESSION_TO_PARENT: |
1610 | return keyctl_session_to_parent(); | |
1611 | ||
fdd1b945 DH |
1612 | case KEYCTL_REJECT: |
1613 | return keyctl_reject_key((key_serial_t) arg2, | |
1614 | (unsigned) arg3, | |
1615 | (unsigned) arg4, | |
1616 | (key_serial_t) arg5); | |
1617 | ||
ee009e4a DH |
1618 | case KEYCTL_INSTANTIATE_IOV: |
1619 | return keyctl_instantiate_key_iov( | |
1620 | (key_serial_t) arg2, | |
1621 | (const struct iovec __user *) arg3, | |
1622 | (unsigned) arg4, | |
1623 | (key_serial_t) arg5); | |
1624 | ||
1da177e4 LT |
1625 | default: |
1626 | return -EOPNOTSUPP; | |
1627 | } | |
a8b17ed0 | 1628 | } |