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1da177e4 LT |
1 | /* keyctl.c: userspace keyctl operations |
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> | |
17 | #include <linux/keyctl.h> | |
18 | #include <linux/fs.h> | |
c59ede7b | 19 | #include <linux/capability.h> |
0cb409d9 | 20 | #include <linux/string.h> |
1da177e4 | 21 | #include <linux/err.h> |
38bbca6b | 22 | #include <linux/vmalloc.h> |
1da177e4 LT |
23 | #include <asm/uaccess.h> |
24 | #include "internal.h" | |
25 | ||
0cb409d9 DA |
26 | static int key_get_type_from_user(char *type, |
27 | const char __user *_type, | |
28 | unsigned len) | |
29 | { | |
30 | int ret; | |
31 | ||
32 | ret = strncpy_from_user(type, _type, len); | |
33 | ||
34 | if (ret < 0) | |
35 | return -EFAULT; | |
36 | ||
37 | if (ret == 0 || ret >= len) | |
38 | return -EINVAL; | |
39 | ||
40 | if (type[0] == '.') | |
41 | return -EPERM; | |
42 | ||
43 | type[len - 1] = '\0'; | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
1da177e4 LT |
48 | /*****************************************************************************/ |
49 | /* | |
50 | * extract the description of a new key from userspace and either add it as a | |
51 | * new key to the specified keyring or update a matching key in that keyring | |
52 | * - the keyring must be writable | |
53 | * - returns the new key's serial number | |
54 | * - implements add_key() | |
55 | */ | |
56 | asmlinkage long sys_add_key(const char __user *_type, | |
57 | const char __user *_description, | |
58 | const void __user *_payload, | |
59 | size_t plen, | |
60 | key_serial_t ringid) | |
61 | { | |
664cceb0 | 62 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
63 | char type[32], *description; |
64 | void *payload; | |
0cb409d9 | 65 | long ret; |
38bbca6b | 66 | bool vm; |
1da177e4 LT |
67 | |
68 | ret = -EINVAL; | |
38bbca6b | 69 | if (plen > 1024 * 1024 - 1) |
1da177e4 LT |
70 | goto error; |
71 | ||
72 | /* draw all the data into kernel space */ | |
0cb409d9 | 73 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
74 | if (ret < 0) |
75 | goto error; | |
1da177e4 | 76 | |
0cb409d9 DA |
77 | description = strndup_user(_description, PAGE_SIZE); |
78 | if (IS_ERR(description)) { | |
79 | ret = PTR_ERR(description); | |
1da177e4 | 80 | goto error; |
0cb409d9 | 81 | } |
1da177e4 LT |
82 | |
83 | /* pull the payload in if one was supplied */ | |
84 | payload = NULL; | |
85 | ||
38bbca6b | 86 | vm = false; |
1da177e4 LT |
87 | if (_payload) { |
88 | ret = -ENOMEM; | |
89 | payload = kmalloc(plen, GFP_KERNEL); | |
38bbca6b DH |
90 | if (!payload) { |
91 | if (plen <= PAGE_SIZE) | |
92 | goto error2; | |
93 | vm = true; | |
94 | payload = vmalloc(plen); | |
95 | if (!payload) | |
96 | goto error2; | |
97 | } | |
1da177e4 LT |
98 | |
99 | ret = -EFAULT; | |
100 | if (copy_from_user(payload, _payload, plen) != 0) | |
101 | goto error3; | |
102 | } | |
103 | ||
104 | /* find the target keyring (which must be writable) */ | |
664cceb0 DH |
105 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
106 | if (IS_ERR(keyring_ref)) { | |
107 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
108 | goto error3; |
109 | } | |
110 | ||
111 | /* create or update the requested key and add it to the target | |
112 | * keyring */ | |
664cceb0 | 113 | key_ref = key_create_or_update(keyring_ref, type, description, |
7e047ef5 | 114 | payload, plen, KEY_ALLOC_IN_QUOTA); |
664cceb0 DH |
115 | if (!IS_ERR(key_ref)) { |
116 | ret = key_ref_to_ptr(key_ref)->serial; | |
117 | key_ref_put(key_ref); | |
1da177e4 LT |
118 | } |
119 | else { | |
664cceb0 | 120 | ret = PTR_ERR(key_ref); |
1da177e4 LT |
121 | } |
122 | ||
664cceb0 | 123 | key_ref_put(keyring_ref); |
1da177e4 | 124 | error3: |
38bbca6b DH |
125 | if (!vm) |
126 | kfree(payload); | |
127 | else | |
128 | vfree(payload); | |
1da177e4 LT |
129 | error2: |
130 | kfree(description); | |
131 | error: | |
132 | return ret; | |
133 | ||
134 | } /* end sys_add_key() */ | |
135 | ||
136 | /*****************************************************************************/ | |
137 | /* | |
138 | * search the process keyrings for a matching key | |
139 | * - nested keyrings may also be searched if they have Search permission | |
140 | * - if a key is found, it will be attached to the destination keyring if | |
141 | * there's one specified | |
142 | * - /sbin/request-key will be invoked if _callout_info is non-NULL | |
143 | * - the _callout_info string will be passed to /sbin/request-key | |
144 | * - if the _callout_info string is empty, it will be rendered as "-" | |
145 | * - implements request_key() | |
146 | */ | |
147 | asmlinkage long sys_request_key(const char __user *_type, | |
148 | const char __user *_description, | |
149 | const char __user *_callout_info, | |
150 | key_serial_t destringid) | |
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) { |
664cceb0 DH |
186 | dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE); |
187 | if (IS_ERR(dest_ref)) { | |
188 | ret = PTR_ERR(dest_ref); | |
1da177e4 LT |
189 | goto error3; |
190 | } | |
191 | } | |
192 | ||
193 | /* find the key type */ | |
194 | ktype = key_type_lookup(type); | |
195 | if (IS_ERR(ktype)) { | |
196 | ret = PTR_ERR(ktype); | |
197 | goto error4; | |
198 | } | |
199 | ||
200 | /* do the search */ | |
4a38e122 DH |
201 | key = request_key_and_link(ktype, description, callout_info, |
202 | callout_len, NULL, key_ref_to_ptr(dest_ref), | |
7e047ef5 | 203 | KEY_ALLOC_IN_QUOTA); |
1da177e4 LT |
204 | if (IS_ERR(key)) { |
205 | ret = PTR_ERR(key); | |
206 | goto error5; | |
207 | } | |
208 | ||
1da177e4 LT |
209 | ret = key->serial; |
210 | ||
3e30148c | 211 | key_put(key); |
1da177e4 LT |
212 | error5: |
213 | key_type_put(ktype); | |
214 | error4: | |
664cceb0 | 215 | key_ref_put(dest_ref); |
1da177e4 LT |
216 | error3: |
217 | kfree(callout_info); | |
218 | error2: | |
219 | kfree(description); | |
220 | error: | |
221 | return ret; | |
222 | ||
223 | } /* end sys_request_key() */ | |
224 | ||
225 | /*****************************************************************************/ | |
226 | /* | |
227 | * get the ID of the specified process keyring | |
228 | * - the keyring must have search permission to be found | |
229 | * - implements keyctl(KEYCTL_GET_KEYRING_ID) | |
230 | */ | |
231 | long keyctl_get_keyring_ID(key_serial_t id, int create) | |
232 | { | |
664cceb0 | 233 | key_ref_t key_ref; |
1da177e4 LT |
234 | long ret; |
235 | ||
664cceb0 DH |
236 | key_ref = lookup_user_key(NULL, id, create, 0, KEY_SEARCH); |
237 | if (IS_ERR(key_ref)) { | |
238 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
239 | goto error; |
240 | } | |
241 | ||
664cceb0 DH |
242 | ret = key_ref_to_ptr(key_ref)->serial; |
243 | key_ref_put(key_ref); | |
1da177e4 LT |
244 | error: |
245 | return ret; | |
246 | ||
247 | } /* end keyctl_get_keyring_ID() */ | |
248 | ||
249 | /*****************************************************************************/ | |
250 | /* | |
251 | * join the session keyring | |
252 | * - implements keyctl(KEYCTL_JOIN_SESSION_KEYRING) | |
253 | */ | |
254 | long keyctl_join_session_keyring(const char __user *_name) | |
255 | { | |
256 | char *name; | |
0cb409d9 | 257 | long ret; |
1da177e4 LT |
258 | |
259 | /* fetch the name from userspace */ | |
260 | name = NULL; | |
261 | if (_name) { | |
0cb409d9 DA |
262 | name = strndup_user(_name, PAGE_SIZE); |
263 | if (IS_ERR(name)) { | |
264 | ret = PTR_ERR(name); | |
1da177e4 | 265 | goto error; |
0cb409d9 | 266 | } |
1da177e4 LT |
267 | } |
268 | ||
269 | /* join the session */ | |
270 | ret = join_session_keyring(name); | |
271 | ||
1da177e4 LT |
272 | error: |
273 | return ret; | |
274 | ||
275 | } /* end keyctl_join_session_keyring() */ | |
276 | ||
277 | /*****************************************************************************/ | |
278 | /* | |
279 | * update a key's data payload | |
280 | * - the key must be writable | |
281 | * - implements keyctl(KEYCTL_UPDATE) | |
282 | */ | |
283 | long keyctl_update_key(key_serial_t id, | |
284 | const void __user *_payload, | |
285 | size_t plen) | |
286 | { | |
664cceb0 | 287 | key_ref_t key_ref; |
1da177e4 LT |
288 | void *payload; |
289 | long ret; | |
290 | ||
291 | ret = -EINVAL; | |
292 | if (plen > PAGE_SIZE) | |
293 | goto error; | |
294 | ||
295 | /* pull the payload in if one was supplied */ | |
296 | payload = NULL; | |
297 | if (_payload) { | |
298 | ret = -ENOMEM; | |
299 | payload = kmalloc(plen, GFP_KERNEL); | |
300 | if (!payload) | |
301 | goto error; | |
302 | ||
303 | ret = -EFAULT; | |
304 | if (copy_from_user(payload, _payload, plen) != 0) | |
305 | goto error2; | |
306 | } | |
307 | ||
308 | /* find the target key (which must be writable) */ | |
664cceb0 DH |
309 | key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE); |
310 | if (IS_ERR(key_ref)) { | |
311 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
312 | goto error2; |
313 | } | |
314 | ||
315 | /* update the key */ | |
664cceb0 | 316 | ret = key_update(key_ref, payload, plen); |
1da177e4 | 317 | |
664cceb0 | 318 | key_ref_put(key_ref); |
1da177e4 LT |
319 | error2: |
320 | kfree(payload); | |
321 | error: | |
322 | return ret; | |
323 | ||
324 | } /* end keyctl_update_key() */ | |
325 | ||
326 | /*****************************************************************************/ | |
327 | /* | |
328 | * revoke a key | |
329 | * - the key must be writable | |
330 | * - implements keyctl(KEYCTL_REVOKE) | |
331 | */ | |
332 | long keyctl_revoke_key(key_serial_t id) | |
333 | { | |
664cceb0 | 334 | key_ref_t key_ref; |
1da177e4 LT |
335 | long ret; |
336 | ||
664cceb0 DH |
337 | key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE); |
338 | if (IS_ERR(key_ref)) { | |
339 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
340 | goto error; |
341 | } | |
342 | ||
664cceb0 | 343 | key_revoke(key_ref_to_ptr(key_ref)); |
1da177e4 LT |
344 | ret = 0; |
345 | ||
664cceb0 | 346 | key_ref_put(key_ref); |
1da177e4 | 347 | error: |
1260f801 | 348 | return ret; |
1da177e4 LT |
349 | |
350 | } /* end keyctl_revoke_key() */ | |
351 | ||
352 | /*****************************************************************************/ | |
353 | /* | |
354 | * clear the specified process keyring | |
355 | * - the keyring must be writable | |
356 | * - implements keyctl(KEYCTL_CLEAR) | |
357 | */ | |
358 | long keyctl_keyring_clear(key_serial_t ringid) | |
359 | { | |
664cceb0 | 360 | key_ref_t keyring_ref; |
1da177e4 LT |
361 | long ret; |
362 | ||
664cceb0 DH |
363 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
364 | if (IS_ERR(keyring_ref)) { | |
365 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
366 | goto error; |
367 | } | |
368 | ||
664cceb0 | 369 | ret = keyring_clear(key_ref_to_ptr(keyring_ref)); |
1da177e4 | 370 | |
664cceb0 | 371 | key_ref_put(keyring_ref); |
1da177e4 LT |
372 | error: |
373 | return ret; | |
374 | ||
375 | } /* end keyctl_keyring_clear() */ | |
376 | ||
377 | /*****************************************************************************/ | |
378 | /* | |
379 | * link a key into a keyring | |
380 | * - the keyring must be writable | |
381 | * - the key must be linkable | |
382 | * - implements keyctl(KEYCTL_LINK) | |
383 | */ | |
384 | long keyctl_keyring_link(key_serial_t id, key_serial_t ringid) | |
385 | { | |
664cceb0 | 386 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
387 | long ret; |
388 | ||
664cceb0 DH |
389 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
390 | if (IS_ERR(keyring_ref)) { | |
391 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
392 | goto error; |
393 | } | |
394 | ||
664cceb0 DH |
395 | key_ref = lookup_user_key(NULL, id, 1, 0, KEY_LINK); |
396 | if (IS_ERR(key_ref)) { | |
397 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
398 | goto error2; |
399 | } | |
400 | ||
664cceb0 | 401 | ret = key_link(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref)); |
1da177e4 | 402 | |
664cceb0 | 403 | key_ref_put(key_ref); |
1da177e4 | 404 | error2: |
664cceb0 | 405 | key_ref_put(keyring_ref); |
1da177e4 LT |
406 | error: |
407 | return ret; | |
408 | ||
409 | } /* end keyctl_keyring_link() */ | |
410 | ||
411 | /*****************************************************************************/ | |
412 | /* | |
413 | * unlink the first attachment of a key from a keyring | |
414 | * - the keyring must be writable | |
415 | * - we don't need any permissions on the key | |
416 | * - implements keyctl(KEYCTL_UNLINK) | |
417 | */ | |
418 | long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid) | |
419 | { | |
664cceb0 | 420 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
421 | long ret; |
422 | ||
664cceb0 DH |
423 | keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE); |
424 | if (IS_ERR(keyring_ref)) { | |
425 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
426 | goto error; |
427 | } | |
428 | ||
664cceb0 DH |
429 | key_ref = lookup_user_key(NULL, id, 0, 0, 0); |
430 | if (IS_ERR(key_ref)) { | |
431 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
432 | goto error2; |
433 | } | |
434 | ||
664cceb0 | 435 | ret = key_unlink(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref)); |
1da177e4 | 436 | |
664cceb0 | 437 | key_ref_put(key_ref); |
1da177e4 | 438 | error2: |
664cceb0 | 439 | key_ref_put(keyring_ref); |
1da177e4 LT |
440 | error: |
441 | return ret; | |
442 | ||
443 | } /* end keyctl_keyring_unlink() */ | |
444 | ||
445 | /*****************************************************************************/ | |
446 | /* | |
447 | * describe a user key | |
448 | * - the key must have view permission | |
449 | * - if there's a buffer, we place up to buflen bytes of data into it | |
450 | * - unless there's an error, we return the amount of description available, | |
451 | * irrespective of how much we may have copied | |
452 | * - the description is formatted thus: | |
453 | * type;uid;gid;perm;description<NUL> | |
454 | * - implements keyctl(KEYCTL_DESCRIBE) | |
455 | */ | |
456 | long keyctl_describe_key(key_serial_t keyid, | |
457 | char __user *buffer, | |
458 | size_t buflen) | |
459 | { | |
3e30148c | 460 | struct key *key, *instkey; |
664cceb0 | 461 | key_ref_t key_ref; |
1da177e4 LT |
462 | char *tmpbuf; |
463 | long ret; | |
464 | ||
664cceb0 DH |
465 | key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW); |
466 | if (IS_ERR(key_ref)) { | |
3e30148c DH |
467 | /* viewing a key under construction is permitted if we have the |
468 | * authorisation token handy */ | |
664cceb0 | 469 | if (PTR_ERR(key_ref) == -EACCES) { |
3e30148c DH |
470 | instkey = key_get_instantiation_authkey(keyid); |
471 | if (!IS_ERR(instkey)) { | |
472 | key_put(instkey); | |
664cceb0 DH |
473 | key_ref = lookup_user_key(NULL, keyid, |
474 | 0, 1, 0); | |
475 | if (!IS_ERR(key_ref)) | |
3e30148c DH |
476 | goto okay; |
477 | } | |
478 | } | |
479 | ||
664cceb0 | 480 | ret = PTR_ERR(key_ref); |
1da177e4 LT |
481 | goto error; |
482 | } | |
483 | ||
3e30148c | 484 | okay: |
1da177e4 LT |
485 | /* calculate how much description we're going to return */ |
486 | ret = -ENOMEM; | |
487 | tmpbuf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
488 | if (!tmpbuf) | |
489 | goto error2; | |
490 | ||
664cceb0 DH |
491 | key = key_ref_to_ptr(key_ref); |
492 | ||
1da177e4 | 493 | ret = snprintf(tmpbuf, PAGE_SIZE - 1, |
664cceb0 DH |
494 | "%s;%d;%d;%08x;%s", |
495 | key_ref_to_ptr(key_ref)->type->name, | |
496 | key_ref_to_ptr(key_ref)->uid, | |
497 | key_ref_to_ptr(key_ref)->gid, | |
498 | key_ref_to_ptr(key_ref)->perm, | |
499 | key_ref_to_ptr(key_ref)->description ? | |
500 | key_ref_to_ptr(key_ref)->description : "" | |
1da177e4 LT |
501 | ); |
502 | ||
503 | /* include a NUL char at the end of the data */ | |
504 | if (ret > PAGE_SIZE - 1) | |
505 | ret = PAGE_SIZE - 1; | |
506 | tmpbuf[ret] = 0; | |
507 | ret++; | |
508 | ||
509 | /* consider returning the data */ | |
510 | if (buffer && buflen > 0) { | |
511 | if (buflen > ret) | |
512 | buflen = ret; | |
513 | ||
514 | if (copy_to_user(buffer, tmpbuf, buflen) != 0) | |
515 | ret = -EFAULT; | |
516 | } | |
517 | ||
518 | kfree(tmpbuf); | |
519 | error2: | |
664cceb0 | 520 | key_ref_put(key_ref); |
1da177e4 LT |
521 | error: |
522 | return ret; | |
523 | ||
524 | } /* end keyctl_describe_key() */ | |
525 | ||
526 | /*****************************************************************************/ | |
527 | /* | |
528 | * search the specified keyring for a matching key | |
529 | * - the start keyring must be searchable | |
530 | * - nested keyrings may also be searched if they are searchable | |
531 | * - only keys with search permission may be found | |
532 | * - if a key is found, it will be attached to the destination keyring if | |
533 | * there's one specified | |
534 | * - implements keyctl(KEYCTL_SEARCH) | |
535 | */ | |
536 | long keyctl_keyring_search(key_serial_t ringid, | |
537 | const char __user *_type, | |
538 | const char __user *_description, | |
539 | key_serial_t destringid) | |
540 | { | |
541 | struct key_type *ktype; | |
664cceb0 | 542 | key_ref_t keyring_ref, key_ref, dest_ref; |
1da177e4 | 543 | char type[32], *description; |
0cb409d9 | 544 | long ret; |
1da177e4 LT |
545 | |
546 | /* pull the type and description into kernel space */ | |
0cb409d9 | 547 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
548 | if (ret < 0) |
549 | goto error; | |
1da177e4 | 550 | |
0cb409d9 DA |
551 | description = strndup_user(_description, PAGE_SIZE); |
552 | if (IS_ERR(description)) { | |
553 | ret = PTR_ERR(description); | |
1da177e4 | 554 | goto error; |
0cb409d9 | 555 | } |
1da177e4 LT |
556 | |
557 | /* get the keyring at which to begin the search */ | |
664cceb0 DH |
558 | keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH); |
559 | if (IS_ERR(keyring_ref)) { | |
560 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
561 | goto error2; |
562 | } | |
563 | ||
564 | /* get the destination keyring if specified */ | |
664cceb0 | 565 | dest_ref = NULL; |
1da177e4 | 566 | if (destringid) { |
664cceb0 DH |
567 | dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE); |
568 | if (IS_ERR(dest_ref)) { | |
569 | ret = PTR_ERR(dest_ref); | |
1da177e4 LT |
570 | goto error3; |
571 | } | |
572 | } | |
573 | ||
574 | /* find the key type */ | |
575 | ktype = key_type_lookup(type); | |
576 | if (IS_ERR(ktype)) { | |
577 | ret = PTR_ERR(ktype); | |
578 | goto error4; | |
579 | } | |
580 | ||
581 | /* do the search */ | |
664cceb0 DH |
582 | key_ref = keyring_search(keyring_ref, ktype, description); |
583 | if (IS_ERR(key_ref)) { | |
584 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
585 | |
586 | /* treat lack or presence of a negative key the same */ | |
587 | if (ret == -EAGAIN) | |
588 | ret = -ENOKEY; | |
589 | goto error5; | |
590 | } | |
591 | ||
592 | /* link the resulting key to the destination keyring if we can */ | |
664cceb0 | 593 | if (dest_ref) { |
29db9190 DH |
594 | ret = key_permission(key_ref, KEY_LINK); |
595 | if (ret < 0) | |
1da177e4 LT |
596 | goto error6; |
597 | ||
664cceb0 | 598 | ret = key_link(key_ref_to_ptr(dest_ref), key_ref_to_ptr(key_ref)); |
1da177e4 LT |
599 | if (ret < 0) |
600 | goto error6; | |
601 | } | |
602 | ||
664cceb0 | 603 | ret = key_ref_to_ptr(key_ref)->serial; |
1da177e4 LT |
604 | |
605 | error6: | |
664cceb0 | 606 | key_ref_put(key_ref); |
1da177e4 LT |
607 | error5: |
608 | key_type_put(ktype); | |
609 | error4: | |
664cceb0 | 610 | key_ref_put(dest_ref); |
1da177e4 | 611 | error3: |
664cceb0 | 612 | key_ref_put(keyring_ref); |
1da177e4 LT |
613 | error2: |
614 | kfree(description); | |
615 | error: | |
616 | return ret; | |
617 | ||
618 | } /* end keyctl_keyring_search() */ | |
619 | ||
1da177e4 LT |
620 | /*****************************************************************************/ |
621 | /* | |
622 | * read a user key's payload | |
623 | * - the keyring must be readable or the key must be searchable from the | |
624 | * process's keyrings | |
625 | * - if there's a buffer, we place up to buflen bytes of data into it | |
626 | * - unless there's an error, we return the amount of data in the key, | |
627 | * irrespective of how much we may have copied | |
628 | * - implements keyctl(KEYCTL_READ) | |
629 | */ | |
630 | long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen) | |
631 | { | |
664cceb0 DH |
632 | struct key *key; |
633 | key_ref_t key_ref; | |
1da177e4 LT |
634 | long ret; |
635 | ||
636 | /* find the key first */ | |
664cceb0 DH |
637 | key_ref = lookup_user_key(NULL, keyid, 0, 0, 0); |
638 | if (IS_ERR(key_ref)) { | |
639 | ret = -ENOKEY; | |
640 | goto error; | |
1da177e4 LT |
641 | } |
642 | ||
664cceb0 DH |
643 | key = key_ref_to_ptr(key_ref); |
644 | ||
645 | /* see if we can read it directly */ | |
29db9190 DH |
646 | ret = key_permission(key_ref, KEY_READ); |
647 | if (ret == 0) | |
664cceb0 | 648 | goto can_read_key; |
29db9190 DH |
649 | if (ret != -EACCES) |
650 | goto error; | |
664cceb0 DH |
651 | |
652 | /* we can't; see if it's searchable from this process's keyrings | |
653 | * - we automatically take account of the fact that it may be | |
654 | * dangling off an instantiation key | |
655 | */ | |
656 | if (!is_key_possessed(key_ref)) { | |
657 | ret = -EACCES; | |
658 | goto error2; | |
659 | } | |
1da177e4 LT |
660 | |
661 | /* the key is probably readable - now try to read it */ | |
1da177e4 LT |
662 | can_read_key: |
663 | ret = key_validate(key); | |
664 | if (ret == 0) { | |
665 | ret = -EOPNOTSUPP; | |
666 | if (key->type->read) { | |
667 | /* read the data with the semaphore held (since we | |
668 | * might sleep) */ | |
669 | down_read(&key->sem); | |
670 | ret = key->type->read(key, buffer, buflen); | |
671 | up_read(&key->sem); | |
672 | } | |
673 | } | |
674 | ||
675 | error2: | |
676 | key_put(key); | |
677 | error: | |
678 | return ret; | |
679 | ||
680 | } /* end keyctl_read_key() */ | |
681 | ||
682 | /*****************************************************************************/ | |
683 | /* | |
684 | * change the ownership of a key | |
685 | * - the keyring owned by the changer | |
686 | * - if the uid or gid is -1, then that parameter is not changed | |
687 | * - implements keyctl(KEYCTL_CHOWN) | |
688 | */ | |
689 | long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid) | |
690 | { | |
5801649d | 691 | struct key_user *newowner, *zapowner = NULL; |
1da177e4 | 692 | struct key *key; |
664cceb0 | 693 | key_ref_t key_ref; |
1da177e4 LT |
694 | long ret; |
695 | ||
696 | ret = 0; | |
697 | if (uid == (uid_t) -1 && gid == (gid_t) -1) | |
698 | goto error; | |
699 | ||
29db9190 | 700 | key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); |
664cceb0 DH |
701 | if (IS_ERR(key_ref)) { |
702 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
703 | goto error; |
704 | } | |
705 | ||
664cceb0 DH |
706 | key = key_ref_to_ptr(key_ref); |
707 | ||
1da177e4 LT |
708 | /* make the changes with the locks held to prevent chown/chown races */ |
709 | ret = -EACCES; | |
710 | down_write(&key->sem); | |
1da177e4 LT |
711 | |
712 | if (!capable(CAP_SYS_ADMIN)) { | |
713 | /* only the sysadmin can chown a key to some other UID */ | |
714 | if (uid != (uid_t) -1 && key->uid != uid) | |
5801649d | 715 | goto error_put; |
1da177e4 LT |
716 | |
717 | /* only the sysadmin can set the key's GID to a group other | |
718 | * than one of those that the current process subscribes to */ | |
719 | if (gid != (gid_t) -1 && gid != key->gid && !in_group_p(gid)) | |
5801649d | 720 | goto error_put; |
1da177e4 LT |
721 | } |
722 | ||
5801649d | 723 | /* change the UID */ |
1da177e4 | 724 | if (uid != (uid_t) -1 && uid != key->uid) { |
5801649d FT |
725 | ret = -ENOMEM; |
726 | newowner = key_user_lookup(uid); | |
727 | if (!newowner) | |
728 | goto error_put; | |
729 | ||
730 | /* transfer the quota burden to the new user */ | |
731 | if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) { | |
732 | spin_lock(&newowner->lock); | |
733 | if (newowner->qnkeys + 1 >= KEYQUOTA_MAX_KEYS || | |
734 | newowner->qnbytes + key->quotalen >= | |
735 | KEYQUOTA_MAX_BYTES) | |
736 | goto quota_overrun; | |
737 | ||
738 | newowner->qnkeys++; | |
739 | newowner->qnbytes += key->quotalen; | |
740 | spin_unlock(&newowner->lock); | |
741 | ||
742 | spin_lock(&key->user->lock); | |
743 | key->user->qnkeys--; | |
744 | key->user->qnbytes -= key->quotalen; | |
745 | spin_unlock(&key->user->lock); | |
746 | } | |
747 | ||
748 | atomic_dec(&key->user->nkeys); | |
749 | atomic_inc(&newowner->nkeys); | |
750 | ||
751 | if (test_bit(KEY_FLAG_INSTANTIATED, &key->flags)) { | |
752 | atomic_dec(&key->user->nikeys); | |
753 | atomic_inc(&newowner->nikeys); | |
754 | } | |
755 | ||
756 | zapowner = key->user; | |
757 | key->user = newowner; | |
758 | key->uid = uid; | |
1da177e4 LT |
759 | } |
760 | ||
761 | /* change the GID */ | |
762 | if (gid != (gid_t) -1) | |
763 | key->gid = gid; | |
764 | ||
765 | ret = 0; | |
766 | ||
5801649d | 767 | error_put: |
1da177e4 LT |
768 | up_write(&key->sem); |
769 | key_put(key); | |
5801649d FT |
770 | if (zapowner) |
771 | key_user_put(zapowner); | |
772 | error: | |
1da177e4 LT |
773 | return ret; |
774 | ||
5801649d FT |
775 | quota_overrun: |
776 | spin_unlock(&newowner->lock); | |
777 | zapowner = newowner; | |
778 | ret = -EDQUOT; | |
779 | goto error_put; | |
780 | ||
1da177e4 LT |
781 | } /* end keyctl_chown_key() */ |
782 | ||
783 | /*****************************************************************************/ | |
784 | /* | |
785 | * change the permission mask on a key | |
786 | * - the keyring owned by the changer | |
787 | * - implements keyctl(KEYCTL_SETPERM) | |
788 | */ | |
789 | long keyctl_setperm_key(key_serial_t id, key_perm_t perm) | |
790 | { | |
791 | struct key *key; | |
664cceb0 | 792 | key_ref_t key_ref; |
1da177e4 LT |
793 | long ret; |
794 | ||
795 | ret = -EINVAL; | |
664cceb0 | 796 | if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL)) |
1da177e4 LT |
797 | goto error; |
798 | ||
29db9190 | 799 | key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); |
664cceb0 DH |
800 | if (IS_ERR(key_ref)) { |
801 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
802 | goto error; |
803 | } | |
804 | ||
664cceb0 DH |
805 | key = key_ref_to_ptr(key_ref); |
806 | ||
76d8aeab | 807 | /* make the changes with the locks held to prevent chown/chmod races */ |
1da177e4 LT |
808 | ret = -EACCES; |
809 | down_write(&key->sem); | |
1da177e4 | 810 | |
76d8aeab DH |
811 | /* if we're not the sysadmin, we can only change a key that we own */ |
812 | if (capable(CAP_SYS_ADMIN) || key->uid == current->fsuid) { | |
813 | key->perm = perm; | |
814 | ret = 0; | |
815 | } | |
1da177e4 | 816 | |
1da177e4 LT |
817 | up_write(&key->sem); |
818 | key_put(key); | |
76d8aeab | 819 | error: |
1da177e4 LT |
820 | return ret; |
821 | ||
822 | } /* end keyctl_setperm_key() */ | |
823 | ||
824 | /*****************************************************************************/ | |
825 | /* | |
826 | * instantiate the key with the specified payload, and, if one is given, link | |
827 | * the key into the keyring | |
828 | */ | |
829 | long keyctl_instantiate_key(key_serial_t id, | |
830 | const void __user *_payload, | |
831 | size_t plen, | |
832 | key_serial_t ringid) | |
833 | { | |
3e30148c | 834 | struct request_key_auth *rka; |
664cceb0 DH |
835 | struct key *instkey; |
836 | key_ref_t keyring_ref; | |
1da177e4 LT |
837 | void *payload; |
838 | long ret; | |
38bbca6b | 839 | bool vm = false; |
1da177e4 LT |
840 | |
841 | ret = -EINVAL; | |
38bbca6b | 842 | if (plen > 1024 * 1024 - 1) |
1da177e4 LT |
843 | goto error; |
844 | ||
b5f545c8 DH |
845 | /* the appropriate instantiation authorisation key must have been |
846 | * assumed before calling this */ | |
847 | ret = -EPERM; | |
848 | instkey = current->request_key_auth; | |
849 | if (!instkey) | |
850 | goto error; | |
851 | ||
852 | rka = instkey->payload.data; | |
853 | if (rka->target_key->serial != id) | |
854 | goto error; | |
855 | ||
1da177e4 LT |
856 | /* pull the payload in if one was supplied */ |
857 | payload = NULL; | |
858 | ||
859 | if (_payload) { | |
860 | ret = -ENOMEM; | |
861 | payload = kmalloc(plen, GFP_KERNEL); | |
38bbca6b DH |
862 | if (!payload) { |
863 | if (plen <= PAGE_SIZE) | |
864 | goto error; | |
865 | vm = true; | |
866 | payload = vmalloc(plen); | |
867 | if (!payload) | |
868 | goto error; | |
869 | } | |
1da177e4 LT |
870 | |
871 | ret = -EFAULT; | |
872 | if (copy_from_user(payload, _payload, plen) != 0) | |
873 | goto error2; | |
874 | } | |
875 | ||
3e30148c DH |
876 | /* find the destination keyring amongst those belonging to the |
877 | * requesting task */ | |
664cceb0 | 878 | keyring_ref = NULL; |
1da177e4 | 879 | if (ringid) { |
664cceb0 DH |
880 | keyring_ref = lookup_user_key(rka->context, ringid, 1, 0, |
881 | KEY_WRITE); | |
882 | if (IS_ERR(keyring_ref)) { | |
883 | ret = PTR_ERR(keyring_ref); | |
b5f545c8 | 884 | goto error2; |
1da177e4 LT |
885 | } |
886 | } | |
887 | ||
888 | /* instantiate the key and link it into a keyring */ | |
3e30148c | 889 | ret = key_instantiate_and_link(rka->target_key, payload, plen, |
664cceb0 | 890 | key_ref_to_ptr(keyring_ref), instkey); |
1da177e4 | 891 | |
664cceb0 | 892 | key_ref_put(keyring_ref); |
b5f545c8 DH |
893 | |
894 | /* discard the assumed authority if it's just been disabled by | |
895 | * instantiation of the key */ | |
896 | if (ret == 0) { | |
897 | key_put(current->request_key_auth); | |
898 | current->request_key_auth = NULL; | |
899 | } | |
900 | ||
901 | error2: | |
38bbca6b DH |
902 | if (!vm) |
903 | kfree(payload); | |
904 | else | |
905 | vfree(payload); | |
b5f545c8 | 906 | error: |
1da177e4 LT |
907 | return ret; |
908 | ||
909 | } /* end keyctl_instantiate_key() */ | |
910 | ||
911 | /*****************************************************************************/ | |
912 | /* | |
913 | * negatively instantiate the key with the given timeout (in seconds), and, if | |
914 | * one is given, link the key into the keyring | |
915 | */ | |
916 | long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid) | |
917 | { | |
3e30148c | 918 | struct request_key_auth *rka; |
664cceb0 DH |
919 | struct key *instkey; |
920 | key_ref_t keyring_ref; | |
1da177e4 LT |
921 | long ret; |
922 | ||
b5f545c8 DH |
923 | /* the appropriate instantiation authorisation key must have been |
924 | * assumed before calling this */ | |
925 | ret = -EPERM; | |
926 | instkey = current->request_key_auth; | |
927 | if (!instkey) | |
1da177e4 | 928 | goto error; |
1da177e4 | 929 | |
3e30148c | 930 | rka = instkey->payload.data; |
b5f545c8 DH |
931 | if (rka->target_key->serial != id) |
932 | goto error; | |
3e30148c | 933 | |
1da177e4 LT |
934 | /* find the destination keyring if present (which must also be |
935 | * writable) */ | |
664cceb0 | 936 | keyring_ref = NULL; |
1da177e4 | 937 | if (ringid) { |
664cceb0 DH |
938 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
939 | if (IS_ERR(keyring_ref)) { | |
940 | ret = PTR_ERR(keyring_ref); | |
b5f545c8 | 941 | goto error; |
1da177e4 LT |
942 | } |
943 | } | |
944 | ||
945 | /* instantiate the key and link it into a keyring */ | |
664cceb0 DH |
946 | ret = key_negate_and_link(rka->target_key, timeout, |
947 | key_ref_to_ptr(keyring_ref), instkey); | |
1da177e4 | 948 | |
664cceb0 | 949 | key_ref_put(keyring_ref); |
b5f545c8 DH |
950 | |
951 | /* discard the assumed authority if it's just been disabled by | |
952 | * instantiation of the key */ | |
953 | if (ret == 0) { | |
954 | key_put(current->request_key_auth); | |
955 | current->request_key_auth = NULL; | |
956 | } | |
957 | ||
958 | error: | |
1da177e4 LT |
959 | return ret; |
960 | ||
961 | } /* end keyctl_negate_key() */ | |
962 | ||
3e30148c DH |
963 | /*****************************************************************************/ |
964 | /* | |
965 | * set the default keyring in which request_key() will cache keys | |
966 | * - return the old setting | |
967 | */ | |
968 | long keyctl_set_reqkey_keyring(int reqkey_defl) | |
969 | { | |
970 | int ret; | |
971 | ||
972 | switch (reqkey_defl) { | |
973 | case KEY_REQKEY_DEFL_THREAD_KEYRING: | |
974 | ret = install_thread_keyring(current); | |
975 | if (ret < 0) | |
976 | return ret; | |
977 | goto set; | |
978 | ||
979 | case KEY_REQKEY_DEFL_PROCESS_KEYRING: | |
980 | ret = install_process_keyring(current); | |
981 | if (ret < 0) | |
982 | return ret; | |
983 | ||
984 | case KEY_REQKEY_DEFL_DEFAULT: | |
985 | case KEY_REQKEY_DEFL_SESSION_KEYRING: | |
986 | case KEY_REQKEY_DEFL_USER_KEYRING: | |
987 | case KEY_REQKEY_DEFL_USER_SESSION_KEYRING: | |
988 | set: | |
989 | current->jit_keyring = reqkey_defl; | |
990 | ||
991 | case KEY_REQKEY_DEFL_NO_CHANGE: | |
992 | return current->jit_keyring; | |
993 | ||
994 | case KEY_REQKEY_DEFL_GROUP_KEYRING: | |
995 | default: | |
996 | return -EINVAL; | |
997 | } | |
998 | ||
999 | } /* end keyctl_set_reqkey_keyring() */ | |
1000 | ||
017679c4 DH |
1001 | /*****************************************************************************/ |
1002 | /* | |
1003 | * set or clear the timeout for a key | |
1004 | */ | |
1005 | long keyctl_set_timeout(key_serial_t id, unsigned timeout) | |
1006 | { | |
1007 | struct timespec now; | |
1008 | struct key *key; | |
1009 | key_ref_t key_ref; | |
1010 | time_t expiry; | |
1011 | long ret; | |
1012 | ||
1013 | key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); | |
1014 | if (IS_ERR(key_ref)) { | |
1015 | ret = PTR_ERR(key_ref); | |
1016 | goto error; | |
1017 | } | |
1018 | ||
1019 | key = key_ref_to_ptr(key_ref); | |
1020 | ||
1021 | /* make the changes with the locks held to prevent races */ | |
1022 | down_write(&key->sem); | |
1023 | ||
1024 | expiry = 0; | |
1025 | if (timeout > 0) { | |
1026 | now = current_kernel_time(); | |
1027 | expiry = now.tv_sec + timeout; | |
1028 | } | |
1029 | ||
1030 | key->expiry = expiry; | |
1031 | ||
1032 | up_write(&key->sem); | |
1033 | key_put(key); | |
1034 | ||
1035 | ret = 0; | |
1036 | error: | |
1037 | return ret; | |
1038 | ||
1039 | } /* end keyctl_set_timeout() */ | |
1040 | ||
b5f545c8 DH |
1041 | /*****************************************************************************/ |
1042 | /* | |
1043 | * assume the authority to instantiate the specified key | |
1044 | */ | |
1045 | long keyctl_assume_authority(key_serial_t id) | |
1046 | { | |
1047 | struct key *authkey; | |
1048 | long ret; | |
1049 | ||
1050 | /* special key IDs aren't permitted */ | |
1051 | ret = -EINVAL; | |
1052 | if (id < 0) | |
1053 | goto error; | |
1054 | ||
1055 | /* we divest ourselves of authority if given an ID of 0 */ | |
1056 | if (id == 0) { | |
1057 | key_put(current->request_key_auth); | |
1058 | current->request_key_auth = NULL; | |
1059 | ret = 0; | |
1060 | goto error; | |
1061 | } | |
1062 | ||
1063 | /* attempt to assume the authority temporarily granted to us whilst we | |
1064 | * instantiate the specified key | |
1065 | * - the authorisation key must be in the current task's keyrings | |
1066 | * somewhere | |
1067 | */ | |
1068 | authkey = key_get_instantiation_authkey(id); | |
1069 | if (IS_ERR(authkey)) { | |
1070 | ret = PTR_ERR(authkey); | |
1071 | goto error; | |
1072 | } | |
1073 | ||
1074 | key_put(current->request_key_auth); | |
1075 | current->request_key_auth = authkey; | |
1076 | ret = authkey->serial; | |
1077 | ||
1078 | error: | |
1079 | return ret; | |
1080 | ||
1081 | } /* end keyctl_assume_authority() */ | |
1082 | ||
1da177e4 LT |
1083 | /*****************************************************************************/ |
1084 | /* | |
1085 | * the key control system call | |
1086 | */ | |
1087 | asmlinkage long sys_keyctl(int option, unsigned long arg2, unsigned long arg3, | |
1088 | unsigned long arg4, unsigned long arg5) | |
1089 | { | |
1090 | switch (option) { | |
1091 | case KEYCTL_GET_KEYRING_ID: | |
1092 | return keyctl_get_keyring_ID((key_serial_t) arg2, | |
1093 | (int) arg3); | |
1094 | ||
1095 | case KEYCTL_JOIN_SESSION_KEYRING: | |
1096 | return keyctl_join_session_keyring((const char __user *) arg2); | |
1097 | ||
1098 | case KEYCTL_UPDATE: | |
1099 | return keyctl_update_key((key_serial_t) arg2, | |
1100 | (const void __user *) arg3, | |
1101 | (size_t) arg4); | |
1102 | ||
1103 | case KEYCTL_REVOKE: | |
1104 | return keyctl_revoke_key((key_serial_t) arg2); | |
1105 | ||
1106 | case KEYCTL_DESCRIBE: | |
1107 | return keyctl_describe_key((key_serial_t) arg2, | |
1108 | (char __user *) arg3, | |
1109 | (unsigned) arg4); | |
1110 | ||
1111 | case KEYCTL_CLEAR: | |
1112 | return keyctl_keyring_clear((key_serial_t) arg2); | |
1113 | ||
1114 | case KEYCTL_LINK: | |
1115 | return keyctl_keyring_link((key_serial_t) arg2, | |
1116 | (key_serial_t) arg3); | |
1117 | ||
1118 | case KEYCTL_UNLINK: | |
1119 | return keyctl_keyring_unlink((key_serial_t) arg2, | |
1120 | (key_serial_t) arg3); | |
1121 | ||
1122 | case KEYCTL_SEARCH: | |
1123 | return keyctl_keyring_search((key_serial_t) arg2, | |
1124 | (const char __user *) arg3, | |
1125 | (const char __user *) arg4, | |
1126 | (key_serial_t) arg5); | |
1127 | ||
1128 | case KEYCTL_READ: | |
1129 | return keyctl_read_key((key_serial_t) arg2, | |
1130 | (char __user *) arg3, | |
1131 | (size_t) arg4); | |
1132 | ||
1133 | case KEYCTL_CHOWN: | |
1134 | return keyctl_chown_key((key_serial_t) arg2, | |
1135 | (uid_t) arg3, | |
1136 | (gid_t) arg4); | |
1137 | ||
1138 | case KEYCTL_SETPERM: | |
1139 | return keyctl_setperm_key((key_serial_t) arg2, | |
1140 | (key_perm_t) arg3); | |
1141 | ||
1142 | case KEYCTL_INSTANTIATE: | |
1143 | return keyctl_instantiate_key((key_serial_t) arg2, | |
1144 | (const void __user *) arg3, | |
1145 | (size_t) arg4, | |
1146 | (key_serial_t) arg5); | |
1147 | ||
1148 | case KEYCTL_NEGATE: | |
1149 | return keyctl_negate_key((key_serial_t) arg2, | |
1150 | (unsigned) arg3, | |
1151 | (key_serial_t) arg4); | |
1152 | ||
3e30148c DH |
1153 | case KEYCTL_SET_REQKEY_KEYRING: |
1154 | return keyctl_set_reqkey_keyring(arg2); | |
1155 | ||
017679c4 DH |
1156 | case KEYCTL_SET_TIMEOUT: |
1157 | return keyctl_set_timeout((key_serial_t) arg2, | |
1158 | (unsigned) arg3); | |
1159 | ||
b5f545c8 DH |
1160 | case KEYCTL_ASSUME_AUTHORITY: |
1161 | return keyctl_assume_authority((key_serial_t) arg2); | |
1162 | ||
1da177e4 LT |
1163 | default: |
1164 | return -EOPNOTSUPP; | |
1165 | } | |
1166 | ||
1167 | } /* end sys_keyctl() */ |