Commit | Line | Data |
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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> |
70a5bb72 | 23 | #include <linux/security.h> |
1da177e4 LT |
24 | #include <asm/uaccess.h> |
25 | #include "internal.h" | |
26 | ||
0cb409d9 DA |
27 | static int key_get_type_from_user(char *type, |
28 | const char __user *_type, | |
29 | unsigned len) | |
30 | { | |
31 | int ret; | |
32 | ||
33 | ret = strncpy_from_user(type, _type, len); | |
34 | ||
35 | if (ret < 0) | |
36 | return -EFAULT; | |
37 | ||
38 | if (ret == 0 || ret >= len) | |
39 | return -EINVAL; | |
40 | ||
41 | if (type[0] == '.') | |
42 | return -EPERM; | |
43 | ||
44 | type[len - 1] = '\0'; | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
1da177e4 LT |
49 | /*****************************************************************************/ |
50 | /* | |
51 | * extract the description of a new key from userspace and either add it as a | |
52 | * new key to the specified keyring or update a matching key in that keyring | |
53 | * - the keyring must be writable | |
54 | * - returns the new key's serial number | |
55 | * - implements add_key() | |
56 | */ | |
57 | asmlinkage long sys_add_key(const char __user *_type, | |
58 | const char __user *_description, | |
59 | const void __user *_payload, | |
60 | size_t plen, | |
61 | key_serial_t ringid) | |
62 | { | |
664cceb0 | 63 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
64 | char type[32], *description; |
65 | void *payload; | |
0cb409d9 | 66 | long ret; |
38bbca6b | 67 | bool vm; |
1da177e4 LT |
68 | |
69 | ret = -EINVAL; | |
38bbca6b | 70 | if (plen > 1024 * 1024 - 1) |
1da177e4 LT |
71 | goto error; |
72 | ||
73 | /* draw all the data into kernel space */ | |
0cb409d9 | 74 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
75 | if (ret < 0) |
76 | goto error; | |
1da177e4 | 77 | |
0cb409d9 DA |
78 | description = strndup_user(_description, PAGE_SIZE); |
79 | if (IS_ERR(description)) { | |
80 | ret = PTR_ERR(description); | |
1da177e4 | 81 | goto error; |
0cb409d9 | 82 | } |
1da177e4 LT |
83 | |
84 | /* pull the payload in if one was supplied */ | |
85 | payload = NULL; | |
86 | ||
38bbca6b | 87 | vm = false; |
1da177e4 LT |
88 | if (_payload) { |
89 | ret = -ENOMEM; | |
90 | payload = kmalloc(plen, GFP_KERNEL); | |
38bbca6b DH |
91 | if (!payload) { |
92 | if (plen <= PAGE_SIZE) | |
93 | goto error2; | |
94 | vm = true; | |
95 | payload = vmalloc(plen); | |
96 | if (!payload) | |
97 | goto error2; | |
98 | } | |
1da177e4 LT |
99 | |
100 | ret = -EFAULT; | |
101 | if (copy_from_user(payload, _payload, plen) != 0) | |
102 | goto error3; | |
103 | } | |
104 | ||
105 | /* find the target keyring (which must be writable) */ | |
664cceb0 DH |
106 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
107 | if (IS_ERR(keyring_ref)) { | |
108 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
109 | goto error3; |
110 | } | |
111 | ||
112 | /* create or update the requested key and add it to the target | |
113 | * keyring */ | |
664cceb0 | 114 | key_ref = key_create_or_update(keyring_ref, type, description, |
7e047ef5 | 115 | payload, plen, KEY_ALLOC_IN_QUOTA); |
664cceb0 DH |
116 | if (!IS_ERR(key_ref)) { |
117 | ret = key_ref_to_ptr(key_ref)->serial; | |
118 | key_ref_put(key_ref); | |
1da177e4 LT |
119 | } |
120 | else { | |
664cceb0 | 121 | ret = PTR_ERR(key_ref); |
1da177e4 LT |
122 | } |
123 | ||
664cceb0 | 124 | key_ref_put(keyring_ref); |
1da177e4 | 125 | error3: |
38bbca6b DH |
126 | if (!vm) |
127 | kfree(payload); | |
128 | else | |
129 | vfree(payload); | |
1da177e4 LT |
130 | error2: |
131 | kfree(description); | |
132 | error: | |
133 | return ret; | |
134 | ||
135 | } /* end sys_add_key() */ | |
136 | ||
137 | /*****************************************************************************/ | |
138 | /* | |
139 | * search the process keyrings for a matching key | |
140 | * - nested keyrings may also be searched if they have Search permission | |
141 | * - if a key is found, it will be attached to the destination keyring if | |
142 | * there's one specified | |
143 | * - /sbin/request-key will be invoked if _callout_info is non-NULL | |
144 | * - the _callout_info string will be passed to /sbin/request-key | |
145 | * - if the _callout_info string is empty, it will be rendered as "-" | |
146 | * - implements request_key() | |
147 | */ | |
148 | asmlinkage long sys_request_key(const char __user *_type, | |
149 | const char __user *_description, | |
150 | const char __user *_callout_info, | |
151 | key_serial_t destringid) | |
152 | { | |
153 | struct key_type *ktype; | |
664cceb0 DH |
154 | struct key *key; |
155 | key_ref_t dest_ref; | |
4a38e122 | 156 | size_t callout_len; |
1da177e4 | 157 | char type[32], *description, *callout_info; |
0cb409d9 | 158 | long ret; |
1da177e4 LT |
159 | |
160 | /* pull the type into kernel space */ | |
0cb409d9 | 161 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
162 | if (ret < 0) |
163 | goto error; | |
1260f801 | 164 | |
1da177e4 | 165 | /* pull the description into kernel space */ |
0cb409d9 DA |
166 | description = strndup_user(_description, PAGE_SIZE); |
167 | if (IS_ERR(description)) { | |
168 | ret = PTR_ERR(description); | |
1da177e4 | 169 | goto error; |
0cb409d9 | 170 | } |
1da177e4 LT |
171 | |
172 | /* pull the callout info into kernel space */ | |
173 | callout_info = NULL; | |
4a38e122 | 174 | callout_len = 0; |
1da177e4 | 175 | if (_callout_info) { |
0cb409d9 DA |
176 | callout_info = strndup_user(_callout_info, PAGE_SIZE); |
177 | if (IS_ERR(callout_info)) { | |
178 | ret = PTR_ERR(callout_info); | |
1da177e4 | 179 | goto error2; |
0cb409d9 | 180 | } |
4a38e122 | 181 | callout_len = strlen(callout_info); |
1da177e4 LT |
182 | } |
183 | ||
184 | /* get the destination keyring if specified */ | |
664cceb0 | 185 | dest_ref = NULL; |
1da177e4 | 186 | if (destringid) { |
664cceb0 DH |
187 | dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE); |
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 | ||
1da177e4 LT |
210 | ret = key->serial; |
211 | ||
3e30148c | 212 | key_put(key); |
1da177e4 LT |
213 | error5: |
214 | key_type_put(ktype); | |
215 | error4: | |
664cceb0 | 216 | key_ref_put(dest_ref); |
1da177e4 LT |
217 | error3: |
218 | kfree(callout_info); | |
219 | error2: | |
220 | kfree(description); | |
221 | error: | |
222 | return ret; | |
223 | ||
224 | } /* end sys_request_key() */ | |
225 | ||
226 | /*****************************************************************************/ | |
227 | /* | |
228 | * get the ID of the specified process keyring | |
229 | * - the keyring must have search permission to be found | |
230 | * - implements keyctl(KEYCTL_GET_KEYRING_ID) | |
231 | */ | |
232 | long keyctl_get_keyring_ID(key_serial_t id, int create) | |
233 | { | |
664cceb0 | 234 | key_ref_t key_ref; |
1da177e4 LT |
235 | long ret; |
236 | ||
664cceb0 DH |
237 | key_ref = lookup_user_key(NULL, id, create, 0, KEY_SEARCH); |
238 | if (IS_ERR(key_ref)) { | |
239 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
240 | goto error; |
241 | } | |
242 | ||
664cceb0 DH |
243 | ret = key_ref_to_ptr(key_ref)->serial; |
244 | key_ref_put(key_ref); | |
1da177e4 LT |
245 | error: |
246 | return ret; | |
247 | ||
248 | } /* end keyctl_get_keyring_ID() */ | |
249 | ||
250 | /*****************************************************************************/ | |
251 | /* | |
252 | * join the session keyring | |
253 | * - implements keyctl(KEYCTL_JOIN_SESSION_KEYRING) | |
254 | */ | |
255 | long keyctl_join_session_keyring(const char __user *_name) | |
256 | { | |
257 | char *name; | |
0cb409d9 | 258 | long ret; |
1da177e4 LT |
259 | |
260 | /* fetch the name from userspace */ | |
261 | name = NULL; | |
262 | if (_name) { | |
0cb409d9 DA |
263 | name = strndup_user(_name, PAGE_SIZE); |
264 | if (IS_ERR(name)) { | |
265 | ret = PTR_ERR(name); | |
1da177e4 | 266 | goto error; |
0cb409d9 | 267 | } |
1da177e4 LT |
268 | } |
269 | ||
270 | /* join the session */ | |
271 | ret = join_session_keyring(name); | |
272 | ||
1da177e4 LT |
273 | error: |
274 | return ret; | |
275 | ||
276 | } /* end keyctl_join_session_keyring() */ | |
277 | ||
278 | /*****************************************************************************/ | |
279 | /* | |
280 | * update a key's data payload | |
281 | * - the key must be writable | |
282 | * - implements keyctl(KEYCTL_UPDATE) | |
283 | */ | |
284 | long keyctl_update_key(key_serial_t id, | |
285 | const void __user *_payload, | |
286 | size_t plen) | |
287 | { | |
664cceb0 | 288 | key_ref_t key_ref; |
1da177e4 LT |
289 | void *payload; |
290 | long ret; | |
291 | ||
292 | ret = -EINVAL; | |
293 | if (plen > PAGE_SIZE) | |
294 | goto error; | |
295 | ||
296 | /* pull the payload in if one was supplied */ | |
297 | payload = NULL; | |
298 | if (_payload) { | |
299 | ret = -ENOMEM; | |
300 | payload = kmalloc(plen, GFP_KERNEL); | |
301 | if (!payload) | |
302 | goto error; | |
303 | ||
304 | ret = -EFAULT; | |
305 | if (copy_from_user(payload, _payload, plen) != 0) | |
306 | goto error2; | |
307 | } | |
308 | ||
309 | /* find the target key (which must be writable) */ | |
664cceb0 DH |
310 | key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE); |
311 | if (IS_ERR(key_ref)) { | |
312 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
313 | goto error2; |
314 | } | |
315 | ||
316 | /* update the key */ | |
664cceb0 | 317 | ret = key_update(key_ref, payload, plen); |
1da177e4 | 318 | |
664cceb0 | 319 | key_ref_put(key_ref); |
1da177e4 LT |
320 | error2: |
321 | kfree(payload); | |
322 | error: | |
323 | return ret; | |
324 | ||
325 | } /* end keyctl_update_key() */ | |
326 | ||
327 | /*****************************************************************************/ | |
328 | /* | |
329 | * revoke a key | |
330 | * - the key must be writable | |
331 | * - implements keyctl(KEYCTL_REVOKE) | |
332 | */ | |
333 | long keyctl_revoke_key(key_serial_t id) | |
334 | { | |
664cceb0 | 335 | key_ref_t key_ref; |
1da177e4 LT |
336 | long ret; |
337 | ||
664cceb0 DH |
338 | key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE); |
339 | if (IS_ERR(key_ref)) { | |
340 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
341 | goto error; |
342 | } | |
343 | ||
664cceb0 | 344 | key_revoke(key_ref_to_ptr(key_ref)); |
1da177e4 LT |
345 | ret = 0; |
346 | ||
664cceb0 | 347 | key_ref_put(key_ref); |
1da177e4 | 348 | error: |
1260f801 | 349 | return ret; |
1da177e4 LT |
350 | |
351 | } /* end keyctl_revoke_key() */ | |
352 | ||
353 | /*****************************************************************************/ | |
354 | /* | |
355 | * clear the specified process keyring | |
356 | * - the keyring must be writable | |
357 | * - implements keyctl(KEYCTL_CLEAR) | |
358 | */ | |
359 | long keyctl_keyring_clear(key_serial_t ringid) | |
360 | { | |
664cceb0 | 361 | key_ref_t keyring_ref; |
1da177e4 LT |
362 | long ret; |
363 | ||
664cceb0 DH |
364 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
365 | if (IS_ERR(keyring_ref)) { | |
366 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
367 | goto error; |
368 | } | |
369 | ||
664cceb0 | 370 | ret = keyring_clear(key_ref_to_ptr(keyring_ref)); |
1da177e4 | 371 | |
664cceb0 | 372 | key_ref_put(keyring_ref); |
1da177e4 LT |
373 | error: |
374 | return ret; | |
375 | ||
376 | } /* end keyctl_keyring_clear() */ | |
377 | ||
378 | /*****************************************************************************/ | |
379 | /* | |
380 | * link a key into a keyring | |
381 | * - the keyring must be writable | |
382 | * - the key must be linkable | |
383 | * - implements keyctl(KEYCTL_LINK) | |
384 | */ | |
385 | long keyctl_keyring_link(key_serial_t id, key_serial_t ringid) | |
386 | { | |
664cceb0 | 387 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
388 | long ret; |
389 | ||
664cceb0 DH |
390 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
391 | if (IS_ERR(keyring_ref)) { | |
392 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
393 | goto error; |
394 | } | |
395 | ||
664cceb0 DH |
396 | key_ref = lookup_user_key(NULL, id, 1, 0, KEY_LINK); |
397 | if (IS_ERR(key_ref)) { | |
398 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
399 | goto error2; |
400 | } | |
401 | ||
664cceb0 | 402 | ret = key_link(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref)); |
1da177e4 | 403 | |
664cceb0 | 404 | key_ref_put(key_ref); |
1da177e4 | 405 | error2: |
664cceb0 | 406 | key_ref_put(keyring_ref); |
1da177e4 LT |
407 | error: |
408 | return ret; | |
409 | ||
410 | } /* end keyctl_keyring_link() */ | |
411 | ||
412 | /*****************************************************************************/ | |
413 | /* | |
414 | * unlink the first attachment of a key from a keyring | |
415 | * - the keyring must be writable | |
416 | * - we don't need any permissions on the key | |
417 | * - implements keyctl(KEYCTL_UNLINK) | |
418 | */ | |
419 | long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid) | |
420 | { | |
664cceb0 | 421 | key_ref_t keyring_ref, key_ref; |
1da177e4 LT |
422 | long ret; |
423 | ||
664cceb0 DH |
424 | keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE); |
425 | if (IS_ERR(keyring_ref)) { | |
426 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
427 | goto error; |
428 | } | |
429 | ||
664cceb0 DH |
430 | key_ref = lookup_user_key(NULL, id, 0, 0, 0); |
431 | if (IS_ERR(key_ref)) { | |
432 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
433 | goto error2; |
434 | } | |
435 | ||
664cceb0 | 436 | ret = key_unlink(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref)); |
1da177e4 | 437 | |
664cceb0 | 438 | key_ref_put(key_ref); |
1da177e4 | 439 | error2: |
664cceb0 | 440 | key_ref_put(keyring_ref); |
1da177e4 LT |
441 | error: |
442 | return ret; | |
443 | ||
444 | } /* end keyctl_keyring_unlink() */ | |
445 | ||
446 | /*****************************************************************************/ | |
447 | /* | |
448 | * describe a user key | |
449 | * - the key must have view permission | |
450 | * - if there's a buffer, we place up to buflen bytes of data into it | |
451 | * - unless there's an error, we return the amount of description available, | |
452 | * irrespective of how much we may have copied | |
453 | * - the description is formatted thus: | |
454 | * type;uid;gid;perm;description<NUL> | |
455 | * - implements keyctl(KEYCTL_DESCRIBE) | |
456 | */ | |
457 | long keyctl_describe_key(key_serial_t keyid, | |
458 | char __user *buffer, | |
459 | size_t buflen) | |
460 | { | |
3e30148c | 461 | struct key *key, *instkey; |
664cceb0 | 462 | key_ref_t key_ref; |
1da177e4 LT |
463 | char *tmpbuf; |
464 | long ret; | |
465 | ||
664cceb0 DH |
466 | key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW); |
467 | if (IS_ERR(key_ref)) { | |
3e30148c DH |
468 | /* viewing a key under construction is permitted if we have the |
469 | * authorisation token handy */ | |
664cceb0 | 470 | if (PTR_ERR(key_ref) == -EACCES) { |
3e30148c DH |
471 | instkey = key_get_instantiation_authkey(keyid); |
472 | if (!IS_ERR(instkey)) { | |
473 | key_put(instkey); | |
664cceb0 DH |
474 | key_ref = lookup_user_key(NULL, keyid, |
475 | 0, 1, 0); | |
476 | if (!IS_ERR(key_ref)) | |
3e30148c DH |
477 | goto okay; |
478 | } | |
479 | } | |
480 | ||
664cceb0 | 481 | ret = PTR_ERR(key_ref); |
1da177e4 LT |
482 | goto error; |
483 | } | |
484 | ||
3e30148c | 485 | okay: |
1da177e4 LT |
486 | /* calculate how much description we're going to return */ |
487 | ret = -ENOMEM; | |
488 | tmpbuf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
489 | if (!tmpbuf) | |
490 | goto error2; | |
491 | ||
664cceb0 DH |
492 | key = key_ref_to_ptr(key_ref); |
493 | ||
1da177e4 | 494 | ret = snprintf(tmpbuf, PAGE_SIZE - 1, |
664cceb0 DH |
495 | "%s;%d;%d;%08x;%s", |
496 | key_ref_to_ptr(key_ref)->type->name, | |
497 | key_ref_to_ptr(key_ref)->uid, | |
498 | key_ref_to_ptr(key_ref)->gid, | |
499 | key_ref_to_ptr(key_ref)->perm, | |
500 | key_ref_to_ptr(key_ref)->description ? | |
501 | key_ref_to_ptr(key_ref)->description : "" | |
1da177e4 LT |
502 | ); |
503 | ||
504 | /* include a NUL char at the end of the data */ | |
505 | if (ret > PAGE_SIZE - 1) | |
506 | ret = PAGE_SIZE - 1; | |
507 | tmpbuf[ret] = 0; | |
508 | ret++; | |
509 | ||
510 | /* consider returning the data */ | |
511 | if (buffer && buflen > 0) { | |
512 | if (buflen > ret) | |
513 | buflen = ret; | |
514 | ||
515 | if (copy_to_user(buffer, tmpbuf, buflen) != 0) | |
516 | ret = -EFAULT; | |
517 | } | |
518 | ||
519 | kfree(tmpbuf); | |
520 | error2: | |
664cceb0 | 521 | key_ref_put(key_ref); |
1da177e4 LT |
522 | error: |
523 | return ret; | |
524 | ||
525 | } /* end keyctl_describe_key() */ | |
526 | ||
527 | /*****************************************************************************/ | |
528 | /* | |
529 | * search the specified keyring for a matching key | |
530 | * - the start keyring must be searchable | |
531 | * - nested keyrings may also be searched if they are searchable | |
532 | * - only keys with search permission may be found | |
533 | * - if a key is found, it will be attached to the destination keyring if | |
534 | * there's one specified | |
535 | * - implements keyctl(KEYCTL_SEARCH) | |
536 | */ | |
537 | long keyctl_keyring_search(key_serial_t ringid, | |
538 | const char __user *_type, | |
539 | const char __user *_description, | |
540 | key_serial_t destringid) | |
541 | { | |
542 | struct key_type *ktype; | |
664cceb0 | 543 | key_ref_t keyring_ref, key_ref, dest_ref; |
1da177e4 | 544 | char type[32], *description; |
0cb409d9 | 545 | long ret; |
1da177e4 LT |
546 | |
547 | /* pull the type and description into kernel space */ | |
0cb409d9 | 548 | ret = key_get_type_from_user(type, _type, sizeof(type)); |
1da177e4 LT |
549 | if (ret < 0) |
550 | goto error; | |
1da177e4 | 551 | |
0cb409d9 DA |
552 | description = strndup_user(_description, PAGE_SIZE); |
553 | if (IS_ERR(description)) { | |
554 | ret = PTR_ERR(description); | |
1da177e4 | 555 | goto error; |
0cb409d9 | 556 | } |
1da177e4 LT |
557 | |
558 | /* get the keyring at which to begin the search */ | |
664cceb0 DH |
559 | keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH); |
560 | if (IS_ERR(keyring_ref)) { | |
561 | ret = PTR_ERR(keyring_ref); | |
1da177e4 LT |
562 | goto error2; |
563 | } | |
564 | ||
565 | /* get the destination keyring if specified */ | |
664cceb0 | 566 | dest_ref = NULL; |
1da177e4 | 567 | if (destringid) { |
664cceb0 DH |
568 | dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE); |
569 | if (IS_ERR(dest_ref)) { | |
570 | ret = PTR_ERR(dest_ref); | |
1da177e4 LT |
571 | goto error3; |
572 | } | |
573 | } | |
574 | ||
575 | /* find the key type */ | |
576 | ktype = key_type_lookup(type); | |
577 | if (IS_ERR(ktype)) { | |
578 | ret = PTR_ERR(ktype); | |
579 | goto error4; | |
580 | } | |
581 | ||
582 | /* do the search */ | |
664cceb0 DH |
583 | key_ref = keyring_search(keyring_ref, ktype, description); |
584 | if (IS_ERR(key_ref)) { | |
585 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
586 | |
587 | /* treat lack or presence of a negative key the same */ | |
588 | if (ret == -EAGAIN) | |
589 | ret = -ENOKEY; | |
590 | goto error5; | |
591 | } | |
592 | ||
593 | /* link the resulting key to the destination keyring if we can */ | |
664cceb0 | 594 | if (dest_ref) { |
29db9190 DH |
595 | ret = key_permission(key_ref, KEY_LINK); |
596 | if (ret < 0) | |
1da177e4 LT |
597 | goto error6; |
598 | ||
664cceb0 | 599 | ret = key_link(key_ref_to_ptr(dest_ref), key_ref_to_ptr(key_ref)); |
1da177e4 LT |
600 | if (ret < 0) |
601 | goto error6; | |
602 | } | |
603 | ||
664cceb0 | 604 | ret = key_ref_to_ptr(key_ref)->serial; |
1da177e4 LT |
605 | |
606 | error6: | |
664cceb0 | 607 | key_ref_put(key_ref); |
1da177e4 LT |
608 | error5: |
609 | key_type_put(ktype); | |
610 | error4: | |
664cceb0 | 611 | key_ref_put(dest_ref); |
1da177e4 | 612 | error3: |
664cceb0 | 613 | key_ref_put(keyring_ref); |
1da177e4 LT |
614 | error2: |
615 | kfree(description); | |
616 | error: | |
617 | return ret; | |
618 | ||
619 | } /* end keyctl_keyring_search() */ | |
620 | ||
1da177e4 LT |
621 | /*****************************************************************************/ |
622 | /* | |
623 | * read a user key's payload | |
624 | * - the keyring must be readable or the key must be searchable from the | |
625 | * process's keyrings | |
626 | * - if there's a buffer, we place up to buflen bytes of data into it | |
627 | * - unless there's an error, we return the amount of data in the key, | |
628 | * irrespective of how much we may have copied | |
629 | * - implements keyctl(KEYCTL_READ) | |
630 | */ | |
631 | long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen) | |
632 | { | |
664cceb0 DH |
633 | struct key *key; |
634 | key_ref_t key_ref; | |
1da177e4 LT |
635 | long ret; |
636 | ||
637 | /* find the key first */ | |
664cceb0 DH |
638 | key_ref = lookup_user_key(NULL, keyid, 0, 0, 0); |
639 | if (IS_ERR(key_ref)) { | |
640 | ret = -ENOKEY; | |
641 | goto error; | |
1da177e4 LT |
642 | } |
643 | ||
664cceb0 DH |
644 | key = key_ref_to_ptr(key_ref); |
645 | ||
646 | /* see if we can read it directly */ | |
29db9190 DH |
647 | ret = key_permission(key_ref, KEY_READ); |
648 | if (ret == 0) | |
664cceb0 | 649 | goto can_read_key; |
29db9190 DH |
650 | if (ret != -EACCES) |
651 | goto error; | |
664cceb0 DH |
652 | |
653 | /* we can't; see if it's searchable from this process's keyrings | |
654 | * - we automatically take account of the fact that it may be | |
655 | * dangling off an instantiation key | |
656 | */ | |
657 | if (!is_key_possessed(key_ref)) { | |
658 | ret = -EACCES; | |
659 | goto error2; | |
660 | } | |
1da177e4 LT |
661 | |
662 | /* the key is probably readable - now try to read it */ | |
1da177e4 LT |
663 | can_read_key: |
664 | ret = key_validate(key); | |
665 | if (ret == 0) { | |
666 | ret = -EOPNOTSUPP; | |
667 | if (key->type->read) { | |
668 | /* read the data with the semaphore held (since we | |
669 | * might sleep) */ | |
670 | down_read(&key->sem); | |
671 | ret = key->type->read(key, buffer, buflen); | |
672 | up_read(&key->sem); | |
673 | } | |
674 | } | |
675 | ||
676 | error2: | |
677 | key_put(key); | |
678 | error: | |
679 | return ret; | |
680 | ||
681 | } /* end keyctl_read_key() */ | |
682 | ||
683 | /*****************************************************************************/ | |
684 | /* | |
685 | * change the ownership of a key | |
686 | * - the keyring owned by the changer | |
687 | * - if the uid or gid is -1, then that parameter is not changed | |
688 | * - implements keyctl(KEYCTL_CHOWN) | |
689 | */ | |
690 | long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid) | |
691 | { | |
5801649d | 692 | struct key_user *newowner, *zapowner = NULL; |
1da177e4 | 693 | struct key *key; |
664cceb0 | 694 | key_ref_t key_ref; |
1da177e4 LT |
695 | long ret; |
696 | ||
697 | ret = 0; | |
698 | if (uid == (uid_t) -1 && gid == (gid_t) -1) | |
699 | goto error; | |
700 | ||
29db9190 | 701 | key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); |
664cceb0 DH |
702 | if (IS_ERR(key_ref)) { |
703 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
704 | goto error; |
705 | } | |
706 | ||
664cceb0 DH |
707 | key = key_ref_to_ptr(key_ref); |
708 | ||
1da177e4 LT |
709 | /* make the changes with the locks held to prevent chown/chown races */ |
710 | ret = -EACCES; | |
711 | down_write(&key->sem); | |
1da177e4 LT |
712 | |
713 | if (!capable(CAP_SYS_ADMIN)) { | |
714 | /* only the sysadmin can chown a key to some other UID */ | |
715 | if (uid != (uid_t) -1 && key->uid != uid) | |
5801649d | 716 | goto error_put; |
1da177e4 LT |
717 | |
718 | /* only the sysadmin can set the key's GID to a group other | |
719 | * than one of those that the current process subscribes to */ | |
720 | if (gid != (gid_t) -1 && gid != key->gid && !in_group_p(gid)) | |
5801649d | 721 | goto error_put; |
1da177e4 LT |
722 | } |
723 | ||
5801649d | 724 | /* change the UID */ |
1da177e4 | 725 | if (uid != (uid_t) -1 && uid != key->uid) { |
5801649d FT |
726 | ret = -ENOMEM; |
727 | newowner = key_user_lookup(uid); | |
728 | if (!newowner) | |
729 | goto error_put; | |
730 | ||
731 | /* transfer the quota burden to the new user */ | |
732 | if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) { | |
733 | spin_lock(&newowner->lock); | |
734 | if (newowner->qnkeys + 1 >= KEYQUOTA_MAX_KEYS || | |
735 | newowner->qnbytes + key->quotalen >= | |
736 | KEYQUOTA_MAX_BYTES) | |
737 | goto quota_overrun; | |
738 | ||
739 | newowner->qnkeys++; | |
740 | newowner->qnbytes += key->quotalen; | |
741 | spin_unlock(&newowner->lock); | |
742 | ||
743 | spin_lock(&key->user->lock); | |
744 | key->user->qnkeys--; | |
745 | key->user->qnbytes -= key->quotalen; | |
746 | spin_unlock(&key->user->lock); | |
747 | } | |
748 | ||
749 | atomic_dec(&key->user->nkeys); | |
750 | atomic_inc(&newowner->nkeys); | |
751 | ||
752 | if (test_bit(KEY_FLAG_INSTANTIATED, &key->flags)) { | |
753 | atomic_dec(&key->user->nikeys); | |
754 | atomic_inc(&newowner->nikeys); | |
755 | } | |
756 | ||
757 | zapowner = key->user; | |
758 | key->user = newowner; | |
759 | key->uid = uid; | |
1da177e4 LT |
760 | } |
761 | ||
762 | /* change the GID */ | |
763 | if (gid != (gid_t) -1) | |
764 | key->gid = gid; | |
765 | ||
766 | ret = 0; | |
767 | ||
5801649d | 768 | error_put: |
1da177e4 LT |
769 | up_write(&key->sem); |
770 | key_put(key); | |
5801649d FT |
771 | if (zapowner) |
772 | key_user_put(zapowner); | |
773 | error: | |
1da177e4 LT |
774 | return ret; |
775 | ||
5801649d FT |
776 | quota_overrun: |
777 | spin_unlock(&newowner->lock); | |
778 | zapowner = newowner; | |
779 | ret = -EDQUOT; | |
780 | goto error_put; | |
781 | ||
1da177e4 LT |
782 | } /* end keyctl_chown_key() */ |
783 | ||
784 | /*****************************************************************************/ | |
785 | /* | |
786 | * change the permission mask on a key | |
787 | * - the keyring owned by the changer | |
788 | * - implements keyctl(KEYCTL_SETPERM) | |
789 | */ | |
790 | long keyctl_setperm_key(key_serial_t id, key_perm_t perm) | |
791 | { | |
792 | struct key *key; | |
664cceb0 | 793 | key_ref_t key_ref; |
1da177e4 LT |
794 | long ret; |
795 | ||
796 | ret = -EINVAL; | |
664cceb0 | 797 | if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL)) |
1da177e4 LT |
798 | goto error; |
799 | ||
29db9190 | 800 | key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); |
664cceb0 DH |
801 | if (IS_ERR(key_ref)) { |
802 | ret = PTR_ERR(key_ref); | |
1da177e4 LT |
803 | goto error; |
804 | } | |
805 | ||
664cceb0 DH |
806 | key = key_ref_to_ptr(key_ref); |
807 | ||
76d8aeab | 808 | /* make the changes with the locks held to prevent chown/chmod races */ |
1da177e4 LT |
809 | ret = -EACCES; |
810 | down_write(&key->sem); | |
1da177e4 | 811 | |
76d8aeab DH |
812 | /* if we're not the sysadmin, we can only change a key that we own */ |
813 | if (capable(CAP_SYS_ADMIN) || key->uid == current->fsuid) { | |
814 | key->perm = perm; | |
815 | ret = 0; | |
816 | } | |
1da177e4 | 817 | |
1da177e4 LT |
818 | up_write(&key->sem); |
819 | key_put(key); | |
76d8aeab | 820 | error: |
1da177e4 LT |
821 | return ret; |
822 | ||
823 | } /* end keyctl_setperm_key() */ | |
824 | ||
825 | /*****************************************************************************/ | |
826 | /* | |
827 | * instantiate the key with the specified payload, and, if one is given, link | |
828 | * the key into the keyring | |
829 | */ | |
830 | long keyctl_instantiate_key(key_serial_t id, | |
831 | const void __user *_payload, | |
832 | size_t plen, | |
833 | key_serial_t ringid) | |
834 | { | |
3e30148c | 835 | struct request_key_auth *rka; |
664cceb0 DH |
836 | struct key *instkey; |
837 | key_ref_t keyring_ref; | |
1da177e4 LT |
838 | void *payload; |
839 | long ret; | |
38bbca6b | 840 | bool vm = false; |
1da177e4 LT |
841 | |
842 | ret = -EINVAL; | |
38bbca6b | 843 | if (plen > 1024 * 1024 - 1) |
1da177e4 LT |
844 | goto error; |
845 | ||
b5f545c8 DH |
846 | /* the appropriate instantiation authorisation key must have been |
847 | * assumed before calling this */ | |
848 | ret = -EPERM; | |
849 | instkey = current->request_key_auth; | |
850 | if (!instkey) | |
851 | goto error; | |
852 | ||
853 | rka = instkey->payload.data; | |
854 | if (rka->target_key->serial != id) | |
855 | goto error; | |
856 | ||
1da177e4 LT |
857 | /* pull the payload in if one was supplied */ |
858 | payload = NULL; | |
859 | ||
860 | if (_payload) { | |
861 | ret = -ENOMEM; | |
862 | payload = kmalloc(plen, GFP_KERNEL); | |
38bbca6b DH |
863 | if (!payload) { |
864 | if (plen <= PAGE_SIZE) | |
865 | goto error; | |
866 | vm = true; | |
867 | payload = vmalloc(plen); | |
868 | if (!payload) | |
869 | goto error; | |
870 | } | |
1da177e4 LT |
871 | |
872 | ret = -EFAULT; | |
873 | if (copy_from_user(payload, _payload, plen) != 0) | |
874 | goto error2; | |
875 | } | |
876 | ||
3e30148c DH |
877 | /* find the destination keyring amongst those belonging to the |
878 | * requesting task */ | |
664cceb0 | 879 | keyring_ref = NULL; |
1da177e4 | 880 | if (ringid) { |
664cceb0 DH |
881 | keyring_ref = lookup_user_key(rka->context, ringid, 1, 0, |
882 | KEY_WRITE); | |
883 | if (IS_ERR(keyring_ref)) { | |
884 | ret = PTR_ERR(keyring_ref); | |
b5f545c8 | 885 | goto error2; |
1da177e4 LT |
886 | } |
887 | } | |
888 | ||
889 | /* instantiate the key and link it into a keyring */ | |
3e30148c | 890 | ret = key_instantiate_and_link(rka->target_key, payload, plen, |
664cceb0 | 891 | key_ref_to_ptr(keyring_ref), instkey); |
1da177e4 | 892 | |
664cceb0 | 893 | key_ref_put(keyring_ref); |
b5f545c8 DH |
894 | |
895 | /* discard the assumed authority if it's just been disabled by | |
896 | * instantiation of the key */ | |
897 | if (ret == 0) { | |
898 | key_put(current->request_key_auth); | |
899 | current->request_key_auth = NULL; | |
900 | } | |
901 | ||
902 | error2: | |
38bbca6b DH |
903 | if (!vm) |
904 | kfree(payload); | |
905 | else | |
906 | vfree(payload); | |
b5f545c8 | 907 | error: |
1da177e4 LT |
908 | return ret; |
909 | ||
910 | } /* end keyctl_instantiate_key() */ | |
911 | ||
912 | /*****************************************************************************/ | |
913 | /* | |
914 | * negatively instantiate the key with the given timeout (in seconds), and, if | |
915 | * one is given, link the key into the keyring | |
916 | */ | |
917 | long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid) | |
918 | { | |
3e30148c | 919 | struct request_key_auth *rka; |
664cceb0 DH |
920 | struct key *instkey; |
921 | key_ref_t keyring_ref; | |
1da177e4 LT |
922 | long ret; |
923 | ||
b5f545c8 DH |
924 | /* the appropriate instantiation authorisation key must have been |
925 | * assumed before calling this */ | |
926 | ret = -EPERM; | |
927 | instkey = current->request_key_auth; | |
928 | if (!instkey) | |
1da177e4 | 929 | goto error; |
1da177e4 | 930 | |
3e30148c | 931 | rka = instkey->payload.data; |
b5f545c8 DH |
932 | if (rka->target_key->serial != id) |
933 | goto error; | |
3e30148c | 934 | |
1da177e4 LT |
935 | /* find the destination keyring if present (which must also be |
936 | * writable) */ | |
664cceb0 | 937 | keyring_ref = NULL; |
1da177e4 | 938 | if (ringid) { |
664cceb0 DH |
939 | keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE); |
940 | if (IS_ERR(keyring_ref)) { | |
941 | ret = PTR_ERR(keyring_ref); | |
b5f545c8 | 942 | goto error; |
1da177e4 LT |
943 | } |
944 | } | |
945 | ||
946 | /* instantiate the key and link it into a keyring */ | |
664cceb0 DH |
947 | ret = key_negate_and_link(rka->target_key, timeout, |
948 | key_ref_to_ptr(keyring_ref), instkey); | |
1da177e4 | 949 | |
664cceb0 | 950 | key_ref_put(keyring_ref); |
b5f545c8 DH |
951 | |
952 | /* discard the assumed authority if it's just been disabled by | |
953 | * instantiation of the key */ | |
954 | if (ret == 0) { | |
955 | key_put(current->request_key_auth); | |
956 | current->request_key_auth = NULL; | |
957 | } | |
958 | ||
959 | error: | |
1da177e4 LT |
960 | return ret; |
961 | ||
962 | } /* end keyctl_negate_key() */ | |
963 | ||
3e30148c DH |
964 | /*****************************************************************************/ |
965 | /* | |
966 | * set the default keyring in which request_key() will cache keys | |
967 | * - return the old setting | |
968 | */ | |
969 | long keyctl_set_reqkey_keyring(int reqkey_defl) | |
970 | { | |
971 | int ret; | |
972 | ||
973 | switch (reqkey_defl) { | |
974 | case KEY_REQKEY_DEFL_THREAD_KEYRING: | |
975 | ret = install_thread_keyring(current); | |
976 | if (ret < 0) | |
977 | return ret; | |
978 | goto set; | |
979 | ||
980 | case KEY_REQKEY_DEFL_PROCESS_KEYRING: | |
981 | ret = install_process_keyring(current); | |
982 | if (ret < 0) | |
983 | return ret; | |
984 | ||
985 | case KEY_REQKEY_DEFL_DEFAULT: | |
986 | case KEY_REQKEY_DEFL_SESSION_KEYRING: | |
987 | case KEY_REQKEY_DEFL_USER_KEYRING: | |
988 | case KEY_REQKEY_DEFL_USER_SESSION_KEYRING: | |
989 | set: | |
990 | current->jit_keyring = reqkey_defl; | |
991 | ||
992 | case KEY_REQKEY_DEFL_NO_CHANGE: | |
993 | return current->jit_keyring; | |
994 | ||
995 | case KEY_REQKEY_DEFL_GROUP_KEYRING: | |
996 | default: | |
997 | return -EINVAL; | |
998 | } | |
999 | ||
1000 | } /* end keyctl_set_reqkey_keyring() */ | |
1001 | ||
017679c4 DH |
1002 | /*****************************************************************************/ |
1003 | /* | |
1004 | * set or clear the timeout for a key | |
1005 | */ | |
1006 | long keyctl_set_timeout(key_serial_t id, unsigned timeout) | |
1007 | { | |
1008 | struct timespec now; | |
1009 | struct key *key; | |
1010 | key_ref_t key_ref; | |
1011 | time_t expiry; | |
1012 | long ret; | |
1013 | ||
1014 | key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); | |
1015 | if (IS_ERR(key_ref)) { | |
1016 | ret = PTR_ERR(key_ref); | |
1017 | goto error; | |
1018 | } | |
1019 | ||
1020 | key = key_ref_to_ptr(key_ref); | |
1021 | ||
1022 | /* make the changes with the locks held to prevent races */ | |
1023 | down_write(&key->sem); | |
1024 | ||
1025 | expiry = 0; | |
1026 | if (timeout > 0) { | |
1027 | now = current_kernel_time(); | |
1028 | expiry = now.tv_sec + timeout; | |
1029 | } | |
1030 | ||
1031 | key->expiry = expiry; | |
1032 | ||
1033 | up_write(&key->sem); | |
1034 | key_put(key); | |
1035 | ||
1036 | ret = 0; | |
1037 | error: | |
1038 | return ret; | |
1039 | ||
1040 | } /* end keyctl_set_timeout() */ | |
1041 | ||
b5f545c8 DH |
1042 | /*****************************************************************************/ |
1043 | /* | |
1044 | * assume the authority to instantiate the specified key | |
1045 | */ | |
1046 | long keyctl_assume_authority(key_serial_t id) | |
1047 | { | |
1048 | struct key *authkey; | |
1049 | long ret; | |
1050 | ||
1051 | /* special key IDs aren't permitted */ | |
1052 | ret = -EINVAL; | |
1053 | if (id < 0) | |
1054 | goto error; | |
1055 | ||
1056 | /* we divest ourselves of authority if given an ID of 0 */ | |
1057 | if (id == 0) { | |
1058 | key_put(current->request_key_auth); | |
1059 | current->request_key_auth = NULL; | |
1060 | ret = 0; | |
1061 | goto error; | |
1062 | } | |
1063 | ||
1064 | /* attempt to assume the authority temporarily granted to us whilst we | |
1065 | * instantiate the specified key | |
1066 | * - the authorisation key must be in the current task's keyrings | |
1067 | * somewhere | |
1068 | */ | |
1069 | authkey = key_get_instantiation_authkey(id); | |
1070 | if (IS_ERR(authkey)) { | |
1071 | ret = PTR_ERR(authkey); | |
1072 | goto error; | |
1073 | } | |
1074 | ||
1075 | key_put(current->request_key_auth); | |
1076 | current->request_key_auth = authkey; | |
1077 | ret = authkey->serial; | |
1078 | ||
1079 | error: | |
1080 | return ret; | |
1081 | ||
1082 | } /* end keyctl_assume_authority() */ | |
1083 | ||
70a5bb72 DH |
1084 | /* |
1085 | * get the security label of a key | |
1086 | * - the key must grant us view permission | |
1087 | * - if there's a buffer, we place up to buflen bytes of data into it | |
1088 | * - unless there's an error, we return the amount of information available, | |
1089 | * irrespective of how much we may have copied (including the terminal NUL) | |
1090 | * - implements keyctl(KEYCTL_GET_SECURITY) | |
1091 | */ | |
1092 | long keyctl_get_security(key_serial_t keyid, | |
1093 | char __user *buffer, | |
1094 | size_t buflen) | |
1095 | { | |
1096 | struct key *key, *instkey; | |
1097 | key_ref_t key_ref; | |
1098 | char *context; | |
1099 | long ret; | |
1100 | ||
1101 | key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW); | |
1102 | if (IS_ERR(key_ref)) { | |
1103 | if (PTR_ERR(key_ref) != -EACCES) | |
1104 | return PTR_ERR(key_ref); | |
1105 | ||
1106 | /* viewing a key under construction is also permitted if we | |
1107 | * have the authorisation token handy */ | |
1108 | instkey = key_get_instantiation_authkey(keyid); | |
1109 | if (IS_ERR(instkey)) | |
1110 | return PTR_ERR(key_ref); | |
1111 | key_put(instkey); | |
1112 | ||
1113 | key_ref = lookup_user_key(NULL, keyid, 0, 1, 0); | |
1114 | if (IS_ERR(key_ref)) | |
1115 | return PTR_ERR(key_ref); | |
1116 | } | |
1117 | ||
1118 | key = key_ref_to_ptr(key_ref); | |
1119 | ret = security_key_getsecurity(key, &context); | |
1120 | if (ret == 0) { | |
1121 | /* if no information was returned, give userspace an empty | |
1122 | * string */ | |
1123 | ret = 1; | |
1124 | if (buffer && buflen > 0 && | |
1125 | copy_to_user(buffer, "", 1) != 0) | |
1126 | ret = -EFAULT; | |
1127 | } else if (ret > 0) { | |
1128 | /* return as much data as there's room for */ | |
1129 | if (buffer && buflen > 0) { | |
1130 | if (buflen > ret) | |
1131 | buflen = ret; | |
1132 | ||
1133 | if (copy_to_user(buffer, context, buflen) != 0) | |
1134 | ret = -EFAULT; | |
1135 | } | |
1136 | ||
1137 | kfree(context); | |
1138 | } | |
1139 | ||
1140 | key_ref_put(key_ref); | |
1141 | return ret; | |
1142 | } | |
1143 | ||
1da177e4 LT |
1144 | /*****************************************************************************/ |
1145 | /* | |
1146 | * the key control system call | |
1147 | */ | |
1148 | asmlinkage long sys_keyctl(int option, unsigned long arg2, unsigned long arg3, | |
1149 | unsigned long arg4, unsigned long arg5) | |
1150 | { | |
1151 | switch (option) { | |
1152 | case KEYCTL_GET_KEYRING_ID: | |
1153 | return keyctl_get_keyring_ID((key_serial_t) arg2, | |
1154 | (int) arg3); | |
1155 | ||
1156 | case KEYCTL_JOIN_SESSION_KEYRING: | |
1157 | return keyctl_join_session_keyring((const char __user *) arg2); | |
1158 | ||
1159 | case KEYCTL_UPDATE: | |
1160 | return keyctl_update_key((key_serial_t) arg2, | |
1161 | (const void __user *) arg3, | |
1162 | (size_t) arg4); | |
1163 | ||
1164 | case KEYCTL_REVOKE: | |
1165 | return keyctl_revoke_key((key_serial_t) arg2); | |
1166 | ||
1167 | case KEYCTL_DESCRIBE: | |
1168 | return keyctl_describe_key((key_serial_t) arg2, | |
1169 | (char __user *) arg3, | |
1170 | (unsigned) arg4); | |
1171 | ||
1172 | case KEYCTL_CLEAR: | |
1173 | return keyctl_keyring_clear((key_serial_t) arg2); | |
1174 | ||
1175 | case KEYCTL_LINK: | |
1176 | return keyctl_keyring_link((key_serial_t) arg2, | |
1177 | (key_serial_t) arg3); | |
1178 | ||
1179 | case KEYCTL_UNLINK: | |
1180 | return keyctl_keyring_unlink((key_serial_t) arg2, | |
1181 | (key_serial_t) arg3); | |
1182 | ||
1183 | case KEYCTL_SEARCH: | |
1184 | return keyctl_keyring_search((key_serial_t) arg2, | |
1185 | (const char __user *) arg3, | |
1186 | (const char __user *) arg4, | |
1187 | (key_serial_t) arg5); | |
1188 | ||
1189 | case KEYCTL_READ: | |
1190 | return keyctl_read_key((key_serial_t) arg2, | |
1191 | (char __user *) arg3, | |
1192 | (size_t) arg4); | |
1193 | ||
1194 | case KEYCTL_CHOWN: | |
1195 | return keyctl_chown_key((key_serial_t) arg2, | |
1196 | (uid_t) arg3, | |
1197 | (gid_t) arg4); | |
1198 | ||
1199 | case KEYCTL_SETPERM: | |
1200 | return keyctl_setperm_key((key_serial_t) arg2, | |
1201 | (key_perm_t) arg3); | |
1202 | ||
1203 | case KEYCTL_INSTANTIATE: | |
1204 | return keyctl_instantiate_key((key_serial_t) arg2, | |
1205 | (const void __user *) arg3, | |
1206 | (size_t) arg4, | |
1207 | (key_serial_t) arg5); | |
1208 | ||
1209 | case KEYCTL_NEGATE: | |
1210 | return keyctl_negate_key((key_serial_t) arg2, | |
1211 | (unsigned) arg3, | |
1212 | (key_serial_t) arg4); | |
1213 | ||
3e30148c DH |
1214 | case KEYCTL_SET_REQKEY_KEYRING: |
1215 | return keyctl_set_reqkey_keyring(arg2); | |
1216 | ||
017679c4 DH |
1217 | case KEYCTL_SET_TIMEOUT: |
1218 | return keyctl_set_timeout((key_serial_t) arg2, | |
1219 | (unsigned) arg3); | |
1220 | ||
b5f545c8 DH |
1221 | case KEYCTL_ASSUME_AUTHORITY: |
1222 | return keyctl_assume_authority((key_serial_t) arg2); | |
1223 | ||
70a5bb72 DH |
1224 | case KEYCTL_GET_SECURITY: |
1225 | return keyctl_get_security((key_serial_t) arg2, | |
1226 | (char *) arg3, | |
1227 | (size_t) arg4); | |
1228 | ||
1da177e4 LT |
1229 | default: |
1230 | return -EOPNOTSUPP; | |
1231 | } | |
1232 | ||
1233 | } /* end sys_keyctl() */ |