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Commit | Line | Data |
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76181c13 | 1 | /* Request a key from userspace |
1da177e4 | 2 | * |
76181c13 | 3 | * Copyright (C) 2004-2007 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. | |
f1a9badc DH |
10 | * |
11 | * See Documentation/keys-request-key.txt | |
1da177e4 LT |
12 | */ |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/kmod.h> | |
17 | #include <linux/err.h> | |
3e30148c | 18 | #include <linux/keyctl.h> |
fdb89bce | 19 | #include <linux/slab.h> |
1da177e4 LT |
20 | #include "internal.h" |
21 | ||
e9e349b0 DH |
22 | #define key_negative_timeout 60 /* default timeout on a negative key's existence */ |
23 | ||
76181c13 DH |
24 | /* |
25 | * wait_on_bit() sleep function for uninterruptible waiting | |
26 | */ | |
27 | static int key_wait_bit(void *flags) | |
28 | { | |
29 | schedule(); | |
30 | return 0; | |
31 | } | |
32 | ||
33 | /* | |
34 | * wait_on_bit() sleep function for interruptible waiting | |
35 | */ | |
36 | static int key_wait_bit_intr(void *flags) | |
37 | { | |
38 | schedule(); | |
39 | return signal_pending(current) ? -ERESTARTSYS : 0; | |
40 | } | |
41 | ||
42 | /* | |
43 | * call to complete the construction of a key | |
44 | */ | |
45 | void complete_request_key(struct key_construction *cons, int error) | |
46 | { | |
47 | kenter("{%d,%d},%d", cons->key->serial, cons->authkey->serial, error); | |
1da177e4 | 48 | |
76181c13 DH |
49 | if (error < 0) |
50 | key_negate_and_link(cons->key, key_negative_timeout, NULL, | |
51 | cons->authkey); | |
52 | else | |
53 | key_revoke(cons->authkey); | |
54 | ||
55 | key_put(cons->key); | |
56 | key_put(cons->authkey); | |
57 | kfree(cons); | |
58 | } | |
59 | EXPORT_SYMBOL(complete_request_key); | |
1da177e4 | 60 | |
1da177e4 LT |
61 | /* |
62 | * request userspace finish the construction of a key | |
b5f545c8 | 63 | * - execute "/sbin/request-key <op> <key> <uid> <gid> <keyring> <keyring> <keyring>" |
1da177e4 | 64 | */ |
76181c13 | 65 | static int call_sbin_request_key(struct key_construction *cons, |
4e54f085 DH |
66 | const char *op, |
67 | void *aux) | |
1da177e4 LT |
68 | { |
69 | struct task_struct *tsk = current; | |
1da177e4 | 70 | key_serial_t prkey, sskey; |
76181c13 | 71 | struct key *key = cons->key, *authkey = cons->authkey, *keyring; |
b5f545c8 | 72 | char *argv[9], *envp[3], uid_str[12], gid_str[12]; |
1da177e4 | 73 | char key_str[12], keyring_str[3][12]; |
b5f545c8 | 74 | char desc[20]; |
3e30148c DH |
75 | int ret, i; |
76 | ||
b5f545c8 | 77 | kenter("{%d},{%d},%s", key->serial, authkey->serial, op); |
3e30148c | 78 | |
8bbf4976 DH |
79 | ret = install_user_keyrings(); |
80 | if (ret < 0) | |
81 | goto error_alloc; | |
82 | ||
b5f545c8 DH |
83 | /* allocate a new session keyring */ |
84 | sprintf(desc, "_req.%u", key->serial); | |
85 | ||
47d804bf | 86 | keyring = keyring_alloc(desc, current_fsuid(), current_fsgid(), current, |
7e047ef5 | 87 | KEY_ALLOC_QUOTA_OVERRUN, NULL); |
b5f545c8 DH |
88 | if (IS_ERR(keyring)) { |
89 | ret = PTR_ERR(keyring); | |
90 | goto error_alloc; | |
3e30148c | 91 | } |
1da177e4 | 92 | |
b5f545c8 DH |
93 | /* attach the auth key to the session keyring */ |
94 | ret = __key_link(keyring, authkey); | |
95 | if (ret < 0) | |
96 | goto error_link; | |
97 | ||
1da177e4 | 98 | /* record the UID and GID */ |
47d804bf DH |
99 | sprintf(uid_str, "%d", current_fsuid()); |
100 | sprintf(gid_str, "%d", current_fsgid()); | |
1da177e4 LT |
101 | |
102 | /* we say which key is under construction */ | |
103 | sprintf(key_str, "%d", key->serial); | |
104 | ||
105 | /* we specify the process's default keyrings */ | |
106 | sprintf(keyring_str[0], "%d", | |
b6dff3ec DH |
107 | tsk->cred->thread_keyring ? |
108 | tsk->cred->thread_keyring->serial : 0); | |
1da177e4 LT |
109 | |
110 | prkey = 0; | |
111 | if (tsk->signal->process_keyring) | |
112 | prkey = tsk->signal->process_keyring->serial; | |
113 | ||
3e30148c | 114 | sprintf(keyring_str[1], "%d", prkey); |
1da177e4 | 115 | |
3e30148c DH |
116 | if (tsk->signal->session_keyring) { |
117 | rcu_read_lock(); | |
118 | sskey = rcu_dereference(tsk->signal->session_keyring)->serial; | |
119 | rcu_read_unlock(); | |
76181c13 | 120 | } else { |
b6dff3ec | 121 | sskey = tsk->cred->user->session_keyring->serial; |
3e30148c | 122 | } |
1da177e4 | 123 | |
1da177e4 LT |
124 | sprintf(keyring_str[2], "%d", sskey); |
125 | ||
126 | /* set up a minimal environment */ | |
127 | i = 0; | |
128 | envp[i++] = "HOME=/"; | |
129 | envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
130 | envp[i] = NULL; | |
131 | ||
132 | /* set up the argument list */ | |
133 | i = 0; | |
134 | argv[i++] = "/sbin/request-key"; | |
135 | argv[i++] = (char *) op; | |
136 | argv[i++] = key_str; | |
137 | argv[i++] = uid_str; | |
138 | argv[i++] = gid_str; | |
139 | argv[i++] = keyring_str[0]; | |
140 | argv[i++] = keyring_str[1]; | |
141 | argv[i++] = keyring_str[2]; | |
1da177e4 LT |
142 | argv[i] = NULL; |
143 | ||
144 | /* do it */ | |
86313c48 JF |
145 | ret = call_usermodehelper_keys(argv[0], argv, envp, keyring, |
146 | UMH_WAIT_PROC); | |
76181c13 DH |
147 | kdebug("usermode -> 0x%x", ret); |
148 | if (ret >= 0) { | |
149 | /* ret is the exit/wait code */ | |
150 | if (test_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags) || | |
151 | key_validate(key) < 0) | |
152 | ret = -ENOKEY; | |
153 | else | |
154 | /* ignore any errors from userspace if the key was | |
155 | * instantiated */ | |
156 | ret = 0; | |
157 | } | |
3e30148c | 158 | |
b5f545c8 DH |
159 | error_link: |
160 | key_put(keyring); | |
3e30148c | 161 | |
b5f545c8 | 162 | error_alloc: |
3e30148c | 163 | kleave(" = %d", ret); |
76181c13 | 164 | complete_request_key(cons, ret); |
3e30148c | 165 | return ret; |
76181c13 | 166 | } |
1da177e4 | 167 | |
1da177e4 | 168 | /* |
76181c13 | 169 | * call out to userspace for key construction |
1da177e4 LT |
170 | * - we ignore program failure and go on key status instead |
171 | */ | |
4a38e122 | 172 | static int construct_key(struct key *key, const void *callout_info, |
8bbf4976 DH |
173 | size_t callout_len, void *aux, |
174 | struct key *dest_keyring) | |
1da177e4 | 175 | { |
76181c13 | 176 | struct key_construction *cons; |
b5f545c8 | 177 | request_key_actor_t actor; |
76181c13 DH |
178 | struct key *authkey; |
179 | int ret; | |
1da177e4 | 180 | |
4a38e122 | 181 | kenter("%d,%p,%zu,%p", key->serial, callout_info, callout_len, aux); |
3e30148c | 182 | |
76181c13 DH |
183 | cons = kmalloc(sizeof(*cons), GFP_KERNEL); |
184 | if (!cons) | |
185 | return -ENOMEM; | |
1da177e4 | 186 | |
b5f545c8 | 187 | /* allocate an authorisation key */ |
8bbf4976 DH |
188 | authkey = request_key_auth_new(key, callout_info, callout_len, |
189 | dest_keyring); | |
b5f545c8 | 190 | if (IS_ERR(authkey)) { |
76181c13 | 191 | kfree(cons); |
b5f545c8 DH |
192 | ret = PTR_ERR(authkey); |
193 | authkey = NULL; | |
76181c13 DH |
194 | } else { |
195 | cons->authkey = key_get(authkey); | |
196 | cons->key = key_get(key); | |
197 | ||
198 | /* make the call */ | |
199 | actor = call_sbin_request_key; | |
200 | if (key->type->request_key) | |
201 | actor = key->type->request_key; | |
202 | ||
203 | ret = actor(cons, "create", aux); | |
204 | ||
205 | /* check that the actor called complete_request_key() prior to | |
206 | * returning an error */ | |
207 | WARN_ON(ret < 0 && | |
208 | !test_bit(KEY_FLAG_REVOKED, &authkey->flags)); | |
209 | key_put(authkey); | |
1da177e4 LT |
210 | } |
211 | ||
76181c13 DH |
212 | kleave(" = %d", ret); |
213 | return ret; | |
214 | } | |
1da177e4 | 215 | |
3e30148c | 216 | /* |
8bbf4976 DH |
217 | * get the appropriate destination keyring for the request |
218 | * - we return whatever keyring we select with an extra reference upon it which | |
219 | * the caller must release | |
3e30148c | 220 | */ |
8bbf4976 | 221 | static void construct_get_dest_keyring(struct key **_dest_keyring) |
3e30148c | 222 | { |
8bbf4976 | 223 | struct request_key_auth *rka; |
3e30148c | 224 | struct task_struct *tsk = current; |
8bbf4976 | 225 | struct key *dest_keyring = *_dest_keyring, *authkey; |
3e30148c | 226 | |
8bbf4976 | 227 | kenter("%p", dest_keyring); |
3e30148c DH |
228 | |
229 | /* find the appropriate keyring */ | |
8bbf4976 DH |
230 | if (dest_keyring) { |
231 | /* the caller supplied one */ | |
232 | key_get(dest_keyring); | |
233 | } else { | |
234 | /* use a default keyring; falling through the cases until we | |
235 | * find one that we actually have */ | |
b6dff3ec | 236 | switch (tsk->cred->jit_keyring) { |
3e30148c | 237 | case KEY_REQKEY_DEFL_DEFAULT: |
8bbf4976 | 238 | case KEY_REQKEY_DEFL_REQUESTOR_KEYRING: |
b6dff3ec DH |
239 | if (tsk->cred->request_key_auth) { |
240 | authkey = tsk->cred->request_key_auth; | |
8bbf4976 DH |
241 | down_read(&authkey->sem); |
242 | rka = authkey->payload.data; | |
243 | if (!test_bit(KEY_FLAG_REVOKED, | |
244 | &authkey->flags)) | |
245 | dest_keyring = | |
246 | key_get(rka->dest_keyring); | |
247 | up_read(&authkey->sem); | |
248 | if (dest_keyring) | |
249 | break; | |
250 | } | |
251 | ||
3e30148c | 252 | case KEY_REQKEY_DEFL_THREAD_KEYRING: |
b6dff3ec | 253 | dest_keyring = key_get(tsk->cred->thread_keyring); |
3e30148c DH |
254 | if (dest_keyring) |
255 | break; | |
256 | ||
257 | case KEY_REQKEY_DEFL_PROCESS_KEYRING: | |
8bbf4976 | 258 | dest_keyring = key_get(tsk->signal->process_keyring); |
3e30148c DH |
259 | if (dest_keyring) |
260 | break; | |
261 | ||
262 | case KEY_REQKEY_DEFL_SESSION_KEYRING: | |
263 | rcu_read_lock(); | |
264 | dest_keyring = key_get( | |
265 | rcu_dereference(tsk->signal->session_keyring)); | |
266 | rcu_read_unlock(); | |
3e30148c DH |
267 | |
268 | if (dest_keyring) | |
269 | break; | |
270 | ||
271 | case KEY_REQKEY_DEFL_USER_SESSION_KEYRING: | |
b6dff3ec DH |
272 | dest_keyring = |
273 | key_get(tsk->cred->user->session_keyring); | |
3e30148c DH |
274 | break; |
275 | ||
276 | case KEY_REQKEY_DEFL_USER_KEYRING: | |
b6dff3ec | 277 | dest_keyring = key_get(tsk->cred->user->uid_keyring); |
3e30148c DH |
278 | break; |
279 | ||
280 | case KEY_REQKEY_DEFL_GROUP_KEYRING: | |
281 | default: | |
282 | BUG(); | |
283 | } | |
284 | } | |
285 | ||
8bbf4976 DH |
286 | *_dest_keyring = dest_keyring; |
287 | kleave(" [dk %d]", key_serial(dest_keyring)); | |
288 | return; | |
76181c13 | 289 | } |
3e30148c | 290 | |
76181c13 DH |
291 | /* |
292 | * allocate a new key in under-construction state and attempt to link it in to | |
293 | * the requested place | |
294 | * - may return a key that's already under construction instead | |
295 | */ | |
296 | static int construct_alloc_key(struct key_type *type, | |
297 | const char *description, | |
298 | struct key *dest_keyring, | |
299 | unsigned long flags, | |
300 | struct key_user *user, | |
301 | struct key **_key) | |
302 | { | |
303 | struct key *key; | |
304 | key_ref_t key_ref; | |
305 | ||
306 | kenter("%s,%s,,,", type->name, description); | |
307 | ||
308 | mutex_lock(&user->cons_lock); | |
309 | ||
310 | key = key_alloc(type, description, | |
47d804bf | 311 | current_fsuid(), current_fsgid(), current, KEY_POS_ALL, |
76181c13 DH |
312 | flags); |
313 | if (IS_ERR(key)) | |
314 | goto alloc_failed; | |
315 | ||
316 | set_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags); | |
317 | ||
8bbf4976 | 318 | down_write(&dest_keyring->sem); |
76181c13 DH |
319 | |
320 | /* attach the key to the destination keyring under lock, but we do need | |
321 | * to do another check just in case someone beat us to it whilst we | |
322 | * waited for locks */ | |
323 | mutex_lock(&key_construction_mutex); | |
324 | ||
325 | key_ref = search_process_keyrings(type, description, type->match, | |
326 | current); | |
327 | if (!IS_ERR(key_ref)) | |
328 | goto key_already_present; | |
329 | ||
8bbf4976 | 330 | __key_link(dest_keyring, key); |
76181c13 DH |
331 | |
332 | mutex_unlock(&key_construction_mutex); | |
8bbf4976 | 333 | up_write(&dest_keyring->sem); |
76181c13 DH |
334 | mutex_unlock(&user->cons_lock); |
335 | *_key = key; | |
336 | kleave(" = 0 [%d]", key_serial(key)); | |
337 | return 0; | |
338 | ||
339 | key_already_present: | |
340 | mutex_unlock(&key_construction_mutex); | |
341 | if (dest_keyring) | |
342 | up_write(&dest_keyring->sem); | |
343 | mutex_unlock(&user->cons_lock); | |
344 | key_put(key); | |
345 | *_key = key = key_ref_to_ptr(key_ref); | |
346 | kleave(" = -EINPROGRESS [%d]", key_serial(key)); | |
347 | return -EINPROGRESS; | |
348 | ||
349 | alloc_failed: | |
350 | mutex_unlock(&user->cons_lock); | |
351 | *_key = NULL; | |
352 | kleave(" = %ld", PTR_ERR(key)); | |
353 | return PTR_ERR(key); | |
354 | } | |
355 | ||
356 | /* | |
357 | * commence key construction | |
358 | */ | |
359 | static struct key *construct_key_and_link(struct key_type *type, | |
360 | const char *description, | |
361 | const char *callout_info, | |
4a38e122 | 362 | size_t callout_len, |
76181c13 DH |
363 | void *aux, |
364 | struct key *dest_keyring, | |
365 | unsigned long flags) | |
366 | { | |
367 | struct key_user *user; | |
368 | struct key *key; | |
369 | int ret; | |
370 | ||
47d804bf | 371 | user = key_user_lookup(current_fsuid()); |
76181c13 DH |
372 | if (!user) |
373 | return ERR_PTR(-ENOMEM); | |
374 | ||
8bbf4976 DH |
375 | construct_get_dest_keyring(&dest_keyring); |
376 | ||
76181c13 DH |
377 | ret = construct_alloc_key(type, description, dest_keyring, flags, user, |
378 | &key); | |
379 | key_user_put(user); | |
380 | ||
381 | if (ret == 0) { | |
8bbf4976 DH |
382 | ret = construct_key(key, callout_info, callout_len, aux, |
383 | dest_keyring); | |
76181c13 DH |
384 | if (ret < 0) |
385 | goto construction_failed; | |
386 | } | |
387 | ||
8bbf4976 | 388 | key_put(dest_keyring); |
76181c13 DH |
389 | return key; |
390 | ||
391 | construction_failed: | |
392 | key_negate_and_link(key, key_negative_timeout, NULL, NULL); | |
393 | key_put(key); | |
8bbf4976 | 394 | key_put(dest_keyring); |
76181c13 DH |
395 | return ERR_PTR(ret); |
396 | } | |
3e30148c | 397 | |
1da177e4 LT |
398 | /* |
399 | * request a key | |
400 | * - search the process's keyrings | |
401 | * - check the list of keys being created or updated | |
3e30148c DH |
402 | * - call out to userspace for a key if supplementary info was provided |
403 | * - cache the key in an appropriate keyring | |
1da177e4 | 404 | */ |
3e30148c DH |
405 | struct key *request_key_and_link(struct key_type *type, |
406 | const char *description, | |
4a38e122 DH |
407 | const void *callout_info, |
408 | size_t callout_len, | |
4e54f085 | 409 | void *aux, |
7e047ef5 DH |
410 | struct key *dest_keyring, |
411 | unsigned long flags) | |
1da177e4 | 412 | { |
1da177e4 | 413 | struct key *key; |
664cceb0 | 414 | key_ref_t key_ref; |
1da177e4 | 415 | |
4a38e122 DH |
416 | kenter("%s,%s,%p,%zu,%p,%p,%lx", |
417 | type->name, description, callout_info, callout_len, aux, | |
4e54f085 | 418 | dest_keyring, flags); |
3e30148c | 419 | |
1da177e4 | 420 | /* search all the process keyrings for a key */ |
664cceb0 DH |
421 | key_ref = search_process_keyrings(type, description, type->match, |
422 | current); | |
1da177e4 | 423 | |
664cceb0 DH |
424 | if (!IS_ERR(key_ref)) { |
425 | key = key_ref_to_ptr(key_ref); | |
76181c13 | 426 | } else if (PTR_ERR(key_ref) != -EAGAIN) { |
e231c2ee | 427 | key = ERR_CAST(key_ref); |
76181c13 | 428 | } else { |
1da177e4 LT |
429 | /* the search failed, but the keyrings were searchable, so we |
430 | * should consult userspace if we can */ | |
431 | key = ERR_PTR(-ENOKEY); | |
432 | if (!callout_info) | |
433 | goto error; | |
434 | ||
76181c13 | 435 | key = construct_key_and_link(type, description, callout_info, |
4a38e122 DH |
436 | callout_len, aux, dest_keyring, |
437 | flags); | |
1da177e4 LT |
438 | } |
439 | ||
3e30148c DH |
440 | error: |
441 | kleave(" = %p", key); | |
1da177e4 | 442 | return key; |
76181c13 | 443 | } |
1da177e4 | 444 | |
76181c13 DH |
445 | /* |
446 | * wait for construction of a key to complete | |
447 | */ | |
448 | int wait_for_key_construction(struct key *key, bool intr) | |
449 | { | |
450 | int ret; | |
3e30148c | 451 | |
76181c13 DH |
452 | ret = wait_on_bit(&key->flags, KEY_FLAG_USER_CONSTRUCT, |
453 | intr ? key_wait_bit_intr : key_wait_bit, | |
454 | intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); | |
455 | if (ret < 0) | |
456 | return ret; | |
457 | return key_validate(key); | |
458 | } | |
459 | EXPORT_SYMBOL(wait_for_key_construction); | |
3e30148c | 460 | |
3e30148c DH |
461 | /* |
462 | * request a key | |
463 | * - search the process's keyrings | |
464 | * - check the list of keys being created or updated | |
465 | * - call out to userspace for a key if supplementary info was provided | |
76181c13 | 466 | * - waits uninterruptible for creation to complete |
3e30148c DH |
467 | */ |
468 | struct key *request_key(struct key_type *type, | |
469 | const char *description, | |
470 | const char *callout_info) | |
471 | { | |
76181c13 | 472 | struct key *key; |
4a38e122 | 473 | size_t callout_len = 0; |
76181c13 DH |
474 | int ret; |
475 | ||
4a38e122 DH |
476 | if (callout_info) |
477 | callout_len = strlen(callout_info); | |
478 | key = request_key_and_link(type, description, callout_info, callout_len, | |
479 | NULL, NULL, KEY_ALLOC_IN_QUOTA); | |
76181c13 DH |
480 | if (!IS_ERR(key)) { |
481 | ret = wait_for_key_construction(key, false); | |
482 | if (ret < 0) { | |
483 | key_put(key); | |
484 | return ERR_PTR(ret); | |
485 | } | |
486 | } | |
487 | return key; | |
488 | } | |
1da177e4 | 489 | EXPORT_SYMBOL(request_key); |
4e54f085 | 490 | |
4e54f085 DH |
491 | /* |
492 | * request a key with auxiliary data for the upcaller | |
493 | * - search the process's keyrings | |
494 | * - check the list of keys being created or updated | |
495 | * - call out to userspace for a key if supplementary info was provided | |
76181c13 | 496 | * - waits uninterruptible for creation to complete |
4e54f085 DH |
497 | */ |
498 | struct key *request_key_with_auxdata(struct key_type *type, | |
499 | const char *description, | |
4a38e122 DH |
500 | const void *callout_info, |
501 | size_t callout_len, | |
4e54f085 DH |
502 | void *aux) |
503 | { | |
76181c13 DH |
504 | struct key *key; |
505 | int ret; | |
506 | ||
4a38e122 DH |
507 | key = request_key_and_link(type, description, callout_info, callout_len, |
508 | aux, NULL, KEY_ALLOC_IN_QUOTA); | |
76181c13 DH |
509 | if (!IS_ERR(key)) { |
510 | ret = wait_for_key_construction(key, false); | |
511 | if (ret < 0) { | |
512 | key_put(key); | |
513 | return ERR_PTR(ret); | |
514 | } | |
515 | } | |
516 | return key; | |
517 | } | |
518 | EXPORT_SYMBOL(request_key_with_auxdata); | |
4e54f085 | 519 | |
76181c13 DH |
520 | /* |
521 | * request a key (allow async construction) | |
522 | * - search the process's keyrings | |
523 | * - check the list of keys being created or updated | |
524 | * - call out to userspace for a key if supplementary info was provided | |
525 | */ | |
526 | struct key *request_key_async(struct key_type *type, | |
527 | const char *description, | |
4a38e122 DH |
528 | const void *callout_info, |
529 | size_t callout_len) | |
76181c13 | 530 | { |
4a38e122 DH |
531 | return request_key_and_link(type, description, callout_info, |
532 | callout_len, NULL, NULL, | |
533 | KEY_ALLOC_IN_QUOTA); | |
76181c13 DH |
534 | } |
535 | EXPORT_SYMBOL(request_key_async); | |
4e54f085 | 536 | |
76181c13 DH |
537 | /* |
538 | * request a key with auxiliary data for the upcaller (allow async construction) | |
539 | * - search the process's keyrings | |
540 | * - check the list of keys being created or updated | |
541 | * - call out to userspace for a key if supplementary info was provided | |
542 | */ | |
543 | struct key *request_key_async_with_auxdata(struct key_type *type, | |
544 | const char *description, | |
4a38e122 DH |
545 | const void *callout_info, |
546 | size_t callout_len, | |
76181c13 DH |
547 | void *aux) |
548 | { | |
4a38e122 DH |
549 | return request_key_and_link(type, description, callout_info, |
550 | callout_len, aux, NULL, KEY_ALLOC_IN_QUOTA); | |
76181c13 DH |
551 | } |
552 | EXPORT_SYMBOL(request_key_async_with_auxdata); |