1 /* keyctl.c: userspace keyctl operations
3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
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>
19 #include <linux/capability.h>
20 #include <linux/string.h>
21 #include <linux/err.h>
22 #include <linux/vmalloc.h>
23 #include <linux/security.h>
24 #include <asm/uaccess.h>
27 static int key_get_type_from_user(char *type,
28 const char __user *_type,
33 ret = strncpy_from_user(type, _type, len);
38 if (ret == 0 || ret >= len)
49 /*****************************************************************************/
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()
57 asmlinkage long sys_add_key(const char __user *_type,
58 const char __user *_description,
59 const void __user *_payload,
63 key_ref_t keyring_ref, key_ref;
64 char type[32], *description;
70 if (plen > 1024 * 1024 - 1)
73 /* draw all the data into kernel space */
74 ret = key_get_type_from_user(type, _type, sizeof(type));
78 description = strndup_user(_description, PAGE_SIZE);
79 if (IS_ERR(description)) {
80 ret = PTR_ERR(description);
84 /* pull the payload in if one was supplied */
90 payload = kmalloc(plen, GFP_KERNEL);
92 if (plen <= PAGE_SIZE)
95 payload = vmalloc(plen);
101 if (copy_from_user(payload, _payload, plen) != 0)
105 /* find the target keyring (which must be writable) */
106 keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
107 if (IS_ERR(keyring_ref)) {
108 ret = PTR_ERR(keyring_ref);
112 /* create or update the requested key and add it to the target
114 key_ref = key_create_or_update(keyring_ref, type, description,
115 payload, plen, KEY_PERM_UNDEF,
117 if (!IS_ERR(key_ref)) {
118 ret = key_ref_to_ptr(key_ref)->serial;
119 key_ref_put(key_ref);
122 ret = PTR_ERR(key_ref);
125 key_ref_put(keyring_ref);
136 } /* end sys_add_key() */
138 /*****************************************************************************/
140 * search the process keyrings for a matching key
141 * - nested keyrings may also be searched if they have Search permission
142 * - if a key is found, it will be attached to the destination keyring if
143 * there's one specified
144 * - /sbin/request-key will be invoked if _callout_info is non-NULL
145 * - the _callout_info string will be passed to /sbin/request-key
146 * - if the _callout_info string is empty, it will be rendered as "-"
147 * - implements request_key()
149 asmlinkage long sys_request_key(const char __user *_type,
150 const char __user *_description,
151 const char __user *_callout_info,
152 key_serial_t destringid)
154 struct key_type *ktype;
158 char type[32], *description, *callout_info;
161 /* pull the type into kernel space */
162 ret = key_get_type_from_user(type, _type, sizeof(type));
166 /* pull the description into kernel space */
167 description = strndup_user(_description, PAGE_SIZE);
168 if (IS_ERR(description)) {
169 ret = PTR_ERR(description);
173 /* pull the callout info into kernel space */
177 callout_info = strndup_user(_callout_info, PAGE_SIZE);
178 if (IS_ERR(callout_info)) {
179 ret = PTR_ERR(callout_info);
182 callout_len = strlen(callout_info);
185 /* get the destination keyring if specified */
188 dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
189 if (IS_ERR(dest_ref)) {
190 ret = PTR_ERR(dest_ref);
195 /* find the key type */
196 ktype = key_type_lookup(type);
198 ret = PTR_ERR(ktype);
203 key = request_key_and_link(ktype, description, callout_info,
204 callout_len, NULL, key_ref_to_ptr(dest_ref),
217 key_ref_put(dest_ref);
225 } /* end sys_request_key() */
227 /*****************************************************************************/
229 * get the ID of the specified process keyring
230 * - the keyring must have search permission to be found
231 * - implements keyctl(KEYCTL_GET_KEYRING_ID)
233 long keyctl_get_keyring_ID(key_serial_t id, int create)
238 key_ref = lookup_user_key(NULL, id, create, 0, KEY_SEARCH);
239 if (IS_ERR(key_ref)) {
240 ret = PTR_ERR(key_ref);
244 ret = key_ref_to_ptr(key_ref)->serial;
245 key_ref_put(key_ref);
249 } /* end keyctl_get_keyring_ID() */
251 /*****************************************************************************/
253 * join the session keyring
254 * - implements keyctl(KEYCTL_JOIN_SESSION_KEYRING)
256 long keyctl_join_session_keyring(const char __user *_name)
261 /* fetch the name from userspace */
264 name = strndup_user(_name, PAGE_SIZE);
271 /* join the session */
272 ret = join_session_keyring(name);
277 } /* end keyctl_join_session_keyring() */
279 /*****************************************************************************/
281 * update a key's data payload
282 * - the key must be writable
283 * - implements keyctl(KEYCTL_UPDATE)
285 long keyctl_update_key(key_serial_t id,
286 const void __user *_payload,
294 if (plen > PAGE_SIZE)
297 /* pull the payload in if one was supplied */
301 payload = kmalloc(plen, GFP_KERNEL);
306 if (copy_from_user(payload, _payload, plen) != 0)
310 /* find the target key (which must be writable) */
311 key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
312 if (IS_ERR(key_ref)) {
313 ret = PTR_ERR(key_ref);
318 ret = key_update(key_ref, payload, plen);
320 key_ref_put(key_ref);
326 } /* end keyctl_update_key() */
328 /*****************************************************************************/
331 * - the key must be writable
332 * - implements keyctl(KEYCTL_REVOKE)
334 long keyctl_revoke_key(key_serial_t id)
339 key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
340 if (IS_ERR(key_ref)) {
341 ret = PTR_ERR(key_ref);
345 key_revoke(key_ref_to_ptr(key_ref));
348 key_ref_put(key_ref);
352 } /* end keyctl_revoke_key() */
354 /*****************************************************************************/
356 * clear the specified process keyring
357 * - the keyring must be writable
358 * - implements keyctl(KEYCTL_CLEAR)
360 long keyctl_keyring_clear(key_serial_t ringid)
362 key_ref_t keyring_ref;
365 keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
366 if (IS_ERR(keyring_ref)) {
367 ret = PTR_ERR(keyring_ref);
371 ret = keyring_clear(key_ref_to_ptr(keyring_ref));
373 key_ref_put(keyring_ref);
377 } /* end keyctl_keyring_clear() */
379 /*****************************************************************************/
381 * link a key into a keyring
382 * - the keyring must be writable
383 * - the key must be linkable
384 * - implements keyctl(KEYCTL_LINK)
386 long keyctl_keyring_link(key_serial_t id, key_serial_t ringid)
388 key_ref_t keyring_ref, key_ref;
391 keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
392 if (IS_ERR(keyring_ref)) {
393 ret = PTR_ERR(keyring_ref);
397 key_ref = lookup_user_key(NULL, id, 1, 0, KEY_LINK);
398 if (IS_ERR(key_ref)) {
399 ret = PTR_ERR(key_ref);
403 ret = key_link(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref));
405 key_ref_put(key_ref);
407 key_ref_put(keyring_ref);
411 } /* end keyctl_keyring_link() */
413 /*****************************************************************************/
415 * unlink the first attachment of a key from a keyring
416 * - the keyring must be writable
417 * - we don't need any permissions on the key
418 * - implements keyctl(KEYCTL_UNLINK)
420 long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid)
422 key_ref_t keyring_ref, key_ref;
425 keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE);
426 if (IS_ERR(keyring_ref)) {
427 ret = PTR_ERR(keyring_ref);
431 key_ref = lookup_user_key(NULL, id, 0, 0, 0);
432 if (IS_ERR(key_ref)) {
433 ret = PTR_ERR(key_ref);
437 ret = key_unlink(key_ref_to_ptr(keyring_ref), key_ref_to_ptr(key_ref));
439 key_ref_put(key_ref);
441 key_ref_put(keyring_ref);
445 } /* end keyctl_keyring_unlink() */
447 /*****************************************************************************/
449 * describe a user key
450 * - the key must have view permission
451 * - if there's a buffer, we place up to buflen bytes of data into it
452 * - unless there's an error, we return the amount of description available,
453 * irrespective of how much we may have copied
454 * - the description is formatted thus:
455 * type;uid;gid;perm;description<NUL>
456 * - implements keyctl(KEYCTL_DESCRIBE)
458 long keyctl_describe_key(key_serial_t keyid,
462 struct key *key, *instkey;
467 key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
468 if (IS_ERR(key_ref)) {
469 /* viewing a key under construction is permitted if we have the
470 * authorisation token handy */
471 if (PTR_ERR(key_ref) == -EACCES) {
472 instkey = key_get_instantiation_authkey(keyid);
473 if (!IS_ERR(instkey)) {
475 key_ref = lookup_user_key(NULL, keyid,
477 if (!IS_ERR(key_ref))
482 ret = PTR_ERR(key_ref);
487 /* calculate how much description we're going to return */
489 tmpbuf = kmalloc(PAGE_SIZE, GFP_KERNEL);
493 key = key_ref_to_ptr(key_ref);
495 ret = snprintf(tmpbuf, PAGE_SIZE - 1,
497 key_ref_to_ptr(key_ref)->type->name,
498 key_ref_to_ptr(key_ref)->uid,
499 key_ref_to_ptr(key_ref)->gid,
500 key_ref_to_ptr(key_ref)->perm,
501 key_ref_to_ptr(key_ref)->description ?
502 key_ref_to_ptr(key_ref)->description : ""
505 /* include a NUL char at the end of the data */
506 if (ret > PAGE_SIZE - 1)
511 /* consider returning the data */
512 if (buffer && buflen > 0) {
516 if (copy_to_user(buffer, tmpbuf, buflen) != 0)
522 key_ref_put(key_ref);
526 } /* end keyctl_describe_key() */
528 /*****************************************************************************/
530 * search the specified keyring for a matching key
531 * - the start keyring must be searchable
532 * - nested keyrings may also be searched if they are searchable
533 * - only keys with search permission may be found
534 * - if a key is found, it will be attached to the destination keyring if
535 * there's one specified
536 * - implements keyctl(KEYCTL_SEARCH)
538 long keyctl_keyring_search(key_serial_t ringid,
539 const char __user *_type,
540 const char __user *_description,
541 key_serial_t destringid)
543 struct key_type *ktype;
544 key_ref_t keyring_ref, key_ref, dest_ref;
545 char type[32], *description;
548 /* pull the type and description into kernel space */
549 ret = key_get_type_from_user(type, _type, sizeof(type));
553 description = strndup_user(_description, PAGE_SIZE);
554 if (IS_ERR(description)) {
555 ret = PTR_ERR(description);
559 /* get the keyring at which to begin the search */
560 keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH);
561 if (IS_ERR(keyring_ref)) {
562 ret = PTR_ERR(keyring_ref);
566 /* get the destination keyring if specified */
569 dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
570 if (IS_ERR(dest_ref)) {
571 ret = PTR_ERR(dest_ref);
576 /* find the key type */
577 ktype = key_type_lookup(type);
579 ret = PTR_ERR(ktype);
584 key_ref = keyring_search(keyring_ref, ktype, description);
585 if (IS_ERR(key_ref)) {
586 ret = PTR_ERR(key_ref);
588 /* treat lack or presence of a negative key the same */
594 /* link the resulting key to the destination keyring if we can */
596 ret = key_permission(key_ref, KEY_LINK);
600 ret = key_link(key_ref_to_ptr(dest_ref), key_ref_to_ptr(key_ref));
605 ret = key_ref_to_ptr(key_ref)->serial;
608 key_ref_put(key_ref);
612 key_ref_put(dest_ref);
614 key_ref_put(keyring_ref);
620 } /* end keyctl_keyring_search() */
622 /*****************************************************************************/
624 * read a user key's payload
625 * - the keyring must be readable or the key must be searchable from the
627 * - if there's a buffer, we place up to buflen bytes of data into it
628 * - unless there's an error, we return the amount of data in the key,
629 * irrespective of how much we may have copied
630 * - implements keyctl(KEYCTL_READ)
632 long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
638 /* find the key first */
639 key_ref = lookup_user_key(NULL, keyid, 0, 0, 0);
640 if (IS_ERR(key_ref)) {
645 key = key_ref_to_ptr(key_ref);
647 /* see if we can read it directly */
648 ret = key_permission(key_ref, KEY_READ);
654 /* we can't; see if it's searchable from this process's keyrings
655 * - we automatically take account of the fact that it may be
656 * dangling off an instantiation key
658 if (!is_key_possessed(key_ref)) {
663 /* the key is probably readable - now try to read it */
665 ret = key_validate(key);
668 if (key->type->read) {
669 /* read the data with the semaphore held (since we
671 down_read(&key->sem);
672 ret = key->type->read(key, buffer, buflen);
682 } /* end keyctl_read_key() */
684 /*****************************************************************************/
686 * change the ownership of a key
687 * - the keyring owned by the changer
688 * - if the uid or gid is -1, then that parameter is not changed
689 * - implements keyctl(KEYCTL_CHOWN)
691 long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
693 struct key_user *newowner, *zapowner = NULL;
699 if (uid == (uid_t) -1 && gid == (gid_t) -1)
702 key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
703 if (IS_ERR(key_ref)) {
704 ret = PTR_ERR(key_ref);
708 key = key_ref_to_ptr(key_ref);
710 /* make the changes with the locks held to prevent chown/chown races */
712 down_write(&key->sem);
714 if (!capable(CAP_SYS_ADMIN)) {
715 /* only the sysadmin can chown a key to some other UID */
716 if (uid != (uid_t) -1 && key->uid != uid)
719 /* only the sysadmin can set the key's GID to a group other
720 * than one of those that the current process subscribes to */
721 if (gid != (gid_t) -1 && gid != key->gid && !in_group_p(gid))
726 if (uid != (uid_t) -1 && uid != key->uid) {
728 newowner = key_user_lookup(uid);
732 /* transfer the quota burden to the new user */
733 if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) {
734 unsigned maxkeys = (uid == 0) ?
735 key_quota_root_maxkeys : key_quota_maxkeys;
736 unsigned maxbytes = (uid == 0) ?
737 key_quota_root_maxbytes : key_quota_maxbytes;
739 spin_lock(&newowner->lock);
740 if (newowner->qnkeys + 1 >= maxkeys ||
741 newowner->qnbytes + key->quotalen >= maxbytes ||
742 newowner->qnbytes + key->quotalen <
747 newowner->qnbytes += key->quotalen;
748 spin_unlock(&newowner->lock);
750 spin_lock(&key->user->lock);
752 key->user->qnbytes -= key->quotalen;
753 spin_unlock(&key->user->lock);
756 atomic_dec(&key->user->nkeys);
757 atomic_inc(&newowner->nkeys);
759 if (test_bit(KEY_FLAG_INSTANTIATED, &key->flags)) {
760 atomic_dec(&key->user->nikeys);
761 atomic_inc(&newowner->nikeys);
764 zapowner = key->user;
765 key->user = newowner;
770 if (gid != (gid_t) -1)
779 key_user_put(zapowner);
784 spin_unlock(&newowner->lock);
789 } /* end keyctl_chown_key() */
791 /*****************************************************************************/
793 * change the permission mask on a key
794 * - the keyring owned by the changer
795 * - implements keyctl(KEYCTL_SETPERM)
797 long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
804 if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL))
807 key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
808 if (IS_ERR(key_ref)) {
809 ret = PTR_ERR(key_ref);
813 key = key_ref_to_ptr(key_ref);
815 /* make the changes with the locks held to prevent chown/chmod races */
817 down_write(&key->sem);
819 /* if we're not the sysadmin, we can only change a key that we own */
820 if (capable(CAP_SYS_ADMIN) || key->uid == current->fsuid) {
830 } /* end keyctl_setperm_key() */
832 /*****************************************************************************/
834 * instantiate the key with the specified payload, and, if one is given, link
835 * the key into the keyring
837 long keyctl_instantiate_key(key_serial_t id,
838 const void __user *_payload,
842 struct request_key_auth *rka;
844 key_ref_t keyring_ref;
850 if (plen > 1024 * 1024 - 1)
853 /* the appropriate instantiation authorisation key must have been
854 * assumed before calling this */
856 instkey = current->request_key_auth;
860 rka = instkey->payload.data;
861 if (rka->target_key->serial != id)
864 /* pull the payload in if one was supplied */
869 payload = kmalloc(plen, GFP_KERNEL);
871 if (plen <= PAGE_SIZE)
874 payload = vmalloc(plen);
880 if (copy_from_user(payload, _payload, plen) != 0)
884 /* find the destination keyring amongst those belonging to the
888 keyring_ref = lookup_user_key(rka->context, ringid, 1, 0,
890 if (IS_ERR(keyring_ref)) {
891 ret = PTR_ERR(keyring_ref);
896 /* instantiate the key and link it into a keyring */
897 ret = key_instantiate_and_link(rka->target_key, payload, plen,
898 key_ref_to_ptr(keyring_ref), instkey);
900 key_ref_put(keyring_ref);
902 /* discard the assumed authority if it's just been disabled by
903 * instantiation of the key */
905 key_put(current->request_key_auth);
906 current->request_key_auth = NULL;
917 } /* end keyctl_instantiate_key() */
919 /*****************************************************************************/
921 * negatively instantiate the key with the given timeout (in seconds), and, if
922 * one is given, link the key into the keyring
924 long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
926 struct request_key_auth *rka;
928 key_ref_t keyring_ref;
931 /* the appropriate instantiation authorisation key must have been
932 * assumed before calling this */
934 instkey = current->request_key_auth;
938 rka = instkey->payload.data;
939 if (rka->target_key->serial != id)
942 /* find the destination keyring if present (which must also be
946 keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
947 if (IS_ERR(keyring_ref)) {
948 ret = PTR_ERR(keyring_ref);
953 /* instantiate the key and link it into a keyring */
954 ret = key_negate_and_link(rka->target_key, timeout,
955 key_ref_to_ptr(keyring_ref), instkey);
957 key_ref_put(keyring_ref);
959 /* discard the assumed authority if it's just been disabled by
960 * instantiation of the key */
962 key_put(current->request_key_auth);
963 current->request_key_auth = NULL;
969 } /* end keyctl_negate_key() */
971 /*****************************************************************************/
973 * set the default keyring in which request_key() will cache keys
974 * - return the old setting
976 long keyctl_set_reqkey_keyring(int reqkey_defl)
980 switch (reqkey_defl) {
981 case KEY_REQKEY_DEFL_THREAD_KEYRING:
982 ret = install_thread_keyring(current);
987 case KEY_REQKEY_DEFL_PROCESS_KEYRING:
988 ret = install_process_keyring(current);
992 case KEY_REQKEY_DEFL_DEFAULT:
993 case KEY_REQKEY_DEFL_SESSION_KEYRING:
994 case KEY_REQKEY_DEFL_USER_KEYRING:
995 case KEY_REQKEY_DEFL_USER_SESSION_KEYRING:
997 current->jit_keyring = reqkey_defl;
999 case KEY_REQKEY_DEFL_NO_CHANGE:
1000 return current->jit_keyring;
1002 case KEY_REQKEY_DEFL_GROUP_KEYRING:
1007 } /* end keyctl_set_reqkey_keyring() */
1009 /*****************************************************************************/
1011 * set or clear the timeout for a key
1013 long keyctl_set_timeout(key_serial_t id, unsigned timeout)
1015 struct timespec now;
1021 key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
1022 if (IS_ERR(key_ref)) {
1023 ret = PTR_ERR(key_ref);
1027 key = key_ref_to_ptr(key_ref);
1029 /* make the changes with the locks held to prevent races */
1030 down_write(&key->sem);
1034 now = current_kernel_time();
1035 expiry = now.tv_sec + timeout;
1038 key->expiry = expiry;
1040 up_write(&key->sem);
1047 } /* end keyctl_set_timeout() */
1049 /*****************************************************************************/
1051 * assume the authority to instantiate the specified key
1053 long keyctl_assume_authority(key_serial_t id)
1055 struct key *authkey;
1058 /* special key IDs aren't permitted */
1063 /* we divest ourselves of authority if given an ID of 0 */
1065 key_put(current->request_key_auth);
1066 current->request_key_auth = NULL;
1071 /* attempt to assume the authority temporarily granted to us whilst we
1072 * instantiate the specified key
1073 * - the authorisation key must be in the current task's keyrings
1076 authkey = key_get_instantiation_authkey(id);
1077 if (IS_ERR(authkey)) {
1078 ret = PTR_ERR(authkey);
1082 key_put(current->request_key_auth);
1083 current->request_key_auth = authkey;
1084 ret = authkey->serial;
1089 } /* end keyctl_assume_authority() */
1092 * get the security label of a key
1093 * - the key must grant us view permission
1094 * - if there's a buffer, we place up to buflen bytes of data into it
1095 * - unless there's an error, we return the amount of information available,
1096 * irrespective of how much we may have copied (including the terminal NUL)
1097 * - implements keyctl(KEYCTL_GET_SECURITY)
1099 long keyctl_get_security(key_serial_t keyid,
1100 char __user *buffer,
1103 struct key *key, *instkey;
1108 key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
1109 if (IS_ERR(key_ref)) {
1110 if (PTR_ERR(key_ref) != -EACCES)
1111 return PTR_ERR(key_ref);
1113 /* viewing a key under construction is also permitted if we
1114 * have the authorisation token handy */
1115 instkey = key_get_instantiation_authkey(keyid);
1116 if (IS_ERR(instkey))
1117 return PTR_ERR(key_ref);
1120 key_ref = lookup_user_key(NULL, keyid, 0, 1, 0);
1121 if (IS_ERR(key_ref))
1122 return PTR_ERR(key_ref);
1125 key = key_ref_to_ptr(key_ref);
1126 ret = security_key_getsecurity(key, &context);
1128 /* if no information was returned, give userspace an empty
1131 if (buffer && buflen > 0 &&
1132 copy_to_user(buffer, "", 1) != 0)
1134 } else if (ret > 0) {
1135 /* return as much data as there's room for */
1136 if (buffer && buflen > 0) {
1140 if (copy_to_user(buffer, context, buflen) != 0)
1147 key_ref_put(key_ref);
1151 /*****************************************************************************/
1153 * the key control system call
1155 asmlinkage long sys_keyctl(int option, unsigned long arg2, unsigned long arg3,
1156 unsigned long arg4, unsigned long arg5)
1159 case KEYCTL_GET_KEYRING_ID:
1160 return keyctl_get_keyring_ID((key_serial_t) arg2,
1163 case KEYCTL_JOIN_SESSION_KEYRING:
1164 return keyctl_join_session_keyring((const char __user *) arg2);
1167 return keyctl_update_key((key_serial_t) arg2,
1168 (const void __user *) arg3,
1172 return keyctl_revoke_key((key_serial_t) arg2);
1174 case KEYCTL_DESCRIBE:
1175 return keyctl_describe_key((key_serial_t) arg2,
1176 (char __user *) arg3,
1180 return keyctl_keyring_clear((key_serial_t) arg2);
1183 return keyctl_keyring_link((key_serial_t) arg2,
1184 (key_serial_t) arg3);
1187 return keyctl_keyring_unlink((key_serial_t) arg2,
1188 (key_serial_t) arg3);
1191 return keyctl_keyring_search((key_serial_t) arg2,
1192 (const char __user *) arg3,
1193 (const char __user *) arg4,
1194 (key_serial_t) arg5);
1197 return keyctl_read_key((key_serial_t) arg2,
1198 (char __user *) arg3,
1202 return keyctl_chown_key((key_serial_t) arg2,
1206 case KEYCTL_SETPERM:
1207 return keyctl_setperm_key((key_serial_t) arg2,
1210 case KEYCTL_INSTANTIATE:
1211 return keyctl_instantiate_key((key_serial_t) arg2,
1212 (const void __user *) arg3,
1214 (key_serial_t) arg5);
1217 return keyctl_negate_key((key_serial_t) arg2,
1219 (key_serial_t) arg4);
1221 case KEYCTL_SET_REQKEY_KEYRING:
1222 return keyctl_set_reqkey_keyring(arg2);
1224 case KEYCTL_SET_TIMEOUT:
1225 return keyctl_set_timeout((key_serial_t) arg2,
1228 case KEYCTL_ASSUME_AUTHORITY:
1229 return keyctl_assume_authority((key_serial_t) arg2);
1231 case KEYCTL_GET_SECURITY:
1232 return keyctl_get_security((key_serial_t) arg2,
1240 } /* end sys_keyctl() */