1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <keyutils.h>
30
31 #include <stdarg.h>
32 #include <sys/syscall.h>
33 #include <unistd.h>
34
35 // Deliberately not exposed. Callers should use the typed APIs instead.
keyctl(int cmd,...)36 static long keyctl(int cmd, ...) {
37 va_list va;
38 va_start(va, cmd);
39 unsigned long arg2 = va_arg(va, unsigned long);
40 unsigned long arg3 = va_arg(va, unsigned long);
41 unsigned long arg4 = va_arg(va, unsigned long);
42 unsigned long arg5 = va_arg(va, unsigned long);
43 va_end(va);
44 return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5);
45 }
46
add_key(const char * type,const char * description,const void * payload,size_t payload_length,key_serial_t ring_id)47 key_serial_t add_key(const char* type, const char* description, const void* payload,
48 size_t payload_length, key_serial_t ring_id) {
49 return syscall(__NR_add_key, type, description, payload, payload_length, ring_id);
50 }
51
keyctl_get_keyring_ID(key_serial_t id,int create)52 key_serial_t keyctl_get_keyring_ID(key_serial_t id, int create) {
53 return keyctl(KEYCTL_GET_KEYRING_ID, id, create);
54 }
55
keyctl_revoke(key_serial_t id)56 long keyctl_revoke(key_serial_t id) {
57 return keyctl(KEYCTL_REVOKE, id);
58 }
59
keyctl_search(key_serial_t ring_id,const char * type,const char * description,key_serial_t dest_ring_id)60 long keyctl_search(key_serial_t ring_id, const char* type, const char* description,
61 key_serial_t dest_ring_id) {
62 return keyctl(KEYCTL_SEARCH, ring_id, type, description, dest_ring_id);
63 }
64
keyctl_setperm(key_serial_t id,int permissions)65 long keyctl_setperm(key_serial_t id, int permissions) {
66 return keyctl(KEYCTL_SETPERM, id, permissions);
67 }
68
keyctl_unlink(key_serial_t key,key_serial_t keyring)69 long keyctl_unlink(key_serial_t key, key_serial_t keyring) {
70 return keyctl(KEYCTL_UNLINK, key, keyring);
71 }
72