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. 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 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 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 56 long keyctl_revoke(key_serial_t id) { 57 return keyctl(KEYCTL_REVOKE, id); 58 } 59 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 65 long keyctl_setperm(key_serial_t id, int permissions) { 66 return keyctl(KEYCTL_SETPERM, id, permissions); 67 } 68 69 long keyctl_unlink(key_serial_t key, key_serial_t keyring) { 70 return keyctl(KEYCTL_UNLINK, key, keyring); 71 } 72
