1 /*
2 * Copyright (c) 2021 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 #include <sys/param.h>
30 #include <sys/proc.h>
31 #include <sys/kauth.h>
32 #include <security/mac_framework.h>
33 #include <security/mac_internal.h>
34
35 int
mac_necp_check_open(proc_t proc,int flags)36 mac_necp_check_open(proc_t proc, int flags)
37 {
38 kauth_cred_t cred;
39 int error;
40
41 #if SECURITY_MAC_CHECK_ENFORCE
42 /* 21167099 - only check if we allow write */
43 if (!mac_proc_enforce) {
44 return 0;
45 }
46 #endif
47
48 if (!mac_proc_check_enforce(proc)) {
49 return 0;
50 }
51
52 cred = kauth_cred_proc_ref(proc);
53 MAC_CHECK(necp_check_open, cred, flags);
54 kauth_cred_unref(&cred);
55
56 return error;
57 }
58
59 int
mac_necp_check_client_action(proc_t proc,struct fileglob * fg,uint32_t action)60 mac_necp_check_client_action(proc_t proc, struct fileglob *fg, uint32_t action)
61 {
62 kauth_cred_t cred;
63 int error;
64
65 #if SECURITY_MAC_CHECK_ENFORCE
66 /* 21167099 - only check if we allow write */
67 if (!mac_proc_enforce) {
68 return 0;
69 }
70 #endif
71
72 if (!mac_proc_check_enforce(proc)) {
73 return 0;
74 }
75
76 cred = kauth_cred_proc_ref(proc);
77 MAC_CHECK(necp_check_client_action, cred, fg, action);
78 kauth_cred_unref(&cred);
79
80 return error;
81 }
82