1*1b191cb5SApple OSS Distributions /*
2*1b191cb5SApple OSS Distributions * Copyright (c) 2021 Apple Inc. All rights reserved.
3*1b191cb5SApple OSS Distributions *
4*1b191cb5SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*1b191cb5SApple OSS Distributions *
6*1b191cb5SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*1b191cb5SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*1b191cb5SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*1b191cb5SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*1b191cb5SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*1b191cb5SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*1b191cb5SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*1b191cb5SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*1b191cb5SApple OSS Distributions *
15*1b191cb5SApple OSS Distributions * Please obtain a copy of the License at
16*1b191cb5SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*1b191cb5SApple OSS Distributions *
18*1b191cb5SApple OSS Distributions * The Original Code and all software distributed under the License are
19*1b191cb5SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*1b191cb5SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*1b191cb5SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*1b191cb5SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*1b191cb5SApple OSS Distributions * Please see the License for the specific language governing rights and
24*1b191cb5SApple OSS Distributions * limitations under the License.
25*1b191cb5SApple OSS Distributions *
26*1b191cb5SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*1b191cb5SApple OSS Distributions */
28*1b191cb5SApple OSS Distributions
29*1b191cb5SApple OSS Distributions #include <sys/param.h>
30*1b191cb5SApple OSS Distributions #include <sys/proc.h>
31*1b191cb5SApple OSS Distributions #include <sys/kauth.h>
32*1b191cb5SApple OSS Distributions #include <security/mac_framework.h>
33*1b191cb5SApple OSS Distributions #include <security/mac_internal.h>
34*1b191cb5SApple OSS Distributions
35*1b191cb5SApple OSS Distributions int
mac_necp_check_open(proc_t proc,int flags)36*1b191cb5SApple OSS Distributions mac_necp_check_open(proc_t proc, int flags)
37*1b191cb5SApple OSS Distributions {
38*1b191cb5SApple OSS Distributions kauth_cred_t cred;
39*1b191cb5SApple OSS Distributions int error;
40*1b191cb5SApple OSS Distributions
41*1b191cb5SApple OSS Distributions #if SECURITY_MAC_CHECK_ENFORCE
42*1b191cb5SApple OSS Distributions /* 21167099 - only check if we allow write */
43*1b191cb5SApple OSS Distributions if (!mac_proc_enforce) {
44*1b191cb5SApple OSS Distributions return 0;
45*1b191cb5SApple OSS Distributions }
46*1b191cb5SApple OSS Distributions #endif
47*1b191cb5SApple OSS Distributions
48*1b191cb5SApple OSS Distributions if (!mac_proc_check_enforce(proc)) {
49*1b191cb5SApple OSS Distributions return 0;
50*1b191cb5SApple OSS Distributions }
51*1b191cb5SApple OSS Distributions
52*1b191cb5SApple OSS Distributions cred = kauth_cred_proc_ref(proc);
53*1b191cb5SApple OSS Distributions MAC_CHECK(necp_check_open, cred, flags);
54*1b191cb5SApple OSS Distributions kauth_cred_unref(&cred);
55*1b191cb5SApple OSS Distributions
56*1b191cb5SApple OSS Distributions return error;
57*1b191cb5SApple OSS Distributions }
58*1b191cb5SApple OSS Distributions
59*1b191cb5SApple OSS Distributions int
mac_necp_check_client_action(proc_t proc,struct fileglob * fg,uint32_t action)60*1b191cb5SApple OSS Distributions mac_necp_check_client_action(proc_t proc, struct fileglob *fg, uint32_t action)
61*1b191cb5SApple OSS Distributions {
62*1b191cb5SApple OSS Distributions kauth_cred_t cred;
63*1b191cb5SApple OSS Distributions int error;
64*1b191cb5SApple OSS Distributions
65*1b191cb5SApple OSS Distributions #if SECURITY_MAC_CHECK_ENFORCE
66*1b191cb5SApple OSS Distributions /* 21167099 - only check if we allow write */
67*1b191cb5SApple OSS Distributions if (!mac_proc_enforce) {
68*1b191cb5SApple OSS Distributions return 0;
69*1b191cb5SApple OSS Distributions }
70*1b191cb5SApple OSS Distributions #endif
71*1b191cb5SApple OSS Distributions
72*1b191cb5SApple OSS Distributions if (!mac_proc_check_enforce(proc)) {
73*1b191cb5SApple OSS Distributions return 0;
74*1b191cb5SApple OSS Distributions }
75*1b191cb5SApple OSS Distributions
76*1b191cb5SApple OSS Distributions cred = kauth_cred_proc_ref(proc);
77*1b191cb5SApple OSS Distributions MAC_CHECK(necp_check_client_action, cred, fg, action);
78*1b191cb5SApple OSS Distributions kauth_cred_unref(&cred);
79*1b191cb5SApple OSS Distributions
80*1b191cb5SApple OSS Distributions return error;
81*1b191cb5SApple OSS Distributions }
82