1/*
2 * Copyright (c) 2007 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 * Copyright (c) 2003-2005 Networks Associates Technology, Inc.
30 * All rights reserved.
31 *
32 * This software was developed for the FreeBSD Project in part by Network
33 * Associates Laboratories, the Security Research Division of Network
34 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
35 * as part of the DARPA CHATS research program.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 */
58
59#include <sys/cdefs.h>
60
61#include <sys/param.h>
62#include <sys/systm.h>
63#include <sys/kernel.h>
64#include <sys/lock.h>
65#include <sys/malloc.h>
66#include <sys/sbuf.h>
67#include <sys/systm.h>
68#include <sys/vnode.h>
69#include <sys/mount.h>
70#include <sys/file.h>
71#include <sys/namei.h>
72#include <sys/sysctl.h>
73#include <sys/msg.h>
74
75#include <security/mac_internal.h>
76
77void
78mac_sysvmsg_label_init(struct msg *msgptr)
79{
80 mac_labelzone_alloc_owned(labelp: &msgptr->label, MAC_WAITOK, extra_setup: ^(struct label *label) {
81 MAC_PERFORM(sysvmsg_label_init, label);
82 });
83}
84
85struct label *
86mac_sysvmsg_label(struct msg *msgptr)
87{
88 return mac_label_verify(labelp: &msgptr->label);
89}
90
91void
92mac_sysvmsq_label_init(struct msqid_kernel *msqptr)
93{
94 mac_labelzone_alloc_owned(labelp: &msqptr->label, MAC_WAITOK, extra_setup: ^(struct label *label) {
95 MAC_PERFORM(sysvmsq_label_init, label);
96 });
97}
98
99struct label *
100mac_sysvmsq_label(struct msqid_kernel *msqptr)
101{
102 return mac_label_verify(labelp: &msqptr->label);
103}
104
105void
106mac_sysvmsg_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr,
107 struct msg *msgptr)
108{
109 MAC_PERFORM(sysvmsg_label_associate, cred, msqptr, mac_sysvmsq_label(msqptr),
110 msgptr, mac_sysvmsg_label(msgptr));
111}
112
113void
114mac_sysvmsq_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr)
115{
116 MAC_PERFORM(sysvmsq_label_associate, cred, msqptr, mac_sysvmsq_label(msqptr));
117}
118
119void
120mac_sysvmsg_label_recycle(struct msg *msgptr)
121{
122 MAC_PERFORM(sysvmsg_label_recycle, mac_sysvmsg_label(msgptr));
123}
124
125void
126mac_sysvmsq_label_recycle(struct msqid_kernel *msqptr)
127{
128 MAC_PERFORM(sysvmsq_label_recycle, mac_sysvmsq_label(msqptr));
129}
130
131int
132mac_sysvmsq_check_enqueue(kauth_cred_t cred, struct msg *msgptr,
133 struct msqid_kernel *msqptr)
134{
135 int error;
136
137#if SECURITY_MAC_CHECK_ENFORCE
138 /* 21167099 - only check if we allow write */
139 if (!mac_sysvmsg_enforce) {
140 return 0;
141 }
142#endif
143
144 MAC_CHECK(sysvmsq_check_enqueue, cred, msgptr, mac_sysvmsg_label(msgptr), msqptr,
145 mac_sysvmsq_label(msqptr));
146
147 return error;
148}
149
150int
151mac_sysvmsq_check_msgrcv(kauth_cred_t cred, struct msg *msgptr)
152{
153 int error;
154
155#if SECURITY_MAC_CHECK_ENFORCE
156 /* 21167099 - only check if we allow write */
157 if (!mac_sysvmsg_enforce) {
158 return 0;
159 }
160#endif
161
162 MAC_CHECK(sysvmsq_check_msgrcv, cred, msgptr, mac_sysvmsg_label(msgptr));
163
164 return error;
165}
166
167int
168mac_sysvmsq_check_msgrmid(kauth_cred_t cred, struct msg *msgptr)
169{
170 int error;
171
172#if SECURITY_MAC_CHECK_ENFORCE
173 /* 21167099 - only check if we allow write */
174 if (!mac_sysvmsg_enforce) {
175 return 0;
176 }
177#endif
178
179 MAC_CHECK(sysvmsq_check_msgrmid, cred, msgptr, mac_sysvmsg_label(msgptr));
180
181 return error;
182}
183
184int
185mac_sysvmsq_check_msqget(kauth_cred_t cred, struct msqid_kernel *msqptr)
186{
187 int error;
188
189#if SECURITY_MAC_CHECK_ENFORCE
190 /* 21167099 - only check if we allow write */
191 if (!mac_sysvmsg_enforce) {
192 return 0;
193 }
194#endif
195
196 MAC_CHECK(sysvmsq_check_msqget, cred, msqptr, mac_sysvmsq_label(msqptr));
197
198 return error;
199}
200
201int
202mac_sysvmsq_check_msqsnd(kauth_cred_t cred, struct msqid_kernel *msqptr)
203{
204 int error;
205
206#if SECURITY_MAC_CHECK_ENFORCE
207 /* 21167099 - only check if we allow write */
208 if (!mac_sysvmsg_enforce) {
209 return 0;
210 }
211#endif
212
213 MAC_CHECK(sysvmsq_check_msqsnd, cred, msqptr, mac_sysvmsq_label(msqptr));
214
215 return error;
216}
217
218int
219mac_sysvmsq_check_msqrcv(kauth_cred_t cred, struct msqid_kernel *msqptr)
220{
221 int error;
222
223#if SECURITY_MAC_CHECK_ENFORCE
224 /* 21167099 - only check if we allow write */
225 if (!mac_sysvmsg_enforce) {
226 return 0;
227 }
228#endif
229
230 MAC_CHECK(sysvmsq_check_msqrcv, cred, msqptr, mac_sysvmsq_label(msqptr));
231
232 return error;
233}
234
235int
236mac_sysvmsq_check_msqctl(kauth_cred_t cred, struct msqid_kernel *msqptr,
237 int cmd)
238{
239 int error;
240
241#if SECURITY_MAC_CHECK_ENFORCE
242 /* 21167099 - only check if we allow write */
243 if (!mac_sysvmsg_enforce) {
244 return 0;
245 }
246#endif
247
248 MAC_CHECK(sysvmsq_check_msqctl, cred, msqptr, mac_sysvmsq_label(msqptr), cmd);
249
250 return error;
251}
252