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
77static struct label *
78mac_sysv_msgmsg_label_alloc(void)
79{
80 struct label *label;
81
82 label = mac_labelzone_alloc(MAC_WAITOK);
83 if (label == NULL)
84 return (NULL);
85 MAC_PERFORM(sysvmsg_label_init, label);
86 return (label);
87}
88
89void
90mac_sysvmsg_label_init(struct msg *msgptr)
91{
92
93 msgptr->label = mac_sysv_msgmsg_label_alloc();
94}
95
96static struct label *
97mac_sysv_msgqueue_label_alloc(void)
98{
99 struct label *label;
100
101 label = mac_labelzone_alloc(MAC_WAITOK);
102 if (label == NULL)
103 return (NULL);
104 MAC_PERFORM(sysvmsq_label_init, label);
105 return (label);
106}
107
108void
109mac_sysvmsq_label_init(struct msqid_kernel *msqptr)
110{
111
112 msqptr->label = mac_sysv_msgqueue_label_alloc();
113}
114
115void
116mac_sysvmsg_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr,
117 struct msg *msgptr)
118{
119
120 MAC_PERFORM(sysvmsg_label_associate, cred, msqptr, msqptr->label,
121 msgptr, msgptr->label);
122}
123
124void
125mac_sysvmsq_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr)
126{
127
128 MAC_PERFORM(sysvmsq_label_associate, cred, msqptr, msqptr->label);
129}
130
131void
132mac_sysvmsg_label_recycle(struct msg *msgptr)
133{
134
135 MAC_PERFORM(sysvmsg_label_recycle, msgptr->label);
136}
137
138void
139mac_sysvmsq_label_recycle(struct msqid_kernel *msqptr)
140{
141
142 MAC_PERFORM(sysvmsq_label_recycle, msqptr->label);
143}
144
145int
146mac_sysvmsq_check_enqueue(kauth_cred_t cred, struct msg *msgptr,
147 struct msqid_kernel *msqptr)
148{
149 int error;
150
151#if SECURITY_MAC_CHECK_ENFORCE
152 /* 21167099 - only check if we allow write */
153 if (!mac_sysvmsg_enforce)
154 return (0);
155#endif
156
157 MAC_CHECK(sysvmsq_check_enqueue, cred, msgptr, msgptr->label, msqptr,
158 msqptr->label);
159
160 return(error);
161}
162
163int
164mac_sysvmsq_check_msgrcv(kauth_cred_t cred, struct msg *msgptr)
165{
166 int error;
167
168#if SECURITY_MAC_CHECK_ENFORCE
169 /* 21167099 - only check if we allow write */
170 if (!mac_sysvmsg_enforce)
171 return (0);
172#endif
173
174 MAC_CHECK(sysvmsq_check_msgrcv, cred, msgptr, msgptr->label);
175
176 return(error);
177}
178
179int
180mac_sysvmsq_check_msgrmid(kauth_cred_t cred, struct msg *msgptr)
181{
182 int error;
183
184#if SECURITY_MAC_CHECK_ENFORCE
185 /* 21167099 - only check if we allow write */
186 if (!mac_sysvmsg_enforce)
187 return (0);
188#endif
189
190 MAC_CHECK(sysvmsq_check_msgrmid, cred, msgptr, msgptr->label);
191
192 return(error);
193}
194
195int
196mac_sysvmsq_check_msqget(kauth_cred_t cred, struct msqid_kernel *msqptr)
197{
198 int error;
199
200#if SECURITY_MAC_CHECK_ENFORCE
201 /* 21167099 - only check if we allow write */
202 if (!mac_sysvmsg_enforce)
203 return (0);
204#endif
205
206 MAC_CHECK(sysvmsq_check_msqget, cred, msqptr, msqptr->label);
207
208 return(error);
209}
210
211int
212mac_sysvmsq_check_msqsnd(kauth_cred_t cred, struct msqid_kernel *msqptr)
213{
214 int error;
215
216#if SECURITY_MAC_CHECK_ENFORCE
217 /* 21167099 - only check if we allow write */
218 if (!mac_sysvmsg_enforce)
219 return (0);
220#endif
221
222 MAC_CHECK(sysvmsq_check_msqsnd, cred, msqptr, msqptr->label);
223
224 return(error);
225}
226
227int
228mac_sysvmsq_check_msqrcv(kauth_cred_t cred, struct msqid_kernel *msqptr)
229{
230 int error;
231
232#if SECURITY_MAC_CHECK_ENFORCE
233 /* 21167099 - only check if we allow write */
234 if (!mac_sysvmsg_enforce)
235 return (0);
236#endif
237
238 MAC_CHECK(sysvmsq_check_msqrcv, cred, msqptr, msqptr->label);
239
240 return(error);
241}
242
243int
244mac_sysvmsq_check_msqctl(kauth_cred_t cred, struct msqid_kernel *msqptr,
245 int cmd)
246{
247 int error;
248
249#if SECURITY_MAC_CHECK_ENFORCE
250 /* 21167099 - only check if we allow write */
251 if (!mac_sysvmsg_enforce)
252 return (0);
253#endif
254
255 MAC_CHECK(sysvmsq_check_msqctl, cred, msqptr, msqptr->label, cmd);
256
257 return(error);
258}
259