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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
77 static struct label *
78 mac_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
89 void
90 mac_sysvmsg_label_init(struct msg *msgptr)
91 {
92
93 msgptr->label = mac_sysv_msgmsg_label_alloc();
94 }
95
96 static struct label *
97 mac_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
108 void
109 mac_sysvmsq_label_init(struct msqid_kernel *msqptr)
110 {
111
112 msqptr->label = mac_sysv_msgqueue_label_alloc();
113 }
114
115 void
116 mac_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
124 void
125 mac_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
131 void
132 mac_sysvmsg_label_recycle(struct msg *msgptr)
133 {
134
135 MAC_PERFORM(sysvmsg_label_recycle, msgptr->label);
136 }
137
138 void
139 mac_sysvmsq_label_recycle(struct msqid_kernel *msqptr)
140 {
141
142 MAC_PERFORM(sysvmsq_label_recycle, msqptr->label);
143 }
144
145 int
146 mac_sysvmsq_check_enqueue(kauth_cred_t cred, struct msg *msgptr,
147 struct msqid_kernel *msqptr)
148 {
149 int error;
150
151 if (!mac_sysvmsg_enforce)
152 return (0);
153
154 MAC_CHECK(sysvmsq_check_enqueue, cred, msgptr, msgptr->label, msqptr,
155 msqptr->label);
156
157 return(error);
158 }
159
160 int
161 mac_sysvmsq_check_msgrcv(kauth_cred_t cred, struct msg *msgptr)
162 {
163 int error;
164
165 if (!mac_sysvmsg_enforce)
166 return (0);
167
168 MAC_CHECK(sysvmsq_check_msgrcv, cred, msgptr, msgptr->label);
169
170 return(error);
171 }
172
173 int
174 mac_sysvmsq_check_msgrmid(kauth_cred_t cred, struct msg *msgptr)
175 {
176 int error;
177
178 if (!mac_sysvmsg_enforce)
179 return (0);
180
181 MAC_CHECK(sysvmsq_check_msgrmid, cred, msgptr, msgptr->label);
182
183 return(error);
184 }
185
186 int
187 mac_sysvmsq_check_msqget(kauth_cred_t cred, struct msqid_kernel *msqptr)
188 {
189 int error;
190
191 if (!mac_sysvmsg_enforce)
192 return (0);
193
194 MAC_CHECK(sysvmsq_check_msqget, cred, msqptr, msqptr->label);
195
196 return(error);
197 }
198
199 int
200 mac_sysvmsq_check_msqsnd(kauth_cred_t cred, struct msqid_kernel *msqptr)
201 {
202 int error;
203
204 if (!mac_sysvmsg_enforce)
205 return (0);
206
207 MAC_CHECK(sysvmsq_check_msqsnd, cred, msqptr, msqptr->label);
208
209 return(error);
210 }
211
212 int
213 mac_sysvmsq_check_msqrcv(kauth_cred_t cred, struct msqid_kernel *msqptr)
214 {
215 int error;
216
217 if (!mac_sysvmsg_enforce)
218 return (0);
219
220 MAC_CHECK(sysvmsq_check_msqrcv, cred, msqptr, msqptr->label);
221
222 return(error);
223 }
224
225 int
226 mac_sysvmsq_check_msqctl(kauth_cred_t cred, struct msqid_kernel *msqptr,
227 int cmd)
228 {
229 int error;
230
231 if (!mac_sysvmsg_enforce)
232 return (0);
233
234 MAC_CHECK(sysvmsq_check_msqctl, cred, msqptr, msqptr->label, cmd);
235
236 return(error);
237 }