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 | void |
78 | mac_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 | |
85 | struct label * |
86 | mac_sysvmsg_label(struct msg *msgptr) |
87 | { |
88 | return mac_label_verify(labelp: &msgptr->label); |
89 | } |
90 | |
91 | void |
92 | mac_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 | |
99 | struct label * |
100 | mac_sysvmsq_label(struct msqid_kernel *msqptr) |
101 | { |
102 | return mac_label_verify(labelp: &msqptr->label); |
103 | } |
104 | |
105 | void |
106 | mac_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 | |
113 | void |
114 | mac_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 | |
119 | void |
120 | mac_sysvmsg_label_recycle(struct msg *msgptr) |
121 | { |
122 | MAC_PERFORM(sysvmsg_label_recycle, mac_sysvmsg_label(msgptr)); |
123 | } |
124 | |
125 | void |
126 | mac_sysvmsq_label_recycle(struct msqid_kernel *msqptr) |
127 | { |
128 | MAC_PERFORM(sysvmsq_label_recycle, mac_sysvmsq_label(msqptr)); |
129 | } |
130 | |
131 | int |
132 | mac_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 | |
150 | int |
151 | mac_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 | |
167 | int |
168 | mac_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 | |
184 | int |
185 | mac_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 | |
201 | int |
202 | mac_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 | |
218 | int |
219 | mac_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 | |
235 | int |
236 | mac_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 | |