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 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 | |
163 | int |
164 | mac_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 | |
179 | int |
180 | mac_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 | |
195 | int |
196 | mac_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 | |
211 | int |
212 | mac_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 | |
227 | int |
228 | mac_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 | |
243 | int |
244 | mac_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 | |