1 /*
2 * Copyright (c) 2007-2012 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) 1999-2002 Robert N. M. Watson
30 * Copyright (c) 2001 Ilmar S. Habibulin
31 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
32 * Copyright (c) 2005 SPARTA, Inc.
33 * All rights reserved.
34 *
35 * This software was developed by Robert Watson and Ilmar Habibulin for the
36 * TrustedBSD Project.
37 *
38 * This software was developed for the FreeBSD Project in part by McAfee
39 * Research, the Technology Research Division of Network Associates, Inc.
40 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
41 * DARPA CHATS research program.
42 *
43 * This software was enhanced by SPARTA ISSO under SPAWAR contract
44 * N66001-04-C-6019 ("SEFOS").
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 */
67
68 #include <sys/cdefs.h>
69
70 #include <sys/param.h>
71 #include <sys/kernel.h>
72 #include <sys/lock.h>
73 #include <sys/malloc.h>
74 #include <sys/sbuf.h>
75 #include <sys/systm.h>
76 #include <sys/mount.h>
77 #include <sys/file.h>
78 #include <sys/namei.h>
79 #include <sys/protosw.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/sysctl.h>
83 #include <sys/kpi_socket.h>
84
85 #include <security/mac_internal.h>
86
87 int
mac_socket_check_accept(kauth_cred_t cred,struct socket * so)88 mac_socket_check_accept(kauth_cred_t cred, struct socket *so)
89 {
90 int error;
91
92 #if SECURITY_MAC_CHECK_ENFORCE
93 /* 21167099 - only check if we allow write */
94 if (!mac_socket_enforce) {
95 return 0;
96 }
97 #endif
98
99 MAC_CHECK(socket_check_accept, cred,
100 (socket_t)so, NULL);
101 return error;
102 }
103
104 #if CONFIG_MACF_SOCKET_SUBSET
105 int
mac_socket_check_accepted(kauth_cred_t cred,struct socket * so)106 mac_socket_check_accepted(kauth_cred_t cred, struct socket *so)
107 {
108 struct sockaddr *sockaddr;
109 int error;
110
111 #if SECURITY_MAC_CHECK_ENFORCE
112 /* 21167099 - only check if we allow write */
113 if (!mac_socket_enforce) {
114 return 0;
115 }
116 #endif
117
118 if (sock_getaddr((socket_t)so, &sockaddr, 1) != 0) {
119 error = ECONNABORTED;
120 } else {
121 MAC_CHECK(socket_check_accepted, cred,
122 (socket_t)so, NULL, sockaddr);
123 sock_freeaddr(sockaddr);
124 }
125 return error;
126 }
127 #endif
128
129 int
mac_socket_check_bind(kauth_cred_t ucred,struct socket * so,struct sockaddr * sockaddr)130 mac_socket_check_bind(kauth_cred_t ucred, struct socket *so,
131 struct sockaddr *sockaddr)
132 {
133 int error;
134
135 #if SECURITY_MAC_CHECK_ENFORCE
136 /* 21167099 - only check if we allow write */
137 if (!mac_socket_enforce) {
138 return 0;
139 }
140 #endif
141
142 MAC_CHECK(socket_check_bind, ucred,
143 (socket_t)so, NULL, sockaddr);
144 return error;
145 }
146
147 int
mac_socket_check_connect(kauth_cred_t cred,struct socket * so,struct sockaddr * sockaddr)148 mac_socket_check_connect(kauth_cred_t cred, struct socket *so,
149 struct sockaddr *sockaddr)
150 {
151 int error;
152
153 #if SECURITY_MAC_CHECK_ENFORCE
154 /* 21167099 - only check if we allow write */
155 if (!mac_socket_enforce) {
156 return 0;
157 }
158 #endif
159
160 MAC_CHECK(socket_check_connect, cred,
161 (socket_t)so, NULL,
162 sockaddr);
163 return error;
164 }
165
166 int
mac_socket_check_create(kauth_cred_t cred,int domain,int type,int protocol)167 mac_socket_check_create(kauth_cred_t cred, int domain, int type, int protocol)
168 {
169 int error;
170
171 #if SECURITY_MAC_CHECK_ENFORCE
172 /* 21167099 - only check if we allow write */
173 if (!mac_socket_enforce) {
174 return 0;
175 }
176 #endif
177
178 MAC_CHECK(socket_check_create, cred, domain, type, protocol);
179 return error;
180 }
181
182 int
mac_socket_check_ioctl(kauth_cred_t cred,struct socket * so,u_long cmd)183 mac_socket_check_ioctl(kauth_cred_t cred, struct socket *so, u_long cmd)
184 {
185 int error;
186
187 #if SECURITY_MAC_CHECK_ENFORCE
188 /* 21167099 - only check if we allow write */
189 if (!mac_socket_enforce) {
190 return 0;
191 }
192 #endif
193
194 MAC_CHECK(socket_check_ioctl, cred,
195 (socket_t)so, cmd, NULL);
196 return error;
197 }
198
199 int
mac_socket_check_stat(kauth_cred_t cred,struct socket * so)200 mac_socket_check_stat(kauth_cred_t cred, struct socket *so)
201 {
202 int error;
203
204 #if SECURITY_MAC_CHECK_ENFORCE
205 /* 21167099 - only check if we allow write */
206 if (!mac_socket_enforce) {
207 return 0;
208 }
209 #endif
210
211 MAC_CHECK(socket_check_stat, cred,
212 (socket_t)so, NULL);
213 return error;
214 }
215
216 int
mac_socket_check_listen(kauth_cred_t cred,struct socket * so)217 mac_socket_check_listen(kauth_cred_t cred, struct socket *so)
218 {
219 int error;
220
221 #if SECURITY_MAC_CHECK_ENFORCE
222 /* 21167099 - only check if we allow write */
223 if (!mac_socket_enforce) {
224 return 0;
225 }
226 #endif
227
228 MAC_CHECK(socket_check_listen, cred,
229 (socket_t)so, NULL);
230 return error;
231 }
232
233 int
mac_socket_check_receive(kauth_cred_t cred,struct socket * so)234 mac_socket_check_receive(kauth_cred_t cred, struct socket *so)
235 {
236 int error;
237
238 #if SECURITY_MAC_CHECK_ENFORCE
239 /* 21167099 - only check if we allow write */
240 if (!mac_socket_enforce) {
241 return 0;
242 }
243 #endif
244
245 MAC_CHECK(socket_check_receive, cred,
246 (socket_t)so, NULL);
247 return error;
248 }
249
250 int
mac_socket_check_received(kauth_cred_t cred,struct socket * so,struct sockaddr * saddr)251 mac_socket_check_received(kauth_cred_t cred, struct socket *so, struct sockaddr *saddr)
252 {
253 int error;
254
255 #if SECURITY_MAC_CHECK_ENFORCE
256 /* 21167099 - only check if we allow write */
257 if (!mac_socket_enforce) {
258 return 0;
259 }
260 #endif
261
262 MAC_CHECK(socket_check_received, cred,
263 so, NULL, saddr);
264 return error;
265 }
266
267 int
mac_socket_check_send(kauth_cred_t cred,struct socket * so,struct sockaddr * sockaddr)268 mac_socket_check_send(kauth_cred_t cred, struct socket *so,
269 struct sockaddr *sockaddr)
270 {
271 int error;
272
273 #if SECURITY_MAC_CHECK_ENFORCE
274 /* 21167099 - only check if we allow write */
275 if (!mac_socket_enforce) {
276 return 0;
277 }
278 #endif
279
280 MAC_CHECK(socket_check_send, cred,
281 (socket_t)so, NULL, sockaddr);
282 return error;
283 }
284
285 int
mac_socket_check_setsockopt(kauth_cred_t cred,struct socket * so,struct sockopt * sopt)286 mac_socket_check_setsockopt(kauth_cred_t cred, struct socket *so,
287 struct sockopt *sopt)
288 {
289 int error;
290
291 #if SECURITY_MAC_CHECK_ENFORCE
292 /* 21167099 - only check if we allow write */
293 if (!mac_socket_enforce) {
294 return 0;
295 }
296 #endif
297
298 MAC_CHECK(socket_check_setsockopt, cred,
299 (socket_t)so, NULL, sopt);
300 return error;
301 }
302
303 int
mac_socket_check_getsockopt(kauth_cred_t cred,struct socket * so,struct sockopt * sopt)304 mac_socket_check_getsockopt(kauth_cred_t cred, struct socket *so,
305 struct sockopt *sopt)
306 {
307 int error;
308
309 #if SECURITY_MAC_CHECK_ENFORCE
310 /* 21167099 - only check if we allow write */
311 if (!mac_socket_enforce) {
312 return 0;
313 }
314 #endif
315
316 MAC_CHECK(socket_check_getsockopt, cred,
317 (socket_t)so, NULL, sopt);
318 return error;
319 }
320