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
87int
88mac_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
105int
106mac_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(so: (socket_t)so, psockname: &sockaddr, peername: 1) != 0) {
119 error = ECONNABORTED;
120 } else {
121 MAC_CHECK(socket_check_accepted, cred,
122 (socket_t)so, NULL, sockaddr);
123 sock_freeaddr(sockname: sockaddr);
124 }
125 return error;
126}
127#endif
128
129int
130mac_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
147int
148mac_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
166int
167mac_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
182int
183mac_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
199int
200mac_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
216int
217mac_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
233int
234mac_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
250int
251mac_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
267int
268mac_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
285int
286mac_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
303int
304mac_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