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 |
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 |
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(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 | |
129 | int |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 | |