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) 2002, 2003 Networks Associates Technology, Inc. |
30 | * Copyright (c) 2005 SPARTA, Inc. |
31 | * All rights reserved. |
32 | * |
33 | * This software was developed for the FreeBSD Project in part by Network |
34 | * Associates Laboratories, the Security Research Division of Network |
35 | * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), |
36 | * as part of the DARPA CHATS research program. |
37 | * |
38 | * Redistribution and use in source and binary forms, with or without |
39 | * modification, are permitted provided that the following conditions |
40 | * are met: |
41 | * 1. Redistributions of source code must retain the above copyright |
42 | * notice, this list of conditions and the following disclaimer. |
43 | * 2. Redistributions in binary form must reproduce the above copyright |
44 | * notice, this list of conditions and the following disclaimer in the |
45 | * documentation and/or other materials provided with the distribution. |
46 | * |
47 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
48 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
49 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
50 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
51 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
52 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
53 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
54 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
55 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
56 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
57 | * SUCH DAMAGE. |
58 | */ |
59 | |
60 | #include <sys/cdefs.h> |
61 | |
62 | #include <sys/param.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/pipe.h> |
70 | #include <sys/sysctl.h> |
71 | |
72 | #include <security/mac_internal.h> |
73 | |
74 | |
75 | struct label * |
76 | mac_pipe_label_alloc(void) |
77 | { |
78 | struct label *label; |
79 | |
80 | label = mac_labelzone_alloc(MAC_WAITOK); |
81 | if (label == NULL) |
82 | return (NULL); |
83 | MAC_PERFORM(pipe_label_init, label); |
84 | return (label); |
85 | } |
86 | |
87 | void |
88 | mac_pipe_label_init(struct pipe *cpipe) |
89 | { |
90 | |
91 | cpipe->pipe_label = mac_pipe_label_alloc(); |
92 | } |
93 | |
94 | void |
95 | mac_pipe_label_free(struct label *label) |
96 | { |
97 | |
98 | MAC_PERFORM(pipe_label_destroy, label); |
99 | mac_labelzone_free(label); |
100 | } |
101 | |
102 | void |
103 | mac_pipe_label_destroy(struct pipe *cpipe) |
104 | { |
105 | |
106 | mac_pipe_label_free(cpipe->pipe_label); |
107 | cpipe->pipe_label = NULL; |
108 | } |
109 | |
110 | void |
111 | mac_pipe_label_copy(struct label *src, struct label *dest) |
112 | { |
113 | |
114 | MAC_PERFORM(pipe_label_copy, src, dest); |
115 | } |
116 | |
117 | int |
118 | mac_pipe_label_externalize(struct label *label, char *elements, |
119 | char *outbuf, size_t outbuflen) |
120 | { |
121 | int error; |
122 | |
123 | error = MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen); |
124 | |
125 | return (error); |
126 | } |
127 | |
128 | int |
129 | mac_pipe_label_internalize(struct label *label, char *string) |
130 | { |
131 | int error; |
132 | |
133 | error = MAC_INTERNALIZE(pipe, label, string); |
134 | |
135 | return (error); |
136 | } |
137 | |
138 | void |
139 | mac_pipe_label_associate(kauth_cred_t cred, struct pipe *cpipe) |
140 | { |
141 | |
142 | MAC_PERFORM(pipe_label_associate, cred, cpipe, cpipe->pipe_label); |
143 | } |
144 | |
145 | int |
146 | mac_pipe_check_kqfilter(kauth_cred_t cred, struct knote *kn, |
147 | struct pipe *cpipe) |
148 | { |
149 | int error; |
150 | |
151 | #if SECURITY_MAC_CHECK_ENFORCE |
152 | /* 21167099 - only check if we allow write */ |
153 | if (!mac_pipe_enforce) |
154 | return (0); |
155 | #endif |
156 | MAC_CHECK(pipe_check_kqfilter, cred, kn, cpipe, cpipe->pipe_label); |
157 | return (error); |
158 | } |
159 | int |
160 | mac_pipe_check_ioctl(kauth_cred_t cred, struct pipe *cpipe, u_int cmd) |
161 | { |
162 | int error; |
163 | |
164 | #if SECURITY_MAC_CHECK_ENFORCE |
165 | /* 21167099 - only check if we allow write */ |
166 | if (!mac_pipe_enforce) |
167 | return (0); |
168 | #endif |
169 | |
170 | MAC_CHECK(pipe_check_ioctl, cred, cpipe, cpipe->pipe_label, cmd); |
171 | |
172 | return (error); |
173 | } |
174 | |
175 | int |
176 | mac_pipe_check_read(kauth_cred_t cred, struct pipe *cpipe) |
177 | { |
178 | int error; |
179 | |
180 | #if SECURITY_MAC_CHECK_ENFORCE |
181 | /* 21167099 - only check if we allow write */ |
182 | if (!mac_pipe_enforce) |
183 | return (0); |
184 | #endif |
185 | |
186 | MAC_CHECK(pipe_check_read, cred, cpipe, cpipe->pipe_label); |
187 | |
188 | return (error); |
189 | } |
190 | |
191 | static int |
192 | mac_pipe_check_label_update(kauth_cred_t cred, struct pipe *cpipe, |
193 | struct label *newlabel) |
194 | { |
195 | int error; |
196 | |
197 | #if SECURITY_MAC_CHECK_ENFORCE |
198 | /* 21167099 - only check if we allow write */ |
199 | if (!mac_pipe_enforce) |
200 | return (0); |
201 | #endif |
202 | |
203 | MAC_CHECK(pipe_check_label_update, cred, cpipe, cpipe->pipe_label, newlabel); |
204 | |
205 | return (error); |
206 | } |
207 | |
208 | int |
209 | mac_pipe_check_select(kauth_cred_t cred, struct pipe *cpipe, int which) |
210 | { |
211 | int error; |
212 | |
213 | #if SECURITY_MAC_CHECK_ENFORCE |
214 | /* 21167099 - only check if we allow write */ |
215 | if (!mac_pipe_enforce) |
216 | return (0); |
217 | #endif |
218 | |
219 | MAC_CHECK(pipe_check_select, cred, cpipe, cpipe->pipe_label, which); |
220 | |
221 | return (error); |
222 | } |
223 | |
224 | int |
225 | mac_pipe_check_stat(kauth_cred_t cred, struct pipe *cpipe) |
226 | { |
227 | int error; |
228 | |
229 | #if SECURITY_MAC_CHECK_ENFORCE |
230 | /* 21167099 - only check if we allow write */ |
231 | if (!mac_pipe_enforce) |
232 | return (0); |
233 | #endif |
234 | |
235 | MAC_CHECK(pipe_check_stat, cred, cpipe, cpipe->pipe_label); |
236 | |
237 | return (error); |
238 | } |
239 | |
240 | int |
241 | mac_pipe_check_write(kauth_cred_t cred, struct pipe *cpipe) |
242 | { |
243 | int error; |
244 | |
245 | #if SECURITY_MAC_CHECK_ENFORCE |
246 | /* 21167099 - only check if we allow write */ |
247 | if (!mac_pipe_enforce) |
248 | return (0); |
249 | #endif |
250 | |
251 | MAC_CHECK(pipe_check_write, cred, cpipe, cpipe->pipe_label); |
252 | |
253 | return (error); |
254 | } |
255 | |
256 | int |
257 | mac_pipe_label_update(kauth_cred_t cred, struct pipe *cpipe, |
258 | struct label *label) |
259 | { |
260 | int error; |
261 | |
262 | error = mac_pipe_check_label_update(cred, cpipe, label); |
263 | if (error) |
264 | return (error); |
265 | |
266 | MAC_PERFORM(pipe_label_update, cred, cpipe, cpipe->pipe_label, label); |
267 | |
268 | return (0); |
269 | } |
270 | |