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
75static struct label *
76mac_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 }
84 MAC_PERFORM(pipe_label_init, label);
85 return label;
86}
87
88struct label *
89mac_pipe_label(struct pipe *cpipe)
90{
91 return cpipe->pipe_label;
92}
93
94void
95mac_pipe_set_label(struct pipe *cpipe, struct label *label)
96{
97 cpipe->pipe_label = label;
98}
99
100void
101mac_pipe_label_init(struct pipe *cpipe)
102{
103 mac_pipe_set_label(cpipe, label: mac_pipe_label_alloc());
104}
105
106void
107mac_pipe_label_free(struct label *label)
108{
109 MAC_PERFORM(pipe_label_destroy, label);
110 mac_labelzone_free(l: label);
111}
112
113void
114mac_pipe_label_destroy(struct pipe *cpipe)
115{
116 struct label *label = mac_pipe_label(cpipe);
117 mac_pipe_set_label(cpipe, NULL);
118 mac_pipe_label_free(label);
119}
120
121void
122mac_pipe_label_associate(kauth_cred_t cred, struct pipe *cpipe)
123{
124 MAC_PERFORM(pipe_label_associate, cred, cpipe, mac_pipe_label(cpipe));
125}
126
127int
128mac_pipe_check_kqfilter(kauth_cred_t cred, struct knote *kn,
129 struct pipe *cpipe)
130{
131 int error;
132
133#if SECURITY_MAC_CHECK_ENFORCE
134 /* 21167099 - only check if we allow write */
135 if (!mac_pipe_enforce) {
136 return 0;
137 }
138#endif
139 MAC_CHECK(pipe_check_kqfilter, cred, kn, cpipe, mac_pipe_label(cpipe));
140 return error;
141}
142int
143mac_pipe_check_ioctl(kauth_cred_t cred, struct pipe *cpipe, u_long cmd)
144{
145 int error;
146
147#if SECURITY_MAC_CHECK_ENFORCE
148 /* 21167099 - only check if we allow write */
149 if (!mac_pipe_enforce) {
150 return 0;
151 }
152#endif
153
154 MAC_CHECK(pipe_check_ioctl, cred, cpipe, mac_pipe_label(cpipe), cmd);
155
156 return error;
157}
158
159int
160mac_pipe_check_read(kauth_cred_t cred, struct pipe *cpipe)
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 }
169#endif
170
171 MAC_CHECK(pipe_check_read, cred, cpipe, mac_pipe_label(cpipe));
172
173 return error;
174}
175
176int
177mac_pipe_check_select(kauth_cred_t cred, struct pipe *cpipe, int which)
178{
179 int error;
180
181#if SECURITY_MAC_CHECK_ENFORCE
182 /* 21167099 - only check if we allow write */
183 if (!mac_pipe_enforce) {
184 return 0;
185 }
186#endif
187
188 MAC_CHECK(pipe_check_select, cred, cpipe, mac_pipe_label(cpipe), which);
189
190 return error;
191}
192
193int
194mac_pipe_check_stat(kauth_cred_t cred, struct pipe *cpipe)
195{
196 int error;
197
198#if SECURITY_MAC_CHECK_ENFORCE
199 /* 21167099 - only check if we allow write */
200 if (!mac_pipe_enforce) {
201 return 0;
202 }
203#endif
204
205 MAC_CHECK(pipe_check_stat, cred, cpipe, mac_pipe_label(cpipe));
206
207 return error;
208}
209
210int
211mac_pipe_check_write(kauth_cred_t cred, struct pipe *cpipe)
212{
213 int error;
214
215#if SECURITY_MAC_CHECK_ENFORCE
216 /* 21167099 - only check if we allow write */
217 if (!mac_pipe_enforce) {
218 return 0;
219 }
220#endif
221
222 MAC_CHECK(pipe_check_write, cred, cpipe, mac_pipe_label(cpipe));
223
224 return error;
225}
226