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
75struct 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 MAC_PERFORM(pipe_label_init, label);
84 return (label);
85}
86
87void
88mac_pipe_label_init(struct pipe *cpipe)
89{
90
91 cpipe->pipe_label = mac_pipe_label_alloc();
92}
93
94void
95mac_pipe_label_free(struct label *label)
96{
97
98 MAC_PERFORM(pipe_label_destroy, label);
99 mac_labelzone_free(label);
100}
101
102void
103mac_pipe_label_destroy(struct pipe *cpipe)
104{
105
106 mac_pipe_label_free(cpipe->pipe_label);
107 cpipe->pipe_label = NULL;
108}
109
110void
111mac_pipe_label_copy(struct label *src, struct label *dest)
112{
113
114 MAC_PERFORM(pipe_label_copy, src, dest);
115}
116
117int
118mac_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
128int
129mac_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
138void
139mac_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
145int
146mac_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}
159int
160mac_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
175int
176mac_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
191static int
192mac_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
208int
209mac_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
224int
225mac_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
240int
241mac_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
256int
257mac_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