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 (!mac_pipe_enforce)
152		return (0);
153
154	MAC_CHECK(pipe_check_kqfilter, cred, kn, cpipe, cpipe->pipe_label);
155	return (error);
156}
157int
158mac_pipe_check_ioctl(kauth_cred_t cred, struct pipe *cpipe, u_int cmd)
159{
160	int error;
161
162	if (!mac_pipe_enforce)
163		return (0);
164
165	MAC_CHECK(pipe_check_ioctl, cred, cpipe, cpipe->pipe_label, cmd);
166
167	return (error);
168}
169
170int
171mac_pipe_check_read(kauth_cred_t cred, struct pipe *cpipe)
172{
173	int error;
174
175	if (!mac_pipe_enforce)
176		return (0);
177
178	MAC_CHECK(pipe_check_read, cred, cpipe, cpipe->pipe_label);
179
180	return (error);
181}
182
183static int
184mac_pipe_check_label_update(kauth_cred_t cred, struct pipe *cpipe,
185    struct label *newlabel)
186{
187	int error;
188
189	if (!mac_pipe_enforce)
190		return (0);
191
192	MAC_CHECK(pipe_check_label_update, cred, cpipe, cpipe->pipe_label, newlabel);
193
194	return (error);
195}
196
197int
198mac_pipe_check_select(kauth_cred_t cred, struct pipe *cpipe, int which)
199{
200	int error;
201
202	if (!mac_pipe_enforce)
203		return (0);
204
205	MAC_CHECK(pipe_check_select, cred, cpipe, cpipe->pipe_label, which);
206
207	return (error);
208}
209
210int
211mac_pipe_check_stat(kauth_cred_t cred, struct pipe *cpipe)
212{
213	int error;
214
215	if (!mac_pipe_enforce)
216		return (0);
217
218	MAC_CHECK(pipe_check_stat, cred, cpipe, cpipe->pipe_label);
219
220	return (error);
221}
222
223int
224mac_pipe_check_write(kauth_cred_t cred, struct pipe *cpipe)
225{
226	int error;
227
228	if (!mac_pipe_enforce)
229		return (0);
230
231	MAC_CHECK(pipe_check_write, cred, cpipe, cpipe->pipe_label);
232
233	return (error);
234}
235
236int
237mac_pipe_label_update(kauth_cred_t cred, struct pipe *cpipe,
238    struct label *label)
239{
240	int error;
241
242	error = mac_pipe_check_label_update(cred, cpipe, label);
243	if (error)
244		return (error);
245
246	MAC_PERFORM(pipe_label_update, cred, cpipe, cpipe->pipe_label, label);
247
248	return (0);
249}
250