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) 2003-2004 Networks Associates Technology, Inc.
30 * All rights reserved.
31 *
32 * This software was developed for the FreeBSD Project in part by Network
33 * Associates Laboratories, the Security Research Division of Network
34 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
35 * as part of the DARPA CHATS research program.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 */
58
59#include <sys/cdefs.h>
60
61#include <sys/param.h>
62#include <sys/kernel.h>
63#include <sys/lock.h>
64#include <sys/malloc.h>
65#include <sys/sbuf.h>
66#include <sys/systm.h>
67#include <sys/vnode.h>
68#include <sys/mount.h>
69#include <sys/file.h>
70#include <sys/namei.h>
71#include <sys/sysctl.h>
72#include <sys/sem.h>
73#include <sys/sem_internal.h>
74
75#include <security/mac_internal.h>
76
77
78static struct label *
79mac_sysv_sem_label_alloc(void)
80{
81 struct label *label;
82
83 label = mac_labelzone_alloc(MAC_WAITOK);
84 if (label == NULL)
85 return (NULL);
86 MAC_PERFORM(sysvsem_label_init, label);
87 return (label);
88}
89
90void
91mac_sysvsem_label_init(struct semid_kernel *semakptr)
92{
93
94 semakptr->label = mac_sysv_sem_label_alloc();
95}
96
97static void
98mac_sysv_sem_label_free(struct label *label)
99{
100
101 MAC_PERFORM(sysvsem_label_destroy, label);
102 mac_labelzone_free(label);
103}
104
105void
106mac_sysvsem_label_destroy(struct semid_kernel *semakptr)
107{
108
109 mac_sysv_sem_label_free(semakptr->label);
110 semakptr->label = NULL;
111}
112
113void
114mac_sysvsem_label_associate(kauth_cred_t cred, struct semid_kernel *semakptr)
115{
116
117 MAC_PERFORM(sysvsem_label_associate, cred, semakptr, semakptr->label);
118}
119
120void
121mac_sysvsem_label_recycle(struct semid_kernel *semakptr)
122{
123
124 MAC_PERFORM(sysvsem_label_recycle, semakptr->label);
125}
126
127int
128mac_sysvsem_check_semctl(kauth_cred_t cred, struct semid_kernel *semakptr,
129 int cmd)
130{
131 int error;
132
133#if SECURITY_MAC_CHECK_ENFORCE
134 /* 21167099 - only check if we allow write */
135 if (!mac_sysvsem_enforce)
136 return (0);
137#endif
138
139 MAC_CHECK(sysvsem_check_semctl, cred, semakptr, semakptr->label, cmd);
140
141 return(error);
142}
143
144int
145mac_sysvsem_check_semget(kauth_cred_t cred, struct semid_kernel *semakptr)
146{
147 int error;
148
149#if SECURITY_MAC_CHECK_ENFORCE
150 /* 21167099 - only check if we allow write */
151 if (!mac_sysvsem_enforce)
152 return (0);
153#endif
154
155 MAC_CHECK(sysvsem_check_semget, cred, semakptr, semakptr->label);
156
157 return(error);
158}
159
160int
161mac_sysvsem_check_semop(kauth_cred_t cred, struct semid_kernel *semakptr,
162 size_t accesstype)
163{
164 int error;
165
166#if SECURITY_MAC_CHECK_ENFORCE
167 /* 21167099 - only check if we allow write */
168 if (!mac_sysvsem_enforce)
169 return (0);
170#endif
171
172 MAC_CHECK(sysvsem_check_semop, cred, semakptr, semakptr->label,
173 accesstype);
174
175 return(error);
176}
177