1/*-
2 * Copyright (c) 1999-2002, 2007-2008 Robert N. M. Watson
3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
4 * Copyright (c) 2005 Tom Rhodes
5 * Copyright (c) 2006 SPARTA, Inc.
6 * All rights reserved.
7 *
8 * This software was developed by Robert Watson for the TrustedBSD Project.
9 * It was later enhanced by Tom Rhodes for the TrustedBSD Project.
10 *
11 * This software was developed for the FreeBSD Project in part by Network
12 * Associates Laboratories, the Security Research Division of Network
13 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
14 * as part of the DARPA CHATS research program.
15 *
16 * This software was enhanced by SPARTA ISSO under SPAWAR contract
17 * N66001-04-C-6019 ("SEFOS").
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 *    notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 *    notice, this list of conditions and the following disclaimer in the
26 *    documentation and/or other materials provided with the distribution.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * $FreeBSD$
41 */
42
43#include <sys/param.h>
44#include <sys/acl.h>
45#include <sys/kernel.h>
46#include <sys/jail.h>
47#include <sys/lock.h>
48#include <sys/malloc.h>
49#include <sys/module.h>
50#include <sys/mount.h>
51#include <sys/mutex.h>
52#include <sys/priv.h>
53#include <sys/systm.h>
54#include <sys/vnode.h>
55#include <sys/sysctl.h>
56#include <sys/syslog.h>
57#include <sys/stat.h>
58
59#include <security/mac/mac_policy.h>
60#include <security/mac_bsdextended/mac_bsdextended.h>
61#include <security/mac_bsdextended/ugidfw_internal.h>
62
63int
64ugidfw_vnode_check_access(struct ucred *cred, struct vnode *vp,
65    struct label *vplabel, accmode_t accmode)
66{
67
68	return (ugidfw_check_vp(cred, vp, ugidfw_accmode2mbi(accmode)));
69}
70
71int
72ugidfw_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
73    struct label *dvplabel)
74{
75
76	return (ugidfw_check_vp(cred, dvp, MBI_EXEC));
77}
78
79int
80ugidfw_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
81    struct label *dvplabel)
82{
83
84	return (ugidfw_check_vp(cred, dvp, MBI_EXEC));
85}
86
87int
88ugidfw_check_create_vnode(struct ucred *cred, struct vnode *dvp,
89    struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
90{
91
92	return (ugidfw_check_vp(cred, dvp, MBI_WRITE));
93}
94
95int
96ugidfw_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
97    struct label *vplabel, acl_type_t type)
98{
99
100	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
101}
102
103int
104ugidfw_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
105    struct label *vplabel, int attrnamespace, const char *name)
106{
107
108	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
109}
110
111int
112ugidfw_vnode_check_exec(struct ucred *cred, struct vnode *vp,
113    struct label *vplabel, struct image_params *imgp,
114    struct label *execlabel)
115{
116
117	return (ugidfw_check_vp(cred, vp, MBI_READ|MBI_EXEC));
118}
119
120int
121ugidfw_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
122    struct label *vplabel, acl_type_t type)
123{
124
125	return (ugidfw_check_vp(cred, vp, MBI_STAT));
126}
127
128int
129ugidfw_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
130    struct label *vplabel, int attrnamespace, const char *name)
131{
132
133	return (ugidfw_check_vp(cred, vp, MBI_READ));
134}
135
136int
137ugidfw_vnode_check_link(struct ucred *cred, struct vnode *dvp,
138    struct label *dvplabel, struct vnode *vp, struct label *label,
139    struct componentname *cnp)
140{
141	int error;
142
143	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
144	if (error)
145		return (error);
146	error = ugidfw_check_vp(cred, vp, MBI_WRITE);
147	if (error)
148		return (error);
149	return (0);
150}
151
152int
153ugidfw_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
154    struct label *vplabel, int attrnamespace)
155{
156
157	return (ugidfw_check_vp(cred, vp, MBI_READ));
158}
159
160int
161ugidfw_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
162    struct label *dvplabel, struct componentname *cnp)
163{
164
165	return (ugidfw_check_vp(cred, dvp, MBI_EXEC));
166}
167
168int
169ugidfw_vnode_check_open(struct ucred *cred, struct vnode *vp,
170    struct label *vplabel, accmode_t accmode)
171{
172
173	return (ugidfw_check_vp(cred, vp, ugidfw_accmode2mbi(accmode)));
174}
175
176int
177ugidfw_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
178    struct label *dvplabel)
179{
180
181	return (ugidfw_check_vp(cred, dvp, MBI_READ));
182}
183
184int
185ugidfw_vnode_check_readdlink(struct ucred *cred, struct vnode *vp,
186    struct label *vplabel)
187{
188
189	return (ugidfw_check_vp(cred, vp, MBI_READ));
190}
191
192int
193ugidfw_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
194    struct label *dvplabel, struct vnode *vp, struct label *vplabel,
195    struct componentname *cnp)
196{
197	int error;
198
199	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
200	if (error)
201		return (error);
202	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
203}
204
205int
206ugidfw_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
207    struct label *dvplabel, struct vnode *vp, struct label *vplabel,
208    int samedir, struct componentname *cnp)
209{
210	int error;
211
212	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
213	if (error)
214		return (error);
215	if (vp != NULL)
216		error = ugidfw_check_vp(cred, vp, MBI_WRITE);
217	return (error);
218}
219
220int
221ugidfw_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
222    struct label *vplabel)
223{
224
225	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
226}
227
228int
229ugidfw_check_setacl_vnode(struct ucred *cred, struct vnode *vp,
230    struct label *vplabel, acl_type_t type, struct acl *acl)
231{
232
233	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
234}
235
236int
237ugidfw_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
238    struct label *vplabel, int attrnamespace, const char *name)
239{
240
241	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
242}
243
244int
245ugidfw_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
246    struct label *vplabel, u_long flags)
247{
248
249	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
250}
251
252int
253ugidfw_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
254    struct label *vplabel, mode_t mode)
255{
256
257	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
258}
259
260int
261ugidfw_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
262    struct label *vplabel, uid_t uid, gid_t gid)
263{
264
265	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
266}
267
268int
269ugidfw_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
270    struct label *vplabel, struct timespec atime, struct timespec utime)
271{
272
273	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
274}
275
276int
277ugidfw_vnode_check_stat(struct ucred *active_cred,
278    struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
279{
280
281	return (ugidfw_check_vp(active_cred, vp, MBI_STAT));
282}
283
284int
285ugidfw_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
286    struct label *dvplabel, struct vnode *vp, struct label *vplabel,
287    struct componentname *cnp)
288{
289	int error;
290
291	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
292	if (error)
293		return (error);
294	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
295}
296