xref: /freebsd/sys/security/mac_bsdextended/ugidfw_vnode.c (revision b3aaa0cc21c63d388230c7ef2a80abd631ff20d5)
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 
63 int
64 ugidfw_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 
71 int
72 ugidfw_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 
79 int
80 ugidfw_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 
87 int
88 ugidfw_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 
95 int
96 ugidfw_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 
103 int
104 ugidfw_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 
111 int
112 ugidfw_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 
120 int
121 ugidfw_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 
128 int
129 ugidfw_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
130     struct label *vplabel, int attrnamespace, const char *name,
131     struct uio *uio)
132 {
133 
134 	return (ugidfw_check_vp(cred, vp, MBI_READ));
135 }
136 
137 int
138 ugidfw_vnode_check_link(struct ucred *cred, struct vnode *dvp,
139     struct label *dvplabel, struct vnode *vp, struct label *label,
140     struct componentname *cnp)
141 {
142 	int error;
143 
144 	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
145 	if (error)
146 		return (error);
147 	error = ugidfw_check_vp(cred, vp, MBI_WRITE);
148 	if (error)
149 		return (error);
150 	return (0);
151 }
152 
153 int
154 ugidfw_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
155     struct label *vplabel, int attrnamespace)
156 {
157 
158 	return (ugidfw_check_vp(cred, vp, MBI_READ));
159 }
160 
161 int
162 ugidfw_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
163     struct label *dvplabel, struct componentname *cnp)
164 {
165 
166 	return (ugidfw_check_vp(cred, dvp, MBI_EXEC));
167 }
168 
169 int
170 ugidfw_vnode_check_open(struct ucred *cred, struct vnode *vp,
171     struct label *vplabel, accmode_t accmode)
172 {
173 
174 	return (ugidfw_check_vp(cred, vp, ugidfw_accmode2mbi(accmode)));
175 }
176 
177 int
178 ugidfw_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
179     struct label *dvplabel)
180 {
181 
182 	return (ugidfw_check_vp(cred, dvp, MBI_READ));
183 }
184 
185 int
186 ugidfw_vnode_check_readdlink(struct ucred *cred, struct vnode *vp,
187     struct label *vplabel)
188 {
189 
190 	return (ugidfw_check_vp(cred, vp, MBI_READ));
191 }
192 
193 int
194 ugidfw_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
195     struct label *dvplabel, struct vnode *vp, struct label *vplabel,
196     struct componentname *cnp)
197 {
198 	int error;
199 
200 	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
201 	if (error)
202 		return (error);
203 	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
204 }
205 
206 int
207 ugidfw_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
208     struct label *dvplabel, struct vnode *vp, struct label *vplabel,
209     int samedir, struct componentname *cnp)
210 {
211 	int error;
212 
213 	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
214 	if (error)
215 		return (error);
216 	if (vp != NULL)
217 		error = ugidfw_check_vp(cred, vp, MBI_WRITE);
218 	return (error);
219 }
220 
221 int
222 ugidfw_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
223     struct label *vplabel)
224 {
225 
226 	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
227 }
228 
229 int
230 ugidfw_check_setacl_vnode(struct ucred *cred, struct vnode *vp,
231     struct label *vplabel, acl_type_t type, struct acl *acl)
232 {
233 
234 	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
235 }
236 
237 int
238 ugidfw_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
239     struct label *vplabel, int attrnamespace, const char *name,
240     struct uio *uio)
241 {
242 
243 	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
244 }
245 
246 int
247 ugidfw_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
248     struct label *vplabel, u_long flags)
249 {
250 
251 	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
252 }
253 
254 int
255 ugidfw_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
256     struct label *vplabel, mode_t mode)
257 {
258 
259 	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
260 }
261 
262 int
263 ugidfw_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
264     struct label *vplabel, uid_t uid, gid_t gid)
265 {
266 
267 	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
268 }
269 
270 int
271 ugidfw_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
272     struct label *vplabel, struct timespec atime, struct timespec utime)
273 {
274 
275 	return (ugidfw_check_vp(cred, vp, MBI_ADMIN));
276 }
277 
278 int
279 ugidfw_vnode_check_stat(struct ucred *active_cred,
280     struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
281 {
282 
283 	return (ugidfw_check_vp(active_cred, vp, MBI_STAT));
284 }
285 
286 int
287 ugidfw_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
288     struct label *dvplabel, struct vnode *vp, struct label *vplabel,
289     struct componentname *cnp)
290 {
291 	int error;
292 
293 	error = ugidfw_check_vp(cred, dvp, MBI_WRITE);
294 	if (error)
295 		return (error);
296 	return (ugidfw_check_vp(cred, vp, MBI_WRITE));
297 }
298