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: releng/9.0/sys/security/mac_bsdextended/ugidfw_vnode.c 189533 2009-03-08 12:32:06Z rwatson $
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 {
132
133 return (ugidfw_check_vp(cred, vp, MBI_READ));
134 }
135
136 int
137 ugidfw_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
152 int
153 ugidfw_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
160 int
161 ugidfw_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
168 int
169 ugidfw_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
176 int
177 ugidfw_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
184 int
185 ugidfw_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
192 int
193 ugidfw_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
205 int
206 ugidfw_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
220 int
221 ugidfw_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
228 int
229 ugidfw_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
236 int
237 ugidfw_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
244 int
245 ugidfw_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
252 int
253 ugidfw_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
260 int
261 ugidfw_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
268 int
269 ugidfw_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
276 int
277 ugidfw_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
284 int
285 ugidfw_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 }
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