FreeBSD/Linux Kernel Cross Reference
sys/sys/mac.h
1 /*-
2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
3 * Copyright (c) 2001, 2002, 2003 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed by Robert Watson for the TrustedBSD Project.
7 *
8 * This software was developed for the FreeBSD Project in part by Network
9 * Associates Laboratories, the Security Research Division of Network
10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
11 * as part of the DARPA CHATS research program.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: releng/5.2/sys/sys/mac.h 123173 2003-12-06 21:48:03Z rwatson $
35 */
36 /*
37 * Userland/kernel interface for Mandatory Access Control.
38 *
39 * The POSIX.1e implementation page may be reached at:
40 * http://www.trustedbsd.org/
41 */
42 #ifndef _SYS_MAC_H
43 #define _SYS_MAC_H
44
45 #include <sys/_label.h>
46
47 #ifndef _POSIX_MAC
48 #define _POSIX_MAC
49 #endif
50
51 /*
52 * MAC framework-related constants and limits.
53 */
54 #define MAC_MAX_POLICY_NAME 32
55 #define MAC_MAX_LABEL_ELEMENT_NAME 32
56 #define MAC_MAX_LABEL_ELEMENT_DATA 4096
57 #define MAC_MAX_LABEL_BUF_LEN 8192
58
59 struct mac {
60 size_t m_buflen;
61 char *m_string;
62 };
63
64 typedef struct mac *mac_t;
65
66 #ifndef _KERNEL
67
68 /*
69 * Location of the userland MAC framework configuration file. mac.conf
70 * binds policy names to shared libraries that understand those policies,
71 * as well as setting defaults for MAC-aware applications.
72 */
73 #define MAC_CONFFILE "/etc/mac.conf"
74
75 /*
76 * Extended non-POSIX.1e interfaces that offer additional services
77 * available from the userland and kernel MAC frameworks.
78 */
79 __BEGIN_DECLS
80 int mac_execve(char *fname, char **argv, char **envv, mac_t _label);
81 int mac_free(mac_t _label);
82 int mac_from_text(mac_t *_label, const char *_text);
83 int mac_get_fd(int _fd, mac_t _label);
84 int mac_get_file(const char *_path, mac_t _label);
85 int mac_get_link(const char *_path, mac_t _label);
86 int mac_get_peer(int _fd, mac_t _label);
87 int mac_get_pid(pid_t _pid, mac_t _label);
88 int mac_get_proc(mac_t _label);
89 int mac_is_present(const char *_policyname);
90 int mac_prepare(mac_t *_label, const char *_elements);
91 int mac_prepare_file_label(mac_t *_label);
92 int mac_prepare_ifnet_label(mac_t *_label);
93 int mac_prepare_process_label(mac_t *_label);
94 int mac_prepare_type(mac_t *_label, const char *_type);
95 int mac_set_fd(int _fildes, const mac_t _label);
96 int mac_set_file(const char *_path, mac_t _label);
97 int mac_set_link(const char *_path, mac_t _label);
98 int mac_set_proc(const mac_t _label);
99 int mac_syscall(const char *_policyname, int _call, void *_arg);
100 int mac_to_text(mac_t mac, char **_text);
101 __END_DECLS
102
103 #else /* _KERNEL */
104
105 /*
106 * Kernel functions to manage and evaluate labels.
107 */
108 struct bpf_d;
109 struct componentname;
110 struct devfs_dirent;
111 struct ifnet;
112 struct ifreq;
113 struct inpcb;
114 struct image_params;
115 struct inpcb;
116 struct ipq;
117 struct m_tag;
118 struct mbuf;
119 struct mount;
120 struct proc;
121 struct sockaddr;
122 struct socket;
123 struct pipe;
124 struct thread;
125 struct timespec;
126 struct ucred;
127 struct uio;
128 struct vattr;
129 struct vnode;
130
131 #include <sys/acl.h> /* XXX acl_type_t */
132
133 struct vop_setlabel_args;
134
135 /*
136 * Label operations.
137 */
138 void mac_init_bpfdesc(struct bpf_d *);
139 void mac_init_cred(struct ucred *);
140 void mac_init_devfsdirent(struct devfs_dirent *);
141 void mac_init_ifnet(struct ifnet *);
142 int mac_init_inpcb(struct inpcb *, int flag);
143 int mac_init_ipq(struct ipq *, int flag);
144 int mac_init_socket(struct socket *, int flag);
145 void mac_init_pipe(struct pipe *);
146 int mac_init_mbuf(struct mbuf *mbuf, int flag);
147 int mac_init_mbuf_tag(struct m_tag *, int flag);
148 void mac_init_mount(struct mount *);
149 void mac_init_proc(struct proc *);
150 void mac_init_vnode(struct vnode *);
151 void mac_copy_mbuf_tag(struct m_tag *, struct m_tag *);
152 void mac_copy_vnode_label(struct label *, struct label *label);
153 void mac_destroy_bpfdesc(struct bpf_d *);
154 void mac_destroy_cred(struct ucred *);
155 void mac_destroy_devfsdirent(struct devfs_dirent *);
156 void mac_destroy_ifnet(struct ifnet *);
157 void mac_destroy_inpcb(struct inpcb *);
158 void mac_destroy_ipq(struct ipq *);
159 void mac_destroy_socket(struct socket *);
160 void mac_destroy_pipe(struct pipe *);
161 void mac_destroy_proc(struct proc *);
162 void mac_destroy_mbuf_tag(struct m_tag *);
163 void mac_destroy_mount(struct mount *);
164 void mac_destroy_vnode(struct vnode *);
165
166 struct label *mac_cred_label_alloc(void);
167 void mac_cred_label_free(struct label *label);
168 struct label *mac_vnode_label_alloc(void);
169 void mac_vnode_label_free(struct label *label);
170
171 /*
172 * Labeling event operations: file system objects, and things that
173 * look a lot like file system objects.
174 */
175 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de,
176 struct vnode *vp);
177 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp);
178 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp);
179 void mac_create_devfs_device(struct mount *mp, dev_t dev,
180 struct devfs_dirent *de);
181 void mac_create_devfs_directory(struct mount *mp, char *dirname,
182 int dirnamelen, struct devfs_dirent *de);
183 void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp,
184 struct devfs_dirent *dd, struct devfs_dirent *de);
185 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
186 struct vnode *dvp, struct vnode *vp, struct componentname *cnp);
187 void mac_create_mount(struct ucred *cred, struct mount *mp);
188 void mac_create_root_mount(struct ucred *cred, struct mount *mp);
189 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp,
190 struct label *newlabel);
191 void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de,
192 struct vnode *vp);
193
194 /*
195 * Labeling event operations: IPC objects.
196 */
197 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m);
198 void mac_create_socket(struct ucred *cred, struct socket *socket);
199 void mac_create_socket_from_socket(struct socket *oldsocket,
200 struct socket *newsocket);
201 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf,
202 struct socket *socket);
203 void mac_set_socket_peer_from_socket(struct socket *oldsocket,
204 struct socket *newsocket);
205 void mac_create_pipe(struct ucred *cred, struct pipe *pipe);
206
207 /*
208 * Labeling event operations: network objects.
209 */
210 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d);
211 void mac_create_ifnet(struct ifnet *ifp);
212 void mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp);
213 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq);
214 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram);
215 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment);
216 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf);
217 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m);
218 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m);
219 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m);
220 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf,
221 struct ifnet *ifnet, struct mbuf *newmbuf);
222 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf);
223 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq);
224 void mac_reflect_mbuf_icmp(struct mbuf *m);
225 void mac_reflect_mbuf_tcp(struct mbuf *m);
226 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq);
227 void mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp);
228
229 /*
230 * Labeling event operations: processes.
231 */
232 void mac_copy_cred(struct ucred *cr1, struct ucred *cr2);
233 int mac_execve_enter(struct image_params *imgp, struct mac *mac_p);
234 void mac_execve_exit(struct image_params *imgp);
235 void mac_execve_transition(struct ucred *old, struct ucred *new,
236 struct vnode *vp, struct label *interpvnodelabel,
237 struct image_params *imgp);
238 int mac_execve_will_transition(struct ucred *old, struct vnode *vp,
239 struct label *interpvnodelabel, struct image_params *imgp);
240 void mac_create_proc0(struct ucred *cred);
241 void mac_create_proc1(struct ucred *cred);
242 void mac_thread_userret(struct thread *td);
243
244 /* Access control checks. */
245 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet);
246 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2);
247 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m);
248 int mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m);
249 int mac_check_kenv_dump(struct ucred *cred);
250 int mac_check_kenv_get(struct ucred *cred, char *name);
251 int mac_check_kenv_set(struct ucred *cred, char *name, char *value);
252 int mac_check_kenv_unset(struct ucred *cred, char *name);
253 int mac_check_kld_load(struct ucred *cred, struct vnode *vp);
254 int mac_check_kld_stat(struct ucred *cred);
255 int mac_check_kld_unload(struct ucred *cred);
256 int mac_check_mount_stat(struct ucred *cred, struct mount *mp);
257 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe,
258 unsigned long cmd, void *data);
259 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe);
260 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe);
261 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe);
262 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe);
263 int mac_check_proc_debug(struct ucred *cred, struct proc *proc);
264 int mac_check_proc_sched(struct ucred *cred, struct proc *proc);
265 int mac_check_proc_signal(struct ucred *cred, struct proc *proc,
266 int signum);
267 int mac_check_socket_bind(struct ucred *cred, struct socket *so,
268 struct sockaddr *sockaddr);
269 int mac_check_socket_connect(struct ucred *cred, struct socket *so,
270 struct sockaddr *sockaddr);
271 int mac_check_socket_deliver(struct socket *so, struct mbuf *m);
272 int mac_check_socket_listen(struct ucred *cred, struct socket *so);
273 int mac_check_socket_receive(struct ucred *cred, struct socket *so);
274 int mac_check_socket_send(struct ucred *cred, struct socket *so);
275 int mac_check_socket_visible(struct ucred *cred, struct socket *so);
276 int mac_check_sysarch_ioperm(struct ucred *cred);
277 int mac_check_system_acct(struct ucred *cred, struct vnode *vp);
278 int mac_check_system_nfsd(struct ucred *cred);
279 int mac_check_system_reboot(struct ucred *cred, int howto);
280 int mac_check_system_settime(struct ucred *cred);
281 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp);
282 int mac_check_system_swapoff(struct ucred *cred, struct vnode *vp);
283 int mac_check_system_sysctl(struct ucred *cred, int *name,
284 u_int namelen, void *old, size_t *oldlenp, int inkernel,
285 void *new, size_t newlen);
286 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp,
287 int acc_mode);
288 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp);
289 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp);
290 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
291 struct componentname *cnp, struct vattr *vap);
292 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp,
293 struct vnode *vp, struct componentname *cnp);
294 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
295 acl_type_t type);
296 int mac_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp,
297 int attrnamespace, const char *name);
298 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp,
299 struct image_params *imgp);
300 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp,
301 acl_type_t type);
302 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
303 int attrnamespace, const char *name, struct uio *uio);
304 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
305 struct vnode *vp, struct componentname *cnp);
306 int mac_check_vnode_listextattr(struct ucred *cred, struct vnode *vp,
307 int attrnamespace);
308 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
309 struct componentname *cnp);
310 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
311 int prot);
312 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp,
313 int prot);
314 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp,
315 int acc_mode);
316 int mac_check_vnode_poll(struct ucred *active_cred,
317 struct ucred *file_cred, struct vnode *vp);
318 int mac_check_vnode_read(struct ucred *active_cred,
319 struct ucred *file_cred, struct vnode *vp);
320 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp);
321 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp);
322 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
323 struct vnode *vp, struct componentname *cnp);
324 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
325 struct vnode *vp, int samedir, struct componentname *cnp);
326 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp);
327 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
328 acl_type_t type, struct acl *acl);
329 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
330 int attrnamespace, const char *name, struct uio *uio);
331 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
332 u_long flags);
333 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
334 mode_t mode);
335 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
336 uid_t uid, gid_t gid);
337 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
338 struct timespec atime, struct timespec mtime);
339 int mac_check_vnode_stat(struct ucred *active_cred,
340 struct ucred *file_cred, struct vnode *vp);
341 int mac_check_vnode_write(struct ucred *active_cred,
342 struct ucred *file_cred, struct vnode *vp);
343 int mac_getsockopt_label(struct ucred *cred, struct socket *so,
344 struct mac *extmac);
345 int mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so,
346 struct mac *extmac);
347 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
348 struct ifnet *ifnet);
349 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr,
350 struct ifnet *ifnet);
351 int mac_setsockopt_label(struct ucred *cred, struct socket *so,
352 struct mac *extmac);
353 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe,
354 struct label *label);
355 void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred);
356
357 /*
358 * Calls to help various file systems implement labeling functionality
359 * using their existing EA implementation.
360 */
361 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap);
362
363 #endif /* !_KERNEL */
364
365 #endif /* !_SYS_MAC_H */
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