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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: head/sys/security/mac/mac_framework.h 119546 2003-08-29 02:43:57Z rwatson $
34 * $FreeBSD: head/sys/security/mac/mac_framework.h 120657 2003-10-02 03:07:51Z 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
59struct mac {
60 size_t m_buflen;
61 char *m_string;
62};
63
64typedef 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
80int mac_execve(char *fname, char **argv, char **envv, mac_t _label);
81int mac_free(mac_t _label);
82int mac_from_text(mac_t *_label, const char *_text);
83int mac_get_fd(int _fd, mac_t _label);
84int mac_get_file(const char *_path, mac_t _label);
85int mac_get_link(const char *_path, mac_t _label);
86int mac_get_pid(pid_t _pid, mac_t _label);
87int mac_get_proc(mac_t _label);
88int mac_is_present(const char *_policyname);
89int mac_prepare(mac_t *_label, const char *_elements);
90int mac_prepare_file_label(mac_t *_label);
91int mac_prepare_ifnet_label(mac_t *_label);
92int mac_prepare_process_label(mac_t *_label);
93int mac_prepare_type(mac_t *_label, const char *_type);
94int mac_set_fd(int _fildes, const mac_t _label);
95int mac_set_file(const char *_path, mac_t _label);
96int mac_set_link(const char *_path, mac_t _label);
97int mac_set_proc(const mac_t _label);
98int mac_syscall(const char *_policyname, int _call, void *_arg);
99int mac_to_text(mac_t mac, char **_text);
100__END_DECLS
101
102#else /* _KERNEL */
103
104/*
105 * Kernel functions to manage and evaluate labels.
106 */
107struct bpf_d;
108struct componentname;
109struct devfs_dirent;
110struct ifnet;
111struct ifreq;
112struct image_params;
113struct ipq;
114struct m_tag;
115struct mbuf;
116struct mount;
117struct proc;
118struct sockaddr;
119struct socket;
120struct pipe;
121struct thread;
122struct timespec;
123struct ucred;
124struct uio;
125struct vattr;
126struct vnode;
127
128#include <sys/acl.h> /* XXX acl_type_t */
129
130struct vop_setlabel_args;
131
132/*
133 * Label operations.
134 */
135void mac_init_bpfdesc(struct bpf_d *);
136void mac_init_cred(struct ucred *);
137void mac_init_devfsdirent(struct devfs_dirent *);
138void mac_init_ifnet(struct ifnet *);
139int mac_init_ipq(struct ipq *, int flag);
140int mac_init_socket(struct socket *, int flag);
141void mac_init_pipe(struct pipe *);
142int mac_init_mbuf(struct mbuf *mbuf, int flag);
143int mac_init_mbuf_tag(struct m_tag *, int flag);
144void mac_init_mount(struct mount *);
145void mac_init_proc(struct proc *);
146void mac_init_vnode(struct vnode *);
147void mac_init_vnode_label(struct label *);
148void mac_copy_mbuf_tag(struct m_tag *, struct m_tag *);
149void mac_copy_vnode_label(struct label *, struct label *label);
150void mac_destroy_bpfdesc(struct bpf_d *);
151void mac_destroy_cred(struct ucred *);
152void mac_destroy_devfsdirent(struct devfs_dirent *);
153void mac_destroy_ifnet(struct ifnet *);
154void mac_destroy_ipq(struct ipq *);
155void mac_destroy_socket(struct socket *);
156void mac_destroy_pipe(struct pipe *);
157void mac_destroy_proc(struct proc *);
158void mac_destroy_mbuf_tag(struct m_tag *);
159void mac_destroy_mount(struct mount *);
160void mac_destroy_vnode(struct vnode *);
161void mac_destroy_vnode_label(struct label *);
162
163/*
164 * Labeling event operations: file system objects, and things that
165 * look a lot like file system objects.
166 */
167void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de,
168 struct vnode *vp);
169int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp);
170void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp);
171void mac_create_devfs_device(struct mount *mp, dev_t dev,
172 struct devfs_dirent *de);
173void mac_create_devfs_directory(struct mount *mp, char *dirname,
174 int dirnamelen, struct devfs_dirent *de);
175void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp,
176 struct devfs_dirent *dd, struct devfs_dirent *de);
177int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
178 struct vnode *dvp, struct vnode *vp, struct componentname *cnp);
179void mac_create_mount(struct ucred *cred, struct mount *mp);
180void mac_create_root_mount(struct ucred *cred, struct mount *mp);
181void mac_relabel_vnode(struct ucred *cred, struct vnode *vp,
182 struct label *newlabel);
183void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de,
184 struct vnode *vp);
185
186/*
187 * Labeling event operations: IPC objects.
188 */
189void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m);
190void mac_create_socket(struct ucred *cred, struct socket *socket);
191void mac_create_socket_from_socket(struct socket *oldsocket,
192 struct socket *newsocket);
193void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf,
194 struct socket *socket);
195void mac_set_socket_peer_from_socket(struct socket *oldsocket,
196 struct socket *newsocket);
197void mac_create_pipe(struct ucred *cred, struct pipe *pipe);
198
199/*
200 * Labeling event operations: network objects.
201 */
202void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d);
203void mac_create_ifnet(struct ifnet *ifp);
204void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq);
205void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram);
206void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment);
207void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf);
208void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m);
209void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m);
210void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m);
211void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf,
212 struct ifnet *ifnet, struct mbuf *newmbuf);
213void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf);
214int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq);
215void mac_reflect_mbuf_icmp(struct mbuf *m);
216void mac_reflect_mbuf_tcp(struct mbuf *m);
217void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq);
218
219/*
220 * Labeling event operations: processes.
221 */
222void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child);
223int mac_execve_enter(struct image_params *imgp, struct mac *mac_p,
224 struct label *execlabel);
225void mac_execve_exit(struct image_params *imgp);
226void mac_execve_transition(struct ucred *old, struct ucred *new,
227 struct vnode *vp, struct label *interpvnodelabel,
228 struct image_params *imgp);
229int mac_execve_will_transition(struct ucred *old, struct vnode *vp,
230 struct label *interpvnodelabel, struct image_params *imgp);
231void mac_create_proc0(struct ucred *cred);
232void mac_create_proc1(struct ucred *cred);
233void mac_thread_userret(struct thread *td);
234
235/* Access control checks. */
236int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet);
237int mac_check_cred_visible(struct ucred *u1, struct ucred *u2);
238int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m);
239int mac_check_kenv_dump(struct ucred *cred);
240int mac_check_kenv_get(struct ucred *cred, char *name);
241int mac_check_kenv_set(struct ucred *cred, char *name, char *value);
242int mac_check_kenv_unset(struct ucred *cred, char *name);
243int mac_check_kld_load(struct ucred *cred, struct vnode *vp);
244int mac_check_kld_stat(struct ucred *cred);
245int mac_check_kld_unload(struct ucred *cred);
246int mac_check_mount_stat(struct ucred *cred, struct mount *mp);
247int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe,
248 unsigned long cmd, void *data);
249int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe);
250int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe);
251int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe);
252int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe);
253int mac_check_proc_debug(struct ucred *cred, struct proc *proc);
254int mac_check_proc_sched(struct ucred *cred, struct proc *proc);
255int mac_check_proc_signal(struct ucred *cred, struct proc *proc,
256 int signum);
257int mac_check_socket_bind(struct ucred *cred, struct socket *so,
258 struct sockaddr *sockaddr);
259int mac_check_socket_connect(struct ucred *cred, struct socket *so,
260 struct sockaddr *sockaddr);
261int mac_check_socket_deliver(struct socket *so, struct mbuf *m);
262int mac_check_socket_listen(struct ucred *cred, struct socket *so);
263int mac_check_socket_receive(struct ucred *cred, struct socket *so);
264int mac_check_socket_send(struct ucred *cred, struct socket *so);
265int mac_check_socket_visible(struct ucred *cred, struct socket *so);
266int mac_check_sysarch_ioperm(struct ucred *cred);
267int mac_check_system_acct(struct ucred *cred, struct vnode *vp);
268int mac_check_system_nfsd(struct ucred *cred);
269int mac_check_system_reboot(struct ucred *cred, int howto);
270int mac_check_system_settime(struct ucred *cred);
271int mac_check_system_swapon(struct ucred *cred, struct vnode *vp);
272int mac_check_system_swapoff(struct ucred *cred, struct vnode *vp);
273int mac_check_system_sysctl(struct ucred *cred, int *name,
274 u_int namelen, void *old, size_t *oldlenp, int inkernel,
275 void *new, size_t newlen);
276int mac_check_vnode_access(struct ucred *cred, struct vnode *vp,
277 int acc_mode);
278int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp);
279int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp);
280int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
281 struct componentname *cnp, struct vattr *vap);
282int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp,
283 struct vnode *vp, struct componentname *cnp);
284int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
285 acl_type_t type);
286int mac_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp,
287 int attrnamespace, const char *name);
288int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp,
289 struct image_params *imgp);
290int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp,
291 acl_type_t type);
292int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
293 int attrnamespace, const char *name, struct uio *uio);
294int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
295 struct vnode *vp, struct componentname *cnp);
296int mac_check_vnode_listextattr(struct ucred *cred, struct vnode *vp,
297 int attrnamespace);
298int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
299 struct componentname *cnp);
300int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
301 int prot);
302int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp,
303 int prot);
304int mac_check_vnode_open(struct ucred *cred, struct vnode *vp,
305 int acc_mode);
306int mac_check_vnode_poll(struct ucred *active_cred,
307 struct ucred *file_cred, struct vnode *vp);
308int mac_check_vnode_read(struct ucred *active_cred,
309 struct ucred *file_cred, struct vnode *vp);
310int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp);
311int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp);
312int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
313 struct vnode *vp, struct componentname *cnp);
314int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
315 struct vnode *vp, int samedir, struct componentname *cnp);
316int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp);
317int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
318 acl_type_t type, struct acl *acl);
319int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
320 int attrnamespace, const char *name, struct uio *uio);
321int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
322 u_long flags);
323int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
324 mode_t mode);
325int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
326 uid_t uid, gid_t gid);
327int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
328 struct timespec atime, struct timespec mtime);
329int mac_check_vnode_stat(struct ucred *active_cred,
330 struct ucred *file_cred, struct vnode *vp);
331int mac_check_vnode_write(struct ucred *active_cred,
332 struct ucred *file_cred, struct vnode *vp);
333int mac_getsockopt_label_get(struct ucred *cred, struct socket *so,
334 struct mac *extmac);
335int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so,
336 struct mac *extmac);
337int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
338 struct ifnet *ifnet);
339int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr,
340 struct ifnet *ifnet);
341int mac_setsockopt_label_set(struct ucred *cred, struct socket *so,
342 struct mac *extmac);
343int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe,
344 struct label *label);
345void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred);
346
347/*
348 * Calls to help various file systems implement labeling functionality
349 * using their existing EA implementation.
350 */
351int vop_stdsetlabel_ea(struct vop_setlabel_args *ap);
352
353#endif /* !_KERNEL */
354
355#endif /* !_SYS_MAC_H */