1 /*-
2 * Copyright (c) 1999-2002, 2007-2009 Robert N. M. Watson
3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
4 * Copyright (c) 2006 SPARTA, Inc.
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * This software was developed for the FreeBSD Project in part by NAI Labs,
10 * the Security Research Division of Network Associates, Inc. under
11 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
12 * CHATS research program.
13 *
14 * This software was enhanced by SPARTA ISSO under SPAWAR contract
15 * N66001-04-C-6019 ("SEFOS").
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * $FreeBSD$
39 */
40
41 /*
42 * Developed by the TrustedBSD Project.
43 *
44 * Low-watermark floating label mandatory integrity policy.
45 */
46
47 #include <sys/types.h>
48 #include <sys/param.h>
49 #include <sys/acl.h>
50 #include <sys/conf.h>
51 #include <sys/extattr.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
54 #include <sys/mman.h>
55 #include <sys/mount.h>
56 #include <sys/priv.h>
57 #include <sys/proc.h>
58 #include <sys/sbuf.h>
59 #include <sys/systm.h>
60 #include <sys/sysproto.h>
61 #include <sys/sysent.h>
62 #include <sys/systm.h>
63 #include <sys/vnode.h>
64 #include <sys/file.h>
65 #include <sys/socket.h>
66 #include <sys/socketvar.h>
67 #include <sys/sx.h>
68 #include <sys/pipe.h>
69 #include <sys/sysctl.h>
70 #include <sys/syslog.h>
71
72 #include <fs/devfs/devfs.h>
73
74 #include <net/bpfdesc.h>
75 #include <net/if.h>
76 #include <net/if_types.h>
77 #include <net/if_var.h>
78
79 #include <netinet/in.h>
80 #include <netinet/in_pcb.h>
81 #include <netinet/ip_var.h>
82
83 #include <vm/vm.h>
84
85 #include <security/mac/mac_policy.h>
86 #include <security/mac/mac_framework.h>
87 #include <security/mac_lomac/mac_lomac.h>
88
89 struct mac_lomac_proc {
90 struct mac_lomac mac_lomac;
91 struct mtx mtx;
92 };
93
94 SYSCTL_DECL(_security_mac);
95
96 static SYSCTL_NODE(_security_mac, OID_AUTO, lomac, CTLFLAG_RW, 0,
97 "TrustedBSD mac_lomac policy controls");
98
99 static int lomac_label_size = sizeof(struct mac_lomac);
100 SYSCTL_INT(_security_mac_lomac, OID_AUTO, label_size, CTLFLAG_RD,
101 &lomac_label_size, 0, "Size of struct mac_lomac");
102
103 static int lomac_enabled = 1;
104 SYSCTL_INT(_security_mac_lomac, OID_AUTO, enabled, CTLFLAG_RWTUN,
105 &lomac_enabled, 0, "Enforce MAC/LOMAC policy");
106
107 static int destroyed_not_inited;
108 SYSCTL_INT(_security_mac_lomac, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
109 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
110
111 static int trust_all_interfaces = 0;
112 SYSCTL_INT(_security_mac_lomac, OID_AUTO, trust_all_interfaces, CTLFLAG_RDTUN,
113 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/LOMAC");
114
115 static char trusted_interfaces[128];
116 SYSCTL_STRING(_security_mac_lomac, OID_AUTO, trusted_interfaces, CTLFLAG_RDTUN,
117 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/LOMAC");
118
119 static int ptys_equal = 0;
120 SYSCTL_INT(_security_mac_lomac, OID_AUTO, ptys_equal, CTLFLAG_RWTUN,
121 &ptys_equal, 0, "Label pty devices as lomac/equal on create");
122
123 static int revocation_enabled = 1;
124 SYSCTL_INT(_security_mac_lomac, OID_AUTO, revocation_enabled, CTLFLAG_RWTUN,
125 &revocation_enabled, 0, "Revoke access to objects on relabel");
126
127 static int lomac_slot;
128 #define SLOT(l) ((struct mac_lomac *)mac_label_get((l), lomac_slot))
129 #define SLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val))
130 #define PSLOT(l) ((struct mac_lomac_proc *) \
131 mac_label_get((l), lomac_slot))
132 #define PSLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val))
133
134 static MALLOC_DEFINE(M_LOMAC, "mac_lomac_label", "MAC/LOMAC labels");
135
136 static struct mac_lomac *
137 lomac_alloc(int flag)
138 {
139 struct mac_lomac *ml;
140
141 ml = malloc(sizeof(*ml), M_LOMAC, M_ZERO | flag);
142
143 return (ml);
144 }
145
146 static void
147 lomac_free(struct mac_lomac *ml)
148 {
149
150 if (ml != NULL)
151 free(ml, M_LOMAC);
152 else
153 atomic_add_int(&destroyed_not_inited, 1);
154 }
155
156 static int
157 lomac_atmostflags(struct mac_lomac *ml, int flags)
158 {
159
160 if ((ml->ml_flags & flags) != ml->ml_flags)
161 return (EINVAL);
162 return (0);
163 }
164
165 static int
166 lomac_dominate_element(struct mac_lomac_element *a,
167 struct mac_lomac_element *b)
168 {
169
170 switch (a->mle_type) {
171 case MAC_LOMAC_TYPE_EQUAL:
172 case MAC_LOMAC_TYPE_HIGH:
173 return (1);
174
175 case MAC_LOMAC_TYPE_LOW:
176 switch (b->mle_type) {
177 case MAC_LOMAC_TYPE_GRADE:
178 case MAC_LOMAC_TYPE_HIGH:
179 return (0);
180
181 case MAC_LOMAC_TYPE_EQUAL:
182 case MAC_LOMAC_TYPE_LOW:
183 return (1);
184
185 default:
186 panic("lomac_dominate_element: b->mle_type invalid");
187 }
188
189 case MAC_LOMAC_TYPE_GRADE:
190 switch (b->mle_type) {
191 case MAC_LOMAC_TYPE_EQUAL:
192 case MAC_LOMAC_TYPE_LOW:
193 return (1);
194
195 case MAC_LOMAC_TYPE_HIGH:
196 return (0);
197
198 case MAC_LOMAC_TYPE_GRADE:
199 return (a->mle_grade >= b->mle_grade);
200
201 default:
202 panic("lomac_dominate_element: b->mle_type invalid");
203 }
204
205 default:
206 panic("lomac_dominate_element: a->mle_type invalid");
207 }
208 }
209
210 static int
211 lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
212 {
213
214 return (lomac_dominate_element(&rangeb->ml_rangehigh,
215 &rangea->ml_rangehigh) &&
216 lomac_dominate_element(&rangea->ml_rangelow,
217 &rangeb->ml_rangelow));
218 }
219
220 static int
221 lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
222 {
223
224 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
225 ("lomac_single_in_range: a not single"));
226 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
227 ("lomac_single_in_range: b not range"));
228
229 return (lomac_dominate_element(&range->ml_rangehigh,
230 &single->ml_single) && lomac_dominate_element(&single->ml_single,
231 &range->ml_rangelow));
232 }
233
234 static int
235 lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
236 {
237
238 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
239 ("lomac_single_in_range: a not auxsingle"));
240 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
241 ("lomac_single_in_range: b not range"));
242
243 return (lomac_dominate_element(&range->ml_rangehigh,
244 &single->ml_auxsingle) &&
245 lomac_dominate_element(&single->ml_auxsingle,
246 &range->ml_rangelow));
247 }
248
249 static int
250 lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
251 {
252 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
253 ("lomac_dominate_single: a not single"));
254 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
255 ("lomac_dominate_single: b not single"));
256
257 return (lomac_dominate_element(&a->ml_single, &b->ml_single));
258 }
259
260 static int
261 lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
262 {
263 KASSERT((~a->ml_flags &
264 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
265 ("lomac_dominate_single: a not subject"));
266 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
267 ("lomac_dominate_single: b not single"));
268
269 return (lomac_dominate_element(&a->ml_rangehigh, &b->ml_single));
270 }
271
272 static int
273 lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
274 {
275
276 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
277 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
278 return (1);
279
280 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
281 }
282
283 static int
284 lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
285 {
286
287 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
288 ("lomac_equal_single: a not single"));
289 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
290 ("lomac_equal_single: b not single"));
291
292 return (lomac_equal_element(&a->ml_single, &b->ml_single));
293 }
294
295 static int
296 lomac_contains_equal(struct mac_lomac *ml)
297 {
298
299 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE)
300 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
301 return (1);
302 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX)
303 if (ml->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
304 return (1);
305
306 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
307 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
308 return (1);
309 if (ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
310 return (1);
311 }
312
313 return (0);
314 }
315
316 static int
317 lomac_subject_privileged(struct mac_lomac *ml)
318 {
319
320 KASSERT((ml->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
321 MAC_LOMAC_FLAGS_BOTH,
322 ("lomac_subject_privileged: subject doesn't have both labels"));
323
324 /* If the single is EQUAL, it's ok. */
325 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
326 return (0);
327
328 /* If either range endpoint is EQUAL, it's ok. */
329 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
330 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
331 return (0);
332
333 /* If the range is low-high, it's ok. */
334 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
335 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
336 return (0);
337
338 /* It's not ok. */
339 return (EPERM);
340 }
341
342 static int
343 lomac_high_single(struct mac_lomac *ml)
344 {
345
346 KASSERT((ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
347 ("lomac_high_single: mac_lomac not single"));
348
349 return (ml->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
350 }
351
352 static int
353 lomac_valid(struct mac_lomac *ml)
354 {
355
356 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
357 switch (ml->ml_single.mle_type) {
358 case MAC_LOMAC_TYPE_GRADE:
359 case MAC_LOMAC_TYPE_EQUAL:
360 case MAC_LOMAC_TYPE_HIGH:
361 case MAC_LOMAC_TYPE_LOW:
362 break;
363
364 default:
365 return (EINVAL);
366 }
367 } else {
368 if (ml->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
369 return (EINVAL);
370 }
371
372 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
373 switch (ml->ml_auxsingle.mle_type) {
374 case MAC_LOMAC_TYPE_GRADE:
375 case MAC_LOMAC_TYPE_EQUAL:
376 case MAC_LOMAC_TYPE_HIGH:
377 case MAC_LOMAC_TYPE_LOW:
378 break;
379
380 default:
381 return (EINVAL);
382 }
383 } else {
384 if (ml->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
385 return (EINVAL);
386 }
387
388 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
389 switch (ml->ml_rangelow.mle_type) {
390 case MAC_LOMAC_TYPE_GRADE:
391 case MAC_LOMAC_TYPE_EQUAL:
392 case MAC_LOMAC_TYPE_HIGH:
393 case MAC_LOMAC_TYPE_LOW:
394 break;
395
396 default:
397 return (EINVAL);
398 }
399
400 switch (ml->ml_rangehigh.mle_type) {
401 case MAC_LOMAC_TYPE_GRADE:
402 case MAC_LOMAC_TYPE_EQUAL:
403 case MAC_LOMAC_TYPE_HIGH:
404 case MAC_LOMAC_TYPE_LOW:
405 break;
406
407 default:
408 return (EINVAL);
409 }
410 if (!lomac_dominate_element(&ml->ml_rangehigh,
411 &ml->ml_rangelow))
412 return (EINVAL);
413 } else {
414 if (ml->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
415 ml->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
416 return (EINVAL);
417 }
418
419 return (0);
420 }
421
422 static void
423 lomac_set_range(struct mac_lomac *ml, u_short typelow, u_short gradelow,
424 u_short typehigh, u_short gradehigh)
425 {
426
427 ml->ml_rangelow.mle_type = typelow;
428 ml->ml_rangelow.mle_grade = gradelow;
429 ml->ml_rangehigh.mle_type = typehigh;
430 ml->ml_rangehigh.mle_grade = gradehigh;
431 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
432 }
433
434 static void
435 lomac_set_single(struct mac_lomac *ml, u_short type, u_short grade)
436 {
437
438 ml->ml_single.mle_type = type;
439 ml->ml_single.mle_grade = grade;
440 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
441 }
442
443 static void
444 lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
445 {
446
447 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
448 ("lomac_copy_range: labelfrom not range"));
449
450 labelto->ml_rangelow = labelfrom->ml_rangelow;
451 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
452 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
453 }
454
455 static void
456 lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
457 {
458
459 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
460 ("lomac_copy_single: labelfrom not single"));
461
462 labelto->ml_single = labelfrom->ml_single;
463 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
464 }
465
466 static void
467 lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
468 {
469
470 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
471 ("lomac_copy_auxsingle: labelfrom not auxsingle"));
472
473 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
474 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
475 }
476
477 static void
478 lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
479 {
480
481 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
482 lomac_copy_single(source, dest);
483 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
484 lomac_copy_auxsingle(source, dest);
485 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
486 lomac_copy_range(source, dest);
487 }
488
489 static int lomac_to_string(struct sbuf *sb, struct mac_lomac *ml);
490
491 static int
492 maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
493 const char *actionname, const char *objname, struct vnode *vp)
494 {
495 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
496 char *subjlabeltext, *objlabeltext, *subjtext;
497 struct mac_lomac cached_subjlabel;
498 struct mac_lomac_proc *subj;
499 struct vattr va;
500 struct proc *p;
501 pid_t pgid;
502
503 subj = PSLOT(curthread->td_proc->p_label);
504
505 p = curthread->td_proc;
506 mtx_lock(&subj->mtx);
507 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
508 /*
509 * Check to see if the pending demotion would be more or less
510 * severe than this one, and keep the more severe. This can
511 * only happen for a multi-threaded application.
512 */
513 if (lomac_dominate_single(objlabel, &subj->mac_lomac)) {
514 mtx_unlock(&subj->mtx);
515 return (0);
516 }
517 }
518 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
519 /*
520 * Always demote the single label.
521 */
522 lomac_copy_single(objlabel, &subj->mac_lomac);
523 /*
524 * Start with the original range, then minimize each side of the
525 * range to the point of not dominating the object. The high side
526 * will always be demoted, of course.
527 */
528 lomac_copy_range(subjlabel, &subj->mac_lomac);
529 if (!lomac_dominate_element(&objlabel->ml_single,
530 &subj->mac_lomac.ml_rangelow))
531 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
532 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
533 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
534 thread_lock(curthread);
535 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND;
536 thread_unlock(curthread);
537
538 /*
539 * Avoid memory allocation while holding a mutex; cache the label.
540 */
541 lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
542 mtx_unlock(&subj->mtx);
543
544 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
545 lomac_to_string(&subjlabel_sb, subjlabel);
546 sbuf_finish(&subjlabel_sb);
547 subjlabeltext = sbuf_data(&subjlabel_sb);
548
549 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
550 lomac_to_string(&subjtext_sb, &subj->mac_lomac);
551 sbuf_finish(&subjtext_sb);
552 subjtext = sbuf_data(&subjtext_sb);
553
554 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
555 lomac_to_string(&objlabel_sb, objlabel);
556 sbuf_finish(&objlabel_sb);
557 objlabeltext = sbuf_data(&objlabel_sb);
558
559 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
560 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred) == 0) {
561 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
562 " level %s after %s a level-%s %s (inode=%ju, "
563 "mountpount=%s)\n",
564 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
565 p->p_comm, subjtext, actionname, objlabeltext, objname,
566 (uintmax_t)va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
567 } else {
568 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
569 " level %s after %s a level-%s %s\n",
570 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
571 p->p_comm, subjtext, actionname, objlabeltext, objname);
572 }
573
574 sbuf_delete(&subjlabel_sb);
575 sbuf_delete(&subjtext_sb);
576 sbuf_delete(&objlabel_sb);
577
578 return (0);
579 }
580
581 /*
582 * Relabel "to" to "from" only if "from" is a valid label (contains at least
583 * a single), as for a relabel operation which may or may not involve a
584 * relevant label.
585 */
586 static void
587 try_relabel(struct mac_lomac *from, struct mac_lomac *to)
588 {
589
590 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
591 bzero(to, sizeof(*to));
592 lomac_copy(from, to);
593 }
594 }
595
596 /*
597 * Policy module operations.
598 */
599 static void
600 lomac_init(struct mac_policy_conf *conf)
601 {
602
603 }
604
605 /*
606 * Label operations.
607 */
608 static void
609 lomac_init_label(struct label *label)
610 {
611
612 SLOT_SET(label, lomac_alloc(M_WAITOK));
613 }
614
615 static int
616 lomac_init_label_waitcheck(struct label *label, int flag)
617 {
618
619 SLOT_SET(label, lomac_alloc(flag));
620 if (SLOT(label) == NULL)
621 return (ENOMEM);
622
623 return (0);
624 }
625
626 static void
627 lomac_destroy_label(struct label *label)
628 {
629
630 lomac_free(SLOT(label));
631 SLOT_SET(label, NULL);
632 }
633
634 static int
635 lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
636 {
637
638 switch (element->mle_type) {
639 case MAC_LOMAC_TYPE_HIGH:
640 return (sbuf_printf(sb, "high"));
641
642 case MAC_LOMAC_TYPE_LOW:
643 return (sbuf_printf(sb, "low"));
644
645 case MAC_LOMAC_TYPE_EQUAL:
646 return (sbuf_printf(sb, "equal"));
647
648 case MAC_LOMAC_TYPE_GRADE:
649 return (sbuf_printf(sb, "%d", element->mle_grade));
650
651 default:
652 panic("lomac_element_to_string: invalid type (%d)",
653 element->mle_type);
654 }
655 }
656
657 static int
658 lomac_to_string(struct sbuf *sb, struct mac_lomac *ml)
659 {
660
661 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
662 if (lomac_element_to_string(sb, &ml->ml_single) == -1)
663 return (EINVAL);
664 }
665
666 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
667 if (sbuf_putc(sb, '[') == -1)
668 return (EINVAL);
669
670 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1)
671 return (EINVAL);
672
673 if (sbuf_putc(sb, ']') == -1)
674 return (EINVAL);
675 }
676
677 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
678 if (sbuf_putc(sb, '(') == -1)
679 return (EINVAL);
680
681 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1)
682 return (EINVAL);
683
684 if (sbuf_putc(sb, '-') == -1)
685 return (EINVAL);
686
687 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1)
688 return (EINVAL);
689
690 if (sbuf_putc(sb, ')') == -1)
691 return (EINVAL);
692 }
693
694 return (0);
695 }
696
697 static int
698 lomac_externalize_label(struct label *label, char *element_name,
699 struct sbuf *sb, int *claimed)
700 {
701 struct mac_lomac *ml;
702
703 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
704 return (0);
705
706 (*claimed)++;
707
708 ml = SLOT(label);
709
710 return (lomac_to_string(sb, ml));
711 }
712
713 static int
714 lomac_parse_element(struct mac_lomac_element *element, char *string)
715 {
716
717 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
718 element->mle_type = MAC_LOMAC_TYPE_HIGH;
719 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
720 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
721 element->mle_type = MAC_LOMAC_TYPE_LOW;
722 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
723 } else if (strcmp(string, "equal") == 0 ||
724 strcmp(string, "eq") == 0) {
725 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
726 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
727 } else {
728 char *p0, *p1;
729 int d;
730
731 p0 = string;
732 d = strtol(p0, &p1, 10);
733
734 if (d < 0 || d > 65535)
735 return (EINVAL);
736 element->mle_type = MAC_LOMAC_TYPE_GRADE;
737 element->mle_grade = d;
738
739 if (p1 == p0 || *p1 != '\0')
740 return (EINVAL);
741 }
742
743 return (0);
744 }
745
746 /*
747 * Note: destructively consumes the string, make a local copy before calling
748 * if that's a problem.
749 */
750 static int
751 lomac_parse(struct mac_lomac *ml, char *string)
752 {
753 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
754 *auxsingleend;
755 int error;
756
757 /* Do we have a range? */
758 single = string;
759 range = strchr(string, '(');
760 if (range == single)
761 single = NULL;
762 auxsingle = strchr(string, '[');
763 if (auxsingle == single)
764 single = NULL;
765 if (range != NULL && auxsingle != NULL)
766 return (EINVAL);
767 rangelow = rangehigh = NULL;
768 if (range != NULL) {
769 /* Nul terminate the end of the single string. */
770 *range = '\0';
771 range++;
772 rangelow = range;
773 rangehigh = strchr(rangelow, '-');
774 if (rangehigh == NULL)
775 return (EINVAL);
776 rangehigh++;
777 if (*rangelow == '\0' || *rangehigh == '\0')
778 return (EINVAL);
779 rangeend = strchr(rangehigh, ')');
780 if (rangeend == NULL)
781 return (EINVAL);
782 if (*(rangeend + 1) != '\0')
783 return (EINVAL);
784 /* Nul terminate the ends of the ranges. */
785 *(rangehigh - 1) = '\0';
786 *rangeend = '\0';
787 }
788 KASSERT((rangelow != NULL && rangehigh != NULL) ||
789 (rangelow == NULL && rangehigh == NULL),
790 ("lomac_internalize_label: range mismatch"));
791 if (auxsingle != NULL) {
792 /* Nul terminate the end of the single string. */
793 *auxsingle = '\0';
794 auxsingle++;
795 auxsingleend = strchr(auxsingle, ']');
796 if (auxsingleend == NULL)
797 return (EINVAL);
798 if (*(auxsingleend + 1) != '\0')
799 return (EINVAL);
800 /* Nul terminate the end of the auxsingle. */
801 *auxsingleend = '\0';
802 }
803
804 bzero(ml, sizeof(*ml));
805 if (single != NULL) {
806 error = lomac_parse_element(&ml->ml_single, single);
807 if (error)
808 return (error);
809 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
810 }
811
812 if (auxsingle != NULL) {
813 error = lomac_parse_element(&ml->ml_auxsingle, auxsingle);
814 if (error)
815 return (error);
816 ml->ml_flags |= MAC_LOMAC_FLAG_AUX;
817 }
818
819 if (rangelow != NULL) {
820 error = lomac_parse_element(&ml->ml_rangelow, rangelow);
821 if (error)
822 return (error);
823 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh);
824 if (error)
825 return (error);
826 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
827 }
828
829 error = lomac_valid(ml);
830 if (error)
831 return (error);
832
833 return (0);
834 }
835
836 static int
837 lomac_internalize_label(struct label *label, char *element_name,
838 char *element_data, int *claimed)
839 {
840 struct mac_lomac *ml, ml_temp;
841 int error;
842
843 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
844 return (0);
845
846 (*claimed)++;
847
848 error = lomac_parse(&ml_temp, element_data);
849 if (error)
850 return (error);
851
852 ml = SLOT(label);
853 *ml = ml_temp;
854
855 return (0);
856 }
857
858 static void
859 lomac_copy_label(struct label *src, struct label *dest)
860 {
861
862 *SLOT(dest) = *SLOT(src);
863 }
864
865 /*
866 * Object-specific entry point implementations are sorted alphabetically by
867 * object type name and then by operation.
868 */
869 static int
870 lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
871 struct ifnet *ifp, struct label *ifplabel)
872 {
873 struct mac_lomac *a, *b;
874
875 if (!lomac_enabled)
876 return (0);
877
878 a = SLOT(dlabel);
879 b = SLOT(ifplabel);
880
881 if (lomac_equal_single(a, b))
882 return (0);
883 return (EACCES);
884 }
885
886 static void
887 lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
888 struct label *dlabel)
889 {
890 struct mac_lomac *source, *dest;
891
892 source = SLOT(cred->cr_label);
893 dest = SLOT(dlabel);
894
895 lomac_copy_single(source, dest);
896 }
897
898 static void
899 lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
900 struct mbuf *m, struct label *mlabel)
901 {
902 struct mac_lomac *source, *dest;
903
904 source = SLOT(dlabel);
905 dest = SLOT(mlabel);
906
907 lomac_copy_single(source, dest);
908 }
909
910 static int
911 lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
912 {
913 struct mac_lomac *subj, *new;
914 int error;
915
916 subj = SLOT(cred->cr_label);
917 new = SLOT(newlabel);
918
919 /*
920 * If there is a LOMAC label update for the credential, it may be an
921 * update of the single, range, or both.
922 */
923 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
924 if (error)
925 return (error);
926
927 /*
928 * If the LOMAC label is to be changed, authorize as appropriate.
929 */
930 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
931 /*
932 * Fill in the missing parts from the previous label.
933 */
934 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
935 lomac_copy_single(subj, new);
936 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
937 lomac_copy_range(subj, new);
938
939 /*
940 * To change the LOMAC range on a credential, the new range
941 * label must be in the current range.
942 */
943 if (!lomac_range_in_range(new, subj))
944 return (EPERM);
945
946 /*
947 * To change the LOMAC single label on a credential, the new
948 * single label must be in the new range. Implicitly from
949 * the previous check, the new single is in the old range.
950 */
951 if (!lomac_single_in_range(new, new))
952 return (EPERM);
953
954 /*
955 * To have EQUAL in any component of the new credential LOMAC
956 * label, the subject must already have EQUAL in their label.
957 */
958 if (lomac_contains_equal(new)) {
959 error = lomac_subject_privileged(subj);
960 if (error)
961 return (error);
962 }
963
964 /*
965 * XXXMAC: Additional consistency tests regarding the single
966 * and range of the new label might be performed here.
967 */
968 }
969
970 return (0);
971 }
972
973 static int
974 lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
975 {
976 struct mac_lomac *subj, *obj;
977
978 if (!lomac_enabled)
979 return (0);
980
981 subj = SLOT(cr1->cr_label);
982 obj = SLOT(cr2->cr_label);
983
984 /* XXX: range */
985 if (!lomac_dominate_single(obj, subj))
986 return (ESRCH);
987
988 return (0);
989 }
990
991 static void
992 lomac_cred_create_init(struct ucred *cred)
993 {
994 struct mac_lomac *dest;
995
996 dest = SLOT(cred->cr_label);
997
998 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
999 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1000 }
1001
1002 static void
1003 lomac_cred_create_swapper(struct ucred *cred)
1004 {
1005 struct mac_lomac *dest;
1006
1007 dest = SLOT(cred->cr_label);
1008
1009 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1010 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1011 }
1012
1013 static void
1014 lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
1015 {
1016 struct mac_lomac *source, *dest;
1017
1018 source = SLOT(newlabel);
1019 dest = SLOT(cred->cr_label);
1020
1021 try_relabel(source, dest);
1022 }
1023
1024 static void
1025 lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
1026 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
1027 {
1028 struct mac_lomac *ml;
1029 const char *dn;
1030 int lomac_type;
1031
1032 ml = SLOT(delabel);
1033 dn = devtoname(dev);
1034 if (strcmp(dn, "null") == 0 ||
1035 strcmp(dn, "zero") == 0 ||
1036 strcmp(dn, "random") == 0 ||
1037 strncmp(dn, "fd/", strlen("fd/")) == 0 ||
1038 strncmp(dn, "ttyv", strlen("ttyv")) == 0)
1039 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1040 else if (ptys_equal &&
1041 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
1042 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
1043 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
1044 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1045 else
1046 lomac_type = MAC_LOMAC_TYPE_HIGH;
1047 lomac_set_single(ml, lomac_type, 0);
1048 }
1049
1050 static void
1051 lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
1052 struct devfs_dirent *de, struct label *delabel)
1053 {
1054 struct mac_lomac *ml;
1055
1056 ml = SLOT(delabel);
1057 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
1058 }
1059
1060 static void
1061 lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
1062 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
1063 struct label *delabel)
1064 {
1065 struct mac_lomac *source, *dest;
1066
1067 source = SLOT(cred->cr_label);
1068 dest = SLOT(delabel);
1069
1070 lomac_copy_single(source, dest);
1071 }
1072
1073 static void
1074 lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
1075 struct label *delabel, struct vnode *vp, struct label *vplabel)
1076 {
1077 struct mac_lomac *source, *dest;
1078
1079 source = SLOT(vplabel);
1080 dest = SLOT(delabel);
1081
1082 lomac_copy(source, dest);
1083 }
1084
1085 static void
1086 lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
1087 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1088 struct label *vplabel)
1089 {
1090 struct mac_lomac *source, *dest;
1091
1092 source = SLOT(delabel);
1093 dest = SLOT(vplabel);
1094
1095 lomac_copy_single(source, dest);
1096 }
1097
1098 static int
1099 lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1100 struct label *ifplabel, struct label *newlabel)
1101 {
1102 struct mac_lomac *subj, *new;
1103 int error;
1104
1105 subj = SLOT(cred->cr_label);
1106 new = SLOT(newlabel);
1107
1108 /*
1109 * If there is a LOMAC label update for the interface, it may be an
1110 * update of the single, range, or both.
1111 */
1112 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1113 if (error)
1114 return (error);
1115
1116 /*
1117 * Relabling network interfaces requires LOMAC privilege.
1118 */
1119 error = lomac_subject_privileged(subj);
1120 if (error)
1121 return (error);
1122
1123 /*
1124 * If the LOMAC label is to be changed, authorize as appropriate.
1125 */
1126 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1127 /*
1128 * Fill in the missing parts from the previous label.
1129 */
1130 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1131 lomac_copy_single(subj, new);
1132 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1133 lomac_copy_range(subj, new);
1134
1135 /*
1136 * Rely on the traditional superuser status for the LOMAC
1137 * interface relabel requirements. XXXMAC: This will go
1138 * away.
1139 *
1140 * XXXRW: This is also redundant to a higher layer check.
1141 */
1142 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
1143 if (error)
1144 return (EPERM);
1145
1146 /*
1147 * XXXMAC: Additional consistency tests regarding the single
1148 * and the range of the new label might be performed here.
1149 */
1150 }
1151
1152 return (0);
1153 }
1154
1155 static int
1156 lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1157 struct mbuf *m, struct label *mlabel)
1158 {
1159 struct mac_lomac *p, *i;
1160
1161 if (!lomac_enabled)
1162 return (0);
1163
1164 p = SLOT(mlabel);
1165 i = SLOT(ifplabel);
1166
1167 return (lomac_single_in_range(p, i) ? 0 : EACCES);
1168 }
1169
1170 static void
1171 lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1172 {
1173 char tifname[IFNAMSIZ], *p, *q;
1174 char tiflist[sizeof(trusted_interfaces)];
1175 struct mac_lomac *dest;
1176 int len, grade;
1177
1178 dest = SLOT(ifplabel);
1179
1180 if (ifp->if_type == IFT_LOOP) {
1181 grade = MAC_LOMAC_TYPE_EQUAL;
1182 goto set;
1183 }
1184
1185 if (trust_all_interfaces) {
1186 grade = MAC_LOMAC_TYPE_HIGH;
1187 goto set;
1188 }
1189
1190 grade = MAC_LOMAC_TYPE_LOW;
1191
1192 if (trusted_interfaces[0] == '\0' ||
1193 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1194 goto set;
1195
1196 bzero(tiflist, sizeof(tiflist));
1197 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1198 if(*p != ' ' && *p != '\t')
1199 *q = *p;
1200
1201 for (p = q = tiflist;; p++) {
1202 if (*p == ',' || *p == '\0') {
1203 len = p - q;
1204 if (len < IFNAMSIZ) {
1205 bzero(tifname, sizeof(tifname));
1206 bcopy(q, tifname, len);
1207 if (strcmp(tifname, ifp->if_xname) == 0) {
1208 grade = MAC_LOMAC_TYPE_HIGH;
1209 break;
1210 }
1211 }
1212 else {
1213 *p = '\0';
1214 printf("MAC/LOMAC warning: interface name "
1215 "\"%s\" is too long (must be < %d)\n",
1216 q, IFNAMSIZ);
1217 }
1218 if (*p == '\0')
1219 break;
1220 q = p + 1;
1221 }
1222 }
1223 set:
1224 lomac_set_single(dest, grade, 0);
1225 lomac_set_range(dest, grade, 0, grade, 0);
1226 }
1227
1228 static void
1229 lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1230 struct mbuf *m, struct label *mlabel)
1231 {
1232 struct mac_lomac *source, *dest;
1233
1234 source = SLOT(ifplabel);
1235 dest = SLOT(mlabel);
1236
1237 lomac_copy_single(source, dest);
1238 }
1239
1240 static void
1241 lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1242 struct label *ifplabel, struct label *newlabel)
1243 {
1244 struct mac_lomac *source, *dest;
1245
1246 source = SLOT(newlabel);
1247 dest = SLOT(ifplabel);
1248
1249 try_relabel(source, dest);
1250 }
1251
1252 static int
1253 lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1254 struct mbuf *m, struct label *mlabel)
1255 {
1256 struct mac_lomac *p, *i;
1257
1258 if (!lomac_enabled)
1259 return (0);
1260
1261 p = SLOT(mlabel);
1262 i = SLOT(inplabel);
1263
1264 return (lomac_equal_single(p, i) ? 0 : EACCES);
1265 }
1266
1267 static int
1268 lomac_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1269 struct label *inplabel)
1270 {
1271 struct mac_lomac *subj, *obj;
1272
1273 if (!lomac_enabled)
1274 return (0);
1275
1276 subj = SLOT(cred->cr_label);
1277 obj = SLOT(inplabel);
1278
1279 if (!lomac_dominate_single(obj, subj))
1280 return (ENOENT);
1281
1282 return (0);
1283 }
1284
1285 static void
1286 lomac_inpcb_create(struct socket *so, struct label *solabel,
1287 struct inpcb *inp, struct label *inplabel)
1288 {
1289 struct mac_lomac *source, *dest;
1290
1291 source = SLOT(solabel);
1292 dest = SLOT(inplabel);
1293
1294 lomac_copy_single(source, dest);
1295 }
1296
1297 static void
1298 lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1299 struct mbuf *m, struct label *mlabel)
1300 {
1301 struct mac_lomac *source, *dest;
1302
1303 source = SLOT(inplabel);
1304 dest = SLOT(mlabel);
1305
1306 lomac_copy_single(source, dest);
1307 }
1308
1309 static void
1310 lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1311 struct inpcb *inp, struct label *inplabel)
1312 {
1313 struct mac_lomac *source, *dest;
1314
1315 SOCK_LOCK_ASSERT(so);
1316
1317 source = SLOT(solabel);
1318 dest = SLOT(inplabel);
1319
1320 lomac_copy_single(source, dest);
1321 }
1322
1323 static void
1324 lomac_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1325 struct label *q6label)
1326 {
1327 struct mac_lomac *source, *dest;
1328
1329 source = SLOT(mlabel);
1330 dest = SLOT(q6label);
1331
1332 lomac_copy_single(source, dest);
1333 }
1334
1335 static int
1336 lomac_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1337 struct label *q6label)
1338 {
1339 struct mac_lomac *a, *b;
1340
1341 a = SLOT(q6label);
1342 b = SLOT(mlabel);
1343
1344 return (lomac_equal_single(a, b));
1345 }
1346
1347 static void
1348 lomac_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1349 struct label *mlabel)
1350 {
1351 struct mac_lomac *source, *dest;
1352
1353 source = SLOT(q6label);
1354 dest = SLOT(mlabel);
1355
1356 /* Just use the head, since we require them all to match. */
1357 lomac_copy_single(source, dest);
1358 }
1359
1360 static void
1361 lomac_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1362 struct label *q6label)
1363 {
1364
1365 /* NOOP: we only accept matching labels, so no need to update */
1366 }
1367
1368 static void
1369 lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1370 struct label *qlabel)
1371 {
1372 struct mac_lomac *source, *dest;
1373
1374 source = SLOT(mlabel);
1375 dest = SLOT(qlabel);
1376
1377 lomac_copy_single(source, dest);
1378 }
1379
1380 static int
1381 lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1382 struct label *qlabel)
1383 {
1384 struct mac_lomac *a, *b;
1385
1386 a = SLOT(qlabel);
1387 b = SLOT(mlabel);
1388
1389 return (lomac_equal_single(a, b));
1390 }
1391
1392 static void
1393 lomac_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1394 struct label *mlabel)
1395 {
1396 struct mac_lomac *source, *dest;
1397
1398 source = SLOT(qlabel);
1399 dest = SLOT(mlabel);
1400
1401 /* Just use the head, since we require them all to match. */
1402 lomac_copy_single(source, dest);
1403 }
1404
1405 static void
1406 lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1407 struct label *qlabel)
1408 {
1409
1410 /* NOOP: we only accept matching labels, so no need to update */
1411 }
1412
1413 static int
1414 lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
1415 struct label *vplabel)
1416 {
1417 struct mac_lomac *subj, *obj;
1418
1419 if (!lomac_enabled)
1420 return (0);
1421
1422 subj = SLOT(cred->cr_label);
1423 obj = SLOT(vplabel);
1424
1425 if (lomac_subject_privileged(subj))
1426 return (EPERM);
1427
1428 if (!lomac_high_single(obj))
1429 return (EACCES);
1430
1431 return (0);
1432 }
1433
1434 static void
1435 lomac_mount_create(struct ucred *cred, struct mount *mp,
1436 struct label *mplabel)
1437 {
1438 struct mac_lomac *source, *dest;
1439
1440 source = SLOT(cred->cr_label);
1441 dest = SLOT(mplabel);
1442 lomac_copy_single(source, dest);
1443 }
1444
1445 static void
1446 lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1447 struct mbuf *m, struct label *mlabel)
1448 {
1449 struct mac_lomac *dest;
1450
1451 dest = SLOT(mlabel);
1452
1453 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1454 }
1455
1456 static void
1457 lomac_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1458 struct mbuf *msend, struct label *msendlabel)
1459 {
1460 struct mac_lomac *source, *dest;
1461
1462 source = SLOT(mrecvlabel);
1463 dest = SLOT(msendlabel);
1464
1465 lomac_copy_single(source, dest);
1466 }
1467
1468 static void
1469 lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1470 {
1471 struct mac_lomac *dest;
1472
1473 dest = SLOT(mlabel);
1474
1475 /* XXX: where is the label for the firewall really coming from? */
1476 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1477 }
1478
1479 static void
1480 lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
1481 struct mbuf *frag, struct label *fraglabel)
1482 {
1483 struct mac_lomac *source, *dest;
1484
1485 source = SLOT(mlabel);
1486 dest = SLOT(fraglabel);
1487
1488 lomac_copy_single(source, dest);
1489 }
1490
1491 static void
1492 lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1493 struct mbuf *msend, struct label *msendlabel)
1494 {
1495 struct mac_lomac *source, *dest;
1496
1497 source = SLOT(mrecvlabel);
1498 dest = SLOT(msendlabel);
1499
1500 lomac_copy_single(source, dest);
1501 }
1502
1503 static void
1504 lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1505 struct mbuf *m, struct label *mlabel)
1506 {
1507 struct mac_lomac *dest;
1508
1509 dest = SLOT(mlabel);
1510
1511 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1512 }
1513
1514 static void
1515 lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1516 struct mbuf *m, struct label *mlabel)
1517 {
1518 struct mac_lomac *dest;
1519
1520 dest = SLOT(mlabel);
1521
1522 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1523 }
1524
1525 static int
1526 lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1527 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1528 {
1529
1530 if (!lomac_enabled)
1531 return (0);
1532
1533 /* XXX: This will be implemented soon... */
1534
1535 return (0);
1536 }
1537
1538 static int
1539 lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1540 struct label *pplabel)
1541 {
1542 struct mac_lomac *subj, *obj;
1543
1544 if (!lomac_enabled)
1545 return (0);
1546
1547 subj = SLOT(cred->cr_label);
1548 obj = SLOT(pplabel);
1549
1550 if (!lomac_dominate_single(obj, subj))
1551 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1552
1553 return (0);
1554 }
1555
1556 static int
1557 lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1558 struct label *pplabel, struct label *newlabel)
1559 {
1560 struct mac_lomac *subj, *obj, *new;
1561 int error;
1562
1563 new = SLOT(newlabel);
1564 subj = SLOT(cred->cr_label);
1565 obj = SLOT(pplabel);
1566
1567 /*
1568 * If there is a LOMAC label update for a pipe, it must be a single
1569 * update.
1570 */
1571 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1572 if (error)
1573 return (error);
1574
1575 /*
1576 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1577 * authorize the relabel.
1578 */
1579 if (!lomac_single_in_range(obj, subj))
1580 return (EPERM);
1581
1582 /*
1583 * If the LOMAC label is to be changed, authorize as appropriate.
1584 */
1585 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1586 /*
1587 * To change the LOMAC label on a pipe, the new pipe label
1588 * must be in the subject range.
1589 */
1590 if (!lomac_single_in_range(new, subj))
1591 return (EPERM);
1592
1593 /*
1594 * To change the LOMAC label on a pipe to be EQUAL, the
1595 * subject must have appropriate privilege.
1596 */
1597 if (lomac_contains_equal(new)) {
1598 error = lomac_subject_privileged(subj);
1599 if (error)
1600 return (error);
1601 }
1602 }
1603
1604 return (0);
1605 }
1606
1607 static int
1608 lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1609 struct label *pplabel)
1610 {
1611 struct mac_lomac *subj, *obj;
1612
1613 if (!lomac_enabled)
1614 return (0);
1615
1616 subj = SLOT(cred->cr_label);
1617 obj = SLOT(pplabel);
1618
1619 if (!lomac_subject_dominate(subj, obj))
1620 return (EACCES);
1621
1622 return (0);
1623 }
1624
1625 static void
1626 lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
1627 struct label *pplabel)
1628 {
1629 struct mac_lomac *source, *dest;
1630
1631 source = SLOT(cred->cr_label);
1632 dest = SLOT(pplabel);
1633
1634 lomac_copy_single(source, dest);
1635 }
1636
1637 static void
1638 lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1639 struct label *pplabel, struct label *newlabel)
1640 {
1641 struct mac_lomac *source, *dest;
1642
1643 source = SLOT(newlabel);
1644 dest = SLOT(pplabel);
1645
1646 try_relabel(source, dest);
1647 }
1648
1649 /*
1650 * Some system privileges are allowed regardless of integrity grade; others
1651 * are allowed only when running with privilege with respect to the LOMAC
1652 * policy as they might otherwise allow bypassing of the integrity policy.
1653 */
1654 static int
1655 lomac_priv_check(struct ucred *cred, int priv)
1656 {
1657 struct mac_lomac *subj;
1658 int error;
1659
1660 if (!lomac_enabled)
1661 return (0);
1662
1663 /*
1664 * Exempt only specific privileges from the LOMAC integrity policy.
1665 */
1666 switch (priv) {
1667 case PRIV_KTRACE:
1668 case PRIV_MSGBUF:
1669
1670 /*
1671 * Allow processes to manipulate basic process audit properties, and
1672 * to submit audit records.
1673 */
1674 case PRIV_AUDIT_GETAUDIT:
1675 case PRIV_AUDIT_SETAUDIT:
1676 case PRIV_AUDIT_SUBMIT:
1677
1678 /*
1679 * Allow processes to manipulate their regular UNIX credentials.
1680 */
1681 case PRIV_CRED_SETUID:
1682 case PRIV_CRED_SETEUID:
1683 case PRIV_CRED_SETGID:
1684 case PRIV_CRED_SETEGID:
1685 case PRIV_CRED_SETGROUPS:
1686 case PRIV_CRED_SETREUID:
1687 case PRIV_CRED_SETREGID:
1688 case PRIV_CRED_SETRESUID:
1689 case PRIV_CRED_SETRESGID:
1690
1691 /*
1692 * Allow processes to perform system monitoring.
1693 */
1694 case PRIV_SEEOTHERGIDS:
1695 case PRIV_SEEOTHERUIDS:
1696 break;
1697
1698 /*
1699 * Allow access to general process debugging facilities. We
1700 * separately control debugging based on MAC label.
1701 */
1702 case PRIV_DEBUG_DIFFCRED:
1703 case PRIV_DEBUG_SUGID:
1704 case PRIV_DEBUG_UNPRIV:
1705
1706 /*
1707 * Allow manipulating jails.
1708 */
1709 case PRIV_JAIL_ATTACH:
1710
1711 /*
1712 * Allow privilege with respect to the Partition policy, but not the
1713 * Privs policy.
1714 */
1715 case PRIV_MAC_PARTITION:
1716
1717 /*
1718 * Allow privilege with respect to process resource limits and login
1719 * context.
1720 */
1721 case PRIV_PROC_LIMIT:
1722 case PRIV_PROC_SETLOGIN:
1723 case PRIV_PROC_SETRLIMIT:
1724
1725 /*
1726 * Allow System V and POSIX IPC privileges.
1727 */
1728 case PRIV_IPC_READ:
1729 case PRIV_IPC_WRITE:
1730 case PRIV_IPC_ADMIN:
1731 case PRIV_IPC_MSGSIZE:
1732 case PRIV_MQ_ADMIN:
1733
1734 /*
1735 * Allow certain scheduler manipulations -- possibly this should be
1736 * controlled by more fine-grained policy, as potentially low
1737 * integrity processes can deny CPU to higher integrity ones.
1738 */
1739 case PRIV_SCHED_DIFFCRED:
1740 case PRIV_SCHED_SETPRIORITY:
1741 case PRIV_SCHED_RTPRIO:
1742 case PRIV_SCHED_SETPOLICY:
1743 case PRIV_SCHED_SET:
1744 case PRIV_SCHED_SETPARAM:
1745
1746 /*
1747 * More IPC privileges.
1748 */
1749 case PRIV_SEM_WRITE:
1750
1751 /*
1752 * Allow signaling privileges subject to integrity policy.
1753 */
1754 case PRIV_SIGNAL_DIFFCRED:
1755 case PRIV_SIGNAL_SUGID:
1756
1757 /*
1758 * Allow access to only limited sysctls from lower integrity levels;
1759 * piggy-back on the Jail definition.
1760 */
1761 case PRIV_SYSCTL_WRITEJAIL:
1762
1763 /*
1764 * Allow TTY-based privileges, subject to general device access using
1765 * labels on TTY device nodes, but not console privilege.
1766 */
1767 case PRIV_TTY_DRAINWAIT:
1768 case PRIV_TTY_DTRWAIT:
1769 case PRIV_TTY_EXCLUSIVE:
1770 case PRIV_TTY_STI:
1771 case PRIV_TTY_SETA:
1772
1773 /*
1774 * Grant most VFS privileges, as almost all are in practice bounded
1775 * by more specific checks using labels.
1776 */
1777 case PRIV_VFS_READ:
1778 case PRIV_VFS_WRITE:
1779 case PRIV_VFS_ADMIN:
1780 case PRIV_VFS_EXEC:
1781 case PRIV_VFS_LOOKUP:
1782 case PRIV_VFS_CHFLAGS_DEV:
1783 case PRIV_VFS_CHOWN:
1784 case PRIV_VFS_CHROOT:
1785 case PRIV_VFS_RETAINSUGID:
1786 case PRIV_VFS_EXCEEDQUOTA:
1787 case PRIV_VFS_FCHROOT:
1788 case PRIV_VFS_FHOPEN:
1789 case PRIV_VFS_FHSTATFS:
1790 case PRIV_VFS_GENERATION:
1791 case PRIV_VFS_GETFH:
1792 case PRIV_VFS_GETQUOTA:
1793 case PRIV_VFS_LINK:
1794 case PRIV_VFS_MOUNT:
1795 case PRIV_VFS_MOUNT_OWNER:
1796 case PRIV_VFS_MOUNT_PERM:
1797 case PRIV_VFS_MOUNT_SUIDDIR:
1798 case PRIV_VFS_MOUNT_NONUSER:
1799 case PRIV_VFS_SETGID:
1800 case PRIV_VFS_STICKYFILE:
1801 case PRIV_VFS_SYSFLAGS:
1802 case PRIV_VFS_UNMOUNT:
1803
1804 /*
1805 * Allow VM privileges; it would be nice if these were subject to
1806 * resource limits.
1807 */
1808 case PRIV_VM_MADV_PROTECT:
1809 case PRIV_VM_MLOCK:
1810 case PRIV_VM_MUNLOCK:
1811 case PRIV_VM_SWAP_NOQUOTA:
1812 case PRIV_VM_SWAP_NORLIMIT:
1813
1814 /*
1815 * Allow some but not all network privileges. In general, dont allow
1816 * reconfiguring the network stack, just normal use.
1817 */
1818 case PRIV_NETINET_RESERVEDPORT:
1819 case PRIV_NETINET_RAW:
1820 case PRIV_NETINET_REUSEPORT:
1821 break;
1822
1823 /*
1824 * All remaining system privileges are allow only if the process
1825 * holds privilege with respect to the LOMAC policy.
1826 */
1827 default:
1828 subj = SLOT(cred->cr_label);
1829 error = lomac_subject_privileged(subj);
1830 if (error)
1831 return (error);
1832 }
1833 return (0);
1834 }
1835
1836 static int
1837 lomac_proc_check_debug(struct ucred *cred, struct proc *p)
1838 {
1839 struct mac_lomac *subj, *obj;
1840
1841 if (!lomac_enabled)
1842 return (0);
1843
1844 subj = SLOT(cred->cr_label);
1845 obj = SLOT(p->p_ucred->cr_label);
1846
1847 /* XXX: range checks */
1848 if (!lomac_dominate_single(obj, subj))
1849 return (ESRCH);
1850 if (!lomac_subject_dominate(subj, obj))
1851 return (EACCES);
1852
1853 return (0);
1854 }
1855
1856 static int
1857 lomac_proc_check_sched(struct ucred *cred, struct proc *p)
1858 {
1859 struct mac_lomac *subj, *obj;
1860
1861 if (!lomac_enabled)
1862 return (0);
1863
1864 subj = SLOT(cred->cr_label);
1865 obj = SLOT(p->p_ucred->cr_label);
1866
1867 /* XXX: range checks */
1868 if (!lomac_dominate_single(obj, subj))
1869 return (ESRCH);
1870 if (!lomac_subject_dominate(subj, obj))
1871 return (EACCES);
1872
1873 return (0);
1874 }
1875
1876 static int
1877 lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
1878 {
1879 struct mac_lomac *subj, *obj;
1880
1881 if (!lomac_enabled)
1882 return (0);
1883
1884 subj = SLOT(cred->cr_label);
1885 obj = SLOT(p->p_ucred->cr_label);
1886
1887 /* XXX: range checks */
1888 if (!lomac_dominate_single(obj, subj))
1889 return (ESRCH);
1890 if (!lomac_subject_dominate(subj, obj))
1891 return (EACCES);
1892
1893 return (0);
1894 }
1895
1896 static void
1897 lomac_proc_destroy_label(struct label *label)
1898 {
1899
1900 mtx_destroy(&PSLOT(label)->mtx);
1901 free(PSLOT(label), M_LOMAC);
1902 PSLOT_SET(label, NULL);
1903 }
1904
1905 static void
1906 lomac_proc_init_label(struct label *label)
1907 {
1908
1909 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
1910 M_ZERO | M_WAITOK));
1911 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
1912 }
1913
1914 static int
1915 lomac_socket_check_deliver(struct socket *so, struct label *solabel,
1916 struct mbuf *m, struct label *mlabel)
1917 {
1918 struct mac_lomac *p, *s;
1919 int error;
1920
1921 if (!lomac_enabled)
1922 return (0);
1923
1924 p = SLOT(mlabel);
1925 s = SLOT(solabel);
1926
1927 SOCK_LOCK(so);
1928 error = lomac_equal_single(p, s) ? 0 : EACCES;
1929 SOCK_UNLOCK(so);
1930 return (error);
1931 }
1932
1933 static int
1934 lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
1935 struct label *solabel, struct label *newlabel)
1936 {
1937 struct mac_lomac *subj, *obj, *new;
1938 int error;
1939
1940 SOCK_LOCK_ASSERT(so);
1941
1942 new = SLOT(newlabel);
1943 subj = SLOT(cred->cr_label);
1944 obj = SLOT(solabel);
1945
1946 /*
1947 * If there is a LOMAC label update for the socket, it may be an
1948 * update of single.
1949 */
1950 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1951 if (error)
1952 return (error);
1953
1954 /*
1955 * To relabel a socket, the old socket single must be in the subject
1956 * range.
1957 */
1958 if (!lomac_single_in_range(obj, subj))
1959 return (EPERM);
1960
1961 /*
1962 * If the LOMAC label is to be changed, authorize as appropriate.
1963 */
1964 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1965 /*
1966 * To relabel a socket, the new socket single must be in the
1967 * subject range.
1968 */
1969 if (!lomac_single_in_range(new, subj))
1970 return (EPERM);
1971
1972 /*
1973 * To change the LOMAC label on the socket to contain EQUAL,
1974 * the subject must have appropriate privilege.
1975 */
1976 if (lomac_contains_equal(new)) {
1977 error = lomac_subject_privileged(subj);
1978 if (error)
1979 return (error);
1980 }
1981 }
1982
1983 return (0);
1984 }
1985
1986 static int
1987 lomac_socket_check_visible(struct ucred *cred, struct socket *so,
1988 struct label *solabel)
1989 {
1990 struct mac_lomac *subj, *obj;
1991
1992 if (!lomac_enabled)
1993 return (0);
1994
1995 subj = SLOT(cred->cr_label);
1996 obj = SLOT(solabel);
1997
1998 SOCK_LOCK(so);
1999 if (!lomac_dominate_single(obj, subj)) {
2000 SOCK_UNLOCK(so);
2001 return (ENOENT);
2002 }
2003 SOCK_UNLOCK(so);
2004
2005 return (0);
2006 }
2007
2008 static void
2009 lomac_socket_create(struct ucred *cred, struct socket *so,
2010 struct label *solabel)
2011 {
2012 struct mac_lomac *source, *dest;
2013
2014 source = SLOT(cred->cr_label);
2015 dest = SLOT(solabel);
2016
2017 lomac_copy_single(source, dest);
2018 }
2019
2020 static void
2021 lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
2022 struct mbuf *m, struct label *mlabel)
2023 {
2024 struct mac_lomac *source, *dest;
2025
2026 source = SLOT(solabel);
2027 dest = SLOT(mlabel);
2028
2029 SOCK_LOCK(so);
2030 lomac_copy_single(source, dest);
2031 SOCK_UNLOCK(so);
2032 }
2033
2034 static void
2035 lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2036 struct socket *newso, struct label *newsolabel)
2037 {
2038 struct mac_lomac source, *dest;
2039
2040 SOCK_LOCK(oldso);
2041 source = *SLOT(oldsolabel);
2042 SOCK_UNLOCK(oldso);
2043
2044 dest = SLOT(newsolabel);
2045
2046 SOCK_LOCK(newso);
2047 lomac_copy_single(&source, dest);
2048 SOCK_UNLOCK(newso);
2049 }
2050
2051 static void
2052 lomac_socket_relabel(struct ucred *cred, struct socket *so,
2053 struct label *solabel, struct label *newlabel)
2054 {
2055 struct mac_lomac *source, *dest;
2056
2057 SOCK_LOCK_ASSERT(so);
2058
2059 source = SLOT(newlabel);
2060 dest = SLOT(solabel);
2061
2062 try_relabel(source, dest);
2063 }
2064
2065 static void
2066 lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2067 struct socket *so, struct label *sopeerlabel)
2068 {
2069 struct mac_lomac *source, *dest;
2070
2071 source = SLOT(mlabel);
2072 dest = SLOT(sopeerlabel);
2073
2074 SOCK_LOCK(so);
2075 lomac_copy_single(source, dest);
2076 SOCK_UNLOCK(so);
2077 }
2078
2079 static void
2080 lomac_socketpeer_set_from_socket(struct socket *oldso,
2081 struct label *oldsolabel, struct socket *newso,
2082 struct label *newsopeerlabel)
2083 {
2084 struct mac_lomac source, *dest;
2085
2086 SOCK_LOCK(oldso);
2087 source = *SLOT(oldsolabel);
2088 SOCK_UNLOCK(oldso);
2089
2090 dest = SLOT(newsopeerlabel);
2091
2092 SOCK_LOCK(newso);
2093 lomac_copy_single(&source, dest);
2094 SOCK_UNLOCK(newso);
2095 }
2096
2097 static void
2098 lomac_syncache_create(struct label *label, struct inpcb *inp)
2099 {
2100 struct mac_lomac *source, *dest;
2101
2102 source = SLOT(inp->inp_label);
2103 dest = SLOT(label);
2104 lomac_copy(source, dest);
2105 }
2106
2107 static void
2108 lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2109 struct label *mlabel)
2110 {
2111 struct mac_lomac *source, *dest;
2112
2113 source = SLOT(sc_label);
2114 dest = SLOT(mlabel);
2115 lomac_copy(source, dest);
2116 }
2117
2118 static int
2119 lomac_system_check_acct(struct ucred *cred, struct vnode *vp,
2120 struct label *vplabel)
2121 {
2122 struct mac_lomac *subj, *obj;
2123
2124 if (!lomac_enabled)
2125 return (0);
2126
2127 subj = SLOT(cred->cr_label);
2128 obj = SLOT(vplabel);
2129
2130 if (lomac_subject_privileged(subj))
2131 return (EPERM);
2132
2133 if (!lomac_high_single(obj))
2134 return (EACCES);
2135
2136 return (0);
2137 }
2138
2139 static int
2140 lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2141 struct label *vplabel)
2142 {
2143 struct mac_lomac *subj, *obj;
2144
2145 if (!lomac_enabled)
2146 return (0);
2147
2148 subj = SLOT(cred->cr_label);
2149 obj = SLOT(vplabel);
2150
2151 if (lomac_subject_privileged(subj))
2152 return (EPERM);
2153
2154 if (!lomac_high_single(obj))
2155 return (EACCES);
2156
2157 return (0);
2158 }
2159
2160 static int
2161 lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2162 struct label *vplabel)
2163 {
2164 struct mac_lomac *subj;
2165
2166 if (!lomac_enabled)
2167 return (0);
2168
2169 subj = SLOT(cred->cr_label);
2170
2171 if (lomac_subject_privileged(subj))
2172 return (EPERM);
2173
2174 return (0);
2175 }
2176
2177 static int
2178 lomac_system_check_swapon(struct ucred *cred, struct vnode *vp,
2179 struct label *vplabel)
2180 {
2181 struct mac_lomac *subj, *obj;
2182
2183 if (!lomac_enabled)
2184 return (0);
2185
2186 subj = SLOT(cred->cr_label);
2187 obj = SLOT(vplabel);
2188
2189 if (lomac_subject_privileged(subj))
2190 return (EPERM);
2191
2192 if (!lomac_high_single(obj))
2193 return (EACCES);
2194
2195 return (0);
2196 }
2197
2198 static int
2199 lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2200 void *arg1, int arg2, struct sysctl_req *req)
2201 {
2202 struct mac_lomac *subj;
2203
2204 if (!lomac_enabled)
2205 return (0);
2206
2207 subj = SLOT(cred->cr_label);
2208
2209 /*
2210 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high,
2211 * but also require privilege to change them.
2212 */
2213 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2214 #ifdef notdef
2215 if (!lomac_subject_dominate_high(subj))
2216 return (EACCES);
2217 #endif
2218
2219 if (lomac_subject_privileged(subj))
2220 return (EPERM);
2221 }
2222
2223 return (0);
2224 }
2225
2226 static void
2227 lomac_thread_userret(struct thread *td)
2228 {
2229 struct proc *p = td->td_proc;
2230 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2231 struct ucred *newcred, *oldcred;
2232 int dodrop;
2233
2234 mtx_lock(&subj->mtx);
2235 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2236 dodrop = 0;
2237 mtx_unlock(&subj->mtx);
2238 newcred = crget();
2239 /*
2240 * Prevent a lock order reversal in mac_proc_vm_revoke;
2241 * ideally, the other user of subj->mtx wouldn't be holding
2242 * Giant.
2243 */
2244 mtx_lock(&Giant);
2245 PROC_LOCK(p);
2246 mtx_lock(&subj->mtx);
2247 /*
2248 * Check if we lost the race while allocating the cred.
2249 */
2250 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2251 crfree(newcred);
2252 goto out;
2253 }
2254 oldcred = p->p_ucred;
2255 crcopy(newcred, oldcred);
2256 crhold(newcred);
2257 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2258 proc_set_cred(p, newcred);
2259 crfree(oldcred);
2260 dodrop = 1;
2261 out:
2262 mtx_unlock(&subj->mtx);
2263 PROC_UNLOCK(p);
2264 if (dodrop)
2265 mac_proc_vm_revoke(curthread);
2266 mtx_unlock(&Giant);
2267 } else {
2268 mtx_unlock(&subj->mtx);
2269 }
2270 }
2271
2272 static int
2273 lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2274 struct vnode *vp, struct label *vplabel)
2275 {
2276 struct mac_lomac ml_temp, *source, *dest;
2277 int buflen, error;
2278
2279 source = SLOT(mplabel);
2280 dest = SLOT(vplabel);
2281
2282 buflen = sizeof(ml_temp);
2283 bzero(&ml_temp, buflen);
2284
2285 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2286 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
2287 if (error == ENOATTR || error == EOPNOTSUPP) {
2288 /* Fall back to the mntlabel. */
2289 lomac_copy_single(source, dest);
2290 return (0);
2291 } else if (error)
2292 return (error);
2293
2294 if (buflen != sizeof(ml_temp)) {
2295 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
2296 printf("lomac_vnode_associate_extattr: bad size %d\n",
2297 buflen);
2298 return (EPERM);
2299 }
2300 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
2301 buflen = sizeof(ml_temp);
2302 (void)vn_extattr_set(vp, IO_NODELOCKED,
2303 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
2304 buflen, (char *)&ml_temp, curthread);
2305 }
2306 if (lomac_valid(&ml_temp) != 0) {
2307 printf("lomac_vnode_associate_extattr: invalid\n");
2308 return (EPERM);
2309 }
2310 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
2311 MAC_LOMAC_FLAG_SINGLE) {
2312 printf("lomac_vnode_associate_extattr: not single\n");
2313 return (EPERM);
2314 }
2315
2316 lomac_copy_single(&ml_temp, dest);
2317 return (0);
2318 }
2319
2320 static void
2321 lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2322 struct vnode *vp, struct label *vplabel)
2323 {
2324 struct mac_lomac *source, *dest;
2325
2326 source = SLOT(mplabel);
2327 dest = SLOT(vplabel);
2328
2329 lomac_copy_single(source, dest);
2330 }
2331
2332 static int
2333 lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2334 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2335 {
2336 struct mac_lomac *subj, *obj;
2337
2338 if (!lomac_enabled)
2339 return (0);
2340
2341 subj = SLOT(cred->cr_label);
2342 obj = SLOT(dvplabel);
2343
2344 if (!lomac_subject_dominate(subj, obj))
2345 return (EACCES);
2346 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2347 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2348 return (EACCES);
2349
2350 return (0);
2351 }
2352
2353 static int
2354 lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2355 struct label *vplabel, acl_type_t type)
2356 {
2357 struct mac_lomac *subj, *obj;
2358
2359 if (!lomac_enabled)
2360 return (0);
2361
2362 subj = SLOT(cred->cr_label);
2363 obj = SLOT(vplabel);
2364
2365 if (!lomac_subject_dominate(subj, obj))
2366 return (EACCES);
2367
2368 return (0);
2369 }
2370
2371 static int
2372 lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
2373 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2374 struct componentname *cnp)
2375 {
2376 struct mac_lomac *subj, *obj;
2377
2378 if (!lomac_enabled)
2379 return (0);
2380
2381 subj = SLOT(cred->cr_label);
2382 obj = SLOT(dvplabel);
2383
2384 if (!lomac_subject_dominate(subj, obj))
2385 return (EACCES);
2386
2387 obj = SLOT(vplabel);
2388
2389 if (!lomac_subject_dominate(subj, obj))
2390 return (EACCES);
2391
2392 return (0);
2393 }
2394
2395 static int
2396 lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
2397 struct label *vplabel, int prot, int flags)
2398 {
2399 struct mac_lomac *subj, *obj;
2400
2401 /*
2402 * Rely on the use of open()-time protections to handle
2403 * non-revocation cases.
2404 */
2405 if (!lomac_enabled)
2406 return (0);
2407
2408 subj = SLOT(cred->cr_label);
2409 obj = SLOT(vplabel);
2410
2411 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2412 if (!lomac_subject_dominate(subj, obj))
2413 return (EACCES);
2414 }
2415 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2416 if (!lomac_dominate_single(obj, subj))
2417 return (maybe_demote(subj, obj, "mapping", "file", vp));
2418 }
2419
2420 return (0);
2421 }
2422
2423 static void
2424 lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2425 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2426 {
2427 struct mac_lomac *subj, *obj;
2428
2429 /*
2430 * Rely on the use of open()-time protections to handle
2431 * non-revocation cases.
2432 */
2433 if (!lomac_enabled || !revocation_enabled)
2434 return;
2435
2436 subj = SLOT(cred->cr_label);
2437 obj = SLOT(vplabel);
2438
2439 if (!lomac_subject_dominate(subj, obj))
2440 *prot &= ~VM_PROT_WRITE;
2441 }
2442
2443 static int
2444 lomac_vnode_check_open(struct ucred *cred, struct vnode *vp,
2445 struct label *vplabel, accmode_t accmode)
2446 {
2447 struct mac_lomac *subj, *obj;
2448
2449 if (!lomac_enabled)
2450 return (0);
2451
2452 subj = SLOT(cred->cr_label);
2453 obj = SLOT(vplabel);
2454
2455 /* XXX privilege override for admin? */
2456 if (accmode & VMODIFY_PERMS) {
2457 if (!lomac_subject_dominate(subj, obj))
2458 return (EACCES);
2459 }
2460
2461 return (0);
2462 }
2463
2464 static int
2465 lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
2466 struct vnode *vp, struct label *vplabel)
2467 {
2468 struct mac_lomac *subj, *obj;
2469
2470 if (!lomac_enabled || !revocation_enabled)
2471 return (0);
2472
2473 subj = SLOT(active_cred->cr_label);
2474 obj = SLOT(vplabel);
2475
2476 if (!lomac_dominate_single(obj, subj))
2477 return (maybe_demote(subj, obj, "reading", "file", vp));
2478
2479 return (0);
2480 }
2481
2482 static int
2483 lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
2484 struct label *vplabel, struct label *newlabel)
2485 {
2486 struct mac_lomac *old, *new, *subj;
2487 int error;
2488
2489 old = SLOT(vplabel);
2490 new = SLOT(newlabel);
2491 subj = SLOT(cred->cr_label);
2492
2493 /*
2494 * If there is a LOMAC label update for the vnode, it must be a
2495 * single label, with an optional explicit auxiliary single.
2496 */
2497 error = lomac_atmostflags(new,
2498 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2499 if (error)
2500 return (error);
2501
2502 /*
2503 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2504 * authorize the relabel.
2505 */
2506 if (!lomac_single_in_range(old, subj))
2507 return (EPERM);
2508
2509 /*
2510 * If the LOMAC label is to be changed, authorize as appropriate.
2511 */
2512 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2513 /*
2514 * To change the LOMAC label on a vnode, the new vnode label
2515 * must be in the subject range.
2516 */
2517 if (!lomac_single_in_range(new, subj))
2518 return (EPERM);
2519
2520 /*
2521 * To change the LOMAC label on the vnode to be EQUAL, the
2522 * subject must have appropriate privilege.
2523 */
2524 if (lomac_contains_equal(new)) {
2525 error = lomac_subject_privileged(subj);
2526 if (error)
2527 return (error);
2528 }
2529 }
2530 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2531 /*
2532 * Fill in the missing parts from the previous label.
2533 */
2534 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2535 lomac_copy_single(subj, new);
2536
2537 /*
2538 * To change the auxiliary LOMAC label on a vnode, the new
2539 * vnode label must be in the subject range.
2540 */
2541 if (!lomac_auxsingle_in_range(new, subj))
2542 return (EPERM);
2543
2544 /*
2545 * To change the auxiliary LOMAC label on the vnode to be
2546 * EQUAL, the subject must have appropriate privilege.
2547 */
2548 if (lomac_contains_equal(new)) {
2549 error = lomac_subject_privileged(subj);
2550 if (error)
2551 return (error);
2552 }
2553 }
2554
2555 return (0);
2556 }
2557
2558 static int
2559 lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
2560 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2561 struct componentname *cnp)
2562 {
2563 struct mac_lomac *subj, *obj;
2564
2565 if (!lomac_enabled)
2566 return (0);
2567
2568 subj = SLOT(cred->cr_label);
2569 obj = SLOT(dvplabel);
2570
2571 if (!lomac_subject_dominate(subj, obj))
2572 return (EACCES);
2573
2574 obj = SLOT(vplabel);
2575
2576 if (!lomac_subject_dominate(subj, obj))
2577 return (EACCES);
2578
2579 return (0);
2580 }
2581
2582 static int
2583 lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
2584 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2585 int samedir, struct componentname *cnp)
2586 {
2587 struct mac_lomac *subj, *obj;
2588
2589 if (!lomac_enabled)
2590 return (0);
2591
2592 subj = SLOT(cred->cr_label);
2593 obj = SLOT(dvplabel);
2594
2595 if (!lomac_subject_dominate(subj, obj))
2596 return (EACCES);
2597
2598 if (vp != NULL) {
2599 obj = SLOT(vplabel);
2600
2601 if (!lomac_subject_dominate(subj, obj))
2602 return (EACCES);
2603 }
2604
2605 return (0);
2606 }
2607
2608 static int
2609 lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
2610 struct label *vplabel)
2611 {
2612 struct mac_lomac *subj, *obj;
2613
2614 if (!lomac_enabled)
2615 return (0);
2616
2617 subj = SLOT(cred->cr_label);
2618 obj = SLOT(vplabel);
2619
2620 if (!lomac_subject_dominate(subj, obj))
2621 return (EACCES);
2622
2623 return (0);
2624 }
2625
2626 static int
2627 lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
2628 struct label *vplabel, acl_type_t type, struct acl *acl)
2629 {
2630 struct mac_lomac *subj, *obj;
2631
2632 if (!lomac_enabled)
2633 return (0);
2634
2635 subj = SLOT(cred->cr_label);
2636 obj = SLOT(vplabel);
2637
2638 if (!lomac_subject_dominate(subj, obj))
2639 return (EACCES);
2640
2641 return (0);
2642 }
2643
2644 static int
2645 lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
2646 struct label *vplabel, int attrnamespace, const char *name)
2647 {
2648 struct mac_lomac *subj, *obj;
2649
2650 if (!lomac_enabled)
2651 return (0);
2652
2653 subj = SLOT(cred->cr_label);
2654 obj = SLOT(vplabel);
2655
2656 if (!lomac_subject_dominate(subj, obj))
2657 return (EACCES);
2658
2659 /* XXX: protect the MAC EA in a special way? */
2660
2661 return (0);
2662 }
2663
2664 static int
2665 lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
2666 struct label *vplabel, u_long flags)
2667 {
2668 struct mac_lomac *subj, *obj;
2669
2670 if (!lomac_enabled)
2671 return (0);
2672
2673 subj = SLOT(cred->cr_label);
2674 obj = SLOT(vplabel);
2675
2676 if (!lomac_subject_dominate(subj, obj))
2677 return (EACCES);
2678
2679 return (0);
2680 }
2681
2682 static int
2683 lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
2684 struct label *vplabel, mode_t mode)
2685 {
2686 struct mac_lomac *subj, *obj;
2687
2688 if (!lomac_enabled)
2689 return (0);
2690
2691 subj = SLOT(cred->cr_label);
2692 obj = SLOT(vplabel);
2693
2694 if (!lomac_subject_dominate(subj, obj))
2695 return (EACCES);
2696
2697 return (0);
2698 }
2699
2700 static int
2701 lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
2702 struct label *vplabel, uid_t uid, gid_t gid)
2703 {
2704 struct mac_lomac *subj, *obj;
2705
2706 if (!lomac_enabled)
2707 return (0);
2708
2709 subj = SLOT(cred->cr_label);
2710 obj = SLOT(vplabel);
2711
2712 if (!lomac_subject_dominate(subj, obj))
2713 return (EACCES);
2714
2715 return (0);
2716 }
2717
2718 static int
2719 lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
2720 struct label *vplabel, struct timespec atime, struct timespec mtime)
2721 {
2722 struct mac_lomac *subj, *obj;
2723
2724 if (!lomac_enabled)
2725 return (0);
2726
2727 subj = SLOT(cred->cr_label);
2728 obj = SLOT(vplabel);
2729
2730 if (!lomac_subject_dominate(subj, obj))
2731 return (EACCES);
2732
2733 return (0);
2734 }
2735
2736 static int
2737 lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
2738 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2739 struct componentname *cnp)
2740 {
2741 struct mac_lomac *subj, *obj;
2742
2743 if (!lomac_enabled)
2744 return (0);
2745
2746 subj = SLOT(cred->cr_label);
2747 obj = SLOT(dvplabel);
2748
2749 if (!lomac_subject_dominate(subj, obj))
2750 return (EACCES);
2751
2752 obj = SLOT(vplabel);
2753
2754 if (!lomac_subject_dominate(subj, obj))
2755 return (EACCES);
2756
2757 return (0);
2758 }
2759
2760 static int
2761 lomac_vnode_check_write(struct ucred *active_cred,
2762 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2763 {
2764 struct mac_lomac *subj, *obj;
2765
2766 if (!lomac_enabled || !revocation_enabled)
2767 return (0);
2768
2769 subj = SLOT(active_cred->cr_label);
2770 obj = SLOT(vplabel);
2771
2772 if (!lomac_subject_dominate(subj, obj))
2773 return (EACCES);
2774
2775 return (0);
2776 }
2777
2778 static int
2779 lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
2780 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
2781 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
2782 {
2783 struct mac_lomac *source, *dest, *dir, temp;
2784 size_t buflen;
2785 int error;
2786
2787 buflen = sizeof(temp);
2788 bzero(&temp, buflen);
2789
2790 source = SLOT(cred->cr_label);
2791 dest = SLOT(vplabel);
2792 dir = SLOT(dvplabel);
2793 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
2794 lomac_copy_auxsingle(dir, &temp);
2795 lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
2796 dir->ml_auxsingle.mle_grade);
2797 } else {
2798 lomac_copy_single(source, &temp);
2799 }
2800
2801 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2802 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2803 if (error == 0)
2804 lomac_copy(&temp, dest);
2805 return (error);
2806 }
2807
2808 static void
2809 lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
2810 struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
2811 struct image_params *imgp, struct label *execlabel)
2812 {
2813 struct mac_lomac *source, *dest, *obj, *robj;
2814
2815 source = SLOT(old->cr_label);
2816 dest = SLOT(new->cr_label);
2817 obj = SLOT(vplabel);
2818 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2819
2820 lomac_copy(source, dest);
2821 /*
2822 * If there's an auxiliary label on the real object, respect it and
2823 * assume that this level should be assumed immediately if a higher
2824 * level is currently in place.
2825 */
2826 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2827 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
2828 && lomac_auxsingle_in_range(robj, dest))
2829 lomac_set_single(dest, robj->ml_auxsingle.mle_type,
2830 robj->ml_auxsingle.mle_grade);
2831 /*
2832 * Restructuring to use the execve transitioning mechanism instead of
2833 * the normal demotion mechanism here would be difficult, so just
2834 * copy the label over and perform standard demotion. This is also
2835 * non-optimal because it will result in the intermediate label "new"
2836 * being created and immediately recycled.
2837 */
2838 if (lomac_enabled && revocation_enabled &&
2839 !lomac_dominate_single(obj, source))
2840 (void)maybe_demote(source, obj, "executing", "file", vp);
2841 }
2842
2843 static int
2844 lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
2845 struct label *vplabel, struct label *interpvplabel,
2846 struct image_params *imgp, struct label *execlabel)
2847 {
2848 struct mac_lomac *subj, *obj, *robj;
2849
2850 if (!lomac_enabled || !revocation_enabled)
2851 return (0);
2852
2853 subj = SLOT(old->cr_label);
2854 obj = SLOT(vplabel);
2855 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2856
2857 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2858 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
2859 && lomac_auxsingle_in_range(robj, subj)) ||
2860 !lomac_dominate_single(obj, subj));
2861 }
2862
2863 static void
2864 lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
2865 struct label *vplabel, struct label *newlabel)
2866 {
2867 struct mac_lomac *source, *dest;
2868
2869 source = SLOT(newlabel);
2870 dest = SLOT(vplabel);
2871
2872 try_relabel(source, dest);
2873 }
2874
2875 static int
2876 lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
2877 struct label *vplabel, struct label *intlabel)
2878 {
2879 struct mac_lomac *source, temp;
2880 size_t buflen;
2881 int error;
2882
2883 buflen = sizeof(temp);
2884 bzero(&temp, buflen);
2885
2886 source = SLOT(intlabel);
2887 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2888 return (0);
2889
2890 lomac_copy_single(source, &temp);
2891 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2892 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2893 return (error);
2894 }
2895
2896 static struct mac_policy_ops lomac_ops =
2897 {
2898 .mpo_init = lomac_init,
2899
2900 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive,
2901 .mpo_bpfdesc_create = lomac_bpfdesc_create,
2902 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf,
2903 .mpo_bpfdesc_destroy_label = lomac_destroy_label,
2904 .mpo_bpfdesc_init_label = lomac_init_label,
2905
2906 .mpo_cred_check_relabel = lomac_cred_check_relabel,
2907 .mpo_cred_check_visible = lomac_cred_check_visible,
2908 .mpo_cred_copy_label = lomac_copy_label,
2909 .mpo_cred_create_swapper = lomac_cred_create_swapper,
2910 .mpo_cred_create_init = lomac_cred_create_init,
2911 .mpo_cred_destroy_label = lomac_destroy_label,
2912 .mpo_cred_externalize_label = lomac_externalize_label,
2913 .mpo_cred_init_label = lomac_init_label,
2914 .mpo_cred_internalize_label = lomac_internalize_label,
2915 .mpo_cred_relabel = lomac_cred_relabel,
2916
2917 .mpo_devfs_create_device = lomac_devfs_create_device,
2918 .mpo_devfs_create_directory = lomac_devfs_create_directory,
2919 .mpo_devfs_create_symlink = lomac_devfs_create_symlink,
2920 .mpo_devfs_destroy_label = lomac_destroy_label,
2921 .mpo_devfs_init_label = lomac_init_label,
2922 .mpo_devfs_update = lomac_devfs_update,
2923 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate,
2924
2925 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel,
2926 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit,
2927 .mpo_ifnet_copy_label = lomac_copy_label,
2928 .mpo_ifnet_create = lomac_ifnet_create,
2929 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf,
2930 .mpo_ifnet_destroy_label = lomac_destroy_label,
2931 .mpo_ifnet_externalize_label = lomac_externalize_label,
2932 .mpo_ifnet_init_label = lomac_init_label,
2933 .mpo_ifnet_internalize_label = lomac_internalize_label,
2934 .mpo_ifnet_relabel = lomac_ifnet_relabel,
2935
2936 .mpo_syncache_create = lomac_syncache_create,
2937 .mpo_syncache_destroy_label = lomac_destroy_label,
2938 .mpo_syncache_init_label = lomac_init_label_waitcheck,
2939
2940 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver,
2941 .mpo_inpcb_check_visible = lomac_inpcb_check_visible,
2942 .mpo_inpcb_create = lomac_inpcb_create,
2943 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf,
2944 .mpo_inpcb_destroy_label = lomac_destroy_label,
2945 .mpo_inpcb_init_label = lomac_init_label_waitcheck,
2946 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
2947
2948 .mpo_ip6q_create = lomac_ip6q_create,
2949 .mpo_ip6q_destroy_label = lomac_destroy_label,
2950 .mpo_ip6q_init_label = lomac_init_label_waitcheck,
2951 .mpo_ip6q_match = lomac_ip6q_match,
2952 .mpo_ip6q_reassemble = lomac_ip6q_reassemble,
2953 .mpo_ip6q_update = lomac_ip6q_update,
2954
2955 .mpo_ipq_create = lomac_ipq_create,
2956 .mpo_ipq_destroy_label = lomac_destroy_label,
2957 .mpo_ipq_init_label = lomac_init_label_waitcheck,
2958 .mpo_ipq_match = lomac_ipq_match,
2959 .mpo_ipq_reassemble = lomac_ipq_reassemble,
2960 .mpo_ipq_update = lomac_ipq_update,
2961
2962 .mpo_kld_check_load = lomac_kld_check_load,
2963
2964 .mpo_mbuf_copy_label = lomac_copy_label,
2965 .mpo_mbuf_destroy_label = lomac_destroy_label,
2966 .mpo_mbuf_init_label = lomac_init_label_waitcheck,
2967
2968 .mpo_mount_create = lomac_mount_create,
2969 .mpo_mount_destroy_label = lomac_destroy_label,
2970 .mpo_mount_init_label = lomac_init_label,
2971
2972 .mpo_netinet_arp_send = lomac_netinet_arp_send,
2973 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply,
2974 .mpo_netinet_firewall_send = lomac_netinet_firewall_send,
2975 .mpo_netinet_fragment = lomac_netinet_fragment,
2976 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply,
2977 .mpo_netinet_igmp_send = lomac_netinet_igmp_send,
2978
2979 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send,
2980
2981 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl,
2982 .mpo_pipe_check_read = lomac_pipe_check_read,
2983 .mpo_pipe_check_relabel = lomac_pipe_check_relabel,
2984 .mpo_pipe_check_write = lomac_pipe_check_write,
2985 .mpo_pipe_copy_label = lomac_copy_label,
2986 .mpo_pipe_create = lomac_pipe_create,
2987 .mpo_pipe_destroy_label = lomac_destroy_label,
2988 .mpo_pipe_externalize_label = lomac_externalize_label,
2989 .mpo_pipe_init_label = lomac_init_label,
2990 .mpo_pipe_internalize_label = lomac_internalize_label,
2991 .mpo_pipe_relabel = lomac_pipe_relabel,
2992
2993 .mpo_priv_check = lomac_priv_check,
2994
2995 .mpo_proc_check_debug = lomac_proc_check_debug,
2996 .mpo_proc_check_sched = lomac_proc_check_sched,
2997 .mpo_proc_check_signal = lomac_proc_check_signal,
2998 .mpo_proc_destroy_label = lomac_proc_destroy_label,
2999 .mpo_proc_init_label = lomac_proc_init_label,
3000
3001 .mpo_socket_check_deliver = lomac_socket_check_deliver,
3002 .mpo_socket_check_relabel = lomac_socket_check_relabel,
3003 .mpo_socket_check_visible = lomac_socket_check_visible,
3004 .mpo_socket_copy_label = lomac_copy_label,
3005 .mpo_socket_create = lomac_socket_create,
3006 .mpo_socket_create_mbuf = lomac_socket_create_mbuf,
3007 .mpo_socket_destroy_label = lomac_destroy_label,
3008 .mpo_socket_externalize_label = lomac_externalize_label,
3009 .mpo_socket_init_label = lomac_init_label_waitcheck,
3010 .mpo_socket_internalize_label = lomac_internalize_label,
3011 .mpo_socket_newconn = lomac_socket_newconn,
3012 .mpo_socket_relabel = lomac_socket_relabel,
3013
3014 .mpo_socketpeer_destroy_label = lomac_destroy_label,
3015 .mpo_socketpeer_externalize_label = lomac_externalize_label,
3016 .mpo_socketpeer_init_label = lomac_init_label_waitcheck,
3017 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf,
3018 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket,
3019
3020 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf,
3021
3022 .mpo_system_check_acct = lomac_system_check_acct,
3023 .mpo_system_check_auditctl = lomac_system_check_auditctl,
3024 .mpo_system_check_swapoff = lomac_system_check_swapoff,
3025 .mpo_system_check_swapon = lomac_system_check_swapon,
3026 .mpo_system_check_sysctl = lomac_system_check_sysctl,
3027
3028 .mpo_thread_userret = lomac_thread_userret,
3029
3030 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr,
3031 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel,
3032 .mpo_vnode_check_access = lomac_vnode_check_open,
3033 .mpo_vnode_check_create = lomac_vnode_check_create,
3034 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl,
3035 .mpo_vnode_check_link = lomac_vnode_check_link,
3036 .mpo_vnode_check_mmap = lomac_vnode_check_mmap,
3037 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade,
3038 .mpo_vnode_check_open = lomac_vnode_check_open,
3039 .mpo_vnode_check_read = lomac_vnode_check_read,
3040 .mpo_vnode_check_relabel = lomac_vnode_check_relabel,
3041 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from,
3042 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to,
3043 .mpo_vnode_check_revoke = lomac_vnode_check_revoke,
3044 .mpo_vnode_check_setacl = lomac_vnode_check_setacl,
3045 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr,
3046 .mpo_vnode_check_setflags = lomac_vnode_check_setflags,
3047 .mpo_vnode_check_setmode = lomac_vnode_check_setmode,
3048 .mpo_vnode_check_setowner = lomac_vnode_check_setowner,
3049 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes,
3050 .mpo_vnode_check_unlink = lomac_vnode_check_unlink,
3051 .mpo_vnode_check_write = lomac_vnode_check_write,
3052 .mpo_vnode_copy_label = lomac_copy_label,
3053 .mpo_vnode_create_extattr = lomac_vnode_create_extattr,
3054 .mpo_vnode_destroy_label = lomac_destroy_label,
3055 .mpo_vnode_execve_transition = lomac_vnode_execve_transition,
3056 .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition,
3057 .mpo_vnode_externalize_label = lomac_externalize_label,
3058 .mpo_vnode_init_label = lomac_init_label,
3059 .mpo_vnode_internalize_label = lomac_internalize_label,
3060 .mpo_vnode_relabel = lomac_vnode_relabel,
3061 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr,
3062 };
3063
3064 MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
3065 MPC_LOADTIME_FLAG_NOTLATE, &lomac_slot);
Cache object: 1fecc17d125014cc86cb1844f2527525
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