141
142static struct mac_lomac *
143lomac_alloc(int flag)
144{
145 struct mac_lomac *ml;
146
147 ml = malloc(sizeof(*ml), M_LOMAC, M_ZERO | flag);
148
149 return (ml);
150}
151
152static void
153lomac_free(struct mac_lomac *ml)
154{
155
156 if (ml != NULL)
157 free(ml, M_LOMAC);
158 else
159 atomic_add_int(&destroyed_not_inited, 1);
160}
161
162static int
163lomac_atmostflags(struct mac_lomac *ml, int flags)
164{
165
166 if ((ml->ml_flags & flags) != ml->ml_flags)
167 return (EINVAL);
168 return (0);
169}
170
171static int
172lomac_dominate_element(struct mac_lomac_element *a,
173 struct mac_lomac_element *b)
174{
175
176 switch (a->mle_type) {
177 case MAC_LOMAC_TYPE_EQUAL:
178 case MAC_LOMAC_TYPE_HIGH:
179 return (1);
180
181 case MAC_LOMAC_TYPE_LOW:
182 switch (b->mle_type) {
183 case MAC_LOMAC_TYPE_GRADE:
184 case MAC_LOMAC_TYPE_HIGH:
185 return (0);
186
187 case MAC_LOMAC_TYPE_EQUAL:
188 case MAC_LOMAC_TYPE_LOW:
189 return (1);
190
191 default:
192 panic("lomac_dominate_element: b->mle_type invalid");
193 }
194
195 case MAC_LOMAC_TYPE_GRADE:
196 switch (b->mle_type) {
197 case MAC_LOMAC_TYPE_EQUAL:
198 case MAC_LOMAC_TYPE_LOW:
199 return (1);
200
201 case MAC_LOMAC_TYPE_HIGH:
202 return (0);
203
204 case MAC_LOMAC_TYPE_GRADE:
205 return (a->mle_grade >= b->mle_grade);
206
207 default:
208 panic("lomac_dominate_element: b->mle_type invalid");
209 }
210
211 default:
212 panic("lomac_dominate_element: a->mle_type invalid");
213 }
214}
215
216static int
217lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
218{
219
220 return (lomac_dominate_element(&rangeb->ml_rangehigh,
221 &rangea->ml_rangehigh) &&
222 lomac_dominate_element(&rangea->ml_rangelow,
223 &rangeb->ml_rangelow));
224}
225
226static int
227lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
228{
229
230 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
231 ("lomac_single_in_range: a not single"));
232 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
233 ("lomac_single_in_range: b not range"));
234
235 return (lomac_dominate_element(&range->ml_rangehigh,
236 &single->ml_single) && lomac_dominate_element(&single->ml_single,
237 &range->ml_rangelow));
238}
239
240static int
241lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
242{
243
244 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
245 ("lomac_single_in_range: a not auxsingle"));
246 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
247 ("lomac_single_in_range: b not range"));
248
249 return (lomac_dominate_element(&range->ml_rangehigh,
250 &single->ml_auxsingle) &&
251 lomac_dominate_element(&single->ml_auxsingle,
252 &range->ml_rangelow));
253}
254
255static int
256lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
257{
258 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
259 ("lomac_dominate_single: a not single"));
260 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
261 ("lomac_dominate_single: b not single"));
262
263 return (lomac_dominate_element(&a->ml_single, &b->ml_single));
264}
265
266static int
267lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
268{
269 KASSERT((~a->ml_flags &
270 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
271 ("lomac_dominate_single: a not subject"));
272 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
273 ("lomac_dominate_single: b not single"));
274
275 return (lomac_dominate_element(&a->ml_rangehigh, &b->ml_single));
276}
277
278static int
279lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
280{
281
282 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
283 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
284 return (1);
285
286 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
287}
288
289static int
290lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
291{
292
293 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
294 ("lomac_equal_single: a not single"));
295 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
296 ("lomac_equal_single: b not single"));
297
298 return (lomac_equal_element(&a->ml_single, &b->ml_single));
299}
300
301static int
302lomac_contains_equal(struct mac_lomac *ml)
303{
304
305 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE)
306 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
307 return (1);
308 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX)
309 if (ml->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
310 return (1);
311
312 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
313 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
314 return (1);
315 if (ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
316 return (1);
317 }
318
319 return (0);
320}
321
322static int
323lomac_subject_privileged(struct mac_lomac *ml)
324{
325
326 KASSERT((ml->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
327 MAC_LOMAC_FLAGS_BOTH,
328 ("lomac_subject_privileged: subject doesn't have both labels"));
329
330 /* If the single is EQUAL, it's ok. */
331 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
332 return (0);
333
334 /* If either range endpoint is EQUAL, it's ok. */
335 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
336 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
337 return (0);
338
339 /* If the range is low-high, it's ok. */
340 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
341 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
342 return (0);
343
344 /* It's not ok. */
345 return (EPERM);
346}
347
348static int
349lomac_high_single(struct mac_lomac *ml)
350{
351
352 KASSERT((ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
353 ("lomac_high_single: mac_lomac not single"));
354
355 return (ml->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
356}
357
358static int
359lomac_valid(struct mac_lomac *ml)
360{
361
362 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
363 switch (ml->ml_single.mle_type) {
364 case MAC_LOMAC_TYPE_GRADE:
365 case MAC_LOMAC_TYPE_EQUAL:
366 case MAC_LOMAC_TYPE_HIGH:
367 case MAC_LOMAC_TYPE_LOW:
368 break;
369
370 default:
371 return (EINVAL);
372 }
373 } else {
374 if (ml->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
375 return (EINVAL);
376 }
377
378 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
379 switch (ml->ml_auxsingle.mle_type) {
380 case MAC_LOMAC_TYPE_GRADE:
381 case MAC_LOMAC_TYPE_EQUAL:
382 case MAC_LOMAC_TYPE_HIGH:
383 case MAC_LOMAC_TYPE_LOW:
384 break;
385
386 default:
387 return (EINVAL);
388 }
389 } else {
390 if (ml->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
391 return (EINVAL);
392 }
393
394 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
395 switch (ml->ml_rangelow.mle_type) {
396 case MAC_LOMAC_TYPE_GRADE:
397 case MAC_LOMAC_TYPE_EQUAL:
398 case MAC_LOMAC_TYPE_HIGH:
399 case MAC_LOMAC_TYPE_LOW:
400 break;
401
402 default:
403 return (EINVAL);
404 }
405
406 switch (ml->ml_rangehigh.mle_type) {
407 case MAC_LOMAC_TYPE_GRADE:
408 case MAC_LOMAC_TYPE_EQUAL:
409 case MAC_LOMAC_TYPE_HIGH:
410 case MAC_LOMAC_TYPE_LOW:
411 break;
412
413 default:
414 return (EINVAL);
415 }
416 if (!lomac_dominate_element(&ml->ml_rangehigh,
417 &ml->ml_rangelow))
418 return (EINVAL);
419 } else {
420 if (ml->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
421 ml->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
422 return (EINVAL);
423 }
424
425 return (0);
426}
427
428static void
429lomac_set_range(struct mac_lomac *ml, u_short typelow, u_short gradelow,
430 u_short typehigh, u_short gradehigh)
431{
432
433 ml->ml_rangelow.mle_type = typelow;
434 ml->ml_rangelow.mle_grade = gradelow;
435 ml->ml_rangehigh.mle_type = typehigh;
436 ml->ml_rangehigh.mle_grade = gradehigh;
437 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
438}
439
440static void
441lomac_set_single(struct mac_lomac *ml, u_short type, u_short grade)
442{
443
444 ml->ml_single.mle_type = type;
445 ml->ml_single.mle_grade = grade;
446 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
447}
448
449static void
450lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
451{
452
453 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
454 ("lomac_copy_range: labelfrom not range"));
455
456 labelto->ml_rangelow = labelfrom->ml_rangelow;
457 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
458 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
459}
460
461static void
462lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
463{
464
465 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
466 ("lomac_copy_single: labelfrom not single"));
467
468 labelto->ml_single = labelfrom->ml_single;
469 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
470}
471
472static void
473lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
474{
475
476 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
477 ("lomac_copy_auxsingle: labelfrom not auxsingle"));
478
479 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
480 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
481}
482
483static void
484lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
485{
486
487 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
488 lomac_copy_single(source, dest);
489 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
490 lomac_copy_auxsingle(source, dest);
491 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
492 lomac_copy_range(source, dest);
493}
494
495static int lomac_to_string(struct sbuf *sb, struct mac_lomac *ml);
496
497static int
498maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
499 const char *actionname, const char *objname, struct vnode *vp)
500{
501 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
502 char *subjlabeltext, *objlabeltext, *subjtext;
503 struct mac_lomac cached_subjlabel;
504 struct mac_lomac_proc *subj;
505 struct vattr va;
506 struct proc *p;
507 pid_t pgid;
508
509 subj = PSLOT(curthread->td_proc->p_label);
510
511 p = curthread->td_proc;
512 mtx_lock(&subj->mtx);
513 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
514 /*
515 * Check to see if the pending demotion would be more or less
516 * severe than this one, and keep the more severe. This can
517 * only happen for a multi-threaded application.
518 */
519 if (lomac_dominate_single(objlabel, &subj->mac_lomac)) {
520 mtx_unlock(&subj->mtx);
521 return (0);
522 }
523 }
524 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
525 /*
526 * Always demote the single label.
527 */
528 lomac_copy_single(objlabel, &subj->mac_lomac);
529 /*
530 * Start with the original range, then minimize each side of the
531 * range to the point of not dominating the object. The high side
532 * will always be demoted, of course.
533 */
534 lomac_copy_range(subjlabel, &subj->mac_lomac);
535 if (!lomac_dominate_element(&objlabel->ml_single,
536 &subj->mac_lomac.ml_rangelow))
537 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
538 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
539 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
540 thread_lock(curthread);
541 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND;
542 thread_unlock(curthread);
543
544 /*
545 * Avoid memory allocation while holding a mutex; cache the label.
546 */
547 lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
548 mtx_unlock(&subj->mtx);
549
550 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
551 lomac_to_string(&subjlabel_sb, subjlabel);
552 sbuf_finish(&subjlabel_sb);
553 subjlabeltext = sbuf_data(&subjlabel_sb);
554
555 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
556 lomac_to_string(&subjtext_sb, &subj->mac_lomac);
557 sbuf_finish(&subjtext_sb);
558 subjtext = sbuf_data(&subjtext_sb);
559
560 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
561 lomac_to_string(&objlabel_sb, objlabel);
562 sbuf_finish(&objlabel_sb);
563 objlabeltext = sbuf_data(&objlabel_sb);
564
565 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
566 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred) == 0) {
567 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
568 " level %s after %s a level-%s %s (inode=%ld, "
569 "mountpount=%s)\n",
570 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
571 p->p_comm, subjtext, actionname, objlabeltext, objname,
572 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
573 } else {
574 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
575 " level %s after %s a level-%s %s\n",
576 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
577 p->p_comm, subjtext, actionname, objlabeltext, objname);
578 }
579
580 sbuf_delete(&subjlabel_sb);
581 sbuf_delete(&subjtext_sb);
582 sbuf_delete(&objlabel_sb);
583
584 return (0);
585}
586
587/*
588 * Relabel "to" to "from" only if "from" is a valid label (contains at least
589 * a single), as for a relabel operation which may or may not involve a
590 * relevant label.
591 */
592static void
593try_relabel(struct mac_lomac *from, struct mac_lomac *to)
594{
595
596 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
597 bzero(to, sizeof(*to));
598 lomac_copy(from, to);
599 }
600}
601
602/*
603 * Policy module operations.
604 */
605static void
606lomac_init(struct mac_policy_conf *conf)
607{
608
609}
610
611/*
612 * Label operations.
613 */
614static void
615lomac_init_label(struct label *label)
616{
617
618 SLOT_SET(label, lomac_alloc(M_WAITOK));
619}
620
621static int
622lomac_init_label_waitcheck(struct label *label, int flag)
623{
624
625 SLOT_SET(label, lomac_alloc(flag));
626 if (SLOT(label) == NULL)
627 return (ENOMEM);
628
629 return (0);
630}
631
632static void
633lomac_destroy_label(struct label *label)
634{
635
636 lomac_free(SLOT(label));
637 SLOT_SET(label, NULL);
638}
639
640static int
641lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
642{
643
644 switch (element->mle_type) {
645 case MAC_LOMAC_TYPE_HIGH:
646 return (sbuf_printf(sb, "high"));
647
648 case MAC_LOMAC_TYPE_LOW:
649 return (sbuf_printf(sb, "low"));
650
651 case MAC_LOMAC_TYPE_EQUAL:
652 return (sbuf_printf(sb, "equal"));
653
654 case MAC_LOMAC_TYPE_GRADE:
655 return (sbuf_printf(sb, "%d", element->mle_grade));
656
657 default:
658 panic("lomac_element_to_string: invalid type (%d)",
659 element->mle_type);
660 }
661}
662
663static int
664lomac_to_string(struct sbuf *sb, struct mac_lomac *ml)
665{
666
667 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
668 if (lomac_element_to_string(sb, &ml->ml_single) == -1)
669 return (EINVAL);
670 }
671
672 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
673 if (sbuf_putc(sb, '[') == -1)
674 return (EINVAL);
675
676 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1)
677 return (EINVAL);
678
679 if (sbuf_putc(sb, ']') == -1)
680 return (EINVAL);
681 }
682
683 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
684 if (sbuf_putc(sb, '(') == -1)
685 return (EINVAL);
686
687 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1)
688 return (EINVAL);
689
690 if (sbuf_putc(sb, '-') == -1)
691 return (EINVAL);
692
693 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1)
694 return (EINVAL);
695
696 if (sbuf_putc(sb, ')') == -1)
697 return (EINVAL);
698 }
699
700 return (0);
701}
702
703static int
704lomac_externalize_label(struct label *label, char *element_name,
705 struct sbuf *sb, int *claimed)
706{
707 struct mac_lomac *ml;
708
709 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
710 return (0);
711
712 (*claimed)++;
713
714 ml = SLOT(label);
715
716 return (lomac_to_string(sb, ml));
717}
718
719static int
720lomac_parse_element(struct mac_lomac_element *element, char *string)
721{
722
723 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
724 element->mle_type = MAC_LOMAC_TYPE_HIGH;
725 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
726 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
727 element->mle_type = MAC_LOMAC_TYPE_LOW;
728 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
729 } else if (strcmp(string, "equal") == 0 ||
730 strcmp(string, "eq") == 0) {
731 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
732 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
733 } else {
734 char *p0, *p1;
735 int d;
736
737 p0 = string;
738 d = strtol(p0, &p1, 10);
739
740 if (d < 0 || d > 65535)
741 return (EINVAL);
742 element->mle_type = MAC_LOMAC_TYPE_GRADE;
743 element->mle_grade = d;
744
745 if (p1 == p0 || *p1 != '\0')
746 return (EINVAL);
747 }
748
749 return (0);
750}
751
752/*
753 * Note: destructively consumes the string, make a local copy before calling
754 * if that's a problem.
755 */
756static int
757lomac_parse(struct mac_lomac *ml, char *string)
758{
759 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
760 *auxsingleend;
761 int error;
762
763 /* Do we have a range? */
764 single = string;
765 range = index(string, '(');
766 if (range == single)
767 single = NULL;
768 auxsingle = index(string, '[');
769 if (auxsingle == single)
770 single = NULL;
771 if (range != NULL && auxsingle != NULL)
772 return (EINVAL);
773 rangelow = rangehigh = NULL;
774 if (range != NULL) {
775 /* Nul terminate the end of the single string. */
776 *range = '\0';
777 range++;
778 rangelow = range;
779 rangehigh = index(rangelow, '-');
780 if (rangehigh == NULL)
781 return (EINVAL);
782 rangehigh++;
783 if (*rangelow == '\0' || *rangehigh == '\0')
784 return (EINVAL);
785 rangeend = index(rangehigh, ')');
786 if (rangeend == NULL)
787 return (EINVAL);
788 if (*(rangeend + 1) != '\0')
789 return (EINVAL);
790 /* Nul terminate the ends of the ranges. */
791 *(rangehigh - 1) = '\0';
792 *rangeend = '\0';
793 }
794 KASSERT((rangelow != NULL && rangehigh != NULL) ||
795 (rangelow == NULL && rangehigh == NULL),
796 ("lomac_internalize_label: range mismatch"));
797 if (auxsingle != NULL) {
798 /* Nul terminate the end of the single string. */
799 *auxsingle = '\0';
800 auxsingle++;
801 auxsingleend = index(auxsingle, ']');
802 if (auxsingleend == NULL)
803 return (EINVAL);
804 if (*(auxsingleend + 1) != '\0')
805 return (EINVAL);
806 /* Nul terminate the end of the auxsingle. */
807 *auxsingleend = '\0';
808 }
809
810 bzero(ml, sizeof(*ml));
811 if (single != NULL) {
812 error = lomac_parse_element(&ml->ml_single, single);
813 if (error)
814 return (error);
815 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
816 }
817
818 if (auxsingle != NULL) {
819 error = lomac_parse_element(&ml->ml_auxsingle, auxsingle);
820 if (error)
821 return (error);
822 ml->ml_flags |= MAC_LOMAC_FLAG_AUX;
823 }
824
825 if (rangelow != NULL) {
826 error = lomac_parse_element(&ml->ml_rangelow, rangelow);
827 if (error)
828 return (error);
829 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh);
830 if (error)
831 return (error);
832 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
833 }
834
835 error = lomac_valid(ml);
836 if (error)
837 return (error);
838
839 return (0);
840}
841
842static int
843lomac_internalize_label(struct label *label, char *element_name,
844 char *element_data, int *claimed)
845{
846 struct mac_lomac *ml, ml_temp;
847 int error;
848
849 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
850 return (0);
851
852 (*claimed)++;
853
854 error = lomac_parse(&ml_temp, element_data);
855 if (error)
856 return (error);
857
858 ml = SLOT(label);
859 *ml = ml_temp;
860
861 return (0);
862}
863
864static void
865lomac_copy_label(struct label *src, struct label *dest)
866{
867
868 *SLOT(dest) = *SLOT(src);
869}
870
871/*
872 * Object-specific entry point implementations are sorted alphabetically by
873 * object type name and then by operation.
874 */
875static int
876lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
877 struct ifnet *ifp, struct label *ifplabel)
878{
879 struct mac_lomac *a, *b;
880
881 if (!lomac_enabled)
882 return (0);
883
884 a = SLOT(dlabel);
885 b = SLOT(ifplabel);
886
887 if (lomac_equal_single(a, b))
888 return (0);
889 return (EACCES);
890}
891
892static void
893lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
894 struct label *dlabel)
895{
896 struct mac_lomac *source, *dest;
897
898 source = SLOT(cred->cr_label);
899 dest = SLOT(dlabel);
900
901 lomac_copy_single(source, dest);
902}
903
904static void
905lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
906 struct mbuf *m, struct label *mlabel)
907{
908 struct mac_lomac *source, *dest;
909
910 source = SLOT(dlabel);
911 dest = SLOT(mlabel);
912
913 lomac_copy_single(source, dest);
914}
915
916static int
917lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
918{
919 struct mac_lomac *subj, *new;
920 int error;
921
922 subj = SLOT(cred->cr_label);
923 new = SLOT(newlabel);
924
925 /*
926 * If there is a LOMAC label update for the credential, it may be an
927 * update of the single, range, or both.
928 */
929 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
930 if (error)
931 return (error);
932
933 /*
934 * If the LOMAC label is to be changed, authorize as appropriate.
935 */
936 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
937 /*
938 * Fill in the missing parts from the previous label.
939 */
940 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
941 lomac_copy_single(subj, new);
942 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
943 lomac_copy_range(subj, new);
944
945 /*
946 * To change the LOMAC range on a credential, the new range
947 * label must be in the current range.
948 */
949 if (!lomac_range_in_range(new, subj))
950 return (EPERM);
951
952 /*
953 * To change the LOMAC single label on a credential, the new
954 * single label must be in the new range. Implicitly from
955 * the previous check, the new single is in the old range.
956 */
957 if (!lomac_single_in_range(new, new))
958 return (EPERM);
959
960 /*
961 * To have EQUAL in any component of the new credential LOMAC
962 * label, the subject must already have EQUAL in their label.
963 */
964 if (lomac_contains_equal(new)) {
965 error = lomac_subject_privileged(subj);
966 if (error)
967 return (error);
968 }
969
970 /*
971 * XXXMAC: Additional consistency tests regarding the single
972 * and range of the new label might be performed here.
973 */
974 }
975
976 return (0);
977}
978
979static int
980lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
981{
982 struct mac_lomac *subj, *obj;
983
984 if (!lomac_enabled)
985 return (0);
986
987 subj = SLOT(cr1->cr_label);
988 obj = SLOT(cr2->cr_label);
989
990 /* XXX: range */
991 if (!lomac_dominate_single(obj, subj))
992 return (ESRCH);
993
994 return (0);
995}
996
997static void
998lomac_cred_create_init(struct ucred *cred)
999{
1000 struct mac_lomac *dest;
1001
1002 dest = SLOT(cred->cr_label);
1003
1004 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
1005 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1006}
1007
1008static void
1009lomac_cred_create_swapper(struct ucred *cred)
1010{
1011 struct mac_lomac *dest;
1012
1013 dest = SLOT(cred->cr_label);
1014
1015 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1016 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1017}
1018
1019static void
1020lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
1021{
1022 struct mac_lomac *source, *dest;
1023
1024 source = SLOT(newlabel);
1025 dest = SLOT(cred->cr_label);
1026
1027 try_relabel(source, dest);
1028}
1029
1030static void
1031lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
1032 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
1033{
1034 struct mac_lomac *ml;
1035 const char *dn;
1036 int lomac_type;
1037
1038 ml = SLOT(delabel);
1039 dn = devtoname(dev);
1040 if (strcmp(dn, "null") == 0 ||
1041 strcmp(dn, "zero") == 0 ||
1042 strcmp(dn, "random") == 0 ||
1043 strncmp(dn, "fd/", strlen("fd/")) == 0 ||
1044 strncmp(dn, "ttyv", strlen("ttyv")) == 0)
1045 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1046 else if (ptys_equal &&
1047 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
1048 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
1049 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
1050 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1051 else
1052 lomac_type = MAC_LOMAC_TYPE_HIGH;
1053 lomac_set_single(ml, lomac_type, 0);
1054}
1055
1056static void
1057lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
1058 struct devfs_dirent *de, struct label *delabel)
1059{
1060 struct mac_lomac *ml;
1061
1062 ml = SLOT(delabel);
1063 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
1064}
1065
1066static void
1067lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
1068 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
1069 struct label *delabel)
1070{
1071 struct mac_lomac *source, *dest;
1072
1073 source = SLOT(cred->cr_label);
1074 dest = SLOT(delabel);
1075
1076 lomac_copy_single(source, dest);
1077}
1078
1079static void
1080lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
1081 struct label *delabel, struct vnode *vp, struct label *vplabel)
1082{
1083 struct mac_lomac *source, *dest;
1084
1085 source = SLOT(vplabel);
1086 dest = SLOT(delabel);
1087
1088 lomac_copy(source, dest);
1089}
1090
1091static void
1092lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
1093 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1094 struct label *vplabel)
1095{
1096 struct mac_lomac *source, *dest;
1097
1098 source = SLOT(delabel);
1099 dest = SLOT(vplabel);
1100
1101 lomac_copy_single(source, dest);
1102}
1103
1104static int
1105lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1106 struct label *ifplabel, struct label *newlabel)
1107{
1108 struct mac_lomac *subj, *new;
1109 int error;
1110
1111 subj = SLOT(cred->cr_label);
1112 new = SLOT(newlabel);
1113
1114 /*
1115 * If there is a LOMAC label update for the interface, it may be an
1116 * update of the single, range, or both.
1117 */
1118 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1119 if (error)
1120 return (error);
1121
1122 /*
1123 * Relabling network interfaces requires LOMAC privilege.
1124 */
1125 error = lomac_subject_privileged(subj);
1126 if (error)
1127 return (error);
1128
1129 /*
1130 * If the LOMAC label is to be changed, authorize as appropriate.
1131 */
1132 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1133 /*
1134 * Fill in the missing parts from the previous label.
1135 */
1136 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1137 lomac_copy_single(subj, new);
1138 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1139 lomac_copy_range(subj, new);
1140
1141 /*
1142 * Rely on the traditional superuser status for the LOMAC
1143 * interface relabel requirements. XXXMAC: This will go
1144 * away.
1145 *
1146 * XXXRW: This is also redundant to a higher layer check.
1147 */
1148 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
1149 if (error)
1150 return (EPERM);
1151
1152 /*
1153 * XXXMAC: Additional consistency tests regarding the single
1154 * and the range of the new label might be performed here.
1155 */
1156 }
1157
1158 return (0);
1159}
1160
1161static int
1162lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1163 struct mbuf *m, struct label *mlabel)
1164{
1165 struct mac_lomac *p, *i;
1166
1167 if (!lomac_enabled)
1168 return (0);
1169
1170 p = SLOT(mlabel);
1171 i = SLOT(ifplabel);
1172
1173 return (lomac_single_in_range(p, i) ? 0 : EACCES);
1174}
1175
1176static void
1177lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1178{
1179 char tifname[IFNAMSIZ], *p, *q;
1180 char tiflist[sizeof(trusted_interfaces)];
1181 struct mac_lomac *dest;
1182 int len, grade;
1183
1184 dest = SLOT(ifplabel);
1185
1186 if (ifp->if_type == IFT_LOOP) {
1187 grade = MAC_LOMAC_TYPE_EQUAL;
1188 goto set;
1189 }
1190
1191 if (trust_all_interfaces) {
1192 grade = MAC_LOMAC_TYPE_HIGH;
1193 goto set;
1194 }
1195
1196 grade = MAC_LOMAC_TYPE_LOW;
1197
1198 if (trusted_interfaces[0] == '\0' ||
1199 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1200 goto set;
1201
1202 bzero(tiflist, sizeof(tiflist));
1203 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1204 if(*p != ' ' && *p != '\t')
1205 *q = *p;
1206
1207 for (p = q = tiflist;; p++) {
1208 if (*p == ',' || *p == '\0') {
1209 len = p - q;
1210 if (len < IFNAMSIZ) {
1211 bzero(tifname, sizeof(tifname));
1212 bcopy(q, tifname, len);
1213 if (strcmp(tifname, ifp->if_xname) == 0) {
1214 grade = MAC_LOMAC_TYPE_HIGH;
1215 break;
1216 }
1217 }
1218 else {
1219 *p = '\0';
1220 printf("MAC/LOMAC warning: interface name "
1221 "\"%s\" is too long (must be < %d)\n",
1222 q, IFNAMSIZ);
1223 }
1224 if (*p == '\0')
1225 break;
1226 q = p + 1;
1227 }
1228 }
1229set:
1230 lomac_set_single(dest, grade, 0);
1231 lomac_set_range(dest, grade, 0, grade, 0);
1232}
1233
1234static void
1235lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1236 struct mbuf *m, struct label *mlabel)
1237{
1238 struct mac_lomac *source, *dest;
1239
1240 source = SLOT(ifplabel);
1241 dest = SLOT(mlabel);
1242
1243 lomac_copy_single(source, dest);
1244}
1245
1246static void
1247lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1248 struct label *ifplabel, struct label *newlabel)
1249{
1250 struct mac_lomac *source, *dest;
1251
1252 source = SLOT(newlabel);
1253 dest = SLOT(ifplabel);
1254
1255 try_relabel(source, dest);
1256}
1257
1258static int
1259lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1260 struct mbuf *m, struct label *mlabel)
1261{
1262 struct mac_lomac *p, *i;
1263
1264 if (!lomac_enabled)
1265 return (0);
1266
1267 p = SLOT(mlabel);
1268 i = SLOT(inplabel);
1269
1270 return (lomac_equal_single(p, i) ? 0 : EACCES);
1271}
1272
1273static int
1274lomac_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1275 struct label *inplabel)
1276{
1277 struct mac_lomac *subj, *obj;
1278
1279 if (!lomac_enabled)
1280 return (0);
1281
1282 subj = SLOT(cred->cr_label);
1283 obj = SLOT(inplabel);
1284
1285 if (!lomac_dominate_single(obj, subj))
1286 return (ENOENT);
1287
1288 return (0);
1289}
1290
1291static void
1292lomac_inpcb_create(struct socket *so, struct label *solabel,
1293 struct inpcb *inp, struct label *inplabel)
1294{
1295 struct mac_lomac *source, *dest;
1296
1297 source = SLOT(solabel);
1298 dest = SLOT(inplabel);
1299
1300 lomac_copy_single(source, dest);
1301}
1302
1303static void
1304lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1305 struct mbuf *m, struct label *mlabel)
1306{
1307 struct mac_lomac *source, *dest;
1308
1309 source = SLOT(inplabel);
1310 dest = SLOT(mlabel);
1311
1312 lomac_copy_single(source, dest);
1313}
1314
1315static void
1316lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1317 struct inpcb *inp, struct label *inplabel)
1318{
1319 struct mac_lomac *source, *dest;
1320
1321 SOCK_LOCK_ASSERT(so);
1322
1323 source = SLOT(solabel);
1324 dest = SLOT(inplabel);
1325
1326 lomac_copy_single(source, dest);
1327}
1328
1329static void
1330lomac_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1331 struct label *q6label)
1332{
1333 struct mac_lomac *source, *dest;
1334
1335 source = SLOT(mlabel);
1336 dest = SLOT(q6label);
1337
1338 lomac_copy_single(source, dest);
1339}
1340
1341static int
1342lomac_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1343 struct label *q6label)
1344{
1345 struct mac_lomac *a, *b;
1346
1347 a = SLOT(q6label);
1348 b = SLOT(mlabel);
1349
1350 return (lomac_equal_single(a, b));
1351}
1352
1353static void
1354lomac_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1355 struct label *mlabel)
1356{
1357 struct mac_lomac *source, *dest;
1358
1359 source = SLOT(q6label);
1360 dest = SLOT(mlabel);
1361
1362 /* Just use the head, since we require them all to match. */
1363 lomac_copy_single(source, dest);
1364}
1365
1366static void
1367lomac_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1368 struct label *q6label)
1369{
1370
1371 /* NOOP: we only accept matching labels, so no need to update */
1372}
1373
1374static void
1375lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1376 struct label *qlabel)
1377{
1378 struct mac_lomac *source, *dest;
1379
1380 source = SLOT(mlabel);
1381 dest = SLOT(qlabel);
1382
1383 lomac_copy_single(source, dest);
1384}
1385
1386static int
1387lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1388 struct label *qlabel)
1389{
1390 struct mac_lomac *a, *b;
1391
1392 a = SLOT(qlabel);
1393 b = SLOT(mlabel);
1394
1395 return (lomac_equal_single(a, b));
1396}
1397
1398static void
1399lomac_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1400 struct label *mlabel)
1401{
1402 struct mac_lomac *source, *dest;
1403
1404 source = SLOT(qlabel);
1405 dest = SLOT(mlabel);
1406
1407 /* Just use the head, since we require them all to match. */
1408 lomac_copy_single(source, dest);
1409}
1410
1411static void
1412lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1413 struct label *qlabel)
1414{
1415
1416 /* NOOP: we only accept matching labels, so no need to update */
1417}
1418
1419static int
1420lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
1421 struct label *vplabel)
1422{
1423 struct mac_lomac *subj, *obj;
1424
1425 if (!lomac_enabled)
1426 return (0);
1427
1428 subj = SLOT(cred->cr_label);
1429 obj = SLOT(vplabel);
1430
1431 if (lomac_subject_privileged(subj))
1432 return (EPERM);
1433
1434 if (!lomac_high_single(obj))
1435 return (EACCES);
1436
1437 return (0);
1438}
1439
1440static void
1441lomac_mount_create(struct ucred *cred, struct mount *mp,
1442 struct label *mplabel)
1443{
1444 struct mac_lomac *source, *dest;
1445
1446 source = SLOT(cred->cr_label);
1447 dest = SLOT(mplabel);
1448 lomac_copy_single(source, dest);
1449}
1450
1451static void
1452lomac_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel,
1453 struct mbuf *m, struct label *mlabel)
1454{
1455 struct mac_lomac *dest;
1456
1457 dest = SLOT(mlabel);
1458
1459 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1460}
1461
1462static void
1463lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1464 struct mbuf *m, struct label *mlabel)
1465{
1466 struct mac_lomac *dest;
1467
1468 dest = SLOT(mlabel);
1469
1470 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1471}
1472
1473static void
1474lomac_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1475 struct mbuf *msend, struct label *msendlabel)
1476{
1477 struct mac_lomac *source, *dest;
1478
1479 source = SLOT(mrecvlabel);
1480 dest = SLOT(msendlabel);
1481
1482 lomac_copy_single(source, dest);
1483}
1484
1485static void
1486lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1487{
1488 struct mac_lomac *dest;
1489
1490 dest = SLOT(mlabel);
1491
1492 /* XXX: where is the label for the firewall really comming from? */
1493 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1494}
1495
1496static void
1497lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
1498 struct mbuf *frag, struct label *fraglabel)
1499{
1500 struct mac_lomac *source, *dest;
1501
1502 source = SLOT(mlabel);
1503 dest = SLOT(fraglabel);
1504
1505 lomac_copy_single(source, dest);
1506}
1507
1508static void
1509lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1510 struct mbuf *msend, struct label *msendlabel)
1511{
1512 struct mac_lomac *source, *dest;
1513
1514 source = SLOT(mrecvlabel);
1515 dest = SLOT(msendlabel);
1516
1517 lomac_copy_single(source, dest);
1518}
1519
1520static void
1521lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1522 struct mbuf *m, struct label *mlabel)
1523{
1524 struct mac_lomac *dest;
1525
1526 dest = SLOT(mlabel);
1527
1528 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1529}
1530
1531static void
1532lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1533 struct mbuf *m, struct label *mlabel)
1534{
1535 struct mac_lomac *dest;
1536
1537 dest = SLOT(mlabel);
1538
1539 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1540}
1541
1542static int
1543lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1544 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1545{
1546
1547 if (!lomac_enabled)
1548 return (0);
1549
1550 /* XXX: This will be implemented soon... */
1551
1552 return (0);
1553}
1554
1555static int
1556lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1557 struct label *pplabel)
1558{
1559 struct mac_lomac *subj, *obj;
1560
1561 if (!lomac_enabled)
1562 return (0);
1563
1564 subj = SLOT(cred->cr_label);
1565 obj = SLOT(pplabel);
1566
1567 if (!lomac_dominate_single(obj, subj))
1568 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1569
1570 return (0);
1571}
1572
1573static int
1574lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1575 struct label *pplabel, struct label *newlabel)
1576{
1577 struct mac_lomac *subj, *obj, *new;
1578 int error;
1579
1580 new = SLOT(newlabel);
1581 subj = SLOT(cred->cr_label);
1582 obj = SLOT(pplabel);
1583
1584 /*
1585 * If there is a LOMAC label update for a pipe, it must be a single
1586 * update.
1587 */
1588 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1589 if (error)
1590 return (error);
1591
1592 /*
1593 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1594 * authorize the relabel.
1595 */
1596 if (!lomac_single_in_range(obj, subj))
1597 return (EPERM);
1598
1599 /*
1600 * If the LOMAC label is to be changed, authorize as appropriate.
1601 */
1602 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1603 /*
1604 * To change the LOMAC label on a pipe, the new pipe label
1605 * must be in the subject range.
1606 */
1607 if (!lomac_single_in_range(new, subj))
1608 return (EPERM);
1609
1610 /*
1611 * To change the LOMAC label on a pipe to be EQUAL, the
1612 * subject must have appropriate privilege.
1613 */
1614 if (lomac_contains_equal(new)) {
1615 error = lomac_subject_privileged(subj);
1616 if (error)
1617 return (error);
1618 }
1619 }
1620
1621 return (0);
1622}
1623
1624static int
1625lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1626 struct label *pplabel)
1627{
1628 struct mac_lomac *subj, *obj;
1629
1630 if (!lomac_enabled)
1631 return (0);
1632
1633 subj = SLOT(cred->cr_label);
1634 obj = SLOT(pplabel);
1635
1636 if (!lomac_subject_dominate(subj, obj))
1637 return (EACCES);
1638
1639 return (0);
1640}
1641
1642static void
1643lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
1644 struct label *pplabel)
1645{
1646 struct mac_lomac *source, *dest;
1647
1648 source = SLOT(cred->cr_label);
1649 dest = SLOT(pplabel);
1650
1651 lomac_copy_single(source, dest);
1652}
1653
1654static void
1655lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1656 struct label *pplabel, struct label *newlabel)
1657{
1658 struct mac_lomac *source, *dest;
1659
1660 source = SLOT(newlabel);
1661 dest = SLOT(pplabel);
1662
1663 try_relabel(source, dest);
1664}
1665
1666/*
1667 * Some system privileges are allowed regardless of integrity grade; others
1668 * are allowed only when running with privilege with respect to the LOMAC
1669 * policy as they might otherwise allow bypassing of the integrity policy.
1670 */
1671static int
1672lomac_priv_check(struct ucred *cred, int priv)
1673{
1674 struct mac_lomac *subj;
1675 int error;
1676
1677 if (!lomac_enabled)
1678 return (0);
1679
1680 /*
1681 * Exempt only specific privileges from the LOMAC integrity policy.
1682 */
1683 switch (priv) {
1684 case PRIV_KTRACE:
1685 case PRIV_MSGBUF:
1686
1687 /*
1688 * Allow processes to manipulate basic process audit properties, and
1689 * to submit audit records.
1690 */
1691 case PRIV_AUDIT_GETAUDIT:
1692 case PRIV_AUDIT_SETAUDIT:
1693 case PRIV_AUDIT_SUBMIT:
1694
1695 /*
1696 * Allow processes to manipulate their regular UNIX credentials.
1697 */
1698 case PRIV_CRED_SETUID:
1699 case PRIV_CRED_SETEUID:
1700 case PRIV_CRED_SETGID:
1701 case PRIV_CRED_SETEGID:
1702 case PRIV_CRED_SETGROUPS:
1703 case PRIV_CRED_SETREUID:
1704 case PRIV_CRED_SETREGID:
1705 case PRIV_CRED_SETRESUID:
1706 case PRIV_CRED_SETRESGID:
1707
1708 /*
1709 * Allow processes to perform system monitoring.
1710 */
1711 case PRIV_SEEOTHERGIDS:
1712 case PRIV_SEEOTHERUIDS:
1713 break;
1714
1715 /*
1716 * Allow access to general process debugging facilities. We
1717 * separately control debugging based on MAC label.
1718 */
1719 case PRIV_DEBUG_DIFFCRED:
1720 case PRIV_DEBUG_SUGID:
1721 case PRIV_DEBUG_UNPRIV:
1722
1723 /*
1724 * Allow manipulating jails.
1725 */
1726 case PRIV_JAIL_ATTACH:
1727
1728 /*
1729 * Allow privilege with respect to the Partition policy, but not the
1730 * Privs policy.
1731 */
1732 case PRIV_MAC_PARTITION:
1733
1734 /*
1735 * Allow privilege with respect to process resource limits and login
1736 * context.
1737 */
1738 case PRIV_PROC_LIMIT:
1739 case PRIV_PROC_SETLOGIN:
1740 case PRIV_PROC_SETRLIMIT:
1741
1742 /*
1743 * Allow System V and POSIX IPC privileges.
1744 */
1745 case PRIV_IPC_READ:
1746 case PRIV_IPC_WRITE:
1747 case PRIV_IPC_ADMIN:
1748 case PRIV_IPC_MSGSIZE:
1749 case PRIV_MQ_ADMIN:
1750
1751 /*
1752 * Allow certain scheduler manipulations -- possibly this should be
1753 * controlled by more fine-grained policy, as potentially low
1754 * integrity processes can deny CPU to higher integrity ones.
1755 */
1756 case PRIV_SCHED_DIFFCRED:
1757 case PRIV_SCHED_SETPRIORITY:
1758 case PRIV_SCHED_RTPRIO:
1759 case PRIV_SCHED_SETPOLICY:
1760 case PRIV_SCHED_SET:
1761 case PRIV_SCHED_SETPARAM:
1762
1763 /*
1764 * More IPC privileges.
1765 */
1766 case PRIV_SEM_WRITE:
1767
1768 /*
1769 * Allow signaling privileges subject to integrity policy.
1770 */
1771 case PRIV_SIGNAL_DIFFCRED:
1772 case PRIV_SIGNAL_SUGID:
1773
1774 /*
1775 * Allow access to only limited sysctls from lower integrity levels;
1776 * piggy-back on the Jail definition.
1777 */
1778 case PRIV_SYSCTL_WRITEJAIL:
1779
1780 /*
1781 * Allow TTY-based privileges, subject to general device access using
1782 * labels on TTY device nodes, but not console privilege.
1783 */
1784 case PRIV_TTY_DRAINWAIT:
1785 case PRIV_TTY_DTRWAIT:
1786 case PRIV_TTY_EXCLUSIVE:
1787 case PRIV_TTY_STI:
1788 case PRIV_TTY_SETA:
1789
1790 /*
1791 * Grant most VFS privileges, as almost all are in practice bounded
1792 * by more specific checks using labels.
1793 */
1794 case PRIV_VFS_READ:
1795 case PRIV_VFS_WRITE:
1796 case PRIV_VFS_ADMIN:
1797 case PRIV_VFS_EXEC:
1798 case PRIV_VFS_LOOKUP:
1799 case PRIV_VFS_CHFLAGS_DEV:
1800 case PRIV_VFS_CHOWN:
1801 case PRIV_VFS_CHROOT:
1802 case PRIV_VFS_RETAINSUGID:
1803 case PRIV_VFS_EXCEEDQUOTA:
1804 case PRIV_VFS_FCHROOT:
1805 case PRIV_VFS_FHOPEN:
1806 case PRIV_VFS_FHSTATFS:
1807 case PRIV_VFS_GENERATION:
1808 case PRIV_VFS_GETFH:
1809 case PRIV_VFS_GETQUOTA:
1810 case PRIV_VFS_LINK:
1811 case PRIV_VFS_MOUNT:
1812 case PRIV_VFS_MOUNT_OWNER:
1813 case PRIV_VFS_MOUNT_PERM:
1814 case PRIV_VFS_MOUNT_SUIDDIR:
1815 case PRIV_VFS_MOUNT_NONUSER:
1816 case PRIV_VFS_SETGID:
1817 case PRIV_VFS_STICKYFILE:
1818 case PRIV_VFS_SYSFLAGS:
1819 case PRIV_VFS_UNMOUNT:
1820
1821 /*
1822 * Allow VM privileges; it would be nice if these were subject to
1823 * resource limits.
1824 */
1825 case PRIV_VM_MADV_PROTECT:
1826 case PRIV_VM_MLOCK:
1827 case PRIV_VM_MUNLOCK:
1828 case PRIV_VM_SWAP_NOQUOTA:
1829 case PRIV_VM_SWAP_NORLIMIT:
1830
1831 /*
1832 * Allow some but not all network privileges. In general, dont allow
1833 * reconfiguring the network stack, just normal use.
1834 */
1835 case PRIV_NETATALK_RESERVEDPORT:
1836 case PRIV_NETINET_RESERVEDPORT:
1837 case PRIV_NETINET_RAW:
1838 case PRIV_NETINET_REUSEPORT:
1839 case PRIV_NETIPX_RESERVEDPORT:
1840 case PRIV_NETIPX_RAW:
1841 break;
1842
1843 /*
1844 * All remaining system privileges are allow only if the process
1845 * holds privilege with respect to the LOMAC policy.
1846 */
1847 default:
1848 subj = SLOT(cred->cr_label);
1849 error = lomac_subject_privileged(subj);
1850 if (error)
1851 return (error);
1852 }
1853 return (0);
1854}
1855
1856static int
1857lomac_proc_check_debug(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
1876static int
1877lomac_proc_check_sched(struct ucred *cred, struct proc *p)
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
1896static int
1897lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
1898{
1899 struct mac_lomac *subj, *obj;
1900
1901 if (!lomac_enabled)
1902 return (0);
1903
1904 subj = SLOT(cred->cr_label);
1905 obj = SLOT(p->p_ucred->cr_label);
1906
1907 /* XXX: range checks */
1908 if (!lomac_dominate_single(obj, subj))
1909 return (ESRCH);
1910 if (!lomac_subject_dominate(subj, obj))
1911 return (EACCES);
1912
1913 return (0);
1914}
1915
1916static void
1917lomac_proc_destroy_label(struct label *label)
1918{
1919
1920 mtx_destroy(&PSLOT(label)->mtx);
1921 free(PSLOT(label), M_LOMAC);
1922 PSLOT_SET(label, NULL);
1923}
1924
1925static void
1926lomac_proc_init_label(struct label *label)
1927{
1928
1929 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
1930 M_ZERO | M_WAITOK));
1931 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
1932}
1933
1934static int
1935lomac_socket_check_deliver(struct socket *so, struct label *solabel,
1936 struct mbuf *m, struct label *mlabel)
1937{
1938 struct mac_lomac *p, *s;
1939 int error;
1940
1941 if (!lomac_enabled)
1942 return (0);
1943
1944 p = SLOT(mlabel);
1945 s = SLOT(solabel);
1946
1947 SOCK_LOCK(so);
1948 error = lomac_equal_single(p, s) ? 0 : EACCES;
1949 SOCK_UNLOCK(so);
1950 return (error);
1951}
1952
1953static int
1954lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
1955 struct label *solabel, struct label *newlabel)
1956{
1957 struct mac_lomac *subj, *obj, *new;
1958 int error;
1959
1960 SOCK_LOCK_ASSERT(so);
1961
1962 new = SLOT(newlabel);
1963 subj = SLOT(cred->cr_label);
1964 obj = SLOT(solabel);
1965
1966 /*
1967 * If there is a LOMAC label update for the socket, it may be an
1968 * update of single.
1969 */
1970 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1971 if (error)
1972 return (error);
1973
1974 /*
1975 * To relabel a socket, the old socket single must be in the subject
1976 * range.
1977 */
1978 if (!lomac_single_in_range(obj, subj))
1979 return (EPERM);
1980
1981 /*
1982 * If the LOMAC label is to be changed, authorize as appropriate.
1983 */
1984 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1985 /*
1986 * To relabel a socket, the new socket single must be in the
1987 * subject range.
1988 */
1989 if (!lomac_single_in_range(new, subj))
1990 return (EPERM);
1991
1992 /*
1993 * To change the LOMAC label on the socket to contain EQUAL,
1994 * the subject must have appropriate privilege.
1995 */
1996 if (lomac_contains_equal(new)) {
1997 error = lomac_subject_privileged(subj);
1998 if (error)
1999 return (error);
2000 }
2001 }
2002
2003 return (0);
2004}
2005
2006static int
2007lomac_socket_check_visible(struct ucred *cred, struct socket *so,
2008 struct label *solabel)
2009{
2010 struct mac_lomac *subj, *obj;
2011
2012 if (!lomac_enabled)
2013 return (0);
2014
2015 subj = SLOT(cred->cr_label);
2016 obj = SLOT(solabel);
2017
2018 SOCK_LOCK(so);
2019 if (!lomac_dominate_single(obj, subj)) {
2020 SOCK_UNLOCK(so);
2021 return (ENOENT);
2022 }
2023 SOCK_UNLOCK(so);
2024
2025 return (0);
2026}
2027
2028static void
2029lomac_socket_create(struct ucred *cred, struct socket *so,
2030 struct label *solabel)
2031{
2032 struct mac_lomac *source, *dest;
2033
2034 source = SLOT(cred->cr_label);
2035 dest = SLOT(solabel);
2036
2037 lomac_copy_single(source, dest);
2038}
2039
2040static void
2041lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
2042 struct mbuf *m, struct label *mlabel)
2043{
2044 struct mac_lomac *source, *dest;
2045
2046 source = SLOT(solabel);
2047 dest = SLOT(mlabel);
2048
2049 SOCK_LOCK(so);
2050 lomac_copy_single(source, dest);
2051 SOCK_UNLOCK(so);
2052}
2053
2054static void
2055lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2056 struct socket *newso, struct label *newsolabel)
2057{
2058 struct mac_lomac source, *dest;
2059
2060 SOCK_LOCK(oldso);
2061 source = *SLOT(oldsolabel);
2062 SOCK_UNLOCK(oldso);
2063
2064 dest = SLOT(newsolabel);
2065
2066 SOCK_LOCK(newso);
2067 lomac_copy_single(&source, dest);
2068 SOCK_UNLOCK(newso);
2069}
2070
2071static void
2072lomac_socket_relabel(struct ucred *cred, struct socket *so,
2073 struct label *solabel, struct label *newlabel)
2074{
2075 struct mac_lomac *source, *dest;
2076
2077 SOCK_LOCK_ASSERT(so);
2078
2079 source = SLOT(newlabel);
2080 dest = SLOT(solabel);
2081
2082 try_relabel(source, dest);
2083}
2084
2085static void
2086lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2087 struct socket *so, struct label *sopeerlabel)
2088{
2089 struct mac_lomac *source, *dest;
2090
2091 source = SLOT(mlabel);
2092 dest = SLOT(sopeerlabel);
2093
2094 SOCK_LOCK(so);
2095 lomac_copy_single(source, dest);
2096 SOCK_UNLOCK(so);
2097}
2098
2099static void
2100lomac_socketpeer_set_from_socket(struct socket *oldso,
2101 struct label *oldsolabel, struct socket *newso,
2102 struct label *newsopeerlabel)
2103{
2104 struct mac_lomac source, *dest;
2105
2106 SOCK_LOCK(oldso);
2107 source = *SLOT(oldsolabel);
2108 SOCK_UNLOCK(oldso);
2109
2110 dest = SLOT(newsopeerlabel);
2111
2112 SOCK_LOCK(newso);
2113 lomac_copy_single(&source, dest);
2114 SOCK_UNLOCK(newso);
2115}
2116
2117static void
2118lomac_syncache_create(struct label *label, struct inpcb *inp)
2119{
2120 struct mac_lomac *source, *dest;
2121
2122 source = SLOT(inp->inp_label);
2123 dest = SLOT(label);
2124 lomac_copy(source, dest);
2125}
2126
2127static void
2128lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2129 struct label *mlabel)
2130{
2131 struct mac_lomac *source, *dest;
2132
2133 source = SLOT(sc_label);
2134 dest = SLOT(mlabel);
2135 lomac_copy(source, dest);
2136}
2137
2138static int
2139lomac_system_check_acct(struct ucred *cred, struct vnode *vp,
2140 struct label *vplabel)
2141{
2142 struct mac_lomac *subj, *obj;
2143
2144 if (!lomac_enabled)
2145 return (0);
2146
2147 subj = SLOT(cred->cr_label);
2148 obj = SLOT(vplabel);
2149
2150 if (lomac_subject_privileged(subj))
2151 return (EPERM);
2152
2153 if (!lomac_high_single(obj))
2154 return (EACCES);
2155
2156 return (0);
2157}
2158
2159static int
2160lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2161 struct label *vplabel)
2162{
2163 struct mac_lomac *subj, *obj;
2164
2165 if (!lomac_enabled)
2166 return (0);
2167
2168 subj = SLOT(cred->cr_label);
2169 obj = SLOT(vplabel);
2170
2171 if (lomac_subject_privileged(subj))
2172 return (EPERM);
2173
2174 if (!lomac_high_single(obj))
2175 return (EACCES);
2176
2177 return (0);
2178}
2179
2180static int
2181lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2182 struct label *vplabel)
2183{
2184 struct mac_lomac *subj;
2185
2186 if (!lomac_enabled)
2187 return (0);
2188
2189 subj = SLOT(cred->cr_label);
2190
2191 if (lomac_subject_privileged(subj))
2192 return (EPERM);
2193
2194 return (0);
2195}
2196
2197static int
2198lomac_system_check_swapon(struct ucred *cred, struct vnode *vp,
2199 struct label *vplabel)
2200{
2201 struct mac_lomac *subj, *obj;
2202
2203 if (!lomac_enabled)
2204 return (0);
2205
2206 subj = SLOT(cred->cr_label);
2207 obj = SLOT(vplabel);
2208
2209 if (lomac_subject_privileged(subj))
2210 return (EPERM);
2211
2212 if (!lomac_high_single(obj))
2213 return (EACCES);
2214
2215 return (0);
2216}
2217
2218static int
2219lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2220 void *arg1, int arg2, struct sysctl_req *req)
2221{
2222 struct mac_lomac *subj;
2223
2224 if (!lomac_enabled)
2225 return (0);
2226
2227 subj = SLOT(cred->cr_label);
2228
2229 /*
2230 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high,
2231 * but also require privilege to change them.
2232 */
2233 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2234#ifdef notdef
2235 if (!lomac_subject_dominate_high(subj))
2236 return (EACCES);
2237#endif
2238
2239 if (lomac_subject_privileged(subj))
2240 return (EPERM);
2241 }
2242
2243 return (0);
2244}
2245
2246static void
2247lomac_thread_userret(struct thread *td)
2248{
2249 struct proc *p = td->td_proc;
2250 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2251 struct ucred *newcred, *oldcred;
2252 int dodrop;
2253
2254 mtx_lock(&subj->mtx);
2255 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2256 dodrop = 0;
2257 mtx_unlock(&subj->mtx);
2258 newcred = crget();
2259 /*
2260 * Prevent a lock order reversal in mac_proc_vm_revoke;
2261 * ideally, the other user of subj->mtx wouldn't be holding
2262 * Giant.
2263 */
2264 mtx_lock(&Giant);
2265 PROC_LOCK(p);
2266 mtx_lock(&subj->mtx);
2267 /*
2268 * Check if we lost the race while allocating the cred.
2269 */
2270 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2271 crfree(newcred);
2272 goto out;
2273 }
2274 oldcred = p->p_ucred;
2275 crcopy(newcred, oldcred);
2276 crhold(newcred);
2277 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2278 p->p_ucred = newcred;
2279 crfree(oldcred);
2280 dodrop = 1;
2281 out:
2282 mtx_unlock(&subj->mtx);
2283 PROC_UNLOCK(p);
2284 if (dodrop)
2285 mac_proc_vm_revoke(curthread);
2286 mtx_unlock(&Giant);
2287 } else {
2288 mtx_unlock(&subj->mtx);
2289 }
2290}
2291
2292static int
2293lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2294 struct vnode *vp, struct label *vplabel)
2295{
2296 struct mac_lomac ml_temp, *source, *dest;
2297 int buflen, error;
2298
2299 source = SLOT(mplabel);
2300 dest = SLOT(vplabel);
2301
2302 buflen = sizeof(ml_temp);
2303 bzero(&ml_temp, buflen);
2304
2305 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2306 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
2307 if (error == ENOATTR || error == EOPNOTSUPP) {
2308 /* Fall back to the mntlabel. */
2309 lomac_copy_single(source, dest);
2310 return (0);
2311 } else if (error)
2312 return (error);
2313
2314 if (buflen != sizeof(ml_temp)) {
2315 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
2316 printf("lomac_vnode_associate_extattr: bad size %d\n",
2317 buflen);
2318 return (EPERM);
2319 }
2320 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
2321 buflen = sizeof(ml_temp);
2322 (void)vn_extattr_set(vp, IO_NODELOCKED,
2323 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
2324 buflen, (char *)&ml_temp, curthread);
2325 }
2326 if (lomac_valid(&ml_temp) != 0) {
2327 printf("lomac_vnode_associate_extattr: invalid\n");
2328 return (EPERM);
2329 }
2330 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
2331 MAC_LOMAC_FLAG_SINGLE) {
2332 printf("lomac_vnode_associate_extattr: not single\n");
2333 return (EPERM);
2334 }
2335
2336 lomac_copy_single(&ml_temp, dest);
2337 return (0);
2338}
2339
2340static void
2341lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2342 struct vnode *vp, struct label *vplabel)
2343{
2344 struct mac_lomac *source, *dest;
2345
2346 source = SLOT(mplabel);
2347 dest = SLOT(vplabel);
2348
2349 lomac_copy_single(source, dest);
2350}
2351
2352static int
2353lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2354 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2355{
2356 struct mac_lomac *subj, *obj;
2357
2358 if (!lomac_enabled)
2359 return (0);
2360
2361 subj = SLOT(cred->cr_label);
2362 obj = SLOT(dvplabel);
2363
2364 if (!lomac_subject_dominate(subj, obj))
2365 return (EACCES);
2366 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2367 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2368 return (EACCES);
2369
2370 return (0);
2371}
2372
2373static int
2374lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2375 struct label *vplabel, acl_type_t type)
2376{
2377 struct mac_lomac *subj, *obj;
2378
2379 if (!lomac_enabled)
2380 return (0);
2381
2382 subj = SLOT(cred->cr_label);
2383 obj = SLOT(vplabel);
2384
2385 if (!lomac_subject_dominate(subj, obj))
2386 return (EACCES);
2387
2388 return (0);
2389}
2390
2391static int
2392lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
2393 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2394 struct componentname *cnp)
2395{
2396 struct mac_lomac *subj, *obj;
2397
2398 if (!lomac_enabled)
2399 return (0);
2400
2401 subj = SLOT(cred->cr_label);
2402 obj = SLOT(dvplabel);
2403
2404 if (!lomac_subject_dominate(subj, obj))
2405 return (EACCES);
2406
2407 obj = SLOT(vplabel);
2408
2409 if (!lomac_subject_dominate(subj, obj))
2410 return (EACCES);
2411
2412 return (0);
2413}
2414
2415static int
2416lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
2417 struct label *vplabel, int prot, int flags)
2418{
2419 struct mac_lomac *subj, *obj;
2420
2421 /*
2422 * Rely on the use of open()-time protections to handle
2423 * non-revocation cases.
2424 */
2425 if (!lomac_enabled)
2426 return (0);
2427
2428 subj = SLOT(cred->cr_label);
2429 obj = SLOT(vplabel);
2430
2431 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2432 if (!lomac_subject_dominate(subj, obj))
2433 return (EACCES);
2434 }
2435 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2436 if (!lomac_dominate_single(obj, subj))
2437 return (maybe_demote(subj, obj, "mapping", "file", vp));
2438 }
2439
2440 return (0);
2441}
2442
2443static void
2444lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2445 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2446{
2447 struct mac_lomac *subj, *obj;
2448
2449 /*
2450 * Rely on the use of open()-time protections to handle
2451 * non-revocation cases.
2452 */
2453 if (!lomac_enabled || !revocation_enabled)
2454 return;
2455
2456 subj = SLOT(cred->cr_label);
2457 obj = SLOT(vplabel);
2458
2459 if (!lomac_subject_dominate(subj, obj))
2460 *prot &= ~VM_PROT_WRITE;
2461}
2462
2463static int
2464lomac_vnode_check_open(struct ucred *cred, struct vnode *vp,
2465 struct label *vplabel, accmode_t accmode)
2466{
2467 struct mac_lomac *subj, *obj;
2468
2469 if (!lomac_enabled)
2470 return (0);
2471
2472 subj = SLOT(cred->cr_label);
2473 obj = SLOT(vplabel);
2474
2475 /* XXX privilege override for admin? */
2476 if (accmode & VMODIFY_PERMS) {
2477 if (!lomac_subject_dominate(subj, obj))
2478 return (EACCES);
2479 }
2480
2481 return (0);
2482}
2483
2484static int
2485lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
2486 struct vnode *vp, struct label *vplabel)
2487{
2488 struct mac_lomac *subj, *obj;
2489
2490 if (!lomac_enabled || !revocation_enabled)
2491 return (0);
2492
2493 subj = SLOT(active_cred->cr_label);
2494 obj = SLOT(vplabel);
2495
2496 if (!lomac_dominate_single(obj, subj))
2497 return (maybe_demote(subj, obj, "reading", "file", vp));
2498
2499 return (0);
2500}
2501
2502static int
2503lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
2504 struct label *vplabel, struct label *newlabel)
2505{
2506 struct mac_lomac *old, *new, *subj;
2507 int error;
2508
2509 old = SLOT(vplabel);
2510 new = SLOT(newlabel);
2511 subj = SLOT(cred->cr_label);
2512
2513 /*
2514 * If there is a LOMAC label update for the vnode, it must be a
2515 * single label, with an optional explicit auxiliary single.
2516 */
2517 error = lomac_atmostflags(new,
2518 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2519 if (error)
2520 return (error);
2521
2522 /*
2523 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2524 * authorize the relabel.
2525 */
2526 if (!lomac_single_in_range(old, subj))
2527 return (EPERM);
2528
2529 /*
2530 * If the LOMAC label is to be changed, authorize as appropriate.
2531 */
2532 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2533 /*
2534 * To change the LOMAC label on a vnode, the new vnode label
2535 * must be in the subject range.
2536 */
2537 if (!lomac_single_in_range(new, subj))
2538 return (EPERM);
2539
2540 /*
2541 * To change the LOMAC label on the vnode to be EQUAL, the
2542 * subject must have appropriate privilege.
2543 */
2544 if (lomac_contains_equal(new)) {
2545 error = lomac_subject_privileged(subj);
2546 if (error)
2547 return (error);
2548 }
2549 }
2550 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2551 /*
2552 * Fill in the missing parts from the previous label.
2553 */
2554 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2555 lomac_copy_single(subj, new);
2556
2557 /*
2558 * To change the auxiliary LOMAC label on a vnode, the new
2559 * vnode label must be in the subject range.
2560 */
2561 if (!lomac_auxsingle_in_range(new, subj))
2562 return (EPERM);
2563
2564 /*
2565 * To change the auxiliary LOMAC label on the vnode to be
2566 * EQUAL, the subject must have appropriate privilege.
2567 */
2568 if (lomac_contains_equal(new)) {
2569 error = lomac_subject_privileged(subj);
2570 if (error)
2571 return (error);
2572 }
2573 }
2574
2575 return (0);
2576}
2577
2578static int
2579lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
2580 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2581 struct componentname *cnp)
2582{
2583 struct mac_lomac *subj, *obj;
2584
2585 if (!lomac_enabled)
2586 return (0);
2587
2588 subj = SLOT(cred->cr_label);
2589 obj = SLOT(dvplabel);
2590
2591 if (!lomac_subject_dominate(subj, obj))
2592 return (EACCES);
2593
2594 obj = SLOT(vplabel);
2595
2596 if (!lomac_subject_dominate(subj, obj))
2597 return (EACCES);
2598
2599 return (0);
2600}
2601
2602static int
2603lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
2604 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2605 int samedir, struct componentname *cnp)
2606{
2607 struct mac_lomac *subj, *obj;
2608
2609 if (!lomac_enabled)
2610 return (0);
2611
2612 subj = SLOT(cred->cr_label);
2613 obj = SLOT(dvplabel);
2614
2615 if (!lomac_subject_dominate(subj, obj))
2616 return (EACCES);
2617
2618 if (vp != NULL) {
2619 obj = SLOT(vplabel);
2620
2621 if (!lomac_subject_dominate(subj, obj))
2622 return (EACCES);
2623 }
2624
2625 return (0);
2626}
2627
2628static int
2629lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
2630 struct label *vplabel)
2631{
2632 struct mac_lomac *subj, *obj;
2633
2634 if (!lomac_enabled)
2635 return (0);
2636
2637 subj = SLOT(cred->cr_label);
2638 obj = SLOT(vplabel);
2639
2640 if (!lomac_subject_dominate(subj, obj))
2641 return (EACCES);
2642
2643 return (0);
2644}
2645
2646static int
2647lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
2648 struct label *vplabel, acl_type_t type, struct acl *acl)
2649{
2650 struct mac_lomac *subj, *obj;
2651
2652 if (!lomac_enabled)
2653 return (0);
2654
2655 subj = SLOT(cred->cr_label);
2656 obj = SLOT(vplabel);
2657
2658 if (!lomac_subject_dominate(subj, obj))
2659 return (EACCES);
2660
2661 return (0);
2662}
2663
2664static int
2665lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
2666 struct label *vplabel, int attrnamespace, const char *name)
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 /* XXX: protect the MAC EA in a special way? */
2680
2681 return (0);
2682}
2683
2684static int
2685lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
2686 struct label *vplabel, u_long flags)
2687{
2688 struct mac_lomac *subj, *obj;
2689
2690 if (!lomac_enabled)
2691 return (0);
2692
2693 subj = SLOT(cred->cr_label);
2694 obj = SLOT(vplabel);
2695
2696 if (!lomac_subject_dominate(subj, obj))
2697 return (EACCES);
2698
2699 return (0);
2700}
2701
2702static int
2703lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
2704 struct label *vplabel, mode_t mode)
2705{
2706 struct mac_lomac *subj, *obj;
2707
2708 if (!lomac_enabled)
2709 return (0);
2710
2711 subj = SLOT(cred->cr_label);
2712 obj = SLOT(vplabel);
2713
2714 if (!lomac_subject_dominate(subj, obj))
2715 return (EACCES);
2716
2717 return (0);
2718}
2719
2720static int
2721lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
2722 struct label *vplabel, uid_t uid, gid_t gid)
2723{
2724 struct mac_lomac *subj, *obj;
2725
2726 if (!lomac_enabled)
2727 return (0);
2728
2729 subj = SLOT(cred->cr_label);
2730 obj = SLOT(vplabel);
2731
2732 if (!lomac_subject_dominate(subj, obj))
2733 return (EACCES);
2734
2735 return (0);
2736}
2737
2738static int
2739lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
2740 struct label *vplabel, struct timespec atime, struct timespec mtime)
2741{
2742 struct mac_lomac *subj, *obj;
2743
2744 if (!lomac_enabled)
2745 return (0);
2746
2747 subj = SLOT(cred->cr_label);
2748 obj = SLOT(vplabel);
2749
2750 if (!lomac_subject_dominate(subj, obj))
2751 return (EACCES);
2752
2753 return (0);
2754}
2755
2756static int
2757lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
2758 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2759 struct componentname *cnp)
2760{
2761 struct mac_lomac *subj, *obj;
2762
2763 if (!lomac_enabled)
2764 return (0);
2765
2766 subj = SLOT(cred->cr_label);
2767 obj = SLOT(dvplabel);
2768
2769 if (!lomac_subject_dominate(subj, obj))
2770 return (EACCES);
2771
2772 obj = SLOT(vplabel);
2773
2774 if (!lomac_subject_dominate(subj, obj))
2775 return (EACCES);
2776
2777 return (0);
2778}
2779
2780static int
2781lomac_vnode_check_write(struct ucred *active_cred,
2782 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2783{
2784 struct mac_lomac *subj, *obj;
2785
2786 if (!lomac_enabled || !revocation_enabled)
2787 return (0);
2788
2789 subj = SLOT(active_cred->cr_label);
2790 obj = SLOT(vplabel);
2791
2792 if (!lomac_subject_dominate(subj, obj))
2793 return (EACCES);
2794
2795 return (0);
2796}
2797
2798static int
2799lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
2800 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
2801 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
2802{
2803 struct mac_lomac *source, *dest, *dir, temp;
2804 size_t buflen;
2805 int error;
2806
2807 buflen = sizeof(temp);
2808 bzero(&temp, buflen);
2809
2810 source = SLOT(cred->cr_label);
2811 dest = SLOT(vplabel);
2812 dir = SLOT(dvplabel);
2813 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
2814 lomac_copy_auxsingle(dir, &temp);
2815 lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
2816 dir->ml_auxsingle.mle_grade);
2817 } else {
2818 lomac_copy_single(source, &temp);
2819 }
2820
2821 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2822 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2823 if (error == 0)
2824 lomac_copy(&temp, dest);
2825 return (error);
2826}
2827
2828static void
2829lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
2830 struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
2831 struct image_params *imgp, struct label *execlabel)
2832{
2833 struct mac_lomac *source, *dest, *obj, *robj;
2834
2835 source = SLOT(old->cr_label);
2836 dest = SLOT(new->cr_label);
2837 obj = SLOT(vplabel);
2838 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2839
2840 lomac_copy(source, dest);
2841 /*
2842 * If there's an auxiliary label on the real object, respect it and
2843 * assume that this level should be assumed immediately if a higher
2844 * level is currently in place.
2845 */
2846 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2847 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
2848 && lomac_auxsingle_in_range(robj, dest))
2849 lomac_set_single(dest, robj->ml_auxsingle.mle_type,
2850 robj->ml_auxsingle.mle_grade);
2851 /*
2852 * Restructuring to use the execve transitioning mechanism instead of
2853 * the normal demotion mechanism here would be difficult, so just
2854 * copy the label over and perform standard demotion. This is also
2855 * non-optimal because it will result in the intermediate label "new"
2856 * being created and immediately recycled.
2857 */
2858 if (lomac_enabled && revocation_enabled &&
2859 !lomac_dominate_single(obj, source))
2860 (void)maybe_demote(source, obj, "executing", "file", vp);
2861}
2862
2863static int
2864lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
2865 struct label *vplabel, struct label *interpvplabel,
2866 struct image_params *imgp, struct label *execlabel)
2867{
2868 struct mac_lomac *subj, *obj, *robj;
2869
2870 if (!lomac_enabled || !revocation_enabled)
2871 return (0);
2872
2873 subj = SLOT(old->cr_label);
2874 obj = SLOT(vplabel);
2875 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2876
2877 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2878 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
2879 && lomac_auxsingle_in_range(robj, subj)) ||
2880 !lomac_dominate_single(obj, subj));
2881}
2882
2883static void
2884lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
2885 struct label *vplabel, struct label *newlabel)
2886{
2887 struct mac_lomac *source, *dest;
2888
2889 source = SLOT(newlabel);
2890 dest = SLOT(vplabel);
2891
2892 try_relabel(source, dest);
2893}
2894
2895static int
2896lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
2897 struct label *vplabel, struct label *intlabel)
2898{
2899 struct mac_lomac *source, temp;
2900 size_t buflen;
2901 int error;
2902
2903 buflen = sizeof(temp);
2904 bzero(&temp, buflen);
2905
2906 source = SLOT(intlabel);
2907 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2908 return (0);
2909
2910 lomac_copy_single(source, &temp);
2911 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2912 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2913 return (error);
2914}
2915
2916static struct mac_policy_ops lomac_ops =
2917{
2918 .mpo_init = lomac_init,
2919
2920 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive,
2921 .mpo_bpfdesc_create = lomac_bpfdesc_create,
2922 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf,
2923 .mpo_bpfdesc_destroy_label = lomac_destroy_label,
2924 .mpo_bpfdesc_init_label = lomac_init_label,
2925
2926 .mpo_cred_check_relabel = lomac_cred_check_relabel,
2927 .mpo_cred_check_visible = lomac_cred_check_visible,
2928 .mpo_cred_copy_label = lomac_copy_label,
2929 .mpo_cred_create_swapper = lomac_cred_create_swapper,
2930 .mpo_cred_create_init = lomac_cred_create_init,
2931 .mpo_cred_destroy_label = lomac_destroy_label,
2932 .mpo_cred_externalize_label = lomac_externalize_label,
2933 .mpo_cred_init_label = lomac_init_label,
2934 .mpo_cred_internalize_label = lomac_internalize_label,
2935 .mpo_cred_relabel = lomac_cred_relabel,
2936
2937 .mpo_devfs_create_device = lomac_devfs_create_device,
2938 .mpo_devfs_create_directory = lomac_devfs_create_directory,
2939 .mpo_devfs_create_symlink = lomac_devfs_create_symlink,
2940 .mpo_devfs_destroy_label = lomac_destroy_label,
2941 .mpo_devfs_init_label = lomac_init_label,
2942 .mpo_devfs_update = lomac_devfs_update,
2943 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate,
2944
2945 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel,
2946 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit,
2947 .mpo_ifnet_copy_label = lomac_copy_label,
2948 .mpo_ifnet_create = lomac_ifnet_create,
2949 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf,
2950 .mpo_ifnet_destroy_label = lomac_destroy_label,
2951 .mpo_ifnet_externalize_label = lomac_externalize_label,
2952 .mpo_ifnet_init_label = lomac_init_label,
2953 .mpo_ifnet_internalize_label = lomac_internalize_label,
2954 .mpo_ifnet_relabel = lomac_ifnet_relabel,
2955
2956 .mpo_syncache_create = lomac_syncache_create,
2957 .mpo_syncache_destroy_label = lomac_destroy_label,
2958 .mpo_syncache_init_label = lomac_init_label_waitcheck,
2959
2960 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver,
2961 .mpo_inpcb_check_visible = lomac_inpcb_check_visible,
2962 .mpo_inpcb_create = lomac_inpcb_create,
2963 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf,
2964 .mpo_inpcb_destroy_label = lomac_destroy_label,
2965 .mpo_inpcb_init_label = lomac_init_label_waitcheck,
2966 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
2967
2968 .mpo_ip6q_create = lomac_ip6q_create,
2969 .mpo_ip6q_destroy_label = lomac_destroy_label,
2970 .mpo_ip6q_init_label = lomac_init_label_waitcheck,
2971 .mpo_ip6q_match = lomac_ip6q_match,
2972 .mpo_ip6q_reassemble = lomac_ip6q_reassemble,
2973 .mpo_ip6q_update = lomac_ip6q_update,
2974
2975 .mpo_ipq_create = lomac_ipq_create,
2976 .mpo_ipq_destroy_label = lomac_destroy_label,
2977 .mpo_ipq_init_label = lomac_init_label_waitcheck,
2978 .mpo_ipq_match = lomac_ipq_match,
2979 .mpo_ipq_reassemble = lomac_ipq_reassemble,
2980 .mpo_ipq_update = lomac_ipq_update,
2981
2982 .mpo_kld_check_load = lomac_kld_check_load,
2983
2984 .mpo_mbuf_copy_label = lomac_copy_label,
2985 .mpo_mbuf_destroy_label = lomac_destroy_label,
2986 .mpo_mbuf_init_label = lomac_init_label_waitcheck,
2987
2988 .mpo_mount_create = lomac_mount_create,
2989 .mpo_mount_destroy_label = lomac_destroy_label,
2990 .mpo_mount_init_label = lomac_init_label,
2991
2992 .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send,
2993
2994 .mpo_netinet_arp_send = lomac_netinet_arp_send,
2995 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply,
2996 .mpo_netinet_firewall_send = lomac_netinet_firewall_send,
2997 .mpo_netinet_fragment = lomac_netinet_fragment,
2998 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply,
2999 .mpo_netinet_igmp_send = lomac_netinet_igmp_send,
3000
3001 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send,
3002
3003 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl,
3004 .mpo_pipe_check_read = lomac_pipe_check_read,
3005 .mpo_pipe_check_relabel = lomac_pipe_check_relabel,
3006 .mpo_pipe_check_write = lomac_pipe_check_write,
3007 .mpo_pipe_copy_label = lomac_copy_label,
3008 .mpo_pipe_create = lomac_pipe_create,
3009 .mpo_pipe_destroy_label = lomac_destroy_label,
3010 .mpo_pipe_externalize_label = lomac_externalize_label,
3011 .mpo_pipe_init_label = lomac_init_label,
3012 .mpo_pipe_internalize_label = lomac_internalize_label,
3013 .mpo_pipe_relabel = lomac_pipe_relabel,
3014
3015 .mpo_priv_check = lomac_priv_check,
3016
3017 .mpo_proc_check_debug = lomac_proc_check_debug,
3018 .mpo_proc_check_sched = lomac_proc_check_sched,
3019 .mpo_proc_check_signal = lomac_proc_check_signal,
3020 .mpo_proc_destroy_label = lomac_proc_destroy_label,
3021 .mpo_proc_init_label = lomac_proc_init_label,
3022
3023 .mpo_socket_check_deliver = lomac_socket_check_deliver,
3024 .mpo_socket_check_relabel = lomac_socket_check_relabel,
3025 .mpo_socket_check_visible = lomac_socket_check_visible,
3026 .mpo_socket_copy_label = lomac_copy_label,
3027 .mpo_socket_create = lomac_socket_create,
3028 .mpo_socket_create_mbuf = lomac_socket_create_mbuf,
3029 .mpo_socket_destroy_label = lomac_destroy_label,
3030 .mpo_socket_externalize_label = lomac_externalize_label,
3031 .mpo_socket_init_label = lomac_init_label_waitcheck,
3032 .mpo_socket_internalize_label = lomac_internalize_label,
3033 .mpo_socket_newconn = lomac_socket_newconn,
3034 .mpo_socket_relabel = lomac_socket_relabel,
3035
3036 .mpo_socketpeer_destroy_label = lomac_destroy_label,
3037 .mpo_socketpeer_externalize_label = lomac_externalize_label,
3038 .mpo_socketpeer_init_label = lomac_init_label_waitcheck,
3039 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf,
3040 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket,
3041
3042 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf,
3043
3044 .mpo_system_check_acct = lomac_system_check_acct,
3045 .mpo_system_check_auditctl = lomac_system_check_auditctl,
3046 .mpo_system_check_swapoff = lomac_system_check_swapoff,
3047 .mpo_system_check_swapon = lomac_system_check_swapon,
3048 .mpo_system_check_sysctl = lomac_system_check_sysctl,
3049
3050 .mpo_thread_userret = lomac_thread_userret,
3051
3052 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr,
3053 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel,
3054 .mpo_vnode_check_access = lomac_vnode_check_open,
3055 .mpo_vnode_check_create = lomac_vnode_check_create,
3056 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl,
3057 .mpo_vnode_check_link = lomac_vnode_check_link,
3058 .mpo_vnode_check_mmap = lomac_vnode_check_mmap,
3059 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade,
3060 .mpo_vnode_check_open = lomac_vnode_check_open,
3061 .mpo_vnode_check_read = lomac_vnode_check_read,
3062 .mpo_vnode_check_relabel = lomac_vnode_check_relabel,
3063 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from,
3064 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to,
3065 .mpo_vnode_check_revoke = lomac_vnode_check_revoke,
3066 .mpo_vnode_check_setacl = lomac_vnode_check_setacl,
3067 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr,
3068 .mpo_vnode_check_setflags = lomac_vnode_check_setflags,
3069 .mpo_vnode_check_setmode = lomac_vnode_check_setmode,
3070 .mpo_vnode_check_setowner = lomac_vnode_check_setowner,
3071 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes,
3072 .mpo_vnode_check_unlink = lomac_vnode_check_unlink,
3073 .mpo_vnode_check_write = lomac_vnode_check_write,
3074 .mpo_vnode_copy_label = lomac_copy_label,
3075 .mpo_vnode_create_extattr = lomac_vnode_create_extattr,
3076 .mpo_vnode_destroy_label = lomac_destroy_label,
3077 .mpo_vnode_execve_transition = lomac_vnode_execve_transition,
3078 .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition,
3079 .mpo_vnode_externalize_label = lomac_externalize_label,
3080 .mpo_vnode_init_label = lomac_init_label,
3081 .mpo_vnode_internalize_label = lomac_internalize_label,
3082 .mpo_vnode_relabel = lomac_vnode_relabel,
3083 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr,
3084};
3085
3086MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
3087 MPC_LOADTIME_FLAG_NOTLATE, &lomac_slot);
| 141
142static struct mac_lomac *
143lomac_alloc(int flag)
144{
145 struct mac_lomac *ml;
146
147 ml = malloc(sizeof(*ml), M_LOMAC, M_ZERO | flag);
148
149 return (ml);
150}
151
152static void
153lomac_free(struct mac_lomac *ml)
154{
155
156 if (ml != NULL)
157 free(ml, M_LOMAC);
158 else
159 atomic_add_int(&destroyed_not_inited, 1);
160}
161
162static int
163lomac_atmostflags(struct mac_lomac *ml, int flags)
164{
165
166 if ((ml->ml_flags & flags) != ml->ml_flags)
167 return (EINVAL);
168 return (0);
169}
170
171static int
172lomac_dominate_element(struct mac_lomac_element *a,
173 struct mac_lomac_element *b)
174{
175
176 switch (a->mle_type) {
177 case MAC_LOMAC_TYPE_EQUAL:
178 case MAC_LOMAC_TYPE_HIGH:
179 return (1);
180
181 case MAC_LOMAC_TYPE_LOW:
182 switch (b->mle_type) {
183 case MAC_LOMAC_TYPE_GRADE:
184 case MAC_LOMAC_TYPE_HIGH:
185 return (0);
186
187 case MAC_LOMAC_TYPE_EQUAL:
188 case MAC_LOMAC_TYPE_LOW:
189 return (1);
190
191 default:
192 panic("lomac_dominate_element: b->mle_type invalid");
193 }
194
195 case MAC_LOMAC_TYPE_GRADE:
196 switch (b->mle_type) {
197 case MAC_LOMAC_TYPE_EQUAL:
198 case MAC_LOMAC_TYPE_LOW:
199 return (1);
200
201 case MAC_LOMAC_TYPE_HIGH:
202 return (0);
203
204 case MAC_LOMAC_TYPE_GRADE:
205 return (a->mle_grade >= b->mle_grade);
206
207 default:
208 panic("lomac_dominate_element: b->mle_type invalid");
209 }
210
211 default:
212 panic("lomac_dominate_element: a->mle_type invalid");
213 }
214}
215
216static int
217lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
218{
219
220 return (lomac_dominate_element(&rangeb->ml_rangehigh,
221 &rangea->ml_rangehigh) &&
222 lomac_dominate_element(&rangea->ml_rangelow,
223 &rangeb->ml_rangelow));
224}
225
226static int
227lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
228{
229
230 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
231 ("lomac_single_in_range: a not single"));
232 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
233 ("lomac_single_in_range: b not range"));
234
235 return (lomac_dominate_element(&range->ml_rangehigh,
236 &single->ml_single) && lomac_dominate_element(&single->ml_single,
237 &range->ml_rangelow));
238}
239
240static int
241lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
242{
243
244 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
245 ("lomac_single_in_range: a not auxsingle"));
246 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
247 ("lomac_single_in_range: b not range"));
248
249 return (lomac_dominate_element(&range->ml_rangehigh,
250 &single->ml_auxsingle) &&
251 lomac_dominate_element(&single->ml_auxsingle,
252 &range->ml_rangelow));
253}
254
255static int
256lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
257{
258 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
259 ("lomac_dominate_single: a not single"));
260 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
261 ("lomac_dominate_single: b not single"));
262
263 return (lomac_dominate_element(&a->ml_single, &b->ml_single));
264}
265
266static int
267lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
268{
269 KASSERT((~a->ml_flags &
270 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
271 ("lomac_dominate_single: a not subject"));
272 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
273 ("lomac_dominate_single: b not single"));
274
275 return (lomac_dominate_element(&a->ml_rangehigh, &b->ml_single));
276}
277
278static int
279lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
280{
281
282 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
283 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
284 return (1);
285
286 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
287}
288
289static int
290lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
291{
292
293 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
294 ("lomac_equal_single: a not single"));
295 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
296 ("lomac_equal_single: b not single"));
297
298 return (lomac_equal_element(&a->ml_single, &b->ml_single));
299}
300
301static int
302lomac_contains_equal(struct mac_lomac *ml)
303{
304
305 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE)
306 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
307 return (1);
308 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX)
309 if (ml->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
310 return (1);
311
312 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
313 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
314 return (1);
315 if (ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
316 return (1);
317 }
318
319 return (0);
320}
321
322static int
323lomac_subject_privileged(struct mac_lomac *ml)
324{
325
326 KASSERT((ml->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
327 MAC_LOMAC_FLAGS_BOTH,
328 ("lomac_subject_privileged: subject doesn't have both labels"));
329
330 /* If the single is EQUAL, it's ok. */
331 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
332 return (0);
333
334 /* If either range endpoint is EQUAL, it's ok. */
335 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
336 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
337 return (0);
338
339 /* If the range is low-high, it's ok. */
340 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
341 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
342 return (0);
343
344 /* It's not ok. */
345 return (EPERM);
346}
347
348static int
349lomac_high_single(struct mac_lomac *ml)
350{
351
352 KASSERT((ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
353 ("lomac_high_single: mac_lomac not single"));
354
355 return (ml->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
356}
357
358static int
359lomac_valid(struct mac_lomac *ml)
360{
361
362 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
363 switch (ml->ml_single.mle_type) {
364 case MAC_LOMAC_TYPE_GRADE:
365 case MAC_LOMAC_TYPE_EQUAL:
366 case MAC_LOMAC_TYPE_HIGH:
367 case MAC_LOMAC_TYPE_LOW:
368 break;
369
370 default:
371 return (EINVAL);
372 }
373 } else {
374 if (ml->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
375 return (EINVAL);
376 }
377
378 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
379 switch (ml->ml_auxsingle.mle_type) {
380 case MAC_LOMAC_TYPE_GRADE:
381 case MAC_LOMAC_TYPE_EQUAL:
382 case MAC_LOMAC_TYPE_HIGH:
383 case MAC_LOMAC_TYPE_LOW:
384 break;
385
386 default:
387 return (EINVAL);
388 }
389 } else {
390 if (ml->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
391 return (EINVAL);
392 }
393
394 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
395 switch (ml->ml_rangelow.mle_type) {
396 case MAC_LOMAC_TYPE_GRADE:
397 case MAC_LOMAC_TYPE_EQUAL:
398 case MAC_LOMAC_TYPE_HIGH:
399 case MAC_LOMAC_TYPE_LOW:
400 break;
401
402 default:
403 return (EINVAL);
404 }
405
406 switch (ml->ml_rangehigh.mle_type) {
407 case MAC_LOMAC_TYPE_GRADE:
408 case MAC_LOMAC_TYPE_EQUAL:
409 case MAC_LOMAC_TYPE_HIGH:
410 case MAC_LOMAC_TYPE_LOW:
411 break;
412
413 default:
414 return (EINVAL);
415 }
416 if (!lomac_dominate_element(&ml->ml_rangehigh,
417 &ml->ml_rangelow))
418 return (EINVAL);
419 } else {
420 if (ml->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
421 ml->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
422 return (EINVAL);
423 }
424
425 return (0);
426}
427
428static void
429lomac_set_range(struct mac_lomac *ml, u_short typelow, u_short gradelow,
430 u_short typehigh, u_short gradehigh)
431{
432
433 ml->ml_rangelow.mle_type = typelow;
434 ml->ml_rangelow.mle_grade = gradelow;
435 ml->ml_rangehigh.mle_type = typehigh;
436 ml->ml_rangehigh.mle_grade = gradehigh;
437 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
438}
439
440static void
441lomac_set_single(struct mac_lomac *ml, u_short type, u_short grade)
442{
443
444 ml->ml_single.mle_type = type;
445 ml->ml_single.mle_grade = grade;
446 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
447}
448
449static void
450lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
451{
452
453 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
454 ("lomac_copy_range: labelfrom not range"));
455
456 labelto->ml_rangelow = labelfrom->ml_rangelow;
457 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
458 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
459}
460
461static void
462lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
463{
464
465 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
466 ("lomac_copy_single: labelfrom not single"));
467
468 labelto->ml_single = labelfrom->ml_single;
469 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
470}
471
472static void
473lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
474{
475
476 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
477 ("lomac_copy_auxsingle: labelfrom not auxsingle"));
478
479 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
480 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
481}
482
483static void
484lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
485{
486
487 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
488 lomac_copy_single(source, dest);
489 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
490 lomac_copy_auxsingle(source, dest);
491 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
492 lomac_copy_range(source, dest);
493}
494
495static int lomac_to_string(struct sbuf *sb, struct mac_lomac *ml);
496
497static int
498maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
499 const char *actionname, const char *objname, struct vnode *vp)
500{
501 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
502 char *subjlabeltext, *objlabeltext, *subjtext;
503 struct mac_lomac cached_subjlabel;
504 struct mac_lomac_proc *subj;
505 struct vattr va;
506 struct proc *p;
507 pid_t pgid;
508
509 subj = PSLOT(curthread->td_proc->p_label);
510
511 p = curthread->td_proc;
512 mtx_lock(&subj->mtx);
513 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
514 /*
515 * Check to see if the pending demotion would be more or less
516 * severe than this one, and keep the more severe. This can
517 * only happen for a multi-threaded application.
518 */
519 if (lomac_dominate_single(objlabel, &subj->mac_lomac)) {
520 mtx_unlock(&subj->mtx);
521 return (0);
522 }
523 }
524 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
525 /*
526 * Always demote the single label.
527 */
528 lomac_copy_single(objlabel, &subj->mac_lomac);
529 /*
530 * Start with the original range, then minimize each side of the
531 * range to the point of not dominating the object. The high side
532 * will always be demoted, of course.
533 */
534 lomac_copy_range(subjlabel, &subj->mac_lomac);
535 if (!lomac_dominate_element(&objlabel->ml_single,
536 &subj->mac_lomac.ml_rangelow))
537 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
538 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
539 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
540 thread_lock(curthread);
541 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND;
542 thread_unlock(curthread);
543
544 /*
545 * Avoid memory allocation while holding a mutex; cache the label.
546 */
547 lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
548 mtx_unlock(&subj->mtx);
549
550 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
551 lomac_to_string(&subjlabel_sb, subjlabel);
552 sbuf_finish(&subjlabel_sb);
553 subjlabeltext = sbuf_data(&subjlabel_sb);
554
555 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
556 lomac_to_string(&subjtext_sb, &subj->mac_lomac);
557 sbuf_finish(&subjtext_sb);
558 subjtext = sbuf_data(&subjtext_sb);
559
560 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
561 lomac_to_string(&objlabel_sb, objlabel);
562 sbuf_finish(&objlabel_sb);
563 objlabeltext = sbuf_data(&objlabel_sb);
564
565 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
566 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred) == 0) {
567 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
568 " level %s after %s a level-%s %s (inode=%ld, "
569 "mountpount=%s)\n",
570 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
571 p->p_comm, subjtext, actionname, objlabeltext, objname,
572 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
573 } else {
574 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
575 " level %s after %s a level-%s %s\n",
576 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
577 p->p_comm, subjtext, actionname, objlabeltext, objname);
578 }
579
580 sbuf_delete(&subjlabel_sb);
581 sbuf_delete(&subjtext_sb);
582 sbuf_delete(&objlabel_sb);
583
584 return (0);
585}
586
587/*
588 * Relabel "to" to "from" only if "from" is a valid label (contains at least
589 * a single), as for a relabel operation which may or may not involve a
590 * relevant label.
591 */
592static void
593try_relabel(struct mac_lomac *from, struct mac_lomac *to)
594{
595
596 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
597 bzero(to, sizeof(*to));
598 lomac_copy(from, to);
599 }
600}
601
602/*
603 * Policy module operations.
604 */
605static void
606lomac_init(struct mac_policy_conf *conf)
607{
608
609}
610
611/*
612 * Label operations.
613 */
614static void
615lomac_init_label(struct label *label)
616{
617
618 SLOT_SET(label, lomac_alloc(M_WAITOK));
619}
620
621static int
622lomac_init_label_waitcheck(struct label *label, int flag)
623{
624
625 SLOT_SET(label, lomac_alloc(flag));
626 if (SLOT(label) == NULL)
627 return (ENOMEM);
628
629 return (0);
630}
631
632static void
633lomac_destroy_label(struct label *label)
634{
635
636 lomac_free(SLOT(label));
637 SLOT_SET(label, NULL);
638}
639
640static int
641lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
642{
643
644 switch (element->mle_type) {
645 case MAC_LOMAC_TYPE_HIGH:
646 return (sbuf_printf(sb, "high"));
647
648 case MAC_LOMAC_TYPE_LOW:
649 return (sbuf_printf(sb, "low"));
650
651 case MAC_LOMAC_TYPE_EQUAL:
652 return (sbuf_printf(sb, "equal"));
653
654 case MAC_LOMAC_TYPE_GRADE:
655 return (sbuf_printf(sb, "%d", element->mle_grade));
656
657 default:
658 panic("lomac_element_to_string: invalid type (%d)",
659 element->mle_type);
660 }
661}
662
663static int
664lomac_to_string(struct sbuf *sb, struct mac_lomac *ml)
665{
666
667 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
668 if (lomac_element_to_string(sb, &ml->ml_single) == -1)
669 return (EINVAL);
670 }
671
672 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
673 if (sbuf_putc(sb, '[') == -1)
674 return (EINVAL);
675
676 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1)
677 return (EINVAL);
678
679 if (sbuf_putc(sb, ']') == -1)
680 return (EINVAL);
681 }
682
683 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
684 if (sbuf_putc(sb, '(') == -1)
685 return (EINVAL);
686
687 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1)
688 return (EINVAL);
689
690 if (sbuf_putc(sb, '-') == -1)
691 return (EINVAL);
692
693 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1)
694 return (EINVAL);
695
696 if (sbuf_putc(sb, ')') == -1)
697 return (EINVAL);
698 }
699
700 return (0);
701}
702
703static int
704lomac_externalize_label(struct label *label, char *element_name,
705 struct sbuf *sb, int *claimed)
706{
707 struct mac_lomac *ml;
708
709 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
710 return (0);
711
712 (*claimed)++;
713
714 ml = SLOT(label);
715
716 return (lomac_to_string(sb, ml));
717}
718
719static int
720lomac_parse_element(struct mac_lomac_element *element, char *string)
721{
722
723 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
724 element->mle_type = MAC_LOMAC_TYPE_HIGH;
725 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
726 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
727 element->mle_type = MAC_LOMAC_TYPE_LOW;
728 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
729 } else if (strcmp(string, "equal") == 0 ||
730 strcmp(string, "eq") == 0) {
731 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
732 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
733 } else {
734 char *p0, *p1;
735 int d;
736
737 p0 = string;
738 d = strtol(p0, &p1, 10);
739
740 if (d < 0 || d > 65535)
741 return (EINVAL);
742 element->mle_type = MAC_LOMAC_TYPE_GRADE;
743 element->mle_grade = d;
744
745 if (p1 == p0 || *p1 != '\0')
746 return (EINVAL);
747 }
748
749 return (0);
750}
751
752/*
753 * Note: destructively consumes the string, make a local copy before calling
754 * if that's a problem.
755 */
756static int
757lomac_parse(struct mac_lomac *ml, char *string)
758{
759 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
760 *auxsingleend;
761 int error;
762
763 /* Do we have a range? */
764 single = string;
765 range = index(string, '(');
766 if (range == single)
767 single = NULL;
768 auxsingle = index(string, '[');
769 if (auxsingle == single)
770 single = NULL;
771 if (range != NULL && auxsingle != NULL)
772 return (EINVAL);
773 rangelow = rangehigh = NULL;
774 if (range != NULL) {
775 /* Nul terminate the end of the single string. */
776 *range = '\0';
777 range++;
778 rangelow = range;
779 rangehigh = index(rangelow, '-');
780 if (rangehigh == NULL)
781 return (EINVAL);
782 rangehigh++;
783 if (*rangelow == '\0' || *rangehigh == '\0')
784 return (EINVAL);
785 rangeend = index(rangehigh, ')');
786 if (rangeend == NULL)
787 return (EINVAL);
788 if (*(rangeend + 1) != '\0')
789 return (EINVAL);
790 /* Nul terminate the ends of the ranges. */
791 *(rangehigh - 1) = '\0';
792 *rangeend = '\0';
793 }
794 KASSERT((rangelow != NULL && rangehigh != NULL) ||
795 (rangelow == NULL && rangehigh == NULL),
796 ("lomac_internalize_label: range mismatch"));
797 if (auxsingle != NULL) {
798 /* Nul terminate the end of the single string. */
799 *auxsingle = '\0';
800 auxsingle++;
801 auxsingleend = index(auxsingle, ']');
802 if (auxsingleend == NULL)
803 return (EINVAL);
804 if (*(auxsingleend + 1) != '\0')
805 return (EINVAL);
806 /* Nul terminate the end of the auxsingle. */
807 *auxsingleend = '\0';
808 }
809
810 bzero(ml, sizeof(*ml));
811 if (single != NULL) {
812 error = lomac_parse_element(&ml->ml_single, single);
813 if (error)
814 return (error);
815 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
816 }
817
818 if (auxsingle != NULL) {
819 error = lomac_parse_element(&ml->ml_auxsingle, auxsingle);
820 if (error)
821 return (error);
822 ml->ml_flags |= MAC_LOMAC_FLAG_AUX;
823 }
824
825 if (rangelow != NULL) {
826 error = lomac_parse_element(&ml->ml_rangelow, rangelow);
827 if (error)
828 return (error);
829 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh);
830 if (error)
831 return (error);
832 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
833 }
834
835 error = lomac_valid(ml);
836 if (error)
837 return (error);
838
839 return (0);
840}
841
842static int
843lomac_internalize_label(struct label *label, char *element_name,
844 char *element_data, int *claimed)
845{
846 struct mac_lomac *ml, ml_temp;
847 int error;
848
849 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
850 return (0);
851
852 (*claimed)++;
853
854 error = lomac_parse(&ml_temp, element_data);
855 if (error)
856 return (error);
857
858 ml = SLOT(label);
859 *ml = ml_temp;
860
861 return (0);
862}
863
864static void
865lomac_copy_label(struct label *src, struct label *dest)
866{
867
868 *SLOT(dest) = *SLOT(src);
869}
870
871/*
872 * Object-specific entry point implementations are sorted alphabetically by
873 * object type name and then by operation.
874 */
875static int
876lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
877 struct ifnet *ifp, struct label *ifplabel)
878{
879 struct mac_lomac *a, *b;
880
881 if (!lomac_enabled)
882 return (0);
883
884 a = SLOT(dlabel);
885 b = SLOT(ifplabel);
886
887 if (lomac_equal_single(a, b))
888 return (0);
889 return (EACCES);
890}
891
892static void
893lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
894 struct label *dlabel)
895{
896 struct mac_lomac *source, *dest;
897
898 source = SLOT(cred->cr_label);
899 dest = SLOT(dlabel);
900
901 lomac_copy_single(source, dest);
902}
903
904static void
905lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
906 struct mbuf *m, struct label *mlabel)
907{
908 struct mac_lomac *source, *dest;
909
910 source = SLOT(dlabel);
911 dest = SLOT(mlabel);
912
913 lomac_copy_single(source, dest);
914}
915
916static int
917lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
918{
919 struct mac_lomac *subj, *new;
920 int error;
921
922 subj = SLOT(cred->cr_label);
923 new = SLOT(newlabel);
924
925 /*
926 * If there is a LOMAC label update for the credential, it may be an
927 * update of the single, range, or both.
928 */
929 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
930 if (error)
931 return (error);
932
933 /*
934 * If the LOMAC label is to be changed, authorize as appropriate.
935 */
936 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
937 /*
938 * Fill in the missing parts from the previous label.
939 */
940 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
941 lomac_copy_single(subj, new);
942 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
943 lomac_copy_range(subj, new);
944
945 /*
946 * To change the LOMAC range on a credential, the new range
947 * label must be in the current range.
948 */
949 if (!lomac_range_in_range(new, subj))
950 return (EPERM);
951
952 /*
953 * To change the LOMAC single label on a credential, the new
954 * single label must be in the new range. Implicitly from
955 * the previous check, the new single is in the old range.
956 */
957 if (!lomac_single_in_range(new, new))
958 return (EPERM);
959
960 /*
961 * To have EQUAL in any component of the new credential LOMAC
962 * label, the subject must already have EQUAL in their label.
963 */
964 if (lomac_contains_equal(new)) {
965 error = lomac_subject_privileged(subj);
966 if (error)
967 return (error);
968 }
969
970 /*
971 * XXXMAC: Additional consistency tests regarding the single
972 * and range of the new label might be performed here.
973 */
974 }
975
976 return (0);
977}
978
979static int
980lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
981{
982 struct mac_lomac *subj, *obj;
983
984 if (!lomac_enabled)
985 return (0);
986
987 subj = SLOT(cr1->cr_label);
988 obj = SLOT(cr2->cr_label);
989
990 /* XXX: range */
991 if (!lomac_dominate_single(obj, subj))
992 return (ESRCH);
993
994 return (0);
995}
996
997static void
998lomac_cred_create_init(struct ucred *cred)
999{
1000 struct mac_lomac *dest;
1001
1002 dest = SLOT(cred->cr_label);
1003
1004 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
1005 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1006}
1007
1008static void
1009lomac_cred_create_swapper(struct ucred *cred)
1010{
1011 struct mac_lomac *dest;
1012
1013 dest = SLOT(cred->cr_label);
1014
1015 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1016 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1017}
1018
1019static void
1020lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
1021{
1022 struct mac_lomac *source, *dest;
1023
1024 source = SLOT(newlabel);
1025 dest = SLOT(cred->cr_label);
1026
1027 try_relabel(source, dest);
1028}
1029
1030static void
1031lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
1032 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
1033{
1034 struct mac_lomac *ml;
1035 const char *dn;
1036 int lomac_type;
1037
1038 ml = SLOT(delabel);
1039 dn = devtoname(dev);
1040 if (strcmp(dn, "null") == 0 ||
1041 strcmp(dn, "zero") == 0 ||
1042 strcmp(dn, "random") == 0 ||
1043 strncmp(dn, "fd/", strlen("fd/")) == 0 ||
1044 strncmp(dn, "ttyv", strlen("ttyv")) == 0)
1045 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1046 else if (ptys_equal &&
1047 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
1048 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
1049 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
1050 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1051 else
1052 lomac_type = MAC_LOMAC_TYPE_HIGH;
1053 lomac_set_single(ml, lomac_type, 0);
1054}
1055
1056static void
1057lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
1058 struct devfs_dirent *de, struct label *delabel)
1059{
1060 struct mac_lomac *ml;
1061
1062 ml = SLOT(delabel);
1063 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
1064}
1065
1066static void
1067lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
1068 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
1069 struct label *delabel)
1070{
1071 struct mac_lomac *source, *dest;
1072
1073 source = SLOT(cred->cr_label);
1074 dest = SLOT(delabel);
1075
1076 lomac_copy_single(source, dest);
1077}
1078
1079static void
1080lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
1081 struct label *delabel, struct vnode *vp, struct label *vplabel)
1082{
1083 struct mac_lomac *source, *dest;
1084
1085 source = SLOT(vplabel);
1086 dest = SLOT(delabel);
1087
1088 lomac_copy(source, dest);
1089}
1090
1091static void
1092lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
1093 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1094 struct label *vplabel)
1095{
1096 struct mac_lomac *source, *dest;
1097
1098 source = SLOT(delabel);
1099 dest = SLOT(vplabel);
1100
1101 lomac_copy_single(source, dest);
1102}
1103
1104static int
1105lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1106 struct label *ifplabel, struct label *newlabel)
1107{
1108 struct mac_lomac *subj, *new;
1109 int error;
1110
1111 subj = SLOT(cred->cr_label);
1112 new = SLOT(newlabel);
1113
1114 /*
1115 * If there is a LOMAC label update for the interface, it may be an
1116 * update of the single, range, or both.
1117 */
1118 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1119 if (error)
1120 return (error);
1121
1122 /*
1123 * Relabling network interfaces requires LOMAC privilege.
1124 */
1125 error = lomac_subject_privileged(subj);
1126 if (error)
1127 return (error);
1128
1129 /*
1130 * If the LOMAC label is to be changed, authorize as appropriate.
1131 */
1132 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1133 /*
1134 * Fill in the missing parts from the previous label.
1135 */
1136 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1137 lomac_copy_single(subj, new);
1138 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1139 lomac_copy_range(subj, new);
1140
1141 /*
1142 * Rely on the traditional superuser status for the LOMAC
1143 * interface relabel requirements. XXXMAC: This will go
1144 * away.
1145 *
1146 * XXXRW: This is also redundant to a higher layer check.
1147 */
1148 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
1149 if (error)
1150 return (EPERM);
1151
1152 /*
1153 * XXXMAC: Additional consistency tests regarding the single
1154 * and the range of the new label might be performed here.
1155 */
1156 }
1157
1158 return (0);
1159}
1160
1161static int
1162lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1163 struct mbuf *m, struct label *mlabel)
1164{
1165 struct mac_lomac *p, *i;
1166
1167 if (!lomac_enabled)
1168 return (0);
1169
1170 p = SLOT(mlabel);
1171 i = SLOT(ifplabel);
1172
1173 return (lomac_single_in_range(p, i) ? 0 : EACCES);
1174}
1175
1176static void
1177lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1178{
1179 char tifname[IFNAMSIZ], *p, *q;
1180 char tiflist[sizeof(trusted_interfaces)];
1181 struct mac_lomac *dest;
1182 int len, grade;
1183
1184 dest = SLOT(ifplabel);
1185
1186 if (ifp->if_type == IFT_LOOP) {
1187 grade = MAC_LOMAC_TYPE_EQUAL;
1188 goto set;
1189 }
1190
1191 if (trust_all_interfaces) {
1192 grade = MAC_LOMAC_TYPE_HIGH;
1193 goto set;
1194 }
1195
1196 grade = MAC_LOMAC_TYPE_LOW;
1197
1198 if (trusted_interfaces[0] == '\0' ||
1199 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1200 goto set;
1201
1202 bzero(tiflist, sizeof(tiflist));
1203 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1204 if(*p != ' ' && *p != '\t')
1205 *q = *p;
1206
1207 for (p = q = tiflist;; p++) {
1208 if (*p == ',' || *p == '\0') {
1209 len = p - q;
1210 if (len < IFNAMSIZ) {
1211 bzero(tifname, sizeof(tifname));
1212 bcopy(q, tifname, len);
1213 if (strcmp(tifname, ifp->if_xname) == 0) {
1214 grade = MAC_LOMAC_TYPE_HIGH;
1215 break;
1216 }
1217 }
1218 else {
1219 *p = '\0';
1220 printf("MAC/LOMAC warning: interface name "
1221 "\"%s\" is too long (must be < %d)\n",
1222 q, IFNAMSIZ);
1223 }
1224 if (*p == '\0')
1225 break;
1226 q = p + 1;
1227 }
1228 }
1229set:
1230 lomac_set_single(dest, grade, 0);
1231 lomac_set_range(dest, grade, 0, grade, 0);
1232}
1233
1234static void
1235lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1236 struct mbuf *m, struct label *mlabel)
1237{
1238 struct mac_lomac *source, *dest;
1239
1240 source = SLOT(ifplabel);
1241 dest = SLOT(mlabel);
1242
1243 lomac_copy_single(source, dest);
1244}
1245
1246static void
1247lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1248 struct label *ifplabel, struct label *newlabel)
1249{
1250 struct mac_lomac *source, *dest;
1251
1252 source = SLOT(newlabel);
1253 dest = SLOT(ifplabel);
1254
1255 try_relabel(source, dest);
1256}
1257
1258static int
1259lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1260 struct mbuf *m, struct label *mlabel)
1261{
1262 struct mac_lomac *p, *i;
1263
1264 if (!lomac_enabled)
1265 return (0);
1266
1267 p = SLOT(mlabel);
1268 i = SLOT(inplabel);
1269
1270 return (lomac_equal_single(p, i) ? 0 : EACCES);
1271}
1272
1273static int
1274lomac_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1275 struct label *inplabel)
1276{
1277 struct mac_lomac *subj, *obj;
1278
1279 if (!lomac_enabled)
1280 return (0);
1281
1282 subj = SLOT(cred->cr_label);
1283 obj = SLOT(inplabel);
1284
1285 if (!lomac_dominate_single(obj, subj))
1286 return (ENOENT);
1287
1288 return (0);
1289}
1290
1291static void
1292lomac_inpcb_create(struct socket *so, struct label *solabel,
1293 struct inpcb *inp, struct label *inplabel)
1294{
1295 struct mac_lomac *source, *dest;
1296
1297 source = SLOT(solabel);
1298 dest = SLOT(inplabel);
1299
1300 lomac_copy_single(source, dest);
1301}
1302
1303static void
1304lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1305 struct mbuf *m, struct label *mlabel)
1306{
1307 struct mac_lomac *source, *dest;
1308
1309 source = SLOT(inplabel);
1310 dest = SLOT(mlabel);
1311
1312 lomac_copy_single(source, dest);
1313}
1314
1315static void
1316lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1317 struct inpcb *inp, struct label *inplabel)
1318{
1319 struct mac_lomac *source, *dest;
1320
1321 SOCK_LOCK_ASSERT(so);
1322
1323 source = SLOT(solabel);
1324 dest = SLOT(inplabel);
1325
1326 lomac_copy_single(source, dest);
1327}
1328
1329static void
1330lomac_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1331 struct label *q6label)
1332{
1333 struct mac_lomac *source, *dest;
1334
1335 source = SLOT(mlabel);
1336 dest = SLOT(q6label);
1337
1338 lomac_copy_single(source, dest);
1339}
1340
1341static int
1342lomac_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1343 struct label *q6label)
1344{
1345 struct mac_lomac *a, *b;
1346
1347 a = SLOT(q6label);
1348 b = SLOT(mlabel);
1349
1350 return (lomac_equal_single(a, b));
1351}
1352
1353static void
1354lomac_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1355 struct label *mlabel)
1356{
1357 struct mac_lomac *source, *dest;
1358
1359 source = SLOT(q6label);
1360 dest = SLOT(mlabel);
1361
1362 /* Just use the head, since we require them all to match. */
1363 lomac_copy_single(source, dest);
1364}
1365
1366static void
1367lomac_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1368 struct label *q6label)
1369{
1370
1371 /* NOOP: we only accept matching labels, so no need to update */
1372}
1373
1374static void
1375lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1376 struct label *qlabel)
1377{
1378 struct mac_lomac *source, *dest;
1379
1380 source = SLOT(mlabel);
1381 dest = SLOT(qlabel);
1382
1383 lomac_copy_single(source, dest);
1384}
1385
1386static int
1387lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1388 struct label *qlabel)
1389{
1390 struct mac_lomac *a, *b;
1391
1392 a = SLOT(qlabel);
1393 b = SLOT(mlabel);
1394
1395 return (lomac_equal_single(a, b));
1396}
1397
1398static void
1399lomac_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1400 struct label *mlabel)
1401{
1402 struct mac_lomac *source, *dest;
1403
1404 source = SLOT(qlabel);
1405 dest = SLOT(mlabel);
1406
1407 /* Just use the head, since we require them all to match. */
1408 lomac_copy_single(source, dest);
1409}
1410
1411static void
1412lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1413 struct label *qlabel)
1414{
1415
1416 /* NOOP: we only accept matching labels, so no need to update */
1417}
1418
1419static int
1420lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
1421 struct label *vplabel)
1422{
1423 struct mac_lomac *subj, *obj;
1424
1425 if (!lomac_enabled)
1426 return (0);
1427
1428 subj = SLOT(cred->cr_label);
1429 obj = SLOT(vplabel);
1430
1431 if (lomac_subject_privileged(subj))
1432 return (EPERM);
1433
1434 if (!lomac_high_single(obj))
1435 return (EACCES);
1436
1437 return (0);
1438}
1439
1440static void
1441lomac_mount_create(struct ucred *cred, struct mount *mp,
1442 struct label *mplabel)
1443{
1444 struct mac_lomac *source, *dest;
1445
1446 source = SLOT(cred->cr_label);
1447 dest = SLOT(mplabel);
1448 lomac_copy_single(source, dest);
1449}
1450
1451static void
1452lomac_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel,
1453 struct mbuf *m, struct label *mlabel)
1454{
1455 struct mac_lomac *dest;
1456
1457 dest = SLOT(mlabel);
1458
1459 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1460}
1461
1462static void
1463lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1464 struct mbuf *m, struct label *mlabel)
1465{
1466 struct mac_lomac *dest;
1467
1468 dest = SLOT(mlabel);
1469
1470 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1471}
1472
1473static void
1474lomac_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1475 struct mbuf *msend, struct label *msendlabel)
1476{
1477 struct mac_lomac *source, *dest;
1478
1479 source = SLOT(mrecvlabel);
1480 dest = SLOT(msendlabel);
1481
1482 lomac_copy_single(source, dest);
1483}
1484
1485static void
1486lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1487{
1488 struct mac_lomac *dest;
1489
1490 dest = SLOT(mlabel);
1491
1492 /* XXX: where is the label for the firewall really comming from? */
1493 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1494}
1495
1496static void
1497lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
1498 struct mbuf *frag, struct label *fraglabel)
1499{
1500 struct mac_lomac *source, *dest;
1501
1502 source = SLOT(mlabel);
1503 dest = SLOT(fraglabel);
1504
1505 lomac_copy_single(source, dest);
1506}
1507
1508static void
1509lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1510 struct mbuf *msend, struct label *msendlabel)
1511{
1512 struct mac_lomac *source, *dest;
1513
1514 source = SLOT(mrecvlabel);
1515 dest = SLOT(msendlabel);
1516
1517 lomac_copy_single(source, dest);
1518}
1519
1520static void
1521lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1522 struct mbuf *m, struct label *mlabel)
1523{
1524 struct mac_lomac *dest;
1525
1526 dest = SLOT(mlabel);
1527
1528 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1529}
1530
1531static void
1532lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1533 struct mbuf *m, struct label *mlabel)
1534{
1535 struct mac_lomac *dest;
1536
1537 dest = SLOT(mlabel);
1538
1539 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1540}
1541
1542static int
1543lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1544 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1545{
1546
1547 if (!lomac_enabled)
1548 return (0);
1549
1550 /* XXX: This will be implemented soon... */
1551
1552 return (0);
1553}
1554
1555static int
1556lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1557 struct label *pplabel)
1558{
1559 struct mac_lomac *subj, *obj;
1560
1561 if (!lomac_enabled)
1562 return (0);
1563
1564 subj = SLOT(cred->cr_label);
1565 obj = SLOT(pplabel);
1566
1567 if (!lomac_dominate_single(obj, subj))
1568 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1569
1570 return (0);
1571}
1572
1573static int
1574lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1575 struct label *pplabel, struct label *newlabel)
1576{
1577 struct mac_lomac *subj, *obj, *new;
1578 int error;
1579
1580 new = SLOT(newlabel);
1581 subj = SLOT(cred->cr_label);
1582 obj = SLOT(pplabel);
1583
1584 /*
1585 * If there is a LOMAC label update for a pipe, it must be a single
1586 * update.
1587 */
1588 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1589 if (error)
1590 return (error);
1591
1592 /*
1593 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1594 * authorize the relabel.
1595 */
1596 if (!lomac_single_in_range(obj, subj))
1597 return (EPERM);
1598
1599 /*
1600 * If the LOMAC label is to be changed, authorize as appropriate.
1601 */
1602 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1603 /*
1604 * To change the LOMAC label on a pipe, the new pipe label
1605 * must be in the subject range.
1606 */
1607 if (!lomac_single_in_range(new, subj))
1608 return (EPERM);
1609
1610 /*
1611 * To change the LOMAC label on a pipe to be EQUAL, the
1612 * subject must have appropriate privilege.
1613 */
1614 if (lomac_contains_equal(new)) {
1615 error = lomac_subject_privileged(subj);
1616 if (error)
1617 return (error);
1618 }
1619 }
1620
1621 return (0);
1622}
1623
1624static int
1625lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1626 struct label *pplabel)
1627{
1628 struct mac_lomac *subj, *obj;
1629
1630 if (!lomac_enabled)
1631 return (0);
1632
1633 subj = SLOT(cred->cr_label);
1634 obj = SLOT(pplabel);
1635
1636 if (!lomac_subject_dominate(subj, obj))
1637 return (EACCES);
1638
1639 return (0);
1640}
1641
1642static void
1643lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
1644 struct label *pplabel)
1645{
1646 struct mac_lomac *source, *dest;
1647
1648 source = SLOT(cred->cr_label);
1649 dest = SLOT(pplabel);
1650
1651 lomac_copy_single(source, dest);
1652}
1653
1654static void
1655lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1656 struct label *pplabel, struct label *newlabel)
1657{
1658 struct mac_lomac *source, *dest;
1659
1660 source = SLOT(newlabel);
1661 dest = SLOT(pplabel);
1662
1663 try_relabel(source, dest);
1664}
1665
1666/*
1667 * Some system privileges are allowed regardless of integrity grade; others
1668 * are allowed only when running with privilege with respect to the LOMAC
1669 * policy as they might otherwise allow bypassing of the integrity policy.
1670 */
1671static int
1672lomac_priv_check(struct ucred *cred, int priv)
1673{
1674 struct mac_lomac *subj;
1675 int error;
1676
1677 if (!lomac_enabled)
1678 return (0);
1679
1680 /*
1681 * Exempt only specific privileges from the LOMAC integrity policy.
1682 */
1683 switch (priv) {
1684 case PRIV_KTRACE:
1685 case PRIV_MSGBUF:
1686
1687 /*
1688 * Allow processes to manipulate basic process audit properties, and
1689 * to submit audit records.
1690 */
1691 case PRIV_AUDIT_GETAUDIT:
1692 case PRIV_AUDIT_SETAUDIT:
1693 case PRIV_AUDIT_SUBMIT:
1694
1695 /*
1696 * Allow processes to manipulate their regular UNIX credentials.
1697 */
1698 case PRIV_CRED_SETUID:
1699 case PRIV_CRED_SETEUID:
1700 case PRIV_CRED_SETGID:
1701 case PRIV_CRED_SETEGID:
1702 case PRIV_CRED_SETGROUPS:
1703 case PRIV_CRED_SETREUID:
1704 case PRIV_CRED_SETREGID:
1705 case PRIV_CRED_SETRESUID:
1706 case PRIV_CRED_SETRESGID:
1707
1708 /*
1709 * Allow processes to perform system monitoring.
1710 */
1711 case PRIV_SEEOTHERGIDS:
1712 case PRIV_SEEOTHERUIDS:
1713 break;
1714
1715 /*
1716 * Allow access to general process debugging facilities. We
1717 * separately control debugging based on MAC label.
1718 */
1719 case PRIV_DEBUG_DIFFCRED:
1720 case PRIV_DEBUG_SUGID:
1721 case PRIV_DEBUG_UNPRIV:
1722
1723 /*
1724 * Allow manipulating jails.
1725 */
1726 case PRIV_JAIL_ATTACH:
1727
1728 /*
1729 * Allow privilege with respect to the Partition policy, but not the
1730 * Privs policy.
1731 */
1732 case PRIV_MAC_PARTITION:
1733
1734 /*
1735 * Allow privilege with respect to process resource limits and login
1736 * context.
1737 */
1738 case PRIV_PROC_LIMIT:
1739 case PRIV_PROC_SETLOGIN:
1740 case PRIV_PROC_SETRLIMIT:
1741
1742 /*
1743 * Allow System V and POSIX IPC privileges.
1744 */
1745 case PRIV_IPC_READ:
1746 case PRIV_IPC_WRITE:
1747 case PRIV_IPC_ADMIN:
1748 case PRIV_IPC_MSGSIZE:
1749 case PRIV_MQ_ADMIN:
1750
1751 /*
1752 * Allow certain scheduler manipulations -- possibly this should be
1753 * controlled by more fine-grained policy, as potentially low
1754 * integrity processes can deny CPU to higher integrity ones.
1755 */
1756 case PRIV_SCHED_DIFFCRED:
1757 case PRIV_SCHED_SETPRIORITY:
1758 case PRIV_SCHED_RTPRIO:
1759 case PRIV_SCHED_SETPOLICY:
1760 case PRIV_SCHED_SET:
1761 case PRIV_SCHED_SETPARAM:
1762
1763 /*
1764 * More IPC privileges.
1765 */
1766 case PRIV_SEM_WRITE:
1767
1768 /*
1769 * Allow signaling privileges subject to integrity policy.
1770 */
1771 case PRIV_SIGNAL_DIFFCRED:
1772 case PRIV_SIGNAL_SUGID:
1773
1774 /*
1775 * Allow access to only limited sysctls from lower integrity levels;
1776 * piggy-back on the Jail definition.
1777 */
1778 case PRIV_SYSCTL_WRITEJAIL:
1779
1780 /*
1781 * Allow TTY-based privileges, subject to general device access using
1782 * labels on TTY device nodes, but not console privilege.
1783 */
1784 case PRIV_TTY_DRAINWAIT:
1785 case PRIV_TTY_DTRWAIT:
1786 case PRIV_TTY_EXCLUSIVE:
1787 case PRIV_TTY_STI:
1788 case PRIV_TTY_SETA:
1789
1790 /*
1791 * Grant most VFS privileges, as almost all are in practice bounded
1792 * by more specific checks using labels.
1793 */
1794 case PRIV_VFS_READ:
1795 case PRIV_VFS_WRITE:
1796 case PRIV_VFS_ADMIN:
1797 case PRIV_VFS_EXEC:
1798 case PRIV_VFS_LOOKUP:
1799 case PRIV_VFS_CHFLAGS_DEV:
1800 case PRIV_VFS_CHOWN:
1801 case PRIV_VFS_CHROOT:
1802 case PRIV_VFS_RETAINSUGID:
1803 case PRIV_VFS_EXCEEDQUOTA:
1804 case PRIV_VFS_FCHROOT:
1805 case PRIV_VFS_FHOPEN:
1806 case PRIV_VFS_FHSTATFS:
1807 case PRIV_VFS_GENERATION:
1808 case PRIV_VFS_GETFH:
1809 case PRIV_VFS_GETQUOTA:
1810 case PRIV_VFS_LINK:
1811 case PRIV_VFS_MOUNT:
1812 case PRIV_VFS_MOUNT_OWNER:
1813 case PRIV_VFS_MOUNT_PERM:
1814 case PRIV_VFS_MOUNT_SUIDDIR:
1815 case PRIV_VFS_MOUNT_NONUSER:
1816 case PRIV_VFS_SETGID:
1817 case PRIV_VFS_STICKYFILE:
1818 case PRIV_VFS_SYSFLAGS:
1819 case PRIV_VFS_UNMOUNT:
1820
1821 /*
1822 * Allow VM privileges; it would be nice if these were subject to
1823 * resource limits.
1824 */
1825 case PRIV_VM_MADV_PROTECT:
1826 case PRIV_VM_MLOCK:
1827 case PRIV_VM_MUNLOCK:
1828 case PRIV_VM_SWAP_NOQUOTA:
1829 case PRIV_VM_SWAP_NORLIMIT:
1830
1831 /*
1832 * Allow some but not all network privileges. In general, dont allow
1833 * reconfiguring the network stack, just normal use.
1834 */
1835 case PRIV_NETATALK_RESERVEDPORT:
1836 case PRIV_NETINET_RESERVEDPORT:
1837 case PRIV_NETINET_RAW:
1838 case PRIV_NETINET_REUSEPORT:
1839 case PRIV_NETIPX_RESERVEDPORT:
1840 case PRIV_NETIPX_RAW:
1841 break;
1842
1843 /*
1844 * All remaining system privileges are allow only if the process
1845 * holds privilege with respect to the LOMAC policy.
1846 */
1847 default:
1848 subj = SLOT(cred->cr_label);
1849 error = lomac_subject_privileged(subj);
1850 if (error)
1851 return (error);
1852 }
1853 return (0);
1854}
1855
1856static int
1857lomac_proc_check_debug(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
1876static int
1877lomac_proc_check_sched(struct ucred *cred, struct proc *p)
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
1896static int
1897lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
1898{
1899 struct mac_lomac *subj, *obj;
1900
1901 if (!lomac_enabled)
1902 return (0);
1903
1904 subj = SLOT(cred->cr_label);
1905 obj = SLOT(p->p_ucred->cr_label);
1906
1907 /* XXX: range checks */
1908 if (!lomac_dominate_single(obj, subj))
1909 return (ESRCH);
1910 if (!lomac_subject_dominate(subj, obj))
1911 return (EACCES);
1912
1913 return (0);
1914}
1915
1916static void
1917lomac_proc_destroy_label(struct label *label)
1918{
1919
1920 mtx_destroy(&PSLOT(label)->mtx);
1921 free(PSLOT(label), M_LOMAC);
1922 PSLOT_SET(label, NULL);
1923}
1924
1925static void
1926lomac_proc_init_label(struct label *label)
1927{
1928
1929 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
1930 M_ZERO | M_WAITOK));
1931 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
1932}
1933
1934static int
1935lomac_socket_check_deliver(struct socket *so, struct label *solabel,
1936 struct mbuf *m, struct label *mlabel)
1937{
1938 struct mac_lomac *p, *s;
1939 int error;
1940
1941 if (!lomac_enabled)
1942 return (0);
1943
1944 p = SLOT(mlabel);
1945 s = SLOT(solabel);
1946
1947 SOCK_LOCK(so);
1948 error = lomac_equal_single(p, s) ? 0 : EACCES;
1949 SOCK_UNLOCK(so);
1950 return (error);
1951}
1952
1953static int
1954lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
1955 struct label *solabel, struct label *newlabel)
1956{
1957 struct mac_lomac *subj, *obj, *new;
1958 int error;
1959
1960 SOCK_LOCK_ASSERT(so);
1961
1962 new = SLOT(newlabel);
1963 subj = SLOT(cred->cr_label);
1964 obj = SLOT(solabel);
1965
1966 /*
1967 * If there is a LOMAC label update for the socket, it may be an
1968 * update of single.
1969 */
1970 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1971 if (error)
1972 return (error);
1973
1974 /*
1975 * To relabel a socket, the old socket single must be in the subject
1976 * range.
1977 */
1978 if (!lomac_single_in_range(obj, subj))
1979 return (EPERM);
1980
1981 /*
1982 * If the LOMAC label is to be changed, authorize as appropriate.
1983 */
1984 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1985 /*
1986 * To relabel a socket, the new socket single must be in the
1987 * subject range.
1988 */
1989 if (!lomac_single_in_range(new, subj))
1990 return (EPERM);
1991
1992 /*
1993 * To change the LOMAC label on the socket to contain EQUAL,
1994 * the subject must have appropriate privilege.
1995 */
1996 if (lomac_contains_equal(new)) {
1997 error = lomac_subject_privileged(subj);
1998 if (error)
1999 return (error);
2000 }
2001 }
2002
2003 return (0);
2004}
2005
2006static int
2007lomac_socket_check_visible(struct ucred *cred, struct socket *so,
2008 struct label *solabel)
2009{
2010 struct mac_lomac *subj, *obj;
2011
2012 if (!lomac_enabled)
2013 return (0);
2014
2015 subj = SLOT(cred->cr_label);
2016 obj = SLOT(solabel);
2017
2018 SOCK_LOCK(so);
2019 if (!lomac_dominate_single(obj, subj)) {
2020 SOCK_UNLOCK(so);
2021 return (ENOENT);
2022 }
2023 SOCK_UNLOCK(so);
2024
2025 return (0);
2026}
2027
2028static void
2029lomac_socket_create(struct ucred *cred, struct socket *so,
2030 struct label *solabel)
2031{
2032 struct mac_lomac *source, *dest;
2033
2034 source = SLOT(cred->cr_label);
2035 dest = SLOT(solabel);
2036
2037 lomac_copy_single(source, dest);
2038}
2039
2040static void
2041lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
2042 struct mbuf *m, struct label *mlabel)
2043{
2044 struct mac_lomac *source, *dest;
2045
2046 source = SLOT(solabel);
2047 dest = SLOT(mlabel);
2048
2049 SOCK_LOCK(so);
2050 lomac_copy_single(source, dest);
2051 SOCK_UNLOCK(so);
2052}
2053
2054static void
2055lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2056 struct socket *newso, struct label *newsolabel)
2057{
2058 struct mac_lomac source, *dest;
2059
2060 SOCK_LOCK(oldso);
2061 source = *SLOT(oldsolabel);
2062 SOCK_UNLOCK(oldso);
2063
2064 dest = SLOT(newsolabel);
2065
2066 SOCK_LOCK(newso);
2067 lomac_copy_single(&source, dest);
2068 SOCK_UNLOCK(newso);
2069}
2070
2071static void
2072lomac_socket_relabel(struct ucred *cred, struct socket *so,
2073 struct label *solabel, struct label *newlabel)
2074{
2075 struct mac_lomac *source, *dest;
2076
2077 SOCK_LOCK_ASSERT(so);
2078
2079 source = SLOT(newlabel);
2080 dest = SLOT(solabel);
2081
2082 try_relabel(source, dest);
2083}
2084
2085static void
2086lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2087 struct socket *so, struct label *sopeerlabel)
2088{
2089 struct mac_lomac *source, *dest;
2090
2091 source = SLOT(mlabel);
2092 dest = SLOT(sopeerlabel);
2093
2094 SOCK_LOCK(so);
2095 lomac_copy_single(source, dest);
2096 SOCK_UNLOCK(so);
2097}
2098
2099static void
2100lomac_socketpeer_set_from_socket(struct socket *oldso,
2101 struct label *oldsolabel, struct socket *newso,
2102 struct label *newsopeerlabel)
2103{
2104 struct mac_lomac source, *dest;
2105
2106 SOCK_LOCK(oldso);
2107 source = *SLOT(oldsolabel);
2108 SOCK_UNLOCK(oldso);
2109
2110 dest = SLOT(newsopeerlabel);
2111
2112 SOCK_LOCK(newso);
2113 lomac_copy_single(&source, dest);
2114 SOCK_UNLOCK(newso);
2115}
2116
2117static void
2118lomac_syncache_create(struct label *label, struct inpcb *inp)
2119{
2120 struct mac_lomac *source, *dest;
2121
2122 source = SLOT(inp->inp_label);
2123 dest = SLOT(label);
2124 lomac_copy(source, dest);
2125}
2126
2127static void
2128lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2129 struct label *mlabel)
2130{
2131 struct mac_lomac *source, *dest;
2132
2133 source = SLOT(sc_label);
2134 dest = SLOT(mlabel);
2135 lomac_copy(source, dest);
2136}
2137
2138static int
2139lomac_system_check_acct(struct ucred *cred, struct vnode *vp,
2140 struct label *vplabel)
2141{
2142 struct mac_lomac *subj, *obj;
2143
2144 if (!lomac_enabled)
2145 return (0);
2146
2147 subj = SLOT(cred->cr_label);
2148 obj = SLOT(vplabel);
2149
2150 if (lomac_subject_privileged(subj))
2151 return (EPERM);
2152
2153 if (!lomac_high_single(obj))
2154 return (EACCES);
2155
2156 return (0);
2157}
2158
2159static int
2160lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2161 struct label *vplabel)
2162{
2163 struct mac_lomac *subj, *obj;
2164
2165 if (!lomac_enabled)
2166 return (0);
2167
2168 subj = SLOT(cred->cr_label);
2169 obj = SLOT(vplabel);
2170
2171 if (lomac_subject_privileged(subj))
2172 return (EPERM);
2173
2174 if (!lomac_high_single(obj))
2175 return (EACCES);
2176
2177 return (0);
2178}
2179
2180static int
2181lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2182 struct label *vplabel)
2183{
2184 struct mac_lomac *subj;
2185
2186 if (!lomac_enabled)
2187 return (0);
2188
2189 subj = SLOT(cred->cr_label);
2190
2191 if (lomac_subject_privileged(subj))
2192 return (EPERM);
2193
2194 return (0);
2195}
2196
2197static int
2198lomac_system_check_swapon(struct ucred *cred, struct vnode *vp,
2199 struct label *vplabel)
2200{
2201 struct mac_lomac *subj, *obj;
2202
2203 if (!lomac_enabled)
2204 return (0);
2205
2206 subj = SLOT(cred->cr_label);
2207 obj = SLOT(vplabel);
2208
2209 if (lomac_subject_privileged(subj))
2210 return (EPERM);
2211
2212 if (!lomac_high_single(obj))
2213 return (EACCES);
2214
2215 return (0);
2216}
2217
2218static int
2219lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2220 void *arg1, int arg2, struct sysctl_req *req)
2221{
2222 struct mac_lomac *subj;
2223
2224 if (!lomac_enabled)
2225 return (0);
2226
2227 subj = SLOT(cred->cr_label);
2228
2229 /*
2230 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high,
2231 * but also require privilege to change them.
2232 */
2233 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2234#ifdef notdef
2235 if (!lomac_subject_dominate_high(subj))
2236 return (EACCES);
2237#endif
2238
2239 if (lomac_subject_privileged(subj))
2240 return (EPERM);
2241 }
2242
2243 return (0);
2244}
2245
2246static void
2247lomac_thread_userret(struct thread *td)
2248{
2249 struct proc *p = td->td_proc;
2250 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2251 struct ucred *newcred, *oldcred;
2252 int dodrop;
2253
2254 mtx_lock(&subj->mtx);
2255 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2256 dodrop = 0;
2257 mtx_unlock(&subj->mtx);
2258 newcred = crget();
2259 /*
2260 * Prevent a lock order reversal in mac_proc_vm_revoke;
2261 * ideally, the other user of subj->mtx wouldn't be holding
2262 * Giant.
2263 */
2264 mtx_lock(&Giant);
2265 PROC_LOCK(p);
2266 mtx_lock(&subj->mtx);
2267 /*
2268 * Check if we lost the race while allocating the cred.
2269 */
2270 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2271 crfree(newcred);
2272 goto out;
2273 }
2274 oldcred = p->p_ucred;
2275 crcopy(newcred, oldcred);
2276 crhold(newcred);
2277 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2278 p->p_ucred = newcred;
2279 crfree(oldcred);
2280 dodrop = 1;
2281 out:
2282 mtx_unlock(&subj->mtx);
2283 PROC_UNLOCK(p);
2284 if (dodrop)
2285 mac_proc_vm_revoke(curthread);
2286 mtx_unlock(&Giant);
2287 } else {
2288 mtx_unlock(&subj->mtx);
2289 }
2290}
2291
2292static int
2293lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2294 struct vnode *vp, struct label *vplabel)
2295{
2296 struct mac_lomac ml_temp, *source, *dest;
2297 int buflen, error;
2298
2299 source = SLOT(mplabel);
2300 dest = SLOT(vplabel);
2301
2302 buflen = sizeof(ml_temp);
2303 bzero(&ml_temp, buflen);
2304
2305 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2306 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
2307 if (error == ENOATTR || error == EOPNOTSUPP) {
2308 /* Fall back to the mntlabel. */
2309 lomac_copy_single(source, dest);
2310 return (0);
2311 } else if (error)
2312 return (error);
2313
2314 if (buflen != sizeof(ml_temp)) {
2315 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
2316 printf("lomac_vnode_associate_extattr: bad size %d\n",
2317 buflen);
2318 return (EPERM);
2319 }
2320 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
2321 buflen = sizeof(ml_temp);
2322 (void)vn_extattr_set(vp, IO_NODELOCKED,
2323 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
2324 buflen, (char *)&ml_temp, curthread);
2325 }
2326 if (lomac_valid(&ml_temp) != 0) {
2327 printf("lomac_vnode_associate_extattr: invalid\n");
2328 return (EPERM);
2329 }
2330 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
2331 MAC_LOMAC_FLAG_SINGLE) {
2332 printf("lomac_vnode_associate_extattr: not single\n");
2333 return (EPERM);
2334 }
2335
2336 lomac_copy_single(&ml_temp, dest);
2337 return (0);
2338}
2339
2340static void
2341lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2342 struct vnode *vp, struct label *vplabel)
2343{
2344 struct mac_lomac *source, *dest;
2345
2346 source = SLOT(mplabel);
2347 dest = SLOT(vplabel);
2348
2349 lomac_copy_single(source, dest);
2350}
2351
2352static int
2353lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2354 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2355{
2356 struct mac_lomac *subj, *obj;
2357
2358 if (!lomac_enabled)
2359 return (0);
2360
2361 subj = SLOT(cred->cr_label);
2362 obj = SLOT(dvplabel);
2363
2364 if (!lomac_subject_dominate(subj, obj))
2365 return (EACCES);
2366 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2367 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2368 return (EACCES);
2369
2370 return (0);
2371}
2372
2373static int
2374lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2375 struct label *vplabel, acl_type_t type)
2376{
2377 struct mac_lomac *subj, *obj;
2378
2379 if (!lomac_enabled)
2380 return (0);
2381
2382 subj = SLOT(cred->cr_label);
2383 obj = SLOT(vplabel);
2384
2385 if (!lomac_subject_dominate(subj, obj))
2386 return (EACCES);
2387
2388 return (0);
2389}
2390
2391static int
2392lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
2393 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2394 struct componentname *cnp)
2395{
2396 struct mac_lomac *subj, *obj;
2397
2398 if (!lomac_enabled)
2399 return (0);
2400
2401 subj = SLOT(cred->cr_label);
2402 obj = SLOT(dvplabel);
2403
2404 if (!lomac_subject_dominate(subj, obj))
2405 return (EACCES);
2406
2407 obj = SLOT(vplabel);
2408
2409 if (!lomac_subject_dominate(subj, obj))
2410 return (EACCES);
2411
2412 return (0);
2413}
2414
2415static int
2416lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
2417 struct label *vplabel, int prot, int flags)
2418{
2419 struct mac_lomac *subj, *obj;
2420
2421 /*
2422 * Rely on the use of open()-time protections to handle
2423 * non-revocation cases.
2424 */
2425 if (!lomac_enabled)
2426 return (0);
2427
2428 subj = SLOT(cred->cr_label);
2429 obj = SLOT(vplabel);
2430
2431 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2432 if (!lomac_subject_dominate(subj, obj))
2433 return (EACCES);
2434 }
2435 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2436 if (!lomac_dominate_single(obj, subj))
2437 return (maybe_demote(subj, obj, "mapping", "file", vp));
2438 }
2439
2440 return (0);
2441}
2442
2443static void
2444lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2445 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2446{
2447 struct mac_lomac *subj, *obj;
2448
2449 /*
2450 * Rely on the use of open()-time protections to handle
2451 * non-revocation cases.
2452 */
2453 if (!lomac_enabled || !revocation_enabled)
2454 return;
2455
2456 subj = SLOT(cred->cr_label);
2457 obj = SLOT(vplabel);
2458
2459 if (!lomac_subject_dominate(subj, obj))
2460 *prot &= ~VM_PROT_WRITE;
2461}
2462
2463static int
2464lomac_vnode_check_open(struct ucred *cred, struct vnode *vp,
2465 struct label *vplabel, accmode_t accmode)
2466{
2467 struct mac_lomac *subj, *obj;
2468
2469 if (!lomac_enabled)
2470 return (0);
2471
2472 subj = SLOT(cred->cr_label);
2473 obj = SLOT(vplabel);
2474
2475 /* XXX privilege override for admin? */
2476 if (accmode & VMODIFY_PERMS) {
2477 if (!lomac_subject_dominate(subj, obj))
2478 return (EACCES);
2479 }
2480
2481 return (0);
2482}
2483
2484static int
2485lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
2486 struct vnode *vp, struct label *vplabel)
2487{
2488 struct mac_lomac *subj, *obj;
2489
2490 if (!lomac_enabled || !revocation_enabled)
2491 return (0);
2492
2493 subj = SLOT(active_cred->cr_label);
2494 obj = SLOT(vplabel);
2495
2496 if (!lomac_dominate_single(obj, subj))
2497 return (maybe_demote(subj, obj, "reading", "file", vp));
2498
2499 return (0);
2500}
2501
2502static int
2503lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
2504 struct label *vplabel, struct label *newlabel)
2505{
2506 struct mac_lomac *old, *new, *subj;
2507 int error;
2508
2509 old = SLOT(vplabel);
2510 new = SLOT(newlabel);
2511 subj = SLOT(cred->cr_label);
2512
2513 /*
2514 * If there is a LOMAC label update for the vnode, it must be a
2515 * single label, with an optional explicit auxiliary single.
2516 */
2517 error = lomac_atmostflags(new,
2518 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2519 if (error)
2520 return (error);
2521
2522 /*
2523 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2524 * authorize the relabel.
2525 */
2526 if (!lomac_single_in_range(old, subj))
2527 return (EPERM);
2528
2529 /*
2530 * If the LOMAC label is to be changed, authorize as appropriate.
2531 */
2532 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2533 /*
2534 * To change the LOMAC label on a vnode, the new vnode label
2535 * must be in the subject range.
2536 */
2537 if (!lomac_single_in_range(new, subj))
2538 return (EPERM);
2539
2540 /*
2541 * To change the LOMAC label on the vnode to be EQUAL, the
2542 * subject must have appropriate privilege.
2543 */
2544 if (lomac_contains_equal(new)) {
2545 error = lomac_subject_privileged(subj);
2546 if (error)
2547 return (error);
2548 }
2549 }
2550 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2551 /*
2552 * Fill in the missing parts from the previous label.
2553 */
2554 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2555 lomac_copy_single(subj, new);
2556
2557 /*
2558 * To change the auxiliary LOMAC label on a vnode, the new
2559 * vnode label must be in the subject range.
2560 */
2561 if (!lomac_auxsingle_in_range(new, subj))
2562 return (EPERM);
2563
2564 /*
2565 * To change the auxiliary LOMAC label on the vnode to be
2566 * EQUAL, the subject must have appropriate privilege.
2567 */
2568 if (lomac_contains_equal(new)) {
2569 error = lomac_subject_privileged(subj);
2570 if (error)
2571 return (error);
2572 }
2573 }
2574
2575 return (0);
2576}
2577
2578static int
2579lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
2580 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2581 struct componentname *cnp)
2582{
2583 struct mac_lomac *subj, *obj;
2584
2585 if (!lomac_enabled)
2586 return (0);
2587
2588 subj = SLOT(cred->cr_label);
2589 obj = SLOT(dvplabel);
2590
2591 if (!lomac_subject_dominate(subj, obj))
2592 return (EACCES);
2593
2594 obj = SLOT(vplabel);
2595
2596 if (!lomac_subject_dominate(subj, obj))
2597 return (EACCES);
2598
2599 return (0);
2600}
2601
2602static int
2603lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
2604 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2605 int samedir, struct componentname *cnp)
2606{
2607 struct mac_lomac *subj, *obj;
2608
2609 if (!lomac_enabled)
2610 return (0);
2611
2612 subj = SLOT(cred->cr_label);
2613 obj = SLOT(dvplabel);
2614
2615 if (!lomac_subject_dominate(subj, obj))
2616 return (EACCES);
2617
2618 if (vp != NULL) {
2619 obj = SLOT(vplabel);
2620
2621 if (!lomac_subject_dominate(subj, obj))
2622 return (EACCES);
2623 }
2624
2625 return (0);
2626}
2627
2628static int
2629lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
2630 struct label *vplabel)
2631{
2632 struct mac_lomac *subj, *obj;
2633
2634 if (!lomac_enabled)
2635 return (0);
2636
2637 subj = SLOT(cred->cr_label);
2638 obj = SLOT(vplabel);
2639
2640 if (!lomac_subject_dominate(subj, obj))
2641 return (EACCES);
2642
2643 return (0);
2644}
2645
2646static int
2647lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
2648 struct label *vplabel, acl_type_t type, struct acl *acl)
2649{
2650 struct mac_lomac *subj, *obj;
2651
2652 if (!lomac_enabled)
2653 return (0);
2654
2655 subj = SLOT(cred->cr_label);
2656 obj = SLOT(vplabel);
2657
2658 if (!lomac_subject_dominate(subj, obj))
2659 return (EACCES);
2660
2661 return (0);
2662}
2663
2664static int
2665lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
2666 struct label *vplabel, int attrnamespace, const char *name)
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 /* XXX: protect the MAC EA in a special way? */
2680
2681 return (0);
2682}
2683
2684static int
2685lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
2686 struct label *vplabel, u_long flags)
2687{
2688 struct mac_lomac *subj, *obj;
2689
2690 if (!lomac_enabled)
2691 return (0);
2692
2693 subj = SLOT(cred->cr_label);
2694 obj = SLOT(vplabel);
2695
2696 if (!lomac_subject_dominate(subj, obj))
2697 return (EACCES);
2698
2699 return (0);
2700}
2701
2702static int
2703lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
2704 struct label *vplabel, mode_t mode)
2705{
2706 struct mac_lomac *subj, *obj;
2707
2708 if (!lomac_enabled)
2709 return (0);
2710
2711 subj = SLOT(cred->cr_label);
2712 obj = SLOT(vplabel);
2713
2714 if (!lomac_subject_dominate(subj, obj))
2715 return (EACCES);
2716
2717 return (0);
2718}
2719
2720static int
2721lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
2722 struct label *vplabel, uid_t uid, gid_t gid)
2723{
2724 struct mac_lomac *subj, *obj;
2725
2726 if (!lomac_enabled)
2727 return (0);
2728
2729 subj = SLOT(cred->cr_label);
2730 obj = SLOT(vplabel);
2731
2732 if (!lomac_subject_dominate(subj, obj))
2733 return (EACCES);
2734
2735 return (0);
2736}
2737
2738static int
2739lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
2740 struct label *vplabel, struct timespec atime, struct timespec mtime)
2741{
2742 struct mac_lomac *subj, *obj;
2743
2744 if (!lomac_enabled)
2745 return (0);
2746
2747 subj = SLOT(cred->cr_label);
2748 obj = SLOT(vplabel);
2749
2750 if (!lomac_subject_dominate(subj, obj))
2751 return (EACCES);
2752
2753 return (0);
2754}
2755
2756static int
2757lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
2758 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2759 struct componentname *cnp)
2760{
2761 struct mac_lomac *subj, *obj;
2762
2763 if (!lomac_enabled)
2764 return (0);
2765
2766 subj = SLOT(cred->cr_label);
2767 obj = SLOT(dvplabel);
2768
2769 if (!lomac_subject_dominate(subj, obj))
2770 return (EACCES);
2771
2772 obj = SLOT(vplabel);
2773
2774 if (!lomac_subject_dominate(subj, obj))
2775 return (EACCES);
2776
2777 return (0);
2778}
2779
2780static int
2781lomac_vnode_check_write(struct ucred *active_cred,
2782 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2783{
2784 struct mac_lomac *subj, *obj;
2785
2786 if (!lomac_enabled || !revocation_enabled)
2787 return (0);
2788
2789 subj = SLOT(active_cred->cr_label);
2790 obj = SLOT(vplabel);
2791
2792 if (!lomac_subject_dominate(subj, obj))
2793 return (EACCES);
2794
2795 return (0);
2796}
2797
2798static int
2799lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
2800 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
2801 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
2802{
2803 struct mac_lomac *source, *dest, *dir, temp;
2804 size_t buflen;
2805 int error;
2806
2807 buflen = sizeof(temp);
2808 bzero(&temp, buflen);
2809
2810 source = SLOT(cred->cr_label);
2811 dest = SLOT(vplabel);
2812 dir = SLOT(dvplabel);
2813 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
2814 lomac_copy_auxsingle(dir, &temp);
2815 lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
2816 dir->ml_auxsingle.mle_grade);
2817 } else {
2818 lomac_copy_single(source, &temp);
2819 }
2820
2821 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2822 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2823 if (error == 0)
2824 lomac_copy(&temp, dest);
2825 return (error);
2826}
2827
2828static void
2829lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
2830 struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
2831 struct image_params *imgp, struct label *execlabel)
2832{
2833 struct mac_lomac *source, *dest, *obj, *robj;
2834
2835 source = SLOT(old->cr_label);
2836 dest = SLOT(new->cr_label);
2837 obj = SLOT(vplabel);
2838 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2839
2840 lomac_copy(source, dest);
2841 /*
2842 * If there's an auxiliary label on the real object, respect it and
2843 * assume that this level should be assumed immediately if a higher
2844 * level is currently in place.
2845 */
2846 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2847 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
2848 && lomac_auxsingle_in_range(robj, dest))
2849 lomac_set_single(dest, robj->ml_auxsingle.mle_type,
2850 robj->ml_auxsingle.mle_grade);
2851 /*
2852 * Restructuring to use the execve transitioning mechanism instead of
2853 * the normal demotion mechanism here would be difficult, so just
2854 * copy the label over and perform standard demotion. This is also
2855 * non-optimal because it will result in the intermediate label "new"
2856 * being created and immediately recycled.
2857 */
2858 if (lomac_enabled && revocation_enabled &&
2859 !lomac_dominate_single(obj, source))
2860 (void)maybe_demote(source, obj, "executing", "file", vp);
2861}
2862
2863static int
2864lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
2865 struct label *vplabel, struct label *interpvplabel,
2866 struct image_params *imgp, struct label *execlabel)
2867{
2868 struct mac_lomac *subj, *obj, *robj;
2869
2870 if (!lomac_enabled || !revocation_enabled)
2871 return (0);
2872
2873 subj = SLOT(old->cr_label);
2874 obj = SLOT(vplabel);
2875 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2876
2877 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2878 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
2879 && lomac_auxsingle_in_range(robj, subj)) ||
2880 !lomac_dominate_single(obj, subj));
2881}
2882
2883static void
2884lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
2885 struct label *vplabel, struct label *newlabel)
2886{
2887 struct mac_lomac *source, *dest;
2888
2889 source = SLOT(newlabel);
2890 dest = SLOT(vplabel);
2891
2892 try_relabel(source, dest);
2893}
2894
2895static int
2896lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
2897 struct label *vplabel, struct label *intlabel)
2898{
2899 struct mac_lomac *source, temp;
2900 size_t buflen;
2901 int error;
2902
2903 buflen = sizeof(temp);
2904 bzero(&temp, buflen);
2905
2906 source = SLOT(intlabel);
2907 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2908 return (0);
2909
2910 lomac_copy_single(source, &temp);
2911 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2912 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2913 return (error);
2914}
2915
2916static struct mac_policy_ops lomac_ops =
2917{
2918 .mpo_init = lomac_init,
2919
2920 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive,
2921 .mpo_bpfdesc_create = lomac_bpfdesc_create,
2922 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf,
2923 .mpo_bpfdesc_destroy_label = lomac_destroy_label,
2924 .mpo_bpfdesc_init_label = lomac_init_label,
2925
2926 .mpo_cred_check_relabel = lomac_cred_check_relabel,
2927 .mpo_cred_check_visible = lomac_cred_check_visible,
2928 .mpo_cred_copy_label = lomac_copy_label,
2929 .mpo_cred_create_swapper = lomac_cred_create_swapper,
2930 .mpo_cred_create_init = lomac_cred_create_init,
2931 .mpo_cred_destroy_label = lomac_destroy_label,
2932 .mpo_cred_externalize_label = lomac_externalize_label,
2933 .mpo_cred_init_label = lomac_init_label,
2934 .mpo_cred_internalize_label = lomac_internalize_label,
2935 .mpo_cred_relabel = lomac_cred_relabel,
2936
2937 .mpo_devfs_create_device = lomac_devfs_create_device,
2938 .mpo_devfs_create_directory = lomac_devfs_create_directory,
2939 .mpo_devfs_create_symlink = lomac_devfs_create_symlink,
2940 .mpo_devfs_destroy_label = lomac_destroy_label,
2941 .mpo_devfs_init_label = lomac_init_label,
2942 .mpo_devfs_update = lomac_devfs_update,
2943 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate,
2944
2945 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel,
2946 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit,
2947 .mpo_ifnet_copy_label = lomac_copy_label,
2948 .mpo_ifnet_create = lomac_ifnet_create,
2949 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf,
2950 .mpo_ifnet_destroy_label = lomac_destroy_label,
2951 .mpo_ifnet_externalize_label = lomac_externalize_label,
2952 .mpo_ifnet_init_label = lomac_init_label,
2953 .mpo_ifnet_internalize_label = lomac_internalize_label,
2954 .mpo_ifnet_relabel = lomac_ifnet_relabel,
2955
2956 .mpo_syncache_create = lomac_syncache_create,
2957 .mpo_syncache_destroy_label = lomac_destroy_label,
2958 .mpo_syncache_init_label = lomac_init_label_waitcheck,
2959
2960 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver,
2961 .mpo_inpcb_check_visible = lomac_inpcb_check_visible,
2962 .mpo_inpcb_create = lomac_inpcb_create,
2963 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf,
2964 .mpo_inpcb_destroy_label = lomac_destroy_label,
2965 .mpo_inpcb_init_label = lomac_init_label_waitcheck,
2966 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
2967
2968 .mpo_ip6q_create = lomac_ip6q_create,
2969 .mpo_ip6q_destroy_label = lomac_destroy_label,
2970 .mpo_ip6q_init_label = lomac_init_label_waitcheck,
2971 .mpo_ip6q_match = lomac_ip6q_match,
2972 .mpo_ip6q_reassemble = lomac_ip6q_reassemble,
2973 .mpo_ip6q_update = lomac_ip6q_update,
2974
2975 .mpo_ipq_create = lomac_ipq_create,
2976 .mpo_ipq_destroy_label = lomac_destroy_label,
2977 .mpo_ipq_init_label = lomac_init_label_waitcheck,
2978 .mpo_ipq_match = lomac_ipq_match,
2979 .mpo_ipq_reassemble = lomac_ipq_reassemble,
2980 .mpo_ipq_update = lomac_ipq_update,
2981
2982 .mpo_kld_check_load = lomac_kld_check_load,
2983
2984 .mpo_mbuf_copy_label = lomac_copy_label,
2985 .mpo_mbuf_destroy_label = lomac_destroy_label,
2986 .mpo_mbuf_init_label = lomac_init_label_waitcheck,
2987
2988 .mpo_mount_create = lomac_mount_create,
2989 .mpo_mount_destroy_label = lomac_destroy_label,
2990 .mpo_mount_init_label = lomac_init_label,
2991
2992 .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send,
2993
2994 .mpo_netinet_arp_send = lomac_netinet_arp_send,
2995 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply,
2996 .mpo_netinet_firewall_send = lomac_netinet_firewall_send,
2997 .mpo_netinet_fragment = lomac_netinet_fragment,
2998 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply,
2999 .mpo_netinet_igmp_send = lomac_netinet_igmp_send,
3000
3001 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send,
3002
3003 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl,
3004 .mpo_pipe_check_read = lomac_pipe_check_read,
3005 .mpo_pipe_check_relabel = lomac_pipe_check_relabel,
3006 .mpo_pipe_check_write = lomac_pipe_check_write,
3007 .mpo_pipe_copy_label = lomac_copy_label,
3008 .mpo_pipe_create = lomac_pipe_create,
3009 .mpo_pipe_destroy_label = lomac_destroy_label,
3010 .mpo_pipe_externalize_label = lomac_externalize_label,
3011 .mpo_pipe_init_label = lomac_init_label,
3012 .mpo_pipe_internalize_label = lomac_internalize_label,
3013 .mpo_pipe_relabel = lomac_pipe_relabel,
3014
3015 .mpo_priv_check = lomac_priv_check,
3016
3017 .mpo_proc_check_debug = lomac_proc_check_debug,
3018 .mpo_proc_check_sched = lomac_proc_check_sched,
3019 .mpo_proc_check_signal = lomac_proc_check_signal,
3020 .mpo_proc_destroy_label = lomac_proc_destroy_label,
3021 .mpo_proc_init_label = lomac_proc_init_label,
3022
3023 .mpo_socket_check_deliver = lomac_socket_check_deliver,
3024 .mpo_socket_check_relabel = lomac_socket_check_relabel,
3025 .mpo_socket_check_visible = lomac_socket_check_visible,
3026 .mpo_socket_copy_label = lomac_copy_label,
3027 .mpo_socket_create = lomac_socket_create,
3028 .mpo_socket_create_mbuf = lomac_socket_create_mbuf,
3029 .mpo_socket_destroy_label = lomac_destroy_label,
3030 .mpo_socket_externalize_label = lomac_externalize_label,
3031 .mpo_socket_init_label = lomac_init_label_waitcheck,
3032 .mpo_socket_internalize_label = lomac_internalize_label,
3033 .mpo_socket_newconn = lomac_socket_newconn,
3034 .mpo_socket_relabel = lomac_socket_relabel,
3035
3036 .mpo_socketpeer_destroy_label = lomac_destroy_label,
3037 .mpo_socketpeer_externalize_label = lomac_externalize_label,
3038 .mpo_socketpeer_init_label = lomac_init_label_waitcheck,
3039 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf,
3040 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket,
3041
3042 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf,
3043
3044 .mpo_system_check_acct = lomac_system_check_acct,
3045 .mpo_system_check_auditctl = lomac_system_check_auditctl,
3046 .mpo_system_check_swapoff = lomac_system_check_swapoff,
3047 .mpo_system_check_swapon = lomac_system_check_swapon,
3048 .mpo_system_check_sysctl = lomac_system_check_sysctl,
3049
3050 .mpo_thread_userret = lomac_thread_userret,
3051
3052 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr,
3053 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel,
3054 .mpo_vnode_check_access = lomac_vnode_check_open,
3055 .mpo_vnode_check_create = lomac_vnode_check_create,
3056 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl,
3057 .mpo_vnode_check_link = lomac_vnode_check_link,
3058 .mpo_vnode_check_mmap = lomac_vnode_check_mmap,
3059 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade,
3060 .mpo_vnode_check_open = lomac_vnode_check_open,
3061 .mpo_vnode_check_read = lomac_vnode_check_read,
3062 .mpo_vnode_check_relabel = lomac_vnode_check_relabel,
3063 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from,
3064 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to,
3065 .mpo_vnode_check_revoke = lomac_vnode_check_revoke,
3066 .mpo_vnode_check_setacl = lomac_vnode_check_setacl,
3067 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr,
3068 .mpo_vnode_check_setflags = lomac_vnode_check_setflags,
3069 .mpo_vnode_check_setmode = lomac_vnode_check_setmode,
3070 .mpo_vnode_check_setowner = lomac_vnode_check_setowner,
3071 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes,
3072 .mpo_vnode_check_unlink = lomac_vnode_check_unlink,
3073 .mpo_vnode_check_write = lomac_vnode_check_write,
3074 .mpo_vnode_copy_label = lomac_copy_label,
3075 .mpo_vnode_create_extattr = lomac_vnode_create_extattr,
3076 .mpo_vnode_destroy_label = lomac_destroy_label,
3077 .mpo_vnode_execve_transition = lomac_vnode_execve_transition,
3078 .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition,
3079 .mpo_vnode_externalize_label = lomac_externalize_label,
3080 .mpo_vnode_init_label = lomac_init_label,
3081 .mpo_vnode_internalize_label = lomac_internalize_label,
3082 .mpo_vnode_relabel = lomac_vnode_relabel,
3083 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr,
3084};
3085
3086MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
3087 MPC_LOADTIME_FLAG_NOTLATE, &lomac_slot);
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