2 * Copyright (c) 1999-2002, 2007 Robert N. M. Watson
3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
6 * This software was developed by Robert Watson for the TrustedBSD Project.
8 * This software was developed for the FreeBSD Project in part by NAI Labs,
9 * the Security Research Division of Network Associates, Inc. under
10 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
11 * CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * Developed by the TrustedBSD Project.
40 * Low-watermark floating label mandatory integrity policy.
43 #include <sys/types.h>
44 #include <sys/param.h>
47 #include <sys/extattr.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
51 #include <sys/mount.h>
55 #include <sys/systm.h>
56 #include <sys/sysproto.h>
57 #include <sys/sysent.h>
58 #include <sys/systm.h>
59 #include <sys/vnode.h>
61 #include <sys/socket.h>
62 #include <sys/socketvar.h>
65 #include <sys/sysctl.h>
66 #include <sys/syslog.h>
68 #include <fs/devfs/devfs.h>
70 #include <net/bpfdesc.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
75 #include <netinet/in.h>
76 #include <netinet/in_pcb.h>
77 #include <netinet/ip_var.h>
81 #include <security/mac/mac_policy.h>
82 #include <security/mac/mac_framework.h>
83 #include <security/mac_lomac/mac_lomac.h>
85 struct mac_lomac_proc {
86 struct mac_lomac mac_lomac;
90 SYSCTL_DECL(_security_mac);
92 SYSCTL_NODE(_security_mac, OID_AUTO, lomac, CTLFLAG_RW, 0,
93 "TrustedBSD mac_lomac policy controls");
95 static int mac_lomac_label_size = sizeof(struct mac_lomac);
96 SYSCTL_INT(_security_mac_lomac, OID_AUTO, label_size, CTLFLAG_RD,
97 &mac_lomac_label_size, 0, "Size of struct mac_lomac");
99 static int mac_lomac_enabled = 1;
100 SYSCTL_INT(_security_mac_lomac, OID_AUTO, enabled, CTLFLAG_RW,
101 &mac_lomac_enabled, 0, "Enforce MAC/LOMAC policy");
102 TUNABLE_INT("security.mac.lomac.enabled", &mac_lomac_enabled);
104 static int destroyed_not_inited;
105 SYSCTL_INT(_security_mac_lomac, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
106 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
108 static int trust_all_interfaces = 0;
109 SYSCTL_INT(_security_mac_lomac, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
110 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/LOMAC");
111 TUNABLE_INT("security.mac.lomac.trust_all_interfaces", &trust_all_interfaces);
113 static char trusted_interfaces[128];
114 SYSCTL_STRING(_security_mac_lomac, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
115 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/LOMAC");
116 TUNABLE_STR("security.mac.lomac.trusted_interfaces", trusted_interfaces,
117 sizeof(trusted_interfaces));
119 static int ptys_equal = 0;
120 SYSCTL_INT(_security_mac_lomac, OID_AUTO, ptys_equal, CTLFLAG_RW,
121 &ptys_equal, 0, "Label pty devices as lomac/equal on create");
122 TUNABLE_INT("security.mac.lomac.ptys_equal", &ptys_equal);
124 static int revocation_enabled = 1;
125 SYSCTL_INT(_security_mac_lomac, OID_AUTO, revocation_enabled, CTLFLAG_RW,
126 &revocation_enabled, 0, "Revoke access to objects on relabel");
127 TUNABLE_INT("security.mac.lomac.revocation_enabled", &revocation_enabled);
129 static int mac_lomac_slot;
130 #define SLOT(l) ((struct mac_lomac *)mac_label_get((l), mac_lomac_slot))
131 #define SLOT_SET(l, val) mac_label_set((l), mac_lomac_slot, (uintptr_t)(val))
132 #define PSLOT(l) ((struct mac_lomac_proc *) \
133 mac_label_get((l), mac_lomac_slot))
134 #define PSLOT_SET(l, val) mac_label_set((l), mac_lomac_slot, (uintptr_t)(val))
136 MALLOC_DEFINE(M_MACLOMAC, "mac_lomac_label", "MAC/LOMAC labels");
138 static struct mac_lomac *
139 lomac_alloc(int flag)
141 struct mac_lomac *mac_lomac;
143 mac_lomac = malloc(sizeof(struct mac_lomac), M_MACLOMAC, M_ZERO | flag);
149 lomac_free(struct mac_lomac *mac_lomac)
152 if (mac_lomac != NULL)
153 free(mac_lomac, M_MACLOMAC);
155 atomic_add_int(&destroyed_not_inited, 1);
159 lomac_atmostflags(struct mac_lomac *mac_lomac, int flags)
162 if ((mac_lomac->ml_flags & flags) != mac_lomac->ml_flags)
168 mac_lomac_dominate_element(struct mac_lomac_element *a,
169 struct mac_lomac_element *b)
172 switch (a->mle_type) {
173 case MAC_LOMAC_TYPE_EQUAL:
174 case MAC_LOMAC_TYPE_HIGH:
177 case MAC_LOMAC_TYPE_LOW:
178 switch (b->mle_type) {
179 case MAC_LOMAC_TYPE_GRADE:
180 case MAC_LOMAC_TYPE_HIGH:
183 case MAC_LOMAC_TYPE_EQUAL:
184 case MAC_LOMAC_TYPE_LOW:
188 panic("mac_lomac_dominate_element: b->mle_type invalid");
191 case MAC_LOMAC_TYPE_GRADE:
192 switch (b->mle_type) {
193 case MAC_LOMAC_TYPE_EQUAL:
194 case MAC_LOMAC_TYPE_LOW:
197 case MAC_LOMAC_TYPE_HIGH:
200 case MAC_LOMAC_TYPE_GRADE:
201 return (a->mle_grade >= b->mle_grade);
204 panic("mac_lomac_dominate_element: b->mle_type invalid");
208 panic("mac_lomac_dominate_element: a->mle_type invalid");
213 mac_lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
216 return (mac_lomac_dominate_element(&rangeb->ml_rangehigh,
217 &rangea->ml_rangehigh) &&
218 mac_lomac_dominate_element(&rangea->ml_rangelow,
219 &rangeb->ml_rangelow));
223 mac_lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
226 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
227 ("mac_lomac_single_in_range: a not single"));
228 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
229 ("mac_lomac_single_in_range: b not range"));
231 return (mac_lomac_dominate_element(&range->ml_rangehigh,
232 &single->ml_single) &&
233 mac_lomac_dominate_element(&single->ml_single,
234 &range->ml_rangelow));
238 mac_lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
241 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
242 ("mac_lomac_single_in_range: a not auxsingle"));
243 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
244 ("mac_lomac_single_in_range: b not range"));
246 return (mac_lomac_dominate_element(&range->ml_rangehigh,
247 &single->ml_auxsingle) &&
248 mac_lomac_dominate_element(&single->ml_auxsingle,
249 &range->ml_rangelow));
253 mac_lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
255 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
256 ("mac_lomac_dominate_single: a not single"));
257 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
258 ("mac_lomac_dominate_single: b not single"));
260 return (mac_lomac_dominate_element(&a->ml_single, &b->ml_single));
264 mac_lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
266 KASSERT((~a->ml_flags &
267 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
268 ("mac_lomac_dominate_single: a not subject"));
269 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
270 ("mac_lomac_dominate_single: b not single"));
272 return (mac_lomac_dominate_element(&a->ml_rangehigh,
277 mac_lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
280 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
281 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
284 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
288 mac_lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
291 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
292 ("mac_lomac_equal_single: a not single"));
293 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
294 ("mac_lomac_equal_single: b not single"));
296 return (mac_lomac_equal_element(&a->ml_single, &b->ml_single));
300 mac_lomac_contains_equal(struct mac_lomac *mac_lomac)
303 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE)
304 if (mac_lomac->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
306 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_AUX)
307 if (mac_lomac->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
310 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_RANGE) {
311 if (mac_lomac->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
313 if (mac_lomac->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
321 mac_lomac_subject_privileged(struct mac_lomac *mac_lomac)
324 KASSERT((mac_lomac->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
325 MAC_LOMAC_FLAGS_BOTH,
326 ("mac_lomac_subject_privileged: subject doesn't have both labels"));
328 /* If the single is EQUAL, it's ok. */
329 if (mac_lomac->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
332 /* If either range endpoint is EQUAL, it's ok. */
333 if (mac_lomac->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
334 mac_lomac->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
337 /* If the range is low-high, it's ok. */
338 if (mac_lomac->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
339 mac_lomac->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
347 mac_lomac_high_single(struct mac_lomac *mac_lomac)
350 KASSERT((mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
351 ("mac_lomac_high_single: mac_lomac not single"));
353 return (mac_lomac->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
357 mac_lomac_valid(struct mac_lomac *mac_lomac)
360 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
361 switch (mac_lomac->ml_single.mle_type) {
362 case MAC_LOMAC_TYPE_GRADE:
363 case MAC_LOMAC_TYPE_EQUAL:
364 case MAC_LOMAC_TYPE_HIGH:
365 case MAC_LOMAC_TYPE_LOW:
372 if (mac_lomac->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
376 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_AUX) {
377 switch (mac_lomac->ml_auxsingle.mle_type) {
378 case MAC_LOMAC_TYPE_GRADE:
379 case MAC_LOMAC_TYPE_EQUAL:
380 case MAC_LOMAC_TYPE_HIGH:
381 case MAC_LOMAC_TYPE_LOW:
388 if (mac_lomac->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
392 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_RANGE) {
393 switch (mac_lomac->ml_rangelow.mle_type) {
394 case MAC_LOMAC_TYPE_GRADE:
395 case MAC_LOMAC_TYPE_EQUAL:
396 case MAC_LOMAC_TYPE_HIGH:
397 case MAC_LOMAC_TYPE_LOW:
404 switch (mac_lomac->ml_rangehigh.mle_type) {
405 case MAC_LOMAC_TYPE_GRADE:
406 case MAC_LOMAC_TYPE_EQUAL:
407 case MAC_LOMAC_TYPE_HIGH:
408 case MAC_LOMAC_TYPE_LOW:
414 if (!mac_lomac_dominate_element(&mac_lomac->ml_rangehigh,
415 &mac_lomac->ml_rangelow))
418 if (mac_lomac->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
419 mac_lomac->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
427 mac_lomac_set_range(struct mac_lomac *mac_lomac, u_short typelow,
428 u_short gradelow, u_short typehigh, u_short gradehigh)
431 mac_lomac->ml_rangelow.mle_type = typelow;
432 mac_lomac->ml_rangelow.mle_grade = gradelow;
433 mac_lomac->ml_rangehigh.mle_type = typehigh;
434 mac_lomac->ml_rangehigh.mle_grade = gradehigh;
435 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_RANGE;
439 mac_lomac_set_single(struct mac_lomac *mac_lomac, u_short type, u_short grade)
442 mac_lomac->ml_single.mle_type = type;
443 mac_lomac->ml_single.mle_grade = grade;
444 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
448 mac_lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
451 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
452 ("mac_lomac_copy_range: labelfrom not range"));
454 labelto->ml_rangelow = labelfrom->ml_rangelow;
455 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
456 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
460 mac_lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
463 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
464 ("mac_lomac_copy_single: labelfrom not single"));
466 labelto->ml_single = labelfrom->ml_single;
467 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
471 mac_lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
474 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
475 ("mac_lomac_copy_auxsingle: labelfrom not auxsingle"));
477 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
478 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
482 mac_lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
485 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
486 mac_lomac_copy_single(source, dest);
487 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
488 mac_lomac_copy_auxsingle(source, dest);
489 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
490 mac_lomac_copy_range(source, dest);
493 static int mac_lomac_to_string(struct sbuf *sb,
494 struct mac_lomac *mac_lomac);
497 maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
498 const char *actionname, const char *objname, struct vnode *vp)
500 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
501 char *subjlabeltext, *objlabeltext, *subjtext;
502 struct mac_lomac cached_subjlabel;
503 struct mac_lomac_proc *subj;
508 subj = PSLOT(curthread->td_proc->p_label);
510 p = curthread->td_proc;
511 mtx_lock(&subj->mtx);
512 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
514 * Check to see if the pending demotion would be more or
515 * less severe than this one, and keep the more severe.
516 * This can only happen for a multi-threaded application.
518 if (mac_lomac_dominate_single(objlabel, &subj->mac_lomac)) {
519 mtx_unlock(&subj->mtx);
523 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
525 * Always demote the single label.
527 mac_lomac_copy_single(objlabel, &subj->mac_lomac);
529 * Start with the original range, then minimize each side of
530 * the range to the point of not dominating the object. The
531 * high side will always be demoted, of course.
533 mac_lomac_copy_range(subjlabel, &subj->mac_lomac);
534 if (!mac_lomac_dominate_element(&objlabel->ml_single,
535 &subj->mac_lomac.ml_rangelow))
536 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
537 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
538 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
539 thread_lock(curthread);
540 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND;
541 thread_unlock(curthread);
544 * Avoid memory allocation while holding a mutex; cache the
547 mac_lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
548 mtx_unlock(&subj->mtx);
550 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
551 mac_lomac_to_string(&subjlabel_sb, subjlabel);
552 sbuf_finish(&subjlabel_sb);
553 subjlabeltext = sbuf_data(&subjlabel_sb);
555 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
556 mac_lomac_to_string(&subjtext_sb, &subj->mac_lomac);
557 sbuf_finish(&subjtext_sb);
558 subjtext = sbuf_data(&subjtext_sb);
560 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
561 mac_lomac_to_string(&objlabel_sb, objlabel);
562 sbuf_finish(&objlabel_sb);
563 objlabeltext = sbuf_data(&objlabel_sb);
565 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
566 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred,
568 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
569 " level %s after %s a level-%s %s (inode=%ld, "
571 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
572 p->p_comm, subjtext, actionname, objlabeltext, objname,
573 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
575 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
576 " level %s after %s a level-%s %s\n",
577 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
578 p->p_comm, subjtext, actionname, objlabeltext, objname);
581 sbuf_delete(&subjlabel_sb);
582 sbuf_delete(&subjtext_sb);
583 sbuf_delete(&objlabel_sb);
589 * Relabel "to" to "from" only if "from" is a valid label (contains
590 * at least a single), as for a relabel operation which may or may
591 * not involve a relevant label.
594 try_relabel(struct mac_lomac *from, struct mac_lomac *to)
597 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
598 bzero(to, sizeof(*to));
599 mac_lomac_copy(from, to);
604 * Policy module operations.
607 mac_lomac_init(struct mac_policy_conf *conf)
616 mac_lomac_init_label(struct label *label)
619 SLOT_SET(label, lomac_alloc(M_WAITOK));
623 mac_lomac_init_label_waitcheck(struct label *label, int flag)
626 SLOT_SET(label, lomac_alloc(flag));
627 if (SLOT(label) == NULL)
634 mac_lomac_init_proc_label(struct label *label)
637 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_MACLOMAC,
639 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
643 mac_lomac_destroy_label(struct label *label)
646 lomac_free(SLOT(label));
647 SLOT_SET(label, NULL);
651 mac_lomac_destroy_proc_label(struct label *label)
654 mtx_destroy(&PSLOT(label)->mtx);
655 FREE(PSLOT(label), M_MACLOMAC);
656 PSLOT_SET(label, NULL);
660 mac_lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
663 switch (element->mle_type) {
664 case MAC_LOMAC_TYPE_HIGH:
665 return (sbuf_printf(sb, "high"));
667 case MAC_LOMAC_TYPE_LOW:
668 return (sbuf_printf(sb, "low"));
670 case MAC_LOMAC_TYPE_EQUAL:
671 return (sbuf_printf(sb, "equal"));
673 case MAC_LOMAC_TYPE_GRADE:
674 return (sbuf_printf(sb, "%d", element->mle_grade));
677 panic("mac_lomac_element_to_string: invalid type (%d)",
683 mac_lomac_to_string(struct sbuf *sb, struct mac_lomac *mac_lomac)
686 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
687 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_single)
692 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_AUX) {
693 if (sbuf_putc(sb, '[') == -1)
696 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_auxsingle)
700 if (sbuf_putc(sb, ']') == -1)
704 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_RANGE) {
705 if (sbuf_putc(sb, '(') == -1)
708 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_rangelow)
712 if (sbuf_putc(sb, '-') == -1)
715 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_rangehigh)
719 if (sbuf_putc(sb, ')') == -1)
727 mac_lomac_externalize_label(struct label *label, char *element_name,
728 struct sbuf *sb, int *claimed)
730 struct mac_lomac *mac_lomac;
732 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
737 mac_lomac = SLOT(label);
739 return (mac_lomac_to_string(sb, mac_lomac));
743 mac_lomac_parse_element(struct mac_lomac_element *element, char *string)
746 if (strcmp(string, "high") == 0 ||
747 strcmp(string, "hi") == 0) {
748 element->mle_type = MAC_LOMAC_TYPE_HIGH;
749 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
750 } else if (strcmp(string, "low") == 0 ||
751 strcmp(string, "lo") == 0) {
752 element->mle_type = MAC_LOMAC_TYPE_LOW;
753 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
754 } else if (strcmp(string, "equal") == 0 ||
755 strcmp(string, "eq") == 0) {
756 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
757 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
763 d = strtol(p0, &p1, 10);
765 if (d < 0 || d > 65535)
767 element->mle_type = MAC_LOMAC_TYPE_GRADE;
768 element->mle_grade = d;
770 if (p1 == p0 || *p1 != '\0')
778 * Note: destructively consumes the string, make a local copy before
779 * calling if that's a problem.
782 mac_lomac_parse(struct mac_lomac *mac_lomac, char *string)
784 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
788 /* Do we have a range? */
790 range = index(string, '(');
793 auxsingle = index(string, '[');
794 if (auxsingle == single)
796 if (range != NULL && auxsingle != NULL)
798 rangelow = rangehigh = NULL;
800 /* Nul terminate the end of the single string. */
804 rangehigh = index(rangelow, '-');
805 if (rangehigh == NULL)
808 if (*rangelow == '\0' || *rangehigh == '\0')
810 rangeend = index(rangehigh, ')');
811 if (rangeend == NULL)
813 if (*(rangeend + 1) != '\0')
815 /* Nul terminate the ends of the ranges. */
816 *(rangehigh - 1) = '\0';
819 KASSERT((rangelow != NULL && rangehigh != NULL) ||
820 (rangelow == NULL && rangehigh == NULL),
821 ("mac_lomac_internalize_label: range mismatch"));
822 if (auxsingle != NULL) {
823 /* Nul terminate the end of the single string. */
826 auxsingleend = index(auxsingle, ']');
827 if (auxsingleend == NULL)
829 if (*(auxsingleend + 1) != '\0')
831 /* Nul terminate the end of the auxsingle. */
832 *auxsingleend = '\0';
835 bzero(mac_lomac, sizeof(*mac_lomac));
836 if (single != NULL) {
837 error = mac_lomac_parse_element(&mac_lomac->ml_single, single);
840 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
843 if (auxsingle != NULL) {
844 error = mac_lomac_parse_element(&mac_lomac->ml_auxsingle,
848 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_AUX;
851 if (rangelow != NULL) {
852 error = mac_lomac_parse_element(&mac_lomac->ml_rangelow,
856 error = mac_lomac_parse_element(&mac_lomac->ml_rangehigh,
860 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_RANGE;
863 error = mac_lomac_valid(mac_lomac);
871 mac_lomac_internalize_label(struct label *label, char *element_name,
872 char *element_data, int *claimed)
874 struct mac_lomac *mac_lomac, mac_lomac_temp;
877 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
882 error = mac_lomac_parse(&mac_lomac_temp, element_data);
886 mac_lomac = SLOT(label);
887 *mac_lomac = mac_lomac_temp;
893 mac_lomac_copy_label(struct label *src, struct label *dest)
896 *SLOT(dest) = *SLOT(src);
900 * Labeling event operations: file system objects, and things that look
901 * a lot like file system objects.
904 mac_lomac_create_devfs_device(struct ucred *cred, struct mount *mp,
905 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
907 struct mac_lomac *mac_lomac;
910 mac_lomac = SLOT(delabel);
911 if (strcmp(dev->si_name, "null") == 0 ||
912 strcmp(dev->si_name, "zero") == 0 ||
913 strcmp(dev->si_name, "random") == 0 ||
914 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 ||
915 strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0)
916 lomac_type = MAC_LOMAC_TYPE_EQUAL;
917 else if (ptys_equal &&
918 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
919 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
920 lomac_type = MAC_LOMAC_TYPE_EQUAL;
922 lomac_type = MAC_LOMAC_TYPE_HIGH;
923 mac_lomac_set_single(mac_lomac, lomac_type, 0);
927 mac_lomac_create_devfs_directory(struct mount *mp, char *dirname,
928 int dirnamelen, struct devfs_dirent *de, struct label *delabel)
930 struct mac_lomac *mac_lomac;
932 mac_lomac = SLOT(delabel);
933 mac_lomac_set_single(mac_lomac, MAC_LOMAC_TYPE_HIGH, 0);
937 mac_lomac_create_devfs_symlink(struct ucred *cred, struct mount *mp,
938 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
939 struct label *delabel)
941 struct mac_lomac *source, *dest;
943 source = SLOT(cred->cr_label);
944 dest = SLOT(delabel);
946 mac_lomac_copy_single(source, dest);
950 mac_lomac_create_mount(struct ucred *cred, struct mount *mp,
951 struct label *mplabel)
953 struct mac_lomac *source, *dest;
955 source = SLOT(cred->cr_label);
956 dest = SLOT(mplabel);
957 mac_lomac_copy_single(source, dest);
961 mac_lomac_relabel_vnode(struct ucred *cred, struct vnode *vp,
962 struct label *vplabel, struct label *newlabel)
964 struct mac_lomac *source, *dest;
966 source = SLOT(newlabel);
967 dest = SLOT(vplabel);
969 try_relabel(source, dest);
973 mac_lomac_update_devfs(struct mount *mp, struct devfs_dirent *de,
974 struct label *delabel, struct vnode *vp, struct label *vplabel)
976 struct mac_lomac *source, *dest;
978 source = SLOT(vplabel);
979 dest = SLOT(delabel);
981 mac_lomac_copy(source, dest);
985 mac_lomac_associate_vnode_devfs(struct mount *mp, struct label *mplabel,
986 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
987 struct label *vplabel)
989 struct mac_lomac *source, *dest;
991 source = SLOT(delabel);
992 dest = SLOT(vplabel);
994 mac_lomac_copy_single(source, dest);
998 mac_lomac_associate_vnode_extattr(struct mount *mp, struct label *mplabel,
999 struct vnode *vp, struct label *vplabel)
1001 struct mac_lomac temp, *source, *dest;
1004 source = SLOT(mplabel);
1005 dest = SLOT(vplabel);
1007 buflen = sizeof(temp);
1008 bzero(&temp, buflen);
1010 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1011 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&temp, curthread);
1012 if (error == ENOATTR || error == EOPNOTSUPP) {
1013 /* Fall back to the mntlabel. */
1014 mac_lomac_copy_single(source, dest);
1019 if (buflen != sizeof(temp)) {
1020 if (buflen != sizeof(temp) - sizeof(temp.ml_auxsingle)) {
1021 printf("mac_lomac_associate_vnode_extattr: bad size %d\n",
1025 bzero(&temp.ml_auxsingle, sizeof(temp.ml_auxsingle));
1026 buflen = sizeof(temp);
1027 (void)vn_extattr_set(vp, IO_NODELOCKED,
1028 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
1029 buflen, (char *)&temp, curthread);
1031 if (mac_lomac_valid(&temp) != 0) {
1032 printf("mac_lomac_associate_vnode_extattr: invalid\n");
1035 if ((temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) != MAC_LOMAC_FLAG_SINGLE) {
1036 printf("mac_lomac_associate_vnode_extattr: not single\n");
1040 mac_lomac_copy_single(&temp, dest);
1045 mac_lomac_associate_vnode_singlelabel(struct mount *mp,
1046 struct label *mplabel, struct vnode *vp, struct label *vplabel)
1048 struct mac_lomac *source, *dest;
1050 source = SLOT(mplabel);
1051 dest = SLOT(vplabel);
1053 mac_lomac_copy_single(source, dest);
1057 mac_lomac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
1058 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
1059 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
1061 struct mac_lomac *source, *dest, *dir, temp;
1065 buflen = sizeof(temp);
1066 bzero(&temp, buflen);
1068 source = SLOT(cred->cr_label);
1069 dest = SLOT(vplabel);
1070 dir = SLOT(dvplabel);
1071 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
1072 mac_lomac_copy_auxsingle(dir, &temp);
1073 mac_lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
1074 dir->ml_auxsingle.mle_grade);
1076 mac_lomac_copy_single(source, &temp);
1079 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1080 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
1082 mac_lomac_copy(&temp, dest);
1087 mac_lomac_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
1088 struct label *vplabel, struct label *intlabel)
1090 struct mac_lomac *source, temp;
1094 buflen = sizeof(temp);
1095 bzero(&temp, buflen);
1097 source = SLOT(intlabel);
1098 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1101 mac_lomac_copy_single(source, &temp);
1102 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1103 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
1108 * Labeling event operations: IPC object.
1111 mac_lomac_create_inpcb_from_socket(struct socket *so, struct label *solabel,
1112 struct inpcb *inp, struct label *inplabel)
1114 struct mac_lomac *source, *dest;
1116 source = SLOT(solabel);
1117 dest = SLOT(inplabel);
1119 mac_lomac_copy_single(source, dest);
1123 mac_lomac_create_mbuf_from_socket(struct socket *so, struct label *solabel,
1124 struct mbuf *m, struct label *mlabel)
1126 struct mac_lomac *source, *dest;
1128 source = SLOT(solabel);
1129 dest = SLOT(mlabel);
1131 mac_lomac_copy_single(source, dest);
1135 mac_lomac_create_socket(struct ucred *cred, struct socket *so,
1136 struct label *solabel)
1138 struct mac_lomac *source, *dest;
1140 source = SLOT(cred->cr_label);
1141 dest = SLOT(solabel);
1143 mac_lomac_copy_single(source, dest);
1147 mac_lomac_create_pipe(struct ucred *cred, struct pipepair *pp,
1148 struct label *pplabel)
1150 struct mac_lomac *source, *dest;
1152 source = SLOT(cred->cr_label);
1153 dest = SLOT(pplabel);
1155 mac_lomac_copy_single(source, dest);
1159 mac_lomac_create_socket_from_socket(struct socket *oldso,
1160 struct label *oldsolabel, struct socket *newso, struct label *newsolabel)
1162 struct mac_lomac *source, *dest;
1164 source = SLOT(oldsolabel);
1165 dest = SLOT(newsolabel);
1167 mac_lomac_copy_single(source, dest);
1171 mac_lomac_relabel_socket(struct ucred *cred, struct socket *so,
1172 struct label *solabel, struct label *newlabel)
1174 struct mac_lomac *source, *dest;
1176 source = SLOT(newlabel);
1177 dest = SLOT(solabel);
1179 try_relabel(source, dest);
1183 mac_lomac_relabel_pipe(struct ucred *cred, struct pipepair *pp,
1184 struct label *pplabel, struct label *newlabel)
1186 struct mac_lomac *source, *dest;
1188 source = SLOT(newlabel);
1189 dest = SLOT(pplabel);
1191 try_relabel(source, dest);
1195 mac_lomac_set_socket_peer_from_mbuf(struct mbuf *m, struct label *mlabel,
1196 struct socket *so, struct label *sopeerlabel)
1198 struct mac_lomac *source, *dest;
1200 source = SLOT(mlabel);
1201 dest = SLOT(sopeerlabel);
1203 mac_lomac_copy_single(source, dest);
1207 * Labeling event operations: network objects.
1210 mac_lomac_set_socket_peer_from_socket(struct socket *oldso,
1211 struct label *oldsolabel, struct socket *newso,
1212 struct label *newsopeerlabel)
1214 struct mac_lomac *source, *dest;
1216 source = SLOT(oldsolabel);
1217 dest = SLOT(newsopeerlabel);
1219 mac_lomac_copy_single(source, dest);
1223 mac_lomac_create_bpfdesc(struct ucred *cred, struct bpf_d *d,
1224 struct label *dlabel)
1226 struct mac_lomac *source, *dest;
1228 source = SLOT(cred->cr_label);
1229 dest = SLOT(dlabel);
1231 mac_lomac_copy_single(source, dest);
1235 mac_lomac_create_ifnet(struct ifnet *ifp, struct label *ifplabel)
1237 char tifname[IFNAMSIZ], *p, *q;
1238 char tiflist[sizeof(trusted_interfaces)];
1239 struct mac_lomac *dest;
1242 dest = SLOT(ifplabel);
1244 if (ifp->if_type == IFT_LOOP) {
1245 grade = MAC_LOMAC_TYPE_EQUAL;
1249 if (trust_all_interfaces) {
1250 grade = MAC_LOMAC_TYPE_HIGH;
1254 grade = MAC_LOMAC_TYPE_LOW;
1256 if (trusted_interfaces[0] == '\0' ||
1257 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1260 bzero(tiflist, sizeof(tiflist));
1261 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1262 if(*p != ' ' && *p != '\t')
1265 for (p = q = tiflist;; p++) {
1266 if (*p == ',' || *p == '\0') {
1268 if (len < IFNAMSIZ) {
1269 bzero(tifname, sizeof(tifname));
1270 bcopy(q, tifname, len);
1271 if (strcmp(tifname, ifp->if_xname) == 0) {
1272 grade = MAC_LOMAC_TYPE_HIGH;
1278 printf("MAC/LOMAC warning: interface name "
1279 "\"%s\" is too long (must be < %d)\n",
1288 mac_lomac_set_single(dest, grade, 0);
1289 mac_lomac_set_range(dest, grade, 0, grade, 0);
1293 mac_lomac_create_ipq(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
1294 struct label *ipqlabel)
1296 struct mac_lomac *source, *dest;
1298 source = SLOT(mlabel);
1299 dest = SLOT(ipqlabel);
1301 mac_lomac_copy_single(source, dest);
1305 mac_lomac_create_datagram_from_ipq(struct ipq *ipq, struct label *ipqlabel,
1306 struct mbuf *m, struct label *mlabel)
1308 struct mac_lomac *source, *dest;
1310 source = SLOT(ipqlabel);
1311 dest = SLOT(mlabel);
1313 /* Just use the head, since we require them all to match. */
1314 mac_lomac_copy_single(source, dest);
1318 mac_lomac_create_fragment(struct mbuf *m, struct label *mlabel,
1319 struct mbuf *frag, struct label *fraglabel)
1321 struct mac_lomac *source, *dest;
1323 source = SLOT(mlabel);
1324 dest = SLOT(fraglabel);
1326 mac_lomac_copy_single(source, dest);
1330 mac_lomac_create_mbuf_from_inpcb(struct inpcb *inp, struct label *inplabel,
1331 struct mbuf *m, struct label *mlabel)
1333 struct mac_lomac *source, *dest;
1335 source = SLOT(inplabel);
1336 dest = SLOT(mlabel);
1338 mac_lomac_copy_single(source, dest);
1342 mac_lomac_create_mbuf_linklayer(struct ifnet *ifp, struct label *ifplabel,
1343 struct mbuf *m, struct label *mlabel)
1345 struct mac_lomac *dest;
1347 dest = SLOT(mlabel);
1349 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1353 mac_lomac_create_mbuf_from_bpfdesc(struct bpf_d *d, struct label *dlabel,
1354 struct mbuf *m, struct label *mlabel)
1356 struct mac_lomac *source, *dest;
1358 source = SLOT(dlabel);
1359 dest = SLOT(mlabel);
1361 mac_lomac_copy_single(source, dest);
1365 mac_lomac_create_mbuf_from_ifnet(struct ifnet *ifp, struct label *ifplabel,
1366 struct mbuf *m, struct label *mlabel)
1368 struct mac_lomac *source, *dest;
1370 source = SLOT(ifplabel);
1371 dest = SLOT(mlabel);
1373 mac_lomac_copy_single(source, dest);
1377 mac_lomac_create_mbuf_multicast_encap(struct mbuf *m, struct label *mlabel,
1378 struct ifnet *ifp, struct label *ifplabel, struct mbuf *mnew,
1379 struct label *mnewlabel)
1381 struct mac_lomac *source, *dest;
1383 source = SLOT(mlabel);
1384 dest = SLOT(mnewlabel);
1386 mac_lomac_copy_single(source, dest);
1390 mac_lomac_create_mbuf_netlayer(struct mbuf *m, struct label *mlabel,
1391 struct mbuf *mnew, struct label *mnewlabel)
1393 struct mac_lomac *source, *dest;
1395 source = SLOT(mlabel);
1396 dest = SLOT(mnewlabel);
1398 mac_lomac_copy_single(source, dest);
1402 mac_lomac_fragment_match(struct mbuf *m, struct label *mlabel,
1403 struct ipq *ipq, struct label *ipqlabel)
1405 struct mac_lomac *a, *b;
1410 return (mac_lomac_equal_single(a, b));
1414 mac_lomac_relabel_ifnet(struct ucred *cred, struct ifnet *ifp,
1415 struct label *ifplabel, struct label *newlabel)
1417 struct mac_lomac *source, *dest;
1419 source = SLOT(newlabel);
1420 dest = SLOT(ifplabel);
1422 try_relabel(source, dest);
1426 mac_lomac_update_ipq(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
1427 struct label *ipqlabel)
1430 /* NOOP: we only accept matching labels, so no need to update */
1434 mac_lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1435 struct inpcb *inp, struct label *inplabel)
1437 struct mac_lomac *source, *dest;
1439 source = SLOT(solabel);
1440 dest = SLOT(inplabel);
1442 mac_lomac_copy_single(source, dest);
1446 mac_lomac_init_syncache_from_inpcb(struct label *label, struct inpcb *inp)
1448 struct mac_lomac *source, *dest;
1450 source = SLOT(inp->inp_label);
1452 mac_lomac_copy(source, dest);
1456 mac_lomac_create_mbuf_from_syncache(struct label *sc_label, struct mbuf *m,
1457 struct label *mlabel)
1459 struct mac_lomac *source, *dest;
1461 source = SLOT(sc_label);
1462 dest = SLOT(mlabel);
1463 mac_lomac_copy(source, dest);
1467 mac_lomac_create_mbuf_from_firewall(struct mbuf *m, struct label *mlabel)
1469 struct mac_lomac *dest;
1471 dest = SLOT(mlabel);
1473 /* XXX: where is the label for the firewall really comming from? */
1474 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1478 * Labeling event operations: processes.
1481 mac_lomac_execve_transition(struct ucred *old, struct ucred *new,
1482 struct vnode *vp, struct label *vplabel, struct label *interpvnodelabel,
1483 struct image_params *imgp, struct label *execlabel)
1485 struct mac_lomac *source, *dest, *obj, *robj;
1487 source = SLOT(old->cr_label);
1488 dest = SLOT(new->cr_label);
1489 obj = SLOT(vplabel);
1490 robj = interpvnodelabel != NULL ? SLOT(interpvnodelabel) : obj;
1492 mac_lomac_copy(source, dest);
1494 * If there's an auxiliary label on the real object, respect it
1495 * and assume that this level should be assumed immediately if
1496 * a higher level is currently in place.
1498 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
1499 !mac_lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
1500 && mac_lomac_auxsingle_in_range(robj, dest))
1501 mac_lomac_set_single(dest, robj->ml_auxsingle.mle_type,
1502 robj->ml_auxsingle.mle_grade);
1504 * Restructuring to use the execve transitioning mechanism
1505 * instead of the normal demotion mechanism here would be
1506 * difficult, so just copy the label over and perform standard
1507 * demotion. This is also non-optimal because it will result
1508 * in the intermediate label "new" being created and immediately
1511 if (mac_lomac_enabled && revocation_enabled &&
1512 !mac_lomac_dominate_single(obj, source))
1513 (void)maybe_demote(source, obj, "executing", "file", vp);
1517 mac_lomac_execve_will_transition(struct ucred *old, struct vnode *vp,
1518 struct label *vplabel, struct label *interpvnodelabel,
1519 struct image_params *imgp, struct label *execlabel)
1521 struct mac_lomac *subj, *obj, *robj;
1523 if (!mac_lomac_enabled || !revocation_enabled)
1526 subj = SLOT(old->cr_label);
1527 obj = SLOT(vplabel);
1528 robj = interpvnodelabel != NULL ? SLOT(interpvnodelabel) : obj;
1530 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
1531 !mac_lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
1532 && mac_lomac_auxsingle_in_range(robj, subj)) ||
1533 !mac_lomac_dominate_single(obj, subj));
1537 mac_lomac_create_proc0(struct ucred *cred)
1539 struct mac_lomac *dest;
1541 dest = SLOT(cred->cr_label);
1543 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1544 mac_lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH,
1549 mac_lomac_create_proc1(struct ucred *cred)
1551 struct mac_lomac *dest;
1553 dest = SLOT(cred->cr_label);
1555 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
1556 mac_lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH,
1561 mac_lomac_relabel_cred(struct ucred *cred, struct label *newlabel)
1563 struct mac_lomac *source, *dest;
1565 source = SLOT(newlabel);
1566 dest = SLOT(cred->cr_label);
1568 try_relabel(source, dest);
1572 * Access control checks.
1575 mac_lomac_check_bpfdesc_receive(struct bpf_d *d, struct label *dlabel,
1576 struct ifnet *ifp, struct label *ifplabel)
1578 struct mac_lomac *a, *b;
1580 if (!mac_lomac_enabled)
1586 if (mac_lomac_equal_single(a, b))
1592 mac_lomac_check_cred_relabel(struct ucred *cred, struct label *newlabel)
1594 struct mac_lomac *subj, *new;
1597 subj = SLOT(cred->cr_label);
1598 new = SLOT(newlabel);
1601 * If there is a LOMAC label update for the credential, it may
1602 * be an update of the single, range, or both.
1604 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1609 * If the LOMAC label is to be changed, authorize as appropriate.
1611 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1613 * Fill in the missing parts from the previous label.
1615 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1616 mac_lomac_copy_single(subj, new);
1617 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1618 mac_lomac_copy_range(subj, new);
1621 * To change the LOMAC range on a credential, the new
1622 * range label must be in the current range.
1624 if (!mac_lomac_range_in_range(new, subj))
1628 * To change the LOMAC single label on a credential, the
1629 * new single label must be in the new range. Implicitly
1630 * from the previous check, the new single is in the old
1633 if (!mac_lomac_single_in_range(new, new))
1637 * To have EQUAL in any component of the new credential
1638 * LOMAC label, the subject must already have EQUAL in
1641 if (mac_lomac_contains_equal(new)) {
1642 error = mac_lomac_subject_privileged(subj);
1648 * XXXMAC: Additional consistency tests regarding the
1649 * single and range of the new label might be performed
1658 mac_lomac_check_cred_visible(struct ucred *cr1, struct ucred *cr2)
1660 struct mac_lomac *subj, *obj;
1662 if (!mac_lomac_enabled)
1665 subj = SLOT(cr1->cr_label);
1666 obj = SLOT(cr2->cr_label);
1669 if (!mac_lomac_dominate_single(obj, subj))
1676 mac_lomac_check_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1677 struct label *ifplabel, struct label *newlabel)
1679 struct mac_lomac *subj, *new;
1682 subj = SLOT(cred->cr_label);
1683 new = SLOT(newlabel);
1686 * If there is a LOMAC label update for the interface, it may
1687 * be an update of the single, range, or both.
1689 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1694 * Relabling network interfaces requires LOMAC privilege.
1696 error = mac_lomac_subject_privileged(subj);
1701 * If the LOMAC label is to be changed, authorize as appropriate.
1703 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1705 * Fill in the missing parts from the previous label.
1707 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1708 mac_lomac_copy_single(subj, new);
1709 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1710 mac_lomac_copy_range(subj, new);
1713 * Rely on the traditional superuser status for the LOMAC
1714 * interface relabel requirements. XXXMAC: This will go
1717 * XXXRW: This is also redundant to a higher layer check.
1719 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
1724 * XXXMAC: Additional consistency tests regarding the single
1725 * and the range of the new label might be performed here.
1733 mac_lomac_check_ifnet_transmit(struct ifnet *ifp, struct label *ifplabel,
1734 struct mbuf *m, struct label *mlabel)
1736 struct mac_lomac *p, *i;
1738 if (!mac_lomac_enabled)
1744 return (mac_lomac_single_in_range(p, i) ? 0 : EACCES);
1748 mac_lomac_check_inpcb_deliver(struct inpcb *inp, struct label *inplabel,
1749 struct mbuf *m, struct label *mlabel)
1751 struct mac_lomac *p, *i;
1753 if (!mac_lomac_enabled)
1759 return (mac_lomac_equal_single(p, i) ? 0 : EACCES);
1763 mac_lomac_check_kld_load(struct ucred *cred, struct vnode *vp,
1764 struct label *vplabel)
1766 struct mac_lomac *subj, *obj;
1768 if (!mac_lomac_enabled)
1771 subj = SLOT(cred->cr_label);
1772 obj = SLOT(vplabel);
1774 if (mac_lomac_subject_privileged(subj))
1777 if (!mac_lomac_high_single(obj))
1784 mac_lomac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp,
1785 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1788 if (!mac_lomac_enabled)
1791 /* XXX: This will be implemented soon... */
1797 mac_lomac_check_pipe_read(struct ucred *cred, struct pipepair *pp,
1798 struct label *pplabel)
1800 struct mac_lomac *subj, *obj;
1802 if (!mac_lomac_enabled)
1805 subj = SLOT(cred->cr_label);
1806 obj = SLOT(pplabel);
1808 if (!mac_lomac_dominate_single(obj, subj))
1809 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1815 mac_lomac_check_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1816 struct label *pplabel, struct label *newlabel)
1818 struct mac_lomac *subj, *obj, *new;
1821 new = SLOT(newlabel);
1822 subj = SLOT(cred->cr_label);
1823 obj = SLOT(pplabel);
1826 * If there is a LOMAC label update for a pipe, it must be a
1829 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1834 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1835 * authorize the relabel.
1837 if (!mac_lomac_single_in_range(obj, subj))
1841 * If the LOMAC label is to be changed, authorize as appropriate.
1843 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1845 * To change the LOMAC label on a pipe, the new pipe label
1846 * must be in the subject range.
1848 if (!mac_lomac_single_in_range(new, subj))
1852 * To change the LOMAC label on a pipe to be EQUAL, the
1853 * subject must have appropriate privilege.
1855 if (mac_lomac_contains_equal(new)) {
1856 error = mac_lomac_subject_privileged(subj);
1866 mac_lomac_check_pipe_write(struct ucred *cred, struct pipepair *pp,
1867 struct label *pplabel)
1869 struct mac_lomac *subj, *obj;
1871 if (!mac_lomac_enabled)
1874 subj = SLOT(cred->cr_label);
1875 obj = SLOT(pplabel);
1877 if (!mac_lomac_subject_dominate(subj, obj))
1884 mac_lomac_check_proc_debug(struct ucred *cred, struct proc *p)
1886 struct mac_lomac *subj, *obj;
1888 if (!mac_lomac_enabled)
1891 subj = SLOT(cred->cr_label);
1892 obj = SLOT(p->p_ucred->cr_label);
1894 /* XXX: range checks */
1895 if (!mac_lomac_dominate_single(obj, subj))
1897 if (!mac_lomac_subject_dominate(subj, obj))
1904 mac_lomac_check_proc_sched(struct ucred *cred, struct proc *p)
1906 struct mac_lomac *subj, *obj;
1908 if (!mac_lomac_enabled)
1911 subj = SLOT(cred->cr_label);
1912 obj = SLOT(p->p_ucred->cr_label);
1914 /* XXX: range checks */
1915 if (!mac_lomac_dominate_single(obj, subj))
1917 if (!mac_lomac_subject_dominate(subj, obj))
1924 mac_lomac_check_proc_signal(struct ucred *cred, struct proc *p, int signum)
1926 struct mac_lomac *subj, *obj;
1928 if (!mac_lomac_enabled)
1931 subj = SLOT(cred->cr_label);
1932 obj = SLOT(p->p_ucred->cr_label);
1934 /* XXX: range checks */
1935 if (!mac_lomac_dominate_single(obj, subj))
1937 if (!mac_lomac_subject_dominate(subj, obj))
1944 mac_lomac_check_socket_deliver(struct socket *so, struct label *solabel,
1945 struct mbuf *m, struct label *mlabel)
1947 struct mac_lomac *p, *s;
1949 if (!mac_lomac_enabled)
1955 return (mac_lomac_equal_single(p, s) ? 0 : EACCES);
1959 mac_lomac_check_socket_relabel(struct ucred *cred, struct socket *so,
1960 struct label *solabel, struct label *newlabel)
1962 struct mac_lomac *subj, *obj, *new;
1965 new = SLOT(newlabel);
1966 subj = SLOT(cred->cr_label);
1967 obj = SLOT(solabel);
1970 * If there is a LOMAC label update for the socket, it may be
1971 * an update of single.
1973 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1978 * To relabel a socket, the old socket single must be in the subject
1981 if (!mac_lomac_single_in_range(obj, subj))
1985 * If the LOMAC label is to be changed, authorize as appropriate.
1987 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1989 * To relabel a socket, the new socket single must be in
1990 * the subject range.
1992 if (!mac_lomac_single_in_range(new, subj))
1996 * To change the LOMAC label on the socket to contain EQUAL,
1997 * the subject must have appropriate privilege.
1999 if (mac_lomac_contains_equal(new)) {
2000 error = mac_lomac_subject_privileged(subj);
2010 mac_lomac_check_socket_visible(struct ucred *cred, struct socket *so,
2011 struct label *solabel)
2013 struct mac_lomac *subj, *obj;
2015 if (!mac_lomac_enabled)
2018 subj = SLOT(cred->cr_label);
2019 obj = SLOT(solabel);
2021 if (!mac_lomac_dominate_single(obj, subj))
2028 * Some system privileges are allowed regardless of integrity grade; others
2029 * are allowed only when running with privilege with respect to the LOMAC
2030 * policy as they might otherwise allow bypassing of the integrity policy.
2033 mac_lomac_priv_check(struct ucred *cred, int priv)
2035 struct mac_lomac *subj;
2038 if (!mac_lomac_enabled)
2042 * Exempt only specific privileges from the LOMAC integrity policy.
2049 * Allow processes to manipulate basic process audit properties, and
2050 * to submit audit records.
2052 case PRIV_AUDIT_GETAUDIT:
2053 case PRIV_AUDIT_SETAUDIT:
2054 case PRIV_AUDIT_SUBMIT:
2057 * Allow processes to manipulate their regular UNIX credentials.
2059 case PRIV_CRED_SETUID:
2060 case PRIV_CRED_SETEUID:
2061 case PRIV_CRED_SETGID:
2062 case PRIV_CRED_SETEGID:
2063 case PRIV_CRED_SETGROUPS:
2064 case PRIV_CRED_SETREUID:
2065 case PRIV_CRED_SETREGID:
2066 case PRIV_CRED_SETRESUID:
2067 case PRIV_CRED_SETRESGID:
2070 * Allow processes to perform system monitoring.
2072 case PRIV_SEEOTHERGIDS:
2073 case PRIV_SEEOTHERUIDS:
2077 * Allow access to general process debugging facilities. We
2078 * separately control debugging based on MAC label.
2080 case PRIV_DEBUG_DIFFCRED:
2081 case PRIV_DEBUG_SUGID:
2082 case PRIV_DEBUG_UNPRIV:
2085 * Allow manipulating jails.
2087 case PRIV_JAIL_ATTACH:
2090 * Allow privilege with respect to the Partition policy, but not the
2093 case PRIV_MAC_PARTITION:
2096 * Allow privilege with respect to process resource limits and login
2099 case PRIV_PROC_LIMIT:
2100 case PRIV_PROC_SETLOGIN:
2101 case PRIV_PROC_SETRLIMIT:
2104 * Allow System V and POSIX IPC privileges.
2107 case PRIV_IPC_WRITE:
2108 case PRIV_IPC_ADMIN:
2109 case PRIV_IPC_MSGSIZE:
2113 * Allow certain scheduler manipulations -- possibly this should be
2114 * controlled by more fine-grained policy, as potentially low
2115 * integrity processes can deny CPU to higher integrity ones.
2117 case PRIV_SCHED_DIFFCRED:
2118 case PRIV_SCHED_SETPRIORITY:
2119 case PRIV_SCHED_RTPRIO:
2120 case PRIV_SCHED_SETPOLICY:
2121 case PRIV_SCHED_SET:
2122 case PRIV_SCHED_SETPARAM:
2125 * More IPC privileges.
2127 case PRIV_SEM_WRITE:
2130 * Allow signaling privileges subject to integrity policy.
2132 case PRIV_SIGNAL_DIFFCRED:
2133 case PRIV_SIGNAL_SUGID:
2136 * Allow access to only limited sysctls from lower integrity levels;
2137 * piggy-back on the Jail definition.
2139 case PRIV_SYSCTL_WRITEJAIL:
2142 * Allow TTY-based privileges, subject to general device access using
2143 * labels on TTY device nodes, but not console privilege.
2145 case PRIV_TTY_DRAINWAIT:
2146 case PRIV_TTY_DTRWAIT:
2147 case PRIV_TTY_EXCLUSIVE:
2148 case PRIV_TTY_PRISON:
2153 * Grant most VFS privileges, as almost all are in practice bounded
2154 * by more specific checks using labels.
2157 case PRIV_VFS_WRITE:
2158 case PRIV_VFS_ADMIN:
2160 case PRIV_VFS_LOOKUP:
2161 case PRIV_VFS_CHFLAGS_DEV:
2162 case PRIV_VFS_CHOWN:
2163 case PRIV_VFS_CHROOT:
2164 case PRIV_VFS_RETAINSUGID:
2165 case PRIV_VFS_EXCEEDQUOTA:
2166 case PRIV_VFS_FCHROOT:
2167 case PRIV_VFS_FHOPEN:
2168 case PRIV_VFS_FHSTATFS:
2169 case PRIV_VFS_GENERATION:
2170 case PRIV_VFS_GETFH:
2171 case PRIV_VFS_GETQUOTA:
2173 case PRIV_VFS_MOUNT:
2174 case PRIV_VFS_MOUNT_OWNER:
2175 case PRIV_VFS_MOUNT_PERM:
2176 case PRIV_VFS_MOUNT_SUIDDIR:
2177 case PRIV_VFS_MOUNT_NONUSER:
2178 case PRIV_VFS_SETGID:
2179 case PRIV_VFS_STICKYFILE:
2180 case PRIV_VFS_SYSFLAGS:
2181 case PRIV_VFS_UNMOUNT:
2184 * Allow VM privileges; it would be nice if these were subject to
2187 case PRIV_VM_MADV_PROTECT:
2189 case PRIV_VM_MUNLOCK:
2192 * Allow some but not all network privileges. In general, dont allow
2193 * reconfiguring the network stack, just normal use.
2195 case PRIV_NETATALK_RESERVEDPORT:
2196 case PRIV_NETINET_RESERVEDPORT:
2197 case PRIV_NETINET_RAW:
2198 case PRIV_NETINET_REUSEPORT:
2199 case PRIV_NETIPX_RESERVEDPORT:
2200 case PRIV_NETIPX_RAW:
2204 * All remaining system privileges are allow only if the process
2205 * holds privilege with respect to the LOMAC policy.
2208 subj = SLOT(cred->cr_label);
2209 error = mac_lomac_subject_privileged(subj);
2218 mac_lomac_check_system_acct(struct ucred *cred, struct vnode *vp,
2219 struct label *vplabel)
2221 struct mac_lomac *subj, *obj;
2223 if (!mac_lomac_enabled)
2226 subj = SLOT(cred->cr_label);
2227 obj = SLOT(vplabel);
2229 if (mac_lomac_subject_privileged(subj))
2232 if (!mac_lomac_high_single(obj))
2239 mac_lomac_check_system_auditctl(struct ucred *cred, struct vnode *vp,
2240 struct label *vplabel)
2242 struct mac_lomac *subj, *obj;
2244 if (!mac_lomac_enabled)
2247 subj = SLOT(cred->cr_label);
2248 obj = SLOT(vplabel);
2250 if (mac_lomac_subject_privileged(subj))
2253 if (!mac_lomac_high_single(obj))
2260 mac_lomac_check_system_swapoff(struct ucred *cred, struct vnode *vp,
2261 struct label *vplabel)
2263 struct mac_lomac *subj;
2265 if (!mac_lomac_enabled)
2268 subj = SLOT(cred->cr_label);
2270 if (mac_lomac_subject_privileged(subj))
2277 mac_lomac_check_system_swapon(struct ucred *cred, struct vnode *vp,
2278 struct label *vplabel)
2280 struct mac_lomac *subj, *obj;
2282 if (!mac_lomac_enabled)
2285 subj = SLOT(cred->cr_label);
2286 obj = SLOT(vplabel);
2288 if (mac_lomac_subject_privileged(subj))
2291 if (!mac_lomac_high_single(obj))
2298 mac_lomac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2299 void *arg1, int arg2, struct sysctl_req *req)
2301 struct mac_lomac *subj;
2303 if (!mac_lomac_enabled)
2306 subj = SLOT(cred->cr_label);
2309 * Treat sysctl variables without CTLFLAG_ANYBODY flag as
2310 * lomac/high, but also require privilege to change them.
2312 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2314 if (!mac_lomac_subject_dominate_high(subj))
2318 if (mac_lomac_subject_privileged(subj))
2326 mac_lomac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
2327 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2329 struct mac_lomac *subj, *obj;
2331 if (!mac_lomac_enabled)
2334 subj = SLOT(cred->cr_label);
2335 obj = SLOT(dvplabel);
2337 if (!mac_lomac_subject_dominate(subj, obj))
2339 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2340 !mac_lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2347 mac_lomac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
2348 struct label *vplabel, acl_type_t type)
2350 struct mac_lomac *subj, *obj;
2352 if (!mac_lomac_enabled)
2355 subj = SLOT(cred->cr_label);
2356 obj = SLOT(vplabel);
2358 if (!mac_lomac_subject_dominate(subj, obj))
2365 mac_lomac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
2366 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2367 struct componentname *cnp)
2369 struct mac_lomac *subj, *obj;
2371 if (!mac_lomac_enabled)
2374 subj = SLOT(cred->cr_label);
2375 obj = SLOT(dvplabel);
2377 if (!mac_lomac_subject_dominate(subj, obj))
2380 obj = SLOT(vplabel);
2382 if (!mac_lomac_subject_dominate(subj, obj))
2389 mac_lomac_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
2390 struct label *vplabel, int prot, int flags)
2392 struct mac_lomac *subj, *obj;
2395 * Rely on the use of open()-time protections to handle
2396 * non-revocation cases.
2398 if (!mac_lomac_enabled)
2401 subj = SLOT(cred->cr_label);
2402 obj = SLOT(vplabel);
2404 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2405 if (!mac_lomac_subject_dominate(subj, obj))
2408 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2409 if (!mac_lomac_dominate_single(obj, subj))
2410 return (maybe_demote(subj, obj, "mapping", "file", vp));
2417 mac_lomac_check_vnode_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2418 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2420 struct mac_lomac *subj, *obj;
2423 * Rely on the use of open()-time protections to handle
2424 * non-revocation cases.
2426 if (!mac_lomac_enabled || !revocation_enabled)
2429 subj = SLOT(cred->cr_label);
2430 obj = SLOT(vplabel);
2432 if (!mac_lomac_subject_dominate(subj, obj))
2433 *prot &= ~VM_PROT_WRITE;
2437 mac_lomac_check_vnode_open(struct ucred *cred, struct vnode *vp,
2438 struct label *vplabel, int acc_mode)
2440 struct mac_lomac *subj, *obj;
2442 if (!mac_lomac_enabled)
2445 subj = SLOT(cred->cr_label);
2446 obj = SLOT(vplabel);
2448 /* XXX privilege override for admin? */
2449 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) {
2450 if (!mac_lomac_subject_dominate(subj, obj))
2458 mac_lomac_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred,
2459 struct vnode *vp, struct label *vplabel)
2461 struct mac_lomac *subj, *obj;
2463 if (!mac_lomac_enabled || !revocation_enabled)
2466 subj = SLOT(active_cred->cr_label);
2467 obj = SLOT(vplabel);
2469 if (!mac_lomac_dominate_single(obj, subj))
2470 return (maybe_demote(subj, obj, "reading", "file", vp));
2476 mac_lomac_check_vnode_relabel(struct ucred *cred, struct vnode *vp,
2477 struct label *vplabel, struct label *newlabel)
2479 struct mac_lomac *old, *new, *subj;
2482 old = SLOT(vplabel);
2483 new = SLOT(newlabel);
2484 subj = SLOT(cred->cr_label);
2487 * If there is a LOMAC label update for the vnode, it must be a
2488 * single label, with an optional explicit auxiliary single.
2490 error = lomac_atmostflags(new,
2491 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2496 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2497 * authorize the relabel.
2499 if (!mac_lomac_single_in_range(old, subj))
2503 * If the LOMAC label is to be changed, authorize as appropriate.
2505 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2507 * To change the LOMAC label on a vnode, the new vnode label
2508 * must be in the subject range.
2510 if (!mac_lomac_single_in_range(new, subj))
2514 * To change the LOMAC label on the vnode to be EQUAL,
2515 * the subject must have appropriate privilege.
2517 if (mac_lomac_contains_equal(new)) {
2518 error = mac_lomac_subject_privileged(subj);
2523 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2525 * Fill in the missing parts from the previous label.
2527 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2528 mac_lomac_copy_single(subj, new);
2531 * To change the auxiliary LOMAC label on a vnode, the new
2532 * vnode label must be in the subject range.
2534 if (!mac_lomac_auxsingle_in_range(new, subj))
2538 * To change the auxiliary LOMAC label on the vnode to be
2539 * EQUAL, the subject must have appropriate privilege.
2541 if (mac_lomac_contains_equal(new)) {
2542 error = mac_lomac_subject_privileged(subj);
2552 mac_lomac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
2553 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2554 struct componentname *cnp)
2556 struct mac_lomac *subj, *obj;
2558 if (!mac_lomac_enabled)
2561 subj = SLOT(cred->cr_label);
2562 obj = SLOT(dvplabel);
2564 if (!mac_lomac_subject_dominate(subj, obj))
2567 obj = SLOT(vplabel);
2569 if (!mac_lomac_subject_dominate(subj, obj))
2576 mac_lomac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
2577 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2578 int samedir, struct componentname *cnp)
2580 struct mac_lomac *subj, *obj;
2582 if (!mac_lomac_enabled)
2585 subj = SLOT(cred->cr_label);
2586 obj = SLOT(dvplabel);
2588 if (!mac_lomac_subject_dominate(subj, obj))
2592 obj = SLOT(vplabel);
2594 if (!mac_lomac_subject_dominate(subj, obj))
2602 mac_lomac_check_vnode_revoke(struct ucred *cred, struct vnode *vp,
2603 struct label *vplabel)
2605 struct mac_lomac *subj, *obj;
2607 if (!mac_lomac_enabled)
2610 subj = SLOT(cred->cr_label);
2611 obj = SLOT(vplabel);
2613 if (!mac_lomac_subject_dominate(subj, obj))
2620 mac_lomac_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
2621 struct label *vplabel, acl_type_t type, struct acl *acl)
2623 struct mac_lomac *subj, *obj;
2625 if (!mac_lomac_enabled)
2628 subj = SLOT(cred->cr_label);
2629 obj = SLOT(vplabel);
2631 if (!mac_lomac_subject_dominate(subj, obj))
2638 mac_lomac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
2639 struct label *vplabel, int attrnamespace, const char *name,
2642 struct mac_lomac *subj, *obj;
2644 if (!mac_lomac_enabled)
2647 subj = SLOT(cred->cr_label);
2648 obj = SLOT(vplabel);
2650 if (!mac_lomac_subject_dominate(subj, obj))
2653 /* XXX: protect the MAC EA in a special way? */
2659 mac_lomac_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
2660 struct label *vplabel, u_long flags)
2662 struct mac_lomac *subj, *obj;
2664 if (!mac_lomac_enabled)
2667 subj = SLOT(cred->cr_label);
2668 obj = SLOT(vplabel);
2670 if (!mac_lomac_subject_dominate(subj, obj))
2677 mac_lomac_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
2678 struct label *vplabel, mode_t mode)
2680 struct mac_lomac *subj, *obj;
2682 if (!mac_lomac_enabled)
2685 subj = SLOT(cred->cr_label);
2686 obj = SLOT(vplabel);
2688 if (!mac_lomac_subject_dominate(subj, obj))
2695 mac_lomac_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
2696 struct label *vplabel, uid_t uid, gid_t gid)
2698 struct mac_lomac *subj, *obj;
2700 if (!mac_lomac_enabled)
2703 subj = SLOT(cred->cr_label);
2704 obj = SLOT(vplabel);
2706 if (!mac_lomac_subject_dominate(subj, obj))
2713 mac_lomac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
2714 struct label *vplabel, struct timespec atime, struct timespec mtime)
2716 struct mac_lomac *subj, *obj;
2718 if (!mac_lomac_enabled)
2721 subj = SLOT(cred->cr_label);
2722 obj = SLOT(vplabel);
2724 if (!mac_lomac_subject_dominate(subj, obj))
2731 mac_lomac_check_vnode_unlink(struct ucred *cred, struct vnode *dvp,
2732 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2733 struct componentname *cnp)
2735 struct mac_lomac *subj, *obj;
2737 if (!mac_lomac_enabled)
2740 subj = SLOT(cred->cr_label);
2741 obj = SLOT(dvplabel);
2743 if (!mac_lomac_subject_dominate(subj, obj))
2746 obj = SLOT(vplabel);
2748 if (!mac_lomac_subject_dominate(subj, obj))
2755 mac_lomac_check_vnode_write(struct ucred *active_cred,
2756 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2758 struct mac_lomac *subj, *obj;
2760 if (!mac_lomac_enabled || !revocation_enabled)
2763 subj = SLOT(active_cred->cr_label);
2764 obj = SLOT(vplabel);
2766 if (!mac_lomac_subject_dominate(subj, obj))
2773 mac_lomac_thread_userret(struct thread *td)
2775 struct proc *p = td->td_proc;
2776 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2777 struct ucred *newcred, *oldcred;
2780 mtx_lock(&subj->mtx);
2781 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2783 mtx_unlock(&subj->mtx);
2786 * Prevent a lock order reversal in
2787 * mac_cred_mmapped_drop_perms; ideally, the other
2788 * user of subj->mtx wouldn't be holding Giant.
2792 mtx_lock(&subj->mtx);
2794 * Check if we lost the race while allocating the cred.
2796 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2800 oldcred = p->p_ucred;
2801 crcopy(newcred, oldcred);
2803 mac_lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2804 p->p_ucred = newcred;
2808 mtx_unlock(&subj->mtx);
2811 mac_cred_mmapped_drop_perms(curthread, newcred);
2814 mtx_unlock(&subj->mtx);
2818 static struct mac_policy_ops mac_lomac_ops =
2820 .mpo_init = mac_lomac_init,
2821 .mpo_init_bpfdesc_label = mac_lomac_init_label,
2822 .mpo_init_cred_label = mac_lomac_init_label,
2823 .mpo_init_devfs_label = mac_lomac_init_label,
2824 .mpo_init_ifnet_label = mac_lomac_init_label,
2825 .mpo_init_syncache_label = mac_lomac_init_label_waitcheck,
2826 .mpo_init_inpcb_label = mac_lomac_init_label_waitcheck,
2827 .mpo_init_ipq_label = mac_lomac_init_label_waitcheck,
2828 .mpo_init_mbuf_label = mac_lomac_init_label_waitcheck,
2829 .mpo_init_mount_label = mac_lomac_init_label,
2830 .mpo_init_pipe_label = mac_lomac_init_label,
2831 .mpo_init_proc_label = mac_lomac_init_proc_label,
2832 .mpo_init_socket_label = mac_lomac_init_label_waitcheck,
2833 .mpo_init_socket_peer_label = mac_lomac_init_label_waitcheck,
2834 .mpo_init_vnode_label = mac_lomac_init_label,
2835 .mpo_init_syncache_from_inpcb = mac_lomac_init_syncache_from_inpcb,
2836 .mpo_destroy_bpfdesc_label = mac_lomac_destroy_label,
2837 .mpo_destroy_cred_label = mac_lomac_destroy_label,
2838 .mpo_destroy_devfs_label = mac_lomac_destroy_label,
2839 .mpo_destroy_ifnet_label = mac_lomac_destroy_label,
2840 .mpo_destroy_inpcb_label = mac_lomac_destroy_label,
2841 .mpo_destroy_ipq_label = mac_lomac_destroy_label,
2842 .mpo_destroy_mbuf_label = mac_lomac_destroy_label,
2843 .mpo_destroy_mount_label = mac_lomac_destroy_label,
2844 .mpo_destroy_pipe_label = mac_lomac_destroy_label,
2845 .mpo_destroy_proc_label = mac_lomac_destroy_proc_label,
2846 .mpo_destroy_syncache_label = mac_lomac_destroy_label,
2847 .mpo_destroy_socket_label = mac_lomac_destroy_label,
2848 .mpo_destroy_socket_peer_label = mac_lomac_destroy_label,
2849 .mpo_destroy_vnode_label = mac_lomac_destroy_label,
2850 .mpo_copy_cred_label = mac_lomac_copy_label,
2851 .mpo_copy_ifnet_label = mac_lomac_copy_label,
2852 .mpo_copy_mbuf_label = mac_lomac_copy_label,
2853 .mpo_copy_pipe_label = mac_lomac_copy_label,
2854 .mpo_copy_socket_label = mac_lomac_copy_label,
2855 .mpo_copy_vnode_label = mac_lomac_copy_label,
2856 .mpo_externalize_cred_label = mac_lomac_externalize_label,
2857 .mpo_externalize_ifnet_label = mac_lomac_externalize_label,
2858 .mpo_externalize_pipe_label = mac_lomac_externalize_label,
2859 .mpo_externalize_socket_label = mac_lomac_externalize_label,
2860 .mpo_externalize_socket_peer_label = mac_lomac_externalize_label,
2861 .mpo_externalize_vnode_label = mac_lomac_externalize_label,
2862 .mpo_internalize_cred_label = mac_lomac_internalize_label,
2863 .mpo_internalize_ifnet_label = mac_lomac_internalize_label,
2864 .mpo_internalize_pipe_label = mac_lomac_internalize_label,
2865 .mpo_internalize_socket_label = mac_lomac_internalize_label,
2866 .mpo_internalize_vnode_label = mac_lomac_internalize_label,
2867 .mpo_create_devfs_device = mac_lomac_create_devfs_device,
2868 .mpo_create_devfs_directory = mac_lomac_create_devfs_directory,
2869 .mpo_create_devfs_symlink = mac_lomac_create_devfs_symlink,
2870 .mpo_create_mount = mac_lomac_create_mount,
2871 .mpo_relabel_vnode = mac_lomac_relabel_vnode,
2872 .mpo_update_devfs = mac_lomac_update_devfs,
2873 .mpo_associate_vnode_devfs = mac_lomac_associate_vnode_devfs,
2874 .mpo_associate_vnode_extattr = mac_lomac_associate_vnode_extattr,
2875 .mpo_associate_vnode_singlelabel =
2876 mac_lomac_associate_vnode_singlelabel,
2877 .mpo_create_vnode_extattr = mac_lomac_create_vnode_extattr,
2878 .mpo_setlabel_vnode_extattr = mac_lomac_setlabel_vnode_extattr,
2879 .mpo_create_mbuf_from_socket = mac_lomac_create_mbuf_from_socket,
2880 .mpo_create_mbuf_from_syncache = mac_lomac_create_mbuf_from_syncache,
2881 .mpo_create_pipe = mac_lomac_create_pipe,
2882 .mpo_create_socket = mac_lomac_create_socket,
2883 .mpo_create_socket_from_socket = mac_lomac_create_socket_from_socket,
2884 .mpo_relabel_pipe = mac_lomac_relabel_pipe,
2885 .mpo_relabel_socket = mac_lomac_relabel_socket,
2886 .mpo_set_socket_peer_from_mbuf = mac_lomac_set_socket_peer_from_mbuf,
2887 .mpo_set_socket_peer_from_socket =
2888 mac_lomac_set_socket_peer_from_socket,
2889 .mpo_create_bpfdesc = mac_lomac_create_bpfdesc,
2890 .mpo_create_datagram_from_ipq = mac_lomac_create_datagram_from_ipq,
2891 .mpo_create_fragment = mac_lomac_create_fragment,
2892 .mpo_create_ifnet = mac_lomac_create_ifnet,
2893 .mpo_create_inpcb_from_socket = mac_lomac_create_inpcb_from_socket,
2894 .mpo_create_ipq = mac_lomac_create_ipq,
2895 .mpo_create_mbuf_from_inpcb = mac_lomac_create_mbuf_from_inpcb,
2896 .mpo_create_mbuf_linklayer = mac_lomac_create_mbuf_linklayer,
2897 .mpo_create_mbuf_from_bpfdesc = mac_lomac_create_mbuf_from_bpfdesc,
2898 .mpo_create_mbuf_from_ifnet = mac_lomac_create_mbuf_from_ifnet,
2899 .mpo_create_mbuf_multicast_encap =
2900 mac_lomac_create_mbuf_multicast_encap,
2901 .mpo_create_mbuf_netlayer = mac_lomac_create_mbuf_netlayer,
2902 .mpo_fragment_match = mac_lomac_fragment_match,
2903 .mpo_relabel_ifnet = mac_lomac_relabel_ifnet,
2904 .mpo_update_ipq = mac_lomac_update_ipq,
2905 .mpo_inpcb_sosetlabel = mac_lomac_inpcb_sosetlabel,
2906 .mpo_execve_transition = mac_lomac_execve_transition,
2907 .mpo_execve_will_transition = mac_lomac_execve_will_transition,
2908 .mpo_create_proc0 = mac_lomac_create_proc0,
2909 .mpo_create_proc1 = mac_lomac_create_proc1,
2910 .mpo_relabel_cred = mac_lomac_relabel_cred,
2911 .mpo_check_bpfdesc_receive = mac_lomac_check_bpfdesc_receive,
2912 .mpo_check_cred_relabel = mac_lomac_check_cred_relabel,
2913 .mpo_check_cred_visible = mac_lomac_check_cred_visible,
2914 .mpo_check_ifnet_relabel = mac_lomac_check_ifnet_relabel,
2915 .mpo_check_ifnet_transmit = mac_lomac_check_ifnet_transmit,
2916 .mpo_check_inpcb_deliver = mac_lomac_check_inpcb_deliver,
2917 .mpo_check_kld_load = mac_lomac_check_kld_load,
2918 .mpo_check_pipe_ioctl = mac_lomac_check_pipe_ioctl,
2919 .mpo_check_pipe_read = mac_lomac_check_pipe_read,
2920 .mpo_check_pipe_relabel = mac_lomac_check_pipe_relabel,
2921 .mpo_check_pipe_write = mac_lomac_check_pipe_write,
2922 .mpo_check_proc_debug = mac_lomac_check_proc_debug,
2923 .mpo_check_proc_sched = mac_lomac_check_proc_sched,
2924 .mpo_check_proc_signal = mac_lomac_check_proc_signal,
2925 .mpo_check_socket_deliver = mac_lomac_check_socket_deliver,
2926 .mpo_check_socket_relabel = mac_lomac_check_socket_relabel,
2927 .mpo_check_socket_visible = mac_lomac_check_socket_visible,
2928 .mpo_check_system_acct = mac_lomac_check_system_acct,
2929 .mpo_check_system_auditctl = mac_lomac_check_system_auditctl,
2930 .mpo_check_system_swapoff = mac_lomac_check_system_swapoff,
2931 .mpo_check_system_swapon = mac_lomac_check_system_swapon,
2932 .mpo_check_system_sysctl = mac_lomac_check_system_sysctl,
2933 .mpo_check_vnode_access = mac_lomac_check_vnode_open,
2934 .mpo_check_vnode_create = mac_lomac_check_vnode_create,
2935 .mpo_check_vnode_deleteacl = mac_lomac_check_vnode_deleteacl,
2936 .mpo_check_vnode_link = mac_lomac_check_vnode_link,
2937 .mpo_check_vnode_mmap = mac_lomac_check_vnode_mmap,
2938 .mpo_check_vnode_mmap_downgrade = mac_lomac_check_vnode_mmap_downgrade,
2939 .mpo_check_vnode_open = mac_lomac_check_vnode_open,
2940 .mpo_check_vnode_read = mac_lomac_check_vnode_read,
2941 .mpo_check_vnode_relabel = mac_lomac_check_vnode_relabel,
2942 .mpo_check_vnode_rename_from = mac_lomac_check_vnode_rename_from,
2943 .mpo_check_vnode_rename_to = mac_lomac_check_vnode_rename_to,
2944 .mpo_check_vnode_revoke = mac_lomac_check_vnode_revoke,
2945 .mpo_check_vnode_setacl = mac_lomac_check_vnode_setacl,
2946 .mpo_check_vnode_setextattr = mac_lomac_check_vnode_setextattr,
2947 .mpo_check_vnode_setflags = mac_lomac_check_vnode_setflags,
2948 .mpo_check_vnode_setmode = mac_lomac_check_vnode_setmode,
2949 .mpo_check_vnode_setowner = mac_lomac_check_vnode_setowner,
2950 .mpo_check_vnode_setutimes = mac_lomac_check_vnode_setutimes,
2951 .mpo_check_vnode_unlink = mac_lomac_check_vnode_unlink,
2952 .mpo_check_vnode_write = mac_lomac_check_vnode_write,
2953 .mpo_thread_userret = mac_lomac_thread_userret,
2954 .mpo_create_mbuf_from_firewall = mac_lomac_create_mbuf_from_firewall,
2955 .mpo_priv_check = mac_lomac_priv_check,
2958 MAC_POLICY_SET(&mac_lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
2959 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS,