1 /*-
2 * Copyright (c) 1999-2002, 2007-2011 Robert N. M. Watson
3 * Copyright (c) 2001-2005 McAfee, Inc.
4 * Copyright (c) 2006 SPARTA, Inc.
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * This software was developed for the FreeBSD Project in part by McAfee
10 * Research, the Security Research Division of McAfee, Inc. under
11 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
12 * CHATS research program.
13 *
14 * This software was enhanced by SPARTA ISSO under SPAWAR contract
15 * N66001-04-C-6019 ("SEFOS").
16 *
17 * This software was developed at the University of Cambridge Computer
18 * Laboratory with support from a grant from Google, Inc.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 * $FreeBSD: releng/10.0/sys/security/mac_biba/mac_biba.c 254603 2013-08-21 17:45:00Z kib $
42 */
43
44 /*
45 * Developed by the TrustedBSD Project.
46 *
47 * Biba fixed label mandatory integrity policy.
48 */
49
50 #include <sys/param.h>
51 #include <sys/conf.h>
52 #include <sys/extattr.h>
53 #include <sys/kernel.h>
54 #include <sys/ksem.h>
55 #include <sys/malloc.h>
56 #include <sys/mman.h>
57 #include <sys/mount.h>
58 #include <sys/priv.h>
59 #include <sys/proc.h>
60 #include <sys/sbuf.h>
61 #include <sys/systm.h>
62 #include <sys/sysproto.h>
63 #include <sys/sysent.h>
64 #include <sys/systm.h>
65 #include <sys/vnode.h>
66 #include <sys/file.h>
67 #include <sys/socket.h>
68 #include <sys/socketvar.h>
69 #include <sys/pipe.h>
70 #include <sys/sx.h>
71 #include <sys/sysctl.h>
72 #include <sys/msg.h>
73 #include <sys/sem.h>
74 #include <sys/shm.h>
75
76 #include <fs/devfs/devfs.h>
77
78 #include <net/bpfdesc.h>
79 #include <net/if.h>
80 #include <net/if_types.h>
81 #include <net/if_var.h>
82
83 #include <netinet/in.h>
84 #include <netinet/in_pcb.h>
85 #include <netinet/ip_var.h>
86
87 #include <vm/uma.h>
88 #include <vm/vm.h>
89
90 #include <security/mac/mac_policy.h>
91 #include <security/mac_biba/mac_biba.h>
92
93 SYSCTL_DECL(_security_mac);
94
95 static SYSCTL_NODE(_security_mac, OID_AUTO, biba, CTLFLAG_RW, 0,
96 "TrustedBSD mac_biba policy controls");
97
98 static int biba_label_size = sizeof(struct mac_biba);
99 SYSCTL_INT(_security_mac_biba, OID_AUTO, label_size, CTLFLAG_RD,
100 &biba_label_size, 0, "Size of struct mac_biba");
101
102 static int biba_enabled = 1;
103 SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RW, &biba_enabled,
104 0, "Enforce MAC/Biba policy");
105 TUNABLE_INT("security.mac.biba.enabled", &biba_enabled);
106
107 static int destroyed_not_inited;
108 SYSCTL_INT(_security_mac_biba, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
109 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
110
111 static int trust_all_interfaces = 0;
112 SYSCTL_INT(_security_mac_biba, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
113 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/Biba");
114 TUNABLE_INT("security.mac.biba.trust_all_interfaces", &trust_all_interfaces);
115
116 static char trusted_interfaces[128];
117 SYSCTL_STRING(_security_mac_biba, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
118 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/Biba");
119 TUNABLE_STR("security.mac.biba.trusted_interfaces", trusted_interfaces,
120 sizeof(trusted_interfaces));
121
122 static int max_compartments = MAC_BIBA_MAX_COMPARTMENTS;
123 SYSCTL_INT(_security_mac_biba, OID_AUTO, max_compartments, CTLFLAG_RD,
124 &max_compartments, 0, "Maximum supported compartments");
125
126 static int ptys_equal = 0;
127 SYSCTL_INT(_security_mac_biba, OID_AUTO, ptys_equal, CTLFLAG_RW, &ptys_equal,
128 0, "Label pty devices as biba/equal on create");
129 TUNABLE_INT("security.mac.biba.ptys_equal", &ptys_equal);
130
131 static int interfaces_equal = 1;
132 SYSCTL_INT(_security_mac_biba, OID_AUTO, interfaces_equal, CTLFLAG_RW,
133 &interfaces_equal, 0, "Label network interfaces as biba/equal on create");
134 TUNABLE_INT("security.mac.biba.interfaces_equal", &interfaces_equal);
135
136 static int revocation_enabled = 0;
137 SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RW,
138 &revocation_enabled, 0, "Revoke access to objects on relabel");
139 TUNABLE_INT("security.mac.biba.revocation_enabled", &revocation_enabled);
140
141 static int biba_slot;
142 #define SLOT(l) ((struct mac_biba *)mac_label_get((l), biba_slot))
143 #define SLOT_SET(l, val) mac_label_set((l), biba_slot, (uintptr_t)(val))
144
145 static uma_zone_t zone_biba;
146
147 static __inline int
148 biba_bit_set_empty(u_char *set) {
149 int i;
150
151 for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
152 if (set[i] != 0)
153 return (0);
154 return (1);
155 }
156
157 static struct mac_biba *
158 biba_alloc(int flag)
159 {
160
161 return (uma_zalloc(zone_biba, flag | M_ZERO));
162 }
163
164 static void
165 biba_free(struct mac_biba *mb)
166 {
167
168 if (mb != NULL)
169 uma_zfree(zone_biba, mb);
170 else
171 atomic_add_int(&destroyed_not_inited, 1);
172 }
173
174 static int
175 biba_atmostflags(struct mac_biba *mb, int flags)
176 {
177
178 if ((mb->mb_flags & flags) != mb->mb_flags)
179 return (EINVAL);
180 return (0);
181 }
182
183 static int
184 biba_dominate_element(struct mac_biba_element *a, struct mac_biba_element *b)
185 {
186 int bit;
187
188 switch (a->mbe_type) {
189 case MAC_BIBA_TYPE_EQUAL:
190 case MAC_BIBA_TYPE_HIGH:
191 return (1);
192
193 case MAC_BIBA_TYPE_LOW:
194 switch (b->mbe_type) {
195 case MAC_BIBA_TYPE_GRADE:
196 case MAC_BIBA_TYPE_HIGH:
197 return (0);
198
199 case MAC_BIBA_TYPE_EQUAL:
200 case MAC_BIBA_TYPE_LOW:
201 return (1);
202
203 default:
204 panic("biba_dominate_element: b->mbe_type invalid");
205 }
206
207 case MAC_BIBA_TYPE_GRADE:
208 switch (b->mbe_type) {
209 case MAC_BIBA_TYPE_EQUAL:
210 case MAC_BIBA_TYPE_LOW:
211 return (1);
212
213 case MAC_BIBA_TYPE_HIGH:
214 return (0);
215
216 case MAC_BIBA_TYPE_GRADE:
217 for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++)
218 if (!MAC_BIBA_BIT_TEST(bit,
219 a->mbe_compartments) &&
220 MAC_BIBA_BIT_TEST(bit, b->mbe_compartments))
221 return (0);
222 return (a->mbe_grade >= b->mbe_grade);
223
224 default:
225 panic("biba_dominate_element: b->mbe_type invalid");
226 }
227
228 default:
229 panic("biba_dominate_element: a->mbe_type invalid");
230 }
231
232 return (0);
233 }
234
235 static int
236 biba_subject_dominate_high(struct mac_biba *mb)
237 {
238 struct mac_biba_element *element;
239
240 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
241 ("biba_effective_in_range: mb not effective"));
242 element = &mb->mb_effective;
243
244 return (element->mbe_type == MAC_BIBA_TYPE_EQUAL ||
245 element->mbe_type == MAC_BIBA_TYPE_HIGH);
246 }
247
248 static int
249 biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
250 {
251
252 return (biba_dominate_element(&rangeb->mb_rangehigh,
253 &rangea->mb_rangehigh) &&
254 biba_dominate_element(&rangea->mb_rangelow,
255 &rangeb->mb_rangelow));
256 }
257
258 static int
259 biba_effective_in_range(struct mac_biba *effective, struct mac_biba *range)
260 {
261
262 KASSERT((effective->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
263 ("biba_effective_in_range: a not effective"));
264 KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
265 ("biba_effective_in_range: b not range"));
266
267 return (biba_dominate_element(&range->mb_rangehigh,
268 &effective->mb_effective) &&
269 biba_dominate_element(&effective->mb_effective,
270 &range->mb_rangelow));
271
272 return (1);
273 }
274
275 static int
276 biba_dominate_effective(struct mac_biba *a, struct mac_biba *b)
277 {
278 KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
279 ("biba_dominate_effective: a not effective"));
280 KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
281 ("biba_dominate_effective: b not effective"));
282
283 return (biba_dominate_element(&a->mb_effective, &b->mb_effective));
284 }
285
286 static int
287 biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
288 {
289
290 if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
291 b->mbe_type == MAC_BIBA_TYPE_EQUAL)
292 return (1);
293
294 return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
295 }
296
297 static int
298 biba_equal_effective(struct mac_biba *a, struct mac_biba *b)
299 {
300
301 KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
302 ("biba_equal_effective: a not effective"));
303 KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
304 ("biba_equal_effective: b not effective"));
305
306 return (biba_equal_element(&a->mb_effective, &b->mb_effective));
307 }
308
309 static int
310 biba_contains_equal(struct mac_biba *mb)
311 {
312
313 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
314 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
315 return (1);
316 }
317
318 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
319 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
320 return (1);
321 if (mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
322 return (1);
323 }
324
325 return (0);
326 }
327
328 static int
329 biba_subject_privileged(struct mac_biba *mb)
330 {
331
332 KASSERT((mb->mb_flags & MAC_BIBA_FLAGS_BOTH) == MAC_BIBA_FLAGS_BOTH,
333 ("biba_subject_privileged: subject doesn't have both labels"));
334
335 /* If the effective is EQUAL, it's ok. */
336 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
337 return (0);
338
339 /* If either range endpoint is EQUAL, it's ok. */
340 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL ||
341 mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
342 return (0);
343
344 /* If the range is low-high, it's ok. */
345 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_LOW &&
346 mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_HIGH)
347 return (0);
348
349 /* It's not ok. */
350 return (EPERM);
351 }
352
353 static int
354 biba_high_effective(struct mac_biba *mb)
355 {
356
357 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
358 ("biba_equal_effective: mb not effective"));
359
360 return (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_HIGH);
361 }
362
363 static int
364 biba_valid(struct mac_biba *mb)
365 {
366
367 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
368 switch (mb->mb_effective.mbe_type) {
369 case MAC_BIBA_TYPE_GRADE:
370 break;
371
372 case MAC_BIBA_TYPE_EQUAL:
373 case MAC_BIBA_TYPE_HIGH:
374 case MAC_BIBA_TYPE_LOW:
375 if (mb->mb_effective.mbe_grade != 0 ||
376 !MAC_BIBA_BIT_SET_EMPTY(
377 mb->mb_effective.mbe_compartments))
378 return (EINVAL);
379 break;
380
381 default:
382 return (EINVAL);
383 }
384 } else {
385 if (mb->mb_effective.mbe_type != MAC_BIBA_TYPE_UNDEF)
386 return (EINVAL);
387 }
388
389 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
390 switch (mb->mb_rangelow.mbe_type) {
391 case MAC_BIBA_TYPE_GRADE:
392 break;
393
394 case MAC_BIBA_TYPE_EQUAL:
395 case MAC_BIBA_TYPE_HIGH:
396 case MAC_BIBA_TYPE_LOW:
397 if (mb->mb_rangelow.mbe_grade != 0 ||
398 !MAC_BIBA_BIT_SET_EMPTY(
399 mb->mb_rangelow.mbe_compartments))
400 return (EINVAL);
401 break;
402
403 default:
404 return (EINVAL);
405 }
406
407 switch (mb->mb_rangehigh.mbe_type) {
408 case MAC_BIBA_TYPE_GRADE:
409 break;
410
411 case MAC_BIBA_TYPE_EQUAL:
412 case MAC_BIBA_TYPE_HIGH:
413 case MAC_BIBA_TYPE_LOW:
414 if (mb->mb_rangehigh.mbe_grade != 0 ||
415 !MAC_BIBA_BIT_SET_EMPTY(
416 mb->mb_rangehigh.mbe_compartments))
417 return (EINVAL);
418 break;
419
420 default:
421 return (EINVAL);
422 }
423 if (!biba_dominate_element(&mb->mb_rangehigh,
424 &mb->mb_rangelow))
425 return (EINVAL);
426 } else {
427 if (mb->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
428 mb->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
429 return (EINVAL);
430 }
431
432 return (0);
433 }
434
435 static void
436 biba_set_range(struct mac_biba *mb, u_short typelow, u_short gradelow,
437 u_char *compartmentslow, u_short typehigh, u_short gradehigh,
438 u_char *compartmentshigh)
439 {
440
441 mb->mb_rangelow.mbe_type = typelow;
442 mb->mb_rangelow.mbe_grade = gradelow;
443 if (compartmentslow != NULL)
444 memcpy(mb->mb_rangelow.mbe_compartments, compartmentslow,
445 sizeof(mb->mb_rangelow.mbe_compartments));
446 mb->mb_rangehigh.mbe_type = typehigh;
447 mb->mb_rangehigh.mbe_grade = gradehigh;
448 if (compartmentshigh != NULL)
449 memcpy(mb->mb_rangehigh.mbe_compartments, compartmentshigh,
450 sizeof(mb->mb_rangehigh.mbe_compartments));
451 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
452 }
453
454 static void
455 biba_set_effective(struct mac_biba *mb, u_short type, u_short grade,
456 u_char *compartments)
457 {
458
459 mb->mb_effective.mbe_type = type;
460 mb->mb_effective.mbe_grade = grade;
461 if (compartments != NULL)
462 memcpy(mb->mb_effective.mbe_compartments, compartments,
463 sizeof(mb->mb_effective.mbe_compartments));
464 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
465 }
466
467 static void
468 biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
469 {
470
471 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
472 ("biba_copy_range: labelfrom not range"));
473
474 labelto->mb_rangelow = labelfrom->mb_rangelow;
475 labelto->mb_rangehigh = labelfrom->mb_rangehigh;
476 labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
477 }
478
479 static void
480 biba_copy_effective(struct mac_biba *labelfrom, struct mac_biba *labelto)
481 {
482
483 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
484 ("biba_copy_effective: labelfrom not effective"));
485
486 labelto->mb_effective = labelfrom->mb_effective;
487 labelto->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
488 }
489
490 static void
491 biba_copy(struct mac_biba *source, struct mac_biba *dest)
492 {
493
494 if (source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE)
495 biba_copy_effective(source, dest);
496 if (source->mb_flags & MAC_BIBA_FLAG_RANGE)
497 biba_copy_range(source, dest);
498 }
499
500 /*
501 * Policy module operations.
502 */
503 static void
504 biba_init(struct mac_policy_conf *conf)
505 {
506
507 zone_biba = uma_zcreate("mac_biba", sizeof(struct mac_biba), NULL,
508 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
509 }
510
511 /*
512 * Label operations.
513 */
514 static void
515 biba_init_label(struct label *label)
516 {
517
518 SLOT_SET(label, biba_alloc(M_WAITOK));
519 }
520
521 static int
522 biba_init_label_waitcheck(struct label *label, int flag)
523 {
524
525 SLOT_SET(label, biba_alloc(flag));
526 if (SLOT(label) == NULL)
527 return (ENOMEM);
528
529 return (0);
530 }
531
532 static void
533 biba_destroy_label(struct label *label)
534 {
535
536 biba_free(SLOT(label));
537 SLOT_SET(label, NULL);
538 }
539
540 /*
541 * biba_element_to_string() accepts an sbuf and Biba element. It converts
542 * the Biba element to a string and stores the result in the sbuf; if there
543 * isn't space in the sbuf, -1 is returned.
544 */
545 static int
546 biba_element_to_string(struct sbuf *sb, struct mac_biba_element *element)
547 {
548 int i, first;
549
550 switch (element->mbe_type) {
551 case MAC_BIBA_TYPE_HIGH:
552 return (sbuf_printf(sb, "high"));
553
554 case MAC_BIBA_TYPE_LOW:
555 return (sbuf_printf(sb, "low"));
556
557 case MAC_BIBA_TYPE_EQUAL:
558 return (sbuf_printf(sb, "equal"));
559
560 case MAC_BIBA_TYPE_GRADE:
561 if (sbuf_printf(sb, "%d", element->mbe_grade) == -1)
562 return (-1);
563
564 first = 1;
565 for (i = 1; i <= MAC_BIBA_MAX_COMPARTMENTS; i++) {
566 if (MAC_BIBA_BIT_TEST(i, element->mbe_compartments)) {
567 if (first) {
568 if (sbuf_putc(sb, ':') == -1)
569 return (-1);
570 if (sbuf_printf(sb, "%d", i) == -1)
571 return (-1);
572 first = 0;
573 } else {
574 if (sbuf_printf(sb, "+%d", i) == -1)
575 return (-1);
576 }
577 }
578 }
579 return (0);
580
581 default:
582 panic("biba_element_to_string: invalid type (%d)",
583 element->mbe_type);
584 }
585 }
586
587 /*
588 * biba_to_string() converts a Biba label to a string, and places the results
589 * in the passed sbuf. It returns 0 on success, or EINVAL if there isn't
590 * room in the sbuf. Note: the sbuf will be modified even in a failure case,
591 * so the caller may need to revert the sbuf by restoring the offset if
592 * that's undesired.
593 */
594 static int
595 biba_to_string(struct sbuf *sb, struct mac_biba *mb)
596 {
597
598 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
599 if (biba_element_to_string(sb, &mb->mb_effective) == -1)
600 return (EINVAL);
601 }
602
603 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
604 if (sbuf_putc(sb, '(') == -1)
605 return (EINVAL);
606
607 if (biba_element_to_string(sb, &mb->mb_rangelow) == -1)
608 return (EINVAL);
609
610 if (sbuf_putc(sb, '-') == -1)
611 return (EINVAL);
612
613 if (biba_element_to_string(sb, &mb->mb_rangehigh) == -1)
614 return (EINVAL);
615
616 if (sbuf_putc(sb, ')') == -1)
617 return (EINVAL);
618 }
619
620 return (0);
621 }
622
623 static int
624 biba_externalize_label(struct label *label, char *element_name,
625 struct sbuf *sb, int *claimed)
626 {
627 struct mac_biba *mb;
628
629 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
630 return (0);
631
632 (*claimed)++;
633
634 mb = SLOT(label);
635 return (biba_to_string(sb, mb));
636 }
637
638 static int
639 biba_parse_element(struct mac_biba_element *element, char *string)
640 {
641 char *compartment, *end, *grade;
642 int value;
643
644 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
645 element->mbe_type = MAC_BIBA_TYPE_HIGH;
646 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
647 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
648 element->mbe_type = MAC_BIBA_TYPE_LOW;
649 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
650 } else if (strcmp(string, "equal") == 0 ||
651 strcmp(string, "eq") == 0) {
652 element->mbe_type = MAC_BIBA_TYPE_EQUAL;
653 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
654 } else {
655 element->mbe_type = MAC_BIBA_TYPE_GRADE;
656
657 /*
658 * Numeric grade piece of the element.
659 */
660 grade = strsep(&string, ":");
661 value = strtol(grade, &end, 10);
662 if (end == grade || *end != '\0')
663 return (EINVAL);
664 if (value < 0 || value > 65535)
665 return (EINVAL);
666 element->mbe_grade = value;
667
668 /*
669 * Optional compartment piece of the element. If none are
670 * included, we assume that the label has no compartments.
671 */
672 if (string == NULL)
673 return (0);
674 if (*string == '\0')
675 return (0);
676
677 while ((compartment = strsep(&string, "+")) != NULL) {
678 value = strtol(compartment, &end, 10);
679 if (compartment == end || *end != '\0')
680 return (EINVAL);
681 if (value < 1 || value > MAC_BIBA_MAX_COMPARTMENTS)
682 return (EINVAL);
683 MAC_BIBA_BIT_SET(value, element->mbe_compartments);
684 }
685 }
686
687 return (0);
688 }
689
690 /*
691 * Note: destructively consumes the string, make a local copy before calling
692 * if that's a problem.
693 */
694 static int
695 biba_parse(struct mac_biba *mb, char *string)
696 {
697 char *rangehigh, *rangelow, *effective;
698 int error;
699
700 effective = strsep(&string, "(");
701 if (*effective == '\0')
702 effective = NULL;
703
704 if (string != NULL) {
705 rangelow = strsep(&string, "-");
706 if (string == NULL)
707 return (EINVAL);
708 rangehigh = strsep(&string, ")");
709 if (string == NULL)
710 return (EINVAL);
711 if (*string != '\0')
712 return (EINVAL);
713 } else {
714 rangelow = NULL;
715 rangehigh = NULL;
716 }
717
718 KASSERT((rangelow != NULL && rangehigh != NULL) ||
719 (rangelow == NULL && rangehigh == NULL),
720 ("biba_parse: range mismatch"));
721
722 bzero(mb, sizeof(*mb));
723 if (effective != NULL) {
724 error = biba_parse_element(&mb->mb_effective, effective);
725 if (error)
726 return (error);
727 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
728 }
729
730 if (rangelow != NULL) {
731 error = biba_parse_element(&mb->mb_rangelow, rangelow);
732 if (error)
733 return (error);
734 error = biba_parse_element(&mb->mb_rangehigh, rangehigh);
735 if (error)
736 return (error);
737 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
738 }
739
740 error = biba_valid(mb);
741 if (error)
742 return (error);
743
744 return (0);
745 }
746
747 static int
748 biba_internalize_label(struct label *label, char *element_name,
749 char *element_data, int *claimed)
750 {
751 struct mac_biba *mb, mb_temp;
752 int error;
753
754 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
755 return (0);
756
757 (*claimed)++;
758
759 error = biba_parse(&mb_temp, element_data);
760 if (error)
761 return (error);
762
763 mb = SLOT(label);
764 *mb = mb_temp;
765
766 return (0);
767 }
768
769 static void
770 biba_copy_label(struct label *src, struct label *dest)
771 {
772
773 *SLOT(dest) = *SLOT(src);
774 }
775
776 /*
777 * Object-specific entry point implementations are sorted alphabetically by
778 * object type name and then by operation.
779 */
780 static int
781 biba_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
782 struct ifnet *ifp, struct label *ifplabel)
783 {
784 struct mac_biba *a, *b;
785
786 if (!biba_enabled)
787 return (0);
788
789 a = SLOT(dlabel);
790 b = SLOT(ifplabel);
791
792 if (biba_equal_effective(a, b))
793 return (0);
794 return (EACCES);
795 }
796
797 static void
798 biba_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
799 struct label *dlabel)
800 {
801 struct mac_biba *source, *dest;
802
803 source = SLOT(cred->cr_label);
804 dest = SLOT(dlabel);
805
806 biba_copy_effective(source, dest);
807 }
808
809 static void
810 biba_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
811 struct mbuf *m, struct label *mlabel)
812 {
813 struct mac_biba *source, *dest;
814
815 source = SLOT(dlabel);
816 dest = SLOT(mlabel);
817
818 biba_copy_effective(source, dest);
819 }
820
821 static void
822 biba_cred_associate_nfsd(struct ucred *cred)
823 {
824 struct mac_biba *label;
825
826 label = SLOT(cred->cr_label);
827 biba_set_effective(label, MAC_BIBA_TYPE_LOW, 0, NULL);
828 biba_set_range(label, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
829 0, NULL);
830 }
831
832 static int
833 biba_cred_check_relabel(struct ucred *cred, struct label *newlabel)
834 {
835 struct mac_biba *subj, *new;
836 int error;
837
838 subj = SLOT(cred->cr_label);
839 new = SLOT(newlabel);
840
841 /*
842 * If there is a Biba label update for the credential, it may
843 * be an update of the effective, range, or both.
844 */
845 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
846 if (error)
847 return (error);
848
849 /*
850 * If the Biba label is to be changed, authorize as appropriate.
851 */
852 if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
853 /*
854 * If the change request modifies both the Biba label
855 * effective and range, check that the new effective will be
856 * in the new range.
857 */
858 if ((new->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
859 MAC_BIBA_FLAGS_BOTH &&
860 !biba_effective_in_range(new, new))
861 return (EINVAL);
862
863 /*
864 * To change the Biba effective label on a credential, the
865 * new effective label must be in the current range.
866 */
867 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE &&
868 !biba_effective_in_range(new, subj))
869 return (EPERM);
870
871 /*
872 * To change the Biba range on a credential, the new range
873 * label must be in the current range.
874 */
875 if (new->mb_flags & MAC_BIBA_FLAG_RANGE &&
876 !biba_range_in_range(new, subj))
877 return (EPERM);
878
879 /*
880 * To have EQUAL in any component of the new credential Biba
881 * label, the subject must already have EQUAL in their label.
882 */
883 if (biba_contains_equal(new)) {
884 error = biba_subject_privileged(subj);
885 if (error)
886 return (error);
887 }
888 }
889
890 return (0);
891 }
892
893 static int
894 biba_cred_check_visible(struct ucred *u1, struct ucred *u2)
895 {
896 struct mac_biba *subj, *obj;
897
898 if (!biba_enabled)
899 return (0);
900
901 subj = SLOT(u1->cr_label);
902 obj = SLOT(u2->cr_label);
903
904 /* XXX: range */
905 if (!biba_dominate_effective(obj, subj))
906 return (ESRCH);
907
908 return (0);
909 }
910
911 static void
912 biba_cred_create_init(struct ucred *cred)
913 {
914 struct mac_biba *dest;
915
916 dest = SLOT(cred->cr_label);
917
918 biba_set_effective(dest, MAC_BIBA_TYPE_HIGH, 0, NULL);
919 biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
920 0, NULL);
921 }
922
923 static void
924 biba_cred_create_swapper(struct ucred *cred)
925 {
926 struct mac_biba *dest;
927
928 dest = SLOT(cred->cr_label);
929
930 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
931 biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
932 0, NULL);
933 }
934
935 static void
936 biba_cred_relabel(struct ucred *cred, struct label *newlabel)
937 {
938 struct mac_biba *source, *dest;
939
940 source = SLOT(newlabel);
941 dest = SLOT(cred->cr_label);
942
943 biba_copy(source, dest);
944 }
945
946 static void
947 biba_devfs_create_device(struct ucred *cred, struct mount *mp,
948 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
949 {
950 struct mac_biba *mb;
951 const char *dn;
952 int biba_type;
953
954 mb = SLOT(delabel);
955 dn = devtoname(dev);
956 if (strcmp(dn, "null") == 0 ||
957 strcmp(dn, "zero") == 0 ||
958 strcmp(dn, "random") == 0 ||
959 strncmp(dn, "fd/", strlen("fd/")) == 0)
960 biba_type = MAC_BIBA_TYPE_EQUAL;
961 else if (ptys_equal &&
962 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
963 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
964 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
965 biba_type = MAC_BIBA_TYPE_EQUAL;
966 else
967 biba_type = MAC_BIBA_TYPE_HIGH;
968 biba_set_effective(mb, biba_type, 0, NULL);
969 }
970
971 static void
972 biba_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
973 struct devfs_dirent *de, struct label *delabel)
974 {
975 struct mac_biba *mb;
976
977 mb = SLOT(delabel);
978
979 biba_set_effective(mb, MAC_BIBA_TYPE_HIGH, 0, NULL);
980 }
981
982 static void
983 biba_devfs_create_symlink(struct ucred *cred, struct mount *mp,
984 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
985 struct label *delabel)
986 {
987 struct mac_biba *source, *dest;
988
989 source = SLOT(cred->cr_label);
990 dest = SLOT(delabel);
991
992 biba_copy_effective(source, dest);
993 }
994
995 static void
996 biba_devfs_update(struct mount *mp, struct devfs_dirent *de,
997 struct label *delabel, struct vnode *vp, struct label *vplabel)
998 {
999 struct mac_biba *source, *dest;
1000
1001 source = SLOT(vplabel);
1002 dest = SLOT(delabel);
1003
1004 biba_copy(source, dest);
1005 }
1006
1007 static void
1008 biba_devfs_vnode_associate(struct mount *mp, struct label *mntlabel,
1009 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1010 struct label *vplabel)
1011 {
1012 struct mac_biba *source, *dest;
1013
1014 source = SLOT(delabel);
1015 dest = SLOT(vplabel);
1016
1017 biba_copy_effective(source, dest);
1018 }
1019
1020 static int
1021 biba_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1022 struct label *ifplabel, struct label *newlabel)
1023 {
1024 struct mac_biba *subj, *new;
1025 int error;
1026
1027 subj = SLOT(cred->cr_label);
1028 new = SLOT(newlabel);
1029
1030 /*
1031 * If there is a Biba label update for the interface, it may be an
1032 * update of the effective, range, or both.
1033 */
1034 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
1035 if (error)
1036 return (error);
1037
1038 /*
1039 * Relabling network interfaces requires Biba privilege.
1040 */
1041 error = biba_subject_privileged(subj);
1042 if (error)
1043 return (error);
1044
1045 return (0);
1046 }
1047
1048 static int
1049 biba_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1050 struct mbuf *m, struct label *mlabel)
1051 {
1052 struct mac_biba *p, *i;
1053
1054 if (!biba_enabled)
1055 return (0);
1056
1057 p = SLOT(mlabel);
1058 i = SLOT(ifplabel);
1059
1060 return (biba_effective_in_range(p, i) ? 0 : EACCES);
1061 }
1062
1063 static void
1064 biba_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1065 {
1066 char tifname[IFNAMSIZ], *p, *q;
1067 char tiflist[sizeof(trusted_interfaces)];
1068 struct mac_biba *dest;
1069 int len, type;
1070
1071 dest = SLOT(ifplabel);
1072
1073 if (ifp->if_type == IFT_LOOP || interfaces_equal != 0) {
1074 type = MAC_BIBA_TYPE_EQUAL;
1075 goto set;
1076 }
1077
1078 if (trust_all_interfaces) {
1079 type = MAC_BIBA_TYPE_HIGH;
1080 goto set;
1081 }
1082
1083 type = MAC_BIBA_TYPE_LOW;
1084
1085 if (trusted_interfaces[0] == '\0' ||
1086 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1087 goto set;
1088
1089 bzero(tiflist, sizeof(tiflist));
1090 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1091 if(*p != ' ' && *p != '\t')
1092 *q = *p;
1093
1094 for (p = q = tiflist;; p++) {
1095 if (*p == ',' || *p == '\0') {
1096 len = p - q;
1097 if (len < IFNAMSIZ) {
1098 bzero(tifname, sizeof(tifname));
1099 bcopy(q, tifname, len);
1100 if (strcmp(tifname, ifp->if_xname) == 0) {
1101 type = MAC_BIBA_TYPE_HIGH;
1102 break;
1103 }
1104 } else {
1105 *p = '\0';
1106 printf("mac_biba warning: interface name "
1107 "\"%s\" is too long (must be < %d)\n",
1108 q, IFNAMSIZ);
1109 }
1110 if (*p == '\0')
1111 break;
1112 q = p + 1;
1113 }
1114 }
1115 set:
1116 biba_set_effective(dest, type, 0, NULL);
1117 biba_set_range(dest, type, 0, NULL, type, 0, NULL);
1118 }
1119
1120 static void
1121 biba_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1122 struct mbuf *m, struct label *mlabel)
1123 {
1124 struct mac_biba *source, *dest;
1125
1126 source = SLOT(ifplabel);
1127 dest = SLOT(mlabel);
1128
1129 biba_copy_effective(source, dest);
1130 }
1131
1132 static void
1133 biba_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1134 struct label *ifplabel, struct label *newlabel)
1135 {
1136 struct mac_biba *source, *dest;
1137
1138 source = SLOT(newlabel);
1139 dest = SLOT(ifplabel);
1140
1141 biba_copy(source, dest);
1142 }
1143
1144 static int
1145 biba_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1146 struct mbuf *m, struct label *mlabel)
1147 {
1148 struct mac_biba *p, *i;
1149
1150 if (!biba_enabled)
1151 return (0);
1152
1153 p = SLOT(mlabel);
1154 i = SLOT(inplabel);
1155
1156 return (biba_equal_effective(p, i) ? 0 : EACCES);
1157 }
1158
1159 static int
1160 biba_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1161 struct label *inplabel)
1162 {
1163 struct mac_biba *subj, *obj;
1164
1165 if (!biba_enabled)
1166 return (0);
1167
1168 subj = SLOT(cred->cr_label);
1169 obj = SLOT(inplabel);
1170
1171 if (!biba_dominate_effective(obj, subj))
1172 return (ENOENT);
1173
1174 return (0);
1175 }
1176
1177 static void
1178 biba_inpcb_create(struct socket *so, struct label *solabel,
1179 struct inpcb *inp, struct label *inplabel)
1180 {
1181 struct mac_biba *source, *dest;
1182
1183 source = SLOT(solabel);
1184 dest = SLOT(inplabel);
1185
1186 SOCK_LOCK(so);
1187 biba_copy_effective(source, dest);
1188 SOCK_UNLOCK(so);
1189 }
1190
1191 static void
1192 biba_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1193 struct mbuf *m, struct label *mlabel)
1194 {
1195 struct mac_biba *source, *dest;
1196
1197 source = SLOT(inplabel);
1198 dest = SLOT(mlabel);
1199
1200 biba_copy_effective(source, dest);
1201 }
1202
1203 static void
1204 biba_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1205 struct inpcb *inp, struct label *inplabel)
1206 {
1207 struct mac_biba *source, *dest;
1208
1209 SOCK_LOCK_ASSERT(so);
1210
1211 source = SLOT(solabel);
1212 dest = SLOT(inplabel);
1213
1214 biba_copy(source, dest);
1215 }
1216
1217 static void
1218 biba_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1219 struct label *q6label)
1220 {
1221 struct mac_biba *source, *dest;
1222
1223 source = SLOT(mlabel);
1224 dest = SLOT(q6label);
1225
1226 biba_copy_effective(source, dest);
1227 }
1228
1229 static int
1230 biba_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1231 struct label *q6label)
1232 {
1233 struct mac_biba *a, *b;
1234
1235 a = SLOT(q6label);
1236 b = SLOT(mlabel);
1237
1238 return (biba_equal_effective(a, b));
1239 }
1240
1241 static void
1242 biba_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1243 struct label *mlabel)
1244 {
1245 struct mac_biba *source, *dest;
1246
1247 source = SLOT(q6label);
1248 dest = SLOT(mlabel);
1249
1250 /* Just use the head, since we require them all to match. */
1251 biba_copy_effective(source, dest);
1252 }
1253
1254 static void
1255 biba_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1256 struct label *q6label)
1257 {
1258
1259 /* NOOP: we only accept matching labels, so no need to update */
1260 }
1261
1262 static void
1263 biba_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1264 struct label *qlabel)
1265 {
1266 struct mac_biba *source, *dest;
1267
1268 source = SLOT(mlabel);
1269 dest = SLOT(qlabel);
1270
1271 biba_copy_effective(source, dest);
1272 }
1273
1274 static int
1275 biba_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1276 struct label *qlabel)
1277 {
1278 struct mac_biba *a, *b;
1279
1280 a = SLOT(qlabel);
1281 b = SLOT(mlabel);
1282
1283 return (biba_equal_effective(a, b));
1284 }
1285
1286 static void
1287 biba_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1288 struct label *mlabel)
1289 {
1290 struct mac_biba *source, *dest;
1291
1292 source = SLOT(qlabel);
1293 dest = SLOT(mlabel);
1294
1295 /* Just use the head, since we require them all to match. */
1296 biba_copy_effective(source, dest);
1297 }
1298
1299 static void
1300 biba_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1301 struct label *qlabel)
1302 {
1303
1304 /* NOOP: we only accept matching labels, so no need to update */
1305 }
1306
1307 static int
1308 biba_kld_check_load(struct ucred *cred, struct vnode *vp,
1309 struct label *vplabel)
1310 {
1311 struct mac_biba *subj, *obj;
1312 int error;
1313
1314 if (!biba_enabled)
1315 return (0);
1316
1317 subj = SLOT(cred->cr_label);
1318
1319 error = biba_subject_privileged(subj);
1320 if (error)
1321 return (error);
1322
1323 obj = SLOT(vplabel);
1324 if (!biba_high_effective(obj))
1325 return (EACCES);
1326
1327 return (0);
1328 }
1329
1330 static int
1331 biba_mount_check_stat(struct ucred *cred, struct mount *mp,
1332 struct label *mplabel)
1333 {
1334 struct mac_biba *subj, *obj;
1335
1336 if (!biba_enabled)
1337 return (0);
1338
1339 subj = SLOT(cred->cr_label);
1340 obj = SLOT(mplabel);
1341
1342 if (!biba_dominate_effective(obj, subj))
1343 return (EACCES);
1344
1345 return (0);
1346 }
1347
1348 static void
1349 biba_mount_create(struct ucred *cred, struct mount *mp,
1350 struct label *mplabel)
1351 {
1352 struct mac_biba *source, *dest;
1353
1354 source = SLOT(cred->cr_label);
1355 dest = SLOT(mplabel);
1356
1357 biba_copy_effective(source, dest);
1358 }
1359
1360 static void
1361 biba_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel,
1362 struct mbuf *m, struct label *mlabel)
1363 {
1364 struct mac_biba *dest;
1365
1366 dest = SLOT(mlabel);
1367
1368 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1369 }
1370
1371 static void
1372 biba_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1373 struct mbuf *m, struct label *mlabel)
1374 {
1375 struct mac_biba *dest;
1376
1377 dest = SLOT(mlabel);
1378
1379 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1380 }
1381
1382 static void
1383 biba_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1384 struct mbuf *msend, struct label *msendlabel)
1385 {
1386 struct mac_biba *source, *dest;
1387
1388 source = SLOT(mrecvlabel);
1389 dest = SLOT(msendlabel);
1390
1391 biba_copy_effective(source, dest);
1392 }
1393
1394 static void
1395 biba_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1396 {
1397 struct mac_biba *dest;
1398
1399 dest = SLOT(mlabel);
1400
1401 /* XXX: where is the label for the firewall really coming from? */
1402 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1403 }
1404
1405 static void
1406 biba_netinet_fragment(struct mbuf *m, struct label *mlabel,
1407 struct mbuf *frag, struct label *fraglabel)
1408 {
1409 struct mac_biba *source, *dest;
1410
1411 source = SLOT(mlabel);
1412 dest = SLOT(fraglabel);
1413
1414 biba_copy_effective(source, dest);
1415 }
1416
1417 static void
1418 biba_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1419 struct mbuf *msend, struct label *msendlabel)
1420 {
1421 struct mac_biba *source, *dest;
1422
1423 source = SLOT(mrecvlabel);
1424 dest = SLOT(msendlabel);
1425
1426 biba_copy_effective(source, dest);
1427 }
1428
1429 static void
1430 biba_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1431 struct mbuf *m, struct label *mlabel)
1432 {
1433 struct mac_biba *dest;
1434
1435 dest = SLOT(mlabel);
1436
1437 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1438 }
1439
1440 static void
1441 biba_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1442 struct mbuf *m, struct label *mlabel)
1443 {
1444 struct mac_biba *dest;
1445
1446 dest = SLOT(mlabel);
1447
1448 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1449 }
1450
1451 static int
1452 biba_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1453 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1454 {
1455
1456 if(!biba_enabled)
1457 return (0);
1458
1459 /* XXX: This will be implemented soon... */
1460
1461 return (0);
1462 }
1463
1464 static int
1465 biba_pipe_check_poll(struct ucred *cred, struct pipepair *pp,
1466 struct label *pplabel)
1467 {
1468 struct mac_biba *subj, *obj;
1469
1470 if (!biba_enabled)
1471 return (0);
1472
1473 subj = SLOT(cred->cr_label);
1474 obj = SLOT(pplabel);
1475
1476 if (!biba_dominate_effective(obj, subj))
1477 return (EACCES);
1478
1479 return (0);
1480 }
1481
1482 static int
1483 biba_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1484 struct label *pplabel)
1485 {
1486 struct mac_biba *subj, *obj;
1487
1488 if (!biba_enabled)
1489 return (0);
1490
1491 subj = SLOT(cred->cr_label);
1492 obj = SLOT(pplabel);
1493
1494 if (!biba_dominate_effective(obj, subj))
1495 return (EACCES);
1496
1497 return (0);
1498 }
1499
1500 static int
1501 biba_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1502 struct label *pplabel, struct label *newlabel)
1503 {
1504 struct mac_biba *subj, *obj, *new;
1505 int error;
1506
1507 new = SLOT(newlabel);
1508 subj = SLOT(cred->cr_label);
1509 obj = SLOT(pplabel);
1510
1511 /*
1512 * If there is a Biba label update for a pipe, it must be a effective
1513 * update.
1514 */
1515 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
1516 if (error)
1517 return (error);
1518
1519 /*
1520 * To perform a relabel of a pipe (Biba label or not), Biba must
1521 * authorize the relabel.
1522 */
1523 if (!biba_effective_in_range(obj, subj))
1524 return (EPERM);
1525
1526 /*
1527 * If the Biba label is to be changed, authorize as appropriate.
1528 */
1529 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
1530 /*
1531 * To change the Biba label on a pipe, the new pipe label
1532 * must be in the subject range.
1533 */
1534 if (!biba_effective_in_range(new, subj))
1535 return (EPERM);
1536
1537 /*
1538 * To change the Biba label on a pipe to be EQUAL, the
1539 * subject must have appropriate privilege.
1540 */
1541 if (biba_contains_equal(new)) {
1542 error = biba_subject_privileged(subj);
1543 if (error)
1544 return (error);
1545 }
1546 }
1547
1548 return (0);
1549 }
1550
1551 static int
1552 biba_pipe_check_stat(struct ucred *cred, struct pipepair *pp,
1553 struct label *pplabel)
1554 {
1555 struct mac_biba *subj, *obj;
1556
1557 if (!biba_enabled)
1558 return (0);
1559
1560 subj = SLOT(cred->cr_label);
1561 obj = SLOT(pplabel);
1562
1563 if (!biba_dominate_effective(obj, subj))
1564 return (EACCES);
1565
1566 return (0);
1567 }
1568
1569 static int
1570 biba_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1571 struct label *pplabel)
1572 {
1573 struct mac_biba *subj, *obj;
1574
1575 if (!biba_enabled)
1576 return (0);
1577
1578 subj = SLOT(cred->cr_label);
1579 obj = SLOT(pplabel);
1580
1581 if (!biba_dominate_effective(subj, obj))
1582 return (EACCES);
1583
1584 return (0);
1585 }
1586
1587 static void
1588 biba_pipe_create(struct ucred *cred, struct pipepair *pp,
1589 struct label *pplabel)
1590 {
1591 struct mac_biba *source, *dest;
1592
1593 source = SLOT(cred->cr_label);
1594 dest = SLOT(pplabel);
1595
1596 biba_copy_effective(source, dest);
1597 }
1598
1599 static void
1600 biba_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1601 struct label *pplabel, struct label *newlabel)
1602 {
1603 struct mac_biba *source, *dest;
1604
1605 source = SLOT(newlabel);
1606 dest = SLOT(pplabel);
1607
1608 biba_copy(source, dest);
1609 }
1610
1611 static int
1612 biba_posixsem_check_openunlink(struct ucred *cred, struct ksem *ks,
1613 struct label *kslabel)
1614 {
1615 struct mac_biba *subj, *obj;
1616
1617 if (!biba_enabled)
1618 return (0);
1619
1620 subj = SLOT(cred->cr_label);
1621 obj = SLOT(kslabel);
1622
1623 if (!biba_dominate_effective(subj, obj))
1624 return (EACCES);
1625
1626 return (0);
1627 }
1628
1629 static int
1630 biba_posixsem_check_setmode(struct ucred *cred, struct ksem *ks,
1631 struct label *kslabel, mode_t mode)
1632 {
1633 struct mac_biba *subj, *obj;
1634
1635 if (!biba_enabled)
1636 return (0);
1637
1638 subj = SLOT(cred->cr_label);
1639 obj = SLOT(kslabel);
1640
1641 if (!biba_dominate_effective(subj, obj))
1642 return (EACCES);
1643
1644 return (0);
1645 }
1646
1647 static int
1648 biba_posixsem_check_setowner(struct ucred *cred, struct ksem *ks,
1649 struct label *kslabel, uid_t uid, gid_t gid)
1650 {
1651 struct mac_biba *subj, *obj;
1652
1653 if (!biba_enabled)
1654 return (0);
1655
1656 subj = SLOT(cred->cr_label);
1657 obj = SLOT(kslabel);
1658
1659 if (!biba_dominate_effective(subj, obj))
1660 return (EACCES);
1661
1662 return (0);
1663 }
1664
1665 static int
1666 biba_posixsem_check_write(struct ucred *active_cred, struct ucred *file_cred,
1667 struct ksem *ks, struct label *kslabel)
1668 {
1669 struct mac_biba *subj, *obj;
1670
1671 if (!biba_enabled)
1672 return (0);
1673
1674 subj = SLOT(active_cred->cr_label);
1675 obj = SLOT(kslabel);
1676
1677 if (!biba_dominate_effective(subj, obj))
1678 return (EACCES);
1679
1680 return (0);
1681 }
1682
1683 static int
1684 biba_posixsem_check_rdonly(struct ucred *active_cred, struct ucred *file_cred,
1685 struct ksem *ks, struct label *kslabel)
1686 {
1687 struct mac_biba *subj, *obj;
1688
1689 if (!biba_enabled)
1690 return (0);
1691
1692 subj = SLOT(active_cred->cr_label);
1693 obj = SLOT(kslabel);
1694
1695 if (!biba_dominate_effective(obj, subj))
1696 return (EACCES);
1697
1698 return (0);
1699 }
1700
1701 static void
1702 biba_posixsem_create(struct ucred *cred, struct ksem *ks,
1703 struct label *kslabel)
1704 {
1705 struct mac_biba *source, *dest;
1706
1707 source = SLOT(cred->cr_label);
1708 dest = SLOT(kslabel);
1709
1710 biba_copy_effective(source, dest);
1711 }
1712
1713 static int
1714 biba_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd,
1715 struct label *shmlabel, int prot, int flags)
1716 {
1717 struct mac_biba *subj, *obj;
1718
1719 if (!biba_enabled || !revocation_enabled)
1720 return (0);
1721
1722 subj = SLOT(cred->cr_label);
1723 obj = SLOT(shmlabel);
1724
1725 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
1726 if (!biba_dominate_effective(obj, subj))
1727 return (EACCES);
1728 }
1729 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
1730 if (!biba_dominate_effective(subj, obj))
1731 return (EACCES);
1732 }
1733
1734 return (0);
1735 }
1736
1737 static int
1738 biba_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd,
1739 struct label *shmlabel, accmode_t accmode)
1740 {
1741 struct mac_biba *subj, *obj;
1742
1743 if (!biba_enabled)
1744 return (0);
1745
1746 subj = SLOT(cred->cr_label);
1747 obj = SLOT(shmlabel);
1748
1749 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
1750 if (!biba_dominate_effective(obj, subj))
1751 return (EACCES);
1752 }
1753 if (accmode & VMODIFY_PERMS) {
1754 if (!biba_dominate_effective(subj, obj))
1755 return (EACCES);
1756 }
1757
1758 return (0);
1759 }
1760
1761 static int
1762 biba_posixshm_check_read(struct ucred *active_cred, struct ucred *file_cred,
1763 struct shmfd *vp, struct label *shmlabel)
1764 {
1765 struct mac_biba *subj, *obj;
1766
1767 if (!biba_enabled || !revocation_enabled)
1768 return (0);
1769
1770 subj = SLOT(active_cred->cr_label);
1771 obj = SLOT(shmlabel);
1772
1773 if (!biba_dominate_effective(obj, subj))
1774 return (EACCES);
1775
1776 return (0);
1777 }
1778
1779 static int
1780 biba_posixshm_check_setmode(struct ucred *cred, struct shmfd *shmfd,
1781 struct label *shmlabel, mode_t mode)
1782 {
1783 struct mac_biba *subj, *obj;
1784
1785 if (!biba_enabled)
1786 return (0);
1787
1788 subj = SLOT(cred->cr_label);
1789 obj = SLOT(shmlabel);
1790
1791 if (!biba_dominate_effective(subj, obj))
1792 return (EACCES);
1793
1794 return (0);
1795 }
1796
1797 static int
1798 biba_posixshm_check_setowner(struct ucred *cred, struct shmfd *shmfd,
1799 struct label *shmlabel, uid_t uid, gid_t gid)
1800 {
1801 struct mac_biba *subj, *obj;
1802
1803 if (!biba_enabled)
1804 return (0);
1805
1806 subj = SLOT(cred->cr_label);
1807 obj = SLOT(shmlabel);
1808
1809 if (!biba_dominate_effective(subj, obj))
1810 return (EACCES);
1811
1812 return (0);
1813 }
1814
1815 static int
1816 biba_posixshm_check_stat(struct ucred *active_cred, struct ucred *file_cred,
1817 struct shmfd *shmfd, struct label *shmlabel)
1818 {
1819 struct mac_biba *subj, *obj;
1820
1821 if (!biba_enabled)
1822 return (0);
1823
1824 subj = SLOT(active_cred->cr_label);
1825 obj = SLOT(shmlabel);
1826
1827 if (!biba_dominate_effective(obj, subj))
1828 return (EACCES);
1829
1830 return (0);
1831 }
1832
1833 static int
1834 biba_posixshm_check_truncate(struct ucred *active_cred,
1835 struct ucred *file_cred, struct shmfd *shmfd, struct label *shmlabel)
1836 {
1837 struct mac_biba *subj, *obj;
1838
1839 if (!biba_enabled)
1840 return (0);
1841
1842 subj = SLOT(active_cred->cr_label);
1843 obj = SLOT(shmlabel);
1844
1845 if (!biba_dominate_effective(subj, obj))
1846 return (EACCES);
1847
1848 return (0);
1849 }
1850
1851 static int
1852 biba_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd,
1853 struct label *shmlabel)
1854 {
1855 struct mac_biba *subj, *obj;
1856
1857 if (!biba_enabled)
1858 return (0);
1859
1860 subj = SLOT(cred->cr_label);
1861 obj = SLOT(shmlabel);
1862
1863 if (!biba_dominate_effective(subj, obj))
1864 return (EACCES);
1865
1866 return (0);
1867 }
1868
1869 static int
1870 biba_posixshm_check_write(struct ucred *active_cred, struct ucred *file_cred,
1871 struct shmfd *vp, struct label *shmlabel)
1872 {
1873 struct mac_biba *subj, *obj;
1874
1875 if (!biba_enabled || !revocation_enabled)
1876 return (0);
1877
1878 subj = SLOT(active_cred->cr_label);
1879 obj = SLOT(shmlabel);
1880
1881 if (!biba_dominate_effective(obj, subj))
1882 return (EACCES);
1883
1884 return (0);
1885 }
1886
1887 static void
1888 biba_posixshm_create(struct ucred *cred, struct shmfd *shmfd,
1889 struct label *shmlabel)
1890 {
1891 struct mac_biba *source, *dest;
1892
1893 source = SLOT(cred->cr_label);
1894 dest = SLOT(shmlabel);
1895
1896 biba_copy_effective(source, dest);
1897 }
1898
1899 /*
1900 * Some system privileges are allowed regardless of integrity grade; others
1901 * are allowed only when running with privilege with respect to the Biba
1902 * policy as they might otherwise allow bypassing of the integrity policy.
1903 */
1904 static int
1905 biba_priv_check(struct ucred *cred, int priv)
1906 {
1907 struct mac_biba *subj;
1908 int error;
1909
1910 if (!biba_enabled)
1911 return (0);
1912
1913 /*
1914 * Exempt only specific privileges from the Biba integrity policy.
1915 */
1916 switch (priv) {
1917 case PRIV_KTRACE:
1918 case PRIV_MSGBUF:
1919
1920 /*
1921 * Allow processes to manipulate basic process audit properties, and
1922 * to submit audit records.
1923 */
1924 case PRIV_AUDIT_GETAUDIT:
1925 case PRIV_AUDIT_SETAUDIT:
1926 case PRIV_AUDIT_SUBMIT:
1927
1928 /*
1929 * Allow processes to manipulate their regular UNIX credentials.
1930 */
1931 case PRIV_CRED_SETUID:
1932 case PRIV_CRED_SETEUID:
1933 case PRIV_CRED_SETGID:
1934 case PRIV_CRED_SETEGID:
1935 case PRIV_CRED_SETGROUPS:
1936 case PRIV_CRED_SETREUID:
1937 case PRIV_CRED_SETREGID:
1938 case PRIV_CRED_SETRESUID:
1939 case PRIV_CRED_SETRESGID:
1940
1941 /*
1942 * Allow processes to perform system monitoring.
1943 */
1944 case PRIV_SEEOTHERGIDS:
1945 case PRIV_SEEOTHERUIDS:
1946 break;
1947
1948 /*
1949 * Allow access to general process debugging facilities. We
1950 * separately control debugging based on MAC label.
1951 */
1952 case PRIV_DEBUG_DIFFCRED:
1953 case PRIV_DEBUG_SUGID:
1954 case PRIV_DEBUG_UNPRIV:
1955
1956 /*
1957 * Allow manipulating jails.
1958 */
1959 case PRIV_JAIL_ATTACH:
1960
1961 /*
1962 * Allow privilege with respect to the Partition policy, but not the
1963 * Privs policy.
1964 */
1965 case PRIV_MAC_PARTITION:
1966
1967 /*
1968 * Allow privilege with respect to process resource limits and login
1969 * context.
1970 */
1971 case PRIV_PROC_LIMIT:
1972 case PRIV_PROC_SETLOGIN:
1973 case PRIV_PROC_SETRLIMIT:
1974
1975 /*
1976 * Allow System V and POSIX IPC privileges.
1977 */
1978 case PRIV_IPC_READ:
1979 case PRIV_IPC_WRITE:
1980 case PRIV_IPC_ADMIN:
1981 case PRIV_IPC_MSGSIZE:
1982 case PRIV_MQ_ADMIN:
1983
1984 /*
1985 * Allow certain scheduler manipulations -- possibly this should be
1986 * controlled by more fine-grained policy, as potentially low
1987 * integrity processes can deny CPU to higher integrity ones.
1988 */
1989 case PRIV_SCHED_DIFFCRED:
1990 case PRIV_SCHED_SETPRIORITY:
1991 case PRIV_SCHED_RTPRIO:
1992 case PRIV_SCHED_SETPOLICY:
1993 case PRIV_SCHED_SET:
1994 case PRIV_SCHED_SETPARAM:
1995
1996 /*
1997 * More IPC privileges.
1998 */
1999 case PRIV_SEM_WRITE:
2000
2001 /*
2002 * Allow signaling privileges subject to integrity policy.
2003 */
2004 case PRIV_SIGNAL_DIFFCRED:
2005 case PRIV_SIGNAL_SUGID:
2006
2007 /*
2008 * Allow access to only limited sysctls from lower integrity levels;
2009 * piggy-back on the Jail definition.
2010 */
2011 case PRIV_SYSCTL_WRITEJAIL:
2012
2013 /*
2014 * Allow TTY-based privileges, subject to general device access using
2015 * labels on TTY device nodes, but not console privilege.
2016 */
2017 case PRIV_TTY_DRAINWAIT:
2018 case PRIV_TTY_DTRWAIT:
2019 case PRIV_TTY_EXCLUSIVE:
2020 case PRIV_TTY_STI:
2021 case PRIV_TTY_SETA:
2022
2023 /*
2024 * Grant most VFS privileges, as almost all are in practice bounded
2025 * by more specific checks using labels.
2026 */
2027 case PRIV_VFS_READ:
2028 case PRIV_VFS_WRITE:
2029 case PRIV_VFS_ADMIN:
2030 case PRIV_VFS_EXEC:
2031 case PRIV_VFS_LOOKUP:
2032 case PRIV_VFS_CHFLAGS_DEV:
2033 case PRIV_VFS_CHOWN:
2034 case PRIV_VFS_CHROOT:
2035 case PRIV_VFS_RETAINSUGID:
2036 case PRIV_VFS_EXCEEDQUOTA:
2037 case PRIV_VFS_FCHROOT:
2038 case PRIV_VFS_FHOPEN:
2039 case PRIV_VFS_FHSTATFS:
2040 case PRIV_VFS_GENERATION:
2041 case PRIV_VFS_GETFH:
2042 case PRIV_VFS_GETQUOTA:
2043 case PRIV_VFS_LINK:
2044 case PRIV_VFS_MOUNT:
2045 case PRIV_VFS_MOUNT_OWNER:
2046 case PRIV_VFS_MOUNT_PERM:
2047 case PRIV_VFS_MOUNT_SUIDDIR:
2048 case PRIV_VFS_MOUNT_NONUSER:
2049 case PRIV_VFS_SETGID:
2050 case PRIV_VFS_STICKYFILE:
2051 case PRIV_VFS_SYSFLAGS:
2052 case PRIV_VFS_UNMOUNT:
2053
2054 /*
2055 * Allow VM privileges; it would be nice if these were subject to
2056 * resource limits.
2057 */
2058 case PRIV_VM_MADV_PROTECT:
2059 case PRIV_VM_MLOCK:
2060 case PRIV_VM_MUNLOCK:
2061 case PRIV_VM_SWAP_NOQUOTA:
2062 case PRIV_VM_SWAP_NORLIMIT:
2063
2064 /*
2065 * Allow some but not all network privileges. In general, dont allow
2066 * reconfiguring the network stack, just normal use.
2067 */
2068 case PRIV_NETATALK_RESERVEDPORT:
2069 case PRIV_NETINET_RESERVEDPORT:
2070 case PRIV_NETINET_RAW:
2071 case PRIV_NETINET_REUSEPORT:
2072 case PRIV_NETIPX_RESERVEDPORT:
2073 case PRIV_NETIPX_RAW:
2074 break;
2075
2076 /*
2077 * All remaining system privileges are allow only if the process
2078 * holds privilege with respect to the Biba policy.
2079 */
2080 default:
2081 subj = SLOT(cred->cr_label);
2082 error = biba_subject_privileged(subj);
2083 if (error)
2084 return (error);
2085 }
2086 return (0);
2087 }
2088
2089 static int
2090 biba_proc_check_debug(struct ucred *cred, struct proc *p)
2091 {
2092 struct mac_biba *subj, *obj;
2093
2094 if (!biba_enabled)
2095 return (0);
2096
2097 subj = SLOT(cred->cr_label);
2098 obj = SLOT(p->p_ucred->cr_label);
2099
2100 /* XXX: range checks */
2101 if (!biba_dominate_effective(obj, subj))
2102 return (ESRCH);
2103 if (!biba_dominate_effective(subj, obj))
2104 return (EACCES);
2105
2106 return (0);
2107 }
2108
2109 static int
2110 biba_proc_check_sched(struct ucred *cred, struct proc *p)
2111 {
2112 struct mac_biba *subj, *obj;
2113
2114 if (!biba_enabled)
2115 return (0);
2116
2117 subj = SLOT(cred->cr_label);
2118 obj = SLOT(p->p_ucred->cr_label);
2119
2120 /* XXX: range checks */
2121 if (!biba_dominate_effective(obj, subj))
2122 return (ESRCH);
2123 if (!biba_dominate_effective(subj, obj))
2124 return (EACCES);
2125
2126 return (0);
2127 }
2128
2129 static int
2130 biba_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
2131 {
2132 struct mac_biba *subj, *obj;
2133
2134 if (!biba_enabled)
2135 return (0);
2136
2137 subj = SLOT(cred->cr_label);
2138 obj = SLOT(p->p_ucred->cr_label);
2139
2140 /* XXX: range checks */
2141 if (!biba_dominate_effective(obj, subj))
2142 return (ESRCH);
2143 if (!biba_dominate_effective(subj, obj))
2144 return (EACCES);
2145
2146 return (0);
2147 }
2148
2149 static int
2150 biba_socket_check_deliver(struct socket *so, struct label *solabel,
2151 struct mbuf *m, struct label *mlabel)
2152 {
2153 struct mac_biba *p, *s;
2154 int error;
2155
2156 if (!biba_enabled)
2157 return (0);
2158
2159 p = SLOT(mlabel);
2160 s = SLOT(solabel);
2161
2162 SOCK_LOCK(so);
2163 error = biba_equal_effective(p, s) ? 0 : EACCES;
2164 SOCK_UNLOCK(so);
2165 return (error);
2166 }
2167
2168 static int
2169 biba_socket_check_relabel(struct ucred *cred, struct socket *so,
2170 struct label *solabel, struct label *newlabel)
2171 {
2172 struct mac_biba *subj, *obj, *new;
2173 int error;
2174
2175 SOCK_LOCK_ASSERT(so);
2176
2177 new = SLOT(newlabel);
2178 subj = SLOT(cred->cr_label);
2179 obj = SLOT(solabel);
2180
2181 /*
2182 * If there is a Biba label update for the socket, it may be an
2183 * update of effective.
2184 */
2185 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
2186 if (error)
2187 return (error);
2188
2189 /*
2190 * To relabel a socket, the old socket effective must be in the
2191 * subject range.
2192 */
2193 if (!biba_effective_in_range(obj, subj))
2194 return (EPERM);
2195
2196 /*
2197 * If the Biba label is to be changed, authorize as appropriate.
2198 */
2199 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
2200 /*
2201 * To relabel a socket, the new socket effective must be in
2202 * the subject range.
2203 */
2204 if (!biba_effective_in_range(new, subj))
2205 return (EPERM);
2206
2207 /*
2208 * To change the Biba label on the socket to contain EQUAL,
2209 * the subject must have appropriate privilege.
2210 */
2211 if (biba_contains_equal(new)) {
2212 error = biba_subject_privileged(subj);
2213 if (error)
2214 return (error);
2215 }
2216 }
2217
2218 return (0);
2219 }
2220
2221 static int
2222 biba_socket_check_visible(struct ucred *cred, struct socket *so,
2223 struct label *solabel)
2224 {
2225 struct mac_biba *subj, *obj;
2226
2227 if (!biba_enabled)
2228 return (0);
2229
2230 subj = SLOT(cred->cr_label);
2231 obj = SLOT(solabel);
2232
2233 SOCK_LOCK(so);
2234 if (!biba_dominate_effective(obj, subj)) {
2235 SOCK_UNLOCK(so);
2236 return (ENOENT);
2237 }
2238 SOCK_UNLOCK(so);
2239
2240 return (0);
2241 }
2242
2243 static void
2244 biba_socket_create(struct ucred *cred, struct socket *so,
2245 struct label *solabel)
2246 {
2247 struct mac_biba *source, *dest;
2248
2249 source = SLOT(cred->cr_label);
2250 dest = SLOT(solabel);
2251
2252 biba_copy_effective(source, dest);
2253 }
2254
2255 static void
2256 biba_socket_create_mbuf(struct socket *so, struct label *solabel,
2257 struct mbuf *m, struct label *mlabel)
2258 {
2259 struct mac_biba *source, *dest;
2260
2261 source = SLOT(solabel);
2262 dest = SLOT(mlabel);
2263
2264 SOCK_LOCK(so);
2265 biba_copy_effective(source, dest);
2266 SOCK_UNLOCK(so);
2267 }
2268
2269 static void
2270 biba_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2271 struct socket *newso, struct label *newsolabel)
2272 {
2273 struct mac_biba source, *dest;
2274
2275 SOCK_LOCK(oldso);
2276 source = *SLOT(oldsolabel);
2277 SOCK_UNLOCK(oldso);
2278
2279 dest = SLOT(newsolabel);
2280
2281 SOCK_LOCK(newso);
2282 biba_copy_effective(&source, dest);
2283 SOCK_UNLOCK(newso);
2284 }
2285
2286 static void
2287 biba_socket_relabel(struct ucred *cred, struct socket *so,
2288 struct label *solabel, struct label *newlabel)
2289 {
2290 struct mac_biba *source, *dest;
2291
2292 SOCK_LOCK_ASSERT(so);
2293
2294 source = SLOT(newlabel);
2295 dest = SLOT(solabel);
2296
2297 biba_copy(source, dest);
2298 }
2299
2300 static void
2301 biba_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2302 struct socket *so, struct label *sopeerlabel)
2303 {
2304 struct mac_biba *source, *dest;
2305
2306 source = SLOT(mlabel);
2307 dest = SLOT(sopeerlabel);
2308
2309 SOCK_LOCK(so);
2310 biba_copy_effective(source, dest);
2311 SOCK_UNLOCK(so);
2312 }
2313
2314 static void
2315 biba_socketpeer_set_from_socket(struct socket *oldso,
2316 struct label *oldsolabel, struct socket *newso,
2317 struct label *newsopeerlabel)
2318 {
2319 struct mac_biba source, *dest;
2320
2321 SOCK_LOCK(oldso);
2322 source = *SLOT(oldsolabel);
2323 SOCK_UNLOCK(oldso);
2324 dest = SLOT(newsopeerlabel);
2325
2326 SOCK_LOCK(newso);
2327 biba_copy_effective(&source, dest);
2328 SOCK_UNLOCK(newso);
2329 }
2330
2331 static void
2332 biba_syncache_create(struct label *label, struct inpcb *inp)
2333 {
2334 struct mac_biba *source, *dest;
2335
2336 source = SLOT(inp->inp_label);
2337 dest = SLOT(label);
2338 biba_copy_effective(source, dest);
2339 }
2340
2341 static void
2342 biba_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2343 struct label *mlabel)
2344 {
2345 struct mac_biba *source, *dest;
2346
2347 source = SLOT(sc_label);
2348 dest = SLOT(mlabel);
2349 biba_copy_effective(source, dest);
2350 }
2351
2352 static int
2353 biba_system_check_acct(struct ucred *cred, struct vnode *vp,
2354 struct label *vplabel)
2355 {
2356 struct mac_biba *subj, *obj;
2357 int error;
2358
2359 if (!biba_enabled)
2360 return (0);
2361
2362 subj = SLOT(cred->cr_label);
2363
2364 error = biba_subject_privileged(subj);
2365 if (error)
2366 return (error);
2367
2368 if (vplabel == NULL)
2369 return (0);
2370
2371 obj = SLOT(vplabel);
2372 if (!biba_high_effective(obj))
2373 return (EACCES);
2374
2375 return (0);
2376 }
2377
2378 static int
2379 biba_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2380 struct label *vplabel)
2381 {
2382 struct mac_biba *subj, *obj;
2383 int error;
2384
2385 if (!biba_enabled)
2386 return (0);
2387
2388 subj = SLOT(cred->cr_label);
2389
2390 error = biba_subject_privileged(subj);
2391 if (error)
2392 return (error);
2393
2394 if (vplabel == NULL)
2395 return (0);
2396
2397 obj = SLOT(vplabel);
2398 if (!biba_high_effective(obj))
2399 return (EACCES);
2400
2401 return (0);
2402 }
2403
2404 static int
2405 biba_system_check_auditon(struct ucred *cred, int cmd)
2406 {
2407 struct mac_biba *subj;
2408 int error;
2409
2410 if (!biba_enabled)
2411 return (0);
2412
2413 subj = SLOT(cred->cr_label);
2414
2415 error = biba_subject_privileged(subj);
2416 if (error)
2417 return (error);
2418
2419 return (0);
2420 }
2421
2422 static int
2423 biba_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2424 struct label *label)
2425 {
2426 struct mac_biba *subj;
2427 int error;
2428
2429 if (!biba_enabled)
2430 return (0);
2431
2432 subj = SLOT(cred->cr_label);
2433
2434 error = biba_subject_privileged(subj);
2435 if (error)
2436 return (error);
2437
2438 return (0);
2439 }
2440
2441 static int
2442 biba_system_check_swapon(struct ucred *cred, struct vnode *vp,
2443 struct label *vplabel)
2444 {
2445 struct mac_biba *subj, *obj;
2446 int error;
2447
2448 if (!biba_enabled)
2449 return (0);
2450
2451 subj = SLOT(cred->cr_label);
2452 obj = SLOT(vplabel);
2453
2454 error = biba_subject_privileged(subj);
2455 if (error)
2456 return (error);
2457
2458 if (!biba_high_effective(obj))
2459 return (EACCES);
2460
2461 return (0);
2462 }
2463
2464 static int
2465 biba_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2466 void *arg1, int arg2, struct sysctl_req *req)
2467 {
2468 struct mac_biba *subj;
2469 int error;
2470
2471 if (!biba_enabled)
2472 return (0);
2473
2474 subj = SLOT(cred->cr_label);
2475
2476 /*
2477 * Treat sysctl variables without CTLFLAG_ANYBODY flag as biba/high,
2478 * but also require privilege to change them.
2479 */
2480 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2481 if (!biba_subject_dominate_high(subj))
2482 return (EACCES);
2483
2484 error = biba_subject_privileged(subj);
2485 if (error)
2486 return (error);
2487 }
2488
2489 return (0);
2490 }
2491
2492 static void
2493 biba_sysvmsg_cleanup(struct label *msglabel)
2494 {
2495
2496 bzero(SLOT(msglabel), sizeof(struct mac_biba));
2497 }
2498
2499 static void
2500 biba_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2501 struct label *msqlabel, struct msg *msgptr, struct label *msglabel)
2502 {
2503 struct mac_biba *source, *dest;
2504
2505 /* Ignore the msgq label */
2506 source = SLOT(cred->cr_label);
2507 dest = SLOT(msglabel);
2508
2509 biba_copy_effective(source, dest);
2510 }
2511
2512 static int
2513 biba_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr,
2514 struct label *msglabel)
2515 {
2516 struct mac_biba *subj, *obj;
2517
2518 if (!biba_enabled)
2519 return (0);
2520
2521 subj = SLOT(cred->cr_label);
2522 obj = SLOT(msglabel);
2523
2524 if (!biba_dominate_effective(obj, subj))
2525 return (EACCES);
2526
2527 return (0);
2528 }
2529
2530 static int
2531 biba_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr,
2532 struct label *msglabel)
2533 {
2534 struct mac_biba *subj, *obj;
2535
2536 if (!biba_enabled)
2537 return (0);
2538
2539 subj = SLOT(cred->cr_label);
2540 obj = SLOT(msglabel);
2541
2542 if (!biba_dominate_effective(subj, obj))
2543 return (EACCES);
2544
2545 return (0);
2546 }
2547
2548 static int
2549 biba_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr,
2550 struct label *msqklabel)
2551 {
2552 struct mac_biba *subj, *obj;
2553
2554 if (!biba_enabled)
2555 return (0);
2556
2557 subj = SLOT(cred->cr_label);
2558 obj = SLOT(msqklabel);
2559
2560 if (!biba_dominate_effective(obj, subj))
2561 return (EACCES);
2562
2563 return (0);
2564 }
2565
2566 static int
2567 biba_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr,
2568 struct label *msqklabel)
2569 {
2570 struct mac_biba *subj, *obj;
2571
2572 if (!biba_enabled)
2573 return (0);
2574
2575 subj = SLOT(cred->cr_label);
2576 obj = SLOT(msqklabel);
2577
2578 if (!biba_dominate_effective(subj, obj))
2579 return (EACCES);
2580
2581 return (0);
2582 }
2583
2584 static int
2585 biba_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr,
2586 struct label *msqklabel)
2587 {
2588 struct mac_biba *subj, *obj;
2589
2590 if (!biba_enabled)
2591 return (0);
2592
2593 subj = SLOT(cred->cr_label);
2594 obj = SLOT(msqklabel);
2595
2596 if (!biba_dominate_effective(obj, subj))
2597 return (EACCES);
2598
2599 return (0);
2600 }
2601
2602 static int
2603 biba_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
2604 struct label *msqklabel, int cmd)
2605 {
2606 struct mac_biba *subj, *obj;
2607
2608 if (!biba_enabled)
2609 return (0);
2610
2611 subj = SLOT(cred->cr_label);
2612 obj = SLOT(msqklabel);
2613
2614 switch(cmd) {
2615 case IPC_RMID:
2616 case IPC_SET:
2617 if (!biba_dominate_effective(subj, obj))
2618 return (EACCES);
2619 break;
2620
2621 case IPC_STAT:
2622 if (!biba_dominate_effective(obj, subj))
2623 return (EACCES);
2624 break;
2625
2626 default:
2627 return (EACCES);
2628 }
2629
2630 return (0);
2631 }
2632
2633 static void
2634 biba_sysvmsq_cleanup(struct label *msqlabel)
2635 {
2636
2637 bzero(SLOT(msqlabel), sizeof(struct mac_biba));
2638 }
2639
2640 static void
2641 biba_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2642 struct label *msqlabel)
2643 {
2644 struct mac_biba *source, *dest;
2645
2646 source = SLOT(cred->cr_label);
2647 dest = SLOT(msqlabel);
2648
2649 biba_copy_effective(source, dest);
2650 }
2651
2652 static int
2653 biba_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr,
2654 struct label *semaklabel, int cmd)
2655 {
2656 struct mac_biba *subj, *obj;
2657
2658 if (!biba_enabled)
2659 return (0);
2660
2661 subj = SLOT(cred->cr_label);
2662 obj = SLOT(semaklabel);
2663
2664 switch(cmd) {
2665 case IPC_RMID:
2666 case IPC_SET:
2667 case SETVAL:
2668 case SETALL:
2669 if (!biba_dominate_effective(subj, obj))
2670 return (EACCES);
2671 break;
2672
2673 case IPC_STAT:
2674 case GETVAL:
2675 case GETPID:
2676 case GETNCNT:
2677 case GETZCNT:
2678 case GETALL:
2679 if (!biba_dominate_effective(obj, subj))
2680 return (EACCES);
2681 break;
2682
2683 default:
2684 return (EACCES);
2685 }
2686
2687 return (0);
2688 }
2689
2690 static int
2691 biba_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr,
2692 struct label *semaklabel)
2693 {
2694 struct mac_biba *subj, *obj;
2695
2696 if (!biba_enabled)
2697 return (0);
2698
2699 subj = SLOT(cred->cr_label);
2700 obj = SLOT(semaklabel);
2701
2702 if (!biba_dominate_effective(obj, subj))
2703 return (EACCES);
2704
2705 return (0);
2706 }
2707
2708 static int
2709 biba_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr,
2710 struct label *semaklabel, size_t accesstype)
2711 {
2712 struct mac_biba *subj, *obj;
2713
2714 if (!biba_enabled)
2715 return (0);
2716
2717 subj = SLOT(cred->cr_label);
2718 obj = SLOT(semaklabel);
2719
2720 if (accesstype & SEM_R)
2721 if (!biba_dominate_effective(obj, subj))
2722 return (EACCES);
2723
2724 if (accesstype & SEM_A)
2725 if (!biba_dominate_effective(subj, obj))
2726 return (EACCES);
2727
2728 return (0);
2729 }
2730
2731 static void
2732 biba_sysvsem_cleanup(struct label *semalabel)
2733 {
2734
2735 bzero(SLOT(semalabel), sizeof(struct mac_biba));
2736 }
2737
2738 static void
2739 biba_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr,
2740 struct label *semalabel)
2741 {
2742 struct mac_biba *source, *dest;
2743
2744 source = SLOT(cred->cr_label);
2745 dest = SLOT(semalabel);
2746
2747 biba_copy_effective(source, dest);
2748 }
2749
2750 static int
2751 biba_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
2752 struct label *shmseglabel, int shmflg)
2753 {
2754 struct mac_biba *subj, *obj;
2755
2756 if (!biba_enabled)
2757 return (0);
2758
2759 subj = SLOT(cred->cr_label);
2760 obj = SLOT(shmseglabel);
2761
2762 if (!biba_dominate_effective(obj, subj))
2763 return (EACCES);
2764 if ((shmflg & SHM_RDONLY) == 0) {
2765 if (!biba_dominate_effective(subj, obj))
2766 return (EACCES);
2767 }
2768
2769 return (0);
2770 }
2771
2772 static int
2773 biba_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
2774 struct label *shmseglabel, int cmd)
2775 {
2776 struct mac_biba *subj, *obj;
2777
2778 if (!biba_enabled)
2779 return (0);
2780
2781 subj = SLOT(cred->cr_label);
2782 obj = SLOT(shmseglabel);
2783
2784 switch(cmd) {
2785 case IPC_RMID:
2786 case IPC_SET:
2787 if (!biba_dominate_effective(subj, obj))
2788 return (EACCES);
2789 break;
2790
2791 case IPC_STAT:
2792 case SHM_STAT:
2793 if (!biba_dominate_effective(obj, subj))
2794 return (EACCES);
2795 break;
2796
2797 default:
2798 return (EACCES);
2799 }
2800
2801 return (0);
2802 }
2803
2804 static int
2805 biba_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
2806 struct label *shmseglabel, int shmflg)
2807 {
2808 struct mac_biba *subj, *obj;
2809
2810 if (!biba_enabled)
2811 return (0);
2812
2813 subj = SLOT(cred->cr_label);
2814 obj = SLOT(shmseglabel);
2815
2816 if (!biba_dominate_effective(obj, subj))
2817 return (EACCES);
2818
2819 return (0);
2820 }
2821
2822 static void
2823 biba_sysvshm_cleanup(struct label *shmlabel)
2824 {
2825
2826 bzero(SLOT(shmlabel), sizeof(struct mac_biba));
2827 }
2828
2829 static void
2830 biba_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr,
2831 struct label *shmlabel)
2832 {
2833 struct mac_biba *source, *dest;
2834
2835 source = SLOT(cred->cr_label);
2836 dest = SLOT(shmlabel);
2837
2838 biba_copy_effective(source, dest);
2839 }
2840
2841 static int
2842 biba_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2843 struct vnode *vp, struct label *vplabel)
2844 {
2845 struct mac_biba mb_temp, *source, *dest;
2846 int buflen, error;
2847
2848 source = SLOT(mplabel);
2849 dest = SLOT(vplabel);
2850
2851 buflen = sizeof(mb_temp);
2852 bzero(&mb_temp, buflen);
2853
2854 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
2855 MAC_BIBA_EXTATTR_NAME, &buflen, (char *) &mb_temp, curthread);
2856 if (error == ENOATTR || error == EOPNOTSUPP) {
2857 /* Fall back to the mntlabel. */
2858 biba_copy_effective(source, dest);
2859 return (0);
2860 } else if (error)
2861 return (error);
2862
2863 if (buflen != sizeof(mb_temp)) {
2864 printf("biba_vnode_associate_extattr: bad size %d\n",
2865 buflen);
2866 return (EPERM);
2867 }
2868 if (biba_valid(&mb_temp) != 0) {
2869 printf("biba_vnode_associate_extattr: invalid\n");
2870 return (EPERM);
2871 }
2872 if ((mb_temp.mb_flags & MAC_BIBA_FLAGS_BOTH) !=
2873 MAC_BIBA_FLAG_EFFECTIVE) {
2874 printf("biba_vnode_associate_extattr: not effective\n");
2875 return (EPERM);
2876 }
2877
2878 biba_copy_effective(&mb_temp, dest);
2879 return (0);
2880 }
2881
2882 static void
2883 biba_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2884 struct vnode *vp, struct label *vplabel)
2885 {
2886 struct mac_biba *source, *dest;
2887
2888 source = SLOT(mplabel);
2889 dest = SLOT(vplabel);
2890
2891 biba_copy_effective(source, dest);
2892 }
2893
2894 static int
2895 biba_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
2896 struct label *dvplabel)
2897 {
2898 struct mac_biba *subj, *obj;
2899
2900 if (!biba_enabled)
2901 return (0);
2902
2903 subj = SLOT(cred->cr_label);
2904 obj = SLOT(dvplabel);
2905
2906 if (!biba_dominate_effective(obj, subj))
2907 return (EACCES);
2908
2909 return (0);
2910 }
2911
2912 static int
2913 biba_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
2914 struct label *dvplabel)
2915 {
2916 struct mac_biba *subj, *obj;
2917
2918 if (!biba_enabled)
2919 return (0);
2920
2921 subj = SLOT(cred->cr_label);
2922 obj = SLOT(dvplabel);
2923
2924 if (!biba_dominate_effective(obj, subj))
2925 return (EACCES);
2926
2927 return (0);
2928 }
2929
2930 static int
2931 biba_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2932 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2933 {
2934 struct mac_biba *subj, *obj;
2935
2936 if (!biba_enabled)
2937 return (0);
2938
2939 subj = SLOT(cred->cr_label);
2940 obj = SLOT(dvplabel);
2941
2942 if (!biba_dominate_effective(subj, obj))
2943 return (EACCES);
2944
2945 return (0);
2946 }
2947
2948 static int
2949 biba_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2950 struct label *vplabel, acl_type_t type)
2951 {
2952 struct mac_biba *subj, *obj;
2953
2954 if (!biba_enabled)
2955 return (0);
2956
2957 subj = SLOT(cred->cr_label);
2958 obj = SLOT(vplabel);
2959
2960 if (!biba_dominate_effective(subj, obj))
2961 return (EACCES);
2962
2963 return (0);
2964 }
2965
2966 static int
2967 biba_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
2968 struct label *vplabel, int attrnamespace, const char *name)
2969 {
2970 struct mac_biba *subj, *obj;
2971
2972 if (!biba_enabled)
2973 return (0);
2974
2975 subj = SLOT(cred->cr_label);
2976 obj = SLOT(vplabel);
2977
2978 if (!biba_dominate_effective(subj, obj))
2979 return (EACCES);
2980
2981 return (0);
2982 }
2983
2984 static int
2985 biba_vnode_check_exec(struct ucred *cred, struct vnode *vp,
2986 struct label *vplabel, struct image_params *imgp,
2987 struct label *execlabel)
2988 {
2989 struct mac_biba *subj, *obj, *exec;
2990 int error;
2991
2992 if (execlabel != NULL) {
2993 /*
2994 * We currently don't permit labels to be changed at
2995 * exec-time as part of Biba, so disallow non-NULL Biba label
2996 * elements in the execlabel.
2997 */
2998 exec = SLOT(execlabel);
2999 error = biba_atmostflags(exec, 0);
3000 if (error)
3001 return (error);
3002 }
3003
3004 if (!biba_enabled)
3005 return (0);
3006
3007 subj = SLOT(cred->cr_label);
3008 obj = SLOT(vplabel);
3009
3010 if (!biba_dominate_effective(obj, subj))
3011 return (EACCES);
3012
3013 return (0);
3014 }
3015
3016 static int
3017 biba_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
3018 struct label *vplabel, acl_type_t type)
3019 {
3020 struct mac_biba *subj, *obj;
3021
3022 if (!biba_enabled)
3023 return (0);
3024
3025 subj = SLOT(cred->cr_label);
3026 obj = SLOT(vplabel);
3027
3028 if (!biba_dominate_effective(obj, subj))
3029 return (EACCES);
3030
3031 return (0);
3032 }
3033
3034 static int
3035 biba_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
3036 struct label *vplabel, int attrnamespace, const char *name)
3037 {
3038 struct mac_biba *subj, *obj;
3039
3040 if (!biba_enabled)
3041 return (0);
3042
3043 subj = SLOT(cred->cr_label);
3044 obj = SLOT(vplabel);
3045
3046 if (!biba_dominate_effective(obj, subj))
3047 return (EACCES);
3048
3049 return (0);
3050 }
3051
3052 static int
3053 biba_vnode_check_link(struct ucred *cred, struct vnode *dvp,
3054 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3055 struct componentname *cnp)
3056 {
3057 struct mac_biba *subj, *obj;
3058
3059 if (!biba_enabled)
3060 return (0);
3061
3062 subj = SLOT(cred->cr_label);
3063 obj = SLOT(dvplabel);
3064
3065 if (!biba_dominate_effective(subj, obj))
3066 return (EACCES);
3067
3068 obj = SLOT(vplabel);
3069
3070 if (!biba_dominate_effective(subj, obj))
3071 return (EACCES);
3072
3073 return (0);
3074 }
3075
3076 static int
3077 biba_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
3078 struct label *vplabel, int attrnamespace)
3079 {
3080 struct mac_biba *subj, *obj;
3081
3082 if (!biba_enabled)
3083 return (0);
3084
3085 subj = SLOT(cred->cr_label);
3086 obj = SLOT(vplabel);
3087
3088 if (!biba_dominate_effective(obj, subj))
3089 return (EACCES);
3090
3091 return (0);
3092 }
3093
3094 static int
3095 biba_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
3096 struct label *dvplabel, struct componentname *cnp)
3097 {
3098 struct mac_biba *subj, *obj;
3099
3100 if (!biba_enabled)
3101 return (0);
3102
3103 subj = SLOT(cred->cr_label);
3104 obj = SLOT(dvplabel);
3105
3106 if (!biba_dominate_effective(obj, subj))
3107 return (EACCES);
3108
3109 return (0);
3110 }
3111
3112 static int
3113 biba_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
3114 struct label *vplabel, int prot, int flags)
3115 {
3116 struct mac_biba *subj, *obj;
3117
3118 /*
3119 * Rely on the use of open()-time protections to handle
3120 * non-revocation cases.
3121 */
3122 if (!biba_enabled || !revocation_enabled)
3123 return (0);
3124
3125 subj = SLOT(cred->cr_label);
3126 obj = SLOT(vplabel);
3127
3128 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
3129 if (!biba_dominate_effective(obj, subj))
3130 return (EACCES);
3131 }
3132 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
3133 if (!biba_dominate_effective(subj, obj))
3134 return (EACCES);
3135 }
3136
3137 return (0);
3138 }
3139
3140 static int
3141 biba_vnode_check_open(struct ucred *cred, struct vnode *vp,
3142 struct label *vplabel, accmode_t accmode)
3143 {
3144 struct mac_biba *subj, *obj;
3145
3146 if (!biba_enabled)
3147 return (0);
3148
3149 subj = SLOT(cred->cr_label);
3150 obj = SLOT(vplabel);
3151
3152 /* XXX privilege override for admin? */
3153 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
3154 if (!biba_dominate_effective(obj, subj))
3155 return (EACCES);
3156 }
3157 if (accmode & VMODIFY_PERMS) {
3158 if (!biba_dominate_effective(subj, obj))
3159 return (EACCES);
3160 }
3161
3162 return (0);
3163 }
3164
3165 static int
3166 biba_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
3167 struct vnode *vp, struct label *vplabel)
3168 {
3169 struct mac_biba *subj, *obj;
3170
3171 if (!biba_enabled || !revocation_enabled)
3172 return (0);
3173
3174 subj = SLOT(active_cred->cr_label);
3175 obj = SLOT(vplabel);
3176
3177 if (!biba_dominate_effective(obj, subj))
3178 return (EACCES);
3179
3180 return (0);
3181 }
3182
3183 static int
3184 biba_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
3185 struct vnode *vp, struct label *vplabel)
3186 {
3187 struct mac_biba *subj, *obj;
3188
3189 if (!biba_enabled || !revocation_enabled)
3190 return (0);
3191
3192 subj = SLOT(active_cred->cr_label);
3193 obj = SLOT(vplabel);
3194
3195 if (!biba_dominate_effective(obj, subj))
3196 return (EACCES);
3197
3198 return (0);
3199 }
3200
3201 static int
3202 biba_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
3203 struct label *dvplabel)
3204 {
3205 struct mac_biba *subj, *obj;
3206
3207 if (!biba_enabled)
3208 return (0);
3209
3210 subj = SLOT(cred->cr_label);
3211 obj = SLOT(dvplabel);
3212
3213 if (!biba_dominate_effective(obj, subj))
3214 return (EACCES);
3215
3216 return (0);
3217 }
3218
3219 static int
3220 biba_vnode_check_readlink(struct ucred *cred, struct vnode *vp,
3221 struct label *vplabel)
3222 {
3223 struct mac_biba *subj, *obj;
3224
3225 if (!biba_enabled)
3226 return (0);
3227
3228 subj = SLOT(cred->cr_label);
3229 obj = SLOT(vplabel);
3230
3231 if (!biba_dominate_effective(obj, subj))
3232 return (EACCES);
3233
3234 return (0);
3235 }
3236
3237 static int
3238 biba_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
3239 struct label *vplabel, struct label *newlabel)
3240 {
3241 struct mac_biba *old, *new, *subj;
3242 int error;
3243
3244 old = SLOT(vplabel);
3245 new = SLOT(newlabel);
3246 subj = SLOT(cred->cr_label);
3247
3248 /*
3249 * If there is a Biba label update for the vnode, it must be a
3250 * effective label.
3251 */
3252 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
3253 if (error)
3254 return (error);
3255
3256 /*
3257 * To perform a relabel of the vnode (Biba label or not), Biba must
3258 * authorize the relabel.
3259 */
3260 if (!biba_effective_in_range(old, subj))
3261 return (EPERM);
3262
3263 /*
3264 * If the Biba label is to be changed, authorize as appropriate.
3265 */
3266 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
3267 /*
3268 * To change the Biba label on a vnode, the new vnode label
3269 * must be in the subject range.
3270 */
3271 if (!biba_effective_in_range(new, subj))
3272 return (EPERM);
3273
3274 /*
3275 * To change the Biba label on the vnode to be EQUAL, the
3276 * subject must have appropriate privilege.
3277 */
3278 if (biba_contains_equal(new)) {
3279 error = biba_subject_privileged(subj);
3280 if (error)
3281 return (error);
3282 }
3283 }
3284
3285 return (0);
3286 }
3287
3288 static int
3289 biba_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
3290 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3291 struct componentname *cnp)
3292 {
3293 struct mac_biba *subj, *obj;
3294
3295 if (!biba_enabled)
3296 return (0);
3297
3298 subj = SLOT(cred->cr_label);
3299 obj = SLOT(dvplabel);
3300
3301 if (!biba_dominate_effective(subj, obj))
3302 return (EACCES);
3303
3304 obj = SLOT(vplabel);
3305
3306 if (!biba_dominate_effective(subj, obj))
3307 return (EACCES);
3308
3309 return (0);
3310 }
3311
3312 static int
3313 biba_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
3314 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3315 int samedir, struct componentname *cnp)
3316 {
3317 struct mac_biba *subj, *obj;
3318
3319 if (!biba_enabled)
3320 return (0);
3321
3322 subj = SLOT(cred->cr_label);
3323 obj = SLOT(dvplabel);
3324
3325 if (!biba_dominate_effective(subj, obj))
3326 return (EACCES);
3327
3328 if (vp != NULL) {
3329 obj = SLOT(vplabel);
3330
3331 if (!biba_dominate_effective(subj, obj))
3332 return (EACCES);
3333 }
3334
3335 return (0);
3336 }
3337
3338 static int
3339 biba_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
3340 struct label *vplabel)
3341 {
3342 struct mac_biba *subj, *obj;
3343
3344 if (!biba_enabled)
3345 return (0);
3346
3347 subj = SLOT(cred->cr_label);
3348 obj = SLOT(vplabel);
3349
3350 if (!biba_dominate_effective(subj, obj))
3351 return (EACCES);
3352
3353 return (0);
3354 }
3355
3356 static int
3357 biba_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
3358 struct label *vplabel, acl_type_t type, struct acl *acl)
3359 {
3360 struct mac_biba *subj, *obj;
3361
3362 if (!biba_enabled)
3363 return (0);
3364
3365 subj = SLOT(cred->cr_label);
3366 obj = SLOT(vplabel);
3367
3368 if (!biba_dominate_effective(subj, obj))
3369 return (EACCES);
3370
3371 return (0);
3372 }
3373
3374 static int
3375 biba_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
3376 struct label *vplabel, int attrnamespace, const char *name)
3377 {
3378 struct mac_biba *subj, *obj;
3379
3380 if (!biba_enabled)
3381 return (0);
3382
3383 subj = SLOT(cred->cr_label);
3384 obj = SLOT(vplabel);
3385
3386 if (!biba_dominate_effective(subj, obj))
3387 return (EACCES);
3388
3389 /* XXX: protect the MAC EA in a special way? */
3390
3391 return (0);
3392 }
3393
3394 static int
3395 biba_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
3396 struct label *vplabel, u_long flags)
3397 {
3398 struct mac_biba *subj, *obj;
3399
3400 if (!biba_enabled)
3401 return (0);
3402
3403 subj = SLOT(cred->cr_label);
3404 obj = SLOT(vplabel);
3405
3406 if (!biba_dominate_effective(subj, obj))
3407 return (EACCES);
3408
3409 return (0);
3410 }
3411
3412 static int
3413 biba_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
3414 struct label *vplabel, mode_t mode)
3415 {
3416 struct mac_biba *subj, *obj;
3417
3418 if (!biba_enabled)
3419 return (0);
3420
3421 subj = SLOT(cred->cr_label);
3422 obj = SLOT(vplabel);
3423
3424 if (!biba_dominate_effective(subj, obj))
3425 return (EACCES);
3426
3427 return (0);
3428 }
3429
3430 static int
3431 biba_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
3432 struct label *vplabel, uid_t uid, gid_t gid)
3433 {
3434 struct mac_biba *subj, *obj;
3435
3436 if (!biba_enabled)
3437 return (0);
3438
3439 subj = SLOT(cred->cr_label);
3440 obj = SLOT(vplabel);
3441
3442 if (!biba_dominate_effective(subj, obj))
3443 return (EACCES);
3444
3445 return (0);
3446 }
3447
3448 static int
3449 biba_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
3450 struct label *vplabel, struct timespec atime, struct timespec mtime)
3451 {
3452 struct mac_biba *subj, *obj;
3453
3454 if (!biba_enabled)
3455 return (0);
3456
3457 subj = SLOT(cred->cr_label);
3458 obj = SLOT(vplabel);
3459
3460 if (!biba_dominate_effective(subj, obj))
3461 return (EACCES);
3462
3463 return (0);
3464 }
3465
3466 static int
3467 biba_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred,
3468 struct vnode *vp, struct label *vplabel)
3469 {
3470 struct mac_biba *subj, *obj;
3471
3472 if (!biba_enabled)
3473 return (0);
3474
3475 subj = SLOT(active_cred->cr_label);
3476 obj = SLOT(vplabel);
3477
3478 if (!biba_dominate_effective(obj, subj))
3479 return (EACCES);
3480
3481 return (0);
3482 }
3483
3484 static int
3485 biba_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
3486 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3487 struct componentname *cnp)
3488 {
3489 struct mac_biba *subj, *obj;
3490
3491 if (!biba_enabled)
3492 return (0);
3493
3494 subj = SLOT(cred->cr_label);
3495 obj = SLOT(dvplabel);
3496
3497 if (!biba_dominate_effective(subj, obj))
3498 return (EACCES);
3499
3500 obj = SLOT(vplabel);
3501
3502 if (!biba_dominate_effective(subj, obj))
3503 return (EACCES);
3504
3505 return (0);
3506 }
3507
3508 static int
3509 biba_vnode_check_write(struct ucred *active_cred,
3510 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
3511 {
3512 struct mac_biba *subj, *obj;
3513
3514 if (!biba_enabled || !revocation_enabled)
3515 return (0);
3516
3517 subj = SLOT(active_cred->cr_label);
3518 obj = SLOT(vplabel);
3519
3520 if (!biba_dominate_effective(subj, obj))
3521 return (EACCES);
3522
3523 return (0);
3524 }
3525
3526 static int
3527 biba_vnode_create_extattr(struct ucred *cred, struct mount *mp,
3528 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
3529 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
3530 {
3531 struct mac_biba *source, *dest, mb_temp;
3532 size_t buflen;
3533 int error;
3534
3535 buflen = sizeof(mb_temp);
3536 bzero(&mb_temp, buflen);
3537
3538 source = SLOT(cred->cr_label);
3539 dest = SLOT(vplabel);
3540 biba_copy_effective(source, &mb_temp);
3541
3542 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3543 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3544 if (error == 0)
3545 biba_copy_effective(source, dest);
3546 return (error);
3547 }
3548
3549 static void
3550 biba_vnode_relabel(struct ucred *cred, struct vnode *vp,
3551 struct label *vplabel, struct label *newlabel)
3552 {
3553 struct mac_biba *source, *dest;
3554
3555 source = SLOT(newlabel);
3556 dest = SLOT(vplabel);
3557
3558 biba_copy(source, dest);
3559 }
3560
3561 static int
3562 biba_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
3563 struct label *vplabel, struct label *intlabel)
3564 {
3565 struct mac_biba *source, mb_temp;
3566 size_t buflen;
3567 int error;
3568
3569 buflen = sizeof(mb_temp);
3570 bzero(&mb_temp, buflen);
3571
3572 source = SLOT(intlabel);
3573 if ((source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) == 0)
3574 return (0);
3575
3576 biba_copy_effective(source, &mb_temp);
3577
3578 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3579 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3580 return (error);
3581 }
3582
3583 static struct mac_policy_ops mac_biba_ops =
3584 {
3585 .mpo_init = biba_init,
3586
3587 .mpo_bpfdesc_check_receive = biba_bpfdesc_check_receive,
3588 .mpo_bpfdesc_create = biba_bpfdesc_create,
3589 .mpo_bpfdesc_create_mbuf = biba_bpfdesc_create_mbuf,
3590 .mpo_bpfdesc_destroy_label = biba_destroy_label,
3591 .mpo_bpfdesc_init_label = biba_init_label,
3592
3593 .mpo_cred_associate_nfsd = biba_cred_associate_nfsd,
3594 .mpo_cred_check_relabel = biba_cred_check_relabel,
3595 .mpo_cred_check_visible = biba_cred_check_visible,
3596 .mpo_cred_copy_label = biba_copy_label,
3597 .mpo_cred_create_init = biba_cred_create_init,
3598 .mpo_cred_create_swapper = biba_cred_create_swapper,
3599 .mpo_cred_destroy_label = biba_destroy_label,
3600 .mpo_cred_externalize_label = biba_externalize_label,
3601 .mpo_cred_init_label = biba_init_label,
3602 .mpo_cred_internalize_label = biba_internalize_label,
3603 .mpo_cred_relabel = biba_cred_relabel,
3604
3605 .mpo_devfs_create_device = biba_devfs_create_device,
3606 .mpo_devfs_create_directory = biba_devfs_create_directory,
3607 .mpo_devfs_create_symlink = biba_devfs_create_symlink,
3608 .mpo_devfs_destroy_label = biba_destroy_label,
3609 .mpo_devfs_init_label = biba_init_label,
3610 .mpo_devfs_update = biba_devfs_update,
3611 .mpo_devfs_vnode_associate = biba_devfs_vnode_associate,
3612
3613 .mpo_ifnet_check_relabel = biba_ifnet_check_relabel,
3614 .mpo_ifnet_check_transmit = biba_ifnet_check_transmit,
3615 .mpo_ifnet_copy_label = biba_copy_label,
3616 .mpo_ifnet_create = biba_ifnet_create,
3617 .mpo_ifnet_create_mbuf = biba_ifnet_create_mbuf,
3618 .mpo_ifnet_destroy_label = biba_destroy_label,
3619 .mpo_ifnet_externalize_label = biba_externalize_label,
3620 .mpo_ifnet_init_label = biba_init_label,
3621 .mpo_ifnet_internalize_label = biba_internalize_label,
3622 .mpo_ifnet_relabel = biba_ifnet_relabel,
3623
3624 .mpo_inpcb_check_deliver = biba_inpcb_check_deliver,
3625 .mpo_inpcb_check_visible = biba_inpcb_check_visible,
3626 .mpo_inpcb_create = biba_inpcb_create,
3627 .mpo_inpcb_create_mbuf = biba_inpcb_create_mbuf,
3628 .mpo_inpcb_destroy_label = biba_destroy_label,
3629 .mpo_inpcb_init_label = biba_init_label_waitcheck,
3630 .mpo_inpcb_sosetlabel = biba_inpcb_sosetlabel,
3631
3632 .mpo_ip6q_create = biba_ip6q_create,
3633 .mpo_ip6q_destroy_label = biba_destroy_label,
3634 .mpo_ip6q_init_label = biba_init_label_waitcheck,
3635 .mpo_ip6q_match = biba_ip6q_match,
3636 .mpo_ip6q_reassemble = biba_ip6q_reassemble,
3637 .mpo_ip6q_update = biba_ip6q_update,
3638
3639 .mpo_ipq_create = biba_ipq_create,
3640 .mpo_ipq_destroy_label = biba_destroy_label,
3641 .mpo_ipq_init_label = biba_init_label_waitcheck,
3642 .mpo_ipq_match = biba_ipq_match,
3643 .mpo_ipq_reassemble = biba_ipq_reassemble,
3644 .mpo_ipq_update = biba_ipq_update,
3645
3646 .mpo_kld_check_load = biba_kld_check_load,
3647
3648 .mpo_mbuf_copy_label = biba_copy_label,
3649 .mpo_mbuf_destroy_label = biba_destroy_label,
3650 .mpo_mbuf_init_label = biba_init_label_waitcheck,
3651
3652 .mpo_mount_check_stat = biba_mount_check_stat,
3653 .mpo_mount_create = biba_mount_create,
3654 .mpo_mount_destroy_label = biba_destroy_label,
3655 .mpo_mount_init_label = biba_init_label,
3656
3657 .mpo_netatalk_aarp_send = biba_netatalk_aarp_send,
3658
3659 .mpo_netinet_arp_send = biba_netinet_arp_send,
3660 .mpo_netinet_firewall_reply = biba_netinet_firewall_reply,
3661 .mpo_netinet_firewall_send = biba_netinet_firewall_send,
3662 .mpo_netinet_fragment = biba_netinet_fragment,
3663 .mpo_netinet_icmp_reply = biba_netinet_icmp_reply,
3664 .mpo_netinet_igmp_send = biba_netinet_igmp_send,
3665
3666 .mpo_netinet6_nd6_send = biba_netinet6_nd6_send,
3667
3668 .mpo_pipe_check_ioctl = biba_pipe_check_ioctl,
3669 .mpo_pipe_check_poll = biba_pipe_check_poll,
3670 .mpo_pipe_check_read = biba_pipe_check_read,
3671 .mpo_pipe_check_relabel = biba_pipe_check_relabel,
3672 .mpo_pipe_check_stat = biba_pipe_check_stat,
3673 .mpo_pipe_check_write = biba_pipe_check_write,
3674 .mpo_pipe_copy_label = biba_copy_label,
3675 .mpo_pipe_create = biba_pipe_create,
3676 .mpo_pipe_destroy_label = biba_destroy_label,
3677 .mpo_pipe_externalize_label = biba_externalize_label,
3678 .mpo_pipe_init_label = biba_init_label,
3679 .mpo_pipe_internalize_label = biba_internalize_label,
3680 .mpo_pipe_relabel = biba_pipe_relabel,
3681
3682 .mpo_posixsem_check_getvalue = biba_posixsem_check_rdonly,
3683 .mpo_posixsem_check_open = biba_posixsem_check_openunlink,
3684 .mpo_posixsem_check_post = biba_posixsem_check_write,
3685 .mpo_posixsem_check_setmode = biba_posixsem_check_setmode,
3686 .mpo_posixsem_check_setowner = biba_posixsem_check_setowner,
3687 .mpo_posixsem_check_stat = biba_posixsem_check_rdonly,
3688 .mpo_posixsem_check_unlink = biba_posixsem_check_openunlink,
3689 .mpo_posixsem_check_wait = biba_posixsem_check_write,
3690 .mpo_posixsem_create = biba_posixsem_create,
3691 .mpo_posixsem_destroy_label = biba_destroy_label,
3692 .mpo_posixsem_init_label = biba_init_label,
3693
3694 .mpo_posixshm_check_mmap = biba_posixshm_check_mmap,
3695 .mpo_posixshm_check_open = biba_posixshm_check_open,
3696 .mpo_posixshm_check_read = biba_posixshm_check_read,
3697 .mpo_posixshm_check_setmode = biba_posixshm_check_setmode,
3698 .mpo_posixshm_check_setowner = biba_posixshm_check_setowner,
3699 .mpo_posixshm_check_stat = biba_posixshm_check_stat,
3700 .mpo_posixshm_check_truncate = biba_posixshm_check_truncate,
3701 .mpo_posixshm_check_unlink = biba_posixshm_check_unlink,
3702 .mpo_posixshm_check_write = biba_posixshm_check_write,
3703 .mpo_posixshm_create = biba_posixshm_create,
3704 .mpo_posixshm_destroy_label = biba_destroy_label,
3705 .mpo_posixshm_init_label = biba_init_label,
3706
3707 .mpo_priv_check = biba_priv_check,
3708
3709 .mpo_proc_check_debug = biba_proc_check_debug,
3710 .mpo_proc_check_sched = biba_proc_check_sched,
3711 .mpo_proc_check_signal = biba_proc_check_signal,
3712
3713 .mpo_socket_check_deliver = biba_socket_check_deliver,
3714 .mpo_socket_check_relabel = biba_socket_check_relabel,
3715 .mpo_socket_check_visible = biba_socket_check_visible,
3716 .mpo_socket_copy_label = biba_copy_label,
3717 .mpo_socket_create = biba_socket_create,
3718 .mpo_socket_create_mbuf = biba_socket_create_mbuf,
3719 .mpo_socket_destroy_label = biba_destroy_label,
3720 .mpo_socket_externalize_label = biba_externalize_label,
3721 .mpo_socket_init_label = biba_init_label_waitcheck,
3722 .mpo_socket_internalize_label = biba_internalize_label,
3723 .mpo_socket_newconn = biba_socket_newconn,
3724 .mpo_socket_relabel = biba_socket_relabel,
3725
3726 .mpo_socketpeer_destroy_label = biba_destroy_label,
3727 .mpo_socketpeer_externalize_label = biba_externalize_label,
3728 .mpo_socketpeer_init_label = biba_init_label_waitcheck,
3729 .mpo_socketpeer_set_from_mbuf = biba_socketpeer_set_from_mbuf,
3730 .mpo_socketpeer_set_from_socket = biba_socketpeer_set_from_socket,
3731
3732 .mpo_syncache_create = biba_syncache_create,
3733 .mpo_syncache_create_mbuf = biba_syncache_create_mbuf,
3734 .mpo_syncache_destroy_label = biba_destroy_label,
3735 .mpo_syncache_init_label = biba_init_label_waitcheck,
3736
3737 .mpo_system_check_acct = biba_system_check_acct,
3738 .mpo_system_check_auditctl = biba_system_check_auditctl,
3739 .mpo_system_check_auditon = biba_system_check_auditon,
3740 .mpo_system_check_swapoff = biba_system_check_swapoff,
3741 .mpo_system_check_swapon = biba_system_check_swapon,
3742 .mpo_system_check_sysctl = biba_system_check_sysctl,
3743
3744 .mpo_sysvmsg_cleanup = biba_sysvmsg_cleanup,
3745 .mpo_sysvmsg_create = biba_sysvmsg_create,
3746 .mpo_sysvmsg_destroy_label = biba_destroy_label,
3747 .mpo_sysvmsg_init_label = biba_init_label,
3748
3749 .mpo_sysvmsq_check_msgrcv = biba_sysvmsq_check_msgrcv,
3750 .mpo_sysvmsq_check_msgrmid = biba_sysvmsq_check_msgrmid,
3751 .mpo_sysvmsq_check_msqget = biba_sysvmsq_check_msqget,
3752 .mpo_sysvmsq_check_msqsnd = biba_sysvmsq_check_msqsnd,
3753 .mpo_sysvmsq_check_msqrcv = biba_sysvmsq_check_msqrcv,
3754 .mpo_sysvmsq_check_msqctl = biba_sysvmsq_check_msqctl,
3755 .mpo_sysvmsq_cleanup = biba_sysvmsq_cleanup,
3756 .mpo_sysvmsq_create = biba_sysvmsq_create,
3757 .mpo_sysvmsq_destroy_label = biba_destroy_label,
3758 .mpo_sysvmsq_init_label = biba_init_label,
3759
3760 .mpo_sysvsem_check_semctl = biba_sysvsem_check_semctl,
3761 .mpo_sysvsem_check_semget = biba_sysvsem_check_semget,
3762 .mpo_sysvsem_check_semop = biba_sysvsem_check_semop,
3763 .mpo_sysvsem_cleanup = biba_sysvsem_cleanup,
3764 .mpo_sysvsem_create = biba_sysvsem_create,
3765 .mpo_sysvsem_destroy_label = biba_destroy_label,
3766 .mpo_sysvsem_init_label = biba_init_label,
3767
3768 .mpo_sysvshm_check_shmat = biba_sysvshm_check_shmat,
3769 .mpo_sysvshm_check_shmctl = biba_sysvshm_check_shmctl,
3770 .mpo_sysvshm_check_shmget = biba_sysvshm_check_shmget,
3771 .mpo_sysvshm_cleanup = biba_sysvshm_cleanup,
3772 .mpo_sysvshm_create = biba_sysvshm_create,
3773 .mpo_sysvshm_destroy_label = biba_destroy_label,
3774 .mpo_sysvshm_init_label = biba_init_label,
3775
3776 .mpo_vnode_associate_extattr = biba_vnode_associate_extattr,
3777 .mpo_vnode_associate_singlelabel = biba_vnode_associate_singlelabel,
3778 .mpo_vnode_check_access = biba_vnode_check_open,
3779 .mpo_vnode_check_chdir = biba_vnode_check_chdir,
3780 .mpo_vnode_check_chroot = biba_vnode_check_chroot,
3781 .mpo_vnode_check_create = biba_vnode_check_create,
3782 .mpo_vnode_check_deleteacl = biba_vnode_check_deleteacl,
3783 .mpo_vnode_check_deleteextattr = biba_vnode_check_deleteextattr,
3784 .mpo_vnode_check_exec = biba_vnode_check_exec,
3785 .mpo_vnode_check_getacl = biba_vnode_check_getacl,
3786 .mpo_vnode_check_getextattr = biba_vnode_check_getextattr,
3787 .mpo_vnode_check_link = biba_vnode_check_link,
3788 .mpo_vnode_check_listextattr = biba_vnode_check_listextattr,
3789 .mpo_vnode_check_lookup = biba_vnode_check_lookup,
3790 .mpo_vnode_check_mmap = biba_vnode_check_mmap,
3791 .mpo_vnode_check_open = biba_vnode_check_open,
3792 .mpo_vnode_check_poll = biba_vnode_check_poll,
3793 .mpo_vnode_check_read = biba_vnode_check_read,
3794 .mpo_vnode_check_readdir = biba_vnode_check_readdir,
3795 .mpo_vnode_check_readlink = biba_vnode_check_readlink,
3796 .mpo_vnode_check_relabel = biba_vnode_check_relabel,
3797 .mpo_vnode_check_rename_from = biba_vnode_check_rename_from,
3798 .mpo_vnode_check_rename_to = biba_vnode_check_rename_to,
3799 .mpo_vnode_check_revoke = biba_vnode_check_revoke,
3800 .mpo_vnode_check_setacl = biba_vnode_check_setacl,
3801 .mpo_vnode_check_setextattr = biba_vnode_check_setextattr,
3802 .mpo_vnode_check_setflags = biba_vnode_check_setflags,
3803 .mpo_vnode_check_setmode = biba_vnode_check_setmode,
3804 .mpo_vnode_check_setowner = biba_vnode_check_setowner,
3805 .mpo_vnode_check_setutimes = biba_vnode_check_setutimes,
3806 .mpo_vnode_check_stat = biba_vnode_check_stat,
3807 .mpo_vnode_check_unlink = biba_vnode_check_unlink,
3808 .mpo_vnode_check_write = biba_vnode_check_write,
3809 .mpo_vnode_create_extattr = biba_vnode_create_extattr,
3810 .mpo_vnode_copy_label = biba_copy_label,
3811 .mpo_vnode_destroy_label = biba_destroy_label,
3812 .mpo_vnode_externalize_label = biba_externalize_label,
3813 .mpo_vnode_init_label = biba_init_label,
3814 .mpo_vnode_internalize_label = biba_internalize_label,
3815 .mpo_vnode_relabel = biba_vnode_relabel,
3816 .mpo_vnode_setlabel_extattr = biba_vnode_setlabel_extattr,
3817 };
3818
3819 MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
3820 MPC_LOADTIME_FLAG_NOTLATE, &biba_slot);
Cache object: 67a35bd50cf72c2a637fb158a77b8b05
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