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 * $FreeBSD$
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_setmode(struct ucred *cred, struct shmfd *shmfd,
1763 struct label *shmlabel, mode_t mode)
1764 {
1765 struct mac_biba *subj, *obj;
1766
1767 if (!biba_enabled)
1768 return (0);
1769
1770 subj = SLOT(cred->cr_label);
1771 obj = SLOT(shmlabel);
1772
1773 if (!biba_dominate_effective(subj, obj))
1774 return (EACCES);
1775
1776 return (0);
1777 }
1778
1779 static int
1780 biba_posixshm_check_setowner(struct ucred *cred, struct shmfd *shmfd,
1781 struct label *shmlabel, uid_t uid, gid_t gid)
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_stat(struct ucred *active_cred, struct ucred *file_cred,
1799 struct shmfd *shmfd, struct label *shmlabel)
1800 {
1801 struct mac_biba *subj, *obj;
1802
1803 if (!biba_enabled)
1804 return (0);
1805
1806 subj = SLOT(active_cred->cr_label);
1807 obj = SLOT(shmlabel);
1808
1809 if (!biba_dominate_effective(obj, subj))
1810 return (EACCES);
1811
1812 return (0);
1813 }
1814
1815 static int
1816 biba_posixshm_check_truncate(struct ucred *active_cred,
1817 struct ucred *file_cred, 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(subj, obj))
1828 return (EACCES);
1829
1830 return (0);
1831 }
1832
1833 static int
1834 biba_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd,
1835 struct label *shmlabel)
1836 {
1837 struct mac_biba *subj, *obj;
1838
1839 if (!biba_enabled)
1840 return (0);
1841
1842 subj = SLOT(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 void
1852 biba_posixshm_create(struct ucred *cred, struct shmfd *shmfd,
1853 struct label *shmlabel)
1854 {
1855 struct mac_biba *source, *dest;
1856
1857 source = SLOT(cred->cr_label);
1858 dest = SLOT(shmlabel);
1859
1860 biba_copy_effective(source, dest);
1861 }
1862
1863 /*
1864 * Some system privileges are allowed regardless of integrity grade; others
1865 * are allowed only when running with privilege with respect to the Biba
1866 * policy as they might otherwise allow bypassing of the integrity policy.
1867 */
1868 static int
1869 biba_priv_check(struct ucred *cred, int priv)
1870 {
1871 struct mac_biba *subj;
1872 int error;
1873
1874 if (!biba_enabled)
1875 return (0);
1876
1877 /*
1878 * Exempt only specific privileges from the Biba integrity policy.
1879 */
1880 switch (priv) {
1881 case PRIV_KTRACE:
1882 case PRIV_MSGBUF:
1883
1884 /*
1885 * Allow processes to manipulate basic process audit properties, and
1886 * to submit audit records.
1887 */
1888 case PRIV_AUDIT_GETAUDIT:
1889 case PRIV_AUDIT_SETAUDIT:
1890 case PRIV_AUDIT_SUBMIT:
1891
1892 /*
1893 * Allow processes to manipulate their regular UNIX credentials.
1894 */
1895 case PRIV_CRED_SETUID:
1896 case PRIV_CRED_SETEUID:
1897 case PRIV_CRED_SETGID:
1898 case PRIV_CRED_SETEGID:
1899 case PRIV_CRED_SETGROUPS:
1900 case PRIV_CRED_SETREUID:
1901 case PRIV_CRED_SETREGID:
1902 case PRIV_CRED_SETRESUID:
1903 case PRIV_CRED_SETRESGID:
1904
1905 /*
1906 * Allow processes to perform system monitoring.
1907 */
1908 case PRIV_SEEOTHERGIDS:
1909 case PRIV_SEEOTHERUIDS:
1910 break;
1911
1912 /*
1913 * Allow access to general process debugging facilities. We
1914 * separately control debugging based on MAC label.
1915 */
1916 case PRIV_DEBUG_DIFFCRED:
1917 case PRIV_DEBUG_SUGID:
1918 case PRIV_DEBUG_UNPRIV:
1919
1920 /*
1921 * Allow manipulating jails.
1922 */
1923 case PRIV_JAIL_ATTACH:
1924
1925 /*
1926 * Allow privilege with respect to the Partition policy, but not the
1927 * Privs policy.
1928 */
1929 case PRIV_MAC_PARTITION:
1930
1931 /*
1932 * Allow privilege with respect to process resource limits and login
1933 * context.
1934 */
1935 case PRIV_PROC_LIMIT:
1936 case PRIV_PROC_SETLOGIN:
1937 case PRIV_PROC_SETRLIMIT:
1938
1939 /*
1940 * Allow System V and POSIX IPC privileges.
1941 */
1942 case PRIV_IPC_READ:
1943 case PRIV_IPC_WRITE:
1944 case PRIV_IPC_ADMIN:
1945 case PRIV_IPC_MSGSIZE:
1946 case PRIV_MQ_ADMIN:
1947
1948 /*
1949 * Allow certain scheduler manipulations -- possibly this should be
1950 * controlled by more fine-grained policy, as potentially low
1951 * integrity processes can deny CPU to higher integrity ones.
1952 */
1953 case PRIV_SCHED_DIFFCRED:
1954 case PRIV_SCHED_SETPRIORITY:
1955 case PRIV_SCHED_RTPRIO:
1956 case PRIV_SCHED_SETPOLICY:
1957 case PRIV_SCHED_SET:
1958 case PRIV_SCHED_SETPARAM:
1959
1960 /*
1961 * More IPC privileges.
1962 */
1963 case PRIV_SEM_WRITE:
1964
1965 /*
1966 * Allow signaling privileges subject to integrity policy.
1967 */
1968 case PRIV_SIGNAL_DIFFCRED:
1969 case PRIV_SIGNAL_SUGID:
1970
1971 /*
1972 * Allow access to only limited sysctls from lower integrity levels;
1973 * piggy-back on the Jail definition.
1974 */
1975 case PRIV_SYSCTL_WRITEJAIL:
1976
1977 /*
1978 * Allow TTY-based privileges, subject to general device access using
1979 * labels on TTY device nodes, but not console privilege.
1980 */
1981 case PRIV_TTY_DRAINWAIT:
1982 case PRIV_TTY_DTRWAIT:
1983 case PRIV_TTY_EXCLUSIVE:
1984 case PRIV_TTY_STI:
1985 case PRIV_TTY_SETA:
1986
1987 /*
1988 * Grant most VFS privileges, as almost all are in practice bounded
1989 * by more specific checks using labels.
1990 */
1991 case PRIV_VFS_READ:
1992 case PRIV_VFS_WRITE:
1993 case PRIV_VFS_ADMIN:
1994 case PRIV_VFS_EXEC:
1995 case PRIV_VFS_LOOKUP:
1996 case PRIV_VFS_CHFLAGS_DEV:
1997 case PRIV_VFS_CHOWN:
1998 case PRIV_VFS_CHROOT:
1999 case PRIV_VFS_RETAINSUGID:
2000 case PRIV_VFS_EXCEEDQUOTA:
2001 case PRIV_VFS_FCHROOT:
2002 case PRIV_VFS_FHOPEN:
2003 case PRIV_VFS_FHSTATFS:
2004 case PRIV_VFS_GENERATION:
2005 case PRIV_VFS_GETFH:
2006 case PRIV_VFS_GETQUOTA:
2007 case PRIV_VFS_LINK:
2008 case PRIV_VFS_MOUNT:
2009 case PRIV_VFS_MOUNT_OWNER:
2010 case PRIV_VFS_MOUNT_PERM:
2011 case PRIV_VFS_MOUNT_SUIDDIR:
2012 case PRIV_VFS_MOUNT_NONUSER:
2013 case PRIV_VFS_SETGID:
2014 case PRIV_VFS_STICKYFILE:
2015 case PRIV_VFS_SYSFLAGS:
2016 case PRIV_VFS_UNMOUNT:
2017
2018 /*
2019 * Allow VM privileges; it would be nice if these were subject to
2020 * resource limits.
2021 */
2022 case PRIV_VM_MADV_PROTECT:
2023 case PRIV_VM_MLOCK:
2024 case PRIV_VM_MUNLOCK:
2025 case PRIV_VM_SWAP_NOQUOTA:
2026 case PRIV_VM_SWAP_NORLIMIT:
2027
2028 /*
2029 * Allow some but not all network privileges. In general, dont allow
2030 * reconfiguring the network stack, just normal use.
2031 */
2032 case PRIV_NETATALK_RESERVEDPORT:
2033 case PRIV_NETINET_RESERVEDPORT:
2034 case PRIV_NETINET_RAW:
2035 case PRIV_NETINET_REUSEPORT:
2036 case PRIV_NETIPX_RESERVEDPORT:
2037 case PRIV_NETIPX_RAW:
2038 break;
2039
2040 /*
2041 * All remaining system privileges are allow only if the process
2042 * holds privilege with respect to the Biba policy.
2043 */
2044 default:
2045 subj = SLOT(cred->cr_label);
2046 error = biba_subject_privileged(subj);
2047 if (error)
2048 return (error);
2049 }
2050 return (0);
2051 }
2052
2053 static int
2054 biba_proc_check_debug(struct ucred *cred, struct proc *p)
2055 {
2056 struct mac_biba *subj, *obj;
2057
2058 if (!biba_enabled)
2059 return (0);
2060
2061 subj = SLOT(cred->cr_label);
2062 obj = SLOT(p->p_ucred->cr_label);
2063
2064 /* XXX: range checks */
2065 if (!biba_dominate_effective(obj, subj))
2066 return (ESRCH);
2067 if (!biba_dominate_effective(subj, obj))
2068 return (EACCES);
2069
2070 return (0);
2071 }
2072
2073 static int
2074 biba_proc_check_sched(struct ucred *cred, struct proc *p)
2075 {
2076 struct mac_biba *subj, *obj;
2077
2078 if (!biba_enabled)
2079 return (0);
2080
2081 subj = SLOT(cred->cr_label);
2082 obj = SLOT(p->p_ucred->cr_label);
2083
2084 /* XXX: range checks */
2085 if (!biba_dominate_effective(obj, subj))
2086 return (ESRCH);
2087 if (!biba_dominate_effective(subj, obj))
2088 return (EACCES);
2089
2090 return (0);
2091 }
2092
2093 static int
2094 biba_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
2095 {
2096 struct mac_biba *subj, *obj;
2097
2098 if (!biba_enabled)
2099 return (0);
2100
2101 subj = SLOT(cred->cr_label);
2102 obj = SLOT(p->p_ucred->cr_label);
2103
2104 /* XXX: range checks */
2105 if (!biba_dominate_effective(obj, subj))
2106 return (ESRCH);
2107 if (!biba_dominate_effective(subj, obj))
2108 return (EACCES);
2109
2110 return (0);
2111 }
2112
2113 static int
2114 biba_socket_check_deliver(struct socket *so, struct label *solabel,
2115 struct mbuf *m, struct label *mlabel)
2116 {
2117 struct mac_biba *p, *s;
2118 int error;
2119
2120 if (!biba_enabled)
2121 return (0);
2122
2123 p = SLOT(mlabel);
2124 s = SLOT(solabel);
2125
2126 SOCK_LOCK(so);
2127 error = biba_equal_effective(p, s) ? 0 : EACCES;
2128 SOCK_UNLOCK(so);
2129 return (error);
2130 }
2131
2132 static int
2133 biba_socket_check_relabel(struct ucred *cred, struct socket *so,
2134 struct label *solabel, struct label *newlabel)
2135 {
2136 struct mac_biba *subj, *obj, *new;
2137 int error;
2138
2139 SOCK_LOCK_ASSERT(so);
2140
2141 new = SLOT(newlabel);
2142 subj = SLOT(cred->cr_label);
2143 obj = SLOT(solabel);
2144
2145 /*
2146 * If there is a Biba label update for the socket, it may be an
2147 * update of effective.
2148 */
2149 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
2150 if (error)
2151 return (error);
2152
2153 /*
2154 * To relabel a socket, the old socket effective must be in the
2155 * subject range.
2156 */
2157 if (!biba_effective_in_range(obj, subj))
2158 return (EPERM);
2159
2160 /*
2161 * If the Biba label is to be changed, authorize as appropriate.
2162 */
2163 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
2164 /*
2165 * To relabel a socket, the new socket effective must be in
2166 * the subject range.
2167 */
2168 if (!biba_effective_in_range(new, subj))
2169 return (EPERM);
2170
2171 /*
2172 * To change the Biba label on the socket to contain EQUAL,
2173 * the subject must have appropriate privilege.
2174 */
2175 if (biba_contains_equal(new)) {
2176 error = biba_subject_privileged(subj);
2177 if (error)
2178 return (error);
2179 }
2180 }
2181
2182 return (0);
2183 }
2184
2185 static int
2186 biba_socket_check_visible(struct ucred *cred, struct socket *so,
2187 struct label *solabel)
2188 {
2189 struct mac_biba *subj, *obj;
2190
2191 if (!biba_enabled)
2192 return (0);
2193
2194 subj = SLOT(cred->cr_label);
2195 obj = SLOT(solabel);
2196
2197 SOCK_LOCK(so);
2198 if (!biba_dominate_effective(obj, subj)) {
2199 SOCK_UNLOCK(so);
2200 return (ENOENT);
2201 }
2202 SOCK_UNLOCK(so);
2203
2204 return (0);
2205 }
2206
2207 static void
2208 biba_socket_create(struct ucred *cred, struct socket *so,
2209 struct label *solabel)
2210 {
2211 struct mac_biba *source, *dest;
2212
2213 source = SLOT(cred->cr_label);
2214 dest = SLOT(solabel);
2215
2216 biba_copy_effective(source, dest);
2217 }
2218
2219 static void
2220 biba_socket_create_mbuf(struct socket *so, struct label *solabel,
2221 struct mbuf *m, struct label *mlabel)
2222 {
2223 struct mac_biba *source, *dest;
2224
2225 source = SLOT(solabel);
2226 dest = SLOT(mlabel);
2227
2228 SOCK_LOCK(so);
2229 biba_copy_effective(source, dest);
2230 SOCK_UNLOCK(so);
2231 }
2232
2233 static void
2234 biba_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2235 struct socket *newso, struct label *newsolabel)
2236 {
2237 struct mac_biba source, *dest;
2238
2239 SOCK_LOCK(oldso);
2240 source = *SLOT(oldsolabel);
2241 SOCK_UNLOCK(oldso);
2242
2243 dest = SLOT(newsolabel);
2244
2245 SOCK_LOCK(newso);
2246 biba_copy_effective(&source, dest);
2247 SOCK_UNLOCK(newso);
2248 }
2249
2250 static void
2251 biba_socket_relabel(struct ucred *cred, struct socket *so,
2252 struct label *solabel, struct label *newlabel)
2253 {
2254 struct mac_biba *source, *dest;
2255
2256 SOCK_LOCK_ASSERT(so);
2257
2258 source = SLOT(newlabel);
2259 dest = SLOT(solabel);
2260
2261 biba_copy(source, dest);
2262 }
2263
2264 static void
2265 biba_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2266 struct socket *so, struct label *sopeerlabel)
2267 {
2268 struct mac_biba *source, *dest;
2269
2270 source = SLOT(mlabel);
2271 dest = SLOT(sopeerlabel);
2272
2273 SOCK_LOCK(so);
2274 biba_copy_effective(source, dest);
2275 SOCK_UNLOCK(so);
2276 }
2277
2278 static void
2279 biba_socketpeer_set_from_socket(struct socket *oldso,
2280 struct label *oldsolabel, struct socket *newso,
2281 struct label *newsopeerlabel)
2282 {
2283 struct mac_biba source, *dest;
2284
2285 SOCK_LOCK(oldso);
2286 source = *SLOT(oldsolabel);
2287 SOCK_UNLOCK(oldso);
2288 dest = SLOT(newsopeerlabel);
2289
2290 SOCK_LOCK(newso);
2291 biba_copy_effective(&source, dest);
2292 SOCK_UNLOCK(newso);
2293 }
2294
2295 static void
2296 biba_syncache_create(struct label *label, struct inpcb *inp)
2297 {
2298 struct mac_biba *source, *dest;
2299
2300 source = SLOT(inp->inp_label);
2301 dest = SLOT(label);
2302 biba_copy_effective(source, dest);
2303 }
2304
2305 static void
2306 biba_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2307 struct label *mlabel)
2308 {
2309 struct mac_biba *source, *dest;
2310
2311 source = SLOT(sc_label);
2312 dest = SLOT(mlabel);
2313 biba_copy_effective(source, dest);
2314 }
2315
2316 static int
2317 biba_system_check_acct(struct ucred *cred, struct vnode *vp,
2318 struct label *vplabel)
2319 {
2320 struct mac_biba *subj, *obj;
2321 int error;
2322
2323 if (!biba_enabled)
2324 return (0);
2325
2326 subj = SLOT(cred->cr_label);
2327
2328 error = biba_subject_privileged(subj);
2329 if (error)
2330 return (error);
2331
2332 if (vplabel == NULL)
2333 return (0);
2334
2335 obj = SLOT(vplabel);
2336 if (!biba_high_effective(obj))
2337 return (EACCES);
2338
2339 return (0);
2340 }
2341
2342 static int
2343 biba_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2344 struct label *vplabel)
2345 {
2346 struct mac_biba *subj, *obj;
2347 int error;
2348
2349 if (!biba_enabled)
2350 return (0);
2351
2352 subj = SLOT(cred->cr_label);
2353
2354 error = biba_subject_privileged(subj);
2355 if (error)
2356 return (error);
2357
2358 if (vplabel == NULL)
2359 return (0);
2360
2361 obj = SLOT(vplabel);
2362 if (!biba_high_effective(obj))
2363 return (EACCES);
2364
2365 return (0);
2366 }
2367
2368 static int
2369 biba_system_check_auditon(struct ucred *cred, int cmd)
2370 {
2371 struct mac_biba *subj;
2372 int error;
2373
2374 if (!biba_enabled)
2375 return (0);
2376
2377 subj = SLOT(cred->cr_label);
2378
2379 error = biba_subject_privileged(subj);
2380 if (error)
2381 return (error);
2382
2383 return (0);
2384 }
2385
2386 static int
2387 biba_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2388 struct label *label)
2389 {
2390 struct mac_biba *subj;
2391 int error;
2392
2393 if (!biba_enabled)
2394 return (0);
2395
2396 subj = SLOT(cred->cr_label);
2397
2398 error = biba_subject_privileged(subj);
2399 if (error)
2400 return (error);
2401
2402 return (0);
2403 }
2404
2405 static int
2406 biba_system_check_swapon(struct ucred *cred, struct vnode *vp,
2407 struct label *vplabel)
2408 {
2409 struct mac_biba *subj, *obj;
2410 int error;
2411
2412 if (!biba_enabled)
2413 return (0);
2414
2415 subj = SLOT(cred->cr_label);
2416 obj = SLOT(vplabel);
2417
2418 error = biba_subject_privileged(subj);
2419 if (error)
2420 return (error);
2421
2422 if (!biba_high_effective(obj))
2423 return (EACCES);
2424
2425 return (0);
2426 }
2427
2428 static int
2429 biba_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2430 void *arg1, int arg2, struct sysctl_req *req)
2431 {
2432 struct mac_biba *subj;
2433 int error;
2434
2435 if (!biba_enabled)
2436 return (0);
2437
2438 subj = SLOT(cred->cr_label);
2439
2440 /*
2441 * Treat sysctl variables without CTLFLAG_ANYBODY flag as biba/high,
2442 * but also require privilege to change them.
2443 */
2444 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2445 if (!biba_subject_dominate_high(subj))
2446 return (EACCES);
2447
2448 error = biba_subject_privileged(subj);
2449 if (error)
2450 return (error);
2451 }
2452
2453 return (0);
2454 }
2455
2456 static void
2457 biba_sysvmsg_cleanup(struct label *msglabel)
2458 {
2459
2460 bzero(SLOT(msglabel), sizeof(struct mac_biba));
2461 }
2462
2463 static void
2464 biba_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2465 struct label *msqlabel, struct msg *msgptr, struct label *msglabel)
2466 {
2467 struct mac_biba *source, *dest;
2468
2469 /* Ignore the msgq label */
2470 source = SLOT(cred->cr_label);
2471 dest = SLOT(msglabel);
2472
2473 biba_copy_effective(source, dest);
2474 }
2475
2476 static int
2477 biba_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr,
2478 struct label *msglabel)
2479 {
2480 struct mac_biba *subj, *obj;
2481
2482 if (!biba_enabled)
2483 return (0);
2484
2485 subj = SLOT(cred->cr_label);
2486 obj = SLOT(msglabel);
2487
2488 if (!biba_dominate_effective(obj, subj))
2489 return (EACCES);
2490
2491 return (0);
2492 }
2493
2494 static int
2495 biba_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr,
2496 struct label *msglabel)
2497 {
2498 struct mac_biba *subj, *obj;
2499
2500 if (!biba_enabled)
2501 return (0);
2502
2503 subj = SLOT(cred->cr_label);
2504 obj = SLOT(msglabel);
2505
2506 if (!biba_dominate_effective(subj, obj))
2507 return (EACCES);
2508
2509 return (0);
2510 }
2511
2512 static int
2513 biba_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr,
2514 struct label *msqklabel)
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(msqklabel);
2523
2524 if (!biba_dominate_effective(obj, subj))
2525 return (EACCES);
2526
2527 return (0);
2528 }
2529
2530 static int
2531 biba_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr,
2532 struct label *msqklabel)
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(msqklabel);
2541
2542 if (!biba_dominate_effective(subj, obj))
2543 return (EACCES);
2544
2545 return (0);
2546 }
2547
2548 static int
2549 biba_sysvmsq_check_msqrcv(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_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
2568 struct label *msqklabel, int cmd)
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 switch(cmd) {
2579 case IPC_RMID:
2580 case IPC_SET:
2581 if (!biba_dominate_effective(subj, obj))
2582 return (EACCES);
2583 break;
2584
2585 case IPC_STAT:
2586 if (!biba_dominate_effective(obj, subj))
2587 return (EACCES);
2588 break;
2589
2590 default:
2591 return (EACCES);
2592 }
2593
2594 return (0);
2595 }
2596
2597 static void
2598 biba_sysvmsq_cleanup(struct label *msqlabel)
2599 {
2600
2601 bzero(SLOT(msqlabel), sizeof(struct mac_biba));
2602 }
2603
2604 static void
2605 biba_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2606 struct label *msqlabel)
2607 {
2608 struct mac_biba *source, *dest;
2609
2610 source = SLOT(cred->cr_label);
2611 dest = SLOT(msqlabel);
2612
2613 biba_copy_effective(source, dest);
2614 }
2615
2616 static int
2617 biba_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr,
2618 struct label *semaklabel, int cmd)
2619 {
2620 struct mac_biba *subj, *obj;
2621
2622 if (!biba_enabled)
2623 return (0);
2624
2625 subj = SLOT(cred->cr_label);
2626 obj = SLOT(semaklabel);
2627
2628 switch(cmd) {
2629 case IPC_RMID:
2630 case IPC_SET:
2631 case SETVAL:
2632 case SETALL:
2633 if (!biba_dominate_effective(subj, obj))
2634 return (EACCES);
2635 break;
2636
2637 case IPC_STAT:
2638 case GETVAL:
2639 case GETPID:
2640 case GETNCNT:
2641 case GETZCNT:
2642 case GETALL:
2643 if (!biba_dominate_effective(obj, subj))
2644 return (EACCES);
2645 break;
2646
2647 default:
2648 return (EACCES);
2649 }
2650
2651 return (0);
2652 }
2653
2654 static int
2655 biba_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr,
2656 struct label *semaklabel)
2657 {
2658 struct mac_biba *subj, *obj;
2659
2660 if (!biba_enabled)
2661 return (0);
2662
2663 subj = SLOT(cred->cr_label);
2664 obj = SLOT(semaklabel);
2665
2666 if (!biba_dominate_effective(obj, subj))
2667 return (EACCES);
2668
2669 return (0);
2670 }
2671
2672 static int
2673 biba_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr,
2674 struct label *semaklabel, size_t accesstype)
2675 {
2676 struct mac_biba *subj, *obj;
2677
2678 if (!biba_enabled)
2679 return (0);
2680
2681 subj = SLOT(cred->cr_label);
2682 obj = SLOT(semaklabel);
2683
2684 if (accesstype & SEM_R)
2685 if (!biba_dominate_effective(obj, subj))
2686 return (EACCES);
2687
2688 if (accesstype & SEM_A)
2689 if (!biba_dominate_effective(subj, obj))
2690 return (EACCES);
2691
2692 return (0);
2693 }
2694
2695 static void
2696 biba_sysvsem_cleanup(struct label *semalabel)
2697 {
2698
2699 bzero(SLOT(semalabel), sizeof(struct mac_biba));
2700 }
2701
2702 static void
2703 biba_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr,
2704 struct label *semalabel)
2705 {
2706 struct mac_biba *source, *dest;
2707
2708 source = SLOT(cred->cr_label);
2709 dest = SLOT(semalabel);
2710
2711 biba_copy_effective(source, dest);
2712 }
2713
2714 static int
2715 biba_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
2716 struct label *shmseglabel, int shmflg)
2717 {
2718 struct mac_biba *subj, *obj;
2719
2720 if (!biba_enabled)
2721 return (0);
2722
2723 subj = SLOT(cred->cr_label);
2724 obj = SLOT(shmseglabel);
2725
2726 if (!biba_dominate_effective(obj, subj))
2727 return (EACCES);
2728 if ((shmflg & SHM_RDONLY) == 0) {
2729 if (!biba_dominate_effective(subj, obj))
2730 return (EACCES);
2731 }
2732
2733 return (0);
2734 }
2735
2736 static int
2737 biba_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
2738 struct label *shmseglabel, int cmd)
2739 {
2740 struct mac_biba *subj, *obj;
2741
2742 if (!biba_enabled)
2743 return (0);
2744
2745 subj = SLOT(cred->cr_label);
2746 obj = SLOT(shmseglabel);
2747
2748 switch(cmd) {
2749 case IPC_RMID:
2750 case IPC_SET:
2751 if (!biba_dominate_effective(subj, obj))
2752 return (EACCES);
2753 break;
2754
2755 case IPC_STAT:
2756 case SHM_STAT:
2757 if (!biba_dominate_effective(obj, subj))
2758 return (EACCES);
2759 break;
2760
2761 default:
2762 return (EACCES);
2763 }
2764
2765 return (0);
2766 }
2767
2768 static int
2769 biba_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
2770 struct label *shmseglabel, int shmflg)
2771 {
2772 struct mac_biba *subj, *obj;
2773
2774 if (!biba_enabled)
2775 return (0);
2776
2777 subj = SLOT(cred->cr_label);
2778 obj = SLOT(shmseglabel);
2779
2780 if (!biba_dominate_effective(obj, subj))
2781 return (EACCES);
2782
2783 return (0);
2784 }
2785
2786 static void
2787 biba_sysvshm_cleanup(struct label *shmlabel)
2788 {
2789
2790 bzero(SLOT(shmlabel), sizeof(struct mac_biba));
2791 }
2792
2793 static void
2794 biba_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr,
2795 struct label *shmlabel)
2796 {
2797 struct mac_biba *source, *dest;
2798
2799 source = SLOT(cred->cr_label);
2800 dest = SLOT(shmlabel);
2801
2802 biba_copy_effective(source, dest);
2803 }
2804
2805 static int
2806 biba_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2807 struct vnode *vp, struct label *vplabel)
2808 {
2809 struct mac_biba mb_temp, *source, *dest;
2810 int buflen, error;
2811
2812 source = SLOT(mplabel);
2813 dest = SLOT(vplabel);
2814
2815 buflen = sizeof(mb_temp);
2816 bzero(&mb_temp, buflen);
2817
2818 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
2819 MAC_BIBA_EXTATTR_NAME, &buflen, (char *) &mb_temp, curthread);
2820 if (error == ENOATTR || error == EOPNOTSUPP) {
2821 /* Fall back to the mntlabel. */
2822 biba_copy_effective(source, dest);
2823 return (0);
2824 } else if (error)
2825 return (error);
2826
2827 if (buflen != sizeof(mb_temp)) {
2828 printf("biba_vnode_associate_extattr: bad size %d\n",
2829 buflen);
2830 return (EPERM);
2831 }
2832 if (biba_valid(&mb_temp) != 0) {
2833 printf("biba_vnode_associate_extattr: invalid\n");
2834 return (EPERM);
2835 }
2836 if ((mb_temp.mb_flags & MAC_BIBA_FLAGS_BOTH) !=
2837 MAC_BIBA_FLAG_EFFECTIVE) {
2838 printf("biba_vnode_associate_extattr: not effective\n");
2839 return (EPERM);
2840 }
2841
2842 biba_copy_effective(&mb_temp, dest);
2843 return (0);
2844 }
2845
2846 static void
2847 biba_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2848 struct vnode *vp, struct label *vplabel)
2849 {
2850 struct mac_biba *source, *dest;
2851
2852 source = SLOT(mplabel);
2853 dest = SLOT(vplabel);
2854
2855 biba_copy_effective(source, dest);
2856 }
2857
2858 static int
2859 biba_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
2860 struct label *dvplabel)
2861 {
2862 struct mac_biba *subj, *obj;
2863
2864 if (!biba_enabled)
2865 return (0);
2866
2867 subj = SLOT(cred->cr_label);
2868 obj = SLOT(dvplabel);
2869
2870 if (!biba_dominate_effective(obj, subj))
2871 return (EACCES);
2872
2873 return (0);
2874 }
2875
2876 static int
2877 biba_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
2878 struct label *dvplabel)
2879 {
2880 struct mac_biba *subj, *obj;
2881
2882 if (!biba_enabled)
2883 return (0);
2884
2885 subj = SLOT(cred->cr_label);
2886 obj = SLOT(dvplabel);
2887
2888 if (!biba_dominate_effective(obj, subj))
2889 return (EACCES);
2890
2891 return (0);
2892 }
2893
2894 static int
2895 biba_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2896 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
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(subj, obj))
2907 return (EACCES);
2908
2909 return (0);
2910 }
2911
2912 static int
2913 biba_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2914 struct label *vplabel, acl_type_t type)
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(vplabel);
2923
2924 if (!biba_dominate_effective(subj, obj))
2925 return (EACCES);
2926
2927 return (0);
2928 }
2929
2930 static int
2931 biba_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
2932 struct label *vplabel, int attrnamespace, const char *name)
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(vplabel);
2941
2942 if (!biba_dominate_effective(subj, obj))
2943 return (EACCES);
2944
2945 return (0);
2946 }
2947
2948 static int
2949 biba_vnode_check_exec(struct ucred *cred, struct vnode *vp,
2950 struct label *vplabel, struct image_params *imgp,
2951 struct label *execlabel)
2952 {
2953 struct mac_biba *subj, *obj, *exec;
2954 int error;
2955
2956 if (execlabel != NULL) {
2957 /*
2958 * We currently don't permit labels to be changed at
2959 * exec-time as part of Biba, so disallow non-NULL Biba label
2960 * elements in the execlabel.
2961 */
2962 exec = SLOT(execlabel);
2963 error = biba_atmostflags(exec, 0);
2964 if (error)
2965 return (error);
2966 }
2967
2968 if (!biba_enabled)
2969 return (0);
2970
2971 subj = SLOT(cred->cr_label);
2972 obj = SLOT(vplabel);
2973
2974 if (!biba_dominate_effective(obj, subj))
2975 return (EACCES);
2976
2977 return (0);
2978 }
2979
2980 static int
2981 biba_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
2982 struct label *vplabel, acl_type_t type)
2983 {
2984 struct mac_biba *subj, *obj;
2985
2986 if (!biba_enabled)
2987 return (0);
2988
2989 subj = SLOT(cred->cr_label);
2990 obj = SLOT(vplabel);
2991
2992 if (!biba_dominate_effective(obj, subj))
2993 return (EACCES);
2994
2995 return (0);
2996 }
2997
2998 static int
2999 biba_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
3000 struct label *vplabel, int attrnamespace, const char *name)
3001 {
3002 struct mac_biba *subj, *obj;
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_link(struct ucred *cred, struct vnode *dvp,
3018 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3019 struct componentname *cnp)
3020 {
3021 struct mac_biba *subj, *obj;
3022
3023 if (!biba_enabled)
3024 return (0);
3025
3026 subj = SLOT(cred->cr_label);
3027 obj = SLOT(dvplabel);
3028
3029 if (!biba_dominate_effective(subj, obj))
3030 return (EACCES);
3031
3032 obj = SLOT(vplabel);
3033
3034 if (!biba_dominate_effective(subj, obj))
3035 return (EACCES);
3036
3037 return (0);
3038 }
3039
3040 static int
3041 biba_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
3042 struct label *vplabel, int attrnamespace)
3043 {
3044 struct mac_biba *subj, *obj;
3045
3046 if (!biba_enabled)
3047 return (0);
3048
3049 subj = SLOT(cred->cr_label);
3050 obj = SLOT(vplabel);
3051
3052 if (!biba_dominate_effective(obj, subj))
3053 return (EACCES);
3054
3055 return (0);
3056 }
3057
3058 static int
3059 biba_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
3060 struct label *dvplabel, struct componentname *cnp)
3061 {
3062 struct mac_biba *subj, *obj;
3063
3064 if (!biba_enabled)
3065 return (0);
3066
3067 subj = SLOT(cred->cr_label);
3068 obj = SLOT(dvplabel);
3069
3070 if (!biba_dominate_effective(obj, subj))
3071 return (EACCES);
3072
3073 return (0);
3074 }
3075
3076 static int
3077 biba_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
3078 struct label *vplabel, int prot, int flags)
3079 {
3080 struct mac_biba *subj, *obj;
3081
3082 /*
3083 * Rely on the use of open()-time protections to handle
3084 * non-revocation cases.
3085 */
3086 if (!biba_enabled || !revocation_enabled)
3087 return (0);
3088
3089 subj = SLOT(cred->cr_label);
3090 obj = SLOT(vplabel);
3091
3092 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
3093 if (!biba_dominate_effective(obj, subj))
3094 return (EACCES);
3095 }
3096 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
3097 if (!biba_dominate_effective(subj, obj))
3098 return (EACCES);
3099 }
3100
3101 return (0);
3102 }
3103
3104 static int
3105 biba_vnode_check_open(struct ucred *cred, struct vnode *vp,
3106 struct label *vplabel, accmode_t accmode)
3107 {
3108 struct mac_biba *subj, *obj;
3109
3110 if (!biba_enabled)
3111 return (0);
3112
3113 subj = SLOT(cred->cr_label);
3114 obj = SLOT(vplabel);
3115
3116 /* XXX privilege override for admin? */
3117 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
3118 if (!biba_dominate_effective(obj, subj))
3119 return (EACCES);
3120 }
3121 if (accmode & VMODIFY_PERMS) {
3122 if (!biba_dominate_effective(subj, obj))
3123 return (EACCES);
3124 }
3125
3126 return (0);
3127 }
3128
3129 static int
3130 biba_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
3131 struct vnode *vp, struct label *vplabel)
3132 {
3133 struct mac_biba *subj, *obj;
3134
3135 if (!biba_enabled || !revocation_enabled)
3136 return (0);
3137
3138 subj = SLOT(active_cred->cr_label);
3139 obj = SLOT(vplabel);
3140
3141 if (!biba_dominate_effective(obj, subj))
3142 return (EACCES);
3143
3144 return (0);
3145 }
3146
3147 static int
3148 biba_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
3149 struct vnode *vp, struct label *vplabel)
3150 {
3151 struct mac_biba *subj, *obj;
3152
3153 if (!biba_enabled || !revocation_enabled)
3154 return (0);
3155
3156 subj = SLOT(active_cred->cr_label);
3157 obj = SLOT(vplabel);
3158
3159 if (!biba_dominate_effective(obj, subj))
3160 return (EACCES);
3161
3162 return (0);
3163 }
3164
3165 static int
3166 biba_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
3167 struct label *dvplabel)
3168 {
3169 struct mac_biba *subj, *obj;
3170
3171 if (!biba_enabled)
3172 return (0);
3173
3174 subj = SLOT(cred->cr_label);
3175 obj = SLOT(dvplabel);
3176
3177 if (!biba_dominate_effective(obj, subj))
3178 return (EACCES);
3179
3180 return (0);
3181 }
3182
3183 static int
3184 biba_vnode_check_readlink(struct ucred *cred, struct vnode *vp,
3185 struct label *vplabel)
3186 {
3187 struct mac_biba *subj, *obj;
3188
3189 if (!biba_enabled)
3190 return (0);
3191
3192 subj = SLOT(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_relabel(struct ucred *cred, struct vnode *vp,
3203 struct label *vplabel, struct label *newlabel)
3204 {
3205 struct mac_biba *old, *new, *subj;
3206 int error;
3207
3208 old = SLOT(vplabel);
3209 new = SLOT(newlabel);
3210 subj = SLOT(cred->cr_label);
3211
3212 /*
3213 * If there is a Biba label update for the vnode, it must be a
3214 * effective label.
3215 */
3216 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
3217 if (error)
3218 return (error);
3219
3220 /*
3221 * To perform a relabel of the vnode (Biba label or not), Biba must
3222 * authorize the relabel.
3223 */
3224 if (!biba_effective_in_range(old, subj))
3225 return (EPERM);
3226
3227 /*
3228 * If the Biba label is to be changed, authorize as appropriate.
3229 */
3230 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
3231 /*
3232 * To change the Biba label on a vnode, the new vnode label
3233 * must be in the subject range.
3234 */
3235 if (!biba_effective_in_range(new, subj))
3236 return (EPERM);
3237
3238 /*
3239 * To change the Biba label on the vnode to be EQUAL, the
3240 * subject must have appropriate privilege.
3241 */
3242 if (biba_contains_equal(new)) {
3243 error = biba_subject_privileged(subj);
3244 if (error)
3245 return (error);
3246 }
3247 }
3248
3249 return (0);
3250 }
3251
3252 static int
3253 biba_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
3254 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3255 struct componentname *cnp)
3256 {
3257 struct mac_biba *subj, *obj;
3258
3259 if (!biba_enabled)
3260 return (0);
3261
3262 subj = SLOT(cred->cr_label);
3263 obj = SLOT(dvplabel);
3264
3265 if (!biba_dominate_effective(subj, obj))
3266 return (EACCES);
3267
3268 obj = SLOT(vplabel);
3269
3270 if (!biba_dominate_effective(subj, obj))
3271 return (EACCES);
3272
3273 return (0);
3274 }
3275
3276 static int
3277 biba_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
3278 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3279 int samedir, struct componentname *cnp)
3280 {
3281 struct mac_biba *subj, *obj;
3282
3283 if (!biba_enabled)
3284 return (0);
3285
3286 subj = SLOT(cred->cr_label);
3287 obj = SLOT(dvplabel);
3288
3289 if (!biba_dominate_effective(subj, obj))
3290 return (EACCES);
3291
3292 if (vp != NULL) {
3293 obj = SLOT(vplabel);
3294
3295 if (!biba_dominate_effective(subj, obj))
3296 return (EACCES);
3297 }
3298
3299 return (0);
3300 }
3301
3302 static int
3303 biba_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
3304 struct label *vplabel)
3305 {
3306 struct mac_biba *subj, *obj;
3307
3308 if (!biba_enabled)
3309 return (0);
3310
3311 subj = SLOT(cred->cr_label);
3312 obj = SLOT(vplabel);
3313
3314 if (!biba_dominate_effective(subj, obj))
3315 return (EACCES);
3316
3317 return (0);
3318 }
3319
3320 static int
3321 biba_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
3322 struct label *vplabel, acl_type_t type, struct acl *acl)
3323 {
3324 struct mac_biba *subj, *obj;
3325
3326 if (!biba_enabled)
3327 return (0);
3328
3329 subj = SLOT(cred->cr_label);
3330 obj = SLOT(vplabel);
3331
3332 if (!biba_dominate_effective(subj, obj))
3333 return (EACCES);
3334
3335 return (0);
3336 }
3337
3338 static int
3339 biba_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
3340 struct label *vplabel, int attrnamespace, const char *name)
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 /* XXX: protect the MAC EA in a special way? */
3354
3355 return (0);
3356 }
3357
3358 static int
3359 biba_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
3360 struct label *vplabel, u_long flags)
3361 {
3362 struct mac_biba *subj, *obj;
3363
3364 if (!biba_enabled)
3365 return (0);
3366
3367 subj = SLOT(cred->cr_label);
3368 obj = SLOT(vplabel);
3369
3370 if (!biba_dominate_effective(subj, obj))
3371 return (EACCES);
3372
3373 return (0);
3374 }
3375
3376 static int
3377 biba_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
3378 struct label *vplabel, mode_t mode)
3379 {
3380 struct mac_biba *subj, *obj;
3381
3382 if (!biba_enabled)
3383 return (0);
3384
3385 subj = SLOT(cred->cr_label);
3386 obj = SLOT(vplabel);
3387
3388 if (!biba_dominate_effective(subj, obj))
3389 return (EACCES);
3390
3391 return (0);
3392 }
3393
3394 static int
3395 biba_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
3396 struct label *vplabel, uid_t uid, gid_t gid)
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_setutimes(struct ucred *cred, struct vnode *vp,
3414 struct label *vplabel, struct timespec atime, struct timespec mtime)
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_stat(struct ucred *active_cred, struct ucred *file_cred,
3432 struct vnode *vp, struct label *vplabel)
3433 {
3434 struct mac_biba *subj, *obj;
3435
3436 if (!biba_enabled)
3437 return (0);
3438
3439 subj = SLOT(active_cred->cr_label);
3440 obj = SLOT(vplabel);
3441
3442 if (!biba_dominate_effective(obj, subj))
3443 return (EACCES);
3444
3445 return (0);
3446 }
3447
3448 static int
3449 biba_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
3450 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3451 struct componentname *cnp)
3452 {
3453 struct mac_biba *subj, *obj;
3454
3455 if (!biba_enabled)
3456 return (0);
3457
3458 subj = SLOT(cred->cr_label);
3459 obj = SLOT(dvplabel);
3460
3461 if (!biba_dominate_effective(subj, obj))
3462 return (EACCES);
3463
3464 obj = SLOT(vplabel);
3465
3466 if (!biba_dominate_effective(subj, obj))
3467 return (EACCES);
3468
3469 return (0);
3470 }
3471
3472 static int
3473 biba_vnode_check_write(struct ucred *active_cred,
3474 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
3475 {
3476 struct mac_biba *subj, *obj;
3477
3478 if (!biba_enabled || !revocation_enabled)
3479 return (0);
3480
3481 subj = SLOT(active_cred->cr_label);
3482 obj = SLOT(vplabel);
3483
3484 if (!biba_dominate_effective(subj, obj))
3485 return (EACCES);
3486
3487 return (0);
3488 }
3489
3490 static int
3491 biba_vnode_create_extattr(struct ucred *cred, struct mount *mp,
3492 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
3493 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
3494 {
3495 struct mac_biba *source, *dest, mb_temp;
3496 size_t buflen;
3497 int error;
3498
3499 buflen = sizeof(mb_temp);
3500 bzero(&mb_temp, buflen);
3501
3502 source = SLOT(cred->cr_label);
3503 dest = SLOT(vplabel);
3504 biba_copy_effective(source, &mb_temp);
3505
3506 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3507 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3508 if (error == 0)
3509 biba_copy_effective(source, dest);
3510 return (error);
3511 }
3512
3513 static void
3514 biba_vnode_relabel(struct ucred *cred, struct vnode *vp,
3515 struct label *vplabel, struct label *newlabel)
3516 {
3517 struct mac_biba *source, *dest;
3518
3519 source = SLOT(newlabel);
3520 dest = SLOT(vplabel);
3521
3522 biba_copy(source, dest);
3523 }
3524
3525 static int
3526 biba_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
3527 struct label *vplabel, struct label *intlabel)
3528 {
3529 struct mac_biba *source, mb_temp;
3530 size_t buflen;
3531 int error;
3532
3533 buflen = sizeof(mb_temp);
3534 bzero(&mb_temp, buflen);
3535
3536 source = SLOT(intlabel);
3537 if ((source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) == 0)
3538 return (0);
3539
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 return (error);
3545 }
3546
3547 static struct mac_policy_ops mac_biba_ops =
3548 {
3549 .mpo_init = biba_init,
3550
3551 .mpo_bpfdesc_check_receive = biba_bpfdesc_check_receive,
3552 .mpo_bpfdesc_create = biba_bpfdesc_create,
3553 .mpo_bpfdesc_create_mbuf = biba_bpfdesc_create_mbuf,
3554 .mpo_bpfdesc_destroy_label = biba_destroy_label,
3555 .mpo_bpfdesc_init_label = biba_init_label,
3556
3557 .mpo_cred_associate_nfsd = biba_cred_associate_nfsd,
3558 .mpo_cred_check_relabel = biba_cred_check_relabel,
3559 .mpo_cred_check_visible = biba_cred_check_visible,
3560 .mpo_cred_copy_label = biba_copy_label,
3561 .mpo_cred_create_init = biba_cred_create_init,
3562 .mpo_cred_create_swapper = biba_cred_create_swapper,
3563 .mpo_cred_destroy_label = biba_destroy_label,
3564 .mpo_cred_externalize_label = biba_externalize_label,
3565 .mpo_cred_init_label = biba_init_label,
3566 .mpo_cred_internalize_label = biba_internalize_label,
3567 .mpo_cred_relabel = biba_cred_relabel,
3568
3569 .mpo_devfs_create_device = biba_devfs_create_device,
3570 .mpo_devfs_create_directory = biba_devfs_create_directory,
3571 .mpo_devfs_create_symlink = biba_devfs_create_symlink,
3572 .mpo_devfs_destroy_label = biba_destroy_label,
3573 .mpo_devfs_init_label = biba_init_label,
3574 .mpo_devfs_update = biba_devfs_update,
3575 .mpo_devfs_vnode_associate = biba_devfs_vnode_associate,
3576
3577 .mpo_ifnet_check_relabel = biba_ifnet_check_relabel,
3578 .mpo_ifnet_check_transmit = biba_ifnet_check_transmit,
3579 .mpo_ifnet_copy_label = biba_copy_label,
3580 .mpo_ifnet_create = biba_ifnet_create,
3581 .mpo_ifnet_create_mbuf = biba_ifnet_create_mbuf,
3582 .mpo_ifnet_destroy_label = biba_destroy_label,
3583 .mpo_ifnet_externalize_label = biba_externalize_label,
3584 .mpo_ifnet_init_label = biba_init_label,
3585 .mpo_ifnet_internalize_label = biba_internalize_label,
3586 .mpo_ifnet_relabel = biba_ifnet_relabel,
3587
3588 .mpo_inpcb_check_deliver = biba_inpcb_check_deliver,
3589 .mpo_inpcb_check_visible = biba_inpcb_check_visible,
3590 .mpo_inpcb_create = biba_inpcb_create,
3591 .mpo_inpcb_create_mbuf = biba_inpcb_create_mbuf,
3592 .mpo_inpcb_destroy_label = biba_destroy_label,
3593 .mpo_inpcb_init_label = biba_init_label_waitcheck,
3594 .mpo_inpcb_sosetlabel = biba_inpcb_sosetlabel,
3595
3596 .mpo_ip6q_create = biba_ip6q_create,
3597 .mpo_ip6q_destroy_label = biba_destroy_label,
3598 .mpo_ip6q_init_label = biba_init_label_waitcheck,
3599 .mpo_ip6q_match = biba_ip6q_match,
3600 .mpo_ip6q_reassemble = biba_ip6q_reassemble,
3601 .mpo_ip6q_update = biba_ip6q_update,
3602
3603 .mpo_ipq_create = biba_ipq_create,
3604 .mpo_ipq_destroy_label = biba_destroy_label,
3605 .mpo_ipq_init_label = biba_init_label_waitcheck,
3606 .mpo_ipq_match = biba_ipq_match,
3607 .mpo_ipq_reassemble = biba_ipq_reassemble,
3608 .mpo_ipq_update = biba_ipq_update,
3609
3610 .mpo_kld_check_load = biba_kld_check_load,
3611
3612 .mpo_mbuf_copy_label = biba_copy_label,
3613 .mpo_mbuf_destroy_label = biba_destroy_label,
3614 .mpo_mbuf_init_label = biba_init_label_waitcheck,
3615
3616 .mpo_mount_check_stat = biba_mount_check_stat,
3617 .mpo_mount_create = biba_mount_create,
3618 .mpo_mount_destroy_label = biba_destroy_label,
3619 .mpo_mount_init_label = biba_init_label,
3620
3621 .mpo_netatalk_aarp_send = biba_netatalk_aarp_send,
3622
3623 .mpo_netinet_arp_send = biba_netinet_arp_send,
3624 .mpo_netinet_firewall_reply = biba_netinet_firewall_reply,
3625 .mpo_netinet_firewall_send = biba_netinet_firewall_send,
3626 .mpo_netinet_fragment = biba_netinet_fragment,
3627 .mpo_netinet_icmp_reply = biba_netinet_icmp_reply,
3628 .mpo_netinet_igmp_send = biba_netinet_igmp_send,
3629
3630 .mpo_netinet6_nd6_send = biba_netinet6_nd6_send,
3631
3632 .mpo_pipe_check_ioctl = biba_pipe_check_ioctl,
3633 .mpo_pipe_check_poll = biba_pipe_check_poll,
3634 .mpo_pipe_check_read = biba_pipe_check_read,
3635 .mpo_pipe_check_relabel = biba_pipe_check_relabel,
3636 .mpo_pipe_check_stat = biba_pipe_check_stat,
3637 .mpo_pipe_check_write = biba_pipe_check_write,
3638 .mpo_pipe_copy_label = biba_copy_label,
3639 .mpo_pipe_create = biba_pipe_create,
3640 .mpo_pipe_destroy_label = biba_destroy_label,
3641 .mpo_pipe_externalize_label = biba_externalize_label,
3642 .mpo_pipe_init_label = biba_init_label,
3643 .mpo_pipe_internalize_label = biba_internalize_label,
3644 .mpo_pipe_relabel = biba_pipe_relabel,
3645
3646 .mpo_posixsem_check_getvalue = biba_posixsem_check_rdonly,
3647 .mpo_posixsem_check_open = biba_posixsem_check_openunlink,
3648 .mpo_posixsem_check_post = biba_posixsem_check_write,
3649 .mpo_posixsem_check_setmode = biba_posixsem_check_setmode,
3650 .mpo_posixsem_check_setowner = biba_posixsem_check_setowner,
3651 .mpo_posixsem_check_stat = biba_posixsem_check_rdonly,
3652 .mpo_posixsem_check_unlink = biba_posixsem_check_openunlink,
3653 .mpo_posixsem_check_wait = biba_posixsem_check_write,
3654 .mpo_posixsem_create = biba_posixsem_create,
3655 .mpo_posixsem_destroy_label = biba_destroy_label,
3656 .mpo_posixsem_init_label = biba_init_label,
3657
3658 .mpo_posixshm_check_mmap = biba_posixshm_check_mmap,
3659 .mpo_posixshm_check_open = biba_posixshm_check_open,
3660 .mpo_posixshm_check_setmode = biba_posixshm_check_setmode,
3661 .mpo_posixshm_check_setowner = biba_posixshm_check_setowner,
3662 .mpo_posixshm_check_stat = biba_posixshm_check_stat,
3663 .mpo_posixshm_check_truncate = biba_posixshm_check_truncate,
3664 .mpo_posixshm_check_unlink = biba_posixshm_check_unlink,
3665 .mpo_posixshm_create = biba_posixshm_create,
3666 .mpo_posixshm_destroy_label = biba_destroy_label,
3667 .mpo_posixshm_init_label = biba_init_label,
3668
3669 .mpo_priv_check = biba_priv_check,
3670
3671 .mpo_proc_check_debug = biba_proc_check_debug,
3672 .mpo_proc_check_sched = biba_proc_check_sched,
3673 .mpo_proc_check_signal = biba_proc_check_signal,
3674
3675 .mpo_socket_check_deliver = biba_socket_check_deliver,
3676 .mpo_socket_check_relabel = biba_socket_check_relabel,
3677 .mpo_socket_check_visible = biba_socket_check_visible,
3678 .mpo_socket_copy_label = biba_copy_label,
3679 .mpo_socket_create = biba_socket_create,
3680 .mpo_socket_create_mbuf = biba_socket_create_mbuf,
3681 .mpo_socket_destroy_label = biba_destroy_label,
3682 .mpo_socket_externalize_label = biba_externalize_label,
3683 .mpo_socket_init_label = biba_init_label_waitcheck,
3684 .mpo_socket_internalize_label = biba_internalize_label,
3685 .mpo_socket_newconn = biba_socket_newconn,
3686 .mpo_socket_relabel = biba_socket_relabel,
3687
3688 .mpo_socketpeer_destroy_label = biba_destroy_label,
3689 .mpo_socketpeer_externalize_label = biba_externalize_label,
3690 .mpo_socketpeer_init_label = biba_init_label_waitcheck,
3691 .mpo_socketpeer_set_from_mbuf = biba_socketpeer_set_from_mbuf,
3692 .mpo_socketpeer_set_from_socket = biba_socketpeer_set_from_socket,
3693
3694 .mpo_syncache_create = biba_syncache_create,
3695 .mpo_syncache_create_mbuf = biba_syncache_create_mbuf,
3696 .mpo_syncache_destroy_label = biba_destroy_label,
3697 .mpo_syncache_init_label = biba_init_label_waitcheck,
3698
3699 .mpo_system_check_acct = biba_system_check_acct,
3700 .mpo_system_check_auditctl = biba_system_check_auditctl,
3701 .mpo_system_check_auditon = biba_system_check_auditon,
3702 .mpo_system_check_swapoff = biba_system_check_swapoff,
3703 .mpo_system_check_swapon = biba_system_check_swapon,
3704 .mpo_system_check_sysctl = biba_system_check_sysctl,
3705
3706 .mpo_sysvmsg_cleanup = biba_sysvmsg_cleanup,
3707 .mpo_sysvmsg_create = biba_sysvmsg_create,
3708 .mpo_sysvmsg_destroy_label = biba_destroy_label,
3709 .mpo_sysvmsg_init_label = biba_init_label,
3710
3711 .mpo_sysvmsq_check_msgrcv = biba_sysvmsq_check_msgrcv,
3712 .mpo_sysvmsq_check_msgrmid = biba_sysvmsq_check_msgrmid,
3713 .mpo_sysvmsq_check_msqget = biba_sysvmsq_check_msqget,
3714 .mpo_sysvmsq_check_msqsnd = biba_sysvmsq_check_msqsnd,
3715 .mpo_sysvmsq_check_msqrcv = biba_sysvmsq_check_msqrcv,
3716 .mpo_sysvmsq_check_msqctl = biba_sysvmsq_check_msqctl,
3717 .mpo_sysvmsq_cleanup = biba_sysvmsq_cleanup,
3718 .mpo_sysvmsq_create = biba_sysvmsq_create,
3719 .mpo_sysvmsq_destroy_label = biba_destroy_label,
3720 .mpo_sysvmsq_init_label = biba_init_label,
3721
3722 .mpo_sysvsem_check_semctl = biba_sysvsem_check_semctl,
3723 .mpo_sysvsem_check_semget = biba_sysvsem_check_semget,
3724 .mpo_sysvsem_check_semop = biba_sysvsem_check_semop,
3725 .mpo_sysvsem_cleanup = biba_sysvsem_cleanup,
3726 .mpo_sysvsem_create = biba_sysvsem_create,
3727 .mpo_sysvsem_destroy_label = biba_destroy_label,
3728 .mpo_sysvsem_init_label = biba_init_label,
3729
3730 .mpo_sysvshm_check_shmat = biba_sysvshm_check_shmat,
3731 .mpo_sysvshm_check_shmctl = biba_sysvshm_check_shmctl,
3732 .mpo_sysvshm_check_shmget = biba_sysvshm_check_shmget,
3733 .mpo_sysvshm_cleanup = biba_sysvshm_cleanup,
3734 .mpo_sysvshm_create = biba_sysvshm_create,
3735 .mpo_sysvshm_destroy_label = biba_destroy_label,
3736 .mpo_sysvshm_init_label = biba_init_label,
3737
3738 .mpo_vnode_associate_extattr = biba_vnode_associate_extattr,
3739 .mpo_vnode_associate_singlelabel = biba_vnode_associate_singlelabel,
3740 .mpo_vnode_check_access = biba_vnode_check_open,
3741 .mpo_vnode_check_chdir = biba_vnode_check_chdir,
3742 .mpo_vnode_check_chroot = biba_vnode_check_chroot,
3743 .mpo_vnode_check_create = biba_vnode_check_create,
3744 .mpo_vnode_check_deleteacl = biba_vnode_check_deleteacl,
3745 .mpo_vnode_check_deleteextattr = biba_vnode_check_deleteextattr,
3746 .mpo_vnode_check_exec = biba_vnode_check_exec,
3747 .mpo_vnode_check_getacl = biba_vnode_check_getacl,
3748 .mpo_vnode_check_getextattr = biba_vnode_check_getextattr,
3749 .mpo_vnode_check_link = biba_vnode_check_link,
3750 .mpo_vnode_check_listextattr = biba_vnode_check_listextattr,
3751 .mpo_vnode_check_lookup = biba_vnode_check_lookup,
3752 .mpo_vnode_check_mmap = biba_vnode_check_mmap,
3753 .mpo_vnode_check_open = biba_vnode_check_open,
3754 .mpo_vnode_check_poll = biba_vnode_check_poll,
3755 .mpo_vnode_check_read = biba_vnode_check_read,
3756 .mpo_vnode_check_readdir = biba_vnode_check_readdir,
3757 .mpo_vnode_check_readlink = biba_vnode_check_readlink,
3758 .mpo_vnode_check_relabel = biba_vnode_check_relabel,
3759 .mpo_vnode_check_rename_from = biba_vnode_check_rename_from,
3760 .mpo_vnode_check_rename_to = biba_vnode_check_rename_to,
3761 .mpo_vnode_check_revoke = biba_vnode_check_revoke,
3762 .mpo_vnode_check_setacl = biba_vnode_check_setacl,
3763 .mpo_vnode_check_setextattr = biba_vnode_check_setextattr,
3764 .mpo_vnode_check_setflags = biba_vnode_check_setflags,
3765 .mpo_vnode_check_setmode = biba_vnode_check_setmode,
3766 .mpo_vnode_check_setowner = biba_vnode_check_setowner,
3767 .mpo_vnode_check_setutimes = biba_vnode_check_setutimes,
3768 .mpo_vnode_check_stat = biba_vnode_check_stat,
3769 .mpo_vnode_check_unlink = biba_vnode_check_unlink,
3770 .mpo_vnode_check_write = biba_vnode_check_write,
3771 .mpo_vnode_create_extattr = biba_vnode_create_extattr,
3772 .mpo_vnode_copy_label = biba_copy_label,
3773 .mpo_vnode_destroy_label = biba_destroy_label,
3774 .mpo_vnode_externalize_label = biba_externalize_label,
3775 .mpo_vnode_init_label = biba_init_label,
3776 .mpo_vnode_internalize_label = biba_internalize_label,
3777 .mpo_vnode_relabel = biba_vnode_relabel,
3778 .mpo_vnode_setlabel_extattr = biba_vnode_setlabel_extattr,
3779 };
3780
3781 MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
3782 MPC_LOADTIME_FLAG_NOTLATE, &biba_slot);
Cache object: a843b1df3992f0128b9be7b353b0854c
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