2 * Copyright (c) 1999-2002, 2007-2011 Robert N. M. Watson
3 * Copyright (c) 2001-2005 McAfee, Inc.
4 * Copyright (c) 2006 SPARTA, Inc.
7 * This software was developed by Robert Watson for the TrustedBSD Project.
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.
14 * This software was enhanced by SPARTA ISSO under SPAWAR contract
15 * N66001-04-C-6019 ("SEFOS").
17 * This software was developed at the University of Cambridge Computer
18 * Laboratory with support from a grant from Google, Inc.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
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.
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
45 * Developed by the TrustedBSD Project.
47 * Biba fixed label mandatory integrity policy.
50 #include <sys/param.h>
52 #include <sys/extattr.h>
53 #include <sys/kernel.h>
55 #include <sys/malloc.h>
57 #include <sys/mount.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>
67 #include <sys/socket.h>
68 #include <sys/socketvar.h>
71 #include <sys/sysctl.h>
76 #include <fs/devfs/devfs.h>
78 #include <net/bpfdesc.h>
80 #include <net/if_types.h>
81 #include <net/if_var.h>
83 #include <netinet/in.h>
84 #include <netinet/in_pcb.h>
85 #include <netinet/ip_var.h>
90 #include <security/mac/mac_policy.h>
91 #include <security/mac_biba/mac_biba.h>
93 SYSCTL_DECL(_security_mac);
95 static SYSCTL_NODE(_security_mac, OID_AUTO, biba, CTLFLAG_RW, 0,
96 "TrustedBSD mac_biba policy controls");
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");
102 static int biba_enabled = 1;
103 SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RWTUN, &biba_enabled,
104 0, "Enforce MAC/Biba policy");
106 static int destroyed_not_inited;
107 SYSCTL_INT(_security_mac_biba, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
108 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
110 static int trust_all_interfaces = 0;
111 SYSCTL_INT(_security_mac_biba, OID_AUTO, trust_all_interfaces, CTLFLAG_RDTUN,
112 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/Biba");
114 static char trusted_interfaces[128];
115 SYSCTL_STRING(_security_mac_biba, OID_AUTO, trusted_interfaces, CTLFLAG_RDTUN,
116 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/Biba");
118 static int max_compartments = MAC_BIBA_MAX_COMPARTMENTS;
119 SYSCTL_INT(_security_mac_biba, OID_AUTO, max_compartments, CTLFLAG_RD,
120 &max_compartments, 0, "Maximum supported compartments");
122 static int ptys_equal = 0;
123 SYSCTL_INT(_security_mac_biba, OID_AUTO, ptys_equal, CTLFLAG_RWTUN, &ptys_equal,
124 0, "Label pty devices as biba/equal on create");
126 static int interfaces_equal = 1;
127 SYSCTL_INT(_security_mac_biba, OID_AUTO, interfaces_equal, CTLFLAG_RWTUN,
128 &interfaces_equal, 0, "Label network interfaces as biba/equal on create");
130 static int revocation_enabled = 0;
131 SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RWTUN,
132 &revocation_enabled, 0, "Revoke access to objects on relabel");
134 static int biba_slot;
135 #define SLOT(l) ((struct mac_biba *)mac_label_get((l), biba_slot))
136 #define SLOT_SET(l, val) mac_label_set((l), biba_slot, (uintptr_t)(val))
138 static uma_zone_t zone_biba;
141 biba_bit_set_empty(u_char *set) {
144 for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
150 static struct mac_biba *
154 return (uma_zalloc(zone_biba, flag | M_ZERO));
158 biba_free(struct mac_biba *mb)
162 uma_zfree(zone_biba, mb);
164 atomic_add_int(&destroyed_not_inited, 1);
168 biba_atmostflags(struct mac_biba *mb, int flags)
171 if ((mb->mb_flags & flags) != mb->mb_flags)
177 biba_dominate_element(struct mac_biba_element *a, struct mac_biba_element *b)
181 switch (a->mbe_type) {
182 case MAC_BIBA_TYPE_EQUAL:
183 case MAC_BIBA_TYPE_HIGH:
186 case MAC_BIBA_TYPE_LOW:
187 switch (b->mbe_type) {
188 case MAC_BIBA_TYPE_GRADE:
189 case MAC_BIBA_TYPE_HIGH:
192 case MAC_BIBA_TYPE_EQUAL:
193 case MAC_BIBA_TYPE_LOW:
197 panic("biba_dominate_element: b->mbe_type invalid");
200 case MAC_BIBA_TYPE_GRADE:
201 switch (b->mbe_type) {
202 case MAC_BIBA_TYPE_EQUAL:
203 case MAC_BIBA_TYPE_LOW:
206 case MAC_BIBA_TYPE_HIGH:
209 case MAC_BIBA_TYPE_GRADE:
210 for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++)
211 if (!MAC_BIBA_BIT_TEST(bit,
212 a->mbe_compartments) &&
213 MAC_BIBA_BIT_TEST(bit, b->mbe_compartments))
215 return (a->mbe_grade >= b->mbe_grade);
218 panic("biba_dominate_element: b->mbe_type invalid");
222 panic("biba_dominate_element: a->mbe_type invalid");
229 biba_subject_dominate_high(struct mac_biba *mb)
231 struct mac_biba_element *element;
233 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
234 ("biba_effective_in_range: mb not effective"));
235 element = &mb->mb_effective;
237 return (element->mbe_type == MAC_BIBA_TYPE_EQUAL ||
238 element->mbe_type == MAC_BIBA_TYPE_HIGH);
242 biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
245 return (biba_dominate_element(&rangeb->mb_rangehigh,
246 &rangea->mb_rangehigh) &&
247 biba_dominate_element(&rangea->mb_rangelow,
248 &rangeb->mb_rangelow));
252 biba_effective_in_range(struct mac_biba *effective, struct mac_biba *range)
255 KASSERT((effective->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
256 ("biba_effective_in_range: a not effective"));
257 KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
258 ("biba_effective_in_range: b not range"));
260 return (biba_dominate_element(&range->mb_rangehigh,
261 &effective->mb_effective) &&
262 biba_dominate_element(&effective->mb_effective,
263 &range->mb_rangelow));
269 biba_dominate_effective(struct mac_biba *a, struct mac_biba *b)
271 KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
272 ("biba_dominate_effective: a not effective"));
273 KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
274 ("biba_dominate_effective: b not effective"));
276 return (biba_dominate_element(&a->mb_effective, &b->mb_effective));
280 biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
283 if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
284 b->mbe_type == MAC_BIBA_TYPE_EQUAL)
287 return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
291 biba_equal_effective(struct mac_biba *a, struct mac_biba *b)
294 KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
295 ("biba_equal_effective: a not effective"));
296 KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
297 ("biba_equal_effective: b not effective"));
299 return (biba_equal_element(&a->mb_effective, &b->mb_effective));
303 biba_contains_equal(struct mac_biba *mb)
306 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
307 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
311 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
312 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
314 if (mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
322 biba_subject_privileged(struct mac_biba *mb)
325 KASSERT((mb->mb_flags & MAC_BIBA_FLAGS_BOTH) == MAC_BIBA_FLAGS_BOTH,
326 ("biba_subject_privileged: subject doesn't have both labels"));
328 /* If the effective is EQUAL, it's ok. */
329 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
332 /* If either range endpoint is EQUAL, it's ok. */
333 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL ||
334 mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
337 /* If the range is low-high, it's ok. */
338 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_LOW &&
339 mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_HIGH)
347 biba_high_effective(struct mac_biba *mb)
350 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
351 ("biba_equal_effective: mb not effective"));
353 return (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_HIGH);
357 biba_valid(struct mac_biba *mb)
360 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
361 switch (mb->mb_effective.mbe_type) {
362 case MAC_BIBA_TYPE_GRADE:
365 case MAC_BIBA_TYPE_EQUAL:
366 case MAC_BIBA_TYPE_HIGH:
367 case MAC_BIBA_TYPE_LOW:
368 if (mb->mb_effective.mbe_grade != 0 ||
369 !MAC_BIBA_BIT_SET_EMPTY(
370 mb->mb_effective.mbe_compartments))
378 if (mb->mb_effective.mbe_type != MAC_BIBA_TYPE_UNDEF)
382 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
383 switch (mb->mb_rangelow.mbe_type) {
384 case MAC_BIBA_TYPE_GRADE:
387 case MAC_BIBA_TYPE_EQUAL:
388 case MAC_BIBA_TYPE_HIGH:
389 case MAC_BIBA_TYPE_LOW:
390 if (mb->mb_rangelow.mbe_grade != 0 ||
391 !MAC_BIBA_BIT_SET_EMPTY(
392 mb->mb_rangelow.mbe_compartments))
400 switch (mb->mb_rangehigh.mbe_type) {
401 case MAC_BIBA_TYPE_GRADE:
404 case MAC_BIBA_TYPE_EQUAL:
405 case MAC_BIBA_TYPE_HIGH:
406 case MAC_BIBA_TYPE_LOW:
407 if (mb->mb_rangehigh.mbe_grade != 0 ||
408 !MAC_BIBA_BIT_SET_EMPTY(
409 mb->mb_rangehigh.mbe_compartments))
416 if (!biba_dominate_element(&mb->mb_rangehigh,
420 if (mb->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
421 mb->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
429 biba_set_range(struct mac_biba *mb, u_short typelow, u_short gradelow,
430 u_char *compartmentslow, u_short typehigh, u_short gradehigh,
431 u_char *compartmentshigh)
434 mb->mb_rangelow.mbe_type = typelow;
435 mb->mb_rangelow.mbe_grade = gradelow;
436 if (compartmentslow != NULL)
437 memcpy(mb->mb_rangelow.mbe_compartments, compartmentslow,
438 sizeof(mb->mb_rangelow.mbe_compartments));
439 mb->mb_rangehigh.mbe_type = typehigh;
440 mb->mb_rangehigh.mbe_grade = gradehigh;
441 if (compartmentshigh != NULL)
442 memcpy(mb->mb_rangehigh.mbe_compartments, compartmentshigh,
443 sizeof(mb->mb_rangehigh.mbe_compartments));
444 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
448 biba_set_effective(struct mac_biba *mb, u_short type, u_short grade,
449 u_char *compartments)
452 mb->mb_effective.mbe_type = type;
453 mb->mb_effective.mbe_grade = grade;
454 if (compartments != NULL)
455 memcpy(mb->mb_effective.mbe_compartments, compartments,
456 sizeof(mb->mb_effective.mbe_compartments));
457 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
461 biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
464 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
465 ("biba_copy_range: labelfrom not range"));
467 labelto->mb_rangelow = labelfrom->mb_rangelow;
468 labelto->mb_rangehigh = labelfrom->mb_rangehigh;
469 labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
473 biba_copy_effective(struct mac_biba *labelfrom, struct mac_biba *labelto)
476 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
477 ("biba_copy_effective: labelfrom not effective"));
479 labelto->mb_effective = labelfrom->mb_effective;
480 labelto->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
484 biba_copy(struct mac_biba *source, struct mac_biba *dest)
487 if (source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE)
488 biba_copy_effective(source, dest);
489 if (source->mb_flags & MAC_BIBA_FLAG_RANGE)
490 biba_copy_range(source, dest);
494 * Policy module operations.
497 biba_init(struct mac_policy_conf *conf)
500 zone_biba = uma_zcreate("mac_biba", sizeof(struct mac_biba), NULL,
501 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
508 biba_init_label(struct label *label)
511 SLOT_SET(label, biba_alloc(M_WAITOK));
515 biba_init_label_waitcheck(struct label *label, int flag)
518 SLOT_SET(label, biba_alloc(flag));
519 if (SLOT(label) == NULL)
526 biba_destroy_label(struct label *label)
529 biba_free(SLOT(label));
530 SLOT_SET(label, NULL);
534 * biba_element_to_string() accepts an sbuf and Biba element. It converts
535 * the Biba element to a string and stores the result in the sbuf; if there
536 * isn't space in the sbuf, -1 is returned.
539 biba_element_to_string(struct sbuf *sb, struct mac_biba_element *element)
543 switch (element->mbe_type) {
544 case MAC_BIBA_TYPE_HIGH:
545 return (sbuf_printf(sb, "high"));
547 case MAC_BIBA_TYPE_LOW:
548 return (sbuf_printf(sb, "low"));
550 case MAC_BIBA_TYPE_EQUAL:
551 return (sbuf_printf(sb, "equal"));
553 case MAC_BIBA_TYPE_GRADE:
554 if (sbuf_printf(sb, "%d", element->mbe_grade) == -1)
558 for (i = 1; i <= MAC_BIBA_MAX_COMPARTMENTS; i++) {
559 if (MAC_BIBA_BIT_TEST(i, element->mbe_compartments)) {
561 if (sbuf_putc(sb, ':') == -1)
563 if (sbuf_printf(sb, "%d", i) == -1)
567 if (sbuf_printf(sb, "+%d", i) == -1)
575 panic("biba_element_to_string: invalid type (%d)",
581 * biba_to_string() converts a Biba label to a string, and places the results
582 * in the passed sbuf. It returns 0 on success, or EINVAL if there isn't
583 * room in the sbuf. Note: the sbuf will be modified even in a failure case,
584 * so the caller may need to revert the sbuf by restoring the offset if
588 biba_to_string(struct sbuf *sb, struct mac_biba *mb)
591 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
592 if (biba_element_to_string(sb, &mb->mb_effective) == -1)
596 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
597 if (sbuf_putc(sb, '(') == -1)
600 if (biba_element_to_string(sb, &mb->mb_rangelow) == -1)
603 if (sbuf_putc(sb, '-') == -1)
606 if (biba_element_to_string(sb, &mb->mb_rangehigh) == -1)
609 if (sbuf_putc(sb, ')') == -1)
617 biba_externalize_label(struct label *label, char *element_name,
618 struct sbuf *sb, int *claimed)
622 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
628 return (biba_to_string(sb, mb));
632 biba_parse_element(struct mac_biba_element *element, char *string)
634 char *compartment, *end, *grade;
637 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
638 element->mbe_type = MAC_BIBA_TYPE_HIGH;
639 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
640 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
641 element->mbe_type = MAC_BIBA_TYPE_LOW;
642 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
643 } else if (strcmp(string, "equal") == 0 ||
644 strcmp(string, "eq") == 0) {
645 element->mbe_type = MAC_BIBA_TYPE_EQUAL;
646 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
648 element->mbe_type = MAC_BIBA_TYPE_GRADE;
651 * Numeric grade piece of the element.
653 grade = strsep(&string, ":");
654 value = strtol(grade, &end, 10);
655 if (end == grade || *end != '\0')
657 if (value < 0 || value > 65535)
659 element->mbe_grade = value;
662 * Optional compartment piece of the element. If none are
663 * included, we assume that the label has no compartments.
670 while ((compartment = strsep(&string, "+")) != NULL) {
671 value = strtol(compartment, &end, 10);
672 if (compartment == end || *end != '\0')
674 if (value < 1 || value > MAC_BIBA_MAX_COMPARTMENTS)
676 MAC_BIBA_BIT_SET(value, element->mbe_compartments);
684 * Note: destructively consumes the string, make a local copy before calling
685 * if that's a problem.
688 biba_parse(struct mac_biba *mb, char *string)
690 char *rangehigh, *rangelow, *effective;
693 effective = strsep(&string, "(");
694 if (*effective == '\0')
697 if (string != NULL) {
698 rangelow = strsep(&string, "-");
701 rangehigh = strsep(&string, ")");
711 KASSERT((rangelow != NULL && rangehigh != NULL) ||
712 (rangelow == NULL && rangehigh == NULL),
713 ("biba_parse: range mismatch"));
715 bzero(mb, sizeof(*mb));
716 if (effective != NULL) {
717 error = biba_parse_element(&mb->mb_effective, effective);
720 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
723 if (rangelow != NULL) {
724 error = biba_parse_element(&mb->mb_rangelow, rangelow);
727 error = biba_parse_element(&mb->mb_rangehigh, rangehigh);
730 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
733 error = biba_valid(mb);
741 biba_internalize_label(struct label *label, char *element_name,
742 char *element_data, int *claimed)
744 struct mac_biba *mb, mb_temp;
747 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
752 error = biba_parse(&mb_temp, element_data);
763 biba_copy_label(struct label *src, struct label *dest)
766 *SLOT(dest) = *SLOT(src);
770 * Object-specific entry point implementations are sorted alphabetically by
771 * object type name and then by operation.
774 biba_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
775 struct ifnet *ifp, struct label *ifplabel)
777 struct mac_biba *a, *b;
785 if (biba_equal_effective(a, b))
791 biba_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
792 struct label *dlabel)
794 struct mac_biba *source, *dest;
796 source = SLOT(cred->cr_label);
799 biba_copy_effective(source, dest);
803 biba_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
804 struct mbuf *m, struct label *mlabel)
806 struct mac_biba *source, *dest;
808 source = SLOT(dlabel);
811 biba_copy_effective(source, dest);
815 biba_cred_associate_nfsd(struct ucred *cred)
817 struct mac_biba *label;
819 label = SLOT(cred->cr_label);
820 biba_set_effective(label, MAC_BIBA_TYPE_LOW, 0, NULL);
821 biba_set_range(label, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
826 biba_cred_check_relabel(struct ucred *cred, struct label *newlabel)
828 struct mac_biba *subj, *new;
831 subj = SLOT(cred->cr_label);
832 new = SLOT(newlabel);
835 * If there is a Biba label update for the credential, it may
836 * be an update of the effective, range, or both.
838 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
843 * If the Biba label is to be changed, authorize as appropriate.
845 if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
847 * If the change request modifies both the Biba label
848 * effective and range, check that the new effective will be
851 if ((new->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
852 MAC_BIBA_FLAGS_BOTH &&
853 !biba_effective_in_range(new, new))
857 * To change the Biba effective label on a credential, the
858 * new effective label must be in the current range.
860 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE &&
861 !biba_effective_in_range(new, subj))
865 * To change the Biba range on a credential, the new range
866 * label must be in the current range.
868 if (new->mb_flags & MAC_BIBA_FLAG_RANGE &&
869 !biba_range_in_range(new, subj))
873 * To have EQUAL in any component of the new credential Biba
874 * label, the subject must already have EQUAL in their label.
876 if (biba_contains_equal(new)) {
877 error = biba_subject_privileged(subj);
887 biba_cred_check_visible(struct ucred *u1, struct ucred *u2)
889 struct mac_biba *subj, *obj;
894 subj = SLOT(u1->cr_label);
895 obj = SLOT(u2->cr_label);
898 if (!biba_dominate_effective(obj, subj))
905 biba_cred_create_init(struct ucred *cred)
907 struct mac_biba *dest;
909 dest = SLOT(cred->cr_label);
911 biba_set_effective(dest, MAC_BIBA_TYPE_HIGH, 0, NULL);
912 biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
917 biba_cred_create_swapper(struct ucred *cred)
919 struct mac_biba *dest;
921 dest = SLOT(cred->cr_label);
923 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
924 biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
929 biba_cred_relabel(struct ucred *cred, struct label *newlabel)
931 struct mac_biba *source, *dest;
933 source = SLOT(newlabel);
934 dest = SLOT(cred->cr_label);
936 biba_copy(source, dest);
940 biba_devfs_create_device(struct ucred *cred, struct mount *mp,
941 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
949 if (strcmp(dn, "null") == 0 ||
950 strcmp(dn, "zero") == 0 ||
951 strcmp(dn, "random") == 0 ||
952 strncmp(dn, "fd/", strlen("fd/")) == 0)
953 biba_type = MAC_BIBA_TYPE_EQUAL;
954 else if (ptys_equal &&
955 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
956 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
957 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
958 biba_type = MAC_BIBA_TYPE_EQUAL;
960 biba_type = MAC_BIBA_TYPE_HIGH;
961 biba_set_effective(mb, biba_type, 0, NULL);
965 biba_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
966 struct devfs_dirent *de, struct label *delabel)
972 biba_set_effective(mb, MAC_BIBA_TYPE_HIGH, 0, NULL);
976 biba_devfs_create_symlink(struct ucred *cred, struct mount *mp,
977 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
978 struct label *delabel)
980 struct mac_biba *source, *dest;
982 source = SLOT(cred->cr_label);
983 dest = SLOT(delabel);
985 biba_copy_effective(source, dest);
989 biba_devfs_update(struct mount *mp, struct devfs_dirent *de,
990 struct label *delabel, struct vnode *vp, struct label *vplabel)
992 struct mac_biba *source, *dest;
994 source = SLOT(vplabel);
995 dest = SLOT(delabel);
997 biba_copy(source, dest);
1001 biba_devfs_vnode_associate(struct mount *mp, struct label *mntlabel,
1002 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1003 struct label *vplabel)
1005 struct mac_biba *source, *dest;
1007 source = SLOT(delabel);
1008 dest = SLOT(vplabel);
1010 biba_copy_effective(source, dest);
1014 biba_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1015 struct label *ifplabel, struct label *newlabel)
1017 struct mac_biba *subj, *new;
1020 subj = SLOT(cred->cr_label);
1021 new = SLOT(newlabel);
1024 * If there is a Biba label update for the interface, it may be an
1025 * update of the effective, range, or both.
1027 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
1032 * Relabling network interfaces requires Biba privilege.
1034 error = biba_subject_privileged(subj);
1042 biba_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1043 struct mbuf *m, struct label *mlabel)
1045 struct mac_biba *p, *i;
1053 return (biba_effective_in_range(p, i) ? 0 : EACCES);
1057 biba_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1059 char tifname[IFNAMSIZ], *p, *q;
1060 char tiflist[sizeof(trusted_interfaces)];
1061 struct mac_biba *dest;
1064 dest = SLOT(ifplabel);
1066 if (ifp->if_type == IFT_LOOP || interfaces_equal != 0) {
1067 type = MAC_BIBA_TYPE_EQUAL;
1071 if (trust_all_interfaces) {
1072 type = MAC_BIBA_TYPE_HIGH;
1076 type = MAC_BIBA_TYPE_LOW;
1078 if (trusted_interfaces[0] == '\0' ||
1079 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1082 bzero(tiflist, sizeof(tiflist));
1083 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1084 if(*p != ' ' && *p != '\t')
1087 for (p = q = tiflist;; p++) {
1088 if (*p == ',' || *p == '\0') {
1090 if (len < IFNAMSIZ) {
1091 bzero(tifname, sizeof(tifname));
1092 bcopy(q, tifname, len);
1093 if (strcmp(tifname, ifp->if_xname) == 0) {
1094 type = MAC_BIBA_TYPE_HIGH;
1099 printf("mac_biba warning: interface name "
1100 "\"%s\" is too long (must be < %d)\n",
1109 biba_set_effective(dest, type, 0, NULL);
1110 biba_set_range(dest, type, 0, NULL, type, 0, NULL);
1114 biba_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1115 struct mbuf *m, struct label *mlabel)
1117 struct mac_biba *source, *dest;
1119 source = SLOT(ifplabel);
1120 dest = SLOT(mlabel);
1122 biba_copy_effective(source, dest);
1126 biba_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1127 struct label *ifplabel, struct label *newlabel)
1129 struct mac_biba *source, *dest;
1131 source = SLOT(newlabel);
1132 dest = SLOT(ifplabel);
1134 biba_copy(source, dest);
1138 biba_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1139 struct mbuf *m, struct label *mlabel)
1141 struct mac_biba *p, *i;
1149 return (biba_equal_effective(p, i) ? 0 : EACCES);
1153 biba_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1154 struct label *inplabel)
1156 struct mac_biba *subj, *obj;
1161 subj = SLOT(cred->cr_label);
1162 obj = SLOT(inplabel);
1164 if (!biba_dominate_effective(obj, subj))
1171 biba_inpcb_create(struct socket *so, struct label *solabel,
1172 struct inpcb *inp, struct label *inplabel)
1174 struct mac_biba *source, *dest;
1176 source = SLOT(solabel);
1177 dest = SLOT(inplabel);
1180 biba_copy_effective(source, dest);
1185 biba_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1186 struct mbuf *m, struct label *mlabel)
1188 struct mac_biba *source, *dest;
1190 source = SLOT(inplabel);
1191 dest = SLOT(mlabel);
1193 biba_copy_effective(source, dest);
1197 biba_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1198 struct inpcb *inp, struct label *inplabel)
1200 struct mac_biba *source, *dest;
1202 SOCK_LOCK_ASSERT(so);
1204 source = SLOT(solabel);
1205 dest = SLOT(inplabel);
1207 biba_copy(source, dest);
1211 biba_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1212 struct label *q6label)
1214 struct mac_biba *source, *dest;
1216 source = SLOT(mlabel);
1217 dest = SLOT(q6label);
1219 biba_copy_effective(source, dest);
1223 biba_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1224 struct label *q6label)
1226 struct mac_biba *a, *b;
1231 return (biba_equal_effective(a, b));
1235 biba_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1236 struct label *mlabel)
1238 struct mac_biba *source, *dest;
1240 source = SLOT(q6label);
1241 dest = SLOT(mlabel);
1243 /* Just use the head, since we require them all to match. */
1244 biba_copy_effective(source, dest);
1248 biba_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1249 struct label *q6label)
1252 /* NOOP: we only accept matching labels, so no need to update */
1256 biba_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1257 struct label *qlabel)
1259 struct mac_biba *source, *dest;
1261 source = SLOT(mlabel);
1262 dest = SLOT(qlabel);
1264 biba_copy_effective(source, dest);
1268 biba_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1269 struct label *qlabel)
1271 struct mac_biba *a, *b;
1276 return (biba_equal_effective(a, b));
1280 biba_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1281 struct label *mlabel)
1283 struct mac_biba *source, *dest;
1285 source = SLOT(qlabel);
1286 dest = SLOT(mlabel);
1288 /* Just use the head, since we require them all to match. */
1289 biba_copy_effective(source, dest);
1293 biba_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1294 struct label *qlabel)
1297 /* NOOP: we only accept matching labels, so no need to update */
1301 biba_kld_check_load(struct ucred *cred, struct vnode *vp,
1302 struct label *vplabel)
1304 struct mac_biba *subj, *obj;
1310 subj = SLOT(cred->cr_label);
1312 error = biba_subject_privileged(subj);
1316 obj = SLOT(vplabel);
1317 if (!biba_high_effective(obj))
1324 biba_mount_check_stat(struct ucred *cred, struct mount *mp,
1325 struct label *mplabel)
1327 struct mac_biba *subj, *obj;
1332 subj = SLOT(cred->cr_label);
1333 obj = SLOT(mplabel);
1335 if (!biba_dominate_effective(obj, subj))
1342 biba_mount_create(struct ucred *cred, struct mount *mp,
1343 struct label *mplabel)
1345 struct mac_biba *source, *dest;
1347 source = SLOT(cred->cr_label);
1348 dest = SLOT(mplabel);
1350 biba_copy_effective(source, dest);
1354 biba_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1355 struct mbuf *m, struct label *mlabel)
1357 struct mac_biba *dest;
1359 dest = SLOT(mlabel);
1361 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1365 biba_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1366 struct mbuf *msend, struct label *msendlabel)
1368 struct mac_biba *source, *dest;
1370 source = SLOT(mrecvlabel);
1371 dest = SLOT(msendlabel);
1373 biba_copy_effective(source, dest);
1377 biba_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1379 struct mac_biba *dest;
1381 dest = SLOT(mlabel);
1383 /* XXX: where is the label for the firewall really coming from? */
1384 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1388 biba_netinet_fragment(struct mbuf *m, struct label *mlabel,
1389 struct mbuf *frag, struct label *fraglabel)
1391 struct mac_biba *source, *dest;
1393 source = SLOT(mlabel);
1394 dest = SLOT(fraglabel);
1396 biba_copy_effective(source, dest);
1400 biba_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1401 struct mbuf *msend, struct label *msendlabel)
1403 struct mac_biba *source, *dest;
1405 source = SLOT(mrecvlabel);
1406 dest = SLOT(msendlabel);
1408 biba_copy_effective(source, dest);
1412 biba_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1413 struct mbuf *m, struct label *mlabel)
1415 struct mac_biba *dest;
1417 dest = SLOT(mlabel);
1419 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1423 biba_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1424 struct mbuf *m, struct label *mlabel)
1426 struct mac_biba *dest;
1428 dest = SLOT(mlabel);
1430 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1434 biba_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1435 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1441 /* XXX: This will be implemented soon... */
1447 biba_pipe_check_poll(struct ucred *cred, struct pipepair *pp,
1448 struct label *pplabel)
1450 struct mac_biba *subj, *obj;
1455 subj = SLOT(cred->cr_label);
1456 obj = SLOT(pplabel);
1458 if (!biba_dominate_effective(obj, subj))
1465 biba_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1466 struct label *pplabel)
1468 struct mac_biba *subj, *obj;
1473 subj = SLOT(cred->cr_label);
1474 obj = SLOT(pplabel);
1476 if (!biba_dominate_effective(obj, subj))
1483 biba_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1484 struct label *pplabel, struct label *newlabel)
1486 struct mac_biba *subj, *obj, *new;
1489 new = SLOT(newlabel);
1490 subj = SLOT(cred->cr_label);
1491 obj = SLOT(pplabel);
1494 * If there is a Biba label update for a pipe, it must be a effective
1497 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
1502 * To perform a relabel of a pipe (Biba label or not), Biba must
1503 * authorize the relabel.
1505 if (!biba_effective_in_range(obj, subj))
1509 * If the Biba label is to be changed, authorize as appropriate.
1511 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
1513 * To change the Biba label on a pipe, the new pipe label
1514 * must be in the subject range.
1516 if (!biba_effective_in_range(new, subj))
1520 * To change the Biba label on a pipe to be EQUAL, the
1521 * subject must have appropriate privilege.
1523 if (biba_contains_equal(new)) {
1524 error = biba_subject_privileged(subj);
1534 biba_pipe_check_stat(struct ucred *cred, struct pipepair *pp,
1535 struct label *pplabel)
1537 struct mac_biba *subj, *obj;
1542 subj = SLOT(cred->cr_label);
1543 obj = SLOT(pplabel);
1545 if (!biba_dominate_effective(obj, subj))
1552 biba_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1553 struct label *pplabel)
1555 struct mac_biba *subj, *obj;
1560 subj = SLOT(cred->cr_label);
1561 obj = SLOT(pplabel);
1563 if (!biba_dominate_effective(subj, obj))
1570 biba_pipe_create(struct ucred *cred, struct pipepair *pp,
1571 struct label *pplabel)
1573 struct mac_biba *source, *dest;
1575 source = SLOT(cred->cr_label);
1576 dest = SLOT(pplabel);
1578 biba_copy_effective(source, dest);
1582 biba_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1583 struct label *pplabel, struct label *newlabel)
1585 struct mac_biba *source, *dest;
1587 source = SLOT(newlabel);
1588 dest = SLOT(pplabel);
1590 biba_copy(source, dest);
1594 biba_posixsem_check_openunlink(struct ucred *cred, struct ksem *ks,
1595 struct label *kslabel)
1597 struct mac_biba *subj, *obj;
1602 subj = SLOT(cred->cr_label);
1603 obj = SLOT(kslabel);
1605 if (!biba_dominate_effective(subj, obj))
1612 biba_posixsem_check_setmode(struct ucred *cred, struct ksem *ks,
1613 struct label *kslabel, mode_t mode)
1615 struct mac_biba *subj, *obj;
1620 subj = SLOT(cred->cr_label);
1621 obj = SLOT(kslabel);
1623 if (!biba_dominate_effective(subj, obj))
1630 biba_posixsem_check_setowner(struct ucred *cred, struct ksem *ks,
1631 struct label *kslabel, uid_t uid, gid_t gid)
1633 struct mac_biba *subj, *obj;
1638 subj = SLOT(cred->cr_label);
1639 obj = SLOT(kslabel);
1641 if (!biba_dominate_effective(subj, obj))
1648 biba_posixsem_check_write(struct ucred *active_cred, struct ucred *file_cred,
1649 struct ksem *ks, struct label *kslabel)
1651 struct mac_biba *subj, *obj;
1656 subj = SLOT(active_cred->cr_label);
1657 obj = SLOT(kslabel);
1659 if (!biba_dominate_effective(subj, obj))
1666 biba_posixsem_check_rdonly(struct ucred *active_cred, struct ucred *file_cred,
1667 struct ksem *ks, struct label *kslabel)
1669 struct mac_biba *subj, *obj;
1674 subj = SLOT(active_cred->cr_label);
1675 obj = SLOT(kslabel);
1677 if (!biba_dominate_effective(obj, subj))
1684 biba_posixsem_create(struct ucred *cred, struct ksem *ks,
1685 struct label *kslabel)
1687 struct mac_biba *source, *dest;
1689 source = SLOT(cred->cr_label);
1690 dest = SLOT(kslabel);
1692 biba_copy_effective(source, dest);
1696 biba_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd,
1697 struct label *shmlabel, int prot, int flags)
1699 struct mac_biba *subj, *obj;
1701 if (!biba_enabled || !revocation_enabled)
1704 subj = SLOT(cred->cr_label);
1705 obj = SLOT(shmlabel);
1707 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
1708 if (!biba_dominate_effective(obj, subj))
1711 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
1712 if (!biba_dominate_effective(subj, obj))
1720 biba_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd,
1721 struct label *shmlabel, accmode_t accmode)
1723 struct mac_biba *subj, *obj;
1728 subj = SLOT(cred->cr_label);
1729 obj = SLOT(shmlabel);
1731 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
1732 if (!biba_dominate_effective(obj, subj))
1735 if (accmode & VMODIFY_PERMS) {
1736 if (!biba_dominate_effective(subj, obj))
1744 biba_posixshm_check_read(struct ucred *active_cred, struct ucred *file_cred,
1745 struct shmfd *vp, struct label *shmlabel)
1747 struct mac_biba *subj, *obj;
1749 if (!biba_enabled || !revocation_enabled)
1752 subj = SLOT(active_cred->cr_label);
1753 obj = SLOT(shmlabel);
1755 if (!biba_dominate_effective(obj, subj))
1762 biba_posixshm_check_setmode(struct ucred *cred, struct shmfd *shmfd,
1763 struct label *shmlabel, mode_t mode)
1765 struct mac_biba *subj, *obj;
1770 subj = SLOT(cred->cr_label);
1771 obj = SLOT(shmlabel);
1773 if (!biba_dominate_effective(subj, obj))
1780 biba_posixshm_check_setowner(struct ucred *cred, struct shmfd *shmfd,
1781 struct label *shmlabel, uid_t uid, gid_t gid)
1783 struct mac_biba *subj, *obj;
1788 subj = SLOT(cred->cr_label);
1789 obj = SLOT(shmlabel);
1791 if (!biba_dominate_effective(subj, obj))
1798 biba_posixshm_check_stat(struct ucred *active_cred, struct ucred *file_cred,
1799 struct shmfd *shmfd, struct label *shmlabel)
1801 struct mac_biba *subj, *obj;
1806 subj = SLOT(active_cred->cr_label);
1807 obj = SLOT(shmlabel);
1809 if (!biba_dominate_effective(obj, subj))
1816 biba_posixshm_check_truncate(struct ucred *active_cred,
1817 struct ucred *file_cred, struct shmfd *shmfd, struct label *shmlabel)
1819 struct mac_biba *subj, *obj;
1824 subj = SLOT(active_cred->cr_label);
1825 obj = SLOT(shmlabel);
1827 if (!biba_dominate_effective(subj, obj))
1834 biba_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd,
1835 struct label *shmlabel)
1837 struct mac_biba *subj, *obj;
1842 subj = SLOT(cred->cr_label);
1843 obj = SLOT(shmlabel);
1845 if (!biba_dominate_effective(subj, obj))
1852 biba_posixshm_check_write(struct ucred *active_cred, struct ucred *file_cred,
1853 struct shmfd *vp, struct label *shmlabel)
1855 struct mac_biba *subj, *obj;
1857 if (!biba_enabled || !revocation_enabled)
1860 subj = SLOT(active_cred->cr_label);
1861 obj = SLOT(shmlabel);
1863 if (!biba_dominate_effective(obj, subj))
1870 biba_posixshm_create(struct ucred *cred, struct shmfd *shmfd,
1871 struct label *shmlabel)
1873 struct mac_biba *source, *dest;
1875 source = SLOT(cred->cr_label);
1876 dest = SLOT(shmlabel);
1878 biba_copy_effective(source, dest);
1882 * Some system privileges are allowed regardless of integrity grade; others
1883 * are allowed only when running with privilege with respect to the Biba
1884 * policy as they might otherwise allow bypassing of the integrity policy.
1887 biba_priv_check(struct ucred *cred, int priv)
1889 struct mac_biba *subj;
1896 * Exempt only specific privileges from the Biba integrity policy.
1903 * Allow processes to manipulate basic process audit properties, and
1904 * to submit audit records.
1906 case PRIV_AUDIT_GETAUDIT:
1907 case PRIV_AUDIT_SETAUDIT:
1908 case PRIV_AUDIT_SUBMIT:
1911 * Allow processes to manipulate their regular UNIX credentials.
1913 case PRIV_CRED_SETUID:
1914 case PRIV_CRED_SETEUID:
1915 case PRIV_CRED_SETGID:
1916 case PRIV_CRED_SETEGID:
1917 case PRIV_CRED_SETGROUPS:
1918 case PRIV_CRED_SETREUID:
1919 case PRIV_CRED_SETREGID:
1920 case PRIV_CRED_SETRESUID:
1921 case PRIV_CRED_SETRESGID:
1924 * Allow processes to perform system monitoring.
1926 case PRIV_SEEOTHERGIDS:
1927 case PRIV_SEEOTHERUIDS:
1931 * Allow access to general process debugging facilities. We
1932 * separately control debugging based on MAC label.
1934 case PRIV_DEBUG_DIFFCRED:
1935 case PRIV_DEBUG_SUGID:
1936 case PRIV_DEBUG_UNPRIV:
1939 * Allow manipulating jails.
1941 case PRIV_JAIL_ATTACH:
1944 * Allow privilege with respect to the Partition policy, but not the
1947 case PRIV_MAC_PARTITION:
1950 * Allow privilege with respect to process resource limits and login
1953 case PRIV_PROC_LIMIT:
1954 case PRIV_PROC_SETLOGIN:
1955 case PRIV_PROC_SETRLIMIT:
1958 * Allow System V and POSIX IPC privileges.
1961 case PRIV_IPC_WRITE:
1962 case PRIV_IPC_ADMIN:
1963 case PRIV_IPC_MSGSIZE:
1967 * Allow certain scheduler manipulations -- possibly this should be
1968 * controlled by more fine-grained policy, as potentially low
1969 * integrity processes can deny CPU to higher integrity ones.
1971 case PRIV_SCHED_DIFFCRED:
1972 case PRIV_SCHED_SETPRIORITY:
1973 case PRIV_SCHED_RTPRIO:
1974 case PRIV_SCHED_SETPOLICY:
1975 case PRIV_SCHED_SET:
1976 case PRIV_SCHED_SETPARAM:
1979 * More IPC privileges.
1981 case PRIV_SEM_WRITE:
1984 * Allow signaling privileges subject to integrity policy.
1986 case PRIV_SIGNAL_DIFFCRED:
1987 case PRIV_SIGNAL_SUGID:
1990 * Allow access to only limited sysctls from lower integrity levels;
1991 * piggy-back on the Jail definition.
1993 case PRIV_SYSCTL_WRITEJAIL:
1996 * Allow TTY-based privileges, subject to general device access using
1997 * labels on TTY device nodes, but not console privilege.
1999 case PRIV_TTY_DRAINWAIT:
2000 case PRIV_TTY_DTRWAIT:
2001 case PRIV_TTY_EXCLUSIVE:
2006 * Grant most VFS privileges, as almost all are in practice bounded
2007 * by more specific checks using labels.
2010 case PRIV_VFS_WRITE:
2011 case PRIV_VFS_ADMIN:
2013 case PRIV_VFS_LOOKUP:
2014 case PRIV_VFS_CHFLAGS_DEV:
2015 case PRIV_VFS_CHOWN:
2016 case PRIV_VFS_CHROOT:
2017 case PRIV_VFS_RETAINSUGID:
2018 case PRIV_VFS_EXCEEDQUOTA:
2019 case PRIV_VFS_FCHROOT:
2020 case PRIV_VFS_FHOPEN:
2021 case PRIV_VFS_FHSTATFS:
2022 case PRIV_VFS_GENERATION:
2023 case PRIV_VFS_GETFH:
2024 case PRIV_VFS_GETQUOTA:
2026 case PRIV_VFS_MOUNT:
2027 case PRIV_VFS_MOUNT_OWNER:
2028 case PRIV_VFS_MOUNT_PERM:
2029 case PRIV_VFS_MOUNT_SUIDDIR:
2030 case PRIV_VFS_MOUNT_NONUSER:
2031 case PRIV_VFS_SETGID:
2032 case PRIV_VFS_STICKYFILE:
2033 case PRIV_VFS_SYSFLAGS:
2034 case PRIV_VFS_UNMOUNT:
2037 * Allow VM privileges; it would be nice if these were subject to
2040 case PRIV_VM_MADV_PROTECT:
2042 case PRIV_VM_MUNLOCK:
2043 case PRIV_VM_SWAP_NOQUOTA:
2044 case PRIV_VM_SWAP_NORLIMIT:
2047 * Allow some but not all network privileges. In general, dont allow
2048 * reconfiguring the network stack, just normal use.
2050 case PRIV_NETINET_RESERVEDPORT:
2051 case PRIV_NETINET_RAW:
2052 case PRIV_NETINET_REUSEPORT:
2056 * All remaining system privileges are allow only if the process
2057 * holds privilege with respect to the Biba policy.
2060 subj = SLOT(cred->cr_label);
2061 error = biba_subject_privileged(subj);
2069 biba_proc_check_debug(struct ucred *cred, struct proc *p)
2071 struct mac_biba *subj, *obj;
2076 subj = SLOT(cred->cr_label);
2077 obj = SLOT(p->p_ucred->cr_label);
2079 /* XXX: range checks */
2080 if (!biba_dominate_effective(obj, subj))
2082 if (!biba_dominate_effective(subj, obj))
2089 biba_proc_check_sched(struct ucred *cred, struct proc *p)
2091 struct mac_biba *subj, *obj;
2096 subj = SLOT(cred->cr_label);
2097 obj = SLOT(p->p_ucred->cr_label);
2099 /* XXX: range checks */
2100 if (!biba_dominate_effective(obj, subj))
2102 if (!biba_dominate_effective(subj, obj))
2109 biba_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
2111 struct mac_biba *subj, *obj;
2116 subj = SLOT(cred->cr_label);
2117 obj = SLOT(p->p_ucred->cr_label);
2119 /* XXX: range checks */
2120 if (!biba_dominate_effective(obj, subj))
2122 if (!biba_dominate_effective(subj, obj))
2129 biba_socket_check_deliver(struct socket *so, struct label *solabel,
2130 struct mbuf *m, struct label *mlabel)
2132 struct mac_biba *p, *s;
2142 error = biba_equal_effective(p, s) ? 0 : EACCES;
2148 biba_socket_check_relabel(struct ucred *cred, struct socket *so,
2149 struct label *solabel, struct label *newlabel)
2151 struct mac_biba *subj, *obj, *new;
2154 SOCK_LOCK_ASSERT(so);
2156 new = SLOT(newlabel);
2157 subj = SLOT(cred->cr_label);
2158 obj = SLOT(solabel);
2161 * If there is a Biba label update for the socket, it may be an
2162 * update of effective.
2164 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
2169 * To relabel a socket, the old socket effective must be in the
2172 if (!biba_effective_in_range(obj, subj))
2176 * If the Biba label is to be changed, authorize as appropriate.
2178 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
2180 * To relabel a socket, the new socket effective must be in
2181 * the subject range.
2183 if (!biba_effective_in_range(new, subj))
2187 * To change the Biba label on the socket to contain EQUAL,
2188 * the subject must have appropriate privilege.
2190 if (biba_contains_equal(new)) {
2191 error = biba_subject_privileged(subj);
2201 biba_socket_check_visible(struct ucred *cred, struct socket *so,
2202 struct label *solabel)
2204 struct mac_biba *subj, *obj;
2209 subj = SLOT(cred->cr_label);
2210 obj = SLOT(solabel);
2213 if (!biba_dominate_effective(obj, subj)) {
2223 biba_socket_create(struct ucred *cred, struct socket *so,
2224 struct label *solabel)
2226 struct mac_biba *source, *dest;
2228 source = SLOT(cred->cr_label);
2229 dest = SLOT(solabel);
2231 biba_copy_effective(source, dest);
2235 biba_socket_create_mbuf(struct socket *so, struct label *solabel,
2236 struct mbuf *m, struct label *mlabel)
2238 struct mac_biba *source, *dest;
2240 source = SLOT(solabel);
2241 dest = SLOT(mlabel);
2244 biba_copy_effective(source, dest);
2249 biba_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2250 struct socket *newso, struct label *newsolabel)
2252 struct mac_biba source, *dest;
2255 source = *SLOT(oldsolabel);
2258 dest = SLOT(newsolabel);
2261 biba_copy_effective(&source, dest);
2266 biba_socket_relabel(struct ucred *cred, struct socket *so,
2267 struct label *solabel, struct label *newlabel)
2269 struct mac_biba *source, *dest;
2271 SOCK_LOCK_ASSERT(so);
2273 source = SLOT(newlabel);
2274 dest = SLOT(solabel);
2276 biba_copy(source, dest);
2280 biba_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2281 struct socket *so, struct label *sopeerlabel)
2283 struct mac_biba *source, *dest;
2285 source = SLOT(mlabel);
2286 dest = SLOT(sopeerlabel);
2289 biba_copy_effective(source, dest);
2294 biba_socketpeer_set_from_socket(struct socket *oldso,
2295 struct label *oldsolabel, struct socket *newso,
2296 struct label *newsopeerlabel)
2298 struct mac_biba source, *dest;
2301 source = *SLOT(oldsolabel);
2303 dest = SLOT(newsopeerlabel);
2306 biba_copy_effective(&source, dest);
2311 biba_syncache_create(struct label *label, struct inpcb *inp)
2313 struct mac_biba *source, *dest;
2315 source = SLOT(inp->inp_label);
2317 biba_copy_effective(source, dest);
2321 biba_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2322 struct label *mlabel)
2324 struct mac_biba *source, *dest;
2326 source = SLOT(sc_label);
2327 dest = SLOT(mlabel);
2328 biba_copy_effective(source, dest);
2332 biba_system_check_acct(struct ucred *cred, struct vnode *vp,
2333 struct label *vplabel)
2335 struct mac_biba *subj, *obj;
2341 subj = SLOT(cred->cr_label);
2343 error = biba_subject_privileged(subj);
2347 if (vplabel == NULL)
2350 obj = SLOT(vplabel);
2351 if (!biba_high_effective(obj))
2358 biba_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2359 struct label *vplabel)
2361 struct mac_biba *subj, *obj;
2367 subj = SLOT(cred->cr_label);
2369 error = biba_subject_privileged(subj);
2373 if (vplabel == NULL)
2376 obj = SLOT(vplabel);
2377 if (!biba_high_effective(obj))
2384 biba_system_check_auditon(struct ucred *cred, int cmd)
2386 struct mac_biba *subj;
2392 subj = SLOT(cred->cr_label);
2394 error = biba_subject_privileged(subj);
2402 biba_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2403 struct label *label)
2405 struct mac_biba *subj;
2411 subj = SLOT(cred->cr_label);
2413 error = biba_subject_privileged(subj);
2421 biba_system_check_swapon(struct ucred *cred, struct vnode *vp,
2422 struct label *vplabel)
2424 struct mac_biba *subj, *obj;
2430 subj = SLOT(cred->cr_label);
2431 obj = SLOT(vplabel);
2433 error = biba_subject_privileged(subj);
2437 if (!biba_high_effective(obj))
2444 biba_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2445 void *arg1, int arg2, struct sysctl_req *req)
2447 struct mac_biba *subj;
2453 subj = SLOT(cred->cr_label);
2456 * Treat sysctl variables without CTLFLAG_ANYBODY flag as biba/high,
2457 * but also require privilege to change them.
2459 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2460 if (!biba_subject_dominate_high(subj))
2463 error = biba_subject_privileged(subj);
2472 biba_sysvmsg_cleanup(struct label *msglabel)
2475 bzero(SLOT(msglabel), sizeof(struct mac_biba));
2479 biba_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2480 struct label *msqlabel, struct msg *msgptr, struct label *msglabel)
2482 struct mac_biba *source, *dest;
2484 /* Ignore the msgq label */
2485 source = SLOT(cred->cr_label);
2486 dest = SLOT(msglabel);
2488 biba_copy_effective(source, dest);
2492 biba_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr,
2493 struct label *msglabel)
2495 struct mac_biba *subj, *obj;
2500 subj = SLOT(cred->cr_label);
2501 obj = SLOT(msglabel);
2503 if (!biba_dominate_effective(obj, subj))
2510 biba_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr,
2511 struct label *msglabel)
2513 struct mac_biba *subj, *obj;
2518 subj = SLOT(cred->cr_label);
2519 obj = SLOT(msglabel);
2521 if (!biba_dominate_effective(subj, obj))
2528 biba_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr,
2529 struct label *msqklabel)
2531 struct mac_biba *subj, *obj;
2536 subj = SLOT(cred->cr_label);
2537 obj = SLOT(msqklabel);
2539 if (!biba_dominate_effective(obj, subj))
2546 biba_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr,
2547 struct label *msqklabel)
2549 struct mac_biba *subj, *obj;
2554 subj = SLOT(cred->cr_label);
2555 obj = SLOT(msqklabel);
2557 if (!biba_dominate_effective(subj, obj))
2564 biba_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr,
2565 struct label *msqklabel)
2567 struct mac_biba *subj, *obj;
2572 subj = SLOT(cred->cr_label);
2573 obj = SLOT(msqklabel);
2575 if (!biba_dominate_effective(obj, subj))
2582 biba_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
2583 struct label *msqklabel, int cmd)
2585 struct mac_biba *subj, *obj;
2590 subj = SLOT(cred->cr_label);
2591 obj = SLOT(msqklabel);
2596 if (!biba_dominate_effective(subj, obj))
2601 if (!biba_dominate_effective(obj, subj))
2613 biba_sysvmsq_cleanup(struct label *msqlabel)
2616 bzero(SLOT(msqlabel), sizeof(struct mac_biba));
2620 biba_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2621 struct label *msqlabel)
2623 struct mac_biba *source, *dest;
2625 source = SLOT(cred->cr_label);
2626 dest = SLOT(msqlabel);
2628 biba_copy_effective(source, dest);
2632 biba_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr,
2633 struct label *semaklabel, int cmd)
2635 struct mac_biba *subj, *obj;
2640 subj = SLOT(cred->cr_label);
2641 obj = SLOT(semaklabel);
2648 if (!biba_dominate_effective(subj, obj))
2658 if (!biba_dominate_effective(obj, subj))
2670 biba_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr,
2671 struct label *semaklabel)
2673 struct mac_biba *subj, *obj;
2678 subj = SLOT(cred->cr_label);
2679 obj = SLOT(semaklabel);
2681 if (!biba_dominate_effective(obj, subj))
2688 biba_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr,
2689 struct label *semaklabel, size_t accesstype)
2691 struct mac_biba *subj, *obj;
2696 subj = SLOT(cred->cr_label);
2697 obj = SLOT(semaklabel);
2699 if (accesstype & SEM_R)
2700 if (!biba_dominate_effective(obj, subj))
2703 if (accesstype & SEM_A)
2704 if (!biba_dominate_effective(subj, obj))
2711 biba_sysvsem_cleanup(struct label *semalabel)
2714 bzero(SLOT(semalabel), sizeof(struct mac_biba));
2718 biba_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr,
2719 struct label *semalabel)
2721 struct mac_biba *source, *dest;
2723 source = SLOT(cred->cr_label);
2724 dest = SLOT(semalabel);
2726 biba_copy_effective(source, dest);
2730 biba_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
2731 struct label *shmseglabel, int shmflg)
2733 struct mac_biba *subj, *obj;
2738 subj = SLOT(cred->cr_label);
2739 obj = SLOT(shmseglabel);
2741 if (!biba_dominate_effective(obj, subj))
2743 if ((shmflg & SHM_RDONLY) == 0) {
2744 if (!biba_dominate_effective(subj, obj))
2752 biba_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
2753 struct label *shmseglabel, int cmd)
2755 struct mac_biba *subj, *obj;
2760 subj = SLOT(cred->cr_label);
2761 obj = SLOT(shmseglabel);
2766 if (!biba_dominate_effective(subj, obj))
2772 if (!biba_dominate_effective(obj, subj))
2784 biba_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
2785 struct label *shmseglabel, int shmflg)
2787 struct mac_biba *subj, *obj;
2792 subj = SLOT(cred->cr_label);
2793 obj = SLOT(shmseglabel);
2795 if (!biba_dominate_effective(obj, subj))
2802 biba_sysvshm_cleanup(struct label *shmlabel)
2805 bzero(SLOT(shmlabel), sizeof(struct mac_biba));
2809 biba_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr,
2810 struct label *shmlabel)
2812 struct mac_biba *source, *dest;
2814 source = SLOT(cred->cr_label);
2815 dest = SLOT(shmlabel);
2817 biba_copy_effective(source, dest);
2821 biba_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2822 struct vnode *vp, struct label *vplabel)
2824 struct mac_biba mb_temp, *source, *dest;
2827 source = SLOT(mplabel);
2828 dest = SLOT(vplabel);
2830 buflen = sizeof(mb_temp);
2831 bzero(&mb_temp, buflen);
2833 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
2834 MAC_BIBA_EXTATTR_NAME, &buflen, (char *) &mb_temp, curthread);
2835 if (error == ENOATTR || error == EOPNOTSUPP) {
2836 /* Fall back to the mntlabel. */
2837 biba_copy_effective(source, dest);
2842 if (buflen != sizeof(mb_temp)) {
2843 printf("biba_vnode_associate_extattr: bad size %d\n",
2847 if (biba_valid(&mb_temp) != 0) {
2848 printf("biba_vnode_associate_extattr: invalid\n");
2851 if ((mb_temp.mb_flags & MAC_BIBA_FLAGS_BOTH) !=
2852 MAC_BIBA_FLAG_EFFECTIVE) {
2853 printf("biba_vnode_associate_extattr: not effective\n");
2857 biba_copy_effective(&mb_temp, dest);
2862 biba_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2863 struct vnode *vp, struct label *vplabel)
2865 struct mac_biba *source, *dest;
2867 source = SLOT(mplabel);
2868 dest = SLOT(vplabel);
2870 biba_copy_effective(source, dest);
2874 biba_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
2875 struct label *dvplabel)
2877 struct mac_biba *subj, *obj;
2882 subj = SLOT(cred->cr_label);
2883 obj = SLOT(dvplabel);
2885 if (!biba_dominate_effective(obj, subj))
2892 biba_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
2893 struct label *dvplabel)
2895 struct mac_biba *subj, *obj;
2900 subj = SLOT(cred->cr_label);
2901 obj = SLOT(dvplabel);
2903 if (!biba_dominate_effective(obj, subj))
2910 biba_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2911 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2913 struct mac_biba *subj, *obj;
2918 subj = SLOT(cred->cr_label);
2919 obj = SLOT(dvplabel);
2921 if (!biba_dominate_effective(subj, obj))
2928 biba_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2929 struct label *vplabel, acl_type_t type)
2931 struct mac_biba *subj, *obj;
2936 subj = SLOT(cred->cr_label);
2937 obj = SLOT(vplabel);
2939 if (!biba_dominate_effective(subj, obj))
2946 biba_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
2947 struct label *vplabel, int attrnamespace, const char *name)
2949 struct mac_biba *subj, *obj;
2954 subj = SLOT(cred->cr_label);
2955 obj = SLOT(vplabel);
2957 if (!biba_dominate_effective(subj, obj))
2964 biba_vnode_check_exec(struct ucred *cred, struct vnode *vp,
2965 struct label *vplabel, struct image_params *imgp,
2966 struct label *execlabel)
2968 struct mac_biba *subj, *obj, *exec;
2971 if (execlabel != NULL) {
2973 * We currently don't permit labels to be changed at
2974 * exec-time as part of Biba, so disallow non-NULL Biba label
2975 * elements in the execlabel.
2977 exec = SLOT(execlabel);
2978 error = biba_atmostflags(exec, 0);
2986 subj = SLOT(cred->cr_label);
2987 obj = SLOT(vplabel);
2989 if (!biba_dominate_effective(obj, subj))
2996 biba_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
2997 struct label *vplabel, acl_type_t type)
2999 struct mac_biba *subj, *obj;
3004 subj = SLOT(cred->cr_label);
3005 obj = SLOT(vplabel);
3007 if (!biba_dominate_effective(obj, subj))
3014 biba_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
3015 struct label *vplabel, int attrnamespace, const char *name)
3017 struct mac_biba *subj, *obj;
3022 subj = SLOT(cred->cr_label);
3023 obj = SLOT(vplabel);
3025 if (!biba_dominate_effective(obj, subj))
3032 biba_vnode_check_link(struct ucred *cred, struct vnode *dvp,
3033 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3034 struct componentname *cnp)
3036 struct mac_biba *subj, *obj;
3041 subj = SLOT(cred->cr_label);
3042 obj = SLOT(dvplabel);
3044 if (!biba_dominate_effective(subj, obj))
3047 obj = SLOT(vplabel);
3049 if (!biba_dominate_effective(subj, obj))
3056 biba_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
3057 struct label *vplabel, int attrnamespace)
3059 struct mac_biba *subj, *obj;
3064 subj = SLOT(cred->cr_label);
3065 obj = SLOT(vplabel);
3067 if (!biba_dominate_effective(obj, subj))
3074 biba_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
3075 struct label *dvplabel, struct componentname *cnp)
3077 struct mac_biba *subj, *obj;
3082 subj = SLOT(cred->cr_label);
3083 obj = SLOT(dvplabel);
3085 if (!biba_dominate_effective(obj, subj))
3092 biba_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
3093 struct label *vplabel, int prot, int flags)
3095 struct mac_biba *subj, *obj;
3098 * Rely on the use of open()-time protections to handle
3099 * non-revocation cases.
3101 if (!biba_enabled || !revocation_enabled)
3104 subj = SLOT(cred->cr_label);
3105 obj = SLOT(vplabel);
3107 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
3108 if (!biba_dominate_effective(obj, subj))
3111 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
3112 if (!biba_dominate_effective(subj, obj))
3120 biba_vnode_check_open(struct ucred *cred, struct vnode *vp,
3121 struct label *vplabel, accmode_t accmode)
3123 struct mac_biba *subj, *obj;
3128 subj = SLOT(cred->cr_label);
3129 obj = SLOT(vplabel);
3131 /* XXX privilege override for admin? */
3132 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
3133 if (!biba_dominate_effective(obj, subj))
3136 if (accmode & VMODIFY_PERMS) {
3137 if (!biba_dominate_effective(subj, obj))
3145 biba_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
3146 struct vnode *vp, struct label *vplabel)
3148 struct mac_biba *subj, *obj;
3150 if (!biba_enabled || !revocation_enabled)
3153 subj = SLOT(active_cred->cr_label);
3154 obj = SLOT(vplabel);
3156 if (!biba_dominate_effective(obj, subj))
3163 biba_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
3164 struct vnode *vp, struct label *vplabel)
3166 struct mac_biba *subj, *obj;
3168 if (!biba_enabled || !revocation_enabled)
3171 subj = SLOT(active_cred->cr_label);
3172 obj = SLOT(vplabel);
3174 if (!biba_dominate_effective(obj, subj))
3181 biba_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
3182 struct label *dvplabel)
3184 struct mac_biba *subj, *obj;
3189 subj = SLOT(cred->cr_label);
3190 obj = SLOT(dvplabel);
3192 if (!biba_dominate_effective(obj, subj))
3199 biba_vnode_check_readlink(struct ucred *cred, struct vnode *vp,
3200 struct label *vplabel)
3202 struct mac_biba *subj, *obj;
3207 subj = SLOT(cred->cr_label);
3208 obj = SLOT(vplabel);
3210 if (!biba_dominate_effective(obj, subj))
3217 biba_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
3218 struct label *vplabel, struct label *newlabel)
3220 struct mac_biba *old, *new, *subj;
3223 old = SLOT(vplabel);
3224 new = SLOT(newlabel);
3225 subj = SLOT(cred->cr_label);
3228 * If there is a Biba label update for the vnode, it must be a
3231 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
3236 * To perform a relabel of the vnode (Biba label or not), Biba must
3237 * authorize the relabel.
3239 if (!biba_effective_in_range(old, subj))
3243 * If the Biba label is to be changed, authorize as appropriate.
3245 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
3247 * To change the Biba label on a vnode, the new vnode label
3248 * must be in the subject range.
3250 if (!biba_effective_in_range(new, subj))
3254 * To change the Biba label on the vnode to be EQUAL, the
3255 * subject must have appropriate privilege.
3257 if (biba_contains_equal(new)) {
3258 error = biba_subject_privileged(subj);
3268 biba_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
3269 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3270 struct componentname *cnp)
3272 struct mac_biba *subj, *obj;
3277 subj = SLOT(cred->cr_label);
3278 obj = SLOT(dvplabel);
3280 if (!biba_dominate_effective(subj, obj))
3283 obj = SLOT(vplabel);
3285 if (!biba_dominate_effective(subj, obj))
3292 biba_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
3293 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3294 int samedir, struct componentname *cnp)
3296 struct mac_biba *subj, *obj;
3301 subj = SLOT(cred->cr_label);
3302 obj = SLOT(dvplabel);
3304 if (!biba_dominate_effective(subj, obj))
3308 obj = SLOT(vplabel);
3310 if (!biba_dominate_effective(subj, obj))
3318 biba_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
3319 struct label *vplabel)
3321 struct mac_biba *subj, *obj;
3326 subj = SLOT(cred->cr_label);
3327 obj = SLOT(vplabel);
3329 if (!biba_dominate_effective(subj, obj))
3336 biba_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
3337 struct label *vplabel, acl_type_t type, struct acl *acl)
3339 struct mac_biba *subj, *obj;
3344 subj = SLOT(cred->cr_label);
3345 obj = SLOT(vplabel);
3347 if (!biba_dominate_effective(subj, obj))
3354 biba_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
3355 struct label *vplabel, int attrnamespace, const char *name)
3357 struct mac_biba *subj, *obj;
3362 subj = SLOT(cred->cr_label);
3363 obj = SLOT(vplabel);
3365 if (!biba_dominate_effective(subj, obj))
3368 /* XXX: protect the MAC EA in a special way? */
3374 biba_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
3375 struct label *vplabel, u_long flags)
3377 struct mac_biba *subj, *obj;
3382 subj = SLOT(cred->cr_label);
3383 obj = SLOT(vplabel);
3385 if (!biba_dominate_effective(subj, obj))
3392 biba_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
3393 struct label *vplabel, mode_t mode)
3395 struct mac_biba *subj, *obj;
3400 subj = SLOT(cred->cr_label);
3401 obj = SLOT(vplabel);
3403 if (!biba_dominate_effective(subj, obj))
3410 biba_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
3411 struct label *vplabel, uid_t uid, gid_t gid)
3413 struct mac_biba *subj, *obj;
3418 subj = SLOT(cred->cr_label);
3419 obj = SLOT(vplabel);
3421 if (!biba_dominate_effective(subj, obj))
3428 biba_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
3429 struct label *vplabel, struct timespec atime, struct timespec mtime)
3431 struct mac_biba *subj, *obj;
3436 subj = SLOT(cred->cr_label);
3437 obj = SLOT(vplabel);
3439 if (!biba_dominate_effective(subj, obj))
3446 biba_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred,
3447 struct vnode *vp, struct label *vplabel)
3449 struct mac_biba *subj, *obj;
3454 subj = SLOT(active_cred->cr_label);
3455 obj = SLOT(vplabel);
3457 if (!biba_dominate_effective(obj, subj))
3464 biba_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
3465 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3466 struct componentname *cnp)
3468 struct mac_biba *subj, *obj;
3473 subj = SLOT(cred->cr_label);
3474 obj = SLOT(dvplabel);
3476 if (!biba_dominate_effective(subj, obj))
3479 obj = SLOT(vplabel);
3481 if (!biba_dominate_effective(subj, obj))
3488 biba_vnode_check_write(struct ucred *active_cred,
3489 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
3491 struct mac_biba *subj, *obj;
3493 if (!biba_enabled || !revocation_enabled)
3496 subj = SLOT(active_cred->cr_label);
3497 obj = SLOT(vplabel);
3499 if (!biba_dominate_effective(subj, obj))
3506 biba_vnode_create_extattr(struct ucred *cred, struct mount *mp,
3507 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
3508 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
3510 struct mac_biba *source, *dest, mb_temp;
3514 buflen = sizeof(mb_temp);
3515 bzero(&mb_temp, buflen);
3517 source = SLOT(cred->cr_label);
3518 dest = SLOT(vplabel);
3519 biba_copy_effective(source, &mb_temp);
3521 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3522 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3524 biba_copy_effective(source, dest);
3529 biba_vnode_relabel(struct ucred *cred, struct vnode *vp,
3530 struct label *vplabel, struct label *newlabel)
3532 struct mac_biba *source, *dest;
3534 source = SLOT(newlabel);
3535 dest = SLOT(vplabel);
3537 biba_copy(source, dest);
3541 biba_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
3542 struct label *vplabel, struct label *intlabel)
3544 struct mac_biba *source, mb_temp;
3548 buflen = sizeof(mb_temp);
3549 bzero(&mb_temp, buflen);
3551 source = SLOT(intlabel);
3552 if ((source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) == 0)
3555 biba_copy_effective(source, &mb_temp);
3557 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3558 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3562 static struct mac_policy_ops mac_biba_ops =
3564 .mpo_init = biba_init,
3566 .mpo_bpfdesc_check_receive = biba_bpfdesc_check_receive,
3567 .mpo_bpfdesc_create = biba_bpfdesc_create,
3568 .mpo_bpfdesc_create_mbuf = biba_bpfdesc_create_mbuf,
3569 .mpo_bpfdesc_destroy_label = biba_destroy_label,
3570 .mpo_bpfdesc_init_label = biba_init_label,
3572 .mpo_cred_associate_nfsd = biba_cred_associate_nfsd,
3573 .mpo_cred_check_relabel = biba_cred_check_relabel,
3574 .mpo_cred_check_visible = biba_cred_check_visible,
3575 .mpo_cred_copy_label = biba_copy_label,
3576 .mpo_cred_create_init = biba_cred_create_init,
3577 .mpo_cred_create_swapper = biba_cred_create_swapper,
3578 .mpo_cred_destroy_label = biba_destroy_label,
3579 .mpo_cred_externalize_label = biba_externalize_label,
3580 .mpo_cred_init_label = biba_init_label,
3581 .mpo_cred_internalize_label = biba_internalize_label,
3582 .mpo_cred_relabel = biba_cred_relabel,
3584 .mpo_devfs_create_device = biba_devfs_create_device,
3585 .mpo_devfs_create_directory = biba_devfs_create_directory,
3586 .mpo_devfs_create_symlink = biba_devfs_create_symlink,
3587 .mpo_devfs_destroy_label = biba_destroy_label,
3588 .mpo_devfs_init_label = biba_init_label,
3589 .mpo_devfs_update = biba_devfs_update,
3590 .mpo_devfs_vnode_associate = biba_devfs_vnode_associate,
3592 .mpo_ifnet_check_relabel = biba_ifnet_check_relabel,
3593 .mpo_ifnet_check_transmit = biba_ifnet_check_transmit,
3594 .mpo_ifnet_copy_label = biba_copy_label,
3595 .mpo_ifnet_create = biba_ifnet_create,
3596 .mpo_ifnet_create_mbuf = biba_ifnet_create_mbuf,
3597 .mpo_ifnet_destroy_label = biba_destroy_label,
3598 .mpo_ifnet_externalize_label = biba_externalize_label,
3599 .mpo_ifnet_init_label = biba_init_label,
3600 .mpo_ifnet_internalize_label = biba_internalize_label,
3601 .mpo_ifnet_relabel = biba_ifnet_relabel,
3603 .mpo_inpcb_check_deliver = biba_inpcb_check_deliver,
3604 .mpo_inpcb_check_visible = biba_inpcb_check_visible,
3605 .mpo_inpcb_create = biba_inpcb_create,
3606 .mpo_inpcb_create_mbuf = biba_inpcb_create_mbuf,
3607 .mpo_inpcb_destroy_label = biba_destroy_label,
3608 .mpo_inpcb_init_label = biba_init_label_waitcheck,
3609 .mpo_inpcb_sosetlabel = biba_inpcb_sosetlabel,
3611 .mpo_ip6q_create = biba_ip6q_create,
3612 .mpo_ip6q_destroy_label = biba_destroy_label,
3613 .mpo_ip6q_init_label = biba_init_label_waitcheck,
3614 .mpo_ip6q_match = biba_ip6q_match,
3615 .mpo_ip6q_reassemble = biba_ip6q_reassemble,
3616 .mpo_ip6q_update = biba_ip6q_update,
3618 .mpo_ipq_create = biba_ipq_create,
3619 .mpo_ipq_destroy_label = biba_destroy_label,
3620 .mpo_ipq_init_label = biba_init_label_waitcheck,
3621 .mpo_ipq_match = biba_ipq_match,
3622 .mpo_ipq_reassemble = biba_ipq_reassemble,
3623 .mpo_ipq_update = biba_ipq_update,
3625 .mpo_kld_check_load = biba_kld_check_load,
3627 .mpo_mbuf_copy_label = biba_copy_label,
3628 .mpo_mbuf_destroy_label = biba_destroy_label,
3629 .mpo_mbuf_init_label = biba_init_label_waitcheck,
3631 .mpo_mount_check_stat = biba_mount_check_stat,
3632 .mpo_mount_create = biba_mount_create,
3633 .mpo_mount_destroy_label = biba_destroy_label,
3634 .mpo_mount_init_label = biba_init_label,
3636 .mpo_netinet_arp_send = biba_netinet_arp_send,
3637 .mpo_netinet_firewall_reply = biba_netinet_firewall_reply,
3638 .mpo_netinet_firewall_send = biba_netinet_firewall_send,
3639 .mpo_netinet_fragment = biba_netinet_fragment,
3640 .mpo_netinet_icmp_reply = biba_netinet_icmp_reply,
3641 .mpo_netinet_igmp_send = biba_netinet_igmp_send,
3643 .mpo_netinet6_nd6_send = biba_netinet6_nd6_send,
3645 .mpo_pipe_check_ioctl = biba_pipe_check_ioctl,
3646 .mpo_pipe_check_poll = biba_pipe_check_poll,
3647 .mpo_pipe_check_read = biba_pipe_check_read,
3648 .mpo_pipe_check_relabel = biba_pipe_check_relabel,
3649 .mpo_pipe_check_stat = biba_pipe_check_stat,
3650 .mpo_pipe_check_write = biba_pipe_check_write,
3651 .mpo_pipe_copy_label = biba_copy_label,
3652 .mpo_pipe_create = biba_pipe_create,
3653 .mpo_pipe_destroy_label = biba_destroy_label,
3654 .mpo_pipe_externalize_label = biba_externalize_label,
3655 .mpo_pipe_init_label = biba_init_label,
3656 .mpo_pipe_internalize_label = biba_internalize_label,
3657 .mpo_pipe_relabel = biba_pipe_relabel,
3659 .mpo_posixsem_check_getvalue = biba_posixsem_check_rdonly,
3660 .mpo_posixsem_check_open = biba_posixsem_check_openunlink,
3661 .mpo_posixsem_check_post = biba_posixsem_check_write,
3662 .mpo_posixsem_check_setmode = biba_posixsem_check_setmode,
3663 .mpo_posixsem_check_setowner = biba_posixsem_check_setowner,
3664 .mpo_posixsem_check_stat = biba_posixsem_check_rdonly,
3665 .mpo_posixsem_check_unlink = biba_posixsem_check_openunlink,
3666 .mpo_posixsem_check_wait = biba_posixsem_check_write,
3667 .mpo_posixsem_create = biba_posixsem_create,
3668 .mpo_posixsem_destroy_label = biba_destroy_label,
3669 .mpo_posixsem_init_label = biba_init_label,
3671 .mpo_posixshm_check_mmap = biba_posixshm_check_mmap,
3672 .mpo_posixshm_check_open = biba_posixshm_check_open,
3673 .mpo_posixshm_check_read = biba_posixshm_check_read,
3674 .mpo_posixshm_check_setmode = biba_posixshm_check_setmode,
3675 .mpo_posixshm_check_setowner = biba_posixshm_check_setowner,
3676 .mpo_posixshm_check_stat = biba_posixshm_check_stat,
3677 .mpo_posixshm_check_truncate = biba_posixshm_check_truncate,
3678 .mpo_posixshm_check_unlink = biba_posixshm_check_unlink,
3679 .mpo_posixshm_check_write = biba_posixshm_check_write,
3680 .mpo_posixshm_create = biba_posixshm_create,
3681 .mpo_posixshm_destroy_label = biba_destroy_label,
3682 .mpo_posixshm_init_label = biba_init_label,
3684 .mpo_priv_check = biba_priv_check,
3686 .mpo_proc_check_debug = biba_proc_check_debug,
3687 .mpo_proc_check_sched = biba_proc_check_sched,
3688 .mpo_proc_check_signal = biba_proc_check_signal,
3690 .mpo_socket_check_deliver = biba_socket_check_deliver,
3691 .mpo_socket_check_relabel = biba_socket_check_relabel,
3692 .mpo_socket_check_visible = biba_socket_check_visible,
3693 .mpo_socket_copy_label = biba_copy_label,
3694 .mpo_socket_create = biba_socket_create,
3695 .mpo_socket_create_mbuf = biba_socket_create_mbuf,
3696 .mpo_socket_destroy_label = biba_destroy_label,
3697 .mpo_socket_externalize_label = biba_externalize_label,
3698 .mpo_socket_init_label = biba_init_label_waitcheck,
3699 .mpo_socket_internalize_label = biba_internalize_label,
3700 .mpo_socket_newconn = biba_socket_newconn,
3701 .mpo_socket_relabel = biba_socket_relabel,
3703 .mpo_socketpeer_destroy_label = biba_destroy_label,
3704 .mpo_socketpeer_externalize_label = biba_externalize_label,
3705 .mpo_socketpeer_init_label = biba_init_label_waitcheck,
3706 .mpo_socketpeer_set_from_mbuf = biba_socketpeer_set_from_mbuf,
3707 .mpo_socketpeer_set_from_socket = biba_socketpeer_set_from_socket,
3709 .mpo_syncache_create = biba_syncache_create,
3710 .mpo_syncache_create_mbuf = biba_syncache_create_mbuf,
3711 .mpo_syncache_destroy_label = biba_destroy_label,
3712 .mpo_syncache_init_label = biba_init_label_waitcheck,
3714 .mpo_system_check_acct = biba_system_check_acct,
3715 .mpo_system_check_auditctl = biba_system_check_auditctl,
3716 .mpo_system_check_auditon = biba_system_check_auditon,
3717 .mpo_system_check_swapoff = biba_system_check_swapoff,
3718 .mpo_system_check_swapon = biba_system_check_swapon,
3719 .mpo_system_check_sysctl = biba_system_check_sysctl,
3721 .mpo_sysvmsg_cleanup = biba_sysvmsg_cleanup,
3722 .mpo_sysvmsg_create = biba_sysvmsg_create,
3723 .mpo_sysvmsg_destroy_label = biba_destroy_label,
3724 .mpo_sysvmsg_init_label = biba_init_label,
3726 .mpo_sysvmsq_check_msgrcv = biba_sysvmsq_check_msgrcv,
3727 .mpo_sysvmsq_check_msgrmid = biba_sysvmsq_check_msgrmid,
3728 .mpo_sysvmsq_check_msqget = biba_sysvmsq_check_msqget,
3729 .mpo_sysvmsq_check_msqsnd = biba_sysvmsq_check_msqsnd,
3730 .mpo_sysvmsq_check_msqrcv = biba_sysvmsq_check_msqrcv,
3731 .mpo_sysvmsq_check_msqctl = biba_sysvmsq_check_msqctl,
3732 .mpo_sysvmsq_cleanup = biba_sysvmsq_cleanup,
3733 .mpo_sysvmsq_create = biba_sysvmsq_create,
3734 .mpo_sysvmsq_destroy_label = biba_destroy_label,
3735 .mpo_sysvmsq_init_label = biba_init_label,
3737 .mpo_sysvsem_check_semctl = biba_sysvsem_check_semctl,
3738 .mpo_sysvsem_check_semget = biba_sysvsem_check_semget,
3739 .mpo_sysvsem_check_semop = biba_sysvsem_check_semop,
3740 .mpo_sysvsem_cleanup = biba_sysvsem_cleanup,
3741 .mpo_sysvsem_create = biba_sysvsem_create,
3742 .mpo_sysvsem_destroy_label = biba_destroy_label,
3743 .mpo_sysvsem_init_label = biba_init_label,
3745 .mpo_sysvshm_check_shmat = biba_sysvshm_check_shmat,
3746 .mpo_sysvshm_check_shmctl = biba_sysvshm_check_shmctl,
3747 .mpo_sysvshm_check_shmget = biba_sysvshm_check_shmget,
3748 .mpo_sysvshm_cleanup = biba_sysvshm_cleanup,
3749 .mpo_sysvshm_create = biba_sysvshm_create,
3750 .mpo_sysvshm_destroy_label = biba_destroy_label,
3751 .mpo_sysvshm_init_label = biba_init_label,
3753 .mpo_vnode_associate_extattr = biba_vnode_associate_extattr,
3754 .mpo_vnode_associate_singlelabel = biba_vnode_associate_singlelabel,
3755 .mpo_vnode_check_access = biba_vnode_check_open,
3756 .mpo_vnode_check_chdir = biba_vnode_check_chdir,
3757 .mpo_vnode_check_chroot = biba_vnode_check_chroot,
3758 .mpo_vnode_check_create = biba_vnode_check_create,
3759 .mpo_vnode_check_deleteacl = biba_vnode_check_deleteacl,
3760 .mpo_vnode_check_deleteextattr = biba_vnode_check_deleteextattr,
3761 .mpo_vnode_check_exec = biba_vnode_check_exec,
3762 .mpo_vnode_check_getacl = biba_vnode_check_getacl,
3763 .mpo_vnode_check_getextattr = biba_vnode_check_getextattr,
3764 .mpo_vnode_check_link = biba_vnode_check_link,
3765 .mpo_vnode_check_listextattr = biba_vnode_check_listextattr,
3766 .mpo_vnode_check_lookup = biba_vnode_check_lookup,
3767 .mpo_vnode_check_mmap = biba_vnode_check_mmap,
3768 .mpo_vnode_check_open = biba_vnode_check_open,
3769 .mpo_vnode_check_poll = biba_vnode_check_poll,
3770 .mpo_vnode_check_read = biba_vnode_check_read,
3771 .mpo_vnode_check_readdir = biba_vnode_check_readdir,
3772 .mpo_vnode_check_readlink = biba_vnode_check_readlink,
3773 .mpo_vnode_check_relabel = biba_vnode_check_relabel,
3774 .mpo_vnode_check_rename_from = biba_vnode_check_rename_from,
3775 .mpo_vnode_check_rename_to = biba_vnode_check_rename_to,
3776 .mpo_vnode_check_revoke = biba_vnode_check_revoke,
3777 .mpo_vnode_check_setacl = biba_vnode_check_setacl,
3778 .mpo_vnode_check_setextattr = biba_vnode_check_setextattr,
3779 .mpo_vnode_check_setflags = biba_vnode_check_setflags,
3780 .mpo_vnode_check_setmode = biba_vnode_check_setmode,
3781 .mpo_vnode_check_setowner = biba_vnode_check_setowner,
3782 .mpo_vnode_check_setutimes = biba_vnode_check_setutimes,
3783 .mpo_vnode_check_stat = biba_vnode_check_stat,
3784 .mpo_vnode_check_unlink = biba_vnode_check_unlink,
3785 .mpo_vnode_check_write = biba_vnode_check_write,
3786 .mpo_vnode_create_extattr = biba_vnode_create_extattr,
3787 .mpo_vnode_copy_label = biba_copy_label,
3788 .mpo_vnode_destroy_label = biba_destroy_label,
3789 .mpo_vnode_externalize_label = biba_externalize_label,
3790 .mpo_vnode_init_label = biba_init_label,
3791 .mpo_vnode_internalize_label = biba_internalize_label,
3792 .mpo_vnode_relabel = biba_vnode_relabel,
3793 .mpo_vnode_setlabel_extattr = biba_vnode_setlabel_extattr,
3796 MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
3797 MPC_LOADTIME_FLAG_NOTLATE, &biba_slot);