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_RW, &biba_enabled,
104 0, "Enforce MAC/Biba policy");
105 TUNABLE_INT("security.mac.biba.enabled", &biba_enabled);
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");
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);
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));
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");
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);
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);
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);
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))
145 static uma_zone_t zone_biba;
148 biba_bit_set_empty(u_char *set) {
151 for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
157 static struct mac_biba *
161 return (uma_zalloc(zone_biba, flag | M_ZERO));
165 biba_free(struct mac_biba *mb)
169 uma_zfree(zone_biba, mb);
171 atomic_add_int(&destroyed_not_inited, 1);
175 biba_atmostflags(struct mac_biba *mb, int flags)
178 if ((mb->mb_flags & flags) != mb->mb_flags)
184 biba_dominate_element(struct mac_biba_element *a, struct mac_biba_element *b)
188 switch (a->mbe_type) {
189 case MAC_BIBA_TYPE_EQUAL:
190 case MAC_BIBA_TYPE_HIGH:
193 case MAC_BIBA_TYPE_LOW:
194 switch (b->mbe_type) {
195 case MAC_BIBA_TYPE_GRADE:
196 case MAC_BIBA_TYPE_HIGH:
199 case MAC_BIBA_TYPE_EQUAL:
200 case MAC_BIBA_TYPE_LOW:
204 panic("biba_dominate_element: b->mbe_type invalid");
207 case MAC_BIBA_TYPE_GRADE:
208 switch (b->mbe_type) {
209 case MAC_BIBA_TYPE_EQUAL:
210 case MAC_BIBA_TYPE_LOW:
213 case MAC_BIBA_TYPE_HIGH:
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))
222 return (a->mbe_grade >= b->mbe_grade);
225 panic("biba_dominate_element: b->mbe_type invalid");
229 panic("biba_dominate_element: a->mbe_type invalid");
236 biba_subject_dominate_high(struct mac_biba *mb)
238 struct mac_biba_element *element;
240 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
241 ("biba_effective_in_range: mb not effective"));
242 element = &mb->mb_effective;
244 return (element->mbe_type == MAC_BIBA_TYPE_EQUAL ||
245 element->mbe_type == MAC_BIBA_TYPE_HIGH);
249 biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
252 return (biba_dominate_element(&rangeb->mb_rangehigh,
253 &rangea->mb_rangehigh) &&
254 biba_dominate_element(&rangea->mb_rangelow,
255 &rangeb->mb_rangelow));
259 biba_effective_in_range(struct mac_biba *effective, struct mac_biba *range)
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"));
267 return (biba_dominate_element(&range->mb_rangehigh,
268 &effective->mb_effective) &&
269 biba_dominate_element(&effective->mb_effective,
270 &range->mb_rangelow));
276 biba_dominate_effective(struct mac_biba *a, struct mac_biba *b)
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"));
283 return (biba_dominate_element(&a->mb_effective, &b->mb_effective));
287 biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
290 if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
291 b->mbe_type == MAC_BIBA_TYPE_EQUAL)
294 return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
298 biba_equal_effective(struct mac_biba *a, struct mac_biba *b)
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"));
306 return (biba_equal_element(&a->mb_effective, &b->mb_effective));
310 biba_contains_equal(struct mac_biba *mb)
313 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
314 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
318 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
319 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
321 if (mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
329 biba_subject_privileged(struct mac_biba *mb)
332 KASSERT((mb->mb_flags & MAC_BIBA_FLAGS_BOTH) == MAC_BIBA_FLAGS_BOTH,
333 ("biba_subject_privileged: subject doesn't have both labels"));
335 /* If the effective is EQUAL, it's ok. */
336 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
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)
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)
354 biba_high_effective(struct mac_biba *mb)
357 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
358 ("biba_equal_effective: mb not effective"));
360 return (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_HIGH);
364 biba_valid(struct mac_biba *mb)
367 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
368 switch (mb->mb_effective.mbe_type) {
369 case MAC_BIBA_TYPE_GRADE:
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))
385 if (mb->mb_effective.mbe_type != MAC_BIBA_TYPE_UNDEF)
389 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
390 switch (mb->mb_rangelow.mbe_type) {
391 case MAC_BIBA_TYPE_GRADE:
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))
407 switch (mb->mb_rangehigh.mbe_type) {
408 case MAC_BIBA_TYPE_GRADE:
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))
423 if (!biba_dominate_element(&mb->mb_rangehigh,
427 if (mb->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
428 mb->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
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)
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;
455 biba_set_effective(struct mac_biba *mb, u_short type, u_short grade,
456 u_char *compartments)
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;
468 biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
471 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
472 ("biba_copy_range: labelfrom not range"));
474 labelto->mb_rangelow = labelfrom->mb_rangelow;
475 labelto->mb_rangehigh = labelfrom->mb_rangehigh;
476 labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
480 biba_copy_effective(struct mac_biba *labelfrom, struct mac_biba *labelto)
483 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
484 ("biba_copy_effective: labelfrom not effective"));
486 labelto->mb_effective = labelfrom->mb_effective;
487 labelto->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
491 biba_copy(struct mac_biba *source, struct mac_biba *dest)
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);
501 * Policy module operations.
504 biba_init(struct mac_policy_conf *conf)
507 zone_biba = uma_zcreate("mac_biba", sizeof(struct mac_biba), NULL,
508 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
515 biba_init_label(struct label *label)
518 SLOT_SET(label, biba_alloc(M_WAITOK));
522 biba_init_label_waitcheck(struct label *label, int flag)
525 SLOT_SET(label, biba_alloc(flag));
526 if (SLOT(label) == NULL)
533 biba_destroy_label(struct label *label)
536 biba_free(SLOT(label));
537 SLOT_SET(label, NULL);
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.
546 biba_element_to_string(struct sbuf *sb, struct mac_biba_element *element)
550 switch (element->mbe_type) {
551 case MAC_BIBA_TYPE_HIGH:
552 return (sbuf_printf(sb, "high"));
554 case MAC_BIBA_TYPE_LOW:
555 return (sbuf_printf(sb, "low"));
557 case MAC_BIBA_TYPE_EQUAL:
558 return (sbuf_printf(sb, "equal"));
560 case MAC_BIBA_TYPE_GRADE:
561 if (sbuf_printf(sb, "%d", element->mbe_grade) == -1)
565 for (i = 1; i <= MAC_BIBA_MAX_COMPARTMENTS; i++) {
566 if (MAC_BIBA_BIT_TEST(i, element->mbe_compartments)) {
568 if (sbuf_putc(sb, ':') == -1)
570 if (sbuf_printf(sb, "%d", i) == -1)
574 if (sbuf_printf(sb, "+%d", i) == -1)
582 panic("biba_element_to_string: invalid type (%d)",
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
595 biba_to_string(struct sbuf *sb, struct mac_biba *mb)
598 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
599 if (biba_element_to_string(sb, &mb->mb_effective) == -1)
603 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
604 if (sbuf_putc(sb, '(') == -1)
607 if (biba_element_to_string(sb, &mb->mb_rangelow) == -1)
610 if (sbuf_putc(sb, '-') == -1)
613 if (biba_element_to_string(sb, &mb->mb_rangehigh) == -1)
616 if (sbuf_putc(sb, ')') == -1)
624 biba_externalize_label(struct label *label, char *element_name,
625 struct sbuf *sb, int *claimed)
629 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
635 return (biba_to_string(sb, mb));
639 biba_parse_element(struct mac_biba_element *element, char *string)
641 char *compartment, *end, *grade;
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;
655 element->mbe_type = MAC_BIBA_TYPE_GRADE;
658 * Numeric grade piece of the element.
660 grade = strsep(&string, ":");
661 value = strtol(grade, &end, 10);
662 if (end == grade || *end != '\0')
664 if (value < 0 || value > 65535)
666 element->mbe_grade = value;
669 * Optional compartment piece of the element. If none are
670 * included, we assume that the label has no compartments.
677 while ((compartment = strsep(&string, "+")) != NULL) {
678 value = strtol(compartment, &end, 10);
679 if (compartment == end || *end != '\0')
681 if (value < 1 || value > MAC_BIBA_MAX_COMPARTMENTS)
683 MAC_BIBA_BIT_SET(value, element->mbe_compartments);
691 * Note: destructively consumes the string, make a local copy before calling
692 * if that's a problem.
695 biba_parse(struct mac_biba *mb, char *string)
697 char *rangehigh, *rangelow, *effective;
700 effective = strsep(&string, "(");
701 if (*effective == '\0')
704 if (string != NULL) {
705 rangelow = strsep(&string, "-");
708 rangehigh = strsep(&string, ")");
718 KASSERT((rangelow != NULL && rangehigh != NULL) ||
719 (rangelow == NULL && rangehigh == NULL),
720 ("biba_parse: range mismatch"));
722 bzero(mb, sizeof(*mb));
723 if (effective != NULL) {
724 error = biba_parse_element(&mb->mb_effective, effective);
727 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
730 if (rangelow != NULL) {
731 error = biba_parse_element(&mb->mb_rangelow, rangelow);
734 error = biba_parse_element(&mb->mb_rangehigh, rangehigh);
737 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
740 error = biba_valid(mb);
748 biba_internalize_label(struct label *label, char *element_name,
749 char *element_data, int *claimed)
751 struct mac_biba *mb, mb_temp;
754 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
759 error = biba_parse(&mb_temp, element_data);
770 biba_copy_label(struct label *src, struct label *dest)
773 *SLOT(dest) = *SLOT(src);
777 * Object-specific entry point implementations are sorted alphabetically by
778 * object type name and then by operation.
781 biba_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
782 struct ifnet *ifp, struct label *ifplabel)
784 struct mac_biba *a, *b;
792 if (biba_equal_effective(a, b))
798 biba_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
799 struct label *dlabel)
801 struct mac_biba *source, *dest;
803 source = SLOT(cred->cr_label);
806 biba_copy_effective(source, dest);
810 biba_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
811 struct mbuf *m, struct label *mlabel)
813 struct mac_biba *source, *dest;
815 source = SLOT(dlabel);
818 biba_copy_effective(source, dest);
822 biba_cred_associate_nfsd(struct ucred *cred)
824 struct mac_biba *label;
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,
833 biba_cred_check_relabel(struct ucred *cred, struct label *newlabel)
835 struct mac_biba *subj, *new;
838 subj = SLOT(cred->cr_label);
839 new = SLOT(newlabel);
842 * If there is a Biba label update for the credential, it may
843 * be an update of the effective, range, or both.
845 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
850 * If the Biba label is to be changed, authorize as appropriate.
852 if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
854 * If the change request modifies both the Biba label
855 * effective and range, check that the new effective will be
858 if ((new->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
859 MAC_BIBA_FLAGS_BOTH &&
860 !biba_effective_in_range(new, new))
864 * To change the Biba effective label on a credential, the
865 * new effective label must be in the current range.
867 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE &&
868 !biba_effective_in_range(new, subj))
872 * To change the Biba range on a credential, the new range
873 * label must be in the current range.
875 if (new->mb_flags & MAC_BIBA_FLAG_RANGE &&
876 !biba_range_in_range(new, subj))
880 * To have EQUAL in any component of the new credential Biba
881 * label, the subject must already have EQUAL in their label.
883 if (biba_contains_equal(new)) {
884 error = biba_subject_privileged(subj);
894 biba_cred_check_visible(struct ucred *u1, struct ucred *u2)
896 struct mac_biba *subj, *obj;
901 subj = SLOT(u1->cr_label);
902 obj = SLOT(u2->cr_label);
905 if (!biba_dominate_effective(obj, subj))
912 biba_cred_create_init(struct ucred *cred)
914 struct mac_biba *dest;
916 dest = SLOT(cred->cr_label);
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,
924 biba_cred_create_swapper(struct ucred *cred)
926 struct mac_biba *dest;
928 dest = SLOT(cred->cr_label);
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,
936 biba_cred_relabel(struct ucred *cred, struct label *newlabel)
938 struct mac_biba *source, *dest;
940 source = SLOT(newlabel);
941 dest = SLOT(cred->cr_label);
943 biba_copy(source, dest);
947 biba_devfs_create_device(struct ucred *cred, struct mount *mp,
948 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
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;
967 biba_type = MAC_BIBA_TYPE_HIGH;
968 biba_set_effective(mb, biba_type, 0, NULL);
972 biba_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
973 struct devfs_dirent *de, struct label *delabel)
979 biba_set_effective(mb, MAC_BIBA_TYPE_HIGH, 0, NULL);
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)
987 struct mac_biba *source, *dest;
989 source = SLOT(cred->cr_label);
990 dest = SLOT(delabel);
992 biba_copy_effective(source, dest);
996 biba_devfs_update(struct mount *mp, struct devfs_dirent *de,
997 struct label *delabel, struct vnode *vp, struct label *vplabel)
999 struct mac_biba *source, *dest;
1001 source = SLOT(vplabel);
1002 dest = SLOT(delabel);
1004 biba_copy(source, dest);
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)
1012 struct mac_biba *source, *dest;
1014 source = SLOT(delabel);
1015 dest = SLOT(vplabel);
1017 biba_copy_effective(source, dest);
1021 biba_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1022 struct label *ifplabel, struct label *newlabel)
1024 struct mac_biba *subj, *new;
1027 subj = SLOT(cred->cr_label);
1028 new = SLOT(newlabel);
1031 * If there is a Biba label update for the interface, it may be an
1032 * update of the effective, range, or both.
1034 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
1039 * Relabling network interfaces requires Biba privilege.
1041 error = biba_subject_privileged(subj);
1049 biba_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1050 struct mbuf *m, struct label *mlabel)
1052 struct mac_biba *p, *i;
1060 return (biba_effective_in_range(p, i) ? 0 : EACCES);
1064 biba_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1066 char tifname[IFNAMSIZ], *p, *q;
1067 char tiflist[sizeof(trusted_interfaces)];
1068 struct mac_biba *dest;
1071 dest = SLOT(ifplabel);
1073 if (ifp->if_type == IFT_LOOP || interfaces_equal != 0) {
1074 type = MAC_BIBA_TYPE_EQUAL;
1078 if (trust_all_interfaces) {
1079 type = MAC_BIBA_TYPE_HIGH;
1083 type = MAC_BIBA_TYPE_LOW;
1085 if (trusted_interfaces[0] == '\0' ||
1086 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1089 bzero(tiflist, sizeof(tiflist));
1090 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1091 if(*p != ' ' && *p != '\t')
1094 for (p = q = tiflist;; p++) {
1095 if (*p == ',' || *p == '\0') {
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;
1106 printf("mac_biba warning: interface name "
1107 "\"%s\" is too long (must be < %d)\n",
1116 biba_set_effective(dest, type, 0, NULL);
1117 biba_set_range(dest, type, 0, NULL, type, 0, NULL);
1121 biba_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1122 struct mbuf *m, struct label *mlabel)
1124 struct mac_biba *source, *dest;
1126 source = SLOT(ifplabel);
1127 dest = SLOT(mlabel);
1129 biba_copy_effective(source, dest);
1133 biba_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1134 struct label *ifplabel, struct label *newlabel)
1136 struct mac_biba *source, *dest;
1138 source = SLOT(newlabel);
1139 dest = SLOT(ifplabel);
1141 biba_copy(source, dest);
1145 biba_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1146 struct mbuf *m, struct label *mlabel)
1148 struct mac_biba *p, *i;
1156 return (biba_equal_effective(p, i) ? 0 : EACCES);
1160 biba_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1161 struct label *inplabel)
1163 struct mac_biba *subj, *obj;
1168 subj = SLOT(cred->cr_label);
1169 obj = SLOT(inplabel);
1171 if (!biba_dominate_effective(obj, subj))
1178 biba_inpcb_create(struct socket *so, struct label *solabel,
1179 struct inpcb *inp, struct label *inplabel)
1181 struct mac_biba *source, *dest;
1183 source = SLOT(solabel);
1184 dest = SLOT(inplabel);
1187 biba_copy_effective(source, dest);
1192 biba_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1193 struct mbuf *m, struct label *mlabel)
1195 struct mac_biba *source, *dest;
1197 source = SLOT(inplabel);
1198 dest = SLOT(mlabel);
1200 biba_copy_effective(source, dest);
1204 biba_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1205 struct inpcb *inp, struct label *inplabel)
1207 struct mac_biba *source, *dest;
1209 SOCK_LOCK_ASSERT(so);
1211 source = SLOT(solabel);
1212 dest = SLOT(inplabel);
1214 biba_copy(source, dest);
1218 biba_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1219 struct label *q6label)
1221 struct mac_biba *source, *dest;
1223 source = SLOT(mlabel);
1224 dest = SLOT(q6label);
1226 biba_copy_effective(source, dest);
1230 biba_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1231 struct label *q6label)
1233 struct mac_biba *a, *b;
1238 return (biba_equal_effective(a, b));
1242 biba_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1243 struct label *mlabel)
1245 struct mac_biba *source, *dest;
1247 source = SLOT(q6label);
1248 dest = SLOT(mlabel);
1250 /* Just use the head, since we require them all to match. */
1251 biba_copy_effective(source, dest);
1255 biba_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1256 struct label *q6label)
1259 /* NOOP: we only accept matching labels, so no need to update */
1263 biba_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1264 struct label *qlabel)
1266 struct mac_biba *source, *dest;
1268 source = SLOT(mlabel);
1269 dest = SLOT(qlabel);
1271 biba_copy_effective(source, dest);
1275 biba_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1276 struct label *qlabel)
1278 struct mac_biba *a, *b;
1283 return (biba_equal_effective(a, b));
1287 biba_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1288 struct label *mlabel)
1290 struct mac_biba *source, *dest;
1292 source = SLOT(qlabel);
1293 dest = SLOT(mlabel);
1295 /* Just use the head, since we require them all to match. */
1296 biba_copy_effective(source, dest);
1300 biba_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1301 struct label *qlabel)
1304 /* NOOP: we only accept matching labels, so no need to update */
1308 biba_kld_check_load(struct ucred *cred, struct vnode *vp,
1309 struct label *vplabel)
1311 struct mac_biba *subj, *obj;
1317 subj = SLOT(cred->cr_label);
1319 error = biba_subject_privileged(subj);
1323 obj = SLOT(vplabel);
1324 if (!biba_high_effective(obj))
1331 biba_mount_check_stat(struct ucred *cred, struct mount *mp,
1332 struct label *mplabel)
1334 struct mac_biba *subj, *obj;
1339 subj = SLOT(cred->cr_label);
1340 obj = SLOT(mplabel);
1342 if (!biba_dominate_effective(obj, subj))
1349 biba_mount_create(struct ucred *cred, struct mount *mp,
1350 struct label *mplabel)
1352 struct mac_biba *source, *dest;
1354 source = SLOT(cred->cr_label);
1355 dest = SLOT(mplabel);
1357 biba_copy_effective(source, dest);
1361 biba_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel,
1362 struct mbuf *m, struct label *mlabel)
1364 struct mac_biba *dest;
1366 dest = SLOT(mlabel);
1368 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1372 biba_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1373 struct mbuf *m, struct label *mlabel)
1375 struct mac_biba *dest;
1377 dest = SLOT(mlabel);
1379 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1383 biba_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1384 struct mbuf *msend, struct label *msendlabel)
1386 struct mac_biba *source, *dest;
1388 source = SLOT(mrecvlabel);
1389 dest = SLOT(msendlabel);
1391 biba_copy_effective(source, dest);
1395 biba_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1397 struct mac_biba *dest;
1399 dest = SLOT(mlabel);
1401 /* XXX: where is the label for the firewall really coming from? */
1402 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1406 biba_netinet_fragment(struct mbuf *m, struct label *mlabel,
1407 struct mbuf *frag, struct label *fraglabel)
1409 struct mac_biba *source, *dest;
1411 source = SLOT(mlabel);
1412 dest = SLOT(fraglabel);
1414 biba_copy_effective(source, dest);
1418 biba_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1419 struct mbuf *msend, struct label *msendlabel)
1421 struct mac_biba *source, *dest;
1423 source = SLOT(mrecvlabel);
1424 dest = SLOT(msendlabel);
1426 biba_copy_effective(source, dest);
1430 biba_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1431 struct mbuf *m, struct label *mlabel)
1433 struct mac_biba *dest;
1435 dest = SLOT(mlabel);
1437 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1441 biba_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1442 struct mbuf *m, struct label *mlabel)
1444 struct mac_biba *dest;
1446 dest = SLOT(mlabel);
1448 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1452 biba_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1453 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1459 /* XXX: This will be implemented soon... */
1465 biba_pipe_check_poll(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_read(struct ucred *cred, struct pipepair *pp,
1484 struct label *pplabel)
1486 struct mac_biba *subj, *obj;
1491 subj = SLOT(cred->cr_label);
1492 obj = SLOT(pplabel);
1494 if (!biba_dominate_effective(obj, subj))
1501 biba_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1502 struct label *pplabel, struct label *newlabel)
1504 struct mac_biba *subj, *obj, *new;
1507 new = SLOT(newlabel);
1508 subj = SLOT(cred->cr_label);
1509 obj = SLOT(pplabel);
1512 * If there is a Biba label update for a pipe, it must be a effective
1515 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
1520 * To perform a relabel of a pipe (Biba label or not), Biba must
1521 * authorize the relabel.
1523 if (!biba_effective_in_range(obj, subj))
1527 * If the Biba label is to be changed, authorize as appropriate.
1529 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
1531 * To change the Biba label on a pipe, the new pipe label
1532 * must be in the subject range.
1534 if (!biba_effective_in_range(new, subj))
1538 * To change the Biba label on a pipe to be EQUAL, the
1539 * subject must have appropriate privilege.
1541 if (biba_contains_equal(new)) {
1542 error = biba_subject_privileged(subj);
1552 biba_pipe_check_stat(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(obj, subj))
1570 biba_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1571 struct label *pplabel)
1573 struct mac_biba *subj, *obj;
1578 subj = SLOT(cred->cr_label);
1579 obj = SLOT(pplabel);
1581 if (!biba_dominate_effective(subj, obj))
1588 biba_pipe_create(struct ucred *cred, struct pipepair *pp,
1589 struct label *pplabel)
1591 struct mac_biba *source, *dest;
1593 source = SLOT(cred->cr_label);
1594 dest = SLOT(pplabel);
1596 biba_copy_effective(source, dest);
1600 biba_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1601 struct label *pplabel, struct label *newlabel)
1603 struct mac_biba *source, *dest;
1605 source = SLOT(newlabel);
1606 dest = SLOT(pplabel);
1608 biba_copy(source, dest);
1612 biba_posixsem_check_openunlink(struct ucred *cred, struct ksem *ks,
1613 struct label *kslabel)
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_setmode(struct ucred *cred, struct ksem *ks,
1631 struct label *kslabel, mode_t mode)
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_setowner(struct ucred *cred, struct ksem *ks,
1649 struct label *kslabel, uid_t uid, gid_t gid)
1651 struct mac_biba *subj, *obj;
1656 subj = SLOT(cred->cr_label);
1657 obj = SLOT(kslabel);
1659 if (!biba_dominate_effective(subj, obj))
1666 biba_posixsem_check_write(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(subj, obj))
1684 biba_posixsem_check_rdonly(struct ucred *active_cred, struct ucred *file_cred,
1685 struct ksem *ks, struct label *kslabel)
1687 struct mac_biba *subj, *obj;
1692 subj = SLOT(active_cred->cr_label);
1693 obj = SLOT(kslabel);
1695 if (!biba_dominate_effective(obj, subj))
1702 biba_posixsem_create(struct ucred *cred, struct ksem *ks,
1703 struct label *kslabel)
1705 struct mac_biba *source, *dest;
1707 source = SLOT(cred->cr_label);
1708 dest = SLOT(kslabel);
1710 biba_copy_effective(source, dest);
1714 biba_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd,
1715 struct label *shmlabel, int prot, int flags)
1717 struct mac_biba *subj, *obj;
1719 if (!biba_enabled || !revocation_enabled)
1722 subj = SLOT(cred->cr_label);
1723 obj = SLOT(shmlabel);
1725 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
1726 if (!biba_dominate_effective(obj, subj))
1729 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
1730 if (!biba_dominate_effective(subj, obj))
1738 biba_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd,
1739 struct label *shmlabel, accmode_t accmode)
1741 struct mac_biba *subj, *obj;
1746 subj = SLOT(cred->cr_label);
1747 obj = SLOT(shmlabel);
1749 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
1750 if (!biba_dominate_effective(obj, subj))
1753 if (accmode & VMODIFY_PERMS) {
1754 if (!biba_dominate_effective(subj, obj))
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_create(struct ucred *cred, struct shmfd *shmfd,
1853 struct label *shmlabel)
1855 struct mac_biba *source, *dest;
1857 source = SLOT(cred->cr_label);
1858 dest = SLOT(shmlabel);
1860 biba_copy_effective(source, dest);
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.
1869 biba_priv_check(struct ucred *cred, int priv)
1871 struct mac_biba *subj;
1878 * Exempt only specific privileges from the Biba integrity policy.
1885 * Allow processes to manipulate basic process audit properties, and
1886 * to submit audit records.
1888 case PRIV_AUDIT_GETAUDIT:
1889 case PRIV_AUDIT_SETAUDIT:
1890 case PRIV_AUDIT_SUBMIT:
1893 * Allow processes to manipulate their regular UNIX credentials.
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:
1906 * Allow processes to perform system monitoring.
1908 case PRIV_SEEOTHERGIDS:
1909 case PRIV_SEEOTHERUIDS:
1913 * Allow access to general process debugging facilities. We
1914 * separately control debugging based on MAC label.
1916 case PRIV_DEBUG_DIFFCRED:
1917 case PRIV_DEBUG_SUGID:
1918 case PRIV_DEBUG_UNPRIV:
1921 * Allow manipulating jails.
1923 case PRIV_JAIL_ATTACH:
1926 * Allow privilege with respect to the Partition policy, but not the
1929 case PRIV_MAC_PARTITION:
1932 * Allow privilege with respect to process resource limits and login
1935 case PRIV_PROC_LIMIT:
1936 case PRIV_PROC_SETLOGIN:
1937 case PRIV_PROC_SETRLIMIT:
1940 * Allow System V and POSIX IPC privileges.
1943 case PRIV_IPC_WRITE:
1944 case PRIV_IPC_ADMIN:
1945 case PRIV_IPC_MSGSIZE:
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.
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:
1961 * More IPC privileges.
1963 case PRIV_SEM_WRITE:
1966 * Allow signaling privileges subject to integrity policy.
1968 case PRIV_SIGNAL_DIFFCRED:
1969 case PRIV_SIGNAL_SUGID:
1972 * Allow access to only limited sysctls from lower integrity levels;
1973 * piggy-back on the Jail definition.
1975 case PRIV_SYSCTL_WRITEJAIL:
1978 * Allow TTY-based privileges, subject to general device access using
1979 * labels on TTY device nodes, but not console privilege.
1981 case PRIV_TTY_DRAINWAIT:
1982 case PRIV_TTY_DTRWAIT:
1983 case PRIV_TTY_EXCLUSIVE:
1988 * Grant most VFS privileges, as almost all are in practice bounded
1989 * by more specific checks using labels.
1992 case PRIV_VFS_WRITE:
1993 case PRIV_VFS_ADMIN:
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:
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:
2019 * Allow VM privileges; it would be nice if these were subject to
2022 case PRIV_VM_MADV_PROTECT:
2024 case PRIV_VM_MUNLOCK:
2025 case PRIV_VM_SWAP_NOQUOTA:
2026 case PRIV_VM_SWAP_NORLIMIT:
2029 * Allow some but not all network privileges. In general, dont allow
2030 * reconfiguring the network stack, just normal use.
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:
2041 * All remaining system privileges are allow only if the process
2042 * holds privilege with respect to the Biba policy.
2045 subj = SLOT(cred->cr_label);
2046 error = biba_subject_privileged(subj);
2054 biba_proc_check_debug(struct ucred *cred, struct proc *p)
2056 struct mac_biba *subj, *obj;
2061 subj = SLOT(cred->cr_label);
2062 obj = SLOT(p->p_ucred->cr_label);
2064 /* XXX: range checks */
2065 if (!biba_dominate_effective(obj, subj))
2067 if (!biba_dominate_effective(subj, obj))
2074 biba_proc_check_sched(struct ucred *cred, struct proc *p)
2076 struct mac_biba *subj, *obj;
2081 subj = SLOT(cred->cr_label);
2082 obj = SLOT(p->p_ucred->cr_label);
2084 /* XXX: range checks */
2085 if (!biba_dominate_effective(obj, subj))
2087 if (!biba_dominate_effective(subj, obj))
2094 biba_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
2096 struct mac_biba *subj, *obj;
2101 subj = SLOT(cred->cr_label);
2102 obj = SLOT(p->p_ucred->cr_label);
2104 /* XXX: range checks */
2105 if (!biba_dominate_effective(obj, subj))
2107 if (!biba_dominate_effective(subj, obj))
2114 biba_socket_check_deliver(struct socket *so, struct label *solabel,
2115 struct mbuf *m, struct label *mlabel)
2117 struct mac_biba *p, *s;
2127 error = biba_equal_effective(p, s) ? 0 : EACCES;
2133 biba_socket_check_relabel(struct ucred *cred, struct socket *so,
2134 struct label *solabel, struct label *newlabel)
2136 struct mac_biba *subj, *obj, *new;
2139 SOCK_LOCK_ASSERT(so);
2141 new = SLOT(newlabel);
2142 subj = SLOT(cred->cr_label);
2143 obj = SLOT(solabel);
2146 * If there is a Biba label update for the socket, it may be an
2147 * update of effective.
2149 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
2154 * To relabel a socket, the old socket effective must be in the
2157 if (!biba_effective_in_range(obj, subj))
2161 * If the Biba label is to be changed, authorize as appropriate.
2163 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
2165 * To relabel a socket, the new socket effective must be in
2166 * the subject range.
2168 if (!biba_effective_in_range(new, subj))
2172 * To change the Biba label on the socket to contain EQUAL,
2173 * the subject must have appropriate privilege.
2175 if (biba_contains_equal(new)) {
2176 error = biba_subject_privileged(subj);
2186 biba_socket_check_visible(struct ucred *cred, struct socket *so,
2187 struct label *solabel)
2189 struct mac_biba *subj, *obj;
2194 subj = SLOT(cred->cr_label);
2195 obj = SLOT(solabel);
2198 if (!biba_dominate_effective(obj, subj)) {
2208 biba_socket_create(struct ucred *cred, struct socket *so,
2209 struct label *solabel)
2211 struct mac_biba *source, *dest;
2213 source = SLOT(cred->cr_label);
2214 dest = SLOT(solabel);
2216 biba_copy_effective(source, dest);
2220 biba_socket_create_mbuf(struct socket *so, struct label *solabel,
2221 struct mbuf *m, struct label *mlabel)
2223 struct mac_biba *source, *dest;
2225 source = SLOT(solabel);
2226 dest = SLOT(mlabel);
2229 biba_copy_effective(source, dest);
2234 biba_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2235 struct socket *newso, struct label *newsolabel)
2237 struct mac_biba source, *dest;
2240 source = *SLOT(oldsolabel);
2243 dest = SLOT(newsolabel);
2246 biba_copy_effective(&source, dest);
2251 biba_socket_relabel(struct ucred *cred, struct socket *so,
2252 struct label *solabel, struct label *newlabel)
2254 struct mac_biba *source, *dest;
2256 SOCK_LOCK_ASSERT(so);
2258 source = SLOT(newlabel);
2259 dest = SLOT(solabel);
2261 biba_copy(source, dest);
2265 biba_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2266 struct socket *so, struct label *sopeerlabel)
2268 struct mac_biba *source, *dest;
2270 source = SLOT(mlabel);
2271 dest = SLOT(sopeerlabel);
2274 biba_copy_effective(source, dest);
2279 biba_socketpeer_set_from_socket(struct socket *oldso,
2280 struct label *oldsolabel, struct socket *newso,
2281 struct label *newsopeerlabel)
2283 struct mac_biba source, *dest;
2286 source = *SLOT(oldsolabel);
2288 dest = SLOT(newsopeerlabel);
2291 biba_copy_effective(&source, dest);
2296 biba_syncache_create(struct label *label, struct inpcb *inp)
2298 struct mac_biba *source, *dest;
2300 source = SLOT(inp->inp_label);
2302 biba_copy_effective(source, dest);
2306 biba_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2307 struct label *mlabel)
2309 struct mac_biba *source, *dest;
2311 source = SLOT(sc_label);
2312 dest = SLOT(mlabel);
2313 biba_copy_effective(source, dest);
2317 biba_system_check_acct(struct ucred *cred, struct vnode *vp,
2318 struct label *vplabel)
2320 struct mac_biba *subj, *obj;
2326 subj = SLOT(cred->cr_label);
2328 error = biba_subject_privileged(subj);
2332 if (vplabel == NULL)
2335 obj = SLOT(vplabel);
2336 if (!biba_high_effective(obj))
2343 biba_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2344 struct label *vplabel)
2346 struct mac_biba *subj, *obj;
2352 subj = SLOT(cred->cr_label);
2354 error = biba_subject_privileged(subj);
2358 if (vplabel == NULL)
2361 obj = SLOT(vplabel);
2362 if (!biba_high_effective(obj))
2369 biba_system_check_auditon(struct ucred *cred, int cmd)
2371 struct mac_biba *subj;
2377 subj = SLOT(cred->cr_label);
2379 error = biba_subject_privileged(subj);
2387 biba_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2388 struct label *label)
2390 struct mac_biba *subj;
2396 subj = SLOT(cred->cr_label);
2398 error = biba_subject_privileged(subj);
2406 biba_system_check_swapon(struct ucred *cred, struct vnode *vp,
2407 struct label *vplabel)
2409 struct mac_biba *subj, *obj;
2415 subj = SLOT(cred->cr_label);
2416 obj = SLOT(vplabel);
2418 error = biba_subject_privileged(subj);
2422 if (!biba_high_effective(obj))
2429 biba_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2430 void *arg1, int arg2, struct sysctl_req *req)
2432 struct mac_biba *subj;
2438 subj = SLOT(cred->cr_label);
2441 * Treat sysctl variables without CTLFLAG_ANYBODY flag as biba/high,
2442 * but also require privilege to change them.
2444 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2445 if (!biba_subject_dominate_high(subj))
2448 error = biba_subject_privileged(subj);
2457 biba_sysvmsg_cleanup(struct label *msglabel)
2460 bzero(SLOT(msglabel), sizeof(struct mac_biba));
2464 biba_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2465 struct label *msqlabel, struct msg *msgptr, struct label *msglabel)
2467 struct mac_biba *source, *dest;
2469 /* Ignore the msgq label */
2470 source = SLOT(cred->cr_label);
2471 dest = SLOT(msglabel);
2473 biba_copy_effective(source, dest);
2477 biba_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr,
2478 struct label *msglabel)
2480 struct mac_biba *subj, *obj;
2485 subj = SLOT(cred->cr_label);
2486 obj = SLOT(msglabel);
2488 if (!biba_dominate_effective(obj, subj))
2495 biba_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr,
2496 struct label *msglabel)
2498 struct mac_biba *subj, *obj;
2503 subj = SLOT(cred->cr_label);
2504 obj = SLOT(msglabel);
2506 if (!biba_dominate_effective(subj, obj))
2513 biba_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr,
2514 struct label *msqklabel)
2516 struct mac_biba *subj, *obj;
2521 subj = SLOT(cred->cr_label);
2522 obj = SLOT(msqklabel);
2524 if (!biba_dominate_effective(obj, subj))
2531 biba_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr,
2532 struct label *msqklabel)
2534 struct mac_biba *subj, *obj;
2539 subj = SLOT(cred->cr_label);
2540 obj = SLOT(msqklabel);
2542 if (!biba_dominate_effective(subj, obj))
2549 biba_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr,
2550 struct label *msqklabel)
2552 struct mac_biba *subj, *obj;
2557 subj = SLOT(cred->cr_label);
2558 obj = SLOT(msqklabel);
2560 if (!biba_dominate_effective(obj, subj))
2567 biba_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
2568 struct label *msqklabel, int cmd)
2570 struct mac_biba *subj, *obj;
2575 subj = SLOT(cred->cr_label);
2576 obj = SLOT(msqklabel);
2581 if (!biba_dominate_effective(subj, obj))
2586 if (!biba_dominate_effective(obj, subj))
2598 biba_sysvmsq_cleanup(struct label *msqlabel)
2601 bzero(SLOT(msqlabel), sizeof(struct mac_biba));
2605 biba_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2606 struct label *msqlabel)
2608 struct mac_biba *source, *dest;
2610 source = SLOT(cred->cr_label);
2611 dest = SLOT(msqlabel);
2613 biba_copy_effective(source, dest);
2617 biba_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr,
2618 struct label *semaklabel, int cmd)
2620 struct mac_biba *subj, *obj;
2625 subj = SLOT(cred->cr_label);
2626 obj = SLOT(semaklabel);
2633 if (!biba_dominate_effective(subj, obj))
2643 if (!biba_dominate_effective(obj, subj))
2655 biba_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr,
2656 struct label *semaklabel)
2658 struct mac_biba *subj, *obj;
2663 subj = SLOT(cred->cr_label);
2664 obj = SLOT(semaklabel);
2666 if (!biba_dominate_effective(obj, subj))
2673 biba_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr,
2674 struct label *semaklabel, size_t accesstype)
2676 struct mac_biba *subj, *obj;
2681 subj = SLOT(cred->cr_label);
2682 obj = SLOT(semaklabel);
2684 if (accesstype & SEM_R)
2685 if (!biba_dominate_effective(obj, subj))
2688 if (accesstype & SEM_A)
2689 if (!biba_dominate_effective(subj, obj))
2696 biba_sysvsem_cleanup(struct label *semalabel)
2699 bzero(SLOT(semalabel), sizeof(struct mac_biba));
2703 biba_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr,
2704 struct label *semalabel)
2706 struct mac_biba *source, *dest;
2708 source = SLOT(cred->cr_label);
2709 dest = SLOT(semalabel);
2711 biba_copy_effective(source, dest);
2715 biba_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
2716 struct label *shmseglabel, int shmflg)
2718 struct mac_biba *subj, *obj;
2723 subj = SLOT(cred->cr_label);
2724 obj = SLOT(shmseglabel);
2726 if (!biba_dominate_effective(obj, subj))
2728 if ((shmflg & SHM_RDONLY) == 0) {
2729 if (!biba_dominate_effective(subj, obj))
2737 biba_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
2738 struct label *shmseglabel, int cmd)
2740 struct mac_biba *subj, *obj;
2745 subj = SLOT(cred->cr_label);
2746 obj = SLOT(shmseglabel);
2751 if (!biba_dominate_effective(subj, obj))
2757 if (!biba_dominate_effective(obj, subj))
2769 biba_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
2770 struct label *shmseglabel, int shmflg)
2772 struct mac_biba *subj, *obj;
2777 subj = SLOT(cred->cr_label);
2778 obj = SLOT(shmseglabel);
2780 if (!biba_dominate_effective(obj, subj))
2787 biba_sysvshm_cleanup(struct label *shmlabel)
2790 bzero(SLOT(shmlabel), sizeof(struct mac_biba));
2794 biba_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr,
2795 struct label *shmlabel)
2797 struct mac_biba *source, *dest;
2799 source = SLOT(cred->cr_label);
2800 dest = SLOT(shmlabel);
2802 biba_copy_effective(source, dest);
2806 biba_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2807 struct vnode *vp, struct label *vplabel)
2809 struct mac_biba mb_temp, *source, *dest;
2812 source = SLOT(mplabel);
2813 dest = SLOT(vplabel);
2815 buflen = sizeof(mb_temp);
2816 bzero(&mb_temp, buflen);
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);
2827 if (buflen != sizeof(mb_temp)) {
2828 printf("biba_vnode_associate_extattr: bad size %d\n",
2832 if (biba_valid(&mb_temp) != 0) {
2833 printf("biba_vnode_associate_extattr: invalid\n");
2836 if ((mb_temp.mb_flags & MAC_BIBA_FLAGS_BOTH) !=
2837 MAC_BIBA_FLAG_EFFECTIVE) {
2838 printf("biba_vnode_associate_extattr: not effective\n");
2842 biba_copy_effective(&mb_temp, dest);
2847 biba_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2848 struct vnode *vp, struct label *vplabel)
2850 struct mac_biba *source, *dest;
2852 source = SLOT(mplabel);
2853 dest = SLOT(vplabel);
2855 biba_copy_effective(source, dest);
2859 biba_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
2860 struct label *dvplabel)
2862 struct mac_biba *subj, *obj;
2867 subj = SLOT(cred->cr_label);
2868 obj = SLOT(dvplabel);
2870 if (!biba_dominate_effective(obj, subj))
2877 biba_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
2878 struct label *dvplabel)
2880 struct mac_biba *subj, *obj;
2885 subj = SLOT(cred->cr_label);
2886 obj = SLOT(dvplabel);
2888 if (!biba_dominate_effective(obj, subj))
2895 biba_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2896 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2898 struct mac_biba *subj, *obj;
2903 subj = SLOT(cred->cr_label);
2904 obj = SLOT(dvplabel);
2906 if (!biba_dominate_effective(subj, obj))
2913 biba_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2914 struct label *vplabel, acl_type_t type)
2916 struct mac_biba *subj, *obj;
2921 subj = SLOT(cred->cr_label);
2922 obj = SLOT(vplabel);
2924 if (!biba_dominate_effective(subj, obj))
2931 biba_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
2932 struct label *vplabel, int attrnamespace, const char *name)
2934 struct mac_biba *subj, *obj;
2939 subj = SLOT(cred->cr_label);
2940 obj = SLOT(vplabel);
2942 if (!biba_dominate_effective(subj, obj))
2949 biba_vnode_check_exec(struct ucred *cred, struct vnode *vp,
2950 struct label *vplabel, struct image_params *imgp,
2951 struct label *execlabel)
2953 struct mac_biba *subj, *obj, *exec;
2956 if (execlabel != NULL) {
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.
2962 exec = SLOT(execlabel);
2963 error = biba_atmostflags(exec, 0);
2971 subj = SLOT(cred->cr_label);
2972 obj = SLOT(vplabel);
2974 if (!biba_dominate_effective(obj, subj))
2981 biba_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
2982 struct label *vplabel, acl_type_t type)
2984 struct mac_biba *subj, *obj;
2989 subj = SLOT(cred->cr_label);
2990 obj = SLOT(vplabel);
2992 if (!biba_dominate_effective(obj, subj))
2999 biba_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
3000 struct label *vplabel, int attrnamespace, const char *name)
3002 struct mac_biba *subj, *obj;
3007 subj = SLOT(cred->cr_label);
3008 obj = SLOT(vplabel);
3010 if (!biba_dominate_effective(obj, subj))
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)
3021 struct mac_biba *subj, *obj;
3026 subj = SLOT(cred->cr_label);
3027 obj = SLOT(dvplabel);
3029 if (!biba_dominate_effective(subj, obj))
3032 obj = SLOT(vplabel);
3034 if (!biba_dominate_effective(subj, obj))
3041 biba_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
3042 struct label *vplabel, int attrnamespace)
3044 struct mac_biba *subj, *obj;
3049 subj = SLOT(cred->cr_label);
3050 obj = SLOT(vplabel);
3052 if (!biba_dominate_effective(obj, subj))
3059 biba_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
3060 struct label *dvplabel, struct componentname *cnp)
3062 struct mac_biba *subj, *obj;
3067 subj = SLOT(cred->cr_label);
3068 obj = SLOT(dvplabel);
3070 if (!biba_dominate_effective(obj, subj))
3077 biba_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
3078 struct label *vplabel, int prot, int flags)
3080 struct mac_biba *subj, *obj;
3083 * Rely on the use of open()-time protections to handle
3084 * non-revocation cases.
3086 if (!biba_enabled || !revocation_enabled)
3089 subj = SLOT(cred->cr_label);
3090 obj = SLOT(vplabel);
3092 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
3093 if (!biba_dominate_effective(obj, subj))
3096 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
3097 if (!biba_dominate_effective(subj, obj))
3105 biba_vnode_check_open(struct ucred *cred, struct vnode *vp,
3106 struct label *vplabel, accmode_t accmode)
3108 struct mac_biba *subj, *obj;
3113 subj = SLOT(cred->cr_label);
3114 obj = SLOT(vplabel);
3116 /* XXX privilege override for admin? */
3117 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
3118 if (!biba_dominate_effective(obj, subj))
3121 if (accmode & VMODIFY_PERMS) {
3122 if (!biba_dominate_effective(subj, obj))
3130 biba_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
3131 struct vnode *vp, struct label *vplabel)
3133 struct mac_biba *subj, *obj;
3135 if (!biba_enabled || !revocation_enabled)
3138 subj = SLOT(active_cred->cr_label);
3139 obj = SLOT(vplabel);
3141 if (!biba_dominate_effective(obj, subj))
3148 biba_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
3149 struct vnode *vp, struct label *vplabel)
3151 struct mac_biba *subj, *obj;
3153 if (!biba_enabled || !revocation_enabled)
3156 subj = SLOT(active_cred->cr_label);
3157 obj = SLOT(vplabel);
3159 if (!biba_dominate_effective(obj, subj))
3166 biba_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
3167 struct label *dvplabel)
3169 struct mac_biba *subj, *obj;
3174 subj = SLOT(cred->cr_label);
3175 obj = SLOT(dvplabel);
3177 if (!biba_dominate_effective(obj, subj))
3184 biba_vnode_check_readlink(struct ucred *cred, struct vnode *vp,
3185 struct label *vplabel)
3187 struct mac_biba *subj, *obj;
3192 subj = SLOT(cred->cr_label);
3193 obj = SLOT(vplabel);
3195 if (!biba_dominate_effective(obj, subj))
3202 biba_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
3203 struct label *vplabel, struct label *newlabel)
3205 struct mac_biba *old, *new, *subj;
3208 old = SLOT(vplabel);
3209 new = SLOT(newlabel);
3210 subj = SLOT(cred->cr_label);
3213 * If there is a Biba label update for the vnode, it must be a
3216 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
3221 * To perform a relabel of the vnode (Biba label or not), Biba must
3222 * authorize the relabel.
3224 if (!biba_effective_in_range(old, subj))
3228 * If the Biba label is to be changed, authorize as appropriate.
3230 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
3232 * To change the Biba label on a vnode, the new vnode label
3233 * must be in the subject range.
3235 if (!biba_effective_in_range(new, subj))
3239 * To change the Biba label on the vnode to be EQUAL, the
3240 * subject must have appropriate privilege.
3242 if (biba_contains_equal(new)) {
3243 error = biba_subject_privileged(subj);
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)
3257 struct mac_biba *subj, *obj;
3262 subj = SLOT(cred->cr_label);
3263 obj = SLOT(dvplabel);
3265 if (!biba_dominate_effective(subj, obj))
3268 obj = SLOT(vplabel);
3270 if (!biba_dominate_effective(subj, obj))
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)
3281 struct mac_biba *subj, *obj;
3286 subj = SLOT(cred->cr_label);
3287 obj = SLOT(dvplabel);
3289 if (!biba_dominate_effective(subj, obj))
3293 obj = SLOT(vplabel);
3295 if (!biba_dominate_effective(subj, obj))
3303 biba_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
3304 struct label *vplabel)
3306 struct mac_biba *subj, *obj;
3311 subj = SLOT(cred->cr_label);
3312 obj = SLOT(vplabel);
3314 if (!biba_dominate_effective(subj, obj))
3321 biba_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
3322 struct label *vplabel, acl_type_t type, struct acl *acl)
3324 struct mac_biba *subj, *obj;
3329 subj = SLOT(cred->cr_label);
3330 obj = SLOT(vplabel);
3332 if (!biba_dominate_effective(subj, obj))
3339 biba_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
3340 struct label *vplabel, int attrnamespace, const char *name)
3342 struct mac_biba *subj, *obj;
3347 subj = SLOT(cred->cr_label);
3348 obj = SLOT(vplabel);
3350 if (!biba_dominate_effective(subj, obj))
3353 /* XXX: protect the MAC EA in a special way? */
3359 biba_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
3360 struct label *vplabel, u_long flags)
3362 struct mac_biba *subj, *obj;
3367 subj = SLOT(cred->cr_label);
3368 obj = SLOT(vplabel);
3370 if (!biba_dominate_effective(subj, obj))
3377 biba_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
3378 struct label *vplabel, mode_t mode)
3380 struct mac_biba *subj, *obj;
3385 subj = SLOT(cred->cr_label);
3386 obj = SLOT(vplabel);
3388 if (!biba_dominate_effective(subj, obj))
3395 biba_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
3396 struct label *vplabel, uid_t uid, gid_t gid)
3398 struct mac_biba *subj, *obj;
3403 subj = SLOT(cred->cr_label);
3404 obj = SLOT(vplabel);
3406 if (!biba_dominate_effective(subj, obj))
3413 biba_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
3414 struct label *vplabel, struct timespec atime, struct timespec mtime)
3416 struct mac_biba *subj, *obj;
3421 subj = SLOT(cred->cr_label);
3422 obj = SLOT(vplabel);
3424 if (!biba_dominate_effective(subj, obj))
3431 biba_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred,
3432 struct vnode *vp, struct label *vplabel)
3434 struct mac_biba *subj, *obj;
3439 subj = SLOT(active_cred->cr_label);
3440 obj = SLOT(vplabel);
3442 if (!biba_dominate_effective(obj, subj))
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)
3453 struct mac_biba *subj, *obj;
3458 subj = SLOT(cred->cr_label);
3459 obj = SLOT(dvplabel);
3461 if (!biba_dominate_effective(subj, obj))
3464 obj = SLOT(vplabel);
3466 if (!biba_dominate_effective(subj, obj))
3473 biba_vnode_check_write(struct ucred *active_cred,
3474 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
3476 struct mac_biba *subj, *obj;
3478 if (!biba_enabled || !revocation_enabled)
3481 subj = SLOT(active_cred->cr_label);
3482 obj = SLOT(vplabel);
3484 if (!biba_dominate_effective(subj, obj))
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)
3495 struct mac_biba *source, *dest, mb_temp;
3499 buflen = sizeof(mb_temp);
3500 bzero(&mb_temp, buflen);
3502 source = SLOT(cred->cr_label);
3503 dest = SLOT(vplabel);
3504 biba_copy_effective(source, &mb_temp);
3506 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3507 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3509 biba_copy_effective(source, dest);
3514 biba_vnode_relabel(struct ucred *cred, struct vnode *vp,
3515 struct label *vplabel, struct label *newlabel)
3517 struct mac_biba *source, *dest;
3519 source = SLOT(newlabel);
3520 dest = SLOT(vplabel);
3522 biba_copy(source, dest);
3526 biba_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
3527 struct label *vplabel, struct label *intlabel)
3529 struct mac_biba *source, mb_temp;
3533 buflen = sizeof(mb_temp);
3534 bzero(&mb_temp, buflen);
3536 source = SLOT(intlabel);
3537 if ((source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) == 0)
3540 biba_copy_effective(source, &mb_temp);
3542 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3543 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3547 static struct mac_policy_ops mac_biba_ops =
3549 .mpo_init = biba_init,
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,
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,
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,
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,
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,
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,
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,
3610 .mpo_kld_check_load = biba_kld_check_load,
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,
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,
3621 .mpo_netatalk_aarp_send = biba_netatalk_aarp_send,
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,
3630 .mpo_netinet6_nd6_send = biba_netinet6_nd6_send,
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,
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,
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,
3669 .mpo_priv_check = biba_priv_check,
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,
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,
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,
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,
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,
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,
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,
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,
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,
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,
3781 MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
3782 MPC_LOADTIME_FLAG_NOTLATE, &biba_slot);