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freebsd-dev/sys/security/mac_biba/mac_biba.c
Robert Watson 103bcded1d Style fix: space between 'switch' and '('.
2002-10-22 19:01:49 +00:00

2646 lines
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/*-
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
* Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed by Robert Watson for the TrustedBSD Project.
*
* This software was developed for the FreeBSD Project in part by NAI Labs,
* the Security Research Division of Network Associates, Inc. under
* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
* CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Developed by the TrustedBSD Project.
* Biba fixed label mandatory integrity policy.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/acl.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/mac.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/sysent.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/pipe.h>
#include <sys/sysctl.h>
#include <fs/devfs/devfs.h>
#include <net/bpfdesc.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <netinet/in.h>
#include <netinet/ip_var.h>
#include <vm/vm.h>
#include <sys/mac_policy.h>
#include <security/mac_biba/mac_biba.h>
SYSCTL_DECL(_security_mac);
SYSCTL_NODE(_security_mac, OID_AUTO, biba, CTLFLAG_RW, 0,
"TrustedBSD mac_biba policy controls");
static int mac_biba_enabled = 0;
SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RW,
&mac_biba_enabled, 0, "Enforce MAC/Biba policy");
TUNABLE_INT("security.mac.biba.enabled", &mac_biba_enabled);
static int destroyed_not_inited;
SYSCTL_INT(_security_mac_biba, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
&destroyed_not_inited, 0, "Count of labels destroyed but not inited");
static int trust_all_interfaces = 0;
SYSCTL_INT(_security_mac_biba, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
&trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/Biba");
TUNABLE_INT("security.mac.biba.trust_all_interfaces", &trust_all_interfaces);
static char trusted_interfaces[128];
SYSCTL_STRING(_security_mac_biba, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/Biba");
TUNABLE_STR("security.mac.biba.trusted_interfaces", trusted_interfaces,
sizeof(trusted_interfaces));
static int max_compartments = MAC_BIBA_MAX_COMPARTMENTS;
SYSCTL_INT(_security_mac_biba, OID_AUTO, max_compartments, CTLFLAG_RD,
&max_compartments, 0, "Maximum supported compartments");
static int ptys_equal = 0;
SYSCTL_INT(_security_mac_biba, OID_AUTO, ptys_equal, CTLFLAG_RW,
&ptys_equal, 0, "Label pty devices as biba/equal on create");
TUNABLE_INT("security.mac.biba.ptys_equal", &ptys_equal);
static int revocation_enabled = 0;
SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RW,
&revocation_enabled, 0, "Revoke access to objects on relabel");
TUNABLE_INT("security.mac.biba.revocation_enabled", &revocation_enabled);
static int mac_biba_slot;
#define SLOT(l) ((struct mac_biba *)LABEL_TO_SLOT((l), mac_biba_slot).l_ptr)
MALLOC_DEFINE(M_MACBIBA, "biba label", "MAC/Biba labels");
static __inline int
biba_bit_set_empty(u_char *set) {
int i;
for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
if (set[i] != 0)
return (0);
return (1);
}
static struct mac_biba *
biba_alloc(int flag)
{
struct mac_biba *mac_biba;
mac_biba = malloc(sizeof(struct mac_biba), M_MACBIBA, M_ZERO | flag);
return (mac_biba);
}
static void
biba_free(struct mac_biba *mac_biba)
{
if (mac_biba != NULL)
free(mac_biba, M_MACBIBA);
else
atomic_add_int(&destroyed_not_inited, 1);
}
static int
biba_atmostflags(struct mac_biba *mac_biba, int flags)
{
if ((mac_biba->mb_flags & flags) != mac_biba->mb_flags)
return (EINVAL);
return (0);
}
static int
mac_biba_dominate_element(struct mac_biba_element *a,
struct mac_biba_element *b)
{
int bit;
switch (a->mbe_type) {
case MAC_BIBA_TYPE_EQUAL:
case MAC_BIBA_TYPE_HIGH:
return (1);
case MAC_BIBA_TYPE_LOW:
switch (b->mbe_type) {
case MAC_BIBA_TYPE_GRADE:
case MAC_BIBA_TYPE_HIGH:
return (0);
case MAC_BIBA_TYPE_EQUAL:
case MAC_BIBA_TYPE_LOW:
return (1);
default:
panic("mac_biba_dominate_element: b->mbe_type invalid");
}
case MAC_BIBA_TYPE_GRADE:
switch (b->mbe_type) {
case MAC_BIBA_TYPE_EQUAL:
case MAC_BIBA_TYPE_LOW:
return (1);
case MAC_BIBA_TYPE_HIGH:
return (0);
case MAC_BIBA_TYPE_GRADE:
for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++)
if (!MAC_BIBA_BIT_TEST(bit,
a->mbe_compartments) &&
MAC_BIBA_BIT_TEST(bit, b->mbe_compartments))
return (0);
return (a->mbe_grade >= b->mbe_grade);
default:
panic("mac_biba_dominate_element: b->mbe_type invalid");
}
default:
panic("mac_biba_dominate_element: a->mbe_type invalid");
}
return (0);
}
static int
mac_biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
{
return (mac_biba_dominate_element(&rangeb->mb_rangehigh,
&rangea->mb_rangehigh) &&
mac_biba_dominate_element(&rangea->mb_rangelow,
&rangeb->mb_rangelow));
}
static int
mac_biba_single_in_range(struct mac_biba *single, struct mac_biba *range)
{
KASSERT((single->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
("mac_biba_single_in_range: a not single"));
KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
("mac_biba_single_in_range: b not range"));
return (mac_biba_dominate_element(&range->mb_rangehigh,
&single->mb_single) &&
mac_biba_dominate_element(&single->mb_single,
&range->mb_rangelow));
return (1);
}
static int
mac_biba_dominate_single(struct mac_biba *a, struct mac_biba *b)
{
KASSERT((a->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
("mac_biba_dominate_single: a not single"));
KASSERT((b->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
("mac_biba_dominate_single: b not single"));
return (mac_biba_dominate_element(&a->mb_single, &b->mb_single));
}
static int
mac_biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
{
if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
b->mbe_type == MAC_BIBA_TYPE_EQUAL)
return (1);
return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
}
static int
mac_biba_equal_single(struct mac_biba *a, struct mac_biba *b)
{
KASSERT((a->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
("mac_biba_equal_single: a not single"));
KASSERT((b->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
("mac_biba_equal_single: b not single"));
return (mac_biba_equal_element(&a->mb_single, &b->mb_single));
}
static int
mac_biba_contains_equal(struct mac_biba *mac_biba)
{
if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE)
if (mac_biba->mb_single.mbe_type == MAC_BIBA_TYPE_EQUAL)
return (1);
if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
if (mac_biba->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
return (1);
if (mac_biba->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
return (1);
}
return (0);
}
static int
mac_biba_subject_equal_ok(struct mac_biba *mac_biba)
{
KASSERT((mac_biba->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
MAC_BIBA_FLAGS_BOTH,
("mac_biba_subject_equal_ok: subject doesn't have both labels"));
/* If the single is EQUAL, it's ok. */
if (mac_biba->mb_single.mbe_type == MAC_BIBA_TYPE_EQUAL)
return (0);
/* If either range endpoint is EQUAL, it's ok. */
if (mac_biba->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL ||
mac_biba->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
return (0);
/* If the range is low-high, it's ok. */
if (mac_biba->mb_rangelow.mbe_type == MAC_BIBA_TYPE_LOW &&
mac_biba->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_HIGH)
return (0);
/* It's not ok. */
return (EPERM);
}
static int
mac_biba_valid(struct mac_biba *mac_biba)
{
if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) {
switch (mac_biba->mb_single.mbe_type) {
case MAC_BIBA_TYPE_GRADE:
break;
case MAC_BIBA_TYPE_EQUAL:
case MAC_BIBA_TYPE_HIGH:
case MAC_BIBA_TYPE_LOW:
if (mac_biba->mb_single.mbe_grade != 0 ||
!MAC_BIBA_BIT_SET_EMPTY(
mac_biba->mb_single.mbe_compartments))
return (EINVAL);
break;
default:
return (EINVAL);
}
} else {
if (mac_biba->mb_single.mbe_type != MAC_BIBA_TYPE_UNDEF)
return (EINVAL);
}
if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
switch (mac_biba->mb_rangelow.mbe_type) {
case MAC_BIBA_TYPE_GRADE:
break;
case MAC_BIBA_TYPE_EQUAL:
case MAC_BIBA_TYPE_HIGH:
case MAC_BIBA_TYPE_LOW:
if (mac_biba->mb_rangelow.mbe_grade != 0 ||
!MAC_BIBA_BIT_SET_EMPTY(
mac_biba->mb_rangelow.mbe_compartments))
return (EINVAL);
break;
default:
return (EINVAL);
}
switch (mac_biba->mb_rangehigh.mbe_type) {
case MAC_BIBA_TYPE_GRADE:
break;
case MAC_BIBA_TYPE_EQUAL:
case MAC_BIBA_TYPE_HIGH:
case MAC_BIBA_TYPE_LOW:
if (mac_biba->mb_rangehigh.mbe_grade != 0 ||
!MAC_BIBA_BIT_SET_EMPTY(
mac_biba->mb_rangehigh.mbe_compartments))
return (EINVAL);
break;
default:
return (EINVAL);
}
if (!mac_biba_dominate_element(&mac_biba->mb_rangehigh,
&mac_biba->mb_rangelow))
return (EINVAL);
} else {
if (mac_biba->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
mac_biba->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
return (EINVAL);
}
return (0);
}
static void
mac_biba_set_range(struct mac_biba *mac_biba, u_short typelow,
u_short gradelow, u_char *compartmentslow, u_short typehigh,
u_short gradehigh, u_char *compartmentshigh)
{
mac_biba->mb_rangelow.mbe_type = typelow;
mac_biba->mb_rangelow.mbe_grade = gradelow;
if (compartmentslow != NULL)
memcpy(mac_biba->mb_rangelow.mbe_compartments,
compartmentslow,
sizeof(mac_biba->mb_rangelow.mbe_compartments));
mac_biba->mb_rangehigh.mbe_type = typehigh;
mac_biba->mb_rangehigh.mbe_grade = gradehigh;
if (compartmentshigh != NULL)
memcpy(mac_biba->mb_rangehigh.mbe_compartments,
compartmentshigh,
sizeof(mac_biba->mb_rangehigh.mbe_compartments));
mac_biba->mb_flags |= MAC_BIBA_FLAG_RANGE;
}
static void
mac_biba_set_single(struct mac_biba *mac_biba, u_short type, u_short grade,
u_char *compartments)
{
mac_biba->mb_single.mbe_type = type;
mac_biba->mb_single.mbe_grade = grade;
if (compartments != NULL)
memcpy(mac_biba->mb_single.mbe_compartments, compartments,
sizeof(mac_biba->mb_single.mbe_compartments));
mac_biba->mb_flags |= MAC_BIBA_FLAG_SINGLE;
}
static void
mac_biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
{
KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
("mac_biba_copy_range: labelfrom not range"));
labelto->mb_rangelow = labelfrom->mb_rangelow;
labelto->mb_rangehigh = labelfrom->mb_rangehigh;
labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
}
static void
mac_biba_copy_single(struct mac_biba *labelfrom, struct mac_biba *labelto)
{
KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
("mac_biba_copy_single: labelfrom not single"));
labelto->mb_single = labelfrom->mb_single;
labelto->mb_flags |= MAC_BIBA_FLAG_SINGLE;
}
static void
mac_biba_copy(struct mac_biba *source, struct mac_biba *dest)
{
if (source->mb_flags & MAC_BIBA_FLAG_SINGLE)
mac_biba_copy_single(source, dest);
if (source->mb_flags & MAC_BIBA_FLAG_RANGE)
mac_biba_copy_range(source, dest);
}
/*
* Policy module operations.
*/
static void
mac_biba_destroy(struct mac_policy_conf *conf)
{
}
static void
mac_biba_init(struct mac_policy_conf *conf)
{
}
/*
* Label operations.
*/
static void
mac_biba_init_label(struct label *label)
{
SLOT(label) = biba_alloc(M_WAITOK);
}
static int
mac_biba_init_label_waitcheck(struct label *label, int flag)
{
SLOT(label) = biba_alloc(flag);
if (SLOT(label) == NULL)
return (ENOMEM);
return (0);
}
static void
mac_biba_destroy_label(struct label *label)
{
biba_free(SLOT(label));
SLOT(label) = NULL;
}
/*
* mac_biba_element_to_string() is basically an snprintf wrapper with
* the same properties as snprintf(). It returns the length it would
* have added to the string in the event the string is too short.
*/
static size_t
mac_biba_element_to_string(char *string, size_t size,
struct mac_biba_element *element)
{
int pos, bit = 1;
switch (element->mbe_type) {
case MAC_BIBA_TYPE_HIGH:
return (snprintf(string, size, "high"));
case MAC_BIBA_TYPE_LOW:
return (snprintf(string, size, "low"));
case MAC_BIBA_TYPE_EQUAL:
return (snprintf(string, size, "equal"));
case MAC_BIBA_TYPE_GRADE:
pos = snprintf(string, size, "%d:", element->mbe_grade);
for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++) {
if (MAC_BIBA_BIT_TEST(bit, element->mbe_compartments))
pos += snprintf(string + pos, size - pos,
"%d+", bit);
}
if (string[pos - 1] == '+' || string[pos - 1] == ':')
string[--pos] = NULL;
return (pos);
default:
panic("mac_biba_element_to_string: invalid type (%d)",
element->mbe_type);
}
}
static int
mac_biba_to_string(char *string, size_t size, size_t *caller_len,
struct mac_biba *mac_biba)
{
size_t left, len;
char *curptr;
bzero(string, size);
curptr = string;
left = size;
if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) {
len = mac_biba_element_to_string(curptr, left,
&mac_biba->mb_single);
if (len >= left)
return (EINVAL);
left -= len;
curptr += len;
}
if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
len = snprintf(curptr, left, "(");
if (len >= left)
return (EINVAL);
left -= len;
curptr += len;
len = mac_biba_element_to_string(curptr, left,
&mac_biba->mb_rangelow);
if (len >= left)
return (EINVAL);
left -= len;
curptr += len;
len = snprintf(curptr, left, "-");
if (len >= left)
return (EINVAL);
left -= len;
curptr += len;
len = mac_biba_element_to_string(curptr, left,
&mac_biba->mb_rangehigh);
if (len >= left)
return (EINVAL);
left -= len;
curptr += len;
len = snprintf(curptr, left, ")");
if (len >= left)
return (EINVAL);
left -= len;
curptr += len;
}
*caller_len = strlen(string);
return (0);
}
static int
mac_biba_externalize_label(struct label *label, char *element_name,
char *element_data, size_t size, size_t *len, int *claimed)
{
struct mac_biba *mac_biba;
int error;
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
return (0);
(*claimed)++;
mac_biba = SLOT(label);
error = mac_biba_to_string(element_data, size, len, mac_biba);
if (error)
return (error);
*len = strlen(element_data);
return (0);
}
static int
mac_biba_externalize_vnode_oldmac(struct label *label, struct oldmac *extmac)
{
struct mac_biba *mac_biba;
mac_biba = SLOT(label);
if (mac_biba == NULL) {
printf("mac_biba_externalize_vnode_oldmac: NULL pointer\n");
return (0);
}
extmac->m_biba = *mac_biba;
return (0);
}
static int
mac_biba_parse_element(struct mac_biba_element *element, char *string)
{
if (strcmp(string, "high") == 0 ||
strcmp(string, "hi") == 0) {
element->mbe_type = MAC_BIBA_TYPE_HIGH;
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
} else if (strcmp(string, "low") == 0 ||
strcmp(string, "lo") == 0) {
element->mbe_type = MAC_BIBA_TYPE_LOW;
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
} else if (strcmp(string, "equal") == 0 ||
strcmp(string, "eq") == 0) {
element->mbe_type = MAC_BIBA_TYPE_EQUAL;
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
} else {
char *p0, *p1;
int d;
p0 = string;
d = strtol(p0, &p1, 10);
if (d < 0 || d > 65535)
return (EINVAL);
element->mbe_type = MAC_BIBA_TYPE_GRADE;
element->mbe_grade = d;
if (*p1 != ':') {
if (p1 == p0 || *p1 != '\0')
return (EINVAL);
else
return (0);
}
else
if (*(p1 + 1) == '\0')
return (0);
while ((p0 = ++p1)) {
d = strtol(p0, &p1, 10);
if (d < 1 || d > MAC_BIBA_MAX_COMPARTMENTS)
return (EINVAL);
MAC_BIBA_BIT_SET(d, element->mbe_compartments);
if (*p1 == '\0')
break;
if (p1 == p0 || *p1 != '+')
return (EINVAL);
}
}
return (0);
}
/*
* Note: destructively consumes the string, make a local copy before
* calling if that's a problem.
*/
static int
mac_biba_parse(struct mac_biba *mac_biba, char *string)
{
char *range, *rangeend, *rangehigh, *rangelow, *single;
int error;
/* Do we have a range? */
single = string;
range = index(string, '(');
if (range == single)
single = NULL;
rangelow = rangehigh = NULL;
if (range != NULL) {
/* Nul terminate the end of the single string. */
*range = '\0';
range++;
rangelow = range;
rangehigh = index(rangelow, '-');
if (rangehigh == NULL)
return (EINVAL);
rangehigh++;
if (*rangelow == '\0' || *rangehigh == '\0')
return (EINVAL);
rangeend = index(rangehigh, ')');
if (rangeend == NULL)
return (EINVAL);
if (*(rangeend + 1) != '\0')
return (EINVAL);
/* Nul terminate the ends of the ranges. */
*(rangehigh - 1) = '\0';
*rangeend = '\0';
}
KASSERT((rangelow != NULL && rangehigh != NULL) ||
(rangelow == NULL && rangehigh == NULL),
("mac_biba_internalize_label: range mismatch"));
bzero(mac_biba, sizeof(*mac_biba));
if (single != NULL) {
error = mac_biba_parse_element(&mac_biba->mb_single, single);
if (error)
return (error);
mac_biba->mb_flags |= MAC_BIBA_FLAG_SINGLE;
}
if (rangelow != NULL) {
error = mac_biba_parse_element(&mac_biba->mb_rangelow,
rangelow);
if (error)
return (error);
error = mac_biba_parse_element(&mac_biba->mb_rangehigh,
rangehigh);
if (error)
return (error);
mac_biba->mb_flags |= MAC_BIBA_FLAG_RANGE;
}
error = mac_biba_valid(mac_biba);
if (error)
return (error);
return (0);
}
static int
mac_biba_internalize_label(struct label *label, char *element_name,
char *element_data, int *claimed)
{
struct mac_biba *mac_biba, mac_biba_temp;
int error;
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
return (0);
(*claimed)++;
error = mac_biba_parse(&mac_biba_temp, element_data);
if (error)
return (error);
mac_biba = SLOT(label);
*mac_biba = mac_biba_temp;
return (0);
}
static void
mac_biba_copy_label(struct label *src, struct label *dest)
{
*SLOT(dest) = *SLOT(src);
}
/*
* Labeling event operations: file system objects, and things that look
* a lot like file system objects.
*/
static void
mac_biba_create_devfs_device(dev_t dev, struct devfs_dirent *devfs_dirent,
struct label *label)
{
struct mac_biba *mac_biba;
int biba_type;
mac_biba = SLOT(label);
if (strcmp(dev->si_name, "null") == 0 ||
strcmp(dev->si_name, "zero") == 0 ||
strcmp(dev->si_name, "random") == 0 ||
strncmp(dev->si_name, "fd/", strlen("fd/")) == 0)
biba_type = MAC_BIBA_TYPE_EQUAL;
else if (ptys_equal &&
(strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
biba_type = MAC_BIBA_TYPE_EQUAL;
else
biba_type = MAC_BIBA_TYPE_HIGH;
mac_biba_set_single(mac_biba, biba_type, 0, NULL);
}
static void
mac_biba_create_devfs_directory(char *dirname, int dirnamelen,
struct devfs_dirent *devfs_dirent, struct label *label)
{
struct mac_biba *mac_biba;
mac_biba = SLOT(label);
mac_biba_set_single(mac_biba, MAC_BIBA_TYPE_HIGH, 0, NULL);
}
static void
mac_biba_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd,
struct label *ddlabel, struct devfs_dirent *de, struct label *delabel)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(delabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_devfs_vnode(struct devfs_dirent *devfs_dirent,
struct label *direntlabel, struct vnode *vp, struct label *vnodelabel)
{
struct mac_biba *source, *dest;
source = SLOT(direntlabel);
dest = SLOT(vnodelabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_vnode(struct ucred *cred, struct vnode *parent,
struct label *parentlabel, struct vnode *child, struct label *childlabel)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(childlabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_mount(struct ucred *cred, struct mount *mp,
struct label *mntlabel, struct label *fslabel)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(mntlabel);
mac_biba_copy_single(source, dest);
dest = SLOT(fslabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_root_mount(struct ucred *cred, struct mount *mp,
struct label *mntlabel, struct label *fslabel)
{
struct mac_biba *mac_biba;
/* Always mount root as high integrity. */
mac_biba = SLOT(fslabel);
mac_biba_set_single(mac_biba, MAC_BIBA_TYPE_HIGH, 0, NULL);
mac_biba = SLOT(mntlabel);
mac_biba_set_single(mac_biba, MAC_BIBA_TYPE_HIGH, 0, NULL);
}
static void
mac_biba_relabel_vnode(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, struct label *label)
{
struct mac_biba *source, *dest;
source = SLOT(label);
dest = SLOT(vnodelabel);
mac_biba_copy(source, dest);
}
static void
mac_biba_update_devfsdirent(struct devfs_dirent *devfs_dirent,
struct label *direntlabel, struct vnode *vp, struct label *vnodelabel)
{
struct mac_biba *source, *dest;
source = SLOT(vnodelabel);
dest = SLOT(direntlabel);
mac_biba_copy(source, dest);
}
static void
mac_biba_update_procfsvnode(struct vnode *vp, struct label *vnodelabel,
struct ucred *cred)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(vnodelabel);
/*
* Only copy the single, not the range, since vnodes only have
* a single.
*/
mac_biba_copy_single(source, dest);
}
static int
mac_biba_update_vnode_from_externalized(struct vnode *vp,
struct label *vnodelabel, struct oldmac *extmac)
{
struct mac_biba *source, *dest;
int error;
source = &extmac->m_biba;
dest = SLOT(vnodelabel);
error = mac_biba_valid(source);
if (error)
return (error);
if ((source->mb_flags & MAC_BIBA_FLAGS_BOTH) != MAC_BIBA_FLAG_SINGLE)
return (EINVAL);
mac_biba_copy_single(source, dest);
return (0);
}
static void
mac_biba_update_vnode_from_mount(struct vnode *vp, struct label *vnodelabel,
struct mount *mp, struct label *fslabel)
{
struct mac_biba *source, *dest;
source = SLOT(fslabel);
dest = SLOT(vnodelabel);
mac_biba_copy_single(source, dest);
}
/*
* Labeling event operations: IPC object.
*/
static void
mac_biba_create_mbuf_from_socket(struct socket *so, struct label *socketlabel,
struct mbuf *m, struct label *mbuflabel)
{
struct mac_biba *source, *dest;
source = SLOT(socketlabel);
dest = SLOT(mbuflabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_socket(struct ucred *cred, struct socket *socket,
struct label *socketlabel)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(socketlabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_pipe(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(pipelabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_socket_from_socket(struct socket *oldsocket,
struct label *oldsocketlabel, struct socket *newsocket,
struct label *newsocketlabel)
{
struct mac_biba *source, *dest;
source = SLOT(oldsocketlabel);
dest = SLOT(newsocketlabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_relabel_socket(struct ucred *cred, struct socket *socket,
struct label *socketlabel, struct label *newlabel)
{
struct mac_biba *source, *dest;
source = SLOT(newlabel);
dest = SLOT(socketlabel);
mac_biba_copy(source, dest);
}
static void
mac_biba_relabel_pipe(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel, struct label *newlabel)
{
struct mac_biba *source, *dest;
source = SLOT(newlabel);
dest = SLOT(pipelabel);
mac_biba_copy(source, dest);
}
static void
mac_biba_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct label *mbuflabel,
struct socket *socket, struct label *socketpeerlabel)
{
struct mac_biba *source, *dest;
source = SLOT(mbuflabel);
dest = SLOT(socketpeerlabel);
mac_biba_copy_single(source, dest);
}
/*
* Labeling event operations: network objects.
*/
static void
mac_biba_set_socket_peer_from_socket(struct socket *oldsocket,
struct label *oldsocketlabel, struct socket *newsocket,
struct label *newsocketpeerlabel)
{
struct mac_biba *source, *dest;
source = SLOT(oldsocketlabel);
dest = SLOT(newsocketpeerlabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d,
struct label *bpflabel)
{
struct mac_biba *source, *dest;
source = SLOT(&cred->cr_label);
dest = SLOT(bpflabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_ifnet(struct ifnet *ifnet, struct label *ifnetlabel)
{
char tifname[IFNAMSIZ], ifname[IFNAMSIZ], *p, *q;
char tiflist[sizeof(trusted_interfaces)];
struct mac_biba *dest;
int len, grade;
dest = SLOT(ifnetlabel);
if (ifnet->if_type == IFT_LOOP) {
grade = MAC_BIBA_TYPE_EQUAL;
goto set;
}
if (trust_all_interfaces) {
grade = MAC_BIBA_TYPE_HIGH;
goto set;
}
grade = MAC_BIBA_TYPE_LOW;
if (trusted_interfaces[0] == '\0' ||
!strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
goto set;
for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
if(*p != ' ' && *p != '\t')
*q = *p;
snprintf(ifname, IFNAMSIZ, "%s%d", ifnet->if_name, ifnet->if_unit);
for (p = q = tiflist;; p++) {
if (*p == ',' || *p == '\0') {
len = p - q;
if (len < IFNAMSIZ) {
bzero(tifname, sizeof(tifname));
bcopy(q, tifname, len);
if (strcmp(tifname, ifname) == 0) {
grade = MAC_BIBA_TYPE_HIGH;
break;
}
}
if (*p == '\0')
break;
q = p + 1;
}
}
set:
mac_biba_set_single(dest, grade, 0, NULL);
mac_biba_set_range(dest, grade, 0, NULL, grade, 0, NULL);
}
static void
mac_biba_create_ipq(struct mbuf *fragment, struct label *fragmentlabel,
struct ipq *ipq, struct label *ipqlabel)
{
struct mac_biba *source, *dest;
source = SLOT(fragmentlabel);
dest = SLOT(ipqlabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_datagram_from_ipq(struct ipq *ipq, struct label *ipqlabel,
struct mbuf *datagram, struct label *datagramlabel)
{
struct mac_biba *source, *dest;
source = SLOT(ipqlabel);
dest = SLOT(datagramlabel);
/* Just use the head, since we require them all to match. */
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_fragment(struct mbuf *datagram, struct label *datagramlabel,
struct mbuf *fragment, struct label *fragmentlabel)
{
struct mac_biba *source, *dest;
source = SLOT(datagramlabel);
dest = SLOT(fragmentlabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_mbuf_from_mbuf(struct mbuf *oldmbuf,
struct label *oldmbuflabel, struct mbuf *newmbuf,
struct label *newmbuflabel)
{
struct mac_biba *source, *dest;
source = SLOT(oldmbuflabel);
dest = SLOT(newmbuflabel);
/*
* Because the source mbuf may not yet have been "created",
* just initialized, we do a conditional copy. Since we don't
* allow mbufs to have ranges, do a KASSERT to make sure that
* doesn't happen.
*/
KASSERT((source->mb_flags & MAC_BIBA_FLAG_RANGE) == 0,
("mac_biba_create_mbuf_from_mbuf: source mbuf has range"));
mac_biba_copy(source, dest);
}
static void
mac_biba_create_mbuf_linklayer(struct ifnet *ifnet, struct label *ifnetlabel,
struct mbuf *mbuf, struct label *mbuflabel)
{
struct mac_biba *dest;
dest = SLOT(mbuflabel);
mac_biba_set_single(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
}
static void
mac_biba_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct label *bpflabel,
struct mbuf *mbuf, struct label *mbuflabel)
{
struct mac_biba *source, *dest;
source = SLOT(bpflabel);
dest = SLOT(mbuflabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_mbuf_from_ifnet(struct ifnet *ifnet, struct label *ifnetlabel,
struct mbuf *m, struct label *mbuflabel)
{
struct mac_biba *source, *dest;
source = SLOT(ifnetlabel);
dest = SLOT(mbuflabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_mbuf_multicast_encap(struct mbuf *oldmbuf,
struct label *oldmbuflabel, struct ifnet *ifnet, struct label *ifnetlabel,
struct mbuf *newmbuf, struct label *newmbuflabel)
{
struct mac_biba *source, *dest;
source = SLOT(oldmbuflabel);
dest = SLOT(newmbuflabel);
mac_biba_copy_single(source, dest);
}
static void
mac_biba_create_mbuf_netlayer(struct mbuf *oldmbuf, struct label *oldmbuflabel,
struct mbuf *newmbuf, struct label *newmbuflabel)
{
struct mac_biba *source, *dest;
source = SLOT(oldmbuflabel);
dest = SLOT(newmbuflabel);
mac_biba_copy_single(source, dest);
}
static int
mac_biba_fragment_match(struct mbuf *fragment, struct label *fragmentlabel,
struct ipq *ipq, struct label *ipqlabel)
{
struct mac_biba *a, *b;
a = SLOT(ipqlabel);
b = SLOT(fragmentlabel);
return (mac_biba_equal_single(a, b));
}
static void
mac_biba_relabel_ifnet(struct ucred *cred, struct ifnet *ifnet,
struct label *ifnetlabel, struct label *newlabel)
{
struct mac_biba *source, *dest;
source = SLOT(newlabel);
dest = SLOT(ifnetlabel);
mac_biba_copy(source, dest);
}
static void
mac_biba_update_ipq(struct mbuf *fragment, struct label *fragmentlabel,
struct ipq *ipq, struct label *ipqlabel)
{
/* NOOP: we only accept matching labels, so no need to update */
}
/*
* Labeling event operations: processes.
*/
static void
mac_biba_create_cred(struct ucred *cred_parent, struct ucred *cred_child)
{
struct mac_biba *source, *dest;
source = SLOT(&cred_parent->cr_label);
dest = SLOT(&cred_child->cr_label);
mac_biba_copy_single(source, dest);
mac_biba_copy_range(source, dest);
}
static void
mac_biba_execve_transition(struct ucred *old, struct ucred *new,
struct vnode *vp, struct mac *vnodelabel)
{
struct mac_biba *source, *dest;
source = SLOT(&old->cr_label);
dest = SLOT(&new->cr_label);
mac_biba_copy_single(source, dest);
mac_biba_copy_range(source, dest);
}
static int
mac_biba_execve_will_transition(struct ucred *old, struct vnode *vp,
struct mac *vnodelabel)
{
return (0);
}
static void
mac_biba_create_proc0(struct ucred *cred)
{
struct mac_biba *dest;
dest = SLOT(&cred->cr_label);
mac_biba_set_single(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
mac_biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL,
MAC_BIBA_TYPE_HIGH, 0, NULL);
}
static void
mac_biba_create_proc1(struct ucred *cred)
{
struct mac_biba *dest;
dest = SLOT(&cred->cr_label);
mac_biba_set_single(dest, MAC_BIBA_TYPE_HIGH, 0, NULL);
mac_biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL,
MAC_BIBA_TYPE_HIGH, 0, NULL);
}
static void
mac_biba_relabel_cred(struct ucred *cred, struct label *newlabel)
{
struct mac_biba *source, *dest;
source = SLOT(newlabel);
dest = SLOT(&cred->cr_label);
mac_biba_copy(source, dest);
}
/*
* Access control checks.
*/
static int
mac_biba_check_bpfdesc_receive(struct bpf_d *bpf_d, struct label *bpflabel,
struct ifnet *ifnet, struct label *ifnetlabel)
{
struct mac_biba *a, *b;
if (!mac_biba_enabled)
return (0);
a = SLOT(bpflabel);
b = SLOT(ifnetlabel);
if (mac_biba_equal_single(a, b))
return (0);
return (EACCES);
}
static int
mac_biba_check_cred_relabel(struct ucred *cred, struct label *newlabel)
{
struct mac_biba *subj, *new;
int error;
subj = SLOT(&cred->cr_label);
new = SLOT(newlabel);
/*
* If there is a Biba label update for the credential, it may
* be an update of the single, range, or both.
*/
error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
if (error)
return (error);
/*
* If the Biba label is to be changed, authorize as appropriate.
*/
if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
/*
* To change the Biba single label on a credential, the
* new single label must be in the current range.
*/
if (new->mb_flags & MAC_BIBA_FLAG_SINGLE &&
!mac_biba_single_in_range(new, subj))
return (EPERM);
/*
* To change the Biba range on a credential, the new
* range label must be in the current range.
*/
if (new->mb_flags & MAC_BIBA_FLAG_RANGE &&
!mac_biba_range_in_range(new, subj))
return (EPERM);
/*
* To have EQUAL in any component of the new credential
* Biba label, the subject must already have EQUAL in
* their label.
*/
if (mac_biba_contains_equal(new)) {
error = mac_biba_subject_equal_ok(subj);
if (error)
return (error);
}
/*
* XXXMAC: Additional consistency tests regarding the
* single and range of the new label might be performed
* here.
*/
}
return (0);
}
static int
mac_biba_check_cred_visible(struct ucred *u1, struct ucred *u2)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&u1->cr_label);
obj = SLOT(&u2->cr_label);
/* XXX: range */
if (!mac_biba_dominate_single(obj, subj))
return (ESRCH);
return (0);
}
static int
mac_biba_check_ifnet_relabel(struct ucred *cred, struct ifnet *ifnet,
struct label *ifnetlabel, struct label *newlabel)
{
struct mac_biba *subj, *new;
int error;
subj = SLOT(&cred->cr_label);
new = SLOT(newlabel);
/*
* If there is a Biba label update for the interface, it may
* be an update of the single, range, or both.
*/
error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
if (error)
return (error);
/*
* If the Biba label is to be changed, authorize as appropriate.
*/
if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
/*
* Rely on the traditional superuser status for the Biba
* interface relabel requirements. XXXMAC: This will go
* away.
*/
error = suser_cred(cred, 0);
if (error)
return (EPERM);
/*
* XXXMAC: Additional consistency tests regarding the single
* and the range of the new label might be performed here.
*/
}
return (0);
}
static int
mac_biba_check_ifnet_transmit(struct ifnet *ifnet, struct label *ifnetlabel,
struct mbuf *m, struct label *mbuflabel)
{
struct mac_biba *p, *i;
if (!mac_biba_enabled)
return (0);
p = SLOT(mbuflabel);
i = SLOT(ifnetlabel);
return (mac_biba_single_in_range(p, i) ? 0 : EACCES);
}
static int
mac_biba_check_mount_stat(struct ucred *cred, struct mount *mp,
struct label *mntlabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(mntlabel);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel, unsigned long cmd, void /* caddr_t */ *data)
{
if(!mac_biba_enabled)
return (0);
/* XXX: This will be implemented soon... */
return (0);
}
static int
mac_biba_check_pipe_poll(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT((pipelabel));
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_pipe_read(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT((pipelabel));
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_pipe_relabel(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel, struct label *newlabel)
{
struct mac_biba *subj, *obj, *new;
int error;
new = SLOT(newlabel);
subj = SLOT(&cred->cr_label);
obj = SLOT(pipelabel);
/*
* If there is a Biba label update for a pipe, it must be a
* single update.
*/
error = biba_atmostflags(new, MAC_BIBA_FLAG_SINGLE);
if (error)
return (error);
/*
* To perform a relabel of a pipe (Biba label or not), Biba must
* authorize the relabel.
*/
if (!mac_biba_single_in_range(obj, subj))
return (EPERM);
/*
* If the Biba label is to be changed, authorize as appropriate.
*/
if (new->mb_flags & MAC_BIBA_FLAG_SINGLE) {
/*
* To change the Biba label on a pipe, the new pipe label
* must be in the subject range.
*/
if (!mac_biba_single_in_range(new, subj))
return (EPERM);
/*
* To change the Biba label on a pipe to be EQUAL, the
* subject must have appropriate privilege.
*/
if (mac_biba_contains_equal(new)) {
error = mac_biba_subject_equal_ok(subj);
if (error)
return (error);
}
}
return (0);
}
static int
mac_biba_check_pipe_stat(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT((pipelabel));
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_pipe_write(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT((pipelabel));
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_proc_debug(struct ucred *cred, struct proc *proc)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(&proc->p_ucred->cr_label);
/* XXX: range checks */
if (!mac_biba_dominate_single(obj, subj))
return (ESRCH);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_proc_sched(struct ucred *cred, struct proc *proc)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(&proc->p_ucred->cr_label);
/* XXX: range checks */
if (!mac_biba_dominate_single(obj, subj))
return (ESRCH);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_proc_signal(struct ucred *cred, struct proc *proc, int signum)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(&proc->p_ucred->cr_label);
/* XXX: range checks */
if (!mac_biba_dominate_single(obj, subj))
return (ESRCH);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_socket_deliver(struct socket *so, struct label *socketlabel,
struct mbuf *m, struct label *mbuflabel)
{
struct mac_biba *p, *s;
if (!mac_biba_enabled)
return (0);
p = SLOT(mbuflabel);
s = SLOT(socketlabel);
return (mac_biba_equal_single(p, s) ? 0 : EACCES);
}
static int
mac_biba_check_socket_relabel(struct ucred *cred, struct socket *socket,
struct label *socketlabel, struct label *newlabel)
{
struct mac_biba *subj, *obj, *new;
int error;
new = SLOT(newlabel);
subj = SLOT(&cred->cr_label);
obj = SLOT(socketlabel);
/*
* If there is a Biba label update for the socket, it may be
* an update of single.
*/
error = biba_atmostflags(new, MAC_BIBA_FLAG_SINGLE);
if (error)
return (error);
/*
* To relabel a socket, the old socket single must be in the subject
* range.
*/
if (!mac_biba_single_in_range(obj, subj))
return (EPERM);
/*
* If the Biba label is to be changed, authorize as appropriate.
*/
if (new->mb_flags & MAC_BIBA_FLAG_SINGLE) {
/*
* To relabel a socket, the new socket single must be in
* the subject range.
*/
if (!mac_biba_single_in_range(new, subj))
return (EPERM);
/*
* To change the Biba label on the socket to contain EQUAL,
* the subject must have appropriate privilege.
*/
if (mac_biba_contains_equal(new)) {
error = mac_biba_subject_equal_ok(subj);
if (error)
return (error);
}
}
return (0);
}
static int
mac_biba_check_socket_visible(struct ucred *cred, struct socket *socket,
struct label *socketlabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(socketlabel);
if (!mac_biba_dominate_single(obj, subj))
return (ENOENT);
return (0);
}
static int
mac_biba_check_vnode_chdir(struct ucred *cred, struct vnode *dvp,
struct label *dlabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_chroot(struct ucred *cred, struct vnode *dvp,
struct label *dlabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_create(struct ucred *cred, struct vnode *dvp,
struct label *dlabel, struct componentname *cnp, struct vattr *vap)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_delete(struct ucred *cred, struct vnode *dvp,
struct label *dlabel, struct vnode *vp, struct label *label,
struct componentname *cnp)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
struct label *label, acl_type_t type)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_exec(struct ucred *cred, struct vnode *vp,
struct label *label)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_getacl(struct ucred *cred, struct vnode *vp,
struct label *label, acl_type_t type)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
struct label *label, int attrnamespace, const char *name, struct uio *uio)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_link(struct ucred *cred, struct vnode *dvp,
struct label *dlabel, struct vnode *vp, struct label *label,
struct componentname *cnp)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
struct label *dlabel, struct componentname *cnp)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
struct label *label, int prot)
{
struct mac_biba *subj, *obj;
/*
* Rely on the use of open()-time protections to handle
* non-revocation cases.
*/
if (!mac_biba_enabled || !revocation_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
}
if (prot & VM_PROT_WRITE) {
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
}
return (0);
}
static int
mac_biba_check_vnode_open(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, mode_t acc_mode)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(vnodelabel);
/* XXX privilege override for admin? */
if (acc_mode & (VREAD | VEXEC | VSTAT)) {
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
}
if (acc_mode & (VWRITE | VAPPEND | VADMIN)) {
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
}
return (0);
}
static int
mac_biba_check_vnode_poll(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp, struct label *label)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled || !revocation_enabled)
return (0);
subj = SLOT(&active_cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp, struct label *label)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled || !revocation_enabled)
return (0);
subj = SLOT(&active_cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_readdir(struct ucred *cred, struct vnode *dvp,
struct label *dlabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_readlink(struct ucred *cred, struct vnode *vp,
struct label *label)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_relabel(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, struct label *newlabel)
{
struct mac_biba *old, *new, *subj;
int error;
old = SLOT(vnodelabel);
new = SLOT(newlabel);
subj = SLOT(&cred->cr_label);
/*
* If there is a Biba label update for the vnode, it must be a
* single label.
*/
error = biba_atmostflags(new, MAC_BIBA_FLAG_SINGLE);
if (error)
return (error);
/*
* To perform a relabel of the vnode (Biba label or not), Biba must
* authorize the relabel.
*/
if (!mac_biba_single_in_range(old, subj))
return (EPERM);
/*
* If the Biba label is to be changed, authorize as appropriate.
*/
if (new->mb_flags & MAC_BIBA_FLAG_SINGLE) {
/*
* To change the Biba label on a vnode, the new vnode label
* must be in the subject range.
*/
if (!mac_biba_single_in_range(new, subj))
return (EPERM);
/*
* To change the Biba label on the vnode to be EQUAL,
* the subject must have appropriate privilege.
*/
if (mac_biba_contains_equal(new)) {
error = mac_biba_subject_equal_ok(subj);
if (error)
return (error);
}
}
return (0);
}
static int
mac_biba_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
struct label *dlabel, struct vnode *vp, struct label *label,
struct componentname *cnp)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
struct label *dlabel, struct vnode *vp, struct label *label, int samedir,
struct componentname *cnp)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(dlabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
if (vp != NULL) {
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
}
return (0);
}
static int
mac_biba_check_vnode_revoke(struct ucred *cred, struct vnode *vp,
struct label *label)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
struct label *label, acl_type_t type, struct acl *acl)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, int attrnamespace, const char *name,
struct uio *uio)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(vnodelabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
/* XXX: protect the MAC EA in a special way? */
return (0);
}
static int
mac_biba_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, u_long flags)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(vnodelabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, mode_t mode)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(vnodelabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, uid_t uid, gid_t gid)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(vnodelabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, struct timespec atime, struct timespec mtime)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&cred->cr_label);
obj = SLOT(vnodelabel);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_stat(struct ucred *active_cred, struct ucred *file_cred,
struct vnode *vp, struct label *vnodelabel)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled)
return (0);
subj = SLOT(&active_cred->cr_label);
obj = SLOT(vnodelabel);
if (!mac_biba_dominate_single(obj, subj))
return (EACCES);
return (0);
}
static int
mac_biba_check_vnode_write(struct ucred *active_cred,
struct ucred *file_cred, struct vnode *vp, struct label *label)
{
struct mac_biba *subj, *obj;
if (!mac_biba_enabled || !revocation_enabled)
return (0);
subj = SLOT(&active_cred->cr_label);
obj = SLOT(label);
if (!mac_biba_dominate_single(subj, obj))
return (EACCES);
return (0);
}
static struct mac_policy_op_entry mac_biba_ops[] =
{
{ MAC_DESTROY,
(macop_t)mac_biba_destroy },
{ MAC_INIT,
(macop_t)mac_biba_init },
{ MAC_INIT_BPFDESC_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_CRED_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_DEVFSDIRENT_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_IFNET_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_IPQ_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_MBUF_LABEL,
(macop_t)mac_biba_init_label_waitcheck },
{ MAC_INIT_MOUNT_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_MOUNT_FS_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_PIPE_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_INIT_SOCKET_LABEL,
(macop_t)mac_biba_init_label_waitcheck },
{ MAC_INIT_SOCKET_PEER_LABEL,
(macop_t)mac_biba_init_label_waitcheck },
{ MAC_INIT_VNODE_LABEL,
(macop_t)mac_biba_init_label },
{ MAC_DESTROY_BPFDESC_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_CRED_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_DEVFSDIRENT_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_IFNET_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_IPQ_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_MBUF_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_MOUNT_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_MOUNT_FS_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_PIPE_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_SOCKET_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_SOCKET_PEER_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_DESTROY_VNODE_LABEL,
(macop_t)mac_biba_destroy_label },
{ MAC_COPY_PIPE_LABEL,
(macop_t)mac_biba_copy_label },
{ MAC_COPY_VNODE_LABEL,
(macop_t)mac_biba_copy_label },
{ MAC_EXTERNALIZE_CRED_LABEL,
(macop_t)mac_biba_externalize_label },
{ MAC_EXTERNALIZE_IFNET_LABEL,
(macop_t)mac_biba_externalize_label },
{ MAC_EXTERNALIZE_PIPE_LABEL,
(macop_t)mac_biba_externalize_label },
{ MAC_EXTERNALIZE_SOCKET_LABEL,
(macop_t)mac_biba_externalize_label },
{ MAC_EXTERNALIZE_SOCKET_PEER_LABEL,
(macop_t)mac_biba_externalize_label },
{ MAC_EXTERNALIZE_VNODE_LABEL,
(macop_t)mac_biba_externalize_label },
{ MAC_EXTERNALIZE_VNODE_OLDMAC,
(macop_t)mac_biba_externalize_vnode_oldmac },
{ MAC_INTERNALIZE_CRED_LABEL,
(macop_t)mac_biba_internalize_label },
{ MAC_INTERNALIZE_IFNET_LABEL,
(macop_t)mac_biba_internalize_label },
{ MAC_INTERNALIZE_PIPE_LABEL,
(macop_t)mac_biba_internalize_label },
{ MAC_INTERNALIZE_SOCKET_LABEL,
(macop_t)mac_biba_internalize_label },
{ MAC_INTERNALIZE_VNODE_LABEL,
(macop_t)mac_biba_internalize_label },
{ MAC_CREATE_DEVFS_DEVICE,
(macop_t)mac_biba_create_devfs_device },
{ MAC_CREATE_DEVFS_DIRECTORY,
(macop_t)mac_biba_create_devfs_directory },
{ MAC_CREATE_DEVFS_SYMLINK,
(macop_t)mac_biba_create_devfs_symlink },
{ MAC_CREATE_DEVFS_VNODE,
(macop_t)mac_biba_create_devfs_vnode },
{ MAC_CREATE_VNODE,
(macop_t)mac_biba_create_vnode },
{ MAC_CREATE_MOUNT,
(macop_t)mac_biba_create_mount },
{ MAC_CREATE_ROOT_MOUNT,
(macop_t)mac_biba_create_root_mount },
{ MAC_RELABEL_VNODE,
(macop_t)mac_biba_relabel_vnode },
{ MAC_UPDATE_DEVFSDIRENT,
(macop_t)mac_biba_update_devfsdirent },
{ MAC_UPDATE_PROCFSVNODE,
(macop_t)mac_biba_update_procfsvnode },
{ MAC_UPDATE_VNODE_FROM_EXTERNALIZED,
(macop_t)mac_biba_update_vnode_from_externalized },
{ MAC_UPDATE_VNODE_FROM_MOUNT,
(macop_t)mac_biba_update_vnode_from_mount },
{ MAC_CREATE_MBUF_FROM_SOCKET,
(macop_t)mac_biba_create_mbuf_from_socket },
{ MAC_CREATE_PIPE,
(macop_t)mac_biba_create_pipe },
{ MAC_CREATE_SOCKET,
(macop_t)mac_biba_create_socket },
{ MAC_CREATE_SOCKET_FROM_SOCKET,
(macop_t)mac_biba_create_socket_from_socket },
{ MAC_RELABEL_PIPE,
(macop_t)mac_biba_relabel_pipe },
{ MAC_RELABEL_SOCKET,
(macop_t)mac_biba_relabel_socket },
{ MAC_SET_SOCKET_PEER_FROM_MBUF,
(macop_t)mac_biba_set_socket_peer_from_mbuf },
{ MAC_SET_SOCKET_PEER_FROM_SOCKET,
(macop_t)mac_biba_set_socket_peer_from_socket },
{ MAC_CREATE_BPFDESC,
(macop_t)mac_biba_create_bpfdesc },
{ MAC_CREATE_DATAGRAM_FROM_IPQ,
(macop_t)mac_biba_create_datagram_from_ipq },
{ MAC_CREATE_FRAGMENT,
(macop_t)mac_biba_create_fragment },
{ MAC_CREATE_IFNET,
(macop_t)mac_biba_create_ifnet },
{ MAC_CREATE_IPQ,
(macop_t)mac_biba_create_ipq },
{ MAC_CREATE_MBUF_FROM_MBUF,
(macop_t)mac_biba_create_mbuf_from_mbuf },
{ MAC_CREATE_MBUF_LINKLAYER,
(macop_t)mac_biba_create_mbuf_linklayer },
{ MAC_CREATE_MBUF_FROM_BPFDESC,
(macop_t)mac_biba_create_mbuf_from_bpfdesc },
{ MAC_CREATE_MBUF_FROM_IFNET,
(macop_t)mac_biba_create_mbuf_from_ifnet },
{ MAC_CREATE_MBUF_MULTICAST_ENCAP,
(macop_t)mac_biba_create_mbuf_multicast_encap },
{ MAC_CREATE_MBUF_NETLAYER,
(macop_t)mac_biba_create_mbuf_netlayer },
{ MAC_FRAGMENT_MATCH,
(macop_t)mac_biba_fragment_match },
{ MAC_RELABEL_IFNET,
(macop_t)mac_biba_relabel_ifnet },
{ MAC_UPDATE_IPQ,
(macop_t)mac_biba_update_ipq },
{ MAC_CREATE_CRED,
(macop_t)mac_biba_create_cred },
{ MAC_EXECVE_TRANSITION,
(macop_t)mac_biba_execve_transition },
{ MAC_EXECVE_WILL_TRANSITION,
(macop_t)mac_biba_execve_will_transition },
{ MAC_CREATE_PROC0,
(macop_t)mac_biba_create_proc0 },
{ MAC_CREATE_PROC1,
(macop_t)mac_biba_create_proc1 },
{ MAC_RELABEL_CRED,
(macop_t)mac_biba_relabel_cred },
{ MAC_CHECK_BPFDESC_RECEIVE,
(macop_t)mac_biba_check_bpfdesc_receive },
{ MAC_CHECK_CRED_RELABEL,
(macop_t)mac_biba_check_cred_relabel },
{ MAC_CHECK_CRED_VISIBLE,
(macop_t)mac_biba_check_cred_visible },
{ MAC_CHECK_IFNET_RELABEL,
(macop_t)mac_biba_check_ifnet_relabel },
{ MAC_CHECK_IFNET_TRANSMIT,
(macop_t)mac_biba_check_ifnet_transmit },
{ MAC_CHECK_MOUNT_STAT,
(macop_t)mac_biba_check_mount_stat },
{ MAC_CHECK_PIPE_IOCTL,
(macop_t)mac_biba_check_pipe_ioctl },
{ MAC_CHECK_PIPE_POLL,
(macop_t)mac_biba_check_pipe_poll },
{ MAC_CHECK_PIPE_READ,
(macop_t)mac_biba_check_pipe_read },
{ MAC_CHECK_PIPE_RELABEL,
(macop_t)mac_biba_check_pipe_relabel },
{ MAC_CHECK_PIPE_STAT,
(macop_t)mac_biba_check_pipe_stat },
{ MAC_CHECK_PIPE_WRITE,
(macop_t)mac_biba_check_pipe_write },
{ MAC_CHECK_PROC_DEBUG,
(macop_t)mac_biba_check_proc_debug },
{ MAC_CHECK_PROC_SCHED,
(macop_t)mac_biba_check_proc_sched },
{ MAC_CHECK_PROC_SIGNAL,
(macop_t)mac_biba_check_proc_signal },
{ MAC_CHECK_SOCKET_DELIVER,
(macop_t)mac_biba_check_socket_deliver },
{ MAC_CHECK_SOCKET_RELABEL,
(macop_t)mac_biba_check_socket_relabel },
{ MAC_CHECK_SOCKET_VISIBLE,
(macop_t)mac_biba_check_socket_visible },
{ MAC_CHECK_VNODE_ACCESS,
(macop_t)mac_biba_check_vnode_open },
{ MAC_CHECK_VNODE_CHDIR,
(macop_t)mac_biba_check_vnode_chdir },
{ MAC_CHECK_VNODE_CHROOT,
(macop_t)mac_biba_check_vnode_chroot },
{ MAC_CHECK_VNODE_CREATE,
(macop_t)mac_biba_check_vnode_create },
{ MAC_CHECK_VNODE_DELETE,
(macop_t)mac_biba_check_vnode_delete },
{ MAC_CHECK_VNODE_DELETEACL,
(macop_t)mac_biba_check_vnode_deleteacl },
{ MAC_CHECK_VNODE_EXEC,
(macop_t)mac_biba_check_vnode_exec },
{ MAC_CHECK_VNODE_GETACL,
(macop_t)mac_biba_check_vnode_getacl },
{ MAC_CHECK_VNODE_GETEXTATTR,
(macop_t)mac_biba_check_vnode_getextattr },
{ MAC_CHECK_VNODE_LINK,
(macop_t)mac_biba_check_vnode_link },
{ MAC_CHECK_VNODE_LOOKUP,
(macop_t)mac_biba_check_vnode_lookup },
{ MAC_CHECK_VNODE_MMAP,
(macop_t)mac_biba_check_vnode_mmap },
{ MAC_CHECK_VNODE_MPROTECT,
(macop_t)mac_biba_check_vnode_mmap },
{ MAC_CHECK_VNODE_OPEN,
(macop_t)mac_biba_check_vnode_open },
{ MAC_CHECK_VNODE_POLL,
(macop_t)mac_biba_check_vnode_poll },
{ MAC_CHECK_VNODE_READ,
(macop_t)mac_biba_check_vnode_read },
{ MAC_CHECK_VNODE_READDIR,
(macop_t)mac_biba_check_vnode_readdir },
{ MAC_CHECK_VNODE_READLINK,
(macop_t)mac_biba_check_vnode_readlink },
{ MAC_CHECK_VNODE_RELABEL,
(macop_t)mac_biba_check_vnode_relabel },
{ MAC_CHECK_VNODE_RENAME_FROM,
(macop_t)mac_biba_check_vnode_rename_from },
{ MAC_CHECK_VNODE_RENAME_TO,
(macop_t)mac_biba_check_vnode_rename_to },
{ MAC_CHECK_VNODE_REVOKE,
(macop_t)mac_biba_check_vnode_revoke },
{ MAC_CHECK_VNODE_SETACL,
(macop_t)mac_biba_check_vnode_setacl },
{ MAC_CHECK_VNODE_SETEXTATTR,
(macop_t)mac_biba_check_vnode_setextattr },
{ MAC_CHECK_VNODE_SETFLAGS,
(macop_t)mac_biba_check_vnode_setflags },
{ MAC_CHECK_VNODE_SETMODE,
(macop_t)mac_biba_check_vnode_setmode },
{ MAC_CHECK_VNODE_SETOWNER,
(macop_t)mac_biba_check_vnode_setowner },
{ MAC_CHECK_VNODE_SETUTIMES,
(macop_t)mac_biba_check_vnode_setutimes },
{ MAC_CHECK_VNODE_STAT,
(macop_t)mac_biba_check_vnode_stat },
{ MAC_CHECK_VNODE_WRITE,
(macop_t)mac_biba_check_vnode_write },
{ MAC_OP_LAST, NULL }
};
MAC_POLICY_SET(mac_biba_ops, trustedbsd_mac_biba, "TrustedBSD MAC/Biba",
MPC_LOADTIME_FLAG_NOTLATE, &mac_biba_slot);
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