763bbd2f4f
"refreshing" the label on the vnode before use, just get the label right from inception. For single-label file systems, set the label in the generic VFS getnewvnode() code; for multi-label file systems, leave the labeling up to the file system. With UFS1/2, this means reading the extended attribute during vfs_vget() as the inode is pulled off disk, rather than hitting the extended attributes frequently during operations later, improving performance. This also corrects sematics for shared vnode locks, which were not previously present in the system. This chances the cache coherrency properties WRT out-of-band access to label data, but in an acceptable form. With UFS1, there is a small race condition during automatic extended attribute start -- this is not present with UFS2, and occurs because EAs aren't available at vnode inception. We'll introduce a work around for this shortly. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2705 lines
63 KiB
C
2705 lines
63 KiB
C
/*-
|
|
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
|
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* Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by NAI Labs,
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* the Security Research Division of Network Associates, Inc. under
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* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
|
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* CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
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* are met:
|
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* 1. Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
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* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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|
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/*
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* Developed by the TrustedBSD Project.
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* Biba fixed label mandatory integrity policy.
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*/
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|
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/acl.h>
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#include <sys/conf.h>
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#include <sys/extattr.h>
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#include <sys/kernel.h>
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#include <sys/mac.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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|
#include <sys/sysent.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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|
#include <sys/file.h>
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|
#include <sys/socket.h>
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|
#include <sys/socketvar.h>
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|
#include <sys/pipe.h>
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|
#include <sys/sysctl.h>
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|
|
|
#include <fs/devfs/devfs.h>
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|
|
|
#include <net/bpfdesc.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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|
|
|
#include <netinet/in.h>
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#include <netinet/ip_var.h>
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|
|
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#include <vm/vm.h>
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|
|
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#include <sys/mac_policy.h>
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#include <security/mac_biba/mac_biba.h>
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|
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SYSCTL_DECL(_security_mac);
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SYSCTL_NODE(_security_mac, OID_AUTO, biba, CTLFLAG_RW, 0,
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"TrustedBSD mac_biba policy controls");
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|
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static int mac_biba_label_size = sizeof(struct mac_biba);
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SYSCTL_INT(_security_mac_biba, OID_AUTO, label_size, CTLFLAG_RD,
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&mac_biba_label_size, 0, "Size of struct mac_biba");
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|
|
|
static int mac_biba_enabled = 0;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RW,
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&mac_biba_enabled, 0, "Enforce MAC/Biba policy");
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TUNABLE_INT("security.mac.biba.enabled", &mac_biba_enabled);
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|
|
|
static int destroyed_not_inited;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
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&destroyed_not_inited, 0, "Count of labels destroyed but not inited");
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|
|
|
static int trust_all_interfaces = 0;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
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&trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/Biba");
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TUNABLE_INT("security.mac.biba.trust_all_interfaces", &trust_all_interfaces);
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|
|
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static char trusted_interfaces[128];
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SYSCTL_STRING(_security_mac_biba, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
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trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/Biba");
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TUNABLE_STR("security.mac.biba.trusted_interfaces", trusted_interfaces,
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sizeof(trusted_interfaces));
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|
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static int max_compartments = MAC_BIBA_MAX_COMPARTMENTS;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, max_compartments, CTLFLAG_RD,
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&max_compartments, 0, "Maximum supported compartments");
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|
|
|
static int ptys_equal = 0;
|
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SYSCTL_INT(_security_mac_biba, OID_AUTO, ptys_equal, CTLFLAG_RW,
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&ptys_equal, 0, "Label pty devices as biba/equal on create");
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TUNABLE_INT("security.mac.biba.ptys_equal", &ptys_equal);
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|
|
|
static int revocation_enabled = 0;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RW,
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&revocation_enabled, 0, "Revoke access to objects on relabel");
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TUNABLE_INT("security.mac.biba.revocation_enabled", &revocation_enabled);
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|
|
|
static int mac_biba_slot;
|
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#define SLOT(l) ((struct mac_biba *)LABEL_TO_SLOT((l), mac_biba_slot).l_ptr)
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|
|
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MALLOC_DEFINE(M_MACBIBA, "biba label", "MAC/Biba labels");
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|
|
static __inline int
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biba_bit_set_empty(u_char *set) {
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int i;
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|
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for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
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if (set[i] != 0)
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return (0);
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return (1);
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}
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static struct mac_biba *
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biba_alloc(int flag)
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{
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struct mac_biba *mac_biba;
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|
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mac_biba = malloc(sizeof(struct mac_biba), M_MACBIBA, M_ZERO | flag);
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|
return (mac_biba);
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}
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|
|
|
static void
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biba_free(struct mac_biba *mac_biba)
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|
{
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if (mac_biba != NULL)
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free(mac_biba, M_MACBIBA);
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else
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atomic_add_int(&destroyed_not_inited, 1);
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}
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static int
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biba_atmostflags(struct mac_biba *mac_biba, int flags)
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|
{
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|
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if ((mac_biba->mb_flags & flags) != mac_biba->mb_flags)
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return (EINVAL);
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return (0);
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}
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static int
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|
mac_biba_dominate_element(struct mac_biba_element *a,
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struct mac_biba_element *b)
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|
{
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|
int bit;
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|
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|
switch (a->mbe_type) {
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case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_HIGH:
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return (1);
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|
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|
case MAC_BIBA_TYPE_LOW:
|
|
switch (b->mbe_type) {
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case MAC_BIBA_TYPE_GRADE:
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|
case MAC_BIBA_TYPE_HIGH:
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|
return (0);
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|
|
|
case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_LOW:
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return (1);
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|
default:
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panic("mac_biba_dominate_element: b->mbe_type invalid");
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}
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case MAC_BIBA_TYPE_GRADE:
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|
switch (b->mbe_type) {
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case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_LOW:
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return (1);
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case MAC_BIBA_TYPE_HIGH:
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|
return (0);
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|
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|
case MAC_BIBA_TYPE_GRADE:
|
|
for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++)
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if (!MAC_BIBA_BIT_TEST(bit,
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a->mbe_compartments) &&
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|
MAC_BIBA_BIT_TEST(bit, b->mbe_compartments))
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|
return (0);
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return (a->mbe_grade >= b->mbe_grade);
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default:
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panic("mac_biba_dominate_element: b->mbe_type invalid");
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}
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default:
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panic("mac_biba_dominate_element: a->mbe_type invalid");
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}
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|
return (0);
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}
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static int
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|
mac_biba_subject_dominate_high(struct mac_biba *mac_biba)
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|
{
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|
struct mac_biba_element *element;
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|
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|
KASSERT((mac_biba->mb_single->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_single_in_range: mac_biba not single"));
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element = &mac_biba->mb_single;
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|
return (element->mbe_type == MAC_BIBA_TYPE_EQUAL ||
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element->mbe_type == MAC_BIBA_TYPE_HIGH);
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|
}
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|
|
static int
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mac_biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
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|
{
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return (mac_biba_dominate_element(&rangeb->mb_rangehigh,
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&rangea->mb_rangehigh) &&
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mac_biba_dominate_element(&rangea->mb_rangelow,
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&rangeb->mb_rangelow));
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}
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static int
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mac_biba_single_in_range(struct mac_biba *single, struct mac_biba *range)
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{
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KASSERT((single->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_single_in_range: a not single"));
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KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
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("mac_biba_single_in_range: b not range"));
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return (mac_biba_dominate_element(&range->mb_rangehigh,
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&single->mb_single) &&
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mac_biba_dominate_element(&single->mb_single,
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&range->mb_rangelow));
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return (1);
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}
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static int
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mac_biba_dominate_single(struct mac_biba *a, struct mac_biba *b)
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{
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KASSERT((a->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_dominate_single: a not single"));
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KASSERT((b->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_dominate_single: b not single"));
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return (mac_biba_dominate_element(&a->mb_single, &b->mb_single));
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}
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|
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static int
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mac_biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
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|
{
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|
|
|
if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
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b->mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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|
|
return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
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}
|
|
|
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static int
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mac_biba_equal_single(struct mac_biba *a, struct mac_biba *b)
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{
|
|
|
|
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)
|
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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);
|
|
}
|
|
|
|
mac_biba_high_single(struct mac_biba *mac_biba)
|
|
{
|
|
|
|
KASSERT((mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
|
|
("mac_biba_equal_single: mac_biba not single"));
|
|
|
|
return (mac_biba->mb_single.mbe_type == MAC_BIBA_TYPE_HIGH);
|
|
}
|
|
|
|
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_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_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_associate_vnode_devfs(struct mount *mp, struct label *fslabel,
|
|
struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
|
|
struct label *vlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(delabel);
|
|
dest = SLOT(vlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_biba_associate_vnode_extattr(struct mount *mp, struct label *fslabel,
|
|
struct vnode *vp, struct label *vlabel)
|
|
{
|
|
struct mac_biba temp, *source, *dest;
|
|
size_t buflen;
|
|
int error;
|
|
|
|
source = SLOT(fslabel);
|
|
dest = SLOT(vlabel);
|
|
|
|
buflen = sizeof(temp);
|
|
bzero(&temp, buflen);
|
|
|
|
error = vn_extattr_get(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
|
|
MAC_BIBA_EXTATTR_NAME, &buflen, (char *) &temp, curthread);
|
|
if (error == ENOATTR || error == EOPNOTSUPP) {
|
|
/* Fall back to the fslabel. */
|
|
mac_biba_copy_single(source, dest);
|
|
return (0);
|
|
} else if (error)
|
|
return (error);
|
|
|
|
if (buflen != sizeof(temp)) {
|
|
printf("mac_biba_associate_vnode_extattr: bad size %d\n",
|
|
buflen);
|
|
return (EPERM);
|
|
}
|
|
if (mac_biba_valid(&temp) != 0) {
|
|
printf("mac_biba_associate_vnode_extattr: invalid\n");
|
|
return (EPERM);
|
|
}
|
|
if ((temp.mb_flags & MAC_BIBA_FLAGS_BOTH) != MAC_BIBA_FLAG_SINGLE) {
|
|
printf("mac_biba_associate_vnode_extattr: not single\n");
|
|
return (EPERM);
|
|
}
|
|
|
|
mac_biba_copy_single(&temp, dest);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_biba_associate_vnode_singlelabel(struct mount *mp,
|
|
struct label *fslabel, struct vnode *vp, struct label *vlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(fslabel);
|
|
dest = SLOT(vlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_biba_create_vnode_extattr(struct ucred *cred, struct mount *mp,
|
|
struct label *fslabel, struct vnode *dvp, struct label *dlabel,
|
|
struct vnode *vp, struct label *vlabel, struct componentname *cnp)
|
|
{
|
|
struct mac_biba *source, *dest, temp;
|
|
size_t buflen;
|
|
int error;
|
|
|
|
buflen = sizeof(temp);
|
|
bzero(&temp, buflen);
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(vlabel);
|
|
mac_biba_copy_single(source, &temp);
|
|
|
|
error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
|
|
MAC_BIBA_EXTATTR_NAME, buflen, (char *) &temp, curthread);
|
|
if (error == 0)
|
|
mac_biba_copy_single(source, dest);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_biba_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vlabel, struct label *intlabel)
|
|
{
|
|
struct mac_biba *source, temp;
|
|
size_t buflen;
|
|
int error;
|
|
|
|
buflen = sizeof(temp);
|
|
bzero(&temp, buflen);
|
|
|
|
source = SLOT(intlabel);
|
|
if ((source->mb_flags & MAC_BIBA_FLAG_SINGLE) == 0)
|
|
return (0);
|
|
|
|
mac_biba_copy_single(source, &temp);
|
|
|
|
error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
|
|
MAC_BIBA_EXTATTR_NAME, buflen, (char *) &temp, curthread);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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_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_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_ASSOCIATE_VNODE_DEVFS,
|
|
(macop_t)mac_biba_associate_vnode_devfs },
|
|
{ MAC_ASSOCIATE_VNODE_EXTATTR,
|
|
(macop_t)mac_biba_associate_vnode_extattr },
|
|
{ MAC_ASSOCIATE_VNODE_SINGLELABEL,
|
|
(macop_t)mac_biba_associate_vnode_singlelabel },
|
|
{ MAC_CREATE_VNODE_EXTATTR,
|
|
(macop_t)mac_biba_create_vnode_extattr },
|
|
{ MAC_SETLABEL_VNODE_EXTATTR,
|
|
(macop_t)mac_biba_setlabel_vnode_extattr },
|
|
{ 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);
|