8315bb904d
wait, rather than the socket label. This avoids reaching up to the socket layer during connection close, which requires locking changes. To do this, introduce MAC Framework entry point mac_create_mbuf_from_inpcb(), which is called from tcp_twrespond() instead of calling mac_create_mbuf_from_socket() or mac_create_mbuf_netlayer(). Introduce MAC Policy entry point mpo_create_mbuf_from_inpcb(), and implementations for various policies, which generally just copy label data from the inpcb to the mbuf. Assert the inpcb lock in the entry point since we require consistency for the inpcb label reference. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2790 lines
65 KiB
C
2790 lines
65 KiB
C
/*-
|
|
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
|
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* Copyright (c) 2001, 2002, 2003 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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*
|
|
* This software was developed for the FreeBSD Project in part by Network
|
|
* Associates Laboratories, the Security Research Division of Network
|
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* 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:
|
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* 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.
|
|
*
|
|
* 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
|
|
* 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
|
|
* 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
|
|
* 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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* 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>
|
|
#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>
|
|
#include <sys/mac.h>
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|
#include <sys/malloc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sbuf.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>
|
|
#include <sys/vnode.h>
|
|
#include <sys/file.h>
|
|
#include <sys/socket.h>
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|
#include <sys/socketvar.h>
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|
#include <sys/pipe.h>
|
|
#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/in_pcb.h>
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|
#include <netinet/ip_var.h>
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|
|
|
#include <vm/uma.h>
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|
#include <vm/vm.h>
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|
|
|
#include <sys/mac_policy.h>
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|
|
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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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|
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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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|
|
|
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 = 1;
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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");
|
|
|
|
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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|
|
|
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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|
|
|
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;
|
|
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);
|
|
|
|
static int mac_biba_slot;
|
|
#define SLOT(l) ((struct mac_biba *)LABEL_TO_SLOT((l), mac_biba_slot).l_ptr)
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|
|
|
static uma_zone_t zone_biba;
|
|
|
|
static __inline int
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|
biba_bit_set_empty(u_char *set) {
|
|
int i;
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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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|
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static struct mac_biba *
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biba_alloc(int flag)
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{
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|
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return (uma_zalloc(zone_biba, flag | M_ZERO));
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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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uma_zfree(zone_biba, mac_biba);
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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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|
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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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|
{
|
|
int bit;
|
|
|
|
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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|
|
|
case MAC_BIBA_TYPE_LOW:
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|
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:
|
|
case MAC_BIBA_TYPE_LOW:
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|
return (1);
|
|
|
|
default:
|
|
panic("mac_biba_dominate_element: b->mbe_type invalid");
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|
}
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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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|
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|
case MAC_BIBA_TYPE_HIGH:
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|
return (0);
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|
|
|
case MAC_BIBA_TYPE_GRADE:
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|
for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++)
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|
if (!MAC_BIBA_BIT_TEST(bit,
|
|
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:
|
|
panic("mac_biba_dominate_element: b->mbe_type invalid");
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|
}
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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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|
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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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|
{
|
|
struct mac_biba_element *element;
|
|
|
|
KASSERT((mac_biba->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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|
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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
|
|
mac_biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
|
|
{
|
|
|
|
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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|
}
|
|
|
|
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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|
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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"));
|
|
|
|
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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|
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|
return (1);
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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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|
{
|
|
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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}
|
|
|
|
static int
|
|
mac_biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
|
|
{
|
|
|
|
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);
|
|
|
|
return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
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|
}
|
|
|
|
static int
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|
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_privileged(struct mac_biba *mac_biba)
|
|
{
|
|
|
|
KASSERT((mac_biba->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
|
|
MAC_BIBA_FLAGS_BOTH,
|
|
("mac_biba_subject_privileged: 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_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_init(struct mac_policy_conf *conf)
|
|
{
|
|
|
|
zone_biba = uma_zcreate("mac_biba", sizeof(struct mac_biba), NULL,
|
|
NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
|
|
}
|
|
|
|
/*
|
|
* 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() accepts an sbuf and Biba element. It
|
|
* converts the Biba element to a string and stores the result in the
|
|
* sbuf; if there isn't space in the sbuf, -1 is returned.
|
|
*/
|
|
static int
|
|
mac_biba_element_to_string(struct sbuf *sb, struct mac_biba_element *element)
|
|
{
|
|
int i, first;
|
|
|
|
switch (element->mbe_type) {
|
|
case MAC_BIBA_TYPE_HIGH:
|
|
return (sbuf_printf(sb, "high"));
|
|
|
|
case MAC_BIBA_TYPE_LOW:
|
|
return (sbuf_printf(sb, "low"));
|
|
|
|
case MAC_BIBA_TYPE_EQUAL:
|
|
return (sbuf_printf(sb, "equal"));
|
|
|
|
case MAC_BIBA_TYPE_GRADE:
|
|
if (sbuf_printf(sb, "%d", element->mbe_grade) == -1)
|
|
return (-1);
|
|
|
|
first = 1;
|
|
for (i = 1; i <= MAC_BIBA_MAX_COMPARTMENTS; i++) {
|
|
if (MAC_BIBA_BIT_TEST(i, element->mbe_compartments)) {
|
|
if (first) {
|
|
if (sbuf_putc(sb, ':') == -1)
|
|
return (-1);
|
|
if (sbuf_printf(sb, "%d", i) == -1)
|
|
return (-1);
|
|
first = 0;
|
|
} else {
|
|
if (sbuf_printf(sb, "+%d", i) == -1)
|
|
return (-1);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
|
|
default:
|
|
panic("mac_biba_element_to_string: invalid type (%d)",
|
|
element->mbe_type);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* mac_biba_to_string() converts a Biba label to a string, and places
|
|
* the results in the passed sbuf. It returns 0 on success, or EINVAL
|
|
* if there isn't room in the sbuf. Note: the sbuf will be modified
|
|
* even in a failure case, so the caller may need to revert the sbuf
|
|
* by restoring the offset if that's undesired.
|
|
*/
|
|
static int
|
|
mac_biba_to_string(struct sbuf *sb, struct mac_biba *mac_biba)
|
|
{
|
|
|
|
if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) {
|
|
if (mac_biba_element_to_string(sb, &mac_biba->mb_single)
|
|
== -1)
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
|
|
if (sbuf_putc(sb, '(') == -1)
|
|
return (EINVAL);
|
|
|
|
if (mac_biba_element_to_string(sb, &mac_biba->mb_rangelow)
|
|
== -1)
|
|
return (EINVAL);
|
|
|
|
if (sbuf_putc(sb, '-') == -1)
|
|
return (EINVAL);
|
|
|
|
if (mac_biba_element_to_string(sb, &mac_biba->mb_rangehigh)
|
|
== -1)
|
|
return (EINVAL);
|
|
|
|
if (sbuf_putc(sb, ')') == -1)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_externalize_label(struct label *label, char *element_name,
|
|
struct sbuf *sb, int *claimed)
|
|
{
|
|
struct mac_biba *mac_biba;
|
|
|
|
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
|
|
return (0);
|
|
|
|
(*claimed)++;
|
|
|
|
mac_biba = SLOT(label);
|
|
return (mac_biba_to_string(sb, mac_biba));
|
|
}
|
|
|
|
static int
|
|
mac_biba_parse_element(struct mac_biba_element *element, char *string)
|
|
{
|
|
char *compartment, *end, *grade;
|
|
int value;
|
|
|
|
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 {
|
|
element->mbe_type = MAC_BIBA_TYPE_GRADE;
|
|
|
|
/*
|
|
* Numeric grade piece of the element.
|
|
*/
|
|
grade = strsep(&string, ":");
|
|
value = strtol(grade, &end, 10);
|
|
if (end == grade || *end != '\0')
|
|
return (EINVAL);
|
|
if (value < 0 || value > 65535)
|
|
return (EINVAL);
|
|
element->mbe_grade = value;
|
|
|
|
/*
|
|
* Optional compartment piece of the element. If none
|
|
* are included, we assume that the label has no
|
|
* compartments.
|
|
*/
|
|
if (string == NULL)
|
|
return (0);
|
|
if (*string == '\0')
|
|
return (0);
|
|
|
|
while ((compartment = strsep(&string, "+")) != NULL) {
|
|
value = strtol(compartment, &end, 10);
|
|
if (compartment == end || *end != '\0')
|
|
return (EINVAL);
|
|
if (value < 1 || value > MAC_BIBA_MAX_COMPARTMENTS)
|
|
return (EINVAL);
|
|
MAC_BIBA_BIT_SET(value, element->mbe_compartments);
|
|
}
|
|
}
|
|
|
|
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 *rangehigh, *rangelow, *single;
|
|
int error;
|
|
|
|
single = strsep(&string, "(");
|
|
if (*single == '\0')
|
|
single = NULL;
|
|
|
|
if (string != NULL) {
|
|
rangelow = strsep(&string, "-");
|
|
if (string == NULL)
|
|
return (EINVAL);
|
|
rangehigh = strsep(&string, ")");
|
|
if (string == NULL)
|
|
return (EINVAL);
|
|
if (*string != '\0')
|
|
return (EINVAL);
|
|
} else {
|
|
rangelow = NULL;
|
|
rangehigh = NULL;
|
|
}
|
|
|
|
KASSERT((rangelow != NULL && rangehigh != NULL) ||
|
|
(rangelow == NULL && rangehigh == NULL),
|
|
("mac_biba_parse: 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(struct mount *mp, 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(struct mount *mp, 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 mount *mp,
|
|
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_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 mount *mp,
|
|
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;
|
|
int buflen, 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_inpcb_from_socket(struct socket *so, struct label *solabel,
|
|
struct inpcb *inp, struct label *inplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(solabel);
|
|
dest = SLOT(inplabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
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], *p, *q;
|
|
char tiflist[sizeof(trusted_interfaces)];
|
|
struct mac_biba *dest;
|
|
int len, type;
|
|
|
|
dest = SLOT(ifnetlabel);
|
|
|
|
if (ifnet->if_type == IFT_LOOP) {
|
|
type = MAC_BIBA_TYPE_EQUAL;
|
|
goto set;
|
|
}
|
|
|
|
if (trust_all_interfaces) {
|
|
type = MAC_BIBA_TYPE_HIGH;
|
|
goto set;
|
|
}
|
|
|
|
type = MAC_BIBA_TYPE_LOW;
|
|
|
|
if (trusted_interfaces[0] == '\0' ||
|
|
!strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
|
|
goto set;
|
|
|
|
bzero(tiflist, sizeof(tiflist));
|
|
for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
|
|
if(*p != ' ' && *p != '\t')
|
|
*q = *p;
|
|
|
|
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, ifnet->if_xname) == 0) {
|
|
type = MAC_BIBA_TYPE_HIGH;
|
|
break;
|
|
}
|
|
} else {
|
|
*p = '\0';
|
|
printf("mac_biba warning: interface name "
|
|
"\"%s\" is too long (must be < %d)\n",
|
|
q, IFNAMSIZ);
|
|
}
|
|
if (*p == '\0')
|
|
break;
|
|
q = p + 1;
|
|
}
|
|
}
|
|
set:
|
|
mac_biba_set_single(dest, type, 0, NULL);
|
|
mac_biba_set_range(dest, type, 0, NULL, type, 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_inpcb(struct inpcb *inp, struct label *inplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(inplabel);
|
|
dest = SLOT(mlabel);
|
|
|
|
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 */
|
|
}
|
|
|
|
static void
|
|
mac_biba_inpcb_sosetlabel(struct socket *so, struct label *solabel,
|
|
struct inpcb *inp, struct label *inplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(solabel);
|
|
dest = SLOT(inplabel);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: processes.
|
|
*/
|
|
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) {
|
|
/*
|
|
* If the change request modifies both the Biba label
|
|
* single and range, check that the new single will be
|
|
* in the new range.
|
|
*/
|
|
if ((new->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
|
|
MAC_BIBA_FLAGS_BOTH &&
|
|
!mac_biba_single_in_range(new, new))
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* 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_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
/*
|
|
* Relabling network interfaces requires Biba privilege.
|
|
*/
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
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_inpcb_deliver(struct inpcb *inp, struct label *inplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *p, *i;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mlabel);
|
|
i = SLOT(inplabel);
|
|
|
|
return (mac_biba_equal_single(p, i) ? 0 : EACCES);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_kld_load(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
obj = SLOT(label);
|
|
if (!mac_biba_high_single(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
static int
|
|
mac_biba_check_kld_unload(struct ucred *cred)
|
|
{
|
|
struct mac_biba *subj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
return (mac_biba_subject_privileged(subj));
|
|
}
|
|
|
|
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_privileged(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 *so,
|
|
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_privileged(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_sysarch_ioperm(struct ucred *cred)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_system_acct(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (label == NULL)
|
|
return (0);
|
|
|
|
obj = SLOT(label);
|
|
if (!mac_biba_high_single(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_system_settime(struct ucred *cred)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_system_swapon(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (!mac_biba_high_single(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_system_swapoff(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_system_sysctl(struct ucred *cred, int *name, u_int namelen,
|
|
void *old, size_t *oldlenp, int inkernel, void *new, size_t newlen)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
/*
|
|
* In general, treat sysctl variables as biba/high, but also
|
|
* require privilege to change them, since they are a
|
|
* communications channel between grades. Exempt MIB
|
|
* queries from this due to undocmented sysctl magic.
|
|
* XXXMAC: This probably requires some more review.
|
|
*/
|
|
if (new != NULL) {
|
|
if (namelen > 0 && name[0] == 0)
|
|
return (0);
|
|
|
|
if (!mac_biba_subject_dominate_high(subj))
|
|
return (EACCES);
|
|
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
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_deleteextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, int attrnamespace, const char *name)
|
|
{
|
|
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 image_params *imgp,
|
|
struct label *execlabel)
|
|
{
|
|
struct mac_biba *subj, *obj, *exec;
|
|
int error;
|
|
|
|
if (execlabel != NULL) {
|
|
/*
|
|
* We currently don't permit labels to be changed at
|
|
* exec-time as part of Biba, so disallow non-NULL
|
|
* Biba label elements in the execlabel.
|
|
*/
|
|
exec = SLOT(execlabel);
|
|
error = biba_atmostflags(exec, 0);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
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_listextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, int attrnamespace)
|
|
{
|
|
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_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, int 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_privileged(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_ops mac_biba_ops =
|
|
{
|
|
.mpo_init = mac_biba_init,
|
|
.mpo_init_bpfdesc_label = mac_biba_init_label,
|
|
.mpo_init_cred_label = mac_biba_init_label,
|
|
.mpo_init_devfsdirent_label = mac_biba_init_label,
|
|
.mpo_init_ifnet_label = mac_biba_init_label,
|
|
.mpo_init_inpcb_label = mac_biba_init_label_waitcheck,
|
|
.mpo_init_ipq_label = mac_biba_init_label_waitcheck,
|
|
.mpo_init_mbuf_label = mac_biba_init_label_waitcheck,
|
|
.mpo_init_mount_label = mac_biba_init_label,
|
|
.mpo_init_mount_fs_label = mac_biba_init_label,
|
|
.mpo_init_pipe_label = mac_biba_init_label,
|
|
.mpo_init_socket_label = mac_biba_init_label_waitcheck,
|
|
.mpo_init_socket_peer_label = mac_biba_init_label_waitcheck,
|
|
.mpo_init_vnode_label = mac_biba_init_label,
|
|
.mpo_destroy_bpfdesc_label = mac_biba_destroy_label,
|
|
.mpo_destroy_cred_label = mac_biba_destroy_label,
|
|
.mpo_destroy_devfsdirent_label = mac_biba_destroy_label,
|
|
.mpo_destroy_ifnet_label = mac_biba_destroy_label,
|
|
.mpo_destroy_inpcb_label = mac_biba_destroy_label,
|
|
.mpo_destroy_ipq_label = mac_biba_destroy_label,
|
|
.mpo_destroy_mbuf_label = mac_biba_destroy_label,
|
|
.mpo_destroy_mount_label = mac_biba_destroy_label,
|
|
.mpo_destroy_mount_fs_label = mac_biba_destroy_label,
|
|
.mpo_destroy_pipe_label = mac_biba_destroy_label,
|
|
.mpo_destroy_socket_label = mac_biba_destroy_label,
|
|
.mpo_destroy_socket_peer_label = mac_biba_destroy_label,
|
|
.mpo_destroy_vnode_label = mac_biba_destroy_label,
|
|
.mpo_copy_cred_label = mac_biba_copy_label,
|
|
.mpo_copy_mbuf_label = mac_biba_copy_label,
|
|
.mpo_copy_pipe_label = mac_biba_copy_label,
|
|
.mpo_copy_socket_label = mac_biba_copy_label,
|
|
.mpo_copy_vnode_label = mac_biba_copy_label,
|
|
.mpo_externalize_cred_label = mac_biba_externalize_label,
|
|
.mpo_externalize_ifnet_label = mac_biba_externalize_label,
|
|
.mpo_externalize_pipe_label = mac_biba_externalize_label,
|
|
.mpo_externalize_socket_label = mac_biba_externalize_label,
|
|
.mpo_externalize_socket_peer_label = mac_biba_externalize_label,
|
|
.mpo_externalize_vnode_label = mac_biba_externalize_label,
|
|
.mpo_internalize_cred_label = mac_biba_internalize_label,
|
|
.mpo_internalize_ifnet_label = mac_biba_internalize_label,
|
|
.mpo_internalize_pipe_label = mac_biba_internalize_label,
|
|
.mpo_internalize_socket_label = mac_biba_internalize_label,
|
|
.mpo_internalize_vnode_label = mac_biba_internalize_label,
|
|
.mpo_create_devfs_device = mac_biba_create_devfs_device,
|
|
.mpo_create_devfs_directory = mac_biba_create_devfs_directory,
|
|
.mpo_create_devfs_symlink = mac_biba_create_devfs_symlink,
|
|
.mpo_create_mount = mac_biba_create_mount,
|
|
.mpo_create_root_mount = mac_biba_create_root_mount,
|
|
.mpo_relabel_vnode = mac_biba_relabel_vnode,
|
|
.mpo_update_devfsdirent = mac_biba_update_devfsdirent,
|
|
.mpo_associate_vnode_devfs = mac_biba_associate_vnode_devfs,
|
|
.mpo_associate_vnode_extattr = mac_biba_associate_vnode_extattr,
|
|
.mpo_associate_vnode_singlelabel = mac_biba_associate_vnode_singlelabel,
|
|
.mpo_create_vnode_extattr = mac_biba_create_vnode_extattr,
|
|
.mpo_setlabel_vnode_extattr = mac_biba_setlabel_vnode_extattr,
|
|
.mpo_create_mbuf_from_socket = mac_biba_create_mbuf_from_socket,
|
|
.mpo_create_pipe = mac_biba_create_pipe,
|
|
.mpo_create_socket = mac_biba_create_socket,
|
|
.mpo_create_socket_from_socket = mac_biba_create_socket_from_socket,
|
|
.mpo_relabel_pipe = mac_biba_relabel_pipe,
|
|
.mpo_relabel_socket = mac_biba_relabel_socket,
|
|
.mpo_set_socket_peer_from_mbuf = mac_biba_set_socket_peer_from_mbuf,
|
|
.mpo_set_socket_peer_from_socket = mac_biba_set_socket_peer_from_socket,
|
|
.mpo_create_bpfdesc = mac_biba_create_bpfdesc,
|
|
.mpo_create_datagram_from_ipq = mac_biba_create_datagram_from_ipq,
|
|
.mpo_create_fragment = mac_biba_create_fragment,
|
|
.mpo_create_ifnet = mac_biba_create_ifnet,
|
|
.mpo_create_inpcb_from_socket = mac_biba_create_inpcb_from_socket,
|
|
.mpo_create_ipq = mac_biba_create_ipq,
|
|
.mpo_create_mbuf_from_inpcb = mac_biba_create_mbuf_from_inpcb,
|
|
.mpo_create_mbuf_from_mbuf = mac_biba_create_mbuf_from_mbuf,
|
|
.mpo_create_mbuf_linklayer = mac_biba_create_mbuf_linklayer,
|
|
.mpo_create_mbuf_from_bpfdesc = mac_biba_create_mbuf_from_bpfdesc,
|
|
.mpo_create_mbuf_from_ifnet = mac_biba_create_mbuf_from_ifnet,
|
|
.mpo_create_mbuf_multicast_encap = mac_biba_create_mbuf_multicast_encap,
|
|
.mpo_create_mbuf_netlayer = mac_biba_create_mbuf_netlayer,
|
|
.mpo_fragment_match = mac_biba_fragment_match,
|
|
.mpo_relabel_ifnet = mac_biba_relabel_ifnet,
|
|
.mpo_update_ipq = mac_biba_update_ipq,
|
|
.mpo_inpcb_sosetlabel = mac_biba_inpcb_sosetlabel,
|
|
.mpo_create_proc0 = mac_biba_create_proc0,
|
|
.mpo_create_proc1 = mac_biba_create_proc1,
|
|
.mpo_relabel_cred = mac_biba_relabel_cred,
|
|
.mpo_check_bpfdesc_receive = mac_biba_check_bpfdesc_receive,
|
|
.mpo_check_cred_relabel = mac_biba_check_cred_relabel,
|
|
.mpo_check_cred_visible = mac_biba_check_cred_visible,
|
|
.mpo_check_ifnet_relabel = mac_biba_check_ifnet_relabel,
|
|
.mpo_check_ifnet_transmit = mac_biba_check_ifnet_transmit,
|
|
.mpo_check_inpcb_deliver = mac_biba_check_inpcb_deliver,
|
|
.mpo_check_kld_load = mac_biba_check_kld_load,
|
|
.mpo_check_kld_unload = mac_biba_check_kld_unload,
|
|
.mpo_check_mount_stat = mac_biba_check_mount_stat,
|
|
.mpo_check_pipe_ioctl = mac_biba_check_pipe_ioctl,
|
|
.mpo_check_pipe_poll = mac_biba_check_pipe_poll,
|
|
.mpo_check_pipe_read = mac_biba_check_pipe_read,
|
|
.mpo_check_pipe_relabel = mac_biba_check_pipe_relabel,
|
|
.mpo_check_pipe_stat = mac_biba_check_pipe_stat,
|
|
.mpo_check_pipe_write = mac_biba_check_pipe_write,
|
|
.mpo_check_proc_debug = mac_biba_check_proc_debug,
|
|
.mpo_check_proc_sched = mac_biba_check_proc_sched,
|
|
.mpo_check_proc_signal = mac_biba_check_proc_signal,
|
|
.mpo_check_socket_deliver = mac_biba_check_socket_deliver,
|
|
.mpo_check_socket_relabel = mac_biba_check_socket_relabel,
|
|
.mpo_check_socket_visible = mac_biba_check_socket_visible,
|
|
.mpo_check_sysarch_ioperm = mac_biba_check_sysarch_ioperm,
|
|
.mpo_check_system_acct = mac_biba_check_system_acct,
|
|
.mpo_check_system_settime = mac_biba_check_system_settime,
|
|
.mpo_check_system_swapon = mac_biba_check_system_swapon,
|
|
.mpo_check_system_swapoff = mac_biba_check_system_swapoff,
|
|
.mpo_check_system_sysctl = mac_biba_check_system_sysctl,
|
|
.mpo_check_vnode_access = mac_biba_check_vnode_open,
|
|
.mpo_check_vnode_chdir = mac_biba_check_vnode_chdir,
|
|
.mpo_check_vnode_chroot = mac_biba_check_vnode_chroot,
|
|
.mpo_check_vnode_create = mac_biba_check_vnode_create,
|
|
.mpo_check_vnode_delete = mac_biba_check_vnode_delete,
|
|
.mpo_check_vnode_deleteacl = mac_biba_check_vnode_deleteacl,
|
|
.mpo_check_vnode_deleteextattr = mac_biba_check_vnode_deleteextattr,
|
|
.mpo_check_vnode_exec = mac_biba_check_vnode_exec,
|
|
.mpo_check_vnode_getacl = mac_biba_check_vnode_getacl,
|
|
.mpo_check_vnode_getextattr = mac_biba_check_vnode_getextattr,
|
|
.mpo_check_vnode_link = mac_biba_check_vnode_link,
|
|
.mpo_check_vnode_listextattr = mac_biba_check_vnode_listextattr,
|
|
.mpo_check_vnode_lookup = mac_biba_check_vnode_lookup,
|
|
.mpo_check_vnode_mmap = mac_biba_check_vnode_mmap,
|
|
.mpo_check_vnode_mprotect = mac_biba_check_vnode_mmap,
|
|
.mpo_check_vnode_open = mac_biba_check_vnode_open,
|
|
.mpo_check_vnode_poll = mac_biba_check_vnode_poll,
|
|
.mpo_check_vnode_read = mac_biba_check_vnode_read,
|
|
.mpo_check_vnode_readdir = mac_biba_check_vnode_readdir,
|
|
.mpo_check_vnode_readlink = mac_biba_check_vnode_readlink,
|
|
.mpo_check_vnode_relabel = mac_biba_check_vnode_relabel,
|
|
.mpo_check_vnode_rename_from = mac_biba_check_vnode_rename_from,
|
|
.mpo_check_vnode_rename_to = mac_biba_check_vnode_rename_to,
|
|
.mpo_check_vnode_revoke = mac_biba_check_vnode_revoke,
|
|
.mpo_check_vnode_setacl = mac_biba_check_vnode_setacl,
|
|
.mpo_check_vnode_setextattr = mac_biba_check_vnode_setextattr,
|
|
.mpo_check_vnode_setflags = mac_biba_check_vnode_setflags,
|
|
.mpo_check_vnode_setmode = mac_biba_check_vnode_setmode,
|
|
.mpo_check_vnode_setowner = mac_biba_check_vnode_setowner,
|
|
.mpo_check_vnode_setutimes = mac_biba_check_vnode_setutimes,
|
|
.mpo_check_vnode_stat = mac_biba_check_vnode_stat,
|
|
.mpo_check_vnode_write = mac_biba_check_vnode_write,
|
|
};
|
|
|
|
MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
|
|
MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, &mac_biba_slot);
|