36cf29fd8d
copy elements of one Biba or MLS label to another based on the flags
on the source label element. Use this instead of
mac_{biba,mls}_{single,range}() to simplify the existing code, as
well as support partial label updates (we don't update if none is
requested).
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
2328 lines
52 KiB
C
2328 lines
52 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
|
|
* 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
|
|
* 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
|
|
* 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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* MLS fixed label mandatory confidentiality policy.
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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/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/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>
|
|
#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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|
|
|
#include <vm/vm.h>
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|
|
|
#include <sys/mac_policy.h>
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|
|
|
#include <security/mac_mls/mac_mls.h>
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|
|
|
SYSCTL_DECL(_security_mac);
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|
|
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SYSCTL_NODE(_security_mac, OID_AUTO, mls, CTLFLAG_RW, 0,
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"TrustedBSD mac_mls policy controls");
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|
|
|
static int mac_mls_enabled = 0;
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|
SYSCTL_INT(_security_mac_mls, OID_AUTO, enabled, CTLFLAG_RW,
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&mac_mls_enabled, 0, "Enforce MAC/MLS policy");
|
|
TUNABLE_INT("security.mac.mls.enabled", &mac_mls_enabled);
|
|
|
|
static int destroyed_not_inited;
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|
SYSCTL_INT(_security_mac_mls, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
|
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&destroyed_not_inited, 0, "Count of labels destroyed but not inited");
|
|
|
|
static int ptys_equal = 0;
|
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SYSCTL_INT(_security_mac_mls, OID_AUTO, ptys_equal, CTLFLAG_RW,
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&ptys_equal, 0, "Label pty devices as mls/equal on create");
|
|
TUNABLE_INT("security.mac.mls.ptys_equal", &ptys_equal);
|
|
|
|
static int revocation_enabled = 0;
|
|
SYSCTL_INT(_security_mac_mls, 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.mls.revocation_enabled", &revocation_enabled);
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|
|
|
static int max_compartments = MAC_MLS_MAX_COMPARTMENTS;
|
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SYSCTL_INT(_security_mac_mls, OID_AUTO, max_compartments, CTLFLAG_RD,
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&max_compartments, 0, "Maximum compartments the policy supports");
|
|
|
|
static int mac_mls_slot;
|
|
#define SLOT(l) ((struct mac_mls *)LABEL_TO_SLOT((l), mac_mls_slot).l_ptr)
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|
|
|
MALLOC_DEFINE(M_MACMLS, "mls label", "MAC/MLS labels");
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|
|
|
static __inline int
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mls_bit_set_empty(u_char *set) {
|
|
int i;
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|
|
|
for (i = 0; i < MAC_MLS_MAX_COMPARTMENTS >> 3; i++)
|
|
if (set[i] != 0)
|
|
return (0);
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|
return (1);
|
|
}
|
|
|
|
static struct mac_mls *
|
|
mls_alloc(int flag)
|
|
{
|
|
struct mac_mls *mac_mls;
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|
|
|
mac_mls = malloc(sizeof(struct mac_mls), M_MACMLS, M_ZERO | flag);
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|
|
|
return (mac_mls);
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|
}
|
|
|
|
static void
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|
mls_free(struct mac_mls *mac_mls)
|
|
{
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|
|
|
if (mac_mls != NULL)
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free(mac_mls, M_MACMLS);
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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
|
|
mls_atmostflags(struct mac_mls *mac_mls, int flags)
|
|
{
|
|
|
|
if ((mac_mls->mm_flags & flags) != mac_mls->mm_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_mls_dominate_element(struct mac_mls_element *a,
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|
struct mac_mls_element *b)
|
|
{
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int bit;
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|
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switch(a->mme_type) {
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case MAC_MLS_TYPE_EQUAL:
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case MAC_MLS_TYPE_HIGH:
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|
return (1);
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|
|
|
case MAC_MLS_TYPE_LOW:
|
|
switch (b->mme_type) {
|
|
case MAC_MLS_TYPE_LEVEL:
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|
case MAC_MLS_TYPE_HIGH:
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|
return (0);
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|
|
|
case MAC_MLS_TYPE_EQUAL:
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case MAC_MLS_TYPE_LOW:
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return (1);
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|
|
|
default:
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|
panic("mac_mls_dominate_element: b->mme_type invalid");
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}
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case MAC_MLS_TYPE_LEVEL:
|
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switch (b->mme_type) {
|
|
case MAC_MLS_TYPE_EQUAL:
|
|
case MAC_MLS_TYPE_LOW:
|
|
return (1);
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|
|
|
case MAC_MLS_TYPE_HIGH:
|
|
return (0);
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|
|
|
case MAC_MLS_TYPE_LEVEL:
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for (bit = 1; bit <= MAC_MLS_MAX_COMPARTMENTS; bit++)
|
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if (!MAC_MLS_BIT_TEST(bit,
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|
a->mme_compartments) &&
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|
MAC_MLS_BIT_TEST(bit, b->mme_compartments))
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return (0);
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return (a->mme_level >= b->mme_level);
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|
|
|
default:
|
|
panic("mac_mls_dominate_element: b->mme_type invalid");
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|
}
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|
|
|
default:
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|
panic("mac_mls_dominate_element: a->mme_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_mls_range_in_range(struct mac_mls *rangea, struct mac_mls *rangeb)
|
|
{
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|
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|
return (mac_mls_dominate_element(&rangeb->mm_rangehigh,
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&rangea->mm_rangehigh) &&
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mac_mls_dominate_element(&rangea->mm_rangelow,
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|
&rangeb->mm_rangelow));
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|
}
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|
|
|
static int
|
|
mac_mls_single_in_range(struct mac_mls *single, struct mac_mls *range)
|
|
{
|
|
|
|
KASSERT((single->mm_flags & MAC_MLS_FLAG_SINGLE) != 0,
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|
("mac_mls_single_in_range: a not single"));
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|
KASSERT((range->mm_flags & MAC_MLS_FLAG_RANGE) != 0,
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|
("mac_mls_single_in_range: b not range"));
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return (mac_mls_dominate_element(&range->mm_rangehigh,
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&single->mm_single) &&
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|
mac_mls_dominate_element(&single->mm_single,
|
|
&range->mm_rangelow));
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|
|
|
return (1);
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|
}
|
|
|
|
static int
|
|
mac_mls_dominate_single(struct mac_mls *a, struct mac_mls *b)
|
|
{
|
|
KASSERT((a->mm_flags & MAC_MLS_FLAG_SINGLE) != 0,
|
|
("mac_mls_dominate_single: a not single"));
|
|
KASSERT((b->mm_flags & MAC_MLS_FLAG_SINGLE) != 0,
|
|
("mac_mls_dominate_single: b not single"));
|
|
|
|
return (mac_mls_dominate_element(&a->mm_single, &b->mm_single));
|
|
}
|
|
|
|
static int
|
|
mac_mls_equal_element(struct mac_mls_element *a, struct mac_mls_element *b)
|
|
{
|
|
|
|
if (a->mme_type == MAC_MLS_TYPE_EQUAL ||
|
|
b->mme_type == MAC_MLS_TYPE_EQUAL)
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|
return (1);
|
|
|
|
return (a->mme_type == b->mme_type && a->mme_level == b->mme_level);
|
|
}
|
|
|
|
static int
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|
mac_mls_equal_single(struct mac_mls *a, struct mac_mls *b)
|
|
{
|
|
|
|
KASSERT((a->mm_flags & MAC_MLS_FLAG_SINGLE) != 0,
|
|
("mac_mls_equal_single: a not single"));
|
|
KASSERT((b->mm_flags & MAC_MLS_FLAG_SINGLE) != 0,
|
|
("mac_mls_equal_single: b not single"));
|
|
|
|
return (mac_mls_equal_element(&a->mm_single, &b->mm_single));
|
|
}
|
|
|
|
static int
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|
mac_mls_contains_equal(struct mac_mls *mac_mls)
|
|
{
|
|
|
|
if (mac_mls->mm_flags & MAC_MLS_FLAG_SINGLE)
|
|
if (mac_mls->mm_single.mme_type == MAC_MLS_TYPE_EQUAL)
|
|
return (1);
|
|
|
|
if (mac_mls->mm_flags & MAC_MLS_FLAG_RANGE) {
|
|
if (mac_mls->mm_rangelow.mme_type == MAC_MLS_TYPE_EQUAL)
|
|
return (1);
|
|
if (mac_mls->mm_rangehigh.mme_type == MAC_MLS_TYPE_EQUAL)
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_subject_equal_ok(struct mac_mls *mac_mls)
|
|
{
|
|
|
|
KASSERT((mac_mls->mm_flags & MAC_MLS_FLAGS_BOTH) == MAC_MLS_FLAGS_BOTH,
|
|
("mac_mls_subject_equal_ok: subject doesn't have both labels"));
|
|
|
|
/* If the single is EQUAL, it's ok. */
|
|
if (mac_mls->mm_single.mme_type == MAC_MLS_TYPE_EQUAL)
|
|
return (0);
|
|
|
|
/* If either range endpoint is EQUAL, it's ok. */
|
|
if (mac_mls->mm_rangelow.mme_type == MAC_MLS_TYPE_EQUAL ||
|
|
mac_mls->mm_rangehigh.mme_type == MAC_MLS_TYPE_EQUAL)
|
|
return (0);
|
|
|
|
/* If the range is low-high, it's ok. */
|
|
if (mac_mls->mm_rangelow.mme_type == MAC_MLS_TYPE_LOW &&
|
|
mac_mls->mm_rangehigh.mme_type == MAC_MLS_TYPE_HIGH)
|
|
return (0);
|
|
|
|
/* It's not ok. */
|
|
return (EPERM);
|
|
}
|
|
|
|
static int
|
|
mac_mls_valid(struct mac_mls *mac_mls)
|
|
{
|
|
|
|
if (mac_mls->mm_flags & MAC_MLS_FLAG_SINGLE) {
|
|
switch (mac_mls->mm_single.mme_type) {
|
|
case MAC_MLS_TYPE_LEVEL:
|
|
break;
|
|
|
|
case MAC_MLS_TYPE_EQUAL:
|
|
case MAC_MLS_TYPE_HIGH:
|
|
case MAC_MLS_TYPE_LOW:
|
|
if (mac_mls->mm_single.mme_level != 0 ||
|
|
!MAC_MLS_BIT_SET_EMPTY(
|
|
mac_mls->mm_single.mme_compartments))
|
|
return (EINVAL);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
} else {
|
|
if (mac_mls->mm_single.mme_type != MAC_MLS_TYPE_UNDEF)
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (mac_mls->mm_flags & MAC_MLS_FLAG_RANGE) {
|
|
switch (mac_mls->mm_rangelow.mme_type) {
|
|
case MAC_MLS_TYPE_LEVEL:
|
|
break;
|
|
|
|
case MAC_MLS_TYPE_EQUAL:
|
|
case MAC_MLS_TYPE_HIGH:
|
|
case MAC_MLS_TYPE_LOW:
|
|
if (mac_mls->mm_rangelow.mme_level != 0 ||
|
|
!MAC_MLS_BIT_SET_EMPTY(
|
|
mac_mls->mm_rangelow.mme_compartments))
|
|
return (EINVAL);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
switch (mac_mls->mm_rangehigh.mme_type) {
|
|
case MAC_MLS_TYPE_LEVEL:
|
|
break;
|
|
|
|
case MAC_MLS_TYPE_EQUAL:
|
|
case MAC_MLS_TYPE_HIGH:
|
|
case MAC_MLS_TYPE_LOW:
|
|
if (mac_mls->mm_rangehigh.mme_level != 0 ||
|
|
!MAC_MLS_BIT_SET_EMPTY(
|
|
mac_mls->mm_rangehigh.mme_compartments))
|
|
return (EINVAL);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
if (!mac_mls_dominate_element(&mac_mls->mm_rangehigh,
|
|
&mac_mls->mm_rangelow))
|
|
return (EINVAL);
|
|
} else {
|
|
if (mac_mls->mm_rangelow.mme_type != MAC_MLS_TYPE_UNDEF ||
|
|
mac_mls->mm_rangehigh.mme_type != MAC_MLS_TYPE_UNDEF)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_mls_set_range(struct mac_mls *mac_mls, u_short typelow,
|
|
u_short levellow, u_char *compartmentslow, u_short typehigh,
|
|
u_short levelhigh, u_char *compartmentshigh)
|
|
{
|
|
|
|
mac_mls->mm_rangelow.mme_type = typelow;
|
|
mac_mls->mm_rangelow.mme_level = levellow;
|
|
if (compartmentslow != NULL)
|
|
memcpy(mac_mls->mm_rangelow.mme_compartments,
|
|
compartmentslow,
|
|
sizeof(mac_mls->mm_rangelow.mme_compartments));
|
|
mac_mls->mm_rangehigh.mme_type = typehigh;
|
|
mac_mls->mm_rangehigh.mme_level = levelhigh;
|
|
if (compartmentshigh != NULL)
|
|
memcpy(mac_mls->mm_rangehigh.mme_compartments,
|
|
compartmentshigh,
|
|
sizeof(mac_mls->mm_rangehigh.mme_compartments));
|
|
mac_mls->mm_flags |= MAC_MLS_FLAG_RANGE;
|
|
}
|
|
|
|
static void
|
|
mac_mls_set_single(struct mac_mls *mac_mls, u_short type, u_short level,
|
|
u_char *compartments)
|
|
{
|
|
|
|
mac_mls->mm_single.mme_type = type;
|
|
mac_mls->mm_single.mme_level = level;
|
|
if (compartments != NULL)
|
|
memcpy(mac_mls->mm_single.mme_compartments, compartments,
|
|
sizeof(mac_mls->mm_single.mme_compartments));
|
|
mac_mls->mm_flags |= MAC_MLS_FLAG_SINGLE;
|
|
}
|
|
|
|
static void
|
|
mac_mls_copy_range(struct mac_mls *labelfrom, struct mac_mls *labelto)
|
|
{
|
|
|
|
KASSERT((labelfrom->mm_flags & MAC_MLS_FLAG_RANGE) != 0,
|
|
("mac_mls_copy_range: labelfrom not range"));
|
|
|
|
labelto->mm_rangelow = labelfrom->mm_rangelow;
|
|
labelto->mm_rangehigh = labelfrom->mm_rangehigh;
|
|
labelto->mm_flags |= MAC_MLS_FLAG_RANGE;
|
|
}
|
|
|
|
static void
|
|
mac_mls_copy_single(struct mac_mls *labelfrom, struct mac_mls *labelto)
|
|
{
|
|
|
|
KASSERT((labelfrom->mm_flags & MAC_MLS_FLAG_SINGLE) != 0,
|
|
("mac_mls_copy_single: labelfrom not single"));
|
|
|
|
labelto->mm_single = labelfrom->mm_single;
|
|
labelto->mm_flags |= MAC_MLS_FLAG_SINGLE;
|
|
}
|
|
|
|
static void
|
|
mac_mls_copy(struct mac_mls *source, struct mac_mls *dest)
|
|
{
|
|
|
|
if (source->mm_flags & MAC_MLS_FLAG_SINGLE)
|
|
mac_mls_copy_single(source, dest);
|
|
if (source->mm_flags & MAC_MLS_FLAG_RANGE)
|
|
mac_mls_copy_range(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Policy module operations.
|
|
*/
|
|
static void
|
|
mac_mls_destroy(struct mac_policy_conf *conf)
|
|
{
|
|
|
|
}
|
|
|
|
static void
|
|
mac_mls_init(struct mac_policy_conf *conf)
|
|
{
|
|
|
|
}
|
|
|
|
/*
|
|
* Label operations.
|
|
*/
|
|
static void
|
|
mac_mls_init_label(struct label *label)
|
|
{
|
|
|
|
SLOT(label) = mls_alloc(M_WAITOK);
|
|
}
|
|
|
|
static int
|
|
mac_mls_init_label_waitcheck(struct label *label, int flag)
|
|
{
|
|
|
|
SLOT(label) = mls_alloc(flag);
|
|
if (SLOT(label) == NULL)
|
|
return (ENOMEM);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_mls_destroy_label(struct label *label)
|
|
{
|
|
|
|
mls_free(SLOT(label));
|
|
SLOT(label) = NULL;
|
|
}
|
|
|
|
static int
|
|
mac_mls_externalize(struct label *label, struct mac *extmac)
|
|
{
|
|
struct mac_mls *mac_mls;
|
|
|
|
mac_mls = SLOT(label);
|
|
|
|
if (mac_mls == NULL) {
|
|
printf("mac_mls_externalize: NULL pointer\n");
|
|
return (0);
|
|
}
|
|
|
|
extmac->m_mls = *mac_mls;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_internalize(struct label *label, struct mac *extmac)
|
|
{
|
|
struct mac_mls *mac_mls;
|
|
int error;
|
|
|
|
mac_mls = SLOT(label);
|
|
|
|
error = mac_mls_valid(mac_mls);
|
|
if (error)
|
|
return (error);
|
|
|
|
*mac_mls = extmac->m_mls;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: file system objects, and things that look
|
|
* a lot like file system objects.
|
|
*/
|
|
static void
|
|
mac_mls_create_devfs_device(dev_t dev, struct devfs_dirent *devfs_dirent,
|
|
struct label *label)
|
|
{
|
|
struct mac_mls *mac_mls;
|
|
int mls_type;
|
|
|
|
mac_mls = 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)
|
|
mls_type = MAC_MLS_TYPE_EQUAL;
|
|
else if (strcmp(dev->si_name, "kmem") == 0 ||
|
|
strcmp(dev->si_name, "mem") == 0)
|
|
mls_type = MAC_MLS_TYPE_HIGH;
|
|
else if (ptys_equal &&
|
|
(strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
|
|
strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
|
|
mls_type = MAC_MLS_TYPE_EQUAL;
|
|
else
|
|
mls_type = MAC_MLS_TYPE_LOW;
|
|
mac_mls_set_single(mac_mls, mls_type, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_devfs_directory(char *dirname, int dirnamelen,
|
|
struct devfs_dirent *devfs_dirent, struct label *label)
|
|
{
|
|
struct mac_mls *mac_mls;
|
|
|
|
mac_mls = SLOT(label);
|
|
mac_mls_set_single(mac_mls, MAC_MLS_TYPE_LOW, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd,
|
|
struct label *ddlabel, struct devfs_dirent *de, struct label *delabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(delabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_devfs_vnode(struct devfs_dirent *devfs_dirent,
|
|
struct label *direntlabel, struct vnode *vp, struct label *vnodelabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(direntlabel);
|
|
dest = SLOT(vnodelabel);
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_vnode(struct ucred *cred, struct vnode *parent,
|
|
struct label *parentlabel, struct vnode *child, struct label *childlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(childlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mount(struct ucred *cred, struct mount *mp,
|
|
struct label *mntlabel, struct label *fslabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(mntlabel);
|
|
mac_mls_copy_single(source, dest);
|
|
dest = SLOT(fslabel);
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_root_mount(struct ucred *cred, struct mount *mp,
|
|
struct label *mntlabel, struct label *fslabel)
|
|
{
|
|
struct mac_mls *mac_mls;
|
|
|
|
/* Always mount root as high integrity. */
|
|
mac_mls = SLOT(fslabel);
|
|
mac_mls_set_single(mac_mls, MAC_MLS_TYPE_LOW, 0, NULL);
|
|
mac_mls = SLOT(mntlabel);
|
|
mac_mls_set_single(mac_mls, MAC_MLS_TYPE_LOW, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_relabel_vnode(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, struct label *label)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(label);
|
|
dest = SLOT(vnodelabel);
|
|
|
|
mac_mls_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_update_devfsdirent(struct devfs_dirent *devfs_dirent,
|
|
struct label *direntlabel, struct vnode *vp, struct label *vnodelabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(vnodelabel);
|
|
dest = SLOT(direntlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_update_procfsvnode(struct vnode *vp, struct label *vnodelabel,
|
|
struct ucred *cred)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(vnodelabel);
|
|
|
|
/*
|
|
* Only copy the single, not the range, since vnodes only have
|
|
* a single.
|
|
*/
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_mls_update_vnode_from_externalized(struct vnode *vp,
|
|
struct label *vnodelabel, struct mac *extmac)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
int error;
|
|
|
|
source = &extmac->m_mls;
|
|
dest = SLOT(vnodelabel);
|
|
|
|
error = mac_mls_valid(source);
|
|
if (error)
|
|
return (error);
|
|
|
|
if ((source->mm_flags & MAC_MLS_FLAGS_BOTH) != MAC_MLS_FLAG_SINGLE)
|
|
return (EINVAL);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_mls_update_vnode_from_mount(struct vnode *vp, struct label *vnodelabel,
|
|
struct mount *mp, struct label *fslabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(fslabel);
|
|
dest = SLOT(vnodelabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: IPC object.
|
|
*/
|
|
static void
|
|
mac_mls_create_mbuf_from_socket(struct socket *so, struct label *socketlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(socketlabel);
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_socket(struct ucred *cred, struct socket *socket,
|
|
struct label *socketlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(socketlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_pipe(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(pipelabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_socket_from_socket(struct socket *oldsocket,
|
|
struct label *oldsocketlabel, struct socket *newsocket,
|
|
struct label *newsocketlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(oldsocketlabel);
|
|
dest = SLOT(newsocketlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_relabel_socket(struct ucred *cred, struct socket *socket,
|
|
struct label *socketlabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(socketlabel);
|
|
|
|
mac_mls_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_relabel_pipe(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(pipelabel);
|
|
|
|
mac_mls_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct label *mbuflabel,
|
|
struct socket *socket, struct label *socketpeerlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(mbuflabel);
|
|
dest = SLOT(socketpeerlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: network objects.
|
|
*/
|
|
static void
|
|
mac_mls_set_socket_peer_from_socket(struct socket *oldsocket,
|
|
struct label *oldsocketlabel, struct socket *newsocket,
|
|
struct label *newsocketpeerlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(oldsocketlabel);
|
|
dest = SLOT(newsocketpeerlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d,
|
|
struct label *bpflabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(bpflabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_ifnet(struct ifnet *ifnet, struct label *ifnetlabel)
|
|
{
|
|
struct mac_mls *dest;
|
|
int level;
|
|
|
|
dest = SLOT(ifnetlabel);
|
|
|
|
if (ifnet->if_type == IFT_LOOP)
|
|
level = MAC_MLS_TYPE_EQUAL;
|
|
else
|
|
level = MAC_MLS_TYPE_LOW;
|
|
|
|
mac_mls_set_single(dest, level, 0, NULL);
|
|
mac_mls_set_range(dest, level, 0, NULL, level, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_ipq(struct mbuf *fragment, struct label *fragmentlabel,
|
|
struct ipq *ipq, struct label *ipqlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(fragmentlabel);
|
|
dest = SLOT(ipqlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_datagram_from_ipq(struct ipq *ipq, struct label *ipqlabel,
|
|
struct mbuf *datagram, struct label *datagramlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(ipqlabel);
|
|
dest = SLOT(datagramlabel);
|
|
|
|
/* Just use the head, since we require them all to match. */
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_fragment(struct mbuf *datagram, struct label *datagramlabel,
|
|
struct mbuf *fragment, struct label *fragmentlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(datagramlabel);
|
|
dest = SLOT(fragmentlabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mbuf_from_mbuf(struct mbuf *oldmbuf,
|
|
struct label *oldmbuflabel, struct mbuf *newmbuf,
|
|
struct label *newmbuflabel)
|
|
{
|
|
struct mac_mls *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->mm_flags & MAC_MLS_FLAG_RANGE) == 0,
|
|
("mac_mls_create_mbuf_from_mbuf: source mbuf has range"));
|
|
mac_mls_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mbuf_linklayer(struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *mbuf, struct label *mbuflabel)
|
|
{
|
|
struct mac_mls *dest;
|
|
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_mls_set_single(dest, MAC_MLS_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct label *bpflabel,
|
|
struct mbuf *mbuf, struct label *mbuflabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(bpflabel);
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mbuf_from_ifnet(struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(ifnetlabel);
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mbuf_multicast_encap(struct mbuf *oldmbuf,
|
|
struct label *oldmbuflabel, struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *newmbuf, struct label *newmbuflabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(oldmbuflabel);
|
|
dest = SLOT(newmbuflabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_mbuf_netlayer(struct mbuf *oldmbuf, struct label *oldmbuflabel,
|
|
struct mbuf *newmbuf, struct label *newmbuflabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(oldmbuflabel);
|
|
dest = SLOT(newmbuflabel);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_mls_fragment_match(struct mbuf *fragment, struct label *fragmentlabel,
|
|
struct ipq *ipq, struct label *ipqlabel)
|
|
{
|
|
struct mac_mls *a, *b;
|
|
|
|
a = SLOT(ipqlabel);
|
|
b = SLOT(fragmentlabel);
|
|
|
|
return (mac_mls_equal_single(a, b));
|
|
}
|
|
|
|
static void
|
|
mac_mls_relabel_ifnet(struct ucred *cred, struct ifnet *ifnet,
|
|
struct label *ifnetlabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(ifnetlabel);
|
|
|
|
mac_mls_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_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_mls_create_cred(struct ucred *cred_parent, struct ucred *cred_child)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&cred_parent->cr_label);
|
|
dest = SLOT(&cred_child->cr_label);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
mac_mls_copy_range(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_mls_execve_transition(struct ucred *old, struct ucred *new,
|
|
struct vnode *vp, struct mac *vnodelabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(&old->cr_label);
|
|
dest = SLOT(&new->cr_label);
|
|
|
|
mac_mls_copy_single(source, dest);
|
|
mac_mls_copy_range(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_mls_execve_will_transition(struct ucred *old, struct vnode *vp,
|
|
struct mac *vnodelabel)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_proc0(struct ucred *cred)
|
|
{
|
|
struct mac_mls *dest;
|
|
|
|
dest = SLOT(&cred->cr_label);
|
|
|
|
mac_mls_set_single(dest, MAC_MLS_TYPE_EQUAL, 0, NULL);
|
|
mac_mls_set_range(dest, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH,
|
|
0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_create_proc1(struct ucred *cred)
|
|
{
|
|
struct mac_mls *dest;
|
|
|
|
dest = SLOT(&cred->cr_label);
|
|
|
|
mac_mls_set_single(dest, MAC_MLS_TYPE_LOW, 0, NULL);
|
|
mac_mls_set_range(dest, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH,
|
|
0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_mls_relabel_cred(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
struct mac_mls *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(&cred->cr_label);
|
|
|
|
mac_mls_copy(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Access control checks.
|
|
*/
|
|
static int
|
|
mac_mls_check_bpfdesc_receive(struct bpf_d *bpf_d, struct label *bpflabel,
|
|
struct ifnet *ifnet, struct label *ifnetlabel)
|
|
{
|
|
struct mac_mls *a, *b;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
a = SLOT(bpflabel);
|
|
b = SLOT(ifnetlabel);
|
|
|
|
if (mac_mls_equal_single(a, b))
|
|
return (0);
|
|
return (EACCES);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_cred_relabel(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
struct mac_mls *subj, *new;
|
|
int error;
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
new = SLOT(newlabel);
|
|
|
|
/*
|
|
* If there is an MLS label update for the credential, it may be
|
|
* an update of single, range, or both.
|
|
*/
|
|
error = mls_atmostflags(new, MAC_MLS_FLAGS_BOTH);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* If the MLS label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAGS_BOTH) {
|
|
/*
|
|
* To change the MLS single label on a credential, the
|
|
* new single label must be in the current range.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAG_SINGLE &&
|
|
!mac_mls_single_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the MLS range label on a credential, the
|
|
* new range label must be in the current range.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAG_RANGE &&
|
|
!mac_mls_range_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To have EQUAL in any component of the new credential
|
|
* MLS label, the subject must already have EQUAL in
|
|
* their label.
|
|
*/
|
|
if (mac_mls_contains_equal(new)) {
|
|
error = mac_mls_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_mls_check_cred_visible(struct ucred *u1, struct ucred *u2)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&u1->cr_label);
|
|
obj = SLOT(&u2->cr_label);
|
|
|
|
/* XXX: range */
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (ESRCH);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_ifnet_relabel(struct ucred *cred, struct ifnet *ifnet,
|
|
struct label *ifnetlabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *subj, *new;
|
|
int error;
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
new = SLOT(newlabel);
|
|
|
|
/*
|
|
* If there is an MLS label update for the interface, it may
|
|
* be an update of single, range, or both.
|
|
*/
|
|
error = mls_atmostflags(new, MAC_MLS_FLAGS_BOTH);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* If the MLS label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAGS_BOTH) {
|
|
/*
|
|
* Rely on traditional superuser status for the MLS
|
|
* interface relabel requirements. XXX: 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_mls_check_ifnet_transmit(struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_mls *p, *i;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mbuflabel);
|
|
i = SLOT(ifnetlabel);
|
|
|
|
return (mac_mls_single_in_range(p, i) ? 0 : EACCES);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_mount_stat(struct ucred *cred, struct mount *mp,
|
|
struct label *mntlabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(mntlabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel, unsigned long cmd, void /* caddr_t */ *data)
|
|
{
|
|
|
|
if(!mac_mls_enabled)
|
|
return (0);
|
|
|
|
/* XXX: This will be implemented soon... */
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_pipe_poll(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT((pipelabel));
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_pipe_read(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT((pipelabel));
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_pipe_relabel(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *subj, *obj, *new;
|
|
int error;
|
|
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(pipelabel);
|
|
|
|
/*
|
|
* If there is an MLS label update for a pipe, it must be a
|
|
* single update.
|
|
*/
|
|
error = mls_atmostflags(new, MAC_MLS_FLAG_SINGLE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To perform a relabel of a pipe (MLS label or not), MLS must
|
|
* authorize the relabel.
|
|
*/
|
|
if (!mac_mls_single_in_range(obj, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the MLS label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAG_SINGLE) {
|
|
/*
|
|
* To change the MLS label on a pipe, the new pipe label
|
|
* must be in the subject range.
|
|
*/
|
|
if (!mac_mls_single_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the MLS label on a pipe to be EQUAL, the
|
|
* subject must have appropriate privilege.
|
|
*/
|
|
if (mac_mls_contains_equal(new)) {
|
|
error = mac_mls_subject_equal_ok(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_pipe_stat(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT((pipelabel));
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_pipe_write(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT((pipelabel));
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_proc_debug(struct ucred *cred, struct proc *proc)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(&proc->p_ucred->cr_label);
|
|
|
|
/* XXX: range checks */
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (ESRCH);
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_proc_sched(struct ucred *cred, struct proc *proc)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(&proc->p_ucred->cr_label);
|
|
|
|
/* XXX: range checks */
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (ESRCH);
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_proc_signal(struct ucred *cred, struct proc *proc, int signum)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(&proc->p_ucred->cr_label);
|
|
|
|
/* XXX: range checks */
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (ESRCH);
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_socket_deliver(struct socket *so, struct label *socketlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_mls *p, *s;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mbuflabel);
|
|
s = SLOT(socketlabel);
|
|
|
|
return (mac_mls_equal_single(p, s) ? 0 : EACCES);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_socket_relabel(struct ucred *cred, struct socket *socket,
|
|
struct label *socketlabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *subj, *obj, *new;
|
|
int error;
|
|
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(socketlabel);
|
|
|
|
/*
|
|
* If there is an MLS label update for the socket, it may be
|
|
* an update of single.
|
|
*/
|
|
error = mls_atmostflags(new, MAC_MLS_FLAG_SINGLE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To relabel a socket, the old socket single must be in the subject
|
|
* range.
|
|
*/
|
|
if (!mac_mls_single_in_range(obj, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the MLS label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAG_SINGLE) {
|
|
/*
|
|
* To relabel a socket, the new socket single must be in
|
|
* the subject range.
|
|
*/
|
|
if (!mac_mls_single_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the MLS label on the socket to contain EQUAL,
|
|
* the subject must have appropriate privilege.
|
|
*/
|
|
if (mac_mls_contains_equal(new)) {
|
|
error = mac_mls_subject_equal_ok(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_socket_visible(struct ucred *cred, struct socket *socket,
|
|
struct label *socketlabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(socketlabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (ENOENT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_chdir(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_chroot(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_create(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct componentname *cnp, struct vattr *vap)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_delete(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct vnode *vp, struct label *label,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, acl_type_t type)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_exec(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_getacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, acl_type_t type)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, int attrnamespace, const char *name, struct uio *uio)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_link(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct vnode *vp, struct label *label,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(dlabel);
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct componentname *cnp)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, int prot)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
/*
|
|
* Rely on the use of open()-time protections to handle
|
|
* non-revocation cases.
|
|
*/
|
|
if (!mac_mls_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
if (prot & VM_PROT_WRITE) {
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_open(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, mode_t acc_mode)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
/* XXX privilege override for admin? */
|
|
if (acc_mode & (VREAD | VEXEC | VSTAT)) {
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
if (acc_mode & (VWRITE | VAPPEND | VADMIN)) {
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_poll(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *label)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&active_cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *label)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&active_cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_readdir(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_readlink(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_relabel(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, struct label *newlabel)
|
|
{
|
|
struct mac_mls *old, *new, *subj;
|
|
int error;
|
|
|
|
old = SLOT(vnodelabel);
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(&cred->cr_label);
|
|
|
|
/*
|
|
* If there is an MLS label update for the vnode, it must be a
|
|
* single label.
|
|
*/
|
|
error = mls_atmostflags(new, MAC_MLS_FLAG_SINGLE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To perform a relabel of the vnode (MLS label or not), MLS must
|
|
* authorize the relabel.
|
|
*/
|
|
if (!mac_mls_single_in_range(old, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the MLS label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mm_flags & MAC_MLS_FLAG_SINGLE) {
|
|
/*
|
|
* To change the MLS label on a vnode, the new vnode label
|
|
* must be in the subject range.
|
|
*/
|
|
if (!mac_mls_single_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the MLS label on the vnode to be EQUAL,
|
|
* the subject must have appropriate privilege.
|
|
*/
|
|
if (mac_mls_contains_equal(new)) {
|
|
error = mac_mls_subject_equal_ok(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
static int
|
|
mac_mls_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct vnode *vp, struct label *label,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_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_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
if (vp != NULL) {
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_revoke(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, acl_type_t type, struct acl *acl)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, int attrnamespace, const char *name,
|
|
struct uio *uio)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
/* XXX: protect the MAC EA in a special way? */
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, u_long flags)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, mode_t mode)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, uid_t uid, gid_t gid)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, struct timespec atime, struct timespec mtime)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_stat(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *vnodelabel)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&active_cred->cr_label);
|
|
obj = SLOT(vnodelabel);
|
|
|
|
if (!mac_mls_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_mls_check_vnode_write(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *label)
|
|
{
|
|
struct mac_mls *subj, *obj;
|
|
|
|
if (!mac_mls_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&active_cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_mls_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct mac_policy_op_entry mac_mls_ops[] =
|
|
{
|
|
{ MAC_DESTROY,
|
|
(macop_t)mac_mls_destroy },
|
|
{ MAC_INIT,
|
|
(macop_t)mac_mls_init },
|
|
{ MAC_INIT_BPFDESC_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_CRED_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_DEVFSDIRENT_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_IFNET_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_IPQ_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_MBUF_LABEL,
|
|
(macop_t)mac_mls_init_label_waitcheck },
|
|
{ MAC_INIT_MOUNT_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_MOUNT_FS_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_PIPE_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_SOCKET_LABEL,
|
|
(macop_t)mac_mls_init_label_waitcheck },
|
|
{ MAC_INIT_SOCKET_PEER_LABEL,
|
|
(macop_t)mac_mls_init_label_waitcheck },
|
|
{ MAC_INIT_TEMP_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_INIT_VNODE_LABEL,
|
|
(macop_t)mac_mls_init_label },
|
|
{ MAC_DESTROY_BPFDESC_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_CRED_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_DEVFSDIRENT_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_IFNET_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_IPQ_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_MBUF_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_MOUNT_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_MOUNT_FS_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_PIPE_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_SOCKET_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_SOCKET_PEER_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_TEMP_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_DESTROY_VNODE_LABEL,
|
|
(macop_t)mac_mls_destroy_label },
|
|
{ MAC_EXTERNALIZE,
|
|
(macop_t)mac_mls_externalize },
|
|
{ MAC_INTERNALIZE,
|
|
(macop_t)mac_mls_internalize },
|
|
{ MAC_CREATE_DEVFS_DEVICE,
|
|
(macop_t)mac_mls_create_devfs_device },
|
|
{ MAC_CREATE_DEVFS_DIRECTORY,
|
|
(macop_t)mac_mls_create_devfs_directory },
|
|
{ MAC_CREATE_DEVFS_SYMLINK,
|
|
(macop_t)mac_mls_create_devfs_symlink },
|
|
{ MAC_CREATE_DEVFS_VNODE,
|
|
(macop_t)mac_mls_create_devfs_vnode },
|
|
{ MAC_CREATE_VNODE,
|
|
(macop_t)mac_mls_create_vnode },
|
|
{ MAC_CREATE_MOUNT,
|
|
(macop_t)mac_mls_create_mount },
|
|
{ MAC_CREATE_ROOT_MOUNT,
|
|
(macop_t)mac_mls_create_root_mount },
|
|
{ MAC_RELABEL_VNODE,
|
|
(macop_t)mac_mls_relabel_vnode },
|
|
{ MAC_UPDATE_DEVFSDIRENT,
|
|
(macop_t)mac_mls_update_devfsdirent },
|
|
{ MAC_UPDATE_PROCFSVNODE,
|
|
(macop_t)mac_mls_update_procfsvnode },
|
|
{ MAC_UPDATE_VNODE_FROM_EXTERNALIZED,
|
|
(macop_t)mac_mls_update_vnode_from_externalized },
|
|
{ MAC_UPDATE_VNODE_FROM_MOUNT,
|
|
(macop_t)mac_mls_update_vnode_from_mount },
|
|
{ MAC_CREATE_MBUF_FROM_SOCKET,
|
|
(macop_t)mac_mls_create_mbuf_from_socket },
|
|
{ MAC_CREATE_PIPE,
|
|
(macop_t)mac_mls_create_pipe },
|
|
{ MAC_CREATE_SOCKET,
|
|
(macop_t)mac_mls_create_socket },
|
|
{ MAC_CREATE_SOCKET_FROM_SOCKET,
|
|
(macop_t)mac_mls_create_socket_from_socket },
|
|
{ MAC_RELABEL_PIPE,
|
|
(macop_t)mac_mls_relabel_pipe },
|
|
{ MAC_RELABEL_SOCKET,
|
|
(macop_t)mac_mls_relabel_socket },
|
|
{ MAC_SET_SOCKET_PEER_FROM_MBUF,
|
|
(macop_t)mac_mls_set_socket_peer_from_mbuf },
|
|
{ MAC_SET_SOCKET_PEER_FROM_SOCKET,
|
|
(macop_t)mac_mls_set_socket_peer_from_socket },
|
|
{ MAC_CREATE_BPFDESC,
|
|
(macop_t)mac_mls_create_bpfdesc },
|
|
{ MAC_CREATE_DATAGRAM_FROM_IPQ,
|
|
(macop_t)mac_mls_create_datagram_from_ipq },
|
|
{ MAC_CREATE_FRAGMENT,
|
|
(macop_t)mac_mls_create_fragment },
|
|
{ MAC_CREATE_IFNET,
|
|
(macop_t)mac_mls_create_ifnet },
|
|
{ MAC_CREATE_IPQ,
|
|
(macop_t)mac_mls_create_ipq },
|
|
{ MAC_CREATE_MBUF_FROM_MBUF,
|
|
(macop_t)mac_mls_create_mbuf_from_mbuf },
|
|
{ MAC_CREATE_MBUF_LINKLAYER,
|
|
(macop_t)mac_mls_create_mbuf_linklayer },
|
|
{ MAC_CREATE_MBUF_FROM_BPFDESC,
|
|
(macop_t)mac_mls_create_mbuf_from_bpfdesc },
|
|
{ MAC_CREATE_MBUF_FROM_IFNET,
|
|
(macop_t)mac_mls_create_mbuf_from_ifnet },
|
|
{ MAC_CREATE_MBUF_MULTICAST_ENCAP,
|
|
(macop_t)mac_mls_create_mbuf_multicast_encap },
|
|
{ MAC_CREATE_MBUF_NETLAYER,
|
|
(macop_t)mac_mls_create_mbuf_netlayer },
|
|
{ MAC_FRAGMENT_MATCH,
|
|
(macop_t)mac_mls_fragment_match },
|
|
{ MAC_RELABEL_IFNET,
|
|
(macop_t)mac_mls_relabel_ifnet },
|
|
{ MAC_UPDATE_IPQ,
|
|
(macop_t)mac_mls_update_ipq },
|
|
{ MAC_CREATE_CRED,
|
|
(macop_t)mac_mls_create_cred },
|
|
{ MAC_EXECVE_TRANSITION,
|
|
(macop_t)mac_mls_execve_transition },
|
|
{ MAC_EXECVE_WILL_TRANSITION,
|
|
(macop_t)mac_mls_execve_will_transition },
|
|
{ MAC_CREATE_PROC0,
|
|
(macop_t)mac_mls_create_proc0 },
|
|
{ MAC_CREATE_PROC1,
|
|
(macop_t)mac_mls_create_proc1 },
|
|
{ MAC_RELABEL_CRED,
|
|
(macop_t)mac_mls_relabel_cred },
|
|
{ MAC_CHECK_BPFDESC_RECEIVE,
|
|
(macop_t)mac_mls_check_bpfdesc_receive },
|
|
{ MAC_CHECK_CRED_RELABEL,
|
|
(macop_t)mac_mls_check_cred_relabel },
|
|
{ MAC_CHECK_CRED_VISIBLE,
|
|
(macop_t)mac_mls_check_cred_visible },
|
|
{ MAC_CHECK_IFNET_RELABEL,
|
|
(macop_t)mac_mls_check_ifnet_relabel },
|
|
{ MAC_CHECK_IFNET_TRANSMIT,
|
|
(macop_t)mac_mls_check_ifnet_transmit },
|
|
{ MAC_CHECK_MOUNT_STAT,
|
|
(macop_t)mac_mls_check_mount_stat },
|
|
{ MAC_CHECK_PIPE_IOCTL,
|
|
(macop_t)mac_mls_check_pipe_ioctl },
|
|
{ MAC_CHECK_PIPE_POLL,
|
|
(macop_t)mac_mls_check_pipe_poll },
|
|
{ MAC_CHECK_PIPE_READ,
|
|
(macop_t)mac_mls_check_pipe_read },
|
|
{ MAC_CHECK_PIPE_RELABEL,
|
|
(macop_t)mac_mls_check_pipe_relabel },
|
|
{ MAC_CHECK_PIPE_STAT,
|
|
(macop_t)mac_mls_check_pipe_stat },
|
|
{ MAC_CHECK_PIPE_WRITE,
|
|
(macop_t)mac_mls_check_pipe_write },
|
|
{ MAC_CHECK_PROC_DEBUG,
|
|
(macop_t)mac_mls_check_proc_debug },
|
|
{ MAC_CHECK_PROC_SCHED,
|
|
(macop_t)mac_mls_check_proc_sched },
|
|
{ MAC_CHECK_PROC_SIGNAL,
|
|
(macop_t)mac_mls_check_proc_signal },
|
|
{ MAC_CHECK_SOCKET_DELIVER,
|
|
(macop_t)mac_mls_check_socket_deliver },
|
|
{ MAC_CHECK_SOCKET_RELABEL,
|
|
(macop_t)mac_mls_check_socket_relabel },
|
|
{ MAC_CHECK_SOCKET_VISIBLE,
|
|
(macop_t)mac_mls_check_socket_visible },
|
|
{ MAC_CHECK_VNODE_ACCESS,
|
|
(macop_t)mac_mls_check_vnode_open },
|
|
{ MAC_CHECK_VNODE_CHDIR,
|
|
(macop_t)mac_mls_check_vnode_chdir },
|
|
{ MAC_CHECK_VNODE_CHROOT,
|
|
(macop_t)mac_mls_check_vnode_chroot },
|
|
{ MAC_CHECK_VNODE_CREATE,
|
|
(macop_t)mac_mls_check_vnode_create },
|
|
{ MAC_CHECK_VNODE_DELETE,
|
|
(macop_t)mac_mls_check_vnode_delete },
|
|
{ MAC_CHECK_VNODE_DELETEACL,
|
|
(macop_t)mac_mls_check_vnode_deleteacl },
|
|
{ MAC_CHECK_VNODE_EXEC,
|
|
(macop_t)mac_mls_check_vnode_exec },
|
|
{ MAC_CHECK_VNODE_GETACL,
|
|
(macop_t)mac_mls_check_vnode_getacl },
|
|
{ MAC_CHECK_VNODE_GETEXTATTR,
|
|
(macop_t)mac_mls_check_vnode_getextattr },
|
|
{ MAC_CHECK_VNODE_LINK,
|
|
(macop_t)mac_mls_check_vnode_link },
|
|
{ MAC_CHECK_VNODE_LOOKUP,
|
|
(macop_t)mac_mls_check_vnode_lookup },
|
|
{ MAC_CHECK_VNODE_MMAP,
|
|
(macop_t)mac_mls_check_vnode_mmap },
|
|
{ MAC_CHECK_VNODE_MPROTECT,
|
|
(macop_t)mac_mls_check_vnode_mmap },
|
|
{ MAC_CHECK_VNODE_OPEN,
|
|
(macop_t)mac_mls_check_vnode_open },
|
|
{ MAC_CHECK_VNODE_POLL,
|
|
(macop_t)mac_mls_check_vnode_poll },
|
|
{ MAC_CHECK_VNODE_READ,
|
|
(macop_t)mac_mls_check_vnode_read },
|
|
{ MAC_CHECK_VNODE_READDIR,
|
|
(macop_t)mac_mls_check_vnode_readdir },
|
|
{ MAC_CHECK_VNODE_READLINK,
|
|
(macop_t)mac_mls_check_vnode_readlink },
|
|
{ MAC_CHECK_VNODE_RELABEL,
|
|
(macop_t)mac_mls_check_vnode_relabel },
|
|
{ MAC_CHECK_VNODE_RENAME_FROM,
|
|
(macop_t)mac_mls_check_vnode_rename_from },
|
|
{ MAC_CHECK_VNODE_RENAME_TO,
|
|
(macop_t)mac_mls_check_vnode_rename_to },
|
|
{ MAC_CHECK_VNODE_REVOKE,
|
|
(macop_t)mac_mls_check_vnode_revoke },
|
|
{ MAC_CHECK_VNODE_SETACL,
|
|
(macop_t)mac_mls_check_vnode_setacl },
|
|
{ MAC_CHECK_VNODE_SETEXTATTR,
|
|
(macop_t)mac_mls_check_vnode_setextattr },
|
|
{ MAC_CHECK_VNODE_SETFLAGS,
|
|
(macop_t)mac_mls_check_vnode_setflags },
|
|
{ MAC_CHECK_VNODE_SETMODE,
|
|
(macop_t)mac_mls_check_vnode_setmode },
|
|
{ MAC_CHECK_VNODE_SETOWNER,
|
|
(macop_t)mac_mls_check_vnode_setowner },
|
|
{ MAC_CHECK_VNODE_SETUTIMES,
|
|
(macop_t)mac_mls_check_vnode_setutimes },
|
|
{ MAC_CHECK_VNODE_STAT,
|
|
(macop_t)mac_mls_check_vnode_stat },
|
|
{ MAC_CHECK_VNODE_WRITE,
|
|
(macop_t)mac_mls_check_vnode_write },
|
|
{ MAC_OP_LAST, NULL }
|
|
};
|
|
|
|
MAC_POLICY_SET(mac_mls_ops, trustedbsd_mac_mls, "TrustedBSD MAC/MLS",
|
|
MPC_LOADTIME_FLAG_NOTLATE, &mac_mls_slot);
|