e6faed4db0
function takes an int * parameter, not a size_t * parameter. Arguably, it should rather take a size_t *, but that would require changing the uio_resid field of struct uio to be a size_t instead of an int, which I don't want to do that close to 5.0-RELEASE. Reviewed by: rwatson
2646 lines
62 KiB
C
2646 lines
62 KiB
C
/*-
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* 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.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Developed by the TrustedBSD Project.
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* Biba fixed label mandatory integrity 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/extattr.h>
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#include <sys/kernel.h>
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#include <sys/mac.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/sysent.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/pipe.h>
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#include <sys/sysctl.h>
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#include <fs/devfs/devfs.h>
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#include <net/bpfdesc.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <netinet/in.h>
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#include <netinet/ip_var.h>
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#include <vm/vm.h>
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#include <sys/mac_policy.h>
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#include <security/mac_biba/mac_biba.h>
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SYSCTL_DECL(_security_mac);
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SYSCTL_NODE(_security_mac, OID_AUTO, biba, CTLFLAG_RW, 0,
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"TrustedBSD mac_biba policy controls");
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static int mac_biba_label_size = sizeof(struct mac_biba);
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SYSCTL_INT(_security_mac_biba, OID_AUTO, label_size, CTLFLAG_RD,
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&mac_biba_label_size, 0, "Size of struct mac_biba");
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static int mac_biba_enabled = 0;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RW,
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&mac_biba_enabled, 0, "Enforce MAC/Biba policy");
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TUNABLE_INT("security.mac.biba.enabled", &mac_biba_enabled);
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static int destroyed_not_inited;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
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&destroyed_not_inited, 0, "Count of labels destroyed but not inited");
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static int trust_all_interfaces = 0;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
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&trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/Biba");
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TUNABLE_INT("security.mac.biba.trust_all_interfaces", &trust_all_interfaces);
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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;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RW,
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&revocation_enabled, 0, "Revoke access to objects on relabel");
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TUNABLE_INT("security.mac.biba.revocation_enabled", &revocation_enabled);
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static int mac_biba_slot;
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#define SLOT(l) ((struct mac_biba *)LABEL_TO_SLOT((l), mac_biba_slot).l_ptr)
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MALLOC_DEFINE(M_MACBIBA, "biba label", "MAC/Biba labels");
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static __inline int
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biba_bit_set_empty(u_char *set) {
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int i;
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for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
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if (set[i] != 0)
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return (0);
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return (1);
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}
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static struct mac_biba *
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biba_alloc(int flag)
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{
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struct mac_biba *mac_biba;
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mac_biba = malloc(sizeof(struct mac_biba), M_MACBIBA, M_ZERO | flag);
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return (mac_biba);
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}
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static void
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biba_free(struct mac_biba *mac_biba)
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{
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if (mac_biba != NULL)
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free(mac_biba, M_MACBIBA);
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else
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atomic_add_int(&destroyed_not_inited, 1);
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}
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static int
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biba_atmostflags(struct mac_biba *mac_biba, int flags)
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{
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if ((mac_biba->mb_flags & flags) != mac_biba->mb_flags)
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return (EINVAL);
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return (0);
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}
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static int
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mac_biba_dominate_element(struct mac_biba_element *a,
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struct mac_biba_element *b)
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{
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int bit;
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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:
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case MAC_BIBA_TYPE_LOW:
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return (1);
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default:
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panic("mac_biba_dominate_element: b->mbe_type invalid");
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}
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case MAC_BIBA_TYPE_GRADE:
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switch (b->mbe_type) {
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case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_LOW:
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return (1);
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case MAC_BIBA_TYPE_HIGH:
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return (0);
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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,
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a->mbe_compartments) &&
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MAC_BIBA_BIT_TEST(bit, b->mbe_compartments))
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return (0);
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return (a->mbe_grade >= b->mbe_grade);
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default:
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panic("mac_biba_dominate_element: b->mbe_type invalid");
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}
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default:
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panic("mac_biba_dominate_element: a->mbe_type invalid");
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}
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return (0);
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}
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static int
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mac_biba_subject_dominate_high(struct mac_biba *mac_biba)
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{
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struct mac_biba_element *element;
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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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return (element->mbe_type == MAC_BIBA_TYPE_EQUAL ||
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element->mbe_type == MAC_BIBA_TYPE_HIGH);
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}
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static int
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mac_biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
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{
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return (mac_biba_dominate_element(&rangeb->mb_rangehigh,
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&rangea->mb_rangehigh) &&
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mac_biba_dominate_element(&rangea->mb_rangelow,
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&rangeb->mb_rangelow));
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}
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static int
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mac_biba_single_in_range(struct mac_biba *single, struct mac_biba *range)
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{
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KASSERT((single->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_single_in_range: a not single"));
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KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
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("mac_biba_single_in_range: b not range"));
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return (mac_biba_dominate_element(&range->mb_rangehigh,
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&single->mb_single) &&
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mac_biba_dominate_element(&single->mb_single,
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&range->mb_rangelow));
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return (1);
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}
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static int
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mac_biba_dominate_single(struct mac_biba *a, struct mac_biba *b)
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{
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KASSERT((a->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_dominate_single: a not single"));
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KASSERT((b->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_dominate_single: b not single"));
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return (mac_biba_dominate_element(&a->mb_single, &b->mb_single));
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}
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static int
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mac_biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
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{
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if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
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b->mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
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}
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static int
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mac_biba_equal_single(struct mac_biba *a, struct mac_biba *b)
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{
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KASSERT((a->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_equal_single: a not single"));
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KASSERT((b->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
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("mac_biba_equal_single: b not single"));
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return (mac_biba_equal_element(&a->mb_single, &b->mb_single));
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}
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static int
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mac_biba_contains_equal(struct mac_biba *mac_biba)
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{
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if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE)
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if (mac_biba->mb_single.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
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if (mac_biba->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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if (mac_biba->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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}
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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_subject_privileged(struct mac_biba *mac_biba)
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{
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|
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KASSERT((mac_biba->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
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MAC_BIBA_FLAGS_BOTH,
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("mac_biba_subject_privileged: subject doesn't have both labels"));
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|
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/* If the single is EQUAL, it's ok. */
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if (mac_biba->mb_single.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (0);
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|
|
/* If either range endpoint is EQUAL, it's ok. */
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if (mac_biba->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL ||
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mac_biba->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (0);
|
|
|
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/* If the range is low-high, it's ok. */
|
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if (mac_biba->mb_rangelow.mbe_type == MAC_BIBA_TYPE_LOW &&
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mac_biba->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_HIGH)
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return (0);
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|
|
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/* It's not ok. */
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return (EPERM);
|
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}
|
|
|
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static int
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mac_biba_high_single(struct mac_biba *mac_biba)
|
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{
|
|
|
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KASSERT((mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
|
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("mac_biba_equal_single: mac_biba not single"));
|
|
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return (mac_biba->mb_single.mbe_type == MAC_BIBA_TYPE_HIGH);
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}
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|
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static int
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mac_biba_valid(struct mac_biba *mac_biba)
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{
|
|
|
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if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) {
|
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switch (mac_biba->mb_single.mbe_type) {
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case MAC_BIBA_TYPE_GRADE:
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break;
|
|
|
|
case MAC_BIBA_TYPE_EQUAL:
|
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case MAC_BIBA_TYPE_HIGH:
|
|
case MAC_BIBA_TYPE_LOW:
|
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if (mac_biba->mb_single.mbe_grade != 0 ||
|
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!MAC_BIBA_BIT_SET_EMPTY(
|
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mac_biba->mb_single.mbe_compartments))
|
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return (EINVAL);
|
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break;
|
|
|
|
default:
|
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return (EINVAL);
|
|
}
|
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} else {
|
|
if (mac_biba->mb_single.mbe_type != MAC_BIBA_TYPE_UNDEF)
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
|
|
switch (mac_biba->mb_rangelow.mbe_type) {
|
|
case MAC_BIBA_TYPE_GRADE:
|
|
break;
|
|
|
|
case MAC_BIBA_TYPE_EQUAL:
|
|
case MAC_BIBA_TYPE_HIGH:
|
|
case MAC_BIBA_TYPE_LOW:
|
|
if (mac_biba->mb_rangelow.mbe_grade != 0 ||
|
|
!MAC_BIBA_BIT_SET_EMPTY(
|
|
mac_biba->mb_rangelow.mbe_compartments))
|
|
return (EINVAL);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
switch (mac_biba->mb_rangehigh.mbe_type) {
|
|
case MAC_BIBA_TYPE_GRADE:
|
|
break;
|
|
|
|
case MAC_BIBA_TYPE_EQUAL:
|
|
case MAC_BIBA_TYPE_HIGH:
|
|
case MAC_BIBA_TYPE_LOW:
|
|
if (mac_biba->mb_rangehigh.mbe_grade != 0 ||
|
|
!MAC_BIBA_BIT_SET_EMPTY(
|
|
mac_biba->mb_rangehigh.mbe_compartments))
|
|
return (EINVAL);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
if (!mac_biba_dominate_element(&mac_biba->mb_rangehigh,
|
|
&mac_biba->mb_rangelow))
|
|
return (EINVAL);
|
|
} else {
|
|
if (mac_biba->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
|
|
mac_biba->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_biba_set_range(struct mac_biba *mac_biba, u_short typelow,
|
|
u_short gradelow, u_char *compartmentslow, u_short typehigh,
|
|
u_short gradehigh, u_char *compartmentshigh)
|
|
{
|
|
|
|
mac_biba->mb_rangelow.mbe_type = typelow;
|
|
mac_biba->mb_rangelow.mbe_grade = gradelow;
|
|
if (compartmentslow != NULL)
|
|
memcpy(mac_biba->mb_rangelow.mbe_compartments,
|
|
compartmentslow,
|
|
sizeof(mac_biba->mb_rangelow.mbe_compartments));
|
|
mac_biba->mb_rangehigh.mbe_type = typehigh;
|
|
mac_biba->mb_rangehigh.mbe_grade = gradehigh;
|
|
if (compartmentshigh != NULL)
|
|
memcpy(mac_biba->mb_rangehigh.mbe_compartments,
|
|
compartmentshigh,
|
|
sizeof(mac_biba->mb_rangehigh.mbe_compartments));
|
|
mac_biba->mb_flags |= MAC_BIBA_FLAG_RANGE;
|
|
}
|
|
|
|
static void
|
|
mac_biba_set_single(struct mac_biba *mac_biba, u_short type, u_short grade,
|
|
u_char *compartments)
|
|
{
|
|
|
|
mac_biba->mb_single.mbe_type = type;
|
|
mac_biba->mb_single.mbe_grade = grade;
|
|
if (compartments != NULL)
|
|
memcpy(mac_biba->mb_single.mbe_compartments, compartments,
|
|
sizeof(mac_biba->mb_single.mbe_compartments));
|
|
mac_biba->mb_flags |= MAC_BIBA_FLAG_SINGLE;
|
|
}
|
|
|
|
static void
|
|
mac_biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
|
|
{
|
|
|
|
KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
|
|
("mac_biba_copy_range: labelfrom not range"));
|
|
|
|
labelto->mb_rangelow = labelfrom->mb_rangelow;
|
|
labelto->mb_rangehigh = labelfrom->mb_rangehigh;
|
|
labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
|
|
}
|
|
|
|
static void
|
|
mac_biba_copy_single(struct mac_biba *labelfrom, struct mac_biba *labelto)
|
|
{
|
|
|
|
KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_SINGLE) != 0,
|
|
("mac_biba_copy_single: labelfrom not single"));
|
|
|
|
labelto->mb_single = labelfrom->mb_single;
|
|
labelto->mb_flags |= MAC_BIBA_FLAG_SINGLE;
|
|
}
|
|
|
|
static void
|
|
mac_biba_copy(struct mac_biba *source, struct mac_biba *dest)
|
|
{
|
|
|
|
if (source->mb_flags & MAC_BIBA_FLAG_SINGLE)
|
|
mac_biba_copy_single(source, dest);
|
|
if (source->mb_flags & MAC_BIBA_FLAG_RANGE)
|
|
mac_biba_copy_range(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Policy module operations.
|
|
*/
|
|
static void
|
|
mac_biba_destroy(struct mac_policy_conf *conf)
|
|
{
|
|
|
|
}
|
|
|
|
static void
|
|
mac_biba_init(struct mac_policy_conf *conf)
|
|
{
|
|
|
|
}
|
|
|
|
/*
|
|
* Label operations.
|
|
*/
|
|
static void
|
|
mac_biba_init_label(struct label *label)
|
|
{
|
|
|
|
SLOT(label) = biba_alloc(M_WAITOK);
|
|
}
|
|
|
|
static int
|
|
mac_biba_init_label_waitcheck(struct label *label, int flag)
|
|
{
|
|
|
|
SLOT(label) = biba_alloc(flag);
|
|
if (SLOT(label) == NULL)
|
|
return (ENOMEM);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_biba_destroy_label(struct label *label)
|
|
{
|
|
|
|
biba_free(SLOT(label));
|
|
SLOT(label) = NULL;
|
|
}
|
|
|
|
/*
|
|
* mac_biba_element_to_string() is basically an snprintf wrapper with
|
|
* the same properties as snprintf(). It returns the length it would
|
|
* have added to the string in the event the string is too short.
|
|
*/
|
|
static size_t
|
|
mac_biba_element_to_string(char *string, size_t size,
|
|
struct mac_biba_element *element)
|
|
{
|
|
int pos, bit = 1;
|
|
|
|
switch (element->mbe_type) {
|
|
case MAC_BIBA_TYPE_HIGH:
|
|
return (snprintf(string, size, "high"));
|
|
|
|
case MAC_BIBA_TYPE_LOW:
|
|
return (snprintf(string, size, "low"));
|
|
|
|
case MAC_BIBA_TYPE_EQUAL:
|
|
return (snprintf(string, size, "equal"));
|
|
|
|
case MAC_BIBA_TYPE_GRADE:
|
|
pos = snprintf(string, size, "%d:", element->mbe_grade);
|
|
for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++) {
|
|
if (MAC_BIBA_BIT_TEST(bit, element->mbe_compartments))
|
|
pos += snprintf(string + pos, size - pos,
|
|
"%d+", bit);
|
|
}
|
|
if (string[pos - 1] == '+' || string[pos - 1] == ':')
|
|
string[--pos] = '\0';
|
|
return (pos);
|
|
|
|
default:
|
|
panic("mac_biba_element_to_string: invalid type (%d)",
|
|
element->mbe_type);
|
|
}
|
|
}
|
|
|
|
static int
|
|
mac_biba_to_string(char *string, size_t size, size_t *caller_len,
|
|
struct mac_biba *mac_biba)
|
|
{
|
|
size_t left, len;
|
|
char *curptr;
|
|
|
|
bzero(string, size);
|
|
curptr = string;
|
|
left = size;
|
|
|
|
if (mac_biba->mb_flags & MAC_BIBA_FLAG_SINGLE) {
|
|
len = mac_biba_element_to_string(curptr, left,
|
|
&mac_biba->mb_single);
|
|
if (len >= left)
|
|
return (EINVAL);
|
|
left -= len;
|
|
curptr += len;
|
|
}
|
|
|
|
if (mac_biba->mb_flags & MAC_BIBA_FLAG_RANGE) {
|
|
len = snprintf(curptr, left, "(");
|
|
if (len >= left)
|
|
return (EINVAL);
|
|
left -= len;
|
|
curptr += len;
|
|
|
|
len = mac_biba_element_to_string(curptr, left,
|
|
&mac_biba->mb_rangelow);
|
|
if (len >= left)
|
|
return (EINVAL);
|
|
left -= len;
|
|
curptr += len;
|
|
|
|
len = snprintf(curptr, left, "-");
|
|
if (len >= left)
|
|
return (EINVAL);
|
|
left -= len;
|
|
curptr += len;
|
|
|
|
len = mac_biba_element_to_string(curptr, left,
|
|
&mac_biba->mb_rangehigh);
|
|
if (len >= left)
|
|
return (EINVAL);
|
|
left -= len;
|
|
curptr += len;
|
|
|
|
len = snprintf(curptr, left, ")");
|
|
if (len >= left)
|
|
return (EINVAL);
|
|
left -= len;
|
|
curptr += len;
|
|
}
|
|
|
|
*caller_len = strlen(string);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_externalize_label(struct label *label, char *element_name,
|
|
char *element_data, size_t size, size_t *len, int *claimed)
|
|
{
|
|
struct mac_biba *mac_biba;
|
|
int error;
|
|
|
|
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
|
|
return (0);
|
|
|
|
(*claimed)++;
|
|
|
|
mac_biba = SLOT(label);
|
|
error = mac_biba_to_string(element_data, size, len, mac_biba);
|
|
if (error)
|
|
return (error);
|
|
|
|
*len = strlen(element_data);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_parse_element(struct mac_biba_element *element, char *string)
|
|
{
|
|
|
|
if (strcmp(string, "high") == 0 ||
|
|
strcmp(string, "hi") == 0) {
|
|
element->mbe_type = MAC_BIBA_TYPE_HIGH;
|
|
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
|
|
} else if (strcmp(string, "low") == 0 ||
|
|
strcmp(string, "lo") == 0) {
|
|
element->mbe_type = MAC_BIBA_TYPE_LOW;
|
|
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
|
|
} else if (strcmp(string, "equal") == 0 ||
|
|
strcmp(string, "eq") == 0) {
|
|
element->mbe_type = MAC_BIBA_TYPE_EQUAL;
|
|
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
|
|
} else {
|
|
char *p0, *p1;
|
|
int d;
|
|
|
|
p0 = string;
|
|
d = strtol(p0, &p1, 10);
|
|
|
|
if (d < 0 || d > 65535)
|
|
return (EINVAL);
|
|
element->mbe_type = MAC_BIBA_TYPE_GRADE;
|
|
element->mbe_grade = d;
|
|
|
|
if (*p1 != ':') {
|
|
if (p1 == p0 || *p1 != '\0')
|
|
return (EINVAL);
|
|
else
|
|
return (0);
|
|
}
|
|
else
|
|
if (*(p1 + 1) == '\0')
|
|
return (0);
|
|
|
|
while ((p0 = ++p1)) {
|
|
d = strtol(p0, &p1, 10);
|
|
if (d < 1 || d > MAC_BIBA_MAX_COMPARTMENTS)
|
|
return (EINVAL);
|
|
|
|
MAC_BIBA_BIT_SET(d, element->mbe_compartments);
|
|
|
|
if (*p1 == '\0')
|
|
break;
|
|
if (p1 == p0 || *p1 != '+')
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Note: destructively consumes the string, make a local copy before
|
|
* calling if that's a problem.
|
|
*/
|
|
static int
|
|
mac_biba_parse(struct mac_biba *mac_biba, char *string)
|
|
{
|
|
char *range, *rangeend, *rangehigh, *rangelow, *single;
|
|
int error;
|
|
|
|
/* Do we have a range? */
|
|
single = string;
|
|
range = index(string, '(');
|
|
if (range == single)
|
|
single = NULL;
|
|
rangelow = rangehigh = NULL;
|
|
if (range != NULL) {
|
|
/* Nul terminate the end of the single string. */
|
|
*range = '\0';
|
|
range++;
|
|
rangelow = range;
|
|
rangehigh = index(rangelow, '-');
|
|
if (rangehigh == NULL)
|
|
return (EINVAL);
|
|
rangehigh++;
|
|
if (*rangelow == '\0' || *rangehigh == '\0')
|
|
return (EINVAL);
|
|
rangeend = index(rangehigh, ')');
|
|
if (rangeend == NULL)
|
|
return (EINVAL);
|
|
if (*(rangeend + 1) != '\0')
|
|
return (EINVAL);
|
|
/* Nul terminate the ends of the ranges. */
|
|
*(rangehigh - 1) = '\0';
|
|
*rangeend = '\0';
|
|
}
|
|
KASSERT((rangelow != NULL && rangehigh != NULL) ||
|
|
(rangelow == NULL && rangehigh == NULL),
|
|
("mac_biba_internalize_label: range mismatch"));
|
|
|
|
bzero(mac_biba, sizeof(*mac_biba));
|
|
if (single != NULL) {
|
|
error = mac_biba_parse_element(&mac_biba->mb_single, single);
|
|
if (error)
|
|
return (error);
|
|
mac_biba->mb_flags |= MAC_BIBA_FLAG_SINGLE;
|
|
}
|
|
|
|
if (rangelow != NULL) {
|
|
error = mac_biba_parse_element(&mac_biba->mb_rangelow,
|
|
rangelow);
|
|
if (error)
|
|
return (error);
|
|
error = mac_biba_parse_element(&mac_biba->mb_rangehigh,
|
|
rangehigh);
|
|
if (error)
|
|
return (error);
|
|
mac_biba->mb_flags |= MAC_BIBA_FLAG_RANGE;
|
|
}
|
|
|
|
error = mac_biba_valid(mac_biba);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_internalize_label(struct label *label, char *element_name,
|
|
char *element_data, int *claimed)
|
|
{
|
|
struct mac_biba *mac_biba, mac_biba_temp;
|
|
int error;
|
|
|
|
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
|
|
return (0);
|
|
|
|
(*claimed)++;
|
|
|
|
error = mac_biba_parse(&mac_biba_temp, element_data);
|
|
if (error)
|
|
return (error);
|
|
|
|
mac_biba = SLOT(label);
|
|
*mac_biba = mac_biba_temp;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_biba_copy_label(struct label *src, struct label *dest)
|
|
{
|
|
|
|
*SLOT(dest) = *SLOT(src);
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: file system objects, and things that look
|
|
* a lot like file system objects.
|
|
*/
|
|
static void
|
|
mac_biba_create_devfs_device(dev_t dev, struct devfs_dirent *devfs_dirent,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *mac_biba;
|
|
int biba_type;
|
|
|
|
mac_biba = SLOT(label);
|
|
if (strcmp(dev->si_name, "null") == 0 ||
|
|
strcmp(dev->si_name, "zero") == 0 ||
|
|
strcmp(dev->si_name, "random") == 0 ||
|
|
strncmp(dev->si_name, "fd/", strlen("fd/")) == 0)
|
|
biba_type = MAC_BIBA_TYPE_EQUAL;
|
|
else if (ptys_equal &&
|
|
(strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
|
|
strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
|
|
biba_type = MAC_BIBA_TYPE_EQUAL;
|
|
else
|
|
biba_type = MAC_BIBA_TYPE_HIGH;
|
|
mac_biba_set_single(mac_biba, biba_type, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_devfs_directory(char *dirname, int dirnamelen,
|
|
struct devfs_dirent *devfs_dirent, struct label *label)
|
|
{
|
|
struct mac_biba *mac_biba;
|
|
|
|
mac_biba = SLOT(label);
|
|
mac_biba_set_single(mac_biba, MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd,
|
|
struct label *ddlabel, struct devfs_dirent *de, struct label *delabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(delabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_devfs_vnode(struct devfs_dirent *devfs_dirent,
|
|
struct label *direntlabel, struct vnode *vp, struct label *vnodelabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(direntlabel);
|
|
dest = SLOT(vnodelabel);
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mount(struct ucred *cred, struct mount *mp,
|
|
struct label *mntlabel, struct label *fslabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(mntlabel);
|
|
mac_biba_copy_single(source, dest);
|
|
dest = SLOT(fslabel);
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_root_mount(struct ucred *cred, struct mount *mp,
|
|
struct label *mntlabel, struct label *fslabel)
|
|
{
|
|
struct mac_biba *mac_biba;
|
|
|
|
/* Always mount root as high integrity. */
|
|
mac_biba = SLOT(fslabel);
|
|
mac_biba_set_single(mac_biba, MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
mac_biba = SLOT(mntlabel);
|
|
mac_biba_set_single(mac_biba, MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_relabel_vnode(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, struct label *label)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(label);
|
|
dest = SLOT(vnodelabel);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_update_devfsdirent(struct devfs_dirent *devfs_dirent,
|
|
struct label *direntlabel, struct vnode *vp, struct label *vnodelabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(vnodelabel);
|
|
dest = SLOT(direntlabel);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_associate_vnode_devfs(struct mount *mp, struct label *fslabel,
|
|
struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
|
|
struct label *vlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(delabel);
|
|
dest = SLOT(vlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_biba_associate_vnode_extattr(struct mount *mp, struct label *fslabel,
|
|
struct vnode *vp, struct label *vlabel)
|
|
{
|
|
struct mac_biba temp, *source, *dest;
|
|
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_mbuf_from_socket(struct socket *so, struct label *socketlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(socketlabel);
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_socket(struct ucred *cred, struct socket *socket,
|
|
struct label *socketlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(socketlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_pipe(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(pipelabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_socket_from_socket(struct socket *oldsocket,
|
|
struct label *oldsocketlabel, struct socket *newsocket,
|
|
struct label *newsocketlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(oldsocketlabel);
|
|
dest = SLOT(newsocketlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_relabel_socket(struct ucred *cred, struct socket *socket,
|
|
struct label *socketlabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(socketlabel);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_relabel_pipe(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(pipelabel);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct label *mbuflabel,
|
|
struct socket *socket, struct label *socketpeerlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mbuflabel);
|
|
dest = SLOT(socketpeerlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: network objects.
|
|
*/
|
|
static void
|
|
mac_biba_set_socket_peer_from_socket(struct socket *oldsocket,
|
|
struct label *oldsocketlabel, struct socket *newsocket,
|
|
struct label *newsocketpeerlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(oldsocketlabel);
|
|
dest = SLOT(newsocketpeerlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d,
|
|
struct label *bpflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&cred->cr_label);
|
|
dest = SLOT(bpflabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_ifnet(struct ifnet *ifnet, struct label *ifnetlabel)
|
|
{
|
|
char tifname[IFNAMSIZ], ifname[IFNAMSIZ], *p, *q;
|
|
char tiflist[sizeof(trusted_interfaces)];
|
|
struct mac_biba *dest;
|
|
int len, grade;
|
|
|
|
dest = SLOT(ifnetlabel);
|
|
|
|
if (ifnet->if_type == IFT_LOOP) {
|
|
grade = MAC_BIBA_TYPE_EQUAL;
|
|
goto set;
|
|
}
|
|
|
|
if (trust_all_interfaces) {
|
|
grade = MAC_BIBA_TYPE_HIGH;
|
|
goto set;
|
|
}
|
|
|
|
grade = MAC_BIBA_TYPE_LOW;
|
|
|
|
if (trusted_interfaces[0] == '\0' ||
|
|
!strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
|
|
goto set;
|
|
|
|
bzero(tiflist, sizeof(tiflist));
|
|
for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
|
|
if(*p != ' ' && *p != '\t')
|
|
*q = *p;
|
|
|
|
snprintf(ifname, IFNAMSIZ, "%s%d", ifnet->if_name, ifnet->if_unit);
|
|
|
|
for (p = q = tiflist;; p++) {
|
|
if (*p == ',' || *p == '\0') {
|
|
len = p - q;
|
|
if (len < IFNAMSIZ) {
|
|
bzero(tifname, sizeof(tifname));
|
|
bcopy(q, tifname, len);
|
|
if (strcmp(tifname, ifname) == 0) {
|
|
grade = MAC_BIBA_TYPE_HIGH;
|
|
break;
|
|
}
|
|
} 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, grade, 0, NULL);
|
|
mac_biba_set_range(dest, grade, 0, NULL, grade, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_ipq(struct mbuf *fragment, struct label *fragmentlabel,
|
|
struct ipq *ipq, struct label *ipqlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(fragmentlabel);
|
|
dest = SLOT(ipqlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_datagram_from_ipq(struct ipq *ipq, struct label *ipqlabel,
|
|
struct mbuf *datagram, struct label *datagramlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(ipqlabel);
|
|
dest = SLOT(datagramlabel);
|
|
|
|
/* Just use the head, since we require them all to match. */
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_fragment(struct mbuf *datagram, struct label *datagramlabel,
|
|
struct mbuf *fragment, struct label *fragmentlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(datagramlabel);
|
|
dest = SLOT(fragmentlabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mbuf_from_mbuf(struct mbuf *oldmbuf,
|
|
struct label *oldmbuflabel, struct mbuf *newmbuf,
|
|
struct label *newmbuflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(oldmbuflabel);
|
|
dest = SLOT(newmbuflabel);
|
|
|
|
/*
|
|
* Because the source mbuf may not yet have been "created",
|
|
* just initialized, we do a conditional copy. Since we don't
|
|
* allow mbufs to have ranges, do a KASSERT to make sure that
|
|
* doesn't happen.
|
|
*/
|
|
KASSERT((source->mb_flags & MAC_BIBA_FLAG_RANGE) == 0,
|
|
("mac_biba_create_mbuf_from_mbuf: source mbuf has range"));
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mbuf_linklayer(struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *mbuf, struct label *mbuflabel)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_biba_set_single(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct label *bpflabel,
|
|
struct mbuf *mbuf, struct label *mbuflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(bpflabel);
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mbuf_from_ifnet(struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(ifnetlabel);
|
|
dest = SLOT(mbuflabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mbuf_multicast_encap(struct mbuf *oldmbuf,
|
|
struct label *oldmbuflabel, struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *newmbuf, struct label *newmbuflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(oldmbuflabel);
|
|
dest = SLOT(newmbuflabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_mbuf_netlayer(struct mbuf *oldmbuf, struct label *oldmbuflabel,
|
|
struct mbuf *newmbuf, struct label *newmbuflabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(oldmbuflabel);
|
|
dest = SLOT(newmbuflabel);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_biba_fragment_match(struct mbuf *fragment, struct label *fragmentlabel,
|
|
struct ipq *ipq, struct label *ipqlabel)
|
|
{
|
|
struct mac_biba *a, *b;
|
|
|
|
a = SLOT(ipqlabel);
|
|
b = SLOT(fragmentlabel);
|
|
|
|
return (mac_biba_equal_single(a, b));
|
|
}
|
|
|
|
static void
|
|
mac_biba_relabel_ifnet(struct ucred *cred, struct ifnet *ifnet,
|
|
struct label *ifnetlabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(ifnetlabel);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_update_ipq(struct mbuf *fragment, struct label *fragmentlabel,
|
|
struct ipq *ipq, struct label *ipqlabel)
|
|
{
|
|
|
|
/* NOOP: we only accept matching labels, so no need to update */
|
|
}
|
|
|
|
/*
|
|
* Labeling event operations: processes.
|
|
*/
|
|
static void
|
|
mac_biba_create_cred(struct ucred *cred_parent, struct ucred *cred_child)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&cred_parent->cr_label);
|
|
dest = SLOT(&cred_child->cr_label);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
mac_biba_copy_range(source, dest);
|
|
}
|
|
|
|
static void
|
|
mac_biba_execve_transition(struct ucred *old, struct ucred *new,
|
|
struct vnode *vp, struct label *vnodelabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(&old->cr_label);
|
|
dest = SLOT(&new->cr_label);
|
|
|
|
mac_biba_copy_single(source, dest);
|
|
mac_biba_copy_range(source, dest);
|
|
}
|
|
|
|
static int
|
|
mac_biba_execve_will_transition(struct ucred *old, struct vnode *vp,
|
|
struct label *vnodelabel)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_proc0(struct ucred *cred)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(&cred->cr_label);
|
|
|
|
mac_biba_set_single(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
mac_biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL,
|
|
MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_create_proc1(struct ucred *cred)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(&cred->cr_label);
|
|
|
|
mac_biba_set_single(dest, MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
mac_biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL,
|
|
MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
mac_biba_relabel_cred(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(&cred->cr_label);
|
|
|
|
mac_biba_copy(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Access control checks.
|
|
*/
|
|
static int
|
|
mac_biba_check_bpfdesc_receive(struct bpf_d *bpf_d, struct label *bpflabel,
|
|
struct ifnet *ifnet, struct label *ifnetlabel)
|
|
{
|
|
struct mac_biba *a, *b;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
a = SLOT(bpflabel);
|
|
b = SLOT(ifnetlabel);
|
|
|
|
if (mac_biba_equal_single(a, b))
|
|
return (0);
|
|
return (EACCES);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_cred_relabel(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
struct mac_biba *subj, *new;
|
|
int error;
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
new = SLOT(newlabel);
|
|
|
|
/*
|
|
* If there is a Biba label update for the credential, it may
|
|
* be an update of the single, range, or both.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
|
|
/*
|
|
* To change the Biba single label on a credential, the
|
|
* new single label must be in the current range.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_SINGLE &&
|
|
!mac_biba_single_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the Biba range on a credential, the new
|
|
* range label must be in the current range.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_RANGE &&
|
|
!mac_biba_range_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To have EQUAL in any component of the new credential
|
|
* Biba label, the subject must already have EQUAL in
|
|
* their label.
|
|
*/
|
|
if (mac_biba_contains_equal(new)) {
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* XXXMAC: Additional consistency tests regarding the
|
|
* single and range of the new label might be performed
|
|
* here.
|
|
*/
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_cred_visible(struct ucred *u1, struct ucred *u2)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&u1->cr_label);
|
|
obj = SLOT(&u2->cr_label);
|
|
|
|
/* XXX: range */
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (ESRCH);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_ifnet_relabel(struct ucred *cred, struct ifnet *ifnet,
|
|
struct label *ifnetlabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *subj, *new;
|
|
int error;
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
new = SLOT(newlabel);
|
|
|
|
/*
|
|
* If there is a Biba label update for the interface, it may
|
|
* be an update of the single, range, or both.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Relabling network interfaces requires Biba privilege.
|
|
*/
|
|
error = mac_biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
|
|
/*
|
|
* Rely on the traditional superuser status for the Biba
|
|
* interface relabel requirements. XXXMAC: This will go
|
|
* away.
|
|
*/
|
|
error = suser_cred(cred, 0);
|
|
if (error)
|
|
return (EPERM);
|
|
|
|
/*
|
|
* XXXMAC: Additional consistency tests regarding the single
|
|
* and the range of the new label might be performed here.
|
|
*/
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_ifnet_transmit(struct ifnet *ifnet, struct label *ifnetlabel,
|
|
struct mbuf *m, struct label *mbuflabel)
|
|
{
|
|
struct mac_biba *p, *i;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mbuflabel);
|
|
i = SLOT(ifnetlabel);
|
|
|
|
return (mac_biba_single_in_range(p, i) ? 0 : EACCES);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_mount_stat(struct ucred *cred, struct mount *mp,
|
|
struct label *mntlabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(mntlabel);
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel, unsigned long cmd, void /* caddr_t */ *data)
|
|
{
|
|
|
|
if(!mac_biba_enabled)
|
|
return (0);
|
|
|
|
/* XXX: This will be implemented soon... */
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_pipe_poll(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT((pipelabel));
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_pipe_read(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT((pipelabel));
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_pipe_relabel(struct ucred *cred, struct pipe *pipe,
|
|
struct label *pipelabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *subj, *obj, *new;
|
|
int error;
|
|
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(pipelabel);
|
|
|
|
/*
|
|
* If there is a Biba label update for a pipe, it must be a
|
|
* single update.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAG_SINGLE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To perform a relabel of a pipe (Biba label or not), Biba must
|
|
* authorize the relabel.
|
|
*/
|
|
if (!mac_biba_single_in_range(obj, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_SINGLE) {
|
|
/*
|
|
* To change the Biba label on a pipe, the new pipe label
|
|
* must be in the subject range.
|
|
*/
|
|
if (!mac_biba_single_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the Biba label on a pipe to be EQUAL, the
|
|
* subject must have appropriate privilege.
|
|
*/
|
|
if (mac_biba_contains_equal(new)) {
|
|
error = mac_biba_subject_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_system_swapon(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_subject_privileged(subj))
|
|
return (EPERM);
|
|
|
|
if (!mac_biba_high_single(obj))
|
|
return (EACCES);
|
|
|
|
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_exec(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_vnode_getacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, acl_type_t type)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, int attrnamespace, const char *name, struct uio *uio)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_vnode_link(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct vnode *vp, struct label *label,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_biba_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(label);
|
|
|
|
if (!mac_biba_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dlabel, struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!mac_biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(dlabel);
|
|
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
|
|
struct label *label, int prot)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
/*
|
|
* Rely on the use of open()-time protections to handle
|
|
* non-revocation cases.
|
|
*/
|
|
if (!mac_biba_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(&cred->cr_label);
|
|
obj = SLOT(label);
|
|
|
|
if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
|
|
if (!mac_biba_dominate_single(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
if (prot & VM_PROT_WRITE) {
|
|
if (!mac_biba_dominate_single(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_biba_check_vnode_open(struct ucred *cred, struct vnode *vp,
|
|
struct label *vnodelabel, 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_destroy = mac_biba_destroy,
|
|
.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_ipq_label = mac_biba_init_label,
|
|
.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_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_pipe_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_devfs_vnode = mac_biba_create_devfs_vnode,
|
|
.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_ipq = mac_biba_create_ipq,
|
|
.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_create_cred = mac_biba_create_cred,
|
|
.mpo_execve_transition = mac_biba_execve_transition,
|
|
.mpo_execve_will_transition = mac_biba_execve_will_transition,
|
|
.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_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_system_swapon = mac_biba_check_system_swapon,
|
|
.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_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_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, trustedbsd_mac_biba, "TrustedBSD MAC/Biba",
|
|
MPC_LOADTIME_FLAG_NOTLATE, &mac_biba_slot);
|