28b4a002d6
Code should just use the devtoname() function to obtain the name of a character device. Also add const keywords to pieces of code that need it to build properly. MFC after: 2 weeks
3783 lines
83 KiB
C
3783 lines
83 KiB
C
/*-
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* Copyright (c) 1999-2002, 2007-2011 Robert N. M. Watson
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* Copyright (c) 2001-2005 McAfee, Inc.
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* Copyright (c) 2006 SPARTA, 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 McAfee
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* Research, the Security Research Division of McAfee, 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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* This software was enhanced by SPARTA ISSO under SPAWAR contract
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* N66001-04-C-6019 ("SEFOS").
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*
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* This software was developed at the University of Cambridge Computer
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* Laboratory with support from a grant from Google, Inc.
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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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*
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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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*
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* Biba fixed label mandatory integrity policy.
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*/
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#include <sys/param.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/ksem.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/mount.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/sysent.h>
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#include <sys/systm.h>
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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/sx.h>
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#include <sys/sysctl.h>
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#include <sys/msg.h>
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#include <sys/sem.h>
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#include <sys/shm.h>
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#include <fs/devfs/devfs.h>
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#include <net/bpfdesc.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip_var.h>
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#include <vm/uma.h>
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#include <vm/vm.h>
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#include <security/mac/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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static 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 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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&biba_label_size, 0, "Size of struct mac_biba");
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static int biba_enabled = 1;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RW, &biba_enabled,
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0, "Enforce MAC/Biba policy");
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TUNABLE_INT("security.mac.biba.enabled", &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, &ptys_equal,
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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 interfaces_equal = 1;
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SYSCTL_INT(_security_mac_biba, OID_AUTO, interfaces_equal, CTLFLAG_RW,
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&interfaces_equal, 0, "Label network interfaces as biba/equal on create");
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TUNABLE_INT("security.mac.biba.interfaces_equal", &interfaces_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 biba_slot;
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#define SLOT(l) ((struct mac_biba *)mac_label_get((l), biba_slot))
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#define SLOT_SET(l, val) mac_label_set((l), biba_slot, (uintptr_t)(val))
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static uma_zone_t zone_biba;
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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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return (uma_zalloc(zone_biba, flag | M_ZERO));
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}
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static void
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biba_free(struct mac_biba *mb)
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{
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if (mb != NULL)
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uma_zfree(zone_biba, mb);
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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 *mb, int flags)
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{
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if ((mb->mb_flags & flags) != mb->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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biba_dominate_element(struct mac_biba_element *a, 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("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("biba_dominate_element: b->mbe_type invalid");
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}
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default:
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panic("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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biba_subject_dominate_high(struct mac_biba *mb)
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{
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struct mac_biba_element *element;
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KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_effective_in_range: mb not effective"));
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element = &mb->mb_effective;
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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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biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
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{
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return (biba_dominate_element(&rangeb->mb_rangehigh,
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&rangea->mb_rangehigh) &&
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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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biba_effective_in_range(struct mac_biba *effective, struct mac_biba *range)
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{
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KASSERT((effective->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_effective_in_range: a not effective"));
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KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
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("biba_effective_in_range: b not range"));
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return (biba_dominate_element(&range->mb_rangehigh,
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&effective->mb_effective) &&
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biba_dominate_element(&effective->mb_effective,
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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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biba_dominate_effective(struct mac_biba *a, struct mac_biba *b)
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{
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KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_dominate_effective: a not effective"));
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KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_dominate_effective: b not effective"));
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return (biba_dominate_element(&a->mb_effective, &b->mb_effective));
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}
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static int
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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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biba_equal_effective(struct mac_biba *a, struct mac_biba *b)
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{
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KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_equal_effective: a not effective"));
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KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_equal_effective: b not effective"));
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return (biba_equal_element(&a->mb_effective, &b->mb_effective));
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}
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static int
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biba_contains_equal(struct mac_biba *mb)
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{
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if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
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if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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}
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if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
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if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
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return (1);
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if (mb->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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static int
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biba_subject_privileged(struct mac_biba *mb)
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{
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KASSERT((mb->mb_flags & MAC_BIBA_FLAGS_BOTH) == MAC_BIBA_FLAGS_BOTH,
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("biba_subject_privileged: subject doesn't have both labels"));
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/* If the effective is EQUAL, it's ok. */
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if (mb->mb_effective.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 (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL ||
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mb->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 (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_LOW &&
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mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_HIGH)
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return (0);
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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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biba_high_effective(struct mac_biba *mb)
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{
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KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
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("biba_equal_effective: mb not effective"));
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return (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_HIGH);
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}
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static int
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biba_valid(struct mac_biba *mb)
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{
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if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
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switch (mb->mb_effective.mbe_type) {
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case MAC_BIBA_TYPE_GRADE:
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break;
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case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_HIGH:
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case MAC_BIBA_TYPE_LOW:
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if (mb->mb_effective.mbe_grade != 0 ||
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!MAC_BIBA_BIT_SET_EMPTY(
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mb->mb_effective.mbe_compartments))
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return (EINVAL);
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break;
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default:
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return (EINVAL);
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}
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} else {
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if (mb->mb_effective.mbe_type != MAC_BIBA_TYPE_UNDEF)
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return (EINVAL);
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}
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if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
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switch (mb->mb_rangelow.mbe_type) {
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case MAC_BIBA_TYPE_GRADE:
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break;
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case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_HIGH:
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case MAC_BIBA_TYPE_LOW:
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if (mb->mb_rangelow.mbe_grade != 0 ||
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!MAC_BIBA_BIT_SET_EMPTY(
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mb->mb_rangelow.mbe_compartments))
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return (EINVAL);
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break;
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default:
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return (EINVAL);
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}
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switch (mb->mb_rangehigh.mbe_type) {
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case MAC_BIBA_TYPE_GRADE:
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break;
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case MAC_BIBA_TYPE_EQUAL:
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case MAC_BIBA_TYPE_HIGH:
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case MAC_BIBA_TYPE_LOW:
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if (mb->mb_rangehigh.mbe_grade != 0 ||
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!MAC_BIBA_BIT_SET_EMPTY(
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mb->mb_rangehigh.mbe_compartments))
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return (EINVAL);
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break;
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default:
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return (EINVAL);
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}
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if (!biba_dominate_element(&mb->mb_rangehigh,
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&mb->mb_rangelow))
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return (EINVAL);
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} else {
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if (mb->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
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mb->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
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return (EINVAL);
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}
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return (0);
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}
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static void
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biba_set_range(struct mac_biba *mb, u_short typelow, u_short gradelow,
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u_char *compartmentslow, u_short typehigh, u_short gradehigh,
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u_char *compartmentshigh)
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{
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mb->mb_rangelow.mbe_type = typelow;
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mb->mb_rangelow.mbe_grade = gradelow;
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if (compartmentslow != NULL)
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memcpy(mb->mb_rangelow.mbe_compartments, compartmentslow,
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sizeof(mb->mb_rangelow.mbe_compartments));
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mb->mb_rangehigh.mbe_type = typehigh;
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mb->mb_rangehigh.mbe_grade = gradehigh;
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if (compartmentshigh != NULL)
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memcpy(mb->mb_rangehigh.mbe_compartments, compartmentshigh,
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sizeof(mb->mb_rangehigh.mbe_compartments));
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mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
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}
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static void
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biba_set_effective(struct mac_biba *mb, u_short type, u_short grade,
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u_char *compartments)
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{
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mb->mb_effective.mbe_type = type;
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mb->mb_effective.mbe_grade = grade;
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if (compartments != NULL)
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memcpy(mb->mb_effective.mbe_compartments, compartments,
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sizeof(mb->mb_effective.mbe_compartments));
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mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
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}
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static void
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biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
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{
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KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
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("biba_copy_range: labelfrom not range"));
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labelto->mb_rangelow = labelfrom->mb_rangelow;
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labelto->mb_rangehigh = labelfrom->mb_rangehigh;
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labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
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}
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static void
|
|
biba_copy_effective(struct mac_biba *labelfrom, struct mac_biba *labelto)
|
|
{
|
|
|
|
KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
|
|
("biba_copy_effective: labelfrom not effective"));
|
|
|
|
labelto->mb_effective = labelfrom->mb_effective;
|
|
labelto->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
|
|
}
|
|
|
|
static void
|
|
biba_copy(struct mac_biba *source, struct mac_biba *dest)
|
|
{
|
|
|
|
if (source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE)
|
|
biba_copy_effective(source, dest);
|
|
if (source->mb_flags & MAC_BIBA_FLAG_RANGE)
|
|
biba_copy_range(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Policy module operations.
|
|
*/
|
|
static void
|
|
biba_init(struct mac_policy_conf *conf)
|
|
{
|
|
|
|
zone_biba = uma_zcreate("mac_biba", sizeof(struct mac_biba), NULL,
|
|
NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
|
|
}
|
|
|
|
/*
|
|
* Label operations.
|
|
*/
|
|
static void
|
|
biba_init_label(struct label *label)
|
|
{
|
|
|
|
SLOT_SET(label, biba_alloc(M_WAITOK));
|
|
}
|
|
|
|
static int
|
|
biba_init_label_waitcheck(struct label *label, int flag)
|
|
{
|
|
|
|
SLOT_SET(label, biba_alloc(flag));
|
|
if (SLOT(label) == NULL)
|
|
return (ENOMEM);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_destroy_label(struct label *label)
|
|
{
|
|
|
|
biba_free(SLOT(label));
|
|
SLOT_SET(label, NULL);
|
|
}
|
|
|
|
/*
|
|
* biba_element_to_string() accepts an sbuf and Biba element. It converts
|
|
* the Biba element to a string and stores the result in the sbuf; if there
|
|
* isn't space in the sbuf, -1 is returned.
|
|
*/
|
|
static int
|
|
biba_element_to_string(struct sbuf *sb, struct mac_biba_element *element)
|
|
{
|
|
int i, first;
|
|
|
|
switch (element->mbe_type) {
|
|
case MAC_BIBA_TYPE_HIGH:
|
|
return (sbuf_printf(sb, "high"));
|
|
|
|
case MAC_BIBA_TYPE_LOW:
|
|
return (sbuf_printf(sb, "low"));
|
|
|
|
case MAC_BIBA_TYPE_EQUAL:
|
|
return (sbuf_printf(sb, "equal"));
|
|
|
|
case MAC_BIBA_TYPE_GRADE:
|
|
if (sbuf_printf(sb, "%d", element->mbe_grade) == -1)
|
|
return (-1);
|
|
|
|
first = 1;
|
|
for (i = 1; i <= MAC_BIBA_MAX_COMPARTMENTS; i++) {
|
|
if (MAC_BIBA_BIT_TEST(i, element->mbe_compartments)) {
|
|
if (first) {
|
|
if (sbuf_putc(sb, ':') == -1)
|
|
return (-1);
|
|
if (sbuf_printf(sb, "%d", i) == -1)
|
|
return (-1);
|
|
first = 0;
|
|
} else {
|
|
if (sbuf_printf(sb, "+%d", i) == -1)
|
|
return (-1);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
|
|
default:
|
|
panic("biba_element_to_string: invalid type (%d)",
|
|
element->mbe_type);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* biba_to_string() converts a Biba label to a string, and places the results
|
|
* in the passed sbuf. It returns 0 on success, or EINVAL if there isn't
|
|
* room in the sbuf. Note: the sbuf will be modified even in a failure case,
|
|
* so the caller may need to revert the sbuf by restoring the offset if
|
|
* that's undesired.
|
|
*/
|
|
static int
|
|
biba_to_string(struct sbuf *sb, struct mac_biba *mb)
|
|
{
|
|
|
|
if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
|
|
if (biba_element_to_string(sb, &mb->mb_effective) == -1)
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
|
|
if (sbuf_putc(sb, '(') == -1)
|
|
return (EINVAL);
|
|
|
|
if (biba_element_to_string(sb, &mb->mb_rangelow) == -1)
|
|
return (EINVAL);
|
|
|
|
if (sbuf_putc(sb, '-') == -1)
|
|
return (EINVAL);
|
|
|
|
if (biba_element_to_string(sb, &mb->mb_rangehigh) == -1)
|
|
return (EINVAL);
|
|
|
|
if (sbuf_putc(sb, ')') == -1)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_externalize_label(struct label *label, char *element_name,
|
|
struct sbuf *sb, int *claimed)
|
|
{
|
|
struct mac_biba *mb;
|
|
|
|
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
|
|
return (0);
|
|
|
|
(*claimed)++;
|
|
|
|
mb = SLOT(label);
|
|
return (biba_to_string(sb, mb));
|
|
}
|
|
|
|
static int
|
|
biba_parse_element(struct mac_biba_element *element, char *string)
|
|
{
|
|
char *compartment, *end, *grade;
|
|
int value;
|
|
|
|
if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
|
|
element->mbe_type = MAC_BIBA_TYPE_HIGH;
|
|
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
|
|
} else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
|
|
element->mbe_type = MAC_BIBA_TYPE_LOW;
|
|
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
|
|
} else if (strcmp(string, "equal") == 0 ||
|
|
strcmp(string, "eq") == 0) {
|
|
element->mbe_type = MAC_BIBA_TYPE_EQUAL;
|
|
element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
|
|
} else {
|
|
element->mbe_type = MAC_BIBA_TYPE_GRADE;
|
|
|
|
/*
|
|
* Numeric grade piece of the element.
|
|
*/
|
|
grade = strsep(&string, ":");
|
|
value = strtol(grade, &end, 10);
|
|
if (end == grade || *end != '\0')
|
|
return (EINVAL);
|
|
if (value < 0 || value > 65535)
|
|
return (EINVAL);
|
|
element->mbe_grade = value;
|
|
|
|
/*
|
|
* Optional compartment piece of the element. If none are
|
|
* included, we assume that the label has no compartments.
|
|
*/
|
|
if (string == NULL)
|
|
return (0);
|
|
if (*string == '\0')
|
|
return (0);
|
|
|
|
while ((compartment = strsep(&string, "+")) != NULL) {
|
|
value = strtol(compartment, &end, 10);
|
|
if (compartment == end || *end != '\0')
|
|
return (EINVAL);
|
|
if (value < 1 || value > MAC_BIBA_MAX_COMPARTMENTS)
|
|
return (EINVAL);
|
|
MAC_BIBA_BIT_SET(value, element->mbe_compartments);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Note: destructively consumes the string, make a local copy before calling
|
|
* if that's a problem.
|
|
*/
|
|
static int
|
|
biba_parse(struct mac_biba *mb, char *string)
|
|
{
|
|
char *rangehigh, *rangelow, *effective;
|
|
int error;
|
|
|
|
effective = strsep(&string, "(");
|
|
if (*effective == '\0')
|
|
effective = NULL;
|
|
|
|
if (string != NULL) {
|
|
rangelow = strsep(&string, "-");
|
|
if (string == NULL)
|
|
return (EINVAL);
|
|
rangehigh = strsep(&string, ")");
|
|
if (string == NULL)
|
|
return (EINVAL);
|
|
if (*string != '\0')
|
|
return (EINVAL);
|
|
} else {
|
|
rangelow = NULL;
|
|
rangehigh = NULL;
|
|
}
|
|
|
|
KASSERT((rangelow != NULL && rangehigh != NULL) ||
|
|
(rangelow == NULL && rangehigh == NULL),
|
|
("biba_parse: range mismatch"));
|
|
|
|
bzero(mb, sizeof(*mb));
|
|
if (effective != NULL) {
|
|
error = biba_parse_element(&mb->mb_effective, effective);
|
|
if (error)
|
|
return (error);
|
|
mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
|
|
}
|
|
|
|
if (rangelow != NULL) {
|
|
error = biba_parse_element(&mb->mb_rangelow, rangelow);
|
|
if (error)
|
|
return (error);
|
|
error = biba_parse_element(&mb->mb_rangehigh, rangehigh);
|
|
if (error)
|
|
return (error);
|
|
mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
|
|
}
|
|
|
|
error = biba_valid(mb);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_internalize_label(struct label *label, char *element_name,
|
|
char *element_data, int *claimed)
|
|
{
|
|
struct mac_biba *mb, mb_temp;
|
|
int error;
|
|
|
|
if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
|
|
return (0);
|
|
|
|
(*claimed)++;
|
|
|
|
error = biba_parse(&mb_temp, element_data);
|
|
if (error)
|
|
return (error);
|
|
|
|
mb = SLOT(label);
|
|
*mb = mb_temp;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_copy_label(struct label *src, struct label *dest)
|
|
{
|
|
|
|
*SLOT(dest) = *SLOT(src);
|
|
}
|
|
|
|
/*
|
|
* Object-specific entry point implementations are sorted alphabetically by
|
|
* object type name and then by operation.
|
|
*/
|
|
static int
|
|
biba_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
|
|
struct ifnet *ifp, struct label *ifplabel)
|
|
{
|
|
struct mac_biba *a, *b;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
a = SLOT(dlabel);
|
|
b = SLOT(ifplabel);
|
|
|
|
if (biba_equal_effective(a, b))
|
|
return (0);
|
|
return (EACCES);
|
|
}
|
|
|
|
static void
|
|
biba_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
|
|
struct label *dlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(dlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(dlabel);
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_cred_associate_nfsd(struct ucred *cred)
|
|
{
|
|
struct mac_biba *label;
|
|
|
|
label = SLOT(cred->cr_label);
|
|
biba_set_effective(label, MAC_BIBA_TYPE_LOW, 0, NULL);
|
|
biba_set_range(label, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
|
|
0, NULL);
|
|
}
|
|
|
|
static int
|
|
biba_cred_check_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 effective, range, or both.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
|
|
/*
|
|
* If the change request modifies both the Biba label
|
|
* effective and range, check that the new effective will be
|
|
* in the new range.
|
|
*/
|
|
if ((new->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
|
|
MAC_BIBA_FLAGS_BOTH &&
|
|
!biba_effective_in_range(new, new))
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* To change the Biba effective label on a credential, the
|
|
* new effective label must be in the current range.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE &&
|
|
!biba_effective_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 &&
|
|
!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 (biba_contains_equal(new)) {
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_cred_check_visible(struct ucred *u1, struct ucred *u2)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(u1->cr_label);
|
|
obj = SLOT(u2->cr_label);
|
|
|
|
/* XXX: range */
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (ESRCH);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_cred_create_init(struct ucred *cred)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(cred->cr_label);
|
|
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
|
|
0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_cred_create_swapper(struct ucred *cred)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(cred->cr_label);
|
|
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
|
|
0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_cred_relabel(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(cred->cr_label);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_devfs_create_device(struct ucred *cred, struct mount *mp,
|
|
struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
|
|
{
|
|
struct mac_biba *mb;
|
|
const char *dn;
|
|
int biba_type;
|
|
|
|
mb = SLOT(delabel);
|
|
dn = devtoname(dev);
|
|
if (strcmp(dn, "null") == 0 ||
|
|
strcmp(dn, "zero") == 0 ||
|
|
strcmp(dn, "random") == 0 ||
|
|
strncmp(dn, "fd/", strlen("fd/")) == 0)
|
|
biba_type = MAC_BIBA_TYPE_EQUAL;
|
|
else if (ptys_equal &&
|
|
(strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
|
|
strncmp(dn, "pts/", strlen("pts/")) == 0 ||
|
|
strncmp(dn, "ptyp", strlen("ptyp")) == 0))
|
|
biba_type = MAC_BIBA_TYPE_EQUAL;
|
|
else
|
|
biba_type = MAC_BIBA_TYPE_HIGH;
|
|
biba_set_effective(mb, biba_type, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
|
|
struct devfs_dirent *de, struct label *delabel)
|
|
{
|
|
struct mac_biba *mb;
|
|
|
|
mb = SLOT(delabel);
|
|
|
|
biba_set_effective(mb, MAC_BIBA_TYPE_HIGH, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_devfs_create_symlink(struct ucred *cred, struct mount *mp,
|
|
struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
|
|
struct label *delabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(delabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_devfs_update(struct mount *mp, struct devfs_dirent *de,
|
|
struct label *delabel, struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(vplabel);
|
|
dest = SLOT(delabel);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_devfs_vnode_associate(struct mount *mp, struct label *mntlabel,
|
|
struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(delabel);
|
|
dest = SLOT(vplabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
|
|
struct label *ifplabel, 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 effective, range, or both.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Relabling network interfaces requires Biba privilege.
|
|
*/
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *p, *i;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mlabel);
|
|
i = SLOT(ifplabel);
|
|
|
|
return (biba_effective_in_range(p, i) ? 0 : EACCES);
|
|
}
|
|
|
|
static void
|
|
biba_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
|
|
{
|
|
char tifname[IFNAMSIZ], *p, *q;
|
|
char tiflist[sizeof(trusted_interfaces)];
|
|
struct mac_biba *dest;
|
|
int len, type;
|
|
|
|
dest = SLOT(ifplabel);
|
|
|
|
if (ifp->if_type == IFT_LOOP || interfaces_equal != 0) {
|
|
type = MAC_BIBA_TYPE_EQUAL;
|
|
goto set;
|
|
}
|
|
|
|
if (trust_all_interfaces) {
|
|
type = MAC_BIBA_TYPE_HIGH;
|
|
goto set;
|
|
}
|
|
|
|
type = MAC_BIBA_TYPE_LOW;
|
|
|
|
if (trusted_interfaces[0] == '\0' ||
|
|
!strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
|
|
goto set;
|
|
|
|
bzero(tiflist, sizeof(tiflist));
|
|
for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
|
|
if(*p != ' ' && *p != '\t')
|
|
*q = *p;
|
|
|
|
for (p = q = tiflist;; p++) {
|
|
if (*p == ',' || *p == '\0') {
|
|
len = p - q;
|
|
if (len < IFNAMSIZ) {
|
|
bzero(tifname, sizeof(tifname));
|
|
bcopy(q, tifname, len);
|
|
if (strcmp(tifname, ifp->if_xname) == 0) {
|
|
type = MAC_BIBA_TYPE_HIGH;
|
|
break;
|
|
}
|
|
} else {
|
|
*p = '\0';
|
|
printf("mac_biba warning: interface name "
|
|
"\"%s\" is too long (must be < %d)\n",
|
|
q, IFNAMSIZ);
|
|
}
|
|
if (*p == '\0')
|
|
break;
|
|
q = p + 1;
|
|
}
|
|
}
|
|
set:
|
|
biba_set_effective(dest, type, 0, NULL);
|
|
biba_set_range(dest, type, 0, NULL, type, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(ifplabel);
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
|
|
struct label *ifplabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(ifplabel);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *p, *i;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mlabel);
|
|
i = SLOT(inplabel);
|
|
|
|
return (biba_equal_effective(p, i) ? 0 : EACCES);
|
|
}
|
|
|
|
static int
|
|
biba_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
|
|
struct label *inplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(inplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (ENOENT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_inpcb_create(struct socket *so, struct label *solabel,
|
|
struct inpcb *inp, struct label *inplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(solabel);
|
|
dest = SLOT(inplabel);
|
|
|
|
SOCK_LOCK(so);
|
|
biba_copy_effective(source, dest);
|
|
SOCK_UNLOCK(so);
|
|
}
|
|
|
|
static void
|
|
biba_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(inplabel);
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_inpcb_sosetlabel(struct socket *so, struct label *solabel,
|
|
struct inpcb *inp, struct label *inplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
SOCK_LOCK_ASSERT(so);
|
|
|
|
source = SLOT(solabel);
|
|
dest = SLOT(inplabel);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
|
|
struct label *q6label)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mlabel);
|
|
dest = SLOT(q6label);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
|
|
struct label *q6label)
|
|
{
|
|
struct mac_biba *a, *b;
|
|
|
|
a = SLOT(q6label);
|
|
b = SLOT(mlabel);
|
|
|
|
return (biba_equal_effective(a, b));
|
|
}
|
|
|
|
static void
|
|
biba_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
|
|
struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(q6label);
|
|
dest = SLOT(mlabel);
|
|
|
|
/* Just use the head, since we require them all to match. */
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
|
|
struct label *q6label)
|
|
{
|
|
|
|
/* NOOP: we only accept matching labels, so no need to update */
|
|
}
|
|
|
|
static void
|
|
biba_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
|
|
struct label *qlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mlabel);
|
|
dest = SLOT(qlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
|
|
struct label *qlabel)
|
|
{
|
|
struct mac_biba *a, *b;
|
|
|
|
a = SLOT(qlabel);
|
|
b = SLOT(mlabel);
|
|
|
|
return (biba_equal_effective(a, b));
|
|
}
|
|
|
|
static void
|
|
biba_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
|
|
struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(qlabel);
|
|
dest = SLOT(mlabel);
|
|
|
|
/* Just use the head, since we require them all to match. */
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
|
|
struct label *qlabel)
|
|
{
|
|
|
|
/* NOOP: we only accept matching labels, so no need to update */
|
|
}
|
|
|
|
static int
|
|
biba_kld_check_load(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
obj = SLOT(vplabel);
|
|
if (!biba_high_effective(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_mount_check_stat(struct ucred *cred, struct mount *mp,
|
|
struct label *mplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(mplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_mount_create(struct ucred *cred, struct mount *mp,
|
|
struct label *mplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(mplabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
|
|
struct mbuf *msend, struct label *msendlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mrecvlabel);
|
|
dest = SLOT(msendlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(mlabel);
|
|
|
|
/* XXX: where is the label for the firewall really coming from? */
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_netinet_fragment(struct mbuf *m, struct label *mlabel,
|
|
struct mbuf *frag, struct label *fraglabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mlabel);
|
|
dest = SLOT(fraglabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
|
|
struct mbuf *msend, struct label *msendlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mrecvlabel);
|
|
dest = SLOT(msendlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static void
|
|
biba_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *dest;
|
|
|
|
dest = SLOT(mlabel);
|
|
|
|
biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
|
|
}
|
|
|
|
static int
|
|
biba_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
|
|
{
|
|
|
|
if(!biba_enabled)
|
|
return (0);
|
|
|
|
/* XXX: This will be implemented soon... */
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_pipe_check_poll(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(pplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_pipe_check_read(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(pplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *subj, *obj, *new;
|
|
int error;
|
|
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(pplabel);
|
|
|
|
/*
|
|
* If there is a Biba label update for a pipe, it must be a effective
|
|
* update.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To perform a relabel of a pipe (Biba label or not), Biba must
|
|
* authorize the relabel.
|
|
*/
|
|
if (!biba_effective_in_range(obj, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
|
|
/*
|
|
* To change the Biba label on a pipe, the new pipe label
|
|
* must be in the subject range.
|
|
*/
|
|
if (!biba_effective_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the Biba label on a pipe to be EQUAL, the
|
|
* subject must have appropriate privilege.
|
|
*/
|
|
if (biba_contains_equal(new)) {
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_pipe_check_stat(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(pplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_pipe_check_write(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(pplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_pipe_create(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(pplabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_pipe_relabel(struct ucred *cred, struct pipepair *pp,
|
|
struct label *pplabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(pplabel);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_posixsem_check_openunlink(struct ucred *cred, struct ksem *ks,
|
|
struct label *kslabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(kslabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixsem_check_setmode(struct ucred *cred, struct ksem *ks,
|
|
struct label *kslabel, mode_t mode)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(kslabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixsem_check_setowner(struct ucred *cred, struct ksem *ks,
|
|
struct label *kslabel, uid_t uid, gid_t gid)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(kslabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixsem_check_write(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct ksem *ks, struct label *kslabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(kslabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixsem_check_rdonly(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct ksem *ks, struct label *kslabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(kslabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_posixsem_create(struct ucred *cred, struct ksem *ks,
|
|
struct label *kslabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(kslabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd,
|
|
struct label *shmlabel, int prot, int flags)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd,
|
|
struct label *shmlabel, accmode_t accmode)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
if (accmode & VMODIFY_PERMS) {
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_setmode(struct ucred *cred, struct shmfd *shmfd,
|
|
struct label *shmlabel, mode_t mode)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_setowner(struct ucred *cred, struct shmfd *shmfd,
|
|
struct label *shmlabel, uid_t uid, gid_t gid)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_stat(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct shmfd *shmfd, struct label *shmlabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_truncate(struct ucred *active_cred,
|
|
struct ucred *file_cred, struct shmfd *shmfd, struct label *shmlabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd,
|
|
struct label *shmlabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmlabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_posixshm_create(struct ucred *cred, struct shmfd *shmfd,
|
|
struct label *shmlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(shmlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
/*
|
|
* Some system privileges are allowed regardless of integrity grade; others
|
|
* are allowed only when running with privilege with respect to the Biba
|
|
* policy as they might otherwise allow bypassing of the integrity policy.
|
|
*/
|
|
static int
|
|
biba_priv_check(struct ucred *cred, int priv)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
/*
|
|
* Exempt only specific privileges from the Biba integrity policy.
|
|
*/
|
|
switch (priv) {
|
|
case PRIV_KTRACE:
|
|
case PRIV_MSGBUF:
|
|
|
|
/*
|
|
* Allow processes to manipulate basic process audit properties, and
|
|
* to submit audit records.
|
|
*/
|
|
case PRIV_AUDIT_GETAUDIT:
|
|
case PRIV_AUDIT_SETAUDIT:
|
|
case PRIV_AUDIT_SUBMIT:
|
|
|
|
/*
|
|
* Allow processes to manipulate their regular UNIX credentials.
|
|
*/
|
|
case PRIV_CRED_SETUID:
|
|
case PRIV_CRED_SETEUID:
|
|
case PRIV_CRED_SETGID:
|
|
case PRIV_CRED_SETEGID:
|
|
case PRIV_CRED_SETGROUPS:
|
|
case PRIV_CRED_SETREUID:
|
|
case PRIV_CRED_SETREGID:
|
|
case PRIV_CRED_SETRESUID:
|
|
case PRIV_CRED_SETRESGID:
|
|
|
|
/*
|
|
* Allow processes to perform system monitoring.
|
|
*/
|
|
case PRIV_SEEOTHERGIDS:
|
|
case PRIV_SEEOTHERUIDS:
|
|
break;
|
|
|
|
/*
|
|
* Allow access to general process debugging facilities. We
|
|
* separately control debugging based on MAC label.
|
|
*/
|
|
case PRIV_DEBUG_DIFFCRED:
|
|
case PRIV_DEBUG_SUGID:
|
|
case PRIV_DEBUG_UNPRIV:
|
|
|
|
/*
|
|
* Allow manipulating jails.
|
|
*/
|
|
case PRIV_JAIL_ATTACH:
|
|
|
|
/*
|
|
* Allow privilege with respect to the Partition policy, but not the
|
|
* Privs policy.
|
|
*/
|
|
case PRIV_MAC_PARTITION:
|
|
|
|
/*
|
|
* Allow privilege with respect to process resource limits and login
|
|
* context.
|
|
*/
|
|
case PRIV_PROC_LIMIT:
|
|
case PRIV_PROC_SETLOGIN:
|
|
case PRIV_PROC_SETRLIMIT:
|
|
|
|
/*
|
|
* Allow System V and POSIX IPC privileges.
|
|
*/
|
|
case PRIV_IPC_READ:
|
|
case PRIV_IPC_WRITE:
|
|
case PRIV_IPC_ADMIN:
|
|
case PRIV_IPC_MSGSIZE:
|
|
case PRIV_MQ_ADMIN:
|
|
|
|
/*
|
|
* Allow certain scheduler manipulations -- possibly this should be
|
|
* controlled by more fine-grained policy, as potentially low
|
|
* integrity processes can deny CPU to higher integrity ones.
|
|
*/
|
|
case PRIV_SCHED_DIFFCRED:
|
|
case PRIV_SCHED_SETPRIORITY:
|
|
case PRIV_SCHED_RTPRIO:
|
|
case PRIV_SCHED_SETPOLICY:
|
|
case PRIV_SCHED_SET:
|
|
case PRIV_SCHED_SETPARAM:
|
|
|
|
/*
|
|
* More IPC privileges.
|
|
*/
|
|
case PRIV_SEM_WRITE:
|
|
|
|
/*
|
|
* Allow signaling privileges subject to integrity policy.
|
|
*/
|
|
case PRIV_SIGNAL_DIFFCRED:
|
|
case PRIV_SIGNAL_SUGID:
|
|
|
|
/*
|
|
* Allow access to only limited sysctls from lower integrity levels;
|
|
* piggy-back on the Jail definition.
|
|
*/
|
|
case PRIV_SYSCTL_WRITEJAIL:
|
|
|
|
/*
|
|
* Allow TTY-based privileges, subject to general device access using
|
|
* labels on TTY device nodes, but not console privilege.
|
|
*/
|
|
case PRIV_TTY_DRAINWAIT:
|
|
case PRIV_TTY_DTRWAIT:
|
|
case PRIV_TTY_EXCLUSIVE:
|
|
case PRIV_TTY_STI:
|
|
case PRIV_TTY_SETA:
|
|
|
|
/*
|
|
* Grant most VFS privileges, as almost all are in practice bounded
|
|
* by more specific checks using labels.
|
|
*/
|
|
case PRIV_VFS_READ:
|
|
case PRIV_VFS_WRITE:
|
|
case PRIV_VFS_ADMIN:
|
|
case PRIV_VFS_EXEC:
|
|
case PRIV_VFS_LOOKUP:
|
|
case PRIV_VFS_CHFLAGS_DEV:
|
|
case PRIV_VFS_CHOWN:
|
|
case PRIV_VFS_CHROOT:
|
|
case PRIV_VFS_RETAINSUGID:
|
|
case PRIV_VFS_EXCEEDQUOTA:
|
|
case PRIV_VFS_FCHROOT:
|
|
case PRIV_VFS_FHOPEN:
|
|
case PRIV_VFS_FHSTATFS:
|
|
case PRIV_VFS_GENERATION:
|
|
case PRIV_VFS_GETFH:
|
|
case PRIV_VFS_GETQUOTA:
|
|
case PRIV_VFS_LINK:
|
|
case PRIV_VFS_MOUNT:
|
|
case PRIV_VFS_MOUNT_OWNER:
|
|
case PRIV_VFS_MOUNT_PERM:
|
|
case PRIV_VFS_MOUNT_SUIDDIR:
|
|
case PRIV_VFS_MOUNT_NONUSER:
|
|
case PRIV_VFS_SETGID:
|
|
case PRIV_VFS_STICKYFILE:
|
|
case PRIV_VFS_SYSFLAGS:
|
|
case PRIV_VFS_UNMOUNT:
|
|
|
|
/*
|
|
* Allow VM privileges; it would be nice if these were subject to
|
|
* resource limits.
|
|
*/
|
|
case PRIV_VM_MADV_PROTECT:
|
|
case PRIV_VM_MLOCK:
|
|
case PRIV_VM_MUNLOCK:
|
|
case PRIV_VM_SWAP_NOQUOTA:
|
|
case PRIV_VM_SWAP_NORLIMIT:
|
|
|
|
/*
|
|
* Allow some but not all network privileges. In general, dont allow
|
|
* reconfiguring the network stack, just normal use.
|
|
*/
|
|
case PRIV_NETATALK_RESERVEDPORT:
|
|
case PRIV_NETINET_RESERVEDPORT:
|
|
case PRIV_NETINET_RAW:
|
|
case PRIV_NETINET_REUSEPORT:
|
|
case PRIV_NETIPX_RESERVEDPORT:
|
|
case PRIV_NETIPX_RAW:
|
|
break;
|
|
|
|
/*
|
|
* All remaining system privileges are allow only if the process
|
|
* holds privilege with respect to the Biba policy.
|
|
*/
|
|
default:
|
|
subj = SLOT(cred->cr_label);
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_proc_check_debug(struct ucred *cred, struct proc *p)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(p->p_ucred->cr_label);
|
|
|
|
/* XXX: range checks */
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (ESRCH);
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_proc_check_sched(struct ucred *cred, struct proc *p)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(p->p_ucred->cr_label);
|
|
|
|
/* XXX: range checks */
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (ESRCH);
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(p->p_ucred->cr_label);
|
|
|
|
/* XXX: range checks */
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (ESRCH);
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_socket_check_deliver(struct socket *so, struct label *solabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *p, *s;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
p = SLOT(mlabel);
|
|
s = SLOT(solabel);
|
|
|
|
SOCK_LOCK(so);
|
|
error = biba_equal_effective(p, s) ? 0 : EACCES;
|
|
SOCK_UNLOCK(so);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
biba_socket_check_relabel(struct ucred *cred, struct socket *so,
|
|
struct label *solabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *subj, *obj, *new;
|
|
int error;
|
|
|
|
SOCK_LOCK_ASSERT(so);
|
|
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(solabel);
|
|
|
|
/*
|
|
* If there is a Biba label update for the socket, it may be an
|
|
* update of effective.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To relabel a socket, the old socket effective must be in the
|
|
* subject range.
|
|
*/
|
|
if (!biba_effective_in_range(obj, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
|
|
/*
|
|
* To relabel a socket, the new socket effective must be in
|
|
* the subject range.
|
|
*/
|
|
if (!biba_effective_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the Biba label on the socket to contain EQUAL,
|
|
* the subject must have appropriate privilege.
|
|
*/
|
|
if (biba_contains_equal(new)) {
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_socket_check_visible(struct ucred *cred, struct socket *so,
|
|
struct label *solabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(solabel);
|
|
|
|
SOCK_LOCK(so);
|
|
if (!biba_dominate_effective(obj, subj)) {
|
|
SOCK_UNLOCK(so);
|
|
return (ENOENT);
|
|
}
|
|
SOCK_UNLOCK(so);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_socket_create(struct ucred *cred, struct socket *so,
|
|
struct label *solabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(solabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_socket_create_mbuf(struct socket *so, struct label *solabel,
|
|
struct mbuf *m, struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(solabel);
|
|
dest = SLOT(mlabel);
|
|
|
|
SOCK_LOCK(so);
|
|
biba_copy_effective(source, dest);
|
|
SOCK_UNLOCK(so);
|
|
}
|
|
|
|
static void
|
|
biba_socket_newconn(struct socket *oldso, struct label *oldsolabel,
|
|
struct socket *newso, struct label *newsolabel)
|
|
{
|
|
struct mac_biba source, *dest;
|
|
|
|
SOCK_LOCK(oldso);
|
|
source = *SLOT(oldsolabel);
|
|
SOCK_UNLOCK(oldso);
|
|
|
|
dest = SLOT(newsolabel);
|
|
|
|
SOCK_LOCK(newso);
|
|
biba_copy_effective(&source, dest);
|
|
SOCK_UNLOCK(newso);
|
|
}
|
|
|
|
static void
|
|
biba_socket_relabel(struct ucred *cred, struct socket *so,
|
|
struct label *solabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
SOCK_LOCK_ASSERT(so);
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(solabel);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
|
|
struct socket *so, struct label *sopeerlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mlabel);
|
|
dest = SLOT(sopeerlabel);
|
|
|
|
SOCK_LOCK(so);
|
|
biba_copy_effective(source, dest);
|
|
SOCK_UNLOCK(so);
|
|
}
|
|
|
|
static void
|
|
biba_socketpeer_set_from_socket(struct socket *oldso,
|
|
struct label *oldsolabel, struct socket *newso,
|
|
struct label *newsopeerlabel)
|
|
{
|
|
struct mac_biba source, *dest;
|
|
|
|
SOCK_LOCK(oldso);
|
|
source = *SLOT(oldsolabel);
|
|
SOCK_UNLOCK(oldso);
|
|
dest = SLOT(newsopeerlabel);
|
|
|
|
SOCK_LOCK(newso);
|
|
biba_copy_effective(&source, dest);
|
|
SOCK_UNLOCK(newso);
|
|
}
|
|
|
|
static void
|
|
biba_syncache_create(struct label *label, struct inpcb *inp)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(inp->inp_label);
|
|
dest = SLOT(label);
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static void
|
|
biba_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
|
|
struct label *mlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(sc_label);
|
|
dest = SLOT(mlabel);
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_system_check_acct(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (vplabel == NULL)
|
|
return (0);
|
|
|
|
obj = SLOT(vplabel);
|
|
if (!biba_high_effective(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_system_check_auditctl(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (vplabel == NULL)
|
|
return (0);
|
|
|
|
obj = SLOT(vplabel);
|
|
if (!biba_high_effective(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_system_check_auditon(struct ucred *cred, int cmd)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_system_check_swapoff(struct ucred *cred, struct vnode *vp,
|
|
struct label *label)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_system_check_swapon(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (!biba_high_effective(obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
|
|
void *arg1, int arg2, struct sysctl_req *req)
|
|
{
|
|
struct mac_biba *subj;
|
|
int error;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
/*
|
|
* Treat sysctl variables without CTLFLAG_ANYBODY flag as biba/high,
|
|
* but also require privilege to change them.
|
|
*/
|
|
if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
|
|
if (!biba_subject_dominate_high(subj))
|
|
return (EACCES);
|
|
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_sysvmsg_cleanup(struct label *msglabel)
|
|
{
|
|
|
|
bzero(SLOT(msglabel), sizeof(struct mac_biba));
|
|
}
|
|
|
|
static void
|
|
biba_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
|
|
struct label *msqlabel, struct msg *msgptr, struct label *msglabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
/* Ignore the msgq label */
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(msglabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr,
|
|
struct label *msglabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(msglabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr,
|
|
struct label *msglabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(msglabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr,
|
|
struct label *msqklabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(msqklabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr,
|
|
struct label *msqklabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(msqklabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr,
|
|
struct label *msqklabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(msqklabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
|
|
struct label *msqklabel, int cmd)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(msqklabel);
|
|
|
|
switch(cmd) {
|
|
case IPC_RMID:
|
|
case IPC_SET:
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
break;
|
|
|
|
case IPC_STAT:
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
break;
|
|
|
|
default:
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_sysvmsq_cleanup(struct label *msqlabel)
|
|
{
|
|
|
|
bzero(SLOT(msqlabel), sizeof(struct mac_biba));
|
|
}
|
|
|
|
static void
|
|
biba_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr,
|
|
struct label *msqlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(msqlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr,
|
|
struct label *semaklabel, int cmd)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(semaklabel);
|
|
|
|
switch(cmd) {
|
|
case IPC_RMID:
|
|
case IPC_SET:
|
|
case SETVAL:
|
|
case SETALL:
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
break;
|
|
|
|
case IPC_STAT:
|
|
case GETVAL:
|
|
case GETPID:
|
|
case GETNCNT:
|
|
case GETZCNT:
|
|
case GETALL:
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
break;
|
|
|
|
default:
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr,
|
|
struct label *semaklabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(semaklabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr,
|
|
struct label *semaklabel, size_t accesstype)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(semaklabel);
|
|
|
|
if (accesstype & SEM_R)
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
if (accesstype & SEM_A)
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_sysvsem_cleanup(struct label *semalabel)
|
|
{
|
|
|
|
bzero(SLOT(semalabel), sizeof(struct mac_biba));
|
|
}
|
|
|
|
static void
|
|
biba_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr,
|
|
struct label *semalabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(semalabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
|
|
struct label *shmseglabel, int shmflg)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmseglabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
if ((shmflg & SHM_RDONLY) == 0) {
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
|
|
struct label *shmseglabel, int cmd)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmseglabel);
|
|
|
|
switch(cmd) {
|
|
case IPC_RMID:
|
|
case IPC_SET:
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
break;
|
|
|
|
case IPC_STAT:
|
|
case SHM_STAT:
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
break;
|
|
|
|
default:
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
|
|
struct label *shmseglabel, int shmflg)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(shmseglabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_sysvshm_cleanup(struct label *shmlabel)
|
|
{
|
|
|
|
bzero(SLOT(shmlabel), sizeof(struct mac_biba));
|
|
}
|
|
|
|
static void
|
|
biba_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr,
|
|
struct label *shmlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(shmlabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
|
|
struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba mb_temp, *source, *dest;
|
|
int buflen, error;
|
|
|
|
source = SLOT(mplabel);
|
|
dest = SLOT(vplabel);
|
|
|
|
buflen = sizeof(mb_temp);
|
|
bzero(&mb_temp, buflen);
|
|
|
|
error = vn_extattr_get(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
|
|
MAC_BIBA_EXTATTR_NAME, &buflen, (char *) &mb_temp, curthread);
|
|
if (error == ENOATTR || error == EOPNOTSUPP) {
|
|
/* Fall back to the mntlabel. */
|
|
biba_copy_effective(source, dest);
|
|
return (0);
|
|
} else if (error)
|
|
return (error);
|
|
|
|
if (buflen != sizeof(mb_temp)) {
|
|
printf("biba_vnode_associate_extattr: bad size %d\n",
|
|
buflen);
|
|
return (EPERM);
|
|
}
|
|
if (biba_valid(&mb_temp) != 0) {
|
|
printf("biba_vnode_associate_extattr: invalid\n");
|
|
return (EPERM);
|
|
}
|
|
if ((mb_temp.mb_flags & MAC_BIBA_FLAGS_BOTH) !=
|
|
MAC_BIBA_FLAG_EFFECTIVE) {
|
|
printf("biba_vnode_associate_extattr: not effective\n");
|
|
return (EPERM);
|
|
}
|
|
|
|
biba_copy_effective(&mb_temp, dest);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
biba_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
|
|
struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(mplabel);
|
|
dest = SLOT(vplabel);
|
|
|
|
biba_copy_effective(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_create(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, acl_type_t type)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, int attrnamespace, const char *name)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_exec(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, struct image_params *imgp,
|
|
struct label *execlabel)
|
|
{
|
|
struct mac_biba *subj, *obj, *exec;
|
|
int error;
|
|
|
|
if (execlabel != NULL) {
|
|
/*
|
|
* We currently don't permit labels to be changed at
|
|
* exec-time as part of Biba, so disallow non-NULL Biba label
|
|
* elements in the execlabel.
|
|
*/
|
|
exec = SLOT(execlabel);
|
|
error = biba_atmostflags(exec, 0);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, acl_type_t type)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, int attrnamespace, const char *name)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_link(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel, struct vnode *vp, struct label *vplabel,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, int attrnamespace)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel, struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, int prot, int flags)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
/*
|
|
* Rely on the use of open()-time protections to handle
|
|
* non-revocation cases.
|
|
*/
|
|
if (!biba_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_open(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, accmode_t accmode)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
/* XXX privilege override for admin? */
|
|
if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
}
|
|
if (accmode & VMODIFY_PERMS) {
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_readlink(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *old, *new, *subj;
|
|
int error;
|
|
|
|
old = SLOT(vplabel);
|
|
new = SLOT(newlabel);
|
|
subj = SLOT(cred->cr_label);
|
|
|
|
/*
|
|
* If there is a Biba label update for the vnode, it must be a
|
|
* effective label.
|
|
*/
|
|
error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* To perform a relabel of the vnode (Biba label or not), Biba must
|
|
* authorize the relabel.
|
|
*/
|
|
if (!biba_effective_in_range(old, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* If the Biba label is to be changed, authorize as appropriate.
|
|
*/
|
|
if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
|
|
/*
|
|
* To change the Biba label on a vnode, the new vnode label
|
|
* must be in the subject range.
|
|
*/
|
|
if (!biba_effective_in_range(new, subj))
|
|
return (EPERM);
|
|
|
|
/*
|
|
* To change the Biba label on the vnode to be EQUAL, the
|
|
* subject must have appropriate privilege.
|
|
*/
|
|
if (biba_contains_equal(new)) {
|
|
error = biba_subject_privileged(subj);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel, struct vnode *vp, struct label *vplabel,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel, struct vnode *vp, struct label *vplabel,
|
|
int samedir, struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
if (vp != NULL) {
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, acl_type_t type, struct acl *acl)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, int attrnamespace, const char *name)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
/* XXX: protect the MAC EA in a special way? */
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, u_long flags)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, mode_t mode)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, uid_t uid, gid_t gid)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, struct timespec atime, struct timespec mtime)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(obj, subj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
|
|
struct label *dvplabel, struct vnode *vp, struct label *vplabel,
|
|
struct componentname *cnp)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(cred->cr_label);
|
|
obj = SLOT(dvplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_check_write(struct ucred *active_cred,
|
|
struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
|
|
{
|
|
struct mac_biba *subj, *obj;
|
|
|
|
if (!biba_enabled || !revocation_enabled)
|
|
return (0);
|
|
|
|
subj = SLOT(active_cred->cr_label);
|
|
obj = SLOT(vplabel);
|
|
|
|
if (!biba_dominate_effective(subj, obj))
|
|
return (EACCES);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_create_extattr(struct ucred *cred, struct mount *mp,
|
|
struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
|
|
struct vnode *vp, struct label *vplabel, struct componentname *cnp)
|
|
{
|
|
struct mac_biba *source, *dest, mb_temp;
|
|
size_t buflen;
|
|
int error;
|
|
|
|
buflen = sizeof(mb_temp);
|
|
bzero(&mb_temp, buflen);
|
|
|
|
source = SLOT(cred->cr_label);
|
|
dest = SLOT(vplabel);
|
|
biba_copy_effective(source, &mb_temp);
|
|
|
|
error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
|
|
MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
|
|
if (error == 0)
|
|
biba_copy_effective(source, dest);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
biba_vnode_relabel(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, struct label *newlabel)
|
|
{
|
|
struct mac_biba *source, *dest;
|
|
|
|
source = SLOT(newlabel);
|
|
dest = SLOT(vplabel);
|
|
|
|
biba_copy(source, dest);
|
|
}
|
|
|
|
static int
|
|
biba_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *vplabel, struct label *intlabel)
|
|
{
|
|
struct mac_biba *source, mb_temp;
|
|
size_t buflen;
|
|
int error;
|
|
|
|
buflen = sizeof(mb_temp);
|
|
bzero(&mb_temp, buflen);
|
|
|
|
source = SLOT(intlabel);
|
|
if ((source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) == 0)
|
|
return (0);
|
|
|
|
biba_copy_effective(source, &mb_temp);
|
|
|
|
error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
|
|
MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
|
|
return (error);
|
|
}
|
|
|
|
static struct mac_policy_ops mac_biba_ops =
|
|
{
|
|
.mpo_init = biba_init,
|
|
|
|
.mpo_bpfdesc_check_receive = biba_bpfdesc_check_receive,
|
|
.mpo_bpfdesc_create = biba_bpfdesc_create,
|
|
.mpo_bpfdesc_create_mbuf = biba_bpfdesc_create_mbuf,
|
|
.mpo_bpfdesc_destroy_label = biba_destroy_label,
|
|
.mpo_bpfdesc_init_label = biba_init_label,
|
|
|
|
.mpo_cred_associate_nfsd = biba_cred_associate_nfsd,
|
|
.mpo_cred_check_relabel = biba_cred_check_relabel,
|
|
.mpo_cred_check_visible = biba_cred_check_visible,
|
|
.mpo_cred_copy_label = biba_copy_label,
|
|
.mpo_cred_create_init = biba_cred_create_init,
|
|
.mpo_cred_create_swapper = biba_cred_create_swapper,
|
|
.mpo_cred_destroy_label = biba_destroy_label,
|
|
.mpo_cred_externalize_label = biba_externalize_label,
|
|
.mpo_cred_init_label = biba_init_label,
|
|
.mpo_cred_internalize_label = biba_internalize_label,
|
|
.mpo_cred_relabel = biba_cred_relabel,
|
|
|
|
.mpo_devfs_create_device = biba_devfs_create_device,
|
|
.mpo_devfs_create_directory = biba_devfs_create_directory,
|
|
.mpo_devfs_create_symlink = biba_devfs_create_symlink,
|
|
.mpo_devfs_destroy_label = biba_destroy_label,
|
|
.mpo_devfs_init_label = biba_init_label,
|
|
.mpo_devfs_update = biba_devfs_update,
|
|
.mpo_devfs_vnode_associate = biba_devfs_vnode_associate,
|
|
|
|
.mpo_ifnet_check_relabel = biba_ifnet_check_relabel,
|
|
.mpo_ifnet_check_transmit = biba_ifnet_check_transmit,
|
|
.mpo_ifnet_copy_label = biba_copy_label,
|
|
.mpo_ifnet_create = biba_ifnet_create,
|
|
.mpo_ifnet_create_mbuf = biba_ifnet_create_mbuf,
|
|
.mpo_ifnet_destroy_label = biba_destroy_label,
|
|
.mpo_ifnet_externalize_label = biba_externalize_label,
|
|
.mpo_ifnet_init_label = biba_init_label,
|
|
.mpo_ifnet_internalize_label = biba_internalize_label,
|
|
.mpo_ifnet_relabel = biba_ifnet_relabel,
|
|
|
|
.mpo_inpcb_check_deliver = biba_inpcb_check_deliver,
|
|
.mpo_inpcb_check_visible = biba_inpcb_check_visible,
|
|
.mpo_inpcb_create = biba_inpcb_create,
|
|
.mpo_inpcb_create_mbuf = biba_inpcb_create_mbuf,
|
|
.mpo_inpcb_destroy_label = biba_destroy_label,
|
|
.mpo_inpcb_init_label = biba_init_label_waitcheck,
|
|
.mpo_inpcb_sosetlabel = biba_inpcb_sosetlabel,
|
|
|
|
.mpo_ip6q_create = biba_ip6q_create,
|
|
.mpo_ip6q_destroy_label = biba_destroy_label,
|
|
.mpo_ip6q_init_label = biba_init_label_waitcheck,
|
|
.mpo_ip6q_match = biba_ip6q_match,
|
|
.mpo_ip6q_reassemble = biba_ip6q_reassemble,
|
|
.mpo_ip6q_update = biba_ip6q_update,
|
|
|
|
.mpo_ipq_create = biba_ipq_create,
|
|
.mpo_ipq_destroy_label = biba_destroy_label,
|
|
.mpo_ipq_init_label = biba_init_label_waitcheck,
|
|
.mpo_ipq_match = biba_ipq_match,
|
|
.mpo_ipq_reassemble = biba_ipq_reassemble,
|
|
.mpo_ipq_update = biba_ipq_update,
|
|
|
|
.mpo_kld_check_load = biba_kld_check_load,
|
|
|
|
.mpo_mbuf_copy_label = biba_copy_label,
|
|
.mpo_mbuf_destroy_label = biba_destroy_label,
|
|
.mpo_mbuf_init_label = biba_init_label_waitcheck,
|
|
|
|
.mpo_mount_check_stat = biba_mount_check_stat,
|
|
.mpo_mount_create = biba_mount_create,
|
|
.mpo_mount_destroy_label = biba_destroy_label,
|
|
.mpo_mount_init_label = biba_init_label,
|
|
|
|
.mpo_netatalk_aarp_send = biba_netatalk_aarp_send,
|
|
|
|
.mpo_netinet_arp_send = biba_netinet_arp_send,
|
|
.mpo_netinet_firewall_reply = biba_netinet_firewall_reply,
|
|
.mpo_netinet_firewall_send = biba_netinet_firewall_send,
|
|
.mpo_netinet_fragment = biba_netinet_fragment,
|
|
.mpo_netinet_icmp_reply = biba_netinet_icmp_reply,
|
|
.mpo_netinet_igmp_send = biba_netinet_igmp_send,
|
|
|
|
.mpo_netinet6_nd6_send = biba_netinet6_nd6_send,
|
|
|
|
.mpo_pipe_check_ioctl = biba_pipe_check_ioctl,
|
|
.mpo_pipe_check_poll = biba_pipe_check_poll,
|
|
.mpo_pipe_check_read = biba_pipe_check_read,
|
|
.mpo_pipe_check_relabel = biba_pipe_check_relabel,
|
|
.mpo_pipe_check_stat = biba_pipe_check_stat,
|
|
.mpo_pipe_check_write = biba_pipe_check_write,
|
|
.mpo_pipe_copy_label = biba_copy_label,
|
|
.mpo_pipe_create = biba_pipe_create,
|
|
.mpo_pipe_destroy_label = biba_destroy_label,
|
|
.mpo_pipe_externalize_label = biba_externalize_label,
|
|
.mpo_pipe_init_label = biba_init_label,
|
|
.mpo_pipe_internalize_label = biba_internalize_label,
|
|
.mpo_pipe_relabel = biba_pipe_relabel,
|
|
|
|
.mpo_posixsem_check_getvalue = biba_posixsem_check_rdonly,
|
|
.mpo_posixsem_check_open = biba_posixsem_check_openunlink,
|
|
.mpo_posixsem_check_post = biba_posixsem_check_write,
|
|
.mpo_posixsem_check_setmode = biba_posixsem_check_setmode,
|
|
.mpo_posixsem_check_setowner = biba_posixsem_check_setowner,
|
|
.mpo_posixsem_check_stat = biba_posixsem_check_rdonly,
|
|
.mpo_posixsem_check_unlink = biba_posixsem_check_openunlink,
|
|
.mpo_posixsem_check_wait = biba_posixsem_check_write,
|
|
.mpo_posixsem_create = biba_posixsem_create,
|
|
.mpo_posixsem_destroy_label = biba_destroy_label,
|
|
.mpo_posixsem_init_label = biba_init_label,
|
|
|
|
.mpo_posixshm_check_mmap = biba_posixshm_check_mmap,
|
|
.mpo_posixshm_check_open = biba_posixshm_check_open,
|
|
.mpo_posixshm_check_setmode = biba_posixshm_check_setmode,
|
|
.mpo_posixshm_check_setowner = biba_posixshm_check_setowner,
|
|
.mpo_posixshm_check_stat = biba_posixshm_check_stat,
|
|
.mpo_posixshm_check_truncate = biba_posixshm_check_truncate,
|
|
.mpo_posixshm_check_unlink = biba_posixshm_check_unlink,
|
|
.mpo_posixshm_create = biba_posixshm_create,
|
|
.mpo_posixshm_destroy_label = biba_destroy_label,
|
|
.mpo_posixshm_init_label = biba_init_label,
|
|
|
|
.mpo_priv_check = biba_priv_check,
|
|
|
|
.mpo_proc_check_debug = biba_proc_check_debug,
|
|
.mpo_proc_check_sched = biba_proc_check_sched,
|
|
.mpo_proc_check_signal = biba_proc_check_signal,
|
|
|
|
.mpo_socket_check_deliver = biba_socket_check_deliver,
|
|
.mpo_socket_check_relabel = biba_socket_check_relabel,
|
|
.mpo_socket_check_visible = biba_socket_check_visible,
|
|
.mpo_socket_copy_label = biba_copy_label,
|
|
.mpo_socket_create = biba_socket_create,
|
|
.mpo_socket_create_mbuf = biba_socket_create_mbuf,
|
|
.mpo_socket_destroy_label = biba_destroy_label,
|
|
.mpo_socket_externalize_label = biba_externalize_label,
|
|
.mpo_socket_init_label = biba_init_label_waitcheck,
|
|
.mpo_socket_internalize_label = biba_internalize_label,
|
|
.mpo_socket_newconn = biba_socket_newconn,
|
|
.mpo_socket_relabel = biba_socket_relabel,
|
|
|
|
.mpo_socketpeer_destroy_label = biba_destroy_label,
|
|
.mpo_socketpeer_externalize_label = biba_externalize_label,
|
|
.mpo_socketpeer_init_label = biba_init_label_waitcheck,
|
|
.mpo_socketpeer_set_from_mbuf = biba_socketpeer_set_from_mbuf,
|
|
.mpo_socketpeer_set_from_socket = biba_socketpeer_set_from_socket,
|
|
|
|
.mpo_syncache_create = biba_syncache_create,
|
|
.mpo_syncache_create_mbuf = biba_syncache_create_mbuf,
|
|
.mpo_syncache_destroy_label = biba_destroy_label,
|
|
.mpo_syncache_init_label = biba_init_label_waitcheck,
|
|
|
|
.mpo_system_check_acct = biba_system_check_acct,
|
|
.mpo_system_check_auditctl = biba_system_check_auditctl,
|
|
.mpo_system_check_auditon = biba_system_check_auditon,
|
|
.mpo_system_check_swapoff = biba_system_check_swapoff,
|
|
.mpo_system_check_swapon = biba_system_check_swapon,
|
|
.mpo_system_check_sysctl = biba_system_check_sysctl,
|
|
|
|
.mpo_sysvmsg_cleanup = biba_sysvmsg_cleanup,
|
|
.mpo_sysvmsg_create = biba_sysvmsg_create,
|
|
.mpo_sysvmsg_destroy_label = biba_destroy_label,
|
|
.mpo_sysvmsg_init_label = biba_init_label,
|
|
|
|
.mpo_sysvmsq_check_msgrcv = biba_sysvmsq_check_msgrcv,
|
|
.mpo_sysvmsq_check_msgrmid = biba_sysvmsq_check_msgrmid,
|
|
.mpo_sysvmsq_check_msqget = biba_sysvmsq_check_msqget,
|
|
.mpo_sysvmsq_check_msqsnd = biba_sysvmsq_check_msqsnd,
|
|
.mpo_sysvmsq_check_msqrcv = biba_sysvmsq_check_msqrcv,
|
|
.mpo_sysvmsq_check_msqctl = biba_sysvmsq_check_msqctl,
|
|
.mpo_sysvmsq_cleanup = biba_sysvmsq_cleanup,
|
|
.mpo_sysvmsq_create = biba_sysvmsq_create,
|
|
.mpo_sysvmsq_destroy_label = biba_destroy_label,
|
|
.mpo_sysvmsq_init_label = biba_init_label,
|
|
|
|
.mpo_sysvsem_check_semctl = biba_sysvsem_check_semctl,
|
|
.mpo_sysvsem_check_semget = biba_sysvsem_check_semget,
|
|
.mpo_sysvsem_check_semop = biba_sysvsem_check_semop,
|
|
.mpo_sysvsem_cleanup = biba_sysvsem_cleanup,
|
|
.mpo_sysvsem_create = biba_sysvsem_create,
|
|
.mpo_sysvsem_destroy_label = biba_destroy_label,
|
|
.mpo_sysvsem_init_label = biba_init_label,
|
|
|
|
.mpo_sysvshm_check_shmat = biba_sysvshm_check_shmat,
|
|
.mpo_sysvshm_check_shmctl = biba_sysvshm_check_shmctl,
|
|
.mpo_sysvshm_check_shmget = biba_sysvshm_check_shmget,
|
|
.mpo_sysvshm_cleanup = biba_sysvshm_cleanup,
|
|
.mpo_sysvshm_create = biba_sysvshm_create,
|
|
.mpo_sysvshm_destroy_label = biba_destroy_label,
|
|
.mpo_sysvshm_init_label = biba_init_label,
|
|
|
|
.mpo_vnode_associate_extattr = biba_vnode_associate_extattr,
|
|
.mpo_vnode_associate_singlelabel = biba_vnode_associate_singlelabel,
|
|
.mpo_vnode_check_access = biba_vnode_check_open,
|
|
.mpo_vnode_check_chdir = biba_vnode_check_chdir,
|
|
.mpo_vnode_check_chroot = biba_vnode_check_chroot,
|
|
.mpo_vnode_check_create = biba_vnode_check_create,
|
|
.mpo_vnode_check_deleteacl = biba_vnode_check_deleteacl,
|
|
.mpo_vnode_check_deleteextattr = biba_vnode_check_deleteextattr,
|
|
.mpo_vnode_check_exec = biba_vnode_check_exec,
|
|
.mpo_vnode_check_getacl = biba_vnode_check_getacl,
|
|
.mpo_vnode_check_getextattr = biba_vnode_check_getextattr,
|
|
.mpo_vnode_check_link = biba_vnode_check_link,
|
|
.mpo_vnode_check_listextattr = biba_vnode_check_listextattr,
|
|
.mpo_vnode_check_lookup = biba_vnode_check_lookup,
|
|
.mpo_vnode_check_mmap = biba_vnode_check_mmap,
|
|
.mpo_vnode_check_open = biba_vnode_check_open,
|
|
.mpo_vnode_check_poll = biba_vnode_check_poll,
|
|
.mpo_vnode_check_read = biba_vnode_check_read,
|
|
.mpo_vnode_check_readdir = biba_vnode_check_readdir,
|
|
.mpo_vnode_check_readlink = biba_vnode_check_readlink,
|
|
.mpo_vnode_check_relabel = biba_vnode_check_relabel,
|
|
.mpo_vnode_check_rename_from = biba_vnode_check_rename_from,
|
|
.mpo_vnode_check_rename_to = biba_vnode_check_rename_to,
|
|
.mpo_vnode_check_revoke = biba_vnode_check_revoke,
|
|
.mpo_vnode_check_setacl = biba_vnode_check_setacl,
|
|
.mpo_vnode_check_setextattr = biba_vnode_check_setextattr,
|
|
.mpo_vnode_check_setflags = biba_vnode_check_setflags,
|
|
.mpo_vnode_check_setmode = biba_vnode_check_setmode,
|
|
.mpo_vnode_check_setowner = biba_vnode_check_setowner,
|
|
.mpo_vnode_check_setutimes = biba_vnode_check_setutimes,
|
|
.mpo_vnode_check_stat = biba_vnode_check_stat,
|
|
.mpo_vnode_check_unlink = biba_vnode_check_unlink,
|
|
.mpo_vnode_check_write = biba_vnode_check_write,
|
|
.mpo_vnode_create_extattr = biba_vnode_create_extattr,
|
|
.mpo_vnode_copy_label = biba_copy_label,
|
|
.mpo_vnode_destroy_label = biba_destroy_label,
|
|
.mpo_vnode_externalize_label = biba_externalize_label,
|
|
.mpo_vnode_init_label = biba_init_label,
|
|
.mpo_vnode_internalize_label = biba_internalize_label,
|
|
.mpo_vnode_relabel = biba_vnode_relabel,
|
|
.mpo_vnode_setlabel_extattr = biba_vnode_setlabel_extattr,
|
|
};
|
|
|
|
MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
|
|
MPC_LOADTIME_FLAG_NOTLATE, &biba_slot);
|