738f14d4b1
other problems while labels were first being added to various kernel objects. They have outlived their usefulness. MFC after: 1 month Suggested by: Christopher dot Vance at SPARTA dot com Obtained from: TrustedBSD Project
290 lines
6.2 KiB
C
290 lines
6.2 KiB
C
/*-
|
|
* Copyright (c) 1999-2002 Robert N. M. Watson
|
|
* Copyright (c) 2001 Ilmar S. Habibulin
|
|
* Copyright (c) 2001-2004 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Robert Watson and Ilmar Habibulin for the
|
|
* TrustedBSD Project.
|
|
*
|
|
* This software was developed for the FreeBSD Project in part by Network
|
|
* Associates Laboratories, the Security Research Division of Network
|
|
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
|
|
* as part of the DARPA CHATS research program.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/file.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <sys/mac_policy.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_pcb.h>
|
|
#include <netinet/ip_var.h>
|
|
|
|
#include <security/mac/mac_internal.h>
|
|
|
|
static struct label *
|
|
mac_inpcb_label_alloc(int flag)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
label = mac_labelzone_alloc(flag);
|
|
if (label == NULL)
|
|
return (NULL);
|
|
MAC_CHECK(init_inpcb_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_inpcb_label, label);
|
|
mac_labelzone_free(label);
|
|
return (NULL);
|
|
}
|
|
return (label);
|
|
}
|
|
|
|
int
|
|
mac_init_inpcb(struct inpcb *inp, int flag)
|
|
{
|
|
|
|
inp->inp_label = mac_inpcb_label_alloc(flag);
|
|
if (inp->inp_label == NULL)
|
|
return (ENOMEM);
|
|
return (0);
|
|
}
|
|
|
|
static struct label *
|
|
mac_ipq_label_alloc(int flag)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
label = mac_labelzone_alloc(flag);
|
|
if (label == NULL)
|
|
return (NULL);
|
|
|
|
MAC_CHECK(init_ipq_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_ipq_label, label);
|
|
mac_labelzone_free(label);
|
|
return (NULL);
|
|
}
|
|
return (label);
|
|
}
|
|
|
|
int
|
|
mac_init_ipq(struct ipq *ipq, int flag)
|
|
{
|
|
|
|
ipq->ipq_label = mac_ipq_label_alloc(flag);
|
|
if (ipq->ipq_label == NULL)
|
|
return (ENOMEM);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_inpcb_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_inpcb_label, label);
|
|
mac_labelzone_free(label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_inpcb(struct inpcb *inp)
|
|
{
|
|
|
|
mac_inpcb_label_free(inp->inp_label);
|
|
inp->inp_label = NULL;
|
|
}
|
|
|
|
static void
|
|
mac_ipq_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_ipq_label, label);
|
|
mac_labelzone_free(label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_ipq(struct ipq *ipq)
|
|
{
|
|
|
|
mac_ipq_label_free(ipq->ipq_label);
|
|
ipq->ipq_label = NULL;
|
|
}
|
|
|
|
void
|
|
mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp)
|
|
{
|
|
|
|
MAC_PERFORM(create_inpcb_from_socket, so, so->so_label, inp,
|
|
inp->inp_label);
|
|
}
|
|
|
|
void
|
|
mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_mbuf_to_label(datagram);
|
|
|
|
MAC_PERFORM(create_datagram_from_ipq, ipq, ipq->ipq_label,
|
|
datagram, label);
|
|
}
|
|
|
|
void
|
|
mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment)
|
|
{
|
|
struct label *datagramlabel, *fragmentlabel;
|
|
|
|
datagramlabel = mac_mbuf_to_label(datagram);
|
|
fragmentlabel = mac_mbuf_to_label(fragment);
|
|
|
|
MAC_PERFORM(create_fragment, datagram, datagramlabel, fragment,
|
|
fragmentlabel);
|
|
}
|
|
|
|
void
|
|
mac_create_ipq(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_mbuf_to_label(fragment);
|
|
|
|
MAC_PERFORM(create_ipq, fragment, label, ipq, ipq->ipq_label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_inpcb(struct inpcb *inp, struct mbuf *m)
|
|
{
|
|
struct label *mlabel;
|
|
|
|
INP_LOCK_ASSERT(inp);
|
|
mlabel = mac_mbuf_to_label(m);
|
|
|
|
MAC_PERFORM(create_mbuf_from_inpcb, inp, inp->inp_label, m, mlabel);
|
|
}
|
|
|
|
int
|
|
mac_fragment_match(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
struct label *label;
|
|
int result;
|
|
|
|
label = mac_mbuf_to_label(fragment);
|
|
|
|
result = 1;
|
|
MAC_BOOLEAN(fragment_match, &&, fragment, label, ipq,
|
|
ipq->ipq_label);
|
|
|
|
return (result);
|
|
}
|
|
|
|
void
|
|
mac_reflect_mbuf_icmp(struct mbuf *m)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_mbuf_to_label(m);
|
|
|
|
MAC_PERFORM(reflect_mbuf_icmp, m, label);
|
|
}
|
|
void
|
|
mac_reflect_mbuf_tcp(struct mbuf *m)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_mbuf_to_label(m);
|
|
|
|
MAC_PERFORM(reflect_mbuf_tcp, m, label);
|
|
}
|
|
|
|
void
|
|
mac_update_ipq(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_mbuf_to_label(fragment);
|
|
|
|
MAC_PERFORM(update_ipq, fragment, label, ipq, ipq->ipq_label);
|
|
}
|
|
|
|
int
|
|
mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
M_ASSERTPKTHDR(m);
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
label = mac_mbuf_to_label(m);
|
|
|
|
MAC_CHECK(check_inpcb_deliver, inp, inp->inp_label, m, label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp)
|
|
{
|
|
|
|
/* XXX: assert socket lock. */
|
|
INP_LOCK_ASSERT(inp);
|
|
MAC_PERFORM(inpcb_sosetlabel, so, so->so_label, inp, inp->inp_label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_firewall(struct mbuf *m)
|
|
{
|
|
struct label *label;
|
|
|
|
M_ASSERTPKTHDR(m);
|
|
label = mac_mbuf_to_label(m);
|
|
MAC_PERFORM(create_mbuf_from_firewall, m, label);
|
|
}
|