30d239bc4c
from Mac OS X Leopard--rationalize naming for entry points to
the following general forms:
mac_<object>_<method/action>
mac_<object>_check_<method/action>
The previous naming scheme was inconsistent and mostly
reversed from the new scheme. Also, make object types more
consistent and remove spaces from object types that contain
multiple parts ("posix_sem" -> "posixsem") to make mechanical
parsing easier. Introduce a new "netinet" object type for
certain IPv4/IPv6-related methods. Also simplify, slightly,
some entry point names.
All MAC policy modules will need to be recompiled, and modules
not updates as part of this commit will need to be modified to
conform to the new KPI.
Sponsored by: SPARTA (original patches against Mac OS X)
Obtained from: TrustedBSD Project, Apple Computer
341 lines
7.6 KiB
C
341 lines
7.6 KiB
C
/*-
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* Copyright (c) 1999-2002 Robert N. M. Watson
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* Copyright (c) 2001 Ilmar S. Habibulin
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* Copyright (c) 2001-2004 Networks Associates Technology, 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 and Ilmar Habibulin for the
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* TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA 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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* 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/mount.h>
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#include <sys/file.h>
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#include <sys/namei.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <net/if.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 <security/mac/mac_framework.h>
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#include <security/mac/mac_internal.h>
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#include <security/mac/mac_policy.h>
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static struct label *
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mac_inpcb_label_alloc(int flag)
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{
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struct label *label;
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int error;
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label = mac_labelzone_alloc(flag);
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if (label == NULL)
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return (NULL);
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MAC_CHECK(inpcb_init_label, label, flag);
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if (error) {
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MAC_PERFORM(inpcb_destroy_label, label);
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mac_labelzone_free(label);
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return (NULL);
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}
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return (label);
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}
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int
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mac_inpcb_init(struct inpcb *inp, int flag)
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{
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inp->inp_label = mac_inpcb_label_alloc(flag);
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if (inp->inp_label == NULL)
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return (ENOMEM);
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return (0);
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}
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static struct label *
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mac_ipq_label_alloc(int flag)
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{
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struct label *label;
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int error;
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label = mac_labelzone_alloc(flag);
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if (label == NULL)
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return (NULL);
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MAC_CHECK(ipq_init_label, label, flag);
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if (error) {
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MAC_PERFORM(ipq_destroy_label, label);
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mac_labelzone_free(label);
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return (NULL);
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}
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return (label);
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}
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int
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mac_ipq_init(struct ipq *ipq, int flag)
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{
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ipq->ipq_label = mac_ipq_label_alloc(flag);
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if (ipq->ipq_label == NULL)
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return (ENOMEM);
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return (0);
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}
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static void
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mac_inpcb_label_free(struct label *label)
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{
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MAC_PERFORM(inpcb_destroy_label, label);
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mac_labelzone_free(label);
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}
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void
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mac_inpcb_destroy(struct inpcb *inp)
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{
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mac_inpcb_label_free(inp->inp_label);
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inp->inp_label = NULL;
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}
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static void
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mac_ipq_label_free(struct label *label)
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{
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MAC_PERFORM(ipq_destroy_label, label);
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mac_labelzone_free(label);
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}
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void
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mac_ipq_destroy(struct ipq *ipq)
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{
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mac_ipq_label_free(ipq->ipq_label);
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ipq->ipq_label = NULL;
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}
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void
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mac_inpcb_create(struct socket *so, struct inpcb *inp)
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{
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MAC_PERFORM(inpcb_create, so, so->so_label, inp, inp->inp_label);
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}
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void
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mac_ipq_reassemble(struct ipq *ipq, struct mbuf *m)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(ipq_reassemble, ipq, ipq->ipq_label, m, label);
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}
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void
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mac_netinet_fragment(struct mbuf *m, struct mbuf *frag)
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{
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struct label *mlabel, *fraglabel;
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mlabel = mac_mbuf_to_label(m);
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fraglabel = mac_mbuf_to_label(frag);
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MAC_PERFORM(netinet_fragment, m, mlabel, frag, fraglabel);
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}
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void
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mac_ipq_create(struct mbuf *m, struct ipq *ipq)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(ipq_create, m, label, ipq, ipq->ipq_label);
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}
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void
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mac_inpcb_create_mbuf(struct inpcb *inp, struct mbuf *m)
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{
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struct label *mlabel;
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INP_LOCK_ASSERT(inp);
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mlabel = mac_mbuf_to_label(m);
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MAC_PERFORM(inpcb_create_mbuf, inp, inp->inp_label, m, mlabel);
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}
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int
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mac_ipq_match(struct mbuf *m, struct ipq *ipq)
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{
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struct label *label;
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int result;
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label = mac_mbuf_to_label(m);
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result = 1;
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MAC_BOOLEAN(ipq_match, &&, m, label, ipq, ipq->ipq_label);
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return (result);
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}
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void
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mac_netinet_icmp_reply(struct mbuf *m)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(netinet_icmp_reply, m, label);
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}
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void
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mac_netinet_tcp_reply(struct mbuf *m)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(netinet_tcp_reply, m, label);
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}
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void
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mac_ipq_update(struct mbuf *m, struct ipq *ipq)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(ipq_update, m, label, ipq, ipq->ipq_label);
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}
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int
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mac_inpcb_check_deliver(struct inpcb *inp, struct mbuf *m)
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{
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struct label *label;
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int error;
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M_ASSERTPKTHDR(m);
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label = mac_mbuf_to_label(m);
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MAC_CHECK(inpcb_check_deliver, inp, inp->inp_label, m, label);
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return (error);
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}
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void
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mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp)
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{
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INP_LOCK_ASSERT(inp);
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SOCK_LOCK_ASSERT(so);
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MAC_PERFORM(inpcb_sosetlabel, so, so->so_label, inp, inp->inp_label);
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}
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void
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mac_mbuf_create_from_firewall(struct mbuf *m)
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{
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struct label *label;
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M_ASSERTPKTHDR(m);
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(mbuf_create_from_firewall, m, label);
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}
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/*
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* These functions really should be referencing the syncache structure
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* instead of the label. However, due to some of the complexities associated
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* with exposing this syncache structure we operate directly on it's label
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* pointer. This should be OK since we aren't making any access control
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* decisions within this code directly, we are merely allocating and copying
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* label storage so we can properly initialize mbuf labels for any packets
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* the syncache code might create.
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*/
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void
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mac_destroy_syncache(struct label **label)
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{
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MAC_PERFORM(destroy_syncache_label, *label);
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mac_labelzone_free(*label);
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*label = NULL;
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}
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int
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mac_init_syncache(struct label **label)
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{
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int error;
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*label = mac_labelzone_alloc(M_NOWAIT);
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if (*label == NULL)
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return (ENOMEM);
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/*
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* Since we are holding the inpcb locks the policy can not allocate
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* policy specific label storage using M_WAITOK. So we need to do a
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* MAC_CHECK instead of the typical MAC_PERFORM so we can propagate
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* allocation failures back to the syncache code.
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*/
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MAC_CHECK(init_syncache_label, *label, M_NOWAIT);
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return (error);
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}
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void
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mac_init_syncache_from_inpcb(struct label *label, struct inpcb *inp)
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{
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INP_LOCK_ASSERT(inp);
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MAC_PERFORM(init_syncache_from_inpcb, label, inp);
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}
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void
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mac_create_mbuf_from_syncache(struct label *sc_label, struct mbuf *m)
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{
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struct label *mlabel;
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M_ASSERTPKTHDR(m);
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mlabel = mac_mbuf_to_label(m);
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MAC_PERFORM(create_mbuf_from_syncache, sc_label, m, mlabel);
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}
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