7798 lines
195 KiB
C
7798 lines
195 KiB
C
/* $FreeBSD$ */
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/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
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/*-
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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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/*
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* This code is referd to RFC 2367
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*/
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipsec.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/mbuf.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/malloc.h>
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#include <sys/rmlock.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 <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/refcount.h>
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#include <sys/syslog.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/vnet.h>
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#include <net/raw_cb.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/in_var.h>
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/in6_var.h>
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#include <netinet6/ip6_var.h>
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#endif /* INET6 */
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#if defined(INET) || defined(INET6)
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#include <netinet/in_pcb.h>
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#endif
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#ifdef INET6
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#include <netinet6/in6_pcb.h>
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#endif /* INET6 */
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#include <net/pfkeyv2.h>
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#include <netipsec/keydb.h>
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#include <netipsec/key.h>
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#include <netipsec/keysock.h>
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#include <netipsec/key_debug.h>
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#include <netipsec/ipsec.h>
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#ifdef INET6
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#include <netipsec/ipsec6.h>
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#endif
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#include <netipsec/xform.h>
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#include <machine/stdarg.h>
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/* randomness */
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#include <sys/random.h>
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#define FULLMASK 0xff
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#define _BITS(bytes) ((bytes) << 3)
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/*
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* Note on SA reference counting:
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* - SAs that are not in DEAD state will have (total external reference + 1)
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* following value in reference count field. they cannot be freed and are
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* referenced from SA header.
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* - SAs that are in DEAD state will have (total external reference)
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* in reference count field. they are ready to be freed. reference from
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* SA header will be removed in key_delsav(), when the reference count
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* field hits 0 (= no external reference other than from SA header.
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*/
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VNET_DEFINE(u_int32_t, key_debug_level) = 0;
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static VNET_DEFINE(u_int, key_spi_trycnt) = 1000;
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static VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100;
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static VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */
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static VNET_DEFINE(u_int32_t, policy_id) = 0;
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/*interval to initialize randseed,1(m)*/
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static VNET_DEFINE(u_int, key_int_random) = 60;
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/* interval to expire acquiring, 30(s)*/
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static VNET_DEFINE(u_int, key_larval_lifetime) = 30;
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/* counter for blocking SADB_ACQUIRE.*/
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static VNET_DEFINE(int, key_blockacq_count) = 10;
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/* lifetime for blocking SADB_ACQUIRE.*/
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static VNET_DEFINE(int, key_blockacq_lifetime) = 20;
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/* preferred old sa rather than new sa.*/
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static VNET_DEFINE(int, key_preferred_oldsa) = 1;
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#define V_key_spi_trycnt VNET(key_spi_trycnt)
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#define V_key_spi_minval VNET(key_spi_minval)
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#define V_key_spi_maxval VNET(key_spi_maxval)
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#define V_policy_id VNET(policy_id)
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#define V_key_int_random VNET(key_int_random)
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#define V_key_larval_lifetime VNET(key_larval_lifetime)
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#define V_key_blockacq_count VNET(key_blockacq_count)
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#define V_key_blockacq_lifetime VNET(key_blockacq_lifetime)
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#define V_key_preferred_oldsa VNET(key_preferred_oldsa)
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static VNET_DEFINE(u_int32_t, acq_seq) = 0;
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#define V_acq_seq VNET(acq_seq)
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/* SPD */
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static VNET_DEFINE(TAILQ_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]);
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static struct rmlock sptree_lock;
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#define V_sptree VNET(sptree)
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#define SPTREE_LOCK_INIT() rm_init(&sptree_lock, "sptree")
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#define SPTREE_LOCK_DESTROY() rm_destroy(&sptree_lock)
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#define SPTREE_RLOCK_TRACKER struct rm_priotracker sptree_tracker
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#define SPTREE_RLOCK() rm_rlock(&sptree_lock, &sptree_tracker)
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#define SPTREE_RUNLOCK() rm_runlock(&sptree_lock, &sptree_tracker)
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#define SPTREE_RLOCK_ASSERT() rm_assert(&sptree_lock, RA_RLOCKED)
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#define SPTREE_WLOCK() rm_wlock(&sptree_lock)
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#define SPTREE_WUNLOCK() rm_wunlock(&sptree_lock)
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#define SPTREE_WLOCK_ASSERT() rm_assert(&sptree_lock, RA_WLOCKED)
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#define SPTREE_UNLOCK_ASSERT() rm_assert(&sptree_lock, RA_UNLOCKED)
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static VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */
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#define V_sahtree VNET(sahtree)
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static struct mtx sahtree_lock;
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#define SAHTREE_LOCK_INIT() \
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mtx_init(&sahtree_lock, "sahtree", \
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"fast ipsec security association database", MTX_DEF)
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#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock)
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#define SAHTREE_LOCK() mtx_lock(&sahtree_lock)
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#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock)
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#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED)
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/* registed list */
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static VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]);
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#define V_regtree VNET(regtree)
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static struct mtx regtree_lock;
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#define REGTREE_LOCK_INIT() \
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mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF)
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#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock)
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#define REGTREE_LOCK() mtx_lock(®tree_lock)
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#define REGTREE_UNLOCK() mtx_unlock(®tree_lock)
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#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED)
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static VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */
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#define V_acqtree VNET(acqtree)
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static struct mtx acq_lock;
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#define ACQ_LOCK_INIT() \
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mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF)
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#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock)
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#define ACQ_LOCK() mtx_lock(&acq_lock)
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#define ACQ_UNLOCK() mtx_unlock(&acq_lock)
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#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED)
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/* SP acquiring list */
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static VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree);
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#define V_spacqtree VNET(spacqtree)
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static struct mtx spacq_lock;
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#define SPACQ_LOCK_INIT() \
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mtx_init(&spacq_lock, "spacqtree", \
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"fast ipsec security policy acquire list", MTX_DEF)
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#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock)
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#define SPACQ_LOCK() mtx_lock(&spacq_lock)
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#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock)
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#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED)
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/* search order for SAs */
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static const u_int saorder_state_valid_prefer_old[] = {
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SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
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};
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static const u_int saorder_state_valid_prefer_new[] = {
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SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
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};
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static const u_int saorder_state_alive[] = {
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/* except DEAD */
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SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
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};
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static const u_int saorder_state_any[] = {
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SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
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SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
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};
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static const int minsize[] = {
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sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
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sizeof(struct sadb_sa), /* SADB_EXT_SA */
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sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
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sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
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sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
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sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
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sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
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sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
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sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
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sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
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sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
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sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
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sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
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sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
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sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
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sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
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sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
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0, /* SADB_X_EXT_KMPRIVATE */
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sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
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sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
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sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
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sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
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sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
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sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */
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sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */
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sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
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};
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static const int maxsize[] = {
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sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
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sizeof(struct sadb_sa), /* SADB_EXT_SA */
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sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
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sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
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sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
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0, /* SADB_EXT_ADDRESS_SRC */
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0, /* SADB_EXT_ADDRESS_DST */
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0, /* SADB_EXT_ADDRESS_PROXY */
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0, /* SADB_EXT_KEY_AUTH */
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0, /* SADB_EXT_KEY_ENCRYPT */
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0, /* SADB_EXT_IDENTITY_SRC */
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0, /* SADB_EXT_IDENTITY_DST */
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0, /* SADB_EXT_SENSITIVITY */
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0, /* SADB_EXT_PROPOSAL */
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0, /* SADB_EXT_SUPPORTED_AUTH */
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0, /* SADB_EXT_SUPPORTED_ENCRYPT */
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sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
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0, /* SADB_X_EXT_KMPRIVATE */
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0, /* SADB_X_EXT_POLICY */
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sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
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sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
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sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
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sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
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0, /* SADB_X_EXT_NAT_T_OAI */
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0, /* SADB_X_EXT_NAT_T_OAR */
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sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
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};
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static VNET_DEFINE(int, ipsec_esp_keymin) = 256;
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static VNET_DEFINE(int, ipsec_esp_auth) = 0;
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static VNET_DEFINE(int, ipsec_ah_keymin) = 128;
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#define V_ipsec_esp_keymin VNET(ipsec_esp_keymin)
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#define V_ipsec_esp_auth VNET(ipsec_esp_auth)
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#define V_ipsec_ah_keymin VNET(ipsec_ah_keymin)
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_net_key);
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#endif
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SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, "");
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/* max count of trial for the decision of spi value */
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SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, "");
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/* minimum spi value to allocate automatically. */
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SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, "");
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/* maximun spi value to allocate automatically. */
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SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, "");
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/* interval to initialize randseed */
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SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_int_random), 0, "");
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/* lifetime for larval SA */
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SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, "");
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/* counter for blocking to send SADB_ACQUIRE to IKEd */
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SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, "");
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/* lifetime for blocking to send SADB_ACQUIRE to IKEd */
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SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, "");
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/* ESP auth */
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SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, "");
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/* minimum ESP key length */
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SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, "");
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/* minimum AH key length */
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SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, "");
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/* perfered old SA rather than new SA */
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SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, preferred_oldsa,
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CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, "");
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#define __LIST_CHAINED(elm) \
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(!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
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#define LIST_INSERT_TAIL(head, elm, type, field) \
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do {\
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struct type *curelm = LIST_FIRST(head); \
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if (curelm == NULL) {\
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LIST_INSERT_HEAD(head, elm, field); \
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} else { \
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while (LIST_NEXT(curelm, field)) \
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curelm = LIST_NEXT(curelm, field);\
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LIST_INSERT_AFTER(curelm, elm, field);\
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}\
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} while (0)
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#define KEY_CHKSASTATE(head, sav, name) \
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do { \
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if ((head) != (sav)) { \
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ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
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(name), (head), (sav))); \
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continue; \
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} \
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} while (0)
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#define KEY_CHKSPDIR(head, sp, name) \
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do { \
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if ((head) != (sp)) { \
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ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
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"anyway continue.\n", \
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(name), (head), (sp))); \
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} \
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} while (0)
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MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association");
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MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head");
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MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy");
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MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request");
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MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous");
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MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire");
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MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire");
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/*
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* set parameters into secpolicyindex buffer.
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* Must allocate secpolicyindex buffer passed to this function.
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*/
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#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
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do { \
|
|
bzero((idx), sizeof(struct secpolicyindex)); \
|
|
(idx)->dir = (_dir); \
|
|
(idx)->prefs = (ps); \
|
|
(idx)->prefd = (pd); \
|
|
(idx)->ul_proto = (ulp); \
|
|
bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
|
|
bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
|
|
} while (0)
|
|
|
|
/*
|
|
* set parameters into secasindex buffer.
|
|
* Must allocate secasindex buffer before calling this function.
|
|
*/
|
|
#define KEY_SETSECASIDX(p, m, r, s, d, idx) \
|
|
do { \
|
|
bzero((idx), sizeof(struct secasindex)); \
|
|
(idx)->proto = (p); \
|
|
(idx)->mode = (m); \
|
|
(idx)->reqid = (r); \
|
|
bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
|
|
bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
|
|
} while (0)
|
|
|
|
/* key statistics */
|
|
struct _keystat {
|
|
u_long getspi_count; /* the avarage of count to try to get new SPI */
|
|
} keystat;
|
|
|
|
struct sadb_msghdr {
|
|
struct sadb_msg *msg;
|
|
struct sadb_ext *ext[SADB_EXT_MAX + 1];
|
|
int extoff[SADB_EXT_MAX + 1];
|
|
int extlen[SADB_EXT_MAX + 1];
|
|
};
|
|
|
|
#ifndef IPSEC_DEBUG2
|
|
static struct callout key_timer;
|
|
#endif
|
|
|
|
static struct secasvar *key_allocsa_policy(const struct secasindex *);
|
|
static void key_freesp_so(struct secpolicy **);
|
|
static struct secasvar *key_do_allocsa_policy(struct secashead *, u_int);
|
|
static void key_unlink(struct secpolicy *);
|
|
static struct secpolicy *key_getsp(struct secpolicyindex *);
|
|
static struct secpolicy *key_getspbyid(u_int32_t);
|
|
static u_int32_t key_newreqid(void);
|
|
static struct mbuf *key_gather_mbuf(struct mbuf *,
|
|
const struct sadb_msghdr *, int, int, ...);
|
|
static int key_spdadd(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static u_int32_t key_getnewspid(void);
|
|
static int key_spddelete(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_spddelete2(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_spdget(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_spdflush(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_spddump(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static struct mbuf *key_setdumpsp(struct secpolicy *,
|
|
u_int8_t, u_int32_t, u_int32_t);
|
|
static u_int key_getspreqmsglen(struct secpolicy *);
|
|
static int key_spdexpire(struct secpolicy *);
|
|
static struct secashead *key_newsah(struct secasindex *);
|
|
static void key_delsah(struct secashead *);
|
|
static struct secasvar *key_newsav(struct mbuf *,
|
|
const struct sadb_msghdr *, struct secashead *, int *,
|
|
const char*, int);
|
|
#define KEY_NEWSAV(m, sadb, sah, e) \
|
|
key_newsav(m, sadb, sah, e, __FILE__, __LINE__)
|
|
static void key_delsav(struct secasvar *);
|
|
static struct secashead *key_getsah(struct secasindex *);
|
|
static struct secasvar *key_checkspidup(struct secasindex *, u_int32_t);
|
|
static struct secasvar *key_getsavbyspi(struct secashead *, u_int32_t);
|
|
static int key_setsaval(struct secasvar *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_mature(struct secasvar *);
|
|
static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t,
|
|
u_int8_t, u_int32_t, u_int32_t);
|
|
static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t,
|
|
u_int32_t, pid_t, u_int16_t);
|
|
static struct mbuf *key_setsadbsa(struct secasvar *);
|
|
static struct mbuf *key_setsadbaddr(u_int16_t,
|
|
const struct sockaddr *, u_int8_t, u_int16_t);
|
|
#ifdef IPSEC_NAT_T
|
|
static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t);
|
|
static struct mbuf *key_setsadbxtype(u_int16_t);
|
|
#endif
|
|
static void key_porttosaddr(struct sockaddr *, u_int16_t);
|
|
#define KEY_PORTTOSADDR(saddr, port) \
|
|
key_porttosaddr((struct sockaddr *)(saddr), (port))
|
|
static struct mbuf *key_setsadbxsa2(u_int8_t, u_int32_t, u_int32_t);
|
|
static struct mbuf *key_setsadbxpolicy(u_int16_t, u_int8_t,
|
|
u_int32_t);
|
|
static struct seckey *key_dup_keymsg(const struct sadb_key *, u_int,
|
|
struct malloc_type *);
|
|
static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src,
|
|
struct malloc_type *type);
|
|
#ifdef INET6
|
|
static int key_ismyaddr6(struct sockaddr_in6 *);
|
|
#endif
|
|
|
|
/* flags for key_cmpsaidx() */
|
|
#define CMP_HEAD 1 /* protocol, addresses. */
|
|
#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
|
|
#define CMP_REQID 3 /* additionally HEAD, reaid. */
|
|
#define CMP_EXACTLY 4 /* all elements. */
|
|
static int key_cmpsaidx(const struct secasindex *,
|
|
const struct secasindex *, int);
|
|
static int key_cmpspidx_exactly(struct secpolicyindex *,
|
|
struct secpolicyindex *);
|
|
static int key_cmpspidx_withmask(struct secpolicyindex *,
|
|
struct secpolicyindex *);
|
|
static int key_sockaddrcmp(const struct sockaddr *,
|
|
const struct sockaddr *, int);
|
|
static int key_bbcmp(const void *, const void *, u_int);
|
|
static u_int16_t key_satype2proto(u_int8_t);
|
|
static u_int8_t key_proto2satype(u_int16_t);
|
|
|
|
static int key_getspi(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static u_int32_t key_do_getnewspi(struct sadb_spirange *,
|
|
struct secasindex *);
|
|
static int key_update(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
#ifdef IPSEC_DOSEQCHECK
|
|
static struct secasvar *key_getsavbyseq(struct secashead *, u_int32_t);
|
|
#endif
|
|
static int key_add(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_setident(struct secashead *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static struct mbuf *key_getmsgbuf_x1(struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_delete(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_delete_all(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *, u_int16_t);
|
|
static int key_get(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
|
|
static void key_getcomb_setlifetime(struct sadb_comb *);
|
|
static struct mbuf *key_getcomb_esp(void);
|
|
static struct mbuf *key_getcomb_ah(void);
|
|
static struct mbuf *key_getcomb_ipcomp(void);
|
|
static struct mbuf *key_getprop(const struct secasindex *);
|
|
|
|
static int key_acquire(const struct secasindex *, struct secpolicy *);
|
|
static struct secacq *key_newacq(const struct secasindex *);
|
|
static struct secacq *key_getacq(const struct secasindex *);
|
|
static struct secacq *key_getacqbyseq(u_int32_t);
|
|
static struct secspacq *key_newspacq(struct secpolicyindex *);
|
|
static struct secspacq *key_getspacq(struct secpolicyindex *);
|
|
static int key_acquire2(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_register(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_expire(struct secasvar *, int);
|
|
static int key_flush(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_dump(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_promisc(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *);
|
|
static int key_senderror(struct socket *, struct mbuf *, int);
|
|
static int key_validate_ext(const struct sadb_ext *, int);
|
|
static int key_align(struct mbuf *, struct sadb_msghdr *);
|
|
static struct mbuf *key_setlifetime(struct seclifetime *src,
|
|
u_int16_t exttype);
|
|
static struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype);
|
|
|
|
#if 0
|
|
static const char *key_getfqdn(void);
|
|
static const char *key_getuserfqdn(void);
|
|
#endif
|
|
static void key_sa_chgstate(struct secasvar *, u_int8_t);
|
|
|
|
static __inline void
|
|
sa_initref(struct secasvar *sav)
|
|
{
|
|
|
|
refcount_init(&sav->refcnt, 1);
|
|
}
|
|
static __inline void
|
|
sa_addref(struct secasvar *sav)
|
|
{
|
|
|
|
refcount_acquire(&sav->refcnt);
|
|
IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow"));
|
|
}
|
|
static __inline int
|
|
sa_delref(struct secasvar *sav)
|
|
{
|
|
|
|
IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow"));
|
|
return (refcount_release(&sav->refcnt));
|
|
}
|
|
|
|
#define SP_ADDREF(p) refcount_acquire(&(p)->refcnt)
|
|
#define SP_DELREF(p) refcount_release(&(p)->refcnt)
|
|
|
|
/*
|
|
* Update the refcnt while holding the SPTREE lock.
|
|
*/
|
|
void
|
|
key_addref(struct secpolicy *sp)
|
|
{
|
|
|
|
SP_ADDREF(sp);
|
|
}
|
|
|
|
/*
|
|
* Return 0 when there are known to be no SP's for the specified
|
|
* direction. Otherwise return 1. This is used by IPsec code
|
|
* to optimize performance.
|
|
*/
|
|
int
|
|
key_havesp(u_int dir)
|
|
{
|
|
|
|
return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
|
|
TAILQ_FIRST(&V_sptree[dir]) != NULL : 1);
|
|
}
|
|
|
|
/* %%% IPsec policy management */
|
|
/*
|
|
* allocating a SP for OUTBOUND or INBOUND packet.
|
|
* Must call key_freesp() later.
|
|
* OUT: NULL: not found
|
|
* others: found and return the pointer.
|
|
*/
|
|
struct secpolicy *
|
|
key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where,
|
|
int tag)
|
|
{
|
|
SPTREE_RLOCK_TRACKER;
|
|
struct secpolicy *sp;
|
|
|
|
IPSEC_ASSERT(spidx != NULL, ("null spidx"));
|
|
IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
|
|
("invalid direction %u", dir));
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s from %s:%u\n", __func__, where, tag));
|
|
|
|
/* get a SP entry */
|
|
KEYDEBUG(KEYDEBUG_IPSEC_DATA,
|
|
printf("*** objects\n");
|
|
kdebug_secpolicyindex(spidx));
|
|
|
|
SPTREE_RLOCK();
|
|
TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
|
|
KEYDEBUG(KEYDEBUG_IPSEC_DATA,
|
|
printf("*** in SPD\n");
|
|
kdebug_secpolicyindex(&sp->spidx));
|
|
if (key_cmpspidx_withmask(&sp->spidx, spidx))
|
|
goto found;
|
|
}
|
|
sp = NULL;
|
|
found:
|
|
if (sp) {
|
|
/* sanity check */
|
|
KEY_CHKSPDIR(sp->spidx.dir, dir, __func__);
|
|
|
|
/* found a SPD entry */
|
|
sp->lastused = time_second;
|
|
SP_ADDREF(sp);
|
|
}
|
|
SPTREE_RUNLOCK();
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__,
|
|
sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
|
|
return sp;
|
|
}
|
|
|
|
/*
|
|
* allocating a SP for OUTBOUND or INBOUND packet.
|
|
* Must call key_freesp() later.
|
|
* OUT: NULL: not found
|
|
* others: found and return the pointer.
|
|
*/
|
|
struct secpolicy *
|
|
key_allocsp2(u_int32_t spi, union sockaddr_union *dst, u_int8_t proto,
|
|
u_int dir, const char* where, int tag)
|
|
{
|
|
SPTREE_RLOCK_TRACKER;
|
|
struct secpolicy *sp;
|
|
|
|
IPSEC_ASSERT(dst != NULL, ("null dst"));
|
|
IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
|
|
("invalid direction %u", dir));
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s from %s:%u\n", __func__, where, tag));
|
|
|
|
/* get a SP entry */
|
|
KEYDEBUG(KEYDEBUG_IPSEC_DATA,
|
|
printf("*** objects\n");
|
|
printf("spi %u proto %u dir %u\n", spi, proto, dir);
|
|
kdebug_sockaddr(&dst->sa));
|
|
|
|
SPTREE_RLOCK();
|
|
TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
|
|
KEYDEBUG(KEYDEBUG_IPSEC_DATA,
|
|
printf("*** in SPD\n");
|
|
kdebug_secpolicyindex(&sp->spidx));
|
|
/* compare simple values, then dst address */
|
|
if (sp->spidx.ul_proto != proto)
|
|
continue;
|
|
/* NB: spi's must exist and match */
|
|
if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi)
|
|
continue;
|
|
if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0)
|
|
goto found;
|
|
}
|
|
sp = NULL;
|
|
found:
|
|
if (sp) {
|
|
/* sanity check */
|
|
KEY_CHKSPDIR(sp->spidx.dir, dir, __func__);
|
|
|
|
/* found a SPD entry */
|
|
sp->lastused = time_second;
|
|
SP_ADDREF(sp);
|
|
}
|
|
SPTREE_RUNLOCK();
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__,
|
|
sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
|
|
return sp;
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* return a policy that matches this particular inbound packet.
|
|
* XXX slow
|
|
*/
|
|
struct secpolicy *
|
|
key_gettunnel(const struct sockaddr *osrc,
|
|
const struct sockaddr *odst,
|
|
const struct sockaddr *isrc,
|
|
const struct sockaddr *idst,
|
|
const char* where, int tag)
|
|
{
|
|
struct secpolicy *sp;
|
|
const int dir = IPSEC_DIR_INBOUND;
|
|
struct ipsecrequest *r1, *r2, *p;
|
|
struct secpolicyindex spidx;
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s from %s:%u\n", __func__, where, tag));
|
|
|
|
if (isrc->sa_family != idst->sa_family) {
|
|
ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.",
|
|
__func__, isrc->sa_family, idst->sa_family));
|
|
sp = NULL;
|
|
goto done;
|
|
}
|
|
|
|
SPTREE_LOCK();
|
|
LIST_FOREACH(sp, &V_sptree[dir], chain) {
|
|
if (sp->state == IPSEC_SPSTATE_DEAD)
|
|
continue;
|
|
|
|
r1 = r2 = NULL;
|
|
for (p = sp->req; p; p = p->next) {
|
|
if (p->saidx.mode != IPSEC_MODE_TUNNEL)
|
|
continue;
|
|
|
|
r1 = r2;
|
|
r2 = p;
|
|
|
|
if (!r1) {
|
|
/* here we look at address matches only */
|
|
spidx = sp->spidx;
|
|
if (isrc->sa_len > sizeof(spidx.src) ||
|
|
idst->sa_len > sizeof(spidx.dst))
|
|
continue;
|
|
bcopy(isrc, &spidx.src, isrc->sa_len);
|
|
bcopy(idst, &spidx.dst, idst->sa_len);
|
|
if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
|
|
continue;
|
|
} else {
|
|
if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) ||
|
|
key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0))
|
|
continue;
|
|
}
|
|
|
|
if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) ||
|
|
key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0))
|
|
continue;
|
|
|
|
goto found;
|
|
}
|
|
}
|
|
sp = NULL;
|
|
found:
|
|
if (sp) {
|
|
sp->lastused = time_second;
|
|
SP_ADDREF(sp);
|
|
}
|
|
SPTREE_UNLOCK();
|
|
done:
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__,
|
|
sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
|
|
return sp;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* allocating an SA entry for an *OUTBOUND* packet.
|
|
* checking each request entries in SP, and acquire an SA if need.
|
|
* OUT: 0: there are valid requests.
|
|
* ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
|
|
*/
|
|
int
|
|
key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx)
|
|
{
|
|
u_int level;
|
|
int error;
|
|
struct secasvar *sav;
|
|
|
|
IPSEC_ASSERT(isr != NULL, ("null isr"));
|
|
IPSEC_ASSERT(saidx != NULL, ("null saidx"));
|
|
IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
|
|
saidx->mode == IPSEC_MODE_TUNNEL,
|
|
("unexpected policy %u", saidx->mode));
|
|
|
|
/*
|
|
* XXX guard against protocol callbacks from the crypto
|
|
* thread as they reference ipsecrequest.sav which we
|
|
* temporarily null out below. Need to rethink how we
|
|
* handle bundled SA's in the callback thread.
|
|
*/
|
|
IPSECREQUEST_LOCK_ASSERT(isr);
|
|
|
|
/* get current level */
|
|
level = ipsec_get_reqlevel(isr);
|
|
|
|
/*
|
|
* We check new SA in the IPsec request because a different
|
|
* SA may be involved each time this request is checked, either
|
|
* because new SAs are being configured, or this request is
|
|
* associated with an unconnected datagram socket, or this request
|
|
* is associated with a system default policy.
|
|
*
|
|
* key_allocsa_policy should allocate the oldest SA available.
|
|
* See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
|
|
*/
|
|
sav = key_allocsa_policy(saidx);
|
|
if (sav != isr->sav) {
|
|
/* SA need to be updated. */
|
|
if (!IPSECREQUEST_UPGRADE(isr)) {
|
|
/* Kick everyone off. */
|
|
IPSECREQUEST_UNLOCK(isr);
|
|
IPSECREQUEST_WLOCK(isr);
|
|
}
|
|
if (isr->sav != NULL)
|
|
KEY_FREESAV(&isr->sav);
|
|
isr->sav = sav;
|
|
IPSECREQUEST_DOWNGRADE(isr);
|
|
} else if (sav != NULL)
|
|
KEY_FREESAV(&sav);
|
|
|
|
/* When there is SA. */
|
|
if (isr->sav != NULL) {
|
|
if (isr->sav->state != SADB_SASTATE_MATURE &&
|
|
isr->sav->state != SADB_SASTATE_DYING)
|
|
return EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
/* there is no SA */
|
|
error = key_acquire(saidx, isr->sp);
|
|
if (error != 0) {
|
|
/* XXX What should I do ? */
|
|
ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n",
|
|
__func__, error));
|
|
return error;
|
|
}
|
|
|
|
if (level != IPSEC_LEVEL_REQUIRE) {
|
|
/* XXX sigh, the interface to this routine is botched */
|
|
IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA"));
|
|
return 0;
|
|
} else {
|
|
return ENOENT;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* allocating a SA for policy entry from SAD.
|
|
* NOTE: searching SAD of aliving state.
|
|
* OUT: NULL: not found.
|
|
* others: found and return the pointer.
|
|
*/
|
|
static struct secasvar *
|
|
key_allocsa_policy(const struct secasindex *saidx)
|
|
{
|
|
#define N(a) _ARRAYLEN(a)
|
|
struct secashead *sah;
|
|
struct secasvar *sav;
|
|
u_int stateidx, arraysize;
|
|
const u_int *state_valid;
|
|
|
|
state_valid = NULL; /* silence gcc */
|
|
arraysize = 0; /* silence gcc */
|
|
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (sah->state == SADB_SASTATE_DEAD)
|
|
continue;
|
|
if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) {
|
|
if (V_key_preferred_oldsa) {
|
|
state_valid = saorder_state_valid_prefer_old;
|
|
arraysize = N(saorder_state_valid_prefer_old);
|
|
} else {
|
|
state_valid = saorder_state_valid_prefer_new;
|
|
arraysize = N(saorder_state_valid_prefer_new);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
if (sah == NULL)
|
|
return NULL;
|
|
|
|
/* search valid state */
|
|
for (stateidx = 0; stateidx < arraysize; stateidx++) {
|
|
sav = key_do_allocsa_policy(sah, state_valid[stateidx]);
|
|
if (sav != NULL)
|
|
return sav;
|
|
}
|
|
|
|
return NULL;
|
|
#undef N
|
|
}
|
|
|
|
/*
|
|
* searching SAD with direction, protocol, mode and state.
|
|
* called by key_allocsa_policy().
|
|
* OUT:
|
|
* NULL : not found
|
|
* others : found, pointer to a SA.
|
|
*/
|
|
static struct secasvar *
|
|
key_do_allocsa_policy(struct secashead *sah, u_int state)
|
|
{
|
|
struct secasvar *sav, *nextsav, *candidate, *d;
|
|
|
|
/* initilize */
|
|
candidate = NULL;
|
|
|
|
SAHTREE_LOCK();
|
|
for (sav = LIST_FIRST(&sah->savtree[state]);
|
|
sav != NULL;
|
|
sav = nextsav) {
|
|
|
|
nextsav = LIST_NEXT(sav, chain);
|
|
|
|
/* sanity check */
|
|
KEY_CHKSASTATE(sav->state, state, __func__);
|
|
|
|
/* initialize */
|
|
if (candidate == NULL) {
|
|
candidate = sav;
|
|
continue;
|
|
}
|
|
|
|
/* Which SA is the better ? */
|
|
|
|
IPSEC_ASSERT(candidate->lft_c != NULL,
|
|
("null candidate lifetime"));
|
|
IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime"));
|
|
|
|
/* What the best method is to compare ? */
|
|
if (V_key_preferred_oldsa) {
|
|
if (candidate->lft_c->addtime >
|
|
sav->lft_c->addtime) {
|
|
candidate = sav;
|
|
}
|
|
continue;
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
/* preferred new sa rather than old sa */
|
|
if (candidate->lft_c->addtime <
|
|
sav->lft_c->addtime) {
|
|
d = candidate;
|
|
candidate = sav;
|
|
} else
|
|
d = sav;
|
|
|
|
/*
|
|
* prepared to delete the SA when there is more
|
|
* suitable candidate and the lifetime of the SA is not
|
|
* permanent.
|
|
*/
|
|
if (d->lft_h->addtime != 0) {
|
|
struct mbuf *m, *result;
|
|
u_int8_t satype;
|
|
|
|
key_sa_chgstate(d, SADB_SASTATE_DEAD);
|
|
|
|
IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count"));
|
|
|
|
satype = key_proto2satype(d->sah->saidx.proto);
|
|
if (satype == 0)
|
|
goto msgfail;
|
|
|
|
m = key_setsadbmsg(SADB_DELETE, 0,
|
|
satype, 0, 0, d->refcnt - 1);
|
|
if (!m)
|
|
goto msgfail;
|
|
result = m;
|
|
|
|
/* set sadb_address for saidx's. */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
|
|
&d->sah->saidx.src.sa,
|
|
d->sah->saidx.src.sa.sa_len << 3,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!m)
|
|
goto msgfail;
|
|
m_cat(result, m);
|
|
|
|
/* set sadb_address for saidx's. */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
|
|
&d->sah->saidx.dst.sa,
|
|
d->sah->saidx.dst.sa.sa_len << 3,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!m)
|
|
goto msgfail;
|
|
m_cat(result, m);
|
|
|
|
/* create SA extension */
|
|
m = key_setsadbsa(d);
|
|
if (!m)
|
|
goto msgfail;
|
|
m_cat(result, m);
|
|
|
|
if (result->m_len < sizeof(struct sadb_msg)) {
|
|
result = m_pullup(result,
|
|
sizeof(struct sadb_msg));
|
|
if (result == NULL)
|
|
goto msgfail;
|
|
}
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
if (key_sendup_mbuf(NULL, result,
|
|
KEY_SENDUP_REGISTERED))
|
|
goto msgfail;
|
|
msgfail:
|
|
KEY_FREESAV(&d);
|
|
}
|
|
}
|
|
if (candidate) {
|
|
sa_addref(candidate);
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s cause refcnt++:%d SA:%p\n",
|
|
__func__, candidate->refcnt, candidate));
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
|
|
return candidate;
|
|
}
|
|
|
|
/*
|
|
* allocating a usable SA entry for a *INBOUND* packet.
|
|
* Must call key_freesav() later.
|
|
* OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
|
|
* NULL: not found, or error occured.
|
|
*
|
|
* In the comparison, no source address is used--for RFC2401 conformance.
|
|
* To quote, from section 4.1:
|
|
* A security association is uniquely identified by a triple consisting
|
|
* of a Security Parameter Index (SPI), an IP Destination Address, and a
|
|
* security protocol (AH or ESP) identifier.
|
|
* Note that, however, we do need to keep source address in IPsec SA.
|
|
* IKE specification and PF_KEY specification do assume that we
|
|
* keep source address in IPsec SA. We see a tricky situation here.
|
|
*/
|
|
struct secasvar *
|
|
key_allocsa(union sockaddr_union *dst, u_int proto, u_int32_t spi,
|
|
const char* where, int tag)
|
|
{
|
|
struct secashead *sah;
|
|
struct secasvar *sav;
|
|
u_int stateidx, arraysize, state;
|
|
const u_int *saorder_state_valid;
|
|
#ifdef IPSEC_NAT_T
|
|
int natt_chkport;
|
|
#endif
|
|
|
|
IPSEC_ASSERT(dst != NULL, ("null dst address"));
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s from %s:%u\n", __func__, where, tag));
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
natt_chkport = (dst->sa.sa_family == AF_INET &&
|
|
dst->sa.sa_len == sizeof(struct sockaddr_in) &&
|
|
dst->sin.sin_port != 0);
|
|
#endif
|
|
|
|
/*
|
|
* searching SAD.
|
|
* XXX: to be checked internal IP header somewhere. Also when
|
|
* IPsec tunnel packet is received. But ESP tunnel mode is
|
|
* encrypted so we can't check internal IP header.
|
|
*/
|
|
SAHTREE_LOCK();
|
|
if (V_key_preferred_oldsa) {
|
|
saorder_state_valid = saorder_state_valid_prefer_old;
|
|
arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
|
|
} else {
|
|
saorder_state_valid = saorder_state_valid_prefer_new;
|
|
arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
|
|
}
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
int checkport;
|
|
|
|
/* search valid state */
|
|
for (stateidx = 0; stateidx < arraysize; stateidx++) {
|
|
state = saorder_state_valid[stateidx];
|
|
LIST_FOREACH(sav, &sah->savtree[state], chain) {
|
|
/* sanity check */
|
|
KEY_CHKSASTATE(sav->state, state, __func__);
|
|
/* do not return entries w/ unusable state */
|
|
if (sav->state != SADB_SASTATE_MATURE &&
|
|
sav->state != SADB_SASTATE_DYING)
|
|
continue;
|
|
if (proto != sav->sah->saidx.proto)
|
|
continue;
|
|
if (spi != sav->spi)
|
|
continue;
|
|
checkport = 0;
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Really only check ports when this is a NAT-T
|
|
* SA. Otherwise other lookups providing ports
|
|
* might suffer.
|
|
*/
|
|
if (sav->natt_type && natt_chkport)
|
|
checkport = 1;
|
|
#endif
|
|
#if 0 /* don't check src */
|
|
/* check src address */
|
|
if (key_sockaddrcmp(&src->sa,
|
|
&sav->sah->saidx.src.sa, checkport) != 0)
|
|
continue;
|
|
#endif
|
|
/* check dst address */
|
|
if (key_sockaddrcmp(&dst->sa,
|
|
&sav->sah->saidx.dst.sa, checkport) != 0)
|
|
continue;
|
|
sa_addref(sav);
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
sav = NULL;
|
|
done:
|
|
SAHTREE_UNLOCK();
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s return SA:%p; refcnt %u\n", __func__,
|
|
sav, sav ? sav->refcnt : 0));
|
|
return sav;
|
|
}
|
|
|
|
/*
|
|
* Must be called after calling key_allocsp().
|
|
* For both the packet without socket and key_freeso().
|
|
*/
|
|
void
|
|
_key_freesp(struct secpolicy **spp, const char* where, int tag)
|
|
{
|
|
struct ipsecrequest *isr, *nextisr;
|
|
struct secpolicy *sp = *spp;
|
|
|
|
IPSEC_ASSERT(sp != NULL, ("null sp"));
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n",
|
|
__func__, sp, sp->id, where, tag, sp->refcnt));
|
|
|
|
if (SP_DELREF(sp) == 0)
|
|
return;
|
|
*spp = NULL;
|
|
for (isr = sp->req; isr != NULL; isr = nextisr) {
|
|
if (isr->sav != NULL) {
|
|
KEY_FREESAV(&isr->sav);
|
|
isr->sav = NULL;
|
|
}
|
|
nextisr = isr->next;
|
|
ipsec_delisr(isr);
|
|
}
|
|
free(sp, M_IPSEC_SP);
|
|
}
|
|
|
|
static void
|
|
key_unlink(struct secpolicy *sp)
|
|
{
|
|
|
|
IPSEC_ASSERT(sp != NULL, ("null sp"));
|
|
IPSEC_ASSERT(sp->spidx.dir == IPSEC_DIR_INBOUND ||
|
|
sp->spidx.dir == IPSEC_DIR_OUTBOUND,
|
|
("invalid direction %u", sp->spidx.dir));
|
|
SPTREE_UNLOCK_ASSERT();
|
|
|
|
SPTREE_WLOCK();
|
|
if (sp->state == IPSEC_SPSTATE_DEAD) {
|
|
SPTREE_WUNLOCK();
|
|
return;
|
|
}
|
|
sp->state = IPSEC_SPSTATE_DEAD;
|
|
TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain);
|
|
SPTREE_WUNLOCK();
|
|
KEY_FREESP(&sp);
|
|
}
|
|
|
|
/*
|
|
* Must be called after calling key_allocsp().
|
|
* For the packet with socket.
|
|
*/
|
|
void
|
|
key_freeso(struct socket *so)
|
|
{
|
|
IPSEC_ASSERT(so != NULL, ("null so"));
|
|
|
|
switch (so->so_proto->pr_domain->dom_family) {
|
|
#if defined(INET) || defined(INET6)
|
|
#ifdef INET
|
|
case PF_INET:
|
|
#endif
|
|
#ifdef INET6
|
|
case PF_INET6:
|
|
#endif
|
|
{
|
|
struct inpcb *pcb = sotoinpcb(so);
|
|
|
|
/* Does it have a PCB ? */
|
|
if (pcb == NULL)
|
|
return;
|
|
key_freesp_so(&pcb->inp_sp->sp_in);
|
|
key_freesp_so(&pcb->inp_sp->sp_out);
|
|
}
|
|
break;
|
|
#endif /* INET || INET6 */
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n",
|
|
__func__, so->so_proto->pr_domain->dom_family));
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
key_freesp_so(struct secpolicy **sp)
|
|
{
|
|
IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp"));
|
|
|
|
if ((*sp)->policy == IPSEC_POLICY_ENTRUST ||
|
|
(*sp)->policy == IPSEC_POLICY_BYPASS)
|
|
return;
|
|
|
|
IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC,
|
|
("invalid policy %u", (*sp)->policy));
|
|
KEY_FREESP(sp);
|
|
}
|
|
|
|
void
|
|
key_addrefsa(struct secasvar *sav, const char* where, int tag)
|
|
{
|
|
|
|
IPSEC_ASSERT(sav != NULL, ("null sav"));
|
|
IPSEC_ASSERT(sav->refcnt > 0, ("refcount must exist"));
|
|
|
|
sa_addref(sav);
|
|
}
|
|
|
|
/*
|
|
* Must be called after calling key_allocsa().
|
|
* This function is called by key_freesp() to free some SA allocated
|
|
* for a policy.
|
|
*/
|
|
void
|
|
key_freesav(struct secasvar **psav, const char* where, int tag)
|
|
{
|
|
struct secasvar *sav = *psav;
|
|
|
|
IPSEC_ASSERT(sav != NULL, ("null sav"));
|
|
|
|
if (sa_delref(sav)) {
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n",
|
|
__func__, sav, ntohl(sav->spi), where, tag, sav->refcnt));
|
|
*psav = NULL;
|
|
key_delsav(sav);
|
|
} else {
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n",
|
|
__func__, sav, ntohl(sav->spi), where, tag, sav->refcnt));
|
|
}
|
|
}
|
|
|
|
/* %%% SPD management */
|
|
/*
|
|
* search SPD
|
|
* OUT: NULL : not found
|
|
* others : found, pointer to a SP.
|
|
*/
|
|
static struct secpolicy *
|
|
key_getsp(struct secpolicyindex *spidx)
|
|
{
|
|
SPTREE_RLOCK_TRACKER;
|
|
struct secpolicy *sp;
|
|
|
|
IPSEC_ASSERT(spidx != NULL, ("null spidx"));
|
|
|
|
SPTREE_RLOCK();
|
|
TAILQ_FOREACH(sp, &V_sptree[spidx->dir], chain) {
|
|
if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
|
|
SP_ADDREF(sp);
|
|
break;
|
|
}
|
|
}
|
|
SPTREE_RUNLOCK();
|
|
|
|
return sp;
|
|
}
|
|
|
|
/*
|
|
* get SP by index.
|
|
* OUT: NULL : not found
|
|
* others : found, pointer to a SP.
|
|
*/
|
|
static struct secpolicy *
|
|
key_getspbyid(u_int32_t id)
|
|
{
|
|
SPTREE_RLOCK_TRACKER;
|
|
struct secpolicy *sp;
|
|
|
|
SPTREE_RLOCK();
|
|
TAILQ_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) {
|
|
if (sp->id == id) {
|
|
SP_ADDREF(sp);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
TAILQ_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) {
|
|
if (sp->id == id) {
|
|
SP_ADDREF(sp);
|
|
goto done;
|
|
}
|
|
}
|
|
done:
|
|
SPTREE_RUNLOCK();
|
|
|
|
return sp;
|
|
}
|
|
|
|
struct secpolicy *
|
|
key_newsp(const char* where, int tag)
|
|
{
|
|
struct secpolicy *newsp = NULL;
|
|
|
|
newsp = (struct secpolicy *)
|
|
malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO);
|
|
if (newsp)
|
|
refcount_init(&newsp->refcnt, 1);
|
|
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s from %s:%u return SP:%p\n", __func__,
|
|
where, tag, newsp));
|
|
return newsp;
|
|
}
|
|
|
|
/*
|
|
* create secpolicy structure from sadb_x_policy structure.
|
|
* NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
|
|
* so must be set properly later.
|
|
*/
|
|
struct secpolicy *
|
|
key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
|
|
{
|
|
struct secpolicy *newsp;
|
|
|
|
IPSEC_ASSERT(xpl0 != NULL, ("null xpl0"));
|
|
IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len));
|
|
|
|
if (len != PFKEY_EXTLEN(xpl0)) {
|
|
ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__));
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
if ((newsp = KEY_NEWSP()) == NULL) {
|
|
*error = ENOBUFS;
|
|
return NULL;
|
|
}
|
|
|
|
newsp->spidx.dir = xpl0->sadb_x_policy_dir;
|
|
newsp->policy = xpl0->sadb_x_policy_type;
|
|
|
|
/* check policy */
|
|
switch (xpl0->sadb_x_policy_type) {
|
|
case IPSEC_POLICY_DISCARD:
|
|
case IPSEC_POLICY_NONE:
|
|
case IPSEC_POLICY_ENTRUST:
|
|
case IPSEC_POLICY_BYPASS:
|
|
newsp->req = NULL;
|
|
break;
|
|
|
|
case IPSEC_POLICY_IPSEC:
|
|
{
|
|
int tlen;
|
|
struct sadb_x_ipsecrequest *xisr;
|
|
struct ipsecrequest **p_isr = &newsp->req;
|
|
|
|
/* validity check */
|
|
if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
|
|
ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n",
|
|
__func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
|
|
xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
|
|
|
|
while (tlen > 0) {
|
|
/* length check */
|
|
if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest "
|
|
"length.\n", __func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
/* allocate request buffer */
|
|
/* NB: data structure is zero'd */
|
|
*p_isr = ipsec_newisr();
|
|
if ((*p_isr) == NULL) {
|
|
ipseclog((LOG_DEBUG,
|
|
"%s: No more memory.\n", __func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = ENOBUFS;
|
|
return NULL;
|
|
}
|
|
|
|
/* set values */
|
|
switch (xisr->sadb_x_ipsecrequest_proto) {
|
|
case IPPROTO_ESP:
|
|
case IPPROTO_AH:
|
|
case IPPROTO_IPCOMP:
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG,
|
|
"%s: invalid proto type=%u\n", __func__,
|
|
xisr->sadb_x_ipsecrequest_proto));
|
|
KEY_FREESP(&newsp);
|
|
*error = EPROTONOSUPPORT;
|
|
return NULL;
|
|
}
|
|
(*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
|
|
|
|
switch (xisr->sadb_x_ipsecrequest_mode) {
|
|
case IPSEC_MODE_TRANSPORT:
|
|
case IPSEC_MODE_TUNNEL:
|
|
break;
|
|
case IPSEC_MODE_ANY:
|
|
default:
|
|
ipseclog((LOG_DEBUG,
|
|
"%s: invalid mode=%u\n", __func__,
|
|
xisr->sadb_x_ipsecrequest_mode));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
(*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
|
|
|
|
switch (xisr->sadb_x_ipsecrequest_level) {
|
|
case IPSEC_LEVEL_DEFAULT:
|
|
case IPSEC_LEVEL_USE:
|
|
case IPSEC_LEVEL_REQUIRE:
|
|
break;
|
|
case IPSEC_LEVEL_UNIQUE:
|
|
/* validity check */
|
|
/*
|
|
* If range violation of reqid, kernel will
|
|
* update it, don't refuse it.
|
|
*/
|
|
if (xisr->sadb_x_ipsecrequest_reqid
|
|
> IPSEC_MANUAL_REQID_MAX) {
|
|
ipseclog((LOG_DEBUG,
|
|
"%s: reqid=%d range "
|
|
"violation, updated by kernel.\n",
|
|
__func__,
|
|
xisr->sadb_x_ipsecrequest_reqid));
|
|
xisr->sadb_x_ipsecrequest_reqid = 0;
|
|
}
|
|
|
|
/* allocate new reqid id if reqid is zero. */
|
|
if (xisr->sadb_x_ipsecrequest_reqid == 0) {
|
|
u_int32_t reqid;
|
|
if ((reqid = key_newreqid()) == 0) {
|
|
KEY_FREESP(&newsp);
|
|
*error = ENOBUFS;
|
|
return NULL;
|
|
}
|
|
(*p_isr)->saidx.reqid = reqid;
|
|
xisr->sadb_x_ipsecrequest_reqid = reqid;
|
|
} else {
|
|
/* set it for manual keying. */
|
|
(*p_isr)->saidx.reqid =
|
|
xisr->sadb_x_ipsecrequest_reqid;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: invalid level=%u\n",
|
|
__func__,
|
|
xisr->sadb_x_ipsecrequest_level));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
(*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
|
|
|
|
/* set IP addresses if there */
|
|
if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
|
|
struct sockaddr *paddr;
|
|
|
|
paddr = (struct sockaddr *)(xisr + 1);
|
|
|
|
/* validity check */
|
|
if (paddr->sa_len
|
|
> sizeof((*p_isr)->saidx.src)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid "
|
|
"request address length.\n",
|
|
__func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
bcopy(paddr, &(*p_isr)->saidx.src,
|
|
paddr->sa_len);
|
|
|
|
paddr = (struct sockaddr *)((caddr_t)paddr
|
|
+ paddr->sa_len);
|
|
|
|
/* validity check */
|
|
if (paddr->sa_len
|
|
> sizeof((*p_isr)->saidx.dst)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid "
|
|
"request address length.\n",
|
|
__func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
bcopy(paddr, &(*p_isr)->saidx.dst,
|
|
paddr->sa_len);
|
|
}
|
|
|
|
(*p_isr)->sp = newsp;
|
|
|
|
/* initialization for the next. */
|
|
p_isr = &(*p_isr)->next;
|
|
tlen -= xisr->sadb_x_ipsecrequest_len;
|
|
|
|
/* validity check */
|
|
if (tlen < 0) {
|
|
ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n",
|
|
__func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
|
|
+ xisr->sadb_x_ipsecrequest_len);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
|
|
KEY_FREESP(&newsp);
|
|
*error = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
*error = 0;
|
|
return newsp;
|
|
}
|
|
|
|
static u_int32_t
|
|
key_newreqid()
|
|
{
|
|
static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
|
|
|
|
auto_reqid = (auto_reqid == ~0
|
|
? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
|
|
|
|
/* XXX should be unique check */
|
|
|
|
return auto_reqid;
|
|
}
|
|
|
|
/*
|
|
* copy secpolicy struct to sadb_x_policy structure indicated.
|
|
*/
|
|
struct mbuf *
|
|
key_sp2msg(struct secpolicy *sp)
|
|
{
|
|
struct sadb_x_policy *xpl;
|
|
int tlen;
|
|
caddr_t p;
|
|
struct mbuf *m;
|
|
|
|
IPSEC_ASSERT(sp != NULL, ("null policy"));
|
|
|
|
tlen = key_getspreqmsglen(sp);
|
|
|
|
m = m_get2(tlen, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, tlen);
|
|
m->m_len = tlen;
|
|
xpl = mtod(m, struct sadb_x_policy *);
|
|
bzero(xpl, tlen);
|
|
|
|
xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
|
|
xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
|
|
xpl->sadb_x_policy_type = sp->policy;
|
|
xpl->sadb_x_policy_dir = sp->spidx.dir;
|
|
xpl->sadb_x_policy_id = sp->id;
|
|
p = (caddr_t)xpl + sizeof(*xpl);
|
|
|
|
/* if is the policy for ipsec ? */
|
|
if (sp->policy == IPSEC_POLICY_IPSEC) {
|
|
struct sadb_x_ipsecrequest *xisr;
|
|
struct ipsecrequest *isr;
|
|
|
|
for (isr = sp->req; isr != NULL; isr = isr->next) {
|
|
|
|
xisr = (struct sadb_x_ipsecrequest *)p;
|
|
|
|
xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
|
|
xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
|
|
xisr->sadb_x_ipsecrequest_level = isr->level;
|
|
xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
|
|
|
|
p += sizeof(*xisr);
|
|
bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len);
|
|
p += isr->saidx.src.sa.sa_len;
|
|
bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len);
|
|
p += isr->saidx.src.sa.sa_len;
|
|
|
|
xisr->sadb_x_ipsecrequest_len =
|
|
PFKEY_ALIGN8(sizeof(*xisr)
|
|
+ isr->saidx.src.sa.sa_len
|
|
+ isr->saidx.dst.sa.sa_len);
|
|
}
|
|
}
|
|
|
|
return m;
|
|
}
|
|
|
|
/* m will not be freed nor modified */
|
|
static struct mbuf *
|
|
key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
|
|
int ndeep, int nitem, ...)
|
|
{
|
|
va_list ap;
|
|
int idx;
|
|
int i;
|
|
struct mbuf *result = NULL, *n;
|
|
int len;
|
|
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
|
|
va_start(ap, nitem);
|
|
for (i = 0; i < nitem; i++) {
|
|
idx = va_arg(ap, int);
|
|
if (idx < 0 || idx > SADB_EXT_MAX)
|
|
goto fail;
|
|
/* don't attempt to pull empty extension */
|
|
if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
|
|
continue;
|
|
if (idx != SADB_EXT_RESERVED &&
|
|
(mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
|
|
continue;
|
|
|
|
if (idx == SADB_EXT_RESERVED) {
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
|
|
IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len));
|
|
|
|
MGETHDR(n, M_NOWAIT, MT_DATA);
|
|
if (!n)
|
|
goto fail;
|
|
n->m_len = len;
|
|
n->m_next = NULL;
|
|
m_copydata(m, 0, sizeof(struct sadb_msg),
|
|
mtod(n, caddr_t));
|
|
} else if (i < ndeep) {
|
|
len = mhp->extlen[idx];
|
|
n = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (n == NULL)
|
|
goto fail;
|
|
m_align(n, len);
|
|
n->m_len = len;
|
|
m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
|
|
mtod(n, caddr_t));
|
|
} else {
|
|
n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
|
|
M_NOWAIT);
|
|
}
|
|
if (n == NULL)
|
|
goto fail;
|
|
|
|
if (result)
|
|
m_cat(result, n);
|
|
else
|
|
result = n;
|
|
}
|
|
va_end(ap);
|
|
|
|
if ((result->m_flags & M_PKTHDR) != 0) {
|
|
result->m_pkthdr.len = 0;
|
|
for (n = result; n; n = n->m_next)
|
|
result->m_pkthdr.len += n->m_len;
|
|
}
|
|
|
|
return result;
|
|
|
|
fail:
|
|
m_freem(result);
|
|
va_end(ap);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
|
|
* add an entry to SP database, when received
|
|
* <base, address(SD), (lifetime(H),) policy>
|
|
* from the user(?).
|
|
* Adding to SP database,
|
|
* and send
|
|
* <base, address(SD), (lifetime(H),) policy>
|
|
* to the socket which was send.
|
|
*
|
|
* SPDADD set a unique policy entry.
|
|
* SPDSETIDX like SPDADD without a part of policy requests.
|
|
* SPDUPDATE replace a unique policy entry.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_address *src0, *dst0;
|
|
struct sadb_x_policy *xpl0, *xpl;
|
|
struct sadb_lifetime *lft = NULL;
|
|
struct secpolicyindex spidx;
|
|
struct secpolicy *newsp;
|
|
int error;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
|
|
mhp->ext[SADB_X_EXT_POLICY] == NULL) {
|
|
ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
|
|
if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
|
|
< sizeof(struct sadb_lifetime)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
|
|
}
|
|
|
|
src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
|
|
dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
|
|
xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
|
|
|
|
/*
|
|
* Note: do not parse SADB_X_EXT_NAT_T_* here:
|
|
* we are processing traffic endpoints.
|
|
*/
|
|
|
|
/* make secindex */
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
|
|
src0 + 1,
|
|
dst0 + 1,
|
|
src0->sadb_address_prefixlen,
|
|
dst0->sadb_address_prefixlen,
|
|
src0->sadb_address_proto,
|
|
&spidx);
|
|
|
|
/* checking the direciton. */
|
|
switch (xpl0->sadb_x_policy_dir) {
|
|
case IPSEC_DIR_INBOUND:
|
|
case IPSEC_DIR_OUTBOUND:
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__));
|
|
mhp->msg->sadb_msg_errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
/* check policy */
|
|
/* key_spdadd() accepts DISCARD, NONE and IPSEC. */
|
|
if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
|
|
|| xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
|
|
ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* policy requests are mandatory when action is ipsec. */
|
|
if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
|
|
&& xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
|
|
&& mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
|
|
ipseclog((LOG_DEBUG, "%s: some policy requests part required\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/*
|
|
* checking there is SP already or not.
|
|
* SPDUPDATE doesn't depend on whether there is a SP or not.
|
|
* If the type is either SPDADD or SPDSETIDX AND a SP is found,
|
|
* then error.
|
|
*/
|
|
newsp = key_getsp(&spidx);
|
|
if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
|
|
if (newsp) {
|
|
key_unlink(newsp);
|
|
KEY_FREESP(&newsp);
|
|
}
|
|
} else {
|
|
if (newsp != NULL) {
|
|
KEY_FREESP(&newsp);
|
|
ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EEXIST);
|
|
}
|
|
}
|
|
|
|
/* XXX: there is race between key_getsp and key_msg2sp. */
|
|
|
|
/* allocation new SP entry */
|
|
if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
if ((newsp->id = key_getnewspid()) == 0) {
|
|
KEY_FREESP(&newsp);
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
|
|
src0 + 1,
|
|
dst0 + 1,
|
|
src0->sadb_address_prefixlen,
|
|
dst0->sadb_address_prefixlen,
|
|
src0->sadb_address_proto,
|
|
&newsp->spidx);
|
|
|
|
/* sanity check on addr pair */
|
|
if (((struct sockaddr *)(src0 + 1))->sa_family !=
|
|
((struct sockaddr *)(dst0+ 1))->sa_family) {
|
|
KEY_FREESP(&newsp);
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (((struct sockaddr *)(src0 + 1))->sa_len !=
|
|
((struct sockaddr *)(dst0+ 1))->sa_len) {
|
|
KEY_FREESP(&newsp);
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
#if 1
|
|
if (newsp->req && newsp->req->saidx.src.sa.sa_family &&
|
|
newsp->req->saidx.dst.sa.sa_family) {
|
|
if (newsp->req->saidx.src.sa.sa_family !=
|
|
newsp->req->saidx.dst.sa.sa_family) {
|
|
KEY_FREESP(&newsp);
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
newsp->created = time_second;
|
|
newsp->lastused = newsp->created;
|
|
newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
|
|
newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
|
|
|
|
SPTREE_WLOCK();
|
|
TAILQ_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, chain);
|
|
newsp->state = IPSEC_SPSTATE_ALIVE;
|
|
SPTREE_WUNLOCK();
|
|
|
|
/* delete the entry in spacqtree */
|
|
if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
|
|
struct secspacq *spacq = key_getspacq(&spidx);
|
|
if (spacq != NULL) {
|
|
/* reset counter in order to deletion by timehandler. */
|
|
spacq->created = time_second;
|
|
spacq->count = 0;
|
|
SPACQ_UNLOCK();
|
|
}
|
|
}
|
|
|
|
{
|
|
struct mbuf *n, *mpolicy;
|
|
struct sadb_msg *newmsg;
|
|
int off;
|
|
|
|
/*
|
|
* Note: do not send SADB_X_EXT_NAT_T_* here:
|
|
* we are sending traffic endpoints.
|
|
*/
|
|
|
|
/* create new sadb_msg to reply. */
|
|
if (lft) {
|
|
n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
|
|
SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
|
|
SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
|
|
} else {
|
|
n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
|
|
SADB_X_EXT_POLICY,
|
|
SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
|
|
}
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
if (n->m_len < sizeof(*newmsg)) {
|
|
n = m_pullup(n, sizeof(*newmsg));
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
off = 0;
|
|
mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
|
|
sizeof(*xpl), &off);
|
|
if (mpolicy == NULL) {
|
|
/* n is already freed */
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
|
|
if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
|
|
m_freem(n);
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
xpl->sadb_x_policy_id = newsp->id;
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* get new policy id.
|
|
* OUT:
|
|
* 0: failure.
|
|
* others: success.
|
|
*/
|
|
static u_int32_t
|
|
key_getnewspid()
|
|
{
|
|
u_int32_t newid = 0;
|
|
int count = V_key_spi_trycnt; /* XXX */
|
|
struct secpolicy *sp;
|
|
|
|
/* when requesting to allocate spi ranged */
|
|
while (count--) {
|
|
newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1));
|
|
|
|
if ((sp = key_getspbyid(newid)) == NULL)
|
|
break;
|
|
|
|
KEY_FREESP(&sp);
|
|
}
|
|
|
|
if (count == 0 || newid == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n",
|
|
__func__));
|
|
return 0;
|
|
}
|
|
|
|
return newid;
|
|
}
|
|
|
|
/*
|
|
* SADB_SPDDELETE processing
|
|
* receive
|
|
* <base, address(SD), policy(*)>
|
|
* from the user(?), and set SADB_SASTATE_DEAD,
|
|
* and send,
|
|
* <base, address(SD), policy(*)>
|
|
* to the ikmpd.
|
|
* policy(*) including direction of policy.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_spddelete(struct socket *so, struct mbuf *m,
|
|
const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_address *src0, *dst0;
|
|
struct sadb_x_policy *xpl0;
|
|
struct secpolicyindex spidx;
|
|
struct secpolicy *sp;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null so"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
|
|
mhp->ext[SADB_X_EXT_POLICY] == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
|
|
dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
|
|
xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
|
|
|
|
/*
|
|
* Note: do not parse SADB_X_EXT_NAT_T_* here:
|
|
* we are processing traffic endpoints.
|
|
*/
|
|
|
|
/* make secindex */
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
|
|
src0 + 1,
|
|
dst0 + 1,
|
|
src0->sadb_address_prefixlen,
|
|
dst0->sadb_address_prefixlen,
|
|
src0->sadb_address_proto,
|
|
&spidx);
|
|
|
|
/* checking the direciton. */
|
|
switch (xpl0->sadb_x_policy_dir) {
|
|
case IPSEC_DIR_INBOUND:
|
|
case IPSEC_DIR_OUTBOUND:
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* Is there SP in SPD ? */
|
|
if ((sp = key_getsp(&spidx)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* save policy id to buffer to be returned. */
|
|
xpl0->sadb_x_policy_id = sp->id;
|
|
|
|
key_unlink(sp);
|
|
KEY_FREESP(&sp);
|
|
|
|
{
|
|
struct mbuf *n;
|
|
struct sadb_msg *newmsg;
|
|
|
|
/*
|
|
* Note: do not send SADB_X_EXT_NAT_T_* here:
|
|
* we are sending traffic endpoints.
|
|
*/
|
|
|
|
/* create new sadb_msg to reply. */
|
|
n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
|
|
SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* SADB_SPDDELETE2 processing
|
|
* receive
|
|
* <base, policy(*)>
|
|
* from the user(?), and set SADB_SASTATE_DEAD,
|
|
* and send,
|
|
* <base, policy(*)>
|
|
* to the ikmpd.
|
|
* policy(*) including direction of policy.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_spddelete2(struct socket *so, struct mbuf *m,
|
|
const struct sadb_msghdr *mhp)
|
|
{
|
|
u_int32_t id;
|
|
struct secpolicy *sp;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
|
|
mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
|
|
|
|
/* Is there SP in SPD ? */
|
|
if ((sp = key_getspbyid(id)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
key_unlink(sp);
|
|
KEY_FREESP(&sp);
|
|
|
|
{
|
|
struct mbuf *n, *nn;
|
|
struct sadb_msg *newmsg;
|
|
int off, len;
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
|
|
MGETHDR(n, M_NOWAIT, MT_DATA);
|
|
if (n && len > MHLEN) {
|
|
if (!(MCLGET(n, M_NOWAIT))) {
|
|
m_freem(n);
|
|
n = NULL;
|
|
}
|
|
}
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
n->m_len = len;
|
|
n->m_next = NULL;
|
|
off = 0;
|
|
|
|
m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
|
|
off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
|
|
IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)",
|
|
off, len));
|
|
|
|
n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
|
|
mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT);
|
|
if (!n->m_next) {
|
|
m_freem(n);
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
n->m_pkthdr.len = 0;
|
|
for (nn = n; nn; nn = nn->m_next)
|
|
n->m_pkthdr.len += nn->m_len;
|
|
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* SADB_X_SPDGET processing
|
|
* receive
|
|
* <base, policy(*)>
|
|
* from the user(?),
|
|
* and send,
|
|
* <base, address(SD), policy>
|
|
* to the ikmpd.
|
|
* policy(*) including direction of policy.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_spdget(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
u_int32_t id;
|
|
struct secpolicy *sp;
|
|
struct mbuf *n;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
|
|
mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
|
|
|
|
/* Is there SP in SPD ? */
|
|
if ((sp = key_getspbyid(id)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id));
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
|
|
n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq,
|
|
mhp->msg->sadb_msg_pid);
|
|
KEY_FREESP(&sp);
|
|
if (n != NULL) {
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
|
|
} else
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
/*
|
|
* SADB_X_SPDACQUIRE processing.
|
|
* Acquire policy and SA(s) for a *OUTBOUND* packet.
|
|
* send
|
|
* <base, policy(*)>
|
|
* to KMD, and expect to receive
|
|
* <base> with SADB_X_SPDACQUIRE if error occured,
|
|
* or
|
|
* <base, policy>
|
|
* with SADB_X_SPDUPDATE from KMD by PF_KEY.
|
|
* policy(*) is without policy requests.
|
|
*
|
|
* 0 : succeed
|
|
* others: error number
|
|
*/
|
|
int
|
|
key_spdacquire(struct secpolicy *sp)
|
|
{
|
|
struct mbuf *result = NULL, *m;
|
|
struct secspacq *newspacq;
|
|
|
|
IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
|
|
IPSEC_ASSERT(sp->req == NULL, ("policy exists"));
|
|
IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC,
|
|
("policy not IPSEC %u", sp->policy));
|
|
|
|
/* Get an entry to check whether sent message or not. */
|
|
newspacq = key_getspacq(&sp->spidx);
|
|
if (newspacq != NULL) {
|
|
if (V_key_blockacq_count < newspacq->count) {
|
|
/* reset counter and do send message. */
|
|
newspacq->count = 0;
|
|
} else {
|
|
/* increment counter and do nothing. */
|
|
newspacq->count++;
|
|
SPACQ_UNLOCK();
|
|
return (0);
|
|
}
|
|
SPACQ_UNLOCK();
|
|
} else {
|
|
/* make new entry for blocking to send SADB_ACQUIRE. */
|
|
newspacq = key_newspacq(&sp->spidx);
|
|
if (newspacq == NULL)
|
|
return ENOBUFS;
|
|
}
|
|
|
|
/* create new sadb_msg to reply. */
|
|
m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
|
|
if (!m)
|
|
return ENOBUFS;
|
|
|
|
result = m;
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
|
|
}
|
|
|
|
/*
|
|
* SADB_SPDFLUSH processing
|
|
* receive
|
|
* <base>
|
|
* from the user, and free all entries in secpctree.
|
|
* and send,
|
|
* <base>
|
|
* to the user.
|
|
* NOTE: what to do is only marking SADB_SASTATE_DEAD.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_spdflush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
TAILQ_HEAD(, secpolicy) drainq;
|
|
struct sadb_msg *newmsg;
|
|
struct secpolicy *sp, *nextsp;
|
|
u_int dir;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
|
|
return key_senderror(so, m, EINVAL);
|
|
|
|
TAILQ_INIT(&drainq);
|
|
SPTREE_WLOCK();
|
|
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
|
|
TAILQ_CONCAT(&drainq, &V_sptree[dir], chain);
|
|
}
|
|
/*
|
|
* We need to set state to DEAD for each policy to be sure,
|
|
* that another thread won't try to unlink it.
|
|
*/
|
|
TAILQ_FOREACH(sp, &drainq, chain)
|
|
sp->state = IPSEC_SPSTATE_DEAD;
|
|
SPTREE_WUNLOCK();
|
|
sp = TAILQ_FIRST(&drainq);
|
|
while (sp != NULL) {
|
|
nextsp = TAILQ_NEXT(sp, chain);
|
|
KEY_FREESP(&sp);
|
|
sp = nextsp;
|
|
}
|
|
|
|
if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
if (m->m_next)
|
|
m_freem(m->m_next);
|
|
m->m_next = NULL;
|
|
m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
newmsg = mtod(m, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
|
|
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
|
|
}
|
|
|
|
/*
|
|
* SADB_SPDDUMP processing
|
|
* receive
|
|
* <base>
|
|
* from the user, and dump all SP leaves
|
|
* and send,
|
|
* <base> .....
|
|
* to the ikmpd.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_spddump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
SPTREE_RLOCK_TRACKER;
|
|
struct secpolicy *sp;
|
|
int cnt;
|
|
u_int dir;
|
|
struct mbuf *n;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* search SPD entry and get buffer size. */
|
|
cnt = 0;
|
|
SPTREE_RLOCK();
|
|
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
|
|
TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
|
|
cnt++;
|
|
}
|
|
}
|
|
|
|
if (cnt == 0) {
|
|
SPTREE_RUNLOCK();
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
|
|
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
|
|
TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
|
|
--cnt;
|
|
n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
|
|
mhp->msg->sadb_msg_pid);
|
|
|
|
if (n)
|
|
key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
|
|
}
|
|
}
|
|
|
|
SPTREE_RUNLOCK();
|
|
m_freem(m);
|
|
return 0;
|
|
}
|
|
|
|
static struct mbuf *
|
|
key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
|
|
u_int32_t pid)
|
|
{
|
|
struct mbuf *result = NULL, *m;
|
|
struct seclifetime lt;
|
|
|
|
m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
|
|
if (!m)
|
|
goto fail;
|
|
result = m;
|
|
|
|
/*
|
|
* Note: do not send SADB_X_EXT_NAT_T_* here:
|
|
* we are sending traffic endpoints.
|
|
*/
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
|
|
&sp->spidx.src.sa, sp->spidx.prefs,
|
|
sp->spidx.ul_proto);
|
|
if (!m)
|
|
goto fail;
|
|
m_cat(result, m);
|
|
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
|
|
&sp->spidx.dst.sa, sp->spidx.prefd,
|
|
sp->spidx.ul_proto);
|
|
if (!m)
|
|
goto fail;
|
|
m_cat(result, m);
|
|
|
|
m = key_sp2msg(sp);
|
|
if (!m)
|
|
goto fail;
|
|
m_cat(result, m);
|
|
|
|
if(sp->lifetime){
|
|
lt.addtime=sp->created;
|
|
lt.usetime= sp->lastused;
|
|
m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT);
|
|
if (!m)
|
|
goto fail;
|
|
m_cat(result, m);
|
|
|
|
lt.addtime=sp->lifetime;
|
|
lt.usetime= sp->validtime;
|
|
m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD);
|
|
if (!m)
|
|
goto fail;
|
|
m_cat(result, m);
|
|
}
|
|
|
|
if ((result->m_flags & M_PKTHDR) == 0)
|
|
goto fail;
|
|
|
|
if (result->m_len < sizeof(struct sadb_msg)) {
|
|
result = m_pullup(result, sizeof(struct sadb_msg));
|
|
if (result == NULL)
|
|
goto fail;
|
|
}
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
return result;
|
|
|
|
fail:
|
|
m_freem(result);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* get PFKEY message length for security policy and request.
|
|
*/
|
|
static u_int
|
|
key_getspreqmsglen(struct secpolicy *sp)
|
|
{
|
|
u_int tlen;
|
|
|
|
tlen = sizeof(struct sadb_x_policy);
|
|
|
|
/* if is the policy for ipsec ? */
|
|
if (sp->policy != IPSEC_POLICY_IPSEC)
|
|
return tlen;
|
|
|
|
/* get length of ipsec requests */
|
|
{
|
|
struct ipsecrequest *isr;
|
|
int len;
|
|
|
|
for (isr = sp->req; isr != NULL; isr = isr->next) {
|
|
len = sizeof(struct sadb_x_ipsecrequest)
|
|
+ isr->saidx.src.sa.sa_len
|
|
+ isr->saidx.dst.sa.sa_len;
|
|
|
|
tlen += PFKEY_ALIGN8(len);
|
|
}
|
|
}
|
|
|
|
return tlen;
|
|
}
|
|
|
|
/*
|
|
* SADB_SPDEXPIRE processing
|
|
* send
|
|
* <base, address(SD), lifetime(CH), policy>
|
|
* to KMD by PF_KEY.
|
|
*
|
|
* OUT: 0 : succeed
|
|
* others : error number
|
|
*/
|
|
static int
|
|
key_spdexpire(struct secpolicy *sp)
|
|
{
|
|
struct mbuf *result = NULL, *m;
|
|
int len;
|
|
int error = -1;
|
|
struct sadb_lifetime *lt;
|
|
|
|
/* XXX: Why do we lock ? */
|
|
|
|
IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
|
|
|
|
/* set msg header */
|
|
m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
result = m;
|
|
|
|
/* create lifetime extension (current and hard) */
|
|
len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
bzero(mtod(m, caddr_t), len);
|
|
lt = mtod(m, struct sadb_lifetime *);
|
|
lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
|
|
lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
|
|
lt->sadb_lifetime_allocations = 0;
|
|
lt->sadb_lifetime_bytes = 0;
|
|
lt->sadb_lifetime_addtime = sp->created;
|
|
lt->sadb_lifetime_usetime = sp->lastused;
|
|
lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
|
|
lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
|
|
lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
|
|
lt->sadb_lifetime_allocations = 0;
|
|
lt->sadb_lifetime_bytes = 0;
|
|
lt->sadb_lifetime_addtime = sp->lifetime;
|
|
lt->sadb_lifetime_usetime = sp->validtime;
|
|
m_cat(result, m);
|
|
|
|
/*
|
|
* Note: do not send SADB_X_EXT_NAT_T_* here:
|
|
* we are sending traffic endpoints.
|
|
*/
|
|
|
|
/* set sadb_address for source */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
|
|
&sp->spidx.src.sa,
|
|
sp->spidx.prefs, sp->spidx.ul_proto);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* set sadb_address for destination */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
|
|
&sp->spidx.dst.sa,
|
|
sp->spidx.prefd, sp->spidx.ul_proto);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* set secpolicy */
|
|
m = key_sp2msg(sp);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
if ((result->m_flags & M_PKTHDR) == 0) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
if (result->m_len < sizeof(struct sadb_msg)) {
|
|
result = m_pullup(result, sizeof(struct sadb_msg));
|
|
if (result == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
|
|
|
|
fail:
|
|
if (result)
|
|
m_freem(result);
|
|
return error;
|
|
}
|
|
|
|
/* %%% SAD management */
|
|
/*
|
|
* allocating a memory for new SA head, and copy from the values of mhp.
|
|
* OUT: NULL : failure due to the lack of memory.
|
|
* others : pointer to new SA head.
|
|
*/
|
|
static struct secashead *
|
|
key_newsah(struct secasindex *saidx)
|
|
{
|
|
struct secashead *newsah;
|
|
|
|
IPSEC_ASSERT(saidx != NULL, ("null saidx"));
|
|
|
|
newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO);
|
|
if (newsah != NULL) {
|
|
int i;
|
|
for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++)
|
|
LIST_INIT(&newsah->savtree[i]);
|
|
newsah->saidx = *saidx;
|
|
|
|
/* add to saidxtree */
|
|
newsah->state = SADB_SASTATE_MATURE;
|
|
|
|
SAHTREE_LOCK();
|
|
LIST_INSERT_HEAD(&V_sahtree, newsah, chain);
|
|
SAHTREE_UNLOCK();
|
|
}
|
|
return(newsah);
|
|
}
|
|
|
|
/*
|
|
* delete SA index and all SA registerd.
|
|
*/
|
|
static void
|
|
key_delsah(struct secashead *sah)
|
|
{
|
|
struct secasvar *sav, *nextsav;
|
|
u_int stateidx;
|
|
int zombie = 0;
|
|
|
|
IPSEC_ASSERT(sah != NULL, ("NULL sah"));
|
|
SAHTREE_LOCK_ASSERT();
|
|
|
|
/* searching all SA registerd in the secindex. */
|
|
for (stateidx = 0;
|
|
stateidx < _ARRAYLEN(saorder_state_any);
|
|
stateidx++) {
|
|
u_int state = saorder_state_any[stateidx];
|
|
LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) {
|
|
if (sav->refcnt == 0) {
|
|
/* sanity check */
|
|
KEY_CHKSASTATE(state, sav->state, __func__);
|
|
/*
|
|
* do NOT call KEY_FREESAV here:
|
|
* it will only delete the sav if refcnt == 1,
|
|
* where we already know that refcnt == 0
|
|
*/
|
|
key_delsav(sav);
|
|
} else {
|
|
/* give up to delete this sa */
|
|
zombie++;
|
|
}
|
|
}
|
|
}
|
|
if (!zombie) { /* delete only if there are savs */
|
|
/* remove from tree of SA index */
|
|
if (__LIST_CHAINED(sah))
|
|
LIST_REMOVE(sah, chain);
|
|
free(sah, M_IPSEC_SAH);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* allocating a new SA with LARVAL state. key_add() and key_getspi() call,
|
|
* and copy the values of mhp into new buffer.
|
|
* When SAD message type is GETSPI:
|
|
* to set sequence number from acq_seq++,
|
|
* to set zero to SPI.
|
|
* not to call key_setsava().
|
|
* OUT: NULL : fail
|
|
* others : pointer to new secasvar.
|
|
*
|
|
* does not modify mbuf. does not free mbuf on error.
|
|
*/
|
|
static struct secasvar *
|
|
key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
|
|
struct secashead *sah, int *errp, const char *where, int tag)
|
|
{
|
|
struct secasvar *newsav;
|
|
const struct sadb_sa *xsa;
|
|
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
IPSEC_ASSERT(sah != NULL, ("null secashead"));
|
|
|
|
newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO);
|
|
if (newsav == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
*errp = ENOBUFS;
|
|
goto done;
|
|
}
|
|
|
|
switch (mhp->msg->sadb_msg_type) {
|
|
case SADB_GETSPI:
|
|
newsav->spi = 0;
|
|
|
|
#ifdef IPSEC_DOSEQCHECK
|
|
/* sync sequence number */
|
|
if (mhp->msg->sadb_msg_seq == 0)
|
|
newsav->seq =
|
|
(V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq));
|
|
else
|
|
#endif
|
|
newsav->seq = mhp->msg->sadb_msg_seq;
|
|
break;
|
|
|
|
case SADB_ADD:
|
|
/* sanity check */
|
|
if (mhp->ext[SADB_EXT_SA] == NULL) {
|
|
free(newsav, M_IPSEC_SA);
|
|
newsav = NULL;
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
*errp = EINVAL;
|
|
goto done;
|
|
}
|
|
xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
|
|
newsav->spi = xsa->sadb_sa_spi;
|
|
newsav->seq = mhp->msg->sadb_msg_seq;
|
|
break;
|
|
default:
|
|
free(newsav, M_IPSEC_SA);
|
|
newsav = NULL;
|
|
*errp = EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
|
|
/* copy sav values */
|
|
if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
|
|
*errp = key_setsaval(newsav, m, mhp);
|
|
if (*errp) {
|
|
free(newsav, M_IPSEC_SA);
|
|
newsav = NULL;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
SECASVAR_LOCK_INIT(newsav);
|
|
|
|
/* reset created */
|
|
newsav->created = time_second;
|
|
newsav->pid = mhp->msg->sadb_msg_pid;
|
|
|
|
/* add to satree */
|
|
newsav->sah = sah;
|
|
sa_initref(newsav);
|
|
newsav->state = SADB_SASTATE_LARVAL;
|
|
|
|
SAHTREE_LOCK();
|
|
LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
|
|
secasvar, chain);
|
|
SAHTREE_UNLOCK();
|
|
done:
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s from %s:%u return SP:%p\n", __func__,
|
|
where, tag, newsav));
|
|
|
|
return newsav;
|
|
}
|
|
|
|
/*
|
|
* free() SA variable entry.
|
|
*/
|
|
static void
|
|
key_cleansav(struct secasvar *sav)
|
|
{
|
|
/*
|
|
* Cleanup xform state. Note that zeroize'ing causes the
|
|
* keys to be cleared; otherwise we must do it ourself.
|
|
*/
|
|
if (sav->tdb_xform != NULL) {
|
|
sav->tdb_xform->xf_zeroize(sav);
|
|
sav->tdb_xform = NULL;
|
|
} else {
|
|
KASSERT(sav->iv == NULL, ("iv but no xform"));
|
|
if (sav->key_auth != NULL)
|
|
bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth));
|
|
if (sav->key_enc != NULL)
|
|
bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc));
|
|
}
|
|
if (sav->key_auth != NULL) {
|
|
if (sav->key_auth->key_data != NULL)
|
|
free(sav->key_auth->key_data, M_IPSEC_MISC);
|
|
free(sav->key_auth, M_IPSEC_MISC);
|
|
sav->key_auth = NULL;
|
|
}
|
|
if (sav->key_enc != NULL) {
|
|
if (sav->key_enc->key_data != NULL)
|
|
free(sav->key_enc->key_data, M_IPSEC_MISC);
|
|
free(sav->key_enc, M_IPSEC_MISC);
|
|
sav->key_enc = NULL;
|
|
}
|
|
if (sav->sched) {
|
|
bzero(sav->sched, sav->schedlen);
|
|
free(sav->sched, M_IPSEC_MISC);
|
|
sav->sched = NULL;
|
|
}
|
|
if (sav->replay != NULL) {
|
|
free(sav->replay, M_IPSEC_MISC);
|
|
sav->replay = NULL;
|
|
}
|
|
if (sav->lft_c != NULL) {
|
|
free(sav->lft_c, M_IPSEC_MISC);
|
|
sav->lft_c = NULL;
|
|
}
|
|
if (sav->lft_h != NULL) {
|
|
free(sav->lft_h, M_IPSEC_MISC);
|
|
sav->lft_h = NULL;
|
|
}
|
|
if (sav->lft_s != NULL) {
|
|
free(sav->lft_s, M_IPSEC_MISC);
|
|
sav->lft_s = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* free() SA variable entry.
|
|
*/
|
|
static void
|
|
key_delsav(struct secasvar *sav)
|
|
{
|
|
IPSEC_ASSERT(sav != NULL, ("null sav"));
|
|
IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt));
|
|
|
|
/* remove from SA header */
|
|
if (__LIST_CHAINED(sav))
|
|
LIST_REMOVE(sav, chain);
|
|
key_cleansav(sav);
|
|
SECASVAR_LOCK_DESTROY(sav);
|
|
free(sav, M_IPSEC_SA);
|
|
}
|
|
|
|
/*
|
|
* search SAD.
|
|
* OUT:
|
|
* NULL : not found
|
|
* others : found, pointer to a SA.
|
|
*/
|
|
static struct secashead *
|
|
key_getsah(struct secasindex *saidx)
|
|
{
|
|
struct secashead *sah;
|
|
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (sah->state == SADB_SASTATE_DEAD)
|
|
continue;
|
|
if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
|
|
break;
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
|
|
return sah;
|
|
}
|
|
|
|
/*
|
|
* check not to be duplicated SPI.
|
|
* NOTE: this function is too slow due to searching all SAD.
|
|
* OUT:
|
|
* NULL : not found
|
|
* others : found, pointer to a SA.
|
|
*/
|
|
static struct secasvar *
|
|
key_checkspidup(struct secasindex *saidx, u_int32_t spi)
|
|
{
|
|
struct secashead *sah;
|
|
struct secasvar *sav;
|
|
|
|
/* check address family */
|
|
if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) {
|
|
ipseclog((LOG_DEBUG, "%s: address family mismatched.\n",
|
|
__func__));
|
|
return NULL;
|
|
}
|
|
|
|
sav = NULL;
|
|
/* check all SAD */
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
|
|
continue;
|
|
sav = key_getsavbyspi(sah, spi);
|
|
if (sav != NULL)
|
|
break;
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
|
|
return sav;
|
|
}
|
|
|
|
/*
|
|
* search SAD litmited alive SA, protocol, SPI.
|
|
* OUT:
|
|
* NULL : not found
|
|
* others : found, pointer to a SA.
|
|
*/
|
|
static struct secasvar *
|
|
key_getsavbyspi(struct secashead *sah, u_int32_t spi)
|
|
{
|
|
struct secasvar *sav;
|
|
u_int stateidx, state;
|
|
|
|
sav = NULL;
|
|
SAHTREE_LOCK_ASSERT();
|
|
/* search all status */
|
|
for (stateidx = 0;
|
|
stateidx < _ARRAYLEN(saorder_state_alive);
|
|
stateidx++) {
|
|
|
|
state = saorder_state_alive[stateidx];
|
|
LIST_FOREACH(sav, &sah->savtree[state], chain) {
|
|
|
|
/* sanity check */
|
|
if (sav->state != state) {
|
|
ipseclog((LOG_DEBUG, "%s: "
|
|
"invalid sav->state (queue: %d SA: %d)\n",
|
|
__func__, state, sav->state));
|
|
continue;
|
|
}
|
|
|
|
if (sav->spi == spi)
|
|
return sav;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
|
|
* You must update these if need.
|
|
* OUT: 0: success.
|
|
* !0: failure.
|
|
*
|
|
* does not modify mbuf. does not free mbuf on error.
|
|
*/
|
|
static int
|
|
key_setsaval(struct secasvar *sav, struct mbuf *m,
|
|
const struct sadb_msghdr *mhp)
|
|
{
|
|
int error = 0;
|
|
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* initialization */
|
|
sav->replay = NULL;
|
|
sav->key_auth = NULL;
|
|
sav->key_enc = NULL;
|
|
sav->sched = NULL;
|
|
sav->schedlen = 0;
|
|
sav->iv = NULL;
|
|
sav->lft_c = NULL;
|
|
sav->lft_h = NULL;
|
|
sav->lft_s = NULL;
|
|
sav->tdb_xform = NULL; /* transform */
|
|
sav->tdb_encalgxform = NULL; /* encoding algorithm */
|
|
sav->tdb_authalgxform = NULL; /* authentication algorithm */
|
|
sav->tdb_compalgxform = NULL; /* compression algorithm */
|
|
/* Initialize even if NAT-T not compiled in: */
|
|
sav->natt_type = 0;
|
|
sav->natt_esp_frag_len = 0;
|
|
|
|
/* SA */
|
|
if (mhp->ext[SADB_EXT_SA] != NULL) {
|
|
const struct sadb_sa *sa0;
|
|
|
|
sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
|
|
if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
sav->alg_auth = sa0->sadb_sa_auth;
|
|
sav->alg_enc = sa0->sadb_sa_encrypt;
|
|
sav->flags = sa0->sadb_sa_flags;
|
|
|
|
/* replay window */
|
|
if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
|
|
sav->replay = (struct secreplay *)
|
|
malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO);
|
|
if (sav->replay == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",
|
|
__func__));
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
if (sa0->sadb_sa_replay != 0)
|
|
sav->replay->bitmap = (caddr_t)(sav->replay+1);
|
|
sav->replay->wsize = sa0->sadb_sa_replay;
|
|
}
|
|
}
|
|
|
|
/* Authentication keys */
|
|
if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
|
|
const struct sadb_key *key0;
|
|
int len;
|
|
|
|
key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
|
|
len = mhp->extlen[SADB_EXT_KEY_AUTH];
|
|
|
|
error = 0;
|
|
if (len < sizeof(*key0)) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
switch (mhp->msg->sadb_msg_satype) {
|
|
case SADB_SATYPE_AH:
|
|
case SADB_SATYPE_ESP:
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
|
|
sav->alg_auth != SADB_X_AALG_NULL)
|
|
error = EINVAL;
|
|
break;
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (error) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n",
|
|
__func__));
|
|
goto fail;
|
|
}
|
|
|
|
sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len,
|
|
M_IPSEC_MISC);
|
|
if (sav->key_auth == NULL ) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",
|
|
__func__));
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* Encryption key */
|
|
if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
|
|
const struct sadb_key *key0;
|
|
int len;
|
|
|
|
key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
|
|
len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
|
|
|
|
error = 0;
|
|
if (len < sizeof(*key0)) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
switch (mhp->msg->sadb_msg_satype) {
|
|
case SADB_SATYPE_ESP:
|
|
if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
|
|
sav->alg_enc != SADB_EALG_NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
sav->key_enc = (struct seckey *)key_dup_keymsg(key0,
|
|
len,
|
|
M_IPSEC_MISC);
|
|
if (sav->key_enc == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",
|
|
__func__));
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
break;
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
|
|
error = EINVAL;
|
|
sav->key_enc = NULL; /*just in case*/
|
|
break;
|
|
case SADB_SATYPE_AH:
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (error) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n",
|
|
__func__));
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* set iv */
|
|
sav->ivlen = 0;
|
|
|
|
switch (mhp->msg->sadb_msg_satype) {
|
|
case SADB_SATYPE_AH:
|
|
error = xform_init(sav, XF_AH);
|
|
break;
|
|
case SADB_SATYPE_ESP:
|
|
error = xform_init(sav, XF_ESP);
|
|
break;
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
error = xform_init(sav, XF_IPCOMP);
|
|
break;
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
error = xform_init(sav, XF_TCPSIGNATURE);
|
|
break;
|
|
}
|
|
if (error) {
|
|
ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n",
|
|
__func__, mhp->msg->sadb_msg_satype));
|
|
goto fail;
|
|
}
|
|
|
|
/* reset created */
|
|
sav->created = time_second;
|
|
|
|
/* make lifetime for CURRENT */
|
|
sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT);
|
|
if (sav->lft_c == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
|
|
sav->lft_c->allocations = 0;
|
|
sav->lft_c->bytes = 0;
|
|
sav->lft_c->addtime = time_second;
|
|
sav->lft_c->usetime = 0;
|
|
|
|
/* lifetimes for HARD and SOFT */
|
|
{
|
|
const struct sadb_lifetime *lft0;
|
|
|
|
lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
|
|
if (lft0 != NULL) {
|
|
if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC);
|
|
if (sav->lft_h == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
/* to be initialize ? */
|
|
}
|
|
|
|
lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
|
|
if (lft0 != NULL) {
|
|
if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC);
|
|
if (sav->lft_s == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
/* to be initialize ? */
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
/* initialization */
|
|
key_cleansav(sav);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* validation with a secasvar entry, and set SADB_SATYPE_MATURE.
|
|
* OUT: 0: valid
|
|
* other: errno
|
|
*/
|
|
static int
|
|
key_mature(struct secasvar *sav)
|
|
{
|
|
int error;
|
|
|
|
/* check SPI value */
|
|
switch (sav->sah->saidx.proto) {
|
|
case IPPROTO_ESP:
|
|
case IPPROTO_AH:
|
|
/*
|
|
* RFC 4302, 2.4. Security Parameters Index (SPI), SPI values
|
|
* 1-255 reserved by IANA for future use,
|
|
* 0 for implementation specific, local use.
|
|
*/
|
|
if (ntohl(sav->spi) <= 255) {
|
|
ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n",
|
|
__func__, (u_int32_t)ntohl(sav->spi)));
|
|
return EINVAL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* check satype */
|
|
switch (sav->sah->saidx.proto) {
|
|
case IPPROTO_ESP:
|
|
/* check flags */
|
|
if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) ==
|
|
(SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
|
|
"given to old-esp.\n", __func__));
|
|
return EINVAL;
|
|
}
|
|
error = xform_init(sav, XF_ESP);
|
|
break;
|
|
case IPPROTO_AH:
|
|
/* check flags */
|
|
if (sav->flags & SADB_X_EXT_DERIV) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
|
|
"given to AH SA.\n", __func__));
|
|
return EINVAL;
|
|
}
|
|
if (sav->alg_enc != SADB_EALG_NONE) {
|
|
ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
|
|
"mismated.\n", __func__));
|
|
return(EINVAL);
|
|
}
|
|
error = xform_init(sav, XF_AH);
|
|
break;
|
|
case IPPROTO_IPCOMP:
|
|
if (sav->alg_auth != SADB_AALG_NONE) {
|
|
ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
|
|
"mismated.\n", __func__));
|
|
return(EINVAL);
|
|
}
|
|
if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
|
|
&& ntohl(sav->spi) >= 0x10000) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n",
|
|
__func__));
|
|
return(EINVAL);
|
|
}
|
|
error = xform_init(sav, XF_IPCOMP);
|
|
break;
|
|
case IPPROTO_TCP:
|
|
if (sav->alg_enc != SADB_EALG_NONE) {
|
|
ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
|
|
"mismated.\n", __func__));
|
|
return(EINVAL);
|
|
}
|
|
error = xform_init(sav, XF_TCPSIGNATURE);
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__));
|
|
error = EPROTONOSUPPORT;
|
|
break;
|
|
}
|
|
if (error == 0) {
|
|
SAHTREE_LOCK();
|
|
key_sa_chgstate(sav, SADB_SASTATE_MATURE);
|
|
SAHTREE_UNLOCK();
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* subroutine for SADB_GET and SADB_DUMP.
|
|
*/
|
|
static struct mbuf *
|
|
key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
|
|
u_int32_t seq, u_int32_t pid)
|
|
{
|
|
struct mbuf *result = NULL, *tres = NULL, *m;
|
|
int i;
|
|
int dumporder[] = {
|
|
SADB_EXT_SA, SADB_X_EXT_SA2,
|
|
SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
|
|
SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
|
|
SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
|
|
SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
|
|
SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
|
|
#ifdef IPSEC_NAT_T
|
|
SADB_X_EXT_NAT_T_TYPE,
|
|
SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT,
|
|
SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR,
|
|
SADB_X_EXT_NAT_T_FRAG,
|
|
#endif
|
|
};
|
|
|
|
m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
|
|
if (m == NULL)
|
|
goto fail;
|
|
result = m;
|
|
|
|
for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
|
|
m = NULL;
|
|
switch (dumporder[i]) {
|
|
case SADB_EXT_SA:
|
|
m = key_setsadbsa(sav);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_X_EXT_SA2:
|
|
m = key_setsadbxsa2(sav->sah->saidx.mode,
|
|
sav->replay ? sav->replay->count : 0,
|
|
sav->sah->saidx.reqid);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_ADDRESS_SRC:
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
|
|
&sav->sah->saidx.src.sa,
|
|
FULLMASK, IPSEC_ULPROTO_ANY);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_ADDRESS_DST:
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
|
|
&sav->sah->saidx.dst.sa,
|
|
FULLMASK, IPSEC_ULPROTO_ANY);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_KEY_AUTH:
|
|
if (!sav->key_auth)
|
|
continue;
|
|
m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_KEY_ENCRYPT:
|
|
if (!sav->key_enc)
|
|
continue;
|
|
m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_LIFETIME_CURRENT:
|
|
if (!sav->lft_c)
|
|
continue;
|
|
m = key_setlifetime(sav->lft_c,
|
|
SADB_EXT_LIFETIME_CURRENT);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_LIFETIME_HARD:
|
|
if (!sav->lft_h)
|
|
continue;
|
|
m = key_setlifetime(sav->lft_h,
|
|
SADB_EXT_LIFETIME_HARD);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_EXT_LIFETIME_SOFT:
|
|
if (!sav->lft_s)
|
|
continue;
|
|
m = key_setlifetime(sav->lft_s,
|
|
SADB_EXT_LIFETIME_SOFT);
|
|
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
case SADB_X_EXT_NAT_T_TYPE:
|
|
m = key_setsadbxtype(sav->natt_type);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_X_EXT_NAT_T_DPORT:
|
|
m = key_setsadbxport(
|
|
KEY_PORTFROMSADDR(&sav->sah->saidx.dst),
|
|
SADB_X_EXT_NAT_T_DPORT);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_X_EXT_NAT_T_SPORT:
|
|
m = key_setsadbxport(
|
|
KEY_PORTFROMSADDR(&sav->sah->saidx.src),
|
|
SADB_X_EXT_NAT_T_SPORT);
|
|
if (!m)
|
|
goto fail;
|
|
break;
|
|
|
|
case SADB_X_EXT_NAT_T_OAI:
|
|
case SADB_X_EXT_NAT_T_OAR:
|
|
case SADB_X_EXT_NAT_T_FRAG:
|
|
/* We do not (yet) support those. */
|
|
continue;
|
|
#endif
|
|
|
|
case SADB_EXT_ADDRESS_PROXY:
|
|
case SADB_EXT_IDENTITY_SRC:
|
|
case SADB_EXT_IDENTITY_DST:
|
|
/* XXX: should we brought from SPD ? */
|
|
case SADB_EXT_SENSITIVITY:
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
if (!m)
|
|
goto fail;
|
|
if (tres)
|
|
m_cat(m, tres);
|
|
tres = m;
|
|
|
|
}
|
|
|
|
m_cat(result, tres);
|
|
if (result->m_len < sizeof(struct sadb_msg)) {
|
|
result = m_pullup(result, sizeof(struct sadb_msg));
|
|
if (result == NULL)
|
|
goto fail;
|
|
}
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
return result;
|
|
|
|
fail:
|
|
m_freem(result);
|
|
m_freem(tres);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* set data into sadb_msg.
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq,
|
|
pid_t pid, u_int16_t reserved)
|
|
{
|
|
struct mbuf *m;
|
|
struct sadb_msg *p;
|
|
int len;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
if (len > MCLBYTES)
|
|
return NULL;
|
|
MGETHDR(m, M_NOWAIT, MT_DATA);
|
|
if (m && len > MHLEN) {
|
|
if (!(MCLGET(m, M_NOWAIT))) {
|
|
m_freem(m);
|
|
m = NULL;
|
|
}
|
|
}
|
|
if (!m)
|
|
return NULL;
|
|
m->m_pkthdr.len = m->m_len = len;
|
|
m->m_next = NULL;
|
|
|
|
p = mtod(m, struct sadb_msg *);
|
|
|
|
bzero(p, len);
|
|
p->sadb_msg_version = PF_KEY_V2;
|
|
p->sadb_msg_type = type;
|
|
p->sadb_msg_errno = 0;
|
|
p->sadb_msg_satype = satype;
|
|
p->sadb_msg_len = PFKEY_UNIT64(tlen);
|
|
p->sadb_msg_reserved = reserved;
|
|
p->sadb_msg_seq = seq;
|
|
p->sadb_msg_pid = (u_int32_t)pid;
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* copy secasvar data into sadb_address.
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbsa(struct secasvar *sav)
|
|
{
|
|
struct mbuf *m;
|
|
struct sadb_sa *p;
|
|
int len;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_sa *);
|
|
bzero(p, len);
|
|
p->sadb_sa_len = PFKEY_UNIT64(len);
|
|
p->sadb_sa_exttype = SADB_EXT_SA;
|
|
p->sadb_sa_spi = sav->spi;
|
|
p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
|
|
p->sadb_sa_state = sav->state;
|
|
p->sadb_sa_auth = sav->alg_auth;
|
|
p->sadb_sa_encrypt = sav->alg_enc;
|
|
p->sadb_sa_flags = sav->flags;
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* set data into sadb_address.
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr,
|
|
u_int8_t prefixlen, u_int16_t ul_proto)
|
|
{
|
|
struct mbuf *m;
|
|
struct sadb_address *p;
|
|
size_t len;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
|
|
PFKEY_ALIGN8(saddr->sa_len);
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_address *);
|
|
|
|
bzero(p, len);
|
|
p->sadb_address_len = PFKEY_UNIT64(len);
|
|
p->sadb_address_exttype = exttype;
|
|
p->sadb_address_proto = ul_proto;
|
|
if (prefixlen == FULLMASK) {
|
|
switch (saddr->sa_family) {
|
|
case AF_INET:
|
|
prefixlen = sizeof(struct in_addr) << 3;
|
|
break;
|
|
case AF_INET6:
|
|
prefixlen = sizeof(struct in6_addr) << 3;
|
|
break;
|
|
default:
|
|
; /*XXX*/
|
|
}
|
|
}
|
|
p->sadb_address_prefixlen = prefixlen;
|
|
p->sadb_address_reserved = 0;
|
|
|
|
bcopy(saddr,
|
|
mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
|
|
saddr->sa_len);
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* set data into sadb_x_sa2.
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
|
|
{
|
|
struct mbuf *m;
|
|
struct sadb_x_sa2 *p;
|
|
size_t len;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_x_sa2 *);
|
|
|
|
bzero(p, len);
|
|
p->sadb_x_sa2_len = PFKEY_UNIT64(len);
|
|
p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
|
|
p->sadb_x_sa2_mode = mode;
|
|
p->sadb_x_sa2_reserved1 = 0;
|
|
p->sadb_x_sa2_reserved2 = 0;
|
|
p->sadb_x_sa2_sequence = seq;
|
|
p->sadb_x_sa2_reqid = reqid;
|
|
|
|
return m;
|
|
}
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Set a type in sadb_x_nat_t_type.
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbxtype(u_int16_t type)
|
|
{
|
|
struct mbuf *m;
|
|
size_t len;
|
|
struct sadb_x_nat_t_type *p;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type));
|
|
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_x_nat_t_type *);
|
|
|
|
bzero(p, len);
|
|
p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len);
|
|
p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
|
|
p->sadb_x_nat_t_type_type = type;
|
|
|
|
return (m);
|
|
}
|
|
/*
|
|
* Set a port in sadb_x_nat_t_port.
|
|
* In contrast to default RFC 2367 behaviour, port is in network byte order.
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbxport(u_int16_t port, u_int16_t type)
|
|
{
|
|
struct mbuf *m;
|
|
size_t len;
|
|
struct sadb_x_nat_t_port *p;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port));
|
|
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_x_nat_t_port *);
|
|
|
|
bzero(p, len);
|
|
p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len);
|
|
p->sadb_x_nat_t_port_exttype = type;
|
|
p->sadb_x_nat_t_port_port = port;
|
|
|
|
return (m);
|
|
}
|
|
|
|
/*
|
|
* Get port from sockaddr. Port is in network byte order.
|
|
*/
|
|
u_int16_t
|
|
key_portfromsaddr(struct sockaddr *sa)
|
|
{
|
|
|
|
switch (sa->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
return ((struct sockaddr_in *)sa)->sin_port;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
return ((struct sockaddr_in6 *)sa)->sin6_port;
|
|
#endif
|
|
}
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s unexpected address family %d\n",
|
|
__func__, sa->sa_family));
|
|
return (0);
|
|
}
|
|
#endif /* IPSEC_NAT_T */
|
|
|
|
/*
|
|
* Set port in struct sockaddr. Port is in network byte order.
|
|
*/
|
|
static void
|
|
key_porttosaddr(struct sockaddr *sa, u_int16_t port)
|
|
{
|
|
|
|
switch (sa->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
((struct sockaddr_in *)sa)->sin_port = port;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
((struct sockaddr_in6 *)sa)->sin6_port = port;
|
|
break;
|
|
#endif
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n",
|
|
__func__, sa->sa_family));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* set data into sadb_x_policy
|
|
*/
|
|
static struct mbuf *
|
|
key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
|
|
{
|
|
struct mbuf *m;
|
|
struct sadb_x_policy *p;
|
|
size_t len;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_x_policy *);
|
|
|
|
bzero(p, len);
|
|
p->sadb_x_policy_len = PFKEY_UNIT64(len);
|
|
p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
|
|
p->sadb_x_policy_type = type;
|
|
p->sadb_x_policy_dir = dir;
|
|
p->sadb_x_policy_id = id;
|
|
|
|
return m;
|
|
}
|
|
|
|
/* %%% utilities */
|
|
/* Take a key message (sadb_key) from the socket and turn it into one
|
|
* of the kernel's key structures (seckey).
|
|
*
|
|
* IN: pointer to the src
|
|
* OUT: NULL no more memory
|
|
*/
|
|
struct seckey *
|
|
key_dup_keymsg(const struct sadb_key *src, u_int len,
|
|
struct malloc_type *type)
|
|
{
|
|
struct seckey *dst;
|
|
dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT);
|
|
if (dst != NULL) {
|
|
dst->bits = src->sadb_key_bits;
|
|
dst->key_data = (char *)malloc(len, type, M_NOWAIT);
|
|
if (dst->key_data != NULL) {
|
|
bcopy((const char *)src + sizeof(struct sadb_key),
|
|
dst->key_data, len);
|
|
} else {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",
|
|
__func__));
|
|
free(dst, type);
|
|
dst = NULL;
|
|
}
|
|
} else {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",
|
|
__func__));
|
|
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/* Take a lifetime message (sadb_lifetime) passed in on a socket and
|
|
* turn it into one of the kernel's lifetime structures (seclifetime).
|
|
*
|
|
* IN: pointer to the destination, source and malloc type
|
|
* OUT: NULL, no more memory
|
|
*/
|
|
|
|
static struct seclifetime *
|
|
key_dup_lifemsg(const struct sadb_lifetime *src, struct malloc_type *type)
|
|
{
|
|
struct seclifetime *dst = NULL;
|
|
|
|
dst = (struct seclifetime *)malloc(sizeof(struct seclifetime),
|
|
type, M_NOWAIT);
|
|
if (dst == NULL) {
|
|
/* XXX counter */
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
} else {
|
|
dst->allocations = src->sadb_lifetime_allocations;
|
|
dst->bytes = src->sadb_lifetime_bytes;
|
|
dst->addtime = src->sadb_lifetime_addtime;
|
|
dst->usetime = src->sadb_lifetime_usetime;
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/* compare my own address
|
|
* OUT: 1: true, i.e. my address.
|
|
* 0: false
|
|
*/
|
|
int
|
|
key_ismyaddr(struct sockaddr *sa)
|
|
{
|
|
|
|
IPSEC_ASSERT(sa != NULL, ("null sockaddr"));
|
|
switch (sa->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
return (in_localip(satosin(sa)->sin_addr));
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
return key_ismyaddr6((struct sockaddr_in6 *)sa);
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef INET6
|
|
/*
|
|
* compare my own address for IPv6.
|
|
* 1: ours
|
|
* 0: other
|
|
*/
|
|
static int
|
|
key_ismyaddr6(struct sockaddr_in6 *sin6)
|
|
{
|
|
struct in6_addr in6;
|
|
|
|
if (!IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
return (in6_localip(&sin6->sin6_addr));
|
|
|
|
/* Convert address into kernel-internal form */
|
|
in6 = sin6->sin6_addr;
|
|
in6.s6_addr16[1] = htons(sin6->sin6_scope_id & 0xffff);
|
|
return (in6_localip(&in6));
|
|
}
|
|
#endif /*INET6*/
|
|
|
|
/*
|
|
* compare two secasindex structure.
|
|
* flag can specify to compare 2 saidxes.
|
|
* compare two secasindex structure without both mode and reqid.
|
|
* don't compare port.
|
|
* IN:
|
|
* saidx0: source, it can be in SAD.
|
|
* saidx1: object.
|
|
* OUT:
|
|
* 1 : equal
|
|
* 0 : not equal
|
|
*/
|
|
static int
|
|
key_cmpsaidx(const struct secasindex *saidx0, const struct secasindex *saidx1,
|
|
int flag)
|
|
{
|
|
int chkport = 0;
|
|
|
|
/* sanity */
|
|
if (saidx0 == NULL && saidx1 == NULL)
|
|
return 1;
|
|
|
|
if (saidx0 == NULL || saidx1 == NULL)
|
|
return 0;
|
|
|
|
if (saidx0->proto != saidx1->proto)
|
|
return 0;
|
|
|
|
if (flag == CMP_EXACTLY) {
|
|
if (saidx0->mode != saidx1->mode)
|
|
return 0;
|
|
if (saidx0->reqid != saidx1->reqid)
|
|
return 0;
|
|
if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 ||
|
|
bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0)
|
|
return 0;
|
|
} else {
|
|
|
|
/* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
|
|
if (flag == CMP_MODE_REQID
|
|
||flag == CMP_REQID) {
|
|
/*
|
|
* If reqid of SPD is non-zero, unique SA is required.
|
|
* The result must be of same reqid in this case.
|
|
*/
|
|
if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
|
|
return 0;
|
|
}
|
|
|
|
if (flag == CMP_MODE_REQID) {
|
|
if (saidx0->mode != IPSEC_MODE_ANY
|
|
&& saidx0->mode != saidx1->mode)
|
|
return 0;
|
|
}
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* If NAT-T is enabled, check ports for tunnel mode.
|
|
* Do not check ports if they are set to zero in the SPD.
|
|
* Also do not do it for native transport mode, as there
|
|
* is no port information available in the SP.
|
|
*/
|
|
if ((saidx1->mode == IPSEC_MODE_TUNNEL ||
|
|
(saidx1->mode == IPSEC_MODE_TRANSPORT &&
|
|
saidx1->proto == IPPROTO_ESP)) &&
|
|
saidx1->src.sa.sa_family == AF_INET &&
|
|
saidx1->dst.sa.sa_family == AF_INET &&
|
|
((const struct sockaddr_in *)(&saidx1->src))->sin_port &&
|
|
((const struct sockaddr_in *)(&saidx1->dst))->sin_port)
|
|
chkport = 1;
|
|
#endif /* IPSEC_NAT_T */
|
|
|
|
if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) {
|
|
return 0;
|
|
}
|
|
if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* compare two secindex structure exactly.
|
|
* IN:
|
|
* spidx0: source, it is often in SPD.
|
|
* spidx1: object, it is often from PFKEY message.
|
|
* OUT:
|
|
* 1 : equal
|
|
* 0 : not equal
|
|
*/
|
|
static int
|
|
key_cmpspidx_exactly(struct secpolicyindex *spidx0,
|
|
struct secpolicyindex *spidx1)
|
|
{
|
|
/* sanity */
|
|
if (spidx0 == NULL && spidx1 == NULL)
|
|
return 1;
|
|
|
|
if (spidx0 == NULL || spidx1 == NULL)
|
|
return 0;
|
|
|
|
if (spidx0->prefs != spidx1->prefs
|
|
|| spidx0->prefd != spidx1->prefd
|
|
|| spidx0->ul_proto != spidx1->ul_proto)
|
|
return 0;
|
|
|
|
return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
|
|
key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
|
|
}
|
|
|
|
/*
|
|
* compare two secindex structure with mask.
|
|
* IN:
|
|
* spidx0: source, it is often in SPD.
|
|
* spidx1: object, it is often from IP header.
|
|
* OUT:
|
|
* 1 : equal
|
|
* 0 : not equal
|
|
*/
|
|
static int
|
|
key_cmpspidx_withmask(struct secpolicyindex *spidx0,
|
|
struct secpolicyindex *spidx1)
|
|
{
|
|
/* sanity */
|
|
if (spidx0 == NULL && spidx1 == NULL)
|
|
return 1;
|
|
|
|
if (spidx0 == NULL || spidx1 == NULL)
|
|
return 0;
|
|
|
|
if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
|
|
spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
|
|
spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
|
|
spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
|
|
return 0;
|
|
|
|
/* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
|
|
if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
|
|
&& spidx0->ul_proto != spidx1->ul_proto)
|
|
return 0;
|
|
|
|
switch (spidx0->src.sa.sa_family) {
|
|
case AF_INET:
|
|
if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
|
|
&& spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
|
|
return 0;
|
|
if (!key_bbcmp(&spidx0->src.sin.sin_addr,
|
|
&spidx1->src.sin.sin_addr, spidx0->prefs))
|
|
return 0;
|
|
break;
|
|
case AF_INET6:
|
|
if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
|
|
&& spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
|
|
return 0;
|
|
/*
|
|
* scope_id check. if sin6_scope_id is 0, we regard it
|
|
* as a wildcard scope, which matches any scope zone ID.
|
|
*/
|
|
if (spidx0->src.sin6.sin6_scope_id &&
|
|
spidx1->src.sin6.sin6_scope_id &&
|
|
spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
|
|
return 0;
|
|
if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
|
|
&spidx1->src.sin6.sin6_addr, spidx0->prefs))
|
|
return 0;
|
|
break;
|
|
default:
|
|
/* XXX */
|
|
if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
switch (spidx0->dst.sa.sa_family) {
|
|
case AF_INET:
|
|
if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
|
|
&& spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
|
|
return 0;
|
|
if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
|
|
&spidx1->dst.sin.sin_addr, spidx0->prefd))
|
|
return 0;
|
|
break;
|
|
case AF_INET6:
|
|
if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
|
|
&& spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
|
|
return 0;
|
|
/*
|
|
* scope_id check. if sin6_scope_id is 0, we regard it
|
|
* as a wildcard scope, which matches any scope zone ID.
|
|
*/
|
|
if (spidx0->dst.sin6.sin6_scope_id &&
|
|
spidx1->dst.sin6.sin6_scope_id &&
|
|
spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
|
|
return 0;
|
|
if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
|
|
&spidx1->dst.sin6.sin6_addr, spidx0->prefd))
|
|
return 0;
|
|
break;
|
|
default:
|
|
/* XXX */
|
|
if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
/* XXX Do we check other field ? e.g. flowinfo */
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* returns 0 on match */
|
|
static int
|
|
key_sockaddrcmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
|
|
int port)
|
|
{
|
|
#ifdef satosin
|
|
#undef satosin
|
|
#endif
|
|
#define satosin(s) ((const struct sockaddr_in *)s)
|
|
#ifdef satosin6
|
|
#undef satosin6
|
|
#endif
|
|
#define satosin6(s) ((const struct sockaddr_in6 *)s)
|
|
if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
|
|
return 1;
|
|
|
|
switch (sa1->sa_family) {
|
|
case AF_INET:
|
|
if (sa1->sa_len != sizeof(struct sockaddr_in))
|
|
return 1;
|
|
if (satosin(sa1)->sin_addr.s_addr !=
|
|
satosin(sa2)->sin_addr.s_addr) {
|
|
return 1;
|
|
}
|
|
if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
|
|
return 1;
|
|
break;
|
|
case AF_INET6:
|
|
if (sa1->sa_len != sizeof(struct sockaddr_in6))
|
|
return 1; /*EINVAL*/
|
|
if (satosin6(sa1)->sin6_scope_id !=
|
|
satosin6(sa2)->sin6_scope_id) {
|
|
return 1;
|
|
}
|
|
if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
|
|
&satosin6(sa2)->sin6_addr)) {
|
|
return 1;
|
|
}
|
|
if (port &&
|
|
satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
|
|
return 1;
|
|
}
|
|
break;
|
|
default:
|
|
if (bcmp(sa1, sa2, sa1->sa_len) != 0)
|
|
return 1;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
#undef satosin
|
|
#undef satosin6
|
|
}
|
|
|
|
/*
|
|
* compare two buffers with mask.
|
|
* IN:
|
|
* addr1: source
|
|
* addr2: object
|
|
* bits: Number of bits to compare
|
|
* OUT:
|
|
* 1 : equal
|
|
* 0 : not equal
|
|
*/
|
|
static int
|
|
key_bbcmp(const void *a1, const void *a2, u_int bits)
|
|
{
|
|
const unsigned char *p1 = a1;
|
|
const unsigned char *p2 = a2;
|
|
|
|
/* XXX: This could be considerably faster if we compare a word
|
|
* at a time, but it is complicated on LSB Endian machines */
|
|
|
|
/* Handle null pointers */
|
|
if (p1 == NULL || p2 == NULL)
|
|
return (p1 == p2);
|
|
|
|
while (bits >= 8) {
|
|
if (*p1++ != *p2++)
|
|
return 0;
|
|
bits -= 8;
|
|
}
|
|
|
|
if (bits > 0) {
|
|
u_int8_t mask = ~((1<<(8-bits))-1);
|
|
if ((*p1 & mask) != (*p2 & mask))
|
|
return 0;
|
|
}
|
|
return 1; /* Match! */
|
|
}
|
|
|
|
static void
|
|
key_flush_spd(time_t now)
|
|
{
|
|
SPTREE_RLOCK_TRACKER;
|
|
struct secpolicy *sp;
|
|
u_int dir;
|
|
|
|
/* SPD */
|
|
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
|
|
restart:
|
|
SPTREE_RLOCK();
|
|
TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
|
|
if (sp->lifetime == 0 && sp->validtime == 0)
|
|
continue;
|
|
if ((sp->lifetime &&
|
|
now - sp->created > sp->lifetime) ||
|
|
(sp->validtime &&
|
|
now - sp->lastused > sp->validtime)) {
|
|
SP_ADDREF(sp);
|
|
SPTREE_RUNLOCK();
|
|
key_spdexpire(sp);
|
|
key_unlink(sp);
|
|
KEY_FREESP(&sp);
|
|
goto restart;
|
|
}
|
|
}
|
|
SPTREE_RUNLOCK();
|
|
}
|
|
}
|
|
|
|
static void
|
|
key_flush_sad(time_t now)
|
|
{
|
|
struct secashead *sah, *nextsah;
|
|
struct secasvar *sav, *nextsav;
|
|
|
|
/* SAD */
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) {
|
|
/* if sah has been dead, then delete it and process next sah. */
|
|
if (sah->state == SADB_SASTATE_DEAD) {
|
|
key_delsah(sah);
|
|
continue;
|
|
}
|
|
|
|
/* if LARVAL entry doesn't become MATURE, delete it. */
|
|
LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) {
|
|
/* Need to also check refcnt for a larval SA ??? */
|
|
if (now - sav->created > V_key_larval_lifetime)
|
|
KEY_FREESAV(&sav);
|
|
}
|
|
|
|
/*
|
|
* check MATURE entry to start to send expire message
|
|
* whether or not.
|
|
*/
|
|
LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) {
|
|
/* we don't need to check. */
|
|
if (sav->lft_s == NULL)
|
|
continue;
|
|
|
|
/* sanity check */
|
|
if (sav->lft_c == NULL) {
|
|
ipseclog((LOG_DEBUG,"%s: there is no CURRENT "
|
|
"time, why?\n", __func__));
|
|
continue;
|
|
}
|
|
/*
|
|
* RFC 2367:
|
|
* HARD lifetimes MUST take precedence over SOFT
|
|
* lifetimes, meaning if the HARD and SOFT lifetimes
|
|
* are the same, the HARD lifetime will appear on the
|
|
* EXPIRE message.
|
|
*/
|
|
/* check HARD lifetime */
|
|
if ((sav->lft_h->addtime != 0 &&
|
|
now - sav->created > sav->lft_h->addtime) ||
|
|
(sav->lft_h->bytes != 0 &&
|
|
sav->lft_h->bytes < sav->lft_c->bytes)) {
|
|
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
|
|
key_expire(sav, 1);
|
|
KEY_FREESAV(&sav);
|
|
}
|
|
/* check SOFT lifetime */
|
|
else if ((sav->lft_s->addtime != 0 &&
|
|
now - sav->created > sav->lft_s->addtime) ||
|
|
(sav->lft_s->bytes != 0 &&
|
|
sav->lft_s->bytes < sav->lft_c->bytes)) {
|
|
key_sa_chgstate(sav, SADB_SASTATE_DYING);
|
|
key_expire(sav, 0);
|
|
}
|
|
}
|
|
|
|
/* check DYING entry to change status to DEAD. */
|
|
LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) {
|
|
/* we don't need to check. */
|
|
if (sav->lft_h == NULL)
|
|
continue;
|
|
|
|
/* sanity check */
|
|
if (sav->lft_c == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: there is no CURRENT "
|
|
"time, why?\n", __func__));
|
|
continue;
|
|
}
|
|
|
|
if (sav->lft_h->addtime != 0 &&
|
|
now - sav->created > sav->lft_h->addtime) {
|
|
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
|
|
key_expire(sav, 1);
|
|
KEY_FREESAV(&sav);
|
|
}
|
|
#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
|
|
else if (sav->lft_s != NULL
|
|
&& sav->lft_s->addtime != 0
|
|
&& now - sav->created > sav->lft_s->addtime) {
|
|
/*
|
|
* XXX: should be checked to be
|
|
* installed the valid SA.
|
|
*/
|
|
|
|
/*
|
|
* If there is no SA then sending
|
|
* expire message.
|
|
*/
|
|
key_expire(sav, 0);
|
|
}
|
|
#endif
|
|
/* check HARD lifetime by bytes */
|
|
else if (sav->lft_h->bytes != 0 &&
|
|
sav->lft_h->bytes < sav->lft_c->bytes) {
|
|
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
|
|
key_expire(sav, 1);
|
|
KEY_FREESAV(&sav);
|
|
}
|
|
}
|
|
|
|
/* delete entry in DEAD */
|
|
LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) {
|
|
/* sanity check */
|
|
if (sav->state != SADB_SASTATE_DEAD) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid sav->state "
|
|
"(queue: %d SA: %d): kill it anyway\n",
|
|
__func__,
|
|
SADB_SASTATE_DEAD, sav->state));
|
|
}
|
|
/*
|
|
* do not call key_freesav() here.
|
|
* sav should already be freed, and sav->refcnt
|
|
* shows other references to sav
|
|
* (such as from SPD).
|
|
*/
|
|
}
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
}
|
|
|
|
static void
|
|
key_flush_acq(time_t now)
|
|
{
|
|
struct secacq *acq, *nextacq;
|
|
|
|
/* ACQ tree */
|
|
ACQ_LOCK();
|
|
for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) {
|
|
nextacq = LIST_NEXT(acq, chain);
|
|
if (now - acq->created > V_key_blockacq_lifetime
|
|
&& __LIST_CHAINED(acq)) {
|
|
LIST_REMOVE(acq, chain);
|
|
free(acq, M_IPSEC_SAQ);
|
|
}
|
|
}
|
|
ACQ_UNLOCK();
|
|
}
|
|
|
|
static void
|
|
key_flush_spacq(time_t now)
|
|
{
|
|
struct secspacq *acq, *nextacq;
|
|
|
|
/* SP ACQ tree */
|
|
SPACQ_LOCK();
|
|
for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) {
|
|
nextacq = LIST_NEXT(acq, chain);
|
|
if (now - acq->created > V_key_blockacq_lifetime
|
|
&& __LIST_CHAINED(acq)) {
|
|
LIST_REMOVE(acq, chain);
|
|
free(acq, M_IPSEC_SAQ);
|
|
}
|
|
}
|
|
SPACQ_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* time handler.
|
|
* scanning SPD and SAD to check status for each entries,
|
|
* and do to remove or to expire.
|
|
* XXX: year 2038 problem may remain.
|
|
*/
|
|
static void
|
|
key_timehandler(void *arg)
|
|
{
|
|
VNET_ITERATOR_DECL(vnet_iter);
|
|
time_t now = time_second;
|
|
|
|
VNET_LIST_RLOCK_NOSLEEP();
|
|
VNET_FOREACH(vnet_iter) {
|
|
CURVNET_SET(vnet_iter);
|
|
key_flush_spd(now);
|
|
key_flush_sad(now);
|
|
key_flush_acq(now);
|
|
key_flush_spacq(now);
|
|
CURVNET_RESTORE();
|
|
}
|
|
VNET_LIST_RUNLOCK_NOSLEEP();
|
|
|
|
#ifndef IPSEC_DEBUG2
|
|
/* do exchange to tick time !! */
|
|
callout_schedule(&key_timer, hz);
|
|
#endif /* IPSEC_DEBUG2 */
|
|
}
|
|
|
|
u_long
|
|
key_random()
|
|
{
|
|
u_long value;
|
|
|
|
key_randomfill(&value, sizeof(value));
|
|
return value;
|
|
}
|
|
|
|
void
|
|
key_randomfill(void *p, size_t l)
|
|
{
|
|
size_t n;
|
|
u_long v;
|
|
static int warn = 1;
|
|
|
|
n = 0;
|
|
n = (size_t)read_random(p, (u_int)l);
|
|
/* last resort */
|
|
while (n < l) {
|
|
v = random();
|
|
bcopy(&v, (u_int8_t *)p + n,
|
|
l - n < sizeof(v) ? l - n : sizeof(v));
|
|
n += sizeof(v);
|
|
|
|
if (warn) {
|
|
printf("WARNING: pseudo-random number generator "
|
|
"used for IPsec processing\n");
|
|
warn = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* map SADB_SATYPE_* to IPPROTO_*.
|
|
* if satype == SADB_SATYPE then satype is mapped to ~0.
|
|
* OUT:
|
|
* 0: invalid satype.
|
|
*/
|
|
static u_int16_t
|
|
key_satype2proto(u_int8_t satype)
|
|
{
|
|
switch (satype) {
|
|
case SADB_SATYPE_UNSPEC:
|
|
return IPSEC_PROTO_ANY;
|
|
case SADB_SATYPE_AH:
|
|
return IPPROTO_AH;
|
|
case SADB_SATYPE_ESP:
|
|
return IPPROTO_ESP;
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
return IPPROTO_IPCOMP;
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
return IPPROTO_TCP;
|
|
default:
|
|
return 0;
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* map IPPROTO_* to SADB_SATYPE_*
|
|
* OUT:
|
|
* 0: invalid protocol type.
|
|
*/
|
|
static u_int8_t
|
|
key_proto2satype(u_int16_t proto)
|
|
{
|
|
switch (proto) {
|
|
case IPPROTO_AH:
|
|
return SADB_SATYPE_AH;
|
|
case IPPROTO_ESP:
|
|
return SADB_SATYPE_ESP;
|
|
case IPPROTO_IPCOMP:
|
|
return SADB_X_SATYPE_IPCOMP;
|
|
case IPPROTO_TCP:
|
|
return SADB_X_SATYPE_TCPSIGNATURE;
|
|
default:
|
|
return 0;
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* %%% PF_KEY */
|
|
/*
|
|
* SADB_GETSPI processing is to receive
|
|
* <base, (SA2), src address, dst address, (SPI range)>
|
|
* from the IKMPd, to assign a unique spi value, to hang on the INBOUND
|
|
* tree with the status of LARVAL, and send
|
|
* <base, SA(*), address(SD)>
|
|
* to the IKMPd.
|
|
*
|
|
* IN: mhp: pointer to the pointer to each header.
|
|
* OUT: NULL if fail.
|
|
* other if success, return pointer to the message to send.
|
|
*/
|
|
static int
|
|
key_getspi(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_address *src0, *dst0;
|
|
struct secasindex saidx;
|
|
struct secashead *newsah;
|
|
struct secasvar *newsav;
|
|
u_int8_t proto;
|
|
u_int32_t spi;
|
|
u_int8_t mode;
|
|
u_int32_t reqid;
|
|
int error;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
|
|
mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
|
|
reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
|
|
} else {
|
|
mode = IPSEC_MODE_ANY;
|
|
reqid = 0;
|
|
}
|
|
|
|
src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
|
|
dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
switch (((struct sockaddr *)(src0 + 1))->sa_family) {
|
|
case AF_INET:
|
|
if (((struct sockaddr *)(src0 + 1))->sa_len !=
|
|
sizeof(struct sockaddr_in))
|
|
return key_senderror(so, m, EINVAL);
|
|
((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
|
|
break;
|
|
case AF_INET6:
|
|
if (((struct sockaddr *)(src0 + 1))->sa_len !=
|
|
sizeof(struct sockaddr_in6))
|
|
return key_senderror(so, m, EINVAL);
|
|
((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
|
|
break;
|
|
default:
|
|
; /*???*/
|
|
}
|
|
switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
|
|
case AF_INET:
|
|
if (((struct sockaddr *)(dst0 + 1))->sa_len !=
|
|
sizeof(struct sockaddr_in))
|
|
return key_senderror(so, m, EINVAL);
|
|
((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
|
|
break;
|
|
case AF_INET6:
|
|
if (((struct sockaddr *)(dst0 + 1))->sa_len !=
|
|
sizeof(struct sockaddr_in6))
|
|
return key_senderror(so, m, EINVAL);
|
|
((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
|
|
break;
|
|
default:
|
|
; /*???*/
|
|
}
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
* We made sure the port numbers are zero above, so we do
|
|
* not have to worry in case we do not update them.
|
|
*/
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL)
|
|
ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__));
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL)
|
|
ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__));
|
|
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
struct sadb_x_nat_t_type *type;
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid nat-t message "
|
|
"passed.\n", __func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port);
|
|
}
|
|
#endif
|
|
|
|
/* SPI allocation */
|
|
spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
|
|
&saidx);
|
|
if (spi == 0)
|
|
return key_senderror(so, m, EINVAL);
|
|
|
|
/* get a SA index */
|
|
if ((newsah = key_getsah(&saidx)) == NULL) {
|
|
/* create a new SA index */
|
|
if ((newsah = key_newsah(&saidx)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
}
|
|
|
|
/* get a new SA */
|
|
/* XXX rewrite */
|
|
newsav = KEY_NEWSAV(m, mhp, newsah, &error);
|
|
if (newsav == NULL) {
|
|
/* XXX don't free new SA index allocated in above. */
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
/* set spi */
|
|
newsav->spi = htonl(spi);
|
|
|
|
/* delete the entry in acqtree */
|
|
if (mhp->msg->sadb_msg_seq != 0) {
|
|
struct secacq *acq;
|
|
if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
|
|
/* reset counter in order to deletion by timehandler. */
|
|
acq->created = time_second;
|
|
acq->count = 0;
|
|
}
|
|
}
|
|
|
|
{
|
|
struct mbuf *n, *nn;
|
|
struct sadb_sa *m_sa;
|
|
struct sadb_msg *newmsg;
|
|
int off, len;
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
|
|
PFKEY_ALIGN8(sizeof(struct sadb_sa));
|
|
|
|
MGETHDR(n, M_NOWAIT, MT_DATA);
|
|
if (len > MHLEN) {
|
|
if (!(MCLGET(n, M_NOWAIT))) {
|
|
m_freem(n);
|
|
n = NULL;
|
|
}
|
|
}
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
n->m_len = len;
|
|
n->m_next = NULL;
|
|
off = 0;
|
|
|
|
m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
|
|
off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
|
|
m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
|
|
m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
|
|
m_sa->sadb_sa_exttype = SADB_EXT_SA;
|
|
m_sa->sadb_sa_spi = htonl(spi);
|
|
off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
|
|
|
|
IPSEC_ASSERT(off == len,
|
|
("length inconsistency (off %u len %u)", off, len));
|
|
|
|
n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
|
|
SADB_EXT_ADDRESS_DST);
|
|
if (!n->m_next) {
|
|
m_freem(n);
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
if (n->m_len < sizeof(struct sadb_msg)) {
|
|
n = m_pullup(n, sizeof(struct sadb_msg));
|
|
if (n == NULL)
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
|
|
}
|
|
|
|
n->m_pkthdr.len = 0;
|
|
for (nn = n; nn; nn = nn->m_next)
|
|
n->m_pkthdr.len += nn->m_len;
|
|
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_seq = newsav->seq;
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* allocating new SPI
|
|
* called by key_getspi().
|
|
* OUT:
|
|
* 0: failure.
|
|
* others: success.
|
|
*/
|
|
static u_int32_t
|
|
key_do_getnewspi(struct sadb_spirange *spirange, struct secasindex *saidx)
|
|
{
|
|
u_int32_t newspi;
|
|
u_int32_t min, max;
|
|
int count = V_key_spi_trycnt;
|
|
|
|
/* set spi range to allocate */
|
|
if (spirange != NULL) {
|
|
min = spirange->sadb_spirange_min;
|
|
max = spirange->sadb_spirange_max;
|
|
} else {
|
|
min = V_key_spi_minval;
|
|
max = V_key_spi_maxval;
|
|
}
|
|
/* IPCOMP needs 2-byte SPI */
|
|
if (saidx->proto == IPPROTO_IPCOMP) {
|
|
u_int32_t t;
|
|
if (min >= 0x10000)
|
|
min = 0xffff;
|
|
if (max >= 0x10000)
|
|
max = 0xffff;
|
|
if (min > max) {
|
|
t = min; min = max; max = t;
|
|
}
|
|
}
|
|
|
|
if (min == max) {
|
|
if (key_checkspidup(saidx, min) != NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n",
|
|
__func__, min));
|
|
return 0;
|
|
}
|
|
|
|
count--; /* taking one cost. */
|
|
newspi = min;
|
|
|
|
} else {
|
|
|
|
/* init SPI */
|
|
newspi = 0;
|
|
|
|
/* when requesting to allocate spi ranged */
|
|
while (count--) {
|
|
/* generate pseudo-random SPI value ranged. */
|
|
newspi = min + (key_random() % (max - min + 1));
|
|
|
|
if (key_checkspidup(saidx, newspi) == NULL)
|
|
break;
|
|
}
|
|
|
|
if (count == 0 || newspi == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n",
|
|
__func__));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* statistics */
|
|
keystat.getspi_count =
|
|
(keystat.getspi_count + V_key_spi_trycnt - count) / 2;
|
|
|
|
return newspi;
|
|
}
|
|
|
|
/*
|
|
* SADB_UPDATE processing
|
|
* receive
|
|
* <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
|
|
* key(AE), (identity(SD),) (sensitivity)>
|
|
* from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
|
|
* and send
|
|
* <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
|
|
* (identity(SD),) (sensitivity)>
|
|
* to the ikmpd.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_sa *sa0;
|
|
struct sadb_address *src0, *dst0;
|
|
#ifdef IPSEC_NAT_T
|
|
struct sadb_x_nat_t_type *type;
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
struct sadb_address *iaddr, *raddr;
|
|
struct sadb_x_nat_t_frag *frag;
|
|
#endif
|
|
struct secasindex saidx;
|
|
struct secashead *sah;
|
|
struct secasvar *sav;
|
|
u_int16_t proto;
|
|
u_int8_t mode;
|
|
u_int32_t reqid;
|
|
int error;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_SA] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
|
|
(mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
|
|
mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
|
|
(mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
|
|
mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
|
|
(mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
|
|
mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
|
|
(mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
|
|
mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
|
|
mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
|
|
reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
|
|
} else {
|
|
mode = IPSEC_MODE_ANY;
|
|
reqid = 0;
|
|
}
|
|
/* XXX boundary checking for other extensions */
|
|
|
|
sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
|
|
src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
|
|
dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
KEY_PORTTOSADDR(&saidx.src, 0);
|
|
KEY_PORTTOSADDR(&saidx.dst, 0);
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
*/
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
type = (struct sadb_x_nat_t_type *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_TYPE];
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
} else {
|
|
type = 0;
|
|
sport = dport = 0;
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) {
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI];
|
|
raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR];
|
|
ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__));
|
|
} else {
|
|
iaddr = raddr = NULL;
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) {
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
frag = (struct sadb_x_nat_t_frag *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_FRAG];
|
|
} else {
|
|
frag = 0;
|
|
}
|
|
#endif
|
|
|
|
/* get a SA header */
|
|
if ((sah = key_getsah(&saidx)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__));
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
|
|
/* set spidx if there */
|
|
/* XXX rewrite */
|
|
error = key_setident(sah, m, mhp);
|
|
if (error)
|
|
return key_senderror(so, m, error);
|
|
|
|
/* find a SA with sequence number. */
|
|
#ifdef IPSEC_DOSEQCHECK
|
|
if (mhp->msg->sadb_msg_seq != 0
|
|
&& (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u "
|
|
"exists.\n", __func__, mhp->msg->sadb_msg_seq));
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
#else
|
|
SAHTREE_LOCK();
|
|
sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
|
|
SAHTREE_UNLOCK();
|
|
if (sav == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n",
|
|
__func__, (u_int32_t)ntohl(sa0->sadb_sa_spi)));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
#endif
|
|
|
|
/* validity check */
|
|
if (sav->sah->saidx.proto != proto) {
|
|
ipseclog((LOG_DEBUG, "%s: protocol mismatched "
|
|
"(DB=%u param=%u)\n", __func__,
|
|
sav->sah->saidx.proto, proto));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
#ifdef IPSEC_DOSEQCHECK
|
|
if (sav->spi != sa0->sadb_sa_spi) {
|
|
ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n",
|
|
__func__,
|
|
(u_int32_t)ntohl(sav->spi),
|
|
(u_int32_t)ntohl(sa0->sadb_sa_spi)));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
#endif
|
|
if (sav->pid != mhp->msg->sadb_msg_pid) {
|
|
ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n",
|
|
__func__, sav->pid, mhp->msg->sadb_msg_pid));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* copy sav values */
|
|
error = key_setsaval(sav, m, mhp);
|
|
if (error) {
|
|
KEY_FREESAV(&sav);
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle more NAT-T info if present,
|
|
* now that we have a sav to fill.
|
|
*/
|
|
if (type)
|
|
sav->natt_type = type->sadb_x_nat_t_type_type;
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&sav->sah->saidx.src,
|
|
sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&sav->sah->saidx.dst,
|
|
dport->sadb_x_nat_t_port_port);
|
|
|
|
#if 0
|
|
/*
|
|
* In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0.
|
|
* We should actually check for a minimum MTU here, if we
|
|
* want to support it in ip_output.
|
|
*/
|
|
if (frag)
|
|
sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen;
|
|
#endif
|
|
#endif
|
|
|
|
/* check SA values to be mature. */
|
|
if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
|
|
KEY_FREESAV(&sav);
|
|
return key_senderror(so, m, 0);
|
|
}
|
|
|
|
{
|
|
struct mbuf *n;
|
|
|
|
/* set msg buf from mhp */
|
|
n = key_getmsgbuf_x1(m, mhp);
|
|
if (n == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
|
|
* only called by key_update().
|
|
* OUT:
|
|
* NULL : not found
|
|
* others : found, pointer to a SA.
|
|
*/
|
|
#ifdef IPSEC_DOSEQCHECK
|
|
static struct secasvar *
|
|
key_getsavbyseq(struct secashead *sah, u_int32_t seq)
|
|
{
|
|
struct secasvar *sav;
|
|
u_int state;
|
|
|
|
state = SADB_SASTATE_LARVAL;
|
|
|
|
/* search SAD with sequence number ? */
|
|
LIST_FOREACH(sav, &sah->savtree[state], chain) {
|
|
|
|
KEY_CHKSASTATE(state, sav->state, __func__);
|
|
|
|
if (sav->seq == seq) {
|
|
sa_addref(sav);
|
|
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
|
|
printf("DP %s cause refcnt++:%d SA:%p\n",
|
|
__func__, sav->refcnt, sav));
|
|
return sav;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* SADB_ADD processing
|
|
* add an entry to SA database, when received
|
|
* <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
|
|
* key(AE), (identity(SD),) (sensitivity)>
|
|
* from the ikmpd,
|
|
* and send
|
|
* <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
|
|
* (identity(SD),) (sensitivity)>
|
|
* to the ikmpd.
|
|
*
|
|
* IGNORE identity and sensitivity messages.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_add(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_sa *sa0;
|
|
struct sadb_address *src0, *dst0;
|
|
#ifdef IPSEC_NAT_T
|
|
struct sadb_x_nat_t_type *type;
|
|
struct sadb_address *iaddr, *raddr;
|
|
struct sadb_x_nat_t_frag *frag;
|
|
#endif
|
|
struct secasindex saidx;
|
|
struct secashead *newsah;
|
|
struct secasvar *newsav;
|
|
u_int16_t proto;
|
|
u_int8_t mode;
|
|
u_int32_t reqid;
|
|
int error;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_SA] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
|
|
(mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
|
|
mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
|
|
(mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
|
|
mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
|
|
(mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
|
|
mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
|
|
(mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
|
|
mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
|
|
/* XXX need more */
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
|
|
mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
|
|
reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
|
|
} else {
|
|
mode = IPSEC_MODE_ANY;
|
|
reqid = 0;
|
|
}
|
|
|
|
sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
|
|
src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
|
|
dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
KEY_PORTTOSADDR(&saidx.src, 0);
|
|
KEY_PORTTOSADDR(&saidx.dst, 0);
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
*/
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
type = (struct sadb_x_nat_t_type *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_TYPE];
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&saidx.src,
|
|
sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&saidx.dst,
|
|
dport->sadb_x_nat_t_port_port);
|
|
} else {
|
|
type = 0;
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) {
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI];
|
|
raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR];
|
|
ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__));
|
|
} else {
|
|
iaddr = raddr = NULL;
|
|
}
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) {
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
frag = (struct sadb_x_nat_t_frag *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_FRAG];
|
|
} else {
|
|
frag = 0;
|
|
}
|
|
#endif
|
|
|
|
/* get a SA header */
|
|
if ((newsah = key_getsah(&saidx)) == NULL) {
|
|
/* create a new SA header */
|
|
if ((newsah = key_newsah(&saidx)) == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
}
|
|
|
|
/* set spidx if there */
|
|
/* XXX rewrite */
|
|
error = key_setident(newsah, m, mhp);
|
|
if (error) {
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
/* create new SA entry. */
|
|
/* We can create new SA only if SPI is differenct. */
|
|
SAHTREE_LOCK();
|
|
newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi);
|
|
SAHTREE_UNLOCK();
|
|
if (newsav != NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__));
|
|
return key_senderror(so, m, EEXIST);
|
|
}
|
|
newsav = KEY_NEWSAV(m, mhp, newsah, &error);
|
|
if (newsav == NULL) {
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle more NAT-T info if present,
|
|
* now that we have a sav to fill.
|
|
*/
|
|
if (type)
|
|
newsav->natt_type = type->sadb_x_nat_t_type_type;
|
|
|
|
#if 0
|
|
/*
|
|
* In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0.
|
|
* We should actually check for a minimum MTU here, if we
|
|
* want to support it in ip_output.
|
|
*/
|
|
if (frag)
|
|
newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen;
|
|
#endif
|
|
#endif
|
|
|
|
/* check SA values to be mature. */
|
|
if ((error = key_mature(newsav)) != 0) {
|
|
KEY_FREESAV(&newsav);
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
/*
|
|
* don't call key_freesav() here, as we would like to keep the SA
|
|
* in the database on success.
|
|
*/
|
|
|
|
{
|
|
struct mbuf *n;
|
|
|
|
/* set msg buf from mhp */
|
|
n = key_getmsgbuf_x1(m, mhp);
|
|
if (n == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/* m is retained */
|
|
static int
|
|
key_setident(struct secashead *sah, struct mbuf *m,
|
|
const struct sadb_msghdr *mhp)
|
|
{
|
|
const struct sadb_ident *idsrc, *iddst;
|
|
int idsrclen, iddstlen;
|
|
|
|
IPSEC_ASSERT(sah != NULL, ("null secashead"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* don't make buffer if not there */
|
|
if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
|
|
mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
|
|
sah->idents = NULL;
|
|
sah->identd = NULL;
|
|
return 0;
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__));
|
|
return EINVAL;
|
|
}
|
|
|
|
idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
|
|
iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
|
|
idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
|
|
iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
|
|
|
|
/* validity check */
|
|
if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
|
|
ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__));
|
|
return EINVAL;
|
|
}
|
|
|
|
switch (idsrc->sadb_ident_type) {
|
|
case SADB_IDENTTYPE_PREFIX:
|
|
case SADB_IDENTTYPE_FQDN:
|
|
case SADB_IDENTTYPE_USERFQDN:
|
|
default:
|
|
/* XXX do nothing */
|
|
sah->idents = NULL;
|
|
sah->identd = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* make structure */
|
|
sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
|
|
if (sah->idents == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return ENOBUFS;
|
|
}
|
|
sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
|
|
if (sah->identd == NULL) {
|
|
free(sah->idents, M_IPSEC_MISC);
|
|
sah->idents = NULL;
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return ENOBUFS;
|
|
}
|
|
sah->idents->type = idsrc->sadb_ident_type;
|
|
sah->idents->id = idsrc->sadb_ident_id;
|
|
|
|
sah->identd->type = iddst->sadb_ident_type;
|
|
sah->identd->id = iddst->sadb_ident_id;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* m will not be freed on return.
|
|
* it is caller's responsibility to free the result.
|
|
*/
|
|
static struct mbuf *
|
|
key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct mbuf *n;
|
|
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* create new sadb_msg to reply. */
|
|
n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
|
|
SADB_EXT_SA, SADB_X_EXT_SA2,
|
|
SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
|
|
SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
|
|
SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
|
|
if (!n)
|
|
return NULL;
|
|
|
|
if (n->m_len < sizeof(struct sadb_msg)) {
|
|
n = m_pullup(n, sizeof(struct sadb_msg));
|
|
if (n == NULL)
|
|
return NULL;
|
|
}
|
|
mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
|
|
mtod(n, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* SADB_DELETE processing
|
|
* receive
|
|
* <base, SA(*), address(SD)>
|
|
* from the ikmpd, and set SADB_SASTATE_DEAD,
|
|
* and send,
|
|
* <base, SA(*), address(SD)>
|
|
* to the ikmpd.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_delete(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_sa *sa0;
|
|
struct sadb_address *src0, *dst0;
|
|
struct secasindex saidx;
|
|
struct secashead *sah;
|
|
struct secasvar *sav = NULL;
|
|
u_int16_t proto;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_SA] == NULL) {
|
|
/*
|
|
* Caller wants us to delete all non-LARVAL SAs
|
|
* that match the src/dst. This is used during
|
|
* IKE INITIAL-CONTACT.
|
|
*/
|
|
ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__));
|
|
return key_delete_all(so, m, mhp, proto);
|
|
} else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
|
|
src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
|
|
dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
KEY_PORTTOSADDR(&saidx.src, 0);
|
|
KEY_PORTTOSADDR(&saidx.dst, 0);
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
*/
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&saidx.src,
|
|
sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&saidx.dst,
|
|
dport->sadb_x_nat_t_port_port);
|
|
}
|
|
#endif
|
|
|
|
/* get a SA header */
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (sah->state == SADB_SASTATE_DEAD)
|
|
continue;
|
|
if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
|
|
continue;
|
|
|
|
/* get a SA with SPI. */
|
|
sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
|
|
if (sav)
|
|
break;
|
|
}
|
|
if (sah == NULL) {
|
|
SAHTREE_UNLOCK();
|
|
ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__));
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
|
|
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
|
|
KEY_FREESAV(&sav);
|
|
SAHTREE_UNLOCK();
|
|
|
|
{
|
|
struct mbuf *n;
|
|
struct sadb_msg *newmsg;
|
|
|
|
/* create new sadb_msg to reply. */
|
|
/* XXX-BZ NAT-T extensions? */
|
|
n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
|
|
SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
if (n->m_len < sizeof(struct sadb_msg)) {
|
|
n = m_pullup(n, sizeof(struct sadb_msg));
|
|
if (n == NULL)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* delete all SAs for src/dst. Called from key_delete().
|
|
*/
|
|
static int
|
|
key_delete_all(struct socket *so, struct mbuf *m,
|
|
const struct sadb_msghdr *mhp, u_int16_t proto)
|
|
{
|
|
struct sadb_address *src0, *dst0;
|
|
struct secasindex saidx;
|
|
struct secashead *sah;
|
|
struct secasvar *sav, *nextsav;
|
|
u_int stateidx, state;
|
|
|
|
src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
|
|
dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
KEY_PORTTOSADDR(&saidx.src, 0);
|
|
KEY_PORTTOSADDR(&saidx.dst, 0);
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
*/
|
|
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&saidx.src,
|
|
sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&saidx.dst,
|
|
dport->sadb_x_nat_t_port_port);
|
|
}
|
|
#endif
|
|
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (sah->state == SADB_SASTATE_DEAD)
|
|
continue;
|
|
if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
|
|
continue;
|
|
|
|
/* Delete all non-LARVAL SAs. */
|
|
for (stateidx = 0;
|
|
stateidx < _ARRAYLEN(saorder_state_alive);
|
|
stateidx++) {
|
|
state = saorder_state_alive[stateidx];
|
|
if (state == SADB_SASTATE_LARVAL)
|
|
continue;
|
|
for (sav = LIST_FIRST(&sah->savtree[state]);
|
|
sav != NULL; sav = nextsav) {
|
|
nextsav = LIST_NEXT(sav, chain);
|
|
/* sanity check */
|
|
if (sav->state != state) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid "
|
|
"sav->state (queue %d SA %d)\n",
|
|
__func__, state, sav->state));
|
|
continue;
|
|
}
|
|
|
|
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
|
|
KEY_FREESAV(&sav);
|
|
}
|
|
}
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
{
|
|
struct mbuf *n;
|
|
struct sadb_msg *newmsg;
|
|
|
|
/* create new sadb_msg to reply. */
|
|
/* XXX-BZ NAT-T extensions? */
|
|
n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
|
|
SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
if (n->m_len < sizeof(struct sadb_msg)) {
|
|
n = m_pullup(n, sizeof(struct sadb_msg));
|
|
if (n == NULL)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* SADB_GET processing
|
|
* receive
|
|
* <base, SA(*), address(SD)>
|
|
* from the ikmpd, and get a SP and a SA to respond,
|
|
* and send,
|
|
* <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
|
|
* (identity(SD),) (sensitivity)>
|
|
* to the ikmpd.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_sa *sa0;
|
|
struct sadb_address *src0, *dst0;
|
|
struct secasindex saidx;
|
|
struct secashead *sah;
|
|
struct secasvar *sav = NULL;
|
|
u_int16_t proto;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_SA] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
|
|
src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
|
|
dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
KEY_PORTTOSADDR(&saidx.src, 0);
|
|
KEY_PORTTOSADDR(&saidx.dst, 0);
|
|
|
|
#ifdef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
*/
|
|
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&saidx.src,
|
|
sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&saidx.dst,
|
|
dport->sadb_x_nat_t_port_port);
|
|
}
|
|
#endif
|
|
|
|
/* get a SA header */
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (sah->state == SADB_SASTATE_DEAD)
|
|
continue;
|
|
if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
|
|
continue;
|
|
|
|
/* get a SA with SPI. */
|
|
sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
|
|
if (sav)
|
|
break;
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
if (sah == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__));
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
|
|
{
|
|
struct mbuf *n;
|
|
u_int8_t satype;
|
|
|
|
/* map proto to satype */
|
|
if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* create new sadb_msg to reply. */
|
|
n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
|
|
mhp->msg->sadb_msg_pid);
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
|
|
}
|
|
}
|
|
|
|
/* XXX make it sysctl-configurable? */
|
|
static void
|
|
key_getcomb_setlifetime(struct sadb_comb *comb)
|
|
{
|
|
|
|
comb->sadb_comb_soft_allocations = 1;
|
|
comb->sadb_comb_hard_allocations = 1;
|
|
comb->sadb_comb_soft_bytes = 0;
|
|
comb->sadb_comb_hard_bytes = 0;
|
|
comb->sadb_comb_hard_addtime = 86400; /* 1 day */
|
|
comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
|
|
comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
|
|
comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
|
|
}
|
|
|
|
/*
|
|
* XXX reorder combinations by preference
|
|
* XXX no idea if the user wants ESP authentication or not
|
|
*/
|
|
static struct mbuf *
|
|
key_getcomb_esp()
|
|
{
|
|
struct sadb_comb *comb;
|
|
struct enc_xform *algo;
|
|
struct mbuf *result = NULL, *m, *n;
|
|
int encmin;
|
|
int i, off, o;
|
|
int totlen;
|
|
const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
|
|
|
|
m = NULL;
|
|
for (i = 1; i <= SADB_EALG_MAX; i++) {
|
|
algo = esp_algorithm_lookup(i);
|
|
if (algo == NULL)
|
|
continue;
|
|
|
|
/* discard algorithms with key size smaller than system min */
|
|
if (_BITS(algo->maxkey) < V_ipsec_esp_keymin)
|
|
continue;
|
|
if (_BITS(algo->minkey) < V_ipsec_esp_keymin)
|
|
encmin = V_ipsec_esp_keymin;
|
|
else
|
|
encmin = _BITS(algo->minkey);
|
|
|
|
if (V_ipsec_esp_auth)
|
|
m = key_getcomb_ah();
|
|
else {
|
|
IPSEC_ASSERT(l <= MLEN,
|
|
("l=%u > MLEN=%lu", l, (u_long) MLEN));
|
|
MGET(m, M_NOWAIT, MT_DATA);
|
|
if (m) {
|
|
M_ALIGN(m, l);
|
|
m->m_len = l;
|
|
m->m_next = NULL;
|
|
bzero(mtod(m, caddr_t), m->m_len);
|
|
}
|
|
}
|
|
if (!m)
|
|
goto fail;
|
|
|
|
totlen = 0;
|
|
for (n = m; n; n = n->m_next)
|
|
totlen += n->m_len;
|
|
IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l));
|
|
|
|
for (off = 0; off < totlen; off += l) {
|
|
n = m_pulldown(m, off, l, &o);
|
|
if (!n) {
|
|
/* m is already freed */
|
|
goto fail;
|
|
}
|
|
comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
|
|
bzero(comb, sizeof(*comb));
|
|
key_getcomb_setlifetime(comb);
|
|
comb->sadb_comb_encrypt = i;
|
|
comb->sadb_comb_encrypt_minbits = encmin;
|
|
comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey);
|
|
}
|
|
|
|
if (!result)
|
|
result = m;
|
|
else
|
|
m_cat(result, m);
|
|
}
|
|
|
|
return result;
|
|
|
|
fail:
|
|
if (result)
|
|
m_freem(result);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
key_getsizes_ah(const struct auth_hash *ah, int alg, u_int16_t* min,
|
|
u_int16_t* max)
|
|
{
|
|
|
|
*min = *max = ah->keysize;
|
|
if (ah->keysize == 0) {
|
|
/*
|
|
* Transform takes arbitrary key size but algorithm
|
|
* key size is restricted. Enforce this here.
|
|
*/
|
|
switch (alg) {
|
|
case SADB_X_AALG_MD5: *min = *max = 16; break;
|
|
case SADB_X_AALG_SHA: *min = *max = 20; break;
|
|
case SADB_X_AALG_NULL: *min = 1; *max = 256; break;
|
|
case SADB_X_AALG_SHA2_256: *min = *max = 32; break;
|
|
case SADB_X_AALG_SHA2_384: *min = *max = 48; break;
|
|
case SADB_X_AALG_SHA2_512: *min = *max = 64; break;
|
|
default:
|
|
DPRINTF(("%s: unknown AH algorithm %u\n",
|
|
__func__, alg));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* XXX reorder combinations by preference
|
|
*/
|
|
static struct mbuf *
|
|
key_getcomb_ah()
|
|
{
|
|
struct sadb_comb *comb;
|
|
struct auth_hash *algo;
|
|
struct mbuf *m;
|
|
u_int16_t minkeysize, maxkeysize;
|
|
int i;
|
|
const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
|
|
|
|
m = NULL;
|
|
for (i = 1; i <= SADB_AALG_MAX; i++) {
|
|
#if 1
|
|
/* we prefer HMAC algorithms, not old algorithms */
|
|
if (i != SADB_AALG_SHA1HMAC &&
|
|
i != SADB_AALG_MD5HMAC &&
|
|
i != SADB_X_AALG_SHA2_256 &&
|
|
i != SADB_X_AALG_SHA2_384 &&
|
|
i != SADB_X_AALG_SHA2_512)
|
|
continue;
|
|
#endif
|
|
algo = ah_algorithm_lookup(i);
|
|
if (!algo)
|
|
continue;
|
|
key_getsizes_ah(algo, i, &minkeysize, &maxkeysize);
|
|
/* discard algorithms with key size smaller than system min */
|
|
if (_BITS(minkeysize) < V_ipsec_ah_keymin)
|
|
continue;
|
|
|
|
if (!m) {
|
|
IPSEC_ASSERT(l <= MLEN,
|
|
("l=%u > MLEN=%lu", l, (u_long) MLEN));
|
|
MGET(m, M_NOWAIT, MT_DATA);
|
|
if (m) {
|
|
M_ALIGN(m, l);
|
|
m->m_len = l;
|
|
m->m_next = NULL;
|
|
}
|
|
} else
|
|
M_PREPEND(m, l, M_NOWAIT);
|
|
if (!m)
|
|
return NULL;
|
|
|
|
comb = mtod(m, struct sadb_comb *);
|
|
bzero(comb, sizeof(*comb));
|
|
key_getcomb_setlifetime(comb);
|
|
comb->sadb_comb_auth = i;
|
|
comb->sadb_comb_auth_minbits = _BITS(minkeysize);
|
|
comb->sadb_comb_auth_maxbits = _BITS(maxkeysize);
|
|
}
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* not really an official behavior. discussed in pf_key@inner.net in Sep2000.
|
|
* XXX reorder combinations by preference
|
|
*/
|
|
static struct mbuf *
|
|
key_getcomb_ipcomp()
|
|
{
|
|
struct sadb_comb *comb;
|
|
struct comp_algo *algo;
|
|
struct mbuf *m;
|
|
int i;
|
|
const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
|
|
|
|
m = NULL;
|
|
for (i = 1; i <= SADB_X_CALG_MAX; i++) {
|
|
algo = ipcomp_algorithm_lookup(i);
|
|
if (!algo)
|
|
continue;
|
|
|
|
if (!m) {
|
|
IPSEC_ASSERT(l <= MLEN,
|
|
("l=%u > MLEN=%lu", l, (u_long) MLEN));
|
|
MGET(m, M_NOWAIT, MT_DATA);
|
|
if (m) {
|
|
M_ALIGN(m, l);
|
|
m->m_len = l;
|
|
m->m_next = NULL;
|
|
}
|
|
} else
|
|
M_PREPEND(m, l, M_NOWAIT);
|
|
if (!m)
|
|
return NULL;
|
|
|
|
comb = mtod(m, struct sadb_comb *);
|
|
bzero(comb, sizeof(*comb));
|
|
key_getcomb_setlifetime(comb);
|
|
comb->sadb_comb_encrypt = i;
|
|
/* what should we set into sadb_comb_*_{min,max}bits? */
|
|
}
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* XXX no way to pass mode (transport/tunnel) to userland
|
|
* XXX replay checking?
|
|
* XXX sysctl interface to ipsec_{ah,esp}_keymin
|
|
*/
|
|
static struct mbuf *
|
|
key_getprop(const struct secasindex *saidx)
|
|
{
|
|
struct sadb_prop *prop;
|
|
struct mbuf *m, *n;
|
|
const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
|
|
int totlen;
|
|
|
|
switch (saidx->proto) {
|
|
case IPPROTO_ESP:
|
|
m = key_getcomb_esp();
|
|
break;
|
|
case IPPROTO_AH:
|
|
m = key_getcomb_ah();
|
|
break;
|
|
case IPPROTO_IPCOMP:
|
|
m = key_getcomb_ipcomp();
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
if (!m)
|
|
return NULL;
|
|
M_PREPEND(m, l, M_NOWAIT);
|
|
if (!m)
|
|
return NULL;
|
|
|
|
totlen = 0;
|
|
for (n = m; n; n = n->m_next)
|
|
totlen += n->m_len;
|
|
|
|
prop = mtod(m, struct sadb_prop *);
|
|
bzero(prop, sizeof(*prop));
|
|
prop->sadb_prop_len = PFKEY_UNIT64(totlen);
|
|
prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
|
|
prop->sadb_prop_replay = 32; /* XXX */
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
|
|
* send
|
|
* <base, SA, address(SD), (address(P)), x_policy,
|
|
* (identity(SD),) (sensitivity,) proposal>
|
|
* to KMD, and expect to receive
|
|
* <base> with SADB_ACQUIRE if error occured,
|
|
* or
|
|
* <base, src address, dst address, (SPI range)> with SADB_GETSPI
|
|
* from KMD by PF_KEY.
|
|
*
|
|
* XXX x_policy is outside of RFC2367 (KAME extension).
|
|
* XXX sensitivity is not supported.
|
|
* XXX for ipcomp, RFC2367 does not define how to fill in proposal.
|
|
* see comment for key_getcomb_ipcomp().
|
|
*
|
|
* OUT:
|
|
* 0 : succeed
|
|
* others: error number
|
|
*/
|
|
static int
|
|
key_acquire(const struct secasindex *saidx, struct secpolicy *sp)
|
|
{
|
|
struct mbuf *result = NULL, *m;
|
|
struct secacq *newacq;
|
|
u_int8_t satype;
|
|
int error = -1;
|
|
u_int32_t seq;
|
|
|
|
IPSEC_ASSERT(saidx != NULL, ("null saidx"));
|
|
satype = key_proto2satype(saidx->proto);
|
|
IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto));
|
|
|
|
/*
|
|
* We never do anything about acquirng SA. There is anather
|
|
* solution that kernel blocks to send SADB_ACQUIRE message until
|
|
* getting something message from IKEd. In later case, to be
|
|
* managed with ACQUIRING list.
|
|
*/
|
|
/* Get an entry to check whether sending message or not. */
|
|
if ((newacq = key_getacq(saidx)) != NULL) {
|
|
if (V_key_blockacq_count < newacq->count) {
|
|
/* reset counter and do send message. */
|
|
newacq->count = 0;
|
|
} else {
|
|
/* increment counter and do nothing. */
|
|
newacq->count++;
|
|
return 0;
|
|
}
|
|
} else {
|
|
/* make new entry for blocking to send SADB_ACQUIRE. */
|
|
if ((newacq = key_newacq(saidx)) == NULL)
|
|
return ENOBUFS;
|
|
}
|
|
|
|
|
|
seq = newacq->seq;
|
|
m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
result = m;
|
|
|
|
/*
|
|
* No SADB_X_EXT_NAT_T_* here: we do not know
|
|
* anything related to NAT-T at this time.
|
|
*/
|
|
|
|
/* set sadb_address for saidx's. */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
|
|
&saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
|
|
&saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* XXX proxy address (optional) */
|
|
|
|
/* set sadb_x_policy */
|
|
if (sp) {
|
|
m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
}
|
|
|
|
/* XXX identity (optional) */
|
|
#if 0
|
|
if (idexttype && fqdn) {
|
|
/* create identity extension (FQDN) */
|
|
struct sadb_ident *id;
|
|
int fqdnlen;
|
|
|
|
fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
|
|
id = (struct sadb_ident *)p;
|
|
bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
|
|
id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
|
|
id->sadb_ident_exttype = idexttype;
|
|
id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
|
|
bcopy(fqdn, id + 1, fqdnlen);
|
|
p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
|
|
}
|
|
|
|
if (idexttype) {
|
|
/* create identity extension (USERFQDN) */
|
|
struct sadb_ident *id;
|
|
int userfqdnlen;
|
|
|
|
if (userfqdn) {
|
|
/* +1 for terminating-NUL */
|
|
userfqdnlen = strlen(userfqdn) + 1;
|
|
} else
|
|
userfqdnlen = 0;
|
|
id = (struct sadb_ident *)p;
|
|
bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
|
|
id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
|
|
id->sadb_ident_exttype = idexttype;
|
|
id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
|
|
/* XXX is it correct? */
|
|
if (curproc && curproc->p_cred)
|
|
id->sadb_ident_id = curproc->p_cred->p_ruid;
|
|
if (userfqdn && userfqdnlen)
|
|
bcopy(userfqdn, id + 1, userfqdnlen);
|
|
p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
|
|
}
|
|
#endif
|
|
|
|
/* XXX sensitivity (optional) */
|
|
|
|
/* create proposal/combination extension */
|
|
m = key_getprop(saidx);
|
|
#if 0
|
|
/*
|
|
* spec conformant: always attach proposal/combination extension,
|
|
* the problem is that we have no way to attach it for ipcomp,
|
|
* due to the way sadb_comb is declared in RFC2367.
|
|
*/
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
#else
|
|
/*
|
|
* outside of spec; make proposal/combination extension optional.
|
|
*/
|
|
if (m)
|
|
m_cat(result, m);
|
|
#endif
|
|
|
|
if ((result->m_flags & M_PKTHDR) == 0) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
if (result->m_len < sizeof(struct sadb_msg)) {
|
|
result = m_pullup(result, sizeof(struct sadb_msg));
|
|
if (result == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
|
|
|
|
fail:
|
|
if (result)
|
|
m_freem(result);
|
|
return error;
|
|
}
|
|
|
|
static struct secacq *
|
|
key_newacq(const struct secasindex *saidx)
|
|
{
|
|
struct secacq *newacq;
|
|
|
|
/* get new entry */
|
|
newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO);
|
|
if (newacq == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return NULL;
|
|
}
|
|
|
|
/* copy secindex */
|
|
bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
|
|
newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq);
|
|
newacq->created = time_second;
|
|
newacq->count = 0;
|
|
|
|
/* add to acqtree */
|
|
ACQ_LOCK();
|
|
LIST_INSERT_HEAD(&V_acqtree, newacq, chain);
|
|
ACQ_UNLOCK();
|
|
|
|
return newacq;
|
|
}
|
|
|
|
static struct secacq *
|
|
key_getacq(const struct secasindex *saidx)
|
|
{
|
|
struct secacq *acq;
|
|
|
|
ACQ_LOCK();
|
|
LIST_FOREACH(acq, &V_acqtree, chain) {
|
|
if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
|
|
break;
|
|
}
|
|
ACQ_UNLOCK();
|
|
|
|
return acq;
|
|
}
|
|
|
|
static struct secacq *
|
|
key_getacqbyseq(u_int32_t seq)
|
|
{
|
|
struct secacq *acq;
|
|
|
|
ACQ_LOCK();
|
|
LIST_FOREACH(acq, &V_acqtree, chain) {
|
|
if (acq->seq == seq)
|
|
break;
|
|
}
|
|
ACQ_UNLOCK();
|
|
|
|
return acq;
|
|
}
|
|
|
|
static struct secspacq *
|
|
key_newspacq(struct secpolicyindex *spidx)
|
|
{
|
|
struct secspacq *acq;
|
|
|
|
/* get new entry */
|
|
acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO);
|
|
if (acq == NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return NULL;
|
|
}
|
|
|
|
/* copy secindex */
|
|
bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
|
|
acq->created = time_second;
|
|
acq->count = 0;
|
|
|
|
/* add to spacqtree */
|
|
SPACQ_LOCK();
|
|
LIST_INSERT_HEAD(&V_spacqtree, acq, chain);
|
|
SPACQ_UNLOCK();
|
|
|
|
return acq;
|
|
}
|
|
|
|
static struct secspacq *
|
|
key_getspacq(struct secpolicyindex *spidx)
|
|
{
|
|
struct secspacq *acq;
|
|
|
|
SPACQ_LOCK();
|
|
LIST_FOREACH(acq, &V_spacqtree, chain) {
|
|
if (key_cmpspidx_exactly(spidx, &acq->spidx)) {
|
|
/* NB: return holding spacq_lock */
|
|
return acq;
|
|
}
|
|
}
|
|
SPACQ_UNLOCK();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* SADB_ACQUIRE processing,
|
|
* in first situation, is receiving
|
|
* <base>
|
|
* from the ikmpd, and clear sequence of its secasvar entry.
|
|
*
|
|
* In second situation, is receiving
|
|
* <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
|
|
* from a user land process, and return
|
|
* <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
|
|
* to the socket.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_acquire2(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
const struct sadb_address *src0, *dst0;
|
|
struct secasindex saidx;
|
|
struct secashead *sah;
|
|
u_int16_t proto;
|
|
int error;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/*
|
|
* Error message from KMd.
|
|
* We assume that if error was occured in IKEd, the length of PFKEY
|
|
* message is equal to the size of sadb_msg structure.
|
|
* We do not raise error even if error occured in this function.
|
|
*/
|
|
if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
|
|
struct secacq *acq;
|
|
|
|
/* check sequence number */
|
|
if (mhp->msg->sadb_msg_seq == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: must specify sequence "
|
|
"number.\n", __func__));
|
|
m_freem(m);
|
|
return 0;
|
|
}
|
|
|
|
if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
|
|
/*
|
|
* the specified larval SA is already gone, or we got
|
|
* a bogus sequence number. we can silently ignore it.
|
|
*/
|
|
m_freem(m);
|
|
return 0;
|
|
}
|
|
|
|
/* reset acq counter in order to deletion by timehander. */
|
|
acq->created = time_second;
|
|
acq->count = 0;
|
|
m_freem(m);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This message is from user land.
|
|
*/
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
|
|
mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
|
|
mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
|
|
/* error */
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
|
|
mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
|
|
/* error */
|
|
ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
|
|
dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
|
|
|
|
/* XXX boundary check against sa_len */
|
|
KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
|
|
|
|
/*
|
|
* Make sure the port numbers are zero.
|
|
* In case of NAT-T we will update them later if needed.
|
|
*/
|
|
KEY_PORTTOSADDR(&saidx.src, 0);
|
|
KEY_PORTTOSADDR(&saidx.dst, 0);
|
|
|
|
#ifndef IPSEC_NAT_T
|
|
/*
|
|
* Handle NAT-T info if present.
|
|
*/
|
|
|
|
if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
|
|
struct sadb_x_nat_t_port *sport, *dport;
|
|
|
|
if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
|
|
mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
sport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_SPORT];
|
|
dport = (struct sadb_x_nat_t_port *)
|
|
mhp->ext[SADB_X_EXT_NAT_T_DPORT];
|
|
|
|
if (sport)
|
|
KEY_PORTTOSADDR(&saidx.src,
|
|
sport->sadb_x_nat_t_port_port);
|
|
if (dport)
|
|
KEY_PORTTOSADDR(&saidx.dst,
|
|
dport->sadb_x_nat_t_port_port);
|
|
}
|
|
#endif
|
|
|
|
/* get a SA index */
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (sah->state == SADB_SASTATE_DEAD)
|
|
continue;
|
|
if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
|
|
break;
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
if (sah != NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__));
|
|
return key_senderror(so, m, EEXIST);
|
|
}
|
|
|
|
error = key_acquire(&saidx, NULL);
|
|
if (error != 0) {
|
|
ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n",
|
|
__func__, mhp->msg->sadb_msg_errno));
|
|
return key_senderror(so, m, error);
|
|
}
|
|
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
|
|
}
|
|
|
|
/*
|
|
* SADB_REGISTER processing.
|
|
* If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
|
|
* receive
|
|
* <base>
|
|
* from the ikmpd, and register a socket to send PF_KEY messages,
|
|
* and send
|
|
* <base, supported>
|
|
* to KMD by PF_KEY.
|
|
* If socket is detached, must free from regnode.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_register(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct secreg *reg, *newreg = 0;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* check for invalid register message */
|
|
if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0]))
|
|
return key_senderror(so, m, EINVAL);
|
|
|
|
/* When SATYPE_UNSPEC is specified, only return sabd_supported. */
|
|
if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
|
|
goto setmsg;
|
|
|
|
/* check whether existing or not */
|
|
REGTREE_LOCK();
|
|
LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) {
|
|
if (reg->so == so) {
|
|
REGTREE_UNLOCK();
|
|
ipseclog((LOG_DEBUG, "%s: socket exists already.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EEXIST);
|
|
}
|
|
}
|
|
|
|
/* create regnode */
|
|
newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO);
|
|
if (newreg == NULL) {
|
|
REGTREE_UNLOCK();
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
newreg->so = so;
|
|
((struct keycb *)sotorawcb(so))->kp_registered++;
|
|
|
|
/* add regnode to regtree. */
|
|
LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain);
|
|
REGTREE_UNLOCK();
|
|
|
|
setmsg:
|
|
{
|
|
struct mbuf *n;
|
|
struct sadb_msg *newmsg;
|
|
struct sadb_supported *sup;
|
|
u_int len, alen, elen;
|
|
int off;
|
|
int i;
|
|
struct sadb_alg *alg;
|
|
|
|
/* create new sadb_msg to reply. */
|
|
alen = 0;
|
|
for (i = 1; i <= SADB_AALG_MAX; i++) {
|
|
if (ah_algorithm_lookup(i))
|
|
alen += sizeof(struct sadb_alg);
|
|
}
|
|
if (alen)
|
|
alen += sizeof(struct sadb_supported);
|
|
elen = 0;
|
|
for (i = 1; i <= SADB_EALG_MAX; i++) {
|
|
if (esp_algorithm_lookup(i))
|
|
elen += sizeof(struct sadb_alg);
|
|
}
|
|
if (elen)
|
|
elen += sizeof(struct sadb_supported);
|
|
|
|
len = sizeof(struct sadb_msg) + alen + elen;
|
|
|
|
if (len > MCLBYTES)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
MGETHDR(n, M_NOWAIT, MT_DATA);
|
|
if (len > MHLEN) {
|
|
if (!(MCLGET(n, M_NOWAIT))) {
|
|
m_freem(n);
|
|
n = NULL;
|
|
}
|
|
}
|
|
if (!n)
|
|
return key_senderror(so, m, ENOBUFS);
|
|
|
|
n->m_pkthdr.len = n->m_len = len;
|
|
n->m_next = NULL;
|
|
off = 0;
|
|
|
|
m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
|
|
newmsg = mtod(n, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
|
|
off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
|
|
|
|
/* for authentication algorithm */
|
|
if (alen) {
|
|
sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
|
|
sup->sadb_supported_len = PFKEY_UNIT64(alen);
|
|
sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
|
|
off += PFKEY_ALIGN8(sizeof(*sup));
|
|
|
|
for (i = 1; i <= SADB_AALG_MAX; i++) {
|
|
struct auth_hash *aalgo;
|
|
u_int16_t minkeysize, maxkeysize;
|
|
|
|
aalgo = ah_algorithm_lookup(i);
|
|
if (!aalgo)
|
|
continue;
|
|
alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
|
|
alg->sadb_alg_id = i;
|
|
alg->sadb_alg_ivlen = 0;
|
|
key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize);
|
|
alg->sadb_alg_minbits = _BITS(minkeysize);
|
|
alg->sadb_alg_maxbits = _BITS(maxkeysize);
|
|
off += PFKEY_ALIGN8(sizeof(*alg));
|
|
}
|
|
}
|
|
|
|
/* for encryption algorithm */
|
|
if (elen) {
|
|
sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
|
|
sup->sadb_supported_len = PFKEY_UNIT64(elen);
|
|
sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
|
|
off += PFKEY_ALIGN8(sizeof(*sup));
|
|
|
|
for (i = 1; i <= SADB_EALG_MAX; i++) {
|
|
struct enc_xform *ealgo;
|
|
|
|
ealgo = esp_algorithm_lookup(i);
|
|
if (!ealgo)
|
|
continue;
|
|
alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
|
|
alg->sadb_alg_id = i;
|
|
alg->sadb_alg_ivlen = ealgo->blocksize;
|
|
alg->sadb_alg_minbits = _BITS(ealgo->minkey);
|
|
alg->sadb_alg_maxbits = _BITS(ealgo->maxkey);
|
|
off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
|
|
}
|
|
}
|
|
|
|
IPSEC_ASSERT(off == len,
|
|
("length assumption failed (off %u len %u)", off, len));
|
|
|
|
m_freem(m);
|
|
return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* free secreg entry registered.
|
|
* XXX: I want to do free a socket marked done SADB_RESIGER to socket.
|
|
*/
|
|
void
|
|
key_freereg(struct socket *so)
|
|
{
|
|
struct secreg *reg;
|
|
int i;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("NULL so"));
|
|
|
|
/*
|
|
* check whether existing or not.
|
|
* check all type of SA, because there is a potential that
|
|
* one socket is registered to multiple type of SA.
|
|
*/
|
|
REGTREE_LOCK();
|
|
for (i = 0; i <= SADB_SATYPE_MAX; i++) {
|
|
LIST_FOREACH(reg, &V_regtree[i], chain) {
|
|
if (reg->so == so && __LIST_CHAINED(reg)) {
|
|
LIST_REMOVE(reg, chain);
|
|
free(reg, M_IPSEC_SAR);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
REGTREE_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* SADB_EXPIRE processing
|
|
* send
|
|
* <base, SA, SA2, lifetime(C and one of HS), address(SD)>
|
|
* to KMD by PF_KEY.
|
|
* NOTE: We send only soft lifetime extension.
|
|
*
|
|
* OUT: 0 : succeed
|
|
* others : error number
|
|
*/
|
|
static int
|
|
key_expire(struct secasvar *sav, int hard)
|
|
{
|
|
int satype;
|
|
struct mbuf *result = NULL, *m;
|
|
int len;
|
|
int error = -1;
|
|
struct sadb_lifetime *lt;
|
|
|
|
IPSEC_ASSERT (sav != NULL, ("null sav"));
|
|
IPSEC_ASSERT (sav->sah != NULL, ("null sa header"));
|
|
|
|
/* set msg header */
|
|
satype = key_proto2satype(sav->sah->saidx.proto);
|
|
IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype));
|
|
m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
result = m;
|
|
|
|
/* create SA extension */
|
|
m = key_setsadbsa(sav);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* create SA extension */
|
|
m = key_setsadbxsa2(sav->sah->saidx.mode,
|
|
sav->replay ? sav->replay->count : 0,
|
|
sav->sah->saidx.reqid);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* create lifetime extension (current and soft) */
|
|
len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
bzero(mtod(m, caddr_t), len);
|
|
lt = mtod(m, struct sadb_lifetime *);
|
|
lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
|
|
lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
|
|
lt->sadb_lifetime_allocations = sav->lft_c->allocations;
|
|
lt->sadb_lifetime_bytes = sav->lft_c->bytes;
|
|
lt->sadb_lifetime_addtime = sav->lft_c->addtime;
|
|
lt->sadb_lifetime_usetime = sav->lft_c->usetime;
|
|
lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
|
|
lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
|
|
if (hard) {
|
|
lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
|
|
lt->sadb_lifetime_allocations = sav->lft_h->allocations;
|
|
lt->sadb_lifetime_bytes = sav->lft_h->bytes;
|
|
lt->sadb_lifetime_addtime = sav->lft_h->addtime;
|
|
lt->sadb_lifetime_usetime = sav->lft_h->usetime;
|
|
} else {
|
|
lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
|
|
lt->sadb_lifetime_allocations = sav->lft_s->allocations;
|
|
lt->sadb_lifetime_bytes = sav->lft_s->bytes;
|
|
lt->sadb_lifetime_addtime = sav->lft_s->addtime;
|
|
lt->sadb_lifetime_usetime = sav->lft_s->usetime;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* set sadb_address for source */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
|
|
&sav->sah->saidx.src.sa,
|
|
FULLMASK, IPSEC_ULPROTO_ANY);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/* set sadb_address for destination */
|
|
m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
|
|
&sav->sah->saidx.dst.sa,
|
|
FULLMASK, IPSEC_ULPROTO_ANY);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m_cat(result, m);
|
|
|
|
/*
|
|
* XXX-BZ Handle NAT-T extensions here.
|
|
*/
|
|
|
|
if ((result->m_flags & M_PKTHDR) == 0) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
if (result->m_len < sizeof(struct sadb_msg)) {
|
|
result = m_pullup(result, sizeof(struct sadb_msg));
|
|
if (result == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
result->m_pkthdr.len = 0;
|
|
for (m = result; m; m = m->m_next)
|
|
result->m_pkthdr.len += m->m_len;
|
|
|
|
mtod(result, struct sadb_msg *)->sadb_msg_len =
|
|
PFKEY_UNIT64(result->m_pkthdr.len);
|
|
|
|
return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
|
|
|
|
fail:
|
|
if (result)
|
|
m_freem(result);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* SADB_FLUSH processing
|
|
* receive
|
|
* <base>
|
|
* from the ikmpd, and free all entries in secastree.
|
|
* and send,
|
|
* <base>
|
|
* to the ikmpd.
|
|
* NOTE: to do is only marking SADB_SASTATE_DEAD.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_flush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
struct secashead *sah, *nextsah;
|
|
struct secasvar *sav, *nextsav;
|
|
u_int16_t proto;
|
|
u_int8_t state;
|
|
u_int stateidx;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* no SATYPE specified, i.e. flushing all SA. */
|
|
SAHTREE_LOCK();
|
|
for (sah = LIST_FIRST(&V_sahtree);
|
|
sah != NULL;
|
|
sah = nextsah) {
|
|
nextsah = LIST_NEXT(sah, chain);
|
|
|
|
if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
|
|
&& proto != sah->saidx.proto)
|
|
continue;
|
|
|
|
for (stateidx = 0;
|
|
stateidx < _ARRAYLEN(saorder_state_alive);
|
|
stateidx++) {
|
|
state = saorder_state_any[stateidx];
|
|
for (sav = LIST_FIRST(&sah->savtree[state]);
|
|
sav != NULL;
|
|
sav = nextsav) {
|
|
|
|
nextsav = LIST_NEXT(sav, chain);
|
|
|
|
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
|
|
KEY_FREESAV(&sav);
|
|
}
|
|
}
|
|
|
|
sah->state = SADB_SASTATE_DEAD;
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
|
|
if (m->m_len < sizeof(struct sadb_msg) ||
|
|
sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
|
|
ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
|
|
if (m->m_next)
|
|
m_freem(m->m_next);
|
|
m->m_next = NULL;
|
|
m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
|
|
newmsg = mtod(m, struct sadb_msg *);
|
|
newmsg->sadb_msg_errno = 0;
|
|
newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
|
|
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
|
|
}
|
|
|
|
/*
|
|
* SADB_DUMP processing
|
|
* dump all entries including status of DEAD in SAD.
|
|
* receive
|
|
* <base>
|
|
* from the ikmpd, and dump all secasvar leaves
|
|
* and send,
|
|
* <base> .....
|
|
* to the ikmpd.
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_dump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
struct secashead *sah;
|
|
struct secasvar *sav;
|
|
u_int16_t proto;
|
|
u_int stateidx;
|
|
u_int8_t satype;
|
|
u_int8_t state;
|
|
int cnt;
|
|
struct sadb_msg *newmsg;
|
|
struct mbuf *n;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
/* map satype to proto */
|
|
if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
|
|
__func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* count sav entries to be sent to the userland. */
|
|
cnt = 0;
|
|
SAHTREE_LOCK();
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
|
|
&& proto != sah->saidx.proto)
|
|
continue;
|
|
|
|
for (stateidx = 0;
|
|
stateidx < _ARRAYLEN(saorder_state_any);
|
|
stateidx++) {
|
|
state = saorder_state_any[stateidx];
|
|
LIST_FOREACH(sav, &sah->savtree[state], chain) {
|
|
cnt++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (cnt == 0) {
|
|
SAHTREE_UNLOCK();
|
|
return key_senderror(so, m, ENOENT);
|
|
}
|
|
|
|
/* send this to the userland, one at a time. */
|
|
newmsg = NULL;
|
|
LIST_FOREACH(sah, &V_sahtree, chain) {
|
|
if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
|
|
&& proto != sah->saidx.proto)
|
|
continue;
|
|
|
|
/* map proto to satype */
|
|
if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
|
|
SAHTREE_UNLOCK();
|
|
ipseclog((LOG_DEBUG, "%s: there was invalid proto in "
|
|
"SAD.\n", __func__));
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
for (stateidx = 0;
|
|
stateidx < _ARRAYLEN(saorder_state_any);
|
|
stateidx++) {
|
|
state = saorder_state_any[stateidx];
|
|
LIST_FOREACH(sav, &sah->savtree[state], chain) {
|
|
n = key_setdumpsa(sav, SADB_DUMP, satype,
|
|
--cnt, mhp->msg->sadb_msg_pid);
|
|
if (!n) {
|
|
SAHTREE_UNLOCK();
|
|
return key_senderror(so, m, ENOBUFS);
|
|
}
|
|
key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
|
|
}
|
|
}
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
|
|
m_freem(m);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* SADB_X_PROMISC processing
|
|
*
|
|
* m will always be freed.
|
|
*/
|
|
static int
|
|
key_promisc(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
|
|
{
|
|
int olen;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
|
|
|
|
olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
|
|
|
|
if (olen < sizeof(struct sadb_msg)) {
|
|
#if 1
|
|
return key_senderror(so, m, EINVAL);
|
|
#else
|
|
m_freem(m);
|
|
return 0;
|
|
#endif
|
|
} else if (olen == sizeof(struct sadb_msg)) {
|
|
/* enable/disable promisc mode */
|
|
struct keycb *kp;
|
|
|
|
if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
|
|
return key_senderror(so, m, EINVAL);
|
|
mhp->msg->sadb_msg_errno = 0;
|
|
switch (mhp->msg->sadb_msg_satype) {
|
|
case 0:
|
|
case 1:
|
|
kp->kp_promisc = mhp->msg->sadb_msg_satype;
|
|
break;
|
|
default:
|
|
return key_senderror(so, m, EINVAL);
|
|
}
|
|
|
|
/* send the original message back to everyone */
|
|
mhp->msg->sadb_msg_errno = 0;
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
|
|
} else {
|
|
/* send packet as is */
|
|
|
|
m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
|
|
|
|
/* TODO: if sadb_msg_seq is specified, send to specific pid */
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
|
|
}
|
|
}
|
|
|
|
static int (*key_typesw[])(struct socket *, struct mbuf *,
|
|
const struct sadb_msghdr *) = {
|
|
NULL, /* SADB_RESERVED */
|
|
key_getspi, /* SADB_GETSPI */
|
|
key_update, /* SADB_UPDATE */
|
|
key_add, /* SADB_ADD */
|
|
key_delete, /* SADB_DELETE */
|
|
key_get, /* SADB_GET */
|
|
key_acquire2, /* SADB_ACQUIRE */
|
|
key_register, /* SADB_REGISTER */
|
|
NULL, /* SADB_EXPIRE */
|
|
key_flush, /* SADB_FLUSH */
|
|
key_dump, /* SADB_DUMP */
|
|
key_promisc, /* SADB_X_PROMISC */
|
|
NULL, /* SADB_X_PCHANGE */
|
|
key_spdadd, /* SADB_X_SPDUPDATE */
|
|
key_spdadd, /* SADB_X_SPDADD */
|
|
key_spddelete, /* SADB_X_SPDDELETE */
|
|
key_spdget, /* SADB_X_SPDGET */
|
|
NULL, /* SADB_X_SPDACQUIRE */
|
|
key_spddump, /* SADB_X_SPDDUMP */
|
|
key_spdflush, /* SADB_X_SPDFLUSH */
|
|
key_spdadd, /* SADB_X_SPDSETIDX */
|
|
NULL, /* SADB_X_SPDEXPIRE */
|
|
key_spddelete2, /* SADB_X_SPDDELETE2 */
|
|
};
|
|
|
|
/*
|
|
* parse sadb_msg buffer to process PFKEYv2,
|
|
* and create a data to response if needed.
|
|
* I think to be dealed with mbuf directly.
|
|
* IN:
|
|
* msgp : pointer to pointer to a received buffer pulluped.
|
|
* This is rewrited to response.
|
|
* so : pointer to socket.
|
|
* OUT:
|
|
* length for buffer to send to user process.
|
|
*/
|
|
int
|
|
key_parse(struct mbuf *m, struct socket *so)
|
|
{
|
|
struct sadb_msg *msg;
|
|
struct sadb_msghdr mh;
|
|
u_int orglen;
|
|
int error;
|
|
int target;
|
|
|
|
IPSEC_ASSERT(so != NULL, ("null socket"));
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
|
|
#if 0 /*kdebug_sadb assumes msg in linear buffer*/
|
|
KEYDEBUG(KEYDEBUG_KEY_DUMP,
|
|
ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__));
|
|
kdebug_sadb(msg));
|
|
#endif
|
|
|
|
if (m->m_len < sizeof(struct sadb_msg)) {
|
|
m = m_pullup(m, sizeof(struct sadb_msg));
|
|
if (!m)
|
|
return ENOBUFS;
|
|
}
|
|
msg = mtod(m, struct sadb_msg *);
|
|
orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
|
|
target = KEY_SENDUP_ONE;
|
|
|
|
if ((m->m_flags & M_PKTHDR) == 0 ||
|
|
m->m_pkthdr.len != m->m_pkthdr.len) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__));
|
|
PFKEYSTAT_INC(out_invlen);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
if (msg->sadb_msg_version != PF_KEY_V2) {
|
|
ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n",
|
|
__func__, msg->sadb_msg_version));
|
|
PFKEYSTAT_INC(out_invver);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
if (msg->sadb_msg_type > SADB_MAX) {
|
|
ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
|
|
__func__, msg->sadb_msg_type));
|
|
PFKEYSTAT_INC(out_invmsgtype);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
/* for old-fashioned code - should be nuked */
|
|
if (m->m_pkthdr.len > MCLBYTES) {
|
|
m_freem(m);
|
|
return ENOBUFS;
|
|
}
|
|
if (m->m_next) {
|
|
struct mbuf *n;
|
|
|
|
MGETHDR(n, M_NOWAIT, MT_DATA);
|
|
if (n && m->m_pkthdr.len > MHLEN) {
|
|
if (!(MCLGET(n, M_NOWAIT))) {
|
|
m_free(n);
|
|
n = NULL;
|
|
}
|
|
}
|
|
if (!n) {
|
|
m_freem(m);
|
|
return ENOBUFS;
|
|
}
|
|
m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
|
|
n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
|
|
n->m_next = NULL;
|
|
m_freem(m);
|
|
m = n;
|
|
}
|
|
|
|
/* align the mbuf chain so that extensions are in contiguous region. */
|
|
error = key_align(m, &mh);
|
|
if (error)
|
|
return error;
|
|
|
|
msg = mh.msg;
|
|
|
|
/* check SA type */
|
|
switch (msg->sadb_msg_satype) {
|
|
case SADB_SATYPE_UNSPEC:
|
|
switch (msg->sadb_msg_type) {
|
|
case SADB_GETSPI:
|
|
case SADB_UPDATE:
|
|
case SADB_ADD:
|
|
case SADB_DELETE:
|
|
case SADB_GET:
|
|
case SADB_ACQUIRE:
|
|
case SADB_EXPIRE:
|
|
ipseclog((LOG_DEBUG, "%s: must specify satype "
|
|
"when msg type=%u.\n", __func__,
|
|
msg->sadb_msg_type));
|
|
PFKEYSTAT_INC(out_invsatype);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
break;
|
|
case SADB_SATYPE_AH:
|
|
case SADB_SATYPE_ESP:
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
switch (msg->sadb_msg_type) {
|
|
case SADB_X_SPDADD:
|
|
case SADB_X_SPDDELETE:
|
|
case SADB_X_SPDGET:
|
|
case SADB_X_SPDDUMP:
|
|
case SADB_X_SPDFLUSH:
|
|
case SADB_X_SPDSETIDX:
|
|
case SADB_X_SPDUPDATE:
|
|
case SADB_X_SPDDELETE2:
|
|
ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n",
|
|
__func__, msg->sadb_msg_type));
|
|
PFKEYSTAT_INC(out_invsatype);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
break;
|
|
case SADB_SATYPE_RSVP:
|
|
case SADB_SATYPE_OSPFV2:
|
|
case SADB_SATYPE_RIPV2:
|
|
case SADB_SATYPE_MIP:
|
|
ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n",
|
|
__func__, msg->sadb_msg_satype));
|
|
PFKEYSTAT_INC(out_invsatype);
|
|
error = EOPNOTSUPP;
|
|
goto senderror;
|
|
case 1: /* XXX: What does it do? */
|
|
if (msg->sadb_msg_type == SADB_X_PROMISC)
|
|
break;
|
|
/*FALLTHROUGH*/
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
|
|
__func__, msg->sadb_msg_satype));
|
|
PFKEYSTAT_INC(out_invsatype);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
/* check field of upper layer protocol and address family */
|
|
if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
|
|
&& mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
|
|
struct sadb_address *src0, *dst0;
|
|
u_int plen;
|
|
|
|
src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
|
|
dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
|
|
|
|
/* check upper layer protocol */
|
|
if (src0->sadb_address_proto != dst0->sadb_address_proto) {
|
|
ipseclog((LOG_DEBUG, "%s: upper layer protocol "
|
|
"mismatched.\n", __func__));
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
/* check family */
|
|
if (PFKEY_ADDR_SADDR(src0)->sa_family !=
|
|
PFKEY_ADDR_SADDR(dst0)->sa_family) {
|
|
ipseclog((LOG_DEBUG, "%s: address family mismatched.\n",
|
|
__func__));
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
if (PFKEY_ADDR_SADDR(src0)->sa_len !=
|
|
PFKEY_ADDR_SADDR(dst0)->sa_len) {
|
|
ipseclog((LOG_DEBUG, "%s: address struct size "
|
|
"mismatched.\n", __func__));
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
|
|
case AF_INET:
|
|
if (PFKEY_ADDR_SADDR(src0)->sa_len !=
|
|
sizeof(struct sockaddr_in)) {
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
break;
|
|
case AF_INET6:
|
|
if (PFKEY_ADDR_SADDR(src0)->sa_len !=
|
|
sizeof(struct sockaddr_in6)) {
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: unsupported address family\n",
|
|
__func__));
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EAFNOSUPPORT;
|
|
goto senderror;
|
|
}
|
|
|
|
switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
|
|
case AF_INET:
|
|
plen = sizeof(struct in_addr) << 3;
|
|
break;
|
|
case AF_INET6:
|
|
plen = sizeof(struct in6_addr) << 3;
|
|
break;
|
|
default:
|
|
plen = 0; /*fool gcc*/
|
|
break;
|
|
}
|
|
|
|
/* check max prefix length */
|
|
if (src0->sadb_address_prefixlen > plen ||
|
|
dst0->sadb_address_prefixlen > plen) {
|
|
ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n",
|
|
__func__));
|
|
PFKEYSTAT_INC(out_invaddr);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
/*
|
|
* prefixlen == 0 is valid because there can be a case when
|
|
* all addresses are matched.
|
|
*/
|
|
}
|
|
|
|
if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
|
|
key_typesw[msg->sadb_msg_type] == NULL) {
|
|
PFKEYSTAT_INC(out_invmsgtype);
|
|
error = EINVAL;
|
|
goto senderror;
|
|
}
|
|
|
|
return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
|
|
|
|
senderror:
|
|
msg->sadb_msg_errno = error;
|
|
return key_sendup_mbuf(so, m, target);
|
|
}
|
|
|
|
static int
|
|
key_senderror(struct socket *so, struct mbuf *m, int code)
|
|
{
|
|
struct sadb_msg *msg;
|
|
|
|
IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
|
|
("mbuf too small, len %u", m->m_len));
|
|
|
|
msg = mtod(m, struct sadb_msg *);
|
|
msg->sadb_msg_errno = code;
|
|
return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
|
|
}
|
|
|
|
/*
|
|
* set the pointer to each header into message buffer.
|
|
* m will be freed on error.
|
|
* XXX larger-than-MCLBYTES extension?
|
|
*/
|
|
static int
|
|
key_align(struct mbuf *m, struct sadb_msghdr *mhp)
|
|
{
|
|
struct mbuf *n;
|
|
struct sadb_ext *ext;
|
|
size_t off, end;
|
|
int extlen;
|
|
int toff;
|
|
|
|
IPSEC_ASSERT(m != NULL, ("null mbuf"));
|
|
IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
|
|
IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
|
|
("mbuf too small, len %u", m->m_len));
|
|
|
|
/* initialize */
|
|
bzero(mhp, sizeof(*mhp));
|
|
|
|
mhp->msg = mtod(m, struct sadb_msg *);
|
|
mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
|
|
|
|
end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
|
|
extlen = end; /*just in case extlen is not updated*/
|
|
for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
|
|
n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
|
|
if (!n) {
|
|
/* m is already freed */
|
|
return ENOBUFS;
|
|
}
|
|
ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
|
|
|
|
/* set pointer */
|
|
switch (ext->sadb_ext_type) {
|
|
case SADB_EXT_SA:
|
|
case SADB_EXT_ADDRESS_SRC:
|
|
case SADB_EXT_ADDRESS_DST:
|
|
case SADB_EXT_ADDRESS_PROXY:
|
|
case SADB_EXT_LIFETIME_CURRENT:
|
|
case SADB_EXT_LIFETIME_HARD:
|
|
case SADB_EXT_LIFETIME_SOFT:
|
|
case SADB_EXT_KEY_AUTH:
|
|
case SADB_EXT_KEY_ENCRYPT:
|
|
case SADB_EXT_IDENTITY_SRC:
|
|
case SADB_EXT_IDENTITY_DST:
|
|
case SADB_EXT_SENSITIVITY:
|
|
case SADB_EXT_PROPOSAL:
|
|
case SADB_EXT_SUPPORTED_AUTH:
|
|
case SADB_EXT_SUPPORTED_ENCRYPT:
|
|
case SADB_EXT_SPIRANGE:
|
|
case SADB_X_EXT_POLICY:
|
|
case SADB_X_EXT_SA2:
|
|
#ifdef IPSEC_NAT_T
|
|
case SADB_X_EXT_NAT_T_TYPE:
|
|
case SADB_X_EXT_NAT_T_SPORT:
|
|
case SADB_X_EXT_NAT_T_DPORT:
|
|
case SADB_X_EXT_NAT_T_OAI:
|
|
case SADB_X_EXT_NAT_T_OAR:
|
|
case SADB_X_EXT_NAT_T_FRAG:
|
|
#endif
|
|
/* duplicate check */
|
|
/*
|
|
* XXX Are there duplication payloads of either
|
|
* KEY_AUTH or KEY_ENCRYPT ?
|
|
*/
|
|
if (mhp->ext[ext->sadb_ext_type] != NULL) {
|
|
ipseclog((LOG_DEBUG, "%s: duplicate ext_type "
|
|
"%u\n", __func__, ext->sadb_ext_type));
|
|
m_freem(m);
|
|
PFKEYSTAT_INC(out_dupext);
|
|
return EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n",
|
|
__func__, ext->sadb_ext_type));
|
|
m_freem(m);
|
|
PFKEYSTAT_INC(out_invexttype);
|
|
return EINVAL;
|
|
}
|
|
|
|
extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
|
|
|
|
if (key_validate_ext(ext, extlen)) {
|
|
m_freem(m);
|
|
PFKEYSTAT_INC(out_invlen);
|
|
return EINVAL;
|
|
}
|
|
|
|
n = m_pulldown(m, off, extlen, &toff);
|
|
if (!n) {
|
|
/* m is already freed */
|
|
return ENOBUFS;
|
|
}
|
|
ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
|
|
|
|
mhp->ext[ext->sadb_ext_type] = ext;
|
|
mhp->extoff[ext->sadb_ext_type] = off;
|
|
mhp->extlen[ext->sadb_ext_type] = extlen;
|
|
}
|
|
|
|
if (off != end) {
|
|
m_freem(m);
|
|
PFKEYSTAT_INC(out_invlen);
|
|
return EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
key_validate_ext(const struct sadb_ext *ext, int len)
|
|
{
|
|
const struct sockaddr *sa;
|
|
enum { NONE, ADDR } checktype = NONE;
|
|
int baselen = 0;
|
|
const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
|
|
|
|
if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
|
|
return EINVAL;
|
|
|
|
/* if it does not match minimum/maximum length, bail */
|
|
if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
|
|
ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
|
|
return EINVAL;
|
|
if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
|
|
return EINVAL;
|
|
if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
|
|
return EINVAL;
|
|
|
|
/* more checks based on sadb_ext_type XXX need more */
|
|
switch (ext->sadb_ext_type) {
|
|
case SADB_EXT_ADDRESS_SRC:
|
|
case SADB_EXT_ADDRESS_DST:
|
|
case SADB_EXT_ADDRESS_PROXY:
|
|
baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
|
|
checktype = ADDR;
|
|
break;
|
|
case SADB_EXT_IDENTITY_SRC:
|
|
case SADB_EXT_IDENTITY_DST:
|
|
if (((const struct sadb_ident *)ext)->sadb_ident_type ==
|
|
SADB_X_IDENTTYPE_ADDR) {
|
|
baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
|
|
checktype = ADDR;
|
|
} else
|
|
checktype = NONE;
|
|
break;
|
|
default:
|
|
checktype = NONE;
|
|
break;
|
|
}
|
|
|
|
switch (checktype) {
|
|
case NONE:
|
|
break;
|
|
case ADDR:
|
|
sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen);
|
|
if (len < baselen + sal)
|
|
return EINVAL;
|
|
if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
|
|
return EINVAL;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
key_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < IPSEC_DIR_MAX; i++)
|
|
TAILQ_INIT(&V_sptree[i]);
|
|
|
|
LIST_INIT(&V_sahtree);
|
|
|
|
for (i = 0; i <= SADB_SATYPE_MAX; i++)
|
|
LIST_INIT(&V_regtree[i]);
|
|
|
|
LIST_INIT(&V_acqtree);
|
|
LIST_INIT(&V_spacqtree);
|
|
|
|
if (!IS_DEFAULT_VNET(curvnet))
|
|
return;
|
|
|
|
SPTREE_LOCK_INIT();
|
|
REGTREE_LOCK_INIT();
|
|
SAHTREE_LOCK_INIT();
|
|
ACQ_LOCK_INIT();
|
|
SPACQ_LOCK_INIT();
|
|
|
|
#ifndef IPSEC_DEBUG2
|
|
callout_init(&key_timer, 1);
|
|
callout_reset(&key_timer, hz, key_timehandler, NULL);
|
|
#endif /*IPSEC_DEBUG2*/
|
|
|
|
/* initialize key statistics */
|
|
keystat.getspi_count = 1;
|
|
|
|
printf("IPsec: Initialized Security Association Processing.\n");
|
|
}
|
|
|
|
#ifdef VIMAGE
|
|
void
|
|
key_destroy(void)
|
|
{
|
|
TAILQ_HEAD(, secpolicy) drainq;
|
|
struct secpolicy *sp, *nextsp;
|
|
struct secacq *acq, *nextacq;
|
|
struct secspacq *spacq, *nextspacq;
|
|
struct secashead *sah, *nextsah;
|
|
struct secreg *reg;
|
|
int i;
|
|
|
|
TAILQ_INIT(&drainq);
|
|
SPTREE_WLOCK();
|
|
for (i = 0; i < IPSEC_DIR_MAX; i++) {
|
|
TAILQ_CONCAT(&drainq, &V_sptree[i], chain);
|
|
}
|
|
SPTREE_WUNLOCK();
|
|
sp = TAILQ_FIRST(&drainq);
|
|
while (sp != NULL) {
|
|
nextsp = TAILQ_NEXT(sp, chain);
|
|
KEY_FREESP(&sp);
|
|
sp = nextsp;
|
|
}
|
|
|
|
SAHTREE_LOCK();
|
|
for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) {
|
|
nextsah = LIST_NEXT(sah, chain);
|
|
if (__LIST_CHAINED(sah)) {
|
|
LIST_REMOVE(sah, chain);
|
|
free(sah, M_IPSEC_SAH);
|
|
}
|
|
}
|
|
SAHTREE_UNLOCK();
|
|
|
|
REGTREE_LOCK();
|
|
for (i = 0; i <= SADB_SATYPE_MAX; i++) {
|
|
LIST_FOREACH(reg, &V_regtree[i], chain) {
|
|
if (__LIST_CHAINED(reg)) {
|
|
LIST_REMOVE(reg, chain);
|
|
free(reg, M_IPSEC_SAR);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
REGTREE_UNLOCK();
|
|
|
|
ACQ_LOCK();
|
|
for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) {
|
|
nextacq = LIST_NEXT(acq, chain);
|
|
if (__LIST_CHAINED(acq)) {
|
|
LIST_REMOVE(acq, chain);
|
|
free(acq, M_IPSEC_SAQ);
|
|
}
|
|
}
|
|
ACQ_UNLOCK();
|
|
|
|
SPACQ_LOCK();
|
|
for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL;
|
|
spacq = nextspacq) {
|
|
nextspacq = LIST_NEXT(spacq, chain);
|
|
if (__LIST_CHAINED(spacq)) {
|
|
LIST_REMOVE(spacq, chain);
|
|
free(spacq, M_IPSEC_SAQ);
|
|
}
|
|
}
|
|
SPACQ_UNLOCK();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* XXX: maybe This function is called after INBOUND IPsec processing.
|
|
*
|
|
* Special check for tunnel-mode packets.
|
|
* We must make some checks for consistency between inner and outer IP header.
|
|
*
|
|
* xxx more checks to be provided
|
|
*/
|
|
int
|
|
key_checktunnelsanity(struct secasvar *sav, u_int family, caddr_t src,
|
|
caddr_t dst)
|
|
{
|
|
IPSEC_ASSERT(sav->sah != NULL, ("null SA header"));
|
|
|
|
/* XXX: check inner IP header */
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* record data transfer on SA, and update timestamps */
|
|
void
|
|
key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
|
|
{
|
|
IPSEC_ASSERT(sav != NULL, ("Null secasvar"));
|
|
IPSEC_ASSERT(m != NULL, ("Null mbuf"));
|
|
if (!sav->lft_c)
|
|
return;
|
|
|
|
/*
|
|
* XXX Currently, there is a difference of bytes size
|
|
* between inbound and outbound processing.
|
|
*/
|
|
sav->lft_c->bytes += m->m_pkthdr.len;
|
|
/* to check bytes lifetime is done in key_timehandler(). */
|
|
|
|
/*
|
|
* We use the number of packets as the unit of
|
|
* allocations. We increment the variable
|
|
* whenever {esp,ah}_{in,out}put is called.
|
|
*/
|
|
sav->lft_c->allocations++;
|
|
/* XXX check for expires? */
|
|
|
|
/*
|
|
* NOTE: We record CURRENT usetime by using wall clock,
|
|
* in seconds. HARD and SOFT lifetime are measured by the time
|
|
* difference (again in seconds) from usetime.
|
|
*
|
|
* usetime
|
|
* v expire expire
|
|
* -----+-----+--------+---> t
|
|
* <--------------> HARD
|
|
* <-----> SOFT
|
|
*/
|
|
sav->lft_c->usetime = time_second;
|
|
/* XXX check for expires? */
|
|
|
|
return;
|
|
}
|
|
|
|
static void
|
|
key_sa_chgstate(struct secasvar *sav, u_int8_t state)
|
|
{
|
|
IPSEC_ASSERT(sav != NULL, ("NULL sav"));
|
|
SAHTREE_LOCK_ASSERT();
|
|
|
|
if (sav->state != state) {
|
|
if (__LIST_CHAINED(sav))
|
|
LIST_REMOVE(sav, chain);
|
|
sav->state = state;
|
|
LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Take one of the kernel's security keys and convert it into a PF_KEY
|
|
* structure within an mbuf, suitable for sending up to a waiting
|
|
* application in user land.
|
|
*
|
|
* IN:
|
|
* src: A pointer to a kernel security key.
|
|
* exttype: Which type of key this is. Refer to the PF_KEY data structures.
|
|
* OUT:
|
|
* a valid mbuf or NULL indicating an error
|
|
*
|
|
*/
|
|
|
|
static struct mbuf *
|
|
key_setkey(struct seckey *src, u_int16_t exttype)
|
|
{
|
|
struct mbuf *m;
|
|
struct sadb_key *p;
|
|
int len;
|
|
|
|
if (src == NULL)
|
|
return NULL;
|
|
|
|
len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src));
|
|
m = m_get2(len, M_NOWAIT, MT_DATA, 0);
|
|
if (m == NULL)
|
|
return NULL;
|
|
m_align(m, len);
|
|
m->m_len = len;
|
|
p = mtod(m, struct sadb_key *);
|
|
bzero(p, len);
|
|
p->sadb_key_len = PFKEY_UNIT64(len);
|
|
p->sadb_key_exttype = exttype;
|
|
p->sadb_key_bits = src->bits;
|
|
bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src));
|
|
|
|
return m;
|
|
}
|
|
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/*
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* Take one of the kernel's lifetime data structures and convert it
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* into a PF_KEY structure within an mbuf, suitable for sending up to
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* a waiting application in user land.
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*
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* IN:
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* src: A pointer to a kernel lifetime structure.
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* exttype: Which type of lifetime this is. Refer to the PF_KEY
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* data structures for more information.
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* OUT:
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* a valid mbuf or NULL indicating an error
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*
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*/
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static struct mbuf *
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key_setlifetime(struct seclifetime *src, u_int16_t exttype)
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{
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struct mbuf *m = NULL;
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struct sadb_lifetime *p;
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int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime));
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if (src == NULL)
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return NULL;
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m = m_get2(len, M_NOWAIT, MT_DATA, 0);
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if (m == NULL)
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return m;
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m_align(m, len);
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m->m_len = len;
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p = mtod(m, struct sadb_lifetime *);
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bzero(p, len);
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p->sadb_lifetime_len = PFKEY_UNIT64(len);
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p->sadb_lifetime_exttype = exttype;
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p->sadb_lifetime_allocations = src->allocations;
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p->sadb_lifetime_bytes = src->bytes;
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p->sadb_lifetime_addtime = src->addtime;
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p->sadb_lifetime_usetime = src->usetime;
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return m;
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}
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