[apple/ipsec.git] / ipsec-tools / racoon / vpn.c

/*
 * Copyright (c) 2007 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/signal.h>
#include <sys/stat.h>
#include <sys/un.h>

#include <net/pfkeyv2.h>

#include <netinet/in.h>
#ifndef HAVE_NETINET6_IPSEC
#include <netinet/ipsec.h>
#else 
#include <netinet6/ipsec.h>
#endif


#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef ENABLE_HYBRID
#include <resolv.h>
#endif

#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "sockmisc.h"
#include "debug.h"
#include "handler.h"
#include "schedule.h"
#include "localconf.h"
#include "remoteconf.h"
#include "grabmyaddr.h"
#include "isakmp_var.h"
#include "isakmp.h"
#include "oakley.h"
#include "pfkey.h"
#include "ipsec_doi.h"
#include "isakmp_inf.h"
#ifdef ENABLE_HYBRID
#include "isakmp_cfg.h"
#include "isakmp_unity.h"
#endif
#include "session.h"
#include "gcmalloc.h"
#include "sainfo.h"
#include "ipsec_doi.h"
#include "nattraversal.h"
#include "fsm.h"

#include "vpn_control.h"
#include "vpn_control_var.h"
#include "strnames.h"
#include "ike_session.h"
#include "ipsecMessageTracer.h"


static int vpn_get_ph2pfs (phase1_handle_t *);

int
vpn_connect(struct bound_addr *srv, int oper)
{
	int error = -1;
	struct sockaddr_storage *dst;
	struct remoteconf *rmconf;
	struct sockaddr_storage *remote = NULL;
	struct sockaddr_storage *local = NULL;
	u_int16_t port;

	dst = racoon_calloc(1, sizeof(struct sockaddr_storage));	// this should come from the bound_addr parameter
	if (dst == NULL)
		goto out;
	((struct sockaddr_in *)(dst))->sin_len = sizeof(struct sockaddr_in);
	((struct sockaddr_in *)(dst))->sin_family = AF_INET;
	((struct sockaddr_in *)(dst))->sin_port = 500;
	((struct sockaddr_in *)(dst))->sin_addr.s_addr = srv->address;

	/* find appropreate configuration */
	rmconf = getrmconf(dst);
	if (rmconf == NULL) {
		plog(ASL_LEVEL_ERR, 
			"no configuration found "
			"for %s\n", saddrwop2str((struct sockaddr *)dst));
		goto out1;
	}
	
	/*
	 * Find the source address
	 */
	if (rmconf->forced_local != NULL) {
		if ((local = dupsaddr(rmconf->forced_local)) == NULL) {
			plog(ASL_LEVEL_ERR, "failed to duplicate local address\n");
			goto out1;
		}
	} else if ((local = getlocaladdr((struct sockaddr *)dst)) == NULL) {
		plog(ASL_LEVEL_ERR, "cannot get local address\n");
		goto out1;
	}
	
	/* get remote IP address and port number. */
	if ((remote = dupsaddr(dst)) == NULL) {
		plog(ASL_LEVEL_ERR, 
			"failed to duplicate address\n");
		goto out1;
	}

	switch (remote->ss_family) {
	case AF_INET:
		((struct sockaddr_in *)remote)->sin_port =
			((struct sockaddr_in *)rmconf->remote)->sin_port;
		break;
#ifdef INET6
	case AF_INET6:
		((struct sockaddr_in6 *)remote)->sin6_port =
			((struct sockaddr_in6 *)rmconf->remote)->sin6_port;
		break;
#endif
	default:
		plog(ASL_LEVEL_ERR, 
			"invalid family: %d\n",
			remote->ss_family);
		goto out1;
		break;
	}

	port = ntohs(getmyaddrsport(local));
	if (set_port(local, port) == NULL) 
		goto out1;

	plog(ASL_LEVEL_INFO, 
		"accept a request to establish IKE-SA: "
		"%s\n", saddrwop2str((struct sockaddr *)remote));

	IPSECLOGASLMSG("IPSec connecting to server %s\n",
				   saddrwop2str((struct sockaddr *)remote));
	if (ikev1_ph1begin_i(NULL, rmconf, remote, local, oper) < 0)
		goto out1;
	error = 0;

out1:
	if (dst != NULL)
		racoon_free(dst);
	if (local != NULL)
		racoon_free(local);
	if (remote != NULL)
		racoon_free(remote);
out:

	return error;
}

int
vpn_disconnect(struct bound_addr *srv, const char *reason)
{
	union {									// Wcast-align fix - force alignment
        struct sockaddr_storage	ss;
        struct sockaddr_in  saddr;
    } u;

	bzero(&u.saddr, sizeof(u.saddr));
	u.saddr.sin_len = sizeof(u.saddr);
	u.saddr.sin_addr.s_addr = srv->address;
	u.saddr.sin_port = 0;
	u.saddr.sin_family = AF_INET;

	IPSECLOGASLMSG("IPSec disconnecting from server %s\n",
				   saddrwop2str((struct sockaddr *)&u.ss));	

	ike_sessions_stopped_by_controller(&u.ss,
                                       0,
                                       reason);
	if (ike_session_purgephXbydstaddrwop(&u.ss) > 0) {
		return 0;
	} else {
		return -1;
	}
}

int
vpn_start_ph2(struct bound_addr *addr, struct vpnctl_cmd_start_ph2 *pkt)
{
	struct vpnctl_sa_selector *selector_ptr;
	struct vpnctl_algo *algo_ptr, *next_algo;
	int					i, j, defklen;
	struct sainfoalg	*new_algo;
	struct sainfo		*new_sainfo = NULL, *check;
	u_int16_t			class, algorithm, keylen;
	phase1_handle_t	*ph1;
	struct sockaddr_in	saddr;
	
	struct id {
		u_int8_t type;		/* ID Type */
		u_int8_t proto_id;	/* Protocol ID */
		u_int16_t port;		/* Port */
		u_int32_t addr;		/* IPv4 address */
		u_int32_t mask;
	} *id_ptr;
	
	/* verify ph1 exists */	
	bzero(&saddr, sizeof(saddr));
	saddr.sin_len = sizeof(saddr);
	saddr.sin_addr.s_addr = addr->address;
	saddr.sin_port = 0;
	saddr.sin_family = AF_INET;
	ph1 = ike_session_getph1bydstaddrwop(NULL, (struct sockaddr_storage *)(&saddr));
	if (ph1 == NULL) {
		plog(ASL_LEVEL_ERR,
			"Cannot start Phase 2 - no Phase 1 found.\n");
		return -1;
	}
	if (!FSM_STATE_IS_ESTABLISHED(ph1->status)) {
		plog(ASL_LEVEL_ERR,
			 "Cannot start Phase 2 - Phase 1 not established.\n");
		return -1;
	}

	selector_ptr = (struct vpnctl_sa_selector *)(pkt + 1);
	algo_ptr = (struct vpnctl_algo *)(selector_ptr + ntohs(pkt->selector_count));

	for (i = 0; i < ntohs(pkt->selector_count); i++, selector_ptr++) {
		new_sainfo = create_sainfo();
		if (new_sainfo == NULL) {
			plog(ASL_LEVEL_ERR, 
				"Unable to allocate sainfo struct.\n");
			goto fail;
		}
		
		if (ntohl(selector_ptr->src_tunnel_mask) == 0xFFFFFFFF)
			new_sainfo->idsrc = vmalloc(sizeof(struct id) - sizeof(u_int32_t));
		else
			new_sainfo->idsrc = vmalloc(sizeof(struct id));
		if (new_sainfo->idsrc == NULL) {
			plog(ASL_LEVEL_ERR, 
				 "Unable to allocate id struct.\n");
			goto fail;
		}
		if (selector_ptr->dst_tunnel_mask == 0xFFFFFFFF)
			new_sainfo->iddst = vmalloc(sizeof(struct id) - sizeof(u_int32_t));
		else
			new_sainfo->iddst = vmalloc(sizeof(struct id));
		if (new_sainfo->iddst == NULL) {
			plog(ASL_LEVEL_ERR, 
				 "Unable to allocate id struct.\n");
			goto fail;
		}			
		
		id_ptr = ALIGNED_CAST(struct id *)new_sainfo->idsrc->v;
		if (ntohl(selector_ptr->src_tunnel_mask) == 0xFFFFFFFF)
			id_ptr->type = IPSECDOI_ID_IPV4_ADDR;
		else {
			id_ptr->type = IPSECDOI_ID_IPV4_ADDR_SUBNET;
			id_ptr->mask = selector_ptr->src_tunnel_mask;
		}
		id_ptr->addr = selector_ptr->src_tunnel_address;
		id_ptr->port = selector_ptr->src_tunnel_port;
		id_ptr->proto_id = selector_ptr->ul_protocol;
				
		id_ptr = ALIGNED_CAST(struct id *)new_sainfo->iddst->v;
		if (selector_ptr->dst_tunnel_mask == 0xFFFFFFFF)
			id_ptr->type = IPSECDOI_ID_IPV4_ADDR;
		else {
			id_ptr->type = IPSECDOI_ID_IPV4_ADDR_SUBNET;
			id_ptr->mask = selector_ptr->dst_tunnel_mask;
		}
		id_ptr->addr = selector_ptr->dst_tunnel_address;
		id_ptr->port = selector_ptr->dst_tunnel_port;
		id_ptr->proto_id = selector_ptr->ul_protocol;		
				
		new_sainfo->dynamic = addr->address;
		new_sainfo->lifetime = ntohl(pkt->lifetime);
		
		if (ntohs(pkt->pfs_group) != 0) {
			new_sainfo->pfs_group = algtype2doi(algclass_isakmp_dh, ntohs(pkt->pfs_group));
			if (new_sainfo->pfs_group == -1) {
				plog(ASL_LEVEL_ERR, "Invalid dh group specified\n");
				goto fail;
			}
		}
		for (j = 0, next_algo = algo_ptr; j < ntohs(pkt->algo_count); j++, next_algo++) {

			new_algo = newsainfoalg();
			if (new_algo == NULL) {
				plog(ASL_LEVEL_ERR, 
					"Failed to allocate algorithm structure\n");
				goto fail;
			}

			class = ntohs(next_algo->algo_class);
			algorithm = ntohs(next_algo->algo);
			keylen = ntohs(next_algo->key_len);
			
			new_algo->alg = algtype2doi(class, algorithm);
			if (new_algo->alg == -1) {
				plog(ASL_LEVEL_ERR, "Algorithm mismatched\n");
				racoon_free(new_algo);
				goto fail;
			}

			defklen = default_keylen(class, algorithm);
			if (defklen == 0) {
				if (keylen) {
					plog(ASL_LEVEL_ERR, "keylen not allowed\n");
					racoon_free(new_algo);
					goto fail;
				}
			} else {
				if (keylen && check_keylen(class, algorithm, keylen) < 0) {
					plog(ASL_LEVEL_ERR, "invalid keylen %d\n", keylen);
					racoon_free(new_algo);
					goto fail;
				}
			}

			if (keylen)
				new_algo->encklen = keylen;
			else
				new_algo->encklen = defklen;

			/* check if it's supported algorithm by kernel */
			if (!(class == algclass_ipsec_auth && algorithm == algtype_non_auth)
			 && pk_checkalg(class, algorithm, new_algo->encklen)) {
				int a = algclass2doi(class);
				int b = new_algo->alg;
				if (a == IPSECDOI_ATTR_AUTH)
					a = IPSECDOI_PROTO_IPSEC_AH;
				plog(ASL_LEVEL_ERR, 
					"Algorithm %s not supported by the kernel (missing module?)\n", s_ipsecdoi_trns(a, b));
				racoon_free(new_algo);
				goto fail;
			}
			inssainfoalg(&new_sainfo->algs[class], new_algo);
		}

		if (new_sainfo->algs[algclass_ipsec_enc] == 0) {
			plog(ASL_LEVEL_ERR, 
				"No encryption algorithm at %s\n", sainfo2str(new_sainfo));
			goto fail;
		}
		if (new_sainfo->algs[algclass_ipsec_auth] == 0) {
			plog(ASL_LEVEL_ERR, 
				"No authentication algorithm at %s\n", sainfo2str(new_sainfo));
			goto fail;
		}
		if (new_sainfo->algs[algclass_ipsec_comp] == 0) {
			plog(ASL_LEVEL_ERR, 
				"No compression algorithm at %s\n", sainfo2str(new_sainfo));
			goto fail;
		}

		/* duplicate check */
		check = getsainfo(new_sainfo->idsrc, new_sainfo->iddst, new_sainfo->id_i, 0);
		if (check && (!check->idsrc && !new_sainfo->idsrc)) {
			plog(ASL_LEVEL_ERR, "Duplicated sainfo: %s\n", sainfo2str(new_sainfo));
			goto fail;
		}
		//plog(ASL_LEVEL_DEBUG, "create sainfo: %s\n", sainfo2str(new_sainfo));
		inssainfo(new_sainfo);
		new_sainfo = NULL;
	}
	
	return 0;
	
fail:
	if (new_sainfo)
		release_sainfo(new_sainfo);
	flushsainfo_dynamic((u_int32_t)addr->address);
	return -1;
}

static int 
vpn_get_ph2pfs(phase1_handle_t *ph1)
{
}


int
vpn_get_config(phase1_handle_t *iph1, struct vpnctl_status_phase_change **msg, size_t *msg_size)
{

	struct vpnctl_modecfg_params *params;
	struct myaddrs *myaddr;
	u_int16_t ifname_len, msize;
	u_int8_t  *cptr;
	
	*msg = NULL;
	msize = 0;
	
	if (((struct sockaddr_in *)iph1->local)->sin_family != AF_INET) {
		plog(ASL_LEVEL_ERR, 
			"IPv6 not supported for mode config.\n");
		return -1;
	}
	
	if (iph1->mode_cfg->attr_list == NULL)
		return 1;	/* haven't received configuration yet */
		
	myaddr = find_myaddr((struct sockaddr *)iph1->local, 0);
	if (myaddr == NULL) {
		plog(ASL_LEVEL_ERR, 
			"Unable to find address structure.\n");
		return -1;
	}
	
	msize = sizeof(struct vpnctl_status_phase_change) 
			+ sizeof(struct vpnctl_modecfg_params);
	msize += iph1->mode_cfg->attr_list->l;

	*msg = racoon_calloc(1, msize);
	if (*msg == NULL) {
		plog(ASL_LEVEL_ERR, 
			"Failed to allocate space for message.\n");
		return -1;
	}
	
	(*msg)->hdr.flags = htons(VPNCTL_FLAG_MODECFG_USED);
	params = (struct vpnctl_modecfg_params *)(*msg + 1);
	params->outer_local_addr = ((struct sockaddr_in *)iph1->local)->sin_addr.s_addr;
	params->outer_remote_port = htons(0);
	params->outer_local_port = htons(0);
	ifname_len = strlen(myaddr->ifname);
	memset(&params->ifname, 0, IFNAMSIZ);
	memcpy(&params->ifname, myaddr->ifname, ifname_len < IFNAMSIZ ? ifname_len : IFNAMSIZ-1);
	cptr = (u_int8_t *)(params + 1);
	memcpy(cptr, iph1->mode_cfg->attr_list->v, iph1->mode_cfg->attr_list->l);
	*msg_size = msize;

	IPSECLOGASLMSG("IPSec Network Configuration established.\n");

	return 0;
}

int
vpn_xauth_reply(u_int32_t address, void *attr_list, size_t attr_len)
{

	struct isakmp_pl_attr *reply;
	void* attr_ptr;
	vchar_t *payload = NULL;
	phase1_handle_t	*iph1;
	struct sockaddr_in	saddr;
	int error = -1;
	int tlen = attr_len;
	struct isakmp_data *attr;
	char *dataptr = (char *)attr_list;

	/* find ph1 */	
	bzero(&saddr, sizeof(saddr));
	saddr.sin_len = sizeof(saddr);
	saddr.sin_addr.s_addr = address;
	saddr.sin_port = 0;
	saddr.sin_family = AF_INET;
	iph1 = ike_session_getph1bydstaddrwop(NULL, (struct sockaddr_storage *)(&saddr));
	if (iph1 == NULL) {
		plog(ASL_LEVEL_ERR, 
			"Cannot reply to xauth request - no ph1 found.\n");
		goto end;
	}

	if (iph1->xauth_awaiting_userinput == 0) {
		plog(ASL_LEVEL_ERR, "Received xauth reply data with no xauth reply pending \n");
		goto end;
	}
	
	/* validate attr lengths */
	while (tlen > 0)
	{
		int tlv;
		
		attr = (struct isakmp_data *)dataptr;
		tlv = (attr->type & htons(0x8000)) == 0;
		
		if (tlv) {
			tlen -= ntohs(attr->lorv);
			dataptr += ntohs(attr->lorv);
		}
		tlen -= sizeof(u_int32_t);
		dataptr += sizeof(u_int32_t);
	}
	if (tlen != 0) {
		plog(ASL_LEVEL_ERR, "Invalid auth info received from VPN Control socket.\n");
		goto end;
	}
	
	payload = vmalloc(sizeof(struct isakmp_pl_attr) + attr_len);
	if (payload == NULL) {	
		plog(ASL_LEVEL_ERR, "Cannot allocate memory for xauth reply\n");
		goto end;
	}
	memset(payload->v, 0, sizeof(reply));

	reply = (struct isakmp_pl_attr *)payload->v;
	reply->h.len = htons(payload->l);
	reply->type = ISAKMP_CFG_REPLY;
	reply->id = iph1->pended_xauth_id;	/* network byte order */
	iph1->xauth_awaiting_userinput = 0;	/* no longer waiting */
	attr_ptr = reply + 1;
	memcpy(attr_ptr, attr_list, attr_len);

	plog(ASL_LEVEL_DEBUG, 
		    "Sending MODE_CFG REPLY\n");
	error = isakmp_cfg_send(iph1, payload, 
	    ISAKMP_NPTYPE_ATTR, ISAKMP_FLAG_E, 0, 0, iph1->xauth_awaiting_userinput_msg);
	VPTRINIT(iph1->xauth_awaiting_userinput_msg);
	ike_session_stop_xauth_timer(iph1);

	IPSECLOGASLMSG("IPSec Extended Authentication sent.\n");

end:
	if (payload)
		vfree(payload);
	return error;
}

int
vpn_assert(struct sockaddr_storage *src_addr, struct sockaddr_storage *dst_addr)
{
	if (ike_session_assert(src_addr, dst_addr)) {
		plog(ASL_LEVEL_ERR, 
			 "Cannot assert - no matching session.\n");
		return -1;
	}

	return 0;
}
Commit	Line	Data
d1e348cf A	1	/*
	2	* Copyright (c) 2007 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22
	23	/*
	24	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	25	* All rights reserved.
	26	*
	27	* Redistribution and use in source and binary forms, with or without
	28	* modification, are permitted provided that the following conditions
	29	* are met:
	30	* 1. Redistributions of source code must retain the above copyright
	31	* notice, this list of conditions and the following disclaimer.
	32	* 2. Redistributions in binary form must reproduce the above copyright
	33	* notice, this list of conditions and the following disclaimer in the
	34	* documentation and/or other materials provided with the distribution.
	35	* 3. Neither the name of the project nor the names of its contributors
	36	* may be used to endorse or promote products derived from this software
	37	* without specific prior written permission.
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	40	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	42	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	43	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	44	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	45	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	46	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	47	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	48	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	49	* SUCH DAMAGE.
	50	*/
	51
	52	#include "config.h"
	53
	54	#include <sys/types.h>
	55	#include <sys/param.h>
	56	#include <sys/socket.h>
	57	#include <sys/signal.h>
	58	#include <sys/stat.h>
	59	#include <sys/un.h>
	60
65c25746	61	#include <net/pfkeyv2.h>
d1e348cf A	62
	63	#include <netinet/in.h>
	64	#ifndef HAVE_NETINET6_IPSEC
	65	#include <netinet/ipsec.h>
	66	#else
	67	#include <netinet6/ipsec.h>
	68	#endif
	69
	70
	71	#include <stdlib.h>
	72	#include <stdio.h>
	73	#include <string.h>
	74	#include <errno.h>
	75	#include <netdb.h>
	76	#ifdef HAVE_UNISTD_H
	77	#include <unistd.h>
	78	#endif
	79	#ifdef ENABLE_HYBRID
	80	#include <resolv.h>
	81	#endif
	82
	83	#include "var.h"
	84	#include "misc.h"
	85	#include "vmbuf.h"
	86	#include "plog.h"
	87	#include "sockmisc.h"
	88	#include "debug.h"
	89	#include "handler.h"
	90	#include "schedule.h"
	91	#include "localconf.h"
	92	#include "remoteconf.h"
	93	#include "grabmyaddr.h"
	94	#include "isakmp_var.h"
	95	#include "isakmp.h"
	96	#include "oakley.h"
d1e348cf A	97	#include "pfkey.h"
d1e348cf A	98	#include "ipsec_doi.h"
d1e348cf A	99	#include "isakmp_inf.h"
	100	#ifdef ENABLE_HYBRID
	101	#include "isakmp_cfg.h"
	102	#include "isakmp_unity.h"
	103	#endif
	104	#include "session.h"
	105	#include "gcmalloc.h"
	106	#include "sainfo.h"
	107	#include "ipsec_doi.h"
	108	#include "nattraversal.h"
65c25746	109	#include "fsm.h"
d1e348cf A	110
	111	#include "vpn_control.h"
	112	#include "vpn_control_var.h"
	113	#include "strnames.h"
	114	#include "ike_session.h"
e8d9021d	115	#include "ipsecMessageTracer.h"
d1e348cf A	116
d1e348cf A	117
65c25746	118	static int vpn_get_ph2pfs (phase1_handle_t *);
d1e348cf A	119
d1e348cf A	120	int
e8d9021d	121	vpn_connect(struct bound_addr *srv, int oper)
d1e348cf A	122	{
d1e348cf A	123	int error = -1;
85f41bec	124	struct sockaddr_storage *dst;
d1e348cf	125	struct remoteconf *rmconf;
85f41bec A	126	struct sockaddr_storage *remote = NULL;
85f41bec A	127	struct sockaddr_storage *local = NULL;
d1e348cf A	128	u_int16_t port;
d1e348cf A	129
85f41bec	130	dst = racoon_calloc(1, sizeof(struct sockaddr_storage)); // this should come from the bound_addr parameter
d1e348cf A	131	if (dst == NULL)
	132	goto out;
	133	((struct sockaddr_in *)(dst))->sin_len = sizeof(struct sockaddr_in);
	134	((struct sockaddr_in *)(dst))->sin_family = AF_INET;
	135	((struct sockaddr_in *)(dst))->sin_port = 500;
	136	((struct sockaddr_in *)(dst))->sin_addr.s_addr = srv->address;
	137
d1e348cf A	138	/* find appropreate configuration */
	139	rmconf = getrmconf(dst);
	140	if (rmconf == NULL) {
65c25746	141	plog(ASL_LEVEL_ERR,
d1e348cf	142	"no configuration found "
85f41bec	143	"for %s\n", saddrwop2str((struct sockaddr *)dst));
d1e348cf A	144	goto out1;
d1e348cf A	145	}
d9c572c0 A	146
	147	/*
	148	* Find the source address
	149	*/
	150	if (rmconf->forced_local != NULL) {
	151	if ((local = dupsaddr(rmconf->forced_local)) == NULL) {
	152	plog(ASL_LEVEL_ERR, "failed to duplicate local address\n");
	153	goto out1;
	154	}
	155	} else if ((local = getlocaladdr((struct sockaddr *)dst)) == NULL) {
	156	plog(ASL_LEVEL_ERR, "cannot get local address\n");
	157	goto out1;
	158	}
	159
d1e348cf	160	/* get remote IP address and port number. */
65c25746 A	161	if ((remote = dupsaddr(dst)) == NULL) {
65c25746 A	162	plog(ASL_LEVEL_ERR,
d1e348cf A	163	"failed to duplicate address\n");
	164	goto out1;
	165	}
	166
85f41bec	167	switch (remote->ss_family) {
d1e348cf A	168	case AF_INET:
	169	((struct sockaddr_in *)remote)->sin_port =
	170	((struct sockaddr_in *)rmconf->remote)->sin_port;
	171	break;
	172	#ifdef INET6
	173	case AF_INET6:
	174	((struct sockaddr_in6 *)remote)->sin6_port =
	175	((struct sockaddr_in6 *)rmconf->remote)->sin6_port;
	176	break;
	177	#endif
	178	default:
65c25746	179	plog(ASL_LEVEL_ERR,
d1e348cf	180	"invalid family: %d\n",
85f41bec	181	remote->ss_family);
d1e348cf A	182	goto out1;
	183	break;
	184	}
	185
	186	port = ntohs(getmyaddrsport(local));
	187	if (set_port(local, port) == NULL)
	188	goto out1;
	189
65c25746	190	plog(ASL_LEVEL_INFO,
d1e348cf	191	"accept a request to establish IKE-SA: "
85f41bec	192	"%s\n", saddrwop2str((struct sockaddr *)remote));
d1e348cf	193
e8d9021d	194	IPSECLOGASLMSG("IPSec connecting to server %s\n",
85f41bec	195	saddrwop2str((struct sockaddr *)remote));
d9c572c0 A	196	if (ikev1_ph1begin_i(NULL, rmconf, remote, local, oper) < 0)
d9c572c0 A	197	goto out1;
d1e348cf A	198	error = 0;
	199
	200	out1:
	201	if (dst != NULL)
	202	racoon_free(dst);
	203	if (local != NULL)
	204	racoon_free(local);
	205	if (remote != NULL)
	206	racoon_free(remote);
	207	out:
	208
	209	return error;
	210	}
	211
	212	int
85f41bec	213	vpn_disconnect(struct bound_addr srv, const char reason)
d1e348cf	214	{
85f41bec A	215	union { // Wcast-align fix - force alignment
	216	struct sockaddr_storage ss;
	217	struct sockaddr_in saddr;
	218	} u;
d1e348cf	219
85f41bec A	220	bzero(&u.saddr, sizeof(u.saddr));
	221	u.saddr.sin_len = sizeof(u.saddr);
	222	u.saddr.sin_addr.s_addr = srv->address;
	223	u.saddr.sin_port = 0;
	224	u.saddr.sin_family = AF_INET;
e8d9021d A	225
e8d9021d A	226	IPSECLOGASLMSG("IPSec disconnecting from server %s\n",
85f41bec	227	saddrwop2str((struct sockaddr *)&u.ss));
e8d9021d	228
85f41bec	229	ike_sessions_stopped_by_controller(&u.ss,
d1e348cf	230	0,
85f41bec	231	reason);
65c25746	232	if (ike_session_purgephXbydstaddrwop(&u.ss) > 0) {
d1e348cf A	233	return 0;
	234	} else {
	235	return -1;
	236	}
	237	}
	238
	239	int
	240	vpn_start_ph2(struct bound_addr addr, struct vpnctl_cmd_start_ph2 pkt)
	241	{
	242	struct vpnctl_sa_selector *selector_ptr;
	243	struct vpnctl_algo algo_ptr, next_algo;
	244	int i, j, defklen;
	245	struct sainfoalg *new_algo;
	246	struct sainfo new_sainfo = NULL, check;
	247	u_int16_t class, algorithm, keylen;
65c25746	248	phase1_handle_t *ph1;
d1e348cf A	249	struct sockaddr_in saddr;
	250
	251	struct id {
	252	u_int8_t type; /* ID Type */
	253	u_int8_t proto_id; /* Protocol ID */
	254	u_int16_t port; /* Port */
	255	u_int32_t addr; /* IPv4 address */
	256	u_int32_t mask;
	257	} *id_ptr;
	258
	259	/* verify ph1 exists */
	260	bzero(&saddr, sizeof(saddr));
	261	saddr.sin_len = sizeof(saddr);
	262	saddr.sin_addr.s_addr = addr->address;
	263	saddr.sin_port = 0;
	264	saddr.sin_family = AF_INET;
65c25746	265	ph1 = ike_session_getph1bydstaddrwop(NULL, (struct sockaddr_storage *)(&saddr));
d1e348cf	266	if (ph1 == NULL) {
65c25746 A	267	plog(ASL_LEVEL_ERR,
65c25746 A	268	"Cannot start Phase 2 - no Phase 1 found.\n");
d1e348cf A	269	return -1;
d1e348cf A	270	}
65c25746 A	271	if (!FSM_STATE_IS_ESTABLISHED(ph1->status)) {
	272	plog(ASL_LEVEL_ERR,
	273	"Cannot start Phase 2 - Phase 1 not established.\n");
d1e348cf A	274	return -1;
	275	}
	276
	277	selector_ptr = (struct vpnctl_sa_selector *)(pkt + 1);
	278	algo_ptr = (struct vpnctl_algo *)(selector_ptr + ntohs(pkt->selector_count));
	279
	280	for (i = 0; i < ntohs(pkt->selector_count); i++, selector_ptr++) {
65c25746	281	new_sainfo = create_sainfo();
d1e348cf	282	if (new_sainfo == NULL) {
65c25746 A	283	plog(ASL_LEVEL_ERR,
65c25746 A	284	"Unable to allocate sainfo struct.\n");
d1e348cf A	285	goto fail;
	286	}
	287
	288	if (ntohl(selector_ptr->src_tunnel_mask) == 0xFFFFFFFF)
	289	new_sainfo->idsrc = vmalloc(sizeof(struct id) - sizeof(u_int32_t));
	290	else
	291	new_sainfo->idsrc = vmalloc(sizeof(struct id));
	292	if (new_sainfo->idsrc == NULL) {
65c25746 A	293	plog(ASL_LEVEL_ERR,
65c25746 A	294	"Unable to allocate id struct.\n");
d1e348cf A	295	goto fail;
	296	}
	297	if (selector_ptr->dst_tunnel_mask == 0xFFFFFFFF)
	298	new_sainfo->iddst = vmalloc(sizeof(struct id) - sizeof(u_int32_t));
	299	else
	300	new_sainfo->iddst = vmalloc(sizeof(struct id));
	301	if (new_sainfo->iddst == NULL) {
65c25746 A	302	plog(ASL_LEVEL_ERR,
65c25746 A	303	"Unable to allocate id struct.\n");
d1e348cf A	304	goto fail;
	305	}
	306
85f41bec	307	id_ptr = ALIGNED_CAST(struct id *)new_sainfo->idsrc->v;
d1e348cf A	308	if (ntohl(selector_ptr->src_tunnel_mask) == 0xFFFFFFFF)
	309	id_ptr->type = IPSECDOI_ID_IPV4_ADDR;
	310	else {
	311	id_ptr->type = IPSECDOI_ID_IPV4_ADDR_SUBNET;
	312	id_ptr->mask = selector_ptr->src_tunnel_mask;
	313	}
	314	id_ptr->addr = selector_ptr->src_tunnel_address;
	315	id_ptr->port = selector_ptr->src_tunnel_port;
	316	id_ptr->proto_id = selector_ptr->ul_protocol;
	317
85f41bec	318	id_ptr = ALIGNED_CAST(struct id *)new_sainfo->iddst->v;
d1e348cf A	319	if (selector_ptr->dst_tunnel_mask == 0xFFFFFFFF)
	320	id_ptr->type = IPSECDOI_ID_IPV4_ADDR;
	321	else {
	322	id_ptr->type = IPSECDOI_ID_IPV4_ADDR_SUBNET;
	323	id_ptr->mask = selector_ptr->dst_tunnel_mask;
	324	}
	325	id_ptr->addr = selector_ptr->dst_tunnel_address;
	326	id_ptr->port = selector_ptr->dst_tunnel_port;
	327	id_ptr->proto_id = selector_ptr->ul_protocol;
	328
	329	new_sainfo->dynamic = addr->address;
	330	new_sainfo->lifetime = ntohl(pkt->lifetime);
	331
	332	if (ntohs(pkt->pfs_group) != 0) {
	333	new_sainfo->pfs_group = algtype2doi(algclass_isakmp_dh, ntohs(pkt->pfs_group));
	334	if (new_sainfo->pfs_group == -1) {
65c25746	335	plog(ASL_LEVEL_ERR, "Invalid dh group specified\n");
d1e348cf A	336	goto fail;
	337	}
	338	}
	339	for (j = 0, next_algo = algo_ptr; j < ntohs(pkt->algo_count); j++, next_algo++) {
	340
	341	new_algo = newsainfoalg();
	342	if (new_algo == NULL) {
65c25746 A	343	plog(ASL_LEVEL_ERR,
65c25746 A	344	"Failed to allocate algorithm structure\n");
d1e348cf A	345	goto fail;
	346	}
	347
	348	class = ntohs(next_algo->algo_class);
	349	algorithm = ntohs(next_algo->algo);
	350	keylen = ntohs(next_algo->key_len);
	351
	352	new_algo->alg = algtype2doi(class, algorithm);
	353	if (new_algo->alg == -1) {
65c25746	354	plog(ASL_LEVEL_ERR, "Algorithm mismatched\n");
d1e348cf A	355	racoon_free(new_algo);
	356	goto fail;
	357	}
	358
	359	defklen = default_keylen(class, algorithm);
	360	if (defklen == 0) {
	361	if (keylen) {
65c25746	362	plog(ASL_LEVEL_ERR, "keylen not allowed\n");
d1e348cf A	363	racoon_free(new_algo);
	364	goto fail;
	365	}
	366	} else {
	367	if (keylen && check_keylen(class, algorithm, keylen) < 0) {
65c25746	368	plog(ASL_LEVEL_ERR, "invalid keylen %d\n", keylen);
d1e348cf A	369	racoon_free(new_algo);
	370	goto fail;
	371	}
	372	}
	373
	374	if (keylen)
	375	new_algo->encklen = keylen;
	376	else
	377	new_algo->encklen = defklen;
	378
	379	/* check if it's supported algorithm by kernel */
	380	if (!(class == algclass_ipsec_auth && algorithm == algtype_non_auth)
	381	&& pk_checkalg(class, algorithm, new_algo->encklen)) {
	382	int a = algclass2doi(class);
	383	int b = new_algo->alg;
	384	if (a == IPSECDOI_ATTR_AUTH)
	385	a = IPSECDOI_PROTO_IPSEC_AH;
65c25746 A	386	plog(ASL_LEVEL_ERR,
65c25746 A	387	"Algorithm %s not supported by the kernel (missing module?)\n", s_ipsecdoi_trns(a, b));
d1e348cf A	388	racoon_free(new_algo);
	389	goto fail;
	390	}
	391	inssainfoalg(&new_sainfo->algs[class], new_algo);
	392	}
	393
	394	if (new_sainfo->algs[algclass_ipsec_enc] == 0) {
65c25746 A	395	plog(ASL_LEVEL_ERR,
65c25746 A	396	"No encryption algorithm at %s\n", sainfo2str(new_sainfo));
d1e348cf A	397	goto fail;
	398	}
	399	if (new_sainfo->algs[algclass_ipsec_auth] == 0) {
65c25746 A	400	plog(ASL_LEVEL_ERR,
65c25746 A	401	"No authentication algorithm at %s\n", sainfo2str(new_sainfo));
d1e348cf A	402	goto fail;
	403	}
	404	if (new_sainfo->algs[algclass_ipsec_comp] == 0) {
65c25746 A	405	plog(ASL_LEVEL_ERR,
65c25746 A	406	"No compression algorithm at %s\n", sainfo2str(new_sainfo));
d1e348cf A	407	goto fail;
	408	}
	409
	410	/* duplicate check */
	411	check = getsainfo(new_sainfo->idsrc, new_sainfo->iddst, new_sainfo->id_i, 0);
	412	if (check && (!check->idsrc && !new_sainfo->idsrc)) {
65c25746	413	plog(ASL_LEVEL_ERR, "Duplicated sainfo: %s\n", sainfo2str(new_sainfo));
d1e348cf A	414	goto fail;
d1e348cf A	415	}
65c25746	416	//plog(ASL_LEVEL_DEBUG, "create sainfo: %s\n", sainfo2str(new_sainfo));
d1e348cf A	417	inssainfo(new_sainfo);
	418	new_sainfo = NULL;
	419	}
	420
	421	return 0;
	422
	423	fail:
	424	if (new_sainfo)
65c25746	425	release_sainfo(new_sainfo);
85f41bec	426	flushsainfo_dynamic((u_int32_t)addr->address);
d1e348cf A	427	return -1;
	428	}
	429
	430	static int
65c25746	431	vpn_get_ph2pfs(phase1_handle_t *ph1)
d1e348cf A	432	{
	433	}
	434
	435
	436	int
65c25746	437	vpn_get_config(phase1_handle_t iph1, struct vpnctl_status_phase_change msg, size_t msg_size)
d1e348cf A	438	{
	439
	440	struct vpnctl_modecfg_params *params;
	441	struct myaddrs *myaddr;
	442	u_int16_t ifname_len, msize;
	443	u_int8_t *cptr;
	444
	445	*msg = NULL;
	446	msize = 0;
	447
	448	if (((struct sockaddr_in *)iph1->local)->sin_family != AF_INET) {
65c25746	449	plog(ASL_LEVEL_ERR,
d1e348cf A	450	"IPv6 not supported for mode config.\n");
	451	return -1;
	452	}
	453
	454	if (iph1->mode_cfg->attr_list == NULL)
	455	return 1; /* haven't received configuration yet */
	456
85f41bec	457	myaddr = find_myaddr((struct sockaddr *)iph1->local, 0);
d1e348cf	458	if (myaddr == NULL) {
65c25746 A	459	plog(ASL_LEVEL_ERR,
65c25746 A	460	"Unable to find address structure.\n");
d1e348cf A	461	return -1;
	462	}
	463
	464	msize = sizeof(struct vpnctl_status_phase_change)
	465	+ sizeof(struct vpnctl_modecfg_params);
	466	msize += iph1->mode_cfg->attr_list->l;
	467
	468	*msg = racoon_calloc(1, msize);
	469	if (*msg == NULL) {
65c25746 A	470	plog(ASL_LEVEL_ERR,
65c25746 A	471	"Failed to allocate space for message.\n");
d1e348cf A	472	return -1;
	473	}
	474
	475	(*msg)->hdr.flags = htons(VPNCTL_FLAG_MODECFG_USED);
	476	params = (struct vpnctl_modecfg_params )(msg + 1);
	477	params->outer_local_addr = ((struct sockaddr_in *)iph1->local)->sin_addr.s_addr;
	478	params->outer_remote_port = htons(0);
	479	params->outer_local_port = htons(0);
	480	ifname_len = strlen(myaddr->ifname);
	481	memset(&params->ifname, 0, IFNAMSIZ);
	482	memcpy(&params->ifname, myaddr->ifname, ifname_len < IFNAMSIZ ? ifname_len : IFNAMSIZ-1);
	483	cptr = (u_int8_t *)(params + 1);
	484	memcpy(cptr, iph1->mode_cfg->attr_list->v, iph1->mode_cfg->attr_list->l);
	485	*msg_size = msize;
	486
e8d9021d A	487	IPSECLOGASLMSG("IPSec Network Configuration established.\n");
e8d9021d A	488
d1e348cf A	489	return 0;
	490	}
	491
d1e348cf A	492	int
	493	vpn_xauth_reply(u_int32_t address, void *attr_list, size_t attr_len)
	494	{
	495
	496	struct isakmp_pl_attr *reply;
	497	void* attr_ptr;
	498	vchar_t *payload = NULL;
65c25746	499	phase1_handle_t *iph1;
d1e348cf A	500	struct sockaddr_in saddr;
	501	int error = -1;
	502	int tlen = attr_len;
	503	struct isakmp_data *attr;
	504	char dataptr = (char )attr_list;
	505
	506	/* find ph1 */
	507	bzero(&saddr, sizeof(saddr));
	508	saddr.sin_len = sizeof(saddr);
	509	saddr.sin_addr.s_addr = address;
	510	saddr.sin_port = 0;
	511	saddr.sin_family = AF_INET;
65c25746	512	iph1 = ike_session_getph1bydstaddrwop(NULL, (struct sockaddr_storage *)(&saddr));
d1e348cf	513	if (iph1 == NULL) {
65c25746 A	514	plog(ASL_LEVEL_ERR,
65c25746 A	515	"Cannot reply to xauth request - no ph1 found.\n");
d1e348cf A	516	goto end;
	517	}
	518
	519	if (iph1->xauth_awaiting_userinput == 0) {
65c25746	520	plog(ASL_LEVEL_ERR, "Received xauth reply data with no xauth reply pending \n");
d1e348cf A	521	goto end;
	522	}
	523
	524	/* validate attr lengths */
	525	while (tlen > 0)
	526	{
	527	int tlv;
	528
	529	attr = (struct isakmp_data *)dataptr;
	530	tlv = (attr->type & htons(0x8000)) == 0;
	531
	532	if (tlv) {
	533	tlen -= ntohs(attr->lorv);
	534	dataptr += ntohs(attr->lorv);
	535	}
	536	tlen -= sizeof(u_int32_t);
	537	dataptr += sizeof(u_int32_t);
	538	}
	539	if (tlen != 0) {
65c25746	540	plog(ASL_LEVEL_ERR, "Invalid auth info received from VPN Control socket.\n");
d1e348cf A	541	goto end;
	542	}
	543
	544	payload = vmalloc(sizeof(struct isakmp_pl_attr) + attr_len);
	545	if (payload == NULL) {
65c25746	546	plog(ASL_LEVEL_ERR, "Cannot allocate memory for xauth reply\n");
d1e348cf A	547	goto end;
	548	}
	549	memset(payload->v, 0, sizeof(reply));
	550
	551	reply = (struct isakmp_pl_attr *)payload->v;
	552	reply->h.len = htons(payload->l);
	553	reply->type = ISAKMP_CFG_REPLY;
	554	reply->id = iph1->pended_xauth_id; /* network byte order */
	555	iph1->xauth_awaiting_userinput = 0; /* no longer waiting */
	556	attr_ptr = reply + 1;
	557	memcpy(attr_ptr, attr_list, attr_len);
	558
65c25746	559	plog(ASL_LEVEL_DEBUG,
d1e348cf A	560	"Sending MODE_CFG REPLY\n");
	561	error = isakmp_cfg_send(iph1, payload,
	562	ISAKMP_NPTYPE_ATTR, ISAKMP_FLAG_E, 0, 0, iph1->xauth_awaiting_userinput_msg);
	563	VPTRINIT(iph1->xauth_awaiting_userinput_msg);
	564	ike_session_stop_xauth_timer(iph1);
	565
e8d9021d A	566	IPSECLOGASLMSG("IPSec Extended Authentication sent.\n");
e8d9021d A	567
d1e348cf A	568	end:
	569	if (payload)
	570	vfree(payload);
	571	return error;
	572	}
	573
e8d9021d	574	int
85f41bec	575	vpn_assert(struct sockaddr_storage src_addr, struct sockaddr_storage dst_addr)
e8d9021d A	576	{
e8d9021d A	577	if (ike_session_assert(src_addr, dst_addr)) {
65c25746 A	578	plog(ASL_LEVEL_ERR,
65c25746 A	579	"Cannot assert - no matching session.\n");
e8d9021d A	580	return -1;
	581	}
	582
	583	return 0;
	584	}
65c25746	585