ipsec.inc 11.6 KB
Newer Older
Ad Schellevis's avatar
Ad Schellevis committed
1
<?php
2

Ad Schellevis's avatar
Ad Schellevis committed
3 4 5 6
/*
	Copyright (C) 2007 Scott Ullrich
	Copyright (C) 2008 Shrew Soft Inc
	Copyright (C) 2003-2004 Manuel Kasper
7
	All rights reserved.
Ad Schellevis's avatar
Ad Schellevis committed
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR 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.
*/

/* IPsec defines */
$ipsec_loglevels = array("dmn" => "Daemon", "mgr" => "SA Manager", "ike" => "IKE SA", "chd" => "IKE Child SA",
	"job" => "Job Processing", "cfg" => "Configuration backend", "knl" => "Kernel Interface",
	"net" => "Networking", "asn" => "ASN encoding", "enc" => "Message encoding",
	"imc" => "Integrity checker", "imv" => "Integrity Verifier", "pts" => "Platform Trust Service",
	"tls" => "TLS handler", "esp" => "IPsec traffic", "lib" => "StrongSWAN Lib");

$p1_ealgos = array(
	'aes' => array( 'name' => 'AES', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
	'aes128gcm' => array( 'name' => 'AES128-GCM', 'keysel' => array( 'lo' => 64, 'hi' => 128, 'step' => 32 ) ),
	'aes192gcm' => array( 'name' => 'AES192-GCM', 'keysel' => array( 'lo' => 64, 'hi' => 128, 'step' => 32 ) ),
	'aes256gcm' => array( 'name' => 'AES256-GCM', 'keysel' => array( 'lo' => 64, 'hi' => 128, 'step' => 32 ) ),
	'blowfish' => array( 'name' => 'Blowfish', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
	'3des' => array( 'name' => '3DES' ),
	'cast128' => array( 'name' => 'CAST128' ),
	'des' => array( 'name' => 'DES' ));

$p2_ealgos = array(
	'aes' => array( 'name' => 'AES', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
	'aes128gcm' => array( 'name' => 'AES128-GCM', 'keysel' => array( 'lo' => 64, 'hi' => 128, 'step' => 32 ) ),
	'aes192gcm' => array( 'name' => 'AES192-GCM', 'keysel' => array( 'lo' => 64, 'hi' => 128, 'step' => 32 ) ),
	'aes256gcm' => array( 'name' => 'AES256-GCM', 'keysel' => array( 'lo' => 64, 'hi' => 128, 'step' => 32 ) ),
	'blowfish' => array( 'name' => 'Blowfish', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
	'3des' => array( 'name' => '3DES' ),
	'cast128' => array( 'name' => 'CAST128' ),
	'des' => array( 'name' => 'DES' ));

$p2_halgos = array(
	'hmac_md5' => 'MD5',
	'hmac_sha1' => 'SHA1',
	'hmac_sha256' => 'SHA256',
	'hmac_sha384' => 'SHA384',
	'hmac_sha512' => 'SHA512',
	'aesxcbc' => 'AES-XCBC'
);


$p2_protos = array(
	'esp' => 'ESP',
	'ah' => 'AH');

$p2_pfskeygroups = array(
	0 => 'off',
	1  => '1 (768 bit)',
	2  => '2 (1024 bit)',
	5  => '5 (1536 bit)',
	14 => '14 (2048 bit)',
	15 => '15 (3072 bit)',
	16 => '16 (4096 bit)',
	17 => '17 (6144 bit)',
	18 => '18 (8192 bit)'
);

/*
 * Return phase1 local address
 */
function ipsec_get_phase1_src(& $ph1ent) {
88
	if (!empty($ph1ent['interface'])) {
Ad Schellevis's avatar
Ad Schellevis committed
89
		if (!is_ipaddr($ph1ent['interface'])) {
90 91 92
			if (strpos($ph1ent['interface'],'_vip') !== false) {
				// if this is a vip, set the interface to $ph1ent['interface']
				$if = $ph1ent['interface'];
Ad Schellevis's avatar
Ad Schellevis committed
93
			} else {
94 95 96 97 98 99
				// not a vip, check failover interface
				if ($ph1ent['protocol'] == "inet6") {
						$if = get_failover_interface($ph1ent['interface'], "inet6");
				} else {
						$if = get_failover_interface($ph1ent['interface']);
				}
Ad Schellevis's avatar
Ad Schellevis committed
100 101
			}
		} else {
102 103
			// interface is an ip address, return
			return $ph1ent['interface'];
Ad Schellevis's avatar
Ad Schellevis committed
104 105 106 107
		}
	} else {
		$if = "wan";
	}
108 109 110 111 112
	if ($ph1ent['protocol'] == "inet6") {
		return get_interface_ipv6($if);
	} else {
		return get_interface_ip($if);
	}
Ad Schellevis's avatar
Ad Schellevis committed
113 114 115 116 117 118 119 120 121 122 123 124
}

/*
 * Return phase1 local address
 */
function ipsec_get_phase1_dst(& $ph1ent) {
	global $g;

	if (empty($ph1ent['remote-gateway']))
		return false;
	$rg = $ph1ent['remote-gateway'];
	if (!is_ipaddr($rg)) {
Ad Schellevis's avatar
Ad Schellevis committed
125
		if(! file_exists("/var/run/booting"))
Ad Schellevis's avatar
Ad Schellevis committed
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
			return resolve_retry($rg);
	}
	if(!is_ipaddr($rg))
		return false;

	return $rg;
}

/*
 * Return phase2 idinfo in cidr format
 */
function ipsec_idinfo_to_cidr(& $idinfo, $addrbits = false, $mode = "") {
	global $config;

	switch ($idinfo['type']) {
		case "address":
			if ($addrbits) {
				if ($mode == "tunnel6")
					return $idinfo['address']."/128";
				else
					return $idinfo['address']."/32";
			} else
				return $idinfo['address'];
			break; /* NOTREACHED */
		case "network":
			return "{$idinfo['address']}/{$idinfo['netbits']}";
			break; /* NOTREACHED */
		case "none":
		case "mobile":
			return "0.0.0.0/0";
			break; /* NOTREACHED */
		default:
			if (empty($mode) && !empty($idinfo['mode']))
				$mode = $idinfo['mode'];

			if ($mode == "tunnel6") {
				$address = get_interface_ipv6($idinfo['type']);
				$netbits = get_interface_subnetv6($idinfo['type']);
				$address = gen_subnetv6($address,$netbits);
				return "{$address}/{$netbits}";
			} else {
				$address = get_interface_ip($idinfo['type']);
				$netbits = get_interface_subnet($idinfo['type']);
				$address = gen_subnet($address,$netbits);
				return "{$address}/{$netbits}";
			}
			break; /* NOTREACHED */
	}
}


/*
 *  Return phase2 idinfo in text format
 */
function ipsec_idinfo_to_text(& $idinfo) {
	global $config;

	switch ($idinfo['type']) {
        case "address":
		return $idinfo['address'];
		break; /* NOTREACHED */
        case "network":
		return $idinfo['address']."/".$idinfo['netbits'];
		break; /* NOTREACHED */
	case "mobile":
		return gettext("Mobile Client");
		break; /* NOTREACHED */
	case "none":
		return gettext("None");
		break; /* NOTREACHED */
        default:
		if (!empty($config['interfaces'][$idinfo['type']]))
			return convert_friendly_interface_to_friendly_descr($idinfo['type']);
		else
			return strtoupper($idinfo['type']);
		break; /* NOTREACHED */
	}
}

/*
 * Return phase1 association for phase2
 */
208 209
function ipsec_lookup_phase1(&$ph2ent, &$ph1ent)
{
Ad Schellevis's avatar
Ad Schellevis committed
210 211
	global $config;

212
	if (!isset($config['ipsec']) || !is_array($config['ipsec'])) {
Ad Schellevis's avatar
Ad Schellevis committed
213
		return false;
214 215
	}
	if (!is_array($config['ipsec']['phase1'])) {
Ad Schellevis's avatar
Ad Schellevis committed
216
		return false;
217 218
	}
	if (empty($config['ipsec']['phase1'])) {
Ad Schellevis's avatar
Ad Schellevis committed
219
		return false;
220
	}
Ad Schellevis's avatar
Ad Schellevis committed
221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262

	foreach ($config['ipsec']['phase1'] as $ph1tmp) {
	    if ($ph1tmp['ikeid'] == $ph2ent['ikeid']) {
		$ph1ent = $ph1tmp;
		return $ph1ent;
	    }
	}

	return false;
}

/*
 * Check phase1 communications status
 */
function ipsec_phase1_status($ipsec_status, $ikeid) {

	foreach ($ipsec_status as $ike) {
		if ($ike['id'] != $ikeid)
			continue;
		if ($ike['status'] == 'established')
			return true;
		break;
	}

	return false;
}

/*
 * Return dump of SPD table
 */
function ipsec_dump_spd()
{
	$fd = @popen("/sbin/setkey -DP", "r");
	$spd = array();
	if ($fd) {
		while (!feof($fd)) {
			$line = chop(fgets($fd));
			if (!$line)
				continue;
			if ($line == "No SPD entries.")
				break;
			if ($line[0] != "\t") {
263
				if (isset($cursp))
Ad Schellevis's avatar
Ad Schellevis committed
264 265 266 267 268 269
					$spd[] = $cursp;
				$cursp = array();
				$linea = explode(" ", $line);
				$cursp['srcid'] = substr($linea[0], 0, strpos($linea[0], "["));
				$cursp['dstid'] = substr($linea[1], 0, strpos($linea[1], "["));
				$i = 0;
270
			} else if (isset($cursp)) {
Ad Schellevis's avatar
Ad Schellevis committed
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
				$linea = explode(" ", trim($line));
				switch($i)
				{
					case 1:
						if ($linea[1] == "none")	/* don't show default anti-lockout rule */
							unset($cursp);
						else
							$cursp['dir'] = $linea[0];
						break;
					case 2:
						$upperspec = explode("/", $linea[0]);
						$cursp['proto'] = $upperspec[0];
						list($cursp['src'], $cursp['dst']) = explode("-", $upperspec[2]);
						$cursp['reqid'] =  substr($upperspec[3], strpos($upperspec[3], "#")+1);
						break;
				}
			}
			$i++;
		}
290
		if (isset($cursp) && count($cursp))
Ad Schellevis's avatar
Ad Schellevis committed
291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354
			$spd[] = $cursp;
		pclose($fd);
	}

	return $spd;
}

/*
 * Return dump of SAD table
 */
function ipsec_dump_sad()
{
	$fd = @popen("/sbin/setkey -D", "r");
	$sad = array();
	if ($fd) {
		while (!feof($fd)) {
			$line = chop(fgets($fd));
			if (!$line || $line[0] == " ")
				continue;
			if ($line == "No SAD entries.")
				break;
			if ($line[0] != "\t")
			{
				if (is_array($cursa))
					$sad[] = $cursa;
				$cursa = array();
				list($cursa['src'],$cursa['dst']) = explode(" ", $line);
				$i = 0;
			}
			else
			{
				$linea = explode(" ", trim($line));
				switch ($i) {
					case 1:
						$cursa['proto'] = $linea[0];
						$cursa['spi'] = substr($linea[2], strpos($linea[2], "x")+1, -1);
						$reqid = substr($linea[3], strpos($linea[3], "=")+1);
						$cursa['reqid'] = substr($reqid, 0, strcspn($reqid,"("));
						break;
					case 2:
						$cursa['ealgo'] = $linea[1];
						break;
					case 3:
						$cursa['aalgo'] = $linea[1];
						break;
					case 8:
						$sadata = explode("(", $linea[1]);
						$cursa['data'] = $sadata[0] . " B";
						break;
				}
			}
			$i++;
		}
		if (is_array($cursa) && count($cursa))
			$sad[] = $cursa;
		pclose($fd);
	}

	return $sad;
}

/*
 * Return dump of mobile user list
 */
355 356
function ipsec_dump_mobile()
{
Ad Schellevis's avatar
Ad Schellevis committed
357 358
	global $g, $custom_listtags;

359 360 361
	$strongswan_leases_xml = '/tmp/strongswan_leases.xml';

	$_gb = exec(sprintf('/usr/local/sbin/ipsec stroke leases > %s', $strongswan_leases_xml));
Ad Schellevis's avatar
Ad Schellevis committed
362

363
	if (!file_exists($strongswan_leases_xml)) {
Ad Schellevis's avatar
Ad Schellevis committed
364 365 366 367 368
		log_error(gettext("IPsec daemon seems to have issues or not running! Could not display mobile user stats!"));
		return array();
	}

	$custom_listtags = array('lease', 'pool');
369 370
	$response = parse_xml_config($strongswan_leases_xml, 'leases');
	@unlink($strongswan_leases_xml);
Ad Schellevis's avatar
Ad Schellevis committed
371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387
	unset($custom_listtags, $_gb);

	return $response;
}

function ipsec_mobilekey_sort() {
	global $config;

	function mobilekeycmp($a, $b) {
		return strcmp($a['ident'][0], $b['ident'][0]);
	}

	usort($config['ipsec']['mobilekey'], "mobilekeycmp");
}

function ipsec_get_number_of_phase2($ikeid) {
	global $config;
388
	$a_phase2 = $config['ipsec']['phase2'];
Ad Schellevis's avatar
Ad Schellevis committed
389 390 391

	$nbph2=0;

392 393 394
	if (is_array($a_phase2) && count($a_phase2)) {
		foreach ($a_phase2 as $ph2tmp) {
			if ($ph2tmp['ikeid'] == $ikeid) {
Ad Schellevis's avatar
Ad Schellevis committed
395 396 397 398 399 400 401 402 403 404
				$nbph2++;
			}
		}
	}

	return $nbph2;
}


function ipsec_find_id(& $ph1ent, $side = "local", $rgmap = array()) {
405
	$id_data = null;
Ad Schellevis's avatar
Ad Schellevis committed
406 407
	if ($side == "local") {
		$id_type = $ph1ent['myid_type'];
408 409 410
		if (isset($ph1ent['myid_data'])) {
			$id_data = $ph1ent['myid_data'];
		}
Ad Schellevis's avatar
Ad Schellevis committed
411 412 413 414

		$addr = ipsec_get_phase1_src($ph1ent);
		if (!$addr)
			return array();
415
	} elseif ($side == "peer") {
Ad Schellevis's avatar
Ad Schellevis committed
416
		$id_type = $ph1ent['peerid_type'];
417 418 419
		if (isset($ph1ent['peerid_data'])) {
			$id_data = $ph1ent['peerid_data'];
		}
Ad Schellevis's avatar
Ad Schellevis committed
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464

		if (isset($ph1ent['mobile']))
			$addr = "%any";
		else
			$addr = $ph1ent['remote-gateway'];
	} else {
		return array();
	}


	$thisid_type = $id_type;
	switch ($thisid_type) {
	case "myaddress":
		$thisid_type = "address";
		$thisid_data = $addr;
		break;

	case "dyn_dns":
		$thisid_type = "address";
		$thisid_data = resolve_retry($id_data);
		break;

	case "peeraddress":
		$thisid_type = "address";
		$thisid_data = $rgmap[$ph1ent['remote-gateway']];
		break;

	case "address";
		$thisid_data = $id_data;
		break;

	case "fqdn";
	case "keyid tag";
	case "user_fqdn";
	case "asn1dn";
		$thisid_data = $id_data;
		if( $thisid_data )
			$thisid_data = "{$thisid_data}";
		break;
	}
	return array($thisid_type, $thisid_data);
}


?>