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a93e56c5
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Matthew Grooms
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<?php
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/*
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ipsec.inc
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Copyright (C) 2007 Scott Ullrich
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Copyright (C) 2008 Shrew Soft Inc
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All rights reserved.
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Parts of this code was originally based on vpn_ipsec_sad.php
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Copyright (C) 2003-2004 Manuel Kasper
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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 are met:
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1. Redistributions of source code must retain the above copyright notice,
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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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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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523855b0
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Scott Ullrich
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pfSense_BUILDER_BINARIES: /usr/local/sbin/setkey
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pfSense_MODULE: ipsec
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a93e56c5
|
Matthew Grooms
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*/
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3462a529
|
Matthew Grooms
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/* IPsec defines */
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$my_identifier_list = array(
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'myaddress' => array( 'desc' => 'My IP address', 'mobile' => true ),
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'address' => array( 'desc' => 'IP address', 'mobile' => true ),
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'fqdn' => array( 'desc' => 'Distinguished name', 'mobile' => true ),
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'user_fqdn' => array( 'desc' => 'User distinguished name', 'mobile' => true ),
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'asn1dn' => array( 'desc' => 'ASN.1 distinguished Name', 'mobile' => true ),
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'keyid tag' => array( 'desc' => 'KeyID tag', 'mobile' => true ),
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'dyn_dns' => array( 'desc' => 'Dynamic DNS', 'mobile' => true ));
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$peer_identifier_list = array(
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'peeraddress' => array( 'desc' => 'Peer IP address', 'mobile' => false ),
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'address' => array( 'desc' => 'IP address', 'mobile' => false ),
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'fqdn' => array( 'desc' => 'Distinguished name', 'mobile' => true ),
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'user_fqdn' => array( 'desc' => 'User distinguished name', 'mobile' => true ),
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'asn1dn' => array( 'desc' => 'ASN.1 distinguished Name', 'mobile' => true ),
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'keyid tag' => array( 'desc' =>'KeyID tag', 'mobile' => true ));
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$p1_ealgos = array(
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'aes' => array( 'name' => 'AES', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
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'blowfish' => array( 'name' => 'Blowfish', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 8 ) ),
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'3des' => array( 'name' => '3DES' ),
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'cast128' => array( 'name' => 'CAST128' ),
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'des' => array( 'name' => 'DES' ));
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$p2_ealgos = array(
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'aes' => array( 'name' => 'AES', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
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'blowfish' => array( 'name' => 'Blowfish', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 8 ) ),
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'3des' => array( 'name' => '3DES' ),
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'cast128' => array( 'name' => 'CAST128' ),
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'des' => array( 'name' => 'DES' ));
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$p1_halgos = array(
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'sha1' => 'SHA1',
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'md5' => 'MD5');
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$p2_halgos = array(
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'hmac_sha1' => 'SHA1',
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'hmac_md5' => 'MD5');
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$p1_authentication_methods = array(
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'hybrid_rsa_server' => array( 'name' => 'Hybrid RSA + Xauth', 'mobile' => true ),
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1703e5c5
|
sullrich
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'xauth_rsa_server' => array( 'name' => 'Mutual RSA + Xauth', 'mobile' => true ),
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'xauth_psk_server' => array( 'name' => 'Mutual PSK + Xauth', 'mobile' => true ),
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3462a529
|
Matthew Grooms
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'rsasig' => array( 'name' => 'Mutual RSA', 'mobile' => false ),
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'pre_shared_key' => array( 'name' => 'Mutual PSK', 'mobile' => false ) );
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4b96b367
|
mgrooms
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$p2_modes = array(
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'tunnel' => 'Tunnel',
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'transport' => 'Transport');
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3462a529
|
Matthew Grooms
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$p2_protos = array(
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'esp' => 'ESP',
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'ah' => 'AH');
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$p2_pfskeygroups = array(
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'0' => 'off',
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'1' => '1',
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'2' => '2',
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'5' => '5');
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d799787e
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Matthew Grooms
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/*
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* ikeid management functions
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*/
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function ipsec_ikeid_used($ikeid) {
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global $config;
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foreach ($config['ipsec']['phase1'] as $ph1ent)
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if( $ikeid == $ph1ent['ikeid'] )
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return true;
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return false;
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}
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function ipsec_ikeid_next() {
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$ikeid = 1;
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while(ipsec_ikeid_used($ikeid))
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$ikeid++;
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return $ikeid;
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}
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a93e56c5
|
Matthew Grooms
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/*
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* Return phase1 local address
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*/
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function ipsec_get_phase1_src(& $ph1ent) {
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if ($ph1ent['interface'])
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$if = $ph1ent['interface'];
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else
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| 129 |
924876a8
|
Ermal Lu?i
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$if = "wan";
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a93e56c5
|
Matthew Grooms
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afb2de1b
|
Ermal Lu?i
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$interfaceip = get_interface_ip($if);
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a93e56c5
|
Matthew Grooms
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return $interfaceip;
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}
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3462a529
|
Matthew Grooms
|
/*
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* Return phase1 local address
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*/
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function ipsec_get_phase1_dst(& $ph1ent) {
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$rg = $ph1ent['remote-gateway'];
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if (!is_ipaddr($rg))
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return resolve_retry($rg);
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0af7398a
|
Matthew Grooms
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if(!is_ipaddr($rg))
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return false;
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3462a529
|
Matthew Grooms
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return $rg;
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}
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a93e56c5
|
Matthew Grooms
|
/*
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* Return phase2 idinfo in cidr format
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*/
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function ipsec_idinfo_to_cidr(& $idinfo,$addrbits = false) {
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global $config;
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switch ($idinfo['type'])
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{
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case "address":
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if ($addrbits)
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return $idinfo['address']."/32";
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else
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return $idinfo['address'];
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case "network":
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return $idinfo['address']."/".$idinfo['netbits'];
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3462a529
|
Matthew Grooms
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case "mobile":
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return "0.0.0.0/0";
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a55e9c70
|
Ermal Lu?i
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default:
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$address = get_interface_ip($idinfo['type']);
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$netbits = get_interface_subnet($idinfo['type']);
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a93e56c5
|
Matthew Grooms
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$address = gen_subnet($address,$netbits);
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return $address."/".$netbits;
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}
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}
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/*
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* Return phase2 idinfo in address/netmask format
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*/
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function ipsec_idinfo_to_subnet(& $idinfo,$addrbits = false) {
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global $config;
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switch ($idinfo['type'])
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{
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case "address":
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if ($addrbits)
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return $idinfo['address']."/255.255.255.255";
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else
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return $idinfo['address'];
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case "network":
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return $idinfo['address']."/".gen_subnet_mask($idinfo['netbits']);
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3462a529
|
Matthew Grooms
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case "mobile":
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return "0.0.0.0/0";
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a93e56c5
|
Matthew Grooms
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default:
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a55e9c70
|
Ermal Lu?i
|
$address = get_interface_ip($idinfo['type']);
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$netbits = get_interface_subnet($idinfo['type']);
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| 196 |
a93e56c5
|
Matthew Grooms
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$address = gen_subnet($address,$netbits);
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$netbits = gen_subnet_mask($netbits);
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return $address."/".netbits;
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}
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}
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/*
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* Return phase2 idinfo in text format
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*/
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function ipsec_idinfo_to_text(& $idinfo) {
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switch ($idinfo['type'])
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{
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case "address":
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return $idinfo['address'];
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case "network":
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return $idinfo['address']."/".$idinfo['netbits'];
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| 213 |
3462a529
|
Matthew Grooms
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case "mobile":
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return "Mobile Client";
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| 215 |
a93e56c5
|
Matthew Grooms
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default:
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return strtoupper($idinfo['type']);
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}
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}
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/*
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* Return phase1 association for phase2
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*/
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function ipsec_lookup_phase1(& $ph2ent,& $ph1ent)
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{
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global $config;
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$a_phase1 = $config['ipsec']['phase1'];
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if (is_array($a_phase1) && count($a_phase1)) {
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foreach ($a_phase1 as $ph1tmp) {
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if ($ph1tmp['ikeid'] == $ph2ent['ikeid']) {
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$ph1ent = $ph1tmp;
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return $ph1ent;
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| 233 |
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}
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| 234 |
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}
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| 235 |
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}
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| 236 |
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| 237 |
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return false;
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| 238 |
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}
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| 239 |
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| 240 |
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/*
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| 241 |
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* Check phase1 communications status
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| 242 |
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*/
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| 243 |
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function ipsec_phase1_status(& $ph1ent) {
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| 244 |
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| 245 |
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$loc_ip = get_ipsec_tunnel_src($ph1ent);
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| 246 |
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$rmt_ip = $ph1ent['remote-gateway'];
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| 247 |
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| 248 |
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if(ipsec_lookup_ipsakmp_sa($loc_ip,$rmt_ip))
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| 249 |
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return true;
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| 250 |
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| 251 |
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return false;
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| 252 |
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}
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| 253 |
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| 254 |
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/*
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| 255 |
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* Check phase2 communications status
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| 256 |
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*/
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| 257 |
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function ipsec_phase2_status(& $spd,& $sad,& $ph1ent,& $ph2ent) {
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| 258 |
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| 259 |
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$loc_ip = ipsec_get_phase1_src($ph1ent);
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| 260 |
30bc15cf
|
Bill Marquette
|
$rmt_ip = gethostbyname(ipsec_get_phase1_dst($ph1ent));
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| 261 |
a93e56c5
|
Matthew Grooms
|
|
| 262 |
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$loc_id = ipsec_idinfo_to_cidr($ph2ent['localid'],true);
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| 263 |
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$rmt_id = ipsec_idinfo_to_cidr($ph2ent['remoteid'],true);
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| 264 |
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| 265 |
|
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/* check for established SA in both directions */
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| 266 |
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if( ipsec_lookup_ipsec_sa($spd,$sad,"out",$loc_ip,$rmt_ip,$loc_id,$rmt_id) &&
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| 267 |
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ipsec_lookup_ipsec_sa($spd,$sad,"in",$rmt_ip,$loc_ip,$rmt_id,$loc_id))
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| 268 |
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return true;
|
| 269 |
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|
| 270 |
|
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return false;
|
| 271 |
|
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}
|
| 272 |
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|
| 273 |
|
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/*
|
| 274 |
|
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* Return ISAKMP SA details
|
| 275 |
|
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*/
|
| 276 |
|
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function ipsec_lookup_isakmp_sa($in_srcip,$in_dstip) {
|
| 277 |
|
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/* TODO : use racconctl to lookup iskamp SA */
|
| 278 |
|
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return NULL;
|
| 279 |
|
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}
|
| 280 |
|
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|
| 281 |
|
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/*
|
| 282 |
|
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* Return IPsec SA details
|
| 283 |
|
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*/
|
| 284 |
|
|
function ipsec_lookup_ipsec_sa(& $spd,& $sad,$dir,$in_srcip,$in_dstip,$in_srcid,$in_dstid) {
|
| 285 |
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|
| 286 |
|
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/* match the phase1/2 to an SP */
|
| 287 |
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|
| 288 |
|
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foreach($spd as $sp) {
|
| 289 |
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|
| 290 |
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/* match direction */
|
| 291 |
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| 292 |
|
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if($dir != $sp['dir'])
|
| 293 |
|
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continue;
|
| 294 |
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|
| 295 |
|
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/* match IPs */
|
| 296 |
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|
| 297 |
|
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if($in_srcip != $sp['src'])
|
| 298 |
|
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continue;
|
| 299 |
|
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if($in_dstip != $sp['dst'])
|
| 300 |
|
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continue;
|
| 301 |
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|
|
| 302 |
|
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/* add netbits for address IDs */
|
| 303 |
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|
| 304 |
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$sp_srcid = $sp['srcid'];
|
| 305 |
|
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$sp_dstid = $sp['dstid'];
|
| 306 |
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| 307 |
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if (!strstr($sp_srcid,"/"))
|
| 308 |
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$sp_srcid .= '/32';
|
| 309 |
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if (!strstr($sp_dstid,"/"))
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| 310 |
|
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$sp_dstid .= '/32';
|
| 311 |
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| 312 |
|
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/* match IDs */
|
| 313 |
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|
| 314 |
|
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if($in_srcid != $sp_srcid)
|
| 315 |
|
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continue;
|
| 316 |
|
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if($in_dstid != $sp_dstid)
|
| 317 |
|
|
continue;
|
| 318 |
|
|
|
| 319 |
|
|
/* match the SP to a unique SA by reqid */
|
| 320 |
|
|
|
| 321 |
|
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foreach($sad as $sa) {
|
| 322 |
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|
|
| 323 |
|
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/* match REQIDs */
|
| 324 |
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|
| 325 |
|
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if($sa[reqid] != $sp[reqid])
|
| 326 |
|
|
continue;
|
| 327 |
|
|
|
| 328 |
|
|
/* sanitize for NAT-T ports */
|
| 329 |
|
|
|
| 330 |
|
|
$sa_srcip = $sa['src'];
|
| 331 |
|
|
$sa_dstip = $sa['dst'];
|
| 332 |
|
|
|
| 333 |
|
|
if (strstr($sa_srcip,"["))
|
| 334 |
|
|
$sa_srcip = substr($sa_srcip,0,strcspn($sa_srcip,"["));
|
| 335 |
|
|
if (strstr($sa_dstip,"["))
|
| 336 |
|
|
$sa_dstip = substr($sa_dstip,0,strcspn($sa_dstip,"["));
|
| 337 |
|
|
|
| 338 |
|
|
/* match IPs */
|
| 339 |
|
|
|
| 340 |
|
|
if($in_srcip != $sa_srcip)
|
| 341 |
|
|
continue;
|
| 342 |
|
|
if($in_dstip != $sa_dstip)
|
| 343 |
|
|
continue;
|
| 344 |
|
|
|
| 345 |
|
|
return $sa;
|
| 346 |
|
|
}
|
| 347 |
|
|
}
|
| 348 |
|
|
|
| 349 |
|
|
return NULL;
|
| 350 |
|
|
}
|
| 351 |
|
|
|
| 352 |
|
|
/*
|
| 353 |
|
|
* Return dump of SPD table
|
| 354 |
|
|
*/
|
| 355 |
|
|
function ipsec_dump_spd()
|
| 356 |
|
|
{
|
| 357 |
|
|
$fd = @popen("/usr/local/sbin/setkey -DP", "r");
|
| 358 |
|
|
$spd = array();
|
| 359 |
|
|
if ($fd) {
|
| 360 |
|
|
while (!feof($fd)) {
|
| 361 |
|
|
$line = chop(fgets($fd));
|
| 362 |
|
|
if (!$line)
|
| 363 |
|
|
continue;
|
| 364 |
|
|
if ($line == "No SPD entries.")
|
| 365 |
|
|
break;
|
| 366 |
|
|
if ($line[0] != "\t") {
|
| 367 |
|
|
if (is_array($cursp))
|
| 368 |
|
|
$spd[] = $cursp;
|
| 369 |
|
|
$cursp = array();
|
| 370 |
|
|
$linea = explode(" ", $line);
|
| 371 |
|
|
$cursp['srcid'] = substr($linea[0], 0, strpos($linea[0], "["));
|
| 372 |
|
|
$cursp['dstid'] = substr($linea[1], 0, strpos($linea[1], "["));
|
| 373 |
|
|
$i = 0;
|
| 374 |
|
|
} else if (is_array($cursp)) {
|
| 375 |
|
|
$linea = explode(" ", trim($line));
|
| 376 |
|
|
switch($i)
|
| 377 |
|
|
{
|
| 378 |
|
|
case 1:
|
| 379 |
|
|
if ($linea[1] == "none") /* don't show default anti-lockout rule */
|
| 380 |
|
|
unset($cursp);
|
| 381 |
|
|
else
|
| 382 |
|
|
$cursp['dir'] = $linea[0];
|
| 383 |
|
|
break;
|
| 384 |
|
|
case 2:
|
| 385 |
|
|
$upperspec = explode("/", $linea[0]);
|
| 386 |
|
|
$cursp['proto'] = $upperspec[0];
|
| 387 |
|
|
list($cursp['src'], $cursp['dst']) = explode("-", $upperspec[2]);
|
| 388 |
|
|
$cursp['reqid'] = substr($upperspec[3], strpos($upperspec[3], "#")+1);
|
| 389 |
|
|
break;
|
| 390 |
|
|
}
|
| 391 |
|
|
}
|
| 392 |
|
|
$i++;
|
| 393 |
|
|
}
|
| 394 |
|
|
if (is_array($cursp) && count($cursp))
|
| 395 |
|
|
$spd[] = $cursp;
|
| 396 |
|
|
pclose($fd);
|
| 397 |
|
|
}
|
| 398 |
|
|
|
| 399 |
|
|
return $spd;
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
/*
|
| 403 |
|
|
* Return dump of SAD table
|
| 404 |
|
|
*/
|
| 405 |
|
|
function ipsec_dump_sad()
|
| 406 |
|
|
{
|
| 407 |
|
|
$fd = @popen("/usr/local/sbin/setkey -D", "r");
|
| 408 |
|
|
$sad = array();
|
| 409 |
|
|
if ($fd) {
|
| 410 |
|
|
while (!feof($fd)) {
|
| 411 |
|
|
$line = chop(fgets($fd));
|
| 412 |
|
|
if (!$line)
|
| 413 |
|
|
continue;
|
| 414 |
|
|
if ($line == "No SAD entries.")
|
| 415 |
|
|
break;
|
| 416 |
|
|
if ($line[0] != "\t")
|
| 417 |
|
|
{
|
| 418 |
|
|
if (is_array($cursa))
|
| 419 |
|
|
$sad[] = $cursa;
|
| 420 |
|
|
$cursa = array();
|
| 421 |
|
|
list($cursa['src'],$cursa['dst']) = explode(" ", $line);
|
| 422 |
|
|
$i = 0;
|
| 423 |
|
|
}
|
| 424 |
|
|
else
|
| 425 |
|
|
{
|
| 426 |
|
|
$linea = explode(" ", trim($line));
|
| 427 |
|
|
switch ($i) {
|
| 428 |
|
|
case 1:
|
| 429 |
|
|
$cursa['proto'] = $linea[0];
|
| 430 |
|
|
$cursa['spi'] = substr($linea[2], strpos($linea[2], "x")+1, -1);
|
| 431 |
|
|
$reqid = substr($linea[3], strpos($linea[3], "=")+1);
|
| 432 |
|
|
$cursa['reqid'] = substr($reqid, 0, strcspn($reqid,"("));
|
| 433 |
|
|
break;
|
| 434 |
|
|
case 2:
|
| 435 |
|
|
$cursa['ealgo'] = $linea[1];
|
| 436 |
|
|
break;
|
| 437 |
|
|
case 3:
|
| 438 |
|
|
$cursa['aalgo'] = $linea[1];
|
| 439 |
|
|
break;
|
| 440 |
|
|
}
|
| 441 |
|
|
}
|
| 442 |
|
|
$i++;
|
| 443 |
|
|
}
|
| 444 |
|
|
if (is_array($cursa) && count($cursa))
|
| 445 |
|
|
$sad[] = $cursa;
|
| 446 |
|
|
pclose($fd);
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
return $sad;
|
| 450 |
|
|
}
|
| 451 |
|
|
|
| 452 |
|
|
?>
|