231 lines
6.1 KiB
C
231 lines
6.1 KiB
C
/*
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* Copyright (C) 2009 Martin Willi
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/*
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* Copyright (C) 2016 secunet Security Networks AG
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* Copyright (C) 2016 Thomas Egerer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "ike_vendor.h"
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#include <daemon.h>
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#include <encoding/payloads/vendor_id_payload.h>
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typedef struct private_ike_vendor_t private_ike_vendor_t;
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/**
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* Private data of an ike_vendor_t object.
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*/
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struct private_ike_vendor_t {
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/**
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* Public ike_vendor_t interface.
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*/
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ike_vendor_t public;
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/**
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* Associated IKE_SA
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*/
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ike_sa_t *ike_sa;
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/**
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* Are we the initiator of this task
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*/
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bool initiator;
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};
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/**
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* Vendor ID database entry
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*/
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typedef struct {
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/* Description */
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char *desc;
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/* extension flag negotiated with vendor ID, if any */
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ike_extension_t extension;
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/* Value from strongswan.conf, whether to send vendor ID */
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char *setting;
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/* length of vendor ID string, 0 for NULL terminated */
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int len;
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/* vendor ID string */
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char *id;
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} vid_data_t;
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/**
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* Get the data of a vendor ID as a chunk
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*/
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static chunk_t get_vid_data(vid_data_t *data)
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{
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return chunk_create(data->id, data->len ?: strlen(data->id));
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}
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/**
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* IKEv2 Vendor ID database entry
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*/
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static vid_data_t vids[] = {
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/* strongSwan MD5("strongSwan") */
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{ "strongSwan", EXT_STRONGSWAN, "send_vendor_id", 16,
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"\x88\x2f\xe5\x6d\x6f\xd2\x0d\xbc\x22\x51\x61\x3b\x2e\xbe\x5b\xeb"},
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{ "Cisco Delete Reason", 0, NULL, 0,
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"CISCO-DELETE-REASON" },
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{ "Cisco FlexVPN Supported", 0, "cisco_flexvpn", 0,
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"FLEXVPN-SUPPORTED" },
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{ "Cisco Copyright (c) 2009", 0, NULL, 0,
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"CISCO(COPYRIGHT)&Copyright (c) 2009 Cisco Systems, Inc." },
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{ "FRAGMENTATION", 0, NULL, 16,
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"\x40\x48\xb7\xd5\x6e\xbc\xe8\x85\x25\xe7\xde\x7f\x00\xd6\xc2\xd3"},
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{ "MS NT5 ISAKMPOAKLEY v7", 0, NULL, 20,
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"\x1e\x2b\x51\x69\x05\x99\x1c\x7d\x7c\x96\xfc\xbf\xb5\x87\xe4\x61\x00\x00\x00\x07"},
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{ "MS NT5 ISAKMPOAKLEY v8", 0, NULL, 20,
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"\x1e\x2b\x51\x69\x05\x99\x1c\x7d\x7c\x96\xfc\xbf\xb5\x87\xe4\x61\x00\x00\x00\x08"},
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{ "MS NT5 ISAKMPOAKLEY v9", 0, NULL, 20,
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"\x1e\x2b\x51\x69\x05\x99\x1c\x7d\x7c\x96\xfc\xbf\xb5\x87\xe4\x61\x00\x00\x00\x09"},
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{ "MS-Negotiation Discovery Capable", 0, NULL, 16,
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"\xfb\x1d\xe3\xcd\xf3\x41\xb7\xea\x16\xb7\xe5\xbe\x08\x55\xf1\x20"},
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{ "Vid-Initial-Contact", 0, NULL, 16,
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"\x26\x24\x4d\x38\xed\xdb\x61\xb3\x17\x2a\x36\xe3\xd0\xcf\xb8\x19"},
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};
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METHOD(task_t, build, status_t,
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private_ike_vendor_t *this, message_t *message)
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{
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vendor_id_payload_t *vid;
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bool send_vid;
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int i;
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for (i = 0; i < countof(vids); i++)
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{
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send_vid = FALSE;
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if (vids[i].setting)
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{
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send_vid = lib->settings->get_bool(lib->settings, "%s.%s", send_vid,
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lib->ns, vids[i].setting);
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}
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if (send_vid)
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{
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DBG2(DBG_IKE, "sending %s vendor ID", vids[i].desc);
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vid = vendor_id_payload_create_data(PLV2_VENDOR_ID,
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chunk_clone(get_vid_data(&vids[i])));
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message->add_payload(message, &vid->payload_interface);
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}
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}
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return this->initiator ? NEED_MORE : SUCCESS;
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}
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METHOD(task_t, process, status_t,
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private_ike_vendor_t *this, message_t *message)
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{
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enumerator_t *enumerator;
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payload_t *payload;
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int i;
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enumerator = message->create_payload_enumerator(message);
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while (enumerator->enumerate(enumerator, &payload))
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{
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if (payload->get_type(payload) == PLV2_VENDOR_ID)
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{
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vendor_id_payload_t *vid;
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chunk_t data;
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bool found = FALSE;
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vid = (vendor_id_payload_t*)payload;
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data = vid->get_data(vid);
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for (i = 0; i < countof(vids); i++)
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{
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if (chunk_equals(get_vid_data(&vids[i]), data))
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{
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DBG1(DBG_IKE, "received %s vendor ID", vids[i].desc);
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if (vids[i].extension)
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{
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this->ike_sa->enable_extension(this->ike_sa,
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vids[i].extension);
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}
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found = TRUE;
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break;
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}
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}
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if (!found)
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{
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DBG1(DBG_ENC, "received unknown vendor ID: %#B", &data);
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}
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}
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}
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enumerator->destroy(enumerator);
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return this->initiator ? SUCCESS : NEED_MORE;
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}
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METHOD(task_t, migrate, void,
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private_ike_vendor_t *this, ike_sa_t *ike_sa)
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{
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this->ike_sa = ike_sa;
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}
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METHOD(task_t, get_type, task_type_t,
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private_ike_vendor_t *this)
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{
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return TASK_IKE_VENDOR;
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}
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METHOD(task_t, destroy, void,
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private_ike_vendor_t *this)
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{
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free(this);
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}
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/**
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* See header
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*/
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ike_vendor_t *ike_vendor_create(ike_sa_t *ike_sa, bool initiator)
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{
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private_ike_vendor_t *this;
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INIT(this,
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.public = {
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.task = {
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.build = _build,
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.process = _process,
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.migrate = _migrate,
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.get_type = _get_type,
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.destroy = _destroy,
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},
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},
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.initiator = initiator,
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.ike_sa = ike_sa,
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);
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return &this->public;
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}
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