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