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/*
* Copyright (C) 2010 Martin Willi, revosec AG
* Copyright (C) 2010 Andreas Steffen, HSR 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.
*/
#include "eap_ttls.h"
#include "eap_ttls_peer.h"
#include "eap_ttls_server.h"
#include <tls_eap.h>
#include <daemon.h>
#include <library.h>
typedef struct private_eap_ttls_t private_eap_ttls_t;
/**
* Private data of an eap_ttls_t object.
*/
struct private_eap_ttls_t {
/**
* Public interface.
*/
eap_ttls_t public;
/**
* Number of EAP-TLS messages processed so far
*/
int processed;
/**
* TLS stack, wrapped by EAP helper
*/
tls_eap_t *tls_eap;
};
/** Maximum number of EAP-TTLS messages/fragments allowed */
#define MAX_EAP_TTLS_MESSAGE_COUNT 32
METHOD(eap_method_t, initiate, status_t,
private_eap_ttls_t *this, eap_payload_t **out)
{
chunk_t data;
if (this->tls_eap->initiate(this->tls_eap, &data) == NEED_MORE)
{
*out = eap_payload_create_data(data);
free(data.ptr);
return NEED_MORE;
}
return FAILED;
}
METHOD(eap_method_t, process, status_t,
private_eap_ttls_t *this, eap_payload_t *in, eap_payload_t **out)
{
status_t status;
chunk_t data;
if (++this->processed > MAX_EAP_TTLS_MESSAGE_COUNT)
{
DBG1(DBG_IKE, "EAP-TTLS packet count exceeded (%d > %d)",
this->processed, MAX_EAP_TTLS_MESSAGE_COUNT);
return FAILED;
}
data = in->get_data(in);
status = this->tls_eap->process(this->tls_eap, data, &data);
if (status == NEED_MORE)
{
*out = eap_payload_create_data(data);
free(data.ptr);
}
return status;
}
METHOD(eap_method_t, get_type, eap_type_t,
private_eap_ttls_t *this, u_int32_t *vendor)
{
*vendor = 0;
return EAP_TTLS;
}
METHOD(eap_method_t, get_msk, status_t,
private_eap_ttls_t *this, chunk_t *msk)
{
*msk = this->tls_eap->get_msk(this->tls_eap);
if (msk->len)
{
return SUCCESS;
}
return FAILED;
}
METHOD(eap_method_t, is_mutual, bool,
private_eap_ttls_t *this)
{
return TRUE;
}
METHOD(eap_method_t, destroy, void,
private_eap_ttls_t *this)
{
this->tls_eap->destroy(this->tls_eap);
free(this);
}
/**
* Generic private constructor
*/
static eap_ttls_t *eap_ttls_create(identification_t *server,
identification_t *peer, bool is_server,
tls_application_t *application)
{
private_eap_ttls_t *this;
INIT(this,
.public = {
.eap_method = {
.initiate = _initiate,
.process = _process,
.get_type = _get_type,
.is_mutual = _is_mutual,
.get_msk = _get_msk,
.destroy = _destroy,
},
},
);
if (is_server && !lib->settings->get_bool(lib->settings,
"charon.plugins.eap-ttls.request_peer_auth", FALSE))
{
peer = NULL;
}
this->tls_eap = tls_eap_create(EAP_TTLS, is_server,
server, peer, application);
if (!this->tls_eap)
{
application->destroy(application);
free(this);
return NULL;
}
return &this->public;
}
eap_ttls_t *eap_ttls_create_server(identification_t *server,
identification_t *peer)
{
return eap_ttls_create(server, peer, TRUE,
&eap_ttls_server_create(server, peer)->application);
}
eap_ttls_t *eap_ttls_create_peer(identification_t *server,
identification_t *peer)
{
return eap_ttls_create(server, peer, FALSE,
&eap_ttls_peer_create(server, peer)->application);
}
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