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/*
* Copyright (C) 2011 Andreas Steffen
* Copyright (C) 2011 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_peap_peer.h"
#include "eap_peap_avp.h"
#include <utils/debug.h>
#include <daemon.h>
typedef struct private_eap_peap_peer_t private_eap_peap_peer_t;
/**
* Private data of an eap_peap_peer_t object.
*/
struct private_eap_peap_peer_t {
/**
* Public eap_peap_peer_t interface.
*/
eap_peap_peer_t public;
/**
* Server identity
*/
identification_t *server;
/**
* Peer identity
*/
identification_t *peer;
/**
* Outer phase 1 EAP method
*/
eap_method_t *ph1_method;
/**
* Current phase 2 EAP method
*/
eap_method_t *ph2_method;
/**
* Pending outbound EAP message
*/
eap_payload_t *out;
/**
* AVP handler
*/
eap_peap_avp_t *avp;
};
METHOD(tls_application_t, process, status_t,
private_eap_peap_peer_t *this, bio_reader_t *reader)
{
chunk_t data = chunk_empty;
status_t status;
payload_t *payload;
eap_payload_t *in;
eap_code_t code;
eap_type_t type, received_type;
u_int32_t vendor, received_vendor;
status = this->avp->process(this->avp, reader, &data,
this->ph1_method->get_identifier(this->ph1_method));
switch (status)
{
case SUCCESS:
break;
case NEED_MORE:
return NEED_MORE;
case FAILED:
default:
return FAILED;
}
in = eap_payload_create_data(data);
DBG3(DBG_IKE, "%B", &data);
chunk_free(&data);
payload = (payload_t*)in;
if (payload->verify(payload) != SUCCESS)
{
in->destroy(in);
return FAILED;
}
code = in->get_code(in);
if (code == EAP_REQUEST || code == EAP_RESPONSE)
{
received_type = in->get_type(in, &received_vendor);
DBG1(DBG_IKE, "received tunneled EAP-PEAP AVP [EAP/%N/%N]",
eap_code_short_names, code,
eap_type_short_names, received_type);
if (code != EAP_REQUEST)
{
DBG1(DBG_IKE, "%N expected", eap_code_names, EAP_REQUEST);
in->destroy(in);
return FAILED;
}
}
else
{
DBG1(DBG_IKE, "received tunneled EAP-PEAP AVP [EAP/%N]",
eap_code_short_names, code);
this->out = eap_payload_create_code(code, in->get_identifier(in));
in->destroy(in);
return NEED_MORE;
}
/* yet another phase2 authentication? */
if (this->ph2_method)
{
type = this->ph2_method->get_type(this->ph2_method, &vendor);
if (type != received_type || vendor != received_vendor)
{
this->ph2_method->destroy(this->ph2_method);
this->ph2_method = NULL;
}
}
if (this->ph2_method == NULL)
{
if (received_vendor)
{
DBG1(DBG_IKE, "server requested vendor specific EAP method %d-%d "
"(id 0x%02X", received_type, received_vendor,
in->get_identifier(in));
}
else
{
DBG1(DBG_IKE, "server requested %N authentication (id 0x%02X)",
eap_type_names, received_type, in->get_identifier(in));
}
this->ph2_method = charon->eap->create_instance(charon->eap,
received_type, received_vendor,
EAP_PEER, this->server, this->peer);
if (!this->ph2_method)
{
DBG1(DBG_IKE, "EAP method not supported");
this->out = eap_payload_create_nak(in->get_identifier(in), 0, 0,
in->is_expanded(in));
in->destroy(in);
return NEED_MORE;
}
type = this->ph2_method->get_type(this->ph2_method, &vendor);
}
status = this->ph2_method->process(this->ph2_method, in, &this->out);
in->destroy(in);
switch (status)
{
case SUCCESS:
this->ph2_method->destroy(this->ph2_method);
this->ph2_method = NULL;
/* fall through to NEED_MORE */
case NEED_MORE:
return NEED_MORE;
case FAILED:
default:
if (vendor)
{
DBG1(DBG_IKE, "vendor specific EAP method %d-%d failed",
type, vendor);
}
else
{
DBG1(DBG_IKE, "%N method failed", eap_type_names, type);
}
return FAILED;
}
}
METHOD(tls_application_t, build, status_t,
private_eap_peap_peer_t *this, bio_writer_t *writer)
{
chunk_t data;
eap_code_t code;
eap_type_t type;
u_int32_t vendor;
if (this->out)
{
code = this->out->get_code(this->out);
type = this->out->get_type(this->out, &vendor);
if (code == EAP_REQUEST || code == EAP_RESPONSE)
{
DBG1(DBG_IKE, "sending tunneled EAP-PEAP AVP [EAP/%N/%N]",
eap_code_short_names, code, eap_type_short_names, type);
}
else
{
DBG1(DBG_IKE, "sending tunneled EAP-PEAP AVP [EAP/%N]",
eap_code_short_names, code);
}
/* get the raw EAP message data */
data = this->out->get_data(this->out);
DBG3(DBG_IKE, "%B", &data);
this->avp->build(this->avp, writer, data);
this->out->destroy(this->out);
this->out = NULL;
}
return INVALID_STATE;
}
METHOD(tls_application_t, destroy, void,
private_eap_peap_peer_t *this)
{
this->server->destroy(this->server);
this->peer->destroy(this->peer);
DESTROY_IF(this->ph2_method);
DESTROY_IF(this->out);
this->avp->destroy(this->avp);
free(this);
}
/**
* See header
*/
eap_peap_peer_t *eap_peap_peer_create(identification_t *server,
identification_t *peer,
eap_method_t *eap_method)
{
private_eap_peap_peer_t *this;
INIT(this,
.public = {
.application = {
.process = _process,
.build = _build,
.destroy = _destroy,
},
},
.server = server->clone(server),
.peer = peer->clone(peer),
.ph1_method = eap_method,
.avp = eap_peap_avp_create(FALSE),
);
return &this->public;
}
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