179 lines
3.9 KiB
C
179 lines
3.9 KiB
C
/*
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* Copyright (C) 2010 Andreas Steffen
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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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#include "eap_tnc.h"
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#include <tls_eap.h>
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#include <daemon.h>
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#include <debug.h>
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typedef struct private_eap_tnc_t private_eap_tnc_t;
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/**
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* Private data of an eap_tnc_t object.
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*/
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struct private_eap_tnc_t {
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/**
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* Public authenticator_t interface.
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*/
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eap_tnc_t public;
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/**
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* TLS stack, wrapped by EAP helper
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*/
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tls_eap_t *tls_eap;
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};
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/** Maximum number of EAP-TNC messages/fragments allowed */
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#define MAX_MESSAGE_COUNT 10
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/** Default size of a EAP-TNC fragment */
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#define MAX_FRAGMENT_LEN 50000
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METHOD(eap_method_t, initiate, status_t,
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private_eap_tnc_t *this, eap_payload_t **out)
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{
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chunk_t data;
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if (this->tls_eap->initiate(this->tls_eap, &data) == NEED_MORE)
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{
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*out = eap_payload_create_data(data);
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free(data.ptr);
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return NEED_MORE;
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}
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return FAILED;
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}
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METHOD(eap_method_t, process, status_t,
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private_eap_tnc_t *this, eap_payload_t *in, eap_payload_t **out)
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{
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status_t status;
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chunk_t data;
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data = in->get_data(in);
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status = this->tls_eap->process(this->tls_eap, data, &data);
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if (status == NEED_MORE)
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{
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*out = eap_payload_create_data(data);
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free(data.ptr);
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}
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return status;
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}
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METHOD(eap_method_t, get_type, eap_type_t,
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private_eap_tnc_t *this, u_int32_t *vendor)
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{
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*vendor = 0;
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return EAP_TNC;
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}
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METHOD(eap_method_t, get_msk, status_t,
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private_eap_tnc_t *this, chunk_t *msk)
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{
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*msk = this->tls_eap->get_msk(this->tls_eap);
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if (msk->len)
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{
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return SUCCESS;
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}
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return FAILED;
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}
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METHOD(eap_method_t, is_mutual, bool,
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private_eap_tnc_t *this)
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{
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return FALSE;
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}
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METHOD(eap_method_t, destroy, void,
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private_eap_tnc_t *this)
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{
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this->tls_eap->destroy(this->tls_eap);
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free(this);
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}
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/**
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* Generic private constructor
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*/
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static eap_tnc_t *eap_tnc_create(identification_t *server,
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identification_t *peer, bool is_server)
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{
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private_eap_tnc_t *this;
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size_t frag_size;
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int max_msg_count;
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char* protocol;
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tnccs_type_t type;
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tnccs_t *tnccs;
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INIT(this,
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.public = {
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.eap_method = {
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.initiate = _initiate,
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.process = _process,
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.get_type = _get_type,
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.is_mutual = _is_mutual,
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.get_msk = _get_msk,
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.destroy = _destroy,
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},
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},
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);
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frag_size = lib->settings->get_int(lib->settings,
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"charon.plugins.eap-tnc.fragment_size", MAX_FRAGMENT_LEN);
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max_msg_count = lib->settings->get_int(lib->settings,
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"charon.plugins.eap-tnc.max_message_count", MAX_MESSAGE_COUNT);
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protocol = lib->settings->get_str(lib->settings,
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"charon.plugins.eap-tnc.protocol", "tnccs-1.1");
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if (strcaseeq(protocol, "tnccs-2.0"))
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{
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type = TNCCS_2_0;
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}
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else if (strcaseeq(protocol, "tnccs-1.1"))
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{
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type = TNCCS_1_1;
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}
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else if (strcaseeq(protocol, "tnccs-dynamic") && is_server)
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{
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type = TNCCS_DYNAMIC;
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}
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else
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{
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DBG1(DBG_TNC, "TNCCS protocol '%s' not supported", protocol);
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free(this);
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return NULL;
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}
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tnccs = charon->tnccs->create_instance(charon->tnccs, type, is_server);
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this->tls_eap = tls_eap_create(EAP_TNC, (tls_t*)tnccs, frag_size, max_msg_count);
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if (!this->tls_eap)
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{
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free(this);
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return NULL;
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}
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return &this->public;
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}
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eap_tnc_t *eap_tnc_create_server(identification_t *server,
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identification_t *peer)
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{
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return eap_tnc_create(server, peer, TRUE);
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}
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eap_tnc_t *eap_tnc_create_peer(identification_t *server,
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identification_t *peer)
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{
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return eap_tnc_create(server, peer, FALSE);
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}
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