text: /*
   * IEEE 802.1X-2004 Authenticator - EAPOL state machine
   * Copyright (c) 2002-2015, Jouni Malinen <j@w1.fi>
   *
   * This software may be distributed under the terms of the BSD license.
   * See README for more details.
   */
  
  #include "includes.h"
  
  #include "common.h"
  #include "eloop.h"
  #include "state_machine.h"
  #include "common/eapol_common.h"
  #include "eap_common/eap_defs.h"
  #include "eap_common/eap_common.h"
  #include "eap_server/eap.h"
  #include "eapol_auth_sm.h"
  #include "eapol_auth_sm_i.h"
  
  #define STATE_MACHINE_DATA struct eapol_state_machine
  #define STATE_MACHINE_DEBUG_PREFIX "IEEE 802.1X"
  #define STATE_MACHINE_ADDR sm->addr
  
  static const struct eapol_callbacks eapol_cb;
  
  /* EAPOL state machines are described in IEEE Std 802.1X-2004, Chap. 8.2 */
  
  #define setPortAuthorized() \
  sm->eapol->cb.set_port_authorized(sm->eapol->conf.ctx, sm->sta, 1)
  #define setPortUnauthorized() \
  sm->eapol->cb.set_port_authorized(sm->eapol->conf.ctx, sm->sta, 0)
  
  /* procedures */
  #define txCannedFail() eapol_auth_tx_canned_eap(sm, 0)
  #define txCannedSuccess() eapol_auth_tx_canned_eap(sm, 1)
  #define txReq() eapol_auth_tx_req(sm)
  #define abortAuth() sm->eapol->cb.abort_auth(sm->eapol->conf.ctx, sm->sta)
  #define txKey() sm->eapol->cb.tx_key(sm->eapol->conf.ctx, sm->sta)
  #define processKey() do { } while (0)
  
  
  static void eapol_sm_step_run(struct eapol_state_machine *sm);
  static void eapol_sm_step_cb(void *eloop_ctx, void *timeout_ctx);
  static void eapol_auth_initialize(struct eapol_state_machine *sm);
  static void eapol_auth_conf_free(struct eapol_auth_config *conf);
  
  
  static void eapol_auth_logger(struct eapol_authenticator *eapol,
  			      const u8 *addr, eapol_logger_level level,
  			      const char *txt)
  {
  	if (eapol->cb.logger == NULL)
  		return;
  	eapol->cb.logger(eapol->conf.ctx, addr, level, txt);
  }
  
  
  static void eapol_auth_vlogger(struct eapol_authenticator *eapol,
  			       const u8 *addr, eapol_logger_level level,
  			       const char *fmt, ...)
  {
  	char *format;
  	int maxlen;
  	va_list ap;
  
  	if (eapol->cb.logger == NULL)
  		return;
  
  	maxlen = os_strlen(fmt) + 100;
  	format = os_malloc(maxlen);
  	if (!format)
  		return;
  
  	va_start(ap, fmt);
  	vsnprintf(format, maxlen, fmt, ap);
  	va_end(ap);
  
  	eapol_auth_logger(eapol, addr, level, format);
  
  	os_free(format);
  }
  
  
  static void eapol_auth_tx_canned_eap(struct eapol_state_machine *sm,
  				     int success)
  {
  	struct eap_hdr eap;
  
  	os_memset(&eap, 0, sizeof(eap));
  
  	eap.code = success ? EAP_CODE_SUCCESS : EAP_CODE_FAILURE;
  	eap.identifier = ++sm->last_eap_id;
  	eap.length = host_to_be16(sizeof(eap));
  
  	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_DEBUG,
  			   "Sending canned EAP packet %s (identifier %d)",
  			   success ? "SUCCESS" : "FAILURE", eap.identifier);
  	sm->eapol->cb.eapol_send(sm->eapol->conf.ctx, sm->sta,
  				 IEEE802_1X_TYPE_EAP_PACKET,
  				 (u8 *) &eap, sizeof(eap));
  	sm->dot1xAuthEapolFramesTx++;
  }
  
  
  static void eapol_auth_tx_req(struct eapol_state_machine *sm)
  {
  	if (sm->eap_if->eapReqData == NULL ||
  	    wpabuf_len(sm->eap_if->eapReqData) < sizeof(struct eap_hdr)) {
  		eapol_auth_logger(sm->eapol, sm->addr,
  				  EAPOL_LOGGER_DEBUG,
  				  "TxReq called, but there is no EAP request "
  				  "from authentication server");
  		return;
  	}
  
  	if (sm->flags & EAPOL_SM_WAIT_START) {
  		wpa_printf(MSG_DEBUG, "EAPOL: Drop EAPOL TX to " MACSTR
  			   " while waiting for EAPOL-Start",
  			   MAC2STR(sm->addr));
  		return;
  	}
  
  	sm->last_eap_id = eap_get_id(sm->eap_if->eapReqData);
  	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_DEBUG,
  			   "Sending EAP Packet (identifier %d)",
  			   sm->last_eap_id);
  	sm->eapol->cb.eapol_send(sm->eapol->conf.ctx, sm->sta,
  				 IEEE802_1X_TYPE_EAP_PACKET,
  				 wpabuf_head(sm->eap_if->eapReqData),
  				 wpabuf_len(sm->eap_if->eapReqData));
  	sm->dot1xAuthEapolFramesTx++;
  	if (eap_get_type(sm->eap_if->eapReqData) == EAP_TYPE_IDENTITY)
  		sm->dot1xAuthEapolReqIdFramesTx++;
  	else
  		sm->dot1xAuthEapolReqFramesTx++;
  }
  
  
  /**
   * eapol_port_timers_tick - Port Timers state machine
   * @eloop_ctx: struct eapol_state_machine *
   * @timeout_ctx: Not used
   *
   * This statemachine is implemented as a function that will be called
   * once a second as a registered event loop timeout.
   */
  static void eapol_port_timers_tick(void *eloop_ctx, void *timeout_ctx)
  {
  	struct eapol_state_machine *state = timeout_ctx;
  
  	if (state->aWhile > 0) {
  		state->aWhile--;
  		if (state->aWhile == 0) {
  			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
  				   " - aWhile --> 0",
  				   MAC2STR(state->addr));
  		}
  	}
  
  	if (state->quietWhile > 0) {
  		state->quietWhile--;
  		if (state->quietWhile == 0) {
  			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
  				   " - quietWhile --> 0",
  				   MAC2STR(state->addr));
  		}
  	}
  
  	if (state->reAuthWhen > 0) {
  		state->reAuthWhen--;
  		if (state->reAuthWhen == 0) {
  			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
  				   " - reAuthWhen --> 0",
  				   MAC2STR(state->addr));
  		}
  	}
  
  	if (state->eap_if->retransWhile > 0) {
  		state->eap_if->retransWhile--;
  		if (state->eap_if->retransWhile == 0) {
  			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
  				   " - (EAP) retransWhile --> 0",
  				   MAC2STR(state->addr));
  		}
  	}
  
  	eapol_sm_step_run(state);
  
  	eloop_register_timeout(1, 0, eapol_port_timers_tick, eloop_ctx, state);
  }
  
  
  
  /* Authenticator PAE state machine */
  
  SM_STATE(AUTH_PAE, INITIALIZE)
  {
  	SM_ENTRY_MA(AUTH_PAE, INITIALIZE, auth_pae);
  	sm->portMode = Auto;
  
  	/*
  	 * Clearing keyRun here is not specified in IEEE Std 802.1X-2004, but
  	 * it looks like this would be logical thing to do here since the
  	 * EAPOL-Key exchange is not possible in this state. It is possible to
  	 * get here on disconnection event without advancing to the
  	 * AUTHENTICATING state to clear keyRun before the IEEE 802.11 RSN
  	 * authenticator state machine runs and that may advance from
  	 * AUTHENTICATION2 to INITPMK if keyRun = TRUE has been left from the
  	 * last association. This can be avoided by clearing keyRun here.
  	 */
  	sm->keyRun = FALSE;
  }
  
  
  SM_STATE(AUTH_PAE, DISCONNECTED)
  {
  	int from_initialize = sm->auth_pae_state == AUTH_PAE_INITIALIZE;
  
  	if (sm->eapolLogoff) {
  		if (sm->auth_pae_state == AUTH_PAE_CONNECTING)
  			sm->authEapLogoffsWhileConnecting++;
  		else if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATED)
  			sm->authAuthEapLogoffWhileAuthenticated++;
  	}
  
  	SM_ENTRY_MA(AUTH_PAE, DISCONNECTED, auth_pae);
  
  	sm->authPortStatus = Unauthorized;
  	setPortUnauthorized();
  	sm->reAuthCount = 0;
  	sm->eapolLogoff = FALSE;
  	if (!from_initialize) {
  		sm->eapol->cb.finished(sm->eapol->conf.ctx, sm->sta, 0,
  				       sm->flags & EAPOL_SM_PREAUTH,
  				       sm->remediation);
  	}
  }
  
  
  SM_STATE(AUTH_PAE, RESTART)
  {
  	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATED) {
  		if (sm->reAuthenticate)
  			sm->authAuthReauthsWhileAuthenticated++;
  		if (sm->eapolStart)
  			sm->authAuthEapStartsWhileAuthenticated++;
  		if (sm->eapolLogoff)
  			sm->authAuthEapLogoffWhileAuthenticated++;
  	}
  
  	SM_ENTRY_MA(AUTH_PAE, RESTART, auth_pae);
  
  	sm->eap_if->eapRestart = TRUE;
  }
  
  
  SM_STATE(AUTH_PAE, CONNECTING)
  {
  	if (sm->auth_pae_state != AUTH_PAE_CONNECTING)
  		sm->authEntersConnecting++;
  
  	SM_ENTRY_MA(AUTH_PAE, CONNECTING, auth_pae);
  
  	sm->reAuthenticate = FALSE;
  	sm->reAuthCount++;
  }
  
  
  SM_STATE(AUTH_PAE, HELD)
  {
  	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATING && sm->authFail)
  		sm->authAuthFailWhileAuthenticating++;
  
  	SM_ENTRY_MA(AUTH_PAE, HELD, auth_pae);
  
  	sm->authPortStatus = Unauthorized;
  	setPortUnauthorized();
  	sm->quietWhile = sm->quietPeriod;
  	sm->eapolLogoff = FALSE;
  
  	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_WARNING,
  			   "authentication failed - EAP type: %d (%s)",
  			   sm->eap_type_authsrv,
  			   eap_server_get_name(0, sm->eap_type_authsrv));
  	if (sm->eap_type_authsrv != sm->eap_type_supp) {
  		eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_INFO,
  				   "Supplicant used different EAP type: "
  				   "%d (%s)", sm->eap_type_supp,
  				   eap_server_get_name(0, sm->eap_type_supp));
  	}
  	sm->eapol->cb.finished(sm->eapol->conf.ctx, sm->sta, 0,
  			       sm->flags & EAPOL_SM_PREAUTH, sm->remediation);
  }
  
  
  SM_STATE(AUTH_PAE, AUTHENTICATED)
  {
  	char *extra = "";
  
  	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATING && sm->authSuccess)
  		sm->authAuthSuccessesWhileAuthenticating++;
  
  	SM_ENTRY_MA(AUTH_PAE, AUTHENTICATED, auth_pae);
  
  	sm->authPortStatus = Authorized;
  	setPortAuthorized();
  	sm->reAuthCount = 0;
  	if (sm->flags & EAPOL_SM_PREAUTH)
  		extra = " (pre-authentication)";
  	else if (sm->flags & EAPOL_SM_FROM_PMKSA_CACHE)
  		extra = " (PMKSA cache)";
  	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_INFO,
  			   "authenticated - EAP type: %d (%s)%s",
  			   sm->eap_type_authsrv,
  			   eap_server_get_name(0, sm->eap_type_authsrv),
  			   extra);
  	sm->eapol->cb.finished(sm->eapol->conf.ctx, sm->sta, 1,
  			       sm->flags & EAPOL_SM_PREAUTH, sm->remediation);
  }
  
  
  SM_STATE(AUTH_PAE, AUTHENTICATING)
  {
  	SM_ENTRY_MA(AUTH_PAE, AUTHENTICATING, auth_pae);
  
  	sm->eapolStart = FALSE;
  	sm->authSuccess = FALSE;
  	sm->authFail = FALSE;
  	sm->authTimeout = FALSE;
  	sm->authStart = TRUE;
  	sm->keyRun = FALSE;
  	sm->keyDone = FALSE;
  }
  
  
  SM_STATE(AUTH_PAE, ABORTING)
  {
  	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATING) {
  		if (sm->authTimeout)
  			sm->authAuthTimeoutsWhileAuthenticating++;
  		if (sm->eapolStart)
  			sm->authAuthEapStartsWhileAuthenticating++;
  		if (sm->eapolLogoff)
  			sm->authAuthEapLogoffWhileAuthenticating++;
  	}
  
  	SM_ENTRY_MA(AUTH_PAE, ABORTING, auth_pae);
  
  	sm->authAbort = TRUE;
  	sm->keyRun = FALSE;
  	sm->keyDone = FALSE;
  }
  
  
  SM_STATE(AUTH_PAE, FORCE_AUTH)
  {
  	SM_ENTRY_MA(AUTH_PAE, FORCE_AUTH, auth_pae);
  
  	sm->authPortStatus = Authorized;
  	setPortAuthorized();
  	sm->portMode = ForceAuthorized;
  	sm->eapolStart = FALSE;
  	txCannedSuccess();
  }
  
  
  SM_STATE(AUTH_PAE, FORCE_UNAUTH)
  {
  	SM_ENTRY_MA(AUTH_PAE, FORCE_UNAUTH, auth_pae);
  
  	sm->authPortStatus = Unauthorized;
  	setPortUnauthorized();
  	sm->portMode = ForceUnauthorized;
  	sm->eapolStart = FALSE;
  	txCannedFail();
  }
  
  
  SM_STEP(AUTH_PAE)
  {
  	if ((sm->portControl == Auto && sm->portMode != sm->portControl) ||
  	    sm->initialize || !sm->eap_if->portEnabled)
  		SM_ENTER_GLOBAL(AUTH_PAE, INITIALIZE);
  	else if (sm->portControl == ForceAuthorized &&
  		 sm->portMode != sm->portControl &&
  		 !(sm->initialize || !sm->eap_if->portEnabled))
  		SM_ENTER_GLOBAL(AUTH_PAE, FORCE_AUTH);
  	else if (sm->portControl == ForceUnauthorized &&
  		 sm->portMode != sm->portControl &&
  		 !(sm->initialize || !sm->eap_if->portEnabled))
  		SM_ENTER_GLOBAL(AUTH_PAE, FORCE_UNAUTH);
  	else {
  		switch (sm->auth_pae_state) {
  		case AUTH_PAE_INITIALIZE:
  			SM_ENTER(AUTH_PAE, DISCONNECTED);
  			break;
  		case AUTH_PAE_DISCONNECTED:
  			SM_ENTER(AUTH_PAE, RESTART);
  			break;
  		case AUTH_PAE_RESTART:
  			if (!sm->eap_if->eapRestart)
  				SM_ENTER(AUTH_PAE, CONNECTING);
  			break;
  		case AUTH_PAE_HELD:
  			if (sm->quietWhile == 0)
  				SM_ENTER(AUTH_PAE, RESTART);
  			break;
  		case AUTH_PAE_CONNECTING:
  			if (sm->eapolLogoff || sm->reAuthCount > sm->reAuthMax)
  				SM_ENTER(AUTH_PAE, DISCONNECTED);
  			else if ((sm->eap_if->eapReq &&
  				  sm->reAuthCount <= sm->reAuthMax) ||
  				 sm->eap_if->eapSuccess || sm->eap_if->eapFail)
  				SM_ENTER(AUTH_PAE, AUTHENTICATING);
  			break;
  		case AUTH_PAE_AUTHENTICATED:
  			if (sm->eapolStart || sm->reAuthenticate)
  				SM_ENTER(AUTH_PAE, RESTART);
  			else if (sm->eapolLogoff || !sm->portValid)
  				SM_ENTER(AUTH_PAE, DISCONNECTED);
  			break;
  		case AUTH_PAE_AUTHENTICATING:
  			if (sm->authSuccess && sm->portValid)
  				SM_ENTER(AUTH_PAE, AUTHENTICATED);
  			else if (sm->authFail ||
  				 (sm->keyDone && !sm->portValid))
  				SM_ENTER(AUTH_PAE, HELD);
  			else if (sm->eapolStart || sm->eapolLogoff ||
  				 sm->authTimeout)
  				SM_ENTER(AUTH_PAE, ABORTING);
  			break;
  		case AUTH_PAE_ABORTING:
  			if (sm->eapolLogoff && !sm->authAbort)
  				SM_ENTER(AUTH_PAE, DISCONNECTED);
  			else if (!sm->eapolLogoff && !sm->authAbort)
  				SM_ENTER(AUTH_PAE, RESTART);
  			break;
  		case AUTH_PAE_FORCE_AUTH:
  			if (sm->eapolStart)
  				SM_ENTER(AUTH_PAE, FORCE_AUTH);
  			break;
  		case AUTH_PAE_FORCE_UNAUTH:
  			if (sm->eapolStart)
  				SM_ENTER(AUTH_PAE, FORCE_UNAUTH);
  			break;
  		}
  	}
  }
  
  
  
  /* Backend Authentication state machine */
  
  SM_STATE(BE_AUTH, INITIALIZE)
  {
  	SM_ENTRY_MA(BE_AUTH, INITIALIZE, be_auth);
  
  	abortAuth();
  	sm->eap_if->eapNoReq = FALSE;
  	sm->authAbort = FALSE;
  }
  
  
  SM_STATE(BE_AUTH, REQUEST)
  {
  	SM_ENTRY_MA(BE_AUTH, REQUEST, be_auth);
  
  	txReq();
  	sm->eap_if->eapReq = FALSE;
  	sm->backendOtherRequestsToSupplicant++;
  
  	/*
  	 * Clearing eapolEap here is not specified in IEEE Std 802.1X-2004, but
  	 * it looks like this would be logical thing to do there since the old
  	 * EAP response would not be valid anymore after the new EAP request
  	 * was sent out.
  	 *
  	 * A race condition has been reported, in which hostapd ended up
  	 * sending out EAP-Response/Identity as a response to the first
  	 * EAP-Request from the main EAP method. This can be avoided by
  	 * clearing eapolEap here.
  	 */
  	sm->eapolEap = FALSE;
  }
  
  
  SM_STATE(BE_AUTH, RESPONSE)
  {
  	SM_ENTRY_MA(BE_AUTH, RESPONSE, be_auth);
  
  	sm->authTimeout = FALSE;
  	sm->eapolEap = FALSE;
  	sm->eap_if->eapNoReq = FALSE;
  	sm->aWhile = sm->serverTimeout;
  	sm->eap_if->eapResp = TRUE;
  	/* sendRespToServer(); */
  	sm->backendResponses++;
  }
  
  
  SM_STATE(BE_AUTH, SUCCESS)
  {
  	SM_ENTRY_MA(BE_AUTH, SUCCESS, be_auth);
  
  	txReq();
  	sm->authSuccess = TRUE;
  	sm->keyRun = TRUE;
  }
  
  
  SM_STATE(BE_AUTH, FAIL)
  {
  	SM_ENTRY_MA(BE_AUTH, FAIL, be_auth);
  
  	txReq();
  	sm->authFail = TRUE;
  }
  
  
  SM_STATE(BE_AUTH, TIMEOUT)
  {
  	SM_ENTRY_MA(BE_AUTH, TIMEOUT, be_auth);
  
  	sm->authTimeout = TRUE;
  }
  
  
  SM_STATE(BE_AUTH, IDLE)
  {
  	SM_ENTRY_MA(BE_AUTH, IDLE, be_auth);
  
  	sm->authStart = FALSE;
  }
  
  
  SM_STATE(BE_AUTH, IGNORE)
  {
  	SM_ENTRY_MA(BE_AUTH, IGNORE, be_auth);
  
  	sm->eap_if->eapNoReq = FALSE;
  }
  
  
  SM_STEP(BE_AUTH)
  {
  	if (sm->portControl != Auto || sm->initialize || sm->authAbort) {
  		SM_ENTER_GLOBAL(BE_AUTH, INITIALIZE);
  		return;
  	}
  
  	switch (sm->be_auth_state) {
  	case BE_AUTH_INITIALIZE:
  		SM_ENTER(BE_AUTH, IDLE);
  		break;
  	case BE_AUTH_REQUEST:
  		if (sm->eapolEap)
  			SM_ENTER(BE_AUTH, RESPONSE);
  		else if (sm->eap_if->eapReq)
  			SM_ENTER(BE_AUTH, REQUEST);
  		else if (sm->eap_if->eapTimeout)
  			SM_ENTER(BE_AUTH, TIMEOUT);
  		break;
  	case BE_AUTH_RESPONSE:
  		if (sm->eap_if->eapNoReq)
  			SM_ENTER(BE_AUTH, IGNORE);
  		if (sm->eap_if->eapReq) {
  			sm->backendAccessChallenges++;
  			SM_ENTER(BE_AUTH, REQUEST);
  		} else if (sm->aWhile == 0)
  			SM_ENTER(BE_AUTH, TIMEOUT);
  		else if (sm->eap_if->eapFail) {
  			sm->backendAuthFails++;
  			SM_ENTER(BE_AUTH, FAIL);
  		} else if (sm->eap_if->eapSuccess) {
  			sm->backendAuthSuccesses++;
  			SM_ENTER(BE_AUTH, SUCCESS);
  		}
  		break;
  	case BE_AUTH_SUCCESS:
  		SM_ENTER(BE_AUTH, IDLE);
  		break;
  	case BE_AUTH_FAIL:
  		SM_ENTER(BE_AUTH, IDLE);
  		break;
  	case BE_AUTH_TIMEOUT:
  		SM_ENTER(BE_AUTH, IDLE);
  		break;
  	case BE_AUTH_IDLE:
  		if (sm->eap_if->eapFail && sm->authStart)
  			SM_ENTER(BE_AUTH, FAIL);
  		else if (sm->eap_if->eapReq && sm->authStart)
  			SM_ENTER(BE_AUTH, REQUEST);
  		else if (sm->eap_if->eapSuccess && sm->authStart)
  			SM_ENTER(BE_AUTH, SUCCESS);
  		break;
  	case BE_AUTH_IGNORE:
  		if (sm->eapolEap)
  			SM_ENTER(BE_AUTH, RESPONSE);
  		else if (sm->eap_if->eapReq)
  			SM_ENTER(BE_AUTH, REQUEST);
  		else if (sm->eap_if->eapTimeout)
  			SM_ENTER(BE_AUTH, TIMEOUT);
  		break;
  	}
  }
  
  
  
  /* Reauthentication Timer state machine */
  
  SM_STATE(REAUTH_TIMER, INITIALIZE)
  {
  	SM_ENTRY_MA(REAUTH_TIMER, INITIALIZE, reauth_timer);
  
  	sm->reAuthWhen = sm->reAuthPeriod;
  }
  
  
  SM_STATE(REAUTH_TIMER, REAUTHENTICATE)
  {
  	SM_ENTRY_MA(REAUTH_TIMER, REAUTHENTICATE, reauth_timer);
  
  	sm->reAuthenticate = TRUE;
  	sm->eapol->cb.eapol_event(sm->eapol->conf.ctx, sm->sta,
  				  EAPOL_AUTH_REAUTHENTICATE);
  }
  
  
  SM_STEP(REAUTH_TIMER)
  {
  	if (sm->portControl != Auto || sm->initialize ||
  	    sm->authPortStatus == Unauthorized || !sm->reAuthEnabled) {
  		SM_ENTER_GLOBAL(REAUTH_TIMER, INITIALIZE);
  		return;
  	}
  
  	switch (sm->reauth_timer_state) {
  	case REAUTH_TIMER_INITIALIZE:
  		if (sm->reAuthWhen == 0)
  			SM_ENTER(REAUTH_TIMER, REAUTHENTICATE);
  		break;
  	case REAUTH_TIMER_REAUTHENTICATE:
  		SM_ENTER(REAUTH_TIMER, INITIALIZE);
  		break;
  	}
  }
  
  
  
  /* Authenticator Key Transmit state machine */
  
  SM_STATE(AUTH_KEY_TX, NO_KEY_TRANSMIT)
  {
  	SM_ENTRY_MA(AUTH_KEY_TX, NO_KEY_TRANSMIT, auth_key_tx);
  }
  
  
  SM_STATE(AUTH_KEY_TX, KEY_TRANSMIT)
  {
  	SM_ENTRY_MA(AUTH_KEY_TX, KEY_TRANSMIT, auth_key_tx);
  
  	txKey();
  	sm->eap_if->eapKeyAvailable = FALSE;
  	sm->keyDone = TRUE;
  }
  
  
  SM_STEP(AUTH_KEY_TX)
  {
  	if (sm->initialize || sm->portControl != Auto) {
  		SM_ENTER_GLOBAL(AUTH_KEY_TX, NO_KEY_TRANSMIT);
  		return;
  	}
  
  	switch (sm->auth_key_tx_state) {
  	case AUTH_KEY_TX_NO_KEY_TRANSMIT:
  		if (sm->keyTxEnabled && sm->eap_if->eapKeyAvailable &&
  		    sm->keyRun && !(sm->flags & EAPOL_SM_USES_WPA))
  			SM_ENTER(AUTH_KEY_TX, KEY_TRANSMIT);
  		break;
  	case AUTH_KEY_TX_KEY_TRANSMIT:
  		if (!sm->keyTxEnabled || !sm->keyRun)
  			SM_ENTER(AUTH_KEY_TX, NO_KEY_TRANSMIT);
  		else if (sm->eap_if->eapKeyAvailable)
  			SM_ENTER(AUTH_KEY_TX, KEY_TRANSMIT);
  		break;
  	}
  }
  
  
  
  /* Key Receive state machine */
  
  SM_STATE(KEY_RX, NO_KEY_RECEIVE)
  {
  	SM_ENTRY_MA(KEY_RX, NO_KEY_RECEIVE, key_rx);
  }
  
  
  SM_STATE(KEY_RX, KEY_RECEIVE)
  {
  	SM_ENTRY_MA(KEY_RX, KEY_RECEIVE, key_rx);
  
  	processKey();
  	sm->rxKey = FALSE;
  }
  
  
  SM_STEP(KEY_RX)
  {
  	if (sm->initialize || !sm->eap_if->portEnabled) {
  		SM_ENTER_GLOBAL(KEY_RX, NO_KEY_RECEIVE);
  		return;
  	}
  
  	switch (sm->key_rx_state) {
  	case KEY_RX_NO_KEY_RECEIVE:
  		if (sm->rxKey)
  			SM_ENTER(KEY_RX, KEY_RECEIVE);
  		break;
  	case KEY_RX_KEY_RECEIVE:
  		if (sm->rxKey)
  			SM_ENTER(KEY_RX, KEY_RECEIVE);
  		break;
  	}
  }
  
  
  
  /* Controlled Directions state machine */
  
  SM_STATE(CTRL_DIR, FORCE_BOTH)
  {
  	SM_ENTRY_MA(CTRL_DIR, FORCE_BOTH, ctrl_dir);
  	sm->operControlledDirections = Both;
  }
  
  
  SM_STATE(CTRL_DIR, IN_OR_BOTH)
  {
  	SM_ENTRY_MA(CTRL_DIR, IN_OR_BOTH, ctrl_dir);
  	sm->operControlledDirections = sm->adminControlledDirections;
  }
  
  
  SM_STEP(CTRL_DIR)
  {
  	if (sm->initialize) {
  		SM_ENTER_GLOBAL(CTRL_DIR, IN_OR_BOTH);
  		return;
  	}
  
  	switch (sm->ctrl_dir_state) {
  	case CTRL_DIR_FORCE_BOTH:
  		if (sm->eap_if->portEnabled && sm->operEdge)
  			SM_ENTER(CTRL_DIR, IN_OR_BOTH);
  		break;
  	case CTRL_DIR_IN_OR_BOTH:
  		if (sm->operControlledDirections !=
  		    sm->adminControlledDirections)
  			SM_ENTER(CTRL_DIR, IN_OR_BOTH);
  		if (!sm->eap_if->portEnabled || !sm->operEdge)
  			SM_ENTER(CTRL_DIR, FORCE_BOTH);
  		break;
  	}
  }
  
  
  
  struct eapol_state_machine *
  eapol_auth_alloc(struct eapol_authenticator *eapol, const u8 *addr,
  		 int flags, const struct wpabuf *assoc_wps_ie,
  		 const struct wpabuf *assoc_p2p_ie, void *sta_ctx,
  		 const char *identity, const char *radius_cui)
  {
  	struct eapol_state_machine *sm;
  	struct eap_config eap_conf;
  
  	if (eapol == NULL)
  		return NULL;
  
  	sm = os_zalloc(sizeof(*sm));
  	if (sm == NULL) {
  		wpa_printf(MSG_DEBUG, "IEEE 802.1X state machine allocation "
  			   "failed");
  		return NULL;
  	}
  	sm->radius_identifier = -1;
  	os_memcpy(sm->addr, addr, ETH_ALEN);
  	sm->flags = flags;
  
  	sm->eapol = eapol;
  	sm->sta = sta_ctx;
  
  	/* Set default values for state machine constants */
  	sm->auth_pae_state = AUTH_PAE_INITIALIZE;
  	sm->quietPeriod = AUTH_PAE_DEFAULT_quietPeriod;
  	sm->reAuthMax = AUTH_PAE_DEFAULT_reAuthMax;
  
  	sm->be_auth_state = BE_AUTH_INITIALIZE;
  	sm->serverTimeout = BE_AUTH_DEFAULT_serverTimeout;
  
  	sm->reauth_timer_state = REAUTH_TIMER_INITIALIZE;
  	sm->reAuthPeriod = eapol->conf.eap_reauth_period;
  	sm->reAuthEnabled = eapol->conf.eap_reauth_period > 0 ? TRUE : FALSE;
  
  	sm->auth_key_tx_state = AUTH_KEY_TX_NO_KEY_TRANSMIT;
  
  	sm->key_rx_state = KEY_RX_NO_KEY_RECEIVE;
  
  	sm->ctrl_dir_state = CTRL_DIR_IN_OR_BOTH;
  
  	sm->portControl = Auto;
  
  	if (!eapol->conf.wpa &&
  	    (eapol->default_wep_key || eapol->conf.individual_wep_key_len > 0))
  		sm->keyTxEnabled = TRUE;
  	else
  		sm->keyTxEnabled = FALSE;
  	if (eapol->conf.wpa)
  		sm->portValid = FALSE;
  	else
  		sm->portValid = TRUE;
  
  	os_memset(&eap_conf, 0, sizeof(eap_conf));
  	eap_conf.eap_server = eapol->conf.eap_server;
  	eap_conf.ssl_ctx = eapol->conf.ssl_ctx;
  	eap_conf.msg_ctx = eapol->conf.msg_ctx;
  	eap_conf.eap_sim_db_priv = eapol->conf.eap_sim_db_priv;
  	eap_conf.pac_opaque_encr_key = eapol->conf.pac_opaque_encr_key;
  	eap_conf.eap_fast_a_id = eapol->conf.eap_fast_a_id;
  	eap_conf.eap_fast_a_id_len = eapol->conf.eap_fast_a_id_len;
  	eap_conf.eap_fast_a_id_info = eapol->conf.eap_fast_a_id_info;
  	eap_conf.eap_fast_prov = eapol->conf.eap_fast_prov;
  	eap_conf.pac_key_lifetime = eapol->conf.pac_key_lifetime;
  	eap_conf.pac_key_refresh_time = eapol->conf.pac_key_refresh_time;
  	eap_conf.eap_teap_auth = eapol->conf.eap_teap_auth;
  	eap_conf.eap_teap_pac_no_inner = eapol->conf.eap_teap_pac_no_inner;
  	eap_conf.eap_sim_aka_result_ind = eapol->conf.eap_sim_aka_result_ind;
  	eap_conf.tnc = eapol->conf.tnc;
  	eap_conf.wps = eapol->conf.wps;
  	eap_conf.assoc_wps_ie = assoc_wps_ie;
  	eap_conf.assoc_p2p_ie = assoc_p2p_ie;
  	eap_conf.peer_addr = addr;
  	eap_conf.fragment_size = eapol->conf.fragment_size;
  	eap_conf.pwd_group = eapol->conf.pwd_group;
  	eap_conf.pbc_in_m1 = eapol->conf.pbc_in_m1;
  	eap_conf.server_id = eapol->conf.server_id;
  	eap_conf.server_id_len = eapol->conf.server_id_len;
  	eap_conf.erp = eapol->conf.erp;
  	eap_conf.tls_session_lifetime = eapol->conf.tls_session_lifetime;
  	eap_conf.tls_flags = eapol->conf.tls_flags;
  	sm->eap = eap_server_sm_init(sm, &eapol_cb, &eap_conf);
  	if (sm->eap == NULL) {
  		eapol_auth_free(sm);
  		return NULL;
  	}
  	sm->eap_if = eap_get_interface(sm->eap);
  
  	eapol_auth_initialize(sm);
  
  	if (identity) {
  		sm->identity = (u8 *) os_strdup(identity);
  		if (sm->identity)
  			sm->identity_len = os_strlen(identity);
  	}
  	if (radius_cui)
  		sm->radius_cui = wpabuf_alloc_copy(radius_cui,
  						   os_strlen(radius_cui));
  
  #ifndef CONFIG_NO_RADIUS
  	if (radius_gen_session_id((u8 *) &sm->acct_multi_session_id,
  				  sizeof(sm->acct_multi_session_id)) < 0) {
  		eapol_auth_free(sm);
  		return NULL;
  	}
  #endif /* CONFIG_NO_RADIUS */
  
  	return sm;
  }
  
  
  void eapol_auth_free(struct eapol_state_machine *sm)
  {
  	if (sm == NULL)
  		return;
  
  	eloop_cancel_timeout(eapol_port_timers_tick, NULL, sm);
  	eloop_cancel_timeout(eapol_sm_step_cb, sm, NULL);
  	if (sm->eap)
  		eap_server_sm_deinit(sm->eap);
  
  	wpabuf_free(sm->radius_cui);
  	os_free(sm->identity);
  	os_free(sm);
  }
  
  
  static int eapol_sm_sta_entry_alive(struct eapol_authenticator *eapol,
  				    const u8 *addr)
  {
  	return eapol->cb.sta_entry_alive(eapol->conf.ctx, addr);
  }
  
  
  static void eapol_sm_step_run(struct eapol_state_machine *sm)
  {
  	struct eapol_authenticator *eapol = sm->eapol;
  	u8 addr[ETH_ALEN];
  	unsigned int prev_auth_pae, prev_be_auth, prev_reauth_timer,
  		prev_auth_key_tx, prev_key_rx, prev_ctrl_dir;
  	int max_steps = 100;
  
  	os_memcpy(addr, sm->addr, ETH_ALEN);
  
  	/*
  	 * Allow EAPOL state machines to run as long as there are state
  	 * changes, but exit and return here through event loop if more than
  	 * 100 steps is needed as a precaution against infinite loops inside
  	 * eloop callback.
  	 */
  restart:
  	prev_auth_pae = sm->auth_pae_state;
  	prev_be_auth = sm->be_auth_state;
  	prev_reauth_timer = sm->reauth_timer_state;
  	prev_auth_key_tx = sm->auth_key_tx_state;
  	prev_key_rx = sm->key_rx_state;
  	prev_ctrl_dir = sm->ctrl_dir_state;
  
  	SM_STEP_RUN(AUTH_PAE);
  	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
  		SM_STEP_RUN(BE_AUTH);
  	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
  		SM_STEP_RUN(REAUTH_TIMER);
  	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
  		SM_STEP_RUN(AUTH_KEY_TX);
  	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
  		SM_STEP_RUN(KEY_RX);
  	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
  		SM_STEP_RUN(CTRL_DIR);
  
  	if (prev_auth_pae != sm->auth_pae_state ||
  	    prev_be_auth != sm->be_auth_state ||
  	    prev_reauth_timer != sm->reauth_timer_state ||
  	    prev_auth_key_tx != sm->auth_key_tx_state ||
  	    prev_key_rx != sm->key_rx_state ||
  	    prev_ctrl_dir != sm->ctrl_dir_state) {
  		if (--max_steps > 0)
  			goto restart;
  		/* Re-run from eloop timeout */
  		eapol_auth_step(sm);
  		return;
  	}
  
  	if (eapol_sm_sta_entry_alive(eapol, addr) && sm->eap) {
  		if (eap_server_sm_step(sm->eap)) {
  			if (--max_steps > 0)
  				goto restart;
  			/* Re-run from eloop timeout */
  			eapol_auth_step(sm);
  			return;
  		}
  
  		/* TODO: find a better location for this */
  		if (sm->eap_if->aaaEapResp) {
  			sm->eap_if->aaaEapResp = FALSE;
  			if (sm->eap_if->aaaEapRespData == NULL) {
  				wpa_printf(MSG_DEBUG, "EAPOL: aaaEapResp set, "
  					   "but no aaaEapRespData available");
  				return;
  			}
  			sm->eapol->cb.aaa_send(
  				sm->eapol->conf.ctx, sm->sta,
  				wpabuf_head(sm->eap_if->aaaEapRespData),
  				wpabuf_len(sm->eap_if->aaaEapRespData));
  		}
  	}
  
  	if (eapol_sm_sta_entry_alive(eapol, addr))
  		sm->eapol->cb.eapol_event(sm->eapol->conf.ctx, sm->sta,
  					  EAPOL_AUTH_SM_CHANGE);
  }
  
  
  static void eapol_sm_step_cb(void *eloop_ctx, void *timeout_ctx)
  {
  	struct eapol_state_machine *sm = eloop_ctx;
  	eapol_sm_step_run(sm);
  }
  
  
  /**
   * eapol_auth_step - Advance EAPOL state machines
   * @sm: EAPOL state machine
   *
   * This function is called to advance EAPOL state machines after any change
   * that could affect their state.
   */
  void eapol_auth_step(struct eapol_state_machine *sm)
  {
  	/*
  	 * Run eapol_sm_step_run from a registered timeout to make sure that
  	 * other possible timeouts/events are processed and to avoid long
  	 * function call chains.
  	 */
  
  	eloop_register_timeout(0, 0, eapol_sm_step_cb, sm, NULL);
  }
  
  
  static void eapol_auth_initialize(struct eapol_state_machine *sm)
  {
  	sm->initializing = TRUE;
  	/* Initialize the state machines by asserting initialize and then
  	 * deasserting it after one step */
  	sm->initialize = TRUE;
  	eapol_sm_step_run(sm);
  	sm->initialize = FALSE;
  	eapol_sm_step_run(sm);
  	sm->initializing = FALSE;
  
  	/* Start one second tick for port timers state machine */
  	eloop_cancel_timeout(eapol_port_timers_tick, NULL, sm);
  	eloop_register_timeout(1, 0, eapol_port_timers_tick, NULL, sm);
  }
  
  
  static int eapol_sm_get_eap_user(void *ctx, const u8 *identity,
  				 size_t identity_len, int phase2,
  				 struct eap_user *user)
  {
  	struct eapol_state_machine *sm = ctx;
  	int ret;
  
  	ret = sm->eapol->cb.get_eap_user(sm->eapol->conf.ctx, identity,
  					 identity_len, phase2, user);
  	if (user->remediation)
  		sm->remediation = 1;
  	return ret;
  }
  
  
  static const char * eapol_sm_get_eap_req_id_text(void *ctx, size_t *len)
  {
  	struct eapol_state_machine *sm = ctx;
  	*len = sm->eapol->conf.eap_req_id_text_len;
  	return sm->eapol->conf.eap_req_id_text;
  }
  
  
  static int eapol_sm_get_erp_send_reauth_start(void *ctx)
  {
  	struct eapol_state_machine *sm = ctx;
  	return sm->eapol->conf.erp_send_reauth_start;
  }
  
  
  static const char * eapol_sm_get_erp_domain(void *ctx)
  {
  	struct eapol_state_machine *sm = ctx;
  	return sm->eapol->conf.erp_domain;
  }
  
  
  static struct eap_server_erp_key * eapol_sm_erp_get_key(void *ctx,
  							const char *keyname)
  {
  	struct eapol_state_machine *sm = ctx;
  	return sm->eapol->cb.erp_get_key(sm->eapol->conf.ctx, keyname);
  }
  
  
  static int eapol_sm_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
  {
  	struct eapol_state_machine *sm = ctx;
  	return sm->eapol->cb.erp_add_key(sm->eapol->conf.ctx, erp);
  }
  
  
  static const struct eapol_callbacks eapol_cb =
  {
  	eapol_sm_get_eap_user,
  	eapol_sm_get_eap_req_id_text,
  	NULL,
  	eapol_sm_get_erp_send_reauth_start,
  	eapol_sm_get_erp_domain,
  	eapol_sm_erp_get_key,
  	eapol_sm_erp_add_key,
  };
  
  
  int eapol_auth_eap_pending_cb(struct eapol_state_machine *sm, void *ctx)
  {
  	if (sm == NULL || ctx == NULL || ctx != sm->eap)
  		return -1;
  
  	eap_sm_pending_cb(sm->eap);
  	eapol_auth_step(sm);
  
  	return 0;
  }
  
  
  void eapol_auth_reauthenticate(struct eapol_state_machine *sm)
  {
  	wpa_printf(MSG_DEBUG, "EAPOL: External reauthentication trigger for "
  		   MACSTR, MAC2STR(sm->addr));
  	sm->reAuthenticate = TRUE;
  	eapol_auth_step(sm);
  }
  
  
  int eapol_auth_set_conf(struct eapol_state_machine *sm, const char *param,
  			const char *value)
  {
  	wpa_printf(MSG_DEBUG, "EAPOL: External configuration operation for "
  		   MACSTR " - param=%s value=%s",
  		   MAC2STR(sm->addr), param, value);
  
  	if (os_strcasecmp(param, "AdminControlledDirections") == 0) {
  		if (os_strcmp(value, "Both") == 0)
  			sm->adminControlledDirections = Both;
  		else if (os_strcmp(value, "In") == 0)
  			sm->adminControlledDirections = In;
  		else
  			return -1;
  		eapol_auth_step(sm);
  		return 0;
  	}
  
  	if (os_strcasecmp(param, "AdminControlledPortControl") == 0) {
  		if (os_strcmp(value, "ForceAuthorized") == 0)
  			sm->portControl = ForceAuthorized;
  		else if (os_strcmp(value, "ForceUnauthorized") == 0)
  			sm->portControl = ForceUnauthorized;
  		else if (os_strcmp(value, "Auto") == 0)
  			sm->portControl = Auto;
  		else
  			return -1;
  		eapol_auth_step(sm);
  		return 0;
  	}
  
  	if (os_strcasecmp(param, "quietPeriod") == 0) {
  		sm->quietPeriod = atoi(value);
  		return 0;
  	}
  
  	if (os_strcasecmp(param, "serverTimeout") == 0) {
  		sm->serverTimeout = atoi(value);
  		return 0;
  	}
  
  	if (os_strcasecmp(param, "reAuthPeriod") == 0) {
  		sm->reAuthPeriod = atoi(value);
  		return 0;
  	}
  
  	if (os_strcasecmp(param, "reAuthEnabled") == 0) {
  		if (os_strcmp(value, "TRUE") == 0)
  			sm->reAuthEnabled = TRUE;
  		else if (os_strcmp(value, "FALSE") == 0)
  			sm->reAuthEnabled = FALSE;
  		else
  			return -1;
  		eapol_auth_step(sm);
  		return 0;
  	}
  
  	if (os_strcasecmp(param, "KeyTransmissionEnabled") == 0) {
  		if (os_strcmp(value, "TRUE") == 0)
  			sm->keyTxEnabled = TRUE;
  		else if (os_strcmp(value, "FALSE") == 0)
  			sm->keyTxEnabled = FALSE;
  		else
  			return -1;
  		eapol_auth_step(sm);
  		return 0;
  	}
  
  	return -1;
  }
  
  
  static int eapol_auth_conf_clone(struct eapol_auth_config *dst,
  				 struct eapol_auth_config *src)
  {
  	dst->ctx = src->ctx;
  	dst->eap_reauth_period = src->eap_reauth_period;
  	dst->wpa = src->wpa;
  	dst->individual_wep_key_len = src->individual_wep_key_len;
  	dst->eap_server = src->eap_server;
  	dst->ssl_ctx = src->ssl_ctx;
  	dst->msg_ctx = src->msg_ctx;
  	dst->eap_sim_db_priv = src->eap_sim_db_priv;
  	os_free(dst->eap_req_id_text);
  	dst->pwd_group = src->pwd_group;
  	dst->pbc_in_m1 = src->pbc_in_m1;
  	dst->server_id = src->server_id;
  	dst->server_id_len = src->server_id_len;
  	if (src->eap_req_id_text) {
  		dst->eap_req_id_text = os_memdup(src->eap_req_id_text,
  						 src->eap_req_id_text_len);
  		if (dst->eap_req_id_text == NULL)
  			return -1;
  		dst->eap_req_id_text_len = src->eap_req_id_text_len;
  	} else {
  		dst->eap_req_id_text = NULL;
  		dst->eap_req_id_text_len = 0;
  	}
  	if (src->pac_opaque_encr_key) {
  		dst->pac_opaque_encr_key = os_memdup(src->pac_opaque_encr_key,
  						     16);
  		if (dst->pac_opaque_encr_key == NULL)
  			goto fail;
  	} else
  		dst->pac_opaque_encr_key = NULL;
  	if (src->eap_fast_a_id) {
  		dst->eap_fast_a_id = os_memdup(src->eap_fast_a_id,
  					       src->eap_fast_a_id_len);
  		if (dst->eap_fast_a_id == NULL)
  			goto fail;
  		dst->eap_fast_a_id_len = src->eap_fast_a_id_len;
  	} else
  		dst->eap_fast_a_id = NULL;
  	if (src->eap_fast_a_id_info) {
  		dst->eap_fast_a_id_info = os_strdup(src->eap_fast_a_id_info);
  		if (dst->eap_fast_a_id_info == NULL)
  			goto fail;
  	} else
  		dst->eap_fast_a_id_info = NULL;
  	dst->eap_fast_prov = src->eap_fast_prov;
  	dst->pac_key_lifetime = src->pac_key_lifetime;
  	dst->pac_key_refresh_time = src->pac_key_refresh_time;
  	dst->eap_teap_auth = src->eap_teap_auth;
  	dst->eap_teap_pac_no_inner = src->eap_teap_pac_no_inner;
  	dst->eap_sim_aka_result_ind = src->eap_sim_aka_result_ind;
  	dst->tnc = src->tnc;
  	dst->wps = src->wps;
  	dst->fragment_size = src->fragment_size;
  
  	os_free(dst->erp_domain);
  	if (src->erp_domain) {
  		dst->erp_domain = os_strdup(src->erp_domain);
  		if (dst->erp_domain == NULL)
  			goto fail;
  	} else {
  		dst->erp_domain = NULL;
  	}
  	dst->erp_send_reauth_start = src->erp_send_reauth_start;
  	dst->erp = src->erp;
  	dst->tls_session_lifetime = src->tls_session_lifetime;
  	dst->tls_flags = src->tls_flags;
  
  	return 0;
  
  fail:
  	eapol_auth_conf_free(dst);
  	return -1;
  }
  
  
  static void eapol_auth_conf_free(struct eapol_auth_config *conf)
  {
  	os_free(conf->eap_req_id_text);
  	conf->eap_req_id_text = NULL;
  	os_free(conf->pac_opaque_encr_key);
  	conf->pac_opaque_encr_key = NULL;
  	os_free(conf->eap_fast_a_id);
  	conf->eap_fast_a_id = NULL;
  	os_free(conf->eap_fast_a_id_info);
  	conf->eap_fast_a_id_info = NULL;
  	os_free(conf->erp_domain);
  	conf->erp_domain = NULL;
  }
  
  
  struct eapol_authenticator * eapol_auth_init(struct eapol_auth_config *conf,
  					     struct eapol_auth_cb *cb)
  {
  	struct eapol_authenticator *eapol;
  
  	eapol = os_zalloc(sizeof(*eapol));
  	if (eapol == NULL)
  		return NULL;
  
  	if (eapol_auth_conf_clone(&eapol->conf, conf) < 0) {
  		os_free(eapol);
  		return NULL;
  	}
  
  	if (conf->individual_wep_key_len > 0) {
  		/* use key0 in individual key and key1 in broadcast key */
  		eapol->default_wep_key_idx = 1;
  	}
  
  	eapol->cb.eapol_send = cb->eapol_send;
  	eapol->cb.aaa_send = cb->aaa_send;
  	eapol->cb.finished = cb->finished;
  	eapol->cb.get_eap_user = cb->get_eap_user;
  	eapol->cb.sta_entry_alive = cb->sta_entry_alive;
  	eapol->cb.logger = cb->logger;
  	eapol->cb.set_port_authorized = cb->set_port_authorized;
  	eapol->cb.abort_auth = cb->abort_auth;
  	eapol->cb.tx_key = cb->tx_key;
  	eapol->cb.eapol_event = cb->eapol_event;
  	eapol->cb.erp_get_key = cb->erp_get_key;
  	eapol->cb.erp_add_key = cb->erp_add_key;
  
  	return eapol;
  }
  
  
  void eapol_auth_deinit(struct eapol_authenticator *eapol)
  {
  	if (eapol == NULL)
  		return;
  
  	eapol_auth_conf_free(&eapol->conf);
  	os_free(eapol->default_wep_key);
  	os_free(eapol);
  }
  