eapol_sm.c

最新的Host AP 新添加了许多pcmcia 的驱动

	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->hapd, sm->sta,
				wpabuf_head(sm->eap_if->aaaEapRespData),
				wpabuf_len(sm->eap_if->aaaEapRespData));
		}
	}

	if (eapol_sm_sta_entry_alive(eapol, addr))
		wpa_auth_sm_notify(sm->sta->wpa_sm);
}


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);
}


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);
}


#ifdef HOSTAPD_DUMP_STATE
static inline const char * port_type_txt(PortTypes pt)
{
	switch (pt) {
	case ForceUnauthorized: return "ForceUnauthorized";
	case ForceAuthorized: return "ForceAuthorized";
	case Auto: return "Auto";
	default: return "Unknown";
	}
}


static inline const char * port_state_txt(PortState ps)
{
	switch (ps) {
	case Unauthorized: return "Unauthorized";
	case Authorized: return "Authorized";
	default: return "Unknown";
	}
}


static inline const char * ctrl_dir_txt(ControlledDirection dir)
{
	switch (dir) {
	case Both: return "Both";
	case In: return "In";
	default: return "Unknown";
	}
}


static inline const char * auth_pae_state_txt(int s)
{
	switch (s) {
	case AUTH_PAE_INITIALIZE: return "INITIALIZE";
	case AUTH_PAE_DISCONNECTED: return "DISCONNECTED";
	case AUTH_PAE_CONNECTING: return "CONNECTING";
	case AUTH_PAE_AUTHENTICATING: return "AUTHENTICATING";
	case AUTH_PAE_AUTHENTICATED: return "AUTHENTICATED";
	case AUTH_PAE_ABORTING: return "ABORTING";
	case AUTH_PAE_HELD: return "HELD";
	case AUTH_PAE_FORCE_AUTH: return "FORCE_AUTH";
	case AUTH_PAE_FORCE_UNAUTH: return "FORCE_UNAUTH";
	case AUTH_PAE_RESTART: return "RESTART";
	default: return "Unknown";
	}
}


static inline const char * be_auth_state_txt(int s)
{
	switch (s) {
	case BE_AUTH_REQUEST: return "REQUEST";
	case BE_AUTH_RESPONSE: return "RESPONSE";
	case BE_AUTH_SUCCESS: return "SUCCESS";
	case BE_AUTH_FAIL: return "FAIL";
	case BE_AUTH_TIMEOUT: return "TIMEOUT";
	case BE_AUTH_IDLE: return "IDLE";
	case BE_AUTH_INITIALIZE: return "INITIALIZE";
	case BE_AUTH_IGNORE: return "IGNORE";
	default: return "Unknown";
	}
}


static inline const char * reauth_timer_state_txt(int s)
{
	switch (s) {
	case REAUTH_TIMER_INITIALIZE: return "INITIALIZE";
	case REAUTH_TIMER_REAUTHENTICATE: return "REAUTHENTICATE";
	default: return "Unknown";
	}
}


static inline const char * auth_key_tx_state_txt(int s)
{
	switch (s) {
	case AUTH_KEY_TX_NO_KEY_TRANSMIT: return "NO_KEY_TRANSMIT";
	case AUTH_KEY_TX_KEY_TRANSMIT: return "KEY_TRANSMIT";
	default: return "Unknown";
	}
}


static inline const char * key_rx_state_txt(int s)
{
	switch (s) {
	case KEY_RX_NO_KEY_RECEIVE: return "NO_KEY_RECEIVE";
	case KEY_RX_KEY_RECEIVE: return "KEY_RECEIVE";
	default: return "Unknown";
	}
}


static inline const char * ctrl_dir_state_txt(int s)
{
	switch (s) {
	case CTRL_DIR_FORCE_BOTH: return "FORCE_BOTH";
	case CTRL_DIR_IN_OR_BOTH: return "IN_OR_BOTH";
	default: return "Unknown";
	}
}


void eapol_auth_dump_state(FILE *f, const char *prefix,
			   struct eapol_state_machine *sm)
{
	fprintf(f, "%sEAPOL state machine:\n", prefix);
	fprintf(f, "%s  aWhile=%d quietWhile=%d reAuthWhen=%d\n", prefix,
		sm->aWhile, sm->quietWhile, sm->reAuthWhen);
#define _SB(b) ((b) ? "TRUE" : "FALSE")
	fprintf(f,
		"%s  authAbort=%s authFail=%s authPortStatus=%s authStart=%s\n"
		"%s  authTimeout=%s authSuccess=%s eapFail=%s eapolEap=%s\n"
		"%s  eapSuccess=%s eapTimeout=%s initialize=%s "
		"keyAvailable=%s\n"
		"%s  keyDone=%s keyRun=%s keyTxEnabled=%s portControl=%s\n"
		"%s  portEnabled=%s portValid=%s reAuthenticate=%s\n",
		prefix, _SB(sm->authAbort), _SB(sm->authFail),
		port_state_txt(sm->authPortStatus), _SB(sm->authStart),
		prefix, _SB(sm->authTimeout), _SB(sm->authSuccess),
		_SB(sm->eap_if->eapFail), _SB(sm->eapolEap),
		prefix, _SB(sm->eap_if->eapSuccess),
		_SB(sm->eap_if->eapTimeout),
		_SB(sm->initialize), _SB(sm->eap_if->eapKeyAvailable),
		prefix, _SB(sm->keyDone), _SB(sm->keyRun),
		_SB(sm->keyTxEnabled), port_type_txt(sm->portControl),
		prefix, _SB(sm->eap_if->portEnabled), _SB(sm->portValid),
		_SB(sm->reAuthenticate));

	fprintf(f, "%s  Authenticator PAE:\n"
		"%s    state=%s\n"
		"%s    eapolLogoff=%s eapolStart=%s eapRestart=%s\n"
		"%s    portMode=%s reAuthCount=%d\n"
		"%s    quietPeriod=%d reAuthMax=%d\n"
		"%s    authEntersConnecting=%d\n"
		"%s    authEapLogoffsWhileConnecting=%d\n"
		"%s    authEntersAuthenticating=%d\n"
		"%s    authAuthSuccessesWhileAuthenticating=%d\n"
		"%s    authAuthTimeoutsWhileAuthenticating=%d\n"
		"%s    authAuthFailWhileAuthenticating=%d\n"
		"%s    authAuthEapStartsWhileAuthenticating=%d\n"
		"%s    authAuthEapLogoffWhileAuthenticating=%d\n"
		"%s    authAuthReauthsWhileAuthenticated=%d\n"
		"%s    authAuthEapStartsWhileAuthenticated=%d\n"
		"%s    authAuthEapLogoffWhileAuthenticated=%d\n",
		prefix, prefix, auth_pae_state_txt(sm->auth_pae_state), prefix,
		_SB(sm->eapolLogoff), _SB(sm->eapolStart),
		_SB(sm->eap_if->eapRestart),
		prefix, port_type_txt(sm->portMode), sm->reAuthCount,
		prefix, sm->quietPeriod, sm->reAuthMax,
		prefix, sm->authEntersConnecting,
		prefix, sm->authEapLogoffsWhileConnecting,
		prefix, sm->authEntersAuthenticating,
		prefix, sm->authAuthSuccessesWhileAuthenticating,
		prefix, sm->authAuthTimeoutsWhileAuthenticating,
		prefix, sm->authAuthFailWhileAuthenticating,
		prefix, sm->authAuthEapStartsWhileAuthenticating,
		prefix, sm->authAuthEapLogoffWhileAuthenticating,
		prefix, sm->authAuthReauthsWhileAuthenticated,
		prefix, sm->authAuthEapStartsWhileAuthenticated,
		prefix, sm->authAuthEapLogoffWhileAuthenticated);

	fprintf(f, "%s  Backend Authentication:\n"
		"%s    state=%s\n"
		"%s    eapNoReq=%s eapReq=%s eapResp=%s\n"
		"%s    serverTimeout=%d\n"
		"%s    backendResponses=%d\n"
		"%s    backendAccessChallenges=%d\n"
		"%s    backendOtherRequestsToSupplicant=%d\n"
		"%s    backendAuthSuccesses=%d\n"
		"%s    backendAuthFails=%d\n",
		prefix, prefix,
		be_auth_state_txt(sm->be_auth_state),
		prefix, _SB(sm->eap_if->eapNoReq), _SB(sm->eap_if->eapReq),
		_SB(sm->eap_if->eapResp),
		prefix, sm->serverTimeout,
		prefix, sm->backendResponses,
		prefix, sm->backendAccessChallenges,
		prefix, sm->backendOtherRequestsToSupplicant,
		prefix, sm->backendAuthSuccesses,
		prefix, sm->backendAuthFails);

	fprintf(f, "%s  Reauthentication Timer:\n"
		"%s    state=%s\n"
		"%s    reAuthPeriod=%d reAuthEnabled=%s\n", prefix, prefix,
		reauth_timer_state_txt(sm->reauth_timer_state), prefix,
		sm->reAuthPeriod, _SB(sm->reAuthEnabled));

	fprintf(f, "%s  Authenticator Key Transmit:\n"
		"%s    state=%s\n", prefix, prefix,
		auth_key_tx_state_txt(sm->auth_key_tx_state));

	fprintf(f, "%s  Key Receive:\n"
		"%s    state=%s\n"
		"%s    rxKey=%s\n", prefix, prefix,
		key_rx_state_txt(sm->key_rx_state), prefix, _SB(sm->rxKey));

	fprintf(f, "%s  Controlled Directions:\n"
		"%s    state=%s\n"
		"%s    adminControlledDirections=%s "
		"operControlledDirections=%s\n"
		"%s    operEdge=%s\n", prefix, prefix,
		ctrl_dir_state_txt(sm->ctrl_dir_state),
		prefix, ctrl_dir_txt(sm->adminControlledDirections),
		ctrl_dir_txt(sm->operControlledDirections),
		prefix, _SB(sm->operEdge));
#undef _SB
}
#endif /* HOSTAPD_DUMP_STATE */


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;
	return sm->eapol->cb.get_eap_user(sm->hapd, identity, identity_len,
					  phase2, user);
}


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 struct eapol_callbacks eapol_cb =
{
	.get_eap_user = eapol_sm_get_eap_user,
	.get_eap_req_id_text = eapol_sm_get_eap_req_id_text,
};


int eapol_auth_eap_pending_cb(struct eapol_state_machine *sm, void *ctx)
{
	if (sm == NULL || ctx != sm->eap)
		return -1;

	eap_sm_pending_cb(sm->eap);
	eapol_auth_step(sm);

	return 0;
}


static int eapol_auth_conf_clone(struct eapol_auth_config *dst,
				 struct eapol_auth_config *src)
{
	dst->hapd = src->hapd;
	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->eap_sim_db_priv = src->eap_sim_db_priv;
	os_free(dst->eap_req_id_text);
	if (src->eap_req_id_text) {
		dst->eap_req_id_text = os_malloc(src->eap_req_id_text_len);
		if (dst->eap_req_id_text == NULL)
			return -1;
		os_memcpy(dst->eap_req_id_text, src->eap_req_id_text,
			  src->eap_req_id_text_len);
		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_malloc(16);
		os_memcpy(dst->pac_opaque_encr_key, src->pac_opaque_encr_key,
			  16);
	} else
		dst->pac_opaque_encr_key = NULL;
	if (src->eap_fast_a_id) {
		dst->eap_fast_a_id = os_malloc(src->eap_fast_a_id_len);
		if (dst->eap_fast_a_id == NULL) {
			os_free(dst->eap_req_id_text);
			return -1;
		}
		os_memcpy(dst->eap_fast_a_id, src->eap_fast_a_id,
			  src->eap_fast_a_id_len);
		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) {
			os_free(dst->eap_req_id_text);
			os_free(dst->eap_fast_a_id);
			return -1;
		}
	} 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_sim_aka_result_ind = src->eap_sim_aka_result_ind;
	dst->tnc = src->tnc;
	dst->wps = src->wps;
	return 0;
}


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;
}


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;
	}

	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;

	return eapol;
}


void eapol_auth_deinit(struct eapol_authenticator *eapol)
{
	if (eapol == NULL)
		return;

	eapol_auth_conf_free(&eapol->conf);
	os_free(eapol);
}