+++ /dev/null
-/*
- * IEEE 802.1X-2004 Authenticator - EAPOL state machine
- * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING 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 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_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;
-}
-
-
-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_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_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_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)
-{
- 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_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;
- 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);
-
- 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);
- 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;
- return sm->eapol->cb.get_eap_user(sm->eapol->conf.ctx, 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 =
-{
- eapol_sm_get_eap_user,
- 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->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;
- 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;
- dst->fragment_size = src->fragment_size;
- 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;
- }
-
- 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;
-
- 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);
-}
projects / mech_eap.git / blobdiff