8637a9a96a
Approved by: re (dwhite)
1194 lines
30 KiB
C
1194 lines
30 KiB
C
/*
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* Host AP (software wireless LAN access point) user space daemon for
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* Host AP kernel driver / IEEE 802.1X Authenticator - EAPOL state machine
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* Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*
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* $FreeBSD$
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <sys/socket.h>
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#include "hostapd.h"
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#include "ieee802_1x.h"
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#include "eapol_sm.h"
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#include "eloop.h"
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#include "wpa.h"
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#include "sta_info.h"
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#include "eap.h"
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static struct eapol_callbacks eapol_cb;
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/* EAPOL state machines are described in IEEE Std 802.1X-REV-d11, Chap. 8.2 */
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#define setPortAuthorized() \
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ieee802_1x_set_sta_authorized(sm->hapd, sm->sta, 1)
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#define setPortUnauthorized() \
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ieee802_1x_set_sta_authorized(sm->hapd, sm->sta, 0)
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/* procedures */
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#define txCannedFail() ieee802_1x_tx_canned_eap(sm->hapd, sm->sta, 0)
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#define txCannedSuccess() ieee802_1x_tx_canned_eap(sm->hapd, sm->sta, 1)
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#define txReq() ieee802_1x_tx_req(sm->hapd, sm->sta)
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#define sendRespToServer() ieee802_1x_send_resp_to_server(sm->hapd, sm->sta)
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#define abortAuth() ieee802_1x_abort_auth(sm->hapd, sm->sta)
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#define txKey() ieee802_1x_tx_key(sm->hapd, sm->sta)
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#define processKey() do { } while (0)
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/* Definitions for clarifying state machine implementation */
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#define SM_STATE(machine, state) \
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static void sm_ ## machine ## _ ## state ## _Enter(struct eapol_state_machine \
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*sm)
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#define SM_ENTRY(machine, _state, _data) \
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sm->_data.state = machine ## _ ## _state; \
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if (sm->hapd->conf->debug >= HOSTAPD_DEBUG_MINIMAL) \
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printf("IEEE 802.1X: " MACSTR " " #machine " entering state " #_state \
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"\n", MAC2STR(sm->addr));
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#define SM_ENTER(machine, state) sm_ ## machine ## _ ## state ## _Enter(sm)
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#define SM_STEP(machine) \
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static void sm_ ## machine ## _Step(struct eapol_state_machine *sm)
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#define SM_STEP_RUN(machine) sm_ ## machine ## _Step(sm)
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/* Port Timers state machine - implemented as a function that will be called
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* once a second as a registered event loop timeout */
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static void eapol_port_timers_tick(void *eloop_ctx, void *timeout_ctx)
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{
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struct eapol_state_machine *state = timeout_ctx;
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if (state->aWhile > 0)
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state->aWhile--;
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if (state->quietWhile > 0)
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state->quietWhile--;
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if (state->reAuthWhen > 0)
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state->reAuthWhen--;
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if (state->hapd->conf->debug >= HOSTAPD_DEBUG_MSGDUMPS)
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printf("IEEE 802.1X: " MACSTR " Port Timers TICK "
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"(timers: %d %d %d)\n", MAC2STR(state->addr),
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state->aWhile, state->quietWhile, state->reAuthWhen);
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eapol_sm_step(state);
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eloop_register_timeout(1, 0, eapol_port_timers_tick, eloop_ctx, state);
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}
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/* Authenticator PAE state machine */
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SM_STATE(AUTH_PAE, INITIALIZE)
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{
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SM_ENTRY(AUTH_PAE, INITIALIZE, auth_pae);
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sm->auth_pae.portMode = Auto;
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sm->currentId = 255;
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}
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SM_STATE(AUTH_PAE, DISCONNECTED)
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{
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int from_initialize = sm->auth_pae.state == AUTH_PAE_INITIALIZE;
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if (sm->auth_pae.eapolLogoff) {
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if (sm->auth_pae.state == AUTH_PAE_CONNECTING)
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sm->auth_pae.authEapLogoffsWhileConnecting++;
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else if (sm->auth_pae.state == AUTH_PAE_AUTHENTICATED)
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sm->auth_pae.authAuthEapLogoffWhileAuthenticated++;
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}
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SM_ENTRY(AUTH_PAE, DISCONNECTED, auth_pae);
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sm->authPortStatus = Unauthorized;
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setPortUnauthorized();
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sm->auth_pae.reAuthCount = 0;
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sm->auth_pae.eapolLogoff = FALSE;
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if (!from_initialize) {
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if (sm->flags & EAPOL_SM_PREAUTH)
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rsn_preauth_finished(sm->hapd, sm->sta, 0);
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else
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ieee802_1x_finished(sm->hapd, sm->sta, 0);
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}
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}
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SM_STATE(AUTH_PAE, RESTART)
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{
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if (sm->auth_pae.state == AUTH_PAE_AUTHENTICATED) {
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if (sm->reAuthenticate)
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sm->auth_pae.authAuthReauthsWhileAuthenticated++;
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if (sm->auth_pae.eapolStart)
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sm->auth_pae.authAuthEapStartsWhileAuthenticated++;
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if (sm->auth_pae.eapolLogoff)
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sm->auth_pae.authAuthEapLogoffWhileAuthenticated++;
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}
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SM_ENTRY(AUTH_PAE, RESTART, auth_pae);
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sm->auth_pae.eapRestart = TRUE;
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ieee802_1x_request_identity(sm->hapd, sm->sta);
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}
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SM_STATE(AUTH_PAE, CONNECTING)
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{
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if (sm->auth_pae.state != AUTH_PAE_CONNECTING)
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sm->auth_pae.authEntersConnecting++;
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SM_ENTRY(AUTH_PAE, CONNECTING, auth_pae);
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sm->reAuthenticate = FALSE;
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sm->auth_pae.reAuthCount++;
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}
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SM_STATE(AUTH_PAE, HELD)
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{
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if (sm->auth_pae.state == AUTH_PAE_AUTHENTICATING && sm->authFail)
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sm->auth_pae.authAuthFailWhileAuthenticating++;
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SM_ENTRY(AUTH_PAE, HELD, auth_pae);
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sm->authPortStatus = Unauthorized;
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setPortUnauthorized();
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sm->quietWhile = sm->auth_pae.quietPeriod;
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sm->auth_pae.eapolLogoff = FALSE;
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hostapd_logger(sm->hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
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HOSTAPD_LEVEL_WARNING, "authentication failed");
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if (sm->flags & EAPOL_SM_PREAUTH)
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rsn_preauth_finished(sm->hapd, sm->sta, 0);
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else
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ieee802_1x_finished(sm->hapd, sm->sta, 0);
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}
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SM_STATE(AUTH_PAE, AUTHENTICATED)
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{
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if (sm->auth_pae.state == AUTH_PAE_AUTHENTICATING && sm->authSuccess)
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sm->auth_pae.authAuthSuccessesWhileAuthenticating++;
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SM_ENTRY(AUTH_PAE, AUTHENTICATED, auth_pae);
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sm->authPortStatus = Authorized;
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setPortAuthorized();
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sm->auth_pae.reAuthCount = 0;
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hostapd_logger(sm->hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
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HOSTAPD_LEVEL_INFO, "authenticated");
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if (sm->flags & EAPOL_SM_PREAUTH)
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rsn_preauth_finished(sm->hapd, sm->sta, 1);
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else
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ieee802_1x_finished(sm->hapd, sm->sta, 1);
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}
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SM_STATE(AUTH_PAE, AUTHENTICATING)
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{
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if (sm->auth_pae.state == AUTH_PAE_CONNECTING && sm->rx_identity) {
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sm->auth_pae.authEntersAuthenticating++;
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sm->rx_identity = FALSE;
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}
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SM_ENTRY(AUTH_PAE, AUTHENTICATING, auth_pae);
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sm->auth_pae.eapolStart = FALSE;
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sm->authSuccess = FALSE;
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sm->authFail = FALSE;
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sm->authTimeout = FALSE;
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sm->authStart = TRUE;
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sm->keyRun = FALSE;
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sm->keyDone = FALSE;
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}
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SM_STATE(AUTH_PAE, ABORTING)
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{
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if (sm->auth_pae.state == AUTH_PAE_AUTHENTICATING) {
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if (sm->authTimeout)
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sm->auth_pae.authAuthTimeoutsWhileAuthenticating++;
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if (sm->auth_pae.eapolStart)
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sm->auth_pae.authAuthEapStartsWhileAuthenticating++;
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if (sm->auth_pae.eapolLogoff)
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sm->auth_pae.authAuthEapLogoffWhileAuthenticating++;
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}
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SM_ENTRY(AUTH_PAE, ABORTING, auth_pae);
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sm->authAbort = TRUE;
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sm->keyRun = FALSE;
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sm->keyDone = FALSE;
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}
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SM_STATE(AUTH_PAE, FORCE_AUTH)
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{
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SM_ENTRY(AUTH_PAE, FORCE_AUTH, auth_pae);
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sm->authPortStatus = Authorized;
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setPortAuthorized();
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sm->auth_pae.portMode = ForceAuthorized;
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sm->auth_pae.eapolStart = FALSE;
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txCannedSuccess();
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}
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SM_STATE(AUTH_PAE, FORCE_UNAUTH)
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{
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SM_ENTRY(AUTH_PAE, FORCE_UNAUTH, auth_pae);
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sm->authPortStatus = Unauthorized;
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setPortUnauthorized();
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sm->auth_pae.portMode = ForceUnauthorized;
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sm->auth_pae.eapolStart = FALSE;
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txCannedFail();
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}
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SM_STEP(AUTH_PAE)
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{
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if ((sm->portControl == Auto &&
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sm->auth_pae.portMode != sm->portControl) ||
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sm->initialize || !sm->portEnabled)
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SM_ENTER(AUTH_PAE, INITIALIZE);
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else if (sm->portControl == ForceAuthorized &&
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sm->auth_pae.portMode != sm->portControl &&
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!(sm->initialize || !sm->portEnabled))
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SM_ENTER(AUTH_PAE, FORCE_AUTH);
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else if (sm->portControl == ForceUnauthorized &&
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sm->auth_pae.portMode != sm->portControl &&
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!(sm->initialize || !sm->portEnabled))
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SM_ENTER(AUTH_PAE, FORCE_UNAUTH);
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else {
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switch (sm->auth_pae.state) {
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case AUTH_PAE_INITIALIZE:
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SM_ENTER(AUTH_PAE, DISCONNECTED);
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break;
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case AUTH_PAE_DISCONNECTED:
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SM_ENTER(AUTH_PAE, RESTART);
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break;
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case AUTH_PAE_RESTART:
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if (!sm->auth_pae.eapRestart)
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SM_ENTER(AUTH_PAE, CONNECTING);
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break;
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case AUTH_PAE_HELD:
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if (sm->quietWhile == 0)
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SM_ENTER(AUTH_PAE, RESTART);
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break;
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case AUTH_PAE_CONNECTING:
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if (sm->auth_pae.eapolLogoff ||
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sm->auth_pae.reAuthCount > sm->auth_pae.reAuthMax)
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SM_ENTER(AUTH_PAE, DISCONNECTED);
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else if ((sm->be_auth.eapReq &&
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sm->auth_pae.reAuthCount <=
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sm->auth_pae.reAuthMax) ||
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sm->eapSuccess || sm->eapFail)
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SM_ENTER(AUTH_PAE, AUTHENTICATING);
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break;
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case AUTH_PAE_AUTHENTICATED:
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if (sm->auth_pae.eapolStart || sm->reAuthenticate)
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SM_ENTER(AUTH_PAE, RESTART);
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else if (sm->auth_pae.eapolLogoff || !sm->portValid)
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SM_ENTER(AUTH_PAE, DISCONNECTED);
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break;
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case AUTH_PAE_AUTHENTICATING:
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if (sm->authSuccess && sm->portValid)
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SM_ENTER(AUTH_PAE, AUTHENTICATED);
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else if (sm->authFail ||
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(sm->keyDone && !sm->portValid))
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SM_ENTER(AUTH_PAE, HELD);
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else if (sm->auth_pae.eapolStart ||
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sm->auth_pae.eapolLogoff || sm->authTimeout)
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SM_ENTER(AUTH_PAE, ABORTING);
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break;
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case AUTH_PAE_ABORTING:
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if (sm->auth_pae.eapolLogoff && !sm->authAbort)
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SM_ENTER(AUTH_PAE, DISCONNECTED);
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else if (!sm->auth_pae.eapolLogoff && !sm->authAbort)
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SM_ENTER(AUTH_PAE, RESTART);
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break;
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case AUTH_PAE_FORCE_AUTH:
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if (sm->auth_pae.eapolStart)
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SM_ENTER(AUTH_PAE, FORCE_AUTH);
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break;
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case AUTH_PAE_FORCE_UNAUTH:
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if (sm->auth_pae.eapolStart)
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SM_ENTER(AUTH_PAE, FORCE_UNAUTH);
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break;
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}
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}
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}
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/* Backend Authentication state machine */
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SM_STATE(BE_AUTH, INITIALIZE)
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{
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SM_ENTRY(BE_AUTH, INITIALIZE, be_auth);
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abortAuth();
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sm->be_auth.eapNoReq = FALSE;
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sm->authAbort = FALSE;
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}
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SM_STATE(BE_AUTH, REQUEST)
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{
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SM_ENTRY(BE_AUTH, REQUEST, be_auth);
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txReq();
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sm->be_auth.eapReq = FALSE;
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sm->be_auth.backendOtherRequestsToSupplicant++;
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}
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SM_STATE(BE_AUTH, RESPONSE)
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{
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SM_ENTRY(BE_AUTH, RESPONSE, be_auth);
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sm->authTimeout = FALSE;
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sm->eapolEap = FALSE;
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sm->be_auth.eapNoReq = FALSE;
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sm->aWhile = sm->be_auth.serverTimeout;
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sm->be_auth.eapResp = TRUE;
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sendRespToServer();
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sm->be_auth.backendResponses++;
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}
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SM_STATE(BE_AUTH, SUCCESS)
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{
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SM_ENTRY(BE_AUTH, SUCCESS, be_auth);
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txReq();
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sm->authSuccess = TRUE;
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sm->keyRun = TRUE;
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}
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SM_STATE(BE_AUTH, FAIL)
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{
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SM_ENTRY(BE_AUTH, FAIL, be_auth);
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/* Note: IEEE 802.1X-REV-d11 has unconditional txReq() here.
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* txCannelFail() is used as a workaround for the case where
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* authentication server does not include EAP-Message with
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* Access-Reject. */
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if (sm->last_eap_radius == NULL)
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txCannedFail();
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else
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txReq();
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sm->authFail = TRUE;
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}
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SM_STATE(BE_AUTH, TIMEOUT)
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{
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SM_ENTRY(BE_AUTH, TIMEOUT, be_auth);
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sm->authTimeout = TRUE;
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}
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SM_STATE(BE_AUTH, IDLE)
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{
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SM_ENTRY(BE_AUTH, IDLE, be_auth);
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sm->authStart = FALSE;
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}
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SM_STATE(BE_AUTH, IGNORE)
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{
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SM_ENTRY(BE_AUTH, IGNORE, be_auth);
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sm->be_auth.eapNoReq = FALSE;
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}
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SM_STEP(BE_AUTH)
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{
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if (sm->portControl != Auto || sm->initialize || sm->authAbort) {
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SM_ENTER(BE_AUTH, INITIALIZE);
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return;
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}
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switch (sm->be_auth.state) {
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case BE_AUTH_INITIALIZE:
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SM_ENTER(BE_AUTH, IDLE);
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break;
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case BE_AUTH_REQUEST:
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if (sm->eapolEap)
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SM_ENTER(BE_AUTH, RESPONSE);
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else if (sm->be_auth.eapReq)
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SM_ENTER(BE_AUTH, REQUEST);
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else if (sm->eapTimeout)
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SM_ENTER(BE_AUTH, TIMEOUT);
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break;
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case BE_AUTH_RESPONSE:
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if (sm->be_auth.eapNoReq)
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SM_ENTER(BE_AUTH, IGNORE);
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if (sm->be_auth.eapReq) {
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sm->be_auth.backendAccessChallenges++;
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SM_ENTER(BE_AUTH, REQUEST);
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} else if (sm->aWhile == 0)
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SM_ENTER(BE_AUTH, TIMEOUT);
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else if (sm->eapFail) {
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sm->be_auth.backendAuthFails++;
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SM_ENTER(BE_AUTH, FAIL);
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} else if (sm->eapSuccess) {
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sm->be_auth.backendAuthSuccesses++;
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SM_ENTER(BE_AUTH, SUCCESS);
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}
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break;
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case BE_AUTH_SUCCESS:
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SM_ENTER(BE_AUTH, IDLE);
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break;
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case BE_AUTH_FAIL:
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SM_ENTER(BE_AUTH, IDLE);
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break;
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case BE_AUTH_TIMEOUT:
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SM_ENTER(BE_AUTH, IDLE);
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break;
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case BE_AUTH_IDLE:
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if (sm->eapFail && sm->authStart)
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SM_ENTER(BE_AUTH, FAIL);
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else if (sm->be_auth.eapReq && sm->authStart)
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SM_ENTER(BE_AUTH, REQUEST);
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else if (sm->eapSuccess && sm->authStart)
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SM_ENTER(BE_AUTH, SUCCESS);
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break;
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case BE_AUTH_IGNORE:
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if (sm->eapolEap)
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SM_ENTER(BE_AUTH, RESPONSE);
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else if (sm->be_auth.eapReq)
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SM_ENTER(BE_AUTH, REQUEST);
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else if (sm->eapTimeout)
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SM_ENTER(BE_AUTH, TIMEOUT);
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break;
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}
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}
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/* Reauthentication Timer state machine */
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SM_STATE(REAUTH_TIMER, INITIALIZE)
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{
|
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SM_ENTRY(REAUTH_TIMER, INITIALIZE, reauth_timer);
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|
|
|
sm->reAuthWhen = sm->reauth_timer.reAuthPeriod;
|
|
}
|
|
|
|
|
|
SM_STATE(REAUTH_TIMER, REAUTHENTICATE)
|
|
{
|
|
SM_ENTRY(REAUTH_TIMER, REAUTHENTICATE, reauth_timer);
|
|
|
|
sm->reAuthenticate = TRUE;
|
|
wpa_sm_event(sm->hapd, sm->sta, WPA_REAUTH_EAPOL);
|
|
}
|
|
|
|
|
|
SM_STEP(REAUTH_TIMER)
|
|
{
|
|
if (sm->portControl != Auto || sm->initialize ||
|
|
sm->authPortStatus == Unauthorized ||
|
|
!sm->reauth_timer.reAuthEnabled) {
|
|
SM_ENTER(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(AUTH_KEY_TX, NO_KEY_TRANSMIT, auth_key_tx);
|
|
}
|
|
|
|
|
|
SM_STATE(AUTH_KEY_TX, KEY_TRANSMIT)
|
|
{
|
|
SM_ENTRY(AUTH_KEY_TX, KEY_TRANSMIT, auth_key_tx);
|
|
|
|
txKey();
|
|
sm->keyAvailable = FALSE;
|
|
sm->keyDone = TRUE;
|
|
}
|
|
|
|
|
|
SM_STEP(AUTH_KEY_TX)
|
|
{
|
|
if (sm->initialize || sm->portControl != Auto) {
|
|
SM_ENTER(AUTH_KEY_TX, NO_KEY_TRANSMIT);
|
|
return;
|
|
}
|
|
|
|
switch (sm->auth_key_tx.state) {
|
|
case AUTH_KEY_TX_NO_KEY_TRANSMIT:
|
|
if (sm->keyTxEnabled && sm->keyAvailable && sm->keyRun &&
|
|
!sm->sta->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->keyAvailable)
|
|
SM_ENTER(AUTH_KEY_TX, KEY_TRANSMIT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* Key Receive state machine */
|
|
|
|
SM_STATE(KEY_RX, NO_KEY_RECEIVE)
|
|
{
|
|
SM_ENTRY(KEY_RX, NO_KEY_RECEIVE, key_rx);
|
|
}
|
|
|
|
|
|
SM_STATE(KEY_RX, KEY_RECEIVE)
|
|
{
|
|
SM_ENTRY(KEY_RX, KEY_RECEIVE, key_rx);
|
|
|
|
processKey();
|
|
sm->key_rx.rxKey = FALSE;
|
|
}
|
|
|
|
|
|
SM_STEP(KEY_RX)
|
|
{
|
|
if (sm->initialize || !sm->portEnabled) {
|
|
SM_ENTER(KEY_RX, NO_KEY_RECEIVE);
|
|
return;
|
|
}
|
|
|
|
switch (sm->key_rx.state) {
|
|
case KEY_RX_NO_KEY_RECEIVE:
|
|
if (sm->key_rx.rxKey)
|
|
SM_ENTER(KEY_RX, KEY_RECEIVE);
|
|
break;
|
|
case KEY_RX_KEY_RECEIVE:
|
|
if (sm->key_rx.rxKey)
|
|
SM_ENTER(KEY_RX, KEY_RECEIVE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* Controlled Directions state machine */
|
|
|
|
SM_STATE(CTRL_DIR, FORCE_BOTH)
|
|
{
|
|
SM_ENTRY(CTRL_DIR, FORCE_BOTH, ctrl_dir);
|
|
sm->ctrl_dir.operControlledDirections = Both;
|
|
}
|
|
|
|
|
|
SM_STATE(CTRL_DIR, IN_OR_BOTH)
|
|
{
|
|
SM_ENTRY(CTRL_DIR, IN_OR_BOTH, ctrl_dir);
|
|
sm->ctrl_dir.operControlledDirections =
|
|
sm->ctrl_dir.adminControlledDirections;
|
|
}
|
|
|
|
|
|
SM_STEP(CTRL_DIR)
|
|
{
|
|
if (sm->initialize) {
|
|
SM_ENTER(CTRL_DIR, IN_OR_BOTH);
|
|
return;
|
|
}
|
|
|
|
switch (sm->ctrl_dir.state) {
|
|
case CTRL_DIR_FORCE_BOTH:
|
|
if (sm->portEnabled && sm->ctrl_dir.operEdge)
|
|
SM_ENTER(CTRL_DIR, IN_OR_BOTH);
|
|
break;
|
|
case CTRL_DIR_IN_OR_BOTH:
|
|
if (sm->ctrl_dir.operControlledDirections !=
|
|
sm->ctrl_dir.adminControlledDirections)
|
|
SM_ENTER(CTRL_DIR, IN_OR_BOTH);
|
|
if (!sm->portEnabled || !sm->ctrl_dir.operEdge)
|
|
SM_ENTER(CTRL_DIR, FORCE_BOTH);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
struct eapol_state_machine *
|
|
eapol_sm_alloc(hostapd *hapd, struct sta_info *sta)
|
|
{
|
|
struct eapol_state_machine *sm;
|
|
|
|
sm = (struct eapol_state_machine *) malloc(sizeof(*sm));
|
|
if (sm == NULL) {
|
|
printf("IEEE 802.1X port state allocation failed\n");
|
|
return NULL;
|
|
}
|
|
memset(sm, 0, sizeof(*sm));
|
|
sm->radius_identifier = -1;
|
|
memcpy(sm->addr, sta->addr, ETH_ALEN);
|
|
if (sta->flags & WLAN_STA_PREAUTH)
|
|
sm->flags |= EAPOL_SM_PREAUTH;
|
|
|
|
sm->hapd = hapd;
|
|
sm->sta = sta;
|
|
|
|
/* Set default values for state machine constants */
|
|
sm->auth_pae.state = AUTH_PAE_INITIALIZE;
|
|
sm->auth_pae.quietPeriod = AUTH_PAE_DEFAULT_quietPeriod;
|
|
sm->auth_pae.reAuthMax = AUTH_PAE_DEFAULT_reAuthMax;
|
|
|
|
sm->be_auth.state = BE_AUTH_INITIALIZE;
|
|
sm->be_auth.serverTimeout = BE_AUTH_DEFAULT_serverTimeout;
|
|
|
|
sm->reauth_timer.state = REAUTH_TIMER_INITIALIZE;
|
|
sm->reauth_timer.reAuthPeriod = hapd->conf->eap_reauth_period;
|
|
sm->reauth_timer.reAuthEnabled = hapd->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->portEnabled = FALSE;
|
|
sm->portControl = Auto;
|
|
|
|
sm->keyAvailable = FALSE;
|
|
if (!hapd->conf->wpa &&
|
|
(hapd->default_wep_key || hapd->conf->individual_wep_key_len > 0))
|
|
sm->keyTxEnabled = TRUE;
|
|
else
|
|
sm->keyTxEnabled = FALSE;
|
|
if (hapd->conf->wpa)
|
|
sm->portValid = FALSE;
|
|
else
|
|
sm->portValid = TRUE;
|
|
|
|
if (hapd->conf->eap_authenticator) {
|
|
struct eap_config eap_conf;
|
|
memset(&eap_conf, 0, sizeof(eap_conf));
|
|
eap_conf.ssl_ctx = hapd->ssl_ctx;
|
|
eap_conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
|
|
sm->eap = eap_sm_init(sm, &eapol_cb, &eap_conf);
|
|
if (sm->eap == NULL) {
|
|
eapol_sm_free(sm);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
eapol_sm_initialize(sm);
|
|
|
|
return sm;
|
|
}
|
|
|
|
|
|
void eapol_sm_free(struct eapol_state_machine *sm)
|
|
{
|
|
if (sm == NULL)
|
|
return;
|
|
|
|
eloop_cancel_timeout(eapol_port_timers_tick, sm->hapd, sm);
|
|
if (sm->eap)
|
|
eap_sm_deinit(sm->eap);
|
|
free(sm);
|
|
}
|
|
|
|
|
|
static int eapol_sm_sta_entry_alive(struct hostapd_data *hapd, u8 *addr)
|
|
{
|
|
struct sta_info *sta;
|
|
sta = ap_get_sta(hapd, addr);
|
|
if (sta == NULL || sta->eapol_sm == NULL)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
void eapol_sm_step(struct eapol_state_machine *sm)
|
|
{
|
|
struct hostapd_data *hapd = sm->hapd;
|
|
u8 addr[ETH_ALEN];
|
|
int prev_auth_pae, prev_be_auth, prev_reauth_timer, prev_auth_key_tx,
|
|
prev_key_rx, prev_ctrl_dir;
|
|
|
|
/* FIX: could re-run eapol_sm_step from registered timeout (after
|
|
* 0 sec) to make sure that other possible timeouts/events are
|
|
* processed */
|
|
|
|
memcpy(addr, sm->sta->addr, ETH_ALEN);
|
|
restart:
|
|
do {
|
|
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(hapd, addr))
|
|
break;
|
|
SM_STEP_RUN(BE_AUTH);
|
|
if (!sm->initializing && !eapol_sm_sta_entry_alive(hapd, addr))
|
|
break;
|
|
SM_STEP_RUN(REAUTH_TIMER);
|
|
if (!sm->initializing && !eapol_sm_sta_entry_alive(hapd, addr))
|
|
break;
|
|
SM_STEP_RUN(AUTH_KEY_TX);
|
|
if (!sm->initializing && !eapol_sm_sta_entry_alive(hapd, addr))
|
|
break;
|
|
SM_STEP_RUN(KEY_RX);
|
|
if (!sm->initializing && !eapol_sm_sta_entry_alive(hapd, addr))
|
|
break;
|
|
SM_STEP_RUN(CTRL_DIR);
|
|
if (!sm->initializing && !eapol_sm_sta_entry_alive(hapd, addr))
|
|
break;
|
|
} while (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 (eapol_sm_sta_entry_alive(hapd, addr) && sm->eap) {
|
|
if (eap_sm_step(sm->eap))
|
|
goto restart;
|
|
}
|
|
|
|
if (eapol_sm_sta_entry_alive(hapd, addr))
|
|
wpa_sm_notify(sm->hapd, sm->sta);
|
|
}
|
|
|
|
|
|
void eapol_sm_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(sm);
|
|
sm->initialize = FALSE;
|
|
eapol_sm_step(sm);
|
|
sm->initializing = FALSE;
|
|
|
|
/* Start one second tick for port timers state machine */
|
|
eloop_cancel_timeout(eapol_port_timers_tick, sm->hapd, sm);
|
|
eloop_register_timeout(1, 0, eapol_port_timers_tick, sm->hapd, 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_sm_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->eapFail), _SB(sm->eapolEap),
|
|
prefix, _SB(sm->eapSuccess), _SB(sm->eapTimeout),
|
|
_SB(sm->initialize), _SB(sm->keyAvailable),
|
|
prefix, _SB(sm->keyDone), _SB(sm->keyRun),
|
|
_SB(sm->keyTxEnabled), port_type_txt(sm->portControl),
|
|
prefix, _SB(sm->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->auth_pae.eapolLogoff), _SB(sm->auth_pae.eapolStart),
|
|
_SB(sm->auth_pae.eapRestart), prefix,
|
|
port_type_txt(sm->auth_pae.portMode), sm->auth_pae.reAuthCount,
|
|
prefix, sm->auth_pae.quietPeriod, sm->auth_pae.reAuthMax,
|
|
prefix, sm->auth_pae.authEntersConnecting,
|
|
prefix, sm->auth_pae.authEapLogoffsWhileConnecting,
|
|
prefix, sm->auth_pae.authEntersAuthenticating,
|
|
prefix, sm->auth_pae.authAuthSuccessesWhileAuthenticating,
|
|
prefix, sm->auth_pae.authAuthTimeoutsWhileAuthenticating,
|
|
prefix, sm->auth_pae.authAuthFailWhileAuthenticating,
|
|
prefix, sm->auth_pae.authAuthEapStartsWhileAuthenticating,
|
|
prefix, sm->auth_pae.authAuthEapLogoffWhileAuthenticating,
|
|
prefix, sm->auth_pae.authAuthReauthsWhileAuthenticated,
|
|
prefix, sm->auth_pae.authAuthEapStartsWhileAuthenticated,
|
|
prefix, sm->auth_pae.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->be_auth.eapNoReq), _SB(sm->be_auth.eapReq),
|
|
_SB(sm->be_auth.eapResp),
|
|
prefix, sm->be_auth.serverTimeout,
|
|
prefix, sm->be_auth.backendResponses,
|
|
prefix, sm->be_auth.backendAccessChallenges,
|
|
prefix, sm->be_auth.backendOtherRequestsToSupplicant,
|
|
prefix, sm->be_auth.backendAuthSuccesses,
|
|
prefix, sm->be_auth.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->reauth_timer.reAuthPeriod,
|
|
_SB(sm->reauth_timer.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->key_rx.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->ctrl_dir.adminControlledDirections),
|
|
ctrl_dir_txt(sm->ctrl_dir.operControlledDirections),
|
|
prefix, _SB(sm->ctrl_dir.operEdge));
|
|
#undef _SB
|
|
}
|
|
#endif /* HOSTAPD_DUMP_STATE */
|
|
|
|
|
|
static Boolean eapol_sm_get_bool(void *ctx, enum eapol_bool_var variable)
|
|
{
|
|
struct eapol_state_machine *sm = ctx;
|
|
if (sm == NULL)
|
|
return FALSE;
|
|
switch (variable) {
|
|
case EAPOL_eapSuccess:
|
|
return sm->eapSuccess;
|
|
case EAPOL_eapRestart:
|
|
return sm->auth_pae.eapRestart;
|
|
case EAPOL_eapFail:
|
|
return sm->eapFail;
|
|
case EAPOL_eapResp:
|
|
return sm->be_auth.eapResp;
|
|
case EAPOL_eapReq:
|
|
return sm->be_auth.eapReq;
|
|
case EAPOL_eapNoReq:
|
|
return sm->be_auth.eapNoReq;
|
|
case EAPOL_portEnabled:
|
|
return sm->portEnabled;
|
|
case EAPOL_eapTimeout:
|
|
return sm->eapTimeout;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static void eapol_sm_set_bool(void *ctx, enum eapol_bool_var variable,
|
|
Boolean value)
|
|
{
|
|
struct eapol_state_machine *sm = ctx;
|
|
if (sm == NULL)
|
|
return;
|
|
switch (variable) {
|
|
case EAPOL_eapSuccess:
|
|
sm->eapSuccess = value;
|
|
break;
|
|
case EAPOL_eapRestart:
|
|
sm->auth_pae.eapRestart = value;
|
|
break;
|
|
case EAPOL_eapFail:
|
|
sm->eapFail = value;
|
|
break;
|
|
case EAPOL_eapResp:
|
|
sm->be_auth.eapResp = value;
|
|
break;
|
|
case EAPOL_eapReq:
|
|
sm->be_auth.eapReq = value;
|
|
break;
|
|
case EAPOL_eapNoReq:
|
|
sm->be_auth.eapNoReq = value;
|
|
break;
|
|
case EAPOL_portEnabled:
|
|
sm->portEnabled = value;
|
|
break;
|
|
case EAPOL_eapTimeout:
|
|
sm->eapTimeout = value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void eapol_sm_set_eapReqData(void *ctx, const u8 *eapReqData,
|
|
size_t eapReqDataLen)
|
|
{
|
|
struct eapol_state_machine *sm = ctx;
|
|
if (sm == NULL)
|
|
return;
|
|
|
|
free(sm->last_eap_radius);
|
|
sm->last_eap_radius = malloc(eapReqDataLen);
|
|
if (sm->last_eap_radius == NULL)
|
|
return;
|
|
memcpy(sm->last_eap_radius, eapReqData, eapReqDataLen);
|
|
sm->last_eap_radius_len = eapReqDataLen;
|
|
}
|
|
|
|
|
|
static void eapol_sm_set_eapKeyData(void *ctx, const u8 *eapKeyData,
|
|
size_t eapKeyDataLen)
|
|
{
|
|
struct eapol_state_machine *sm = ctx;
|
|
struct hostapd_data *hapd;
|
|
|
|
if (sm == NULL)
|
|
return;
|
|
|
|
hapd = sm->hapd;
|
|
|
|
if (eapKeyData && eapKeyDataLen >= 64) {
|
|
free(sm->eapol_key_sign);
|
|
free(sm->eapol_key_crypt);
|
|
sm->eapol_key_crypt = malloc(32);
|
|
if (sm->eapol_key_crypt) {
|
|
memcpy(sm->eapol_key_crypt, eapKeyData, 32);
|
|
sm->eapol_key_crypt_len = 32;
|
|
}
|
|
sm->eapol_key_sign = malloc(32);
|
|
if (sm->eapol_key_sign) {
|
|
memcpy(sm->eapol_key_sign, eapKeyData + 32, 32);
|
|
sm->eapol_key_sign_len = 32;
|
|
}
|
|
if (hapd->default_wep_key ||
|
|
hapd->conf->individual_wep_key_len > 0 ||
|
|
hapd->conf->wpa)
|
|
sm->keyAvailable = TRUE;
|
|
} else {
|
|
free(sm->eapol_key_sign);
|
|
free(sm->eapol_key_crypt);
|
|
sm->eapol_key_sign = NULL;
|
|
sm->eapol_key_crypt = NULL;
|
|
sm->eapol_key_sign_len = 0;
|
|
sm->eapol_key_crypt_len = 0;
|
|
sm->keyAvailable = FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
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;
|
|
const struct hostapd_eap_user *eap_user;
|
|
|
|
eap_user = hostapd_get_eap_user(sm->hapd->conf, identity,
|
|
identity_len, phase2);
|
|
if (eap_user == NULL)
|
|
return -1;
|
|
|
|
memset(user, 0, sizeof(*user));
|
|
user->phase2 = phase2;
|
|
memcpy(user->methods, eap_user->methods,
|
|
EAP_USER_MAX_METHODS > EAP_MAX_METHODS ?
|
|
EAP_USER_MAX_METHODS : EAP_MAX_METHODS);
|
|
|
|
if (eap_user->password) {
|
|
user->password = malloc(eap_user->password_len);
|
|
if (user->password == NULL)
|
|
return -1;
|
|
memcpy(user->password, eap_user->password,
|
|
eap_user->password_len);
|
|
user->password_len = eap_user->password_len;
|
|
}
|
|
user->force_version = eap_user->force_version;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct eapol_callbacks eapol_cb =
|
|
{
|
|
.get_bool = eapol_sm_get_bool,
|
|
.set_bool = eapol_sm_set_bool,
|
|
.set_eapReqData = eapol_sm_set_eapReqData,
|
|
.set_eapKeyData = eapol_sm_set_eapKeyData,
|
|
.get_eap_user = eapol_sm_get_eap_user,
|
|
};
|