2 * hostapd / IEEE 802.1X-2004 Authenticator - EAPOL state machine
3 * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
19 #include "radius/radius.h"
21 /* IEEE Std 802.1X-2004, Ch. 8.2 */
23 typedef enum { ForceUnauthorized = 1, ForceAuthorized = 3, Auto = 2 }
25 typedef enum { Unauthorized = 2, Authorized = 1 } PortState;
26 typedef enum { Both = 0, In = 1 } ControlledDirection;
27 typedef unsigned int Counter;
32 struct eapol_auth_config {
33 int eap_reauth_period;
35 int individual_wep_key_len;
38 void *eap_sim_db_priv;
39 char *eap_req_id_text; /* a copy of this will be allocated */
40 size_t eap_req_id_text_len;
41 u8 *pac_opaque_encr_key;
43 size_t eap_fast_a_id_len;
44 char *eap_fast_a_id_info;
47 int pac_key_refresh_time;
48 int eap_sim_aka_result_ind;
50 struct wps_context *wps;
53 * Pointer to hostapd data. This is a temporary workaround for
54 * transition phase and will be removed once IEEE 802.1X/EAPOL code is
55 * separated more cleanly from rest of hostapd.
57 struct hostapd_data *hapd;
63 EAPOL_LOGGER_DEBUG, EAPOL_LOGGER_INFO, EAPOL_LOGGER_WARNING
66 struct eapol_auth_cb {
67 void (*eapol_send)(void *ctx, void *sta_ctx, u8 type, const u8 *data,
69 void (*aaa_send)(void *ctx, void *sta_ctx, const u8 *data,
71 void (*finished)(void *ctx, void *sta_ctx, int success, int preauth);
72 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
73 int phase2, struct eap_user *user);
74 int (*sta_entry_alive)(void *ctx, const u8 *addr);
75 void (*logger)(void *ctx, const u8 *addr, eapol_logger_level level,
77 void (*set_port_authorized)(void *ctx, void *sta_ctx, int authorized);
78 void (*abort_auth)(void *ctx, void *sta_ctx);
79 void (*tx_key)(void *ctx, void *sta_ctx);
83 * struct eapol_authenticator - Global EAPOL authenticator data
85 struct eapol_authenticator {
86 struct eapol_auth_config conf;
87 struct eapol_auth_cb cb;
90 u8 default_wep_key_idx;
95 * struct eapol_state_machine - Per-Supplicant Authenticator state machines
97 struct eapol_state_machine {
103 /* global variables */
106 PortState authPortStatus;
114 Boolean keyTxEnabled;
115 PortTypes portControl;
117 Boolean reAuthenticate;
119 /* Port Timers state machine */
120 /* 'Boolean tick' implicitly handled as registered timeout */
122 /* Authenticator PAE state machine */
123 enum { AUTH_PAE_INITIALIZE, AUTH_PAE_DISCONNECTED, AUTH_PAE_CONNECTING,
124 AUTH_PAE_AUTHENTICATING, AUTH_PAE_AUTHENTICATED,
125 AUTH_PAE_ABORTING, AUTH_PAE_HELD, AUTH_PAE_FORCE_AUTH,
126 AUTH_PAE_FORCE_UNAUTH, AUTH_PAE_RESTART } auth_pae_state;
131 unsigned int reAuthCount;
133 unsigned int quietPeriod; /* default 60; 0..65535 */
134 #define AUTH_PAE_DEFAULT_quietPeriod 60
135 unsigned int reAuthMax; /* default 2 */
136 #define AUTH_PAE_DEFAULT_reAuthMax 2
138 Counter authEntersConnecting;
139 Counter authEapLogoffsWhileConnecting;
140 Counter authEntersAuthenticating;
141 Counter authAuthSuccessesWhileAuthenticating;
142 Counter authAuthTimeoutsWhileAuthenticating;
143 Counter authAuthFailWhileAuthenticating;
144 Counter authAuthEapStartsWhileAuthenticating;
145 Counter authAuthEapLogoffWhileAuthenticating;
146 Counter authAuthReauthsWhileAuthenticated;
147 Counter authAuthEapStartsWhileAuthenticated;
148 Counter authAuthEapLogoffWhileAuthenticated;
150 /* Backend Authentication state machine */
151 enum { BE_AUTH_REQUEST, BE_AUTH_RESPONSE, BE_AUTH_SUCCESS,
152 BE_AUTH_FAIL, BE_AUTH_TIMEOUT, BE_AUTH_IDLE, BE_AUTH_INITIALIZE,
156 unsigned int serverTimeout; /* default 30; 1..X */
157 #define BE_AUTH_DEFAULT_serverTimeout 30
159 Counter backendResponses;
160 Counter backendAccessChallenges;
161 Counter backendOtherRequestsToSupplicant;
162 Counter backendAuthSuccesses;
163 Counter backendAuthFails;
165 /* Reauthentication Timer state machine */
166 enum { REAUTH_TIMER_INITIALIZE, REAUTH_TIMER_REAUTHENTICATE
167 } reauth_timer_state;
169 unsigned int reAuthPeriod; /* default 3600 s */
170 Boolean reAuthEnabled;
172 /* Authenticator Key Transmit state machine */
173 enum { AUTH_KEY_TX_NO_KEY_TRANSMIT, AUTH_KEY_TX_KEY_TRANSMIT
176 /* Key Receive state machine */
177 enum { KEY_RX_NO_KEY_RECEIVE, KEY_RX_KEY_RECEIVE } key_rx_state;
181 /* Controlled Directions state machine */
182 enum { CTRL_DIR_FORCE_BOTH, CTRL_DIR_IN_OR_BOTH } ctrl_dir_state;
184 ControlledDirection adminControlledDirections;
185 ControlledDirection operControlledDirections;
188 /* Authenticator Statistics Table */
189 Counter dot1xAuthEapolFramesRx;
190 Counter dot1xAuthEapolFramesTx;
191 Counter dot1xAuthEapolStartFramesRx;
192 Counter dot1xAuthEapolLogoffFramesRx;
193 Counter dot1xAuthEapolRespIdFramesRx;
194 Counter dot1xAuthEapolRespFramesRx;
195 Counter dot1xAuthEapolReqIdFramesTx;
196 Counter dot1xAuthEapolReqFramesTx;
197 Counter dot1xAuthInvalidEapolFramesRx;
198 Counter dot1xAuthEapLengthErrorFramesRx;
199 Counter dot1xAuthLastEapolFrameVersion;
201 /* Other variables - not defined in IEEE 802.1X */
202 u8 addr[ETH_ALEN]; /* Supplicant address */
203 #define EAPOL_SM_PREAUTH BIT(0)
204 #define EAPOL_SM_WAIT_START BIT(1)
205 int flags; /* EAPOL_SM_* */
207 /* EAPOL/AAA <-> EAP full authenticator interface */
208 struct eap_eapol_interface *eap_if;
210 int radius_identifier;
211 /* TODO: check when the last messages can be released */
212 struct radius_msg *last_recv_radius;
213 u8 last_eap_id; /* last used EAP Identifier */
216 u8 eap_type_authsrv; /* EAP type of the last EAP packet from
217 * Authentication server */
218 u8 eap_type_supp; /* EAP type of the last EAP packet from Supplicant */
219 struct radius_class_data radius_class;
221 /* Keys for encrypting and signing EAPOL-Key frames */
223 size_t eapol_key_sign_len;
225 size_t eapol_key_crypt_len;
229 Boolean initializing; /* in process of initializing state machines */
232 struct eapol_authenticator *eapol;
234 /* Somewhat nasty pointers to global hostapd and STA data to avoid
235 * passing these to every function */
236 struct hostapd_data *hapd;
237 struct sta_info *sta;
241 struct eapol_authenticator * eapol_auth_init(struct eapol_auth_config *conf,
242 struct eapol_auth_cb *cb);
243 void eapol_auth_deinit(struct eapol_authenticator *eapol);
244 struct eapol_state_machine *
245 eapol_auth_alloc(struct eapol_authenticator *eapol, const u8 *addr,
246 int preauth, struct sta_info *sta);
247 void eapol_auth_free(struct eapol_state_machine *sm);
248 void eapol_auth_step(struct eapol_state_machine *sm);
249 void eapol_auth_initialize(struct eapol_state_machine *sm);
250 void eapol_auth_dump_state(FILE *f, const char *prefix,
251 struct eapol_state_machine *sm);
252 int eapol_auth_eap_pending_cb(struct eapol_state_machine *sm, void *ctx);
254 #endif /* EAPOL_SM_H */