1 /* 2 * EAPOL supplicant state machines 3 * Copyright (c) 2004-2012, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef EAPOL_SUPP_SM_H 10 #define EAPOL_SUPP_SM_H 11 12 #include "common/defs.h" 13 14 typedef enum { Unauthorized, Authorized } PortStatus; 15 typedef enum { Auto, ForceUnauthorized, ForceAuthorized } PortControl; 16 17 /** 18 * struct eapol_config - Per network configuration for EAPOL state machines 19 */ 20 struct eapol_config { 21 /** 22 * accept_802_1x_keys - Accept IEEE 802.1X (non-WPA) EAPOL-Key frames 23 * 24 * This variable should be set to 1 when using EAPOL state machines 25 * with non-WPA security policy to generate dynamic WEP keys. When 26 * using WPA, this should be set to 0 so that WPA state machine can 27 * process the EAPOL-Key frames. 28 */ 29 int accept_802_1x_keys; 30 31 #define EAPOL_REQUIRE_KEY_UNICAST BIT(0) 32 #define EAPOL_REQUIRE_KEY_BROADCAST BIT(1) 33 /** 34 * required_keys - Which EAPOL-Key packets are required 35 * 36 * This variable determines which EAPOL-Key packets are required before 37 * marking connection authenticated. This is a bit field of 38 * EAPOL_REQUIRE_KEY_UNICAST and EAPOL_REQUIRE_KEY_BROADCAST flags. 39 */ 40 int required_keys; 41 42 /** 43 * fast_reauth - Whether fast EAP reauthentication is enabled 44 */ 45 int fast_reauth; 46 47 /** 48 * workaround - Whether EAP workarounds are enabled 49 */ 50 unsigned int workaround; 51 52 /** 53 * eap_disabled - Whether EAP is disabled 54 */ 55 int eap_disabled; 56 57 /** 58 * external_sim - Use external processing for SIM/USIM operations 59 */ 60 int external_sim; 61 }; 62 63 struct eapol_sm; 64 struct wpa_config_blob; 65 66 enum eapol_supp_result { 67 EAPOL_SUPP_RESULT_FAILURE, 68 EAPOL_SUPP_RESULT_SUCCESS, 69 EAPOL_SUPP_RESULT_EXPECTED_FAILURE 70 }; 71 72 /** 73 * struct eapol_ctx - Global (for all networks) EAPOL state machine context 74 */ 75 struct eapol_ctx { 76 /** 77 * ctx - Pointer to arbitrary upper level context 78 */ 79 void *ctx; 80 81 /** 82 * preauth - IEEE 802.11i/RSN pre-authentication 83 * 84 * This EAPOL state machine is used for IEEE 802.11i/RSN 85 * pre-authentication 86 */ 87 int preauth; 88 89 /** 90 * cb - Function to be called when EAPOL negotiation has been completed 91 * @eapol: Pointer to EAPOL state machine data 92 * @result: Whether the authentication was completed successfully 93 * @ctx: Pointer to context data (cb_ctx) 94 * 95 * This optional callback function will be called when the EAPOL 96 * authentication has been completed. This allows the owner of the 97 * EAPOL state machine to process the key and terminate the EAPOL state 98 * machine. Currently, this is used only in RSN pre-authentication. 99 */ 100 void (*cb)(struct eapol_sm *eapol, enum eapol_supp_result result, 101 void *ctx); 102 103 /** 104 * cb_ctx - Callback context for cb() 105 */ 106 void *cb_ctx; 107 108 /** 109 * msg_ctx - Callback context for wpa_msg() calls 110 */ 111 void *msg_ctx; 112 113 /** 114 * scard_ctx - Callback context for PC/SC scard_*() function calls 115 * 116 * This context can be updated with eapol_sm_register_scard_ctx(). 117 */ 118 void *scard_ctx; 119 120 /** 121 * eapol_send_ctx - Callback context for eapol_send() calls 122 */ 123 void *eapol_send_ctx; 124 125 /** 126 * eapol_done_cb - Function to be called at successful completion 127 * @ctx: Callback context (ctx) 128 * 129 * This function is called at the successful completion of EAPOL 130 * authentication. If dynamic WEP keys are used, this is called only 131 * after all the expected keys have been received. 132 */ 133 void (*eapol_done_cb)(void *ctx); 134 135 /** 136 * eapol_send - Send EAPOL packets 137 * @ctx: Callback context (eapol_send_ctx) 138 * @type: EAPOL type (IEEE802_1X_TYPE_*) 139 * @buf: Pointer to EAPOL payload 140 * @len: Length of the EAPOL payload 141 * Returns: 0 on success, -1 on failure 142 */ 143 int (*eapol_send)(void *ctx, int type, const u8 *buf, size_t len); 144 145 /** 146 * set_wep_key - Configure WEP keys 147 * @ctx: Callback context (ctx) 148 * @unicast: Non-zero = unicast, 0 = multicast/broadcast key 149 * @keyidx: Key index (0..3) 150 * @key: WEP key 151 * @keylen: Length of the WEP key 152 * Returns: 0 on success, -1 on failure 153 */ 154 int (*set_wep_key)(void *ctx, int unicast, int keyidx, 155 const u8 *key, size_t keylen); 156 157 /** 158 * set_config_blob - Set or add a named configuration blob 159 * @ctx: Callback context (ctx) 160 * @blob: New value for the blob 161 * 162 * Adds a new configuration blob or replaces the current value of an 163 * existing blob. 164 */ 165 void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob); 166 167 /** 168 * get_config_blob - Get a named configuration blob 169 * @ctx: Callback context (ctx) 170 * @name: Name of the blob 171 * Returns: Pointer to blob data or %NULL if not found 172 */ 173 const struct wpa_config_blob * (*get_config_blob)(void *ctx, 174 const char *name); 175 176 /** 177 * aborted_cached - Notify that cached PMK attempt was aborted 178 * @ctx: Callback context (ctx) 179 */ 180 void (*aborted_cached)(void *ctx); 181 182 /** 183 * opensc_engine_path - Path to the OpenSSL engine for opensc 184 * 185 * This is an OpenSSL specific configuration option for loading OpenSC 186 * engine (engine_opensc.so); if %NULL, this engine is not loaded. 187 */ 188 const char *opensc_engine_path; 189 190 /** 191 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11 192 * 193 * This is an OpenSSL specific configuration option for loading PKCS#11 194 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded. 195 */ 196 const char *pkcs11_engine_path; 197 198 /** 199 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module 200 * 201 * This is an OpenSSL specific configuration option for configuring 202 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this 203 * module is not loaded. 204 */ 205 const char *pkcs11_module_path; 206 207 /** 208 * wps - WPS context data 209 * 210 * This is only used by EAP-WSC and can be left %NULL if not available. 211 */ 212 struct wps_context *wps; 213 214 /** 215 * eap_param_needed - Notify that EAP parameter is needed 216 * @ctx: Callback context (ctx) 217 * @field: Field indicator (e.g., WPA_CTRL_REQ_EAP_IDENTITY) 218 * @txt: User readable text describing the required parameter 219 */ 220 void (*eap_param_needed)(void *ctx, enum wpa_ctrl_req_type field, 221 const char *txt); 222 223 /** 224 * port_cb - Set port authorized/unauthorized callback (optional) 225 * @ctx: Callback context (ctx) 226 * @authorized: Whether the supplicant port is now in authorized state 227 */ 228 void (*port_cb)(void *ctx, int authorized); 229 230 /** 231 * cert_cb - Notification of a peer certificate 232 * @ctx: Callback context (ctx) 233 * @depth: Depth in certificate chain (0 = server) 234 * @subject: Subject of the peer certificate 235 * @cert_hash: SHA-256 hash of the certificate 236 * @cert: Peer certificate 237 */ 238 void (*cert_cb)(void *ctx, int depth, const char *subject, 239 const char *cert_hash, const struct wpabuf *cert); 240 241 /** 242 * cert_in_cb - Include server certificates in callback 243 */ 244 int cert_in_cb; 245 246 /** 247 * status_cb - Notification of a change in EAP status 248 * @ctx: Callback context (ctx) 249 * @status: Step in the process of EAP authentication 250 * @parameter: Step-specific parameter, e.g., EAP method name 251 */ 252 void (*status_cb)(void *ctx, const char *status, 253 const char *parameter); 254 255 /** 256 * set_anon_id - Set or add anonymous identity 257 * @ctx: eapol_ctx from eap_peer_sm_init() call 258 * @id: Anonymous identity (e.g., EAP-SIM pseudonym) 259 * @len: Length of anonymous identity in octets 260 */ 261 void (*set_anon_id)(void *ctx, const u8 *id, size_t len); 262 }; 263 264 265 struct eap_peer_config; 266 struct ext_password_data; 267 268 #ifdef IEEE8021X_EAPOL 269 struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx); 270 void eapol_sm_deinit(struct eapol_sm *sm); 271 void eapol_sm_step(struct eapol_sm *sm); 272 int eapol_sm_get_status(struct eapol_sm *sm, char *buf, size_t buflen, 273 int verbose); 274 int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, size_t buflen); 275 void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, int authPeriod, 276 int startPeriod, int maxStart); 277 int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, const u8 *buf, 278 size_t len); 279 void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm); 280 void eapol_sm_notify_portEnabled(struct eapol_sm *sm, Boolean enabled); 281 void eapol_sm_notify_portValid(struct eapol_sm *sm, Boolean valid); 282 void eapol_sm_notify_eap_success(struct eapol_sm *sm, Boolean success); 283 void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail); 284 void eapol_sm_notify_config(struct eapol_sm *sm, 285 struct eap_peer_config *config, 286 const struct eapol_config *conf); 287 int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len); 288 const u8 * eapol_sm_get_session_id(struct eapol_sm *sm, size_t *len); 289 void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff); 290 void eapol_sm_notify_cached(struct eapol_sm *sm); 291 void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm, int attempt); 292 void eapol_sm_register_scard_ctx(struct eapol_sm *sm, void *ctx); 293 void eapol_sm_notify_portControl(struct eapol_sm *sm, PortControl portControl); 294 void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm); 295 void eapol_sm_notify_ctrl_response(struct eapol_sm *sm); 296 void eapol_sm_request_reauth(struct eapol_sm *sm); 297 void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, int in_eapol_sm); 298 void eapol_sm_invalidate_cached_session(struct eapol_sm *sm); 299 const char * eapol_sm_get_method_name(struct eapol_sm *sm); 300 void eapol_sm_set_ext_pw_ctx(struct eapol_sm *sm, 301 struct ext_password_data *ext); 302 int eapol_sm_failed(struct eapol_sm *sm); 303 int eapol_sm_get_eap_proxy_imsi(struct eapol_sm *sm, char *imsi, size_t *len); 304 #else /* IEEE8021X_EAPOL */ 305 static inline struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx) 306 { 307 free(ctx); 308 return (struct eapol_sm *) 1; 309 } 310 static inline void eapol_sm_deinit(struct eapol_sm *sm) 311 { 312 } 313 static inline void eapol_sm_step(struct eapol_sm *sm) 314 { 315 } 316 static inline int eapol_sm_get_status(struct eapol_sm *sm, char *buf, 317 size_t buflen, int verbose) 318 { 319 return 0; 320 } 321 static inline int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, 322 size_t buflen) 323 { 324 return 0; 325 } 326 static inline void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, 327 int authPeriod, int startPeriod, 328 int maxStart) 329 { 330 } 331 static inline int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, 332 const u8 *buf, size_t len) 333 { 334 return 0; 335 } 336 static inline void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm) 337 { 338 } 339 static inline void eapol_sm_notify_portEnabled(struct eapol_sm *sm, 340 Boolean enabled) 341 { 342 } 343 static inline void eapol_sm_notify_portValid(struct eapol_sm *sm, 344 Boolean valid) 345 { 346 } 347 static inline void eapol_sm_notify_eap_success(struct eapol_sm *sm, 348 Boolean success) 349 { 350 } 351 static inline void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail) 352 { 353 } 354 static inline void eapol_sm_notify_config(struct eapol_sm *sm, 355 struct eap_peer_config *config, 356 struct eapol_config *conf) 357 { 358 } 359 static inline int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len) 360 { 361 return -1; 362 } 363 static inline void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff) 364 { 365 } 366 static inline void eapol_sm_notify_cached(struct eapol_sm *sm) 367 { 368 } 369 #define eapol_sm_notify_pmkid_attempt(sm, attempt) do { } while (0) 370 #define eapol_sm_register_scard_ctx(sm, ctx) do { } while (0) 371 static inline void eapol_sm_notify_portControl(struct eapol_sm *sm, 372 PortControl portControl) 373 { 374 } 375 static inline void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm) 376 { 377 } 378 static inline void eapol_sm_notify_ctrl_response(struct eapol_sm *sm) 379 { 380 } 381 static inline void eapol_sm_request_reauth(struct eapol_sm *sm) 382 { 383 } 384 static inline void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, 385 int in_eapol_sm) 386 { 387 } 388 static inline void eapol_sm_invalidate_cached_session(struct eapol_sm *sm) 389 { 390 } 391 static inline const char * eapol_sm_get_method_name(struct eapol_sm *sm) 392 { 393 return NULL; 394 } 395 static inline void eapol_sm_set_ext_pw_ctx(struct eapol_sm *sm, 396 struct ext_password_data *ext) 397 { 398 } 399 static inline int eapol_sm_failed(struct eapol_sm *sm) 400 { 401 return 0; 402 } 403 #endif /* IEEE8021X_EAPOL */ 404 405 #endif /* EAPOL_SUPP_SM_H */ 406
