1 /* 2 * EAPOL supplicant state machines 3 * Copyright (c) 2004-2012, Jouni Malinen <j@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 struct tls_cert_data; 15 16 typedef enum { Unauthorized, Authorized } PortStatus; 17 typedef enum { Auto, ForceUnauthorized, ForceAuthorized } PortControl; 18 19 /** 20 * struct eapol_config - Per network configuration for EAPOL state machines 21 */ 22 struct eapol_config { 23 /** 24 * accept_802_1x_keys - Accept IEEE 802.1X (non-WPA) EAPOL-Key frames 25 * 26 * This variable should be set to 1 when using EAPOL state machines 27 * with non-WPA security policy to generate dynamic WEP keys. When 28 * using WPA, this should be set to 0 so that WPA state machine can 29 * process the EAPOL-Key frames. 30 */ 31 int accept_802_1x_keys; 32 33 #define EAPOL_REQUIRE_KEY_UNICAST BIT(0) 34 #define EAPOL_REQUIRE_KEY_BROADCAST BIT(1) 35 /** 36 * required_keys - Which EAPOL-Key packets are required 37 * 38 * This variable determines which EAPOL-Key packets are required before 39 * marking connection authenticated. This is a bit field of 40 * EAPOL_REQUIRE_KEY_UNICAST and EAPOL_REQUIRE_KEY_BROADCAST flags. 41 */ 42 int required_keys; 43 44 /** 45 * fast_reauth - Whether fast EAP reauthentication is enabled 46 */ 47 int fast_reauth; 48 49 /** 50 * workaround - Whether EAP workarounds are enabled 51 */ 52 unsigned int workaround; 53 54 /** 55 * eap_disabled - Whether EAP is disabled 56 */ 57 int eap_disabled; 58 59 /** 60 * external_sim - Use external processing for SIM/USIM operations 61 */ 62 int external_sim; 63 64 #define EAPOL_LOCAL_WPS_IN_USE BIT(0) 65 #define EAPOL_PEER_IS_WPS20_AP BIT(1) 66 /** 67 * wps - Whether this connection is used for WPS 68 */ 69 int wps; 70 }; 71 72 struct eapol_sm; 73 struct wpa_config_blob; 74 75 enum eapol_supp_result { 76 EAPOL_SUPP_RESULT_FAILURE, 77 EAPOL_SUPP_RESULT_SUCCESS, 78 EAPOL_SUPP_RESULT_EXPECTED_FAILURE 79 }; 80 81 /** 82 * struct eapol_ctx - Global (for all networks) EAPOL state machine context 83 */ 84 struct eapol_ctx { 85 /** 86 * ctx - Pointer to arbitrary upper level context 87 */ 88 void *ctx; 89 90 /** 91 * preauth - IEEE 802.11i/RSN pre-authentication 92 * 93 * This EAPOL state machine is used for IEEE 802.11i/RSN 94 * pre-authentication 95 */ 96 int preauth; 97 98 /** 99 * cb - Function to be called when EAPOL negotiation has been completed 100 * @eapol: Pointer to EAPOL state machine data 101 * @result: Whether the authentication was completed successfully 102 * @ctx: Pointer to context data (cb_ctx) 103 * 104 * This optional callback function will be called when the EAPOL 105 * authentication has been completed. This allows the owner of the 106 * EAPOL state machine to process the key and terminate the EAPOL state 107 * machine. Currently, this is used only in RSN pre-authentication. 108 */ 109 void (*cb)(struct eapol_sm *eapol, enum eapol_supp_result result, 110 void *ctx); 111 112 /** 113 * cb_ctx - Callback context for cb() 114 */ 115 void *cb_ctx; 116 117 /** 118 * msg_ctx - Callback context for wpa_msg() calls 119 */ 120 void *msg_ctx; 121 122 /** 123 * scard_ctx - Callback context for PC/SC scard_*() function calls 124 * 125 * This context can be updated with eapol_sm_register_scard_ctx(). 126 */ 127 void *scard_ctx; 128 129 /** 130 * eapol_send_ctx - Callback context for eapol_send() calls 131 */ 132 void *eapol_send_ctx; 133 134 /** 135 * eapol_done_cb - Function to be called at successful completion 136 * @ctx: Callback context (ctx) 137 * 138 * This function is called at the successful completion of EAPOL 139 * authentication. If dynamic WEP keys are used, this is called only 140 * after all the expected keys have been received. 141 */ 142 void (*eapol_done_cb)(void *ctx); 143 144 /** 145 * eapol_send - Send EAPOL packets 146 * @ctx: Callback context (eapol_send_ctx) 147 * @type: EAPOL type (IEEE802_1X_TYPE_*) 148 * @buf: Pointer to EAPOL payload 149 * @len: Length of the EAPOL payload 150 * Returns: 0 on success, -1 on failure 151 */ 152 int (*eapol_send)(void *ctx, int type, const u8 *buf, size_t len); 153 154 /** 155 * set_wep_key - Configure WEP keys 156 * @ctx: Callback context (ctx) 157 * @unicast: Non-zero = unicast, 0 = multicast/broadcast key 158 * @keyidx: Key index (0..3) 159 * @key: WEP key 160 * @keylen: Length of the WEP key 161 * Returns: 0 on success, -1 on failure 162 */ 163 int (*set_wep_key)(void *ctx, int unicast, int keyidx, 164 const u8 *key, size_t keylen); 165 166 /** 167 * set_config_blob - Set or add a named configuration blob 168 * @ctx: Callback context (ctx) 169 * @blob: New value for the blob 170 * 171 * Adds a new configuration blob or replaces the current value of an 172 * existing blob. 173 */ 174 void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob); 175 176 /** 177 * get_config_blob - Get a named configuration blob 178 * @ctx: Callback context (ctx) 179 * @name: Name of the blob 180 * Returns: Pointer to blob data or %NULL if not found 181 */ 182 const struct wpa_config_blob * (*get_config_blob)(void *ctx, 183 const char *name); 184 185 /** 186 * aborted_cached - Notify that cached PMK attempt was aborted 187 * @ctx: Callback context (ctx) 188 */ 189 void (*aborted_cached)(void *ctx); 190 191 #ifndef CONFIG_OPENSC_ENGINE_PATH 192 /** 193 * opensc_engine_path - Path to the OpenSSL engine for opensc 194 * 195 * This is an OpenSSL specific configuration option for loading OpenSC 196 * engine (engine_opensc.so); if %NULL, this engine is not loaded. 197 */ 198 const char *opensc_engine_path; 199 #endif /* CONFIG_OPENSC_ENGINE_PATH */ 200 201 #ifndef CONFIG_PKCS11_ENGINE_PATH 202 /** 203 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11 204 * 205 * This is an OpenSSL specific configuration option for loading PKCS#11 206 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded. 207 */ 208 const char *pkcs11_engine_path; 209 #endif /* CONFIG_PKCS11_ENGINE_PATH */ 210 211 #ifndef CONFIG_PKCS11_MODULE_PATH 212 /** 213 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module 214 * 215 * This is an OpenSSL specific configuration option for configuring 216 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this 217 * module is not loaded. 218 */ 219 const char *pkcs11_module_path; 220 #endif /* CONFIG_PKCS11_MODULE_PATH */ 221 222 /** 223 * openssl_ciphers - OpenSSL cipher string 224 * 225 * This is an OpenSSL specific configuration option for configuring the 226 * default ciphers. If not set, "DEFAULT:!EXP:!LOW" is used as the 227 * default. 228 */ 229 const char *openssl_ciphers; 230 231 /** 232 * wps - WPS context data 233 * 234 * This is only used by EAP-WSC and can be left %NULL if not available. 235 */ 236 struct wps_context *wps; 237 238 /** 239 * eap_param_needed - Notify that EAP parameter is needed 240 * @ctx: Callback context (ctx) 241 * @field: Field indicator (e.g., WPA_CTRL_REQ_EAP_IDENTITY) 242 * @txt: User readable text describing the required parameter 243 */ 244 void (*eap_param_needed)(void *ctx, enum wpa_ctrl_req_type field, 245 const char *txt); 246 247 /** 248 * port_cb - Set port authorized/unauthorized callback (optional) 249 * @ctx: Callback context (ctx) 250 * @authorized: Whether the supplicant port is now in authorized state 251 */ 252 void (*port_cb)(void *ctx, int authorized); 253 254 /** 255 * cert_cb - Notification of a peer certificate 256 * @ctx: Callback context (ctx) 257 * @cert: Certificate information 258 * @cert_hash: SHA-256 hash of the certificate 259 */ 260 void (*cert_cb)(void *ctx, struct tls_cert_data *cert, 261 const char *cert_hash); 262 263 /** 264 * cert_in_cb - Include server certificates in callback 265 */ 266 int cert_in_cb; 267 268 /** 269 * status_cb - Notification of a change in EAP status 270 * @ctx: Callback context (ctx) 271 * @status: Step in the process of EAP authentication 272 * @parameter: Step-specific parameter, e.g., EAP method name 273 */ 274 void (*status_cb)(void *ctx, const char *status, 275 const char *parameter); 276 277 /** 278 * eap_error_cb - Notification of EAP method error 279 * @ctx: Callback context (ctx) 280 * @error_code: EAP method error code 281 */ 282 void (*eap_error_cb)(void *ctx, int error_code); 283 284 #ifdef CONFIG_EAP_PROXY 285 /** 286 * eap_proxy_cb - Callback signifying any updates from eap_proxy 287 * @ctx: eapol_ctx from eap_peer_sm_init() call 288 */ 289 void (*eap_proxy_cb)(void *ctx); 290 291 /** 292 * eap_proxy_notify_sim_status - Notification of SIM status change 293 * @ctx: eapol_ctx from eap_peer_sm_init() call 294 * @status: One of enum value from sim_state 295 */ 296 void (*eap_proxy_notify_sim_status)(void *ctx, 297 enum eap_proxy_sim_state sim_state); 298 #endif /* CONFIG_EAP_PROXY */ 299 300 /** 301 * set_anon_id - Set or add anonymous identity 302 * @ctx: eapol_ctx from eap_peer_sm_init() call 303 * @id: Anonymous identity (e.g., EAP-SIM pseudonym) 304 * @len: Length of anonymous identity in octets 305 */ 306 void (*set_anon_id)(void *ctx, const u8 *id, size_t len); 307 308 /** 309 * confirm_auth_cb - Callback confirming if we can install a new PTK 310 * @ctx: eapol_ctx from eap_peer_sm_init() call 311 * Returns: 0 when authentication can continue, -1 when reconnecting 312 * 313 * Automatically triggers a reconnect when not. 314 */ 315 int (*confirm_auth_cb)(void *ctx); 316 317 /** 318 * encryption_required - Check whether encryption is required 319 * @ctx: eapol_ctx from eap_peer_sm_init() call 320 * Returns: Whether the current session requires encryption 321 */ 322 bool (*encryption_required)(void *ctx); 323 }; 324 325 326 struct eap_peer_config; 327 struct ext_password_data; 328 329 #ifdef IEEE8021X_EAPOL 330 struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx); 331 void eapol_sm_deinit(struct eapol_sm *sm); 332 void eapol_sm_step(struct eapol_sm *sm); 333 int eapol_sm_get_status(struct eapol_sm *sm, char *buf, size_t buflen, 334 int verbose); 335 int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, size_t buflen); 336 void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, int authPeriod, 337 int startPeriod, int maxStart); 338 int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, const u8 *buf, 339 size_t len, enum frame_encryption encrypted); 340 void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm); 341 void eapol_sm_notify_portEnabled(struct eapol_sm *sm, bool enabled); 342 void eapol_sm_notify_portValid(struct eapol_sm *sm, bool valid); 343 void eapol_sm_notify_eap_success(struct eapol_sm *sm, bool success); 344 void eapol_sm_notify_eap_fail(struct eapol_sm *sm, bool fail); 345 void eapol_sm_notify_config(struct eapol_sm *sm, 346 struct eap_peer_config *config, 347 const struct eapol_config *conf); 348 int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len); 349 const u8 * eapol_sm_get_session_id(struct eapol_sm *sm, size_t *len); 350 void eapol_sm_notify_logoff(struct eapol_sm *sm, bool logoff); 351 void eapol_sm_notify_cached(struct eapol_sm *sm); 352 void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm); 353 void eapol_sm_register_scard_ctx(struct eapol_sm *sm, void *ctx); 354 void eapol_sm_notify_portControl(struct eapol_sm *sm, PortControl portControl); 355 void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm); 356 void eapol_sm_notify_ctrl_response(struct eapol_sm *sm); 357 void eapol_sm_request_reauth(struct eapol_sm *sm); 358 void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, int in_eapol_sm); 359 void eapol_sm_invalidate_cached_session(struct eapol_sm *sm); 360 const char * eapol_sm_get_method_name(struct eapol_sm *sm); 361 void eapol_sm_set_ext_pw_ctx(struct eapol_sm *sm, 362 struct ext_password_data *ext); 363 int eapol_sm_failed(struct eapol_sm *sm); 364 void eapol_sm_erp_flush(struct eapol_sm *sm); 365 struct wpabuf * eapol_sm_build_erp_reauth_start(struct eapol_sm *sm); 366 void eapol_sm_process_erp_finish(struct eapol_sm *sm, const u8 *buf, 367 size_t len); 368 int eapol_sm_get_eap_proxy_imsi(void *ctx, int sim_num, char *imsi, 369 size_t *len); 370 int eapol_sm_update_erp_next_seq_num(struct eapol_sm *sm, u16 next_seq_num); 371 int eapol_sm_get_erp_info(struct eapol_sm *sm, struct eap_peer_config *config, 372 const u8 **username, size_t *username_len, 373 const u8 **realm, size_t *realm_len, 374 u16 *erp_next_seq_num, const u8 **rrk, 375 size_t *rrk_len); 376 377 #else /* IEEE8021X_EAPOL */ eapol_sm_init(struct eapol_ctx * ctx)378 static inline struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx) 379 { 380 free(ctx); 381 return (struct eapol_sm *) 1; 382 } eapol_sm_deinit(struct eapol_sm * sm)383 static inline void eapol_sm_deinit(struct eapol_sm *sm) 384 { 385 } eapol_sm_step(struct eapol_sm * sm)386 static inline void eapol_sm_step(struct eapol_sm *sm) 387 { 388 } eapol_sm_get_status(struct eapol_sm * sm,char * buf,size_t buflen,int verbose)389 static inline int eapol_sm_get_status(struct eapol_sm *sm, char *buf, 390 size_t buflen, int verbose) 391 { 392 return 0; 393 } eapol_sm_get_mib(struct eapol_sm * sm,char * buf,size_t buflen)394 static inline int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, 395 size_t buflen) 396 { 397 return 0; 398 } eapol_sm_configure(struct eapol_sm * sm,int heldPeriod,int authPeriod,int startPeriod,int maxStart)399 static inline void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, 400 int authPeriod, int startPeriod, 401 int maxStart) 402 { 403 } eapol_sm_rx_eapol(struct eapol_sm * sm,const u8 * src,const u8 * buf,size_t len,enum frame_encryption encrypted)404 static inline int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, 405 const u8 *buf, size_t len, 406 enum frame_encryption encrypted) 407 { 408 return 0; 409 } eapol_sm_notify_tx_eapol_key(struct eapol_sm * sm)410 static inline void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm) 411 { 412 } eapol_sm_notify_portEnabled(struct eapol_sm * sm,bool enabled)413 static inline void eapol_sm_notify_portEnabled(struct eapol_sm *sm, 414 bool enabled) 415 { 416 } eapol_sm_notify_portValid(struct eapol_sm * sm,bool valid)417 static inline void eapol_sm_notify_portValid(struct eapol_sm *sm, 418 bool valid) 419 { 420 } eapol_sm_notify_eap_success(struct eapol_sm * sm,bool success)421 static inline void eapol_sm_notify_eap_success(struct eapol_sm *sm, 422 bool success) 423 { 424 } eapol_sm_notify_eap_fail(struct eapol_sm * sm,bool fail)425 static inline void eapol_sm_notify_eap_fail(struct eapol_sm *sm, bool fail) 426 { 427 } eapol_sm_notify_config(struct eapol_sm * sm,struct eap_peer_config * config,struct eapol_config * conf)428 static inline void eapol_sm_notify_config(struct eapol_sm *sm, 429 struct eap_peer_config *config, 430 struct eapol_config *conf) 431 { 432 } eapol_sm_get_key(struct eapol_sm * sm,u8 * key,size_t len)433 static inline int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len) 434 { 435 return -1; 436 } 437 static inline const u8 * eapol_sm_get_session_id(struct eapol_sm * sm,size_t * len)438 eapol_sm_get_session_id(struct eapol_sm *sm, size_t *len) 439 { 440 return NULL; 441 } eapol_sm_notify_logoff(struct eapol_sm * sm,bool logoff)442 static inline void eapol_sm_notify_logoff(struct eapol_sm *sm, bool logoff) 443 { 444 } eapol_sm_notify_cached(struct eapol_sm * sm)445 static inline void eapol_sm_notify_cached(struct eapol_sm *sm) 446 { 447 } eapol_sm_notify_pmkid_attempt(struct eapol_sm * sm)448 static inline void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm) 449 { 450 } 451 #define eapol_sm_register_scard_ctx(sm, ctx) do { } while (0) eapol_sm_notify_portControl(struct eapol_sm * sm,PortControl portControl)452 static inline void eapol_sm_notify_portControl(struct eapol_sm *sm, 453 PortControl portControl) 454 { 455 } eapol_sm_notify_ctrl_attached(struct eapol_sm * sm)456 static inline void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm) 457 { 458 } eapol_sm_notify_ctrl_response(struct eapol_sm * sm)459 static inline void eapol_sm_notify_ctrl_response(struct eapol_sm *sm) 460 { 461 } eapol_sm_request_reauth(struct eapol_sm * sm)462 static inline void eapol_sm_request_reauth(struct eapol_sm *sm) 463 { 464 } eapol_sm_notify_lower_layer_success(struct eapol_sm * sm,int in_eapol_sm)465 static inline void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, 466 int in_eapol_sm) 467 { 468 } eapol_sm_invalidate_cached_session(struct eapol_sm * sm)469 static inline void eapol_sm_invalidate_cached_session(struct eapol_sm *sm) 470 { 471 } eapol_sm_get_method_name(struct eapol_sm * sm)472 static inline const char * eapol_sm_get_method_name(struct eapol_sm *sm) 473 { 474 return NULL; 475 } eapol_sm_set_ext_pw_ctx(struct eapol_sm * sm,struct ext_password_data * ext)476 static inline void eapol_sm_set_ext_pw_ctx(struct eapol_sm *sm, 477 struct ext_password_data *ext) 478 { 479 } eapol_sm_failed(struct eapol_sm * sm)480 static inline int eapol_sm_failed(struct eapol_sm *sm) 481 { 482 return 0; 483 } eapol_sm_erp_flush(struct eapol_sm * sm)484 static inline void eapol_sm_erp_flush(struct eapol_sm *sm) 485 { 486 } 487 static inline struct wpabuf * eapol_sm_build_erp_reauth_start(struct eapol_sm * sm)488 eapol_sm_build_erp_reauth_start(struct eapol_sm *sm) 489 { 490 return NULL; 491 } eapol_sm_process_erp_finish(struct eapol_sm * sm,const u8 * buf,size_t len)492 static inline void eapol_sm_process_erp_finish(struct eapol_sm *sm, 493 const u8 *buf, size_t len) 494 { 495 } eapol_sm_update_erp_next_seq_num(struct eapol_sm * sm,u16 next_seq_num)496 static inline int eapol_sm_update_erp_next_seq_num(struct eapol_sm *sm, 497 u16 next_seq_num) 498 { 499 return -1; 500 } 501 static inline int eapol_sm_get_erp_info(struct eapol_sm * sm,struct eap_peer_config * config,const u8 ** username,size_t * username_len,const u8 ** realm,size_t * realm_len,u16 * erp_next_seq_num,const u8 ** rrk,size_t * rrk_len)502 eapol_sm_get_erp_info(struct eapol_sm *sm, struct eap_peer_config *config, 503 const u8 **username, size_t *username_len, 504 const u8 **realm, size_t *realm_len, 505 u16 *erp_next_seq_num, const u8 **rrk, size_t *rrk_len) 506 { 507 return -1; 508 } 509 #endif /* IEEE8021X_EAPOL */ 510 511 #endif /* EAPOL_SUPP_SM_H */ 512