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