1 /* 2 * EAPOL supplicant state machines 3 * Copyright (c) 2004-2008, 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 }; 234 235 236 struct eap_peer_config; 237 238 #ifdef IEEE8021X_EAPOL 239 struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx); 240 void eapol_sm_deinit(struct eapol_sm *sm); 241 void eapol_sm_step(struct eapol_sm *sm); 242 int eapol_sm_get_status(struct eapol_sm *sm, char *buf, size_t buflen, 243 int verbose); 244 int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, size_t buflen); 245 void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, int authPeriod, 246 int startPeriod, int maxStart); 247 int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, const u8 *buf, 248 size_t len); 249 void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm); 250 void eapol_sm_notify_portEnabled(struct eapol_sm *sm, Boolean enabled); 251 void eapol_sm_notify_portValid(struct eapol_sm *sm, Boolean valid); 252 void eapol_sm_notify_eap_success(struct eapol_sm *sm, Boolean success); 253 void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail); 254 void eapol_sm_notify_config(struct eapol_sm *sm, 255 struct eap_peer_config *config, 256 const struct eapol_config *conf); 257 int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len); 258 void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff); 259 void eapol_sm_notify_cached(struct eapol_sm *sm); 260 void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm, int attempt); 261 void eapol_sm_register_scard_ctx(struct eapol_sm *sm, void *ctx); 262 void eapol_sm_notify_portControl(struct eapol_sm *sm, PortControl portControl); 263 void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm); 264 void eapol_sm_notify_ctrl_response(struct eapol_sm *sm); 265 void eapol_sm_request_reauth(struct eapol_sm *sm); 266 void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, int in_eapol_sm); 267 void eapol_sm_invalidate_cached_session(struct eapol_sm *sm); 268 const char * eapol_sm_get_method_name(struct eapol_sm *sm); 269 #else /* IEEE8021X_EAPOL */ 270 static inline struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx) 271 { 272 free(ctx); 273 return (struct eapol_sm *) 1; 274 } 275 static inline void eapol_sm_deinit(struct eapol_sm *sm) 276 { 277 } 278 static inline void eapol_sm_step(struct eapol_sm *sm) 279 { 280 } 281 static inline int eapol_sm_get_status(struct eapol_sm *sm, char *buf, 282 size_t buflen, int verbose) 283 { 284 return 0; 285 } 286 static inline int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, 287 size_t buflen) 288 { 289 return 0; 290 } 291 static inline void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, 292 int authPeriod, int startPeriod, 293 int maxStart) 294 { 295 } 296 static inline int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, 297 const u8 *buf, size_t len) 298 { 299 return 0; 300 } 301 static inline void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm) 302 { 303 } 304 static inline void eapol_sm_notify_portEnabled(struct eapol_sm *sm, 305 Boolean enabled) 306 { 307 } 308 static inline void eapol_sm_notify_portValid(struct eapol_sm *sm, 309 Boolean valid) 310 { 311 } 312 static inline void eapol_sm_notify_eap_success(struct eapol_sm *sm, 313 Boolean success) 314 { 315 } 316 static inline void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail) 317 { 318 } 319 static inline void eapol_sm_notify_config(struct eapol_sm *sm, 320 struct eap_peer_config *config, 321 struct eapol_config *conf) 322 { 323 } 324 static inline int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len) 325 { 326 return -1; 327 } 328 static inline void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff) 329 { 330 } 331 static inline void eapol_sm_notify_cached(struct eapol_sm *sm) 332 { 333 } 334 #define eapol_sm_notify_pmkid_attempt(sm, attempt) do { } while (0) 335 #define eapol_sm_register_scard_ctx(sm, ctx) do { } while (0) 336 static inline void eapol_sm_notify_portControl(struct eapol_sm *sm, 337 PortControl portControl) 338 { 339 } 340 static inline void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm) 341 { 342 } 343 static inline void eapol_sm_notify_ctrl_response(struct eapol_sm *sm) 344 { 345 } 346 static inline void eapol_sm_request_reauth(struct eapol_sm *sm) 347 { 348 } 349 static inline void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, 350 int in_eapol_sm) 351 { 352 } 353 static inline void eapol_sm_invalidate_cached_session(struct eapol_sm *sm) 354 { 355 } 356 static inline const char * eapol_sm_get_method_name(struct eapol_sm *sm) 357 { 358 return NULL; 359 } 360 #endif /* IEEE8021X_EAPOL */ 361 362 #endif /* EAPOL_SUPP_SM_H */ 363
