1 /* 2 * EAPOL supplicant state machines 3 * Copyright (c) 2004-2008, Jouni Malinen <j (at) w1.fi> 4 * 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. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef EAPOL_SUPP_SM_H 16 #define EAPOL_SUPP_SM_H 17 18 #include "common/defs.h" 19 20 typedef enum { Unauthorized, Authorized } PortStatus; 21 typedef enum { Auto, ForceUnauthorized, ForceAuthorized } PortControl; 22 23 /** 24 * struct eapol_config - Per network configuration for EAPOL state machines 25 */ 26 struct eapol_config { 27 /** 28 * accept_802_1x_keys - Accept IEEE 802.1X (non-WPA) EAPOL-Key frames 29 * 30 * This variable should be set to 1 when using EAPOL state machines 31 * with non-WPA security policy to generate dynamic WEP keys. When 32 * using WPA, this should be set to 0 so that WPA state machine can 33 * process the EAPOL-Key frames. 34 */ 35 int accept_802_1x_keys; 36 37 #define EAPOL_REQUIRE_KEY_UNICAST BIT(0) 38 #define EAPOL_REQUIRE_KEY_BROADCAST BIT(1) 39 /** 40 * required_keys - Which EAPOL-Key packets are required 41 * 42 * This variable determines which EAPOL-Key packets are required before 43 * marking connection authenticated. This is a bit field of 44 * EAPOL_REQUIRE_KEY_UNICAST and EAPOL_REQUIRE_KEY_BROADCAST flags. 45 */ 46 int required_keys; 47 48 /** 49 * fast_reauth - Whether fast EAP reauthentication is enabled 50 */ 51 int fast_reauth; 52 53 /** 54 * workaround - Whether EAP workarounds are enabled 55 */ 56 unsigned int workaround; 57 58 /** 59 * eap_disabled - Whether EAP is disabled 60 */ 61 int eap_disabled; 62 }; 63 64 struct eapol_sm; 65 struct wpa_config_blob; 66 67 /** 68 * struct eapol_ctx - Global (for all networks) EAPOL state machine context 69 */ 70 struct eapol_ctx { 71 /** 72 * ctx - Pointer to arbitrary upper level context 73 */ 74 void *ctx; 75 76 /** 77 * preauth - IEEE 802.11i/RSN pre-authentication 78 * 79 * This EAPOL state machine is used for IEEE 802.11i/RSN 80 * pre-authentication 81 */ 82 int preauth; 83 84 /** 85 * cb - Function to be called when EAPOL negotiation has been completed 86 * @eapol: Pointer to EAPOL state machine data 87 * @success: Whether the authentication was completed successfully 88 * @ctx: Pointer to context data (cb_ctx) 89 * 90 * This optional callback function will be called when the EAPOL 91 * authentication has been completed. This allows the owner of the 92 * EAPOL state machine to process the key and terminate the EAPOL state 93 * machine. Currently, this is used only in RSN pre-authentication. 94 */ 95 void (*cb)(struct eapol_sm *eapol, int success, void *ctx); 96 97 /** 98 * cb_ctx - Callback context for cb() 99 */ 100 void *cb_ctx; 101 102 /** 103 * msg_ctx - Callback context for wpa_msg() calls 104 */ 105 void *msg_ctx; 106 107 /** 108 * scard_ctx - Callback context for PC/SC scard_*() function calls 109 * 110 * This context can be updated with eapol_sm_register_scard_ctx(). 111 */ 112 void *scard_ctx; 113 114 /** 115 * eapol_send_ctx - Callback context for eapol_send() calls 116 */ 117 void *eapol_send_ctx; 118 119 /** 120 * eapol_done_cb - Function to be called at successful completion 121 * @ctx: Callback context (ctx) 122 * 123 * This function is called at the successful completion of EAPOL 124 * authentication. If dynamic WEP keys are used, this is called only 125 * after all the expected keys have been received. 126 */ 127 void (*eapol_done_cb)(void *ctx); 128 129 /** 130 * eapol_send - Send EAPOL packets 131 * @ctx: Callback context (eapol_send_ctx) 132 * @type: EAPOL type (IEEE802_1X_TYPE_*) 133 * @buf: Pointer to EAPOL payload 134 * @len: Length of the EAPOL payload 135 * Returns: 0 on success, -1 on failure 136 */ 137 int (*eapol_send)(void *ctx, int type, const u8 *buf, size_t len); 138 139 /** 140 * set_wep_key - Configure WEP keys 141 * @ctx: Callback context (ctx) 142 * @unicast: Non-zero = unicast, 0 = multicast/broadcast key 143 * @keyidx: Key index (0..3) 144 * @key: WEP key 145 * @keylen: Length of the WEP key 146 * Returns: 0 on success, -1 on failure 147 */ 148 int (*set_wep_key)(void *ctx, int unicast, int keyidx, 149 const u8 *key, size_t keylen); 150 151 /** 152 * set_config_blob - Set or add a named configuration blob 153 * @ctx: Callback context (ctx) 154 * @blob: New value for the blob 155 * 156 * Adds a new configuration blob or replaces the current value of an 157 * existing blob. 158 */ 159 void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob); 160 161 /** 162 * get_config_blob - Get a named configuration blob 163 * @ctx: Callback context (ctx) 164 * @name: Name of the blob 165 * Returns: Pointer to blob data or %NULL if not found 166 */ 167 const struct wpa_config_blob * (*get_config_blob)(void *ctx, 168 const char *name); 169 170 /** 171 * aborted_cached - Notify that cached PMK attempt was aborted 172 * @ctx: Callback context (ctx) 173 */ 174 void (*aborted_cached)(void *ctx); 175 176 /** 177 * opensc_engine_path - Path to the OpenSSL engine for opensc 178 * 179 * This is an OpenSSL specific configuration option for loading OpenSC 180 * engine (engine_opensc.so); if %NULL, this engine is not loaded. 181 */ 182 const char *opensc_engine_path; 183 184 /** 185 * pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11 186 * 187 * This is an OpenSSL specific configuration option for loading PKCS#11 188 * engine (engine_pkcs11.so); if %NULL, this engine is not loaded. 189 */ 190 const char *pkcs11_engine_path; 191 192 /** 193 * pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module 194 * 195 * This is an OpenSSL specific configuration option for configuring 196 * path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this 197 * module is not loaded. 198 */ 199 const char *pkcs11_module_path; 200 201 /** 202 * wps - WPS context data 203 * 204 * This is only used by EAP-WSC and can be left %NULL if not available. 205 */ 206 struct wps_context *wps; 207 208 /** 209 * eap_param_needed - Notify that EAP parameter is needed 210 * @ctx: Callback context (ctx) 211 * @field: Field name (e.g., "IDENTITY") 212 * @txt: User readable text describing the required parameter 213 */ 214 void (*eap_param_needed)(void *ctx, const char *field, 215 const char *txt); 216 217 /** 218 * port_cb - Set port authorized/unauthorized callback (optional) 219 * @ctx: Callback context (ctx) 220 * @authorized: Whether the supplicant port is now in authorized state 221 */ 222 void (*port_cb)(void *ctx, int authorized); 223 224 /** 225 * cert_cb - Notification of a peer certificate 226 * @ctx: Callback context (ctx) 227 * @depth: Depth in certificate chain (0 = server) 228 * @subject: Subject of the peer certificate 229 * @cert_hash: SHA-256 hash of the certificate 230 * @cert: Peer certificate 231 */ 232 void (*cert_cb)(void *ctx, int depth, const char *subject, 233 const char *cert_hash, const struct wpabuf *cert); 234 }; 235 236 237 struct eap_peer_config; 238 239 #ifdef IEEE8021X_EAPOL 240 struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx); 241 void eapol_sm_deinit(struct eapol_sm *sm); 242 void eapol_sm_step(struct eapol_sm *sm); 243 int eapol_sm_get_status(struct eapol_sm *sm, char *buf, size_t buflen, 244 int verbose); 245 int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, size_t buflen); 246 void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, int authPeriod, 247 int startPeriod, int maxStart); 248 int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, const u8 *buf, 249 size_t len); 250 void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm); 251 void eapol_sm_notify_portEnabled(struct eapol_sm *sm, Boolean enabled); 252 void eapol_sm_notify_portValid(struct eapol_sm *sm, Boolean valid); 253 void eapol_sm_notify_eap_success(struct eapol_sm *sm, Boolean success); 254 void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail); 255 void eapol_sm_notify_config(struct eapol_sm *sm, 256 struct eap_peer_config *config, 257 const struct eapol_config *conf); 258 int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len); 259 void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff); 260 void eapol_sm_notify_cached(struct eapol_sm *sm); 261 void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm, int attempt); 262 void eapol_sm_register_scard_ctx(struct eapol_sm *sm, void *ctx); 263 void eapol_sm_notify_portControl(struct eapol_sm *sm, PortControl portControl); 264 void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm); 265 void eapol_sm_notify_ctrl_response(struct eapol_sm *sm); 266 void eapol_sm_request_reauth(struct eapol_sm *sm); 267 void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, int in_eapol_sm); 268 void eapol_sm_invalidate_cached_session(struct eapol_sm *sm); 269 const char * eapol_sm_get_method_name(struct eapol_sm *sm); 270 #else /* IEEE8021X_EAPOL */ 271 static inline struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx) 272 { 273 free(ctx); 274 return (struct eapol_sm *) 1; 275 } 276 static inline void eapol_sm_deinit(struct eapol_sm *sm) 277 { 278 } 279 static inline void eapol_sm_step(struct eapol_sm *sm) 280 { 281 } 282 static inline int eapol_sm_get_status(struct eapol_sm *sm, char *buf, 283 size_t buflen, int verbose) 284 { 285 return 0; 286 } 287 static inline int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, 288 size_t buflen) 289 { 290 return 0; 291 } 292 static inline void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, 293 int authPeriod, int startPeriod, 294 int maxStart) 295 { 296 } 297 static inline int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, 298 const u8 *buf, size_t len) 299 { 300 return 0; 301 } 302 static inline void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm) 303 { 304 } 305 static inline void eapol_sm_notify_portEnabled(struct eapol_sm *sm, 306 Boolean enabled) 307 { 308 } 309 static inline void eapol_sm_notify_portValid(struct eapol_sm *sm, 310 Boolean valid) 311 { 312 } 313 static inline void eapol_sm_notify_eap_success(struct eapol_sm *sm, 314 Boolean success) 315 { 316 } 317 static inline void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail) 318 { 319 } 320 static inline void eapol_sm_notify_config(struct eapol_sm *sm, 321 struct eap_peer_config *config, 322 struct eapol_config *conf) 323 { 324 } 325 static inline int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len) 326 { 327 return -1; 328 } 329 static inline void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff) 330 { 331 } 332 static inline void eapol_sm_notify_cached(struct eapol_sm *sm) 333 { 334 } 335 #define eapol_sm_notify_pmkid_attempt(sm, attempt) do { } while (0) 336 #define eapol_sm_register_scard_ctx(sm, ctx) do { } while (0) 337 static inline void eapol_sm_notify_portControl(struct eapol_sm *sm, 338 PortControl portControl) 339 { 340 } 341 static inline void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm) 342 { 343 } 344 static inline void eapol_sm_notify_ctrl_response(struct eapol_sm *sm) 345 { 346 } 347 static inline void eapol_sm_request_reauth(struct eapol_sm *sm) 348 { 349 } 350 static inline void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, 351 int in_eapol_sm) 352 { 353 } 354 static inline void eapol_sm_invalidate_cached_session(struct eapol_sm *sm) 355 { 356 } 357 static inline const char * eapol_sm_get_method_name(struct eapol_sm *sm) 358 { 359 return NULL; 360 } 361 #endif /* IEEE8021X_EAPOL */ 362 363 #endif /* EAPOL_SUPP_SM_H */ 364
