src/eapol_supp/eapol_supp_sm.h

   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 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 void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff);
 289 void eapol_sm_notify_cached(struct eapol_sm *sm);
 290 void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm, int attempt);
 291 void eapol_sm_register_scard_ctx(struct eapol_sm *sm, void *ctx);
 292 void eapol_sm_notify_portControl(struct eapol_sm *sm, PortControl portControl);
 293 void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm);
 294 void eapol_sm_notify_ctrl_response(struct eapol_sm *sm);
 295 void eapol_sm_request_reauth(struct eapol_sm *sm);
 296 void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm, int in_eapol_sm);
 297 void eapol_sm_invalidate_cached_session(struct eapol_sm *sm);
 298 const char * eapol_sm_get_method_name(struct eapol_sm *sm);
 299 void eapol_sm_set_ext_pw_ctx(struct eapol_sm *sm,
 300                              struct ext_password_data *ext);
 301 int eapol_sm_failed(struct eapol_sm *sm);
 302 int eapol_sm_get_eap_proxy_imsi(struct eapol_sm *sm, char *imsi, size_t *len);
 303 #else /* IEEE8021X_EAPOL */
 304 static inline struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx)
 305 {
 306         free(ctx);
 307         return (struct eapol_sm *) 1;
 308 }
 309 static inline void eapol_sm_deinit(struct eapol_sm *sm)
 310 {
 311 }
 312 static inline void eapol_sm_step(struct eapol_sm *sm)
 313 {
 314 }
 315 static inline int eapol_sm_get_status(struct eapol_sm *sm, char *buf,
 316                                       size_t buflen, int verbose)
 317 {
 318         return 0;
 319 }
 320 static inline int eapol_sm_get_mib(struct eapol_sm *sm, char *buf,
 321                                    size_t buflen)
 322 {
 323         return 0;
 324 }
 325 static inline void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod,
 326                                       int authPeriod, int startPeriod,
 327                                       int maxStart)
 328 {
 329 }
 330 static inline int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src,
 331                                     const u8 *buf, size_t len)
 332 {
 333         return 0;
 334 }
 335 static inline void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm)
 336 {
 337 }
 338 static inline void eapol_sm_notify_portEnabled(struct eapol_sm *sm,
 339                                                Boolean enabled)
 340 {
 341 }
 342 static inline void eapol_sm_notify_portValid(struct eapol_sm *sm,
 343                                              Boolean valid)
 344 {
 345 }
 346 static inline void eapol_sm_notify_eap_success(struct eapol_sm *sm,
 347                                                Boolean success)
 348 {
 349 }
 350 static inline void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail)
 351 {
 352 }
 353 static inline void eapol_sm_notify_config(struct eapol_sm *sm,
 354                                           struct eap_peer_config *config,
 355                                           struct eapol_config *conf)
 356 {
 357 }
 358 static inline int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len)
 359 {
 360         return -1;
 361 }
 362 static inline void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff)
 363 {
 364 }
 365 static inline void eapol_sm_notify_cached(struct eapol_sm *sm)
 366 {
 367 }
 368 #define eapol_sm_notify_pmkid_attempt(sm, attempt) do { } while (0)
 369 #define eapol_sm_register_scard_ctx(sm, ctx) do { } while (0)
 370 static inline void eapol_sm_notify_portControl(struct eapol_sm *sm,
 371                                                PortControl portControl)
 372 {
 373 }
 374 static inline void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm)
 375 {
 376 }
 377 static inline void eapol_sm_notify_ctrl_response(struct eapol_sm *sm)
 378 {
 379 }
 380 static inline void eapol_sm_request_reauth(struct eapol_sm *sm)
 381 {
 382 }
 383 static inline void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm,
 384                                                        int in_eapol_sm)
 385 {
 386 }
 387 static inline void eapol_sm_invalidate_cached_session(struct eapol_sm *sm)
 388 {
 389 }
 390 static inline const char * eapol_sm_get_method_name(struct eapol_sm *sm)
 391 {
 392         return NULL;
 393 }
 394 static inline void eapol_sm_set_ext_pw_ctx(struct eapol_sm *sm,
 395                                            struct ext_password_data *ext)
 396 {
 397 }
 398 static inline int eapol_sm_failed(struct eapol_sm *sm)
 399 {
 400         return 0;
 401 }
 402 #endif /* IEEE8021X_EAPOL */
 403
 404 #endif /* EAPOL_SUPP_SM_H */