src/eapol_supp/eapol_supp_sm.h

   1 /*
   2  * EAPOL supplicant state machines
   3  * Copyright (c) 2004-2008, 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 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 */