2 * EAP peer state machine functions (RFC 4137)
3 * Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "common/defs.h"
13 #include "eap_common/eap_defs.h"
14 #include "eap_peer/eap_methods.h"
21 struct wpa_config_blob;
24 struct eap_method_type {
29 #ifdef IEEE8021X_EAPOL
32 * enum eapol_bool_var - EAPOL boolean state variables for EAP state machine
34 * These variables are used in the interface between EAP peer state machine and
35 * lower layer. These are defined in RFC 4137, Sect. 4.1. Lower layer code is
36 * expected to maintain these variables and register a callback functions for
37 * EAP state machine to get and set the variables.
41 * EAPOL_eapSuccess - EAP SUCCESS state reached
43 * EAP state machine reads and writes this value.
48 * EAPOL_eapRestart - Lower layer request to restart authentication
50 * Set to TRUE in lower layer, FALSE in EAP state machine.
55 * EAPOL_eapFail - EAP FAILURE state reached
57 * EAP state machine writes this value.
62 * EAPOL_eapResp - Response to send
64 * Set to TRUE in EAP state machine, FALSE in lower layer.
69 * EAPOL_eapNoResp - Request has been process; no response to send
71 * Set to TRUE in EAP state machine, FALSE in lower layer.
76 * EAPOL_eapReq - EAP request available from lower layer
78 * Set to TRUE in lower layer, FALSE in EAP state machine.
83 * EAPOL_portEnabled - Lower layer is ready for communication
85 * EAP state machines reads this value.
90 * EAPOL_altAccept - Alternate indication of success (RFC3748)
92 * EAP state machines reads this value.
97 * EAPOL_altReject - Alternate indication of failure (RFC3748)
99 * EAP state machines reads this value.
104 * EAPOL_eapTriggerStart - EAP-based trigger to send EAPOL-Start
106 * EAP state machine writes this value.
108 EAPOL_eapTriggerStart
112 * enum eapol_int_var - EAPOL integer state variables for EAP state machine
114 * These variables are used in the interface between EAP peer state machine and
115 * lower layer. These are defined in RFC 4137, Sect. 4.1. Lower layer code is
116 * expected to maintain these variables and register a callback functions for
117 * EAP state machine to get and set the variables.
121 * EAPOL_idleWhile - Outside time for EAP peer timeout
123 * This integer variable is used to provide an outside timer that the
124 * external (to EAP state machine) code must decrement by one every
125 * second until the value reaches zero. This is used in the same way as
126 * EAPOL state machine timers. EAP state machine reads and writes this
133 * struct eapol_callbacks - Callback functions from EAP to lower layer
135 * This structure defines the callback functions that EAP state machine
136 * requires from the lower layer (usually EAPOL state machine) for updating
137 * state variables and requesting information. eapol_ctx from
138 * eap_peer_sm_init() call will be used as the ctx parameter for these
139 * callback functions.
141 struct eapol_callbacks {
143 * get_config - Get pointer to the current network configuration
144 * @ctx: eapol_ctx from eap_peer_sm_init() call
146 struct eap_peer_config * (*get_config)(void *ctx);
149 * get_bool - Get a boolean EAPOL state variable
150 * @variable: EAPOL boolean variable to get
151 * Returns: Value of the EAPOL variable
153 Boolean (*get_bool)(void *ctx, enum eapol_bool_var variable);
156 * set_bool - Set a boolean EAPOL state variable
157 * @ctx: eapol_ctx from eap_peer_sm_init() call
158 * @variable: EAPOL boolean variable to set
159 * @value: Value for the EAPOL variable
161 void (*set_bool)(void *ctx, enum eapol_bool_var variable,
165 * get_int - Get an integer EAPOL state variable
166 * @ctx: eapol_ctx from eap_peer_sm_init() call
167 * @variable: EAPOL integer variable to get
168 * Returns: Value of the EAPOL variable
170 unsigned int (*get_int)(void *ctx, enum eapol_int_var variable);
173 * set_int - Set an integer EAPOL state variable
174 * @ctx: eapol_ctx from eap_peer_sm_init() call
175 * @variable: EAPOL integer variable to set
176 * @value: Value for the EAPOL variable
178 void (*set_int)(void *ctx, enum eapol_int_var variable,
182 * get_eapReqData - Get EAP-Request data
183 * @ctx: eapol_ctx from eap_peer_sm_init() call
184 * @len: Pointer to variable that will be set to eapReqDataLen
185 * Returns: Reference to eapReqData (EAP state machine will not free
186 * this) or %NULL if eapReqData not available.
188 struct wpabuf * (*get_eapReqData)(void *ctx);
191 * set_config_blob - Set named configuration blob
192 * @ctx: eapol_ctx from eap_peer_sm_init() call
193 * @blob: New value for the blob
195 * Adds a new configuration blob or replaces the current value of an
198 void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob);
201 * get_config_blob - Get a named configuration blob
202 * @ctx: eapol_ctx from eap_peer_sm_init() call
203 * @name: Name of the blob
204 * Returns: Pointer to blob data or %NULL if not found
206 const struct wpa_config_blob * (*get_config_blob)(void *ctx,
210 * notify_pending - Notify that a pending request can be retried
211 * @ctx: eapol_ctx from eap_peer_sm_init() call
213 * An EAP method can perform a pending operation (e.g., to get a
214 * response from an external process). Once the response is available,
215 * this callback function can be used to request EAPOL state machine to
216 * retry delivering the previously received (and still unanswered) EAP
217 * request to EAP state machine.
219 void (*notify_pending)(void *ctx);
222 * eap_param_needed - Notify that EAP parameter is needed
223 * @ctx: eapol_ctx from eap_peer_sm_init() call
224 * @field: Field indicator (e.g., WPA_CTRL_REQ_EAP_IDENTITY)
225 * @txt: User readable text describing the required parameter
227 void (*eap_param_needed)(void *ctx, enum wpa_ctrl_req_type field,
231 * notify_cert - Notification of a peer certificate
232 * @ctx: eapol_ctx from eap_peer_sm_init() call
233 * @depth: Depth in certificate chain (0 = server)
234 * @subject: Subject of the peer certificate
235 * @altsubject: Select fields from AltSubject of the peer certificate
236 * @num_altsubject: Number of altsubject values
237 * @cert_hash: SHA-256 hash of the certificate
238 * @cert: Peer certificate
240 void (*notify_cert)(void *ctx, int depth, const char *subject,
241 const char *altsubject[], int num_altsubject,
242 const char *cert_hash, const struct wpabuf *cert);
245 * notify_status - Notification of the current EAP state
246 * @ctx: eapol_ctx from eap_peer_sm_init() call
247 * @status: Step in the process of EAP authentication
248 * @parameter: Step-specific parameter, e.g., EAP method name
250 void (*notify_status)(void *ctx, const char *status,
251 const char *parameter);
253 #ifdef CONFIG_EAP_PROXY
255 * eap_proxy_cb - Callback signifying any updates from eap_proxy
256 * @ctx: eapol_ctx from eap_peer_sm_init() call
258 void (*eap_proxy_cb)(void *ctx);
259 #endif /* CONFIG_EAP_PROXY */
262 * set_anon_id - Set or add anonymous identity
263 * @ctx: eapol_ctx from eap_peer_sm_init() call
264 * @id: Anonymous identity (e.g., EAP-SIM pseudonym) or %NULL to clear
265 * @len: Length of anonymous identity in octets
267 void (*set_anon_id)(void *ctx, const u8 *id, size_t len);
271 * struct eap_config - Configuration for EAP state machine
275 * opensc_engine_path - OpenSC engine for OpenSSL engine support
277 * Usually, path to engine_opensc.so.
279 const char *opensc_engine_path;
281 * pkcs11_engine_path - PKCS#11 engine for OpenSSL engine support
283 * Usually, path to engine_pkcs11.so.
285 const char *pkcs11_engine_path;
287 * pkcs11_module_path - OpenSC PKCS#11 module for OpenSSL engine
289 * Usually, path to opensc-pkcs11.so.
291 const char *pkcs11_module_path;
293 * openssl_ciphers - OpenSSL cipher string
295 * This is an OpenSSL specific configuration option for configuring the
296 * default ciphers. If not set, "DEFAULT:!EXP:!LOW" is used as the
299 const char *openssl_ciphers;
301 * wps - WPS context data
303 * This is only used by EAP-WSC and can be left %NULL if not available.
305 struct wps_context *wps;
308 * cert_in_cb - Include server certificates in callback
313 struct eap_sm * eap_peer_sm_init(void *eapol_ctx,
314 const struct eapol_callbacks *eapol_cb,
315 void *msg_ctx, struct eap_config *conf);
316 void eap_peer_sm_deinit(struct eap_sm *sm);
317 int eap_peer_sm_step(struct eap_sm *sm);
318 void eap_sm_abort(struct eap_sm *sm);
319 int eap_sm_get_status(struct eap_sm *sm, char *buf, size_t buflen,
321 const char * eap_sm_get_method_name(struct eap_sm *sm);
322 struct wpabuf * eap_sm_buildIdentity(struct eap_sm *sm, int id, int encrypted);
323 void eap_sm_request_identity(struct eap_sm *sm);
324 void eap_sm_request_password(struct eap_sm *sm);
325 void eap_sm_request_new_password(struct eap_sm *sm);
326 void eap_sm_request_pin(struct eap_sm *sm);
327 void eap_sm_request_otp(struct eap_sm *sm, const char *msg, size_t msg_len);
328 void eap_sm_request_passphrase(struct eap_sm *sm);
329 void eap_sm_request_sim(struct eap_sm *sm, const char *req);
330 void eap_sm_notify_ctrl_attached(struct eap_sm *sm);
331 u32 eap_get_phase2_type(const char *name, int *vendor);
332 struct eap_method_type * eap_get_phase2_types(struct eap_peer_config *config,
334 void eap_set_fast_reauth(struct eap_sm *sm, int enabled);
335 void eap_set_workaround(struct eap_sm *sm, unsigned int workaround);
336 void eap_set_force_disabled(struct eap_sm *sm, int disabled);
337 void eap_set_external_sim(struct eap_sm *sm, int external_sim);
338 int eap_key_available(struct eap_sm *sm);
339 void eap_notify_success(struct eap_sm *sm);
340 void eap_notify_lower_layer_success(struct eap_sm *sm);
341 const u8 * eap_get_eapSessionId(struct eap_sm *sm, size_t *len);
342 const u8 * eap_get_eapKeyData(struct eap_sm *sm, size_t *len);
343 struct wpabuf * eap_get_eapRespData(struct eap_sm *sm);
344 void eap_register_scard_ctx(struct eap_sm *sm, void *ctx);
345 void eap_invalidate_cached_session(struct eap_sm *sm);
347 int eap_is_wps_pbc_enrollee(struct eap_peer_config *conf);
348 int eap_is_wps_pin_enrollee(struct eap_peer_config *conf);
350 struct ext_password_data;
351 void eap_sm_set_ext_pw_ctx(struct eap_sm *sm, struct ext_password_data *ext);
352 void eap_set_anon_id(struct eap_sm *sm, const u8 *id, size_t len);
353 int eap_peer_was_failure_expected(struct eap_sm *sm);
354 void eap_peer_erp_free_keys(struct eap_sm *sm);
356 #endif /* IEEE8021X_EAPOL */