/*
* EAP peer state machine functions (RFC 4137)
* Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#ifndef EAP_H
#define EAP_H
#include "common/defs.h"
#include "eap_common/eap_defs.h"
#include "eap_peer/eap_methods.h"
struct eap_sm;
struct wpa_config_blob;
struct wpabuf;
struct eap_method_type {
int vendor;
u32 method;
};
#ifdef IEEE8021X_EAPOL
/**
* enum eapol_bool_var - EAPOL boolean state variables for EAP state machine
*
* These variables are used in the interface between EAP peer state machine and
* lower layer. These are defined in RFC 4137, Sect. 4.1. Lower layer code is
* expected to maintain these variables and register a callback functions for
* EAP state machine to get and set the variables.
*/
enum eapol_bool_var {
/**
* EAPOL_eapSuccess - EAP SUCCESS state reached
*
* EAP state machine reads and writes this value.
*/
EAPOL_eapSuccess,
/**
* EAPOL_eapRestart - Lower layer request to restart authentication
*
* Set to TRUE in lower layer, FALSE in EAP state machine.
*/
EAPOL_eapRestart,
/**
* EAPOL_eapFail - EAP FAILURE state reached
*
* EAP state machine writes this value.
*/
EAPOL_eapFail,
/**
* EAPOL_eapResp - Response to send
*
* Set to TRUE in EAP state machine, FALSE in lower layer.
*/
EAPOL_eapResp,
/**
* EAPOL_eapNoResp - Request has been process; no response to send
*
* Set to TRUE in EAP state machine, FALSE in lower layer.
*/
EAPOL_eapNoResp,
/**
* EAPOL_eapReq - EAP request available from lower layer
*
* Set to TRUE in lower layer, FALSE in EAP state machine.
*/
EAPOL_eapReq,
/**
* EAPOL_portEnabled - Lower layer is ready for communication
*
* EAP state machines reads this value.
*/
EAPOL_portEnabled,
/**
* EAPOL_altAccept - Alternate indication of success (RFC3748)
*
* EAP state machines reads this value.
*/
EAPOL_altAccept,
/**
* EAPOL_altReject - Alternate indication of failure (RFC3748)
*
* EAP state machines reads this value.
*/
EAPOL_altReject
};
/**
* enum eapol_int_var - EAPOL integer state variables for EAP state machine
*
* These variables are used in the interface between EAP peer state machine and
* lower layer. These are defined in RFC 4137, Sect. 4.1. Lower layer code is
* expected to maintain these variables and register a callback functions for
* EAP state machine to get and set the variables.
*/
enum eapol_int_var {
/**
* EAPOL_idleWhile - Outside time for EAP peer timeout
*
* This integer variable is used to provide an outside timer that the
* external (to EAP state machine) code must decrement by one every
* second until the value reaches zero. This is used in the same way as
* EAPOL state machine timers. EAP state machine reads and writes this
* value.
*/
EAPOL_idleWhile
};
/**
* struct eapol_callbacks - Callback functions from EAP to lower layer
*
* This structure defines the callback functions that EAP state machine
* requires from the lower layer (usually EAPOL state machine) for updating
* state variables and requesting information. eapol_ctx from
* eap_peer_sm_init() call will be used as the ctx parameter for these
* callback functions.
*/
struct eapol_callbacks {
/**
* get_config - Get pointer to the current network configuration
* @ctx: eapol_ctx from eap_peer_sm_init() call
*/
struct eap_peer_config * (*get_config)(void *ctx);
/**
* get_bool - Get a boolean EAPOL state variable
* @variable: EAPOL boolean variable to get
* Returns: Value of the EAPOL variable
*/
Boolean (*get_bool)(void *ctx, enum eapol_bool_var variable);
/**
* set_bool - Set a boolean EAPOL state variable
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @variable: EAPOL boolean variable to set
* @value: Value for the EAPOL variable
*/
void (*set_bool)(void *ctx, enum eapol_bool_var variable,
Boolean value);
/**
* get_int - Get an integer EAPOL state variable
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @variable: EAPOL integer variable to get
* Returns: Value of the EAPOL variable
*/
unsigned int (*get_int)(void *ctx, enum eapol_int_var variable);
/**
* set_int - Set an integer EAPOL state variable
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @variable: EAPOL integer variable to set
* @value: Value for the EAPOL variable
*/
void (*set_int)(void *ctx, enum eapol_int_var variable,
unsigned int value);
/**
* get_eapReqData - Get EAP-Request data
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @len: Pointer to variable that will be set to eapReqDataLen
* Returns: Reference to eapReqData (EAP state machine will not free
* this) or %NULL if eapReqData not available.
*/
struct wpabuf * (*get_eapReqData)(void *ctx);
/**
* set_config_blob - Set named configuration blob
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @blob: New value for the blob
*
* Adds a new configuration blob or replaces the current value of an
* existing blob.
*/
void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob);
/**
* get_config_blob - Get a named configuration blob
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @name: Name of the blob
* Returns: Pointer to blob data or %NULL if not found
*/
const struct wpa_config_blob * (*get_config_blob)(void *ctx,
const char *name);
/**
* notify_pending - Notify that a pending request can be retried
* @ctx: eapol_ctx from eap_peer_sm_init() call
*
* An EAP method can perform a pending operation (e.g., to get a
* response from an external process). Once the response is available,
* this callback function can be used to request EAPOL state machine to
* retry delivering the previously received (and still unanswered) EAP
* request to EAP state machine.
*/
void (*notify_pending)(void *ctx);
/**
* eap_param_needed - Notify that EAP parameter is needed
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @field: Field name (e.g., "IDENTITY")
* @txt: User readable text describing the required parameter
*/
void (*eap_param_needed)(void *ctx, const char *field,
const char *txt);
/**
* notify_cert - Notification of a peer certificate
* @ctx: eapol_ctx from eap_peer_sm_init() call
* @depth: Depth in certificate chain (0 = server)
* @subject: Subject of the peer certificate
* @cert_hash: SHA-256 hash of the certificate
* @cert: Peer certificate
*/
void (*notify_cert)(void *ctx, int depth, const char *subject,
const char *cert_hash, const struct wpabuf *cert);
};
/**
* struct eap_config - Configuration for EAP state machine
*/
struct eap_config {
/**
* opensc_engine_path - OpenSC engine for OpenSSL engine support
*
* Usually, path to engine_opensc.so.
*/
const char *opensc_engine_path;
/**
* pkcs11_engine_path - PKCS#11 engine for OpenSSL engine support
*
* Usually, path to engine_pkcs11.so.
*/
const char *pkcs11_engine_path;
/**
* pkcs11_module_path - OpenSC PKCS#11 module for OpenSSL engine
*
* Usually, path to opensc-pkcs11.so.
*/
const char *pkcs11_module_path;
/**
* wps - WPS context data
*
* This is only used by EAP-WSC and can be left %NULL if not available.
*/
struct wps_context *wps;
};
struct eap_sm * eap_peer_sm_init(void *eapol_ctx,
struct eapol_callbacks *eapol_cb,
void *msg_ctx, struct eap_config *conf);
void eap_peer_sm_deinit(struct eap_sm *sm);
int eap_peer_sm_step(struct eap_sm *sm);
void eap_sm_abort(struct eap_sm *sm);
int eap_sm_get_status(struct eap_sm *sm, char *buf, size_t buflen,
int verbose);
const char * eap_sm_get_method_name(struct eap_sm *sm);
struct wpabuf * eap_sm_buildIdentity(struct eap_sm *sm, int id, int encrypted);
void eap_sm_request_identity(struct eap_sm *sm);
void eap_sm_request_password(struct eap_sm *sm);
void eap_sm_request_new_password(struct eap_sm *sm);
void eap_sm_request_pin(struct eap_sm *sm);
void eap_sm_request_otp(struct eap_sm *sm, const char *msg, size_t msg_len);
void eap_sm_request_passphrase(struct eap_sm *sm);
void eap_sm_notify_ctrl_attached(struct eap_sm *sm);
u32 eap_get_phase2_type(const char *name, int *vendor);
struct eap_method_type * eap_get_phase2_types(struct eap_peer_config *config,
size_t *count);
void eap_set_fast_reauth(struct eap_sm *sm, int enabled);
void eap_set_workaround(struct eap_sm *sm, unsigned int workaround);
void eap_set_force_disabled(struct eap_sm *sm, int disabled);
int eap_key_available(struct eap_sm *sm);
void eap_notify_success(struct eap_sm *sm);
void eap_notify_lower_layer_success(struct eap_sm *sm);
const u8 * eap_get_eapKeyData(struct eap_sm *sm, size_t *len);
struct wpabuf * eap_get_eapRespData(struct eap_sm *sm);
void eap_register_scard_ctx(struct eap_sm *sm, void *ctx);
void eap_invalidate_cached_session(struct eap_sm *sm);
int eap_is_wps_pbc_enrollee(struct eap_peer_config *conf);
int eap_is_wps_pin_enrollee(struct eap_peer_config *conf);
#endif /* IEEE8021X_EAPOL */
#endif /* EAP_H */