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313 lines
9.0 KiB
C
313 lines
9.0 KiB
C
/*
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* WPA Supplicant / EAPOL state machines
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* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef EAPOL_SM_H
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#define EAPOL_SM_H
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#include "defs.h"
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typedef enum { Unauthorized, Authorized } PortStatus;
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typedef enum { Auto, ForceUnauthorized, ForceAuthorized } PortControl;
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/**
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* struct eapol_config - Per network configuration for EAPOL state machines
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*/
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struct eapol_config {
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/**
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* accept_802_1x_keys - Accept IEEE 802.1X (non-WPA) EAPOL-Key frames
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*
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* This variable should be set to 1 when using EAPOL state machines
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* with non-WPA security policy to generate dynamic WEP keys. When
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* using WPA, this should be set to 0 so that WPA state machine can
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* process the EAPOL-Key frames.
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*/
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int accept_802_1x_keys;
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#define EAPOL_REQUIRE_KEY_UNICAST BIT(0)
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#define EAPOL_REQUIRE_KEY_BROADCAST BIT(1)
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/**
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* required_keys - Which EAPOL-Key packets are required
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*
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* This variable determines which EAPOL-Key packets are required before
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* marking connection authenticated. This is a bit field of
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* EAPOL_REQUIRE_KEY_UNICAST and EAPOL_REQUIRE_KEY_BROADCAST flags.
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*/
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int required_keys;
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/**
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* fast_reauth - Whether fast EAP reauthentication is enabled
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*/
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int fast_reauth;
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/**
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* workaround - Whether EAP workarounds are enabled
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*/
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unsigned int workaround;
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/**
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* eap_disabled - Whether EAP is disabled
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*/
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int eap_disabled;
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};
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struct eapol_sm;
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struct wpa_config_blob;
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/**
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* struct eapol_ctx - Global (for all networks) EAPOL state machine context
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*/
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struct eapol_ctx {
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/**
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* ctx - Pointer to arbitrary upper level context
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*/
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void *ctx;
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/**
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* preauth - IEEE 802.11i/RSN pre-authentication
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*
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* This EAPOL state machine is used for IEEE 802.11i/RSN
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* pre-authentication
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*/
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int preauth;
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/**
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* cb - Function to be called when EAPOL negotiation has been completed
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* @eapol: Pointer to EAPOL state machine data
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* @success: Whether the authentication was completed successfully
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* @ctx: Pointer to context data (cb_ctx)
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*
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* This optional callback function will be called when the EAPOL
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* authentication has been completed. This allows the owner of the
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* EAPOL state machine to process the key and terminate the EAPOL state
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* machine. Currently, this is used only in RSN pre-authentication.
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*/
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void (*cb)(struct eapol_sm *eapol, int success, void *ctx);
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/**
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* cb_ctx - Callback context for cb()
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*/
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void *cb_ctx;
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/**
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* msg_ctx - Callback context for wpa_msg() calls
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*/
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void *msg_ctx;
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/**
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* scard_ctx - Callback context for PC/SC scard_*() function calls
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*
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* This context can be updated with eapol_sm_register_scard_ctx().
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*/
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void *scard_ctx;
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/**
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* eapol_send_ctx - Callback context for eapol_send() calls
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*/
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void *eapol_send_ctx;
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/**
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* eapol_done_cb - Function to be called at successful completion
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* @ctx: Callback context (ctx)
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*
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* This function is called at the successful completion of EAPOL
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* authentication. If dynamic WEP keys are used, this is called only
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* after all the expected keys have been received.
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*/
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void (*eapol_done_cb)(void *ctx);
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/**
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* eapol_send - Send EAPOL packets
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* @ctx: Callback context (eapol_send_ctx)
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* @type: EAPOL type (IEEE802_1X_TYPE_*)
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* @buf: Pointer to EAPOL payload
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* @len: Length of the EAPOL payload
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* Returns: 0 on success, -1 on failure
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*/
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int (*eapol_send)(void *ctx, int type, const u8 *buf, size_t len);
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/**
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* set_wep_key - Configure WEP keys
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* @ctx: Callback context (ctx)
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* @unicast: Non-zero = unicast, 0 = multicast/broadcast key
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* @keyidx: Key index (0..3)
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* @key: WEP key
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* @keylen: Length of the WEP key
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* Returns: 0 on success, -1 on failure
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*/
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int (*set_wep_key)(void *ctx, int unicast, int keyidx,
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const u8 *key, size_t keylen);
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/**
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* set_config_blob - Set or add a named configuration blob
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* @ctx: Callback context (ctx)
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* @blob: New value for the blob
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*
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* Adds a new configuration blob or replaces the current value of an
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* existing blob.
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*/
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void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob);
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/**
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* get_config_blob - Get a named configuration blob
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* @ctx: Callback context (ctx)
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* @name: Name of the blob
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* Returns: Pointer to blob data or %NULL if not found
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*/
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const struct wpa_config_blob * (*get_config_blob)(void *ctx,
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const char *name);
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/**
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* opensc_engine_path - Path to the OpenSSL engine for opensc
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*
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* This is an OpenSSL specific configuration option for loading OpenSC
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* engine (engine_opensc.so); if %NULL, this engine is not loaded.
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*/
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const char *opensc_engine_path;
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/**
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* pkcs11_engine_path - Path to the OpenSSL engine for PKCS#11
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*
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* This is an OpenSSL specific configuration option for loading PKCS#11
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* engine (engine_pkcs11.so); if %NULL, this engine is not loaded.
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*/
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const char *pkcs11_engine_path;
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/**
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* pkcs11_module_path - Path to the OpenSSL OpenSC/PKCS#11 module
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*
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* This is an OpenSSL specific configuration option for configuring
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* path to OpenSC/PKCS#11 engine (opensc-pkcs11.so); if %NULL, this
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* module is not loaded.
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*/
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const char *pkcs11_module_path;
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};
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struct wpa_ssid;
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#ifdef IEEE8021X_EAPOL
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struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx);
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void eapol_sm_deinit(struct eapol_sm *sm);
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void eapol_sm_step(struct eapol_sm *sm);
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int eapol_sm_get_status(struct eapol_sm *sm, char *buf, size_t buflen,
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int verbose);
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int eapol_sm_get_mib(struct eapol_sm *sm, char *buf, size_t buflen);
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void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod, int authPeriod,
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int startPeriod, int maxStart);
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int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src, const u8 *buf,
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size_t len);
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void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm);
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void eapol_sm_notify_portEnabled(struct eapol_sm *sm, Boolean enabled);
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void eapol_sm_notify_portValid(struct eapol_sm *sm, Boolean valid);
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void eapol_sm_notify_eap_success(struct eapol_sm *sm, Boolean success);
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void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail);
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void eapol_sm_notify_config(struct eapol_sm *sm, struct wpa_ssid *config,
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const struct eapol_config *conf);
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int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len);
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void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff);
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void eapol_sm_notify_cached(struct eapol_sm *sm);
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void eapol_sm_notify_pmkid_attempt(struct eapol_sm *sm, int attempt);
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void eapol_sm_register_scard_ctx(struct eapol_sm *sm, void *ctx);
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void eapol_sm_notify_portControl(struct eapol_sm *sm, PortControl portControl);
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void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm);
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void eapol_sm_notify_ctrl_response(struct eapol_sm *sm);
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void eapol_sm_request_reauth(struct eapol_sm *sm);
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void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm);
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#else /* IEEE8021X_EAPOL */
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static inline struct eapol_sm *eapol_sm_init(struct eapol_ctx *ctx)
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{
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free(ctx);
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return (struct eapol_sm *) 1;
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}
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static inline void eapol_sm_deinit(struct eapol_sm *sm)
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{
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}
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static inline void eapol_sm_step(struct eapol_sm *sm)
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{
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}
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static inline int eapol_sm_get_status(struct eapol_sm *sm, char *buf,
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size_t buflen, int verbose)
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{
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return 0;
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}
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static inline int eapol_sm_get_mib(struct eapol_sm *sm, char *buf,
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size_t buflen)
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{
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return 0;
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}
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static inline void eapol_sm_configure(struct eapol_sm *sm, int heldPeriod,
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int authPeriod, int startPeriod,
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int maxStart)
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{
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}
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static inline int eapol_sm_rx_eapol(struct eapol_sm *sm, const u8 *src,
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const u8 *buf, size_t len)
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{
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return 0;
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}
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static inline void eapol_sm_notify_tx_eapol_key(struct eapol_sm *sm)
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{
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}
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static inline void eapol_sm_notify_portEnabled(struct eapol_sm *sm,
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Boolean enabled)
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{
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}
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static inline void eapol_sm_notify_portValid(struct eapol_sm *sm,
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Boolean valid)
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{
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}
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static inline void eapol_sm_notify_eap_success(struct eapol_sm *sm,
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Boolean success)
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{
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}
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static inline void eapol_sm_notify_eap_fail(struct eapol_sm *sm, Boolean fail)
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{
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}
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static inline void eapol_sm_notify_config(struct eapol_sm *sm,
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struct wpa_ssid *config,
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struct eapol_config *conf)
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{
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}
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static inline int eapol_sm_get_key(struct eapol_sm *sm, u8 *key, size_t len)
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{
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return -1;
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}
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static inline void eapol_sm_notify_logoff(struct eapol_sm *sm, Boolean logoff)
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{
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}
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static inline void eapol_sm_notify_cached(struct eapol_sm *sm)
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{
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}
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#define eapol_sm_notify_pmkid_attempt(sm, attempt) do { } while (0)
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#define eapol_sm_register_scard_ctx(sm, ctx) do { } while (0)
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static inline void eapol_sm_notify_portControl(struct eapol_sm *sm,
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PortControl portControl)
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{
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}
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static inline void eapol_sm_notify_ctrl_attached(struct eapol_sm *sm)
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{
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}
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static inline void eapol_sm_notify_ctrl_response(struct eapol_sm *sm)
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{
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}
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static inline void eapol_sm_request_reauth(struct eapol_sm *sm)
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{
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}
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static inline void eapol_sm_notify_lower_layer_success(struct eapol_sm *sm)
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{
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}
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#endif /* IEEE8021X_EAPOL */
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#endif /* EAPOL_SM_H */
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