mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-11-29 02:38:22 -05:00
f55802e8bf
With this change, eapol_sm.c does not need to dereference main hostapd structures anymore (i.e., hostapd.h is not needed to be included).
255 lines
7.6 KiB
C
255 lines
7.6 KiB
C
/*
|
|
* hostapd / IEEE 802.1X-2004 Authenticator - EAPOL state machine
|
|
* Copyright (c) 2002-2007, 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 EAPOL_SM_H
|
|
#define EAPOL_SM_H
|
|
|
|
#include "defs.h"
|
|
#include "radius/radius.h"
|
|
|
|
/* IEEE Std 802.1X-2004, Ch. 8.2 */
|
|
|
|
typedef enum { ForceUnauthorized = 1, ForceAuthorized = 3, Auto = 2 }
|
|
PortTypes;
|
|
typedef enum { Unauthorized = 2, Authorized = 1 } PortState;
|
|
typedef enum { Both = 0, In = 1 } ControlledDirection;
|
|
typedef unsigned int Counter;
|
|
|
|
struct eap_sm;
|
|
|
|
|
|
struct eapol_auth_config {
|
|
int eap_reauth_period;
|
|
int wpa;
|
|
int individual_wep_key_len;
|
|
int eap_server;
|
|
void *ssl_ctx;
|
|
void *eap_sim_db_priv;
|
|
char *eap_req_id_text; /* a copy of this will be allocated */
|
|
size_t eap_req_id_text_len;
|
|
u8 *pac_opaque_encr_key;
|
|
u8 *eap_fast_a_id;
|
|
size_t eap_fast_a_id_len;
|
|
char *eap_fast_a_id_info;
|
|
int eap_fast_prov;
|
|
int pac_key_lifetime;
|
|
int pac_key_refresh_time;
|
|
int eap_sim_aka_result_ind;
|
|
int tnc;
|
|
struct wps_context *wps;
|
|
|
|
/*
|
|
* Pointer to hostapd data. This is a temporary workaround for
|
|
* transition phase and will be removed once IEEE 802.1X/EAPOL code is
|
|
* separated more cleanly from rest of hostapd.
|
|
*/
|
|
struct hostapd_data *hapd;
|
|
};
|
|
|
|
struct eap_user;
|
|
|
|
typedef enum {
|
|
EAPOL_LOGGER_DEBUG, EAPOL_LOGGER_INFO, EAPOL_LOGGER_WARNING
|
|
} eapol_logger_level;
|
|
|
|
struct eapol_auth_cb {
|
|
void (*eapol_send)(void *ctx, void *sta_ctx, u8 type, const u8 *data,
|
|
size_t datalen);
|
|
void (*aaa_send)(void *ctx, void *sta_ctx, const u8 *data,
|
|
size_t datalen);
|
|
void (*finished)(void *ctx, void *sta_ctx, int success, int preauth);
|
|
int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
|
|
int phase2, struct eap_user *user);
|
|
int (*sta_entry_alive)(void *ctx, const u8 *addr);
|
|
void (*logger)(void *ctx, const u8 *addr, eapol_logger_level level,
|
|
const char *txt);
|
|
void (*set_port_authorized)(void *ctx, void *sta_ctx, int authorized);
|
|
void (*abort_auth)(void *ctx, void *sta_ctx);
|
|
void (*tx_key)(void *ctx, void *sta_ctx);
|
|
};
|
|
|
|
/**
|
|
* struct eapol_authenticator - Global EAPOL authenticator data
|
|
*/
|
|
struct eapol_authenticator {
|
|
struct eapol_auth_config conf;
|
|
struct eapol_auth_cb cb;
|
|
|
|
u8 *default_wep_key;
|
|
u8 default_wep_key_idx;
|
|
};
|
|
|
|
|
|
/**
|
|
* struct eapol_state_machine - Per-Supplicant Authenticator state machines
|
|
*/
|
|
struct eapol_state_machine {
|
|
/* timers */
|
|
int aWhile;
|
|
int quietWhile;
|
|
int reAuthWhen;
|
|
|
|
/* global variables */
|
|
Boolean authAbort;
|
|
Boolean authFail;
|
|
PortState authPortStatus;
|
|
Boolean authStart;
|
|
Boolean authTimeout;
|
|
Boolean authSuccess;
|
|
Boolean eapolEap;
|
|
Boolean initialize;
|
|
Boolean keyDone;
|
|
Boolean keyRun;
|
|
Boolean keyTxEnabled;
|
|
PortTypes portControl;
|
|
Boolean portValid;
|
|
Boolean reAuthenticate;
|
|
|
|
/* Port Timers state machine */
|
|
/* 'Boolean tick' implicitly handled as registered timeout */
|
|
|
|
/* Authenticator PAE state machine */
|
|
enum { AUTH_PAE_INITIALIZE, AUTH_PAE_DISCONNECTED, AUTH_PAE_CONNECTING,
|
|
AUTH_PAE_AUTHENTICATING, AUTH_PAE_AUTHENTICATED,
|
|
AUTH_PAE_ABORTING, AUTH_PAE_HELD, AUTH_PAE_FORCE_AUTH,
|
|
AUTH_PAE_FORCE_UNAUTH, AUTH_PAE_RESTART } auth_pae_state;
|
|
/* variables */
|
|
Boolean eapolLogoff;
|
|
Boolean eapolStart;
|
|
PortTypes portMode;
|
|
unsigned int reAuthCount;
|
|
/* constants */
|
|
unsigned int quietPeriod; /* default 60; 0..65535 */
|
|
#define AUTH_PAE_DEFAULT_quietPeriod 60
|
|
unsigned int reAuthMax; /* default 2 */
|
|
#define AUTH_PAE_DEFAULT_reAuthMax 2
|
|
/* counters */
|
|
Counter authEntersConnecting;
|
|
Counter authEapLogoffsWhileConnecting;
|
|
Counter authEntersAuthenticating;
|
|
Counter authAuthSuccessesWhileAuthenticating;
|
|
Counter authAuthTimeoutsWhileAuthenticating;
|
|
Counter authAuthFailWhileAuthenticating;
|
|
Counter authAuthEapStartsWhileAuthenticating;
|
|
Counter authAuthEapLogoffWhileAuthenticating;
|
|
Counter authAuthReauthsWhileAuthenticated;
|
|
Counter authAuthEapStartsWhileAuthenticated;
|
|
Counter authAuthEapLogoffWhileAuthenticated;
|
|
|
|
/* Backend Authentication state machine */
|
|
enum { BE_AUTH_REQUEST, BE_AUTH_RESPONSE, BE_AUTH_SUCCESS,
|
|
BE_AUTH_FAIL, BE_AUTH_TIMEOUT, BE_AUTH_IDLE, BE_AUTH_INITIALIZE,
|
|
BE_AUTH_IGNORE
|
|
} be_auth_state;
|
|
/* constants */
|
|
unsigned int serverTimeout; /* default 30; 1..X */
|
|
#define BE_AUTH_DEFAULT_serverTimeout 30
|
|
/* counters */
|
|
Counter backendResponses;
|
|
Counter backendAccessChallenges;
|
|
Counter backendOtherRequestsToSupplicant;
|
|
Counter backendAuthSuccesses;
|
|
Counter backendAuthFails;
|
|
|
|
/* Reauthentication Timer state machine */
|
|
enum { REAUTH_TIMER_INITIALIZE, REAUTH_TIMER_REAUTHENTICATE
|
|
} reauth_timer_state;
|
|
/* constants */
|
|
unsigned int reAuthPeriod; /* default 3600 s */
|
|
Boolean reAuthEnabled;
|
|
|
|
/* Authenticator Key Transmit state machine */
|
|
enum { AUTH_KEY_TX_NO_KEY_TRANSMIT, AUTH_KEY_TX_KEY_TRANSMIT
|
|
} auth_key_tx_state;
|
|
|
|
/* Key Receive state machine */
|
|
enum { KEY_RX_NO_KEY_RECEIVE, KEY_RX_KEY_RECEIVE } key_rx_state;
|
|
/* variables */
|
|
Boolean rxKey;
|
|
|
|
/* Controlled Directions state machine */
|
|
enum { CTRL_DIR_FORCE_BOTH, CTRL_DIR_IN_OR_BOTH } ctrl_dir_state;
|
|
/* variables */
|
|
ControlledDirection adminControlledDirections;
|
|
ControlledDirection operControlledDirections;
|
|
Boolean operEdge;
|
|
|
|
/* Authenticator Statistics Table */
|
|
Counter dot1xAuthEapolFramesRx;
|
|
Counter dot1xAuthEapolFramesTx;
|
|
Counter dot1xAuthEapolStartFramesRx;
|
|
Counter dot1xAuthEapolLogoffFramesRx;
|
|
Counter dot1xAuthEapolRespIdFramesRx;
|
|
Counter dot1xAuthEapolRespFramesRx;
|
|
Counter dot1xAuthEapolReqIdFramesTx;
|
|
Counter dot1xAuthEapolReqFramesTx;
|
|
Counter dot1xAuthInvalidEapolFramesRx;
|
|
Counter dot1xAuthEapLengthErrorFramesRx;
|
|
Counter dot1xAuthLastEapolFrameVersion;
|
|
|
|
/* Other variables - not defined in IEEE 802.1X */
|
|
u8 addr[ETH_ALEN]; /* Supplicant address */
|
|
#define EAPOL_SM_PREAUTH BIT(0)
|
|
#define EAPOL_SM_WAIT_START BIT(1)
|
|
int flags; /* EAPOL_SM_* */
|
|
|
|
/* EAPOL/AAA <-> EAP full authenticator interface */
|
|
struct eap_eapol_interface *eap_if;
|
|
|
|
int radius_identifier;
|
|
/* TODO: check when the last messages can be released */
|
|
struct radius_msg *last_recv_radius;
|
|
u8 last_eap_id; /* last used EAP Identifier */
|
|
u8 *identity;
|
|
size_t identity_len;
|
|
u8 eap_type_authsrv; /* EAP type of the last EAP packet from
|
|
* Authentication server */
|
|
u8 eap_type_supp; /* EAP type of the last EAP packet from Supplicant */
|
|
struct radius_class_data radius_class;
|
|
|
|
/* Keys for encrypting and signing EAPOL-Key frames */
|
|
u8 *eapol_key_sign;
|
|
size_t eapol_key_sign_len;
|
|
u8 *eapol_key_crypt;
|
|
size_t eapol_key_crypt_len;
|
|
|
|
struct eap_sm *eap;
|
|
|
|
Boolean initializing; /* in process of initializing state machines */
|
|
Boolean changed;
|
|
|
|
struct eapol_authenticator *eapol;
|
|
|
|
/* Somewhat nasty pointers to global hostapd and STA data to avoid
|
|
* passing these to every function */
|
|
struct hostapd_data *hapd;
|
|
struct sta_info *sta;
|
|
};
|
|
|
|
|
|
struct eapol_authenticator * eapol_auth_init(struct eapol_auth_config *conf,
|
|
struct eapol_auth_cb *cb);
|
|
void eapol_auth_deinit(struct eapol_authenticator *eapol);
|
|
struct eapol_state_machine *
|
|
eapol_auth_alloc(struct eapol_authenticator *eapol, const u8 *addr,
|
|
int preauth, struct sta_info *sta);
|
|
void eapol_auth_free(struct eapol_state_machine *sm);
|
|
void eapol_auth_step(struct eapol_state_machine *sm);
|
|
void eapol_auth_initialize(struct eapol_state_machine *sm);
|
|
void eapol_auth_dump_state(FILE *f, const char *prefix,
|
|
struct eapol_state_machine *sm);
|
|
int eapol_auth_eap_pending_cb(struct eapol_state_machine *sm, void *ctx);
|
|
|
|
#endif /* EAPOL_SM_H */
|