187 lines
6.3 KiB
C
187 lines
6.3 KiB
C
/*
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* hostapd - IEEE 802.11i-2004 / WPA Authenticator
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.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 WPA_H
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#define WPA_H
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#include "wpa_common.h"
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#define WPA_PMK_LEN PMK_LEN
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#define WPA_GMK_LEN 32
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#define WPA_GTK_MAX_LEN 32
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#define PMKID_LEN 16
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#define WPA_CAPABILITY_PREAUTH BIT(0)
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#define WPA_CAPABILITY_MGMT_FRAME_PROTECTION BIT(6)
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#define WPA_CAPABILITY_PEERKEY_ENABLED BIT(9)
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struct wpa_eapol_key {
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u8 type;
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u16 key_info;
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u16 key_length;
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u8 replay_counter[WPA_REPLAY_COUNTER_LEN];
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u8 key_nonce[WPA_NONCE_LEN];
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u8 key_iv[16];
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u8 key_rsc[WPA_KEY_RSC_LEN];
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u8 key_id[8]; /* Reserved */
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u8 key_mic[16];
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u16 key_data_length;
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/* followed by key_data_length bytes of key_data */
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} __attribute__ ((packed));
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#define WPA_KEY_INFO_TYPE_MASK (BIT(0) | BIT(1) | BIT(2))
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#define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 BIT(0)
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#define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES BIT(1)
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#define WPA_KEY_INFO_KEY_TYPE BIT(3) /* 1 = Pairwise, 0 = Group key */
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/* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
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#define WPA_KEY_INFO_KEY_INDEX_MASK (BIT(4) | BIT(5))
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#define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
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#define WPA_KEY_INFO_INSTALL BIT(6) /* pairwise */
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#define WPA_KEY_INFO_TXRX BIT(6) /* group */
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#define WPA_KEY_INFO_ACK BIT(7)
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#define WPA_KEY_INFO_MIC BIT(8)
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#define WPA_KEY_INFO_SECURE BIT(9)
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#define WPA_KEY_INFO_ERROR BIT(10)
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#define WPA_KEY_INFO_REQUEST BIT(11)
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#define WPA_KEY_INFO_ENCR_KEY_DATA BIT(12)
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#define WPA_KEY_INFO_SMK_MESSAGE BIT(13)
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/* per STA state machine data */
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struct wpa_ptk {
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u8 mic_key[16]; /* EAPOL-Key MIC Key (MK) */
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u8 encr_key[16]; /* EAPOL-Key Encryption Key (EK) */
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u8 tk1[16]; /* Temporal Key 1 (TK1) */
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union {
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u8 tk2[16]; /* Temporal Key 2 (TK2) */
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struct {
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u8 tx_mic_key[8];
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u8 rx_mic_key[8];
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} auth;
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} u;
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} __attribute__ ((packed));
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struct wpa_authenticator;
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struct wpa_state_machine;
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struct rsn_pmksa_cache_entry;
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struct wpa_auth_config {
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int wpa;
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int wpa_key_mgmt;
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int wpa_pairwise;
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int wpa_group;
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int wpa_group_rekey;
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int wpa_strict_rekey;
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int wpa_gmk_rekey;
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int rsn_preauth;
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int eapol_version;
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int peerkey;
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int wme_enabled;
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#ifdef CONFIG_IEEE80211W
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enum {
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WPA_NO_IEEE80211W = 0,
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WPA_IEEE80211W_OPTIONAL = 1,
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WPA_IEEE80211W_REQUIRED = 2
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} ieee80211w;
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#endif /* CONFIG_IEEE80211W */
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};
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typedef enum {
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LOGGER_DEBUG, LOGGER_INFO, LOGGER_WARNING
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} logger_level;
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typedef enum {
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WPA_EAPOL_portEnabled, WPA_EAPOL_portValid, WPA_EAPOL_authorized,
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WPA_EAPOL_portControl_Auto, WPA_EAPOL_keyRun, WPA_EAPOL_keyAvailable,
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WPA_EAPOL_keyDone, WPA_EAPOL_inc_EapolFramesTx
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} wpa_eapol_variable;
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struct wpa_auth_callbacks {
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void *ctx;
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void (*logger)(void *ctx, const u8 *addr, logger_level level,
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const char *txt);
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void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
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void (*mic_failure_report)(void *ctx, const u8 *addr);
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void (*set_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var,
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int value);
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int (*get_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var);
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const u8 * (*get_psk)(void *ctx, const u8 *addr, const u8 *prev_psk);
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int (*get_pmk)(void *ctx, const u8 *addr, u8 *pmk, size_t *len);
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int (*set_key)(void *ctx, int vlan_id, const char *alg, const u8 *addr,
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int idx, u8 *key, size_t key_len);
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int (*get_seqnum)(void *ctx, const u8 *addr, int idx, u8 *seq);
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int (*get_seqnum_igtk)(void *ctx, const u8 *addr, int idx, u8 *seq);
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int (*send_eapol)(void *ctx, const u8 *addr, const u8 *data,
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size_t data_len, int encrypt);
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int (*for_each_sta)(void *ctx, int (*cb)(struct wpa_state_machine *sm,
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void *ctx), void *cb_ctx);
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};
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struct wpa_authenticator * wpa_init(const u8 *addr,
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struct wpa_auth_config *conf,
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struct wpa_auth_callbacks *cb);
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void wpa_deinit(struct wpa_authenticator *wpa_auth);
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int wpa_reconfig(struct wpa_authenticator *wpa_auth,
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struct wpa_auth_config *conf);
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enum {
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WPA_IE_OK, WPA_INVALID_IE, WPA_INVALID_GROUP, WPA_INVALID_PAIRWISE,
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WPA_INVALID_AKMP, WPA_NOT_ENABLED, WPA_ALLOC_FAIL,
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WPA_MGMT_FRAME_PROTECTION_VIOLATION, WPA_INVALID_MGMT_GROUP_CIPHER
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};
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int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
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struct wpa_state_machine *sm,
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const u8 *wpa_ie, size_t wpa_ie_len);
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struct wpa_state_machine *
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wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr);
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void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
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struct wpa_state_machine *sm);
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void wpa_auth_sta_deinit(struct wpa_state_machine *sm);
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void wpa_receive(struct wpa_authenticator *wpa_auth,
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struct wpa_state_machine *sm,
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u8 *data, size_t data_len);
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typedef enum {
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WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
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WPA_REAUTH_EAPOL
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} wpa_event;
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void wpa_remove_ptk(struct wpa_state_machine *sm);
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void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event);
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void wpa_auth_sm_notify(struct wpa_state_machine *sm);
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void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth);
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int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen);
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int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen);
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void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth);
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int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
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int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
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int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
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int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
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struct rsn_pmksa_cache_entry *entry);
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struct rsn_pmksa_cache_entry *
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wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm);
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void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm);
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const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth,
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size_t *len);
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int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
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int session_timeout, struct eapol_state_machine *eapol);
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int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
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const u8 *pmk, size_t len, const u8 *sta_addr,
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int session_timeout,
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struct eapol_state_machine *eapol);
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int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id);
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#endif /* WPA_H */
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