contrib/hostapd-0.5.8/wpa.h

   1 /*
   2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator
   3  * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef WPA_H
  16 #define WPA_H
  17
  18 #include "wpa_common.h"
  19
  20 #define WPA_PMK_LEN PMK_LEN
  21 #define WPA_GMK_LEN 32
  22 #define WPA_GTK_MAX_LEN 32
  23 #define PMKID_LEN 16
  24
  25 #define WPA_CAPABILITY_PREAUTH BIT(0)
  26 #define WPA_CAPABILITY_MGMT_FRAME_PROTECTION BIT(6)
  27 #define WPA_CAPABILITY_PEERKEY_ENABLED BIT(9)
  28
  29 struct wpa_eapol_key {
  30         u8 type;
  31         u16 key_info;
  32         u16 key_length;
  33         u8 replay_counter[WPA_REPLAY_COUNTER_LEN];
  34         u8 key_nonce[WPA_NONCE_LEN];
  35         u8 key_iv[16];
  36         u8 key_rsc[WPA_KEY_RSC_LEN];
  37         u8 key_id[8]; /* Reserved */
  38         u8 key_mic[16];
  39         u16 key_data_length;
  40         /* followed by key_data_length bytes of key_data */
  41 } __attribute__ ((packed));
  42
  43 #define WPA_KEY_INFO_TYPE_MASK (BIT(0) | BIT(1) | BIT(2))
  44 #define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 BIT(0)
  45 #define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES BIT(1)
  46 #define WPA_KEY_INFO_KEY_TYPE BIT(3) /* 1 = Pairwise, 0 = Group key */
  47 /* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
  48 #define WPA_KEY_INFO_KEY_INDEX_MASK (BIT(4) | BIT(5))
  49 #define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
  50 #define WPA_KEY_INFO_INSTALL BIT(6) /* pairwise */
  51 #define WPA_KEY_INFO_TXRX BIT(6) /* group */
  52 #define WPA_KEY_INFO_ACK BIT(7)
  53 #define WPA_KEY_INFO_MIC BIT(8)
  54 #define WPA_KEY_INFO_SECURE BIT(9)
  55 #define WPA_KEY_INFO_ERROR BIT(10)
  56 #define WPA_KEY_INFO_REQUEST BIT(11)
  57 #define WPA_KEY_INFO_ENCR_KEY_DATA BIT(12)
  58 #define WPA_KEY_INFO_SMK_MESSAGE BIT(13)
  59
  60
  61 /* per STA state machine data */
  62
  63 struct wpa_ptk {
  64         u8 mic_key[16]; /* EAPOL-Key MIC Key (MK) */
  65         u8 encr_key[16]; /* EAPOL-Key Encryption Key (EK) */
  66         u8 tk1[16]; /* Temporal Key 1 (TK1) */
  67         union {
  68                 u8 tk2[16]; /* Temporal Key 2 (TK2) */
  69                 struct {
  70                         u8 tx_mic_key[8];
  71                         u8 rx_mic_key[8];
  72                 } auth;
  73         } u;
  74 } __attribute__ ((packed));
  75
  76 struct wpa_authenticator;
  77 struct wpa_state_machine;
  78 struct rsn_pmksa_cache_entry;
  79
  80
  81 struct wpa_auth_config {
  82         int wpa;
  83         int wpa_key_mgmt;
  84         int wpa_pairwise;
  85         int wpa_group;
  86         int wpa_group_rekey;
  87         int wpa_strict_rekey;
  88         int wpa_gmk_rekey;
  89         int rsn_preauth;
  90         int eapol_version;
  91         int peerkey;
  92         int wme_enabled;
  93 #ifdef CONFIG_IEEE80211W
  94         enum {
  95                 WPA_NO_IEEE80211W = 0,
  96                 WPA_IEEE80211W_OPTIONAL = 1,
  97                 WPA_IEEE80211W_REQUIRED = 2
  98         } ieee80211w;
  99 #endif /* CONFIG_IEEE80211W */
 100 };
 101
 102 typedef enum {
 103         LOGGER_DEBUG, LOGGER_INFO, LOGGER_WARNING
 104 } logger_level;
 105
 106 typedef enum {
 107         WPA_EAPOL_portEnabled, WPA_EAPOL_portValid, WPA_EAPOL_authorized,
 108         WPA_EAPOL_portControl_Auto, WPA_EAPOL_keyRun, WPA_EAPOL_keyAvailable,
 109         WPA_EAPOL_keyDone, WPA_EAPOL_inc_EapolFramesTx
 110 } wpa_eapol_variable;
 111
 112 struct wpa_auth_callbacks {
 113         void *ctx;
 114         void (*logger)(void *ctx, const u8 *addr, logger_level level,
 115                        const char *txt);
 116         void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
 117         void (*mic_failure_report)(void *ctx, const u8 *addr);
 118         void (*set_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var,
 119                           int value);
 120         int (*get_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var);
 121         const u8 * (*get_psk)(void *ctx, const u8 *addr, const u8 *prev_psk);
 122         int (*get_pmk)(void *ctx, const u8 *addr, u8 *pmk, size_t *len);
 123         int (*set_key)(void *ctx, int vlan_id, const char *alg, const u8 *addr,
 124                        int idx, u8 *key, size_t key_len);
 125         int (*get_seqnum)(void *ctx, const u8 *addr, int idx, u8 *seq);
 126         int (*get_seqnum_igtk)(void *ctx, const u8 *addr, int idx, u8 *seq);
 127         int (*send_eapol)(void *ctx, const u8 *addr, const u8 *data,
 128                           size_t data_len, int encrypt);
 129         int (*for_each_sta)(void *ctx, int (*cb)(struct wpa_state_machine *sm,
 130                                                  void *ctx), void *cb_ctx);
 131 };
 132
 133 struct wpa_authenticator * wpa_init(const u8 *addr,
 134                                     struct wpa_auth_config *conf,
 135                                     struct wpa_auth_callbacks *cb);
 136 void wpa_deinit(struct wpa_authenticator *wpa_auth);
 137 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 138                  struct wpa_auth_config *conf);
 139
 140 enum {
 141         WPA_IE_OK, WPA_INVALID_IE, WPA_INVALID_GROUP, WPA_INVALID_PAIRWISE,
 142         WPA_INVALID_AKMP, WPA_NOT_ENABLED, WPA_ALLOC_FAIL,
 143         WPA_MGMT_FRAME_PROTECTION_VIOLATION, WPA_INVALID_MGMT_GROUP_CIPHER
 144 };
 145
 146 int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
 147                         struct wpa_state_machine *sm,
 148                         const u8 *wpa_ie, size_t wpa_ie_len);
 149 struct wpa_state_machine *
 150 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr);
 151 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 152                              struct wpa_state_machine *sm);
 153 void wpa_auth_sta_deinit(struct wpa_state_machine *sm);
 154 void wpa_receive(struct wpa_authenticator *wpa_auth,
 155                  struct wpa_state_machine *sm,
 156                  u8 *data, size_t data_len);
 157 typedef enum {
 158         WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
 159         WPA_REAUTH_EAPOL
 160 } wpa_event;
 161 void wpa_remove_ptk(struct wpa_state_machine *sm);
 162 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event);
 163 void wpa_auth_sm_notify(struct wpa_state_machine *sm);
 164 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth);
 165 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen);
 166 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen);
 167 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth);
 168 int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
 169 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
 170 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
 171 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
 172                              struct rsn_pmksa_cache_entry *entry);
 173 struct rsn_pmksa_cache_entry *
 174 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm);
 175 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm);
 176 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth,
 177                                size_t *len);
 178 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
 179                        int session_timeout, struct eapol_state_machine *eapol);
 180 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
 181                                const u8 *pmk, size_t len, const u8 *sta_addr,
 182                                int session_timeout,
 183                                struct eapol_state_machine *eapol);
 184 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id);
 185
 186 #endif /* WPA_H */