dist/wpa/hostapd/wpa_auth_i.h

   1 /*
   2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator: Internal definitions
   3  * Copyright (c) 2004-2007, 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_AUTH_I_H
  16 #define WPA_AUTH_I_H
  17
  18 struct wpa_group;
  19
  20 struct wpa_stsl_negotiation {
  21         struct wpa_stsl_negotiation *next;
  22         u8 initiator[ETH_ALEN];
  23         u8 peer[ETH_ALEN];
  24 };
  25
  26
  27 struct wpa_state_machine {
  28         struct wpa_authenticator *wpa_auth;
  29         struct wpa_group *group;
  30
  31         u8 addr[ETH_ALEN];
  32
  33         enum {
  34                 WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED,
  35                 WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2,
  36                 WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART,
  37                 WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2,
  38                 WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE
  39         } wpa_ptk_state;
  40
  41         enum {
  42                 WPA_PTK_GROUP_IDLE = 0,
  43                 WPA_PTK_GROUP_REKEYNEGOTIATING,
  44                 WPA_PTK_GROUP_REKEYESTABLISHED,
  45                 WPA_PTK_GROUP_KEYERROR
  46         } wpa_ptk_group_state;
  47
  48         Boolean Init;
  49         Boolean DeauthenticationRequest;
  50         Boolean AuthenticationRequest;
  51         Boolean ReAuthenticationRequest;
  52         Boolean Disconnect;
  53         int TimeoutCtr;
  54         int GTimeoutCtr;
  55         Boolean TimeoutEvt;
  56         Boolean EAPOLKeyReceived;
  57         Boolean EAPOLKeyPairwise;
  58         Boolean EAPOLKeyRequest;
  59         Boolean MICVerified;
  60         Boolean GUpdateStationKeys;
  61         u8 ANonce[WPA_NONCE_LEN];
  62         u8 SNonce[WPA_NONCE_LEN];
  63         u8 PMK[PMK_LEN];
  64         struct wpa_ptk PTK;
  65         Boolean PTK_valid;
  66         Boolean pairwise_set;
  67         int keycount;
  68         Boolean Pair;
  69         u8 key_replay_counter[WPA_REPLAY_COUNTER_LEN];
  70         Boolean key_replay_counter_valid;
  71         Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i */
  72         Boolean PTKRequest; /* not in IEEE 802.11i state machine */
  73         Boolean has_GTK;
  74
  75         u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */
  76         size_t last_rx_eapol_key_len;
  77
  78         unsigned int changed:1;
  79         unsigned int in_step_loop:1;
  80         unsigned int pending_deinit:1;
  81         unsigned int started:1;
  82         unsigned int mgmt_frame_prot:1;
  83 #ifdef CONFIG_IEEE80211R
  84         unsigned int ft_completed:1;
  85         unsigned int pmk_r1_name_valid:1;
  86 #endif /* CONFIG_IEEE80211R */
  87
  88         u8 req_replay_counter[WPA_REPLAY_COUNTER_LEN];
  89         int req_replay_counter_used;
  90
  91         u8 *wpa_ie;
  92         size_t wpa_ie_len;
  93
  94         enum {
  95                 WPA_VERSION_NO_WPA = 0 /* WPA not used */,
  96                 WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */,
  97                 WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */
  98         } wpa;
  99         int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
 100         int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */
 101         struct rsn_pmksa_cache_entry *pmksa;
 102
 103         u32 dot11RSNAStatsTKIPLocalMICFailures;
 104         u32 dot11RSNAStatsTKIPRemoteMICFailures;
 105
 106 #ifdef CONFIG_IEEE80211R
 107         u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */
 108         size_t xxkey_len;
 109         u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth
 110                                            * Request */
 111         u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */
 112         size_t r0kh_id_len;
 113 #endif /* CONFIG_IEEE80211R */
 114 };
 115
 116
 117 /* per group key state machine data */
 118 struct wpa_group {
 119         struct wpa_group *next;
 120         int vlan_id;
 121
 122         Boolean GInit;
 123         int GKeyDoneStations;
 124         Boolean GTKReKey;
 125         int GTK_len;
 126         int GN, GM;
 127         Boolean GTKAuthenticator;
 128         u8 Counter[WPA_NONCE_LEN];
 129
 130         enum {
 131                 WPA_GROUP_GTK_INIT = 0,
 132                 WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE
 133         } wpa_group_state;
 134
 135         u8 GMK[WPA_GMK_LEN];
 136         u8 GTK[2][WPA_GTK_MAX_LEN];
 137         u8 GNonce[WPA_NONCE_LEN];
 138         Boolean changed;
 139 #ifdef CONFIG_IEEE80211W
 140         u8 IGTK[2][WPA_IGTK_LEN];
 141         int GN_igtk, GM_igtk;
 142 #endif /* CONFIG_IEEE80211W */
 143 };
 144
 145
 146 struct wpa_ft_pmk_cache;
 147
 148 /* per authenticator data */
 149 struct wpa_authenticator {
 150         struct wpa_group *group;
 151
 152         unsigned int dot11RSNAStatsTKIPRemoteMICFailures;
 153         u32 dot11RSNAAuthenticationSuiteSelected;
 154         u32 dot11RSNAPairwiseCipherSelected;
 155         u32 dot11RSNAGroupCipherSelected;
 156         u8 dot11RSNAPMKIDUsed[PMKID_LEN];
 157         u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */
 158         u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */
 159         u32 dot11RSNAGroupCipherRequested; /* FIX: update */
 160         unsigned int dot11RSNATKIPCounterMeasuresInvoked;
 161         unsigned int dot11RSNA4WayHandshakeFailures;
 162
 163         struct wpa_stsl_negotiation *stsl_negotiations;
 164
 165         struct wpa_auth_config conf;
 166         struct wpa_auth_callbacks cb;
 167
 168         u8 *wpa_ie;
 169         size_t wpa_ie_len;
 170
 171         u8 addr[ETH_ALEN];
 172
 173         struct rsn_pmksa_cache *pmksa;
 174         struct wpa_ft_pmk_cache *ft_pmk_cache;
 175 };
 176
 177
 178 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len,
 179                      const u8 *pmkid);
 180 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 181                      logger_level level, const char *txt);
 182 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 183                       logger_level level, const char *fmt, ...);
 184 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
 185                       struct wpa_state_machine *sm, int key_info,
 186                       const u8 *key_rsc, const u8 *nonce,
 187                       const u8 *kde, size_t kde_len,
 188                       int keyidx, int encr, int force_version);
 189 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 190                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 191                           void *cb_ctx);
 192 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 193                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 194                            void *cb_ctx);
 195
 196 #ifdef CONFIG_PEERKEY
 197 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth,
 198                     struct wpa_stsl_negotiation *neg);
 199 void wpa_smk_error(struct wpa_authenticator *wpa_auth,
 200                    struct wpa_state_machine *sm, struct wpa_eapol_key *key);
 201 void wpa_smk_m1(struct wpa_authenticator *wpa_auth,
 202                 struct wpa_state_machine *sm, struct wpa_eapol_key *key);
 203 void wpa_smk_m3(struct wpa_authenticator *wpa_auth,
 204                 struct wpa_state_machine *sm, struct wpa_eapol_key *key);
 205 #endif /* CONFIG_PEERKEY */
 206
 207 #ifdef CONFIG_IEEE80211R
 208 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len);
 209 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
 210                            struct wpa_ptk *ptk);
 211 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void);
 212 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache);
 213 #endif /* CONFIG_IEEE80211R */
 214
 215 #endif /* WPA_AUTH_I_H */