src/ap/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 /* max(dot11RSNAConfigGroupUpdateCount,dot11RSNAConfigPairwiseUpdateCount) */
  19 #define RSNA_MAX_EAPOL_RETRIES 4
  20
  21 struct wpa_group;
  22
  23 struct wpa_stsl_negotiation {
  24         struct wpa_stsl_negotiation *next;
  25         u8 initiator[ETH_ALEN];
  26         u8 peer[ETH_ALEN];
  27 };
  28
  29
  30 struct wpa_state_machine {
  31         struct wpa_authenticator *wpa_auth;
  32         struct wpa_group *group;
  33
  34         u8 addr[ETH_ALEN];
  35
  36         enum {
  37                 WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED,
  38                 WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2,
  39                 WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART,
  40                 WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2,
  41                 WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE
  42         } wpa_ptk_state;
  43
  44         enum {
  45                 WPA_PTK_GROUP_IDLE = 0,
  46                 WPA_PTK_GROUP_REKEYNEGOTIATING,
  47                 WPA_PTK_GROUP_REKEYESTABLISHED,
  48                 WPA_PTK_GROUP_KEYERROR
  49         } wpa_ptk_group_state;
  50
  51         Boolean Init;
  52         Boolean DeauthenticationRequest;
  53         Boolean AuthenticationRequest;
  54         Boolean ReAuthenticationRequest;
  55         Boolean Disconnect;
  56         int TimeoutCtr;
  57         int GTimeoutCtr;
  58         Boolean TimeoutEvt;
  59         Boolean EAPOLKeyReceived;
  60         Boolean EAPOLKeyPairwise;
  61         Boolean EAPOLKeyRequest;
  62         Boolean MICVerified;
  63         Boolean GUpdateStationKeys;
  64         u8 ANonce[WPA_NONCE_LEN];
  65         u8 SNonce[WPA_NONCE_LEN];
  66         u8 PMK[PMK_LEN];
  67         struct wpa_ptk PTK;
  68         Boolean PTK_valid;
  69         Boolean pairwise_set;
  70         int keycount;
  71         Boolean Pair;
  72         struct {
  73                 u8 counter[WPA_REPLAY_COUNTER_LEN];
  74                 Boolean valid;
  75         } key_replay[RSNA_MAX_EAPOL_RETRIES];
  76         Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i */
  77         Boolean PTKRequest; /* not in IEEE 802.11i state machine */
  78         Boolean has_GTK;
  79         Boolean PtkGroupInit; /* init request for PTK Group state machine */
  80
  81         u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */
  82         size_t last_rx_eapol_key_len;
  83
  84         unsigned int changed:1;
  85         unsigned int in_step_loop:1;
  86         unsigned int pending_deinit:1;
  87         unsigned int started:1;
  88         unsigned int mgmt_frame_prot:1;
  89 #ifdef CONFIG_IEEE80211R
  90         unsigned int ft_completed:1;
  91         unsigned int pmk_r1_name_valid:1;
  92 #endif /* CONFIG_IEEE80211R */
  93
  94         u8 req_replay_counter[WPA_REPLAY_COUNTER_LEN];
  95         int req_replay_counter_used;
  96
  97         u8 *wpa_ie;
  98         size_t wpa_ie_len;
  99
 100         enum {
 101                 WPA_VERSION_NO_WPA = 0 /* WPA not used */,
 102                 WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */,
 103                 WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */
 104         } wpa;
 105         int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
 106         int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */
 107         struct rsn_pmksa_cache_entry *pmksa;
 108
 109         u32 dot11RSNAStatsTKIPLocalMICFailures;
 110         u32 dot11RSNAStatsTKIPRemoteMICFailures;
 111
 112 #ifdef CONFIG_IEEE80211R
 113         u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */
 114         size_t xxkey_len;
 115         u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth
 116                                            * Request */
 117         u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */
 118         size_t r0kh_id_len;
 119         u8 sup_pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name from EAPOL-Key
 120                                                * message 2/4 */
 121 #endif /* CONFIG_IEEE80211R */
 122 };
 123
 124
 125 /* per group key state machine data */
 126 struct wpa_group {
 127         struct wpa_group *next;
 128         int vlan_id;
 129
 130         Boolean GInit;
 131         int GKeyDoneStations;
 132         Boolean GTKReKey;
 133         int GTK_len;
 134         int GN, GM;
 135         Boolean GTKAuthenticator;
 136         u8 Counter[WPA_NONCE_LEN];
 137
 138         enum {
 139                 WPA_GROUP_GTK_INIT = 0,
 140                 WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE
 141         } wpa_group_state;
 142
 143         u8 GMK[WPA_GMK_LEN];
 144         u8 GTK[2][WPA_GTK_MAX_LEN];
 145         u8 GNonce[WPA_NONCE_LEN];
 146         Boolean changed;
 147 #ifdef CONFIG_IEEE80211W
 148         u8 IGTK[2][WPA_IGTK_LEN];
 149         int GN_igtk, GM_igtk;
 150 #endif /* CONFIG_IEEE80211W */
 151 };
 152
 153
 154 struct wpa_ft_pmk_cache;
 155
 156 /* per authenticator data */
 157 struct wpa_authenticator {
 158         struct wpa_group *group;
 159
 160         unsigned int dot11RSNAStatsTKIPRemoteMICFailures;
 161         u32 dot11RSNAAuthenticationSuiteSelected;
 162         u32 dot11RSNAPairwiseCipherSelected;
 163         u32 dot11RSNAGroupCipherSelected;
 164         u8 dot11RSNAPMKIDUsed[PMKID_LEN];
 165         u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */
 166         u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */
 167         u32 dot11RSNAGroupCipherRequested; /* FIX: update */
 168         unsigned int dot11RSNATKIPCounterMeasuresInvoked;
 169         unsigned int dot11RSNA4WayHandshakeFailures;
 170
 171         struct wpa_stsl_negotiation *stsl_negotiations;
 172
 173         struct wpa_auth_config conf;
 174         struct wpa_auth_callbacks cb;
 175
 176         u8 *wpa_ie;
 177         size_t wpa_ie_len;
 178
 179         u8 addr[ETH_ALEN];
 180
 181         struct rsn_pmksa_cache *pmksa;
 182         struct wpa_ft_pmk_cache *ft_pmk_cache;
 183 };
 184
 185
 186 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len,
 187                      const u8 *pmkid);
 188 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 189                      logger_level level, const char *txt);
 190 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 191                       logger_level level, const char *fmt, ...);
 192 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
 193                       struct wpa_state_machine *sm, int key_info,
 194                       const u8 *key_rsc, const u8 *nonce,
 195                       const u8 *kde, size_t kde_len,
 196                       int keyidx, int encr, int force_version);
 197 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 198                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 199                           void *cb_ctx);
 200 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 201                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 202                            void *cb_ctx);
 203
 204 #ifdef CONFIG_PEERKEY
 205 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth,
 206                     struct wpa_stsl_negotiation *neg);
 207 void wpa_smk_error(struct wpa_authenticator *wpa_auth,
 208                    struct wpa_state_machine *sm, struct wpa_eapol_key *key);
 209 void wpa_smk_m1(struct wpa_authenticator *wpa_auth,
 210                 struct wpa_state_machine *sm, struct wpa_eapol_key *key);
 211 void wpa_smk_m3(struct wpa_authenticator *wpa_auth,
 212                 struct wpa_state_machine *sm, struct wpa_eapol_key *key);
 213 #endif /* CONFIG_PEERKEY */
 214
 215 #ifdef CONFIG_IEEE80211R
 216 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len);
 217 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
 218                    size_t r0kh_id_len,
 219                    const u8 *anonce, const u8 *snonce,
 220                    u8 *buf, size_t len, const u8 *subelem,
 221                    size_t subelem_len);
 222 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
 223                            struct wpa_ptk *ptk, size_t ptk_len);
 224 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void);
 225 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache);
 226 void wpa_ft_install_ptk(struct wpa_state_machine *sm);
 227 #endif /* CONFIG_IEEE80211R */
 228
 229 #endif /* WPA_AUTH_I_H */