contrib/hostapd-0.4.9/wpa.h

   1 #ifndef WPA_H
   2 #define WPA_H
   3
   4 #define WPA_NONCE_LEN 32
   5 #define WPA_PMK_LEN PMK_LEN
   6 #define WPA_REPLAY_COUNTER_LEN 8
   7 #define WPA_GMK_LEN 32
   8 #define WPA_GTK_MAX_LEN 32
   9 #define WPA_KEY_RSC_LEN 8
  10 #define PMKID_LEN 16
  11
  12 struct rsn_pmksa_cache {
  13         struct rsn_pmksa_cache *next, *hnext;
  14         u8 pmkid[PMKID_LEN];
  15         u8 pmk[PMK_LEN];
  16         time_t expiration;
  17         int akmp; /* WPA_KEY_MGMT_* */
  18         u8 spa[ETH_ALEN];
  19         u8 *identity;
  20         size_t identity_len;
  21         struct radius_class_data radius_class;
  22 };
  23
  24 struct rsn_preauth_interface {
  25         struct rsn_preauth_interface *next;
  26         struct hostapd_data *hapd;
  27         struct l2_packet_data *l2;
  28         char *ifname;
  29         int ifindex;
  30 };
  31
  32 struct wpa_eapol_key {
  33         u8 type;
  34         u16 key_info;
  35         u16 key_length;
  36         u8 replay_counter[WPA_REPLAY_COUNTER_LEN];
  37         u8 key_nonce[WPA_NONCE_LEN];
  38         u8 key_iv[16];
  39         u8 key_rsc[WPA_KEY_RSC_LEN];
  40         u8 key_id[8]; /* Reserved */
  41         u8 key_mic[16];
  42         u16 key_data_length;
  43         /* followed by key_data_length bytes of key_data */
  44 } __attribute__ ((packed));
  45
  46 #define WPA_KEY_INFO_TYPE_MASK (BIT(0) | BIT(1) | BIT(2))
  47 #define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 BIT(0)
  48 #define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES BIT(1)
  49 #define WPA_KEY_INFO_KEY_TYPE BIT(3) /* 1 = Pairwise, 0 = Group key */
  50 /* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
  51 #define WPA_KEY_INFO_KEY_INDEX_MASK (BIT(4) | BIT(5))
  52 #define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
  53 #define WPA_KEY_INFO_INSTALL BIT(6) /* pairwise */
  54 #define WPA_KEY_INFO_TXRX BIT(6) /* group */
  55 #define WPA_KEY_INFO_ACK BIT(7)
  56 #define WPA_KEY_INFO_MIC BIT(8)
  57 #define WPA_KEY_INFO_SECURE BIT(9)
  58 #define WPA_KEY_INFO_ERROR BIT(10)
  59 #define WPA_KEY_INFO_REQUEST BIT(11)
  60 #define WPA_KEY_INFO_ENCR_KEY_DATA BIT(12)
  61
  62
  63 /* per STA state machine data */
  64
  65 struct wpa_ptk {
  66         u8 mic_key[16]; /* EAPOL-Key MIC Key (MK) */
  67         u8 encr_key[16]; /* EAPOL-Key Encryption Key (EK) */
  68         u8 tk1[16]; /* Temporal Key 1 (TK1) */
  69         union {
  70                 u8 tk2[16]; /* Temporal Key 2 (TK2) */
  71                 struct {
  72                         u8 tx_mic_key[8];
  73                         u8 rx_mic_key[8];
  74                 } auth;
  75         } u;
  76 } __attribute__ ((packed));
  77
  78 struct wpa_state_machine {
  79         struct hostapd_data *hapd;
  80         struct sta_info *sta;
  81
  82         enum {
  83                 WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED,
  84                 WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2,
  85                 WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART,
  86                 WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2,
  87                 WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE
  88         } wpa_ptk_state;
  89
  90         enum {
  91                 WPA_PTK_GROUP_IDLE = 0,
  92                 WPA_PTK_GROUP_REKEYNEGOTIATING,
  93                 WPA_PTK_GROUP_REKEYESTABLISHED,
  94                 WPA_PTK_GROUP_KEYERROR
  95         } wpa_ptk_group_state;
  96
  97         Boolean Init;
  98         Boolean DeauthenticationRequest;
  99         Boolean AuthenticationRequest;
 100         Boolean ReAuthenticationRequest;
 101         Boolean Disconnect;
 102         int TimeoutCtr;
 103         int GTimeoutCtr;
 104         Boolean TimeoutEvt;
 105         Boolean EAPOLKeyReceived;
 106         Boolean EAPOLKeyPairwise;
 107         Boolean EAPOLKeyRequest;
 108         Boolean MICVerified;
 109         Boolean GUpdateStationKeys;
 110         u8 ANonce[WPA_NONCE_LEN];
 111         u8 SNonce[WPA_NONCE_LEN];
 112         u8 PMK[WPA_PMK_LEN];
 113         struct wpa_ptk PTK;
 114         Boolean PTK_valid;
 115         Boolean pairwise_set;
 116         int keycount;
 117         Boolean Pair;
 118         u8 key_replay_counter[WPA_REPLAY_COUNTER_LEN];
 119         Boolean key_replay_counter_valid;
 120         Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i/D8 */
 121         Boolean PTKRequest; /* not in IEEE 802.11i state machine */
 122         Boolean has_GTK;
 123
 124         u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */
 125         size_t last_rx_eapol_key_len;
 126
 127         Boolean changed;
 128 };
 129
 130 /* per authenticator data */
 131 struct wpa_authenticator {
 132         Boolean GInit;
 133         int GNoStations;
 134         int GKeyDoneStations;
 135         Boolean GTKReKey;
 136         int GTK_len;
 137         int GN, GM;
 138         Boolean GTKAuthenticator;
 139         u8 Counter[WPA_NONCE_LEN];
 140
 141         enum {
 142                 WPA_GROUP_GTK_INIT = 0,
 143                 WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE
 144         } wpa_group_state;
 145
 146         u8 GMK[WPA_GMK_LEN];
 147         u8 GTK[2][WPA_GTK_MAX_LEN];
 148         u8 GNonce[WPA_NONCE_LEN];
 149         Boolean changed;
 150
 151         unsigned int dot11RSNAStatsTKIPRemoteMICFailures;
 152         u8 dot11RSNAAuthenticationSuiteSelected[4];
 153         u8 dot11RSNAPairwiseCipherSelected[4];
 154         u8 dot11RSNAGroupCipherSelected[4];
 155         u8 dot11RSNAPMKIDUsed[PMKID_LEN];
 156         u8 dot11RSNAAuthenticationSuiteRequested[4]; /* FIX: update */
 157         u8 dot11RSNAPairwiseCipherRequested[4]; /* FIX: update */
 158         u8 dot11RSNAGroupCipherRequested[4]; /* FIX: update */
 159         unsigned int dot11RSNATKIPCounterMeasuresInvoked;
 160         unsigned int dot11RSNA4WayHandshakeFailures;
 161 };
 162
 163
 164 int wpa_init(struct hostapd_data *hapd);
 165 void wpa_deinit(struct hostapd_data *hapd);
 166
 167 enum {
 168         WPA_IE_OK, WPA_INVALID_IE, WPA_INVALID_GROUP, WPA_INVALID_PAIRWISE,
 169         WPA_INVALID_AKMP
 170 };
 171
 172 int wpa_validate_wpa_ie(struct hostapd_data *hapd, struct sta_info *sta,
 173                         const u8 *wpa_ie, size_t wpa_ie_len, int version);
 174 void wpa_new_station(struct hostapd_data *hapd, struct sta_info *sta);
 175 void wpa_free_station(struct sta_info *sta);
 176 void wpa_receive(struct hostapd_data *hapd, struct sta_info *sta,
 177                  u8 *data, size_t data_len);
 178 typedef enum {
 179         WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
 180         WPA_REAUTH_EAPOL
 181 } wpa_event;
 182 void wpa_sm_event(struct hostapd_data *hapd, struct sta_info *sta,
 183                   wpa_event event);
 184 void wpa_sm_notify(struct hostapd_data *hapd, struct sta_info *sta);
 185 void pmksa_cache_add(struct hostapd_data *hapd, struct sta_info *sta, u8 *pmk,
 186                      int session_timeout);
 187 void rsn_preauth_finished(struct hostapd_data *hapd, struct sta_info *sta,
 188                           int success);
 189 void rsn_preauth_send(struct hostapd_data *hapd, struct sta_info *sta,
 190                       u8 *buf, size_t len);
 191 void wpa_gtk_rekey(struct hostapd_data *hapd);
 192 int wpa_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen);
 193 int wpa_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
 194                     char *buf, size_t buflen);
 195
 196 #endif /* WPA_H */