1 /* 2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator: Internal definitions 3 * Copyright (c) 2004-2007, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef WPA_AUTH_I_H 10 #define WPA_AUTH_I_H 11 12 /* max(dot11RSNAConfigGroupUpdateCount,dot11RSNAConfigPairwiseUpdateCount) */ 13 #define RSNA_MAX_EAPOL_RETRIES 4 14 15 struct wpa_group; 16 17 struct wpa_stsl_negotiation { 18 struct wpa_stsl_negotiation *next; 19 u8 initiator[ETH_ALEN]; 20 u8 peer[ETH_ALEN]; 21 }; 22 23 24 struct wpa_state_machine { 25 struct wpa_authenticator *wpa_auth; 26 struct wpa_group *group; 27 28 u8 addr[ETH_ALEN]; 29 30 enum { 31 WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED, 32 WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2, 33 WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART, 34 WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2, 35 WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE 36 } wpa_ptk_state; 37 38 enum { 39 WPA_PTK_GROUP_IDLE = 0, 40 WPA_PTK_GROUP_REKEYNEGOTIATING, 41 WPA_PTK_GROUP_REKEYESTABLISHED, 42 WPA_PTK_GROUP_KEYERROR 43 } wpa_ptk_group_state; 44 45 Boolean Init; 46 Boolean DeauthenticationRequest; 47 Boolean AuthenticationRequest; 48 Boolean ReAuthenticationRequest; 49 Boolean Disconnect; 50 int TimeoutCtr; 51 int GTimeoutCtr; 52 Boolean TimeoutEvt; 53 Boolean EAPOLKeyReceived; 54 Boolean EAPOLKeyPairwise; 55 Boolean EAPOLKeyRequest; 56 Boolean MICVerified; 57 Boolean GUpdateStationKeys; 58 u8 ANonce[WPA_NONCE_LEN]; 59 u8 SNonce[WPA_NONCE_LEN]; 60 u8 PMK[PMK_LEN]; 61 struct wpa_ptk PTK; 62 Boolean PTK_valid; 63 Boolean pairwise_set; 64 int keycount; 65 Boolean Pair; 66 struct wpa_key_replay_counter { 67 u8 counter[WPA_REPLAY_COUNTER_LEN]; 68 Boolean valid; 69 } key_replay[RSNA_MAX_EAPOL_RETRIES], 70 prev_key_replay[RSNA_MAX_EAPOL_RETRIES]; 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 Boolean PtkGroupInit; /* init request for PTK Group state machine */ 75 76 u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */ 77 size_t last_rx_eapol_key_len; 78 79 unsigned int changed:1; 80 unsigned int in_step_loop:1; 81 unsigned int pending_deinit:1; 82 unsigned int started:1; 83 unsigned int mgmt_frame_prot:1; 84 unsigned int rx_eapol_key_secure:1; 85 unsigned int update_snonce:1; 86 #ifdef CONFIG_IEEE80211R 87 unsigned int ft_completed:1; 88 unsigned int pmk_r1_name_valid:1; 89 #endif /* CONFIG_IEEE80211R */ 90 91 u8 req_replay_counter[WPA_REPLAY_COUNTER_LEN]; 92 int req_replay_counter_used; 93 94 u8 *wpa_ie; 95 size_t wpa_ie_len; 96 97 enum { 98 WPA_VERSION_NO_WPA = 0 /* WPA not used */, 99 WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */, 100 WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */ 101 } wpa; 102 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ 103 int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */ 104 struct rsn_pmksa_cache_entry *pmksa; 105 106 u32 dot11RSNAStatsTKIPLocalMICFailures; 107 u32 dot11RSNAStatsTKIPRemoteMICFailures; 108 109 #ifdef CONFIG_IEEE80211R 110 u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */ 111 size_t xxkey_len; 112 u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth 113 * Request */ 114 u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */ 115 size_t r0kh_id_len; 116 u8 sup_pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name from EAPOL-Key 117 * message 2/4 */ 118 u8 *assoc_resp_ftie; 119 #endif /* CONFIG_IEEE80211R */ 120 121 int pending_1_of_4_timeout; 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 Boolean first_sta_seen; 148 Boolean reject_4way_hs_for_entropy; 149 #ifdef CONFIG_IEEE80211W 150 u8 IGTK[2][WPA_IGTK_LEN]; 151 int GN_igtk, GM_igtk; 152 #endif /* CONFIG_IEEE80211W */ 153 }; 154 155 156 struct wpa_ft_pmk_cache; 157 158 /* per authenticator data */ 159 struct wpa_authenticator { 160 struct wpa_group *group; 161 162 unsigned int dot11RSNAStatsTKIPRemoteMICFailures; 163 u32 dot11RSNAAuthenticationSuiteSelected; 164 u32 dot11RSNAPairwiseCipherSelected; 165 u32 dot11RSNAGroupCipherSelected; 166 u8 dot11RSNAPMKIDUsed[PMKID_LEN]; 167 u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */ 168 u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */ 169 u32 dot11RSNAGroupCipherRequested; /* FIX: update */ 170 unsigned int dot11RSNATKIPCounterMeasuresInvoked; 171 unsigned int dot11RSNA4WayHandshakeFailures; 172 173 struct wpa_stsl_negotiation *stsl_negotiations; 174 175 struct wpa_auth_config conf; 176 struct wpa_auth_callbacks cb; 177 178 u8 *wpa_ie; 179 size_t wpa_ie_len; 180 181 u8 addr[ETH_ALEN]; 182 183 struct rsn_pmksa_cache *pmksa; 184 struct wpa_ft_pmk_cache *ft_pmk_cache; 185 }; 186 187 188 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 189 const u8 *pmkid); 190 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, 191 logger_level level, const char *txt); 192 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, 193 logger_level level, const char *fmt, ...); 194 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, 195 struct wpa_state_machine *sm, int key_info, 196 const u8 *key_rsc, const u8 *nonce, 197 const u8 *kde, size_t kde_len, 198 int keyidx, int encr, int force_version); 199 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, 200 int (*cb)(struct wpa_state_machine *sm, void *ctx), 201 void *cb_ctx); 202 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, 203 int (*cb)(struct wpa_authenticator *a, void *ctx), 204 void *cb_ctx); 205 206 #ifdef CONFIG_PEERKEY 207 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth, 208 struct wpa_stsl_negotiation *neg); 209 void wpa_smk_error(struct wpa_authenticator *wpa_auth, 210 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 211 void wpa_smk_m1(struct wpa_authenticator *wpa_auth, 212 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 213 void wpa_smk_m3(struct wpa_authenticator *wpa_auth, 214 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 215 #endif /* CONFIG_PEERKEY */ 216 217 #ifdef CONFIG_IEEE80211R 218 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len); 219 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 220 size_t r0kh_id_len, 221 const u8 *anonce, const u8 *snonce, 222 u8 *buf, size_t len, const u8 *subelem, 223 size_t subelem_len); 224 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 225 struct wpa_ptk *ptk, size_t ptk_len); 226 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void); 227 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache); 228 void wpa_ft_install_ptk(struct wpa_state_machine *sm); 229 #endif /* CONFIG_IEEE80211R */ 230 231 #endif /* WPA_AUTH_I_H */ 232
