1 /* 2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator: Internal definitions 3 * Copyright (c) 2004-2007, Jouni Malinen <j@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 #ifdef CONFIG_IEEE80211V 91 unsigned int is_wnmsleep:1; 92 #endif /* CONFIG_IEEE80211V */ 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 u8 *assoc_resp_ftie; 122 #endif /* CONFIG_IEEE80211R */ 123 124 int pending_1_of_4_timeout; 125 }; 126 127 128 /* per group key state machine data */ 129 struct wpa_group { 130 struct wpa_group *next; 131 int vlan_id; 132 133 Boolean GInit; 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 Boolean first_sta_seen; 151 Boolean reject_4way_hs_for_entropy; 152 #ifdef CONFIG_IEEE80211W 153 u8 IGTK[2][WPA_IGTK_LEN]; 154 int GN_igtk, GM_igtk; 155 #endif /* CONFIG_IEEE80211W */ 156 }; 157 158 159 struct wpa_ft_pmk_cache; 160 161 /* per authenticator data */ 162 struct wpa_authenticator { 163 struct wpa_group *group; 164 165 unsigned int dot11RSNAStatsTKIPRemoteMICFailures; 166 u32 dot11RSNAAuthenticationSuiteSelected; 167 u32 dot11RSNAPairwiseCipherSelected; 168 u32 dot11RSNAGroupCipherSelected; 169 u8 dot11RSNAPMKIDUsed[PMKID_LEN]; 170 u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */ 171 u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */ 172 u32 dot11RSNAGroupCipherRequested; /* FIX: update */ 173 unsigned int dot11RSNATKIPCounterMeasuresInvoked; 174 unsigned int dot11RSNA4WayHandshakeFailures; 175 176 struct wpa_stsl_negotiation *stsl_negotiations; 177 178 struct wpa_auth_config conf; 179 struct wpa_auth_callbacks cb; 180 181 u8 *wpa_ie; 182 size_t wpa_ie_len; 183 184 u8 addr[ETH_ALEN]; 185 186 struct rsn_pmksa_cache *pmksa; 187 struct wpa_ft_pmk_cache *ft_pmk_cache; 188 }; 189 190 191 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 192 const u8 *pmkid); 193 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, 194 logger_level level, const char *txt); 195 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, 196 logger_level level, const char *fmt, ...); 197 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, 198 struct wpa_state_machine *sm, int key_info, 199 const u8 *key_rsc, const u8 *nonce, 200 const u8 *kde, size_t kde_len, 201 int keyidx, int encr, int force_version); 202 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, 203 int (*cb)(struct wpa_state_machine *sm, void *ctx), 204 void *cb_ctx); 205 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, 206 int (*cb)(struct wpa_authenticator *a, void *ctx), 207 void *cb_ctx); 208 209 #ifdef CONFIG_PEERKEY 210 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth, 211 struct wpa_stsl_negotiation *neg); 212 void wpa_smk_error(struct wpa_authenticator *wpa_auth, 213 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 214 void wpa_smk_m1(struct wpa_authenticator *wpa_auth, 215 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 216 void wpa_smk_m3(struct wpa_authenticator *wpa_auth, 217 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 218 #endif /* CONFIG_PEERKEY */ 219 220 #ifdef CONFIG_IEEE80211R 221 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len); 222 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 223 size_t r0kh_id_len, 224 const u8 *anonce, const u8 *snonce, 225 u8 *buf, size_t len, const u8 *subelem, 226 size_t subelem_len); 227 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 228 struct wpa_ptk *ptk, size_t ptk_len); 229 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void); 230 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache); 231 void wpa_ft_install_ptk(struct wpa_state_machine *sm); 232 #endif /* CONFIG_IEEE80211R */ 233 234 #endif /* WPA_AUTH_I_H */ 235