1 /* 2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator: Internal definitions 3 * Copyright (c) 2004-2015, 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 u8 p2p_dev_addr[ETH_ALEN]; 30 31 enum { 32 WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED, 33 WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2, 34 WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART, 35 WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2, 36 WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE 37 } wpa_ptk_state; 38 39 enum { 40 WPA_PTK_GROUP_IDLE = 0, 41 WPA_PTK_GROUP_REKEYNEGOTIATING, 42 WPA_PTK_GROUP_REKEYESTABLISHED, 43 WPA_PTK_GROUP_KEYERROR 44 } wpa_ptk_group_state; 45 46 Boolean Init; 47 Boolean DeauthenticationRequest; 48 Boolean AuthenticationRequest; 49 Boolean ReAuthenticationRequest; 50 Boolean Disconnect; 51 int TimeoutCtr; 52 int GTimeoutCtr; 53 Boolean TimeoutEvt; 54 Boolean EAPOLKeyReceived; 55 Boolean EAPOLKeyPairwise; 56 Boolean EAPOLKeyRequest; 57 Boolean MICVerified; 58 Boolean GUpdateStationKeys; 59 u8 ANonce[WPA_NONCE_LEN]; 60 u8 SNonce[WPA_NONCE_LEN]; 61 u8 alt_SNonce[WPA_NONCE_LEN]; 62 u8 alt_replay_counter[WPA_REPLAY_COUNTER_LEN]; 63 u8 PMK[PMK_LEN]; 64 struct wpa_ptk PTK; 65 Boolean PTK_valid; 66 Boolean pairwise_set; 67 Boolean tk_already_set; 68 int keycount; 69 Boolean Pair; 70 struct wpa_key_replay_counter { 71 u8 counter[WPA_REPLAY_COUNTER_LEN]; 72 Boolean valid; 73 } key_replay[RSNA_MAX_EAPOL_RETRIES], 74 prev_key_replay[RSNA_MAX_EAPOL_RETRIES]; 75 Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i */ 76 Boolean PTKRequest; /* not in IEEE 802.11i state machine */ 77 Boolean has_GTK; 78 Boolean PtkGroupInit; /* init request for PTK Group state machine */ 79 80 u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */ 81 size_t last_rx_eapol_key_len; 82 83 unsigned int changed:1; 84 unsigned int in_step_loop:1; 85 unsigned int pending_deinit:1; 86 unsigned int started:1; 87 unsigned int mgmt_frame_prot:1; 88 unsigned int rx_eapol_key_secure:1; 89 unsigned int update_snonce:1; 90 unsigned int alt_snonce_valid:1; 91 #ifdef CONFIG_IEEE80211R 92 unsigned int ft_completed:1; 93 unsigned int pmk_r1_name_valid:1; 94 #endif /* CONFIG_IEEE80211R */ 95 unsigned int is_wnmsleep:1; 96 97 u8 req_replay_counter[WPA_REPLAY_COUNTER_LEN]; 98 int req_replay_counter_used; 99 100 u8 *wpa_ie; 101 size_t wpa_ie_len; 102 103 enum { 104 WPA_VERSION_NO_WPA = 0 /* WPA not used */, 105 WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */, 106 WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */ 107 } wpa; 108 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ 109 int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */ 110 struct rsn_pmksa_cache_entry *pmksa; 111 112 u32 dot11RSNAStatsTKIPLocalMICFailures; 113 u32 dot11RSNAStatsTKIPRemoteMICFailures; 114 115 #ifdef CONFIG_IEEE80211R 116 u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */ 117 size_t xxkey_len; 118 u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth 119 * Request */ 120 u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */ 121 size_t r0kh_id_len; 122 u8 sup_pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name from EAPOL-Key 123 * message 2/4 */ 124 u8 *assoc_resp_ftie; 125 126 void (*ft_pending_cb)(void *ctx, const u8 *dst, const u8 *bssid, 127 u16 auth_transaction, u16 status, 128 const u8 *ies, size_t ies_len); 129 void *ft_pending_cb_ctx; 130 struct wpabuf *ft_pending_req_ies; 131 u8 ft_pending_pull_nonce[FT_R0KH_R1KH_PULL_NONCE_LEN]; 132 u8 ft_pending_auth_transaction; 133 u8 ft_pending_current_ap[ETH_ALEN]; 134 #endif /* CONFIG_IEEE80211R */ 135 136 int pending_1_of_4_timeout; 137 138 #ifdef CONFIG_P2P 139 u8 ip_addr[4]; 140 #endif /* CONFIG_P2P */ 141 }; 142 143 144 /* per group key state machine data */ 145 struct wpa_group { 146 struct wpa_group *next; 147 int vlan_id; 148 149 Boolean GInit; 150 int GKeyDoneStations; 151 Boolean GTKReKey; 152 int GTK_len; 153 int GN, GM; 154 Boolean GTKAuthenticator; 155 u8 Counter[WPA_NONCE_LEN]; 156 157 enum { 158 WPA_GROUP_GTK_INIT = 0, 159 WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE, 160 WPA_GROUP_FATAL_FAILURE 161 } wpa_group_state; 162 163 u8 GMK[WPA_GMK_LEN]; 164 u8 GTK[2][WPA_GTK_MAX_LEN]; 165 u8 GNonce[WPA_NONCE_LEN]; 166 Boolean changed; 167 Boolean first_sta_seen; 168 Boolean reject_4way_hs_for_entropy; 169 #ifdef CONFIG_IEEE80211W 170 u8 IGTK[2][WPA_IGTK_MAX_LEN]; 171 int GN_igtk, GM_igtk; 172 #endif /* CONFIG_IEEE80211W */ 173 /* Number of references except those in struct wpa_group->next */ 174 unsigned int references; 175 }; 176 177 178 struct wpa_ft_pmk_cache; 179 180 /* per authenticator data */ 181 struct wpa_authenticator { 182 struct wpa_group *group; 183 184 unsigned int dot11RSNAStatsTKIPRemoteMICFailures; 185 u32 dot11RSNAAuthenticationSuiteSelected; 186 u32 dot11RSNAPairwiseCipherSelected; 187 u32 dot11RSNAGroupCipherSelected; 188 u8 dot11RSNAPMKIDUsed[PMKID_LEN]; 189 u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */ 190 u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */ 191 u32 dot11RSNAGroupCipherRequested; /* FIX: update */ 192 unsigned int dot11RSNATKIPCounterMeasuresInvoked; 193 unsigned int dot11RSNA4WayHandshakeFailures; 194 195 struct wpa_stsl_negotiation *stsl_negotiations; 196 197 struct wpa_auth_config conf; 198 struct wpa_auth_callbacks cb; 199 200 u8 *wpa_ie; 201 size_t wpa_ie_len; 202 203 u8 addr[ETH_ALEN]; 204 205 struct rsn_pmksa_cache *pmksa; 206 struct wpa_ft_pmk_cache *ft_pmk_cache; 207 208 #ifdef CONFIG_P2P 209 struct bitfield *ip_pool; 210 #endif /* CONFIG_P2P */ 211 }; 212 213 214 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 215 const u8 *pmkid); 216 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, 217 logger_level level, const char *txt); 218 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, 219 logger_level level, const char *fmt, ...); 220 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, 221 struct wpa_state_machine *sm, int key_info, 222 const u8 *key_rsc, const u8 *nonce, 223 const u8 *kde, size_t kde_len, 224 int keyidx, int encr, int force_version); 225 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, 226 int (*cb)(struct wpa_state_machine *sm, void *ctx), 227 void *cb_ctx); 228 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, 229 int (*cb)(struct wpa_authenticator *a, void *ctx), 230 void *cb_ctx); 231 232 #ifdef CONFIG_PEERKEY 233 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth, 234 struct wpa_stsl_negotiation *neg); 235 void wpa_smk_error(struct wpa_authenticator *wpa_auth, 236 struct wpa_state_machine *sm, 237 const u8 *key_data, size_t key_data_len); 238 void wpa_smk_m1(struct wpa_authenticator *wpa_auth, 239 struct wpa_state_machine *sm, struct wpa_eapol_key *key, 240 const u8 *key_data, size_t key_data_len); 241 void wpa_smk_m3(struct wpa_authenticator *wpa_auth, 242 struct wpa_state_machine *sm, struct wpa_eapol_key *key, 243 const u8 *key_data, size_t key_data_len); 244 #endif /* CONFIG_PEERKEY */ 245 246 #ifdef CONFIG_IEEE80211R 247 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len); 248 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 249 size_t r0kh_id_len, 250 const u8 *anonce, const u8 *snonce, 251 u8 *buf, size_t len, const u8 *subelem, 252 size_t subelem_len); 253 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 254 struct wpa_ptk *ptk); 255 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void); 256 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache); 257 void wpa_ft_install_ptk(struct wpa_state_machine *sm); 258 #endif /* CONFIG_IEEE80211R */ 259 260 #endif /* WPA_AUTH_I_H */ 261