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