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 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 PMK[PMK_LEN]; 62 struct wpa_ptk PTK; 63 Boolean PTK_valid; 64 Boolean pairwise_set; 65 int keycount; 66 Boolean Pair; 67 struct wpa_key_replay_counter { 68 u8 counter[WPA_REPLAY_COUNTER_LEN]; 69 Boolean valid; 70 } key_replay[RSNA_MAX_EAPOL_RETRIES], 71 prev_key_replay[RSNA_MAX_EAPOL_RETRIES]; 72 Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i */ 73 Boolean PTKRequest; /* not in IEEE 802.11i state machine */ 74 Boolean has_GTK; 75 Boolean PtkGroupInit; /* init request for PTK Group state machine */ 76 77 u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */ 78 size_t last_rx_eapol_key_len; 79 80 unsigned int changed:1; 81 unsigned int in_step_loop:1; 82 unsigned int pending_deinit:1; 83 unsigned int started:1; 84 unsigned int mgmt_frame_prot:1; 85 unsigned int rx_eapol_key_secure:1; 86 unsigned int update_snonce:1; 87 #ifdef CONFIG_IEEE80211R 88 unsigned int ft_completed:1; 89 unsigned int pmk_r1_name_valid:1; 90 #endif /* CONFIG_IEEE80211R */ 91 unsigned int is_wnmsleep:1; 92 93 u8 req_replay_counter[WPA_REPLAY_COUNTER_LEN]; 94 int req_replay_counter_used; 95 96 u8 *wpa_ie; 97 size_t wpa_ie_len; 98 99 enum { 100 WPA_VERSION_NO_WPA = 0 /* WPA not used */, 101 WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */, 102 WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */ 103 } wpa; 104 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ 105 int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */ 106 struct rsn_pmksa_cache_entry *pmksa; 107 108 u32 dot11RSNAStatsTKIPLocalMICFailures; 109 u32 dot11RSNAStatsTKIPRemoteMICFailures; 110 111 #ifdef CONFIG_IEEE80211R 112 u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */ 113 size_t xxkey_len; 114 u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth 115 * Request */ 116 u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */ 117 size_t r0kh_id_len; 118 u8 sup_pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name from EAPOL-Key 119 * message 2/4 */ 120 u8 *assoc_resp_ftie; 121 #endif /* CONFIG_IEEE80211R */ 122 123 int pending_1_of_4_timeout; 124 125 #ifdef CONFIG_P2P 126 u8 ip_addr[4]; 127 #endif /* CONFIG_P2P */ 128 }; 129 130 131 /* per group key state machine data */ 132 struct wpa_group { 133 struct wpa_group *next; 134 int vlan_id; 135 136 Boolean GInit; 137 int GKeyDoneStations; 138 Boolean GTKReKey; 139 int GTK_len; 140 int GN, GM; 141 Boolean GTKAuthenticator; 142 u8 Counter[WPA_NONCE_LEN]; 143 144 enum { 145 WPA_GROUP_GTK_INIT = 0, 146 WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE, 147 WPA_GROUP_FATAL_FAILURE 148 } wpa_group_state; 149 150 u8 GMK[WPA_GMK_LEN]; 151 u8 GTK[2][WPA_GTK_MAX_LEN]; 152 u8 GNonce[WPA_NONCE_LEN]; 153 Boolean changed; 154 Boolean first_sta_seen; 155 Boolean reject_4way_hs_for_entropy; 156 #ifdef CONFIG_IEEE80211W 157 u8 IGTK[2][WPA_IGTK_LEN]; 158 int GN_igtk, GM_igtk; 159 #endif /* CONFIG_IEEE80211W */ 160 }; 161 162 163 struct wpa_ft_pmk_cache; 164 165 /* per authenticator data */ 166 struct wpa_authenticator { 167 struct wpa_group *group; 168 169 unsigned int dot11RSNAStatsTKIPRemoteMICFailures; 170 u32 dot11RSNAAuthenticationSuiteSelected; 171 u32 dot11RSNAPairwiseCipherSelected; 172 u32 dot11RSNAGroupCipherSelected; 173 u8 dot11RSNAPMKIDUsed[PMKID_LEN]; 174 u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */ 175 u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */ 176 u32 dot11RSNAGroupCipherRequested; /* FIX: update */ 177 unsigned int dot11RSNATKIPCounterMeasuresInvoked; 178 unsigned int dot11RSNA4WayHandshakeFailures; 179 180 struct wpa_stsl_negotiation *stsl_negotiations; 181 182 struct wpa_auth_config conf; 183 struct wpa_auth_callbacks cb; 184 185 u8 *wpa_ie; 186 size_t wpa_ie_len; 187 188 u8 addr[ETH_ALEN]; 189 190 struct rsn_pmksa_cache *pmksa; 191 struct wpa_ft_pmk_cache *ft_pmk_cache; 192 193 #ifdef CONFIG_P2P 194 struct bitfield *ip_pool; 195 #endif /* CONFIG_P2P */ 196 }; 197 198 199 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 200 const u8 *pmkid); 201 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, 202 logger_level level, const char *txt); 203 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, 204 logger_level level, const char *fmt, ...); 205 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, 206 struct wpa_state_machine *sm, int key_info, 207 const u8 *key_rsc, const u8 *nonce, 208 const u8 *kde, size_t kde_len, 209 int keyidx, int encr, int force_version); 210 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, 211 int (*cb)(struct wpa_state_machine *sm, void *ctx), 212 void *cb_ctx); 213 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, 214 int (*cb)(struct wpa_authenticator *a, void *ctx), 215 void *cb_ctx); 216 217 #ifdef CONFIG_PEERKEY 218 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth, 219 struct wpa_stsl_negotiation *neg); 220 void wpa_smk_error(struct wpa_authenticator *wpa_auth, 221 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 222 void wpa_smk_m1(struct wpa_authenticator *wpa_auth, 223 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 224 void wpa_smk_m3(struct wpa_authenticator *wpa_auth, 225 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 226 #endif /* CONFIG_PEERKEY */ 227 228 #ifdef CONFIG_IEEE80211R 229 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len); 230 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 231 size_t r0kh_id_len, 232 const u8 *anonce, const u8 *snonce, 233 u8 *buf, size_t len, const u8 *subelem, 234 size_t subelem_len); 235 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 236 struct wpa_ptk *ptk, size_t ptk_len); 237 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void); 238 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache); 239 void wpa_ft_install_ptk(struct wpa_state_machine *sm); 240 #endif /* CONFIG_IEEE80211R */ 241 242 #endif /* WPA_AUTH_I_H */ 243