1 /* 2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator: Internal definitions 3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef WPA_AUTH_I_H 16 #define WPA_AUTH_I_H 17 18 /* max(dot11RSNAConfigGroupUpdateCount,dot11RSNAConfigPairwiseUpdateCount) */ 19 #define RSNA_MAX_EAPOL_RETRIES 4 20 21 struct wpa_group; 22 23 struct wpa_stsl_negotiation { 24 struct wpa_stsl_negotiation *next; 25 u8 initiator[ETH_ALEN]; 26 u8 peer[ETH_ALEN]; 27 }; 28 29 30 struct wpa_state_machine { 31 struct wpa_authenticator *wpa_auth; 32 struct wpa_group *group; 33 34 u8 addr[ETH_ALEN]; 35 36 enum { 37 WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED, 38 WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2, 39 WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART, 40 WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2, 41 WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE 42 } wpa_ptk_state; 43 44 enum { 45 WPA_PTK_GROUP_IDLE = 0, 46 WPA_PTK_GROUP_REKEYNEGOTIATING, 47 WPA_PTK_GROUP_REKEYESTABLISHED, 48 WPA_PTK_GROUP_KEYERROR 49 } wpa_ptk_group_state; 50 51 Boolean Init; 52 Boolean DeauthenticationRequest; 53 Boolean AuthenticationRequest; 54 Boolean ReAuthenticationRequest; 55 Boolean Disconnect; 56 int TimeoutCtr; 57 int GTimeoutCtr; 58 Boolean TimeoutEvt; 59 Boolean EAPOLKeyReceived; 60 Boolean EAPOLKeyPairwise; 61 Boolean EAPOLKeyRequest; 62 Boolean MICVerified; 63 Boolean GUpdateStationKeys; 64 u8 ANonce[WPA_NONCE_LEN]; 65 u8 SNonce[WPA_NONCE_LEN]; 66 u8 PMK[PMK_LEN]; 67 struct wpa_ptk PTK; 68 Boolean PTK_valid; 69 Boolean pairwise_set; 70 int keycount; 71 Boolean Pair; 72 struct { 73 u8 counter[WPA_REPLAY_COUNTER_LEN]; 74 Boolean valid; 75 } key_replay[RSNA_MAX_EAPOL_RETRIES]; 76 Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i */ 77 Boolean PTKRequest; /* not in IEEE 802.11i state machine */ 78 Boolean has_GTK; 79 Boolean PtkGroupInit; /* init request for PTK Group state machine */ 80 81 u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */ 82 size_t last_rx_eapol_key_len; 83 84 unsigned int changed:1; 85 unsigned int in_step_loop:1; 86 unsigned int pending_deinit:1; 87 unsigned int started:1; 88 unsigned int mgmt_frame_prot:1; 89 #ifdef CONFIG_IEEE80211R 90 unsigned int ft_completed:1; 91 unsigned int pmk_r1_name_valid:1; 92 #endif /* CONFIG_IEEE80211R */ 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 }; 124 125 126 /* per group key state machine data */ 127 struct wpa_group { 128 struct wpa_group *next; 129 int vlan_id; 130 131 Boolean GInit; 132 int GKeyDoneStations; 133 Boolean GTKReKey; 134 int GTK_len; 135 int GN, GM; 136 Boolean GTKAuthenticator; 137 u8 Counter[WPA_NONCE_LEN]; 138 139 enum { 140 WPA_GROUP_GTK_INIT = 0, 141 WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE 142 } wpa_group_state; 143 144 u8 GMK[WPA_GMK_LEN]; 145 u8 GTK[2][WPA_GTK_MAX_LEN]; 146 u8 GNonce[WPA_NONCE_LEN]; 147 Boolean changed; 148 #ifdef CONFIG_IEEE80211W 149 u8 IGTK[2][WPA_IGTK_LEN]; 150 int GN_igtk, GM_igtk; 151 #endif /* CONFIG_IEEE80211W */ 152 }; 153 154 155 struct wpa_ft_pmk_cache; 156 157 /* per authenticator data */ 158 struct wpa_authenticator { 159 struct wpa_group *group; 160 161 unsigned int dot11RSNAStatsTKIPRemoteMICFailures; 162 u32 dot11RSNAAuthenticationSuiteSelected; 163 u32 dot11RSNAPairwiseCipherSelected; 164 u32 dot11RSNAGroupCipherSelected; 165 u8 dot11RSNAPMKIDUsed[PMKID_LEN]; 166 u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */ 167 u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */ 168 u32 dot11RSNAGroupCipherRequested; /* FIX: update */ 169 unsigned int dot11RSNATKIPCounterMeasuresInvoked; 170 unsigned int dot11RSNA4WayHandshakeFailures; 171 172 struct wpa_stsl_negotiation *stsl_negotiations; 173 174 struct wpa_auth_config conf; 175 struct wpa_auth_callbacks cb; 176 177 u8 *wpa_ie; 178 size_t wpa_ie_len; 179 180 u8 addr[ETH_ALEN]; 181 182 struct rsn_pmksa_cache *pmksa; 183 struct wpa_ft_pmk_cache *ft_pmk_cache; 184 }; 185 186 187 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 188 const u8 *pmkid); 189 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, 190 logger_level level, const char *txt); 191 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, 192 logger_level level, const char *fmt, ...); 193 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, 194 struct wpa_state_machine *sm, int key_info, 195 const u8 *key_rsc, const u8 *nonce, 196 const u8 *kde, size_t kde_len, 197 int keyidx, int encr, int force_version); 198 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, 199 int (*cb)(struct wpa_state_machine *sm, void *ctx), 200 void *cb_ctx); 201 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, 202 int (*cb)(struct wpa_authenticator *a, void *ctx), 203 void *cb_ctx); 204 205 #ifdef CONFIG_PEERKEY 206 int wpa_stsl_remove(struct wpa_authenticator *wpa_auth, 207 struct wpa_stsl_negotiation *neg); 208 void wpa_smk_error(struct wpa_authenticator *wpa_auth, 209 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 210 void wpa_smk_m1(struct wpa_authenticator *wpa_auth, 211 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 212 void wpa_smk_m3(struct wpa_authenticator *wpa_auth, 213 struct wpa_state_machine *sm, struct wpa_eapol_key *key); 214 #endif /* CONFIG_PEERKEY */ 215 216 #ifdef CONFIG_IEEE80211R 217 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len); 218 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 219 size_t r0kh_id_len, 220 const u8 *anonce, const u8 *snonce, 221 u8 *buf, size_t len, const u8 *subelem, 222 size_t subelem_len); 223 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 224 struct wpa_ptk *ptk, size_t ptk_len); 225 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void); 226 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache); 227 void wpa_ft_install_ptk(struct wpa_state_machine *sm); 228 #endif /* CONFIG_IEEE80211R */ 229 230 #endif /* WPA_AUTH_I_H */ 231