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 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 u16 disconnect_reason; /* specific reason code to use with 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 unsigned int pmk_len; 63 u8 pmkid[PMKID_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 #ifdef CONFIG_IEEE80211R_AP 90 unsigned int ft_completed:1; 91 unsigned int pmk_r1_name_valid:1; 92 #endif /* CONFIG_IEEE80211R */ 93 unsigned int is_wnmsleep:1; 94 unsigned int pmkid_set: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 u8 *rsnxe; 102 size_t rsnxe_len; 103 104 enum { 105 WPA_VERSION_NO_WPA = 0 /* WPA not used */, 106 WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */, 107 WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */ 108 } wpa; 109 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ 110 int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */ 111 struct rsn_pmksa_cache_entry *pmksa; 112 113 #ifdef CONFIG_IEEE80211R_AP 114 u8 xxkey[PMK_LEN_MAX]; /* PSK or the second 256 bits of MSK, or the 115 * first 384 bits of MSK */ 116 size_t xxkey_len; 117 u8 pmk_r1[PMK_LEN_MAX]; 118 unsigned int pmk_r1_len; 119 u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth 120 * Request */ 121 u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */ 122 size_t r0kh_id_len; 123 u8 sup_pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name from EAPOL-Key 124 * message 2/4 */ 125 u8 *assoc_resp_ftie; 126 127 void (*ft_pending_cb)(void *ctx, const u8 *dst, const u8 *bssid, 128 u16 auth_transaction, u16 status, 129 const u8 *ies, size_t ies_len); 130 void *ft_pending_cb_ctx; 131 struct wpabuf *ft_pending_req_ies; 132 u8 ft_pending_pull_nonce[FT_RRB_NONCE_LEN]; 133 u8 ft_pending_auth_transaction; 134 u8 ft_pending_current_ap[ETH_ALEN]; 135 int ft_pending_pull_left_retries; 136 #endif /* CONFIG_IEEE80211R_AP */ 137 138 int pending_1_of_4_timeout; 139 u32 index; 140 struct rsn_sppamsdu_sup spp_sup; 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_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_LEN]; 170 int GN_igtk, GM_igtk; 171 #endif /* CONFIG_IEEE80211W */ 172 }; 173 174 175 struct wpa_ft_pmk_cache; 176 177 /* per authenticator data */ 178 struct wpa_authenticator { 179 struct wpa_group *group; 180 181 u8 dot11RSNAPMKIDUsed[PMKID_LEN]; 182 183 struct wpa_auth_config conf; 184 185 u8 *wpa_ie; 186 size_t wpa_ie_len; 187 struct rsn_pmksa_cache *pmksa; 188 189 u8 addr[ETH_ALEN]; 190 #ifdef CONFIG_IEEE80211R 191 struct wpa_ft_pmk_cache *ft_pmk_cache; 192 #endif 193 194 }; 195 196 197 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 198 const u8 *pmkid); 199 int wpa_write_rsnxe(struct wpa_auth_config *conf, u8 *buf, size_t len); 200 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, 201 struct wpa_state_machine *sm, int key_info, 202 const u8 *key_rsc, const u8 *nonce, 203 const u8 *kde, size_t kde_len, 204 int keyidx, int encr, int force_version); 205 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, 206 int (*cb)(struct wpa_state_machine *sm, void *ctx), 207 void *cb_ctx); 208 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, 209 int (*cb)(struct wpa_authenticator *a, void *ctx), 210 void *cb_ctx); 211 212 #ifdef CONFIG_IEEE80211R 213 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len); 214 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 215 size_t r0kh_id_len, 216 const u8 *anonce, const u8 *snonce, 217 u8 *buf, size_t len, const u8 *subelem, 218 size_t subelem_len); 219 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 220 struct wpa_ptk *ptk); 221 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void); 222 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache); 223 void wpa_ft_install_ptk(struct wpa_state_machine *sm); 224 #endif /* CONFIG_IEEE80211R */ 225 226 #endif /* WPA_AUTH_I_H */ 227
