1 /* 2 * Internal WPA/RSN supplicant state machine definitions 3 * Copyright (c) 2004-2010, 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_I_H 16 #define WPA_I_H 17 18 #include "utils/list.h" 19 20 struct wpa_peerkey; 21 struct wpa_eapol_key; 22 23 /** 24 * struct wpa_sm - Internal WPA state machine data 25 */ 26 struct wpa_sm { 27 u8 pmk[PMK_LEN]; 28 size_t pmk_len; 29 struct wpa_ptk ptk, tptk; 30 int ptk_set, tptk_set; 31 u8 snonce[WPA_NONCE_LEN]; 32 u8 anonce[WPA_NONCE_LEN]; /* ANonce from the last 1/4 msg */ 33 int renew_snonce; 34 u8 rx_replay_counter[WPA_REPLAY_COUNTER_LEN]; 35 int rx_replay_counter_set; 36 u8 request_counter[WPA_REPLAY_COUNTER_LEN]; 37 38 struct eapol_sm *eapol; /* EAPOL state machine from upper level code */ 39 40 struct rsn_pmksa_cache *pmksa; /* PMKSA cache */ 41 struct rsn_pmksa_cache_entry *cur_pmksa; /* current PMKSA entry */ 42 struct dl_list pmksa_candidates; 43 44 struct l2_packet_data *l2_preauth; 45 struct l2_packet_data *l2_preauth_br; 46 u8 preauth_bssid[ETH_ALEN]; /* current RSN pre-auth peer or 47 * 00:00:00:00:00:00 if no pre-auth is 48 * in progress */ 49 struct eapol_sm *preauth_eapol; 50 51 struct wpa_sm_ctx *ctx; 52 53 void *scard_ctx; /* context for smartcard callbacks */ 54 int fast_reauth; /* whether EAP fast re-authentication is enabled */ 55 56 void *network_ctx; 57 int peerkey_enabled; 58 int allowed_pairwise_cipher; /* bitfield of WPA_CIPHER_* */ 59 int proactive_key_caching; 60 int eap_workaround; 61 void *eap_conf_ctx; 62 u8 ssid[32]; 63 size_t ssid_len; 64 int wpa_ptk_rekey; 65 66 u8 own_addr[ETH_ALEN]; 67 const char *ifname; 68 const char *bridge_ifname; 69 u8 bssid[ETH_ALEN]; 70 71 unsigned int dot11RSNAConfigPMKLifetime; 72 unsigned int dot11RSNAConfigPMKReauthThreshold; 73 unsigned int dot11RSNAConfigSATimeout; 74 75 unsigned int dot11RSNA4WayHandshakeFailures; 76 77 /* Selected configuration (based on Beacon/ProbeResp WPA IE) */ 78 unsigned int proto; 79 unsigned int pairwise_cipher; 80 unsigned int group_cipher; 81 unsigned int key_mgmt; 82 unsigned int mgmt_group_cipher; 83 84 int rsn_enabled; /* Whether RSN is enabled in configuration */ 85 int mfp; /* 0 = disabled, 1 = optional, 2 = mandatory */ 86 87 u8 *assoc_wpa_ie; /* Own WPA/RSN IE from (Re)AssocReq */ 88 size_t assoc_wpa_ie_len; 89 u8 *ap_wpa_ie, *ap_rsn_ie; 90 size_t ap_wpa_ie_len, ap_rsn_ie_len; 91 92 #ifdef CONFIG_PEERKEY 93 struct wpa_peerkey *peerkey; 94 #endif /* CONFIG_PEERKEY */ 95 96 #ifdef CONFIG_IEEE80211R 97 u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */ 98 size_t xxkey_len; 99 u8 pmk_r0[PMK_LEN]; 100 u8 pmk_r0_name[WPA_PMK_NAME_LEN]; 101 u8 pmk_r1[PMK_LEN]; 102 u8 pmk_r1_name[WPA_PMK_NAME_LEN]; 103 u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN]; 104 u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; 105 size_t r0kh_id_len; 106 u8 r1kh_id[FT_R1KH_ID_LEN]; 107 int ft_completed; 108 int over_the_ds_in_progress; 109 u8 target_ap[ETH_ALEN]; /* over-the-DS target AP */ 110 int set_ptk_after_assoc; 111 u8 mdie_ft_capab; /* FT Capability and Policy from target AP MDIE */ 112 u8 *assoc_resp_ies; /* MDIE and FTIE from (Re)Association Response */ 113 size_t assoc_resp_ies_len; 114 #endif /* CONFIG_IEEE80211R */ 115 }; 116 117 118 static inline void wpa_sm_set_state(struct wpa_sm *sm, enum wpa_states state) 119 { 120 WPA_ASSERT(sm->ctx->set_state); 121 sm->ctx->set_state(sm->ctx->ctx, state); 122 } 123 124 static inline enum wpa_states wpa_sm_get_state(struct wpa_sm *sm) 125 { 126 WPA_ASSERT(sm->ctx->get_state); 127 return sm->ctx->get_state(sm->ctx->ctx); 128 } 129 130 static inline void wpa_sm_deauthenticate(struct wpa_sm *sm, int reason_code) 131 { 132 WPA_ASSERT(sm->ctx->deauthenticate); 133 sm->ctx->deauthenticate(sm->ctx->ctx, reason_code); 134 } 135 136 static inline void wpa_sm_disassociate(struct wpa_sm *sm, int reason_code) 137 { 138 WPA_ASSERT(sm->ctx->disassociate); 139 sm->ctx->disassociate(sm->ctx->ctx, reason_code); 140 } 141 142 static inline int wpa_sm_set_key(struct wpa_sm *sm, enum wpa_alg alg, 143 const u8 *addr, int key_idx, int set_tx, 144 const u8 *seq, size_t seq_len, 145 const u8 *key, size_t key_len) 146 { 147 WPA_ASSERT(sm->ctx->set_key); 148 return sm->ctx->set_key(sm->ctx->ctx, alg, addr, key_idx, set_tx, 149 seq, seq_len, key, key_len); 150 } 151 152 static inline void * wpa_sm_get_network_ctx(struct wpa_sm *sm) 153 { 154 WPA_ASSERT(sm->ctx->get_network_ctx); 155 return sm->ctx->get_network_ctx(sm->ctx->ctx); 156 } 157 158 static inline int wpa_sm_get_bssid(struct wpa_sm *sm, u8 *bssid) 159 { 160 WPA_ASSERT(sm->ctx->get_bssid); 161 return sm->ctx->get_bssid(sm->ctx->ctx, bssid); 162 } 163 164 static inline int wpa_sm_ether_send(struct wpa_sm *sm, const u8 *dest, 165 u16 proto, const u8 *buf, size_t len) 166 { 167 WPA_ASSERT(sm->ctx->ether_send); 168 return sm->ctx->ether_send(sm->ctx->ctx, dest, proto, buf, len); 169 } 170 171 static inline int wpa_sm_get_beacon_ie(struct wpa_sm *sm) 172 { 173 WPA_ASSERT(sm->ctx->get_beacon_ie); 174 return sm->ctx->get_beacon_ie(sm->ctx->ctx); 175 } 176 177 static inline void wpa_sm_cancel_auth_timeout(struct wpa_sm *sm) 178 { 179 WPA_ASSERT(sm->ctx->cancel_auth_timeout); 180 sm->ctx->cancel_auth_timeout(sm->ctx->ctx); 181 } 182 183 static inline u8 * wpa_sm_alloc_eapol(struct wpa_sm *sm, u8 type, 184 const void *data, u16 data_len, 185 size_t *msg_len, void **data_pos) 186 { 187 WPA_ASSERT(sm->ctx->alloc_eapol); 188 return sm->ctx->alloc_eapol(sm->ctx->ctx, type, data, data_len, 189 msg_len, data_pos); 190 } 191 192 static inline int wpa_sm_add_pmkid(struct wpa_sm *sm, const u8 *bssid, 193 const u8 *pmkid) 194 { 195 WPA_ASSERT(sm->ctx->add_pmkid); 196 return sm->ctx->add_pmkid(sm->ctx->ctx, bssid, pmkid); 197 } 198 199 static inline int wpa_sm_remove_pmkid(struct wpa_sm *sm, const u8 *bssid, 200 const u8 *pmkid) 201 { 202 WPA_ASSERT(sm->ctx->remove_pmkid); 203 return sm->ctx->remove_pmkid(sm->ctx->ctx, bssid, pmkid); 204 } 205 206 static inline int wpa_sm_mlme_setprotection(struct wpa_sm *sm, const u8 *addr, 207 int protect_type, int key_type) 208 { 209 WPA_ASSERT(sm->ctx->mlme_setprotection); 210 return sm->ctx->mlme_setprotection(sm->ctx->ctx, addr, protect_type, 211 key_type); 212 } 213 214 static inline int wpa_sm_update_ft_ies(struct wpa_sm *sm, const u8 *md, 215 const u8 *ies, size_t ies_len) 216 { 217 if (sm->ctx->update_ft_ies) 218 return sm->ctx->update_ft_ies(sm->ctx->ctx, md, ies, ies_len); 219 return -1; 220 } 221 222 static inline int wpa_sm_send_ft_action(struct wpa_sm *sm, u8 action, 223 const u8 *target_ap, 224 const u8 *ies, size_t ies_len) 225 { 226 if (sm->ctx->send_ft_action) 227 return sm->ctx->send_ft_action(sm->ctx->ctx, action, target_ap, 228 ies, ies_len); 229 return -1; 230 } 231 232 static inline int wpa_sm_mark_authenticated(struct wpa_sm *sm, 233 const u8 *target_ap) 234 { 235 if (sm->ctx->mark_authenticated) 236 return sm->ctx->mark_authenticated(sm->ctx->ctx, target_ap); 237 return -1; 238 } 239 240 241 void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck, 242 int ver, const u8 *dest, u16 proto, 243 u8 *msg, size_t msg_len, u8 *key_mic); 244 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, 245 const struct wpa_eapol_key *key, 246 int ver, const u8 *nonce, 247 const u8 *wpa_ie, size_t wpa_ie_len, 248 struct wpa_ptk *ptk); 249 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 250 const struct wpa_eapol_key *key, 251 u16 ver, u16 key_info, 252 const u8 *kde, size_t kde_len, 253 struct wpa_ptk *ptk); 254 255 int wpa_derive_ptk_ft(struct wpa_sm *sm, const unsigned char *src_addr, 256 const struct wpa_eapol_key *key, 257 struct wpa_ptk *ptk, size_t ptk_len); 258 259 #endif /* WPA_I_H */ 260