dist/wpa/hostapd/wpa.h

   1 /*
   2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator
   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_H
  16 #define WPA_AUTH_H
  17
  18 #include "eapol_common.h"
  19 #include "wpa_common.h"
  20
  21 #ifdef _MSC_VER
  22 #pragma pack(push, 1)
  23 #endif /* _MSC_VER */
  24
  25 /* IEEE 802.11r/D8.0, 11A.10.3 - Remote request/response frame definition */
  26 struct ft_rrb_frame {
  27         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  28         u8 packet_type; /* FT_PACKET_REQUEST/FT_PACKET_RESPONSE */
  29         u16 action_length; /* little endian length of action_frame */
  30         u8 ap_address[ETH_ALEN];
  31         /*
  32          * Followed by action_length bytes of FT Action frame (from Category
  33          * field to the end of Action Frame body.
  34          */
  35 } STRUCT_PACKED;
  36
  37 #define RSN_REMOTE_FRAME_TYPE_FT_RRB 1
  38
  39 #define FT_PACKET_REQUEST 0
  40 #define FT_PACKET_RESPONSE 1
  41 /* Vendor-specific types for R0KH-R1KH protocol; not defined in 802.11r */
  42 #define FT_PACKET_R0KH_R1KH_PULL 200
  43 #define FT_PACKET_R0KH_R1KH_RESP 201
  44 #define FT_PACKET_R0KH_R1KH_PUSH 202
  45
  46 #ifndef ETH_P_RRB
  47 #define ETH_P_RRB 0x890D
  48 #endif /* ETH_P_RRB */
  49
  50 #define FT_R0KH_R1KH_PULL_DATA_LEN 44
  51 #define FT_R0KH_R1KH_RESP_DATA_LEN 76
  52 #define FT_R0KH_R1KH_PUSH_DATA_LEN 80
  53
  54 struct ft_r0kh_r1kh_pull_frame {
  55         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  56         u8 packet_type; /* FT_PACKET_R0KH_R1KH_PULL */
  57         u16 data_length; /* little endian length of data (44) */
  58         u8 ap_address[ETH_ALEN];
  59
  60         u8 nonce[16];
  61         u8 pmk_r0_name[WPA_PMK_NAME_LEN];
  62         u8 r1kh_id[FT_R1KH_ID_LEN];
  63         u8 s1kh_id[ETH_ALEN];
  64         u8 pad[4]; /* 8-octet boundary for AES key wrap */
  65         u8 key_wrap_extra[8];
  66 } STRUCT_PACKED;
  67
  68 struct ft_r0kh_r1kh_resp_frame {
  69         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  70         u8 packet_type; /* FT_PACKET_R0KH_R1KH_RESP */
  71         u16 data_length; /* little endian length of data (76) */
  72         u8 ap_address[ETH_ALEN];
  73
  74         u8 nonce[16]; /* copied from pull */
  75         u8 r1kh_id[FT_R1KH_ID_LEN]; /* copied from pull */
  76         u8 s1kh_id[ETH_ALEN]; /* copied from pull */
  77         u8 pmk_r1[PMK_LEN];
  78         u8 pmk_r1_name[WPA_PMK_NAME_LEN];
  79         u8 pad[4]; /* 8-octet boundary for AES key wrap */
  80         u8 key_wrap_extra[8];
  81 } STRUCT_PACKED;
  82
  83 struct ft_r0kh_r1kh_push_frame {
  84         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  85         u8 packet_type; /* FT_PACKET_R0KH_R1KH_PUSH */
  86         u16 data_length; /* little endian length of data (80) */
  87         u8 ap_address[ETH_ALEN];
  88
  89         /* Encrypted with AES key-wrap */
  90         u8 timestamp[4]; /* current time in seconds since unix epoch, little
  91                           * endian */
  92         u8 r1kh_id[FT_R1KH_ID_LEN];
  93         u8 s1kh_id[ETH_ALEN];
  94         u8 pmk_r0_name[WPA_PMK_NAME_LEN];
  95         u8 pmk_r1[PMK_LEN];
  96         u8 pmk_r1_name[WPA_PMK_NAME_LEN];
  97         u8 key_wrap_extra[8];
  98 } STRUCT_PACKED;
  99
 100 #ifdef _MSC_VER
 101 #pragma pack(pop)
 102 #endif /* _MSC_VER */
 103
 104
 105 /* per STA state machine data */
 106
 107 struct wpa_authenticator;
 108 struct wpa_state_machine;
 109 struct rsn_pmksa_cache_entry;
 110 struct eapol_state_machine;
 111
 112
 113 struct ft_remote_r0kh {
 114         struct ft_remote_r0kh *next;
 115         u8 addr[ETH_ALEN];
 116         u8 id[FT_R0KH_ID_MAX_LEN];
 117         size_t id_len;
 118         u8 key[16];
 119 };
 120
 121
 122 struct ft_remote_r1kh {
 123         struct ft_remote_r1kh *next;
 124         u8 addr[ETH_ALEN];
 125         u8 id[FT_R1KH_ID_LEN];
 126         u8 key[16];
 127 };
 128
 129
 130 struct wpa_auth_config {
 131         int wpa;
 132         int wpa_key_mgmt;
 133         int wpa_pairwise;
 134         int wpa_group;
 135         int wpa_group_rekey;
 136         int wpa_strict_rekey;
 137         int wpa_gmk_rekey;
 138         int rsn_pairwise;
 139         int rsn_preauth;
 140         int eapol_version;
 141         int peerkey;
 142         int wme_enabled;
 143         int okc;
 144 #ifdef CONFIG_IEEE80211W
 145         enum {
 146                 WPA_NO_IEEE80211W = 0,
 147                 WPA_IEEE80211W_OPTIONAL = 1,
 148                 WPA_IEEE80211W_REQUIRED = 2
 149         } ieee80211w;
 150 #endif /* CONFIG_IEEE80211W */
 151 #ifdef CONFIG_IEEE80211R
 152 #define SSID_LEN 32
 153         u8 ssid[SSID_LEN];
 154         size_t ssid_len;
 155         u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
 156         u8 r0_key_holder[FT_R0KH_ID_MAX_LEN];
 157         size_t r0_key_holder_len;
 158         u8 r1_key_holder[FT_R1KH_ID_LEN];
 159         u32 r0_key_lifetime;
 160         u32 reassociation_deadline;
 161         struct ft_remote_r0kh *r0kh_list;
 162         struct ft_remote_r1kh *r1kh_list;
 163         int pmk_r1_push;
 164 #endif /* CONFIG_IEEE80211R */
 165 };
 166
 167 typedef enum {
 168         LOGGER_DEBUG, LOGGER_INFO, LOGGER_WARNING
 169 } logger_level;
 170
 171 typedef enum {
 172         WPA_EAPOL_portEnabled, WPA_EAPOL_portValid, WPA_EAPOL_authorized,
 173         WPA_EAPOL_portControl_Auto, WPA_EAPOL_keyRun, WPA_EAPOL_keyAvailable,
 174         WPA_EAPOL_keyDone, WPA_EAPOL_inc_EapolFramesTx
 175 } wpa_eapol_variable;
 176
 177 struct wpa_auth_callbacks {
 178         void *ctx;
 179         void (*logger)(void *ctx, const u8 *addr, logger_level level,
 180                        const char *txt);
 181         void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
 182         void (*mic_failure_report)(void *ctx, const u8 *addr);
 183         void (*set_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var,
 184                           int value);
 185         int (*get_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var);
 186         const u8 * (*get_psk)(void *ctx, const u8 *addr, const u8 *prev_psk);
 187         int (*get_msk)(void *ctx, const u8 *addr, u8 *msk, size_t *len);
 188         int (*set_key)(void *ctx, int vlan_id, const char *alg, const u8 *addr,
 189                        int idx, u8 *key, size_t key_len);
 190         int (*get_seqnum)(void *ctx, const u8 *addr, int idx, u8 *seq);
 191         int (*get_seqnum_igtk)(void *ctx, const u8 *addr, int idx, u8 *seq);
 192         int (*send_eapol)(void *ctx, const u8 *addr, const u8 *data,
 193                           size_t data_len, int encrypt);
 194         int (*for_each_sta)(void *ctx, int (*cb)(struct wpa_state_machine *sm,
 195                                                  void *ctx), void *cb_ctx);
 196         int (*for_each_auth)(void *ctx, int (*cb)(struct wpa_authenticator *a,
 197                                                   void *ctx), void *cb_ctx);
 198         int (*send_ether)(void *ctx, const u8 *dst, u16 proto, const u8 *data,
 199                           size_t data_len);
 200 #ifdef CONFIG_IEEE80211R
 201         struct wpa_state_machine * (*add_sta)(void *ctx, const u8 *sta_addr);
 202         int (*send_ft_action)(void *ctx, const u8 *dst,
 203                               const u8 *data, size_t data_len);
 204 #endif /* CONFIG_IEEE80211R */
 205 };
 206
 207 struct wpa_authenticator * wpa_init(const u8 *addr,
 208                                     struct wpa_auth_config *conf,
 209                                     struct wpa_auth_callbacks *cb);
 210 void wpa_deinit(struct wpa_authenticator *wpa_auth);
 211 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 212                  struct wpa_auth_config *conf);
 213
 214 enum {
 215         WPA_IE_OK, WPA_INVALID_IE, WPA_INVALID_GROUP, WPA_INVALID_PAIRWISE,
 216         WPA_INVALID_AKMP, WPA_NOT_ENABLED, WPA_ALLOC_FAIL,
 217         WPA_MGMT_FRAME_PROTECTION_VIOLATION, WPA_INVALID_MGMT_GROUP_CIPHER,
 218         WPA_INVALID_MDIE
 219 };
 220
 221 int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
 222                         struct wpa_state_machine *sm,
 223                         const u8 *wpa_ie, size_t wpa_ie_len,
 224                         const u8 *mdie, size_t mdie_len);
 225 int wpa_auth_uses_mfp(struct wpa_state_machine *sm);
 226 struct wpa_state_machine *
 227 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr);
 228 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 229                              struct wpa_state_machine *sm);
 230 void wpa_auth_sta_deinit(struct wpa_state_machine *sm);
 231 void wpa_receive(struct wpa_authenticator *wpa_auth,
 232                  struct wpa_state_machine *sm,
 233                  u8 *data, size_t data_len);
 234 typedef enum {
 235         WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
 236         WPA_REAUTH_EAPOL, WPA_ASSOC_FT
 237 } wpa_event;
 238 void wpa_remove_ptk(struct wpa_state_machine *sm);
 239 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event);
 240 void wpa_auth_sm_notify(struct wpa_state_machine *sm);
 241 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth);
 242 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen);
 243 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen);
 244 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth);
 245 int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
 246 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
 247 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
 248 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
 249                              struct rsn_pmksa_cache_entry *entry);
 250 struct rsn_pmksa_cache_entry *
 251 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm);
 252 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm);
 253 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth,
 254                                size_t *len);
 255 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
 256                        int session_timeout, struct eapol_state_machine *eapol);
 257 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
 258                                const u8 *pmk, size_t len, const u8 *sta_addr,
 259                                int session_timeout,
 260                                struct eapol_state_machine *eapol);
 261 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id);
 262
 263 #ifdef CONFIG_IEEE80211R
 264 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
 265                                  size_t max_len, int auth_alg);
 266 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
 267                          u16 auth_transaction, const u8 *ies, size_t ies_len,
 268                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
 269                                     u16 auth_transaction, u16 resp,
 270                                     const u8 *ies, size_t ies_len),
 271                          void *ctx);
 272 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
 273                             size_t ies_len);
 274 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len);
 275 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
 276                   const u8 *data, size_t data_len);
 277 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr);
 278 #endif /* CONFIG_IEEE80211R */
 279
 280 #endif /* WPA_AUTH_H */