src/ap/wpa_auth.h

   1 /*
   2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator
   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_H
  10 #define WPA_AUTH_H
  11
  12 #include "common/defs.h"
  13 #include "common/eapol_common.h"
  14 #include "common/wpa_common.h"
  15
  16 #ifdef _MSC_VER
  17 #pragma pack(push, 1)
  18 #endif /* _MSC_VER */
  19
  20 /* IEEE Std 802.11r-2008, 11A.10.3 - Remote request/response frame definition
  21  */
  22 struct ft_rrb_frame {
  23         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  24         u8 packet_type; /* FT_PACKET_REQUEST/FT_PACKET_RESPONSE */
  25         le16 action_length; /* little endian length of action_frame */
  26         u8 ap_address[ETH_ALEN];
  27         /*
  28          * Followed by action_length bytes of FT Action frame (from Category
  29          * field to the end of Action Frame body.
  30          */
  31 } STRUCT_PACKED;
  32
  33 #define RSN_REMOTE_FRAME_TYPE_FT_RRB 1
  34
  35 #define FT_PACKET_REQUEST 0
  36 #define FT_PACKET_RESPONSE 1
  37 /* Vendor-specific types for R0KH-R1KH protocol; not defined in 802.11r */
  38 #define FT_PACKET_R0KH_R1KH_PULL 200
  39 #define FT_PACKET_R0KH_R1KH_RESP 201
  40 #define FT_PACKET_R0KH_R1KH_PUSH 202
  41
  42 #define FT_R0KH_R1KH_PULL_DATA_LEN 44
  43 #define FT_R0KH_R1KH_RESP_DATA_LEN 76
  44 #define FT_R0KH_R1KH_PUSH_DATA_LEN 88
  45
  46 struct ft_r0kh_r1kh_pull_frame {
  47         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  48         u8 packet_type; /* FT_PACKET_R0KH_R1KH_PULL */
  49         le16 data_length; /* little endian length of data (44) */
  50         u8 ap_address[ETH_ALEN];
  51
  52         u8 nonce[16];
  53         u8 pmk_r0_name[WPA_PMK_NAME_LEN];
  54         u8 r1kh_id[FT_R1KH_ID_LEN];
  55         u8 s1kh_id[ETH_ALEN];
  56         u8 pad[4]; /* 8-octet boundary for AES key wrap */
  57         u8 key_wrap_extra[8];
  58 } STRUCT_PACKED;
  59
  60 struct ft_r0kh_r1kh_resp_frame {
  61         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  62         u8 packet_type; /* FT_PACKET_R0KH_R1KH_RESP */
  63         le16 data_length; /* little endian length of data (76) */
  64         u8 ap_address[ETH_ALEN];
  65
  66         u8 nonce[16]; /* copied from pull */
  67         u8 r1kh_id[FT_R1KH_ID_LEN]; /* copied from pull */
  68         u8 s1kh_id[ETH_ALEN]; /* copied from pull */
  69         u8 pmk_r1[PMK_LEN];
  70         u8 pmk_r1_name[WPA_PMK_NAME_LEN];
  71         le16 pairwise;
  72         u8 pad[2]; /* 8-octet boundary for AES key wrap */
  73         u8 key_wrap_extra[8];
  74 } STRUCT_PACKED;
  75
  76 struct ft_r0kh_r1kh_push_frame {
  77         u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
  78         u8 packet_type; /* FT_PACKET_R0KH_R1KH_PUSH */
  79         le16 data_length; /* little endian length of data (88) */
  80         u8 ap_address[ETH_ALEN];
  81
  82         /* Encrypted with AES key-wrap */
  83         u8 timestamp[4]; /* current time in seconds since unix epoch, little
  84                           * endian */
  85         u8 r1kh_id[FT_R1KH_ID_LEN];
  86         u8 s1kh_id[ETH_ALEN];
  87         u8 pmk_r0_name[WPA_PMK_NAME_LEN];
  88         u8 pmk_r1[PMK_LEN];
  89         u8 pmk_r1_name[WPA_PMK_NAME_LEN];
  90         le16 pairwise;
  91         u8 pad[6]; /* 8-octet boundary for AES key wrap */
  92         u8 key_wrap_extra[8];
  93 } STRUCT_PACKED;
  94
  95 #ifdef _MSC_VER
  96 #pragma pack(pop)
  97 #endif /* _MSC_VER */
  98
  99
 100 /* per STA state machine data */
 101
 102 struct wpa_authenticator;
 103 struct wpa_state_machine;
 104 struct rsn_pmksa_cache_entry;
 105 struct eapol_state_machine;
 106
 107
 108 struct ft_remote_r0kh {
 109         struct ft_remote_r0kh *next;
 110         u8 addr[ETH_ALEN];
 111         u8 id[FT_R0KH_ID_MAX_LEN];
 112         size_t id_len;
 113         u8 key[16];
 114 };
 115
 116
 117 struct ft_remote_r1kh {
 118         struct ft_remote_r1kh *next;
 119         u8 addr[ETH_ALEN];
 120         u8 id[FT_R1KH_ID_LEN];
 121         u8 key[16];
 122 };
 123
 124
 125 struct wpa_auth_config {
 126         int wpa;
 127         int wpa_key_mgmt;
 128         int wpa_pairwise;
 129         int wpa_group;
 130         int wpa_group_rekey;
 131         int wpa_strict_rekey;
 132         int wpa_gmk_rekey;
 133         int wpa_ptk_rekey;
 134         int rsn_pairwise;
 135         int rsn_preauth;
 136         int eapol_version;
 137         int peerkey;
 138         int wmm_enabled;
 139         int wmm_uapsd;
 140         int disable_pmksa_caching;
 141         int okc;
 142         int tx_status;
 143 #ifdef CONFIG_IEEE80211W
 144         enum mfp_options ieee80211w;
 145 #endif /* CONFIG_IEEE80211W */
 146 #ifdef CONFIG_IEEE80211R
 147 #define SSID_LEN 32
 148         u8 ssid[SSID_LEN];
 149         size_t ssid_len;
 150         u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
 151         u8 r0_key_holder[FT_R0KH_ID_MAX_LEN];
 152         size_t r0_key_holder_len;
 153         u8 r1_key_holder[FT_R1KH_ID_LEN];
 154         u32 r0_key_lifetime;
 155         u32 reassociation_deadline;
 156         struct ft_remote_r0kh *r0kh_list;
 157         struct ft_remote_r1kh *r1kh_list;
 158         int pmk_r1_push;
 159         int ft_over_ds;
 160 #endif /* CONFIG_IEEE80211R */
 161         int disable_gtk;
 162         int ap_mlme;
 163 #ifdef CONFIG_TESTING_OPTIONS
 164         double corrupt_gtk_rekey_mic_probability;
 165 #endif /* CONFIG_TESTING_OPTIONS */
 166 };
 167
 168 typedef enum {
 169         LOGGER_DEBUG, LOGGER_INFO, LOGGER_WARNING
 170 } logger_level;
 171
 172 typedef enum {
 173         WPA_EAPOL_portEnabled, WPA_EAPOL_portValid, WPA_EAPOL_authorized,
 174         WPA_EAPOL_portControl_Auto, WPA_EAPOL_keyRun, WPA_EAPOL_keyAvailable,
 175         WPA_EAPOL_keyDone, WPA_EAPOL_inc_EapolFramesTx
 176 } wpa_eapol_variable;
 177
 178 struct wpa_auth_callbacks {
 179         void *ctx;
 180         void (*logger)(void *ctx, const u8 *addr, logger_level level,
 181                        const char *txt);
 182         void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
 183         int (*mic_failure_report)(void *ctx, const u8 *addr);
 184         void (*set_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var,
 185                           int value);
 186         int (*get_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var);
 187         const u8 * (*get_psk)(void *ctx, const u8 *addr, const u8 *prev_psk);
 188         int (*get_msk)(void *ctx, const u8 *addr, u8 *msk, size_t *len);
 189         int (*set_key)(void *ctx, int vlan_id, enum wpa_alg alg,
 190                        const u8 *addr, int idx, u8 *key, size_t key_len);
 191         int (*get_seqnum)(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         int (*add_tspec)(void *ctx, const u8 *sta_addr, u8 *tspec_ie,
 205                          size_t tspec_ielen);
 206 #endif /* CONFIG_IEEE80211R */
 207 };
 208
 209 struct wpa_authenticator * wpa_init(const u8 *addr,
 210                                     struct wpa_auth_config *conf,
 211                                     struct wpa_auth_callbacks *cb);
 212 int wpa_init_keys(struct wpa_authenticator *wpa_auth);
 213 void wpa_deinit(struct wpa_authenticator *wpa_auth);
 214 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 215                  struct wpa_auth_config *conf);
 216
 217 enum {
 218         WPA_IE_OK, WPA_INVALID_IE, WPA_INVALID_GROUP, WPA_INVALID_PAIRWISE,
 219         WPA_INVALID_AKMP, WPA_NOT_ENABLED, WPA_ALLOC_FAIL,
 220         WPA_MGMT_FRAME_PROTECTION_VIOLATION, WPA_INVALID_MGMT_GROUP_CIPHER,
 221         WPA_INVALID_MDIE, WPA_INVALID_PROTO
 222 };
 223
 224 int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
 225                         struct wpa_state_machine *sm,
 226                         const u8 *wpa_ie, size_t wpa_ie_len,
 227                         const u8 *mdie, size_t mdie_len);
 228 int wpa_auth_uses_mfp(struct wpa_state_machine *sm);
 229 struct wpa_state_machine *
 230 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr);
 231 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 232                             struct wpa_state_machine *sm);
 233 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm);
 234 void wpa_auth_sta_deinit(struct wpa_state_machine *sm);
 235 void wpa_receive(struct wpa_authenticator *wpa_auth,
 236                  struct wpa_state_machine *sm,
 237                  u8 *data, size_t data_len);
 238 typedef enum {
 239         WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
 240         WPA_REAUTH_EAPOL, WPA_ASSOC_FT
 241 } wpa_event;
 242 void wpa_remove_ptk(struct wpa_state_machine *sm);
 243 int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event);
 244 void wpa_auth_sm_notify(struct wpa_state_machine *sm);
 245 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth);
 246 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen);
 247 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen);
 248 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth);
 249 int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
 250 int wpa_auth_get_pairwise(struct wpa_state_machine *sm);
 251 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
 252 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
 253 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
 254                              struct rsn_pmksa_cache_entry *entry);
 255 struct rsn_pmksa_cache_entry *
 256 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm);
 257 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm);
 258 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth,
 259                                size_t *len);
 260 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
 261                        int session_timeout, struct eapol_state_machine *eapol);
 262 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
 263                                const u8 *pmk, size_t len, const u8 *sta_addr,
 264                                int session_timeout,
 265                                struct eapol_state_machine *eapol);
 266 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id);
 267 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
 268                                   struct wpa_state_machine *sm, int ack);
 269
 270 #ifdef CONFIG_IEEE80211R
 271 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
 272                                  size_t max_len, int auth_alg,
 273                                  const u8 *req_ies, size_t req_ies_len);
 274 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
 275                          u16 auth_transaction, const u8 *ies, size_t ies_len,
 276                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
 277                                     u16 auth_transaction, u16 resp,
 278                                     const u8 *ies, size_t ies_len),
 279                          void *ctx);
 280 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
 281                             size_t ies_len);
 282 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len);
 283 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
 284                   const u8 *data, size_t data_len);
 285 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr);
 286 #endif /* CONFIG_IEEE80211R */
 287
 288 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm);
 289 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag);
 290 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos);
 291 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos);
 292
 293 int wpa_auth_uses_sae(struct wpa_state_machine *sm);
 294
 295 #endif /* WPA_AUTH_H */