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      1 /*
      2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator
      3  * Copyright (c) 2004-2007, Jouni Malinen <j (at) 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 };
    164 
    165 typedef enum {
    166 	LOGGER_DEBUG, LOGGER_INFO, LOGGER_WARNING
    167 } logger_level;
    168 
    169 typedef enum {
    170 	WPA_EAPOL_portEnabled, WPA_EAPOL_portValid, WPA_EAPOL_authorized,
    171 	WPA_EAPOL_portControl_Auto, WPA_EAPOL_keyRun, WPA_EAPOL_keyAvailable,
    172 	WPA_EAPOL_keyDone, WPA_EAPOL_inc_EapolFramesTx
    173 } wpa_eapol_variable;
    174 
    175 struct wpa_auth_callbacks {
    176 	void *ctx;
    177 	void (*logger)(void *ctx, const u8 *addr, logger_level level,
    178 		       const char *txt);
    179 	void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
    180 	void (*mic_failure_report)(void *ctx, const u8 *addr);
    181 	void (*set_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var,
    182 			  int value);
    183 	int (*get_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var);
    184 	const u8 * (*get_psk)(void *ctx, const u8 *addr, const u8 *prev_psk);
    185 	int (*get_msk)(void *ctx, const u8 *addr, u8 *msk, size_t *len);
    186 	int (*set_key)(void *ctx, int vlan_id, enum wpa_alg alg,
    187 		       const u8 *addr, int idx, u8 *key, size_t key_len);
    188 	int (*get_seqnum)(void *ctx, const u8 *addr, int idx, u8 *seq);
    189 	int (*send_eapol)(void *ctx, const u8 *addr, const u8 *data,
    190 			  size_t data_len, int encrypt);
    191 	int (*for_each_sta)(void *ctx, int (*cb)(struct wpa_state_machine *sm,
    192 						 void *ctx), void *cb_ctx);
    193 	int (*for_each_auth)(void *ctx, int (*cb)(struct wpa_authenticator *a,
    194 						  void *ctx), void *cb_ctx);
    195 	int (*send_ether)(void *ctx, const u8 *dst, u16 proto, const u8 *data,
    196 			  size_t data_len);
    197 #ifdef CONFIG_IEEE80211R
    198 	struct wpa_state_machine * (*add_sta)(void *ctx, const u8 *sta_addr);
    199 	int (*send_ft_action)(void *ctx, const u8 *dst,
    200 			      const u8 *data, size_t data_len);
    201 	int (*add_tspec)(void *ctx, const u8 *sta_addr, u8 *tspec_ie,
    202                          size_t tspec_ielen);
    203 #endif /* CONFIG_IEEE80211R */
    204 };
    205 
    206 struct wpa_authenticator * wpa_init(const u8 *addr,
    207 				    struct wpa_auth_config *conf,
    208 				    struct wpa_auth_callbacks *cb);
    209 int wpa_init_keys(struct wpa_authenticator *wpa_auth);
    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, WPA_INVALID_PROTO
    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 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
    229 			    struct wpa_state_machine *sm);
    230 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm);
    231 void wpa_auth_sta_deinit(struct wpa_state_machine *sm);
    232 void wpa_receive(struct wpa_authenticator *wpa_auth,
    233 		 struct wpa_state_machine *sm,
    234 		 u8 *data, size_t data_len);
    235 typedef enum {
    236 	WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
    237 	WPA_REAUTH_EAPOL, WPA_ASSOC_FT
    238 } wpa_event;
    239 void wpa_remove_ptk(struct wpa_state_machine *sm);
    240 int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event);
    241 void wpa_auth_sm_notify(struct wpa_state_machine *sm);
    242 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth);
    243 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen);
    244 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen);
    245 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth);
    246 int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
    247 int wpa_auth_get_pairwise(struct wpa_state_machine *sm);
    248 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
    249 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
    250 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
    251 			     struct rsn_pmksa_cache_entry *entry);
    252 struct rsn_pmksa_cache_entry *
    253 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm);
    254 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm);
    255 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth,
    256 			       size_t *len);
    257 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
    258 		       int session_timeout, struct eapol_state_machine *eapol);
    259 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
    260 			       const u8 *pmk, size_t len, const u8 *sta_addr,
    261 			       int session_timeout,
    262 			       struct eapol_state_machine *eapol);
    263 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id);
    264 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
    265 				  struct wpa_state_machine *sm, int ack);
    266 
    267 #ifdef CONFIG_IEEE80211R
    268 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
    269 				 size_t max_len, int auth_alg,
    270 				 const u8 *req_ies, size_t req_ies_len);
    271 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
    272 			 u16 auth_transaction, const u8 *ies, size_t ies_len,
    273 			 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
    274 				    u16 auth_transaction, u16 resp,
    275 				    const u8 *ies, size_t ies_len),
    276 			 void *ctx);
    277 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
    278 			    size_t ies_len);
    279 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len);
    280 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
    281 		  const u8 *data, size_t data_len);
    282 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr);
    283 #endif /* CONFIG_IEEE80211R */
    284 
    285 #ifdef CONFIG_IEEE80211V
    286 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm);
    287 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag);
    288 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos);
    289 #ifdef CONFIG_IEEE80211W
    290 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos);
    291 #endif /* CONFIG_IEEE80211W */
    292 #endif /* CONFIG_IEEE80211V */
    293 
    294 #endif /* WPA_AUTH_H */
    295