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      1 /*
      2  * Wi-Fi Protected Setup - internal definitions
      3  * Copyright (c) 2008-2012, 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 WPS_I_H
     10 #define WPS_I_H
     11 
     12 #include "wps.h"
     13 #include "wps_attr_parse.h"
     14 
     15 struct wps_nfc_pw_token;
     16 
     17 /**
     18  * struct wps_data - WPS registration protocol data
     19  *
     20  * This data is stored at the EAP-WSC server/peer method and it is kept for a
     21  * single registration protocol run.
     22  */
     23 struct wps_data {
     24 	/**
     25 	 * wps - Pointer to long term WPS context
     26 	 */
     27 	struct wps_context *wps;
     28 
     29 	/**
     30 	 * registrar - Whether this end is a Registrar
     31 	 */
     32 	int registrar;
     33 
     34 	/**
     35 	 * er - Whether the local end is an external registrar
     36 	 */
     37 	int er;
     38 
     39 	enum {
     40 		/* Enrollee states */
     41 		SEND_M1, RECV_M2, SEND_M3, RECV_M4, SEND_M5, RECV_M6, SEND_M7,
     42 		RECV_M8, RECEIVED_M2D, WPS_MSG_DONE, RECV_ACK, WPS_FINISHED,
     43 		SEND_WSC_NACK,
     44 
     45 		/* Registrar states */
     46 		RECV_M1, SEND_M2, RECV_M3, SEND_M4, RECV_M5, SEND_M6,
     47 		RECV_M7, SEND_M8, RECV_DONE, SEND_M2D, RECV_M2D_ACK
     48 	} state;
     49 
     50 	u8 uuid_e[WPS_UUID_LEN];
     51 	u8 uuid_r[WPS_UUID_LEN];
     52 	u8 mac_addr_e[ETH_ALEN];
     53 	u8 nonce_e[WPS_NONCE_LEN];
     54 	u8 nonce_r[WPS_NONCE_LEN];
     55 	u8 psk1[WPS_PSK_LEN];
     56 	u8 psk2[WPS_PSK_LEN];
     57 	u8 snonce[2 * WPS_SECRET_NONCE_LEN];
     58 	u8 peer_hash1[WPS_HASH_LEN];
     59 	u8 peer_hash2[WPS_HASH_LEN];
     60 
     61 	struct wpabuf *dh_privkey;
     62 	struct wpabuf *dh_pubkey_e;
     63 	struct wpabuf *dh_pubkey_r;
     64 	u8 authkey[WPS_AUTHKEY_LEN];
     65 	u8 keywrapkey[WPS_KEYWRAPKEY_LEN];
     66 	u8 emsk[WPS_EMSK_LEN];
     67 
     68 	struct wpabuf *last_msg;
     69 
     70 	u8 *dev_password;
     71 	size_t dev_password_len;
     72 	u16 dev_pw_id;
     73 	int pbc;
     74 	u8 *alt_dev_password;
     75 	size_t alt_dev_password_len;
     76 	u16 alt_dev_pw_id;
     77 
     78 	u8 peer_pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
     79 	int peer_pubkey_hash_set;
     80 
     81 	/**
     82 	 * request_type - Request Type attribute from (Re)AssocReq
     83 	 */
     84 	u8 request_type;
     85 
     86 	/**
     87 	 * encr_type - Available encryption types
     88 	 */
     89 	u16 encr_type;
     90 
     91 	/**
     92 	 * auth_type - Available authentication types
     93 	 */
     94 	u16 auth_type;
     95 
     96 	u8 *new_psk;
     97 	size_t new_psk_len;
     98 
     99 	int wps_pin_revealed;
    100 	struct wps_credential cred;
    101 
    102 	struct wps_device_data peer_dev;
    103 
    104 	/**
    105 	 * config_error - Configuration Error value to be used in NACK
    106 	 */
    107 	u16 config_error;
    108 	u16 error_indication;
    109 
    110 	int ext_reg;
    111 	int int_reg;
    112 
    113 	struct wps_credential *new_ap_settings;
    114 
    115 	void *dh_ctx;
    116 
    117 	void (*ap_settings_cb)(void *ctx, const struct wps_credential *cred);
    118 	void *ap_settings_cb_ctx;
    119 
    120 	struct wps_credential *use_cred;
    121 
    122 	int use_psk_key;
    123 	u8 p2p_dev_addr[ETH_ALEN]; /* P2P Device Address of the client or
    124 				    * 00:00:00:00:00:00 if not a P2p client */
    125 	int pbc_in_m1;
    126 
    127 	struct wps_nfc_pw_token *nfc_pw_token;
    128 };
    129 
    130 
    131 /* wps_common.c */
    132 void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
    133 	     const char *label, u8 *res, size_t res_len);
    134 int wps_derive_keys(struct wps_data *wps);
    135 void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
    136 		    size_t dev_passwd_len);
    137 struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
    138 					  size_t encr_len);
    139 void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg,
    140 		    u16 config_error, u16 error_indication, const u8 *mac_addr);
    141 void wps_success_event(struct wps_context *wps, const u8 *mac_addr);
    142 void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part,
    143 			     const u8 *mac_addr);
    144 void wps_pbc_overlap_event(struct wps_context *wps);
    145 void wps_pbc_timeout_event(struct wps_context *wps);
    146 void wps_pbc_active_event(struct wps_context *wps);
    147 void wps_pbc_disable_event(struct wps_context *wps);
    148 
    149 struct wpabuf * wps_build_wsc_ack(struct wps_data *wps);
    150 struct wpabuf * wps_build_wsc_nack(struct wps_data *wps);
    151 
    152 /* wps_attr_build.c */
    153 int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg);
    154 int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type);
    155 int wps_build_resp_type(struct wpabuf *msg, enum wps_response_type type);
    156 int wps_build_config_methods(struct wpabuf *msg, u16 methods);
    157 int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid);
    158 int wps_build_dev_password_id(struct wpabuf *msg, u16 id);
    159 int wps_build_config_error(struct wpabuf *msg, u16 err);
    160 int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg);
    161 int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg);
    162 int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
    163 			    struct wpabuf *plain);
    164 int wps_build_version(struct wpabuf *msg);
    165 int wps_build_wfa_ext(struct wpabuf *msg, int req_to_enroll,
    166 		      const u8 *auth_macs, size_t auth_macs_count);
    167 int wps_build_msg_type(struct wpabuf *msg, enum wps_msg_type msg_type);
    168 int wps_build_enrollee_nonce(struct wps_data *wps, struct wpabuf *msg);
    169 int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg);
    170 int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg);
    171 int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg);
    172 int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg);
    173 int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg);
    174 int wps_build_oob_dev_pw(struct wpabuf *msg, u16 dev_pw_id,
    175 			 const struct wpabuf *pubkey, const u8 *dev_pw,
    176 			 size_t dev_pw_len);
    177 struct wpabuf * wps_ie_encapsulate(struct wpabuf *data);
    178 int wps_build_mac_addr(struct wpabuf *msg, const u8 *addr);
    179 int wps_build_rf_bands_attr(struct wpabuf *msg, u8 rf_bands);
    180 int wps_build_ap_channel(struct wpabuf *msg, u16 ap_channel);
    181 
    182 /* wps_attr_process.c */
    183 int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
    184 			      const struct wpabuf *msg);
    185 int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
    186 			      const u8 *key_wrap_auth);
    187 int wps_process_cred(struct wps_parse_attr *attr,
    188 		     struct wps_credential *cred);
    189 int wps_process_ap_settings(struct wps_parse_attr *attr,
    190 			    struct wps_credential *cred);
    191 
    192 /* wps_enrollee.c */
    193 struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
    194 				     enum wsc_op_code *op_code);
    195 enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
    196 					      enum wsc_op_code op_code,
    197 					      const struct wpabuf *msg);
    198 
    199 /* wps_registrar.c */
    200 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
    201 				      enum wsc_op_code *op_code);
    202 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
    203 					       enum wsc_op_code op_code,
    204 					       const struct wpabuf *msg);
    205 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg);
    206 int wps_device_store(struct wps_registrar *reg,
    207 		     struct wps_device_data *dev, const u8 *uuid);
    208 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
    209 					      u16 dev_pw_id);
    210 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count);
    211 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
    212 			      const u8 *addr, const u8 *uuid_e);
    213 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
    214 				       struct wps_nfc_pw_token *token);
    215 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
    216 		   const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len);
    217 
    218 #endif /* WPS_I_H */
    219