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1 /*
2  * Wi-Fi Protected Setup - internal definitions
3  * Copyright (c) 2008-2012, 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 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 	int multi_ap_backhaul_sta;
130 };
131 
132 
133 /* wps_common.c */
134 void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
135 	     const char *label, u8 *res, size_t res_len);
136 int wps_derive_keys(struct wps_data *wps);
137 int wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
138 		   size_t dev_passwd_len);
139 struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
140 					  size_t encr_len);
141 void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg,
142 		    u16 config_error, u16 error_indication, const u8 *mac_addr);
143 void wps_success_event(struct wps_context *wps, const u8 *mac_addr);
144 void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part,
145 			     const u8 *mac_addr);
146 void wps_pbc_overlap_event(struct wps_context *wps);
147 void wps_pbc_timeout_event(struct wps_context *wps);
148 void wps_pbc_active_event(struct wps_context *wps);
149 void wps_pbc_disable_event(struct wps_context *wps);
150 
151 struct wpabuf * wps_build_wsc_ack(struct wps_data *wps);
152 struct wpabuf * wps_build_wsc_nack(struct wps_data *wps);
153 
154 /* wps_attr_build.c */
155 int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg);
156 int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type);
157 int wps_build_resp_type(struct wpabuf *msg, enum wps_response_type type);
158 int wps_build_config_methods(struct wpabuf *msg, u16 methods);
159 int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid);
160 int wps_build_dev_password_id(struct wpabuf *msg, u16 id);
161 int wps_build_config_error(struct wpabuf *msg, u16 err);
162 int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg);
163 int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg);
164 int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
165 			    struct wpabuf *plain);
166 int wps_build_version(struct wpabuf *msg);
167 int wps_build_wfa_ext(struct wpabuf *msg, int req_to_enroll,
168 		      const u8 *auth_macs, size_t auth_macs_count,
169 		      u8 multi_ap_subelem);
170 int wps_build_msg_type(struct wpabuf *msg, enum wps_msg_type msg_type);
171 int wps_build_enrollee_nonce(struct wps_data *wps, struct wpabuf *msg);
172 int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg);
173 int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg);
174 int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg);
175 int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg);
176 int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg);
177 int wps_build_oob_dev_pw(struct wpabuf *msg, u16 dev_pw_id,
178 			 const struct wpabuf *pubkey, const u8 *dev_pw,
179 			 size_t dev_pw_len);
180 struct wpabuf * wps_ie_encapsulate(struct wpabuf *data);
181 int wps_build_mac_addr(struct wpabuf *msg, const u8 *addr);
182 int wps_build_rf_bands_attr(struct wpabuf *msg, u8 rf_bands);
183 int wps_build_ap_channel(struct wpabuf *msg, u16 ap_channel);
184 
185 /* wps_attr_process.c */
186 int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
187 			      const struct wpabuf *msg);
188 int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
189 			      const u8 *key_wrap_auth);
190 int wps_process_cred(struct wps_parse_attr *attr,
191 		     struct wps_credential *cred);
192 int wps_process_ap_settings(struct wps_parse_attr *attr,
193 			    struct wps_credential *cred);
194 
195 /* wps_enrollee.c */
196 struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
197 				     enum wsc_op_code *op_code);
198 enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
199 					      enum wsc_op_code op_code,
200 					      const struct wpabuf *msg);
201 
202 /* wps_registrar.c */
203 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
204 				      enum wsc_op_code *op_code);
205 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
206 					       enum wsc_op_code op_code,
207 					       const struct wpabuf *msg);
208 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg);
209 int wps_device_store(struct wps_registrar *reg,
210 		     struct wps_device_data *dev, const u8 *uuid);
211 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
212 					      u16 dev_pw_id);
213 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count);
214 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
215 			      const u8 *addr, const u8 *uuid_e);
216 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
217 				       struct wps_nfc_pw_token *token);
218 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
219 		   const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len);
220 
221 #endif /* WPS_I_H */
222