src/wps/wps_i.h

   1 /*
   2  * Wi-Fi Protected Setup - internal definitions
   3  * Copyright (c) 2008-2009, 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 WPS_I_H
  16 #define WPS_I_H
  17
  18 #include "wps.h"
  19
  20 /**
  21  * struct wps_data - WPS registration protocol data
  22  *
  23  * This data is stored at the EAP-WSC server/peer method and it is kept for a
  24  * single registration protocol run.
  25  */
  26 struct wps_data {
  27         /**
  28          * wps - Pointer to long term WPS context
  29          */
  30         struct wps_context *wps;
  31
  32         /**
  33          * registrar - Whether this end is a Registrar
  34          */
  35         int registrar;
  36
  37         /**
  38          * er - Whether the local end is an external registrar
  39          */
  40         int er;
  41
  42         enum {
  43                 /* Enrollee states */
  44                 SEND_M1, RECV_M2, SEND_M3, RECV_M4, SEND_M5, RECV_M6, SEND_M7,
  45                 RECV_M8, RECEIVED_M2D, WPS_MSG_DONE, RECV_ACK, WPS_FINISHED,
  46                 SEND_WSC_NACK,
  47
  48                 /* Registrar states */
  49                 RECV_M1, SEND_M2, RECV_M3, SEND_M4, RECV_M5, SEND_M6,
  50                 RECV_M7, SEND_M8, RECV_DONE, SEND_M2D, RECV_M2D_ACK
  51         } state;
  52
  53         u8 uuid_e[WPS_UUID_LEN];
  54         u8 uuid_r[WPS_UUID_LEN];
  55         u8 mac_addr_e[ETH_ALEN];
  56         u8 nonce_e[WPS_NONCE_LEN];
  57         u8 nonce_r[WPS_NONCE_LEN];
  58         u8 psk1[WPS_PSK_LEN];
  59         u8 psk2[WPS_PSK_LEN];
  60         u8 snonce[2 * WPS_SECRET_NONCE_LEN];
  61         u8 peer_hash1[WPS_HASH_LEN];
  62         u8 peer_hash2[WPS_HASH_LEN];
  63
  64         struct wpabuf *dh_privkey;
  65         struct wpabuf *dh_pubkey_e;
  66         struct wpabuf *dh_pubkey_r;
  67         u8 authkey[WPS_AUTHKEY_LEN];
  68         u8 keywrapkey[WPS_KEYWRAPKEY_LEN];
  69         u8 emsk[WPS_EMSK_LEN];
  70
  71         struct wpabuf *last_msg;
  72
  73         u8 *dev_password;
  74         size_t dev_password_len;
  75         u16 dev_pw_id;
  76         int pbc;
  77
  78         /**
  79          * request_type - Request Type attribute from (Re)AssocReq
  80          */
  81         u8 request_type;
  82
  83         /**
  84          * encr_type - Available encryption types
  85          */
  86         u16 encr_type;
  87
  88         /**
  89          * auth_type - Available authentication types
  90          */
  91         u16 auth_type;
  92
  93         u8 *new_psk;
  94         size_t new_psk_len;
  95
  96         int wps_pin_revealed;
  97         struct wps_credential cred;
  98
  99         struct wps_device_data peer_dev;
 100
 101         /**
 102          * config_error - Configuration Error value to be used in NACK
 103          */
 104         u16 config_error;
 105
 106         int ext_reg;
 107
 108         struct wps_credential *new_ap_settings;
 109
 110         void *dh_ctx;
 111
 112         void (*ap_settings_cb)(void *ctx, const struct wps_credential *cred);
 113         void *ap_settings_cb_ctx;
 114
 115         struct wps_credential *use_cred;
 116
 117         int use_psk_key;
 118 };
 119
 120
 121 struct wps_parse_attr {
 122         /* fixed length fields */
 123         const u8 *version; /* 1 octet */
 124         const u8 *msg_type; /* 1 octet */
 125         const u8 *enrollee_nonce; /* WPS_NONCE_LEN (16) octets */
 126         const u8 *registrar_nonce; /* WPS_NONCE_LEN (16) octets */
 127         const u8 *uuid_r; /* WPS_UUID_LEN (16) octets */
 128         const u8 *uuid_e; /* WPS_UUID_LEN (16) octets */
 129         const u8 *auth_type_flags; /* 2 octets */
 130         const u8 *encr_type_flags; /* 2 octets */
 131         const u8 *conn_type_flags; /* 1 octet */
 132         const u8 *config_methods; /* 2 octets */
 133         const u8 *sel_reg_config_methods; /* 2 octets */
 134         const u8 *primary_dev_type; /* 8 octets */
 135         const u8 *rf_bands; /* 1 octet */
 136         const u8 *assoc_state; /* 2 octets */
 137         const u8 *config_error; /* 2 octets */
 138         const u8 *dev_password_id; /* 2 octets */
 139         const u8 *oob_dev_password; /* WPS_OOB_DEVICE_PASSWORD_ATTR_LEN (54)
 140                                      * octets */
 141         const u8 *os_version; /* 4 octets */
 142         const u8 *wps_state; /* 1 octet */
 143         const u8 *authenticator; /* WPS_AUTHENTICATOR_LEN (8) octets */
 144         const u8 *r_hash1; /* WPS_HASH_LEN (32) octets */
 145         const u8 *r_hash2; /* WPS_HASH_LEN (32) octets */
 146         const u8 *e_hash1; /* WPS_HASH_LEN (32) octets */
 147         const u8 *e_hash2; /* WPS_HASH_LEN (32) octets */
 148         const u8 *r_snonce1; /* WPS_SECRET_NONCE_LEN (16) octets */
 149         const u8 *r_snonce2; /* WPS_SECRET_NONCE_LEN (16) octets */
 150         const u8 *e_snonce1; /* WPS_SECRET_NONCE_LEN (16) octets */
 151         const u8 *e_snonce2; /* WPS_SECRET_NONCE_LEN (16) octets */
 152         const u8 *key_wrap_auth; /* WPS_KWA_LEN (8) octets */
 153         const u8 *auth_type; /* 2 octets */
 154         const u8 *encr_type; /* 2 octets */
 155         const u8 *network_idx; /* 1 octet */
 156         const u8 *network_key_idx; /* 1 octet */
 157         const u8 *mac_addr; /* ETH_ALEN (6) octets */
 158         const u8 *key_prov_auto; /* 1 octet (Bool) */
 159         const u8 *dot1x_enabled; /* 1 octet (Bool) */
 160         const u8 *selected_registrar; /* 1 octet (Bool) */
 161         const u8 *request_type; /* 1 octet */
 162         const u8 *response_type; /* 1 octet */
 163         const u8 *ap_setup_locked; /* 1 octet */
 164
 165         /* variable length fields */
 166         const u8 *manufacturer;
 167         size_t manufacturer_len;
 168         const u8 *model_name;
 169         size_t model_name_len;
 170         const u8 *model_number;
 171         size_t model_number_len;
 172         const u8 *serial_number;
 173         size_t serial_number_len;
 174         const u8 *dev_name;
 175         size_t dev_name_len;
 176         const u8 *public_key;
 177         size_t public_key_len;
 178         const u8 *encr_settings;
 179         size_t encr_settings_len;
 180         const u8 *ssid; /* <= 32 octets */
 181         size_t ssid_len;
 182         const u8 *network_key; /* <= 64 octets */
 183         size_t network_key_len;
 184         const u8 *eap_type; /* <= 8 octets */
 185         size_t eap_type_len;
 186         const u8 *eap_identity; /* <= 64 octets */
 187         size_t eap_identity_len;
 188
 189         /* attributes that can occur multiple times */
 190 #define MAX_CRED_COUNT 10
 191         const u8 *cred[MAX_CRED_COUNT];
 192         size_t cred_len[MAX_CRED_COUNT];
 193         size_t num_cred;
 194 };
 195
 196 /* wps_common.c */
 197 void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
 198              const char *label, u8 *res, size_t res_len);
 199 int wps_derive_keys(struct wps_data *wps);
 200 void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
 201                     size_t dev_passwd_len);
 202 struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
 203                                           size_t encr_len);
 204 void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg);
 205 void wps_success_event(struct wps_context *wps);
 206 void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part);
 207 void wps_pbc_overlap_event(struct wps_context *wps);
 208 void wps_pbc_timeout_event(struct wps_context *wps);
 209
 210 extern struct oob_device_data oob_ufd_device_data;
 211 extern struct oob_device_data oob_nfc_device_data;
 212 extern struct oob_nfc_device_data oob_nfc_pn531_device_data;
 213
 214 /* wps_attr_parse.c */
 215 int wps_parse_msg(const struct wpabuf *msg, struct wps_parse_attr *attr);
 216
 217 /* wps_attr_build.c */
 218 int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg);
 219 int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type);
 220 int wps_build_config_methods(struct wpabuf *msg, u16 methods);
 221 int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid);
 222 int wps_build_dev_password_id(struct wpabuf *msg, u16 id);
 223 int wps_build_config_error(struct wpabuf *msg, u16 err);
 224 int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg);
 225 int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg);
 226 int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
 227                             struct wpabuf *plain);
 228 int wps_build_version(struct wpabuf *msg);
 229 int wps_build_msg_type(struct wpabuf *msg, enum wps_msg_type msg_type);
 230 int wps_build_enrollee_nonce(struct wps_data *wps, struct wpabuf *msg);
 231 int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg);
 232 int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg);
 233 int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg);
 234 int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg);
 235 int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg);
 236 int wps_build_oob_dev_password(struct wpabuf *msg, struct wps_context *wps);
 237
 238 /* wps_attr_process.c */
 239 int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
 240                               const struct wpabuf *msg);
 241 int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
 242                               const u8 *key_wrap_auth);
 243 int wps_process_cred(struct wps_parse_attr *attr,
 244                      struct wps_credential *cred);
 245 int wps_process_ap_settings(struct wps_parse_attr *attr,
 246                             struct wps_credential *cred);
 247
 248 /* wps_enrollee.c */
 249 struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
 250                                      enum wsc_op_code *op_code);
 251 enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
 252                                               enum wsc_op_code op_code,
 253                                               const struct wpabuf *msg);
 254
 255 /* wps_registrar.c */
 256 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
 257                                       enum wsc_op_code *op_code);
 258 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
 259                                                enum wsc_op_code op_code,
 260                                                const struct wpabuf *msg);
 261 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg);
 262 int wps_device_store(struct wps_registrar *reg,
 263                      struct wps_device_data *dev, const u8 *uuid);
 264 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg);
 265
 266 /* ndef.c */
 267 struct wpabuf * ndef_parse_wifi(struct wpabuf *buf);
 268 struct wpabuf * ndef_build_wifi(struct wpabuf *buf);
 269
 270 static inline int wps_version_supported(const u8 *version)
 271 {
 272         /* Require major version match, but allow minor version differences */
 273         return version && (*version & 0xf0) == (WPS_VERSION & 0xf0);
 274 }
 275
 276 #endif /* WPS_I_H */