contrib/hostapd/src/wps/wps_i.h

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