src/wps/wps.h

   1 /*
   2  * Wi-Fi Protected Setup
   3  * Copyright (c) 2007-2008, 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_H
  16 #define WPS_H
  17
  18 #include "wps_defs.h"
  19
  20 /**
  21  * enum wsc_op_code - EAP-WSC OP-Code values
  22  */
  23 enum wsc_op_code {
  24         WSC_UPnP = 0 /* No OP Code in UPnP transport */,
  25         WSC_Start = 0x01,
  26         WSC_ACK = 0x02,
  27         WSC_NACK = 0x03,
  28         WSC_MSG = 0x04,
  29         WSC_Done = 0x05,
  30         WSC_FRAG_ACK = 0x06
  31 };
  32
  33 struct wps_registrar;
  34 struct upnp_wps_device_sm;
  35
  36 /**
  37  * struct wps_credential - WPS Credential
  38  * @ssid: SSID
  39  * @ssid_len: Length of SSID
  40  * @auth_type: Authentication Type (WPS_AUTH_OPEN, .. flags)
  41  * @encr_type: Encryption Type (WPS_ENCR_NONE, .. flags)
  42  * @key_idx: Key index
  43  * @key: Key
  44  * @key_len: Key length in octets
  45  * @mac_addr: MAC address of the peer
  46  * @cred_attr: Unparsed Credential attribute data (used only in cred_cb());
  47  *      this may be %NULL, if not used
  48  * @cred_attr_len: Length of cred_attr in octets
  49  */
  50 struct wps_credential {
  51         u8 ssid[32];
  52         size_t ssid_len;
  53         u16 auth_type;
  54         u16 encr_type;
  55         u8 key_idx;
  56         u8 key[64];
  57         size_t key_len;
  58         u8 mac_addr[ETH_ALEN];
  59         const u8 *cred_attr;
  60         size_t cred_attr_len;
  61 };
  62
  63 /**
  64  * struct wps_device_data - WPS Device Data
  65  * @mac_addr: Device MAC address
  66  * @device_name: Device Name (0..32 octets encoded in UTF-8)
  67  * @manufacturer: Manufacturer (0..64 octets encoded in UTF-8)
  68  * @model_name: Model Name (0..32 octets encoded in UTF-8)
  69  * @model_number: Model Number (0..32 octets encoded in UTF-8)
  70  * @serial_number: Serial Number (0..32 octets encoded in UTF-8)
  71  * @categ: Primary Device Category
  72  * @oui: Primary Device OUI
  73  * @sub_categ: Primary Device Sub-Category
  74  * @os_version: OS Version
  75  * @rf_bands: RF bands (WPS_RF_24GHZ, WPS_RF_50GHZ flags)
  76  */
  77 struct wps_device_data {
  78         u8 mac_addr[ETH_ALEN];
  79         char *device_name;
  80         char *manufacturer;
  81         char *model_name;
  82         char *model_number;
  83         char *serial_number;
  84         u16 categ;
  85         u32 oui;
  86         u16 sub_categ;
  87         u32 os_version;
  88         u8 rf_bands;
  89 };
  90
  91 struct oob_conf_data {
  92         enum {
  93                 OOB_METHOD_UNKNOWN = 0,
  94                 OOB_METHOD_DEV_PWD_E,
  95                 OOB_METHOD_DEV_PWD_R,
  96                 OOB_METHOD_CRED,
  97         } oob_method;
  98         struct wpabuf *dev_password;
  99         struct wpabuf *pubkey_hash;
 100 };
 101
 102 /**
 103  * struct wps_config - WPS configuration for a single registration protocol run
 104  */
 105 struct wps_config {
 106         /**
 107          * wps - Pointer to long term WPS context
 108          */
 109         struct wps_context *wps;
 110
 111         /**
 112          * registrar - Whether this end is a Registrar
 113          */
 114         int registrar;
 115
 116         /**
 117          * pin - Enrollee Device Password (%NULL for Registrar or PBC)
 118          */
 119         const u8 *pin;
 120
 121         /**
 122          * pin_len - Length on pin in octets
 123          */
 124         size_t pin_len;
 125
 126         /**
 127          * pbc - Whether this is protocol run uses PBC
 128          */
 129         int pbc;
 130
 131         /**
 132          * assoc_wps_ie: (Re)AssocReq WPS IE (in AP; %NULL if not AP)
 133          */
 134         const struct wpabuf *assoc_wps_ie;
 135 };
 136
 137 struct wps_data * wps_init(const struct wps_config *cfg);
 138
 139 void wps_deinit(struct wps_data *data);
 140
 141 /**
 142  * enum wps_process_res - WPS message processing result
 143  */
 144 enum wps_process_res {
 145         /**
 146          * WPS_DONE - Processing done
 147          */
 148         WPS_DONE,
 149
 150         /**
 151          * WPS_CONTINUE - Processing continues
 152          */
 153         WPS_CONTINUE,
 154
 155         /**
 156          * WPS_FAILURE - Processing failed
 157          */
 158         WPS_FAILURE,
 159
 160         /**
 161          * WPS_PENDING - Processing continues, but waiting for an external
 162          *      event (e.g., UPnP message from an external Registrar)
 163          */
 164         WPS_PENDING
 165 };
 166 enum wps_process_res wps_process_msg(struct wps_data *wps,
 167                                      enum wsc_op_code op_code,
 168                                      const struct wpabuf *msg);
 169
 170 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code);
 171
 172 int wps_is_selected_pbc_registrar(const struct wpabuf *msg);
 173 int wps_is_selected_pin_registrar(const struct wpabuf *msg);
 174 const u8 * wps_get_uuid_e(const struct wpabuf *msg);
 175
 176 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type);
 177 struct wpabuf * wps_build_probe_req_ie(int pbc, struct wps_device_data *dev,
 178                                        const u8 *uuid,
 179                                        enum wps_request_type req_type);
 180
 181
 182 /**
 183  * struct wps_registrar_config - WPS Registrar configuration
 184  */
 185 struct wps_registrar_config {
 186         /**
 187          * new_psk_cb - Callback for new PSK
 188          * @ctx: Higher layer context data (cb_ctx)
 189          * @mac_addr: MAC address of the Enrollee
 190          * @psk: The new PSK
 191          * @psk_len: The length of psk in octets
 192          * Returns: 0 on success, -1 on failure
 193          *
 194          * This callback is called when a new per-device PSK is provisioned.
 195          */
 196         int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
 197                           size_t psk_len);
 198
 199         /**
 200          * set_ie_cb - Callback for WPS IE changes
 201          * @ctx: Higher layer context data (cb_ctx)
 202          * @beacon_ie: WPS IE for Beacon
 203          * @beacon_ie_len: WPS IE length for Beacon
 204          * @probe_resp_ie: WPS IE for Probe Response
 205          * @probe_resp_ie_len: WPS IE length for Probe Response
 206          * Returns: 0 on success, -1 on failure
 207          *
 208          * This callback is called whenever the WPS IE in Beacon or Probe
 209          * Response frames needs to be changed (AP only).
 210          */
 211         int (*set_ie_cb)(void *ctx, const u8 *beacon_ie, size_t beacon_ie_len,
 212                          const u8 *probe_resp_ie, size_t probe_resp_ie_len);
 213
 214         /**
 215          * pin_needed_cb - Callback for requesting a PIN
 216          * @ctx: Higher layer context data (cb_ctx)
 217          * @uuid_e: UUID-E of the unknown Enrollee
 218          * @dev: Device Data from the unknown Enrollee
 219          *
 220          * This callback is called whenever an unknown Enrollee requests to use
 221          * PIN method and a matching PIN (Device Password) is not found in
 222          * Registrar data.
 223          */
 224         void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
 225                               const struct wps_device_data *dev);
 226
 227         /**
 228          * reg_success_cb - Callback for reporting successful registration
 229          * @ctx: Higher layer context data (cb_ctx)
 230          * @mac_addr: MAC address of the Enrollee
 231          * @uuid_e: UUID-E of the Enrollee
 232          *
 233          * This callback is called whenever an Enrollee completes registration
 234          * successfully.
 235          */
 236         void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
 237                                const u8 *uuid_e);
 238
 239         /**
 240          * cb_ctx: Higher layer context data for Registrar callbacks
 241          */
 242         void *cb_ctx;
 243
 244         /**
 245          * skip_cred_build: Do not build credential
 246          *
 247          * This option can be used to disable internal code that builds
 248          * Credential attribute into M8 based on the current network
 249          * configuration and Enrollee capabilities. The extra_cred data will
 250          * then be used as the Credential(s).
 251          */
 252         int skip_cred_build;
 253
 254         /**
 255          * extra_cred: Additional Credential attribute(s)
 256          *
 257          * This optional data (set to %NULL to disable) can be used to add
 258          * Credential attribute(s) for other networks into M8. If
 259          * skip_cred_build is set, this will also override the automatically
 260          * generated Credential attribute.
 261          */
 262         const u8 *extra_cred;
 263
 264         /**
 265          * extra_cred_len: Length of extra_cred in octets
 266          */
 267         size_t extra_cred_len;
 268
 269         /**
 270          * disable_auto_conf - Disable auto-configuration on first registration
 271          *
 272          * By default, the AP that is started in not configured state will
 273          * generate a random PSK and move to configured state when the first
 274          * registration protocol run is completed successfully. This option can
 275          * be used to disable this functionality and leave it up to an external
 276          * program to take care of configuration. This requires the extra_cred
 277          * to be set with a suitable Credential and skip_cred_build being used.
 278          */
 279         int disable_auto_conf;
 280 };
 281
 282
 283 /**
 284  * enum wps_event - WPS event types
 285  */
 286 enum wps_event {
 287         /**
 288          * WPS_EV_M2D - M2D received (Registrar did not know us)
 289          */
 290         WPS_EV_M2D,
 291
 292         /**
 293          * WPS_EV_FAIL - Registration failed
 294          */
 295         WPS_EV_FAIL,
 296
 297         /**
 298          * WPS_EV_SUCCESS - Registration succeeded
 299          */
 300         WPS_EV_SUCCESS,
 301
 302         /**
 303          * WPS_EV_PWD_AUTH_FAIL - Password authentication failed
 304          */
 305         WPS_EV_PWD_AUTH_FAIL
 306 };
 307
 308 /**
 309  * union wps_event_data - WPS event data
 310  */
 311 union wps_event_data {
 312         /**
 313          * struct wps_event_m2d - M2D event data
 314          */
 315         struct wps_event_m2d {
 316                 u16 config_methods;
 317                 const u8 *manufacturer;
 318                 size_t manufacturer_len;
 319                 const u8 *model_name;
 320                 size_t model_name_len;
 321                 const u8 *model_number;
 322                 size_t model_number_len;
 323                 const u8 *serial_number;
 324                 size_t serial_number_len;
 325                 const u8 *dev_name;
 326                 size_t dev_name_len;
 327                 const u8 *primary_dev_type; /* 8 octets */
 328                 u16 config_error;
 329                 u16 dev_password_id;
 330         } m2d;
 331
 332         /**
 333          * struct wps_event_fail - Registration failure information
 334          * @msg: enum wps_msg_type
 335          */
 336         struct wps_event_fail {
 337                 int msg;
 338         } fail;
 339
 340         struct wps_event_pwd_auth_fail {
 341                 int enrollee;
 342                 int part;
 343         } pwd_auth_fail;
 344 };
 345
 346 /**
 347  * struct upnp_pending_message - Pending PutWLANResponse messages
 348  * @next: Pointer to next pending message or %NULL
 349  * @addr: NewWLANEventMAC
 350  * @msg: NewMessage
 351  * @type: Message Type
 352  */
 353 struct upnp_pending_message {
 354         struct upnp_pending_message *next;
 355         u8 addr[ETH_ALEN];
 356         struct wpabuf *msg;
 357         enum wps_msg_type type;
 358 };
 359
 360 /**
 361  * struct wps_context - Long term WPS context data
 362  *
 363  * This data is stored at the higher layer Authenticator or Supplicant data
 364  * structures and it is maintained over multiple registration protocol runs.
 365  */
 366 struct wps_context {
 367         /**
 368          * ap - Whether the local end is an access point
 369          */
 370         int ap;
 371
 372         /**
 373          * registrar - Pointer to WPS registrar data from wps_registrar_init()
 374          */
 375         struct wps_registrar *registrar;
 376
 377         /**
 378          * wps_state - Current WPS state
 379          */
 380         enum wps_state wps_state;
 381
 382         /**
 383          * ap_setup_locked - Whether AP setup is locked (only used at AP)
 384          */
 385         int ap_setup_locked;
 386
 387         /**
 388          * uuid - Own UUID
 389          */
 390         u8 uuid[16];
 391
 392         /**
 393          * ssid - SSID
 394          *
 395          * This SSID is used by the Registrar to fill in information for
 396          * Credentials. In addition, AP uses it when acting as an Enrollee to
 397          * notify Registrar of the current configuration.
 398          */
 399         u8 ssid[32];
 400
 401         /**
 402          * ssid_len - Length of ssid in octets
 403          */
 404         size_t ssid_len;
 405
 406         /**
 407          * dev - Own WPS device data
 408          */
 409         struct wps_device_data dev;
 410
 411         /**
 412          * oob_conf - OOB Config data
 413          */
 414         struct oob_conf_data oob_conf;
 415
 416         /**
 417          * oob_dev_pw_id - OOB Device password id
 418          */
 419         u16 oob_dev_pw_id;
 420
 421         /**
 422          * dh_privkey - Diffie-Hellman private key
 423          */
 424         struct wpabuf *dh_privkey;
 425
 426         /**
 427          * dh_pubkey_oob - Diffie-Hellman public key
 428          */
 429         struct wpabuf *dh_pubkey;
 430
 431         /**
 432          * config_methods - Enabled configuration methods
 433          *
 434          * Bit field of WPS_CONFIG_*
 435          */
 436         u16 config_methods;
 437
 438         /**
 439          * encr_types - Enabled encryption types (bit field of WPS_ENCR_*)
 440          */
 441         u16 encr_types;
 442
 443         /**
 444          * auth_types - Authentication types (bit field of WPS_AUTH_*)
 445          */
 446         u16 auth_types;
 447
 448         /**
 449          * network_key - The current Network Key (PSK) or %NULL to generate new
 450          *
 451          * If %NULL, Registrar will generate per-device PSK. In addition, AP
 452          * uses this when acting as an Enrollee to notify Registrar of the
 453          * current configuration.
 454          */
 455         u8 *network_key;
 456
 457         /**
 458          * network_key_len - Length of network_key in octets
 459          */
 460         size_t network_key_len;
 461
 462         /**
 463          * ap_settings - AP Settings override for M7 (only used at AP)
 464          *
 465          * If %NULL, AP Settings attributes will be generated based on the
 466          * current network configuration.
 467          */
 468         u8 *ap_settings;
 469
 470         /**
 471          * ap_settings_len - Length of ap_settings in octets
 472          */
 473         size_t ap_settings_len;
 474
 475         /**
 476          * friendly_name - Friendly Name (required for UPnP)
 477          */
 478         char *friendly_name;
 479
 480         /**
 481          * manufacturer_url - Manufacturer URL (optional for UPnP)
 482          */
 483         char *manufacturer_url;
 484
 485         /**
 486          * model_description - Model Description (recommended for UPnP)
 487          */
 488         char *model_description;
 489
 490         /**
 491          * model_url - Model URL (optional for UPnP)
 492          */
 493         char *model_url;
 494
 495         /**
 496          * upc - Universal Product Code (optional for UPnP)
 497          */
 498         char *upc;
 499
 500         /**
 501          * cred_cb - Callback to notify that new Credentials were received
 502          * @ctx: Higher layer context data (cb_ctx)
 503          * @cred: The received Credential
 504          * Return: 0 on success, -1 on failure
 505          */
 506         int (*cred_cb)(void *ctx, const struct wps_credential *cred);
 507
 508         /**
 509          * event_cb - Event callback (state information about progress)
 510          * @ctx: Higher layer context data (cb_ctx)
 511          * @event: Event type
 512          * @data: Event data
 513          */
 514         void (*event_cb)(void *ctx, enum wps_event event,
 515                          union wps_event_data *data);
 516
 517         /**
 518          * cb_ctx: Higher layer context data for callbacks
 519          */
 520         void *cb_ctx;
 521
 522         struct upnp_wps_device_sm *wps_upnp;
 523
 524         /* Pending messages from UPnP PutWLANResponse */
 525         struct upnp_pending_message *upnp_msgs;
 526 };
 527
 528 struct oob_device_data {
 529         char *device_path;
 530         void * (*init_func)(struct wps_context *, struct oob_device_data *,
 531                             int);
 532         struct wpabuf * (*read_func)(void *);
 533         int (*write_func)(void *, struct wpabuf *);
 534         void (*deinit_func)(void *);
 535 };
 536
 537 struct wps_registrar *
 538 wps_registrar_init(struct wps_context *wps,
 539                    const struct wps_registrar_config *cfg);
 540 void wps_registrar_deinit(struct wps_registrar *reg);
 541 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *uuid,
 542                           const u8 *pin, size_t pin_len);
 543 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid);
 544 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid);
 545 int wps_registrar_button_pushed(struct wps_registrar *reg);
 546 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
 547                                 const struct wpabuf *wps_data);
 548 int wps_registrar_update_ie(struct wps_registrar *reg);
 549 int wps_registrar_set_selected_registrar(struct wps_registrar *reg,
 550                                          const struct wpabuf *msg);
 551
 552 unsigned int wps_pin_checksum(unsigned int pin);
 553 unsigned int wps_pin_valid(unsigned int pin);
 554 unsigned int wps_generate_pin(void);
 555 void wps_free_pending_msgs(struct upnp_pending_message *msgs);
 556
 557 struct oob_device_data * wps_get_oob_device(char *device_type);
 558 int wps_get_oob_method(char *method);
 559 int wps_process_oob(struct wps_context *wps, struct oob_device_data *oob_dev,
 560                     int registrar);
 561
 562 #endif /* WPS_H */