contrib/wpa/src/wps/wps_registrar.c

   1 /*
   2  * Wi-Fi Protected Setup - Registrar
   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 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "sha256.h"
  19 #include "base64.h"
  20 #include "ieee802_11_defs.h"
  21 #include "eloop.h"
  22 #include "wps_i.h"
  23 #include "wps_dev_attr.h"
  24 #include "wps_upnp.h"
  25
  26
  27 struct wps_uuid_pin {
  28         struct wps_uuid_pin *next;
  29         u8 uuid[WPS_UUID_LEN];
  30         int wildcard_uuid;
  31         u8 *pin;
  32         size_t pin_len;
  33         int locked;
  34 };
  35
  36
  37 static void wps_free_pin(struct wps_uuid_pin *pin)
  38 {
  39         os_free(pin->pin);
  40         os_free(pin);
  41 }
  42
  43
  44 static void wps_free_pins(struct wps_uuid_pin *pins)
  45 {
  46         struct wps_uuid_pin *pin, *prev;
  47
  48         pin = pins;
  49         while (pin) {
  50                 prev = pin;
  51                 pin = pin->next;
  52                 wps_free_pin(prev);
  53         }
  54 }
  55
  56
  57 struct wps_pbc_session {
  58         struct wps_pbc_session *next;
  59         u8 addr[ETH_ALEN];
  60         u8 uuid_e[WPS_UUID_LEN];
  61         struct os_time timestamp;
  62 };
  63
  64
  65 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
  66 {
  67         struct wps_pbc_session *prev;
  68
  69         while (pbc) {
  70                 prev = pbc;
  71                 pbc = pbc->next;
  72                 os_free(prev);
  73         }
  74 }
  75
  76
  77 struct wps_registrar {
  78         struct wps_context *wps;
  79
  80         int pbc;
  81         int selected_registrar;
  82
  83         int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
  84                           size_t psk_len);
  85         int (*set_ie_cb)(void *ctx, const u8 *beacon_ie, size_t beacon_ie_len,
  86                          const u8 *probe_resp_ie, size_t probe_resp_ie_len);
  87         void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
  88                               const struct wps_device_data *dev);
  89         void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
  90                                const u8 *uuid_e);
  91         void *cb_ctx;
  92
  93         struct wps_uuid_pin *pins;
  94         struct wps_pbc_session *pbc_sessions;
  95
  96         int skip_cred_build;
  97         struct wpabuf *extra_cred;
  98         int disable_auto_conf;
  99         int sel_reg_dev_password_id_override;
 100         int sel_reg_config_methods_override;
 101 };
 102
 103
 104 static int wps_set_ie(struct wps_registrar *reg);
 105 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
 106 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
 107                                                void *timeout_ctx);
 108
 109
 110 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
 111                                           const u8 *addr, const u8 *uuid_e)
 112 {
 113         struct wps_pbc_session *pbc, *prev = NULL;
 114         struct os_time now;
 115
 116         os_get_time(&now);
 117
 118         pbc = reg->pbc_sessions;
 119         while (pbc) {
 120                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 121                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 122                         if (prev)
 123                                 prev->next = pbc->next;
 124                         else
 125                                 reg->pbc_sessions = pbc->next;
 126                         break;
 127                 }
 128                 prev = pbc;
 129                 pbc = pbc->next;
 130         }
 131
 132         if (!pbc) {
 133                 pbc = os_zalloc(sizeof(*pbc));
 134                 if (pbc == NULL)
 135                         return;
 136                 os_memcpy(pbc->addr, addr, ETH_ALEN);
 137                 if (uuid_e)
 138                         os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
 139         }
 140
 141         pbc->next = reg->pbc_sessions;
 142         reg->pbc_sessions = pbc;
 143         pbc->timestamp = now;
 144
 145         /* remove entries that have timed out */
 146         prev = pbc;
 147         pbc = pbc->next;
 148
 149         while (pbc) {
 150                 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
 151                         prev->next = NULL;
 152                         wps_free_pbc_sessions(pbc);
 153                         break;
 154                 }
 155                 prev = pbc;
 156                 pbc = pbc->next;
 157         }
 158 }
 159
 160
 161 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
 162                                              const u8 *addr, const u8 *uuid_e)
 163 {
 164         struct wps_pbc_session *pbc, *prev = NULL;
 165
 166         pbc = reg->pbc_sessions;
 167         while (pbc) {
 168                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 169                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 170                         if (prev)
 171                                 prev->next = pbc->next;
 172                         else
 173                                 reg->pbc_sessions = pbc->next;
 174                         os_free(pbc);
 175                         break;
 176                 }
 177                 prev = pbc;
 178                 pbc = pbc->next;
 179         }
 180 }
 181
 182
 183 static int wps_registrar_pbc_overlap(struct wps_registrar *reg,
 184                                      const u8 *addr, const u8 *uuid_e)
 185 {
 186         int count = 0;
 187         struct wps_pbc_session *pbc;
 188         struct os_time now;
 189
 190         os_get_time(&now);
 191
 192         for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
 193                 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME)
 194                         break;
 195                 if (addr == NULL || os_memcmp(addr, pbc->addr, ETH_ALEN) ||
 196                     uuid_e == NULL ||
 197                     os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN))
 198                         count++;
 199         }
 200
 201         if (addr || uuid_e)
 202                 count++;
 203
 204         return count > 1 ? 1 : 0;
 205 }
 206
 207
 208 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
 209 {
 210         wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
 211                    wps->wps_state);
 212         wpabuf_put_be16(msg, ATTR_WPS_STATE);
 213         wpabuf_put_be16(msg, 1);
 214         wpabuf_put_u8(msg, wps->wps_state);
 215         return 0;
 216 }
 217
 218
 219 #ifdef CONFIG_WPS_UPNP
 220 static void wps_registrar_free_pending_m2(struct wps_context *wps)
 221 {
 222         struct upnp_pending_message *p, *p2, *prev = NULL;
 223         p = wps->upnp_msgs;
 224         while (p) {
 225                 if (p->type == WPS_M2 || p->type == WPS_M2D) {
 226                         if (prev == NULL)
 227                                 wps->upnp_msgs = p->next;
 228                         else
 229                                 prev->next = p->next;
 230                         wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
 231                         p2 = p;
 232                         p = p->next;
 233                         wpabuf_free(p2->msg);
 234                         os_free(p2);
 235                         continue;
 236                 }
 237                 prev = p;
 238                 p = p->next;
 239         }
 240 }
 241 #endif /* CONFIG_WPS_UPNP */
 242
 243
 244 static int wps_build_ap_setup_locked(struct wps_context *wps,
 245                                      struct wpabuf *msg)
 246 {
 247         if (wps->ap_setup_locked) {
 248                 wpa_printf(MSG_DEBUG, "WPS:  * AP Setup Locked");
 249                 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
 250                 wpabuf_put_be16(msg, 1);
 251                 wpabuf_put_u8(msg, 1);
 252         }
 253         return 0;
 254 }
 255
 256
 257 static int wps_build_selected_registrar(struct wps_registrar *reg,
 258                                         struct wpabuf *msg)
 259 {
 260         if (!reg->selected_registrar)
 261                 return 0;
 262         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar");
 263         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
 264         wpabuf_put_be16(msg, 1);
 265         wpabuf_put_u8(msg, 1);
 266         return 0;
 267 }
 268
 269
 270 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
 271                                              struct wpabuf *msg)
 272 {
 273         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 274         if (!reg->selected_registrar)
 275                 return 0;
 276         if (reg->sel_reg_dev_password_id_override >= 0)
 277                 id = reg->sel_reg_dev_password_id_override;
 278         wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
 279         wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
 280         wpabuf_put_be16(msg, 2);
 281         wpabuf_put_be16(msg, id);
 282         return 0;
 283 }
 284
 285
 286 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
 287                                             struct wpabuf *msg)
 288 {
 289         u16 methods;
 290         if (!reg->selected_registrar)
 291                 return 0;
 292         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 293         if (reg->pbc)
 294                 methods |= WPS_CONFIG_PUSHBUTTON;
 295         if (reg->sel_reg_config_methods_override >= 0)
 296                 methods = reg->sel_reg_config_methods_override;
 297         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar Config Methods (%x)",
 298                    methods);
 299         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
 300         wpabuf_put_be16(msg, 2);
 301         wpabuf_put_be16(msg, methods);
 302         return 0;
 303 }
 304
 305
 306 static int wps_build_probe_config_methods(struct wps_registrar *reg,
 307                                           struct wpabuf *msg)
 308 {
 309         u16 methods;
 310         methods = 0;
 311         wpa_printf(MSG_DEBUG, "WPS:  * Config Methods (%x)", methods);
 312         wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
 313         wpabuf_put_be16(msg, 2);
 314         wpabuf_put_be16(msg, methods);
 315         return 0;
 316 }
 317
 318
 319 static int wps_build_config_methods_r(struct wps_registrar *reg,
 320                                       struct wpabuf *msg)
 321 {
 322         u16 methods;
 323         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 324         if (reg->pbc)
 325                 methods |= WPS_CONFIG_PUSHBUTTON;
 326         return wps_build_config_methods(msg, methods);
 327 }
 328
 329
 330 static int wps_build_resp_type(struct wps_registrar *reg, struct wpabuf *msg)
 331 {
 332         u8 resp = reg->wps->ap ? WPS_RESP_AP : WPS_RESP_REGISTRAR;
 333         wpa_printf(MSG_DEBUG, "WPS:  * Response Type (%d)", resp);
 334         wpabuf_put_be16(msg, ATTR_RESPONSE_TYPE);
 335         wpabuf_put_be16(msg, 1);
 336         wpabuf_put_u8(msg, resp);
 337         return 0;
 338 }
 339
 340
 341 /**
 342  * wps_registrar_init - Initialize WPS Registrar data
 343  * @wps: Pointer to longterm WPS context
 344  * @cfg: Registrar configuration
 345  * Returns: Pointer to allocated Registrar data or %NULL on failure
 346  *
 347  * This function is used to initialize WPS Registrar functionality. It can be
 348  * used for a single Registrar run (e.g., when run in a supplicant) or multiple
 349  * runs (e.g., when run as an internal Registrar in an AP). Caller is
 350  * responsible for freeing the returned data with wps_registrar_deinit() when
 351  * Registrar functionality is not needed anymore.
 352  */
 353 struct wps_registrar *
 354 wps_registrar_init(struct wps_context *wps,
 355                    const struct wps_registrar_config *cfg)
 356 {
 357         struct wps_registrar *reg = os_zalloc(sizeof(*reg));
 358         if (reg == NULL)
 359                 return NULL;
 360
 361         reg->wps = wps;
 362         reg->new_psk_cb = cfg->new_psk_cb;
 363         reg->set_ie_cb = cfg->set_ie_cb;
 364         reg->pin_needed_cb = cfg->pin_needed_cb;
 365         reg->reg_success_cb = cfg->reg_success_cb;
 366         reg->cb_ctx = cfg->cb_ctx;
 367         reg->skip_cred_build = cfg->skip_cred_build;
 368         if (cfg->extra_cred) {
 369                 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
 370                                                     cfg->extra_cred_len);
 371                 if (reg->extra_cred == NULL) {
 372                         os_free(reg);
 373                         return NULL;
 374                 }
 375         }
 376         reg->disable_auto_conf = cfg->disable_auto_conf;
 377         reg->sel_reg_dev_password_id_override = -1;
 378         reg->sel_reg_config_methods_override = -1;
 379
 380         if (wps_set_ie(reg)) {
 381                 wps_registrar_deinit(reg);
 382                 return NULL;
 383         }
 384
 385         return reg;
 386 }
 387
 388
 389 /**
 390  * wps_registrar_deinit - Deinitialize WPS Registrar data
 391  * @reg: Registrar data from wps_registrar_init()
 392  */
 393 void wps_registrar_deinit(struct wps_registrar *reg)
 394 {
 395         if (reg == NULL)
 396                 return;
 397         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 398         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 399         wps_free_pins(reg->pins);
 400         wps_free_pbc_sessions(reg->pbc_sessions);
 401         wpabuf_free(reg->extra_cred);
 402         os_free(reg);
 403 }
 404
 405
 406 /**
 407  * wps_registrar_add_pin - Configure a new PIN for Registrar
 408  * @reg: Registrar data from wps_registrar_init()
 409  * @uuid: UUID-E or %NULL for wildcard (any UUID)
 410  * @pin: PIN (Device Password)
 411  * @pin_len: Length of pin in octets
 412  * Returns: 0 on success, -1 on failure
 413  */
 414 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *uuid,
 415                           const u8 *pin, size_t pin_len)
 416 {
 417         struct wps_uuid_pin *p;
 418
 419         p = os_zalloc(sizeof(*p));
 420         if (p == NULL)
 421                 return -1;
 422         if (uuid == NULL)
 423                 p->wildcard_uuid = 1;
 424         else
 425                 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
 426         p->pin = os_malloc(pin_len);
 427         if (p->pin == NULL) {
 428                 os_free(p);
 429                 return -1;
 430         }
 431         os_memcpy(p->pin, pin, pin_len);
 432         p->pin_len = pin_len;
 433
 434         p->next = reg->pins;
 435         reg->pins = p;
 436
 437         wpa_printf(MSG_DEBUG, "WPS: A new PIN configured");
 438         wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
 439         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
 440         reg->selected_registrar = 1;
 441         reg->pbc = 0;
 442         wps_set_ie(reg);
 443
 444         return 0;
 445 }
 446
 447
 448 /**
 449  * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
 450  * @reg: Registrar data from wps_registrar_init()
 451  * @uuid: UUID-E
 452  * Returns: 0 on success, -1 on failure (e.g., PIN not found)
 453  */
 454 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
 455 {
 456         struct wps_uuid_pin *pin, *prev;
 457
 458         prev = NULL;
 459         pin = reg->pins;
 460         while (pin) {
 461                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 462                         if (prev == NULL)
 463                                 reg->pins = pin->next;
 464                         else
 465                                 prev->next = pin->next;
 466                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 467                                     pin->uuid, WPS_UUID_LEN);
 468                         wps_free_pin(pin);
 469                         return 0;
 470                 }
 471                 prev = pin;
 472                 pin = pin->next;
 473         }
 474
 475         return -1;
 476 }
 477
 478
 479 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
 480                                         const u8 *uuid, size_t *pin_len)
 481 {
 482         struct wps_uuid_pin *pin;
 483
 484         pin = reg->pins;
 485         while (pin) {
 486                 if (!pin->wildcard_uuid &&
 487                     os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0)
 488                         break;
 489                 pin = pin->next;
 490         }
 491
 492         if (!pin) {
 493                 /* Check for wildcard UUIDs since none of the UUID-specific
 494                  * PINs matched */
 495                 pin = reg->pins;
 496                 while (pin) {
 497                         if (pin->wildcard_uuid == 1) {
 498                                 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
 499                                            "PIN. Assigned it for this UUID-E");
 500                                 pin->wildcard_uuid = 2;
 501                                 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
 502                                 break;
 503                         }
 504                         pin = pin->next;
 505                 }
 506         }
 507
 508         if (!pin)
 509                 return NULL;
 510
 511         /*
 512          * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
 513          * that could otherwise avoid PIN invalidations.
 514          */
 515         if (pin->locked) {
 516                 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
 517                            "allow concurrent re-use");
 518                 return NULL;
 519         }
 520         *pin_len = pin->pin_len;
 521         pin->locked = 1;
 522         return pin->pin;
 523 }
 524
 525
 526 /**
 527  * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
 528  * @reg: Registrar data from wps_registrar_init()
 529  * @uuid: UUID-E
 530  * Returns: 0 on success, -1 on failure
 531  *
 532  * PINs are locked to enforce only one concurrent use. This function unlocks a
 533  * PIN to allow it to be used again. If the specified PIN was configured using
 534  * a wildcard UUID, it will be removed instead of allowing multiple uses.
 535  */
 536 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
 537 {
 538         struct wps_uuid_pin *pin;
 539
 540         pin = reg->pins;
 541         while (pin) {
 542                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 543                         if (pin->wildcard_uuid == 2) {
 544                                 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
 545                                            "wildcard PIN");
 546                                 return wps_registrar_invalidate_pin(reg, uuid);
 547                         }
 548                         pin->locked = 0;
 549                         return 0;
 550                 }
 551                 pin = pin->next;
 552         }
 553
 554         return -1;
 555 }
 556
 557
 558 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
 559 {
 560         reg->selected_registrar = 0;
 561         reg->pbc = 0;
 562         wps_set_ie(reg);
 563 }
 564
 565
 566 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
 567 {
 568         struct wps_registrar *reg = eloop_ctx;
 569
 570         wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
 571         wps_registrar_stop_pbc(reg);
 572 }
 573
 574
 575 /**
 576  * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
 577  * @reg: Registrar data from wps_registrar_init()
 578  * Returns: 0 on success, -1 on failure
 579  *
 580  * This function is called on an AP when a push button is pushed to activate
 581  * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
 582  * or when a PBC registration is completed.
 583  */
 584 int wps_registrar_button_pushed(struct wps_registrar *reg)
 585 {
 586         if (wps_registrar_pbc_overlap(reg, NULL, NULL)) {
 587                 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
 588                            "mode");
 589                 return -1;
 590         }
 591         wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
 592         reg->selected_registrar = 1;
 593         reg->pbc = 1;
 594         wps_set_ie(reg);
 595
 596         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 597         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
 598                                reg, NULL);
 599         return 0;
 600 }
 601
 602
 603 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
 604 {
 605         wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
 606         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 607         wps_registrar_stop_pbc(reg);
 608 }
 609
 610
 611 /**
 612  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
 613  * @reg: Registrar data from wps_registrar_init()
 614  * @addr: MAC address of the Probe Request sender
 615  * @wps_data: WPS IE contents
 616  *
 617  * This function is called on an AP when a Probe Request with WPS IE is
 618  * received. This is used to track PBC mode use and to detect possible overlap
 619  * situation with other WPS APs.
 620  */
 621 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
 622                                 const struct wpabuf *wps_data)
 623 {
 624         struct wps_parse_attr attr;
 625         u16 methods;
 626
 627         wpa_hexdump_buf(MSG_MSGDUMP,
 628                         "WPS: Probe Request with WPS data received",
 629                         wps_data);
 630
 631         if (wps_parse_msg(wps_data, &attr) < 0)
 632                 return;
 633         if (!wps_version_supported(attr.version)) {
 634                 wpa_printf(MSG_DEBUG, "WPS: Unsupported ProbeReq WPS IE "
 635                            "version 0x%x", attr.version ? *attr.version : 0);
 636                 return;
 637         }
 638
 639         if (attr.config_methods == NULL) {
 640                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
 641                            "Probe Request");
 642                 return;
 643         }
 644
 645         methods = WPA_GET_BE16(attr.config_methods);
 646         if (!(methods & WPS_CONFIG_PUSHBUTTON))
 647                 return; /* Not PBC */
 648
 649         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
 650                    MACSTR, MAC2STR(addr));
 651
 652         wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
 653 }
 654
 655
 656 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
 657                           const u8 *psk, size_t psk_len)
 658 {
 659         if (reg->new_psk_cb == NULL)
 660                 return 0;
 661
 662         return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
 663 }
 664
 665
 666 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
 667                               const struct wps_device_data *dev)
 668 {
 669         if (reg->pin_needed_cb == NULL)
 670                 return;
 671
 672         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
 673 }
 674
 675
 676 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
 677                                const u8 *uuid_e)
 678 {
 679         if (reg->reg_success_cb == NULL)
 680                 return;
 681
 682         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
 683 }
 684
 685
 686 static int wps_cb_set_ie(struct wps_registrar *reg,
 687                          const struct wpabuf *beacon_ie,
 688                          const struct wpabuf *probe_resp_ie)
 689 {
 690         if (reg->set_ie_cb == NULL)
 691                 return 0;
 692
 693         return reg->set_ie_cb(reg->cb_ctx, wpabuf_head(beacon_ie),
 694                               wpabuf_len(beacon_ie),
 695                               wpabuf_head(probe_resp_ie),
 696                               wpabuf_len(probe_resp_ie));
 697 }
 698
 699
 700 /* Encapsulate WPS IE data with one (or more, if needed) IE headers */
 701 static struct wpabuf * wps_ie_encapsulate(struct wpabuf *data)
 702 {
 703         struct wpabuf *ie;
 704         const u8 *pos, *end;
 705
 706         ie = wpabuf_alloc(wpabuf_len(data) + 100);
 707         if (ie == NULL) {
 708                 wpabuf_free(data);
 709                 return NULL;
 710         }
 711
 712         pos = wpabuf_head(data);
 713         end = pos + wpabuf_len(data);
 714
 715         while (end > pos) {
 716                 size_t frag_len = end - pos;
 717                 if (frag_len > 251)
 718                         frag_len = 251;
 719                 wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 720                 wpabuf_put_u8(ie, 4 + frag_len);
 721                 wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 722                 wpabuf_put_data(ie, pos, frag_len);
 723                 pos += frag_len;
 724         }
 725
 726         wpabuf_free(data);
 727
 728         return ie;
 729 }
 730
 731
 732 static int wps_set_ie(struct wps_registrar *reg)
 733 {
 734         struct wpabuf *beacon;
 735         struct wpabuf *probe;
 736         int ret;
 737
 738         wpa_printf(MSG_DEBUG, "WPS: Build Beacon and Probe Response IEs");
 739
 740         beacon = wpabuf_alloc(300);
 741         if (beacon == NULL)
 742                 return -1;
 743         probe = wpabuf_alloc(400);
 744         if (probe == NULL) {
 745                 wpabuf_free(beacon);
 746                 return -1;
 747         }
 748
 749         if (wps_build_version(beacon) ||
 750             wps_build_wps_state(reg->wps, beacon) ||
 751             wps_build_ap_setup_locked(reg->wps, beacon) ||
 752             wps_build_selected_registrar(reg, beacon) ||
 753             wps_build_sel_reg_dev_password_id(reg, beacon) ||
 754             wps_build_sel_reg_config_methods(reg, beacon) ||
 755             wps_build_version(probe) ||
 756             wps_build_wps_state(reg->wps, probe) ||
 757             wps_build_ap_setup_locked(reg->wps, probe) ||
 758             wps_build_selected_registrar(reg, probe) ||
 759             wps_build_sel_reg_dev_password_id(reg, probe) ||
 760             wps_build_sel_reg_config_methods(reg, probe) ||
 761             wps_build_resp_type(reg, probe) ||
 762             wps_build_uuid_e(probe, reg->wps->uuid) ||
 763             wps_build_device_attrs(&reg->wps->dev, probe) ||
 764             wps_build_probe_config_methods(reg, probe) ||
 765             wps_build_rf_bands(&reg->wps->dev, probe)) {
 766                 wpabuf_free(beacon);
 767                 wpabuf_free(probe);
 768                 return -1;
 769         }
 770
 771         beacon = wps_ie_encapsulate(beacon);
 772         probe = wps_ie_encapsulate(probe);
 773
 774         if (!beacon || !probe) {
 775                 wpabuf_free(beacon);
 776                 wpabuf_free(probe);
 777                 return -1;
 778         }
 779
 780         ret = wps_cb_set_ie(reg, beacon, probe);
 781         wpabuf_free(beacon);
 782         wpabuf_free(probe);
 783
 784         return ret;
 785 }
 786
 787
 788 static int wps_get_dev_password(struct wps_data *wps)
 789 {
 790         const u8 *pin;
 791         size_t pin_len = 0;
 792
 793         os_free(wps->dev_password);
 794         wps->dev_password = NULL;
 795
 796         if (wps->pbc) {
 797                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
 798                 pin = (const u8 *) "00000000";
 799                 pin_len = 8;
 800         } else {
 801                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
 802                                             &pin_len);
 803         }
 804         if (pin == NULL) {
 805                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
 806                            "the Enrollee");
 807                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
 808                                   &wps->peer_dev);
 809                 return -1;
 810         }
 811
 812         wps->dev_password = os_malloc(pin_len);
 813         if (wps->dev_password == NULL)
 814                 return -1;
 815         os_memcpy(wps->dev_password, pin, pin_len);
 816         wps->dev_password_len = pin_len;
 817
 818         return 0;
 819 }
 820
 821
 822 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
 823 {
 824         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
 825         wpabuf_put_be16(msg, ATTR_UUID_R);
 826         wpabuf_put_be16(msg, WPS_UUID_LEN);
 827         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
 828         return 0;
 829 }
 830
 831
 832 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
 833 {
 834         u8 *hash;
 835         const u8 *addr[4];
 836         size_t len[4];
 837
 838         if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
 839                 return -1;
 840         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
 841         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
 842                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
 843
 844         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
 845                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
 846                            "R-Hash derivation");
 847                 return -1;
 848         }
 849
 850         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
 851         wpabuf_put_be16(msg, ATTR_R_HASH1);
 852         wpabuf_put_be16(msg, SHA256_MAC_LEN);
 853         hash = wpabuf_put(msg, SHA256_MAC_LEN);
 854         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
 855         addr[0] = wps->snonce;
 856         len[0] = WPS_SECRET_NONCE_LEN;
 857         addr[1] = wps->psk1;
 858         len[1] = WPS_PSK_LEN;
 859         addr[2] = wpabuf_head(wps->dh_pubkey_e);
 860         len[2] = wpabuf_len(wps->dh_pubkey_e);
 861         addr[3] = wpabuf_head(wps->dh_pubkey_r);
 862         len[3] = wpabuf_len(wps->dh_pubkey_r);
 863         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
 864         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
 865
 866         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
 867         wpabuf_put_be16(msg, ATTR_R_HASH2);
 868         wpabuf_put_be16(msg, SHA256_MAC_LEN);
 869         hash = wpabuf_put(msg, SHA256_MAC_LEN);
 870         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
 871         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
 872         addr[1] = wps->psk2;
 873         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
 874         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
 875
 876         return 0;
 877 }
 878
 879
 880 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
 881 {
 882         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
 883         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
 884         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
 885         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
 886         return 0;
 887 }
 888
 889
 890 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
 891 {
 892         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
 893         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
 894         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
 895         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
 896                         WPS_SECRET_NONCE_LEN);
 897         return 0;
 898 }
 899
 900
 901 static int wps_build_cred_network_idx(struct wpabuf *msg,
 902                                       struct wps_credential *cred)
 903 {
 904         wpa_printf(MSG_DEBUG, "WPS:  * Network Index");
 905         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
 906         wpabuf_put_be16(msg, 1);
 907         wpabuf_put_u8(msg, 1);
 908         return 0;
 909 }
 910
 911
 912 static int wps_build_cred_ssid(struct wpabuf *msg,
 913                                struct wps_credential *cred)
 914 {
 915         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
 916         wpabuf_put_be16(msg, ATTR_SSID);
 917         wpabuf_put_be16(msg, cred->ssid_len);
 918         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
 919         return 0;
 920 }
 921
 922
 923 static int wps_build_cred_auth_type(struct wpabuf *msg,
 924                                     struct wps_credential *cred)
 925 {
 926         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
 927                    cred->auth_type);
 928         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
 929         wpabuf_put_be16(msg, 2);
 930         wpabuf_put_be16(msg, cred->auth_type);
 931         return 0;
 932 }
 933
 934
 935 static int wps_build_cred_encr_type(struct wpabuf *msg,
 936                                     struct wps_credential *cred)
 937 {
 938         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
 939                    cred->encr_type);
 940         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
 941         wpabuf_put_be16(msg, 2);
 942         wpabuf_put_be16(msg, cred->encr_type);
 943         return 0;
 944 }
 945
 946
 947 static int wps_build_cred_network_key(struct wpabuf *msg,
 948                                       struct wps_credential *cred)
 949 {
 950         wpa_printf(MSG_DEBUG, "WPS:  * Network Key");
 951         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
 952         wpabuf_put_be16(msg, cred->key_len);
 953         wpabuf_put_data(msg, cred->key, cred->key_len);
 954         return 0;
 955 }
 956
 957
 958 static int wps_build_cred_mac_addr(struct wpabuf *msg,
 959                                    struct wps_credential *cred)
 960 {
 961         wpa_printf(MSG_DEBUG, "WPS:  * MAC Address (" MACSTR ")",
 962                    MAC2STR(cred->mac_addr));
 963         wpabuf_put_be16(msg, ATTR_MAC_ADDR);
 964         wpabuf_put_be16(msg, ETH_ALEN);
 965         wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
 966         return 0;
 967 }
 968
 969
 970 static int wps_build_credential(struct wpabuf *msg,
 971                                 struct wps_credential *cred)
 972 {
 973         if (wps_build_cred_network_idx(msg, cred) ||
 974             wps_build_cred_ssid(msg, cred) ||
 975             wps_build_cred_auth_type(msg, cred) ||
 976             wps_build_cred_encr_type(msg, cred) ||
 977             wps_build_cred_network_key(msg, cred) ||
 978             wps_build_cred_mac_addr(msg, cred))
 979                 return -1;
 980         return 0;
 981 }
 982
 983
 984 static int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
 985 {
 986         struct wpabuf *cred;
 987
 988         if (wps->wps->registrar->skip_cred_build)
 989                 goto skip_cred_build;
 990
 991         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
 992         os_memset(&wps->cred, 0, sizeof(wps->cred));
 993
 994         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
 995         wps->cred.ssid_len = wps->wps->ssid_len;
 996
 997         /* Select the best authentication and encryption type */
 998         if (wps->auth_type & WPS_AUTH_WPA2PSK)
 999                 wps->auth_type = WPS_AUTH_WPA2PSK;
1000         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1001                 wps->auth_type = WPS_AUTH_WPAPSK;
1002         else if (wps->auth_type & WPS_AUTH_OPEN)
1003                 wps->auth_type = WPS_AUTH_OPEN;
1004         else if (wps->auth_type & WPS_AUTH_SHARED)
1005                 wps->auth_type = WPS_AUTH_SHARED;
1006         else {
1007                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1008                            wps->auth_type);
1009                 return -1;
1010         }
1011         wps->cred.auth_type = wps->auth_type;
1012
1013         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1014             wps->auth_type == WPS_AUTH_WPAPSK) {
1015                 if (wps->encr_type & WPS_ENCR_AES)
1016                         wps->encr_type = WPS_ENCR_AES;
1017                 else if (wps->encr_type & WPS_ENCR_TKIP)
1018                         wps->encr_type = WPS_ENCR_TKIP;
1019                 else {
1020                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1021                                    "type for WPA/WPA2");
1022                         return -1;
1023                 }
1024         } else {
1025                 if (wps->encr_type & WPS_ENCR_WEP)
1026                         wps->encr_type = WPS_ENCR_WEP;
1027                 else if (wps->encr_type & WPS_ENCR_NONE)
1028                         wps->encr_type = WPS_ENCR_NONE;
1029                 else {
1030                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1031                                    "type for non-WPA/WPA2 mode");
1032                         return -1;
1033                 }
1034         }
1035         wps->cred.encr_type = wps->encr_type;
1036         /* Set MAC address in the Credential to be the AP's address (BSSID) */
1037         os_memcpy(wps->cred.mac_addr, wps->wps->dev.mac_addr, ETH_ALEN);
1038
1039         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1040             !wps->wps->registrar->disable_auto_conf) {
1041                 u8 r[16];
1042                 /* Generate a random passphrase */
1043                 if (os_get_random(r, sizeof(r)) < 0)
1044                         return -1;
1045                 os_free(wps->new_psk);
1046                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1047                 if (wps->new_psk == NULL)
1048                         return -1;
1049                 wps->new_psk_len--; /* remove newline */
1050                 while (wps->new_psk_len &&
1051                        wps->new_psk[wps->new_psk_len - 1] == '=')
1052                         wps->new_psk_len--;
1053                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1054                                       wps->new_psk, wps->new_psk_len);
1055                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1056                 wps->cred.key_len = wps->new_psk_len;
1057         } else if (wps->wps->network_key) {
1058                 os_memcpy(wps->cred.key, wps->wps->network_key,
1059                           wps->wps->network_key_len);
1060                 wps->cred.key_len = wps->wps->network_key_len;
1061         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1062                 char hex[65];
1063                 /* Generate a random per-device PSK */
1064                 os_free(wps->new_psk);
1065                 wps->new_psk_len = 32;
1066                 wps->new_psk = os_malloc(wps->new_psk_len);
1067                 if (wps->new_psk == NULL)
1068                         return -1;
1069                 if (os_get_random(wps->new_psk, wps->new_psk_len) < 0) {
1070                         os_free(wps->new_psk);
1071                         wps->new_psk = NULL;
1072                         return -1;
1073                 }
1074                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1075                                 wps->new_psk, wps->new_psk_len);
1076                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1077                                  wps->new_psk_len);
1078                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1079                 wps->cred.key_len = wps->new_psk_len * 2;
1080         }
1081
1082         cred = wpabuf_alloc(200);
1083         if (cred == NULL)
1084                 return -1;
1085
1086         if (wps_build_credential(cred, &wps->cred)) {
1087                 wpabuf_free(cred);
1088                 return -1;
1089         }
1090
1091         wpabuf_put_be16(msg, ATTR_CRED);
1092         wpabuf_put_be16(msg, wpabuf_len(cred));
1093         wpabuf_put_buf(msg, cred);
1094         wpabuf_free(cred);
1095
1096 skip_cred_build:
1097         if (wps->wps->registrar->extra_cred) {
1098                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1099                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1100         }
1101
1102         return 0;
1103 }
1104
1105
1106 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1107 {
1108         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1109
1110         if (wps_build_credential(msg, &wps->cred))
1111                 return -1;
1112
1113         return 0;
1114 }
1115
1116
1117 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1118 {
1119         struct wpabuf *msg;
1120
1121         if (os_get_random(wps->nonce_r, WPS_NONCE_LEN) < 0)
1122                 return NULL;
1123         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1124                     wps->nonce_r, WPS_NONCE_LEN);
1125         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1126
1127         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1128         msg = wpabuf_alloc(1000);
1129         if (msg == NULL)
1130                 return NULL;
1131
1132         if (wps_build_version(msg) ||
1133             wps_build_msg_type(msg, WPS_M2) ||
1134             wps_build_enrollee_nonce(wps, msg) ||
1135             wps_build_registrar_nonce(wps, msg) ||
1136             wps_build_uuid_r(wps, msg) ||
1137             wps_build_public_key(wps, msg) ||
1138             wps_derive_keys(wps) ||
1139             wps_build_auth_type_flags(wps, msg) ||
1140             wps_build_encr_type_flags(wps, msg) ||
1141             wps_build_conn_type_flags(wps, msg) ||
1142             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1143             wps_build_device_attrs(&wps->wps->dev, msg) ||
1144             wps_build_rf_bands(&wps->wps->dev, msg) ||
1145             wps_build_assoc_state(wps, msg) ||
1146             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1147             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1148             wps_build_os_version(&wps->wps->dev, msg) ||
1149             wps_build_authenticator(wps, msg)) {
1150                 wpabuf_free(msg);
1151                 return NULL;
1152         }
1153
1154         wps->state = RECV_M3;
1155         return msg;
1156 }
1157
1158
1159 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1160 {
1161         struct wpabuf *msg;
1162         u16 err = WPS_CFG_NO_ERROR;
1163
1164         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1165         msg = wpabuf_alloc(1000);
1166         if (msg == NULL)
1167                 return NULL;
1168
1169         if (wps->wps->ap && wps->wps->ap_setup_locked)
1170                 err = WPS_CFG_SETUP_LOCKED;
1171
1172         if (wps_build_version(msg) ||
1173             wps_build_msg_type(msg, WPS_M2D) ||
1174             wps_build_enrollee_nonce(wps, msg) ||
1175             wps_build_registrar_nonce(wps, msg) ||
1176             wps_build_uuid_r(wps, msg) ||
1177             wps_build_auth_type_flags(wps, msg) ||
1178             wps_build_encr_type_flags(wps, msg) ||
1179             wps_build_conn_type_flags(wps, msg) ||
1180             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1181             wps_build_device_attrs(&wps->wps->dev, msg) ||
1182             wps_build_rf_bands(&wps->wps->dev, msg) ||
1183             wps_build_assoc_state(wps, msg) ||
1184             wps_build_config_error(msg, err) ||
1185             wps_build_os_version(&wps->wps->dev, msg)) {
1186                 wpabuf_free(msg);
1187                 return NULL;
1188         }
1189
1190         wps->state = RECV_M2D_ACK;
1191         return msg;
1192 }
1193
1194
1195 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1196 {
1197         struct wpabuf *msg, *plain;
1198
1199         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1200
1201         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1202
1203         plain = wpabuf_alloc(200);
1204         if (plain == NULL)
1205                 return NULL;
1206
1207         msg = wpabuf_alloc(1000);
1208         if (msg == NULL) {
1209                 wpabuf_free(plain);
1210                 return NULL;
1211         }
1212
1213         if (wps_build_version(msg) ||
1214             wps_build_msg_type(msg, WPS_M4) ||
1215             wps_build_enrollee_nonce(wps, msg) ||
1216             wps_build_r_hash(wps, msg) ||
1217             wps_build_r_snonce1(wps, plain) ||
1218             wps_build_key_wrap_auth(wps, plain) ||
1219             wps_build_encr_settings(wps, msg, plain) ||
1220             wps_build_authenticator(wps, msg)) {
1221                 wpabuf_free(plain);
1222                 wpabuf_free(msg);
1223                 return NULL;
1224         }
1225         wpabuf_free(plain);
1226
1227         wps->state = RECV_M5;
1228         return msg;
1229 }
1230
1231
1232 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1233 {
1234         struct wpabuf *msg, *plain;
1235
1236         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1237
1238         plain = wpabuf_alloc(200);
1239         if (plain == NULL)
1240                 return NULL;
1241
1242         msg = wpabuf_alloc(1000);
1243         if (msg == NULL) {
1244                 wpabuf_free(plain);
1245                 return NULL;
1246         }
1247
1248         if (wps_build_version(msg) ||
1249             wps_build_msg_type(msg, WPS_M6) ||
1250             wps_build_enrollee_nonce(wps, msg) ||
1251             wps_build_r_snonce2(wps, plain) ||
1252             wps_build_key_wrap_auth(wps, plain) ||
1253             wps_build_encr_settings(wps, msg, plain) ||
1254             wps_build_authenticator(wps, msg)) {
1255                 wpabuf_free(plain);
1256                 wpabuf_free(msg);
1257                 return NULL;
1258         }
1259         wpabuf_free(plain);
1260
1261         wps->wps_pin_revealed = 1;
1262         wps->state = RECV_M7;
1263         return msg;
1264 }
1265
1266
1267 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1268 {
1269         struct wpabuf *msg, *plain;
1270
1271         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1272
1273         plain = wpabuf_alloc(500);
1274         if (plain == NULL)
1275                 return NULL;
1276
1277         msg = wpabuf_alloc(1000);
1278         if (msg == NULL) {
1279                 wpabuf_free(plain);
1280                 return NULL;
1281         }
1282
1283         if (wps_build_version(msg) ||
1284             wps_build_msg_type(msg, WPS_M8) ||
1285             wps_build_enrollee_nonce(wps, msg) ||
1286             (wps->wps->ap && wps_build_cred(wps, plain)) ||
1287             (!wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
1288             wps_build_key_wrap_auth(wps, plain) ||
1289             wps_build_encr_settings(wps, msg, plain) ||
1290             wps_build_authenticator(wps, msg)) {
1291                 wpabuf_free(plain);
1292                 wpabuf_free(msg);
1293                 return NULL;
1294         }
1295         wpabuf_free(plain);
1296
1297         wps->state = RECV_DONE;
1298         return msg;
1299 }
1300
1301
1302 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
1303 {
1304         struct wpabuf *msg;
1305
1306         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
1307
1308         msg = wpabuf_alloc(1000);
1309         if (msg == NULL)
1310                 return NULL;
1311
1312         if (wps_build_version(msg) ||
1313             wps_build_msg_type(msg, WPS_WSC_ACK) ||
1314             wps_build_enrollee_nonce(wps, msg) ||
1315             wps_build_registrar_nonce(wps, msg)) {
1316                 wpabuf_free(msg);
1317                 return NULL;
1318         }
1319
1320         return msg;
1321 }
1322
1323
1324 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
1325 {
1326         struct wpabuf *msg;
1327
1328         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
1329
1330         msg = wpabuf_alloc(1000);
1331         if (msg == NULL)
1332                 return NULL;
1333
1334         if (wps_build_version(msg) ||
1335             wps_build_msg_type(msg, WPS_WSC_NACK) ||
1336             wps_build_enrollee_nonce(wps, msg) ||
1337             wps_build_registrar_nonce(wps, msg) ||
1338             wps_build_config_error(msg, wps->config_error)) {
1339                 wpabuf_free(msg);
1340                 return NULL;
1341         }
1342
1343         return msg;
1344 }
1345
1346
1347 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1348                                       enum wsc_op_code *op_code)
1349 {
1350         struct wpabuf *msg;
1351
1352 #ifdef CONFIG_WPS_UPNP
1353         if (wps->wps->wps_upnp) {
1354                 struct upnp_pending_message *p, *prev = NULL;
1355                 if (wps->ext_reg > 1)
1356                         wps_registrar_free_pending_m2(wps->wps);
1357                 p = wps->wps->upnp_msgs;
1358                 /* TODO: check pending message MAC address */
1359                 while (p && p->next) {
1360                         prev = p;
1361                         p = p->next;
1362                 }
1363                 if (p) {
1364                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1365                                    "UPnP");
1366                         if (prev)
1367                                 prev->next = NULL;
1368                         else
1369                                 wps->wps->upnp_msgs = NULL;
1370                         msg = p->msg;
1371                         os_free(p);
1372                         *op_code = WSC_MSG;
1373                         if (wps->ext_reg == 0)
1374                                 wps->ext_reg = 1;
1375                         return msg;
1376                 }
1377         }
1378         if (wps->ext_reg) {
1379                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1380                            "pending message available");
1381                 return NULL;
1382         }
1383 #endif /* CONFIG_WPS_UPNP */
1384
1385         switch (wps->state) {
1386         case SEND_M2:
1387                 if (wps_get_dev_password(wps) < 0)
1388                         msg = wps_build_m2d(wps);
1389                 else
1390                         msg = wps_build_m2(wps);
1391                 *op_code = WSC_MSG;
1392                 break;
1393         case SEND_M2D:
1394                 msg = wps_build_m2d(wps);
1395                 *op_code = WSC_MSG;
1396                 break;
1397         case SEND_M4:
1398                 msg = wps_build_m4(wps);
1399                 *op_code = WSC_MSG;
1400                 break;
1401         case SEND_M6:
1402                 msg = wps_build_m6(wps);
1403                 *op_code = WSC_MSG;
1404                 break;
1405         case SEND_M8:
1406                 msg = wps_build_m8(wps);
1407                 *op_code = WSC_MSG;
1408                 break;
1409         case RECV_DONE:
1410                 msg = wps_build_wsc_ack(wps);
1411                 *op_code = WSC_ACK;
1412                 break;
1413         case SEND_WSC_NACK:
1414                 msg = wps_build_wsc_nack(wps);
1415                 *op_code = WSC_NACK;
1416                 break;
1417         default:
1418                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1419                            "a message", wps->state);
1420                 msg = NULL;
1421                 break;
1422         }
1423
1424         if (*op_code == WSC_MSG && msg) {
1425                 /* Save a copy of the last message for Authenticator derivation
1426                  */
1427                 wpabuf_free(wps->last_msg);
1428                 wps->last_msg = wpabuf_dup(msg);
1429         }
1430
1431         return msg;
1432 }
1433
1434
1435 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1436 {
1437         if (e_nonce == NULL) {
1438                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1439                 return -1;
1440         }
1441
1442         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1443         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1444                     wps->nonce_e, WPS_NONCE_LEN);
1445
1446         return 0;
1447 }
1448
1449
1450 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1451 {
1452         if (r_nonce == NULL) {
1453                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1454                 return -1;
1455         }
1456
1457         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1458                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1459                 return -1;
1460         }
1461
1462         return 0;
1463 }
1464
1465
1466 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1467 {
1468         if (uuid_e == NULL) {
1469                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1470                 return -1;
1471         }
1472
1473         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1474         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1475
1476         return 0;
1477 }
1478
1479
1480 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1481 {
1482         if (pw_id == NULL) {
1483                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1484                 return -1;
1485         }
1486
1487         wps->dev_pw_id = WPA_GET_BE16(pw_id);
1488         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1489
1490         return 0;
1491 }
1492
1493
1494 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
1495 {
1496         if (e_hash1 == NULL) {
1497                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
1498                 return -1;
1499         }
1500
1501         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
1502         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
1503
1504         return 0;
1505 }
1506
1507
1508 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
1509 {
1510         if (e_hash2 == NULL) {
1511                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
1512                 return -1;
1513         }
1514
1515         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
1516         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
1517
1518         return 0;
1519 }
1520
1521
1522 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
1523 {
1524         u8 hash[SHA256_MAC_LEN];
1525         const u8 *addr[4];
1526         size_t len[4];
1527
1528         if (e_snonce1 == NULL) {
1529                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
1530                 return -1;
1531         }
1532
1533         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
1534                         WPS_SECRET_NONCE_LEN);
1535
1536         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
1537         addr[0] = e_snonce1;
1538         len[0] = WPS_SECRET_NONCE_LEN;
1539         addr[1] = wps->psk1;
1540         len[1] = WPS_PSK_LEN;
1541         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1542         len[2] = wpabuf_len(wps->dh_pubkey_e);
1543         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1544         len[3] = wpabuf_len(wps->dh_pubkey_r);
1545         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1546
1547         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
1548                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
1549                            "not match with the pre-committed value");
1550                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
1551                 wps_pwd_auth_fail_event(wps->wps, 0, 1);
1552                 return -1;
1553         }
1554
1555         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
1556                    "half of the device password");
1557
1558         return 0;
1559 }
1560
1561
1562 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
1563 {
1564         u8 hash[SHA256_MAC_LEN];
1565         const u8 *addr[4];
1566         size_t len[4];
1567
1568         if (e_snonce2 == NULL) {
1569                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
1570                 return -1;
1571         }
1572
1573         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
1574                         WPS_SECRET_NONCE_LEN);
1575
1576         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
1577         addr[0] = e_snonce2;
1578         len[0] = WPS_SECRET_NONCE_LEN;
1579         addr[1] = wps->psk2;
1580         len[1] = WPS_PSK_LEN;
1581         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1582         len[2] = wpabuf_len(wps->dh_pubkey_e);
1583         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1584         len[3] = wpabuf_len(wps->dh_pubkey_r);
1585         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1586
1587         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
1588                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
1589                            "not match with the pre-committed value");
1590                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
1591                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
1592                 wps_pwd_auth_fail_event(wps->wps, 0, 2);
1593                 return -1;
1594         }
1595
1596         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
1597                    "half of the device password");
1598         wps->wps_pin_revealed = 0;
1599         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
1600
1601         return 0;
1602 }
1603
1604
1605 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
1606 {
1607         if (mac_addr == NULL) {
1608                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
1609                 return -1;
1610         }
1611
1612         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
1613                    MAC2STR(mac_addr));
1614         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
1615         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
1616
1617         return 0;
1618 }
1619
1620
1621 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
1622                               size_t pk_len)
1623 {
1624         if (pk == NULL || pk_len == 0) {
1625                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
1626                 return -1;
1627         }
1628
1629         wpabuf_free(wps->dh_pubkey_e);
1630         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
1631         if (wps->dh_pubkey_e == NULL)
1632                 return -1;
1633
1634         return 0;
1635 }
1636
1637
1638 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
1639 {
1640         u16 auth_types;
1641
1642         if (auth == NULL) {
1643                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
1644                            "received");
1645                 return -1;
1646         }
1647
1648         auth_types = WPA_GET_BE16(auth);
1649
1650         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
1651                    auth_types);
1652         wps->auth_type = wps->wps->auth_types & auth_types;
1653         if (wps->auth_type == 0) {
1654                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
1655                            "authentication types (own 0x%x Enrollee 0x%x)",
1656                            wps->wps->auth_types, auth_types);
1657                 return -1;
1658         }
1659
1660         return 0;
1661 }
1662
1663
1664 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
1665 {
1666         u16 encr_types;
1667
1668         if (encr == NULL) {
1669                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
1670                            "received");
1671                 return -1;
1672         }
1673
1674         encr_types = WPA_GET_BE16(encr);
1675
1676         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
1677                    encr_types);
1678         wps->encr_type = wps->wps->encr_types & encr_types;
1679         if (wps->encr_type == 0) {
1680                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
1681                            "encryption types");
1682                 return -1;
1683         }
1684
1685         return 0;
1686 }
1687
1688
1689 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
1690 {
1691         if (conn == NULL) {
1692                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
1693                            "received");
1694                 return -1;
1695         }
1696
1697         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
1698                    *conn);
1699
1700         return 0;
1701 }
1702
1703
1704 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
1705 {
1706         u16 m;
1707
1708         if (methods == NULL) {
1709                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
1710                 return -1;
1711         }
1712
1713         m = WPA_GET_BE16(methods);
1714
1715         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x", m);
1716
1717         return 0;
1718 }
1719
1720
1721 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
1722 {
1723         if (state == NULL) {
1724                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
1725                            "received");
1726                 return -1;
1727         }
1728
1729         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
1730                    *state);
1731
1732         return 0;
1733 }
1734
1735
1736 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
1737 {
1738         u16 a;
1739
1740         if (assoc == NULL) {
1741                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
1742                 return -1;
1743         }
1744
1745         a = WPA_GET_BE16(assoc);
1746         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
1747
1748         return 0;
1749 }
1750
1751
1752 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
1753 {
1754         u16 e;
1755
1756         if (err == NULL) {
1757                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
1758                 return -1;
1759         }
1760
1761         e = WPA_GET_BE16(err);
1762         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
1763
1764         return 0;
1765 }
1766
1767
1768 static enum wps_process_res wps_process_m1(struct wps_data *wps,
1769                                            struct wps_parse_attr *attr)
1770 {
1771         wpa_printf(MSG_DEBUG, "WPS: Received M1");
1772
1773         if (wps->state != RECV_M1) {
1774                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
1775                            "receiving M1", wps->state);
1776                 return WPS_FAILURE;
1777         }
1778
1779         if (wps_process_uuid_e(wps, attr->uuid_e) ||
1780             wps_process_mac_addr(wps, attr->mac_addr) ||
1781             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
1782             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
1783             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
1784             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
1785             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
1786             wps_process_config_methods(wps, attr->config_methods) ||
1787             wps_process_wps_state(wps, attr->wps_state) ||
1788             wps_process_device_attrs(&wps->peer_dev, attr) ||
1789             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
1790             wps_process_assoc_state(wps, attr->assoc_state) ||
1791             wps_process_dev_password_id(wps, attr->dev_password_id) ||
1792             wps_process_config_error(wps, attr->config_error) ||
1793             wps_process_os_version(&wps->peer_dev, attr->os_version))
1794                 return WPS_FAILURE;
1795
1796         if (wps->dev_pw_id != DEV_PW_DEFAULT &&
1797             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
1798             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
1799             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
1800             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
1801              !wps->wps->registrar->pbc)) {
1802                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
1803                            wps->dev_pw_id);
1804                 wps->state = SEND_M2D;
1805                 return WPS_CONTINUE;
1806         }
1807
1808         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
1809                 if (wps_registrar_pbc_overlap(wps->wps->registrar,
1810                                               wps->mac_addr_e, wps->uuid_e)) {
1811                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
1812                                    "negotiation");
1813                         wps->state = SEND_M2D;
1814                         return WPS_CONTINUE;
1815                 }
1816                 wps_registrar_add_pbc_session(wps->wps->registrar,
1817                                               wps->mac_addr_e, wps->uuid_e);
1818                 wps->pbc = 1;
1819         }
1820
1821         wps->state = SEND_M2;
1822         return WPS_CONTINUE;
1823 }
1824
1825
1826 static enum wps_process_res wps_process_m3(struct wps_data *wps,
1827                                            const struct wpabuf *msg,
1828                                            struct wps_parse_attr *attr)
1829 {
1830         wpa_printf(MSG_DEBUG, "WPS: Received M3");
1831
1832         if (wps->state != RECV_M3) {
1833                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
1834                            "receiving M3", wps->state);
1835                 wps->state = SEND_WSC_NACK;
1836                 return WPS_CONTINUE;
1837         }
1838
1839         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
1840             wps_process_authenticator(wps, attr->authenticator, msg) ||
1841             wps_process_e_hash1(wps, attr->e_hash1) ||
1842             wps_process_e_hash2(wps, attr->e_hash2)) {
1843                 wps->state = SEND_WSC_NACK;
1844                 return WPS_CONTINUE;
1845         }
1846
1847         wps->state = SEND_M4;
1848         return WPS_CONTINUE;
1849 }
1850
1851
1852 static enum wps_process_res wps_process_m5(struct wps_data *wps,
1853                                            const struct wpabuf *msg,
1854                                            struct wps_parse_attr *attr)
1855 {
1856         struct wpabuf *decrypted;
1857         struct wps_parse_attr eattr;
1858
1859         wpa_printf(MSG_DEBUG, "WPS: Received M5");
1860
1861         if (wps->state != RECV_M5) {
1862                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
1863                            "receiving M5", wps->state);
1864                 wps->state = SEND_WSC_NACK;
1865                 return WPS_CONTINUE;
1866         }
1867
1868         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
1869             wps_process_authenticator(wps, attr->authenticator, msg)) {
1870                 wps->state = SEND_WSC_NACK;
1871                 return WPS_CONTINUE;
1872         }
1873
1874         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
1875                                               attr->encr_settings_len);
1876         if (decrypted == NULL) {
1877                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
1878                            "Settings attribute");
1879                 wps->state = SEND_WSC_NACK;
1880                 return WPS_CONTINUE;
1881         }
1882
1883         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
1884                    "attribute");
1885         if (wps_parse_msg(decrypted, &eattr) < 0 ||
1886             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
1887             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
1888                 wpabuf_free(decrypted);
1889                 wps->state = SEND_WSC_NACK;
1890                 return WPS_CONTINUE;
1891         }
1892         wpabuf_free(decrypted);
1893
1894         wps->state = SEND_M6;
1895         return WPS_CONTINUE;
1896 }
1897
1898
1899 static int wps_process_ap_settings_r(struct wps_data *wps,
1900                                      struct wps_parse_attr *attr)
1901 {
1902         if (wps->wps->ap)
1903                 return 0;
1904
1905         /* AP Settings Attributes in M7 when Enrollee is an AP */
1906         if (wps_process_ap_settings(attr, &wps->cred) < 0)
1907                 return -1;
1908
1909         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
1910
1911         /*
1912          * TODO: Provide access to AP settings and allow changes before sending
1913          * out M8. For now, just copy the settings unchanged into M8.
1914          */
1915
1916         return 0;
1917 }
1918
1919
1920 static enum wps_process_res wps_process_m7(struct wps_data *wps,
1921                                            const struct wpabuf *msg,
1922                                            struct wps_parse_attr *attr)
1923 {
1924         struct wpabuf *decrypted;
1925         struct wps_parse_attr eattr;
1926
1927         wpa_printf(MSG_DEBUG, "WPS: Received M7");
1928
1929         if (wps->state != RECV_M7) {
1930                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
1931                            "receiving M7", wps->state);
1932                 wps->state = SEND_WSC_NACK;
1933                 return WPS_CONTINUE;
1934         }
1935
1936         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
1937             wps_process_authenticator(wps, attr->authenticator, msg)) {
1938                 wps->state = SEND_WSC_NACK;
1939                 return WPS_CONTINUE;
1940         }
1941
1942         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
1943                                               attr->encr_settings_len);
1944         if (decrypted == NULL) {
1945                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
1946                            "Settings attribute");
1947                 wps->state = SEND_WSC_NACK;
1948                 return WPS_CONTINUE;
1949         }
1950
1951         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
1952                    "attribute");
1953         if (wps_parse_msg(decrypted, &eattr) < 0 ||
1954             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
1955             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
1956             wps_process_ap_settings_r(wps, &eattr)) {
1957                 wpabuf_free(decrypted);
1958                 wps->state = SEND_WSC_NACK;
1959                 return WPS_CONTINUE;
1960         }
1961
1962         wpabuf_free(decrypted);
1963
1964         wps->state = SEND_M8;
1965         return WPS_CONTINUE;
1966 }
1967
1968
1969 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
1970                                                 const struct wpabuf *msg)
1971 {
1972         struct wps_parse_attr attr;
1973         enum wps_process_res ret = WPS_CONTINUE;
1974
1975         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
1976
1977         if (wps_parse_msg(msg, &attr) < 0)
1978                 return WPS_FAILURE;
1979
1980         if (!wps_version_supported(attr.version)) {
1981                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1982                            attr.version ? *attr.version : 0);
1983                 return WPS_FAILURE;
1984         }
1985
1986         if (attr.msg_type == NULL) {
1987                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1988                 return WPS_FAILURE;
1989         }
1990
1991         if (*attr.msg_type != WPS_M1 &&
1992             (attr.registrar_nonce == NULL ||
1993              os_memcmp(wps->nonce_r, attr.registrar_nonce,
1994                        WPS_NONCE_LEN != 0))) {
1995                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1996                 return WPS_FAILURE;
1997         }
1998
1999         switch (*attr.msg_type) {
2000         case WPS_M1:
2001 #ifdef CONFIG_WPS_UPNP
2002                 if (wps->wps->wps_upnp && attr.mac_addr) {
2003                         /* Remove old pending messages when starting new run */
2004                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2005                         wps->wps->upnp_msgs = NULL;
2006
2007                         upnp_wps_device_send_wlan_event(
2008                                 wps->wps->wps_upnp, attr.mac_addr,
2009                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2010                 }
2011 #endif /* CONFIG_WPS_UPNP */
2012                 ret = wps_process_m1(wps, &attr);
2013                 break;
2014         case WPS_M3:
2015                 ret = wps_process_m3(wps, msg, &attr);
2016                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2017                         wps_fail_event(wps->wps, WPS_M3);
2018                 break;
2019         case WPS_M5:
2020                 ret = wps_process_m5(wps, msg, &attr);
2021                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2022                         wps_fail_event(wps->wps, WPS_M5);
2023                 break;
2024         case WPS_M7:
2025                 ret = wps_process_m7(wps, msg, &attr);
2026                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2027                         wps_fail_event(wps->wps, WPS_M7);
2028                 break;
2029         default:
2030                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2031                            *attr.msg_type);
2032                 return WPS_FAILURE;
2033         }
2034
2035         if (ret == WPS_CONTINUE) {
2036                 /* Save a copy of the last message for Authenticator derivation
2037                  */
2038                 wpabuf_free(wps->last_msg);
2039                 wps->last_msg = wpabuf_dup(msg);
2040         }
2041
2042         return ret;
2043 }
2044
2045
2046 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2047                                                 const struct wpabuf *msg)
2048 {
2049         struct wps_parse_attr attr;
2050
2051         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2052
2053         if (wps_parse_msg(msg, &attr) < 0)
2054                 return WPS_FAILURE;
2055
2056         if (!wps_version_supported(attr.version)) {
2057                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2058                            attr.version ? *attr.version : 0);
2059                 return WPS_FAILURE;
2060         }
2061
2062         if (attr.msg_type == NULL) {
2063                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2064                 return WPS_FAILURE;
2065         }
2066
2067         if (*attr.msg_type != WPS_WSC_ACK) {
2068                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2069                            *attr.msg_type);
2070                 return WPS_FAILURE;
2071         }
2072
2073 #ifdef CONFIG_WPS_UPNP
2074         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2075             upnp_wps_subscribers(wps->wps->wps_upnp)) {
2076                 if (wps->wps->upnp_msgs)
2077                         return WPS_CONTINUE;
2078                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2079                            "external Registrar");
2080                 return WPS_PENDING;
2081         }
2082 #endif /* CONFIG_WPS_UPNP */
2083
2084         if (attr.registrar_nonce == NULL ||
2085             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2086         {
2087                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2088                 return WPS_FAILURE;
2089         }
2090
2091         if (attr.enrollee_nonce == NULL ||
2092             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2093                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2094                 return WPS_FAILURE;
2095         }
2096
2097         if (wps->state == RECV_M2D_ACK) {
2098 #ifdef CONFIG_WPS_UPNP
2099                 if (wps->wps->wps_upnp &&
2100                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
2101                         if (wps->wps->upnp_msgs)
2102                                 return WPS_CONTINUE;
2103                         if (wps->ext_reg == 0)
2104                                 wps->ext_reg = 1;
2105                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2106                                    "external Registrar");
2107                         return WPS_PENDING;
2108                 }
2109 #endif /* CONFIG_WPS_UPNP */
2110
2111                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2112                            "terminate negotiation");
2113         }
2114
2115         return WPS_FAILURE;
2116 }
2117
2118
2119 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2120                                                  const struct wpabuf *msg)
2121 {
2122         struct wps_parse_attr attr;
2123         int old_state;
2124
2125         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2126
2127         old_state = wps->state;
2128         wps->state = SEND_WSC_NACK;
2129
2130         if (wps_parse_msg(msg, &attr) < 0)
2131                 return WPS_FAILURE;
2132
2133         if (!wps_version_supported(attr.version)) {
2134                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2135                            attr.version ? *attr.version : 0);
2136                 return WPS_FAILURE;
2137         }
2138
2139         if (attr.msg_type == NULL) {
2140                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2141                 return WPS_FAILURE;
2142         }
2143
2144         if (*attr.msg_type != WPS_WSC_NACK) {
2145                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2146                            *attr.msg_type);
2147                 return WPS_FAILURE;
2148         }
2149
2150 #ifdef CONFIG_WPS_UPNP
2151         if (wps->wps->wps_upnp && wps->ext_reg) {
2152                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2153                            "Registrar terminated by the Enrollee");
2154                 return WPS_FAILURE;
2155         }
2156 #endif /* CONFIG_WPS_UPNP */
2157
2158         if (attr.registrar_nonce == NULL ||
2159             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2160         {
2161                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2162                 return WPS_FAILURE;
2163         }
2164
2165         if (attr.enrollee_nonce == NULL ||
2166             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2167                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2168                 return WPS_FAILURE;
2169         }
2170
2171         if (attr.config_error == NULL) {
2172                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2173                            "in WSC_NACK");
2174                 return WPS_FAILURE;
2175         }
2176
2177         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2178                    "Configuration Error %d", WPA_GET_BE16(attr.config_error));
2179
2180         switch (old_state) {
2181         case RECV_M3:
2182                 wps_fail_event(wps->wps, WPS_M2);
2183                 break;
2184         case RECV_M5:
2185                 wps_fail_event(wps->wps, WPS_M4);
2186                 break;
2187         case RECV_M7:
2188                 wps_fail_event(wps->wps, WPS_M6);
2189                 break;
2190         case RECV_DONE:
2191                 wps_fail_event(wps->wps, WPS_M8);
2192                 break;
2193         default:
2194                 break;
2195         }
2196
2197         return WPS_FAILURE;
2198 }
2199
2200
2201 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2202                                                  const struct wpabuf *msg)
2203 {
2204         struct wps_parse_attr attr;
2205
2206         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2207
2208         if (wps->state != RECV_DONE &&
2209             (!wps->wps->wps_upnp || !wps->ext_reg)) {
2210                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2211                            "receiving WSC_Done", wps->state);
2212                 return WPS_FAILURE;
2213         }
2214
2215         if (wps_parse_msg(msg, &attr) < 0)
2216                 return WPS_FAILURE;
2217
2218         if (!wps_version_supported(attr.version)) {
2219                 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2220                            attr.version ? *attr.version : 0);
2221                 return WPS_FAILURE;
2222         }
2223
2224         if (attr.msg_type == NULL) {
2225                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2226                 return WPS_FAILURE;
2227         }
2228
2229         if (*attr.msg_type != WPS_WSC_DONE) {
2230                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2231                            *attr.msg_type);
2232                 return WPS_FAILURE;
2233         }
2234
2235 #ifdef CONFIG_WPS_UPNP
2236         if (wps->wps->wps_upnp && wps->ext_reg) {
2237                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2238                            "Registrar completed successfully");
2239                 return WPS_DONE;
2240         }
2241 #endif /* CONFIG_WPS_UPNP */
2242
2243         if (attr.registrar_nonce == NULL ||
2244             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2245         {
2246                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2247                 return WPS_FAILURE;
2248         }
2249
2250         if (attr.enrollee_nonce == NULL ||
2251             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2252                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2253                 return WPS_FAILURE;
2254         }
2255
2256         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
2257
2258         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
2259             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
2260                 struct wps_credential cred;
2261
2262                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
2263                            "on first Enrollee connection");
2264
2265                 os_memset(&cred, 0, sizeof(cred));
2266                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
2267                 cred.ssid_len = wps->wps->ssid_len;
2268                 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
2269                 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
2270                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
2271                 cred.key_len = wps->new_psk_len;
2272
2273                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
2274                 wpa_hexdump_ascii_key(MSG_DEBUG,
2275                                       "WPS: Generated random passphrase",
2276                                       wps->new_psk, wps->new_psk_len);
2277                 if (wps->wps->cred_cb)
2278                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
2279
2280                 os_free(wps->new_psk);
2281                 wps->new_psk = NULL;
2282         }
2283
2284         if (!wps->wps->ap) {
2285                 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based "
2286                            "on the modified AP configuration");
2287                 if (wps->wps->cred_cb)
2288                         wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2289         }
2290
2291         if (wps->new_psk) {
2292                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
2293                                    wps->new_psk, wps->new_psk_len)) {
2294                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
2295                                    "new PSK");
2296                 }
2297                 os_free(wps->new_psk);
2298                 wps->new_psk = NULL;
2299         }
2300
2301         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
2302
2303         if (wps->pbc) {
2304                 wps_registrar_remove_pbc_session(wps->wps->registrar,
2305                                                  wps->mac_addr_e, wps->uuid_e);
2306                 wps_registrar_pbc_completed(wps->wps->registrar);
2307         }
2308
2309         wps_success_event(wps->wps);
2310
2311         return WPS_DONE;
2312 }
2313
2314
2315 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
2316                                                enum wsc_op_code op_code,
2317                                                const struct wpabuf *msg)
2318 {
2319         enum wps_process_res ret;
2320
2321         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
2322                    "op_code=%d)",
2323                    (unsigned long) wpabuf_len(msg), op_code);
2324
2325 #ifdef CONFIG_WPS_UPNP
2326         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
2327                 struct wps_parse_attr attr;
2328                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
2329                     *attr.msg_type == WPS_M3)
2330                         wps->ext_reg = 2; /* past M2/M2D phase */
2331         }
2332         if (wps->ext_reg > 1)
2333                 wps_registrar_free_pending_m2(wps->wps);
2334         if (wps->wps->wps_upnp && wps->ext_reg &&
2335             wps->wps->upnp_msgs == NULL &&
2336             (op_code == WSC_MSG || op_code == WSC_Done)) {
2337                 struct wps_parse_attr attr;
2338                 int type;
2339                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
2340                         type = -1;
2341                 else
2342                         type = *attr.msg_type;
2343                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
2344                            " to external Registrar for processing", type);
2345                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
2346                                                 wps->mac_addr_e,
2347                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
2348                                                 msg);
2349                 if (op_code == WSC_MSG)
2350                         return WPS_PENDING;
2351         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
2352                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
2353                            "external Registrar");
2354                 return WPS_CONTINUE;
2355         }
2356 #endif /* CONFIG_WPS_UPNP */
2357
2358         switch (op_code) {
2359         case WSC_MSG:
2360                 return wps_process_wsc_msg(wps, msg);
2361         case WSC_ACK:
2362                 return wps_process_wsc_ack(wps, msg);
2363         case WSC_NACK:
2364                 return wps_process_wsc_nack(wps, msg);
2365         case WSC_Done:
2366                 ret = wps_process_wsc_done(wps, msg);
2367                 if (ret == WPS_FAILURE) {
2368                         wps->state = SEND_WSC_NACK;
2369                         wps_fail_event(wps->wps, WPS_WSC_DONE);
2370                 }
2371                 return ret;
2372         default:
2373                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
2374                 return WPS_FAILURE;
2375         }
2376 }
2377
2378
2379 int wps_registrar_update_ie(struct wps_registrar *reg)
2380 {
2381         return wps_set_ie(reg);
2382 }
2383
2384
2385 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
2386                                                void *timeout_ctx)
2387 {
2388         struct wps_registrar *reg = eloop_ctx;
2389
2390         wpa_printf(MSG_DEBUG, "WPS: SetSelectedRegistrar timed out - "
2391                    "unselect Registrar");
2392         reg->selected_registrar = 0;
2393         reg->pbc = 0;
2394         reg->sel_reg_dev_password_id_override = -1;
2395         reg->sel_reg_config_methods_override = -1;
2396         wps_set_ie(reg);
2397 }
2398
2399
2400 /**
2401  * wps_registrar_set_selected_registrar - Notification of SetSelectedRegistrar
2402  * @reg: Registrar data from wps_registrar_init()
2403  * @msg: Received message from SetSelectedRegistrar
2404  * @msg_len: Length of msg in octets
2405  * Returns: 0 on success, -1 on failure
2406  *
2407  * This function is called when an AP receives a SetSelectedRegistrar UPnP
2408  * message.
2409  */
2410 int wps_registrar_set_selected_registrar(struct wps_registrar *reg,
2411                                          const struct wpabuf *msg)
2412 {
2413         struct wps_parse_attr attr;
2414
2415         wpa_hexdump_buf(MSG_MSGDUMP, "WPS: SetSelectedRegistrar attributes",
2416                         msg);
2417
2418         if (wps_parse_msg(msg, &attr) < 0)
2419                 return -1;
2420         if (!wps_version_supported(attr.version)) {
2421                 wpa_printf(MSG_DEBUG, "WPS: Unsupported SetSelectedRegistrar "
2422                            "version 0x%x", attr.version ? *attr.version : 0);
2423                 return -1;
2424         }
2425
2426         if (attr.selected_registrar == NULL ||
2427             *attr.selected_registrar == 0) {
2428                 wpa_printf(MSG_DEBUG, "WPS: SetSelectedRegistrar: Disable "
2429                            "Selected Registrar");
2430                 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg,
2431                                      NULL);
2432                 wps_registrar_set_selected_timeout(reg, NULL);
2433                 return 0;
2434         }
2435
2436         reg->selected_registrar = 1;
2437         reg->sel_reg_dev_password_id_override = attr.dev_password_id ?
2438                 WPA_GET_BE16(attr.dev_password_id) : DEV_PW_DEFAULT;
2439         reg->sel_reg_config_methods_override = attr.sel_reg_config_methods ?
2440                 WPA_GET_BE16(attr.sel_reg_config_methods) : -1;
2441         wps_set_ie(reg);
2442
2443         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
2444         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
2445                                wps_registrar_set_selected_timeout,
2446                                reg, NULL);
2447         return 0;
2448 }