www.project-moonshot.org Git - mech_eap.orig/blob - src/wps/wps_registrar.c

   1 /*
   2  * Wi-Fi Protected Setup - Registrar
   3  * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "utils/base64.h"
  19 #include "utils/eloop.h"
  20 #include "utils/uuid.h"
  21 #include "utils/list.h"
  22 #include "crypto/crypto.h"
  23 #include "crypto/sha256.h"
  24 #include "common/ieee802_11_defs.h"
  25 #include "wps_i.h"
  26 #include "wps_dev_attr.h"
  27 #include "wps_upnp.h"
  28 #include "wps_upnp_i.h"
  29
  30 #ifndef CONFIG_WPS_STRICT
  31 #define WPS_WORKAROUNDS
  32 #endif /* CONFIG_WPS_STRICT */
  33
  34 struct wps_uuid_pin {
  35         struct dl_list list;
  36         u8 uuid[WPS_UUID_LEN];
  37         int wildcard_uuid;
  38         u8 *pin;
  39         size_t pin_len;
  40 #define PIN_LOCKED BIT(0)
  41 #define PIN_EXPIRES BIT(1)
  42         int flags;
  43         struct os_time expiration;
  44         u8 enrollee_addr[ETH_ALEN];
  45 };
  46
  47
  48 static void wps_free_pin(struct wps_uuid_pin *pin)
  49 {
  50         os_free(pin->pin);
  51         os_free(pin);
  52 }
  53
  54
  55 static void wps_remove_pin(struct wps_uuid_pin *pin)
  56 {
  57         dl_list_del(&pin->list);
  58         wps_free_pin(pin);
  59 }
  60
  61
  62 static void wps_free_pins(struct dl_list *pins)
  63 {
  64         struct wps_uuid_pin *pin, *prev;
  65         dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
  66                 wps_remove_pin(pin);
  67 }
  68
  69
  70 struct wps_pbc_session {
  71         struct wps_pbc_session *next;
  72         u8 addr[ETH_ALEN];
  73         u8 uuid_e[WPS_UUID_LEN];
  74         struct os_time timestamp;
  75 };
  76
  77
  78 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
  79 {
  80         struct wps_pbc_session *prev;
  81
  82         while (pbc) {
  83                 prev = pbc;
  84                 pbc = pbc->next;
  85                 os_free(prev);
  86         }
  87 }
  88
  89
  90 struct wps_registrar_device {
  91         struct wps_registrar_device *next;
  92         struct wps_device_data dev;
  93         u8 uuid[WPS_UUID_LEN];
  94 };
  95
  96
  97 struct wps_registrar {
  98         struct wps_context *wps;
  99
 100         int pbc;
 101         int selected_registrar;
 102
 103         int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
 104                           size_t psk_len);
 105         int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
 106                          struct wpabuf *probe_resp_ie);
 107         void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
 108                               const struct wps_device_data *dev);
 109         void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
 110                                const u8 *uuid_e);
 111         void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
 112                                u16 sel_reg_config_methods);
 113         void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
 114                                  const u8 *pri_dev_type, u16 config_methods,
 115                                  u16 dev_password_id, u8 request_type,
 116                                  const char *dev_name);
 117         void *cb_ctx;
 118
 119         struct dl_list pins;
 120         struct wps_pbc_session *pbc_sessions;
 121
 122         int skip_cred_build;
 123         struct wpabuf *extra_cred;
 124         int disable_auto_conf;
 125         int sel_reg_union;
 126         int sel_reg_dev_password_id_override;
 127         int sel_reg_config_methods_override;
 128         int static_wep_only;
 129         int dualband;
 130
 131         struct wps_registrar_device *devices;
 132
 133         int force_pbc_overlap;
 134
 135         u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 136         u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 137 };
 138
 139
 140 static int wps_set_ie(struct wps_registrar *reg);
 141 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
 142 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
 143                                                void *timeout_ctx);
 144
 145
 146 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
 147                                              const u8 *addr)
 148 {
 149         int i;
 150         wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
 151                    MAC2STR(addr));
 152         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
 153                 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
 154                         wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
 155                                    "already in the list");
 156                         return; /* already in list */
 157                 }
 158         for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
 159                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
 160                           ETH_ALEN);
 161         os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
 162         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 163                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 164 }
 165
 166
 167 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
 168                                                 const u8 *addr)
 169 {
 170         int i;
 171         wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
 172                    MAC2STR(addr));
 173         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
 174                 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
 175                         break;
 176         }
 177         if (i == WPS_MAX_AUTHORIZED_MACS) {
 178                 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
 179                            "list");
 180                 return; /* not in the list */
 181         }
 182         for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
 183                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
 184                           ETH_ALEN);
 185         os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
 186                   ETH_ALEN);
 187         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 188                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 189 }
 190
 191
 192 static void wps_free_devices(struct wps_registrar_device *dev)
 193 {
 194         struct wps_registrar_device *prev;
 195
 196         while (dev) {
 197                 prev = dev;
 198                 dev = dev->next;
 199                 wps_device_data_free(&prev->dev);
 200                 os_free(prev);
 201         }
 202 }
 203
 204
 205 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
 206                                                     const u8 *addr)
 207 {
 208         struct wps_registrar_device *dev;
 209
 210         for (dev = reg->devices; dev; dev = dev->next) {
 211                 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
 212                         return dev;
 213         }
 214         return NULL;
 215 }
 216
 217
 218 static void wps_device_clone_data(struct wps_device_data *dst,
 219                                   struct wps_device_data *src)
 220 {
 221         os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
 222         os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
 223
 224 #define WPS_STRDUP(n) \
 225         os_free(dst->n); \
 226         dst->n = src->n ? os_strdup(src->n) : NULL
 227
 228         WPS_STRDUP(device_name);
 229         WPS_STRDUP(manufacturer);
 230         WPS_STRDUP(model_name);
 231         WPS_STRDUP(model_number);
 232         WPS_STRDUP(serial_number);
 233 #undef WPS_STRDUP
 234 }
 235
 236
 237 int wps_device_store(struct wps_registrar *reg,
 238                      struct wps_device_data *dev, const u8 *uuid)
 239 {
 240         struct wps_registrar_device *d;
 241
 242         d = wps_device_get(reg, dev->mac_addr);
 243         if (d == NULL) {
 244                 d = os_zalloc(sizeof(*d));
 245                 if (d == NULL)
 246                         return -1;
 247                 d->next = reg->devices;
 248                 reg->devices = d;
 249         }
 250
 251         wps_device_clone_data(&d->dev, dev);
 252         os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
 253
 254         return 0;
 255 }
 256
 257
 258 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
 259                                           const u8 *addr, const u8 *uuid_e)
 260 {
 261         struct wps_pbc_session *pbc, *prev = NULL;
 262         struct os_time now;
 263
 264         os_get_time(&now);
 265
 266         pbc = reg->pbc_sessions;
 267         while (pbc) {
 268                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 269                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 270                         if (prev)
 271                                 prev->next = pbc->next;
 272                         else
 273                                 reg->pbc_sessions = pbc->next;
 274                         break;
 275                 }
 276                 prev = pbc;
 277                 pbc = pbc->next;
 278         }
 279
 280         if (!pbc) {
 281                 pbc = os_zalloc(sizeof(*pbc));
 282                 if (pbc == NULL)
 283                         return;
 284                 os_memcpy(pbc->addr, addr, ETH_ALEN);
 285                 if (uuid_e)
 286                         os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
 287         }
 288
 289         pbc->next = reg->pbc_sessions;
 290         reg->pbc_sessions = pbc;
 291         pbc->timestamp = now;
 292
 293         /* remove entries that have timed out */
 294         prev = pbc;
 295         pbc = pbc->next;
 296
 297         while (pbc) {
 298                 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
 299                         prev->next = NULL;
 300                         wps_free_pbc_sessions(pbc);
 301                         break;
 302                 }
 303                 prev = pbc;
 304                 pbc = pbc->next;
 305         }
 306 }
 307
 308
 309 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
 310                                              const u8 *addr, const u8 *uuid_e)
 311 {
 312         struct wps_pbc_session *pbc, *prev = NULL;
 313
 314         pbc = reg->pbc_sessions;
 315         while (pbc) {
 316                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 317                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 318                         if (prev)
 319                                 prev->next = pbc->next;
 320                         else
 321                                 reg->pbc_sessions = pbc->next;
 322                         os_free(pbc);
 323                         break;
 324                 }
 325                 prev = pbc;
 326                 pbc = pbc->next;
 327         }
 328 }
 329
 330
 331 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
 332                               const u8 *addr, const u8 *uuid_e)
 333 {
 334         int count = 0;
 335         struct wps_pbc_session *pbc;
 336         struct os_time now;
 337
 338         os_get_time(&now);
 339
 340         for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
 341                 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME)
 342                         break;
 343                 if (addr == NULL || os_memcmp(addr, pbc->addr, ETH_ALEN) ||
 344                     uuid_e == NULL ||
 345                     os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN))
 346                         count++;
 347         }
 348
 349         if (addr || uuid_e)
 350                 count++;
 351
 352         return count > 1 ? 1 : 0;
 353 }
 354
 355
 356 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
 357 {
 358         wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
 359                    wps->wps_state);
 360         wpabuf_put_be16(msg, ATTR_WPS_STATE);
 361         wpabuf_put_be16(msg, 1);
 362         wpabuf_put_u8(msg, wps->wps_state);
 363         return 0;
 364 }
 365
 366
 367 #ifdef CONFIG_WPS_UPNP
 368 static void wps_registrar_free_pending_m2(struct wps_context *wps)
 369 {
 370         struct upnp_pending_message *p, *p2, *prev = NULL;
 371         p = wps->upnp_msgs;
 372         while (p) {
 373                 if (p->type == WPS_M2 || p->type == WPS_M2D) {
 374                         if (prev == NULL)
 375                                 wps->upnp_msgs = p->next;
 376                         else
 377                                 prev->next = p->next;
 378                         wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
 379                         p2 = p;
 380                         p = p->next;
 381                         wpabuf_free(p2->msg);
 382                         os_free(p2);
 383                         continue;
 384                 }
 385                 prev = p;
 386                 p = p->next;
 387         }
 388 }
 389 #endif /* CONFIG_WPS_UPNP */
 390
 391
 392 static int wps_build_ap_setup_locked(struct wps_context *wps,
 393                                      struct wpabuf *msg)
 394 {
 395         if (wps->ap_setup_locked) {
 396                 wpa_printf(MSG_DEBUG, "WPS:  * AP Setup Locked");
 397                 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
 398                 wpabuf_put_be16(msg, 1);
 399                 wpabuf_put_u8(msg, 1);
 400         }
 401         return 0;
 402 }
 403
 404
 405 static int wps_build_selected_registrar(struct wps_registrar *reg,
 406                                         struct wpabuf *msg)
 407 {
 408         if (!reg->sel_reg_union)
 409                 return 0;
 410         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar");
 411         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
 412         wpabuf_put_be16(msg, 1);
 413         wpabuf_put_u8(msg, 1);
 414         return 0;
 415 }
 416
 417
 418 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
 419                                              struct wpabuf *msg)
 420 {
 421         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 422         if (!reg->sel_reg_union)
 423                 return 0;
 424         if (reg->sel_reg_dev_password_id_override >= 0)
 425                 id = reg->sel_reg_dev_password_id_override;
 426         wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
 427         wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
 428         wpabuf_put_be16(msg, 2);
 429         wpabuf_put_be16(msg, id);
 430         return 0;
 431 }
 432
 433
 434 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
 435                                         struct wpabuf *msg)
 436 {
 437         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 438         if (!reg->sel_reg_union)
 439                 return 0;
 440         if (reg->sel_reg_dev_password_id_override >= 0)
 441                 id = reg->sel_reg_dev_password_id_override;
 442         if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
 443                 return 0;
 444         return wps_build_uuid_e(msg, reg->wps->uuid);
 445 }
 446
 447
 448 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
 449 {
 450         *methods |= WPS_CONFIG_PUSHBUTTON;
 451 #ifdef CONFIG_WPS2
 452         if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON)
 453                 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
 454         if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON)
 455                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 456         if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
 457             WPS_CONFIG_VIRT_PUSHBUTTON ||
 458             (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
 459             WPS_CONFIG_PHY_PUSHBUTTON) {
 460                 /*
 461                  * Required to include virtual/physical flag, but we were not
 462                  * configured with push button type, so have to default to one
 463                  * of them.
 464                  */
 465                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 466         }
 467 #endif /* CONFIG_WPS2 */
 468 }
 469
 470
 471 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
 472                                             struct wpabuf *msg)
 473 {
 474         u16 methods;
 475         if (!reg->sel_reg_union)
 476                 return 0;
 477         methods = reg->wps->config_methods;
 478         methods &= ~WPS_CONFIG_PUSHBUTTON;
 479 #ifdef CONFIG_WPS2
 480         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 481                      WPS_CONFIG_PHY_PUSHBUTTON);
 482 #endif /* CONFIG_WPS2 */
 483         if (reg->pbc)
 484                 wps_set_pushbutton(&methods, reg->wps->config_methods);
 485         if (reg->sel_reg_config_methods_override >= 0)
 486                 methods = reg->sel_reg_config_methods_override;
 487         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar Config Methods (%x)",
 488                    methods);
 489         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
 490         wpabuf_put_be16(msg, 2);
 491         wpabuf_put_be16(msg, methods);
 492         return 0;
 493 }
 494
 495
 496 static int wps_build_probe_config_methods(struct wps_registrar *reg,
 497                                           struct wpabuf *msg)
 498 {
 499         u16 methods;
 500         /*
 501          * These are the methods that the AP supports as an Enrollee for adding
 502          * external Registrars.
 503          */
 504         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 505 #ifdef CONFIG_WPS2
 506         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 507                      WPS_CONFIG_PHY_PUSHBUTTON);
 508 #endif /* CONFIG_WPS2 */
 509         wpa_printf(MSG_DEBUG, "WPS:  * Config Methods (%x)", methods);
 510         wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
 511         wpabuf_put_be16(msg, 2);
 512         wpabuf_put_be16(msg, methods);
 513         return 0;
 514 }
 515
 516
 517 static int wps_build_config_methods_r(struct wps_registrar *reg,
 518                                       struct wpabuf *msg)
 519 {
 520         u16 methods;
 521         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 522 #ifdef CONFIG_WPS2
 523         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 524                      WPS_CONFIG_PHY_PUSHBUTTON);
 525 #endif /* CONFIG_WPS2 */
 526         if (reg->pbc)
 527                 wps_set_pushbutton(&methods, reg->wps->config_methods);
 528         return wps_build_config_methods(msg, methods);
 529 }
 530
 531
 532 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
 533 {
 534         *count = 0;
 535
 536 #ifdef CONFIG_WPS2
 537         while (*count < WPS_MAX_AUTHORIZED_MACS) {
 538                 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
 539                         break;
 540                 (*count)++;
 541         }
 542 #endif /* CONFIG_WPS2 */
 543
 544         return (const u8 *) reg->authorized_macs_union;
 545 }
 546
 547
 548 /**
 549  * wps_registrar_init - Initialize WPS Registrar data
 550  * @wps: Pointer to longterm WPS context
 551  * @cfg: Registrar configuration
 552  * Returns: Pointer to allocated Registrar data or %NULL on failure
 553  *
 554  * This function is used to initialize WPS Registrar functionality. It can be
 555  * used for a single Registrar run (e.g., when run in a supplicant) or multiple
 556  * runs (e.g., when run as an internal Registrar in an AP). Caller is
 557  * responsible for freeing the returned data with wps_registrar_deinit() when
 558  * Registrar functionality is not needed anymore.
 559  */
 560 struct wps_registrar *
 561 wps_registrar_init(struct wps_context *wps,
 562                    const struct wps_registrar_config *cfg)
 563 {
 564         struct wps_registrar *reg = os_zalloc(sizeof(*reg));
 565         if (reg == NULL)
 566                 return NULL;
 567
 568         dl_list_init(&reg->pins);
 569         reg->wps = wps;
 570         reg->new_psk_cb = cfg->new_psk_cb;
 571         reg->set_ie_cb = cfg->set_ie_cb;
 572         reg->pin_needed_cb = cfg->pin_needed_cb;
 573         reg->reg_success_cb = cfg->reg_success_cb;
 574         reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
 575         reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
 576         reg->cb_ctx = cfg->cb_ctx;
 577         reg->skip_cred_build = cfg->skip_cred_build;
 578         if (cfg->extra_cred) {
 579                 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
 580                                                     cfg->extra_cred_len);
 581                 if (reg->extra_cred == NULL) {
 582                         os_free(reg);
 583                         return NULL;
 584                 }
 585         }
 586         reg->disable_auto_conf = cfg->disable_auto_conf;
 587         reg->sel_reg_dev_password_id_override = -1;
 588         reg->sel_reg_config_methods_override = -1;
 589         reg->static_wep_only = cfg->static_wep_only;
 590         reg->dualband = cfg->dualband;
 591
 592         if (wps_set_ie(reg)) {
 593                 wps_registrar_deinit(reg);
 594                 return NULL;
 595         }
 596
 597         return reg;
 598 }
 599
 600
 601 /**
 602  * wps_registrar_deinit - Deinitialize WPS Registrar data
 603  * @reg: Registrar data from wps_registrar_init()
 604  */
 605 void wps_registrar_deinit(struct wps_registrar *reg)
 606 {
 607         if (reg == NULL)
 608                 return;
 609         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 610         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 611         wps_free_pins(&reg->pins);
 612         wps_free_pbc_sessions(reg->pbc_sessions);
 613         wpabuf_free(reg->extra_cred);
 614         wps_free_devices(reg->devices);
 615         os_free(reg);
 616 }
 617
 618
 619 /**
 620  * wps_registrar_add_pin - Configure a new PIN for Registrar
 621  * @reg: Registrar data from wps_registrar_init()
 622  * @addr: Enrollee MAC address or %NULL if not known
 623  * @uuid: UUID-E or %NULL for wildcard (any UUID)
 624  * @pin: PIN (Device Password)
 625  * @pin_len: Length of pin in octets
 626  * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
 627  * Returns: 0 on success, -1 on failure
 628  */
 629 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
 630                           const u8 *uuid, const u8 *pin, size_t pin_len,
 631                           int timeout)
 632 {
 633         struct wps_uuid_pin *p;
 634
 635         p = os_zalloc(sizeof(*p));
 636         if (p == NULL)
 637                 return -1;
 638         if (addr)
 639                 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
 640         if (uuid == NULL)
 641                 p->wildcard_uuid = 1;
 642         else
 643                 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
 644         p->pin = os_malloc(pin_len);
 645         if (p->pin == NULL) {
 646                 os_free(p);
 647                 return -1;
 648         }
 649         os_memcpy(p->pin, pin, pin_len);
 650         p->pin_len = pin_len;
 651
 652         if (timeout) {
 653                 p->flags |= PIN_EXPIRES;
 654                 os_get_time(&p->expiration);
 655                 p->expiration.sec += timeout;
 656         }
 657
 658         dl_list_add(&reg->pins, &p->list);
 659
 660         wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
 661                    timeout);
 662         wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
 663         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
 664         reg->selected_registrar = 1;
 665         reg->pbc = 0;
 666         if (addr)
 667                 wps_registrar_add_authorized_mac(reg, addr);
 668         else
 669                 wps_registrar_add_authorized_mac(
 670                         reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
 671         wps_registrar_selected_registrar_changed(reg);
 672         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 673         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
 674                                wps_registrar_set_selected_timeout,
 675                                reg, NULL);
 676
 677         return 0;
 678 }
 679
 680
 681 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 682                                      struct wps_uuid_pin *pin)
 683 {
 684         u8 *addr;
 685         u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 686
 687         if (is_zero_ether_addr(pin->enrollee_addr))
 688                 addr = bcast;
 689         else
 690                 addr = pin->enrollee_addr;
 691         wps_registrar_remove_authorized_mac(reg, addr);
 692         wps_remove_pin(pin);
 693         wps_registrar_selected_registrar_changed(reg);
 694 }
 695
 696
 697 static void wps_registrar_expire_pins(struct wps_registrar *reg)
 698 {
 699         struct wps_uuid_pin *pin, *prev;
 700         struct os_time now;
 701
 702         os_get_time(&now);
 703         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 704         {
 705                 if ((pin->flags & PIN_EXPIRES) &&
 706                     os_time_before(&pin->expiration, &now)) {
 707                         wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
 708                                     pin->uuid, WPS_UUID_LEN);
 709                         wps_registrar_remove_pin(reg, pin);
 710                 }
 711         }
 712 }
 713
 714
 715 /**
 716  * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
 717  * @reg: Registrar data from wps_registrar_init()
 718  * Returns: 0 on success, -1 if not wildcard PIN is enabled
 719  */
 720 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg)
 721 {
 722         struct wps_uuid_pin *pin, *prev;
 723
 724         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 725         {
 726                 if (pin->wildcard_uuid) {
 727                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 728                                     pin->uuid, WPS_UUID_LEN);
 729                         wps_registrar_remove_pin(reg, pin);
 730                         return 0;
 731                 }
 732         }
 733
 734         return -1;
 735 }
 736
 737
 738 /**
 739  * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
 740  * @reg: Registrar data from wps_registrar_init()
 741  * @uuid: UUID-E
 742  * Returns: 0 on success, -1 on failure (e.g., PIN not found)
 743  */
 744 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
 745 {
 746         struct wps_uuid_pin *pin, *prev;
 747
 748         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 749         {
 750                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 751                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 752                                     pin->uuid, WPS_UUID_LEN);
 753                         wps_registrar_remove_pin(reg, pin);
 754                         return 0;
 755                 }
 756         }
 757
 758         return -1;
 759 }
 760
 761
 762 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
 763                                         const u8 *uuid, size_t *pin_len)
 764 {
 765         struct wps_uuid_pin *pin, *found = NULL;
 766
 767         wps_registrar_expire_pins(reg);
 768
 769         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 770                 if (!pin->wildcard_uuid &&
 771                     os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 772                         found = pin;
 773                         break;
 774                 }
 775         }
 776
 777         if (!found) {
 778                 /* Check for wildcard UUIDs since none of the UUID-specific
 779                  * PINs matched */
 780                 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 781                         if (pin->wildcard_uuid == 1) {
 782                                 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
 783                                            "PIN. Assigned it for this UUID-E");
 784                                 pin->wildcard_uuid = 2;
 785                                 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
 786                                 found = pin;
 787                                 break;
 788                         }
 789                 }
 790         }
 791
 792         if (!found)
 793                 return NULL;
 794
 795         /*
 796          * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
 797          * that could otherwise avoid PIN invalidations.
 798          */
 799         if (found->flags & PIN_LOCKED) {
 800                 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
 801                            "allow concurrent re-use");
 802                 return NULL;
 803         }
 804         *pin_len = found->pin_len;
 805         found->flags |= PIN_LOCKED;
 806         return found->pin;
 807 }
 808
 809
 810 /**
 811  * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
 812  * @reg: Registrar data from wps_registrar_init()
 813  * @uuid: UUID-E
 814  * Returns: 0 on success, -1 on failure
 815  *
 816  * PINs are locked to enforce only one concurrent use. This function unlocks a
 817  * PIN to allow it to be used again. If the specified PIN was configured using
 818  * a wildcard UUID, it will be removed instead of allowing multiple uses.
 819  */
 820 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
 821 {
 822         struct wps_uuid_pin *pin;
 823
 824         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 825                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 826                         if (pin->wildcard_uuid == 2) {
 827                                 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
 828                                            "wildcard PIN");
 829                                 return wps_registrar_invalidate_pin(reg, uuid);
 830                         }
 831                         pin->flags &= ~PIN_LOCKED;
 832                         return 0;
 833                 }
 834         }
 835
 836         return -1;
 837 }
 838
 839
 840 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
 841 {
 842         reg->selected_registrar = 0;
 843         reg->pbc = 0;
 844         wps_registrar_selected_registrar_changed(reg);
 845 }
 846
 847
 848 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
 849 {
 850         struct wps_registrar *reg = eloop_ctx;
 851
 852         wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
 853         wps_pbc_timeout_event(reg->wps);
 854         wps_registrar_stop_pbc(reg);
 855 }
 856
 857
 858 /**
 859  * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
 860  * @reg: Registrar data from wps_registrar_init()
 861  * Returns: 0 on success, -1 on failure
 862  *
 863  * This function is called on an AP when a push button is pushed to activate
 864  * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
 865  * or when a PBC registration is completed.
 866  */
 867 int wps_registrar_button_pushed(struct wps_registrar *reg)
 868 {
 869         if (wps_registrar_pbc_overlap(reg, NULL, NULL)) {
 870                 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
 871                            "mode");
 872                 wps_pbc_overlap_event(reg->wps);
 873                 return -1;
 874         }
 875         wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
 876         reg->force_pbc_overlap = 0;
 877         reg->selected_registrar = 1;
 878         reg->pbc = 1;
 879         wps_registrar_selected_registrar_changed(reg);
 880
 881         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 882         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 883         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
 884                                reg, NULL);
 885         return 0;
 886 }
 887
 888
 889 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
 890 {
 891         wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
 892         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 893         wps_registrar_stop_pbc(reg);
 894 }
 895
 896
 897 static void wps_registrar_pin_completed(struct wps_registrar *reg)
 898 {
 899         wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
 900         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 901         reg->selected_registrar = 0;
 902         wps_registrar_selected_registrar_changed(reg);
 903 }
 904
 905
 906 int wps_registrar_wps_cancel(struct wps_registrar *reg)
 907 {
 908         if (reg->pbc) {
 909                 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
 910                 wps_registrar_pbc_timeout(reg, NULL);
 911                 return 1;
 912         } else if (reg->selected_registrar) {
 913                 /* PIN Method */
 914                 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
 915                 wps_registrar_pin_completed(reg);
 916                 wps_registrar_invalidate_wildcard_pin(reg);
 917                 return 1;
 918         }
 919         return 0;
 920 }
 921
 922
 923 /**
 924  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
 925  * @reg: Registrar data from wps_registrar_init()
 926  * @addr: MAC address of the Probe Request sender
 927  * @wps_data: WPS IE contents
 928  *
 929  * This function is called on an AP when a Probe Request with WPS IE is
 930  * received. This is used to track PBC mode use and to detect possible overlap
 931  * situation with other WPS APs.
 932  */
 933 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
 934                                 const struct wpabuf *wps_data,
 935                                 int p2p_wildcard)
 936 {
 937         struct wps_parse_attr attr;
 938
 939         wpa_hexdump_buf(MSG_MSGDUMP,
 940                         "WPS: Probe Request with WPS data received",
 941                         wps_data);
 942
 943         if (wps_parse_msg(wps_data, &attr) < 0)
 944                 return;
 945
 946         if (attr.config_methods == NULL) {
 947                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
 948                            "Probe Request");
 949                 return;
 950         }
 951
 952         if (attr.dev_password_id == NULL) {
 953                 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
 954                            "in Probe Request");
 955                 return;
 956         }
 957
 958         if (reg->enrollee_seen_cb && attr.uuid_e &&
 959             attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
 960                 char *dev_name = NULL;
 961                 if (attr.dev_name) {
 962                         dev_name = os_zalloc(attr.dev_name_len + 1);
 963                         if (dev_name) {
 964                                 os_memcpy(dev_name, attr.dev_name,
 965                                           attr.dev_name_len);
 966                         }
 967                 }
 968                 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
 969                                       attr.primary_dev_type,
 970                                       WPA_GET_BE16(attr.config_methods),
 971                                       WPA_GET_BE16(attr.dev_password_id),
 972                                       *attr.request_type, dev_name);
 973                 os_free(dev_name);
 974         }
 975
 976         if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
 977                 return; /* Not PBC */
 978
 979         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
 980                    MACSTR, MAC2STR(addr));
 981         if (attr.uuid_e == NULL) {
 982                 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
 983                            "UUID-E included");
 984                 return;
 985         }
 986
 987         wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
 988         if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
 989                 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
 990                 reg->force_pbc_overlap = 1;
 991                 wps_pbc_overlap_event(reg->wps);
 992         }
 993 }
 994
 995
 996 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
 997                           const u8 *psk, size_t psk_len)
 998 {
 999         if (reg->new_psk_cb == NULL)
1000                 return 0;
1001
1002         return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1003 }
1004
1005
1006 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1007                               const struct wps_device_data *dev)
1008 {
1009         if (reg->pin_needed_cb == NULL)
1010                 return;
1011
1012         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1013 }
1014
1015
1016 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1017                                const u8 *uuid_e)
1018 {
1019         if (reg->reg_success_cb == NULL)
1020                 return;
1021
1022         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
1023 }
1024
1025
1026 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1027                          struct wpabuf *probe_resp_ie)
1028 {
1029         return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1030 }
1031
1032
1033 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1034 {
1035         u16 methods = 0;
1036         if (reg->set_sel_reg_cb == NULL)
1037                 return;
1038
1039         if (reg->selected_registrar) {
1040                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1041 #ifdef CONFIG_WPS2
1042                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1043                              WPS_CONFIG_PHY_PUSHBUTTON);
1044 #endif /* CONFIG_WPS2 */
1045                 if (reg->pbc)
1046                         wps_set_pushbutton(&methods, reg->wps->config_methods);
1047         }
1048
1049         wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1050                    "config_methods=0x%x pbc=%d methods=0x%x",
1051                    reg->selected_registrar, reg->wps->config_methods,
1052                    reg->pbc, methods);
1053
1054         reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1055                             reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1056                             methods);
1057 }
1058
1059
1060 static int wps_set_ie(struct wps_registrar *reg)
1061 {
1062         struct wpabuf *beacon;
1063         struct wpabuf *probe;
1064         const u8 *auth_macs;
1065         size_t count;
1066
1067         if (reg->set_ie_cb == NULL)
1068                 return 0;
1069
1070         beacon = wpabuf_alloc(400);
1071         if (beacon == NULL)
1072                 return -1;
1073         probe = wpabuf_alloc(500);
1074         if (probe == NULL) {
1075                 wpabuf_free(beacon);
1076                 return -1;
1077         }
1078
1079         auth_macs = wps_authorized_macs(reg, &count);
1080
1081         wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1082
1083         if (wps_build_version(beacon) ||
1084             wps_build_wps_state(reg->wps, beacon) ||
1085             wps_build_ap_setup_locked(reg->wps, beacon) ||
1086             wps_build_selected_registrar(reg, beacon) ||
1087             wps_build_sel_reg_dev_password_id(reg, beacon) ||
1088             wps_build_sel_reg_config_methods(reg, beacon) ||
1089             wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1090             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1091             wps_build_wfa_ext(beacon, 0, auth_macs, count)) {
1092                 wpabuf_free(beacon);
1093                 wpabuf_free(probe);
1094                 return -1;
1095         }
1096
1097         wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1098
1099         if (wps_build_version(probe) ||
1100             wps_build_wps_state(reg->wps, probe) ||
1101             wps_build_ap_setup_locked(reg->wps, probe) ||
1102             wps_build_selected_registrar(reg, probe) ||
1103             wps_build_sel_reg_dev_password_id(reg, probe) ||
1104             wps_build_sel_reg_config_methods(reg, probe) ||
1105             wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1106                                 WPS_RESP_REGISTRAR) ||
1107             wps_build_uuid_e(probe, reg->wps->uuid) ||
1108             wps_build_device_attrs(&reg->wps->dev, probe) ||
1109             wps_build_probe_config_methods(reg, probe) ||
1110             wps_build_rf_bands(&reg->wps->dev, probe) ||
1111             wps_build_wfa_ext(probe, 0, auth_macs, count)) {
1112                 wpabuf_free(beacon);
1113                 wpabuf_free(probe);
1114                 return -1;
1115         }
1116
1117 #ifdef CONFIG_P2P
1118         if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1119             wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1120                 wpabuf_free(beacon);
1121                 wpabuf_free(probe);
1122                 return -1;
1123         }
1124 #endif /* CONFIG_P2P */
1125
1126         beacon = wps_ie_encapsulate(beacon);
1127         probe = wps_ie_encapsulate(probe);
1128
1129         if (!beacon || !probe) {
1130                 wpabuf_free(beacon);
1131                 wpabuf_free(probe);
1132                 return -1;
1133         }
1134
1135         if (reg->static_wep_only) {
1136                 /*
1137                  * Windows XP and Vista clients can get confused about
1138                  * EAP-Identity/Request when they probe the network with
1139                  * EAPOL-Start. In such a case, they may assume the network is
1140                  * using IEEE 802.1X and prompt user for a certificate while
1141                  * the correct (non-WPS) behavior would be to ask for the
1142                  * static WEP key. As a workaround, use Microsoft Provisioning
1143                  * IE to advertise that legacy 802.1X is not supported.
1144                  */
1145                 const u8 ms_wps[7] = {
1146                         WLAN_EID_VENDOR_SPECIFIC, 5,
1147                         /* Microsoft Provisioning IE (00:50:f2:5) */
1148                         0x00, 0x50, 0xf2, 5,
1149                         0x00 /* no legacy 802.1X or MS WPS */
1150                 };
1151                 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1152                            "into Beacon/Probe Response frames");
1153                 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1154                 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1155         }
1156
1157         return wps_cb_set_ie(reg, beacon, probe);
1158 }
1159
1160
1161 static int wps_get_dev_password(struct wps_data *wps)
1162 {
1163         const u8 *pin;
1164         size_t pin_len = 0;
1165
1166         os_free(wps->dev_password);
1167         wps->dev_password = NULL;
1168
1169         if (wps->pbc) {
1170                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1171                 pin = (const u8 *) "00000000";
1172                 pin_len = 8;
1173         } else {
1174                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1175                                             &pin_len);
1176         }
1177         if (pin == NULL) {
1178                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1179                            "the Enrollee");
1180                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1181                                   &wps->peer_dev);
1182                 return -1;
1183         }
1184
1185         wps->dev_password = os_malloc(pin_len);
1186         if (wps->dev_password == NULL)
1187                 return -1;
1188         os_memcpy(wps->dev_password, pin, pin_len);
1189         wps->dev_password_len = pin_len;
1190
1191         return 0;
1192 }
1193
1194
1195 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1196 {
1197         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1198         wpabuf_put_be16(msg, ATTR_UUID_R);
1199         wpabuf_put_be16(msg, WPS_UUID_LEN);
1200         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1201         return 0;
1202 }
1203
1204
1205 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1206 {
1207         u8 *hash;
1208         const u8 *addr[4];
1209         size_t len[4];
1210
1211         if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1212                 return -1;
1213         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1214         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1215                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1216
1217         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1218                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1219                            "R-Hash derivation");
1220                 return -1;
1221         }
1222
1223         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1224         wpabuf_put_be16(msg, ATTR_R_HASH1);
1225         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1226         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1227         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1228         addr[0] = wps->snonce;
1229         len[0] = WPS_SECRET_NONCE_LEN;
1230         addr[1] = wps->psk1;
1231         len[1] = WPS_PSK_LEN;
1232         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1233         len[2] = wpabuf_len(wps->dh_pubkey_e);
1234         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1235         len[3] = wpabuf_len(wps->dh_pubkey_r);
1236         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1237         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1238
1239         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1240         wpabuf_put_be16(msg, ATTR_R_HASH2);
1241         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1242         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1243         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1244         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1245         addr[1] = wps->psk2;
1246         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1247         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1248
1249         return 0;
1250 }
1251
1252
1253 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1254 {
1255         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1256         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1257         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1258         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1259         return 0;
1260 }
1261
1262
1263 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1264 {
1265         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1266         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1267         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1268         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1269                         WPS_SECRET_NONCE_LEN);
1270         return 0;
1271 }
1272
1273
1274 static int wps_build_cred_network_idx(struct wpabuf *msg,
1275                                       const struct wps_credential *cred)
1276 {
1277         wpa_printf(MSG_DEBUG, "WPS:  * Network Index (1)");
1278         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1279         wpabuf_put_be16(msg, 1);
1280         wpabuf_put_u8(msg, 1);
1281         return 0;
1282 }
1283
1284
1285 static int wps_build_cred_ssid(struct wpabuf *msg,
1286                                const struct wps_credential *cred)
1287 {
1288         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1289         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1290                           cred->ssid, cred->ssid_len);
1291         wpabuf_put_be16(msg, ATTR_SSID);
1292         wpabuf_put_be16(msg, cred->ssid_len);
1293         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1294         return 0;
1295 }
1296
1297
1298 static int wps_build_cred_auth_type(struct wpabuf *msg,
1299                                     const struct wps_credential *cred)
1300 {
1301         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1302                    cred->auth_type);
1303         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1304         wpabuf_put_be16(msg, 2);
1305         wpabuf_put_be16(msg, cred->auth_type);
1306         return 0;
1307 }
1308
1309
1310 static int wps_build_cred_encr_type(struct wpabuf *msg,
1311                                     const struct wps_credential *cred)
1312 {
1313         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1314                    cred->encr_type);
1315         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1316         wpabuf_put_be16(msg, 2);
1317         wpabuf_put_be16(msg, cred->encr_type);
1318         return 0;
1319 }
1320
1321
1322 static int wps_build_cred_network_key(struct wpabuf *msg,
1323                                       const struct wps_credential *cred)
1324 {
1325         wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1326                    (int) cred->key_len);
1327         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1328                         cred->key, cred->key_len);
1329         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1330         wpabuf_put_be16(msg, cred->key_len);
1331         wpabuf_put_data(msg, cred->key, cred->key_len);
1332         return 0;
1333 }
1334
1335
1336 static int wps_build_cred_mac_addr(struct wpabuf *msg,
1337                                    const struct wps_credential *cred)
1338 {
1339         wpa_printf(MSG_DEBUG, "WPS:  * MAC Address (" MACSTR ")",
1340                    MAC2STR(cred->mac_addr));
1341         wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1342         wpabuf_put_be16(msg, ETH_ALEN);
1343         wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1344         return 0;
1345 }
1346
1347
1348 static int wps_build_credential(struct wpabuf *msg,
1349                                 const struct wps_credential *cred)
1350 {
1351         if (wps_build_cred_network_idx(msg, cred) ||
1352             wps_build_cred_ssid(msg, cred) ||
1353             wps_build_cred_auth_type(msg, cred) ||
1354             wps_build_cred_encr_type(msg, cred) ||
1355             wps_build_cred_network_key(msg, cred) ||
1356             wps_build_cred_mac_addr(msg, cred))
1357                 return -1;
1358         return 0;
1359 }
1360
1361
1362 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1363 {
1364         struct wpabuf *cred;
1365
1366         if (wps->wps->registrar->skip_cred_build)
1367                 goto skip_cred_build;
1368
1369         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1370         if (wps->use_cred) {
1371                 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1372                 goto use_provided;
1373         }
1374         os_memset(&wps->cred, 0, sizeof(wps->cred));
1375
1376         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1377         wps->cred.ssid_len = wps->wps->ssid_len;
1378
1379         /* Select the best authentication and encryption type */
1380         if (wps->auth_type & WPS_AUTH_WPA2PSK)
1381                 wps->auth_type = WPS_AUTH_WPA2PSK;
1382         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1383                 wps->auth_type = WPS_AUTH_WPAPSK;
1384         else if (wps->auth_type & WPS_AUTH_OPEN)
1385                 wps->auth_type = WPS_AUTH_OPEN;
1386         else if (wps->auth_type & WPS_AUTH_SHARED)
1387                 wps->auth_type = WPS_AUTH_SHARED;
1388         else {
1389                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1390                            wps->auth_type);
1391                 return -1;
1392         }
1393         wps->cred.auth_type = wps->auth_type;
1394
1395         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1396             wps->auth_type == WPS_AUTH_WPAPSK) {
1397                 if (wps->encr_type & WPS_ENCR_AES)
1398                         wps->encr_type = WPS_ENCR_AES;
1399                 else if (wps->encr_type & WPS_ENCR_TKIP)
1400                         wps->encr_type = WPS_ENCR_TKIP;
1401                 else {
1402                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1403                                    "type for WPA/WPA2");
1404                         return -1;
1405                 }
1406         } else {
1407                 if (wps->encr_type & WPS_ENCR_WEP)
1408                         wps->encr_type = WPS_ENCR_WEP;
1409                 else if (wps->encr_type & WPS_ENCR_NONE)
1410                         wps->encr_type = WPS_ENCR_NONE;
1411                 else {
1412                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1413                                    "type for non-WPA/WPA2 mode");
1414                         return -1;
1415                 }
1416         }
1417         wps->cred.encr_type = wps->encr_type;
1418         /*
1419          * Set MAC address in the Credential to be the Enrollee's MAC address
1420          */
1421         os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1422
1423         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1424             !wps->wps->registrar->disable_auto_conf) {
1425                 u8 r[16];
1426                 /* Generate a random passphrase */
1427                 if (os_get_random(r, sizeof(r)) < 0)
1428                         return -1;
1429                 os_free(wps->new_psk);
1430                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1431                 if (wps->new_psk == NULL)
1432                         return -1;
1433                 wps->new_psk_len--; /* remove newline */
1434                 while (wps->new_psk_len &&
1435                        wps->new_psk[wps->new_psk_len - 1] == '=')
1436                         wps->new_psk_len--;
1437                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1438                                       wps->new_psk, wps->new_psk_len);
1439                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1440                 wps->cred.key_len = wps->new_psk_len;
1441         } else if (wps->use_psk_key && wps->wps->psk_set) {
1442                 char hex[65];
1443                 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1444                 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1445                 os_memcpy(wps->cred.key, hex, 32 * 2);
1446                 wps->cred.key_len = 32 * 2;
1447         } else if (wps->wps->network_key) {
1448                 os_memcpy(wps->cred.key, wps->wps->network_key,
1449                           wps->wps->network_key_len);
1450                 wps->cred.key_len = wps->wps->network_key_len;
1451         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1452                 char hex[65];
1453                 /* Generate a random per-device PSK */
1454                 os_free(wps->new_psk);
1455                 wps->new_psk_len = 32;
1456                 wps->new_psk = os_malloc(wps->new_psk_len);
1457                 if (wps->new_psk == NULL)
1458                         return -1;
1459                 if (os_get_random(wps->new_psk, wps->new_psk_len) < 0) {
1460                         os_free(wps->new_psk);
1461                         wps->new_psk = NULL;
1462                         return -1;
1463                 }
1464                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1465                                 wps->new_psk, wps->new_psk_len);
1466                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1467                                  wps->new_psk_len);
1468                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1469                 wps->cred.key_len = wps->new_psk_len * 2;
1470         }
1471
1472 use_provided:
1473 #ifdef CONFIG_WPS_TESTING
1474         if (wps_testing_dummy_cred)
1475                 cred = wpabuf_alloc(200);
1476         else
1477                 cred = NULL;
1478         if (cred) {
1479                 struct wps_credential dummy;
1480                 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1481                 os_memset(&dummy, 0, sizeof(dummy));
1482                 os_memcpy(dummy.ssid, "dummy", 5);
1483                 dummy.ssid_len = 5;
1484                 dummy.auth_type = WPS_AUTH_WPA2PSK;
1485                 dummy.encr_type = WPS_ENCR_AES;
1486                 os_memcpy(dummy.key, "dummy psk", 9);
1487                 dummy.key_len = 9;
1488                 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1489                 wps_build_credential(cred, &dummy);
1490                 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1491
1492                 wpabuf_put_be16(msg, ATTR_CRED);
1493                 wpabuf_put_be16(msg, wpabuf_len(cred));
1494                 wpabuf_put_buf(msg, cred);
1495
1496                 wpabuf_free(cred);
1497         }
1498 #endif /* CONFIG_WPS_TESTING */
1499
1500         cred = wpabuf_alloc(200);
1501         if (cred == NULL)
1502                 return -1;
1503
1504         if (wps_build_credential(cred, &wps->cred)) {
1505                 wpabuf_free(cred);
1506                 return -1;
1507         }
1508
1509         wpabuf_put_be16(msg, ATTR_CRED);
1510         wpabuf_put_be16(msg, wpabuf_len(cred));
1511         wpabuf_put_buf(msg, cred);
1512         wpabuf_free(cred);
1513
1514 skip_cred_build:
1515         if (wps->wps->registrar->extra_cred) {
1516                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1517                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1518         }
1519
1520         return 0;
1521 }
1522
1523
1524 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1525 {
1526         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1527
1528         if (wps_build_credential(msg, &wps->cred))
1529                 return -1;
1530
1531         return 0;
1532 }
1533
1534
1535 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1536 {
1537         struct wpabuf *msg;
1538
1539         if (os_get_random(wps->nonce_r, WPS_NONCE_LEN) < 0)
1540                 return NULL;
1541         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1542                     wps->nonce_r, WPS_NONCE_LEN);
1543         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1544
1545         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1546         msg = wpabuf_alloc(1000);
1547         if (msg == NULL)
1548                 return NULL;
1549
1550         if (wps_build_version(msg) ||
1551             wps_build_msg_type(msg, WPS_M2) ||
1552             wps_build_enrollee_nonce(wps, msg) ||
1553             wps_build_registrar_nonce(wps, msg) ||
1554             wps_build_uuid_r(wps, msg) ||
1555             wps_build_public_key(wps, msg) ||
1556             wps_derive_keys(wps) ||
1557             wps_build_auth_type_flags(wps, msg) ||
1558             wps_build_encr_type_flags(wps, msg) ||
1559             wps_build_conn_type_flags(wps, msg) ||
1560             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1561             wps_build_device_attrs(&wps->wps->dev, msg) ||
1562             wps_build_rf_bands(&wps->wps->dev, msg) ||
1563             wps_build_assoc_state(wps, msg) ||
1564             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1565             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1566             wps_build_os_version(&wps->wps->dev, msg) ||
1567             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1568             wps_build_authenticator(wps, msg)) {
1569                 wpabuf_free(msg);
1570                 return NULL;
1571         }
1572
1573         wps->int_reg = 1;
1574         wps->state = RECV_M3;
1575         return msg;
1576 }
1577
1578
1579 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1580 {
1581         struct wpabuf *msg;
1582         u16 err = wps->config_error;
1583
1584         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1585         msg = wpabuf_alloc(1000);
1586         if (msg == NULL)
1587                 return NULL;
1588
1589         if (wps->wps->ap && wps->wps->ap_setup_locked &&
1590             err == WPS_CFG_NO_ERROR)
1591                 err = WPS_CFG_SETUP_LOCKED;
1592
1593         if (wps_build_version(msg) ||
1594             wps_build_msg_type(msg, WPS_M2D) ||
1595             wps_build_enrollee_nonce(wps, msg) ||
1596             wps_build_registrar_nonce(wps, msg) ||
1597             wps_build_uuid_r(wps, msg) ||
1598             wps_build_auth_type_flags(wps, msg) ||
1599             wps_build_encr_type_flags(wps, msg) ||
1600             wps_build_conn_type_flags(wps, msg) ||
1601             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1602             wps_build_device_attrs(&wps->wps->dev, msg) ||
1603             wps_build_rf_bands(&wps->wps->dev, msg) ||
1604             wps_build_assoc_state(wps, msg) ||
1605             wps_build_config_error(msg, err) ||
1606             wps_build_os_version(&wps->wps->dev, msg) ||
1607             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1608                 wpabuf_free(msg);
1609                 return NULL;
1610         }
1611
1612         wps->state = RECV_M2D_ACK;
1613         return msg;
1614 }
1615
1616
1617 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1618 {
1619         struct wpabuf *msg, *plain;
1620
1621         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1622
1623         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1624
1625         plain = wpabuf_alloc(200);
1626         if (plain == NULL)
1627                 return NULL;
1628
1629         msg = wpabuf_alloc(1000);
1630         if (msg == NULL) {
1631                 wpabuf_free(plain);
1632                 return NULL;
1633         }
1634
1635         if (wps_build_version(msg) ||
1636             wps_build_msg_type(msg, WPS_M4) ||
1637             wps_build_enrollee_nonce(wps, msg) ||
1638             wps_build_r_hash(wps, msg) ||
1639             wps_build_r_snonce1(wps, plain) ||
1640             wps_build_key_wrap_auth(wps, plain) ||
1641             wps_build_encr_settings(wps, msg, plain) ||
1642             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1643             wps_build_authenticator(wps, msg)) {
1644                 wpabuf_free(plain);
1645                 wpabuf_free(msg);
1646                 return NULL;
1647         }
1648         wpabuf_free(plain);
1649
1650         wps->state = RECV_M5;
1651         return msg;
1652 }
1653
1654
1655 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1656 {
1657         struct wpabuf *msg, *plain;
1658
1659         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1660
1661         plain = wpabuf_alloc(200);
1662         if (plain == NULL)
1663                 return NULL;
1664
1665         msg = wpabuf_alloc(1000);
1666         if (msg == NULL) {
1667                 wpabuf_free(plain);
1668                 return NULL;
1669         }
1670
1671         if (wps_build_version(msg) ||
1672             wps_build_msg_type(msg, WPS_M6) ||
1673             wps_build_enrollee_nonce(wps, msg) ||
1674             wps_build_r_snonce2(wps, plain) ||
1675             wps_build_key_wrap_auth(wps, plain) ||
1676             wps_build_encr_settings(wps, msg, plain) ||
1677             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1678             wps_build_authenticator(wps, msg)) {
1679                 wpabuf_free(plain);
1680                 wpabuf_free(msg);
1681                 return NULL;
1682         }
1683         wpabuf_free(plain);
1684
1685         wps->wps_pin_revealed = 1;
1686         wps->state = RECV_M7;
1687         return msg;
1688 }
1689
1690
1691 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1692 {
1693         struct wpabuf *msg, *plain;
1694
1695         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1696
1697         plain = wpabuf_alloc(500);
1698         if (plain == NULL)
1699                 return NULL;
1700
1701         msg = wpabuf_alloc(1000);
1702         if (msg == NULL) {
1703                 wpabuf_free(plain);
1704                 return NULL;
1705         }
1706
1707         if (wps_build_version(msg) ||
1708             wps_build_msg_type(msg, WPS_M8) ||
1709             wps_build_enrollee_nonce(wps, msg) ||
1710             ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1711             (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1712             wps_build_key_wrap_auth(wps, plain) ||
1713             wps_build_encr_settings(wps, msg, plain) ||
1714             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1715             wps_build_authenticator(wps, msg)) {
1716                 wpabuf_free(plain);
1717                 wpabuf_free(msg);
1718                 return NULL;
1719         }
1720         wpabuf_free(plain);
1721
1722         wps->state = RECV_DONE;
1723         return msg;
1724 }
1725
1726
1727 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
1728 {
1729         struct wpabuf *msg;
1730
1731         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
1732
1733         msg = wpabuf_alloc(1000);
1734         if (msg == NULL)
1735                 return NULL;
1736
1737         if (wps_build_version(msg) ||
1738             wps_build_msg_type(msg, WPS_WSC_ACK) ||
1739             wps_build_enrollee_nonce(wps, msg) ||
1740             wps_build_registrar_nonce(wps, msg) ||
1741             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1742                 wpabuf_free(msg);
1743                 return NULL;
1744         }
1745
1746         return msg;
1747 }
1748
1749
1750 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
1751 {
1752         struct wpabuf *msg;
1753
1754         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
1755
1756         msg = wpabuf_alloc(1000);
1757         if (msg == NULL)
1758                 return NULL;
1759
1760         if (wps_build_version(msg) ||
1761             wps_build_msg_type(msg, WPS_WSC_NACK) ||
1762             wps_build_enrollee_nonce(wps, msg) ||
1763             wps_build_registrar_nonce(wps, msg) ||
1764             wps_build_config_error(msg, wps->config_error) ||
1765             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1766                 wpabuf_free(msg);
1767                 return NULL;
1768         }
1769
1770         return msg;
1771 }
1772
1773
1774 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1775                                       enum wsc_op_code *op_code)
1776 {
1777         struct wpabuf *msg;
1778
1779 #ifdef CONFIG_WPS_UPNP
1780         if (!wps->int_reg && wps->wps->wps_upnp) {
1781                 struct upnp_pending_message *p, *prev = NULL;
1782                 if (wps->ext_reg > 1)
1783                         wps_registrar_free_pending_m2(wps->wps);
1784                 p = wps->wps->upnp_msgs;
1785                 /* TODO: check pending message MAC address */
1786                 while (p && p->next) {
1787                         prev = p;
1788                         p = p->next;
1789                 }
1790                 if (p) {
1791                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1792                                    "UPnP");
1793                         if (prev)
1794                                 prev->next = NULL;
1795                         else
1796                                 wps->wps->upnp_msgs = NULL;
1797                         msg = p->msg;
1798                         switch (p->type) {
1799                         case WPS_WSC_ACK:
1800                                 *op_code = WSC_ACK;
1801                                 break;
1802                         case WPS_WSC_NACK:
1803                                 *op_code = WSC_NACK;
1804                                 break;
1805                         default:
1806                                 *op_code = WSC_MSG;
1807                                 break;
1808                         }
1809                         os_free(p);
1810                         if (wps->ext_reg == 0)
1811                                 wps->ext_reg = 1;
1812                         return msg;
1813                 }
1814         }
1815         if (wps->ext_reg) {
1816                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1817                            "pending message available");
1818                 return NULL;
1819         }
1820 #endif /* CONFIG_WPS_UPNP */
1821
1822         switch (wps->state) {
1823         case SEND_M2:
1824                 if (wps_get_dev_password(wps) < 0)
1825                         msg = wps_build_m2d(wps);
1826                 else
1827                         msg = wps_build_m2(wps);
1828                 *op_code = WSC_MSG;
1829                 break;
1830         case SEND_M2D:
1831                 msg = wps_build_m2d(wps);
1832                 *op_code = WSC_MSG;
1833                 break;
1834         case SEND_M4:
1835                 msg = wps_build_m4(wps);
1836                 *op_code = WSC_MSG;
1837                 break;
1838         case SEND_M6:
1839                 msg = wps_build_m6(wps);
1840                 *op_code = WSC_MSG;
1841                 break;
1842         case SEND_M8:
1843                 msg = wps_build_m8(wps);
1844                 *op_code = WSC_MSG;
1845                 break;
1846         case RECV_DONE:
1847                 msg = wps_build_wsc_ack(wps);
1848                 *op_code = WSC_ACK;
1849                 break;
1850         case SEND_WSC_NACK:
1851                 msg = wps_build_wsc_nack(wps);
1852                 *op_code = WSC_NACK;
1853                 break;
1854         default:
1855                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1856                            "a message", wps->state);
1857                 msg = NULL;
1858                 break;
1859         }
1860
1861         if (*op_code == WSC_MSG && msg) {
1862                 /* Save a copy of the last message for Authenticator derivation
1863                  */
1864                 wpabuf_free(wps->last_msg);
1865                 wps->last_msg = wpabuf_dup(msg);
1866         }
1867
1868         return msg;
1869 }
1870
1871
1872 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1873 {
1874         if (e_nonce == NULL) {
1875                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1876                 return -1;
1877         }
1878
1879         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1880         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1881                     wps->nonce_e, WPS_NONCE_LEN);
1882
1883         return 0;
1884 }
1885
1886
1887 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1888 {
1889         if (r_nonce == NULL) {
1890                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1891                 return -1;
1892         }
1893
1894         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1895                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1896                 return -1;
1897         }
1898
1899         return 0;
1900 }
1901
1902
1903 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1904 {
1905         if (uuid_e == NULL) {
1906                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1907                 return -1;
1908         }
1909
1910         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1911         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1912
1913         return 0;
1914 }
1915
1916
1917 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1918 {
1919         if (pw_id == NULL) {
1920                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1921                 return -1;
1922         }
1923
1924         wps->dev_pw_id = WPA_GET_BE16(pw_id);
1925         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1926
1927         return 0;
1928 }
1929
1930
1931 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
1932 {
1933         if (e_hash1 == NULL) {
1934                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
1935                 return -1;
1936         }
1937
1938         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
1939         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
1940
1941         return 0;
1942 }
1943
1944
1945 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
1946 {
1947         if (e_hash2 == NULL) {
1948                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
1949                 return -1;
1950         }
1951
1952         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
1953         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
1954
1955         return 0;
1956 }
1957
1958
1959 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
1960 {
1961         u8 hash[SHA256_MAC_LEN];
1962         const u8 *addr[4];
1963         size_t len[4];
1964
1965         if (e_snonce1 == NULL) {
1966                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
1967                 return -1;
1968         }
1969
1970         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
1971                         WPS_SECRET_NONCE_LEN);
1972
1973         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
1974         addr[0] = e_snonce1;
1975         len[0] = WPS_SECRET_NONCE_LEN;
1976         addr[1] = wps->psk1;
1977         len[1] = WPS_PSK_LEN;
1978         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1979         len[2] = wpabuf_len(wps->dh_pubkey_e);
1980         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1981         len[3] = wpabuf_len(wps->dh_pubkey_r);
1982         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1983
1984         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
1985                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
1986                            "not match with the pre-committed value");
1987                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
1988                 wps_pwd_auth_fail_event(wps->wps, 0, 1);
1989                 return -1;
1990         }
1991
1992         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
1993                    "half of the device password");
1994
1995         return 0;
1996 }
1997
1998
1999 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2000 {
2001         u8 hash[SHA256_MAC_LEN];
2002         const u8 *addr[4];
2003         size_t len[4];
2004
2005         if (e_snonce2 == NULL) {
2006                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2007                 return -1;
2008         }
2009
2010         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2011                         WPS_SECRET_NONCE_LEN);
2012
2013         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2014         addr[0] = e_snonce2;
2015         len[0] = WPS_SECRET_NONCE_LEN;
2016         addr[1] = wps->psk2;
2017         len[1] = WPS_PSK_LEN;
2018         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2019         len[2] = wpabuf_len(wps->dh_pubkey_e);
2020         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2021         len[3] = wpabuf_len(wps->dh_pubkey_r);
2022         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2023
2024         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2025                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2026                            "not match with the pre-committed value");
2027                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2028                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2029                 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2030                 return -1;
2031         }
2032
2033         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2034                    "half of the device password");
2035         wps->wps_pin_revealed = 0;
2036         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2037
2038         return 0;
2039 }
2040
2041
2042 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2043 {
2044         if (mac_addr == NULL) {
2045                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2046                 return -1;
2047         }
2048
2049         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2050                    MAC2STR(mac_addr));
2051         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2052         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2053
2054         return 0;
2055 }
2056
2057
2058 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2059                               size_t pk_len)
2060 {
2061         if (pk == NULL || pk_len == 0) {
2062                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2063                 return -1;
2064         }
2065
2066 #ifdef CONFIG_WPS_OOB
2067         if (wps->wps->oob_conf.pubkey_hash != NULL) {
2068                 const u8 *addr[1];
2069                 u8 hash[WPS_HASH_LEN];
2070
2071                 addr[0] = pk;
2072                 sha256_vector(1, addr, &pk_len, hash);
2073                 if (os_memcmp(hash,
2074                               wpabuf_head(wps->wps->oob_conf.pubkey_hash),
2075                               WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2076                         wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
2077                         return -1;
2078                 }
2079         }
2080 #endif /* CONFIG_WPS_OOB */
2081
2082         wpabuf_free(wps->dh_pubkey_e);
2083         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2084         if (wps->dh_pubkey_e == NULL)
2085                 return -1;
2086
2087         return 0;
2088 }
2089
2090
2091 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2092 {
2093         u16 auth_types;
2094
2095         if (auth == NULL) {
2096                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2097                            "received");
2098                 return -1;
2099         }
2100
2101         auth_types = WPA_GET_BE16(auth);
2102
2103         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2104                    auth_types);
2105         wps->auth_type = wps->wps->auth_types & auth_types;
2106         if (wps->auth_type == 0) {
2107                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2108                            "authentication types (own 0x%x Enrollee 0x%x)",
2109                            wps->wps->auth_types, auth_types);
2110 #ifdef WPS_WORKAROUNDS
2111                 /*
2112                  * Some deployed implementations seem to advertise incorrect
2113                  * information in this attribute. For example, Linksys WRT350N
2114                  * seems to have a byteorder bug that breaks this negotiation.
2115                  * In order to interoperate with existing implementations,
2116                  * assume that the Enrollee supports everything we do.
2117                  */
2118                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2119                            "does not advertise supported authentication types "
2120                            "correctly");
2121                 wps->auth_type = wps->wps->auth_types;
2122 #else /* WPS_WORKAROUNDS */
2123                 return -1;
2124 #endif /* WPS_WORKAROUNDS */
2125         }
2126
2127         return 0;
2128 }
2129
2130
2131 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2132 {
2133         u16 encr_types;
2134
2135         if (encr == NULL) {
2136                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2137                            "received");
2138                 return -1;
2139         }
2140
2141         encr_types = WPA_GET_BE16(encr);
2142
2143         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2144                    encr_types);
2145         wps->encr_type = wps->wps->encr_types & encr_types;
2146         if (wps->encr_type == 0) {
2147                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2148                            "encryption types (own 0x%x Enrollee 0x%x)",
2149                            wps->wps->encr_types, encr_types);
2150 #ifdef WPS_WORKAROUNDS
2151                 /*
2152                  * Some deployed implementations seem to advertise incorrect
2153                  * information in this attribute. For example, Linksys WRT350N
2154                  * seems to have a byteorder bug that breaks this negotiation.
2155                  * In order to interoperate with existing implementations,
2156                  * assume that the Enrollee supports everything we do.
2157                  */
2158                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2159                            "does not advertise supported encryption types "
2160                            "correctly");
2161                 wps->encr_type = wps->wps->encr_types;
2162 #else /* WPS_WORKAROUNDS */
2163                 return -1;
2164 #endif /* WPS_WORKAROUNDS */
2165         }
2166
2167         return 0;
2168 }
2169
2170
2171 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2172 {
2173         if (conn == NULL) {
2174                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2175                            "received");
2176                 return -1;
2177         }
2178
2179         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2180                    *conn);
2181
2182         return 0;
2183 }
2184
2185
2186 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2187 {
2188         u16 m;
2189
2190         if (methods == NULL) {
2191                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2192                 return -1;
2193         }
2194
2195         m = WPA_GET_BE16(methods);
2196
2197         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2198                    "%s%s%s%s%s%s%s%s%s", m,
2199                    m & WPS_CONFIG_USBA ? " [USBA]" : "",
2200                    m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2201                    m & WPS_CONFIG_LABEL ? " [Label]" : "",
2202                    m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2203                    m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2204                    m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2205                    m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2206                    m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2207                    m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2208
2209         if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2210                 /*
2211                  * The Enrollee does not have a display so it is unlikely to be
2212                  * able to show the passphrase to a user and as such, could
2213                  * benefit from receiving PSK to reduce key derivation time.
2214                  */
2215                 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2216                            "Enrollee not supporting display");
2217                 wps->use_psk_key = 1;
2218         }
2219
2220         return 0;
2221 }
2222
2223
2224 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2225 {
2226         if (state == NULL) {
2227                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2228                            "received");
2229                 return -1;
2230         }
2231
2232         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2233                    *state);
2234
2235         return 0;
2236 }
2237
2238
2239 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2240 {
2241         u16 a;
2242
2243         if (assoc == NULL) {
2244                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2245                 return -1;
2246         }
2247
2248         a = WPA_GET_BE16(assoc);
2249         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2250
2251         return 0;
2252 }
2253
2254
2255 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2256 {
2257         u16 e;
2258
2259         if (err == NULL) {
2260                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2261                 return -1;
2262         }
2263
2264         e = WPA_GET_BE16(err);
2265         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2266
2267         return 0;
2268 }
2269
2270
2271 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2272                                            struct wps_parse_attr *attr)
2273 {
2274         wpa_printf(MSG_DEBUG, "WPS: Received M1");
2275
2276         if (wps->state != RECV_M1) {
2277                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2278                            "receiving M1", wps->state);
2279                 return WPS_FAILURE;
2280         }
2281
2282         if (wps_process_uuid_e(wps, attr->uuid_e) ||
2283             wps_process_mac_addr(wps, attr->mac_addr) ||
2284             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2285             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2286             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2287             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2288             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2289             wps_process_config_methods(wps, attr->config_methods) ||
2290             wps_process_wps_state(wps, attr->wps_state) ||
2291             wps_process_device_attrs(&wps->peer_dev, attr) ||
2292             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2293             wps_process_assoc_state(wps, attr->assoc_state) ||
2294             wps_process_dev_password_id(wps, attr->dev_password_id) ||
2295             wps_process_config_error(wps, attr->config_error) ||
2296             wps_process_os_version(&wps->peer_dev, attr->os_version))
2297                 return WPS_FAILURE;
2298
2299         if (wps->dev_pw_id < 0x10 &&
2300             wps->dev_pw_id != DEV_PW_DEFAULT &&
2301             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2302             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2303             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2304             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2305              !wps->wps->registrar->pbc)) {
2306                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2307                            wps->dev_pw_id);
2308                 wps->state = SEND_M2D;
2309                 return WPS_CONTINUE;
2310         }
2311
2312 #ifdef CONFIG_WPS_OOB
2313         if (wps->dev_pw_id >= 0x10 &&
2314             wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2315                 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2316                            "%d mismatch", wps->dev_pw_id);
2317                 wps->state = SEND_M2D;
2318                 return WPS_CONTINUE;
2319         }
2320 #endif /* CONFIG_WPS_OOB */
2321
2322         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2323                 if (wps->wps->registrar->force_pbc_overlap ||
2324                     wps_registrar_pbc_overlap(wps->wps->registrar,
2325                                               wps->mac_addr_e, wps->uuid_e)) {
2326                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2327                                    "negotiation");
2328                         wps->state = SEND_M2D;
2329                         wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2330                         wps_pbc_overlap_event(wps->wps);
2331                         wps->wps->registrar->force_pbc_overlap = 1;
2332                         return WPS_CONTINUE;
2333                 }
2334                 wps_registrar_add_pbc_session(wps->wps->registrar,
2335                                               wps->mac_addr_e, wps->uuid_e);
2336                 wps->pbc = 1;
2337         }
2338
2339 #ifdef WPS_WORKAROUNDS
2340         /*
2341          * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2342          * passphrase format. To avoid interop issues, force PSK format to be
2343          * used.
2344          */
2345         if (!wps->use_psk_key &&
2346             wps->peer_dev.manufacturer &&
2347             os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2348             wps->peer_dev.model_name &&
2349             os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2350                 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2351                            "PSK format");
2352                 wps->use_psk_key = 1;
2353         }
2354 #endif /* WPS_WORKAROUNDS */
2355
2356         wps->state = SEND_M2;
2357         return WPS_CONTINUE;
2358 }
2359
2360
2361 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2362                                            const struct wpabuf *msg,
2363                                            struct wps_parse_attr *attr)
2364 {
2365         wpa_printf(MSG_DEBUG, "WPS: Received M3");
2366
2367         if (wps->state != RECV_M3) {
2368                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2369                            "receiving M3", wps->state);
2370                 wps->state = SEND_WSC_NACK;
2371                 return WPS_CONTINUE;
2372         }
2373
2374         if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2375                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2376                            "session overlap");
2377                 wps->state = SEND_WSC_NACK;
2378                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2379                 return WPS_CONTINUE;
2380         }
2381
2382         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2383             wps_process_authenticator(wps, attr->authenticator, msg) ||
2384             wps_process_e_hash1(wps, attr->e_hash1) ||
2385             wps_process_e_hash2(wps, attr->e_hash2)) {
2386                 wps->state = SEND_WSC_NACK;
2387                 return WPS_CONTINUE;
2388         }
2389
2390         wps->state = SEND_M4;
2391         return WPS_CONTINUE;
2392 }
2393
2394
2395 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2396                                            const struct wpabuf *msg,
2397                                            struct wps_parse_attr *attr)
2398 {
2399         struct wpabuf *decrypted;
2400         struct wps_parse_attr eattr;
2401
2402         wpa_printf(MSG_DEBUG, "WPS: Received M5");
2403
2404         if (wps->state != RECV_M5) {
2405                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2406                            "receiving M5", wps->state);
2407                 wps->state = SEND_WSC_NACK;
2408                 return WPS_CONTINUE;
2409         }
2410
2411         if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2412                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2413                            "session overlap");
2414                 wps->state = SEND_WSC_NACK;
2415                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2416                 return WPS_CONTINUE;
2417         }
2418
2419         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2420             wps_process_authenticator(wps, attr->authenticator, msg)) {
2421                 wps->state = SEND_WSC_NACK;
2422                 return WPS_CONTINUE;
2423         }
2424
2425         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2426                                               attr->encr_settings_len);
2427         if (decrypted == NULL) {
2428                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2429                            "Settings attribute");
2430                 wps->state = SEND_WSC_NACK;
2431                 return WPS_CONTINUE;
2432         }
2433
2434         if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2435                 wpabuf_free(decrypted);
2436                 wps->state = SEND_WSC_NACK;
2437                 return WPS_CONTINUE;
2438         }
2439
2440         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2441                    "attribute");
2442         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2443             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2444             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2445                 wpabuf_free(decrypted);
2446                 wps->state = SEND_WSC_NACK;
2447                 return WPS_CONTINUE;
2448         }
2449         wpabuf_free(decrypted);
2450
2451         wps->state = SEND_M6;
2452         return WPS_CONTINUE;
2453 }
2454
2455
2456 static void wps_sta_cred_cb(struct wps_data *wps)
2457 {
2458         /*
2459          * Update credential to only include a single authentication and
2460          * encryption type in case the AP configuration includes more than one
2461          * option.
2462          */
2463         if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2464                 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2465         else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2466                 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2467         if (wps->cred.encr_type & WPS_ENCR_AES)
2468                 wps->cred.encr_type = WPS_ENCR_AES;
2469         else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2470                 wps->cred.encr_type = WPS_ENCR_TKIP;
2471         wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2472                    "AP configuration");
2473         if (wps->wps->cred_cb)
2474                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2475 }
2476
2477
2478 static void wps_cred_update(struct wps_credential *dst,
2479                             struct wps_credential *src)
2480 {
2481         os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2482         dst->ssid_len = src->ssid_len;
2483         dst->auth_type = src->auth_type;
2484         dst->encr_type = src->encr_type;
2485         dst->key_idx = src->key_idx;
2486         os_memcpy(dst->key, src->key, sizeof(dst->key));
2487         dst->key_len = src->key_len;
2488 }
2489
2490
2491 static int wps_process_ap_settings_r(struct wps_data *wps,
2492                                      struct wps_parse_attr *attr)
2493 {
2494         if (wps->wps->ap || wps->er)
2495                 return 0;
2496
2497         /* AP Settings Attributes in M7 when Enrollee is an AP */
2498         if (wps_process_ap_settings(attr, &wps->cred) < 0)
2499                 return -1;
2500
2501         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2502
2503         if (wps->new_ap_settings) {
2504                 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2505                            "new settings");
2506                 wps_cred_update(&wps->cred, wps->new_ap_settings);
2507                 return 0;
2508         } else {
2509                 /*
2510                  * Use the AP PIN only to receive the current AP settings, not
2511                  * to reconfigure the AP.
2512                  */
2513
2514                 /*
2515                  * Clear selected registrar here since we do not get to
2516                  * WSC_Done in this protocol run.
2517                  */
2518                 wps_registrar_pin_completed(wps->wps->registrar);
2519
2520                 if (wps->ap_settings_cb) {
2521                         wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2522                                             &wps->cred);
2523                         return 1;
2524                 }
2525                 wps_sta_cred_cb(wps);
2526                 return 1;
2527         }
2528 }
2529
2530
2531 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2532                                            const struct wpabuf *msg,
2533                                            struct wps_parse_attr *attr)
2534 {
2535         struct wpabuf *decrypted;
2536         struct wps_parse_attr eattr;
2537
2538         wpa_printf(MSG_DEBUG, "WPS: Received M7");
2539
2540         if (wps->state != RECV_M7) {
2541                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2542                            "receiving M7", wps->state);
2543                 wps->state = SEND_WSC_NACK;
2544                 return WPS_CONTINUE;
2545         }
2546
2547         if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2548                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2549                            "session overlap");
2550                 wps->state = SEND_WSC_NACK;
2551                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2552                 return WPS_CONTINUE;
2553         }
2554
2555         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2556             wps_process_authenticator(wps, attr->authenticator, msg)) {
2557                 wps->state = SEND_WSC_NACK;
2558                 return WPS_CONTINUE;
2559         }
2560
2561         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2562                                               attr->encr_settings_len);
2563         if (decrypted == NULL) {
2564                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2565                            "Settings attribute");
2566                 wps->state = SEND_WSC_NACK;
2567                 return WPS_CONTINUE;
2568         }
2569
2570         if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2571                                  attr->version2 != NULL) < 0) {
2572                 wpabuf_free(decrypted);
2573                 wps->state = SEND_WSC_NACK;
2574                 return WPS_CONTINUE;
2575         }
2576
2577         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2578                    "attribute");
2579         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2580             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2581             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2582             wps_process_ap_settings_r(wps, &eattr)) {
2583                 wpabuf_free(decrypted);
2584                 wps->state = SEND_WSC_NACK;
2585                 return WPS_CONTINUE;
2586         }
2587
2588         wpabuf_free(decrypted);
2589
2590         wps->state = SEND_M8;
2591         return WPS_CONTINUE;
2592 }
2593
2594
2595 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2596                                                 const struct wpabuf *msg)
2597 {
2598         struct wps_parse_attr attr;
2599         enum wps_process_res ret = WPS_CONTINUE;
2600
2601         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2602
2603         if (wps_parse_msg(msg, &attr) < 0)
2604                 return WPS_FAILURE;
2605
2606         if (attr.msg_type == NULL) {
2607                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2608                 return WPS_FAILURE;
2609         }
2610
2611         if (*attr.msg_type != WPS_M1 &&
2612             (attr.registrar_nonce == NULL ||
2613              os_memcmp(wps->nonce_r, attr.registrar_nonce,
2614                        WPS_NONCE_LEN != 0))) {
2615                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2616                 return WPS_FAILURE;
2617         }
2618
2619         switch (*attr.msg_type) {
2620         case WPS_M1:
2621                 if (wps_validate_m1(msg) < 0)
2622                         return WPS_FAILURE;
2623 #ifdef CONFIG_WPS_UPNP
2624                 if (wps->wps->wps_upnp && attr.mac_addr) {
2625                         /* Remove old pending messages when starting new run */
2626                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2627                         wps->wps->upnp_msgs = NULL;
2628
2629                         upnp_wps_device_send_wlan_event(
2630                                 wps->wps->wps_upnp, attr.mac_addr,
2631                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2632                 }
2633 #endif /* CONFIG_WPS_UPNP */
2634                 ret = wps_process_m1(wps, &attr);
2635                 break;
2636         case WPS_M3:
2637                 if (wps_validate_m3(msg) < 0)
2638                         return WPS_FAILURE;
2639                 ret = wps_process_m3(wps, msg, &attr);
2640                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2641                         wps_fail_event(wps->wps, WPS_M3, wps->config_error);
2642                 break;
2643         case WPS_M5:
2644                 if (wps_validate_m5(msg) < 0)
2645                         return WPS_FAILURE;
2646                 ret = wps_process_m5(wps, msg, &attr);
2647                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2648                         wps_fail_event(wps->wps, WPS_M5, wps->config_error);
2649                 break;
2650         case WPS_M7:
2651                 if (wps_validate_m7(msg) < 0)
2652                         return WPS_FAILURE;
2653                 ret = wps_process_m7(wps, msg, &attr);
2654                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2655                         wps_fail_event(wps->wps, WPS_M7, wps->config_error);
2656                 break;
2657         default:
2658                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2659                            *attr.msg_type);
2660                 return WPS_FAILURE;
2661         }
2662
2663         if (ret == WPS_CONTINUE) {
2664                 /* Save a copy of the last message for Authenticator derivation
2665                  */
2666                 wpabuf_free(wps->last_msg);
2667                 wps->last_msg = wpabuf_dup(msg);
2668         }
2669
2670         return ret;
2671 }
2672
2673
2674 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2675                                                 const struct wpabuf *msg)
2676 {
2677         struct wps_parse_attr attr;
2678
2679         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2680
2681         if (wps_parse_msg(msg, &attr) < 0)
2682                 return WPS_FAILURE;
2683
2684         if (attr.msg_type == NULL) {
2685                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2686                 return WPS_FAILURE;
2687         }
2688
2689         if (*attr.msg_type != WPS_WSC_ACK) {
2690                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2691                            *attr.msg_type);
2692                 return WPS_FAILURE;
2693         }
2694
2695 #ifdef CONFIG_WPS_UPNP
2696         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2697             upnp_wps_subscribers(wps->wps->wps_upnp)) {
2698                 if (wps->wps->upnp_msgs)
2699                         return WPS_CONTINUE;
2700                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2701                            "external Registrar");
2702                 return WPS_PENDING;
2703         }
2704 #endif /* CONFIG_WPS_UPNP */
2705
2706         if (attr.registrar_nonce == NULL ||
2707             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2708         {
2709                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2710                 return WPS_FAILURE;
2711         }
2712
2713         if (attr.enrollee_nonce == NULL ||
2714             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2715                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2716                 return WPS_FAILURE;
2717         }
2718
2719         if (wps->state == RECV_M2D_ACK) {
2720 #ifdef CONFIG_WPS_UPNP
2721                 if (wps->wps->wps_upnp &&
2722                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
2723                         if (wps->wps->upnp_msgs)
2724                                 return WPS_CONTINUE;
2725                         if (wps->ext_reg == 0)
2726                                 wps->ext_reg = 1;
2727                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2728                                    "external Registrar");
2729                         return WPS_PENDING;
2730                 }
2731 #endif /* CONFIG_WPS_UPNP */
2732
2733                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2734                            "terminate negotiation");
2735         }
2736
2737         return WPS_FAILURE;
2738 }
2739
2740
2741 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2742                                                  const struct wpabuf *msg)
2743 {
2744         struct wps_parse_attr attr;
2745         int old_state;
2746         u16 config_error;
2747
2748         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2749
2750         old_state = wps->state;
2751         wps->state = SEND_WSC_NACK;
2752
2753         if (wps_parse_msg(msg, &attr) < 0)
2754                 return WPS_FAILURE;
2755
2756         if (attr.msg_type == NULL) {
2757                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2758                 return WPS_FAILURE;
2759         }
2760
2761         if (*attr.msg_type != WPS_WSC_NACK) {
2762                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2763                            *attr.msg_type);
2764                 return WPS_FAILURE;
2765         }
2766
2767 #ifdef CONFIG_WPS_UPNP
2768         if (wps->wps->wps_upnp && wps->ext_reg) {
2769                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2770                            "Registrar terminated by the Enrollee");
2771                 return WPS_FAILURE;
2772         }
2773 #endif /* CONFIG_WPS_UPNP */
2774
2775         if (attr.registrar_nonce == NULL ||
2776             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2777         {
2778                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2779                 return WPS_FAILURE;
2780         }
2781
2782         if (attr.enrollee_nonce == NULL ||
2783             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2784                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2785                 return WPS_FAILURE;
2786         }
2787
2788         if (attr.config_error == NULL) {
2789                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2790                            "in WSC_NACK");
2791                 return WPS_FAILURE;
2792         }
2793
2794         config_error = WPA_GET_BE16(attr.config_error);
2795         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2796                    "Configuration Error %d", config_error);
2797
2798         switch (old_state) {
2799         case RECV_M3:
2800                 wps_fail_event(wps->wps, WPS_M2, config_error);
2801                 break;
2802         case RECV_M5:
2803                 wps_fail_event(wps->wps, WPS_M4, config_error);
2804                 break;
2805         case RECV_M7:
2806                 wps_fail_event(wps->wps, WPS_M6, config_error);
2807                 break;
2808         case RECV_DONE:
2809                 wps_fail_event(wps->wps, WPS_M8, config_error);
2810                 break;
2811         default:
2812                 break;
2813         }
2814
2815         return WPS_FAILURE;
2816 }
2817
2818
2819 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2820                                                  const struct wpabuf *msg)
2821 {
2822         struct wps_parse_attr attr;
2823
2824         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2825
2826         if (wps->state != RECV_DONE &&
2827             (!wps->wps->wps_upnp || !wps->ext_reg)) {
2828                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2829                            "receiving WSC_Done", wps->state);
2830                 return WPS_FAILURE;
2831         }
2832
2833         if (wps_parse_msg(msg, &attr) < 0)
2834                 return WPS_FAILURE;
2835
2836         if (attr.msg_type == NULL) {
2837                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2838                 return WPS_FAILURE;
2839         }
2840
2841         if (*attr.msg_type != WPS_WSC_DONE) {
2842                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2843                            *attr.msg_type);
2844                 return WPS_FAILURE;
2845         }
2846
2847 #ifdef CONFIG_WPS_UPNP
2848         if (wps->wps->wps_upnp && wps->ext_reg) {
2849                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2850                            "Registrar completed successfully");
2851                 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2852                                  wps->uuid_e);
2853                 return WPS_DONE;
2854         }
2855 #endif /* CONFIG_WPS_UPNP */
2856
2857         if (attr.registrar_nonce == NULL ||
2858             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2859         {
2860                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2861                 return WPS_FAILURE;
2862         }
2863
2864         if (attr.enrollee_nonce == NULL ||
2865             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2866                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2867                 return WPS_FAILURE;
2868         }
2869
2870         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
2871         wps_device_store(wps->wps->registrar, &wps->peer_dev,
2872                          wps->uuid_e);
2873
2874         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
2875             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
2876                 struct wps_credential cred;
2877
2878                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
2879                            "on first Enrollee connection");
2880
2881                 os_memset(&cred, 0, sizeof(cred));
2882                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
2883                 cred.ssid_len = wps->wps->ssid_len;
2884                 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
2885                 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
2886                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
2887                 cred.key_len = wps->new_psk_len;
2888
2889                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
2890                 wpa_hexdump_ascii_key(MSG_DEBUG,
2891                                       "WPS: Generated random passphrase",
2892                                       wps->new_psk, wps->new_psk_len);
2893                 if (wps->wps->cred_cb)
2894                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
2895
2896                 os_free(wps->new_psk);
2897                 wps->new_psk = NULL;
2898         }
2899
2900         if (!wps->wps->ap && !wps->er)
2901                 wps_sta_cred_cb(wps);
2902
2903         if (wps->new_psk) {
2904                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
2905                                    wps->new_psk, wps->new_psk_len)) {
2906                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
2907                                    "new PSK");
2908                 }
2909                 os_free(wps->new_psk);
2910                 wps->new_psk = NULL;
2911         }
2912
2913         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
2914
2915         if (wps->pbc) {
2916                 wps_registrar_remove_pbc_session(wps->wps->registrar,
2917                                                  wps->mac_addr_e, wps->uuid_e);
2918                 wps_registrar_pbc_completed(wps->wps->registrar);
2919         } else {
2920                 wps_registrar_pin_completed(wps->wps->registrar);
2921         }
2922         /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
2923          * merge them into APs own list.. */
2924
2925         wps_success_event(wps->wps);
2926
2927         return WPS_DONE;
2928 }
2929
2930
2931 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
2932                                                enum wsc_op_code op_code,
2933                                                const struct wpabuf *msg)
2934 {
2935         enum wps_process_res ret;
2936
2937         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
2938                    "op_code=%d)",
2939                    (unsigned long) wpabuf_len(msg), op_code);
2940
2941 #ifdef CONFIG_WPS_UPNP
2942         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
2943                 struct wps_parse_attr attr;
2944                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
2945                     *attr.msg_type == WPS_M3)
2946                         wps->ext_reg = 2; /* past M2/M2D phase */
2947         }
2948         if (wps->ext_reg > 1)
2949                 wps_registrar_free_pending_m2(wps->wps);
2950         if (wps->wps->wps_upnp && wps->ext_reg &&
2951             wps->wps->upnp_msgs == NULL &&
2952             (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
2953         {
2954                 struct wps_parse_attr attr;
2955                 int type;
2956                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
2957                         type = -1;
2958                 else
2959                         type = *attr.msg_type;
2960                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
2961                            " to external Registrar for processing", type);
2962                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
2963                                                 wps->mac_addr_e,
2964                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
2965                                                 msg);
2966                 if (op_code == WSC_MSG)
2967                         return WPS_PENDING;
2968         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
2969                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
2970                            "external Registrar");
2971                 return WPS_CONTINUE;
2972         }
2973 #endif /* CONFIG_WPS_UPNP */
2974
2975         switch (op_code) {
2976         case WSC_MSG:
2977                 return wps_process_wsc_msg(wps, msg);
2978         case WSC_ACK:
2979                 if (wps_validate_wsc_ack(msg) < 0)
2980                         return WPS_FAILURE;
2981                 return wps_process_wsc_ack(wps, msg);
2982         case WSC_NACK:
2983                 if (wps_validate_wsc_nack(msg) < 0)
2984                         return WPS_FAILURE;
2985                 return wps_process_wsc_nack(wps, msg);
2986         case WSC_Done:
2987                 if (wps_validate_wsc_done(msg) < 0)
2988                         return WPS_FAILURE;
2989                 ret = wps_process_wsc_done(wps, msg);
2990                 if (ret == WPS_FAILURE) {
2991                         wps->state = SEND_WSC_NACK;
2992                         wps_fail_event(wps->wps, WPS_WSC_DONE,
2993                                        wps->config_error);
2994                 }
2995                 return ret;
2996         default:
2997                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
2998                 return WPS_FAILURE;
2999         }
3000 }
3001
3002
3003 int wps_registrar_update_ie(struct wps_registrar *reg)
3004 {
3005         return wps_set_ie(reg);
3006 }
3007
3008
3009 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3010                                                void *timeout_ctx)
3011 {
3012         struct wps_registrar *reg = eloop_ctx;
3013
3014         wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3015                    "unselect internal Registrar");
3016         reg->selected_registrar = 0;
3017         reg->pbc = 0;
3018         wps_registrar_selected_registrar_changed(reg);
3019 }
3020
3021
3022 #ifdef CONFIG_WPS_UPNP
3023 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3024                                       struct subscription *s)
3025 {
3026         int i, j;
3027         wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3028                    "config_methods=0x%x)",
3029                    s->dev_password_id, s->config_methods);
3030         reg->sel_reg_union = 1;
3031         if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3032                 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3033         if (reg->sel_reg_config_methods_override == -1)
3034                 reg->sel_reg_config_methods_override = 0;
3035         reg->sel_reg_config_methods_override |= s->config_methods;
3036         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3037                 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3038                         break;
3039         for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3040              j++) {
3041                 if (is_zero_ether_addr(s->authorized_macs[j]))
3042                         break;
3043                 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3044                            MACSTR, MAC2STR(s->authorized_macs[j]));
3045                 os_memcpy(reg->authorized_macs_union[i],
3046                           s->authorized_macs[j], ETH_ALEN);
3047                 i++;
3048         }
3049         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3050                     (u8 *) reg->authorized_macs_union,
3051                     sizeof(reg->authorized_macs_union));
3052 }
3053 #endif /* CONFIG_WPS_UPNP */
3054
3055
3056 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3057 {
3058 #ifdef CONFIG_WPS_UPNP
3059         struct subscription *s;
3060
3061         if (reg->wps->wps_upnp == NULL)
3062                 return;
3063
3064         dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3065                          struct subscription, list) {
3066                 struct subscr_addr *sa;
3067                 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3068                 if (sa) {
3069                         wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3070                                    inet_ntoa(sa->saddr.sin_addr),
3071                                    ntohs(sa->saddr.sin_port));
3072                 }
3073                 if (s->selected_registrar)
3074                         wps_registrar_sel_reg_add(reg, s);
3075                 else
3076                         wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3077                                    "selected");
3078         }
3079 #endif /* CONFIG_WPS_UPNP */
3080 }
3081
3082
3083 /**
3084  * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3085  * @reg: Registrar data from wps_registrar_init()
3086  *
3087  * This function is called when selected registrar state changes, e.g., when an
3088  * AP receives a SetSelectedRegistrar UPnP message.
3089  */
3090 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3091 {
3092         wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3093
3094         reg->sel_reg_union = reg->selected_registrar;
3095         reg->sel_reg_dev_password_id_override = -1;
3096         reg->sel_reg_config_methods_override = -1;
3097         os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3098                   WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3099         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3100                     (u8 *) reg->authorized_macs_union,
3101                     sizeof(reg->authorized_macs_union));
3102         if (reg->selected_registrar) {
3103                 u16 methods;
3104
3105                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3106 #ifdef CONFIG_WPS2
3107                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3108                              WPS_CONFIG_PHY_PUSHBUTTON);
3109 #endif /* CONFIG_WPS2 */
3110                 if (reg->pbc) {
3111                         reg->sel_reg_dev_password_id_override =
3112                                 DEV_PW_PUSHBUTTON;
3113                         wps_set_pushbutton(&methods, reg->wps->config_methods);
3114                 }
3115                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3116                            "(pbc=%d)", reg->pbc);
3117                 reg->sel_reg_config_methods_override = methods;
3118         } else
3119                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3120
3121         wps_registrar_sel_reg_union(reg);
3122
3123         wps_set_ie(reg);
3124         wps_cb_set_sel_reg(reg);
3125 }
3126
3127
3128 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3129                            char *buf, size_t buflen)
3130 {
3131         struct wps_registrar_device *d;
3132         int len = 0, ret;
3133         char uuid[40];
3134         char devtype[WPS_DEV_TYPE_BUFSIZE];
3135
3136         d = wps_device_get(reg, addr);
3137         if (d == NULL)
3138                 return 0;
3139         if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3140                 return 0;
3141
3142         ret = os_snprintf(buf + len, buflen - len,
3143                           "wpsUuid=%s\n"
3144                           "wpsPrimaryDeviceType=%s\n"
3145                           "wpsDeviceName=%s\n"
3146                           "wpsManufacturer=%s\n"
3147                           "wpsModelName=%s\n"
3148                           "wpsModelNumber=%s\n"
3149                           "wpsSerialNumber=%s\n",
3150                           uuid,
3151                           wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3152                                                sizeof(devtype)),
3153                           d->dev.device_name ? d->dev.device_name : "",
3154                           d->dev.manufacturer ? d->dev.manufacturer : "",
3155                           d->dev.model_name ? d->dev.model_name : "",
3156                           d->dev.model_number ? d->dev.model_number : "",
3157                           d->dev.serial_number ? d->dev.serial_number : "");
3158         if (ret < 0 || (size_t) ret >= buflen - len)
3159                 return len;
3160         len += ret;
3161
3162         return len;
3163 }