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_pbc_timeout, reg, NULL);
 882         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
 883                                reg, NULL);
 884         return 0;
 885 }
 886
 887
 888 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
 889 {
 890         wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
 891         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 892         wps_registrar_stop_pbc(reg);
 893 }
 894
 895
 896 static void wps_registrar_pin_completed(struct wps_registrar *reg)
 897 {
 898         wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
 899         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 900         reg->selected_registrar = 0;
 901         wps_registrar_selected_registrar_changed(reg);
 902 }
 903
 904
 905 int wps_registrar_wps_cancel(struct wps_registrar *reg)
 906 {
 907         if (reg->pbc) {
 908                 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
 909                 wps_registrar_pbc_timeout(reg, NULL);
 910                 return 1;
 911         } else if (reg->selected_registrar) {
 912                 /* PIN Method */
 913                 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
 914                 wps_registrar_pin_completed(reg);
 915                 wps_registrar_invalidate_wildcard_pin(reg);
 916                 return 1;
 917         }
 918         return 0;
 919 }
 920
 921
 922 /**
 923  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
 924  * @reg: Registrar data from wps_registrar_init()
 925  * @addr: MAC address of the Probe Request sender
 926  * @wps_data: WPS IE contents
 927  *
 928  * This function is called on an AP when a Probe Request with WPS IE is
 929  * received. This is used to track PBC mode use and to detect possible overlap
 930  * situation with other WPS APs.
 931  */
 932 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
 933                                 const struct wpabuf *wps_data,
 934                                 int p2p_wildcard)
 935 {
 936         struct wps_parse_attr attr;
 937
 938         wpa_hexdump_buf(MSG_MSGDUMP,
 939                         "WPS: Probe Request with WPS data received",
 940                         wps_data);
 941
 942         if (wps_parse_msg(wps_data, &attr) < 0)
 943                 return;
 944
 945         if (attr.config_methods == NULL) {
 946                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
 947                            "Probe Request");
 948                 return;
 949         }
 950
 951         if (attr.dev_password_id == NULL) {
 952                 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
 953                            "in Probe Request");
 954                 return;
 955         }
 956
 957         if (reg->enrollee_seen_cb && attr.uuid_e &&
 958             attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
 959                 char *dev_name = NULL;
 960                 if (attr.dev_name) {
 961                         dev_name = os_zalloc(attr.dev_name_len + 1);
 962                         if (dev_name) {
 963                                 os_memcpy(dev_name, attr.dev_name,
 964                                           attr.dev_name_len);
 965                         }
 966                 }
 967                 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
 968                                       attr.primary_dev_type,
 969                                       WPA_GET_BE16(attr.config_methods),
 970                                       WPA_GET_BE16(attr.dev_password_id),
 971                                       *attr.request_type, dev_name);
 972                 os_free(dev_name);
 973         }
 974
 975         if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
 976                 return; /* Not PBC */
 977
 978         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
 979                    MACSTR, MAC2STR(addr));
 980         if (attr.uuid_e == NULL) {
 981                 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
 982                            "UUID-E included");
 983                 return;
 984         }
 985
 986         wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
 987         if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
 988                 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
 989                 reg->force_pbc_overlap = 1;
 990                 wps_pbc_overlap_event(reg->wps);
 991         }
 992 }
 993
 994
 995 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
 996                           const u8 *psk, size_t psk_len)
 997 {
 998         if (reg->new_psk_cb == NULL)
 999                 return 0;
1000
1001         return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1002 }
1003
1004
1005 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1006                               const struct wps_device_data *dev)
1007 {
1008         if (reg->pin_needed_cb == NULL)
1009                 return;
1010
1011         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1012 }
1013
1014
1015 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1016                                const u8 *uuid_e)
1017 {
1018         if (reg->reg_success_cb == NULL)
1019                 return;
1020
1021         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
1022 }
1023
1024
1025 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1026                          struct wpabuf *probe_resp_ie)
1027 {
1028         return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1029 }
1030
1031
1032 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1033 {
1034         u16 methods = 0;
1035         if (reg->set_sel_reg_cb == NULL)
1036                 return;
1037
1038         if (reg->selected_registrar) {
1039                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1040 #ifdef CONFIG_WPS2
1041                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1042                              WPS_CONFIG_PHY_PUSHBUTTON);
1043 #endif /* CONFIG_WPS2 */
1044                 if (reg->pbc)
1045                         wps_set_pushbutton(&methods, reg->wps->config_methods);
1046         }
1047
1048         wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1049                    "config_methods=0x%x pbc=%d methods=0x%x",
1050                    reg->selected_registrar, reg->wps->config_methods,
1051                    reg->pbc, methods);
1052
1053         reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1054                             reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1055                             methods);
1056 }
1057
1058
1059 static int wps_set_ie(struct wps_registrar *reg)
1060 {
1061         struct wpabuf *beacon;
1062         struct wpabuf *probe;
1063         const u8 *auth_macs;
1064         size_t count;
1065
1066         if (reg->set_ie_cb == NULL)
1067                 return 0;
1068
1069         beacon = wpabuf_alloc(400);
1070         if (beacon == NULL)
1071                 return -1;
1072         probe = wpabuf_alloc(500);
1073         if (probe == NULL) {
1074                 wpabuf_free(beacon);
1075                 return -1;
1076         }
1077
1078         auth_macs = wps_authorized_macs(reg, &count);
1079
1080         wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1081
1082         if (wps_build_version(beacon) ||
1083             wps_build_wps_state(reg->wps, beacon) ||
1084             wps_build_ap_setup_locked(reg->wps, beacon) ||
1085             wps_build_selected_registrar(reg, beacon) ||
1086             wps_build_sel_reg_dev_password_id(reg, beacon) ||
1087             wps_build_sel_reg_config_methods(reg, beacon) ||
1088             wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1089             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1090             wps_build_wfa_ext(beacon, 0, auth_macs, count)) {
1091                 wpabuf_free(beacon);
1092                 wpabuf_free(probe);
1093                 return -1;
1094         }
1095
1096         wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1097
1098         if (wps_build_version(probe) ||
1099             wps_build_wps_state(reg->wps, probe) ||
1100             wps_build_ap_setup_locked(reg->wps, probe) ||
1101             wps_build_selected_registrar(reg, probe) ||
1102             wps_build_sel_reg_dev_password_id(reg, probe) ||
1103             wps_build_sel_reg_config_methods(reg, probe) ||
1104             wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1105                                 WPS_RESP_REGISTRAR) ||
1106             wps_build_uuid_e(probe, reg->wps->uuid) ||
1107             wps_build_device_attrs(&reg->wps->dev, probe) ||
1108             wps_build_probe_config_methods(reg, probe) ||
1109             wps_build_rf_bands(&reg->wps->dev, probe) ||
1110             wps_build_wfa_ext(probe, 0, auth_macs, count)) {
1111                 wpabuf_free(beacon);
1112                 wpabuf_free(probe);
1113                 return -1;
1114         }
1115
1116 #ifdef CONFIG_P2P
1117         if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1118             wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1119                 wpabuf_free(beacon);
1120                 wpabuf_free(probe);
1121                 return -1;
1122         }
1123 #endif /* CONFIG_P2P */
1124
1125         beacon = wps_ie_encapsulate(beacon);
1126         probe = wps_ie_encapsulate(probe);
1127
1128         if (!beacon || !probe) {
1129                 wpabuf_free(beacon);
1130                 wpabuf_free(probe);
1131                 return -1;
1132         }
1133
1134         if (reg->static_wep_only) {
1135                 /*
1136                  * Windows XP and Vista clients can get confused about
1137                  * EAP-Identity/Request when they probe the network with
1138                  * EAPOL-Start. In such a case, they may assume the network is
1139                  * using IEEE 802.1X and prompt user for a certificate while
1140                  * the correct (non-WPS) behavior would be to ask for the
1141                  * static WEP key. As a workaround, use Microsoft Provisioning
1142                  * IE to advertise that legacy 802.1X is not supported.
1143                  */
1144                 const u8 ms_wps[7] = {
1145                         WLAN_EID_VENDOR_SPECIFIC, 5,
1146                         /* Microsoft Provisioning IE (00:50:f2:5) */
1147                         0x00, 0x50, 0xf2, 5,
1148                         0x00 /* no legacy 802.1X or MS WPS */
1149                 };
1150                 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1151                            "into Beacon/Probe Response frames");
1152                 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1153                 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1154         }
1155
1156         return wps_cb_set_ie(reg, beacon, probe);
1157 }
1158
1159
1160 static int wps_get_dev_password(struct wps_data *wps)
1161 {
1162         const u8 *pin;
1163         size_t pin_len = 0;
1164
1165         os_free(wps->dev_password);
1166         wps->dev_password = NULL;
1167
1168         if (wps->pbc) {
1169                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1170                 pin = (const u8 *) "00000000";
1171                 pin_len = 8;
1172         } else {
1173                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1174                                             &pin_len);
1175         }
1176         if (pin == NULL) {
1177                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1178                            "the Enrollee");
1179                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1180                                   &wps->peer_dev);
1181                 return -1;
1182         }
1183
1184         wps->dev_password = os_malloc(pin_len);
1185         if (wps->dev_password == NULL)
1186                 return -1;
1187         os_memcpy(wps->dev_password, pin, pin_len);
1188         wps->dev_password_len = pin_len;
1189
1190         return 0;
1191 }
1192
1193
1194 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1195 {
1196         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1197         wpabuf_put_be16(msg, ATTR_UUID_R);
1198         wpabuf_put_be16(msg, WPS_UUID_LEN);
1199         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1200         return 0;
1201 }
1202
1203
1204 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1205 {
1206         u8 *hash;
1207         const u8 *addr[4];
1208         size_t len[4];
1209
1210         if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1211                 return -1;
1212         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1213         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1214                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1215
1216         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1217                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1218                            "R-Hash derivation");
1219                 return -1;
1220         }
1221
1222         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1223         wpabuf_put_be16(msg, ATTR_R_HASH1);
1224         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1225         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1226         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1227         addr[0] = wps->snonce;
1228         len[0] = WPS_SECRET_NONCE_LEN;
1229         addr[1] = wps->psk1;
1230         len[1] = WPS_PSK_LEN;
1231         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1232         len[2] = wpabuf_len(wps->dh_pubkey_e);
1233         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1234         len[3] = wpabuf_len(wps->dh_pubkey_r);
1235         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1236         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1237
1238         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1239         wpabuf_put_be16(msg, ATTR_R_HASH2);
1240         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1241         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1242         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1243         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1244         addr[1] = wps->psk2;
1245         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1246         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1247
1248         return 0;
1249 }
1250
1251
1252 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1253 {
1254         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1255         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1256         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1257         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1258         return 0;
1259 }
1260
1261
1262 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1263 {
1264         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1265         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1266         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1267         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1268                         WPS_SECRET_NONCE_LEN);
1269         return 0;
1270 }
1271
1272
1273 static int wps_build_cred_network_idx(struct wpabuf *msg,
1274                                       const struct wps_credential *cred)
1275 {
1276         wpa_printf(MSG_DEBUG, "WPS:  * Network Index");
1277         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1278         wpabuf_put_be16(msg, 1);
1279         wpabuf_put_u8(msg, 1);
1280         return 0;
1281 }
1282
1283
1284 static int wps_build_cred_ssid(struct wpabuf *msg,
1285                                const struct wps_credential *cred)
1286 {
1287         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1288         wpabuf_put_be16(msg, ATTR_SSID);
1289         wpabuf_put_be16(msg, cred->ssid_len);
1290         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1291         return 0;
1292 }
1293
1294
1295 static int wps_build_cred_auth_type(struct wpabuf *msg,
1296                                     const struct wps_credential *cred)
1297 {
1298         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1299                    cred->auth_type);
1300         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1301         wpabuf_put_be16(msg, 2);
1302         wpabuf_put_be16(msg, cred->auth_type);
1303         return 0;
1304 }
1305
1306
1307 static int wps_build_cred_encr_type(struct wpabuf *msg,
1308                                     const struct wps_credential *cred)
1309 {
1310         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1311                    cred->encr_type);
1312         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1313         wpabuf_put_be16(msg, 2);
1314         wpabuf_put_be16(msg, cred->encr_type);
1315         return 0;
1316 }
1317
1318
1319 static int wps_build_cred_network_key(struct wpabuf *msg,
1320                                       const struct wps_credential *cred)
1321 {
1322         wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1323                    (int) cred->key_len);
1324         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1325         wpabuf_put_be16(msg, cred->key_len);
1326         wpabuf_put_data(msg, cred->key, cred->key_len);
1327         return 0;
1328 }
1329
1330
1331 static int wps_build_cred_mac_addr(struct wpabuf *msg,
1332                                    const struct wps_credential *cred)
1333 {
1334         wpa_printf(MSG_DEBUG, "WPS:  * MAC Address (" MACSTR ")",
1335                    MAC2STR(cred->mac_addr));
1336         wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1337         wpabuf_put_be16(msg, ETH_ALEN);
1338         wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1339         return 0;
1340 }
1341
1342
1343 static int wps_build_credential(struct wpabuf *msg,
1344                                 const struct wps_credential *cred)
1345 {
1346         if (wps_build_cred_network_idx(msg, cred) ||
1347             wps_build_cred_ssid(msg, cred) ||
1348             wps_build_cred_auth_type(msg, cred) ||
1349             wps_build_cred_encr_type(msg, cred) ||
1350             wps_build_cred_network_key(msg, cred) ||
1351             wps_build_cred_mac_addr(msg, cred))
1352                 return -1;
1353         return 0;
1354 }
1355
1356
1357 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1358 {
1359         struct wpabuf *cred;
1360
1361         if (wps->wps->registrar->skip_cred_build)
1362                 goto skip_cred_build;
1363
1364         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1365         if (wps->use_cred) {
1366                 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1367                 goto use_provided;
1368         }
1369         os_memset(&wps->cred, 0, sizeof(wps->cred));
1370
1371         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1372         wps->cred.ssid_len = wps->wps->ssid_len;
1373
1374         /* Select the best authentication and encryption type */
1375         if (wps->auth_type & WPS_AUTH_WPA2PSK)
1376                 wps->auth_type = WPS_AUTH_WPA2PSK;
1377         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1378                 wps->auth_type = WPS_AUTH_WPAPSK;
1379         else if (wps->auth_type & WPS_AUTH_OPEN)
1380                 wps->auth_type = WPS_AUTH_OPEN;
1381         else if (wps->auth_type & WPS_AUTH_SHARED)
1382                 wps->auth_type = WPS_AUTH_SHARED;
1383         else {
1384                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1385                            wps->auth_type);
1386                 return -1;
1387         }
1388         wps->cred.auth_type = wps->auth_type;
1389
1390         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1391             wps->auth_type == WPS_AUTH_WPAPSK) {
1392                 if (wps->encr_type & WPS_ENCR_AES)
1393                         wps->encr_type = WPS_ENCR_AES;
1394                 else if (wps->encr_type & WPS_ENCR_TKIP)
1395                         wps->encr_type = WPS_ENCR_TKIP;
1396                 else {
1397                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1398                                    "type for WPA/WPA2");
1399                         return -1;
1400                 }
1401         } else {
1402                 if (wps->encr_type & WPS_ENCR_WEP)
1403                         wps->encr_type = WPS_ENCR_WEP;
1404                 else if (wps->encr_type & WPS_ENCR_NONE)
1405                         wps->encr_type = WPS_ENCR_NONE;
1406                 else {
1407                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1408                                    "type for non-WPA/WPA2 mode");
1409                         return -1;
1410                 }
1411         }
1412         wps->cred.encr_type = wps->encr_type;
1413         /*
1414          * Set MAC address in the Credential to be the Enrollee's MAC address
1415          */
1416         os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1417
1418         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1419             !wps->wps->registrar->disable_auto_conf) {
1420                 u8 r[16];
1421                 /* Generate a random passphrase */
1422                 if (os_get_random(r, sizeof(r)) < 0)
1423                         return -1;
1424                 os_free(wps->new_psk);
1425                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1426                 if (wps->new_psk == NULL)
1427                         return -1;
1428                 wps->new_psk_len--; /* remove newline */
1429                 while (wps->new_psk_len &&
1430                        wps->new_psk[wps->new_psk_len - 1] == '=')
1431                         wps->new_psk_len--;
1432                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1433                                       wps->new_psk, wps->new_psk_len);
1434                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1435                 wps->cred.key_len = wps->new_psk_len;
1436         } else if (wps->use_psk_key && wps->wps->psk_set) {
1437                 char hex[65];
1438                 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1439                 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1440                 os_memcpy(wps->cred.key, hex, 32 * 2);
1441                 wps->cred.key_len = 32 * 2;
1442         } else if (wps->wps->network_key) {
1443                 os_memcpy(wps->cred.key, wps->wps->network_key,
1444                           wps->wps->network_key_len);
1445                 wps->cred.key_len = wps->wps->network_key_len;
1446         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1447                 char hex[65];
1448                 /* Generate a random per-device PSK */
1449                 os_free(wps->new_psk);
1450                 wps->new_psk_len = 32;
1451                 wps->new_psk = os_malloc(wps->new_psk_len);
1452                 if (wps->new_psk == NULL)
1453                         return -1;
1454                 if (os_get_random(wps->new_psk, wps->new_psk_len) < 0) {
1455                         os_free(wps->new_psk);
1456                         wps->new_psk = NULL;
1457                         return -1;
1458                 }
1459                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1460                                 wps->new_psk, wps->new_psk_len);
1461                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1462                                  wps->new_psk_len);
1463                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1464                 wps->cred.key_len = wps->new_psk_len * 2;
1465         }
1466
1467 use_provided:
1468 #ifdef CONFIG_WPS_TESTING_EXTRA_CRED
1469         cred = wpabuf_alloc(200);
1470         if (cred) {
1471                 struct wps_credential dummy;
1472                 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1473                 os_memset(&dummy, 0, sizeof(dummy));
1474                 os_memcpy(dummy.ssid, "dummy", 5);
1475                 dummy.ssid_len = 5;
1476                 dummy.auth_type = WPS_AUTH_WPA2PSK;
1477                 dummy.encr_type = WPS_ENCR_AES;
1478                 os_memcpy(dummy.key, "dummy psk", 9);
1479                 dummy.key_len = 9;
1480                 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1481                 wps_build_credential(cred, &dummy);
1482                 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1483
1484                 wpabuf_put_be16(msg, ATTR_CRED);
1485                 wpabuf_put_be16(msg, wpabuf_len(cred));
1486                 wpabuf_put_buf(msg, cred);
1487
1488                 wpabuf_free(cred);
1489         }
1490 #endif /* CONFIG_WPS_TESTING_EXTRA_CRED */
1491
1492         cred = wpabuf_alloc(200);
1493         if (cred == NULL)
1494                 return -1;
1495
1496         if (wps_build_credential(cred, &wps->cred)) {
1497                 wpabuf_free(cred);
1498                 return -1;
1499         }
1500
1501         wpabuf_put_be16(msg, ATTR_CRED);
1502         wpabuf_put_be16(msg, wpabuf_len(cred));
1503         wpabuf_put_buf(msg, cred);
1504         wpabuf_free(cred);
1505
1506 skip_cred_build:
1507         if (wps->wps->registrar->extra_cred) {
1508                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1509                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1510         }
1511
1512         return 0;
1513 }
1514
1515
1516 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1517 {
1518         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1519
1520         if (wps_build_credential(msg, &wps->cred))
1521                 return -1;
1522
1523         return 0;
1524 }
1525
1526
1527 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1528 {
1529         struct wpabuf *msg;
1530
1531         if (os_get_random(wps->nonce_r, WPS_NONCE_LEN) < 0)
1532                 return NULL;
1533         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1534                     wps->nonce_r, WPS_NONCE_LEN);
1535         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1536
1537         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1538         msg = wpabuf_alloc(1000);
1539         if (msg == NULL)
1540                 return NULL;
1541
1542         if (wps_build_version(msg) ||
1543             wps_build_msg_type(msg, WPS_M2) ||
1544             wps_build_enrollee_nonce(wps, msg) ||
1545             wps_build_registrar_nonce(wps, msg) ||
1546             wps_build_uuid_r(wps, msg) ||
1547             wps_build_public_key(wps, msg) ||
1548             wps_derive_keys(wps) ||
1549             wps_build_auth_type_flags(wps, msg) ||
1550             wps_build_encr_type_flags(wps, msg) ||
1551             wps_build_conn_type_flags(wps, msg) ||
1552             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1553             wps_build_device_attrs(&wps->wps->dev, msg) ||
1554             wps_build_rf_bands(&wps->wps->dev, msg) ||
1555             wps_build_assoc_state(wps, msg) ||
1556             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1557             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1558             wps_build_os_version(&wps->wps->dev, msg) ||
1559             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1560             wps_build_authenticator(wps, msg)) {
1561                 wpabuf_free(msg);
1562                 return NULL;
1563         }
1564
1565         wps->int_reg = 1;
1566         wps->state = RECV_M3;
1567         return msg;
1568 }
1569
1570
1571 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1572 {
1573         struct wpabuf *msg;
1574         u16 err = wps->config_error;
1575
1576         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1577         msg = wpabuf_alloc(1000);
1578         if (msg == NULL)
1579                 return NULL;
1580
1581         if (wps->wps->ap && wps->wps->ap_setup_locked &&
1582             err == WPS_CFG_NO_ERROR)
1583                 err = WPS_CFG_SETUP_LOCKED;
1584
1585         if (wps_build_version(msg) ||
1586             wps_build_msg_type(msg, WPS_M2D) ||
1587             wps_build_enrollee_nonce(wps, msg) ||
1588             wps_build_registrar_nonce(wps, msg) ||
1589             wps_build_uuid_r(wps, msg) ||
1590             wps_build_auth_type_flags(wps, msg) ||
1591             wps_build_encr_type_flags(wps, msg) ||
1592             wps_build_conn_type_flags(wps, msg) ||
1593             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1594             wps_build_device_attrs(&wps->wps->dev, msg) ||
1595             wps_build_rf_bands(&wps->wps->dev, msg) ||
1596             wps_build_assoc_state(wps, msg) ||
1597             wps_build_config_error(msg, err) ||
1598             wps_build_os_version(&wps->wps->dev, msg) ||
1599             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1600                 wpabuf_free(msg);
1601                 return NULL;
1602         }
1603
1604         wps->state = RECV_M2D_ACK;
1605         return msg;
1606 }
1607
1608
1609 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1610 {
1611         struct wpabuf *msg, *plain;
1612
1613         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1614
1615         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1616
1617         plain = wpabuf_alloc(200);
1618         if (plain == NULL)
1619                 return NULL;
1620
1621         msg = wpabuf_alloc(1000);
1622         if (msg == NULL) {
1623                 wpabuf_free(plain);
1624                 return NULL;
1625         }
1626
1627         if (wps_build_version(msg) ||
1628             wps_build_msg_type(msg, WPS_M4) ||
1629             wps_build_enrollee_nonce(wps, msg) ||
1630             wps_build_r_hash(wps, msg) ||
1631             wps_build_r_snonce1(wps, plain) ||
1632             wps_build_key_wrap_auth(wps, plain) ||
1633             wps_build_encr_settings(wps, msg, plain) ||
1634             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1635             wps_build_authenticator(wps, msg)) {
1636                 wpabuf_free(plain);
1637                 wpabuf_free(msg);
1638                 return NULL;
1639         }
1640         wpabuf_free(plain);
1641
1642         wps->state = RECV_M5;
1643         return msg;
1644 }
1645
1646
1647 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1648 {
1649         struct wpabuf *msg, *plain;
1650
1651         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1652
1653         plain = wpabuf_alloc(200);
1654         if (plain == NULL)
1655                 return NULL;
1656
1657         msg = wpabuf_alloc(1000);
1658         if (msg == NULL) {
1659                 wpabuf_free(plain);
1660                 return NULL;
1661         }
1662
1663         if (wps_build_version(msg) ||
1664             wps_build_msg_type(msg, WPS_M6) ||
1665             wps_build_enrollee_nonce(wps, msg) ||
1666             wps_build_r_snonce2(wps, plain) ||
1667             wps_build_key_wrap_auth(wps, plain) ||
1668             wps_build_encr_settings(wps, msg, plain) ||
1669             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1670             wps_build_authenticator(wps, msg)) {
1671                 wpabuf_free(plain);
1672                 wpabuf_free(msg);
1673                 return NULL;
1674         }
1675         wpabuf_free(plain);
1676
1677         wps->wps_pin_revealed = 1;
1678         wps->state = RECV_M7;
1679         return msg;
1680 }
1681
1682
1683 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1684 {
1685         struct wpabuf *msg, *plain;
1686
1687         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1688
1689         plain = wpabuf_alloc(500);
1690         if (plain == NULL)
1691                 return NULL;
1692
1693         msg = wpabuf_alloc(1000);
1694         if (msg == NULL) {
1695                 wpabuf_free(plain);
1696                 return NULL;
1697         }
1698
1699         if (wps_build_version(msg) ||
1700             wps_build_msg_type(msg, WPS_M8) ||
1701             wps_build_enrollee_nonce(wps, msg) ||
1702             ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1703             (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1704             wps_build_key_wrap_auth(wps, plain) ||
1705             wps_build_encr_settings(wps, msg, plain) ||
1706             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1707             wps_build_authenticator(wps, msg)) {
1708                 wpabuf_free(plain);
1709                 wpabuf_free(msg);
1710                 return NULL;
1711         }
1712         wpabuf_free(plain);
1713
1714         wps->state = RECV_DONE;
1715         return msg;
1716 }
1717
1718
1719 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
1720 {
1721         struct wpabuf *msg;
1722
1723         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
1724
1725         msg = wpabuf_alloc(1000);
1726         if (msg == NULL)
1727                 return NULL;
1728
1729         if (wps_build_version(msg) ||
1730             wps_build_msg_type(msg, WPS_WSC_ACK) ||
1731             wps_build_enrollee_nonce(wps, msg) ||
1732             wps_build_registrar_nonce(wps, msg) ||
1733             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1734                 wpabuf_free(msg);
1735                 return NULL;
1736         }
1737
1738         return msg;
1739 }
1740
1741
1742 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
1743 {
1744         struct wpabuf *msg;
1745
1746         wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
1747
1748         msg = wpabuf_alloc(1000);
1749         if (msg == NULL)
1750                 return NULL;
1751
1752         if (wps_build_version(msg) ||
1753             wps_build_msg_type(msg, WPS_WSC_NACK) ||
1754             wps_build_enrollee_nonce(wps, msg) ||
1755             wps_build_registrar_nonce(wps, msg) ||
1756             wps_build_config_error(msg, wps->config_error) ||
1757             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1758                 wpabuf_free(msg);
1759                 return NULL;
1760         }
1761
1762         return msg;
1763 }
1764
1765
1766 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1767                                       enum wsc_op_code *op_code)
1768 {
1769         struct wpabuf *msg;
1770
1771 #ifdef CONFIG_WPS_UPNP
1772         if (!wps->int_reg && wps->wps->wps_upnp) {
1773                 struct upnp_pending_message *p, *prev = NULL;
1774                 if (wps->ext_reg > 1)
1775                         wps_registrar_free_pending_m2(wps->wps);
1776                 p = wps->wps->upnp_msgs;
1777                 /* TODO: check pending message MAC address */
1778                 while (p && p->next) {
1779                         prev = p;
1780                         p = p->next;
1781                 }
1782                 if (p) {
1783                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1784                                    "UPnP");
1785                         if (prev)
1786                                 prev->next = NULL;
1787                         else
1788                                 wps->wps->upnp_msgs = NULL;
1789                         msg = p->msg;
1790                         switch (p->type) {
1791                         case WPS_WSC_ACK:
1792                                 *op_code = WSC_ACK;
1793                                 break;
1794                         case WPS_WSC_NACK:
1795                                 *op_code = WSC_NACK;
1796                                 break;
1797                         default:
1798                                 *op_code = WSC_MSG;
1799                                 break;
1800                         }
1801                         os_free(p);
1802                         if (wps->ext_reg == 0)
1803                                 wps->ext_reg = 1;
1804                         return msg;
1805                 }
1806         }
1807         if (wps->ext_reg) {
1808                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1809                            "pending message available");
1810                 return NULL;
1811         }
1812 #endif /* CONFIG_WPS_UPNP */
1813
1814         switch (wps->state) {
1815         case SEND_M2:
1816                 if (wps_get_dev_password(wps) < 0)
1817                         msg = wps_build_m2d(wps);
1818                 else
1819                         msg = wps_build_m2(wps);
1820                 *op_code = WSC_MSG;
1821                 break;
1822         case SEND_M2D:
1823                 msg = wps_build_m2d(wps);
1824                 *op_code = WSC_MSG;
1825                 break;
1826         case SEND_M4:
1827                 msg = wps_build_m4(wps);
1828                 *op_code = WSC_MSG;
1829                 break;
1830         case SEND_M6:
1831                 msg = wps_build_m6(wps);
1832                 *op_code = WSC_MSG;
1833                 break;
1834         case SEND_M8:
1835                 msg = wps_build_m8(wps);
1836                 *op_code = WSC_MSG;
1837                 break;
1838         case RECV_DONE:
1839                 msg = wps_build_wsc_ack(wps);
1840                 *op_code = WSC_ACK;
1841                 break;
1842         case SEND_WSC_NACK:
1843                 msg = wps_build_wsc_nack(wps);
1844                 *op_code = WSC_NACK;
1845                 break;
1846         default:
1847                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1848                            "a message", wps->state);
1849                 msg = NULL;
1850                 break;
1851         }
1852
1853         if (*op_code == WSC_MSG && msg) {
1854                 /* Save a copy of the last message for Authenticator derivation
1855                  */
1856                 wpabuf_free(wps->last_msg);
1857                 wps->last_msg = wpabuf_dup(msg);
1858         }
1859
1860         return msg;
1861 }
1862
1863
1864 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1865 {
1866         if (e_nonce == NULL) {
1867                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1868                 return -1;
1869         }
1870
1871         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1872         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1873                     wps->nonce_e, WPS_NONCE_LEN);
1874
1875         return 0;
1876 }
1877
1878
1879 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1880 {
1881         if (r_nonce == NULL) {
1882                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1883                 return -1;
1884         }
1885
1886         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1887                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1888                 return -1;
1889         }
1890
1891         return 0;
1892 }
1893
1894
1895 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1896 {
1897         if (uuid_e == NULL) {
1898                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1899                 return -1;
1900         }
1901
1902         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1903         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1904
1905         return 0;
1906 }
1907
1908
1909 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1910 {
1911         if (pw_id == NULL) {
1912                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1913                 return -1;
1914         }
1915
1916         wps->dev_pw_id = WPA_GET_BE16(pw_id);
1917         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1918
1919         return 0;
1920 }
1921
1922
1923 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
1924 {
1925         if (e_hash1 == NULL) {
1926                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
1927                 return -1;
1928         }
1929
1930         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
1931         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
1932
1933         return 0;
1934 }
1935
1936
1937 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
1938 {
1939         if (e_hash2 == NULL) {
1940                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
1941                 return -1;
1942         }
1943
1944         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
1945         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
1946
1947         return 0;
1948 }
1949
1950
1951 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
1952 {
1953         u8 hash[SHA256_MAC_LEN];
1954         const u8 *addr[4];
1955         size_t len[4];
1956
1957         if (e_snonce1 == NULL) {
1958                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
1959                 return -1;
1960         }
1961
1962         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
1963                         WPS_SECRET_NONCE_LEN);
1964
1965         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
1966         addr[0] = e_snonce1;
1967         len[0] = WPS_SECRET_NONCE_LEN;
1968         addr[1] = wps->psk1;
1969         len[1] = WPS_PSK_LEN;
1970         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1971         len[2] = wpabuf_len(wps->dh_pubkey_e);
1972         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1973         len[3] = wpabuf_len(wps->dh_pubkey_r);
1974         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1975
1976         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
1977                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
1978                            "not match with the pre-committed value");
1979                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
1980                 wps_pwd_auth_fail_event(wps->wps, 0, 1);
1981                 return -1;
1982         }
1983
1984         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
1985                    "half of the device password");
1986
1987         return 0;
1988 }
1989
1990
1991 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
1992 {
1993         u8 hash[SHA256_MAC_LEN];
1994         const u8 *addr[4];
1995         size_t len[4];
1996
1997         if (e_snonce2 == NULL) {
1998                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
1999                 return -1;
2000         }
2001
2002         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2003                         WPS_SECRET_NONCE_LEN);
2004
2005         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2006         addr[0] = e_snonce2;
2007         len[0] = WPS_SECRET_NONCE_LEN;
2008         addr[1] = wps->psk2;
2009         len[1] = WPS_PSK_LEN;
2010         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2011         len[2] = wpabuf_len(wps->dh_pubkey_e);
2012         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2013         len[3] = wpabuf_len(wps->dh_pubkey_r);
2014         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2015
2016         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2017                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2018                            "not match with the pre-committed value");
2019                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2020                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2021                 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2022                 return -1;
2023         }
2024
2025         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2026                    "half of the device password");
2027         wps->wps_pin_revealed = 0;
2028         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2029
2030         return 0;
2031 }
2032
2033
2034 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2035 {
2036         if (mac_addr == NULL) {
2037                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2038                 return -1;
2039         }
2040
2041         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2042                    MAC2STR(mac_addr));
2043         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2044         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2045
2046         return 0;
2047 }
2048
2049
2050 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2051                               size_t pk_len)
2052 {
2053         if (pk == NULL || pk_len == 0) {
2054                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2055                 return -1;
2056         }
2057
2058 #ifdef CONFIG_WPS_OOB
2059         if (wps->wps->oob_conf.pubkey_hash != NULL) {
2060                 const u8 *addr[1];
2061                 u8 hash[WPS_HASH_LEN];
2062
2063                 addr[0] = pk;
2064                 sha256_vector(1, addr, &pk_len, hash);
2065                 if (os_memcmp(hash,
2066                               wpabuf_head(wps->wps->oob_conf.pubkey_hash),
2067                               WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2068                         wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
2069                         return -1;
2070                 }
2071         }
2072 #endif /* CONFIG_WPS_OOB */
2073
2074         wpabuf_free(wps->dh_pubkey_e);
2075         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2076         if (wps->dh_pubkey_e == NULL)
2077                 return -1;
2078
2079         return 0;
2080 }
2081
2082
2083 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2084 {
2085         u16 auth_types;
2086
2087         if (auth == NULL) {
2088                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2089                            "received");
2090                 return -1;
2091         }
2092
2093         auth_types = WPA_GET_BE16(auth);
2094
2095         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2096                    auth_types);
2097         wps->auth_type = wps->wps->auth_types & auth_types;
2098         if (wps->auth_type == 0) {
2099                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2100                            "authentication types (own 0x%x Enrollee 0x%x)",
2101                            wps->wps->auth_types, auth_types);
2102 #ifdef WPS_WORKAROUNDS
2103                 /*
2104                  * Some deployed implementations seem to advertise incorrect
2105                  * information in this attribute. For example, Linksys WRT350N
2106                  * seems to have a byteorder bug that breaks this negotiation.
2107                  * In order to interoperate with existing implementations,
2108                  * assume that the Enrollee supports everything we do.
2109                  */
2110                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2111                            "does not advertise supported authentication types "
2112                            "correctly");
2113                 wps->auth_type = wps->wps->auth_types;
2114 #else /* WPS_WORKAROUNDS */
2115                 return -1;
2116 #endif /* WPS_WORKAROUNDS */
2117         }
2118
2119         return 0;
2120 }
2121
2122
2123 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2124 {
2125         u16 encr_types;
2126
2127         if (encr == NULL) {
2128                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2129                            "received");
2130                 return -1;
2131         }
2132
2133         encr_types = WPA_GET_BE16(encr);
2134
2135         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2136                    encr_types);
2137         wps->encr_type = wps->wps->encr_types & encr_types;
2138         if (wps->encr_type == 0) {
2139                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2140                            "encryption types (own 0x%x Enrollee 0x%x)",
2141                            wps->wps->encr_types, encr_types);
2142 #ifdef WPS_WORKAROUNDS
2143                 /*
2144                  * Some deployed implementations seem to advertise incorrect
2145                  * information in this attribute. For example, Linksys WRT350N
2146                  * seems to have a byteorder bug that breaks this negotiation.
2147                  * In order to interoperate with existing implementations,
2148                  * assume that the Enrollee supports everything we do.
2149                  */
2150                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2151                            "does not advertise supported encryption types "
2152                            "correctly");
2153                 wps->encr_type = wps->wps->encr_types;
2154 #else /* WPS_WORKAROUNDS */
2155                 return -1;
2156 #endif /* WPS_WORKAROUNDS */
2157         }
2158
2159         return 0;
2160 }
2161
2162
2163 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2164 {
2165         if (conn == NULL) {
2166                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2167                            "received");
2168                 return -1;
2169         }
2170
2171         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2172                    *conn);
2173
2174         return 0;
2175 }
2176
2177
2178 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2179 {
2180         u16 m;
2181
2182         if (methods == NULL) {
2183                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2184                 return -1;
2185         }
2186
2187         m = WPA_GET_BE16(methods);
2188
2189         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2190                    "%s%s%s%s%s%s%s%s%s", m,
2191                    m & WPS_CONFIG_USBA ? " [USBA]" : "",
2192                    m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2193                    m & WPS_CONFIG_LABEL ? " [Label]" : "",
2194                    m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2195                    m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2196                    m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2197                    m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2198                    m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2199                    m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2200
2201         if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2202                 /*
2203                  * The Enrollee does not have a display so it is unlikely to be
2204                  * able to show the passphrase to a user and as such, could
2205                  * benefit from receiving PSK to reduce key derivation time.
2206                  */
2207                 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2208                            "Enrollee not supporting display");
2209                 wps->use_psk_key = 1;
2210         }
2211
2212         return 0;
2213 }
2214
2215
2216 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2217 {
2218         if (state == NULL) {
2219                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2220                            "received");
2221                 return -1;
2222         }
2223
2224         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2225                    *state);
2226
2227         return 0;
2228 }
2229
2230
2231 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2232 {
2233         u16 a;
2234
2235         if (assoc == NULL) {
2236                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2237                 return -1;
2238         }
2239
2240         a = WPA_GET_BE16(assoc);
2241         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2242
2243         return 0;
2244 }
2245
2246
2247 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2248 {
2249         u16 e;
2250
2251         if (err == NULL) {
2252                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2253                 return -1;
2254         }
2255
2256         e = WPA_GET_BE16(err);
2257         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2258
2259         return 0;
2260 }
2261
2262
2263 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2264                                            struct wps_parse_attr *attr)
2265 {
2266         wpa_printf(MSG_DEBUG, "WPS: Received M1");
2267
2268         if (wps->state != RECV_M1) {
2269                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2270                            "receiving M1", wps->state);
2271                 return WPS_FAILURE;
2272         }
2273
2274         if (wps_process_uuid_e(wps, attr->uuid_e) ||
2275             wps_process_mac_addr(wps, attr->mac_addr) ||
2276             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2277             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2278             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2279             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2280             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2281             wps_process_config_methods(wps, attr->config_methods) ||
2282             wps_process_wps_state(wps, attr->wps_state) ||
2283             wps_process_device_attrs(&wps->peer_dev, attr) ||
2284             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2285             wps_process_assoc_state(wps, attr->assoc_state) ||
2286             wps_process_dev_password_id(wps, attr->dev_password_id) ||
2287             wps_process_config_error(wps, attr->config_error) ||
2288             wps_process_os_version(&wps->peer_dev, attr->os_version))
2289                 return WPS_FAILURE;
2290
2291         if (wps->dev_pw_id < 0x10 &&
2292             wps->dev_pw_id != DEV_PW_DEFAULT &&
2293             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2294             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2295             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2296             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2297              !wps->wps->registrar->pbc)) {
2298                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2299                            wps->dev_pw_id);
2300                 wps->state = SEND_M2D;
2301                 return WPS_CONTINUE;
2302         }
2303
2304 #ifdef CONFIG_WPS_OOB
2305         if (wps->dev_pw_id >= 0x10 &&
2306             wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2307                 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2308                            "%d mismatch", wps->dev_pw_id);
2309                 wps->state = SEND_M2D;
2310                 return WPS_CONTINUE;
2311         }
2312 #endif /* CONFIG_WPS_OOB */
2313
2314         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2315                 if (wps->wps->registrar->force_pbc_overlap ||
2316                     wps_registrar_pbc_overlap(wps->wps->registrar,
2317                                               wps->mac_addr_e, wps->uuid_e)) {
2318                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2319                                    "negotiation");
2320                         wps->state = SEND_M2D;
2321                         wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2322                         wps_pbc_overlap_event(wps->wps);
2323                         wps->wps->registrar->force_pbc_overlap = 1;
2324                         return WPS_CONTINUE;
2325                 }
2326                 wps_registrar_add_pbc_session(wps->wps->registrar,
2327                                               wps->mac_addr_e, wps->uuid_e);
2328                 wps->pbc = 1;
2329         }
2330
2331 #ifdef WPS_WORKAROUNDS
2332         /*
2333          * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2334          * passphrase format. To avoid interop issues, force PSK format to be
2335          * used.
2336          */
2337         if (!wps->use_psk_key &&
2338             wps->peer_dev.manufacturer &&
2339             os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2340             wps->peer_dev.model_name &&
2341             os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2342                 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2343                            "PSK format");
2344                 wps->use_psk_key = 1;
2345         }
2346 #endif /* WPS_WORKAROUNDS */
2347
2348         wps->state = SEND_M2;
2349         return WPS_CONTINUE;
2350 }
2351
2352
2353 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2354                                            const struct wpabuf *msg,
2355                                            struct wps_parse_attr *attr)
2356 {
2357         wpa_printf(MSG_DEBUG, "WPS: Received M3");
2358
2359         if (wps->state != RECV_M3) {
2360                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2361                            "receiving M3", wps->state);
2362                 wps->state = SEND_WSC_NACK;
2363                 return WPS_CONTINUE;
2364         }
2365
2366         if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2367                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2368                            "session overlap");
2369                 wps->state = SEND_WSC_NACK;
2370                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2371                 return WPS_CONTINUE;
2372         }
2373
2374         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2375             wps_process_authenticator(wps, attr->authenticator, msg) ||
2376             wps_process_e_hash1(wps, attr->e_hash1) ||
2377             wps_process_e_hash2(wps, attr->e_hash2)) {
2378                 wps->state = SEND_WSC_NACK;
2379                 return WPS_CONTINUE;
2380         }
2381
2382         wps->state = SEND_M4;
2383         return WPS_CONTINUE;
2384 }
2385
2386
2387 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2388                                            const struct wpabuf *msg,
2389                                            struct wps_parse_attr *attr)
2390 {
2391         struct wpabuf *decrypted;
2392         struct wps_parse_attr eattr;
2393
2394         wpa_printf(MSG_DEBUG, "WPS: Received M5");
2395
2396         if (wps->state != RECV_M5) {
2397                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2398                            "receiving M5", wps->state);
2399                 wps->state = SEND_WSC_NACK;
2400                 return WPS_CONTINUE;
2401         }
2402
2403         if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2404                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2405                            "session overlap");
2406                 wps->state = SEND_WSC_NACK;
2407                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2408                 return WPS_CONTINUE;
2409         }
2410
2411         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2412             wps_process_authenticator(wps, attr->authenticator, msg)) {
2413                 wps->state = SEND_WSC_NACK;
2414                 return WPS_CONTINUE;
2415         }
2416
2417         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2418                                               attr->encr_settings_len);
2419         if (decrypted == NULL) {
2420                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2421                            "Settings attribute");
2422                 wps->state = SEND_WSC_NACK;
2423                 return WPS_CONTINUE;
2424         }
2425
2426         if (wps_validate_m5_encr(decrypted) < 0) {
2427                 wpabuf_free(decrypted);
2428                 wps->state = SEND_WSC_NACK;
2429                 return WPS_CONTINUE;
2430         }
2431
2432         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2433                    "attribute");
2434         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2435             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2436             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2437                 wpabuf_free(decrypted);
2438                 wps->state = SEND_WSC_NACK;
2439                 return WPS_CONTINUE;
2440         }
2441         wpabuf_free(decrypted);
2442
2443         wps->state = SEND_M6;
2444         return WPS_CONTINUE;
2445 }
2446
2447
2448 static void wps_sta_cred_cb(struct wps_data *wps)
2449 {
2450         /*
2451          * Update credential to only include a single authentication and
2452          * encryption type in case the AP configuration includes more than one
2453          * option.
2454          */
2455         if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2456                 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2457         else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2458                 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2459         if (wps->cred.encr_type & WPS_ENCR_AES)
2460                 wps->cred.encr_type = WPS_ENCR_AES;
2461         else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2462                 wps->cred.encr_type = WPS_ENCR_TKIP;
2463         wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2464                    "AP configuration");
2465         if (wps->wps->cred_cb)
2466                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2467 }
2468
2469
2470 static void wps_cred_update(struct wps_credential *dst,
2471                             struct wps_credential *src)
2472 {
2473         os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2474         dst->ssid_len = src->ssid_len;
2475         dst->auth_type = src->auth_type;
2476         dst->encr_type = src->encr_type;
2477         dst->key_idx = src->key_idx;
2478         os_memcpy(dst->key, src->key, sizeof(dst->key));
2479         dst->key_len = src->key_len;
2480 }
2481
2482
2483 static int wps_process_ap_settings_r(struct wps_data *wps,
2484                                      struct wps_parse_attr *attr)
2485 {
2486         if (wps->wps->ap || wps->er)
2487                 return 0;
2488
2489         /* AP Settings Attributes in M7 when Enrollee is an AP */
2490         if (wps_process_ap_settings(attr, &wps->cred) < 0)
2491                 return -1;
2492
2493         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2494
2495         if (wps->new_ap_settings) {
2496                 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2497                            "new settings");
2498                 wps_cred_update(&wps->cred, wps->new_ap_settings);
2499                 return 0;
2500         } else {
2501                 /*
2502                  * Use the AP PIN only to receive the current AP settings, not
2503                  * to reconfigure the AP.
2504                  */
2505                 if (wps->ap_settings_cb) {
2506                         wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2507                                             &wps->cred);
2508                         return 1;
2509                 }
2510                 wps_sta_cred_cb(wps);
2511                 return 1;
2512         }
2513 }
2514
2515
2516 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2517                                            const struct wpabuf *msg,
2518                                            struct wps_parse_attr *attr)
2519 {
2520         struct wpabuf *decrypted;
2521         struct wps_parse_attr eattr;
2522
2523         wpa_printf(MSG_DEBUG, "WPS: Received M7");
2524
2525         if (wps->state != RECV_M7) {
2526                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2527                            "receiving M7", wps->state);
2528                 wps->state = SEND_WSC_NACK;
2529                 return WPS_CONTINUE;
2530         }
2531
2532         if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2533                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2534                            "session overlap");
2535                 wps->state = SEND_WSC_NACK;
2536                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2537                 return WPS_CONTINUE;
2538         }
2539
2540         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2541             wps_process_authenticator(wps, attr->authenticator, msg)) {
2542                 wps->state = SEND_WSC_NACK;
2543                 return WPS_CONTINUE;
2544         }
2545
2546         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2547                                               attr->encr_settings_len);
2548         if (decrypted == NULL) {
2549                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2550                            "Settings attribute");
2551                 wps->state = SEND_WSC_NACK;
2552                 return WPS_CONTINUE;
2553         }
2554
2555         if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er) < 0) {
2556                 wpabuf_free(decrypted);
2557                 wps->state = SEND_WSC_NACK;
2558                 return WPS_CONTINUE;
2559         }
2560
2561         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2562                    "attribute");
2563         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2564             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2565             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2566             wps_process_ap_settings_r(wps, &eattr)) {
2567                 wpabuf_free(decrypted);
2568                 wps->state = SEND_WSC_NACK;
2569                 return WPS_CONTINUE;
2570         }
2571
2572         wpabuf_free(decrypted);
2573
2574         wps->state = SEND_M8;
2575         return WPS_CONTINUE;
2576 }
2577
2578
2579 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2580                                                 const struct wpabuf *msg)
2581 {
2582         struct wps_parse_attr attr;
2583         enum wps_process_res ret = WPS_CONTINUE;
2584
2585         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2586
2587         if (wps_parse_msg(msg, &attr) < 0)
2588                 return WPS_FAILURE;
2589
2590         if (attr.msg_type == NULL) {
2591                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2592                 return WPS_FAILURE;
2593         }
2594
2595         if (*attr.msg_type != WPS_M1 &&
2596             (attr.registrar_nonce == NULL ||
2597              os_memcmp(wps->nonce_r, attr.registrar_nonce,
2598                        WPS_NONCE_LEN != 0))) {
2599                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2600                 return WPS_FAILURE;
2601         }
2602
2603         switch (*attr.msg_type) {
2604         case WPS_M1:
2605                 if (wps_validate_m1(msg) < 0)
2606                         return WPS_FAILURE;
2607 #ifdef CONFIG_WPS_UPNP
2608                 if (wps->wps->wps_upnp && attr.mac_addr) {
2609                         /* Remove old pending messages when starting new run */
2610                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2611                         wps->wps->upnp_msgs = NULL;
2612
2613                         upnp_wps_device_send_wlan_event(
2614                                 wps->wps->wps_upnp, attr.mac_addr,
2615                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2616                 }
2617 #endif /* CONFIG_WPS_UPNP */
2618                 ret = wps_process_m1(wps, &attr);
2619                 break;
2620         case WPS_M3:
2621                 if (wps_validate_m3(msg) < 0)
2622                         return WPS_FAILURE;
2623                 ret = wps_process_m3(wps, msg, &attr);
2624                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2625                         wps_fail_event(wps->wps, WPS_M3);
2626                 break;
2627         case WPS_M5:
2628                 if (wps_validate_m5(msg) < 0)
2629                         return WPS_FAILURE;
2630                 ret = wps_process_m5(wps, msg, &attr);
2631                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2632                         wps_fail_event(wps->wps, WPS_M5);
2633                 break;
2634         case WPS_M7:
2635                 if (wps_validate_m7(msg) < 0)
2636                         return WPS_FAILURE;
2637                 ret = wps_process_m7(wps, msg, &attr);
2638                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2639                         wps_fail_event(wps->wps, WPS_M7);
2640                 break;
2641         default:
2642                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2643                            *attr.msg_type);
2644                 return WPS_FAILURE;
2645         }
2646
2647         if (ret == WPS_CONTINUE) {
2648                 /* Save a copy of the last message for Authenticator derivation
2649                  */
2650                 wpabuf_free(wps->last_msg);
2651                 wps->last_msg = wpabuf_dup(msg);
2652         }
2653
2654         return ret;
2655 }
2656
2657
2658 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2659                                                 const struct wpabuf *msg)
2660 {
2661         struct wps_parse_attr attr;
2662
2663         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2664
2665         if (wps_parse_msg(msg, &attr) < 0)
2666                 return WPS_FAILURE;
2667
2668         if (attr.msg_type == NULL) {
2669                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2670                 return WPS_FAILURE;
2671         }
2672
2673         if (*attr.msg_type != WPS_WSC_ACK) {
2674                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2675                            *attr.msg_type);
2676                 return WPS_FAILURE;
2677         }
2678
2679 #ifdef CONFIG_WPS_UPNP
2680         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2681             upnp_wps_subscribers(wps->wps->wps_upnp)) {
2682                 if (wps->wps->upnp_msgs)
2683                         return WPS_CONTINUE;
2684                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2685                            "external Registrar");
2686                 return WPS_PENDING;
2687         }
2688 #endif /* CONFIG_WPS_UPNP */
2689
2690         if (attr.registrar_nonce == NULL ||
2691             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2692         {
2693                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2694                 return WPS_FAILURE;
2695         }
2696
2697         if (attr.enrollee_nonce == NULL ||
2698             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2699                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2700                 return WPS_FAILURE;
2701         }
2702
2703         if (wps->state == RECV_M2D_ACK) {
2704 #ifdef CONFIG_WPS_UPNP
2705                 if (wps->wps->wps_upnp &&
2706                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
2707                         if (wps->wps->upnp_msgs)
2708                                 return WPS_CONTINUE;
2709                         if (wps->ext_reg == 0)
2710                                 wps->ext_reg = 1;
2711                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2712                                    "external Registrar");
2713                         return WPS_PENDING;
2714                 }
2715 #endif /* CONFIG_WPS_UPNP */
2716
2717                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2718                            "terminate negotiation");
2719         }
2720
2721         return WPS_FAILURE;
2722 }
2723
2724
2725 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2726                                                  const struct wpabuf *msg)
2727 {
2728         struct wps_parse_attr attr;
2729         int old_state;
2730
2731         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2732
2733         old_state = wps->state;
2734         wps->state = SEND_WSC_NACK;
2735
2736         if (wps_parse_msg(msg, &attr) < 0)
2737                 return WPS_FAILURE;
2738
2739         if (attr.msg_type == NULL) {
2740                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2741                 return WPS_FAILURE;
2742         }
2743
2744         if (*attr.msg_type != WPS_WSC_NACK) {
2745                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2746                            *attr.msg_type);
2747                 return WPS_FAILURE;
2748         }
2749
2750 #ifdef CONFIG_WPS_UPNP
2751         if (wps->wps->wps_upnp && wps->ext_reg) {
2752                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2753                            "Registrar terminated by the Enrollee");
2754                 return WPS_FAILURE;
2755         }
2756 #endif /* CONFIG_WPS_UPNP */
2757
2758         if (attr.registrar_nonce == NULL ||
2759             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2760         {
2761                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2762                 return WPS_FAILURE;
2763         }
2764
2765         if (attr.enrollee_nonce == NULL ||
2766             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2767                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2768                 return WPS_FAILURE;
2769         }
2770
2771         if (attr.config_error == NULL) {
2772                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2773                            "in WSC_NACK");
2774                 return WPS_FAILURE;
2775         }
2776
2777         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2778                    "Configuration Error %d", WPA_GET_BE16(attr.config_error));
2779
2780         switch (old_state) {
2781         case RECV_M3:
2782                 wps_fail_event(wps->wps, WPS_M2);
2783                 break;
2784         case RECV_M5:
2785                 wps_fail_event(wps->wps, WPS_M4);
2786                 break;
2787         case RECV_M7:
2788                 wps_fail_event(wps->wps, WPS_M6);
2789                 break;
2790         case RECV_DONE:
2791                 wps_fail_event(wps->wps, WPS_M8);
2792                 break;
2793         default:
2794                 break;
2795         }
2796
2797         return WPS_FAILURE;
2798 }
2799
2800
2801 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2802                                                  const struct wpabuf *msg)
2803 {
2804         struct wps_parse_attr attr;
2805
2806         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2807
2808         if (wps->state != RECV_DONE &&
2809             (!wps->wps->wps_upnp || !wps->ext_reg)) {
2810                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2811                            "receiving WSC_Done", wps->state);
2812                 return WPS_FAILURE;
2813         }
2814
2815         if (wps_parse_msg(msg, &attr) < 0)
2816                 return WPS_FAILURE;
2817
2818         if (attr.msg_type == NULL) {
2819                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2820                 return WPS_FAILURE;
2821         }
2822
2823         if (*attr.msg_type != WPS_WSC_DONE) {
2824                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2825                            *attr.msg_type);
2826                 return WPS_FAILURE;
2827         }
2828
2829 #ifdef CONFIG_WPS_UPNP
2830         if (wps->wps->wps_upnp && wps->ext_reg) {
2831                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2832                            "Registrar completed successfully");
2833                 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2834                                  wps->uuid_e);
2835                 return WPS_DONE;
2836         }
2837 #endif /* CONFIG_WPS_UPNP */
2838
2839         if (attr.registrar_nonce == NULL ||
2840             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2841         {
2842                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2843                 return WPS_FAILURE;
2844         }
2845
2846         if (attr.enrollee_nonce == NULL ||
2847             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2848                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2849                 return WPS_FAILURE;
2850         }
2851
2852         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
2853         wps_device_store(wps->wps->registrar, &wps->peer_dev,
2854                          wps->uuid_e);
2855
2856         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
2857             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
2858                 struct wps_credential cred;
2859
2860                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
2861                            "on first Enrollee connection");
2862
2863                 os_memset(&cred, 0, sizeof(cred));
2864                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
2865                 cred.ssid_len = wps->wps->ssid_len;
2866                 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
2867                 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
2868                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
2869                 cred.key_len = wps->new_psk_len;
2870
2871                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
2872                 wpa_hexdump_ascii_key(MSG_DEBUG,
2873                                       "WPS: Generated random passphrase",
2874                                       wps->new_psk, wps->new_psk_len);
2875                 if (wps->wps->cred_cb)
2876                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
2877
2878                 os_free(wps->new_psk);
2879                 wps->new_psk = NULL;
2880         }
2881
2882         if (!wps->wps->ap && !wps->er)
2883                 wps_sta_cred_cb(wps);
2884
2885         if (wps->new_psk) {
2886                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
2887                                    wps->new_psk, wps->new_psk_len)) {
2888                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
2889                                    "new PSK");
2890                 }
2891                 os_free(wps->new_psk);
2892                 wps->new_psk = NULL;
2893         }
2894
2895         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
2896
2897         if (wps->pbc) {
2898                 wps_registrar_remove_pbc_session(wps->wps->registrar,
2899                                                  wps->mac_addr_e, wps->uuid_e);
2900                 wps_registrar_pbc_completed(wps->wps->registrar);
2901         } else {
2902                 wps_registrar_pin_completed(wps->wps->registrar);
2903         }
2904         /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
2905          * merge them into APs own list.. */
2906
2907         wps_success_event(wps->wps);
2908
2909         return WPS_DONE;
2910 }
2911
2912
2913 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
2914                                                enum wsc_op_code op_code,
2915                                                const struct wpabuf *msg)
2916 {
2917         enum wps_process_res ret;
2918
2919         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
2920                    "op_code=%d)",
2921                    (unsigned long) wpabuf_len(msg), op_code);
2922
2923 #ifdef CONFIG_WPS_UPNP
2924         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
2925                 struct wps_parse_attr attr;
2926                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
2927                     *attr.msg_type == WPS_M3)
2928                         wps->ext_reg = 2; /* past M2/M2D phase */
2929         }
2930         if (wps->ext_reg > 1)
2931                 wps_registrar_free_pending_m2(wps->wps);
2932         if (wps->wps->wps_upnp && wps->ext_reg &&
2933             wps->wps->upnp_msgs == NULL &&
2934             (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
2935         {
2936                 struct wps_parse_attr attr;
2937                 int type;
2938                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
2939                         type = -1;
2940                 else
2941                         type = *attr.msg_type;
2942                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
2943                            " to external Registrar for processing", type);
2944                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
2945                                                 wps->mac_addr_e,
2946                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
2947                                                 msg);
2948                 if (op_code == WSC_MSG)
2949                         return WPS_PENDING;
2950         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
2951                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
2952                            "external Registrar");
2953                 return WPS_CONTINUE;
2954         }
2955 #endif /* CONFIG_WPS_UPNP */
2956
2957         switch (op_code) {
2958         case WSC_MSG:
2959                 return wps_process_wsc_msg(wps, msg);
2960         case WSC_ACK:
2961                 if (wps_validate_wsc_ack(msg) < 0)
2962                         return WPS_FAILURE;
2963                 return wps_process_wsc_ack(wps, msg);
2964         case WSC_NACK:
2965                 if (wps_validate_wsc_nack(msg) < 0)
2966                         return WPS_FAILURE;
2967                 return wps_process_wsc_nack(wps, msg);
2968         case WSC_Done:
2969                 if (wps_validate_wsc_done(msg) < 0)
2970                         return WPS_FAILURE;
2971                 ret = wps_process_wsc_done(wps, msg);
2972                 if (ret == WPS_FAILURE) {
2973                         wps->state = SEND_WSC_NACK;
2974                         wps_fail_event(wps->wps, WPS_WSC_DONE);
2975                 }
2976                 return ret;
2977         default:
2978                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
2979                 return WPS_FAILURE;
2980         }
2981 }
2982
2983
2984 int wps_registrar_update_ie(struct wps_registrar *reg)
2985 {
2986         return wps_set_ie(reg);
2987 }
2988
2989
2990 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
2991                                                void *timeout_ctx)
2992 {
2993         struct wps_registrar *reg = eloop_ctx;
2994
2995         wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
2996                    "unselect internal Registrar");
2997         reg->selected_registrar = 0;
2998         reg->pbc = 0;
2999         wps_registrar_selected_registrar_changed(reg);
3000 }
3001
3002
3003 #ifdef CONFIG_WPS_UPNP
3004 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3005                                       struct subscription *s)
3006 {
3007         int i, j;
3008         wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3009                    "config_methods=0x%x)",
3010                    s->dev_password_id, s->config_methods);
3011         reg->sel_reg_union = 1;
3012         if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3013                 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3014         if (reg->sel_reg_config_methods_override == -1)
3015                 reg->sel_reg_config_methods_override = 0;
3016         reg->sel_reg_config_methods_override |= s->config_methods;
3017         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3018                 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3019                         break;
3020         for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3021              j++) {
3022                 if (is_zero_ether_addr(s->authorized_macs[j]))
3023                         break;
3024                 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3025                            MACSTR, MAC2STR(s->authorized_macs[j]));
3026                 os_memcpy(reg->authorized_macs_union[i],
3027                           s->authorized_macs[j], ETH_ALEN);
3028                 i++;
3029         }
3030         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3031                     (u8 *) reg->authorized_macs_union,
3032                     sizeof(reg->authorized_macs_union));
3033 }
3034 #endif /* CONFIG_WPS_UPNP */
3035
3036
3037 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3038 {
3039 #ifdef CONFIG_WPS_UPNP
3040         struct subscription *s;
3041
3042         if (reg->wps->wps_upnp == NULL)
3043                 return;
3044
3045         dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3046                          struct subscription, list) {
3047                 struct subscr_addr *sa;
3048                 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3049                 if (sa) {
3050                         wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3051                                    inet_ntoa(sa->saddr.sin_addr),
3052                                    ntohs(sa->saddr.sin_port));
3053                 }
3054                 if (s->selected_registrar)
3055                         wps_registrar_sel_reg_add(reg, s);
3056                 else
3057                         wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3058                                    "selected");
3059         }
3060 #endif /* CONFIG_WPS_UPNP */
3061 }
3062
3063
3064 /**
3065  * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3066  * @reg: Registrar data from wps_registrar_init()
3067  *
3068  * This function is called when selected registrar state changes, e.g., when an
3069  * AP receives a SetSelectedRegistrar UPnP message.
3070  */
3071 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3072 {
3073         wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3074
3075         reg->sel_reg_union = reg->selected_registrar;
3076         reg->sel_reg_dev_password_id_override = -1;
3077         reg->sel_reg_config_methods_override = -1;
3078         os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3079                   WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3080         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3081                     (u8 *) reg->authorized_macs_union,
3082                     sizeof(reg->authorized_macs_union));
3083         if (reg->selected_registrar) {
3084                 u16 methods;
3085
3086                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3087 #ifdef CONFIG_WPS2
3088                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3089                              WPS_CONFIG_PHY_PUSHBUTTON);
3090 #endif /* CONFIG_WPS2 */
3091                 if (reg->pbc) {
3092                         reg->sel_reg_dev_password_id_override =
3093                                 DEV_PW_PUSHBUTTON;
3094                         wps_set_pushbutton(&methods, reg->wps->config_methods);
3095                 }
3096                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3097                            "(pbc=%d)", reg->pbc);
3098                 reg->sel_reg_config_methods_override = methods;
3099         } else
3100                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3101
3102         wps_registrar_sel_reg_union(reg);
3103
3104         wps_set_ie(reg);
3105         wps_cb_set_sel_reg(reg);
3106 }
3107
3108
3109 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3110                            char *buf, size_t buflen)
3111 {
3112         struct wps_registrar_device *d;
3113         int len = 0, ret;
3114         char uuid[40];
3115         char devtype[WPS_DEV_TYPE_BUFSIZE];
3116
3117         d = wps_device_get(reg, addr);
3118         if (d == NULL)
3119                 return 0;
3120         if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3121                 return 0;
3122
3123         ret = os_snprintf(buf + len, buflen - len,
3124                           "wpsUuid=%s\n"
3125                           "wpsPrimaryDeviceType=%s\n"
3126                           "wpsDeviceName=%s\n"
3127                           "wpsManufacturer=%s\n"
3128                           "wpsModelName=%s\n"
3129                           "wpsModelNumber=%s\n"
3130                           "wpsSerialNumber=%s\n",
3131                           uuid,
3132                           wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3133                                                sizeof(devtype)),
3134                           d->dev.device_name ? d->dev.device_name : "",
3135                           d->dev.manufacturer ? d->dev.manufacturer : "",
3136                           d->dev.model_name ? d->dev.model_name : "",
3137                           d->dev.model_number ? d->dev.model_number : "",
3138                           d->dev.serial_number ? d->dev.serial_number : "");
3139         if (ret < 0 || (size_t) ret >= buflen - len)
3140                 return len;
3141         len += ret;
3142
3143         return len;
3144 }