src/wps/wps_registrar.c

   1 /*
   2  * Wi-Fi Protected Setup - Registrar
   3  * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/base64.h"
  13 #include "utils/eloop.h"
  14 #include "utils/uuid.h"
  15 #include "utils/list.h"
  16 #include "crypto/crypto.h"
  17 #include "crypto/sha256.h"
  18 #include "crypto/random.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "wps_i.h"
  21 #include "wps_dev_attr.h"
  22 #include "wps_upnp.h"
  23 #include "wps_upnp_i.h"
  24
  25 #ifndef CONFIG_WPS_STRICT
  26 #define WPS_WORKAROUNDS
  27 #endif /* CONFIG_WPS_STRICT */
  28
  29 #ifdef CONFIG_WPS_NFC
  30
  31 struct wps_nfc_pw_token {
  32         struct dl_list list;
  33         u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
  34         u16 pw_id;
  35         u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN];
  36         size_t dev_pw_len;
  37 };
  38
  39
  40 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
  41 {
  42         dl_list_del(&token->list);
  43         os_free(token);
  44 }
  45
  46
  47 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
  48 {
  49         struct wps_nfc_pw_token *token, *prev;
  50         dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
  51                               list) {
  52                 if (pw_id == 0 || pw_id == token->pw_id)
  53                         wps_remove_nfc_pw_token(token);
  54         }
  55 }
  56
  57
  58 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
  59                                                       u16 pw_id)
  60 {
  61         struct wps_nfc_pw_token *token;
  62         dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
  63                 if (pw_id == token->pw_id)
  64                         return token;
  65         }
  66         return NULL;
  67 }
  68
  69 #else /* CONFIG_WPS_NFC */
  70
  71 #define wps_free_nfc_pw_tokens(t, p) do { } while (0)
  72
  73 #endif /* CONFIG_WPS_NFC */
  74
  75
  76 struct wps_uuid_pin {
  77         struct dl_list list;
  78         u8 uuid[WPS_UUID_LEN];
  79         int wildcard_uuid;
  80         u8 *pin;
  81         size_t pin_len;
  82 #define PIN_LOCKED BIT(0)
  83 #define PIN_EXPIRES BIT(1)
  84         int flags;
  85         struct os_time expiration;
  86         u8 enrollee_addr[ETH_ALEN];
  87 };
  88
  89
  90 static void wps_free_pin(struct wps_uuid_pin *pin)
  91 {
  92         os_free(pin->pin);
  93         os_free(pin);
  94 }
  95
  96
  97 static void wps_remove_pin(struct wps_uuid_pin *pin)
  98 {
  99         dl_list_del(&pin->list);
 100         wps_free_pin(pin);
 101 }
 102
 103
 104 static void wps_free_pins(struct dl_list *pins)
 105 {
 106         struct wps_uuid_pin *pin, *prev;
 107         dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
 108                 wps_remove_pin(pin);
 109 }
 110
 111
 112 struct wps_pbc_session {
 113         struct wps_pbc_session *next;
 114         u8 addr[ETH_ALEN];
 115         u8 uuid_e[WPS_UUID_LEN];
 116         struct os_time timestamp;
 117 };
 118
 119
 120 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
 121 {
 122         struct wps_pbc_session *prev;
 123
 124         while (pbc) {
 125                 prev = pbc;
 126                 pbc = pbc->next;
 127                 os_free(prev);
 128         }
 129 }
 130
 131
 132 struct wps_registrar_device {
 133         struct wps_registrar_device *next;
 134         struct wps_device_data dev;
 135         u8 uuid[WPS_UUID_LEN];
 136 };
 137
 138
 139 struct wps_registrar {
 140         struct wps_context *wps;
 141
 142         int pbc;
 143         int selected_registrar;
 144
 145         int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
 146                           size_t psk_len);
 147         int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
 148                          struct wpabuf *probe_resp_ie);
 149         void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
 150                               const struct wps_device_data *dev);
 151         void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
 152                                const u8 *uuid_e, const u8 *dev_pw,
 153                                size_t dev_pw_len);
 154         void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
 155                                u16 sel_reg_config_methods);
 156         void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
 157                                  const u8 *pri_dev_type, u16 config_methods,
 158                                  u16 dev_password_id, u8 request_type,
 159                                  const char *dev_name);
 160         void *cb_ctx;
 161
 162         struct dl_list pins;
 163         struct dl_list nfc_pw_tokens;
 164         struct wps_pbc_session *pbc_sessions;
 165
 166         int skip_cred_build;
 167         struct wpabuf *extra_cred;
 168         int disable_auto_conf;
 169         int sel_reg_union;
 170         int sel_reg_dev_password_id_override;
 171         int sel_reg_config_methods_override;
 172         int static_wep_only;
 173         int dualband;
 174
 175         struct wps_registrar_device *devices;
 176
 177         int force_pbc_overlap;
 178
 179         u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 180         u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 181
 182         u8 p2p_dev_addr[ETH_ALEN];
 183
 184         u8 pbc_ignore_uuid[WPS_UUID_LEN];
 185         struct os_time pbc_ignore_start;
 186 };
 187
 188
 189 static int wps_set_ie(struct wps_registrar *reg);
 190 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
 191 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
 192                                                void *timeout_ctx);
 193 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 194                                      struct wps_uuid_pin *pin);
 195
 196
 197 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
 198                                              const u8 *addr)
 199 {
 200         int i;
 201         wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
 202                    MAC2STR(addr));
 203         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
 204                 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
 205                         wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
 206                                    "already in the list");
 207                         return; /* already in list */
 208                 }
 209         for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
 210                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
 211                           ETH_ALEN);
 212         os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
 213         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 214                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 215 }
 216
 217
 218 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
 219                                                 const u8 *addr)
 220 {
 221         int i;
 222         wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
 223                    MAC2STR(addr));
 224         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
 225                 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
 226                         break;
 227         }
 228         if (i == WPS_MAX_AUTHORIZED_MACS) {
 229                 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
 230                            "list");
 231                 return; /* not in the list */
 232         }
 233         for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
 234                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
 235                           ETH_ALEN);
 236         os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
 237                   ETH_ALEN);
 238         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 239                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 240 }
 241
 242
 243 static void wps_free_devices(struct wps_registrar_device *dev)
 244 {
 245         struct wps_registrar_device *prev;
 246
 247         while (dev) {
 248                 prev = dev;
 249                 dev = dev->next;
 250                 wps_device_data_free(&prev->dev);
 251                 os_free(prev);
 252         }
 253 }
 254
 255
 256 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
 257                                                     const u8 *addr)
 258 {
 259         struct wps_registrar_device *dev;
 260
 261         for (dev = reg->devices; dev; dev = dev->next) {
 262                 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
 263                         return dev;
 264         }
 265         return NULL;
 266 }
 267
 268
 269 static void wps_device_clone_data(struct wps_device_data *dst,
 270                                   struct wps_device_data *src)
 271 {
 272         os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
 273         os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
 274
 275 #define WPS_STRDUP(n) \
 276         os_free(dst->n); \
 277         dst->n = src->n ? os_strdup(src->n) : NULL
 278
 279         WPS_STRDUP(device_name);
 280         WPS_STRDUP(manufacturer);
 281         WPS_STRDUP(model_name);
 282         WPS_STRDUP(model_number);
 283         WPS_STRDUP(serial_number);
 284 #undef WPS_STRDUP
 285 }
 286
 287
 288 int wps_device_store(struct wps_registrar *reg,
 289                      struct wps_device_data *dev, const u8 *uuid)
 290 {
 291         struct wps_registrar_device *d;
 292
 293         d = wps_device_get(reg, dev->mac_addr);
 294         if (d == NULL) {
 295                 d = os_zalloc(sizeof(*d));
 296                 if (d == NULL)
 297                         return -1;
 298                 d->next = reg->devices;
 299                 reg->devices = d;
 300         }
 301
 302         wps_device_clone_data(&d->dev, dev);
 303         os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
 304
 305         return 0;
 306 }
 307
 308
 309 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
 310                                           const u8 *addr, const u8 *uuid_e)
 311 {
 312         struct wps_pbc_session *pbc, *prev = NULL;
 313         struct os_time now;
 314
 315         os_get_time(&now);
 316
 317         pbc = reg->pbc_sessions;
 318         while (pbc) {
 319                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 320                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 321                         if (prev)
 322                                 prev->next = pbc->next;
 323                         else
 324                                 reg->pbc_sessions = pbc->next;
 325                         break;
 326                 }
 327                 prev = pbc;
 328                 pbc = pbc->next;
 329         }
 330
 331         if (!pbc) {
 332                 pbc = os_zalloc(sizeof(*pbc));
 333                 if (pbc == NULL)
 334                         return;
 335                 os_memcpy(pbc->addr, addr, ETH_ALEN);
 336                 if (uuid_e)
 337                         os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
 338         }
 339
 340         pbc->next = reg->pbc_sessions;
 341         reg->pbc_sessions = pbc;
 342         pbc->timestamp = now;
 343
 344         /* remove entries that have timed out */
 345         prev = pbc;
 346         pbc = pbc->next;
 347
 348         while (pbc) {
 349                 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
 350                         prev->next = NULL;
 351                         wps_free_pbc_sessions(pbc);
 352                         break;
 353                 }
 354                 prev = pbc;
 355                 pbc = pbc->next;
 356         }
 357 }
 358
 359
 360 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
 361                                              const u8 *uuid_e,
 362                                              const u8 *p2p_dev_addr)
 363 {
 364         struct wps_pbc_session *pbc, *prev = NULL, *tmp;
 365
 366         pbc = reg->pbc_sessions;
 367         while (pbc) {
 368                 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
 369 #ifdef ANDROID_P2P
 370                     (p2p_dev_addr && !is_zero_ether_addr(pbc->addr) &&
 371                      os_memcmp(pbc->addr, p2p_dev_addr, ETH_ALEN) ==
 372 #else
 373                     (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
 374                      os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
 375 #endif
 376                      0)) {
 377                         if (prev)
 378                                 prev->next = pbc->next;
 379                         else
 380                                 reg->pbc_sessions = pbc->next;
 381                         tmp = pbc;
 382                         pbc = pbc->next;
 383                         wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
 384                                    "addr=" MACSTR, MAC2STR(tmp->addr));
 385                         wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
 386                                     tmp->uuid_e, WPS_UUID_LEN);
 387                         os_free(tmp);
 388                         continue;
 389                 }
 390                 prev = pbc;
 391                 pbc = pbc->next;
 392         }
 393 }
 394
 395
 396 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
 397                               const u8 *addr, const u8 *uuid_e)
 398 {
 399         int count = 0;
 400         struct wps_pbc_session *pbc;
 401         struct wps_pbc_session *first = NULL;
 402         struct os_time now;
 403
 404         os_get_time(&now);
 405
 406         wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
 407
 408         if (uuid_e) {
 409                 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
 410                 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
 411                             uuid_e, WPS_UUID_LEN);
 412                 count++;
 413         }
 414
 415         for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
 416                 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
 417                            MAC2STR(pbc->addr));
 418                 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
 419                             pbc->uuid_e, WPS_UUID_LEN);
 420                 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
 421                         wpa_printf(MSG_DEBUG, "WPS: PBC walk time has "
 422                                    "expired");
 423                         break;
 424                 }
 425                 if (first &&
 426                     os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
 427                         wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
 428                         continue; /* same Enrollee */
 429                 }
 430                 if (uuid_e == NULL ||
 431                     os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
 432                         wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
 433                         count++;
 434                 }
 435                 if (first == NULL)
 436                         first = pbc;
 437         }
 438
 439         wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
 440
 441         return count > 1 ? 1 : 0;
 442 }
 443
 444
 445 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
 446 {
 447         wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
 448                    wps->wps_state);
 449         wpabuf_put_be16(msg, ATTR_WPS_STATE);
 450         wpabuf_put_be16(msg, 1);
 451         wpabuf_put_u8(msg, wps->wps_state);
 452         return 0;
 453 }
 454
 455
 456 #ifdef CONFIG_WPS_UPNP
 457 static void wps_registrar_free_pending_m2(struct wps_context *wps)
 458 {
 459         struct upnp_pending_message *p, *p2, *prev = NULL;
 460         p = wps->upnp_msgs;
 461         while (p) {
 462                 if (p->type == WPS_M2 || p->type == WPS_M2D) {
 463                         if (prev == NULL)
 464                                 wps->upnp_msgs = p->next;
 465                         else
 466                                 prev->next = p->next;
 467                         wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
 468                         p2 = p;
 469                         p = p->next;
 470                         wpabuf_free(p2->msg);
 471                         os_free(p2);
 472                         continue;
 473                 }
 474                 prev = p;
 475                 p = p->next;
 476         }
 477 }
 478 #endif /* CONFIG_WPS_UPNP */
 479
 480
 481 static int wps_build_ap_setup_locked(struct wps_context *wps,
 482                                      struct wpabuf *msg)
 483 {
 484         if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
 485                 wpa_printf(MSG_DEBUG, "WPS:  * AP Setup Locked");
 486                 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
 487                 wpabuf_put_be16(msg, 1);
 488                 wpabuf_put_u8(msg, 1);
 489         }
 490         return 0;
 491 }
 492
 493
 494 static int wps_build_selected_registrar(struct wps_registrar *reg,
 495                                         struct wpabuf *msg)
 496 {
 497         if (!reg->sel_reg_union)
 498                 return 0;
 499         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar");
 500         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
 501         wpabuf_put_be16(msg, 1);
 502         wpabuf_put_u8(msg, 1);
 503         return 0;
 504 }
 505
 506
 507 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
 508                                              struct wpabuf *msg)
 509 {
 510         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 511         if (!reg->sel_reg_union)
 512                 return 0;
 513         if (reg->sel_reg_dev_password_id_override >= 0)
 514                 id = reg->sel_reg_dev_password_id_override;
 515         wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
 516         wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
 517         wpabuf_put_be16(msg, 2);
 518         wpabuf_put_be16(msg, id);
 519         return 0;
 520 }
 521
 522
 523 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
 524                                         struct wpabuf *msg)
 525 {
 526         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 527         if (!reg->sel_reg_union)
 528                 return 0;
 529         if (reg->sel_reg_dev_password_id_override >= 0)
 530                 id = reg->sel_reg_dev_password_id_override;
 531         if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
 532                 return 0;
 533         return wps_build_uuid_e(msg, reg->wps->uuid);
 534 }
 535
 536
 537 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
 538 {
 539         *methods |= WPS_CONFIG_PUSHBUTTON;
 540 #ifdef CONFIG_WPS2
 541         if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
 542             WPS_CONFIG_VIRT_PUSHBUTTON)
 543                 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
 544         if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
 545             WPS_CONFIG_PHY_PUSHBUTTON)
 546                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 547         if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
 548             WPS_CONFIG_VIRT_PUSHBUTTON &&
 549             (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
 550             WPS_CONFIG_PHY_PUSHBUTTON) {
 551                 /*
 552                  * Required to include virtual/physical flag, but we were not
 553                  * configured with push button type, so have to default to one
 554                  * of them.
 555                  */
 556                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 557         }
 558 #endif /* CONFIG_WPS2 */
 559 }
 560
 561
 562 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
 563                                             struct wpabuf *msg)
 564 {
 565         u16 methods;
 566         if (!reg->sel_reg_union)
 567                 return 0;
 568         methods = reg->wps->config_methods;
 569         methods &= ~WPS_CONFIG_PUSHBUTTON;
 570 #ifdef CONFIG_WPS2
 571         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 572                      WPS_CONFIG_PHY_PUSHBUTTON);
 573 #endif /* CONFIG_WPS2 */
 574         if (reg->pbc)
 575                 wps_set_pushbutton(&methods, reg->wps->config_methods);
 576         if (reg->sel_reg_config_methods_override >= 0)
 577                 methods = reg->sel_reg_config_methods_override;
 578         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar Config Methods (%x)",
 579                    methods);
 580         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
 581         wpabuf_put_be16(msg, 2);
 582         wpabuf_put_be16(msg, methods);
 583         return 0;
 584 }
 585
 586
 587 static int wps_build_probe_config_methods(struct wps_registrar *reg,
 588                                           struct wpabuf *msg)
 589 {
 590         u16 methods;
 591         /*
 592          * These are the methods that the AP supports as an Enrollee for adding
 593          * external Registrars.
 594          */
 595         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 596 #ifdef CONFIG_WPS2
 597         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 598                      WPS_CONFIG_PHY_PUSHBUTTON);
 599 #endif /* CONFIG_WPS2 */
 600         wpa_printf(MSG_DEBUG, "WPS:  * Config Methods (%x)", methods);
 601         wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
 602         wpabuf_put_be16(msg, 2);
 603         wpabuf_put_be16(msg, methods);
 604         return 0;
 605 }
 606
 607
 608 static int wps_build_config_methods_r(struct wps_registrar *reg,
 609                                       struct wpabuf *msg)
 610 {
 611         return wps_build_config_methods(msg, reg->wps->config_methods);
 612 }
 613
 614
 615 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
 616 {
 617         *count = 0;
 618
 619 #ifdef CONFIG_WPS2
 620         while (*count < WPS_MAX_AUTHORIZED_MACS) {
 621                 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
 622                         break;
 623                 (*count)++;
 624         }
 625 #endif /* CONFIG_WPS2 */
 626
 627         return (const u8 *) reg->authorized_macs_union;
 628 }
 629
 630
 631 /**
 632  * wps_registrar_init - Initialize WPS Registrar data
 633  * @wps: Pointer to longterm WPS context
 634  * @cfg: Registrar configuration
 635  * Returns: Pointer to allocated Registrar data or %NULL on failure
 636  *
 637  * This function is used to initialize WPS Registrar functionality. It can be
 638  * used for a single Registrar run (e.g., when run in a supplicant) or multiple
 639  * runs (e.g., when run as an internal Registrar in an AP). Caller is
 640  * responsible for freeing the returned data with wps_registrar_deinit() when
 641  * Registrar functionality is not needed anymore.
 642  */
 643 struct wps_registrar *
 644 wps_registrar_init(struct wps_context *wps,
 645                    const struct wps_registrar_config *cfg)
 646 {
 647         struct wps_registrar *reg = os_zalloc(sizeof(*reg));
 648         if (reg == NULL)
 649                 return NULL;
 650
 651         dl_list_init(&reg->pins);
 652         dl_list_init(&reg->nfc_pw_tokens);
 653         reg->wps = wps;
 654         reg->new_psk_cb = cfg->new_psk_cb;
 655         reg->set_ie_cb = cfg->set_ie_cb;
 656         reg->pin_needed_cb = cfg->pin_needed_cb;
 657         reg->reg_success_cb = cfg->reg_success_cb;
 658         reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
 659         reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
 660         reg->cb_ctx = cfg->cb_ctx;
 661         reg->skip_cred_build = cfg->skip_cred_build;
 662         if (cfg->extra_cred) {
 663                 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
 664                                                     cfg->extra_cred_len);
 665                 if (reg->extra_cred == NULL) {
 666                         os_free(reg);
 667                         return NULL;
 668                 }
 669         }
 670         reg->disable_auto_conf = cfg->disable_auto_conf;
 671         reg->sel_reg_dev_password_id_override = -1;
 672         reg->sel_reg_config_methods_override = -1;
 673         reg->static_wep_only = cfg->static_wep_only;
 674         reg->dualband = cfg->dualband;
 675
 676         if (wps_set_ie(reg)) {
 677                 wps_registrar_deinit(reg);
 678                 return NULL;
 679         }
 680
 681         return reg;
 682 }
 683
 684
 685 /**
 686  * wps_registrar_deinit - Deinitialize WPS Registrar data
 687  * @reg: Registrar data from wps_registrar_init()
 688  */
 689 void wps_registrar_deinit(struct wps_registrar *reg)
 690 {
 691         if (reg == NULL)
 692                 return;
 693         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 694         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 695         wps_free_pins(&reg->pins);
 696         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, 0);
 697         wps_free_pbc_sessions(reg->pbc_sessions);
 698         wpabuf_free(reg->extra_cred);
 699         wps_free_devices(reg->devices);
 700         os_free(reg);
 701 }
 702
 703
 704 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
 705 {
 706         struct wps_uuid_pin *pin;
 707
 708         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 709                 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
 710                         wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
 711                                    "configured wildcard PIN");
 712                         wps_registrar_remove_pin(reg, pin);
 713                         break;
 714                 }
 715         }
 716 }
 717
 718
 719 /**
 720  * wps_registrar_add_pin - Configure a new PIN for Registrar
 721  * @reg: Registrar data from wps_registrar_init()
 722  * @addr: Enrollee MAC address or %NULL if not known
 723  * @uuid: UUID-E or %NULL for wildcard (any UUID)
 724  * @pin: PIN (Device Password)
 725  * @pin_len: Length of pin in octets
 726  * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
 727  * Returns: 0 on success, -1 on failure
 728  */
 729 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
 730                           const u8 *uuid, const u8 *pin, size_t pin_len,
 731                           int timeout)
 732 {
 733         struct wps_uuid_pin *p;
 734
 735         p = os_zalloc(sizeof(*p));
 736         if (p == NULL)
 737                 return -1;
 738         if (addr)
 739                 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
 740         if (uuid == NULL)
 741                 p->wildcard_uuid = 1;
 742         else
 743                 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
 744         p->pin = os_malloc(pin_len);
 745         if (p->pin == NULL) {
 746                 os_free(p);
 747                 return -1;
 748         }
 749         os_memcpy(p->pin, pin, pin_len);
 750         p->pin_len = pin_len;
 751
 752         if (timeout) {
 753                 p->flags |= PIN_EXPIRES;
 754                 os_get_time(&p->expiration);
 755                 p->expiration.sec += timeout;
 756         }
 757
 758         if (p->wildcard_uuid)
 759                 wps_registrar_invalidate_unused(reg);
 760
 761         dl_list_add(&reg->pins, &p->list);
 762
 763         wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
 764                    timeout);
 765         wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
 766         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
 767         reg->selected_registrar = 1;
 768         reg->pbc = 0;
 769         if (addr)
 770                 wps_registrar_add_authorized_mac(reg, addr);
 771         else
 772                 wps_registrar_add_authorized_mac(
 773                         reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
 774         wps_registrar_selected_registrar_changed(reg);
 775         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 776         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
 777                                wps_registrar_set_selected_timeout,
 778                                reg, NULL);
 779
 780         return 0;
 781 }
 782
 783
 784 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 785                                      struct wps_uuid_pin *pin)
 786 {
 787         u8 *addr;
 788         u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 789
 790         if (is_zero_ether_addr(pin->enrollee_addr))
 791                 addr = bcast;
 792         else
 793                 addr = pin->enrollee_addr;
 794         wps_registrar_remove_authorized_mac(reg, addr);
 795         wps_remove_pin(pin);
 796         wps_registrar_selected_registrar_changed(reg);
 797 }
 798
 799
 800 static void wps_registrar_expire_pins(struct wps_registrar *reg)
 801 {
 802         struct wps_uuid_pin *pin, *prev;
 803         struct os_time now;
 804
 805         os_get_time(&now);
 806         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 807         {
 808                 if ((pin->flags & PIN_EXPIRES) &&
 809                     os_time_before(&pin->expiration, &now)) {
 810                         wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
 811                                     pin->uuid, WPS_UUID_LEN);
 812                         wps_registrar_remove_pin(reg, pin);
 813                 }
 814         }
 815 }
 816
 817
 818 /**
 819  * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
 820  * @reg: Registrar data from wps_registrar_init()
 821  * @dev_pw: PIN to search for or %NULL to match any
 822  * @dev_pw_len: Length of dev_pw in octets
 823  * Returns: 0 on success, -1 if not wildcard PIN is enabled
 824  */
 825 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
 826                                                  const u8 *dev_pw,
 827                                                  size_t dev_pw_len)
 828 {
 829         struct wps_uuid_pin *pin, *prev;
 830
 831         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 832         {
 833                 if (dev_pw && pin->pin &&
 834                     (dev_pw_len != pin->pin_len ||
 835                      os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0))
 836                         continue; /* different PIN */
 837                 if (pin->wildcard_uuid) {
 838                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 839                                     pin->uuid, WPS_UUID_LEN);
 840                         wps_registrar_remove_pin(reg, pin);
 841                         return 0;
 842                 }
 843         }
 844
 845         return -1;
 846 }
 847
 848
 849 /**
 850  * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
 851  * @reg: Registrar data from wps_registrar_init()
 852  * @uuid: UUID-E
 853  * Returns: 0 on success, -1 on failure (e.g., PIN not found)
 854  */
 855 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
 856 {
 857         struct wps_uuid_pin *pin, *prev;
 858
 859         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 860         {
 861                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 862                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 863                                     pin->uuid, WPS_UUID_LEN);
 864                         wps_registrar_remove_pin(reg, pin);
 865                         return 0;
 866                 }
 867         }
 868
 869         return -1;
 870 }
 871
 872
 873 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
 874                                         const u8 *uuid, size_t *pin_len)
 875 {
 876         struct wps_uuid_pin *pin, *found = NULL;
 877
 878         wps_registrar_expire_pins(reg);
 879
 880         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 881                 if (!pin->wildcard_uuid &&
 882                     os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 883                         found = pin;
 884                         break;
 885                 }
 886         }
 887
 888         if (!found) {
 889                 /* Check for wildcard UUIDs since none of the UUID-specific
 890                  * PINs matched */
 891                 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 892                         if (pin->wildcard_uuid == 1 ||
 893                             pin->wildcard_uuid == 2) {
 894                                 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
 895                                            "PIN. Assigned it for this UUID-E");
 896                                 pin->wildcard_uuid++;
 897                                 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
 898                                 found = pin;
 899                                 break;
 900                         }
 901                 }
 902         }
 903
 904         if (!found)
 905                 return NULL;
 906
 907         /*
 908          * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
 909          * that could otherwise avoid PIN invalidations.
 910          */
 911         if (found->flags & PIN_LOCKED) {
 912                 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
 913                            "allow concurrent re-use");
 914                 return NULL;
 915         }
 916         *pin_len = found->pin_len;
 917         found->flags |= PIN_LOCKED;
 918         return found->pin;
 919 }
 920
 921
 922 /**
 923  * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
 924  * @reg: Registrar data from wps_registrar_init()
 925  * @uuid: UUID-E
 926  * Returns: 0 on success, -1 on failure
 927  *
 928  * PINs are locked to enforce only one concurrent use. This function unlocks a
 929  * PIN to allow it to be used again. If the specified PIN was configured using
 930  * a wildcard UUID, it will be removed instead of allowing multiple uses.
 931  */
 932 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
 933 {
 934         struct wps_uuid_pin *pin;
 935
 936         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 937                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 938                         if (pin->wildcard_uuid == 3) {
 939                                 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
 940                                            "wildcard PIN");
 941                                 return wps_registrar_invalidate_pin(reg, uuid);
 942                         }
 943                         pin->flags &= ~PIN_LOCKED;
 944                         return 0;
 945                 }
 946         }
 947
 948         return -1;
 949 }
 950
 951
 952 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
 953 {
 954         reg->selected_registrar = 0;
 955         reg->pbc = 0;
 956         os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
 957         wps_registrar_remove_authorized_mac(reg,
 958                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
 959         wps_registrar_selected_registrar_changed(reg);
 960 }
 961
 962
 963 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
 964 {
 965         struct wps_registrar *reg = eloop_ctx;
 966
 967         wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
 968         wps_pbc_timeout_event(reg->wps);
 969         wps_registrar_stop_pbc(reg);
 970 }
 971
 972
 973 /**
 974  * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
 975  * @reg: Registrar data from wps_registrar_init()
 976  * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
 977  *      indicates no such filtering
 978  * Returns: 0 on success, -1 on failure, -2 on session overlap
 979  *
 980  * This function is called on an AP when a push button is pushed to activate
 981  * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
 982  * or when a PBC registration is completed. If more than one Enrollee in active
 983  * PBC mode has been detected during the monitor time (previous 2 minutes), the
 984  * PBC mode is not activated and -2 is returned to indicate session overlap.
 985  * This is skipped if a specific Enrollee is selected.
 986  */
 987 int wps_registrar_button_pushed(struct wps_registrar *reg,
 988                                 const u8 *p2p_dev_addr)
 989 {
 990         if (p2p_dev_addr == NULL &&
 991             wps_registrar_pbc_overlap(reg, NULL, NULL)) {
 992                 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
 993                            "mode");
 994                 wps_pbc_overlap_event(reg->wps);
 995                 return -2;
 996         }
 997         wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
 998         reg->force_pbc_overlap = 0;
 999         reg->selected_registrar = 1;
1000         reg->pbc = 1;
1001         if (p2p_dev_addr)
1002                 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
1003         else
1004                 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1005         wps_registrar_add_authorized_mac(reg,
1006                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
1007         wps_registrar_selected_registrar_changed(reg);
1008
1009         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1010         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1011         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1012                                reg, NULL);
1013         return 0;
1014 }
1015
1016
1017 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1018 {
1019         wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1020         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1021         wps_registrar_stop_pbc(reg);
1022 }
1023
1024
1025 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1026 {
1027         wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1028         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1029         reg->selected_registrar = 0;
1030         wps_registrar_selected_registrar_changed(reg);
1031 }
1032
1033
1034 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1035                             const u8 *dev_pw, size_t dev_pw_len)
1036 {
1037         if (registrar->pbc) {
1038                 wps_registrar_remove_pbc_session(registrar,
1039                                                  uuid_e, NULL);
1040                 wps_registrar_pbc_completed(registrar);
1041                 os_get_time(&registrar->pbc_ignore_start);
1042                 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1043         } else {
1044                 wps_registrar_pin_completed(registrar);
1045         }
1046
1047         if (dev_pw &&
1048             wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1049                                                   dev_pw_len) == 0) {
1050                 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1051                                 dev_pw, dev_pw_len);
1052         }
1053 }
1054
1055
1056 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1057 {
1058         if (reg->pbc) {
1059                 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1060                 wps_registrar_pbc_timeout(reg, NULL);
1061                 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1062                 return 1;
1063         } else if (reg->selected_registrar) {
1064                 /* PIN Method */
1065                 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1066                 wps_registrar_pin_completed(reg);
1067                 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1068                 return 1;
1069         }
1070         return 0;
1071 }
1072
1073
1074 /**
1075  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1076  * @reg: Registrar data from wps_registrar_init()
1077  * @addr: MAC address of the Probe Request sender
1078  * @wps_data: WPS IE contents
1079  *
1080  * This function is called on an AP when a Probe Request with WPS IE is
1081  * received. This is used to track PBC mode use and to detect possible overlap
1082  * situation with other WPS APs.
1083  */
1084 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1085                                 const struct wpabuf *wps_data,
1086                                 int p2p_wildcard)
1087 {
1088         struct wps_parse_attr attr;
1089         int skip_add = 0;
1090
1091         wpa_hexdump_buf(MSG_MSGDUMP,
1092                         "WPS: Probe Request with WPS data received",
1093                         wps_data);
1094
1095         if (wps_parse_msg(wps_data, &attr) < 0)
1096                 return;
1097
1098         if (attr.config_methods == NULL) {
1099                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1100                            "Probe Request");
1101                 return;
1102         }
1103
1104         if (attr.dev_password_id == NULL) {
1105                 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1106                            "in Probe Request");
1107                 return;
1108         }
1109
1110         if (reg->enrollee_seen_cb && attr.uuid_e &&
1111             attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1112                 char *dev_name = NULL;
1113                 if (attr.dev_name) {
1114                         dev_name = os_zalloc(attr.dev_name_len + 1);
1115                         if (dev_name) {
1116                                 os_memcpy(dev_name, attr.dev_name,
1117                                           attr.dev_name_len);
1118                         }
1119                 }
1120                 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1121                                       attr.primary_dev_type,
1122                                       WPA_GET_BE16(attr.config_methods),
1123                                       WPA_GET_BE16(attr.dev_password_id),
1124                                       *attr.request_type, dev_name);
1125                 os_free(dev_name);
1126         }
1127
1128         if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1129                 return; /* Not PBC */
1130
1131         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1132                    MACSTR, MAC2STR(addr));
1133         if (attr.uuid_e == NULL) {
1134                 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1135                            "UUID-E included");
1136                 return;
1137         }
1138         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1139                     WPS_UUID_LEN);
1140
1141 #ifdef WPS_WORKAROUNDS
1142         if (reg->pbc_ignore_start.sec &&
1143             os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1144                 struct os_time now, dur;
1145                 os_get_time(&now);
1146                 os_time_sub(&now, &reg->pbc_ignore_start, &dur);
1147                 if (dur.sec >= 0 && dur.sec < 5) {
1148                         wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1149                                    "based on Probe Request from the Enrollee "
1150                                    "that just completed PBC provisioning");
1151                         skip_add = 1;
1152                 } else
1153                         reg->pbc_ignore_start.sec = 0;
1154         }
1155 #endif /* WPS_WORKAROUNDS */
1156
1157         if (!skip_add)
1158                 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1159         if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1160                 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1161                 reg->force_pbc_overlap = 1;
1162                 wps_pbc_overlap_event(reg->wps);
1163         }
1164 }
1165
1166
1167 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1168                           const u8 *psk, size_t psk_len)
1169 {
1170         if (reg->new_psk_cb == NULL)
1171                 return 0;
1172
1173         return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1174 }
1175
1176
1177 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1178                               const struct wps_device_data *dev)
1179 {
1180         if (reg->pin_needed_cb == NULL)
1181                 return;
1182
1183         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1184 }
1185
1186
1187 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1188                                const u8 *uuid_e, const u8 *dev_pw,
1189                                size_t dev_pw_len)
1190 {
1191         if (reg->reg_success_cb == NULL)
1192                 return;
1193
1194         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1195 }
1196
1197
1198 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1199                          struct wpabuf *probe_resp_ie)
1200 {
1201         return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1202 }
1203
1204
1205 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1206 {
1207         u16 methods = 0;
1208         if (reg->set_sel_reg_cb == NULL)
1209                 return;
1210
1211         if (reg->selected_registrar) {
1212                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1213 #ifdef CONFIG_WPS2
1214                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1215                              WPS_CONFIG_PHY_PUSHBUTTON);
1216 #endif /* CONFIG_WPS2 */
1217                 if (reg->pbc)
1218                         wps_set_pushbutton(&methods, reg->wps->config_methods);
1219         }
1220
1221         wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1222                    "config_methods=0x%x pbc=%d methods=0x%x",
1223                    reg->selected_registrar, reg->wps->config_methods,
1224                    reg->pbc, methods);
1225
1226         reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1227                             reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1228                             methods);
1229 }
1230
1231
1232 static int wps_set_ie(struct wps_registrar *reg)
1233 {
1234         struct wpabuf *beacon;
1235         struct wpabuf *probe;
1236         const u8 *auth_macs;
1237         size_t count;
1238         size_t vendor_len = 0;
1239         int i;
1240
1241         if (reg->set_ie_cb == NULL)
1242                 return 0;
1243
1244         for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1245                 if (reg->wps->dev.vendor_ext[i]) {
1246                         vendor_len += 2 + 2;
1247                         vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1248                 }
1249         }
1250
1251         beacon = wpabuf_alloc(400 + vendor_len);
1252         if (beacon == NULL)
1253                 return -1;
1254         probe = wpabuf_alloc(500 + vendor_len);
1255         if (probe == NULL) {
1256                 wpabuf_free(beacon);
1257                 return -1;
1258         }
1259
1260         auth_macs = wps_authorized_macs(reg, &count);
1261
1262         wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1263
1264         if (wps_build_version(beacon) ||
1265             wps_build_wps_state(reg->wps, beacon) ||
1266             wps_build_ap_setup_locked(reg->wps, beacon) ||
1267             wps_build_selected_registrar(reg, beacon) ||
1268             wps_build_sel_reg_dev_password_id(reg, beacon) ||
1269             wps_build_sel_reg_config_methods(reg, beacon) ||
1270             wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1271             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1272             wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1273             wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1274                 wpabuf_free(beacon);
1275                 wpabuf_free(probe);
1276                 return -1;
1277         }
1278
1279 #ifdef CONFIG_P2P
1280         if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1281             wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1282                 wpabuf_free(beacon);
1283                 wpabuf_free(probe);
1284                 return -1;
1285         }
1286 #endif /* CONFIG_P2P */
1287
1288         wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1289
1290         if (wps_build_version(probe) ||
1291             wps_build_wps_state(reg->wps, probe) ||
1292             wps_build_ap_setup_locked(reg->wps, probe) ||
1293             wps_build_selected_registrar(reg, probe) ||
1294             wps_build_sel_reg_dev_password_id(reg, probe) ||
1295             wps_build_sel_reg_config_methods(reg, probe) ||
1296             wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1297                                 WPS_RESP_REGISTRAR) ||
1298             wps_build_uuid_e(probe, reg->wps->uuid) ||
1299             wps_build_device_attrs(&reg->wps->dev, probe) ||
1300             wps_build_probe_config_methods(reg, probe) ||
1301             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, probe)) ||
1302             wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1303             wps_build_vendor_ext(&reg->wps->dev, probe)) {
1304                 wpabuf_free(beacon);
1305                 wpabuf_free(probe);
1306                 return -1;
1307         }
1308
1309         beacon = wps_ie_encapsulate(beacon);
1310         probe = wps_ie_encapsulate(probe);
1311
1312         if (!beacon || !probe) {
1313                 wpabuf_free(beacon);
1314                 wpabuf_free(probe);
1315                 return -1;
1316         }
1317
1318         if (reg->static_wep_only) {
1319                 /*
1320                  * Windows XP and Vista clients can get confused about
1321                  * EAP-Identity/Request when they probe the network with
1322                  * EAPOL-Start. In such a case, they may assume the network is
1323                  * using IEEE 802.1X and prompt user for a certificate while
1324                  * the correct (non-WPS) behavior would be to ask for the
1325                  * static WEP key. As a workaround, use Microsoft Provisioning
1326                  * IE to advertise that legacy 802.1X is not supported.
1327                  */
1328                 const u8 ms_wps[7] = {
1329                         WLAN_EID_VENDOR_SPECIFIC, 5,
1330                         /* Microsoft Provisioning IE (00:50:f2:5) */
1331                         0x00, 0x50, 0xf2, 5,
1332                         0x00 /* no legacy 802.1X or MS WPS */
1333                 };
1334                 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1335                            "into Beacon/Probe Response frames");
1336                 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1337                 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1338         }
1339
1340         return wps_cb_set_ie(reg, beacon, probe);
1341 }
1342
1343
1344 static int wps_get_dev_password(struct wps_data *wps)
1345 {
1346         const u8 *pin;
1347         size_t pin_len = 0;
1348
1349         os_free(wps->dev_password);
1350         wps->dev_password = NULL;
1351
1352         if (wps->pbc) {
1353                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1354                 pin = (const u8 *) "00000000";
1355                 pin_len = 8;
1356 #ifdef CONFIG_WPS_NFC
1357         } else if (wps->nfc_pw_token) {
1358                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1359                            "Password Token");
1360                 pin = wps->nfc_pw_token->dev_pw;
1361                 pin_len = wps->nfc_pw_token->dev_pw_len;
1362 #endif /* CONFIG_WPS_NFC */
1363         } else {
1364                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1365                                             &pin_len);
1366         }
1367         if (pin == NULL) {
1368                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1369                            "the Enrollee");
1370                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1371                                   &wps->peer_dev);
1372                 return -1;
1373         }
1374
1375         wps->dev_password = os_malloc(pin_len);
1376         if (wps->dev_password == NULL)
1377                 return -1;
1378         os_memcpy(wps->dev_password, pin, pin_len);
1379         wps->dev_password_len = pin_len;
1380
1381         return 0;
1382 }
1383
1384
1385 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1386 {
1387         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1388         wpabuf_put_be16(msg, ATTR_UUID_R);
1389         wpabuf_put_be16(msg, WPS_UUID_LEN);
1390         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1391         return 0;
1392 }
1393
1394
1395 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1396 {
1397         u8 *hash;
1398         const u8 *addr[4];
1399         size_t len[4];
1400
1401         if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1402                 return -1;
1403         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1404         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1405                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1406
1407         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1408                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1409                            "R-Hash derivation");
1410                 return -1;
1411         }
1412
1413         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1414         wpabuf_put_be16(msg, ATTR_R_HASH1);
1415         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1416         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1417         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1418         addr[0] = wps->snonce;
1419         len[0] = WPS_SECRET_NONCE_LEN;
1420         addr[1] = wps->psk1;
1421         len[1] = WPS_PSK_LEN;
1422         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1423         len[2] = wpabuf_len(wps->dh_pubkey_e);
1424         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1425         len[3] = wpabuf_len(wps->dh_pubkey_r);
1426         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1427         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1428
1429         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1430         wpabuf_put_be16(msg, ATTR_R_HASH2);
1431         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1432         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1433         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1434         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1435         addr[1] = wps->psk2;
1436         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1437         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1438
1439         return 0;
1440 }
1441
1442
1443 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1444 {
1445         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1446         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1447         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1448         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1449         return 0;
1450 }
1451
1452
1453 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1454 {
1455         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1456         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1457         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1458         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1459                         WPS_SECRET_NONCE_LEN);
1460         return 0;
1461 }
1462
1463
1464 static int wps_build_cred_network_idx(struct wpabuf *msg,
1465                                       const struct wps_credential *cred)
1466 {
1467         wpa_printf(MSG_DEBUG, "WPS:  * Network Index (1)");
1468         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1469         wpabuf_put_be16(msg, 1);
1470         wpabuf_put_u8(msg, 1);
1471         return 0;
1472 }
1473
1474
1475 static int wps_build_cred_ssid(struct wpabuf *msg,
1476                                const struct wps_credential *cred)
1477 {
1478         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1479         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1480                           cred->ssid, cred->ssid_len);
1481         wpabuf_put_be16(msg, ATTR_SSID);
1482         wpabuf_put_be16(msg, cred->ssid_len);
1483         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1484         return 0;
1485 }
1486
1487
1488 static int wps_build_cred_auth_type(struct wpabuf *msg,
1489                                     const struct wps_credential *cred)
1490 {
1491         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1492                    cred->auth_type);
1493         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1494         wpabuf_put_be16(msg, 2);
1495         wpabuf_put_be16(msg, cred->auth_type);
1496         return 0;
1497 }
1498
1499
1500 static int wps_build_cred_encr_type(struct wpabuf *msg,
1501                                     const struct wps_credential *cred)
1502 {
1503         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1504                    cred->encr_type);
1505         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1506         wpabuf_put_be16(msg, 2);
1507         wpabuf_put_be16(msg, cred->encr_type);
1508         return 0;
1509 }
1510
1511
1512 static int wps_build_cred_network_key(struct wpabuf *msg,
1513                                       const struct wps_credential *cred)
1514 {
1515         wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1516                    (int) cred->key_len);
1517         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1518                         cred->key, cred->key_len);
1519         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1520         wpabuf_put_be16(msg, cred->key_len);
1521         wpabuf_put_data(msg, cred->key, cred->key_len);
1522         return 0;
1523 }
1524
1525
1526 static int wps_build_cred_mac_addr(struct wpabuf *msg,
1527                                    const struct wps_credential *cred)
1528 {
1529         wpa_printf(MSG_DEBUG, "WPS:  * MAC Address (" MACSTR ")",
1530                    MAC2STR(cred->mac_addr));
1531         wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1532         wpabuf_put_be16(msg, ETH_ALEN);
1533         wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1534         return 0;
1535 }
1536
1537
1538 static int wps_build_credential(struct wpabuf *msg,
1539                                 const struct wps_credential *cred)
1540 {
1541         if (wps_build_cred_network_idx(msg, cred) ||
1542             wps_build_cred_ssid(msg, cred) ||
1543             wps_build_cred_auth_type(msg, cred) ||
1544             wps_build_cred_encr_type(msg, cred) ||
1545             wps_build_cred_network_key(msg, cred) ||
1546             wps_build_cred_mac_addr(msg, cred))
1547                 return -1;
1548         return 0;
1549 }
1550
1551
1552 int wps_build_credential_wrap(struct wpabuf *msg,
1553                               const struct wps_credential *cred)
1554 {
1555         struct wpabuf *wbuf;
1556         wbuf = wpabuf_alloc(200);
1557         if (wbuf == NULL)
1558                 return -1;
1559         if (wps_build_credential(wbuf, cred)) {
1560                 wpabuf_free(wbuf);
1561                 return -1;
1562         }
1563         wpabuf_put_be16(msg, ATTR_CRED);
1564         wpabuf_put_be16(msg, wpabuf_len(wbuf));
1565         wpabuf_put_buf(msg, wbuf);
1566         wpabuf_free(wbuf);
1567         return 0;
1568 }
1569
1570
1571 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1572 {
1573         struct wpabuf *cred;
1574
1575         if (wps->wps->registrar->skip_cred_build)
1576                 goto skip_cred_build;
1577
1578         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1579         if (wps->use_cred) {
1580                 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1581                 goto use_provided;
1582         }
1583         os_memset(&wps->cred, 0, sizeof(wps->cred));
1584
1585         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1586         wps->cred.ssid_len = wps->wps->ssid_len;
1587
1588         /* Select the best authentication and encryption type */
1589         if (wps->auth_type & WPS_AUTH_WPA2PSK)
1590                 wps->auth_type = WPS_AUTH_WPA2PSK;
1591         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1592                 wps->auth_type = WPS_AUTH_WPAPSK;
1593         else if (wps->auth_type & WPS_AUTH_OPEN)
1594                 wps->auth_type = WPS_AUTH_OPEN;
1595         else if (wps->auth_type & WPS_AUTH_SHARED)
1596                 wps->auth_type = WPS_AUTH_SHARED;
1597         else {
1598                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1599                            wps->auth_type);
1600                 return -1;
1601         }
1602         wps->cred.auth_type = wps->auth_type;
1603
1604         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1605             wps->auth_type == WPS_AUTH_WPAPSK) {
1606                 if (wps->encr_type & WPS_ENCR_AES)
1607                         wps->encr_type = WPS_ENCR_AES;
1608                 else if (wps->encr_type & WPS_ENCR_TKIP)
1609                         wps->encr_type = WPS_ENCR_TKIP;
1610                 else {
1611                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1612                                    "type for WPA/WPA2");
1613                         return -1;
1614                 }
1615         } else {
1616                 if (wps->encr_type & WPS_ENCR_WEP)
1617                         wps->encr_type = WPS_ENCR_WEP;
1618                 else if (wps->encr_type & WPS_ENCR_NONE)
1619                         wps->encr_type = WPS_ENCR_NONE;
1620                 else {
1621                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1622                                    "type for non-WPA/WPA2 mode");
1623                         return -1;
1624                 }
1625         }
1626         wps->cred.encr_type = wps->encr_type;
1627         /*
1628          * Set MAC address in the Credential to be the Enrollee's MAC address
1629          */
1630         os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1631
1632         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1633             !wps->wps->registrar->disable_auto_conf) {
1634                 u8 r[16];
1635                 /* Generate a random passphrase */
1636                 if (random_get_bytes(r, sizeof(r)) < 0)
1637                         return -1;
1638                 os_free(wps->new_psk);
1639                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1640                 if (wps->new_psk == NULL)
1641                         return -1;
1642                 wps->new_psk_len--; /* remove newline */
1643                 while (wps->new_psk_len &&
1644                        wps->new_psk[wps->new_psk_len - 1] == '=')
1645                         wps->new_psk_len--;
1646                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1647                                       wps->new_psk, wps->new_psk_len);
1648                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1649                 wps->cred.key_len = wps->new_psk_len;
1650         } else if (wps->use_psk_key && wps->wps->psk_set) {
1651                 char hex[65];
1652                 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1653                 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1654                 os_memcpy(wps->cred.key, hex, 32 * 2);
1655                 wps->cred.key_len = 32 * 2;
1656         } else if (wps->wps->network_key) {
1657                 os_memcpy(wps->cred.key, wps->wps->network_key,
1658                           wps->wps->network_key_len);
1659                 wps->cred.key_len = wps->wps->network_key_len;
1660         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1661                 char hex[65];
1662                 /* Generate a random per-device PSK */
1663                 os_free(wps->new_psk);
1664                 wps->new_psk_len = 32;
1665                 wps->new_psk = os_malloc(wps->new_psk_len);
1666                 if (wps->new_psk == NULL)
1667                         return -1;
1668                 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1669                         os_free(wps->new_psk);
1670                         wps->new_psk = NULL;
1671                         return -1;
1672                 }
1673                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1674                                 wps->new_psk, wps->new_psk_len);
1675                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1676                                  wps->new_psk_len);
1677                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1678                 wps->cred.key_len = wps->new_psk_len * 2;
1679         }
1680
1681 use_provided:
1682 #ifdef CONFIG_WPS_TESTING
1683         if (wps_testing_dummy_cred)
1684                 cred = wpabuf_alloc(200);
1685         else
1686                 cred = NULL;
1687         if (cred) {
1688                 struct wps_credential dummy;
1689                 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1690                 os_memset(&dummy, 0, sizeof(dummy));
1691                 os_memcpy(dummy.ssid, "dummy", 5);
1692                 dummy.ssid_len = 5;
1693                 dummy.auth_type = WPS_AUTH_WPA2PSK;
1694                 dummy.encr_type = WPS_ENCR_AES;
1695                 os_memcpy(dummy.key, "dummy psk", 9);
1696                 dummy.key_len = 9;
1697                 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1698                 wps_build_credential(cred, &dummy);
1699                 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1700
1701                 wpabuf_put_be16(msg, ATTR_CRED);
1702                 wpabuf_put_be16(msg, wpabuf_len(cred));
1703                 wpabuf_put_buf(msg, cred);
1704
1705                 wpabuf_free(cred);
1706         }
1707 #endif /* CONFIG_WPS_TESTING */
1708
1709         cred = wpabuf_alloc(200);
1710         if (cred == NULL)
1711                 return -1;
1712
1713         if (wps_build_credential(cred, &wps->cred)) {
1714                 wpabuf_free(cred);
1715                 return -1;
1716         }
1717
1718         wpabuf_put_be16(msg, ATTR_CRED);
1719         wpabuf_put_be16(msg, wpabuf_len(cred));
1720         wpabuf_put_buf(msg, cred);
1721         wpabuf_free(cred);
1722
1723 skip_cred_build:
1724         if (wps->wps->registrar->extra_cred) {
1725                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1726                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1727         }
1728
1729         return 0;
1730 }
1731
1732
1733 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1734 {
1735         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1736
1737         if (wps_build_credential(msg, &wps->cred))
1738                 return -1;
1739
1740         return 0;
1741 }
1742
1743
1744 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1745 {
1746         struct wpabuf *msg, *plain;
1747
1748         msg = wpabuf_alloc(1000);
1749         if (msg == NULL)
1750                 return NULL;
1751
1752         plain = wpabuf_alloc(200);
1753         if (plain == NULL) {
1754                 wpabuf_free(msg);
1755                 return NULL;
1756         }
1757
1758         if (wps_build_ap_settings(wps, plain)) {
1759                 wpabuf_free(plain);
1760                 wpabuf_free(msg);
1761                 return NULL;
1762         }
1763
1764         wpabuf_put_be16(msg, ATTR_CRED);
1765         wpabuf_put_be16(msg, wpabuf_len(plain));
1766         wpabuf_put_buf(msg, plain);
1767         wpabuf_free(plain);
1768
1769         return msg;
1770 }
1771
1772
1773 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1774 {
1775         struct wpabuf *msg;
1776
1777         if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1778                 return NULL;
1779         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1780                     wps->nonce_r, WPS_NONCE_LEN);
1781         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1782
1783         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1784         msg = wpabuf_alloc(1000);
1785         if (msg == NULL)
1786                 return NULL;
1787
1788         if (wps_build_version(msg) ||
1789             wps_build_msg_type(msg, WPS_M2) ||
1790             wps_build_enrollee_nonce(wps, msg) ||
1791             wps_build_registrar_nonce(wps, msg) ||
1792             wps_build_uuid_r(wps, msg) ||
1793             wps_build_public_key(wps, msg) ||
1794             wps_derive_keys(wps) ||
1795             wps_build_auth_type_flags(wps, msg) ||
1796             wps_build_encr_type_flags(wps, msg) ||
1797             wps_build_conn_type_flags(wps, msg) ||
1798             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1799             wps_build_device_attrs(&wps->wps->dev, msg) ||
1800             wps_build_rf_bands(&wps->wps->dev, msg) ||
1801             wps_build_assoc_state(wps, msg) ||
1802             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1803             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1804             wps_build_os_version(&wps->wps->dev, msg) ||
1805             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1806             wps_build_authenticator(wps, msg)) {
1807                 wpabuf_free(msg);
1808                 return NULL;
1809         }
1810
1811         wps->int_reg = 1;
1812         wps->state = RECV_M3;
1813         return msg;
1814 }
1815
1816
1817 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1818 {
1819         struct wpabuf *msg;
1820         u16 err = wps->config_error;
1821
1822         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1823         msg = wpabuf_alloc(1000);
1824         if (msg == NULL)
1825                 return NULL;
1826
1827         if (wps->wps->ap && wps->wps->ap_setup_locked &&
1828             err == WPS_CFG_NO_ERROR)
1829                 err = WPS_CFG_SETUP_LOCKED;
1830
1831         if (wps_build_version(msg) ||
1832             wps_build_msg_type(msg, WPS_M2D) ||
1833             wps_build_enrollee_nonce(wps, msg) ||
1834             wps_build_registrar_nonce(wps, msg) ||
1835             wps_build_uuid_r(wps, msg) ||
1836             wps_build_auth_type_flags(wps, msg) ||
1837             wps_build_encr_type_flags(wps, msg) ||
1838             wps_build_conn_type_flags(wps, msg) ||
1839             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1840             wps_build_device_attrs(&wps->wps->dev, msg) ||
1841             wps_build_rf_bands(&wps->wps->dev, msg) ||
1842             wps_build_assoc_state(wps, msg) ||
1843             wps_build_config_error(msg, err) ||
1844             wps_build_os_version(&wps->wps->dev, msg) ||
1845             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1846                 wpabuf_free(msg);
1847                 return NULL;
1848         }
1849
1850         wps->state = RECV_M2D_ACK;
1851         return msg;
1852 }
1853
1854
1855 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1856 {
1857         struct wpabuf *msg, *plain;
1858
1859         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1860
1861         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1862
1863         plain = wpabuf_alloc(200);
1864         if (plain == NULL)
1865                 return NULL;
1866
1867         msg = wpabuf_alloc(1000);
1868         if (msg == NULL) {
1869                 wpabuf_free(plain);
1870                 return NULL;
1871         }
1872
1873         if (wps_build_version(msg) ||
1874             wps_build_msg_type(msg, WPS_M4) ||
1875             wps_build_enrollee_nonce(wps, msg) ||
1876             wps_build_r_hash(wps, msg) ||
1877             wps_build_r_snonce1(wps, plain) ||
1878             wps_build_key_wrap_auth(wps, plain) ||
1879             wps_build_encr_settings(wps, msg, plain) ||
1880             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1881             wps_build_authenticator(wps, msg)) {
1882                 wpabuf_free(plain);
1883                 wpabuf_free(msg);
1884                 return NULL;
1885         }
1886         wpabuf_free(plain);
1887
1888         wps->state = RECV_M5;
1889         return msg;
1890 }
1891
1892
1893 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1894 {
1895         struct wpabuf *msg, *plain;
1896
1897         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1898
1899         plain = wpabuf_alloc(200);
1900         if (plain == NULL)
1901                 return NULL;
1902
1903         msg = wpabuf_alloc(1000);
1904         if (msg == NULL) {
1905                 wpabuf_free(plain);
1906                 return NULL;
1907         }
1908
1909         if (wps_build_version(msg) ||
1910             wps_build_msg_type(msg, WPS_M6) ||
1911             wps_build_enrollee_nonce(wps, msg) ||
1912             wps_build_r_snonce2(wps, plain) ||
1913             wps_build_key_wrap_auth(wps, plain) ||
1914             wps_build_encr_settings(wps, msg, plain) ||
1915             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1916             wps_build_authenticator(wps, msg)) {
1917                 wpabuf_free(plain);
1918                 wpabuf_free(msg);
1919                 return NULL;
1920         }
1921         wpabuf_free(plain);
1922
1923         wps->wps_pin_revealed = 1;
1924         wps->state = RECV_M7;
1925         return msg;
1926 }
1927
1928
1929 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1930 {
1931         struct wpabuf *msg, *plain;
1932
1933         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1934
1935         plain = wpabuf_alloc(500);
1936         if (plain == NULL)
1937                 return NULL;
1938
1939         msg = wpabuf_alloc(1000);
1940         if (msg == NULL) {
1941                 wpabuf_free(plain);
1942                 return NULL;
1943         }
1944
1945         if (wps_build_version(msg) ||
1946             wps_build_msg_type(msg, WPS_M8) ||
1947             wps_build_enrollee_nonce(wps, msg) ||
1948             ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1949             (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1950             wps_build_key_wrap_auth(wps, plain) ||
1951             wps_build_encr_settings(wps, msg, plain) ||
1952             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1953             wps_build_authenticator(wps, msg)) {
1954                 wpabuf_free(plain);
1955                 wpabuf_free(msg);
1956                 return NULL;
1957         }
1958         wpabuf_free(plain);
1959
1960         wps->state = RECV_DONE;
1961         return msg;
1962 }
1963
1964
1965 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1966                                       enum wsc_op_code *op_code)
1967 {
1968         struct wpabuf *msg;
1969
1970 #ifdef CONFIG_WPS_UPNP
1971         if (!wps->int_reg && wps->wps->wps_upnp) {
1972                 struct upnp_pending_message *p, *prev = NULL;
1973                 if (wps->ext_reg > 1)
1974                         wps_registrar_free_pending_m2(wps->wps);
1975                 p = wps->wps->upnp_msgs;
1976                 /* TODO: check pending message MAC address */
1977                 while (p && p->next) {
1978                         prev = p;
1979                         p = p->next;
1980                 }
1981                 if (p) {
1982                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1983                                    "UPnP");
1984                         if (prev)
1985                                 prev->next = NULL;
1986                         else
1987                                 wps->wps->upnp_msgs = NULL;
1988                         msg = p->msg;
1989                         switch (p->type) {
1990                         case WPS_WSC_ACK:
1991                                 *op_code = WSC_ACK;
1992                                 break;
1993                         case WPS_WSC_NACK:
1994                                 *op_code = WSC_NACK;
1995                                 break;
1996                         default:
1997                                 *op_code = WSC_MSG;
1998                                 break;
1999                         }
2000                         os_free(p);
2001                         if (wps->ext_reg == 0)
2002                                 wps->ext_reg = 1;
2003                         return msg;
2004                 }
2005         }
2006         if (wps->ext_reg) {
2007                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2008                            "pending message available");
2009                 return NULL;
2010         }
2011 #endif /* CONFIG_WPS_UPNP */
2012
2013         switch (wps->state) {
2014         case SEND_M2:
2015                 if (wps_get_dev_password(wps) < 0)
2016                         msg = wps_build_m2d(wps);
2017                 else
2018                         msg = wps_build_m2(wps);
2019                 *op_code = WSC_MSG;
2020                 break;
2021         case SEND_M2D:
2022                 msg = wps_build_m2d(wps);
2023                 *op_code = WSC_MSG;
2024                 break;
2025         case SEND_M4:
2026                 msg = wps_build_m4(wps);
2027                 *op_code = WSC_MSG;
2028                 break;
2029         case SEND_M6:
2030                 msg = wps_build_m6(wps);
2031                 *op_code = WSC_MSG;
2032                 break;
2033         case SEND_M8:
2034                 msg = wps_build_m8(wps);
2035                 *op_code = WSC_MSG;
2036                 break;
2037         case RECV_DONE:
2038                 msg = wps_build_wsc_ack(wps);
2039                 *op_code = WSC_ACK;
2040                 break;
2041         case SEND_WSC_NACK:
2042                 msg = wps_build_wsc_nack(wps);
2043                 *op_code = WSC_NACK;
2044                 break;
2045         default:
2046                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2047                            "a message", wps->state);
2048                 msg = NULL;
2049                 break;
2050         }
2051
2052         if (*op_code == WSC_MSG && msg) {
2053                 /* Save a copy of the last message for Authenticator derivation
2054                  */
2055                 wpabuf_free(wps->last_msg);
2056                 wps->last_msg = wpabuf_dup(msg);
2057         }
2058
2059         return msg;
2060 }
2061
2062
2063 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2064 {
2065         if (e_nonce == NULL) {
2066                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2067                 return -1;
2068         }
2069
2070         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2071         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2072                     wps->nonce_e, WPS_NONCE_LEN);
2073
2074         return 0;
2075 }
2076
2077
2078 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2079 {
2080         if (r_nonce == NULL) {
2081                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2082                 return -1;
2083         }
2084
2085         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2086                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2087                 return -1;
2088         }
2089
2090         return 0;
2091 }
2092
2093
2094 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2095 {
2096         if (uuid_e == NULL) {
2097                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2098                 return -1;
2099         }
2100
2101         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2102         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2103
2104         return 0;
2105 }
2106
2107
2108 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2109 {
2110         if (pw_id == NULL) {
2111                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2112                 return -1;
2113         }
2114
2115         wps->dev_pw_id = WPA_GET_BE16(pw_id);
2116         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2117
2118         return 0;
2119 }
2120
2121
2122 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2123 {
2124         if (e_hash1 == NULL) {
2125                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2126                 return -1;
2127         }
2128
2129         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2130         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2131
2132         return 0;
2133 }
2134
2135
2136 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2137 {
2138         if (e_hash2 == NULL) {
2139                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2140                 return -1;
2141         }
2142
2143         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2144         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2145
2146         return 0;
2147 }
2148
2149
2150 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2151 {
2152         u8 hash[SHA256_MAC_LEN];
2153         const u8 *addr[4];
2154         size_t len[4];
2155
2156         if (e_snonce1 == NULL) {
2157                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2158                 return -1;
2159         }
2160
2161         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2162                         WPS_SECRET_NONCE_LEN);
2163
2164         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2165         addr[0] = e_snonce1;
2166         len[0] = WPS_SECRET_NONCE_LEN;
2167         addr[1] = wps->psk1;
2168         len[1] = WPS_PSK_LEN;
2169         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2170         len[2] = wpabuf_len(wps->dh_pubkey_e);
2171         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2172         len[3] = wpabuf_len(wps->dh_pubkey_r);
2173         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2174
2175         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2176                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2177                            "not match with the pre-committed value");
2178                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2179                 wps_pwd_auth_fail_event(wps->wps, 0, 1);
2180                 return -1;
2181         }
2182
2183         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2184                    "half of the device password");
2185
2186         return 0;
2187 }
2188
2189
2190 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2191 {
2192         u8 hash[SHA256_MAC_LEN];
2193         const u8 *addr[4];
2194         size_t len[4];
2195
2196         if (e_snonce2 == NULL) {
2197                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2198                 return -1;
2199         }
2200
2201         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2202                         WPS_SECRET_NONCE_LEN);
2203
2204         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2205         addr[0] = e_snonce2;
2206         len[0] = WPS_SECRET_NONCE_LEN;
2207         addr[1] = wps->psk2;
2208         len[1] = WPS_PSK_LEN;
2209         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2210         len[2] = wpabuf_len(wps->dh_pubkey_e);
2211         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2212         len[3] = wpabuf_len(wps->dh_pubkey_r);
2213         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2214
2215         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2216                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2217                            "not match with the pre-committed value");
2218                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2219                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2220                 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2221                 return -1;
2222         }
2223
2224         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2225                    "half of the device password");
2226         wps->wps_pin_revealed = 0;
2227         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2228
2229         /*
2230          * In case wildcard PIN is used and WPS handshake succeeds in the first
2231          * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2232          * sure the PIN gets invalidated here.
2233          */
2234         wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2235
2236         return 0;
2237 }
2238
2239
2240 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2241 {
2242         if (mac_addr == NULL) {
2243                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2244                 return -1;
2245         }
2246
2247         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2248                    MAC2STR(mac_addr));
2249         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2250         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2251
2252         return 0;
2253 }
2254
2255
2256 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2257                               size_t pk_len)
2258 {
2259         if (pk == NULL || pk_len == 0) {
2260                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2261                 return -1;
2262         }
2263
2264         wpabuf_free(wps->dh_pubkey_e);
2265         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2266         if (wps->dh_pubkey_e == NULL)
2267                 return -1;
2268
2269         return 0;
2270 }
2271
2272
2273 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2274 {
2275         u16 auth_types;
2276
2277         if (auth == NULL) {
2278                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2279                            "received");
2280                 return -1;
2281         }
2282
2283         auth_types = WPA_GET_BE16(auth);
2284
2285         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2286                    auth_types);
2287         wps->auth_type = wps->wps->auth_types & auth_types;
2288         if (wps->auth_type == 0) {
2289                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2290                            "authentication types (own 0x%x Enrollee 0x%x)",
2291                            wps->wps->auth_types, auth_types);
2292 #ifdef WPS_WORKAROUNDS
2293                 /*
2294                  * Some deployed implementations seem to advertise incorrect
2295                  * information in this attribute. For example, Linksys WRT350N
2296                  * seems to have a byteorder bug that breaks this negotiation.
2297                  * In order to interoperate with existing implementations,
2298                  * assume that the Enrollee supports everything we do.
2299                  */
2300                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2301                            "does not advertise supported authentication types "
2302                            "correctly");
2303                 wps->auth_type = wps->wps->auth_types;
2304 #else /* WPS_WORKAROUNDS */
2305                 return -1;
2306 #endif /* WPS_WORKAROUNDS */
2307         }
2308
2309         return 0;
2310 }
2311
2312
2313 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2314 {
2315         u16 encr_types;
2316
2317         if (encr == NULL) {
2318                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2319                            "received");
2320                 return -1;
2321         }
2322
2323         encr_types = WPA_GET_BE16(encr);
2324
2325         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2326                    encr_types);
2327         wps->encr_type = wps->wps->encr_types & encr_types;
2328         if (wps->encr_type == 0) {
2329                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2330                            "encryption types (own 0x%x Enrollee 0x%x)",
2331                            wps->wps->encr_types, encr_types);
2332 #ifdef WPS_WORKAROUNDS
2333                 /*
2334                  * Some deployed implementations seem to advertise incorrect
2335                  * information in this attribute. For example, Linksys WRT350N
2336                  * seems to have a byteorder bug that breaks this negotiation.
2337                  * In order to interoperate with existing implementations,
2338                  * assume that the Enrollee supports everything we do.
2339                  */
2340                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2341                            "does not advertise supported encryption types "
2342                            "correctly");
2343                 wps->encr_type = wps->wps->encr_types;
2344 #else /* WPS_WORKAROUNDS */
2345                 return -1;
2346 #endif /* WPS_WORKAROUNDS */
2347         }
2348
2349         return 0;
2350 }
2351
2352
2353 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2354 {
2355         if (conn == NULL) {
2356                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2357                            "received");
2358                 return -1;
2359         }
2360
2361         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2362                    *conn);
2363
2364         return 0;
2365 }
2366
2367
2368 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2369 {
2370         u16 m;
2371
2372         if (methods == NULL) {
2373                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2374                 return -1;
2375         }
2376
2377         m = WPA_GET_BE16(methods);
2378
2379         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2380                    "%s%s%s%s%s%s%s%s%s", m,
2381                    m & WPS_CONFIG_USBA ? " [USBA]" : "",
2382                    m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2383                    m & WPS_CONFIG_LABEL ? " [Label]" : "",
2384                    m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2385                    m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2386                    m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2387                    m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2388                    m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2389                    m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2390
2391         if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2392                 /*
2393                  * The Enrollee does not have a display so it is unlikely to be
2394                  * able to show the passphrase to a user and as such, could
2395                  * benefit from receiving PSK to reduce key derivation time.
2396                  */
2397                 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2398                            "Enrollee not supporting display");
2399                 wps->use_psk_key = 1;
2400         }
2401
2402         return 0;
2403 }
2404
2405
2406 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2407 {
2408         if (state == NULL) {
2409                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2410                            "received");
2411                 return -1;
2412         }
2413
2414         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2415                    *state);
2416
2417         return 0;
2418 }
2419
2420
2421 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2422 {
2423         u16 a;
2424
2425         if (assoc == NULL) {
2426                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2427                 return -1;
2428         }
2429
2430         a = WPA_GET_BE16(assoc);
2431         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2432
2433         return 0;
2434 }
2435
2436
2437 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2438 {
2439         u16 e;
2440
2441         if (err == NULL) {
2442                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2443                 return -1;
2444         }
2445
2446         e = WPA_GET_BE16(err);
2447         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2448
2449         return 0;
2450 }
2451
2452
2453 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2454 {
2455 #ifdef CONFIG_P2P
2456         struct wps_registrar *reg = wps->wps->registrar;
2457
2458         if (is_zero_ether_addr(reg->p2p_dev_addr))
2459                 return 1; /* no filtering in use */
2460
2461         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2462                 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2463                            "filtering for PBC: expected " MACSTR " was "
2464                            MACSTR " - indicate PBC session overlap",
2465                            MAC2STR(reg->p2p_dev_addr),
2466                            MAC2STR(wps->p2p_dev_addr));
2467                 return 0;
2468         }
2469 #endif /* CONFIG_P2P */
2470         return 1;
2471 }
2472
2473
2474 static int wps_registrar_skip_overlap(struct wps_data *wps)
2475 {
2476 #ifdef CONFIG_P2P
2477         struct wps_registrar *reg = wps->wps->registrar;
2478
2479         if (is_zero_ether_addr(reg->p2p_dev_addr))
2480                 return 0; /* no specific Enrollee selected */
2481
2482         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2483                 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2484                            "Enrollee match");
2485                 return 1;
2486         }
2487 #endif /* CONFIG_P2P */
2488         return 0;
2489 }
2490
2491
2492 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2493                                            struct wps_parse_attr *attr)
2494 {
2495         wpa_printf(MSG_DEBUG, "WPS: Received M1");
2496
2497         if (wps->state != RECV_M1) {
2498                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2499                            "receiving M1", wps->state);
2500                 return WPS_FAILURE;
2501         }
2502
2503         if (wps_process_uuid_e(wps, attr->uuid_e) ||
2504             wps_process_mac_addr(wps, attr->mac_addr) ||
2505             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2506             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2507             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2508             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2509             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2510             wps_process_config_methods(wps, attr->config_methods) ||
2511             wps_process_wps_state(wps, attr->wps_state) ||
2512             wps_process_device_attrs(&wps->peer_dev, attr) ||
2513             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2514             wps_process_assoc_state(wps, attr->assoc_state) ||
2515             wps_process_dev_password_id(wps, attr->dev_password_id) ||
2516             wps_process_config_error(wps, attr->config_error) ||
2517             wps_process_os_version(&wps->peer_dev, attr->os_version))
2518                 return WPS_FAILURE;
2519
2520         if (wps->dev_pw_id < 0x10 &&
2521             wps->dev_pw_id != DEV_PW_DEFAULT &&
2522             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2523             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2524             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2525             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2526              !wps->wps->registrar->pbc)) {
2527                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2528                            wps->dev_pw_id);
2529                 wps->state = SEND_M2D;
2530                 return WPS_CONTINUE;
2531         }
2532
2533 #ifdef CONFIG_WPS_NFC
2534         if (wps->dev_pw_id >= 0x10) {
2535                 struct wps_nfc_pw_token *token;
2536                 const u8 *addr[1];
2537                 u8 hash[WPS_HASH_LEN];
2538
2539                 token = wps_get_nfc_pw_token(
2540                         &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2541                 if (token) {
2542                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2543                                    "Password Token");
2544                         dl_list_del(&token->list);
2545                         wps->nfc_pw_token = token;
2546
2547                         addr[0] = attr->public_key;
2548                         sha256_vector(1, addr, &attr->public_key_len, hash);
2549                         if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash,
2550                                       WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2551                                 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2552                                            "mismatch");
2553                                 return WPS_FAILURE;
2554                         }
2555                 }
2556         }
2557 #endif /* CONFIG_WPS_NFC */
2558
2559         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2560                 if ((wps->wps->registrar->force_pbc_overlap ||
2561                      wps_registrar_pbc_overlap(wps->wps->registrar,
2562                                                wps->mac_addr_e, wps->uuid_e) ||
2563                      !wps_registrar_p2p_dev_addr_match(wps)) &&
2564                     !wps_registrar_skip_overlap(wps)) {
2565                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2566                                    "negotiation");
2567                         wps->state = SEND_M2D;
2568                         wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2569                         wps_pbc_overlap_event(wps->wps);
2570                         wps_fail_event(wps->wps, WPS_M1,
2571                                        WPS_CFG_MULTIPLE_PBC_DETECTED,
2572                                        WPS_EI_NO_ERROR);
2573                         wps->wps->registrar->force_pbc_overlap = 1;
2574                         return WPS_CONTINUE;
2575                 }
2576                 wps_registrar_add_pbc_session(wps->wps->registrar,
2577                                               wps->mac_addr_e, wps->uuid_e);
2578                 wps->pbc = 1;
2579         }
2580
2581 #ifdef WPS_WORKAROUNDS
2582         /*
2583          * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2584          * passphrase format. To avoid interop issues, force PSK format to be
2585          * used.
2586          */
2587         if (!wps->use_psk_key &&
2588             wps->peer_dev.manufacturer &&
2589             os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2590             wps->peer_dev.model_name &&
2591             os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2592                 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2593                            "PSK format");
2594                 wps->use_psk_key = 1;
2595         }
2596 #endif /* WPS_WORKAROUNDS */
2597
2598         wps->state = SEND_M2;
2599         return WPS_CONTINUE;
2600 }
2601
2602
2603 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2604                                            const struct wpabuf *msg,
2605                                            struct wps_parse_attr *attr)
2606 {
2607         wpa_printf(MSG_DEBUG, "WPS: Received M3");
2608
2609         if (wps->state != RECV_M3) {
2610                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2611                            "receiving M3", wps->state);
2612                 wps->state = SEND_WSC_NACK;
2613                 return WPS_CONTINUE;
2614         }
2615
2616         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2617             !wps_registrar_skip_overlap(wps)) {
2618                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2619                            "session overlap");
2620                 wps->state = SEND_WSC_NACK;
2621                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2622                 return WPS_CONTINUE;
2623         }
2624
2625         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2626             wps_process_authenticator(wps, attr->authenticator, msg) ||
2627             wps_process_e_hash1(wps, attr->e_hash1) ||
2628             wps_process_e_hash2(wps, attr->e_hash2)) {
2629                 wps->state = SEND_WSC_NACK;
2630                 return WPS_CONTINUE;
2631         }
2632
2633         wps->state = SEND_M4;
2634         return WPS_CONTINUE;
2635 }
2636
2637
2638 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2639                                            const struct wpabuf *msg,
2640                                            struct wps_parse_attr *attr)
2641 {
2642         struct wpabuf *decrypted;
2643         struct wps_parse_attr eattr;
2644
2645         wpa_printf(MSG_DEBUG, "WPS: Received M5");
2646
2647         if (wps->state != RECV_M5) {
2648                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2649                            "receiving M5", wps->state);
2650                 wps->state = SEND_WSC_NACK;
2651                 return WPS_CONTINUE;
2652         }
2653
2654         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2655             !wps_registrar_skip_overlap(wps)) {
2656                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2657                            "session overlap");
2658                 wps->state = SEND_WSC_NACK;
2659                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2660                 return WPS_CONTINUE;
2661         }
2662
2663         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2664             wps_process_authenticator(wps, attr->authenticator, msg)) {
2665                 wps->state = SEND_WSC_NACK;
2666                 return WPS_CONTINUE;
2667         }
2668
2669         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2670                                               attr->encr_settings_len);
2671         if (decrypted == NULL) {
2672                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2673                            "Settings attribute");
2674                 wps->state = SEND_WSC_NACK;
2675                 return WPS_CONTINUE;
2676         }
2677
2678         if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2679                 wpabuf_free(decrypted);
2680                 wps->state = SEND_WSC_NACK;
2681                 return WPS_CONTINUE;
2682         }
2683
2684         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2685                    "attribute");
2686         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2687             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2688             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2689                 wpabuf_free(decrypted);
2690                 wps->state = SEND_WSC_NACK;
2691                 return WPS_CONTINUE;
2692         }
2693         wpabuf_free(decrypted);
2694
2695         wps->state = SEND_M6;
2696         return WPS_CONTINUE;
2697 }
2698
2699
2700 static void wps_sta_cred_cb(struct wps_data *wps)
2701 {
2702         /*
2703          * Update credential to only include a single authentication and
2704          * encryption type in case the AP configuration includes more than one
2705          * option.
2706          */
2707         if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2708                 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2709         else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2710                 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2711         if (wps->cred.encr_type & WPS_ENCR_AES)
2712                 wps->cred.encr_type = WPS_ENCR_AES;
2713         else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2714                 wps->cred.encr_type = WPS_ENCR_TKIP;
2715         wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2716                    "AP configuration");
2717         if (wps->wps->cred_cb)
2718                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2719 }
2720
2721
2722 static void wps_cred_update(struct wps_credential *dst,
2723                             struct wps_credential *src)
2724 {
2725         os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2726         dst->ssid_len = src->ssid_len;
2727         dst->auth_type = src->auth_type;
2728         dst->encr_type = src->encr_type;
2729         dst->key_idx = src->key_idx;
2730         os_memcpy(dst->key, src->key, sizeof(dst->key));
2731         dst->key_len = src->key_len;
2732 }
2733
2734
2735 static int wps_process_ap_settings_r(struct wps_data *wps,
2736                                      struct wps_parse_attr *attr)
2737 {
2738         struct wpabuf *msg;
2739
2740         if (wps->wps->ap || wps->er)
2741                 return 0;
2742
2743         /* AP Settings Attributes in M7 when Enrollee is an AP */
2744         if (wps_process_ap_settings(attr, &wps->cred) < 0)
2745                 return -1;
2746
2747         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2748
2749         if (wps->new_ap_settings) {
2750                 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2751                            "new settings");
2752                 wps_cred_update(&wps->cred, wps->new_ap_settings);
2753                 return 0;
2754         } else {
2755                 /*
2756                  * Use the AP PIN only to receive the current AP settings, not
2757                  * to reconfigure the AP.
2758                  */
2759
2760                 /*
2761                  * Clear selected registrar here since we do not get to
2762                  * WSC_Done in this protocol run.
2763                  */
2764                 wps_registrar_pin_completed(wps->wps->registrar);
2765
2766                 msg = wps_build_ap_cred(wps);
2767                 if (msg == NULL)
2768                         return -1;
2769                 wps->cred.cred_attr = wpabuf_head(msg);
2770                 wps->cred.cred_attr_len = wpabuf_len(msg);
2771
2772                 if (wps->ap_settings_cb) {
2773                         wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2774                                             &wps->cred);
2775                         wpabuf_free(msg);
2776                         return 1;
2777                 }
2778                 wps_sta_cred_cb(wps);
2779
2780                 wps->cred.cred_attr = NULL;
2781                 wps->cred.cred_attr_len = 0;
2782                 wpabuf_free(msg);
2783
2784                 return 1;
2785         }
2786 }
2787
2788
2789 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2790                                            const struct wpabuf *msg,
2791                                            struct wps_parse_attr *attr)
2792 {
2793         struct wpabuf *decrypted;
2794         struct wps_parse_attr eattr;
2795
2796         wpa_printf(MSG_DEBUG, "WPS: Received M7");
2797
2798         if (wps->state != RECV_M7) {
2799                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2800                            "receiving M7", wps->state);
2801                 wps->state = SEND_WSC_NACK;
2802                 return WPS_CONTINUE;
2803         }
2804
2805         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2806             !wps_registrar_skip_overlap(wps)) {
2807                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2808                            "session overlap");
2809                 wps->state = SEND_WSC_NACK;
2810                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2811                 return WPS_CONTINUE;
2812         }
2813
2814         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2815             wps_process_authenticator(wps, attr->authenticator, msg)) {
2816                 wps->state = SEND_WSC_NACK;
2817                 return WPS_CONTINUE;
2818         }
2819
2820         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2821                                               attr->encr_settings_len);
2822         if (decrypted == NULL) {
2823                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2824                            "Settings attribute");
2825                 wps->state = SEND_WSC_NACK;
2826                 return WPS_CONTINUE;
2827         }
2828
2829         if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2830                                  attr->version2 != NULL) < 0) {
2831                 wpabuf_free(decrypted);
2832                 wps->state = SEND_WSC_NACK;
2833                 return WPS_CONTINUE;
2834         }
2835
2836         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2837                    "attribute");
2838         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2839             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2840             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2841             wps_process_ap_settings_r(wps, &eattr)) {
2842                 wpabuf_free(decrypted);
2843                 wps->state = SEND_WSC_NACK;
2844                 return WPS_CONTINUE;
2845         }
2846
2847         wpabuf_free(decrypted);
2848
2849         wps->state = SEND_M8;
2850         return WPS_CONTINUE;
2851 }
2852
2853
2854 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2855                                                 const struct wpabuf *msg)
2856 {
2857         struct wps_parse_attr attr;
2858         enum wps_process_res ret = WPS_CONTINUE;
2859
2860         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2861
2862         if (wps_parse_msg(msg, &attr) < 0)
2863                 return WPS_FAILURE;
2864
2865         if (attr.msg_type == NULL) {
2866                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2867                 wps->state = SEND_WSC_NACK;
2868                 return WPS_CONTINUE;
2869         }
2870
2871         if (*attr.msg_type != WPS_M1 &&
2872             (attr.registrar_nonce == NULL ||
2873              os_memcmp(wps->nonce_r, attr.registrar_nonce,
2874                        WPS_NONCE_LEN) != 0)) {
2875                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2876                 return WPS_FAILURE;
2877         }
2878
2879         switch (*attr.msg_type) {
2880         case WPS_M1:
2881                 if (wps_validate_m1(msg) < 0)
2882                         return WPS_FAILURE;
2883 #ifdef CONFIG_WPS_UPNP
2884                 if (wps->wps->wps_upnp && attr.mac_addr) {
2885                         /* Remove old pending messages when starting new run */
2886                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2887                         wps->wps->upnp_msgs = NULL;
2888
2889                         upnp_wps_device_send_wlan_event(
2890                                 wps->wps->wps_upnp, attr.mac_addr,
2891                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2892                 }
2893 #endif /* CONFIG_WPS_UPNP */
2894                 ret = wps_process_m1(wps, &attr);
2895                 break;
2896         case WPS_M3:
2897                 if (wps_validate_m3(msg) < 0)
2898                         return WPS_FAILURE;
2899                 ret = wps_process_m3(wps, msg, &attr);
2900                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2901                         wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2902                                        wps->error_indication);
2903                 break;
2904         case WPS_M5:
2905                 if (wps_validate_m5(msg) < 0)
2906                         return WPS_FAILURE;
2907                 ret = wps_process_m5(wps, msg, &attr);
2908                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2909                         wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2910                                        wps->error_indication);
2911                 break;
2912         case WPS_M7:
2913                 if (wps_validate_m7(msg) < 0)
2914                         return WPS_FAILURE;
2915                 ret = wps_process_m7(wps, msg, &attr);
2916                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2917                         wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2918                                        wps->error_indication);
2919                 break;
2920         default:
2921                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2922                            *attr.msg_type);
2923                 return WPS_FAILURE;
2924         }
2925
2926         if (ret == WPS_CONTINUE) {
2927                 /* Save a copy of the last message for Authenticator derivation
2928                  */
2929                 wpabuf_free(wps->last_msg);
2930                 wps->last_msg = wpabuf_dup(msg);
2931         }
2932
2933         return ret;
2934 }
2935
2936
2937 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2938                                                 const struct wpabuf *msg)
2939 {
2940         struct wps_parse_attr attr;
2941
2942         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2943
2944         if (wps_parse_msg(msg, &attr) < 0)
2945                 return WPS_FAILURE;
2946
2947         if (attr.msg_type == NULL) {
2948                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2949                 return WPS_FAILURE;
2950         }
2951
2952         if (*attr.msg_type != WPS_WSC_ACK) {
2953                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2954                            *attr.msg_type);
2955                 return WPS_FAILURE;
2956         }
2957
2958 #ifdef CONFIG_WPS_UPNP
2959         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2960             upnp_wps_subscribers(wps->wps->wps_upnp)) {
2961                 if (wps->wps->upnp_msgs)
2962                         return WPS_CONTINUE;
2963                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2964                            "external Registrar");
2965                 return WPS_PENDING;
2966         }
2967 #endif /* CONFIG_WPS_UPNP */
2968
2969         if (attr.registrar_nonce == NULL ||
2970             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
2971         {
2972                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2973                 return WPS_FAILURE;
2974         }
2975
2976         if (attr.enrollee_nonce == NULL ||
2977             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
2978                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2979                 return WPS_FAILURE;
2980         }
2981
2982         if (wps->state == RECV_M2D_ACK) {
2983 #ifdef CONFIG_WPS_UPNP
2984                 if (wps->wps->wps_upnp &&
2985                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
2986                         if (wps->wps->upnp_msgs)
2987                                 return WPS_CONTINUE;
2988                         if (wps->ext_reg == 0)
2989                                 wps->ext_reg = 1;
2990                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2991                                    "external Registrar");
2992                         return WPS_PENDING;
2993                 }
2994 #endif /* CONFIG_WPS_UPNP */
2995
2996                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2997                            "terminate negotiation");
2998         }
2999
3000         return WPS_FAILURE;
3001 }
3002
3003
3004 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3005                                                  const struct wpabuf *msg)
3006 {
3007         struct wps_parse_attr attr;
3008         int old_state;
3009         u16 config_error;
3010
3011         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3012
3013         old_state = wps->state;
3014         wps->state = SEND_WSC_NACK;
3015
3016         if (wps_parse_msg(msg, &attr) < 0)
3017                 return WPS_FAILURE;
3018
3019         if (attr.msg_type == NULL) {
3020                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3021                 return WPS_FAILURE;
3022         }
3023
3024         if (*attr.msg_type != WPS_WSC_NACK) {
3025                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3026                            *attr.msg_type);
3027                 return WPS_FAILURE;
3028         }
3029
3030 #ifdef CONFIG_WPS_UPNP
3031         if (wps->wps->wps_upnp && wps->ext_reg) {
3032                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3033                            "Registrar terminated by the Enrollee");
3034                 return WPS_FAILURE;
3035         }
3036 #endif /* CONFIG_WPS_UPNP */
3037
3038         if (attr.registrar_nonce == NULL ||
3039             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3040         {
3041                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3042                 return WPS_FAILURE;
3043         }
3044
3045         if (attr.enrollee_nonce == NULL ||
3046             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3047                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3048                 return WPS_FAILURE;
3049         }
3050
3051         if (attr.config_error == NULL) {
3052                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3053                            "in WSC_NACK");
3054                 return WPS_FAILURE;
3055         }
3056
3057         config_error = WPA_GET_BE16(attr.config_error);
3058         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3059                    "Configuration Error %d", config_error);
3060
3061         switch (old_state) {
3062         case RECV_M3:
3063                 wps_fail_event(wps->wps, WPS_M2, config_error,
3064                                wps->error_indication);
3065                 break;
3066         case RECV_M5:
3067                 wps_fail_event(wps->wps, WPS_M4, config_error,
3068                                wps->error_indication);
3069                 break;
3070         case RECV_M7:
3071                 wps_fail_event(wps->wps, WPS_M6, config_error,
3072                                wps->error_indication);
3073                 break;
3074         case RECV_DONE:
3075                 wps_fail_event(wps->wps, WPS_M8, config_error,
3076                                wps->error_indication);
3077                 break;
3078         default:
3079                 break;
3080         }
3081
3082         return WPS_FAILURE;
3083 }
3084
3085
3086 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3087                                                  const struct wpabuf *msg)
3088 {
3089         struct wps_parse_attr attr;
3090
3091         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3092
3093         if (wps->state != RECV_DONE &&
3094             (!wps->wps->wps_upnp || !wps->ext_reg)) {
3095                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3096                            "receiving WSC_Done", wps->state);
3097                 return WPS_FAILURE;
3098         }
3099
3100         if (wps_parse_msg(msg, &attr) < 0)
3101                 return WPS_FAILURE;
3102
3103         if (attr.msg_type == NULL) {
3104                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3105                 return WPS_FAILURE;
3106         }
3107
3108         if (*attr.msg_type != WPS_WSC_DONE) {
3109                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3110                            *attr.msg_type);
3111                 return WPS_FAILURE;
3112         }
3113
3114 #ifdef CONFIG_WPS_UPNP
3115         if (wps->wps->wps_upnp && wps->ext_reg) {
3116                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3117                            "Registrar completed successfully");
3118                 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3119                                  wps->uuid_e);
3120                 return WPS_DONE;
3121         }
3122 #endif /* CONFIG_WPS_UPNP */
3123
3124         if (attr.registrar_nonce == NULL ||
3125             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3126         {
3127                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3128                 return WPS_FAILURE;
3129         }
3130
3131         if (attr.enrollee_nonce == NULL ||
3132             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3133                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3134                 return WPS_FAILURE;
3135         }
3136
3137         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3138         wps_device_store(wps->wps->registrar, &wps->peer_dev,
3139                          wps->uuid_e);
3140
3141         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3142             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3143                 struct wps_credential cred;
3144
3145                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3146                            "on first Enrollee connection");
3147
3148                 os_memset(&cred, 0, sizeof(cred));
3149                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3150                 cred.ssid_len = wps->wps->ssid_len;
3151                 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3152                 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3153                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3154                 cred.key_len = wps->new_psk_len;
3155
3156                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3157                 wpa_hexdump_ascii_key(MSG_DEBUG,
3158                                       "WPS: Generated random passphrase",
3159                                       wps->new_psk, wps->new_psk_len);
3160                 if (wps->wps->cred_cb)
3161                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3162
3163                 os_free(wps->new_psk);
3164                 wps->new_psk = NULL;
3165         }
3166
3167         if (!wps->wps->ap && !wps->er)
3168                 wps_sta_cred_cb(wps);
3169
3170         if (wps->new_psk) {
3171                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3172                                    wps->new_psk, wps->new_psk_len)) {
3173                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3174                                    "new PSK");
3175                 }
3176                 os_free(wps->new_psk);
3177                 wps->new_psk = NULL;
3178         }
3179
3180         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3181                            wps->dev_password, wps->dev_password_len);
3182
3183         if (wps->pbc) {
3184                 wps_registrar_remove_pbc_session(wps->wps->registrar,
3185                                                  wps->uuid_e,
3186                                                  wps->p2p_dev_addr);
3187                 wps_registrar_pbc_completed(wps->wps->registrar);
3188                 os_get_time(&wps->wps->registrar->pbc_ignore_start);
3189                 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3190                           WPS_UUID_LEN);
3191         } else {
3192                 wps_registrar_pin_completed(wps->wps->registrar);
3193         }
3194         /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3195          * merge them into APs own list.. */
3196
3197         wps_success_event(wps->wps);
3198
3199         return WPS_DONE;
3200 }
3201
3202
3203 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3204                                                enum wsc_op_code op_code,
3205                                                const struct wpabuf *msg)
3206 {
3207         enum wps_process_res ret;
3208
3209         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3210                    "op_code=%d)",
3211                    (unsigned long) wpabuf_len(msg), op_code);
3212
3213 #ifdef CONFIG_WPS_UPNP
3214         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3215                 struct wps_parse_attr attr;
3216                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3217                     *attr.msg_type == WPS_M3)
3218                         wps->ext_reg = 2; /* past M2/M2D phase */
3219         }
3220         if (wps->ext_reg > 1)
3221                 wps_registrar_free_pending_m2(wps->wps);
3222         if (wps->wps->wps_upnp && wps->ext_reg &&
3223             wps->wps->upnp_msgs == NULL &&
3224             (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3225         {
3226                 struct wps_parse_attr attr;
3227                 int type;
3228                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3229                         type = -1;
3230                 else
3231                         type = *attr.msg_type;
3232                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3233                            " to external Registrar for processing", type);
3234                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3235                                                 wps->mac_addr_e,
3236                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
3237                                                 msg);
3238                 if (op_code == WSC_MSG)
3239                         return WPS_PENDING;
3240         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3241                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3242                            "external Registrar");
3243                 return WPS_CONTINUE;
3244         }
3245 #endif /* CONFIG_WPS_UPNP */
3246
3247         switch (op_code) {
3248         case WSC_MSG:
3249                 return wps_process_wsc_msg(wps, msg);
3250         case WSC_ACK:
3251                 if (wps_validate_wsc_ack(msg) < 0)
3252                         return WPS_FAILURE;
3253                 return wps_process_wsc_ack(wps, msg);
3254         case WSC_NACK:
3255                 if (wps_validate_wsc_nack(msg) < 0)
3256                         return WPS_FAILURE;
3257                 return wps_process_wsc_nack(wps, msg);
3258         case WSC_Done:
3259                 if (wps_validate_wsc_done(msg) < 0)
3260                         return WPS_FAILURE;
3261                 ret = wps_process_wsc_done(wps, msg);
3262                 if (ret == WPS_FAILURE) {
3263                         wps->state = SEND_WSC_NACK;
3264                         wps_fail_event(wps->wps, WPS_WSC_DONE,
3265                                        wps->config_error,
3266                                        wps->error_indication);
3267                 }
3268                 return ret;
3269         default:
3270                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3271                 return WPS_FAILURE;
3272         }
3273 }
3274
3275
3276 int wps_registrar_update_ie(struct wps_registrar *reg)
3277 {
3278         return wps_set_ie(reg);
3279 }
3280
3281
3282 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3283                                                void *timeout_ctx)
3284 {
3285         struct wps_registrar *reg = eloop_ctx;
3286
3287         wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3288                    "unselect internal Registrar");
3289         reg->selected_registrar = 0;
3290         reg->pbc = 0;
3291         wps_registrar_selected_registrar_changed(reg);
3292 }
3293
3294
3295 #ifdef CONFIG_WPS_UPNP
3296 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3297                                       struct subscription *s)
3298 {
3299         int i, j;
3300         wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3301                    "config_methods=0x%x)",
3302                    s->dev_password_id, s->config_methods);
3303         reg->sel_reg_union = 1;
3304         if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3305                 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3306         if (reg->sel_reg_config_methods_override == -1)
3307                 reg->sel_reg_config_methods_override = 0;
3308         reg->sel_reg_config_methods_override |= s->config_methods;
3309         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3310                 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3311                         break;
3312         for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3313              j++) {
3314                 if (is_zero_ether_addr(s->authorized_macs[j]))
3315                         break;
3316                 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3317                            MACSTR, MAC2STR(s->authorized_macs[j]));
3318                 os_memcpy(reg->authorized_macs_union[i],
3319                           s->authorized_macs[j], ETH_ALEN);
3320                 i++;
3321         }
3322         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3323                     (u8 *) reg->authorized_macs_union,
3324                     sizeof(reg->authorized_macs_union));
3325 }
3326 #endif /* CONFIG_WPS_UPNP */
3327
3328
3329 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3330 {
3331 #ifdef CONFIG_WPS_UPNP
3332         struct subscription *s;
3333
3334         if (reg->wps->wps_upnp == NULL)
3335                 return;
3336
3337         dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3338                          struct subscription, list) {
3339                 struct subscr_addr *sa;
3340                 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3341                 if (sa) {
3342                         wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3343                                    inet_ntoa(sa->saddr.sin_addr),
3344                                    ntohs(sa->saddr.sin_port));
3345                 }
3346                 if (s->selected_registrar)
3347                         wps_registrar_sel_reg_add(reg, s);
3348                 else
3349                         wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3350                                    "selected");
3351         }
3352 #endif /* CONFIG_WPS_UPNP */
3353 }
3354
3355
3356 /**
3357  * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3358  * @reg: Registrar data from wps_registrar_init()
3359  *
3360  * This function is called when selected registrar state changes, e.g., when an
3361  * AP receives a SetSelectedRegistrar UPnP message.
3362  */
3363 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3364 {
3365         wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3366
3367         reg->sel_reg_union = reg->selected_registrar;
3368         reg->sel_reg_dev_password_id_override = -1;
3369         reg->sel_reg_config_methods_override = -1;
3370         os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3371                   WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3372         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3373                     (u8 *) reg->authorized_macs_union,
3374                     sizeof(reg->authorized_macs_union));
3375         if (reg->selected_registrar) {
3376                 u16 methods;
3377
3378                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3379 #ifdef CONFIG_WPS2
3380                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3381                              WPS_CONFIG_PHY_PUSHBUTTON);
3382 #endif /* CONFIG_WPS2 */
3383                 if (reg->pbc) {
3384                         reg->sel_reg_dev_password_id_override =
3385                                 DEV_PW_PUSHBUTTON;
3386                         wps_set_pushbutton(&methods, reg->wps->config_methods);
3387                 }
3388                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3389                            "(pbc=%d)", reg->pbc);
3390                 reg->sel_reg_config_methods_override = methods;
3391         } else
3392                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3393
3394         wps_registrar_sel_reg_union(reg);
3395
3396         wps_set_ie(reg);
3397         wps_cb_set_sel_reg(reg);
3398 }
3399
3400
3401 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3402                            char *buf, size_t buflen)
3403 {
3404         struct wps_registrar_device *d;
3405         int len = 0, ret;
3406         char uuid[40];
3407         char devtype[WPS_DEV_TYPE_BUFSIZE];
3408
3409         d = wps_device_get(reg, addr);
3410         if (d == NULL)
3411                 return 0;
3412         if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3413                 return 0;
3414
3415         ret = os_snprintf(buf + len, buflen - len,
3416                           "wpsUuid=%s\n"
3417                           "wpsPrimaryDeviceType=%s\n"
3418                           "wpsDeviceName=%s\n"
3419                           "wpsManufacturer=%s\n"
3420                           "wpsModelName=%s\n"
3421                           "wpsModelNumber=%s\n"
3422                           "wpsSerialNumber=%s\n",
3423                           uuid,
3424                           wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3425                                                sizeof(devtype)),
3426                           d->dev.device_name ? d->dev.device_name : "",
3427                           d->dev.manufacturer ? d->dev.manufacturer : "",
3428                           d->dev.model_name ? d->dev.model_name : "",
3429                           d->dev.model_number ? d->dev.model_number : "",
3430                           d->dev.serial_number ? d->dev.serial_number : "");
3431         if (ret < 0 || (size_t) ret >= buflen - len)
3432                 return len;
3433         len += ret;
3434
3435         return len;
3436 }
3437
3438
3439 int wps_registrar_config_ap(struct wps_registrar *reg,
3440                             struct wps_credential *cred)
3441 {
3442 #ifdef CONFIG_WPS2
3443         printf("encr_type=0x%x\n", cred->encr_type);
3444         if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3445                                  WPS_ENCR_AES))) {
3446                 if (cred->encr_type & WPS_ENCR_WEP) {
3447                         wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3448                                    "due to WEP configuration");
3449                         return -1;
3450                 }
3451
3452                 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3453                            "invalid encr_type 0x%x", cred->encr_type);
3454                 return -1;
3455         }
3456
3457         if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3458             WPS_ENCR_TKIP) {
3459                 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3460                            "TKIP+AES");
3461                 cred->encr_type |= WPS_ENCR_AES;
3462         }
3463
3464         if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3465             WPS_AUTH_WPAPSK) {
3466                 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3467                            "WPAPSK+WPA2PSK");
3468                 cred->auth_type |= WPS_AUTH_WPA2PSK;
3469         }
3470 #endif /* CONFIG_WPS2 */
3471
3472         if (reg->wps->cred_cb)
3473                 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3474
3475         return -1;
3476 }
3477
3478
3479 #ifdef CONFIG_WPS_NFC
3480
3481 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3482                                    const u8 *pubkey_hash, u16 pw_id,
3483                                    const u8 *dev_pw, size_t dev_pw_len)
3484 {
3485         struct wps_nfc_pw_token *token;
3486
3487         if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3488                 return -1;
3489
3490         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, pw_id);
3491
3492         token = os_zalloc(sizeof(*token));
3493         if (token == NULL)
3494                 return -1;
3495
3496         os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
3497         token->pw_id = pw_id;
3498         os_memcpy(token->dev_pw, dev_pw, dev_pw_len);
3499         token->dev_pw_len = dev_pw_len;
3500
3501         dl_list_add(&reg->nfc_pw_tokens, &token->list);
3502
3503         reg->selected_registrar = 1;
3504         reg->pbc = 0;
3505         wps_registrar_add_authorized_mac(reg,
3506                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
3507         wps_registrar_selected_registrar_changed(reg);
3508         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3509         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3510                                wps_registrar_set_selected_timeout,
3511                                reg, NULL);
3512
3513         return 0;
3514 }
3515
3516
3517 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3518                                          const u8 *oob_dev_pw,
3519                                          size_t oob_dev_pw_len)
3520 {
3521         const u8 *pos, *hash, *dev_pw;
3522         u16 id;
3523         size_t dev_pw_len;
3524
3525         if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 +
3526             WPS_OOB_DEVICE_PASSWORD_MIN_LEN ||
3527             oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3528             WPS_OOB_DEVICE_PASSWORD_LEN)
3529                 return -1;
3530
3531         hash = oob_dev_pw;
3532         pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3533         id = WPA_GET_BE16(pos);
3534         dev_pw = pos + 2;
3535         dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3536
3537         wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3538                    id);
3539
3540         wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3541                     hash, WPS_OOB_PUBKEY_HASH_LEN);
3542         wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3543
3544         return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3545                                               dev_pw_len);
3546 }
3547
3548
3549 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3550                                        struct wps_nfc_pw_token *token)
3551 {
3552         wps_registrar_remove_authorized_mac(reg,
3553                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
3554         wps_registrar_selected_registrar_changed(reg);
3555 }
3556
3557 #endif /* CONFIG_WPS_NFC */