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