src/wps/wps_registrar.c

   1 /*
   2  * Wi-Fi Protected Setup - Registrar
   3  * Copyright (c) 2008-2013, 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         unsigned int peer_pk_hash_known:1;
  35         u16 pw_id;
  36         u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1];
  37         size_t dev_pw_len;
  38         int pk_hash_provided_oob; /* whether own PK hash was provided OOB */
  39 };
  40
  41
  42 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
  43 {
  44         dl_list_del(&token->list);
  45         os_free(token);
  46 }
  47
  48
  49 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
  50 {
  51         struct wps_nfc_pw_token *token, *prev;
  52         dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
  53                               list) {
  54                 if (pw_id == 0 || pw_id == token->pw_id)
  55                         wps_remove_nfc_pw_token(token);
  56         }
  57 }
  58
  59
  60 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
  61                                                       u16 pw_id)
  62 {
  63         struct wps_nfc_pw_token *token;
  64         dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
  65                 if (pw_id == token->pw_id)
  66                         return token;
  67         }
  68         return NULL;
  69 }
  70
  71 #else /* CONFIG_WPS_NFC */
  72
  73 #define wps_free_nfc_pw_tokens(t, p) do { } while (0)
  74
  75 #endif /* CONFIG_WPS_NFC */
  76
  77
  78 struct wps_uuid_pin {
  79         struct dl_list list;
  80         u8 uuid[WPS_UUID_LEN];
  81         int wildcard_uuid;
  82         u8 *pin;
  83         size_t pin_len;
  84 #define PIN_LOCKED BIT(0)
  85 #define PIN_EXPIRES BIT(1)
  86         int flags;
  87         struct os_reltime expiration;
  88         u8 enrollee_addr[ETH_ALEN];
  89 };
  90
  91
  92 static void wps_free_pin(struct wps_uuid_pin *pin)
  93 {
  94         os_free(pin->pin);
  95         os_free(pin);
  96 }
  97
  98
  99 static void wps_remove_pin(struct wps_uuid_pin *pin)
 100 {
 101         dl_list_del(&pin->list);
 102         wps_free_pin(pin);
 103 }
 104
 105
 106 static void wps_free_pins(struct dl_list *pins)
 107 {
 108         struct wps_uuid_pin *pin, *prev;
 109         dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
 110                 wps_remove_pin(pin);
 111 }
 112
 113
 114 struct wps_pbc_session {
 115         struct wps_pbc_session *next;
 116         u8 addr[ETH_ALEN];
 117         u8 uuid_e[WPS_UUID_LEN];
 118         struct os_reltime timestamp;
 119 };
 120
 121
 122 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
 123 {
 124         struct wps_pbc_session *prev;
 125
 126         while (pbc) {
 127                 prev = pbc;
 128                 pbc = pbc->next;
 129                 os_free(prev);
 130         }
 131 }
 132
 133
 134 struct wps_registrar_device {
 135         struct wps_registrar_device *next;
 136         struct wps_device_data dev;
 137         u8 uuid[WPS_UUID_LEN];
 138 };
 139
 140
 141 struct wps_registrar {
 142         struct wps_context *wps;
 143
 144         int pbc;
 145         int selected_registrar;
 146
 147         int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr,
 148                           const u8 *psk, size_t psk_len);
 149         int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
 150                          struct wpabuf *probe_resp_ie);
 151         void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
 152                               const struct wps_device_data *dev);
 153         void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
 154                                const u8 *uuid_e, const u8 *dev_pw,
 155                                size_t dev_pw_len);
 156         void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
 157                                u16 sel_reg_config_methods);
 158         void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
 159                                  const u8 *pri_dev_type, u16 config_methods,
 160                                  u16 dev_password_id, u8 request_type,
 161                                  const char *dev_name);
 162         void *cb_ctx;
 163
 164         struct dl_list pins;
 165         struct dl_list nfc_pw_tokens;
 166         struct wps_pbc_session *pbc_sessions;
 167
 168         int skip_cred_build;
 169         struct wpabuf *extra_cred;
 170         int disable_auto_conf;
 171         int sel_reg_union;
 172         int sel_reg_dev_password_id_override;
 173         int sel_reg_config_methods_override;
 174         int static_wep_only;
 175         int dualband;
 176         int force_per_enrollee_psk;
 177
 178         struct wps_registrar_device *devices;
 179
 180         int force_pbc_overlap;
 181
 182         u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 183         u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 184
 185         u8 p2p_dev_addr[ETH_ALEN];
 186
 187         u8 pbc_ignore_uuid[WPS_UUID_LEN];
 188 #ifdef WPS_WORKAROUNDS
 189         struct os_reltime pbc_ignore_start;
 190 #endif /* WPS_WORKAROUNDS */
 191 };
 192
 193
 194 static int wps_set_ie(struct wps_registrar *reg);
 195 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
 196 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
 197                                                void *timeout_ctx);
 198 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 199                                      struct wps_uuid_pin *pin);
 200
 201
 202 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
 203                                              const u8 *addr)
 204 {
 205         int i;
 206         wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
 207                    MAC2STR(addr));
 208         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
 209                 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
 210                         wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
 211                                    "already in the list");
 212                         return; /* already in list */
 213                 }
 214         for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
 215                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
 216                           ETH_ALEN);
 217         os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
 218         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 219                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 220 }
 221
 222
 223 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
 224                                                 const u8 *addr)
 225 {
 226         int i;
 227         wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
 228                    MAC2STR(addr));
 229         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
 230                 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
 231                         break;
 232         }
 233         if (i == WPS_MAX_AUTHORIZED_MACS) {
 234                 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
 235                            "list");
 236                 return; /* not in the list */
 237         }
 238         for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
 239                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
 240                           ETH_ALEN);
 241         os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
 242                   ETH_ALEN);
 243         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 244                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 245 }
 246
 247
 248 static void wps_free_devices(struct wps_registrar_device *dev)
 249 {
 250         struct wps_registrar_device *prev;
 251
 252         while (dev) {
 253                 prev = dev;
 254                 dev = dev->next;
 255                 wps_device_data_free(&prev->dev);
 256                 os_free(prev);
 257         }
 258 }
 259
 260
 261 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
 262                                                     const u8 *addr)
 263 {
 264         struct wps_registrar_device *dev;
 265
 266         for (dev = reg->devices; dev; dev = dev->next) {
 267                 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
 268                         return dev;
 269         }
 270         return NULL;
 271 }
 272
 273
 274 static void wps_device_clone_data(struct wps_device_data *dst,
 275                                   struct wps_device_data *src)
 276 {
 277         os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
 278         os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
 279
 280 #define WPS_STRDUP(n) \
 281         os_free(dst->n); \
 282         dst->n = src->n ? os_strdup(src->n) : NULL
 283
 284         WPS_STRDUP(device_name);
 285         WPS_STRDUP(manufacturer);
 286         WPS_STRDUP(model_name);
 287         WPS_STRDUP(model_number);
 288         WPS_STRDUP(serial_number);
 289 #undef WPS_STRDUP
 290 }
 291
 292
 293 int wps_device_store(struct wps_registrar *reg,
 294                      struct wps_device_data *dev, const u8 *uuid)
 295 {
 296         struct wps_registrar_device *d;
 297
 298         d = wps_device_get(reg, dev->mac_addr);
 299         if (d == NULL) {
 300                 d = os_zalloc(sizeof(*d));
 301                 if (d == NULL)
 302                         return -1;
 303                 d->next = reg->devices;
 304                 reg->devices = d;
 305         }
 306
 307         wps_device_clone_data(&d->dev, dev);
 308         os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
 309
 310         return 0;
 311 }
 312
 313
 314 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
 315                                           const u8 *addr, const u8 *uuid_e)
 316 {
 317         struct wps_pbc_session *pbc, *prev = NULL;
 318         struct os_reltime now;
 319
 320         os_get_reltime(&now);
 321
 322         pbc = reg->pbc_sessions;
 323         while (pbc) {
 324                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 325                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 326                         if (prev)
 327                                 prev->next = pbc->next;
 328                         else
 329                                 reg->pbc_sessions = pbc->next;
 330                         break;
 331                 }
 332                 prev = pbc;
 333                 pbc = pbc->next;
 334         }
 335
 336         if (!pbc) {
 337                 pbc = os_zalloc(sizeof(*pbc));
 338                 if (pbc == NULL)
 339                         return;
 340                 os_memcpy(pbc->addr, addr, ETH_ALEN);
 341                 if (uuid_e)
 342                         os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
 343         }
 344
 345         pbc->next = reg->pbc_sessions;
 346         reg->pbc_sessions = pbc;
 347         pbc->timestamp = now;
 348
 349         /* remove entries that have timed out */
 350         prev = pbc;
 351         pbc = pbc->next;
 352
 353         while (pbc) {
 354                 if (os_reltime_expired(&now, &pbc->timestamp,
 355                                        WPS_PBC_WALK_TIME)) {
 356                         prev->next = NULL;
 357                         wps_free_pbc_sessions(pbc);
 358                         break;
 359                 }
 360                 prev = pbc;
 361                 pbc = pbc->next;
 362         }
 363 }
 364
 365
 366 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
 367                                              const u8 *uuid_e,
 368                                              const u8 *p2p_dev_addr)
 369 {
 370         struct wps_pbc_session *pbc, *prev = NULL, *tmp;
 371
 372         pbc = reg->pbc_sessions;
 373         while (pbc) {
 374                 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
 375                     (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
 376                      os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
 377                      0)) {
 378                         if (prev)
 379                                 prev->next = pbc->next;
 380                         else
 381                                 reg->pbc_sessions = pbc->next;
 382                         tmp = pbc;
 383                         pbc = pbc->next;
 384                         wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
 385                                    "addr=" MACSTR, MAC2STR(tmp->addr));
 386                         wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
 387                                     tmp->uuid_e, WPS_UUID_LEN);
 388                         os_free(tmp);
 389                         continue;
 390                 }
 391                 prev = pbc;
 392                 pbc = pbc->next;
 393         }
 394 }
 395
 396
 397 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
 398                               const u8 *addr, const u8 *uuid_e)
 399 {
 400         int count = 0;
 401         struct wps_pbc_session *pbc;
 402         struct wps_pbc_session *first = NULL;
 403         struct os_reltime now;
 404
 405         os_get_reltime(&now);
 406
 407         wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
 408
 409         if (uuid_e) {
 410                 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
 411                 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
 412                             uuid_e, WPS_UUID_LEN);
 413                 count++;
 414         }
 415
 416         for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
 417                 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
 418                            MAC2STR(pbc->addr));
 419                 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
 420                             pbc->uuid_e, WPS_UUID_LEN);
 421                 if (os_reltime_expired(&now, &pbc->timestamp,
 422                                        WPS_PBC_WALK_TIME)) {
 423                         wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired");
 424                         break;
 425                 }
 426                 if (first &&
 427                     os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
 428                         wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
 429                         continue; /* same Enrollee */
 430                 }
 431                 if (uuid_e == NULL ||
 432                     os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
 433                         wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
 434                         count++;
 435                 }
 436                 if (first == NULL)
 437                         first = pbc;
 438         }
 439
 440         wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
 441
 442         return count > 1 ? 1 : 0;
 443 }
 444
 445
 446 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
 447 {
 448         wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
 449                    wps->wps_state);
 450         wpabuf_put_be16(msg, ATTR_WPS_STATE);
 451         wpabuf_put_be16(msg, 1);
 452         wpabuf_put_u8(msg, wps->wps_state);
 453         return 0;
 454 }
 455
 456
 457 #ifdef CONFIG_WPS_UPNP
 458 static void wps_registrar_free_pending_m2(struct wps_context *wps)
 459 {
 460         struct upnp_pending_message *p, *p2, *prev = NULL;
 461         p = wps->upnp_msgs;
 462         while (p) {
 463                 if (p->type == WPS_M2 || p->type == WPS_M2D) {
 464                         if (prev == NULL)
 465                                 wps->upnp_msgs = p->next;
 466                         else
 467                                 prev->next = p->next;
 468                         wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
 469                         p2 = p;
 470                         p = p->next;
 471                         wpabuf_free(p2->msg);
 472                         os_free(p2);
 473                         continue;
 474                 }
 475                 prev = p;
 476                 p = p->next;
 477         }
 478 }
 479 #endif /* CONFIG_WPS_UPNP */
 480
 481
 482 static int wps_build_ap_setup_locked(struct wps_context *wps,
 483                                      struct wpabuf *msg)
 484 {
 485         if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
 486                 wpa_printf(MSG_DEBUG, "WPS:  * AP Setup Locked");
 487                 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
 488                 wpabuf_put_be16(msg, 1);
 489                 wpabuf_put_u8(msg, 1);
 490         }
 491         return 0;
 492 }
 493
 494
 495 static int wps_build_selected_registrar(struct wps_registrar *reg,
 496                                         struct wpabuf *msg)
 497 {
 498         if (!reg->sel_reg_union)
 499                 return 0;
 500         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar");
 501         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
 502         wpabuf_put_be16(msg, 1);
 503         wpabuf_put_u8(msg, 1);
 504         return 0;
 505 }
 506
 507
 508 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
 509                                              struct wpabuf *msg)
 510 {
 511         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 512         if (!reg->sel_reg_union)
 513                 return 0;
 514         if (reg->sel_reg_dev_password_id_override >= 0)
 515                 id = reg->sel_reg_dev_password_id_override;
 516         wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
 517         wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
 518         wpabuf_put_be16(msg, 2);
 519         wpabuf_put_be16(msg, id);
 520         return 0;
 521 }
 522
 523
 524 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
 525                                         struct wpabuf *msg)
 526 {
 527         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 528         if (!reg->sel_reg_union)
 529                 return 0;
 530         if (reg->sel_reg_dev_password_id_override >= 0)
 531                 id = reg->sel_reg_dev_password_id_override;
 532         if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
 533                 return 0;
 534         return wps_build_uuid_e(msg, reg->wps->uuid);
 535 }
 536
 537
 538 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
 539 {
 540         *methods |= WPS_CONFIG_PUSHBUTTON;
 541         if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
 542             WPS_CONFIG_VIRT_PUSHBUTTON)
 543                 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
 544         if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
 545             WPS_CONFIG_PHY_PUSHBUTTON)
 546                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 547         if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
 548             WPS_CONFIG_VIRT_PUSHBUTTON &&
 549             (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
 550             WPS_CONFIG_PHY_PUSHBUTTON) {
 551                 /*
 552                  * Required to include virtual/physical flag, but we were not
 553                  * configured with push button type, so have to default to one
 554                  * of them.
 555                  */
 556                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 557         }
 558 }
 559
 560
 561 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
 562                                             struct wpabuf *msg)
 563 {
 564         u16 methods;
 565         if (!reg->sel_reg_union)
 566                 return 0;
 567         methods = reg->wps->config_methods;
 568         methods &= ~WPS_CONFIG_PUSHBUTTON;
 569         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 570                      WPS_CONFIG_PHY_PUSHBUTTON);
 571         if (reg->pbc)
 572                 wps_set_pushbutton(&methods, reg->wps->config_methods);
 573         if (reg->sel_reg_config_methods_override >= 0)
 574                 methods = reg->sel_reg_config_methods_override;
 575         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar Config Methods (%x)",
 576                    methods);
 577         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
 578         wpabuf_put_be16(msg, 2);
 579         wpabuf_put_be16(msg, methods);
 580         return 0;
 581 }
 582
 583
 584 static int wps_build_probe_config_methods(struct wps_registrar *reg,
 585                                           struct wpabuf *msg)
 586 {
 587         u16 methods;
 588         /*
 589          * These are the methods that the AP supports as an Enrollee for adding
 590          * external Registrars.
 591          */
 592         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 593         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 594                      WPS_CONFIG_PHY_PUSHBUTTON);
 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         while (*count < WPS_MAX_AUTHORIZED_MACS) {
 615                 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
 616                         break;
 617                 (*count)++;
 618         }
 619
 620         return (const u8 *) reg->authorized_macs_union;
 621 }
 622
 623
 624 /**
 625  * wps_registrar_init - Initialize WPS Registrar data
 626  * @wps: Pointer to longterm WPS context
 627  * @cfg: Registrar configuration
 628  * Returns: Pointer to allocated Registrar data or %NULL on failure
 629  *
 630  * This function is used to initialize WPS Registrar functionality. It can be
 631  * used for a single Registrar run (e.g., when run in a supplicant) or multiple
 632  * runs (e.g., when run as an internal Registrar in an AP). Caller is
 633  * responsible for freeing the returned data with wps_registrar_deinit() when
 634  * Registrar functionality is not needed anymore.
 635  */
 636 struct wps_registrar *
 637 wps_registrar_init(struct wps_context *wps,
 638                    const struct wps_registrar_config *cfg)
 639 {
 640         struct wps_registrar *reg = os_zalloc(sizeof(*reg));
 641         if (reg == NULL)
 642                 return NULL;
 643
 644         dl_list_init(&reg->pins);
 645         dl_list_init(&reg->nfc_pw_tokens);
 646         reg->wps = wps;
 647         reg->new_psk_cb = cfg->new_psk_cb;
 648         reg->set_ie_cb = cfg->set_ie_cb;
 649         reg->pin_needed_cb = cfg->pin_needed_cb;
 650         reg->reg_success_cb = cfg->reg_success_cb;
 651         reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
 652         reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
 653         reg->cb_ctx = cfg->cb_ctx;
 654         reg->skip_cred_build = cfg->skip_cred_build;
 655         if (cfg->extra_cred) {
 656                 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
 657                                                     cfg->extra_cred_len);
 658                 if (reg->extra_cred == NULL) {
 659                         os_free(reg);
 660                         return NULL;
 661                 }
 662         }
 663         reg->disable_auto_conf = cfg->disable_auto_conf;
 664         reg->sel_reg_dev_password_id_override = -1;
 665         reg->sel_reg_config_methods_override = -1;
 666         reg->static_wep_only = cfg->static_wep_only;
 667         reg->dualband = cfg->dualband;
 668         reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
 669
 670         if (wps_set_ie(reg)) {
 671                 wps_registrar_deinit(reg);
 672                 return NULL;
 673         }
 674
 675         return reg;
 676 }
 677
 678
 679 /**
 680  * wps_registrar_deinit - Deinitialize WPS Registrar data
 681  * @reg: Registrar data from wps_registrar_init()
 682  */
 683 void wps_registrar_deinit(struct wps_registrar *reg)
 684 {
 685         if (reg == NULL)
 686                 return;
 687         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 688         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 689         wps_free_pins(&reg->pins);
 690         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, 0);
 691         wps_free_pbc_sessions(reg->pbc_sessions);
 692         wpabuf_free(reg->extra_cred);
 693         wps_free_devices(reg->devices);
 694         os_free(reg);
 695 }
 696
 697
 698 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
 699 {
 700         struct wps_uuid_pin *pin;
 701
 702         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 703                 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
 704                         wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
 705                                    "configured wildcard PIN");
 706                         wps_registrar_remove_pin(reg, pin);
 707                         break;
 708                 }
 709         }
 710 }
 711
 712
 713 /**
 714  * wps_registrar_add_pin - Configure a new PIN for Registrar
 715  * @reg: Registrar data from wps_registrar_init()
 716  * @addr: Enrollee MAC address or %NULL if not known
 717  * @uuid: UUID-E or %NULL for wildcard (any UUID)
 718  * @pin: PIN (Device Password)
 719  * @pin_len: Length of pin in octets
 720  * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
 721  * Returns: 0 on success, -1 on failure
 722  */
 723 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
 724                           const u8 *uuid, const u8 *pin, size_t pin_len,
 725                           int timeout)
 726 {
 727         struct wps_uuid_pin *p;
 728
 729         p = os_zalloc(sizeof(*p));
 730         if (p == NULL)
 731                 return -1;
 732         if (addr)
 733                 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
 734         if (uuid == NULL)
 735                 p->wildcard_uuid = 1;
 736         else
 737                 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
 738         p->pin = os_malloc(pin_len);
 739         if (p->pin == NULL) {
 740                 os_free(p);
 741                 return -1;
 742         }
 743         os_memcpy(p->pin, pin, pin_len);
 744         p->pin_len = pin_len;
 745
 746         if (timeout) {
 747                 p->flags |= PIN_EXPIRES;
 748                 os_get_reltime(&p->expiration);
 749                 p->expiration.sec += timeout;
 750         }
 751
 752         if (p->wildcard_uuid)
 753                 wps_registrar_invalidate_unused(reg);
 754
 755         dl_list_add(&reg->pins, &p->list);
 756
 757         wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
 758                    timeout);
 759         wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
 760         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
 761         reg->selected_registrar = 1;
 762         reg->pbc = 0;
 763         if (addr)
 764                 wps_registrar_add_authorized_mac(reg, addr);
 765         else
 766                 wps_registrar_add_authorized_mac(
 767                         reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
 768         wps_registrar_selected_registrar_changed(reg, 0);
 769         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 770         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
 771                                wps_registrar_set_selected_timeout,
 772                                reg, NULL);
 773
 774         return 0;
 775 }
 776
 777
 778 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 779                                      struct wps_uuid_pin *pin)
 780 {
 781         u8 *addr;
 782         u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 783
 784         if (is_zero_ether_addr(pin->enrollee_addr))
 785                 addr = bcast;
 786         else
 787                 addr = pin->enrollee_addr;
 788         wps_registrar_remove_authorized_mac(reg, addr);
 789         wps_remove_pin(pin);
 790         wps_registrar_selected_registrar_changed(reg, 0);
 791 }
 792
 793
 794 static void wps_registrar_expire_pins(struct wps_registrar *reg)
 795 {
 796         struct wps_uuid_pin *pin, *prev;
 797         struct os_reltime now;
 798
 799         os_get_reltime(&now);
 800         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 801         {
 802                 if ((pin->flags & PIN_EXPIRES) &&
 803                     os_reltime_before(&pin->expiration, &now)) {
 804                         wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
 805                                     pin->uuid, WPS_UUID_LEN);
 806                         wps_registrar_remove_pin(reg, pin);
 807                 }
 808         }
 809 }
 810
 811
 812 /**
 813  * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
 814  * @reg: Registrar data from wps_registrar_init()
 815  * @dev_pw: PIN to search for or %NULL to match any
 816  * @dev_pw_len: Length of dev_pw in octets
 817  * Returns: 0 on success, -1 if not wildcard PIN is enabled
 818  */
 819 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
 820                                                  const u8 *dev_pw,
 821                                                  size_t dev_pw_len)
 822 {
 823         struct wps_uuid_pin *pin, *prev;
 824
 825         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 826         {
 827                 if (dev_pw && pin->pin &&
 828                     (dev_pw_len != pin->pin_len ||
 829                      os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0))
 830                         continue; /* different PIN */
 831                 if (pin->wildcard_uuid) {
 832                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 833                                     pin->uuid, WPS_UUID_LEN);
 834                         wps_registrar_remove_pin(reg, pin);
 835                         return 0;
 836                 }
 837         }
 838
 839         return -1;
 840 }
 841
 842
 843 /**
 844  * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
 845  * @reg: Registrar data from wps_registrar_init()
 846  * @uuid: UUID-E
 847  * Returns: 0 on success, -1 on failure (e.g., PIN not found)
 848  */
 849 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
 850 {
 851         struct wps_uuid_pin *pin, *prev;
 852
 853         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 854         {
 855                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 856                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 857                                     pin->uuid, WPS_UUID_LEN);
 858                         wps_registrar_remove_pin(reg, pin);
 859                         return 0;
 860                 }
 861         }
 862
 863         return -1;
 864 }
 865
 866
 867 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
 868                                         const u8 *uuid, size_t *pin_len)
 869 {
 870         struct wps_uuid_pin *pin, *found = NULL;
 871
 872         wps_registrar_expire_pins(reg);
 873
 874         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 875                 if (!pin->wildcard_uuid &&
 876                     os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 877                         found = pin;
 878                         break;
 879                 }
 880         }
 881
 882         if (!found) {
 883                 /* Check for wildcard UUIDs since none of the UUID-specific
 884                  * PINs matched */
 885                 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 886                         if (pin->wildcard_uuid == 1 ||
 887                             pin->wildcard_uuid == 2) {
 888                                 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
 889                                            "PIN. Assigned it for this UUID-E");
 890                                 pin->wildcard_uuid++;
 891                                 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
 892                                 found = pin;
 893                                 break;
 894                         }
 895                 }
 896         }
 897
 898         if (!found)
 899                 return NULL;
 900
 901         /*
 902          * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
 903          * that could otherwise avoid PIN invalidations.
 904          */
 905         if (found->flags & PIN_LOCKED) {
 906                 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
 907                            "allow concurrent re-use");
 908                 return NULL;
 909         }
 910         *pin_len = found->pin_len;
 911         found->flags |= PIN_LOCKED;
 912         return found->pin;
 913 }
 914
 915
 916 /**
 917  * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
 918  * @reg: Registrar data from wps_registrar_init()
 919  * @uuid: UUID-E
 920  * Returns: 0 on success, -1 on failure
 921  *
 922  * PINs are locked to enforce only one concurrent use. This function unlocks a
 923  * PIN to allow it to be used again. If the specified PIN was configured using
 924  * a wildcard UUID, it will be removed instead of allowing multiple uses.
 925  */
 926 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
 927 {
 928         struct wps_uuid_pin *pin;
 929
 930         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 931                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 932                         if (pin->wildcard_uuid == 3) {
 933                                 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
 934                                            "wildcard PIN");
 935                                 return wps_registrar_invalidate_pin(reg, uuid);
 936                         }
 937                         pin->flags &= ~PIN_LOCKED;
 938                         return 0;
 939                 }
 940         }
 941
 942         return -1;
 943 }
 944
 945
 946 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
 947 {
 948         reg->selected_registrar = 0;
 949         reg->pbc = 0;
 950         os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
 951         wps_registrar_remove_authorized_mac(reg,
 952                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
 953         wps_registrar_selected_registrar_changed(reg, 0);
 954 }
 955
 956
 957 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
 958 {
 959         struct wps_registrar *reg = eloop_ctx;
 960
 961         wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
 962         wps_pbc_timeout_event(reg->wps);
 963         wps_registrar_stop_pbc(reg);
 964 }
 965
 966
 967 /**
 968  * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
 969  * @reg: Registrar data from wps_registrar_init()
 970  * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
 971  *      indicates no such filtering
 972  * Returns: 0 on success, -1 on failure, -2 on session overlap
 973  *
 974  * This function is called on an AP when a push button is pushed to activate
 975  * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
 976  * or when a PBC registration is completed. If more than one Enrollee in active
 977  * PBC mode has been detected during the monitor time (previous 2 minutes), the
 978  * PBC mode is not activated and -2 is returned to indicate session overlap.
 979  * This is skipped if a specific Enrollee is selected.
 980  */
 981 int wps_registrar_button_pushed(struct wps_registrar *reg,
 982                                 const u8 *p2p_dev_addr)
 983 {
 984         if (p2p_dev_addr == NULL &&
 985             wps_registrar_pbc_overlap(reg, NULL, NULL)) {
 986                 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
 987                            "mode");
 988                 wps_pbc_overlap_event(reg->wps);
 989                 return -2;
 990         }
 991         wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
 992         reg->force_pbc_overlap = 0;
 993         reg->selected_registrar = 1;
 994         reg->pbc = 1;
 995         if (p2p_dev_addr)
 996                 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
 997         else
 998                 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
 999         wps_registrar_add_authorized_mac(reg,
1000                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
1001         wps_registrar_selected_registrar_changed(reg, 0);
1002
1003         wps_pbc_active_event(reg->wps);
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         wps_pbc_disable_event(reg->wps);
1018 }
1019
1020
1021 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1022 {
1023         wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1024         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1025         reg->selected_registrar = 0;
1026         wps_registrar_selected_registrar_changed(reg, 0);
1027 }
1028
1029
1030 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1031                             const u8 *dev_pw, size_t dev_pw_len)
1032 {
1033         if (registrar->pbc) {
1034                 wps_registrar_remove_pbc_session(registrar,
1035                                                  uuid_e, NULL);
1036                 wps_registrar_pbc_completed(registrar);
1037 #ifdef WPS_WORKAROUNDS
1038                 os_get_reltime(&registrar->pbc_ignore_start);
1039 #endif /* WPS_WORKAROUNDS */
1040                 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1041         } else {
1042                 wps_registrar_pin_completed(registrar);
1043         }
1044
1045         if (dev_pw &&
1046             wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1047                                                   dev_pw_len) == 0) {
1048                 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1049                                 dev_pw, dev_pw_len);
1050         }
1051 }
1052
1053
1054 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1055 {
1056         if (reg->pbc) {
1057                 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1058                 wps_registrar_pbc_timeout(reg, NULL);
1059                 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1060                 return 1;
1061         } else if (reg->selected_registrar) {
1062                 /* PIN Method */
1063                 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1064                 wps_registrar_pin_completed(reg);
1065                 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1066                 return 1;
1067         }
1068         return 0;
1069 }
1070
1071
1072 /**
1073  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1074  * @reg: Registrar data from wps_registrar_init()
1075  * @addr: MAC address of the Probe Request sender
1076  * @wps_data: WPS IE contents
1077  *
1078  * This function is called on an AP when a Probe Request with WPS IE is
1079  * received. This is used to track PBC mode use and to detect possible overlap
1080  * situation with other WPS APs.
1081  */
1082 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1083                                 const struct wpabuf *wps_data,
1084                                 int p2p_wildcard)
1085 {
1086         struct wps_parse_attr attr;
1087         int skip_add = 0;
1088
1089         wpa_hexdump_buf(MSG_MSGDUMP,
1090                         "WPS: Probe Request with WPS data received",
1091                         wps_data);
1092
1093         if (wps_parse_msg(wps_data, &attr) < 0)
1094                 return;
1095
1096         if (attr.config_methods == NULL) {
1097                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1098                            "Probe Request");
1099                 return;
1100         }
1101
1102         if (attr.dev_password_id == NULL) {
1103                 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1104                            "in Probe Request");
1105                 return;
1106         }
1107
1108         if (reg->enrollee_seen_cb && attr.uuid_e &&
1109             attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1110                 char *dev_name = NULL;
1111                 if (attr.dev_name) {
1112                         dev_name = os_zalloc(attr.dev_name_len + 1);
1113                         if (dev_name) {
1114                                 os_memcpy(dev_name, attr.dev_name,
1115                                           attr.dev_name_len);
1116                         }
1117                 }
1118                 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1119                                       attr.primary_dev_type,
1120                                       WPA_GET_BE16(attr.config_methods),
1121                                       WPA_GET_BE16(attr.dev_password_id),
1122                                       *attr.request_type, dev_name);
1123                 os_free(dev_name);
1124         }
1125
1126         if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1127                 return; /* Not PBC */
1128
1129         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1130                    MACSTR, MAC2STR(addr));
1131         if (attr.uuid_e == NULL) {
1132                 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1133                            "UUID-E included");
1134                 return;
1135         }
1136         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1137                     WPS_UUID_LEN);
1138
1139 #ifdef WPS_WORKAROUNDS
1140         if (reg->pbc_ignore_start.sec &&
1141             os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1142                 struct os_reltime now, dur;
1143                 os_get_reltime(&now);
1144                 os_reltime_sub(&now, &reg->pbc_ignore_start, &dur);
1145                 if (dur.sec >= 0 && dur.sec < 5) {
1146                         wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1147                                    "based on Probe Request from the Enrollee "
1148                                    "that just completed PBC provisioning");
1149                         skip_add = 1;
1150                 } else
1151                         reg->pbc_ignore_start.sec = 0;
1152         }
1153 #endif /* WPS_WORKAROUNDS */
1154
1155         if (!skip_add)
1156                 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1157         if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1158                 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1159                 reg->force_pbc_overlap = 1;
1160                 wps_pbc_overlap_event(reg->wps);
1161         }
1162 }
1163
1164
1165 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1166                    const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1167 {
1168         if (reg->new_psk_cb == NULL)
1169                 return 0;
1170
1171         return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1172                                psk_len);
1173 }
1174
1175
1176 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1177                               const struct wps_device_data *dev)
1178 {
1179         if (reg->pin_needed_cb == NULL)
1180                 return;
1181
1182         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1183 }
1184
1185
1186 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1187                                const u8 *uuid_e, const u8 *dev_pw,
1188                                size_t dev_pw_len)
1189 {
1190         if (reg->reg_success_cb == NULL)
1191                 return;
1192
1193         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1194 }
1195
1196
1197 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1198                          struct wpabuf *probe_resp_ie)
1199 {
1200         return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1201 }
1202
1203
1204 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1205 {
1206         u16 methods = 0;
1207         if (reg->set_sel_reg_cb == NULL)
1208                 return;
1209
1210         if (reg->selected_registrar) {
1211                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1212                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1213                              WPS_CONFIG_PHY_PUSHBUTTON);
1214                 if (reg->pbc)
1215                         wps_set_pushbutton(&methods, reg->wps->config_methods);
1216         }
1217
1218         wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1219                    "config_methods=0x%x pbc=%d methods=0x%x",
1220                    reg->selected_registrar, reg->wps->config_methods,
1221                    reg->pbc, methods);
1222
1223         reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1224                             reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1225                             methods);
1226 }
1227
1228
1229 static int wps_set_ie(struct wps_registrar *reg)
1230 {
1231         struct wpabuf *beacon;
1232         struct wpabuf *probe;
1233         const u8 *auth_macs;
1234         size_t count;
1235         size_t vendor_len = 0;
1236         int i;
1237
1238         if (reg->set_ie_cb == NULL)
1239                 return 0;
1240
1241         for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1242                 if (reg->wps->dev.vendor_ext[i]) {
1243                         vendor_len += 2 + 2;
1244                         vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1245                 }
1246         }
1247
1248         beacon = wpabuf_alloc(400 + vendor_len);
1249         if (beacon == NULL)
1250                 return -1;
1251         probe = wpabuf_alloc(500 + vendor_len);
1252         if (probe == NULL) {
1253                 wpabuf_free(beacon);
1254                 return -1;
1255         }
1256
1257         auth_macs = wps_authorized_macs(reg, &count);
1258
1259         wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1260
1261         if (wps_build_version(beacon) ||
1262             wps_build_wps_state(reg->wps, beacon) ||
1263             wps_build_ap_setup_locked(reg->wps, beacon) ||
1264             wps_build_selected_registrar(reg, beacon) ||
1265             wps_build_sel_reg_dev_password_id(reg, beacon) ||
1266             wps_build_sel_reg_config_methods(reg, beacon) ||
1267             wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1268             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon, 0)) ||
1269             wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1270             wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1271                 wpabuf_free(beacon);
1272                 wpabuf_free(probe);
1273                 return -1;
1274         }
1275
1276 #ifdef CONFIG_P2P
1277         if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1278             wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1279                 wpabuf_free(beacon);
1280                 wpabuf_free(probe);
1281                 return -1;
1282         }
1283 #endif /* CONFIG_P2P */
1284
1285         wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1286
1287         if (wps_build_version(probe) ||
1288             wps_build_wps_state(reg->wps, probe) ||
1289             wps_build_ap_setup_locked(reg->wps, probe) ||
1290             wps_build_selected_registrar(reg, probe) ||
1291             wps_build_sel_reg_dev_password_id(reg, probe) ||
1292             wps_build_sel_reg_config_methods(reg, probe) ||
1293             wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1294                                 WPS_RESP_REGISTRAR) ||
1295             wps_build_uuid_e(probe, reg->wps->uuid) ||
1296             wps_build_device_attrs(&reg->wps->dev, probe) ||
1297             wps_build_probe_config_methods(reg, probe) ||
1298             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, probe, 0)) ||
1299             wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1300             wps_build_vendor_ext(&reg->wps->dev, probe)) {
1301                 wpabuf_free(beacon);
1302                 wpabuf_free(probe);
1303                 return -1;
1304         }
1305
1306         beacon = wps_ie_encapsulate(beacon);
1307         probe = wps_ie_encapsulate(probe);
1308
1309         if (!beacon || !probe) {
1310                 wpabuf_free(beacon);
1311                 wpabuf_free(probe);
1312                 return -1;
1313         }
1314
1315         if (reg->static_wep_only) {
1316                 /*
1317                  * Windows XP and Vista clients can get confused about
1318                  * EAP-Identity/Request when they probe the network with
1319                  * EAPOL-Start. In such a case, they may assume the network is
1320                  * using IEEE 802.1X and prompt user for a certificate while
1321                  * the correct (non-WPS) behavior would be to ask for the
1322                  * static WEP key. As a workaround, use Microsoft Provisioning
1323                  * IE to advertise that legacy 802.1X is not supported.
1324                  */
1325                 const u8 ms_wps[7] = {
1326                         WLAN_EID_VENDOR_SPECIFIC, 5,
1327                         /* Microsoft Provisioning IE (00:50:f2:5) */
1328                         0x00, 0x50, 0xf2, 5,
1329                         0x00 /* no legacy 802.1X or MS WPS */
1330                 };
1331                 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1332                            "into Beacon/Probe Response frames");
1333                 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1334                 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1335         }
1336
1337         return wps_cb_set_ie(reg, beacon, probe);
1338 }
1339
1340
1341 static int wps_get_dev_password(struct wps_data *wps)
1342 {
1343         const u8 *pin;
1344         size_t pin_len = 0;
1345
1346         os_free(wps->dev_password);
1347         wps->dev_password = NULL;
1348
1349         if (wps->pbc) {
1350                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1351                 pin = (const u8 *) "00000000";
1352                 pin_len = 8;
1353 #ifdef CONFIG_WPS_NFC
1354         } else if (wps->nfc_pw_token) {
1355                 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1356                 {
1357                         wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1358                                    "handover and abbreviated WPS handshake "
1359                                    "without Device Password");
1360                         return 0;
1361                 }
1362                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1363                            "Password Token");
1364                 pin = wps->nfc_pw_token->dev_pw;
1365                 pin_len = wps->nfc_pw_token->dev_pw_len;
1366         } else if (wps->dev_pw_id >= 0x10 &&
1367                    wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1368                    wps->wps->ap_nfc_dev_pw) {
1369                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1370                 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1371                 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1372 #endif /* CONFIG_WPS_NFC */
1373         } else {
1374                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1375                                             &pin_len);
1376                 if (pin && wps->dev_pw_id >= 0x10) {
1377                         wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1378                                    "Password ID, but PIN found");
1379                         /*
1380                          * See whether Enrollee is willing to use PIN instead.
1381                          */
1382                         wps->dev_pw_id = DEV_PW_DEFAULT;
1383                 }
1384         }
1385         if (pin == NULL) {
1386                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1387                            "the Enrollee (context %p registrar %p)",
1388                            wps->wps, wps->wps->registrar);
1389                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1390                                   &wps->peer_dev);
1391                 return -1;
1392         }
1393
1394         wps->dev_password = os_malloc(pin_len);
1395         if (wps->dev_password == NULL)
1396                 return -1;
1397         os_memcpy(wps->dev_password, pin, pin_len);
1398         wps->dev_password_len = pin_len;
1399
1400         return 0;
1401 }
1402
1403
1404 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1405 {
1406         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1407         wpabuf_put_be16(msg, ATTR_UUID_R);
1408         wpabuf_put_be16(msg, WPS_UUID_LEN);
1409         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1410         return 0;
1411 }
1412
1413
1414 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1415 {
1416         u8 *hash;
1417         const u8 *addr[4];
1418         size_t len[4];
1419
1420         if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1421                 return -1;
1422         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1423         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1424                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1425
1426         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1427                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1428                            "R-Hash derivation");
1429                 return -1;
1430         }
1431
1432         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1433         wpabuf_put_be16(msg, ATTR_R_HASH1);
1434         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1435         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1436         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1437         addr[0] = wps->snonce;
1438         len[0] = WPS_SECRET_NONCE_LEN;
1439         addr[1] = wps->psk1;
1440         len[1] = WPS_PSK_LEN;
1441         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1442         len[2] = wpabuf_len(wps->dh_pubkey_e);
1443         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1444         len[3] = wpabuf_len(wps->dh_pubkey_r);
1445         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1446         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1447
1448         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1449         wpabuf_put_be16(msg, ATTR_R_HASH2);
1450         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1451         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1452         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1453         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1454         addr[1] = wps->psk2;
1455         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1456         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1457
1458         return 0;
1459 }
1460
1461
1462 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1463 {
1464         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1465         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1466         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1467         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1468         return 0;
1469 }
1470
1471
1472 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1473 {
1474         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1475         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1476         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1477         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1478                         WPS_SECRET_NONCE_LEN);
1479         return 0;
1480 }
1481
1482
1483 static int wps_build_cred_network_idx(struct wpabuf *msg,
1484                                       const struct wps_credential *cred)
1485 {
1486         wpa_printf(MSG_DEBUG, "WPS:  * Network Index (1)");
1487         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1488         wpabuf_put_be16(msg, 1);
1489         wpabuf_put_u8(msg, 1);
1490         return 0;
1491 }
1492
1493
1494 static int wps_build_cred_ssid(struct wpabuf *msg,
1495                                const struct wps_credential *cred)
1496 {
1497         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1498         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1499                           cred->ssid, cred->ssid_len);
1500         wpabuf_put_be16(msg, ATTR_SSID);
1501         wpabuf_put_be16(msg, cred->ssid_len);
1502         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1503         return 0;
1504 }
1505
1506
1507 static int wps_build_cred_auth_type(struct wpabuf *msg,
1508                                     const struct wps_credential *cred)
1509 {
1510         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1511                    cred->auth_type);
1512         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1513         wpabuf_put_be16(msg, 2);
1514         wpabuf_put_be16(msg, cred->auth_type);
1515         return 0;
1516 }
1517
1518
1519 static int wps_build_cred_encr_type(struct wpabuf *msg,
1520                                     const struct wps_credential *cred)
1521 {
1522         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1523                    cred->encr_type);
1524         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1525         wpabuf_put_be16(msg, 2);
1526         wpabuf_put_be16(msg, cred->encr_type);
1527         return 0;
1528 }
1529
1530
1531 static int wps_build_cred_network_key(struct wpabuf *msg,
1532                                       const struct wps_credential *cred)
1533 {
1534         wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1535                    (int) cred->key_len);
1536         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1537                         cred->key, cred->key_len);
1538         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1539         wpabuf_put_be16(msg, cred->key_len);
1540         wpabuf_put_data(msg, cred->key, cred->key_len);
1541         return 0;
1542 }
1543
1544
1545 static int wps_build_credential(struct wpabuf *msg,
1546                                 const struct wps_credential *cred)
1547 {
1548         if (wps_build_cred_network_idx(msg, cred) ||
1549             wps_build_cred_ssid(msg, cred) ||
1550             wps_build_cred_auth_type(msg, cred) ||
1551             wps_build_cred_encr_type(msg, cred) ||
1552             wps_build_cred_network_key(msg, cred) ||
1553             wps_build_mac_addr(msg, cred->mac_addr))
1554                 return -1;
1555         return 0;
1556 }
1557
1558
1559 int wps_build_credential_wrap(struct wpabuf *msg,
1560                               const struct wps_credential *cred)
1561 {
1562         struct wpabuf *wbuf;
1563         wbuf = wpabuf_alloc(200);
1564         if (wbuf == NULL)
1565                 return -1;
1566         if (wps_build_credential(wbuf, cred)) {
1567                 wpabuf_free(wbuf);
1568                 return -1;
1569         }
1570         wpabuf_put_be16(msg, ATTR_CRED);
1571         wpabuf_put_be16(msg, wpabuf_len(wbuf));
1572         wpabuf_put_buf(msg, wbuf);
1573         wpabuf_free(wbuf);
1574         return 0;
1575 }
1576
1577
1578 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1579 {
1580         struct wpabuf *cred;
1581
1582         if (wps->wps->registrar->skip_cred_build)
1583                 goto skip_cred_build;
1584
1585         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1586         if (wps->use_cred) {
1587                 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1588                 goto use_provided;
1589         }
1590         os_memset(&wps->cred, 0, sizeof(wps->cred));
1591
1592         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1593         wps->cred.ssid_len = wps->wps->ssid_len;
1594
1595         /* Select the best authentication and encryption type */
1596         if (wps->auth_type & WPS_AUTH_WPA2PSK)
1597                 wps->auth_type = WPS_AUTH_WPA2PSK;
1598         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1599                 wps->auth_type = WPS_AUTH_WPAPSK;
1600         else if (wps->auth_type & WPS_AUTH_OPEN)
1601                 wps->auth_type = WPS_AUTH_OPEN;
1602         else if (wps->auth_type & WPS_AUTH_SHARED)
1603                 wps->auth_type = WPS_AUTH_SHARED;
1604         else {
1605                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1606                            wps->auth_type);
1607                 return -1;
1608         }
1609         wps->cred.auth_type = wps->auth_type;
1610
1611         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1612             wps->auth_type == WPS_AUTH_WPAPSK) {
1613                 if (wps->encr_type & WPS_ENCR_AES)
1614                         wps->encr_type = WPS_ENCR_AES;
1615                 else if (wps->encr_type & WPS_ENCR_TKIP)
1616                         wps->encr_type = WPS_ENCR_TKIP;
1617                 else {
1618                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1619                                    "type for WPA/WPA2");
1620                         return -1;
1621                 }
1622         } else {
1623                 if (wps->encr_type & WPS_ENCR_WEP)
1624                         wps->encr_type = WPS_ENCR_WEP;
1625                 else if (wps->encr_type & WPS_ENCR_NONE)
1626                         wps->encr_type = WPS_ENCR_NONE;
1627                 else {
1628                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1629                                    "type for non-WPA/WPA2 mode");
1630                         return -1;
1631                 }
1632         }
1633         wps->cred.encr_type = wps->encr_type;
1634         /*
1635          * Set MAC address in the Credential to be the Enrollee's MAC address
1636          */
1637         os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1638
1639         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1640             !wps->wps->registrar->disable_auto_conf) {
1641                 u8 r[16];
1642                 /* Generate a random passphrase */
1643                 if (random_get_bytes(r, sizeof(r)) < 0)
1644                         return -1;
1645                 os_free(wps->new_psk);
1646                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1647                 if (wps->new_psk == NULL)
1648                         return -1;
1649                 wps->new_psk_len--; /* remove newline */
1650                 while (wps->new_psk_len &&
1651                        wps->new_psk[wps->new_psk_len - 1] == '=')
1652                         wps->new_psk_len--;
1653                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1654                                       wps->new_psk, wps->new_psk_len);
1655                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1656                 wps->cred.key_len = wps->new_psk_len;
1657         } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1658                    wps->use_psk_key && wps->wps->psk_set) {
1659                 char hex[65];
1660                 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1661                 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1662                 os_memcpy(wps->cred.key, hex, 32 * 2);
1663                 wps->cred.key_len = 32 * 2;
1664         } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1665                    wps->wps->network_key) {
1666                 os_memcpy(wps->cred.key, wps->wps->network_key,
1667                           wps->wps->network_key_len);
1668                 wps->cred.key_len = wps->wps->network_key_len;
1669         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1670                 char hex[65];
1671                 /* Generate a random per-device PSK */
1672                 os_free(wps->new_psk);
1673                 wps->new_psk_len = 32;
1674                 wps->new_psk = os_malloc(wps->new_psk_len);
1675                 if (wps->new_psk == NULL)
1676                         return -1;
1677                 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1678                         os_free(wps->new_psk);
1679                         wps->new_psk = NULL;
1680                         return -1;
1681                 }
1682                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1683                                 wps->new_psk, wps->new_psk_len);
1684                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1685                                  wps->new_psk_len);
1686                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1687                 wps->cred.key_len = wps->new_psk_len * 2;
1688         }
1689
1690 use_provided:
1691 #ifdef CONFIG_WPS_TESTING
1692         if (wps_testing_dummy_cred)
1693                 cred = wpabuf_alloc(200);
1694         else
1695                 cred = NULL;
1696         if (cred) {
1697                 struct wps_credential dummy;
1698                 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1699                 os_memset(&dummy, 0, sizeof(dummy));
1700                 os_memcpy(dummy.ssid, "dummy", 5);
1701                 dummy.ssid_len = 5;
1702                 dummy.auth_type = WPS_AUTH_WPA2PSK;
1703                 dummy.encr_type = WPS_ENCR_AES;
1704                 os_memcpy(dummy.key, "dummy psk", 9);
1705                 dummy.key_len = 9;
1706                 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1707                 wps_build_credential(cred, &dummy);
1708                 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1709
1710                 wpabuf_put_be16(msg, ATTR_CRED);
1711                 wpabuf_put_be16(msg, wpabuf_len(cred));
1712                 wpabuf_put_buf(msg, cred);
1713
1714                 wpabuf_free(cred);
1715         }
1716 #endif /* CONFIG_WPS_TESTING */
1717
1718         cred = wpabuf_alloc(200);
1719         if (cred == NULL)
1720                 return -1;
1721
1722         if (wps_build_credential(cred, &wps->cred)) {
1723                 wpabuf_free(cred);
1724                 return -1;
1725         }
1726
1727         wpabuf_put_be16(msg, ATTR_CRED);
1728         wpabuf_put_be16(msg, wpabuf_len(cred));
1729         wpabuf_put_buf(msg, cred);
1730         wpabuf_free(cred);
1731
1732 skip_cred_build:
1733         if (wps->wps->registrar->extra_cred) {
1734                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1735                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1736         }
1737
1738         return 0;
1739 }
1740
1741
1742 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1743 {
1744         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1745
1746         if (wps_build_credential(msg, &wps->cred))
1747                 return -1;
1748
1749         return 0;
1750 }
1751
1752
1753 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1754 {
1755         struct wpabuf *msg, *plain;
1756
1757         msg = wpabuf_alloc(1000);
1758         if (msg == NULL)
1759                 return NULL;
1760
1761         plain = wpabuf_alloc(200);
1762         if (plain == NULL) {
1763                 wpabuf_free(msg);
1764                 return NULL;
1765         }
1766
1767         if (wps_build_ap_settings(wps, plain)) {
1768                 wpabuf_free(plain);
1769                 wpabuf_free(msg);
1770                 return NULL;
1771         }
1772
1773         wpabuf_put_be16(msg, ATTR_CRED);
1774         wpabuf_put_be16(msg, wpabuf_len(plain));
1775         wpabuf_put_buf(msg, plain);
1776         wpabuf_free(plain);
1777
1778         return msg;
1779 }
1780
1781
1782 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1783 {
1784         struct wpabuf *msg;
1785         int config_in_m2 = 0;
1786
1787         if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1788                 return NULL;
1789         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1790                     wps->nonce_r, WPS_NONCE_LEN);
1791         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1792
1793         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1794         msg = wpabuf_alloc(1000);
1795         if (msg == NULL)
1796                 return NULL;
1797
1798         if (wps_build_version(msg) ||
1799             wps_build_msg_type(msg, WPS_M2) ||
1800             wps_build_enrollee_nonce(wps, msg) ||
1801             wps_build_registrar_nonce(wps, msg) ||
1802             wps_build_uuid_r(wps, msg) ||
1803             wps_build_public_key(wps, msg) ||
1804             wps_derive_keys(wps) ||
1805             wps_build_auth_type_flags(wps, msg) ||
1806             wps_build_encr_type_flags(wps, msg) ||
1807             wps_build_conn_type_flags(wps, msg) ||
1808             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1809             wps_build_device_attrs(&wps->wps->dev, msg) ||
1810             wps_build_rf_bands(&wps->wps->dev, msg,
1811                                wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1812             wps_build_assoc_state(wps, msg) ||
1813             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1814             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1815             wps_build_os_version(&wps->wps->dev, msg) ||
1816             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1817                 wpabuf_free(msg);
1818                 return NULL;
1819         }
1820
1821 #ifdef CONFIG_WPS_NFC
1822         if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1823             wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1824                 /*
1825                  * Use abbreviated handshake since public key hash allowed
1826                  * Enrollee to validate our public key similarly to how Enrollee
1827                  * public key was validated. There is no need to validate Device
1828                  * Password in this case.
1829                  */
1830                 struct wpabuf *plain = wpabuf_alloc(500);
1831                 if (plain == NULL ||
1832                     wps_build_cred(wps, plain) ||
1833                     wps_build_key_wrap_auth(wps, plain) ||
1834                     wps_build_encr_settings(wps, msg, plain)) {
1835                         wpabuf_free(msg);
1836                         wpabuf_free(plain);
1837                         return NULL;
1838                 }
1839                 wpabuf_free(plain);
1840                 config_in_m2 = 1;
1841         }
1842 #endif /* CONFIG_WPS_NFC */
1843
1844         if (wps_build_authenticator(wps, msg)) {
1845                 wpabuf_free(msg);
1846                 return NULL;
1847         }
1848
1849         wps->int_reg = 1;
1850         wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1851         return msg;
1852 }
1853
1854
1855 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1856 {
1857         struct wpabuf *msg;
1858         u16 err = wps->config_error;
1859
1860         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1861         msg = wpabuf_alloc(1000);
1862         if (msg == NULL)
1863                 return NULL;
1864
1865         if (wps->wps->ap && wps->wps->ap_setup_locked &&
1866             err == WPS_CFG_NO_ERROR)
1867                 err = WPS_CFG_SETUP_LOCKED;
1868
1869         if (wps_build_version(msg) ||
1870             wps_build_msg_type(msg, WPS_M2D) ||
1871             wps_build_enrollee_nonce(wps, msg) ||
1872             wps_build_registrar_nonce(wps, msg) ||
1873             wps_build_uuid_r(wps, msg) ||
1874             wps_build_auth_type_flags(wps, msg) ||
1875             wps_build_encr_type_flags(wps, msg) ||
1876             wps_build_conn_type_flags(wps, msg) ||
1877             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1878             wps_build_device_attrs(&wps->wps->dev, msg) ||
1879             wps_build_rf_bands(&wps->wps->dev, msg,
1880                                wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1881             wps_build_assoc_state(wps, msg) ||
1882             wps_build_config_error(msg, err) ||
1883             wps_build_os_version(&wps->wps->dev, msg) ||
1884             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1885                 wpabuf_free(msg);
1886                 return NULL;
1887         }
1888
1889         wps->state = RECV_M2D_ACK;
1890         return msg;
1891 }
1892
1893
1894 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1895 {
1896         struct wpabuf *msg, *plain;
1897
1898         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1899
1900         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1901
1902         plain = wpabuf_alloc(200);
1903         if (plain == NULL)
1904                 return NULL;
1905
1906         msg = wpabuf_alloc(1000);
1907         if (msg == NULL) {
1908                 wpabuf_free(plain);
1909                 return NULL;
1910         }
1911
1912         if (wps_build_version(msg) ||
1913             wps_build_msg_type(msg, WPS_M4) ||
1914             wps_build_enrollee_nonce(wps, msg) ||
1915             wps_build_r_hash(wps, msg) ||
1916             wps_build_r_snonce1(wps, plain) ||
1917             wps_build_key_wrap_auth(wps, plain) ||
1918             wps_build_encr_settings(wps, msg, plain) ||
1919             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1920             wps_build_authenticator(wps, msg)) {
1921                 wpabuf_free(plain);
1922                 wpabuf_free(msg);
1923                 return NULL;
1924         }
1925         wpabuf_free(plain);
1926
1927         wps->state = RECV_M5;
1928         return msg;
1929 }
1930
1931
1932 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1933 {
1934         struct wpabuf *msg, *plain;
1935
1936         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1937
1938         plain = wpabuf_alloc(200);
1939         if (plain == NULL)
1940                 return NULL;
1941
1942         msg = wpabuf_alloc(1000);
1943         if (msg == NULL) {
1944                 wpabuf_free(plain);
1945                 return NULL;
1946         }
1947
1948         if (wps_build_version(msg) ||
1949             wps_build_msg_type(msg, WPS_M6) ||
1950             wps_build_enrollee_nonce(wps, msg) ||
1951             wps_build_r_snonce2(wps, plain) ||
1952             wps_build_key_wrap_auth(wps, plain) ||
1953             wps_build_encr_settings(wps, msg, plain) ||
1954             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1955             wps_build_authenticator(wps, msg)) {
1956                 wpabuf_free(plain);
1957                 wpabuf_free(msg);
1958                 return NULL;
1959         }
1960         wpabuf_free(plain);
1961
1962         wps->wps_pin_revealed = 1;
1963         wps->state = RECV_M7;
1964         return msg;
1965 }
1966
1967
1968 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1969 {
1970         struct wpabuf *msg, *plain;
1971
1972         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1973
1974         plain = wpabuf_alloc(500);
1975         if (plain == NULL)
1976                 return NULL;
1977
1978         msg = wpabuf_alloc(1000);
1979         if (msg == NULL) {
1980                 wpabuf_free(plain);
1981                 return NULL;
1982         }
1983
1984         if (wps_build_version(msg) ||
1985             wps_build_msg_type(msg, WPS_M8) ||
1986             wps_build_enrollee_nonce(wps, msg) ||
1987             ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1988             (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1989             wps_build_key_wrap_auth(wps, plain) ||
1990             wps_build_encr_settings(wps, msg, plain) ||
1991             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1992             wps_build_authenticator(wps, msg)) {
1993                 wpabuf_free(plain);
1994                 wpabuf_free(msg);
1995                 return NULL;
1996         }
1997         wpabuf_free(plain);
1998
1999         wps->state = RECV_DONE;
2000         return msg;
2001 }
2002
2003
2004 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2005                                       enum wsc_op_code *op_code)
2006 {
2007         struct wpabuf *msg;
2008
2009 #ifdef CONFIG_WPS_UPNP
2010         if (!wps->int_reg && wps->wps->wps_upnp) {
2011                 struct upnp_pending_message *p, *prev = NULL;
2012                 if (wps->ext_reg > 1)
2013                         wps_registrar_free_pending_m2(wps->wps);
2014                 p = wps->wps->upnp_msgs;
2015                 /* TODO: check pending message MAC address */
2016                 while (p && p->next) {
2017                         prev = p;
2018                         p = p->next;
2019                 }
2020                 if (p) {
2021                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2022                                    "UPnP");
2023                         if (prev)
2024                                 prev->next = NULL;
2025                         else
2026                                 wps->wps->upnp_msgs = NULL;
2027                         msg = p->msg;
2028                         switch (p->type) {
2029                         case WPS_WSC_ACK:
2030                                 *op_code = WSC_ACK;
2031                                 break;
2032                         case WPS_WSC_NACK:
2033                                 *op_code = WSC_NACK;
2034                                 break;
2035                         default:
2036                                 *op_code = WSC_MSG;
2037                                 break;
2038                         }
2039                         os_free(p);
2040                         if (wps->ext_reg == 0)
2041                                 wps->ext_reg = 1;
2042                         return msg;
2043                 }
2044         }
2045         if (wps->ext_reg) {
2046                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2047                            "pending message available");
2048                 return NULL;
2049         }
2050 #endif /* CONFIG_WPS_UPNP */
2051
2052         switch (wps->state) {
2053         case SEND_M2:
2054                 if (wps_get_dev_password(wps) < 0)
2055                         msg = wps_build_m2d(wps);
2056                 else
2057                         msg = wps_build_m2(wps);
2058                 *op_code = WSC_MSG;
2059                 break;
2060         case SEND_M2D:
2061                 msg = wps_build_m2d(wps);
2062                 *op_code = WSC_MSG;
2063                 break;
2064         case SEND_M4:
2065                 msg = wps_build_m4(wps);
2066                 *op_code = WSC_MSG;
2067                 break;
2068         case SEND_M6:
2069                 msg = wps_build_m6(wps);
2070                 *op_code = WSC_MSG;
2071                 break;
2072         case SEND_M8:
2073                 msg = wps_build_m8(wps);
2074                 *op_code = WSC_MSG;
2075                 break;
2076         case RECV_DONE:
2077                 msg = wps_build_wsc_ack(wps);
2078                 *op_code = WSC_ACK;
2079                 break;
2080         case SEND_WSC_NACK:
2081                 msg = wps_build_wsc_nack(wps);
2082                 *op_code = WSC_NACK;
2083                 break;
2084         default:
2085                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2086                            "a message", wps->state);
2087                 msg = NULL;
2088                 break;
2089         }
2090
2091         if (*op_code == WSC_MSG && msg) {
2092                 /* Save a copy of the last message for Authenticator derivation
2093                  */
2094                 wpabuf_free(wps->last_msg);
2095                 wps->last_msg = wpabuf_dup(msg);
2096         }
2097
2098         return msg;
2099 }
2100
2101
2102 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2103 {
2104         if (e_nonce == NULL) {
2105                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2106                 return -1;
2107         }
2108
2109         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2110         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2111                     wps->nonce_e, WPS_NONCE_LEN);
2112
2113         return 0;
2114 }
2115
2116
2117 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2118 {
2119         if (r_nonce == NULL) {
2120                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2121                 return -1;
2122         }
2123
2124         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2125                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2126                 return -1;
2127         }
2128
2129         return 0;
2130 }
2131
2132
2133 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2134 {
2135         if (uuid_e == NULL) {
2136                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2137                 return -1;
2138         }
2139
2140         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2141         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2142
2143         return 0;
2144 }
2145
2146
2147 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2148 {
2149         if (pw_id == NULL) {
2150                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2151                 return -1;
2152         }
2153
2154         wps->dev_pw_id = WPA_GET_BE16(pw_id);
2155         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2156
2157         return 0;
2158 }
2159
2160
2161 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2162 {
2163         if (e_hash1 == NULL) {
2164                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2165                 return -1;
2166         }
2167
2168         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2169         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2170
2171         return 0;
2172 }
2173
2174
2175 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2176 {
2177         if (e_hash2 == NULL) {
2178                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2179                 return -1;
2180         }
2181
2182         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2183         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2184
2185         return 0;
2186 }
2187
2188
2189 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2190 {
2191         u8 hash[SHA256_MAC_LEN];
2192         const u8 *addr[4];
2193         size_t len[4];
2194
2195         if (e_snonce1 == NULL) {
2196                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2197                 return -1;
2198         }
2199
2200         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2201                         WPS_SECRET_NONCE_LEN);
2202
2203         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2204         addr[0] = e_snonce1;
2205         len[0] = WPS_SECRET_NONCE_LEN;
2206         addr[1] = wps->psk1;
2207         len[1] = WPS_PSK_LEN;
2208         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2209         len[2] = wpabuf_len(wps->dh_pubkey_e);
2210         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2211         len[3] = wpabuf_len(wps->dh_pubkey_r);
2212         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2213
2214         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2215                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2216                            "not match with the pre-committed value");
2217                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2218                 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2219                 return -1;
2220         }
2221
2222         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2223                    "half of the device password");
2224
2225         return 0;
2226 }
2227
2228
2229 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2230 {
2231         u8 hash[SHA256_MAC_LEN];
2232         const u8 *addr[4];
2233         size_t len[4];
2234
2235         if (e_snonce2 == NULL) {
2236                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2237                 return -1;
2238         }
2239
2240         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2241                         WPS_SECRET_NONCE_LEN);
2242
2243         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2244         addr[0] = e_snonce2;
2245         len[0] = WPS_SECRET_NONCE_LEN;
2246         addr[1] = wps->psk2;
2247         len[1] = WPS_PSK_LEN;
2248         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2249         len[2] = wpabuf_len(wps->dh_pubkey_e);
2250         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2251         len[3] = wpabuf_len(wps->dh_pubkey_r);
2252         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2253
2254         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2255                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2256                            "not match with the pre-committed value");
2257                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2258                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2259                 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2260                 return -1;
2261         }
2262
2263         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2264                    "half of the device password");
2265         wps->wps_pin_revealed = 0;
2266         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2267
2268         /*
2269          * In case wildcard PIN is used and WPS handshake succeeds in the first
2270          * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2271          * sure the PIN gets invalidated here.
2272          */
2273         wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2274
2275         return 0;
2276 }
2277
2278
2279 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2280 {
2281         if (mac_addr == NULL) {
2282                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2283                 return -1;
2284         }
2285
2286         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2287                    MAC2STR(mac_addr));
2288         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2289         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2290
2291         return 0;
2292 }
2293
2294
2295 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2296                               size_t pk_len)
2297 {
2298         if (pk == NULL || pk_len == 0) {
2299                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2300                 return -1;
2301         }
2302
2303         wpabuf_free(wps->dh_pubkey_e);
2304         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2305         if (wps->dh_pubkey_e == NULL)
2306                 return -1;
2307
2308         return 0;
2309 }
2310
2311
2312 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2313 {
2314         u16 auth_types;
2315
2316         if (auth == NULL) {
2317                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2318                            "received");
2319                 return -1;
2320         }
2321
2322         auth_types = WPA_GET_BE16(auth);
2323
2324         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2325                    auth_types);
2326         wps->auth_type = wps->wps->auth_types & auth_types;
2327         if (wps->auth_type == 0) {
2328                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2329                            "authentication types (own 0x%x Enrollee 0x%x)",
2330                            wps->wps->auth_types, auth_types);
2331 #ifdef WPS_WORKAROUNDS
2332                 /*
2333                  * Some deployed implementations seem to advertise incorrect
2334                  * information in this attribute. For example, Linksys WRT350N
2335                  * seems to have a byteorder bug that breaks this negotiation.
2336                  * In order to interoperate with existing implementations,
2337                  * assume that the Enrollee supports everything we do.
2338                  */
2339                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2340                            "does not advertise supported authentication types "
2341                            "correctly");
2342                 wps->auth_type = wps->wps->auth_types;
2343 #else /* WPS_WORKAROUNDS */
2344                 return -1;
2345 #endif /* WPS_WORKAROUNDS */
2346         }
2347
2348         return 0;
2349 }
2350
2351
2352 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2353 {
2354         u16 encr_types;
2355
2356         if (encr == NULL) {
2357                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2358                            "received");
2359                 return -1;
2360         }
2361
2362         encr_types = WPA_GET_BE16(encr);
2363
2364         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2365                    encr_types);
2366         wps->encr_type = wps->wps->encr_types & encr_types;
2367         if (wps->encr_type == 0) {
2368                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2369                            "encryption types (own 0x%x Enrollee 0x%x)",
2370                            wps->wps->encr_types, encr_types);
2371 #ifdef WPS_WORKAROUNDS
2372                 /*
2373                  * Some deployed implementations seem to advertise incorrect
2374                  * information in this attribute. For example, Linksys WRT350N
2375                  * seems to have a byteorder bug that breaks this negotiation.
2376                  * In order to interoperate with existing implementations,
2377                  * assume that the Enrollee supports everything we do.
2378                  */
2379                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2380                            "does not advertise supported encryption types "
2381                            "correctly");
2382                 wps->encr_type = wps->wps->encr_types;
2383 #else /* WPS_WORKAROUNDS */
2384                 return -1;
2385 #endif /* WPS_WORKAROUNDS */
2386         }
2387
2388         return 0;
2389 }
2390
2391
2392 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2393 {
2394         if (conn == NULL) {
2395                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2396                            "received");
2397                 return -1;
2398         }
2399
2400         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2401                    *conn);
2402
2403         return 0;
2404 }
2405
2406
2407 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2408 {
2409         u16 m;
2410
2411         if (methods == NULL) {
2412                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2413                 return -1;
2414         }
2415
2416         m = WPA_GET_BE16(methods);
2417
2418         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2419                    "%s%s%s%s%s%s%s%s%s", m,
2420                    m & WPS_CONFIG_USBA ? " [USBA]" : "",
2421                    m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2422                    m & WPS_CONFIG_LABEL ? " [Label]" : "",
2423                    m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2424                    m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2425                    m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2426                    m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2427                    m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2428                    m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2429
2430         if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2431                 /*
2432                  * The Enrollee does not have a display so it is unlikely to be
2433                  * able to show the passphrase to a user and as such, could
2434                  * benefit from receiving PSK to reduce key derivation time.
2435                  */
2436                 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2437                            "Enrollee not supporting display");
2438                 wps->use_psk_key = 1;
2439         }
2440
2441         return 0;
2442 }
2443
2444
2445 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2446 {
2447         if (state == NULL) {
2448                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2449                            "received");
2450                 return -1;
2451         }
2452
2453         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2454                    *state);
2455
2456         return 0;
2457 }
2458
2459
2460 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2461 {
2462         u16 a;
2463
2464         if (assoc == NULL) {
2465                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2466                 return -1;
2467         }
2468
2469         a = WPA_GET_BE16(assoc);
2470         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2471
2472         return 0;
2473 }
2474
2475
2476 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2477 {
2478         u16 e;
2479
2480         if (err == NULL) {
2481                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2482                 return -1;
2483         }
2484
2485         e = WPA_GET_BE16(err);
2486         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2487
2488         return 0;
2489 }
2490
2491
2492 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2493 {
2494 #ifdef CONFIG_P2P
2495         struct wps_registrar *reg = wps->wps->registrar;
2496
2497         if (is_zero_ether_addr(reg->p2p_dev_addr))
2498                 return 1; /* no filtering in use */
2499
2500         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2501                 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2502                            "filtering for PBC: expected " MACSTR " was "
2503                            MACSTR " - indicate PBC session overlap",
2504                            MAC2STR(reg->p2p_dev_addr),
2505                            MAC2STR(wps->p2p_dev_addr));
2506                 return 0;
2507         }
2508 #endif /* CONFIG_P2P */
2509         return 1;
2510 }
2511
2512
2513 static int wps_registrar_skip_overlap(struct wps_data *wps)
2514 {
2515 #ifdef CONFIG_P2P
2516         struct wps_registrar *reg = wps->wps->registrar;
2517
2518         if (is_zero_ether_addr(reg->p2p_dev_addr))
2519                 return 0; /* no specific Enrollee selected */
2520
2521         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2522                 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2523                            "Enrollee match");
2524                 return 1;
2525         }
2526 #endif /* CONFIG_P2P */
2527         return 0;
2528 }
2529
2530
2531 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2532                                            struct wps_parse_attr *attr)
2533 {
2534         wpa_printf(MSG_DEBUG, "WPS: Received M1");
2535
2536         if (wps->state != RECV_M1) {
2537                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2538                            "receiving M1", wps->state);
2539                 return WPS_FAILURE;
2540         }
2541
2542         if (wps_process_uuid_e(wps, attr->uuid_e) ||
2543             wps_process_mac_addr(wps, attr->mac_addr) ||
2544             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2545             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2546             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2547             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2548             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2549             wps_process_config_methods(wps, attr->config_methods) ||
2550             wps_process_wps_state(wps, attr->wps_state) ||
2551             wps_process_device_attrs(&wps->peer_dev, attr) ||
2552             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2553             wps_process_assoc_state(wps, attr->assoc_state) ||
2554             wps_process_dev_password_id(wps, attr->dev_password_id) ||
2555             wps_process_config_error(wps, attr->config_error) ||
2556             wps_process_os_version(&wps->peer_dev, attr->os_version))
2557                 return WPS_FAILURE;
2558
2559         if (wps->dev_pw_id < 0x10 &&
2560             wps->dev_pw_id != DEV_PW_DEFAULT &&
2561             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2562             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2563             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2564 #ifdef CONFIG_WPS_NFC
2565             wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2566 #endif /* CONFIG_WPS_NFC */
2567             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2568              !wps->wps->registrar->pbc)) {
2569                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2570                            wps->dev_pw_id);
2571                 wps->state = SEND_M2D;
2572                 return WPS_CONTINUE;
2573         }
2574
2575 #ifdef CONFIG_WPS_NFC
2576         if (wps->dev_pw_id >= 0x10 ||
2577             wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2578                 struct wps_nfc_pw_token *token;
2579                 const u8 *addr[1];
2580                 u8 hash[WPS_HASH_LEN];
2581
2582                 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2583                            wps->dev_pw_id, wps->wps, wps->wps->registrar);
2584                 token = wps_get_nfc_pw_token(
2585                         &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2586                 if (token && token->peer_pk_hash_known) {
2587                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2588                                    "Password Token");
2589                         dl_list_del(&token->list);
2590                         wps->nfc_pw_token = token;
2591
2592                         addr[0] = attr->public_key;
2593                         sha256_vector(1, addr, &attr->public_key_len, hash);
2594                         if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash,
2595                                       WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2596                                 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2597                                            "mismatch");
2598                                 wps->state = SEND_M2D;
2599                                 wps->config_error =
2600                                         WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2601                                 return WPS_CONTINUE;
2602                         }
2603                 } else if (token) {
2604                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2605                                    "Password Token (no peer PK hash)");
2606                         wps->nfc_pw_token = token;
2607                 } else if (wps->dev_pw_id >= 0x10 &&
2608                            wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2609                            wps->wps->ap_nfc_dev_pw) {
2610                         wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2611                 }
2612         }
2613 #endif /* CONFIG_WPS_NFC */
2614
2615         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2616                 if ((wps->wps->registrar->force_pbc_overlap ||
2617                      wps_registrar_pbc_overlap(wps->wps->registrar,
2618                                                wps->mac_addr_e, wps->uuid_e) ||
2619                      !wps_registrar_p2p_dev_addr_match(wps)) &&
2620                     !wps_registrar_skip_overlap(wps)) {
2621                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2622                                    "negotiation");
2623                         wps->state = SEND_M2D;
2624                         wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2625                         wps_pbc_overlap_event(wps->wps);
2626                         wps_fail_event(wps->wps, WPS_M1,
2627                                        WPS_CFG_MULTIPLE_PBC_DETECTED,
2628                                        WPS_EI_NO_ERROR, wps->mac_addr_e);
2629                         wps->wps->registrar->force_pbc_overlap = 1;
2630                         return WPS_CONTINUE;
2631                 }
2632                 wps_registrar_add_pbc_session(wps->wps->registrar,
2633                                               wps->mac_addr_e, wps->uuid_e);
2634                 wps->pbc = 1;
2635         }
2636
2637 #ifdef WPS_WORKAROUNDS
2638         /*
2639          * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2640          * passphrase format. To avoid interop issues, force PSK format to be
2641          * used.
2642          */
2643         if (!wps->use_psk_key &&
2644             wps->peer_dev.manufacturer &&
2645             os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2646             wps->peer_dev.model_name &&
2647             os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2648                 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2649                            "PSK format");
2650                 wps->use_psk_key = 1;
2651         }
2652 #endif /* WPS_WORKAROUNDS */
2653
2654         wps->state = SEND_M2;
2655         return WPS_CONTINUE;
2656 }
2657
2658
2659 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2660                                            const struct wpabuf *msg,
2661                                            struct wps_parse_attr *attr)
2662 {
2663         wpa_printf(MSG_DEBUG, "WPS: Received M3");
2664
2665         if (wps->state != RECV_M3) {
2666                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2667                            "receiving M3", wps->state);
2668                 wps->state = SEND_WSC_NACK;
2669                 return WPS_CONTINUE;
2670         }
2671
2672         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2673             !wps_registrar_skip_overlap(wps)) {
2674                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2675                            "session overlap");
2676                 wps->state = SEND_WSC_NACK;
2677                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2678                 return WPS_CONTINUE;
2679         }
2680
2681         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2682             wps_process_authenticator(wps, attr->authenticator, msg) ||
2683             wps_process_e_hash1(wps, attr->e_hash1) ||
2684             wps_process_e_hash2(wps, attr->e_hash2)) {
2685                 wps->state = SEND_WSC_NACK;
2686                 return WPS_CONTINUE;
2687         }
2688
2689         wps->state = SEND_M4;
2690         return WPS_CONTINUE;
2691 }
2692
2693
2694 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2695                                            const struct wpabuf *msg,
2696                                            struct wps_parse_attr *attr)
2697 {
2698         struct wpabuf *decrypted;
2699         struct wps_parse_attr eattr;
2700
2701         wpa_printf(MSG_DEBUG, "WPS: Received M5");
2702
2703         if (wps->state != RECV_M5) {
2704                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2705                            "receiving M5", wps->state);
2706                 wps->state = SEND_WSC_NACK;
2707                 return WPS_CONTINUE;
2708         }
2709
2710         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2711             !wps_registrar_skip_overlap(wps)) {
2712                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2713                            "session overlap");
2714                 wps->state = SEND_WSC_NACK;
2715                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2716                 return WPS_CONTINUE;
2717         }
2718
2719         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2720             wps_process_authenticator(wps, attr->authenticator, msg)) {
2721                 wps->state = SEND_WSC_NACK;
2722                 return WPS_CONTINUE;
2723         }
2724
2725         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2726                                               attr->encr_settings_len);
2727         if (decrypted == NULL) {
2728                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2729                            "Settings attribute");
2730                 wps->state = SEND_WSC_NACK;
2731                 return WPS_CONTINUE;
2732         }
2733
2734         if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2735                 wpabuf_free(decrypted);
2736                 wps->state = SEND_WSC_NACK;
2737                 return WPS_CONTINUE;
2738         }
2739
2740         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2741                    "attribute");
2742         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2743             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2744             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2745                 wpabuf_free(decrypted);
2746                 wps->state = SEND_WSC_NACK;
2747                 return WPS_CONTINUE;
2748         }
2749         wpabuf_free(decrypted);
2750
2751         wps->state = SEND_M6;
2752         return WPS_CONTINUE;
2753 }
2754
2755
2756 static void wps_sta_cred_cb(struct wps_data *wps)
2757 {
2758         /*
2759          * Update credential to only include a single authentication and
2760          * encryption type in case the AP configuration includes more than one
2761          * option.
2762          */
2763         if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2764                 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2765         else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2766                 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2767         if (wps->cred.encr_type & WPS_ENCR_AES)
2768                 wps->cred.encr_type = WPS_ENCR_AES;
2769         else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2770                 wps->cred.encr_type = WPS_ENCR_TKIP;
2771         wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2772                    "AP configuration");
2773         if (wps->wps->cred_cb)
2774                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2775 }
2776
2777
2778 static void wps_cred_update(struct wps_credential *dst,
2779                             struct wps_credential *src)
2780 {
2781         os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2782         dst->ssid_len = src->ssid_len;
2783         dst->auth_type = src->auth_type;
2784         dst->encr_type = src->encr_type;
2785         dst->key_idx = src->key_idx;
2786         os_memcpy(dst->key, src->key, sizeof(dst->key));
2787         dst->key_len = src->key_len;
2788 }
2789
2790
2791 static int wps_process_ap_settings_r(struct wps_data *wps,
2792                                      struct wps_parse_attr *attr)
2793 {
2794         struct wpabuf *msg;
2795
2796         if (wps->wps->ap || wps->er)
2797                 return 0;
2798
2799         /* AP Settings Attributes in M7 when Enrollee is an AP */
2800         if (wps_process_ap_settings(attr, &wps->cred) < 0)
2801                 return -1;
2802
2803         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2804
2805         if (wps->new_ap_settings) {
2806                 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2807                            "new settings");
2808                 wps_cred_update(&wps->cred, wps->new_ap_settings);
2809                 return 0;
2810         } else {
2811                 /*
2812                  * Use the AP PIN only to receive the current AP settings, not
2813                  * to reconfigure the AP.
2814                  */
2815
2816                 /*
2817                  * Clear selected registrar here since we do not get to
2818                  * WSC_Done in this protocol run.
2819                  */
2820                 wps_registrar_pin_completed(wps->wps->registrar);
2821
2822                 msg = wps_build_ap_cred(wps);
2823                 if (msg == NULL)
2824                         return -1;
2825                 wps->cred.cred_attr = wpabuf_head(msg);
2826                 wps->cred.cred_attr_len = wpabuf_len(msg);
2827
2828                 if (wps->ap_settings_cb) {
2829                         wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2830                                             &wps->cred);
2831                         wpabuf_free(msg);
2832                         return 1;
2833                 }
2834                 wps_sta_cred_cb(wps);
2835
2836                 wps->cred.cred_attr = NULL;
2837                 wps->cred.cred_attr_len = 0;
2838                 wpabuf_free(msg);
2839
2840                 return 1;
2841         }
2842 }
2843
2844
2845 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2846                                            const struct wpabuf *msg,
2847                                            struct wps_parse_attr *attr)
2848 {
2849         struct wpabuf *decrypted;
2850         struct wps_parse_attr eattr;
2851
2852         wpa_printf(MSG_DEBUG, "WPS: Received M7");
2853
2854         if (wps->state != RECV_M7) {
2855                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2856                            "receiving M7", wps->state);
2857                 wps->state = SEND_WSC_NACK;
2858                 return WPS_CONTINUE;
2859         }
2860
2861         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2862             !wps_registrar_skip_overlap(wps)) {
2863                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2864                            "session overlap");
2865                 wps->state = SEND_WSC_NACK;
2866                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2867                 return WPS_CONTINUE;
2868         }
2869
2870         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2871             wps_process_authenticator(wps, attr->authenticator, msg)) {
2872                 wps->state = SEND_WSC_NACK;
2873                 return WPS_CONTINUE;
2874         }
2875
2876         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2877                                               attr->encr_settings_len);
2878         if (decrypted == NULL) {
2879                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2880                            "Settings attribute");
2881                 wps->state = SEND_WSC_NACK;
2882                 return WPS_CONTINUE;
2883         }
2884
2885         if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2886                                  attr->version2 != NULL) < 0) {
2887                 wpabuf_free(decrypted);
2888                 wps->state = SEND_WSC_NACK;
2889                 return WPS_CONTINUE;
2890         }
2891
2892         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2893                    "attribute");
2894         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2895             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2896             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2897             wps_process_ap_settings_r(wps, &eattr)) {
2898                 wpabuf_free(decrypted);
2899                 wps->state = SEND_WSC_NACK;
2900                 return WPS_CONTINUE;
2901         }
2902
2903         wpabuf_free(decrypted);
2904
2905         wps->state = SEND_M8;
2906         return WPS_CONTINUE;
2907 }
2908
2909
2910 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2911                                                 const struct wpabuf *msg)
2912 {
2913         struct wps_parse_attr attr;
2914         enum wps_process_res ret = WPS_CONTINUE;
2915
2916         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2917
2918         if (wps_parse_msg(msg, &attr) < 0)
2919                 return WPS_FAILURE;
2920
2921         if (attr.msg_type == NULL) {
2922                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2923                 wps->state = SEND_WSC_NACK;
2924                 return WPS_CONTINUE;
2925         }
2926
2927         if (*attr.msg_type != WPS_M1 &&
2928             (attr.registrar_nonce == NULL ||
2929              os_memcmp(wps->nonce_r, attr.registrar_nonce,
2930                        WPS_NONCE_LEN) != 0)) {
2931                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2932                 return WPS_FAILURE;
2933         }
2934
2935         switch (*attr.msg_type) {
2936         case WPS_M1:
2937                 if (wps_validate_m1(msg) < 0)
2938                         return WPS_FAILURE;
2939 #ifdef CONFIG_WPS_UPNP
2940                 if (wps->wps->wps_upnp && attr.mac_addr) {
2941                         /* Remove old pending messages when starting new run */
2942                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2943                         wps->wps->upnp_msgs = NULL;
2944
2945                         upnp_wps_device_send_wlan_event(
2946                                 wps->wps->wps_upnp, attr.mac_addr,
2947                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2948                 }
2949 #endif /* CONFIG_WPS_UPNP */
2950                 ret = wps_process_m1(wps, &attr);
2951                 break;
2952         case WPS_M3:
2953                 if (wps_validate_m3(msg) < 0)
2954                         return WPS_FAILURE;
2955                 ret = wps_process_m3(wps, msg, &attr);
2956                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2957                         wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2958                                        wps->error_indication, wps->mac_addr_e);
2959                 break;
2960         case WPS_M5:
2961                 if (wps_validate_m5(msg) < 0)
2962                         return WPS_FAILURE;
2963                 ret = wps_process_m5(wps, msg, &attr);
2964                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2965                         wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2966                                        wps->error_indication, wps->mac_addr_e);
2967                 break;
2968         case WPS_M7:
2969                 if (wps_validate_m7(msg) < 0)
2970                         return WPS_FAILURE;
2971                 ret = wps_process_m7(wps, msg, &attr);
2972                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2973                         wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2974                                        wps->error_indication, wps->mac_addr_e);
2975                 break;
2976         default:
2977                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2978                            *attr.msg_type);
2979                 return WPS_FAILURE;
2980         }
2981
2982         if (ret == WPS_CONTINUE) {
2983                 /* Save a copy of the last message for Authenticator derivation
2984                  */
2985                 wpabuf_free(wps->last_msg);
2986                 wps->last_msg = wpabuf_dup(msg);
2987         }
2988
2989         return ret;
2990 }
2991
2992
2993 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2994                                                 const struct wpabuf *msg)
2995 {
2996         struct wps_parse_attr attr;
2997
2998         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2999
3000         if (wps_parse_msg(msg, &attr) < 0)
3001                 return WPS_FAILURE;
3002
3003         if (attr.msg_type == NULL) {
3004                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3005                 return WPS_FAILURE;
3006         }
3007
3008         if (*attr.msg_type != WPS_WSC_ACK) {
3009                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3010                            *attr.msg_type);
3011                 return WPS_FAILURE;
3012         }
3013
3014 #ifdef CONFIG_WPS_UPNP
3015         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3016             upnp_wps_subscribers(wps->wps->wps_upnp)) {
3017                 if (wps->wps->upnp_msgs)
3018                         return WPS_CONTINUE;
3019                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3020                            "external Registrar");
3021                 return WPS_PENDING;
3022         }
3023 #endif /* CONFIG_WPS_UPNP */
3024
3025         if (attr.registrar_nonce == NULL ||
3026             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3027         {
3028                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3029                 return WPS_FAILURE;
3030         }
3031
3032         if (attr.enrollee_nonce == NULL ||
3033             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3034                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3035                 return WPS_FAILURE;
3036         }
3037
3038         if (wps->state == RECV_M2D_ACK) {
3039 #ifdef CONFIG_WPS_UPNP
3040                 if (wps->wps->wps_upnp &&
3041                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
3042                         if (wps->wps->upnp_msgs)
3043                                 return WPS_CONTINUE;
3044                         if (wps->ext_reg == 0)
3045                                 wps->ext_reg = 1;
3046                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3047                                    "external Registrar");
3048                         return WPS_PENDING;
3049                 }
3050 #endif /* CONFIG_WPS_UPNP */
3051
3052                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3053                            "terminate negotiation");
3054         }
3055
3056         return WPS_FAILURE;
3057 }
3058
3059
3060 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3061                                                  const struct wpabuf *msg)
3062 {
3063         struct wps_parse_attr attr;
3064         int old_state;
3065         u16 config_error;
3066
3067         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3068
3069         old_state = wps->state;
3070         wps->state = SEND_WSC_NACK;
3071
3072         if (wps_parse_msg(msg, &attr) < 0)
3073                 return WPS_FAILURE;
3074
3075         if (attr.msg_type == NULL) {
3076                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3077                 return WPS_FAILURE;
3078         }
3079
3080         if (*attr.msg_type != WPS_WSC_NACK) {
3081                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3082                            *attr.msg_type);
3083                 return WPS_FAILURE;
3084         }
3085
3086 #ifdef CONFIG_WPS_UPNP
3087         if (wps->wps->wps_upnp && wps->ext_reg) {
3088                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3089                            "Registrar terminated by the Enrollee");
3090                 return WPS_FAILURE;
3091         }
3092 #endif /* CONFIG_WPS_UPNP */
3093
3094         if (attr.registrar_nonce == NULL ||
3095             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3096         {
3097                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3098                 return WPS_FAILURE;
3099         }
3100
3101         if (attr.enrollee_nonce == NULL ||
3102             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3103                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3104                 return WPS_FAILURE;
3105         }
3106
3107         if (attr.config_error == NULL) {
3108                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3109                            "in WSC_NACK");
3110                 return WPS_FAILURE;
3111         }
3112
3113         config_error = WPA_GET_BE16(attr.config_error);
3114         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3115                    "Configuration Error %d", config_error);
3116
3117         switch (old_state) {
3118         case RECV_M3:
3119                 wps_fail_event(wps->wps, WPS_M2, config_error,
3120                                wps->error_indication, wps->mac_addr_e);
3121                 break;
3122         case RECV_M5:
3123                 wps_fail_event(wps->wps, WPS_M4, config_error,
3124                                wps->error_indication, wps->mac_addr_e);
3125                 break;
3126         case RECV_M7:
3127                 wps_fail_event(wps->wps, WPS_M6, config_error,
3128                                wps->error_indication, wps->mac_addr_e);
3129                 break;
3130         case RECV_DONE:
3131                 wps_fail_event(wps->wps, WPS_M8, config_error,
3132                                wps->error_indication, wps->mac_addr_e);
3133                 break;
3134         default:
3135                 break;
3136         }
3137
3138         return WPS_FAILURE;
3139 }
3140
3141
3142 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3143                                                  const struct wpabuf *msg)
3144 {
3145         struct wps_parse_attr attr;
3146
3147         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3148
3149         if (wps->state != RECV_DONE &&
3150             (!wps->wps->wps_upnp || !wps->ext_reg)) {
3151                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3152                            "receiving WSC_Done", wps->state);
3153                 return WPS_FAILURE;
3154         }
3155
3156         if (wps_parse_msg(msg, &attr) < 0)
3157                 return WPS_FAILURE;
3158
3159         if (attr.msg_type == NULL) {
3160                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3161                 return WPS_FAILURE;
3162         }
3163
3164         if (*attr.msg_type != WPS_WSC_DONE) {
3165                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3166                            *attr.msg_type);
3167                 return WPS_FAILURE;
3168         }
3169
3170 #ifdef CONFIG_WPS_UPNP
3171         if (wps->wps->wps_upnp && wps->ext_reg) {
3172                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3173                            "Registrar completed successfully");
3174                 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3175                                  wps->uuid_e);
3176                 return WPS_DONE;
3177         }
3178 #endif /* CONFIG_WPS_UPNP */
3179
3180         if (attr.registrar_nonce == NULL ||
3181             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3182         {
3183                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3184                 return WPS_FAILURE;
3185         }
3186
3187         if (attr.enrollee_nonce == NULL ||
3188             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3189                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3190                 return WPS_FAILURE;
3191         }
3192
3193         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3194         wps_device_store(wps->wps->registrar, &wps->peer_dev,
3195                          wps->uuid_e);
3196
3197         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3198             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3199                 struct wps_credential cred;
3200
3201                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3202                            "on first Enrollee connection");
3203
3204                 os_memset(&cred, 0, sizeof(cred));
3205                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3206                 cred.ssid_len = wps->wps->ssid_len;
3207                 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3208                 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3209                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3210                 cred.key_len = wps->new_psk_len;
3211
3212                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3213                 wpa_hexdump_ascii_key(MSG_DEBUG,
3214                                       "WPS: Generated random passphrase",
3215                                       wps->new_psk, wps->new_psk_len);
3216                 if (wps->wps->cred_cb)
3217                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3218
3219                 os_free(wps->new_psk);
3220                 wps->new_psk = NULL;
3221         }
3222
3223         if (!wps->wps->ap && !wps->er)
3224                 wps_sta_cred_cb(wps);
3225
3226         if (wps->new_psk) {
3227                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3228                                    wps->p2p_dev_addr, wps->new_psk,
3229                                    wps->new_psk_len)) {
3230                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3231                                    "new PSK");
3232                 }
3233                 os_free(wps->new_psk);
3234                 wps->new_psk = NULL;
3235         }
3236
3237         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3238                            wps->dev_password, wps->dev_password_len);
3239
3240         if (wps->pbc) {
3241                 wps_registrar_remove_pbc_session(wps->wps->registrar,
3242                                                  wps->uuid_e,
3243                                                  wps->p2p_dev_addr);
3244                 wps_registrar_pbc_completed(wps->wps->registrar);
3245 #ifdef WPS_WORKAROUNDS
3246                 os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3247 #endif /* WPS_WORKAROUNDS */
3248                 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3249                           WPS_UUID_LEN);
3250         } else {
3251                 wps_registrar_pin_completed(wps->wps->registrar);
3252         }
3253         /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3254          * merge them into APs own list.. */
3255
3256         wps_success_event(wps->wps, wps->mac_addr_e);
3257
3258         return WPS_DONE;
3259 }
3260
3261
3262 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3263                                                enum wsc_op_code op_code,
3264                                                const struct wpabuf *msg)
3265 {
3266         enum wps_process_res ret;
3267
3268         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3269                    "op_code=%d)",
3270                    (unsigned long) wpabuf_len(msg), op_code);
3271
3272 #ifdef CONFIG_WPS_UPNP
3273         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3274                 struct wps_parse_attr attr;
3275                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3276                     *attr.msg_type == WPS_M3)
3277                         wps->ext_reg = 2; /* past M2/M2D phase */
3278         }
3279         if (wps->ext_reg > 1)
3280                 wps_registrar_free_pending_m2(wps->wps);
3281         if (wps->wps->wps_upnp && wps->ext_reg &&
3282             wps->wps->upnp_msgs == NULL &&
3283             (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3284         {
3285                 struct wps_parse_attr attr;
3286                 int type;
3287                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3288                         type = -1;
3289                 else
3290                         type = *attr.msg_type;
3291                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3292                            " to external Registrar for processing", type);
3293                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3294                                                 wps->mac_addr_e,
3295                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
3296                                                 msg);
3297                 if (op_code == WSC_MSG)
3298                         return WPS_PENDING;
3299         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3300                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3301                            "external Registrar");
3302                 return WPS_CONTINUE;
3303         }
3304 #endif /* CONFIG_WPS_UPNP */
3305
3306         switch (op_code) {
3307         case WSC_MSG:
3308                 return wps_process_wsc_msg(wps, msg);
3309         case WSC_ACK:
3310                 if (wps_validate_wsc_ack(msg) < 0)
3311                         return WPS_FAILURE;
3312                 return wps_process_wsc_ack(wps, msg);
3313         case WSC_NACK:
3314                 if (wps_validate_wsc_nack(msg) < 0)
3315                         return WPS_FAILURE;
3316                 return wps_process_wsc_nack(wps, msg);
3317         case WSC_Done:
3318                 if (wps_validate_wsc_done(msg) < 0)
3319                         return WPS_FAILURE;
3320                 ret = wps_process_wsc_done(wps, msg);
3321                 if (ret == WPS_FAILURE) {
3322                         wps->state = SEND_WSC_NACK;
3323                         wps_fail_event(wps->wps, WPS_WSC_DONE,
3324                                        wps->config_error,
3325                                        wps->error_indication, wps->mac_addr_e);
3326                 }
3327                 return ret;
3328         default:
3329                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3330                 return WPS_FAILURE;
3331         }
3332 }
3333
3334
3335 int wps_registrar_update_ie(struct wps_registrar *reg)
3336 {
3337         return wps_set_ie(reg);
3338 }
3339
3340
3341 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3342                                                void *timeout_ctx)
3343 {
3344         struct wps_registrar *reg = eloop_ctx;
3345
3346         wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3347                    "unselect internal Registrar");
3348         reg->selected_registrar = 0;
3349         reg->pbc = 0;
3350         wps_registrar_selected_registrar_changed(reg, 0);
3351 }
3352
3353
3354 #ifdef CONFIG_WPS_UPNP
3355 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3356                                       struct subscription *s)
3357 {
3358         int i, j;
3359         wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3360                    "config_methods=0x%x)",
3361                    s->dev_password_id, s->config_methods);
3362         reg->sel_reg_union = 1;
3363         if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3364                 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3365         if (reg->sel_reg_config_methods_override == -1)
3366                 reg->sel_reg_config_methods_override = 0;
3367         reg->sel_reg_config_methods_override |= s->config_methods;
3368         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3369                 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3370                         break;
3371         for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3372              j++) {
3373                 if (is_zero_ether_addr(s->authorized_macs[j]))
3374                         break;
3375                 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3376                            MACSTR, MAC2STR(s->authorized_macs[j]));
3377                 os_memcpy(reg->authorized_macs_union[i],
3378                           s->authorized_macs[j], ETH_ALEN);
3379                 i++;
3380         }
3381         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3382                     (u8 *) reg->authorized_macs_union,
3383                     sizeof(reg->authorized_macs_union));
3384 }
3385 #endif /* CONFIG_WPS_UPNP */
3386
3387
3388 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3389 {
3390 #ifdef CONFIG_WPS_UPNP
3391         struct subscription *s;
3392
3393         if (reg->wps->wps_upnp == NULL)
3394                 return;
3395
3396         dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3397                          struct subscription, list) {
3398                 struct subscr_addr *sa;
3399                 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3400                 if (sa) {
3401                         wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3402                                    inet_ntoa(sa->saddr.sin_addr),
3403                                    ntohs(sa->saddr.sin_port));
3404                 }
3405                 if (s->selected_registrar)
3406                         wps_registrar_sel_reg_add(reg, s);
3407                 else
3408                         wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3409                                    "selected");
3410         }
3411 #endif /* CONFIG_WPS_UPNP */
3412 }
3413
3414
3415 /**
3416  * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3417  * @reg: Registrar data from wps_registrar_init()
3418  *
3419  * This function is called when selected registrar state changes, e.g., when an
3420  * AP receives a SetSelectedRegistrar UPnP message.
3421  */
3422 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3423                                               u16 dev_pw_id)
3424 {
3425         wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3426
3427         reg->sel_reg_union = reg->selected_registrar;
3428         reg->sel_reg_dev_password_id_override = -1;
3429         reg->sel_reg_config_methods_override = -1;
3430         os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3431                   WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3432         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3433                     (u8 *) reg->authorized_macs_union,
3434                     sizeof(reg->authorized_macs_union));
3435         if (reg->selected_registrar) {
3436                 u16 methods;
3437
3438                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3439                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3440                              WPS_CONFIG_PHY_PUSHBUTTON);
3441                 if (reg->pbc) {
3442                         reg->sel_reg_dev_password_id_override =
3443                                 DEV_PW_PUSHBUTTON;
3444                         wps_set_pushbutton(&methods, reg->wps->config_methods);
3445                 } else if (dev_pw_id)
3446                         reg->sel_reg_dev_password_id_override = dev_pw_id;
3447                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3448                            "(pbc=%d)", reg->pbc);
3449                 reg->sel_reg_config_methods_override = methods;
3450         } else
3451                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3452
3453         wps_registrar_sel_reg_union(reg);
3454
3455         wps_set_ie(reg);
3456         wps_cb_set_sel_reg(reg);
3457 }
3458
3459
3460 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3461                            char *buf, size_t buflen)
3462 {
3463         struct wps_registrar_device *d;
3464         int len = 0, ret;
3465         char uuid[40];
3466         char devtype[WPS_DEV_TYPE_BUFSIZE];
3467
3468         d = wps_device_get(reg, addr);
3469         if (d == NULL)
3470                 return 0;
3471         if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3472                 return 0;
3473
3474         ret = os_snprintf(buf + len, buflen - len,
3475                           "wpsUuid=%s\n"
3476                           "wpsPrimaryDeviceType=%s\n"
3477                           "wpsDeviceName=%s\n"
3478                           "wpsManufacturer=%s\n"
3479                           "wpsModelName=%s\n"
3480                           "wpsModelNumber=%s\n"
3481                           "wpsSerialNumber=%s\n",
3482                           uuid,
3483                           wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3484                                                sizeof(devtype)),
3485                           d->dev.device_name ? d->dev.device_name : "",
3486                           d->dev.manufacturer ? d->dev.manufacturer : "",
3487                           d->dev.model_name ? d->dev.model_name : "",
3488                           d->dev.model_number ? d->dev.model_number : "",
3489                           d->dev.serial_number ? d->dev.serial_number : "");
3490         if (ret < 0 || (size_t) ret >= buflen - len)
3491                 return len;
3492         len += ret;
3493
3494         return len;
3495 }
3496
3497
3498 int wps_registrar_config_ap(struct wps_registrar *reg,
3499                             struct wps_credential *cred)
3500 {
3501         wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3502         if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3503                                  WPS_ENCR_AES))) {
3504                 if (cred->encr_type & WPS_ENCR_WEP) {
3505                         wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3506                                    "due to WEP configuration");
3507                         return -1;
3508                 }
3509
3510                 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3511                            "invalid encr_type 0x%x", cred->encr_type);
3512                 return -1;
3513         }
3514
3515         if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3516             WPS_ENCR_TKIP) {
3517                 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3518                            "TKIP+AES");
3519                 cred->encr_type |= WPS_ENCR_AES;
3520         }
3521
3522         if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3523             WPS_AUTH_WPAPSK) {
3524                 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3525                            "WPAPSK+WPA2PSK");
3526                 cred->auth_type |= WPS_AUTH_WPA2PSK;
3527         }
3528
3529         if (reg->wps->cred_cb)
3530                 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3531
3532         return -1;
3533 }
3534
3535
3536 #ifdef CONFIG_WPS_NFC
3537
3538 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3539                                    const u8 *pubkey_hash, u16 pw_id,
3540                                    const u8 *dev_pw, size_t dev_pw_len,
3541                                    int pk_hash_provided_oob)
3542 {
3543         struct wps_nfc_pw_token *token;
3544
3545         if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3546                 return -1;
3547
3548         if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3549             (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3550                 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3551                            "addition - missing public key hash");
3552                 return -1;
3553         }
3554
3555         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, pw_id);
3556
3557         token = os_zalloc(sizeof(*token));
3558         if (token == NULL)
3559                 return -1;
3560
3561         token->peer_pk_hash_known = pubkey_hash != NULL;
3562         if (pubkey_hash)
3563                 os_memcpy(token->pubkey_hash, pubkey_hash,
3564                           WPS_OOB_PUBKEY_HASH_LEN);
3565         token->pw_id = pw_id;
3566         token->pk_hash_provided_oob = pk_hash_provided_oob;
3567         if (dev_pw) {
3568                 wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3569                                            sizeof(token->dev_pw),
3570                                            dev_pw, dev_pw_len);
3571                 token->dev_pw_len = dev_pw_len * 2;
3572         }
3573
3574         dl_list_add(&reg->nfc_pw_tokens, &token->list);
3575
3576         reg->selected_registrar = 1;
3577         reg->pbc = 0;
3578         wps_registrar_add_authorized_mac(reg,
3579                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
3580         wps_registrar_selected_registrar_changed(reg, pw_id);
3581         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3582         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3583                                wps_registrar_set_selected_timeout,
3584                                reg, NULL);
3585
3586         wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3587                    pw_id);
3588
3589         return 0;
3590 }
3591
3592
3593 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3594                                          const u8 *oob_dev_pw,
3595                                          size_t oob_dev_pw_len)
3596 {
3597         const u8 *pos, *hash, *dev_pw;
3598         u16 id;
3599         size_t dev_pw_len;
3600
3601         if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3602             oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3603             WPS_OOB_DEVICE_PASSWORD_LEN)
3604                 return -1;
3605
3606         hash = oob_dev_pw;
3607         pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3608         id = WPA_GET_BE16(pos);
3609         dev_pw = pos + 2;
3610         dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3611
3612         wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3613                    id);
3614
3615         wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3616                     hash, WPS_OOB_PUBKEY_HASH_LEN);
3617         wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3618
3619         return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3620                                               dev_pw_len, 0);
3621 }
3622
3623
3624 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3625                                        struct wps_nfc_pw_token *token)
3626 {
3627         wps_registrar_remove_authorized_mac(reg,
3628                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
3629         wps_registrar_selected_registrar_changed(reg, 0);
3630
3631         /*
3632          * Free the NFC password token if it was used only for a single protocol
3633          * run. The static handover case uses the same password token multiple
3634          * times, so do not free that case here.
3635          */
3636         if (token->peer_pk_hash_known)
3637                 os_free(token);
3638 }
3639
3640 #endif /* CONFIG_WPS_NFC */