libeap/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         bin_clear_free(token, sizeof(*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         bin_clear_free(pin->pin, pin->pin_len);
  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 void wps_registrar_flush(struct wps_registrar *reg)
 680 {
 681         if (reg == NULL)
 682                 return;
 683         wps_free_pins(&reg->pins);
 684         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, 0);
 685         wps_free_pbc_sessions(reg->pbc_sessions);
 686         reg->pbc_sessions = NULL;
 687         wps_free_devices(reg->devices);
 688         reg->devices = NULL;
 689 #ifdef WPS_WORKAROUNDS
 690         reg->pbc_ignore_start.sec = 0;
 691 #endif /* WPS_WORKAROUNDS */
 692 }
 693
 694
 695 /**
 696  * wps_registrar_deinit - Deinitialize WPS Registrar data
 697  * @reg: Registrar data from wps_registrar_init()
 698  */
 699 void wps_registrar_deinit(struct wps_registrar *reg)
 700 {
 701         if (reg == NULL)
 702                 return;
 703         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 704         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 705         wps_registrar_flush(reg);
 706         wpabuf_free(reg->extra_cred);
 707         os_free(reg);
 708 }
 709
 710
 711 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
 712 {
 713         struct wps_uuid_pin *pin;
 714
 715         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 716                 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
 717                         wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
 718                                    "configured wildcard PIN");
 719                         wps_registrar_remove_pin(reg, pin);
 720                         break;
 721                 }
 722         }
 723 }
 724
 725
 726 /**
 727  * wps_registrar_add_pin - Configure a new PIN for Registrar
 728  * @reg: Registrar data from wps_registrar_init()
 729  * @addr: Enrollee MAC address or %NULL if not known
 730  * @uuid: UUID-E or %NULL for wildcard (any UUID)
 731  * @pin: PIN (Device Password)
 732  * @pin_len: Length of pin in octets
 733  * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
 734  * Returns: 0 on success, -1 on failure
 735  */
 736 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
 737                           const u8 *uuid, const u8 *pin, size_t pin_len,
 738                           int timeout)
 739 {
 740         struct wps_uuid_pin *p;
 741
 742         p = os_zalloc(sizeof(*p));
 743         if (p == NULL)
 744                 return -1;
 745         if (addr)
 746                 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
 747         if (uuid == NULL)
 748                 p->wildcard_uuid = 1;
 749         else
 750                 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
 751         p->pin = os_malloc(pin_len);
 752         if (p->pin == NULL) {
 753                 os_free(p);
 754                 return -1;
 755         }
 756         os_memcpy(p->pin, pin, pin_len);
 757         p->pin_len = pin_len;
 758
 759         if (timeout) {
 760                 p->flags |= PIN_EXPIRES;
 761                 os_get_reltime(&p->expiration);
 762                 p->expiration.sec += timeout;
 763         }
 764
 765         if (p->wildcard_uuid)
 766                 wps_registrar_invalidate_unused(reg);
 767
 768         dl_list_add(&reg->pins, &p->list);
 769
 770         wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
 771                    timeout);
 772         wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
 773         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
 774         reg->selected_registrar = 1;
 775         reg->pbc = 0;
 776         if (addr)
 777                 wps_registrar_add_authorized_mac(reg, addr);
 778         else
 779                 wps_registrar_add_authorized_mac(
 780                         reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
 781         wps_registrar_selected_registrar_changed(reg, 0);
 782         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 783         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
 784                                wps_registrar_set_selected_timeout,
 785                                reg, NULL);
 786
 787         return 0;
 788 }
 789
 790
 791 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 792                                      struct wps_uuid_pin *pin)
 793 {
 794         u8 *addr;
 795         u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 796
 797         if (is_zero_ether_addr(pin->enrollee_addr))
 798                 addr = bcast;
 799         else
 800                 addr = pin->enrollee_addr;
 801         wps_registrar_remove_authorized_mac(reg, addr);
 802         wps_remove_pin(pin);
 803         wps_registrar_selected_registrar_changed(reg, 0);
 804 }
 805
 806
 807 static void wps_registrar_expire_pins(struct wps_registrar *reg)
 808 {
 809         struct wps_uuid_pin *pin, *prev;
 810         struct os_reltime now;
 811
 812         os_get_reltime(&now);
 813         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 814         {
 815                 if ((pin->flags & PIN_EXPIRES) &&
 816                     os_reltime_before(&pin->expiration, &now)) {
 817                         wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
 818                                     pin->uuid, WPS_UUID_LEN);
 819                         wps_registrar_remove_pin(reg, pin);
 820                 }
 821         }
 822 }
 823
 824
 825 /**
 826  * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
 827  * @reg: Registrar data from wps_registrar_init()
 828  * @dev_pw: PIN to search for or %NULL to match any
 829  * @dev_pw_len: Length of dev_pw in octets
 830  * Returns: 0 on success, -1 if not wildcard PIN is enabled
 831  */
 832 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
 833                                                  const u8 *dev_pw,
 834                                                  size_t dev_pw_len)
 835 {
 836         struct wps_uuid_pin *pin, *prev;
 837
 838         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 839         {
 840                 if (dev_pw && pin->pin &&
 841                     (dev_pw_len != pin->pin_len ||
 842                      os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0))
 843                         continue; /* different PIN */
 844                 if (pin->wildcard_uuid) {
 845                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 846                                     pin->uuid, WPS_UUID_LEN);
 847                         wps_registrar_remove_pin(reg, pin);
 848                         return 0;
 849                 }
 850         }
 851
 852         return -1;
 853 }
 854
 855
 856 /**
 857  * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
 858  * @reg: Registrar data from wps_registrar_init()
 859  * @uuid: UUID-E
 860  * Returns: 0 on success, -1 on failure (e.g., PIN not found)
 861  */
 862 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
 863 {
 864         struct wps_uuid_pin *pin, *prev;
 865
 866         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 867         {
 868                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 869                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 870                                     pin->uuid, WPS_UUID_LEN);
 871                         wps_registrar_remove_pin(reg, pin);
 872                         return 0;
 873                 }
 874         }
 875
 876         return -1;
 877 }
 878
 879
 880 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
 881                                         const u8 *uuid, size_t *pin_len)
 882 {
 883         struct wps_uuid_pin *pin, *found = NULL;
 884
 885         wps_registrar_expire_pins(reg);
 886
 887         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 888                 if (!pin->wildcard_uuid &&
 889                     os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 890                         found = pin;
 891                         break;
 892                 }
 893         }
 894
 895         if (!found) {
 896                 /* Check for wildcard UUIDs since none of the UUID-specific
 897                  * PINs matched */
 898                 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 899                         if (pin->wildcard_uuid == 1 ||
 900                             pin->wildcard_uuid == 2) {
 901                                 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
 902                                            "PIN. Assigned it for this UUID-E");
 903                                 pin->wildcard_uuid++;
 904                                 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
 905                                 found = pin;
 906                                 break;
 907                         }
 908                 }
 909         }
 910
 911         if (!found)
 912                 return NULL;
 913
 914         /*
 915          * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
 916          * that could otherwise avoid PIN invalidations.
 917          */
 918         if (found->flags & PIN_LOCKED) {
 919                 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
 920                            "allow concurrent re-use");
 921                 return NULL;
 922         }
 923         *pin_len = found->pin_len;
 924         found->flags |= PIN_LOCKED;
 925         return found->pin;
 926 }
 927
 928
 929 /**
 930  * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
 931  * @reg: Registrar data from wps_registrar_init()
 932  * @uuid: UUID-E
 933  * Returns: 0 on success, -1 on failure
 934  *
 935  * PINs are locked to enforce only one concurrent use. This function unlocks a
 936  * PIN to allow it to be used again. If the specified PIN was configured using
 937  * a wildcard UUID, it will be removed instead of allowing multiple uses.
 938  */
 939 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
 940 {
 941         struct wps_uuid_pin *pin;
 942
 943         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 944                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 945                         if (pin->wildcard_uuid == 3) {
 946                                 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
 947                                            "wildcard PIN");
 948                                 return wps_registrar_invalidate_pin(reg, uuid);
 949                         }
 950                         pin->flags &= ~PIN_LOCKED;
 951                         return 0;
 952                 }
 953         }
 954
 955         return -1;
 956 }
 957
 958
 959 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
 960 {
 961         reg->selected_registrar = 0;
 962         reg->pbc = 0;
 963         os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
 964         wps_registrar_remove_authorized_mac(reg,
 965                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
 966         wps_registrar_selected_registrar_changed(reg, 0);
 967 }
 968
 969
 970 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
 971 {
 972         struct wps_registrar *reg = eloop_ctx;
 973
 974         wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
 975         wps_pbc_timeout_event(reg->wps);
 976         wps_registrar_stop_pbc(reg);
 977 }
 978
 979
 980 /**
 981  * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
 982  * @reg: Registrar data from wps_registrar_init()
 983  * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
 984  *      indicates no such filtering
 985  * Returns: 0 on success, -1 on failure, -2 on session overlap
 986  *
 987  * This function is called on an AP when a push button is pushed to activate
 988  * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
 989  * or when a PBC registration is completed. If more than one Enrollee in active
 990  * PBC mode has been detected during the monitor time (previous 2 minutes), the
 991  * PBC mode is not activated and -2 is returned to indicate session overlap.
 992  * This is skipped if a specific Enrollee is selected.
 993  */
 994 int wps_registrar_button_pushed(struct wps_registrar *reg,
 995                                 const u8 *p2p_dev_addr)
 996 {
 997         if (p2p_dev_addr == NULL &&
 998             wps_registrar_pbc_overlap(reg, NULL, NULL)) {
 999                 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
1000                            "mode");
1001                 wps_pbc_overlap_event(reg->wps);
1002                 return -2;
1003         }
1004         wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
1005         reg->force_pbc_overlap = 0;
1006         reg->selected_registrar = 1;
1007         reg->pbc = 1;
1008         if (p2p_dev_addr)
1009                 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
1010         else
1011                 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1012         wps_registrar_add_authorized_mac(reg,
1013                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
1014         wps_registrar_selected_registrar_changed(reg, 0);
1015
1016         wps_pbc_active_event(reg->wps);
1017         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1018         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1019         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1020                                reg, NULL);
1021         return 0;
1022 }
1023
1024
1025 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1026 {
1027         wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1028         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1029         wps_registrar_stop_pbc(reg);
1030         wps_pbc_disable_event(reg->wps);
1031 }
1032
1033
1034 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1035 {
1036         wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1037         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1038         reg->selected_registrar = 0;
1039         wps_registrar_selected_registrar_changed(reg, 0);
1040 }
1041
1042
1043 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1044                             const u8 *dev_pw, size_t dev_pw_len)
1045 {
1046         if (registrar->pbc) {
1047                 wps_registrar_remove_pbc_session(registrar,
1048                                                  uuid_e, NULL);
1049                 wps_registrar_pbc_completed(registrar);
1050 #ifdef WPS_WORKAROUNDS
1051                 os_get_reltime(&registrar->pbc_ignore_start);
1052 #endif /* WPS_WORKAROUNDS */
1053                 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1054         } else {
1055                 wps_registrar_pin_completed(registrar);
1056         }
1057
1058         if (dev_pw &&
1059             wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1060                                                   dev_pw_len) == 0) {
1061                 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1062                                 dev_pw, dev_pw_len);
1063         }
1064 }
1065
1066
1067 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1068 {
1069         if (reg->pbc) {
1070                 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1071                 wps_registrar_pbc_timeout(reg, NULL);
1072                 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1073                 return 1;
1074         } else if (reg->selected_registrar) {
1075                 /* PIN Method */
1076                 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1077                 wps_registrar_pin_completed(reg);
1078                 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1079                 return 1;
1080         }
1081         return 0;
1082 }
1083
1084
1085 /**
1086  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1087  * @reg: Registrar data from wps_registrar_init()
1088  * @addr: MAC address of the Probe Request sender
1089  * @wps_data: WPS IE contents
1090  *
1091  * This function is called on an AP when a Probe Request with WPS IE is
1092  * received. This is used to track PBC mode use and to detect possible overlap
1093  * situation with other WPS APs.
1094  */
1095 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1096                                 const struct wpabuf *wps_data,
1097                                 int p2p_wildcard)
1098 {
1099         struct wps_parse_attr attr;
1100         int skip_add = 0;
1101
1102         wpa_hexdump_buf(MSG_MSGDUMP,
1103                         "WPS: Probe Request with WPS data received",
1104                         wps_data);
1105
1106         if (wps_parse_msg(wps_data, &attr) < 0)
1107                 return;
1108
1109         if (attr.config_methods == NULL) {
1110                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1111                            "Probe Request");
1112                 return;
1113         }
1114
1115         if (attr.dev_password_id == NULL) {
1116                 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1117                            "in Probe Request");
1118                 return;
1119         }
1120
1121         if (reg->enrollee_seen_cb && attr.uuid_e &&
1122             attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1123                 char *dev_name = NULL;
1124                 if (attr.dev_name) {
1125                         dev_name = os_zalloc(attr.dev_name_len + 1);
1126                         if (dev_name) {
1127                                 os_memcpy(dev_name, attr.dev_name,
1128                                           attr.dev_name_len);
1129                         }
1130                 }
1131                 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1132                                       attr.primary_dev_type,
1133                                       WPA_GET_BE16(attr.config_methods),
1134                                       WPA_GET_BE16(attr.dev_password_id),
1135                                       *attr.request_type, dev_name);
1136                 os_free(dev_name);
1137         }
1138
1139         if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1140                 return; /* Not PBC */
1141
1142         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1143                    MACSTR, MAC2STR(addr));
1144         if (attr.uuid_e == NULL) {
1145                 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1146                            "UUID-E included");
1147                 return;
1148         }
1149         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1150                     WPS_UUID_LEN);
1151
1152 #ifdef WPS_WORKAROUNDS
1153         if (reg->pbc_ignore_start.sec &&
1154             os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1155                 struct os_reltime now, dur;
1156                 os_get_reltime(&now);
1157                 os_reltime_sub(&now, &reg->pbc_ignore_start, &dur);
1158                 if (dur.sec >= 0 && dur.sec < 5) {
1159                         wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1160                                    "based on Probe Request from the Enrollee "
1161                                    "that just completed PBC provisioning");
1162                         skip_add = 1;
1163                 } else
1164                         reg->pbc_ignore_start.sec = 0;
1165         }
1166 #endif /* WPS_WORKAROUNDS */
1167
1168         if (!skip_add)
1169                 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1170         if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1171                 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1172                 reg->force_pbc_overlap = 1;
1173                 wps_pbc_overlap_event(reg->wps);
1174         }
1175 }
1176
1177
1178 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1179                    const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1180 {
1181         if (reg->new_psk_cb == NULL)
1182                 return 0;
1183
1184         return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1185                                psk_len);
1186 }
1187
1188
1189 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1190                               const struct wps_device_data *dev)
1191 {
1192         if (reg->pin_needed_cb == NULL)
1193                 return;
1194
1195         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1196 }
1197
1198
1199 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1200                                const u8 *uuid_e, const u8 *dev_pw,
1201                                size_t dev_pw_len)
1202 {
1203         if (reg->reg_success_cb == NULL)
1204                 return;
1205
1206         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1207 }
1208
1209
1210 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1211                          struct wpabuf *probe_resp_ie)
1212 {
1213         return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1214 }
1215
1216
1217 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1218 {
1219         u16 methods = 0;
1220         if (reg->set_sel_reg_cb == NULL)
1221                 return;
1222
1223         if (reg->selected_registrar) {
1224                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1225                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1226                              WPS_CONFIG_PHY_PUSHBUTTON);
1227                 if (reg->pbc)
1228                         wps_set_pushbutton(&methods, reg->wps->config_methods);
1229         }
1230
1231         wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1232                    "config_methods=0x%x pbc=%d methods=0x%x",
1233                    reg->selected_registrar, reg->wps->config_methods,
1234                    reg->pbc, methods);
1235
1236         reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1237                             reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1238                             methods);
1239 }
1240
1241
1242 static int wps_set_ie(struct wps_registrar *reg)
1243 {
1244         struct wpabuf *beacon;
1245         struct wpabuf *probe;
1246         const u8 *auth_macs;
1247         size_t count;
1248         size_t vendor_len = 0;
1249         int i;
1250
1251         if (reg->set_ie_cb == NULL)
1252                 return 0;
1253
1254         for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1255                 if (reg->wps->dev.vendor_ext[i]) {
1256                         vendor_len += 2 + 2;
1257                         vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1258                 }
1259         }
1260
1261         beacon = wpabuf_alloc(400 + vendor_len);
1262         if (beacon == NULL)
1263                 return -1;
1264         probe = wpabuf_alloc(500 + vendor_len);
1265         if (probe == NULL) {
1266                 wpabuf_free(beacon);
1267                 return -1;
1268         }
1269
1270         auth_macs = wps_authorized_macs(reg, &count);
1271
1272         wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1273
1274         if (wps_build_version(beacon) ||
1275             wps_build_wps_state(reg->wps, beacon) ||
1276             wps_build_ap_setup_locked(reg->wps, beacon) ||
1277             wps_build_selected_registrar(reg, beacon) ||
1278             wps_build_sel_reg_dev_password_id(reg, beacon) ||
1279             wps_build_sel_reg_config_methods(reg, beacon) ||
1280             wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1281             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon, 0)) ||
1282             wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1283             wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1284                 wpabuf_free(beacon);
1285                 wpabuf_free(probe);
1286                 return -1;
1287         }
1288
1289 #ifdef CONFIG_P2P
1290         if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1291             wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1292                 wpabuf_free(beacon);
1293                 wpabuf_free(probe);
1294                 return -1;
1295         }
1296 #endif /* CONFIG_P2P */
1297
1298         wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1299
1300         if (wps_build_version(probe) ||
1301             wps_build_wps_state(reg->wps, probe) ||
1302             wps_build_ap_setup_locked(reg->wps, probe) ||
1303             wps_build_selected_registrar(reg, probe) ||
1304             wps_build_sel_reg_dev_password_id(reg, probe) ||
1305             wps_build_sel_reg_config_methods(reg, probe) ||
1306             wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1307                                 WPS_RESP_REGISTRAR) ||
1308             wps_build_uuid_e(probe, reg->wps->uuid) ||
1309             wps_build_device_attrs(&reg->wps->dev, probe) ||
1310             wps_build_probe_config_methods(reg, probe) ||
1311             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, probe, 0)) ||
1312             wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1313             wps_build_vendor_ext(&reg->wps->dev, probe)) {
1314                 wpabuf_free(beacon);
1315                 wpabuf_free(probe);
1316                 return -1;
1317         }
1318
1319         beacon = wps_ie_encapsulate(beacon);
1320         probe = wps_ie_encapsulate(probe);
1321
1322         if (!beacon || !probe) {
1323                 wpabuf_free(beacon);
1324                 wpabuf_free(probe);
1325                 return -1;
1326         }
1327
1328         if (reg->static_wep_only) {
1329                 /*
1330                  * Windows XP and Vista clients can get confused about
1331                  * EAP-Identity/Request when they probe the network with
1332                  * EAPOL-Start. In such a case, they may assume the network is
1333                  * using IEEE 802.1X and prompt user for a certificate while
1334                  * the correct (non-WPS) behavior would be to ask for the
1335                  * static WEP key. As a workaround, use Microsoft Provisioning
1336                  * IE to advertise that legacy 802.1X is not supported.
1337                  */
1338                 const u8 ms_wps[7] = {
1339                         WLAN_EID_VENDOR_SPECIFIC, 5,
1340                         /* Microsoft Provisioning IE (00:50:f2:5) */
1341                         0x00, 0x50, 0xf2, 5,
1342                         0x00 /* no legacy 802.1X or MS WPS */
1343                 };
1344                 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1345                            "into Beacon/Probe Response frames");
1346                 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1347                 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1348         }
1349
1350         return wps_cb_set_ie(reg, beacon, probe);
1351 }
1352
1353
1354 static int wps_get_dev_password(struct wps_data *wps)
1355 {
1356         const u8 *pin;
1357         size_t pin_len = 0;
1358
1359         bin_clear_free(wps->dev_password, wps->dev_password_len);
1360         wps->dev_password = NULL;
1361
1362         if (wps->pbc) {
1363                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1364                 pin = (const u8 *) "00000000";
1365                 pin_len = 8;
1366 #ifdef CONFIG_WPS_NFC
1367         } else if (wps->nfc_pw_token) {
1368                 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1369                 {
1370                         wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1371                                    "handover and abbreviated WPS handshake "
1372                                    "without Device Password");
1373                         return 0;
1374                 }
1375                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1376                            "Password Token");
1377                 pin = wps->nfc_pw_token->dev_pw;
1378                 pin_len = wps->nfc_pw_token->dev_pw_len;
1379         } else if (wps->dev_pw_id >= 0x10 &&
1380                    wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1381                    wps->wps->ap_nfc_dev_pw) {
1382                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1383                 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1384                 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1385 #endif /* CONFIG_WPS_NFC */
1386         } else {
1387                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1388                                             &pin_len);
1389                 if (pin && wps->dev_pw_id >= 0x10) {
1390                         wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1391                                    "Password ID, but PIN found");
1392                         /*
1393                          * See whether Enrollee is willing to use PIN instead.
1394                          */
1395                         wps->dev_pw_id = DEV_PW_DEFAULT;
1396                 }
1397         }
1398         if (pin == NULL) {
1399                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1400                            "the Enrollee (context %p registrar %p)",
1401                            wps->wps, wps->wps->registrar);
1402                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1403                                   &wps->peer_dev);
1404                 return -1;
1405         }
1406
1407         wps->dev_password = os_malloc(pin_len);
1408         if (wps->dev_password == NULL)
1409                 return -1;
1410         os_memcpy(wps->dev_password, pin, pin_len);
1411         wps->dev_password_len = pin_len;
1412
1413         return 0;
1414 }
1415
1416
1417 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1418 {
1419         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1420         wpabuf_put_be16(msg, ATTR_UUID_R);
1421         wpabuf_put_be16(msg, WPS_UUID_LEN);
1422         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1423         return 0;
1424 }
1425
1426
1427 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1428 {
1429         u8 *hash;
1430         const u8 *addr[4];
1431         size_t len[4];
1432
1433         if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1434                 return -1;
1435         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1436         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1437                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1438
1439         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1440                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1441                            "R-Hash derivation");
1442                 return -1;
1443         }
1444
1445         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1446         wpabuf_put_be16(msg, ATTR_R_HASH1);
1447         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1448         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1449         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1450         addr[0] = wps->snonce;
1451         len[0] = WPS_SECRET_NONCE_LEN;
1452         addr[1] = wps->psk1;
1453         len[1] = WPS_PSK_LEN;
1454         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1455         len[2] = wpabuf_len(wps->dh_pubkey_e);
1456         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1457         len[3] = wpabuf_len(wps->dh_pubkey_r);
1458         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1459         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1460
1461         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1462         wpabuf_put_be16(msg, ATTR_R_HASH2);
1463         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1464         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1465         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1466         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1467         addr[1] = wps->psk2;
1468         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1469         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1470
1471         return 0;
1472 }
1473
1474
1475 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1476 {
1477         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1478         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1479         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1480         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1481         return 0;
1482 }
1483
1484
1485 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1486 {
1487         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1488         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1489         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1490         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1491                         WPS_SECRET_NONCE_LEN);
1492         return 0;
1493 }
1494
1495
1496 static int wps_build_cred_network_idx(struct wpabuf *msg,
1497                                       const struct wps_credential *cred)
1498 {
1499         wpa_printf(MSG_DEBUG, "WPS:  * Network Index (1)");
1500         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1501         wpabuf_put_be16(msg, 1);
1502         wpabuf_put_u8(msg, 1);
1503         return 0;
1504 }
1505
1506
1507 static int wps_build_cred_ssid(struct wpabuf *msg,
1508                                const struct wps_credential *cred)
1509 {
1510         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1511         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1512                           cred->ssid, cred->ssid_len);
1513         wpabuf_put_be16(msg, ATTR_SSID);
1514         wpabuf_put_be16(msg, cred->ssid_len);
1515         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1516         return 0;
1517 }
1518
1519
1520 static int wps_build_cred_auth_type(struct wpabuf *msg,
1521                                     const struct wps_credential *cred)
1522 {
1523         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1524                    cred->auth_type);
1525         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1526         wpabuf_put_be16(msg, 2);
1527         wpabuf_put_be16(msg, cred->auth_type);
1528         return 0;
1529 }
1530
1531
1532 static int wps_build_cred_encr_type(struct wpabuf *msg,
1533                                     const struct wps_credential *cred)
1534 {
1535         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1536                    cred->encr_type);
1537         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1538         wpabuf_put_be16(msg, 2);
1539         wpabuf_put_be16(msg, cred->encr_type);
1540         return 0;
1541 }
1542
1543
1544 static int wps_build_cred_network_key(struct wpabuf *msg,
1545                                       const struct wps_credential *cred)
1546 {
1547         wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1548                    (int) cred->key_len);
1549         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1550                         cred->key, cred->key_len);
1551         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1552         wpabuf_put_be16(msg, cred->key_len);
1553         wpabuf_put_data(msg, cred->key, cred->key_len);
1554         return 0;
1555 }
1556
1557
1558 static int wps_build_credential(struct wpabuf *msg,
1559                                 const struct wps_credential *cred)
1560 {
1561         if (wps_build_cred_network_idx(msg, cred) ||
1562             wps_build_cred_ssid(msg, cred) ||
1563             wps_build_cred_auth_type(msg, cred) ||
1564             wps_build_cred_encr_type(msg, cred) ||
1565             wps_build_cred_network_key(msg, cred) ||
1566             wps_build_mac_addr(msg, cred->mac_addr))
1567                 return -1;
1568         return 0;
1569 }
1570
1571
1572 int wps_build_credential_wrap(struct wpabuf *msg,
1573                               const struct wps_credential *cred)
1574 {
1575         struct wpabuf *wbuf;
1576         wbuf = wpabuf_alloc(200);
1577         if (wbuf == NULL)
1578                 return -1;
1579         if (wps_build_credential(wbuf, cred)) {
1580                 wpabuf_free(wbuf);
1581                 return -1;
1582         }
1583         wpabuf_put_be16(msg, ATTR_CRED);
1584         wpabuf_put_be16(msg, wpabuf_len(wbuf));
1585         wpabuf_put_buf(msg, wbuf);
1586         wpabuf_free(wbuf);
1587         return 0;
1588 }
1589
1590
1591 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1592 {
1593         struct wpabuf *cred;
1594
1595         if (wps->wps->registrar->skip_cred_build)
1596                 goto skip_cred_build;
1597
1598         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1599         if (wps->use_cred) {
1600                 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1601                 goto use_provided;
1602         }
1603         os_memset(&wps->cred, 0, sizeof(wps->cred));
1604
1605         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1606         wps->cred.ssid_len = wps->wps->ssid_len;
1607
1608         /* Select the best authentication and encryption type */
1609         if (wps->auth_type & WPS_AUTH_WPA2PSK)
1610                 wps->auth_type = WPS_AUTH_WPA2PSK;
1611         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1612                 wps->auth_type = WPS_AUTH_WPAPSK;
1613         else if (wps->auth_type & WPS_AUTH_OPEN)
1614                 wps->auth_type = WPS_AUTH_OPEN;
1615         else {
1616                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1617                            wps->auth_type);
1618                 return -1;
1619         }
1620         wps->cred.auth_type = wps->auth_type;
1621
1622         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1623             wps->auth_type == WPS_AUTH_WPAPSK) {
1624                 if (wps->encr_type & WPS_ENCR_AES)
1625                         wps->encr_type = WPS_ENCR_AES;
1626                 else if (wps->encr_type & WPS_ENCR_TKIP)
1627                         wps->encr_type = WPS_ENCR_TKIP;
1628                 else {
1629                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1630                                    "type for WPA/WPA2");
1631                         return -1;
1632                 }
1633         } else {
1634                 if (wps->encr_type & WPS_ENCR_NONE)
1635                         wps->encr_type = WPS_ENCR_NONE;
1636 #ifdef CONFIG_TESTING_OPTIONS
1637                 else if (wps->encr_type & WPS_ENCR_WEP)
1638                         wps->encr_type = WPS_ENCR_WEP;
1639 #endif /* CONFIG_TESTING_OPTIONS */
1640                 else {
1641                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1642                                    "type for non-WPA/WPA2 mode");
1643                         return -1;
1644                 }
1645         }
1646         wps->cred.encr_type = wps->encr_type;
1647         /*
1648          * Set MAC address in the Credential to be the Enrollee's MAC address
1649          */
1650         os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1651
1652         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1653             !wps->wps->registrar->disable_auto_conf) {
1654                 u8 r[16];
1655                 /* Generate a random passphrase */
1656                 if (random_pool_ready() != 1 ||
1657                     random_get_bytes(r, sizeof(r)) < 0) {
1658                         wpa_printf(MSG_INFO,
1659                                    "WPS: Could not generate random PSK");
1660                         return -1;
1661                 }
1662                 os_free(wps->new_psk);
1663                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1664                 if (wps->new_psk == NULL)
1665                         return -1;
1666                 wps->new_psk_len--; /* remove newline */
1667                 while (wps->new_psk_len &&
1668                        wps->new_psk[wps->new_psk_len - 1] == '=')
1669                         wps->new_psk_len--;
1670                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1671                                       wps->new_psk, wps->new_psk_len);
1672                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1673                 wps->cred.key_len = wps->new_psk_len;
1674         } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1675                    wps->use_psk_key && wps->wps->psk_set) {
1676                 char hex[65];
1677                 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1678                 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1679                 os_memcpy(wps->cred.key, hex, 32 * 2);
1680                 wps->cred.key_len = 32 * 2;
1681         } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1682                    wps->wps->network_key) {
1683                 os_memcpy(wps->cred.key, wps->wps->network_key,
1684                           wps->wps->network_key_len);
1685                 wps->cred.key_len = wps->wps->network_key_len;
1686         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1687                 char hex[65];
1688                 /* Generate a random per-device PSK */
1689                 os_free(wps->new_psk);
1690                 wps->new_psk_len = 32;
1691                 wps->new_psk = os_malloc(wps->new_psk_len);
1692                 if (wps->new_psk == NULL)
1693                         return -1;
1694                 if (random_pool_ready() != 1 ||
1695                     random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1696                         wpa_printf(MSG_INFO,
1697                                    "WPS: Could not generate random PSK");
1698                         os_free(wps->new_psk);
1699                         wps->new_psk = NULL;
1700                         return -1;
1701                 }
1702                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1703                                 wps->new_psk, wps->new_psk_len);
1704                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1705                                  wps->new_psk_len);
1706                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1707                 wps->cred.key_len = wps->new_psk_len * 2;
1708         }
1709
1710 use_provided:
1711 #ifdef CONFIG_WPS_TESTING
1712         if (wps_testing_dummy_cred)
1713                 cred = wpabuf_alloc(200);
1714         else
1715                 cred = NULL;
1716         if (cred) {
1717                 struct wps_credential dummy;
1718                 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1719                 os_memset(&dummy, 0, sizeof(dummy));
1720                 os_memcpy(dummy.ssid, "dummy", 5);
1721                 dummy.ssid_len = 5;
1722                 dummy.auth_type = WPS_AUTH_WPA2PSK;
1723                 dummy.encr_type = WPS_ENCR_AES;
1724                 os_memcpy(dummy.key, "dummy psk", 9);
1725                 dummy.key_len = 9;
1726                 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1727                 wps_build_credential(cred, &dummy);
1728                 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1729
1730                 wpabuf_put_be16(msg, ATTR_CRED);
1731                 wpabuf_put_be16(msg, wpabuf_len(cred));
1732                 wpabuf_put_buf(msg, cred);
1733
1734                 wpabuf_free(cred);
1735         }
1736 #endif /* CONFIG_WPS_TESTING */
1737
1738         cred = wpabuf_alloc(200);
1739         if (cred == NULL)
1740                 return -1;
1741
1742         if (wps_build_credential(cred, &wps->cred)) {
1743                 wpabuf_free(cred);
1744                 return -1;
1745         }
1746
1747         wpabuf_put_be16(msg, ATTR_CRED);
1748         wpabuf_put_be16(msg, wpabuf_len(cred));
1749         wpabuf_put_buf(msg, cred);
1750         wpabuf_free(cred);
1751
1752 skip_cred_build:
1753         if (wps->wps->registrar->extra_cred) {
1754                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1755                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1756         }
1757
1758         return 0;
1759 }
1760
1761
1762 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1763 {
1764         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1765
1766         if (wps_build_credential(msg, &wps->cred))
1767                 return -1;
1768
1769         return 0;
1770 }
1771
1772
1773 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1774 {
1775         struct wpabuf *msg, *plain;
1776
1777         msg = wpabuf_alloc(1000);
1778         if (msg == NULL)
1779                 return NULL;
1780
1781         plain = wpabuf_alloc(200);
1782         if (plain == NULL) {
1783                 wpabuf_free(msg);
1784                 return NULL;
1785         }
1786
1787         if (wps_build_ap_settings(wps, plain)) {
1788                 wpabuf_free(plain);
1789                 wpabuf_free(msg);
1790                 return NULL;
1791         }
1792
1793         wpabuf_put_be16(msg, ATTR_CRED);
1794         wpabuf_put_be16(msg, wpabuf_len(plain));
1795         wpabuf_put_buf(msg, plain);
1796         wpabuf_free(plain);
1797
1798         return msg;
1799 }
1800
1801
1802 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1803 {
1804         struct wpabuf *msg;
1805         int config_in_m2 = 0;
1806
1807         if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1808                 return NULL;
1809         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1810                     wps->nonce_r, WPS_NONCE_LEN);
1811         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1812
1813         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1814         msg = wpabuf_alloc(1000);
1815         if (msg == NULL)
1816                 return NULL;
1817
1818         if (wps_build_version(msg) ||
1819             wps_build_msg_type(msg, WPS_M2) ||
1820             wps_build_enrollee_nonce(wps, msg) ||
1821             wps_build_registrar_nonce(wps, msg) ||
1822             wps_build_uuid_r(wps, msg) ||
1823             wps_build_public_key(wps, msg) ||
1824             wps_derive_keys(wps) ||
1825             wps_build_auth_type_flags(wps, msg) ||
1826             wps_build_encr_type_flags(wps, msg) ||
1827             wps_build_conn_type_flags(wps, msg) ||
1828             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1829             wps_build_device_attrs(&wps->wps->dev, msg) ||
1830             wps_build_rf_bands(&wps->wps->dev, msg,
1831                                wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1832             wps_build_assoc_state(wps, msg) ||
1833             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1834             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1835             wps_build_os_version(&wps->wps->dev, msg) ||
1836             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1837                 wpabuf_free(msg);
1838                 return NULL;
1839         }
1840
1841 #ifdef CONFIG_WPS_NFC
1842         if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1843             wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1844                 /*
1845                  * Use abbreviated handshake since public key hash allowed
1846                  * Enrollee to validate our public key similarly to how Enrollee
1847                  * public key was validated. There is no need to validate Device
1848                  * Password in this case.
1849                  */
1850                 struct wpabuf *plain = wpabuf_alloc(500);
1851                 if (plain == NULL ||
1852                     wps_build_cred(wps, plain) ||
1853                     wps_build_key_wrap_auth(wps, plain) ||
1854                     wps_build_encr_settings(wps, msg, plain)) {
1855                         wpabuf_free(msg);
1856                         wpabuf_free(plain);
1857                         return NULL;
1858                 }
1859                 wpabuf_free(plain);
1860                 config_in_m2 = 1;
1861         }
1862 #endif /* CONFIG_WPS_NFC */
1863
1864         if (wps_build_authenticator(wps, msg)) {
1865                 wpabuf_free(msg);
1866                 return NULL;
1867         }
1868
1869         wps->int_reg = 1;
1870         wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1871         return msg;
1872 }
1873
1874
1875 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1876 {
1877         struct wpabuf *msg;
1878         u16 err = wps->config_error;
1879
1880         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1881         msg = wpabuf_alloc(1000);
1882         if (msg == NULL)
1883                 return NULL;
1884
1885         if (wps->wps->ap && wps->wps->ap_setup_locked &&
1886             err == WPS_CFG_NO_ERROR)
1887                 err = WPS_CFG_SETUP_LOCKED;
1888
1889         if (wps_build_version(msg) ||
1890             wps_build_msg_type(msg, WPS_M2D) ||
1891             wps_build_enrollee_nonce(wps, msg) ||
1892             wps_build_registrar_nonce(wps, msg) ||
1893             wps_build_uuid_r(wps, msg) ||
1894             wps_build_auth_type_flags(wps, msg) ||
1895             wps_build_encr_type_flags(wps, msg) ||
1896             wps_build_conn_type_flags(wps, msg) ||
1897             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1898             wps_build_device_attrs(&wps->wps->dev, msg) ||
1899             wps_build_rf_bands(&wps->wps->dev, msg,
1900                                wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1901             wps_build_assoc_state(wps, msg) ||
1902             wps_build_config_error(msg, err) ||
1903             wps_build_os_version(&wps->wps->dev, msg) ||
1904             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1905                 wpabuf_free(msg);
1906                 return NULL;
1907         }
1908
1909         wps->state = RECV_M2D_ACK;
1910         return msg;
1911 }
1912
1913
1914 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1915 {
1916         struct wpabuf *msg, *plain;
1917
1918         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1919
1920         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1921
1922         plain = wpabuf_alloc(200);
1923         if (plain == NULL)
1924                 return NULL;
1925
1926         msg = wpabuf_alloc(1000);
1927         if (msg == NULL) {
1928                 wpabuf_free(plain);
1929                 return NULL;
1930         }
1931
1932         if (wps_build_version(msg) ||
1933             wps_build_msg_type(msg, WPS_M4) ||
1934             wps_build_enrollee_nonce(wps, msg) ||
1935             wps_build_r_hash(wps, msg) ||
1936             wps_build_r_snonce1(wps, plain) ||
1937             wps_build_key_wrap_auth(wps, plain) ||
1938             wps_build_encr_settings(wps, msg, plain) ||
1939             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1940             wps_build_authenticator(wps, msg)) {
1941                 wpabuf_free(plain);
1942                 wpabuf_free(msg);
1943                 return NULL;
1944         }
1945         wpabuf_free(plain);
1946
1947         wps->state = RECV_M5;
1948         return msg;
1949 }
1950
1951
1952 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1953 {
1954         struct wpabuf *msg, *plain;
1955
1956         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1957
1958         plain = wpabuf_alloc(200);
1959         if (plain == NULL)
1960                 return NULL;
1961
1962         msg = wpabuf_alloc(1000);
1963         if (msg == NULL) {
1964                 wpabuf_free(plain);
1965                 return NULL;
1966         }
1967
1968         if (wps_build_version(msg) ||
1969             wps_build_msg_type(msg, WPS_M6) ||
1970             wps_build_enrollee_nonce(wps, msg) ||
1971             wps_build_r_snonce2(wps, plain) ||
1972             wps_build_key_wrap_auth(wps, plain) ||
1973             wps_build_encr_settings(wps, msg, plain) ||
1974             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1975             wps_build_authenticator(wps, msg)) {
1976                 wpabuf_free(plain);
1977                 wpabuf_free(msg);
1978                 return NULL;
1979         }
1980         wpabuf_free(plain);
1981
1982         wps->wps_pin_revealed = 1;
1983         wps->state = RECV_M7;
1984         return msg;
1985 }
1986
1987
1988 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1989 {
1990         struct wpabuf *msg, *plain;
1991
1992         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1993
1994         plain = wpabuf_alloc(500);
1995         if (plain == NULL)
1996                 return NULL;
1997
1998         msg = wpabuf_alloc(1000);
1999         if (msg == NULL) {
2000                 wpabuf_free(plain);
2001                 return NULL;
2002         }
2003
2004         if (wps_build_version(msg) ||
2005             wps_build_msg_type(msg, WPS_M8) ||
2006             wps_build_enrollee_nonce(wps, msg) ||
2007             ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
2008             (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
2009             wps_build_key_wrap_auth(wps, plain) ||
2010             wps_build_encr_settings(wps, msg, plain) ||
2011             wps_build_wfa_ext(msg, 0, NULL, 0) ||
2012             wps_build_authenticator(wps, msg)) {
2013                 wpabuf_free(plain);
2014                 wpabuf_free(msg);
2015                 return NULL;
2016         }
2017         wpabuf_free(plain);
2018
2019         wps->state = RECV_DONE;
2020         return msg;
2021 }
2022
2023
2024 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2025                                       enum wsc_op_code *op_code)
2026 {
2027         struct wpabuf *msg;
2028
2029 #ifdef CONFIG_WPS_UPNP
2030         if (!wps->int_reg && wps->wps->wps_upnp) {
2031                 struct upnp_pending_message *p, *prev = NULL;
2032                 if (wps->ext_reg > 1)
2033                         wps_registrar_free_pending_m2(wps->wps);
2034                 p = wps->wps->upnp_msgs;
2035                 /* TODO: check pending message MAC address */
2036                 while (p && p->next) {
2037                         prev = p;
2038                         p = p->next;
2039                 }
2040                 if (p) {
2041                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2042                                    "UPnP");
2043                         if (prev)
2044                                 prev->next = NULL;
2045                         else
2046                                 wps->wps->upnp_msgs = NULL;
2047                         msg = p->msg;
2048                         switch (p->type) {
2049                         case WPS_WSC_ACK:
2050                                 *op_code = WSC_ACK;
2051                                 break;
2052                         case WPS_WSC_NACK:
2053                                 *op_code = WSC_NACK;
2054                                 break;
2055                         default:
2056                                 *op_code = WSC_MSG;
2057                                 break;
2058                         }
2059                         os_free(p);
2060                         if (wps->ext_reg == 0)
2061                                 wps->ext_reg = 1;
2062                         return msg;
2063                 }
2064         }
2065         if (wps->ext_reg) {
2066                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2067                            "pending message available");
2068                 return NULL;
2069         }
2070 #endif /* CONFIG_WPS_UPNP */
2071
2072         switch (wps->state) {
2073         case SEND_M2:
2074                 if (wps_get_dev_password(wps) < 0)
2075                         msg = wps_build_m2d(wps);
2076                 else
2077                         msg = wps_build_m2(wps);
2078                 *op_code = WSC_MSG;
2079                 break;
2080         case SEND_M2D:
2081                 msg = wps_build_m2d(wps);
2082                 *op_code = WSC_MSG;
2083                 break;
2084         case SEND_M4:
2085                 msg = wps_build_m4(wps);
2086                 *op_code = WSC_MSG;
2087                 break;
2088         case SEND_M6:
2089                 msg = wps_build_m6(wps);
2090                 *op_code = WSC_MSG;
2091                 break;
2092         case SEND_M8:
2093                 msg = wps_build_m8(wps);
2094                 *op_code = WSC_MSG;
2095                 break;
2096         case RECV_DONE:
2097                 msg = wps_build_wsc_ack(wps);
2098                 *op_code = WSC_ACK;
2099                 break;
2100         case SEND_WSC_NACK:
2101                 msg = wps_build_wsc_nack(wps);
2102                 *op_code = WSC_NACK;
2103                 break;
2104         default:
2105                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2106                            "a message", wps->state);
2107                 msg = NULL;
2108                 break;
2109         }
2110
2111         if (*op_code == WSC_MSG && msg) {
2112                 /* Save a copy of the last message for Authenticator derivation
2113                  */
2114                 wpabuf_free(wps->last_msg);
2115                 wps->last_msg = wpabuf_dup(msg);
2116         }
2117
2118         return msg;
2119 }
2120
2121
2122 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2123 {
2124         if (e_nonce == NULL) {
2125                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2126                 return -1;
2127         }
2128
2129         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2130         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2131                     wps->nonce_e, WPS_NONCE_LEN);
2132
2133         return 0;
2134 }
2135
2136
2137 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2138 {
2139         if (r_nonce == NULL) {
2140                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2141                 return -1;
2142         }
2143
2144         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2145                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2146                 return -1;
2147         }
2148
2149         return 0;
2150 }
2151
2152
2153 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2154 {
2155         if (uuid_e == NULL) {
2156                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2157                 return -1;
2158         }
2159
2160         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2161         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2162
2163         return 0;
2164 }
2165
2166
2167 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2168 {
2169         if (pw_id == NULL) {
2170                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2171                 return -1;
2172         }
2173
2174         wps->dev_pw_id = WPA_GET_BE16(pw_id);
2175         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2176
2177         return 0;
2178 }
2179
2180
2181 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2182 {
2183         if (e_hash1 == NULL) {
2184                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2185                 return -1;
2186         }
2187
2188         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2189         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2190
2191         return 0;
2192 }
2193
2194
2195 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2196 {
2197         if (e_hash2 == NULL) {
2198                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2199                 return -1;
2200         }
2201
2202         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2203         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2204
2205         return 0;
2206 }
2207
2208
2209 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2210 {
2211         u8 hash[SHA256_MAC_LEN];
2212         const u8 *addr[4];
2213         size_t len[4];
2214
2215         if (e_snonce1 == NULL) {
2216                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2217                 return -1;
2218         }
2219
2220         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2221                         WPS_SECRET_NONCE_LEN);
2222
2223         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2224         addr[0] = e_snonce1;
2225         len[0] = WPS_SECRET_NONCE_LEN;
2226         addr[1] = wps->psk1;
2227         len[1] = WPS_PSK_LEN;
2228         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2229         len[2] = wpabuf_len(wps->dh_pubkey_e);
2230         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2231         len[3] = wpabuf_len(wps->dh_pubkey_r);
2232         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2233
2234         if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2235                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2236                            "not match with the pre-committed value");
2237                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2238                 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2239                 return -1;
2240         }
2241
2242         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2243                    "half of the device password");
2244
2245         return 0;
2246 }
2247
2248
2249 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2250 {
2251         u8 hash[SHA256_MAC_LEN];
2252         const u8 *addr[4];
2253         size_t len[4];
2254
2255         if (e_snonce2 == NULL) {
2256                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2257                 return -1;
2258         }
2259
2260         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2261                         WPS_SECRET_NONCE_LEN);
2262
2263         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2264         addr[0] = e_snonce2;
2265         len[0] = WPS_SECRET_NONCE_LEN;
2266         addr[1] = wps->psk2;
2267         len[1] = WPS_PSK_LEN;
2268         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2269         len[2] = wpabuf_len(wps->dh_pubkey_e);
2270         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2271         len[3] = wpabuf_len(wps->dh_pubkey_r);
2272         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2273
2274         if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2275                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2276                            "not match with the pre-committed value");
2277                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2278                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2279                 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2280                 return -1;
2281         }
2282
2283         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2284                    "half of the device password");
2285         wps->wps_pin_revealed = 0;
2286         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2287
2288         /*
2289          * In case wildcard PIN is used and WPS handshake succeeds in the first
2290          * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2291          * sure the PIN gets invalidated here.
2292          */
2293         wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2294
2295         return 0;
2296 }
2297
2298
2299 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2300 {
2301         if (mac_addr == NULL) {
2302                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2303                 return -1;
2304         }
2305
2306         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2307                    MAC2STR(mac_addr));
2308         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2309         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2310
2311         return 0;
2312 }
2313
2314
2315 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2316                               size_t pk_len)
2317 {
2318         if (pk == NULL || pk_len == 0) {
2319                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2320                 return -1;
2321         }
2322
2323         wpabuf_free(wps->dh_pubkey_e);
2324         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2325         if (wps->dh_pubkey_e == NULL)
2326                 return -1;
2327
2328         return 0;
2329 }
2330
2331
2332 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2333 {
2334         u16 auth_types;
2335
2336         if (auth == NULL) {
2337                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2338                            "received");
2339                 return -1;
2340         }
2341
2342         auth_types = WPA_GET_BE16(auth);
2343
2344         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2345                    auth_types);
2346         wps->auth_type = wps->wps->auth_types & auth_types;
2347         if (wps->auth_type == 0) {
2348                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2349                            "authentication types (own 0x%x Enrollee 0x%x)",
2350                            wps->wps->auth_types, auth_types);
2351 #ifdef WPS_WORKAROUNDS
2352                 /*
2353                  * Some deployed implementations seem to advertise incorrect
2354                  * information in this attribute. For example, Linksys WRT350N
2355                  * seems to have a byteorder bug that breaks this negotiation.
2356                  * In order to interoperate with existing implementations,
2357                  * assume that the Enrollee supports everything we do.
2358                  */
2359                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2360                            "does not advertise supported authentication types "
2361                            "correctly");
2362                 wps->auth_type = wps->wps->auth_types;
2363 #else /* WPS_WORKAROUNDS */
2364                 return -1;
2365 #endif /* WPS_WORKAROUNDS */
2366         }
2367
2368         return 0;
2369 }
2370
2371
2372 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2373 {
2374         u16 encr_types;
2375
2376         if (encr == NULL) {
2377                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2378                            "received");
2379                 return -1;
2380         }
2381
2382         encr_types = WPA_GET_BE16(encr);
2383
2384         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2385                    encr_types);
2386         wps->encr_type = wps->wps->encr_types & encr_types;
2387         if (wps->encr_type == 0) {
2388                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2389                            "encryption types (own 0x%x Enrollee 0x%x)",
2390                            wps->wps->encr_types, encr_types);
2391 #ifdef WPS_WORKAROUNDS
2392                 /*
2393                  * Some deployed implementations seem to advertise incorrect
2394                  * information in this attribute. For example, Linksys WRT350N
2395                  * seems to have a byteorder bug that breaks this negotiation.
2396                  * In order to interoperate with existing implementations,
2397                  * assume that the Enrollee supports everything we do.
2398                  */
2399                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2400                            "does not advertise supported encryption types "
2401                            "correctly");
2402                 wps->encr_type = wps->wps->encr_types;
2403 #else /* WPS_WORKAROUNDS */
2404                 return -1;
2405 #endif /* WPS_WORKAROUNDS */
2406         }
2407
2408         return 0;
2409 }
2410
2411
2412 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2413 {
2414         if (conn == NULL) {
2415                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2416                            "received");
2417                 return -1;
2418         }
2419
2420         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2421                    *conn);
2422
2423         return 0;
2424 }
2425
2426
2427 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2428 {
2429         u16 m;
2430
2431         if (methods == NULL) {
2432                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2433                 return -1;
2434         }
2435
2436         m = WPA_GET_BE16(methods);
2437
2438         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2439                    "%s%s%s%s%s%s%s%s%s", m,
2440                    m & WPS_CONFIG_USBA ? " [USBA]" : "",
2441                    m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2442                    m & WPS_CONFIG_LABEL ? " [Label]" : "",
2443                    m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2444                    m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2445                    m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2446                    m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2447                    m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2448                    m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2449
2450         if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2451                 /*
2452                  * The Enrollee does not have a display so it is unlikely to be
2453                  * able to show the passphrase to a user and as such, could
2454                  * benefit from receiving PSK to reduce key derivation time.
2455                  */
2456                 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2457                            "Enrollee not supporting display");
2458                 wps->use_psk_key = 1;
2459         }
2460
2461         return 0;
2462 }
2463
2464
2465 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2466 {
2467         if (state == NULL) {
2468                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2469                            "received");
2470                 return -1;
2471         }
2472
2473         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2474                    *state);
2475
2476         return 0;
2477 }
2478
2479
2480 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2481 {
2482         u16 a;
2483
2484         if (assoc == NULL) {
2485                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2486                 return -1;
2487         }
2488
2489         a = WPA_GET_BE16(assoc);
2490         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2491
2492         return 0;
2493 }
2494
2495
2496 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2497 {
2498         u16 e;
2499
2500         if (err == NULL) {
2501                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2502                 return -1;
2503         }
2504
2505         e = WPA_GET_BE16(err);
2506         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2507
2508         return 0;
2509 }
2510
2511
2512 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2513 {
2514 #ifdef CONFIG_P2P
2515         struct wps_registrar *reg = wps->wps->registrar;
2516
2517         if (is_zero_ether_addr(reg->p2p_dev_addr))
2518                 return 1; /* no filtering in use */
2519
2520         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2521                 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2522                            "filtering for PBC: expected " MACSTR " was "
2523                            MACSTR " - indicate PBC session overlap",
2524                            MAC2STR(reg->p2p_dev_addr),
2525                            MAC2STR(wps->p2p_dev_addr));
2526                 return 0;
2527         }
2528 #endif /* CONFIG_P2P */
2529         return 1;
2530 }
2531
2532
2533 static int wps_registrar_skip_overlap(struct wps_data *wps)
2534 {
2535 #ifdef CONFIG_P2P
2536         struct wps_registrar *reg = wps->wps->registrar;
2537
2538         if (is_zero_ether_addr(reg->p2p_dev_addr))
2539                 return 0; /* no specific Enrollee selected */
2540
2541         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2542                 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2543                            "Enrollee match");
2544                 return 1;
2545         }
2546 #endif /* CONFIG_P2P */
2547         return 0;
2548 }
2549
2550
2551 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2552                                            struct wps_parse_attr *attr)
2553 {
2554         wpa_printf(MSG_DEBUG, "WPS: Received M1");
2555
2556         if (wps->state != RECV_M1) {
2557                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2558                            "receiving M1", wps->state);
2559                 return WPS_FAILURE;
2560         }
2561
2562         if (wps_process_uuid_e(wps, attr->uuid_e) ||
2563             wps_process_mac_addr(wps, attr->mac_addr) ||
2564             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2565             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2566             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2567             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2568             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2569             wps_process_config_methods(wps, attr->config_methods) ||
2570             wps_process_wps_state(wps, attr->wps_state) ||
2571             wps_process_device_attrs(&wps->peer_dev, attr) ||
2572             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2573             wps_process_assoc_state(wps, attr->assoc_state) ||
2574             wps_process_dev_password_id(wps, attr->dev_password_id) ||
2575             wps_process_config_error(wps, attr->config_error) ||
2576             wps_process_os_version(&wps->peer_dev, attr->os_version))
2577                 return WPS_FAILURE;
2578
2579         if (wps->dev_pw_id < 0x10 &&
2580             wps->dev_pw_id != DEV_PW_DEFAULT &&
2581             wps->dev_pw_id != DEV_PW_P2PS_DEFAULT &&
2582             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2583             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2584             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2585 #ifdef CONFIG_WPS_NFC
2586             wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2587 #endif /* CONFIG_WPS_NFC */
2588             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2589              !wps->wps->registrar->pbc)) {
2590                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2591                            wps->dev_pw_id);
2592                 wps->state = SEND_M2D;
2593                 return WPS_CONTINUE;
2594         }
2595
2596 #ifdef CONFIG_WPS_NFC
2597         if (wps->dev_pw_id >= 0x10 ||
2598             wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2599                 struct wps_nfc_pw_token *token;
2600                 const u8 *addr[1];
2601                 u8 hash[WPS_HASH_LEN];
2602
2603                 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2604                            wps->dev_pw_id, wps->wps, wps->wps->registrar);
2605                 token = wps_get_nfc_pw_token(
2606                         &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2607                 if (token && token->peer_pk_hash_known) {
2608                         size_t len;
2609
2610                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2611                                    "Password Token");
2612                         dl_list_del(&token->list);
2613                         wps->nfc_pw_token = token;
2614
2615                         addr[0] = attr->public_key;
2616                         len = attr->public_key_len;
2617                         sha256_vector(1, addr, &len, hash);
2618                         if (os_memcmp_const(hash,
2619                                             wps->nfc_pw_token->pubkey_hash,
2620                                             WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2621                                 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2622                                            "mismatch");
2623                                 wps->state = SEND_M2D;
2624                                 wps->config_error =
2625                                         WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2626                                 return WPS_CONTINUE;
2627                         }
2628                 } else if (token) {
2629                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2630                                    "Password Token (no peer PK hash)");
2631                         wps->nfc_pw_token = token;
2632                 } else if (wps->dev_pw_id >= 0x10 &&
2633                            wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2634                            wps->wps->ap_nfc_dev_pw) {
2635                         wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2636                 }
2637         }
2638 #endif /* CONFIG_WPS_NFC */
2639
2640         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2641                 if ((wps->wps->registrar->force_pbc_overlap ||
2642                      wps_registrar_pbc_overlap(wps->wps->registrar,
2643                                                wps->mac_addr_e, wps->uuid_e) ||
2644                      !wps_registrar_p2p_dev_addr_match(wps)) &&
2645                     !wps_registrar_skip_overlap(wps)) {
2646                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2647                                    "negotiation");
2648                         wps->state = SEND_M2D;
2649                         wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2650                         wps_pbc_overlap_event(wps->wps);
2651                         wps_fail_event(wps->wps, WPS_M1,
2652                                        WPS_CFG_MULTIPLE_PBC_DETECTED,
2653                                        WPS_EI_NO_ERROR, wps->mac_addr_e);
2654                         wps->wps->registrar->force_pbc_overlap = 1;
2655                         return WPS_CONTINUE;
2656                 }
2657                 wps_registrar_add_pbc_session(wps->wps->registrar,
2658                                               wps->mac_addr_e, wps->uuid_e);
2659                 wps->pbc = 1;
2660         }
2661
2662 #ifdef WPS_WORKAROUNDS
2663         /*
2664          * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2665          * passphrase format. To avoid interop issues, force PSK format to be
2666          * used.
2667          */
2668         if (!wps->use_psk_key &&
2669             wps->peer_dev.manufacturer &&
2670             os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2671             wps->peer_dev.model_name &&
2672             os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2673                 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2674                            "PSK format");
2675                 wps->use_psk_key = 1;
2676         }
2677 #endif /* WPS_WORKAROUNDS */
2678
2679         wps->state = SEND_M2;
2680         return WPS_CONTINUE;
2681 }
2682
2683
2684 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2685                                            const struct wpabuf *msg,
2686                                            struct wps_parse_attr *attr)
2687 {
2688         wpa_printf(MSG_DEBUG, "WPS: Received M3");
2689
2690         if (wps->state != RECV_M3) {
2691                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2692                            "receiving M3", wps->state);
2693                 wps->state = SEND_WSC_NACK;
2694                 return WPS_CONTINUE;
2695         }
2696
2697         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2698             !wps_registrar_skip_overlap(wps)) {
2699                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2700                            "session overlap");
2701                 wps->state = SEND_WSC_NACK;
2702                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2703                 return WPS_CONTINUE;
2704         }
2705
2706         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2707             wps_process_authenticator(wps, attr->authenticator, msg) ||
2708             wps_process_e_hash1(wps, attr->e_hash1) ||
2709             wps_process_e_hash2(wps, attr->e_hash2)) {
2710                 wps->state = SEND_WSC_NACK;
2711                 return WPS_CONTINUE;
2712         }
2713
2714         wps->state = SEND_M4;
2715         return WPS_CONTINUE;
2716 }
2717
2718
2719 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2720                                            const struct wpabuf *msg,
2721                                            struct wps_parse_attr *attr)
2722 {
2723         struct wpabuf *decrypted;
2724         struct wps_parse_attr eattr;
2725
2726         wpa_printf(MSG_DEBUG, "WPS: Received M5");
2727
2728         if (wps->state != RECV_M5) {
2729                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2730                            "receiving M5", wps->state);
2731                 wps->state = SEND_WSC_NACK;
2732                 return WPS_CONTINUE;
2733         }
2734
2735         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2736             !wps_registrar_skip_overlap(wps)) {
2737                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2738                            "session overlap");
2739                 wps->state = SEND_WSC_NACK;
2740                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2741                 return WPS_CONTINUE;
2742         }
2743
2744         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2745             wps_process_authenticator(wps, attr->authenticator, msg)) {
2746                 wps->state = SEND_WSC_NACK;
2747                 return WPS_CONTINUE;
2748         }
2749
2750         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2751                                               attr->encr_settings_len);
2752         if (decrypted == NULL) {
2753                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2754                            "Settings attribute");
2755                 wps->state = SEND_WSC_NACK;
2756                 return WPS_CONTINUE;
2757         }
2758
2759         if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2760                 wpabuf_free(decrypted);
2761                 wps->state = SEND_WSC_NACK;
2762                 return WPS_CONTINUE;
2763         }
2764
2765         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2766                    "attribute");
2767         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2768             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2769             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2770                 wpabuf_free(decrypted);
2771                 wps->state = SEND_WSC_NACK;
2772                 return WPS_CONTINUE;
2773         }
2774         wpabuf_free(decrypted);
2775
2776         wps->state = SEND_M6;
2777         return WPS_CONTINUE;
2778 }
2779
2780
2781 static void wps_sta_cred_cb(struct wps_data *wps)
2782 {
2783         /*
2784          * Update credential to only include a single authentication and
2785          * encryption type in case the AP configuration includes more than one
2786          * option.
2787          */
2788         if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2789                 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2790         else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2791                 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2792         if (wps->cred.encr_type & WPS_ENCR_AES)
2793                 wps->cred.encr_type = WPS_ENCR_AES;
2794         else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2795                 wps->cred.encr_type = WPS_ENCR_TKIP;
2796         wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2797                    "AP configuration");
2798         if (wps->wps->cred_cb)
2799                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2800 }
2801
2802
2803 static void wps_cred_update(struct wps_credential *dst,
2804                             struct wps_credential *src)
2805 {
2806         os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2807         dst->ssid_len = src->ssid_len;
2808         dst->auth_type = src->auth_type;
2809         dst->encr_type = src->encr_type;
2810         dst->key_idx = src->key_idx;
2811         os_memcpy(dst->key, src->key, sizeof(dst->key));
2812         dst->key_len = src->key_len;
2813 }
2814
2815
2816 static int wps_process_ap_settings_r(struct wps_data *wps,
2817                                      struct wps_parse_attr *attr)
2818 {
2819         struct wpabuf *msg;
2820
2821         if (wps->wps->ap || wps->er)
2822                 return 0;
2823
2824         /* AP Settings Attributes in M7 when Enrollee is an AP */
2825         if (wps_process_ap_settings(attr, &wps->cred) < 0)
2826                 return -1;
2827
2828         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2829
2830         if (wps->new_ap_settings) {
2831                 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2832                            "new settings");
2833                 wps_cred_update(&wps->cred, wps->new_ap_settings);
2834                 return 0;
2835         } else {
2836                 /*
2837                  * Use the AP PIN only to receive the current AP settings, not
2838                  * to reconfigure the AP.
2839                  */
2840
2841                 /*
2842                  * Clear selected registrar here since we do not get to
2843                  * WSC_Done in this protocol run.
2844                  */
2845                 wps_registrar_pin_completed(wps->wps->registrar);
2846
2847                 msg = wps_build_ap_cred(wps);
2848                 if (msg == NULL)
2849                         return -1;
2850                 wps->cred.cred_attr = wpabuf_head(msg);
2851                 wps->cred.cred_attr_len = wpabuf_len(msg);
2852
2853                 if (wps->ap_settings_cb) {
2854                         wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2855                                             &wps->cred);
2856                         wpabuf_free(msg);
2857                         return 1;
2858                 }
2859                 wps_sta_cred_cb(wps);
2860
2861                 wps->cred.cred_attr = NULL;
2862                 wps->cred.cred_attr_len = 0;
2863                 wpabuf_free(msg);
2864
2865                 return 1;
2866         }
2867 }
2868
2869
2870 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2871                                            const struct wpabuf *msg,
2872                                            struct wps_parse_attr *attr)
2873 {
2874         struct wpabuf *decrypted;
2875         struct wps_parse_attr eattr;
2876
2877         wpa_printf(MSG_DEBUG, "WPS: Received M7");
2878
2879         if (wps->state != RECV_M7) {
2880                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2881                            "receiving M7", wps->state);
2882                 wps->state = SEND_WSC_NACK;
2883                 return WPS_CONTINUE;
2884         }
2885
2886         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2887             !wps_registrar_skip_overlap(wps)) {
2888                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2889                            "session overlap");
2890                 wps->state = SEND_WSC_NACK;
2891                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2892                 return WPS_CONTINUE;
2893         }
2894
2895         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2896             wps_process_authenticator(wps, attr->authenticator, msg)) {
2897                 wps->state = SEND_WSC_NACK;
2898                 return WPS_CONTINUE;
2899         }
2900
2901         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2902                                               attr->encr_settings_len);
2903         if (decrypted == NULL) {
2904                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2905                            "Settings attribute");
2906                 wps->state = SEND_WSC_NACK;
2907                 return WPS_CONTINUE;
2908         }
2909
2910         if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2911                                  attr->version2 != NULL) < 0) {
2912                 wpabuf_free(decrypted);
2913                 wps->state = SEND_WSC_NACK;
2914                 return WPS_CONTINUE;
2915         }
2916
2917         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2918                    "attribute");
2919         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2920             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2921             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2922             wps_process_ap_settings_r(wps, &eattr)) {
2923                 wpabuf_free(decrypted);
2924                 wps->state = SEND_WSC_NACK;
2925                 return WPS_CONTINUE;
2926         }
2927
2928         wpabuf_free(decrypted);
2929
2930         wps->state = SEND_M8;
2931         return WPS_CONTINUE;
2932 }
2933
2934
2935 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2936                                                 const struct wpabuf *msg)
2937 {
2938         struct wps_parse_attr attr;
2939         enum wps_process_res ret = WPS_CONTINUE;
2940
2941         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2942
2943         if (wps_parse_msg(msg, &attr) < 0)
2944                 return WPS_FAILURE;
2945
2946         if (attr.msg_type == NULL) {
2947                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2948                 wps->state = SEND_WSC_NACK;
2949                 return WPS_CONTINUE;
2950         }
2951
2952         if (*attr.msg_type != WPS_M1 &&
2953             (attr.registrar_nonce == NULL ||
2954              os_memcmp(wps->nonce_r, attr.registrar_nonce,
2955                        WPS_NONCE_LEN) != 0)) {
2956                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2957                 return WPS_FAILURE;
2958         }
2959
2960         switch (*attr.msg_type) {
2961         case WPS_M1:
2962                 if (wps_validate_m1(msg) < 0)
2963                         return WPS_FAILURE;
2964 #ifdef CONFIG_WPS_UPNP
2965                 if (wps->wps->wps_upnp && attr.mac_addr) {
2966                         /* Remove old pending messages when starting new run */
2967                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2968                         wps->wps->upnp_msgs = NULL;
2969
2970                         upnp_wps_device_send_wlan_event(
2971                                 wps->wps->wps_upnp, attr.mac_addr,
2972                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2973                 }
2974 #endif /* CONFIG_WPS_UPNP */
2975                 ret = wps_process_m1(wps, &attr);
2976                 break;
2977         case WPS_M3:
2978                 if (wps_validate_m3(msg) < 0)
2979                         return WPS_FAILURE;
2980                 ret = wps_process_m3(wps, msg, &attr);
2981                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2982                         wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2983                                        wps->error_indication, wps->mac_addr_e);
2984                 break;
2985         case WPS_M5:
2986                 if (wps_validate_m5(msg) < 0)
2987                         return WPS_FAILURE;
2988                 ret = wps_process_m5(wps, msg, &attr);
2989                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2990                         wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2991                                        wps->error_indication, wps->mac_addr_e);
2992                 break;
2993         case WPS_M7:
2994                 if (wps_validate_m7(msg) < 0)
2995                         return WPS_FAILURE;
2996                 ret = wps_process_m7(wps, msg, &attr);
2997                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2998                         wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2999                                        wps->error_indication, wps->mac_addr_e);
3000                 break;
3001         default:
3002                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
3003                            *attr.msg_type);
3004                 return WPS_FAILURE;
3005         }
3006
3007         if (ret == WPS_CONTINUE) {
3008                 /* Save a copy of the last message for Authenticator derivation
3009                  */
3010                 wpabuf_free(wps->last_msg);
3011                 wps->last_msg = wpabuf_dup(msg);
3012         }
3013
3014         return ret;
3015 }
3016
3017
3018 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
3019                                                 const struct wpabuf *msg)
3020 {
3021         struct wps_parse_attr attr;
3022
3023         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
3024
3025         if (wps_parse_msg(msg, &attr) < 0)
3026                 return WPS_FAILURE;
3027
3028         if (attr.msg_type == NULL) {
3029                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3030                 return WPS_FAILURE;
3031         }
3032
3033         if (*attr.msg_type != WPS_WSC_ACK) {
3034                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3035                            *attr.msg_type);
3036                 return WPS_FAILURE;
3037         }
3038
3039 #ifdef CONFIG_WPS_UPNP
3040         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3041             upnp_wps_subscribers(wps->wps->wps_upnp)) {
3042                 if (wps->wps->upnp_msgs)
3043                         return WPS_CONTINUE;
3044                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3045                            "external Registrar");
3046                 return WPS_PENDING;
3047         }
3048 #endif /* CONFIG_WPS_UPNP */
3049
3050         if (attr.registrar_nonce == NULL ||
3051             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3052         {
3053                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3054                 return WPS_FAILURE;
3055         }
3056
3057         if (attr.enrollee_nonce == NULL ||
3058             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3059                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3060                 return WPS_FAILURE;
3061         }
3062
3063         if (wps->state == RECV_M2D_ACK) {
3064 #ifdef CONFIG_WPS_UPNP
3065                 if (wps->wps->wps_upnp &&
3066                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
3067                         if (wps->wps->upnp_msgs)
3068                                 return WPS_CONTINUE;
3069                         if (wps->ext_reg == 0)
3070                                 wps->ext_reg = 1;
3071                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3072                                    "external Registrar");
3073                         return WPS_PENDING;
3074                 }
3075 #endif /* CONFIG_WPS_UPNP */
3076
3077                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3078                            "terminate negotiation");
3079         }
3080
3081         return WPS_FAILURE;
3082 }
3083
3084
3085 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3086                                                  const struct wpabuf *msg)
3087 {
3088         struct wps_parse_attr attr;
3089         int old_state;
3090         u16 config_error;
3091
3092         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3093
3094         old_state = wps->state;
3095         wps->state = SEND_WSC_NACK;
3096
3097         if (wps_parse_msg(msg, &attr) < 0)
3098                 return WPS_FAILURE;
3099
3100         if (attr.msg_type == NULL) {
3101                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3102                 return WPS_FAILURE;
3103         }
3104
3105         if (*attr.msg_type != WPS_WSC_NACK) {
3106                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3107                            *attr.msg_type);
3108                 return WPS_FAILURE;
3109         }
3110
3111 #ifdef CONFIG_WPS_UPNP
3112         if (wps->wps->wps_upnp && wps->ext_reg) {
3113                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3114                            "Registrar terminated by the Enrollee");
3115                 return WPS_FAILURE;
3116         }
3117 #endif /* CONFIG_WPS_UPNP */
3118
3119         if (attr.registrar_nonce == NULL ||
3120             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3121         {
3122                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3123                 return WPS_FAILURE;
3124         }
3125
3126         if (attr.enrollee_nonce == NULL ||
3127             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3128                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3129                 return WPS_FAILURE;
3130         }
3131
3132         if (attr.config_error == NULL) {
3133                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3134                            "in WSC_NACK");
3135                 return WPS_FAILURE;
3136         }
3137
3138         config_error = WPA_GET_BE16(attr.config_error);
3139         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3140                    "Configuration Error %d", config_error);
3141
3142         switch (old_state) {
3143         case RECV_M3:
3144                 wps_fail_event(wps->wps, WPS_M2, config_error,
3145                                wps->error_indication, wps->mac_addr_e);
3146                 break;
3147         case RECV_M5:
3148                 wps_fail_event(wps->wps, WPS_M4, config_error,
3149                                wps->error_indication, wps->mac_addr_e);
3150                 break;
3151         case RECV_M7:
3152                 wps_fail_event(wps->wps, WPS_M6, config_error,
3153                                wps->error_indication, wps->mac_addr_e);
3154                 break;
3155         case RECV_DONE:
3156                 wps_fail_event(wps->wps, WPS_M8, config_error,
3157                                wps->error_indication, wps->mac_addr_e);
3158                 break;
3159         default:
3160                 break;
3161         }
3162
3163         return WPS_FAILURE;
3164 }
3165
3166
3167 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3168                                                  const struct wpabuf *msg)
3169 {
3170         struct wps_parse_attr attr;
3171
3172         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3173
3174         if (wps->state != RECV_DONE &&
3175             (!wps->wps->wps_upnp || !wps->ext_reg)) {
3176                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3177                            "receiving WSC_Done", wps->state);
3178                 return WPS_FAILURE;
3179         }
3180
3181         if (wps_parse_msg(msg, &attr) < 0)
3182                 return WPS_FAILURE;
3183
3184         if (attr.msg_type == NULL) {
3185                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3186                 return WPS_FAILURE;
3187         }
3188
3189         if (*attr.msg_type != WPS_WSC_DONE) {
3190                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3191                            *attr.msg_type);
3192                 return WPS_FAILURE;
3193         }
3194
3195 #ifdef CONFIG_WPS_UPNP
3196         if (wps->wps->wps_upnp && wps->ext_reg) {
3197                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3198                            "Registrar completed successfully");
3199                 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3200                                  wps->uuid_e);
3201                 return WPS_DONE;
3202         }
3203 #endif /* CONFIG_WPS_UPNP */
3204
3205         if (attr.registrar_nonce == NULL ||
3206             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3207         {
3208                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3209                 return WPS_FAILURE;
3210         }
3211
3212         if (attr.enrollee_nonce == NULL ||
3213             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3214                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3215                 return WPS_FAILURE;
3216         }
3217
3218         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3219         wps_device_store(wps->wps->registrar, &wps->peer_dev,
3220                          wps->uuid_e);
3221
3222         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3223             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3224                 struct wps_credential cred;
3225
3226                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3227                            "on first Enrollee connection");
3228
3229                 os_memset(&cred, 0, sizeof(cred));
3230                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3231                 cred.ssid_len = wps->wps->ssid_len;
3232                 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) {
3233                         cred.auth_type = WPS_AUTH_WPA2PSK;
3234                         cred.encr_type = WPS_ENCR_AES;
3235                 } else {
3236                         cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3237                         cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3238                 }
3239                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3240                 cred.key_len = wps->new_psk_len;
3241
3242                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3243                 wpa_hexdump_ascii_key(MSG_DEBUG,
3244                                       "WPS: Generated random passphrase",
3245                                       wps->new_psk, wps->new_psk_len);
3246                 if (wps->wps->cred_cb)
3247                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3248
3249                 os_free(wps->new_psk);
3250                 wps->new_psk = NULL;
3251         }
3252
3253         if (!wps->wps->ap && !wps->er)
3254                 wps_sta_cred_cb(wps);
3255
3256         if (wps->new_psk) {
3257                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3258                                    wps->p2p_dev_addr, wps->new_psk,
3259                                    wps->new_psk_len)) {
3260                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3261                                    "new PSK");
3262                 }
3263                 os_free(wps->new_psk);
3264                 wps->new_psk = NULL;
3265         }
3266
3267         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3268                            wps->dev_password, wps->dev_password_len);
3269
3270         if (wps->pbc) {
3271                 wps_registrar_remove_pbc_session(wps->wps->registrar,
3272                                                  wps->uuid_e,
3273                                                  wps->p2p_dev_addr);
3274                 wps_registrar_pbc_completed(wps->wps->registrar);
3275 #ifdef WPS_WORKAROUNDS
3276                 os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3277 #endif /* WPS_WORKAROUNDS */
3278                 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3279                           WPS_UUID_LEN);
3280         } else {
3281                 wps_registrar_pin_completed(wps->wps->registrar);
3282         }
3283         /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3284          * merge them into APs own list.. */
3285
3286         wps_success_event(wps->wps, wps->mac_addr_e);
3287
3288         return WPS_DONE;
3289 }
3290
3291
3292 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3293                                                enum wsc_op_code op_code,
3294                                                const struct wpabuf *msg)
3295 {
3296         enum wps_process_res ret;
3297
3298         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3299                    "op_code=%d)",
3300                    (unsigned long) wpabuf_len(msg), op_code);
3301
3302 #ifdef CONFIG_WPS_UPNP
3303         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3304                 struct wps_parse_attr attr;
3305                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3306                     *attr.msg_type == WPS_M3)
3307                         wps->ext_reg = 2; /* past M2/M2D phase */
3308         }
3309         if (wps->ext_reg > 1)
3310                 wps_registrar_free_pending_m2(wps->wps);
3311         if (wps->wps->wps_upnp && wps->ext_reg &&
3312             wps->wps->upnp_msgs == NULL &&
3313             (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3314         {
3315                 struct wps_parse_attr attr;
3316                 int type;
3317                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3318                         type = -1;
3319                 else
3320                         type = *attr.msg_type;
3321                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3322                            " to external Registrar for processing", type);
3323                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3324                                                 wps->mac_addr_e,
3325                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
3326                                                 msg);
3327                 if (op_code == WSC_MSG)
3328                         return WPS_PENDING;
3329         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3330                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3331                            "external Registrar");
3332                 return WPS_CONTINUE;
3333         }
3334 #endif /* CONFIG_WPS_UPNP */
3335
3336         switch (op_code) {
3337         case WSC_MSG:
3338                 return wps_process_wsc_msg(wps, msg);
3339         case WSC_ACK:
3340                 if (wps_validate_wsc_ack(msg) < 0)
3341                         return WPS_FAILURE;
3342                 return wps_process_wsc_ack(wps, msg);
3343         case WSC_NACK:
3344                 if (wps_validate_wsc_nack(msg) < 0)
3345                         return WPS_FAILURE;
3346                 return wps_process_wsc_nack(wps, msg);
3347         case WSC_Done:
3348                 if (wps_validate_wsc_done(msg) < 0)
3349                         return WPS_FAILURE;
3350                 ret = wps_process_wsc_done(wps, msg);
3351                 if (ret == WPS_FAILURE) {
3352                         wps->state = SEND_WSC_NACK;
3353                         wps_fail_event(wps->wps, WPS_WSC_DONE,
3354                                        wps->config_error,
3355                                        wps->error_indication, wps->mac_addr_e);
3356                 }
3357                 return ret;
3358         default:
3359                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3360                 return WPS_FAILURE;
3361         }
3362 }
3363
3364
3365 int wps_registrar_update_ie(struct wps_registrar *reg)
3366 {
3367         return wps_set_ie(reg);
3368 }
3369
3370
3371 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3372                                                void *timeout_ctx)
3373 {
3374         struct wps_registrar *reg = eloop_ctx;
3375
3376         wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3377                    "unselect internal Registrar");
3378         reg->selected_registrar = 0;
3379         reg->pbc = 0;
3380         wps_registrar_selected_registrar_changed(reg, 0);
3381 }
3382
3383
3384 #ifdef CONFIG_WPS_UPNP
3385 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3386                                       struct subscription *s)
3387 {
3388         int i, j;
3389         wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3390                    "config_methods=0x%x)",
3391                    s->dev_password_id, s->config_methods);
3392         reg->sel_reg_union = 1;
3393         if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3394                 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3395         if (reg->sel_reg_config_methods_override == -1)
3396                 reg->sel_reg_config_methods_override = 0;
3397         reg->sel_reg_config_methods_override |= s->config_methods;
3398         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3399                 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3400                         break;
3401         for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3402              j++) {
3403                 if (is_zero_ether_addr(s->authorized_macs[j]))
3404                         break;
3405                 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3406                            MACSTR, MAC2STR(s->authorized_macs[j]));
3407                 os_memcpy(reg->authorized_macs_union[i],
3408                           s->authorized_macs[j], ETH_ALEN);
3409                 i++;
3410         }
3411         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3412                     (u8 *) reg->authorized_macs_union,
3413                     sizeof(reg->authorized_macs_union));
3414 }
3415 #endif /* CONFIG_WPS_UPNP */
3416
3417
3418 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3419 {
3420 #ifdef CONFIG_WPS_UPNP
3421         struct subscription *s;
3422
3423         if (reg->wps->wps_upnp == NULL)
3424                 return;
3425
3426         dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3427                          struct subscription, list) {
3428                 struct subscr_addr *sa;
3429                 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3430                 if (sa) {
3431                         wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3432                                    inet_ntoa(sa->saddr.sin_addr),
3433                                    ntohs(sa->saddr.sin_port));
3434                 }
3435                 if (s->selected_registrar)
3436                         wps_registrar_sel_reg_add(reg, s);
3437                 else
3438                         wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3439                                    "selected");
3440         }
3441 #endif /* CONFIG_WPS_UPNP */
3442 }
3443
3444
3445 /**
3446  * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3447  * @reg: Registrar data from wps_registrar_init()
3448  *
3449  * This function is called when selected registrar state changes, e.g., when an
3450  * AP receives a SetSelectedRegistrar UPnP message.
3451  */
3452 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3453                                               u16 dev_pw_id)
3454 {
3455         wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3456
3457         reg->sel_reg_union = reg->selected_registrar;
3458         reg->sel_reg_dev_password_id_override = -1;
3459         reg->sel_reg_config_methods_override = -1;
3460         os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3461                   WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3462         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3463                     (u8 *) reg->authorized_macs_union,
3464                     sizeof(reg->authorized_macs_union));
3465         if (reg->selected_registrar) {
3466                 u16 methods;
3467
3468                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3469                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3470                              WPS_CONFIG_PHY_PUSHBUTTON);
3471                 if (reg->pbc) {
3472                         reg->sel_reg_dev_password_id_override =
3473                                 DEV_PW_PUSHBUTTON;
3474                         wps_set_pushbutton(&methods, reg->wps->config_methods);
3475                 } else if (dev_pw_id)
3476                         reg->sel_reg_dev_password_id_override = dev_pw_id;
3477                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3478                            "(pbc=%d)", reg->pbc);
3479                 reg->sel_reg_config_methods_override = methods;
3480         } else
3481                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3482
3483         wps_registrar_sel_reg_union(reg);
3484
3485         wps_set_ie(reg);
3486         wps_cb_set_sel_reg(reg);
3487 }
3488
3489
3490 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3491                            char *buf, size_t buflen)
3492 {
3493         struct wps_registrar_device *d;
3494         int len = 0, ret;
3495         char uuid[40];
3496         char devtype[WPS_DEV_TYPE_BUFSIZE];
3497
3498         d = wps_device_get(reg, addr);
3499         if (d == NULL)
3500                 return 0;
3501         if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3502                 return 0;
3503
3504         ret = os_snprintf(buf + len, buflen - len,
3505                           "wpsUuid=%s\n"
3506                           "wpsPrimaryDeviceType=%s\n"
3507                           "wpsDeviceName=%s\n"
3508                           "wpsManufacturer=%s\n"
3509                           "wpsModelName=%s\n"
3510                           "wpsModelNumber=%s\n"
3511                           "wpsSerialNumber=%s\n",
3512                           uuid,
3513                           wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3514                                                sizeof(devtype)),
3515                           d->dev.device_name ? d->dev.device_name : "",
3516                           d->dev.manufacturer ? d->dev.manufacturer : "",
3517                           d->dev.model_name ? d->dev.model_name : "",
3518                           d->dev.model_number ? d->dev.model_number : "",
3519                           d->dev.serial_number ? d->dev.serial_number : "");
3520         if (os_snprintf_error(buflen - len, ret))
3521                 return len;
3522         len += ret;
3523
3524         return len;
3525 }
3526
3527
3528 int wps_registrar_config_ap(struct wps_registrar *reg,
3529                             struct wps_credential *cred)
3530 {
3531         wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3532         if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3533                                  WPS_ENCR_AES))) {
3534                 if (cred->encr_type & WPS_ENCR_WEP) {
3535                         wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3536                                    "due to WEP configuration");
3537                         return -1;
3538                 }
3539
3540                 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3541                            "invalid encr_type 0x%x", cred->encr_type);
3542                 return -1;
3543         }
3544
3545         if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3546             WPS_ENCR_TKIP) {
3547                 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3548                            "TKIP+AES");
3549                 cred->encr_type |= WPS_ENCR_AES;
3550         }
3551
3552         if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3553             WPS_AUTH_WPAPSK) {
3554                 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3555                            "WPAPSK+WPA2PSK");
3556                 cred->auth_type |= WPS_AUTH_WPA2PSK;
3557         }
3558
3559         if (reg->wps->cred_cb)
3560                 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3561
3562         return -1;
3563 }
3564
3565
3566 #ifdef CONFIG_WPS_NFC
3567
3568 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3569                                    const u8 *pubkey_hash, u16 pw_id,
3570                                    const u8 *dev_pw, size_t dev_pw_len,
3571                                    int pk_hash_provided_oob)
3572 {
3573         struct wps_nfc_pw_token *token;
3574
3575         if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3576                 return -1;
3577
3578         if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3579             (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3580                 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3581                            "addition - missing public key hash");
3582                 return -1;
3583         }
3584
3585         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, pw_id);
3586
3587         token = os_zalloc(sizeof(*token));
3588         if (token == NULL)
3589                 return -1;
3590
3591         token->peer_pk_hash_known = pubkey_hash != NULL;
3592         if (pubkey_hash)
3593                 os_memcpy(token->pubkey_hash, pubkey_hash,
3594                           WPS_OOB_PUBKEY_HASH_LEN);
3595         token->pw_id = pw_id;
3596         token->pk_hash_provided_oob = pk_hash_provided_oob;
3597         if (dev_pw) {
3598                 wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3599                                            sizeof(token->dev_pw),
3600                                            dev_pw, dev_pw_len);
3601                 token->dev_pw_len = dev_pw_len * 2;
3602         }
3603
3604         dl_list_add(&reg->nfc_pw_tokens, &token->list);
3605
3606         reg->selected_registrar = 1;
3607         reg->pbc = 0;
3608         wps_registrar_add_authorized_mac(reg,
3609                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
3610         wps_registrar_selected_registrar_changed(reg, pw_id);
3611         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3612         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3613                                wps_registrar_set_selected_timeout,
3614                                reg, NULL);
3615
3616         wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3617                    pw_id);
3618
3619         return 0;
3620 }
3621
3622
3623 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3624                                          const u8 *oob_dev_pw,
3625                                          size_t oob_dev_pw_len)
3626 {
3627         const u8 *pos, *hash, *dev_pw;
3628         u16 id;
3629         size_t dev_pw_len;
3630
3631         if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3632             oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3633             WPS_OOB_DEVICE_PASSWORD_LEN)
3634                 return -1;
3635
3636         hash = oob_dev_pw;
3637         pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3638         id = WPA_GET_BE16(pos);
3639         dev_pw = pos + 2;
3640         dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3641
3642         wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3643                    id);
3644
3645         wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3646                     hash, WPS_OOB_PUBKEY_HASH_LEN);
3647         wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3648
3649         return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3650                                               dev_pw_len, 0);
3651 }
3652
3653
3654 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3655                                        struct wps_nfc_pw_token *token)
3656 {
3657         wps_registrar_remove_authorized_mac(reg,
3658                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
3659         wps_registrar_selected_registrar_changed(reg, 0);
3660
3661         /*
3662          * Free the NFC password token if it was used only for a single protocol
3663          * run. The static handover case uses the same password token multiple
3664          * times, so do not free that case here.
3665          */
3666         if (token->peer_pk_hash_known)
3667                 os_free(token);
3668 }
3669
3670 #endif /* CONFIG_WPS_NFC */