contrib/hostapd/src/wps/wps_registrar.c

   1 /*
   2  * Wi-Fi Protected Setup - Registrar
   3  * Copyright (c) 2008-2013, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/base64.h"
  13 #include "utils/eloop.h"
  14 #include "utils/uuid.h"
  15 #include "utils/list.h"
  16 #include "crypto/crypto.h"
  17 #include "crypto/sha256.h"
  18 #include "crypto/random.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "wps_i.h"
  21 #include "wps_dev_attr.h"
  22 #include "wps_upnp.h"
  23 #include "wps_upnp_i.h"
  24
  25 #ifndef CONFIG_WPS_STRICT
  26 #define WPS_WORKAROUNDS
  27 #endif /* CONFIG_WPS_STRICT */
  28
  29 #ifdef CONFIG_WPS_NFC
  30
  31 struct wps_nfc_pw_token {
  32         struct dl_list list;
  33         u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
  34         unsigned int peer_pk_hash_known:1;
  35         u16 pw_id;
  36         u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1];
  37         size_t dev_pw_len;
  38         int pk_hash_provided_oob; /* whether own PK hash was provided OOB */
  39 };
  40
  41
  42 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
  43 {
  44         dl_list_del(&token->list);
  45         os_free(token);
  46 }
  47
  48
  49 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
  50 {
  51         struct wps_nfc_pw_token *token, *prev;
  52         dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
  53                               list) {
  54                 if (pw_id == 0 || pw_id == token->pw_id)
  55                         wps_remove_nfc_pw_token(token);
  56         }
  57 }
  58
  59
  60 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
  61                                                       u16 pw_id)
  62 {
  63         struct wps_nfc_pw_token *token;
  64         dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
  65                 if (pw_id == token->pw_id)
  66                         return token;
  67         }
  68         return NULL;
  69 }
  70
  71 #else /* CONFIG_WPS_NFC */
  72
  73 #define wps_free_nfc_pw_tokens(t, p) do { } while (0)
  74
  75 #endif /* CONFIG_WPS_NFC */
  76
  77
  78 struct wps_uuid_pin {
  79         struct dl_list list;
  80         u8 uuid[WPS_UUID_LEN];
  81         int wildcard_uuid;
  82         u8 *pin;
  83         size_t pin_len;
  84 #define PIN_LOCKED BIT(0)
  85 #define PIN_EXPIRES BIT(1)
  86         int flags;
  87         struct os_reltime expiration;
  88         u8 enrollee_addr[ETH_ALEN];
  89 };
  90
  91
  92 static void wps_free_pin(struct wps_uuid_pin *pin)
  93 {
  94         os_free(pin->pin);
  95         os_free(pin);
  96 }
  97
  98
  99 static void wps_remove_pin(struct wps_uuid_pin *pin)
 100 {
 101         dl_list_del(&pin->list);
 102         wps_free_pin(pin);
 103 }
 104
 105
 106 static void wps_free_pins(struct dl_list *pins)
 107 {
 108         struct wps_uuid_pin *pin, *prev;
 109         dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
 110                 wps_remove_pin(pin);
 111 }
 112
 113
 114 struct wps_pbc_session {
 115         struct wps_pbc_session *next;
 116         u8 addr[ETH_ALEN];
 117         u8 uuid_e[WPS_UUID_LEN];
 118         struct os_reltime timestamp;
 119 };
 120
 121
 122 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
 123 {
 124         struct wps_pbc_session *prev;
 125
 126         while (pbc) {
 127                 prev = pbc;
 128                 pbc = pbc->next;
 129                 os_free(prev);
 130         }
 131 }
 132
 133
 134 struct wps_registrar_device {
 135         struct wps_registrar_device *next;
 136         struct wps_device_data dev;
 137         u8 uuid[WPS_UUID_LEN];
 138 };
 139
 140
 141 struct wps_registrar {
 142         struct wps_context *wps;
 143
 144         int pbc;
 145         int selected_registrar;
 146
 147         int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr,
 148                           const u8 *psk, size_t psk_len);
 149         int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
 150                          struct wpabuf *probe_resp_ie);
 151         void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
 152                               const struct wps_device_data *dev);
 153         void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
 154                                const u8 *uuid_e, const u8 *dev_pw,
 155                                size_t dev_pw_len);
 156         void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
 157                                u16 sel_reg_config_methods);
 158         void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
 159                                  const u8 *pri_dev_type, u16 config_methods,
 160                                  u16 dev_password_id, u8 request_type,
 161                                  const char *dev_name);
 162         void *cb_ctx;
 163
 164         struct dl_list pins;
 165         struct dl_list nfc_pw_tokens;
 166         struct wps_pbc_session *pbc_sessions;
 167
 168         int skip_cred_build;
 169         struct wpabuf *extra_cred;
 170         int disable_auto_conf;
 171         int sel_reg_union;
 172         int sel_reg_dev_password_id_override;
 173         int sel_reg_config_methods_override;
 174         int static_wep_only;
 175         int dualband;
 176         int force_per_enrollee_psk;
 177
 178         struct wps_registrar_device *devices;
 179
 180         int force_pbc_overlap;
 181
 182         u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 183         u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
 184
 185         u8 p2p_dev_addr[ETH_ALEN];
 186
 187         u8 pbc_ignore_uuid[WPS_UUID_LEN];
 188 #ifdef WPS_WORKAROUNDS
 189         struct os_reltime pbc_ignore_start;
 190 #endif /* WPS_WORKAROUNDS */
 191 };
 192
 193
 194 static int wps_set_ie(struct wps_registrar *reg);
 195 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
 196 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
 197                                                void *timeout_ctx);
 198 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 199                                      struct wps_uuid_pin *pin);
 200
 201
 202 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
 203                                              const u8 *addr)
 204 {
 205         int i;
 206         wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
 207                    MAC2STR(addr));
 208         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
 209                 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
 210                         wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
 211                                    "already in the list");
 212                         return; /* already in list */
 213                 }
 214         for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
 215                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
 216                           ETH_ALEN);
 217         os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
 218         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 219                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 220 }
 221
 222
 223 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
 224                                                 const u8 *addr)
 225 {
 226         int i;
 227         wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
 228                    MAC2STR(addr));
 229         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
 230                 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
 231                         break;
 232         }
 233         if (i == WPS_MAX_AUTHORIZED_MACS) {
 234                 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
 235                            "list");
 236                 return; /* not in the list */
 237         }
 238         for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
 239                 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
 240                           ETH_ALEN);
 241         os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
 242                   ETH_ALEN);
 243         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
 244                     (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
 245 }
 246
 247
 248 static void wps_free_devices(struct wps_registrar_device *dev)
 249 {
 250         struct wps_registrar_device *prev;
 251
 252         while (dev) {
 253                 prev = dev;
 254                 dev = dev->next;
 255                 wps_device_data_free(&prev->dev);
 256                 os_free(prev);
 257         }
 258 }
 259
 260
 261 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
 262                                                     const u8 *addr)
 263 {
 264         struct wps_registrar_device *dev;
 265
 266         for (dev = reg->devices; dev; dev = dev->next) {
 267                 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
 268                         return dev;
 269         }
 270         return NULL;
 271 }
 272
 273
 274 static void wps_device_clone_data(struct wps_device_data *dst,
 275                                   struct wps_device_data *src)
 276 {
 277         os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
 278         os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
 279
 280 #define WPS_STRDUP(n) \
 281         os_free(dst->n); \
 282         dst->n = src->n ? os_strdup(src->n) : NULL
 283
 284         WPS_STRDUP(device_name);
 285         WPS_STRDUP(manufacturer);
 286         WPS_STRDUP(model_name);
 287         WPS_STRDUP(model_number);
 288         WPS_STRDUP(serial_number);
 289 #undef WPS_STRDUP
 290 }
 291
 292
 293 int wps_device_store(struct wps_registrar *reg,
 294                      struct wps_device_data *dev, const u8 *uuid)
 295 {
 296         struct wps_registrar_device *d;
 297
 298         d = wps_device_get(reg, dev->mac_addr);
 299         if (d == NULL) {
 300                 d = os_zalloc(sizeof(*d));
 301                 if (d == NULL)
 302                         return -1;
 303                 d->next = reg->devices;
 304                 reg->devices = d;
 305         }
 306
 307         wps_device_clone_data(&d->dev, dev);
 308         os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
 309
 310         return 0;
 311 }
 312
 313
 314 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
 315                                           const u8 *addr, const u8 *uuid_e)
 316 {
 317         struct wps_pbc_session *pbc, *prev = NULL;
 318         struct os_reltime now;
 319
 320         os_get_reltime(&now);
 321
 322         pbc = reg->pbc_sessions;
 323         while (pbc) {
 324                 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
 325                     os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
 326                         if (prev)
 327                                 prev->next = pbc->next;
 328                         else
 329                                 reg->pbc_sessions = pbc->next;
 330                         break;
 331                 }
 332                 prev = pbc;
 333                 pbc = pbc->next;
 334         }
 335
 336         if (!pbc) {
 337                 pbc = os_zalloc(sizeof(*pbc));
 338                 if (pbc == NULL)
 339                         return;
 340                 os_memcpy(pbc->addr, addr, ETH_ALEN);
 341                 if (uuid_e)
 342                         os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
 343         }
 344
 345         pbc->next = reg->pbc_sessions;
 346         reg->pbc_sessions = pbc;
 347         pbc->timestamp = now;
 348
 349         /* remove entries that have timed out */
 350         prev = pbc;
 351         pbc = pbc->next;
 352
 353         while (pbc) {
 354                 if (os_reltime_expired(&now, &pbc->timestamp,
 355                                        WPS_PBC_WALK_TIME)) {
 356                         prev->next = NULL;
 357                         wps_free_pbc_sessions(pbc);
 358                         break;
 359                 }
 360                 prev = pbc;
 361                 pbc = pbc->next;
 362         }
 363 }
 364
 365
 366 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
 367                                              const u8 *uuid_e,
 368                                              const u8 *p2p_dev_addr)
 369 {
 370         struct wps_pbc_session *pbc, *prev = NULL, *tmp;
 371
 372         pbc = reg->pbc_sessions;
 373         while (pbc) {
 374                 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
 375                     (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
 376                      os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
 377                      0)) {
 378                         if (prev)
 379                                 prev->next = pbc->next;
 380                         else
 381                                 reg->pbc_sessions = pbc->next;
 382                         tmp = pbc;
 383                         pbc = pbc->next;
 384                         wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
 385                                    "addr=" MACSTR, MAC2STR(tmp->addr));
 386                         wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
 387                                     tmp->uuid_e, WPS_UUID_LEN);
 388                         os_free(tmp);
 389                         continue;
 390                 }
 391                 prev = pbc;
 392                 pbc = pbc->next;
 393         }
 394 }
 395
 396
 397 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
 398                               const u8 *addr, const u8 *uuid_e)
 399 {
 400         int count = 0;
 401         struct wps_pbc_session *pbc;
 402         struct wps_pbc_session *first = NULL;
 403         struct os_reltime now;
 404
 405         os_get_reltime(&now);
 406
 407         wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
 408
 409         if (uuid_e) {
 410                 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
 411                 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
 412                             uuid_e, WPS_UUID_LEN);
 413                 count++;
 414         }
 415
 416         for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
 417                 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
 418                            MAC2STR(pbc->addr));
 419                 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
 420                             pbc->uuid_e, WPS_UUID_LEN);
 421                 if (os_reltime_expired(&now, &pbc->timestamp,
 422                                        WPS_PBC_WALK_TIME)) {
 423                         wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired");
 424                         break;
 425                 }
 426                 if (first &&
 427                     os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
 428                         wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
 429                         continue; /* same Enrollee */
 430                 }
 431                 if (uuid_e == NULL ||
 432                     os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
 433                         wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
 434                         count++;
 435                 }
 436                 if (first == NULL)
 437                         first = pbc;
 438         }
 439
 440         wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
 441
 442         return count > 1 ? 1 : 0;
 443 }
 444
 445
 446 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
 447 {
 448         wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
 449                    wps->wps_state);
 450         wpabuf_put_be16(msg, ATTR_WPS_STATE);
 451         wpabuf_put_be16(msg, 1);
 452         wpabuf_put_u8(msg, wps->wps_state);
 453         return 0;
 454 }
 455
 456
 457 #ifdef CONFIG_WPS_UPNP
 458 static void wps_registrar_free_pending_m2(struct wps_context *wps)
 459 {
 460         struct upnp_pending_message *p, *p2, *prev = NULL;
 461         p = wps->upnp_msgs;
 462         while (p) {
 463                 if (p->type == WPS_M2 || p->type == WPS_M2D) {
 464                         if (prev == NULL)
 465                                 wps->upnp_msgs = p->next;
 466                         else
 467                                 prev->next = p->next;
 468                         wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
 469                         p2 = p;
 470                         p = p->next;
 471                         wpabuf_free(p2->msg);
 472                         os_free(p2);
 473                         continue;
 474                 }
 475                 prev = p;
 476                 p = p->next;
 477         }
 478 }
 479 #endif /* CONFIG_WPS_UPNP */
 480
 481
 482 static int wps_build_ap_setup_locked(struct wps_context *wps,
 483                                      struct wpabuf *msg)
 484 {
 485         if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
 486                 wpa_printf(MSG_DEBUG, "WPS:  * AP Setup Locked");
 487                 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
 488                 wpabuf_put_be16(msg, 1);
 489                 wpabuf_put_u8(msg, 1);
 490         }
 491         return 0;
 492 }
 493
 494
 495 static int wps_build_selected_registrar(struct wps_registrar *reg,
 496                                         struct wpabuf *msg)
 497 {
 498         if (!reg->sel_reg_union)
 499                 return 0;
 500         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar");
 501         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
 502         wpabuf_put_be16(msg, 1);
 503         wpabuf_put_u8(msg, 1);
 504         return 0;
 505 }
 506
 507
 508 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
 509                                              struct wpabuf *msg)
 510 {
 511         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 512         if (!reg->sel_reg_union)
 513                 return 0;
 514         if (reg->sel_reg_dev_password_id_override >= 0)
 515                 id = reg->sel_reg_dev_password_id_override;
 516         wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
 517         wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
 518         wpabuf_put_be16(msg, 2);
 519         wpabuf_put_be16(msg, id);
 520         return 0;
 521 }
 522
 523
 524 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
 525                                         struct wpabuf *msg)
 526 {
 527         u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
 528         if (!reg->sel_reg_union)
 529                 return 0;
 530         if (reg->sel_reg_dev_password_id_override >= 0)
 531                 id = reg->sel_reg_dev_password_id_override;
 532         if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
 533                 return 0;
 534         return wps_build_uuid_e(msg, reg->wps->uuid);
 535 }
 536
 537
 538 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
 539 {
 540         *methods |= WPS_CONFIG_PUSHBUTTON;
 541 #ifdef CONFIG_WPS2
 542         if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
 543             WPS_CONFIG_VIRT_PUSHBUTTON)
 544                 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
 545         if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
 546             WPS_CONFIG_PHY_PUSHBUTTON)
 547                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 548         if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
 549             WPS_CONFIG_VIRT_PUSHBUTTON &&
 550             (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
 551             WPS_CONFIG_PHY_PUSHBUTTON) {
 552                 /*
 553                  * Required to include virtual/physical flag, but we were not
 554                  * configured with push button type, so have to default to one
 555                  * of them.
 556                  */
 557                 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
 558         }
 559 #endif /* CONFIG_WPS2 */
 560 }
 561
 562
 563 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
 564                                             struct wpabuf *msg)
 565 {
 566         u16 methods;
 567         if (!reg->sel_reg_union)
 568                 return 0;
 569         methods = reg->wps->config_methods;
 570         methods &= ~WPS_CONFIG_PUSHBUTTON;
 571 #ifdef CONFIG_WPS2
 572         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 573                      WPS_CONFIG_PHY_PUSHBUTTON);
 574 #endif /* CONFIG_WPS2 */
 575         if (reg->pbc)
 576                 wps_set_pushbutton(&methods, reg->wps->config_methods);
 577         if (reg->sel_reg_config_methods_override >= 0)
 578                 methods = reg->sel_reg_config_methods_override;
 579         wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar Config Methods (%x)",
 580                    methods);
 581         wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
 582         wpabuf_put_be16(msg, 2);
 583         wpabuf_put_be16(msg, methods);
 584         return 0;
 585 }
 586
 587
 588 static int wps_build_probe_config_methods(struct wps_registrar *reg,
 589                                           struct wpabuf *msg)
 590 {
 591         u16 methods;
 592         /*
 593          * These are the methods that the AP supports as an Enrollee for adding
 594          * external Registrars.
 595          */
 596         methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
 597 #ifdef CONFIG_WPS2
 598         methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
 599                      WPS_CONFIG_PHY_PUSHBUTTON);
 600 #endif /* CONFIG_WPS2 */
 601         wpa_printf(MSG_DEBUG, "WPS:  * Config Methods (%x)", methods);
 602         wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
 603         wpabuf_put_be16(msg, 2);
 604         wpabuf_put_be16(msg, methods);
 605         return 0;
 606 }
 607
 608
 609 static int wps_build_config_methods_r(struct wps_registrar *reg,
 610                                       struct wpabuf *msg)
 611 {
 612         return wps_build_config_methods(msg, reg->wps->config_methods);
 613 }
 614
 615
 616 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
 617 {
 618         *count = 0;
 619
 620 #ifdef CONFIG_WPS2
 621         while (*count < WPS_MAX_AUTHORIZED_MACS) {
 622                 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
 623                         break;
 624                 (*count)++;
 625         }
 626 #endif /* CONFIG_WPS2 */
 627
 628         return (const u8 *) reg->authorized_macs_union;
 629 }
 630
 631
 632 /**
 633  * wps_registrar_init - Initialize WPS Registrar data
 634  * @wps: Pointer to longterm WPS context
 635  * @cfg: Registrar configuration
 636  * Returns: Pointer to allocated Registrar data or %NULL on failure
 637  *
 638  * This function is used to initialize WPS Registrar functionality. It can be
 639  * used for a single Registrar run (e.g., when run in a supplicant) or multiple
 640  * runs (e.g., when run as an internal Registrar in an AP). Caller is
 641  * responsible for freeing the returned data with wps_registrar_deinit() when
 642  * Registrar functionality is not needed anymore.
 643  */
 644 struct wps_registrar *
 645 wps_registrar_init(struct wps_context *wps,
 646                    const struct wps_registrar_config *cfg)
 647 {
 648         struct wps_registrar *reg = os_zalloc(sizeof(*reg));
 649         if (reg == NULL)
 650                 return NULL;
 651
 652         dl_list_init(&reg->pins);
 653         dl_list_init(&reg->nfc_pw_tokens);
 654         reg->wps = wps;
 655         reg->new_psk_cb = cfg->new_psk_cb;
 656         reg->set_ie_cb = cfg->set_ie_cb;
 657         reg->pin_needed_cb = cfg->pin_needed_cb;
 658         reg->reg_success_cb = cfg->reg_success_cb;
 659         reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
 660         reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
 661         reg->cb_ctx = cfg->cb_ctx;
 662         reg->skip_cred_build = cfg->skip_cred_build;
 663         if (cfg->extra_cred) {
 664                 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
 665                                                     cfg->extra_cred_len);
 666                 if (reg->extra_cred == NULL) {
 667                         os_free(reg);
 668                         return NULL;
 669                 }
 670         }
 671         reg->disable_auto_conf = cfg->disable_auto_conf;
 672         reg->sel_reg_dev_password_id_override = -1;
 673         reg->sel_reg_config_methods_override = -1;
 674         reg->static_wep_only = cfg->static_wep_only;
 675         reg->dualband = cfg->dualband;
 676         reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
 677
 678         if (wps_set_ie(reg)) {
 679                 wps_registrar_deinit(reg);
 680                 return NULL;
 681         }
 682
 683         return reg;
 684 }
 685
 686
 687 /**
 688  * wps_registrar_deinit - Deinitialize WPS Registrar data
 689  * @reg: Registrar data from wps_registrar_init()
 690  */
 691 void wps_registrar_deinit(struct wps_registrar *reg)
 692 {
 693         if (reg == NULL)
 694                 return;
 695         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
 696         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 697         wps_free_pins(&reg->pins);
 698         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, 0);
 699         wps_free_pbc_sessions(reg->pbc_sessions);
 700         wpabuf_free(reg->extra_cred);
 701         wps_free_devices(reg->devices);
 702         os_free(reg);
 703 }
 704
 705
 706 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
 707 {
 708         struct wps_uuid_pin *pin;
 709
 710         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 711                 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
 712                         wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
 713                                    "configured wildcard PIN");
 714                         wps_registrar_remove_pin(reg, pin);
 715                         break;
 716                 }
 717         }
 718 }
 719
 720
 721 /**
 722  * wps_registrar_add_pin - Configure a new PIN for Registrar
 723  * @reg: Registrar data from wps_registrar_init()
 724  * @addr: Enrollee MAC address or %NULL if not known
 725  * @uuid: UUID-E or %NULL for wildcard (any UUID)
 726  * @pin: PIN (Device Password)
 727  * @pin_len: Length of pin in octets
 728  * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
 729  * Returns: 0 on success, -1 on failure
 730  */
 731 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
 732                           const u8 *uuid, const u8 *pin, size_t pin_len,
 733                           int timeout)
 734 {
 735         struct wps_uuid_pin *p;
 736
 737         p = os_zalloc(sizeof(*p));
 738         if (p == NULL)
 739                 return -1;
 740         if (addr)
 741                 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
 742         if (uuid == NULL)
 743                 p->wildcard_uuid = 1;
 744         else
 745                 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
 746         p->pin = os_malloc(pin_len);
 747         if (p->pin == NULL) {
 748                 os_free(p);
 749                 return -1;
 750         }
 751         os_memcpy(p->pin, pin, pin_len);
 752         p->pin_len = pin_len;
 753
 754         if (timeout) {
 755                 p->flags |= PIN_EXPIRES;
 756                 os_get_reltime(&p->expiration);
 757                 p->expiration.sec += timeout;
 758         }
 759
 760         if (p->wildcard_uuid)
 761                 wps_registrar_invalidate_unused(reg);
 762
 763         dl_list_add(&reg->pins, &p->list);
 764
 765         wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
 766                    timeout);
 767         wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
 768         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
 769         reg->selected_registrar = 1;
 770         reg->pbc = 0;
 771         if (addr)
 772                 wps_registrar_add_authorized_mac(reg, addr);
 773         else
 774                 wps_registrar_add_authorized_mac(
 775                         reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
 776         wps_registrar_selected_registrar_changed(reg, 0);
 777         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
 778         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
 779                                wps_registrar_set_selected_timeout,
 780                                reg, NULL);
 781
 782         return 0;
 783 }
 784
 785
 786 static void wps_registrar_remove_pin(struct wps_registrar *reg,
 787                                      struct wps_uuid_pin *pin)
 788 {
 789         u8 *addr;
 790         u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 791
 792         if (is_zero_ether_addr(pin->enrollee_addr))
 793                 addr = bcast;
 794         else
 795                 addr = pin->enrollee_addr;
 796         wps_registrar_remove_authorized_mac(reg, addr);
 797         wps_remove_pin(pin);
 798         wps_registrar_selected_registrar_changed(reg, 0);
 799 }
 800
 801
 802 static void wps_registrar_expire_pins(struct wps_registrar *reg)
 803 {
 804         struct wps_uuid_pin *pin, *prev;
 805         struct os_reltime now;
 806
 807         os_get_reltime(&now);
 808         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 809         {
 810                 if ((pin->flags & PIN_EXPIRES) &&
 811                     os_reltime_before(&pin->expiration, &now)) {
 812                         wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
 813                                     pin->uuid, WPS_UUID_LEN);
 814                         wps_registrar_remove_pin(reg, pin);
 815                 }
 816         }
 817 }
 818
 819
 820 /**
 821  * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
 822  * @reg: Registrar data from wps_registrar_init()
 823  * @dev_pw: PIN to search for or %NULL to match any
 824  * @dev_pw_len: Length of dev_pw in octets
 825  * Returns: 0 on success, -1 if not wildcard PIN is enabled
 826  */
 827 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
 828                                                  const u8 *dev_pw,
 829                                                  size_t dev_pw_len)
 830 {
 831         struct wps_uuid_pin *pin, *prev;
 832
 833         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 834         {
 835                 if (dev_pw && pin->pin &&
 836                     (dev_pw_len != pin->pin_len ||
 837                      os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0))
 838                         continue; /* different PIN */
 839                 if (pin->wildcard_uuid) {
 840                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 841                                     pin->uuid, WPS_UUID_LEN);
 842                         wps_registrar_remove_pin(reg, pin);
 843                         return 0;
 844                 }
 845         }
 846
 847         return -1;
 848 }
 849
 850
 851 /**
 852  * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
 853  * @reg: Registrar data from wps_registrar_init()
 854  * @uuid: UUID-E
 855  * Returns: 0 on success, -1 on failure (e.g., PIN not found)
 856  */
 857 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
 858 {
 859         struct wps_uuid_pin *pin, *prev;
 860
 861         dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
 862         {
 863                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 864                         wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
 865                                     pin->uuid, WPS_UUID_LEN);
 866                         wps_registrar_remove_pin(reg, pin);
 867                         return 0;
 868                 }
 869         }
 870
 871         return -1;
 872 }
 873
 874
 875 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
 876                                         const u8 *uuid, size_t *pin_len)
 877 {
 878         struct wps_uuid_pin *pin, *found = NULL;
 879
 880         wps_registrar_expire_pins(reg);
 881
 882         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 883                 if (!pin->wildcard_uuid &&
 884                     os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 885                         found = pin;
 886                         break;
 887                 }
 888         }
 889
 890         if (!found) {
 891                 /* Check for wildcard UUIDs since none of the UUID-specific
 892                  * PINs matched */
 893                 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 894                         if (pin->wildcard_uuid == 1 ||
 895                             pin->wildcard_uuid == 2) {
 896                                 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
 897                                            "PIN. Assigned it for this UUID-E");
 898                                 pin->wildcard_uuid++;
 899                                 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
 900                                 found = pin;
 901                                 break;
 902                         }
 903                 }
 904         }
 905
 906         if (!found)
 907                 return NULL;
 908
 909         /*
 910          * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
 911          * that could otherwise avoid PIN invalidations.
 912          */
 913         if (found->flags & PIN_LOCKED) {
 914                 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
 915                            "allow concurrent re-use");
 916                 return NULL;
 917         }
 918         *pin_len = found->pin_len;
 919         found->flags |= PIN_LOCKED;
 920         return found->pin;
 921 }
 922
 923
 924 /**
 925  * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
 926  * @reg: Registrar data from wps_registrar_init()
 927  * @uuid: UUID-E
 928  * Returns: 0 on success, -1 on failure
 929  *
 930  * PINs are locked to enforce only one concurrent use. This function unlocks a
 931  * PIN to allow it to be used again. If the specified PIN was configured using
 932  * a wildcard UUID, it will be removed instead of allowing multiple uses.
 933  */
 934 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
 935 {
 936         struct wps_uuid_pin *pin;
 937
 938         dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
 939                 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
 940                         if (pin->wildcard_uuid == 3) {
 941                                 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
 942                                            "wildcard PIN");
 943                                 return wps_registrar_invalidate_pin(reg, uuid);
 944                         }
 945                         pin->flags &= ~PIN_LOCKED;
 946                         return 0;
 947                 }
 948         }
 949
 950         return -1;
 951 }
 952
 953
 954 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
 955 {
 956         reg->selected_registrar = 0;
 957         reg->pbc = 0;
 958         os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
 959         wps_registrar_remove_authorized_mac(reg,
 960                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
 961         wps_registrar_selected_registrar_changed(reg, 0);
 962 }
 963
 964
 965 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
 966 {
 967         struct wps_registrar *reg = eloop_ctx;
 968
 969         wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
 970         wps_pbc_timeout_event(reg->wps);
 971         wps_registrar_stop_pbc(reg);
 972 }
 973
 974
 975 /**
 976  * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
 977  * @reg: Registrar data from wps_registrar_init()
 978  * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
 979  *      indicates no such filtering
 980  * Returns: 0 on success, -1 on failure, -2 on session overlap
 981  *
 982  * This function is called on an AP when a push button is pushed to activate
 983  * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
 984  * or when a PBC registration is completed. If more than one Enrollee in active
 985  * PBC mode has been detected during the monitor time (previous 2 minutes), the
 986  * PBC mode is not activated and -2 is returned to indicate session overlap.
 987  * This is skipped if a specific Enrollee is selected.
 988  */
 989 int wps_registrar_button_pushed(struct wps_registrar *reg,
 990                                 const u8 *p2p_dev_addr)
 991 {
 992         if (p2p_dev_addr == NULL &&
 993             wps_registrar_pbc_overlap(reg, NULL, NULL)) {
 994                 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
 995                            "mode");
 996                 wps_pbc_overlap_event(reg->wps);
 997                 return -2;
 998         }
 999         wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
1000         reg->force_pbc_overlap = 0;
1001         reg->selected_registrar = 1;
1002         reg->pbc = 1;
1003         if (p2p_dev_addr)
1004                 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
1005         else
1006                 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1007         wps_registrar_add_authorized_mac(reg,
1008                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
1009         wps_registrar_selected_registrar_changed(reg, 0);
1010
1011         wps_pbc_active_event(reg->wps);
1012         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1013         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1014         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1015                                reg, NULL);
1016         return 0;
1017 }
1018
1019
1020 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1021 {
1022         wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1023         eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1024         wps_registrar_stop_pbc(reg);
1025         wps_pbc_disable_event(reg->wps);
1026 }
1027
1028
1029 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1030 {
1031         wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1032         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1033         reg->selected_registrar = 0;
1034         wps_registrar_selected_registrar_changed(reg, 0);
1035 }
1036
1037
1038 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1039                             const u8 *dev_pw, size_t dev_pw_len)
1040 {
1041         if (registrar->pbc) {
1042                 wps_registrar_remove_pbc_session(registrar,
1043                                                  uuid_e, NULL);
1044                 wps_registrar_pbc_completed(registrar);
1045 #ifdef WPS_WORKAROUNDS
1046                 os_get_reltime(&registrar->pbc_ignore_start);
1047 #endif /* WPS_WORKAROUNDS */
1048                 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1049         } else {
1050                 wps_registrar_pin_completed(registrar);
1051         }
1052
1053         if (dev_pw &&
1054             wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1055                                                   dev_pw_len) == 0) {
1056                 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1057                                 dev_pw, dev_pw_len);
1058         }
1059 }
1060
1061
1062 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1063 {
1064         if (reg->pbc) {
1065                 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1066                 wps_registrar_pbc_timeout(reg, NULL);
1067                 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1068                 return 1;
1069         } else if (reg->selected_registrar) {
1070                 /* PIN Method */
1071                 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1072                 wps_registrar_pin_completed(reg);
1073                 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1074                 return 1;
1075         }
1076         return 0;
1077 }
1078
1079
1080 /**
1081  * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1082  * @reg: Registrar data from wps_registrar_init()
1083  * @addr: MAC address of the Probe Request sender
1084  * @wps_data: WPS IE contents
1085  *
1086  * This function is called on an AP when a Probe Request with WPS IE is
1087  * received. This is used to track PBC mode use and to detect possible overlap
1088  * situation with other WPS APs.
1089  */
1090 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1091                                 const struct wpabuf *wps_data,
1092                                 int p2p_wildcard)
1093 {
1094         struct wps_parse_attr attr;
1095         int skip_add = 0;
1096
1097         wpa_hexdump_buf(MSG_MSGDUMP,
1098                         "WPS: Probe Request with WPS data received",
1099                         wps_data);
1100
1101         if (wps_parse_msg(wps_data, &attr) < 0)
1102                 return;
1103
1104         if (attr.config_methods == NULL) {
1105                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1106                            "Probe Request");
1107                 return;
1108         }
1109
1110         if (attr.dev_password_id == NULL) {
1111                 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1112                            "in Probe Request");
1113                 return;
1114         }
1115
1116         if (reg->enrollee_seen_cb && attr.uuid_e &&
1117             attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1118                 char *dev_name = NULL;
1119                 if (attr.dev_name) {
1120                         dev_name = os_zalloc(attr.dev_name_len + 1);
1121                         if (dev_name) {
1122                                 os_memcpy(dev_name, attr.dev_name,
1123                                           attr.dev_name_len);
1124                         }
1125                 }
1126                 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1127                                       attr.primary_dev_type,
1128                                       WPA_GET_BE16(attr.config_methods),
1129                                       WPA_GET_BE16(attr.dev_password_id),
1130                                       *attr.request_type, dev_name);
1131                 os_free(dev_name);
1132         }
1133
1134         if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1135                 return; /* Not PBC */
1136
1137         wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1138                    MACSTR, MAC2STR(addr));
1139         if (attr.uuid_e == NULL) {
1140                 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1141                            "UUID-E included");
1142                 return;
1143         }
1144         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1145                     WPS_UUID_LEN);
1146
1147 #ifdef WPS_WORKAROUNDS
1148         if (reg->pbc_ignore_start.sec &&
1149             os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1150                 struct os_reltime now, dur;
1151                 os_get_reltime(&now);
1152                 os_reltime_sub(&now, &reg->pbc_ignore_start, &dur);
1153                 if (dur.sec >= 0 && dur.sec < 5) {
1154                         wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1155                                    "based on Probe Request from the Enrollee "
1156                                    "that just completed PBC provisioning");
1157                         skip_add = 1;
1158                 } else
1159                         reg->pbc_ignore_start.sec = 0;
1160         }
1161 #endif /* WPS_WORKAROUNDS */
1162
1163         if (!skip_add)
1164                 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1165         if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1166                 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1167                 reg->force_pbc_overlap = 1;
1168                 wps_pbc_overlap_event(reg->wps);
1169         }
1170 }
1171
1172
1173 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1174                           const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1175 {
1176         if (reg->new_psk_cb == NULL)
1177                 return 0;
1178
1179         return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1180                                psk_len);
1181 }
1182
1183
1184 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1185                               const struct wps_device_data *dev)
1186 {
1187         if (reg->pin_needed_cb == NULL)
1188                 return;
1189
1190         reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1191 }
1192
1193
1194 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1195                                const u8 *uuid_e, const u8 *dev_pw,
1196                                size_t dev_pw_len)
1197 {
1198         if (reg->reg_success_cb == NULL)
1199                 return;
1200
1201         reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1202 }
1203
1204
1205 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1206                          struct wpabuf *probe_resp_ie)
1207 {
1208         return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1209 }
1210
1211
1212 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1213 {
1214         u16 methods = 0;
1215         if (reg->set_sel_reg_cb == NULL)
1216                 return;
1217
1218         if (reg->selected_registrar) {
1219                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1220 #ifdef CONFIG_WPS2
1221                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1222                              WPS_CONFIG_PHY_PUSHBUTTON);
1223 #endif /* CONFIG_WPS2 */
1224                 if (reg->pbc)
1225                         wps_set_pushbutton(&methods, reg->wps->config_methods);
1226         }
1227
1228         wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1229                    "config_methods=0x%x pbc=%d methods=0x%x",
1230                    reg->selected_registrar, reg->wps->config_methods,
1231                    reg->pbc, methods);
1232
1233         reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1234                             reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1235                             methods);
1236 }
1237
1238
1239 static int wps_set_ie(struct wps_registrar *reg)
1240 {
1241         struct wpabuf *beacon;
1242         struct wpabuf *probe;
1243         const u8 *auth_macs;
1244         size_t count;
1245         size_t vendor_len = 0;
1246         int i;
1247
1248         if (reg->set_ie_cb == NULL)
1249                 return 0;
1250
1251         for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1252                 if (reg->wps->dev.vendor_ext[i]) {
1253                         vendor_len += 2 + 2;
1254                         vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1255                 }
1256         }
1257
1258         beacon = wpabuf_alloc(400 + vendor_len);
1259         if (beacon == NULL)
1260                 return -1;
1261         probe = wpabuf_alloc(500 + vendor_len);
1262         if (probe == NULL) {
1263                 wpabuf_free(beacon);
1264                 return -1;
1265         }
1266
1267         auth_macs = wps_authorized_macs(reg, &count);
1268
1269         wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1270
1271         if (wps_build_version(beacon) ||
1272             wps_build_wps_state(reg->wps, beacon) ||
1273             wps_build_ap_setup_locked(reg->wps, beacon) ||
1274             wps_build_selected_registrar(reg, beacon) ||
1275             wps_build_sel_reg_dev_password_id(reg, beacon) ||
1276             wps_build_sel_reg_config_methods(reg, beacon) ||
1277             wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1278             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon, 0)) ||
1279             wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1280             wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1281                 wpabuf_free(beacon);
1282                 wpabuf_free(probe);
1283                 return -1;
1284         }
1285
1286 #ifdef CONFIG_P2P
1287         if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1288             wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1289                 wpabuf_free(beacon);
1290                 wpabuf_free(probe);
1291                 return -1;
1292         }
1293 #endif /* CONFIG_P2P */
1294
1295         wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1296
1297         if (wps_build_version(probe) ||
1298             wps_build_wps_state(reg->wps, probe) ||
1299             wps_build_ap_setup_locked(reg->wps, probe) ||
1300             wps_build_selected_registrar(reg, probe) ||
1301             wps_build_sel_reg_dev_password_id(reg, probe) ||
1302             wps_build_sel_reg_config_methods(reg, probe) ||
1303             wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1304                                 WPS_RESP_REGISTRAR) ||
1305             wps_build_uuid_e(probe, reg->wps->uuid) ||
1306             wps_build_device_attrs(&reg->wps->dev, probe) ||
1307             wps_build_probe_config_methods(reg, probe) ||
1308             (reg->dualband && wps_build_rf_bands(&reg->wps->dev, probe, 0)) ||
1309             wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1310             wps_build_vendor_ext(&reg->wps->dev, probe)) {
1311                 wpabuf_free(beacon);
1312                 wpabuf_free(probe);
1313                 return -1;
1314         }
1315
1316         beacon = wps_ie_encapsulate(beacon);
1317         probe = wps_ie_encapsulate(probe);
1318
1319         if (!beacon || !probe) {
1320                 wpabuf_free(beacon);
1321                 wpabuf_free(probe);
1322                 return -1;
1323         }
1324
1325         if (reg->static_wep_only) {
1326                 /*
1327                  * Windows XP and Vista clients can get confused about
1328                  * EAP-Identity/Request when they probe the network with
1329                  * EAPOL-Start. In such a case, they may assume the network is
1330                  * using IEEE 802.1X and prompt user for a certificate while
1331                  * the correct (non-WPS) behavior would be to ask for the
1332                  * static WEP key. As a workaround, use Microsoft Provisioning
1333                  * IE to advertise that legacy 802.1X is not supported.
1334                  */
1335                 const u8 ms_wps[7] = {
1336                         WLAN_EID_VENDOR_SPECIFIC, 5,
1337                         /* Microsoft Provisioning IE (00:50:f2:5) */
1338                         0x00, 0x50, 0xf2, 5,
1339                         0x00 /* no legacy 802.1X or MS WPS */
1340                 };
1341                 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1342                            "into Beacon/Probe Response frames");
1343                 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1344                 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1345         }
1346
1347         return wps_cb_set_ie(reg, beacon, probe);
1348 }
1349
1350
1351 static int wps_get_dev_password(struct wps_data *wps)
1352 {
1353         const u8 *pin;
1354         size_t pin_len = 0;
1355
1356         os_free(wps->dev_password);
1357         wps->dev_password = NULL;
1358
1359         if (wps->pbc) {
1360                 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1361                 pin = (const u8 *) "00000000";
1362                 pin_len = 8;
1363 #ifdef CONFIG_WPS_NFC
1364         } else if (wps->nfc_pw_token) {
1365                 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1366                 {
1367                         wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1368                                    "handover and abbreviated WPS handshake "
1369                                    "without Device Password");
1370                         return 0;
1371                 }
1372                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1373                            "Password Token");
1374                 pin = wps->nfc_pw_token->dev_pw;
1375                 pin_len = wps->nfc_pw_token->dev_pw_len;
1376         } else if (wps->dev_pw_id >= 0x10 &&
1377                    wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1378                    wps->wps->ap_nfc_dev_pw) {
1379                 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1380                 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1381                 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1382 #endif /* CONFIG_WPS_NFC */
1383         } else {
1384                 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1385                                             &pin_len);
1386                 if (pin && wps->dev_pw_id >= 0x10) {
1387                         wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1388                                    "Password ID, but PIN found");
1389                         /*
1390                          * See whether Enrollee is willing to use PIN instead.
1391                          */
1392                         wps->dev_pw_id = DEV_PW_DEFAULT;
1393                 }
1394         }
1395         if (pin == NULL) {
1396                 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1397                            "the Enrollee (context %p registrar %p)",
1398                            wps->wps, wps->wps->registrar);
1399                 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1400                                   &wps->peer_dev);
1401                 return -1;
1402         }
1403
1404         wps->dev_password = os_malloc(pin_len);
1405         if (wps->dev_password == NULL)
1406                 return -1;
1407         os_memcpy(wps->dev_password, pin, pin_len);
1408         wps->dev_password_len = pin_len;
1409
1410         return 0;
1411 }
1412
1413
1414 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1415 {
1416         wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1417         wpabuf_put_be16(msg, ATTR_UUID_R);
1418         wpabuf_put_be16(msg, WPS_UUID_LEN);
1419         wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1420         return 0;
1421 }
1422
1423
1424 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1425 {
1426         u8 *hash;
1427         const u8 *addr[4];
1428         size_t len[4];
1429
1430         if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1431                 return -1;
1432         wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1433         wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1434                     wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1435
1436         if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1437                 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1438                            "R-Hash derivation");
1439                 return -1;
1440         }
1441
1442         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1443         wpabuf_put_be16(msg, ATTR_R_HASH1);
1444         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1445         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1446         /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1447         addr[0] = wps->snonce;
1448         len[0] = WPS_SECRET_NONCE_LEN;
1449         addr[1] = wps->psk1;
1450         len[1] = WPS_PSK_LEN;
1451         addr[2] = wpabuf_head(wps->dh_pubkey_e);
1452         len[2] = wpabuf_len(wps->dh_pubkey_e);
1453         addr[3] = wpabuf_head(wps->dh_pubkey_r);
1454         len[3] = wpabuf_len(wps->dh_pubkey_r);
1455         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1456         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1457
1458         wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1459         wpabuf_put_be16(msg, ATTR_R_HASH2);
1460         wpabuf_put_be16(msg, SHA256_MAC_LEN);
1461         hash = wpabuf_put(msg, SHA256_MAC_LEN);
1462         /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1463         addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1464         addr[1] = wps->psk2;
1465         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1466         wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1467
1468         return 0;
1469 }
1470
1471
1472 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1473 {
1474         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1475         wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1476         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1477         wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1478         return 0;
1479 }
1480
1481
1482 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1483 {
1484         wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1485         wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1486         wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1487         wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1488                         WPS_SECRET_NONCE_LEN);
1489         return 0;
1490 }
1491
1492
1493 static int wps_build_cred_network_idx(struct wpabuf *msg,
1494                                       const struct wps_credential *cred)
1495 {
1496         wpa_printf(MSG_DEBUG, "WPS:  * Network Index (1)");
1497         wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1498         wpabuf_put_be16(msg, 1);
1499         wpabuf_put_u8(msg, 1);
1500         return 0;
1501 }
1502
1503
1504 static int wps_build_cred_ssid(struct wpabuf *msg,
1505                                const struct wps_credential *cred)
1506 {
1507         wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1508         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1509                           cred->ssid, cred->ssid_len);
1510         wpabuf_put_be16(msg, ATTR_SSID);
1511         wpabuf_put_be16(msg, cred->ssid_len);
1512         wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1513         return 0;
1514 }
1515
1516
1517 static int wps_build_cred_auth_type(struct wpabuf *msg,
1518                                     const struct wps_credential *cred)
1519 {
1520         wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1521                    cred->auth_type);
1522         wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1523         wpabuf_put_be16(msg, 2);
1524         wpabuf_put_be16(msg, cred->auth_type);
1525         return 0;
1526 }
1527
1528
1529 static int wps_build_cred_encr_type(struct wpabuf *msg,
1530                                     const struct wps_credential *cred)
1531 {
1532         wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1533                    cred->encr_type);
1534         wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1535         wpabuf_put_be16(msg, 2);
1536         wpabuf_put_be16(msg, cred->encr_type);
1537         return 0;
1538 }
1539
1540
1541 static int wps_build_cred_network_key(struct wpabuf *msg,
1542                                       const struct wps_credential *cred)
1543 {
1544         wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1545                    (int) cred->key_len);
1546         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1547                         cred->key, cred->key_len);
1548         wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1549         wpabuf_put_be16(msg, cred->key_len);
1550         wpabuf_put_data(msg, cred->key, cred->key_len);
1551         return 0;
1552 }
1553
1554
1555 static int wps_build_credential(struct wpabuf *msg,
1556                                 const struct wps_credential *cred)
1557 {
1558         if (wps_build_cred_network_idx(msg, cred) ||
1559             wps_build_cred_ssid(msg, cred) ||
1560             wps_build_cred_auth_type(msg, cred) ||
1561             wps_build_cred_encr_type(msg, cred) ||
1562             wps_build_cred_network_key(msg, cred) ||
1563             wps_build_mac_addr(msg, cred->mac_addr))
1564                 return -1;
1565         return 0;
1566 }
1567
1568
1569 int wps_build_credential_wrap(struct wpabuf *msg,
1570                               const struct wps_credential *cred)
1571 {
1572         struct wpabuf *wbuf;
1573         wbuf = wpabuf_alloc(200);
1574         if (wbuf == NULL)
1575                 return -1;
1576         if (wps_build_credential(wbuf, cred)) {
1577                 wpabuf_free(wbuf);
1578                 return -1;
1579         }
1580         wpabuf_put_be16(msg, ATTR_CRED);
1581         wpabuf_put_be16(msg, wpabuf_len(wbuf));
1582         wpabuf_put_buf(msg, wbuf);
1583         wpabuf_free(wbuf);
1584         return 0;
1585 }
1586
1587
1588 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1589 {
1590         struct wpabuf *cred;
1591
1592         if (wps->wps->registrar->skip_cred_build)
1593                 goto skip_cred_build;
1594
1595         wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1596         if (wps->use_cred) {
1597                 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1598                 goto use_provided;
1599         }
1600         os_memset(&wps->cred, 0, sizeof(wps->cred));
1601
1602         os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1603         wps->cred.ssid_len = wps->wps->ssid_len;
1604
1605         /* Select the best authentication and encryption type */
1606         if (wps->auth_type & WPS_AUTH_WPA2PSK)
1607                 wps->auth_type = WPS_AUTH_WPA2PSK;
1608         else if (wps->auth_type & WPS_AUTH_WPAPSK)
1609                 wps->auth_type = WPS_AUTH_WPAPSK;
1610         else if (wps->auth_type & WPS_AUTH_OPEN)
1611                 wps->auth_type = WPS_AUTH_OPEN;
1612         else if (wps->auth_type & WPS_AUTH_SHARED)
1613                 wps->auth_type = WPS_AUTH_SHARED;
1614         else {
1615                 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1616                            wps->auth_type);
1617                 return -1;
1618         }
1619         wps->cred.auth_type = wps->auth_type;
1620
1621         if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1622             wps->auth_type == WPS_AUTH_WPAPSK) {
1623                 if (wps->encr_type & WPS_ENCR_AES)
1624                         wps->encr_type = WPS_ENCR_AES;
1625                 else if (wps->encr_type & WPS_ENCR_TKIP)
1626                         wps->encr_type = WPS_ENCR_TKIP;
1627                 else {
1628                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1629                                    "type for WPA/WPA2");
1630                         return -1;
1631                 }
1632         } else {
1633                 if (wps->encr_type & WPS_ENCR_WEP)
1634                         wps->encr_type = WPS_ENCR_WEP;
1635                 else if (wps->encr_type & WPS_ENCR_NONE)
1636                         wps->encr_type = WPS_ENCR_NONE;
1637                 else {
1638                         wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1639                                    "type for non-WPA/WPA2 mode");
1640                         return -1;
1641                 }
1642         }
1643         wps->cred.encr_type = wps->encr_type;
1644         /*
1645          * Set MAC address in the Credential to be the Enrollee's MAC address
1646          */
1647         os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1648
1649         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1650             !wps->wps->registrar->disable_auto_conf) {
1651                 u8 r[16];
1652                 /* Generate a random passphrase */
1653                 if (random_get_bytes(r, sizeof(r)) < 0)
1654                         return -1;
1655                 os_free(wps->new_psk);
1656                 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1657                 if (wps->new_psk == NULL)
1658                         return -1;
1659                 wps->new_psk_len--; /* remove newline */
1660                 while (wps->new_psk_len &&
1661                        wps->new_psk[wps->new_psk_len - 1] == '=')
1662                         wps->new_psk_len--;
1663                 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1664                                       wps->new_psk, wps->new_psk_len);
1665                 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1666                 wps->cred.key_len = wps->new_psk_len;
1667         } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1668                    wps->use_psk_key && wps->wps->psk_set) {
1669                 char hex[65];
1670                 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1671                 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1672                 os_memcpy(wps->cred.key, hex, 32 * 2);
1673                 wps->cred.key_len = 32 * 2;
1674         } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1675                    wps->wps->network_key) {
1676                 os_memcpy(wps->cred.key, wps->wps->network_key,
1677                           wps->wps->network_key_len);
1678                 wps->cred.key_len = wps->wps->network_key_len;
1679         } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1680                 char hex[65];
1681                 /* Generate a random per-device PSK */
1682                 os_free(wps->new_psk);
1683                 wps->new_psk_len = 32;
1684                 wps->new_psk = os_malloc(wps->new_psk_len);
1685                 if (wps->new_psk == NULL)
1686                         return -1;
1687                 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1688                         os_free(wps->new_psk);
1689                         wps->new_psk = NULL;
1690                         return -1;
1691                 }
1692                 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1693                                 wps->new_psk, wps->new_psk_len);
1694                 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1695                                  wps->new_psk_len);
1696                 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1697                 wps->cred.key_len = wps->new_psk_len * 2;
1698         }
1699
1700 use_provided:
1701 #ifdef CONFIG_WPS_TESTING
1702         if (wps_testing_dummy_cred)
1703                 cred = wpabuf_alloc(200);
1704         else
1705                 cred = NULL;
1706         if (cred) {
1707                 struct wps_credential dummy;
1708                 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1709                 os_memset(&dummy, 0, sizeof(dummy));
1710                 os_memcpy(dummy.ssid, "dummy", 5);
1711                 dummy.ssid_len = 5;
1712                 dummy.auth_type = WPS_AUTH_WPA2PSK;
1713                 dummy.encr_type = WPS_ENCR_AES;
1714                 os_memcpy(dummy.key, "dummy psk", 9);
1715                 dummy.key_len = 9;
1716                 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1717                 wps_build_credential(cred, &dummy);
1718                 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1719
1720                 wpabuf_put_be16(msg, ATTR_CRED);
1721                 wpabuf_put_be16(msg, wpabuf_len(cred));
1722                 wpabuf_put_buf(msg, cred);
1723
1724                 wpabuf_free(cred);
1725         }
1726 #endif /* CONFIG_WPS_TESTING */
1727
1728         cred = wpabuf_alloc(200);
1729         if (cred == NULL)
1730                 return -1;
1731
1732         if (wps_build_credential(cred, &wps->cred)) {
1733                 wpabuf_free(cred);
1734                 return -1;
1735         }
1736
1737         wpabuf_put_be16(msg, ATTR_CRED);
1738         wpabuf_put_be16(msg, wpabuf_len(cred));
1739         wpabuf_put_buf(msg, cred);
1740         wpabuf_free(cred);
1741
1742 skip_cred_build:
1743         if (wps->wps->registrar->extra_cred) {
1744                 wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1745                 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1746         }
1747
1748         return 0;
1749 }
1750
1751
1752 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1753 {
1754         wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1755
1756         if (wps_build_credential(msg, &wps->cred))
1757                 return -1;
1758
1759         return 0;
1760 }
1761
1762
1763 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1764 {
1765         struct wpabuf *msg, *plain;
1766
1767         msg = wpabuf_alloc(1000);
1768         if (msg == NULL)
1769                 return NULL;
1770
1771         plain = wpabuf_alloc(200);
1772         if (plain == NULL) {
1773                 wpabuf_free(msg);
1774                 return NULL;
1775         }
1776
1777         if (wps_build_ap_settings(wps, plain)) {
1778                 wpabuf_free(plain);
1779                 wpabuf_free(msg);
1780                 return NULL;
1781         }
1782
1783         wpabuf_put_be16(msg, ATTR_CRED);
1784         wpabuf_put_be16(msg, wpabuf_len(plain));
1785         wpabuf_put_buf(msg, plain);
1786         wpabuf_free(plain);
1787
1788         return msg;
1789 }
1790
1791
1792 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1793 {
1794         struct wpabuf *msg;
1795         int config_in_m2 = 0;
1796
1797         if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1798                 return NULL;
1799         wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1800                     wps->nonce_r, WPS_NONCE_LEN);
1801         wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1802
1803         wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1804         msg = wpabuf_alloc(1000);
1805         if (msg == NULL)
1806                 return NULL;
1807
1808         if (wps_build_version(msg) ||
1809             wps_build_msg_type(msg, WPS_M2) ||
1810             wps_build_enrollee_nonce(wps, msg) ||
1811             wps_build_registrar_nonce(wps, msg) ||
1812             wps_build_uuid_r(wps, msg) ||
1813             wps_build_public_key(wps, msg) ||
1814             wps_derive_keys(wps) ||
1815             wps_build_auth_type_flags(wps, msg) ||
1816             wps_build_encr_type_flags(wps, msg) ||
1817             wps_build_conn_type_flags(wps, msg) ||
1818             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1819             wps_build_device_attrs(&wps->wps->dev, msg) ||
1820             wps_build_rf_bands(&wps->wps->dev, msg,
1821                                wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1822             wps_build_assoc_state(wps, msg) ||
1823             wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1824             wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1825             wps_build_os_version(&wps->wps->dev, msg) ||
1826             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1827                 wpabuf_free(msg);
1828                 return NULL;
1829         }
1830
1831 #ifdef CONFIG_WPS_NFC
1832         if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1833             wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1834                 /*
1835                  * Use abbreviated handshake since public key hash allowed
1836                  * Enrollee to validate our public key similarly to how Enrollee
1837                  * public key was validated. There is no need to validate Device
1838                  * Password in this case.
1839                  */
1840                 struct wpabuf *plain = wpabuf_alloc(500);
1841                 if (plain == NULL ||
1842                     wps_build_cred(wps, plain) ||
1843                     wps_build_key_wrap_auth(wps, plain) ||
1844                     wps_build_encr_settings(wps, msg, plain)) {
1845                         wpabuf_free(msg);
1846                         wpabuf_free(plain);
1847                         return NULL;
1848                 }
1849                 wpabuf_free(plain);
1850                 config_in_m2 = 1;
1851         }
1852 #endif /* CONFIG_WPS_NFC */
1853
1854         if (wps_build_authenticator(wps, msg)) {
1855                 wpabuf_free(msg);
1856                 return NULL;
1857         }
1858
1859         wps->int_reg = 1;
1860         wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1861         return msg;
1862 }
1863
1864
1865 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1866 {
1867         struct wpabuf *msg;
1868         u16 err = wps->config_error;
1869
1870         wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1871         msg = wpabuf_alloc(1000);
1872         if (msg == NULL)
1873                 return NULL;
1874
1875         if (wps->wps->ap && wps->wps->ap_setup_locked &&
1876             err == WPS_CFG_NO_ERROR)
1877                 err = WPS_CFG_SETUP_LOCKED;
1878
1879         if (wps_build_version(msg) ||
1880             wps_build_msg_type(msg, WPS_M2D) ||
1881             wps_build_enrollee_nonce(wps, msg) ||
1882             wps_build_registrar_nonce(wps, msg) ||
1883             wps_build_uuid_r(wps, msg) ||
1884             wps_build_auth_type_flags(wps, msg) ||
1885             wps_build_encr_type_flags(wps, msg) ||
1886             wps_build_conn_type_flags(wps, msg) ||
1887             wps_build_config_methods_r(wps->wps->registrar, msg) ||
1888             wps_build_device_attrs(&wps->wps->dev, msg) ||
1889             wps_build_rf_bands(&wps->wps->dev, msg,
1890                                wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1891             wps_build_assoc_state(wps, msg) ||
1892             wps_build_config_error(msg, err) ||
1893             wps_build_os_version(&wps->wps->dev, msg) ||
1894             wps_build_wfa_ext(msg, 0, NULL, 0)) {
1895                 wpabuf_free(msg);
1896                 return NULL;
1897         }
1898
1899         wps->state = RECV_M2D_ACK;
1900         return msg;
1901 }
1902
1903
1904 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1905 {
1906         struct wpabuf *msg, *plain;
1907
1908         wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1909
1910         wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1911
1912         plain = wpabuf_alloc(200);
1913         if (plain == NULL)
1914                 return NULL;
1915
1916         msg = wpabuf_alloc(1000);
1917         if (msg == NULL) {
1918                 wpabuf_free(plain);
1919                 return NULL;
1920         }
1921
1922         if (wps_build_version(msg) ||
1923             wps_build_msg_type(msg, WPS_M4) ||
1924             wps_build_enrollee_nonce(wps, msg) ||
1925             wps_build_r_hash(wps, msg) ||
1926             wps_build_r_snonce1(wps, plain) ||
1927             wps_build_key_wrap_auth(wps, plain) ||
1928             wps_build_encr_settings(wps, msg, plain) ||
1929             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1930             wps_build_authenticator(wps, msg)) {
1931                 wpabuf_free(plain);
1932                 wpabuf_free(msg);
1933                 return NULL;
1934         }
1935         wpabuf_free(plain);
1936
1937         wps->state = RECV_M5;
1938         return msg;
1939 }
1940
1941
1942 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1943 {
1944         struct wpabuf *msg, *plain;
1945
1946         wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1947
1948         plain = wpabuf_alloc(200);
1949         if (plain == NULL)
1950                 return NULL;
1951
1952         msg = wpabuf_alloc(1000);
1953         if (msg == NULL) {
1954                 wpabuf_free(plain);
1955                 return NULL;
1956         }
1957
1958         if (wps_build_version(msg) ||
1959             wps_build_msg_type(msg, WPS_M6) ||
1960             wps_build_enrollee_nonce(wps, msg) ||
1961             wps_build_r_snonce2(wps, plain) ||
1962             wps_build_key_wrap_auth(wps, plain) ||
1963             wps_build_encr_settings(wps, msg, plain) ||
1964             wps_build_wfa_ext(msg, 0, NULL, 0) ||
1965             wps_build_authenticator(wps, msg)) {
1966                 wpabuf_free(plain);
1967                 wpabuf_free(msg);
1968                 return NULL;
1969         }
1970         wpabuf_free(plain);
1971
1972         wps->wps_pin_revealed = 1;
1973         wps->state = RECV_M7;
1974         return msg;
1975 }
1976
1977
1978 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1979 {
1980         struct wpabuf *msg, *plain;
1981
1982         wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1983
1984         plain = wpabuf_alloc(500);
1985         if (plain == NULL)
1986                 return NULL;
1987
1988         msg = wpabuf_alloc(1000);
1989         if (msg == NULL) {
1990                 wpabuf_free(plain);
1991                 return NULL;
1992         }
1993
1994         if (wps_build_version(msg) ||
1995             wps_build_msg_type(msg, WPS_M8) ||
1996             wps_build_enrollee_nonce(wps, msg) ||
1997             ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1998             (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1999             wps_build_key_wrap_auth(wps, plain) ||
2000             wps_build_encr_settings(wps, msg, plain) ||
2001             wps_build_wfa_ext(msg, 0, NULL, 0) ||
2002             wps_build_authenticator(wps, msg)) {
2003                 wpabuf_free(plain);
2004                 wpabuf_free(msg);
2005                 return NULL;
2006         }
2007         wpabuf_free(plain);
2008
2009         wps->state = RECV_DONE;
2010         return msg;
2011 }
2012
2013
2014 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2015                                       enum wsc_op_code *op_code)
2016 {
2017         struct wpabuf *msg;
2018
2019 #ifdef CONFIG_WPS_UPNP
2020         if (!wps->int_reg && wps->wps->wps_upnp) {
2021                 struct upnp_pending_message *p, *prev = NULL;
2022                 if (wps->ext_reg > 1)
2023                         wps_registrar_free_pending_m2(wps->wps);
2024                 p = wps->wps->upnp_msgs;
2025                 /* TODO: check pending message MAC address */
2026                 while (p && p->next) {
2027                         prev = p;
2028                         p = p->next;
2029                 }
2030                 if (p) {
2031                         wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2032                                    "UPnP");
2033                         if (prev)
2034                                 prev->next = NULL;
2035                         else
2036                                 wps->wps->upnp_msgs = NULL;
2037                         msg = p->msg;
2038                         switch (p->type) {
2039                         case WPS_WSC_ACK:
2040                                 *op_code = WSC_ACK;
2041                                 break;
2042                         case WPS_WSC_NACK:
2043                                 *op_code = WSC_NACK;
2044                                 break;
2045                         default:
2046                                 *op_code = WSC_MSG;
2047                                 break;
2048                         }
2049                         os_free(p);
2050                         if (wps->ext_reg == 0)
2051                                 wps->ext_reg = 1;
2052                         return msg;
2053                 }
2054         }
2055         if (wps->ext_reg) {
2056                 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2057                            "pending message available");
2058                 return NULL;
2059         }
2060 #endif /* CONFIG_WPS_UPNP */
2061
2062         switch (wps->state) {
2063         case SEND_M2:
2064                 if (wps_get_dev_password(wps) < 0)
2065                         msg = wps_build_m2d(wps);
2066                 else
2067                         msg = wps_build_m2(wps);
2068                 *op_code = WSC_MSG;
2069                 break;
2070         case SEND_M2D:
2071                 msg = wps_build_m2d(wps);
2072                 *op_code = WSC_MSG;
2073                 break;
2074         case SEND_M4:
2075                 msg = wps_build_m4(wps);
2076                 *op_code = WSC_MSG;
2077                 break;
2078         case SEND_M6:
2079                 msg = wps_build_m6(wps);
2080                 *op_code = WSC_MSG;
2081                 break;
2082         case SEND_M8:
2083                 msg = wps_build_m8(wps);
2084                 *op_code = WSC_MSG;
2085                 break;
2086         case RECV_DONE:
2087                 msg = wps_build_wsc_ack(wps);
2088                 *op_code = WSC_ACK;
2089                 break;
2090         case SEND_WSC_NACK:
2091                 msg = wps_build_wsc_nack(wps);
2092                 *op_code = WSC_NACK;
2093                 break;
2094         default:
2095                 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2096                            "a message", wps->state);
2097                 msg = NULL;
2098                 break;
2099         }
2100
2101         if (*op_code == WSC_MSG && msg) {
2102                 /* Save a copy of the last message for Authenticator derivation
2103                  */
2104                 wpabuf_free(wps->last_msg);
2105                 wps->last_msg = wpabuf_dup(msg);
2106         }
2107
2108         return msg;
2109 }
2110
2111
2112 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2113 {
2114         if (e_nonce == NULL) {
2115                 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2116                 return -1;
2117         }
2118
2119         os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2120         wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2121                     wps->nonce_e, WPS_NONCE_LEN);
2122
2123         return 0;
2124 }
2125
2126
2127 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2128 {
2129         if (r_nonce == NULL) {
2130                 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2131                 return -1;
2132         }
2133
2134         if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2135                 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2136                 return -1;
2137         }
2138
2139         return 0;
2140 }
2141
2142
2143 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2144 {
2145         if (uuid_e == NULL) {
2146                 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2147                 return -1;
2148         }
2149
2150         os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2151         wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2152
2153         return 0;
2154 }
2155
2156
2157 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2158 {
2159         if (pw_id == NULL) {
2160                 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2161                 return -1;
2162         }
2163
2164         wps->dev_pw_id = WPA_GET_BE16(pw_id);
2165         wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2166
2167         return 0;
2168 }
2169
2170
2171 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2172 {
2173         if (e_hash1 == NULL) {
2174                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2175                 return -1;
2176         }
2177
2178         os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2179         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2180
2181         return 0;
2182 }
2183
2184
2185 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2186 {
2187         if (e_hash2 == NULL) {
2188                 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2189                 return -1;
2190         }
2191
2192         os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2193         wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2194
2195         return 0;
2196 }
2197
2198
2199 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2200 {
2201         u8 hash[SHA256_MAC_LEN];
2202         const u8 *addr[4];
2203         size_t len[4];
2204
2205         if (e_snonce1 == NULL) {
2206                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2207                 return -1;
2208         }
2209
2210         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2211                         WPS_SECRET_NONCE_LEN);
2212
2213         /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2214         addr[0] = e_snonce1;
2215         len[0] = WPS_SECRET_NONCE_LEN;
2216         addr[1] = wps->psk1;
2217         len[1] = WPS_PSK_LEN;
2218         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2219         len[2] = wpabuf_len(wps->dh_pubkey_e);
2220         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2221         len[3] = wpabuf_len(wps->dh_pubkey_r);
2222         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2223
2224         if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2225                 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2226                            "not match with the pre-committed value");
2227                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2228                 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2229                 return -1;
2230         }
2231
2232         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2233                    "half of the device password");
2234
2235         return 0;
2236 }
2237
2238
2239 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2240 {
2241         u8 hash[SHA256_MAC_LEN];
2242         const u8 *addr[4];
2243         size_t len[4];
2244
2245         if (e_snonce2 == NULL) {
2246                 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2247                 return -1;
2248         }
2249
2250         wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2251                         WPS_SECRET_NONCE_LEN);
2252
2253         /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2254         addr[0] = e_snonce2;
2255         len[0] = WPS_SECRET_NONCE_LEN;
2256         addr[1] = wps->psk2;
2257         len[1] = WPS_PSK_LEN;
2258         addr[2] = wpabuf_head(wps->dh_pubkey_e);
2259         len[2] = wpabuf_len(wps->dh_pubkey_e);
2260         addr[3] = wpabuf_head(wps->dh_pubkey_r);
2261         len[3] = wpabuf_len(wps->dh_pubkey_r);
2262         hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2263
2264         if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2265                 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2266                            "not match with the pre-committed value");
2267                 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2268                 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2269                 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2270                 return -1;
2271         }
2272
2273         wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2274                    "half of the device password");
2275         wps->wps_pin_revealed = 0;
2276         wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2277
2278         /*
2279          * In case wildcard PIN is used and WPS handshake succeeds in the first
2280          * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2281          * sure the PIN gets invalidated here.
2282          */
2283         wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2284
2285         return 0;
2286 }
2287
2288
2289 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2290 {
2291         if (mac_addr == NULL) {
2292                 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2293                 return -1;
2294         }
2295
2296         wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2297                    MAC2STR(mac_addr));
2298         os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2299         os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2300
2301         return 0;
2302 }
2303
2304
2305 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2306                               size_t pk_len)
2307 {
2308         if (pk == NULL || pk_len == 0) {
2309                 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2310                 return -1;
2311         }
2312
2313         wpabuf_free(wps->dh_pubkey_e);
2314         wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2315         if (wps->dh_pubkey_e == NULL)
2316                 return -1;
2317
2318         return 0;
2319 }
2320
2321
2322 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2323 {
2324         u16 auth_types;
2325
2326         if (auth == NULL) {
2327                 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2328                            "received");
2329                 return -1;
2330         }
2331
2332         auth_types = WPA_GET_BE16(auth);
2333
2334         wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2335                    auth_types);
2336         wps->auth_type = wps->wps->auth_types & auth_types;
2337         if (wps->auth_type == 0) {
2338                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2339                            "authentication types (own 0x%x Enrollee 0x%x)",
2340                            wps->wps->auth_types, auth_types);
2341 #ifdef WPS_WORKAROUNDS
2342                 /*
2343                  * Some deployed implementations seem to advertise incorrect
2344                  * information in this attribute. For example, Linksys WRT350N
2345                  * seems to have a byteorder bug that breaks this negotiation.
2346                  * In order to interoperate with existing implementations,
2347                  * assume that the Enrollee supports everything we do.
2348                  */
2349                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2350                            "does not advertise supported authentication types "
2351                            "correctly");
2352                 wps->auth_type = wps->wps->auth_types;
2353 #else /* WPS_WORKAROUNDS */
2354                 return -1;
2355 #endif /* WPS_WORKAROUNDS */
2356         }
2357
2358         return 0;
2359 }
2360
2361
2362 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2363 {
2364         u16 encr_types;
2365
2366         if (encr == NULL) {
2367                 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2368                            "received");
2369                 return -1;
2370         }
2371
2372         encr_types = WPA_GET_BE16(encr);
2373
2374         wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2375                    encr_types);
2376         wps->encr_type = wps->wps->encr_types & encr_types;
2377         if (wps->encr_type == 0) {
2378                 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2379                            "encryption types (own 0x%x Enrollee 0x%x)",
2380                            wps->wps->encr_types, encr_types);
2381 #ifdef WPS_WORKAROUNDS
2382                 /*
2383                  * Some deployed implementations seem to advertise incorrect
2384                  * information in this attribute. For example, Linksys WRT350N
2385                  * seems to have a byteorder bug that breaks this negotiation.
2386                  * In order to interoperate with existing implementations,
2387                  * assume that the Enrollee supports everything we do.
2388                  */
2389                 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2390                            "does not advertise supported encryption types "
2391                            "correctly");
2392                 wps->encr_type = wps->wps->encr_types;
2393 #else /* WPS_WORKAROUNDS */
2394                 return -1;
2395 #endif /* WPS_WORKAROUNDS */
2396         }
2397
2398         return 0;
2399 }
2400
2401
2402 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2403 {
2404         if (conn == NULL) {
2405                 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2406                            "received");
2407                 return -1;
2408         }
2409
2410         wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2411                    *conn);
2412
2413         return 0;
2414 }
2415
2416
2417 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2418 {
2419         u16 m;
2420
2421         if (methods == NULL) {
2422                 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2423                 return -1;
2424         }
2425
2426         m = WPA_GET_BE16(methods);
2427
2428         wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2429                    "%s%s%s%s%s%s%s%s%s", m,
2430                    m & WPS_CONFIG_USBA ? " [USBA]" : "",
2431                    m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2432                    m & WPS_CONFIG_LABEL ? " [Label]" : "",
2433                    m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2434                    m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2435                    m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2436                    m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2437                    m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2438                    m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2439
2440         if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2441                 /*
2442                  * The Enrollee does not have a display so it is unlikely to be
2443                  * able to show the passphrase to a user and as such, could
2444                  * benefit from receiving PSK to reduce key derivation time.
2445                  */
2446                 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2447                            "Enrollee not supporting display");
2448                 wps->use_psk_key = 1;
2449         }
2450
2451         return 0;
2452 }
2453
2454
2455 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2456 {
2457         if (state == NULL) {
2458                 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2459                            "received");
2460                 return -1;
2461         }
2462
2463         wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2464                    *state);
2465
2466         return 0;
2467 }
2468
2469
2470 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2471 {
2472         u16 a;
2473
2474         if (assoc == NULL) {
2475                 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2476                 return -1;
2477         }
2478
2479         a = WPA_GET_BE16(assoc);
2480         wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2481
2482         return 0;
2483 }
2484
2485
2486 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2487 {
2488         u16 e;
2489
2490         if (err == NULL) {
2491                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2492                 return -1;
2493         }
2494
2495         e = WPA_GET_BE16(err);
2496         wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2497
2498         return 0;
2499 }
2500
2501
2502 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2503 {
2504 #ifdef CONFIG_P2P
2505         struct wps_registrar *reg = wps->wps->registrar;
2506
2507         if (is_zero_ether_addr(reg->p2p_dev_addr))
2508                 return 1; /* no filtering in use */
2509
2510         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2511                 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2512                            "filtering for PBC: expected " MACSTR " was "
2513                            MACSTR " - indicate PBC session overlap",
2514                            MAC2STR(reg->p2p_dev_addr),
2515                            MAC2STR(wps->p2p_dev_addr));
2516                 return 0;
2517         }
2518 #endif /* CONFIG_P2P */
2519         return 1;
2520 }
2521
2522
2523 static int wps_registrar_skip_overlap(struct wps_data *wps)
2524 {
2525 #ifdef CONFIG_P2P
2526         struct wps_registrar *reg = wps->wps->registrar;
2527
2528         if (is_zero_ether_addr(reg->p2p_dev_addr))
2529                 return 0; /* no specific Enrollee selected */
2530
2531         if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2532                 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2533                            "Enrollee match");
2534                 return 1;
2535         }
2536 #endif /* CONFIG_P2P */
2537         return 0;
2538 }
2539
2540
2541 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2542                                            struct wps_parse_attr *attr)
2543 {
2544         wpa_printf(MSG_DEBUG, "WPS: Received M1");
2545
2546         if (wps->state != RECV_M1) {
2547                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2548                            "receiving M1", wps->state);
2549                 return WPS_FAILURE;
2550         }
2551
2552         if (wps_process_uuid_e(wps, attr->uuid_e) ||
2553             wps_process_mac_addr(wps, attr->mac_addr) ||
2554             wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2555             wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2556             wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2557             wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2558             wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2559             wps_process_config_methods(wps, attr->config_methods) ||
2560             wps_process_wps_state(wps, attr->wps_state) ||
2561             wps_process_device_attrs(&wps->peer_dev, attr) ||
2562             wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2563             wps_process_assoc_state(wps, attr->assoc_state) ||
2564             wps_process_dev_password_id(wps, attr->dev_password_id) ||
2565             wps_process_config_error(wps, attr->config_error) ||
2566             wps_process_os_version(&wps->peer_dev, attr->os_version))
2567                 return WPS_FAILURE;
2568
2569         if (wps->dev_pw_id < 0x10 &&
2570             wps->dev_pw_id != DEV_PW_DEFAULT &&
2571             wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2572             wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2573             wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2574 #ifdef CONFIG_WPS_NFC
2575             wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2576 #endif /* CONFIG_WPS_NFC */
2577             (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2578              !wps->wps->registrar->pbc)) {
2579                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2580                            wps->dev_pw_id);
2581                 wps->state = SEND_M2D;
2582                 return WPS_CONTINUE;
2583         }
2584
2585 #ifdef CONFIG_WPS_NFC
2586         if (wps->dev_pw_id >= 0x10 ||
2587             wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2588                 struct wps_nfc_pw_token *token;
2589                 const u8 *addr[1];
2590                 u8 hash[WPS_HASH_LEN];
2591
2592                 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2593                            wps->dev_pw_id, wps->wps, wps->wps->registrar);
2594                 token = wps_get_nfc_pw_token(
2595                         &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2596                 if (token && token->peer_pk_hash_known) {
2597                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2598                                    "Password Token");
2599                         dl_list_del(&token->list);
2600                         wps->nfc_pw_token = token;
2601
2602                         addr[0] = attr->public_key;
2603                         sha256_vector(1, addr, &attr->public_key_len, hash);
2604                         if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash,
2605                                       WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2606                                 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2607                                            "mismatch");
2608                                 wps->state = SEND_M2D;
2609                                 wps->config_error =
2610                                         WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2611                                 return WPS_CONTINUE;
2612                         }
2613                 } else if (token) {
2614                         wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2615                                    "Password Token (no peer PK hash)");
2616                         wps->nfc_pw_token = token;
2617                 } else if (wps->dev_pw_id >= 0x10 &&
2618                            wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2619                            wps->wps->ap_nfc_dev_pw) {
2620                         wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2621                 }
2622         }
2623 #endif /* CONFIG_WPS_NFC */
2624
2625         if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2626                 if ((wps->wps->registrar->force_pbc_overlap ||
2627                      wps_registrar_pbc_overlap(wps->wps->registrar,
2628                                                wps->mac_addr_e, wps->uuid_e) ||
2629                      !wps_registrar_p2p_dev_addr_match(wps)) &&
2630                     !wps_registrar_skip_overlap(wps)) {
2631                         wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2632                                    "negotiation");
2633                         wps->state = SEND_M2D;
2634                         wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2635                         wps_pbc_overlap_event(wps->wps);
2636                         wps_fail_event(wps->wps, WPS_M1,
2637                                        WPS_CFG_MULTIPLE_PBC_DETECTED,
2638                                        WPS_EI_NO_ERROR, wps->mac_addr_e);
2639                         wps->wps->registrar->force_pbc_overlap = 1;
2640                         return WPS_CONTINUE;
2641                 }
2642                 wps_registrar_add_pbc_session(wps->wps->registrar,
2643                                               wps->mac_addr_e, wps->uuid_e);
2644                 wps->pbc = 1;
2645         }
2646
2647 #ifdef WPS_WORKAROUNDS
2648         /*
2649          * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2650          * passphrase format. To avoid interop issues, force PSK format to be
2651          * used.
2652          */
2653         if (!wps->use_psk_key &&
2654             wps->peer_dev.manufacturer &&
2655             os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2656             wps->peer_dev.model_name &&
2657             os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2658                 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2659                            "PSK format");
2660                 wps->use_psk_key = 1;
2661         }
2662 #endif /* WPS_WORKAROUNDS */
2663
2664         wps->state = SEND_M2;
2665         return WPS_CONTINUE;
2666 }
2667
2668
2669 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2670                                            const struct wpabuf *msg,
2671                                            struct wps_parse_attr *attr)
2672 {
2673         wpa_printf(MSG_DEBUG, "WPS: Received M3");
2674
2675         if (wps->state != RECV_M3) {
2676                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2677                            "receiving M3", wps->state);
2678                 wps->state = SEND_WSC_NACK;
2679                 return WPS_CONTINUE;
2680         }
2681
2682         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2683             !wps_registrar_skip_overlap(wps)) {
2684                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2685                            "session overlap");
2686                 wps->state = SEND_WSC_NACK;
2687                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2688                 return WPS_CONTINUE;
2689         }
2690
2691         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2692             wps_process_authenticator(wps, attr->authenticator, msg) ||
2693             wps_process_e_hash1(wps, attr->e_hash1) ||
2694             wps_process_e_hash2(wps, attr->e_hash2)) {
2695                 wps->state = SEND_WSC_NACK;
2696                 return WPS_CONTINUE;
2697         }
2698
2699         wps->state = SEND_M4;
2700         return WPS_CONTINUE;
2701 }
2702
2703
2704 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2705                                            const struct wpabuf *msg,
2706                                            struct wps_parse_attr *attr)
2707 {
2708         struct wpabuf *decrypted;
2709         struct wps_parse_attr eattr;
2710
2711         wpa_printf(MSG_DEBUG, "WPS: Received M5");
2712
2713         if (wps->state != RECV_M5) {
2714                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2715                            "receiving M5", wps->state);
2716                 wps->state = SEND_WSC_NACK;
2717                 return WPS_CONTINUE;
2718         }
2719
2720         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2721             !wps_registrar_skip_overlap(wps)) {
2722                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2723                            "session overlap");
2724                 wps->state = SEND_WSC_NACK;
2725                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2726                 return WPS_CONTINUE;
2727         }
2728
2729         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2730             wps_process_authenticator(wps, attr->authenticator, msg)) {
2731                 wps->state = SEND_WSC_NACK;
2732                 return WPS_CONTINUE;
2733         }
2734
2735         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2736                                               attr->encr_settings_len);
2737         if (decrypted == NULL) {
2738                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2739                            "Settings attribute");
2740                 wps->state = SEND_WSC_NACK;
2741                 return WPS_CONTINUE;
2742         }
2743
2744         if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2745                 wpabuf_free(decrypted);
2746                 wps->state = SEND_WSC_NACK;
2747                 return WPS_CONTINUE;
2748         }
2749
2750         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2751                    "attribute");
2752         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2753             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2754             wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2755                 wpabuf_free(decrypted);
2756                 wps->state = SEND_WSC_NACK;
2757                 return WPS_CONTINUE;
2758         }
2759         wpabuf_free(decrypted);
2760
2761         wps->state = SEND_M6;
2762         return WPS_CONTINUE;
2763 }
2764
2765
2766 static void wps_sta_cred_cb(struct wps_data *wps)
2767 {
2768         /*
2769          * Update credential to only include a single authentication and
2770          * encryption type in case the AP configuration includes more than one
2771          * option.
2772          */
2773         if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2774                 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2775         else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2776                 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2777         if (wps->cred.encr_type & WPS_ENCR_AES)
2778                 wps->cred.encr_type = WPS_ENCR_AES;
2779         else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2780                 wps->cred.encr_type = WPS_ENCR_TKIP;
2781         wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2782                    "AP configuration");
2783         if (wps->wps->cred_cb)
2784                 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2785 }
2786
2787
2788 static void wps_cred_update(struct wps_credential *dst,
2789                             struct wps_credential *src)
2790 {
2791         os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2792         dst->ssid_len = src->ssid_len;
2793         dst->auth_type = src->auth_type;
2794         dst->encr_type = src->encr_type;
2795         dst->key_idx = src->key_idx;
2796         os_memcpy(dst->key, src->key, sizeof(dst->key));
2797         dst->key_len = src->key_len;
2798 }
2799
2800
2801 static int wps_process_ap_settings_r(struct wps_data *wps,
2802                                      struct wps_parse_attr *attr)
2803 {
2804         struct wpabuf *msg;
2805
2806         if (wps->wps->ap || wps->er)
2807                 return 0;
2808
2809         /* AP Settings Attributes in M7 when Enrollee is an AP */
2810         if (wps_process_ap_settings(attr, &wps->cred) < 0)
2811                 return -1;
2812
2813         wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2814
2815         if (wps->new_ap_settings) {
2816                 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2817                            "new settings");
2818                 wps_cred_update(&wps->cred, wps->new_ap_settings);
2819                 return 0;
2820         } else {
2821                 /*
2822                  * Use the AP PIN only to receive the current AP settings, not
2823                  * to reconfigure the AP.
2824                  */
2825
2826                 /*
2827                  * Clear selected registrar here since we do not get to
2828                  * WSC_Done in this protocol run.
2829                  */
2830                 wps_registrar_pin_completed(wps->wps->registrar);
2831
2832                 msg = wps_build_ap_cred(wps);
2833                 if (msg == NULL)
2834                         return -1;
2835                 wps->cred.cred_attr = wpabuf_head(msg);
2836                 wps->cred.cred_attr_len = wpabuf_len(msg);
2837
2838                 if (wps->ap_settings_cb) {
2839                         wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2840                                             &wps->cred);
2841                         wpabuf_free(msg);
2842                         return 1;
2843                 }
2844                 wps_sta_cred_cb(wps);
2845
2846                 wps->cred.cred_attr = NULL;
2847                 wps->cred.cred_attr_len = 0;
2848                 wpabuf_free(msg);
2849
2850                 return 1;
2851         }
2852 }
2853
2854
2855 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2856                                            const struct wpabuf *msg,
2857                                            struct wps_parse_attr *attr)
2858 {
2859         struct wpabuf *decrypted;
2860         struct wps_parse_attr eattr;
2861
2862         wpa_printf(MSG_DEBUG, "WPS: Received M7");
2863
2864         if (wps->state != RECV_M7) {
2865                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2866                            "receiving M7", wps->state);
2867                 wps->state = SEND_WSC_NACK;
2868                 return WPS_CONTINUE;
2869         }
2870
2871         if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2872             !wps_registrar_skip_overlap(wps)) {
2873                 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2874                            "session overlap");
2875                 wps->state = SEND_WSC_NACK;
2876                 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2877                 return WPS_CONTINUE;
2878         }
2879
2880         if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2881             wps_process_authenticator(wps, attr->authenticator, msg)) {
2882                 wps->state = SEND_WSC_NACK;
2883                 return WPS_CONTINUE;
2884         }
2885
2886         decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2887                                               attr->encr_settings_len);
2888         if (decrypted == NULL) {
2889                 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2890                            "Settings attribute");
2891                 wps->state = SEND_WSC_NACK;
2892                 return WPS_CONTINUE;
2893         }
2894
2895         if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2896                                  attr->version2 != NULL) < 0) {
2897                 wpabuf_free(decrypted);
2898                 wps->state = SEND_WSC_NACK;
2899                 return WPS_CONTINUE;
2900         }
2901
2902         wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2903                    "attribute");
2904         if (wps_parse_msg(decrypted, &eattr) < 0 ||
2905             wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2906             wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2907             wps_process_ap_settings_r(wps, &eattr)) {
2908                 wpabuf_free(decrypted);
2909                 wps->state = SEND_WSC_NACK;
2910                 return WPS_CONTINUE;
2911         }
2912
2913         wpabuf_free(decrypted);
2914
2915         wps->state = SEND_M8;
2916         return WPS_CONTINUE;
2917 }
2918
2919
2920 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2921                                                 const struct wpabuf *msg)
2922 {
2923         struct wps_parse_attr attr;
2924         enum wps_process_res ret = WPS_CONTINUE;
2925
2926         wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2927
2928         if (wps_parse_msg(msg, &attr) < 0)
2929                 return WPS_FAILURE;
2930
2931         if (attr.msg_type == NULL) {
2932                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2933                 wps->state = SEND_WSC_NACK;
2934                 return WPS_CONTINUE;
2935         }
2936
2937         if (*attr.msg_type != WPS_M1 &&
2938             (attr.registrar_nonce == NULL ||
2939              os_memcmp(wps->nonce_r, attr.registrar_nonce,
2940                        WPS_NONCE_LEN) != 0)) {
2941                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2942                 return WPS_FAILURE;
2943         }
2944
2945         switch (*attr.msg_type) {
2946         case WPS_M1:
2947                 if (wps_validate_m1(msg) < 0)
2948                         return WPS_FAILURE;
2949 #ifdef CONFIG_WPS_UPNP
2950                 if (wps->wps->wps_upnp && attr.mac_addr) {
2951                         /* Remove old pending messages when starting new run */
2952                         wps_free_pending_msgs(wps->wps->upnp_msgs);
2953                         wps->wps->upnp_msgs = NULL;
2954
2955                         upnp_wps_device_send_wlan_event(
2956                                 wps->wps->wps_upnp, attr.mac_addr,
2957                                 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2958                 }
2959 #endif /* CONFIG_WPS_UPNP */
2960                 ret = wps_process_m1(wps, &attr);
2961                 break;
2962         case WPS_M3:
2963                 if (wps_validate_m3(msg) < 0)
2964                         return WPS_FAILURE;
2965                 ret = wps_process_m3(wps, msg, &attr);
2966                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2967                         wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2968                                        wps->error_indication, wps->mac_addr_e);
2969                 break;
2970         case WPS_M5:
2971                 if (wps_validate_m5(msg) < 0)
2972                         return WPS_FAILURE;
2973                 ret = wps_process_m5(wps, msg, &attr);
2974                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2975                         wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2976                                        wps->error_indication, wps->mac_addr_e);
2977                 break;
2978         case WPS_M7:
2979                 if (wps_validate_m7(msg) < 0)
2980                         return WPS_FAILURE;
2981                 ret = wps_process_m7(wps, msg, &attr);
2982                 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2983                         wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2984                                        wps->error_indication, wps->mac_addr_e);
2985                 break;
2986         default:
2987                 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2988                            *attr.msg_type);
2989                 return WPS_FAILURE;
2990         }
2991
2992         if (ret == WPS_CONTINUE) {
2993                 /* Save a copy of the last message for Authenticator derivation
2994                  */
2995                 wpabuf_free(wps->last_msg);
2996                 wps->last_msg = wpabuf_dup(msg);
2997         }
2998
2999         return ret;
3000 }
3001
3002
3003 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
3004                                                 const struct wpabuf *msg)
3005 {
3006         struct wps_parse_attr attr;
3007
3008         wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
3009
3010         if (wps_parse_msg(msg, &attr) < 0)
3011                 return WPS_FAILURE;
3012
3013         if (attr.msg_type == NULL) {
3014                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3015                 return WPS_FAILURE;
3016         }
3017
3018         if (*attr.msg_type != WPS_WSC_ACK) {
3019                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3020                            *attr.msg_type);
3021                 return WPS_FAILURE;
3022         }
3023
3024 #ifdef CONFIG_WPS_UPNP
3025         if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3026             upnp_wps_subscribers(wps->wps->wps_upnp)) {
3027                 if (wps->wps->upnp_msgs)
3028                         return WPS_CONTINUE;
3029                 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3030                            "external Registrar");
3031                 return WPS_PENDING;
3032         }
3033 #endif /* CONFIG_WPS_UPNP */
3034
3035         if (attr.registrar_nonce == NULL ||
3036             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3037         {
3038                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3039                 return WPS_FAILURE;
3040         }
3041
3042         if (attr.enrollee_nonce == NULL ||
3043             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3044                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3045                 return WPS_FAILURE;
3046         }
3047
3048         if (wps->state == RECV_M2D_ACK) {
3049 #ifdef CONFIG_WPS_UPNP
3050                 if (wps->wps->wps_upnp &&
3051                     upnp_wps_subscribers(wps->wps->wps_upnp)) {
3052                         if (wps->wps->upnp_msgs)
3053                                 return WPS_CONTINUE;
3054                         if (wps->ext_reg == 0)
3055                                 wps->ext_reg = 1;
3056                         wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3057                                    "external Registrar");
3058                         return WPS_PENDING;
3059                 }
3060 #endif /* CONFIG_WPS_UPNP */
3061
3062                 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3063                            "terminate negotiation");
3064         }
3065
3066         return WPS_FAILURE;
3067 }
3068
3069
3070 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3071                                                  const struct wpabuf *msg)
3072 {
3073         struct wps_parse_attr attr;
3074         int old_state;
3075         u16 config_error;
3076
3077         wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3078
3079         old_state = wps->state;
3080         wps->state = SEND_WSC_NACK;
3081
3082         if (wps_parse_msg(msg, &attr) < 0)
3083                 return WPS_FAILURE;
3084
3085         if (attr.msg_type == NULL) {
3086                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3087                 return WPS_FAILURE;
3088         }
3089
3090         if (*attr.msg_type != WPS_WSC_NACK) {
3091                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3092                            *attr.msg_type);
3093                 return WPS_FAILURE;
3094         }
3095
3096 #ifdef CONFIG_WPS_UPNP
3097         if (wps->wps->wps_upnp && wps->ext_reg) {
3098                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3099                            "Registrar terminated by the Enrollee");
3100                 return WPS_FAILURE;
3101         }
3102 #endif /* CONFIG_WPS_UPNP */
3103
3104         if (attr.registrar_nonce == NULL ||
3105             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3106         {
3107                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3108                 return WPS_FAILURE;
3109         }
3110
3111         if (attr.enrollee_nonce == NULL ||
3112             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3113                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3114                 return WPS_FAILURE;
3115         }
3116
3117         if (attr.config_error == NULL) {
3118                 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3119                            "in WSC_NACK");
3120                 return WPS_FAILURE;
3121         }
3122
3123         config_error = WPA_GET_BE16(attr.config_error);
3124         wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3125                    "Configuration Error %d", config_error);
3126
3127         switch (old_state) {
3128         case RECV_M3:
3129                 wps_fail_event(wps->wps, WPS_M2, config_error,
3130                                wps->error_indication, wps->mac_addr_e);
3131                 break;
3132         case RECV_M5:
3133                 wps_fail_event(wps->wps, WPS_M4, config_error,
3134                                wps->error_indication, wps->mac_addr_e);
3135                 break;
3136         case RECV_M7:
3137                 wps_fail_event(wps->wps, WPS_M6, config_error,
3138                                wps->error_indication, wps->mac_addr_e);
3139                 break;
3140         case RECV_DONE:
3141                 wps_fail_event(wps->wps, WPS_M8, config_error,
3142                                wps->error_indication, wps->mac_addr_e);
3143                 break;
3144         default:
3145                 break;
3146         }
3147
3148         return WPS_FAILURE;
3149 }
3150
3151
3152 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3153                                                  const struct wpabuf *msg)
3154 {
3155         struct wps_parse_attr attr;
3156
3157         wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3158
3159         if (wps->state != RECV_DONE &&
3160             (!wps->wps->wps_upnp || !wps->ext_reg)) {
3161                 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3162                            "receiving WSC_Done", wps->state);
3163                 return WPS_FAILURE;
3164         }
3165
3166         if (wps_parse_msg(msg, &attr) < 0)
3167                 return WPS_FAILURE;
3168
3169         if (attr.msg_type == NULL) {
3170                 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3171                 return WPS_FAILURE;
3172         }
3173
3174         if (*attr.msg_type != WPS_WSC_DONE) {
3175                 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3176                            *attr.msg_type);
3177                 return WPS_FAILURE;
3178         }
3179
3180 #ifdef CONFIG_WPS_UPNP
3181         if (wps->wps->wps_upnp && wps->ext_reg) {
3182                 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3183                            "Registrar completed successfully");
3184                 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3185                                  wps->uuid_e);
3186                 return WPS_DONE;
3187         }
3188 #endif /* CONFIG_WPS_UPNP */
3189
3190         if (attr.registrar_nonce == NULL ||
3191             os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3192         {
3193                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3194                 return WPS_FAILURE;
3195         }
3196
3197         if (attr.enrollee_nonce == NULL ||
3198             os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3199                 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3200                 return WPS_FAILURE;
3201         }
3202
3203         wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3204         wps_device_store(wps->wps->registrar, &wps->peer_dev,
3205                          wps->uuid_e);
3206
3207         if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3208             wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3209                 struct wps_credential cred;
3210
3211                 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3212                            "on first Enrollee connection");
3213
3214                 os_memset(&cred, 0, sizeof(cred));
3215                 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3216                 cred.ssid_len = wps->wps->ssid_len;
3217                 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3218                 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3219                 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3220                 cred.key_len = wps->new_psk_len;
3221
3222                 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3223                 wpa_hexdump_ascii_key(MSG_DEBUG,
3224                                       "WPS: Generated random passphrase",
3225                                       wps->new_psk, wps->new_psk_len);
3226                 if (wps->wps->cred_cb)
3227                         wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3228
3229                 os_free(wps->new_psk);
3230                 wps->new_psk = NULL;
3231         }
3232
3233         if (!wps->wps->ap && !wps->er)
3234                 wps_sta_cred_cb(wps);
3235
3236         if (wps->new_psk) {
3237                 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3238                                    wps->p2p_dev_addr, wps->new_psk,
3239                                    wps->new_psk_len)) {
3240                         wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3241                                    "new PSK");
3242                 }
3243                 os_free(wps->new_psk);
3244                 wps->new_psk = NULL;
3245         }
3246
3247         wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3248                            wps->dev_password, wps->dev_password_len);
3249
3250         if (wps->pbc) {
3251                 wps_registrar_remove_pbc_session(wps->wps->registrar,
3252                                                  wps->uuid_e,
3253                                                  wps->p2p_dev_addr);
3254                 wps_registrar_pbc_completed(wps->wps->registrar);
3255 #ifdef WPS_WORKAROUNDS
3256                 os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3257 #endif /* WPS_WORKAROUNDS */
3258                 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3259                           WPS_UUID_LEN);
3260         } else {
3261                 wps_registrar_pin_completed(wps->wps->registrar);
3262         }
3263         /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3264          * merge them into APs own list.. */
3265
3266         wps_success_event(wps->wps, wps->mac_addr_e);
3267
3268         return WPS_DONE;
3269 }
3270
3271
3272 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3273                                                enum wsc_op_code op_code,
3274                                                const struct wpabuf *msg)
3275 {
3276         enum wps_process_res ret;
3277
3278         wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3279                    "op_code=%d)",
3280                    (unsigned long) wpabuf_len(msg), op_code);
3281
3282 #ifdef CONFIG_WPS_UPNP
3283         if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3284                 struct wps_parse_attr attr;
3285                 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3286                     *attr.msg_type == WPS_M3)
3287                         wps->ext_reg = 2; /* past M2/M2D phase */
3288         }
3289         if (wps->ext_reg > 1)
3290                 wps_registrar_free_pending_m2(wps->wps);
3291         if (wps->wps->wps_upnp && wps->ext_reg &&
3292             wps->wps->upnp_msgs == NULL &&
3293             (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3294         {
3295                 struct wps_parse_attr attr;
3296                 int type;
3297                 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3298                         type = -1;
3299                 else
3300                         type = *attr.msg_type;
3301                 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3302                            " to external Registrar for processing", type);
3303                 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3304                                                 wps->mac_addr_e,
3305                                                 UPNP_WPS_WLANEVENT_TYPE_EAP,
3306                                                 msg);
3307                 if (op_code == WSC_MSG)
3308                         return WPS_PENDING;
3309         } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3310                 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3311                            "external Registrar");
3312                 return WPS_CONTINUE;
3313         }
3314 #endif /* CONFIG_WPS_UPNP */
3315
3316         switch (op_code) {
3317         case WSC_MSG:
3318                 return wps_process_wsc_msg(wps, msg);
3319         case WSC_ACK:
3320                 if (wps_validate_wsc_ack(msg) < 0)
3321                         return WPS_FAILURE;
3322                 return wps_process_wsc_ack(wps, msg);
3323         case WSC_NACK:
3324                 if (wps_validate_wsc_nack(msg) < 0)
3325                         return WPS_FAILURE;
3326                 return wps_process_wsc_nack(wps, msg);
3327         case WSC_Done:
3328                 if (wps_validate_wsc_done(msg) < 0)
3329                         return WPS_FAILURE;
3330                 ret = wps_process_wsc_done(wps, msg);
3331                 if (ret == WPS_FAILURE) {
3332                         wps->state = SEND_WSC_NACK;
3333                         wps_fail_event(wps->wps, WPS_WSC_DONE,
3334                                        wps->config_error,
3335                                        wps->error_indication, wps->mac_addr_e);
3336                 }
3337                 return ret;
3338         default:
3339                 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3340                 return WPS_FAILURE;
3341         }
3342 }
3343
3344
3345 int wps_registrar_update_ie(struct wps_registrar *reg)
3346 {
3347         return wps_set_ie(reg);
3348 }
3349
3350
3351 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3352                                                void *timeout_ctx)
3353 {
3354         struct wps_registrar *reg = eloop_ctx;
3355
3356         wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3357                    "unselect internal Registrar");
3358         reg->selected_registrar = 0;
3359         reg->pbc = 0;
3360         wps_registrar_selected_registrar_changed(reg, 0);
3361 }
3362
3363
3364 #ifdef CONFIG_WPS_UPNP
3365 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3366                                       struct subscription *s)
3367 {
3368         int i, j;
3369         wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3370                    "config_methods=0x%x)",
3371                    s->dev_password_id, s->config_methods);
3372         reg->sel_reg_union = 1;
3373         if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3374                 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3375         if (reg->sel_reg_config_methods_override == -1)
3376                 reg->sel_reg_config_methods_override = 0;
3377         reg->sel_reg_config_methods_override |= s->config_methods;
3378         for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3379                 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3380                         break;
3381         for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3382              j++) {
3383                 if (is_zero_ether_addr(s->authorized_macs[j]))
3384                         break;
3385                 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3386                            MACSTR, MAC2STR(s->authorized_macs[j]));
3387                 os_memcpy(reg->authorized_macs_union[i],
3388                           s->authorized_macs[j], ETH_ALEN);
3389                 i++;
3390         }
3391         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3392                     (u8 *) reg->authorized_macs_union,
3393                     sizeof(reg->authorized_macs_union));
3394 }
3395 #endif /* CONFIG_WPS_UPNP */
3396
3397
3398 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3399 {
3400 #ifdef CONFIG_WPS_UPNP
3401         struct subscription *s;
3402
3403         if (reg->wps->wps_upnp == NULL)
3404                 return;
3405
3406         dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3407                          struct subscription, list) {
3408                 struct subscr_addr *sa;
3409                 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3410                 if (sa) {
3411                         wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3412                                    inet_ntoa(sa->saddr.sin_addr),
3413                                    ntohs(sa->saddr.sin_port));
3414                 }
3415                 if (s->selected_registrar)
3416                         wps_registrar_sel_reg_add(reg, s);
3417                 else
3418                         wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3419                                    "selected");
3420         }
3421 #endif /* CONFIG_WPS_UPNP */
3422 }
3423
3424
3425 /**
3426  * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3427  * @reg: Registrar data from wps_registrar_init()
3428  *
3429  * This function is called when selected registrar state changes, e.g., when an
3430  * AP receives a SetSelectedRegistrar UPnP message.
3431  */
3432 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3433                                               u16 dev_pw_id)
3434 {
3435         wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3436
3437         reg->sel_reg_union = reg->selected_registrar;
3438         reg->sel_reg_dev_password_id_override = -1;
3439         reg->sel_reg_config_methods_override = -1;
3440         os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3441                   WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3442         wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3443                     (u8 *) reg->authorized_macs_union,
3444                     sizeof(reg->authorized_macs_union));
3445         if (reg->selected_registrar) {
3446                 u16 methods;
3447
3448                 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3449 #ifdef CONFIG_WPS2
3450                 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3451                              WPS_CONFIG_PHY_PUSHBUTTON);
3452 #endif /* CONFIG_WPS2 */
3453                 if (reg->pbc) {
3454                         reg->sel_reg_dev_password_id_override =
3455                                 DEV_PW_PUSHBUTTON;
3456                         wps_set_pushbutton(&methods, reg->wps->config_methods);
3457                 } else if (dev_pw_id)
3458                         reg->sel_reg_dev_password_id_override = dev_pw_id;
3459                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3460                            "(pbc=%d)", reg->pbc);
3461                 reg->sel_reg_config_methods_override = methods;
3462         } else
3463                 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3464
3465         wps_registrar_sel_reg_union(reg);
3466
3467         wps_set_ie(reg);
3468         wps_cb_set_sel_reg(reg);
3469 }
3470
3471
3472 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3473                            char *buf, size_t buflen)
3474 {
3475         struct wps_registrar_device *d;
3476         int len = 0, ret;
3477         char uuid[40];
3478         char devtype[WPS_DEV_TYPE_BUFSIZE];
3479
3480         d = wps_device_get(reg, addr);
3481         if (d == NULL)
3482                 return 0;
3483         if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3484                 return 0;
3485
3486         ret = os_snprintf(buf + len, buflen - len,
3487                           "wpsUuid=%s\n"
3488                           "wpsPrimaryDeviceType=%s\n"
3489                           "wpsDeviceName=%s\n"
3490                           "wpsManufacturer=%s\n"
3491                           "wpsModelName=%s\n"
3492                           "wpsModelNumber=%s\n"
3493                           "wpsSerialNumber=%s\n",
3494                           uuid,
3495                           wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3496                                                sizeof(devtype)),
3497                           d->dev.device_name ? d->dev.device_name : "",
3498                           d->dev.manufacturer ? d->dev.manufacturer : "",
3499                           d->dev.model_name ? d->dev.model_name : "",
3500                           d->dev.model_number ? d->dev.model_number : "",
3501                           d->dev.serial_number ? d->dev.serial_number : "");
3502         if (ret < 0 || (size_t) ret >= buflen - len)
3503                 return len;
3504         len += ret;
3505
3506         return len;
3507 }
3508
3509
3510 int wps_registrar_config_ap(struct wps_registrar *reg,
3511                             struct wps_credential *cred)
3512 {
3513 #ifdef CONFIG_WPS2
3514         wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3515         if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3516                                  WPS_ENCR_AES))) {
3517                 if (cred->encr_type & WPS_ENCR_WEP) {
3518                         wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3519                                    "due to WEP configuration");
3520                         return -1;
3521                 }
3522
3523                 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3524                            "invalid encr_type 0x%x", cred->encr_type);
3525                 return -1;
3526         }
3527
3528         if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3529             WPS_ENCR_TKIP) {
3530                 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3531                            "TKIP+AES");
3532                 cred->encr_type |= WPS_ENCR_AES;
3533         }
3534
3535         if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3536             WPS_AUTH_WPAPSK) {
3537                 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3538                            "WPAPSK+WPA2PSK");
3539                 cred->auth_type |= WPS_AUTH_WPA2PSK;
3540         }
3541 #endif /* CONFIG_WPS2 */
3542
3543         if (reg->wps->cred_cb)
3544                 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3545
3546         return -1;
3547 }
3548
3549
3550 #ifdef CONFIG_WPS_NFC
3551
3552 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3553                                    const u8 *pubkey_hash, u16 pw_id,
3554                                    const u8 *dev_pw, size_t dev_pw_len,
3555                                    int pk_hash_provided_oob)
3556 {
3557         struct wps_nfc_pw_token *token;
3558
3559         if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3560                 return -1;
3561
3562         if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3563             (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3564                 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3565                            "addition - missing public key hash");
3566                 return -1;
3567         }
3568
3569         wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, pw_id);
3570
3571         token = os_zalloc(sizeof(*token));
3572         if (token == NULL)
3573                 return -1;
3574
3575         token->peer_pk_hash_known = pubkey_hash != NULL;
3576         if (pubkey_hash)
3577                 os_memcpy(token->pubkey_hash, pubkey_hash,
3578                           WPS_OOB_PUBKEY_HASH_LEN);
3579         token->pw_id = pw_id;
3580         token->pk_hash_provided_oob = pk_hash_provided_oob;
3581         if (dev_pw) {
3582                 wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3583                                            sizeof(token->dev_pw),
3584                                            dev_pw, dev_pw_len);
3585                 token->dev_pw_len = dev_pw_len * 2;
3586         }
3587
3588         dl_list_add(&reg->nfc_pw_tokens, &token->list);
3589
3590         reg->selected_registrar = 1;
3591         reg->pbc = 0;
3592         wps_registrar_add_authorized_mac(reg,
3593                                          (u8 *) "\xff\xff\xff\xff\xff\xff");
3594         wps_registrar_selected_registrar_changed(reg, pw_id);
3595         eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3596         eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3597                                wps_registrar_set_selected_timeout,
3598                                reg, NULL);
3599
3600         wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3601                    pw_id);
3602
3603         return 0;
3604 }
3605
3606
3607 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3608                                          const u8 *oob_dev_pw,
3609                                          size_t oob_dev_pw_len)
3610 {
3611         const u8 *pos, *hash, *dev_pw;
3612         u16 id;
3613         size_t dev_pw_len;
3614
3615         if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3616             oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3617             WPS_OOB_DEVICE_PASSWORD_LEN)
3618                 return -1;
3619
3620         hash = oob_dev_pw;
3621         pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3622         id = WPA_GET_BE16(pos);
3623         dev_pw = pos + 2;
3624         dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3625
3626         wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3627                    id);
3628
3629         wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3630                     hash, WPS_OOB_PUBKEY_HASH_LEN);
3631         wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3632
3633         return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3634                                               dev_pw_len, 0);
3635 }
3636
3637
3638 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3639                                        struct wps_nfc_pw_token *token)
3640 {
3641         wps_registrar_remove_authorized_mac(reg,
3642                                             (u8 *) "\xff\xff\xff\xff\xff\xff");
3643         wps_registrar_selected_registrar_changed(reg, 0);
3644
3645         /*
3646          * Free the NFC password token if it was used only for a single protocol
3647          * run. The static handover case uses the same password token multiple
3648          * times, so do not free that case here.
3649          */
3650         if (token->peer_pk_hash_known)
3651                 os_free(token);
3652 }
3653
3654 #endif /* CONFIG_WPS_NFC */