wps_registrar.c revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2009, 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 29struct wps_uuid_pin { 30 struct dl_list list; 31 u8 uuid[WPS_UUID_LEN]; 32 int wildcard_uuid; 33 u8 *pin; 34 size_t pin_len; 35#define PIN_LOCKED BIT(0) 36#define PIN_EXPIRES BIT(1) 37 int flags; 38 struct os_time expiration; 39 u8 enrollee_addr[ETH_ALEN]; 40}; 41 42 43static void wps_free_pin(struct wps_uuid_pin *pin) 44{ 45 os_free(pin->pin); 46 os_free(pin); 47} 48 49 50static void wps_remove_pin(struct wps_uuid_pin *pin) 51{ 52 dl_list_del(&pin->list); 53 wps_free_pin(pin); 54} 55 56 57static void wps_free_pins(struct dl_list *pins) 58{ 59 struct wps_uuid_pin *pin, *prev; 60 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 61 wps_remove_pin(pin); 62} 63 64 65struct wps_pbc_session { 66 struct wps_pbc_session *next; 67 u8 addr[ETH_ALEN]; 68 u8 uuid_e[WPS_UUID_LEN]; 69 struct os_time timestamp; 70}; 71 72 73static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 74{ 75 struct wps_pbc_session *prev; 76 77 while (pbc) { 78 prev = pbc; 79 pbc = pbc->next; 80 os_free(prev); 81 } 82} 83 84 85struct wps_registrar_device { 86 struct wps_registrar_device *next; 87 struct wps_device_data dev; 88 u8 uuid[WPS_UUID_LEN]; 89}; 90 91 92struct wps_registrar { 93 struct wps_context *wps; 94 95 int pbc; 96 int selected_registrar; 97 98 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk, 99 size_t psk_len); 100 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 101 struct wpabuf *probe_resp_ie); 102 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 103 const struct wps_device_data *dev); 104 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 105 const u8 *uuid_e); 106 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 107 u16 sel_reg_config_methods); 108 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 109 const u8 *pri_dev_type, u16 config_methods, 110 u16 dev_password_id, u8 request_type, 111 const char *dev_name); 112 void *cb_ctx; 113 114 struct dl_list pins; 115 struct wps_pbc_session *pbc_sessions; 116 117 int skip_cred_build; 118 struct wpabuf *extra_cred; 119 int disable_auto_conf; 120 int sel_reg_union; 121 int sel_reg_dev_password_id_override; 122 int sel_reg_config_methods_override; 123 int static_wep_only; 124 int dualband; 125 126 struct wps_registrar_device *devices; 127 128 int force_pbc_overlap; 129 130 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 131 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 132 133 u8 p2p_dev_addr[ETH_ALEN]; 134}; 135 136 137static int wps_set_ie(struct wps_registrar *reg); 138static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 139static void wps_registrar_set_selected_timeout(void *eloop_ctx, 140 void *timeout_ctx); 141 142 143static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 144 const u8 *addr) 145{ 146 int i; 147 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 148 MAC2STR(addr)); 149 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 150 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 151 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 152 "already in the list"); 153 return; /* already in list */ 154 } 155 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 156 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 157 ETH_ALEN); 158 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 159 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 160 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 161} 162 163 164static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 165 const u8 *addr) 166{ 167 int i; 168 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 169 MAC2STR(addr)); 170 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 171 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 172 break; 173 } 174 if (i == WPS_MAX_AUTHORIZED_MACS) { 175 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 176 "list"); 177 return; /* not in the list */ 178 } 179 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 180 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 181 ETH_ALEN); 182 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 183 ETH_ALEN); 184 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 185 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 186} 187 188 189static void wps_free_devices(struct wps_registrar_device *dev) 190{ 191 struct wps_registrar_device *prev; 192 193 while (dev) { 194 prev = dev; 195 dev = dev->next; 196 wps_device_data_free(&prev->dev); 197 os_free(prev); 198 } 199} 200 201 202static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 203 const u8 *addr) 204{ 205 struct wps_registrar_device *dev; 206 207 for (dev = reg->devices; dev; dev = dev->next) { 208 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 209 return dev; 210 } 211 return NULL; 212} 213 214 215static void wps_device_clone_data(struct wps_device_data *dst, 216 struct wps_device_data *src) 217{ 218 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 219 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 220 221#define WPS_STRDUP(n) \ 222 os_free(dst->n); \ 223 dst->n = src->n ? os_strdup(src->n) : NULL 224 225 WPS_STRDUP(device_name); 226 WPS_STRDUP(manufacturer); 227 WPS_STRDUP(model_name); 228 WPS_STRDUP(model_number); 229 WPS_STRDUP(serial_number); 230#undef WPS_STRDUP 231} 232 233 234int wps_device_store(struct wps_registrar *reg, 235 struct wps_device_data *dev, const u8 *uuid) 236{ 237 struct wps_registrar_device *d; 238 239 d = wps_device_get(reg, dev->mac_addr); 240 if (d == NULL) { 241 d = os_zalloc(sizeof(*d)); 242 if (d == NULL) 243 return -1; 244 d->next = reg->devices; 245 reg->devices = d; 246 } 247 248 wps_device_clone_data(&d->dev, dev); 249 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 250 251 return 0; 252} 253 254 255static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 256 const u8 *addr, const u8 *uuid_e) 257{ 258 struct wps_pbc_session *pbc, *prev = NULL; 259 struct os_time now; 260 261 os_get_time(&now); 262 263 pbc = reg->pbc_sessions; 264 while (pbc) { 265 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 266 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 267 if (prev) 268 prev->next = pbc->next; 269 else 270 reg->pbc_sessions = pbc->next; 271 break; 272 } 273 prev = pbc; 274 pbc = pbc->next; 275 } 276 277 if (!pbc) { 278 pbc = os_zalloc(sizeof(*pbc)); 279 if (pbc == NULL) 280 return; 281 os_memcpy(pbc->addr, addr, ETH_ALEN); 282 if (uuid_e) 283 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 284 } 285 286 pbc->next = reg->pbc_sessions; 287 reg->pbc_sessions = pbc; 288 pbc->timestamp = now; 289 290 /* remove entries that have timed out */ 291 prev = pbc; 292 pbc = pbc->next; 293 294 while (pbc) { 295 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 296 prev->next = NULL; 297 wps_free_pbc_sessions(pbc); 298 break; 299 } 300 prev = pbc; 301 pbc = pbc->next; 302 } 303} 304 305 306static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 307 const u8 *uuid_e, 308 const u8 *p2p_dev_addr) 309{ 310 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 311 312 pbc = reg->pbc_sessions; 313 while (pbc) { 314 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 315 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 316 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 317 0)) { 318 if (prev) 319 prev->next = pbc->next; 320 else 321 reg->pbc_sessions = pbc->next; 322 tmp = pbc; 323 pbc = pbc->next; 324 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 325 "addr=" MACSTR, MAC2STR(tmp->addr)); 326 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 327 tmp->uuid_e, WPS_UUID_LEN); 328 os_free(tmp); 329 continue; 330 } 331 prev = pbc; 332 pbc = pbc->next; 333 } 334} 335 336 337int wps_registrar_pbc_overlap(struct wps_registrar *reg, 338 const u8 *addr, const u8 *uuid_e) 339{ 340 int count = 0; 341 struct wps_pbc_session *pbc; 342 struct wps_pbc_session *first = NULL; 343 struct os_time now; 344 345 os_get_time(&now); 346 347 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 348 349 if (uuid_e) { 350 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 351 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 352 uuid_e, WPS_UUID_LEN); 353 count++; 354 } 355 356 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 357 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 358 MAC2STR(pbc->addr)); 359 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 360 pbc->uuid_e, WPS_UUID_LEN); 361 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 362 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has " 363 "expired"); 364 break; 365 } 366 if (first && 367 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 368 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 369 continue; /* same Enrollee */ 370 } 371 if (uuid_e == NULL || 372 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 373 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 374 count++; 375 } 376 if (first == NULL) 377 first = pbc; 378 } 379 380 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 381 382 return count > 1 ? 1 : 0; 383} 384 385 386static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 387{ 388 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 389 wps->wps_state); 390 wpabuf_put_be16(msg, ATTR_WPS_STATE); 391 wpabuf_put_be16(msg, 1); 392 wpabuf_put_u8(msg, wps->wps_state); 393 return 0; 394} 395 396 397#ifdef CONFIG_WPS_UPNP 398static void wps_registrar_free_pending_m2(struct wps_context *wps) 399{ 400 struct upnp_pending_message *p, *p2, *prev = NULL; 401 p = wps->upnp_msgs; 402 while (p) { 403 if (p->type == WPS_M2 || p->type == WPS_M2D) { 404 if (prev == NULL) 405 wps->upnp_msgs = p->next; 406 else 407 prev->next = p->next; 408 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 409 p2 = p; 410 p = p->next; 411 wpabuf_free(p2->msg); 412 os_free(p2); 413 continue; 414 } 415 prev = p; 416 p = p->next; 417 } 418} 419#endif /* CONFIG_WPS_UPNP */ 420 421 422static int wps_build_ap_setup_locked(struct wps_context *wps, 423 struct wpabuf *msg) 424{ 425 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 426 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 427 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 428 wpabuf_put_be16(msg, 1); 429 wpabuf_put_u8(msg, 1); 430 } 431 return 0; 432} 433 434 435static int wps_build_selected_registrar(struct wps_registrar *reg, 436 struct wpabuf *msg) 437{ 438 if (!reg->sel_reg_union) 439 return 0; 440 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 441 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 442 wpabuf_put_be16(msg, 1); 443 wpabuf_put_u8(msg, 1); 444 return 0; 445} 446 447 448static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 449 struct wpabuf *msg) 450{ 451 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 452 if (!reg->sel_reg_union) 453 return 0; 454 if (reg->sel_reg_dev_password_id_override >= 0) 455 id = reg->sel_reg_dev_password_id_override; 456 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 457 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 458 wpabuf_put_be16(msg, 2); 459 wpabuf_put_be16(msg, id); 460 return 0; 461} 462 463 464static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 465 struct wpabuf *msg) 466{ 467 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 468 if (!reg->sel_reg_union) 469 return 0; 470 if (reg->sel_reg_dev_password_id_override >= 0) 471 id = reg->sel_reg_dev_password_id_override; 472 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 473 return 0; 474 return wps_build_uuid_e(msg, reg->wps->uuid); 475} 476 477 478static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 479{ 480 *methods |= WPS_CONFIG_PUSHBUTTON; 481#ifdef CONFIG_WPS2 482 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) 483 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 484 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) 485 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 486 if (!(*methods & (WPS_CONFIG_VIRT_PUSHBUTTON | 487 WPS_CONFIG_PHY_PUSHBUTTON))) { 488 /* 489 * Required to include virtual/physical flag, but we were not 490 * configured with push button type, so have to default to one 491 * of them. 492 */ 493 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 494 } 495#endif /* CONFIG_WPS2 */ 496} 497 498 499static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 500 struct wpabuf *msg) 501{ 502 u16 methods; 503 if (!reg->sel_reg_union) 504 return 0; 505 methods = reg->wps->config_methods; 506 methods &= ~WPS_CONFIG_PUSHBUTTON; 507#ifdef CONFIG_WPS2 508 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 509 WPS_CONFIG_PHY_PUSHBUTTON); 510#endif /* CONFIG_WPS2 */ 511 if (reg->pbc) 512 wps_set_pushbutton(&methods, reg->wps->config_methods); 513 if (reg->sel_reg_config_methods_override >= 0) 514 methods = reg->sel_reg_config_methods_override; 515 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 516 methods); 517 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 518 wpabuf_put_be16(msg, 2); 519 wpabuf_put_be16(msg, methods); 520 return 0; 521} 522 523 524static int wps_build_probe_config_methods(struct wps_registrar *reg, 525 struct wpabuf *msg) 526{ 527 u16 methods; 528 /* 529 * These are the methods that the AP supports as an Enrollee for adding 530 * external Registrars. 531 */ 532 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 533#ifdef CONFIG_WPS2 534 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 535 WPS_CONFIG_PHY_PUSHBUTTON); 536#endif /* CONFIG_WPS2 */ 537 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 538 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 539 wpabuf_put_be16(msg, 2); 540 wpabuf_put_be16(msg, methods); 541 return 0; 542} 543 544 545static int wps_build_config_methods_r(struct wps_registrar *reg, 546 struct wpabuf *msg) 547{ 548 return wps_build_config_methods(msg, reg->wps->config_methods); 549} 550 551 552const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 553{ 554 *count = 0; 555 556#ifdef CONFIG_WPS2 557 while (*count < WPS_MAX_AUTHORIZED_MACS) { 558 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 559 break; 560 (*count)++; 561 } 562#endif /* CONFIG_WPS2 */ 563 564 return (const u8 *) reg->authorized_macs_union; 565} 566 567 568/** 569 * wps_registrar_init - Initialize WPS Registrar data 570 * @wps: Pointer to longterm WPS context 571 * @cfg: Registrar configuration 572 * Returns: Pointer to allocated Registrar data or %NULL on failure 573 * 574 * This function is used to initialize WPS Registrar functionality. It can be 575 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 576 * runs (e.g., when run as an internal Registrar in an AP). Caller is 577 * responsible for freeing the returned data with wps_registrar_deinit() when 578 * Registrar functionality is not needed anymore. 579 */ 580struct wps_registrar * 581wps_registrar_init(struct wps_context *wps, 582 const struct wps_registrar_config *cfg) 583{ 584 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 585 if (reg == NULL) 586 return NULL; 587 588 dl_list_init(®->pins); 589 reg->wps = wps; 590 reg->new_psk_cb = cfg->new_psk_cb; 591 reg->set_ie_cb = cfg->set_ie_cb; 592 reg->pin_needed_cb = cfg->pin_needed_cb; 593 reg->reg_success_cb = cfg->reg_success_cb; 594 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 595 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 596 reg->cb_ctx = cfg->cb_ctx; 597 reg->skip_cred_build = cfg->skip_cred_build; 598 if (cfg->extra_cred) { 599 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 600 cfg->extra_cred_len); 601 if (reg->extra_cred == NULL) { 602 os_free(reg); 603 return NULL; 604 } 605 } 606 reg->disable_auto_conf = cfg->disable_auto_conf; 607 reg->sel_reg_dev_password_id_override = -1; 608 reg->sel_reg_config_methods_override = -1; 609 reg->static_wep_only = cfg->static_wep_only; 610 reg->dualband = cfg->dualband; 611 612 if (wps_set_ie(reg)) { 613 wps_registrar_deinit(reg); 614 return NULL; 615 } 616 617 return reg; 618} 619 620 621/** 622 * wps_registrar_deinit - Deinitialize WPS Registrar data 623 * @reg: Registrar data from wps_registrar_init() 624 */ 625void wps_registrar_deinit(struct wps_registrar *reg) 626{ 627 if (reg == NULL) 628 return; 629 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 630 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 631 wps_free_pins(®->pins); 632 wps_free_pbc_sessions(reg->pbc_sessions); 633 wpabuf_free(reg->extra_cred); 634 wps_free_devices(reg->devices); 635 os_free(reg); 636} 637 638 639/** 640 * wps_registrar_add_pin - Configure a new PIN for Registrar 641 * @reg: Registrar data from wps_registrar_init() 642 * @addr: Enrollee MAC address or %NULL if not known 643 * @uuid: UUID-E or %NULL for wildcard (any UUID) 644 * @pin: PIN (Device Password) 645 * @pin_len: Length of pin in octets 646 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 647 * Returns: 0 on success, -1 on failure 648 */ 649int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 650 const u8 *uuid, const u8 *pin, size_t pin_len, 651 int timeout) 652{ 653 struct wps_uuid_pin *p; 654 655 p = os_zalloc(sizeof(*p)); 656 if (p == NULL) 657 return -1; 658 if (addr) 659 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 660 if (uuid == NULL) 661 p->wildcard_uuid = 1; 662 else 663 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 664 p->pin = os_malloc(pin_len); 665 if (p->pin == NULL) { 666 os_free(p); 667 return -1; 668 } 669 os_memcpy(p->pin, pin, pin_len); 670 p->pin_len = pin_len; 671 672 if (timeout) { 673 p->flags |= PIN_EXPIRES; 674 os_get_time(&p->expiration); 675 p->expiration.sec += timeout; 676 } 677 678 dl_list_add(®->pins, &p->list); 679 680 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 681 timeout); 682 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 683 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 684 reg->selected_registrar = 1; 685 reg->pbc = 0; 686 if (addr) 687 wps_registrar_add_authorized_mac(reg, addr); 688 else 689 wps_registrar_add_authorized_mac( 690 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 691 wps_registrar_selected_registrar_changed(reg); 692 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 693 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 694 wps_registrar_set_selected_timeout, 695 reg, NULL); 696 697 return 0; 698} 699 700 701static void wps_registrar_remove_pin(struct wps_registrar *reg, 702 struct wps_uuid_pin *pin) 703{ 704 u8 *addr; 705 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 706 707 if (is_zero_ether_addr(pin->enrollee_addr)) 708 addr = bcast; 709 else 710 addr = pin->enrollee_addr; 711 wps_registrar_remove_authorized_mac(reg, addr); 712 wps_remove_pin(pin); 713 wps_registrar_selected_registrar_changed(reg); 714} 715 716 717static void wps_registrar_expire_pins(struct wps_registrar *reg) 718{ 719 struct wps_uuid_pin *pin, *prev; 720 struct os_time now; 721 722 os_get_time(&now); 723 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 724 { 725 if ((pin->flags & PIN_EXPIRES) && 726 os_time_before(&pin->expiration, &now)) { 727 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 728 pin->uuid, WPS_UUID_LEN); 729 wps_registrar_remove_pin(reg, pin); 730 } 731 } 732} 733 734 735/** 736 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 737 * @reg: Registrar data from wps_registrar_init() 738 * Returns: 0 on success, -1 if not wildcard PIN is enabled 739 */ 740static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg) 741{ 742 struct wps_uuid_pin *pin, *prev; 743 744 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 745 { 746 if (pin->wildcard_uuid) { 747 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 748 pin->uuid, WPS_UUID_LEN); 749 wps_registrar_remove_pin(reg, pin); 750 return 0; 751 } 752 } 753 754 return -1; 755} 756 757 758/** 759 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 760 * @reg: Registrar data from wps_registrar_init() 761 * @uuid: UUID-E 762 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 763 */ 764int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 765{ 766 struct wps_uuid_pin *pin, *prev; 767 768 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 769 { 770 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 771 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 772 pin->uuid, WPS_UUID_LEN); 773 wps_registrar_remove_pin(reg, pin); 774 return 0; 775 } 776 } 777 778 return -1; 779} 780 781 782static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 783 const u8 *uuid, size_t *pin_len) 784{ 785 struct wps_uuid_pin *pin, *found = NULL; 786 787 wps_registrar_expire_pins(reg); 788 789 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 790 if (!pin->wildcard_uuid && 791 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 792 found = pin; 793 break; 794 } 795 } 796 797 if (!found) { 798 /* Check for wildcard UUIDs since none of the UUID-specific 799 * PINs matched */ 800 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 801 if (pin->wildcard_uuid == 1 || 802 pin->wildcard_uuid == 2) { 803 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 804 "PIN. Assigned it for this UUID-E"); 805 pin->wildcard_uuid++; 806 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 807 found = pin; 808 break; 809 } 810 } 811 } 812 813 if (!found) 814 return NULL; 815 816 /* 817 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 818 * that could otherwise avoid PIN invalidations. 819 */ 820 if (found->flags & PIN_LOCKED) { 821 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 822 "allow concurrent re-use"); 823 return NULL; 824 } 825 *pin_len = found->pin_len; 826 found->flags |= PIN_LOCKED; 827 return found->pin; 828} 829 830 831/** 832 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 833 * @reg: Registrar data from wps_registrar_init() 834 * @uuid: UUID-E 835 * Returns: 0 on success, -1 on failure 836 * 837 * PINs are locked to enforce only one concurrent use. This function unlocks a 838 * PIN to allow it to be used again. If the specified PIN was configured using 839 * a wildcard UUID, it will be removed instead of allowing multiple uses. 840 */ 841int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 842{ 843 struct wps_uuid_pin *pin; 844 845 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 846 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 847 if (pin->wildcard_uuid == 3) { 848 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 849 "wildcard PIN"); 850 return wps_registrar_invalidate_pin(reg, uuid); 851 } 852 pin->flags &= ~PIN_LOCKED; 853 return 0; 854 } 855 } 856 857 return -1; 858} 859 860 861static void wps_registrar_stop_pbc(struct wps_registrar *reg) 862{ 863 reg->selected_registrar = 0; 864 reg->pbc = 0; 865 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 866 wps_registrar_remove_authorized_mac(reg, 867 (u8 *) "\xff\xff\xff\xff\xff\xff"); 868 wps_registrar_selected_registrar_changed(reg); 869} 870 871 872static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 873{ 874 struct wps_registrar *reg = eloop_ctx; 875 876 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 877 wps_pbc_timeout_event(reg->wps); 878 wps_registrar_stop_pbc(reg); 879} 880 881 882/** 883 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 884 * @reg: Registrar data from wps_registrar_init() 885 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 886 * indicates no such filtering 887 * Returns: 0 on success, -1 on failure, -2 on session overlap 888 * 889 * This function is called on an AP when a push button is pushed to activate 890 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 891 * or when a PBC registration is completed. If more than one Enrollee in active 892 * PBC mode has been detected during the monitor time (previous 2 minutes), the 893 * PBC mode is not activated and -2 is returned to indicate session overlap. 894 * This is skipped if a specific Enrollee is selected. 895 */ 896int wps_registrar_button_pushed(struct wps_registrar *reg, 897 const u8 *p2p_dev_addr) 898{ 899 if (p2p_dev_addr == NULL && 900 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 901 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 902 "mode"); 903 wps_pbc_overlap_event(reg->wps); 904 return -2; 905 } 906 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 907 reg->force_pbc_overlap = 0; 908 reg->selected_registrar = 1; 909 reg->pbc = 1; 910 if (p2p_dev_addr) 911 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 912 else 913 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 914 wps_registrar_add_authorized_mac(reg, 915 (u8 *) "\xff\xff\xff\xff\xff\xff"); 916 wps_registrar_selected_registrar_changed(reg); 917 918 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 919 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 920 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 921 reg, NULL); 922 return 0; 923} 924 925 926static void wps_registrar_pbc_completed(struct wps_registrar *reg) 927{ 928 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 929 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 930 wps_registrar_stop_pbc(reg); 931} 932 933 934static void wps_registrar_pin_completed(struct wps_registrar *reg) 935{ 936 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 937 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 938 reg->selected_registrar = 0; 939 wps_registrar_selected_registrar_changed(reg); 940} 941 942 943void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e) 944{ 945 if (registrar->pbc) { 946 wps_registrar_remove_pbc_session(registrar, 947 uuid_e, NULL); 948 wps_registrar_pbc_completed(registrar); 949 } else { 950 wps_registrar_pin_completed(registrar); 951 } 952} 953 954 955int wps_registrar_wps_cancel(struct wps_registrar *reg) 956{ 957 if (reg->pbc) { 958 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 959 wps_registrar_pbc_timeout(reg, NULL); 960 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 961 return 1; 962 } else if (reg->selected_registrar) { 963 /* PIN Method */ 964 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 965 wps_registrar_pin_completed(reg); 966 wps_registrar_invalidate_wildcard_pin(reg); 967 return 1; 968 } 969 return 0; 970} 971 972 973/** 974 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 975 * @reg: Registrar data from wps_registrar_init() 976 * @addr: MAC address of the Probe Request sender 977 * @wps_data: WPS IE contents 978 * 979 * This function is called on an AP when a Probe Request with WPS IE is 980 * received. This is used to track PBC mode use and to detect possible overlap 981 * situation with other WPS APs. 982 */ 983void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 984 const struct wpabuf *wps_data, 985 int p2p_wildcard) 986{ 987 struct wps_parse_attr attr; 988 989 wpa_hexdump_buf(MSG_MSGDUMP, 990 "WPS: Probe Request with WPS data received", 991 wps_data); 992 993 if (wps_parse_msg(wps_data, &attr) < 0) 994 return; 995 996 if (attr.config_methods == NULL) { 997 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 998 "Probe Request"); 999 return; 1000 } 1001 1002 if (attr.dev_password_id == NULL) { 1003 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1004 "in Probe Request"); 1005 return; 1006 } 1007 1008 if (reg->enrollee_seen_cb && attr.uuid_e && 1009 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1010 char *dev_name = NULL; 1011 if (attr.dev_name) { 1012 dev_name = os_zalloc(attr.dev_name_len + 1); 1013 if (dev_name) { 1014 os_memcpy(dev_name, attr.dev_name, 1015 attr.dev_name_len); 1016 } 1017 } 1018 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1019 attr.primary_dev_type, 1020 WPA_GET_BE16(attr.config_methods), 1021 WPA_GET_BE16(attr.dev_password_id), 1022 *attr.request_type, dev_name); 1023 os_free(dev_name); 1024 } 1025 1026 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1027 return; /* Not PBC */ 1028 1029 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1030 MACSTR, MAC2STR(addr)); 1031 if (attr.uuid_e == NULL) { 1032 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1033 "UUID-E included"); 1034 return; 1035 } 1036 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1037 WPS_UUID_LEN); 1038 1039 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1040 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1041 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1042 reg->force_pbc_overlap = 1; 1043 wps_pbc_overlap_event(reg->wps); 1044 } 1045} 1046 1047 1048static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1049 const u8 *psk, size_t psk_len) 1050{ 1051 if (reg->new_psk_cb == NULL) 1052 return 0; 1053 1054 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len); 1055} 1056 1057 1058static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1059 const struct wps_device_data *dev) 1060{ 1061 if (reg->pin_needed_cb == NULL) 1062 return; 1063 1064 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1065} 1066 1067 1068static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1069 const u8 *uuid_e) 1070{ 1071 if (reg->reg_success_cb == NULL) 1072 return; 1073 1074 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e); 1075} 1076 1077 1078static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1079 struct wpabuf *probe_resp_ie) 1080{ 1081 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1082} 1083 1084 1085static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1086{ 1087 u16 methods = 0; 1088 if (reg->set_sel_reg_cb == NULL) 1089 return; 1090 1091 if (reg->selected_registrar) { 1092 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1093#ifdef CONFIG_WPS2 1094 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1095 WPS_CONFIG_PHY_PUSHBUTTON); 1096#endif /* CONFIG_WPS2 */ 1097 if (reg->pbc) 1098 wps_set_pushbutton(&methods, reg->wps->config_methods); 1099 } 1100 1101 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1102 "config_methods=0x%x pbc=%d methods=0x%x", 1103 reg->selected_registrar, reg->wps->config_methods, 1104 reg->pbc, methods); 1105 1106 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1107 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1108 methods); 1109} 1110 1111 1112static int wps_set_ie(struct wps_registrar *reg) 1113{ 1114 struct wpabuf *beacon; 1115 struct wpabuf *probe; 1116 const u8 *auth_macs; 1117 size_t count; 1118 size_t vendor_len = 0; 1119 int i; 1120 1121 if (reg->set_ie_cb == NULL) 1122 return 0; 1123 1124 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1125 if (reg->wps->dev.vendor_ext[i]) { 1126 vendor_len += 2 + 2; 1127 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1128 } 1129 } 1130 1131 beacon = wpabuf_alloc(400 + vendor_len); 1132 if (beacon == NULL) 1133 return -1; 1134 probe = wpabuf_alloc(500 + vendor_len); 1135 if (probe == NULL) { 1136 wpabuf_free(beacon); 1137 return -1; 1138 } 1139 1140 auth_macs = wps_authorized_macs(reg, &count); 1141 1142 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1143 1144 if (wps_build_version(beacon) || 1145 wps_build_wps_state(reg->wps, beacon) || 1146 wps_build_ap_setup_locked(reg->wps, beacon) || 1147 wps_build_selected_registrar(reg, beacon) || 1148 wps_build_sel_reg_dev_password_id(reg, beacon) || 1149 wps_build_sel_reg_config_methods(reg, beacon) || 1150 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1151 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon)) || 1152 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1153 wps_build_vendor_ext(®->wps->dev, beacon)) { 1154 wpabuf_free(beacon); 1155 wpabuf_free(probe); 1156 return -1; 1157 } 1158 1159#ifdef CONFIG_P2P 1160 if (wps_build_dev_name(®->wps->dev, beacon) || 1161 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1162 wpabuf_free(beacon); 1163 wpabuf_free(probe); 1164 return -1; 1165 } 1166#endif /* CONFIG_P2P */ 1167 1168 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1169 1170 if (wps_build_version(probe) || 1171 wps_build_wps_state(reg->wps, probe) || 1172 wps_build_ap_setup_locked(reg->wps, probe) || 1173 wps_build_selected_registrar(reg, probe) || 1174 wps_build_sel_reg_dev_password_id(reg, probe) || 1175 wps_build_sel_reg_config_methods(reg, probe) || 1176 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1177 WPS_RESP_REGISTRAR) || 1178 wps_build_uuid_e(probe, reg->wps->uuid) || 1179 wps_build_device_attrs(®->wps->dev, probe) || 1180 wps_build_probe_config_methods(reg, probe) || 1181 wps_build_rf_bands(®->wps->dev, probe) || 1182 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1183 wps_build_vendor_ext(®->wps->dev, probe)) { 1184 wpabuf_free(beacon); 1185 wpabuf_free(probe); 1186 return -1; 1187 } 1188 1189 beacon = wps_ie_encapsulate(beacon); 1190 probe = wps_ie_encapsulate(probe); 1191 1192 if (!beacon || !probe) { 1193 wpabuf_free(beacon); 1194 wpabuf_free(probe); 1195 return -1; 1196 } 1197 1198 if (reg->static_wep_only) { 1199 /* 1200 * Windows XP and Vista clients can get confused about 1201 * EAP-Identity/Request when they probe the network with 1202 * EAPOL-Start. In such a case, they may assume the network is 1203 * using IEEE 802.1X and prompt user for a certificate while 1204 * the correct (non-WPS) behavior would be to ask for the 1205 * static WEP key. As a workaround, use Microsoft Provisioning 1206 * IE to advertise that legacy 802.1X is not supported. 1207 */ 1208 const u8 ms_wps[7] = { 1209 WLAN_EID_VENDOR_SPECIFIC, 5, 1210 /* Microsoft Provisioning IE (00:50:f2:5) */ 1211 0x00, 0x50, 0xf2, 5, 1212 0x00 /* no legacy 802.1X or MS WPS */ 1213 }; 1214 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1215 "into Beacon/Probe Response frames"); 1216 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1217 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1218 } 1219 1220 return wps_cb_set_ie(reg, beacon, probe); 1221} 1222 1223 1224static int wps_get_dev_password(struct wps_data *wps) 1225{ 1226 const u8 *pin; 1227 size_t pin_len = 0; 1228 1229 os_free(wps->dev_password); 1230 wps->dev_password = NULL; 1231 1232 if (wps->pbc) { 1233 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1234 pin = (const u8 *) "00000000"; 1235 pin_len = 8; 1236 } else { 1237 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1238 &pin_len); 1239 } 1240 if (pin == NULL) { 1241 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1242 "the Enrollee"); 1243 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1244 &wps->peer_dev); 1245 return -1; 1246 } 1247 1248 wps->dev_password = os_malloc(pin_len); 1249 if (wps->dev_password == NULL) 1250 return -1; 1251 os_memcpy(wps->dev_password, pin, pin_len); 1252 wps->dev_password_len = pin_len; 1253 1254 return 0; 1255} 1256 1257 1258static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1259{ 1260 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1261 wpabuf_put_be16(msg, ATTR_UUID_R); 1262 wpabuf_put_be16(msg, WPS_UUID_LEN); 1263 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1264 return 0; 1265} 1266 1267 1268static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1269{ 1270 u8 *hash; 1271 const u8 *addr[4]; 1272 size_t len[4]; 1273 1274 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1275 return -1; 1276 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1277 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1278 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1279 1280 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1281 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1282 "R-Hash derivation"); 1283 return -1; 1284 } 1285 1286 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1287 wpabuf_put_be16(msg, ATTR_R_HASH1); 1288 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1289 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1290 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1291 addr[0] = wps->snonce; 1292 len[0] = WPS_SECRET_NONCE_LEN; 1293 addr[1] = wps->psk1; 1294 len[1] = WPS_PSK_LEN; 1295 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1296 len[2] = wpabuf_len(wps->dh_pubkey_e); 1297 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1298 len[3] = wpabuf_len(wps->dh_pubkey_r); 1299 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1300 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1301 1302 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1303 wpabuf_put_be16(msg, ATTR_R_HASH2); 1304 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1305 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1306 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1307 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1308 addr[1] = wps->psk2; 1309 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1310 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1311 1312 return 0; 1313} 1314 1315 1316static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1317{ 1318 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1319 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1320 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1321 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1322 return 0; 1323} 1324 1325 1326static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1327{ 1328 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1329 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1330 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1331 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1332 WPS_SECRET_NONCE_LEN); 1333 return 0; 1334} 1335 1336 1337static int wps_build_cred_network_idx(struct wpabuf *msg, 1338 const struct wps_credential *cred) 1339{ 1340 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1341 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1342 wpabuf_put_be16(msg, 1); 1343 wpabuf_put_u8(msg, 1); 1344 return 0; 1345} 1346 1347 1348static int wps_build_cred_ssid(struct wpabuf *msg, 1349 const struct wps_credential *cred) 1350{ 1351 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1352 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1353 cred->ssid, cred->ssid_len); 1354 wpabuf_put_be16(msg, ATTR_SSID); 1355 wpabuf_put_be16(msg, cred->ssid_len); 1356 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1357 return 0; 1358} 1359 1360 1361static int wps_build_cred_auth_type(struct wpabuf *msg, 1362 const struct wps_credential *cred) 1363{ 1364 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1365 cred->auth_type); 1366 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1367 wpabuf_put_be16(msg, 2); 1368 wpabuf_put_be16(msg, cred->auth_type); 1369 return 0; 1370} 1371 1372 1373static int wps_build_cred_encr_type(struct wpabuf *msg, 1374 const struct wps_credential *cred) 1375{ 1376 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1377 cred->encr_type); 1378 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1379 wpabuf_put_be16(msg, 2); 1380 wpabuf_put_be16(msg, cred->encr_type); 1381 return 0; 1382} 1383 1384 1385static int wps_build_cred_network_key(struct wpabuf *msg, 1386 const struct wps_credential *cred) 1387{ 1388 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1389 (int) cred->key_len); 1390 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1391 cred->key, cred->key_len); 1392 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1393 wpabuf_put_be16(msg, cred->key_len); 1394 wpabuf_put_data(msg, cred->key, cred->key_len); 1395 return 0; 1396} 1397 1398 1399static int wps_build_cred_mac_addr(struct wpabuf *msg, 1400 const struct wps_credential *cred) 1401{ 1402 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")", 1403 MAC2STR(cred->mac_addr)); 1404 wpabuf_put_be16(msg, ATTR_MAC_ADDR); 1405 wpabuf_put_be16(msg, ETH_ALEN); 1406 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN); 1407 return 0; 1408} 1409 1410 1411static int wps_build_credential(struct wpabuf *msg, 1412 const struct wps_credential *cred) 1413{ 1414 if (wps_build_cred_network_idx(msg, cred) || 1415 wps_build_cred_ssid(msg, cred) || 1416 wps_build_cred_auth_type(msg, cred) || 1417 wps_build_cred_encr_type(msg, cred) || 1418 wps_build_cred_network_key(msg, cred) || 1419 wps_build_cred_mac_addr(msg, cred)) 1420 return -1; 1421 return 0; 1422} 1423 1424 1425int wps_build_credential_wrap(struct wpabuf *msg, 1426 const struct wps_credential *cred) 1427{ 1428 struct wpabuf *wbuf; 1429 wbuf = wpabuf_alloc(200); 1430 if (wbuf == NULL) 1431 return -1; 1432 if (wps_build_credential(wbuf, cred)) { 1433 wpabuf_free(wbuf); 1434 return -1; 1435 } 1436 wpabuf_put_be16(msg, ATTR_CRED); 1437 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1438 wpabuf_put_buf(msg, wbuf); 1439 wpabuf_free(wbuf); 1440 return 0; 1441} 1442 1443 1444int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1445{ 1446 struct wpabuf *cred; 1447 1448 if (wps->wps->registrar->skip_cred_build) 1449 goto skip_cred_build; 1450 1451 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1452 if (wps->use_cred) { 1453 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1454 goto use_provided; 1455 } 1456 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1457 1458 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1459 wps->cred.ssid_len = wps->wps->ssid_len; 1460 1461 /* Select the best authentication and encryption type */ 1462 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1463 wps->auth_type = WPS_AUTH_WPA2PSK; 1464 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1465 wps->auth_type = WPS_AUTH_WPAPSK; 1466 else if (wps->auth_type & WPS_AUTH_OPEN) 1467 wps->auth_type = WPS_AUTH_OPEN; 1468 else if (wps->auth_type & WPS_AUTH_SHARED) 1469 wps->auth_type = WPS_AUTH_SHARED; 1470 else { 1471 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1472 wps->auth_type); 1473 return -1; 1474 } 1475 wps->cred.auth_type = wps->auth_type; 1476 1477 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1478 wps->auth_type == WPS_AUTH_WPAPSK) { 1479 if (wps->encr_type & WPS_ENCR_AES) 1480 wps->encr_type = WPS_ENCR_AES; 1481 else if (wps->encr_type & WPS_ENCR_TKIP) 1482 wps->encr_type = WPS_ENCR_TKIP; 1483 else { 1484 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1485 "type for WPA/WPA2"); 1486 return -1; 1487 } 1488 } else { 1489 if (wps->encr_type & WPS_ENCR_WEP) 1490 wps->encr_type = WPS_ENCR_WEP; 1491 else if (wps->encr_type & WPS_ENCR_NONE) 1492 wps->encr_type = WPS_ENCR_NONE; 1493 else { 1494 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1495 "type for non-WPA/WPA2 mode"); 1496 return -1; 1497 } 1498 } 1499 wps->cred.encr_type = wps->encr_type; 1500 /* 1501 * Set MAC address in the Credential to be the Enrollee's MAC address 1502 */ 1503 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1504 1505 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1506 !wps->wps->registrar->disable_auto_conf) { 1507 u8 r[16]; 1508 /* Generate a random passphrase */ 1509 if (random_get_bytes(r, sizeof(r)) < 0) 1510 return -1; 1511 os_free(wps->new_psk); 1512 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1513 if (wps->new_psk == NULL) 1514 return -1; 1515 wps->new_psk_len--; /* remove newline */ 1516 while (wps->new_psk_len && 1517 wps->new_psk[wps->new_psk_len - 1] == '=') 1518 wps->new_psk_len--; 1519 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1520 wps->new_psk, wps->new_psk_len); 1521 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1522 wps->cred.key_len = wps->new_psk_len; 1523 } else if (wps->use_psk_key && wps->wps->psk_set) { 1524 char hex[65]; 1525 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1526 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1527 os_memcpy(wps->cred.key, hex, 32 * 2); 1528 wps->cred.key_len = 32 * 2; 1529 } else if (wps->wps->network_key) { 1530 os_memcpy(wps->cred.key, wps->wps->network_key, 1531 wps->wps->network_key_len); 1532 wps->cred.key_len = wps->wps->network_key_len; 1533 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1534 char hex[65]; 1535 /* Generate a random per-device PSK */ 1536 os_free(wps->new_psk); 1537 wps->new_psk_len = 32; 1538 wps->new_psk = os_malloc(wps->new_psk_len); 1539 if (wps->new_psk == NULL) 1540 return -1; 1541 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1542 os_free(wps->new_psk); 1543 wps->new_psk = NULL; 1544 return -1; 1545 } 1546 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1547 wps->new_psk, wps->new_psk_len); 1548 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1549 wps->new_psk_len); 1550 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1551 wps->cred.key_len = wps->new_psk_len * 2; 1552 } 1553 1554use_provided: 1555#ifdef CONFIG_WPS_TESTING 1556 if (wps_testing_dummy_cred) 1557 cred = wpabuf_alloc(200); 1558 else 1559 cred = NULL; 1560 if (cred) { 1561 struct wps_credential dummy; 1562 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1563 os_memset(&dummy, 0, sizeof(dummy)); 1564 os_memcpy(dummy.ssid, "dummy", 5); 1565 dummy.ssid_len = 5; 1566 dummy.auth_type = WPS_AUTH_WPA2PSK; 1567 dummy.encr_type = WPS_ENCR_AES; 1568 os_memcpy(dummy.key, "dummy psk", 9); 1569 dummy.key_len = 9; 1570 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1571 wps_build_credential(cred, &dummy); 1572 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1573 1574 wpabuf_put_be16(msg, ATTR_CRED); 1575 wpabuf_put_be16(msg, wpabuf_len(cred)); 1576 wpabuf_put_buf(msg, cred); 1577 1578 wpabuf_free(cred); 1579 } 1580#endif /* CONFIG_WPS_TESTING */ 1581 1582 cred = wpabuf_alloc(200); 1583 if (cred == NULL) 1584 return -1; 1585 1586 if (wps_build_credential(cred, &wps->cred)) { 1587 wpabuf_free(cred); 1588 return -1; 1589 } 1590 1591 wpabuf_put_be16(msg, ATTR_CRED); 1592 wpabuf_put_be16(msg, wpabuf_len(cred)); 1593 wpabuf_put_buf(msg, cred); 1594 wpabuf_free(cred); 1595 1596skip_cred_build: 1597 if (wps->wps->registrar->extra_cred) { 1598 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1599 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1600 } 1601 1602 return 0; 1603} 1604 1605 1606static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1607{ 1608 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1609 1610 if (wps_build_credential(msg, &wps->cred)) 1611 return -1; 1612 1613 return 0; 1614} 1615 1616 1617static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1618{ 1619 struct wpabuf *msg, *plain; 1620 1621 msg = wpabuf_alloc(1000); 1622 if (msg == NULL) 1623 return NULL; 1624 1625 plain = wpabuf_alloc(200); 1626 if (plain == NULL) { 1627 wpabuf_free(msg); 1628 return NULL; 1629 } 1630 1631 if (wps_build_ap_settings(wps, plain)) { 1632 wpabuf_free(plain); 1633 wpabuf_free(msg); 1634 return NULL; 1635 } 1636 1637 wpabuf_put_be16(msg, ATTR_CRED); 1638 wpabuf_put_be16(msg, wpabuf_len(plain)); 1639 wpabuf_put_buf(msg, plain); 1640 wpabuf_free(plain); 1641 1642 return msg; 1643} 1644 1645 1646static struct wpabuf * wps_build_m2(struct wps_data *wps) 1647{ 1648 struct wpabuf *msg; 1649 1650 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1651 return NULL; 1652 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1653 wps->nonce_r, WPS_NONCE_LEN); 1654 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1655 1656 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1657 msg = wpabuf_alloc(1000); 1658 if (msg == NULL) 1659 return NULL; 1660 1661 if (wps_build_version(msg) || 1662 wps_build_msg_type(msg, WPS_M2) || 1663 wps_build_enrollee_nonce(wps, msg) || 1664 wps_build_registrar_nonce(wps, msg) || 1665 wps_build_uuid_r(wps, msg) || 1666 wps_build_public_key(wps, msg) || 1667 wps_derive_keys(wps) || 1668 wps_build_auth_type_flags(wps, msg) || 1669 wps_build_encr_type_flags(wps, msg) || 1670 wps_build_conn_type_flags(wps, msg) || 1671 wps_build_config_methods_r(wps->wps->registrar, msg) || 1672 wps_build_device_attrs(&wps->wps->dev, msg) || 1673 wps_build_rf_bands(&wps->wps->dev, msg) || 1674 wps_build_assoc_state(wps, msg) || 1675 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1676 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1677 wps_build_os_version(&wps->wps->dev, msg) || 1678 wps_build_wfa_ext(msg, 0, NULL, 0) || 1679 wps_build_authenticator(wps, msg)) { 1680 wpabuf_free(msg); 1681 return NULL; 1682 } 1683 1684 wps->int_reg = 1; 1685 wps->state = RECV_M3; 1686 return msg; 1687} 1688 1689 1690static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1691{ 1692 struct wpabuf *msg; 1693 u16 err = wps->config_error; 1694 1695 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1696 msg = wpabuf_alloc(1000); 1697 if (msg == NULL) 1698 return NULL; 1699 1700 if (wps->wps->ap && wps->wps->ap_setup_locked && 1701 err == WPS_CFG_NO_ERROR) 1702 err = WPS_CFG_SETUP_LOCKED; 1703 1704 if (wps_build_version(msg) || 1705 wps_build_msg_type(msg, WPS_M2D) || 1706 wps_build_enrollee_nonce(wps, msg) || 1707 wps_build_registrar_nonce(wps, msg) || 1708 wps_build_uuid_r(wps, msg) || 1709 wps_build_auth_type_flags(wps, msg) || 1710 wps_build_encr_type_flags(wps, msg) || 1711 wps_build_conn_type_flags(wps, msg) || 1712 wps_build_config_methods_r(wps->wps->registrar, msg) || 1713 wps_build_device_attrs(&wps->wps->dev, msg) || 1714 wps_build_rf_bands(&wps->wps->dev, msg) || 1715 wps_build_assoc_state(wps, msg) || 1716 wps_build_config_error(msg, err) || 1717 wps_build_os_version(&wps->wps->dev, msg) || 1718 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1719 wpabuf_free(msg); 1720 return NULL; 1721 } 1722 1723 wps->state = RECV_M2D_ACK; 1724 return msg; 1725} 1726 1727 1728static struct wpabuf * wps_build_m4(struct wps_data *wps) 1729{ 1730 struct wpabuf *msg, *plain; 1731 1732 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1733 1734 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1735 1736 plain = wpabuf_alloc(200); 1737 if (plain == NULL) 1738 return NULL; 1739 1740 msg = wpabuf_alloc(1000); 1741 if (msg == NULL) { 1742 wpabuf_free(plain); 1743 return NULL; 1744 } 1745 1746 if (wps_build_version(msg) || 1747 wps_build_msg_type(msg, WPS_M4) || 1748 wps_build_enrollee_nonce(wps, msg) || 1749 wps_build_r_hash(wps, msg) || 1750 wps_build_r_snonce1(wps, plain) || 1751 wps_build_key_wrap_auth(wps, plain) || 1752 wps_build_encr_settings(wps, msg, plain) || 1753 wps_build_wfa_ext(msg, 0, NULL, 0) || 1754 wps_build_authenticator(wps, msg)) { 1755 wpabuf_free(plain); 1756 wpabuf_free(msg); 1757 return NULL; 1758 } 1759 wpabuf_free(plain); 1760 1761 wps->state = RECV_M5; 1762 return msg; 1763} 1764 1765 1766static struct wpabuf * wps_build_m6(struct wps_data *wps) 1767{ 1768 struct wpabuf *msg, *plain; 1769 1770 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1771 1772 plain = wpabuf_alloc(200); 1773 if (plain == NULL) 1774 return NULL; 1775 1776 msg = wpabuf_alloc(1000); 1777 if (msg == NULL) { 1778 wpabuf_free(plain); 1779 return NULL; 1780 } 1781 1782 if (wps_build_version(msg) || 1783 wps_build_msg_type(msg, WPS_M6) || 1784 wps_build_enrollee_nonce(wps, msg) || 1785 wps_build_r_snonce2(wps, plain) || 1786 wps_build_key_wrap_auth(wps, plain) || 1787 wps_build_encr_settings(wps, msg, plain) || 1788 wps_build_wfa_ext(msg, 0, NULL, 0) || 1789 wps_build_authenticator(wps, msg)) { 1790 wpabuf_free(plain); 1791 wpabuf_free(msg); 1792 return NULL; 1793 } 1794 wpabuf_free(plain); 1795 1796 wps->wps_pin_revealed = 1; 1797 wps->state = RECV_M7; 1798 return msg; 1799} 1800 1801 1802static struct wpabuf * wps_build_m8(struct wps_data *wps) 1803{ 1804 struct wpabuf *msg, *plain; 1805 1806 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1807 1808 plain = wpabuf_alloc(500); 1809 if (plain == NULL) 1810 return NULL; 1811 1812 msg = wpabuf_alloc(1000); 1813 if (msg == NULL) { 1814 wpabuf_free(plain); 1815 return NULL; 1816 } 1817 1818 if (wps_build_version(msg) || 1819 wps_build_msg_type(msg, WPS_M8) || 1820 wps_build_enrollee_nonce(wps, msg) || 1821 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1822 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1823 wps_build_key_wrap_auth(wps, plain) || 1824 wps_build_encr_settings(wps, msg, plain) || 1825 wps_build_wfa_ext(msg, 0, NULL, 0) || 1826 wps_build_authenticator(wps, msg)) { 1827 wpabuf_free(plain); 1828 wpabuf_free(msg); 1829 return NULL; 1830 } 1831 wpabuf_free(plain); 1832 1833 wps->state = RECV_DONE; 1834 return msg; 1835} 1836 1837 1838struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1839 enum wsc_op_code *op_code) 1840{ 1841 struct wpabuf *msg; 1842 1843#ifdef CONFIG_WPS_UPNP 1844 if (!wps->int_reg && wps->wps->wps_upnp) { 1845 struct upnp_pending_message *p, *prev = NULL; 1846 if (wps->ext_reg > 1) 1847 wps_registrar_free_pending_m2(wps->wps); 1848 p = wps->wps->upnp_msgs; 1849 /* TODO: check pending message MAC address */ 1850 while (p && p->next) { 1851 prev = p; 1852 p = p->next; 1853 } 1854 if (p) { 1855 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1856 "UPnP"); 1857 if (prev) 1858 prev->next = NULL; 1859 else 1860 wps->wps->upnp_msgs = NULL; 1861 msg = p->msg; 1862 switch (p->type) { 1863 case WPS_WSC_ACK: 1864 *op_code = WSC_ACK; 1865 break; 1866 case WPS_WSC_NACK: 1867 *op_code = WSC_NACK; 1868 break; 1869 default: 1870 *op_code = WSC_MSG; 1871 break; 1872 } 1873 os_free(p); 1874 if (wps->ext_reg == 0) 1875 wps->ext_reg = 1; 1876 return msg; 1877 } 1878 } 1879 if (wps->ext_reg) { 1880 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 1881 "pending message available"); 1882 return NULL; 1883 } 1884#endif /* CONFIG_WPS_UPNP */ 1885 1886 switch (wps->state) { 1887 case SEND_M2: 1888 if (wps_get_dev_password(wps) < 0) 1889 msg = wps_build_m2d(wps); 1890 else 1891 msg = wps_build_m2(wps); 1892 *op_code = WSC_MSG; 1893 break; 1894 case SEND_M2D: 1895 msg = wps_build_m2d(wps); 1896 *op_code = WSC_MSG; 1897 break; 1898 case SEND_M4: 1899 msg = wps_build_m4(wps); 1900 *op_code = WSC_MSG; 1901 break; 1902 case SEND_M6: 1903 msg = wps_build_m6(wps); 1904 *op_code = WSC_MSG; 1905 break; 1906 case SEND_M8: 1907 msg = wps_build_m8(wps); 1908 *op_code = WSC_MSG; 1909 break; 1910 case RECV_DONE: 1911 msg = wps_build_wsc_ack(wps); 1912 *op_code = WSC_ACK; 1913 break; 1914 case SEND_WSC_NACK: 1915 msg = wps_build_wsc_nack(wps); 1916 *op_code = WSC_NACK; 1917 break; 1918 default: 1919 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 1920 "a message", wps->state); 1921 msg = NULL; 1922 break; 1923 } 1924 1925 if (*op_code == WSC_MSG && msg) { 1926 /* Save a copy of the last message for Authenticator derivation 1927 */ 1928 wpabuf_free(wps->last_msg); 1929 wps->last_msg = wpabuf_dup(msg); 1930 } 1931 1932 return msg; 1933} 1934 1935 1936static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 1937{ 1938 if (e_nonce == NULL) { 1939 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 1940 return -1; 1941 } 1942 1943 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 1944 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 1945 wps->nonce_e, WPS_NONCE_LEN); 1946 1947 return 0; 1948} 1949 1950 1951static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 1952{ 1953 if (r_nonce == NULL) { 1954 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 1955 return -1; 1956 } 1957 1958 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 1959 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 1960 return -1; 1961 } 1962 1963 return 0; 1964} 1965 1966 1967static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 1968{ 1969 if (uuid_e == NULL) { 1970 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 1971 return -1; 1972 } 1973 1974 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 1975 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 1976 1977 return 0; 1978} 1979 1980 1981static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 1982{ 1983 if (pw_id == NULL) { 1984 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 1985 return -1; 1986 } 1987 1988 wps->dev_pw_id = WPA_GET_BE16(pw_id); 1989 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 1990 1991 return 0; 1992} 1993 1994 1995static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 1996{ 1997 if (e_hash1 == NULL) { 1998 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 1999 return -1; 2000 } 2001 2002 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2003 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2004 2005 return 0; 2006} 2007 2008 2009static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2010{ 2011 if (e_hash2 == NULL) { 2012 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2013 return -1; 2014 } 2015 2016 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2017 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2018 2019 return 0; 2020} 2021 2022 2023static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2024{ 2025 u8 hash[SHA256_MAC_LEN]; 2026 const u8 *addr[4]; 2027 size_t len[4]; 2028 2029 if (e_snonce1 == NULL) { 2030 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2031 return -1; 2032 } 2033 2034 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2035 WPS_SECRET_NONCE_LEN); 2036 2037 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2038 addr[0] = e_snonce1; 2039 len[0] = WPS_SECRET_NONCE_LEN; 2040 addr[1] = wps->psk1; 2041 len[1] = WPS_PSK_LEN; 2042 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2043 len[2] = wpabuf_len(wps->dh_pubkey_e); 2044 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2045 len[3] = wpabuf_len(wps->dh_pubkey_r); 2046 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2047 2048 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2049 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2050 "not match with the pre-committed value"); 2051 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2052 wps_pwd_auth_fail_event(wps->wps, 0, 1); 2053 return -1; 2054 } 2055 2056 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2057 "half of the device password"); 2058 2059 return 0; 2060} 2061 2062 2063static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2064{ 2065 u8 hash[SHA256_MAC_LEN]; 2066 const u8 *addr[4]; 2067 size_t len[4]; 2068 2069 if (e_snonce2 == NULL) { 2070 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2071 return -1; 2072 } 2073 2074 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2075 WPS_SECRET_NONCE_LEN); 2076 2077 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2078 addr[0] = e_snonce2; 2079 len[0] = WPS_SECRET_NONCE_LEN; 2080 addr[1] = wps->psk2; 2081 len[1] = WPS_PSK_LEN; 2082 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2083 len[2] = wpabuf_len(wps->dh_pubkey_e); 2084 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2085 len[3] = wpabuf_len(wps->dh_pubkey_r); 2086 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2087 2088 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2089 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2090 "not match with the pre-committed value"); 2091 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2092 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2093 wps_pwd_auth_fail_event(wps->wps, 0, 2); 2094 return -1; 2095 } 2096 2097 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2098 "half of the device password"); 2099 wps->wps_pin_revealed = 0; 2100 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2101 2102 /* 2103 * In case wildcard PIN is used and WPS handshake succeeds in the first 2104 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2105 * sure the PIN gets invalidated here. 2106 */ 2107 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2108 2109 return 0; 2110} 2111 2112 2113static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2114{ 2115 if (mac_addr == NULL) { 2116 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2117 return -1; 2118 } 2119 2120 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2121 MAC2STR(mac_addr)); 2122 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2123 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2124 2125 return 0; 2126} 2127 2128 2129static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2130 size_t pk_len) 2131{ 2132 if (pk == NULL || pk_len == 0) { 2133 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2134 return -1; 2135 } 2136 2137#ifdef CONFIG_WPS_OOB 2138 if (wps->wps->oob_conf.pubkey_hash != NULL) { 2139 const u8 *addr[1]; 2140 u8 hash[WPS_HASH_LEN]; 2141 2142 addr[0] = pk; 2143 sha256_vector(1, addr, &pk_len, hash); 2144 if (os_memcmp(hash, 2145 wpabuf_head(wps->wps->oob_conf.pubkey_hash), 2146 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2147 wpa_printf(MSG_ERROR, "WPS: Public Key hash error"); 2148 return -1; 2149 } 2150 } 2151#endif /* CONFIG_WPS_OOB */ 2152 2153 wpabuf_free(wps->dh_pubkey_e); 2154 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2155 if (wps->dh_pubkey_e == NULL) 2156 return -1; 2157 2158 return 0; 2159} 2160 2161 2162static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2163{ 2164 u16 auth_types; 2165 2166 if (auth == NULL) { 2167 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2168 "received"); 2169 return -1; 2170 } 2171 2172 auth_types = WPA_GET_BE16(auth); 2173 2174 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2175 auth_types); 2176 wps->auth_type = wps->wps->auth_types & auth_types; 2177 if (wps->auth_type == 0) { 2178 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2179 "authentication types (own 0x%x Enrollee 0x%x)", 2180 wps->wps->auth_types, auth_types); 2181#ifdef WPS_WORKAROUNDS 2182 /* 2183 * Some deployed implementations seem to advertise incorrect 2184 * information in this attribute. For example, Linksys WRT350N 2185 * seems to have a byteorder bug that breaks this negotiation. 2186 * In order to interoperate with existing implementations, 2187 * assume that the Enrollee supports everything we do. 2188 */ 2189 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2190 "does not advertise supported authentication types " 2191 "correctly"); 2192 wps->auth_type = wps->wps->auth_types; 2193#else /* WPS_WORKAROUNDS */ 2194 return -1; 2195#endif /* WPS_WORKAROUNDS */ 2196 } 2197 2198 return 0; 2199} 2200 2201 2202static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2203{ 2204 u16 encr_types; 2205 2206 if (encr == NULL) { 2207 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2208 "received"); 2209 return -1; 2210 } 2211 2212 encr_types = WPA_GET_BE16(encr); 2213 2214 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2215 encr_types); 2216 wps->encr_type = wps->wps->encr_types & encr_types; 2217 if (wps->encr_type == 0) { 2218 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2219 "encryption types (own 0x%x Enrollee 0x%x)", 2220 wps->wps->encr_types, encr_types); 2221#ifdef WPS_WORKAROUNDS 2222 /* 2223 * Some deployed implementations seem to advertise incorrect 2224 * information in this attribute. For example, Linksys WRT350N 2225 * seems to have a byteorder bug that breaks this negotiation. 2226 * In order to interoperate with existing implementations, 2227 * assume that the Enrollee supports everything we do. 2228 */ 2229 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2230 "does not advertise supported encryption types " 2231 "correctly"); 2232 wps->encr_type = wps->wps->encr_types; 2233#else /* WPS_WORKAROUNDS */ 2234 return -1; 2235#endif /* WPS_WORKAROUNDS */ 2236 } 2237 2238 return 0; 2239} 2240 2241 2242static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2243{ 2244 if (conn == NULL) { 2245 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2246 "received"); 2247 return -1; 2248 } 2249 2250 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2251 *conn); 2252 2253 return 0; 2254} 2255 2256 2257static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2258{ 2259 u16 m; 2260 2261 if (methods == NULL) { 2262 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2263 return -1; 2264 } 2265 2266 m = WPA_GET_BE16(methods); 2267 2268 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2269 "%s%s%s%s%s%s%s%s%s", m, 2270 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2271 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2272 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2273 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2274 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2275 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2276 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2277 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2278 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2279 2280 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2281 /* 2282 * The Enrollee does not have a display so it is unlikely to be 2283 * able to show the passphrase to a user and as such, could 2284 * benefit from receiving PSK to reduce key derivation time. 2285 */ 2286 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2287 "Enrollee not supporting display"); 2288 wps->use_psk_key = 1; 2289 } 2290 2291 return 0; 2292} 2293 2294 2295static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2296{ 2297 if (state == NULL) { 2298 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2299 "received"); 2300 return -1; 2301 } 2302 2303 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2304 *state); 2305 2306 return 0; 2307} 2308 2309 2310static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2311{ 2312 u16 a; 2313 2314 if (assoc == NULL) { 2315 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2316 return -1; 2317 } 2318 2319 a = WPA_GET_BE16(assoc); 2320 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2321 2322 return 0; 2323} 2324 2325 2326static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2327{ 2328 u16 e; 2329 2330 if (err == NULL) { 2331 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2332 return -1; 2333 } 2334 2335 e = WPA_GET_BE16(err); 2336 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2337 2338 return 0; 2339} 2340 2341 2342static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2343{ 2344#ifdef CONFIG_P2P 2345 struct wps_registrar *reg = wps->wps->registrar; 2346 2347 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2348 return 1; /* no filtering in use */ 2349 2350 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2351 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2352 "filtering for PBC: expected " MACSTR " was " 2353 MACSTR " - indicate PBC session overlap", 2354 MAC2STR(reg->p2p_dev_addr), 2355 MAC2STR(wps->p2p_dev_addr)); 2356 return 0; 2357 } 2358#endif /* CONFIG_P2P */ 2359 return 1; 2360} 2361 2362 2363static int wps_registrar_skip_overlap(struct wps_data *wps) 2364{ 2365#ifdef CONFIG_P2P 2366 struct wps_registrar *reg = wps->wps->registrar; 2367 2368 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2369 return 0; /* no specific Enrollee selected */ 2370 2371 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2372 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2373 "Enrollee match"); 2374 return 1; 2375 } 2376#endif /* CONFIG_P2P */ 2377 return 0; 2378} 2379 2380 2381static enum wps_process_res wps_process_m1(struct wps_data *wps, 2382 struct wps_parse_attr *attr) 2383{ 2384 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2385 2386 if (wps->state != RECV_M1) { 2387 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2388 "receiving M1", wps->state); 2389 return WPS_FAILURE; 2390 } 2391 2392 if (wps_process_uuid_e(wps, attr->uuid_e) || 2393 wps_process_mac_addr(wps, attr->mac_addr) || 2394 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2395 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2396 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2397 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2398 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2399 wps_process_config_methods(wps, attr->config_methods) || 2400 wps_process_wps_state(wps, attr->wps_state) || 2401 wps_process_device_attrs(&wps->peer_dev, attr) || 2402 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2403 wps_process_assoc_state(wps, attr->assoc_state) || 2404 wps_process_dev_password_id(wps, attr->dev_password_id) || 2405 wps_process_config_error(wps, attr->config_error) || 2406 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2407 return WPS_FAILURE; 2408 2409 if (wps->dev_pw_id < 0x10 && 2410 wps->dev_pw_id != DEV_PW_DEFAULT && 2411 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2412 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2413 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2414 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2415 !wps->wps->registrar->pbc)) { 2416 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2417 wps->dev_pw_id); 2418 wps->state = SEND_M2D; 2419 return WPS_CONTINUE; 2420 } 2421 2422#ifdef CONFIG_WPS_OOB 2423 if (wps->dev_pw_id >= 0x10 && 2424 wps->dev_pw_id != wps->wps->oob_dev_pw_id) { 2425 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID " 2426 "%d mismatch", wps->dev_pw_id); 2427 wps->state = SEND_M2D; 2428 return WPS_CONTINUE; 2429 } 2430#endif /* CONFIG_WPS_OOB */ 2431 2432 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2433 if ((wps->wps->registrar->force_pbc_overlap || 2434 wps_registrar_pbc_overlap(wps->wps->registrar, 2435 wps->mac_addr_e, wps->uuid_e) || 2436 !wps_registrar_p2p_dev_addr_match(wps)) && 2437 !wps_registrar_skip_overlap(wps)) { 2438 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2439 "negotiation"); 2440 wps->state = SEND_M2D; 2441 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2442 wps_pbc_overlap_event(wps->wps); 2443 wps_fail_event(wps->wps, WPS_M1, 2444 WPS_CFG_MULTIPLE_PBC_DETECTED, 2445 WPS_EI_NO_ERROR); 2446 wps->wps->registrar->force_pbc_overlap = 1; 2447 return WPS_CONTINUE; 2448 } 2449 wps_registrar_add_pbc_session(wps->wps->registrar, 2450 wps->mac_addr_e, wps->uuid_e); 2451 wps->pbc = 1; 2452 } 2453 2454#ifdef WPS_WORKAROUNDS 2455 /* 2456 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2457 * passphrase format. To avoid interop issues, force PSK format to be 2458 * used. 2459 */ 2460 if (!wps->use_psk_key && 2461 wps->peer_dev.manufacturer && 2462 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2463 wps->peer_dev.model_name && 2464 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2465 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2466 "PSK format"); 2467 wps->use_psk_key = 1; 2468 } 2469#endif /* WPS_WORKAROUNDS */ 2470 2471 wps->state = SEND_M2; 2472 return WPS_CONTINUE; 2473} 2474 2475 2476static enum wps_process_res wps_process_m3(struct wps_data *wps, 2477 const struct wpabuf *msg, 2478 struct wps_parse_attr *attr) 2479{ 2480 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2481 2482 if (wps->state != RECV_M3) { 2483 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2484 "receiving M3", wps->state); 2485 wps->state = SEND_WSC_NACK; 2486 return WPS_CONTINUE; 2487 } 2488 2489 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2490 !wps_registrar_skip_overlap(wps)) { 2491 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2492 "session overlap"); 2493 wps->state = SEND_WSC_NACK; 2494 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2495 return WPS_CONTINUE; 2496 } 2497 2498 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2499 wps_process_authenticator(wps, attr->authenticator, msg) || 2500 wps_process_e_hash1(wps, attr->e_hash1) || 2501 wps_process_e_hash2(wps, attr->e_hash2)) { 2502 wps->state = SEND_WSC_NACK; 2503 return WPS_CONTINUE; 2504 } 2505 2506 wps->state = SEND_M4; 2507 return WPS_CONTINUE; 2508} 2509 2510 2511static enum wps_process_res wps_process_m5(struct wps_data *wps, 2512 const struct wpabuf *msg, 2513 struct wps_parse_attr *attr) 2514{ 2515 struct wpabuf *decrypted; 2516 struct wps_parse_attr eattr; 2517 2518 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2519 2520 if (wps->state != RECV_M5) { 2521 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2522 "receiving M5", wps->state); 2523 wps->state = SEND_WSC_NACK; 2524 return WPS_CONTINUE; 2525 } 2526 2527 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2528 !wps_registrar_skip_overlap(wps)) { 2529 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2530 "session overlap"); 2531 wps->state = SEND_WSC_NACK; 2532 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2533 return WPS_CONTINUE; 2534 } 2535 2536 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2537 wps_process_authenticator(wps, attr->authenticator, msg)) { 2538 wps->state = SEND_WSC_NACK; 2539 return WPS_CONTINUE; 2540 } 2541 2542 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2543 attr->encr_settings_len); 2544 if (decrypted == NULL) { 2545 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2546 "Settings attribute"); 2547 wps->state = SEND_WSC_NACK; 2548 return WPS_CONTINUE; 2549 } 2550 2551 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2552 wpabuf_free(decrypted); 2553 wps->state = SEND_WSC_NACK; 2554 return WPS_CONTINUE; 2555 } 2556 2557 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2558 "attribute"); 2559 if (wps_parse_msg(decrypted, &eattr) < 0 || 2560 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2561 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2562 wpabuf_free(decrypted); 2563 wps->state = SEND_WSC_NACK; 2564 return WPS_CONTINUE; 2565 } 2566 wpabuf_free(decrypted); 2567 2568 wps->state = SEND_M6; 2569 return WPS_CONTINUE; 2570} 2571 2572 2573static void wps_sta_cred_cb(struct wps_data *wps) 2574{ 2575 /* 2576 * Update credential to only include a single authentication and 2577 * encryption type in case the AP configuration includes more than one 2578 * option. 2579 */ 2580 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2581 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2582 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2583 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2584 if (wps->cred.encr_type & WPS_ENCR_AES) 2585 wps->cred.encr_type = WPS_ENCR_AES; 2586 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2587 wps->cred.encr_type = WPS_ENCR_TKIP; 2588 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2589 "AP configuration"); 2590 if (wps->wps->cred_cb) 2591 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2592} 2593 2594 2595static void wps_cred_update(struct wps_credential *dst, 2596 struct wps_credential *src) 2597{ 2598 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2599 dst->ssid_len = src->ssid_len; 2600 dst->auth_type = src->auth_type; 2601 dst->encr_type = src->encr_type; 2602 dst->key_idx = src->key_idx; 2603 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2604 dst->key_len = src->key_len; 2605} 2606 2607 2608static int wps_process_ap_settings_r(struct wps_data *wps, 2609 struct wps_parse_attr *attr) 2610{ 2611 struct wpabuf *msg; 2612 2613 if (wps->wps->ap || wps->er) 2614 return 0; 2615 2616 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2617 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2618 return -1; 2619 2620 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2621 2622 if (wps->new_ap_settings) { 2623 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2624 "new settings"); 2625 wps_cred_update(&wps->cred, wps->new_ap_settings); 2626 return 0; 2627 } else { 2628 /* 2629 * Use the AP PIN only to receive the current AP settings, not 2630 * to reconfigure the AP. 2631 */ 2632 2633 /* 2634 * Clear selected registrar here since we do not get to 2635 * WSC_Done in this protocol run. 2636 */ 2637 wps_registrar_pin_completed(wps->wps->registrar); 2638 2639 msg = wps_build_ap_cred(wps); 2640 if (msg == NULL) 2641 return -1; 2642 wps->cred.cred_attr = wpabuf_head(msg); 2643 wps->cred.cred_attr_len = wpabuf_len(msg); 2644 2645 if (wps->ap_settings_cb) { 2646 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2647 &wps->cred); 2648 wpabuf_free(msg); 2649 return 1; 2650 } 2651 wps_sta_cred_cb(wps); 2652 2653 wps->cred.cred_attr = NULL; 2654 wps->cred.cred_attr_len = 0; 2655 wpabuf_free(msg); 2656 2657 return 1; 2658 } 2659} 2660 2661 2662static enum wps_process_res wps_process_m7(struct wps_data *wps, 2663 const struct wpabuf *msg, 2664 struct wps_parse_attr *attr) 2665{ 2666 struct wpabuf *decrypted; 2667 struct wps_parse_attr eattr; 2668 2669 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2670 2671 if (wps->state != RECV_M7) { 2672 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2673 "receiving M7", wps->state); 2674 wps->state = SEND_WSC_NACK; 2675 return WPS_CONTINUE; 2676 } 2677 2678 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2679 !wps_registrar_skip_overlap(wps)) { 2680 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2681 "session overlap"); 2682 wps->state = SEND_WSC_NACK; 2683 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2684 return WPS_CONTINUE; 2685 } 2686 2687 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2688 wps_process_authenticator(wps, attr->authenticator, msg)) { 2689 wps->state = SEND_WSC_NACK; 2690 return WPS_CONTINUE; 2691 } 2692 2693 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2694 attr->encr_settings_len); 2695 if (decrypted == NULL) { 2696 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2697 "Settings attribute"); 2698 wps->state = SEND_WSC_NACK; 2699 return WPS_CONTINUE; 2700 } 2701 2702 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2703 attr->version2 != NULL) < 0) { 2704 wpabuf_free(decrypted); 2705 wps->state = SEND_WSC_NACK; 2706 return WPS_CONTINUE; 2707 } 2708 2709 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2710 "attribute"); 2711 if (wps_parse_msg(decrypted, &eattr) < 0 || 2712 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2713 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2714 wps_process_ap_settings_r(wps, &eattr)) { 2715 wpabuf_free(decrypted); 2716 wps->state = SEND_WSC_NACK; 2717 return WPS_CONTINUE; 2718 } 2719 2720 wpabuf_free(decrypted); 2721 2722 wps->state = SEND_M8; 2723 return WPS_CONTINUE; 2724} 2725 2726 2727static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2728 const struct wpabuf *msg) 2729{ 2730 struct wps_parse_attr attr; 2731 enum wps_process_res ret = WPS_CONTINUE; 2732 2733 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2734 2735 if (wps_parse_msg(msg, &attr) < 0) 2736 return WPS_FAILURE; 2737 2738 if (attr.msg_type == NULL) { 2739 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2740 wps->state = SEND_WSC_NACK; 2741 return WPS_CONTINUE; 2742 } 2743 2744 if (*attr.msg_type != WPS_M1 && 2745 (attr.registrar_nonce == NULL || 2746 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2747 WPS_NONCE_LEN != 0))) { 2748 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2749 return WPS_FAILURE; 2750 } 2751 2752 switch (*attr.msg_type) { 2753 case WPS_M1: 2754 if (wps_validate_m1(msg) < 0) 2755 return WPS_FAILURE; 2756#ifdef CONFIG_WPS_UPNP 2757 if (wps->wps->wps_upnp && attr.mac_addr) { 2758 /* Remove old pending messages when starting new run */ 2759 wps_free_pending_msgs(wps->wps->upnp_msgs); 2760 wps->wps->upnp_msgs = NULL; 2761 2762 upnp_wps_device_send_wlan_event( 2763 wps->wps->wps_upnp, attr.mac_addr, 2764 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2765 } 2766#endif /* CONFIG_WPS_UPNP */ 2767 ret = wps_process_m1(wps, &attr); 2768 break; 2769 case WPS_M3: 2770 if (wps_validate_m3(msg) < 0) 2771 return WPS_FAILURE; 2772 ret = wps_process_m3(wps, msg, &attr); 2773 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2774 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2775 wps->error_indication); 2776 break; 2777 case WPS_M5: 2778 if (wps_validate_m5(msg) < 0) 2779 return WPS_FAILURE; 2780 ret = wps_process_m5(wps, msg, &attr); 2781 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2782 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2783 wps->error_indication); 2784 break; 2785 case WPS_M7: 2786 if (wps_validate_m7(msg) < 0) 2787 return WPS_FAILURE; 2788 ret = wps_process_m7(wps, msg, &attr); 2789 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2790 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2791 wps->error_indication); 2792 break; 2793 default: 2794 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2795 *attr.msg_type); 2796 return WPS_FAILURE; 2797 } 2798 2799 if (ret == WPS_CONTINUE) { 2800 /* Save a copy of the last message for Authenticator derivation 2801 */ 2802 wpabuf_free(wps->last_msg); 2803 wps->last_msg = wpabuf_dup(msg); 2804 } 2805 2806 return ret; 2807} 2808 2809 2810static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2811 const struct wpabuf *msg) 2812{ 2813 struct wps_parse_attr attr; 2814 2815 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2816 2817 if (wps_parse_msg(msg, &attr) < 0) 2818 return WPS_FAILURE; 2819 2820 if (attr.msg_type == NULL) { 2821 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2822 return WPS_FAILURE; 2823 } 2824 2825 if (*attr.msg_type != WPS_WSC_ACK) { 2826 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2827 *attr.msg_type); 2828 return WPS_FAILURE; 2829 } 2830 2831#ifdef CONFIG_WPS_UPNP 2832 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2833 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2834 if (wps->wps->upnp_msgs) 2835 return WPS_CONTINUE; 2836 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2837 "external Registrar"); 2838 return WPS_PENDING; 2839 } 2840#endif /* CONFIG_WPS_UPNP */ 2841 2842 if (attr.registrar_nonce == NULL || 2843 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2844 { 2845 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2846 return WPS_FAILURE; 2847 } 2848 2849 if (attr.enrollee_nonce == NULL || 2850 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2851 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2852 return WPS_FAILURE; 2853 } 2854 2855 if (wps->state == RECV_M2D_ACK) { 2856#ifdef CONFIG_WPS_UPNP 2857 if (wps->wps->wps_upnp && 2858 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2859 if (wps->wps->upnp_msgs) 2860 return WPS_CONTINUE; 2861 if (wps->ext_reg == 0) 2862 wps->ext_reg = 1; 2863 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2864 "external Registrar"); 2865 return WPS_PENDING; 2866 } 2867#endif /* CONFIG_WPS_UPNP */ 2868 2869 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 2870 "terminate negotiation"); 2871 } 2872 2873 return WPS_FAILURE; 2874} 2875 2876 2877static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 2878 const struct wpabuf *msg) 2879{ 2880 struct wps_parse_attr attr; 2881 int old_state; 2882 u16 config_error; 2883 2884 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 2885 2886 old_state = wps->state; 2887 wps->state = SEND_WSC_NACK; 2888 2889 if (wps_parse_msg(msg, &attr) < 0) 2890 return WPS_FAILURE; 2891 2892 if (attr.msg_type == NULL) { 2893 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2894 return WPS_FAILURE; 2895 } 2896 2897 if (*attr.msg_type != WPS_WSC_NACK) { 2898 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2899 *attr.msg_type); 2900 return WPS_FAILURE; 2901 } 2902 2903#ifdef CONFIG_WPS_UPNP 2904 if (wps->wps->wps_upnp && wps->ext_reg) { 2905 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 2906 "Registrar terminated by the Enrollee"); 2907 return WPS_FAILURE; 2908 } 2909#endif /* CONFIG_WPS_UPNP */ 2910 2911 if (attr.registrar_nonce == NULL || 2912 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2913 { 2914 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2915 return WPS_FAILURE; 2916 } 2917 2918 if (attr.enrollee_nonce == NULL || 2919 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2920 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2921 return WPS_FAILURE; 2922 } 2923 2924 if (attr.config_error == NULL) { 2925 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 2926 "in WSC_NACK"); 2927 return WPS_FAILURE; 2928 } 2929 2930 config_error = WPA_GET_BE16(attr.config_error); 2931 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 2932 "Configuration Error %d", config_error); 2933 2934 switch (old_state) { 2935 case RECV_M3: 2936 wps_fail_event(wps->wps, WPS_M2, config_error, 2937 wps->error_indication); 2938 break; 2939 case RECV_M5: 2940 wps_fail_event(wps->wps, WPS_M4, config_error, 2941 wps->error_indication); 2942 break; 2943 case RECV_M7: 2944 wps_fail_event(wps->wps, WPS_M6, config_error, 2945 wps->error_indication); 2946 break; 2947 case RECV_DONE: 2948 wps_fail_event(wps->wps, WPS_M8, config_error, 2949 wps->error_indication); 2950 break; 2951 default: 2952 break; 2953 } 2954 2955 return WPS_FAILURE; 2956} 2957 2958 2959static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 2960 const struct wpabuf *msg) 2961{ 2962 struct wps_parse_attr attr; 2963 2964 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 2965 2966 if (wps->state != RECV_DONE && 2967 (!wps->wps->wps_upnp || !wps->ext_reg)) { 2968 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2969 "receiving WSC_Done", wps->state); 2970 return WPS_FAILURE; 2971 } 2972 2973 if (wps_parse_msg(msg, &attr) < 0) 2974 return WPS_FAILURE; 2975 2976 if (attr.msg_type == NULL) { 2977 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2978 return WPS_FAILURE; 2979 } 2980 2981 if (*attr.msg_type != WPS_WSC_DONE) { 2982 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2983 *attr.msg_type); 2984 return WPS_FAILURE; 2985 } 2986 2987#ifdef CONFIG_WPS_UPNP 2988 if (wps->wps->wps_upnp && wps->ext_reg) { 2989 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 2990 "Registrar completed successfully"); 2991 wps_device_store(wps->wps->registrar, &wps->peer_dev, 2992 wps->uuid_e); 2993 return WPS_DONE; 2994 } 2995#endif /* CONFIG_WPS_UPNP */ 2996 2997 if (attr.registrar_nonce == NULL || 2998 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2999 { 3000 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3001 return WPS_FAILURE; 3002 } 3003 3004 if (attr.enrollee_nonce == NULL || 3005 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 3006 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3007 return WPS_FAILURE; 3008 } 3009 3010 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3011 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3012 wps->uuid_e); 3013 3014 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3015 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3016 struct wps_credential cred; 3017 3018 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3019 "on first Enrollee connection"); 3020 3021 os_memset(&cred, 0, sizeof(cred)); 3022 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3023 cred.ssid_len = wps->wps->ssid_len; 3024 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3025 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3026 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3027 cred.key_len = wps->new_psk_len; 3028 3029 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3030 wpa_hexdump_ascii_key(MSG_DEBUG, 3031 "WPS: Generated random passphrase", 3032 wps->new_psk, wps->new_psk_len); 3033 if (wps->wps->cred_cb) 3034 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3035 3036 os_free(wps->new_psk); 3037 wps->new_psk = NULL; 3038 } 3039 3040 if (!wps->wps->ap && !wps->er) 3041 wps_sta_cred_cb(wps); 3042 3043 if (wps->new_psk) { 3044 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3045 wps->new_psk, wps->new_psk_len)) { 3046 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3047 "new PSK"); 3048 } 3049 os_free(wps->new_psk); 3050 wps->new_psk = NULL; 3051 } 3052 3053 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e); 3054 3055 if (wps->pbc) { 3056 wps_registrar_remove_pbc_session(wps->wps->registrar, 3057 wps->uuid_e, 3058 wps->p2p_dev_addr); 3059 wps_registrar_pbc_completed(wps->wps->registrar); 3060 } else { 3061 wps_registrar_pin_completed(wps->wps->registrar); 3062 } 3063 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3064 * merge them into APs own list.. */ 3065 3066 wps_success_event(wps->wps); 3067 3068 return WPS_DONE; 3069} 3070 3071 3072enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3073 enum wsc_op_code op_code, 3074 const struct wpabuf *msg) 3075{ 3076 enum wps_process_res ret; 3077 3078 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3079 "op_code=%d)", 3080 (unsigned long) wpabuf_len(msg), op_code); 3081 3082#ifdef CONFIG_WPS_UPNP 3083 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3084 struct wps_parse_attr attr; 3085 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3086 *attr.msg_type == WPS_M3) 3087 wps->ext_reg = 2; /* past M2/M2D phase */ 3088 } 3089 if (wps->ext_reg > 1) 3090 wps_registrar_free_pending_m2(wps->wps); 3091 if (wps->wps->wps_upnp && wps->ext_reg && 3092 wps->wps->upnp_msgs == NULL && 3093 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3094 { 3095 struct wps_parse_attr attr; 3096 int type; 3097 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3098 type = -1; 3099 else 3100 type = *attr.msg_type; 3101 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3102 " to external Registrar for processing", type); 3103 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3104 wps->mac_addr_e, 3105 UPNP_WPS_WLANEVENT_TYPE_EAP, 3106 msg); 3107 if (op_code == WSC_MSG) 3108 return WPS_PENDING; 3109 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3110 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3111 "external Registrar"); 3112 return WPS_CONTINUE; 3113 } 3114#endif /* CONFIG_WPS_UPNP */ 3115 3116 switch (op_code) { 3117 case WSC_MSG: 3118 return wps_process_wsc_msg(wps, msg); 3119 case WSC_ACK: 3120 if (wps_validate_wsc_ack(msg) < 0) 3121 return WPS_FAILURE; 3122 return wps_process_wsc_ack(wps, msg); 3123 case WSC_NACK: 3124 if (wps_validate_wsc_nack(msg) < 0) 3125 return WPS_FAILURE; 3126 return wps_process_wsc_nack(wps, msg); 3127 case WSC_Done: 3128 if (wps_validate_wsc_done(msg) < 0) 3129 return WPS_FAILURE; 3130 ret = wps_process_wsc_done(wps, msg); 3131 if (ret == WPS_FAILURE) { 3132 wps->state = SEND_WSC_NACK; 3133 wps_fail_event(wps->wps, WPS_WSC_DONE, 3134 wps->config_error, 3135 wps->error_indication); 3136 } 3137 return ret; 3138 default: 3139 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3140 return WPS_FAILURE; 3141 } 3142} 3143 3144 3145int wps_registrar_update_ie(struct wps_registrar *reg) 3146{ 3147 return wps_set_ie(reg); 3148} 3149 3150 3151static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3152 void *timeout_ctx) 3153{ 3154 struct wps_registrar *reg = eloop_ctx; 3155 3156 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3157 "unselect internal Registrar"); 3158 reg->selected_registrar = 0; 3159 reg->pbc = 0; 3160 wps_registrar_selected_registrar_changed(reg); 3161} 3162 3163 3164#ifdef CONFIG_WPS_UPNP 3165static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3166 struct subscription *s) 3167{ 3168 int i, j; 3169 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3170 "config_methods=0x%x)", 3171 s->dev_password_id, s->config_methods); 3172 reg->sel_reg_union = 1; 3173 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3174 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3175 if (reg->sel_reg_config_methods_override == -1) 3176 reg->sel_reg_config_methods_override = 0; 3177 reg->sel_reg_config_methods_override |= s->config_methods; 3178 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3179 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3180 break; 3181 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3182 j++) { 3183 if (is_zero_ether_addr(s->authorized_macs[j])) 3184 break; 3185 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3186 MACSTR, MAC2STR(s->authorized_macs[j])); 3187 os_memcpy(reg->authorized_macs_union[i], 3188 s->authorized_macs[j], ETH_ALEN); 3189 i++; 3190 } 3191 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3192 (u8 *) reg->authorized_macs_union, 3193 sizeof(reg->authorized_macs_union)); 3194} 3195#endif /* CONFIG_WPS_UPNP */ 3196 3197 3198static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3199{ 3200#ifdef CONFIG_WPS_UPNP 3201 struct subscription *s; 3202 3203 if (reg->wps->wps_upnp == NULL) 3204 return; 3205 3206 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3207 struct subscription, list) { 3208 struct subscr_addr *sa; 3209 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3210 if (sa) { 3211 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3212 inet_ntoa(sa->saddr.sin_addr), 3213 ntohs(sa->saddr.sin_port)); 3214 } 3215 if (s->selected_registrar) 3216 wps_registrar_sel_reg_add(reg, s); 3217 else 3218 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3219 "selected"); 3220 } 3221#endif /* CONFIG_WPS_UPNP */ 3222} 3223 3224 3225/** 3226 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3227 * @reg: Registrar data from wps_registrar_init() 3228 * 3229 * This function is called when selected registrar state changes, e.g., when an 3230 * AP receives a SetSelectedRegistrar UPnP message. 3231 */ 3232void wps_registrar_selected_registrar_changed(struct wps_registrar *reg) 3233{ 3234 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3235 3236 reg->sel_reg_union = reg->selected_registrar; 3237 reg->sel_reg_dev_password_id_override = -1; 3238 reg->sel_reg_config_methods_override = -1; 3239 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3240 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3241 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3242 (u8 *) reg->authorized_macs_union, 3243 sizeof(reg->authorized_macs_union)); 3244 if (reg->selected_registrar) { 3245 u16 methods; 3246 3247 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3248#ifdef CONFIG_WPS2 3249 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3250 WPS_CONFIG_PHY_PUSHBUTTON); 3251#endif /* CONFIG_WPS2 */ 3252 if (reg->pbc) { 3253 reg->sel_reg_dev_password_id_override = 3254 DEV_PW_PUSHBUTTON; 3255 wps_set_pushbutton(&methods, reg->wps->config_methods); 3256 } 3257 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3258 "(pbc=%d)", reg->pbc); 3259 reg->sel_reg_config_methods_override = methods; 3260 } else 3261 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3262 3263 wps_registrar_sel_reg_union(reg); 3264 3265 wps_set_ie(reg); 3266 wps_cb_set_sel_reg(reg); 3267} 3268 3269 3270int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3271 char *buf, size_t buflen) 3272{ 3273 struct wps_registrar_device *d; 3274 int len = 0, ret; 3275 char uuid[40]; 3276 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3277 3278 d = wps_device_get(reg, addr); 3279 if (d == NULL) 3280 return 0; 3281 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3282 return 0; 3283 3284 ret = os_snprintf(buf + len, buflen - len, 3285 "wpsUuid=%s\n" 3286 "wpsPrimaryDeviceType=%s\n" 3287 "wpsDeviceName=%s\n" 3288 "wpsManufacturer=%s\n" 3289 "wpsModelName=%s\n" 3290 "wpsModelNumber=%s\n" 3291 "wpsSerialNumber=%s\n", 3292 uuid, 3293 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3294 sizeof(devtype)), 3295 d->dev.device_name ? d->dev.device_name : "", 3296 d->dev.manufacturer ? d->dev.manufacturer : "", 3297 d->dev.model_name ? d->dev.model_name : "", 3298 d->dev.model_number ? d->dev.model_number : "", 3299 d->dev.serial_number ? d->dev.serial_number : ""); 3300 if (ret < 0 || (size_t) ret >= buflen - len) 3301 return len; 3302 len += ret; 3303 3304 return len; 3305} 3306 3307 3308int wps_registrar_config_ap(struct wps_registrar *reg, 3309 struct wps_credential *cred) 3310{ 3311#ifdef CONFIG_WPS2 3312 printf("encr_type=0x%x\n", cred->encr_type); 3313 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3314 WPS_ENCR_AES))) { 3315 if (cred->encr_type & WPS_ENCR_WEP) { 3316 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3317 "due to WEP configuration"); 3318 return -1; 3319 } 3320 3321 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3322 "invalid encr_type 0x%x", cred->encr_type); 3323 return -1; 3324 } 3325 3326 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3327 WPS_ENCR_TKIP) { 3328 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3329 "TKIP+AES"); 3330 cred->encr_type |= WPS_ENCR_AES; 3331 } 3332 3333 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3334 WPS_AUTH_WPAPSK) { 3335 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3336 "WPAPSK+WPA2PSK"); 3337 cred->auth_type |= WPS_AUTH_WPA2PSK; 3338 } 3339#endif /* CONFIG_WPS2 */ 3340 3341 if (reg->wps->cred_cb) 3342 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3343 3344 return -1; 3345} 3346