wps_registrar.c revision 8d520ff1dc2da35cdca849e982051b86468016d8
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "utils/includes.h" 16 17#include "utils/common.h" 18#include "utils/base64.h" 19#include "utils/eloop.h" 20#include "utils/uuid.h" 21#include "utils/list.h" 22#include "crypto/crypto.h" 23#include "crypto/sha256.h" 24#include "crypto/random.h" 25#include "common/ieee802_11_defs.h" 26#include "wps_i.h" 27#include "wps_dev_attr.h" 28#include "wps_upnp.h" 29#include "wps_upnp_i.h" 30 31#ifndef CONFIG_WPS_STRICT 32#define WPS_WORKAROUNDS 33#endif /* CONFIG_WPS_STRICT */ 34 35struct wps_uuid_pin { 36 struct dl_list list; 37 u8 uuid[WPS_UUID_LEN]; 38 int wildcard_uuid; 39 u8 *pin; 40 size_t pin_len; 41#define PIN_LOCKED BIT(0) 42#define PIN_EXPIRES BIT(1) 43 int flags; 44 struct os_time expiration; 45 u8 enrollee_addr[ETH_ALEN]; 46}; 47 48 49static void wps_free_pin(struct wps_uuid_pin *pin) 50{ 51 os_free(pin->pin); 52 os_free(pin); 53} 54 55 56static void wps_remove_pin(struct wps_uuid_pin *pin) 57{ 58 dl_list_del(&pin->list); 59 wps_free_pin(pin); 60} 61 62 63static void wps_free_pins(struct dl_list *pins) 64{ 65 struct wps_uuid_pin *pin, *prev; 66 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 67 wps_remove_pin(pin); 68} 69 70 71struct wps_pbc_session { 72 struct wps_pbc_session *next; 73 u8 addr[ETH_ALEN]; 74 u8 uuid_e[WPS_UUID_LEN]; 75 struct os_time timestamp; 76}; 77 78 79static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 80{ 81 struct wps_pbc_session *prev; 82 83 while (pbc) { 84 prev = pbc; 85 pbc = pbc->next; 86 os_free(prev); 87 } 88} 89 90 91struct wps_registrar_device { 92 struct wps_registrar_device *next; 93 struct wps_device_data dev; 94 u8 uuid[WPS_UUID_LEN]; 95}; 96 97 98struct wps_registrar { 99 struct wps_context *wps; 100 101 int pbc; 102 int selected_registrar; 103 104 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk, 105 size_t psk_len); 106 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 107 struct wpabuf *probe_resp_ie); 108 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 109 const struct wps_device_data *dev); 110 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 111 const u8 *uuid_e); 112 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 113 u16 sel_reg_config_methods); 114 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 115 const u8 *pri_dev_type, u16 config_methods, 116 u16 dev_password_id, u8 request_type, 117 const char *dev_name); 118 void *cb_ctx; 119 120 struct dl_list pins; 121 struct wps_pbc_session *pbc_sessions; 122 123 int skip_cred_build; 124 struct wpabuf *extra_cred; 125 int disable_auto_conf; 126 int sel_reg_union; 127 int sel_reg_dev_password_id_override; 128 int sel_reg_config_methods_override; 129 int static_wep_only; 130 int dualband; 131 132 struct wps_registrar_device *devices; 133 134 int force_pbc_overlap; 135 136 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 137 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 138 139 u8 p2p_dev_addr[ETH_ALEN]; 140}; 141 142 143static int wps_set_ie(struct wps_registrar *reg); 144static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 145static void wps_registrar_set_selected_timeout(void *eloop_ctx, 146 void *timeout_ctx); 147 148 149static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 150 const u8 *addr) 151{ 152 int i; 153 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 154 MAC2STR(addr)); 155 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 156 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 157 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 158 "already in the list"); 159 return; /* already in list */ 160 } 161 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 162 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 163 ETH_ALEN); 164 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 165 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 166 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 167} 168 169 170static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 171 const u8 *addr) 172{ 173 int i; 174 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 175 MAC2STR(addr)); 176 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 177 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 178 break; 179 } 180 if (i == WPS_MAX_AUTHORIZED_MACS) { 181 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 182 "list"); 183 return; /* not in the list */ 184 } 185 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 186 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 187 ETH_ALEN); 188 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 189 ETH_ALEN); 190 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 191 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 192} 193 194 195static void wps_free_devices(struct wps_registrar_device *dev) 196{ 197 struct wps_registrar_device *prev; 198 199 while (dev) { 200 prev = dev; 201 dev = dev->next; 202 wps_device_data_free(&prev->dev); 203 os_free(prev); 204 } 205} 206 207 208static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 209 const u8 *addr) 210{ 211 struct wps_registrar_device *dev; 212 213 for (dev = reg->devices; dev; dev = dev->next) { 214 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 215 return dev; 216 } 217 return NULL; 218} 219 220 221static void wps_device_clone_data(struct wps_device_data *dst, 222 struct wps_device_data *src) 223{ 224 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 225 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 226 227#define WPS_STRDUP(n) \ 228 os_free(dst->n); \ 229 dst->n = src->n ? os_strdup(src->n) : NULL 230 231 WPS_STRDUP(device_name); 232 WPS_STRDUP(manufacturer); 233 WPS_STRDUP(model_name); 234 WPS_STRDUP(model_number); 235 WPS_STRDUP(serial_number); 236#undef WPS_STRDUP 237} 238 239 240int wps_device_store(struct wps_registrar *reg, 241 struct wps_device_data *dev, const u8 *uuid) 242{ 243 struct wps_registrar_device *d; 244 245 d = wps_device_get(reg, dev->mac_addr); 246 if (d == NULL) { 247 d = os_zalloc(sizeof(*d)); 248 if (d == NULL) 249 return -1; 250 d->next = reg->devices; 251 reg->devices = d; 252 } 253 254 wps_device_clone_data(&d->dev, dev); 255 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 256 257 return 0; 258} 259 260 261static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 262 const u8 *addr, const u8 *uuid_e) 263{ 264 struct wps_pbc_session *pbc, *prev = NULL; 265 struct os_time now; 266 267 os_get_time(&now); 268 269 pbc = reg->pbc_sessions; 270 while (pbc) { 271 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 272 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 273 if (prev) 274 prev->next = pbc->next; 275 else 276 reg->pbc_sessions = pbc->next; 277 break; 278 } 279 prev = pbc; 280 pbc = pbc->next; 281 } 282 283 if (!pbc) { 284 pbc = os_zalloc(sizeof(*pbc)); 285 if (pbc == NULL) 286 return; 287 os_memcpy(pbc->addr, addr, ETH_ALEN); 288 if (uuid_e) 289 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 290 } 291 292 pbc->next = reg->pbc_sessions; 293 reg->pbc_sessions = pbc; 294 pbc->timestamp = now; 295 296 /* remove entries that have timed out */ 297 prev = pbc; 298 pbc = pbc->next; 299 300 while (pbc) { 301 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 302 prev->next = NULL; 303 wps_free_pbc_sessions(pbc); 304 break; 305 } 306 prev = pbc; 307 pbc = pbc->next; 308 } 309} 310 311 312static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 313 const u8 *uuid_e) 314{ 315 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 316 317 pbc = reg->pbc_sessions; 318 while (pbc) { 319 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 320 if (prev) 321 prev->next = pbc->next; 322 else 323 reg->pbc_sessions = pbc->next; 324 tmp = pbc; 325 pbc = pbc->next; 326 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 327 "addr=" MACSTR, MAC2STR(tmp->addr)); 328 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 329 tmp->uuid_e, WPS_UUID_LEN); 330 os_free(tmp); 331 continue; 332 } 333 prev = pbc; 334 pbc = pbc->next; 335 } 336} 337 338 339int wps_registrar_pbc_overlap(struct wps_registrar *reg, 340 const u8 *addr, const u8 *uuid_e) 341{ 342 int count = 0; 343 struct wps_pbc_session *pbc; 344 struct wps_pbc_session *first = NULL; 345 struct os_time now; 346 347 os_get_time(&now); 348 349 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 350 351 if (uuid_e) { 352 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 353 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 354 uuid_e, WPS_UUID_LEN); 355 count++; 356 } 357 358 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 359 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 360 MAC2STR(pbc->addr)); 361 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 362 pbc->uuid_e, WPS_UUID_LEN); 363 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 364 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has " 365 "expired"); 366 break; 367 } 368 if (first && 369 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 370 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 371 continue; /* same Enrollee */ 372 } 373 if (uuid_e == NULL || 374 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 375 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 376 count++; 377 } 378 if (first == NULL) 379 first = pbc; 380 } 381 382 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 383 384 return count > 1 ? 1 : 0; 385} 386 387 388static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 389{ 390 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 391 wps->wps_state); 392 wpabuf_put_be16(msg, ATTR_WPS_STATE); 393 wpabuf_put_be16(msg, 1); 394 wpabuf_put_u8(msg, wps->wps_state); 395 return 0; 396} 397 398 399#ifdef CONFIG_WPS_UPNP 400static void wps_registrar_free_pending_m2(struct wps_context *wps) 401{ 402 struct upnp_pending_message *p, *p2, *prev = NULL; 403 p = wps->upnp_msgs; 404 while (p) { 405 if (p->type == WPS_M2 || p->type == WPS_M2D) { 406 if (prev == NULL) 407 wps->upnp_msgs = p->next; 408 else 409 prev->next = p->next; 410 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 411 p2 = p; 412 p = p->next; 413 wpabuf_free(p2->msg); 414 os_free(p2); 415 continue; 416 } 417 prev = p; 418 p = p->next; 419 } 420} 421#endif /* CONFIG_WPS_UPNP */ 422 423 424static int wps_build_ap_setup_locked(struct wps_context *wps, 425 struct wpabuf *msg) 426{ 427 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 428 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 429 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 430 wpabuf_put_be16(msg, 1); 431 wpabuf_put_u8(msg, 1); 432 } 433 return 0; 434} 435 436 437static int wps_build_selected_registrar(struct wps_registrar *reg, 438 struct wpabuf *msg) 439{ 440 if (!reg->sel_reg_union) 441 return 0; 442 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 443 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 444 wpabuf_put_be16(msg, 1); 445 wpabuf_put_u8(msg, 1); 446 return 0; 447} 448 449 450static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 451 struct wpabuf *msg) 452{ 453 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 454 if (!reg->sel_reg_union) 455 return 0; 456 if (reg->sel_reg_dev_password_id_override >= 0) 457 id = reg->sel_reg_dev_password_id_override; 458 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 459 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 460 wpabuf_put_be16(msg, 2); 461 wpabuf_put_be16(msg, id); 462 return 0; 463} 464 465 466static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 467 struct wpabuf *msg) 468{ 469 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 470 if (!reg->sel_reg_union) 471 return 0; 472 if (reg->sel_reg_dev_password_id_override >= 0) 473 id = reg->sel_reg_dev_password_id_override; 474 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 475 return 0; 476 return wps_build_uuid_e(msg, reg->wps->uuid); 477} 478 479 480static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 481{ 482 *methods |= WPS_CONFIG_PUSHBUTTON; 483#ifdef CONFIG_WPS2 484 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) 485 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 486 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) 487 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 488 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 489 WPS_CONFIG_VIRT_PUSHBUTTON || 490 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 491 WPS_CONFIG_PHY_PUSHBUTTON) { 492 /* 493 * Required to include virtual/physical flag, but we were not 494 * configured with push button type, so have to default to one 495 * of them. 496 */ 497 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 498 } 499#endif /* CONFIG_WPS2 */ 500} 501 502 503static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 504 struct wpabuf *msg) 505{ 506 u16 methods; 507 if (!reg->sel_reg_union) 508 return 0; 509 methods = reg->wps->config_methods; 510 methods &= ~WPS_CONFIG_PUSHBUTTON; 511#ifdef CONFIG_WPS2 512 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 513 WPS_CONFIG_PHY_PUSHBUTTON); 514#endif /* CONFIG_WPS2 */ 515 if (reg->pbc) 516 wps_set_pushbutton(&methods, reg->wps->config_methods); 517 if (reg->sel_reg_config_methods_override >= 0) 518 methods = reg->sel_reg_config_methods_override; 519 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 520 methods); 521 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 522 wpabuf_put_be16(msg, 2); 523 wpabuf_put_be16(msg, methods); 524 return 0; 525} 526 527 528static int wps_build_probe_config_methods(struct wps_registrar *reg, 529 struct wpabuf *msg) 530{ 531 u16 methods; 532 /* 533 * These are the methods that the AP supports as an Enrollee for adding 534 * external Registrars. 535 */ 536 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 537#ifdef CONFIG_WPS2 538 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 539 WPS_CONFIG_PHY_PUSHBUTTON); 540#endif /* CONFIG_WPS2 */ 541 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 542 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 543 wpabuf_put_be16(msg, 2); 544 wpabuf_put_be16(msg, methods); 545 return 0; 546} 547 548 549static int wps_build_config_methods_r(struct wps_registrar *reg, 550 struct wpabuf *msg) 551{ 552 u16 methods; 553 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 554#ifdef CONFIG_WPS2 555 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 556 WPS_CONFIG_PHY_PUSHBUTTON); 557#endif /* CONFIG_WPS2 */ 558 if (reg->pbc) 559 wps_set_pushbutton(&methods, reg->wps->config_methods); 560 return wps_build_config_methods(msg, methods); 561} 562 563 564const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 565{ 566 *count = 0; 567 568#ifdef CONFIG_WPS2 569 while (*count < WPS_MAX_AUTHORIZED_MACS) { 570 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 571 break; 572 (*count)++; 573 } 574#endif /* CONFIG_WPS2 */ 575 576 return (const u8 *) reg->authorized_macs_union; 577} 578 579 580/** 581 * wps_registrar_init - Initialize WPS Registrar data 582 * @wps: Pointer to longterm WPS context 583 * @cfg: Registrar configuration 584 * Returns: Pointer to allocated Registrar data or %NULL on failure 585 * 586 * This function is used to initialize WPS Registrar functionality. It can be 587 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 588 * runs (e.g., when run as an internal Registrar in an AP). Caller is 589 * responsible for freeing the returned data with wps_registrar_deinit() when 590 * Registrar functionality is not needed anymore. 591 */ 592struct wps_registrar * 593wps_registrar_init(struct wps_context *wps, 594 const struct wps_registrar_config *cfg) 595{ 596 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 597 if (reg == NULL) 598 return NULL; 599 600 dl_list_init(®->pins); 601 reg->wps = wps; 602 reg->new_psk_cb = cfg->new_psk_cb; 603 reg->set_ie_cb = cfg->set_ie_cb; 604 reg->pin_needed_cb = cfg->pin_needed_cb; 605 reg->reg_success_cb = cfg->reg_success_cb; 606 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 607 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 608 reg->cb_ctx = cfg->cb_ctx; 609 reg->skip_cred_build = cfg->skip_cred_build; 610 if (cfg->extra_cred) { 611 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 612 cfg->extra_cred_len); 613 if (reg->extra_cred == NULL) { 614 os_free(reg); 615 return NULL; 616 } 617 } 618 reg->disable_auto_conf = cfg->disable_auto_conf; 619 reg->sel_reg_dev_password_id_override = -1; 620 reg->sel_reg_config_methods_override = -1; 621 reg->static_wep_only = cfg->static_wep_only; 622 reg->dualband = cfg->dualband; 623 624 if (wps_set_ie(reg)) { 625 wps_registrar_deinit(reg); 626 return NULL; 627 } 628 629 return reg; 630} 631 632 633/** 634 * wps_registrar_deinit - Deinitialize WPS Registrar data 635 * @reg: Registrar data from wps_registrar_init() 636 */ 637void wps_registrar_deinit(struct wps_registrar *reg) 638{ 639 if (reg == NULL) 640 return; 641 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 642 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 643 wps_free_pins(®->pins); 644 wps_free_pbc_sessions(reg->pbc_sessions); 645 wpabuf_free(reg->extra_cred); 646 wps_free_devices(reg->devices); 647 os_free(reg); 648} 649 650 651/** 652 * wps_registrar_add_pin - Configure a new PIN for Registrar 653 * @reg: Registrar data from wps_registrar_init() 654 * @addr: Enrollee MAC address or %NULL if not known 655 * @uuid: UUID-E or %NULL for wildcard (any UUID) 656 * @pin: PIN (Device Password) 657 * @pin_len: Length of pin in octets 658 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 659 * Returns: 0 on success, -1 on failure 660 */ 661int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 662 const u8 *uuid, const u8 *pin, size_t pin_len, 663 int timeout) 664{ 665 struct wps_uuid_pin *p; 666 667 p = os_zalloc(sizeof(*p)); 668 if (p == NULL) 669 return -1; 670 if (addr) 671 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 672 if (uuid == NULL) 673 p->wildcard_uuid = 1; 674 else 675 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 676 p->pin = os_malloc(pin_len); 677 if (p->pin == NULL) { 678 os_free(p); 679 return -1; 680 } 681 os_memcpy(p->pin, pin, pin_len); 682 p->pin_len = pin_len; 683 684 if (timeout) { 685 p->flags |= PIN_EXPIRES; 686 os_get_time(&p->expiration); 687 p->expiration.sec += timeout; 688 } 689 690 dl_list_add(®->pins, &p->list); 691 692 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 693 timeout); 694 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 695 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 696 reg->selected_registrar = 1; 697 reg->pbc = 0; 698 if (addr) 699 wps_registrar_add_authorized_mac(reg, addr); 700 else 701 wps_registrar_add_authorized_mac( 702 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 703 wps_registrar_selected_registrar_changed(reg); 704 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 705 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 706 wps_registrar_set_selected_timeout, 707 reg, NULL); 708 709 return 0; 710} 711 712 713static void wps_registrar_remove_pin(struct wps_registrar *reg, 714 struct wps_uuid_pin *pin) 715{ 716 u8 *addr; 717 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 718 719 if (is_zero_ether_addr(pin->enrollee_addr)) 720 addr = bcast; 721 else 722 addr = pin->enrollee_addr; 723 wps_registrar_remove_authorized_mac(reg, addr); 724 wps_remove_pin(pin); 725 wps_registrar_selected_registrar_changed(reg); 726} 727 728 729static void wps_registrar_expire_pins(struct wps_registrar *reg) 730{ 731 struct wps_uuid_pin *pin, *prev; 732 struct os_time now; 733 734 os_get_time(&now); 735 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 736 { 737 if ((pin->flags & PIN_EXPIRES) && 738 os_time_before(&pin->expiration, &now)) { 739 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 740 pin->uuid, WPS_UUID_LEN); 741 wps_registrar_remove_pin(reg, pin); 742 } 743 } 744} 745 746 747/** 748 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 749 * @reg: Registrar data from wps_registrar_init() 750 * Returns: 0 on success, -1 if not wildcard PIN is enabled 751 */ 752static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg) 753{ 754 struct wps_uuid_pin *pin, *prev; 755 756 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 757 { 758 if (pin->wildcard_uuid) { 759 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 760 pin->uuid, WPS_UUID_LEN); 761 wps_registrar_remove_pin(reg, pin); 762 return 0; 763 } 764 } 765 766 return -1; 767} 768 769 770/** 771 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 772 * @reg: Registrar data from wps_registrar_init() 773 * @uuid: UUID-E 774 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 775 */ 776int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 777{ 778 struct wps_uuid_pin *pin, *prev; 779 780 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 781 { 782 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 783 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 784 pin->uuid, WPS_UUID_LEN); 785 wps_registrar_remove_pin(reg, pin); 786 return 0; 787 } 788 } 789 790 return -1; 791} 792 793 794static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 795 const u8 *uuid, size_t *pin_len) 796{ 797 struct wps_uuid_pin *pin, *found = NULL; 798 799 wps_registrar_expire_pins(reg); 800 801 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 802 if (!pin->wildcard_uuid && 803 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 804 found = pin; 805 break; 806 } 807 } 808 809 if (!found) { 810 /* Check for wildcard UUIDs since none of the UUID-specific 811 * PINs matched */ 812 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 813 if (pin->wildcard_uuid == 1) { 814 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 815 "PIN. Assigned it for this UUID-E"); 816 pin->wildcard_uuid = 2; 817 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 818 found = pin; 819 break; 820 } 821 } 822 } 823 824 if (!found) 825 return NULL; 826 827 /* 828 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 829 * that could otherwise avoid PIN invalidations. 830 */ 831 if (found->flags & PIN_LOCKED) { 832 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 833 "allow concurrent re-use"); 834 return NULL; 835 } 836 *pin_len = found->pin_len; 837 found->flags |= PIN_LOCKED; 838 return found->pin; 839} 840 841 842/** 843 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 844 * @reg: Registrar data from wps_registrar_init() 845 * @uuid: UUID-E 846 * Returns: 0 on success, -1 on failure 847 * 848 * PINs are locked to enforce only one concurrent use. This function unlocks a 849 * PIN to allow it to be used again. If the specified PIN was configured using 850 * a wildcard UUID, it will be removed instead of allowing multiple uses. 851 */ 852int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 853{ 854 struct wps_uuid_pin *pin; 855 856 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 857 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 858 if (pin->wildcard_uuid == 2) { 859 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 860 "wildcard PIN"); 861 return wps_registrar_invalidate_pin(reg, uuid); 862 } 863 pin->flags &= ~PIN_LOCKED; 864 return 0; 865 } 866 } 867 868 return -1; 869} 870 871 872static void wps_registrar_stop_pbc(struct wps_registrar *reg) 873{ 874 reg->selected_registrar = 0; 875 reg->pbc = 0; 876 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 877 wps_registrar_remove_authorized_mac(reg, 878 (u8 *) "\xff\xff\xff\xff\xff\xff"); 879 wps_registrar_selected_registrar_changed(reg); 880} 881 882 883static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 884{ 885 struct wps_registrar *reg = eloop_ctx; 886 887 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 888 wps_pbc_timeout_event(reg->wps); 889 wps_registrar_stop_pbc(reg); 890} 891 892 893/** 894 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 895 * @reg: Registrar data from wps_registrar_init() 896 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 897 * indicates no such filtering 898 * Returns: 0 on success, -1 on failure, -2 on session overlap 899 * 900 * This function is called on an AP when a push button is pushed to activate 901 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 902 * or when a PBC registration is completed. If more than one Enrollee in active 903 * PBC mode has been detected during the monitor time (previous 2 minutes), the 904 * PBC mode is not actived and -2 is returned to indicate session overlap. This 905 * is skipped if a specific Enrollee is selected. 906 */ 907int wps_registrar_button_pushed(struct wps_registrar *reg, 908 const u8 *p2p_dev_addr) 909{ 910 if (p2p_dev_addr == NULL && 911 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 912 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 913 "mode"); 914 wps_pbc_overlap_event(reg->wps); 915 return -2; 916 } 917 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 918 reg->force_pbc_overlap = 0; 919 reg->selected_registrar = 1; 920 reg->pbc = 1; 921 if (p2p_dev_addr) 922 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 923 else 924 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 925 wps_registrar_add_authorized_mac(reg, 926 (u8 *) "\xff\xff\xff\xff\xff\xff"); 927 wps_registrar_selected_registrar_changed(reg); 928 929 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 930 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 931 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 932 reg, NULL); 933 return 0; 934} 935 936 937static void wps_registrar_pbc_completed(struct wps_registrar *reg) 938{ 939 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 940 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 941 wps_registrar_stop_pbc(reg); 942} 943 944 945static void wps_registrar_pin_completed(struct wps_registrar *reg) 946{ 947 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 948 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 949 reg->selected_registrar = 0; 950 wps_registrar_selected_registrar_changed(reg); 951} 952 953 954int wps_registrar_wps_cancel(struct wps_registrar *reg) 955{ 956 if (reg->pbc) { 957 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 958 wps_registrar_pbc_timeout(reg, NULL); 959 return 1; 960 } else if (reg->selected_registrar) { 961 /* PIN Method */ 962 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 963 wps_registrar_pin_completed(reg); 964 wps_registrar_invalidate_wildcard_pin(reg); 965 return 1; 966 } 967 return 0; 968} 969 970 971/** 972 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 973 * @reg: Registrar data from wps_registrar_init() 974 * @addr: MAC address of the Probe Request sender 975 * @wps_data: WPS IE contents 976 * 977 * This function is called on an AP when a Probe Request with WPS IE is 978 * received. This is used to track PBC mode use and to detect possible overlap 979 * situation with other WPS APs. 980 */ 981void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 982 const struct wpabuf *wps_data, 983 int p2p_wildcard) 984{ 985 struct wps_parse_attr attr; 986 987 wpa_hexdump_buf(MSG_MSGDUMP, 988 "WPS: Probe Request with WPS data received", 989 wps_data); 990 991 if (wps_parse_msg(wps_data, &attr) < 0) 992 return; 993 994 if (attr.config_methods == NULL) { 995 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 996 "Probe Request"); 997 return; 998 } 999 1000 if (attr.dev_password_id == NULL) { 1001 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1002 "in Probe Request"); 1003 return; 1004 } 1005 1006 if (reg->enrollee_seen_cb && attr.uuid_e && 1007 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1008 char *dev_name = NULL; 1009 if (attr.dev_name) { 1010 dev_name = os_zalloc(attr.dev_name_len + 1); 1011 if (dev_name) { 1012 os_memcpy(dev_name, attr.dev_name, 1013 attr.dev_name_len); 1014 } 1015 } 1016 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1017 attr.primary_dev_type, 1018 WPA_GET_BE16(attr.config_methods), 1019 WPA_GET_BE16(attr.dev_password_id), 1020 *attr.request_type, dev_name); 1021 os_free(dev_name); 1022 } 1023 1024 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1025 return; /* Not PBC */ 1026 1027 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1028 MACSTR, MAC2STR(addr)); 1029 if (attr.uuid_e == NULL) { 1030 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1031 "UUID-E included"); 1032 return; 1033 } 1034 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1035 WPS_UUID_LEN); 1036 1037 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1038 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1039 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1040 reg->force_pbc_overlap = 1; 1041 wps_pbc_overlap_event(reg->wps); 1042 } 1043} 1044 1045 1046static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1047 const u8 *psk, size_t psk_len) 1048{ 1049 if (reg->new_psk_cb == NULL) 1050 return 0; 1051 1052 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len); 1053} 1054 1055 1056static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1057 const struct wps_device_data *dev) 1058{ 1059 if (reg->pin_needed_cb == NULL) 1060 return; 1061 1062 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1063} 1064 1065 1066static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1067 const u8 *uuid_e) 1068{ 1069 if (reg->reg_success_cb == NULL) 1070 return; 1071 1072 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e); 1073} 1074 1075 1076static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1077 struct wpabuf *probe_resp_ie) 1078{ 1079 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1080} 1081 1082 1083static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1084{ 1085 u16 methods = 0; 1086 if (reg->set_sel_reg_cb == NULL) 1087 return; 1088 1089 if (reg->selected_registrar) { 1090 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1091#ifdef CONFIG_WPS2 1092 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1093 WPS_CONFIG_PHY_PUSHBUTTON); 1094#endif /* CONFIG_WPS2 */ 1095 if (reg->pbc) 1096 wps_set_pushbutton(&methods, reg->wps->config_methods); 1097 } 1098 1099 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1100 "config_methods=0x%x pbc=%d methods=0x%x", 1101 reg->selected_registrar, reg->wps->config_methods, 1102 reg->pbc, methods); 1103 1104 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1105 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1106 methods); 1107} 1108 1109 1110static int wps_set_ie(struct wps_registrar *reg) 1111{ 1112 struct wpabuf *beacon; 1113 struct wpabuf *probe; 1114 const u8 *auth_macs; 1115 size_t count; 1116 size_t vendor_len = 0; 1117 int i; 1118 1119 if (reg->set_ie_cb == NULL) 1120 return 0; 1121 1122 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1123 if (reg->wps->dev.vendor_ext[i]) { 1124 vendor_len += 2 + 2; 1125 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1126 } 1127 } 1128 1129 beacon = wpabuf_alloc(400 + vendor_len); 1130 if (beacon == NULL) 1131 return -1; 1132 probe = wpabuf_alloc(500 + vendor_len); 1133 if (probe == NULL) { 1134 wpabuf_free(beacon); 1135 return -1; 1136 } 1137 1138 auth_macs = wps_authorized_macs(reg, &count); 1139 1140 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1141 1142 if (wps_build_version(beacon) || 1143 wps_build_wps_state(reg->wps, beacon) || 1144 wps_build_ap_setup_locked(reg->wps, beacon) || 1145 wps_build_selected_registrar(reg, beacon) || 1146 wps_build_sel_reg_dev_password_id(reg, beacon) || 1147 wps_build_sel_reg_config_methods(reg, beacon) || 1148 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1149 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon)) || 1150 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1151 wps_build_vendor_ext(®->wps->dev, beacon)) { 1152 wpabuf_free(beacon); 1153 wpabuf_free(probe); 1154 return -1; 1155 } 1156 1157#ifdef CONFIG_P2P 1158 if (wps_build_dev_name(®->wps->dev, beacon) || 1159 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1160 wpabuf_free(beacon); 1161 wpabuf_free(probe); 1162 return -1; 1163 } 1164#endif /* CONFIG_P2P */ 1165 1166 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1167 1168 if (wps_build_version(probe) || 1169 wps_build_wps_state(reg->wps, probe) || 1170 wps_build_ap_setup_locked(reg->wps, probe) || 1171 wps_build_selected_registrar(reg, probe) || 1172 wps_build_sel_reg_dev_password_id(reg, probe) || 1173 wps_build_sel_reg_config_methods(reg, probe) || 1174 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1175 WPS_RESP_REGISTRAR) || 1176 wps_build_uuid_e(probe, reg->wps->uuid) || 1177 wps_build_device_attrs(®->wps->dev, probe) || 1178 wps_build_probe_config_methods(reg, probe) || 1179 wps_build_rf_bands(®->wps->dev, probe) || 1180 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1181 wps_build_vendor_ext(®->wps->dev, probe)) { 1182 wpabuf_free(beacon); 1183 wpabuf_free(probe); 1184 return -1; 1185 } 1186 1187 beacon = wps_ie_encapsulate(beacon); 1188 probe = wps_ie_encapsulate(probe); 1189 1190 if (!beacon || !probe) { 1191 wpabuf_free(beacon); 1192 wpabuf_free(probe); 1193 return -1; 1194 } 1195 1196 if (reg->static_wep_only) { 1197 /* 1198 * Windows XP and Vista clients can get confused about 1199 * EAP-Identity/Request when they probe the network with 1200 * EAPOL-Start. In such a case, they may assume the network is 1201 * using IEEE 802.1X and prompt user for a certificate while 1202 * the correct (non-WPS) behavior would be to ask for the 1203 * static WEP key. As a workaround, use Microsoft Provisioning 1204 * IE to advertise that legacy 802.1X is not supported. 1205 */ 1206 const u8 ms_wps[7] = { 1207 WLAN_EID_VENDOR_SPECIFIC, 5, 1208 /* Microsoft Provisioning IE (00:50:f2:5) */ 1209 0x00, 0x50, 0xf2, 5, 1210 0x00 /* no legacy 802.1X or MS WPS */ 1211 }; 1212 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1213 "into Beacon/Probe Response frames"); 1214 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1215 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1216 } 1217 1218 return wps_cb_set_ie(reg, beacon, probe); 1219} 1220 1221 1222static int wps_get_dev_password(struct wps_data *wps) 1223{ 1224 const u8 *pin; 1225 size_t pin_len = 0; 1226 1227 os_free(wps->dev_password); 1228 wps->dev_password = NULL; 1229 1230 if (wps->pbc) { 1231 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1232 pin = (const u8 *) "00000000"; 1233 pin_len = 8; 1234 } else { 1235 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1236 &pin_len); 1237 } 1238 if (pin == NULL) { 1239 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1240 "the Enrollee"); 1241 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1242 &wps->peer_dev); 1243 return -1; 1244 } 1245 1246 wps->dev_password = os_malloc(pin_len); 1247 if (wps->dev_password == NULL) 1248 return -1; 1249 os_memcpy(wps->dev_password, pin, pin_len); 1250 wps->dev_password_len = pin_len; 1251 1252 return 0; 1253} 1254 1255 1256static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1257{ 1258 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1259 wpabuf_put_be16(msg, ATTR_UUID_R); 1260 wpabuf_put_be16(msg, WPS_UUID_LEN); 1261 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1262 return 0; 1263} 1264 1265 1266static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1267{ 1268 u8 *hash; 1269 const u8 *addr[4]; 1270 size_t len[4]; 1271 1272 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1273 return -1; 1274 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1275 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1276 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1277 1278 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1279 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1280 "R-Hash derivation"); 1281 return -1; 1282 } 1283 1284 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1285 wpabuf_put_be16(msg, ATTR_R_HASH1); 1286 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1287 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1288 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1289 addr[0] = wps->snonce; 1290 len[0] = WPS_SECRET_NONCE_LEN; 1291 addr[1] = wps->psk1; 1292 len[1] = WPS_PSK_LEN; 1293 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1294 len[2] = wpabuf_len(wps->dh_pubkey_e); 1295 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1296 len[3] = wpabuf_len(wps->dh_pubkey_r); 1297 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1298 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1299 1300 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1301 wpabuf_put_be16(msg, ATTR_R_HASH2); 1302 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1303 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1304 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1305 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1306 addr[1] = wps->psk2; 1307 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1308 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1309 1310 return 0; 1311} 1312 1313 1314static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1315{ 1316 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1317 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1318 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1319 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1320 return 0; 1321} 1322 1323 1324static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1325{ 1326 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1327 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1328 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1329 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1330 WPS_SECRET_NONCE_LEN); 1331 return 0; 1332} 1333 1334 1335static int wps_build_cred_network_idx(struct wpabuf *msg, 1336 const struct wps_credential *cred) 1337{ 1338 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1339 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1340 wpabuf_put_be16(msg, 1); 1341 wpabuf_put_u8(msg, 1); 1342 return 0; 1343} 1344 1345 1346static int wps_build_cred_ssid(struct wpabuf *msg, 1347 const struct wps_credential *cred) 1348{ 1349 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1350 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1351 cred->ssid, cred->ssid_len); 1352 wpabuf_put_be16(msg, ATTR_SSID); 1353 wpabuf_put_be16(msg, cred->ssid_len); 1354 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1355 return 0; 1356} 1357 1358 1359static int wps_build_cred_auth_type(struct wpabuf *msg, 1360 const struct wps_credential *cred) 1361{ 1362 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1363 cred->auth_type); 1364 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1365 wpabuf_put_be16(msg, 2); 1366 wpabuf_put_be16(msg, cred->auth_type); 1367 return 0; 1368} 1369 1370 1371static int wps_build_cred_encr_type(struct wpabuf *msg, 1372 const struct wps_credential *cred) 1373{ 1374 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1375 cred->encr_type); 1376 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1377 wpabuf_put_be16(msg, 2); 1378 wpabuf_put_be16(msg, cred->encr_type); 1379 return 0; 1380} 1381 1382 1383static int wps_build_cred_network_key(struct wpabuf *msg, 1384 const struct wps_credential *cred) 1385{ 1386 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1387 (int) cred->key_len); 1388 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1389 cred->key, cred->key_len); 1390 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1391 wpabuf_put_be16(msg, cred->key_len); 1392 wpabuf_put_data(msg, cred->key, cred->key_len); 1393 return 0; 1394} 1395 1396 1397static int wps_build_cred_mac_addr(struct wpabuf *msg, 1398 const struct wps_credential *cred) 1399{ 1400 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")", 1401 MAC2STR(cred->mac_addr)); 1402 wpabuf_put_be16(msg, ATTR_MAC_ADDR); 1403 wpabuf_put_be16(msg, ETH_ALEN); 1404 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN); 1405 return 0; 1406} 1407 1408 1409static int wps_build_credential(struct wpabuf *msg, 1410 const struct wps_credential *cred) 1411{ 1412 if (wps_build_cred_network_idx(msg, cred) || 1413 wps_build_cred_ssid(msg, cred) || 1414 wps_build_cred_auth_type(msg, cred) || 1415 wps_build_cred_encr_type(msg, cred) || 1416 wps_build_cred_network_key(msg, cred) || 1417 wps_build_cred_mac_addr(msg, cred)) 1418 return -1; 1419 return 0; 1420} 1421 1422 1423int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1424{ 1425 struct wpabuf *cred; 1426 1427 if (wps->wps->registrar->skip_cred_build) 1428 goto skip_cred_build; 1429 1430 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1431 if (wps->use_cred) { 1432 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1433 goto use_provided; 1434 } 1435 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1436 1437 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1438 wps->cred.ssid_len = wps->wps->ssid_len; 1439 1440 /* Select the best authentication and encryption type */ 1441 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1442 wps->auth_type = WPS_AUTH_WPA2PSK; 1443 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1444 wps->auth_type = WPS_AUTH_WPAPSK; 1445 else if (wps->auth_type & WPS_AUTH_OPEN) 1446 wps->auth_type = WPS_AUTH_OPEN; 1447 else if (wps->auth_type & WPS_AUTH_SHARED) 1448 wps->auth_type = WPS_AUTH_SHARED; 1449 else { 1450 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1451 wps->auth_type); 1452 return -1; 1453 } 1454 wps->cred.auth_type = wps->auth_type; 1455 1456 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1457 wps->auth_type == WPS_AUTH_WPAPSK) { 1458 if (wps->encr_type & WPS_ENCR_AES) 1459 wps->encr_type = WPS_ENCR_AES; 1460 else if (wps->encr_type & WPS_ENCR_TKIP) 1461 wps->encr_type = WPS_ENCR_TKIP; 1462 else { 1463 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1464 "type for WPA/WPA2"); 1465 return -1; 1466 } 1467 } else { 1468 if (wps->encr_type & WPS_ENCR_WEP) 1469 wps->encr_type = WPS_ENCR_WEP; 1470 else if (wps->encr_type & WPS_ENCR_NONE) 1471 wps->encr_type = WPS_ENCR_NONE; 1472 else { 1473 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1474 "type for non-WPA/WPA2 mode"); 1475 return -1; 1476 } 1477 } 1478 wps->cred.encr_type = wps->encr_type; 1479 /* 1480 * Set MAC address in the Credential to be the Enrollee's MAC address 1481 */ 1482 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1483 1484 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1485 !wps->wps->registrar->disable_auto_conf) { 1486 u8 r[16]; 1487 /* Generate a random passphrase */ 1488 if (random_get_bytes(r, sizeof(r)) < 0) 1489 return -1; 1490 os_free(wps->new_psk); 1491 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1492 if (wps->new_psk == NULL) 1493 return -1; 1494 wps->new_psk_len--; /* remove newline */ 1495 while (wps->new_psk_len && 1496 wps->new_psk[wps->new_psk_len - 1] == '=') 1497 wps->new_psk_len--; 1498 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1499 wps->new_psk, wps->new_psk_len); 1500 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1501 wps->cred.key_len = wps->new_psk_len; 1502 } else if (wps->use_psk_key && wps->wps->psk_set) { 1503 char hex[65]; 1504 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1505 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1506 os_memcpy(wps->cred.key, hex, 32 * 2); 1507 wps->cred.key_len = 32 * 2; 1508 } else if (wps->wps->network_key) { 1509 os_memcpy(wps->cred.key, wps->wps->network_key, 1510 wps->wps->network_key_len); 1511 wps->cred.key_len = wps->wps->network_key_len; 1512 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1513 char hex[65]; 1514 /* Generate a random per-device PSK */ 1515 os_free(wps->new_psk); 1516 wps->new_psk_len = 32; 1517 wps->new_psk = os_malloc(wps->new_psk_len); 1518 if (wps->new_psk == NULL) 1519 return -1; 1520 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1521 os_free(wps->new_psk); 1522 wps->new_psk = NULL; 1523 return -1; 1524 } 1525 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1526 wps->new_psk, wps->new_psk_len); 1527 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1528 wps->new_psk_len); 1529 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1530 wps->cred.key_len = wps->new_psk_len * 2; 1531 } 1532 1533use_provided: 1534#ifdef CONFIG_WPS_TESTING 1535 if (wps_testing_dummy_cred) 1536 cred = wpabuf_alloc(200); 1537 else 1538 cred = NULL; 1539 if (cred) { 1540 struct wps_credential dummy; 1541 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1542 os_memset(&dummy, 0, sizeof(dummy)); 1543 os_memcpy(dummy.ssid, "dummy", 5); 1544 dummy.ssid_len = 5; 1545 dummy.auth_type = WPS_AUTH_WPA2PSK; 1546 dummy.encr_type = WPS_ENCR_AES; 1547 os_memcpy(dummy.key, "dummy psk", 9); 1548 dummy.key_len = 9; 1549 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1550 wps_build_credential(cred, &dummy); 1551 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1552 1553 wpabuf_put_be16(msg, ATTR_CRED); 1554 wpabuf_put_be16(msg, wpabuf_len(cred)); 1555 wpabuf_put_buf(msg, cred); 1556 1557 wpabuf_free(cred); 1558 } 1559#endif /* CONFIG_WPS_TESTING */ 1560 1561 cred = wpabuf_alloc(200); 1562 if (cred == NULL) 1563 return -1; 1564 1565 if (wps_build_credential(cred, &wps->cred)) { 1566 wpabuf_free(cred); 1567 return -1; 1568 } 1569 1570 wpabuf_put_be16(msg, ATTR_CRED); 1571 wpabuf_put_be16(msg, wpabuf_len(cred)); 1572 wpabuf_put_buf(msg, cred); 1573 wpabuf_free(cred); 1574 1575skip_cred_build: 1576 if (wps->wps->registrar->extra_cred) { 1577 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1578 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1579 } 1580 1581 return 0; 1582} 1583 1584 1585static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1586{ 1587 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1588 1589 if (wps_build_credential(msg, &wps->cred)) 1590 return -1; 1591 1592 return 0; 1593} 1594 1595 1596static struct wpabuf * wps_build_m2(struct wps_data *wps) 1597{ 1598 struct wpabuf *msg; 1599 1600 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1601 return NULL; 1602 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1603 wps->nonce_r, WPS_NONCE_LEN); 1604 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1605 1606 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1607 msg = wpabuf_alloc(1000); 1608 if (msg == NULL) 1609 return NULL; 1610 1611 if (wps_build_version(msg) || 1612 wps_build_msg_type(msg, WPS_M2) || 1613 wps_build_enrollee_nonce(wps, msg) || 1614 wps_build_registrar_nonce(wps, msg) || 1615 wps_build_uuid_r(wps, msg) || 1616 wps_build_public_key(wps, msg) || 1617 wps_derive_keys(wps) || 1618 wps_build_auth_type_flags(wps, msg) || 1619 wps_build_encr_type_flags(wps, msg) || 1620 wps_build_conn_type_flags(wps, msg) || 1621 wps_build_config_methods_r(wps->wps->registrar, msg) || 1622 wps_build_device_attrs(&wps->wps->dev, msg) || 1623 wps_build_rf_bands(&wps->wps->dev, msg) || 1624 wps_build_assoc_state(wps, msg) || 1625 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1626 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1627 wps_build_os_version(&wps->wps->dev, msg) || 1628 wps_build_wfa_ext(msg, 0, NULL, 0) || 1629 wps_build_authenticator(wps, msg)) { 1630 wpabuf_free(msg); 1631 return NULL; 1632 } 1633 1634 wps->int_reg = 1; 1635 wps->state = RECV_M3; 1636 return msg; 1637} 1638 1639 1640static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1641{ 1642 struct wpabuf *msg; 1643 u16 err = wps->config_error; 1644 1645 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1646 msg = wpabuf_alloc(1000); 1647 if (msg == NULL) 1648 return NULL; 1649 1650 if (wps->wps->ap && wps->wps->ap_setup_locked && 1651 err == WPS_CFG_NO_ERROR) 1652 err = WPS_CFG_SETUP_LOCKED; 1653 1654 if (wps_build_version(msg) || 1655 wps_build_msg_type(msg, WPS_M2D) || 1656 wps_build_enrollee_nonce(wps, msg) || 1657 wps_build_registrar_nonce(wps, msg) || 1658 wps_build_uuid_r(wps, msg) || 1659 wps_build_auth_type_flags(wps, msg) || 1660 wps_build_encr_type_flags(wps, msg) || 1661 wps_build_conn_type_flags(wps, msg) || 1662 wps_build_config_methods_r(wps->wps->registrar, msg) || 1663 wps_build_device_attrs(&wps->wps->dev, msg) || 1664 wps_build_rf_bands(&wps->wps->dev, msg) || 1665 wps_build_assoc_state(wps, msg) || 1666 wps_build_config_error(msg, err) || 1667 wps_build_os_version(&wps->wps->dev, msg) || 1668 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1669 wpabuf_free(msg); 1670 return NULL; 1671 } 1672 1673 wps->state = RECV_M2D_ACK; 1674 return msg; 1675} 1676 1677 1678static struct wpabuf * wps_build_m4(struct wps_data *wps) 1679{ 1680 struct wpabuf *msg, *plain; 1681 1682 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1683 1684 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1685 1686 plain = wpabuf_alloc(200); 1687 if (plain == NULL) 1688 return NULL; 1689 1690 msg = wpabuf_alloc(1000); 1691 if (msg == NULL) { 1692 wpabuf_free(plain); 1693 return NULL; 1694 } 1695 1696 if (wps_build_version(msg) || 1697 wps_build_msg_type(msg, WPS_M4) || 1698 wps_build_enrollee_nonce(wps, msg) || 1699 wps_build_r_hash(wps, msg) || 1700 wps_build_r_snonce1(wps, plain) || 1701 wps_build_key_wrap_auth(wps, plain) || 1702 wps_build_encr_settings(wps, msg, plain) || 1703 wps_build_wfa_ext(msg, 0, NULL, 0) || 1704 wps_build_authenticator(wps, msg)) { 1705 wpabuf_free(plain); 1706 wpabuf_free(msg); 1707 return NULL; 1708 } 1709 wpabuf_free(plain); 1710 1711 wps->state = RECV_M5; 1712 return msg; 1713} 1714 1715 1716static struct wpabuf * wps_build_m6(struct wps_data *wps) 1717{ 1718 struct wpabuf *msg, *plain; 1719 1720 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1721 1722 plain = wpabuf_alloc(200); 1723 if (plain == NULL) 1724 return NULL; 1725 1726 msg = wpabuf_alloc(1000); 1727 if (msg == NULL) { 1728 wpabuf_free(plain); 1729 return NULL; 1730 } 1731 1732 if (wps_build_version(msg) || 1733 wps_build_msg_type(msg, WPS_M6) || 1734 wps_build_enrollee_nonce(wps, msg) || 1735 wps_build_r_snonce2(wps, plain) || 1736 wps_build_key_wrap_auth(wps, plain) || 1737 wps_build_encr_settings(wps, msg, plain) || 1738 wps_build_wfa_ext(msg, 0, NULL, 0) || 1739 wps_build_authenticator(wps, msg)) { 1740 wpabuf_free(plain); 1741 wpabuf_free(msg); 1742 return NULL; 1743 } 1744 wpabuf_free(plain); 1745 1746 wps->wps_pin_revealed = 1; 1747 wps->state = RECV_M7; 1748 return msg; 1749} 1750 1751 1752static struct wpabuf * wps_build_m8(struct wps_data *wps) 1753{ 1754 struct wpabuf *msg, *plain; 1755 1756 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1757 1758 plain = wpabuf_alloc(500); 1759 if (plain == NULL) 1760 return NULL; 1761 1762 msg = wpabuf_alloc(1000); 1763 if (msg == NULL) { 1764 wpabuf_free(plain); 1765 return NULL; 1766 } 1767 1768 if (wps_build_version(msg) || 1769 wps_build_msg_type(msg, WPS_M8) || 1770 wps_build_enrollee_nonce(wps, msg) || 1771 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1772 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1773 wps_build_key_wrap_auth(wps, plain) || 1774 wps_build_encr_settings(wps, msg, plain) || 1775 wps_build_wfa_ext(msg, 0, NULL, 0) || 1776 wps_build_authenticator(wps, msg)) { 1777 wpabuf_free(plain); 1778 wpabuf_free(msg); 1779 return NULL; 1780 } 1781 wpabuf_free(plain); 1782 1783 wps->state = RECV_DONE; 1784 return msg; 1785} 1786 1787 1788struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1789 enum wsc_op_code *op_code) 1790{ 1791 struct wpabuf *msg; 1792 1793#ifdef CONFIG_WPS_UPNP 1794 if (!wps->int_reg && wps->wps->wps_upnp) { 1795 struct upnp_pending_message *p, *prev = NULL; 1796 if (wps->ext_reg > 1) 1797 wps_registrar_free_pending_m2(wps->wps); 1798 p = wps->wps->upnp_msgs; 1799 /* TODO: check pending message MAC address */ 1800 while (p && p->next) { 1801 prev = p; 1802 p = p->next; 1803 } 1804 if (p) { 1805 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1806 "UPnP"); 1807 if (prev) 1808 prev->next = NULL; 1809 else 1810 wps->wps->upnp_msgs = NULL; 1811 msg = p->msg; 1812 switch (p->type) { 1813 case WPS_WSC_ACK: 1814 *op_code = WSC_ACK; 1815 break; 1816 case WPS_WSC_NACK: 1817 *op_code = WSC_NACK; 1818 break; 1819 default: 1820 *op_code = WSC_MSG; 1821 break; 1822 } 1823 os_free(p); 1824 if (wps->ext_reg == 0) 1825 wps->ext_reg = 1; 1826 return msg; 1827 } 1828 } 1829 if (wps->ext_reg) { 1830 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 1831 "pending message available"); 1832 return NULL; 1833 } 1834#endif /* CONFIG_WPS_UPNP */ 1835 1836 switch (wps->state) { 1837 case SEND_M2: 1838 if (wps_get_dev_password(wps) < 0) 1839 msg = wps_build_m2d(wps); 1840 else 1841 msg = wps_build_m2(wps); 1842 *op_code = WSC_MSG; 1843 break; 1844 case SEND_M2D: 1845 msg = wps_build_m2d(wps); 1846 *op_code = WSC_MSG; 1847 break; 1848 case SEND_M4: 1849 msg = wps_build_m4(wps); 1850 *op_code = WSC_MSG; 1851 break; 1852 case SEND_M6: 1853 msg = wps_build_m6(wps); 1854 *op_code = WSC_MSG; 1855 break; 1856 case SEND_M8: 1857 msg = wps_build_m8(wps); 1858 *op_code = WSC_MSG; 1859 break; 1860 case RECV_DONE: 1861 msg = wps_build_wsc_ack(wps); 1862 *op_code = WSC_ACK; 1863 break; 1864 case SEND_WSC_NACK: 1865 msg = wps_build_wsc_nack(wps); 1866 *op_code = WSC_NACK; 1867 break; 1868 default: 1869 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 1870 "a message", wps->state); 1871 msg = NULL; 1872 break; 1873 } 1874 1875 if (*op_code == WSC_MSG && msg) { 1876 /* Save a copy of the last message for Authenticator derivation 1877 */ 1878 wpabuf_free(wps->last_msg); 1879 wps->last_msg = wpabuf_dup(msg); 1880 } 1881 1882 return msg; 1883} 1884 1885 1886static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 1887{ 1888 if (e_nonce == NULL) { 1889 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 1890 return -1; 1891 } 1892 1893 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 1894 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 1895 wps->nonce_e, WPS_NONCE_LEN); 1896 1897 return 0; 1898} 1899 1900 1901static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 1902{ 1903 if (r_nonce == NULL) { 1904 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 1905 return -1; 1906 } 1907 1908 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 1909 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 1910 return -1; 1911 } 1912 1913 return 0; 1914} 1915 1916 1917static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 1918{ 1919 if (uuid_e == NULL) { 1920 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 1921 return -1; 1922 } 1923 1924 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 1925 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 1926 1927 return 0; 1928} 1929 1930 1931static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 1932{ 1933 if (pw_id == NULL) { 1934 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 1935 return -1; 1936 } 1937 1938 wps->dev_pw_id = WPA_GET_BE16(pw_id); 1939 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 1940 1941 return 0; 1942} 1943 1944 1945static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 1946{ 1947 if (e_hash1 == NULL) { 1948 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 1949 return -1; 1950 } 1951 1952 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 1953 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 1954 1955 return 0; 1956} 1957 1958 1959static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 1960{ 1961 if (e_hash2 == NULL) { 1962 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 1963 return -1; 1964 } 1965 1966 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 1967 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 1968 1969 return 0; 1970} 1971 1972 1973static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 1974{ 1975 u8 hash[SHA256_MAC_LEN]; 1976 const u8 *addr[4]; 1977 size_t len[4]; 1978 1979 if (e_snonce1 == NULL) { 1980 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 1981 return -1; 1982 } 1983 1984 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 1985 WPS_SECRET_NONCE_LEN); 1986 1987 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 1988 addr[0] = e_snonce1; 1989 len[0] = WPS_SECRET_NONCE_LEN; 1990 addr[1] = wps->psk1; 1991 len[1] = WPS_PSK_LEN; 1992 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1993 len[2] = wpabuf_len(wps->dh_pubkey_e); 1994 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1995 len[3] = wpabuf_len(wps->dh_pubkey_r); 1996 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1997 1998 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 1999 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2000 "not match with the pre-committed value"); 2001 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2002 wps_pwd_auth_fail_event(wps->wps, 0, 1); 2003 return -1; 2004 } 2005 2006 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2007 "half of the device password"); 2008 2009 return 0; 2010} 2011 2012 2013static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2014{ 2015 u8 hash[SHA256_MAC_LEN]; 2016 const u8 *addr[4]; 2017 size_t len[4]; 2018 2019 if (e_snonce2 == NULL) { 2020 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2021 return -1; 2022 } 2023 2024 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2025 WPS_SECRET_NONCE_LEN); 2026 2027 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2028 addr[0] = e_snonce2; 2029 len[0] = WPS_SECRET_NONCE_LEN; 2030 addr[1] = wps->psk2; 2031 len[1] = WPS_PSK_LEN; 2032 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2033 len[2] = wpabuf_len(wps->dh_pubkey_e); 2034 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2035 len[3] = wpabuf_len(wps->dh_pubkey_r); 2036 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2037 2038 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2039 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2040 "not match with the pre-committed value"); 2041 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2042 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2043 wps_pwd_auth_fail_event(wps->wps, 0, 2); 2044 return -1; 2045 } 2046 2047 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2048 "half of the device password"); 2049 wps->wps_pin_revealed = 0; 2050 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2051 2052 return 0; 2053} 2054 2055 2056static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2057{ 2058 if (mac_addr == NULL) { 2059 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2060 return -1; 2061 } 2062 2063 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2064 MAC2STR(mac_addr)); 2065 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2066 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2067 2068 return 0; 2069} 2070 2071 2072static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2073 size_t pk_len) 2074{ 2075 if (pk == NULL || pk_len == 0) { 2076 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2077 return -1; 2078 } 2079 2080#ifdef CONFIG_WPS_OOB 2081 if (wps->wps->oob_conf.pubkey_hash != NULL) { 2082 const u8 *addr[1]; 2083 u8 hash[WPS_HASH_LEN]; 2084 2085 addr[0] = pk; 2086 sha256_vector(1, addr, &pk_len, hash); 2087 if (os_memcmp(hash, 2088 wpabuf_head(wps->wps->oob_conf.pubkey_hash), 2089 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2090 wpa_printf(MSG_ERROR, "WPS: Public Key hash error"); 2091 return -1; 2092 } 2093 } 2094#endif /* CONFIG_WPS_OOB */ 2095 2096 wpabuf_free(wps->dh_pubkey_e); 2097 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2098 if (wps->dh_pubkey_e == NULL) 2099 return -1; 2100 2101 return 0; 2102} 2103 2104 2105static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2106{ 2107 u16 auth_types; 2108 2109 if (auth == NULL) { 2110 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2111 "received"); 2112 return -1; 2113 } 2114 2115 auth_types = WPA_GET_BE16(auth); 2116 2117 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2118 auth_types); 2119 wps->auth_type = wps->wps->auth_types & auth_types; 2120 if (wps->auth_type == 0) { 2121 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2122 "authentication types (own 0x%x Enrollee 0x%x)", 2123 wps->wps->auth_types, auth_types); 2124#ifdef WPS_WORKAROUNDS 2125 /* 2126 * Some deployed implementations seem to advertise incorrect 2127 * information in this attribute. For example, Linksys WRT350N 2128 * seems to have a byteorder bug that breaks this negotiation. 2129 * In order to interoperate with existing implementations, 2130 * assume that the Enrollee supports everything we do. 2131 */ 2132 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2133 "does not advertise supported authentication types " 2134 "correctly"); 2135 wps->auth_type = wps->wps->auth_types; 2136#else /* WPS_WORKAROUNDS */ 2137 return -1; 2138#endif /* WPS_WORKAROUNDS */ 2139 } 2140 2141 return 0; 2142} 2143 2144 2145static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2146{ 2147 u16 encr_types; 2148 2149 if (encr == NULL) { 2150 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2151 "received"); 2152 return -1; 2153 } 2154 2155 encr_types = WPA_GET_BE16(encr); 2156 2157 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2158 encr_types); 2159 wps->encr_type = wps->wps->encr_types & encr_types; 2160 if (wps->encr_type == 0) { 2161 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2162 "encryption types (own 0x%x Enrollee 0x%x)", 2163 wps->wps->encr_types, encr_types); 2164#ifdef WPS_WORKAROUNDS 2165 /* 2166 * Some deployed implementations seem to advertise incorrect 2167 * information in this attribute. For example, Linksys WRT350N 2168 * seems to have a byteorder bug that breaks this negotiation. 2169 * In order to interoperate with existing implementations, 2170 * assume that the Enrollee supports everything we do. 2171 */ 2172 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2173 "does not advertise supported encryption types " 2174 "correctly"); 2175 wps->encr_type = wps->wps->encr_types; 2176#else /* WPS_WORKAROUNDS */ 2177 return -1; 2178#endif /* WPS_WORKAROUNDS */ 2179 } 2180 2181 return 0; 2182} 2183 2184 2185static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2186{ 2187 if (conn == NULL) { 2188 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2189 "received"); 2190 return -1; 2191 } 2192 2193 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2194 *conn); 2195 2196 return 0; 2197} 2198 2199 2200static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2201{ 2202 u16 m; 2203 2204 if (methods == NULL) { 2205 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2206 return -1; 2207 } 2208 2209 m = WPA_GET_BE16(methods); 2210 2211 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2212 "%s%s%s%s%s%s%s%s%s", m, 2213 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2214 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2215 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2216 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2217 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2218 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2219 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2220 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2221 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2222 2223 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2224 /* 2225 * The Enrollee does not have a display so it is unlikely to be 2226 * able to show the passphrase to a user and as such, could 2227 * benefit from receiving PSK to reduce key derivation time. 2228 */ 2229 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2230 "Enrollee not supporting display"); 2231 wps->use_psk_key = 1; 2232 } 2233 2234 return 0; 2235} 2236 2237 2238static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2239{ 2240 if (state == NULL) { 2241 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2242 "received"); 2243 return -1; 2244 } 2245 2246 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2247 *state); 2248 2249 return 0; 2250} 2251 2252 2253static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2254{ 2255 u16 a; 2256 2257 if (assoc == NULL) { 2258 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2259 return -1; 2260 } 2261 2262 a = WPA_GET_BE16(assoc); 2263 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2264 2265 return 0; 2266} 2267 2268 2269static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2270{ 2271 u16 e; 2272 2273 if (err == NULL) { 2274 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2275 return -1; 2276 } 2277 2278 e = WPA_GET_BE16(err); 2279 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2280 2281 return 0; 2282} 2283 2284 2285static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2286{ 2287#ifdef CONFIG_P2P 2288 struct wps_registrar *reg = wps->wps->registrar; 2289 2290 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2291 return 1; /* no filtering in use */ 2292 2293 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2294 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2295 "filtering for PBC: expected " MACSTR " was " 2296 MACSTR " - indicate PBC session overlap", 2297 MAC2STR(reg->p2p_dev_addr), 2298 MAC2STR(wps->p2p_dev_addr)); 2299 return 0; 2300 } 2301#endif /* CONFIG_P2P */ 2302 return 1; 2303} 2304 2305 2306static int wps_registrar_skip_overlap(struct wps_data *wps) 2307{ 2308#ifdef CONFIG_P2P 2309 struct wps_registrar *reg = wps->wps->registrar; 2310 2311 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2312 return 0; /* no specific Enrollee selected */ 2313 2314 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2315 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2316 "Enrollee match"); 2317 return 1; 2318 } 2319#endif /* CONFIG_P2P */ 2320 return 0; 2321} 2322 2323 2324static enum wps_process_res wps_process_m1(struct wps_data *wps, 2325 struct wps_parse_attr *attr) 2326{ 2327 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2328 2329 if (wps->state != RECV_M1) { 2330 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2331 "receiving M1", wps->state); 2332 return WPS_FAILURE; 2333 } 2334 2335 if (wps_process_uuid_e(wps, attr->uuid_e) || 2336 wps_process_mac_addr(wps, attr->mac_addr) || 2337 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2338 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2339 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2340 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2341 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2342 wps_process_config_methods(wps, attr->config_methods) || 2343 wps_process_wps_state(wps, attr->wps_state) || 2344 wps_process_device_attrs(&wps->peer_dev, attr) || 2345 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2346 wps_process_assoc_state(wps, attr->assoc_state) || 2347 wps_process_dev_password_id(wps, attr->dev_password_id) || 2348 wps_process_config_error(wps, attr->config_error) || 2349 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2350 return WPS_FAILURE; 2351 2352 if (wps->dev_pw_id < 0x10 && 2353 wps->dev_pw_id != DEV_PW_DEFAULT && 2354 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2355 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2356 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2357 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2358 !wps->wps->registrar->pbc)) { 2359 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2360 wps->dev_pw_id); 2361 wps->state = SEND_M2D; 2362 return WPS_CONTINUE; 2363 } 2364 2365#ifdef CONFIG_WPS_OOB 2366 if (wps->dev_pw_id >= 0x10 && 2367 wps->dev_pw_id != wps->wps->oob_dev_pw_id) { 2368 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID " 2369 "%d mismatch", wps->dev_pw_id); 2370 wps->state = SEND_M2D; 2371 return WPS_CONTINUE; 2372 } 2373#endif /* CONFIG_WPS_OOB */ 2374 2375 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2376 if ((wps->wps->registrar->force_pbc_overlap || 2377 wps_registrar_pbc_overlap(wps->wps->registrar, 2378 wps->mac_addr_e, wps->uuid_e) || 2379 !wps_registrar_p2p_dev_addr_match(wps)) && 2380 !wps_registrar_skip_overlap(wps)) { 2381 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2382 "negotiation"); 2383 wps->state = SEND_M2D; 2384 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2385 wps_pbc_overlap_event(wps->wps); 2386 wps_fail_event(wps->wps, WPS_M1, 2387 WPS_CFG_MULTIPLE_PBC_DETECTED, 2388 WPS_EI_NO_ERROR); 2389 wps->wps->registrar->force_pbc_overlap = 1; 2390 return WPS_CONTINUE; 2391 } 2392 wps_registrar_add_pbc_session(wps->wps->registrar, 2393 wps->mac_addr_e, wps->uuid_e); 2394 wps->pbc = 1; 2395 } 2396 2397#ifdef WPS_WORKAROUNDS 2398 /* 2399 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2400 * passphrase format. To avoid interop issues, force PSK format to be 2401 * used. 2402 */ 2403 if (!wps->use_psk_key && 2404 wps->peer_dev.manufacturer && 2405 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2406 wps->peer_dev.model_name && 2407 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2408 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2409 "PSK format"); 2410 wps->use_psk_key = 1; 2411 } 2412#endif /* WPS_WORKAROUNDS */ 2413 2414 wps->state = SEND_M2; 2415 return WPS_CONTINUE; 2416} 2417 2418 2419static enum wps_process_res wps_process_m3(struct wps_data *wps, 2420 const struct wpabuf *msg, 2421 struct wps_parse_attr *attr) 2422{ 2423 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2424 2425 if (wps->state != RECV_M3) { 2426 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2427 "receiving M3", wps->state); 2428 wps->state = SEND_WSC_NACK; 2429 return WPS_CONTINUE; 2430 } 2431 2432 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2433 !wps_registrar_skip_overlap(wps)) { 2434 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2435 "session overlap"); 2436 wps->state = SEND_WSC_NACK; 2437 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2438 return WPS_CONTINUE; 2439 } 2440 2441 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2442 wps_process_authenticator(wps, attr->authenticator, msg) || 2443 wps_process_e_hash1(wps, attr->e_hash1) || 2444 wps_process_e_hash2(wps, attr->e_hash2)) { 2445 wps->state = SEND_WSC_NACK; 2446 return WPS_CONTINUE; 2447 } 2448 2449 wps->state = SEND_M4; 2450 return WPS_CONTINUE; 2451} 2452 2453 2454static enum wps_process_res wps_process_m5(struct wps_data *wps, 2455 const struct wpabuf *msg, 2456 struct wps_parse_attr *attr) 2457{ 2458 struct wpabuf *decrypted; 2459 struct wps_parse_attr eattr; 2460 2461 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2462 2463 if (wps->state != RECV_M5) { 2464 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2465 "receiving M5", wps->state); 2466 wps->state = SEND_WSC_NACK; 2467 return WPS_CONTINUE; 2468 } 2469 2470 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2471 !wps_registrar_skip_overlap(wps)) { 2472 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2473 "session overlap"); 2474 wps->state = SEND_WSC_NACK; 2475 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2476 return WPS_CONTINUE; 2477 } 2478 2479 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2480 wps_process_authenticator(wps, attr->authenticator, msg)) { 2481 wps->state = SEND_WSC_NACK; 2482 return WPS_CONTINUE; 2483 } 2484 2485 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2486 attr->encr_settings_len); 2487 if (decrypted == NULL) { 2488 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2489 "Settings attribute"); 2490 wps->state = SEND_WSC_NACK; 2491 return WPS_CONTINUE; 2492 } 2493 2494 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2495 wpabuf_free(decrypted); 2496 wps->state = SEND_WSC_NACK; 2497 return WPS_CONTINUE; 2498 } 2499 2500 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2501 "attribute"); 2502 if (wps_parse_msg(decrypted, &eattr) < 0 || 2503 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2504 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2505 wpabuf_free(decrypted); 2506 wps->state = SEND_WSC_NACK; 2507 return WPS_CONTINUE; 2508 } 2509 wpabuf_free(decrypted); 2510 2511 wps->state = SEND_M6; 2512 return WPS_CONTINUE; 2513} 2514 2515 2516static void wps_sta_cred_cb(struct wps_data *wps) 2517{ 2518 /* 2519 * Update credential to only include a single authentication and 2520 * encryption type in case the AP configuration includes more than one 2521 * option. 2522 */ 2523 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2524 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2525 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2526 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2527 if (wps->cred.encr_type & WPS_ENCR_AES) 2528 wps->cred.encr_type = WPS_ENCR_AES; 2529 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2530 wps->cred.encr_type = WPS_ENCR_TKIP; 2531 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2532 "AP configuration"); 2533 if (wps->wps->cred_cb) 2534 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2535} 2536 2537 2538static void wps_cred_update(struct wps_credential *dst, 2539 struct wps_credential *src) 2540{ 2541 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2542 dst->ssid_len = src->ssid_len; 2543 dst->auth_type = src->auth_type; 2544 dst->encr_type = src->encr_type; 2545 dst->key_idx = src->key_idx; 2546 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2547 dst->key_len = src->key_len; 2548} 2549 2550 2551static int wps_process_ap_settings_r(struct wps_data *wps, 2552 struct wps_parse_attr *attr) 2553{ 2554 if (wps->wps->ap || wps->er) 2555 return 0; 2556 2557 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2558 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2559 return -1; 2560 2561 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2562 2563 if (wps->new_ap_settings) { 2564 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2565 "new settings"); 2566 wps_cred_update(&wps->cred, wps->new_ap_settings); 2567 return 0; 2568 } else { 2569 /* 2570 * Use the AP PIN only to receive the current AP settings, not 2571 * to reconfigure the AP. 2572 */ 2573 2574 /* 2575 * Clear selected registrar here since we do not get to 2576 * WSC_Done in this protocol run. 2577 */ 2578 wps_registrar_pin_completed(wps->wps->registrar); 2579 2580 if (wps->ap_settings_cb) { 2581 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2582 &wps->cred); 2583 return 1; 2584 } 2585 wps_sta_cred_cb(wps); 2586 return 1; 2587 } 2588} 2589 2590 2591static enum wps_process_res wps_process_m7(struct wps_data *wps, 2592 const struct wpabuf *msg, 2593 struct wps_parse_attr *attr) 2594{ 2595 struct wpabuf *decrypted; 2596 struct wps_parse_attr eattr; 2597 2598 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2599 2600 if (wps->state != RECV_M7) { 2601 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2602 "receiving M7", wps->state); 2603 wps->state = SEND_WSC_NACK; 2604 return WPS_CONTINUE; 2605 } 2606 2607 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2608 !wps_registrar_skip_overlap(wps)) { 2609 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2610 "session overlap"); 2611 wps->state = SEND_WSC_NACK; 2612 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2613 return WPS_CONTINUE; 2614 } 2615 2616 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2617 wps_process_authenticator(wps, attr->authenticator, msg)) { 2618 wps->state = SEND_WSC_NACK; 2619 return WPS_CONTINUE; 2620 } 2621 2622 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2623 attr->encr_settings_len); 2624 if (decrypted == NULL) { 2625 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2626 "Settings attribute"); 2627 wps->state = SEND_WSC_NACK; 2628 return WPS_CONTINUE; 2629 } 2630 2631 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2632 attr->version2 != NULL) < 0) { 2633 wpabuf_free(decrypted); 2634 wps->state = SEND_WSC_NACK; 2635 return WPS_CONTINUE; 2636 } 2637 2638 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2639 "attribute"); 2640 if (wps_parse_msg(decrypted, &eattr) < 0 || 2641 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2642 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2643 wps_process_ap_settings_r(wps, &eattr)) { 2644 wpabuf_free(decrypted); 2645 wps->state = SEND_WSC_NACK; 2646 return WPS_CONTINUE; 2647 } 2648 2649 wpabuf_free(decrypted); 2650 2651 wps->state = SEND_M8; 2652 return WPS_CONTINUE; 2653} 2654 2655 2656static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2657 const struct wpabuf *msg) 2658{ 2659 struct wps_parse_attr attr; 2660 enum wps_process_res ret = WPS_CONTINUE; 2661 2662 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2663 2664 if (wps_parse_msg(msg, &attr) < 0) 2665 return WPS_FAILURE; 2666 2667 if (attr.msg_type == NULL) { 2668 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2669 wps->state = SEND_WSC_NACK; 2670 return WPS_CONTINUE; 2671 } 2672 2673 if (*attr.msg_type != WPS_M1 && 2674 (attr.registrar_nonce == NULL || 2675 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2676 WPS_NONCE_LEN != 0))) { 2677 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2678 return WPS_FAILURE; 2679 } 2680 2681 switch (*attr.msg_type) { 2682 case WPS_M1: 2683 if (wps_validate_m1(msg) < 0) 2684 return WPS_FAILURE; 2685#ifdef CONFIG_WPS_UPNP 2686 if (wps->wps->wps_upnp && attr.mac_addr) { 2687 /* Remove old pending messages when starting new run */ 2688 wps_free_pending_msgs(wps->wps->upnp_msgs); 2689 wps->wps->upnp_msgs = NULL; 2690 2691 upnp_wps_device_send_wlan_event( 2692 wps->wps->wps_upnp, attr.mac_addr, 2693 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2694 } 2695#endif /* CONFIG_WPS_UPNP */ 2696 ret = wps_process_m1(wps, &attr); 2697 break; 2698 case WPS_M3: 2699 if (wps_validate_m3(msg) < 0) 2700 return WPS_FAILURE; 2701 ret = wps_process_m3(wps, msg, &attr); 2702 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2703 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2704 wps->error_indication); 2705 break; 2706 case WPS_M5: 2707 if (wps_validate_m5(msg) < 0) 2708 return WPS_FAILURE; 2709 ret = wps_process_m5(wps, msg, &attr); 2710 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2711 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2712 wps->error_indication); 2713 break; 2714 case WPS_M7: 2715 if (wps_validate_m7(msg) < 0) 2716 return WPS_FAILURE; 2717 ret = wps_process_m7(wps, msg, &attr); 2718 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2719 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2720 wps->error_indication); 2721 break; 2722 default: 2723 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2724 *attr.msg_type); 2725 return WPS_FAILURE; 2726 } 2727 2728 if (ret == WPS_CONTINUE) { 2729 /* Save a copy of the last message for Authenticator derivation 2730 */ 2731 wpabuf_free(wps->last_msg); 2732 wps->last_msg = wpabuf_dup(msg); 2733 } 2734 2735 return ret; 2736} 2737 2738 2739static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2740 const struct wpabuf *msg) 2741{ 2742 struct wps_parse_attr attr; 2743 2744 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2745 2746 if (wps_parse_msg(msg, &attr) < 0) 2747 return WPS_FAILURE; 2748 2749 if (attr.msg_type == NULL) { 2750 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2751 return WPS_FAILURE; 2752 } 2753 2754 if (*attr.msg_type != WPS_WSC_ACK) { 2755 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2756 *attr.msg_type); 2757 return WPS_FAILURE; 2758 } 2759 2760#ifdef CONFIG_WPS_UPNP 2761 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2762 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2763 if (wps->wps->upnp_msgs) 2764 return WPS_CONTINUE; 2765 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2766 "external Registrar"); 2767 return WPS_PENDING; 2768 } 2769#endif /* CONFIG_WPS_UPNP */ 2770 2771 if (attr.registrar_nonce == NULL || 2772 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2773 { 2774 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2775 return WPS_FAILURE; 2776 } 2777 2778 if (attr.enrollee_nonce == NULL || 2779 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2780 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2781 return WPS_FAILURE; 2782 } 2783 2784 if (wps->state == RECV_M2D_ACK) { 2785#ifdef CONFIG_WPS_UPNP 2786 if (wps->wps->wps_upnp && 2787 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2788 if (wps->wps->upnp_msgs) 2789 return WPS_CONTINUE; 2790 if (wps->ext_reg == 0) 2791 wps->ext_reg = 1; 2792 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2793 "external Registrar"); 2794 return WPS_PENDING; 2795 } 2796#endif /* CONFIG_WPS_UPNP */ 2797 2798 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 2799 "terminate negotiation"); 2800 } 2801 2802 return WPS_FAILURE; 2803} 2804 2805 2806static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 2807 const struct wpabuf *msg) 2808{ 2809 struct wps_parse_attr attr; 2810 int old_state; 2811 u16 config_error; 2812 2813 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 2814 2815 old_state = wps->state; 2816 wps->state = SEND_WSC_NACK; 2817 2818 if (wps_parse_msg(msg, &attr) < 0) 2819 return WPS_FAILURE; 2820 2821 if (attr.msg_type == NULL) { 2822 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2823 return WPS_FAILURE; 2824 } 2825 2826 if (*attr.msg_type != WPS_WSC_NACK) { 2827 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2828 *attr.msg_type); 2829 return WPS_FAILURE; 2830 } 2831 2832#ifdef CONFIG_WPS_UPNP 2833 if (wps->wps->wps_upnp && wps->ext_reg) { 2834 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 2835 "Registrar terminated by the Enrollee"); 2836 return WPS_FAILURE; 2837 } 2838#endif /* CONFIG_WPS_UPNP */ 2839 2840 if (attr.registrar_nonce == NULL || 2841 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2842 { 2843 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2844 return WPS_FAILURE; 2845 } 2846 2847 if (attr.enrollee_nonce == NULL || 2848 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2849 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2850 return WPS_FAILURE; 2851 } 2852 2853 if (attr.config_error == NULL) { 2854 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 2855 "in WSC_NACK"); 2856 return WPS_FAILURE; 2857 } 2858 2859 config_error = WPA_GET_BE16(attr.config_error); 2860 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 2861 "Configuration Error %d", config_error); 2862 2863 switch (old_state) { 2864 case RECV_M3: 2865 wps_fail_event(wps->wps, WPS_M2, config_error, 2866 wps->error_indication); 2867 break; 2868 case RECV_M5: 2869 wps_fail_event(wps->wps, WPS_M4, config_error, 2870 wps->error_indication); 2871 break; 2872 case RECV_M7: 2873 wps_fail_event(wps->wps, WPS_M6, config_error, 2874 wps->error_indication); 2875 break; 2876 case RECV_DONE: 2877 wps_fail_event(wps->wps, WPS_M8, config_error, 2878 wps->error_indication); 2879 break; 2880 default: 2881 break; 2882 } 2883 2884 return WPS_FAILURE; 2885} 2886 2887 2888static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 2889 const struct wpabuf *msg) 2890{ 2891 struct wps_parse_attr attr; 2892 2893 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 2894 2895 if (wps->state != RECV_DONE && 2896 (!wps->wps->wps_upnp || !wps->ext_reg)) { 2897 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2898 "receiving WSC_Done", wps->state); 2899 return WPS_FAILURE; 2900 } 2901 2902 if (wps_parse_msg(msg, &attr) < 0) 2903 return WPS_FAILURE; 2904 2905 if (attr.msg_type == NULL) { 2906 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2907 return WPS_FAILURE; 2908 } 2909 2910 if (*attr.msg_type != WPS_WSC_DONE) { 2911 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2912 *attr.msg_type); 2913 return WPS_FAILURE; 2914 } 2915 2916#ifdef CONFIG_WPS_UPNP 2917 if (wps->wps->wps_upnp && wps->ext_reg) { 2918 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 2919 "Registrar completed successfully"); 2920 wps_device_store(wps->wps->registrar, &wps->peer_dev, 2921 wps->uuid_e); 2922 return WPS_DONE; 2923 } 2924#endif /* CONFIG_WPS_UPNP */ 2925 2926 if (attr.registrar_nonce == NULL || 2927 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2928 { 2929 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2930 return WPS_FAILURE; 2931 } 2932 2933 if (attr.enrollee_nonce == NULL || 2934 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2935 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2936 return WPS_FAILURE; 2937 } 2938 2939 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 2940 wps_device_store(wps->wps->registrar, &wps->peer_dev, 2941 wps->uuid_e); 2942 2943 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 2944 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 2945 struct wps_credential cred; 2946 2947 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 2948 "on first Enrollee connection"); 2949 2950 os_memset(&cred, 0, sizeof(cred)); 2951 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 2952 cred.ssid_len = wps->wps->ssid_len; 2953 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 2954 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 2955 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 2956 cred.key_len = wps->new_psk_len; 2957 2958 wps->wps->wps_state = WPS_STATE_CONFIGURED; 2959 wpa_hexdump_ascii_key(MSG_DEBUG, 2960 "WPS: Generated random passphrase", 2961 wps->new_psk, wps->new_psk_len); 2962 if (wps->wps->cred_cb) 2963 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 2964 2965 os_free(wps->new_psk); 2966 wps->new_psk = NULL; 2967 } 2968 2969 if (!wps->wps->ap && !wps->er) 2970 wps_sta_cred_cb(wps); 2971 2972 if (wps->new_psk) { 2973 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 2974 wps->new_psk, wps->new_psk_len)) { 2975 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 2976 "new PSK"); 2977 } 2978 os_free(wps->new_psk); 2979 wps->new_psk = NULL; 2980 } 2981 2982 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e); 2983 2984 if (wps->pbc) { 2985 wps_registrar_remove_pbc_session(wps->wps->registrar, 2986 wps->uuid_e); 2987 wps_registrar_pbc_completed(wps->wps->registrar); 2988 } else { 2989 wps_registrar_pin_completed(wps->wps->registrar); 2990 } 2991 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 2992 * merge them into APs own list.. */ 2993 2994 wps_success_event(wps->wps); 2995 2996 return WPS_DONE; 2997} 2998 2999 3000enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3001 enum wsc_op_code op_code, 3002 const struct wpabuf *msg) 3003{ 3004 enum wps_process_res ret; 3005 3006 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3007 "op_code=%d)", 3008 (unsigned long) wpabuf_len(msg), op_code); 3009 3010#ifdef CONFIG_WPS_UPNP 3011 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3012 struct wps_parse_attr attr; 3013 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3014 *attr.msg_type == WPS_M3) 3015 wps->ext_reg = 2; /* past M2/M2D phase */ 3016 } 3017 if (wps->ext_reg > 1) 3018 wps_registrar_free_pending_m2(wps->wps); 3019 if (wps->wps->wps_upnp && wps->ext_reg && 3020 wps->wps->upnp_msgs == NULL && 3021 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3022 { 3023 struct wps_parse_attr attr; 3024 int type; 3025 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3026 type = -1; 3027 else 3028 type = *attr.msg_type; 3029 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3030 " to external Registrar for processing", type); 3031 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3032 wps->mac_addr_e, 3033 UPNP_WPS_WLANEVENT_TYPE_EAP, 3034 msg); 3035 if (op_code == WSC_MSG) 3036 return WPS_PENDING; 3037 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3038 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3039 "external Registrar"); 3040 return WPS_CONTINUE; 3041 } 3042#endif /* CONFIG_WPS_UPNP */ 3043 3044 switch (op_code) { 3045 case WSC_MSG: 3046 return wps_process_wsc_msg(wps, msg); 3047 case WSC_ACK: 3048 if (wps_validate_wsc_ack(msg) < 0) 3049 return WPS_FAILURE; 3050 return wps_process_wsc_ack(wps, msg); 3051 case WSC_NACK: 3052 if (wps_validate_wsc_nack(msg) < 0) 3053 return WPS_FAILURE; 3054 return wps_process_wsc_nack(wps, msg); 3055 case WSC_Done: 3056 if (wps_validate_wsc_done(msg) < 0) 3057 return WPS_FAILURE; 3058 ret = wps_process_wsc_done(wps, msg); 3059 if (ret == WPS_FAILURE) { 3060 wps->state = SEND_WSC_NACK; 3061 wps_fail_event(wps->wps, WPS_WSC_DONE, 3062 wps->config_error, 3063 wps->error_indication); 3064 } 3065 return ret; 3066 default: 3067 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3068 return WPS_FAILURE; 3069 } 3070} 3071 3072 3073int wps_registrar_update_ie(struct wps_registrar *reg) 3074{ 3075 return wps_set_ie(reg); 3076} 3077 3078 3079static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3080 void *timeout_ctx) 3081{ 3082 struct wps_registrar *reg = eloop_ctx; 3083 3084 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3085 "unselect internal Registrar"); 3086 reg->selected_registrar = 0; 3087 reg->pbc = 0; 3088 wps_registrar_selected_registrar_changed(reg); 3089} 3090 3091 3092#ifdef CONFIG_WPS_UPNP 3093static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3094 struct subscription *s) 3095{ 3096 int i, j; 3097 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3098 "config_methods=0x%x)", 3099 s->dev_password_id, s->config_methods); 3100 reg->sel_reg_union = 1; 3101 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3102 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3103 if (reg->sel_reg_config_methods_override == -1) 3104 reg->sel_reg_config_methods_override = 0; 3105 reg->sel_reg_config_methods_override |= s->config_methods; 3106 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3107 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3108 break; 3109 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3110 j++) { 3111 if (is_zero_ether_addr(s->authorized_macs[j])) 3112 break; 3113 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3114 MACSTR, MAC2STR(s->authorized_macs[j])); 3115 os_memcpy(reg->authorized_macs_union[i], 3116 s->authorized_macs[j], ETH_ALEN); 3117 i++; 3118 } 3119 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3120 (u8 *) reg->authorized_macs_union, 3121 sizeof(reg->authorized_macs_union)); 3122} 3123#endif /* CONFIG_WPS_UPNP */ 3124 3125 3126static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3127{ 3128#ifdef CONFIG_WPS_UPNP 3129 struct subscription *s; 3130 3131 if (reg->wps->wps_upnp == NULL) 3132 return; 3133 3134 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3135 struct subscription, list) { 3136 struct subscr_addr *sa; 3137 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3138 if (sa) { 3139 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3140 inet_ntoa(sa->saddr.sin_addr), 3141 ntohs(sa->saddr.sin_port)); 3142 } 3143 if (s->selected_registrar) 3144 wps_registrar_sel_reg_add(reg, s); 3145 else 3146 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3147 "selected"); 3148 } 3149#endif /* CONFIG_WPS_UPNP */ 3150} 3151 3152 3153/** 3154 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3155 * @reg: Registrar data from wps_registrar_init() 3156 * 3157 * This function is called when selected registrar state changes, e.g., when an 3158 * AP receives a SetSelectedRegistrar UPnP message. 3159 */ 3160void wps_registrar_selected_registrar_changed(struct wps_registrar *reg) 3161{ 3162 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3163 3164 reg->sel_reg_union = reg->selected_registrar; 3165 reg->sel_reg_dev_password_id_override = -1; 3166 reg->sel_reg_config_methods_override = -1; 3167 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3168 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3169 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3170 (u8 *) reg->authorized_macs_union, 3171 sizeof(reg->authorized_macs_union)); 3172 if (reg->selected_registrar) { 3173 u16 methods; 3174 3175 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3176#ifdef CONFIG_WPS2 3177 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3178 WPS_CONFIG_PHY_PUSHBUTTON); 3179#endif /* CONFIG_WPS2 */ 3180 if (reg->pbc) { 3181 reg->sel_reg_dev_password_id_override = 3182 DEV_PW_PUSHBUTTON; 3183 wps_set_pushbutton(&methods, reg->wps->config_methods); 3184 } 3185 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3186 "(pbc=%d)", reg->pbc); 3187 reg->sel_reg_config_methods_override = methods; 3188 } else 3189 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3190 3191 wps_registrar_sel_reg_union(reg); 3192 3193 wps_set_ie(reg); 3194 wps_cb_set_sel_reg(reg); 3195} 3196 3197 3198int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3199 char *buf, size_t buflen) 3200{ 3201 struct wps_registrar_device *d; 3202 int len = 0, ret; 3203 char uuid[40]; 3204 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3205 3206 d = wps_device_get(reg, addr); 3207 if (d == NULL) 3208 return 0; 3209 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3210 return 0; 3211 3212 ret = os_snprintf(buf + len, buflen - len, 3213 "wpsUuid=%s\n" 3214 "wpsPrimaryDeviceType=%s\n" 3215 "wpsDeviceName=%s\n" 3216 "wpsManufacturer=%s\n" 3217 "wpsModelName=%s\n" 3218 "wpsModelNumber=%s\n" 3219 "wpsSerialNumber=%s\n", 3220 uuid, 3221 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3222 sizeof(devtype)), 3223 d->dev.device_name ? d->dev.device_name : "", 3224 d->dev.manufacturer ? d->dev.manufacturer : "", 3225 d->dev.model_name ? d->dev.model_name : "", 3226 d->dev.model_number ? d->dev.model_number : "", 3227 d->dev.serial_number ? d->dev.serial_number : ""); 3228 if (ret < 0 || (size_t) ret >= buflen - len) 3229 return len; 3230 len += ret; 3231 3232 return len; 3233} 3234 3235 3236int wps_registrar_config_ap(struct wps_registrar *reg, 3237 struct wps_credential *cred) 3238{ 3239#ifdef CONFIG_WPS2 3240 printf("encr_type=0x%x\n", cred->encr_type); 3241 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3242 WPS_ENCR_AES))) { 3243 if (cred->encr_type & WPS_ENCR_WEP) { 3244 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3245 "due to WEP configuration"); 3246 return -1; 3247 } 3248 3249 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3250 "invalid encr_type 0x%x", cred->encr_type); 3251 return -1; 3252 } 3253 3254 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3255 WPS_ENCR_TKIP) { 3256 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3257 "TKIP+AES"); 3258 cred->encr_type |= WPS_ENCR_AES; 3259 } 3260 3261 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3262 WPS_AUTH_WPAPSK) { 3263 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3264 "WPAPSK+WPA2PSK"); 3265 cred->auth_type |= WPS_AUTH_WPA2PSK; 3266 } 3267#endif /* CONFIG_WPS2 */ 3268 3269 if (reg->wps->cred_cb) 3270 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3271 3272 return -1; 3273} 3274