src/wps/wps_registrar.c

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