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