libeap/src/wps/wps.c

   1 /*
   2  * Wi-Fi Protected Setup
   3  * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "crypto/dh_group5.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "wps_i.h"
  15 #include "wps_dev_attr.h"
  16
  17
  18 #ifdef CONFIG_WPS_TESTING
  19 int wps_version_number = 0x20;
  20 int wps_testing_dummy_cred = 0;
  21 int wps_corrupt_pkhash = 0;
  22 int wps_force_auth_types_in_use = 0;
  23 u16 wps_force_auth_types = 0;
  24 int wps_force_encr_types_in_use = 0;
  25 u16 wps_force_encr_types = 0;
  26 #endif /* CONFIG_WPS_TESTING */
  27
  28
  29 /**
  30  * wps_init - Initialize WPS Registration protocol data
  31  * @cfg: WPS configuration
  32  * Returns: Pointer to allocated data or %NULL on failure
  33  *
  34  * This function is used to initialize WPS data for a registration protocol
  35  * instance (i.e., each run of registration protocol as a Registrar of
  36  * Enrollee. The caller is responsible for freeing this data after the
  37  * registration run has been completed by calling wps_deinit().
  38  */
  39 struct wps_data * wps_init(const struct wps_config *cfg)
  40 {
  41         struct wps_data *data = os_zalloc(sizeof(*data));
  42         if (data == NULL)
  43                 return NULL;
  44         data->wps = cfg->wps;
  45         data->registrar = cfg->registrar;
  46         if (cfg->registrar) {
  47                 os_memcpy(data->uuid_r, cfg->wps->uuid, WPS_UUID_LEN);
  48         } else {
  49                 os_memcpy(data->mac_addr_e, cfg->wps->dev.mac_addr, ETH_ALEN);
  50                 os_memcpy(data->uuid_e, cfg->wps->uuid, WPS_UUID_LEN);
  51         }
  52         if (cfg->pin) {
  53                 data->dev_pw_id = cfg->dev_pw_id;
  54                 data->dev_password = os_malloc(cfg->pin_len);
  55                 if (data->dev_password == NULL) {
  56                         os_free(data);
  57                         return NULL;
  58                 }
  59                 os_memcpy(data->dev_password, cfg->pin, cfg->pin_len);
  60                 data->dev_password_len = cfg->pin_len;
  61                 wpa_hexdump_key(MSG_DEBUG, "WPS: AP PIN dev_password",
  62                                 data->dev_password, data->dev_password_len);
  63         }
  64
  65 #ifdef CONFIG_WPS_NFC
  66         if (cfg->pin == NULL &&
  67             cfg->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
  68                 data->dev_pw_id = cfg->dev_pw_id;
  69
  70         if (cfg->wps->ap && !cfg->registrar && cfg->wps->ap_nfc_dev_pw_id) {
  71                 /* Keep AP PIN as alternative Device Password */
  72                 data->alt_dev_pw_id = data->dev_pw_id;
  73                 data->alt_dev_password = data->dev_password;
  74                 data->alt_dev_password_len = data->dev_password_len;
  75
  76                 data->dev_pw_id = cfg->wps->ap_nfc_dev_pw_id;
  77                 data->dev_password =
  78                         os_malloc(wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  79                 if (data->dev_password == NULL) {
  80                         os_free(data);
  81                         return NULL;
  82                 }
  83                 os_memcpy(data->dev_password,
  84                           wpabuf_head(cfg->wps->ap_nfc_dev_pw),
  85                           wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  86                 data->dev_password_len = wpabuf_len(cfg->wps->ap_nfc_dev_pw);
  87                 wpa_hexdump_key(MSG_DEBUG, "WPS: NFC dev_password",
  88                             data->dev_password, data->dev_password_len);
  89         }
  90 #endif /* CONFIG_WPS_NFC */
  91
  92         data->pbc = cfg->pbc;
  93         if (cfg->pbc) {
  94                 /* Use special PIN '00000000' for PBC */
  95                 data->dev_pw_id = DEV_PW_PUSHBUTTON;
  96                 bin_clear_free(data->dev_password, data->dev_password_len);
  97                 data->dev_password = (u8 *) os_strdup("00000000");
  98                 if (data->dev_password == NULL) {
  99                         os_free(data);
 100                         return NULL;
 101                 }
 102                 data->dev_password_len = 8;
 103         }
 104
 105         data->state = data->registrar ? RECV_M1 : SEND_M1;
 106
 107         if (cfg->assoc_wps_ie) {
 108                 struct wps_parse_attr attr;
 109                 wpa_hexdump_buf(MSG_DEBUG, "WPS: WPS IE from (Re)AssocReq",
 110                                 cfg->assoc_wps_ie);
 111                 if (wps_parse_msg(cfg->assoc_wps_ie, &attr) < 0) {
 112                         wpa_printf(MSG_DEBUG, "WPS: Failed to parse WPS IE "
 113                                    "from (Re)AssocReq");
 114                 } else if (attr.request_type == NULL) {
 115                         wpa_printf(MSG_DEBUG, "WPS: No Request Type attribute "
 116                                    "in (Re)AssocReq WPS IE");
 117                 } else {
 118                         wpa_printf(MSG_DEBUG, "WPS: Request Type (from WPS IE "
 119                                    "in (Re)AssocReq WPS IE): %d",
 120                                    *attr.request_type);
 121                         data->request_type = *attr.request_type;
 122                 }
 123         }
 124
 125         if (cfg->new_ap_settings) {
 126                 data->new_ap_settings =
 127                         os_malloc(sizeof(*data->new_ap_settings));
 128                 if (data->new_ap_settings == NULL) {
 129                         bin_clear_free(data->dev_password,
 130                                        data->dev_password_len);
 131                         os_free(data);
 132                         return NULL;
 133                 }
 134                 os_memcpy(data->new_ap_settings, cfg->new_ap_settings,
 135                           sizeof(*data->new_ap_settings));
 136         }
 137
 138         if (cfg->peer_addr)
 139                 os_memcpy(data->peer_dev.mac_addr, cfg->peer_addr, ETH_ALEN);
 140         if (cfg->p2p_dev_addr)
 141                 os_memcpy(data->p2p_dev_addr, cfg->p2p_dev_addr, ETH_ALEN);
 142
 143         data->use_psk_key = cfg->use_psk_key;
 144         data->pbc_in_m1 = cfg->pbc_in_m1;
 145
 146         if (cfg->peer_pubkey_hash) {
 147                 os_memcpy(data->peer_pubkey_hash, cfg->peer_pubkey_hash,
 148                           WPS_OOB_PUBKEY_HASH_LEN);
 149                 data->peer_pubkey_hash_set = 1;
 150         }
 151
 152         return data;
 153 }
 154
 155
 156 /**
 157  * wps_deinit - Deinitialize WPS Registration protocol data
 158  * @data: WPS Registration protocol data from wps_init()
 159  */
 160 void wps_deinit(struct wps_data *data)
 161 {
 162 #ifdef CONFIG_WPS_NFC
 163         if (data->registrar && data->nfc_pw_token)
 164                 wps_registrar_remove_nfc_pw_token(data->wps->registrar,
 165                                                   data->nfc_pw_token);
 166 #endif /* CONFIG_WPS_NFC */
 167
 168         if (data->wps_pin_revealed) {
 169                 wpa_printf(MSG_DEBUG, "WPS: Full PIN information revealed and "
 170                            "negotiation failed");
 171                 if (data->registrar)
 172                         wps_registrar_invalidate_pin(data->wps->registrar,
 173                                                      data->uuid_e);
 174         } else if (data->registrar)
 175                 wps_registrar_unlock_pin(data->wps->registrar, data->uuid_e);
 176
 177         wpabuf_clear_free(data->dh_privkey);
 178         wpabuf_free(data->dh_pubkey_e);
 179         wpabuf_free(data->dh_pubkey_r);
 180         wpabuf_free(data->last_msg);
 181         bin_clear_free(data->dev_password, data->dev_password_len);
 182         bin_clear_free(data->alt_dev_password, data->alt_dev_password_len);
 183         bin_clear_free(data->new_psk, data->new_psk_len);
 184         wps_device_data_free(&data->peer_dev);
 185         bin_clear_free(data->new_ap_settings, sizeof(*data->new_ap_settings));
 186         dh5_free(data->dh_ctx);
 187         os_free(data);
 188 }
 189
 190
 191 /**
 192  * wps_process_msg - Process a WPS message
 193  * @wps: WPS Registration protocol data from wps_init()
 194  * @op_code: Message OP Code
 195  * @msg: Message data
 196  * Returns: Processing result
 197  *
 198  * This function is used to process WPS messages with OP Codes WSC_ACK,
 199  * WSC_NACK, WSC_MSG, and WSC_Done. The caller (e.g., EAP server/peer) is
 200  * responsible for reassembling the messages before calling this function.
 201  * Response to this message is built by calling wps_get_msg().
 202  */
 203 enum wps_process_res wps_process_msg(struct wps_data *wps,
 204                                      enum wsc_op_code op_code,
 205                                      const struct wpabuf *msg)
 206 {
 207         if (wps->registrar)
 208                 return wps_registrar_process_msg(wps, op_code, msg);
 209         else
 210                 return wps_enrollee_process_msg(wps, op_code, msg);
 211 }
 212
 213
 214 /**
 215  * wps_get_msg - Build a WPS message
 216  * @wps: WPS Registration protocol data from wps_init()
 217  * @op_code: Buffer for returning message OP Code
 218  * Returns: The generated WPS message or %NULL on failure
 219  *
 220  * This function is used to build a response to a message processed by calling
 221  * wps_process_msg(). The caller is responsible for freeing the buffer.
 222  */
 223 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code)
 224 {
 225         if (wps->registrar)
 226                 return wps_registrar_get_msg(wps, op_code);
 227         else
 228                 return wps_enrollee_get_msg(wps, op_code);
 229 }
 230
 231
 232 /**
 233  * wps_is_selected_pbc_registrar - Check whether WPS IE indicates active PBC
 234  * @msg: WPS IE contents from Beacon or Probe Response frame
 235  * Returns: 1 if PBC Registrar is active, 0 if not
 236  */
 237 int wps_is_selected_pbc_registrar(const struct wpabuf *msg)
 238 {
 239         struct wps_parse_attr attr;
 240
 241         /*
 242          * In theory, this could also verify that attr.sel_reg_config_methods
 243          * includes WPS_CONFIG_PUSHBUTTON, but some deployed AP implementations
 244          * do not set Selected Registrar Config Methods attribute properly, so
 245          * it is safer to just use Device Password ID here.
 246          */
 247
 248         if (wps_parse_msg(msg, &attr) < 0 ||
 249             !attr.selected_registrar || *attr.selected_registrar == 0 ||
 250             !attr.dev_password_id ||
 251             WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
 252                 return 0;
 253
 254 #ifdef CONFIG_WPS_STRICT
 255         if (!attr.sel_reg_config_methods ||
 256             !(WPA_GET_BE16(attr.sel_reg_config_methods) &
 257               WPS_CONFIG_PUSHBUTTON))
 258                 return 0;
 259 #endif /* CONFIG_WPS_STRICT */
 260
 261         return 1;
 262 }
 263
 264
 265 static int is_selected_pin_registrar(struct wps_parse_attr *attr)
 266 {
 267         /*
 268          * In theory, this could also verify that attr.sel_reg_config_methods
 269          * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
 270          * but some deployed AP implementations do not set Selected Registrar
 271          * Config Methods attribute properly, so it is safer to just use
 272          * Device Password ID here.
 273          */
 274
 275         if (!attr->selected_registrar || *attr->selected_registrar == 0)
 276                 return 0;
 277
 278         if (attr->dev_password_id != NULL &&
 279             WPA_GET_BE16(attr->dev_password_id) == DEV_PW_PUSHBUTTON)
 280                 return 0;
 281
 282 #ifdef CONFIG_WPS_STRICT
 283         if (!attr->sel_reg_config_methods ||
 284             !(WPA_GET_BE16(attr->sel_reg_config_methods) &
 285               (WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD)))
 286                 return 0;
 287 #endif /* CONFIG_WPS_STRICT */
 288
 289         return 1;
 290 }
 291
 292
 293 /**
 294  * wps_is_selected_pin_registrar - Check whether WPS IE indicates active PIN
 295  * @msg: WPS IE contents from Beacon or Probe Response frame
 296  * Returns: 1 if PIN Registrar is active, 0 if not
 297  */
 298 int wps_is_selected_pin_registrar(const struct wpabuf *msg)
 299 {
 300         struct wps_parse_attr attr;
 301
 302         if (wps_parse_msg(msg, &attr) < 0)
 303                 return 0;
 304
 305         return is_selected_pin_registrar(&attr);
 306 }
 307
 308
 309 /**
 310  * wps_is_addr_authorized - Check whether WPS IE authorizes MAC address
 311  * @msg: WPS IE contents from Beacon or Probe Response frame
 312  * @addr: MAC address to search for
 313  * @ver1_compat: Whether to use version 1 compatibility mode
 314  * Returns: 2 if the specified address is explicit authorized, 1 if address is
 315  * authorized (broadcast), 0 if not
 316  */
 317 int wps_is_addr_authorized(const struct wpabuf *msg, const u8 *addr,
 318                            int ver1_compat)
 319 {
 320         struct wps_parse_attr attr;
 321         unsigned int i;
 322         const u8 *pos;
 323         const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 324
 325         if (wps_parse_msg(msg, &attr) < 0)
 326                 return 0;
 327
 328         if (!attr.version2 && ver1_compat) {
 329                 /*
 330                  * Version 1.0 AP - AuthorizedMACs not used, so revert back to
 331                  * old mechanism of using SelectedRegistrar.
 332                  */
 333                 return is_selected_pin_registrar(&attr);
 334         }
 335
 336         if (!attr.authorized_macs)
 337                 return 0;
 338
 339         pos = attr.authorized_macs;
 340         for (i = 0; i < attr.authorized_macs_len / ETH_ALEN; i++) {
 341                 if (os_memcmp(pos, addr, ETH_ALEN) == 0)
 342                         return 2;
 343                 if (os_memcmp(pos, bcast, ETH_ALEN) == 0)
 344                         return 1;
 345                 pos += ETH_ALEN;
 346         }
 347
 348         return 0;
 349 }
 350
 351
 352 /**
 353  * wps_ap_priority_compar - Prioritize WPS IE from two APs
 354  * @wps_a: WPS IE contents from Beacon or Probe Response frame
 355  * @wps_b: WPS IE contents from Beacon or Probe Response frame
 356  * Returns: 1 if wps_b is considered more likely selection for WPS
 357  * provisioning, -1 if wps_a is considered more like, or 0 if no preference
 358  */
 359 int wps_ap_priority_compar(const struct wpabuf *wps_a,
 360                            const struct wpabuf *wps_b)
 361 {
 362         struct wps_parse_attr attr;
 363         int sel_a, sel_b;
 364
 365         if (wps_a == NULL || wps_parse_msg(wps_a, &attr) < 0)
 366                 return 1;
 367         sel_a = attr.selected_registrar && *attr.selected_registrar != 0;
 368
 369         if (wps_b == NULL || wps_parse_msg(wps_b, &attr) < 0)
 370                 return -1;
 371         sel_b = attr.selected_registrar && *attr.selected_registrar != 0;
 372
 373         if (sel_a && !sel_b)
 374                 return -1;
 375         if (!sel_a && sel_b)
 376                 return 1;
 377
 378         return 0;
 379 }
 380
 381
 382 /**
 383  * wps_get_uuid_e - Get UUID-E from WPS IE
 384  * @msg: WPS IE contents from Beacon or Probe Response frame
 385  * Returns: Pointer to UUID-E or %NULL if not included
 386  *
 387  * The returned pointer is to the msg contents and it remains valid only as
 388  * long as the msg buffer is valid.
 389  */
 390 const u8 * wps_get_uuid_e(const struct wpabuf *msg)
 391 {
 392         struct wps_parse_attr attr;
 393
 394         if (wps_parse_msg(msg, &attr) < 0)
 395                 return NULL;
 396         return attr.uuid_e;
 397 }
 398
 399
 400 /**
 401  * wps_is_20 - Check whether WPS attributes claim support for WPS 2.0
 402  */
 403 int wps_is_20(const struct wpabuf *msg)
 404 {
 405         struct wps_parse_attr attr;
 406
 407         if (msg == NULL || wps_parse_msg(msg, &attr) < 0)
 408                 return 0;
 409         return attr.version2 != NULL;
 410 }
 411
 412
 413 /**
 414  * wps_build_assoc_req_ie - Build WPS IE for (Re)Association Request
 415  * @req_type: Value for Request Type attribute
 416  * Returns: WPS IE or %NULL on failure
 417  *
 418  * The caller is responsible for freeing the buffer.
 419  */
 420 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type)
 421 {
 422         struct wpabuf *ie;
 423         u8 *len;
 424
 425         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 426                    "Request");
 427         ie = wpabuf_alloc(100);
 428         if (ie == NULL)
 429                 return NULL;
 430
 431         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 432         len = wpabuf_put(ie, 1);
 433         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 434
 435         if (wps_build_version(ie) ||
 436             wps_build_req_type(ie, req_type) ||
 437             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 438                 wpabuf_free(ie);
 439                 return NULL;
 440         }
 441
 442         *len = wpabuf_len(ie) - 2;
 443
 444         return ie;
 445 }
 446
 447
 448 /**
 449  * wps_build_assoc_resp_ie - Build WPS IE for (Re)Association Response
 450  * Returns: WPS IE or %NULL on failure
 451  *
 452  * The caller is responsible for freeing the buffer.
 453  */
 454 struct wpabuf * wps_build_assoc_resp_ie(void)
 455 {
 456         struct wpabuf *ie;
 457         u8 *len;
 458
 459         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 460                    "Response");
 461         ie = wpabuf_alloc(100);
 462         if (ie == NULL)
 463                 return NULL;
 464
 465         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 466         len = wpabuf_put(ie, 1);
 467         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 468
 469         if (wps_build_version(ie) ||
 470             wps_build_resp_type(ie, WPS_RESP_AP) ||
 471             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 472                 wpabuf_free(ie);
 473                 return NULL;
 474         }
 475
 476         *len = wpabuf_len(ie) - 2;
 477
 478         return ie;
 479 }
 480
 481
 482 /**
 483  * wps_build_probe_req_ie - Build WPS IE for Probe Request
 484  * @pw_id: Password ID (DEV_PW_PUSHBUTTON for active PBC and DEV_PW_DEFAULT for
 485  * most other use cases)
 486  * @dev: Device attributes
 487  * @uuid: Own UUID
 488  * @req_type: Value for Request Type attribute
 489  * @num_req_dev_types: Number of requested device types
 490  * @req_dev_types: Requested device types (8 * num_req_dev_types octets) or
 491  *      %NULL if none
 492  * Returns: WPS IE or %NULL on failure
 493  *
 494  * The caller is responsible for freeing the buffer.
 495  */
 496 struct wpabuf * wps_build_probe_req_ie(u16 pw_id, struct wps_device_data *dev,
 497                                        const u8 *uuid,
 498                                        enum wps_request_type req_type,
 499                                        unsigned int num_req_dev_types,
 500                                        const u8 *req_dev_types)
 501 {
 502         struct wpabuf *ie;
 503
 504         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
 505
 506         ie = wpabuf_alloc(500);
 507         if (ie == NULL)
 508                 return NULL;
 509
 510         if (wps_build_version(ie) ||
 511             wps_build_req_type(ie, req_type) ||
 512             wps_build_config_methods(ie, dev->config_methods) ||
 513             wps_build_uuid_e(ie, uuid) ||
 514             wps_build_primary_dev_type(dev, ie) ||
 515             wps_build_rf_bands(dev, ie, 0) ||
 516             wps_build_assoc_state(NULL, ie) ||
 517             wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
 518             wps_build_dev_password_id(ie, pw_id) ||
 519             wps_build_manufacturer(dev, ie) ||
 520             wps_build_model_name(dev, ie) ||
 521             wps_build_model_number(dev, ie) ||
 522             wps_build_dev_name(dev, ie) ||
 523             wps_build_wfa_ext(ie, req_type == WPS_REQ_ENROLLEE, NULL, 0) ||
 524             wps_build_req_dev_type(dev, ie, num_req_dev_types, req_dev_types)
 525             ||
 526             wps_build_secondary_dev_type(dev, ie)
 527                 ) {
 528                 wpabuf_free(ie);
 529                 return NULL;
 530         }
 531
 532         return wps_ie_encapsulate(ie);
 533 }
 534
 535
 536 void wps_free_pending_msgs(struct upnp_pending_message *msgs)
 537 {
 538         struct upnp_pending_message *p, *prev;
 539         p = msgs;
 540         while (p) {
 541                 prev = p;
 542                 p = p->next;
 543                 wpabuf_free(prev->msg);
 544                 os_free(prev);
 545         }
 546 }
 547
 548
 549 int wps_attr_text(struct wpabuf *data, char *buf, char *end)
 550 {
 551         struct wps_parse_attr attr;
 552         char *pos = buf;
 553         int ret;
 554
 555         if (wps_parse_msg(data, &attr) < 0)
 556                 return -1;
 557
 558         if (attr.wps_state) {
 559                 if (*attr.wps_state == WPS_STATE_NOT_CONFIGURED)
 560                         ret = os_snprintf(pos, end - pos,
 561                                           "wps_state=unconfigured\n");
 562                 else if (*attr.wps_state == WPS_STATE_CONFIGURED)
 563                         ret = os_snprintf(pos, end - pos,
 564                                           "wps_state=configured\n");
 565                 else
 566                         ret = 0;
 567                 if (os_snprintf_error(end - pos, ret))
 568                         return pos - buf;
 569                 pos += ret;
 570         }
 571
 572         if (attr.ap_setup_locked && *attr.ap_setup_locked) {
 573                 ret = os_snprintf(pos, end - pos,
 574                                   "wps_ap_setup_locked=1\n");
 575                 if (os_snprintf_error(end - pos, ret))
 576                         return pos - buf;
 577                 pos += ret;
 578         }
 579
 580         if (attr.selected_registrar && *attr.selected_registrar) {
 581                 ret = os_snprintf(pos, end - pos,
 582                                   "wps_selected_registrar=1\n");
 583                 if (os_snprintf_error(end - pos, ret))
 584                         return pos - buf;
 585                 pos += ret;
 586         }
 587
 588         if (attr.dev_password_id) {
 589                 ret = os_snprintf(pos, end - pos,
 590                                   "wps_device_password_id=%u\n",
 591                                   WPA_GET_BE16(attr.dev_password_id));
 592                 if (os_snprintf_error(end - pos, ret))
 593                         return pos - buf;
 594                 pos += ret;
 595         }
 596
 597         if (attr.sel_reg_config_methods) {
 598                 ret = os_snprintf(pos, end - pos,
 599                                   "wps_selected_registrar_config_methods="
 600                                   "0x%04x\n",
 601                                   WPA_GET_BE16(attr.sel_reg_config_methods));
 602                 if (os_snprintf_error(end - pos, ret))
 603                         return pos - buf;
 604                 pos += ret;
 605         }
 606
 607         if (attr.primary_dev_type) {
 608                 char devtype[WPS_DEV_TYPE_BUFSIZE];
 609                 ret = os_snprintf(pos, end - pos,
 610                                   "wps_primary_device_type=%s\n",
 611                                   wps_dev_type_bin2str(attr.primary_dev_type,
 612                                                        devtype,
 613                                                        sizeof(devtype)));
 614                 if (os_snprintf_error(end - pos, ret))
 615                         return pos - buf;
 616                 pos += ret;
 617         }
 618
 619         if (attr.dev_name) {
 620                 char *str = os_malloc(attr.dev_name_len + 1);
 621                 size_t i;
 622                 if (str == NULL)
 623                         return pos - buf;
 624                 for (i = 0; i < attr.dev_name_len; i++) {
 625                         if (attr.dev_name[i] == 0 ||
 626                             is_ctrl_char(attr.dev_name[i]))
 627                                 str[i] = '_';
 628                         else
 629                                 str[i] = attr.dev_name[i];
 630                 }
 631                 str[i] = '\0';
 632                 ret = os_snprintf(pos, end - pos, "wps_device_name=%s\n", str);
 633                 os_free(str);
 634                 if (os_snprintf_error(end - pos, ret))
 635                         return pos - buf;
 636                 pos += ret;
 637         }
 638
 639         if (attr.config_methods) {
 640                 ret = os_snprintf(pos, end - pos,
 641                                   "wps_config_methods=0x%04x\n",
 642                                   WPA_GET_BE16(attr.config_methods));
 643                 if (os_snprintf_error(end - pos, ret))
 644                         return pos - buf;
 645                 pos += ret;
 646         }
 647
 648         return pos - buf;
 649 }
 650
 651
 652 const char * wps_ei_str(enum wps_error_indication ei)
 653 {
 654         switch (ei) {
 655         case WPS_EI_NO_ERROR:
 656                 return "No Error";
 657         case WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED:
 658                 return "TKIP Only Prohibited";
 659         case WPS_EI_SECURITY_WEP_PROHIBITED:
 660                 return "WEP Prohibited";
 661         case WPS_EI_AUTH_FAILURE:
 662                 return "Authentication Failure";
 663         default:
 664                 return "Unknown";
 665         }
 666 }