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 #endif /* CONFIG_WPS_TESTING */
  22
  23
  24 /**
  25  * wps_init - Initialize WPS Registration protocol data
  26  * @cfg: WPS configuration
  27  * Returns: Pointer to allocated data or %NULL on failure
  28  *
  29  * This function is used to initialize WPS data for a registration protocol
  30  * instance (i.e., each run of registration protocol as a Registrar of
  31  * Enrollee. The caller is responsible for freeing this data after the
  32  * registration run has been completed by calling wps_deinit().
  33  */
  34 struct wps_data * wps_init(const struct wps_config *cfg)
  35 {
  36         struct wps_data *data = os_zalloc(sizeof(*data));
  37         if (data == NULL)
  38                 return NULL;
  39         data->wps = cfg->wps;
  40         data->registrar = cfg->registrar;
  41         if (cfg->registrar) {
  42                 os_memcpy(data->uuid_r, cfg->wps->uuid, WPS_UUID_LEN);
  43         } else {
  44                 os_memcpy(data->mac_addr_e, cfg->wps->dev.mac_addr, ETH_ALEN);
  45                 os_memcpy(data->uuid_e, cfg->wps->uuid, WPS_UUID_LEN);
  46         }
  47         if (cfg->pin) {
  48                 data->dev_pw_id = cfg->dev_pw_id;
  49                 data->dev_password = os_malloc(cfg->pin_len);
  50                 if (data->dev_password == NULL) {
  51                         os_free(data);
  52                         return NULL;
  53                 }
  54                 os_memcpy(data->dev_password, cfg->pin, cfg->pin_len);
  55                 data->dev_password_len = cfg->pin_len;
  56                 wpa_hexdump_key(MSG_DEBUG, "WPS: AP PIN dev_password",
  57                                 data->dev_password, data->dev_password_len);
  58         }
  59
  60 #ifdef CONFIG_WPS_NFC
  61         if (cfg->wps->ap && !cfg->registrar && cfg->wps->ap_nfc_dev_pw_id) {
  62                 /* Keep AP PIN as alternative Device Password */
  63                 data->alt_dev_pw_id = data->dev_pw_id;
  64                 data->alt_dev_password = data->dev_password;
  65                 data->alt_dev_password_len = data->dev_password_len;
  66
  67                 data->dev_pw_id = cfg->wps->ap_nfc_dev_pw_id;
  68                 data->dev_password =
  69                         os_malloc(wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  70                 if (data->dev_password == NULL) {
  71                         os_free(data);
  72                         return NULL;
  73                 }
  74                 os_memcpy(data->dev_password,
  75                           wpabuf_head(cfg->wps->ap_nfc_dev_pw),
  76                           wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  77                 data->dev_password_len = wpabuf_len(cfg->wps->ap_nfc_dev_pw);
  78                 wpa_hexdump_key(MSG_DEBUG, "WPS: NFC dev_password",
  79                             data->dev_password, data->dev_password_len);
  80         }
  81 #endif /* CONFIG_WPS_NFC */
  82
  83         data->pbc = cfg->pbc;
  84         if (cfg->pbc) {
  85                 /* Use special PIN '00000000' for PBC */
  86                 data->dev_pw_id = DEV_PW_PUSHBUTTON;
  87                 os_free(data->dev_password);
  88                 data->dev_password = (u8 *) os_strdup("00000000");
  89                 if (data->dev_password == NULL) {
  90                         os_free(data);
  91                         return NULL;
  92                 }
  93                 data->dev_password_len = 8;
  94         }
  95
  96         data->state = data->registrar ? RECV_M1 : SEND_M1;
  97
  98         if (cfg->assoc_wps_ie) {
  99                 struct wps_parse_attr attr;
 100                 wpa_hexdump_buf(MSG_DEBUG, "WPS: WPS IE from (Re)AssocReq",
 101                                 cfg->assoc_wps_ie);
 102                 if (wps_parse_msg(cfg->assoc_wps_ie, &attr) < 0) {
 103                         wpa_printf(MSG_DEBUG, "WPS: Failed to parse WPS IE "
 104                                    "from (Re)AssocReq");
 105                 } else if (attr.request_type == NULL) {
 106                         wpa_printf(MSG_DEBUG, "WPS: No Request Type attribute "
 107                                    "in (Re)AssocReq WPS IE");
 108                 } else {
 109                         wpa_printf(MSG_DEBUG, "WPS: Request Type (from WPS IE "
 110                                    "in (Re)AssocReq WPS IE): %d",
 111                                    *attr.request_type);
 112                         data->request_type = *attr.request_type;
 113                 }
 114         }
 115
 116         if (cfg->new_ap_settings) {
 117                 data->new_ap_settings =
 118                         os_malloc(sizeof(*data->new_ap_settings));
 119                 if (data->new_ap_settings == NULL) {
 120                         os_free(data->dev_password);
 121                         os_free(data);
 122                         return NULL;
 123                 }
 124                 os_memcpy(data->new_ap_settings, cfg->new_ap_settings,
 125                           sizeof(*data->new_ap_settings));
 126         }
 127
 128         if (cfg->peer_addr)
 129                 os_memcpy(data->peer_dev.mac_addr, cfg->peer_addr, ETH_ALEN);
 130         if (cfg->p2p_dev_addr)
 131                 os_memcpy(data->p2p_dev_addr, cfg->p2p_dev_addr, ETH_ALEN);
 132
 133         data->use_psk_key = cfg->use_psk_key;
 134         data->pbc_in_m1 = cfg->pbc_in_m1;
 135
 136         if (cfg->peer_pubkey_hash) {
 137                 os_memcpy(data->peer_pubkey_hash, cfg->peer_pubkey_hash,
 138                           WPS_OOB_PUBKEY_HASH_LEN);
 139                 data->peer_pubkey_hash_set = 1;
 140         }
 141
 142         return data;
 143 }
 144
 145
 146 /**
 147  * wps_deinit - Deinitialize WPS Registration protocol data
 148  * @data: WPS Registration protocol data from wps_init()
 149  */
 150 void wps_deinit(struct wps_data *data)
 151 {
 152 #ifdef CONFIG_WPS_NFC
 153         if (data->registrar && data->nfc_pw_token)
 154                 wps_registrar_remove_nfc_pw_token(data->wps->registrar,
 155                                                   data->nfc_pw_token);
 156 #endif /* CONFIG_WPS_NFC */
 157
 158         if (data->wps_pin_revealed) {
 159                 wpa_printf(MSG_DEBUG, "WPS: Full PIN information revealed and "
 160                            "negotiation failed");
 161                 if (data->registrar)
 162                         wps_registrar_invalidate_pin(data->wps->registrar,
 163                                                      data->uuid_e);
 164         } else if (data->registrar)
 165                 wps_registrar_unlock_pin(data->wps->registrar, data->uuid_e);
 166
 167         wpabuf_free(data->dh_privkey);
 168         wpabuf_free(data->dh_pubkey_e);
 169         wpabuf_free(data->dh_pubkey_r);
 170         wpabuf_free(data->last_msg);
 171         os_free(data->dev_password);
 172         os_free(data->alt_dev_password);
 173         os_free(data->new_psk);
 174         wps_device_data_free(&data->peer_dev);
 175         os_free(data->new_ap_settings);
 176         dh5_free(data->dh_ctx);
 177         os_free(data->nfc_pw_token);
 178         os_free(data);
 179 }
 180
 181
 182 /**
 183  * wps_process_msg - Process a WPS message
 184  * @wps: WPS Registration protocol data from wps_init()
 185  * @op_code: Message OP Code
 186  * @msg: Message data
 187  * Returns: Processing result
 188  *
 189  * This function is used to process WPS messages with OP Codes WSC_ACK,
 190  * WSC_NACK, WSC_MSG, and WSC_Done. The caller (e.g., EAP server/peer) is
 191  * responsible for reassembling the messages before calling this function.
 192  * Response to this message is built by calling wps_get_msg().
 193  */
 194 enum wps_process_res wps_process_msg(struct wps_data *wps,
 195                                      enum wsc_op_code op_code,
 196                                      const struct wpabuf *msg)
 197 {
 198         if (wps->registrar)
 199                 return wps_registrar_process_msg(wps, op_code, msg);
 200         else
 201                 return wps_enrollee_process_msg(wps, op_code, msg);
 202 }
 203
 204
 205 /**
 206  * wps_get_msg - Build a WPS message
 207  * @wps: WPS Registration protocol data from wps_init()
 208  * @op_code: Buffer for returning message OP Code
 209  * Returns: The generated WPS message or %NULL on failure
 210  *
 211  * This function is used to build a response to a message processed by calling
 212  * wps_process_msg(). The caller is responsible for freeing the buffer.
 213  */
 214 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code)
 215 {
 216         if (wps->registrar)
 217                 return wps_registrar_get_msg(wps, op_code);
 218         else
 219                 return wps_enrollee_get_msg(wps, op_code);
 220 }
 221
 222
 223 /**
 224  * wps_is_selected_pbc_registrar - Check whether WPS IE indicates active PBC
 225  * @msg: WPS IE contents from Beacon or Probe Response frame
 226  * Returns: 1 if PBC Registrar is active, 0 if not
 227  */
 228 int wps_is_selected_pbc_registrar(const struct wpabuf *msg)
 229 {
 230         struct wps_parse_attr attr;
 231
 232         /*
 233          * In theory, this could also verify that attr.sel_reg_config_methods
 234          * includes WPS_CONFIG_PUSHBUTTON, but some deployed AP implementations
 235          * do not set Selected Registrar Config Methods attribute properly, so
 236          * it is safer to just use Device Password ID here.
 237          */
 238
 239         if (wps_parse_msg(msg, &attr) < 0 ||
 240             !attr.selected_registrar || *attr.selected_registrar == 0 ||
 241             !attr.dev_password_id ||
 242             WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
 243                 return 0;
 244
 245 #ifdef CONFIG_WPS_STRICT
 246         if (!attr.sel_reg_config_methods ||
 247             !(WPA_GET_BE16(attr.sel_reg_config_methods) &
 248               WPS_CONFIG_PUSHBUTTON))
 249                 return 0;
 250 #endif /* CONFIG_WPS_STRICT */
 251
 252         return 1;
 253 }
 254
 255
 256 static int is_selected_pin_registrar(struct wps_parse_attr *attr)
 257 {
 258         /*
 259          * In theory, this could also verify that attr.sel_reg_config_methods
 260          * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
 261          * but some deployed AP implementations do not set Selected Registrar
 262          * Config Methods attribute properly, so it is safer to just use
 263          * Device Password ID here.
 264          */
 265
 266         if (!attr->selected_registrar || *attr->selected_registrar == 0)
 267                 return 0;
 268
 269         if (attr->dev_password_id != NULL &&
 270             WPA_GET_BE16(attr->dev_password_id) == DEV_PW_PUSHBUTTON)
 271                 return 0;
 272
 273 #ifdef CONFIG_WPS_STRICT
 274         if (!attr->sel_reg_config_methods ||
 275             !(WPA_GET_BE16(attr->sel_reg_config_methods) &
 276               (WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD)))
 277                 return 0;
 278 #endif /* CONFIG_WPS_STRICT */
 279
 280         return 1;
 281 }
 282
 283
 284 /**
 285  * wps_is_selected_pin_registrar - Check whether WPS IE indicates active PIN
 286  * @msg: WPS IE contents from Beacon or Probe Response frame
 287  * Returns: 1 if PIN Registrar is active, 0 if not
 288  */
 289 int wps_is_selected_pin_registrar(const struct wpabuf *msg)
 290 {
 291         struct wps_parse_attr attr;
 292
 293         if (wps_parse_msg(msg, &attr) < 0)
 294                 return 0;
 295
 296         return is_selected_pin_registrar(&attr);
 297 }
 298
 299
 300 /**
 301  * wps_is_addr_authorized - Check whether WPS IE authorizes MAC address
 302  * @msg: WPS IE contents from Beacon or Probe Response frame
 303  * @addr: MAC address to search for
 304  * @ver1_compat: Whether to use version 1 compatibility mode
 305  * Returns: 2 if the specified address is explicit authorized, 1 if address is
 306  * authorized (broadcast), 0 if not
 307  */
 308 int wps_is_addr_authorized(const struct wpabuf *msg, const u8 *addr,
 309                            int ver1_compat)
 310 {
 311         struct wps_parse_attr attr;
 312         unsigned int i;
 313         const u8 *pos;
 314         const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 315
 316         if (wps_parse_msg(msg, &attr) < 0)
 317                 return 0;
 318
 319         if (!attr.version2 && ver1_compat) {
 320                 /*
 321                  * Version 1.0 AP - AuthorizedMACs not used, so revert back to
 322                  * old mechanism of using SelectedRegistrar.
 323                  */
 324                 return is_selected_pin_registrar(&attr);
 325         }
 326
 327         if (!attr.authorized_macs)
 328                 return 0;
 329
 330         pos = attr.authorized_macs;
 331         for (i = 0; i < attr.authorized_macs_len / ETH_ALEN; i++) {
 332                 if (os_memcmp(pos, addr, ETH_ALEN) == 0)
 333                         return 2;
 334                 if (os_memcmp(pos, bcast, ETH_ALEN) == 0)
 335                         return 1;
 336                 pos += ETH_ALEN;
 337         }
 338
 339         return 0;
 340 }
 341
 342
 343 /**
 344  * wps_ap_priority_compar - Prioritize WPS IE from two APs
 345  * @wps_a: WPS IE contents from Beacon or Probe Response frame
 346  * @wps_b: WPS IE contents from Beacon or Probe Response frame
 347  * Returns: 1 if wps_b is considered more likely selection for WPS
 348  * provisioning, -1 if wps_a is considered more like, or 0 if no preference
 349  */
 350 int wps_ap_priority_compar(const struct wpabuf *wps_a,
 351                            const struct wpabuf *wps_b)
 352 {
 353         struct wps_parse_attr attr_a, attr_b;
 354         int sel_a, sel_b;
 355
 356         if (wps_a == NULL || wps_parse_msg(wps_a, &attr_a) < 0)
 357                 return 1;
 358         if (wps_b == NULL || wps_parse_msg(wps_b, &attr_b) < 0)
 359                 return -1;
 360
 361         sel_a = attr_a.selected_registrar && *attr_a.selected_registrar != 0;
 362         sel_b = attr_b.selected_registrar && *attr_b.selected_registrar != 0;
 363
 364         if (sel_a && !sel_b)
 365                 return -1;
 366         if (!sel_a && sel_b)
 367                 return 1;
 368
 369         return 0;
 370 }
 371
 372
 373 /**
 374  * wps_get_uuid_e - Get UUID-E from WPS IE
 375  * @msg: WPS IE contents from Beacon or Probe Response frame
 376  * Returns: Pointer to UUID-E or %NULL if not included
 377  *
 378  * The returned pointer is to the msg contents and it remains valid only as
 379  * long as the msg buffer is valid.
 380  */
 381 const u8 * wps_get_uuid_e(const struct wpabuf *msg)
 382 {
 383         struct wps_parse_attr attr;
 384
 385         if (wps_parse_msg(msg, &attr) < 0)
 386                 return NULL;
 387         return attr.uuid_e;
 388 }
 389
 390
 391 /**
 392  * wps_is_20 - Check whether WPS attributes claim support for WPS 2.0
 393  */
 394 int wps_is_20(const struct wpabuf *msg)
 395 {
 396         struct wps_parse_attr attr;
 397
 398         if (msg == NULL || wps_parse_msg(msg, &attr) < 0)
 399                 return 0;
 400         return attr.version2 != NULL;
 401 }
 402
 403
 404 /**
 405  * wps_build_assoc_req_ie - Build WPS IE for (Re)Association Request
 406  * @req_type: Value for Request Type attribute
 407  * Returns: WPS IE or %NULL on failure
 408  *
 409  * The caller is responsible for freeing the buffer.
 410  */
 411 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type)
 412 {
 413         struct wpabuf *ie;
 414         u8 *len;
 415
 416         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 417                    "Request");
 418         ie = wpabuf_alloc(100);
 419         if (ie == NULL)
 420                 return NULL;
 421
 422         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 423         len = wpabuf_put(ie, 1);
 424         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 425
 426         if (wps_build_version(ie) ||
 427             wps_build_req_type(ie, req_type) ||
 428             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 429                 wpabuf_free(ie);
 430                 return NULL;
 431         }
 432
 433         *len = wpabuf_len(ie) - 2;
 434
 435         return ie;
 436 }
 437
 438
 439 /**
 440  * wps_build_assoc_resp_ie - Build WPS IE for (Re)Association Response
 441  * Returns: WPS IE or %NULL on failure
 442  *
 443  * The caller is responsible for freeing the buffer.
 444  */
 445 struct wpabuf * wps_build_assoc_resp_ie(void)
 446 {
 447         struct wpabuf *ie;
 448         u8 *len;
 449
 450         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 451                    "Response");
 452         ie = wpabuf_alloc(100);
 453         if (ie == NULL)
 454                 return NULL;
 455
 456         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 457         len = wpabuf_put(ie, 1);
 458         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 459
 460         if (wps_build_version(ie) ||
 461             wps_build_resp_type(ie, WPS_RESP_AP) ||
 462             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 463                 wpabuf_free(ie);
 464                 return NULL;
 465         }
 466
 467         *len = wpabuf_len(ie) - 2;
 468
 469         return ie;
 470 }
 471
 472
 473 /**
 474  * wps_build_probe_req_ie - Build WPS IE for Probe Request
 475  * @pw_id: Password ID (DEV_PW_PUSHBUTTON for active PBC and DEV_PW_DEFAULT for
 476  * most other use cases)
 477  * @dev: Device attributes
 478  * @uuid: Own UUID
 479  * @req_type: Value for Request Type attribute
 480  * @num_req_dev_types: Number of requested device types
 481  * @req_dev_types: Requested device types (8 * num_req_dev_types octets) or
 482  *      %NULL if none
 483  * Returns: WPS IE or %NULL on failure
 484  *
 485  * The caller is responsible for freeing the buffer.
 486  */
 487 struct wpabuf * wps_build_probe_req_ie(u16 pw_id, struct wps_device_data *dev,
 488                                        const u8 *uuid,
 489                                        enum wps_request_type req_type,
 490                                        unsigned int num_req_dev_types,
 491                                        const u8 *req_dev_types)
 492 {
 493         struct wpabuf *ie;
 494
 495         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
 496
 497         ie = wpabuf_alloc(500);
 498         if (ie == NULL)
 499                 return NULL;
 500
 501         if (wps_build_version(ie) ||
 502             wps_build_req_type(ie, req_type) ||
 503             wps_build_config_methods(ie, dev->config_methods) ||
 504             wps_build_uuid_e(ie, uuid) ||
 505             wps_build_primary_dev_type(dev, ie) ||
 506             wps_build_rf_bands(dev, ie, 0) ||
 507             wps_build_assoc_state(NULL, ie) ||
 508             wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
 509             wps_build_dev_password_id(ie, pw_id) ||
 510 #ifdef CONFIG_WPS2
 511             wps_build_manufacturer(dev, ie) ||
 512             wps_build_model_name(dev, ie) ||
 513             wps_build_model_number(dev, ie) ||
 514             wps_build_dev_name(dev, ie) ||
 515             wps_build_wfa_ext(ie, req_type == WPS_REQ_ENROLLEE, NULL, 0) ||
 516 #endif /* CONFIG_WPS2 */
 517             wps_build_req_dev_type(dev, ie, num_req_dev_types, req_dev_types)
 518             ||
 519             wps_build_secondary_dev_type(dev, ie)
 520                 ) {
 521                 wpabuf_free(ie);
 522                 return NULL;
 523         }
 524
 525 #ifndef CONFIG_WPS2
 526         if (dev->p2p && wps_build_dev_name(dev, ie)) {
 527                 wpabuf_free(ie);
 528                 return NULL;
 529         }
 530 #endif /* CONFIG_WPS2 */
 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 (ret < 0 || ret >= end - pos)
 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 (ret < 0 || ret >= end - pos)
 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 (ret < 0 || ret >= end - pos)
 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 (ret < 0 || ret >= end - pos)
 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 (ret < 0 || ret >= end - pos)
 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 (ret < 0 || ret >= end - pos)
 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] < 32)
 626                                 str[i] = '_';
 627                         else
 628                                 str[i] = attr.dev_name[i];
 629                 }
 630                 str[i] = '\0';
 631                 ret = os_snprintf(pos, end - pos, "wps_device_name=%s\n", str);
 632                 os_free(str);
 633                 if (ret < 0 || ret >= end - pos)
 634                         return pos - buf;
 635                 pos += ret;
 636         }
 637
 638         if (attr.config_methods) {
 639                 ret = os_snprintf(pos, end - pos,
 640                                   "wps_config_methods=0x%04x\n",
 641                                   WPA_GET_BE16(attr.config_methods));
 642                 if (ret < 0 || ret >= end - pos)
 643                         return pos - buf;
 644                 pos += ret;
 645         }
 646
 647         return pos - buf;
 648 }
 649
 650
 651 const char * wps_ei_str(enum wps_error_indication ei)
 652 {
 653         switch (ei) {
 654         case WPS_EI_NO_ERROR:
 655                 return "No Error";
 656         case WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED:
 657                 return "TKIP Only Prohibited";
 658         case WPS_EI_SECURITY_WEP_PROHIBITED:
 659                 return "WEP Prohibited";
 660         case WPS_EI_AUTH_FAILURE:
 661                 return "Authentication Failure";
 662         default:
 663                 return "Unknown";
 664         }
 665 }