wpa_supplicant/config_winreg.c

   1 /*
   2  * WPA Supplicant / Configuration backend: Windows registry
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements a configuration backend for Windows registry. All the
  15  * configuration information is stored in the registry and the format for
  16  * network configuration fields is same as described in the sample
  17  * configuration file, wpa_supplicant.conf.
  18  *
  19  * Configuration data is in
  20  * \a HKEY_LOCAL_MACHINE\\SOFTWARE\\%wpa_supplicant\\configs
  21  * key. Each configuration profile has its own key under this. In terms of text
  22  * files, each profile would map to a separate text file with possibly multiple
  23  * networks. Under each profile, there is a networks key that lists all
  24  * networks as a subkey. Each network has set of values in the same way as
  25  * network block in the configuration file. In addition, blobs subkey has
  26  * possible blobs as values.
  27  *
  28  * Example network configuration block:
  29  * \verbatim
  30 HKEY_LOCAL_MACHINE\SOFTWARE\wpa_supplicant\configs\test\networks\0000
  31    ssid="example"
  32    key_mgmt=WPA-PSK
  33 \endverbatim
  34  */
  35
  36 #include "includes.h"
  37
  38 #include "common.h"
  39 #include "uuid.h"
  40 #include "config.h"
  41
  42 #ifndef WPA_KEY_ROOT
  43 #define WPA_KEY_ROOT HKEY_LOCAL_MACHINE
  44 #endif
  45 #ifndef WPA_KEY_PREFIX
  46 #define WPA_KEY_PREFIX TEXT("SOFTWARE\\wpa_supplicant")
  47 #endif
  48
  49 #ifdef UNICODE
  50 #define TSTR "%S"
  51 #else /* UNICODE */
  52 #define TSTR "%s"
  53 #endif /* UNICODE */
  54
  55
  56 static int wpa_config_read_blobs(struct wpa_config *config, HKEY hk)
  57 {
  58         struct wpa_config_blob *blob;
  59         int errors = 0;
  60         HKEY bhk;
  61         LONG ret;
  62         DWORD i;
  63
  64         ret = RegOpenKeyEx(hk, TEXT("blobs"), 0, KEY_QUERY_VALUE, &bhk);
  65         if (ret != ERROR_SUCCESS) {
  66                 wpa_printf(MSG_DEBUG, "Could not open wpa_supplicant config "
  67                            "blobs key");
  68                 return 0; /* assume no blobs */
  69         }
  70
  71         for (i = 0; ; i++) {
  72 #define TNAMELEN 255
  73                 TCHAR name[TNAMELEN];
  74                 char data[4096];
  75                 DWORD namelen, datalen, type;
  76
  77                 namelen = TNAMELEN;
  78                 datalen = sizeof(data);
  79                 ret = RegEnumValue(bhk, i, name, &namelen, NULL, &type,
  80                                    (LPBYTE) data, &datalen);
  81
  82                 if (ret == ERROR_NO_MORE_ITEMS)
  83                         break;
  84
  85                 if (ret != ERROR_SUCCESS) {
  86                         wpa_printf(MSG_DEBUG, "RegEnumValue failed: 0x%x",
  87                                    (unsigned int) ret);
  88                         break;
  89                 }
  90
  91                 if (namelen >= TNAMELEN)
  92                         namelen = TNAMELEN - 1;
  93                 name[namelen] = TEXT('\0');
  94                 wpa_unicode2ascii_inplace(name);
  95
  96                 if (datalen >= sizeof(data))
  97                         datalen = sizeof(data) - 1;
  98
  99                 wpa_printf(MSG_MSGDUMP, "blob %d: field='%s' len %d",
 100                            (int) i, name, (int) datalen);
 101
 102                 blob = os_zalloc(sizeof(*blob));
 103                 if (blob == NULL) {
 104                         errors++;
 105                         break;
 106                 }
 107                 blob->name = os_strdup((char *) name);
 108                 blob->data = os_malloc(datalen);
 109                 if (blob->name == NULL || blob->data == NULL) {
 110                         wpa_config_free_blob(blob);
 111                         errors++;
 112                         break;
 113                 }
 114                 os_memcpy(blob->data, data, datalen);
 115                 blob->len = datalen;
 116
 117                 wpa_config_set_blob(config, blob);
 118         }
 119
 120         RegCloseKey(bhk);
 121
 122         return errors ? -1 : 0;
 123 }
 124
 125
 126 static int wpa_config_read_reg_dword(HKEY hk, const TCHAR *name, int *_val)
 127 {
 128         DWORD val, buflen;
 129         LONG ret;
 130
 131         buflen = sizeof(val);
 132         ret = RegQueryValueEx(hk, name, NULL, NULL, (LPBYTE) &val, &buflen);
 133         if (ret == ERROR_SUCCESS && buflen == sizeof(val)) {
 134                 wpa_printf(MSG_DEBUG, TSTR "=%d", name, (int) val);
 135                 *_val = val;
 136                 return 0;
 137         }
 138
 139         return -1;
 140 }
 141
 142
 143 static char * wpa_config_read_reg_string(HKEY hk, const TCHAR *name)
 144 {
 145         DWORD buflen;
 146         LONG ret;
 147         TCHAR *val;
 148
 149         buflen = 0;
 150         ret = RegQueryValueEx(hk, name, NULL, NULL, NULL, &buflen);
 151         if (ret != ERROR_SUCCESS)
 152                 return NULL;
 153         val = os_malloc(buflen);
 154         if (val == NULL)
 155                 return NULL;
 156
 157         ret = RegQueryValueEx(hk, name, NULL, NULL, (LPBYTE) val, &buflen);
 158         if (ret != ERROR_SUCCESS) {
 159                 os_free(val);
 160                 return NULL;
 161         }
 162
 163         wpa_unicode2ascii_inplace(val);
 164         wpa_printf(MSG_DEBUG, TSTR "=%s", name, (char *) val);
 165         return (char *) val;
 166 }
 167
 168
 169 #ifdef CONFIG_WPS
 170 static int wpa_config_read_global_uuid(struct wpa_config *config, HKEY hk)
 171 {
 172         char *str;
 173         int ret = 0;
 174
 175         str = wpa_config_read_reg_string(hk, TEXT("uuid"));
 176         if (str == NULL)
 177                 return 0;
 178
 179         if (uuid_str2bin(str, config->uuid))
 180                 ret = -1;
 181
 182         os_free(str);
 183
 184         return ret;
 185 }
 186
 187
 188 static int wpa_config_read_global_os_version(struct wpa_config *config,
 189                                              HKEY hk)
 190 {
 191         char *str;
 192         int ret = 0;
 193
 194         str = wpa_config_read_reg_string(hk, TEXT("os_version"));
 195         if (str == NULL)
 196                 return 0;
 197
 198         if (hexstr2bin(str, config->os_version, 4))
 199                 ret = -1;
 200
 201         os_free(str);
 202
 203         return ret;
 204 }
 205 #endif /* CONFIG_WPS */
 206
 207
 208 static int wpa_config_read_global(struct wpa_config *config, HKEY hk)
 209 {
 210         int errors = 0;
 211
 212         wpa_config_read_reg_dword(hk, TEXT("ap_scan"), &config->ap_scan);
 213         wpa_config_read_reg_dword(hk, TEXT("fast_reauth"),
 214                                   &config->fast_reauth);
 215         wpa_config_read_reg_dword(hk, TEXT("dot11RSNAConfigPMKLifetime"),
 216                                   (int *) &config->dot11RSNAConfigPMKLifetime);
 217         wpa_config_read_reg_dword(hk,
 218                                   TEXT("dot11RSNAConfigPMKReauthThreshold"),
 219                                   (int *)
 220                                   &config->dot11RSNAConfigPMKReauthThreshold);
 221         wpa_config_read_reg_dword(hk, TEXT("dot11RSNAConfigSATimeout"),
 222                                   (int *) &config->dot11RSNAConfigSATimeout);
 223         wpa_config_read_reg_dword(hk, TEXT("update_config"),
 224                                   &config->update_config);
 225
 226         if (wpa_config_read_reg_dword(hk, TEXT("eapol_version"),
 227                                       &config->eapol_version) == 0) {
 228                 if (config->eapol_version < 1 ||
 229                     config->eapol_version > 2) {
 230                         wpa_printf(MSG_ERROR, "Invalid EAPOL version (%d)",
 231                                    config->eapol_version);
 232                         errors++;
 233                 }
 234         }
 235
 236         config->ctrl_interface = wpa_config_read_reg_string(
 237                 hk, TEXT("ctrl_interface"));
 238
 239 #ifdef CONFIG_WPS
 240         if (wpa_config_read_global_uuid(config, hk))
 241                 errors++;
 242         config->device_name = wpa_config_read_reg_string(
 243                 hk, TEXT("device_name"));
 244         config->manufacturer = wpa_config_read_reg_string(
 245                 hk, TEXT("manufacturer"));
 246         config->model_name = wpa_config_read_reg_string(
 247                 hk, TEXT("model_name"));
 248         config->serial_number = wpa_config_read_reg_string(
 249                 hk, TEXT("serial_number"));
 250         {
 251                 char *t = wpa_config_read_reg_string(
 252                         hk, TEXT("device_type"));
 253                 if (t && wps_dev_type_str2bin(t, config->device_type))
 254                         errors++;
 255                 os_free(t);
 256         }
 257         config->config_methods = wpa_config_read_reg_string(
 258                 hk, TEXT("config_methods"));
 259         if (wpa_config_read_global_os_version(config, hk))
 260                 errors++;
 261         wpa_config_read_reg_dword(hk, TEXT("wps_cred_processing"),
 262                                   &config->wps_cred_processing);
 263 #endif /* CONFIG_WPS */
 264 #ifdef CONFIG_P2P
 265         config->p2p_ssid_postfix = wpa_config_read_reg_string(
 266                 hk, TEXT("p2p_ssid_postfix"));
 267         wpa_config_read_reg_dword(hk, TEXT("p2p_group_idle"),
 268                                   (int *) &config->p2p_group_idle);
 269 #endif /* CONFIG_P2P */
 270
 271         wpa_config_read_reg_dword(hk, TEXT("bss_max_count"),
 272                                   (int *) &config->bss_max_count);
 273         wpa_config_read_reg_dword(hk, TEXT("filter_ssids"),
 274                                   &config->filter_ssids);
 275         wpa_config_read_reg_dword(hk, TEXT("max_num_sta"),
 276                                   (int *) &config->max_num_sta);
 277         wpa_config_read_reg_dword(hk, TEXT("disassoc_low_ack"),
 278                                   (int *) &config->disassoc_low_ack);
 279
 280         return errors ? -1 : 0;
 281 }
 282
 283
 284 static struct wpa_ssid * wpa_config_read_network(HKEY hk, const TCHAR *netw,
 285                                                  int id)
 286 {
 287         HKEY nhk;
 288         LONG ret;
 289         DWORD i;
 290         struct wpa_ssid *ssid;
 291         int errors = 0;
 292
 293         ret = RegOpenKeyEx(hk, netw, 0, KEY_QUERY_VALUE, &nhk);
 294         if (ret != ERROR_SUCCESS) {
 295                 wpa_printf(MSG_DEBUG, "Could not open wpa_supplicant config "
 296                            "network '" TSTR "'", netw);
 297                 return NULL;
 298         }
 299
 300         wpa_printf(MSG_MSGDUMP, "Start of a new network '" TSTR "'", netw);
 301         ssid = os_zalloc(sizeof(*ssid));
 302         if (ssid == NULL) {
 303                 RegCloseKey(nhk);
 304                 return NULL;
 305         }
 306         ssid->id = id;
 307
 308         wpa_config_set_network_defaults(ssid);
 309
 310         for (i = 0; ; i++) {
 311                 TCHAR name[255], data[1024];
 312                 DWORD namelen, datalen, type;
 313
 314                 namelen = 255;
 315                 datalen = sizeof(data);
 316                 ret = RegEnumValue(nhk, i, name, &namelen, NULL, &type,
 317                                    (LPBYTE) data, &datalen);
 318
 319                 if (ret == ERROR_NO_MORE_ITEMS)
 320                         break;
 321
 322                 if (ret != ERROR_SUCCESS) {
 323                         wpa_printf(MSG_ERROR, "RegEnumValue failed: 0x%x",
 324                                    (unsigned int) ret);
 325                         break;
 326                 }
 327
 328                 if (namelen >= 255)
 329                         namelen = 255 - 1;
 330                 name[namelen] = TEXT('\0');
 331
 332                 if (datalen >= 1024)
 333                         datalen = 1024 - 1;
 334                 data[datalen] = TEXT('\0');
 335
 336                 wpa_unicode2ascii_inplace(name);
 337                 wpa_unicode2ascii_inplace(data);
 338                 if (wpa_config_set(ssid, (char *) name, (char *) data, 0) < 0)
 339                         errors++;
 340         }
 341
 342         RegCloseKey(nhk);
 343
 344         if (ssid->passphrase) {
 345                 if (ssid->psk_set) {
 346                         wpa_printf(MSG_ERROR, "Both PSK and passphrase "
 347                                    "configured for network '" TSTR "'.", netw);
 348                         errors++;
 349                 }
 350                 wpa_config_update_psk(ssid);
 351         }
 352
 353         if ((ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
 354                                WPA_KEY_MGMT_PSK_SHA256)) &&
 355             !ssid->psk_set) {
 356                 wpa_printf(MSG_ERROR, "WPA-PSK accepted for key management, "
 357                            "but no PSK configured for network '" TSTR "'.",
 358                            netw);
 359                 errors++;
 360         }
 361
 362         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 363             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 364             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 365                 /* Group cipher cannot be stronger than the pairwise cipher. */
 366                 wpa_printf(MSG_DEBUG, "Removed CCMP from group cipher "
 367                            "list since it was not allowed for pairwise "
 368                            "cipher for network '" TSTR "'.", netw);
 369                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 370         }
 371
 372         if (errors) {
 373                 wpa_config_free_ssid(ssid);
 374                 ssid = NULL;
 375         }
 376
 377         return ssid;
 378 }
 379
 380
 381 static int wpa_config_read_networks(struct wpa_config *config, HKEY hk)
 382 {
 383         HKEY nhk;
 384         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 385         int errors = 0;
 386         LONG ret;
 387         DWORD i;
 388
 389         ret = RegOpenKeyEx(hk, TEXT("networks"), 0, KEY_ENUMERATE_SUB_KEYS,
 390                            &nhk);
 391         if (ret != ERROR_SUCCESS) {
 392                 wpa_printf(MSG_ERROR, "Could not open wpa_supplicant networks "
 393                            "registry key");
 394                 return -1;
 395         }
 396
 397         for (i = 0; ; i++) {
 398                 TCHAR name[255];
 399                 DWORD namelen;
 400
 401                 namelen = 255;
 402                 ret = RegEnumKeyEx(nhk, i, name, &namelen, NULL, NULL, NULL,
 403                                    NULL);
 404
 405                 if (ret == ERROR_NO_MORE_ITEMS)
 406                         break;
 407
 408                 if (ret != ERROR_SUCCESS) {
 409                         wpa_printf(MSG_DEBUG, "RegEnumKeyEx failed: 0x%x",
 410                                    (unsigned int) ret);
 411                         break;
 412                 }
 413
 414                 if (namelen >= 255)
 415                         namelen = 255 - 1;
 416                 name[namelen] = '\0';
 417
 418                 ssid = wpa_config_read_network(nhk, name, i);
 419                 if (ssid == NULL) {
 420                         wpa_printf(MSG_ERROR, "Failed to parse network "
 421                                    "profile '%s'.", name);
 422                         errors++;
 423                         continue;
 424                 }
 425                 if (head == NULL) {
 426                         head = tail = ssid;
 427                 } else {
 428                         tail->next = ssid;
 429                         tail = ssid;
 430                 }
 431                 if (wpa_config_add_prio_network(config, ssid)) {
 432                         wpa_printf(MSG_ERROR, "Failed to add network profile "
 433                                    "'%s' to priority list.", name);
 434                         errors++;
 435                         continue;
 436                 }
 437         }
 438
 439         RegCloseKey(nhk);
 440
 441         config->ssid = head;
 442
 443         return errors ? -1 : 0;
 444 }
 445
 446
 447 struct wpa_config * wpa_config_read(const char *name)
 448 {
 449         TCHAR buf[256];
 450         int errors = 0;
 451         struct wpa_config *config;
 452         HKEY hk;
 453         LONG ret;
 454
 455         config = wpa_config_alloc_empty(NULL, NULL);
 456         if (config == NULL)
 457                 return NULL;
 458         wpa_printf(MSG_DEBUG, "Reading configuration profile '%s'", name);
 459
 460 #ifdef UNICODE
 461         _snwprintf(buf, 256, WPA_KEY_PREFIX TEXT("\\configs\\%S"), name);
 462 #else /* UNICODE */
 463         os_snprintf(buf, 256, WPA_KEY_PREFIX TEXT("\\configs\\%s"), name);
 464 #endif /* UNICODE */
 465
 466         ret = RegOpenKeyEx(WPA_KEY_ROOT, buf, 0, KEY_QUERY_VALUE, &hk);
 467         if (ret != ERROR_SUCCESS) {
 468                 wpa_printf(MSG_ERROR, "Could not open wpa_supplicant "
 469                            "configuration registry HKLM\\" TSTR, buf);
 470                 os_free(config);
 471                 return NULL;
 472         }
 473
 474         if (wpa_config_read_global(config, hk))
 475                 errors++;
 476
 477         if (wpa_config_read_networks(config, hk))
 478                 errors++;
 479
 480         if (wpa_config_read_blobs(config, hk))
 481                 errors++;
 482
 483         wpa_config_debug_dump_networks(config);
 484
 485         RegCloseKey(hk);
 486
 487         if (errors) {
 488                 wpa_config_free(config);
 489                 config = NULL;
 490         }
 491
 492         return config;
 493 }
 494
 495
 496 static int wpa_config_write_reg_dword(HKEY hk, const TCHAR *name, int val,
 497                                       int def)
 498 {
 499         LONG ret;
 500         DWORD _val = val;
 501
 502         if (val == def) {
 503                 RegDeleteValue(hk, name);
 504                 return 0;
 505         }
 506
 507         ret = RegSetValueEx(hk, name, 0, REG_DWORD, (LPBYTE) &_val,
 508                             sizeof(_val));
 509         if (ret != ERROR_SUCCESS) {
 510                 wpa_printf(MSG_ERROR, "WINREG: Failed to set %s=%d: error %d",
 511                            name, val, (int) GetLastError());
 512                 return -1;
 513         }
 514
 515         return 0;
 516 }
 517
 518
 519 static int wpa_config_write_reg_string(HKEY hk, const char *name,
 520                                        const char *val)
 521 {
 522         LONG ret;
 523         TCHAR *_name, *_val;
 524
 525         _name = wpa_strdup_tchar(name);
 526         if (_name == NULL)
 527                 return -1;
 528
 529         if (val == NULL) {
 530                 RegDeleteValue(hk, _name);
 531                 os_free(_name);
 532                 return 0;
 533         }
 534
 535         _val = wpa_strdup_tchar(val);
 536         if (_val == NULL) {
 537                 os_free(_name);
 538                 return -1;
 539         }
 540         ret = RegSetValueEx(hk, _name, 0, REG_SZ, (BYTE *) _val,
 541                             (os_strlen(val) + 1) * sizeof(TCHAR));
 542         if (ret != ERROR_SUCCESS) {
 543                 wpa_printf(MSG_ERROR, "WINREG: Failed to set %s='%s': "
 544                            "error %d", name, val, (int) GetLastError());
 545                 os_free(_name);
 546                 os_free(_val);
 547                 return -1;
 548         }
 549
 550         os_free(_name);
 551         os_free(_val);
 552         return 0;
 553 }
 554
 555
 556 static int wpa_config_write_global(struct wpa_config *config, HKEY hk)
 557 {
 558 #ifdef CONFIG_CTRL_IFACE
 559         wpa_config_write_reg_string(hk, "ctrl_interface",
 560                                     config->ctrl_interface);
 561 #endif /* CONFIG_CTRL_IFACE */
 562
 563         wpa_config_write_reg_dword(hk, TEXT("eapol_version"),
 564                                    config->eapol_version,
 565                                    DEFAULT_EAPOL_VERSION);
 566         wpa_config_write_reg_dword(hk, TEXT("ap_scan"), config->ap_scan,
 567                                    DEFAULT_AP_SCAN);
 568         wpa_config_write_reg_dword(hk, TEXT("fast_reauth"),
 569                                    config->fast_reauth, DEFAULT_FAST_REAUTH);
 570         wpa_config_write_reg_dword(hk, TEXT("dot11RSNAConfigPMKLifetime"),
 571                                    config->dot11RSNAConfigPMKLifetime, 0);
 572         wpa_config_write_reg_dword(hk,
 573                                    TEXT("dot11RSNAConfigPMKReauthThreshold"),
 574                                    config->dot11RSNAConfigPMKReauthThreshold,
 575                                    0);
 576         wpa_config_write_reg_dword(hk, TEXT("dot11RSNAConfigSATimeout"),
 577                                    config->dot11RSNAConfigSATimeout, 0);
 578         wpa_config_write_reg_dword(hk, TEXT("update_config"),
 579                                    config->update_config,
 580                                    0);
 581 #ifdef CONFIG_WPS
 582         if (!is_nil_uuid(config->uuid)) {
 583                 char buf[40];
 584                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 585                 wpa_config_write_reg_string(hk, "uuid", buf);
 586         }
 587         wpa_config_write_reg_string(hk, "device_name", config->device_name);
 588         wpa_config_write_reg_string(hk, "manufacturer", config->manufacturer);
 589         wpa_config_write_reg_string(hk, "model_name", config->model_name);
 590         wpa_config_write_reg_string(hk, "model_number", config->model_number);
 591         wpa_config_write_reg_string(hk, "serial_number",
 592                                     config->serial_number);
 593         {
 594                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 595                 buf = wps_dev_type_bin2str(config->device_type,
 596                                            _buf, sizeof(_buf));
 597                 wpa_config_write_reg_string(hk, "device_type", buf);
 598         }
 599         wpa_config_write_reg_string(hk, "config_methods",
 600                                     config->config_methods);
 601         if (WPA_GET_BE32(config->os_version)) {
 602                 char vbuf[10];
 603                 os_snprintf(vbuf, sizeof(vbuf), "%08x",
 604                             WPA_GET_BE32(config->os_version));
 605                 wpa_config_write_reg_string(hk, "os_version", vbuf);
 606         }
 607         wpa_config_write_reg_dword(hk, TEXT("wps_cred_processing"),
 608                                    config->wps_cred_processing, 0);
 609 #endif /* CONFIG_WPS */
 610 #ifdef CONFIG_P2P
 611         wpa_config_write_reg_string(hk, "p2p_ssid_postfix",
 612                                     config->p2p_ssid_postfix);
 613         wpa_config_write_reg_dword(hk, TEXT("p2p_group_idle"),
 614                                    config->p2p_group_idle, 0);
 615 #endif /* CONFIG_P2P */
 616
 617         wpa_config_write_reg_dword(hk, TEXT("bss_max_count"),
 618                                    config->bss_max_count,
 619                                    DEFAULT_BSS_MAX_COUNT);
 620         wpa_config_write_reg_dword(hk, TEXT("filter_ssids"),
 621                                    config->filter_ssids, 0);
 622         wpa_config_write_reg_dword(hk, TEXT("max_num_sta"),
 623                                    config->max_num_sta, DEFAULT_MAX_NUM_STA);
 624         wpa_config_write_reg_dword(hk, TEXT("disassoc_low_ack"),
 625                                    config->disassoc_low_ack, 0);
 626
 627         return 0;
 628 }
 629
 630
 631 static int wpa_config_delete_subkeys(HKEY hk, const TCHAR *key)
 632 {
 633         HKEY nhk;
 634         int i, errors = 0;
 635         LONG ret;
 636
 637         ret = RegOpenKeyEx(hk, key, 0, KEY_ENUMERATE_SUB_KEYS | DELETE, &nhk);
 638         if (ret != ERROR_SUCCESS) {
 639                 wpa_printf(MSG_DEBUG, "WINREG: Could not open key '" TSTR
 640                            "' for subkey deletion: error 0x%x (%d)", key,
 641                            (unsigned int) ret, (int) GetLastError());
 642                 return 0;
 643         }
 644
 645         for (i = 0; ; i++) {
 646                 TCHAR name[255];
 647                 DWORD namelen;
 648
 649                 namelen = 255;
 650                 ret = RegEnumKeyEx(nhk, i, name, &namelen, NULL, NULL, NULL,
 651                                    NULL);
 652
 653                 if (ret == ERROR_NO_MORE_ITEMS)
 654                         break;
 655
 656                 if (ret != ERROR_SUCCESS) {
 657                         wpa_printf(MSG_DEBUG, "RegEnumKeyEx failed: 0x%x (%d)",
 658                                    (unsigned int) ret, (int) GetLastError());
 659                         break;
 660                 }
 661
 662                 if (namelen >= 255)
 663                         namelen = 255 - 1;
 664                 name[namelen] = TEXT('\0');
 665
 666                 ret = RegDeleteKey(nhk, name);
 667                 if (ret != ERROR_SUCCESS) {
 668                         wpa_printf(MSG_DEBUG, "RegDeleteKey failed: 0x%x (%d)",
 669                                    (unsigned int) ret, (int) GetLastError());
 670                         errors++;
 671                 }
 672         }
 673
 674         RegCloseKey(nhk);
 675
 676         return errors ? -1 : 0;
 677 }
 678
 679
 680 static void write_str(HKEY hk, const char *field, struct wpa_ssid *ssid)
 681 {
 682         char *value = wpa_config_get(ssid, field);
 683         if (value == NULL)
 684                 return;
 685         wpa_config_write_reg_string(hk, field, value);
 686         os_free(value);
 687 }
 688
 689
 690 static void write_int(HKEY hk, const char *field, int value, int def)
 691 {
 692         char val[20];
 693         if (value == def)
 694                 return;
 695         os_snprintf(val, sizeof(val), "%d", value);
 696         wpa_config_write_reg_string(hk, field, val);
 697 }
 698
 699
 700 static void write_bssid(HKEY hk, struct wpa_ssid *ssid)
 701 {
 702         char *value = wpa_config_get(ssid, "bssid");
 703         if (value == NULL)
 704                 return;
 705         wpa_config_write_reg_string(hk, "bssid", value);
 706         os_free(value);
 707 }
 708
 709
 710 static void write_psk(HKEY hk, struct wpa_ssid *ssid)
 711 {
 712         char *value = wpa_config_get(ssid, "psk");
 713         if (value == NULL)
 714                 return;
 715         wpa_config_write_reg_string(hk, "psk", value);
 716         os_free(value);
 717 }
 718
 719
 720 static void write_proto(HKEY hk, struct wpa_ssid *ssid)
 721 {
 722         char *value;
 723
 724         if (ssid->proto == DEFAULT_PROTO)
 725                 return;
 726
 727         value = wpa_config_get(ssid, "proto");
 728         if (value == NULL)
 729                 return;
 730         if (value[0])
 731                 wpa_config_write_reg_string(hk, "proto", value);
 732         os_free(value);
 733 }
 734
 735
 736 static void write_key_mgmt(HKEY hk, struct wpa_ssid *ssid)
 737 {
 738         char *value;
 739
 740         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 741                 return;
 742
 743         value = wpa_config_get(ssid, "key_mgmt");
 744         if (value == NULL)
 745                 return;
 746         if (value[0])
 747                 wpa_config_write_reg_string(hk, "key_mgmt", value);
 748         os_free(value);
 749 }
 750
 751
 752 static void write_pairwise(HKEY hk, struct wpa_ssid *ssid)
 753 {
 754         char *value;
 755
 756         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 757                 return;
 758
 759         value = wpa_config_get(ssid, "pairwise");
 760         if (value == NULL)
 761                 return;
 762         if (value[0])
 763                 wpa_config_write_reg_string(hk, "pairwise", value);
 764         os_free(value);
 765 }
 766
 767
 768 static void write_group(HKEY hk, struct wpa_ssid *ssid)
 769 {
 770         char *value;
 771
 772         if (ssid->group_cipher == DEFAULT_GROUP)
 773                 return;
 774
 775         value = wpa_config_get(ssid, "group");
 776         if (value == NULL)
 777                 return;
 778         if (value[0])
 779                 wpa_config_write_reg_string(hk, "group", value);
 780         os_free(value);
 781 }
 782
 783
 784 static void write_auth_alg(HKEY hk, struct wpa_ssid *ssid)
 785 {
 786         char *value;
 787
 788         if (ssid->auth_alg == 0)
 789                 return;
 790
 791         value = wpa_config_get(ssid, "auth_alg");
 792         if (value == NULL)
 793                 return;
 794         if (value[0])
 795                 wpa_config_write_reg_string(hk, "auth_alg", value);
 796         os_free(value);
 797 }
 798
 799
 800 #ifdef IEEE8021X_EAPOL
 801 static void write_eap(HKEY hk, struct wpa_ssid *ssid)
 802 {
 803         char *value;
 804
 805         value = wpa_config_get(ssid, "eap");
 806         if (value == NULL)
 807                 return;
 808
 809         if (value[0])
 810                 wpa_config_write_reg_string(hk, "eap", value);
 811         os_free(value);
 812 }
 813 #endif /* IEEE8021X_EAPOL */
 814
 815
 816 static void write_wep_key(HKEY hk, int idx, struct wpa_ssid *ssid)
 817 {
 818         char field[20], *value;
 819
 820         os_snprintf(field, sizeof(field), "wep_key%d", idx);
 821         value = wpa_config_get(ssid, field);
 822         if (value) {
 823                 wpa_config_write_reg_string(hk, field, value);
 824                 os_free(value);
 825         }
 826 }
 827
 828
 829 static int wpa_config_write_network(HKEY hk, struct wpa_ssid *ssid, int id)
 830 {
 831         int i, errors = 0;
 832         HKEY nhk, netw;
 833         LONG ret;
 834         TCHAR name[5];
 835
 836         ret = RegOpenKeyEx(hk, TEXT("networks"), 0, KEY_CREATE_SUB_KEY, &nhk);
 837         if (ret != ERROR_SUCCESS) {
 838                 wpa_printf(MSG_DEBUG, "WINREG: Could not open networks key "
 839                            "for subkey addition: error 0x%x (%d)",
 840                            (unsigned int) ret, (int) GetLastError());
 841                 return 0;
 842         }
 843
 844 #ifdef UNICODE
 845         wsprintf(name, L"%04d", id);
 846 #else /* UNICODE */
 847         os_snprintf(name, sizeof(name), "%04d", id);
 848 #endif /* UNICODE */
 849         ret = RegCreateKeyEx(nhk, name, 0, NULL, 0, KEY_WRITE, NULL, &netw,
 850                              NULL);
 851         RegCloseKey(nhk);
 852         if (ret != ERROR_SUCCESS) {
 853                 wpa_printf(MSG_DEBUG, "WINREG: Could not add network key '%s':"
 854                            " error 0x%x (%d)",
 855                            name, (unsigned int) ret, (int) GetLastError());
 856                 return -1;
 857         }
 858
 859 #define STR(t) write_str(netw, #t, ssid)
 860 #define INT(t) write_int(netw, #t, ssid->t, 0)
 861 #define INTe(t) write_int(netw, #t, ssid->eap.t, 0)
 862 #define INT_DEF(t, def) write_int(netw, #t, ssid->t, def)
 863 #define INT_DEFe(t, def) write_int(netw, #t, ssid->eap.t, def)
 864
 865         STR(ssid);
 866         INT(scan_ssid);
 867         write_bssid(netw, ssid);
 868         write_psk(netw, ssid);
 869         write_proto(netw, ssid);
 870         write_key_mgmt(netw, ssid);
 871         write_pairwise(netw, ssid);
 872         write_group(netw, ssid);
 873         write_auth_alg(netw, ssid);
 874 #ifdef IEEE8021X_EAPOL
 875         write_eap(netw, ssid);
 876         STR(identity);
 877         STR(anonymous_identity);
 878         STR(password);
 879         STR(ca_cert);
 880         STR(ca_path);
 881         STR(client_cert);
 882         STR(private_key);
 883         STR(private_key_passwd);
 884         STR(dh_file);
 885         STR(subject_match);
 886         STR(altsubject_match);
 887         STR(ca_cert2);
 888         STR(ca_path2);
 889         STR(client_cert2);
 890         STR(private_key2);
 891         STR(private_key2_passwd);
 892         STR(dh_file2);
 893         STR(subject_match2);
 894         STR(altsubject_match2);
 895         STR(phase1);
 896         STR(phase2);
 897         STR(pcsc);
 898         STR(pin);
 899         STR(engine_id);
 900         STR(key_id);
 901         STR(cert_id);
 902         STR(ca_cert_id);
 903         STR(key2_id);
 904         STR(pin2);
 905         STR(engine2_id);
 906         STR(cert2_id);
 907         STR(ca_cert2_id);
 908         INTe(engine);
 909         INTe(engine2);
 910         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 911 #endif /* IEEE8021X_EAPOL */
 912         for (i = 0; i < 4; i++)
 913                 write_wep_key(netw, i, ssid);
 914         INT(wep_tx_keyidx);
 915         INT(priority);
 916 #ifdef IEEE8021X_EAPOL
 917         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 918         STR(pac_file);
 919         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 920 #endif /* IEEE8021X_EAPOL */
 921         INT(mode);
 922         INT(proactive_key_caching);
 923         INT(disabled);
 924         INT(peerkey);
 925 #ifdef CONFIG_IEEE80211W
 926         INT(ieee80211w);
 927 #endif /* CONFIG_IEEE80211W */
 928         STR(id_str);
 929
 930 #undef STR
 931 #undef INT
 932 #undef INT_DEF
 933
 934         RegCloseKey(netw);
 935
 936         return errors ? -1 : 0;
 937 }
 938
 939
 940 static int wpa_config_write_blob(HKEY hk, struct wpa_config_blob *blob)
 941 {
 942         HKEY bhk;
 943         LONG ret;
 944         TCHAR *name;
 945
 946         ret = RegCreateKeyEx(hk, TEXT("blobs"), 0, NULL, 0, KEY_WRITE, NULL,
 947                              &bhk, NULL);
 948         if (ret != ERROR_SUCCESS) {
 949                 wpa_printf(MSG_DEBUG, "WINREG: Could not add blobs key: "
 950                            "error 0x%x (%d)",
 951                            (unsigned int) ret, (int) GetLastError());
 952                 return -1;
 953         }
 954
 955         name = wpa_strdup_tchar(blob->name);
 956         ret = RegSetValueEx(bhk, name, 0, REG_BINARY, blob->data,
 957                             blob->len);
 958         if (ret != ERROR_SUCCESS) {
 959                 wpa_printf(MSG_ERROR, "WINREG: Failed to set blob %s': "
 960                            "error 0x%x (%d)", blob->name, (unsigned int) ret,
 961                            (int) GetLastError());
 962                 RegCloseKey(bhk);
 963                 os_free(name);
 964                 return -1;
 965         }
 966         os_free(name);
 967
 968         RegCloseKey(bhk);
 969
 970         return 0;
 971 }
 972
 973
 974 int wpa_config_write(const char *name, struct wpa_config *config)
 975 {
 976         TCHAR buf[256];
 977         HKEY hk;
 978         LONG ret;
 979         int errors = 0;
 980         struct wpa_ssid *ssid;
 981         struct wpa_config_blob *blob;
 982         int id;
 983
 984         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 985
 986 #ifdef UNICODE
 987         _snwprintf(buf, 256, WPA_KEY_PREFIX TEXT("\\configs\\%S"), name);
 988 #else /* UNICODE */
 989         os_snprintf(buf, 256, WPA_KEY_PREFIX TEXT("\\configs\\%s"), name);
 990 #endif /* UNICODE */
 991
 992         ret = RegOpenKeyEx(WPA_KEY_ROOT, buf, 0, KEY_SET_VALUE | DELETE, &hk);
 993         if (ret != ERROR_SUCCESS) {
 994                 wpa_printf(MSG_ERROR, "Could not open wpa_supplicant "
 995                            "configuration registry %s: error %d", buf,
 996                            (int) GetLastError());
 997                 return -1;
 998         }
 999
1000         if (wpa_config_write_global(config, hk)) {
1001                 wpa_printf(MSG_ERROR, "Failed to write global configuration "
1002                            "data");
1003                 errors++;
1004         }
1005
1006         wpa_config_delete_subkeys(hk, TEXT("networks"));
1007         for (ssid = config->ssid, id = 0; ssid; ssid = ssid->next, id++) {
1008                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS)
1009                         continue; /* do not save temporary WPS networks */
1010                 if (wpa_config_write_network(hk, ssid, id))
1011                         errors++;
1012         }
1013
1014         RegDeleteKey(hk, TEXT("blobs"));
1015         for (blob = config->blobs; blob; blob = blob->next) {
1016                 if (wpa_config_write_blob(hk, blob))
1017                         errors++;
1018         }
1019
1020         RegCloseKey(hk);
1021
1022         wpa_printf(MSG_DEBUG, "Configuration '%s' written %ssuccessfully",
1023                    name, errors ? "un" : "");
1024         return errors ? -1 : 0;
1025 }