wpa_supplicant/config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   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 text files. All the
  15  * configuration information is stored in a text file that uses a format
  16  * described in the sample configuration file, wpa_supplicant.conf.
  17  */
  18
  19 #include "includes.h"
  20
  21 #include "common.h"
  22 #include "config.h"
  23 #include "base64.h"
  24 #include "uuid.h"
  25 #include "eap_peer/eap_methods.h"
  26
  27
  28 /**
  29  * wpa_config_get_line - Read the next configuration file line
  30  * @s: Buffer for the line
  31  * @size: The buffer length
  32  * @stream: File stream to read from
  33  * @line: Pointer to a variable storing the file line number
  34  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  35  * %NULL if not needed (returned value used instead)
  36  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  37  * more text lines are available.
  38  *
  39  * This function reads the next non-empty line from the configuration file and
  40  * removes comments. The returned string is guaranteed to be null-terminated.
  41  */
  42 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  43                                   char **_pos)
  44 {
  45         char *pos, *end, *sstart;
  46
  47         while (fgets(s, size, stream)) {
  48                 (*line)++;
  49                 s[size - 1] = '\0';
  50                 pos = s;
  51
  52                 /* Skip white space from the beginning of line. */
  53                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  54                         pos++;
  55
  56                 /* Skip comment lines and empty lines */
  57                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  58                         continue;
  59
  60                 /*
  61                  * Remove # comments unless they are within a double quoted
  62                  * string.
  63                  */
  64                 sstart = os_strchr(pos, '"');
  65                 if (sstart)
  66                         sstart = os_strrchr(sstart + 1, '"');
  67                 if (!sstart)
  68                         sstart = pos;
  69                 end = os_strchr(sstart, '#');
  70                 if (end)
  71                         *end-- = '\0';
  72                 else
  73                         end = pos + os_strlen(pos) - 1;
  74
  75                 /* Remove trailing white space. */
  76                 while (end > pos &&
  77                        (*end == '\n' || *end == ' ' || *end == '\t' ||
  78                         *end == '\r'))
  79                         *end-- = '\0';
  80
  81                 if (*pos == '\0')
  82                         continue;
  83
  84                 if (_pos)
  85                         *_pos = pos;
  86                 return pos;
  87         }
  88
  89         if (_pos)
  90                 *_pos = NULL;
  91         return NULL;
  92 }
  93
  94
  95 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
  96 {
  97         int errors = 0;
  98
  99         if (ssid->passphrase) {
 100                 if (ssid->psk_set) {
 101                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
 102                                    "passphrase configured.", line);
 103                         errors++;
 104                 }
 105                 wpa_config_update_psk(ssid);
 106         }
 107
 108         if ((ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
 109                                WPA_KEY_MGMT_PSK_SHA256)) &&
 110             !ssid->psk_set) {
 111                 wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
 112                            "management, but no PSK configured.", line);
 113                 errors++;
 114         }
 115
 116         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 117             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 118             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 119                 /* Group cipher cannot be stronger than the pairwise cipher. */
 120                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 121                            " list since it was not allowed for pairwise "
 122                            "cipher", line);
 123                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 124         }
 125
 126         return errors;
 127 }
 128
 129
 130 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 131 {
 132         struct wpa_ssid *ssid;
 133         int errors = 0, end = 0;
 134         char buf[256], *pos, *pos2;
 135
 136         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 137                    *line);
 138         ssid = os_zalloc(sizeof(*ssid));
 139         if (ssid == NULL)
 140                 return NULL;
 141         ssid->id = id;
 142
 143         wpa_config_set_network_defaults(ssid);
 144
 145         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 146                 if (os_strcmp(pos, "}") == 0) {
 147                         end = 1;
 148                         break;
 149                 }
 150
 151                 pos2 = os_strchr(pos, '=');
 152                 if (pos2 == NULL) {
 153                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 154                                    "'%s'.", *line, pos);
 155                         errors++;
 156                         continue;
 157                 }
 158
 159                 *pos2++ = '\0';
 160                 if (*pos2 == '"') {
 161                         if (os_strchr(pos2 + 1, '"') == NULL) {
 162                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 163                                            "quotation '%s'.", *line, pos2);
 164                                 errors++;
 165                                 continue;
 166                         }
 167                 }
 168
 169                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 170                         errors++;
 171         }
 172
 173         if (!end) {
 174                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 175                            "terminated properly.", *line);
 176                 errors++;
 177         }
 178
 179         errors += wpa_config_validate_network(ssid, *line);
 180
 181         if (errors) {
 182                 wpa_config_free_ssid(ssid);
 183                 ssid = NULL;
 184         }
 185
 186         return ssid;
 187 }
 188
 189
 190 #ifndef CONFIG_NO_CONFIG_BLOBS
 191 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 192                                                      const char *name)
 193 {
 194         struct wpa_config_blob *blob;
 195         char buf[256], *pos;
 196         unsigned char *encoded = NULL, *nencoded;
 197         int end = 0;
 198         size_t encoded_len = 0, len;
 199
 200         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 201                    *line, name);
 202
 203         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 204                 if (os_strcmp(pos, "}") == 0) {
 205                         end = 1;
 206                         break;
 207                 }
 208
 209                 len = os_strlen(pos);
 210                 nencoded = os_realloc(encoded, encoded_len + len);
 211                 if (nencoded == NULL) {
 212                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 213                                    "blob", *line);
 214                         os_free(encoded);
 215                         return NULL;
 216                 }
 217                 encoded = nencoded;
 218                 os_memcpy(encoded + encoded_len, pos, len);
 219                 encoded_len += len;
 220         }
 221
 222         if (!end) {
 223                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 224                            "properly", *line);
 225                 os_free(encoded);
 226                 return NULL;
 227         }
 228
 229         blob = os_zalloc(sizeof(*blob));
 230         if (blob == NULL) {
 231                 os_free(encoded);
 232                 return NULL;
 233         }
 234         blob->name = os_strdup(name);
 235         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 236         os_free(encoded);
 237
 238         if (blob->name == NULL || blob->data == NULL) {
 239                 wpa_config_free_blob(blob);
 240                 return NULL;
 241         }
 242
 243         return blob;
 244 }
 245
 246
 247 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 248                                    int *line, char *bname)
 249 {
 250         char *name_end;
 251         struct wpa_config_blob *blob;
 252
 253         name_end = os_strchr(bname, '=');
 254         if (name_end == NULL) {
 255                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 256                            *line);
 257                 return -1;
 258         }
 259         *name_end = '\0';
 260
 261         blob = wpa_config_read_blob(f, line, bname);
 262         if (blob == NULL) {
 263                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 264                            *line, bname);
 265                 return -1;
 266         }
 267         wpa_config_set_blob(config, blob);
 268         return 0;
 269 }
 270 #endif /* CONFIG_NO_CONFIG_BLOBS */
 271
 272
 273 struct global_parse_data {
 274         char *name;
 275         int (*parser)(const struct global_parse_data *data,
 276                       struct wpa_config *config, int line, const char *value);
 277 };
 278
 279
 280 static int wpa_config_process_country(const struct global_parse_data *data,
 281                                       struct wpa_config *config, int line,
 282                                       const char *pos)
 283 {
 284         if (!pos[0] || !pos[1]) {
 285                 wpa_printf(MSG_DEBUG, "Invalid country set");
 286                 return -1;
 287         }
 288         config->country[0] = pos[0];
 289         config->country[1] = pos[1];
 290         wpa_printf(MSG_DEBUG, "country='%c%c'",
 291                    config->country[0], config->country[1]);
 292         return 0;
 293 }
 294
 295
 296 #ifdef CONFIG_CTRL_IFACE
 297 static int wpa_config_process_ctrl_interface(
 298         const struct global_parse_data *data, struct wpa_config *config,
 299         int line, const char *pos)
 300 {
 301         os_free(config->ctrl_interface);
 302         config->ctrl_interface = os_strdup(pos);
 303         wpa_printf(MSG_DEBUG, "ctrl_interface='%s'", config->ctrl_interface);
 304         return 0;
 305 }
 306
 307
 308 static int wpa_config_process_ctrl_interface_group(
 309         const struct global_parse_data *data, struct wpa_config *config,
 310         int line, const char *pos)
 311 {
 312         os_free(config->ctrl_interface_group);
 313         config->ctrl_interface_group = os_strdup(pos);
 314         wpa_printf(MSG_DEBUG, "ctrl_interface_group='%s' (DEPRECATED)",
 315                    config->ctrl_interface_group);
 316         return 0;
 317 }
 318 #endif /* CONFIG_CTRL_IFACE */
 319
 320
 321 static int wpa_config_process_eapol_version(
 322         const struct global_parse_data *data, struct wpa_config *config,
 323         int line, const char *pos)
 324 {
 325         config->eapol_version = atoi(pos);
 326         if (config->eapol_version < 1 || config->eapol_version > 2) {
 327                 wpa_printf(MSG_ERROR, "Line %d: Invalid EAPOL version (%d): "
 328                            "'%s'.", line, config->eapol_version, pos);
 329                 return -1;
 330         }
 331         wpa_printf(MSG_DEBUG, "eapol_version=%d", config->eapol_version);
 332         return 0;
 333 }
 334
 335
 336 static int wpa_config_process_ap_scan(const struct global_parse_data *data,
 337                                       struct wpa_config *config, int line,
 338                                       const char *pos)
 339 {
 340         config->ap_scan = atoi(pos);
 341         wpa_printf(MSG_DEBUG, "ap_scan=%d", config->ap_scan);
 342         return 0;
 343 }
 344
 345
 346 static int wpa_config_process_fast_reauth(const struct global_parse_data *data,
 347                                           struct wpa_config *config, int line,
 348                                           const char *pos)
 349 {
 350         config->fast_reauth = atoi(pos);
 351         wpa_printf(MSG_DEBUG, "fast_reauth=%d", config->fast_reauth);
 352         return 0;
 353 }
 354
 355
 356 #ifdef EAP_TLS_OPENSSL
 357
 358 static int wpa_config_process_opensc_engine_path(
 359         const struct global_parse_data *data, struct wpa_config *config,
 360         int line, const char *pos)
 361 {
 362         os_free(config->opensc_engine_path);
 363         config->opensc_engine_path = os_strdup(pos);
 364         wpa_printf(MSG_DEBUG, "opensc_engine_path='%s'",
 365                    config->opensc_engine_path);
 366         return 0;
 367 }
 368
 369
 370 static int wpa_config_process_pkcs11_engine_path(
 371         const struct global_parse_data *data, struct wpa_config *config,
 372         int line, const char *pos)
 373 {
 374         os_free(config->pkcs11_engine_path);
 375         config->pkcs11_engine_path = os_strdup(pos);
 376         wpa_printf(MSG_DEBUG, "pkcs11_engine_path='%s'",
 377                    config->pkcs11_engine_path);
 378         return 0;
 379 }
 380
 381
 382 static int wpa_config_process_pkcs11_module_path(
 383         const struct global_parse_data *data, struct wpa_config *config,
 384         int line, const char *pos)
 385 {
 386         os_free(config->pkcs11_module_path);
 387         config->pkcs11_module_path = os_strdup(pos);
 388         wpa_printf(MSG_DEBUG, "pkcs11_module_path='%s'",
 389                    config->pkcs11_module_path);
 390         return 0;
 391 }
 392
 393 #endif /* EAP_TLS_OPENSSL */
 394
 395
 396 static int wpa_config_process_driver_param(
 397         const struct global_parse_data *data, struct wpa_config *config,
 398         int line, const char *pos)
 399 {
 400         os_free(config->driver_param);
 401         config->driver_param = os_strdup(pos);
 402         wpa_printf(MSG_DEBUG, "driver_param='%s'", config->driver_param);
 403         return 0;
 404 }
 405
 406
 407 static int wpa_config_process_dot11RSNAConfigPMKLifetime(
 408         const struct global_parse_data *data,
 409         struct wpa_config *config, int line, const char *pos)
 410 {
 411         config->dot11RSNAConfigPMKLifetime = atoi(pos);
 412         wpa_printf(MSG_DEBUG, "dot11RSNAConfigPMKLifetime=%d",
 413                    config->dot11RSNAConfigPMKLifetime);
 414         return 0;
 415 }
 416
 417
 418 static int wpa_config_process_dot11RSNAConfigPMKReauthThreshold(
 419         const struct global_parse_data *data,
 420         struct wpa_config *config, int line, const char *pos)
 421 {
 422         config->dot11RSNAConfigPMKReauthThreshold = atoi(pos);
 423         wpa_printf(MSG_DEBUG, "dot11RSNAConfigPMKReauthThreshold=%d",
 424                    config->dot11RSNAConfigPMKReauthThreshold);
 425         return 0;
 426 }
 427
 428
 429 static int wpa_config_process_dot11RSNAConfigSATimeout(
 430         const struct global_parse_data *data,
 431         struct wpa_config *config, int line, const char *pos)
 432 {
 433         config->dot11RSNAConfigSATimeout = atoi(pos);
 434         wpa_printf(MSG_DEBUG, "dot11RSNAConfigSATimeout=%d",
 435                    config->dot11RSNAConfigSATimeout);
 436         return 0;
 437 }
 438
 439
 440 #ifndef CONFIG_NO_CONFIG_WRITE
 441 static int wpa_config_process_update_config(
 442         const struct global_parse_data *data, struct wpa_config *config,
 443         int line, const char *pos)
 444 {
 445         config->update_config = atoi(pos);
 446         wpa_printf(MSG_DEBUG, "update_config=%d", config->update_config);
 447         return 0;
 448 }
 449 #endif /* CONFIG_NO_CONFIG_WRITE */
 450
 451
 452 static int wpa_config_process_load_dynamic_eap(
 453         const struct global_parse_data *data, struct wpa_config *config,
 454         int line, const char *so)
 455 {
 456         int ret;
 457         wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
 458         ret = eap_peer_method_load(so);
 459         if (ret == -2) {
 460                 wpa_printf(MSG_DEBUG, "This EAP type was already loaded - not "
 461                            "reloading.");
 462         } else if (ret) {
 463                 wpa_printf(MSG_ERROR, "Line %d: Failed to load dynamic EAP "
 464                            "method '%s'.", line, so);
 465                 return -1;
 466         }
 467
 468         return 0;
 469 }
 470
 471
 472 #ifdef CONFIG_WPS
 473
 474 static int wpa_config_process_uuid(const struct global_parse_data *data,
 475                                    struct wpa_config *config, int line,
 476                                    const char *pos)
 477 {
 478         char buf[40];
 479         if (uuid_str2bin(pos, config->uuid)) {
 480                 wpa_printf(MSG_ERROR, "Line %d: invalid UUID", line);
 481                 return -1;
 482         }
 483         uuid_bin2str(config->uuid, buf, sizeof(buf));
 484         wpa_printf(MSG_DEBUG, "uuid=%s", buf);
 485         return 0;
 486 }
 487
 488
 489 static int wpa_config_process_device_name(const struct global_parse_data *data,
 490                                           struct wpa_config *config, int line,
 491                                           const char *pos)
 492 {
 493         if (os_strlen(pos) > 32)
 494                 return -1;
 495         os_free(config->device_name);
 496         config->device_name = os_strdup(pos);
 497         wpa_printf(MSG_DEBUG, "device_name='%s'", config->device_name);
 498         return 0;
 499 }
 500
 501
 502 static int wpa_config_process_manufacturer(
 503         const struct global_parse_data *data, struct wpa_config *config,
 504         int line, const char *pos)
 505 {
 506         if (os_strlen(pos) > 64)
 507                 return -1;
 508         os_free(config->manufacturer);
 509         config->manufacturer = os_strdup(pos);
 510         wpa_printf(MSG_DEBUG, "manufacturer='%s'", config->manufacturer);
 511         return 0;
 512 }
 513
 514
 515 static int wpa_config_process_model_name(const struct global_parse_data *data,
 516                                          struct wpa_config *config, int line,
 517                                          const char *pos)
 518 {
 519         if (os_strlen(pos) > 32)
 520                 return -1;
 521         os_free(config->model_name);
 522         config->model_name = os_strdup(pos);
 523         wpa_printf(MSG_DEBUG, "model_name='%s'", config->model_name);
 524         return 0;
 525 }
 526
 527
 528 static int wpa_config_process_model_number(
 529         const struct global_parse_data *data, struct wpa_config *config,
 530         int line, const char *pos)
 531 {
 532         if (os_strlen(pos) > 32)
 533                 return -1;
 534         os_free(config->model_number);
 535         config->model_number = os_strdup(pos);
 536         wpa_printf(MSG_DEBUG, "model_number='%s'", config->model_number);
 537         return 0;
 538 }
 539
 540
 541 static int wpa_config_process_serial_number(
 542         const struct global_parse_data *data, struct wpa_config *config,
 543         int line, const char *pos)
 544 {
 545         if (os_strlen(pos) > 32)
 546                 return -1;
 547         os_free(config->serial_number);
 548         config->serial_number = os_strdup(pos);
 549         wpa_printf(MSG_DEBUG, "serial_number='%s'", config->serial_number);
 550         return 0;
 551 }
 552
 553
 554 static int wpa_config_process_device_type(const struct global_parse_data *data,
 555                                           struct wpa_config *config, int line,
 556                                           const char *pos)
 557 {
 558         os_free(config->device_type);
 559         config->device_type = os_strdup(pos);
 560         wpa_printf(MSG_DEBUG, "device_type='%s'", config->device_type);
 561         return 0;
 562 }
 563
 564
 565 static int wpa_config_process_os_version(const struct global_parse_data *data,
 566                                          struct wpa_config *config, int line,
 567                                          const char *pos)
 568 {
 569         if (hexstr2bin(pos, config->os_version, 4)) {
 570                 wpa_printf(MSG_ERROR, "Line %d: invalid os_version", line);
 571                 return -1;
 572         }
 573         wpa_printf(MSG_DEBUG, "os_version=%08x",
 574                    WPA_GET_BE32(config->os_version));
 575         return 0;
 576 }
 577
 578 #endif /* CONFIG_WPS */
 579
 580
 581 #define FUNC(f) #f, wpa_config_process_ ## f
 582
 583 static const struct global_parse_data global_fields[] = {
 584 #ifdef CONFIG_CTRL_IFACE
 585         { FUNC(ctrl_interface) },
 586         { FUNC(ctrl_interface_group) },
 587 #endif /* CONFIG_CTRL_IFACE */
 588         { FUNC(eapol_version) },
 589         { FUNC(ap_scan) },
 590         { FUNC(fast_reauth) },
 591 #ifdef EAP_TLS_OPENSSL
 592         { FUNC(opensc_engine_path) },
 593         { FUNC(pkcs11_engine_path) },
 594         { FUNC(pkcs11_module_path) },
 595 #endif /* EAP_TLS_OPENSSL */
 596         { FUNC(driver_param) },
 597         { FUNC(dot11RSNAConfigPMKLifetime) },
 598         { FUNC(dot11RSNAConfigPMKReauthThreshold) },
 599         { FUNC(dot11RSNAConfigSATimeout) },
 600 #ifndef CONFIG_NO_CONFIG_WRITE
 601         { FUNC(update_config) },
 602 #endif /* CONFIG_NO_CONFIG_WRITE */
 603         { FUNC(load_dynamic_eap) },
 604 #ifdef CONFIG_WPS
 605         { FUNC(uuid) },
 606         { FUNC(device_name) },
 607         { FUNC(manufacturer) },
 608         { FUNC(model_name) },
 609         { FUNC(model_number) },
 610         { FUNC(serial_number) },
 611         { FUNC(device_type) },
 612         { FUNC(os_version) },
 613 #endif /* CONFIG_WPS */
 614         { FUNC(country) }
 615 };
 616 #define NUM_GLOBAL_FIELDS (sizeof(global_fields) / sizeof(global_fields[0]))
 617
 618
 619 static int wpa_config_process_global(struct wpa_config *config, char *pos,
 620                                      int line)
 621 {
 622         size_t i;
 623         int ret = 0;
 624
 625         for (i = 0; i < NUM_GLOBAL_FIELDS; i++) {
 626                 const struct global_parse_data *field = &global_fields[i];
 627                 size_t flen = os_strlen(field->name);
 628                 if (os_strncmp(pos, field->name, flen) != 0 ||
 629                     pos[flen] != '=')
 630                         continue;
 631
 632                 if (field->parser(field, config, line, pos + flen + 1)) {
 633                         wpa_printf(MSG_ERROR, "Line %d: failed to "
 634                                    "parse '%s'.", line, pos);
 635                         ret = -1;
 636                 }
 637                 break;
 638         }
 639         if (i == NUM_GLOBAL_FIELDS) {
 640                 wpa_printf(MSG_ERROR, "Line %d: unknown global field '%s'.",
 641                            line, pos);
 642                 ret = -1;
 643         }
 644
 645         return ret;
 646 }
 647
 648
 649 struct wpa_config * wpa_config_read(const char *name)
 650 {
 651         FILE *f;
 652         char buf[256], *pos;
 653         int errors = 0, line = 0;
 654         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 655         struct wpa_config *config;
 656         int id = 0;
 657
 658         config = wpa_config_alloc_empty(NULL, NULL);
 659         if (config == NULL)
 660                 return NULL;
 661         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 662         f = fopen(name, "r");
 663         if (f == NULL) {
 664                 os_free(config);
 665                 return NULL;
 666         }
 667
 668         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 669                 if (os_strcmp(pos, "network={") == 0) {
 670                         ssid = wpa_config_read_network(f, &line, id++);
 671                         if (ssid == NULL) {
 672                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 673                                            "parse network block.", line);
 674                                 errors++;
 675                                 continue;
 676                         }
 677                         if (head == NULL) {
 678                                 head = tail = ssid;
 679                         } else {
 680                                 tail->next = ssid;
 681                                 tail = ssid;
 682                         }
 683                         if (wpa_config_add_prio_network(config, ssid)) {
 684                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 685                                            "network block to priority list.",
 686                                            line);
 687                                 errors++;
 688                                 continue;
 689                         }
 690 #ifndef CONFIG_NO_CONFIG_BLOBS
 691                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 692                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 693                             < 0) {
 694                                 errors++;
 695                                 continue;
 696                         }
 697 #endif /* CONFIG_NO_CONFIG_BLOBS */
 698                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 699                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 700                                    "line '%s'.", line, pos);
 701                         errors++;
 702                         continue;
 703                 }
 704         }
 705
 706         fclose(f);
 707
 708         config->ssid = head;
 709         wpa_config_debug_dump_networks(config);
 710
 711         if (errors) {
 712                 wpa_config_free(config);
 713                 config = NULL;
 714                 head = NULL;
 715         }
 716
 717         return config;
 718 }
 719
 720
 721 #ifndef CONFIG_NO_CONFIG_WRITE
 722
 723 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 724 {
 725         char *value = wpa_config_get(ssid, field);
 726         if (value == NULL)
 727                 return;
 728         fprintf(f, "\t%s=%s\n", field, value);
 729         os_free(value);
 730 }
 731
 732
 733 static void write_int(FILE *f, const char *field, int value, int def)
 734 {
 735         if (value == def)
 736                 return;
 737         fprintf(f, "\t%s=%d\n", field, value);
 738 }
 739
 740
 741 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 742 {
 743         char *value = wpa_config_get(ssid, "bssid");
 744         if (value == NULL)
 745                 return;
 746         fprintf(f, "\tbssid=%s\n", value);
 747         os_free(value);
 748 }
 749
 750
 751 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 752 {
 753         char *value = wpa_config_get(ssid, "psk");
 754         if (value == NULL)
 755                 return;
 756         fprintf(f, "\tpsk=%s\n", value);
 757         os_free(value);
 758 }
 759
 760
 761 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 762 {
 763         char *value;
 764
 765         if (ssid->proto == DEFAULT_PROTO)
 766                 return;
 767
 768         value = wpa_config_get(ssid, "proto");
 769         if (value == NULL)
 770                 return;
 771         if (value[0])
 772                 fprintf(f, "\tproto=%s\n", value);
 773         os_free(value);
 774 }
 775
 776
 777 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 778 {
 779         char *value;
 780
 781         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 782                 return;
 783
 784         value = wpa_config_get(ssid, "key_mgmt");
 785         if (value == NULL)
 786                 return;
 787         if (value[0])
 788                 fprintf(f, "\tkey_mgmt=%s\n", value);
 789         os_free(value);
 790 }
 791
 792
 793 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 794 {
 795         char *value;
 796
 797         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 798                 return;
 799
 800         value = wpa_config_get(ssid, "pairwise");
 801         if (value == NULL)
 802                 return;
 803         if (value[0])
 804                 fprintf(f, "\tpairwise=%s\n", value);
 805         os_free(value);
 806 }
 807
 808
 809 static void write_group(FILE *f, struct wpa_ssid *ssid)
 810 {
 811         char *value;
 812
 813         if (ssid->group_cipher == DEFAULT_GROUP)
 814                 return;
 815
 816         value = wpa_config_get(ssid, "group");
 817         if (value == NULL)
 818                 return;
 819         if (value[0])
 820                 fprintf(f, "\tgroup=%s\n", value);
 821         os_free(value);
 822 }
 823
 824
 825 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 826 {
 827         char *value;
 828
 829         if (ssid->auth_alg == 0)
 830                 return;
 831
 832         value = wpa_config_get(ssid, "auth_alg");
 833         if (value == NULL)
 834                 return;
 835         if (value[0])
 836                 fprintf(f, "\tauth_alg=%s\n", value);
 837         os_free(value);
 838 }
 839
 840
 841 #ifdef IEEE8021X_EAPOL
 842 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 843 {
 844         char *value;
 845
 846         value = wpa_config_get(ssid, "eap");
 847         if (value == NULL)
 848                 return;
 849
 850         if (value[0])
 851                 fprintf(f, "\teap=%s\n", value);
 852         os_free(value);
 853 }
 854 #endif /* IEEE8021X_EAPOL */
 855
 856
 857 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 858 {
 859         char field[20], *value;
 860         int res;
 861
 862         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 863         if (res < 0 || (size_t) res >= sizeof(field))
 864                 return;
 865         value = wpa_config_get(ssid, field);
 866         if (value) {
 867                 fprintf(f, "\t%s=%s\n", field, value);
 868                 os_free(value);
 869         }
 870 }
 871
 872
 873 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 874 {
 875         int i;
 876
 877 #define STR(t) write_str(f, #t, ssid)
 878 #define INT(t) write_int(f, #t, ssid->t, 0)
 879 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 880 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 881 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 882
 883         STR(ssid);
 884         INT(scan_ssid);
 885         write_bssid(f, ssid);
 886         write_psk(f, ssid);
 887         write_proto(f, ssid);
 888         write_key_mgmt(f, ssid);
 889         write_pairwise(f, ssid);
 890         write_group(f, ssid);
 891         write_auth_alg(f, ssid);
 892 #ifdef IEEE8021X_EAPOL
 893         write_eap(f, ssid);
 894         STR(identity);
 895         STR(anonymous_identity);
 896         STR(password);
 897         STR(ca_cert);
 898         STR(ca_path);
 899         STR(client_cert);
 900         STR(private_key);
 901         STR(private_key_passwd);
 902         STR(dh_file);
 903         STR(subject_match);
 904         STR(altsubject_match);
 905         STR(ca_cert2);
 906         STR(ca_path2);
 907         STR(client_cert2);
 908         STR(private_key2);
 909         STR(private_key2_passwd);
 910         STR(dh_file2);
 911         STR(subject_match2);
 912         STR(altsubject_match2);
 913         STR(phase1);
 914         STR(phase2);
 915         STR(pcsc);
 916         STR(pin);
 917         STR(engine_id);
 918         STR(key_id);
 919         STR(cert_id);
 920         STR(ca_cert_id);
 921         STR(key2_id);
 922         STR(pin2);
 923         STR(engine2_id);
 924         STR(cert2_id);
 925         STR(ca_cert2_id);
 926         INTe(engine);
 927         INTe(engine2);
 928         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 929 #endif /* IEEE8021X_EAPOL */
 930         for (i = 0; i < 4; i++)
 931                 write_wep_key(f, i, ssid);
 932         INT(wep_tx_keyidx);
 933         INT(priority);
 934 #ifdef IEEE8021X_EAPOL
 935         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 936         STR(pac_file);
 937         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 938 #endif /* IEEE8021X_EAPOL */
 939         INT(mode);
 940         INT(proactive_key_caching);
 941         INT(disabled);
 942         INT(peerkey);
 943 #ifdef CONFIG_IEEE80211W
 944         INT(ieee80211w);
 945 #endif /* CONFIG_IEEE80211W */
 946         STR(id_str);
 947
 948 #undef STR
 949 #undef INT
 950 #undef INT_DEF
 951 }
 952
 953
 954 #ifndef CONFIG_NO_CONFIG_BLOBS
 955 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 956 {
 957         unsigned char *encoded;
 958
 959         encoded = base64_encode(blob->data, blob->len, NULL);
 960         if (encoded == NULL)
 961                 return -1;
 962
 963         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 964         os_free(encoded);
 965         return 0;
 966 }
 967 #endif /* CONFIG_NO_CONFIG_BLOBS */
 968
 969
 970 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 971 {
 972 #ifdef CONFIG_CTRL_IFACE
 973         if (config->ctrl_interface)
 974                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 975         if (config->ctrl_interface_group)
 976                 fprintf(f, "ctrl_interface_group=%s\n",
 977                         config->ctrl_interface_group);
 978 #endif /* CONFIG_CTRL_IFACE */
 979         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 980                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 981         if (config->ap_scan != DEFAULT_AP_SCAN)
 982                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 983         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 984                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 985 #ifdef EAP_TLS_OPENSSL
 986         if (config->opensc_engine_path)
 987                 fprintf(f, "opensc_engine_path=%s\n",
 988                         config->opensc_engine_path);
 989         if (config->pkcs11_engine_path)
 990                 fprintf(f, "pkcs11_engine_path=%s\n",
 991                         config->pkcs11_engine_path);
 992         if (config->pkcs11_module_path)
 993                 fprintf(f, "pkcs11_module_path=%s\n",
 994                         config->pkcs11_module_path);
 995 #endif /* EAP_TLS_OPENSSL */
 996         if (config->driver_param)
 997                 fprintf(f, "driver_param=%s\n", config->driver_param);
 998         if (config->dot11RSNAConfigPMKLifetime)
 999                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
1000                         config->dot11RSNAConfigPMKLifetime);
1001         if (config->dot11RSNAConfigPMKReauthThreshold)
1002                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
1003                         config->dot11RSNAConfigPMKReauthThreshold);
1004         if (config->dot11RSNAConfigSATimeout)
1005                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
1006                         config->dot11RSNAConfigSATimeout);
1007         if (config->update_config)
1008                 fprintf(f, "update_config=%d\n", config->update_config);
1009 #ifdef CONFIG_WPS
1010         if (is_nil_uuid(config->uuid)) {
1011                 char buf[40];
1012                 uuid_bin2str(config->uuid, buf, sizeof(buf));
1013                 fprintf(f, "uuid=%s\n", buf);
1014         }
1015         if (config->device_name)
1016                 fprintf(f, "device_name=%s\n", config->device_name);
1017         if (config->manufacturer)
1018                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
1019         if (config->model_name)
1020                 fprintf(f, "model_name=%s\n", config->model_name);
1021         if (config->model_number)
1022                 fprintf(f, "model_number=%s\n", config->model_number);
1023         if (config->serial_number)
1024                 fprintf(f, "serial_number=%s\n", config->serial_number);
1025         if (config->device_type)
1026                 fprintf(f, "device_type=%s\n", config->device_type);
1027         if (config->os_version)
1028                 fprintf(f, "os_version=%08x\n",
1029                         WPA_GET_BE32(config->os_version));
1030 #endif /* CONFIG_WPS */
1031         if (config->country[0] && config->country[1]) {
1032                 fprintf(f, "country=%c%c\n",
1033                         config->country[0], config->country[1]);
1034         }
1035 }
1036
1037 #endif /* CONFIG_NO_CONFIG_WRITE */
1038
1039
1040 int wpa_config_write(const char *name, struct wpa_config *config)
1041 {
1042 #ifndef CONFIG_NO_CONFIG_WRITE
1043         FILE *f;
1044         struct wpa_ssid *ssid;
1045 #ifndef CONFIG_NO_CONFIG_BLOBS
1046         struct wpa_config_blob *blob;
1047 #endif /* CONFIG_NO_CONFIG_BLOBS */
1048         int ret = 0;
1049
1050         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1051
1052         f = fopen(name, "w");
1053         if (f == NULL) {
1054                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1055                 return -1;
1056         }
1057
1058         wpa_config_write_global(f, config);
1059
1060         for (ssid = config->ssid; ssid; ssid = ssid->next) {
1061                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS)
1062                         continue; /* do not save temporary WPS networks */
1063                 fprintf(f, "\nnetwork={\n");
1064                 wpa_config_write_network(f, ssid);
1065                 fprintf(f, "}\n");
1066         }
1067
1068 #ifndef CONFIG_NO_CONFIG_BLOBS
1069         for (blob = config->blobs; blob; blob = blob->next) {
1070                 ret = wpa_config_write_blob(f, blob);
1071                 if (ret)
1072                         break;
1073         }
1074 #endif /* CONFIG_NO_CONFIG_BLOBS */
1075
1076         fclose(f);
1077
1078         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1079                    name, ret ? "un" : "");
1080         return ret;
1081 #else /* CONFIG_NO_CONFIG_WRITE */
1082         return -1;
1083 #endif /* CONFIG_NO_CONFIG_WRITE */
1084 }