contrib/wpa/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         void *param1, *param2, *param3;
 278 };
 279
 280
 281 static int wpa_config_parse_int(const struct global_parse_data *data,
 282                                 struct wpa_config *config, int line,
 283                                 const char *pos)
 284 {
 285         int *dst;
 286         dst = (int *) (((u8 *) config) + (long) data->param1);
 287         *dst = atoi(pos);
 288         wpa_printf(MSG_DEBUG, "%s=%d", data->name, *dst);
 289
 290         if (data->param2 && *dst < (long) data->param2) {
 291                 wpa_printf(MSG_ERROR, "Line %d: too small %s (value=%d "
 292                            "min_value=%ld)", line, data->name, *dst,
 293                            (long) data->param2);
 294                 *dst = (long) data->param2;
 295                 return -1;
 296         }
 297
 298         if (data->param3 && *dst > (long) data->param3) {
 299                 wpa_printf(MSG_ERROR, "Line %d: too large %s (value=%d "
 300                            "max_value=%ld)", line, data->name, *dst,
 301                            (long) data->param3);
 302                 *dst = (long) data->param3;
 303                 return -1;
 304         }
 305
 306         return 0;
 307 }
 308
 309
 310 static int wpa_config_parse_str(const struct global_parse_data *data,
 311                                 struct wpa_config *config, int line,
 312                                 const char *pos)
 313 {
 314         size_t len;
 315         char **dst, *tmp;
 316
 317         len = os_strlen(pos);
 318         if (data->param2 && len < (size_t) data->param2) {
 319                 wpa_printf(MSG_ERROR, "Line %d: too short %s (len=%lu "
 320                            "min_len=%ld)", line, data->name,
 321                            (unsigned long) len, (long) data->param2);
 322                 return -1;
 323         }
 324
 325         if (data->param3 && len > (size_t) data->param3) {
 326                 wpa_printf(MSG_ERROR, "Line %d: too long %s (len=%lu "
 327                            "max_len=%ld)", line, data->name,
 328                            (unsigned long) len, (long) data->param3);
 329                 return -1;
 330         }
 331
 332         tmp = os_strdup(pos);
 333         if (tmp == NULL)
 334                 return -1;
 335
 336         dst = (char **) (((u8 *) config) + (long) data->param1);
 337         os_free(*dst);
 338         *dst = tmp;
 339         wpa_printf(MSG_DEBUG, "%s='%s'", data->name, *dst);
 340
 341         return 0;
 342 }
 343
 344
 345 static int wpa_config_process_country(const struct global_parse_data *data,
 346                                       struct wpa_config *config, int line,
 347                                       const char *pos)
 348 {
 349         if (!pos[0] || !pos[1]) {
 350                 wpa_printf(MSG_DEBUG, "Invalid country set");
 351                 return -1;
 352         }
 353         config->country[0] = pos[0];
 354         config->country[1] = pos[1];
 355         wpa_printf(MSG_DEBUG, "country='%c%c'",
 356                    config->country[0], config->country[1]);
 357         return 0;
 358 }
 359
 360
 361 static int wpa_config_process_load_dynamic_eap(
 362         const struct global_parse_data *data, struct wpa_config *config,
 363         int line, const char *so)
 364 {
 365         int ret;
 366         wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
 367         ret = eap_peer_method_load(so);
 368         if (ret == -2) {
 369                 wpa_printf(MSG_DEBUG, "This EAP type was already loaded - not "
 370                            "reloading.");
 371         } else if (ret) {
 372                 wpa_printf(MSG_ERROR, "Line %d: Failed to load dynamic EAP "
 373                            "method '%s'.", line, so);
 374                 return -1;
 375         }
 376
 377         return 0;
 378 }
 379
 380
 381 #ifdef CONFIG_WPS
 382
 383 static int wpa_config_process_uuid(const struct global_parse_data *data,
 384                                    struct wpa_config *config, int line,
 385                                    const char *pos)
 386 {
 387         char buf[40];
 388         if (uuid_str2bin(pos, config->uuid)) {
 389                 wpa_printf(MSG_ERROR, "Line %d: invalid UUID", line);
 390                 return -1;
 391         }
 392         uuid_bin2str(config->uuid, buf, sizeof(buf));
 393         wpa_printf(MSG_DEBUG, "uuid=%s", buf);
 394         return 0;
 395 }
 396
 397
 398 static int wpa_config_process_os_version(const struct global_parse_data *data,
 399                                          struct wpa_config *config, int line,
 400                                          const char *pos)
 401 {
 402         if (hexstr2bin(pos, config->os_version, 4)) {
 403                 wpa_printf(MSG_ERROR, "Line %d: invalid os_version", line);
 404                 return -1;
 405         }
 406         wpa_printf(MSG_DEBUG, "os_version=%08x",
 407                    WPA_GET_BE32(config->os_version));
 408         return 0;
 409 }
 410
 411 #endif /* CONFIG_WPS */
 412
 413
 414 #ifdef OFFSET
 415 #undef OFFSET
 416 #endif /* OFFSET */
 417 /* OFFSET: Get offset of a variable within the wpa_config structure */
 418 #define OFFSET(v) ((void *) &((struct wpa_config *) 0)->v)
 419
 420 #define FUNC(f) #f, wpa_config_process_ ## f, OFFSET(f), NULL, NULL
 421 #define FUNC_NO_VAR(f) #f, wpa_config_process_ ## f, NULL, NULL, NULL
 422 #define _INT(f) #f, wpa_config_parse_int, OFFSET(f)
 423 #define INT(f) _INT(f), NULL, NULL
 424 #define INT_RANGE(f, min, max) _INT(f), (void *) min, (void *) max
 425 #define _STR(f) #f, wpa_config_parse_str, OFFSET(f)
 426 #define STR(f) _STR(f), NULL, NULL
 427 #define STR_RANGE(f, min, max) _STR(f), (void *) min, (void *) max
 428
 429 static const struct global_parse_data global_fields[] = {
 430 #ifdef CONFIG_CTRL_IFACE
 431         { STR(ctrl_interface) },
 432         { STR(ctrl_interface_group) } /* deprecated */,
 433 #endif /* CONFIG_CTRL_IFACE */
 434         { INT_RANGE(eapol_version, 1, 2) },
 435         { INT(ap_scan) },
 436         { INT(fast_reauth) },
 437         { STR(opensc_engine_path) },
 438         { STR(pkcs11_engine_path) },
 439         { STR(pkcs11_module_path) },
 440         { STR(driver_param) },
 441         { INT(dot11RSNAConfigPMKLifetime) },
 442         { INT(dot11RSNAConfigPMKReauthThreshold) },
 443         { INT(dot11RSNAConfigSATimeout) },
 444 #ifndef CONFIG_NO_CONFIG_WRITE
 445         { INT(update_config) },
 446 #endif /* CONFIG_NO_CONFIG_WRITE */
 447         { FUNC_NO_VAR(load_dynamic_eap) },
 448 #ifdef CONFIG_WPS
 449         { FUNC(uuid) },
 450         { STR_RANGE(device_name, 0, 32) },
 451         { STR_RANGE(manufacturer, 0, 64) },
 452         { STR_RANGE(model_name, 0, 32) },
 453         { STR_RANGE(model_number, 0, 32) },
 454         { STR_RANGE(serial_number, 0, 32) },
 455         { STR(device_type) },
 456         { FUNC(os_version) },
 457         { STR(config_methods) },
 458         { INT_RANGE(wps_cred_processing, 0, 2) },
 459 #endif /* CONFIG_WPS */
 460         { FUNC(country) },
 461         { INT(bss_max_count) },
 462         { INT_RANGE(filter_ssids, 0, 1) }
 463 };
 464
 465 #undef FUNC
 466 #undef _INT
 467 #undef INT
 468 #undef INT_RANGE
 469 #undef _STR
 470 #undef STR
 471 #undef STR_RANGE
 472 #define NUM_GLOBAL_FIELDS (sizeof(global_fields) / sizeof(global_fields[0]))
 473
 474
 475 static int wpa_config_process_global(struct wpa_config *config, char *pos,
 476                                      int line)
 477 {
 478         size_t i;
 479         int ret = 0;
 480
 481         for (i = 0; i < NUM_GLOBAL_FIELDS; i++) {
 482                 const struct global_parse_data *field = &global_fields[i];
 483                 size_t flen = os_strlen(field->name);
 484                 if (os_strncmp(pos, field->name, flen) != 0 ||
 485                     pos[flen] != '=')
 486                         continue;
 487
 488                 if (field->parser(field, config, line, pos + flen + 1)) {
 489                         wpa_printf(MSG_ERROR, "Line %d: failed to "
 490                                    "parse '%s'.", line, pos);
 491                         ret = -1;
 492                 }
 493                 break;
 494         }
 495         if (i == NUM_GLOBAL_FIELDS) {
 496                 wpa_printf(MSG_ERROR, "Line %d: unknown global field '%s'.",
 497                            line, pos);
 498                 ret = -1;
 499         }
 500
 501         return ret;
 502 }
 503
 504
 505 struct wpa_config * wpa_config_read(const char *name)
 506 {
 507         FILE *f;
 508         char buf[256], *pos;
 509         int errors = 0, line = 0;
 510         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 511         struct wpa_config *config;
 512         int id = 0;
 513
 514         config = wpa_config_alloc_empty(NULL, NULL);
 515         if (config == NULL)
 516                 return NULL;
 517         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 518         f = fopen(name, "r");
 519         if (f == NULL) {
 520                 os_free(config);
 521                 return NULL;
 522         }
 523
 524         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 525                 if (os_strcmp(pos, "network={") == 0) {
 526                         ssid = wpa_config_read_network(f, &line, id++);
 527                         if (ssid == NULL) {
 528                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 529                                            "parse network block.", line);
 530                                 errors++;
 531                                 continue;
 532                         }
 533                         if (head == NULL) {
 534                                 head = tail = ssid;
 535                         } else {
 536                                 tail->next = ssid;
 537                                 tail = ssid;
 538                         }
 539                         if (wpa_config_add_prio_network(config, ssid)) {
 540                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 541                                            "network block to priority list.",
 542                                            line);
 543                                 errors++;
 544                                 continue;
 545                         }
 546 #ifndef CONFIG_NO_CONFIG_BLOBS
 547                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 548                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 549                             < 0) {
 550                                 errors++;
 551                                 continue;
 552                         }
 553 #endif /* CONFIG_NO_CONFIG_BLOBS */
 554                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 555                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 556                                    "line '%s'.", line, pos);
 557                         errors++;
 558                         continue;
 559                 }
 560         }
 561
 562         fclose(f);
 563
 564         config->ssid = head;
 565         wpa_config_debug_dump_networks(config);
 566
 567         if (errors) {
 568                 wpa_config_free(config);
 569                 config = NULL;
 570                 head = NULL;
 571         }
 572
 573         return config;
 574 }
 575
 576
 577 #ifndef CONFIG_NO_CONFIG_WRITE
 578
 579 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 580 {
 581         char *value = wpa_config_get(ssid, field);
 582         if (value == NULL)
 583                 return;
 584         fprintf(f, "\t%s=%s\n", field, value);
 585         os_free(value);
 586 }
 587
 588
 589 static void write_int(FILE *f, const char *field, int value, int def)
 590 {
 591         if (value == def)
 592                 return;
 593         fprintf(f, "\t%s=%d\n", field, value);
 594 }
 595
 596
 597 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 598 {
 599         char *value = wpa_config_get(ssid, "bssid");
 600         if (value == NULL)
 601                 return;
 602         fprintf(f, "\tbssid=%s\n", value);
 603         os_free(value);
 604 }
 605
 606
 607 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 608 {
 609         char *value = wpa_config_get(ssid, "psk");
 610         if (value == NULL)
 611                 return;
 612         fprintf(f, "\tpsk=%s\n", value);
 613         os_free(value);
 614 }
 615
 616
 617 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 618 {
 619         char *value;
 620
 621         if (ssid->proto == DEFAULT_PROTO)
 622                 return;
 623
 624         value = wpa_config_get(ssid, "proto");
 625         if (value == NULL)
 626                 return;
 627         if (value[0])
 628                 fprintf(f, "\tproto=%s\n", value);
 629         os_free(value);
 630 }
 631
 632
 633 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 634 {
 635         char *value;
 636
 637         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 638                 return;
 639
 640         value = wpa_config_get(ssid, "key_mgmt");
 641         if (value == NULL)
 642                 return;
 643         if (value[0])
 644                 fprintf(f, "\tkey_mgmt=%s\n", value);
 645         os_free(value);
 646 }
 647
 648
 649 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 650 {
 651         char *value;
 652
 653         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 654                 return;
 655
 656         value = wpa_config_get(ssid, "pairwise");
 657         if (value == NULL)
 658                 return;
 659         if (value[0])
 660                 fprintf(f, "\tpairwise=%s\n", value);
 661         os_free(value);
 662 }
 663
 664
 665 static void write_group(FILE *f, struct wpa_ssid *ssid)
 666 {
 667         char *value;
 668
 669         if (ssid->group_cipher == DEFAULT_GROUP)
 670                 return;
 671
 672         value = wpa_config_get(ssid, "group");
 673         if (value == NULL)
 674                 return;
 675         if (value[0])
 676                 fprintf(f, "\tgroup=%s\n", value);
 677         os_free(value);
 678 }
 679
 680
 681 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 682 {
 683         char *value;
 684
 685         if (ssid->auth_alg == 0)
 686                 return;
 687
 688         value = wpa_config_get(ssid, "auth_alg");
 689         if (value == NULL)
 690                 return;
 691         if (value[0])
 692                 fprintf(f, "\tauth_alg=%s\n", value);
 693         os_free(value);
 694 }
 695
 696
 697 #ifdef IEEE8021X_EAPOL
 698 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 699 {
 700         char *value;
 701
 702         value = wpa_config_get(ssid, "eap");
 703         if (value == NULL)
 704                 return;
 705
 706         if (value[0])
 707                 fprintf(f, "\teap=%s\n", value);
 708         os_free(value);
 709 }
 710 #endif /* IEEE8021X_EAPOL */
 711
 712
 713 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 714 {
 715         char field[20], *value;
 716         int res;
 717
 718         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 719         if (res < 0 || (size_t) res >= sizeof(field))
 720                 return;
 721         value = wpa_config_get(ssid, field);
 722         if (value) {
 723                 fprintf(f, "\t%s=%s\n", field, value);
 724                 os_free(value);
 725         }
 726 }
 727
 728
 729 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 730 {
 731         int i;
 732
 733 #define STR(t) write_str(f, #t, ssid)
 734 #define INT(t) write_int(f, #t, ssid->t, 0)
 735 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 736 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 737 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 738
 739         STR(ssid);
 740         INT(scan_ssid);
 741         write_bssid(f, ssid);
 742         write_psk(f, ssid);
 743         write_proto(f, ssid);
 744         write_key_mgmt(f, ssid);
 745         write_pairwise(f, ssid);
 746         write_group(f, ssid);
 747         write_auth_alg(f, ssid);
 748 #ifdef IEEE8021X_EAPOL
 749         write_eap(f, ssid);
 750         STR(identity);
 751         STR(anonymous_identity);
 752         STR(password);
 753         STR(ca_cert);
 754         STR(ca_path);
 755         STR(client_cert);
 756         STR(private_key);
 757         STR(private_key_passwd);
 758         STR(dh_file);
 759         STR(subject_match);
 760         STR(altsubject_match);
 761         STR(ca_cert2);
 762         STR(ca_path2);
 763         STR(client_cert2);
 764         STR(private_key2);
 765         STR(private_key2_passwd);
 766         STR(dh_file2);
 767         STR(subject_match2);
 768         STR(altsubject_match2);
 769         STR(phase1);
 770         STR(phase2);
 771         STR(pcsc);
 772         STR(pin);
 773         STR(engine_id);
 774         STR(key_id);
 775         STR(cert_id);
 776         STR(ca_cert_id);
 777         STR(key2_id);
 778         STR(pin2);
 779         STR(engine2_id);
 780         STR(cert2_id);
 781         STR(ca_cert2_id);
 782         INTe(engine);
 783         INTe(engine2);
 784         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 785 #endif /* IEEE8021X_EAPOL */
 786         for (i = 0; i < 4; i++)
 787                 write_wep_key(f, i, ssid);
 788         INT(wep_tx_keyidx);
 789         INT(priority);
 790 #ifdef IEEE8021X_EAPOL
 791         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 792         STR(pac_file);
 793         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 794 #endif /* IEEE8021X_EAPOL */
 795         INT(mode);
 796         INT(proactive_key_caching);
 797         INT(disabled);
 798         INT(peerkey);
 799 #ifdef CONFIG_IEEE80211W
 800         INT(ieee80211w);
 801 #endif /* CONFIG_IEEE80211W */
 802         STR(id_str);
 803
 804 #undef STR
 805 #undef INT
 806 #undef INT_DEF
 807 }
 808
 809
 810 #ifndef CONFIG_NO_CONFIG_BLOBS
 811 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 812 {
 813         unsigned char *encoded;
 814
 815         encoded = base64_encode(blob->data, blob->len, NULL);
 816         if (encoded == NULL)
 817                 return -1;
 818
 819         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 820         os_free(encoded);
 821         return 0;
 822 }
 823 #endif /* CONFIG_NO_CONFIG_BLOBS */
 824
 825
 826 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 827 {
 828 #ifdef CONFIG_CTRL_IFACE
 829         if (config->ctrl_interface)
 830                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 831         if (config->ctrl_interface_group)
 832                 fprintf(f, "ctrl_interface_group=%s\n",
 833                         config->ctrl_interface_group);
 834 #endif /* CONFIG_CTRL_IFACE */
 835         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 836                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 837         if (config->ap_scan != DEFAULT_AP_SCAN)
 838                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 839         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 840                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 841         if (config->opensc_engine_path)
 842                 fprintf(f, "opensc_engine_path=%s\n",
 843                         config->opensc_engine_path);
 844         if (config->pkcs11_engine_path)
 845                 fprintf(f, "pkcs11_engine_path=%s\n",
 846                         config->pkcs11_engine_path);
 847         if (config->pkcs11_module_path)
 848                 fprintf(f, "pkcs11_module_path=%s\n",
 849                         config->pkcs11_module_path);
 850         if (config->driver_param)
 851                 fprintf(f, "driver_param=%s\n", config->driver_param);
 852         if (config->dot11RSNAConfigPMKLifetime)
 853                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 854                         config->dot11RSNAConfigPMKLifetime);
 855         if (config->dot11RSNAConfigPMKReauthThreshold)
 856                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 857                         config->dot11RSNAConfigPMKReauthThreshold);
 858         if (config->dot11RSNAConfigSATimeout)
 859                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 860                         config->dot11RSNAConfigSATimeout);
 861         if (config->update_config)
 862                 fprintf(f, "update_config=%d\n", config->update_config);
 863 #ifdef CONFIG_WPS
 864         if (!is_nil_uuid(config->uuid)) {
 865                 char buf[40];
 866                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 867                 fprintf(f, "uuid=%s\n", buf);
 868         }
 869         if (config->device_name)
 870                 fprintf(f, "device_name=%s\n", config->device_name);
 871         if (config->manufacturer)
 872                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 873         if (config->model_name)
 874                 fprintf(f, "model_name=%s\n", config->model_name);
 875         if (config->model_number)
 876                 fprintf(f, "model_number=%s\n", config->model_number);
 877         if (config->serial_number)
 878                 fprintf(f, "serial_number=%s\n", config->serial_number);
 879         if (config->device_type)
 880                 fprintf(f, "device_type=%s\n", config->device_type);
 881         if (WPA_GET_BE32(config->os_version))
 882                 fprintf(f, "os_version=%08x\n",
 883                         WPA_GET_BE32(config->os_version));
 884         if (config->config_methods)
 885                 fprintf(f, "config_methods=%s\n", config->config_methods);
 886         if (config->wps_cred_processing)
 887                 fprintf(f, "wps_cred_processing=%d\n",
 888                         config->wps_cred_processing);
 889 #endif /* CONFIG_WPS */
 890         if (config->country[0] && config->country[1]) {
 891                 fprintf(f, "country=%c%c\n",
 892                         config->country[0], config->country[1]);
 893         }
 894         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 895                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 896         if (config->filter_ssids)
 897                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 898 }
 899
 900 #endif /* CONFIG_NO_CONFIG_WRITE */
 901
 902
 903 int wpa_config_write(const char *name, struct wpa_config *config)
 904 {
 905 #ifndef CONFIG_NO_CONFIG_WRITE
 906         FILE *f;
 907         struct wpa_ssid *ssid;
 908 #ifndef CONFIG_NO_CONFIG_BLOBS
 909         struct wpa_config_blob *blob;
 910 #endif /* CONFIG_NO_CONFIG_BLOBS */
 911         int ret = 0;
 912
 913         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 914
 915         f = fopen(name, "w");
 916         if (f == NULL) {
 917                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 918                 return -1;
 919         }
 920
 921         wpa_config_write_global(f, config);
 922
 923         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 924                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS)
 925                         continue; /* do not save temporary WPS networks */
 926                 fprintf(f, "\nnetwork={\n");
 927                 wpa_config_write_network(f, ssid);
 928                 fprintf(f, "}\n");
 929         }
 930
 931 #ifndef CONFIG_NO_CONFIG_BLOBS
 932         for (blob = config->blobs; blob; blob = blob->next) {
 933                 ret = wpa_config_write_blob(f, blob);
 934                 if (ret)
 935                         break;
 936         }
 937 #endif /* CONFIG_NO_CONFIG_BLOBS */
 938
 939         fclose(f);
 940
 941         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
 942                    name, ret ? "un" : "");
 943         return ret;
 944 #else /* CONFIG_NO_CONFIG_WRITE */
 945         return -1;
 946 #endif /* CONFIG_NO_CONFIG_WRITE */
 947 }