wpa_supplicant/config_file.c

   1 /*
   2  * WPA Supplicant / Configuration backend: text file
   3  * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  *
   8  * This file implements a configuration backend for text files. All the
   9  * configuration information is stored in a text file that uses a format
  10  * described in the sample configuration file, wpa_supplicant.conf.
  11  */
  12
  13 #include "includes.h"
  14
  15 #include "common.h"
  16 #include "config.h"
  17 #include "base64.h"
  18 #include "uuid.h"
  19 #include "p2p/p2p.h"
  20 #include "eap_peer/eap_methods.h"
  21 #include "eap_peer/eap.h"
  22
  23
  24 static int newline_terminated(const char *buf, size_t buflen)
  25 {
  26         size_t len = os_strlen(buf);
  27         if (len == 0)
  28                 return 0;
  29         if (len == buflen - 1 && buf[buflen - 1] != '\r' &&
  30             buf[len - 1] != '\n')
  31                 return 0;
  32         return 1;
  33 }
  34
  35
  36 static void skip_line_end(FILE *stream)
  37 {
  38         char buf[100];
  39         while (fgets(buf, sizeof(buf), stream)) {
  40                 buf[sizeof(buf) - 1] = '\0';
  41                 if (newline_terminated(buf, sizeof(buf)))
  42                         return;
  43         }
  44 }
  45
  46
  47 /**
  48  * wpa_config_get_line - Read the next configuration file line
  49  * @s: Buffer for the line
  50  * @size: The buffer length
  51  * @stream: File stream to read from
  52  * @line: Pointer to a variable storing the file line number
  53  * @_pos: Buffer for the pointer to the beginning of data on the text line or
  54  * %NULL if not needed (returned value used instead)
  55  * Returns: Pointer to the beginning of data on the text line or %NULL if no
  56  * more text lines are available.
  57  *
  58  * This function reads the next non-empty line from the configuration file and
  59  * removes comments. The returned string is guaranteed to be null-terminated.
  60  */
  61 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
  62                                   char **_pos)
  63 {
  64         char *pos, *end, *sstart;
  65
  66         while (fgets(s, size, stream)) {
  67                 (*line)++;
  68                 s[size - 1] = '\0';
  69                 if (!newline_terminated(s, size)) {
  70                         /*
  71                          * The line was truncated - skip rest of it to avoid
  72                          * confusing error messages.
  73                          */
  74                         wpa_printf(MSG_INFO, "Long line in configuration file "
  75                                    "truncated");
  76                         skip_line_end(stream);
  77                 }
  78                 pos = s;
  79
  80                 /* Skip white space from the beginning of line. */
  81                 while (*pos == ' ' || *pos == '\t' || *pos == '\r')
  82                         pos++;
  83
  84                 /* Skip comment lines and empty lines */
  85                 if (*pos == '#' || *pos == '\n' || *pos == '\0')
  86                         continue;
  87
  88                 /*
  89                  * Remove # comments unless they are within a double quoted
  90                  * string.
  91                  */
  92                 sstart = os_strchr(pos, '"');
  93                 if (sstart)
  94                         sstart = os_strrchr(sstart + 1, '"');
  95                 if (!sstart)
  96                         sstart = pos;
  97                 end = os_strchr(sstart, '#');
  98                 if (end)
  99                         *end-- = '\0';
 100                 else
 101                         end = pos + os_strlen(pos) - 1;
 102
 103                 /* Remove trailing white space. */
 104                 while (end > pos &&
 105                        (*end == '\n' || *end == ' ' || *end == '\t' ||
 106                         *end == '\r'))
 107                         *end-- = '\0';
 108
 109                 if (*pos == '\0')
 110                         continue;
 111
 112                 if (_pos)
 113                         *_pos = pos;
 114                 return pos;
 115         }
 116
 117         if (_pos)
 118                 *_pos = NULL;
 119         return NULL;
 120 }
 121
 122
 123 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
 124 {
 125         int errors = 0;
 126
 127         if (ssid->passphrase) {
 128                 if (ssid->psk_set) {
 129                         wpa_printf(MSG_ERROR, "Line %d: both PSK and "
 130                                    "passphrase configured.", line);
 131                         errors++;
 132                 }
 133                 wpa_config_update_psk(ssid);
 134         }
 135
 136         if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
 137             !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 138             !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
 139                 /* Group cipher cannot be stronger than the pairwise cipher. */
 140                 wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
 141                            " list since it was not allowed for pairwise "
 142                            "cipher", line);
 143                 ssid->group_cipher &= ~WPA_CIPHER_CCMP;
 144         }
 145
 146         return errors;
 147 }
 148
 149
 150 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
 151 {
 152         struct wpa_ssid *ssid;
 153         int errors = 0, end = 0;
 154         char buf[2000], *pos, *pos2;
 155
 156         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
 157                    *line);
 158         ssid = os_zalloc(sizeof(*ssid));
 159         if (ssid == NULL)
 160                 return NULL;
 161         dl_list_init(&ssid->psk_list);
 162         ssid->id = id;
 163
 164         wpa_config_set_network_defaults(ssid);
 165
 166         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 167                 if (os_strcmp(pos, "}") == 0) {
 168                         end = 1;
 169                         break;
 170                 }
 171
 172                 pos2 = os_strchr(pos, '=');
 173                 if (pos2 == NULL) {
 174                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 175                                    "'%s'.", *line, pos);
 176                         errors++;
 177                         continue;
 178                 }
 179
 180                 *pos2++ = '\0';
 181                 if (*pos2 == '"') {
 182                         if (os_strchr(pos2 + 1, '"') == NULL) {
 183                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 184                                            "quotation '%s'.", *line, pos2);
 185                                 errors++;
 186                                 continue;
 187                         }
 188                 }
 189
 190                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 191                         errors++;
 192         }
 193
 194         if (!end) {
 195                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 196                            "terminated properly.", *line);
 197                 errors++;
 198         }
 199
 200         errors += wpa_config_validate_network(ssid, *line);
 201
 202         if (errors) {
 203                 wpa_config_free_ssid(ssid);
 204                 ssid = NULL;
 205         }
 206
 207         return ssid;
 208 }
 209
 210
 211 static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 212 {
 213         struct wpa_cred *cred;
 214         int errors = 0, end = 0;
 215         char buf[256], *pos, *pos2;
 216
 217         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
 218         cred = os_zalloc(sizeof(*cred));
 219         if (cred == NULL)
 220                 return NULL;
 221         cred->id = id;
 222         cred->sim_num = DEFAULT_USER_SELECTED_SIM;
 223
 224         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 225                 if (os_strcmp(pos, "}") == 0) {
 226                         end = 1;
 227                         break;
 228                 }
 229
 230                 pos2 = os_strchr(pos, '=');
 231                 if (pos2 == NULL) {
 232                         wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
 233                                    "'%s'.", *line, pos);
 234                         errors++;
 235                         continue;
 236                 }
 237
 238                 *pos2++ = '\0';
 239                 if (*pos2 == '"') {
 240                         if (os_strchr(pos2 + 1, '"') == NULL) {
 241                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 242                                            "quotation '%s'.", *line, pos2);
 243                                 errors++;
 244                                 continue;
 245                         }
 246                 }
 247
 248                 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
 249                         errors++;
 250         }
 251
 252         if (!end) {
 253                 wpa_printf(MSG_ERROR, "Line %d: cred block was not "
 254                            "terminated properly.", *line);
 255                 errors++;
 256         }
 257
 258         if (errors) {
 259                 wpa_config_free_cred(cred);
 260                 cred = NULL;
 261         }
 262
 263         return cred;
 264 }
 265
 266
 267 #ifndef CONFIG_NO_CONFIG_BLOBS
 268 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 269                                                      const char *name)
 270 {
 271         struct wpa_config_blob *blob;
 272         char buf[256], *pos;
 273         unsigned char *encoded = NULL, *nencoded;
 274         int end = 0;
 275         size_t encoded_len = 0, len;
 276
 277         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 278                    *line, name);
 279
 280         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 281                 if (os_strcmp(pos, "}") == 0) {
 282                         end = 1;
 283                         break;
 284                 }
 285
 286                 len = os_strlen(pos);
 287                 nencoded = os_realloc(encoded, encoded_len + len);
 288                 if (nencoded == NULL) {
 289                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 290                                    "blob", *line);
 291                         os_free(encoded);
 292                         return NULL;
 293                 }
 294                 encoded = nencoded;
 295                 os_memcpy(encoded + encoded_len, pos, len);
 296                 encoded_len += len;
 297         }
 298
 299         if (!end) {
 300                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 301                            "properly", *line);
 302                 os_free(encoded);
 303                 return NULL;
 304         }
 305
 306         blob = os_zalloc(sizeof(*blob));
 307         if (blob == NULL) {
 308                 os_free(encoded);
 309                 return NULL;
 310         }
 311         blob->name = os_strdup(name);
 312         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 313         os_free(encoded);
 314
 315         if (blob->name == NULL || blob->data == NULL) {
 316                 wpa_config_free_blob(blob);
 317                 return NULL;
 318         }
 319
 320         return blob;
 321 }
 322
 323
 324 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 325                                    int *line, char *bname)
 326 {
 327         char *name_end;
 328         struct wpa_config_blob *blob;
 329
 330         name_end = os_strchr(bname, '=');
 331         if (name_end == NULL) {
 332                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 333                            *line);
 334                 return -1;
 335         }
 336         *name_end = '\0';
 337
 338         blob = wpa_config_read_blob(f, line, bname);
 339         if (blob == NULL) {
 340                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 341                            *line, bname);
 342                 return -1;
 343         }
 344         wpa_config_set_blob(config, blob);
 345         return 0;
 346 }
 347 #endif /* CONFIG_NO_CONFIG_BLOBS */
 348
 349
 350 struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp)
 351 {
 352         FILE *f;
 353         char buf[512], *pos;
 354         int errors = 0, line = 0;
 355         struct wpa_ssid *ssid, *tail, *head;
 356         struct wpa_cred *cred, *cred_tail, *cred_head;
 357         struct wpa_config *config;
 358         int id = 0;
 359         int cred_id = 0;
 360
 361         if (name == NULL)
 362                 return NULL;
 363         if (cfgp)
 364                 config = cfgp;
 365         else
 366                 config = wpa_config_alloc_empty(NULL, NULL);
 367         if (config == NULL) {
 368                 wpa_printf(MSG_ERROR, "Failed to allocate config file "
 369                            "structure");
 370                 return NULL;
 371         }
 372         tail = head = config->ssid;
 373         while (tail && tail->next)
 374                 tail = tail->next;
 375         cred_tail = cred_head = config->cred;
 376         while (cred_tail && cred_tail->next)
 377                 cred_tail = cred_tail->next;
 378
 379         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 380         f = fopen(name, "r");
 381         if (f == NULL) {
 382                 wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
 383                            "error: %s", name, strerror(errno));
 384                 os_free(config);
 385                 return NULL;
 386         }
 387
 388         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 389                 if (os_strcmp(pos, "network={") == 0) {
 390                         ssid = wpa_config_read_network(f, &line, id++);
 391                         if (ssid == NULL) {
 392                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 393                                            "parse network block.", line);
 394                                 errors++;
 395                                 continue;
 396                         }
 397                         if (head == NULL) {
 398                                 head = tail = ssid;
 399                         } else {
 400                                 tail->next = ssid;
 401                                 tail = ssid;
 402                         }
 403                         if (wpa_config_add_prio_network(config, ssid)) {
 404                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 405                                            "network block to priority list.",
 406                                            line);
 407                                 errors++;
 408                                 continue;
 409                         }
 410                 } else if (os_strcmp(pos, "cred={") == 0) {
 411                         cred = wpa_config_read_cred(f, &line, cred_id++);
 412                         if (cred == NULL) {
 413                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 414                                            "parse cred block.", line);
 415                                 errors++;
 416                                 continue;
 417                         }
 418                         if (cred_head == NULL) {
 419                                 cred_head = cred_tail = cred;
 420                         } else {
 421                                 cred_tail->next = cred;
 422                                 cred_tail = cred;
 423                         }
 424 #ifndef CONFIG_NO_CONFIG_BLOBS
 425                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 426                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 427                             < 0) {
 428                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 429                                            "process blob.", line);
 430                                 errors++;
 431                                 continue;
 432                         }
 433 #endif /* CONFIG_NO_CONFIG_BLOBS */
 434                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 435                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 436                                    "line '%s'.", line, pos);
 437                         errors++;
 438                         continue;
 439                 }
 440         }
 441
 442         fclose(f);
 443
 444         config->ssid = head;
 445         wpa_config_debug_dump_networks(config);
 446         config->cred = cred_head;
 447
 448 #ifndef WPA_IGNORE_CONFIG_ERRORS
 449         if (errors) {
 450                 wpa_config_free(config);
 451                 config = NULL;
 452                 head = NULL;
 453         }
 454 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 455
 456         return config;
 457 }
 458
 459
 460 #ifndef CONFIG_NO_CONFIG_WRITE
 461
 462 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 463 {
 464         char *value = wpa_config_get(ssid, field);
 465         if (value == NULL)
 466                 return;
 467         fprintf(f, "\t%s=%s\n", field, value);
 468         os_free(value);
 469 }
 470
 471
 472 static void write_int(FILE *f, const char *field, int value, int def)
 473 {
 474         if (value == def)
 475                 return;
 476         fprintf(f, "\t%s=%d\n", field, value);
 477 }
 478
 479
 480 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 481 {
 482         char *value = wpa_config_get(ssid, "bssid");
 483         if (value == NULL)
 484                 return;
 485         fprintf(f, "\tbssid=%s\n", value);
 486         os_free(value);
 487 }
 488
 489
 490 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 491 {
 492         char *value = wpa_config_get(ssid, "psk");
 493         if (value == NULL)
 494                 return;
 495         fprintf(f, "\tpsk=%s\n", value);
 496         os_free(value);
 497 }
 498
 499
 500 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 501 {
 502         char *value;
 503
 504         if (ssid->proto == DEFAULT_PROTO)
 505                 return;
 506
 507         value = wpa_config_get(ssid, "proto");
 508         if (value == NULL)
 509                 return;
 510         if (value[0])
 511                 fprintf(f, "\tproto=%s\n", value);
 512         os_free(value);
 513 }
 514
 515
 516 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 517 {
 518         char *value;
 519
 520         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 521                 return;
 522
 523         value = wpa_config_get(ssid, "key_mgmt");
 524         if (value == NULL)
 525                 return;
 526         if (value[0])
 527                 fprintf(f, "\tkey_mgmt=%s\n", value);
 528         os_free(value);
 529 }
 530
 531
 532 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 533 {
 534         char *value;
 535
 536         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 537                 return;
 538
 539         value = wpa_config_get(ssid, "pairwise");
 540         if (value == NULL)
 541                 return;
 542         if (value[0])
 543                 fprintf(f, "\tpairwise=%s\n", value);
 544         os_free(value);
 545 }
 546
 547
 548 static void write_group(FILE *f, struct wpa_ssid *ssid)
 549 {
 550         char *value;
 551
 552         if (ssid->group_cipher == DEFAULT_GROUP)
 553                 return;
 554
 555         value = wpa_config_get(ssid, "group");
 556         if (value == NULL)
 557                 return;
 558         if (value[0])
 559                 fprintf(f, "\tgroup=%s\n", value);
 560         os_free(value);
 561 }
 562
 563
 564 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 565 {
 566         char *value;
 567
 568         if (ssid->auth_alg == 0)
 569                 return;
 570
 571         value = wpa_config_get(ssid, "auth_alg");
 572         if (value == NULL)
 573                 return;
 574         if (value[0])
 575                 fprintf(f, "\tauth_alg=%s\n", value);
 576         os_free(value);
 577 }
 578
 579
 580 #ifdef IEEE8021X_EAPOL
 581 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 582 {
 583         char *value;
 584
 585         value = wpa_config_get(ssid, "eap");
 586         if (value == NULL)
 587                 return;
 588
 589         if (value[0])
 590                 fprintf(f, "\teap=%s\n", value);
 591         os_free(value);
 592 }
 593 #endif /* IEEE8021X_EAPOL */
 594
 595
 596 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 597 {
 598         char field[20], *value;
 599         int res;
 600
 601         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 602         if (res < 0 || (size_t) res >= sizeof(field))
 603                 return;
 604         value = wpa_config_get(ssid, field);
 605         if (value) {
 606                 fprintf(f, "\t%s=%s\n", field, value);
 607                 os_free(value);
 608         }
 609 }
 610
 611
 612 #ifdef CONFIG_P2P
 613
 614 static void write_go_p2p_dev_addr(FILE *f, struct wpa_ssid *ssid)
 615 {
 616         char *value = wpa_config_get(ssid, "go_p2p_dev_addr");
 617         if (value == NULL)
 618                 return;
 619         fprintf(f, "\tgo_p2p_dev_addr=%s\n", value);
 620         os_free(value);
 621 }
 622
 623 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 624 {
 625         char *value = wpa_config_get(ssid, "p2p_client_list");
 626         if (value == NULL)
 627                 return;
 628         fprintf(f, "\tp2p_client_list=%s\n", value);
 629         os_free(value);
 630 }
 631
 632
 633 static void write_psk_list(FILE *f, struct wpa_ssid *ssid)
 634 {
 635         struct psk_list_entry *psk;
 636         char hex[32 * 2 + 1];
 637
 638         dl_list_for_each(psk, &ssid->psk_list, struct psk_list_entry, list) {
 639                 wpa_snprintf_hex(hex, sizeof(hex), psk->psk, sizeof(psk->psk));
 640                 fprintf(f, "\tpsk_list=%s" MACSTR "-%s\n",
 641                         psk->p2p ? "P2P-" : "", MAC2STR(psk->addr), hex);
 642         }
 643 }
 644
 645 #endif /* CONFIG_P2P */
 646
 647
 648 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 649 {
 650         int i;
 651
 652 #define STR(t) write_str(f, #t, ssid)
 653 #define INT(t) write_int(f, #t, ssid->t, 0)
 654 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 655 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 656 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 657
 658         STR(ssid);
 659         INT(scan_ssid);
 660         write_bssid(f, ssid);
 661         write_psk(f, ssid);
 662         write_proto(f, ssid);
 663         write_key_mgmt(f, ssid);
 664         INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
 665         write_pairwise(f, ssid);
 666         write_group(f, ssid);
 667         write_auth_alg(f, ssid);
 668         STR(bgscan);
 669         STR(autoscan);
 670         STR(scan_freq);
 671 #ifdef IEEE8021X_EAPOL
 672         write_eap(f, ssid);
 673         STR(identity);
 674         STR(anonymous_identity);
 675         STR(password);
 676         STR(ca_cert);
 677         STR(ca_path);
 678         STR(client_cert);
 679         STR(private_key);
 680         STR(private_key_passwd);
 681         STR(dh_file);
 682         STR(subject_match);
 683         STR(altsubject_match);
 684         STR(domain_suffix_match);
 685         STR(ca_cert2);
 686         STR(ca_path2);
 687         STR(client_cert2);
 688         STR(private_key2);
 689         STR(private_key2_passwd);
 690         STR(dh_file2);
 691         STR(subject_match2);
 692         STR(altsubject_match2);
 693         STR(domain_suffix_match2);
 694         STR(phase1);
 695         STR(phase2);
 696         STR(pcsc);
 697         STR(pin);
 698         STR(engine_id);
 699         STR(key_id);
 700         STR(cert_id);
 701         STR(ca_cert_id);
 702         STR(key2_id);
 703         STR(pin2);
 704         STR(engine2_id);
 705         STR(cert2_id);
 706         STR(ca_cert2_id);
 707         INTe(engine);
 708         INTe(engine2);
 709         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 710 #endif /* IEEE8021X_EAPOL */
 711         for (i = 0; i < 4; i++)
 712                 write_wep_key(f, i, ssid);
 713         INT(wep_tx_keyidx);
 714         INT(priority);
 715 #ifdef IEEE8021X_EAPOL
 716         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 717         STR(pac_file);
 718         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 719         INTe(ocsp);
 720         INT_DEFe(sim_num, DEFAULT_USER_SELECTED_SIM);
 721 #endif /* IEEE8021X_EAPOL */
 722         INT(mode);
 723         INT(frequency);
 724         write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
 725         INT(disabled);
 726         INT(peerkey);
 727 #ifdef CONFIG_IEEE80211W
 728         write_int(f, "ieee80211w", ssid->ieee80211w,
 729                   MGMT_FRAME_PROTECTION_DEFAULT);
 730 #endif /* CONFIG_IEEE80211W */
 731         STR(id_str);
 732 #ifdef CONFIG_P2P
 733         write_go_p2p_dev_addr(f, ssid);
 734         write_p2p_client_list(f, ssid);
 735         write_psk_list(f, ssid);
 736 #endif /* CONFIG_P2P */
 737         INT(dtim_period);
 738         INT(beacon_int);
 739
 740 #undef STR
 741 #undef INT
 742 #undef INT_DEF
 743 }
 744
 745
 746 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 747 {
 748         size_t i;
 749
 750         if (cred->priority)
 751                 fprintf(f, "\tpriority=%d\n", cred->priority);
 752         if (cred->pcsc)
 753                 fprintf(f, "\tpcsc=%d\n", cred->pcsc);
 754         if (cred->realm)
 755                 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
 756         if (cred->username)
 757                 fprintf(f, "\tusername=\"%s\"\n", cred->username);
 758         if (cred->password && cred->ext_password)
 759                 fprintf(f, "\tpassword=ext:%s\n", cred->password);
 760         else if (cred->password)
 761                 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
 762         if (cred->ca_cert)
 763                 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
 764         if (cred->client_cert)
 765                 fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
 766         if (cred->private_key)
 767                 fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
 768         if (cred->private_key_passwd)
 769                 fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
 770                         cred->private_key_passwd);
 771         if (cred->imsi)
 772                 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 773         if (cred->milenage)
 774                 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
 775         for (i = 0; i < cred->num_domain; i++)
 776                 fprintf(f, "\tdomain=\"%s\"\n", cred->domain[i]);
 777         if (cred->domain_suffix_match)
 778                 fprintf(f, "\tdomain_suffix_match=\"%s\"\n",
 779                         cred->domain_suffix_match);
 780         if (cred->roaming_consortium_len) {
 781                 fprintf(f, "\troaming_consortium=");
 782                 for (i = 0; i < cred->roaming_consortium_len; i++)
 783                         fprintf(f, "%02x", cred->roaming_consortium[i]);
 784                 fprintf(f, "\n");
 785         }
 786         if (cred->eap_method) {
 787                 const char *name;
 788                 name = eap_get_name(cred->eap_method[0].vendor,
 789                                     cred->eap_method[0].method);
 790                 fprintf(f, "\teap=%s\n", name);
 791         }
 792         if (cred->phase1)
 793                 fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
 794         if (cred->phase2)
 795                 fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
 796         if (cred->excluded_ssid) {
 797                 size_t j;
 798                 for (i = 0; i < cred->num_excluded_ssid; i++) {
 799                         struct excluded_ssid *e = &cred->excluded_ssid[i];
 800                         fprintf(f, "\texcluded_ssid=");
 801                         for (j = 0; j < e->ssid_len; j++)
 802                                 fprintf(f, "%02x", e->ssid[j]);
 803                         fprintf(f, "\n");
 804                 }
 805         }
 806         if (cred->roaming_partner) {
 807                 for (i = 0; i < cred->num_roaming_partner; i++) {
 808                         struct roaming_partner *p = &cred->roaming_partner[i];
 809                         fprintf(f, "\troaming_partner=\"%s,%d,%u,%s\"\n",
 810                                 p->fqdn, p->exact_match, p->priority,
 811                                 p->country);
 812                 }
 813         }
 814         if (cred->update_identifier)
 815                 fprintf(f, "\tupdate_identifier=%d\n", cred->update_identifier);
 816
 817         if (cred->provisioning_sp)
 818                 fprintf(f, "\tprovisioning_sp=\"%s\"\n", cred->provisioning_sp);
 819         if (cred->sp_priority)
 820                 fprintf(f, "\tsp_priority=%d\n", cred->sp_priority);
 821
 822         if (cred->min_dl_bandwidth_home)
 823                 fprintf(f, "\tmin_dl_bandwidth_home=%u\n",
 824                         cred->min_dl_bandwidth_home);
 825         if (cred->min_ul_bandwidth_home)
 826                 fprintf(f, "\tmin_ul_bandwidth_home=%u\n",
 827                         cred->min_ul_bandwidth_home);
 828         if (cred->min_dl_bandwidth_roaming)
 829                 fprintf(f, "\tmin_dl_bandwidth_roaming=%u\n",
 830                         cred->min_dl_bandwidth_roaming);
 831         if (cred->min_ul_bandwidth_roaming)
 832                 fprintf(f, "\tmin_ul_bandwidth_roaming=%u\n",
 833                         cred->min_ul_bandwidth_roaming);
 834
 835         if (cred->max_bss_load)
 836                 fprintf(f, "\tmax_bss_load=%u\n",
 837                         cred->max_bss_load);
 838
 839         if (cred->ocsp)
 840                 fprintf(f, "\tocsp=%d\n", cred->ocsp);
 841
 842         if (cred->num_req_conn_capab) {
 843                 for (i = 0; i < cred->num_req_conn_capab; i++) {
 844                         int *ports;
 845
 846                         fprintf(f, "\treq_conn_capab=%u",
 847                                 cred->req_conn_capab_proto[i]);
 848                         ports = cred->req_conn_capab_port[i];
 849                         if (ports) {
 850                                 int j;
 851                                 for (j = 0; ports[j] != -1; j++) {
 852                                         fprintf(f, "%s%d", j > 0 ? "," : ":",
 853                                                 ports[j]);
 854                                 }
 855                         }
 856                         fprintf(f, "\n");
 857                 }
 858         }
 859
 860         if (cred->required_roaming_consortium_len) {
 861                 fprintf(f, "\trequired_roaming_consortium=");
 862                 for (i = 0; i < cred->required_roaming_consortium_len; i++)
 863                         fprintf(f, "%02x",
 864                                 cred->required_roaming_consortium[i]);
 865                 fprintf(f, "\n");
 866         }
 867
 868         if (cred->sim_num != DEFAULT_USER_SELECTED_SIM)
 869                 fprintf(f, "\tsim_num=%d\n", cred->sim_num);
 870 }
 871
 872
 873 #ifndef CONFIG_NO_CONFIG_BLOBS
 874 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 875 {
 876         unsigned char *encoded;
 877
 878         encoded = base64_encode(blob->data, blob->len, NULL);
 879         if (encoded == NULL)
 880                 return -1;
 881
 882         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 883         os_free(encoded);
 884         return 0;
 885 }
 886 #endif /* CONFIG_NO_CONFIG_BLOBS */
 887
 888
 889 static void write_global_bin(FILE *f, const char *field,
 890                              const struct wpabuf *val)
 891 {
 892         size_t i;
 893         const u8 *pos;
 894
 895         if (val == NULL)
 896                 return;
 897
 898         fprintf(f, "%s=", field);
 899         pos = wpabuf_head(val);
 900         for (i = 0; i < wpabuf_len(val); i++)
 901                 fprintf(f, "%02X", *pos++);
 902         fprintf(f, "\n");
 903 }
 904
 905
 906 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 907 {
 908 #ifdef CONFIG_CTRL_IFACE
 909         if (config->ctrl_interface)
 910                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 911         if (config->ctrl_interface_group)
 912                 fprintf(f, "ctrl_interface_group=%s\n",
 913                         config->ctrl_interface_group);
 914 #endif /* CONFIG_CTRL_IFACE */
 915         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 916                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 917         if (config->ap_scan != DEFAULT_AP_SCAN)
 918                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 919         if (config->disable_scan_offload)
 920                 fprintf(f, "disable_scan_offload=%d\n",
 921                         config->disable_scan_offload);
 922         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 923                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 924         if (config->opensc_engine_path)
 925                 fprintf(f, "opensc_engine_path=%s\n",
 926                         config->opensc_engine_path);
 927         if (config->pkcs11_engine_path)
 928                 fprintf(f, "pkcs11_engine_path=%s\n",
 929                         config->pkcs11_engine_path);
 930         if (config->pkcs11_module_path)
 931                 fprintf(f, "pkcs11_module_path=%s\n",
 932                         config->pkcs11_module_path);
 933         if (config->pcsc_reader)
 934                 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
 935         if (config->pcsc_pin)
 936                 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
 937         if (config->driver_param)
 938                 fprintf(f, "driver_param=%s\n", config->driver_param);
 939         if (config->dot11RSNAConfigPMKLifetime)
 940                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 941                         config->dot11RSNAConfigPMKLifetime);
 942         if (config->dot11RSNAConfigPMKReauthThreshold)
 943                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 944                         config->dot11RSNAConfigPMKReauthThreshold);
 945         if (config->dot11RSNAConfigSATimeout)
 946                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 947                         config->dot11RSNAConfigSATimeout);
 948         if (config->update_config)
 949                 fprintf(f, "update_config=%d\n", config->update_config);
 950 #ifdef CONFIG_WPS
 951         if (!is_nil_uuid(config->uuid)) {
 952                 char buf[40];
 953                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 954                 fprintf(f, "uuid=%s\n", buf);
 955         }
 956         if (config->device_name)
 957                 fprintf(f, "device_name=%s\n", config->device_name);
 958         if (config->manufacturer)
 959                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 960         if (config->model_name)
 961                 fprintf(f, "model_name=%s\n", config->model_name);
 962         if (config->model_number)
 963                 fprintf(f, "model_number=%s\n", config->model_number);
 964         if (config->serial_number)
 965                 fprintf(f, "serial_number=%s\n", config->serial_number);
 966         {
 967                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 968                 buf = wps_dev_type_bin2str(config->device_type,
 969                                            _buf, sizeof(_buf));
 970                 if (os_strcmp(buf, "0-00000000-0") != 0)
 971                         fprintf(f, "device_type=%s\n", buf);
 972         }
 973         if (WPA_GET_BE32(config->os_version))
 974                 fprintf(f, "os_version=%08x\n",
 975                         WPA_GET_BE32(config->os_version));
 976         if (config->config_methods)
 977                 fprintf(f, "config_methods=%s\n", config->config_methods);
 978         if (config->wps_cred_processing)
 979                 fprintf(f, "wps_cred_processing=%d\n",
 980                         config->wps_cred_processing);
 981         if (config->wps_vendor_ext_m1) {
 982                 int i, len = wpabuf_len(config->wps_vendor_ext_m1);
 983                 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
 984                 if (len > 0) {
 985                         fprintf(f, "wps_vendor_ext_m1=");
 986                         for (i = 0; i < len; i++)
 987                                 fprintf(f, "%02x", *p++);
 988                         fprintf(f, "\n");
 989                 }
 990         }
 991 #endif /* CONFIG_WPS */
 992 #ifdef CONFIG_P2P
 993         if (config->p2p_listen_reg_class)
 994                 fprintf(f, "p2p_listen_reg_class=%u\n",
 995                         config->p2p_listen_reg_class);
 996         if (config->p2p_listen_channel)
 997                 fprintf(f, "p2p_listen_channel=%u\n",
 998                         config->p2p_listen_channel);
 999         if (config->p2p_oper_reg_class)
1000                 fprintf(f, "p2p_oper_reg_class=%u\n",
1001                         config->p2p_oper_reg_class);
1002         if (config->p2p_oper_channel)
1003                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
1004         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
1005                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
1006         if (config->p2p_ssid_postfix)
1007                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
1008         if (config->persistent_reconnect)
1009                 fprintf(f, "persistent_reconnect=%u\n",
1010                         config->persistent_reconnect);
1011         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
1012                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
1013         if (config->p2p_group_idle)
1014                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
1015         if (config->p2p_pref_chan) {
1016                 unsigned int i;
1017                 fprintf(f, "p2p_pref_chan=");
1018                 for (i = 0; i < config->num_p2p_pref_chan; i++) {
1019                         fprintf(f, "%s%u:%u", i > 0 ? "," : "",
1020                                 config->p2p_pref_chan[i].op_class,
1021                                 config->p2p_pref_chan[i].chan);
1022                 }
1023                 fprintf(f, "\n");
1024         }
1025         if (config->p2p_no_go_freq.num) {
1026                 char *val = freq_range_list_str(&config->p2p_no_go_freq);
1027                 if (val) {
1028                         fprintf(f, "p2p_no_go_freq=%s\n", val);
1029                         os_free(val);
1030                 }
1031         }
1032         if (config->p2p_add_cli_chan)
1033                 fprintf(f, "p2p_add_cli_chan=%d\n", config->p2p_add_cli_chan);
1034         if (config->p2p_go_ht40)
1035                 fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
1036         if (config->p2p_go_vht)
1037                 fprintf(f, "p2p_go_vht=%u\n", config->p2p_go_vht);
1038         if (config->p2p_disabled)
1039                 fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
1040         if (config->p2p_no_group_iface)
1041                 fprintf(f, "p2p_no_group_iface=%u\n",
1042                         config->p2p_no_group_iface);
1043         if (config->p2p_ignore_shared_freq)
1044                 fprintf(f, "p2p_ignore_shared_freq=%u\n",
1045                         config->p2p_ignore_shared_freq);
1046 #endif /* CONFIG_P2P */
1047         if (config->country[0] && config->country[1]) {
1048                 fprintf(f, "country=%c%c\n",
1049                         config->country[0], config->country[1]);
1050         }
1051         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
1052                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
1053         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
1054                 fprintf(f, "bss_expiration_age=%u\n",
1055                         config->bss_expiration_age);
1056         if (config->bss_expiration_scan_count !=
1057             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
1058                 fprintf(f, "bss_expiration_scan_count=%u\n",
1059                         config->bss_expiration_scan_count);
1060         if (config->filter_ssids)
1061                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
1062         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
1063                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
1064         if (config->disassoc_low_ack)
1065                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
1066 #ifdef CONFIG_HS20
1067         if (config->hs20)
1068                 fprintf(f, "hs20=1\n");
1069 #endif /* CONFIG_HS20 */
1070 #ifdef CONFIG_INTERWORKING
1071         if (config->interworking)
1072                 fprintf(f, "interworking=%u\n", config->interworking);
1073         if (!is_zero_ether_addr(config->hessid))
1074                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
1075         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
1076                 fprintf(f, "access_network_type=%d\n",
1077                         config->access_network_type);
1078 #endif /* CONFIG_INTERWORKING */
1079         if (config->pbc_in_m1)
1080                 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
1081         if (config->wps_nfc_pw_from_config) {
1082                 if (config->wps_nfc_dev_pw_id)
1083                         fprintf(f, "wps_nfc_dev_pw_id=%d\n",
1084                                 config->wps_nfc_dev_pw_id);
1085                 write_global_bin(f, "wps_nfc_dh_pubkey",
1086                                  config->wps_nfc_dh_pubkey);
1087                 write_global_bin(f, "wps_nfc_dh_privkey",
1088                                  config->wps_nfc_dh_privkey);
1089                 write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
1090         }
1091
1092         if (config->ext_password_backend)
1093                 fprintf(f, "ext_password_backend=%s\n",
1094                         config->ext_password_backend);
1095         if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
1096                 fprintf(f, "p2p_go_max_inactivity=%d\n",
1097                         config->p2p_go_max_inactivity);
1098         if (config->auto_interworking)
1099                 fprintf(f, "auto_interworking=%d\n",
1100                         config->auto_interworking);
1101         if (config->okc)
1102                 fprintf(f, "okc=%d\n", config->okc);
1103         if (config->pmf)
1104                 fprintf(f, "pmf=%d\n", config->pmf);
1105         if (config->dtim_period)
1106                 fprintf(f, "dtim_period=%d\n", config->dtim_period);
1107         if (config->beacon_int)
1108                 fprintf(f, "beacon_int=%d\n", config->beacon_int);
1109
1110         if (config->sae_groups) {
1111                 int i;
1112                 fprintf(f, "sae_groups=");
1113                 for (i = 0; config->sae_groups[i] >= 0; i++) {
1114                         fprintf(f, "%s%d", i > 0 ? " " : "",
1115                                 config->sae_groups[i]);
1116                 }
1117                 fprintf(f, "\n");
1118         }
1119
1120         if (config->ap_vendor_elements) {
1121                 int i, len = wpabuf_len(config->ap_vendor_elements);
1122                 const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1123                 if (len > 0) {
1124                         fprintf(f, "ap_vendor_elements=");
1125                         for (i = 0; i < len; i++)
1126                                 fprintf(f, "%02x", *p++);
1127                         fprintf(f, "\n");
1128                 }
1129         }
1130
1131         if (config->ignore_old_scan_res)
1132                 fprintf(f, "ignore_old_scan_res=%d\n",
1133                         config->ignore_old_scan_res);
1134
1135         if (config->freq_list && config->freq_list[0]) {
1136                 int i;
1137                 fprintf(f, "freq_list=");
1138                 for (i = 0; config->freq_list[i]; i++) {
1139                         fprintf(f, "%s%u", i > 0 ? " " : "",
1140                                 config->freq_list[i]);
1141                 }
1142                 fprintf(f, "\n");
1143         }
1144         if (config->scan_cur_freq != DEFAULT_SCAN_CUR_FREQ)
1145                 fprintf(f, "scan_cur_freq=%d\n", config->scan_cur_freq);
1146
1147         if (config->sched_scan_interval)
1148                 fprintf(f, "sched_scan_interval=%u\n",
1149                         config->sched_scan_interval);
1150
1151         if (config->external_sim)
1152                 fprintf(f, "external_sim=%d\n", config->external_sim);
1153
1154         if (config->tdls_external_control)
1155                 fprintf(f, "tdls_external_control=%d\n",
1156                         config->tdls_external_control);
1157
1158         if (config->wowlan_triggers)
1159                 fprintf(f, "wowlan_triggers=\"%s\"\n",
1160                         config->wowlan_triggers);
1161
1162         if (config->bgscan)
1163                 fprintf(f, "bgscan=\"%s\"\n", config->bgscan);
1164 }
1165
1166 #endif /* CONFIG_NO_CONFIG_WRITE */
1167
1168
1169 int wpa_config_write(const char *name, struct wpa_config *config)
1170 {
1171 #ifndef CONFIG_NO_CONFIG_WRITE
1172         FILE *f;
1173         struct wpa_ssid *ssid;
1174         struct wpa_cred *cred;
1175 #ifndef CONFIG_NO_CONFIG_BLOBS
1176         struct wpa_config_blob *blob;
1177 #endif /* CONFIG_NO_CONFIG_BLOBS */
1178         int ret = 0;
1179
1180         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1181
1182         f = fopen(name, "w");
1183         if (f == NULL) {
1184                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1185                 return -1;
1186         }
1187
1188         wpa_config_write_global(f, config);
1189
1190         for (cred = config->cred; cred; cred = cred->next) {
1191                 if (cred->temporary)
1192                         continue;
1193                 fprintf(f, "\ncred={\n");
1194                 wpa_config_write_cred(f, cred);
1195                 fprintf(f, "}\n");
1196         }
1197
1198         for (ssid = config->ssid; ssid; ssid = ssid->next) {
1199                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1200                         continue; /* do not save temporary networks */
1201                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1202                     !ssid->passphrase)
1203                         continue; /* do not save invalid network */
1204                 fprintf(f, "\nnetwork={\n");
1205                 wpa_config_write_network(f, ssid);
1206                 fprintf(f, "}\n");
1207         }
1208
1209 #ifndef CONFIG_NO_CONFIG_BLOBS
1210         for (blob = config->blobs; blob; blob = blob->next) {
1211                 ret = wpa_config_write_blob(f, blob);
1212                 if (ret)
1213                         break;
1214         }
1215 #endif /* CONFIG_NO_CONFIG_BLOBS */
1216
1217         fclose(f);
1218
1219         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1220                    name, ret ? "un" : "");
1221         return ret;
1222 #else /* CONFIG_NO_CONFIG_WRITE */
1223         return -1;
1224 #endif /* CONFIG_NO_CONFIG_WRITE */
1225 }