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         ssid->id = id;
 162
 163         wpa_config_set_network_defaults(ssid);
 164
 165         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 166                 if (os_strcmp(pos, "}") == 0) {
 167                         end = 1;
 168                         break;
 169                 }
 170
 171                 pos2 = os_strchr(pos, '=');
 172                 if (pos2 == NULL) {
 173                         wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
 174                                    "'%s'.", *line, pos);
 175                         errors++;
 176                         continue;
 177                 }
 178
 179                 *pos2++ = '\0';
 180                 if (*pos2 == '"') {
 181                         if (os_strchr(pos2 + 1, '"') == NULL) {
 182                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 183                                            "quotation '%s'.", *line, pos2);
 184                                 errors++;
 185                                 continue;
 186                         }
 187                 }
 188
 189                 if (wpa_config_set(ssid, pos, pos2, *line) < 0)
 190                         errors++;
 191         }
 192
 193         if (!end) {
 194                 wpa_printf(MSG_ERROR, "Line %d: network block was not "
 195                            "terminated properly.", *line);
 196                 errors++;
 197         }
 198
 199         errors += wpa_config_validate_network(ssid, *line);
 200
 201         if (errors) {
 202                 wpa_config_free_ssid(ssid);
 203                 ssid = NULL;
 204         }
 205
 206         return ssid;
 207 }
 208
 209
 210 static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 211 {
 212         struct wpa_cred *cred;
 213         int errors = 0, end = 0;
 214         char buf[256], *pos, *pos2;
 215
 216         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
 217         cred = os_zalloc(sizeof(*cred));
 218         if (cred == NULL)
 219                 return NULL;
 220         cred->id = id;
 221
 222         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 223                 if (os_strcmp(pos, "}") == 0) {
 224                         end = 1;
 225                         break;
 226                 }
 227
 228                 pos2 = os_strchr(pos, '=');
 229                 if (pos2 == NULL) {
 230                         wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
 231                                    "'%s'.", *line, pos);
 232                         errors++;
 233                         continue;
 234                 }
 235
 236                 *pos2++ = '\0';
 237                 if (*pos2 == '"') {
 238                         if (os_strchr(pos2 + 1, '"') == NULL) {
 239                                 wpa_printf(MSG_ERROR, "Line %d: invalid "
 240                                            "quotation '%s'.", *line, pos2);
 241                                 errors++;
 242                                 continue;
 243                         }
 244                 }
 245
 246                 if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
 247                         errors++;
 248         }
 249
 250         if (!end) {
 251                 wpa_printf(MSG_ERROR, "Line %d: cred block was not "
 252                            "terminated properly.", *line);
 253                 errors++;
 254         }
 255
 256         if (errors) {
 257                 wpa_config_free_cred(cred);
 258                 cred = NULL;
 259         }
 260
 261         return cred;
 262 }
 263
 264
 265 #ifndef CONFIG_NO_CONFIG_BLOBS
 266 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
 267                                                      const char *name)
 268 {
 269         struct wpa_config_blob *blob;
 270         char buf[256], *pos;
 271         unsigned char *encoded = NULL, *nencoded;
 272         int end = 0;
 273         size_t encoded_len = 0, len;
 274
 275         wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
 276                    *line, name);
 277
 278         while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 279                 if (os_strcmp(pos, "}") == 0) {
 280                         end = 1;
 281                         break;
 282                 }
 283
 284                 len = os_strlen(pos);
 285                 nencoded = os_realloc(encoded, encoded_len + len);
 286                 if (nencoded == NULL) {
 287                         wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
 288                                    "blob", *line);
 289                         os_free(encoded);
 290                         return NULL;
 291                 }
 292                 encoded = nencoded;
 293                 os_memcpy(encoded + encoded_len, pos, len);
 294                 encoded_len += len;
 295         }
 296
 297         if (!end) {
 298                 wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
 299                            "properly", *line);
 300                 os_free(encoded);
 301                 return NULL;
 302         }
 303
 304         blob = os_zalloc(sizeof(*blob));
 305         if (blob == NULL) {
 306                 os_free(encoded);
 307                 return NULL;
 308         }
 309         blob->name = os_strdup(name);
 310         blob->data = base64_decode(encoded, encoded_len, &blob->len);
 311         os_free(encoded);
 312
 313         if (blob->name == NULL || blob->data == NULL) {
 314                 wpa_config_free_blob(blob);
 315                 return NULL;
 316         }
 317
 318         return blob;
 319 }
 320
 321
 322 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
 323                                    int *line, char *bname)
 324 {
 325         char *name_end;
 326         struct wpa_config_blob *blob;
 327
 328         name_end = os_strchr(bname, '=');
 329         if (name_end == NULL) {
 330                 wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
 331                            *line);
 332                 return -1;
 333         }
 334         *name_end = '\0';
 335
 336         blob = wpa_config_read_blob(f, line, bname);
 337         if (blob == NULL) {
 338                 wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
 339                            *line, bname);
 340                 return -1;
 341         }
 342         wpa_config_set_blob(config, blob);
 343         return 0;
 344 }
 345 #endif /* CONFIG_NO_CONFIG_BLOBS */
 346
 347
 348 struct wpa_config * wpa_config_read(const char *name)
 349 {
 350         FILE *f;
 351         char buf[512], *pos;
 352         int errors = 0, line = 0;
 353         struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
 354         struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
 355         struct wpa_config *config;
 356         int id = 0;
 357         int cred_id = 0;
 358
 359         config = wpa_config_alloc_empty(NULL, NULL);
 360         if (config == NULL) {
 361                 wpa_printf(MSG_ERROR, "Failed to allocate config file "
 362                            "structure");
 363                 return NULL;
 364         }
 365
 366         wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
 367         f = fopen(name, "r");
 368         if (f == NULL) {
 369                 wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
 370                            "error: %s", name, strerror(errno));
 371                 os_free(config);
 372                 return NULL;
 373         }
 374
 375         while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
 376                 if (os_strcmp(pos, "network={") == 0) {
 377                         ssid = wpa_config_read_network(f, &line, id++);
 378                         if (ssid == NULL) {
 379                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 380                                            "parse network block.", line);
 381                                 errors++;
 382                                 continue;
 383                         }
 384                         if (head == NULL) {
 385                                 head = tail = ssid;
 386                         } else {
 387                                 tail->next = ssid;
 388                                 tail = ssid;
 389                         }
 390                         if (wpa_config_add_prio_network(config, ssid)) {
 391                                 wpa_printf(MSG_ERROR, "Line %d: failed to add "
 392                                            "network block to priority list.",
 393                                            line);
 394                                 errors++;
 395                                 continue;
 396                         }
 397                 } else if (os_strcmp(pos, "cred={") == 0) {
 398                         cred = wpa_config_read_cred(f, &line, cred_id++);
 399                         if (cred == NULL) {
 400                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 401                                            "parse cred block.", line);
 402                                 errors++;
 403                                 continue;
 404                         }
 405                         if (cred_head == NULL) {
 406                                 cred_head = cred_tail = cred;
 407                         } else {
 408                                 cred_tail->next = cred;
 409                                 cred_tail = cred;
 410                         }
 411 #ifndef CONFIG_NO_CONFIG_BLOBS
 412                 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
 413                         if (wpa_config_process_blob(config, f, &line, pos + 12)
 414                             < 0) {
 415                                 wpa_printf(MSG_ERROR, "Line %d: failed to "
 416                                            "process blob.", line);
 417                                 errors++;
 418                                 continue;
 419                         }
 420 #endif /* CONFIG_NO_CONFIG_BLOBS */
 421                 } else if (wpa_config_process_global(config, pos, line) < 0) {
 422                         wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
 423                                    "line '%s'.", line, pos);
 424                         errors++;
 425                         continue;
 426                 }
 427         }
 428
 429         fclose(f);
 430
 431         config->ssid = head;
 432         wpa_config_debug_dump_networks(config);
 433         config->cred = cred_head;
 434
 435 #ifndef WPA_IGNORE_CONFIG_ERRORS
 436         if (errors) {
 437                 wpa_config_free(config);
 438                 config = NULL;
 439                 head = NULL;
 440         }
 441 #endif /* WPA_IGNORE_CONFIG_ERRORS */
 442
 443         return config;
 444 }
 445
 446
 447 #ifndef CONFIG_NO_CONFIG_WRITE
 448
 449 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
 450 {
 451         char *value = wpa_config_get(ssid, field);
 452         if (value == NULL)
 453                 return;
 454         fprintf(f, "\t%s=%s\n", field, value);
 455         os_free(value);
 456 }
 457
 458
 459 static void write_int(FILE *f, const char *field, int value, int def)
 460 {
 461         if (value == def)
 462                 return;
 463         fprintf(f, "\t%s=%d\n", field, value);
 464 }
 465
 466
 467 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
 468 {
 469         char *value = wpa_config_get(ssid, "bssid");
 470         if (value == NULL)
 471                 return;
 472         fprintf(f, "\tbssid=%s\n", value);
 473         os_free(value);
 474 }
 475
 476
 477 static void write_psk(FILE *f, struct wpa_ssid *ssid)
 478 {
 479         char *value = wpa_config_get(ssid, "psk");
 480         if (value == NULL)
 481                 return;
 482         fprintf(f, "\tpsk=%s\n", value);
 483         os_free(value);
 484 }
 485
 486
 487 static void write_proto(FILE *f, struct wpa_ssid *ssid)
 488 {
 489         char *value;
 490
 491         if (ssid->proto == DEFAULT_PROTO)
 492                 return;
 493
 494         value = wpa_config_get(ssid, "proto");
 495         if (value == NULL)
 496                 return;
 497         if (value[0])
 498                 fprintf(f, "\tproto=%s\n", value);
 499         os_free(value);
 500 }
 501
 502
 503 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
 504 {
 505         char *value;
 506
 507         if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
 508                 return;
 509
 510         value = wpa_config_get(ssid, "key_mgmt");
 511         if (value == NULL)
 512                 return;
 513         if (value[0])
 514                 fprintf(f, "\tkey_mgmt=%s\n", value);
 515         os_free(value);
 516 }
 517
 518
 519 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
 520 {
 521         char *value;
 522
 523         if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
 524                 return;
 525
 526         value = wpa_config_get(ssid, "pairwise");
 527         if (value == NULL)
 528                 return;
 529         if (value[0])
 530                 fprintf(f, "\tpairwise=%s\n", value);
 531         os_free(value);
 532 }
 533
 534
 535 static void write_group(FILE *f, struct wpa_ssid *ssid)
 536 {
 537         char *value;
 538
 539         if (ssid->group_cipher == DEFAULT_GROUP)
 540                 return;
 541
 542         value = wpa_config_get(ssid, "group");
 543         if (value == NULL)
 544                 return;
 545         if (value[0])
 546                 fprintf(f, "\tgroup=%s\n", value);
 547         os_free(value);
 548 }
 549
 550
 551 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
 552 {
 553         char *value;
 554
 555         if (ssid->auth_alg == 0)
 556                 return;
 557
 558         value = wpa_config_get(ssid, "auth_alg");
 559         if (value == NULL)
 560                 return;
 561         if (value[0])
 562                 fprintf(f, "\tauth_alg=%s\n", value);
 563         os_free(value);
 564 }
 565
 566
 567 #ifdef IEEE8021X_EAPOL
 568 static void write_eap(FILE *f, struct wpa_ssid *ssid)
 569 {
 570         char *value;
 571
 572         value = wpa_config_get(ssid, "eap");
 573         if (value == NULL)
 574                 return;
 575
 576         if (value[0])
 577                 fprintf(f, "\teap=%s\n", value);
 578         os_free(value);
 579 }
 580 #endif /* IEEE8021X_EAPOL */
 581
 582
 583 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
 584 {
 585         char field[20], *value;
 586         int res;
 587
 588         res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
 589         if (res < 0 || (size_t) res >= sizeof(field))
 590                 return;
 591         value = wpa_config_get(ssid, field);
 592         if (value) {
 593                 fprintf(f, "\t%s=%s\n", field, value);
 594                 os_free(value);
 595         }
 596 }
 597
 598
 599 #ifdef CONFIG_P2P
 600 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
 601 {
 602         char *value = wpa_config_get(ssid, "p2p_client_list");
 603         if (value == NULL)
 604                 return;
 605         fprintf(f, "\tp2p_client_list=%s\n", value);
 606         os_free(value);
 607 }
 608 #endif /* CONFIG_P2P */
 609
 610
 611 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 612 {
 613         int i;
 614
 615 #define STR(t) write_str(f, #t, ssid)
 616 #define INT(t) write_int(f, #t, ssid->t, 0)
 617 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
 618 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
 619 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
 620
 621         STR(ssid);
 622         INT(scan_ssid);
 623         write_bssid(f, ssid);
 624         write_psk(f, ssid);
 625         write_proto(f, ssid);
 626         write_key_mgmt(f, ssid);
 627         INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
 628         write_pairwise(f, ssid);
 629         write_group(f, ssid);
 630         write_auth_alg(f, ssid);
 631         STR(bgscan);
 632         STR(autoscan);
 633 #ifdef IEEE8021X_EAPOL
 634         write_eap(f, ssid);
 635         STR(identity);
 636         STR(anonymous_identity);
 637         STR(password);
 638         STR(ca_cert);
 639         STR(ca_path);
 640         STR(client_cert);
 641         STR(private_key);
 642         STR(private_key_passwd);
 643         STR(dh_file);
 644         STR(subject_match);
 645         STR(altsubject_match);
 646         STR(ca_cert2);
 647         STR(ca_path2);
 648         STR(client_cert2);
 649         STR(private_key2);
 650         STR(private_key2_passwd);
 651         STR(dh_file2);
 652         STR(subject_match2);
 653         STR(altsubject_match2);
 654         STR(phase1);
 655         STR(phase2);
 656         STR(pcsc);
 657         STR(pin);
 658         STR(engine_id);
 659         STR(key_id);
 660         STR(cert_id);
 661         STR(ca_cert_id);
 662         STR(key2_id);
 663         STR(pin2);
 664         STR(engine2_id);
 665         STR(cert2_id);
 666         STR(ca_cert2_id);
 667         INTe(engine);
 668         INTe(engine2);
 669         INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
 670 #endif /* IEEE8021X_EAPOL */
 671         for (i = 0; i < 4; i++)
 672                 write_wep_key(f, i, ssid);
 673         INT(wep_tx_keyidx);
 674         INT(priority);
 675 #ifdef IEEE8021X_EAPOL
 676         INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
 677         STR(pac_file);
 678         INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 679 #endif /* IEEE8021X_EAPOL */
 680         INT(mode);
 681         write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
 682         INT(disabled);
 683         INT(peerkey);
 684 #ifdef CONFIG_IEEE80211W
 685         write_int(f, "ieee80211w", ssid->ieee80211w,
 686                   MGMT_FRAME_PROTECTION_DEFAULT);
 687 #endif /* CONFIG_IEEE80211W */
 688         STR(id_str);
 689 #ifdef CONFIG_P2P
 690         write_p2p_client_list(f, ssid);
 691 #endif /* CONFIG_P2P */
 692
 693 #undef STR
 694 #undef INT
 695 #undef INT_DEF
 696 }
 697
 698
 699 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 700 {
 701         if (cred->priority)
 702                 fprintf(f, "\tpriority=%d\n", cred->priority);
 703         if (cred->pcsc)
 704                 fprintf(f, "\tpcsc=%d\n", cred->pcsc);
 705         if (cred->realm)
 706                 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
 707         if (cred->username)
 708                 fprintf(f, "\tusername=\"%s\"\n", cred->username);
 709         if (cred->password && cred->ext_password)
 710                 fprintf(f, "\tpassword=ext:%s\n", cred->password);
 711         else if (cred->password)
 712                 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
 713         if (cred->ca_cert)
 714                 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
 715         if (cred->client_cert)
 716                 fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
 717         if (cred->private_key)
 718                 fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
 719         if (cred->private_key_passwd)
 720                 fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
 721                         cred->private_key_passwd);
 722         if (cred->imsi)
 723                 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 724         if (cred->milenage)
 725                 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
 726         if (cred->domain)
 727                 fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
 728         if (cred->roaming_consortium_len) {
 729                 size_t i;
 730                 fprintf(f, "\troaming_consortium=");
 731                 for (i = 0; i < cred->roaming_consortium_len; i++)
 732                         fprintf(f, "%02x", cred->roaming_consortium[i]);
 733                 fprintf(f, "\n");
 734         }
 735         if (cred->eap_method) {
 736                 const char *name;
 737                 name = eap_get_name(cred->eap_method[0].vendor,
 738                                     cred->eap_method[0].method);
 739                 fprintf(f, "\teap=%s\n", name);
 740         }
 741         if (cred->phase1)
 742                 fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
 743         if (cred->phase2)
 744                 fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
 745 }
 746
 747
 748 #ifndef CONFIG_NO_CONFIG_BLOBS
 749 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
 750 {
 751         unsigned char *encoded;
 752
 753         encoded = base64_encode(blob->data, blob->len, NULL);
 754         if (encoded == NULL)
 755                 return -1;
 756
 757         fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
 758         os_free(encoded);
 759         return 0;
 760 }
 761 #endif /* CONFIG_NO_CONFIG_BLOBS */
 762
 763
 764 static void write_global_bin(FILE *f, const char *field,
 765                              const struct wpabuf *val)
 766 {
 767         size_t i;
 768         const u8 *pos;
 769
 770         if (val == NULL)
 771                 return;
 772
 773         fprintf(f, "%s=", field);
 774         pos = wpabuf_head(val);
 775         for (i = 0; i < wpabuf_len(val); i++)
 776                 fprintf(f, "%02X", *pos++);
 777         fprintf(f, "\n");
 778 }
 779
 780
 781 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 782 {
 783 #ifdef CONFIG_CTRL_IFACE
 784         if (config->ctrl_interface)
 785                 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
 786         if (config->ctrl_interface_group)
 787                 fprintf(f, "ctrl_interface_group=%s\n",
 788                         config->ctrl_interface_group);
 789 #endif /* CONFIG_CTRL_IFACE */
 790         if (config->eapol_version != DEFAULT_EAPOL_VERSION)
 791                 fprintf(f, "eapol_version=%d\n", config->eapol_version);
 792         if (config->ap_scan != DEFAULT_AP_SCAN)
 793                 fprintf(f, "ap_scan=%d\n", config->ap_scan);
 794         if (config->disable_scan_offload)
 795                 fprintf(f, "disable_scan_offload=%d\n",
 796                         config->disable_scan_offload);
 797         if (config->fast_reauth != DEFAULT_FAST_REAUTH)
 798                 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
 799         if (config->opensc_engine_path)
 800                 fprintf(f, "opensc_engine_path=%s\n",
 801                         config->opensc_engine_path);
 802         if (config->pkcs11_engine_path)
 803                 fprintf(f, "pkcs11_engine_path=%s\n",
 804                         config->pkcs11_engine_path);
 805         if (config->pkcs11_module_path)
 806                 fprintf(f, "pkcs11_module_path=%s\n",
 807                         config->pkcs11_module_path);
 808         if (config->pcsc_reader)
 809                 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
 810         if (config->pcsc_pin)
 811                 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
 812         if (config->driver_param)
 813                 fprintf(f, "driver_param=%s\n", config->driver_param);
 814         if (config->dot11RSNAConfigPMKLifetime)
 815                 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
 816                         config->dot11RSNAConfigPMKLifetime);
 817         if (config->dot11RSNAConfigPMKReauthThreshold)
 818                 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
 819                         config->dot11RSNAConfigPMKReauthThreshold);
 820         if (config->dot11RSNAConfigSATimeout)
 821                 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
 822                         config->dot11RSNAConfigSATimeout);
 823         if (config->update_config)
 824                 fprintf(f, "update_config=%d\n", config->update_config);
 825 #ifdef CONFIG_WPS
 826         if (!is_nil_uuid(config->uuid)) {
 827                 char buf[40];
 828                 uuid_bin2str(config->uuid, buf, sizeof(buf));
 829                 fprintf(f, "uuid=%s\n", buf);
 830         }
 831         if (config->device_name)
 832                 fprintf(f, "device_name=%s\n", config->device_name);
 833         if (config->manufacturer)
 834                 fprintf(f, "manufacturer=%s\n", config->manufacturer);
 835         if (config->model_name)
 836                 fprintf(f, "model_name=%s\n", config->model_name);
 837         if (config->model_number)
 838                 fprintf(f, "model_number=%s\n", config->model_number);
 839         if (config->serial_number)
 840                 fprintf(f, "serial_number=%s\n", config->serial_number);
 841         {
 842                 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
 843                 buf = wps_dev_type_bin2str(config->device_type,
 844                                            _buf, sizeof(_buf));
 845                 if (os_strcmp(buf, "0-00000000-0") != 0)
 846                         fprintf(f, "device_type=%s\n", buf);
 847         }
 848         if (WPA_GET_BE32(config->os_version))
 849                 fprintf(f, "os_version=%08x\n",
 850                         WPA_GET_BE32(config->os_version));
 851         if (config->config_methods)
 852                 fprintf(f, "config_methods=%s\n", config->config_methods);
 853         if (config->wps_cred_processing)
 854                 fprintf(f, "wps_cred_processing=%d\n",
 855                         config->wps_cred_processing);
 856         if (config->wps_vendor_ext_m1) {
 857                 int i, len = wpabuf_len(config->wps_vendor_ext_m1);
 858                 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
 859                 if (len > 0) {
 860                         fprintf(f, "wps_vendor_ext_m1=");
 861                         for (i = 0; i < len; i++)
 862                                 fprintf(f, "%02x", *p++);
 863                         fprintf(f, "\n");
 864                 }
 865         }
 866 #endif /* CONFIG_WPS */
 867 #ifdef CONFIG_P2P
 868         if (config->p2p_listen_reg_class)
 869                 fprintf(f, "p2p_listen_reg_class=%u\n",
 870                         config->p2p_listen_reg_class);
 871         if (config->p2p_listen_channel)
 872                 fprintf(f, "p2p_listen_channel=%u\n",
 873                         config->p2p_listen_channel);
 874         if (config->p2p_oper_reg_class)
 875                 fprintf(f, "p2p_oper_reg_class=%u\n",
 876                         config->p2p_oper_reg_class);
 877         if (config->p2p_oper_channel)
 878                 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
 879         if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
 880                 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
 881         if (config->p2p_ssid_postfix)
 882                 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
 883         if (config->persistent_reconnect)
 884                 fprintf(f, "persistent_reconnect=%u\n",
 885                         config->persistent_reconnect);
 886         if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
 887                 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
 888         if (config->p2p_group_idle)
 889                 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
 890         if (config->p2p_pref_chan) {
 891                 unsigned int i;
 892                 fprintf(f, "p2p_pref_chan=");
 893                 for (i = 0; i < config->num_p2p_pref_chan; i++) {
 894                         fprintf(f, "%s%u:%u", i > 0 ? "," : "",
 895                                 config->p2p_pref_chan[i].op_class,
 896                                 config->p2p_pref_chan[i].chan);
 897                 }
 898                 fprintf(f, "\n");
 899         }
 900         if (config->p2p_go_ht40)
 901                 fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
 902         if (config->p2p_disabled)
 903                 fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
 904         if (config->p2p_no_group_iface)
 905                 fprintf(f, "p2p_no_group_iface=%u\n",
 906                         config->p2p_no_group_iface);
 907 #endif /* CONFIG_P2P */
 908         if (config->country[0] && config->country[1]) {
 909                 fprintf(f, "country=%c%c\n",
 910                         config->country[0], config->country[1]);
 911         }
 912         if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
 913                 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
 914         if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
 915                 fprintf(f, "bss_expiration_age=%u\n",
 916                         config->bss_expiration_age);
 917         if (config->bss_expiration_scan_count !=
 918             DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
 919                 fprintf(f, "bss_expiration_scan_count=%u\n",
 920                         config->bss_expiration_scan_count);
 921         if (config->filter_ssids)
 922                 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
 923         if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
 924                 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
 925         if (config->disassoc_low_ack)
 926                 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
 927 #ifdef CONFIG_HS20
 928         if (config->hs20)
 929                 fprintf(f, "hs20=1\n");
 930 #endif /* CONFIG_HS20 */
 931 #ifdef CONFIG_INTERWORKING
 932         if (config->interworking)
 933                 fprintf(f, "interworking=%u\n", config->interworking);
 934         if (!is_zero_ether_addr(config->hessid))
 935                 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
 936         if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
 937                 fprintf(f, "access_network_type=%d\n",
 938                         config->access_network_type);
 939 #endif /* CONFIG_INTERWORKING */
 940         if (config->pbc_in_m1)
 941                 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
 942         if (config->wps_nfc_dev_pw_id)
 943                 fprintf(f, "wps_nfc_dev_pw_id=%d\n",
 944                         config->wps_nfc_dev_pw_id);
 945         write_global_bin(f, "wps_nfc_dh_pubkey", config->wps_nfc_dh_pubkey);
 946         write_global_bin(f, "wps_nfc_dh_privkey", config->wps_nfc_dh_privkey);
 947         write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
 948
 949         if (config->ext_password_backend)
 950                 fprintf(f, "ext_password_backend=%s\n",
 951                         config->ext_password_backend);
 952         if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
 953                 fprintf(f, "p2p_go_max_inactivity=%d\n",
 954                         config->p2p_go_max_inactivity);
 955         if (config->auto_interworking)
 956                 fprintf(f, "auto_interworking=%d\n",
 957                         config->auto_interworking);
 958         if (config->okc)
 959                 fprintf(f, "okc=%d\n", config->okc);
 960         if (config->pmf)
 961                 fprintf(f, "pmf=%d\n", config->pmf);
 962 }
 963
 964 #endif /* CONFIG_NO_CONFIG_WRITE */
 965
 966
 967 int wpa_config_write(const char *name, struct wpa_config *config)
 968 {
 969 #ifndef CONFIG_NO_CONFIG_WRITE
 970         FILE *f;
 971         struct wpa_ssid *ssid;
 972         struct wpa_cred *cred;
 973 #ifndef CONFIG_NO_CONFIG_BLOBS
 974         struct wpa_config_blob *blob;
 975 #endif /* CONFIG_NO_CONFIG_BLOBS */
 976         int ret = 0;
 977
 978         wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
 979
 980         f = fopen(name, "w");
 981         if (f == NULL) {
 982                 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
 983                 return -1;
 984         }
 985
 986         wpa_config_write_global(f, config);
 987
 988         for (cred = config->cred; cred; cred = cred->next) {
 989                 fprintf(f, "\ncred={\n");
 990                 wpa_config_write_cred(f, cred);
 991                 fprintf(f, "}\n");
 992         }
 993
 994         for (ssid = config->ssid; ssid; ssid = ssid->next) {
 995                 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
 996                         continue; /* do not save temporary networks */
 997                 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
 998                     !ssid->passphrase)
 999                         continue; /* do not save invalid network */
1000                 fprintf(f, "\nnetwork={\n");
1001                 wpa_config_write_network(f, ssid);
1002                 fprintf(f, "}\n");
1003         }
1004
1005 #ifndef CONFIG_NO_CONFIG_BLOBS
1006         for (blob = config->blobs; blob; blob = blob->next) {
1007                 ret = wpa_config_write_blob(f, blob);
1008                 if (ret)
1009                         break;
1010         }
1011 #endif /* CONFIG_NO_CONFIG_BLOBS */
1012
1013         fclose(f);
1014
1015         wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1016                    name, ret ? "un" : "");
1017         return ret;
1018 #else /* CONFIG_NO_CONFIG_WRITE */
1019         return -1;
1020 #endif /* CONFIG_NO_CONFIG_WRITE */
1021 }