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
newline_terminated(const char * buf,size_t buflen)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
skip_line_end(FILE * stream)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 */
wpa_config_get_line(char * s,int size,FILE * stream,int * line,char ** _pos)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
wpa_config_validate_network(struct wpa_ssid * ssid,int line)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
wpa_config_read_network(FILE * f,int * line,int id)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
wpa_config_read_cred(FILE * f,int * line,int id)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
wpa_config_read_blob(FILE * f,int * line,const char * name)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
wpa_config_process_blob(struct wpa_config * config,FILE * f,int * line,char * bname)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
wpa_config_read(const char * name,struct wpa_config * cfgp)348 struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp)
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 if (name == NULL)
360 return NULL;
361 if (cfgp)
362 config = cfgp;
363 else
364 config = wpa_config_alloc_empty(NULL, NULL);
365 if (config == NULL) {
366 wpa_printf(MSG_ERROR, "Failed to allocate config file "
367 "structure");
368 return NULL;
369 }
370 head = config->ssid;
371 cred_head = config->cred;
372
373 wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
374 f = fopen(name, "r");
375 if (f == NULL) {
376 wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
377 "error: %s", name, strerror(errno));
378 os_free(config);
379 return NULL;
380 }
381
382 while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
383 if (os_strcmp(pos, "network={") == 0) {
384 ssid = wpa_config_read_network(f, &line, id++);
385 if (ssid == NULL) {
386 wpa_printf(MSG_ERROR, "Line %d: failed to "
387 "parse network block.", line);
388 errors++;
389 continue;
390 }
391 if (head == NULL) {
392 head = tail = ssid;
393 } else {
394 tail->next = ssid;
395 tail = ssid;
396 }
397 if (wpa_config_add_prio_network(config, ssid)) {
398 wpa_printf(MSG_ERROR, "Line %d: failed to add "
399 "network block to priority list.",
400 line);
401 errors++;
402 continue;
403 }
404 } else if (os_strcmp(pos, "cred={") == 0) {
405 cred = wpa_config_read_cred(f, &line, cred_id++);
406 if (cred == NULL) {
407 wpa_printf(MSG_ERROR, "Line %d: failed to "
408 "parse cred block.", line);
409 errors++;
410 continue;
411 }
412 if (cred_head == NULL) {
413 cred_head = cred_tail = cred;
414 } else {
415 cred_tail->next = cred;
416 cred_tail = cred;
417 }
418 #ifndef CONFIG_NO_CONFIG_BLOBS
419 } else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
420 if (wpa_config_process_blob(config, f, &line, pos + 12)
421 < 0) {
422 wpa_printf(MSG_ERROR, "Line %d: failed to "
423 "process blob.", line);
424 errors++;
425 continue;
426 }
427 #endif /* CONFIG_NO_CONFIG_BLOBS */
428 } else if (wpa_config_process_global(config, pos, line) < 0) {
429 wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
430 "line '%s'.", line, pos);
431 errors++;
432 continue;
433 }
434 }
435
436 fclose(f);
437
438 config->ssid = head;
439 wpa_config_debug_dump_networks(config);
440 config->cred = cred_head;
441
442 #ifndef WPA_IGNORE_CONFIG_ERRORS
443 if (errors) {
444 wpa_config_free(config);
445 config = NULL;
446 head = NULL;
447 }
448 #endif /* WPA_IGNORE_CONFIG_ERRORS */
449
450 return config;
451 }
452
453
454 #ifndef CONFIG_NO_CONFIG_WRITE
455
write_str(FILE * f,const char * field,struct wpa_ssid * ssid)456 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
457 {
458 char *value = wpa_config_get(ssid, field);
459 if (value == NULL)
460 return;
461 fprintf(f, "\t%s=%s\n", field, value);
462 os_free(value);
463 }
464
465
write_int(FILE * f,const char * field,int value,int def)466 static void write_int(FILE *f, const char *field, int value, int def)
467 {
468 if (value == def)
469 return;
470 fprintf(f, "\t%s=%d\n", field, value);
471 }
472
473
write_bssid(FILE * f,struct wpa_ssid * ssid)474 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
475 {
476 char *value = wpa_config_get(ssid, "bssid");
477 if (value == NULL)
478 return;
479 fprintf(f, "\tbssid=%s\n", value);
480 os_free(value);
481 }
482
483
write_psk(FILE * f,struct wpa_ssid * ssid)484 static void write_psk(FILE *f, struct wpa_ssid *ssid)
485 {
486 char *value = wpa_config_get(ssid, "psk");
487 if (value == NULL)
488 return;
489 fprintf(f, "\tpsk=%s\n", value);
490 os_free(value);
491 }
492
493
write_proto(FILE * f,struct wpa_ssid * ssid)494 static void write_proto(FILE *f, struct wpa_ssid *ssid)
495 {
496 char *value;
497
498 if (ssid->proto == DEFAULT_PROTO)
499 return;
500
501 value = wpa_config_get(ssid, "proto");
502 if (value == NULL)
503 return;
504 if (value[0])
505 fprintf(f, "\tproto=%s\n", value);
506 os_free(value);
507 }
508
509
write_key_mgmt(FILE * f,struct wpa_ssid * ssid)510 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
511 {
512 char *value;
513
514 if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
515 return;
516
517 value = wpa_config_get(ssid, "key_mgmt");
518 if (value == NULL)
519 return;
520 if (value[0])
521 fprintf(f, "\tkey_mgmt=%s\n", value);
522 os_free(value);
523 }
524
525
write_pairwise(FILE * f,struct wpa_ssid * ssid)526 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
527 {
528 char *value;
529
530 if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
531 return;
532
533 value = wpa_config_get(ssid, "pairwise");
534 if (value == NULL)
535 return;
536 if (value[0])
537 fprintf(f, "\tpairwise=%s\n", value);
538 os_free(value);
539 }
540
541
write_group(FILE * f,struct wpa_ssid * ssid)542 static void write_group(FILE *f, struct wpa_ssid *ssid)
543 {
544 char *value;
545
546 if (ssid->group_cipher == DEFAULT_GROUP)
547 return;
548
549 value = wpa_config_get(ssid, "group");
550 if (value == NULL)
551 return;
552 if (value[0])
553 fprintf(f, "\tgroup=%s\n", value);
554 os_free(value);
555 }
556
557
write_auth_alg(FILE * f,struct wpa_ssid * ssid)558 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
559 {
560 char *value;
561
562 if (ssid->auth_alg == 0)
563 return;
564
565 value = wpa_config_get(ssid, "auth_alg");
566 if (value == NULL)
567 return;
568 if (value[0])
569 fprintf(f, "\tauth_alg=%s\n", value);
570 os_free(value);
571 }
572
573
574 #ifdef IEEE8021X_EAPOL
write_eap(FILE * f,struct wpa_ssid * ssid)575 static void write_eap(FILE *f, struct wpa_ssid *ssid)
576 {
577 char *value;
578
579 value = wpa_config_get(ssid, "eap");
580 if (value == NULL)
581 return;
582
583 if (value[0])
584 fprintf(f, "\teap=%s\n", value);
585 os_free(value);
586 }
587 #endif /* IEEE8021X_EAPOL */
588
589
write_wep_key(FILE * f,int idx,struct wpa_ssid * ssid)590 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
591 {
592 char field[20], *value;
593 int res;
594
595 res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
596 if (res < 0 || (size_t) res >= sizeof(field))
597 return;
598 value = wpa_config_get(ssid, field);
599 if (value) {
600 fprintf(f, "\t%s=%s\n", field, value);
601 os_free(value);
602 }
603 }
604
605
606 #ifdef CONFIG_P2P
write_p2p_client_list(FILE * f,struct wpa_ssid * ssid)607 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
608 {
609 char *value = wpa_config_get(ssid, "p2p_client_list");
610 if (value == NULL)
611 return;
612 fprintf(f, "\tp2p_client_list=%s\n", value);
613 os_free(value);
614 }
615 #endif /* CONFIG_P2P */
616
617
wpa_config_write_network(FILE * f,struct wpa_ssid * ssid)618 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
619 {
620 int i;
621
622 #define STR(t) write_str(f, #t, ssid)
623 #define INT(t) write_int(f, #t, ssid->t, 0)
624 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
625 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
626 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
627
628 STR(ssid);
629 INT(scan_ssid);
630 write_bssid(f, ssid);
631 write_psk(f, ssid);
632 write_proto(f, ssid);
633 write_key_mgmt(f, ssid);
634 INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
635 write_pairwise(f, ssid);
636 write_group(f, ssid);
637 write_auth_alg(f, ssid);
638 STR(bgscan);
639 STR(autoscan);
640 #ifdef IEEE8021X_EAPOL
641 write_eap(f, ssid);
642 STR(identity);
643 STR(anonymous_identity);
644 STR(password);
645 STR(ca_cert);
646 STR(ca_path);
647 STR(client_cert);
648 STR(private_key);
649 STR(private_key_passwd);
650 STR(dh_file);
651 STR(subject_match);
652 STR(altsubject_match);
653 STR(ca_cert2);
654 STR(ca_path2);
655 STR(client_cert2);
656 STR(private_key2);
657 STR(private_key2_passwd);
658 STR(dh_file2);
659 STR(subject_match2);
660 STR(altsubject_match2);
661 STR(phase1);
662 STR(phase2);
663 STR(pcsc);
664 STR(pin);
665 STR(engine_id);
666 STR(key_id);
667 STR(cert_id);
668 STR(ca_cert_id);
669 STR(key2_id);
670 STR(pin2);
671 STR(engine2_id);
672 STR(cert2_id);
673 STR(ca_cert2_id);
674 INTe(engine);
675 INTe(engine2);
676 INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
677 #endif /* IEEE8021X_EAPOL */
678 for (i = 0; i < 4; i++)
679 write_wep_key(f, i, ssid);
680 INT(wep_tx_keyidx);
681 INT(priority);
682 #ifdef IEEE8021X_EAPOL
683 INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
684 STR(pac_file);
685 INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
686 #endif /* IEEE8021X_EAPOL */
687 INT(mode);
688 INT(frequency);
689 write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
690 INT(disabled);
691 INT(peerkey);
692 #ifdef CONFIG_IEEE80211W
693 write_int(f, "ieee80211w", ssid->ieee80211w,
694 MGMT_FRAME_PROTECTION_DEFAULT);
695 #endif /* CONFIG_IEEE80211W */
696 STR(id_str);
697 #ifdef CONFIG_P2P
698 write_p2p_client_list(f, ssid);
699 #endif /* CONFIG_P2P */
700 INT(dtim_period);
701 INT(beacon_int);
702
703 #undef STR
704 #undef INT
705 #undef INT_DEF
706 }
707
708
wpa_config_write_cred(FILE * f,struct wpa_cred * cred)709 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
710 {
711 if (cred->priority)
712 fprintf(f, "\tpriority=%d\n", cred->priority);
713 if (cred->pcsc)
714 fprintf(f, "\tpcsc=%d\n", cred->pcsc);
715 if (cred->realm)
716 fprintf(f, "\trealm=\"%s\"\n", cred->realm);
717 if (cred->username)
718 fprintf(f, "\tusername=\"%s\"\n", cred->username);
719 if (cred->password && cred->ext_password)
720 fprintf(f, "\tpassword=ext:%s\n", cred->password);
721 else if (cred->password)
722 fprintf(f, "\tpassword=\"%s\"\n", cred->password);
723 if (cred->ca_cert)
724 fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
725 if (cred->client_cert)
726 fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
727 if (cred->private_key)
728 fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
729 if (cred->private_key_passwd)
730 fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
731 cred->private_key_passwd);
732 if (cred->imsi)
733 fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
734 if (cred->milenage)
735 fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
736 if (cred->domain)
737 fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
738 if (cred->roaming_consortium_len) {
739 size_t i;
740 fprintf(f, "\troaming_consortium=");
741 for (i = 0; i < cred->roaming_consortium_len; i++)
742 fprintf(f, "%02x", cred->roaming_consortium[i]);
743 fprintf(f, "\n");
744 }
745 if (cred->eap_method) {
746 const char *name;
747 name = eap_get_name(cred->eap_method[0].vendor,
748 cred->eap_method[0].method);
749 fprintf(f, "\teap=%s\n", name);
750 }
751 if (cred->phase1)
752 fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
753 if (cred->phase2)
754 fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
755 if (cred->excluded_ssid) {
756 size_t i, j;
757 for (i = 0; i < cred->num_excluded_ssid; i++) {
758 struct excluded_ssid *e = &cred->excluded_ssid[i];
759 fprintf(f, "\texcluded_ssid=");
760 for (j = 0; j < e->ssid_len; j++)
761 fprintf(f, "%02x", e->ssid[j]);
762 fprintf(f, "\n");
763 }
764 }
765 }
766
767
768 #ifndef CONFIG_NO_CONFIG_BLOBS
wpa_config_write_blob(FILE * f,struct wpa_config_blob * blob)769 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
770 {
771 unsigned char *encoded;
772
773 encoded = base64_encode(blob->data, blob->len, NULL);
774 if (encoded == NULL)
775 return -1;
776
777 fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
778 os_free(encoded);
779 return 0;
780 }
781 #endif /* CONFIG_NO_CONFIG_BLOBS */
782
783
write_global_bin(FILE * f,const char * field,const struct wpabuf * val)784 static void write_global_bin(FILE *f, const char *field,
785 const struct wpabuf *val)
786 {
787 size_t i;
788 const u8 *pos;
789
790 if (val == NULL)
791 return;
792
793 fprintf(f, "%s=", field);
794 pos = wpabuf_head(val);
795 for (i = 0; i < wpabuf_len(val); i++)
796 fprintf(f, "%02X", *pos++);
797 fprintf(f, "\n");
798 }
799
800
wpa_config_write_global(FILE * f,struct wpa_config * config)801 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
802 {
803 #ifdef CONFIG_CTRL_IFACE
804 if (config->ctrl_interface)
805 fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
806 if (config->ctrl_interface_group)
807 fprintf(f, "ctrl_interface_group=%s\n",
808 config->ctrl_interface_group);
809 #endif /* CONFIG_CTRL_IFACE */
810 if (config->eapol_version != DEFAULT_EAPOL_VERSION)
811 fprintf(f, "eapol_version=%d\n", config->eapol_version);
812 if (config->ap_scan != DEFAULT_AP_SCAN)
813 fprintf(f, "ap_scan=%d\n", config->ap_scan);
814 if (config->disable_scan_offload)
815 fprintf(f, "disable_scan_offload=%d\n",
816 config->disable_scan_offload);
817 if (config->fast_reauth != DEFAULT_FAST_REAUTH)
818 fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
819 if (config->opensc_engine_path)
820 fprintf(f, "opensc_engine_path=%s\n",
821 config->opensc_engine_path);
822 if (config->pkcs11_engine_path)
823 fprintf(f, "pkcs11_engine_path=%s\n",
824 config->pkcs11_engine_path);
825 if (config->pkcs11_module_path)
826 fprintf(f, "pkcs11_module_path=%s\n",
827 config->pkcs11_module_path);
828 if (config->pcsc_reader)
829 fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
830 if (config->pcsc_pin)
831 fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
832 if (config->driver_param)
833 fprintf(f, "driver_param=%s\n", config->driver_param);
834 if (config->dot11RSNAConfigPMKLifetime)
835 fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
836 config->dot11RSNAConfigPMKLifetime);
837 if (config->dot11RSNAConfigPMKReauthThreshold)
838 fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
839 config->dot11RSNAConfigPMKReauthThreshold);
840 if (config->dot11RSNAConfigSATimeout)
841 fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
842 config->dot11RSNAConfigSATimeout);
843 if (config->update_config)
844 fprintf(f, "update_config=%d\n", config->update_config);
845 #ifdef CONFIG_WPS
846 if (!is_nil_uuid(config->uuid)) {
847 char buf[40];
848 uuid_bin2str(config->uuid, buf, sizeof(buf));
849 fprintf(f, "uuid=%s\n", buf);
850 }
851 if (config->device_name)
852 fprintf(f, "device_name=%s\n", config->device_name);
853 if (config->manufacturer)
854 fprintf(f, "manufacturer=%s\n", config->manufacturer);
855 if (config->model_name)
856 fprintf(f, "model_name=%s\n", config->model_name);
857 if (config->model_number)
858 fprintf(f, "model_number=%s\n", config->model_number);
859 if (config->serial_number)
860 fprintf(f, "serial_number=%s\n", config->serial_number);
861 {
862 char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
863 buf = wps_dev_type_bin2str(config->device_type,
864 _buf, sizeof(_buf));
865 if (os_strcmp(buf, "0-00000000-0") != 0)
866 fprintf(f, "device_type=%s\n", buf);
867 }
868 if (WPA_GET_BE32(config->os_version))
869 fprintf(f, "os_version=%08x\n",
870 WPA_GET_BE32(config->os_version));
871 if (config->config_methods)
872 fprintf(f, "config_methods=%s\n", config->config_methods);
873 if (config->wps_cred_processing)
874 fprintf(f, "wps_cred_processing=%d\n",
875 config->wps_cred_processing);
876 if (config->wps_vendor_ext_m1) {
877 int i, len = wpabuf_len(config->wps_vendor_ext_m1);
878 const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
879 if (len > 0) {
880 fprintf(f, "wps_vendor_ext_m1=");
881 for (i = 0; i < len; i++)
882 fprintf(f, "%02x", *p++);
883 fprintf(f, "\n");
884 }
885 }
886 #endif /* CONFIG_WPS */
887 #ifdef CONFIG_P2P
888 if (config->p2p_listen_reg_class)
889 fprintf(f, "p2p_listen_reg_class=%u\n",
890 config->p2p_listen_reg_class);
891 if (config->p2p_listen_channel)
892 fprintf(f, "p2p_listen_channel=%u\n",
893 config->p2p_listen_channel);
894 if (config->p2p_oper_reg_class)
895 fprintf(f, "p2p_oper_reg_class=%u\n",
896 config->p2p_oper_reg_class);
897 if (config->p2p_oper_channel)
898 fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
899 if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
900 fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
901 if (config->p2p_ssid_postfix)
902 fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
903 if (config->persistent_reconnect)
904 fprintf(f, "persistent_reconnect=%u\n",
905 config->persistent_reconnect);
906 if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
907 fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
908 if (config->p2p_group_idle)
909 fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
910 if (config->p2p_pref_chan) {
911 unsigned int i;
912 fprintf(f, "p2p_pref_chan=");
913 for (i = 0; i < config->num_p2p_pref_chan; i++) {
914 fprintf(f, "%s%u:%u", i > 0 ? "," : "",
915 config->p2p_pref_chan[i].op_class,
916 config->p2p_pref_chan[i].chan);
917 }
918 fprintf(f, "\n");
919 }
920 if (config->p2p_go_ht40)
921 fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
922 if (config->p2p_disabled)
923 fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
924 if (config->p2p_no_group_iface)
925 fprintf(f, "p2p_no_group_iface=%u\n",
926 config->p2p_no_group_iface);
927 if (config->p2p_ignore_shared_freq)
928 fprintf(f, "p2p_ignore_shared_freq=%u\n",
929 config->p2p_ignore_shared_freq);
930 #endif /* CONFIG_P2P */
931 if (config->country[0] && config->country[1]) {
932 fprintf(f, "country=%c%c\n",
933 config->country[0], config->country[1]);
934 }
935 if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
936 fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
937 if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
938 fprintf(f, "bss_expiration_age=%u\n",
939 config->bss_expiration_age);
940 if (config->bss_expiration_scan_count !=
941 DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
942 fprintf(f, "bss_expiration_scan_count=%u\n",
943 config->bss_expiration_scan_count);
944 if (config->filter_ssids)
945 fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
946 if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
947 fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
948 if (config->disassoc_low_ack)
949 fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
950 #ifdef CONFIG_HS20
951 if (config->hs20)
952 fprintf(f, "hs20=1\n");
953 #endif /* CONFIG_HS20 */
954 #ifdef CONFIG_INTERWORKING
955 if (config->interworking)
956 fprintf(f, "interworking=%u\n", config->interworking);
957 if (!is_zero_ether_addr(config->hessid))
958 fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
959 if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
960 fprintf(f, "access_network_type=%d\n",
961 config->access_network_type);
962 #endif /* CONFIG_INTERWORKING */
963 if (config->pbc_in_m1)
964 fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
965 if (config->wps_nfc_pw_from_config) {
966 if (config->wps_nfc_dev_pw_id)
967 fprintf(f, "wps_nfc_dev_pw_id=%d\n",
968 config->wps_nfc_dev_pw_id);
969 write_global_bin(f, "wps_nfc_dh_pubkey",
970 config->wps_nfc_dh_pubkey);
971 write_global_bin(f, "wps_nfc_dh_privkey",
972 config->wps_nfc_dh_privkey);
973 write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
974 }
975
976 if (config->ext_password_backend)
977 fprintf(f, "ext_password_backend=%s\n",
978 config->ext_password_backend);
979 if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
980 fprintf(f, "p2p_go_max_inactivity=%d\n",
981 config->p2p_go_max_inactivity);
982 if (config->auto_interworking)
983 fprintf(f, "auto_interworking=%d\n",
984 config->auto_interworking);
985 if (config->okc)
986 fprintf(f, "okc=%d\n", config->okc);
987 if (config->pmf)
988 fprintf(f, "pmf=%d\n", config->pmf);
989 if (config->dtim_period)
990 fprintf(f, "dtim_period=%d\n", config->dtim_period);
991 if (config->beacon_int)
992 fprintf(f, "beacon_int=%d\n", config->beacon_int);
993
994 if (config->sae_groups) {
995 int i;
996 fprintf(f, "sae_groups=");
997 for (i = 0; config->sae_groups[i] >= 0; i++) {
998 fprintf(f, "%s%d", i > 0 ? " " : "",
999 config->sae_groups[i]);
1000 }
1001 fprintf(f, "\n");
1002 }
1003
1004 if (config->ap_vendor_elements) {
1005 int i, len = wpabuf_len(config->ap_vendor_elements);
1006 const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1007 if (len > 0) {
1008 fprintf(f, "ap_vendor_elements=");
1009 for (i = 0; i < len; i++)
1010 fprintf(f, "%02x", *p++);
1011 fprintf(f, "\n");
1012 }
1013 }
1014
1015 if (config->ignore_old_scan_res)
1016 fprintf(f, "ignore_old_scan_res=%d\n",
1017 config->ignore_old_scan_res);
1018 }
1019
1020 #endif /* CONFIG_NO_CONFIG_WRITE */
1021
1022
wpa_config_write(const char * name,struct wpa_config * config)1023 int wpa_config_write(const char *name, struct wpa_config *config)
1024 {
1025 #ifndef CONFIG_NO_CONFIG_WRITE
1026 FILE *f;
1027 struct wpa_ssid *ssid;
1028 struct wpa_cred *cred;
1029 #ifndef CONFIG_NO_CONFIG_BLOBS
1030 struct wpa_config_blob *blob;
1031 #endif /* CONFIG_NO_CONFIG_BLOBS */
1032 int ret = 0;
1033
1034 wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1035
1036 f = fopen(name, "w");
1037 if (f == NULL) {
1038 wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1039 return -1;
1040 }
1041
1042 wpa_config_write_global(f, config);
1043
1044 for (cred = config->cred; cred; cred = cred->next) {
1045 fprintf(f, "\ncred={\n");
1046 wpa_config_write_cred(f, cred);
1047 fprintf(f, "}\n");
1048 }
1049
1050 for (ssid = config->ssid; ssid; ssid = ssid->next) {
1051 if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1052 continue; /* do not save temporary networks */
1053 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1054 !ssid->passphrase)
1055 continue; /* do not save invalid network */
1056 fprintf(f, "\nnetwork={\n");
1057 wpa_config_write_network(f, ssid);
1058 fprintf(f, "}\n");
1059 }
1060
1061 #ifndef CONFIG_NO_CONFIG_BLOBS
1062 for (blob = config->blobs; blob; blob = blob->next) {
1063 ret = wpa_config_write_blob(f, blob);
1064 if (ret)
1065 break;
1066 }
1067 #endif /* CONFIG_NO_CONFIG_BLOBS */
1068
1069 fclose(f);
1070
1071 wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1072 name, ret ? "un" : "");
1073 return ret;
1074 #else /* CONFIG_NO_CONFIG_WRITE */
1075 return -1;
1076 #endif /* CONFIG_NO_CONFIG_WRITE */
1077 }
1078