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 
223 	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
224 		if (os_strcmp(pos, "}") == 0) {
225 			end = 1;
226 			break;
227 		}
228 
229 		pos2 = os_strchr(pos, '=');
230 		if (pos2 == NULL) {
231 			wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
232 				   "'%s'.", *line, pos);
233 			errors++;
234 			continue;
235 		}
236 
237 		*pos2++ = '\0';
238 		if (*pos2 == '"') {
239 			if (os_strchr(pos2 + 1, '"') == NULL) {
240 				wpa_printf(MSG_ERROR, "Line %d: invalid "
241 					   "quotation '%s'.", *line, pos2);
242 				errors++;
243 				continue;
244 			}
245 		}
246 
247 		if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
248 			errors++;
249 	}
250 
251 	if (!end) {
252 		wpa_printf(MSG_ERROR, "Line %d: cred block was not "
253 			   "terminated properly.", *line);
254 		errors++;
255 	}
256 
257 	if (errors) {
258 		wpa_config_free_cred(cred);
259 		cred = NULL;
260 	}
261 
262 	return cred;
263 }
264 
265 
266 #ifndef CONFIG_NO_CONFIG_BLOBS
267 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
268 						     const char *name)
269 {
270 	struct wpa_config_blob *blob;
271 	char buf[256], *pos;
272 	unsigned char *encoded = NULL, *nencoded;
273 	int end = 0;
274 	size_t encoded_len = 0, len;
275 
276 	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
277 		   *line, name);
278 
279 	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
280 		if (os_strcmp(pos, "}") == 0) {
281 			end = 1;
282 			break;
283 		}
284 
285 		len = os_strlen(pos);
286 		nencoded = os_realloc(encoded, encoded_len + len);
287 		if (nencoded == NULL) {
288 			wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
289 				   "blob", *line);
290 			os_free(encoded);
291 			return NULL;
292 		}
293 		encoded = nencoded;
294 		os_memcpy(encoded + encoded_len, pos, len);
295 		encoded_len += len;
296 	}
297 
298 	if (!end) {
299 		wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
300 			   "properly", *line);
301 		os_free(encoded);
302 		return NULL;
303 	}
304 
305 	blob = os_zalloc(sizeof(*blob));
306 	if (blob == NULL) {
307 		os_free(encoded);
308 		return NULL;
309 	}
310 	blob->name = os_strdup(name);
311 	blob->data = base64_decode(encoded, encoded_len, &blob->len);
312 	os_free(encoded);
313 
314 	if (blob->name == NULL || blob->data == NULL) {
315 		wpa_config_free_blob(blob);
316 		return NULL;
317 	}
318 
319 	return blob;
320 }
321 
322 
323 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
324 				   int *line, char *bname)
325 {
326 	char *name_end;
327 	struct wpa_config_blob *blob;
328 
329 	name_end = os_strchr(bname, '=');
330 	if (name_end == NULL) {
331 		wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
332 			   *line);
333 		return -1;
334 	}
335 	*name_end = '\0';
336 
337 	blob = wpa_config_read_blob(f, line, bname);
338 	if (blob == NULL) {
339 		wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
340 			   *line, bname);
341 		return -1;
342 	}
343 	wpa_config_set_blob(config, blob);
344 	return 0;
345 }
346 #endif /* CONFIG_NO_CONFIG_BLOBS */
347 
348 
349 struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp)
350 {
351 	FILE *f;
352 	char buf[512], *pos;
353 	int errors = 0, line = 0;
354 	struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
355 	struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
356 	struct wpa_config *config;
357 	int id = 0;
358 	int cred_id = 0;
359 
360 	if (name == NULL)
361 		return NULL;
362 	if (cfgp)
363 		config = cfgp;
364 	else
365 		config = wpa_config_alloc_empty(NULL, NULL);
366 	if (config == NULL) {
367 		wpa_printf(MSG_ERROR, "Failed to allocate config file "
368 			   "structure");
369 		return NULL;
370 	}
371 	head = config->ssid;
372 	cred_head = config->cred;
373 
374 	wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
375 	f = fopen(name, "r");
376 	if (f == NULL) {
377 		wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
378 			   "error: %s", name, strerror(errno));
379 		os_free(config);
380 		return NULL;
381 	}
382 
383 	while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
384 		if (os_strcmp(pos, "network={") == 0) {
385 			ssid = wpa_config_read_network(f, &line, id++);
386 			if (ssid == NULL) {
387 				wpa_printf(MSG_ERROR, "Line %d: failed to "
388 					   "parse network block.", line);
389 				errors++;
390 				continue;
391 			}
392 			if (head == NULL) {
393 				head = tail = ssid;
394 			} else {
395 				tail->next = ssid;
396 				tail = ssid;
397 			}
398 			if (wpa_config_add_prio_network(config, ssid)) {
399 				wpa_printf(MSG_ERROR, "Line %d: failed to add "
400 					   "network block to priority list.",
401 					   line);
402 				errors++;
403 				continue;
404 			}
405 		} else if (os_strcmp(pos, "cred={") == 0) {
406 			cred = wpa_config_read_cred(f, &line, cred_id++);
407 			if (cred == NULL) {
408 				wpa_printf(MSG_ERROR, "Line %d: failed to "
409 					   "parse cred block.", line);
410 				errors++;
411 				continue;
412 			}
413 			if (cred_head == NULL) {
414 				cred_head = cred_tail = cred;
415 			} else {
416 				cred_tail->next = cred;
417 				cred_tail = cred;
418 			}
419 #ifndef CONFIG_NO_CONFIG_BLOBS
420 		} else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
421 			if (wpa_config_process_blob(config, f, &line, pos + 12)
422 			    < 0) {
423 				wpa_printf(MSG_ERROR, "Line %d: failed to "
424 					   "process blob.", line);
425 				errors++;
426 				continue;
427 			}
428 #endif /* CONFIG_NO_CONFIG_BLOBS */
429 		} else if (wpa_config_process_global(config, pos, line) < 0) {
430 			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
431 				   "line '%s'.", line, pos);
432 			errors++;
433 			continue;
434 		}
435 	}
436 
437 	fclose(f);
438 
439 	config->ssid = head;
440 	wpa_config_debug_dump_networks(config);
441 	config->cred = cred_head;
442 
443 #ifndef WPA_IGNORE_CONFIG_ERRORS
444 	if (errors) {
445 		wpa_config_free(config);
446 		config = NULL;
447 		head = NULL;
448 	}
449 #endif /* WPA_IGNORE_CONFIG_ERRORS */
450 
451 	return config;
452 }
453 
454 
455 #ifndef CONFIG_NO_CONFIG_WRITE
456 
457 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
458 {
459 	char *value = wpa_config_get(ssid, field);
460 	if (value == NULL)
461 		return;
462 	fprintf(f, "\t%s=%s\n", field, value);
463 	os_free(value);
464 }
465 
466 
467 static void write_int(FILE *f, const char *field, int value, int def)
468 {
469 	if (value == def)
470 		return;
471 	fprintf(f, "\t%s=%d\n", field, value);
472 }
473 
474 
475 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
476 {
477 	char *value = wpa_config_get(ssid, "bssid");
478 	if (value == NULL)
479 		return;
480 	fprintf(f, "\tbssid=%s\n", value);
481 	os_free(value);
482 }
483 
484 
485 static void write_psk(FILE *f, struct wpa_ssid *ssid)
486 {
487 	char *value = wpa_config_get(ssid, "psk");
488 	if (value == NULL)
489 		return;
490 	fprintf(f, "\tpsk=%s\n", value);
491 	os_free(value);
492 }
493 
494 
495 static void write_proto(FILE *f, struct wpa_ssid *ssid)
496 {
497 	char *value;
498 
499 	if (ssid->proto == DEFAULT_PROTO)
500 		return;
501 
502 	value = wpa_config_get(ssid, "proto");
503 	if (value == NULL)
504 		return;
505 	if (value[0])
506 		fprintf(f, "\tproto=%s\n", value);
507 	os_free(value);
508 }
509 
510 
511 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
512 {
513 	char *value;
514 
515 	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
516 		return;
517 
518 	value = wpa_config_get(ssid, "key_mgmt");
519 	if (value == NULL)
520 		return;
521 	if (value[0])
522 		fprintf(f, "\tkey_mgmt=%s\n", value);
523 	os_free(value);
524 }
525 
526 
527 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
528 {
529 	char *value;
530 
531 	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
532 		return;
533 
534 	value = wpa_config_get(ssid, "pairwise");
535 	if (value == NULL)
536 		return;
537 	if (value[0])
538 		fprintf(f, "\tpairwise=%s\n", value);
539 	os_free(value);
540 }
541 
542 
543 static void write_group(FILE *f, struct wpa_ssid *ssid)
544 {
545 	char *value;
546 
547 	if (ssid->group_cipher == DEFAULT_GROUP)
548 		return;
549 
550 	value = wpa_config_get(ssid, "group");
551 	if (value == NULL)
552 		return;
553 	if (value[0])
554 		fprintf(f, "\tgroup=%s\n", value);
555 	os_free(value);
556 }
557 
558 
559 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
560 {
561 	char *value;
562 
563 	if (ssid->auth_alg == 0)
564 		return;
565 
566 	value = wpa_config_get(ssid, "auth_alg");
567 	if (value == NULL)
568 		return;
569 	if (value[0])
570 		fprintf(f, "\tauth_alg=%s\n", value);
571 	os_free(value);
572 }
573 
574 
575 #ifdef IEEE8021X_EAPOL
576 static void write_eap(FILE *f, struct wpa_ssid *ssid)
577 {
578 	char *value;
579 
580 	value = wpa_config_get(ssid, "eap");
581 	if (value == NULL)
582 		return;
583 
584 	if (value[0])
585 		fprintf(f, "\teap=%s\n", value);
586 	os_free(value);
587 }
588 #endif /* IEEE8021X_EAPOL */
589 
590 
591 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
592 {
593 	char field[20], *value;
594 	int res;
595 
596 	res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
597 	if (res < 0 || (size_t) res >= sizeof(field))
598 		return;
599 	value = wpa_config_get(ssid, field);
600 	if (value) {
601 		fprintf(f, "\t%s=%s\n", field, value);
602 		os_free(value);
603 	}
604 }
605 
606 
607 #ifdef CONFIG_P2P
608 
609 static void write_go_p2p_dev_addr(FILE *f, struct wpa_ssid *ssid)
610 {
611 	char *value = wpa_config_get(ssid, "go_p2p_dev_addr");
612 	if (value == NULL)
613 		return;
614 	fprintf(f, "\tgo_p2p_dev_addr=%s\n", value);
615 	os_free(value);
616 }
617 
618 static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
619 {
620 	char *value = wpa_config_get(ssid, "p2p_client_list");
621 	if (value == NULL)
622 		return;
623 	fprintf(f, "\tp2p_client_list=%s\n", value);
624 	os_free(value);
625 }
626 
627 
628 static void write_psk_list(FILE *f, struct wpa_ssid *ssid)
629 {
630 	struct psk_list_entry *psk;
631 	char hex[32 * 2 + 1];
632 
633 	dl_list_for_each(psk, &ssid->psk_list, struct psk_list_entry, list) {
634 		wpa_snprintf_hex(hex, sizeof(hex), psk->psk, sizeof(psk->psk));
635 		fprintf(f, "\tpsk_list=%s" MACSTR "-%s\n",
636 			psk->p2p ? "P2P-" : "", MAC2STR(psk->addr), hex);
637 	}
638 }
639 
640 #endif /* CONFIG_P2P */
641 
642 
643 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
644 {
645 	int i;
646 
647 #define STR(t) write_str(f, #t, ssid)
648 #define INT(t) write_int(f, #t, ssid->t, 0)
649 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
650 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
651 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
652 
653 	STR(ssid);
654 	INT(scan_ssid);
655 	write_bssid(f, ssid);
656 	write_psk(f, ssid);
657 	write_proto(f, ssid);
658 	write_key_mgmt(f, ssid);
659 	INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
660 	write_pairwise(f, ssid);
661 	write_group(f, ssid);
662 	write_auth_alg(f, ssid);
663 	STR(bgscan);
664 	STR(autoscan);
665 	STR(scan_freq);
666 #ifdef IEEE8021X_EAPOL
667 	write_eap(f, ssid);
668 	STR(identity);
669 	STR(anonymous_identity);
670 	STR(password);
671 	STR(ca_cert);
672 	STR(ca_path);
673 	STR(client_cert);
674 	STR(private_key);
675 	STR(private_key_passwd);
676 	STR(dh_file);
677 	STR(subject_match);
678 	STR(altsubject_match);
679 	STR(domain_suffix_match);
680 	STR(ca_cert2);
681 	STR(ca_path2);
682 	STR(client_cert2);
683 	STR(private_key2);
684 	STR(private_key2_passwd);
685 	STR(dh_file2);
686 	STR(subject_match2);
687 	STR(altsubject_match2);
688 	STR(domain_suffix_match2);
689 	STR(phase1);
690 	STR(phase2);
691 	STR(pcsc);
692 	STR(pin);
693 	STR(engine_id);
694 	STR(key_id);
695 	STR(cert_id);
696 	STR(ca_cert_id);
697 	STR(key2_id);
698 	STR(pin2);
699 	STR(engine2_id);
700 	STR(cert2_id);
701 	STR(ca_cert2_id);
702 	INTe(engine);
703 	INTe(engine2);
704 	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
705 #endif /* IEEE8021X_EAPOL */
706 	for (i = 0; i < 4; i++)
707 		write_wep_key(f, i, ssid);
708 	INT(wep_tx_keyidx);
709 	INT(priority);
710 #ifdef IEEE8021X_EAPOL
711 	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
712 	STR(pac_file);
713 	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
714 #endif /* IEEE8021X_EAPOL */
715 	INT(mode);
716 	INT(frequency);
717 	write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
718 	INT(disabled);
719 	INT(peerkey);
720 #ifdef CONFIG_IEEE80211W
721 	write_int(f, "ieee80211w", ssid->ieee80211w,
722 		  MGMT_FRAME_PROTECTION_DEFAULT);
723 #endif /* CONFIG_IEEE80211W */
724 	STR(id_str);
725 #ifdef CONFIG_P2P
726 	write_go_p2p_dev_addr(f, ssid);
727 	write_p2p_client_list(f, ssid);
728 	write_psk_list(f, ssid);
729 #endif /* CONFIG_P2P */
730 	INT(dtim_period);
731 	INT(beacon_int);
732 
733 #undef STR
734 #undef INT
735 #undef INT_DEF
736 }
737 
738 
739 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
740 {
741 	size_t i;
742 
743 	if (cred->priority)
744 		fprintf(f, "\tpriority=%d\n", cred->priority);
745 	if (cred->pcsc)
746 		fprintf(f, "\tpcsc=%d\n", cred->pcsc);
747 	if (cred->realm)
748 		fprintf(f, "\trealm=\"%s\"\n", cred->realm);
749 	if (cred->username)
750 		fprintf(f, "\tusername=\"%s\"\n", cred->username);
751 	if (cred->password && cred->ext_password)
752 		fprintf(f, "\tpassword=ext:%s\n", cred->password);
753 	else if (cred->password)
754 		fprintf(f, "\tpassword=\"%s\"\n", cred->password);
755 	if (cred->ca_cert)
756 		fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
757 	if (cred->client_cert)
758 		fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
759 	if (cred->private_key)
760 		fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
761 	if (cred->private_key_passwd)
762 		fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
763 			cred->private_key_passwd);
764 	if (cred->imsi)
765 		fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
766 	if (cred->milenage)
767 		fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
768 	for (i = 0; i < cred->num_domain; i++)
769 		fprintf(f, "\tdomain=\"%s\"\n", cred->domain[i]);
770 	if (cred->domain_suffix_match)
771 		fprintf(f, "\tdomain_suffix_match=\"%s\"",
772 			cred->domain_suffix_match);
773 	if (cred->roaming_consortium_len) {
774 		fprintf(f, "\troaming_consortium=");
775 		for (i = 0; i < cred->roaming_consortium_len; i++)
776 			fprintf(f, "%02x", cred->roaming_consortium[i]);
777 		fprintf(f, "\n");
778 	}
779 	if (cred->eap_method) {
780 		const char *name;
781 		name = eap_get_name(cred->eap_method[0].vendor,
782 				    cred->eap_method[0].method);
783 		fprintf(f, "\teap=%s\n", name);
784 	}
785 	if (cred->phase1)
786 		fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
787 	if (cred->phase2)
788 		fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
789 	if (cred->excluded_ssid) {
790 		size_t j;
791 		for (i = 0; i < cred->num_excluded_ssid; i++) {
792 			struct excluded_ssid *e = &cred->excluded_ssid[i];
793 			fprintf(f, "\texcluded_ssid=");
794 			for (j = 0; j < e->ssid_len; j++)
795 				fprintf(f, "%02x", e->ssid[j]);
796 			fprintf(f, "\n");
797 		}
798 	}
799 }
800 
801 
802 #ifndef CONFIG_NO_CONFIG_BLOBS
803 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
804 {
805 	unsigned char *encoded;
806 
807 	encoded = base64_encode(blob->data, blob->len, NULL);
808 	if (encoded == NULL)
809 		return -1;
810 
811 	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
812 	os_free(encoded);
813 	return 0;
814 }
815 #endif /* CONFIG_NO_CONFIG_BLOBS */
816 
817 
818 static void write_global_bin(FILE *f, const char *field,
819 			     const struct wpabuf *val)
820 {
821 	size_t i;
822 	const u8 *pos;
823 
824 	if (val == NULL)
825 		return;
826 
827 	fprintf(f, "%s=", field);
828 	pos = wpabuf_head(val);
829 	for (i = 0; i < wpabuf_len(val); i++)
830 		fprintf(f, "%02X", *pos++);
831 	fprintf(f, "\n");
832 }
833 
834 
835 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
836 {
837 #ifdef CONFIG_CTRL_IFACE
838 	if (config->ctrl_interface)
839 		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
840 	if (config->ctrl_interface_group)
841 		fprintf(f, "ctrl_interface_group=%s\n",
842 			config->ctrl_interface_group);
843 #endif /* CONFIG_CTRL_IFACE */
844 	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
845 		fprintf(f, "eapol_version=%d\n", config->eapol_version);
846 	if (config->ap_scan != DEFAULT_AP_SCAN)
847 		fprintf(f, "ap_scan=%d\n", config->ap_scan);
848 	if (config->disable_scan_offload)
849 		fprintf(f, "disable_scan_offload=%d\n",
850 			config->disable_scan_offload);
851 	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
852 		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
853 	if (config->opensc_engine_path)
854 		fprintf(f, "opensc_engine_path=%s\n",
855 			config->opensc_engine_path);
856 	if (config->pkcs11_engine_path)
857 		fprintf(f, "pkcs11_engine_path=%s\n",
858 			config->pkcs11_engine_path);
859 	if (config->pkcs11_module_path)
860 		fprintf(f, "pkcs11_module_path=%s\n",
861 			config->pkcs11_module_path);
862 	if (config->pcsc_reader)
863 		fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
864 	if (config->pcsc_pin)
865 		fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
866 	if (config->driver_param)
867 		fprintf(f, "driver_param=%s\n", config->driver_param);
868 	if (config->dot11RSNAConfigPMKLifetime)
869 		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
870 			config->dot11RSNAConfigPMKLifetime);
871 	if (config->dot11RSNAConfigPMKReauthThreshold)
872 		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
873 			config->dot11RSNAConfigPMKReauthThreshold);
874 	if (config->dot11RSNAConfigSATimeout)
875 		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
876 			config->dot11RSNAConfigSATimeout);
877 	if (config->update_config)
878 		fprintf(f, "update_config=%d\n", config->update_config);
879 #ifdef CONFIG_WPS
880 	if (!is_nil_uuid(config->uuid)) {
881 		char buf[40];
882 		uuid_bin2str(config->uuid, buf, sizeof(buf));
883 		fprintf(f, "uuid=%s\n", buf);
884 	}
885 	if (config->device_name)
886 		fprintf(f, "device_name=%s\n", config->device_name);
887 	if (config->manufacturer)
888 		fprintf(f, "manufacturer=%s\n", config->manufacturer);
889 	if (config->model_name)
890 		fprintf(f, "model_name=%s\n", config->model_name);
891 	if (config->model_number)
892 		fprintf(f, "model_number=%s\n", config->model_number);
893 	if (config->serial_number)
894 		fprintf(f, "serial_number=%s\n", config->serial_number);
895 	{
896 		char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
897 		buf = wps_dev_type_bin2str(config->device_type,
898 					   _buf, sizeof(_buf));
899 		if (os_strcmp(buf, "0-00000000-0") != 0)
900 			fprintf(f, "device_type=%s\n", buf);
901 	}
902 	if (WPA_GET_BE32(config->os_version))
903 		fprintf(f, "os_version=%08x\n",
904 			WPA_GET_BE32(config->os_version));
905 	if (config->config_methods)
906 		fprintf(f, "config_methods=%s\n", config->config_methods);
907 	if (config->wps_cred_processing)
908 		fprintf(f, "wps_cred_processing=%d\n",
909 			config->wps_cred_processing);
910 	if (config->wps_vendor_ext_m1) {
911 		int i, len = wpabuf_len(config->wps_vendor_ext_m1);
912 		const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
913 		if (len > 0) {
914 			fprintf(f, "wps_vendor_ext_m1=");
915 			for (i = 0; i < len; i++)
916 				fprintf(f, "%02x", *p++);
917 			fprintf(f, "\n");
918 		}
919 	}
920 #endif /* CONFIG_WPS */
921 #ifdef CONFIG_P2P
922 	if (config->p2p_listen_reg_class)
923 		fprintf(f, "p2p_listen_reg_class=%u\n",
924 			config->p2p_listen_reg_class);
925 	if (config->p2p_listen_channel)
926 		fprintf(f, "p2p_listen_channel=%u\n",
927 			config->p2p_listen_channel);
928 	if (config->p2p_oper_reg_class)
929 		fprintf(f, "p2p_oper_reg_class=%u\n",
930 			config->p2p_oper_reg_class);
931 	if (config->p2p_oper_channel)
932 		fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
933 	if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
934 		fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
935 	if (config->p2p_ssid_postfix)
936 		fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
937 	if (config->persistent_reconnect)
938 		fprintf(f, "persistent_reconnect=%u\n",
939 			config->persistent_reconnect);
940 	if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
941 		fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
942 	if (config->p2p_group_idle)
943 		fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
944 	if (config->p2p_pref_chan) {
945 		unsigned int i;
946 		fprintf(f, "p2p_pref_chan=");
947 		for (i = 0; i < config->num_p2p_pref_chan; i++) {
948 			fprintf(f, "%s%u:%u", i > 0 ? "," : "",
949 				config->p2p_pref_chan[i].op_class,
950 				config->p2p_pref_chan[i].chan);
951 		}
952 		fprintf(f, "\n");
953 	}
954 	if (config->p2p_no_go_freq.num) {
955 		char *val = freq_range_list_str(&config->p2p_no_go_freq);
956 		if (val) {
957 			fprintf(f, "p2p_no_go_freq=%s\n", val);
958 			os_free(val);
959 		}
960 	}
961 	if (config->p2p_add_cli_chan)
962 		fprintf(f, "p2p_add_cli_chan=%d\n", config->p2p_add_cli_chan);
963 	if (config->p2p_go_ht40)
964 		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
965 	if (config->p2p_go_vht)
966 		fprintf(f, "p2p_go_vht=%u\n", config->p2p_go_vht);
967 	if (config->p2p_disabled)
968 		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
969 	if (config->p2p_no_group_iface)
970 		fprintf(f, "p2p_no_group_iface=%u\n",
971 			config->p2p_no_group_iface);
972 	if (config->p2p_ignore_shared_freq)
973 		fprintf(f, "p2p_ignore_shared_freq=%u\n",
974 			config->p2p_ignore_shared_freq);
975 #endif /* CONFIG_P2P */
976 	if (config->country[0] && config->country[1]) {
977 		fprintf(f, "country=%c%c\n",
978 			config->country[0], config->country[1]);
979 	}
980 	if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
981 		fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
982 	if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
983 		fprintf(f, "bss_expiration_age=%u\n",
984 			config->bss_expiration_age);
985 	if (config->bss_expiration_scan_count !=
986 	    DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
987 		fprintf(f, "bss_expiration_scan_count=%u\n",
988 			config->bss_expiration_scan_count);
989 	if (config->filter_ssids)
990 		fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
991 	if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
992 		fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
993 	if (config->disassoc_low_ack)
994 		fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
995 #ifdef CONFIG_HS20
996 	if (config->hs20)
997 		fprintf(f, "hs20=1\n");
998 #endif /* CONFIG_HS20 */
999 #ifdef CONFIG_INTERWORKING
1000 	if (config->interworking)
1001 		fprintf(f, "interworking=%u\n", config->interworking);
1002 	if (!is_zero_ether_addr(config->hessid))
1003 		fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
1004 	if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
1005 		fprintf(f, "access_network_type=%d\n",
1006 			config->access_network_type);
1007 #endif /* CONFIG_INTERWORKING */
1008 	if (config->pbc_in_m1)
1009 		fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
1010 	if (config->wps_nfc_pw_from_config) {
1011 		if (config->wps_nfc_dev_pw_id)
1012 			fprintf(f, "wps_nfc_dev_pw_id=%d\n",
1013 				config->wps_nfc_dev_pw_id);
1014 		write_global_bin(f, "wps_nfc_dh_pubkey",
1015 				 config->wps_nfc_dh_pubkey);
1016 		write_global_bin(f, "wps_nfc_dh_privkey",
1017 				 config->wps_nfc_dh_privkey);
1018 		write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
1019 	}
1020 
1021 	if (config->ext_password_backend)
1022 		fprintf(f, "ext_password_backend=%s\n",
1023 			config->ext_password_backend);
1024 	if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
1025 		fprintf(f, "p2p_go_max_inactivity=%d\n",
1026 			config->p2p_go_max_inactivity);
1027 	if (config->auto_interworking)
1028 		fprintf(f, "auto_interworking=%d\n",
1029 			config->auto_interworking);
1030 	if (config->okc)
1031 		fprintf(f, "okc=%d\n", config->okc);
1032 	if (config->pmf)
1033 		fprintf(f, "pmf=%d\n", config->pmf);
1034 	if (config->dtim_period)
1035 		fprintf(f, "dtim_period=%d\n", config->dtim_period);
1036 	if (config->beacon_int)
1037 		fprintf(f, "beacon_int=%d\n", config->beacon_int);
1038 
1039 	if (config->sae_groups) {
1040 		int i;
1041 		fprintf(f, "sae_groups=");
1042 		for (i = 0; config->sae_groups[i] >= 0; i++) {
1043 			fprintf(f, "%s%d", i > 0 ? " " : "",
1044 				config->sae_groups[i]);
1045 		}
1046 		fprintf(f, "\n");
1047 	}
1048 
1049 	if (config->ap_vendor_elements) {
1050 		int i, len = wpabuf_len(config->ap_vendor_elements);
1051 		const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1052 		if (len > 0) {
1053 			fprintf(f, "ap_vendor_elements=");
1054 			for (i = 0; i < len; i++)
1055 				fprintf(f, "%02x", *p++);
1056 			fprintf(f, "\n");
1057 		}
1058 	}
1059 
1060 	if (config->ignore_old_scan_res)
1061 		fprintf(f, "ignore_old_scan_res=%d\n",
1062 			config->ignore_old_scan_res);
1063 
1064 	if (config->freq_list && config->freq_list[0]) {
1065 		int i;
1066 		fprintf(f, "freq_list=");
1067 		for (i = 0; config->freq_list[i]; i++) {
1068 			fprintf(f, "%s%u", i > 0 ? " " : "",
1069 				config->freq_list[i]);
1070 		}
1071 		fprintf(f, "\n");
1072 	}
1073 	if (config->scan_cur_freq != DEFAULT_SCAN_CUR_FREQ)
1074 		fprintf(f, "scan_cur_freq=%d\n", config->scan_cur_freq);
1075 
1076 	if (config->sched_scan_interval)
1077 		fprintf(f, "sched_scan_interval=%u\n",
1078 			config->sched_scan_interval);
1079 
1080 	if (config->external_sim)
1081 		fprintf(f, "external_sim=%d\n", config->external_sim);
1082 
1083 	if (config->tdls_external_control)
1084 		fprintf(f, "tdls_external_control=%d\n",
1085 			config->tdls_external_control);
1086 }
1087 
1088 #endif /* CONFIG_NO_CONFIG_WRITE */
1089 
1090 
1091 int wpa_config_write(const char *name, struct wpa_config *config)
1092 {
1093 #ifndef CONFIG_NO_CONFIG_WRITE
1094 	FILE *f;
1095 	struct wpa_ssid *ssid;
1096 	struct wpa_cred *cred;
1097 #ifndef CONFIG_NO_CONFIG_BLOBS
1098 	struct wpa_config_blob *blob;
1099 #endif /* CONFIG_NO_CONFIG_BLOBS */
1100 	int ret = 0;
1101 
1102 	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1103 
1104 	f = fopen(name, "w");
1105 	if (f == NULL) {
1106 		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1107 		return -1;
1108 	}
1109 
1110 	wpa_config_write_global(f, config);
1111 
1112 	for (cred = config->cred; cred; cred = cred->next) {
1113 		if (cred->temporary)
1114 			continue;
1115 		fprintf(f, "\ncred={\n");
1116 		wpa_config_write_cred(f, cred);
1117 		fprintf(f, "}\n");
1118 	}
1119 
1120 	for (ssid = config->ssid; ssid; ssid = ssid->next) {
1121 		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1122 			continue; /* do not save temporary networks */
1123 		if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1124 		    !ssid->passphrase)
1125 			continue; /* do not save invalid network */
1126 		fprintf(f, "\nnetwork={\n");
1127 		wpa_config_write_network(f, ssid);
1128 		fprintf(f, "}\n");
1129 	}
1130 
1131 #ifndef CONFIG_NO_CONFIG_BLOBS
1132 	for (blob = config->blobs; blob; blob = blob->next) {
1133 		ret = wpa_config_write_blob(f, blob);
1134 		if (ret)
1135 			break;
1136 	}
1137 #endif /* CONFIG_NO_CONFIG_BLOBS */
1138 
1139 	fclose(f);
1140 
1141 	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1142 		   name, ret ? "un" : "");
1143 	return ret;
1144 #else /* CONFIG_NO_CONFIG_WRITE */
1145 	return -1;
1146 #endif /* CONFIG_NO_CONFIG_WRITE */
1147 }
1148