config_file.c revision 09f57babfc1e4473db20ced4f58a4c9f082c8ed8 
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
24static 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
36static 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 */
61static 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
123static 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
150static 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
211static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
212{
213	struct wpa_cred *cred;
214	int errors = 0, end = 0;
215	char buf[256], *pos, *pos2;
216
217	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
218	cred = os_zalloc(sizeof(*cred));
219	if (cred == NULL)
220		return NULL;
221	cred->id = id;
222	cred->sim_num = DEFAULT_USER_SELECTED_SIM;
223
224	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
225		if (os_strcmp(pos, "}") == 0) {
226			end = 1;
227			break;
228		}
229
230		pos2 = os_strchr(pos, '=');
231		if (pos2 == NULL) {
232			wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
233				   "'%s'.", *line, pos);
234			errors++;
235			continue;
236		}
237
238		*pos2++ = '\0';
239		if (*pos2 == '"') {
240			if (os_strchr(pos2 + 1, '"') == NULL) {
241				wpa_printf(MSG_ERROR, "Line %d: invalid "
242					   "quotation '%s'.", *line, pos2);
243				errors++;
244				continue;
245			}
246		}
247
248		if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
249			errors++;
250	}
251
252	if (!end) {
253		wpa_printf(MSG_ERROR, "Line %d: cred block was not "
254			   "terminated properly.", *line);
255		errors++;
256	}
257
258	if (errors) {
259		wpa_config_free_cred(cred);
260		cred = NULL;
261	}
262
263	return cred;
264}
265
266
267#ifndef CONFIG_NO_CONFIG_BLOBS
268static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
269						     const char *name)
270{
271	struct wpa_config_blob *blob;
272	char buf[256], *pos;
273	unsigned char *encoded = NULL, *nencoded;
274	int end = 0;
275	size_t encoded_len = 0, len;
276
277	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
278		   *line, name);
279
280	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
281		if (os_strcmp(pos, "}") == 0) {
282			end = 1;
283			break;
284		}
285
286		len = os_strlen(pos);
287		nencoded = os_realloc(encoded, encoded_len + len);
288		if (nencoded == NULL) {
289			wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
290				   "blob", *line);
291			os_free(encoded);
292			return NULL;
293		}
294		encoded = nencoded;
295		os_memcpy(encoded + encoded_len, pos, len);
296		encoded_len += len;
297	}
298
299	if (!end) {
300		wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
301			   "properly", *line);
302		os_free(encoded);
303		return NULL;
304	}
305
306	blob = os_zalloc(sizeof(*blob));
307	if (blob == NULL) {
308		os_free(encoded);
309		return NULL;
310	}
311	blob->name = os_strdup(name);
312	blob->data = base64_decode(encoded, encoded_len, &blob->len);
313	os_free(encoded);
314
315	if (blob->name == NULL || blob->data == NULL) {
316		wpa_config_free_blob(blob);
317		return NULL;
318	}
319
320	return blob;
321}
322
323
324static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
325				   int *line, char *bname)
326{
327	char *name_end;
328	struct wpa_config_blob *blob;
329
330	name_end = os_strchr(bname, '=');
331	if (name_end == NULL) {
332		wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
333			   *line);
334		return -1;
335	}
336	*name_end = '\0';
337
338	blob = wpa_config_read_blob(f, line, bname);
339	if (blob == NULL) {
340		wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
341			   *line, bname);
342		return -1;
343	}
344	wpa_config_set_blob(config, blob);
345	return 0;
346}
347#endif /* CONFIG_NO_CONFIG_BLOBS */
348
349
350struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp)
351{
352	FILE *f;
353	char buf[512], *pos;
354	int errors = 0, line = 0;
355	struct wpa_ssid *ssid, *tail, *head;
356	struct wpa_cred *cred, *cred_tail, *cred_head;
357	struct wpa_config *config;
358	int id = 0;
359	int cred_id = 0;
360
361	if (name == NULL)
362		return NULL;
363	if (cfgp)
364		config = cfgp;
365	else
366		config = wpa_config_alloc_empty(NULL, NULL);
367	if (config == NULL) {
368		wpa_printf(MSG_ERROR, "Failed to allocate config file "
369			   "structure");
370		return NULL;
371	}
372	tail = head = config->ssid;
373	while (tail && tail->next)
374		tail = tail->next;
375	cred_tail = cred_head = config->cred;
376	while (cred_tail && cred_tail->next)
377		cred_tail = cred_tail->next;
378
379	wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
380	f = fopen(name, "r");
381	if (f == NULL) {
382		wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
383			   "error: %s", name, strerror(errno));
384		os_free(config);
385		return NULL;
386	}
387
388	while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
389		if (os_strcmp(pos, "network={") == 0) {
390			ssid = wpa_config_read_network(f, &line, id++);
391			if (ssid == NULL) {
392				wpa_printf(MSG_ERROR, "Line %d: failed to "
393					   "parse network block.", line);
394				errors++;
395				continue;
396			}
397			if (head == NULL) {
398				head = tail = ssid;
399			} else {
400				tail->next = ssid;
401				tail = ssid;
402			}
403			if (wpa_config_add_prio_network(config, ssid)) {
404				wpa_printf(MSG_ERROR, "Line %d: failed to add "
405					   "network block to priority list.",
406					   line);
407				errors++;
408				continue;
409			}
410		} else if (os_strcmp(pos, "cred={") == 0) {
411			cred = wpa_config_read_cred(f, &line, cred_id++);
412			if (cred == NULL) {
413				wpa_printf(MSG_ERROR, "Line %d: failed to "
414					   "parse cred block.", line);
415				errors++;
416				continue;
417			}
418			if (cred_head == NULL) {
419				cred_head = cred_tail = cred;
420			} else {
421				cred_tail->next = cred;
422				cred_tail = cred;
423			}
424#ifndef CONFIG_NO_CONFIG_BLOBS
425		} else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
426			if (wpa_config_process_blob(config, f, &line, pos + 12)
427			    < 0) {
428				wpa_printf(MSG_ERROR, "Line %d: failed to "
429					   "process blob.", line);
430				errors++;
431				continue;
432			}
433#endif /* CONFIG_NO_CONFIG_BLOBS */
434		} else if (wpa_config_process_global(config, pos, line) < 0) {
435			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
436				   "line '%s'.", line, pos);
437			errors++;
438			continue;
439		}
440	}
441
442	fclose(f);
443
444	config->ssid = head;
445	wpa_config_debug_dump_networks(config);
446	config->cred = cred_head;
447
448#ifndef WPA_IGNORE_CONFIG_ERRORS
449	if (errors) {
450		wpa_config_free(config);
451		config = NULL;
452		head = NULL;
453	}
454#endif /* WPA_IGNORE_CONFIG_ERRORS */
455
456	return config;
457}
458
459
460#ifndef CONFIG_NO_CONFIG_WRITE
461
462static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
463{
464	char *value = wpa_config_get(ssid, field);
465	if (value == NULL)
466		return;
467	fprintf(f, "\t%s=%s\n", field, value);
468	os_free(value);
469}
470
471
472static void write_int(FILE *f, const char *field, int value, int def)
473{
474	if (value == def)
475		return;
476	fprintf(f, "\t%s=%d\n", field, value);
477}
478
479
480static void write_bssid(FILE *f, struct wpa_ssid *ssid)
481{
482	char *value = wpa_config_get(ssid, "bssid");
483	if (value == NULL)
484		return;
485	fprintf(f, "\tbssid=%s\n", value);
486	os_free(value);
487}
488
489
490static void write_psk(FILE *f, struct wpa_ssid *ssid)
491{
492	char *value = wpa_config_get(ssid, "psk");
493	if (value == NULL)
494		return;
495	fprintf(f, "\tpsk=%s\n", value);
496	os_free(value);
497}
498
499
500static void write_proto(FILE *f, struct wpa_ssid *ssid)
501{
502	char *value;
503
504	if (ssid->proto == DEFAULT_PROTO)
505		return;
506
507	value = wpa_config_get(ssid, "proto");
508	if (value == NULL)
509		return;
510	if (value[0])
511		fprintf(f, "\tproto=%s\n", value);
512	os_free(value);
513}
514
515
516static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
517{
518	char *value;
519
520	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
521		return;
522
523	value = wpa_config_get(ssid, "key_mgmt");
524	if (value == NULL)
525		return;
526	if (value[0])
527		fprintf(f, "\tkey_mgmt=%s\n", value);
528	os_free(value);
529}
530
531
532static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
533{
534	char *value;
535
536	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
537		return;
538
539	value = wpa_config_get(ssid, "pairwise");
540	if (value == NULL)
541		return;
542	if (value[0])
543		fprintf(f, "\tpairwise=%s\n", value);
544	os_free(value);
545}
546
547
548static void write_group(FILE *f, struct wpa_ssid *ssid)
549{
550	char *value;
551
552	if (ssid->group_cipher == DEFAULT_GROUP)
553		return;
554
555	value = wpa_config_get(ssid, "group");
556	if (value == NULL)
557		return;
558	if (value[0])
559		fprintf(f, "\tgroup=%s\n", value);
560	os_free(value);
561}
562
563
564static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
565{
566	char *value;
567
568	if (ssid->auth_alg == 0)
569		return;
570
571	value = wpa_config_get(ssid, "auth_alg");
572	if (value == NULL)
573		return;
574	if (value[0])
575		fprintf(f, "\tauth_alg=%s\n", value);
576	os_free(value);
577}
578
579
580#ifdef IEEE8021X_EAPOL
581static void write_eap(FILE *f, struct wpa_ssid *ssid)
582{
583	char *value;
584
585	value = wpa_config_get(ssid, "eap");
586	if (value == NULL)
587		return;
588
589	if (value[0])
590		fprintf(f, "\teap=%s\n", value);
591	os_free(value);
592}
593#endif /* IEEE8021X_EAPOL */
594
595
596static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
597{
598	char field[20], *value;
599	int res;
600
601	res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
602	if (res < 0 || (size_t) res >= sizeof(field))
603		return;
604	value = wpa_config_get(ssid, field);
605	if (value) {
606		fprintf(f, "\t%s=%s\n", field, value);
607		os_free(value);
608	}
609}
610
611
612#ifdef CONFIG_P2P
613
614static void write_go_p2p_dev_addr(FILE *f, struct wpa_ssid *ssid)
615{
616	char *value = wpa_config_get(ssid, "go_p2p_dev_addr");
617	if (value == NULL)
618		return;
619	fprintf(f, "\tgo_p2p_dev_addr=%s\n", value);
620	os_free(value);
621}
622
623static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
624{
625	char *value = wpa_config_get(ssid, "p2p_client_list");
626	if (value == NULL)
627		return;
628	fprintf(f, "\tp2p_client_list=%s\n", value);
629	os_free(value);
630}
631
632
633static void write_psk_list(FILE *f, struct wpa_ssid *ssid)
634{
635	struct psk_list_entry *psk;
636	char hex[32 * 2 + 1];
637
638	dl_list_for_each(psk, &ssid->psk_list, struct psk_list_entry, list) {
639		wpa_snprintf_hex(hex, sizeof(hex), psk->psk, sizeof(psk->psk));
640		fprintf(f, "\tpsk_list=%s" MACSTR "-%s\n",
641			psk->p2p ? "P2P-" : "", MAC2STR(psk->addr), hex);
642	}
643}
644
645#endif /* CONFIG_P2P */
646
647
648static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
649{
650	int i;
651
652#define STR(t) write_str(f, #t, ssid)
653#define INT(t) write_int(f, #t, ssid->t, 0)
654#define INTe(t) write_int(f, #t, ssid->eap.t, 0)
655#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
656#define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
657
658	STR(ssid);
659	INT(scan_ssid);
660	write_bssid(f, ssid);
661	write_psk(f, ssid);
662	write_proto(f, ssid);
663	write_key_mgmt(f, ssid);
664	INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
665	write_pairwise(f, ssid);
666	write_group(f, ssid);
667	write_auth_alg(f, ssid);
668	STR(bgscan);
669	STR(autoscan);
670	STR(scan_freq);
671#ifdef IEEE8021X_EAPOL
672	write_eap(f, ssid);
673	STR(identity);
674	STR(anonymous_identity);
675	STR(password);
676	STR(ca_cert);
677	STR(ca_path);
678	STR(client_cert);
679	STR(private_key);
680	STR(private_key_passwd);
681	STR(dh_file);
682	STR(subject_match);
683	STR(altsubject_match);
684	STR(domain_suffix_match);
685	STR(ca_cert2);
686	STR(ca_path2);
687	STR(client_cert2);
688	STR(private_key2);
689	STR(private_key2_passwd);
690	STR(dh_file2);
691	STR(subject_match2);
692	STR(altsubject_match2);
693	STR(domain_suffix_match2);
694	STR(phase1);
695	STR(phase2);
696	STR(pcsc);
697	STR(pin);
698	STR(engine_id);
699	STR(key_id);
700	STR(cert_id);
701	STR(ca_cert_id);
702	STR(key2_id);
703	STR(pin2);
704	STR(engine2_id);
705	STR(cert2_id);
706	STR(ca_cert2_id);
707	INTe(engine);
708	INTe(engine2);
709	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
710#endif /* IEEE8021X_EAPOL */
711	for (i = 0; i < 4; i++)
712		write_wep_key(f, i, ssid);
713	INT(wep_tx_keyidx);
714	INT(priority);
715#ifdef IEEE8021X_EAPOL
716	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
717	STR(pac_file);
718	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
719	INTe(ocsp);
720	INT_DEFe(sim_num, DEFAULT_USER_SELECTED_SIM);
721#endif /* IEEE8021X_EAPOL */
722	INT(mode);
723	INT(frequency);
724	write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
725	INT(disabled);
726	INT(peerkey);
727#ifdef CONFIG_IEEE80211W
728	write_int(f, "ieee80211w", ssid->ieee80211w,
729		  MGMT_FRAME_PROTECTION_DEFAULT);
730#endif /* CONFIG_IEEE80211W */
731	STR(id_str);
732#ifdef CONFIG_P2P
733	write_go_p2p_dev_addr(f, ssid);
734	write_p2p_client_list(f, ssid);
735	write_psk_list(f, ssid);
736#endif /* CONFIG_P2P */
737	INT(dtim_period);
738	INT(beacon_int);
739#ifdef CONFIG_MACSEC
740	INT(macsec_policy);
741#endif /* CONFIG_MACSEC */
742
743#undef STR
744#undef INT
745#undef INT_DEF
746}
747
748
749static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
750{
751	size_t i;
752
753	if (cred->priority)
754		fprintf(f, "\tpriority=%d\n", cred->priority);
755	if (cred->pcsc)
756		fprintf(f, "\tpcsc=%d\n", cred->pcsc);
757	if (cred->realm)
758		fprintf(f, "\trealm=\"%s\"\n", cred->realm);
759	if (cred->username)
760		fprintf(f, "\tusername=\"%s\"\n", cred->username);
761	if (cred->password && cred->ext_password)
762		fprintf(f, "\tpassword=ext:%s\n", cred->password);
763	else if (cred->password)
764		fprintf(f, "\tpassword=\"%s\"\n", cred->password);
765	if (cred->ca_cert)
766		fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
767	if (cred->client_cert)
768		fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
769	if (cred->private_key)
770		fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
771	if (cred->private_key_passwd)
772		fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
773			cred->private_key_passwd);
774	if (cred->imsi)
775		fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
776	if (cred->milenage)
777		fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
778	for (i = 0; i < cred->num_domain; i++)
779		fprintf(f, "\tdomain=\"%s\"\n", cred->domain[i]);
780	if (cred->domain_suffix_match)
781		fprintf(f, "\tdomain_suffix_match=\"%s\"\n",
782			cred->domain_suffix_match);
783	if (cred->roaming_consortium_len) {
784		fprintf(f, "\troaming_consortium=");
785		for (i = 0; i < cred->roaming_consortium_len; i++)
786			fprintf(f, "%02x", cred->roaming_consortium[i]);
787		fprintf(f, "\n");
788	}
789	if (cred->eap_method) {
790		const char *name;
791		name = eap_get_name(cred->eap_method[0].vendor,
792				    cred->eap_method[0].method);
793		if (name)
794			fprintf(f, "\teap=%s\n", name);
795	}
796	if (cred->phase1)
797		fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
798	if (cred->phase2)
799		fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
800	if (cred->excluded_ssid) {
801		size_t j;
802		for (i = 0; i < cred->num_excluded_ssid; i++) {
803			struct excluded_ssid *e = &cred->excluded_ssid[i];
804			fprintf(f, "\texcluded_ssid=");
805			for (j = 0; j < e->ssid_len; j++)
806				fprintf(f, "%02x", e->ssid[j]);
807			fprintf(f, "\n");
808		}
809	}
810	if (cred->roaming_partner) {
811		for (i = 0; i < cred->num_roaming_partner; i++) {
812			struct roaming_partner *p = &cred->roaming_partner[i];
813			fprintf(f, "\troaming_partner=\"%s,%d,%u,%s\"\n",
814				p->fqdn, p->exact_match, p->priority,
815				p->country);
816		}
817	}
818	if (cred->update_identifier)
819		fprintf(f, "\tupdate_identifier=%d\n", cred->update_identifier);
820
821	if (cred->provisioning_sp)
822		fprintf(f, "\tprovisioning_sp=\"%s\"\n", cred->provisioning_sp);
823	if (cred->sp_priority)
824		fprintf(f, "\tsp_priority=%d\n", cred->sp_priority);
825
826	if (cred->min_dl_bandwidth_home)
827		fprintf(f, "\tmin_dl_bandwidth_home=%u\n",
828			cred->min_dl_bandwidth_home);
829	if (cred->min_ul_bandwidth_home)
830		fprintf(f, "\tmin_ul_bandwidth_home=%u\n",
831			cred->min_ul_bandwidth_home);
832	if (cred->min_dl_bandwidth_roaming)
833		fprintf(f, "\tmin_dl_bandwidth_roaming=%u\n",
834			cred->min_dl_bandwidth_roaming);
835	if (cred->min_ul_bandwidth_roaming)
836		fprintf(f, "\tmin_ul_bandwidth_roaming=%u\n",
837			cred->min_ul_bandwidth_roaming);
838
839	if (cred->max_bss_load)
840		fprintf(f, "\tmax_bss_load=%u\n",
841			cred->max_bss_load);
842
843	if (cred->ocsp)
844		fprintf(f, "\tocsp=%d\n", cred->ocsp);
845
846	if (cred->num_req_conn_capab) {
847		for (i = 0; i < cred->num_req_conn_capab; i++) {
848			int *ports;
849
850			fprintf(f, "\treq_conn_capab=%u",
851				cred->req_conn_capab_proto[i]);
852			ports = cred->req_conn_capab_port[i];
853			if (ports) {
854				int j;
855				for (j = 0; ports[j] != -1; j++) {
856					fprintf(f, "%s%d", j > 0 ? "," : ":",
857						ports[j]);
858				}
859			}
860			fprintf(f, "\n");
861		}
862	}
863
864	if (cred->required_roaming_consortium_len) {
865		fprintf(f, "\trequired_roaming_consortium=");
866		for (i = 0; i < cred->required_roaming_consortium_len; i++)
867			fprintf(f, "%02x",
868				cred->required_roaming_consortium[i]);
869		fprintf(f, "\n");
870	}
871
872	if (cred->sim_num != DEFAULT_USER_SELECTED_SIM)
873		fprintf(f, "\tsim_num=%d\n", cred->sim_num);
874}
875
876
877#ifndef CONFIG_NO_CONFIG_BLOBS
878static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
879{
880	unsigned char *encoded;
881
882	encoded = base64_encode(blob->data, blob->len, NULL);
883	if (encoded == NULL)
884		return -1;
885
886	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
887	os_free(encoded);
888	return 0;
889}
890#endif /* CONFIG_NO_CONFIG_BLOBS */
891
892
893static void write_global_bin(FILE *f, const char *field,
894			     const struct wpabuf *val)
895{
896	size_t i;
897	const u8 *pos;
898
899	if (val == NULL)
900		return;
901
902	fprintf(f, "%s=", field);
903	pos = wpabuf_head(val);
904	for (i = 0; i < wpabuf_len(val); i++)
905		fprintf(f, "%02X", *pos++);
906	fprintf(f, "\n");
907}
908
909
910static void wpa_config_write_global(FILE *f, struct wpa_config *config)
911{
912#ifdef CONFIG_CTRL_IFACE
913	if (config->ctrl_interface)
914		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
915	if (config->ctrl_interface_group)
916		fprintf(f, "ctrl_interface_group=%s\n",
917			config->ctrl_interface_group);
918#endif /* CONFIG_CTRL_IFACE */
919	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
920		fprintf(f, "eapol_version=%d\n", config->eapol_version);
921	if (config->ap_scan != DEFAULT_AP_SCAN)
922		fprintf(f, "ap_scan=%d\n", config->ap_scan);
923	if (config->disable_scan_offload)
924		fprintf(f, "disable_scan_offload=%d\n",
925			config->disable_scan_offload);
926	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
927		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
928	if (config->opensc_engine_path)
929		fprintf(f, "opensc_engine_path=%s\n",
930			config->opensc_engine_path);
931	if (config->pkcs11_engine_path)
932		fprintf(f, "pkcs11_engine_path=%s\n",
933			config->pkcs11_engine_path);
934	if (config->pkcs11_module_path)
935		fprintf(f, "pkcs11_module_path=%s\n",
936			config->pkcs11_module_path);
937	if (config->pcsc_reader)
938		fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
939	if (config->pcsc_pin)
940		fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
941	if (config->driver_param)
942		fprintf(f, "driver_param=%s\n", config->driver_param);
943	if (config->dot11RSNAConfigPMKLifetime)
944		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
945			config->dot11RSNAConfigPMKLifetime);
946	if (config->dot11RSNAConfigPMKReauthThreshold)
947		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
948			config->dot11RSNAConfigPMKReauthThreshold);
949	if (config->dot11RSNAConfigSATimeout)
950		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
951			config->dot11RSNAConfigSATimeout);
952	if (config->update_config)
953		fprintf(f, "update_config=%d\n", config->update_config);
954#ifdef CONFIG_WPS
955	if (!is_nil_uuid(config->uuid)) {
956		char buf[40];
957		uuid_bin2str(config->uuid, buf, sizeof(buf));
958		fprintf(f, "uuid=%s\n", buf);
959	}
960	if (config->device_name)
961		fprintf(f, "device_name=%s\n", config->device_name);
962	if (config->manufacturer)
963		fprintf(f, "manufacturer=%s\n", config->manufacturer);
964	if (config->model_name)
965		fprintf(f, "model_name=%s\n", config->model_name);
966	if (config->model_number)
967		fprintf(f, "model_number=%s\n", config->model_number);
968	if (config->serial_number)
969		fprintf(f, "serial_number=%s\n", config->serial_number);
970	{
971		char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
972		buf = wps_dev_type_bin2str(config->device_type,
973					   _buf, sizeof(_buf));
974		if (os_strcmp(buf, "0-00000000-0") != 0)
975			fprintf(f, "device_type=%s\n", buf);
976	}
977	if (WPA_GET_BE32(config->os_version))
978		fprintf(f, "os_version=%08x\n",
979			WPA_GET_BE32(config->os_version));
980	if (config->config_methods)
981		fprintf(f, "config_methods=%s\n", config->config_methods);
982	if (config->wps_cred_processing)
983		fprintf(f, "wps_cred_processing=%d\n",
984			config->wps_cred_processing);
985	if (config->wps_vendor_ext_m1) {
986		int i, len = wpabuf_len(config->wps_vendor_ext_m1);
987		const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
988		if (len > 0) {
989			fprintf(f, "wps_vendor_ext_m1=");
990			for (i = 0; i < len; i++)
991				fprintf(f, "%02x", *p++);
992			fprintf(f, "\n");
993		}
994	}
995#endif /* CONFIG_WPS */
996#ifdef CONFIG_P2P
997	if (config->p2p_listen_reg_class)
998		fprintf(f, "p2p_listen_reg_class=%u\n",
999			config->p2p_listen_reg_class);
1000	if (config->p2p_listen_channel)
1001		fprintf(f, "p2p_listen_channel=%u\n",
1002			config->p2p_listen_channel);
1003	if (config->p2p_oper_reg_class)
1004		fprintf(f, "p2p_oper_reg_class=%u\n",
1005			config->p2p_oper_reg_class);
1006	if (config->p2p_oper_channel)
1007		fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
1008	if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
1009		fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
1010	if (config->p2p_ssid_postfix)
1011		fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
1012	if (config->persistent_reconnect)
1013		fprintf(f, "persistent_reconnect=%u\n",
1014			config->persistent_reconnect);
1015	if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
1016		fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
1017	if (config->p2p_group_idle)
1018		fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
1019	if (config->p2p_pref_chan) {
1020		unsigned int i;
1021		fprintf(f, "p2p_pref_chan=");
1022		for (i = 0; i < config->num_p2p_pref_chan; i++) {
1023			fprintf(f, "%s%u:%u", i > 0 ? "," : "",
1024				config->p2p_pref_chan[i].op_class,
1025				config->p2p_pref_chan[i].chan);
1026		}
1027		fprintf(f, "\n");
1028	}
1029	if (config->p2p_no_go_freq.num) {
1030		char *val = freq_range_list_str(&config->p2p_no_go_freq);
1031		if (val) {
1032			fprintf(f, "p2p_no_go_freq=%s\n", val);
1033			os_free(val);
1034		}
1035	}
1036	if (config->p2p_add_cli_chan)
1037		fprintf(f, "p2p_add_cli_chan=%d\n", config->p2p_add_cli_chan);
1038	if (config->p2p_go_ht40)
1039		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
1040	if (config->p2p_go_vht)
1041		fprintf(f, "p2p_go_vht=%u\n", config->p2p_go_vht);
1042	if (config->p2p_disabled)
1043		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
1044	if (config->p2p_no_group_iface)
1045		fprintf(f, "p2p_no_group_iface=%u\n",
1046			config->p2p_no_group_iface);
1047	if (config->p2p_ignore_shared_freq)
1048		fprintf(f, "p2p_ignore_shared_freq=%u\n",
1049			config->p2p_ignore_shared_freq);
1050#endif /* CONFIG_P2P */
1051	if (config->country[0] && config->country[1]) {
1052		fprintf(f, "country=%c%c\n",
1053			config->country[0], config->country[1]);
1054	}
1055	if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
1056		fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
1057	if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
1058		fprintf(f, "bss_expiration_age=%u\n",
1059			config->bss_expiration_age);
1060	if (config->bss_expiration_scan_count !=
1061	    DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
1062		fprintf(f, "bss_expiration_scan_count=%u\n",
1063			config->bss_expiration_scan_count);
1064	if (config->filter_ssids)
1065		fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
1066	if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
1067		fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
1068	if (config->disassoc_low_ack)
1069		fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
1070#ifdef CONFIG_HS20
1071	if (config->hs20)
1072		fprintf(f, "hs20=1\n");
1073#endif /* CONFIG_HS20 */
1074#ifdef CONFIG_INTERWORKING
1075	if (config->interworking)
1076		fprintf(f, "interworking=%u\n", config->interworking);
1077	if (!is_zero_ether_addr(config->hessid))
1078		fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
1079	if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
1080		fprintf(f, "access_network_type=%d\n",
1081			config->access_network_type);
1082#endif /* CONFIG_INTERWORKING */
1083	if (config->pbc_in_m1)
1084		fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
1085	if (config->wps_nfc_pw_from_config) {
1086		if (config->wps_nfc_dev_pw_id)
1087			fprintf(f, "wps_nfc_dev_pw_id=%d\n",
1088				config->wps_nfc_dev_pw_id);
1089		write_global_bin(f, "wps_nfc_dh_pubkey",
1090				 config->wps_nfc_dh_pubkey);
1091		write_global_bin(f, "wps_nfc_dh_privkey",
1092				 config->wps_nfc_dh_privkey);
1093		write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
1094	}
1095
1096	if (config->ext_password_backend)
1097		fprintf(f, "ext_password_backend=%s\n",
1098			config->ext_password_backend);
1099	if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
1100		fprintf(f, "p2p_go_max_inactivity=%d\n",
1101			config->p2p_go_max_inactivity);
1102	if (config->auto_interworking)
1103		fprintf(f, "auto_interworking=%d\n",
1104			config->auto_interworking);
1105	if (config->okc)
1106		fprintf(f, "okc=%d\n", config->okc);
1107	if (config->pmf)
1108		fprintf(f, "pmf=%d\n", config->pmf);
1109	if (config->dtim_period)
1110		fprintf(f, "dtim_period=%d\n", config->dtim_period);
1111	if (config->beacon_int)
1112		fprintf(f, "beacon_int=%d\n", config->beacon_int);
1113
1114	if (config->sae_groups) {
1115		int i;
1116		fprintf(f, "sae_groups=");
1117		for (i = 0; config->sae_groups[i] >= 0; i++) {
1118			fprintf(f, "%s%d", i > 0 ? " " : "",
1119				config->sae_groups[i]);
1120		}
1121		fprintf(f, "\n");
1122	}
1123
1124	if (config->ap_vendor_elements) {
1125		int i, len = wpabuf_len(config->ap_vendor_elements);
1126		const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1127		if (len > 0) {
1128			fprintf(f, "ap_vendor_elements=");
1129			for (i = 0; i < len; i++)
1130				fprintf(f, "%02x", *p++);
1131			fprintf(f, "\n");
1132		}
1133	}
1134
1135	if (config->ignore_old_scan_res)
1136		fprintf(f, "ignore_old_scan_res=%d\n",
1137			config->ignore_old_scan_res);
1138
1139	if (config->freq_list && config->freq_list[0]) {
1140		int i;
1141		fprintf(f, "freq_list=");
1142		for (i = 0; config->freq_list[i]; i++) {
1143			fprintf(f, "%s%u", i > 0 ? " " : "",
1144				config->freq_list[i]);
1145		}
1146		fprintf(f, "\n");
1147	}
1148	if (config->scan_cur_freq != DEFAULT_SCAN_CUR_FREQ)
1149		fprintf(f, "scan_cur_freq=%d\n", config->scan_cur_freq);
1150
1151	if (config->sched_scan_interval)
1152		fprintf(f, "sched_scan_interval=%u\n",
1153			config->sched_scan_interval);
1154
1155	if (config->external_sim)
1156		fprintf(f, "external_sim=%d\n", config->external_sim);
1157
1158	if (config->tdls_external_control)
1159		fprintf(f, "tdls_external_control=%d\n",
1160			config->tdls_external_control);
1161
1162	if (config->wowlan_triggers)
1163		fprintf(f, "wowlan_triggers=\"%s\"\n",
1164			config->wowlan_triggers);
1165
1166	if (config->bgscan)
1167		fprintf(f, "bgscan=\"%s\"\n", config->bgscan);
1168
1169	if (config->p2p_search_delay != DEFAULT_P2P_SEARCH_DELAY)
1170		fprintf(f, "p2p_search_delay=%u\n",
1171			config->p2p_search_delay);
1172}
1173
1174#endif /* CONFIG_NO_CONFIG_WRITE */
1175
1176
1177int wpa_config_write(const char *name, struct wpa_config *config)
1178{
1179#ifndef CONFIG_NO_CONFIG_WRITE
1180	FILE *f;
1181	struct wpa_ssid *ssid;
1182	struct wpa_cred *cred;
1183#ifndef CONFIG_NO_CONFIG_BLOBS
1184	struct wpa_config_blob *blob;
1185#endif /* CONFIG_NO_CONFIG_BLOBS */
1186	int ret = 0;
1187
1188	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1189
1190	f = fopen(name, "w");
1191	if (f == NULL) {
1192		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1193		return -1;
1194	}
1195
1196	wpa_config_write_global(f, config);
1197
1198	for (cred = config->cred; cred; cred = cred->next) {
1199		if (cred->temporary)
1200			continue;
1201		fprintf(f, "\ncred={\n");
1202		wpa_config_write_cred(f, cred);
1203		fprintf(f, "}\n");
1204	}
1205
1206	for (ssid = config->ssid; ssid; ssid = ssid->next) {
1207		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1208			continue; /* do not save temporary networks */
1209		if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1210		    !ssid->passphrase)
1211			continue; /* do not save invalid network */
1212		fprintf(f, "\nnetwork={\n");
1213		wpa_config_write_network(f, ssid);
1214		fprintf(f, "}\n");
1215	}
1216
1217#ifndef CONFIG_NO_CONFIG_BLOBS
1218	for (blob = config->blobs; blob; blob = blob->next) {
1219		ret = wpa_config_write_blob(f, blob);
1220		if (ret)
1221			break;
1222	}
1223#endif /* CONFIG_NO_CONFIG_BLOBS */
1224
1225	fclose(f);
1226
1227	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1228		   name, ret ? "un" : "");
1229	return ret;
1230#else /* CONFIG_NO_CONFIG_WRITE */
1231	return -1;
1232#endif /* CONFIG_NO_CONFIG_WRITE */
1233}
1234