config_file.c revision 6c0da2bb83f6915d8260912362692d1a742e057b 
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	if (ssid->mode == WPAS_MODE_MESH &&
147	    (ssid->key_mgmt != WPA_KEY_MGMT_NONE &&
148	    ssid->key_mgmt != WPA_KEY_MGMT_SAE)) {
149		wpa_printf(MSG_ERROR,
150			   "Line %d: key_mgmt for mesh network should be open or SAE",
151			   line);
152		errors++;
153	}
154
155	return errors;
156}
157
158
159static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
160{
161	struct wpa_ssid *ssid;
162	int errors = 0, end = 0;
163	char buf[2000], *pos, *pos2;
164
165	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
166		   *line);
167	ssid = os_zalloc(sizeof(*ssid));
168	if (ssid == NULL)
169		return NULL;
170	dl_list_init(&ssid->psk_list);
171	ssid->id = id;
172
173	wpa_config_set_network_defaults(ssid);
174
175	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
176		if (os_strcmp(pos, "}") == 0) {
177			end = 1;
178			break;
179		}
180
181		pos2 = os_strchr(pos, '=');
182		if (pos2 == NULL) {
183			wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
184				   "'%s'.", *line, pos);
185			errors++;
186			continue;
187		}
188
189		*pos2++ = '\0';
190		if (*pos2 == '"') {
191			if (os_strchr(pos2 + 1, '"') == NULL) {
192				wpa_printf(MSG_ERROR, "Line %d: invalid "
193					   "quotation '%s'.", *line, pos2);
194				errors++;
195				continue;
196			}
197		}
198
199		if (wpa_config_set(ssid, pos, pos2, *line) < 0)
200			errors++;
201	}
202
203	if (!end) {
204		wpa_printf(MSG_ERROR, "Line %d: network block was not "
205			   "terminated properly.", *line);
206		errors++;
207	}
208
209	errors += wpa_config_validate_network(ssid, *line);
210
211	if (errors) {
212		wpa_config_free_ssid(ssid);
213		ssid = NULL;
214	}
215
216	return ssid;
217}
218
219
220static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
221{
222	struct wpa_cred *cred;
223	int errors = 0, end = 0;
224	char buf[256], *pos, *pos2;
225
226	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
227	cred = os_zalloc(sizeof(*cred));
228	if (cred == NULL)
229		return NULL;
230	cred->id = id;
231	cred->sim_num = DEFAULT_USER_SELECTED_SIM;
232
233	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
234		if (os_strcmp(pos, "}") == 0) {
235			end = 1;
236			break;
237		}
238
239		pos2 = os_strchr(pos, '=');
240		if (pos2 == NULL) {
241			wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
242				   "'%s'.", *line, pos);
243			errors++;
244			continue;
245		}
246
247		*pos2++ = '\0';
248		if (*pos2 == '"') {
249			if (os_strchr(pos2 + 1, '"') == NULL) {
250				wpa_printf(MSG_ERROR, "Line %d: invalid "
251					   "quotation '%s'.", *line, pos2);
252				errors++;
253				continue;
254			}
255		}
256
257		if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
258			errors++;
259	}
260
261	if (!end) {
262		wpa_printf(MSG_ERROR, "Line %d: cred block was not "
263			   "terminated properly.", *line);
264		errors++;
265	}
266
267	if (errors) {
268		wpa_config_free_cred(cred);
269		cred = NULL;
270	}
271
272	return cred;
273}
274
275
276#ifndef CONFIG_NO_CONFIG_BLOBS
277static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
278						     const char *name)
279{
280	struct wpa_config_blob *blob;
281	char buf[256], *pos;
282	unsigned char *encoded = NULL, *nencoded;
283	int end = 0;
284	size_t encoded_len = 0, len;
285
286	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
287		   *line, name);
288
289	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
290		if (os_strcmp(pos, "}") == 0) {
291			end = 1;
292			break;
293		}
294
295		len = os_strlen(pos);
296		nencoded = os_realloc(encoded, encoded_len + len);
297		if (nencoded == NULL) {
298			wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
299				   "blob", *line);
300			os_free(encoded);
301			return NULL;
302		}
303		encoded = nencoded;
304		os_memcpy(encoded + encoded_len, pos, len);
305		encoded_len += len;
306	}
307
308	if (!end) {
309		wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
310			   "properly", *line);
311		os_free(encoded);
312		return NULL;
313	}
314
315	blob = os_zalloc(sizeof(*blob));
316	if (blob == NULL) {
317		os_free(encoded);
318		return NULL;
319	}
320	blob->name = os_strdup(name);
321	blob->data = base64_decode(encoded, encoded_len, &blob->len);
322	os_free(encoded);
323
324	if (blob->name == NULL || blob->data == NULL) {
325		wpa_config_free_blob(blob);
326		return NULL;
327	}
328
329	return blob;
330}
331
332
333static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
334				   int *line, char *bname)
335{
336	char *name_end;
337	struct wpa_config_blob *blob;
338
339	name_end = os_strchr(bname, '=');
340	if (name_end == NULL) {
341		wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
342			   *line);
343		return -1;
344	}
345	*name_end = '\0';
346
347	blob = wpa_config_read_blob(f, line, bname);
348	if (blob == NULL) {
349		wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
350			   *line, bname);
351		return -1;
352	}
353	wpa_config_set_blob(config, blob);
354	return 0;
355}
356#endif /* CONFIG_NO_CONFIG_BLOBS */
357
358
359struct wpa_config * wpa_config_read(const char *name, struct wpa_config *cfgp)
360{
361	FILE *f;
362	char buf[512], *pos;
363	int errors = 0, line = 0;
364	struct wpa_ssid *ssid, *tail, *head;
365	struct wpa_cred *cred, *cred_tail, *cred_head;
366	struct wpa_config *config;
367	int id = 0;
368	int cred_id = 0;
369
370	if (name == NULL)
371		return NULL;
372	if (cfgp)
373		config = cfgp;
374	else
375		config = wpa_config_alloc_empty(NULL, NULL);
376	if (config == NULL) {
377		wpa_printf(MSG_ERROR, "Failed to allocate config file "
378			   "structure");
379		return NULL;
380	}
381	tail = head = config->ssid;
382	while (tail && tail->next)
383		tail = tail->next;
384	cred_tail = cred_head = config->cred;
385	while (cred_tail && cred_tail->next)
386		cred_tail = cred_tail->next;
387
388	wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
389	f = fopen(name, "r");
390	if (f == NULL) {
391		wpa_printf(MSG_ERROR, "Failed to open config file '%s', "
392			   "error: %s", name, strerror(errno));
393		os_free(config);
394		return NULL;
395	}
396
397	while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
398		if (os_strcmp(pos, "network={") == 0) {
399			ssid = wpa_config_read_network(f, &line, id++);
400			if (ssid == NULL) {
401				wpa_printf(MSG_ERROR, "Line %d: failed to "
402					   "parse network block.", line);
403				errors++;
404				continue;
405			}
406			if (head == NULL) {
407				head = tail = ssid;
408			} else {
409				tail->next = ssid;
410				tail = ssid;
411			}
412			if (wpa_config_add_prio_network(config, ssid)) {
413				wpa_printf(MSG_ERROR, "Line %d: failed to add "
414					   "network block to priority list.",
415					   line);
416				errors++;
417				continue;
418			}
419		} else if (os_strcmp(pos, "cred={") == 0) {
420			cred = wpa_config_read_cred(f, &line, cred_id++);
421			if (cred == NULL) {
422				wpa_printf(MSG_ERROR, "Line %d: failed to "
423					   "parse cred block.", line);
424				errors++;
425				continue;
426			}
427			if (cred_head == NULL) {
428				cred_head = cred_tail = cred;
429			} else {
430				cred_tail->next = cred;
431				cred_tail = cred;
432			}
433#ifndef CONFIG_NO_CONFIG_BLOBS
434		} else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
435			if (wpa_config_process_blob(config, f, &line, pos + 12)
436			    < 0) {
437				wpa_printf(MSG_ERROR, "Line %d: failed to "
438					   "process blob.", line);
439				errors++;
440				continue;
441			}
442#endif /* CONFIG_NO_CONFIG_BLOBS */
443		} else if (wpa_config_process_global(config, pos, line) < 0) {
444			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
445				   "line '%s'.", line, pos);
446			errors++;
447			continue;
448		}
449	}
450
451	fclose(f);
452
453	config->ssid = head;
454	wpa_config_debug_dump_networks(config);
455	config->cred = cred_head;
456
457#ifndef WPA_IGNORE_CONFIG_ERRORS
458	if (errors) {
459		wpa_config_free(config);
460		config = NULL;
461		head = NULL;
462	}
463#endif /* WPA_IGNORE_CONFIG_ERRORS */
464
465	return config;
466}
467
468
469#ifndef CONFIG_NO_CONFIG_WRITE
470
471static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
472{
473	char *value = wpa_config_get(ssid, field);
474	if (value == NULL)
475		return;
476	fprintf(f, "\t%s=%s\n", field, value);
477	os_free(value);
478}
479
480
481static void write_int(FILE *f, const char *field, int value, int def)
482{
483	if (value == def)
484		return;
485	fprintf(f, "\t%s=%d\n", field, value);
486}
487
488
489static void write_bssid(FILE *f, struct wpa_ssid *ssid)
490{
491	char *value = wpa_config_get(ssid, "bssid");
492	if (value == NULL)
493		return;
494	fprintf(f, "\tbssid=%s\n", value);
495	os_free(value);
496}
497
498
499static void write_psk(FILE *f, struct wpa_ssid *ssid)
500{
501	char *value = wpa_config_get(ssid, "psk");
502	if (value == NULL)
503		return;
504	fprintf(f, "\tpsk=%s\n", value);
505	os_free(value);
506}
507
508
509static void write_proto(FILE *f, struct wpa_ssid *ssid)
510{
511	char *value;
512
513	if (ssid->proto == DEFAULT_PROTO)
514		return;
515
516	value = wpa_config_get(ssid, "proto");
517	if (value == NULL)
518		return;
519	if (value[0])
520		fprintf(f, "\tproto=%s\n", value);
521	os_free(value);
522}
523
524
525static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
526{
527	char *value;
528
529	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
530		return;
531
532	value = wpa_config_get(ssid, "key_mgmt");
533	if (value == NULL)
534		return;
535	if (value[0])
536		fprintf(f, "\tkey_mgmt=%s\n", value);
537	os_free(value);
538}
539
540
541static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
542{
543	char *value;
544
545	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
546		return;
547
548	value = wpa_config_get(ssid, "pairwise");
549	if (value == NULL)
550		return;
551	if (value[0])
552		fprintf(f, "\tpairwise=%s\n", value);
553	os_free(value);
554}
555
556
557static void write_group(FILE *f, struct wpa_ssid *ssid)
558{
559	char *value;
560
561	if (ssid->group_cipher == DEFAULT_GROUP)
562		return;
563
564	value = wpa_config_get(ssid, "group");
565	if (value == NULL)
566		return;
567	if (value[0])
568		fprintf(f, "\tgroup=%s\n", value);
569	os_free(value);
570}
571
572
573static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
574{
575	char *value;
576
577	if (ssid->auth_alg == 0)
578		return;
579
580	value = wpa_config_get(ssid, "auth_alg");
581	if (value == NULL)
582		return;
583	if (value[0])
584		fprintf(f, "\tauth_alg=%s\n", value);
585	os_free(value);
586}
587
588
589#ifdef IEEE8021X_EAPOL
590static void write_eap(FILE *f, struct wpa_ssid *ssid)
591{
592	char *value;
593
594	value = wpa_config_get(ssid, "eap");
595	if (value == NULL)
596		return;
597
598	if (value[0])
599		fprintf(f, "\teap=%s\n", value);
600	os_free(value);
601}
602#endif /* IEEE8021X_EAPOL */
603
604
605static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
606{
607	char field[20], *value;
608	int res;
609
610	res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
611	if (os_snprintf_error(sizeof(field), res))
612		return;
613	value = wpa_config_get(ssid, field);
614	if (value) {
615		fprintf(f, "\t%s=%s\n", field, value);
616		os_free(value);
617	}
618}
619
620
621#ifdef CONFIG_P2P
622
623static void write_go_p2p_dev_addr(FILE *f, struct wpa_ssid *ssid)
624{
625	char *value = wpa_config_get(ssid, "go_p2p_dev_addr");
626	if (value == NULL)
627		return;
628	fprintf(f, "\tgo_p2p_dev_addr=%s\n", value);
629	os_free(value);
630}
631
632static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
633{
634	char *value = wpa_config_get(ssid, "p2p_client_list");
635	if (value == NULL)
636		return;
637	fprintf(f, "\tp2p_client_list=%s\n", value);
638	os_free(value);
639}
640
641
642static void write_psk_list(FILE *f, struct wpa_ssid *ssid)
643{
644	struct psk_list_entry *psk;
645	char hex[32 * 2 + 1];
646
647	dl_list_for_each(psk, &ssid->psk_list, struct psk_list_entry, list) {
648		wpa_snprintf_hex(hex, sizeof(hex), psk->psk, sizeof(psk->psk));
649		fprintf(f, "\tpsk_list=%s" MACSTR "-%s\n",
650			psk->p2p ? "P2P-" : "", MAC2STR(psk->addr), hex);
651	}
652}
653
654#endif /* CONFIG_P2P */
655
656
657static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
658{
659	int i;
660
661#define STR(t) write_str(f, #t, ssid)
662#define INT(t) write_int(f, #t, ssid->t, 0)
663#define INTe(t) write_int(f, #t, ssid->eap.t, 0)
664#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
665#define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
666
667	STR(ssid);
668	INT(scan_ssid);
669	write_bssid(f, ssid);
670	write_psk(f, ssid);
671	write_proto(f, ssid);
672	write_key_mgmt(f, ssid);
673	INT_DEF(bg_scan_period, DEFAULT_BG_SCAN_PERIOD);
674	write_pairwise(f, ssid);
675	write_group(f, ssid);
676	write_auth_alg(f, ssid);
677	STR(bgscan);
678	STR(autoscan);
679	STR(scan_freq);
680#ifdef IEEE8021X_EAPOL
681	write_eap(f, ssid);
682	STR(identity);
683	STR(anonymous_identity);
684	STR(password);
685	STR(ca_cert);
686	STR(ca_path);
687	STR(client_cert);
688	STR(private_key);
689	STR(private_key_passwd);
690	STR(dh_file);
691	STR(subject_match);
692	STR(altsubject_match);
693	STR(domain_suffix_match);
694	STR(ca_cert2);
695	STR(ca_path2);
696	STR(client_cert2);
697	STR(private_key2);
698	STR(private_key2_passwd);
699	STR(dh_file2);
700	STR(subject_match2);
701	STR(altsubject_match2);
702	STR(domain_suffix_match2);
703	STR(phase1);
704	STR(phase2);
705	STR(pcsc);
706	STR(pin);
707	STR(engine_id);
708	STR(key_id);
709	STR(cert_id);
710	STR(ca_cert_id);
711	STR(key2_id);
712	STR(pin2);
713	STR(engine2_id);
714	STR(cert2_id);
715	STR(ca_cert2_id);
716	INTe(engine);
717	INTe(engine2);
718	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
719	INTe(erp);
720#endif /* IEEE8021X_EAPOL */
721	for (i = 0; i < 4; i++)
722		write_wep_key(f, i, ssid);
723	INT(wep_tx_keyidx);
724	INT(priority);
725#ifdef IEEE8021X_EAPOL
726	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
727	STR(pac_file);
728	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
729	INTe(ocsp);
730	INT_DEFe(sim_num, DEFAULT_USER_SELECTED_SIM);
731#endif /* IEEE8021X_EAPOL */
732	INT(mode);
733	INT(frequency);
734	write_int(f, "proactive_key_caching", ssid->proactive_key_caching, -1);
735	INT(disabled);
736	INT(peerkey);
737#ifdef CONFIG_IEEE80211W
738	write_int(f, "ieee80211w", ssid->ieee80211w,
739		  MGMT_FRAME_PROTECTION_DEFAULT);
740#endif /* CONFIG_IEEE80211W */
741	STR(id_str);
742#ifdef CONFIG_P2P
743	write_go_p2p_dev_addr(f, ssid);
744	write_p2p_client_list(f, ssid);
745	write_psk_list(f, ssid);
746#endif /* CONFIG_P2P */
747	INT(dtim_period);
748	INT(beacon_int);
749#ifdef CONFIG_MACSEC
750	INT(macsec_policy);
751#endif /* CONFIG_MACSEC */
752#ifdef CONFIG_HS20
753	INT(update_identifier);
754#endif /* CONFIG_HS20 */
755	write_int(f, "mac_addr", ssid->mac_addr, -1);
756#ifdef CONFIG_MESH
757	STR(mesh_ht_mode);
758	STR(mesh_basic_rates);
759	INT_DEF(dot11MeshMaxRetries, DEFAULT_MESH_MAX_RETRIES);
760	INT_DEF(dot11MeshRetryTimeout, DEFAULT_MESH_RETRY_TIMEOUT);
761	INT_DEF(dot11MeshConfirmTimeout, DEFAULT_MESH_CONFIRM_TIMEOUT);
762	INT_DEF(dot11MeshHoldingTimeout, DEFAULT_MESH_HOLDING_TIMEOUT);
763#endif /* CONFIG_MESH */
764
765#undef STR
766#undef INT
767#undef INT_DEF
768}
769
770
771static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
772{
773	size_t i;
774
775	if (cred->priority)
776		fprintf(f, "\tpriority=%d\n", cred->priority);
777	if (cred->pcsc)
778		fprintf(f, "\tpcsc=%d\n", cred->pcsc);
779	if (cred->realm)
780		fprintf(f, "\trealm=\"%s\"\n", cred->realm);
781	if (cred->username)
782		fprintf(f, "\tusername=\"%s\"\n", cred->username);
783	if (cred->password && cred->ext_password)
784		fprintf(f, "\tpassword=ext:%s\n", cred->password);
785	else if (cred->password)
786		fprintf(f, "\tpassword=\"%s\"\n", cred->password);
787	if (cred->ca_cert)
788		fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
789	if (cred->client_cert)
790		fprintf(f, "\tclient_cert=\"%s\"\n", cred->client_cert);
791	if (cred->private_key)
792		fprintf(f, "\tprivate_key=\"%s\"\n", cred->private_key);
793	if (cred->private_key_passwd)
794		fprintf(f, "\tprivate_key_passwd=\"%s\"\n",
795			cred->private_key_passwd);
796	if (cred->imsi)
797		fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
798	if (cred->milenage)
799		fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
800	for (i = 0; i < cred->num_domain; i++)
801		fprintf(f, "\tdomain=\"%s\"\n", cred->domain[i]);
802	if (cred->domain_suffix_match)
803		fprintf(f, "\tdomain_suffix_match=\"%s\"\n",
804			cred->domain_suffix_match);
805	if (cred->roaming_consortium_len) {
806		fprintf(f, "\troaming_consortium=");
807		for (i = 0; i < cred->roaming_consortium_len; i++)
808			fprintf(f, "%02x", cred->roaming_consortium[i]);
809		fprintf(f, "\n");
810	}
811	if (cred->eap_method) {
812		const char *name;
813		name = eap_get_name(cred->eap_method[0].vendor,
814				    cred->eap_method[0].method);
815		if (name)
816			fprintf(f, "\teap=%s\n", name);
817	}
818	if (cred->phase1)
819		fprintf(f, "\tphase1=\"%s\"\n", cred->phase1);
820	if (cred->phase2)
821		fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
822	if (cred->excluded_ssid) {
823		size_t j;
824		for (i = 0; i < cred->num_excluded_ssid; i++) {
825			struct excluded_ssid *e = &cred->excluded_ssid[i];
826			fprintf(f, "\texcluded_ssid=");
827			for (j = 0; j < e->ssid_len; j++)
828				fprintf(f, "%02x", e->ssid[j]);
829			fprintf(f, "\n");
830		}
831	}
832	if (cred->roaming_partner) {
833		for (i = 0; i < cred->num_roaming_partner; i++) {
834			struct roaming_partner *p = &cred->roaming_partner[i];
835			fprintf(f, "\troaming_partner=\"%s,%d,%u,%s\"\n",
836				p->fqdn, p->exact_match, p->priority,
837				p->country);
838		}
839	}
840	if (cred->update_identifier)
841		fprintf(f, "\tupdate_identifier=%d\n", cred->update_identifier);
842
843	if (cred->provisioning_sp)
844		fprintf(f, "\tprovisioning_sp=\"%s\"\n", cred->provisioning_sp);
845	if (cred->sp_priority)
846		fprintf(f, "\tsp_priority=%d\n", cred->sp_priority);
847
848	if (cred->min_dl_bandwidth_home)
849		fprintf(f, "\tmin_dl_bandwidth_home=%u\n",
850			cred->min_dl_bandwidth_home);
851	if (cred->min_ul_bandwidth_home)
852		fprintf(f, "\tmin_ul_bandwidth_home=%u\n",
853			cred->min_ul_bandwidth_home);
854	if (cred->min_dl_bandwidth_roaming)
855		fprintf(f, "\tmin_dl_bandwidth_roaming=%u\n",
856			cred->min_dl_bandwidth_roaming);
857	if (cred->min_ul_bandwidth_roaming)
858		fprintf(f, "\tmin_ul_bandwidth_roaming=%u\n",
859			cred->min_ul_bandwidth_roaming);
860
861	if (cred->max_bss_load)
862		fprintf(f, "\tmax_bss_load=%u\n",
863			cred->max_bss_load);
864
865	if (cred->ocsp)
866		fprintf(f, "\tocsp=%d\n", cred->ocsp);
867
868	if (cred->num_req_conn_capab) {
869		for (i = 0; i < cred->num_req_conn_capab; i++) {
870			int *ports;
871
872			fprintf(f, "\treq_conn_capab=%u",
873				cred->req_conn_capab_proto[i]);
874			ports = cred->req_conn_capab_port[i];
875			if (ports) {
876				int j;
877				for (j = 0; ports[j] != -1; j++) {
878					fprintf(f, "%s%d", j > 0 ? "," : ":",
879						ports[j]);
880				}
881			}
882			fprintf(f, "\n");
883		}
884	}
885
886	if (cred->required_roaming_consortium_len) {
887		fprintf(f, "\trequired_roaming_consortium=");
888		for (i = 0; i < cred->required_roaming_consortium_len; i++)
889			fprintf(f, "%02x",
890				cred->required_roaming_consortium[i]);
891		fprintf(f, "\n");
892	}
893
894	if (cred->sim_num != DEFAULT_USER_SELECTED_SIM)
895		fprintf(f, "\tsim_num=%d\n", cred->sim_num);
896}
897
898
899#ifndef CONFIG_NO_CONFIG_BLOBS
900static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
901{
902	unsigned char *encoded;
903
904	encoded = base64_encode(blob->data, blob->len, NULL);
905	if (encoded == NULL)
906		return -1;
907
908	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
909	os_free(encoded);
910	return 0;
911}
912#endif /* CONFIG_NO_CONFIG_BLOBS */
913
914
915static void write_global_bin(FILE *f, const char *field,
916			     const struct wpabuf *val)
917{
918	size_t i;
919	const u8 *pos;
920
921	if (val == NULL)
922		return;
923
924	fprintf(f, "%s=", field);
925	pos = wpabuf_head(val);
926	for (i = 0; i < wpabuf_len(val); i++)
927		fprintf(f, "%02X", *pos++);
928	fprintf(f, "\n");
929}
930
931
932static void wpa_config_write_global(FILE *f, struct wpa_config *config)
933{
934#ifdef CONFIG_CTRL_IFACE
935	if (config->ctrl_interface)
936		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
937	if (config->ctrl_interface_group)
938		fprintf(f, "ctrl_interface_group=%s\n",
939			config->ctrl_interface_group);
940#endif /* CONFIG_CTRL_IFACE */
941	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
942		fprintf(f, "eapol_version=%d\n", config->eapol_version);
943	if (config->ap_scan != DEFAULT_AP_SCAN)
944		fprintf(f, "ap_scan=%d\n", config->ap_scan);
945	if (config->disable_scan_offload)
946		fprintf(f, "disable_scan_offload=%d\n",
947			config->disable_scan_offload);
948	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
949		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
950	if (config->opensc_engine_path)
951		fprintf(f, "opensc_engine_path=%s\n",
952			config->opensc_engine_path);
953	if (config->pkcs11_engine_path)
954		fprintf(f, "pkcs11_engine_path=%s\n",
955			config->pkcs11_engine_path);
956	if (config->pkcs11_module_path)
957		fprintf(f, "pkcs11_module_path=%s\n",
958			config->pkcs11_module_path);
959	if (config->openssl_ciphers)
960		fprintf(f, "openssl_ciphers=%s\n", config->openssl_ciphers);
961	if (config->pcsc_reader)
962		fprintf(f, "pcsc_reader=%s\n", config->pcsc_reader);
963	if (config->pcsc_pin)
964		fprintf(f, "pcsc_pin=%s\n", config->pcsc_pin);
965	if (config->driver_param)
966		fprintf(f, "driver_param=%s\n", config->driver_param);
967	if (config->dot11RSNAConfigPMKLifetime)
968		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
969			config->dot11RSNAConfigPMKLifetime);
970	if (config->dot11RSNAConfigPMKReauthThreshold)
971		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
972			config->dot11RSNAConfigPMKReauthThreshold);
973	if (config->dot11RSNAConfigSATimeout)
974		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
975			config->dot11RSNAConfigSATimeout);
976	if (config->update_config)
977		fprintf(f, "update_config=%d\n", config->update_config);
978#ifdef CONFIG_WPS
979	if (!is_nil_uuid(config->uuid)) {
980		char buf[40];
981		uuid_bin2str(config->uuid, buf, sizeof(buf));
982		fprintf(f, "uuid=%s\n", buf);
983	}
984	if (config->device_name)
985		fprintf(f, "device_name=%s\n", config->device_name);
986	if (config->manufacturer)
987		fprintf(f, "manufacturer=%s\n", config->manufacturer);
988	if (config->model_name)
989		fprintf(f, "model_name=%s\n", config->model_name);
990	if (config->model_number)
991		fprintf(f, "model_number=%s\n", config->model_number);
992	if (config->serial_number)
993		fprintf(f, "serial_number=%s\n", config->serial_number);
994	{
995		char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
996		buf = wps_dev_type_bin2str(config->device_type,
997					   _buf, sizeof(_buf));
998		if (os_strcmp(buf, "0-00000000-0") != 0)
999			fprintf(f, "device_type=%s\n", buf);
1000	}
1001	if (WPA_GET_BE32(config->os_version))
1002		fprintf(f, "os_version=%08x\n",
1003			WPA_GET_BE32(config->os_version));
1004	if (config->config_methods)
1005		fprintf(f, "config_methods=%s\n", config->config_methods);
1006	if (config->wps_cred_processing)
1007		fprintf(f, "wps_cred_processing=%d\n",
1008			config->wps_cred_processing);
1009	if (config->wps_vendor_ext_m1) {
1010		int i, len = wpabuf_len(config->wps_vendor_ext_m1);
1011		const u8 *p = wpabuf_head_u8(config->wps_vendor_ext_m1);
1012		if (len > 0) {
1013			fprintf(f, "wps_vendor_ext_m1=");
1014			for (i = 0; i < len; i++)
1015				fprintf(f, "%02x", *p++);
1016			fprintf(f, "\n");
1017		}
1018	}
1019#endif /* CONFIG_WPS */
1020#ifdef CONFIG_P2P
1021	if (config->p2p_listen_reg_class)
1022		fprintf(f, "p2p_listen_reg_class=%u\n",
1023			config->p2p_listen_reg_class);
1024	if (config->p2p_listen_channel)
1025		fprintf(f, "p2p_listen_channel=%u\n",
1026			config->p2p_listen_channel);
1027	if (config->p2p_oper_reg_class)
1028		fprintf(f, "p2p_oper_reg_class=%u\n",
1029			config->p2p_oper_reg_class);
1030	if (config->p2p_oper_channel)
1031		fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
1032	if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
1033		fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
1034	if (config->p2p_ssid_postfix)
1035		fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
1036	if (config->persistent_reconnect)
1037		fprintf(f, "persistent_reconnect=%u\n",
1038			config->persistent_reconnect);
1039	if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
1040		fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
1041	if (config->p2p_group_idle)
1042		fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
1043	if (config->p2p_passphrase_len)
1044		fprintf(f, "p2p_passphrase_len=%u\n",
1045			config->p2p_passphrase_len);
1046	if (config->p2p_pref_chan) {
1047		unsigned int i;
1048		fprintf(f, "p2p_pref_chan=");
1049		for (i = 0; i < config->num_p2p_pref_chan; i++) {
1050			fprintf(f, "%s%u:%u", i > 0 ? "," : "",
1051				config->p2p_pref_chan[i].op_class,
1052				config->p2p_pref_chan[i].chan);
1053		}
1054		fprintf(f, "\n");
1055	}
1056	if (config->p2p_no_go_freq.num) {
1057		char *val = freq_range_list_str(&config->p2p_no_go_freq);
1058		if (val) {
1059			fprintf(f, "p2p_no_go_freq=%s\n", val);
1060			os_free(val);
1061		}
1062	}
1063	if (config->p2p_add_cli_chan)
1064		fprintf(f, "p2p_add_cli_chan=%d\n", config->p2p_add_cli_chan);
1065	if (config->p2p_optimize_listen_chan !=
1066	    DEFAULT_P2P_OPTIMIZE_LISTEN_CHAN)
1067		fprintf(f, "p2p_optimize_listen_chan=%d\n",
1068			config->p2p_optimize_listen_chan);
1069	if (config->p2p_go_ht40)
1070		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
1071	if (config->p2p_go_vht)
1072		fprintf(f, "p2p_go_vht=%u\n", config->p2p_go_vht);
1073	if (config->p2p_disabled)
1074		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
1075	if (config->p2p_no_group_iface)
1076		fprintf(f, "p2p_no_group_iface=%u\n",
1077			config->p2p_no_group_iface);
1078	if (config->p2p_ignore_shared_freq)
1079		fprintf(f, "p2p_ignore_shared_freq=%u\n",
1080			config->p2p_ignore_shared_freq);
1081#endif /* CONFIG_P2P */
1082	if (config->country[0] && config->country[1]) {
1083		fprintf(f, "country=%c%c\n",
1084			config->country[0], config->country[1]);
1085	}
1086	if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
1087		fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
1088	if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
1089		fprintf(f, "bss_expiration_age=%u\n",
1090			config->bss_expiration_age);
1091	if (config->bss_expiration_scan_count !=
1092	    DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
1093		fprintf(f, "bss_expiration_scan_count=%u\n",
1094			config->bss_expiration_scan_count);
1095	if (config->filter_ssids)
1096		fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
1097	if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
1098		fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
1099	if (config->disassoc_low_ack)
1100		fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
1101#ifdef CONFIG_HS20
1102	if (config->hs20)
1103		fprintf(f, "hs20=1\n");
1104#endif /* CONFIG_HS20 */
1105#ifdef CONFIG_INTERWORKING
1106	if (config->interworking)
1107		fprintf(f, "interworking=%u\n", config->interworking);
1108	if (!is_zero_ether_addr(config->hessid))
1109		fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
1110	if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
1111		fprintf(f, "access_network_type=%d\n",
1112			config->access_network_type);
1113#endif /* CONFIG_INTERWORKING */
1114	if (config->pbc_in_m1)
1115		fprintf(f, "pbc_in_m1=%u\n", config->pbc_in_m1);
1116	if (config->wps_nfc_pw_from_config) {
1117		if (config->wps_nfc_dev_pw_id)
1118			fprintf(f, "wps_nfc_dev_pw_id=%d\n",
1119				config->wps_nfc_dev_pw_id);
1120		write_global_bin(f, "wps_nfc_dh_pubkey",
1121				 config->wps_nfc_dh_pubkey);
1122		write_global_bin(f, "wps_nfc_dh_privkey",
1123				 config->wps_nfc_dh_privkey);
1124		write_global_bin(f, "wps_nfc_dev_pw", config->wps_nfc_dev_pw);
1125	}
1126
1127	if (config->ext_password_backend)
1128		fprintf(f, "ext_password_backend=%s\n",
1129			config->ext_password_backend);
1130	if (config->p2p_go_max_inactivity != DEFAULT_P2P_GO_MAX_INACTIVITY)
1131		fprintf(f, "p2p_go_max_inactivity=%d\n",
1132			config->p2p_go_max_inactivity);
1133	if (config->auto_interworking)
1134		fprintf(f, "auto_interworking=%d\n",
1135			config->auto_interworking);
1136	if (config->okc)
1137		fprintf(f, "okc=%d\n", config->okc);
1138	if (config->pmf)
1139		fprintf(f, "pmf=%d\n", config->pmf);
1140	if (config->dtim_period)
1141		fprintf(f, "dtim_period=%d\n", config->dtim_period);
1142	if (config->beacon_int)
1143		fprintf(f, "beacon_int=%d\n", config->beacon_int);
1144
1145	if (config->sae_groups) {
1146		int i;
1147		fprintf(f, "sae_groups=");
1148		for (i = 0; config->sae_groups[i] >= 0; i++) {
1149			fprintf(f, "%s%d", i > 0 ? " " : "",
1150				config->sae_groups[i]);
1151		}
1152		fprintf(f, "\n");
1153	}
1154
1155	if (config->ap_vendor_elements) {
1156		int i, len = wpabuf_len(config->ap_vendor_elements);
1157		const u8 *p = wpabuf_head_u8(config->ap_vendor_elements);
1158		if (len > 0) {
1159			fprintf(f, "ap_vendor_elements=");
1160			for (i = 0; i < len; i++)
1161				fprintf(f, "%02x", *p++);
1162			fprintf(f, "\n");
1163		}
1164	}
1165
1166	if (config->ignore_old_scan_res)
1167		fprintf(f, "ignore_old_scan_res=%d\n",
1168			config->ignore_old_scan_res);
1169
1170	if (config->freq_list && config->freq_list[0]) {
1171		int i;
1172		fprintf(f, "freq_list=");
1173		for (i = 0; config->freq_list[i]; i++) {
1174			fprintf(f, "%s%u", i > 0 ? " " : "",
1175				config->freq_list[i]);
1176		}
1177		fprintf(f, "\n");
1178	}
1179	if (config->scan_cur_freq != DEFAULT_SCAN_CUR_FREQ)
1180		fprintf(f, "scan_cur_freq=%d\n", config->scan_cur_freq);
1181
1182	if (config->sched_scan_interval)
1183		fprintf(f, "sched_scan_interval=%u\n",
1184			config->sched_scan_interval);
1185
1186	if (config->external_sim)
1187		fprintf(f, "external_sim=%d\n", config->external_sim);
1188
1189	if (config->tdls_external_control)
1190		fprintf(f, "tdls_external_control=%d\n",
1191			config->tdls_external_control);
1192
1193	if (config->wowlan_triggers)
1194		fprintf(f, "wowlan_triggers=%s\n",
1195			config->wowlan_triggers);
1196
1197	if (config->bgscan)
1198		fprintf(f, "bgscan=\"%s\"\n", config->bgscan);
1199
1200	if (config->p2p_search_delay != DEFAULT_P2P_SEARCH_DELAY)
1201		fprintf(f, "p2p_search_delay=%u\n",
1202			config->p2p_search_delay);
1203
1204	if (config->mac_addr)
1205		fprintf(f, "mac_addr=%d\n", config->mac_addr);
1206
1207	if (config->rand_addr_lifetime != DEFAULT_RAND_ADDR_LIFETIME)
1208		fprintf(f, "rand_addr_lifetime=%u\n",
1209			config->rand_addr_lifetime);
1210
1211	if (config->preassoc_mac_addr)
1212		fprintf(f, "preassoc_mac_addr=%d\n", config->preassoc_mac_addr);
1213
1214	if (config->key_mgmt_offload != DEFAULT_KEY_MGMT_OFFLOAD)
1215		fprintf(f, "key_mgmt_offload=%u\n", config->key_mgmt_offload);
1216
1217	if (config->user_mpm != DEFAULT_USER_MPM)
1218		fprintf(f, "user_mpm=%d\n", config->user_mpm);
1219
1220	if (config->max_peer_links != DEFAULT_MAX_PEER_LINKS)
1221		fprintf(f, "max_peer_links=%d\n", config->max_peer_links);
1222}
1223
1224#endif /* CONFIG_NO_CONFIG_WRITE */
1225
1226
1227int wpa_config_write(const char *name, struct wpa_config *config)
1228{
1229#ifndef CONFIG_NO_CONFIG_WRITE
1230	FILE *f;
1231	struct wpa_ssid *ssid;
1232	struct wpa_cred *cred;
1233#ifndef CONFIG_NO_CONFIG_BLOBS
1234	struct wpa_config_blob *blob;
1235#endif /* CONFIG_NO_CONFIG_BLOBS */
1236	int ret = 0;
1237
1238	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
1239
1240	f = fopen(name, "w");
1241	if (f == NULL) {
1242		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
1243		return -1;
1244	}
1245
1246	wpa_config_write_global(f, config);
1247
1248	for (cred = config->cred; cred; cred = cred->next) {
1249		if (cred->temporary)
1250			continue;
1251		fprintf(f, "\ncred={\n");
1252		wpa_config_write_cred(f, cred);
1253		fprintf(f, "}\n");
1254	}
1255
1256	for (ssid = config->ssid; ssid; ssid = ssid->next) {
1257		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
1258			continue; /* do not save temporary networks */
1259		if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
1260		    !ssid->passphrase)
1261			continue; /* do not save invalid network */
1262		fprintf(f, "\nnetwork={\n");
1263		wpa_config_write_network(f, ssid);
1264		fprintf(f, "}\n");
1265	}
1266
1267#ifndef CONFIG_NO_CONFIG_BLOBS
1268	for (blob = config->blobs; blob; blob = blob->next) {
1269		ret = wpa_config_write_blob(f, blob);
1270		if (ret)
1271			break;
1272	}
1273#endif /* CONFIG_NO_CONFIG_BLOBS */
1274
1275	fclose(f);
1276
1277	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
1278		   name, ret ? "un" : "");
1279	return ret;
1280#else /* CONFIG_NO_CONFIG_WRITE */
1281	return -1;
1282#endif /* CONFIG_NO_CONFIG_WRITE */
1283}
1284