xref: /freebsd/contrib/wpa/wpa_supplicant/config_file.c (revision 5861f9665471e98e544f6fa3ce73c4912229ff82)
1 /*
2  * WPA Supplicant / Configuration backend: text file
3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  *
14  * This file implements a configuration backend for text files. All the
15  * configuration information is stored in a text file that uses a format
16  * described in the sample configuration file, wpa_supplicant.conf.
17  */
18 
19 #include "includes.h"
20 
21 #include "common.h"
22 #include "config.h"
23 #include "base64.h"
24 #include "uuid.h"
25 #include "eap_peer/eap_methods.h"
26 
27 
28 /**
29  * wpa_config_get_line - Read the next configuration file line
30  * @s: Buffer for the line
31  * @size: The buffer length
32  * @stream: File stream to read from
33  * @line: Pointer to a variable storing the file line number
34  * @_pos: Buffer for the pointer to the beginning of data on the text line or
35  * %NULL if not needed (returned value used instead)
36  * Returns: Pointer to the beginning of data on the text line or %NULL if no
37  * more text lines are available.
38  *
39  * This function reads the next non-empty line from the configuration file and
40  * removes comments. The returned string is guaranteed to be null-terminated.
41  */
42 static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
43 				  char **_pos)
44 {
45 	char *pos, *end, *sstart;
46 
47 	while (fgets(s, size, stream)) {
48 		(*line)++;
49 		s[size - 1] = '\0';
50 		pos = s;
51 
52 		/* Skip white space from the beginning of line. */
53 		while (*pos == ' ' || *pos == '\t' || *pos == '\r')
54 			pos++;
55 
56 		/* Skip comment lines and empty lines */
57 		if (*pos == '#' || *pos == '\n' || *pos == '\0')
58 			continue;
59 
60 		/*
61 		 * Remove # comments unless they are within a double quoted
62 		 * string.
63 		 */
64 		sstart = os_strchr(pos, '"');
65 		if (sstart)
66 			sstart = os_strrchr(sstart + 1, '"');
67 		if (!sstart)
68 			sstart = pos;
69 		end = os_strchr(sstart, '#');
70 		if (end)
71 			*end-- = '\0';
72 		else
73 			end = pos + os_strlen(pos) - 1;
74 
75 		/* Remove trailing white space. */
76 		while (end > pos &&
77 		       (*end == '\n' || *end == ' ' || *end == '\t' ||
78 			*end == '\r'))
79 			*end-- = '\0';
80 
81 		if (*pos == '\0')
82 			continue;
83 
84 		if (_pos)
85 			*_pos = pos;
86 		return pos;
87 	}
88 
89 	if (_pos)
90 		*_pos = NULL;
91 	return NULL;
92 }
93 
94 
95 static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
96 {
97 	int errors = 0;
98 
99 	if (ssid->passphrase) {
100 		if (ssid->psk_set) {
101 			wpa_printf(MSG_ERROR, "Line %d: both PSK and "
102 				   "passphrase configured.", line);
103 			errors++;
104 		}
105 		wpa_config_update_psk(ssid);
106 	}
107 
108 	if ((ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
109 			       WPA_KEY_MGMT_PSK_SHA256)) &&
110 	    !ssid->psk_set) {
111 		wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
112 			   "management, but no PSK configured.", line);
113 		errors++;
114 	}
115 
116 	if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
117 	    !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
118 	    !(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
119 		/* Group cipher cannot be stronger than the pairwise cipher. */
120 		wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
121 			   " list since it was not allowed for pairwise "
122 			   "cipher", line);
123 		ssid->group_cipher &= ~WPA_CIPHER_CCMP;
124 	}
125 
126 	return errors;
127 }
128 
129 
130 static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
131 {
132 	struct wpa_ssid *ssid;
133 	int errors = 0, end = 0;
134 	char buf[256], *pos, *pos2;
135 
136 	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
137 		   *line);
138 	ssid = os_zalloc(sizeof(*ssid));
139 	if (ssid == NULL)
140 		return NULL;
141 	ssid->id = id;
142 
143 	wpa_config_set_network_defaults(ssid);
144 
145 	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
146 		if (os_strcmp(pos, "}") == 0) {
147 			end = 1;
148 			break;
149 		}
150 
151 		pos2 = os_strchr(pos, '=');
152 		if (pos2 == NULL) {
153 			wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
154 				   "'%s'.", *line, pos);
155 			errors++;
156 			continue;
157 		}
158 
159 		*pos2++ = '\0';
160 		if (*pos2 == '"') {
161 			if (os_strchr(pos2 + 1, '"') == NULL) {
162 				wpa_printf(MSG_ERROR, "Line %d: invalid "
163 					   "quotation '%s'.", *line, pos2);
164 				errors++;
165 				continue;
166 			}
167 		}
168 
169 		if (wpa_config_set(ssid, pos, pos2, *line) < 0)
170 			errors++;
171 	}
172 
173 	if (!end) {
174 		wpa_printf(MSG_ERROR, "Line %d: network block was not "
175 			   "terminated properly.", *line);
176 		errors++;
177 	}
178 
179 	errors += wpa_config_validate_network(ssid, *line);
180 
181 	if (errors) {
182 		wpa_config_free_ssid(ssid);
183 		ssid = NULL;
184 	}
185 
186 	return ssid;
187 }
188 
189 
190 #ifndef CONFIG_NO_CONFIG_BLOBS
191 static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
192 						     const char *name)
193 {
194 	struct wpa_config_blob *blob;
195 	char buf[256], *pos;
196 	unsigned char *encoded = NULL, *nencoded;
197 	int end = 0;
198 	size_t encoded_len = 0, len;
199 
200 	wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
201 		   *line, name);
202 
203 	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
204 		if (os_strcmp(pos, "}") == 0) {
205 			end = 1;
206 			break;
207 		}
208 
209 		len = os_strlen(pos);
210 		nencoded = os_realloc(encoded, encoded_len + len);
211 		if (nencoded == NULL) {
212 			wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
213 				   "blob", *line);
214 			os_free(encoded);
215 			return NULL;
216 		}
217 		encoded = nencoded;
218 		os_memcpy(encoded + encoded_len, pos, len);
219 		encoded_len += len;
220 	}
221 
222 	if (!end) {
223 		wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
224 			   "properly", *line);
225 		os_free(encoded);
226 		return NULL;
227 	}
228 
229 	blob = os_zalloc(sizeof(*blob));
230 	if (blob == NULL) {
231 		os_free(encoded);
232 		return NULL;
233 	}
234 	blob->name = os_strdup(name);
235 	blob->data = base64_decode(encoded, encoded_len, &blob->len);
236 	os_free(encoded);
237 
238 	if (blob->name == NULL || blob->data == NULL) {
239 		wpa_config_free_blob(blob);
240 		return NULL;
241 	}
242 
243 	return blob;
244 }
245 
246 
247 static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
248 				   int *line, char *bname)
249 {
250 	char *name_end;
251 	struct wpa_config_blob *blob;
252 
253 	name_end = os_strchr(bname, '=');
254 	if (name_end == NULL) {
255 		wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
256 			   *line);
257 		return -1;
258 	}
259 	*name_end = '\0';
260 
261 	blob = wpa_config_read_blob(f, line, bname);
262 	if (blob == NULL) {
263 		wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
264 			   *line, bname);
265 		return -1;
266 	}
267 	wpa_config_set_blob(config, blob);
268 	return 0;
269 }
270 #endif /* CONFIG_NO_CONFIG_BLOBS */
271 
272 
273 struct global_parse_data {
274 	char *name;
275 	int (*parser)(const struct global_parse_data *data,
276 		      struct wpa_config *config, int line, const char *value);
277 	void *param1, *param2, *param3;
278 };
279 
280 
281 static int wpa_config_parse_int(const struct global_parse_data *data,
282 				struct wpa_config *config, int line,
283 				const char *pos)
284 {
285 	int *dst;
286 	dst = (int *) (((u8 *) config) + (long) data->param1);
287 	*dst = atoi(pos);
288 	wpa_printf(MSG_DEBUG, "%s=%d", data->name, *dst);
289 
290 	if (data->param2 && *dst < (long) data->param2) {
291 		wpa_printf(MSG_ERROR, "Line %d: too small %s (value=%d "
292 			   "min_value=%ld)", line, data->name, *dst,
293 			   (long) data->param2);
294 		*dst = (long) data->param2;
295 		return -1;
296 	}
297 
298 	if (data->param3 && *dst > (long) data->param3) {
299 		wpa_printf(MSG_ERROR, "Line %d: too large %s (value=%d "
300 			   "max_value=%ld)", line, data->name, *dst,
301 			   (long) data->param3);
302 		*dst = (long) data->param3;
303 		return -1;
304 	}
305 
306 	return 0;
307 }
308 
309 
310 static int wpa_config_parse_str(const struct global_parse_data *data,
311 				struct wpa_config *config, int line,
312 				const char *pos)
313 {
314 	size_t len;
315 	char **dst, *tmp;
316 
317 	len = os_strlen(pos);
318 	if (data->param2 && len < (size_t) data->param2) {
319 		wpa_printf(MSG_ERROR, "Line %d: too short %s (len=%lu "
320 			   "min_len=%ld)", line, data->name,
321 			   (unsigned long) len, (long) data->param2);
322 		return -1;
323 	}
324 
325 	if (data->param3 && len > (size_t) data->param3) {
326 		wpa_printf(MSG_ERROR, "Line %d: too long %s (len=%lu "
327 			   "max_len=%ld)", line, data->name,
328 			   (unsigned long) len, (long) data->param3);
329 		return -1;
330 	}
331 
332 	tmp = os_strdup(pos);
333 	if (tmp == NULL)
334 		return -1;
335 
336 	dst = (char **) (((u8 *) config) + (long) data->param1);
337 	os_free(*dst);
338 	*dst = tmp;
339 	wpa_printf(MSG_DEBUG, "%s='%s'", data->name, *dst);
340 
341 	return 0;
342 }
343 
344 
345 static int wpa_config_process_country(const struct global_parse_data *data,
346 				      struct wpa_config *config, int line,
347 				      const char *pos)
348 {
349 	if (!pos[0] || !pos[1]) {
350 		wpa_printf(MSG_DEBUG, "Invalid country set");
351 		return -1;
352 	}
353 	config->country[0] = pos[0];
354 	config->country[1] = pos[1];
355 	wpa_printf(MSG_DEBUG, "country='%c%c'",
356 		   config->country[0], config->country[1]);
357 	return 0;
358 }
359 
360 
361 static int wpa_config_process_load_dynamic_eap(
362 	const struct global_parse_data *data, struct wpa_config *config,
363 	int line, const char *so)
364 {
365 	int ret;
366 	wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
367 	ret = eap_peer_method_load(so);
368 	if (ret == -2) {
369 		wpa_printf(MSG_DEBUG, "This EAP type was already loaded - not "
370 			   "reloading.");
371 	} else if (ret) {
372 		wpa_printf(MSG_ERROR, "Line %d: Failed to load dynamic EAP "
373 			   "method '%s'.", line, so);
374 		return -1;
375 	}
376 
377 	return 0;
378 }
379 
380 
381 #ifdef CONFIG_WPS
382 
383 static int wpa_config_process_uuid(const struct global_parse_data *data,
384 				   struct wpa_config *config, int line,
385 				   const char *pos)
386 {
387 	char buf[40];
388 	if (uuid_str2bin(pos, config->uuid)) {
389 		wpa_printf(MSG_ERROR, "Line %d: invalid UUID", line);
390 		return -1;
391 	}
392 	uuid_bin2str(config->uuid, buf, sizeof(buf));
393 	wpa_printf(MSG_DEBUG, "uuid=%s", buf);
394 	return 0;
395 }
396 
397 
398 static int wpa_config_process_os_version(const struct global_parse_data *data,
399 					 struct wpa_config *config, int line,
400 					 const char *pos)
401 {
402 	if (hexstr2bin(pos, config->os_version, 4)) {
403 		wpa_printf(MSG_ERROR, "Line %d: invalid os_version", line);
404 		return -1;
405 	}
406 	wpa_printf(MSG_DEBUG, "os_version=%08x",
407 		   WPA_GET_BE32(config->os_version));
408 	return 0;
409 }
410 
411 #endif /* CONFIG_WPS */
412 
413 
414 #ifdef OFFSET
415 #undef OFFSET
416 #endif /* OFFSET */
417 /* OFFSET: Get offset of a variable within the wpa_config structure */
418 #define OFFSET(v) ((void *) &((struct wpa_config *) 0)->v)
419 
420 #define FUNC(f) #f, wpa_config_process_ ## f, OFFSET(f), NULL, NULL
421 #define FUNC_NO_VAR(f) #f, wpa_config_process_ ## f, NULL, NULL, NULL
422 #define _INT(f) #f, wpa_config_parse_int, OFFSET(f)
423 #define INT(f) _INT(f), NULL, NULL
424 #define INT_RANGE(f, min, max) _INT(f), (void *) min, (void *) max
425 #define _STR(f) #f, wpa_config_parse_str, OFFSET(f)
426 #define STR(f) _STR(f), NULL, NULL
427 #define STR_RANGE(f, min, max) _STR(f), (void *) min, (void *) max
428 
429 static const struct global_parse_data global_fields[] = {
430 #ifdef CONFIG_CTRL_IFACE
431 	{ STR(ctrl_interface) },
432 	{ STR(ctrl_interface_group) } /* deprecated */,
433 #endif /* CONFIG_CTRL_IFACE */
434 	{ INT_RANGE(eapol_version, 1, 2) },
435 	{ INT(ap_scan) },
436 	{ INT(fast_reauth) },
437 #ifdef EAP_TLS_OPENSSL
438 	{ STR(opensc_engine_path) },
439 	{ STR(pkcs11_engine_path) },
440 	{ STR(pkcs11_module_path) },
441 #endif /* EAP_TLS_OPENSSL */
442 	{ STR(driver_param) },
443 	{ INT(dot11RSNAConfigPMKLifetime) },
444 	{ INT(dot11RSNAConfigPMKReauthThreshold) },
445 	{ INT(dot11RSNAConfigSATimeout) },
446 #ifndef CONFIG_NO_CONFIG_WRITE
447 	{ INT(update_config) },
448 #endif /* CONFIG_NO_CONFIG_WRITE */
449 	{ FUNC_NO_VAR(load_dynamic_eap) },
450 #ifdef CONFIG_WPS
451 	{ FUNC(uuid) },
452 	{ STR_RANGE(device_name, 0, 32) },
453 	{ STR_RANGE(manufacturer, 0, 64) },
454 	{ STR_RANGE(model_name, 0, 32) },
455 	{ STR_RANGE(model_number, 0, 32) },
456 	{ STR_RANGE(serial_number, 0, 32) },
457 	{ STR(device_type) },
458 	{ FUNC(os_version) },
459 	{ INT_RANGE(wps_cred_processing, 0, 2) },
460 #endif /* CONFIG_WPS */
461 	{ FUNC(country) }
462 };
463 
464 #undef FUNC
465 #undef _INT
466 #undef INT
467 #undef INT_RANGE
468 #undef _STR
469 #undef STR
470 #undef STR_RANGE
471 #define NUM_GLOBAL_FIELDS (sizeof(global_fields) / sizeof(global_fields[0]))
472 
473 
474 static int wpa_config_process_global(struct wpa_config *config, char *pos,
475 				     int line)
476 {
477 	size_t i;
478 	int ret = 0;
479 
480 	for (i = 0; i < NUM_GLOBAL_FIELDS; i++) {
481 		const struct global_parse_data *field = &global_fields[i];
482 		size_t flen = os_strlen(field->name);
483 		if (os_strncmp(pos, field->name, flen) != 0 ||
484 		    pos[flen] != '=')
485 			continue;
486 
487 		if (field->parser(field, config, line, pos + flen + 1)) {
488 			wpa_printf(MSG_ERROR, "Line %d: failed to "
489 				   "parse '%s'.", line, pos);
490 			ret = -1;
491 		}
492 		break;
493 	}
494 	if (i == NUM_GLOBAL_FIELDS) {
495 		wpa_printf(MSG_ERROR, "Line %d: unknown global field '%s'.",
496 			   line, pos);
497 		ret = -1;
498 	}
499 
500 	return ret;
501 }
502 
503 
504 struct wpa_config * wpa_config_read(const char *name)
505 {
506 	FILE *f;
507 	char buf[256], *pos;
508 	int errors = 0, line = 0;
509 	struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
510 	struct wpa_config *config;
511 	int id = 0;
512 
513 	config = wpa_config_alloc_empty(NULL, NULL);
514 	if (config == NULL)
515 		return NULL;
516 	wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
517 	f = fopen(name, "r");
518 	if (f == NULL) {
519 		os_free(config);
520 		return NULL;
521 	}
522 
523 	while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
524 		if (os_strcmp(pos, "network={") == 0) {
525 			ssid = wpa_config_read_network(f, &line, id++);
526 			if (ssid == NULL) {
527 				wpa_printf(MSG_ERROR, "Line %d: failed to "
528 					   "parse network block.", line);
529 				errors++;
530 				continue;
531 			}
532 			if (head == NULL) {
533 				head = tail = ssid;
534 			} else {
535 				tail->next = ssid;
536 				tail = ssid;
537 			}
538 			if (wpa_config_add_prio_network(config, ssid)) {
539 				wpa_printf(MSG_ERROR, "Line %d: failed to add "
540 					   "network block to priority list.",
541 					   line);
542 				errors++;
543 				continue;
544 			}
545 #ifndef CONFIG_NO_CONFIG_BLOBS
546 		} else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
547 			if (wpa_config_process_blob(config, f, &line, pos + 12)
548 			    < 0) {
549 				errors++;
550 				continue;
551 			}
552 #endif /* CONFIG_NO_CONFIG_BLOBS */
553 		} else if (wpa_config_process_global(config, pos, line) < 0) {
554 			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
555 				   "line '%s'.", line, pos);
556 			errors++;
557 			continue;
558 		}
559 	}
560 
561 	fclose(f);
562 
563 	config->ssid = head;
564 	wpa_config_debug_dump_networks(config);
565 
566 	if (errors) {
567 		wpa_config_free(config);
568 		config = NULL;
569 		head = NULL;
570 	}
571 
572 	return config;
573 }
574 
575 
576 #ifndef CONFIG_NO_CONFIG_WRITE
577 
578 static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
579 {
580 	char *value = wpa_config_get(ssid, field);
581 	if (value == NULL)
582 		return;
583 	fprintf(f, "\t%s=%s\n", field, value);
584 	os_free(value);
585 }
586 
587 
588 static void write_int(FILE *f, const char *field, int value, int def)
589 {
590 	if (value == def)
591 		return;
592 	fprintf(f, "\t%s=%d\n", field, value);
593 }
594 
595 
596 static void write_bssid(FILE *f, struct wpa_ssid *ssid)
597 {
598 	char *value = wpa_config_get(ssid, "bssid");
599 	if (value == NULL)
600 		return;
601 	fprintf(f, "\tbssid=%s\n", value);
602 	os_free(value);
603 }
604 
605 
606 static void write_psk(FILE *f, struct wpa_ssid *ssid)
607 {
608 	char *value = wpa_config_get(ssid, "psk");
609 	if (value == NULL)
610 		return;
611 	fprintf(f, "\tpsk=%s\n", value);
612 	os_free(value);
613 }
614 
615 
616 static void write_proto(FILE *f, struct wpa_ssid *ssid)
617 {
618 	char *value;
619 
620 	if (ssid->proto == DEFAULT_PROTO)
621 		return;
622 
623 	value = wpa_config_get(ssid, "proto");
624 	if (value == NULL)
625 		return;
626 	if (value[0])
627 		fprintf(f, "\tproto=%s\n", value);
628 	os_free(value);
629 }
630 
631 
632 static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
633 {
634 	char *value;
635 
636 	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
637 		return;
638 
639 	value = wpa_config_get(ssid, "key_mgmt");
640 	if (value == NULL)
641 		return;
642 	if (value[0])
643 		fprintf(f, "\tkey_mgmt=%s\n", value);
644 	os_free(value);
645 }
646 
647 
648 static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
649 {
650 	char *value;
651 
652 	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
653 		return;
654 
655 	value = wpa_config_get(ssid, "pairwise");
656 	if (value == NULL)
657 		return;
658 	if (value[0])
659 		fprintf(f, "\tpairwise=%s\n", value);
660 	os_free(value);
661 }
662 
663 
664 static void write_group(FILE *f, struct wpa_ssid *ssid)
665 {
666 	char *value;
667 
668 	if (ssid->group_cipher == DEFAULT_GROUP)
669 		return;
670 
671 	value = wpa_config_get(ssid, "group");
672 	if (value == NULL)
673 		return;
674 	if (value[0])
675 		fprintf(f, "\tgroup=%s\n", value);
676 	os_free(value);
677 }
678 
679 
680 static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
681 {
682 	char *value;
683 
684 	if (ssid->auth_alg == 0)
685 		return;
686 
687 	value = wpa_config_get(ssid, "auth_alg");
688 	if (value == NULL)
689 		return;
690 	if (value[0])
691 		fprintf(f, "\tauth_alg=%s\n", value);
692 	os_free(value);
693 }
694 
695 
696 #ifdef IEEE8021X_EAPOL
697 static void write_eap(FILE *f, struct wpa_ssid *ssid)
698 {
699 	char *value;
700 
701 	value = wpa_config_get(ssid, "eap");
702 	if (value == NULL)
703 		return;
704 
705 	if (value[0])
706 		fprintf(f, "\teap=%s\n", value);
707 	os_free(value);
708 }
709 #endif /* IEEE8021X_EAPOL */
710 
711 
712 static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
713 {
714 	char field[20], *value;
715 	int res;
716 
717 	res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
718 	if (res < 0 || (size_t) res >= sizeof(field))
719 		return;
720 	value = wpa_config_get(ssid, field);
721 	if (value) {
722 		fprintf(f, "\t%s=%s\n", field, value);
723 		os_free(value);
724 	}
725 }
726 
727 
728 static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
729 {
730 	int i;
731 
732 #define STR(t) write_str(f, #t, ssid)
733 #define INT(t) write_int(f, #t, ssid->t, 0)
734 #define INTe(t) write_int(f, #t, ssid->eap.t, 0)
735 #define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
736 #define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
737 
738 	STR(ssid);
739 	INT(scan_ssid);
740 	write_bssid(f, ssid);
741 	write_psk(f, ssid);
742 	write_proto(f, ssid);
743 	write_key_mgmt(f, ssid);
744 	write_pairwise(f, ssid);
745 	write_group(f, ssid);
746 	write_auth_alg(f, ssid);
747 #ifdef IEEE8021X_EAPOL
748 	write_eap(f, ssid);
749 	STR(identity);
750 	STR(anonymous_identity);
751 	STR(password);
752 	STR(ca_cert);
753 	STR(ca_path);
754 	STR(client_cert);
755 	STR(private_key);
756 	STR(private_key_passwd);
757 	STR(dh_file);
758 	STR(subject_match);
759 	STR(altsubject_match);
760 	STR(ca_cert2);
761 	STR(ca_path2);
762 	STR(client_cert2);
763 	STR(private_key2);
764 	STR(private_key2_passwd);
765 	STR(dh_file2);
766 	STR(subject_match2);
767 	STR(altsubject_match2);
768 	STR(phase1);
769 	STR(phase2);
770 	STR(pcsc);
771 	STR(pin);
772 	STR(engine_id);
773 	STR(key_id);
774 	STR(cert_id);
775 	STR(ca_cert_id);
776 	STR(key2_id);
777 	STR(pin2);
778 	STR(engine2_id);
779 	STR(cert2_id);
780 	STR(ca_cert2_id);
781 	INTe(engine);
782 	INTe(engine2);
783 	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
784 #endif /* IEEE8021X_EAPOL */
785 	for (i = 0; i < 4; i++)
786 		write_wep_key(f, i, ssid);
787 	INT(wep_tx_keyidx);
788 	INT(priority);
789 #ifdef IEEE8021X_EAPOL
790 	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
791 	STR(pac_file);
792 	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
793 #endif /* IEEE8021X_EAPOL */
794 	INT(mode);
795 	INT(proactive_key_caching);
796 	INT(disabled);
797 	INT(peerkey);
798 #ifdef CONFIG_IEEE80211W
799 	INT(ieee80211w);
800 #endif /* CONFIG_IEEE80211W */
801 	STR(id_str);
802 
803 #undef STR
804 #undef INT
805 #undef INT_DEF
806 }
807 
808 
809 #ifndef CONFIG_NO_CONFIG_BLOBS
810 static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
811 {
812 	unsigned char *encoded;
813 
814 	encoded = base64_encode(blob->data, blob->len, NULL);
815 	if (encoded == NULL)
816 		return -1;
817 
818 	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
819 	os_free(encoded);
820 	return 0;
821 }
822 #endif /* CONFIG_NO_CONFIG_BLOBS */
823 
824 
825 static void wpa_config_write_global(FILE *f, struct wpa_config *config)
826 {
827 #ifdef CONFIG_CTRL_IFACE
828 	if (config->ctrl_interface)
829 		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
830 	if (config->ctrl_interface_group)
831 		fprintf(f, "ctrl_interface_group=%s\n",
832 			config->ctrl_interface_group);
833 #endif /* CONFIG_CTRL_IFACE */
834 	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
835 		fprintf(f, "eapol_version=%d\n", config->eapol_version);
836 	if (config->ap_scan != DEFAULT_AP_SCAN)
837 		fprintf(f, "ap_scan=%d\n", config->ap_scan);
838 	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
839 		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
840 #ifdef EAP_TLS_OPENSSL
841 	if (config->opensc_engine_path)
842 		fprintf(f, "opensc_engine_path=%s\n",
843 			config->opensc_engine_path);
844 	if (config->pkcs11_engine_path)
845 		fprintf(f, "pkcs11_engine_path=%s\n",
846 			config->pkcs11_engine_path);
847 	if (config->pkcs11_module_path)
848 		fprintf(f, "pkcs11_module_path=%s\n",
849 			config->pkcs11_module_path);
850 #endif /* EAP_TLS_OPENSSL */
851 	if (config->driver_param)
852 		fprintf(f, "driver_param=%s\n", config->driver_param);
853 	if (config->dot11RSNAConfigPMKLifetime)
854 		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
855 			config->dot11RSNAConfigPMKLifetime);
856 	if (config->dot11RSNAConfigPMKReauthThreshold)
857 		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
858 			config->dot11RSNAConfigPMKReauthThreshold);
859 	if (config->dot11RSNAConfigSATimeout)
860 		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
861 			config->dot11RSNAConfigSATimeout);
862 	if (config->update_config)
863 		fprintf(f, "update_config=%d\n", config->update_config);
864 #ifdef CONFIG_WPS
865 	if (!is_nil_uuid(config->uuid)) {
866 		char buf[40];
867 		uuid_bin2str(config->uuid, buf, sizeof(buf));
868 		fprintf(f, "uuid=%s\n", buf);
869 	}
870 	if (config->device_name)
871 		fprintf(f, "device_name=%s\n", config->device_name);
872 	if (config->manufacturer)
873 		fprintf(f, "manufacturer=%s\n", config->manufacturer);
874 	if (config->model_name)
875 		fprintf(f, "model_name=%s\n", config->model_name);
876 	if (config->model_number)
877 		fprintf(f, "model_number=%s\n", config->model_number);
878 	if (config->serial_number)
879 		fprintf(f, "serial_number=%s\n", config->serial_number);
880 	if (config->device_type)
881 		fprintf(f, "device_type=%s\n", config->device_type);
882 	if (WPA_GET_BE32(config->os_version))
883 		fprintf(f, "os_version=%08x\n",
884 			WPA_GET_BE32(config->os_version));
885 	if (config->wps_cred_processing)
886 		fprintf(f, "wps_cred_processing=%d\n",
887 			config->wps_cred_processing);
888 #endif /* CONFIG_WPS */
889 	if (config->country[0] && config->country[1]) {
890 		fprintf(f, "country=%c%c\n",
891 			config->country[0], config->country[1]);
892 	}
893 }
894 
895 #endif /* CONFIG_NO_CONFIG_WRITE */
896 
897 
898 int wpa_config_write(const char *name, struct wpa_config *config)
899 {
900 #ifndef CONFIG_NO_CONFIG_WRITE
901 	FILE *f;
902 	struct wpa_ssid *ssid;
903 #ifndef CONFIG_NO_CONFIG_BLOBS
904 	struct wpa_config_blob *blob;
905 #endif /* CONFIG_NO_CONFIG_BLOBS */
906 	int ret = 0;
907 
908 	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
909 
910 	f = fopen(name, "w");
911 	if (f == NULL) {
912 		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
913 		return -1;
914 	}
915 
916 	wpa_config_write_global(f, config);
917 
918 	for (ssid = config->ssid; ssid; ssid = ssid->next) {
919 		if (ssid->key_mgmt == WPA_KEY_MGMT_WPS)
920 			continue; /* do not save temporary WPS networks */
921 		fprintf(f, "\nnetwork={\n");
922 		wpa_config_write_network(f, ssid);
923 		fprintf(f, "}\n");
924 	}
925 
926 #ifndef CONFIG_NO_CONFIG_BLOBS
927 	for (blob = config->blobs; blob; blob = blob->next) {
928 		ret = wpa_config_write_blob(f, blob);
929 		if (ret)
930 			break;
931 	}
932 #endif /* CONFIG_NO_CONFIG_BLOBS */
933 
934 	fclose(f);
935 
936 	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
937 		   name, ret ? "un" : "");
938 	return ret;
939 #else /* CONFIG_NO_CONFIG_WRITE */
940 	return -1;
941 #endif /* CONFIG_NO_CONFIG_WRITE */
942 }
943