1 /*
2 * DPP functionality shared between hostapd and wpa_supplicant
3 * Copyright (c) 2017, Qualcomm Atheros, Inc.
4 * Copyright (c) 2018-2020, The Linux Foundation
5 *
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
8 */
9
10 #include "utils/includes.h"
11 #include <openssl/opensslv.h>
12 #include <openssl/err.h>
13
14 #include "utils/common.h"
15 #include "utils/base64.h"
16 #include "utils/json.h"
17 #include "common/ieee802_11_common.h"
18 #include "common/wpa_ctrl.h"
19 #include "common/gas.h"
20 #include "eap_common/eap_defs.h"
21 #include "crypto/crypto.h"
22 #include "crypto/random.h"
23 #include "crypto/aes.h"
24 #include "crypto/aes_siv.h"
25 #include "drivers/driver.h"
26 #include "dpp.h"
27 #include "dpp_i.h"
28
29
30 static const char * dpp_netrole_str(enum dpp_netrole netrole);
31
32 #ifdef CONFIG_TESTING_OPTIONS
33 #ifdef CONFIG_DPP2
34 int dpp_version_override = 2;
35 #else
36 int dpp_version_override = 1;
37 #endif
38 enum dpp_test_behavior dpp_test = DPP_TEST_DISABLED;
39 #endif /* CONFIG_TESTING_OPTIONS */
40
41 #if OPENSSL_VERSION_NUMBER < 0x10100000L || \
42 (defined(LIBRESSL_VERSION_NUMBER) && \
43 LIBRESSL_VERSION_NUMBER < 0x20700000L)
44 /* Compatibility wrappers for older versions. */
45
46 #ifdef CONFIG_DPP2
EVP_PKEY_get0_EC_KEY(EVP_PKEY * pkey)47 static EC_KEY * EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
48 {
49 if (pkey->type != EVP_PKEY_EC)
50 return NULL;
51 return pkey->pkey.ec;
52 }
53 #endif /* CONFIG_DPP2 */
54
55 #endif
56
57
dpp_auth_fail(struct dpp_authentication * auth,const char * txt)58 void dpp_auth_fail(struct dpp_authentication *auth, const char *txt)
59 {
60 wpa_msg(auth->msg_ctx, MSG_INFO, DPP_EVENT_FAIL "%s", txt);
61 }
62
63
dpp_alloc_msg(enum dpp_public_action_frame_type type,size_t len)64 struct wpabuf * dpp_alloc_msg(enum dpp_public_action_frame_type type,
65 size_t len)
66 {
67 struct wpabuf *msg;
68
69 msg = wpabuf_alloc(8 + len);
70 if (!msg)
71 return NULL;
72 wpabuf_put_u8(msg, WLAN_ACTION_PUBLIC);
73 wpabuf_put_u8(msg, WLAN_PA_VENDOR_SPECIFIC);
74 wpabuf_put_be24(msg, OUI_WFA);
75 wpabuf_put_u8(msg, DPP_OUI_TYPE);
76 wpabuf_put_u8(msg, 1); /* Crypto Suite */
77 wpabuf_put_u8(msg, type);
78 return msg;
79 }
80
81
dpp_get_attr(const u8 * buf,size_t len,u16 req_id,u16 * ret_len)82 const u8 * dpp_get_attr(const u8 *buf, size_t len, u16 req_id, u16 *ret_len)
83 {
84 u16 id, alen;
85 const u8 *pos = buf, *end = buf + len;
86
87 while (end - pos >= 4) {
88 id = WPA_GET_LE16(pos);
89 pos += 2;
90 alen = WPA_GET_LE16(pos);
91 pos += 2;
92 if (alen > end - pos)
93 return NULL;
94 if (id == req_id) {
95 *ret_len = alen;
96 return pos;
97 }
98 pos += alen;
99 }
100
101 return NULL;
102 }
103
104
dpp_get_attr_next(const u8 * prev,const u8 * buf,size_t len,u16 req_id,u16 * ret_len)105 static const u8 * dpp_get_attr_next(const u8 *prev, const u8 *buf, size_t len,
106 u16 req_id, u16 *ret_len)
107 {
108 u16 id, alen;
109 const u8 *pos, *end = buf + len;
110
111 if (!prev)
112 pos = buf;
113 else
114 pos = prev + WPA_GET_LE16(prev - 2);
115 while (end - pos >= 4) {
116 id = WPA_GET_LE16(pos);
117 pos += 2;
118 alen = WPA_GET_LE16(pos);
119 pos += 2;
120 if (alen > end - pos)
121 return NULL;
122 if (id == req_id) {
123 *ret_len = alen;
124 return pos;
125 }
126 pos += alen;
127 }
128
129 return NULL;
130 }
131
132
dpp_check_attrs(const u8 * buf,size_t len)133 int dpp_check_attrs(const u8 *buf, size_t len)
134 {
135 const u8 *pos, *end;
136 int wrapped_data = 0;
137
138 pos = buf;
139 end = buf + len;
140 while (end - pos >= 4) {
141 u16 id, alen;
142
143 id = WPA_GET_LE16(pos);
144 pos += 2;
145 alen = WPA_GET_LE16(pos);
146 pos += 2;
147 wpa_printf(MSG_MSGDUMP, "DPP: Attribute ID %04x len %u",
148 id, alen);
149 if (alen > end - pos) {
150 wpa_printf(MSG_DEBUG,
151 "DPP: Truncated message - not enough room for the attribute - dropped");
152 return -1;
153 }
154 if (wrapped_data) {
155 wpa_printf(MSG_DEBUG,
156 "DPP: An unexpected attribute included after the Wrapped Data attribute");
157 return -1;
158 }
159 if (id == DPP_ATTR_WRAPPED_DATA)
160 wrapped_data = 1;
161 pos += alen;
162 }
163
164 if (end != pos) {
165 wpa_printf(MSG_DEBUG,
166 "DPP: Unexpected octets (%d) after the last attribute",
167 (int) (end - pos));
168 return -1;
169 }
170
171 return 0;
172 }
173
174
dpp_bootstrap_info_free(struct dpp_bootstrap_info * info)175 void dpp_bootstrap_info_free(struct dpp_bootstrap_info *info)
176 {
177 if (!info)
178 return;
179 os_free(info->uri);
180 os_free(info->info);
181 os_free(info->chan);
182 os_free(info->pk);
183 EVP_PKEY_free(info->pubkey);
184 str_clear_free(info->configurator_params);
185 os_free(info);
186 }
187
188
dpp_bootstrap_type_txt(enum dpp_bootstrap_type type)189 const char * dpp_bootstrap_type_txt(enum dpp_bootstrap_type type)
190 {
191 switch (type) {
192 case DPP_BOOTSTRAP_QR_CODE:
193 return "QRCODE";
194 case DPP_BOOTSTRAP_PKEX:
195 return "PKEX";
196 case DPP_BOOTSTRAP_NFC_URI:
197 return "NFC-URI";
198 }
199 return "??";
200 }
201
202
dpp_uri_valid_info(const char * info)203 static int dpp_uri_valid_info(const char *info)
204 {
205 while (*info) {
206 unsigned char val = *info++;
207
208 if (val < 0x20 || val > 0x7e || val == 0x3b)
209 return 0;
210 }
211
212 return 1;
213 }
214
215
dpp_clone_uri(struct dpp_bootstrap_info * bi,const char * uri)216 static int dpp_clone_uri(struct dpp_bootstrap_info *bi, const char *uri)
217 {
218 bi->uri = os_strdup(uri);
219 return bi->uri ? 0 : -1;
220 }
221
222
dpp_parse_uri_chan_list(struct dpp_bootstrap_info * bi,const char * chan_list)223 int dpp_parse_uri_chan_list(struct dpp_bootstrap_info *bi,
224 const char *chan_list)
225 {
226 const char *pos = chan_list, *pos2;
227 int opclass = -1, channel, freq;
228
229 while (pos && *pos && *pos != ';') {
230 pos2 = pos;
231 while (*pos2 >= '0' && *pos2 <= '9')
232 pos2++;
233 if (*pos2 == '/') {
234 opclass = atoi(pos);
235 pos = pos2 + 1;
236 }
237 if (opclass <= 0)
238 goto fail;
239 channel = atoi(pos);
240 if (channel <= 0)
241 goto fail;
242 while (*pos >= '0' && *pos <= '9')
243 pos++;
244 freq = ieee80211_chan_to_freq(NULL, opclass, channel);
245 wpa_printf(MSG_DEBUG,
246 "DPP: URI channel-list: opclass=%d channel=%d ==> freq=%d",
247 opclass, channel, freq);
248 bi->channels_listed = true;
249 if (freq < 0) {
250 wpa_printf(MSG_DEBUG,
251 "DPP: Ignore unknown URI channel-list channel (opclass=%d channel=%d)",
252 opclass, channel);
253 } else if (bi->num_freq == DPP_BOOTSTRAP_MAX_FREQ) {
254 wpa_printf(MSG_DEBUG,
255 "DPP: Too many channels in URI channel-list - ignore list");
256 bi->num_freq = 0;
257 break;
258 } else {
259 bi->freq[bi->num_freq++] = freq;
260 }
261
262 if (*pos == ';' || *pos == '\0')
263 break;
264 if (*pos != ',')
265 goto fail;
266 pos++;
267 }
268
269 return 0;
270 fail:
271 wpa_printf(MSG_DEBUG, "DPP: Invalid URI channel-list");
272 return -1;
273 }
274
275
dpp_parse_uri_mac(struct dpp_bootstrap_info * bi,const char * mac)276 int dpp_parse_uri_mac(struct dpp_bootstrap_info *bi, const char *mac)
277 {
278 if (!mac)
279 return 0;
280
281 if (hwaddr_aton2(mac, bi->mac_addr) < 0) {
282 wpa_printf(MSG_DEBUG, "DPP: Invalid URI mac");
283 return -1;
284 }
285
286 wpa_printf(MSG_DEBUG, "DPP: URI mac: " MACSTR, MAC2STR(bi->mac_addr));
287
288 return 0;
289 }
290
291
dpp_parse_uri_info(struct dpp_bootstrap_info * bi,const char * info)292 int dpp_parse_uri_info(struct dpp_bootstrap_info *bi, const char *info)
293 {
294 const char *end;
295
296 if (!info)
297 return 0;
298
299 end = os_strchr(info, ';');
300 if (!end)
301 end = info + os_strlen(info);
302 bi->info = os_malloc(end - info + 1);
303 if (!bi->info)
304 return -1;
305 os_memcpy(bi->info, info, end - info);
306 bi->info[end - info] = '\0';
307 wpa_printf(MSG_DEBUG, "DPP: URI(information): %s", bi->info);
308 if (!dpp_uri_valid_info(bi->info)) {
309 wpa_printf(MSG_DEBUG, "DPP: Invalid URI information payload");
310 return -1;
311 }
312
313 return 0;
314 }
315
316
dpp_parse_uri_version(struct dpp_bootstrap_info * bi,const char * version)317 int dpp_parse_uri_version(struct dpp_bootstrap_info *bi, const char *version)
318 {
319 #ifdef CONFIG_DPP2
320 if (!version || DPP_VERSION < 2)
321 return 0;
322
323 if (*version == '1')
324 bi->version = 1;
325 else if (*version == '2')
326 bi->version = 2;
327 else
328 wpa_printf(MSG_DEBUG, "DPP: Unknown URI version");
329
330 wpa_printf(MSG_DEBUG, "DPP: URI version: %d", bi->version);
331 #endif /* CONFIG_DPP2 */
332
333 return 0;
334 }
335
336
dpp_parse_uri_pk(struct dpp_bootstrap_info * bi,const char * info)337 static int dpp_parse_uri_pk(struct dpp_bootstrap_info *bi, const char *info)
338 {
339 u8 *data;
340 size_t data_len;
341 int res;
342 const char *end;
343
344 end = os_strchr(info, ';');
345 if (!end)
346 return -1;
347
348 data = base64_decode(info, end - info, &data_len);
349 if (!data) {
350 wpa_printf(MSG_DEBUG,
351 "DPP: Invalid base64 encoding on URI public-key");
352 return -1;
353 }
354 wpa_hexdump(MSG_DEBUG, "DPP: Base64 decoded URI public-key",
355 data, data_len);
356
357 res = dpp_get_subject_public_key(bi, data, data_len);
358 os_free(data);
359 return res;
360 }
361
362
dpp_parse_uri(const char * uri)363 static struct dpp_bootstrap_info * dpp_parse_uri(const char *uri)
364 {
365 const char *pos = uri;
366 const char *end;
367 const char *chan_list = NULL, *mac = NULL, *info = NULL, *pk = NULL;
368 const char *version = NULL;
369 struct dpp_bootstrap_info *bi;
370
371 wpa_hexdump_ascii(MSG_DEBUG, "DPP: URI", uri, os_strlen(uri));
372
373 if (os_strncmp(pos, "DPP:", 4) != 0) {
374 wpa_printf(MSG_INFO, "DPP: Not a DPP URI");
375 return NULL;
376 }
377 pos += 4;
378
379 for (;;) {
380 end = os_strchr(pos, ';');
381 if (!end)
382 break;
383
384 if (end == pos) {
385 /* Handle terminating ";;" and ignore unexpected ";"
386 * for parsing robustness. */
387 pos++;
388 continue;
389 }
390
391 if (pos[0] == 'C' && pos[1] == ':' && !chan_list)
392 chan_list = pos + 2;
393 else if (pos[0] == 'M' && pos[1] == ':' && !mac)
394 mac = pos + 2;
395 else if (pos[0] == 'I' && pos[1] == ':' && !info)
396 info = pos + 2;
397 else if (pos[0] == 'K' && pos[1] == ':' && !pk)
398 pk = pos + 2;
399 else if (pos[0] == 'V' && pos[1] == ':' && !version)
400 version = pos + 2;
401 else
402 wpa_hexdump_ascii(MSG_DEBUG,
403 "DPP: Ignore unrecognized URI parameter",
404 pos, end - pos);
405 pos = end + 1;
406 }
407
408 if (!pk) {
409 wpa_printf(MSG_INFO, "DPP: URI missing public-key");
410 return NULL;
411 }
412
413 bi = os_zalloc(sizeof(*bi));
414 if (!bi)
415 return NULL;
416
417 if (dpp_clone_uri(bi, uri) < 0 ||
418 dpp_parse_uri_chan_list(bi, chan_list) < 0 ||
419 dpp_parse_uri_mac(bi, mac) < 0 ||
420 dpp_parse_uri_info(bi, info) < 0 ||
421 dpp_parse_uri_version(bi, version) < 0 ||
422 dpp_parse_uri_pk(bi, pk) < 0) {
423 dpp_bootstrap_info_free(bi);
424 bi = NULL;
425 }
426
427 return bi;
428 }
429
430
dpp_build_attr_status(struct wpabuf * msg,enum dpp_status_error status)431 void dpp_build_attr_status(struct wpabuf *msg, enum dpp_status_error status)
432 {
433 wpa_printf(MSG_DEBUG, "DPP: Status %d", status);
434 wpabuf_put_le16(msg, DPP_ATTR_STATUS);
435 wpabuf_put_le16(msg, 1);
436 wpabuf_put_u8(msg, status);
437 }
438
439
dpp_build_attr_r_bootstrap_key_hash(struct wpabuf * msg,const u8 * hash)440 void dpp_build_attr_r_bootstrap_key_hash(struct wpabuf *msg, const u8 *hash)
441 {
442 if (hash) {
443 wpa_printf(MSG_DEBUG, "DPP: R-Bootstrap Key Hash");
444 wpabuf_put_le16(msg, DPP_ATTR_R_BOOTSTRAP_KEY_HASH);
445 wpabuf_put_le16(msg, SHA256_MAC_LEN);
446 wpabuf_put_data(msg, hash, SHA256_MAC_LEN);
447 }
448 }
449
450
dpp_channel_ok_init(struct hostapd_hw_modes * own_modes,u16 num_modes,unsigned int freq)451 static int dpp_channel_ok_init(struct hostapd_hw_modes *own_modes,
452 u16 num_modes, unsigned int freq)
453 {
454 u16 m;
455 int c, flag;
456
457 if (!own_modes || !num_modes)
458 return 1;
459
460 for (m = 0; m < num_modes; m++) {
461 for (c = 0; c < own_modes[m].num_channels; c++) {
462 if ((unsigned int) own_modes[m].channels[c].freq !=
463 freq)
464 continue;
465 flag = own_modes[m].channels[c].flag;
466 if (!(flag & (HOSTAPD_CHAN_DISABLED |
467 HOSTAPD_CHAN_NO_IR |
468 HOSTAPD_CHAN_RADAR)))
469 return 1;
470 }
471 }
472
473 wpa_printf(MSG_DEBUG, "DPP: Peer channel %u MHz not supported", freq);
474 return 0;
475 }
476
477
freq_included(const unsigned int freqs[],unsigned int num,unsigned int freq)478 static int freq_included(const unsigned int freqs[], unsigned int num,
479 unsigned int freq)
480 {
481 while (num > 0) {
482 if (freqs[--num] == freq)
483 return 1;
484 }
485 return 0;
486 }
487
488
freq_to_start(unsigned int freqs[],unsigned int num,unsigned int freq)489 static void freq_to_start(unsigned int freqs[], unsigned int num,
490 unsigned int freq)
491 {
492 unsigned int i;
493
494 for (i = 0; i < num; i++) {
495 if (freqs[i] == freq)
496 break;
497 }
498 if (i == 0 || i >= num)
499 return;
500 os_memmove(&freqs[1], &freqs[0], i * sizeof(freqs[0]));
501 freqs[0] = freq;
502 }
503
504
dpp_channel_intersect(struct dpp_authentication * auth,struct hostapd_hw_modes * own_modes,u16 num_modes)505 static int dpp_channel_intersect(struct dpp_authentication *auth,
506 struct hostapd_hw_modes *own_modes,
507 u16 num_modes)
508 {
509 struct dpp_bootstrap_info *peer_bi = auth->peer_bi;
510 unsigned int i, freq;
511
512 for (i = 0; i < peer_bi->num_freq; i++) {
513 freq = peer_bi->freq[i];
514 if (freq_included(auth->freq, auth->num_freq, freq))
515 continue;
516 if (dpp_channel_ok_init(own_modes, num_modes, freq))
517 auth->freq[auth->num_freq++] = freq;
518 }
519 if (!auth->num_freq) {
520 wpa_printf(MSG_INFO,
521 "DPP: No available channels for initiating DPP Authentication");
522 return -1;
523 }
524 auth->curr_freq = auth->freq[0];
525 return 0;
526 }
527
528
dpp_channel_local_list(struct dpp_authentication * auth,struct hostapd_hw_modes * own_modes,u16 num_modes)529 static int dpp_channel_local_list(struct dpp_authentication *auth,
530 struct hostapd_hw_modes *own_modes,
531 u16 num_modes)
532 {
533 u16 m;
534 int c, flag;
535 unsigned int freq;
536
537 auth->num_freq = 0;
538
539 if (!own_modes || !num_modes) {
540 auth->freq[0] = 2412;
541 auth->freq[1] = 2437;
542 auth->freq[2] = 2462;
543 auth->num_freq = 3;
544 return 0;
545 }
546
547 for (m = 0; m < num_modes; m++) {
548 for (c = 0; c < own_modes[m].num_channels; c++) {
549 freq = own_modes[m].channels[c].freq;
550 flag = own_modes[m].channels[c].flag;
551 if (flag & (HOSTAPD_CHAN_DISABLED |
552 HOSTAPD_CHAN_NO_IR |
553 HOSTAPD_CHAN_RADAR))
554 continue;
555 if (freq_included(auth->freq, auth->num_freq, freq))
556 continue;
557 auth->freq[auth->num_freq++] = freq;
558 if (auth->num_freq == DPP_BOOTSTRAP_MAX_FREQ) {
559 m = num_modes;
560 break;
561 }
562 }
563 }
564
565 return auth->num_freq == 0 ? -1 : 0;
566 }
567
568
dpp_prepare_channel_list(struct dpp_authentication * auth,unsigned int neg_freq,struct hostapd_hw_modes * own_modes,u16 num_modes)569 int dpp_prepare_channel_list(struct dpp_authentication *auth,
570 unsigned int neg_freq,
571 struct hostapd_hw_modes *own_modes, u16 num_modes)
572 {
573 int res;
574 char freqs[DPP_BOOTSTRAP_MAX_FREQ * 6 + 10], *pos, *end;
575 unsigned int i;
576
577 if (!own_modes) {
578 if (!neg_freq)
579 return -1;
580 auth->num_freq = 1;
581 auth->freq[0] = neg_freq;
582 auth->curr_freq = neg_freq;
583 return 0;
584 }
585
586 if (auth->peer_bi->num_freq > 0)
587 res = dpp_channel_intersect(auth, own_modes, num_modes);
588 else
589 res = dpp_channel_local_list(auth, own_modes, num_modes);
590 if (res < 0)
591 return res;
592
593 /* Prioritize 2.4 GHz channels 6, 1, 11 (in this order) to hit the most
594 * likely channels first. */
595 freq_to_start(auth->freq, auth->num_freq, 2462);
596 freq_to_start(auth->freq, auth->num_freq, 2412);
597 freq_to_start(auth->freq, auth->num_freq, 2437);
598
599 auth->freq_idx = 0;
600 auth->curr_freq = auth->freq[0];
601
602 pos = freqs;
603 end = pos + sizeof(freqs);
604 for (i = 0; i < auth->num_freq; i++) {
605 res = os_snprintf(pos, end - pos, " %u", auth->freq[i]);
606 if (os_snprintf_error(end - pos, res))
607 break;
608 pos += res;
609 }
610 *pos = '\0';
611 wpa_printf(MSG_DEBUG, "DPP: Possible frequencies for initiating:%s",
612 freqs);
613
614 return 0;
615 }
616
617
dpp_gen_uri(struct dpp_bootstrap_info * bi)618 int dpp_gen_uri(struct dpp_bootstrap_info *bi)
619 {
620 char macstr[ETH_ALEN * 2 + 10];
621 size_t len;
622
623 len = 4; /* "DPP:" */
624 if (bi->chan)
625 len += 3 + os_strlen(bi->chan); /* C:...; */
626 if (is_zero_ether_addr(bi->mac_addr))
627 macstr[0] = '\0';
628 else
629 os_snprintf(macstr, sizeof(macstr), "M:" COMPACT_MACSTR ";",
630 MAC2STR(bi->mac_addr));
631 len += os_strlen(macstr); /* M:...; */
632 if (bi->info)
633 len += 3 + os_strlen(bi->info); /* I:...; */
634 #ifdef CONFIG_DPP2
635 len += 4; /* V:2; */
636 #endif /* CONFIG_DPP2 */
637 len += 4 + os_strlen(bi->pk); /* K:...;; */
638
639 os_free(bi->uri);
640 bi->uri = os_malloc(len + 1);
641 if (!bi->uri)
642 return -1;
643 os_snprintf(bi->uri, len + 1, "DPP:%s%s%s%s%s%s%s%sK:%s;;",
644 bi->chan ? "C:" : "", bi->chan ? bi->chan : "",
645 bi->chan ? ";" : "",
646 macstr,
647 bi->info ? "I:" : "", bi->info ? bi->info : "",
648 bi->info ? ";" : "",
649 DPP_VERSION == 2 ? "V:2;" : "",
650 bi->pk);
651 return 0;
652 }
653
654
655 struct dpp_authentication *
dpp_alloc_auth(struct dpp_global * dpp,void * msg_ctx)656 dpp_alloc_auth(struct dpp_global *dpp, void *msg_ctx)
657 {
658 struct dpp_authentication *auth;
659
660 auth = os_zalloc(sizeof(*auth));
661 if (!auth)
662 return NULL;
663 auth->global = dpp;
664 auth->msg_ctx = msg_ctx;
665 auth->conf_resp_status = 255;
666 return auth;
667 }
668
669
dpp_build_conf_req_attr(struct dpp_authentication * auth,const char * json)670 static struct wpabuf * dpp_build_conf_req_attr(struct dpp_authentication *auth,
671 const char *json)
672 {
673 size_t nonce_len;
674 size_t json_len, clear_len;
675 struct wpabuf *clear = NULL, *msg = NULL;
676 u8 *wrapped;
677 size_t attr_len;
678
679 wpa_printf(MSG_DEBUG, "DPP: Build configuration request");
680
681 nonce_len = auth->curve->nonce_len;
682 if (random_get_bytes(auth->e_nonce, nonce_len)) {
683 wpa_printf(MSG_ERROR, "DPP: Failed to generate E-nonce");
684 goto fail;
685 }
686 wpa_hexdump(MSG_DEBUG, "DPP: E-nonce", auth->e_nonce, nonce_len);
687 json_len = os_strlen(json);
688 wpa_hexdump_ascii(MSG_DEBUG, "DPP: configRequest JSON", json, json_len);
689
690 /* { E-nonce, configAttrib }ke */
691 clear_len = 4 + nonce_len + 4 + json_len;
692 clear = wpabuf_alloc(clear_len);
693 attr_len = 4 + clear_len + AES_BLOCK_SIZE;
694 #ifdef CONFIG_TESTING_OPTIONS
695 if (dpp_test == DPP_TEST_AFTER_WRAPPED_DATA_CONF_REQ)
696 attr_len += 5;
697 #endif /* CONFIG_TESTING_OPTIONS */
698 msg = wpabuf_alloc(attr_len);
699 if (!clear || !msg)
700 goto fail;
701
702 #ifdef CONFIG_TESTING_OPTIONS
703 if (dpp_test == DPP_TEST_NO_E_NONCE_CONF_REQ) {
704 wpa_printf(MSG_INFO, "DPP: TESTING - no E-nonce");
705 goto skip_e_nonce;
706 }
707 if (dpp_test == DPP_TEST_INVALID_E_NONCE_CONF_REQ) {
708 wpa_printf(MSG_INFO, "DPP: TESTING - invalid E-nonce");
709 wpabuf_put_le16(clear, DPP_ATTR_ENROLLEE_NONCE);
710 wpabuf_put_le16(clear, nonce_len - 1);
711 wpabuf_put_data(clear, auth->e_nonce, nonce_len - 1);
712 goto skip_e_nonce;
713 }
714 if (dpp_test == DPP_TEST_NO_WRAPPED_DATA_CONF_REQ) {
715 wpa_printf(MSG_INFO, "DPP: TESTING - no Wrapped Data");
716 goto skip_wrapped_data;
717 }
718 #endif /* CONFIG_TESTING_OPTIONS */
719
720 /* E-nonce */
721 wpabuf_put_le16(clear, DPP_ATTR_ENROLLEE_NONCE);
722 wpabuf_put_le16(clear, nonce_len);
723 wpabuf_put_data(clear, auth->e_nonce, nonce_len);
724
725 #ifdef CONFIG_TESTING_OPTIONS
726 skip_e_nonce:
727 if (dpp_test == DPP_TEST_NO_CONFIG_ATTR_OBJ_CONF_REQ) {
728 wpa_printf(MSG_INFO, "DPP: TESTING - no configAttrib");
729 goto skip_conf_attr_obj;
730 }
731 #endif /* CONFIG_TESTING_OPTIONS */
732
733 /* configAttrib */
734 wpabuf_put_le16(clear, DPP_ATTR_CONFIG_ATTR_OBJ);
735 wpabuf_put_le16(clear, json_len);
736 wpabuf_put_data(clear, json, json_len);
737
738 #ifdef CONFIG_TESTING_OPTIONS
739 skip_conf_attr_obj:
740 #endif /* CONFIG_TESTING_OPTIONS */
741
742 wpabuf_put_le16(msg, DPP_ATTR_WRAPPED_DATA);
743 wpabuf_put_le16(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
744 wrapped = wpabuf_put(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
745
746 /* No AES-SIV AD */
747 wpa_hexdump_buf(MSG_DEBUG, "DPP: AES-SIV cleartext", clear);
748 if (aes_siv_encrypt(auth->ke, auth->curve->hash_len,
749 wpabuf_head(clear), wpabuf_len(clear),
750 0, NULL, NULL, wrapped) < 0)
751 goto fail;
752 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV ciphertext",
753 wrapped, wpabuf_len(clear) + AES_BLOCK_SIZE);
754
755 #ifdef CONFIG_TESTING_OPTIONS
756 if (dpp_test == DPP_TEST_AFTER_WRAPPED_DATA_CONF_REQ) {
757 wpa_printf(MSG_INFO, "DPP: TESTING - attr after Wrapped Data");
758 dpp_build_attr_status(msg, DPP_STATUS_OK);
759 }
760 skip_wrapped_data:
761 #endif /* CONFIG_TESTING_OPTIONS */
762
763 wpa_hexdump_buf(MSG_DEBUG,
764 "DPP: Configuration Request frame attributes", msg);
765 wpabuf_free(clear);
766 return msg;
767
768 fail:
769 wpabuf_free(clear);
770 wpabuf_free(msg);
771 return NULL;
772 }
773
774
dpp_write_adv_proto(struct wpabuf * buf)775 void dpp_write_adv_proto(struct wpabuf *buf)
776 {
777 /* Advertisement Protocol IE */
778 wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
779 wpabuf_put_u8(buf, 8); /* Length */
780 wpabuf_put_u8(buf, 0x7f);
781 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
782 wpabuf_put_u8(buf, 5);
783 wpabuf_put_be24(buf, OUI_WFA);
784 wpabuf_put_u8(buf, DPP_OUI_TYPE);
785 wpabuf_put_u8(buf, 0x01);
786 }
787
788
dpp_write_gas_query(struct wpabuf * buf,struct wpabuf * query)789 void dpp_write_gas_query(struct wpabuf *buf, struct wpabuf *query)
790 {
791 /* GAS Query */
792 wpabuf_put_le16(buf, wpabuf_len(query));
793 wpabuf_put_buf(buf, query);
794 }
795
796
dpp_build_conf_req(struct dpp_authentication * auth,const char * json)797 struct wpabuf * dpp_build_conf_req(struct dpp_authentication *auth,
798 const char *json)
799 {
800 struct wpabuf *buf, *conf_req;
801
802 conf_req = dpp_build_conf_req_attr(auth, json);
803 if (!conf_req) {
804 wpa_printf(MSG_DEBUG,
805 "DPP: No configuration request data available");
806 return NULL;
807 }
808
809 buf = gas_build_initial_req(0, 10 + 2 + wpabuf_len(conf_req));
810 if (!buf) {
811 wpabuf_free(conf_req);
812 return NULL;
813 }
814
815 dpp_write_adv_proto(buf);
816 dpp_write_gas_query(buf, conf_req);
817 wpabuf_free(conf_req);
818 wpa_hexdump_buf(MSG_MSGDUMP, "DPP: GAS Config Request", buf);
819
820 return buf;
821 }
822
823
dpp_build_conf_req_helper(struct dpp_authentication * auth,const char * name,enum dpp_netrole netrole,const char * mud_url,int * opclasses)824 struct wpabuf * dpp_build_conf_req_helper(struct dpp_authentication *auth,
825 const char *name,
826 enum dpp_netrole netrole,
827 const char *mud_url, int *opclasses)
828 {
829 size_t len, name_len;
830 const char *tech = "infra";
831 const char *dpp_name;
832 struct wpabuf *buf, *json;
833 char *csr = NULL;
834
835 #ifdef CONFIG_TESTING_OPTIONS
836 if (dpp_test == DPP_TEST_INVALID_CONFIG_ATTR_OBJ_CONF_REQ) {
837 static const char *bogus_tech = "knfra";
838
839 wpa_printf(MSG_INFO, "DPP: TESTING - invalid Config Attr");
840 tech = bogus_tech;
841 }
842 #endif /* CONFIG_TESTING_OPTIONS */
843
844 dpp_name = name ? name : "Test";
845 name_len = os_strlen(dpp_name);
846
847 len = 100 + name_len * 6 + 1 + int_array_len(opclasses) * 4;
848 if (mud_url && mud_url[0])
849 len += 10 + os_strlen(mud_url);
850 #ifdef CONFIG_DPP2
851 if (auth->csr) {
852 size_t csr_len;
853
854 csr = base64_encode_no_lf(wpabuf_head(auth->csr),
855 wpabuf_len(auth->csr), &csr_len);
856 if (!csr)
857 return NULL;
858 len += 30 + csr_len;
859 }
860 #endif /* CONFIG_DPP2 */
861 json = wpabuf_alloc(len);
862 if (!json)
863 return NULL;
864
865 json_start_object(json, NULL);
866 if (json_add_string_escape(json, "name", dpp_name, name_len) < 0) {
867 wpabuf_free(json);
868 return NULL;
869 }
870 json_value_sep(json);
871 json_add_string(json, "wi-fi_tech", tech);
872 json_value_sep(json);
873 json_add_string(json, "netRole", dpp_netrole_str(netrole));
874 if (mud_url && mud_url[0]) {
875 json_value_sep(json);
876 json_add_string(json, "mudurl", mud_url);
877 }
878 if (opclasses) {
879 int i;
880
881 json_value_sep(json);
882 json_start_array(json, "bandSupport");
883 for (i = 0; opclasses[i]; i++)
884 wpabuf_printf(json, "%s%u", i ? "," : "", opclasses[i]);
885 json_end_array(json);
886 }
887 if (csr) {
888 json_value_sep(json);
889 json_add_string(json, "pkcs10", csr);
890 }
891 json_end_object(json);
892
893 buf = dpp_build_conf_req(auth, wpabuf_head(json));
894 wpabuf_free(json);
895 os_free(csr);
896
897 return buf;
898 }
899
900
bin_str_eq(const char * val,size_t len,const char * cmp)901 static int bin_str_eq(const char *val, size_t len, const char *cmp)
902 {
903 return os_strlen(cmp) == len && os_memcmp(val, cmp, len) == 0;
904 }
905
906
dpp_configuration_alloc(const char * type)907 struct dpp_configuration * dpp_configuration_alloc(const char *type)
908 {
909 struct dpp_configuration *conf;
910 const char *end;
911 size_t len;
912
913 conf = os_zalloc(sizeof(*conf));
914 if (!conf)
915 goto fail;
916
917 end = os_strchr(type, ' ');
918 if (end)
919 len = end - type;
920 else
921 len = os_strlen(type);
922
923 if (bin_str_eq(type, len, "psk"))
924 conf->akm = DPP_AKM_PSK;
925 else if (bin_str_eq(type, len, "sae"))
926 conf->akm = DPP_AKM_SAE;
927 else if (bin_str_eq(type, len, "psk-sae") ||
928 bin_str_eq(type, len, "psk+sae"))
929 conf->akm = DPP_AKM_PSK_SAE;
930 else if (bin_str_eq(type, len, "sae-dpp") ||
931 bin_str_eq(type, len, "dpp+sae"))
932 conf->akm = DPP_AKM_SAE_DPP;
933 else if (bin_str_eq(type, len, "psk-sae-dpp") ||
934 bin_str_eq(type, len, "dpp+psk+sae"))
935 conf->akm = DPP_AKM_PSK_SAE_DPP;
936 else if (bin_str_eq(type, len, "dpp"))
937 conf->akm = DPP_AKM_DPP;
938 else if (bin_str_eq(type, len, "dot1x"))
939 conf->akm = DPP_AKM_DOT1X;
940 else
941 goto fail;
942
943 return conf;
944 fail:
945 dpp_configuration_free(conf);
946 return NULL;
947 }
948
949
dpp_akm_psk(enum dpp_akm akm)950 int dpp_akm_psk(enum dpp_akm akm)
951 {
952 return akm == DPP_AKM_PSK || akm == DPP_AKM_PSK_SAE ||
953 akm == DPP_AKM_PSK_SAE_DPP;
954 }
955
956
dpp_akm_sae(enum dpp_akm akm)957 int dpp_akm_sae(enum dpp_akm akm)
958 {
959 return akm == DPP_AKM_SAE || akm == DPP_AKM_PSK_SAE ||
960 akm == DPP_AKM_SAE_DPP || akm == DPP_AKM_PSK_SAE_DPP;
961 }
962
963
dpp_akm_legacy(enum dpp_akm akm)964 int dpp_akm_legacy(enum dpp_akm akm)
965 {
966 return akm == DPP_AKM_PSK || akm == DPP_AKM_PSK_SAE ||
967 akm == DPP_AKM_SAE;
968 }
969
970
dpp_akm_dpp(enum dpp_akm akm)971 int dpp_akm_dpp(enum dpp_akm akm)
972 {
973 return akm == DPP_AKM_DPP || akm == DPP_AKM_SAE_DPP ||
974 akm == DPP_AKM_PSK_SAE_DPP;
975 }
976
977
dpp_akm_ver2(enum dpp_akm akm)978 int dpp_akm_ver2(enum dpp_akm akm)
979 {
980 return akm == DPP_AKM_SAE_DPP || akm == DPP_AKM_PSK_SAE_DPP;
981 }
982
983
dpp_configuration_valid(const struct dpp_configuration * conf)984 int dpp_configuration_valid(const struct dpp_configuration *conf)
985 {
986 if (conf->ssid_len == 0)
987 return 0;
988 if (dpp_akm_psk(conf->akm) && !conf->passphrase && !conf->psk_set)
989 return 0;
990 if (dpp_akm_sae(conf->akm) && !conf->passphrase)
991 return 0;
992 return 1;
993 }
994
995
dpp_configuration_free(struct dpp_configuration * conf)996 void dpp_configuration_free(struct dpp_configuration *conf)
997 {
998 if (!conf)
999 return;
1000 str_clear_free(conf->passphrase);
1001 os_free(conf->group_id);
1002 os_free(conf->csrattrs);
1003 bin_clear_free(conf, sizeof(*conf));
1004 }
1005
1006
dpp_configuration_parse_helper(struct dpp_authentication * auth,const char * cmd,int idx)1007 static int dpp_configuration_parse_helper(struct dpp_authentication *auth,
1008 const char *cmd, int idx)
1009 {
1010 const char *pos, *end;
1011 struct dpp_configuration *conf_sta = NULL, *conf_ap = NULL;
1012 struct dpp_configuration *conf = NULL;
1013 size_t len;
1014
1015 pos = os_strstr(cmd, " conf=sta-");
1016 if (pos) {
1017 conf_sta = dpp_configuration_alloc(pos + 10);
1018 if (!conf_sta)
1019 goto fail;
1020 conf_sta->netrole = DPP_NETROLE_STA;
1021 conf = conf_sta;
1022 }
1023
1024 pos = os_strstr(cmd, " conf=ap-");
1025 if (pos) {
1026 conf_ap = dpp_configuration_alloc(pos + 9);
1027 if (!conf_ap)
1028 goto fail;
1029 conf_ap->netrole = DPP_NETROLE_AP;
1030 conf = conf_ap;
1031 }
1032
1033 pos = os_strstr(cmd, " conf=configurator");
1034 if (pos)
1035 auth->provision_configurator = 1;
1036
1037 if (!conf)
1038 return 0;
1039
1040 pos = os_strstr(cmd, " ssid=");
1041 if (pos) {
1042 pos += 6;
1043 end = os_strchr(pos, ' ');
1044 conf->ssid_len = end ? (size_t) (end - pos) : os_strlen(pos);
1045 conf->ssid_len /= 2;
1046 if (conf->ssid_len > sizeof(conf->ssid) ||
1047 hexstr2bin(pos, conf->ssid, conf->ssid_len) < 0)
1048 goto fail;
1049 } else {
1050 #ifdef CONFIG_TESTING_OPTIONS
1051 /* use a default SSID for legacy testing reasons */
1052 os_memcpy(conf->ssid, "test", 4);
1053 conf->ssid_len = 4;
1054 #else /* CONFIG_TESTING_OPTIONS */
1055 goto fail;
1056 #endif /* CONFIG_TESTING_OPTIONS */
1057 }
1058
1059 pos = os_strstr(cmd, " ssid_charset=");
1060 if (pos) {
1061 if (conf_ap) {
1062 wpa_printf(MSG_INFO,
1063 "DPP: ssid64 option (ssid_charset param) not allowed for AP enrollee");
1064 goto fail;
1065 }
1066 conf->ssid_charset = atoi(pos + 14);
1067 }
1068
1069 pos = os_strstr(cmd, " pass=");
1070 if (pos) {
1071 size_t pass_len;
1072
1073 pos += 6;
1074 end = os_strchr(pos, ' ');
1075 pass_len = end ? (size_t) (end - pos) : os_strlen(pos);
1076 pass_len /= 2;
1077 if (pass_len > 63 || pass_len < 8)
1078 goto fail;
1079 conf->passphrase = os_zalloc(pass_len + 1);
1080 if (!conf->passphrase ||
1081 hexstr2bin(pos, (u8 *) conf->passphrase, pass_len) < 0)
1082 goto fail;
1083 }
1084
1085 pos = os_strstr(cmd, " psk=");
1086 if (pos) {
1087 pos += 5;
1088 if (hexstr2bin(pos, conf->psk, PMK_LEN) < 0)
1089 goto fail;
1090 conf->psk_set = 1;
1091 }
1092
1093 pos = os_strstr(cmd, " group_id=");
1094 if (pos) {
1095 size_t group_id_len;
1096
1097 pos += 10;
1098 end = os_strchr(pos, ' ');
1099 group_id_len = end ? (size_t) (end - pos) : os_strlen(pos);
1100 conf->group_id = os_malloc(group_id_len + 1);
1101 if (!conf->group_id)
1102 goto fail;
1103 os_memcpy(conf->group_id, pos, group_id_len);
1104 conf->group_id[group_id_len] = '\0';
1105 }
1106
1107 pos = os_strstr(cmd, " expiry=");
1108 if (pos) {
1109 long int val;
1110
1111 pos += 8;
1112 val = strtol(pos, NULL, 0);
1113 if (val <= 0)
1114 goto fail;
1115 conf->netaccesskey_expiry = val;
1116 }
1117
1118 pos = os_strstr(cmd, " csrattrs=");
1119 if (pos) {
1120 pos += 10;
1121 end = os_strchr(pos, ' ');
1122 len = end ? (size_t) (end - pos) : os_strlen(pos);
1123 conf->csrattrs = os_zalloc(len + 1);
1124 if (!conf->csrattrs)
1125 goto fail;
1126 os_memcpy(conf->csrattrs, pos, len);
1127 }
1128
1129 if (!dpp_configuration_valid(conf))
1130 goto fail;
1131
1132 if (idx == 0) {
1133 auth->conf_sta = conf_sta;
1134 auth->conf_ap = conf_ap;
1135 } else if (idx == 1) {
1136 auth->conf2_sta = conf_sta;
1137 auth->conf2_ap = conf_ap;
1138 } else {
1139 goto fail;
1140 }
1141 return 0;
1142
1143 fail:
1144 dpp_configuration_free(conf_sta);
1145 dpp_configuration_free(conf_ap);
1146 return -1;
1147 }
1148
1149
dpp_configuration_parse(struct dpp_authentication * auth,const char * cmd)1150 static int dpp_configuration_parse(struct dpp_authentication *auth,
1151 const char *cmd)
1152 {
1153 const char *pos;
1154 char *tmp;
1155 size_t len;
1156 int res;
1157
1158 pos = os_strstr(cmd, " @CONF-OBJ-SEP@ ");
1159 if (!pos)
1160 return dpp_configuration_parse_helper(auth, cmd, 0);
1161
1162 len = pos - cmd;
1163 tmp = os_malloc(len + 1);
1164 if (!tmp)
1165 goto fail;
1166 os_memcpy(tmp, cmd, len);
1167 tmp[len] = '\0';
1168 res = dpp_configuration_parse_helper(auth, cmd, 0);
1169 str_clear_free(tmp);
1170 if (res)
1171 goto fail;
1172 res = dpp_configuration_parse_helper(auth, cmd + len, 1);
1173 if (res)
1174 goto fail;
1175 return 0;
1176 fail:
1177 dpp_configuration_free(auth->conf_sta);
1178 dpp_configuration_free(auth->conf2_sta);
1179 dpp_configuration_free(auth->conf_ap);
1180 dpp_configuration_free(auth->conf2_ap);
1181 return -1;
1182 }
1183
1184
1185 static struct dpp_configurator *
dpp_configurator_get_id(struct dpp_global * dpp,unsigned int id)1186 dpp_configurator_get_id(struct dpp_global *dpp, unsigned int id)
1187 {
1188 struct dpp_configurator *conf;
1189
1190 if (!dpp)
1191 return NULL;
1192
1193 dl_list_for_each(conf, &dpp->configurator,
1194 struct dpp_configurator, list) {
1195 if (conf->id == id)
1196 return conf;
1197 }
1198 return NULL;
1199 }
1200
1201
dpp_set_configurator(struct dpp_authentication * auth,const char * cmd)1202 int dpp_set_configurator(struct dpp_authentication *auth, const char *cmd)
1203 {
1204 const char *pos;
1205 char *tmp = NULL;
1206 int ret = -1;
1207
1208 if (!cmd || auth->configurator_set)
1209 return 0;
1210 auth->configurator_set = 1;
1211
1212 if (cmd[0] != ' ') {
1213 size_t len;
1214
1215 len = os_strlen(cmd);
1216 tmp = os_malloc(len + 2);
1217 if (!tmp)
1218 goto fail;
1219 tmp[0] = ' ';
1220 os_memcpy(tmp + 1, cmd, len + 1);
1221 cmd = tmp;
1222 }
1223
1224 wpa_printf(MSG_DEBUG, "DPP: Set configurator parameters: %s", cmd);
1225
1226 pos = os_strstr(cmd, " configurator=");
1227 if (!auth->conf && pos) {
1228 pos += 14;
1229 auth->conf = dpp_configurator_get_id(auth->global, atoi(pos));
1230 if (!auth->conf) {
1231 wpa_printf(MSG_INFO,
1232 "DPP: Could not find the specified configurator");
1233 goto fail;
1234 }
1235 }
1236
1237 pos = os_strstr(cmd, " conn_status=");
1238 if (pos) {
1239 pos += 13;
1240 auth->send_conn_status = atoi(pos);
1241 }
1242
1243 pos = os_strstr(cmd, " akm_use_selector=");
1244 if (pos) {
1245 pos += 18;
1246 auth->akm_use_selector = atoi(pos);
1247 }
1248
1249 if (dpp_configuration_parse(auth, cmd) < 0) {
1250 wpa_msg(auth->msg_ctx, MSG_INFO,
1251 "DPP: Failed to set configurator parameters");
1252 goto fail;
1253 }
1254 ret = 0;
1255 fail:
1256 os_free(tmp);
1257 return ret;
1258 }
1259
1260
dpp_auth_deinit(struct dpp_authentication * auth)1261 void dpp_auth_deinit(struct dpp_authentication *auth)
1262 {
1263 unsigned int i;
1264
1265 if (!auth)
1266 return;
1267 dpp_configuration_free(auth->conf_ap);
1268 dpp_configuration_free(auth->conf2_ap);
1269 dpp_configuration_free(auth->conf_sta);
1270 dpp_configuration_free(auth->conf2_sta);
1271 EVP_PKEY_free(auth->own_protocol_key);
1272 EVP_PKEY_free(auth->peer_protocol_key);
1273 EVP_PKEY_free(auth->reconfig_old_protocol_key);
1274 wpabuf_free(auth->req_msg);
1275 wpabuf_free(auth->resp_msg);
1276 wpabuf_free(auth->conf_req);
1277 wpabuf_free(auth->reconfig_req_msg);
1278 wpabuf_free(auth->reconfig_resp_msg);
1279 for (i = 0; i < auth->num_conf_obj; i++) {
1280 struct dpp_config_obj *conf = &auth->conf_obj[i];
1281
1282 os_free(conf->connector);
1283 wpabuf_free(conf->c_sign_key);
1284 wpabuf_free(conf->certbag);
1285 wpabuf_free(conf->certs);
1286 wpabuf_free(conf->cacert);
1287 os_free(conf->server_name);
1288 wpabuf_free(conf->pp_key);
1289 }
1290 #ifdef CONFIG_DPP2
1291 dpp_free_asymmetric_key(auth->conf_key_pkg);
1292 os_free(auth->csrattrs);
1293 wpabuf_free(auth->csr);
1294 wpabuf_free(auth->priv_key);
1295 wpabuf_free(auth->cacert);
1296 wpabuf_free(auth->certbag);
1297 os_free(auth->trusted_eap_server_name);
1298 wpabuf_free(auth->conf_resp_tcp);
1299 #endif /* CONFIG_DPP2 */
1300 wpabuf_free(auth->net_access_key);
1301 dpp_bootstrap_info_free(auth->tmp_own_bi);
1302 if (auth->tmp_peer_bi) {
1303 dl_list_del(&auth->tmp_peer_bi->list);
1304 dpp_bootstrap_info_free(auth->tmp_peer_bi);
1305 }
1306 #ifdef CONFIG_TESTING_OPTIONS
1307 os_free(auth->config_obj_override);
1308 os_free(auth->discovery_override);
1309 os_free(auth->groups_override);
1310 #endif /* CONFIG_TESTING_OPTIONS */
1311 bin_clear_free(auth, sizeof(*auth));
1312 }
1313
1314
1315 static struct wpabuf *
dpp_build_conf_start(struct dpp_authentication * auth,struct dpp_configuration * conf,size_t tailroom)1316 dpp_build_conf_start(struct dpp_authentication *auth,
1317 struct dpp_configuration *conf, size_t tailroom)
1318 {
1319 struct wpabuf *buf;
1320
1321 #ifdef CONFIG_TESTING_OPTIONS
1322 if (auth->discovery_override)
1323 tailroom += os_strlen(auth->discovery_override);
1324 #endif /* CONFIG_TESTING_OPTIONS */
1325
1326 buf = wpabuf_alloc(200 + tailroom);
1327 if (!buf)
1328 return NULL;
1329 json_start_object(buf, NULL);
1330 json_add_string(buf, "wi-fi_tech", "infra");
1331 json_value_sep(buf);
1332 #ifdef CONFIG_TESTING_OPTIONS
1333 if (auth->discovery_override) {
1334 wpa_printf(MSG_DEBUG, "DPP: TESTING - discovery override: '%s'",
1335 auth->discovery_override);
1336 wpabuf_put_str(buf, "\"discovery\":");
1337 wpabuf_put_str(buf, auth->discovery_override);
1338 json_value_sep(buf);
1339 return buf;
1340 }
1341 #endif /* CONFIG_TESTING_OPTIONS */
1342 json_start_object(buf, "discovery");
1343 if (((!conf->ssid_charset || auth->peer_version < 2) &&
1344 json_add_string_escape(buf, "ssid", conf->ssid,
1345 conf->ssid_len) < 0) ||
1346 ((conf->ssid_charset && auth->peer_version >= 2) &&
1347 json_add_base64url(buf, "ssid64", conf->ssid,
1348 conf->ssid_len) < 0)) {
1349 wpabuf_free(buf);
1350 return NULL;
1351 }
1352 if (conf->ssid_charset > 0) {
1353 json_value_sep(buf);
1354 json_add_int(buf, "ssid_charset", conf->ssid_charset);
1355 }
1356 json_end_object(buf);
1357 json_value_sep(buf);
1358
1359 return buf;
1360 }
1361
1362
dpp_build_jwk(struct wpabuf * buf,const char * name,EVP_PKEY * key,const char * kid,const struct dpp_curve_params * curve)1363 int dpp_build_jwk(struct wpabuf *buf, const char *name, EVP_PKEY *key,
1364 const char *kid, const struct dpp_curve_params *curve)
1365 {
1366 struct wpabuf *pub;
1367 const u8 *pos;
1368 int ret = -1;
1369
1370 pub = dpp_get_pubkey_point(key, 0);
1371 if (!pub)
1372 goto fail;
1373
1374 json_start_object(buf, name);
1375 json_add_string(buf, "kty", "EC");
1376 json_value_sep(buf);
1377 json_add_string(buf, "crv", curve->jwk_crv);
1378 json_value_sep(buf);
1379 pos = wpabuf_head(pub);
1380 if (json_add_base64url(buf, "x", pos, curve->prime_len) < 0)
1381 goto fail;
1382 json_value_sep(buf);
1383 pos += curve->prime_len;
1384 if (json_add_base64url(buf, "y", pos, curve->prime_len) < 0)
1385 goto fail;
1386 if (kid) {
1387 json_value_sep(buf);
1388 json_add_string(buf, "kid", kid);
1389 }
1390 json_end_object(buf);
1391 ret = 0;
1392 fail:
1393 wpabuf_free(pub);
1394 return ret;
1395 }
1396
1397
dpp_build_legacy_cred_params(struct wpabuf * buf,struct dpp_configuration * conf)1398 static void dpp_build_legacy_cred_params(struct wpabuf *buf,
1399 struct dpp_configuration *conf)
1400 {
1401 if (conf->passphrase && os_strlen(conf->passphrase) < 64) {
1402 json_add_string_escape(buf, "pass", conf->passphrase,
1403 os_strlen(conf->passphrase));
1404 } else if (conf->psk_set) {
1405 char psk[2 * sizeof(conf->psk) + 1];
1406
1407 wpa_snprintf_hex(psk, sizeof(psk),
1408 conf->psk, sizeof(conf->psk));
1409 json_add_string(buf, "psk_hex", psk);
1410 forced_memzero(psk, sizeof(psk));
1411 }
1412 }
1413
1414
dpp_netrole_str(enum dpp_netrole netrole)1415 static const char * dpp_netrole_str(enum dpp_netrole netrole)
1416 {
1417 switch (netrole) {
1418 case DPP_NETROLE_STA:
1419 return "sta";
1420 case DPP_NETROLE_AP:
1421 return "ap";
1422 case DPP_NETROLE_CONFIGURATOR:
1423 return "configurator";
1424 default:
1425 return "??";
1426 }
1427 }
1428
1429
1430 static struct wpabuf *
dpp_build_conf_obj_dpp(struct dpp_authentication * auth,struct dpp_configuration * conf)1431 dpp_build_conf_obj_dpp(struct dpp_authentication *auth,
1432 struct dpp_configuration *conf)
1433 {
1434 struct wpabuf *buf = NULL;
1435 char *signed_conn = NULL;
1436 size_t tailroom;
1437 const struct dpp_curve_params *curve;
1438 struct wpabuf *dppcon = NULL;
1439 size_t extra_len = 1000;
1440 int incl_legacy;
1441 enum dpp_akm akm;
1442 const char *akm_str;
1443
1444 if (!auth->conf) {
1445 wpa_printf(MSG_INFO,
1446 "DPP: No configurator specified - cannot generate DPP config object");
1447 goto fail;
1448 }
1449 curve = auth->conf->curve;
1450
1451 akm = conf->akm;
1452 if (dpp_akm_ver2(akm) && auth->peer_version < 2) {
1453 wpa_printf(MSG_DEBUG,
1454 "DPP: Convert DPP+legacy credential to DPP-only for peer that does not support version 2");
1455 akm = DPP_AKM_DPP;
1456 }
1457
1458 #ifdef CONFIG_TESTING_OPTIONS
1459 if (auth->groups_override)
1460 extra_len += os_strlen(auth->groups_override);
1461 #endif /* CONFIG_TESTING_OPTIONS */
1462
1463 if (conf->group_id)
1464 extra_len += os_strlen(conf->group_id);
1465
1466 /* Connector (JSON dppCon object) */
1467 dppcon = wpabuf_alloc(extra_len + 2 * auth->curve->prime_len * 4 / 3);
1468 if (!dppcon)
1469 goto fail;
1470 #ifdef CONFIG_TESTING_OPTIONS
1471 if (auth->groups_override) {
1472 wpabuf_put_u8(dppcon, '{');
1473 if (auth->groups_override) {
1474 wpa_printf(MSG_DEBUG,
1475 "DPP: TESTING - groups override: '%s'",
1476 auth->groups_override);
1477 wpabuf_put_str(dppcon, "\"groups\":");
1478 wpabuf_put_str(dppcon, auth->groups_override);
1479 json_value_sep(dppcon);
1480 }
1481 goto skip_groups;
1482 }
1483 #endif /* CONFIG_TESTING_OPTIONS */
1484 json_start_object(dppcon, NULL);
1485 json_start_array(dppcon, "groups");
1486 json_start_object(dppcon, NULL);
1487 json_add_string(dppcon, "groupId",
1488 conf->group_id ? conf->group_id : "*");
1489 json_value_sep(dppcon);
1490 json_add_string(dppcon, "netRole", dpp_netrole_str(conf->netrole));
1491 json_end_object(dppcon);
1492 json_end_array(dppcon);
1493 json_value_sep(dppcon);
1494 #ifdef CONFIG_TESTING_OPTIONS
1495 skip_groups:
1496 #endif /* CONFIG_TESTING_OPTIONS */
1497 if (!auth->peer_protocol_key ||
1498 dpp_build_jwk(dppcon, "netAccessKey", auth->peer_protocol_key, NULL,
1499 auth->curve) < 0) {
1500 wpa_printf(MSG_DEBUG, "DPP: Failed to build netAccessKey JWK");
1501 goto fail;
1502 }
1503 if (conf->netaccesskey_expiry) {
1504 struct os_tm tm;
1505 char expiry[30];
1506
1507 if (os_gmtime(conf->netaccesskey_expiry, &tm) < 0) {
1508 wpa_printf(MSG_DEBUG,
1509 "DPP: Failed to generate expiry string");
1510 goto fail;
1511 }
1512 os_snprintf(expiry, sizeof(expiry),
1513 "%04u-%02u-%02uT%02u:%02u:%02uZ",
1514 tm.year, tm.month, tm.day,
1515 tm.hour, tm.min, tm.sec);
1516 json_value_sep(dppcon);
1517 json_add_string(dppcon, "expiry", expiry);
1518 }
1519 json_end_object(dppcon);
1520 wpa_printf(MSG_DEBUG, "DPP: dppCon: %s",
1521 (const char *) wpabuf_head(dppcon));
1522
1523 signed_conn = dpp_sign_connector(auth->conf, dppcon);
1524 if (!signed_conn)
1525 goto fail;
1526
1527 incl_legacy = dpp_akm_psk(akm) || dpp_akm_sae(akm);
1528 tailroom = 1000;
1529 tailroom += 2 * curve->prime_len * 4 / 3 + os_strlen(auth->conf->kid);
1530 tailroom += os_strlen(signed_conn);
1531 if (incl_legacy)
1532 tailroom += 1000;
1533 if (akm == DPP_AKM_DOT1X) {
1534 if (auth->certbag)
1535 tailroom += 2 * wpabuf_len(auth->certbag);
1536 if (auth->cacert)
1537 tailroom += 2 * wpabuf_len(auth->cacert);
1538 if (auth->trusted_eap_server_name)
1539 tailroom += os_strlen(auth->trusted_eap_server_name);
1540 tailroom += 1000;
1541 }
1542 buf = dpp_build_conf_start(auth, conf, tailroom);
1543 if (!buf)
1544 goto fail;
1545
1546 if (auth->akm_use_selector && dpp_akm_ver2(akm))
1547 akm_str = dpp_akm_selector_str(akm);
1548 else
1549 akm_str = dpp_akm_str(akm);
1550 json_start_object(buf, "cred");
1551 json_add_string(buf, "akm", akm_str);
1552 json_value_sep(buf);
1553 if (incl_legacy) {
1554 dpp_build_legacy_cred_params(buf, conf);
1555 json_value_sep(buf);
1556 }
1557 if (akm == DPP_AKM_DOT1X) {
1558 json_start_object(buf, "entCreds");
1559 if (!auth->certbag)
1560 goto fail;
1561 json_add_base64(buf, "certBag", wpabuf_head(auth->certbag),
1562 wpabuf_len(auth->certbag));
1563 if (auth->cacert) {
1564 json_value_sep(buf);
1565 json_add_base64(buf, "caCert",
1566 wpabuf_head(auth->cacert),
1567 wpabuf_len(auth->cacert));
1568 }
1569 if (auth->trusted_eap_server_name) {
1570 json_value_sep(buf);
1571 json_add_string(buf, "trustedEapServerName",
1572 auth->trusted_eap_server_name);
1573 }
1574 json_value_sep(buf);
1575 json_start_array(buf, "eapMethods");
1576 wpabuf_printf(buf, "%d", EAP_TYPE_TLS);
1577 json_end_array(buf);
1578 json_end_object(buf);
1579 json_value_sep(buf);
1580 }
1581 wpabuf_put_str(buf, "\"signedConnector\":\"");
1582 wpabuf_put_str(buf, signed_conn);
1583 wpabuf_put_str(buf, "\"");
1584 json_value_sep(buf);
1585 if (dpp_build_jwk(buf, "csign", auth->conf->csign, auth->conf->kid,
1586 curve) < 0) {
1587 wpa_printf(MSG_DEBUG, "DPP: Failed to build csign JWK");
1588 goto fail;
1589 }
1590 #ifdef CONFIG_DPP2
1591 if (auth->peer_version >= 2 && auth->conf->pp_key) {
1592 json_value_sep(buf);
1593 if (dpp_build_jwk(buf, "ppKey", auth->conf->pp_key, NULL,
1594 curve) < 0) {
1595 wpa_printf(MSG_DEBUG, "DPP: Failed to build ppKey JWK");
1596 goto fail;
1597 }
1598 }
1599 #endif /* CONFIG_DPP2 */
1600
1601 json_end_object(buf);
1602 json_end_object(buf);
1603
1604 wpa_hexdump_ascii_key(MSG_DEBUG, "DPP: Configuration Object",
1605 wpabuf_head(buf), wpabuf_len(buf));
1606
1607 out:
1608 os_free(signed_conn);
1609 wpabuf_free(dppcon);
1610 return buf;
1611 fail:
1612 wpa_printf(MSG_DEBUG, "DPP: Failed to build configuration object");
1613 wpabuf_free(buf);
1614 buf = NULL;
1615 goto out;
1616 }
1617
1618
1619 static struct wpabuf *
dpp_build_conf_obj_legacy(struct dpp_authentication * auth,struct dpp_configuration * conf)1620 dpp_build_conf_obj_legacy(struct dpp_authentication *auth,
1621 struct dpp_configuration *conf)
1622 {
1623 struct wpabuf *buf;
1624 const char *akm_str;
1625
1626 buf = dpp_build_conf_start(auth, conf, 1000);
1627 if (!buf)
1628 return NULL;
1629
1630 if (auth->akm_use_selector && dpp_akm_ver2(conf->akm))
1631 akm_str = dpp_akm_selector_str(conf->akm);
1632 else
1633 akm_str = dpp_akm_str(conf->akm);
1634 json_start_object(buf, "cred");
1635 json_add_string(buf, "akm", akm_str);
1636 json_value_sep(buf);
1637 dpp_build_legacy_cred_params(buf, conf);
1638 json_end_object(buf);
1639 json_end_object(buf);
1640
1641 wpa_hexdump_ascii_key(MSG_DEBUG, "DPP: Configuration Object (legacy)",
1642 wpabuf_head(buf), wpabuf_len(buf));
1643
1644 return buf;
1645 }
1646
1647
1648 static struct wpabuf *
dpp_build_conf_obj(struct dpp_authentication * auth,enum dpp_netrole netrole,int idx,bool cert_req)1649 dpp_build_conf_obj(struct dpp_authentication *auth, enum dpp_netrole netrole,
1650 int idx, bool cert_req)
1651 {
1652 struct dpp_configuration *conf = NULL;
1653
1654 #ifdef CONFIG_TESTING_OPTIONS
1655 if (auth->config_obj_override) {
1656 if (idx != 0)
1657 return NULL;
1658 wpa_printf(MSG_DEBUG, "DPP: Testing - Config Object override");
1659 return wpabuf_alloc_copy(auth->config_obj_override,
1660 os_strlen(auth->config_obj_override));
1661 }
1662 #endif /* CONFIG_TESTING_OPTIONS */
1663
1664 if (idx == 0) {
1665 if (netrole == DPP_NETROLE_STA)
1666 conf = auth->conf_sta;
1667 else if (netrole == DPP_NETROLE_AP)
1668 conf = auth->conf_ap;
1669 } else if (idx == 1) {
1670 if (netrole == DPP_NETROLE_STA)
1671 conf = auth->conf2_sta;
1672 else if (netrole == DPP_NETROLE_AP)
1673 conf = auth->conf2_ap;
1674 }
1675 if (!conf) {
1676 if (idx == 0)
1677 wpa_printf(MSG_DEBUG,
1678 "DPP: No configuration available for Enrollee(%s) - reject configuration request",
1679 dpp_netrole_str(netrole));
1680 return NULL;
1681 }
1682
1683 if (conf->akm == DPP_AKM_DOT1X) {
1684 if (!auth->conf) {
1685 wpa_printf(MSG_DEBUG,
1686 "DPP: No Configurator data available");
1687 return NULL;
1688 }
1689 if (!cert_req && !auth->certbag) {
1690 wpa_printf(MSG_DEBUG,
1691 "DPP: No certificate data available for dot1x configuration");
1692 return NULL;
1693 }
1694 return dpp_build_conf_obj_dpp(auth, conf);
1695 }
1696 if (dpp_akm_dpp(conf->akm) || (auth->peer_version >= 2 && auth->conf))
1697 return dpp_build_conf_obj_dpp(auth, conf);
1698 return dpp_build_conf_obj_legacy(auth, conf);
1699 }
1700
1701
1702 struct wpabuf *
dpp_build_conf_resp(struct dpp_authentication * auth,const u8 * e_nonce,u16 e_nonce_len,enum dpp_netrole netrole,bool cert_req)1703 dpp_build_conf_resp(struct dpp_authentication *auth, const u8 *e_nonce,
1704 u16 e_nonce_len, enum dpp_netrole netrole, bool cert_req)
1705 {
1706 struct wpabuf *conf = NULL, *conf2 = NULL, *env_data = NULL;
1707 size_t clear_len, attr_len;
1708 struct wpabuf *clear = NULL, *msg = NULL;
1709 u8 *wrapped;
1710 const u8 *addr[1];
1711 size_t len[1];
1712 enum dpp_status_error status;
1713
1714 if (auth->force_conf_resp_status != DPP_STATUS_OK) {
1715 status = auth->force_conf_resp_status;
1716 goto forced_status;
1717 }
1718
1719 if (netrole == DPP_NETROLE_CONFIGURATOR) {
1720 #ifdef CONFIG_DPP2
1721 env_data = dpp_build_enveloped_data(auth);
1722 #endif /* CONFIG_DPP2 */
1723 } else {
1724 conf = dpp_build_conf_obj(auth, netrole, 0, cert_req);
1725 if (conf) {
1726 wpa_hexdump_ascii(MSG_DEBUG,
1727 "DPP: configurationObject JSON",
1728 wpabuf_head(conf), wpabuf_len(conf));
1729 conf2 = dpp_build_conf_obj(auth, netrole, 1, cert_req);
1730 }
1731 }
1732
1733 if (conf || env_data)
1734 status = DPP_STATUS_OK;
1735 else if (!cert_req && netrole == DPP_NETROLE_STA && auth->conf_sta &&
1736 auth->conf_sta->akm == DPP_AKM_DOT1X && !auth->waiting_csr)
1737 status = DPP_STATUS_CSR_NEEDED;
1738 else
1739 status = DPP_STATUS_CONFIGURE_FAILURE;
1740 forced_status:
1741 auth->conf_resp_status = status;
1742
1743 /* { E-nonce, configurationObject[, sendConnStatus]}ke */
1744 clear_len = 4 + e_nonce_len;
1745 if (conf)
1746 clear_len += 4 + wpabuf_len(conf);
1747 if (conf2)
1748 clear_len += 4 + wpabuf_len(conf2);
1749 if (env_data)
1750 clear_len += 4 + wpabuf_len(env_data);
1751 if (auth->peer_version >= 2 && auth->send_conn_status &&
1752 netrole == DPP_NETROLE_STA)
1753 clear_len += 4;
1754 if (status == DPP_STATUS_CSR_NEEDED && auth->conf_sta &&
1755 auth->conf_sta->csrattrs)
1756 clear_len += 4 + os_strlen(auth->conf_sta->csrattrs);
1757 clear = wpabuf_alloc(clear_len);
1758 attr_len = 4 + 1 + 4 + clear_len + AES_BLOCK_SIZE;
1759 #ifdef CONFIG_TESTING_OPTIONS
1760 if (dpp_test == DPP_TEST_AFTER_WRAPPED_DATA_CONF_RESP)
1761 attr_len += 5;
1762 #endif /* CONFIG_TESTING_OPTIONS */
1763 msg = wpabuf_alloc(attr_len);
1764 if (!clear || !msg)
1765 goto fail;
1766
1767 #ifdef CONFIG_TESTING_OPTIONS
1768 if (dpp_test == DPP_TEST_NO_E_NONCE_CONF_RESP) {
1769 wpa_printf(MSG_INFO, "DPP: TESTING - no E-nonce");
1770 goto skip_e_nonce;
1771 }
1772 if (dpp_test == DPP_TEST_E_NONCE_MISMATCH_CONF_RESP) {
1773 wpa_printf(MSG_INFO, "DPP: TESTING - E-nonce mismatch");
1774 wpabuf_put_le16(clear, DPP_ATTR_ENROLLEE_NONCE);
1775 wpabuf_put_le16(clear, e_nonce_len);
1776 wpabuf_put_data(clear, e_nonce, e_nonce_len - 1);
1777 wpabuf_put_u8(clear, e_nonce[e_nonce_len - 1] ^ 0x01);
1778 goto skip_e_nonce;
1779 }
1780 if (dpp_test == DPP_TEST_NO_WRAPPED_DATA_CONF_RESP) {
1781 wpa_printf(MSG_INFO, "DPP: TESTING - no Wrapped Data");
1782 goto skip_wrapped_data;
1783 }
1784 #endif /* CONFIG_TESTING_OPTIONS */
1785
1786 /* E-nonce */
1787 wpabuf_put_le16(clear, DPP_ATTR_ENROLLEE_NONCE);
1788 wpabuf_put_le16(clear, e_nonce_len);
1789 wpabuf_put_data(clear, e_nonce, e_nonce_len);
1790
1791 #ifdef CONFIG_TESTING_OPTIONS
1792 skip_e_nonce:
1793 if (dpp_test == DPP_TEST_NO_CONFIG_OBJ_CONF_RESP) {
1794 wpa_printf(MSG_INFO, "DPP: TESTING - Config Object");
1795 goto skip_config_obj;
1796 }
1797 #endif /* CONFIG_TESTING_OPTIONS */
1798
1799 if (conf) {
1800 wpabuf_put_le16(clear, DPP_ATTR_CONFIG_OBJ);
1801 wpabuf_put_le16(clear, wpabuf_len(conf));
1802 wpabuf_put_buf(clear, conf);
1803 }
1804 if (auth->peer_version >= 2 && conf2) {
1805 wpabuf_put_le16(clear, DPP_ATTR_CONFIG_OBJ);
1806 wpabuf_put_le16(clear, wpabuf_len(conf2));
1807 wpabuf_put_buf(clear, conf2);
1808 } else if (conf2) {
1809 wpa_printf(MSG_DEBUG,
1810 "DPP: Second Config Object available, but peer does not support more than one");
1811 }
1812 if (env_data) {
1813 wpabuf_put_le16(clear, DPP_ATTR_ENVELOPED_DATA);
1814 wpabuf_put_le16(clear, wpabuf_len(env_data));
1815 wpabuf_put_buf(clear, env_data);
1816 }
1817
1818 if (auth->peer_version >= 2 && auth->send_conn_status &&
1819 netrole == DPP_NETROLE_STA && status == DPP_STATUS_OK) {
1820 wpa_printf(MSG_DEBUG, "DPP: sendConnStatus");
1821 wpabuf_put_le16(clear, DPP_ATTR_SEND_CONN_STATUS);
1822 wpabuf_put_le16(clear, 0);
1823 }
1824
1825 if (status == DPP_STATUS_CSR_NEEDED && auth->conf_sta &&
1826 auth->conf_sta->csrattrs) {
1827 auth->waiting_csr = true;
1828 wpa_printf(MSG_DEBUG, "DPP: CSR Attributes Request");
1829 wpabuf_put_le16(clear, DPP_ATTR_CSR_ATTR_REQ);
1830 wpabuf_put_le16(clear, os_strlen(auth->conf_sta->csrattrs));
1831 wpabuf_put_str(clear, auth->conf_sta->csrattrs);
1832 }
1833
1834 #ifdef CONFIG_TESTING_OPTIONS
1835 skip_config_obj:
1836 if (dpp_test == DPP_TEST_NO_STATUS_CONF_RESP) {
1837 wpa_printf(MSG_INFO, "DPP: TESTING - Status");
1838 goto skip_status;
1839 }
1840 if (dpp_test == DPP_TEST_INVALID_STATUS_CONF_RESP) {
1841 wpa_printf(MSG_INFO, "DPP: TESTING - invalid Status");
1842 status = 255;
1843 }
1844 #endif /* CONFIG_TESTING_OPTIONS */
1845
1846 /* DPP Status */
1847 dpp_build_attr_status(msg, status);
1848
1849 #ifdef CONFIG_TESTING_OPTIONS
1850 skip_status:
1851 #endif /* CONFIG_TESTING_OPTIONS */
1852
1853 addr[0] = wpabuf_head(msg);
1854 len[0] = wpabuf_len(msg);
1855 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD", addr[0], len[0]);
1856
1857 wpabuf_put_le16(msg, DPP_ATTR_WRAPPED_DATA);
1858 wpabuf_put_le16(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
1859 wrapped = wpabuf_put(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
1860
1861 wpa_hexdump_buf(MSG_DEBUG, "DPP: AES-SIV cleartext", clear);
1862 if (aes_siv_encrypt(auth->ke, auth->curve->hash_len,
1863 wpabuf_head(clear), wpabuf_len(clear),
1864 1, addr, len, wrapped) < 0)
1865 goto fail;
1866 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV ciphertext",
1867 wrapped, wpabuf_len(clear) + AES_BLOCK_SIZE);
1868
1869 #ifdef CONFIG_TESTING_OPTIONS
1870 if (dpp_test == DPP_TEST_AFTER_WRAPPED_DATA_CONF_RESP) {
1871 wpa_printf(MSG_INFO, "DPP: TESTING - attr after Wrapped Data");
1872 dpp_build_attr_status(msg, DPP_STATUS_OK);
1873 }
1874 skip_wrapped_data:
1875 #endif /* CONFIG_TESTING_OPTIONS */
1876
1877 wpa_hexdump_buf(MSG_DEBUG,
1878 "DPP: Configuration Response attributes", msg);
1879 out:
1880 wpabuf_clear_free(conf);
1881 wpabuf_clear_free(conf2);
1882 wpabuf_clear_free(env_data);
1883 wpabuf_clear_free(clear);
1884
1885 return msg;
1886 fail:
1887 wpabuf_free(msg);
1888 msg = NULL;
1889 goto out;
1890 }
1891
1892
1893 struct wpabuf *
dpp_conf_req_rx(struct dpp_authentication * auth,const u8 * attr_start,size_t attr_len)1894 dpp_conf_req_rx(struct dpp_authentication *auth, const u8 *attr_start,
1895 size_t attr_len)
1896 {
1897 const u8 *wrapped_data, *e_nonce, *config_attr;
1898 u16 wrapped_data_len, e_nonce_len, config_attr_len;
1899 u8 *unwrapped = NULL;
1900 size_t unwrapped_len = 0;
1901 struct wpabuf *resp = NULL;
1902 struct json_token *root = NULL, *token;
1903 enum dpp_netrole netrole;
1904 struct wpabuf *cert_req = NULL;
1905
1906 #ifdef CONFIG_TESTING_OPTIONS
1907 if (dpp_test == DPP_TEST_STOP_AT_CONF_REQ) {
1908 wpa_printf(MSG_INFO,
1909 "DPP: TESTING - stop at Config Request");
1910 return NULL;
1911 }
1912 #endif /* CONFIG_TESTING_OPTIONS */
1913
1914 if (dpp_check_attrs(attr_start, attr_len) < 0) {
1915 dpp_auth_fail(auth, "Invalid attribute in config request");
1916 return NULL;
1917 }
1918
1919 wrapped_data = dpp_get_attr(attr_start, attr_len, DPP_ATTR_WRAPPED_DATA,
1920 &wrapped_data_len);
1921 if (!wrapped_data || wrapped_data_len < AES_BLOCK_SIZE) {
1922 dpp_auth_fail(auth,
1923 "Missing or invalid required Wrapped Data attribute");
1924 return NULL;
1925 }
1926
1927 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV ciphertext",
1928 wrapped_data, wrapped_data_len);
1929 unwrapped_len = wrapped_data_len - AES_BLOCK_SIZE;
1930 unwrapped = os_malloc(unwrapped_len);
1931 if (!unwrapped)
1932 return NULL;
1933 if (aes_siv_decrypt(auth->ke, auth->curve->hash_len,
1934 wrapped_data, wrapped_data_len,
1935 0, NULL, NULL, unwrapped) < 0) {
1936 dpp_auth_fail(auth, "AES-SIV decryption failed");
1937 goto fail;
1938 }
1939 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV cleartext",
1940 unwrapped, unwrapped_len);
1941
1942 if (dpp_check_attrs(unwrapped, unwrapped_len) < 0) {
1943 dpp_auth_fail(auth, "Invalid attribute in unwrapped data");
1944 goto fail;
1945 }
1946
1947 e_nonce = dpp_get_attr(unwrapped, unwrapped_len,
1948 DPP_ATTR_ENROLLEE_NONCE,
1949 &e_nonce_len);
1950 if (!e_nonce || e_nonce_len != auth->curve->nonce_len) {
1951 dpp_auth_fail(auth,
1952 "Missing or invalid Enrollee Nonce attribute");
1953 goto fail;
1954 }
1955 wpa_hexdump(MSG_DEBUG, "DPP: Enrollee Nonce", e_nonce, e_nonce_len);
1956 os_memcpy(auth->e_nonce, e_nonce, e_nonce_len);
1957
1958 config_attr = dpp_get_attr(unwrapped, unwrapped_len,
1959 DPP_ATTR_CONFIG_ATTR_OBJ,
1960 &config_attr_len);
1961 if (!config_attr) {
1962 dpp_auth_fail(auth,
1963 "Missing or invalid Config Attributes attribute");
1964 goto fail;
1965 }
1966 wpa_hexdump_ascii(MSG_DEBUG, "DPP: Config Attributes",
1967 config_attr, config_attr_len);
1968
1969 root = json_parse((const char *) config_attr, config_attr_len);
1970 if (!root) {
1971 dpp_auth_fail(auth, "Could not parse Config Attributes");
1972 goto fail;
1973 }
1974
1975 token = json_get_member(root, "name");
1976 if (!token || token->type != JSON_STRING) {
1977 dpp_auth_fail(auth, "No Config Attributes - name");
1978 goto fail;
1979 }
1980 wpa_printf(MSG_DEBUG, "DPP: Enrollee name = '%s'", token->string);
1981
1982 token = json_get_member(root, "wi-fi_tech");
1983 if (!token || token->type != JSON_STRING) {
1984 dpp_auth_fail(auth, "No Config Attributes - wi-fi_tech");
1985 goto fail;
1986 }
1987 wpa_printf(MSG_DEBUG, "DPP: wi-fi_tech = '%s'", token->string);
1988 if (os_strcmp(token->string, "infra") != 0) {
1989 wpa_printf(MSG_DEBUG, "DPP: Unsupported wi-fi_tech '%s'",
1990 token->string);
1991 dpp_auth_fail(auth, "Unsupported wi-fi_tech");
1992 goto fail;
1993 }
1994
1995 token = json_get_member(root, "netRole");
1996 if (!token || token->type != JSON_STRING) {
1997 dpp_auth_fail(auth, "No Config Attributes - netRole");
1998 goto fail;
1999 }
2000 wpa_printf(MSG_DEBUG, "DPP: netRole = '%s'", token->string);
2001 if (os_strcmp(token->string, "sta") == 0) {
2002 netrole = DPP_NETROLE_STA;
2003 } else if (os_strcmp(token->string, "ap") == 0) {
2004 netrole = DPP_NETROLE_AP;
2005 } else if (os_strcmp(token->string, "configurator") == 0) {
2006 netrole = DPP_NETROLE_CONFIGURATOR;
2007 } else {
2008 wpa_printf(MSG_DEBUG, "DPP: Unsupported netRole '%s'",
2009 token->string);
2010 dpp_auth_fail(auth, "Unsupported netRole");
2011 goto fail;
2012 }
2013 auth->e_netrole = netrole;
2014
2015 token = json_get_member(root, "mudurl");
2016 if (token && token->type == JSON_STRING) {
2017 wpa_printf(MSG_DEBUG, "DPP: mudurl = '%s'", token->string);
2018 wpa_msg(auth->msg_ctx, MSG_INFO, DPP_EVENT_MUD_URL "%s",
2019 token->string);
2020 }
2021
2022 token = json_get_member(root, "bandSupport");
2023 auth->band_list_size = 0;
2024 if (token && token->type == JSON_ARRAY) {
2025 int *opclass = NULL;
2026 char txt[200], *pos, *end;
2027 int i, res;
2028
2029 memset(auth->band_list, 0, sizeof(auth->band_list));
2030 wpa_printf(MSG_DEBUG, "DPP: bandSupport");
2031 token = token->child;
2032 while (token) {
2033 if (token->type != JSON_NUMBER) {
2034 wpa_printf(MSG_DEBUG,
2035 "DPP: Invalid bandSupport array member type");
2036 } else {
2037 if (auth->band_list_size < DPP_MAX_CHANNELS) {
2038 auth->band_list[auth->band_list_size++] = token->number;
2039 }
2040 wpa_printf(MSG_DEBUG,
2041 "DPP: Supported global operating class: %d",
2042 token->number);
2043 int_array_add_unique(&opclass, token->number);
2044 }
2045 token = token->sibling;
2046 }
2047
2048 txt[0] = '\0';
2049 pos = txt;
2050 end = txt + sizeof(txt);
2051 for (i = 0; opclass && opclass[i]; i++) {
2052 res = os_snprintf(pos, end - pos, "%s%d",
2053 pos == txt ? "" : ",", opclass[i]);
2054 if (os_snprintf_error(end - pos, res)) {
2055 *pos = '\0';
2056 break;
2057 }
2058 pos += res;
2059 }
2060 os_free(opclass);
2061 wpa_msg(auth->msg_ctx, MSG_INFO, DPP_EVENT_BAND_SUPPORT "%s",
2062 txt);
2063 }
2064
2065 #ifdef CONFIG_DPP2
2066 cert_req = json_get_member_base64(root, "pkcs10");
2067 if (cert_req) {
2068 char *txt;
2069 int id;
2070
2071 wpa_hexdump_buf(MSG_DEBUG, "DPP: CertificateRequest", cert_req);
2072 if (dpp_validate_csr(auth, cert_req) < 0) {
2073 wpa_printf(MSG_DEBUG, "DPP: CSR is not valid");
2074 auth->force_conf_resp_status = DPP_STATUS_CSR_BAD;
2075 goto cont;
2076 }
2077
2078 if (auth->peer_bi) {
2079 id = auth->peer_bi->id;
2080 } else if (auth->tmp_peer_bi) {
2081 id = auth->tmp_peer_bi->id;
2082 } else {
2083 struct dpp_bootstrap_info *bi;
2084
2085 bi = os_zalloc(sizeof(*bi));
2086 if (!bi)
2087 goto fail;
2088 bi->id = dpp_next_id(auth->global);
2089 dl_list_add(&auth->global->bootstrap, &bi->list);
2090 auth->tmp_peer_bi = bi;
2091 id = bi->id;
2092 }
2093
2094 wpa_printf(MSG_DEBUG, "DPP: CSR is valid - forward to CA/RA");
2095 txt = base64_encode_no_lf(wpabuf_head(cert_req),
2096 wpabuf_len(cert_req), NULL);
2097 if (!txt)
2098 goto fail;
2099
2100 wpa_msg(auth->msg_ctx, MSG_INFO, DPP_EVENT_CSR "peer=%d csr=%s",
2101 id, txt);
2102 os_free(txt);
2103 auth->waiting_csr = false;
2104 auth->waiting_cert = true;
2105 goto fail;
2106 }
2107 cont:
2108 #endif /* CONFIG_DPP2 */
2109
2110 resp = dpp_build_conf_resp(auth, e_nonce, e_nonce_len, netrole,
2111 cert_req);
2112
2113 fail:
2114 wpabuf_free(cert_req);
2115 json_free(root);
2116 os_free(unwrapped);
2117 return resp;
2118 }
2119
2120
dpp_parse_cred_legacy(struct dpp_config_obj * conf,struct json_token * cred)2121 static int dpp_parse_cred_legacy(struct dpp_config_obj *conf,
2122 struct json_token *cred)
2123 {
2124 struct json_token *pass, *psk_hex;
2125
2126 wpa_printf(MSG_DEBUG, "DPP: Legacy akm=psk credential");
2127
2128 pass = json_get_member(cred, "pass");
2129 psk_hex = json_get_member(cred, "psk_hex");
2130
2131 if (pass && pass->type == JSON_STRING) {
2132 size_t len = os_strlen(pass->string);
2133
2134 wpa_hexdump_ascii_key(MSG_DEBUG, "DPP: Legacy passphrase",
2135 pass->string, len);
2136 if (len < 8 || len > 63)
2137 return -1;
2138 os_strlcpy(conf->passphrase, pass->string,
2139 sizeof(conf->passphrase));
2140 } else if (psk_hex && psk_hex->type == JSON_STRING) {
2141 if (dpp_akm_sae(conf->akm) && !dpp_akm_psk(conf->akm)) {
2142 wpa_printf(MSG_DEBUG,
2143 "DPP: Unexpected psk_hex with akm=sae");
2144 return -1;
2145 }
2146 if (os_strlen(psk_hex->string) != PMK_LEN * 2 ||
2147 hexstr2bin(psk_hex->string, conf->psk, PMK_LEN) < 0) {
2148 wpa_printf(MSG_DEBUG, "DPP: Invalid psk_hex encoding");
2149 return -1;
2150 }
2151 wpa_hexdump_key(MSG_DEBUG, "DPP: Legacy PSK",
2152 conf->psk, PMK_LEN);
2153 conf->psk_set = 1;
2154 } else {
2155 wpa_printf(MSG_DEBUG, "DPP: No pass or psk_hex strings found");
2156 return -1;
2157 }
2158
2159 if (dpp_akm_sae(conf->akm) && !conf->passphrase[0]) {
2160 wpa_printf(MSG_DEBUG, "DPP: No pass for sae found");
2161 return -1;
2162 }
2163
2164 return 0;
2165 }
2166
2167
dpp_parse_jwk(struct json_token * jwk,const struct dpp_curve_params ** key_curve)2168 EVP_PKEY * dpp_parse_jwk(struct json_token *jwk,
2169 const struct dpp_curve_params **key_curve)
2170 {
2171 struct json_token *token;
2172 const struct dpp_curve_params *curve;
2173 struct wpabuf *x = NULL, *y = NULL;
2174 EC_GROUP *group;
2175 EVP_PKEY *pkey = NULL;
2176
2177 token = json_get_member(jwk, "kty");
2178 if (!token || token->type != JSON_STRING) {
2179 wpa_printf(MSG_DEBUG, "DPP: No kty in JWK");
2180 goto fail;
2181 }
2182 if (os_strcmp(token->string, "EC") != 0) {
2183 wpa_printf(MSG_DEBUG, "DPP: Unexpected JWK kty '%s'",
2184 token->string);
2185 goto fail;
2186 }
2187
2188 token = json_get_member(jwk, "crv");
2189 if (!token || token->type != JSON_STRING) {
2190 wpa_printf(MSG_DEBUG, "DPP: No crv in JWK");
2191 goto fail;
2192 }
2193 curve = dpp_get_curve_jwk_crv(token->string);
2194 if (!curve) {
2195 wpa_printf(MSG_DEBUG, "DPP: Unsupported JWK crv '%s'",
2196 token->string);
2197 goto fail;
2198 }
2199
2200 x = json_get_member_base64url(jwk, "x");
2201 if (!x) {
2202 wpa_printf(MSG_DEBUG, "DPP: No x in JWK");
2203 goto fail;
2204 }
2205 wpa_hexdump_buf(MSG_DEBUG, "DPP: JWK x", x);
2206 if (wpabuf_len(x) != curve->prime_len) {
2207 wpa_printf(MSG_DEBUG,
2208 "DPP: Unexpected JWK x length %u (expected %u for curve %s)",
2209 (unsigned int) wpabuf_len(x),
2210 (unsigned int) curve->prime_len, curve->name);
2211 goto fail;
2212 }
2213
2214 y = json_get_member_base64url(jwk, "y");
2215 if (!y) {
2216 wpa_printf(MSG_DEBUG, "DPP: No y in JWK");
2217 goto fail;
2218 }
2219 wpa_hexdump_buf(MSG_DEBUG, "DPP: JWK y", y);
2220 if (wpabuf_len(y) != curve->prime_len) {
2221 wpa_printf(MSG_DEBUG,
2222 "DPP: Unexpected JWK y length %u (expected %u for curve %s)",
2223 (unsigned int) wpabuf_len(y),
2224 (unsigned int) curve->prime_len, curve->name);
2225 goto fail;
2226 }
2227
2228 group = EC_GROUP_new_by_curve_name(OBJ_txt2nid(curve->name));
2229 if (!group) {
2230 wpa_printf(MSG_DEBUG, "DPP: Could not prepare group for JWK");
2231 goto fail;
2232 }
2233
2234 pkey = dpp_set_pubkey_point_group(group, wpabuf_head(x), wpabuf_head(y),
2235 wpabuf_len(x));
2236 EC_GROUP_free(group);
2237 *key_curve = curve;
2238
2239 fail:
2240 wpabuf_free(x);
2241 wpabuf_free(y);
2242
2243 return pkey;
2244 }
2245
2246
dpp_key_expired(const char * timestamp,os_time_t * expiry)2247 int dpp_key_expired(const char *timestamp, os_time_t *expiry)
2248 {
2249 struct os_time now;
2250 unsigned int year, month, day, hour, min, sec;
2251 os_time_t utime;
2252 const char *pos;
2253
2254 /* ISO 8601 date and time:
2255 * <date>T<time>
2256 * YYYY-MM-DDTHH:MM:SSZ
2257 * YYYY-MM-DDTHH:MM:SS+03:00
2258 */
2259 if (os_strlen(timestamp) < 19) {
2260 wpa_printf(MSG_DEBUG,
2261 "DPP: Too short timestamp - assume expired key");
2262 return 1;
2263 }
2264 if (sscanf(timestamp, "%04u-%02u-%02uT%02u:%02u:%02u",
2265 &year, &month, &day, &hour, &min, &sec) != 6) {
2266 wpa_printf(MSG_DEBUG,
2267 "DPP: Failed to parse expiration day - assume expired key");
2268 return 1;
2269 }
2270
2271 if (os_mktime(year, month, day, hour, min, sec, &utime) < 0) {
2272 wpa_printf(MSG_DEBUG,
2273 "DPP: Invalid date/time information - assume expired key");
2274 return 1;
2275 }
2276
2277 pos = timestamp + 19;
2278 if (*pos == 'Z' || *pos == '\0') {
2279 /* In UTC - no need to adjust */
2280 } else if (*pos == '-' || *pos == '+') {
2281 int items;
2282
2283 /* Adjust local time to UTC */
2284 items = sscanf(pos + 1, "%02u:%02u", &hour, &min);
2285 if (items < 1) {
2286 wpa_printf(MSG_DEBUG,
2287 "DPP: Invalid time zone designator (%s) - assume expired key",
2288 pos);
2289 return 1;
2290 }
2291 if (*pos == '-')
2292 utime += 3600 * hour;
2293 if (*pos == '+')
2294 utime -= 3600 * hour;
2295 if (items > 1) {
2296 if (*pos == '-')
2297 utime += 60 * min;
2298 if (*pos == '+')
2299 utime -= 60 * min;
2300 }
2301 } else {
2302 wpa_printf(MSG_DEBUG,
2303 "DPP: Invalid time zone designator (%s) - assume expired key",
2304 pos);
2305 return 1;
2306 }
2307 if (expiry)
2308 *expiry = utime;
2309
2310 if (os_get_time(&now) < 0) {
2311 wpa_printf(MSG_DEBUG,
2312 "DPP: Cannot get current time - assume expired key");
2313 return 1;
2314 }
2315
2316 if (now.sec > utime) {
2317 wpa_printf(MSG_DEBUG, "DPP: Key has expired (%lu < %lu)",
2318 utime, now.sec);
2319 return 1;
2320 }
2321
2322 return 0;
2323 }
2324
2325
dpp_parse_connector(struct dpp_authentication * auth,struct dpp_config_obj * conf,const unsigned char * payload,u16 payload_len)2326 static int dpp_parse_connector(struct dpp_authentication *auth,
2327 struct dpp_config_obj *conf,
2328 const unsigned char *payload,
2329 u16 payload_len)
2330 {
2331 struct json_token *root, *groups, *netkey, *token;
2332 int ret = -1;
2333 EVP_PKEY *key = NULL;
2334 const struct dpp_curve_params *curve;
2335 unsigned int rules = 0;
2336
2337 root = json_parse((const char *) payload, payload_len);
2338 if (!root) {
2339 wpa_printf(MSG_DEBUG, "DPP: JSON parsing of connector failed");
2340 goto fail;
2341 }
2342
2343 groups = json_get_member(root, "groups");
2344 if (!groups || groups->type != JSON_ARRAY) {
2345 wpa_printf(MSG_DEBUG, "DPP: No groups array found");
2346 goto skip_groups;
2347 }
2348 for (token = groups->child; token; token = token->sibling) {
2349 struct json_token *id, *role;
2350
2351 id = json_get_member(token, "groupId");
2352 if (!id || id->type != JSON_STRING) {
2353 wpa_printf(MSG_DEBUG, "DPP: Missing groupId string");
2354 goto fail;
2355 }
2356
2357 role = json_get_member(token, "netRole");
2358 if (!role || role->type != JSON_STRING) {
2359 wpa_printf(MSG_DEBUG, "DPP: Missing netRole string");
2360 goto fail;
2361 }
2362 wpa_printf(MSG_DEBUG,
2363 "DPP: connector group: groupId='%s' netRole='%s'",
2364 id->string, role->string);
2365 rules++;
2366 }
2367 skip_groups:
2368
2369 if (!rules) {
2370 wpa_printf(MSG_DEBUG,
2371 "DPP: Connector includes no groups");
2372 goto fail;
2373 }
2374
2375 token = json_get_member(root, "expiry");
2376 if (!token || token->type != JSON_STRING) {
2377 wpa_printf(MSG_DEBUG,
2378 "DPP: No expiry string found - connector does not expire");
2379 } else {
2380 wpa_printf(MSG_DEBUG, "DPP: expiry = %s", token->string);
2381 if (dpp_key_expired(token->string,
2382 &auth->net_access_key_expiry)) {
2383 wpa_printf(MSG_DEBUG,
2384 "DPP: Connector (netAccessKey) has expired");
2385 goto fail;
2386 }
2387 }
2388
2389 netkey = json_get_member(root, "netAccessKey");
2390 if (!netkey || netkey->type != JSON_OBJECT) {
2391 wpa_printf(MSG_DEBUG, "DPP: No netAccessKey object found");
2392 goto fail;
2393 }
2394
2395 key = dpp_parse_jwk(netkey, &curve);
2396 if (!key)
2397 goto fail;
2398 dpp_debug_print_key("DPP: Received netAccessKey", key);
2399
2400 if (EVP_PKEY_cmp(key, auth->own_protocol_key) != 1) {
2401 wpa_printf(MSG_DEBUG,
2402 "DPP: netAccessKey in connector does not match own protocol key");
2403 #ifdef CONFIG_TESTING_OPTIONS
2404 if (auth->ignore_netaccesskey_mismatch) {
2405 wpa_printf(MSG_DEBUG,
2406 "DPP: TESTING - skip netAccessKey mismatch");
2407 } else {
2408 goto fail;
2409 }
2410 #else /* CONFIG_TESTING_OPTIONS */
2411 goto fail;
2412 #endif /* CONFIG_TESTING_OPTIONS */
2413 }
2414
2415 ret = 0;
2416 fail:
2417 EVP_PKEY_free(key);
2418 json_free(root);
2419 return ret;
2420 }
2421
2422
dpp_copy_csign(struct dpp_config_obj * conf,EVP_PKEY * csign)2423 static void dpp_copy_csign(struct dpp_config_obj *conf, EVP_PKEY *csign)
2424 {
2425 unsigned char *der = NULL;
2426 int der_len;
2427
2428 der_len = i2d_PUBKEY(csign, &der);
2429 if (der_len <= 0)
2430 return;
2431 wpabuf_free(conf->c_sign_key);
2432 conf->c_sign_key = wpabuf_alloc_copy(der, der_len);
2433 OPENSSL_free(der);
2434 }
2435
2436
dpp_copy_ppkey(struct dpp_config_obj * conf,EVP_PKEY * ppkey)2437 static void dpp_copy_ppkey(struct dpp_config_obj *conf, EVP_PKEY *ppkey)
2438 {
2439 unsigned char *der = NULL;
2440 int der_len;
2441
2442 der_len = i2d_PUBKEY(ppkey, &der);
2443 if (der_len <= 0)
2444 return;
2445 wpabuf_free(conf->pp_key);
2446 conf->pp_key = wpabuf_alloc_copy(der, der_len);
2447 OPENSSL_free(der);
2448 }
2449
2450
dpp_copy_netaccesskey(struct dpp_authentication * auth,struct dpp_config_obj * conf)2451 static void dpp_copy_netaccesskey(struct dpp_authentication *auth,
2452 struct dpp_config_obj *conf)
2453 {
2454 unsigned char *der = NULL;
2455 int der_len;
2456 EC_KEY *eckey;
2457 EVP_PKEY *own_key;
2458
2459 own_key = auth->own_protocol_key;
2460 #ifdef CONFIG_DPP2
2461 if (auth->reconfig_connector_key == DPP_CONFIG_REUSEKEY &&
2462 auth->reconfig_old_protocol_key)
2463 own_key = auth->reconfig_old_protocol_key;
2464 #endif /* CONFIG_DPP2 */
2465 eckey = EVP_PKEY_get1_EC_KEY(own_key);
2466 if (!eckey)
2467 return;
2468
2469 der_len = i2d_ECPrivateKey(eckey, &der);
2470 if (der_len <= 0) {
2471 EC_KEY_free(eckey);
2472 return;
2473 }
2474 wpabuf_free(auth->net_access_key);
2475 auth->net_access_key = wpabuf_alloc_copy(der, der_len);
2476 OPENSSL_free(der);
2477 EC_KEY_free(eckey);
2478 }
2479
2480
dpp_parse_cred_dpp(struct dpp_authentication * auth,struct dpp_config_obj * conf,struct json_token * cred)2481 static int dpp_parse_cred_dpp(struct dpp_authentication *auth,
2482 struct dpp_config_obj *conf,
2483 struct json_token *cred)
2484 {
2485 struct dpp_signed_connector_info info;
2486 struct json_token *token, *csign, *ppkey;
2487 int ret = -1;
2488 EVP_PKEY *csign_pub = NULL, *pp_pub = NULL;
2489 const struct dpp_curve_params *key_curve = NULL, *pp_curve = NULL;
2490 const char *signed_connector;
2491
2492 os_memset(&info, 0, sizeof(info));
2493
2494 if (dpp_akm_psk(conf->akm) || dpp_akm_sae(conf->akm)) {
2495 wpa_printf(MSG_DEBUG,
2496 "DPP: Legacy credential included in Connector credential");
2497 if (dpp_parse_cred_legacy(conf, cred) < 0)
2498 return -1;
2499 }
2500
2501 wpa_printf(MSG_DEBUG, "DPP: Connector credential");
2502
2503 csign = json_get_member(cred, "csign");
2504 if (!csign || csign->type != JSON_OBJECT) {
2505 wpa_printf(MSG_DEBUG, "DPP: No csign JWK in JSON");
2506 goto fail;
2507 }
2508
2509 csign_pub = dpp_parse_jwk(csign, &key_curve);
2510 if (!csign_pub) {
2511 wpa_printf(MSG_DEBUG, "DPP: Failed to parse csign JWK");
2512 goto fail;
2513 }
2514 dpp_debug_print_key("DPP: Received C-sign-key", csign_pub);
2515
2516 ppkey = json_get_member(cred, "ppKey");
2517 if (ppkey && ppkey->type == JSON_OBJECT) {
2518 pp_pub = dpp_parse_jwk(ppkey, &pp_curve);
2519 if (!pp_pub) {
2520 wpa_printf(MSG_DEBUG, "DPP: Failed to parse ppKey JWK");
2521 goto fail;
2522 }
2523 dpp_debug_print_key("DPP: Received ppKey", pp_pub);
2524 if (key_curve != pp_curve) {
2525 wpa_printf(MSG_DEBUG,
2526 "DPP: C-sign-key and ppKey do not use the same curve");
2527 goto fail;
2528 }
2529 }
2530
2531 token = json_get_member(cred, "signedConnector");
2532 if (!token || token->type != JSON_STRING) {
2533 wpa_printf(MSG_DEBUG, "DPP: No signedConnector string found");
2534 goto fail;
2535 }
2536 wpa_hexdump_ascii(MSG_DEBUG, "DPP: signedConnector",
2537 token->string, os_strlen(token->string));
2538 signed_connector = token->string;
2539
2540 if (os_strchr(signed_connector, '"') ||
2541 os_strchr(signed_connector, '\n')) {
2542 wpa_printf(MSG_DEBUG,
2543 "DPP: Unexpected character in signedConnector");
2544 goto fail;
2545 }
2546
2547 if (dpp_process_signed_connector(&info, csign_pub,
2548 signed_connector) != DPP_STATUS_OK)
2549 goto fail;
2550
2551 if (dpp_parse_connector(auth, conf,
2552 info.payload, info.payload_len) < 0) {
2553 wpa_printf(MSG_DEBUG, "DPP: Failed to parse connector");
2554 goto fail;
2555 }
2556
2557 os_free(conf->connector);
2558 conf->connector = os_strdup(signed_connector);
2559
2560 dpp_copy_csign(conf, csign_pub);
2561 if (pp_pub)
2562 dpp_copy_ppkey(conf, pp_pub);
2563 if (dpp_akm_dpp(conf->akm) || auth->peer_version >= 2)
2564 dpp_copy_netaccesskey(auth, conf);
2565
2566 ret = 0;
2567 fail:
2568 EVP_PKEY_free(csign_pub);
2569 EVP_PKEY_free(pp_pub);
2570 os_free(info.payload);
2571 return ret;
2572 }
2573
2574
2575 #ifdef CONFIG_DPP2
dpp_parse_cred_dot1x(struct dpp_authentication * auth,struct dpp_config_obj * conf,struct json_token * cred)2576 static int dpp_parse_cred_dot1x(struct dpp_authentication *auth,
2577 struct dpp_config_obj *conf,
2578 struct json_token *cred)
2579 {
2580 struct json_token *ent, *name;
2581
2582 ent = json_get_member(cred, "entCreds");
2583 if (!ent || ent->type != JSON_OBJECT) {
2584 dpp_auth_fail(auth, "No entCreds in JSON");
2585 return -1;
2586 }
2587
2588 conf->certbag = json_get_member_base64(ent, "certBag");
2589 if (!conf->certbag) {
2590 dpp_auth_fail(auth, "No certBag in JSON");
2591 return -1;
2592 }
2593 wpa_hexdump_buf(MSG_MSGDUMP, "DPP: Received certBag", conf->certbag);
2594 conf->certs = dpp_pkcs7_certs(conf->certbag);
2595 if (!conf->certs) {
2596 dpp_auth_fail(auth, "No certificates in certBag");
2597 return -1;
2598 }
2599
2600 conf->cacert = json_get_member_base64(ent, "caCert");
2601 if (conf->cacert)
2602 wpa_hexdump_buf(MSG_MSGDUMP, "DPP: Received caCert",
2603 conf->cacert);
2604
2605 name = json_get_member(ent, "trustedEapServerName");
2606 if (name &&
2607 (name->type != JSON_STRING ||
2608 has_ctrl_char((const u8 *) name->string,
2609 os_strlen(name->string)))) {
2610 dpp_auth_fail(auth,
2611 "Invalid trustedEapServerName type in JSON");
2612 return -1;
2613 }
2614 if (name && name->string) {
2615 wpa_printf(MSG_DEBUG, "DPP: Received trustedEapServerName: %s",
2616 name->string);
2617 conf->server_name = os_strdup(name->string);
2618 if (!conf->server_name)
2619 return -1;
2620 }
2621
2622 return 0;
2623 }
2624 #endif /* CONFIG_DPP2 */
2625
2626
dpp_akm_str(enum dpp_akm akm)2627 const char * dpp_akm_str(enum dpp_akm akm)
2628 {
2629 switch (akm) {
2630 case DPP_AKM_DPP:
2631 return "dpp";
2632 case DPP_AKM_PSK:
2633 return "psk";
2634 case DPP_AKM_SAE:
2635 return "sae";
2636 case DPP_AKM_PSK_SAE:
2637 return "psk+sae";
2638 case DPP_AKM_SAE_DPP:
2639 return "dpp+sae";
2640 case DPP_AKM_PSK_SAE_DPP:
2641 return "dpp+psk+sae";
2642 case DPP_AKM_DOT1X:
2643 return "dot1x";
2644 default:
2645 return "??";
2646 }
2647 }
2648
2649
dpp_akm_selector_str(enum dpp_akm akm)2650 const char * dpp_akm_selector_str(enum dpp_akm akm)
2651 {
2652 switch (akm) {
2653 case DPP_AKM_DPP:
2654 return "506F9A02";
2655 case DPP_AKM_PSK:
2656 return "000FAC02+000FAC06";
2657 case DPP_AKM_SAE:
2658 return "000FAC08";
2659 case DPP_AKM_PSK_SAE:
2660 return "000FAC02+000FAC06+000FAC08";
2661 case DPP_AKM_SAE_DPP:
2662 return "506F9A02+000FAC08";
2663 case DPP_AKM_PSK_SAE_DPP:
2664 return "506F9A02+000FAC08+000FAC02+000FAC06";
2665 case DPP_AKM_DOT1X:
2666 return "000FAC01+000FAC05";
2667 default:
2668 return "??";
2669 }
2670 }
2671
2672
dpp_akm_from_str(const char * akm)2673 static enum dpp_akm dpp_akm_from_str(const char *akm)
2674 {
2675 const char *pos;
2676 int dpp = 0, psk = 0, sae = 0, dot1x = 0;
2677
2678 if (os_strcmp(akm, "psk") == 0)
2679 return DPP_AKM_PSK;
2680 if (os_strcmp(akm, "sae") == 0)
2681 return DPP_AKM_SAE;
2682 if (os_strcmp(akm, "psk+sae") == 0)
2683 return DPP_AKM_PSK_SAE;
2684 if (os_strcmp(akm, "dpp") == 0)
2685 return DPP_AKM_DPP;
2686 if (os_strcmp(akm, "dpp+sae") == 0)
2687 return DPP_AKM_SAE_DPP;
2688 if (os_strcmp(akm, "dpp+psk+sae") == 0)
2689 return DPP_AKM_PSK_SAE_DPP;
2690 if (os_strcmp(akm, "dot1x") == 0)
2691 return DPP_AKM_DOT1X;
2692
2693 pos = akm;
2694 while (*pos) {
2695 if (os_strlen(pos) < 8)
2696 break;
2697 if (os_strncasecmp(pos, "506F9A02", 8) == 0)
2698 dpp = 1;
2699 else if (os_strncasecmp(pos, "000FAC02", 8) == 0)
2700 psk = 1;
2701 else if (os_strncasecmp(pos, "000FAC06", 8) == 0)
2702 psk = 1;
2703 else if (os_strncasecmp(pos, "000FAC08", 8) == 0)
2704 sae = 1;
2705 else if (os_strncasecmp(pos, "000FAC01", 8) == 0)
2706 dot1x = 1;
2707 else if (os_strncasecmp(pos, "000FAC05", 8) == 0)
2708 dot1x = 1;
2709 pos += 8;
2710 if (*pos != '+')
2711 break;
2712 pos++;
2713 }
2714
2715 if (dpp && psk && sae)
2716 return DPP_AKM_PSK_SAE_DPP;
2717 if (dpp && sae)
2718 return DPP_AKM_SAE_DPP;
2719 if (dpp)
2720 return DPP_AKM_DPP;
2721 if (psk && sae)
2722 return DPP_AKM_PSK_SAE;
2723 if (sae)
2724 return DPP_AKM_SAE;
2725 if (psk)
2726 return DPP_AKM_PSK;
2727 if (dot1x)
2728 return DPP_AKM_DOT1X;
2729
2730 return DPP_AKM_UNKNOWN;
2731 }
2732
2733
dpp_parse_conf_obj(struct dpp_authentication * auth,const u8 * conf_obj,u16 conf_obj_len)2734 static int dpp_parse_conf_obj(struct dpp_authentication *auth,
2735 const u8 *conf_obj, u16 conf_obj_len)
2736 {
2737 int ret = -1;
2738 struct json_token *root, *token, *discovery, *cred;
2739 struct dpp_config_obj *conf;
2740 struct wpabuf *ssid64 = NULL;
2741 int legacy;
2742
2743 root = json_parse((const char *) conf_obj, conf_obj_len);
2744 if (!root)
2745 return -1;
2746 if (root->type != JSON_OBJECT) {
2747 dpp_auth_fail(auth, "JSON root is not an object");
2748 goto fail;
2749 }
2750
2751 token = json_get_member(root, "wi-fi_tech");
2752 if (!token || token->type != JSON_STRING) {
2753 dpp_auth_fail(auth, "No wi-fi_tech string value found");
2754 goto fail;
2755 }
2756 if (os_strcmp(token->string, "infra") != 0) {
2757 wpa_printf(MSG_DEBUG, "DPP: Unsupported wi-fi_tech value: '%s'",
2758 token->string);
2759 dpp_auth_fail(auth, "Unsupported wi-fi_tech value");
2760 goto fail;
2761 }
2762
2763 discovery = json_get_member(root, "discovery");
2764 if (!discovery || discovery->type != JSON_OBJECT) {
2765 dpp_auth_fail(auth, "No discovery object in JSON");
2766 goto fail;
2767 }
2768
2769 ssid64 = json_get_member_base64url(discovery, "ssid64");
2770 if (ssid64) {
2771 wpa_hexdump_ascii(MSG_DEBUG, "DPP: discovery::ssid64",
2772 wpabuf_head(ssid64), wpabuf_len(ssid64));
2773 if (wpabuf_len(ssid64) > SSID_MAX_LEN) {
2774 dpp_auth_fail(auth, "Too long discovery::ssid64 value");
2775 goto fail;
2776 }
2777 } else {
2778 token = json_get_member(discovery, "ssid");
2779 if (!token || token->type != JSON_STRING) {
2780 dpp_auth_fail(auth,
2781 "No discovery::ssid string value found");
2782 goto fail;
2783 }
2784 wpa_hexdump_ascii(MSG_DEBUG, "DPP: discovery::ssid",
2785 token->string, os_strlen(token->string));
2786 if (os_strlen(token->string) > SSID_MAX_LEN) {
2787 dpp_auth_fail(auth,
2788 "Too long discovery::ssid string value");
2789 goto fail;
2790 }
2791 }
2792
2793 if (auth->num_conf_obj == DPP_MAX_CONF_OBJ) {
2794 wpa_printf(MSG_DEBUG,
2795 "DPP: No room for this many Config Objects - ignore this one");
2796 ret = 0;
2797 goto fail;
2798 }
2799 conf = &auth->conf_obj[auth->num_conf_obj++];
2800
2801 if (ssid64) {
2802 conf->ssid_len = wpabuf_len(ssid64);
2803 os_memcpy(conf->ssid, wpabuf_head(ssid64), conf->ssid_len);
2804 } else {
2805 conf->ssid_len = os_strlen(token->string);
2806 os_memcpy(conf->ssid, token->string, conf->ssid_len);
2807 }
2808
2809 token = json_get_member(discovery, "ssid_charset");
2810 if (token && token->type == JSON_NUMBER) {
2811 conf->ssid_charset = token->number;
2812 wpa_printf(MSG_DEBUG, "DPP: ssid_charset=%d",
2813 conf->ssid_charset);
2814 }
2815
2816 cred = json_get_member(root, "cred");
2817 if (!cred || cred->type != JSON_OBJECT) {
2818 dpp_auth_fail(auth, "No cred object in JSON");
2819 goto fail;
2820 }
2821
2822 token = json_get_member(cred, "akm");
2823 if (!token || token->type != JSON_STRING) {
2824 dpp_auth_fail(auth, "No cred::akm string value found");
2825 goto fail;
2826 }
2827 conf->akm = dpp_akm_from_str(token->string);
2828
2829 legacy = dpp_akm_legacy(conf->akm);
2830 if (legacy && auth->peer_version >= 2) {
2831 struct json_token *csign, *s_conn;
2832
2833 csign = json_get_member(cred, "csign");
2834 s_conn = json_get_member(cred, "signedConnector");
2835 if (csign && csign->type == JSON_OBJECT &&
2836 s_conn && s_conn->type == JSON_STRING)
2837 legacy = 0;
2838 }
2839 if (legacy) {
2840 if (dpp_parse_cred_legacy(conf, cred) < 0)
2841 goto fail;
2842 } else if (dpp_akm_dpp(conf->akm) ||
2843 (auth->peer_version >= 2 && dpp_akm_legacy(conf->akm))) {
2844 if (dpp_parse_cred_dpp(auth, conf, cred) < 0)
2845 goto fail;
2846 #ifdef CONFIG_DPP2
2847 } else if (conf->akm == DPP_AKM_DOT1X) {
2848 if (dpp_parse_cred_dot1x(auth, conf, cred) < 0 ||
2849 dpp_parse_cred_dpp(auth, conf, cred) < 0)
2850 goto fail;
2851 #endif /* CONFIG_DPP2 */
2852 } else {
2853 wpa_printf(MSG_DEBUG, "DPP: Unsupported akm: %s",
2854 token->string);
2855 dpp_auth_fail(auth, "Unsupported akm");
2856 goto fail;
2857 }
2858
2859 wpa_printf(MSG_DEBUG, "DPP: JSON parsing completed successfully");
2860 ret = 0;
2861 fail:
2862 wpabuf_free(ssid64);
2863 json_free(root);
2864 return ret;
2865 }
2866
2867
2868 #ifdef CONFIG_DPP2
dpp_get_csr_attrs(const u8 * attrs,size_t attrs_len,size_t * len)2869 static u8 * dpp_get_csr_attrs(const u8 *attrs, size_t attrs_len, size_t *len)
2870 {
2871 const u8 *b64;
2872 u16 b64_len;
2873
2874 b64 = dpp_get_attr(attrs, attrs_len, DPP_ATTR_CSR_ATTR_REQ, &b64_len);
2875 if (!b64)
2876 return NULL;
2877 return base64_decode((const char *) b64, b64_len, len);
2878 }
2879 #endif /* CONFIG_DPP2 */
2880
2881
dpp_conf_resp_rx(struct dpp_authentication * auth,const struct wpabuf * resp)2882 int dpp_conf_resp_rx(struct dpp_authentication *auth,
2883 const struct wpabuf *resp)
2884 {
2885 const u8 *wrapped_data, *e_nonce, *status, *conf_obj;
2886 u16 wrapped_data_len, e_nonce_len, status_len, conf_obj_len;
2887 const u8 *env_data;
2888 u16 env_data_len;
2889 const u8 *addr[1];
2890 size_t len[1];
2891 u8 *unwrapped = NULL;
2892 size_t unwrapped_len = 0;
2893 int ret = -1;
2894
2895 auth->conf_resp_status = 255;
2896
2897 if (dpp_check_attrs(wpabuf_head(resp), wpabuf_len(resp)) < 0) {
2898 dpp_auth_fail(auth, "Invalid attribute in config response");
2899 return -1;
2900 }
2901
2902 wrapped_data = dpp_get_attr(wpabuf_head(resp), wpabuf_len(resp),
2903 DPP_ATTR_WRAPPED_DATA,
2904 &wrapped_data_len);
2905 if (!wrapped_data || wrapped_data_len < AES_BLOCK_SIZE) {
2906 dpp_auth_fail(auth,
2907 "Missing or invalid required Wrapped Data attribute");
2908 return -1;
2909 }
2910
2911 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV ciphertext",
2912 wrapped_data, wrapped_data_len);
2913 unwrapped_len = wrapped_data_len - AES_BLOCK_SIZE;
2914 unwrapped = os_malloc(unwrapped_len);
2915 if (!unwrapped)
2916 return -1;
2917
2918 addr[0] = wpabuf_head(resp);
2919 len[0] = wrapped_data - 4 - (const u8 *) wpabuf_head(resp);
2920 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD", addr[0], len[0]);
2921
2922 if (aes_siv_decrypt(auth->ke, auth->curve->hash_len,
2923 wrapped_data, wrapped_data_len,
2924 1, addr, len, unwrapped) < 0) {
2925 dpp_auth_fail(auth, "AES-SIV decryption failed");
2926 goto fail;
2927 }
2928 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV cleartext",
2929 unwrapped, unwrapped_len);
2930
2931 if (dpp_check_attrs(unwrapped, unwrapped_len) < 0) {
2932 dpp_auth_fail(auth, "Invalid attribute in unwrapped data");
2933 goto fail;
2934 }
2935
2936 e_nonce = dpp_get_attr(unwrapped, unwrapped_len,
2937 DPP_ATTR_ENROLLEE_NONCE,
2938 &e_nonce_len);
2939 if (!e_nonce || e_nonce_len != auth->curve->nonce_len) {
2940 dpp_auth_fail(auth,
2941 "Missing or invalid Enrollee Nonce attribute");
2942 goto fail;
2943 }
2944 wpa_hexdump(MSG_DEBUG, "DPP: Enrollee Nonce", e_nonce, e_nonce_len);
2945 if (os_memcmp(e_nonce, auth->e_nonce, e_nonce_len) != 0) {
2946 dpp_auth_fail(auth, "Enrollee Nonce mismatch");
2947 goto fail;
2948 }
2949
2950 status = dpp_get_attr(wpabuf_head(resp), wpabuf_len(resp),
2951 DPP_ATTR_STATUS, &status_len);
2952 if (!status || status_len < 1) {
2953 dpp_auth_fail(auth,
2954 "Missing or invalid required DPP Status attribute");
2955 goto fail;
2956 }
2957 auth->conf_resp_status = status[0];
2958 wpa_printf(MSG_DEBUG, "DPP: Status %u", status[0]);
2959 #ifdef CONFIG_DPP2
2960 if (status[0] == DPP_STATUS_CSR_NEEDED) {
2961 u8 *csrattrs;
2962 size_t csrattrs_len;
2963
2964 wpa_printf(MSG_DEBUG, "DPP: Configurator requested CSR");
2965
2966 csrattrs = dpp_get_csr_attrs(unwrapped, unwrapped_len,
2967 &csrattrs_len);
2968 if (!csrattrs) {
2969 dpp_auth_fail(auth,
2970 "Missing or invalid CSR Attributes Request attribute");
2971 goto fail;
2972 }
2973 wpa_hexdump(MSG_DEBUG, "DPP: CsrAttrs", csrattrs, csrattrs_len);
2974 os_free(auth->csrattrs);
2975 auth->csrattrs = csrattrs;
2976 auth->csrattrs_len = csrattrs_len;
2977 ret = -2;
2978 goto fail;
2979 }
2980 #endif /* CONFIG_DPP2 */
2981 if (status[0] != DPP_STATUS_OK) {
2982 dpp_auth_fail(auth, "Configurator rejected configuration");
2983 goto fail;
2984 }
2985
2986 env_data = dpp_get_attr(unwrapped, unwrapped_len,
2987 DPP_ATTR_ENVELOPED_DATA, &env_data_len);
2988 #ifdef CONFIG_DPP2
2989 if (env_data &&
2990 dpp_conf_resp_env_data(auth, env_data, env_data_len) < 0)
2991 goto fail;
2992 #endif /* CONFIG_DPP2 */
2993
2994 conf_obj = dpp_get_attr(unwrapped, unwrapped_len, DPP_ATTR_CONFIG_OBJ,
2995 &conf_obj_len);
2996 if (!conf_obj && !env_data) {
2997 dpp_auth_fail(auth,
2998 "Missing required Configuration Object attribute");
2999 goto fail;
3000 }
3001 while (conf_obj) {
3002 wpa_hexdump_ascii(MSG_DEBUG, "DPP: configurationObject JSON",
3003 conf_obj, conf_obj_len);
3004 if (dpp_parse_conf_obj(auth, conf_obj, conf_obj_len) < 0)
3005 goto fail;
3006 conf_obj = dpp_get_attr_next(conf_obj, unwrapped, unwrapped_len,
3007 DPP_ATTR_CONFIG_OBJ,
3008 &conf_obj_len);
3009 }
3010
3011 #ifdef CONFIG_DPP2
3012 status = dpp_get_attr(unwrapped, unwrapped_len,
3013 DPP_ATTR_SEND_CONN_STATUS, &status_len);
3014 if (status) {
3015 wpa_printf(MSG_DEBUG,
3016 "DPP: Configurator requested connection status result");
3017 auth->conn_status_requested = 1;
3018 }
3019 #endif /* CONFIG_DPP2 */
3020
3021 ret = 0;
3022
3023 fail:
3024 os_free(unwrapped);
3025 return ret;
3026 }
3027
3028
3029 #ifdef CONFIG_DPP2
3030
dpp_conf_result_rx(struct dpp_authentication * auth,const u8 * hdr,const u8 * attr_start,size_t attr_len)3031 enum dpp_status_error dpp_conf_result_rx(struct dpp_authentication *auth,
3032 const u8 *hdr,
3033 const u8 *attr_start, size_t attr_len)
3034 {
3035 const u8 *wrapped_data, *status, *e_nonce;
3036 u16 wrapped_data_len, status_len, e_nonce_len;
3037 const u8 *addr[2];
3038 size_t len[2];
3039 u8 *unwrapped = NULL;
3040 size_t unwrapped_len = 0;
3041 enum dpp_status_error ret = 256;
3042
3043 wrapped_data = dpp_get_attr(attr_start, attr_len, DPP_ATTR_WRAPPED_DATA,
3044 &wrapped_data_len);
3045 if (!wrapped_data || wrapped_data_len < AES_BLOCK_SIZE) {
3046 dpp_auth_fail(auth,
3047 "Missing or invalid required Wrapped Data attribute");
3048 goto fail;
3049 }
3050 wpa_hexdump(MSG_DEBUG, "DPP: Wrapped data",
3051 wrapped_data, wrapped_data_len);
3052
3053 attr_len = wrapped_data - 4 - attr_start;
3054
3055 addr[0] = hdr;
3056 len[0] = DPP_HDR_LEN;
3057 addr[1] = attr_start;
3058 len[1] = attr_len;
3059 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[0]", addr[0], len[0]);
3060 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[1]", addr[1], len[1]);
3061 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV ciphertext",
3062 wrapped_data, wrapped_data_len);
3063 unwrapped_len = wrapped_data_len - AES_BLOCK_SIZE;
3064 unwrapped = os_malloc(unwrapped_len);
3065 if (!unwrapped)
3066 goto fail;
3067 if (aes_siv_decrypt(auth->ke, auth->curve->hash_len,
3068 wrapped_data, wrapped_data_len,
3069 2, addr, len, unwrapped) < 0) {
3070 dpp_auth_fail(auth, "AES-SIV decryption failed");
3071 goto fail;
3072 }
3073 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV cleartext",
3074 unwrapped, unwrapped_len);
3075
3076 if (dpp_check_attrs(unwrapped, unwrapped_len) < 0) {
3077 dpp_auth_fail(auth, "Invalid attribute in unwrapped data");
3078 goto fail;
3079 }
3080
3081 e_nonce = dpp_get_attr(unwrapped, unwrapped_len,
3082 DPP_ATTR_ENROLLEE_NONCE,
3083 &e_nonce_len);
3084 if (!e_nonce || e_nonce_len != auth->curve->nonce_len) {
3085 dpp_auth_fail(auth,
3086 "Missing or invalid Enrollee Nonce attribute");
3087 goto fail;
3088 }
3089 wpa_hexdump(MSG_DEBUG, "DPP: Enrollee Nonce", e_nonce, e_nonce_len);
3090 if (os_memcmp(e_nonce, auth->e_nonce, e_nonce_len) != 0) {
3091 dpp_auth_fail(auth, "Enrollee Nonce mismatch");
3092 wpa_hexdump(MSG_DEBUG, "DPP: Expected Enrollee Nonce",
3093 auth->e_nonce, e_nonce_len);
3094 goto fail;
3095 }
3096
3097 status = dpp_get_attr(unwrapped, unwrapped_len, DPP_ATTR_STATUS,
3098 &status_len);
3099 if (!status || status_len < 1) {
3100 dpp_auth_fail(auth,
3101 "Missing or invalid required DPP Status attribute");
3102 goto fail;
3103 }
3104 wpa_printf(MSG_DEBUG, "DPP: Status %u", status[0]);
3105 ret = status[0];
3106
3107 fail:
3108 bin_clear_free(unwrapped, unwrapped_len);
3109 return ret;
3110 }
3111
3112
dpp_build_conf_result(struct dpp_authentication * auth,enum dpp_status_error status)3113 struct wpabuf * dpp_build_conf_result(struct dpp_authentication *auth,
3114 enum dpp_status_error status)
3115 {
3116 struct wpabuf *msg, *clear;
3117 size_t nonce_len, clear_len, attr_len;
3118 const u8 *addr[2];
3119 size_t len[2];
3120 u8 *wrapped;
3121
3122 nonce_len = auth->curve->nonce_len;
3123 clear_len = 5 + 4 + nonce_len;
3124 attr_len = 4 + clear_len + AES_BLOCK_SIZE;
3125 clear = wpabuf_alloc(clear_len);
3126 msg = dpp_alloc_msg(DPP_PA_CONFIGURATION_RESULT, attr_len);
3127 if (!clear || !msg)
3128 goto fail;
3129
3130 /* DPP Status */
3131 dpp_build_attr_status(clear, status);
3132
3133 /* E-nonce */
3134 wpabuf_put_le16(clear, DPP_ATTR_ENROLLEE_NONCE);
3135 wpabuf_put_le16(clear, nonce_len);
3136 wpabuf_put_data(clear, auth->e_nonce, nonce_len);
3137
3138 /* OUI, OUI type, Crypto Suite, DPP frame type */
3139 addr[0] = wpabuf_head_u8(msg) + 2;
3140 len[0] = 3 + 1 + 1 + 1;
3141 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[0]", addr[0], len[0]);
3142
3143 /* Attributes before Wrapped Data (none) */
3144 addr[1] = wpabuf_put(msg, 0);
3145 len[1] = 0;
3146 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[1]", addr[1], len[1]);
3147
3148 /* Wrapped Data */
3149 wpabuf_put_le16(msg, DPP_ATTR_WRAPPED_DATA);
3150 wpabuf_put_le16(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
3151 wrapped = wpabuf_put(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
3152
3153 wpa_hexdump_buf(MSG_DEBUG, "DPP: AES-SIV cleartext", clear);
3154 if (aes_siv_encrypt(auth->ke, auth->curve->hash_len,
3155 wpabuf_head(clear), wpabuf_len(clear),
3156 2, addr, len, wrapped) < 0)
3157 goto fail;
3158
3159 wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Result attributes", msg);
3160 wpabuf_free(clear);
3161 return msg;
3162 fail:
3163 wpabuf_free(clear);
3164 wpabuf_free(msg);
3165 return NULL;
3166 }
3167
3168
valid_channel_list(const char * val)3169 static int valid_channel_list(const char *val)
3170 {
3171 while (*val) {
3172 if (!((*val >= '0' && *val <= '9') ||
3173 *val == '/' || *val == ','))
3174 return 0;
3175 val++;
3176 }
3177
3178 return 1;
3179 }
3180
3181
dpp_conn_status_result_rx(struct dpp_authentication * auth,const u8 * hdr,const u8 * attr_start,size_t attr_len,u8 * ssid,size_t * ssid_len,char ** channel_list)3182 enum dpp_status_error dpp_conn_status_result_rx(struct dpp_authentication *auth,
3183 const u8 *hdr,
3184 const u8 *attr_start,
3185 size_t attr_len,
3186 u8 *ssid, size_t *ssid_len,
3187 char **channel_list)
3188 {
3189 const u8 *wrapped_data, *status, *e_nonce;
3190 u16 wrapped_data_len, status_len, e_nonce_len;
3191 const u8 *addr[2];
3192 size_t len[2];
3193 u8 *unwrapped = NULL;
3194 size_t unwrapped_len = 0;
3195 enum dpp_status_error ret = 256;
3196 struct json_token *root = NULL, *token;
3197 struct wpabuf *ssid64;
3198
3199 *ssid_len = 0;
3200 *channel_list = NULL;
3201
3202 wrapped_data = dpp_get_attr(attr_start, attr_len, DPP_ATTR_WRAPPED_DATA,
3203 &wrapped_data_len);
3204 if (!wrapped_data || wrapped_data_len < AES_BLOCK_SIZE) {
3205 dpp_auth_fail(auth,
3206 "Missing or invalid required Wrapped Data attribute");
3207 goto fail;
3208 }
3209 wpa_hexdump(MSG_DEBUG, "DPP: Wrapped data",
3210 wrapped_data, wrapped_data_len);
3211
3212 attr_len = wrapped_data - 4 - attr_start;
3213
3214 addr[0] = hdr;
3215 len[0] = DPP_HDR_LEN;
3216 addr[1] = attr_start;
3217 len[1] = attr_len;
3218 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[0]", addr[0], len[0]);
3219 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[1]", addr[1], len[1]);
3220 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV ciphertext",
3221 wrapped_data, wrapped_data_len);
3222 unwrapped_len = wrapped_data_len - AES_BLOCK_SIZE;
3223 unwrapped = os_malloc(unwrapped_len);
3224 if (!unwrapped)
3225 goto fail;
3226 if (aes_siv_decrypt(auth->ke, auth->curve->hash_len,
3227 wrapped_data, wrapped_data_len,
3228 2, addr, len, unwrapped) < 0) {
3229 dpp_auth_fail(auth, "AES-SIV decryption failed");
3230 goto fail;
3231 }
3232 wpa_hexdump(MSG_DEBUG, "DPP: AES-SIV cleartext",
3233 unwrapped, unwrapped_len);
3234
3235 if (dpp_check_attrs(unwrapped, unwrapped_len) < 0) {
3236 dpp_auth_fail(auth, "Invalid attribute in unwrapped data");
3237 goto fail;
3238 }
3239
3240 e_nonce = dpp_get_attr(unwrapped, unwrapped_len,
3241 DPP_ATTR_ENROLLEE_NONCE,
3242 &e_nonce_len);
3243 if (!e_nonce || e_nonce_len != auth->curve->nonce_len) {
3244 dpp_auth_fail(auth,
3245 "Missing or invalid Enrollee Nonce attribute");
3246 goto fail;
3247 }
3248 wpa_hexdump(MSG_DEBUG, "DPP: Enrollee Nonce", e_nonce, e_nonce_len);
3249 if (os_memcmp(e_nonce, auth->e_nonce, e_nonce_len) != 0) {
3250 dpp_auth_fail(auth, "Enrollee Nonce mismatch");
3251 wpa_hexdump(MSG_DEBUG, "DPP: Expected Enrollee Nonce",
3252 auth->e_nonce, e_nonce_len);
3253 goto fail;
3254 }
3255
3256 status = dpp_get_attr(unwrapped, unwrapped_len, DPP_ATTR_CONN_STATUS,
3257 &status_len);
3258 if (!status) {
3259 dpp_auth_fail(auth,
3260 "Missing required DPP Connection Status attribute");
3261 goto fail;
3262 }
3263 wpa_hexdump_ascii(MSG_DEBUG, "DPP: connStatus JSON",
3264 status, status_len);
3265
3266 root = json_parse((const char *) status, status_len);
3267 if (!root) {
3268 dpp_auth_fail(auth, "Could not parse connStatus");
3269 goto fail;
3270 }
3271
3272 ssid64 = json_get_member_base64url(root, "ssid64");
3273 if (ssid64 && wpabuf_len(ssid64) <= SSID_MAX_LEN) {
3274 *ssid_len = wpabuf_len(ssid64);
3275 os_memcpy(ssid, wpabuf_head(ssid64), *ssid_len);
3276 }
3277 wpabuf_free(ssid64);
3278
3279 token = json_get_member(root, "channelList");
3280 if (token && token->type == JSON_STRING &&
3281 valid_channel_list(token->string))
3282 *channel_list = os_strdup(token->string);
3283
3284 token = json_get_member(root, "result");
3285 if (!token || token->type != JSON_NUMBER) {
3286 dpp_auth_fail(auth, "No connStatus - result");
3287 goto fail;
3288 }
3289 wpa_printf(MSG_DEBUG, "DPP: result %d", token->number);
3290 ret = token->number;
3291
3292 fail:
3293 json_free(root);
3294 bin_clear_free(unwrapped, unwrapped_len);
3295 return ret;
3296 }
3297
3298
dpp_build_conn_status(enum dpp_status_error result,const u8 * ssid,size_t ssid_len,const char * channel_list)3299 struct wpabuf * dpp_build_conn_status(enum dpp_status_error result,
3300 const u8 *ssid, size_t ssid_len,
3301 const char *channel_list)
3302 {
3303 struct wpabuf *json;
3304
3305 json = wpabuf_alloc(1000);
3306 if (!json)
3307 return NULL;
3308 json_start_object(json, NULL);
3309 json_add_int(json, "result", result);
3310 if (ssid) {
3311 json_value_sep(json);
3312 if (json_add_base64url(json, "ssid64", ssid, ssid_len) < 0) {
3313 wpabuf_free(json);
3314 return NULL;
3315 }
3316 }
3317 if (channel_list) {
3318 json_value_sep(json);
3319 json_add_string(json, "channelList", channel_list);
3320 }
3321 json_end_object(json);
3322 wpa_hexdump_ascii(MSG_DEBUG, "DPP: connStatus JSON",
3323 wpabuf_head(json), wpabuf_len(json));
3324
3325 return json;
3326 }
3327
3328
dpp_build_conn_status_result(struct dpp_authentication * auth,enum dpp_status_error result,const u8 * ssid,size_t ssid_len,const char * channel_list)3329 struct wpabuf * dpp_build_conn_status_result(struct dpp_authentication *auth,
3330 enum dpp_status_error result,
3331 const u8 *ssid, size_t ssid_len,
3332 const char *channel_list)
3333 {
3334 struct wpabuf *msg = NULL, *clear = NULL, *json;
3335 size_t nonce_len, clear_len, attr_len;
3336 const u8 *addr[2];
3337 size_t len[2];
3338 u8 *wrapped;
3339
3340 json = dpp_build_conn_status(result, ssid, ssid_len, channel_list);
3341 if (!json)
3342 return NULL;
3343
3344 nonce_len = auth->curve->nonce_len;
3345 clear_len = 5 + 4 + nonce_len + 4 + wpabuf_len(json);
3346 attr_len = 4 + clear_len + AES_BLOCK_SIZE;
3347 clear = wpabuf_alloc(clear_len);
3348 msg = dpp_alloc_msg(DPP_PA_CONNECTION_STATUS_RESULT, attr_len);
3349 if (!clear || !msg)
3350 goto fail;
3351
3352 /* E-nonce */
3353 wpabuf_put_le16(clear, DPP_ATTR_ENROLLEE_NONCE);
3354 wpabuf_put_le16(clear, nonce_len);
3355 wpabuf_put_data(clear, auth->e_nonce, nonce_len);
3356
3357 /* DPP Connection Status */
3358 wpabuf_put_le16(clear, DPP_ATTR_CONN_STATUS);
3359 wpabuf_put_le16(clear, wpabuf_len(json));
3360 wpabuf_put_buf(clear, json);
3361
3362 /* OUI, OUI type, Crypto Suite, DPP frame type */
3363 addr[0] = wpabuf_head_u8(msg) + 2;
3364 len[0] = 3 + 1 + 1 + 1;
3365 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[0]", addr[0], len[0]);
3366
3367 /* Attributes before Wrapped Data (none) */
3368 addr[1] = wpabuf_put(msg, 0);
3369 len[1] = 0;
3370 wpa_hexdump(MSG_DEBUG, "DDP: AES-SIV AD[1]", addr[1], len[1]);
3371
3372 /* Wrapped Data */
3373 wpabuf_put_le16(msg, DPP_ATTR_WRAPPED_DATA);
3374 wpabuf_put_le16(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
3375 wrapped = wpabuf_put(msg, wpabuf_len(clear) + AES_BLOCK_SIZE);
3376
3377 wpa_hexdump_buf(MSG_DEBUG, "DPP: AES-SIV cleartext", clear);
3378 if (aes_siv_encrypt(auth->ke, auth->curve->hash_len,
3379 wpabuf_head(clear), wpabuf_len(clear),
3380 2, addr, len, wrapped) < 0)
3381 goto fail;
3382
3383 wpa_hexdump_buf(MSG_DEBUG, "DPP: Connection Status Result attributes",
3384 msg);
3385 wpabuf_free(json);
3386 wpabuf_free(clear);
3387 return msg;
3388 fail:
3389 wpabuf_free(json);
3390 wpabuf_free(clear);
3391 wpabuf_free(msg);
3392 return NULL;
3393 }
3394
3395 #endif /* CONFIG_DPP2 */
3396
3397
dpp_configurator_free(struct dpp_configurator * conf)3398 void dpp_configurator_free(struct dpp_configurator *conf)
3399 {
3400 if (!conf)
3401 return;
3402 EVP_PKEY_free(conf->csign);
3403 os_free(conf->kid);
3404 os_free(conf->connector);
3405 EVP_PKEY_free(conf->connector_key);
3406 EVP_PKEY_free(conf->pp_key);
3407 os_free(conf);
3408 }
3409
3410
dpp_configurator_get_key(const struct dpp_configurator * conf,char * buf,size_t buflen)3411 int dpp_configurator_get_key(const struct dpp_configurator *conf, char *buf,
3412 size_t buflen)
3413 {
3414 EC_KEY *eckey;
3415 int key_len, ret = -1;
3416 unsigned char *key = NULL;
3417
3418 if (!conf->csign)
3419 return -1;
3420
3421 eckey = EVP_PKEY_get1_EC_KEY(conf->csign);
3422 if (!eckey)
3423 return -1;
3424
3425 key_len = i2d_ECPrivateKey(eckey, &key);
3426 if (key_len > 0)
3427 ret = wpa_snprintf_hex(buf, buflen, key, key_len);
3428
3429 EC_KEY_free(eckey);
3430 OPENSSL_free(key);
3431 return ret;
3432 }
3433
3434
dpp_configurator_gen_kid(struct dpp_configurator * conf)3435 static int dpp_configurator_gen_kid(struct dpp_configurator *conf)
3436 {
3437 struct wpabuf *csign_pub = NULL;
3438 const u8 *addr[1];
3439 size_t len[1];
3440 int res;
3441
3442 csign_pub = dpp_get_pubkey_point(conf->csign, 1);
3443 if (!csign_pub) {
3444 wpa_printf(MSG_INFO, "DPP: Failed to extract C-sign-key");
3445 return -1;
3446 }
3447
3448 /* kid = SHA256(ANSI X9.63 uncompressed C-sign-key) */
3449 addr[0] = wpabuf_head(csign_pub);
3450 len[0] = wpabuf_len(csign_pub);
3451 res = sha256_vector(1, addr, len, conf->kid_hash);
3452 wpabuf_free(csign_pub);
3453 if (res < 0) {
3454 wpa_printf(MSG_DEBUG,
3455 "DPP: Failed to derive kid for C-sign-key");
3456 return -1;
3457 }
3458
3459 conf->kid = base64_url_encode(conf->kid_hash, sizeof(conf->kid_hash),
3460 NULL);
3461 return conf->kid ? 0 : -1;
3462 }
3463
3464
3465 static struct dpp_configurator *
dpp_keygen_configurator(const char * curve,const u8 * privkey,size_t privkey_len,const u8 * pp_key,size_t pp_key_len)3466 dpp_keygen_configurator(const char *curve, const u8 *privkey,
3467 size_t privkey_len, const u8 *pp_key, size_t pp_key_len)
3468 {
3469 struct dpp_configurator *conf;
3470
3471 conf = os_zalloc(sizeof(*conf));
3472 if (!conf)
3473 return NULL;
3474
3475 conf->curve = dpp_get_curve_name(curve);
3476 if (!conf->curve) {
3477 wpa_printf(MSG_INFO, "DPP: Unsupported curve: %s", curve);
3478 os_free(conf);
3479 return NULL;
3480 }
3481
3482 if (privkey)
3483 conf->csign = dpp_set_keypair(&conf->curve, privkey,
3484 privkey_len);
3485 else
3486 conf->csign = dpp_gen_keypair(conf->curve);
3487 if (pp_key)
3488 conf->pp_key = dpp_set_keypair(&conf->curve, pp_key,
3489 pp_key_len);
3490 else
3491 conf->pp_key = dpp_gen_keypair(conf->curve);
3492 if (!conf->csign || !conf->pp_key)
3493 goto fail;
3494 conf->own = 1;
3495
3496 if (dpp_configurator_gen_kid(conf) < 0)
3497 goto fail;
3498 return conf;
3499 fail:
3500 dpp_configurator_free(conf);
3501 return NULL;
3502 }
3503
3504
dpp_configurator_own_config(struct dpp_authentication * auth,const char * curve,int ap)3505 int dpp_configurator_own_config(struct dpp_authentication *auth,
3506 const char *curve, int ap)
3507 {
3508 struct wpabuf *conf_obj;
3509 int ret = -1;
3510
3511 if (!auth->conf) {
3512 wpa_printf(MSG_DEBUG, "DPP: No configurator specified");
3513 return -1;
3514 }
3515
3516 auth->curve = dpp_get_curve_name(curve);
3517 if (!auth->curve) {
3518 wpa_printf(MSG_INFO, "DPP: Unsupported curve: %s", curve);
3519 return -1;
3520 }
3521
3522 wpa_printf(MSG_DEBUG,
3523 "DPP: Building own configuration/connector with curve %s",
3524 auth->curve->name);
3525
3526 auth->own_protocol_key = dpp_gen_keypair(auth->curve);
3527 if (!auth->own_protocol_key)
3528 return -1;
3529 dpp_copy_netaccesskey(auth, &auth->conf_obj[0]);
3530 auth->peer_protocol_key = auth->own_protocol_key;
3531 dpp_copy_csign(&auth->conf_obj[0], auth->conf->csign);
3532
3533 conf_obj = dpp_build_conf_obj(auth, ap, 0, NULL);
3534 if (!conf_obj) {
3535 wpabuf_free(auth->conf_obj[0].c_sign_key);
3536 auth->conf_obj[0].c_sign_key = NULL;
3537 goto fail;
3538 }
3539 ret = dpp_parse_conf_obj(auth, wpabuf_head(conf_obj),
3540 wpabuf_len(conf_obj));
3541 fail:
3542 wpabuf_free(conf_obj);
3543 auth->peer_protocol_key = NULL;
3544 return ret;
3545 }
3546
3547
dpp_compatible_netrole(const char * role1,const char * role2)3548 static int dpp_compatible_netrole(const char *role1, const char *role2)
3549 {
3550 return (os_strcmp(role1, "sta") == 0 && os_strcmp(role2, "ap") == 0) ||
3551 (os_strcmp(role1, "ap") == 0 && os_strcmp(role2, "sta") == 0);
3552 }
3553
3554
dpp_connector_compatible_group(struct json_token * root,const char * group_id,const char * net_role,bool reconfig)3555 static int dpp_connector_compatible_group(struct json_token *root,
3556 const char *group_id,
3557 const char *net_role,
3558 bool reconfig)
3559 {
3560 struct json_token *groups, *token;
3561
3562 groups = json_get_member(root, "groups");
3563 if (!groups || groups->type != JSON_ARRAY)
3564 return 0;
3565
3566 for (token = groups->child; token; token = token->sibling) {
3567 struct json_token *id, *role;
3568
3569 id = json_get_member(token, "groupId");
3570 if (!id || id->type != JSON_STRING)
3571 continue;
3572
3573 role = json_get_member(token, "netRole");
3574 if (!role || role->type != JSON_STRING)
3575 continue;
3576
3577 if (os_strcmp(id->string, "*") != 0 &&
3578 os_strcmp(group_id, "*") != 0 &&
3579 os_strcmp(id->string, group_id) != 0)
3580 continue;
3581
3582 if (reconfig && os_strcmp(net_role, "configurator") == 0)
3583 return 1;
3584 if (!reconfig && dpp_compatible_netrole(role->string, net_role))
3585 return 1;
3586 }
3587
3588 return 0;
3589 }
3590
3591
dpp_connector_match_groups(struct json_token * own_root,struct json_token * peer_root,bool reconfig)3592 int dpp_connector_match_groups(struct json_token *own_root,
3593 struct json_token *peer_root, bool reconfig)
3594 {
3595 struct json_token *groups, *token;
3596
3597 groups = json_get_member(peer_root, "groups");
3598 if (!groups || groups->type != JSON_ARRAY) {
3599 wpa_printf(MSG_DEBUG, "DPP: No peer groups array found");
3600 return 0;
3601 }
3602
3603 for (token = groups->child; token; token = token->sibling) {
3604 struct json_token *id, *role;
3605
3606 id = json_get_member(token, "groupId");
3607 if (!id || id->type != JSON_STRING) {
3608 wpa_printf(MSG_DEBUG,
3609 "DPP: Missing peer groupId string");
3610 continue;
3611 }
3612
3613 role = json_get_member(token, "netRole");
3614 if (!role || role->type != JSON_STRING) {
3615 wpa_printf(MSG_DEBUG,
3616 "DPP: Missing peer groups::netRole string");
3617 continue;
3618 }
3619 wpa_printf(MSG_DEBUG,
3620 "DPP: peer connector group: groupId='%s' netRole='%s'",
3621 id->string, role->string);
3622 if (dpp_connector_compatible_group(own_root, id->string,
3623 role->string, reconfig)) {
3624 wpa_printf(MSG_DEBUG,
3625 "DPP: Compatible group/netRole in own connector");
3626 return 1;
3627 }
3628 }
3629
3630 return 0;
3631 }
3632
3633
dpp_parse_own_connector(const char * own_connector)3634 struct json_token * dpp_parse_own_connector(const char *own_connector)
3635 {
3636 unsigned char *own_conn;
3637 size_t own_conn_len;
3638 const char *pos, *end;
3639 struct json_token *own_root;
3640
3641 pos = os_strchr(own_connector, '.');
3642 if (!pos) {
3643 wpa_printf(MSG_DEBUG, "DPP: Own connector is missing the first dot (.)");
3644 return NULL;
3645 }
3646 pos++;
3647 end = os_strchr(pos, '.');
3648 if (!end) {
3649 wpa_printf(MSG_DEBUG, "DPP: Own connector is missing the second dot (.)");
3650 return NULL;
3651 }
3652 own_conn = base64_url_decode(pos, end - pos, &own_conn_len);
3653 if (!own_conn) {
3654 wpa_printf(MSG_DEBUG,
3655 "DPP: Failed to base64url decode own signedConnector JWS Payload");
3656 return NULL;
3657 }
3658
3659 own_root = json_parse((const char *) own_conn, own_conn_len);
3660 os_free(own_conn);
3661 if (!own_root)
3662 wpa_printf(MSG_DEBUG, "DPP: Failed to parse local connector");
3663
3664 return own_root;
3665 }
3666
3667
3668 enum dpp_status_error
dpp_peer_intro(struct dpp_introduction * intro,const char * own_connector,const u8 * net_access_key,size_t net_access_key_len,const u8 * csign_key,size_t csign_key_len,const u8 * peer_connector,size_t peer_connector_len,os_time_t * expiry)3669 dpp_peer_intro(struct dpp_introduction *intro, const char *own_connector,
3670 const u8 *net_access_key, size_t net_access_key_len,
3671 const u8 *csign_key, size_t csign_key_len,
3672 const u8 *peer_connector, size_t peer_connector_len,
3673 os_time_t *expiry)
3674 {
3675 struct json_token *root = NULL, *netkey, *token;
3676 struct json_token *own_root = NULL;
3677 enum dpp_status_error ret = 255, res;
3678 EVP_PKEY *own_key = NULL, *peer_key = NULL;
3679 struct wpabuf *own_key_pub = NULL;
3680 const struct dpp_curve_params *curve, *own_curve;
3681 struct dpp_signed_connector_info info;
3682 size_t Nx_len;
3683 u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
3684
3685 os_memset(intro, 0, sizeof(*intro));
3686 os_memset(&info, 0, sizeof(info));
3687 if (expiry)
3688 *expiry = 0;
3689
3690 own_key = dpp_set_keypair(&own_curve, net_access_key,
3691 net_access_key_len);
3692 if (!own_key) {
3693 wpa_printf(MSG_ERROR, "DPP: Failed to parse own netAccessKey");
3694 goto fail;
3695 }
3696
3697 own_root = dpp_parse_own_connector(own_connector);
3698 if (!own_root)
3699 goto fail;
3700
3701 res = dpp_check_signed_connector(&info, csign_key, csign_key_len,
3702 peer_connector, peer_connector_len);
3703 if (res != DPP_STATUS_OK) {
3704 ret = res;
3705 goto fail;
3706 }
3707
3708 root = json_parse((const char *) info.payload, info.payload_len);
3709 if (!root) {
3710 wpa_printf(MSG_DEBUG, "DPP: JSON parsing of connector failed");
3711 ret = DPP_STATUS_INVALID_CONNECTOR;
3712 goto fail;
3713 }
3714
3715 if (!dpp_connector_match_groups(own_root, root, false)) {
3716 wpa_printf(MSG_DEBUG,
3717 "DPP: Peer connector does not include compatible group netrole with own connector");
3718 ret = DPP_STATUS_NO_MATCH;
3719 goto fail;
3720 }
3721
3722 token = json_get_member(root, "expiry");
3723 if (!token || token->type != JSON_STRING) {
3724 wpa_printf(MSG_DEBUG,
3725 "DPP: No expiry string found - connector does not expire");
3726 } else {
3727 wpa_printf(MSG_DEBUG, "DPP: expiry = %s", token->string);
3728 if (dpp_key_expired(token->string, expiry)) {
3729 wpa_printf(MSG_DEBUG,
3730 "DPP: Connector (netAccessKey) has expired");
3731 ret = DPP_STATUS_INVALID_CONNECTOR;
3732 goto fail;
3733 }
3734 }
3735
3736 netkey = json_get_member(root, "netAccessKey");
3737 if (!netkey || netkey->type != JSON_OBJECT) {
3738 wpa_printf(MSG_DEBUG, "DPP: No netAccessKey object found");
3739 ret = DPP_STATUS_INVALID_CONNECTOR;
3740 goto fail;
3741 }
3742
3743 peer_key = dpp_parse_jwk(netkey, &curve);
3744 if (!peer_key) {
3745 ret = DPP_STATUS_INVALID_CONNECTOR;
3746 goto fail;
3747 }
3748 dpp_debug_print_key("DPP: Received netAccessKey", peer_key);
3749
3750 if (own_curve != curve) {
3751 wpa_printf(MSG_DEBUG,
3752 "DPP: Mismatching netAccessKey curves (%s != %s)",
3753 own_curve->name, curve->name);
3754 ret = DPP_STATUS_INVALID_CONNECTOR;
3755 goto fail;
3756 }
3757
3758 /* ECDH: N = nk * PK */
3759 if (dpp_ecdh(own_key, peer_key, Nx, &Nx_len) < 0)
3760 goto fail;
3761
3762 wpa_hexdump_key(MSG_DEBUG, "DPP: ECDH shared secret (N.x)",
3763 Nx, Nx_len);
3764
3765 /* PMK = HKDF(<>, "DPP PMK", N.x) */
3766 if (dpp_derive_pmk(Nx, Nx_len, intro->pmk, curve->hash_len) < 0) {
3767 wpa_printf(MSG_ERROR, "DPP: Failed to derive PMK");
3768 goto fail;
3769 }
3770 intro->pmk_len = curve->hash_len;
3771
3772 /* PMKID = Truncate-128(H(min(NK.x, PK.x) | max(NK.x, PK.x))) */
3773 if (dpp_derive_pmkid(curve, own_key, peer_key, intro->pmkid) < 0) {
3774 wpa_printf(MSG_ERROR, "DPP: Failed to derive PMKID");
3775 goto fail;
3776 }
3777
3778 ret = DPP_STATUS_OK;
3779 fail:
3780 if (ret != DPP_STATUS_OK)
3781 os_memset(intro, 0, sizeof(*intro));
3782 os_memset(Nx, 0, sizeof(Nx));
3783 os_free(info.payload);
3784 EVP_PKEY_free(own_key);
3785 wpabuf_free(own_key_pub);
3786 EVP_PKEY_free(peer_key);
3787 json_free(root);
3788 json_free(own_root);
3789 return ret;
3790 }
3791
3792
dpp_next_id(struct dpp_global * dpp)3793 unsigned int dpp_next_id(struct dpp_global *dpp)
3794 {
3795 struct dpp_bootstrap_info *bi;
3796 unsigned int max_id = 0;
3797
3798 dl_list_for_each(bi, &dpp->bootstrap, struct dpp_bootstrap_info, list) {
3799 if (bi->id > max_id)
3800 max_id = bi->id;
3801 }
3802 return max_id + 1;
3803 }
3804
3805
dpp_bootstrap_del(struct dpp_global * dpp,unsigned int id)3806 static int dpp_bootstrap_del(struct dpp_global *dpp, unsigned int id)
3807 {
3808 struct dpp_bootstrap_info *bi, *tmp;
3809 int found = 0;
3810
3811 if (!dpp)
3812 return -1;
3813
3814 dl_list_for_each_safe(bi, tmp, &dpp->bootstrap,
3815 struct dpp_bootstrap_info, list) {
3816 if (id && bi->id != id)
3817 continue;
3818 found = 1;
3819 #ifdef CONFIG_DPP2
3820 if (dpp->remove_bi)
3821 dpp->remove_bi(dpp->cb_ctx, bi);
3822 #endif /* CONFIG_DPP2 */
3823 dl_list_del(&bi->list);
3824 dpp_bootstrap_info_free(bi);
3825 }
3826
3827 if (id == 0)
3828 return 0; /* flush succeeds regardless of entries found */
3829 return found ? 0 : -1;
3830 }
3831
3832
dpp_add_qr_code(struct dpp_global * dpp,const char * uri)3833 struct dpp_bootstrap_info * dpp_add_qr_code(struct dpp_global *dpp,
3834 const char *uri)
3835 {
3836 struct dpp_bootstrap_info *bi;
3837
3838 if (!dpp)
3839 return NULL;
3840
3841 bi = dpp_parse_uri(uri);
3842 if (!bi)
3843 return NULL;
3844
3845 bi->type = DPP_BOOTSTRAP_QR_CODE;
3846 bi->id = dpp_next_id(dpp);
3847 dl_list_add(&dpp->bootstrap, &bi->list);
3848 return bi;
3849 }
3850
3851
dpp_add_nfc_uri(struct dpp_global * dpp,const char * uri)3852 struct dpp_bootstrap_info * dpp_add_nfc_uri(struct dpp_global *dpp,
3853 const char *uri)
3854 {
3855 struct dpp_bootstrap_info *bi;
3856
3857 if (!dpp)
3858 return NULL;
3859
3860 bi = dpp_parse_uri(uri);
3861 if (!bi)
3862 return NULL;
3863
3864 bi->type = DPP_BOOTSTRAP_NFC_URI;
3865 bi->id = dpp_next_id(dpp);
3866 dl_list_add(&dpp->bootstrap, &bi->list);
3867 return bi;
3868 }
3869
3870
dpp_bootstrap_gen(struct dpp_global * dpp,const char * cmd)3871 int dpp_bootstrap_gen(struct dpp_global *dpp, const char *cmd)
3872 {
3873 char *mac = NULL, *info = NULL, *curve = NULL;
3874 char *key = NULL;
3875 u8 *privkey = NULL;
3876 size_t privkey_len = 0;
3877 int ret = -1;
3878 struct dpp_bootstrap_info *bi;
3879
3880 if (!dpp)
3881 return -1;
3882
3883 bi = os_zalloc(sizeof(*bi));
3884 if (!bi)
3885 goto fail;
3886
3887 if (os_strstr(cmd, "type=qrcode"))
3888 bi->type = DPP_BOOTSTRAP_QR_CODE;
3889 else if (os_strstr(cmd, "type=pkex"))
3890 bi->type = DPP_BOOTSTRAP_PKEX;
3891 else if (os_strstr(cmd, "type=nfc-uri"))
3892 bi->type = DPP_BOOTSTRAP_NFC_URI;
3893 else
3894 goto fail;
3895
3896 bi->chan = get_param(cmd, " chan=");
3897 mac = get_param(cmd, " mac=");
3898 info = get_param(cmd, " info=");
3899 curve = get_param(cmd, " curve=");
3900 key = get_param(cmd, " key=");
3901
3902 if (key) {
3903 privkey_len = os_strlen(key) / 2;
3904 privkey = os_malloc(privkey_len);
3905 if (!privkey ||
3906 hexstr2bin(key, privkey, privkey_len) < 0)
3907 goto fail;
3908 }
3909
3910 if (dpp_keygen(bi, curve, privkey, privkey_len) < 0 ||
3911 dpp_parse_uri_chan_list(bi, bi->chan) < 0 ||
3912 dpp_parse_uri_mac(bi, mac) < 0 ||
3913 dpp_parse_uri_info(bi, info) < 0 ||
3914 dpp_gen_uri(bi) < 0)
3915 goto fail;
3916
3917 bi->id = dpp_next_id(dpp);
3918 dl_list_add(&dpp->bootstrap, &bi->list);
3919 ret = bi->id;
3920 bi = NULL;
3921 fail:
3922 os_free(curve);
3923 os_free(mac);
3924 os_free(info);
3925 str_clear_free(key);
3926 bin_clear_free(privkey, privkey_len);
3927 dpp_bootstrap_info_free(bi);
3928 return ret;
3929 }
3930
3931
3932 struct dpp_bootstrap_info *
dpp_bootstrap_get_id(struct dpp_global * dpp,unsigned int id)3933 dpp_bootstrap_get_id(struct dpp_global *dpp, unsigned int id)
3934 {
3935 struct dpp_bootstrap_info *bi;
3936
3937 if (!dpp)
3938 return NULL;
3939
3940 dl_list_for_each(bi, &dpp->bootstrap, struct dpp_bootstrap_info, list) {
3941 if (bi->id == id)
3942 return bi;
3943 }
3944 return NULL;
3945 }
3946
3947
dpp_bootstrap_remove(struct dpp_global * dpp,const char * id)3948 int dpp_bootstrap_remove(struct dpp_global *dpp, const char *id)
3949 {
3950 unsigned int id_val;
3951
3952 if (os_strcmp(id, "*") == 0) {
3953 id_val = 0;
3954 } else {
3955 id_val = atoi(id);
3956 if (id_val == 0)
3957 return -1;
3958 }
3959
3960 return dpp_bootstrap_del(dpp, id_val);
3961 }
3962
3963
dpp_bootstrap_get_uri(struct dpp_global * dpp,unsigned int id)3964 const char * dpp_bootstrap_get_uri(struct dpp_global *dpp, unsigned int id)
3965 {
3966 struct dpp_bootstrap_info *bi;
3967
3968 bi = dpp_bootstrap_get_id(dpp, id);
3969 if (!bi)
3970 return NULL;
3971 return bi->uri;
3972 }
3973
3974
dpp_bootstrap_info(struct dpp_global * dpp,int id,char * reply,int reply_size)3975 int dpp_bootstrap_info(struct dpp_global *dpp, int id,
3976 char *reply, int reply_size)
3977 {
3978 struct dpp_bootstrap_info *bi;
3979 char pkhash[2 * SHA256_MAC_LEN + 1];
3980
3981 bi = dpp_bootstrap_get_id(dpp, id);
3982 if (!bi)
3983 return -1;
3984 wpa_snprintf_hex(pkhash, sizeof(pkhash), bi->pubkey_hash,
3985 SHA256_MAC_LEN);
3986 return os_snprintf(reply, reply_size, "type=%s\n"
3987 "mac_addr=" MACSTR "\n"
3988 "info=%s\n"
3989 "num_freq=%u\n"
3990 "use_freq=%u\n"
3991 "curve=%s\n"
3992 "pkhash=%s\n"
3993 "version=%d\n",
3994 dpp_bootstrap_type_txt(bi->type),
3995 MAC2STR(bi->mac_addr),
3996 bi->info ? bi->info : "",
3997 bi->num_freq,
3998 bi->num_freq == 1 ? bi->freq[0] : 0,
3999 bi->curve->name,
4000 pkhash,
4001 bi->version);
4002 }
4003
4004
dpp_bootstrap_set(struct dpp_global * dpp,int id,const char * params)4005 int dpp_bootstrap_set(struct dpp_global *dpp, int id, const char *params)
4006 {
4007 struct dpp_bootstrap_info *bi;
4008
4009 bi = dpp_bootstrap_get_id(dpp, id);
4010 if (!bi)
4011 return -1;
4012
4013 str_clear_free(bi->configurator_params);
4014
4015 if (params) {
4016 bi->configurator_params = os_strdup(params);
4017 return bi->configurator_params ? 0 : -1;
4018 }
4019
4020 bi->configurator_params = NULL;
4021 return 0;
4022 }
4023
4024
dpp_bootstrap_find_pair(struct dpp_global * dpp,const u8 * i_bootstrap,const u8 * r_bootstrap,struct dpp_bootstrap_info ** own_bi,struct dpp_bootstrap_info ** peer_bi)4025 void dpp_bootstrap_find_pair(struct dpp_global *dpp, const u8 *i_bootstrap,
4026 const u8 *r_bootstrap,
4027 struct dpp_bootstrap_info **own_bi,
4028 struct dpp_bootstrap_info **peer_bi)
4029 {
4030 struct dpp_bootstrap_info *bi;
4031
4032 *own_bi = NULL;
4033 *peer_bi = NULL;
4034 if (!dpp)
4035 return;
4036
4037 dl_list_for_each(bi, &dpp->bootstrap, struct dpp_bootstrap_info, list) {
4038 if (!*own_bi && bi->own &&
4039 os_memcmp(bi->pubkey_hash, r_bootstrap,
4040 SHA256_MAC_LEN) == 0) {
4041 wpa_printf(MSG_DEBUG,
4042 "DPP: Found matching own bootstrapping information");
4043 *own_bi = bi;
4044 }
4045
4046 if (!*peer_bi && !bi->own &&
4047 os_memcmp(bi->pubkey_hash, i_bootstrap,
4048 SHA256_MAC_LEN) == 0) {
4049 wpa_printf(MSG_DEBUG,
4050 "DPP: Found matching peer bootstrapping information");
4051 *peer_bi = bi;
4052 }
4053
4054 if (*own_bi && *peer_bi)
4055 break;
4056 }
4057 }
4058
4059
4060 #ifdef CONFIG_DPP2
dpp_bootstrap_find_chirp(struct dpp_global * dpp,const u8 * hash)4061 struct dpp_bootstrap_info * dpp_bootstrap_find_chirp(struct dpp_global *dpp,
4062 const u8 *hash)
4063 {
4064 struct dpp_bootstrap_info *bi;
4065
4066 if (!dpp)
4067 return NULL;
4068
4069 dl_list_for_each(bi, &dpp->bootstrap, struct dpp_bootstrap_info, list) {
4070 if (!bi->own && os_memcmp(bi->pubkey_hash_chirp, hash,
4071 SHA256_MAC_LEN) == 0)
4072 return bi;
4073 }
4074
4075 return NULL;
4076 }
4077 #endif /* CONFIG_DPP2 */
4078
4079
dpp_nfc_update_bi_channel(struct dpp_bootstrap_info * own_bi,struct dpp_bootstrap_info * peer_bi)4080 static int dpp_nfc_update_bi_channel(struct dpp_bootstrap_info *own_bi,
4081 struct dpp_bootstrap_info *peer_bi)
4082 {
4083 unsigned int i, freq = 0;
4084 enum hostapd_hw_mode mode;
4085 u8 op_class, channel;
4086 char chan[20];
4087
4088 if (peer_bi->num_freq == 0 && !peer_bi->channels_listed)
4089 return 0; /* no channel preference/constraint */
4090
4091 for (i = 0; i < peer_bi->num_freq; i++) {
4092 if ((own_bi->num_freq == 0 && !own_bi->channels_listed) ||
4093 freq_included(own_bi->freq, own_bi->num_freq,
4094 peer_bi->freq[i])) {
4095 freq = peer_bi->freq[i];
4096 break;
4097 }
4098 }
4099 if (!freq) {
4100 wpa_printf(MSG_DEBUG, "DPP: No common channel found");
4101 return -1;
4102 }
4103
4104 mode = ieee80211_freq_to_channel_ext(freq, 0, 0, &op_class, &channel);
4105 if (mode == NUM_HOSTAPD_MODES) {
4106 wpa_printf(MSG_DEBUG,
4107 "DPP: Could not determine operating class or channel number for %u MHz",
4108 freq);
4109 }
4110
4111 wpa_printf(MSG_DEBUG,
4112 "DPP: Selected %u MHz (op_class %u channel %u) as the negotiation channel based on information from NFC negotiated handover",
4113 freq, op_class, channel);
4114 os_snprintf(chan, sizeof(chan), "%u/%u", op_class, channel);
4115 os_free(own_bi->chan);
4116 own_bi->chan = os_strdup(chan);
4117 own_bi->freq[0] = freq;
4118 own_bi->num_freq = 1;
4119 os_free(peer_bi->chan);
4120 peer_bi->chan = os_strdup(chan);
4121 peer_bi->freq[0] = freq;
4122 peer_bi->num_freq = 1;
4123
4124 return dpp_gen_uri(own_bi);
4125 }
4126
4127
dpp_nfc_update_bi_key(struct dpp_bootstrap_info * own_bi,struct dpp_bootstrap_info * peer_bi)4128 static int dpp_nfc_update_bi_key(struct dpp_bootstrap_info *own_bi,
4129 struct dpp_bootstrap_info *peer_bi)
4130 {
4131 if (peer_bi->curve == own_bi->curve)
4132 return 0;
4133
4134 wpa_printf(MSG_DEBUG,
4135 "DPP: Update own bootstrapping key to match peer curve from NFC handover");
4136
4137 EVP_PKEY_free(own_bi->pubkey);
4138 own_bi->pubkey = NULL;
4139
4140 if (dpp_keygen(own_bi, peer_bi->curve->name, NULL, 0) < 0 ||
4141 dpp_gen_uri(own_bi) < 0)
4142 goto fail;
4143
4144 return 0;
4145 fail:
4146 dl_list_del(&own_bi->list);
4147 dpp_bootstrap_info_free(own_bi);
4148 return -1;
4149 }
4150
4151
dpp_nfc_update_bi(struct dpp_bootstrap_info * own_bi,struct dpp_bootstrap_info * peer_bi)4152 int dpp_nfc_update_bi(struct dpp_bootstrap_info *own_bi,
4153 struct dpp_bootstrap_info *peer_bi)
4154 {
4155 if (dpp_nfc_update_bi_channel(own_bi, peer_bi) < 0 ||
4156 dpp_nfc_update_bi_key(own_bi, peer_bi) < 0)
4157 return -1;
4158 return 0;
4159 }
4160
4161
dpp_next_configurator_id(struct dpp_global * dpp)4162 static unsigned int dpp_next_configurator_id(struct dpp_global *dpp)
4163 {
4164 struct dpp_configurator *conf;
4165 unsigned int max_id = 0;
4166
4167 dl_list_for_each(conf, &dpp->configurator, struct dpp_configurator,
4168 list) {
4169 if (conf->id > max_id)
4170 max_id = conf->id;
4171 }
4172 return max_id + 1;
4173 }
4174
4175
dpp_configurator_add(struct dpp_global * dpp,const char * cmd)4176 int dpp_configurator_add(struct dpp_global *dpp, const char *cmd)
4177 {
4178 char *curve = NULL;
4179 char *key = NULL, *ppkey = NULL;
4180 u8 *privkey = NULL, *pp_key = NULL;
4181 size_t privkey_len = 0, pp_key_len = 0;
4182 int ret = -1;
4183 struct dpp_configurator *conf = NULL;
4184
4185 curve = get_param(cmd, " curve=");
4186 key = get_param(cmd, " key=");
4187 ppkey = get_param(cmd, " ppkey=");
4188
4189 if (key) {
4190 privkey_len = os_strlen(key) / 2;
4191 privkey = os_malloc(privkey_len);
4192 if (!privkey ||
4193 hexstr2bin(key, privkey, privkey_len) < 0)
4194 goto fail;
4195 }
4196
4197 if (ppkey) {
4198 pp_key_len = os_strlen(ppkey) / 2;
4199 pp_key = os_malloc(pp_key_len);
4200 if (!pp_key ||
4201 hexstr2bin(ppkey, pp_key, pp_key_len) < 0)
4202 goto fail;
4203 }
4204
4205 conf = dpp_keygen_configurator(curve, privkey, privkey_len,
4206 pp_key, pp_key_len);
4207 if (!conf)
4208 goto fail;
4209
4210 conf->id = dpp_next_configurator_id(dpp);
4211 dl_list_add(&dpp->configurator, &conf->list);
4212 ret = conf->id;
4213 conf = NULL;
4214 fail:
4215 os_free(curve);
4216 str_clear_free(key);
4217 str_clear_free(ppkey);
4218 bin_clear_free(privkey, privkey_len);
4219 bin_clear_free(pp_key, pp_key_len);
4220 dpp_configurator_free(conf);
4221 return ret;
4222 }
4223
4224
dpp_configurator_del(struct dpp_global * dpp,unsigned int id)4225 static int dpp_configurator_del(struct dpp_global *dpp, unsigned int id)
4226 {
4227 struct dpp_configurator *conf, *tmp;
4228 int found = 0;
4229
4230 if (!dpp)
4231 return -1;
4232
4233 dl_list_for_each_safe(conf, tmp, &dpp->configurator,
4234 struct dpp_configurator, list) {
4235 if (id && conf->id != id)
4236 continue;
4237 found = 1;
4238 dl_list_del(&conf->list);
4239 dpp_configurator_free(conf);
4240 }
4241
4242 if (id == 0)
4243 return 0; /* flush succeeds regardless of entries found */
4244 return found ? 0 : -1;
4245 }
4246
4247
dpp_configurator_remove(struct dpp_global * dpp,const char * id)4248 int dpp_configurator_remove(struct dpp_global *dpp, const char *id)
4249 {
4250 unsigned int id_val;
4251
4252 if (os_strcmp(id, "*") == 0) {
4253 id_val = 0;
4254 } else {
4255 id_val = atoi(id);
4256 if (id_val == 0)
4257 return -1;
4258 }
4259
4260 return dpp_configurator_del(dpp, id_val);
4261 }
4262
4263
dpp_configurator_get_key_id(struct dpp_global * dpp,unsigned int id,char * buf,size_t buflen)4264 int dpp_configurator_get_key_id(struct dpp_global *dpp, unsigned int id,
4265 char *buf, size_t buflen)
4266 {
4267 struct dpp_configurator *conf;
4268
4269 conf = dpp_configurator_get_id(dpp, id);
4270 if (!conf)
4271 return -1;
4272
4273 return dpp_configurator_get_key(conf, buf, buflen);
4274 }
4275
4276
4277 #ifdef CONFIG_DPP2
4278
dpp_configurator_from_backup(struct dpp_global * dpp,struct dpp_asymmetric_key * key)4279 int dpp_configurator_from_backup(struct dpp_global *dpp,
4280 struct dpp_asymmetric_key *key)
4281 {
4282 struct dpp_configurator *conf;
4283 const EC_KEY *eckey, *eckey_pp;
4284 const EC_GROUP *group, *group_pp;
4285 int nid;
4286 const struct dpp_curve_params *curve;
4287
4288 if (!key->csign || !key->pp_key)
4289 return -1;
4290 eckey = EVP_PKEY_get0_EC_KEY(key->csign);
4291 if (!eckey)
4292 return -1;
4293 group = EC_KEY_get0_group(eckey);
4294 if (!group)
4295 return -1;
4296 nid = EC_GROUP_get_curve_name(group);
4297 curve = dpp_get_curve_nid(nid);
4298 if (!curve) {
4299 wpa_printf(MSG_INFO, "DPP: Unsupported group in c-sign-key");
4300 return -1;
4301 }
4302 eckey_pp = EVP_PKEY_get0_EC_KEY(key->pp_key);
4303 if (!eckey_pp)
4304 return -1;
4305 group_pp = EC_KEY_get0_group(eckey_pp);
4306 if (!group_pp)
4307 return -1;
4308 if (EC_GROUP_get_curve_name(group) !=
4309 EC_GROUP_get_curve_name(group_pp)) {
4310 wpa_printf(MSG_INFO,
4311 "DPP: Mismatch in c-sign-key and ppKey groups");
4312 return -1;
4313 }
4314
4315 conf = os_zalloc(sizeof(*conf));
4316 if (!conf)
4317 return -1;
4318 conf->curve = curve;
4319 conf->csign = key->csign;
4320 key->csign = NULL;
4321 conf->pp_key = key->pp_key;
4322 key->pp_key = NULL;
4323 conf->own = 1;
4324 if (dpp_configurator_gen_kid(conf) < 0) {
4325 dpp_configurator_free(conf);
4326 return -1;
4327 }
4328
4329 conf->id = dpp_next_configurator_id(dpp);
4330 dl_list_add(&dpp->configurator, &conf->list);
4331 return conf->id;
4332 }
4333
4334
dpp_configurator_find_kid(struct dpp_global * dpp,const u8 * kid)4335 struct dpp_configurator * dpp_configurator_find_kid(struct dpp_global *dpp,
4336 const u8 *kid)
4337 {
4338 struct dpp_configurator *conf;
4339
4340 if (!dpp)
4341 return NULL;
4342
4343 dl_list_for_each(conf, &dpp->configurator,
4344 struct dpp_configurator, list) {
4345 if (os_memcmp(conf->kid_hash, kid, SHA256_MAC_LEN) == 0)
4346 return conf;
4347 }
4348 return NULL;
4349 }
4350
4351 #endif /* CONFIG_DPP2 */
4352
4353
dpp_global_init(struct dpp_global_config * config)4354 struct dpp_global * dpp_global_init(struct dpp_global_config *config)
4355 {
4356 struct dpp_global *dpp;
4357
4358 dpp = os_zalloc(sizeof(*dpp));
4359 if (!dpp)
4360 return NULL;
4361 #ifdef CONFIG_DPP2
4362 dpp->cb_ctx = config->cb_ctx;
4363 dpp->remove_bi = config->remove_bi;
4364 #endif /* CONFIG_DPP2 */
4365
4366 dl_list_init(&dpp->bootstrap);
4367 dl_list_init(&dpp->configurator);
4368 #ifdef CONFIG_DPP2
4369 dl_list_init(&dpp->controllers);
4370 dl_list_init(&dpp->tcp_init);
4371 #endif /* CONFIG_DPP2 */
4372
4373 return dpp;
4374 }
4375
4376
dpp_global_clear(struct dpp_global * dpp)4377 void dpp_global_clear(struct dpp_global *dpp)
4378 {
4379 if (!dpp)
4380 return;
4381
4382 dpp_bootstrap_del(dpp, 0);
4383 dpp_configurator_del(dpp, 0);
4384 #ifdef CONFIG_DPP2
4385 dpp_tcp_init_flush(dpp);
4386 dpp_relay_flush_controllers(dpp);
4387 dpp_controller_stop(dpp);
4388 #endif /* CONFIG_DPP2 */
4389 }
4390
4391
dpp_global_deinit(struct dpp_global * dpp)4392 void dpp_global_deinit(struct dpp_global *dpp)
4393 {
4394 dpp_global_clear(dpp);
4395 os_free(dpp);
4396 }
4397
4398
4399 #ifdef CONFIG_DPP2
4400
dpp_build_presence_announcement(struct dpp_bootstrap_info * bi)4401 struct wpabuf * dpp_build_presence_announcement(struct dpp_bootstrap_info *bi)
4402 {
4403 struct wpabuf *msg;
4404
4405 wpa_printf(MSG_DEBUG, "DPP: Build Presence Announcement frame");
4406
4407 msg = dpp_alloc_msg(DPP_PA_PRESENCE_ANNOUNCEMENT, 4 + SHA256_MAC_LEN);
4408 if (!msg)
4409 return NULL;
4410
4411 /* Responder Bootstrapping Key Hash */
4412 dpp_build_attr_r_bootstrap_key_hash(msg, bi->pubkey_hash_chirp);
4413 wpa_hexdump_buf(MSG_DEBUG,
4414 "DPP: Presence Announcement frame attributes", msg);
4415 return msg;
4416 }
4417
4418
dpp_notify_chirp_received(void * msg_ctx,int id,const u8 * src,unsigned int freq,const u8 * hash)4419 void dpp_notify_chirp_received(void *msg_ctx, int id, const u8 *src,
4420 unsigned int freq, const u8 *hash)
4421 {
4422 char hex[SHA256_MAC_LEN * 2 + 1];
4423
4424 wpa_snprintf_hex(hex, sizeof(hex), hash, SHA256_MAC_LEN);
4425 wpa_msg(msg_ctx, MSG_INFO,
4426 DPP_EVENT_CHIRP_RX "id=%d src=" MACSTR " freq=%u hash=%s",
4427 id, MAC2STR(src), freq, hex);
4428 }
4429
4430 #endif /* CONFIG_DPP2 */
4431