]> git.ipfire.org Git - thirdparty/hostap.git/blob - src/ap/wpa_auth_ft.c
projects / thirdparty / hostap.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
FT: Support 256-bit IGTK in AP case
[thirdparty/hostap.git] / src / ap / wpa_auth_ft.c
1 /*
2 * hostapd - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2004-2018, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "utils/list.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/ieee802_11_common.h"
16 #include "crypto/aes.h"
17 #include "crypto/aes_siv.h"
18 #include "crypto/aes_wrap.h"
19 #include "crypto/sha384.h"
20 #include "crypto/random.h"
21 #include "ap_config.h"
22 #include "ieee802_11.h"
23 #include "wmm.h"
24 #include "wpa_auth.h"
25 #include "wpa_auth_i.h"
26
27
28 #ifdef CONFIG_IEEE80211R_AP
29
30 const unsigned int ftRRBseqTimeout = 10;
31 const unsigned int ftRRBmaxQueueLen = 100;
32
33
34 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
35 const u8 *current_ap, const u8 *sta_addr,
36 u16 status, const u8 *resp_ies,
37 size_t resp_ies_len);
38 static void ft_finish_pull(struct wpa_state_machine *sm);
39 static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx);
40 static void wpa_ft_rrb_seq_timeout(void *eloop_ctx, void *timeout_ctx);
41
42 struct tlv_list {
43 u16 type;
44 size_t len;
45 const u8 *data;
46 };
47
48
49 /**
50 * wpa_ft_rrb_decrypt - Decrypt FT RRB message
51 * @key: AES-SIV key for AEAD
52 * @key_len: Length of key in octets
53 * @enc: Pointer to encrypted TLVs
54 * @enc_len: Length of encrypted TLVs in octets
55 * @auth: Pointer to authenticated TLVs
56 * @auth_len: Length of authenticated TLVs in octets
57 * @src_addr: MAC address of the frame sender
58 * @type: Vendor-specific subtype of the RRB frame (FT_PACKET_*)
59 * @plain: Pointer to return the pointer to the allocated plaintext buffer;
60 * needs to be freed by the caller if not NULL;
61 * will only be returned on success
62 * @plain_len: Pointer to return the length of the allocated plaintext buffer
63 * in octets
64 * Returns: 0 on success, -1 on error
65 */
66 static int wpa_ft_rrb_decrypt(const u8 *key, const size_t key_len,
67 const u8 *enc, const size_t enc_len,
68 const u8 *auth, const size_t auth_len,
69 const u8 *src_addr, u8 type,
70 u8 **plain, size_t *plain_size)
71 {
72 const u8 *ad[3] = { src_addr, auth, &type };
73 size_t ad_len[3] = { ETH_ALEN, auth_len, sizeof(type) };
74
75 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): decrypt using key", key, key_len);
76
77 if (!key) { /* skip decryption */
78 *plain = os_memdup(enc, enc_len);
79 if (enc_len > 0 && !*plain)
80 goto err;
81
82 *plain_size = enc_len;
83
84 return 0;
85 }
86
87 *plain = NULL;
88
89 /* SIV overhead */
90 if (enc_len < AES_BLOCK_SIZE)
91 goto err;
92
93 *plain = os_zalloc(enc_len - AES_BLOCK_SIZE);
94 if (!*plain)
95 goto err;
96
97 if (aes_siv_decrypt(key, key_len, enc, enc_len, 3, ad, ad_len,
98 *plain) < 0)
99 goto err;
100
101 *plain_size = enc_len - AES_BLOCK_SIZE;
102 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): decrypted TLVs",
103 *plain, *plain_size);
104 return 0;
105 err:
106 os_free(*plain);
107 *plain = NULL;
108 *plain_size = 0;
109
110 wpa_printf(MSG_ERROR, "FT(RRB): Failed to decrypt");
111
112 return -1;
113 }
114
115
116 /* get first tlv record in packet matching type
117 * @data (decrypted) packet
118 * @return 0 on success else -1
119 */
120 static int wpa_ft_rrb_get_tlv(const u8 *plain, size_t plain_len,
121 u16 type, size_t *tlv_len, const u8 **tlv_data)
122 {
123 const struct ft_rrb_tlv *f;
124 size_t left;
125 le16 type16;
126 size_t len;
127
128 left = plain_len;
129 type16 = host_to_le16(type);
130
131 while (left >= sizeof(*f)) {
132 f = (const struct ft_rrb_tlv *) plain;
133
134 left -= sizeof(*f);
135 plain += sizeof(*f);
136 len = le_to_host16(f->len);
137
138 if (left < len) {
139 wpa_printf(MSG_DEBUG, "FT: RRB message truncated");
140 break;
141 }
142
143 if (f->type == type16) {
144 *tlv_len = len;
145 *tlv_data = plain;
146 return 0;
147 }
148
149 left -= len;
150 plain += len;
151 }
152
153 return -1;
154 }
155
156
157 static void wpa_ft_rrb_dump(const u8 *plain, const size_t plain_len)
158 {
159 const struct ft_rrb_tlv *f;
160 size_t left;
161 size_t len;
162
163 left = plain_len;
164
165 wpa_printf(MSG_DEBUG, "FT: RRB dump message");
166 while (left >= sizeof(*f)) {
167 f = (const struct ft_rrb_tlv *) plain;
168
169 left -= sizeof(*f);
170 plain += sizeof(*f);
171 len = le_to_host16(f->len);
172
173 wpa_printf(MSG_DEBUG, "FT: RRB TLV type = %d, len = %zu",
174 le_to_host16(f->type), len);
175
176 if (left < len) {
177 wpa_printf(MSG_DEBUG,
178 "FT: RRB message truncated: left %zu bytes, need %zu",
179 left, len);
180 break;
181 }
182
183 wpa_hexdump(MSG_DEBUG, "FT: RRB TLV data", plain, len);
184
185 left -= len;
186 plain += len;
187 }
188
189 if (left > 0)
190 wpa_hexdump(MSG_DEBUG, "FT: RRB TLV padding", plain, left);
191
192 wpa_printf(MSG_DEBUG, "FT: RRB dump message end");
193 }
194
195
196 static int cmp_int(const void *a, const void *b)
197 {
198 int x, y;
199
200 x = *((int *) a);
201 y = *((int *) b);
202 return x - y;
203 }
204
205
206 static int wpa_ft_rrb_get_tlv_vlan(const u8 *plain, const size_t plain_len,
207 struct vlan_description *vlan)
208 {
209 struct ft_rrb_tlv *f;
210 size_t left;
211 size_t len;
212 int taggedidx;
213 int vlan_id;
214 int type;
215
216 left = plain_len;
217 taggedidx = 0;
218 os_memset(vlan, 0, sizeof(*vlan));
219
220 while (left >= sizeof(*f)) {
221 f = (struct ft_rrb_tlv *) plain;
222
223 left -= sizeof(*f);
224 plain += sizeof(*f);
225
226 len = le_to_host16(f->len);
227 type = le_to_host16(f->type);
228
229 if (left < len) {
230 wpa_printf(MSG_DEBUG, "FT: RRB message truncated");
231 return -1;
232 }
233
234 if (type != FT_RRB_VLAN_UNTAGGED && type != FT_RRB_VLAN_TAGGED)
235 goto skip;
236
237 if (type == FT_RRB_VLAN_UNTAGGED && len != sizeof(le16)) {
238 wpa_printf(MSG_DEBUG,
239 "FT: RRB VLAN_UNTAGGED invalid length");
240 return -1;
241 }
242
243 if (type == FT_RRB_VLAN_TAGGED && len % sizeof(le16) != 0) {
244 wpa_printf(MSG_DEBUG,
245 "FT: RRB VLAN_TAGGED invalid length");
246 return -1;
247 }
248
249 while (len >= sizeof(le16)) {
250 vlan_id = WPA_GET_LE16(plain);
251 plain += sizeof(le16);
252 left -= sizeof(le16);
253 len -= sizeof(le16);
254
255 if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID) {
256 wpa_printf(MSG_DEBUG,
257 "FT: RRB VLAN ID invalid %d",
258 vlan_id);
259 continue;
260 }
261
262 if (type == FT_RRB_VLAN_UNTAGGED)
263 vlan->untagged = vlan_id;
264
265 if (type == FT_RRB_VLAN_TAGGED &&
266 taggedidx < MAX_NUM_TAGGED_VLAN) {
267 vlan->tagged[taggedidx] = vlan_id;
268 taggedidx++;
269 } else if (type == FT_RRB_VLAN_TAGGED) {
270 wpa_printf(MSG_DEBUG, "FT: RRB too many VLANs");
271 }
272 }
273
274 skip:
275 left -= len;
276 plain += len;
277 }
278
279 if (taggedidx)
280 qsort(vlan->tagged, taggedidx, sizeof(int), cmp_int);
281
282 vlan->notempty = vlan->untagged || vlan->tagged[0];
283
284 return 0;
285 }
286
287
288 static size_t wpa_ft_tlv_len(const struct tlv_list *tlvs)
289 {
290 size_t tlv_len = 0;
291 int i;
292
293 if (!tlvs)
294 return 0;
295
296 for (i = 0; tlvs[i].type != FT_RRB_LAST_EMPTY; i++) {
297 tlv_len += sizeof(struct ft_rrb_tlv);
298 tlv_len += tlvs[i].len;
299 }
300
301 return tlv_len;
302 }
303
304
305 static size_t wpa_ft_tlv_lin(const struct tlv_list *tlvs, u8 *start,
306 u8 *endpos)
307 {
308 int i;
309 size_t tlv_len;
310 struct ft_rrb_tlv *hdr;
311 u8 *pos;
312
313 if (!tlvs)
314 return 0;
315
316 tlv_len = 0;
317 pos = start;
318 for (i = 0; tlvs[i].type != FT_RRB_LAST_EMPTY; i++) {
319 if (tlv_len + sizeof(*hdr) > (size_t) (endpos - start))
320 return tlv_len;
321 tlv_len += sizeof(*hdr);
322 hdr = (struct ft_rrb_tlv *) pos;
323 hdr->type = host_to_le16(tlvs[i].type);
324 hdr->len = host_to_le16(tlvs[i].len);
325 pos = start + tlv_len;
326
327 if (tlv_len + tlvs[i].len > (size_t) (endpos - start))
328 return tlv_len;
329 if (tlvs[i].len == 0)
330 continue;
331 tlv_len += tlvs[i].len;
332 os_memcpy(pos, tlvs[i].data, tlvs[i].len);
333 pos = start + tlv_len;
334 }
335
336 return tlv_len;
337 }
338
339
340 static size_t wpa_ft_vlan_len(const struct vlan_description *vlan)
341 {
342 size_t tlv_len = 0;
343 int i;
344
345 if (!vlan || !vlan->notempty)
346 return 0;
347
348 if (vlan->untagged) {
349 tlv_len += sizeof(struct ft_rrb_tlv);
350 tlv_len += sizeof(le16);
351 }
352 if (vlan->tagged[0])
353 tlv_len += sizeof(struct ft_rrb_tlv);
354 for (i = 0; i < MAX_NUM_TAGGED_VLAN && vlan->tagged[i]; i++)
355 tlv_len += sizeof(le16);
356
357 return tlv_len;
358 }
359
360
361 static size_t wpa_ft_vlan_lin(const struct vlan_description *vlan,
362 u8 *start, u8 *endpos)
363 {
364 size_t tlv_len;
365 int i, len;
366 struct ft_rrb_tlv *hdr;
367 u8 *pos = start;
368
369 if (!vlan || !vlan->notempty)
370 return 0;
371
372 tlv_len = 0;
373 if (vlan->untagged) {
374 tlv_len += sizeof(*hdr);
375 if (start + tlv_len > endpos)
376 return tlv_len;
377 hdr = (struct ft_rrb_tlv *) pos;
378 hdr->type = host_to_le16(FT_RRB_VLAN_UNTAGGED);
379 hdr->len = host_to_le16(sizeof(le16));
380 pos = start + tlv_len;
381
382 tlv_len += sizeof(le16);
383 if (start + tlv_len > endpos)
384 return tlv_len;
385 WPA_PUT_LE16(pos, vlan->untagged);
386 pos = start + tlv_len;
387 }
388
389 if (!vlan->tagged[0])
390 return tlv_len;
391
392 tlv_len += sizeof(*hdr);
393 if (start + tlv_len > endpos)
394 return tlv_len;
395 hdr = (struct ft_rrb_tlv *) pos;
396 hdr->type = host_to_le16(FT_RRB_VLAN_TAGGED);
397 len = 0; /* len is computed below */
398 pos = start + tlv_len;
399
400 for (i = 0; i < MAX_NUM_TAGGED_VLAN && vlan->tagged[i]; i++) {
401 tlv_len += sizeof(le16);
402 if (start + tlv_len > endpos)
403 break;
404 len += sizeof(le16);
405 WPA_PUT_LE16(pos, vlan->tagged[i]);
406 pos = start + tlv_len;
407 }
408
409 hdr->len = host_to_le16(len);
410
411 return tlv_len;
412 }
413
414
415 static int wpa_ft_rrb_lin(const struct tlv_list *tlvs1,
416 const struct tlv_list *tlvs2,
417 const struct vlan_description *vlan,
418 u8 **plain, size_t *plain_len)
419 {
420 u8 *pos, *endpos;
421 size_t tlv_len;
422
423 tlv_len = wpa_ft_tlv_len(tlvs1);
424 tlv_len += wpa_ft_tlv_len(tlvs2);
425 tlv_len += wpa_ft_vlan_len(vlan);
426
427 *plain_len = tlv_len;
428 *plain = os_zalloc(tlv_len);
429 if (!*plain) {
430 wpa_printf(MSG_ERROR, "FT: Failed to allocate plaintext");
431 goto err;
432 }
433
434 pos = *plain;
435 endpos = *plain + tlv_len;
436 pos += wpa_ft_tlv_lin(tlvs1, pos, endpos);
437 pos += wpa_ft_tlv_lin(tlvs2, pos, endpos);
438 pos += wpa_ft_vlan_lin(vlan, pos, endpos);
439
440 /* sanity check */
441 if (pos != endpos) {
442 wpa_printf(MSG_ERROR, "FT: Length error building RRB");
443 goto err;
444 }
445
446 return 0;
447
448 err:
449 os_free(*plain);
450 *plain = NULL;
451 *plain_len = 0;
452 return -1;
453 }
454
455
456 static int wpa_ft_rrb_encrypt(const u8 *key, const size_t key_len,
457 const u8 *plain, const size_t plain_len,
458 const u8 *auth, const size_t auth_len,
459 const u8 *src_addr, u8 type, u8 *enc)
460 {
461 const u8 *ad[3] = { src_addr, auth, &type };
462 size_t ad_len[3] = { ETH_ALEN, auth_len, sizeof(type) };
463
464 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): plaintext message",
465 plain, plain_len);
466 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): encrypt using key", key, key_len);
467
468 if (!key) {
469 /* encryption not needed, return plaintext as packet */
470 os_memcpy(enc, plain, plain_len);
471 } else if (aes_siv_encrypt(key, key_len, plain, plain_len,
472 3, ad, ad_len, enc) < 0) {
473 wpa_printf(MSG_ERROR, "FT: Failed to encrypt RRB-OUI message");
474 return -1;
475 }
476
477 return 0;
478 }
479
480
481 /**
482 * wpa_ft_rrb_build - Build and encrypt an FT RRB message
483 * @key: AES-SIV key for AEAD
484 * @key_len: Length of key in octets
485 * @tlvs_enc0: First set of to-be-encrypted TLVs
486 * @tlvs_enc1: Second set of to-be-encrypted TLVs
487 * @tlvs_auth: Set of to-be-authenticated TLVs
488 * @src_addr: MAC address of the frame sender
489 * @type: Vendor-specific subtype of the RRB frame (FT_PACKET_*)
490 * @packet Pointer to return the pointer to the allocated packet buffer;
491 * needs to be freed by the caller if not null;
492 * will only be returned on success
493 * @packet_len: Pointer to return the length of the allocated buffer in octets
494 * Returns: 0 on success, -1 on error
495 */
496 static int wpa_ft_rrb_build(const u8 *key, const size_t key_len,
497 const struct tlv_list *tlvs_enc0,
498 const struct tlv_list *tlvs_enc1,
499 const struct tlv_list *tlvs_auth,
500 const struct vlan_description *vlan,
501 const u8 *src_addr, u8 type,
502 u8 **packet, size_t *packet_len)
503 {
504 u8 *plain = NULL, *auth = NULL, *pos;
505 size_t plain_len = 0, auth_len = 0;
506 int ret = -1;
507
508 *packet = NULL;
509 if (wpa_ft_rrb_lin(tlvs_enc0, tlvs_enc1, vlan, &plain, &plain_len) < 0)
510 goto out;
511
512 if (wpa_ft_rrb_lin(tlvs_auth, NULL, NULL, &auth, &auth_len) < 0)
513 goto out;
514
515 *packet_len = sizeof(u16) + auth_len + plain_len;
516 if (key)
517 *packet_len += AES_BLOCK_SIZE;
518 *packet = os_zalloc(*packet_len);
519 if (!*packet)
520 goto out;
521
522 pos = *packet;
523 WPA_PUT_LE16(pos, auth_len);
524 pos += 2;
525 os_memcpy(pos, auth, auth_len);
526 pos += auth_len;
527 if (wpa_ft_rrb_encrypt(key, key_len, plain, plain_len, auth,
528 auth_len, src_addr, type, pos) < 0)
529 goto out;
530
531 ret = 0;
532
533 out:
534 bin_clear_free(plain, plain_len);
535 os_free(auth);
536
537 if (ret) {
538 wpa_printf(MSG_ERROR, "FT: Failed to build RRB-OUI message");
539 os_free(*packet);
540 *packet = NULL;
541 *packet_len = 0;
542 }
543
544 return ret;
545 }
546
547
548 #define RRB_GET_SRC(srcfield, type, field, txt, checklength) do { \
549 if (wpa_ft_rrb_get_tlv(srcfield, srcfield##_len, type, \
550 &f_##field##_len, &f_##field) < 0 || \
551 (checklength > 0 && ((size_t) checklength) != f_##field##_len)) { \
552 wpa_printf(MSG_INFO, "FT: Missing required " #field \
553 " in %s from " MACSTR, txt, MAC2STR(src_addr)); \
554 wpa_ft_rrb_dump(srcfield, srcfield##_len); \
555 goto out; \
556 } \
557 } while (0)
558
559 #define RRB_GET(type, field, txt, checklength) \
560 RRB_GET_SRC(plain, type, field, txt, checklength)
561 #define RRB_GET_AUTH(type, field, txt, checklength) \
562 RRB_GET_SRC(auth, type, field, txt, checklength)
563
564 #define RRB_GET_OPTIONAL_SRC(srcfield, type, field, txt, checklength) do { \
565 if (wpa_ft_rrb_get_tlv(srcfield, srcfield##_len, type, \
566 &f_##field##_len, &f_##field) < 0 || \
567 (checklength > 0 && ((size_t) checklength) != f_##field##_len)) { \
568 wpa_printf(MSG_DEBUG, "FT: Missing optional " #field \
569 " in %s from " MACSTR, txt, MAC2STR(src_addr)); \
570 f_##field##_len = 0; \
571 f_##field = NULL; \
572 } \
573 } while (0)
574
575 #define RRB_GET_OPTIONAL(type, field, txt, checklength) \
576 RRB_GET_OPTIONAL_SRC(plain, type, field, txt, checklength)
577 #define RRB_GET_OPTIONAL_AUTH(type, field, txt, checklength) \
578 RRB_GET_OPTIONAL_SRC(auth, type, field, txt, checklength)
579
580 static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
581 const u8 *data, size_t data_len)
582 {
583 if (wpa_auth->cb->send_ether == NULL)
584 return -1;
585 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
586 return wpa_auth->cb->send_ether(wpa_auth->cb_ctx, dst, ETH_P_RRB,
587 data, data_len);
588 }
589
590
591 static int wpa_ft_rrb_oui_send(struct wpa_authenticator *wpa_auth,
592 const u8 *dst, u8 oui_suffix,
593 const u8 *data, size_t data_len)
594 {
595 if (!wpa_auth->cb->send_oui)
596 return -1;
597 wpa_printf(MSG_DEBUG, "FT: RRB-OUI type %u send to " MACSTR,
598 oui_suffix, MAC2STR(dst));
599 return wpa_auth->cb->send_oui(wpa_auth->cb_ctx, dst, oui_suffix, data,
600 data_len);
601 }
602
603
604 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
605 const u8 *dst, const u8 *data, size_t data_len)
606 {
607 if (wpa_auth->cb->send_ft_action == NULL)
608 return -1;
609 return wpa_auth->cb->send_ft_action(wpa_auth->cb_ctx, dst,
610 data, data_len);
611 }
612
613
614 static const u8 * wpa_ft_get_psk(struct wpa_authenticator *wpa_auth,
615 const u8 *addr, const u8 *p2p_dev_addr,
616 const u8 *prev_psk)
617 {
618 if (wpa_auth->cb->get_psk == NULL)
619 return NULL;
620 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
621 prev_psk, NULL);
622 }
623
624
625 static struct wpa_state_machine *
626 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
627 {
628 if (wpa_auth->cb->add_sta == NULL)
629 return NULL;
630 return wpa_auth->cb->add_sta(wpa_auth->cb_ctx, sta_addr);
631 }
632
633
634 static int wpa_ft_set_vlan(struct wpa_authenticator *wpa_auth,
635 const u8 *sta_addr, struct vlan_description *vlan)
636 {
637 if (!wpa_auth->cb->set_vlan)
638 return -1;
639 return wpa_auth->cb->set_vlan(wpa_auth->cb_ctx, sta_addr, vlan);
640 }
641
642
643 static int wpa_ft_get_vlan(struct wpa_authenticator *wpa_auth,
644 const u8 *sta_addr, struct vlan_description *vlan)
645 {
646 if (!wpa_auth->cb->get_vlan)
647 return -1;
648 return wpa_auth->cb->get_vlan(wpa_auth->cb_ctx, sta_addr, vlan);
649 }
650
651
652 static int
653 wpa_ft_set_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
654 const u8 *identity, size_t identity_len)
655 {
656 if (!wpa_auth->cb->set_identity)
657 return -1;
658 return wpa_auth->cb->set_identity(wpa_auth->cb_ctx, sta_addr, identity,
659 identity_len);
660 }
661
662
663 static size_t
664 wpa_ft_get_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
665 const u8 **buf)
666 {
667 *buf = NULL;
668 if (!wpa_auth->cb->get_identity)
669 return 0;
670 return wpa_auth->cb->get_identity(wpa_auth->cb_ctx, sta_addr, buf);
671 }
672
673
674 static int
675 wpa_ft_set_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
676 const u8 *radius_cui, size_t radius_cui_len)
677 {
678 if (!wpa_auth->cb->set_radius_cui)
679 return -1;
680 return wpa_auth->cb->set_radius_cui(wpa_auth->cb_ctx, sta_addr,
681 radius_cui, radius_cui_len);
682 }
683
684
685 static size_t
686 wpa_ft_get_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
687 const u8 **buf)
688 {
689 *buf = NULL;
690 if (!wpa_auth->cb->get_radius_cui)
691 return 0;
692 return wpa_auth->cb->get_radius_cui(wpa_auth->cb_ctx, sta_addr, buf);
693 }
694
695
696 static void
697 wpa_ft_set_session_timeout(struct wpa_authenticator *wpa_auth,
698 const u8 *sta_addr, int session_timeout)
699 {
700 if (!wpa_auth->cb->set_session_timeout)
701 return;
702 wpa_auth->cb->set_session_timeout(wpa_auth->cb_ctx, sta_addr,
703 session_timeout);
704 }
705
706
707 static int
708 wpa_ft_get_session_timeout(struct wpa_authenticator *wpa_auth,
709 const u8 *sta_addr)
710 {
711 if (!wpa_auth->cb->get_session_timeout)
712 return 0;
713 return wpa_auth->cb->get_session_timeout(wpa_auth->cb_ctx, sta_addr);
714 }
715
716
717 static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
718 const u8 *sta_addr,
719 u8 *tspec_ie, size_t tspec_ielen)
720 {
721 if (wpa_auth->cb->add_tspec == NULL) {
722 wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized");
723 return -1;
724 }
725 return wpa_auth->cb->add_tspec(wpa_auth->cb_ctx, sta_addr, tspec_ie,
726 tspec_ielen);
727 }
728
729
730 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
731 {
732 u8 *pos = buf;
733 u8 capab;
734 if (len < 2 + sizeof(struct rsn_mdie))
735 return -1;
736
737 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
738 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
739 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
740 pos += MOBILITY_DOMAIN_ID_LEN;
741 capab = 0;
742 if (conf->ft_over_ds)
743 capab |= RSN_FT_CAPAB_FT_OVER_DS;
744 *pos++ = capab;
745
746 return pos - buf;
747 }
748
749
750 int wpa_write_ftie(struct wpa_auth_config *conf, int use_sha384,
751 const u8 *r0kh_id, size_t r0kh_id_len,
752 const u8 *anonce, const u8 *snonce,
753 u8 *buf, size_t len, const u8 *subelem,
754 size_t subelem_len)
755 {
756 u8 *pos = buf, *ielen;
757 size_t hdrlen = use_sha384 ? sizeof(struct rsn_ftie_sha384) :
758 sizeof(struct rsn_ftie);
759
760 if (len < 2 + hdrlen + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
761 subelem_len)
762 return -1;
763
764 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
765 ielen = pos++;
766
767 if (use_sha384) {
768 struct rsn_ftie_sha384 *hdr = (struct rsn_ftie_sha384 *) pos;
769
770 os_memset(hdr, 0, sizeof(*hdr));
771 pos += sizeof(*hdr);
772 WPA_PUT_LE16(hdr->mic_control, 0);
773 if (anonce)
774 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
775 if (snonce)
776 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
777 } else {
778 struct rsn_ftie *hdr = (struct rsn_ftie *) pos;
779
780 os_memset(hdr, 0, sizeof(*hdr));
781 pos += sizeof(*hdr);
782 WPA_PUT_LE16(hdr->mic_control, 0);
783 if (anonce)
784 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
785 if (snonce)
786 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
787 }
788
789 /* Optional Parameters */
790 *pos++ = FTIE_SUBELEM_R1KH_ID;
791 *pos++ = FT_R1KH_ID_LEN;
792 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
793 pos += FT_R1KH_ID_LEN;
794
795 if (r0kh_id) {
796 *pos++ = FTIE_SUBELEM_R0KH_ID;
797 *pos++ = r0kh_id_len;
798 os_memcpy(pos, r0kh_id, r0kh_id_len);
799 pos += r0kh_id_len;
800 }
801
802 if (subelem) {
803 os_memcpy(pos, subelem, subelem_len);
804 pos += subelem_len;
805 }
806
807 *ielen = pos - buf - 2;
808
809 return pos - buf;
810 }
811
812
813 /* A packet to be handled after seq response */
814 struct ft_remote_item {
815 struct dl_list list;
816
817 u8 nonce[FT_RRB_NONCE_LEN];
818 struct os_reltime nonce_ts;
819
820 u8 src_addr[ETH_ALEN];
821 u8 *enc;
822 size_t enc_len;
823 u8 *auth;
824 size_t auth_len;
825 int (*cb)(struct wpa_authenticator *wpa_auth,
826 const u8 *src_addr,
827 const u8 *enc, size_t enc_len,
828 const u8 *auth, size_t auth_len,
829 int no_defer);
830 };
831
832
833 static void wpa_ft_rrb_seq_free(struct ft_remote_item *item)
834 {
835 eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, ELOOP_ALL_CTX, item);
836 dl_list_del(&item->list);
837 bin_clear_free(item->enc, item->enc_len);
838 os_free(item->auth);
839 os_free(item);
840 }
841
842
843 static void wpa_ft_rrb_seq_flush(struct wpa_authenticator *wpa_auth,
844 struct ft_remote_seq *rkh_seq, int cb)
845 {
846 struct ft_remote_item *item, *n;
847
848 dl_list_for_each_safe(item, n, &rkh_seq->rx.queue,
849 struct ft_remote_item, list) {
850 if (cb && item->cb)
851 item->cb(wpa_auth, item->src_addr, item->enc,
852 item->enc_len, item->auth, item->auth_len, 1);
853 wpa_ft_rrb_seq_free(item);
854 }
855 }
856
857
858 static void wpa_ft_rrb_seq_timeout(void *eloop_ctx, void *timeout_ctx)
859 {
860 struct ft_remote_item *item = timeout_ctx;
861
862 wpa_ft_rrb_seq_free(item);
863 }
864
865
866 static int
867 wpa_ft_rrb_seq_req(struct wpa_authenticator *wpa_auth,
868 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
869 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
870 const u8 *f_r1kh_id, const u8 *key, size_t key_len,
871 const u8 *enc, size_t enc_len,
872 const u8 *auth, size_t auth_len,
873 int (*cb)(struct wpa_authenticator *wpa_auth,
874 const u8 *src_addr,
875 const u8 *enc, size_t enc_len,
876 const u8 *auth, size_t auth_len,
877 int no_defer))
878 {
879 struct ft_remote_item *item = NULL;
880 u8 *packet = NULL;
881 size_t packet_len;
882 struct tlv_list seq_req_auth[] = {
883 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
884 .data = NULL /* to be filled: item->nonce */ },
885 { .type = FT_RRB_R0KH_ID, .len = f_r0kh_id_len,
886 .data = f_r0kh_id },
887 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
888 .data = f_r1kh_id },
889 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
890 };
891
892 if (dl_list_len(&rkh_seq->rx.queue) >= ftRRBmaxQueueLen) {
893 wpa_printf(MSG_DEBUG, "FT: Sequence number queue too long");
894 goto err;
895 }
896
897 item = os_zalloc(sizeof(*item));
898 if (!item)
899 goto err;
900
901 os_memcpy(item->src_addr, src_addr, ETH_ALEN);
902 item->cb = cb;
903
904 if (random_get_bytes(item->nonce, FT_RRB_NONCE_LEN) < 0) {
905 wpa_printf(MSG_DEBUG, "FT: Seq num nonce: out of random bytes");
906 goto err;
907 }
908
909 if (os_get_reltime(&item->nonce_ts) < 0)
910 goto err;
911
912 if (enc && enc_len > 0) {
913 item->enc = os_memdup(enc, enc_len);
914 item->enc_len = enc_len;
915 if (!item->enc)
916 goto err;
917 }
918
919 if (auth && auth_len > 0) {
920 item->auth = os_memdup(auth, auth_len);
921 item->auth_len = auth_len;
922 if (!item->auth)
923 goto err;
924 }
925
926 eloop_register_timeout(ftRRBseqTimeout, 0, wpa_ft_rrb_seq_timeout,
927 wpa_auth, item);
928
929 seq_req_auth[0].data = item->nonce;
930
931 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_req_auth, NULL,
932 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
933 &packet, &packet_len) < 0) {
934 item = NULL; /* some other seq resp might still accept this */
935 goto err;
936 }
937
938 dl_list_add(&rkh_seq->rx.queue, &item->list);
939
940 wpa_ft_rrb_oui_send(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
941 packet, packet_len);
942
943 os_free(packet);
944
945 return 0;
946 err:
947 wpa_printf(MSG_DEBUG, "FT: Failed to send sequence number request");
948 if (item) {
949 os_free(item->auth);
950 bin_clear_free(item->enc, item->enc_len);
951 os_free(item);
952 }
953
954 return -1;
955 }
956
957
958 #define FT_RRB_SEQ_OK 0
959 #define FT_RRB_SEQ_DROP 1
960 #define FT_RRB_SEQ_DEFER 2
961
962 static int
963 wpa_ft_rrb_seq_chk(struct ft_remote_seq *rkh_seq, const u8 *src_addr,
964 const u8 *enc, size_t enc_len,
965 const u8 *auth, size_t auth_len,
966 const char *msgtype, int no_defer)
967 {
968 const u8 *f_seq;
969 size_t f_seq_len;
970 const struct ft_rrb_seq *msg_both;
971 u32 msg_seq, msg_off, rkh_off;
972 struct os_reltime now;
973 unsigned int i;
974
975 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
976 wpa_hexdump(MSG_DEBUG, "FT: sequence number", f_seq, f_seq_len);
977 msg_both = (const struct ft_rrb_seq *) f_seq;
978
979 if (rkh_seq->rx.num_last == 0) {
980 /* first packet from remote */
981 goto defer;
982 }
983
984 if (le_to_host32(msg_both->dom) != rkh_seq->rx.dom) {
985 /* remote might have rebooted */
986 goto defer;
987 }
988
989 if (os_get_reltime(&now) == 0) {
990 u32 msg_ts_now_remote, msg_ts_off;
991 struct os_reltime now_remote;
992
993 os_reltime_sub(&now, &rkh_seq->rx.time_offset, &now_remote);
994 msg_ts_now_remote = now_remote.sec;
995 msg_ts_off = le_to_host32(msg_both->ts) -
996 (msg_ts_now_remote - ftRRBseqTimeout);
997 if (msg_ts_off > 2 * ftRRBseqTimeout)
998 goto defer;
999 }
1000
1001 msg_seq = le_to_host32(msg_both->seq);
1002 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1003 msg_off = msg_seq - rkh_off;
1004 if (msg_off > 0xC0000000)
1005 goto out; /* too old message, drop it */
1006
1007 if (msg_off <= 0x40000000) {
1008 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1009 if (rkh_seq->rx.last[i] == msg_seq)
1010 goto out; /* duplicate message, drop it */
1011 }
1012
1013 return FT_RRB_SEQ_OK;
1014 }
1015
1016 defer:
1017 if (no_defer)
1018 goto out;
1019
1020 wpa_printf(MSG_DEBUG, "FT: Possibly invalid sequence number in %s from "
1021 MACSTR, msgtype, MAC2STR(src_addr));
1022
1023 return FT_RRB_SEQ_DEFER;
1024 out:
1025 wpa_printf(MSG_DEBUG, "FT: Invalid sequence number in %s from " MACSTR,
1026 msgtype, MAC2STR(src_addr));
1027
1028 return FT_RRB_SEQ_DROP;
1029 }
1030
1031
1032 static void
1033 wpa_ft_rrb_seq_accept(struct wpa_authenticator *wpa_auth,
1034 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1035 const u8 *auth, size_t auth_len,
1036 const char *msgtype)
1037 {
1038 const u8 *f_seq;
1039 size_t f_seq_len;
1040 const struct ft_rrb_seq *msg_both;
1041 u32 msg_seq, msg_off, min_off, rkh_off;
1042 int minidx = 0;
1043 unsigned int i;
1044
1045 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1046 msg_both = (const struct ft_rrb_seq *) f_seq;
1047
1048 msg_seq = le_to_host32(msg_both->seq);
1049
1050 if (rkh_seq->rx.num_last < FT_REMOTE_SEQ_BACKLOG) {
1051 rkh_seq->rx.last[rkh_seq->rx.num_last] = msg_seq;
1052 rkh_seq->rx.num_last++;
1053 return;
1054 }
1055
1056 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1057 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1058 msg_off = rkh_seq->rx.last[i] - rkh_off;
1059 min_off = rkh_seq->rx.last[minidx] - rkh_off;
1060 if (msg_off < min_off && i != rkh_seq->rx.offsetidx)
1061 minidx = i;
1062 }
1063 rkh_seq->rx.last[rkh_seq->rx.offsetidx] = msg_seq;
1064 rkh_seq->rx.offsetidx = minidx;
1065
1066 return;
1067 out:
1068 /* RRB_GET_AUTH should never fail here as
1069 * wpa_ft_rrb_seq_chk() verified FT_RRB_SEQ presence. */
1070 wpa_printf(MSG_ERROR, "FT: %s() failed", __func__);
1071 }
1072
1073
1074 static int wpa_ft_new_seq(struct ft_remote_seq *rkh_seq,
1075 struct ft_rrb_seq *f_seq)
1076 {
1077 struct os_reltime now;
1078
1079 if (os_get_reltime(&now) < 0)
1080 return -1;
1081
1082 if (!rkh_seq->tx.dom) {
1083 if (random_get_bytes((u8 *) &rkh_seq->tx.seq,
1084 sizeof(rkh_seq->tx.seq))) {
1085 wpa_printf(MSG_ERROR,
1086 "FT: Failed to get random data for sequence number initialization");
1087 rkh_seq->tx.seq = now.usec;
1088 }
1089 if (random_get_bytes((u8 *) &rkh_seq->tx.dom,
1090 sizeof(rkh_seq->tx.dom))) {
1091 wpa_printf(MSG_ERROR,
1092 "FT: Failed to get random data for sequence number initialization");
1093 rkh_seq->tx.dom = now.usec;
1094 }
1095 rkh_seq->tx.dom |= 1;
1096 }
1097
1098 f_seq->dom = host_to_le32(rkh_seq->tx.dom);
1099 f_seq->seq = host_to_le32(rkh_seq->tx.seq);
1100 f_seq->ts = host_to_le32(now.sec);
1101
1102 rkh_seq->tx.seq++;
1103
1104 return 0;
1105 }
1106
1107
1108 struct wpa_ft_pmk_r0_sa {
1109 struct dl_list list;
1110 u8 pmk_r0[PMK_LEN_MAX];
1111 size_t pmk_r0_len;
1112 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
1113 u8 spa[ETH_ALEN];
1114 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1115 struct vlan_description *vlan;
1116 os_time_t expiration; /* 0 for no expiration */
1117 u8 *identity;
1118 size_t identity_len;
1119 u8 *radius_cui;
1120 size_t radius_cui_len;
1121 os_time_t session_timeout; /* 0 for no expiration */
1122 /* TODO: radius_class, EAP type */
1123 int pmk_r1_pushed;
1124 };
1125
1126 struct wpa_ft_pmk_r1_sa {
1127 struct dl_list list;
1128 u8 pmk_r1[PMK_LEN_MAX];
1129 size_t pmk_r1_len;
1130 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
1131 u8 spa[ETH_ALEN];
1132 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1133 struct vlan_description *vlan;
1134 u8 *identity;
1135 size_t identity_len;
1136 u8 *radius_cui;
1137 size_t radius_cui_len;
1138 os_time_t session_timeout; /* 0 for no expiration */
1139 /* TODO: radius_class, EAP type */
1140 };
1141
1142 struct wpa_ft_pmk_cache {
1143 struct dl_list pmk_r0; /* struct wpa_ft_pmk_r0_sa */
1144 struct dl_list pmk_r1; /* struct wpa_ft_pmk_r1_sa */
1145 };
1146
1147
1148 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx);
1149 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx);
1150
1151
1152 static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0)
1153 {
1154 if (!r0)
1155 return;
1156
1157 dl_list_del(&r0->list);
1158 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1159
1160 os_memset(r0->pmk_r0, 0, PMK_LEN_MAX);
1161 os_free(r0->vlan);
1162 os_free(r0->identity);
1163 os_free(r0->radius_cui);
1164 os_free(r0);
1165 }
1166
1167
1168 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx)
1169 {
1170 struct wpa_ft_pmk_r0_sa *r0 = eloop_ctx;
1171 struct os_reltime now;
1172 int expires_in;
1173 int session_timeout;
1174
1175 os_get_reltime(&now);
1176
1177 if (!r0)
1178 return;
1179
1180 expires_in = r0->expiration - now.sec;
1181 session_timeout = r0->session_timeout - now.sec;
1182 /* conditions to remove from cache:
1183 * a) r0->expiration is set and hit
1184 * -or-
1185 * b) r0->session_timeout is set and hit
1186 */
1187 if ((!r0->expiration || expires_in > 0) &&
1188 (!r0->session_timeout || session_timeout > 0)) {
1189 wpa_printf(MSG_ERROR,
1190 "FT: %s() called for non-expired entry %p",
1191 __func__, r0);
1192 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1193 if (r0->expiration && expires_in > 0)
1194 eloop_register_timeout(expires_in + 1, 0,
1195 wpa_ft_expire_pmk_r0, r0, NULL);
1196 if (r0->session_timeout && session_timeout > 0)
1197 eloop_register_timeout(session_timeout + 1, 0,
1198 wpa_ft_expire_pmk_r0, r0, NULL);
1199 return;
1200 }
1201
1202 wpa_ft_free_pmk_r0(r0);
1203 }
1204
1205
1206 static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1)
1207 {
1208 if (!r1)
1209 return;
1210
1211 dl_list_del(&r1->list);
1212 eloop_cancel_timeout(wpa_ft_expire_pmk_r1, r1, NULL);
1213
1214 os_memset(r1->pmk_r1, 0, PMK_LEN_MAX);
1215 os_free(r1->vlan);
1216 os_free(r1->identity);
1217 os_free(r1->radius_cui);
1218 os_free(r1);
1219 }
1220
1221
1222 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx)
1223 {
1224 struct wpa_ft_pmk_r1_sa *r1 = eloop_ctx;
1225
1226 wpa_ft_free_pmk_r1(r1);
1227 }
1228
1229
1230 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
1231 {
1232 struct wpa_ft_pmk_cache *cache;
1233
1234 cache = os_zalloc(sizeof(*cache));
1235 if (cache) {
1236 dl_list_init(&cache->pmk_r0);
1237 dl_list_init(&cache->pmk_r1);
1238 }
1239
1240 return cache;
1241 }
1242
1243
1244 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
1245 {
1246 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
1247 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
1248
1249 dl_list_for_each_safe(r0, r0prev, &cache->pmk_r0,
1250 struct wpa_ft_pmk_r0_sa, list)
1251 wpa_ft_free_pmk_r0(r0);
1252
1253 dl_list_for_each_safe(r1, r1prev, &cache->pmk_r1,
1254 struct wpa_ft_pmk_r1_sa, list)
1255 wpa_ft_free_pmk_r1(r1);
1256
1257 os_free(cache);
1258 }
1259
1260
1261 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
1262 const u8 *spa, const u8 *pmk_r0,
1263 size_t pmk_r0_len,
1264 const u8 *pmk_r0_name, int pairwise,
1265 const struct vlan_description *vlan,
1266 int expires_in, int session_timeout,
1267 const u8 *identity, size_t identity_len,
1268 const u8 *radius_cui, size_t radius_cui_len)
1269 {
1270 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1271 struct wpa_ft_pmk_r0_sa *r0;
1272 struct os_reltime now;
1273
1274 /* TODO: add limit on number of entries in cache */
1275 os_get_reltime(&now);
1276
1277 r0 = os_zalloc(sizeof(*r0));
1278 if (r0 == NULL)
1279 return -1;
1280
1281 os_memcpy(r0->pmk_r0, pmk_r0, pmk_r0_len);
1282 r0->pmk_r0_len = pmk_r0_len;
1283 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
1284 os_memcpy(r0->spa, spa, ETH_ALEN);
1285 r0->pairwise = pairwise;
1286 if (expires_in > 0)
1287 r0->expiration = now.sec + expires_in;
1288 if (vlan && vlan->notempty) {
1289 r0->vlan = os_zalloc(sizeof(*vlan));
1290 if (!r0->vlan) {
1291 bin_clear_free(r0, sizeof(*r0));
1292 return -1;
1293 }
1294 *r0->vlan = *vlan;
1295 }
1296 if (identity) {
1297 r0->identity = os_malloc(identity_len);
1298 if (r0->identity) {
1299 os_memcpy(r0->identity, identity, identity_len);
1300 r0->identity_len = identity_len;
1301 }
1302 }
1303 if (radius_cui) {
1304 r0->radius_cui = os_malloc(radius_cui_len);
1305 if (r0->radius_cui) {
1306 os_memcpy(r0->radius_cui, radius_cui, radius_cui_len);
1307 r0->radius_cui_len = radius_cui_len;
1308 }
1309 }
1310 if (session_timeout > 0)
1311 r0->session_timeout = now.sec + session_timeout;
1312
1313 dl_list_add(&cache->pmk_r0, &r0->list);
1314 if (expires_in > 0)
1315 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r0,
1316 r0, NULL);
1317 if (session_timeout > 0)
1318 eloop_register_timeout(session_timeout + 1, 0,
1319 wpa_ft_expire_pmk_r0, r0, NULL);
1320
1321 return 0;
1322 }
1323
1324
1325 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
1326 const u8 *spa, const u8 *pmk_r0_name,
1327 const struct wpa_ft_pmk_r0_sa **r0_out)
1328 {
1329 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1330 struct wpa_ft_pmk_r0_sa *r0;
1331 struct os_reltime now;
1332
1333 os_get_reltime(&now);
1334 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
1335 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
1336 os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
1337 WPA_PMK_NAME_LEN) == 0) {
1338 *r0_out = r0;
1339 return 0;
1340 }
1341 }
1342
1343 *r0_out = NULL;
1344 return -1;
1345 }
1346
1347
1348 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
1349 const u8 *spa, const u8 *pmk_r1,
1350 size_t pmk_r1_len,
1351 const u8 *pmk_r1_name, int pairwise,
1352 const struct vlan_description *vlan,
1353 int expires_in, int session_timeout,
1354 const u8 *identity, size_t identity_len,
1355 const u8 *radius_cui, size_t radius_cui_len)
1356 {
1357 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1358 int max_expires_in = wpa_auth->conf.r1_max_key_lifetime;
1359 struct wpa_ft_pmk_r1_sa *r1;
1360 struct os_reltime now;
1361
1362 /* TODO: limit on number of entries in cache */
1363 os_get_reltime(&now);
1364
1365 if (max_expires_in && (max_expires_in < expires_in || expires_in == 0))
1366 expires_in = max_expires_in;
1367
1368 r1 = os_zalloc(sizeof(*r1));
1369 if (r1 == NULL)
1370 return -1;
1371
1372 os_memcpy(r1->pmk_r1, pmk_r1, pmk_r1_len);
1373 r1->pmk_r1_len = pmk_r1_len;
1374 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
1375 os_memcpy(r1->spa, spa, ETH_ALEN);
1376 r1->pairwise = pairwise;
1377 if (vlan && vlan->notempty) {
1378 r1->vlan = os_zalloc(sizeof(*vlan));
1379 if (!r1->vlan) {
1380 bin_clear_free(r1, sizeof(*r1));
1381 return -1;
1382 }
1383 *r1->vlan = *vlan;
1384 }
1385 if (identity) {
1386 r1->identity = os_malloc(identity_len);
1387 if (r1->identity) {
1388 os_memcpy(r1->identity, identity, identity_len);
1389 r1->identity_len = identity_len;
1390 }
1391 }
1392 if (radius_cui) {
1393 r1->radius_cui = os_malloc(radius_cui_len);
1394 if (r1->radius_cui) {
1395 os_memcpy(r1->radius_cui, radius_cui, radius_cui_len);
1396 r1->radius_cui_len = radius_cui_len;
1397 }
1398 }
1399 if (session_timeout > 0)
1400 r1->session_timeout = now.sec + session_timeout;
1401
1402 dl_list_add(&cache->pmk_r1, &r1->list);
1403
1404 if (expires_in > 0)
1405 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r1,
1406 r1, NULL);
1407 if (session_timeout > 0)
1408 eloop_register_timeout(session_timeout + 1, 0,
1409 wpa_ft_expire_pmk_r1, r1, NULL);
1410
1411 return 0;
1412 }
1413
1414
1415 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
1416 const u8 *spa, const u8 *pmk_r1_name,
1417 u8 *pmk_r1, size_t *pmk_r1_len, int *pairwise,
1418 struct vlan_description *vlan,
1419 const u8 **identity, size_t *identity_len,
1420 const u8 **radius_cui, size_t *radius_cui_len,
1421 int *session_timeout)
1422 {
1423 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1424 struct wpa_ft_pmk_r1_sa *r1;
1425 struct os_reltime now;
1426
1427 os_get_reltime(&now);
1428
1429 dl_list_for_each(r1, &cache->pmk_r1, struct wpa_ft_pmk_r1_sa, list) {
1430 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
1431 os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
1432 WPA_PMK_NAME_LEN) == 0) {
1433 os_memcpy(pmk_r1, r1->pmk_r1, r1->pmk_r1_len);
1434 *pmk_r1_len = r1->pmk_r1_len;
1435 if (pairwise)
1436 *pairwise = r1->pairwise;
1437 if (vlan && r1->vlan)
1438 *vlan = *r1->vlan;
1439 if (vlan && !r1->vlan)
1440 os_memset(vlan, 0, sizeof(*vlan));
1441 if (identity && identity_len) {
1442 *identity = r1->identity;
1443 *identity_len = r1->identity_len;
1444 }
1445 if (radius_cui && radius_cui_len) {
1446 *radius_cui = r1->radius_cui;
1447 *radius_cui_len = r1->radius_cui_len;
1448 }
1449 if (session_timeout && r1->session_timeout > now.sec)
1450 *session_timeout = r1->session_timeout -
1451 now.sec;
1452 else if (session_timeout && r1->session_timeout)
1453 *session_timeout = 1;
1454 else
1455 *session_timeout = 0;
1456 return 0;
1457 }
1458 }
1459
1460 return -1;
1461 }
1462
1463
1464 static int wpa_ft_rrb_init_r0kh_seq(struct ft_remote_r0kh *r0kh)
1465 {
1466 if (r0kh->seq)
1467 return 0;
1468
1469 r0kh->seq = os_zalloc(sizeof(*r0kh->seq));
1470 if (!r0kh->seq) {
1471 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r0kh->seq");
1472 return -1;
1473 }
1474
1475 dl_list_init(&r0kh->seq->rx.queue);
1476
1477 return 0;
1478 }
1479
1480
1481 static void wpa_ft_rrb_lookup_r0kh(struct wpa_authenticator *wpa_auth,
1482 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
1483 struct ft_remote_r0kh **r0kh_out,
1484 struct ft_remote_r0kh **r0kh_wildcard)
1485 {
1486 struct ft_remote_r0kh *r0kh;
1487
1488 *r0kh_wildcard = NULL;
1489 *r0kh_out = NULL;
1490
1491 if (wpa_auth->conf.r0kh_list)
1492 r0kh = *wpa_auth->conf.r0kh_list;
1493 else
1494 r0kh = NULL;
1495 for (; r0kh; r0kh = r0kh->next) {
1496 if (r0kh->id_len == 1 && r0kh->id[0] == '*')
1497 *r0kh_wildcard = r0kh;
1498 if (f_r0kh_id && r0kh->id_len == f_r0kh_id_len &&
1499 os_memcmp_const(f_r0kh_id, r0kh->id, f_r0kh_id_len) == 0)
1500 *r0kh_out = r0kh;
1501 }
1502
1503 if (!*r0kh_out && !*r0kh_wildcard)
1504 wpa_printf(MSG_DEBUG, "FT: No matching R0KH found");
1505
1506 if (*r0kh_out && wpa_ft_rrb_init_r0kh_seq(*r0kh_out) < 0)
1507 *r0kh_out = NULL;
1508 }
1509
1510
1511 static int wpa_ft_rrb_init_r1kh_seq(struct ft_remote_r1kh *r1kh)
1512 {
1513 if (r1kh->seq)
1514 return 0;
1515
1516 r1kh->seq = os_zalloc(sizeof(*r1kh->seq));
1517 if (!r1kh->seq) {
1518 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r1kh->seq");
1519 return -1;
1520 }
1521
1522 dl_list_init(&r1kh->seq->rx.queue);
1523
1524 return 0;
1525 }
1526
1527
1528 static void wpa_ft_rrb_lookup_r1kh(struct wpa_authenticator *wpa_auth,
1529 const u8 *f_r1kh_id,
1530 struct ft_remote_r1kh **r1kh_out,
1531 struct ft_remote_r1kh **r1kh_wildcard)
1532 {
1533 struct ft_remote_r1kh *r1kh;
1534
1535 *r1kh_wildcard = NULL;
1536 *r1kh_out = NULL;
1537
1538 if (wpa_auth->conf.r1kh_list)
1539 r1kh = *wpa_auth->conf.r1kh_list;
1540 else
1541 r1kh = NULL;
1542 for (; r1kh; r1kh = r1kh->next) {
1543 if (is_zero_ether_addr(r1kh->addr) &&
1544 is_zero_ether_addr(r1kh->id))
1545 *r1kh_wildcard = r1kh;
1546 if (f_r1kh_id &&
1547 os_memcmp_const(r1kh->id, f_r1kh_id, FT_R1KH_ID_LEN) == 0)
1548 *r1kh_out = r1kh;
1549 }
1550
1551 if (!*r1kh_out && !*r1kh_wildcard)
1552 wpa_printf(MSG_DEBUG, "FT: No matching R1KH found");
1553
1554 if (*r1kh_out && wpa_ft_rrb_init_r1kh_seq(*r1kh_out) < 0)
1555 *r1kh_out = NULL;
1556 }
1557
1558
1559 static int wpa_ft_rrb_check_r0kh(struct wpa_authenticator *wpa_auth,
1560 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1561 {
1562 if (f_r0kh_id_len != wpa_auth->conf.r0_key_holder_len ||
1563 os_memcmp_const(f_r0kh_id, wpa_auth->conf.r0_key_holder,
1564 f_r0kh_id_len) != 0)
1565 return -1;
1566
1567 return 0;
1568 }
1569
1570
1571 static int wpa_ft_rrb_check_r1kh(struct wpa_authenticator *wpa_auth,
1572 const u8 *f_r1kh_id)
1573 {
1574 if (os_memcmp_const(f_r1kh_id, wpa_auth->conf.r1_key_holder,
1575 FT_R1KH_ID_LEN) != 0)
1576 return -1;
1577
1578 return 0;
1579 }
1580
1581
1582 static void wpa_ft_rrb_del_r0kh(void *eloop_ctx, void *timeout_ctx)
1583 {
1584 struct wpa_authenticator *wpa_auth = eloop_ctx;
1585 struct ft_remote_r0kh *r0kh, *prev = NULL;
1586
1587 if (!wpa_auth->conf.r0kh_list)
1588 return;
1589
1590 for (r0kh = *wpa_auth->conf.r0kh_list; r0kh; r0kh = r0kh->next) {
1591 if (r0kh == timeout_ctx)
1592 break;
1593 prev = r0kh;
1594 }
1595 if (!r0kh)
1596 return;
1597 if (prev)
1598 prev->next = r0kh->next;
1599 else
1600 *wpa_auth->conf.r0kh_list = r0kh->next;
1601 if (r0kh->seq)
1602 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1603 os_free(r0kh->seq);
1604 os_free(r0kh);
1605 }
1606
1607
1608 static void wpa_ft_rrb_r0kh_replenish(struct wpa_authenticator *wpa_auth,
1609 struct ft_remote_r0kh *r0kh, int timeout)
1610 {
1611 if (timeout > 0)
1612 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1613 wpa_auth, r0kh);
1614 }
1615
1616
1617 static void wpa_ft_rrb_r0kh_timeout(struct wpa_authenticator *wpa_auth,
1618 struct ft_remote_r0kh *r0kh, int timeout)
1619 {
1620 eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth, r0kh);
1621
1622 if (timeout > 0)
1623 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1624 wpa_auth, r0kh);
1625 }
1626
1627
1628 static struct ft_remote_r0kh *
1629 wpa_ft_rrb_add_r0kh(struct wpa_authenticator *wpa_auth,
1630 struct ft_remote_r0kh *r0kh_wildcard,
1631 const u8 *src_addr, const u8 *r0kh_id, size_t id_len,
1632 int timeout)
1633 {
1634 struct ft_remote_r0kh *r0kh;
1635
1636 if (!wpa_auth->conf.r0kh_list)
1637 return NULL;
1638
1639 r0kh = os_zalloc(sizeof(*r0kh));
1640 if (!r0kh)
1641 return NULL;
1642
1643 if (src_addr)
1644 os_memcpy(r0kh->addr, src_addr, sizeof(r0kh->addr));
1645
1646 if (id_len > FT_R0KH_ID_MAX_LEN)
1647 id_len = FT_R0KH_ID_MAX_LEN;
1648 os_memcpy(r0kh->id, r0kh_id, id_len);
1649 r0kh->id_len = id_len;
1650
1651 os_memcpy(r0kh->key, r0kh_wildcard->key, sizeof(r0kh->key));
1652
1653 r0kh->next = *wpa_auth->conf.r0kh_list;
1654 *wpa_auth->conf.r0kh_list = r0kh;
1655
1656 if (timeout > 0)
1657 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1658 wpa_auth, r0kh);
1659
1660 if (wpa_ft_rrb_init_r0kh_seq(r0kh) < 0)
1661 return NULL;
1662
1663 return r0kh;
1664 }
1665
1666
1667 static void wpa_ft_rrb_del_r1kh(void *eloop_ctx, void *timeout_ctx)
1668 {
1669 struct wpa_authenticator *wpa_auth = eloop_ctx;
1670 struct ft_remote_r1kh *r1kh, *prev = NULL;
1671
1672 if (!wpa_auth->conf.r1kh_list)
1673 return;
1674
1675 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
1676 if (r1kh == timeout_ctx)
1677 break;
1678 prev = r1kh;
1679 }
1680 if (!r1kh)
1681 return;
1682 if (prev)
1683 prev->next = r1kh->next;
1684 else
1685 *wpa_auth->conf.r1kh_list = r1kh->next;
1686 if (r1kh->seq)
1687 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1688 os_free(r1kh->seq);
1689 os_free(r1kh);
1690 }
1691
1692
1693 static void wpa_ft_rrb_r1kh_replenish(struct wpa_authenticator *wpa_auth,
1694 struct ft_remote_r1kh *r1kh, int timeout)
1695 {
1696 if (timeout > 0)
1697 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1698 wpa_auth, r1kh);
1699 }
1700
1701
1702 static struct ft_remote_r1kh *
1703 wpa_ft_rrb_add_r1kh(struct wpa_authenticator *wpa_auth,
1704 struct ft_remote_r1kh *r1kh_wildcard,
1705 const u8 *src_addr, const u8 *r1kh_id, int timeout)
1706 {
1707 struct ft_remote_r1kh *r1kh;
1708
1709 if (!wpa_auth->conf.r1kh_list)
1710 return NULL;
1711
1712 r1kh = os_zalloc(sizeof(*r1kh));
1713 if (!r1kh)
1714 return NULL;
1715
1716 os_memcpy(r1kh->addr, src_addr, sizeof(r1kh->addr));
1717 os_memcpy(r1kh->id, r1kh_id, sizeof(r1kh->id));
1718 os_memcpy(r1kh->key, r1kh_wildcard->key, sizeof(r1kh->key));
1719 r1kh->next = *wpa_auth->conf.r1kh_list;
1720 *wpa_auth->conf.r1kh_list = r1kh;
1721
1722 if (timeout > 0)
1723 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1724 wpa_auth, r1kh);
1725
1726 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
1727 return NULL;
1728
1729 return r1kh;
1730 }
1731
1732
1733 void wpa_ft_sta_deinit(struct wpa_state_machine *sm)
1734 {
1735 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1736 }
1737
1738
1739 static void wpa_ft_deinit_seq(struct wpa_authenticator *wpa_auth)
1740 {
1741 struct ft_remote_r0kh *r0kh;
1742 struct ft_remote_r1kh *r1kh;
1743
1744 eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, wpa_auth, ELOOP_ALL_CTX);
1745
1746 if (wpa_auth->conf.r0kh_list)
1747 r0kh = *wpa_auth->conf.r0kh_list;
1748 else
1749 r0kh = NULL;
1750 for (; r0kh; r0kh = r0kh->next) {
1751 if (!r0kh->seq)
1752 continue;
1753 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1754 os_free(r0kh->seq);
1755 r0kh->seq = NULL;
1756 }
1757
1758 if (wpa_auth->conf.r1kh_list)
1759 r1kh = *wpa_auth->conf.r1kh_list;
1760 else
1761 r1kh = NULL;
1762 for (; r1kh; r1kh = r1kh->next) {
1763 if (!r1kh->seq)
1764 continue;
1765 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1766 os_free(r1kh->seq);
1767 r1kh->seq = NULL;
1768 }
1769 }
1770
1771
1772 static void wpa_ft_deinit_rkh_tmp(struct wpa_authenticator *wpa_auth)
1773 {
1774 struct ft_remote_r0kh *r0kh, *r0kh_next, *r0kh_prev = NULL;
1775 struct ft_remote_r1kh *r1kh, *r1kh_next, *r1kh_prev = NULL;
1776
1777 if (wpa_auth->conf.r0kh_list)
1778 r0kh = *wpa_auth->conf.r0kh_list;
1779 else
1780 r0kh = NULL;
1781 while (r0kh) {
1782 r0kh_next = r0kh->next;
1783 if (eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth,
1784 r0kh) > 0) {
1785 if (r0kh_prev)
1786 r0kh_prev->next = r0kh_next;
1787 else
1788 *wpa_auth->conf.r0kh_list = r0kh_next;
1789 os_free(r0kh);
1790 } else {
1791 r0kh_prev = r0kh;
1792 }
1793 r0kh = r0kh_next;
1794 }
1795
1796 if (wpa_auth->conf.r1kh_list)
1797 r1kh = *wpa_auth->conf.r1kh_list;
1798 else
1799 r1kh = NULL;
1800 while (r1kh) {
1801 r1kh_next = r1kh->next;
1802 if (eloop_cancel_timeout(wpa_ft_rrb_del_r1kh, wpa_auth,
1803 r1kh) > 0) {
1804 if (r1kh_prev)
1805 r1kh_prev->next = r1kh_next;
1806 else
1807 *wpa_auth->conf.r1kh_list = r1kh_next;
1808 os_free(r1kh);
1809 } else {
1810 r1kh_prev = r1kh;
1811 }
1812 r1kh = r1kh_next;
1813 }
1814 }
1815
1816
1817 void wpa_ft_deinit(struct wpa_authenticator *wpa_auth)
1818 {
1819 wpa_ft_deinit_seq(wpa_auth);
1820 wpa_ft_deinit_rkh_tmp(wpa_auth);
1821 }
1822
1823
1824 static void wpa_ft_block_r0kh(struct wpa_authenticator *wpa_auth,
1825 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1826 {
1827 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1828
1829 if (!wpa_auth->conf.rkh_neg_timeout)
1830 return;
1831
1832 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
1833 &r0kh, &r0kh_wildcard);
1834
1835 if (!r0kh_wildcard) {
1836 /* r0kh removed after neg_timeout and might need re-adding */
1837 return;
1838 }
1839
1840 wpa_hexdump(MSG_DEBUG, "FT: Blacklist R0KH-ID",
1841 f_r0kh_id, f_r0kh_id_len);
1842
1843 if (r0kh) {
1844 wpa_ft_rrb_r0kh_timeout(wpa_auth, r0kh,
1845 wpa_auth->conf.rkh_neg_timeout);
1846 os_memset(r0kh->addr, 0, ETH_ALEN);
1847 } else
1848 wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, NULL, f_r0kh_id,
1849 f_r0kh_id_len,
1850 wpa_auth->conf.rkh_neg_timeout);
1851 }
1852
1853
1854 static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx)
1855 {
1856 struct wpa_state_machine *sm = eloop_ctx;
1857
1858 wpa_printf(MSG_DEBUG, "FT: Timeout pending pull request for " MACSTR,
1859 MAC2STR(sm->addr));
1860 if (sm->ft_pending_pull_left_retries <= 0)
1861 wpa_ft_block_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len);
1862
1863 /* cancel multiple timeouts */
1864 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1865 ft_finish_pull(sm);
1866 }
1867
1868
1869 static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
1870 const u8 *ies, size_t ies_len,
1871 const u8 *pmk_r0_name)
1872 {
1873 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1874 u8 *packet = NULL;
1875 const u8 *key, *f_r1kh_id = sm->wpa_auth->conf.r1_key_holder;
1876 size_t packet_len, key_len;
1877 struct ft_rrb_seq f_seq;
1878 int tsecs, tusecs, first;
1879 struct wpabuf *ft_pending_req_ies;
1880 int r0kh_timeout;
1881 struct tlv_list req_enc[] = {
1882 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
1883 .data = pmk_r0_name },
1884 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
1885 .data = sm->addr },
1886 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1887 };
1888 struct tlv_list req_auth[] = {
1889 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
1890 .data = sm->ft_pending_pull_nonce },
1891 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
1892 .data = (u8 *) &f_seq },
1893 { .type = FT_RRB_R0KH_ID, .len = sm->r0kh_id_len,
1894 .data = sm->r0kh_id },
1895 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
1896 .data = f_r1kh_id },
1897 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1898 };
1899
1900 if (sm->ft_pending_pull_left_retries <= 0)
1901 return -1;
1902 first = sm->ft_pending_pull_left_retries ==
1903 sm->wpa_auth->conf.rkh_pull_retries;
1904 sm->ft_pending_pull_left_retries--;
1905
1906 wpa_ft_rrb_lookup_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len,
1907 &r0kh, &r0kh_wildcard);
1908
1909 /* Keep r0kh sufficiently long in the list for seq num check */
1910 r0kh_timeout = sm->wpa_auth->conf.rkh_pull_timeout / 1000 +
1911 1 + ftRRBseqTimeout;
1912 if (r0kh) {
1913 wpa_ft_rrb_r0kh_replenish(sm->wpa_auth, r0kh, r0kh_timeout);
1914 } else if (r0kh_wildcard) {
1915 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
1916 /* r0kh->addr: updated by SEQ_RESP and wpa_ft_expire_pull */
1917 r0kh = wpa_ft_rrb_add_r0kh(sm->wpa_auth, r0kh_wildcard,
1918 r0kh_wildcard->addr,
1919 sm->r0kh_id, sm->r0kh_id_len,
1920 r0kh_timeout);
1921 }
1922 if (r0kh == NULL) {
1923 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
1924 sm->r0kh_id, sm->r0kh_id_len);
1925 return -1;
1926 }
1927 if (is_zero_ether_addr(r0kh->addr)) {
1928 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID is blacklisted",
1929 sm->r0kh_id, sm->r0kh_id_len);
1930 return -1;
1931 }
1932 if (os_memcmp(r0kh->addr, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1933 wpa_printf(MSG_DEBUG,
1934 "FT: R0KH-ID points to self - no matching key available");
1935 return -1;
1936 }
1937
1938 key = r0kh->key;
1939 key_len = sizeof(r0kh->key);
1940
1941 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
1942 "address " MACSTR, MAC2STR(r0kh->addr));
1943
1944 if (r0kh->seq->rx.num_last == 0) {
1945 /* A sequence request will be sent out anyway when pull
1946 * response is received. Send it out now to avoid one RTT. */
1947 wpa_ft_rrb_seq_req(sm->wpa_auth, r0kh->seq, r0kh->addr,
1948 r0kh->id, r0kh->id_len, f_r1kh_id, key,
1949 key_len, NULL, 0, NULL, 0, NULL);
1950 }
1951
1952 if (first &&
1953 random_get_bytes(sm->ft_pending_pull_nonce, FT_RRB_NONCE_LEN) < 0) {
1954 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
1955 "nonce");
1956 return -1;
1957 }
1958
1959 if (wpa_ft_new_seq(r0kh->seq, &f_seq) < 0) {
1960 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
1961 return -1;
1962 }
1963
1964 if (wpa_ft_rrb_build(key, key_len, req_enc, NULL, req_auth, NULL,
1965 sm->wpa_auth->addr, FT_PACKET_R0KH_R1KH_PULL,
1966 &packet, &packet_len) < 0)
1967 return -1;
1968
1969 ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
1970 wpabuf_free(sm->ft_pending_req_ies);
1971 sm->ft_pending_req_ies = ft_pending_req_ies;
1972 if (!sm->ft_pending_req_ies) {
1973 os_free(packet);
1974 return -1;
1975 }
1976
1977 tsecs = sm->wpa_auth->conf.rkh_pull_timeout / 1000;
1978 tusecs = (sm->wpa_auth->conf.rkh_pull_timeout % 1000) * 1000;
1979 eloop_register_timeout(tsecs, tusecs, wpa_ft_expire_pull, sm, NULL);
1980
1981 wpa_ft_rrb_oui_send(sm->wpa_auth, r0kh->addr, FT_PACKET_R0KH_R1KH_PULL,
1982 packet, packet_len);
1983
1984 os_free(packet);
1985
1986 return 0;
1987 }
1988
1989
1990 int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm,
1991 const u8 *pmk_r0, const u8 *pmk_r0_name)
1992 {
1993 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
1994 struct vlan_description vlan;
1995 const u8 *identity, *radius_cui;
1996 size_t identity_len, radius_cui_len;
1997 int session_timeout;
1998 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
1999 SHA384_MAC_LEN : PMK_LEN;
2000
2001 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2002 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2003 MAC2STR(sm->addr));
2004 return -1;
2005 }
2006
2007 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2008 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2009 &radius_cui);
2010 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2011
2012 return wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2013 pmk_r0_name, sm->pairwise, &vlan, expires_in,
2014 session_timeout, identity, identity_len,
2015 radius_cui, radius_cui_len);
2016 }
2017
2018
2019 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
2020 struct wpa_ptk *ptk)
2021 {
2022 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2023 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2024 SHA384_MAC_LEN : PMK_LEN;
2025 size_t pmk_r1_len = pmk_r0_len;
2026 u8 pmk_r1[PMK_LEN_MAX];
2027 u8 ptk_name[WPA_PMK_NAME_LEN];
2028 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
2029 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
2030 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
2031 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
2032 const u8 *ssid = sm->wpa_auth->conf.ssid;
2033 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
2034 int psk_local = sm->wpa_auth->conf.ft_psk_generate_local;
2035 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2036 struct vlan_description vlan;
2037 const u8 *identity, *radius_cui;
2038 size_t identity_len, radius_cui_len;
2039 int session_timeout;
2040
2041 if (sm->xxkey_len == 0) {
2042 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
2043 "derivation");
2044 return -1;
2045 }
2046
2047 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2048 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2049 MAC2STR(sm->addr));
2050 return -1;
2051 }
2052
2053 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2054 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2055 &radius_cui);
2056 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2057
2058 if (wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
2059 r0kh, r0kh_len, sm->addr,
2060 pmk_r0, pmk_r0_name,
2061 wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) < 0)
2062 return -1;
2063 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
2064 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
2065 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2066 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2067 pmk_r0_name,
2068 sm->pairwise, &vlan, expires_in,
2069 session_timeout, identity, identity_len,
2070 radius_cui, radius_cui_len);
2071
2072 if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_len, pmk_r0_name, r1kh, sm->addr,
2073 pmk_r1, sm->pmk_r1_name) < 0)
2074 return -1;
2075 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
2076 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
2077 WPA_PMK_NAME_LEN);
2078 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2079 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_len,
2080 sm->pmk_r1_name, sm->pairwise, &vlan,
2081 expires_in, session_timeout, identity,
2082 identity_len, radius_cui, radius_cui_len);
2083
2084 return wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
2085 sm->addr, sm->wpa_auth->addr, sm->pmk_r1_name,
2086 ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
2087 }
2088
2089
2090 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
2091 const u8 *addr, int idx, u8 *seq)
2092 {
2093 if (wpa_auth->cb->get_seqnum == NULL)
2094 return -1;
2095 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
2096 }
2097
2098
2099 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
2100 {
2101 u8 *subelem;
2102 struct wpa_group *gsm = sm->group;
2103 size_t subelem_len, pad_len;
2104 const u8 *key;
2105 size_t key_len;
2106 u8 keybuf[32];
2107 const u8 *kek;
2108 size_t kek_len;
2109
2110 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2111 kek = sm->PTK.kek2;
2112 kek_len = sm->PTK.kek2_len;
2113 } else {
2114 kek = sm->PTK.kek;
2115 kek_len = sm->PTK.kek_len;
2116 }
2117
2118 key_len = gsm->GTK_len;
2119 if (key_len > sizeof(keybuf))
2120 return NULL;
2121
2122 /*
2123 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
2124 * than 16 bytes.
2125 */
2126 pad_len = key_len % 8;
2127 if (pad_len)
2128 pad_len = 8 - pad_len;
2129 if (key_len + pad_len < 16)
2130 pad_len += 8;
2131 if (pad_len && key_len < sizeof(keybuf)) {
2132 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
2133 os_memset(keybuf + key_len, 0, pad_len);
2134 keybuf[key_len] = 0xdd;
2135 key_len += pad_len;
2136 key = keybuf;
2137 } else
2138 key = gsm->GTK[gsm->GN - 1];
2139
2140 /*
2141 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2142 * Key[5..32].
2143 */
2144 subelem_len = 13 + key_len + 8;
2145 subelem = os_zalloc(subelem_len);
2146 if (subelem == NULL)
2147 return NULL;
2148
2149 subelem[0] = FTIE_SUBELEM_GTK;
2150 subelem[1] = 11 + key_len + 8;
2151 /* Key ID in B0-B1 of Key Info */
2152 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
2153 subelem[4] = gsm->GTK_len;
2154 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
2155 if (aes_wrap(kek, kek_len, key_len / 8, key, subelem + 13)) {
2156 wpa_printf(MSG_DEBUG,
2157 "FT: GTK subelem encryption failed: kek_len=%d",
2158 (int) kek_len);
2159 os_free(subelem);
2160 return NULL;
2161 }
2162
2163 *len = subelem_len;
2164 return subelem;
2165 }
2166
2167
2168 #ifdef CONFIG_IEEE80211W
2169 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
2170 {
2171 u8 *subelem, *pos;
2172 struct wpa_group *gsm = sm->group;
2173 size_t subelem_len;
2174 const u8 *kek;
2175 size_t kek_len;
2176 size_t igtk_len;
2177
2178 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2179 kek = sm->PTK.kek2;
2180 kek_len = sm->PTK.kek2_len;
2181 } else {
2182 kek = sm->PTK.kek;
2183 kek_len = sm->PTK.kek_len;
2184 }
2185
2186 igtk_len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2187
2188 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
2189 * Key[16+8] */
2190 subelem_len = 1 + 1 + 2 + 6 + 1 + igtk_len + 8;
2191 subelem = os_zalloc(subelem_len);
2192 if (subelem == NULL)
2193 return NULL;
2194
2195 pos = subelem;
2196 *pos++ = FTIE_SUBELEM_IGTK;
2197 *pos++ = subelem_len - 2;
2198 WPA_PUT_LE16(pos, gsm->GN_igtk);
2199 pos += 2;
2200 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
2201 pos += 6;
2202 *pos++ = igtk_len;
2203 if (aes_wrap(kek, kek_len, igtk_len / 8,
2204 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
2205 wpa_printf(MSG_DEBUG,
2206 "FT: IGTK subelem encryption failed: kek_len=%d",
2207 (int) kek_len);
2208 os_free(subelem);
2209 return NULL;
2210 }
2211
2212 *len = subelem_len;
2213 return subelem;
2214 }
2215 #endif /* CONFIG_IEEE80211W */
2216
2217
2218 static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
2219 u8 *pos, u8 *end, u8 id, u8 descr_count,
2220 const u8 *ies, size_t ies_len)
2221 {
2222 struct ieee802_11_elems parse;
2223 struct rsn_rdie *rdie;
2224
2225 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
2226 id, descr_count);
2227 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
2228 ies, ies_len);
2229
2230 if (end - pos < (int) sizeof(*rdie)) {
2231 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
2232 return pos;
2233 }
2234
2235 *pos++ = WLAN_EID_RIC_DATA;
2236 *pos++ = sizeof(*rdie);
2237 rdie = (struct rsn_rdie *) pos;
2238 rdie->id = id;
2239 rdie->descr_count = 0;
2240 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
2241 pos += sizeof(*rdie);
2242
2243 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
2244 ParseFailed) {
2245 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
2246 rdie->status_code =
2247 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2248 return pos;
2249 }
2250
2251 if (parse.wmm_tspec) {
2252 struct wmm_tspec_element *tspec;
2253
2254 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
2255 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
2256 "(%d)", (int) parse.wmm_tspec_len);
2257 rdie->status_code =
2258 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2259 return pos;
2260 }
2261 if (end - pos < (int) sizeof(*tspec)) {
2262 wpa_printf(MSG_ERROR, "FT: Not enough room for "
2263 "response TSPEC");
2264 rdie->status_code =
2265 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2266 return pos;
2267 }
2268 tspec = (struct wmm_tspec_element *) pos;
2269 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
2270 }
2271
2272 #ifdef NEED_AP_MLME
2273 if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
2274 int res;
2275
2276 res = wmm_process_tspec((struct wmm_tspec_element *) pos);
2277 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
2278 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
2279 rdie->status_code =
2280 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
2281 else if (res == WMM_ADDTS_STATUS_REFUSED)
2282 rdie->status_code =
2283 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
2284 else {
2285 /* TSPEC accepted; include updated TSPEC in response */
2286 rdie->descr_count = 1;
2287 pos += sizeof(struct wmm_tspec_element);
2288 }
2289 return pos;
2290 }
2291 #endif /* NEED_AP_MLME */
2292
2293 if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
2294 int res;
2295
2296 res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
2297 sizeof(struct wmm_tspec_element));
2298 if (res >= 0) {
2299 if (res)
2300 rdie->status_code = host_to_le16(res);
2301 else {
2302 /* TSPEC accepted; include updated TSPEC in
2303 * response */
2304 rdie->descr_count = 1;
2305 pos += sizeof(struct wmm_tspec_element);
2306 }
2307 return pos;
2308 }
2309 }
2310
2311 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
2312 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2313 return pos;
2314 }
2315
2316
2317 static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
2318 const u8 *ric, size_t ric_len)
2319 {
2320 const u8 *rpos, *start;
2321 const struct rsn_rdie *rdie;
2322
2323 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
2324
2325 rpos = ric;
2326 while (rpos + sizeof(*rdie) < ric + ric_len) {
2327 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
2328 rpos + 2 + rpos[1] > ric + ric_len)
2329 break;
2330 rdie = (const struct rsn_rdie *) (rpos + 2);
2331 rpos += 2 + rpos[1];
2332 start = rpos;
2333
2334 while (rpos + 2 <= ric + ric_len &&
2335 rpos + 2 + rpos[1] <= ric + ric_len) {
2336 if (rpos[0] == WLAN_EID_RIC_DATA)
2337 break;
2338 rpos += 2 + rpos[1];
2339 }
2340 pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
2341 rdie->descr_count,
2342 start, rpos - start);
2343 }
2344
2345 return pos;
2346 }
2347
2348
2349 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
2350 size_t max_len, int auth_alg,
2351 const u8 *req_ies, size_t req_ies_len)
2352 {
2353 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
2354 u8 *fte_mic, *elem_count;
2355 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
2356 int res;
2357 struct wpa_auth_config *conf;
2358 struct wpa_ft_ies parse;
2359 u8 *ric_start;
2360 u8 *anonce, *snonce;
2361 const u8 *kck;
2362 size_t kck_len;
2363 int use_sha384;
2364
2365 if (sm == NULL)
2366 return pos;
2367
2368 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2369 conf = &sm->wpa_auth->conf;
2370
2371 if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
2372 return pos;
2373
2374 end = pos + max_len;
2375
2376 if (auth_alg == WLAN_AUTH_FT) {
2377 /*
2378 * RSN (only present if this is a Reassociation Response and
2379 * part of a fast BSS transition)
2380 */
2381 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
2382 if (res < 0)
2383 return NULL;
2384 rsnie = pos;
2385 rsnie_len = res;
2386 pos += res;
2387 }
2388
2389 /* Mobility Domain Information */
2390 res = wpa_write_mdie(conf, pos, end - pos);
2391 if (res < 0)
2392 return NULL;
2393 mdie = pos;
2394 mdie_len = res;
2395 pos += res;
2396
2397 /* Fast BSS Transition Information */
2398 if (auth_alg == WLAN_AUTH_FT) {
2399 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
2400 if (!subelem) {
2401 wpa_printf(MSG_DEBUG,
2402 "FT: Failed to add GTK subelement");
2403 return NULL;
2404 }
2405 r0kh_id = sm->r0kh_id;
2406 r0kh_id_len = sm->r0kh_id_len;
2407 anonce = sm->ANonce;
2408 snonce = sm->SNonce;
2409 #ifdef CONFIG_IEEE80211W
2410 if (sm->mgmt_frame_prot) {
2411 u8 *igtk;
2412 size_t igtk_len;
2413 u8 *nbuf;
2414 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
2415 if (igtk == NULL) {
2416 wpa_printf(MSG_DEBUG,
2417 "FT: Failed to add IGTK subelement");
2418 os_free(subelem);
2419 return NULL;
2420 }
2421 nbuf = os_realloc(subelem, subelem_len + igtk_len);
2422 if (nbuf == NULL) {
2423 os_free(subelem);
2424 os_free(igtk);
2425 return NULL;
2426 }
2427 subelem = nbuf;
2428 os_memcpy(subelem + subelem_len, igtk, igtk_len);
2429 subelem_len += igtk_len;
2430 os_free(igtk);
2431 }
2432 #endif /* CONFIG_IEEE80211W */
2433 } else {
2434 r0kh_id = conf->r0_key_holder;
2435 r0kh_id_len = conf->r0_key_holder_len;
2436 anonce = NULL;
2437 snonce = NULL;
2438 }
2439 res = wpa_write_ftie(conf, use_sha384, r0kh_id, r0kh_id_len,
2440 anonce, snonce, pos, end - pos,
2441 subelem, subelem_len);
2442 os_free(subelem);
2443 if (res < 0)
2444 return NULL;
2445 ftie = pos;
2446 ftie_len = res;
2447 pos += res;
2448
2449 if (use_sha384) {
2450 struct rsn_ftie_sha384 *_ftie =
2451 (struct rsn_ftie_sha384 *) (ftie + 2);
2452
2453 fte_mic = _ftie->mic;
2454 elem_count = &_ftie->mic_control[1];
2455 } else {
2456 struct rsn_ftie *_ftie = (struct rsn_ftie *) (ftie + 2);
2457
2458 fte_mic = _ftie->mic;
2459 elem_count = &_ftie->mic_control[1];
2460 }
2461 if (auth_alg == WLAN_AUTH_FT)
2462 *elem_count = 3; /* Information element count */
2463
2464 ric_start = pos;
2465 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse, use_sha384) == 0
2466 && parse.ric) {
2467 pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
2468 parse.ric_len);
2469 if (auth_alg == WLAN_AUTH_FT)
2470 *elem_count +=
2471 ieee802_11_ie_count(ric_start,
2472 pos - ric_start);
2473 }
2474 if (ric_start == pos)
2475 ric_start = NULL;
2476
2477 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2478 kck = sm->PTK.kck2;
2479 kck_len = sm->PTK.kck2_len;
2480 } else {
2481 kck = sm->PTK.kck;
2482 kck_len = sm->PTK.kck_len;
2483 }
2484 if (auth_alg == WLAN_AUTH_FT &&
2485 wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 6,
2486 mdie, mdie_len, ftie, ftie_len,
2487 rsnie, rsnie_len,
2488 ric_start, ric_start ? pos - ric_start : 0,
2489 fte_mic) < 0) {
2490 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
2491 return NULL;
2492 }
2493
2494 os_free(sm->assoc_resp_ftie);
2495 sm->assoc_resp_ftie = os_malloc(ftie_len);
2496 if (!sm->assoc_resp_ftie)
2497 return NULL;
2498 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
2499
2500 return pos;
2501 }
2502
2503
2504 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
2505 int vlan_id,
2506 enum wpa_alg alg, const u8 *addr, int idx,
2507 u8 *key, size_t key_len)
2508 {
2509 if (wpa_auth->cb->set_key == NULL)
2510 return -1;
2511 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
2512 key, key_len);
2513 }
2514
2515
2516 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
2517 {
2518 enum wpa_alg alg;
2519 int klen;
2520
2521 /* MLME-SETKEYS.request(PTK) */
2522 alg = wpa_cipher_to_alg(sm->pairwise);
2523 klen = wpa_cipher_key_len(sm->pairwise);
2524 if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
2525 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
2526 "PTK configuration", sm->pairwise);
2527 return;
2528 }
2529
2530 if (sm->tk_already_set) {
2531 /* Must avoid TK reconfiguration to prevent clearing of TX/RX
2532 * PN in the driver */
2533 wpa_printf(MSG_DEBUG,
2534 "FT: Do not re-install same PTK to the driver");
2535 return;
2536 }
2537
2538 /* FIX: add STA entry to kernel/driver here? The set_key will fail
2539 * most likely without this.. At the moment, STA entry is added only
2540 * after association has been completed. This function will be called
2541 * again after association to get the PTK configured, but that could be
2542 * optimized by adding the STA entry earlier.
2543 */
2544 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2545 sm->PTK.tk, klen))
2546 return;
2547
2548 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2549 sm->pairwise_set = TRUE;
2550 sm->tk_already_set = TRUE;
2551 }
2552
2553
2554 /* Derive PMK-R1 from PSK, check all available PSK */
2555 static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm,
2556 const u8 *req_pmk_r1_name,
2557 u8 *out_pmk_r1, int *out_pairwise,
2558 struct vlan_description *out_vlan,
2559 const u8 **out_identity, size_t *out_identity_len,
2560 const u8 **out_radius_cui,
2561 size_t *out_radius_cui_len,
2562 int *out_session_timeout)
2563 {
2564 const u8 *pmk = NULL;
2565 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2566 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
2567 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2568 const u8 *mdid = wpa_auth->conf.mobility_domain;
2569 const u8 *r0kh = sm->r0kh_id;
2570 size_t r0kh_len = sm->r0kh_id_len;
2571 const u8 *r1kh = wpa_auth->conf.r1_key_holder;
2572 const u8 *ssid = wpa_auth->conf.ssid;
2573 size_t ssid_len = wpa_auth->conf.ssid_len;
2574 int pairwise;
2575
2576 pairwise = sm->pairwise;
2577
2578 for (;;) {
2579 pmk = wpa_ft_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr,
2580 pmk);
2581 if (pmk == NULL)
2582 break;
2583
2584 if (wpa_derive_pmk_r0(pmk, PMK_LEN, ssid, ssid_len, mdid, r0kh,
2585 r0kh_len, sm->addr,
2586 pmk_r0, pmk_r0_name, 0) < 0 ||
2587 wpa_derive_pmk_r1(pmk_r0, PMK_LEN, pmk_r0_name, r1kh,
2588 sm->addr, pmk_r1, pmk_r1_name) < 0 ||
2589 os_memcmp_const(pmk_r1_name, req_pmk_r1_name,
2590 WPA_PMK_NAME_LEN) != 0)
2591 continue;
2592
2593 /* We found a PSK that matches the requested pmk_r1_name */
2594 wpa_printf(MSG_DEBUG,
2595 "FT: Found PSK to generate PMK-R1 locally");
2596 os_memcpy(out_pmk_r1, pmk_r1, PMK_LEN);
2597 if (out_pairwise)
2598 *out_pairwise = pairwise;
2599 if (out_vlan &&
2600 wpa_ft_get_vlan(sm->wpa_auth, sm->addr, out_vlan) < 0) {
2601 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA "
2602 MACSTR, MAC2STR(sm->addr));
2603 return -1;
2604 }
2605
2606 if (out_identity && out_identity_len) {
2607 *out_identity_len = wpa_ft_get_identity(
2608 sm->wpa_auth, sm->addr, out_identity);
2609 }
2610
2611 if (out_radius_cui && out_radius_cui_len) {
2612 *out_radius_cui_len = wpa_ft_get_radius_cui(
2613 sm->wpa_auth, sm->addr, out_radius_cui);
2614 }
2615
2616 if (out_session_timeout) {
2617 *out_session_timeout = wpa_ft_get_session_timeout(
2618 sm->wpa_auth, sm->addr);
2619 }
2620
2621 return 0;
2622 }
2623
2624 wpa_printf(MSG_DEBUG,
2625 "FT: Did not find PSK to generate PMK-R1 locally");
2626 return -1;
2627 }
2628
2629
2630 /* Detect the configuration the station asked for.
2631 * Required to detect FT-PSK and pairwise cipher.
2632 */
2633 static int wpa_ft_set_key_mgmt(struct wpa_state_machine *sm,
2634 struct wpa_ft_ies *parse)
2635 {
2636 int key_mgmt, ciphers;
2637
2638 if (sm->wpa_key_mgmt)
2639 return 0;
2640
2641 key_mgmt = parse->key_mgmt & sm->wpa_auth->conf.wpa_key_mgmt;
2642 if (!key_mgmt) {
2643 wpa_printf(MSG_DEBUG, "FT: Invalid key mgmt (0x%x) from "
2644 MACSTR, parse->key_mgmt, MAC2STR(sm->addr));
2645 return -1;
2646 }
2647 if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
2648 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
2649 #ifdef CONFIG_SHA384
2650 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2651 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
2652 #endif /* CONFIG_SHA384 */
2653 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
2654 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
2655 #ifdef CONFIG_FILS
2656 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256)
2657 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA256;
2658 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384)
2659 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA384;
2660 #endif /* CONFIG_FILS */
2661 ciphers = parse->pairwise_cipher & sm->wpa_auth->conf.rsn_pairwise;
2662 if (!ciphers) {
2663 wpa_printf(MSG_DEBUG, "FT: Invalid pairwise cipher (0x%x) from "
2664 MACSTR,
2665 parse->pairwise_cipher, MAC2STR(sm->addr));
2666 return -1;
2667 }
2668 sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0);
2669
2670 return 0;
2671 }
2672
2673
2674 static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
2675 struct wpa_state_machine *sm,
2676 const u8 *r0kh_id, size_t r0kh_id_len,
2677 const u8 *req_pmk_r0_name,
2678 const u8 *req_pmk_r1_name,
2679 u8 *out_pmk_r1, int *out_pairwise,
2680 struct vlan_description *vlan,
2681 const u8 **identity, size_t *identity_len,
2682 const u8 **radius_cui,
2683 size_t *radius_cui_len,
2684 int *out_session_timeout)
2685 {
2686 struct wpa_auth_config *conf = &wpa_auth->conf;
2687 const struct wpa_ft_pmk_r0_sa *r0;
2688 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
2689 int expires_in = 0;
2690 int session_timeout = 0;
2691 struct os_reltime now;
2692
2693 if (conf->r0_key_holder_len != r0kh_id_len ||
2694 os_memcmp(conf->r0_key_holder, r0kh_id, conf->r0_key_holder_len) !=
2695 0)
2696 return -1; /* not our R0KH-ID */
2697
2698 wpa_printf(MSG_DEBUG, "FT: STA R0KH-ID matching local configuration");
2699 if (wpa_ft_fetch_pmk_r0(sm->wpa_auth, sm->addr, req_pmk_r0_name, &r0) <
2700 0)
2701 return -1; /* no matching PMKR0Name in local cache */
2702
2703 wpa_printf(MSG_DEBUG, "FT: Requested PMKR0Name found in local cache");
2704
2705 if (wpa_derive_pmk_r1(r0->pmk_r0, r0->pmk_r0_len, r0->pmk_r0_name,
2706 conf->r1_key_holder,
2707 sm->addr, out_pmk_r1, pmk_r1_name) < 0)
2708 return -1;
2709 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", out_pmk_r1, r0->pmk_r0_len);
2710 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
2711
2712 os_get_reltime(&now);
2713 if (r0->expiration)
2714 expires_in = r0->expiration - now.sec;
2715
2716 if (r0->session_timeout)
2717 session_timeout = r0->session_timeout - now.sec;
2718
2719 wpa_ft_store_pmk_r1(wpa_auth, sm->addr, out_pmk_r1, r0->pmk_r0_len,
2720 pmk_r1_name,
2721 sm->pairwise, r0->vlan, expires_in, session_timeout,
2722 r0->identity, r0->identity_len,
2723 r0->radius_cui, r0->radius_cui_len);
2724
2725 *out_pairwise = sm->pairwise;
2726 if (vlan) {
2727 if (r0->vlan)
2728 *vlan = *r0->vlan;
2729 else
2730 os_memset(vlan, 0, sizeof(*vlan));
2731 }
2732
2733 if (identity && identity_len) {
2734 *identity = r0->identity;
2735 *identity_len = r0->identity_len;
2736 }
2737
2738 if (radius_cui && radius_cui_len) {
2739 *radius_cui = r0->radius_cui;
2740 *radius_cui_len = r0->radius_cui_len;
2741 }
2742
2743 *out_session_timeout = session_timeout;
2744
2745 return 0;
2746 }
2747
2748
2749 static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
2750 const u8 *ies, size_t ies_len,
2751 u8 **resp_ies, size_t *resp_ies_len)
2752 {
2753 struct rsn_mdie *mdie;
2754 u8 pmk_r1[PMK_LEN_MAX], pmk_r1_name[WPA_PMK_NAME_LEN];
2755 u8 ptk_name[WPA_PMK_NAME_LEN];
2756 struct wpa_auth_config *conf;
2757 struct wpa_ft_ies parse;
2758 size_t buflen;
2759 int ret;
2760 u8 *pos, *end;
2761 int pairwise, session_timeout = 0;
2762 struct vlan_description vlan;
2763 const u8 *identity, *radius_cui;
2764 size_t identity_len = 0, radius_cui_len = 0;
2765 int use_sha384;
2766 size_t pmk_r1_len;
2767
2768 *resp_ies = NULL;
2769 *resp_ies_len = 0;
2770
2771 sm->pmk_r1_name_valid = 0;
2772 conf = &sm->wpa_auth->conf;
2773
2774 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
2775 ies, ies_len);
2776
2777 if (wpa_ft_parse_ies(ies, ies_len, &parse, -1)) {
2778 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
2779 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2780 }
2781 use_sha384 = wpa_key_mgmt_sha384(parse.key_mgmt);
2782 pmk_r1_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
2783
2784 mdie = (struct rsn_mdie *) parse.mdie;
2785 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
2786 os_memcmp(mdie->mobility_domain,
2787 sm->wpa_auth->conf.mobility_domain,
2788 MOBILITY_DOMAIN_ID_LEN) != 0) {
2789 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
2790 return WLAN_STATUS_INVALID_MDIE;
2791 }
2792
2793 if (use_sha384) {
2794 struct rsn_ftie_sha384 *ftie;
2795
2796 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
2797 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
2798 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
2799 return WLAN_STATUS_INVALID_FTIE;
2800 }
2801
2802 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
2803 } else {
2804 struct rsn_ftie *ftie;
2805
2806 ftie = (struct rsn_ftie *) parse.ftie;
2807 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
2808 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
2809 return WLAN_STATUS_INVALID_FTIE;
2810 }
2811
2812 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
2813 }
2814
2815 if (parse.r0kh_id == NULL) {
2816 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
2817 return WLAN_STATUS_INVALID_FTIE;
2818 }
2819
2820 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
2821 parse.r0kh_id, parse.r0kh_id_len);
2822 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
2823 sm->r0kh_id_len = parse.r0kh_id_len;
2824
2825 if (parse.rsn_pmkid == NULL) {
2826 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
2827 return WLAN_STATUS_INVALID_PMKID;
2828 }
2829
2830 if (wpa_ft_set_key_mgmt(sm, &parse) < 0)
2831 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2832
2833 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
2834 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
2835 if (wpa_derive_pmk_r1_name(parse.rsn_pmkid,
2836 sm->wpa_auth->conf.r1_key_holder, sm->addr,
2837 pmk_r1_name) < 0)
2838 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2839 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
2840 pmk_r1_name, WPA_PMK_NAME_LEN);
2841
2842 if (conf->ft_psk_generate_local &&
2843 wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2844 if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise,
2845 &vlan, &identity, &identity_len,
2846 &radius_cui, &radius_cui_len,
2847 &session_timeout) < 0)
2848 return WLAN_STATUS_INVALID_PMKID;
2849 wpa_printf(MSG_DEBUG,
2850 "FT: Generated PMK-R1 for FT-PSK locally");
2851 } else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name,
2852 pmk_r1, &pmk_r1_len, &pairwise, &vlan,
2853 &identity, &identity_len, &radius_cui,
2854 &radius_cui_len, &session_timeout) < 0) {
2855 wpa_printf(MSG_DEBUG,
2856 "FT: No PMK-R1 available in local cache for the requested PMKR1Name");
2857 if (wpa_ft_local_derive_pmk_r1(sm->wpa_auth, sm,
2858 parse.r0kh_id, parse.r0kh_id_len,
2859 parse.rsn_pmkid,
2860 pmk_r1_name, pmk_r1, &pairwise,
2861 &vlan, &identity, &identity_len,
2862 &radius_cui, &radius_cui_len,
2863 &session_timeout) == 0) {
2864 wpa_printf(MSG_DEBUG,
2865 "FT: Generated PMK-R1 based on local PMK-R0");
2866 goto pmk_r1_derived;
2867 }
2868
2869 if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
2870 wpa_printf(MSG_DEBUG,
2871 "FT: Did not have matching PMK-R1 and either unknown or blocked R0KH-ID or NAK from R0KH");
2872 return WLAN_STATUS_INVALID_PMKID;
2873 }
2874
2875 return -1; /* Status pending */
2876 } else {
2877 wpa_printf(MSG_DEBUG, "FT: Found PMKR1Name from local cache");
2878 }
2879
2880 pmk_r1_derived:
2881 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, pmk_r1_len);
2882 sm->pmk_r1_name_valid = 1;
2883 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
2884
2885 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
2886 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
2887 "ANonce");
2888 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2889 }
2890
2891 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
2892 sm->SNonce, WPA_NONCE_LEN);
2893 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
2894 sm->ANonce, WPA_NONCE_LEN);
2895
2896 if (wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
2897 sm->addr, sm->wpa_auth->addr, pmk_r1_name,
2898 &sm->PTK, ptk_name, sm->wpa_key_mgmt,
2899 pairwise) < 0)
2900 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2901
2902 sm->pairwise = pairwise;
2903 sm->PTK_valid = TRUE;
2904 sm->tk_already_set = FALSE;
2905 wpa_ft_install_ptk(sm);
2906
2907 if (wpa_ft_set_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2908 wpa_printf(MSG_DEBUG, "FT: Failed to configure VLAN");
2909 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2910 }
2911 if (wpa_ft_set_identity(sm->wpa_auth, sm->addr,
2912 identity, identity_len) < 0 ||
2913 wpa_ft_set_radius_cui(sm->wpa_auth, sm->addr,
2914 radius_cui, radius_cui_len) < 0) {
2915 wpa_printf(MSG_DEBUG, "FT: Failed to configure identity/CUI");
2916 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2917 }
2918 wpa_ft_set_session_timeout(sm->wpa_auth, sm->addr, session_timeout);
2919
2920 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
2921 2 + FT_R1KH_ID_LEN + 200;
2922 *resp_ies = os_zalloc(buflen);
2923 if (*resp_ies == NULL)
2924 goto fail;
2925
2926 pos = *resp_ies;
2927 end = *resp_ies + buflen;
2928
2929 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
2930 if (ret < 0)
2931 goto fail;
2932 pos += ret;
2933
2934 ret = wpa_write_mdie(conf, pos, end - pos);
2935 if (ret < 0)
2936 goto fail;
2937 pos += ret;
2938
2939 ret = wpa_write_ftie(conf, use_sha384, parse.r0kh_id, parse.r0kh_id_len,
2940 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
2941 if (ret < 0)
2942 goto fail;
2943 pos += ret;
2944
2945 *resp_ies_len = pos - *resp_ies;
2946
2947 return WLAN_STATUS_SUCCESS;
2948 fail:
2949 os_free(*resp_ies);
2950 *resp_ies = NULL;
2951 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2952 }
2953
2954
2955 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
2956 u16 auth_transaction, const u8 *ies, size_t ies_len,
2957 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
2958 u16 auth_transaction, u16 status,
2959 const u8 *ies, size_t ies_len),
2960 void *ctx)
2961 {
2962 u16 status;
2963 u8 *resp_ies;
2964 size_t resp_ies_len;
2965 int res;
2966
2967 if (sm == NULL) {
2968 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
2969 "WPA SM not available");
2970 return;
2971 }
2972
2973 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
2974 " BSSID=" MACSTR " transaction=%d",
2975 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
2976 sm->ft_pending_cb = cb;
2977 sm->ft_pending_cb_ctx = ctx;
2978 sm->ft_pending_auth_transaction = auth_transaction;
2979 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
2980 res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
2981 &resp_ies_len);
2982 if (res < 0) {
2983 wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
2984 return;
2985 }
2986 status = res;
2987
2988 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
2989 " auth_transaction=%d status=%d",
2990 MAC2STR(sm->addr), auth_transaction + 1, status);
2991 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
2992 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
2993 resp_ies, resp_ies_len);
2994 os_free(resp_ies);
2995 }
2996
2997
2998 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
2999 size_t ies_len)
3000 {
3001 struct wpa_ft_ies parse;
3002 struct rsn_mdie *mdie;
3003 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
3004 size_t mic_len = 16;
3005 unsigned int count;
3006 const u8 *kck;
3007 size_t kck_len;
3008 int use_sha384;
3009 const u8 *anonce, *snonce, *fte_mic;
3010 u8 fte_elem_count;
3011
3012 if (sm == NULL)
3013 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3014
3015 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3016
3017 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
3018
3019 if (wpa_ft_parse_ies(ies, ies_len, &parse, use_sha384) < 0) {
3020 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
3021 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3022 }
3023
3024 if (parse.rsn == NULL) {
3025 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
3026 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3027 }
3028
3029 if (parse.rsn_pmkid == NULL) {
3030 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
3031 return WLAN_STATUS_INVALID_PMKID;
3032 }
3033
3034 if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
3035 != 0) {
3036 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
3037 "with the PMKR1Name derived from auth request");
3038 return WLAN_STATUS_INVALID_PMKID;
3039 }
3040
3041 mdie = (struct rsn_mdie *) parse.mdie;
3042 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
3043 os_memcmp(mdie->mobility_domain,
3044 sm->wpa_auth->conf.mobility_domain,
3045 MOBILITY_DOMAIN_ID_LEN) != 0) {
3046 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
3047 return WLAN_STATUS_INVALID_MDIE;
3048 }
3049
3050 if (use_sha384) {
3051 struct rsn_ftie_sha384 *ftie;
3052
3053 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
3054 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3055 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3056 return WLAN_STATUS_INVALID_FTIE;
3057 }
3058
3059 anonce = ftie->anonce;
3060 snonce = ftie->snonce;
3061 fte_elem_count = ftie->mic_control[1];
3062 fte_mic = ftie->mic;
3063 } else {
3064 struct rsn_ftie *ftie;
3065
3066 ftie = (struct rsn_ftie *) parse.ftie;
3067 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3068 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3069 return WLAN_STATUS_INVALID_FTIE;
3070 }
3071
3072 anonce = ftie->anonce;
3073 snonce = ftie->snonce;
3074 fte_elem_count = ftie->mic_control[1];
3075 fte_mic = ftie->mic;
3076 }
3077
3078 if (os_memcmp(snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
3079 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
3080 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3081 snonce, WPA_NONCE_LEN);
3082 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
3083 sm->SNonce, WPA_NONCE_LEN);
3084 return WLAN_STATUS_INVALID_FTIE;
3085 }
3086
3087 if (os_memcmp(anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
3088 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
3089 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
3090 anonce, WPA_NONCE_LEN);
3091 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
3092 sm->ANonce, WPA_NONCE_LEN);
3093 return WLAN_STATUS_INVALID_FTIE;
3094 }
3095
3096
3097 if (parse.r0kh_id == NULL) {
3098 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
3099 return WLAN_STATUS_INVALID_FTIE;
3100 }
3101
3102 if (parse.r0kh_id_len != sm->r0kh_id_len ||
3103 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
3104 {
3105 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
3106 "the current R0KH-ID");
3107 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
3108 parse.r0kh_id, parse.r0kh_id_len);
3109 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
3110 sm->r0kh_id, sm->r0kh_id_len);
3111 return WLAN_STATUS_INVALID_FTIE;
3112 }
3113
3114 if (parse.r1kh_id == NULL) {
3115 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
3116 return WLAN_STATUS_INVALID_FTIE;
3117 }
3118
3119 if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
3120 FT_R1KH_ID_LEN) != 0) {
3121 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
3122 "ReassocReq");
3123 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
3124 parse.r1kh_id, FT_R1KH_ID_LEN);
3125 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
3126 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
3127 return WLAN_STATUS_INVALID_FTIE;
3128 }
3129
3130 if (parse.rsn_pmkid == NULL ||
3131 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
3132 {
3133 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
3134 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
3135 return WLAN_STATUS_INVALID_PMKID;
3136 }
3137
3138 count = 3;
3139 if (parse.ric)
3140 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
3141 if (fte_elem_count != count) {
3142 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
3143 "Control: received %u expected %u",
3144 fte_elem_count, count);
3145 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3146 }
3147
3148 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
3149 kck = sm->PTK.kck2;
3150 kck_len = sm->PTK.kck2_len;
3151 } else {
3152 kck = sm->PTK.kck;
3153 kck_len = sm->PTK.kck_len;
3154 }
3155 if (wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 5,
3156 parse.mdie - 2, parse.mdie_len + 2,
3157 parse.ftie - 2, parse.ftie_len + 2,
3158 parse.rsn - 2, parse.rsn_len + 2,
3159 parse.ric, parse.ric_len,
3160 mic) < 0) {
3161 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
3162 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3163 }
3164
3165 if (os_memcmp_const(mic, fte_mic, mic_len) != 0) {
3166 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
3167 wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
3168 MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
3169 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
3170 fte_mic, mic_len);
3171 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
3172 wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
3173 parse.mdie - 2, parse.mdie_len + 2);
3174 wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
3175 parse.ftie - 2, parse.ftie_len + 2);
3176 wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
3177 parse.rsn - 2, parse.rsn_len + 2);
3178 return WLAN_STATUS_INVALID_FTIE;
3179 }
3180
3181 return WLAN_STATUS_SUCCESS;
3182 }
3183
3184
3185 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
3186 {
3187 const u8 *sta_addr, *target_ap;
3188 const u8 *ies;
3189 size_t ies_len;
3190 u8 action;
3191 struct ft_rrb_frame *frame;
3192
3193 if (sm == NULL)
3194 return -1;
3195
3196 /*
3197 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3198 * FT Request action frame body[variable]
3199 */
3200
3201 if (len < 14) {
3202 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
3203 "(len=%lu)", (unsigned long) len);
3204 return -1;
3205 }
3206
3207 action = data[1];
3208 sta_addr = data + 2;
3209 target_ap = data + 8;
3210 ies = data + 14;
3211 ies_len = len - 14;
3212
3213 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
3214 " Target AP=" MACSTR " Action=%d)",
3215 MAC2STR(sta_addr), MAC2STR(target_ap), action);
3216
3217 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
3218 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
3219 "STA=" MACSTR " STA-Address=" MACSTR,
3220 MAC2STR(sm->addr), MAC2STR(sta_addr));
3221 return -1;
3222 }
3223
3224 /*
3225 * Do some sanity checking on the target AP address (not own and not
3226 * broadcast. This could be extended to filter based on a list of known
3227 * APs in the MD (if such a list were configured).
3228 */
3229 if ((target_ap[0] & 0x01) ||
3230 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
3231 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
3232 "frame");
3233 return -1;
3234 }
3235
3236 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
3237
3238 if (!sm->wpa_auth->conf.ft_over_ds) {
3239 wpa_printf(MSG_DEBUG, "FT: Over-DS option disabled - reject");
3240 return -1;
3241 }
3242
3243 /* RRB - Forward action frame to the target AP */
3244 frame = os_malloc(sizeof(*frame) + len);
3245 if (frame == NULL)
3246 return -1;
3247 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3248 frame->packet_type = FT_PACKET_REQUEST;
3249 frame->action_length = host_to_le16(len);
3250 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
3251 os_memcpy(frame + 1, data, len);
3252
3253 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
3254 sizeof(*frame) + len);
3255 os_free(frame);
3256
3257 return 0;
3258 }
3259
3260
3261 static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
3262 u16 auth_transaction, u16 resp,
3263 const u8 *ies, size_t ies_len)
3264 {
3265 struct wpa_state_machine *sm = ctx;
3266 wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
3267 MAC2STR(sm->addr));
3268 wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
3269 WLAN_STATUS_SUCCESS, ies, ies_len);
3270 }
3271
3272
3273 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
3274 const u8 *current_ap, const u8 *sta_addr,
3275 const u8 *body, size_t len)
3276 {
3277 struct wpa_state_machine *sm;
3278 u16 status;
3279 u8 *resp_ies;
3280 size_t resp_ies_len;
3281 int res;
3282
3283 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
3284 if (sm == NULL) {
3285 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
3286 "RRB Request");
3287 return -1;
3288 }
3289
3290 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
3291
3292 sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
3293 sm->ft_pending_cb_ctx = sm;
3294 os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
3295 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3296 res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
3297 &resp_ies_len);
3298 if (res < 0) {
3299 wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
3300 return 0;
3301 }
3302 status = res;
3303
3304 res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
3305 resp_ies, resp_ies_len);
3306 os_free(resp_ies);
3307 return res;
3308 }
3309
3310
3311 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
3312 const u8 *current_ap, const u8 *sta_addr,
3313 u16 status, const u8 *resp_ies,
3314 size_t resp_ies_len)
3315 {
3316 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3317 size_t rlen;
3318 struct ft_rrb_frame *frame;
3319 u8 *pos;
3320
3321 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
3322 " CurrentAP=" MACSTR " status=%d",
3323 MAC2STR(sm->addr), MAC2STR(current_ap), status);
3324 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3325
3326 /* RRB - Forward action frame response to the Current AP */
3327
3328 /*
3329 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3330 * Status_Code[2] FT Request action frame body[variable]
3331 */
3332 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
3333
3334 frame = os_malloc(sizeof(*frame) + rlen);
3335 if (frame == NULL)
3336 return -1;
3337 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3338 frame->packet_type = FT_PACKET_RESPONSE;
3339 frame->action_length = host_to_le16(rlen);
3340 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
3341 pos = (u8 *) (frame + 1);
3342 *pos++ = WLAN_ACTION_FT;
3343 *pos++ = 2; /* Action: Response */
3344 os_memcpy(pos, sta_addr, ETH_ALEN);
3345 pos += ETH_ALEN;
3346 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
3347 pos += ETH_ALEN;
3348 WPA_PUT_LE16(pos, status);
3349 pos += 2;
3350 if (resp_ies)
3351 os_memcpy(pos, resp_ies, resp_ies_len);
3352
3353 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
3354 sizeof(*frame) + rlen);
3355 os_free(frame);
3356
3357 return 0;
3358 }
3359
3360
3361 static int wpa_ft_rrb_build_r0(const u8 *key, const size_t key_len,
3362 const struct tlv_list *tlvs,
3363 const struct wpa_ft_pmk_r0_sa *pmk_r0,
3364 const u8 *r1kh_id, const u8 *s1kh_id,
3365 const struct tlv_list *tlv_auth,
3366 const u8 *src_addr, u8 type,
3367 u8 **packet, size_t *packet_len)
3368 {
3369 u8 pmk_r1[PMK_LEN_MAX];
3370 size_t pmk_r1_len = pmk_r0->pmk_r0_len;
3371 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
3372 u8 f_pairwise[sizeof(le16)];
3373 u8 f_expires_in[sizeof(le16)];
3374 u8 f_session_timeout[sizeof(le32)];
3375 int expires_in;
3376 int session_timeout;
3377 struct os_reltime now;
3378 int ret;
3379 struct tlv_list sess_tlv[] = {
3380 { .type = FT_RRB_PMK_R1, .len = pmk_r1_len,
3381 .data = pmk_r1 },
3382 { .type = FT_RRB_PMK_R1_NAME, .len = sizeof(pmk_r1_name),
3383 .data = pmk_r1_name },
3384 { .type = FT_RRB_PAIRWISE, .len = sizeof(f_pairwise),
3385 .data = f_pairwise },
3386 { .type = FT_RRB_EXPIRES_IN, .len = sizeof(f_expires_in),
3387 .data = f_expires_in },
3388 { .type = FT_RRB_IDENTITY, .len = pmk_r0->identity_len,
3389 .data = pmk_r0->identity },
3390 { .type = FT_RRB_RADIUS_CUI, .len = pmk_r0->radius_cui_len,
3391 .data = pmk_r0->radius_cui },
3392 { .type = FT_RRB_SESSION_TIMEOUT,
3393 .len = sizeof(f_session_timeout),
3394 .data = f_session_timeout },
3395 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
3396 };
3397
3398 if (wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_len,
3399 pmk_r0->pmk_r0_name, r1kh_id,
3400 s1kh_id, pmk_r1, pmk_r1_name) < 0)
3401 return -1;
3402 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 (for peer AP)",
3403 pmk_r1, pmk_r1_len);
3404 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name (for peer AP)",
3405 pmk_r1_name, WPA_PMK_NAME_LEN);
3406 WPA_PUT_LE16(f_pairwise, pmk_r0->pairwise);
3407
3408 os_get_reltime(&now);
3409 if (pmk_r0->expiration > now.sec)
3410 expires_in = pmk_r0->expiration - now.sec;
3411 else if (pmk_r0->expiration)
3412 expires_in = 1;
3413 else
3414 expires_in = 0;
3415 WPA_PUT_LE16(f_expires_in, expires_in);
3416
3417 if (pmk_r0->session_timeout > now.sec)
3418 session_timeout = pmk_r0->session_timeout - now.sec;
3419 else if (pmk_r0->session_timeout)
3420 session_timeout = 1;
3421 else
3422 session_timeout = 0;
3423 WPA_PUT_LE32(f_session_timeout, session_timeout);
3424
3425 ret = wpa_ft_rrb_build(key, key_len, tlvs, sess_tlv, tlv_auth,
3426 pmk_r0->vlan, src_addr, type,
3427 packet, packet_len);
3428
3429 os_memset(pmk_r1, 0, sizeof(pmk_r1));
3430
3431 return ret;
3432 }
3433
3434
3435 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
3436 const u8 *src_addr,
3437 const u8 *enc, size_t enc_len,
3438 const u8 *auth, size_t auth_len,
3439 int no_defer)
3440 {
3441 const char *msgtype = "pull request";
3442 u8 *plain = NULL, *packet = NULL;
3443 size_t plain_len = 0, packet_len = 0;
3444 struct ft_remote_r1kh *r1kh, *r1kh_wildcard;
3445 const u8 *key;
3446 size_t key_len;
3447 int seq_ret;
3448 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id, *f_s1kh_id, *f_pmk_r0_name;
3449 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len, f_s1kh_id_len;
3450 size_t f_pmk_r0_name_len;
3451 const struct wpa_ft_pmk_r0_sa *r0;
3452 int ret;
3453 struct tlv_list resp[2];
3454 struct tlv_list resp_auth[5];
3455 struct ft_rrb_seq f_seq;
3456
3457 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
3458
3459 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3460 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3461
3462 if (wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len)) {
3463 wpa_printf(MSG_DEBUG, "FT: R0KH-ID mismatch");
3464 goto out;
3465 }
3466
3467 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3468 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3469
3470 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh, &r1kh_wildcard);
3471 if (r1kh) {
3472 key = r1kh->key;
3473 key_len = sizeof(r1kh->key);
3474 } else if (r1kh_wildcard) {
3475 wpa_printf(MSG_DEBUG, "FT: Using wildcard R1KH-ID");
3476 key = r1kh_wildcard->key;
3477 key_len = sizeof(r1kh_wildcard->key);
3478 } else {
3479 goto out;
3480 }
3481
3482 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "pull request", FT_RRB_NONCE_LEN);
3483 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
3484
3485 seq_ret = FT_RRB_SEQ_DROP;
3486 if (r1kh)
3487 seq_ret = wpa_ft_rrb_seq_chk(r1kh->seq, src_addr, enc, enc_len,
3488 auth, auth_len, msgtype, no_defer);
3489 if (!no_defer && r1kh_wildcard &&
3490 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
3491 /* wildcard: r1kh-id unknown or changed addr -> do a seq req */
3492 seq_ret = FT_RRB_SEQ_DEFER;
3493 }
3494
3495 if (seq_ret == FT_RRB_SEQ_DROP)
3496 goto out;
3497
3498 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3499 src_addr, FT_PACKET_R0KH_R1KH_PULL,
3500 &plain, &plain_len) < 0)
3501 goto out;
3502
3503 if (!r1kh)
3504 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard, src_addr,
3505 f_r1kh_id,
3506 wpa_auth->conf.rkh_pos_timeout);
3507 if (!r1kh)
3508 goto out;
3509
3510 if (seq_ret == FT_RRB_SEQ_DEFER) {
3511 wpa_ft_rrb_seq_req(wpa_auth, r1kh->seq, src_addr, f_r0kh_id,
3512 f_r0kh_id_len, f_r1kh_id, key, key_len,
3513 enc, enc_len, auth, auth_len,
3514 &wpa_ft_rrb_rx_pull);
3515 goto out;
3516 }
3517
3518 wpa_ft_rrb_seq_accept(wpa_auth, r1kh->seq, src_addr, auth, auth_len,
3519 msgtype);
3520 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
3521 wpa_auth->conf.rkh_pos_timeout);
3522
3523 RRB_GET(FT_RRB_PMK_R0_NAME, pmk_r0_name, msgtype, WPA_PMK_NAME_LEN);
3524 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", f_pmk_r0_name,
3525 f_pmk_r0_name_len);
3526
3527 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3528 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3529
3530 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
3531 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
3532 goto out;
3533 }
3534
3535 resp[0].type = FT_RRB_S1KH_ID;
3536 resp[0].len = f_s1kh_id_len;
3537 resp[0].data = f_s1kh_id;
3538 resp[1].type = FT_RRB_LAST_EMPTY;
3539 resp[1].len = 0;
3540 resp[1].data = NULL;
3541
3542 resp_auth[0].type = FT_RRB_NONCE;
3543 resp_auth[0].len = f_nonce_len;
3544 resp_auth[0].data = f_nonce;
3545 resp_auth[1].type = FT_RRB_SEQ;
3546 resp_auth[1].len = sizeof(f_seq);
3547 resp_auth[1].data = (u8 *) &f_seq;
3548 resp_auth[2].type = FT_RRB_R0KH_ID;
3549 resp_auth[2].len = f_r0kh_id_len;
3550 resp_auth[2].data = f_r0kh_id;
3551 resp_auth[3].type = FT_RRB_R1KH_ID;
3552 resp_auth[3].len = f_r1kh_id_len;
3553 resp_auth[3].data = f_r1kh_id;
3554 resp_auth[4].type = FT_RRB_LAST_EMPTY;
3555 resp_auth[4].len = 0;
3556 resp_auth[4].data = NULL;
3557
3558 if (wpa_ft_fetch_pmk_r0(wpa_auth, f_s1kh_id, f_pmk_r0_name, &r0) < 0) {
3559 wpa_printf(MSG_DEBUG, "FT: No matching PMK-R0-Name found");
3560 ret = wpa_ft_rrb_build(key, key_len, resp, NULL, resp_auth,
3561 NULL, wpa_auth->addr,
3562 FT_PACKET_R0KH_R1KH_RESP,
3563 &packet, &packet_len);
3564 } else {
3565 ret = wpa_ft_rrb_build_r0(key, key_len, resp, r0, f_r1kh_id,
3566 f_s1kh_id, resp_auth, wpa_auth->addr,
3567 FT_PACKET_R0KH_R1KH_RESP,
3568 &packet, &packet_len);
3569 }
3570
3571 if (!ret)
3572 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
3573 FT_PACKET_R0KH_R1KH_RESP, packet,
3574 packet_len);
3575
3576 out:
3577 os_free(plain);
3578 os_free(packet);
3579
3580 return 0;
3581 }
3582
3583
3584 /* @returns 0 on success
3585 * -1 on error
3586 * -2 if FR_RRB_PAIRWISE is missing
3587 */
3588 static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth,
3589 const u8 *src_addr, u8 type,
3590 const u8 *enc, size_t enc_len,
3591 const u8 *auth, size_t auth_len,
3592 const char *msgtype, u8 *s1kh_id_out,
3593 int (*cb)(struct wpa_authenticator *wpa_auth,
3594 const u8 *src_addr,
3595 const u8 *enc, size_t enc_len,
3596 const u8 *auth, size_t auth_len,
3597 int no_defer))
3598 {
3599 u8 *plain = NULL;
3600 size_t plain_len = 0;
3601 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
3602 const u8 *key;
3603 size_t key_len;
3604 int seq_ret;
3605 const u8 *f_r1kh_id, *f_s1kh_id, *f_r0kh_id;
3606 const u8 *f_pmk_r1_name, *f_pairwise, *f_pmk_r1;
3607 const u8 *f_expires_in;
3608 size_t f_r1kh_id_len, f_s1kh_id_len, f_r0kh_id_len;
3609 const u8 *f_identity, *f_radius_cui;
3610 const u8 *f_session_timeout;
3611 size_t f_pmk_r1_name_len, f_pairwise_len, f_pmk_r1_len;
3612 size_t f_expires_in_len;
3613 size_t f_identity_len, f_radius_cui_len;
3614 size_t f_session_timeout_len;
3615 int pairwise;
3616 int ret = -1;
3617 int expires_in;
3618 int session_timeout;
3619 struct vlan_description vlan;
3620 size_t pmk_r1_len;
3621
3622 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3623 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3624
3625 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3626 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3627
3628 if (wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id)) {
3629 wpa_printf(MSG_DEBUG, "FT: R1KH-ID mismatch");
3630 goto out;
3631 }
3632
3633 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, &r0kh,
3634 &r0kh_wildcard);
3635 if (r0kh) {
3636 key = r0kh->key;
3637 key_len = sizeof(r0kh->key);
3638 } else if (r0kh_wildcard) {
3639 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
3640 key = r0kh_wildcard->key;
3641 key_len = sizeof(r0kh_wildcard->key);
3642 } else {
3643 goto out;
3644 }
3645
3646 seq_ret = FT_RRB_SEQ_DROP;
3647 if (r0kh) {
3648 seq_ret = wpa_ft_rrb_seq_chk(r0kh->seq, src_addr, enc, enc_len,
3649 auth, auth_len, msgtype,
3650 cb ? 0 : 1);
3651 }
3652 if (cb && r0kh_wildcard &&
3653 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
3654 /* wildcard: r0kh-id unknown or changed addr -> do a seq req */
3655 seq_ret = FT_RRB_SEQ_DEFER;
3656 }
3657
3658 if (seq_ret == FT_RRB_SEQ_DROP)
3659 goto out;
3660
3661 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3662 src_addr, type, &plain, &plain_len) < 0)
3663 goto out;
3664
3665 if (!r0kh)
3666 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, src_addr,
3667 f_r0kh_id, f_r0kh_id_len,
3668 wpa_auth->conf.rkh_pos_timeout);
3669 if (!r0kh)
3670 goto out;
3671
3672 if (seq_ret == FT_RRB_SEQ_DEFER) {
3673 wpa_ft_rrb_seq_req(wpa_auth, r0kh->seq, src_addr, f_r0kh_id,
3674 f_r0kh_id_len, f_r1kh_id, key, key_len,
3675 enc, enc_len, auth, auth_len, cb);
3676 goto out;
3677 }
3678
3679 wpa_ft_rrb_seq_accept(wpa_auth, r0kh->seq, src_addr, auth, auth_len,
3680 msgtype);
3681 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
3682 wpa_auth->conf.rkh_pos_timeout);
3683
3684 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3685 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3686
3687 if (s1kh_id_out)
3688 os_memcpy(s1kh_id_out, f_s1kh_id, ETH_ALEN);
3689
3690 ret = -2;
3691 RRB_GET(FT_RRB_PAIRWISE, pairwise, msgtype, sizeof(le16));
3692 wpa_hexdump(MSG_DEBUG, "FT: pairwise", f_pairwise, f_pairwise_len);
3693
3694 ret = -1;
3695 RRB_GET(FT_RRB_PMK_R1_NAME, pmk_r1_name, msgtype, WPA_PMK_NAME_LEN);
3696 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
3697 f_pmk_r1_name, WPA_PMK_NAME_LEN);
3698
3699 pmk_r1_len = PMK_LEN;
3700 if (wpa_ft_rrb_get_tlv(plain, plain_len, FT_RRB_PMK_R1, &f_pmk_r1_len,
3701 &f_pmk_r1) == 0 &&
3702 (f_pmk_r1_len == PMK_LEN || f_pmk_r1_len == SHA384_MAC_LEN))
3703 pmk_r1_len = f_pmk_r1_len;
3704 RRB_GET(FT_RRB_PMK_R1, pmk_r1, msgtype, pmk_r1_len);
3705 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f_pmk_r1, pmk_r1_len);
3706
3707 pairwise = WPA_GET_LE16(f_pairwise);
3708
3709 RRB_GET_OPTIONAL(FT_RRB_EXPIRES_IN, expires_in, msgtype,
3710 sizeof(le16));
3711 if (f_expires_in)
3712 expires_in = WPA_GET_LE16(f_expires_in);
3713 else
3714 expires_in = 0;
3715
3716 wpa_printf(MSG_DEBUG, "FT: PMK-R1 %s - expires_in=%d", msgtype,
3717 expires_in);
3718
3719 if (wpa_ft_rrb_get_tlv_vlan(plain, plain_len, &vlan) < 0) {
3720 wpa_printf(MSG_DEBUG, "FT: Cannot parse vlan");
3721 wpa_ft_rrb_dump(plain, plain_len);
3722 goto out;
3723 }
3724
3725 wpa_printf(MSG_DEBUG, "FT: vlan %d%s",
3726 le_to_host16(vlan.untagged), vlan.tagged[0] ? "+" : "");
3727
3728 RRB_GET_OPTIONAL(FT_RRB_IDENTITY, identity, msgtype, -1);
3729 if (f_identity)
3730 wpa_hexdump_ascii(MSG_DEBUG, "FT: Identity", f_identity,
3731 f_identity_len);
3732
3733 RRB_GET_OPTIONAL(FT_RRB_RADIUS_CUI, radius_cui, msgtype, -1);
3734 if (f_radius_cui)
3735 wpa_hexdump_ascii(MSG_DEBUG, "FT: CUI", f_radius_cui,
3736 f_radius_cui_len);
3737
3738 RRB_GET_OPTIONAL(FT_RRB_SESSION_TIMEOUT, session_timeout, msgtype,
3739 sizeof(le32));
3740 if (f_session_timeout)
3741 session_timeout = WPA_GET_LE32(f_session_timeout);
3742 else
3743 session_timeout = 0;
3744 wpa_printf(MSG_DEBUG, "FT: session_timeout %d", session_timeout);
3745
3746 if (wpa_ft_store_pmk_r1(wpa_auth, f_s1kh_id, f_pmk_r1, pmk_r1_len,
3747 f_pmk_r1_name,
3748 pairwise, &vlan, expires_in, session_timeout,
3749 f_identity, f_identity_len, f_radius_cui,
3750 f_radius_cui_len) < 0)
3751 goto out;
3752
3753 ret = 0;
3754 out:
3755 if (plain) {
3756 os_memset(plain, 0, plain_len);
3757 os_free(plain);
3758 }
3759
3760 return ret;
3761
3762 }
3763
3764
3765 static void ft_finish_pull(struct wpa_state_machine *sm)
3766 {
3767 int res;
3768 u8 *resp_ies;
3769 size_t resp_ies_len;
3770 u16 status;
3771
3772 if (!sm->ft_pending_cb || !sm->ft_pending_req_ies)
3773 return;
3774
3775 res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
3776 wpabuf_len(sm->ft_pending_req_ies),
3777 &resp_ies, &resp_ies_len);
3778 if (res < 0) {
3779 /* this loop is broken by ft_pending_pull_left_retries */
3780 wpa_printf(MSG_DEBUG,
3781 "FT: Callback postponed until response is available");
3782 return;
3783 }
3784 wpabuf_free(sm->ft_pending_req_ies);
3785 sm->ft_pending_req_ies = NULL;
3786 status = res;
3787 wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
3788 " - status %u", MAC2STR(sm->addr), status);
3789
3790 sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
3791 sm->ft_pending_auth_transaction + 1, status,
3792 resp_ies, resp_ies_len);
3793 os_free(resp_ies);
3794 }
3795
3796
3797 struct ft_get_sta_ctx {
3798 const u8 *nonce;
3799 const u8 *s1kh_id;
3800 struct wpa_state_machine *sm;
3801 };
3802
3803
3804 static int ft_get_sta_cb(struct wpa_state_machine *sm, void *ctx)
3805 {
3806 struct ft_get_sta_ctx *info = ctx;
3807
3808 if ((info->s1kh_id &&
3809 os_memcmp(info->s1kh_id, sm->addr, ETH_ALEN) != 0) ||
3810 os_memcmp(info->nonce, sm->ft_pending_pull_nonce,
3811 FT_RRB_NONCE_LEN) != 0 ||
3812 sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
3813 return 0;
3814
3815 info->sm = sm;
3816
3817 return 1;
3818 }
3819
3820
3821 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
3822 const u8 *src_addr,
3823 const u8 *enc, size_t enc_len,
3824 const u8 *auth, size_t auth_len,
3825 int no_defer)
3826 {
3827 const char *msgtype = "pull response";
3828 int nak, ret = -1;
3829 struct ft_get_sta_ctx ctx;
3830 u8 s1kh_id[ETH_ALEN];
3831 const u8 *f_nonce;
3832 size_t f_nonce_len;
3833
3834 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
3835
3836 RRB_GET_AUTH(FT_RRB_NONCE, nonce, msgtype, FT_RRB_NONCE_LEN);
3837 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
3838
3839 os_memset(&ctx, 0, sizeof(ctx));
3840 ctx.nonce = f_nonce;
3841 if (!wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
3842 /* nonce not found */
3843 wpa_printf(MSG_DEBUG, "FT: Invalid nonce");
3844 return -1;
3845 }
3846
3847 ret = wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_RESP,
3848 enc, enc_len, auth, auth_len, msgtype, s1kh_id,
3849 no_defer ? NULL : &wpa_ft_rrb_rx_resp);
3850 if (ret == -2) {
3851 ret = 0;
3852 nak = 1;
3853 } else {
3854 nak = 0;
3855 }
3856 if (ret < 0)
3857 return -1;
3858
3859 ctx.s1kh_id = s1kh_id;
3860 if (wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
3861 wpa_printf(MSG_DEBUG,
3862 "FT: Response to a pending pull request for " MACSTR,
3863 MAC2STR(ctx.sm->addr));
3864 eloop_cancel_timeout(wpa_ft_expire_pull, ctx.sm, NULL);
3865 if (nak)
3866 ctx.sm->ft_pending_pull_left_retries = 0;
3867 ft_finish_pull(ctx.sm);
3868 }
3869
3870 out:
3871 return ret;
3872 }
3873
3874
3875 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
3876 const u8 *src_addr,
3877 const u8 *enc, size_t enc_len,
3878 const u8 *auth, size_t auth_len, int no_defer)
3879 {
3880 const char *msgtype = "push";
3881
3882 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
3883
3884 if (wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_PUSH,
3885 enc, enc_len, auth, auth_len, msgtype, NULL,
3886 no_defer ? NULL : wpa_ft_rrb_rx_push) < 0)
3887 return -1;
3888
3889 return 0;
3890 }
3891
3892
3893 static int wpa_ft_rrb_rx_seq(struct wpa_authenticator *wpa_auth,
3894 const u8 *src_addr, int type,
3895 const u8 *enc, size_t enc_len,
3896 const u8 *auth, size_t auth_len,
3897 struct ft_remote_seq **rkh_seq,
3898 u8 **key, size_t *key_len,
3899 struct ft_remote_r0kh **r0kh_out,
3900 struct ft_remote_r1kh **r1kh_out,
3901 struct ft_remote_r0kh **r0kh_wildcard_out,
3902 struct ft_remote_r1kh **r1kh_wildcard_out)
3903 {
3904 struct ft_remote_r0kh *r0kh = NULL;
3905 struct ft_remote_r1kh *r1kh = NULL;
3906 const u8 *f_r0kh_id, *f_r1kh_id;
3907 size_t f_r0kh_id_len, f_r1kh_id_len;
3908 int to_r0kh, to_r1kh;
3909 u8 *plain = NULL;
3910 size_t plain_len = 0;
3911 struct ft_remote_r0kh *r0kh_wildcard;
3912 struct ft_remote_r1kh *r1kh_wildcard;
3913
3914 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
3915 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
3916
3917 to_r0kh = !wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len);
3918 to_r1kh = !wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id);
3919
3920 if (to_r0kh && to_r1kh) {
3921 wpa_printf(MSG_DEBUG, "FT: seq - local R0KH-ID and R1KH-ID");
3922 goto out;
3923 }
3924
3925 if (!to_r0kh && !to_r1kh) {
3926 wpa_printf(MSG_DEBUG, "FT: seq - remote R0KH-ID and R1KH-ID");
3927 goto out;
3928 }
3929
3930 if (!to_r0kh) {
3931 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
3932 &r0kh, &r0kh_wildcard);
3933 if (!r0kh_wildcard &&
3934 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
3935 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
3936 f_r0kh_id, f_r0kh_id_len);
3937 goto out;
3938 }
3939 if (r0kh) {
3940 *key = r0kh->key;
3941 *key_len = sizeof(r0kh->key);
3942 } else {
3943 *key = r0kh_wildcard->key;
3944 *key_len = sizeof(r0kh_wildcard->key);
3945 }
3946 }
3947
3948 if (!to_r1kh) {
3949 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh,
3950 &r1kh_wildcard);
3951 if (!r1kh_wildcard &&
3952 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
3953 wpa_hexdump(MSG_DEBUG, "FT: Did not find R1KH-ID",
3954 f_r1kh_id, FT_R1KH_ID_LEN);
3955 goto out;
3956 }
3957 if (r1kh) {
3958 *key = r1kh->key;
3959 *key_len = sizeof(r1kh->key);
3960 } else {
3961 *key = r1kh_wildcard->key;
3962 *key_len = sizeof(r1kh_wildcard->key);
3963 }
3964 }
3965
3966 if (wpa_ft_rrb_decrypt(*key, *key_len, enc, enc_len, auth, auth_len,
3967 src_addr, type, &plain, &plain_len) < 0)
3968 goto out;
3969
3970 os_free(plain);
3971
3972 if (!to_r0kh) {
3973 if (!r0kh)
3974 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard,
3975 src_addr, f_r0kh_id,
3976 f_r0kh_id_len,
3977 ftRRBseqTimeout);
3978 if (!r0kh)
3979 goto out;
3980
3981 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, ftRRBseqTimeout);
3982 *rkh_seq = r0kh->seq;
3983 if (r0kh_out)
3984 *r0kh_out = r0kh;
3985 if (r0kh_wildcard_out)
3986 *r0kh_wildcard_out = r0kh_wildcard;
3987 }
3988
3989 if (!to_r1kh) {
3990 if (!r1kh)
3991 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard,
3992 src_addr, f_r1kh_id,
3993 ftRRBseqTimeout);
3994 if (!r1kh)
3995 goto out;
3996
3997 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, ftRRBseqTimeout);
3998 *rkh_seq = r1kh->seq;
3999 if (r1kh_out)
4000 *r1kh_out = r1kh;
4001 if (r1kh_wildcard_out)
4002 *r1kh_wildcard_out = r1kh_wildcard;
4003 }
4004
4005 return 0;
4006 out:
4007 return -1;
4008 }
4009
4010
4011 static int wpa_ft_rrb_rx_seq_req(struct wpa_authenticator *wpa_auth,
4012 const u8 *src_addr,
4013 const u8 *enc, size_t enc_len,
4014 const u8 *auth, size_t auth_len,
4015 int no_defer)
4016 {
4017 int ret = -1;
4018 struct ft_rrb_seq f_seq;
4019 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id;
4020 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len;
4021 struct ft_remote_seq *rkh_seq = NULL;
4022 u8 *packet = NULL, *key = NULL;
4023 size_t packet_len = 0, key_len = 0;
4024 struct tlv_list seq_resp_auth[5];
4025
4026 wpa_printf(MSG_DEBUG, "FT: Received sequence number request");
4027
4028 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
4029 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4030 &key_len, NULL, NULL, NULL, NULL) < 0)
4031 goto out;
4032
4033 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq request", FT_RRB_NONCE_LEN);
4034 wpa_hexdump(MSG_DEBUG, "FT: seq request - nonce", f_nonce, f_nonce_len);
4035
4036 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4037 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4038
4039 if (wpa_ft_new_seq(rkh_seq, &f_seq) < 0) {
4040 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4041 goto out;
4042 }
4043
4044 seq_resp_auth[0].type = FT_RRB_NONCE;
4045 seq_resp_auth[0].len = f_nonce_len;
4046 seq_resp_auth[0].data = f_nonce;
4047 seq_resp_auth[1].type = FT_RRB_SEQ;
4048 seq_resp_auth[1].len = sizeof(f_seq);
4049 seq_resp_auth[1].data = (u8 *) &f_seq;
4050 seq_resp_auth[2].type = FT_RRB_R0KH_ID;
4051 seq_resp_auth[2].len = f_r0kh_id_len;
4052 seq_resp_auth[2].data = f_r0kh_id;
4053 seq_resp_auth[3].type = FT_RRB_R1KH_ID;
4054 seq_resp_auth[3].len = FT_R1KH_ID_LEN;
4055 seq_resp_auth[3].data = f_r1kh_id;
4056 seq_resp_auth[4].type = FT_RRB_LAST_EMPTY;
4057 seq_resp_auth[4].len = 0;
4058 seq_resp_auth[4].data = NULL;
4059
4060 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_resp_auth, NULL,
4061 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4062 &packet, &packet_len) < 0)
4063 goto out;
4064
4065 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
4066 FT_PACKET_R0KH_R1KH_SEQ_RESP, packet,
4067 packet_len);
4068
4069 out:
4070 os_free(packet);
4071
4072 return ret;
4073 }
4074
4075
4076 static int wpa_ft_rrb_rx_seq_resp(struct wpa_authenticator *wpa_auth,
4077 const u8 *src_addr,
4078 const u8 *enc, size_t enc_len,
4079 const u8 *auth, size_t auth_len,
4080 int no_defer)
4081 {
4082 u8 *key = NULL;
4083 size_t key_len = 0;
4084 struct ft_remote_r0kh *r0kh = NULL, *r0kh_wildcard = NULL;
4085 struct ft_remote_r1kh *r1kh = NULL, *r1kh_wildcard = NULL;
4086 const u8 *f_nonce, *f_seq;
4087 size_t f_nonce_len, f_seq_len;
4088 struct ft_remote_seq *rkh_seq = NULL;
4089 struct ft_remote_item *item;
4090 struct os_reltime now, now_remote;
4091 int seq_ret, found;
4092 const struct ft_rrb_seq *msg_both;
4093 u32 msg_dom, msg_seq;
4094
4095 wpa_printf(MSG_DEBUG, "FT: Received sequence number response");
4096
4097 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4098 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4099 &key_len, &r0kh, &r1kh, &r0kh_wildcard,
4100 &r1kh_wildcard) < 0)
4101 goto out;
4102
4103 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq response", FT_RRB_NONCE_LEN);
4104 wpa_hexdump(MSG_DEBUG, "FT: seq response - nonce", f_nonce,
4105 f_nonce_len);
4106
4107 found = 0;
4108 dl_list_for_each(item, &rkh_seq->rx.queue, struct ft_remote_item,
4109 list) {
4110 if (os_memcmp_const(f_nonce, item->nonce,
4111 FT_RRB_NONCE_LEN) != 0 ||
4112 os_get_reltime(&now) < 0 ||
4113 os_reltime_expired(&now, &item->nonce_ts, ftRRBseqTimeout))
4114 continue;
4115
4116 found = 1;
4117 break;
4118 }
4119 if (!found) {
4120 wpa_printf(MSG_DEBUG, "FT: seq response - bad nonce");
4121 goto out;
4122 }
4123
4124 if (r0kh) {
4125 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
4126 wpa_auth->conf.rkh_pos_timeout);
4127 if (r0kh_wildcard)
4128 os_memcpy(r0kh->addr, src_addr, ETH_ALEN);
4129 }
4130
4131 if (r1kh) {
4132 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
4133 wpa_auth->conf.rkh_pos_timeout);
4134 if (r1kh_wildcard)
4135 os_memcpy(r1kh->addr, src_addr, ETH_ALEN);
4136 }
4137
4138 seq_ret = wpa_ft_rrb_seq_chk(rkh_seq, src_addr, enc, enc_len, auth,
4139 auth_len, "seq response", 1);
4140 if (seq_ret == FT_RRB_SEQ_OK) {
4141 wpa_printf(MSG_DEBUG, "FT: seq response - valid seq number");
4142 wpa_ft_rrb_seq_accept(wpa_auth, rkh_seq, src_addr, auth,
4143 auth_len, "seq response");
4144 } else {
4145 wpa_printf(MSG_DEBUG, "FT: seq response - reset seq number");
4146
4147 RRB_GET_AUTH(FT_RRB_SEQ, seq, "seq response",
4148 sizeof(*msg_both));
4149 msg_both = (const struct ft_rrb_seq *) f_seq;
4150
4151 msg_dom = le_to_host32(msg_both->dom);
4152 msg_seq = le_to_host32(msg_both->seq);
4153 now_remote.sec = le_to_host32(msg_both->ts);
4154 now_remote.usec = 0;
4155
4156 rkh_seq->rx.num_last = 2;
4157 rkh_seq->rx.dom = msg_dom;
4158 rkh_seq->rx.offsetidx = 0;
4159 /* Accept some older, possibly cached packets as well */
4160 rkh_seq->rx.last[0] = msg_seq - FT_REMOTE_SEQ_BACKLOG -
4161 dl_list_len(&rkh_seq->rx.queue);
4162 rkh_seq->rx.last[1] = msg_seq;
4163
4164 /* local time - offset = remote time
4165 * <=> local time - remote time = offset */
4166 os_reltime_sub(&now, &now_remote, &rkh_seq->rx.time_offset);
4167 }
4168
4169 wpa_ft_rrb_seq_flush(wpa_auth, rkh_seq, 1);
4170
4171 return 0;
4172 out:
4173 return -1;
4174 }
4175
4176
4177 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4178 const u8 *data, size_t data_len)
4179 {
4180 struct ft_rrb_frame *frame;
4181 u16 alen;
4182 const u8 *pos, *end, *start;
4183 u8 action;
4184 const u8 *sta_addr, *target_ap_addr;
4185
4186 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
4187 MAC2STR(src_addr));
4188
4189 if (data_len < sizeof(*frame)) {
4190 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
4191 (unsigned long) data_len);
4192 return -1;
4193 }
4194
4195 pos = data;
4196 frame = (struct ft_rrb_frame *) pos;
4197 pos += sizeof(*frame);
4198
4199 alen = le_to_host16(frame->action_length);
4200 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
4201 "action_length=%d ap_address=" MACSTR,
4202 frame->frame_type, frame->packet_type, alen,
4203 MAC2STR(frame->ap_address));
4204
4205 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
4206 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
4207 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
4208 "unrecognized type %d", frame->frame_type);
4209 return -1;
4210 }
4211
4212 if (alen > data_len - sizeof(*frame)) {
4213 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
4214 "frame");
4215 return -1;
4216 }
4217
4218 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
4219
4220 if (alen < 1 + 1 + 2 * ETH_ALEN) {
4221 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
4222 "room for Action Frame body); alen=%lu",
4223 (unsigned long) alen);
4224 return -1;
4225 }
4226 start = pos;
4227 end = pos + alen;
4228
4229 if (*pos != WLAN_ACTION_FT) {
4230 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
4231 "%d", *pos);
4232 return -1;
4233 }
4234
4235 pos++;
4236 action = *pos++;
4237 sta_addr = pos;
4238 pos += ETH_ALEN;
4239 target_ap_addr = pos;
4240 pos += ETH_ALEN;
4241 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
4242 MACSTR " target_ap_addr=" MACSTR,
4243 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
4244
4245 if (frame->packet_type == FT_PACKET_REQUEST) {
4246 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
4247
4248 if (action != 1) {
4249 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
4250 "RRB Request", action);
4251 return -1;
4252 }
4253
4254 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
4255 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
4256 "RRB Request does not match with own "
4257 "address");
4258 return -1;
4259 }
4260
4261 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
4262 sta_addr, pos, end - pos) < 0)
4263 return -1;
4264 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
4265 u16 status_code;
4266
4267 if (end - pos < 2) {
4268 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
4269 "code in RRB Response");
4270 return -1;
4271 }
4272 status_code = WPA_GET_LE16(pos);
4273 pos += 2;
4274
4275 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
4276 "(status_code=%d)", status_code);
4277
4278 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
4279 return -1;
4280 } else {
4281 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
4282 "packet_type %d", frame->packet_type);
4283 return -1;
4284 }
4285
4286 if (end > pos) {
4287 wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end",
4288 pos, end - pos);
4289 }
4290
4291 return 0;
4292 }
4293
4294
4295 void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4296 const u8 *dst_addr, u8 oui_suffix, const u8 *data,
4297 size_t data_len)
4298 {
4299 const u8 *auth, *enc;
4300 size_t alen, elen;
4301 int no_defer = 0;
4302
4303 wpa_printf(MSG_DEBUG, "FT: RRB-OUI received frame from remote AP "
4304 MACSTR, MAC2STR(src_addr));
4305 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame - oui_suffix=%d", oui_suffix);
4306
4307 if (is_multicast_ether_addr(src_addr)) {
4308 wpa_printf(MSG_DEBUG,
4309 "FT: RRB-OUI received frame from multicast address "
4310 MACSTR, MAC2STR(src_addr));
4311 return;
4312 }
4313
4314 if (is_multicast_ether_addr(dst_addr)) {
4315 wpa_printf(MSG_DEBUG,
4316 "FT: RRB-OUI received frame from remote AP " MACSTR
4317 " to multicast address " MACSTR,
4318 MAC2STR(src_addr), MAC2STR(dst_addr));
4319 no_defer = 1;
4320 }
4321
4322 if (data_len < sizeof(u16)) {
4323 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4324 return;
4325 }
4326
4327 alen = WPA_GET_LE16(data);
4328 if (data_len < sizeof(u16) + alen) {
4329 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4330 return;
4331 }
4332
4333 auth = data + sizeof(u16);
4334 enc = data + sizeof(u16) + alen;
4335 elen = data_len - sizeof(u16) - alen;
4336
4337 switch (oui_suffix) {
4338 case FT_PACKET_R0KH_R1KH_PULL:
4339 wpa_ft_rrb_rx_pull(wpa_auth, src_addr, enc, elen, auth, alen,
4340 no_defer);
4341 break;
4342 case FT_PACKET_R0KH_R1KH_RESP:
4343 wpa_ft_rrb_rx_resp(wpa_auth, src_addr, enc, elen, auth, alen,
4344 no_defer);
4345 break;
4346 case FT_PACKET_R0KH_R1KH_PUSH:
4347 wpa_ft_rrb_rx_push(wpa_auth, src_addr, enc, elen, auth, alen,
4348 no_defer);
4349 break;
4350 case FT_PACKET_R0KH_R1KH_SEQ_REQ:
4351 wpa_ft_rrb_rx_seq_req(wpa_auth, src_addr, enc, elen, auth, alen,
4352 no_defer);
4353 break;
4354 case FT_PACKET_R0KH_R1KH_SEQ_RESP:
4355 wpa_ft_rrb_rx_seq_resp(wpa_auth, src_addr, enc, elen, auth,
4356 alen, no_defer);
4357 break;
4358 }
4359 }
4360
4361
4362 static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
4363 struct wpa_ft_pmk_r0_sa *pmk_r0,
4364 struct ft_remote_r1kh *r1kh,
4365 const u8 *s1kh_id)
4366 {
4367 u8 *packet;
4368 size_t packet_len;
4369 struct ft_rrb_seq f_seq;
4370 struct tlv_list push[] = {
4371 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
4372 .data = s1kh_id },
4373 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
4374 .data = pmk_r0->pmk_r0_name },
4375 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4376 };
4377 struct tlv_list push_auth[] = {
4378 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
4379 .data = (u8 *) &f_seq },
4380 { .type = FT_RRB_R0KH_ID,
4381 .len = wpa_auth->conf.r0_key_holder_len,
4382 .data = wpa_auth->conf.r0_key_holder },
4383 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
4384 .data = r1kh->id },
4385 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4386 };
4387
4388 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
4389 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4390 return -1;
4391 }
4392
4393 if (wpa_ft_rrb_build_r0(r1kh->key, sizeof(r1kh->key), push, pmk_r0,
4394 r1kh->id, s1kh_id, push_auth, wpa_auth->addr,
4395 FT_PACKET_R0KH_R1KH_PUSH,
4396 &packet, &packet_len) < 0)
4397 return -1;
4398
4399 wpa_ft_rrb_oui_send(wpa_auth, r1kh->addr, FT_PACKET_R0KH_R1KH_PUSH,
4400 packet, packet_len);
4401
4402 os_free(packet);
4403 return 0;
4404 }
4405
4406
4407 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
4408 {
4409 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
4410 struct wpa_ft_pmk_r0_sa *r0, *r0found = NULL;
4411 struct ft_remote_r1kh *r1kh;
4412
4413 if (!wpa_auth->conf.pmk_r1_push)
4414 return;
4415 if (!wpa_auth->conf.r1kh_list)
4416 return;
4417
4418 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
4419 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) {
4420 r0found = r0;
4421 break;
4422 }
4423 }
4424
4425 r0 = r0found;
4426 if (r0 == NULL || r0->pmk_r1_pushed)
4427 return;
4428 r0->pmk_r1_pushed = 1;
4429
4430 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
4431 "for STA " MACSTR, MAC2STR(addr));
4432
4433 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
4434 if (is_zero_ether_addr(r1kh->addr) ||
4435 is_zero_ether_addr(r1kh->id))
4436 continue;
4437 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
4438 continue;
4439 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
4440 }
4441 }
4442
4443 #endif /* CONFIG_IEEE80211R_AP */
Unnamed repository; edit this file 'description' to name the repository.