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FT: Verify that RSNXE is used consistently in Reassociation Request
[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 "common/ocv.h"
17 #include "drivers/driver.h"
18 #include "crypto/aes.h"
19 #include "crypto/aes_siv.h"
20 #include "crypto/aes_wrap.h"
21 #include "crypto/sha384.h"
22 #include "crypto/random.h"
23 #include "ap_config.h"
24 #include "ieee802_11.h"
25 #include "wmm.h"
26 #include "wpa_auth.h"
27 #include "wpa_auth_i.h"
28 #include "pmksa_cache_auth.h"
29
30
31 #ifdef CONFIG_IEEE80211R_AP
32
33 const unsigned int ftRRBseqTimeout = 10;
34 const unsigned int ftRRBmaxQueueLen = 100;
35
36
37 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
38 const u8 *current_ap, const u8 *sta_addr,
39 u16 status, const u8 *resp_ies,
40 size_t resp_ies_len);
41 static void ft_finish_pull(struct wpa_state_machine *sm);
42 static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx);
43 static void wpa_ft_rrb_seq_timeout(void *eloop_ctx, void *timeout_ctx);
44
45 struct tlv_list {
46 u16 type;
47 size_t len;
48 const u8 *data;
49 };
50
51
52 /**
53 * wpa_ft_rrb_decrypt - Decrypt FT RRB message
54 * @key: AES-SIV key for AEAD
55 * @key_len: Length of key in octets
56 * @enc: Pointer to encrypted TLVs
57 * @enc_len: Length of encrypted TLVs in octets
58 * @auth: Pointer to authenticated TLVs
59 * @auth_len: Length of authenticated TLVs in octets
60 * @src_addr: MAC address of the frame sender
61 * @type: Vendor-specific subtype of the RRB frame (FT_PACKET_*)
62 * @plain: Pointer to return the pointer to the allocated plaintext buffer;
63 * needs to be freed by the caller if not NULL;
64 * will only be returned on success
65 * @plain_len: Pointer to return the length of the allocated plaintext buffer
66 * in octets
67 * Returns: 0 on success, -1 on error
68 */
69 static int wpa_ft_rrb_decrypt(const u8 *key, const size_t key_len,
70 const u8 *enc, size_t enc_len,
71 const u8 *auth, const size_t auth_len,
72 const u8 *src_addr, u8 type,
73 u8 **plain, size_t *plain_size)
74 {
75 const u8 *ad[3] = { src_addr, auth, &type };
76 size_t ad_len[3] = { ETH_ALEN, auth_len, sizeof(type) };
77
78 wpa_printf(MSG_DEBUG, "FT(RRB): src_addr=" MACSTR " type=%u",
79 MAC2STR(src_addr), type);
80 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): decrypt using key", key, key_len);
81 wpa_hexdump(MSG_DEBUG, "FT(RRB): encrypted TLVs", enc, enc_len);
82 wpa_hexdump(MSG_DEBUG, "FT(RRB): authenticated TLVs", auth, auth_len);
83
84 if (!key) { /* skip decryption */
85 *plain = os_memdup(enc, enc_len);
86 if (enc_len > 0 && !*plain)
87 goto err;
88
89 *plain_size = enc_len;
90
91 return 0;
92 }
93
94 *plain = NULL;
95
96 /* SIV overhead */
97 if (enc_len < AES_BLOCK_SIZE)
98 goto err;
99
100 *plain = os_zalloc(enc_len - AES_BLOCK_SIZE);
101 if (!*plain)
102 goto err;
103
104 if (aes_siv_decrypt(key, key_len, enc, enc_len, 3, ad, ad_len,
105 *plain) < 0) {
106 if (enc_len < AES_BLOCK_SIZE + 2)
107 goto err;
108
109 /* Try to work around Ethernet devices that add extra
110 * two octet padding even if the frame is longer than
111 * the minimum Ethernet frame. */
112 enc_len -= 2;
113 if (aes_siv_decrypt(key, key_len, enc, enc_len, 3, ad, ad_len,
114 *plain) < 0)
115 goto err;
116 }
117
118 *plain_size = enc_len - AES_BLOCK_SIZE;
119 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): decrypted TLVs",
120 *plain, *plain_size);
121 return 0;
122 err:
123 os_free(*plain);
124 *plain = NULL;
125 *plain_size = 0;
126
127 wpa_printf(MSG_ERROR, "FT(RRB): Failed to decrypt");
128
129 return -1;
130 }
131
132
133 /* get first tlv record in packet matching type
134 * @data (decrypted) packet
135 * @return 0 on success else -1
136 */
137 static int wpa_ft_rrb_get_tlv(const u8 *plain, size_t plain_len,
138 u16 type, size_t *tlv_len, const u8 **tlv_data)
139 {
140 const struct ft_rrb_tlv *f;
141 size_t left;
142 le16 type16;
143 size_t len;
144
145 left = plain_len;
146 type16 = host_to_le16(type);
147
148 while (left >= sizeof(*f)) {
149 f = (const struct ft_rrb_tlv *) plain;
150
151 left -= sizeof(*f);
152 plain += sizeof(*f);
153 len = le_to_host16(f->len);
154
155 if (left < len) {
156 wpa_printf(MSG_DEBUG, "FT: RRB message truncated");
157 break;
158 }
159
160 if (f->type == type16) {
161 *tlv_len = len;
162 *tlv_data = plain;
163 return 0;
164 }
165
166 left -= len;
167 plain += len;
168 }
169
170 return -1;
171 }
172
173
174 static void wpa_ft_rrb_dump(const u8 *plain, const size_t plain_len)
175 {
176 const struct ft_rrb_tlv *f;
177 size_t left;
178 size_t len;
179
180 left = plain_len;
181
182 wpa_printf(MSG_DEBUG, "FT: RRB dump message");
183 while (left >= sizeof(*f)) {
184 f = (const struct ft_rrb_tlv *) plain;
185
186 left -= sizeof(*f);
187 plain += sizeof(*f);
188 len = le_to_host16(f->len);
189
190 wpa_printf(MSG_DEBUG, "FT: RRB TLV type = %d, len = %zu",
191 le_to_host16(f->type), len);
192
193 if (left < len) {
194 wpa_printf(MSG_DEBUG,
195 "FT: RRB message truncated: left %zu bytes, need %zu",
196 left, len);
197 break;
198 }
199
200 wpa_hexdump(MSG_DEBUG, "FT: RRB TLV data", plain, len);
201
202 left -= len;
203 plain += len;
204 }
205
206 if (left > 0)
207 wpa_hexdump(MSG_DEBUG, "FT: RRB TLV padding", plain, left);
208
209 wpa_printf(MSG_DEBUG, "FT: RRB dump message end");
210 }
211
212
213 static int cmp_int(const void *a, const void *b)
214 {
215 int x, y;
216
217 x = *((int *) a);
218 y = *((int *) b);
219 return x - y;
220 }
221
222
223 static int wpa_ft_rrb_get_tlv_vlan(const u8 *plain, const size_t plain_len,
224 struct vlan_description *vlan)
225 {
226 struct ft_rrb_tlv *f;
227 size_t left;
228 size_t len;
229 int taggedidx;
230 int vlan_id;
231 int type;
232
233 left = plain_len;
234 taggedidx = 0;
235 os_memset(vlan, 0, sizeof(*vlan));
236
237 while (left >= sizeof(*f)) {
238 f = (struct ft_rrb_tlv *) plain;
239
240 left -= sizeof(*f);
241 plain += sizeof(*f);
242
243 len = le_to_host16(f->len);
244 type = le_to_host16(f->type);
245
246 if (left < len) {
247 wpa_printf(MSG_DEBUG, "FT: RRB message truncated");
248 return -1;
249 }
250
251 if (type != FT_RRB_VLAN_UNTAGGED && type != FT_RRB_VLAN_TAGGED)
252 goto skip;
253
254 if (type == FT_RRB_VLAN_UNTAGGED && len != sizeof(le16)) {
255 wpa_printf(MSG_DEBUG,
256 "FT: RRB VLAN_UNTAGGED invalid length");
257 return -1;
258 }
259
260 if (type == FT_RRB_VLAN_TAGGED && len % sizeof(le16) != 0) {
261 wpa_printf(MSG_DEBUG,
262 "FT: RRB VLAN_TAGGED invalid length");
263 return -1;
264 }
265
266 while (len >= sizeof(le16)) {
267 vlan_id = WPA_GET_LE16(plain);
268 plain += sizeof(le16);
269 left -= sizeof(le16);
270 len -= sizeof(le16);
271
272 if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID) {
273 wpa_printf(MSG_DEBUG,
274 "FT: RRB VLAN ID invalid %d",
275 vlan_id);
276 continue;
277 }
278
279 if (type == FT_RRB_VLAN_UNTAGGED)
280 vlan->untagged = vlan_id;
281
282 if (type == FT_RRB_VLAN_TAGGED &&
283 taggedidx < MAX_NUM_TAGGED_VLAN) {
284 vlan->tagged[taggedidx] = vlan_id;
285 taggedidx++;
286 } else if (type == FT_RRB_VLAN_TAGGED) {
287 wpa_printf(MSG_DEBUG, "FT: RRB too many VLANs");
288 }
289 }
290
291 skip:
292 left -= len;
293 plain += len;
294 }
295
296 if (taggedidx)
297 qsort(vlan->tagged, taggedidx, sizeof(int), cmp_int);
298
299 vlan->notempty = vlan->untagged || vlan->tagged[0];
300
301 return 0;
302 }
303
304
305 static size_t wpa_ft_tlv_len(const struct tlv_list *tlvs)
306 {
307 size_t tlv_len = 0;
308 int i;
309
310 if (!tlvs)
311 return 0;
312
313 for (i = 0; tlvs[i].type != FT_RRB_LAST_EMPTY; i++) {
314 tlv_len += sizeof(struct ft_rrb_tlv);
315 tlv_len += tlvs[i].len;
316 }
317
318 return tlv_len;
319 }
320
321
322 static size_t wpa_ft_tlv_lin(const struct tlv_list *tlvs, u8 *start,
323 u8 *endpos)
324 {
325 int i;
326 size_t tlv_len;
327 struct ft_rrb_tlv *hdr;
328 u8 *pos;
329
330 if (!tlvs)
331 return 0;
332
333 tlv_len = 0;
334 pos = start;
335 for (i = 0; tlvs[i].type != FT_RRB_LAST_EMPTY; i++) {
336 if (tlv_len + sizeof(*hdr) > (size_t) (endpos - start))
337 return tlv_len;
338 tlv_len += sizeof(*hdr);
339 hdr = (struct ft_rrb_tlv *) pos;
340 hdr->type = host_to_le16(tlvs[i].type);
341 hdr->len = host_to_le16(tlvs[i].len);
342 pos = start + tlv_len;
343
344 if (tlv_len + tlvs[i].len > (size_t) (endpos - start))
345 return tlv_len;
346 if (tlvs[i].len == 0)
347 continue;
348 tlv_len += tlvs[i].len;
349 os_memcpy(pos, tlvs[i].data, tlvs[i].len);
350 pos = start + tlv_len;
351 }
352
353 return tlv_len;
354 }
355
356
357 static size_t wpa_ft_vlan_len(const struct vlan_description *vlan)
358 {
359 size_t tlv_len = 0;
360 int i;
361
362 if (!vlan || !vlan->notempty)
363 return 0;
364
365 if (vlan->untagged) {
366 tlv_len += sizeof(struct ft_rrb_tlv);
367 tlv_len += sizeof(le16);
368 }
369 if (vlan->tagged[0])
370 tlv_len += sizeof(struct ft_rrb_tlv);
371 for (i = 0; i < MAX_NUM_TAGGED_VLAN && vlan->tagged[i]; i++)
372 tlv_len += sizeof(le16);
373
374 return tlv_len;
375 }
376
377
378 static size_t wpa_ft_vlan_lin(const struct vlan_description *vlan,
379 u8 *start, u8 *endpos)
380 {
381 size_t tlv_len;
382 int i, len;
383 struct ft_rrb_tlv *hdr;
384 u8 *pos = start;
385
386 if (!vlan || !vlan->notempty)
387 return 0;
388
389 tlv_len = 0;
390 if (vlan->untagged) {
391 tlv_len += sizeof(*hdr);
392 if (start + tlv_len > endpos)
393 return tlv_len;
394 hdr = (struct ft_rrb_tlv *) pos;
395 hdr->type = host_to_le16(FT_RRB_VLAN_UNTAGGED);
396 hdr->len = host_to_le16(sizeof(le16));
397 pos = start + tlv_len;
398
399 tlv_len += sizeof(le16);
400 if (start + tlv_len > endpos)
401 return tlv_len;
402 WPA_PUT_LE16(pos, vlan->untagged);
403 pos = start + tlv_len;
404 }
405
406 if (!vlan->tagged[0])
407 return tlv_len;
408
409 tlv_len += sizeof(*hdr);
410 if (start + tlv_len > endpos)
411 return tlv_len;
412 hdr = (struct ft_rrb_tlv *) pos;
413 hdr->type = host_to_le16(FT_RRB_VLAN_TAGGED);
414 len = 0; /* len is computed below */
415 pos = start + tlv_len;
416
417 for (i = 0; i < MAX_NUM_TAGGED_VLAN && vlan->tagged[i]; i++) {
418 tlv_len += sizeof(le16);
419 if (start + tlv_len > endpos)
420 break;
421 len += sizeof(le16);
422 WPA_PUT_LE16(pos, vlan->tagged[i]);
423 pos = start + tlv_len;
424 }
425
426 hdr->len = host_to_le16(len);
427
428 return tlv_len;
429 }
430
431
432 static int wpa_ft_rrb_lin(const struct tlv_list *tlvs1,
433 const struct tlv_list *tlvs2,
434 const struct vlan_description *vlan,
435 u8 **plain, size_t *plain_len)
436 {
437 u8 *pos, *endpos;
438 size_t tlv_len;
439
440 tlv_len = wpa_ft_tlv_len(tlvs1);
441 tlv_len += wpa_ft_tlv_len(tlvs2);
442 tlv_len += wpa_ft_vlan_len(vlan);
443
444 *plain_len = tlv_len;
445 *plain = os_zalloc(tlv_len);
446 if (!*plain) {
447 wpa_printf(MSG_ERROR, "FT: Failed to allocate plaintext");
448 goto err;
449 }
450
451 pos = *plain;
452 endpos = *plain + tlv_len;
453 pos += wpa_ft_tlv_lin(tlvs1, pos, endpos);
454 pos += wpa_ft_tlv_lin(tlvs2, pos, endpos);
455 pos += wpa_ft_vlan_lin(vlan, pos, endpos);
456
457 /* sanity check */
458 if (pos != endpos) {
459 wpa_printf(MSG_ERROR, "FT: Length error building RRB");
460 goto err;
461 }
462
463 return 0;
464
465 err:
466 os_free(*plain);
467 *plain = NULL;
468 *plain_len = 0;
469 return -1;
470 }
471
472
473 static int wpa_ft_rrb_encrypt(const u8 *key, const size_t key_len,
474 const u8 *plain, const size_t plain_len,
475 const u8 *auth, const size_t auth_len,
476 const u8 *src_addr, u8 type, u8 *enc)
477 {
478 const u8 *ad[3] = { src_addr, auth, &type };
479 size_t ad_len[3] = { ETH_ALEN, auth_len, sizeof(type) };
480
481 wpa_printf(MSG_DEBUG, "FT(RRB): src_addr=" MACSTR " type=%u",
482 MAC2STR(src_addr), type);
483 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): plaintext message",
484 plain, plain_len);
485 wpa_hexdump_key(MSG_DEBUG, "FT(RRB): encrypt using key", key, key_len);
486 wpa_hexdump(MSG_DEBUG, "FT(RRB): authenticated TLVs", auth, auth_len);
487
488 if (!key) {
489 /* encryption not needed, return plaintext as packet */
490 os_memcpy(enc, plain, plain_len);
491 } else if (aes_siv_encrypt(key, key_len, plain, plain_len,
492 3, ad, ad_len, enc) < 0) {
493 wpa_printf(MSG_ERROR, "FT: Failed to encrypt RRB-OUI message");
494 return -1;
495 }
496 wpa_hexdump(MSG_DEBUG, "FT(RRB): encrypted TLVs",
497 enc, plain_len + AES_BLOCK_SIZE);
498
499 return 0;
500 }
501
502
503 /**
504 * wpa_ft_rrb_build - Build and encrypt an FT RRB message
505 * @key: AES-SIV key for AEAD
506 * @key_len: Length of key in octets
507 * @tlvs_enc0: First set of to-be-encrypted TLVs
508 * @tlvs_enc1: Second set of to-be-encrypted TLVs
509 * @tlvs_auth: Set of to-be-authenticated TLVs
510 * @src_addr: MAC address of the frame sender
511 * @type: Vendor-specific subtype of the RRB frame (FT_PACKET_*)
512 * @packet Pointer to return the pointer to the allocated packet buffer;
513 * needs to be freed by the caller if not null;
514 * will only be returned on success
515 * @packet_len: Pointer to return the length of the allocated buffer in octets
516 * Returns: 0 on success, -1 on error
517 */
518 static int wpa_ft_rrb_build(const u8 *key, const size_t key_len,
519 const struct tlv_list *tlvs_enc0,
520 const struct tlv_list *tlvs_enc1,
521 const struct tlv_list *tlvs_auth,
522 const struct vlan_description *vlan,
523 const u8 *src_addr, u8 type,
524 u8 **packet, size_t *packet_len)
525 {
526 u8 *plain = NULL, *auth = NULL, *pos, *tmp;
527 size_t plain_len = 0, auth_len = 0;
528 int ret = -1;
529 size_t pad_len = 0;
530
531 *packet = NULL;
532 if (wpa_ft_rrb_lin(tlvs_enc0, tlvs_enc1, vlan, &plain, &plain_len) < 0)
533 goto out;
534
535 if (wpa_ft_rrb_lin(tlvs_auth, NULL, NULL, &auth, &auth_len) < 0)
536 goto out;
537
538 *packet_len = sizeof(u16) + auth_len + plain_len;
539 if (key)
540 *packet_len += AES_BLOCK_SIZE;
541 #define RRB_MIN_MSG_LEN 64
542 if (*packet_len < RRB_MIN_MSG_LEN) {
543 pad_len = RRB_MIN_MSG_LEN - *packet_len;
544 if (pad_len < sizeof(struct ft_rrb_tlv))
545 pad_len = sizeof(struct ft_rrb_tlv);
546 wpa_printf(MSG_DEBUG,
547 "FT: Pad message to minimum Ethernet frame length (%d --> %d)",
548 (int) *packet_len, (int) (*packet_len + pad_len));
549 *packet_len += pad_len;
550 tmp = os_realloc(auth, auth_len + pad_len);
551 if (!tmp)
552 goto out;
553 auth = tmp;
554 pos = auth + auth_len;
555 WPA_PUT_LE16(pos, FT_RRB_LAST_EMPTY);
556 pos += 2;
557 WPA_PUT_LE16(pos, pad_len - sizeof(struct ft_rrb_tlv));
558 pos += 2;
559 os_memset(pos, 0, pad_len - sizeof(struct ft_rrb_tlv));
560 auth_len += pad_len;
561
562 }
563 *packet = os_zalloc(*packet_len);
564 if (!*packet)
565 goto out;
566
567 pos = *packet;
568 WPA_PUT_LE16(pos, auth_len);
569 pos += 2;
570 os_memcpy(pos, auth, auth_len);
571 pos += auth_len;
572 if (wpa_ft_rrb_encrypt(key, key_len, plain, plain_len, auth,
573 auth_len, src_addr, type, pos) < 0)
574 goto out;
575 wpa_hexdump(MSG_MSGDUMP, "FT: RRB frame payload", *packet, *packet_len);
576
577 ret = 0;
578
579 out:
580 bin_clear_free(plain, plain_len);
581 os_free(auth);
582
583 if (ret) {
584 wpa_printf(MSG_ERROR, "FT: Failed to build RRB-OUI message");
585 os_free(*packet);
586 *packet = NULL;
587 *packet_len = 0;
588 }
589
590 return ret;
591 }
592
593
594 #define RRB_GET_SRC(srcfield, type, field, txt, checklength) do { \
595 if (wpa_ft_rrb_get_tlv(srcfield, srcfield##_len, type, \
596 &f_##field##_len, &f_##field) < 0 || \
597 (checklength > 0 && ((size_t) checklength) != f_##field##_len)) { \
598 wpa_printf(MSG_INFO, "FT: Missing required " #field \
599 " in %s from " MACSTR, txt, MAC2STR(src_addr)); \
600 wpa_ft_rrb_dump(srcfield, srcfield##_len); \
601 goto out; \
602 } \
603 } while (0)
604
605 #define RRB_GET(type, field, txt, checklength) \
606 RRB_GET_SRC(plain, type, field, txt, checklength)
607 #define RRB_GET_AUTH(type, field, txt, checklength) \
608 RRB_GET_SRC(auth, type, field, txt, checklength)
609
610 #define RRB_GET_OPTIONAL_SRC(srcfield, type, field, txt, checklength) do { \
611 if (wpa_ft_rrb_get_tlv(srcfield, srcfield##_len, type, \
612 &f_##field##_len, &f_##field) < 0 || \
613 (checklength > 0 && ((size_t) checklength) != f_##field##_len)) { \
614 wpa_printf(MSG_DEBUG, "FT: Missing optional " #field \
615 " in %s from " MACSTR, txt, MAC2STR(src_addr)); \
616 f_##field##_len = 0; \
617 f_##field = NULL; \
618 } \
619 } while (0)
620
621 #define RRB_GET_OPTIONAL(type, field, txt, checklength) \
622 RRB_GET_OPTIONAL_SRC(plain, type, field, txt, checklength)
623 #define RRB_GET_OPTIONAL_AUTH(type, field, txt, checklength) \
624 RRB_GET_OPTIONAL_SRC(auth, type, field, txt, checklength)
625
626 static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
627 const u8 *data, size_t data_len)
628 {
629 if (wpa_auth->cb->send_ether == NULL)
630 return -1;
631 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
632 return wpa_auth->cb->send_ether(wpa_auth->cb_ctx, dst, ETH_P_RRB,
633 data, data_len);
634 }
635
636
637 static int wpa_ft_rrb_oui_send(struct wpa_authenticator *wpa_auth,
638 const u8 *dst, u8 oui_suffix,
639 const u8 *data, size_t data_len)
640 {
641 if (!wpa_auth->cb->send_oui)
642 return -1;
643 wpa_printf(MSG_DEBUG, "FT: RRB-OUI type %u send to " MACSTR " (len=%u)",
644 oui_suffix, MAC2STR(dst), (unsigned int) data_len);
645 return wpa_auth->cb->send_oui(wpa_auth->cb_ctx, dst, oui_suffix, data,
646 data_len);
647 }
648
649
650 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
651 const u8 *dst, const u8 *data, size_t data_len)
652 {
653 if (wpa_auth->cb->send_ft_action == NULL)
654 return -1;
655 return wpa_auth->cb->send_ft_action(wpa_auth->cb_ctx, dst,
656 data, data_len);
657 }
658
659
660 static const u8 * wpa_ft_get_psk(struct wpa_authenticator *wpa_auth,
661 const u8 *addr, const u8 *p2p_dev_addr,
662 const u8 *prev_psk)
663 {
664 if (wpa_auth->cb->get_psk == NULL)
665 return NULL;
666 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
667 prev_psk, NULL, NULL);
668 }
669
670
671 static struct wpa_state_machine *
672 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
673 {
674 if (wpa_auth->cb->add_sta == NULL)
675 return NULL;
676 return wpa_auth->cb->add_sta(wpa_auth->cb_ctx, sta_addr);
677 }
678
679
680 static int wpa_ft_set_vlan(struct wpa_authenticator *wpa_auth,
681 const u8 *sta_addr, struct vlan_description *vlan)
682 {
683 if (!wpa_auth->cb->set_vlan)
684 return -1;
685 return wpa_auth->cb->set_vlan(wpa_auth->cb_ctx, sta_addr, vlan);
686 }
687
688
689 static int wpa_ft_get_vlan(struct wpa_authenticator *wpa_auth,
690 const u8 *sta_addr, struct vlan_description *vlan)
691 {
692 if (!wpa_auth->cb->get_vlan)
693 return -1;
694 return wpa_auth->cb->get_vlan(wpa_auth->cb_ctx, sta_addr, vlan);
695 }
696
697
698 static int
699 wpa_ft_set_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
700 const u8 *identity, size_t identity_len)
701 {
702 if (!wpa_auth->cb->set_identity)
703 return -1;
704 return wpa_auth->cb->set_identity(wpa_auth->cb_ctx, sta_addr, identity,
705 identity_len);
706 }
707
708
709 static size_t
710 wpa_ft_get_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
711 const u8 **buf)
712 {
713 *buf = NULL;
714 if (!wpa_auth->cb->get_identity)
715 return 0;
716 return wpa_auth->cb->get_identity(wpa_auth->cb_ctx, sta_addr, buf);
717 }
718
719
720 static int
721 wpa_ft_set_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
722 const u8 *radius_cui, size_t radius_cui_len)
723 {
724 if (!wpa_auth->cb->set_radius_cui)
725 return -1;
726 return wpa_auth->cb->set_radius_cui(wpa_auth->cb_ctx, sta_addr,
727 radius_cui, radius_cui_len);
728 }
729
730
731 static size_t
732 wpa_ft_get_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
733 const u8 **buf)
734 {
735 *buf = NULL;
736 if (!wpa_auth->cb->get_radius_cui)
737 return 0;
738 return wpa_auth->cb->get_radius_cui(wpa_auth->cb_ctx, sta_addr, buf);
739 }
740
741
742 static void
743 wpa_ft_set_session_timeout(struct wpa_authenticator *wpa_auth,
744 const u8 *sta_addr, int session_timeout)
745 {
746 if (!wpa_auth->cb->set_session_timeout)
747 return;
748 wpa_auth->cb->set_session_timeout(wpa_auth->cb_ctx, sta_addr,
749 session_timeout);
750 }
751
752
753 static int
754 wpa_ft_get_session_timeout(struct wpa_authenticator *wpa_auth,
755 const u8 *sta_addr)
756 {
757 if (!wpa_auth->cb->get_session_timeout)
758 return 0;
759 return wpa_auth->cb->get_session_timeout(wpa_auth->cb_ctx, sta_addr);
760 }
761
762
763 static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
764 const u8 *sta_addr,
765 u8 *tspec_ie, size_t tspec_ielen)
766 {
767 if (wpa_auth->cb->add_tspec == NULL) {
768 wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized");
769 return -1;
770 }
771 return wpa_auth->cb->add_tspec(wpa_auth->cb_ctx, sta_addr, tspec_ie,
772 tspec_ielen);
773 }
774
775
776 #ifdef CONFIG_OCV
777 static int wpa_channel_info(struct wpa_authenticator *wpa_auth,
778 struct wpa_channel_info *ci)
779 {
780 if (!wpa_auth->cb->channel_info)
781 return -1;
782 return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci);
783 }
784 #endif /* CONFIG_OCV */
785
786
787 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
788 {
789 u8 *pos = buf;
790 u8 capab;
791 if (len < 2 + sizeof(struct rsn_mdie))
792 return -1;
793
794 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
795 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
796 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
797 pos += MOBILITY_DOMAIN_ID_LEN;
798 capab = 0;
799 if (conf->ft_over_ds)
800 capab |= RSN_FT_CAPAB_FT_OVER_DS;
801 *pos++ = capab;
802
803 return pos - buf;
804 }
805
806
807 int wpa_write_ftie(struct wpa_auth_config *conf, int use_sha384,
808 const u8 *r0kh_id, size_t r0kh_id_len,
809 const u8 *anonce, const u8 *snonce,
810 u8 *buf, size_t len, const u8 *subelem,
811 size_t subelem_len, int rsnxe_used)
812 {
813 u8 *pos = buf, *ielen;
814 size_t hdrlen = use_sha384 ? sizeof(struct rsn_ftie_sha384) :
815 sizeof(struct rsn_ftie);
816
817 if (len < 2 + hdrlen + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
818 subelem_len)
819 return -1;
820
821 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
822 ielen = pos++;
823
824 if (use_sha384) {
825 struct rsn_ftie_sha384 *hdr = (struct rsn_ftie_sha384 *) pos;
826
827 os_memset(hdr, 0, sizeof(*hdr));
828 pos += sizeof(*hdr);
829 WPA_PUT_LE16(hdr->mic_control, !!rsnxe_used);
830 if (anonce)
831 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
832 if (snonce)
833 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
834 } else {
835 struct rsn_ftie *hdr = (struct rsn_ftie *) pos;
836
837 os_memset(hdr, 0, sizeof(*hdr));
838 pos += sizeof(*hdr);
839 WPA_PUT_LE16(hdr->mic_control, !!rsnxe_used);
840 if (anonce)
841 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
842 if (snonce)
843 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
844 }
845
846 /* Optional Parameters */
847 *pos++ = FTIE_SUBELEM_R1KH_ID;
848 *pos++ = FT_R1KH_ID_LEN;
849 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
850 pos += FT_R1KH_ID_LEN;
851
852 if (r0kh_id) {
853 *pos++ = FTIE_SUBELEM_R0KH_ID;
854 *pos++ = r0kh_id_len;
855 os_memcpy(pos, r0kh_id, r0kh_id_len);
856 pos += r0kh_id_len;
857 }
858
859 if (subelem) {
860 os_memcpy(pos, subelem, subelem_len);
861 pos += subelem_len;
862 }
863
864 *ielen = pos - buf - 2;
865
866 return pos - buf;
867 }
868
869
870 /* A packet to be handled after seq response */
871 struct ft_remote_item {
872 struct dl_list list;
873
874 u8 nonce[FT_RRB_NONCE_LEN];
875 struct os_reltime nonce_ts;
876
877 u8 src_addr[ETH_ALEN];
878 u8 *enc;
879 size_t enc_len;
880 u8 *auth;
881 size_t auth_len;
882 int (*cb)(struct wpa_authenticator *wpa_auth,
883 const u8 *src_addr,
884 const u8 *enc, size_t enc_len,
885 const u8 *auth, size_t auth_len,
886 int no_defer);
887 };
888
889
890 static void wpa_ft_rrb_seq_free(struct ft_remote_item *item)
891 {
892 eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, ELOOP_ALL_CTX, item);
893 dl_list_del(&item->list);
894 bin_clear_free(item->enc, item->enc_len);
895 os_free(item->auth);
896 os_free(item);
897 }
898
899
900 static void wpa_ft_rrb_seq_flush(struct wpa_authenticator *wpa_auth,
901 struct ft_remote_seq *rkh_seq, int cb)
902 {
903 struct ft_remote_item *item, *n;
904
905 dl_list_for_each_safe(item, n, &rkh_seq->rx.queue,
906 struct ft_remote_item, list) {
907 if (cb && item->cb)
908 item->cb(wpa_auth, item->src_addr, item->enc,
909 item->enc_len, item->auth, item->auth_len, 1);
910 wpa_ft_rrb_seq_free(item);
911 }
912 }
913
914
915 static void wpa_ft_rrb_seq_timeout(void *eloop_ctx, void *timeout_ctx)
916 {
917 struct ft_remote_item *item = timeout_ctx;
918
919 wpa_ft_rrb_seq_free(item);
920 }
921
922
923 static int
924 wpa_ft_rrb_seq_req(struct wpa_authenticator *wpa_auth,
925 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
926 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
927 const u8 *f_r1kh_id, const u8 *key, size_t key_len,
928 const u8 *enc, size_t enc_len,
929 const u8 *auth, size_t auth_len,
930 int (*cb)(struct wpa_authenticator *wpa_auth,
931 const u8 *src_addr,
932 const u8 *enc, size_t enc_len,
933 const u8 *auth, size_t auth_len,
934 int no_defer))
935 {
936 struct ft_remote_item *item = NULL;
937 u8 *packet = NULL;
938 size_t packet_len;
939 struct tlv_list seq_req_auth[] = {
940 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
941 .data = NULL /* to be filled: item->nonce */ },
942 { .type = FT_RRB_R0KH_ID, .len = f_r0kh_id_len,
943 .data = f_r0kh_id },
944 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
945 .data = f_r1kh_id },
946 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
947 };
948
949 if (dl_list_len(&rkh_seq->rx.queue) >= ftRRBmaxQueueLen) {
950 wpa_printf(MSG_DEBUG, "FT: Sequence number queue too long");
951 goto err;
952 }
953
954 wpa_printf(MSG_DEBUG, "FT: Send sequence number request from " MACSTR
955 " to " MACSTR,
956 MAC2STR(wpa_auth->addr), MAC2STR(src_addr));
957 item = os_zalloc(sizeof(*item));
958 if (!item)
959 goto err;
960
961 os_memcpy(item->src_addr, src_addr, ETH_ALEN);
962 item->cb = cb;
963
964 if (random_get_bytes(item->nonce, FT_RRB_NONCE_LEN) < 0) {
965 wpa_printf(MSG_DEBUG, "FT: Seq num nonce: out of random bytes");
966 goto err;
967 }
968
969 if (os_get_reltime(&item->nonce_ts) < 0)
970 goto err;
971
972 if (enc && enc_len > 0) {
973 item->enc = os_memdup(enc, enc_len);
974 item->enc_len = enc_len;
975 if (!item->enc)
976 goto err;
977 }
978
979 if (auth && auth_len > 0) {
980 item->auth = os_memdup(auth, auth_len);
981 item->auth_len = auth_len;
982 if (!item->auth)
983 goto err;
984 }
985
986 eloop_register_timeout(ftRRBseqTimeout, 0, wpa_ft_rrb_seq_timeout,
987 wpa_auth, item);
988
989 seq_req_auth[0].data = item->nonce;
990
991 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_req_auth, NULL,
992 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
993 &packet, &packet_len) < 0) {
994 item = NULL; /* some other seq resp might still accept this */
995 goto err;
996 }
997
998 dl_list_add(&rkh_seq->rx.queue, &item->list);
999
1000 wpa_ft_rrb_oui_send(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
1001 packet, packet_len);
1002
1003 os_free(packet);
1004
1005 return 0;
1006 err:
1007 wpa_printf(MSG_DEBUG, "FT: Failed to send sequence number request");
1008 if (item) {
1009 os_free(item->auth);
1010 bin_clear_free(item->enc, item->enc_len);
1011 os_free(item);
1012 }
1013
1014 return -1;
1015 }
1016
1017
1018 #define FT_RRB_SEQ_OK 0
1019 #define FT_RRB_SEQ_DROP 1
1020 #define FT_RRB_SEQ_DEFER 2
1021
1022 static int
1023 wpa_ft_rrb_seq_chk(struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1024 const u8 *enc, size_t enc_len,
1025 const u8 *auth, size_t auth_len,
1026 const char *msgtype, int no_defer)
1027 {
1028 const u8 *f_seq;
1029 size_t f_seq_len;
1030 const struct ft_rrb_seq *msg_both;
1031 u32 msg_seq, msg_off, rkh_off;
1032 struct os_reltime now;
1033 unsigned int i;
1034
1035 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1036 wpa_hexdump(MSG_DEBUG, "FT: sequence number", f_seq, f_seq_len);
1037 msg_both = (const struct ft_rrb_seq *) f_seq;
1038
1039 if (rkh_seq->rx.num_last == 0) {
1040 /* first packet from remote */
1041 goto defer;
1042 }
1043
1044 if (le_to_host32(msg_both->dom) != rkh_seq->rx.dom) {
1045 /* remote might have rebooted */
1046 goto defer;
1047 }
1048
1049 if (os_get_reltime(&now) == 0) {
1050 u32 msg_ts_now_remote, msg_ts_off;
1051 struct os_reltime now_remote;
1052
1053 os_reltime_sub(&now, &rkh_seq->rx.time_offset, &now_remote);
1054 msg_ts_now_remote = now_remote.sec;
1055 msg_ts_off = le_to_host32(msg_both->ts) -
1056 (msg_ts_now_remote - ftRRBseqTimeout);
1057 if (msg_ts_off > 2 * ftRRBseqTimeout)
1058 goto defer;
1059 }
1060
1061 msg_seq = le_to_host32(msg_both->seq);
1062 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1063 msg_off = msg_seq - rkh_off;
1064 if (msg_off > 0xC0000000)
1065 goto out; /* too old message, drop it */
1066
1067 if (msg_off <= 0x40000000) {
1068 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1069 if (rkh_seq->rx.last[i] == msg_seq)
1070 goto out; /* duplicate message, drop it */
1071 }
1072
1073 return FT_RRB_SEQ_OK;
1074 }
1075
1076 defer:
1077 if (no_defer)
1078 goto out;
1079
1080 wpa_printf(MSG_DEBUG, "FT: Possibly invalid sequence number in %s from "
1081 MACSTR, msgtype, MAC2STR(src_addr));
1082
1083 return FT_RRB_SEQ_DEFER;
1084 out:
1085 wpa_printf(MSG_DEBUG, "FT: Invalid sequence number in %s from " MACSTR,
1086 msgtype, MAC2STR(src_addr));
1087
1088 return FT_RRB_SEQ_DROP;
1089 }
1090
1091
1092 static void
1093 wpa_ft_rrb_seq_accept(struct wpa_authenticator *wpa_auth,
1094 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1095 const u8 *auth, size_t auth_len,
1096 const char *msgtype)
1097 {
1098 const u8 *f_seq;
1099 size_t f_seq_len;
1100 const struct ft_rrb_seq *msg_both;
1101 u32 msg_seq, msg_off, min_off, rkh_off;
1102 int minidx = 0;
1103 unsigned int i;
1104
1105 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1106 msg_both = (const struct ft_rrb_seq *) f_seq;
1107
1108 msg_seq = le_to_host32(msg_both->seq);
1109
1110 if (rkh_seq->rx.num_last < FT_REMOTE_SEQ_BACKLOG) {
1111 rkh_seq->rx.last[rkh_seq->rx.num_last] = msg_seq;
1112 rkh_seq->rx.num_last++;
1113 return;
1114 }
1115
1116 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1117 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1118 msg_off = rkh_seq->rx.last[i] - rkh_off;
1119 min_off = rkh_seq->rx.last[minidx] - rkh_off;
1120 if (msg_off < min_off && i != rkh_seq->rx.offsetidx)
1121 minidx = i;
1122 }
1123 rkh_seq->rx.last[rkh_seq->rx.offsetidx] = msg_seq;
1124 rkh_seq->rx.offsetidx = minidx;
1125
1126 return;
1127 out:
1128 /* RRB_GET_AUTH should never fail here as
1129 * wpa_ft_rrb_seq_chk() verified FT_RRB_SEQ presence. */
1130 wpa_printf(MSG_ERROR, "FT: %s() failed", __func__);
1131 }
1132
1133
1134 static int wpa_ft_new_seq(struct ft_remote_seq *rkh_seq,
1135 struct ft_rrb_seq *f_seq)
1136 {
1137 struct os_reltime now;
1138
1139 if (os_get_reltime(&now) < 0)
1140 return -1;
1141
1142 if (!rkh_seq->tx.dom) {
1143 if (random_get_bytes((u8 *) &rkh_seq->tx.seq,
1144 sizeof(rkh_seq->tx.seq))) {
1145 wpa_printf(MSG_ERROR,
1146 "FT: Failed to get random data for sequence number initialization");
1147 rkh_seq->tx.seq = now.usec;
1148 }
1149 if (random_get_bytes((u8 *) &rkh_seq->tx.dom,
1150 sizeof(rkh_seq->tx.dom))) {
1151 wpa_printf(MSG_ERROR,
1152 "FT: Failed to get random data for sequence number initialization");
1153 rkh_seq->tx.dom = now.usec;
1154 }
1155 rkh_seq->tx.dom |= 1;
1156 }
1157
1158 f_seq->dom = host_to_le32(rkh_seq->tx.dom);
1159 f_seq->seq = host_to_le32(rkh_seq->tx.seq);
1160 f_seq->ts = host_to_le32(now.sec);
1161
1162 rkh_seq->tx.seq++;
1163
1164 return 0;
1165 }
1166
1167
1168 struct wpa_ft_pmk_r0_sa {
1169 struct dl_list list;
1170 u8 pmk_r0[PMK_LEN_MAX];
1171 size_t pmk_r0_len;
1172 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
1173 u8 spa[ETH_ALEN];
1174 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1175 struct vlan_description *vlan;
1176 os_time_t expiration; /* 0 for no expiration */
1177 u8 *identity;
1178 size_t identity_len;
1179 u8 *radius_cui;
1180 size_t radius_cui_len;
1181 os_time_t session_timeout; /* 0 for no expiration */
1182 /* TODO: radius_class, EAP type */
1183 int pmk_r1_pushed;
1184 };
1185
1186 struct wpa_ft_pmk_r1_sa {
1187 struct dl_list list;
1188 u8 pmk_r1[PMK_LEN_MAX];
1189 size_t pmk_r1_len;
1190 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
1191 u8 spa[ETH_ALEN];
1192 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1193 struct vlan_description *vlan;
1194 u8 *identity;
1195 size_t identity_len;
1196 u8 *radius_cui;
1197 size_t radius_cui_len;
1198 os_time_t session_timeout; /* 0 for no expiration */
1199 /* TODO: radius_class, EAP type */
1200 };
1201
1202 struct wpa_ft_pmk_cache {
1203 struct dl_list pmk_r0; /* struct wpa_ft_pmk_r0_sa */
1204 struct dl_list pmk_r1; /* struct wpa_ft_pmk_r1_sa */
1205 };
1206
1207
1208 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx);
1209 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx);
1210
1211
1212 static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0)
1213 {
1214 if (!r0)
1215 return;
1216
1217 dl_list_del(&r0->list);
1218 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1219
1220 os_memset(r0->pmk_r0, 0, PMK_LEN_MAX);
1221 os_free(r0->vlan);
1222 os_free(r0->identity);
1223 os_free(r0->radius_cui);
1224 os_free(r0);
1225 }
1226
1227
1228 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx)
1229 {
1230 struct wpa_ft_pmk_r0_sa *r0 = eloop_ctx;
1231 struct os_reltime now;
1232 int expires_in;
1233 int session_timeout;
1234
1235 os_get_reltime(&now);
1236
1237 if (!r0)
1238 return;
1239
1240 expires_in = r0->expiration - now.sec;
1241 session_timeout = r0->session_timeout - now.sec;
1242 /* conditions to remove from cache:
1243 * a) r0->expiration is set and hit
1244 * -or-
1245 * b) r0->session_timeout is set and hit
1246 */
1247 if ((!r0->expiration || expires_in > 0) &&
1248 (!r0->session_timeout || session_timeout > 0)) {
1249 wpa_printf(MSG_ERROR,
1250 "FT: %s() called for non-expired entry %p",
1251 __func__, r0);
1252 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1253 if (r0->expiration && expires_in > 0)
1254 eloop_register_timeout(expires_in + 1, 0,
1255 wpa_ft_expire_pmk_r0, r0, NULL);
1256 if (r0->session_timeout && session_timeout > 0)
1257 eloop_register_timeout(session_timeout + 1, 0,
1258 wpa_ft_expire_pmk_r0, r0, NULL);
1259 return;
1260 }
1261
1262 wpa_ft_free_pmk_r0(r0);
1263 }
1264
1265
1266 static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1)
1267 {
1268 if (!r1)
1269 return;
1270
1271 dl_list_del(&r1->list);
1272 eloop_cancel_timeout(wpa_ft_expire_pmk_r1, r1, NULL);
1273
1274 os_memset(r1->pmk_r1, 0, PMK_LEN_MAX);
1275 os_free(r1->vlan);
1276 os_free(r1->identity);
1277 os_free(r1->radius_cui);
1278 os_free(r1);
1279 }
1280
1281
1282 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx)
1283 {
1284 struct wpa_ft_pmk_r1_sa *r1 = eloop_ctx;
1285
1286 wpa_ft_free_pmk_r1(r1);
1287 }
1288
1289
1290 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
1291 {
1292 struct wpa_ft_pmk_cache *cache;
1293
1294 cache = os_zalloc(sizeof(*cache));
1295 if (cache) {
1296 dl_list_init(&cache->pmk_r0);
1297 dl_list_init(&cache->pmk_r1);
1298 }
1299
1300 return cache;
1301 }
1302
1303
1304 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
1305 {
1306 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
1307 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
1308
1309 dl_list_for_each_safe(r0, r0prev, &cache->pmk_r0,
1310 struct wpa_ft_pmk_r0_sa, list)
1311 wpa_ft_free_pmk_r0(r0);
1312
1313 dl_list_for_each_safe(r1, r1prev, &cache->pmk_r1,
1314 struct wpa_ft_pmk_r1_sa, list)
1315 wpa_ft_free_pmk_r1(r1);
1316
1317 os_free(cache);
1318 }
1319
1320
1321 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
1322 const u8 *spa, const u8 *pmk_r0,
1323 size_t pmk_r0_len,
1324 const u8 *pmk_r0_name, int pairwise,
1325 const struct vlan_description *vlan,
1326 int expires_in, int session_timeout,
1327 const u8 *identity, size_t identity_len,
1328 const u8 *radius_cui, size_t radius_cui_len)
1329 {
1330 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1331 struct wpa_ft_pmk_r0_sa *r0;
1332 struct os_reltime now;
1333
1334 /* TODO: add limit on number of entries in cache */
1335 os_get_reltime(&now);
1336
1337 r0 = os_zalloc(sizeof(*r0));
1338 if (r0 == NULL)
1339 return -1;
1340
1341 os_memcpy(r0->pmk_r0, pmk_r0, pmk_r0_len);
1342 r0->pmk_r0_len = pmk_r0_len;
1343 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
1344 os_memcpy(r0->spa, spa, ETH_ALEN);
1345 r0->pairwise = pairwise;
1346 if (expires_in > 0)
1347 r0->expiration = now.sec + expires_in;
1348 if (vlan && vlan->notempty) {
1349 r0->vlan = os_zalloc(sizeof(*vlan));
1350 if (!r0->vlan) {
1351 bin_clear_free(r0, sizeof(*r0));
1352 return -1;
1353 }
1354 *r0->vlan = *vlan;
1355 }
1356 if (identity) {
1357 r0->identity = os_malloc(identity_len);
1358 if (r0->identity) {
1359 os_memcpy(r0->identity, identity, identity_len);
1360 r0->identity_len = identity_len;
1361 }
1362 }
1363 if (radius_cui) {
1364 r0->radius_cui = os_malloc(radius_cui_len);
1365 if (r0->radius_cui) {
1366 os_memcpy(r0->radius_cui, radius_cui, radius_cui_len);
1367 r0->radius_cui_len = radius_cui_len;
1368 }
1369 }
1370 if (session_timeout > 0)
1371 r0->session_timeout = now.sec + session_timeout;
1372
1373 dl_list_add(&cache->pmk_r0, &r0->list);
1374 if (expires_in > 0)
1375 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r0,
1376 r0, NULL);
1377 if (session_timeout > 0)
1378 eloop_register_timeout(session_timeout + 1, 0,
1379 wpa_ft_expire_pmk_r0, r0, NULL);
1380
1381 return 0;
1382 }
1383
1384
1385 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
1386 const u8 *spa, const u8 *pmk_r0_name,
1387 const struct wpa_ft_pmk_r0_sa **r0_out)
1388 {
1389 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1390 struct wpa_ft_pmk_r0_sa *r0;
1391 struct os_reltime now;
1392
1393 os_get_reltime(&now);
1394 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
1395 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
1396 os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
1397 WPA_PMK_NAME_LEN) == 0) {
1398 *r0_out = r0;
1399 return 0;
1400 }
1401 }
1402
1403 *r0_out = NULL;
1404 return -1;
1405 }
1406
1407
1408 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
1409 const u8 *spa, const u8 *pmk_r1,
1410 size_t pmk_r1_len,
1411 const u8 *pmk_r1_name, int pairwise,
1412 const struct vlan_description *vlan,
1413 int expires_in, int session_timeout,
1414 const u8 *identity, size_t identity_len,
1415 const u8 *radius_cui, size_t radius_cui_len)
1416 {
1417 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1418 int max_expires_in = wpa_auth->conf.r1_max_key_lifetime;
1419 struct wpa_ft_pmk_r1_sa *r1;
1420 struct os_reltime now;
1421
1422 /* TODO: limit on number of entries in cache */
1423 os_get_reltime(&now);
1424
1425 if (max_expires_in && (max_expires_in < expires_in || expires_in == 0))
1426 expires_in = max_expires_in;
1427
1428 r1 = os_zalloc(sizeof(*r1));
1429 if (r1 == NULL)
1430 return -1;
1431
1432 os_memcpy(r1->pmk_r1, pmk_r1, pmk_r1_len);
1433 r1->pmk_r1_len = pmk_r1_len;
1434 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
1435 os_memcpy(r1->spa, spa, ETH_ALEN);
1436 r1->pairwise = pairwise;
1437 if (vlan && vlan->notempty) {
1438 r1->vlan = os_zalloc(sizeof(*vlan));
1439 if (!r1->vlan) {
1440 bin_clear_free(r1, sizeof(*r1));
1441 return -1;
1442 }
1443 *r1->vlan = *vlan;
1444 }
1445 if (identity) {
1446 r1->identity = os_malloc(identity_len);
1447 if (r1->identity) {
1448 os_memcpy(r1->identity, identity, identity_len);
1449 r1->identity_len = identity_len;
1450 }
1451 }
1452 if (radius_cui) {
1453 r1->radius_cui = os_malloc(radius_cui_len);
1454 if (r1->radius_cui) {
1455 os_memcpy(r1->radius_cui, radius_cui, radius_cui_len);
1456 r1->radius_cui_len = radius_cui_len;
1457 }
1458 }
1459 if (session_timeout > 0)
1460 r1->session_timeout = now.sec + session_timeout;
1461
1462 dl_list_add(&cache->pmk_r1, &r1->list);
1463
1464 if (expires_in > 0)
1465 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r1,
1466 r1, NULL);
1467 if (session_timeout > 0)
1468 eloop_register_timeout(session_timeout + 1, 0,
1469 wpa_ft_expire_pmk_r1, r1, NULL);
1470
1471 return 0;
1472 }
1473
1474
1475 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
1476 const u8 *spa, const u8 *pmk_r1_name,
1477 u8 *pmk_r1, size_t *pmk_r1_len, int *pairwise,
1478 struct vlan_description *vlan,
1479 const u8 **identity, size_t *identity_len,
1480 const u8 **radius_cui, size_t *radius_cui_len,
1481 int *session_timeout)
1482 {
1483 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1484 struct wpa_ft_pmk_r1_sa *r1;
1485 struct os_reltime now;
1486
1487 os_get_reltime(&now);
1488
1489 dl_list_for_each(r1, &cache->pmk_r1, struct wpa_ft_pmk_r1_sa, list) {
1490 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
1491 os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
1492 WPA_PMK_NAME_LEN) == 0) {
1493 os_memcpy(pmk_r1, r1->pmk_r1, r1->pmk_r1_len);
1494 *pmk_r1_len = r1->pmk_r1_len;
1495 if (pairwise)
1496 *pairwise = r1->pairwise;
1497 if (vlan && r1->vlan)
1498 *vlan = *r1->vlan;
1499 if (vlan && !r1->vlan)
1500 os_memset(vlan, 0, sizeof(*vlan));
1501 if (identity && identity_len) {
1502 *identity = r1->identity;
1503 *identity_len = r1->identity_len;
1504 }
1505 if (radius_cui && radius_cui_len) {
1506 *radius_cui = r1->radius_cui;
1507 *radius_cui_len = r1->radius_cui_len;
1508 }
1509 if (session_timeout && r1->session_timeout > now.sec)
1510 *session_timeout = r1->session_timeout -
1511 now.sec;
1512 else if (session_timeout && r1->session_timeout)
1513 *session_timeout = 1;
1514 else if (session_timeout)
1515 *session_timeout = 0;
1516 return 0;
1517 }
1518 }
1519
1520 return -1;
1521 }
1522
1523
1524 static int wpa_ft_rrb_init_r0kh_seq(struct ft_remote_r0kh *r0kh)
1525 {
1526 if (r0kh->seq)
1527 return 0;
1528
1529 r0kh->seq = os_zalloc(sizeof(*r0kh->seq));
1530 if (!r0kh->seq) {
1531 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r0kh->seq");
1532 return -1;
1533 }
1534
1535 dl_list_init(&r0kh->seq->rx.queue);
1536
1537 return 0;
1538 }
1539
1540
1541 static void wpa_ft_rrb_lookup_r0kh(struct wpa_authenticator *wpa_auth,
1542 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
1543 struct ft_remote_r0kh **r0kh_out,
1544 struct ft_remote_r0kh **r0kh_wildcard)
1545 {
1546 struct ft_remote_r0kh *r0kh;
1547
1548 *r0kh_wildcard = NULL;
1549 *r0kh_out = NULL;
1550
1551 if (wpa_auth->conf.r0kh_list)
1552 r0kh = *wpa_auth->conf.r0kh_list;
1553 else
1554 r0kh = NULL;
1555 for (; r0kh; r0kh = r0kh->next) {
1556 if (r0kh->id_len == 1 && r0kh->id[0] == '*')
1557 *r0kh_wildcard = r0kh;
1558 if (f_r0kh_id && r0kh->id_len == f_r0kh_id_len &&
1559 os_memcmp_const(f_r0kh_id, r0kh->id, f_r0kh_id_len) == 0)
1560 *r0kh_out = r0kh;
1561 }
1562
1563 if (!*r0kh_out && !*r0kh_wildcard)
1564 wpa_printf(MSG_DEBUG, "FT: No matching R0KH found");
1565
1566 if (*r0kh_out && wpa_ft_rrb_init_r0kh_seq(*r0kh_out) < 0)
1567 *r0kh_out = NULL;
1568 }
1569
1570
1571 static int wpa_ft_rrb_init_r1kh_seq(struct ft_remote_r1kh *r1kh)
1572 {
1573 if (r1kh->seq)
1574 return 0;
1575
1576 r1kh->seq = os_zalloc(sizeof(*r1kh->seq));
1577 if (!r1kh->seq) {
1578 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r1kh->seq");
1579 return -1;
1580 }
1581
1582 dl_list_init(&r1kh->seq->rx.queue);
1583
1584 return 0;
1585 }
1586
1587
1588 static void wpa_ft_rrb_lookup_r1kh(struct wpa_authenticator *wpa_auth,
1589 const u8 *f_r1kh_id,
1590 struct ft_remote_r1kh **r1kh_out,
1591 struct ft_remote_r1kh **r1kh_wildcard)
1592 {
1593 struct ft_remote_r1kh *r1kh;
1594
1595 *r1kh_wildcard = NULL;
1596 *r1kh_out = NULL;
1597
1598 if (wpa_auth->conf.r1kh_list)
1599 r1kh = *wpa_auth->conf.r1kh_list;
1600 else
1601 r1kh = NULL;
1602 for (; r1kh; r1kh = r1kh->next) {
1603 if (is_zero_ether_addr(r1kh->addr) &&
1604 is_zero_ether_addr(r1kh->id))
1605 *r1kh_wildcard = r1kh;
1606 if (f_r1kh_id &&
1607 os_memcmp_const(r1kh->id, f_r1kh_id, FT_R1KH_ID_LEN) == 0)
1608 *r1kh_out = r1kh;
1609 }
1610
1611 if (!*r1kh_out && !*r1kh_wildcard)
1612 wpa_printf(MSG_DEBUG, "FT: No matching R1KH found");
1613
1614 if (*r1kh_out && wpa_ft_rrb_init_r1kh_seq(*r1kh_out) < 0)
1615 *r1kh_out = NULL;
1616 }
1617
1618
1619 static int wpa_ft_rrb_check_r0kh(struct wpa_authenticator *wpa_auth,
1620 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1621 {
1622 if (f_r0kh_id_len != wpa_auth->conf.r0_key_holder_len ||
1623 os_memcmp_const(f_r0kh_id, wpa_auth->conf.r0_key_holder,
1624 f_r0kh_id_len) != 0)
1625 return -1;
1626
1627 return 0;
1628 }
1629
1630
1631 static int wpa_ft_rrb_check_r1kh(struct wpa_authenticator *wpa_auth,
1632 const u8 *f_r1kh_id)
1633 {
1634 if (os_memcmp_const(f_r1kh_id, wpa_auth->conf.r1_key_holder,
1635 FT_R1KH_ID_LEN) != 0)
1636 return -1;
1637
1638 return 0;
1639 }
1640
1641
1642 static void wpa_ft_rrb_del_r0kh(void *eloop_ctx, void *timeout_ctx)
1643 {
1644 struct wpa_authenticator *wpa_auth = eloop_ctx;
1645 struct ft_remote_r0kh *r0kh, *prev = NULL;
1646
1647 if (!wpa_auth->conf.r0kh_list)
1648 return;
1649
1650 for (r0kh = *wpa_auth->conf.r0kh_list; r0kh; r0kh = r0kh->next) {
1651 if (r0kh == timeout_ctx)
1652 break;
1653 prev = r0kh;
1654 }
1655 if (!r0kh)
1656 return;
1657 if (prev)
1658 prev->next = r0kh->next;
1659 else
1660 *wpa_auth->conf.r0kh_list = r0kh->next;
1661 if (r0kh->seq)
1662 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1663 os_free(r0kh->seq);
1664 os_free(r0kh);
1665 }
1666
1667
1668 static void wpa_ft_rrb_r0kh_replenish(struct wpa_authenticator *wpa_auth,
1669 struct ft_remote_r0kh *r0kh, int timeout)
1670 {
1671 if (timeout > 0)
1672 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1673 wpa_auth, r0kh);
1674 }
1675
1676
1677 static void wpa_ft_rrb_r0kh_timeout(struct wpa_authenticator *wpa_auth,
1678 struct ft_remote_r0kh *r0kh, int timeout)
1679 {
1680 eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth, r0kh);
1681
1682 if (timeout > 0)
1683 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1684 wpa_auth, r0kh);
1685 }
1686
1687
1688 static struct ft_remote_r0kh *
1689 wpa_ft_rrb_add_r0kh(struct wpa_authenticator *wpa_auth,
1690 struct ft_remote_r0kh *r0kh_wildcard,
1691 const u8 *src_addr, const u8 *r0kh_id, size_t id_len,
1692 int timeout)
1693 {
1694 struct ft_remote_r0kh *r0kh;
1695
1696 if (!wpa_auth->conf.r0kh_list)
1697 return NULL;
1698
1699 r0kh = os_zalloc(sizeof(*r0kh));
1700 if (!r0kh)
1701 return NULL;
1702
1703 if (src_addr)
1704 os_memcpy(r0kh->addr, src_addr, sizeof(r0kh->addr));
1705
1706 if (id_len > FT_R0KH_ID_MAX_LEN)
1707 id_len = FT_R0KH_ID_MAX_LEN;
1708 os_memcpy(r0kh->id, r0kh_id, id_len);
1709 r0kh->id_len = id_len;
1710
1711 os_memcpy(r0kh->key, r0kh_wildcard->key, sizeof(r0kh->key));
1712
1713 r0kh->next = *wpa_auth->conf.r0kh_list;
1714 *wpa_auth->conf.r0kh_list = r0kh;
1715
1716 if (timeout > 0)
1717 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1718 wpa_auth, r0kh);
1719
1720 if (wpa_ft_rrb_init_r0kh_seq(r0kh) < 0)
1721 return NULL;
1722
1723 return r0kh;
1724 }
1725
1726
1727 static void wpa_ft_rrb_del_r1kh(void *eloop_ctx, void *timeout_ctx)
1728 {
1729 struct wpa_authenticator *wpa_auth = eloop_ctx;
1730 struct ft_remote_r1kh *r1kh, *prev = NULL;
1731
1732 if (!wpa_auth->conf.r1kh_list)
1733 return;
1734
1735 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
1736 if (r1kh == timeout_ctx)
1737 break;
1738 prev = r1kh;
1739 }
1740 if (!r1kh)
1741 return;
1742 if (prev)
1743 prev->next = r1kh->next;
1744 else
1745 *wpa_auth->conf.r1kh_list = r1kh->next;
1746 if (r1kh->seq)
1747 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1748 os_free(r1kh->seq);
1749 os_free(r1kh);
1750 }
1751
1752
1753 static void wpa_ft_rrb_r1kh_replenish(struct wpa_authenticator *wpa_auth,
1754 struct ft_remote_r1kh *r1kh, int timeout)
1755 {
1756 if (timeout > 0)
1757 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1758 wpa_auth, r1kh);
1759 }
1760
1761
1762 static struct ft_remote_r1kh *
1763 wpa_ft_rrb_add_r1kh(struct wpa_authenticator *wpa_auth,
1764 struct ft_remote_r1kh *r1kh_wildcard,
1765 const u8 *src_addr, const u8 *r1kh_id, int timeout)
1766 {
1767 struct ft_remote_r1kh *r1kh;
1768
1769 if (!wpa_auth->conf.r1kh_list)
1770 return NULL;
1771
1772 r1kh = os_zalloc(sizeof(*r1kh));
1773 if (!r1kh)
1774 return NULL;
1775
1776 os_memcpy(r1kh->addr, src_addr, sizeof(r1kh->addr));
1777 os_memcpy(r1kh->id, r1kh_id, sizeof(r1kh->id));
1778 os_memcpy(r1kh->key, r1kh_wildcard->key, sizeof(r1kh->key));
1779 r1kh->next = *wpa_auth->conf.r1kh_list;
1780 *wpa_auth->conf.r1kh_list = r1kh;
1781
1782 if (timeout > 0)
1783 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1784 wpa_auth, r1kh);
1785
1786 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
1787 return NULL;
1788
1789 return r1kh;
1790 }
1791
1792
1793 void wpa_ft_sta_deinit(struct wpa_state_machine *sm)
1794 {
1795 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1796 }
1797
1798
1799 static void wpa_ft_deinit_seq(struct wpa_authenticator *wpa_auth)
1800 {
1801 struct ft_remote_r0kh *r0kh;
1802 struct ft_remote_r1kh *r1kh;
1803
1804 eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, wpa_auth, ELOOP_ALL_CTX);
1805
1806 if (wpa_auth->conf.r0kh_list)
1807 r0kh = *wpa_auth->conf.r0kh_list;
1808 else
1809 r0kh = NULL;
1810 for (; r0kh; r0kh = r0kh->next) {
1811 if (!r0kh->seq)
1812 continue;
1813 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1814 os_free(r0kh->seq);
1815 r0kh->seq = NULL;
1816 }
1817
1818 if (wpa_auth->conf.r1kh_list)
1819 r1kh = *wpa_auth->conf.r1kh_list;
1820 else
1821 r1kh = NULL;
1822 for (; r1kh; r1kh = r1kh->next) {
1823 if (!r1kh->seq)
1824 continue;
1825 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1826 os_free(r1kh->seq);
1827 r1kh->seq = NULL;
1828 }
1829 }
1830
1831
1832 static void wpa_ft_deinit_rkh_tmp(struct wpa_authenticator *wpa_auth)
1833 {
1834 struct ft_remote_r0kh *r0kh, *r0kh_next, *r0kh_prev = NULL;
1835 struct ft_remote_r1kh *r1kh, *r1kh_next, *r1kh_prev = NULL;
1836
1837 if (wpa_auth->conf.r0kh_list)
1838 r0kh = *wpa_auth->conf.r0kh_list;
1839 else
1840 r0kh = NULL;
1841 while (r0kh) {
1842 r0kh_next = r0kh->next;
1843 if (eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth,
1844 r0kh) > 0) {
1845 if (r0kh_prev)
1846 r0kh_prev->next = r0kh_next;
1847 else
1848 *wpa_auth->conf.r0kh_list = r0kh_next;
1849 os_free(r0kh);
1850 } else {
1851 r0kh_prev = r0kh;
1852 }
1853 r0kh = r0kh_next;
1854 }
1855
1856 if (wpa_auth->conf.r1kh_list)
1857 r1kh = *wpa_auth->conf.r1kh_list;
1858 else
1859 r1kh = NULL;
1860 while (r1kh) {
1861 r1kh_next = r1kh->next;
1862 if (eloop_cancel_timeout(wpa_ft_rrb_del_r1kh, wpa_auth,
1863 r1kh) > 0) {
1864 if (r1kh_prev)
1865 r1kh_prev->next = r1kh_next;
1866 else
1867 *wpa_auth->conf.r1kh_list = r1kh_next;
1868 os_free(r1kh);
1869 } else {
1870 r1kh_prev = r1kh;
1871 }
1872 r1kh = r1kh_next;
1873 }
1874 }
1875
1876
1877 void wpa_ft_deinit(struct wpa_authenticator *wpa_auth)
1878 {
1879 wpa_ft_deinit_seq(wpa_auth);
1880 wpa_ft_deinit_rkh_tmp(wpa_auth);
1881 }
1882
1883
1884 static void wpa_ft_block_r0kh(struct wpa_authenticator *wpa_auth,
1885 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1886 {
1887 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1888
1889 if (!wpa_auth->conf.rkh_neg_timeout)
1890 return;
1891
1892 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
1893 &r0kh, &r0kh_wildcard);
1894
1895 if (!r0kh_wildcard) {
1896 /* r0kh removed after neg_timeout and might need re-adding */
1897 return;
1898 }
1899
1900 wpa_hexdump(MSG_DEBUG, "FT: Blacklist R0KH-ID",
1901 f_r0kh_id, f_r0kh_id_len);
1902
1903 if (r0kh) {
1904 wpa_ft_rrb_r0kh_timeout(wpa_auth, r0kh,
1905 wpa_auth->conf.rkh_neg_timeout);
1906 os_memset(r0kh->addr, 0, ETH_ALEN);
1907 } else
1908 wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, NULL, f_r0kh_id,
1909 f_r0kh_id_len,
1910 wpa_auth->conf.rkh_neg_timeout);
1911 }
1912
1913
1914 static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx)
1915 {
1916 struct wpa_state_machine *sm = eloop_ctx;
1917
1918 wpa_printf(MSG_DEBUG, "FT: Timeout pending pull request for " MACSTR,
1919 MAC2STR(sm->addr));
1920 if (sm->ft_pending_pull_left_retries <= 0)
1921 wpa_ft_block_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len);
1922
1923 /* cancel multiple timeouts */
1924 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1925 ft_finish_pull(sm);
1926 }
1927
1928
1929 static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
1930 const u8 *ies, size_t ies_len,
1931 const u8 *pmk_r0_name)
1932 {
1933 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1934 u8 *packet = NULL;
1935 const u8 *key, *f_r1kh_id = sm->wpa_auth->conf.r1_key_holder;
1936 size_t packet_len, key_len;
1937 struct ft_rrb_seq f_seq;
1938 int tsecs, tusecs, first;
1939 struct wpabuf *ft_pending_req_ies;
1940 int r0kh_timeout;
1941 struct tlv_list req_enc[] = {
1942 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
1943 .data = pmk_r0_name },
1944 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
1945 .data = sm->addr },
1946 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1947 };
1948 struct tlv_list req_auth[] = {
1949 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
1950 .data = sm->ft_pending_pull_nonce },
1951 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
1952 .data = (u8 *) &f_seq },
1953 { .type = FT_RRB_R0KH_ID, .len = sm->r0kh_id_len,
1954 .data = sm->r0kh_id },
1955 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
1956 .data = f_r1kh_id },
1957 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1958 };
1959
1960 if (sm->ft_pending_pull_left_retries <= 0)
1961 return -1;
1962 first = sm->ft_pending_pull_left_retries ==
1963 sm->wpa_auth->conf.rkh_pull_retries;
1964 sm->ft_pending_pull_left_retries--;
1965
1966 wpa_ft_rrb_lookup_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len,
1967 &r0kh, &r0kh_wildcard);
1968
1969 /* Keep r0kh sufficiently long in the list for seq num check */
1970 r0kh_timeout = sm->wpa_auth->conf.rkh_pull_timeout / 1000 +
1971 1 + ftRRBseqTimeout;
1972 if (r0kh) {
1973 wpa_ft_rrb_r0kh_replenish(sm->wpa_auth, r0kh, r0kh_timeout);
1974 } else if (r0kh_wildcard) {
1975 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
1976 /* r0kh->addr: updated by SEQ_RESP and wpa_ft_expire_pull */
1977 r0kh = wpa_ft_rrb_add_r0kh(sm->wpa_auth, r0kh_wildcard,
1978 r0kh_wildcard->addr,
1979 sm->r0kh_id, sm->r0kh_id_len,
1980 r0kh_timeout);
1981 }
1982 if (r0kh == NULL) {
1983 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
1984 sm->r0kh_id, sm->r0kh_id_len);
1985 return -1;
1986 }
1987 if (is_zero_ether_addr(r0kh->addr)) {
1988 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID is blacklisted",
1989 sm->r0kh_id, sm->r0kh_id_len);
1990 return -1;
1991 }
1992 if (os_memcmp(r0kh->addr, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1993 wpa_printf(MSG_DEBUG,
1994 "FT: R0KH-ID points to self - no matching key available");
1995 return -1;
1996 }
1997
1998 key = r0kh->key;
1999 key_len = sizeof(r0kh->key);
2000
2001 if (r0kh->seq->rx.num_last == 0) {
2002 /* A sequence request will be sent out anyway when pull
2003 * response is received. Send it out now to avoid one RTT. */
2004 wpa_ft_rrb_seq_req(sm->wpa_auth, r0kh->seq, r0kh->addr,
2005 r0kh->id, r0kh->id_len, f_r1kh_id, key,
2006 key_len, NULL, 0, NULL, 0, NULL);
2007 }
2008
2009 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request from " MACSTR
2010 " to remote R0KH address " MACSTR,
2011 MAC2STR(sm->wpa_auth->addr), MAC2STR(r0kh->addr));
2012
2013 if (first &&
2014 random_get_bytes(sm->ft_pending_pull_nonce, FT_RRB_NONCE_LEN) < 0) {
2015 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
2016 "nonce");
2017 return -1;
2018 }
2019
2020 if (wpa_ft_new_seq(r0kh->seq, &f_seq) < 0) {
2021 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
2022 return -1;
2023 }
2024
2025 if (wpa_ft_rrb_build(key, key_len, req_enc, NULL, req_auth, NULL,
2026 sm->wpa_auth->addr, FT_PACKET_R0KH_R1KH_PULL,
2027 &packet, &packet_len) < 0)
2028 return -1;
2029
2030 ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
2031 wpabuf_free(sm->ft_pending_req_ies);
2032 sm->ft_pending_req_ies = ft_pending_req_ies;
2033 if (!sm->ft_pending_req_ies) {
2034 os_free(packet);
2035 return -1;
2036 }
2037
2038 tsecs = sm->wpa_auth->conf.rkh_pull_timeout / 1000;
2039 tusecs = (sm->wpa_auth->conf.rkh_pull_timeout % 1000) * 1000;
2040 eloop_register_timeout(tsecs, tusecs, wpa_ft_expire_pull, sm, NULL);
2041
2042 wpa_ft_rrb_oui_send(sm->wpa_auth, r0kh->addr, FT_PACKET_R0KH_R1KH_PULL,
2043 packet, packet_len);
2044
2045 os_free(packet);
2046
2047 return 0;
2048 }
2049
2050
2051 int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm,
2052 const u8 *pmk_r0, const u8 *pmk_r0_name)
2053 {
2054 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2055 struct vlan_description vlan;
2056 const u8 *identity, *radius_cui;
2057 size_t identity_len, radius_cui_len;
2058 int session_timeout;
2059 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2060 SHA384_MAC_LEN : PMK_LEN;
2061
2062 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2063 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2064 MAC2STR(sm->addr));
2065 return -1;
2066 }
2067
2068 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2069 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2070 &radius_cui);
2071 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2072
2073 return wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2074 pmk_r0_name, sm->pairwise, &vlan, expires_in,
2075 session_timeout, identity, identity_len,
2076 radius_cui, radius_cui_len);
2077 }
2078
2079
2080 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, struct wpa_ptk *ptk)
2081 {
2082 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2083 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2084 SHA384_MAC_LEN : PMK_LEN;
2085 size_t pmk_r1_len = pmk_r0_len;
2086 u8 pmk_r1[PMK_LEN_MAX];
2087 u8 ptk_name[WPA_PMK_NAME_LEN];
2088 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
2089 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
2090 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
2091 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
2092 const u8 *ssid = sm->wpa_auth->conf.ssid;
2093 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
2094 int psk_local = sm->wpa_auth->conf.ft_psk_generate_local;
2095 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2096 struct vlan_description vlan;
2097 const u8 *identity, *radius_cui;
2098 size_t identity_len, radius_cui_len;
2099 int session_timeout;
2100 const u8 *mpmk;
2101 size_t mpmk_len;
2102
2103 if (sm->xxkey_len > 0) {
2104 mpmk = sm->xxkey;
2105 mpmk_len = sm->xxkey_len;
2106 } else if (sm->pmksa) {
2107 mpmk = sm->pmksa->pmk;
2108 mpmk_len = sm->pmksa->pmk_len;
2109 } else {
2110 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
2111 "derivation");
2112 return -1;
2113 }
2114
2115 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2116 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2117 MAC2STR(sm->addr));
2118 return -1;
2119 }
2120
2121 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2122 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2123 &radius_cui);
2124 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2125
2126 if (wpa_derive_pmk_r0(mpmk, mpmk_len, ssid, ssid_len, mdid,
2127 r0kh, r0kh_len, sm->addr,
2128 pmk_r0, pmk_r0_name,
2129 wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) < 0)
2130 return -1;
2131 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
2132 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
2133 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2134 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2135 pmk_r0_name,
2136 sm->pairwise, &vlan, expires_in,
2137 session_timeout, identity, identity_len,
2138 radius_cui, radius_cui_len);
2139
2140 if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_len, pmk_r0_name, r1kh, sm->addr,
2141 pmk_r1, sm->pmk_r1_name) < 0)
2142 return -1;
2143 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
2144 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
2145 WPA_PMK_NAME_LEN);
2146 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2147 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_len,
2148 sm->pmk_r1_name, sm->pairwise, &vlan,
2149 expires_in, session_timeout, identity,
2150 identity_len, radius_cui, radius_cui_len);
2151
2152 return wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
2153 sm->addr, sm->wpa_auth->addr, sm->pmk_r1_name,
2154 ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
2155 }
2156
2157
2158 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
2159 const u8 *addr, int idx, u8 *seq)
2160 {
2161 if (wpa_auth->cb->get_seqnum == NULL)
2162 return -1;
2163 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
2164 }
2165
2166
2167 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
2168 {
2169 u8 *subelem;
2170 struct wpa_group *gsm = sm->group;
2171 size_t subelem_len, pad_len;
2172 const u8 *key;
2173 size_t key_len;
2174 u8 keybuf[32];
2175 const u8 *kek;
2176 size_t kek_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 key_len = gsm->GTK_len;
2187 if (key_len > sizeof(keybuf))
2188 return NULL;
2189
2190 /*
2191 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
2192 * than 16 bytes.
2193 */
2194 pad_len = key_len % 8;
2195 if (pad_len)
2196 pad_len = 8 - pad_len;
2197 if (key_len + pad_len < 16)
2198 pad_len += 8;
2199 if (pad_len && key_len < sizeof(keybuf)) {
2200 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
2201 os_memset(keybuf + key_len, 0, pad_len);
2202 keybuf[key_len] = 0xdd;
2203 key_len += pad_len;
2204 key = keybuf;
2205 } else
2206 key = gsm->GTK[gsm->GN - 1];
2207
2208 /*
2209 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2210 * Key[5..32].
2211 */
2212 subelem_len = 13 + key_len + 8;
2213 subelem = os_zalloc(subelem_len);
2214 if (subelem == NULL)
2215 return NULL;
2216
2217 subelem[0] = FTIE_SUBELEM_GTK;
2218 subelem[1] = 11 + key_len + 8;
2219 /* Key ID in B0-B1 of Key Info */
2220 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
2221 subelem[4] = gsm->GTK_len;
2222 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
2223 if (aes_wrap(kek, kek_len, key_len / 8, key, subelem + 13)) {
2224 wpa_printf(MSG_DEBUG,
2225 "FT: GTK subelem encryption failed: kek_len=%d",
2226 (int) kek_len);
2227 os_free(subelem);
2228 return NULL;
2229 }
2230
2231 forced_memzero(keybuf, sizeof(keybuf));
2232 *len = subelem_len;
2233 return subelem;
2234 }
2235
2236
2237 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
2238 {
2239 u8 *subelem, *pos;
2240 struct wpa_group *gsm = sm->group;
2241 size_t subelem_len;
2242 const u8 *kek;
2243 size_t kek_len;
2244 size_t igtk_len;
2245
2246 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2247 kek = sm->PTK.kek2;
2248 kek_len = sm->PTK.kek2_len;
2249 } else {
2250 kek = sm->PTK.kek;
2251 kek_len = sm->PTK.kek_len;
2252 }
2253
2254 igtk_len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2255
2256 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
2257 * Key[16+8] */
2258 subelem_len = 1 + 1 + 2 + 6 + 1 + igtk_len + 8;
2259 subelem = os_zalloc(subelem_len);
2260 if (subelem == NULL)
2261 return NULL;
2262
2263 pos = subelem;
2264 *pos++ = FTIE_SUBELEM_IGTK;
2265 *pos++ = subelem_len - 2;
2266 WPA_PUT_LE16(pos, gsm->GN_igtk);
2267 pos += 2;
2268 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
2269 pos += 6;
2270 *pos++ = igtk_len;
2271 if (aes_wrap(kek, kek_len, igtk_len / 8,
2272 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
2273 wpa_printf(MSG_DEBUG,
2274 "FT: IGTK subelem encryption failed: kek_len=%d",
2275 (int) kek_len);
2276 os_free(subelem);
2277 return NULL;
2278 }
2279
2280 *len = subelem_len;
2281 return subelem;
2282 }
2283
2284
2285 static u8 * wpa_ft_bigtk_subelem(struct wpa_state_machine *sm, size_t *len)
2286 {
2287 u8 *subelem, *pos;
2288 struct wpa_group *gsm = sm->group;
2289 size_t subelem_len;
2290 const u8 *kek;
2291 size_t kek_len;
2292 size_t bigtk_len;
2293
2294 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2295 kek = sm->PTK.kek2;
2296 kek_len = sm->PTK.kek2_len;
2297 } else {
2298 kek = sm->PTK.kek;
2299 kek_len = sm->PTK.kek_len;
2300 }
2301
2302 bigtk_len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2303
2304 /* Sub-elem ID[1] | Length[1] | KeyID[2] | BIPN[6] | Key Length[1] |
2305 * Key[16+8] */
2306 subelem_len = 1 + 1 + 2 + 6 + 1 + bigtk_len + 8;
2307 subelem = os_zalloc(subelem_len);
2308 if (subelem == NULL)
2309 return NULL;
2310
2311 pos = subelem;
2312 *pos++ = FTIE_SUBELEM_BIGTK;
2313 *pos++ = subelem_len - 2;
2314 WPA_PUT_LE16(pos, gsm->GN_bigtk);
2315 pos += 2;
2316 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_bigtk, pos);
2317 pos += 6;
2318 *pos++ = bigtk_len;
2319 if (aes_wrap(kek, kek_len, bigtk_len / 8,
2320 gsm->IGTK[gsm->GN_bigtk - 6], pos)) {
2321 wpa_printf(MSG_DEBUG,
2322 "FT: BIGTK subelem encryption failed: kek_len=%d",
2323 (int) kek_len);
2324 os_free(subelem);
2325 return NULL;
2326 }
2327
2328 *len = subelem_len;
2329 return subelem;
2330 }
2331
2332
2333 static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
2334 u8 *pos, u8 *end, u8 id, u8 descr_count,
2335 const u8 *ies, size_t ies_len)
2336 {
2337 struct ieee802_11_elems parse;
2338 struct rsn_rdie *rdie;
2339
2340 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
2341 id, descr_count);
2342 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
2343 ies, ies_len);
2344
2345 if (end - pos < (int) sizeof(*rdie)) {
2346 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
2347 return pos;
2348 }
2349
2350 *pos++ = WLAN_EID_RIC_DATA;
2351 *pos++ = sizeof(*rdie);
2352 rdie = (struct rsn_rdie *) pos;
2353 rdie->id = id;
2354 rdie->descr_count = 0;
2355 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
2356 pos += sizeof(*rdie);
2357
2358 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
2359 ParseFailed) {
2360 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
2361 rdie->status_code =
2362 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2363 return pos;
2364 }
2365
2366 if (parse.wmm_tspec) {
2367 struct wmm_tspec_element *tspec;
2368
2369 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
2370 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
2371 "(%d)", (int) parse.wmm_tspec_len);
2372 rdie->status_code =
2373 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2374 return pos;
2375 }
2376 if (end - pos < (int) sizeof(*tspec)) {
2377 wpa_printf(MSG_ERROR, "FT: Not enough room for "
2378 "response TSPEC");
2379 rdie->status_code =
2380 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2381 return pos;
2382 }
2383 tspec = (struct wmm_tspec_element *) pos;
2384 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
2385 }
2386
2387 #ifdef NEED_AP_MLME
2388 if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
2389 int res;
2390
2391 res = wmm_process_tspec((struct wmm_tspec_element *) pos);
2392 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
2393 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
2394 rdie->status_code =
2395 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
2396 else if (res == WMM_ADDTS_STATUS_REFUSED)
2397 rdie->status_code =
2398 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
2399 else {
2400 /* TSPEC accepted; include updated TSPEC in response */
2401 rdie->descr_count = 1;
2402 pos += sizeof(struct wmm_tspec_element);
2403 }
2404 return pos;
2405 }
2406 #endif /* NEED_AP_MLME */
2407
2408 if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
2409 int res;
2410
2411 res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
2412 sizeof(struct wmm_tspec_element));
2413 if (res >= 0) {
2414 if (res)
2415 rdie->status_code = host_to_le16(res);
2416 else {
2417 /* TSPEC accepted; include updated TSPEC in
2418 * response */
2419 rdie->descr_count = 1;
2420 pos += sizeof(struct wmm_tspec_element);
2421 }
2422 return pos;
2423 }
2424 }
2425
2426 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
2427 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2428 return pos;
2429 }
2430
2431
2432 static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
2433 const u8 *ric, size_t ric_len)
2434 {
2435 const u8 *rpos, *start;
2436 const struct rsn_rdie *rdie;
2437
2438 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
2439
2440 rpos = ric;
2441 while (rpos + sizeof(*rdie) < ric + ric_len) {
2442 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
2443 rpos + 2 + rpos[1] > ric + ric_len)
2444 break;
2445 rdie = (const struct rsn_rdie *) (rpos + 2);
2446 rpos += 2 + rpos[1];
2447 start = rpos;
2448
2449 while (rpos + 2 <= ric + ric_len &&
2450 rpos + 2 + rpos[1] <= ric + ric_len) {
2451 if (rpos[0] == WLAN_EID_RIC_DATA)
2452 break;
2453 rpos += 2 + rpos[1];
2454 }
2455 pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
2456 rdie->descr_count,
2457 start, rpos - start);
2458 }
2459
2460 return pos;
2461 }
2462
2463
2464 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
2465 size_t max_len, int auth_alg,
2466 const u8 *req_ies, size_t req_ies_len)
2467 {
2468 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
2469 u8 *fte_mic, *elem_count;
2470 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
2471 u8 rsnxe_buf[10], *rsnxe = rsnxe_buf;
2472 size_t rsnxe_len;
2473 int rsnxe_used;
2474 int res;
2475 struct wpa_auth_config *conf;
2476 struct wpa_ft_ies parse;
2477 u8 *ric_start;
2478 u8 *anonce, *snonce;
2479 const u8 *kck;
2480 size_t kck_len;
2481 int use_sha384;
2482
2483 if (sm == NULL)
2484 return pos;
2485
2486 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2487 conf = &sm->wpa_auth->conf;
2488
2489 if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
2490 return pos;
2491
2492 end = pos + max_len;
2493
2494 #ifdef CONFIG_TESTING_OPTIONS
2495 if (auth_alg == WLAN_AUTH_FT &&
2496 sm->wpa_auth->conf.rsne_override_ft_set) {
2497 wpa_printf(MSG_DEBUG,
2498 "TESTING: RSNE FT override for MIC calculation");
2499 rsnie = sm->wpa_auth->conf.rsne_override_ft;
2500 rsnie_len = sm->wpa_auth->conf.rsne_override_ft_len;
2501 if (end - pos < (long int) rsnie_len)
2502 return pos;
2503 os_memcpy(pos, rsnie, rsnie_len);
2504 rsnie = pos;
2505 pos += rsnie_len;
2506 if (rsnie_len > PMKID_LEN && sm->pmk_r1_name_valid) {
2507 int idx;
2508
2509 /* Replace all 0xff PMKID with the valid PMKR1Name */
2510 for (idx = 0; idx < PMKID_LEN; idx++) {
2511 if (rsnie[rsnie_len - 1 - idx] != 0xff)
2512 break;
2513 }
2514 if (idx == PMKID_LEN)
2515 os_memcpy(&rsnie[rsnie_len - PMKID_LEN],
2516 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2517 }
2518 } else
2519 #endif /* CONFIG_TESTING_OPTIONS */
2520 if (auth_alg == WLAN_AUTH_FT ||
2521 ((auth_alg == WLAN_AUTH_FILS_SK ||
2522 auth_alg == WLAN_AUTH_FILS_SK_PFS ||
2523 auth_alg == WLAN_AUTH_FILS_PK) &&
2524 (sm->wpa_key_mgmt & (WPA_KEY_MGMT_FT_FILS_SHA256 |
2525 WPA_KEY_MGMT_FT_FILS_SHA384)))) {
2526 if (!sm->pmk_r1_name_valid) {
2527 wpa_printf(MSG_ERROR,
2528 "FT: PMKR1Name is not valid for Assoc Resp RSNE");
2529 return NULL;
2530 }
2531 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name for Assoc Resp RSNE",
2532 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2533 /*
2534 * RSN (only present if this is a Reassociation Response and
2535 * part of a fast BSS transition; or if this is a
2536 * (Re)Association Response frame during an FT initial mobility
2537 * domain association using FILS)
2538 */
2539 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
2540 if (res < 0)
2541 return NULL;
2542 rsnie = pos;
2543 rsnie_len = res;
2544 pos += res;
2545 }
2546
2547 /* Mobility Domain Information */
2548 res = wpa_write_mdie(conf, pos, end - pos);
2549 if (res < 0)
2550 return NULL;
2551 mdie = pos;
2552 mdie_len = res;
2553 pos += res;
2554
2555 /* Fast BSS Transition Information */
2556 if (auth_alg == WLAN_AUTH_FT) {
2557 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
2558 if (!subelem) {
2559 wpa_printf(MSG_DEBUG,
2560 "FT: Failed to add GTK subelement");
2561 return NULL;
2562 }
2563 r0kh_id = sm->r0kh_id;
2564 r0kh_id_len = sm->r0kh_id_len;
2565 anonce = sm->ANonce;
2566 snonce = sm->SNonce;
2567 if (sm->mgmt_frame_prot) {
2568 u8 *igtk;
2569 size_t igtk_len;
2570 u8 *nbuf;
2571 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
2572 if (igtk == NULL) {
2573 wpa_printf(MSG_DEBUG,
2574 "FT: Failed to add IGTK subelement");
2575 os_free(subelem);
2576 return NULL;
2577 }
2578 nbuf = os_realloc(subelem, subelem_len + igtk_len);
2579 if (nbuf == NULL) {
2580 os_free(subelem);
2581 os_free(igtk);
2582 return NULL;
2583 }
2584 subelem = nbuf;
2585 os_memcpy(subelem + subelem_len, igtk, igtk_len);
2586 subelem_len += igtk_len;
2587 os_free(igtk);
2588 }
2589 if (sm->mgmt_frame_prot && conf->beacon_prot) {
2590 u8 *bigtk;
2591 size_t bigtk_len;
2592 u8 *nbuf;
2593
2594 bigtk = wpa_ft_bigtk_subelem(sm, &bigtk_len);
2595 if (!bigtk) {
2596 wpa_printf(MSG_DEBUG,
2597 "FT: Failed to add BIGTK subelement");
2598 os_free(subelem);
2599 return NULL;
2600 }
2601 nbuf = os_realloc(subelem, subelem_len + bigtk_len);
2602 if (!nbuf) {
2603 os_free(subelem);
2604 os_free(bigtk);
2605 return NULL;
2606 }
2607 subelem = nbuf;
2608 os_memcpy(subelem + subelem_len, bigtk, bigtk_len);
2609 subelem_len += bigtk_len;
2610 os_free(bigtk);
2611 }
2612 #ifdef CONFIG_OCV
2613 if (wpa_auth_uses_ocv(sm)) {
2614 struct wpa_channel_info ci;
2615 u8 *nbuf, *ocipos;
2616
2617 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2618 wpa_printf(MSG_WARNING,
2619 "Failed to get channel info for OCI element");
2620 os_free(subelem);
2621 return NULL;
2622 }
2623
2624 subelem_len += 2 + OCV_OCI_LEN;
2625 nbuf = os_realloc(subelem, subelem_len);
2626 if (!nbuf) {
2627 os_free(subelem);
2628 return NULL;
2629 }
2630 subelem = nbuf;
2631
2632 ocipos = subelem + subelem_len - 2 - OCV_OCI_LEN;
2633 *ocipos++ = FTIE_SUBELEM_OCI;
2634 *ocipos++ = OCV_OCI_LEN;
2635 if (ocv_insert_oci(&ci, &ocipos) < 0) {
2636 os_free(subelem);
2637 return NULL;
2638 }
2639 }
2640 #endif /* CONFIG_OCV */
2641 } else {
2642 r0kh_id = conf->r0_key_holder;
2643 r0kh_id_len = conf->r0_key_holder_len;
2644 anonce = NULL;
2645 snonce = NULL;
2646 }
2647 rsnxe_used = (auth_alg == WLAN_AUTH_FT) &&
2648 (conf->sae_pwe == 1 || conf->sae_pwe == 2);
2649 res = wpa_write_ftie(conf, use_sha384, r0kh_id, r0kh_id_len,
2650 anonce, snonce, pos, end - pos,
2651 subelem, subelem_len, rsnxe_used);
2652 os_free(subelem);
2653 if (res < 0)
2654 return NULL;
2655 ftie = pos;
2656 ftie_len = res;
2657 pos += res;
2658
2659 if (use_sha384) {
2660 struct rsn_ftie_sha384 *_ftie =
2661 (struct rsn_ftie_sha384 *) (ftie + 2);
2662
2663 fte_mic = _ftie->mic;
2664 elem_count = &_ftie->mic_control[1];
2665 } else {
2666 struct rsn_ftie *_ftie = (struct rsn_ftie *) (ftie + 2);
2667
2668 fte_mic = _ftie->mic;
2669 elem_count = &_ftie->mic_control[1];
2670 }
2671 if (auth_alg == WLAN_AUTH_FT)
2672 *elem_count = 3; /* Information element count */
2673
2674 ric_start = pos;
2675 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse, use_sha384) == 0
2676 && parse.ric) {
2677 pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
2678 parse.ric_len);
2679 if (auth_alg == WLAN_AUTH_FT)
2680 *elem_count +=
2681 ieee802_11_ie_count(ric_start,
2682 pos - ric_start);
2683 }
2684 if (ric_start == pos)
2685 ric_start = NULL;
2686
2687 res = wpa_write_rsnxe(&sm->wpa_auth->conf, rsnxe, sizeof(rsnxe_buf));
2688 if (res < 0)
2689 return NULL;
2690 rsnxe_len = res;
2691 #ifdef CONFIG_TESTING_OPTIONS
2692 if (auth_alg == WLAN_AUTH_FT &&
2693 sm->wpa_auth->conf.rsnxe_override_ft_set) {
2694 wpa_printf(MSG_DEBUG,
2695 "TESTING: RSNXE FT override for MIC calculation");
2696 rsnxe = sm->wpa_auth->conf.rsnxe_override_ft;
2697 rsnxe_len = sm->wpa_auth->conf.rsnxe_override_ft_len;
2698 }
2699 #endif /* CONFIG_TESTING_OPTIONS */
2700 if (auth_alg == WLAN_AUTH_FT && rsnxe_len)
2701 *elem_count += 1;
2702
2703 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2704 kck = sm->PTK.kck2;
2705 kck_len = sm->PTK.kck2_len;
2706 } else {
2707 kck = sm->PTK.kck;
2708 kck_len = sm->PTK.kck_len;
2709 }
2710 if (auth_alg == WLAN_AUTH_FT &&
2711 wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 6,
2712 mdie, mdie_len, ftie, ftie_len,
2713 rsnie, rsnie_len,
2714 ric_start, ric_start ? pos - ric_start : 0,
2715 rsnxe_len ? rsnxe : NULL, rsnxe_len,
2716 fte_mic) < 0) {
2717 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
2718 return NULL;
2719 }
2720
2721 os_free(sm->assoc_resp_ftie);
2722 sm->assoc_resp_ftie = os_malloc(ftie_len);
2723 if (!sm->assoc_resp_ftie)
2724 return NULL;
2725 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
2726
2727 return pos;
2728 }
2729
2730
2731 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
2732 int vlan_id,
2733 enum wpa_alg alg, const u8 *addr, int idx,
2734 u8 *key, size_t key_len,
2735 enum key_flag key_flag)
2736 {
2737 if (wpa_auth->cb->set_key == NULL)
2738 return -1;
2739 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
2740 key, key_len, key_flag);
2741 }
2742
2743
2744 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
2745 {
2746 enum wpa_alg alg;
2747 int klen;
2748
2749 /* MLME-SETKEYS.request(PTK) */
2750 alg = wpa_cipher_to_alg(sm->pairwise);
2751 klen = wpa_cipher_key_len(sm->pairwise);
2752 if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
2753 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
2754 "PTK configuration", sm->pairwise);
2755 return;
2756 }
2757
2758 if (sm->tk_already_set) {
2759 /* Must avoid TK reconfiguration to prevent clearing of TX/RX
2760 * PN in the driver */
2761 wpa_printf(MSG_DEBUG,
2762 "FT: Do not re-install same PTK to the driver");
2763 return;
2764 }
2765
2766 /* FIX: add STA entry to kernel/driver here? The set_key will fail
2767 * most likely without this.. At the moment, STA entry is added only
2768 * after association has been completed. This function will be called
2769 * again after association to get the PTK configured, but that could be
2770 * optimized by adding the STA entry earlier.
2771 */
2772 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2773 sm->PTK.tk, klen, KEY_FLAG_PAIRWISE_RX_TX))
2774 return;
2775
2776 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2777 sm->pairwise_set = TRUE;
2778 sm->tk_already_set = TRUE;
2779 }
2780
2781
2782 /* Derive PMK-R1 from PSK, check all available PSK */
2783 static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm,
2784 const u8 *req_pmk_r1_name,
2785 u8 *out_pmk_r1, int *out_pairwise,
2786 struct vlan_description *out_vlan,
2787 const u8 **out_identity, size_t *out_identity_len,
2788 const u8 **out_radius_cui,
2789 size_t *out_radius_cui_len,
2790 int *out_session_timeout)
2791 {
2792 const u8 *pmk = NULL;
2793 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2794 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
2795 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2796 const u8 *mdid = wpa_auth->conf.mobility_domain;
2797 const u8 *r0kh = sm->r0kh_id;
2798 size_t r0kh_len = sm->r0kh_id_len;
2799 const u8 *r1kh = wpa_auth->conf.r1_key_holder;
2800 const u8 *ssid = wpa_auth->conf.ssid;
2801 size_t ssid_len = wpa_auth->conf.ssid_len;
2802 int pairwise;
2803
2804 pairwise = sm->pairwise;
2805
2806 for (;;) {
2807 pmk = wpa_ft_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr,
2808 pmk);
2809 if (pmk == NULL)
2810 break;
2811
2812 if (wpa_derive_pmk_r0(pmk, PMK_LEN, ssid, ssid_len, mdid, r0kh,
2813 r0kh_len, sm->addr,
2814 pmk_r0, pmk_r0_name, 0) < 0 ||
2815 wpa_derive_pmk_r1(pmk_r0, PMK_LEN, pmk_r0_name, r1kh,
2816 sm->addr, pmk_r1, pmk_r1_name) < 0 ||
2817 os_memcmp_const(pmk_r1_name, req_pmk_r1_name,
2818 WPA_PMK_NAME_LEN) != 0)
2819 continue;
2820
2821 /* We found a PSK that matches the requested pmk_r1_name */
2822 wpa_printf(MSG_DEBUG,
2823 "FT: Found PSK to generate PMK-R1 locally");
2824 os_memcpy(out_pmk_r1, pmk_r1, PMK_LEN);
2825 if (out_pairwise)
2826 *out_pairwise = pairwise;
2827 os_memcpy(sm->PMK, pmk, PMK_LEN);
2828 sm->pmk_len = PMK_LEN;
2829 if (out_vlan &&
2830 wpa_ft_get_vlan(sm->wpa_auth, sm->addr, out_vlan) < 0) {
2831 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA "
2832 MACSTR, MAC2STR(sm->addr));
2833 return -1;
2834 }
2835
2836 if (out_identity && out_identity_len) {
2837 *out_identity_len = wpa_ft_get_identity(
2838 sm->wpa_auth, sm->addr, out_identity);
2839 }
2840
2841 if (out_radius_cui && out_radius_cui_len) {
2842 *out_radius_cui_len = wpa_ft_get_radius_cui(
2843 sm->wpa_auth, sm->addr, out_radius_cui);
2844 }
2845
2846 if (out_session_timeout) {
2847 *out_session_timeout = wpa_ft_get_session_timeout(
2848 sm->wpa_auth, sm->addr);
2849 }
2850
2851 return 0;
2852 }
2853
2854 wpa_printf(MSG_DEBUG,
2855 "FT: Did not find PSK to generate PMK-R1 locally");
2856 return -1;
2857 }
2858
2859
2860 /* Detect the configuration the station asked for.
2861 * Required to detect FT-PSK and pairwise cipher.
2862 */
2863 static int wpa_ft_set_key_mgmt(struct wpa_state_machine *sm,
2864 struct wpa_ft_ies *parse)
2865 {
2866 int key_mgmt, ciphers;
2867
2868 if (sm->wpa_key_mgmt)
2869 return 0;
2870
2871 key_mgmt = parse->key_mgmt & sm->wpa_auth->conf.wpa_key_mgmt;
2872 if (!key_mgmt) {
2873 wpa_printf(MSG_DEBUG, "FT: Invalid key mgmt (0x%x) from "
2874 MACSTR, parse->key_mgmt, MAC2STR(sm->addr));
2875 return -1;
2876 }
2877 if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
2878 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
2879 #ifdef CONFIG_SHA384
2880 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2881 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
2882 #endif /* CONFIG_SHA384 */
2883 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
2884 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
2885 #ifdef CONFIG_FILS
2886 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256)
2887 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA256;
2888 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384)
2889 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA384;
2890 #endif /* CONFIG_FILS */
2891 ciphers = parse->pairwise_cipher & sm->wpa_auth->conf.rsn_pairwise;
2892 if (!ciphers) {
2893 wpa_printf(MSG_DEBUG, "FT: Invalid pairwise cipher (0x%x) from "
2894 MACSTR,
2895 parse->pairwise_cipher, MAC2STR(sm->addr));
2896 return -1;
2897 }
2898 sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0);
2899
2900 return 0;
2901 }
2902
2903
2904 static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
2905 struct wpa_state_machine *sm,
2906 const u8 *r0kh_id, size_t r0kh_id_len,
2907 const u8 *req_pmk_r0_name,
2908 const u8 *req_pmk_r1_name,
2909 u8 *out_pmk_r1, int *out_pairwise,
2910 struct vlan_description *vlan,
2911 const u8 **identity, size_t *identity_len,
2912 const u8 **radius_cui,
2913 size_t *radius_cui_len,
2914 int *out_session_timeout)
2915 {
2916 struct wpa_auth_config *conf = &wpa_auth->conf;
2917 const struct wpa_ft_pmk_r0_sa *r0;
2918 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
2919 int expires_in = 0;
2920 int session_timeout = 0;
2921 struct os_reltime now;
2922
2923 if (conf->r0_key_holder_len != r0kh_id_len ||
2924 os_memcmp(conf->r0_key_holder, r0kh_id, conf->r0_key_holder_len) !=
2925 0)
2926 return -1; /* not our R0KH-ID */
2927
2928 wpa_printf(MSG_DEBUG, "FT: STA R0KH-ID matching local configuration");
2929 if (wpa_ft_fetch_pmk_r0(sm->wpa_auth, sm->addr, req_pmk_r0_name, &r0) <
2930 0)
2931 return -1; /* no matching PMKR0Name in local cache */
2932
2933 wpa_printf(MSG_DEBUG, "FT: Requested PMKR0Name found in local cache");
2934
2935 if (wpa_derive_pmk_r1(r0->pmk_r0, r0->pmk_r0_len, r0->pmk_r0_name,
2936 conf->r1_key_holder,
2937 sm->addr, out_pmk_r1, pmk_r1_name) < 0)
2938 return -1;
2939 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", out_pmk_r1, r0->pmk_r0_len);
2940 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
2941
2942 os_get_reltime(&now);
2943 if (r0->expiration)
2944 expires_in = r0->expiration - now.sec;
2945
2946 if (r0->session_timeout)
2947 session_timeout = r0->session_timeout - now.sec;
2948
2949 wpa_ft_store_pmk_r1(wpa_auth, sm->addr, out_pmk_r1, r0->pmk_r0_len,
2950 pmk_r1_name,
2951 sm->pairwise, r0->vlan, expires_in, session_timeout,
2952 r0->identity, r0->identity_len,
2953 r0->radius_cui, r0->radius_cui_len);
2954
2955 *out_pairwise = sm->pairwise;
2956 if (vlan) {
2957 if (r0->vlan)
2958 *vlan = *r0->vlan;
2959 else
2960 os_memset(vlan, 0, sizeof(*vlan));
2961 }
2962
2963 if (identity && identity_len) {
2964 *identity = r0->identity;
2965 *identity_len = r0->identity_len;
2966 }
2967
2968 if (radius_cui && radius_cui_len) {
2969 *radius_cui = r0->radius_cui;
2970 *radius_cui_len = r0->radius_cui_len;
2971 }
2972
2973 *out_session_timeout = session_timeout;
2974
2975 return 0;
2976 }
2977
2978
2979 static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
2980 const u8 *ies, size_t ies_len,
2981 u8 **resp_ies, size_t *resp_ies_len)
2982 {
2983 struct rsn_mdie *mdie;
2984 u8 pmk_r1[PMK_LEN_MAX], pmk_r1_name[WPA_PMK_NAME_LEN];
2985 u8 ptk_name[WPA_PMK_NAME_LEN];
2986 struct wpa_auth_config *conf;
2987 struct wpa_ft_ies parse;
2988 size_t buflen;
2989 int ret;
2990 u8 *pos, *end;
2991 int pairwise, session_timeout = 0;
2992 struct vlan_description vlan;
2993 const u8 *identity, *radius_cui;
2994 size_t identity_len = 0, radius_cui_len = 0;
2995 int use_sha384;
2996 size_t pmk_r1_len;
2997
2998 *resp_ies = NULL;
2999 *resp_ies_len = 0;
3000
3001 sm->pmk_r1_name_valid = 0;
3002 conf = &sm->wpa_auth->conf;
3003
3004 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
3005 ies, ies_len);
3006
3007 if (wpa_ft_parse_ies(ies, ies_len, &parse, -1)) {
3008 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
3009 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3010 }
3011 use_sha384 = wpa_key_mgmt_sha384(parse.key_mgmt);
3012 pmk_r1_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
3013
3014 mdie = (struct rsn_mdie *) parse.mdie;
3015 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
3016 os_memcmp(mdie->mobility_domain,
3017 sm->wpa_auth->conf.mobility_domain,
3018 MOBILITY_DOMAIN_ID_LEN) != 0) {
3019 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
3020 return WLAN_STATUS_INVALID_MDIE;
3021 }
3022
3023 if (use_sha384) {
3024 struct rsn_ftie_sha384 *ftie;
3025
3026 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
3027 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
3028 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3029 return WLAN_STATUS_INVALID_FTIE;
3030 }
3031
3032 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
3033 } else {
3034 struct rsn_ftie *ftie;
3035
3036 ftie = (struct rsn_ftie *) parse.ftie;
3037 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
3038 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3039 return WLAN_STATUS_INVALID_FTIE;
3040 }
3041
3042 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
3043 }
3044
3045 if (parse.r0kh_id == NULL) {
3046 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
3047 return WLAN_STATUS_INVALID_FTIE;
3048 }
3049
3050 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
3051 parse.r0kh_id, parse.r0kh_id_len);
3052 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
3053 sm->r0kh_id_len = parse.r0kh_id_len;
3054
3055 if (parse.rsn_pmkid == NULL) {
3056 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
3057 return WLAN_STATUS_INVALID_PMKID;
3058 }
3059
3060 if (wpa_ft_set_key_mgmt(sm, &parse) < 0)
3061 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3062
3063 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
3064 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
3065 if (wpa_derive_pmk_r1_name(parse.rsn_pmkid,
3066 sm->wpa_auth->conf.r1_key_holder, sm->addr,
3067 pmk_r1_name, use_sha384) < 0)
3068 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3069 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
3070 pmk_r1_name, WPA_PMK_NAME_LEN);
3071
3072 if (conf->ft_psk_generate_local &&
3073 wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
3074 if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise,
3075 &vlan, &identity, &identity_len,
3076 &radius_cui, &radius_cui_len,
3077 &session_timeout) < 0)
3078 return WLAN_STATUS_INVALID_PMKID;
3079 wpa_printf(MSG_DEBUG,
3080 "FT: Generated PMK-R1 for FT-PSK locally");
3081 } else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name,
3082 pmk_r1, &pmk_r1_len, &pairwise, &vlan,
3083 &identity, &identity_len, &radius_cui,
3084 &radius_cui_len, &session_timeout) < 0) {
3085 wpa_printf(MSG_DEBUG,
3086 "FT: No PMK-R1 available in local cache for the requested PMKR1Name");
3087 if (wpa_ft_local_derive_pmk_r1(sm->wpa_auth, sm,
3088 parse.r0kh_id, parse.r0kh_id_len,
3089 parse.rsn_pmkid,
3090 pmk_r1_name, pmk_r1, &pairwise,
3091 &vlan, &identity, &identity_len,
3092 &radius_cui, &radius_cui_len,
3093 &session_timeout) == 0) {
3094 wpa_printf(MSG_DEBUG,
3095 "FT: Generated PMK-R1 based on local PMK-R0");
3096 goto pmk_r1_derived;
3097 }
3098
3099 if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
3100 wpa_printf(MSG_DEBUG,
3101 "FT: Did not have matching PMK-R1 and either unknown or blocked R0KH-ID or NAK from R0KH");
3102 return WLAN_STATUS_INVALID_PMKID;
3103 }
3104
3105 return -1; /* Status pending */
3106 } else {
3107 wpa_printf(MSG_DEBUG, "FT: Found PMKR1Name from local cache");
3108 }
3109
3110 pmk_r1_derived:
3111 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, pmk_r1_len);
3112 sm->pmk_r1_name_valid = 1;
3113 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
3114 os_memcpy(sm->pmk_r1, pmk_r1, pmk_r1_len);
3115 sm->pmk_r1_len = pmk_r1_len;
3116
3117 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
3118 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
3119 "ANonce");
3120 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3121 }
3122
3123 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3124 sm->SNonce, WPA_NONCE_LEN);
3125 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
3126 sm->ANonce, WPA_NONCE_LEN);
3127
3128 if (wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
3129 sm->addr, sm->wpa_auth->addr, pmk_r1_name,
3130 &sm->PTK, ptk_name, sm->wpa_key_mgmt,
3131 pairwise) < 0)
3132 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3133
3134 sm->pairwise = pairwise;
3135 sm->PTK_valid = TRUE;
3136 sm->tk_already_set = FALSE;
3137 wpa_ft_install_ptk(sm);
3138
3139 if (wpa_ft_set_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
3140 wpa_printf(MSG_DEBUG, "FT: Failed to configure VLAN");
3141 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3142 }
3143 if (wpa_ft_set_identity(sm->wpa_auth, sm->addr,
3144 identity, identity_len) < 0 ||
3145 wpa_ft_set_radius_cui(sm->wpa_auth, sm->addr,
3146 radius_cui, radius_cui_len) < 0) {
3147 wpa_printf(MSG_DEBUG, "FT: Failed to configure identity/CUI");
3148 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3149 }
3150 wpa_ft_set_session_timeout(sm->wpa_auth, sm->addr, session_timeout);
3151
3152 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
3153 2 + FT_R1KH_ID_LEN + 200;
3154 *resp_ies = os_zalloc(buflen);
3155 if (*resp_ies == NULL)
3156 goto fail;
3157
3158 pos = *resp_ies;
3159 end = *resp_ies + buflen;
3160
3161 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
3162 if (ret < 0)
3163 goto fail;
3164 pos += ret;
3165
3166 ret = wpa_write_mdie(conf, pos, end - pos);
3167 if (ret < 0)
3168 goto fail;
3169 pos += ret;
3170
3171 ret = wpa_write_ftie(conf, use_sha384, parse.r0kh_id, parse.r0kh_id_len,
3172 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0,
3173 0);
3174 if (ret < 0)
3175 goto fail;
3176 pos += ret;
3177
3178 *resp_ies_len = pos - *resp_ies;
3179
3180 return WLAN_STATUS_SUCCESS;
3181 fail:
3182 os_free(*resp_ies);
3183 *resp_ies = NULL;
3184 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3185 }
3186
3187
3188 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
3189 u16 auth_transaction, const u8 *ies, size_t ies_len,
3190 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
3191 u16 auth_transaction, u16 status,
3192 const u8 *ies, size_t ies_len),
3193 void *ctx)
3194 {
3195 u16 status;
3196 u8 *resp_ies;
3197 size_t resp_ies_len;
3198 int res;
3199
3200 if (sm == NULL) {
3201 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
3202 "WPA SM not available");
3203 return;
3204 }
3205
3206 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
3207 " BSSID=" MACSTR " transaction=%d",
3208 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
3209 sm->ft_pending_cb = cb;
3210 sm->ft_pending_cb_ctx = ctx;
3211 sm->ft_pending_auth_transaction = auth_transaction;
3212 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3213 res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
3214 &resp_ies_len);
3215 if (res < 0) {
3216 wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
3217 return;
3218 }
3219 status = res;
3220
3221 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
3222 " auth_transaction=%d status=%u (%s)",
3223 MAC2STR(sm->addr), auth_transaction + 1, status,
3224 status2str(status));
3225 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3226 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
3227 resp_ies, resp_ies_len);
3228 os_free(resp_ies);
3229 }
3230
3231
3232 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
3233 size_t ies_len)
3234 {
3235 struct wpa_ft_ies parse;
3236 struct rsn_mdie *mdie;
3237 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
3238 size_t mic_len = 16;
3239 unsigned int count;
3240 const u8 *kck;
3241 size_t kck_len;
3242 int use_sha384;
3243 const u8 *anonce, *snonce, *fte_mic;
3244 u8 fte_elem_count;
3245 int rsnxe_used;
3246 struct wpa_auth_config *conf;
3247
3248 if (sm == NULL)
3249 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3250
3251 conf = &sm->wpa_auth->conf;
3252 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3253
3254 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
3255
3256 if (wpa_ft_parse_ies(ies, ies_len, &parse, use_sha384) < 0) {
3257 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
3258 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3259 }
3260
3261 if (parse.rsn == NULL) {
3262 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
3263 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3264 }
3265
3266 if (parse.rsn_pmkid == NULL) {
3267 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
3268 return WLAN_STATUS_INVALID_PMKID;
3269 }
3270
3271 if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
3272 != 0) {
3273 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
3274 "with the PMKR1Name derived from auth request");
3275 return WLAN_STATUS_INVALID_PMKID;
3276 }
3277
3278 mdie = (struct rsn_mdie *) parse.mdie;
3279 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
3280 os_memcmp(mdie->mobility_domain, conf->mobility_domain,
3281 MOBILITY_DOMAIN_ID_LEN) != 0) {
3282 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
3283 return WLAN_STATUS_INVALID_MDIE;
3284 }
3285
3286 if (use_sha384) {
3287 struct rsn_ftie_sha384 *ftie;
3288
3289 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
3290 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3291 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3292 return WLAN_STATUS_INVALID_FTIE;
3293 }
3294
3295 anonce = ftie->anonce;
3296 snonce = ftie->snonce;
3297 rsnxe_used = ftie->mic_control[0] & 0x01;
3298 fte_elem_count = ftie->mic_control[1];
3299 fte_mic = ftie->mic;
3300 } else {
3301 struct rsn_ftie *ftie;
3302
3303 ftie = (struct rsn_ftie *) parse.ftie;
3304 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3305 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3306 return WLAN_STATUS_INVALID_FTIE;
3307 }
3308
3309 anonce = ftie->anonce;
3310 snonce = ftie->snonce;
3311 rsnxe_used = ftie->mic_control[0] & 0x01;
3312 fte_elem_count = ftie->mic_control[1];
3313 fte_mic = ftie->mic;
3314 }
3315
3316 if (os_memcmp(snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
3317 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
3318 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3319 snonce, WPA_NONCE_LEN);
3320 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
3321 sm->SNonce, WPA_NONCE_LEN);
3322 return WLAN_STATUS_INVALID_FTIE;
3323 }
3324
3325 if (os_memcmp(anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
3326 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
3327 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
3328 anonce, WPA_NONCE_LEN);
3329 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
3330 sm->ANonce, WPA_NONCE_LEN);
3331 return WLAN_STATUS_INVALID_FTIE;
3332 }
3333
3334
3335 if (parse.r0kh_id == NULL) {
3336 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
3337 return WLAN_STATUS_INVALID_FTIE;
3338 }
3339
3340 if (parse.r0kh_id_len != sm->r0kh_id_len ||
3341 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
3342 {
3343 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
3344 "the current R0KH-ID");
3345 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
3346 parse.r0kh_id, parse.r0kh_id_len);
3347 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
3348 sm->r0kh_id, sm->r0kh_id_len);
3349 return WLAN_STATUS_INVALID_FTIE;
3350 }
3351
3352 if (parse.r1kh_id == NULL) {
3353 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
3354 return WLAN_STATUS_INVALID_FTIE;
3355 }
3356
3357 if (os_memcmp_const(parse.r1kh_id, conf->r1_key_holder,
3358 FT_R1KH_ID_LEN) != 0) {
3359 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
3360 "ReassocReq");
3361 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
3362 parse.r1kh_id, FT_R1KH_ID_LEN);
3363 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
3364 conf->r1_key_holder, FT_R1KH_ID_LEN);
3365 return WLAN_STATUS_INVALID_FTIE;
3366 }
3367
3368 if (parse.rsn_pmkid == NULL ||
3369 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
3370 {
3371 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
3372 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
3373 return WLAN_STATUS_INVALID_PMKID;
3374 }
3375
3376 count = 3;
3377 if (parse.ric)
3378 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
3379 if (parse.rsnxe)
3380 count++;
3381 if (fte_elem_count != count) {
3382 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
3383 "Control: received %u expected %u",
3384 fte_elem_count, count);
3385 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3386 }
3387
3388 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
3389 kck = sm->PTK.kck2;
3390 kck_len = sm->PTK.kck2_len;
3391 } else {
3392 kck = sm->PTK.kck;
3393 kck_len = sm->PTK.kck_len;
3394 }
3395 if (wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 5,
3396 parse.mdie - 2, parse.mdie_len + 2,
3397 parse.ftie - 2, parse.ftie_len + 2,
3398 parse.rsn - 2, parse.rsn_len + 2,
3399 parse.ric, parse.ric_len,
3400 parse.rsnxe ? parse.rsnxe - 2 : NULL,
3401 parse.rsnxe ? parse.rsnxe_len + 2 : 0,
3402 mic) < 0) {
3403 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
3404 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3405 }
3406
3407 if (os_memcmp_const(mic, fte_mic, mic_len) != 0) {
3408 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
3409 wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
3410 MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
3411 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
3412 fte_mic, mic_len);
3413 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
3414 wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
3415 parse.mdie - 2, parse.mdie_len + 2);
3416 wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
3417 parse.ftie - 2, parse.ftie_len + 2);
3418 wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
3419 parse.rsn - 2, parse.rsn_len + 2);
3420 wpa_hexdump(MSG_MSGDUMP, "FT: RSNXE",
3421 parse.rsnxe ? parse.rsnxe - 2 : NULL,
3422 parse.rsnxe ? parse.rsnxe_len + 2 : 0);
3423 return WLAN_STATUS_INVALID_FTIE;
3424 }
3425
3426 if (rsnxe_used && (conf->sae_pwe == 1 || conf->sae_pwe == 2) &&
3427 !parse.rsnxe) {
3428 wpa_printf(MSG_INFO,
3429 "FT: FTE indicated that STA uses RSNXE, but RSNXE was not included");
3430 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3431 }
3432
3433 #ifdef CONFIG_OCV
3434 if (wpa_auth_uses_ocv(sm)) {
3435 struct wpa_channel_info ci;
3436 int tx_chanwidth;
3437 int tx_seg1_idx;
3438
3439 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3440 wpa_printf(MSG_WARNING,
3441 "Failed to get channel info to validate received OCI in (Re)Assoc Request");
3442 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3443 }
3444
3445 if (get_sta_tx_parameters(sm,
3446 channel_width_to_int(ci.chanwidth),
3447 ci.seg1_idx, &tx_chanwidth,
3448 &tx_seg1_idx) < 0)
3449 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3450
3451 if (ocv_verify_tx_params(parse.oci, parse.oci_len, &ci,
3452 tx_chanwidth, tx_seg1_idx) != 0) {
3453 wpa_printf(MSG_WARNING, "%s", ocv_errorstr);
3454 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3455 }
3456 }
3457 #endif /* CONFIG_OCV */
3458
3459 return WLAN_STATUS_SUCCESS;
3460 }
3461
3462
3463 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
3464 {
3465 const u8 *sta_addr, *target_ap;
3466 const u8 *ies;
3467 size_t ies_len;
3468 u8 action;
3469 struct ft_rrb_frame *frame;
3470
3471 if (sm == NULL)
3472 return -1;
3473
3474 /*
3475 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3476 * FT Request action frame body[variable]
3477 */
3478
3479 if (len < 14) {
3480 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
3481 "(len=%lu)", (unsigned long) len);
3482 return -1;
3483 }
3484
3485 action = data[1];
3486 sta_addr = data + 2;
3487 target_ap = data + 8;
3488 ies = data + 14;
3489 ies_len = len - 14;
3490
3491 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
3492 " Target AP=" MACSTR " Action=%d)",
3493 MAC2STR(sta_addr), MAC2STR(target_ap), action);
3494
3495 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
3496 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
3497 "STA=" MACSTR " STA-Address=" MACSTR,
3498 MAC2STR(sm->addr), MAC2STR(sta_addr));
3499 return -1;
3500 }
3501
3502 /*
3503 * Do some sanity checking on the target AP address (not own and not
3504 * broadcast. This could be extended to filter based on a list of known
3505 * APs in the MD (if such a list were configured).
3506 */
3507 if ((target_ap[0] & 0x01) ||
3508 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
3509 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
3510 "frame");
3511 return -1;
3512 }
3513
3514 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
3515
3516 if (!sm->wpa_auth->conf.ft_over_ds) {
3517 wpa_printf(MSG_DEBUG, "FT: Over-DS option disabled - reject");
3518 return -1;
3519 }
3520
3521 /* RRB - Forward action frame to the target AP */
3522 frame = os_malloc(sizeof(*frame) + len);
3523 if (frame == NULL)
3524 return -1;
3525 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3526 frame->packet_type = FT_PACKET_REQUEST;
3527 frame->action_length = host_to_le16(len);
3528 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
3529 os_memcpy(frame + 1, data, len);
3530
3531 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
3532 sizeof(*frame) + len);
3533 os_free(frame);
3534
3535 return 0;
3536 }
3537
3538
3539 static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
3540 u16 auth_transaction, u16 resp,
3541 const u8 *ies, size_t ies_len)
3542 {
3543 struct wpa_state_machine *sm = ctx;
3544 wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
3545 MAC2STR(sm->addr));
3546 wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
3547 WLAN_STATUS_SUCCESS, ies, ies_len);
3548 }
3549
3550
3551 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
3552 const u8 *current_ap, const u8 *sta_addr,
3553 const u8 *body, size_t len)
3554 {
3555 struct wpa_state_machine *sm;
3556 u16 status;
3557 u8 *resp_ies;
3558 size_t resp_ies_len;
3559 int res;
3560
3561 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
3562 if (sm == NULL) {
3563 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
3564 "RRB Request");
3565 return -1;
3566 }
3567
3568 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
3569
3570 sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
3571 sm->ft_pending_cb_ctx = sm;
3572 os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
3573 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3574 res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
3575 &resp_ies_len);
3576 if (res < 0) {
3577 wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
3578 return 0;
3579 }
3580 status = res;
3581
3582 res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
3583 resp_ies, resp_ies_len);
3584 os_free(resp_ies);
3585 return res;
3586 }
3587
3588
3589 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
3590 const u8 *current_ap, const u8 *sta_addr,
3591 u16 status, const u8 *resp_ies,
3592 size_t resp_ies_len)
3593 {
3594 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3595 size_t rlen;
3596 struct ft_rrb_frame *frame;
3597 u8 *pos;
3598
3599 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
3600 " CurrentAP=" MACSTR " status=%u (%s)",
3601 MAC2STR(sm->addr), MAC2STR(current_ap), status,
3602 status2str(status));
3603 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3604
3605 /* RRB - Forward action frame response to the Current AP */
3606
3607 /*
3608 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3609 * Status_Code[2] FT Request action frame body[variable]
3610 */
3611 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
3612
3613 frame = os_malloc(sizeof(*frame) + rlen);
3614 if (frame == NULL)
3615 return -1;
3616 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3617 frame->packet_type = FT_PACKET_RESPONSE;
3618 frame->action_length = host_to_le16(rlen);
3619 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
3620 pos = (u8 *) (frame + 1);
3621 *pos++ = WLAN_ACTION_FT;
3622 *pos++ = 2; /* Action: Response */
3623 os_memcpy(pos, sta_addr, ETH_ALEN);
3624 pos += ETH_ALEN;
3625 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
3626 pos += ETH_ALEN;
3627 WPA_PUT_LE16(pos, status);
3628 pos += 2;
3629 if (resp_ies)
3630 os_memcpy(pos, resp_ies, resp_ies_len);
3631
3632 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
3633 sizeof(*frame) + rlen);
3634 os_free(frame);
3635
3636 return 0;
3637 }
3638
3639
3640 static int wpa_ft_rrb_build_r0(const u8 *key, const size_t key_len,
3641 const struct tlv_list *tlvs,
3642 const struct wpa_ft_pmk_r0_sa *pmk_r0,
3643 const u8 *r1kh_id, const u8 *s1kh_id,
3644 const struct tlv_list *tlv_auth,
3645 const u8 *src_addr, u8 type,
3646 u8 **packet, size_t *packet_len)
3647 {
3648 u8 pmk_r1[PMK_LEN_MAX];
3649 size_t pmk_r1_len = pmk_r0->pmk_r0_len;
3650 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
3651 u8 f_pairwise[sizeof(le16)];
3652 u8 f_expires_in[sizeof(le16)];
3653 u8 f_session_timeout[sizeof(le32)];
3654 int expires_in;
3655 int session_timeout;
3656 struct os_reltime now;
3657 int ret;
3658 struct tlv_list sess_tlv[] = {
3659 { .type = FT_RRB_PMK_R1, .len = pmk_r1_len,
3660 .data = pmk_r1 },
3661 { .type = FT_RRB_PMK_R1_NAME, .len = sizeof(pmk_r1_name),
3662 .data = pmk_r1_name },
3663 { .type = FT_RRB_PAIRWISE, .len = sizeof(f_pairwise),
3664 .data = f_pairwise },
3665 { .type = FT_RRB_EXPIRES_IN, .len = sizeof(f_expires_in),
3666 .data = f_expires_in },
3667 { .type = FT_RRB_IDENTITY, .len = pmk_r0->identity_len,
3668 .data = pmk_r0->identity },
3669 { .type = FT_RRB_RADIUS_CUI, .len = pmk_r0->radius_cui_len,
3670 .data = pmk_r0->radius_cui },
3671 { .type = FT_RRB_SESSION_TIMEOUT,
3672 .len = sizeof(f_session_timeout),
3673 .data = f_session_timeout },
3674 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
3675 };
3676
3677 if (wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_len,
3678 pmk_r0->pmk_r0_name, r1kh_id,
3679 s1kh_id, pmk_r1, pmk_r1_name) < 0)
3680 return -1;
3681 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 (for peer AP)",
3682 pmk_r1, pmk_r1_len);
3683 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name (for peer AP)",
3684 pmk_r1_name, WPA_PMK_NAME_LEN);
3685 WPA_PUT_LE16(f_pairwise, pmk_r0->pairwise);
3686
3687 os_get_reltime(&now);
3688 if (pmk_r0->expiration > now.sec)
3689 expires_in = pmk_r0->expiration - now.sec;
3690 else if (pmk_r0->expiration)
3691 expires_in = 1;
3692 else
3693 expires_in = 0;
3694 WPA_PUT_LE16(f_expires_in, expires_in);
3695
3696 if (pmk_r0->session_timeout > now.sec)
3697 session_timeout = pmk_r0->session_timeout - now.sec;
3698 else if (pmk_r0->session_timeout)
3699 session_timeout = 1;
3700 else
3701 session_timeout = 0;
3702 WPA_PUT_LE32(f_session_timeout, session_timeout);
3703
3704 ret = wpa_ft_rrb_build(key, key_len, tlvs, sess_tlv, tlv_auth,
3705 pmk_r0->vlan, src_addr, type,
3706 packet, packet_len);
3707
3708 forced_memzero(pmk_r1, sizeof(pmk_r1));
3709
3710 return ret;
3711 }
3712
3713
3714 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
3715 const u8 *src_addr,
3716 const u8 *enc, size_t enc_len,
3717 const u8 *auth, size_t auth_len,
3718 int no_defer)
3719 {
3720 const char *msgtype = "pull request";
3721 u8 *plain = NULL, *packet = NULL;
3722 size_t plain_len = 0, packet_len = 0;
3723 struct ft_remote_r1kh *r1kh, *r1kh_wildcard;
3724 const u8 *key;
3725 size_t key_len;
3726 int seq_ret;
3727 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id, *f_s1kh_id, *f_pmk_r0_name;
3728 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len, f_s1kh_id_len;
3729 size_t f_pmk_r0_name_len;
3730 const struct wpa_ft_pmk_r0_sa *r0;
3731 int ret;
3732 struct tlv_list resp[2];
3733 struct tlv_list resp_auth[5];
3734 struct ft_rrb_seq f_seq;
3735
3736 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
3737
3738 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3739 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3740
3741 if (wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len)) {
3742 wpa_printf(MSG_DEBUG, "FT: R0KH-ID mismatch");
3743 goto out;
3744 }
3745
3746 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3747 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3748
3749 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh, &r1kh_wildcard);
3750 if (r1kh) {
3751 key = r1kh->key;
3752 key_len = sizeof(r1kh->key);
3753 } else if (r1kh_wildcard) {
3754 wpa_printf(MSG_DEBUG, "FT: Using wildcard R1KH-ID");
3755 key = r1kh_wildcard->key;
3756 key_len = sizeof(r1kh_wildcard->key);
3757 } else {
3758 goto out;
3759 }
3760
3761 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "pull request", FT_RRB_NONCE_LEN);
3762 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
3763
3764 seq_ret = FT_RRB_SEQ_DROP;
3765 if (r1kh)
3766 seq_ret = wpa_ft_rrb_seq_chk(r1kh->seq, src_addr, enc, enc_len,
3767 auth, auth_len, msgtype, no_defer);
3768 if (!no_defer && r1kh_wildcard &&
3769 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
3770 /* wildcard: r1kh-id unknown or changed addr -> do a seq req */
3771 seq_ret = FT_RRB_SEQ_DEFER;
3772 }
3773
3774 if (seq_ret == FT_RRB_SEQ_DROP)
3775 goto out;
3776
3777 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3778 src_addr, FT_PACKET_R0KH_R1KH_PULL,
3779 &plain, &plain_len) < 0)
3780 goto out;
3781
3782 if (!r1kh)
3783 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard, src_addr,
3784 f_r1kh_id,
3785 wpa_auth->conf.rkh_pos_timeout);
3786 if (!r1kh)
3787 goto out;
3788
3789 if (seq_ret == FT_RRB_SEQ_DEFER) {
3790 wpa_ft_rrb_seq_req(wpa_auth, r1kh->seq, src_addr, f_r0kh_id,
3791 f_r0kh_id_len, f_r1kh_id, key, key_len,
3792 enc, enc_len, auth, auth_len,
3793 &wpa_ft_rrb_rx_pull);
3794 goto out;
3795 }
3796
3797 wpa_ft_rrb_seq_accept(wpa_auth, r1kh->seq, src_addr, auth, auth_len,
3798 msgtype);
3799 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
3800 wpa_auth->conf.rkh_pos_timeout);
3801
3802 RRB_GET(FT_RRB_PMK_R0_NAME, pmk_r0_name, msgtype, WPA_PMK_NAME_LEN);
3803 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", f_pmk_r0_name,
3804 f_pmk_r0_name_len);
3805
3806 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3807 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3808
3809 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
3810 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
3811 goto out;
3812 }
3813
3814 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull response from " MACSTR
3815 " to " MACSTR,
3816 MAC2STR(wpa_auth->addr), MAC2STR(src_addr));
3817
3818 resp[0].type = FT_RRB_S1KH_ID;
3819 resp[0].len = f_s1kh_id_len;
3820 resp[0].data = f_s1kh_id;
3821 resp[1].type = FT_RRB_LAST_EMPTY;
3822 resp[1].len = 0;
3823 resp[1].data = NULL;
3824
3825 resp_auth[0].type = FT_RRB_NONCE;
3826 resp_auth[0].len = f_nonce_len;
3827 resp_auth[0].data = f_nonce;
3828 resp_auth[1].type = FT_RRB_SEQ;
3829 resp_auth[1].len = sizeof(f_seq);
3830 resp_auth[1].data = (u8 *) &f_seq;
3831 resp_auth[2].type = FT_RRB_R0KH_ID;
3832 resp_auth[2].len = f_r0kh_id_len;
3833 resp_auth[2].data = f_r0kh_id;
3834 resp_auth[3].type = FT_RRB_R1KH_ID;
3835 resp_auth[3].len = f_r1kh_id_len;
3836 resp_auth[3].data = f_r1kh_id;
3837 resp_auth[4].type = FT_RRB_LAST_EMPTY;
3838 resp_auth[4].len = 0;
3839 resp_auth[4].data = NULL;
3840
3841 if (wpa_ft_fetch_pmk_r0(wpa_auth, f_s1kh_id, f_pmk_r0_name, &r0) < 0) {
3842 wpa_printf(MSG_DEBUG, "FT: No matching PMK-R0-Name found");
3843 ret = wpa_ft_rrb_build(key, key_len, resp, NULL, resp_auth,
3844 NULL, wpa_auth->addr,
3845 FT_PACKET_R0KH_R1KH_RESP,
3846 &packet, &packet_len);
3847 } else {
3848 ret = wpa_ft_rrb_build_r0(key, key_len, resp, r0, f_r1kh_id,
3849 f_s1kh_id, resp_auth, wpa_auth->addr,
3850 FT_PACKET_R0KH_R1KH_RESP,
3851 &packet, &packet_len);
3852 }
3853
3854 if (!ret)
3855 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
3856 FT_PACKET_R0KH_R1KH_RESP, packet,
3857 packet_len);
3858
3859 out:
3860 os_free(plain);
3861 os_free(packet);
3862
3863 return 0;
3864 }
3865
3866
3867 /* @returns 0 on success
3868 * -1 on error
3869 * -2 if FR_RRB_PAIRWISE is missing
3870 */
3871 static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth,
3872 const u8 *src_addr, u8 type,
3873 const u8 *enc, size_t enc_len,
3874 const u8 *auth, size_t auth_len,
3875 const char *msgtype, u8 *s1kh_id_out,
3876 int (*cb)(struct wpa_authenticator *wpa_auth,
3877 const u8 *src_addr,
3878 const u8 *enc, size_t enc_len,
3879 const u8 *auth, size_t auth_len,
3880 int no_defer))
3881 {
3882 u8 *plain = NULL;
3883 size_t plain_len = 0;
3884 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
3885 const u8 *key;
3886 size_t key_len;
3887 int seq_ret;
3888 const u8 *f_r1kh_id, *f_s1kh_id, *f_r0kh_id;
3889 const u8 *f_pmk_r1_name, *f_pairwise, *f_pmk_r1;
3890 const u8 *f_expires_in;
3891 size_t f_r1kh_id_len, f_s1kh_id_len, f_r0kh_id_len;
3892 const u8 *f_identity, *f_radius_cui;
3893 const u8 *f_session_timeout;
3894 size_t f_pmk_r1_name_len, f_pairwise_len, f_pmk_r1_len;
3895 size_t f_expires_in_len;
3896 size_t f_identity_len, f_radius_cui_len;
3897 size_t f_session_timeout_len;
3898 int pairwise;
3899 int ret = -1;
3900 int expires_in;
3901 int session_timeout;
3902 struct vlan_description vlan;
3903 size_t pmk_r1_len;
3904
3905 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3906 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3907
3908 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3909 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3910
3911 if (wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id)) {
3912 wpa_printf(MSG_DEBUG, "FT: R1KH-ID mismatch");
3913 goto out;
3914 }
3915
3916 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, &r0kh,
3917 &r0kh_wildcard);
3918 if (r0kh) {
3919 key = r0kh->key;
3920 key_len = sizeof(r0kh->key);
3921 } else if (r0kh_wildcard) {
3922 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
3923 key = r0kh_wildcard->key;
3924 key_len = sizeof(r0kh_wildcard->key);
3925 } else {
3926 goto out;
3927 }
3928
3929 seq_ret = FT_RRB_SEQ_DROP;
3930 if (r0kh) {
3931 seq_ret = wpa_ft_rrb_seq_chk(r0kh->seq, src_addr, enc, enc_len,
3932 auth, auth_len, msgtype,
3933 cb ? 0 : 1);
3934 }
3935 if (cb && r0kh_wildcard &&
3936 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
3937 /* wildcard: r0kh-id unknown or changed addr -> do a seq req */
3938 seq_ret = FT_RRB_SEQ_DEFER;
3939 }
3940
3941 if (seq_ret == FT_RRB_SEQ_DROP)
3942 goto out;
3943
3944 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3945 src_addr, type, &plain, &plain_len) < 0)
3946 goto out;
3947
3948 if (!r0kh)
3949 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, src_addr,
3950 f_r0kh_id, f_r0kh_id_len,
3951 wpa_auth->conf.rkh_pos_timeout);
3952 if (!r0kh)
3953 goto out;
3954
3955 if (seq_ret == FT_RRB_SEQ_DEFER) {
3956 wpa_ft_rrb_seq_req(wpa_auth, r0kh->seq, src_addr, f_r0kh_id,
3957 f_r0kh_id_len, f_r1kh_id, key, key_len,
3958 enc, enc_len, auth, auth_len, cb);
3959 goto out;
3960 }
3961
3962 wpa_ft_rrb_seq_accept(wpa_auth, r0kh->seq, src_addr, auth, auth_len,
3963 msgtype);
3964 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
3965 wpa_auth->conf.rkh_pos_timeout);
3966
3967 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3968 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3969
3970 if (s1kh_id_out)
3971 os_memcpy(s1kh_id_out, f_s1kh_id, ETH_ALEN);
3972
3973 ret = -2;
3974 RRB_GET(FT_RRB_PAIRWISE, pairwise, msgtype, sizeof(le16));
3975 wpa_hexdump(MSG_DEBUG, "FT: pairwise", f_pairwise, f_pairwise_len);
3976
3977 ret = -1;
3978 RRB_GET(FT_RRB_PMK_R1_NAME, pmk_r1_name, msgtype, WPA_PMK_NAME_LEN);
3979 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
3980 f_pmk_r1_name, WPA_PMK_NAME_LEN);
3981
3982 pmk_r1_len = PMK_LEN;
3983 if (wpa_ft_rrb_get_tlv(plain, plain_len, FT_RRB_PMK_R1, &f_pmk_r1_len,
3984 &f_pmk_r1) == 0 &&
3985 (f_pmk_r1_len == PMK_LEN || f_pmk_r1_len == SHA384_MAC_LEN))
3986 pmk_r1_len = f_pmk_r1_len;
3987 RRB_GET(FT_RRB_PMK_R1, pmk_r1, msgtype, pmk_r1_len);
3988 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f_pmk_r1, pmk_r1_len);
3989
3990 pairwise = WPA_GET_LE16(f_pairwise);
3991
3992 RRB_GET_OPTIONAL(FT_RRB_EXPIRES_IN, expires_in, msgtype,
3993 sizeof(le16));
3994 if (f_expires_in)
3995 expires_in = WPA_GET_LE16(f_expires_in);
3996 else
3997 expires_in = 0;
3998
3999 wpa_printf(MSG_DEBUG, "FT: PMK-R1 %s - expires_in=%d", msgtype,
4000 expires_in);
4001
4002 if (wpa_ft_rrb_get_tlv_vlan(plain, plain_len, &vlan) < 0) {
4003 wpa_printf(MSG_DEBUG, "FT: Cannot parse vlan");
4004 wpa_ft_rrb_dump(plain, plain_len);
4005 goto out;
4006 }
4007
4008 wpa_printf(MSG_DEBUG, "FT: vlan %d%s",
4009 le_to_host16(vlan.untagged), vlan.tagged[0] ? "+" : "");
4010
4011 RRB_GET_OPTIONAL(FT_RRB_IDENTITY, identity, msgtype, -1);
4012 if (f_identity)
4013 wpa_hexdump_ascii(MSG_DEBUG, "FT: Identity", f_identity,
4014 f_identity_len);
4015
4016 RRB_GET_OPTIONAL(FT_RRB_RADIUS_CUI, radius_cui, msgtype, -1);
4017 if (f_radius_cui)
4018 wpa_hexdump_ascii(MSG_DEBUG, "FT: CUI", f_radius_cui,
4019 f_radius_cui_len);
4020
4021 RRB_GET_OPTIONAL(FT_RRB_SESSION_TIMEOUT, session_timeout, msgtype,
4022 sizeof(le32));
4023 if (f_session_timeout)
4024 session_timeout = WPA_GET_LE32(f_session_timeout);
4025 else
4026 session_timeout = 0;
4027 wpa_printf(MSG_DEBUG, "FT: session_timeout %d", session_timeout);
4028
4029 if (wpa_ft_store_pmk_r1(wpa_auth, f_s1kh_id, f_pmk_r1, pmk_r1_len,
4030 f_pmk_r1_name,
4031 pairwise, &vlan, expires_in, session_timeout,
4032 f_identity, f_identity_len, f_radius_cui,
4033 f_radius_cui_len) < 0)
4034 goto out;
4035
4036 ret = 0;
4037 out:
4038 bin_clear_free(plain, plain_len);
4039
4040 return ret;
4041
4042 }
4043
4044
4045 static void ft_finish_pull(struct wpa_state_machine *sm)
4046 {
4047 int res;
4048 u8 *resp_ies;
4049 size_t resp_ies_len;
4050 u16 status;
4051
4052 if (!sm->ft_pending_cb || !sm->ft_pending_req_ies)
4053 return;
4054
4055 res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
4056 wpabuf_len(sm->ft_pending_req_ies),
4057 &resp_ies, &resp_ies_len);
4058 if (res < 0) {
4059 /* this loop is broken by ft_pending_pull_left_retries */
4060 wpa_printf(MSG_DEBUG,
4061 "FT: Callback postponed until response is available");
4062 return;
4063 }
4064 wpabuf_free(sm->ft_pending_req_ies);
4065 sm->ft_pending_req_ies = NULL;
4066 status = res;
4067 wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
4068 " - status %u", MAC2STR(sm->addr), status);
4069
4070 sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
4071 sm->ft_pending_auth_transaction + 1, status,
4072 resp_ies, resp_ies_len);
4073 os_free(resp_ies);
4074 }
4075
4076
4077 struct ft_get_sta_ctx {
4078 const u8 *nonce;
4079 const u8 *s1kh_id;
4080 struct wpa_state_machine *sm;
4081 };
4082
4083
4084 static int ft_get_sta_cb(struct wpa_state_machine *sm, void *ctx)
4085 {
4086 struct ft_get_sta_ctx *info = ctx;
4087
4088 if ((info->s1kh_id &&
4089 os_memcmp(info->s1kh_id, sm->addr, ETH_ALEN) != 0) ||
4090 os_memcmp(info->nonce, sm->ft_pending_pull_nonce,
4091 FT_RRB_NONCE_LEN) != 0 ||
4092 sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
4093 return 0;
4094
4095 info->sm = sm;
4096
4097 return 1;
4098 }
4099
4100
4101 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
4102 const u8 *src_addr,
4103 const u8 *enc, size_t enc_len,
4104 const u8 *auth, size_t auth_len,
4105 int no_defer)
4106 {
4107 const char *msgtype = "pull response";
4108 int nak, ret = -1;
4109 struct ft_get_sta_ctx ctx;
4110 u8 s1kh_id[ETH_ALEN];
4111 const u8 *f_nonce;
4112 size_t f_nonce_len;
4113
4114 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
4115
4116 RRB_GET_AUTH(FT_RRB_NONCE, nonce, msgtype, FT_RRB_NONCE_LEN);
4117 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
4118
4119 os_memset(&ctx, 0, sizeof(ctx));
4120 ctx.nonce = f_nonce;
4121 if (!wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
4122 /* nonce not found */
4123 wpa_printf(MSG_DEBUG, "FT: Invalid nonce");
4124 return -1;
4125 }
4126
4127 ret = wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_RESP,
4128 enc, enc_len, auth, auth_len, msgtype, s1kh_id,
4129 no_defer ? NULL : &wpa_ft_rrb_rx_resp);
4130 if (ret == -2) {
4131 ret = 0;
4132 nak = 1;
4133 } else {
4134 nak = 0;
4135 }
4136 if (ret < 0)
4137 return -1;
4138
4139 ctx.s1kh_id = s1kh_id;
4140 if (wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
4141 wpa_printf(MSG_DEBUG,
4142 "FT: Response to a pending pull request for " MACSTR,
4143 MAC2STR(ctx.sm->addr));
4144 eloop_cancel_timeout(wpa_ft_expire_pull, ctx.sm, NULL);
4145 if (nak)
4146 ctx.sm->ft_pending_pull_left_retries = 0;
4147 ft_finish_pull(ctx.sm);
4148 }
4149
4150 out:
4151 return ret;
4152 }
4153
4154
4155 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
4156 const u8 *src_addr,
4157 const u8 *enc, size_t enc_len,
4158 const u8 *auth, size_t auth_len, int no_defer)
4159 {
4160 const char *msgtype = "push";
4161
4162 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
4163
4164 if (wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_PUSH,
4165 enc, enc_len, auth, auth_len, msgtype, NULL,
4166 no_defer ? NULL : wpa_ft_rrb_rx_push) < 0)
4167 return -1;
4168
4169 return 0;
4170 }
4171
4172
4173 static int wpa_ft_rrb_rx_seq(struct wpa_authenticator *wpa_auth,
4174 const u8 *src_addr, int type,
4175 const u8 *enc, size_t enc_len,
4176 const u8 *auth, size_t auth_len,
4177 struct ft_remote_seq **rkh_seq,
4178 u8 **key, size_t *key_len,
4179 struct ft_remote_r0kh **r0kh_out,
4180 struct ft_remote_r1kh **r1kh_out,
4181 struct ft_remote_r0kh **r0kh_wildcard_out,
4182 struct ft_remote_r1kh **r1kh_wildcard_out)
4183 {
4184 struct ft_remote_r0kh *r0kh = NULL;
4185 struct ft_remote_r1kh *r1kh = NULL;
4186 const u8 *f_r0kh_id, *f_r1kh_id;
4187 size_t f_r0kh_id_len, f_r1kh_id_len;
4188 int to_r0kh, to_r1kh;
4189 u8 *plain = NULL;
4190 size_t plain_len = 0;
4191 struct ft_remote_r0kh *r0kh_wildcard;
4192 struct ft_remote_r1kh *r1kh_wildcard;
4193
4194 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4195 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4196
4197 to_r0kh = !wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len);
4198 to_r1kh = !wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id);
4199
4200 if (to_r0kh && to_r1kh) {
4201 wpa_printf(MSG_DEBUG, "FT: seq - local R0KH-ID and R1KH-ID");
4202 goto out;
4203 }
4204
4205 if (!to_r0kh && !to_r1kh) {
4206 wpa_printf(MSG_DEBUG, "FT: seq - remote R0KH-ID and R1KH-ID");
4207 goto out;
4208 }
4209
4210 if (!to_r0kh) {
4211 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
4212 &r0kh, &r0kh_wildcard);
4213 if (!r0kh_wildcard &&
4214 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
4215 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
4216 f_r0kh_id, f_r0kh_id_len);
4217 goto out;
4218 }
4219 if (r0kh) {
4220 *key = r0kh->key;
4221 *key_len = sizeof(r0kh->key);
4222 } else {
4223 *key = r0kh_wildcard->key;
4224 *key_len = sizeof(r0kh_wildcard->key);
4225 }
4226 }
4227
4228 if (!to_r1kh) {
4229 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh,
4230 &r1kh_wildcard);
4231 if (!r1kh_wildcard &&
4232 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
4233 wpa_hexdump(MSG_DEBUG, "FT: Did not find R1KH-ID",
4234 f_r1kh_id, FT_R1KH_ID_LEN);
4235 goto out;
4236 }
4237 if (r1kh) {
4238 *key = r1kh->key;
4239 *key_len = sizeof(r1kh->key);
4240 } else {
4241 *key = r1kh_wildcard->key;
4242 *key_len = sizeof(r1kh_wildcard->key);
4243 }
4244 }
4245
4246 if (wpa_ft_rrb_decrypt(*key, *key_len, enc, enc_len, auth, auth_len,
4247 src_addr, type, &plain, &plain_len) < 0)
4248 goto out;
4249
4250 os_free(plain);
4251
4252 if (!to_r0kh) {
4253 if (!r0kh)
4254 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard,
4255 src_addr, f_r0kh_id,
4256 f_r0kh_id_len,
4257 ftRRBseqTimeout);
4258 if (!r0kh)
4259 goto out;
4260
4261 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, ftRRBseqTimeout);
4262 *rkh_seq = r0kh->seq;
4263 if (r0kh_out)
4264 *r0kh_out = r0kh;
4265 if (r0kh_wildcard_out)
4266 *r0kh_wildcard_out = r0kh_wildcard;
4267 }
4268
4269 if (!to_r1kh) {
4270 if (!r1kh)
4271 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard,
4272 src_addr, f_r1kh_id,
4273 ftRRBseqTimeout);
4274 if (!r1kh)
4275 goto out;
4276
4277 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, ftRRBseqTimeout);
4278 *rkh_seq = r1kh->seq;
4279 if (r1kh_out)
4280 *r1kh_out = r1kh;
4281 if (r1kh_wildcard_out)
4282 *r1kh_wildcard_out = r1kh_wildcard;
4283 }
4284
4285 return 0;
4286 out:
4287 return -1;
4288 }
4289
4290
4291 static int wpa_ft_rrb_rx_seq_req(struct wpa_authenticator *wpa_auth,
4292 const u8 *src_addr,
4293 const u8 *enc, size_t enc_len,
4294 const u8 *auth, size_t auth_len,
4295 int no_defer)
4296 {
4297 int ret = -1;
4298 struct ft_rrb_seq f_seq;
4299 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id;
4300 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len;
4301 struct ft_remote_seq *rkh_seq = NULL;
4302 u8 *packet = NULL, *key = NULL;
4303 size_t packet_len = 0, key_len = 0;
4304 struct tlv_list seq_resp_auth[5];
4305
4306 wpa_printf(MSG_DEBUG, "FT: Received sequence number request");
4307
4308 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
4309 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4310 &key_len, NULL, NULL, NULL, NULL) < 0)
4311 goto out;
4312
4313 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq request", FT_RRB_NONCE_LEN);
4314 wpa_hexdump(MSG_DEBUG, "FT: seq request - nonce", f_nonce, f_nonce_len);
4315
4316 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4317 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4318
4319 if (wpa_ft_new_seq(rkh_seq, &f_seq) < 0) {
4320 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4321 goto out;
4322 }
4323
4324 wpa_printf(MSG_DEBUG, "FT: Send sequence number response from " MACSTR
4325 " to " MACSTR,
4326 MAC2STR(wpa_auth->addr), MAC2STR(src_addr));
4327
4328 seq_resp_auth[0].type = FT_RRB_NONCE;
4329 seq_resp_auth[0].len = f_nonce_len;
4330 seq_resp_auth[0].data = f_nonce;
4331 seq_resp_auth[1].type = FT_RRB_SEQ;
4332 seq_resp_auth[1].len = sizeof(f_seq);
4333 seq_resp_auth[1].data = (u8 *) &f_seq;
4334 seq_resp_auth[2].type = FT_RRB_R0KH_ID;
4335 seq_resp_auth[2].len = f_r0kh_id_len;
4336 seq_resp_auth[2].data = f_r0kh_id;
4337 seq_resp_auth[3].type = FT_RRB_R1KH_ID;
4338 seq_resp_auth[3].len = FT_R1KH_ID_LEN;
4339 seq_resp_auth[3].data = f_r1kh_id;
4340 seq_resp_auth[4].type = FT_RRB_LAST_EMPTY;
4341 seq_resp_auth[4].len = 0;
4342 seq_resp_auth[4].data = NULL;
4343
4344 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_resp_auth, NULL,
4345 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4346 &packet, &packet_len) < 0)
4347 goto out;
4348
4349 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
4350 FT_PACKET_R0KH_R1KH_SEQ_RESP, packet,
4351 packet_len);
4352
4353 out:
4354 os_free(packet);
4355
4356 return ret;
4357 }
4358
4359
4360 static int wpa_ft_rrb_rx_seq_resp(struct wpa_authenticator *wpa_auth,
4361 const u8 *src_addr,
4362 const u8 *enc, size_t enc_len,
4363 const u8 *auth, size_t auth_len,
4364 int no_defer)
4365 {
4366 u8 *key = NULL;
4367 size_t key_len = 0;
4368 struct ft_remote_r0kh *r0kh = NULL, *r0kh_wildcard = NULL;
4369 struct ft_remote_r1kh *r1kh = NULL, *r1kh_wildcard = NULL;
4370 const u8 *f_nonce, *f_seq;
4371 size_t f_nonce_len, f_seq_len;
4372 struct ft_remote_seq *rkh_seq = NULL;
4373 struct ft_remote_item *item;
4374 struct os_reltime now, now_remote;
4375 int seq_ret, found;
4376 const struct ft_rrb_seq *msg_both;
4377 u32 msg_dom, msg_seq;
4378
4379 wpa_printf(MSG_DEBUG, "FT: Received sequence number response");
4380
4381 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4382 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4383 &key_len, &r0kh, &r1kh, &r0kh_wildcard,
4384 &r1kh_wildcard) < 0)
4385 goto out;
4386
4387 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq response", FT_RRB_NONCE_LEN);
4388 wpa_hexdump(MSG_DEBUG, "FT: seq response - nonce", f_nonce,
4389 f_nonce_len);
4390
4391 found = 0;
4392 dl_list_for_each(item, &rkh_seq->rx.queue, struct ft_remote_item,
4393 list) {
4394 if (os_memcmp_const(f_nonce, item->nonce,
4395 FT_RRB_NONCE_LEN) != 0 ||
4396 os_get_reltime(&now) < 0 ||
4397 os_reltime_expired(&now, &item->nonce_ts, ftRRBseqTimeout))
4398 continue;
4399
4400 found = 1;
4401 break;
4402 }
4403 if (!found) {
4404 wpa_printf(MSG_DEBUG, "FT: seq response - bad nonce");
4405 goto out;
4406 }
4407
4408 if (r0kh) {
4409 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
4410 wpa_auth->conf.rkh_pos_timeout);
4411 if (r0kh_wildcard)
4412 os_memcpy(r0kh->addr, src_addr, ETH_ALEN);
4413 }
4414
4415 if (r1kh) {
4416 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
4417 wpa_auth->conf.rkh_pos_timeout);
4418 if (r1kh_wildcard)
4419 os_memcpy(r1kh->addr, src_addr, ETH_ALEN);
4420 }
4421
4422 seq_ret = wpa_ft_rrb_seq_chk(rkh_seq, src_addr, enc, enc_len, auth,
4423 auth_len, "seq response", 1);
4424 if (seq_ret == FT_RRB_SEQ_OK) {
4425 wpa_printf(MSG_DEBUG, "FT: seq response - valid seq number");
4426 wpa_ft_rrb_seq_accept(wpa_auth, rkh_seq, src_addr, auth,
4427 auth_len, "seq response");
4428 } else {
4429 wpa_printf(MSG_DEBUG, "FT: seq response - reset seq number");
4430
4431 RRB_GET_AUTH(FT_RRB_SEQ, seq, "seq response",
4432 sizeof(*msg_both));
4433 msg_both = (const struct ft_rrb_seq *) f_seq;
4434
4435 msg_dom = le_to_host32(msg_both->dom);
4436 msg_seq = le_to_host32(msg_both->seq);
4437 now_remote.sec = le_to_host32(msg_both->ts);
4438 now_remote.usec = 0;
4439
4440 rkh_seq->rx.num_last = 2;
4441 rkh_seq->rx.dom = msg_dom;
4442 rkh_seq->rx.offsetidx = 0;
4443 /* Accept some older, possibly cached packets as well */
4444 rkh_seq->rx.last[0] = msg_seq - FT_REMOTE_SEQ_BACKLOG -
4445 dl_list_len(&rkh_seq->rx.queue);
4446 rkh_seq->rx.last[1] = msg_seq;
4447
4448 /* local time - offset = remote time
4449 * <=> local time - remote time = offset */
4450 os_reltime_sub(&now, &now_remote, &rkh_seq->rx.time_offset);
4451 }
4452
4453 wpa_ft_rrb_seq_flush(wpa_auth, rkh_seq, 1);
4454
4455 return 0;
4456 out:
4457 return -1;
4458 }
4459
4460
4461 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4462 const u8 *data, size_t data_len)
4463 {
4464 struct ft_rrb_frame *frame;
4465 u16 alen;
4466 const u8 *pos, *end, *start;
4467 u8 action;
4468 const u8 *sta_addr, *target_ap_addr;
4469
4470 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
4471 MAC2STR(src_addr));
4472
4473 if (data_len < sizeof(*frame)) {
4474 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
4475 (unsigned long) data_len);
4476 return -1;
4477 }
4478
4479 pos = data;
4480 frame = (struct ft_rrb_frame *) pos;
4481 pos += sizeof(*frame);
4482
4483 alen = le_to_host16(frame->action_length);
4484 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
4485 "action_length=%d ap_address=" MACSTR,
4486 frame->frame_type, frame->packet_type, alen,
4487 MAC2STR(frame->ap_address));
4488
4489 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
4490 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
4491 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
4492 "unrecognized type %d", frame->frame_type);
4493 return -1;
4494 }
4495
4496 if (alen > data_len - sizeof(*frame)) {
4497 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
4498 "frame");
4499 return -1;
4500 }
4501
4502 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
4503
4504 if (alen < 1 + 1 + 2 * ETH_ALEN) {
4505 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
4506 "room for Action Frame body); alen=%lu",
4507 (unsigned long) alen);
4508 return -1;
4509 }
4510 start = pos;
4511 end = pos + alen;
4512
4513 if (*pos != WLAN_ACTION_FT) {
4514 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
4515 "%d", *pos);
4516 return -1;
4517 }
4518
4519 pos++;
4520 action = *pos++;
4521 sta_addr = pos;
4522 pos += ETH_ALEN;
4523 target_ap_addr = pos;
4524 pos += ETH_ALEN;
4525 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
4526 MACSTR " target_ap_addr=" MACSTR,
4527 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
4528
4529 if (frame->packet_type == FT_PACKET_REQUEST) {
4530 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
4531
4532 if (action != 1) {
4533 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
4534 "RRB Request", action);
4535 return -1;
4536 }
4537
4538 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
4539 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
4540 "RRB Request does not match with own "
4541 "address");
4542 return -1;
4543 }
4544
4545 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
4546 sta_addr, pos, end - pos) < 0)
4547 return -1;
4548 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
4549 u16 status_code;
4550
4551 if (end - pos < 2) {
4552 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
4553 "code in RRB Response");
4554 return -1;
4555 }
4556 status_code = WPA_GET_LE16(pos);
4557 pos += 2;
4558
4559 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
4560 "(status_code=%d)", status_code);
4561
4562 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
4563 return -1;
4564 } else {
4565 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
4566 "packet_type %d", frame->packet_type);
4567 return -1;
4568 }
4569
4570 if (end > pos) {
4571 wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end",
4572 pos, end - pos);
4573 }
4574
4575 return 0;
4576 }
4577
4578
4579 void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4580 const u8 *dst_addr, u8 oui_suffix, const u8 *data,
4581 size_t data_len)
4582 {
4583 const u8 *auth, *enc;
4584 size_t alen, elen;
4585 int no_defer = 0;
4586
4587 wpa_printf(MSG_DEBUG, "FT: RRB-OUI(" MACSTR
4588 ") received frame from remote AP "
4589 MACSTR " oui_suffix=%u dst=" MACSTR,
4590 MAC2STR(wpa_auth->addr), MAC2STR(src_addr), oui_suffix,
4591 MAC2STR(dst_addr));
4592 wpa_hexdump(MSG_MSGDUMP, "FT: RRB frame payload", data, data_len);
4593
4594 if (is_multicast_ether_addr(src_addr)) {
4595 wpa_printf(MSG_DEBUG,
4596 "FT: RRB-OUI received frame from multicast address "
4597 MACSTR, MAC2STR(src_addr));
4598 return;
4599 }
4600
4601 if (is_multicast_ether_addr(dst_addr))
4602 no_defer = 1;
4603
4604 if (data_len < sizeof(u16)) {
4605 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4606 return;
4607 }
4608
4609 alen = WPA_GET_LE16(data);
4610 if (data_len < sizeof(u16) + alen) {
4611 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4612 return;
4613 }
4614
4615 auth = data + sizeof(u16);
4616 wpa_hexdump(MSG_MSGDUMP, "FT: Authenticated payload", auth, alen);
4617 enc = data + sizeof(u16) + alen;
4618 elen = data_len - sizeof(u16) - alen;
4619 wpa_hexdump(MSG_MSGDUMP, "FT: Encrypted payload", enc, elen);
4620
4621 switch (oui_suffix) {
4622 case FT_PACKET_R0KH_R1KH_PULL:
4623 wpa_ft_rrb_rx_pull(wpa_auth, src_addr, enc, elen, auth, alen,
4624 no_defer);
4625 break;
4626 case FT_PACKET_R0KH_R1KH_RESP:
4627 wpa_ft_rrb_rx_resp(wpa_auth, src_addr, enc, elen, auth, alen,
4628 no_defer);
4629 break;
4630 case FT_PACKET_R0KH_R1KH_PUSH:
4631 wpa_ft_rrb_rx_push(wpa_auth, src_addr, enc, elen, auth, alen,
4632 no_defer);
4633 break;
4634 case FT_PACKET_R0KH_R1KH_SEQ_REQ:
4635 wpa_ft_rrb_rx_seq_req(wpa_auth, src_addr, enc, elen, auth, alen,
4636 no_defer);
4637 break;
4638 case FT_PACKET_R0KH_R1KH_SEQ_RESP:
4639 wpa_ft_rrb_rx_seq_resp(wpa_auth, src_addr, enc, elen, auth,
4640 alen, no_defer);
4641 break;
4642 }
4643 }
4644
4645
4646 static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
4647 struct wpa_ft_pmk_r0_sa *pmk_r0,
4648 struct ft_remote_r1kh *r1kh,
4649 const u8 *s1kh_id)
4650 {
4651 u8 *packet;
4652 size_t packet_len;
4653 struct ft_rrb_seq f_seq;
4654 struct tlv_list push[] = {
4655 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
4656 .data = s1kh_id },
4657 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
4658 .data = pmk_r0->pmk_r0_name },
4659 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4660 };
4661 struct tlv_list push_auth[] = {
4662 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
4663 .data = (u8 *) &f_seq },
4664 { .type = FT_RRB_R0KH_ID,
4665 .len = wpa_auth->conf.r0_key_holder_len,
4666 .data = wpa_auth->conf.r0_key_holder },
4667 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
4668 .data = r1kh->id },
4669 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4670 };
4671
4672 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
4673 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4674 return -1;
4675 }
4676
4677 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 push from " MACSTR
4678 " to remote R0KH address " MACSTR,
4679 MAC2STR(wpa_auth->addr), MAC2STR(r1kh->addr));
4680
4681 if (wpa_ft_rrb_build_r0(r1kh->key, sizeof(r1kh->key), push, pmk_r0,
4682 r1kh->id, s1kh_id, push_auth, wpa_auth->addr,
4683 FT_PACKET_R0KH_R1KH_PUSH,
4684 &packet, &packet_len) < 0)
4685 return -1;
4686
4687 wpa_ft_rrb_oui_send(wpa_auth, r1kh->addr, FT_PACKET_R0KH_R1KH_PUSH,
4688 packet, packet_len);
4689
4690 os_free(packet);
4691 return 0;
4692 }
4693
4694
4695 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
4696 {
4697 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
4698 struct wpa_ft_pmk_r0_sa *r0, *r0found = NULL;
4699 struct ft_remote_r1kh *r1kh;
4700
4701 if (!wpa_auth->conf.pmk_r1_push)
4702 return;
4703 if (!wpa_auth->conf.r1kh_list)
4704 return;
4705
4706 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
4707 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) {
4708 r0found = r0;
4709 break;
4710 }
4711 }
4712
4713 r0 = r0found;
4714 if (r0 == NULL || r0->pmk_r1_pushed)
4715 return;
4716 r0->pmk_r1_pushed = 1;
4717
4718 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
4719 "for STA " MACSTR, MAC2STR(addr));
4720
4721 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
4722 if (is_zero_ether_addr(r1kh->addr) ||
4723 is_zero_ether_addr(r1kh->id))
4724 continue;
4725 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
4726 continue;
4727 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
4728 }
4729 }
4730
4731 #endif /* CONFIG_IEEE80211R_AP */
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