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FT-SAE: Add RSNXE into FT MIC
[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)
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, 0);
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, 0);
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 out sequence number request to " MACSTR,
955 MAC2STR(src_addr));
956 item = os_zalloc(sizeof(*item));
957 if (!item)
958 goto err;
959
960 os_memcpy(item->src_addr, src_addr, ETH_ALEN);
961 item->cb = cb;
962
963 if (random_get_bytes(item->nonce, FT_RRB_NONCE_LEN) < 0) {
964 wpa_printf(MSG_DEBUG, "FT: Seq num nonce: out of random bytes");
965 goto err;
966 }
967
968 if (os_get_reltime(&item->nonce_ts) < 0)
969 goto err;
970
971 if (enc && enc_len > 0) {
972 item->enc = os_memdup(enc, enc_len);
973 item->enc_len = enc_len;
974 if (!item->enc)
975 goto err;
976 }
977
978 if (auth && auth_len > 0) {
979 item->auth = os_memdup(auth, auth_len);
980 item->auth_len = auth_len;
981 if (!item->auth)
982 goto err;
983 }
984
985 eloop_register_timeout(ftRRBseqTimeout, 0, wpa_ft_rrb_seq_timeout,
986 wpa_auth, item);
987
988 seq_req_auth[0].data = item->nonce;
989
990 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_req_auth, NULL,
991 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
992 &packet, &packet_len) < 0) {
993 item = NULL; /* some other seq resp might still accept this */
994 goto err;
995 }
996
997 dl_list_add(&rkh_seq->rx.queue, &item->list);
998
999 wpa_ft_rrb_oui_send(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
1000 packet, packet_len);
1001
1002 os_free(packet);
1003
1004 return 0;
1005 err:
1006 wpa_printf(MSG_DEBUG, "FT: Failed to send sequence number request");
1007 if (item) {
1008 os_free(item->auth);
1009 bin_clear_free(item->enc, item->enc_len);
1010 os_free(item);
1011 }
1012
1013 return -1;
1014 }
1015
1016
1017 #define FT_RRB_SEQ_OK 0
1018 #define FT_RRB_SEQ_DROP 1
1019 #define FT_RRB_SEQ_DEFER 2
1020
1021 static int
1022 wpa_ft_rrb_seq_chk(struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1023 const u8 *enc, size_t enc_len,
1024 const u8 *auth, size_t auth_len,
1025 const char *msgtype, int no_defer)
1026 {
1027 const u8 *f_seq;
1028 size_t f_seq_len;
1029 const struct ft_rrb_seq *msg_both;
1030 u32 msg_seq, msg_off, rkh_off;
1031 struct os_reltime now;
1032 unsigned int i;
1033
1034 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1035 wpa_hexdump(MSG_DEBUG, "FT: sequence number", f_seq, f_seq_len);
1036 msg_both = (const struct ft_rrb_seq *) f_seq;
1037
1038 if (rkh_seq->rx.num_last == 0) {
1039 /* first packet from remote */
1040 goto defer;
1041 }
1042
1043 if (le_to_host32(msg_both->dom) != rkh_seq->rx.dom) {
1044 /* remote might have rebooted */
1045 goto defer;
1046 }
1047
1048 if (os_get_reltime(&now) == 0) {
1049 u32 msg_ts_now_remote, msg_ts_off;
1050 struct os_reltime now_remote;
1051
1052 os_reltime_sub(&now, &rkh_seq->rx.time_offset, &now_remote);
1053 msg_ts_now_remote = now_remote.sec;
1054 msg_ts_off = le_to_host32(msg_both->ts) -
1055 (msg_ts_now_remote - ftRRBseqTimeout);
1056 if (msg_ts_off > 2 * ftRRBseqTimeout)
1057 goto defer;
1058 }
1059
1060 msg_seq = le_to_host32(msg_both->seq);
1061 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1062 msg_off = msg_seq - rkh_off;
1063 if (msg_off > 0xC0000000)
1064 goto out; /* too old message, drop it */
1065
1066 if (msg_off <= 0x40000000) {
1067 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1068 if (rkh_seq->rx.last[i] == msg_seq)
1069 goto out; /* duplicate message, drop it */
1070 }
1071
1072 return FT_RRB_SEQ_OK;
1073 }
1074
1075 defer:
1076 if (no_defer)
1077 goto out;
1078
1079 wpa_printf(MSG_DEBUG, "FT: Possibly invalid sequence number in %s from "
1080 MACSTR, msgtype, MAC2STR(src_addr));
1081
1082 return FT_RRB_SEQ_DEFER;
1083 out:
1084 wpa_printf(MSG_DEBUG, "FT: Invalid sequence number in %s from " MACSTR,
1085 msgtype, MAC2STR(src_addr));
1086
1087 return FT_RRB_SEQ_DROP;
1088 }
1089
1090
1091 static void
1092 wpa_ft_rrb_seq_accept(struct wpa_authenticator *wpa_auth,
1093 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1094 const u8 *auth, size_t auth_len,
1095 const char *msgtype)
1096 {
1097 const u8 *f_seq;
1098 size_t f_seq_len;
1099 const struct ft_rrb_seq *msg_both;
1100 u32 msg_seq, msg_off, min_off, rkh_off;
1101 int minidx = 0;
1102 unsigned int i;
1103
1104 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1105 msg_both = (const struct ft_rrb_seq *) f_seq;
1106
1107 msg_seq = le_to_host32(msg_both->seq);
1108
1109 if (rkh_seq->rx.num_last < FT_REMOTE_SEQ_BACKLOG) {
1110 rkh_seq->rx.last[rkh_seq->rx.num_last] = msg_seq;
1111 rkh_seq->rx.num_last++;
1112 return;
1113 }
1114
1115 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1116 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1117 msg_off = rkh_seq->rx.last[i] - rkh_off;
1118 min_off = rkh_seq->rx.last[minidx] - rkh_off;
1119 if (msg_off < min_off && i != rkh_seq->rx.offsetidx)
1120 minidx = i;
1121 }
1122 rkh_seq->rx.last[rkh_seq->rx.offsetidx] = msg_seq;
1123 rkh_seq->rx.offsetidx = minidx;
1124
1125 return;
1126 out:
1127 /* RRB_GET_AUTH should never fail here as
1128 * wpa_ft_rrb_seq_chk() verified FT_RRB_SEQ presence. */
1129 wpa_printf(MSG_ERROR, "FT: %s() failed", __func__);
1130 }
1131
1132
1133 static int wpa_ft_new_seq(struct ft_remote_seq *rkh_seq,
1134 struct ft_rrb_seq *f_seq)
1135 {
1136 struct os_reltime now;
1137
1138 if (os_get_reltime(&now) < 0)
1139 return -1;
1140
1141 if (!rkh_seq->tx.dom) {
1142 if (random_get_bytes((u8 *) &rkh_seq->tx.seq,
1143 sizeof(rkh_seq->tx.seq))) {
1144 wpa_printf(MSG_ERROR,
1145 "FT: Failed to get random data for sequence number initialization");
1146 rkh_seq->tx.seq = now.usec;
1147 }
1148 if (random_get_bytes((u8 *) &rkh_seq->tx.dom,
1149 sizeof(rkh_seq->tx.dom))) {
1150 wpa_printf(MSG_ERROR,
1151 "FT: Failed to get random data for sequence number initialization");
1152 rkh_seq->tx.dom = now.usec;
1153 }
1154 rkh_seq->tx.dom |= 1;
1155 }
1156
1157 f_seq->dom = host_to_le32(rkh_seq->tx.dom);
1158 f_seq->seq = host_to_le32(rkh_seq->tx.seq);
1159 f_seq->ts = host_to_le32(now.sec);
1160
1161 rkh_seq->tx.seq++;
1162
1163 return 0;
1164 }
1165
1166
1167 struct wpa_ft_pmk_r0_sa {
1168 struct dl_list list;
1169 u8 pmk_r0[PMK_LEN_MAX];
1170 size_t pmk_r0_len;
1171 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
1172 u8 spa[ETH_ALEN];
1173 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1174 struct vlan_description *vlan;
1175 os_time_t expiration; /* 0 for no expiration */
1176 u8 *identity;
1177 size_t identity_len;
1178 u8 *radius_cui;
1179 size_t radius_cui_len;
1180 os_time_t session_timeout; /* 0 for no expiration */
1181 /* TODO: radius_class, EAP type */
1182 int pmk_r1_pushed;
1183 };
1184
1185 struct wpa_ft_pmk_r1_sa {
1186 struct dl_list list;
1187 u8 pmk_r1[PMK_LEN_MAX];
1188 size_t pmk_r1_len;
1189 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
1190 u8 spa[ETH_ALEN];
1191 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1192 struct vlan_description *vlan;
1193 u8 *identity;
1194 size_t identity_len;
1195 u8 *radius_cui;
1196 size_t radius_cui_len;
1197 os_time_t session_timeout; /* 0 for no expiration */
1198 /* TODO: radius_class, EAP type */
1199 };
1200
1201 struct wpa_ft_pmk_cache {
1202 struct dl_list pmk_r0; /* struct wpa_ft_pmk_r0_sa */
1203 struct dl_list pmk_r1; /* struct wpa_ft_pmk_r1_sa */
1204 };
1205
1206
1207 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx);
1208 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx);
1209
1210
1211 static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0)
1212 {
1213 if (!r0)
1214 return;
1215
1216 dl_list_del(&r0->list);
1217 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1218
1219 os_memset(r0->pmk_r0, 0, PMK_LEN_MAX);
1220 os_free(r0->vlan);
1221 os_free(r0->identity);
1222 os_free(r0->radius_cui);
1223 os_free(r0);
1224 }
1225
1226
1227 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx)
1228 {
1229 struct wpa_ft_pmk_r0_sa *r0 = eloop_ctx;
1230 struct os_reltime now;
1231 int expires_in;
1232 int session_timeout;
1233
1234 os_get_reltime(&now);
1235
1236 if (!r0)
1237 return;
1238
1239 expires_in = r0->expiration - now.sec;
1240 session_timeout = r0->session_timeout - now.sec;
1241 /* conditions to remove from cache:
1242 * a) r0->expiration is set and hit
1243 * -or-
1244 * b) r0->session_timeout is set and hit
1245 */
1246 if ((!r0->expiration || expires_in > 0) &&
1247 (!r0->session_timeout || session_timeout > 0)) {
1248 wpa_printf(MSG_ERROR,
1249 "FT: %s() called for non-expired entry %p",
1250 __func__, r0);
1251 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1252 if (r0->expiration && expires_in > 0)
1253 eloop_register_timeout(expires_in + 1, 0,
1254 wpa_ft_expire_pmk_r0, r0, NULL);
1255 if (r0->session_timeout && session_timeout > 0)
1256 eloop_register_timeout(session_timeout + 1, 0,
1257 wpa_ft_expire_pmk_r0, r0, NULL);
1258 return;
1259 }
1260
1261 wpa_ft_free_pmk_r0(r0);
1262 }
1263
1264
1265 static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1)
1266 {
1267 if (!r1)
1268 return;
1269
1270 dl_list_del(&r1->list);
1271 eloop_cancel_timeout(wpa_ft_expire_pmk_r1, r1, NULL);
1272
1273 os_memset(r1->pmk_r1, 0, PMK_LEN_MAX);
1274 os_free(r1->vlan);
1275 os_free(r1->identity);
1276 os_free(r1->radius_cui);
1277 os_free(r1);
1278 }
1279
1280
1281 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx)
1282 {
1283 struct wpa_ft_pmk_r1_sa *r1 = eloop_ctx;
1284
1285 wpa_ft_free_pmk_r1(r1);
1286 }
1287
1288
1289 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
1290 {
1291 struct wpa_ft_pmk_cache *cache;
1292
1293 cache = os_zalloc(sizeof(*cache));
1294 if (cache) {
1295 dl_list_init(&cache->pmk_r0);
1296 dl_list_init(&cache->pmk_r1);
1297 }
1298
1299 return cache;
1300 }
1301
1302
1303 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
1304 {
1305 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
1306 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
1307
1308 dl_list_for_each_safe(r0, r0prev, &cache->pmk_r0,
1309 struct wpa_ft_pmk_r0_sa, list)
1310 wpa_ft_free_pmk_r0(r0);
1311
1312 dl_list_for_each_safe(r1, r1prev, &cache->pmk_r1,
1313 struct wpa_ft_pmk_r1_sa, list)
1314 wpa_ft_free_pmk_r1(r1);
1315
1316 os_free(cache);
1317 }
1318
1319
1320 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
1321 const u8 *spa, const u8 *pmk_r0,
1322 size_t pmk_r0_len,
1323 const u8 *pmk_r0_name, int pairwise,
1324 const struct vlan_description *vlan,
1325 int expires_in, int session_timeout,
1326 const u8 *identity, size_t identity_len,
1327 const u8 *radius_cui, size_t radius_cui_len)
1328 {
1329 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1330 struct wpa_ft_pmk_r0_sa *r0;
1331 struct os_reltime now;
1332
1333 /* TODO: add limit on number of entries in cache */
1334 os_get_reltime(&now);
1335
1336 r0 = os_zalloc(sizeof(*r0));
1337 if (r0 == NULL)
1338 return -1;
1339
1340 os_memcpy(r0->pmk_r0, pmk_r0, pmk_r0_len);
1341 r0->pmk_r0_len = pmk_r0_len;
1342 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
1343 os_memcpy(r0->spa, spa, ETH_ALEN);
1344 r0->pairwise = pairwise;
1345 if (expires_in > 0)
1346 r0->expiration = now.sec + expires_in;
1347 if (vlan && vlan->notempty) {
1348 r0->vlan = os_zalloc(sizeof(*vlan));
1349 if (!r0->vlan) {
1350 bin_clear_free(r0, sizeof(*r0));
1351 return -1;
1352 }
1353 *r0->vlan = *vlan;
1354 }
1355 if (identity) {
1356 r0->identity = os_malloc(identity_len);
1357 if (r0->identity) {
1358 os_memcpy(r0->identity, identity, identity_len);
1359 r0->identity_len = identity_len;
1360 }
1361 }
1362 if (radius_cui) {
1363 r0->radius_cui = os_malloc(radius_cui_len);
1364 if (r0->radius_cui) {
1365 os_memcpy(r0->radius_cui, radius_cui, radius_cui_len);
1366 r0->radius_cui_len = radius_cui_len;
1367 }
1368 }
1369 if (session_timeout > 0)
1370 r0->session_timeout = now.sec + session_timeout;
1371
1372 dl_list_add(&cache->pmk_r0, &r0->list);
1373 if (expires_in > 0)
1374 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r0,
1375 r0, NULL);
1376 if (session_timeout > 0)
1377 eloop_register_timeout(session_timeout + 1, 0,
1378 wpa_ft_expire_pmk_r0, r0, NULL);
1379
1380 return 0;
1381 }
1382
1383
1384 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
1385 const u8 *spa, const u8 *pmk_r0_name,
1386 const struct wpa_ft_pmk_r0_sa **r0_out)
1387 {
1388 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1389 struct wpa_ft_pmk_r0_sa *r0;
1390 struct os_reltime now;
1391
1392 os_get_reltime(&now);
1393 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
1394 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
1395 os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
1396 WPA_PMK_NAME_LEN) == 0) {
1397 *r0_out = r0;
1398 return 0;
1399 }
1400 }
1401
1402 *r0_out = NULL;
1403 return -1;
1404 }
1405
1406
1407 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
1408 const u8 *spa, const u8 *pmk_r1,
1409 size_t pmk_r1_len,
1410 const u8 *pmk_r1_name, int pairwise,
1411 const struct vlan_description *vlan,
1412 int expires_in, int session_timeout,
1413 const u8 *identity, size_t identity_len,
1414 const u8 *radius_cui, size_t radius_cui_len)
1415 {
1416 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1417 int max_expires_in = wpa_auth->conf.r1_max_key_lifetime;
1418 struct wpa_ft_pmk_r1_sa *r1;
1419 struct os_reltime now;
1420
1421 /* TODO: limit on number of entries in cache */
1422 os_get_reltime(&now);
1423
1424 if (max_expires_in && (max_expires_in < expires_in || expires_in == 0))
1425 expires_in = max_expires_in;
1426
1427 r1 = os_zalloc(sizeof(*r1));
1428 if (r1 == NULL)
1429 return -1;
1430
1431 os_memcpy(r1->pmk_r1, pmk_r1, pmk_r1_len);
1432 r1->pmk_r1_len = pmk_r1_len;
1433 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
1434 os_memcpy(r1->spa, spa, ETH_ALEN);
1435 r1->pairwise = pairwise;
1436 if (vlan && vlan->notempty) {
1437 r1->vlan = os_zalloc(sizeof(*vlan));
1438 if (!r1->vlan) {
1439 bin_clear_free(r1, sizeof(*r1));
1440 return -1;
1441 }
1442 *r1->vlan = *vlan;
1443 }
1444 if (identity) {
1445 r1->identity = os_malloc(identity_len);
1446 if (r1->identity) {
1447 os_memcpy(r1->identity, identity, identity_len);
1448 r1->identity_len = identity_len;
1449 }
1450 }
1451 if (radius_cui) {
1452 r1->radius_cui = os_malloc(radius_cui_len);
1453 if (r1->radius_cui) {
1454 os_memcpy(r1->radius_cui, radius_cui, radius_cui_len);
1455 r1->radius_cui_len = radius_cui_len;
1456 }
1457 }
1458 if (session_timeout > 0)
1459 r1->session_timeout = now.sec + session_timeout;
1460
1461 dl_list_add(&cache->pmk_r1, &r1->list);
1462
1463 if (expires_in > 0)
1464 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r1,
1465 r1, NULL);
1466 if (session_timeout > 0)
1467 eloop_register_timeout(session_timeout + 1, 0,
1468 wpa_ft_expire_pmk_r1, r1, NULL);
1469
1470 return 0;
1471 }
1472
1473
1474 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
1475 const u8 *spa, const u8 *pmk_r1_name,
1476 u8 *pmk_r1, size_t *pmk_r1_len, int *pairwise,
1477 struct vlan_description *vlan,
1478 const u8 **identity, size_t *identity_len,
1479 const u8 **radius_cui, size_t *radius_cui_len,
1480 int *session_timeout)
1481 {
1482 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1483 struct wpa_ft_pmk_r1_sa *r1;
1484 struct os_reltime now;
1485
1486 os_get_reltime(&now);
1487
1488 dl_list_for_each(r1, &cache->pmk_r1, struct wpa_ft_pmk_r1_sa, list) {
1489 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
1490 os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
1491 WPA_PMK_NAME_LEN) == 0) {
1492 os_memcpy(pmk_r1, r1->pmk_r1, r1->pmk_r1_len);
1493 *pmk_r1_len = r1->pmk_r1_len;
1494 if (pairwise)
1495 *pairwise = r1->pairwise;
1496 if (vlan && r1->vlan)
1497 *vlan = *r1->vlan;
1498 if (vlan && !r1->vlan)
1499 os_memset(vlan, 0, sizeof(*vlan));
1500 if (identity && identity_len) {
1501 *identity = r1->identity;
1502 *identity_len = r1->identity_len;
1503 }
1504 if (radius_cui && radius_cui_len) {
1505 *radius_cui = r1->radius_cui;
1506 *radius_cui_len = r1->radius_cui_len;
1507 }
1508 if (session_timeout && r1->session_timeout > now.sec)
1509 *session_timeout = r1->session_timeout -
1510 now.sec;
1511 else if (session_timeout && r1->session_timeout)
1512 *session_timeout = 1;
1513 else if (session_timeout)
1514 *session_timeout = 0;
1515 return 0;
1516 }
1517 }
1518
1519 return -1;
1520 }
1521
1522
1523 static int wpa_ft_rrb_init_r0kh_seq(struct ft_remote_r0kh *r0kh)
1524 {
1525 if (r0kh->seq)
1526 return 0;
1527
1528 r0kh->seq = os_zalloc(sizeof(*r0kh->seq));
1529 if (!r0kh->seq) {
1530 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r0kh->seq");
1531 return -1;
1532 }
1533
1534 dl_list_init(&r0kh->seq->rx.queue);
1535
1536 return 0;
1537 }
1538
1539
1540 static void wpa_ft_rrb_lookup_r0kh(struct wpa_authenticator *wpa_auth,
1541 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
1542 struct ft_remote_r0kh **r0kh_out,
1543 struct ft_remote_r0kh **r0kh_wildcard)
1544 {
1545 struct ft_remote_r0kh *r0kh;
1546
1547 *r0kh_wildcard = NULL;
1548 *r0kh_out = NULL;
1549
1550 if (wpa_auth->conf.r0kh_list)
1551 r0kh = *wpa_auth->conf.r0kh_list;
1552 else
1553 r0kh = NULL;
1554 for (; r0kh; r0kh = r0kh->next) {
1555 if (r0kh->id_len == 1 && r0kh->id[0] == '*')
1556 *r0kh_wildcard = r0kh;
1557 if (f_r0kh_id && r0kh->id_len == f_r0kh_id_len &&
1558 os_memcmp_const(f_r0kh_id, r0kh->id, f_r0kh_id_len) == 0)
1559 *r0kh_out = r0kh;
1560 }
1561
1562 if (!*r0kh_out && !*r0kh_wildcard)
1563 wpa_printf(MSG_DEBUG, "FT: No matching R0KH found");
1564
1565 if (*r0kh_out && wpa_ft_rrb_init_r0kh_seq(*r0kh_out) < 0)
1566 *r0kh_out = NULL;
1567 }
1568
1569
1570 static int wpa_ft_rrb_init_r1kh_seq(struct ft_remote_r1kh *r1kh)
1571 {
1572 if (r1kh->seq)
1573 return 0;
1574
1575 r1kh->seq = os_zalloc(sizeof(*r1kh->seq));
1576 if (!r1kh->seq) {
1577 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r1kh->seq");
1578 return -1;
1579 }
1580
1581 dl_list_init(&r1kh->seq->rx.queue);
1582
1583 return 0;
1584 }
1585
1586
1587 static void wpa_ft_rrb_lookup_r1kh(struct wpa_authenticator *wpa_auth,
1588 const u8 *f_r1kh_id,
1589 struct ft_remote_r1kh **r1kh_out,
1590 struct ft_remote_r1kh **r1kh_wildcard)
1591 {
1592 struct ft_remote_r1kh *r1kh;
1593
1594 *r1kh_wildcard = NULL;
1595 *r1kh_out = NULL;
1596
1597 if (wpa_auth->conf.r1kh_list)
1598 r1kh = *wpa_auth->conf.r1kh_list;
1599 else
1600 r1kh = NULL;
1601 for (; r1kh; r1kh = r1kh->next) {
1602 if (is_zero_ether_addr(r1kh->addr) &&
1603 is_zero_ether_addr(r1kh->id))
1604 *r1kh_wildcard = r1kh;
1605 if (f_r1kh_id &&
1606 os_memcmp_const(r1kh->id, f_r1kh_id, FT_R1KH_ID_LEN) == 0)
1607 *r1kh_out = r1kh;
1608 }
1609
1610 if (!*r1kh_out && !*r1kh_wildcard)
1611 wpa_printf(MSG_DEBUG, "FT: No matching R1KH found");
1612
1613 if (*r1kh_out && wpa_ft_rrb_init_r1kh_seq(*r1kh_out) < 0)
1614 *r1kh_out = NULL;
1615 }
1616
1617
1618 static int wpa_ft_rrb_check_r0kh(struct wpa_authenticator *wpa_auth,
1619 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1620 {
1621 if (f_r0kh_id_len != wpa_auth->conf.r0_key_holder_len ||
1622 os_memcmp_const(f_r0kh_id, wpa_auth->conf.r0_key_holder,
1623 f_r0kh_id_len) != 0)
1624 return -1;
1625
1626 return 0;
1627 }
1628
1629
1630 static int wpa_ft_rrb_check_r1kh(struct wpa_authenticator *wpa_auth,
1631 const u8 *f_r1kh_id)
1632 {
1633 if (os_memcmp_const(f_r1kh_id, wpa_auth->conf.r1_key_holder,
1634 FT_R1KH_ID_LEN) != 0)
1635 return -1;
1636
1637 return 0;
1638 }
1639
1640
1641 static void wpa_ft_rrb_del_r0kh(void *eloop_ctx, void *timeout_ctx)
1642 {
1643 struct wpa_authenticator *wpa_auth = eloop_ctx;
1644 struct ft_remote_r0kh *r0kh, *prev = NULL;
1645
1646 if (!wpa_auth->conf.r0kh_list)
1647 return;
1648
1649 for (r0kh = *wpa_auth->conf.r0kh_list; r0kh; r0kh = r0kh->next) {
1650 if (r0kh == timeout_ctx)
1651 break;
1652 prev = r0kh;
1653 }
1654 if (!r0kh)
1655 return;
1656 if (prev)
1657 prev->next = r0kh->next;
1658 else
1659 *wpa_auth->conf.r0kh_list = r0kh->next;
1660 if (r0kh->seq)
1661 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1662 os_free(r0kh->seq);
1663 os_free(r0kh);
1664 }
1665
1666
1667 static void wpa_ft_rrb_r0kh_replenish(struct wpa_authenticator *wpa_auth,
1668 struct ft_remote_r0kh *r0kh, int timeout)
1669 {
1670 if (timeout > 0)
1671 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1672 wpa_auth, r0kh);
1673 }
1674
1675
1676 static void wpa_ft_rrb_r0kh_timeout(struct wpa_authenticator *wpa_auth,
1677 struct ft_remote_r0kh *r0kh, int timeout)
1678 {
1679 eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth, r0kh);
1680
1681 if (timeout > 0)
1682 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1683 wpa_auth, r0kh);
1684 }
1685
1686
1687 static struct ft_remote_r0kh *
1688 wpa_ft_rrb_add_r0kh(struct wpa_authenticator *wpa_auth,
1689 struct ft_remote_r0kh *r0kh_wildcard,
1690 const u8 *src_addr, const u8 *r0kh_id, size_t id_len,
1691 int timeout)
1692 {
1693 struct ft_remote_r0kh *r0kh;
1694
1695 if (!wpa_auth->conf.r0kh_list)
1696 return NULL;
1697
1698 r0kh = os_zalloc(sizeof(*r0kh));
1699 if (!r0kh)
1700 return NULL;
1701
1702 if (src_addr)
1703 os_memcpy(r0kh->addr, src_addr, sizeof(r0kh->addr));
1704
1705 if (id_len > FT_R0KH_ID_MAX_LEN)
1706 id_len = FT_R0KH_ID_MAX_LEN;
1707 os_memcpy(r0kh->id, r0kh_id, id_len);
1708 r0kh->id_len = id_len;
1709
1710 os_memcpy(r0kh->key, r0kh_wildcard->key, sizeof(r0kh->key));
1711
1712 r0kh->next = *wpa_auth->conf.r0kh_list;
1713 *wpa_auth->conf.r0kh_list = r0kh;
1714
1715 if (timeout > 0)
1716 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1717 wpa_auth, r0kh);
1718
1719 if (wpa_ft_rrb_init_r0kh_seq(r0kh) < 0)
1720 return NULL;
1721
1722 return r0kh;
1723 }
1724
1725
1726 static void wpa_ft_rrb_del_r1kh(void *eloop_ctx, void *timeout_ctx)
1727 {
1728 struct wpa_authenticator *wpa_auth = eloop_ctx;
1729 struct ft_remote_r1kh *r1kh, *prev = NULL;
1730
1731 if (!wpa_auth->conf.r1kh_list)
1732 return;
1733
1734 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
1735 if (r1kh == timeout_ctx)
1736 break;
1737 prev = r1kh;
1738 }
1739 if (!r1kh)
1740 return;
1741 if (prev)
1742 prev->next = r1kh->next;
1743 else
1744 *wpa_auth->conf.r1kh_list = r1kh->next;
1745 if (r1kh->seq)
1746 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1747 os_free(r1kh->seq);
1748 os_free(r1kh);
1749 }
1750
1751
1752 static void wpa_ft_rrb_r1kh_replenish(struct wpa_authenticator *wpa_auth,
1753 struct ft_remote_r1kh *r1kh, int timeout)
1754 {
1755 if (timeout > 0)
1756 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1757 wpa_auth, r1kh);
1758 }
1759
1760
1761 static struct ft_remote_r1kh *
1762 wpa_ft_rrb_add_r1kh(struct wpa_authenticator *wpa_auth,
1763 struct ft_remote_r1kh *r1kh_wildcard,
1764 const u8 *src_addr, const u8 *r1kh_id, int timeout)
1765 {
1766 struct ft_remote_r1kh *r1kh;
1767
1768 if (!wpa_auth->conf.r1kh_list)
1769 return NULL;
1770
1771 r1kh = os_zalloc(sizeof(*r1kh));
1772 if (!r1kh)
1773 return NULL;
1774
1775 os_memcpy(r1kh->addr, src_addr, sizeof(r1kh->addr));
1776 os_memcpy(r1kh->id, r1kh_id, sizeof(r1kh->id));
1777 os_memcpy(r1kh->key, r1kh_wildcard->key, sizeof(r1kh->key));
1778 r1kh->next = *wpa_auth->conf.r1kh_list;
1779 *wpa_auth->conf.r1kh_list = r1kh;
1780
1781 if (timeout > 0)
1782 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1783 wpa_auth, r1kh);
1784
1785 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
1786 return NULL;
1787
1788 return r1kh;
1789 }
1790
1791
1792 void wpa_ft_sta_deinit(struct wpa_state_machine *sm)
1793 {
1794 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1795 }
1796
1797
1798 static void wpa_ft_deinit_seq(struct wpa_authenticator *wpa_auth)
1799 {
1800 struct ft_remote_r0kh *r0kh;
1801 struct ft_remote_r1kh *r1kh;
1802
1803 eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, wpa_auth, ELOOP_ALL_CTX);
1804
1805 if (wpa_auth->conf.r0kh_list)
1806 r0kh = *wpa_auth->conf.r0kh_list;
1807 else
1808 r0kh = NULL;
1809 for (; r0kh; r0kh = r0kh->next) {
1810 if (!r0kh->seq)
1811 continue;
1812 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1813 os_free(r0kh->seq);
1814 r0kh->seq = NULL;
1815 }
1816
1817 if (wpa_auth->conf.r1kh_list)
1818 r1kh = *wpa_auth->conf.r1kh_list;
1819 else
1820 r1kh = NULL;
1821 for (; r1kh; r1kh = r1kh->next) {
1822 if (!r1kh->seq)
1823 continue;
1824 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1825 os_free(r1kh->seq);
1826 r1kh->seq = NULL;
1827 }
1828 }
1829
1830
1831 static void wpa_ft_deinit_rkh_tmp(struct wpa_authenticator *wpa_auth)
1832 {
1833 struct ft_remote_r0kh *r0kh, *r0kh_next, *r0kh_prev = NULL;
1834 struct ft_remote_r1kh *r1kh, *r1kh_next, *r1kh_prev = NULL;
1835
1836 if (wpa_auth->conf.r0kh_list)
1837 r0kh = *wpa_auth->conf.r0kh_list;
1838 else
1839 r0kh = NULL;
1840 while (r0kh) {
1841 r0kh_next = r0kh->next;
1842 if (eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth,
1843 r0kh) > 0) {
1844 if (r0kh_prev)
1845 r0kh_prev->next = r0kh_next;
1846 else
1847 *wpa_auth->conf.r0kh_list = r0kh_next;
1848 os_free(r0kh);
1849 } else {
1850 r0kh_prev = r0kh;
1851 }
1852 r0kh = r0kh_next;
1853 }
1854
1855 if (wpa_auth->conf.r1kh_list)
1856 r1kh = *wpa_auth->conf.r1kh_list;
1857 else
1858 r1kh = NULL;
1859 while (r1kh) {
1860 r1kh_next = r1kh->next;
1861 if (eloop_cancel_timeout(wpa_ft_rrb_del_r1kh, wpa_auth,
1862 r1kh) > 0) {
1863 if (r1kh_prev)
1864 r1kh_prev->next = r1kh_next;
1865 else
1866 *wpa_auth->conf.r1kh_list = r1kh_next;
1867 os_free(r1kh);
1868 } else {
1869 r1kh_prev = r1kh;
1870 }
1871 r1kh = r1kh_next;
1872 }
1873 }
1874
1875
1876 void wpa_ft_deinit(struct wpa_authenticator *wpa_auth)
1877 {
1878 wpa_ft_deinit_seq(wpa_auth);
1879 wpa_ft_deinit_rkh_tmp(wpa_auth);
1880 }
1881
1882
1883 static void wpa_ft_block_r0kh(struct wpa_authenticator *wpa_auth,
1884 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1885 {
1886 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1887
1888 if (!wpa_auth->conf.rkh_neg_timeout)
1889 return;
1890
1891 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
1892 &r0kh, &r0kh_wildcard);
1893
1894 if (!r0kh_wildcard) {
1895 /* r0kh removed after neg_timeout and might need re-adding */
1896 return;
1897 }
1898
1899 wpa_hexdump(MSG_DEBUG, "FT: Blacklist R0KH-ID",
1900 f_r0kh_id, f_r0kh_id_len);
1901
1902 if (r0kh) {
1903 wpa_ft_rrb_r0kh_timeout(wpa_auth, r0kh,
1904 wpa_auth->conf.rkh_neg_timeout);
1905 os_memset(r0kh->addr, 0, ETH_ALEN);
1906 } else
1907 wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, NULL, f_r0kh_id,
1908 f_r0kh_id_len,
1909 wpa_auth->conf.rkh_neg_timeout);
1910 }
1911
1912
1913 static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx)
1914 {
1915 struct wpa_state_machine *sm = eloop_ctx;
1916
1917 wpa_printf(MSG_DEBUG, "FT: Timeout pending pull request for " MACSTR,
1918 MAC2STR(sm->addr));
1919 if (sm->ft_pending_pull_left_retries <= 0)
1920 wpa_ft_block_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len);
1921
1922 /* cancel multiple timeouts */
1923 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1924 ft_finish_pull(sm);
1925 }
1926
1927
1928 static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
1929 const u8 *ies, size_t ies_len,
1930 const u8 *pmk_r0_name)
1931 {
1932 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1933 u8 *packet = NULL;
1934 const u8 *key, *f_r1kh_id = sm->wpa_auth->conf.r1_key_holder;
1935 size_t packet_len, key_len;
1936 struct ft_rrb_seq f_seq;
1937 int tsecs, tusecs, first;
1938 struct wpabuf *ft_pending_req_ies;
1939 int r0kh_timeout;
1940 struct tlv_list req_enc[] = {
1941 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
1942 .data = pmk_r0_name },
1943 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
1944 .data = sm->addr },
1945 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1946 };
1947 struct tlv_list req_auth[] = {
1948 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
1949 .data = sm->ft_pending_pull_nonce },
1950 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
1951 .data = (u8 *) &f_seq },
1952 { .type = FT_RRB_R0KH_ID, .len = sm->r0kh_id_len,
1953 .data = sm->r0kh_id },
1954 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
1955 .data = f_r1kh_id },
1956 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1957 };
1958
1959 if (sm->ft_pending_pull_left_retries <= 0)
1960 return -1;
1961 first = sm->ft_pending_pull_left_retries ==
1962 sm->wpa_auth->conf.rkh_pull_retries;
1963 sm->ft_pending_pull_left_retries--;
1964
1965 wpa_ft_rrb_lookup_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len,
1966 &r0kh, &r0kh_wildcard);
1967
1968 /* Keep r0kh sufficiently long in the list for seq num check */
1969 r0kh_timeout = sm->wpa_auth->conf.rkh_pull_timeout / 1000 +
1970 1 + ftRRBseqTimeout;
1971 if (r0kh) {
1972 wpa_ft_rrb_r0kh_replenish(sm->wpa_auth, r0kh, r0kh_timeout);
1973 } else if (r0kh_wildcard) {
1974 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
1975 /* r0kh->addr: updated by SEQ_RESP and wpa_ft_expire_pull */
1976 r0kh = wpa_ft_rrb_add_r0kh(sm->wpa_auth, r0kh_wildcard,
1977 r0kh_wildcard->addr,
1978 sm->r0kh_id, sm->r0kh_id_len,
1979 r0kh_timeout);
1980 }
1981 if (r0kh == NULL) {
1982 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
1983 sm->r0kh_id, sm->r0kh_id_len);
1984 return -1;
1985 }
1986 if (is_zero_ether_addr(r0kh->addr)) {
1987 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID is blacklisted",
1988 sm->r0kh_id, sm->r0kh_id_len);
1989 return -1;
1990 }
1991 if (os_memcmp(r0kh->addr, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1992 wpa_printf(MSG_DEBUG,
1993 "FT: R0KH-ID points to self - no matching key available");
1994 return -1;
1995 }
1996
1997 key = r0kh->key;
1998 key_len = sizeof(r0kh->key);
1999
2000 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
2001 "address " MACSTR, MAC2STR(r0kh->addr));
2002
2003 if (r0kh->seq->rx.num_last == 0) {
2004 /* A sequence request will be sent out anyway when pull
2005 * response is received. Send it out now to avoid one RTT. */
2006 wpa_ft_rrb_seq_req(sm->wpa_auth, r0kh->seq, r0kh->addr,
2007 r0kh->id, r0kh->id_len, f_r1kh_id, key,
2008 key_len, NULL, 0, NULL, 0, NULL);
2009 }
2010
2011 if (first &&
2012 random_get_bytes(sm->ft_pending_pull_nonce, FT_RRB_NONCE_LEN) < 0) {
2013 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
2014 "nonce");
2015 return -1;
2016 }
2017
2018 if (wpa_ft_new_seq(r0kh->seq, &f_seq) < 0) {
2019 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
2020 return -1;
2021 }
2022
2023 if (wpa_ft_rrb_build(key, key_len, req_enc, NULL, req_auth, NULL,
2024 sm->wpa_auth->addr, FT_PACKET_R0KH_R1KH_PULL,
2025 &packet, &packet_len) < 0)
2026 return -1;
2027
2028 ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
2029 wpabuf_free(sm->ft_pending_req_ies);
2030 sm->ft_pending_req_ies = ft_pending_req_ies;
2031 if (!sm->ft_pending_req_ies) {
2032 os_free(packet);
2033 return -1;
2034 }
2035
2036 tsecs = sm->wpa_auth->conf.rkh_pull_timeout / 1000;
2037 tusecs = (sm->wpa_auth->conf.rkh_pull_timeout % 1000) * 1000;
2038 eloop_register_timeout(tsecs, tusecs, wpa_ft_expire_pull, sm, NULL);
2039
2040 wpa_ft_rrb_oui_send(sm->wpa_auth, r0kh->addr, FT_PACKET_R0KH_R1KH_PULL,
2041 packet, packet_len);
2042
2043 os_free(packet);
2044
2045 return 0;
2046 }
2047
2048
2049 int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm,
2050 const u8 *pmk_r0, const u8 *pmk_r0_name)
2051 {
2052 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2053 struct vlan_description vlan;
2054 const u8 *identity, *radius_cui;
2055 size_t identity_len, radius_cui_len;
2056 int session_timeout;
2057 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2058 SHA384_MAC_LEN : PMK_LEN;
2059
2060 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2061 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2062 MAC2STR(sm->addr));
2063 return -1;
2064 }
2065
2066 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2067 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2068 &radius_cui);
2069 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2070
2071 return wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2072 pmk_r0_name, sm->pairwise, &vlan, expires_in,
2073 session_timeout, identity, identity_len,
2074 radius_cui, radius_cui_len);
2075 }
2076
2077
2078 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, struct wpa_ptk *ptk)
2079 {
2080 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2081 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2082 SHA384_MAC_LEN : PMK_LEN;
2083 size_t pmk_r1_len = pmk_r0_len;
2084 u8 pmk_r1[PMK_LEN_MAX];
2085 u8 ptk_name[WPA_PMK_NAME_LEN];
2086 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
2087 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
2088 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
2089 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
2090 const u8 *ssid = sm->wpa_auth->conf.ssid;
2091 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
2092 int psk_local = sm->wpa_auth->conf.ft_psk_generate_local;
2093 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2094 struct vlan_description vlan;
2095 const u8 *identity, *radius_cui;
2096 size_t identity_len, radius_cui_len;
2097 int session_timeout;
2098 const u8 *mpmk;
2099 size_t mpmk_len;
2100
2101 if (sm->xxkey_len > 0) {
2102 mpmk = sm->xxkey;
2103 mpmk_len = sm->xxkey_len;
2104 } else if (sm->pmksa) {
2105 mpmk = sm->pmksa->pmk;
2106 mpmk_len = sm->pmksa->pmk_len;
2107 } else {
2108 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
2109 "derivation");
2110 return -1;
2111 }
2112
2113 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2114 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2115 MAC2STR(sm->addr));
2116 return -1;
2117 }
2118
2119 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2120 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2121 &radius_cui);
2122 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2123
2124 if (wpa_derive_pmk_r0(mpmk, mpmk_len, ssid, ssid_len, mdid,
2125 r0kh, r0kh_len, sm->addr,
2126 pmk_r0, pmk_r0_name,
2127 wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) < 0)
2128 return -1;
2129 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
2130 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
2131 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2132 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2133 pmk_r0_name,
2134 sm->pairwise, &vlan, expires_in,
2135 session_timeout, identity, identity_len,
2136 radius_cui, radius_cui_len);
2137
2138 if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_len, pmk_r0_name, r1kh, sm->addr,
2139 pmk_r1, sm->pmk_r1_name) < 0)
2140 return -1;
2141 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
2142 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
2143 WPA_PMK_NAME_LEN);
2144 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2145 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_len,
2146 sm->pmk_r1_name, sm->pairwise, &vlan,
2147 expires_in, session_timeout, identity,
2148 identity_len, radius_cui, radius_cui_len);
2149
2150 return wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
2151 sm->addr, sm->wpa_auth->addr, sm->pmk_r1_name,
2152 ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
2153 }
2154
2155
2156 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
2157 const u8 *addr, int idx, u8 *seq)
2158 {
2159 if (wpa_auth->cb->get_seqnum == NULL)
2160 return -1;
2161 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
2162 }
2163
2164
2165 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
2166 {
2167 u8 *subelem;
2168 struct wpa_group *gsm = sm->group;
2169 size_t subelem_len, pad_len;
2170 const u8 *key;
2171 size_t key_len;
2172 u8 keybuf[32];
2173 const u8 *kek;
2174 size_t kek_len;
2175
2176 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2177 kek = sm->PTK.kek2;
2178 kek_len = sm->PTK.kek2_len;
2179 } else {
2180 kek = sm->PTK.kek;
2181 kek_len = sm->PTK.kek_len;
2182 }
2183
2184 key_len = gsm->GTK_len;
2185 if (key_len > sizeof(keybuf))
2186 return NULL;
2187
2188 /*
2189 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
2190 * than 16 bytes.
2191 */
2192 pad_len = key_len % 8;
2193 if (pad_len)
2194 pad_len = 8 - pad_len;
2195 if (key_len + pad_len < 16)
2196 pad_len += 8;
2197 if (pad_len && key_len < sizeof(keybuf)) {
2198 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
2199 os_memset(keybuf + key_len, 0, pad_len);
2200 keybuf[key_len] = 0xdd;
2201 key_len += pad_len;
2202 key = keybuf;
2203 } else
2204 key = gsm->GTK[gsm->GN - 1];
2205
2206 /*
2207 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2208 * Key[5..32].
2209 */
2210 subelem_len = 13 + key_len + 8;
2211 subelem = os_zalloc(subelem_len);
2212 if (subelem == NULL)
2213 return NULL;
2214
2215 subelem[0] = FTIE_SUBELEM_GTK;
2216 subelem[1] = 11 + key_len + 8;
2217 /* Key ID in B0-B1 of Key Info */
2218 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
2219 subelem[4] = gsm->GTK_len;
2220 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
2221 if (aes_wrap(kek, kek_len, key_len / 8, key, subelem + 13)) {
2222 wpa_printf(MSG_DEBUG,
2223 "FT: GTK subelem encryption failed: kek_len=%d",
2224 (int) kek_len);
2225 os_free(subelem);
2226 return NULL;
2227 }
2228
2229 forced_memzero(keybuf, sizeof(keybuf));
2230 *len = subelem_len;
2231 return subelem;
2232 }
2233
2234
2235 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
2236 {
2237 u8 *subelem, *pos;
2238 struct wpa_group *gsm = sm->group;
2239 size_t subelem_len;
2240 const u8 *kek;
2241 size_t kek_len;
2242 size_t igtk_len;
2243
2244 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2245 kek = sm->PTK.kek2;
2246 kek_len = sm->PTK.kek2_len;
2247 } else {
2248 kek = sm->PTK.kek;
2249 kek_len = sm->PTK.kek_len;
2250 }
2251
2252 igtk_len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2253
2254 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
2255 * Key[16+8] */
2256 subelem_len = 1 + 1 + 2 + 6 + 1 + igtk_len + 8;
2257 subelem = os_zalloc(subelem_len);
2258 if (subelem == NULL)
2259 return NULL;
2260
2261 pos = subelem;
2262 *pos++ = FTIE_SUBELEM_IGTK;
2263 *pos++ = subelem_len - 2;
2264 WPA_PUT_LE16(pos, gsm->GN_igtk);
2265 pos += 2;
2266 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
2267 pos += 6;
2268 *pos++ = igtk_len;
2269 if (aes_wrap(kek, kek_len, igtk_len / 8,
2270 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
2271 wpa_printf(MSG_DEBUG,
2272 "FT: IGTK subelem encryption failed: kek_len=%d",
2273 (int) kek_len);
2274 os_free(subelem);
2275 return NULL;
2276 }
2277
2278 *len = subelem_len;
2279 return subelem;
2280 }
2281
2282
2283 static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
2284 u8 *pos, u8 *end, u8 id, u8 descr_count,
2285 const u8 *ies, size_t ies_len)
2286 {
2287 struct ieee802_11_elems parse;
2288 struct rsn_rdie *rdie;
2289
2290 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
2291 id, descr_count);
2292 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
2293 ies, ies_len);
2294
2295 if (end - pos < (int) sizeof(*rdie)) {
2296 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
2297 return pos;
2298 }
2299
2300 *pos++ = WLAN_EID_RIC_DATA;
2301 *pos++ = sizeof(*rdie);
2302 rdie = (struct rsn_rdie *) pos;
2303 rdie->id = id;
2304 rdie->descr_count = 0;
2305 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
2306 pos += sizeof(*rdie);
2307
2308 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
2309 ParseFailed) {
2310 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
2311 rdie->status_code =
2312 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2313 return pos;
2314 }
2315
2316 if (parse.wmm_tspec) {
2317 struct wmm_tspec_element *tspec;
2318
2319 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
2320 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
2321 "(%d)", (int) parse.wmm_tspec_len);
2322 rdie->status_code =
2323 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2324 return pos;
2325 }
2326 if (end - pos < (int) sizeof(*tspec)) {
2327 wpa_printf(MSG_ERROR, "FT: Not enough room for "
2328 "response TSPEC");
2329 rdie->status_code =
2330 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2331 return pos;
2332 }
2333 tspec = (struct wmm_tspec_element *) pos;
2334 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
2335 }
2336
2337 #ifdef NEED_AP_MLME
2338 if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
2339 int res;
2340
2341 res = wmm_process_tspec((struct wmm_tspec_element *) pos);
2342 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
2343 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
2344 rdie->status_code =
2345 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
2346 else if (res == WMM_ADDTS_STATUS_REFUSED)
2347 rdie->status_code =
2348 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
2349 else {
2350 /* TSPEC accepted; include updated TSPEC in response */
2351 rdie->descr_count = 1;
2352 pos += sizeof(struct wmm_tspec_element);
2353 }
2354 return pos;
2355 }
2356 #endif /* NEED_AP_MLME */
2357
2358 if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
2359 int res;
2360
2361 res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
2362 sizeof(struct wmm_tspec_element));
2363 if (res >= 0) {
2364 if (res)
2365 rdie->status_code = host_to_le16(res);
2366 else {
2367 /* TSPEC accepted; include updated TSPEC in
2368 * response */
2369 rdie->descr_count = 1;
2370 pos += sizeof(struct wmm_tspec_element);
2371 }
2372 return pos;
2373 }
2374 }
2375
2376 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
2377 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2378 return pos;
2379 }
2380
2381
2382 static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
2383 const u8 *ric, size_t ric_len)
2384 {
2385 const u8 *rpos, *start;
2386 const struct rsn_rdie *rdie;
2387
2388 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
2389
2390 rpos = ric;
2391 while (rpos + sizeof(*rdie) < ric + ric_len) {
2392 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
2393 rpos + 2 + rpos[1] > ric + ric_len)
2394 break;
2395 rdie = (const struct rsn_rdie *) (rpos + 2);
2396 rpos += 2 + rpos[1];
2397 start = rpos;
2398
2399 while (rpos + 2 <= ric + ric_len &&
2400 rpos + 2 + rpos[1] <= ric + ric_len) {
2401 if (rpos[0] == WLAN_EID_RIC_DATA)
2402 break;
2403 rpos += 2 + rpos[1];
2404 }
2405 pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
2406 rdie->descr_count,
2407 start, rpos - start);
2408 }
2409
2410 return pos;
2411 }
2412
2413
2414 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
2415 size_t max_len, int auth_alg,
2416 const u8 *req_ies, size_t req_ies_len)
2417 {
2418 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
2419 u8 *fte_mic, *elem_count;
2420 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
2421 u8 rsnxe[10];
2422 size_t rsnxe_len;
2423 int res;
2424 struct wpa_auth_config *conf;
2425 struct wpa_ft_ies parse;
2426 u8 *ric_start;
2427 u8 *anonce, *snonce;
2428 const u8 *kck;
2429 size_t kck_len;
2430 int use_sha384;
2431
2432 if (sm == NULL)
2433 return pos;
2434
2435 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2436 conf = &sm->wpa_auth->conf;
2437
2438 if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
2439 return pos;
2440
2441 end = pos + max_len;
2442
2443 if (auth_alg == WLAN_AUTH_FT ||
2444 ((auth_alg == WLAN_AUTH_FILS_SK ||
2445 auth_alg == WLAN_AUTH_FILS_SK_PFS ||
2446 auth_alg == WLAN_AUTH_FILS_PK) &&
2447 (sm->wpa_key_mgmt & (WPA_KEY_MGMT_FT_FILS_SHA256 |
2448 WPA_KEY_MGMT_FT_FILS_SHA384)))) {
2449 if (!sm->pmk_r1_name_valid) {
2450 wpa_printf(MSG_ERROR,
2451 "FT: PMKR1Name is not valid for Assoc Resp RSNE");
2452 return NULL;
2453 }
2454 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name for Assoc Resp RSNE",
2455 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2456 /*
2457 * RSN (only present if this is a Reassociation Response and
2458 * part of a fast BSS transition; or if this is a
2459 * (Re)Association Response frame during an FT initial mobility
2460 * domain association using FILS)
2461 */
2462 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
2463 if (res < 0)
2464 return NULL;
2465 rsnie = pos;
2466 rsnie_len = res;
2467 pos += res;
2468 }
2469
2470 /* Mobility Domain Information */
2471 res = wpa_write_mdie(conf, pos, end - pos);
2472 if (res < 0)
2473 return NULL;
2474 mdie = pos;
2475 mdie_len = res;
2476 pos += res;
2477
2478 /* Fast BSS Transition Information */
2479 if (auth_alg == WLAN_AUTH_FT) {
2480 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
2481 if (!subelem) {
2482 wpa_printf(MSG_DEBUG,
2483 "FT: Failed to add GTK subelement");
2484 return NULL;
2485 }
2486 r0kh_id = sm->r0kh_id;
2487 r0kh_id_len = sm->r0kh_id_len;
2488 anonce = sm->ANonce;
2489 snonce = sm->SNonce;
2490 if (sm->mgmt_frame_prot) {
2491 u8 *igtk;
2492 size_t igtk_len;
2493 u8 *nbuf;
2494 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
2495 if (igtk == NULL) {
2496 wpa_printf(MSG_DEBUG,
2497 "FT: Failed to add IGTK subelement");
2498 os_free(subelem);
2499 return NULL;
2500 }
2501 nbuf = os_realloc(subelem, subelem_len + igtk_len);
2502 if (nbuf == NULL) {
2503 os_free(subelem);
2504 os_free(igtk);
2505 return NULL;
2506 }
2507 subelem = nbuf;
2508 os_memcpy(subelem + subelem_len, igtk, igtk_len);
2509 subelem_len += igtk_len;
2510 os_free(igtk);
2511 }
2512 #ifdef CONFIG_OCV
2513 if (wpa_auth_uses_ocv(sm)) {
2514 struct wpa_channel_info ci;
2515 u8 *nbuf, *ocipos;
2516
2517 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2518 wpa_printf(MSG_WARNING,
2519 "Failed to get channel info for OCI element");
2520 os_free(subelem);
2521 return NULL;
2522 }
2523
2524 subelem_len += 2 + OCV_OCI_LEN;
2525 nbuf = os_realloc(subelem, subelem_len);
2526 if (!nbuf) {
2527 os_free(subelem);
2528 return NULL;
2529 }
2530 subelem = nbuf;
2531
2532 ocipos = subelem + subelem_len - 2 - OCV_OCI_LEN;
2533 *ocipos++ = FTIE_SUBELEM_OCI;
2534 *ocipos++ = OCV_OCI_LEN;
2535 if (ocv_insert_oci(&ci, &ocipos) < 0) {
2536 os_free(subelem);
2537 return NULL;
2538 }
2539 }
2540 #endif /* CONFIG_OCV */
2541 } else {
2542 r0kh_id = conf->r0_key_holder;
2543 r0kh_id_len = conf->r0_key_holder_len;
2544 anonce = NULL;
2545 snonce = NULL;
2546 }
2547 res = wpa_write_ftie(conf, use_sha384, r0kh_id, r0kh_id_len,
2548 anonce, snonce, pos, end - pos,
2549 subelem, subelem_len);
2550 os_free(subelem);
2551 if (res < 0)
2552 return NULL;
2553 ftie = pos;
2554 ftie_len = res;
2555 pos += res;
2556
2557 if (use_sha384) {
2558 struct rsn_ftie_sha384 *_ftie =
2559 (struct rsn_ftie_sha384 *) (ftie + 2);
2560
2561 fte_mic = _ftie->mic;
2562 elem_count = &_ftie->mic_control[1];
2563 } else {
2564 struct rsn_ftie *_ftie = (struct rsn_ftie *) (ftie + 2);
2565
2566 fte_mic = _ftie->mic;
2567 elem_count = &_ftie->mic_control[1];
2568 }
2569 if (auth_alg == WLAN_AUTH_FT)
2570 *elem_count = 3; /* Information element count */
2571
2572 ric_start = pos;
2573 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse, use_sha384) == 0
2574 && parse.ric) {
2575 pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
2576 parse.ric_len);
2577 if (auth_alg == WLAN_AUTH_FT)
2578 *elem_count +=
2579 ieee802_11_ie_count(ric_start,
2580 pos - ric_start);
2581 }
2582 if (ric_start == pos)
2583 ric_start = NULL;
2584
2585 res = wpa_write_rsnxe(&sm->wpa_auth->conf, rsnxe, sizeof(rsnxe));
2586 if (res < 0)
2587 return NULL;
2588 rsnxe_len = res;
2589 if (auth_alg == WLAN_AUTH_FT && rsnxe_len)
2590 *elem_count += 1;
2591
2592 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2593 kck = sm->PTK.kck2;
2594 kck_len = sm->PTK.kck2_len;
2595 } else {
2596 kck = sm->PTK.kck;
2597 kck_len = sm->PTK.kck_len;
2598 }
2599 if (auth_alg == WLAN_AUTH_FT &&
2600 wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 6,
2601 mdie, mdie_len, ftie, ftie_len,
2602 rsnie, rsnie_len,
2603 ric_start, ric_start ? pos - ric_start : 0,
2604 rsnxe_len ? rsnxe : NULL, rsnxe_len,
2605 fte_mic) < 0) {
2606 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
2607 return NULL;
2608 }
2609
2610 os_free(sm->assoc_resp_ftie);
2611 sm->assoc_resp_ftie = os_malloc(ftie_len);
2612 if (!sm->assoc_resp_ftie)
2613 return NULL;
2614 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
2615
2616 return pos;
2617 }
2618
2619
2620 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
2621 int vlan_id,
2622 enum wpa_alg alg, const u8 *addr, int idx,
2623 u8 *key, size_t key_len)
2624 {
2625 if (wpa_auth->cb->set_key == NULL)
2626 return -1;
2627 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
2628 key, key_len);
2629 }
2630
2631
2632 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
2633 {
2634 enum wpa_alg alg;
2635 int klen;
2636
2637 /* MLME-SETKEYS.request(PTK) */
2638 alg = wpa_cipher_to_alg(sm->pairwise);
2639 klen = wpa_cipher_key_len(sm->pairwise);
2640 if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
2641 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
2642 "PTK configuration", sm->pairwise);
2643 return;
2644 }
2645
2646 if (sm->tk_already_set) {
2647 /* Must avoid TK reconfiguration to prevent clearing of TX/RX
2648 * PN in the driver */
2649 wpa_printf(MSG_DEBUG,
2650 "FT: Do not re-install same PTK to the driver");
2651 return;
2652 }
2653
2654 /* FIX: add STA entry to kernel/driver here? The set_key will fail
2655 * most likely without this.. At the moment, STA entry is added only
2656 * after association has been completed. This function will be called
2657 * again after association to get the PTK configured, but that could be
2658 * optimized by adding the STA entry earlier.
2659 */
2660 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2661 sm->PTK.tk, klen))
2662 return;
2663
2664 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2665 sm->pairwise_set = TRUE;
2666 sm->tk_already_set = TRUE;
2667 }
2668
2669
2670 /* Derive PMK-R1 from PSK, check all available PSK */
2671 static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm,
2672 const u8 *req_pmk_r1_name,
2673 u8 *out_pmk_r1, int *out_pairwise,
2674 struct vlan_description *out_vlan,
2675 const u8 **out_identity, size_t *out_identity_len,
2676 const u8 **out_radius_cui,
2677 size_t *out_radius_cui_len,
2678 int *out_session_timeout)
2679 {
2680 const u8 *pmk = NULL;
2681 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2682 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
2683 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2684 const u8 *mdid = wpa_auth->conf.mobility_domain;
2685 const u8 *r0kh = sm->r0kh_id;
2686 size_t r0kh_len = sm->r0kh_id_len;
2687 const u8 *r1kh = wpa_auth->conf.r1_key_holder;
2688 const u8 *ssid = wpa_auth->conf.ssid;
2689 size_t ssid_len = wpa_auth->conf.ssid_len;
2690 int pairwise;
2691
2692 pairwise = sm->pairwise;
2693
2694 for (;;) {
2695 pmk = wpa_ft_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr,
2696 pmk);
2697 if (pmk == NULL)
2698 break;
2699
2700 if (wpa_derive_pmk_r0(pmk, PMK_LEN, ssid, ssid_len, mdid, r0kh,
2701 r0kh_len, sm->addr,
2702 pmk_r0, pmk_r0_name, 0) < 0 ||
2703 wpa_derive_pmk_r1(pmk_r0, PMK_LEN, pmk_r0_name, r1kh,
2704 sm->addr, pmk_r1, pmk_r1_name) < 0 ||
2705 os_memcmp_const(pmk_r1_name, req_pmk_r1_name,
2706 WPA_PMK_NAME_LEN) != 0)
2707 continue;
2708
2709 /* We found a PSK that matches the requested pmk_r1_name */
2710 wpa_printf(MSG_DEBUG,
2711 "FT: Found PSK to generate PMK-R1 locally");
2712 os_memcpy(out_pmk_r1, pmk_r1, PMK_LEN);
2713 if (out_pairwise)
2714 *out_pairwise = pairwise;
2715 os_memcpy(sm->PMK, pmk, PMK_LEN);
2716 sm->pmk_len = PMK_LEN;
2717 if (out_vlan &&
2718 wpa_ft_get_vlan(sm->wpa_auth, sm->addr, out_vlan) < 0) {
2719 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA "
2720 MACSTR, MAC2STR(sm->addr));
2721 return -1;
2722 }
2723
2724 if (out_identity && out_identity_len) {
2725 *out_identity_len = wpa_ft_get_identity(
2726 sm->wpa_auth, sm->addr, out_identity);
2727 }
2728
2729 if (out_radius_cui && out_radius_cui_len) {
2730 *out_radius_cui_len = wpa_ft_get_radius_cui(
2731 sm->wpa_auth, sm->addr, out_radius_cui);
2732 }
2733
2734 if (out_session_timeout) {
2735 *out_session_timeout = wpa_ft_get_session_timeout(
2736 sm->wpa_auth, sm->addr);
2737 }
2738
2739 return 0;
2740 }
2741
2742 wpa_printf(MSG_DEBUG,
2743 "FT: Did not find PSK to generate PMK-R1 locally");
2744 return -1;
2745 }
2746
2747
2748 /* Detect the configuration the station asked for.
2749 * Required to detect FT-PSK and pairwise cipher.
2750 */
2751 static int wpa_ft_set_key_mgmt(struct wpa_state_machine *sm,
2752 struct wpa_ft_ies *parse)
2753 {
2754 int key_mgmt, ciphers;
2755
2756 if (sm->wpa_key_mgmt)
2757 return 0;
2758
2759 key_mgmt = parse->key_mgmt & sm->wpa_auth->conf.wpa_key_mgmt;
2760 if (!key_mgmt) {
2761 wpa_printf(MSG_DEBUG, "FT: Invalid key mgmt (0x%x) from "
2762 MACSTR, parse->key_mgmt, MAC2STR(sm->addr));
2763 return -1;
2764 }
2765 if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
2766 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
2767 #ifdef CONFIG_SHA384
2768 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2769 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
2770 #endif /* CONFIG_SHA384 */
2771 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
2772 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
2773 #ifdef CONFIG_FILS
2774 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256)
2775 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA256;
2776 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384)
2777 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA384;
2778 #endif /* CONFIG_FILS */
2779 ciphers = parse->pairwise_cipher & sm->wpa_auth->conf.rsn_pairwise;
2780 if (!ciphers) {
2781 wpa_printf(MSG_DEBUG, "FT: Invalid pairwise cipher (0x%x) from "
2782 MACSTR,
2783 parse->pairwise_cipher, MAC2STR(sm->addr));
2784 return -1;
2785 }
2786 sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0);
2787
2788 return 0;
2789 }
2790
2791
2792 static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
2793 struct wpa_state_machine *sm,
2794 const u8 *r0kh_id, size_t r0kh_id_len,
2795 const u8 *req_pmk_r0_name,
2796 const u8 *req_pmk_r1_name,
2797 u8 *out_pmk_r1, int *out_pairwise,
2798 struct vlan_description *vlan,
2799 const u8 **identity, size_t *identity_len,
2800 const u8 **radius_cui,
2801 size_t *radius_cui_len,
2802 int *out_session_timeout)
2803 {
2804 struct wpa_auth_config *conf = &wpa_auth->conf;
2805 const struct wpa_ft_pmk_r0_sa *r0;
2806 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
2807 int expires_in = 0;
2808 int session_timeout = 0;
2809 struct os_reltime now;
2810
2811 if (conf->r0_key_holder_len != r0kh_id_len ||
2812 os_memcmp(conf->r0_key_holder, r0kh_id, conf->r0_key_holder_len) !=
2813 0)
2814 return -1; /* not our R0KH-ID */
2815
2816 wpa_printf(MSG_DEBUG, "FT: STA R0KH-ID matching local configuration");
2817 if (wpa_ft_fetch_pmk_r0(sm->wpa_auth, sm->addr, req_pmk_r0_name, &r0) <
2818 0)
2819 return -1; /* no matching PMKR0Name in local cache */
2820
2821 wpa_printf(MSG_DEBUG, "FT: Requested PMKR0Name found in local cache");
2822
2823 if (wpa_derive_pmk_r1(r0->pmk_r0, r0->pmk_r0_len, r0->pmk_r0_name,
2824 conf->r1_key_holder,
2825 sm->addr, out_pmk_r1, pmk_r1_name) < 0)
2826 return -1;
2827 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", out_pmk_r1, r0->pmk_r0_len);
2828 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
2829
2830 os_get_reltime(&now);
2831 if (r0->expiration)
2832 expires_in = r0->expiration - now.sec;
2833
2834 if (r0->session_timeout)
2835 session_timeout = r0->session_timeout - now.sec;
2836
2837 wpa_ft_store_pmk_r1(wpa_auth, sm->addr, out_pmk_r1, r0->pmk_r0_len,
2838 pmk_r1_name,
2839 sm->pairwise, r0->vlan, expires_in, session_timeout,
2840 r0->identity, r0->identity_len,
2841 r0->radius_cui, r0->radius_cui_len);
2842
2843 *out_pairwise = sm->pairwise;
2844 if (vlan) {
2845 if (r0->vlan)
2846 *vlan = *r0->vlan;
2847 else
2848 os_memset(vlan, 0, sizeof(*vlan));
2849 }
2850
2851 if (identity && identity_len) {
2852 *identity = r0->identity;
2853 *identity_len = r0->identity_len;
2854 }
2855
2856 if (radius_cui && radius_cui_len) {
2857 *radius_cui = r0->radius_cui;
2858 *radius_cui_len = r0->radius_cui_len;
2859 }
2860
2861 *out_session_timeout = session_timeout;
2862
2863 return 0;
2864 }
2865
2866
2867 static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
2868 const u8 *ies, size_t ies_len,
2869 u8 **resp_ies, size_t *resp_ies_len)
2870 {
2871 struct rsn_mdie *mdie;
2872 u8 pmk_r1[PMK_LEN_MAX], pmk_r1_name[WPA_PMK_NAME_LEN];
2873 u8 ptk_name[WPA_PMK_NAME_LEN];
2874 struct wpa_auth_config *conf;
2875 struct wpa_ft_ies parse;
2876 size_t buflen;
2877 int ret;
2878 u8 *pos, *end;
2879 int pairwise, session_timeout = 0;
2880 struct vlan_description vlan;
2881 const u8 *identity, *radius_cui;
2882 size_t identity_len = 0, radius_cui_len = 0;
2883 int use_sha384;
2884 size_t pmk_r1_len;
2885
2886 *resp_ies = NULL;
2887 *resp_ies_len = 0;
2888
2889 sm->pmk_r1_name_valid = 0;
2890 conf = &sm->wpa_auth->conf;
2891
2892 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
2893 ies, ies_len);
2894
2895 if (wpa_ft_parse_ies(ies, ies_len, &parse, -1)) {
2896 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
2897 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2898 }
2899 use_sha384 = wpa_key_mgmt_sha384(parse.key_mgmt);
2900 pmk_r1_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
2901
2902 mdie = (struct rsn_mdie *) parse.mdie;
2903 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
2904 os_memcmp(mdie->mobility_domain,
2905 sm->wpa_auth->conf.mobility_domain,
2906 MOBILITY_DOMAIN_ID_LEN) != 0) {
2907 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
2908 return WLAN_STATUS_INVALID_MDIE;
2909 }
2910
2911 if (use_sha384) {
2912 struct rsn_ftie_sha384 *ftie;
2913
2914 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
2915 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
2916 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
2917 return WLAN_STATUS_INVALID_FTIE;
2918 }
2919
2920 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
2921 } else {
2922 struct rsn_ftie *ftie;
2923
2924 ftie = (struct rsn_ftie *) parse.ftie;
2925 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
2926 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
2927 return WLAN_STATUS_INVALID_FTIE;
2928 }
2929
2930 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
2931 }
2932
2933 if (parse.r0kh_id == NULL) {
2934 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
2935 return WLAN_STATUS_INVALID_FTIE;
2936 }
2937
2938 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
2939 parse.r0kh_id, parse.r0kh_id_len);
2940 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
2941 sm->r0kh_id_len = parse.r0kh_id_len;
2942
2943 if (parse.rsn_pmkid == NULL) {
2944 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
2945 return WLAN_STATUS_INVALID_PMKID;
2946 }
2947
2948 if (wpa_ft_set_key_mgmt(sm, &parse) < 0)
2949 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2950
2951 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
2952 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
2953 if (wpa_derive_pmk_r1_name(parse.rsn_pmkid,
2954 sm->wpa_auth->conf.r1_key_holder, sm->addr,
2955 pmk_r1_name, use_sha384) < 0)
2956 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2957 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
2958 pmk_r1_name, WPA_PMK_NAME_LEN);
2959
2960 if (conf->ft_psk_generate_local &&
2961 wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2962 if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise,
2963 &vlan, &identity, &identity_len,
2964 &radius_cui, &radius_cui_len,
2965 &session_timeout) < 0)
2966 return WLAN_STATUS_INVALID_PMKID;
2967 wpa_printf(MSG_DEBUG,
2968 "FT: Generated PMK-R1 for FT-PSK locally");
2969 } else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name,
2970 pmk_r1, &pmk_r1_len, &pairwise, &vlan,
2971 &identity, &identity_len, &radius_cui,
2972 &radius_cui_len, &session_timeout) < 0) {
2973 wpa_printf(MSG_DEBUG,
2974 "FT: No PMK-R1 available in local cache for the requested PMKR1Name");
2975 if (wpa_ft_local_derive_pmk_r1(sm->wpa_auth, sm,
2976 parse.r0kh_id, parse.r0kh_id_len,
2977 parse.rsn_pmkid,
2978 pmk_r1_name, pmk_r1, &pairwise,
2979 &vlan, &identity, &identity_len,
2980 &radius_cui, &radius_cui_len,
2981 &session_timeout) == 0) {
2982 wpa_printf(MSG_DEBUG,
2983 "FT: Generated PMK-R1 based on local PMK-R0");
2984 goto pmk_r1_derived;
2985 }
2986
2987 if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
2988 wpa_printf(MSG_DEBUG,
2989 "FT: Did not have matching PMK-R1 and either unknown or blocked R0KH-ID or NAK from R0KH");
2990 return WLAN_STATUS_INVALID_PMKID;
2991 }
2992
2993 return -1; /* Status pending */
2994 } else {
2995 wpa_printf(MSG_DEBUG, "FT: Found PMKR1Name from local cache");
2996 }
2997
2998 pmk_r1_derived:
2999 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, pmk_r1_len);
3000 sm->pmk_r1_name_valid = 1;
3001 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
3002 os_memcpy(sm->pmk_r1, pmk_r1, pmk_r1_len);
3003 sm->pmk_r1_len = pmk_r1_len;
3004
3005 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
3006 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
3007 "ANonce");
3008 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3009 }
3010
3011 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3012 sm->SNonce, WPA_NONCE_LEN);
3013 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
3014 sm->ANonce, WPA_NONCE_LEN);
3015
3016 if (wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
3017 sm->addr, sm->wpa_auth->addr, pmk_r1_name,
3018 &sm->PTK, ptk_name, sm->wpa_key_mgmt,
3019 pairwise) < 0)
3020 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3021
3022 sm->pairwise = pairwise;
3023 sm->PTK_valid = TRUE;
3024 sm->tk_already_set = FALSE;
3025 wpa_ft_install_ptk(sm);
3026
3027 if (wpa_ft_set_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
3028 wpa_printf(MSG_DEBUG, "FT: Failed to configure VLAN");
3029 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3030 }
3031 if (wpa_ft_set_identity(sm->wpa_auth, sm->addr,
3032 identity, identity_len) < 0 ||
3033 wpa_ft_set_radius_cui(sm->wpa_auth, sm->addr,
3034 radius_cui, radius_cui_len) < 0) {
3035 wpa_printf(MSG_DEBUG, "FT: Failed to configure identity/CUI");
3036 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3037 }
3038 wpa_ft_set_session_timeout(sm->wpa_auth, sm->addr, session_timeout);
3039
3040 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
3041 2 + FT_R1KH_ID_LEN + 200;
3042 *resp_ies = os_zalloc(buflen);
3043 if (*resp_ies == NULL)
3044 goto fail;
3045
3046 pos = *resp_ies;
3047 end = *resp_ies + buflen;
3048
3049 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
3050 if (ret < 0)
3051 goto fail;
3052 pos += ret;
3053
3054 ret = wpa_write_mdie(conf, pos, end - pos);
3055 if (ret < 0)
3056 goto fail;
3057 pos += ret;
3058
3059 ret = wpa_write_ftie(conf, use_sha384, parse.r0kh_id, parse.r0kh_id_len,
3060 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
3061 if (ret < 0)
3062 goto fail;
3063 pos += ret;
3064
3065 *resp_ies_len = pos - *resp_ies;
3066
3067 return WLAN_STATUS_SUCCESS;
3068 fail:
3069 os_free(*resp_ies);
3070 *resp_ies = NULL;
3071 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3072 }
3073
3074
3075 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
3076 u16 auth_transaction, const u8 *ies, size_t ies_len,
3077 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
3078 u16 auth_transaction, u16 status,
3079 const u8 *ies, size_t ies_len),
3080 void *ctx)
3081 {
3082 u16 status;
3083 u8 *resp_ies;
3084 size_t resp_ies_len;
3085 int res;
3086
3087 if (sm == NULL) {
3088 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
3089 "WPA SM not available");
3090 return;
3091 }
3092
3093 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
3094 " BSSID=" MACSTR " transaction=%d",
3095 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
3096 sm->ft_pending_cb = cb;
3097 sm->ft_pending_cb_ctx = ctx;
3098 sm->ft_pending_auth_transaction = auth_transaction;
3099 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3100 res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
3101 &resp_ies_len);
3102 if (res < 0) {
3103 wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
3104 return;
3105 }
3106 status = res;
3107
3108 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
3109 " auth_transaction=%d status=%u (%s)",
3110 MAC2STR(sm->addr), auth_transaction + 1, status,
3111 status2str(status));
3112 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3113 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
3114 resp_ies, resp_ies_len);
3115 os_free(resp_ies);
3116 }
3117
3118
3119 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
3120 size_t ies_len)
3121 {
3122 struct wpa_ft_ies parse;
3123 struct rsn_mdie *mdie;
3124 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
3125 size_t mic_len = 16;
3126 unsigned int count;
3127 const u8 *kck;
3128 size_t kck_len;
3129 int use_sha384;
3130 const u8 *anonce, *snonce, *fte_mic;
3131 u8 fte_elem_count;
3132
3133 if (sm == NULL)
3134 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3135
3136 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3137
3138 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
3139
3140 if (wpa_ft_parse_ies(ies, ies_len, &parse, use_sha384) < 0) {
3141 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
3142 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3143 }
3144
3145 if (parse.rsn == NULL) {
3146 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
3147 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3148 }
3149
3150 if (parse.rsn_pmkid == NULL) {
3151 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
3152 return WLAN_STATUS_INVALID_PMKID;
3153 }
3154
3155 if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
3156 != 0) {
3157 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
3158 "with the PMKR1Name derived from auth request");
3159 return WLAN_STATUS_INVALID_PMKID;
3160 }
3161
3162 mdie = (struct rsn_mdie *) parse.mdie;
3163 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
3164 os_memcmp(mdie->mobility_domain,
3165 sm->wpa_auth->conf.mobility_domain,
3166 MOBILITY_DOMAIN_ID_LEN) != 0) {
3167 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
3168 return WLAN_STATUS_INVALID_MDIE;
3169 }
3170
3171 if (use_sha384) {
3172 struct rsn_ftie_sha384 *ftie;
3173
3174 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
3175 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3176 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3177 return WLAN_STATUS_INVALID_FTIE;
3178 }
3179
3180 anonce = ftie->anonce;
3181 snonce = ftie->snonce;
3182 fte_elem_count = ftie->mic_control[1];
3183 fte_mic = ftie->mic;
3184 } else {
3185 struct rsn_ftie *ftie;
3186
3187 ftie = (struct rsn_ftie *) parse.ftie;
3188 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3189 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3190 return WLAN_STATUS_INVALID_FTIE;
3191 }
3192
3193 anonce = ftie->anonce;
3194 snonce = ftie->snonce;
3195 fte_elem_count = ftie->mic_control[1];
3196 fte_mic = ftie->mic;
3197 }
3198
3199 if (os_memcmp(snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
3200 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
3201 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3202 snonce, WPA_NONCE_LEN);
3203 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
3204 sm->SNonce, WPA_NONCE_LEN);
3205 return WLAN_STATUS_INVALID_FTIE;
3206 }
3207
3208 if (os_memcmp(anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
3209 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
3210 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
3211 anonce, WPA_NONCE_LEN);
3212 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
3213 sm->ANonce, WPA_NONCE_LEN);
3214 return WLAN_STATUS_INVALID_FTIE;
3215 }
3216
3217
3218 if (parse.r0kh_id == NULL) {
3219 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
3220 return WLAN_STATUS_INVALID_FTIE;
3221 }
3222
3223 if (parse.r0kh_id_len != sm->r0kh_id_len ||
3224 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
3225 {
3226 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
3227 "the current R0KH-ID");
3228 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
3229 parse.r0kh_id, parse.r0kh_id_len);
3230 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
3231 sm->r0kh_id, sm->r0kh_id_len);
3232 return WLAN_STATUS_INVALID_FTIE;
3233 }
3234
3235 if (parse.r1kh_id == NULL) {
3236 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
3237 return WLAN_STATUS_INVALID_FTIE;
3238 }
3239
3240 if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
3241 FT_R1KH_ID_LEN) != 0) {
3242 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
3243 "ReassocReq");
3244 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
3245 parse.r1kh_id, FT_R1KH_ID_LEN);
3246 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
3247 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
3248 return WLAN_STATUS_INVALID_FTIE;
3249 }
3250
3251 if (parse.rsn_pmkid == NULL ||
3252 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
3253 {
3254 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
3255 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
3256 return WLAN_STATUS_INVALID_PMKID;
3257 }
3258
3259 count = 3;
3260 if (parse.ric)
3261 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
3262 if (parse.rsnxe)
3263 count++;
3264 if (fte_elem_count != count) {
3265 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
3266 "Control: received %u expected %u",
3267 fte_elem_count, count);
3268 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3269 }
3270
3271 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
3272 kck = sm->PTK.kck2;
3273 kck_len = sm->PTK.kck2_len;
3274 } else {
3275 kck = sm->PTK.kck;
3276 kck_len = sm->PTK.kck_len;
3277 }
3278 if (wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 5,
3279 parse.mdie - 2, parse.mdie_len + 2,
3280 parse.ftie - 2, parse.ftie_len + 2,
3281 parse.rsn - 2, parse.rsn_len + 2,
3282 parse.ric, parse.ric_len,
3283 parse.rsnxe ? parse.rsnxe - 2 : NULL,
3284 parse.rsnxe ? parse.rsnxe_len + 2 : 0,
3285 mic) < 0) {
3286 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
3287 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3288 }
3289
3290 if (os_memcmp_const(mic, fte_mic, mic_len) != 0) {
3291 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
3292 wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
3293 MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
3294 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
3295 fte_mic, mic_len);
3296 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
3297 wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
3298 parse.mdie - 2, parse.mdie_len + 2);
3299 wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
3300 parse.ftie - 2, parse.ftie_len + 2);
3301 wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
3302 parse.rsn - 2, parse.rsn_len + 2);
3303 wpa_hexdump(MSG_MSGDUMP, "FT: RSNXE",
3304 parse.rsnxe ? parse.rsnxe - 2 : NULL,
3305 parse.rsnxe ? parse.rsnxe_len + 2 : 0);
3306 return WLAN_STATUS_INVALID_FTIE;
3307 }
3308
3309 #ifdef CONFIG_OCV
3310 if (wpa_auth_uses_ocv(sm)) {
3311 struct wpa_channel_info ci;
3312 int tx_chanwidth;
3313 int tx_seg1_idx;
3314
3315 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3316 wpa_printf(MSG_WARNING,
3317 "Failed to get channel info to validate received OCI in (Re)Assoc Request");
3318 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3319 }
3320
3321 if (get_sta_tx_parameters(sm,
3322 channel_width_to_int(ci.chanwidth),
3323 ci.seg1_idx, &tx_chanwidth,
3324 &tx_seg1_idx) < 0)
3325 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3326
3327 if (ocv_verify_tx_params(parse.oci, parse.oci_len, &ci,
3328 tx_chanwidth, tx_seg1_idx) != 0) {
3329 wpa_printf(MSG_WARNING, "%s", ocv_errorstr);
3330 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3331 }
3332 }
3333 #endif /* CONFIG_OCV */
3334
3335 return WLAN_STATUS_SUCCESS;
3336 }
3337
3338
3339 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
3340 {
3341 const u8 *sta_addr, *target_ap;
3342 const u8 *ies;
3343 size_t ies_len;
3344 u8 action;
3345 struct ft_rrb_frame *frame;
3346
3347 if (sm == NULL)
3348 return -1;
3349
3350 /*
3351 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3352 * FT Request action frame body[variable]
3353 */
3354
3355 if (len < 14) {
3356 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
3357 "(len=%lu)", (unsigned long) len);
3358 return -1;
3359 }
3360
3361 action = data[1];
3362 sta_addr = data + 2;
3363 target_ap = data + 8;
3364 ies = data + 14;
3365 ies_len = len - 14;
3366
3367 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
3368 " Target AP=" MACSTR " Action=%d)",
3369 MAC2STR(sta_addr), MAC2STR(target_ap), action);
3370
3371 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
3372 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
3373 "STA=" MACSTR " STA-Address=" MACSTR,
3374 MAC2STR(sm->addr), MAC2STR(sta_addr));
3375 return -1;
3376 }
3377
3378 /*
3379 * Do some sanity checking on the target AP address (not own and not
3380 * broadcast. This could be extended to filter based on a list of known
3381 * APs in the MD (if such a list were configured).
3382 */
3383 if ((target_ap[0] & 0x01) ||
3384 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
3385 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
3386 "frame");
3387 return -1;
3388 }
3389
3390 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
3391
3392 if (!sm->wpa_auth->conf.ft_over_ds) {
3393 wpa_printf(MSG_DEBUG, "FT: Over-DS option disabled - reject");
3394 return -1;
3395 }
3396
3397 /* RRB - Forward action frame to the target AP */
3398 frame = os_malloc(sizeof(*frame) + len);
3399 if (frame == NULL)
3400 return -1;
3401 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3402 frame->packet_type = FT_PACKET_REQUEST;
3403 frame->action_length = host_to_le16(len);
3404 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
3405 os_memcpy(frame + 1, data, len);
3406
3407 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
3408 sizeof(*frame) + len);
3409 os_free(frame);
3410
3411 return 0;
3412 }
3413
3414
3415 static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
3416 u16 auth_transaction, u16 resp,
3417 const u8 *ies, size_t ies_len)
3418 {
3419 struct wpa_state_machine *sm = ctx;
3420 wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
3421 MAC2STR(sm->addr));
3422 wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
3423 WLAN_STATUS_SUCCESS, ies, ies_len);
3424 }
3425
3426
3427 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
3428 const u8 *current_ap, const u8 *sta_addr,
3429 const u8 *body, size_t len)
3430 {
3431 struct wpa_state_machine *sm;
3432 u16 status;
3433 u8 *resp_ies;
3434 size_t resp_ies_len;
3435 int res;
3436
3437 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
3438 if (sm == NULL) {
3439 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
3440 "RRB Request");
3441 return -1;
3442 }
3443
3444 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
3445
3446 sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
3447 sm->ft_pending_cb_ctx = sm;
3448 os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
3449 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3450 res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
3451 &resp_ies_len);
3452 if (res < 0) {
3453 wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
3454 return 0;
3455 }
3456 status = res;
3457
3458 res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
3459 resp_ies, resp_ies_len);
3460 os_free(resp_ies);
3461 return res;
3462 }
3463
3464
3465 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
3466 const u8 *current_ap, const u8 *sta_addr,
3467 u16 status, const u8 *resp_ies,
3468 size_t resp_ies_len)
3469 {
3470 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3471 size_t rlen;
3472 struct ft_rrb_frame *frame;
3473 u8 *pos;
3474
3475 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
3476 " CurrentAP=" MACSTR " status=%u (%s)",
3477 MAC2STR(sm->addr), MAC2STR(current_ap), status,
3478 status2str(status));
3479 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3480
3481 /* RRB - Forward action frame response to the Current AP */
3482
3483 /*
3484 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3485 * Status_Code[2] FT Request action frame body[variable]
3486 */
3487 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
3488
3489 frame = os_malloc(sizeof(*frame) + rlen);
3490 if (frame == NULL)
3491 return -1;
3492 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3493 frame->packet_type = FT_PACKET_RESPONSE;
3494 frame->action_length = host_to_le16(rlen);
3495 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
3496 pos = (u8 *) (frame + 1);
3497 *pos++ = WLAN_ACTION_FT;
3498 *pos++ = 2; /* Action: Response */
3499 os_memcpy(pos, sta_addr, ETH_ALEN);
3500 pos += ETH_ALEN;
3501 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
3502 pos += ETH_ALEN;
3503 WPA_PUT_LE16(pos, status);
3504 pos += 2;
3505 if (resp_ies)
3506 os_memcpy(pos, resp_ies, resp_ies_len);
3507
3508 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
3509 sizeof(*frame) + rlen);
3510 os_free(frame);
3511
3512 return 0;
3513 }
3514
3515
3516 static int wpa_ft_rrb_build_r0(const u8 *key, const size_t key_len,
3517 const struct tlv_list *tlvs,
3518 const struct wpa_ft_pmk_r0_sa *pmk_r0,
3519 const u8 *r1kh_id, const u8 *s1kh_id,
3520 const struct tlv_list *tlv_auth,
3521 const u8 *src_addr, u8 type,
3522 u8 **packet, size_t *packet_len)
3523 {
3524 u8 pmk_r1[PMK_LEN_MAX];
3525 size_t pmk_r1_len = pmk_r0->pmk_r0_len;
3526 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
3527 u8 f_pairwise[sizeof(le16)];
3528 u8 f_expires_in[sizeof(le16)];
3529 u8 f_session_timeout[sizeof(le32)];
3530 int expires_in;
3531 int session_timeout;
3532 struct os_reltime now;
3533 int ret;
3534 struct tlv_list sess_tlv[] = {
3535 { .type = FT_RRB_PMK_R1, .len = pmk_r1_len,
3536 .data = pmk_r1 },
3537 { .type = FT_RRB_PMK_R1_NAME, .len = sizeof(pmk_r1_name),
3538 .data = pmk_r1_name },
3539 { .type = FT_RRB_PAIRWISE, .len = sizeof(f_pairwise),
3540 .data = f_pairwise },
3541 { .type = FT_RRB_EXPIRES_IN, .len = sizeof(f_expires_in),
3542 .data = f_expires_in },
3543 { .type = FT_RRB_IDENTITY, .len = pmk_r0->identity_len,
3544 .data = pmk_r0->identity },
3545 { .type = FT_RRB_RADIUS_CUI, .len = pmk_r0->radius_cui_len,
3546 .data = pmk_r0->radius_cui },
3547 { .type = FT_RRB_SESSION_TIMEOUT,
3548 .len = sizeof(f_session_timeout),
3549 .data = f_session_timeout },
3550 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
3551 };
3552
3553 if (wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_len,
3554 pmk_r0->pmk_r0_name, r1kh_id,
3555 s1kh_id, pmk_r1, pmk_r1_name) < 0)
3556 return -1;
3557 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 (for peer AP)",
3558 pmk_r1, pmk_r1_len);
3559 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name (for peer AP)",
3560 pmk_r1_name, WPA_PMK_NAME_LEN);
3561 WPA_PUT_LE16(f_pairwise, pmk_r0->pairwise);
3562
3563 os_get_reltime(&now);
3564 if (pmk_r0->expiration > now.sec)
3565 expires_in = pmk_r0->expiration - now.sec;
3566 else if (pmk_r0->expiration)
3567 expires_in = 1;
3568 else
3569 expires_in = 0;
3570 WPA_PUT_LE16(f_expires_in, expires_in);
3571
3572 if (pmk_r0->session_timeout > now.sec)
3573 session_timeout = pmk_r0->session_timeout - now.sec;
3574 else if (pmk_r0->session_timeout)
3575 session_timeout = 1;
3576 else
3577 session_timeout = 0;
3578 WPA_PUT_LE32(f_session_timeout, session_timeout);
3579
3580 ret = wpa_ft_rrb_build(key, key_len, tlvs, sess_tlv, tlv_auth,
3581 pmk_r0->vlan, src_addr, type,
3582 packet, packet_len);
3583
3584 forced_memzero(pmk_r1, sizeof(pmk_r1));
3585
3586 return ret;
3587 }
3588
3589
3590 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
3591 const u8 *src_addr,
3592 const u8 *enc, size_t enc_len,
3593 const u8 *auth, size_t auth_len,
3594 int no_defer)
3595 {
3596 const char *msgtype = "pull request";
3597 u8 *plain = NULL, *packet = NULL;
3598 size_t plain_len = 0, packet_len = 0;
3599 struct ft_remote_r1kh *r1kh, *r1kh_wildcard;
3600 const u8 *key;
3601 size_t key_len;
3602 int seq_ret;
3603 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id, *f_s1kh_id, *f_pmk_r0_name;
3604 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len, f_s1kh_id_len;
3605 size_t f_pmk_r0_name_len;
3606 const struct wpa_ft_pmk_r0_sa *r0;
3607 int ret;
3608 struct tlv_list resp[2];
3609 struct tlv_list resp_auth[5];
3610 struct ft_rrb_seq f_seq;
3611
3612 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
3613
3614 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3615 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3616
3617 if (wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len)) {
3618 wpa_printf(MSG_DEBUG, "FT: R0KH-ID mismatch");
3619 goto out;
3620 }
3621
3622 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3623 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3624
3625 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh, &r1kh_wildcard);
3626 if (r1kh) {
3627 key = r1kh->key;
3628 key_len = sizeof(r1kh->key);
3629 } else if (r1kh_wildcard) {
3630 wpa_printf(MSG_DEBUG, "FT: Using wildcard R1KH-ID");
3631 key = r1kh_wildcard->key;
3632 key_len = sizeof(r1kh_wildcard->key);
3633 } else {
3634 goto out;
3635 }
3636
3637 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "pull request", FT_RRB_NONCE_LEN);
3638 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
3639
3640 seq_ret = FT_RRB_SEQ_DROP;
3641 if (r1kh)
3642 seq_ret = wpa_ft_rrb_seq_chk(r1kh->seq, src_addr, enc, enc_len,
3643 auth, auth_len, msgtype, no_defer);
3644 if (!no_defer && r1kh_wildcard &&
3645 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
3646 /* wildcard: r1kh-id unknown or changed addr -> do a seq req */
3647 seq_ret = FT_RRB_SEQ_DEFER;
3648 }
3649
3650 if (seq_ret == FT_RRB_SEQ_DROP)
3651 goto out;
3652
3653 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3654 src_addr, FT_PACKET_R0KH_R1KH_PULL,
3655 &plain, &plain_len) < 0)
3656 goto out;
3657
3658 if (!r1kh)
3659 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard, src_addr,
3660 f_r1kh_id,
3661 wpa_auth->conf.rkh_pos_timeout);
3662 if (!r1kh)
3663 goto out;
3664
3665 if (seq_ret == FT_RRB_SEQ_DEFER) {
3666 wpa_ft_rrb_seq_req(wpa_auth, r1kh->seq, src_addr, f_r0kh_id,
3667 f_r0kh_id_len, f_r1kh_id, key, key_len,
3668 enc, enc_len, auth, auth_len,
3669 &wpa_ft_rrb_rx_pull);
3670 goto out;
3671 }
3672
3673 wpa_ft_rrb_seq_accept(wpa_auth, r1kh->seq, src_addr, auth, auth_len,
3674 msgtype);
3675 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
3676 wpa_auth->conf.rkh_pos_timeout);
3677
3678 RRB_GET(FT_RRB_PMK_R0_NAME, pmk_r0_name, msgtype, WPA_PMK_NAME_LEN);
3679 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", f_pmk_r0_name,
3680 f_pmk_r0_name_len);
3681
3682 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3683 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3684
3685 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
3686 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
3687 goto out;
3688 }
3689
3690 resp[0].type = FT_RRB_S1KH_ID;
3691 resp[0].len = f_s1kh_id_len;
3692 resp[0].data = f_s1kh_id;
3693 resp[1].type = FT_RRB_LAST_EMPTY;
3694 resp[1].len = 0;
3695 resp[1].data = NULL;
3696
3697 resp_auth[0].type = FT_RRB_NONCE;
3698 resp_auth[0].len = f_nonce_len;
3699 resp_auth[0].data = f_nonce;
3700 resp_auth[1].type = FT_RRB_SEQ;
3701 resp_auth[1].len = sizeof(f_seq);
3702 resp_auth[1].data = (u8 *) &f_seq;
3703 resp_auth[2].type = FT_RRB_R0KH_ID;
3704 resp_auth[2].len = f_r0kh_id_len;
3705 resp_auth[2].data = f_r0kh_id;
3706 resp_auth[3].type = FT_RRB_R1KH_ID;
3707 resp_auth[3].len = f_r1kh_id_len;
3708 resp_auth[3].data = f_r1kh_id;
3709 resp_auth[4].type = FT_RRB_LAST_EMPTY;
3710 resp_auth[4].len = 0;
3711 resp_auth[4].data = NULL;
3712
3713 if (wpa_ft_fetch_pmk_r0(wpa_auth, f_s1kh_id, f_pmk_r0_name, &r0) < 0) {
3714 wpa_printf(MSG_DEBUG, "FT: No matching PMK-R0-Name found");
3715 ret = wpa_ft_rrb_build(key, key_len, resp, NULL, resp_auth,
3716 NULL, wpa_auth->addr,
3717 FT_PACKET_R0KH_R1KH_RESP,
3718 &packet, &packet_len);
3719 } else {
3720 ret = wpa_ft_rrb_build_r0(key, key_len, resp, r0, f_r1kh_id,
3721 f_s1kh_id, resp_auth, wpa_auth->addr,
3722 FT_PACKET_R0KH_R1KH_RESP,
3723 &packet, &packet_len);
3724 }
3725
3726 if (!ret)
3727 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
3728 FT_PACKET_R0KH_R1KH_RESP, packet,
3729 packet_len);
3730
3731 out:
3732 os_free(plain);
3733 os_free(packet);
3734
3735 return 0;
3736 }
3737
3738
3739 /* @returns 0 on success
3740 * -1 on error
3741 * -2 if FR_RRB_PAIRWISE is missing
3742 */
3743 static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth,
3744 const u8 *src_addr, u8 type,
3745 const u8 *enc, size_t enc_len,
3746 const u8 *auth, size_t auth_len,
3747 const char *msgtype, u8 *s1kh_id_out,
3748 int (*cb)(struct wpa_authenticator *wpa_auth,
3749 const u8 *src_addr,
3750 const u8 *enc, size_t enc_len,
3751 const u8 *auth, size_t auth_len,
3752 int no_defer))
3753 {
3754 u8 *plain = NULL;
3755 size_t plain_len = 0;
3756 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
3757 const u8 *key;
3758 size_t key_len;
3759 int seq_ret;
3760 const u8 *f_r1kh_id, *f_s1kh_id, *f_r0kh_id;
3761 const u8 *f_pmk_r1_name, *f_pairwise, *f_pmk_r1;
3762 const u8 *f_expires_in;
3763 size_t f_r1kh_id_len, f_s1kh_id_len, f_r0kh_id_len;
3764 const u8 *f_identity, *f_radius_cui;
3765 const u8 *f_session_timeout;
3766 size_t f_pmk_r1_name_len, f_pairwise_len, f_pmk_r1_len;
3767 size_t f_expires_in_len;
3768 size_t f_identity_len, f_radius_cui_len;
3769 size_t f_session_timeout_len;
3770 int pairwise;
3771 int ret = -1;
3772 int expires_in;
3773 int session_timeout;
3774 struct vlan_description vlan;
3775 size_t pmk_r1_len;
3776
3777 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3778 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3779
3780 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3781 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3782
3783 if (wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id)) {
3784 wpa_printf(MSG_DEBUG, "FT: R1KH-ID mismatch");
3785 goto out;
3786 }
3787
3788 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, &r0kh,
3789 &r0kh_wildcard);
3790 if (r0kh) {
3791 key = r0kh->key;
3792 key_len = sizeof(r0kh->key);
3793 } else if (r0kh_wildcard) {
3794 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
3795 key = r0kh_wildcard->key;
3796 key_len = sizeof(r0kh_wildcard->key);
3797 } else {
3798 goto out;
3799 }
3800
3801 seq_ret = FT_RRB_SEQ_DROP;
3802 if (r0kh) {
3803 seq_ret = wpa_ft_rrb_seq_chk(r0kh->seq, src_addr, enc, enc_len,
3804 auth, auth_len, msgtype,
3805 cb ? 0 : 1);
3806 }
3807 if (cb && r0kh_wildcard &&
3808 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
3809 /* wildcard: r0kh-id unknown or changed addr -> do a seq req */
3810 seq_ret = FT_RRB_SEQ_DEFER;
3811 }
3812
3813 if (seq_ret == FT_RRB_SEQ_DROP)
3814 goto out;
3815
3816 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3817 src_addr, type, &plain, &plain_len) < 0)
3818 goto out;
3819
3820 if (!r0kh)
3821 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, src_addr,
3822 f_r0kh_id, f_r0kh_id_len,
3823 wpa_auth->conf.rkh_pos_timeout);
3824 if (!r0kh)
3825 goto out;
3826
3827 if (seq_ret == FT_RRB_SEQ_DEFER) {
3828 wpa_ft_rrb_seq_req(wpa_auth, r0kh->seq, src_addr, f_r0kh_id,
3829 f_r0kh_id_len, f_r1kh_id, key, key_len,
3830 enc, enc_len, auth, auth_len, cb);
3831 goto out;
3832 }
3833
3834 wpa_ft_rrb_seq_accept(wpa_auth, r0kh->seq, src_addr, auth, auth_len,
3835 msgtype);
3836 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
3837 wpa_auth->conf.rkh_pos_timeout);
3838
3839 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3840 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3841
3842 if (s1kh_id_out)
3843 os_memcpy(s1kh_id_out, f_s1kh_id, ETH_ALEN);
3844
3845 ret = -2;
3846 RRB_GET(FT_RRB_PAIRWISE, pairwise, msgtype, sizeof(le16));
3847 wpa_hexdump(MSG_DEBUG, "FT: pairwise", f_pairwise, f_pairwise_len);
3848
3849 ret = -1;
3850 RRB_GET(FT_RRB_PMK_R1_NAME, pmk_r1_name, msgtype, WPA_PMK_NAME_LEN);
3851 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
3852 f_pmk_r1_name, WPA_PMK_NAME_LEN);
3853
3854 pmk_r1_len = PMK_LEN;
3855 if (wpa_ft_rrb_get_tlv(plain, plain_len, FT_RRB_PMK_R1, &f_pmk_r1_len,
3856 &f_pmk_r1) == 0 &&
3857 (f_pmk_r1_len == PMK_LEN || f_pmk_r1_len == SHA384_MAC_LEN))
3858 pmk_r1_len = f_pmk_r1_len;
3859 RRB_GET(FT_RRB_PMK_R1, pmk_r1, msgtype, pmk_r1_len);
3860 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f_pmk_r1, pmk_r1_len);
3861
3862 pairwise = WPA_GET_LE16(f_pairwise);
3863
3864 RRB_GET_OPTIONAL(FT_RRB_EXPIRES_IN, expires_in, msgtype,
3865 sizeof(le16));
3866 if (f_expires_in)
3867 expires_in = WPA_GET_LE16(f_expires_in);
3868 else
3869 expires_in = 0;
3870
3871 wpa_printf(MSG_DEBUG, "FT: PMK-R1 %s - expires_in=%d", msgtype,
3872 expires_in);
3873
3874 if (wpa_ft_rrb_get_tlv_vlan(plain, plain_len, &vlan) < 0) {
3875 wpa_printf(MSG_DEBUG, "FT: Cannot parse vlan");
3876 wpa_ft_rrb_dump(plain, plain_len);
3877 goto out;
3878 }
3879
3880 wpa_printf(MSG_DEBUG, "FT: vlan %d%s",
3881 le_to_host16(vlan.untagged), vlan.tagged[0] ? "+" : "");
3882
3883 RRB_GET_OPTIONAL(FT_RRB_IDENTITY, identity, msgtype, -1);
3884 if (f_identity)
3885 wpa_hexdump_ascii(MSG_DEBUG, "FT: Identity", f_identity,
3886 f_identity_len);
3887
3888 RRB_GET_OPTIONAL(FT_RRB_RADIUS_CUI, radius_cui, msgtype, -1);
3889 if (f_radius_cui)
3890 wpa_hexdump_ascii(MSG_DEBUG, "FT: CUI", f_radius_cui,
3891 f_radius_cui_len);
3892
3893 RRB_GET_OPTIONAL(FT_RRB_SESSION_TIMEOUT, session_timeout, msgtype,
3894 sizeof(le32));
3895 if (f_session_timeout)
3896 session_timeout = WPA_GET_LE32(f_session_timeout);
3897 else
3898 session_timeout = 0;
3899 wpa_printf(MSG_DEBUG, "FT: session_timeout %d", session_timeout);
3900
3901 if (wpa_ft_store_pmk_r1(wpa_auth, f_s1kh_id, f_pmk_r1, pmk_r1_len,
3902 f_pmk_r1_name,
3903 pairwise, &vlan, expires_in, session_timeout,
3904 f_identity, f_identity_len, f_radius_cui,
3905 f_radius_cui_len) < 0)
3906 goto out;
3907
3908 ret = 0;
3909 out:
3910 bin_clear_free(plain, plain_len);
3911
3912 return ret;
3913
3914 }
3915
3916
3917 static void ft_finish_pull(struct wpa_state_machine *sm)
3918 {
3919 int res;
3920 u8 *resp_ies;
3921 size_t resp_ies_len;
3922 u16 status;
3923
3924 if (!sm->ft_pending_cb || !sm->ft_pending_req_ies)
3925 return;
3926
3927 res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
3928 wpabuf_len(sm->ft_pending_req_ies),
3929 &resp_ies, &resp_ies_len);
3930 if (res < 0) {
3931 /* this loop is broken by ft_pending_pull_left_retries */
3932 wpa_printf(MSG_DEBUG,
3933 "FT: Callback postponed until response is available");
3934 return;
3935 }
3936 wpabuf_free(sm->ft_pending_req_ies);
3937 sm->ft_pending_req_ies = NULL;
3938 status = res;
3939 wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
3940 " - status %u", MAC2STR(sm->addr), status);
3941
3942 sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
3943 sm->ft_pending_auth_transaction + 1, status,
3944 resp_ies, resp_ies_len);
3945 os_free(resp_ies);
3946 }
3947
3948
3949 struct ft_get_sta_ctx {
3950 const u8 *nonce;
3951 const u8 *s1kh_id;
3952 struct wpa_state_machine *sm;
3953 };
3954
3955
3956 static int ft_get_sta_cb(struct wpa_state_machine *sm, void *ctx)
3957 {
3958 struct ft_get_sta_ctx *info = ctx;
3959
3960 if ((info->s1kh_id &&
3961 os_memcmp(info->s1kh_id, sm->addr, ETH_ALEN) != 0) ||
3962 os_memcmp(info->nonce, sm->ft_pending_pull_nonce,
3963 FT_RRB_NONCE_LEN) != 0 ||
3964 sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
3965 return 0;
3966
3967 info->sm = sm;
3968
3969 return 1;
3970 }
3971
3972
3973 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
3974 const u8 *src_addr,
3975 const u8 *enc, size_t enc_len,
3976 const u8 *auth, size_t auth_len,
3977 int no_defer)
3978 {
3979 const char *msgtype = "pull response";
3980 int nak, ret = -1;
3981 struct ft_get_sta_ctx ctx;
3982 u8 s1kh_id[ETH_ALEN];
3983 const u8 *f_nonce;
3984 size_t f_nonce_len;
3985
3986 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
3987
3988 RRB_GET_AUTH(FT_RRB_NONCE, nonce, msgtype, FT_RRB_NONCE_LEN);
3989 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
3990
3991 os_memset(&ctx, 0, sizeof(ctx));
3992 ctx.nonce = f_nonce;
3993 if (!wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
3994 /* nonce not found */
3995 wpa_printf(MSG_DEBUG, "FT: Invalid nonce");
3996 return -1;
3997 }
3998
3999 ret = wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_RESP,
4000 enc, enc_len, auth, auth_len, msgtype, s1kh_id,
4001 no_defer ? NULL : &wpa_ft_rrb_rx_resp);
4002 if (ret == -2) {
4003 ret = 0;
4004 nak = 1;
4005 } else {
4006 nak = 0;
4007 }
4008 if (ret < 0)
4009 return -1;
4010
4011 ctx.s1kh_id = s1kh_id;
4012 if (wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
4013 wpa_printf(MSG_DEBUG,
4014 "FT: Response to a pending pull request for " MACSTR,
4015 MAC2STR(ctx.sm->addr));
4016 eloop_cancel_timeout(wpa_ft_expire_pull, ctx.sm, NULL);
4017 if (nak)
4018 ctx.sm->ft_pending_pull_left_retries = 0;
4019 ft_finish_pull(ctx.sm);
4020 }
4021
4022 out:
4023 return ret;
4024 }
4025
4026
4027 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
4028 const u8 *src_addr,
4029 const u8 *enc, size_t enc_len,
4030 const u8 *auth, size_t auth_len, int no_defer)
4031 {
4032 const char *msgtype = "push";
4033
4034 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
4035
4036 if (wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_PUSH,
4037 enc, enc_len, auth, auth_len, msgtype, NULL,
4038 no_defer ? NULL : wpa_ft_rrb_rx_push) < 0)
4039 return -1;
4040
4041 return 0;
4042 }
4043
4044
4045 static int wpa_ft_rrb_rx_seq(struct wpa_authenticator *wpa_auth,
4046 const u8 *src_addr, int type,
4047 const u8 *enc, size_t enc_len,
4048 const u8 *auth, size_t auth_len,
4049 struct ft_remote_seq **rkh_seq,
4050 u8 **key, size_t *key_len,
4051 struct ft_remote_r0kh **r0kh_out,
4052 struct ft_remote_r1kh **r1kh_out,
4053 struct ft_remote_r0kh **r0kh_wildcard_out,
4054 struct ft_remote_r1kh **r1kh_wildcard_out)
4055 {
4056 struct ft_remote_r0kh *r0kh = NULL;
4057 struct ft_remote_r1kh *r1kh = NULL;
4058 const u8 *f_r0kh_id, *f_r1kh_id;
4059 size_t f_r0kh_id_len, f_r1kh_id_len;
4060 int to_r0kh, to_r1kh;
4061 u8 *plain = NULL;
4062 size_t plain_len = 0;
4063 struct ft_remote_r0kh *r0kh_wildcard;
4064 struct ft_remote_r1kh *r1kh_wildcard;
4065
4066 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4067 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4068
4069 to_r0kh = !wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len);
4070 to_r1kh = !wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id);
4071
4072 if (to_r0kh && to_r1kh) {
4073 wpa_printf(MSG_DEBUG, "FT: seq - local R0KH-ID and R1KH-ID");
4074 goto out;
4075 }
4076
4077 if (!to_r0kh && !to_r1kh) {
4078 wpa_printf(MSG_DEBUG, "FT: seq - remote R0KH-ID and R1KH-ID");
4079 goto out;
4080 }
4081
4082 if (!to_r0kh) {
4083 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
4084 &r0kh, &r0kh_wildcard);
4085 if (!r0kh_wildcard &&
4086 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
4087 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
4088 f_r0kh_id, f_r0kh_id_len);
4089 goto out;
4090 }
4091 if (r0kh) {
4092 *key = r0kh->key;
4093 *key_len = sizeof(r0kh->key);
4094 } else {
4095 *key = r0kh_wildcard->key;
4096 *key_len = sizeof(r0kh_wildcard->key);
4097 }
4098 }
4099
4100 if (!to_r1kh) {
4101 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh,
4102 &r1kh_wildcard);
4103 if (!r1kh_wildcard &&
4104 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
4105 wpa_hexdump(MSG_DEBUG, "FT: Did not find R1KH-ID",
4106 f_r1kh_id, FT_R1KH_ID_LEN);
4107 goto out;
4108 }
4109 if (r1kh) {
4110 *key = r1kh->key;
4111 *key_len = sizeof(r1kh->key);
4112 } else {
4113 *key = r1kh_wildcard->key;
4114 *key_len = sizeof(r1kh_wildcard->key);
4115 }
4116 }
4117
4118 if (wpa_ft_rrb_decrypt(*key, *key_len, enc, enc_len, auth, auth_len,
4119 src_addr, type, &plain, &plain_len) < 0)
4120 goto out;
4121
4122 os_free(plain);
4123
4124 if (!to_r0kh) {
4125 if (!r0kh)
4126 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard,
4127 src_addr, f_r0kh_id,
4128 f_r0kh_id_len,
4129 ftRRBseqTimeout);
4130 if (!r0kh)
4131 goto out;
4132
4133 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, ftRRBseqTimeout);
4134 *rkh_seq = r0kh->seq;
4135 if (r0kh_out)
4136 *r0kh_out = r0kh;
4137 if (r0kh_wildcard_out)
4138 *r0kh_wildcard_out = r0kh_wildcard;
4139 }
4140
4141 if (!to_r1kh) {
4142 if (!r1kh)
4143 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard,
4144 src_addr, f_r1kh_id,
4145 ftRRBseqTimeout);
4146 if (!r1kh)
4147 goto out;
4148
4149 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, ftRRBseqTimeout);
4150 *rkh_seq = r1kh->seq;
4151 if (r1kh_out)
4152 *r1kh_out = r1kh;
4153 if (r1kh_wildcard_out)
4154 *r1kh_wildcard_out = r1kh_wildcard;
4155 }
4156
4157 return 0;
4158 out:
4159 return -1;
4160 }
4161
4162
4163 static int wpa_ft_rrb_rx_seq_req(struct wpa_authenticator *wpa_auth,
4164 const u8 *src_addr,
4165 const u8 *enc, size_t enc_len,
4166 const u8 *auth, size_t auth_len,
4167 int no_defer)
4168 {
4169 int ret = -1;
4170 struct ft_rrb_seq f_seq;
4171 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id;
4172 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len;
4173 struct ft_remote_seq *rkh_seq = NULL;
4174 u8 *packet = NULL, *key = NULL;
4175 size_t packet_len = 0, key_len = 0;
4176 struct tlv_list seq_resp_auth[5];
4177
4178 wpa_printf(MSG_DEBUG, "FT: Received sequence number request");
4179
4180 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
4181 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4182 &key_len, NULL, NULL, NULL, NULL) < 0)
4183 goto out;
4184
4185 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq request", FT_RRB_NONCE_LEN);
4186 wpa_hexdump(MSG_DEBUG, "FT: seq request - nonce", f_nonce, f_nonce_len);
4187
4188 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4189 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4190
4191 if (wpa_ft_new_seq(rkh_seq, &f_seq) < 0) {
4192 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4193 goto out;
4194 }
4195
4196 seq_resp_auth[0].type = FT_RRB_NONCE;
4197 seq_resp_auth[0].len = f_nonce_len;
4198 seq_resp_auth[0].data = f_nonce;
4199 seq_resp_auth[1].type = FT_RRB_SEQ;
4200 seq_resp_auth[1].len = sizeof(f_seq);
4201 seq_resp_auth[1].data = (u8 *) &f_seq;
4202 seq_resp_auth[2].type = FT_RRB_R0KH_ID;
4203 seq_resp_auth[2].len = f_r0kh_id_len;
4204 seq_resp_auth[2].data = f_r0kh_id;
4205 seq_resp_auth[3].type = FT_RRB_R1KH_ID;
4206 seq_resp_auth[3].len = FT_R1KH_ID_LEN;
4207 seq_resp_auth[3].data = f_r1kh_id;
4208 seq_resp_auth[4].type = FT_RRB_LAST_EMPTY;
4209 seq_resp_auth[4].len = 0;
4210 seq_resp_auth[4].data = NULL;
4211
4212 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_resp_auth, NULL,
4213 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4214 &packet, &packet_len) < 0)
4215 goto out;
4216
4217 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
4218 FT_PACKET_R0KH_R1KH_SEQ_RESP, packet,
4219 packet_len);
4220
4221 out:
4222 os_free(packet);
4223
4224 return ret;
4225 }
4226
4227
4228 static int wpa_ft_rrb_rx_seq_resp(struct wpa_authenticator *wpa_auth,
4229 const u8 *src_addr,
4230 const u8 *enc, size_t enc_len,
4231 const u8 *auth, size_t auth_len,
4232 int no_defer)
4233 {
4234 u8 *key = NULL;
4235 size_t key_len = 0;
4236 struct ft_remote_r0kh *r0kh = NULL, *r0kh_wildcard = NULL;
4237 struct ft_remote_r1kh *r1kh = NULL, *r1kh_wildcard = NULL;
4238 const u8 *f_nonce, *f_seq;
4239 size_t f_nonce_len, f_seq_len;
4240 struct ft_remote_seq *rkh_seq = NULL;
4241 struct ft_remote_item *item;
4242 struct os_reltime now, now_remote;
4243 int seq_ret, found;
4244 const struct ft_rrb_seq *msg_both;
4245 u32 msg_dom, msg_seq;
4246
4247 wpa_printf(MSG_DEBUG, "FT: Received sequence number response");
4248
4249 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4250 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4251 &key_len, &r0kh, &r1kh, &r0kh_wildcard,
4252 &r1kh_wildcard) < 0)
4253 goto out;
4254
4255 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq response", FT_RRB_NONCE_LEN);
4256 wpa_hexdump(MSG_DEBUG, "FT: seq response - nonce", f_nonce,
4257 f_nonce_len);
4258
4259 found = 0;
4260 dl_list_for_each(item, &rkh_seq->rx.queue, struct ft_remote_item,
4261 list) {
4262 if (os_memcmp_const(f_nonce, item->nonce,
4263 FT_RRB_NONCE_LEN) != 0 ||
4264 os_get_reltime(&now) < 0 ||
4265 os_reltime_expired(&now, &item->nonce_ts, ftRRBseqTimeout))
4266 continue;
4267
4268 found = 1;
4269 break;
4270 }
4271 if (!found) {
4272 wpa_printf(MSG_DEBUG, "FT: seq response - bad nonce");
4273 goto out;
4274 }
4275
4276 if (r0kh) {
4277 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
4278 wpa_auth->conf.rkh_pos_timeout);
4279 if (r0kh_wildcard)
4280 os_memcpy(r0kh->addr, src_addr, ETH_ALEN);
4281 }
4282
4283 if (r1kh) {
4284 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
4285 wpa_auth->conf.rkh_pos_timeout);
4286 if (r1kh_wildcard)
4287 os_memcpy(r1kh->addr, src_addr, ETH_ALEN);
4288 }
4289
4290 seq_ret = wpa_ft_rrb_seq_chk(rkh_seq, src_addr, enc, enc_len, auth,
4291 auth_len, "seq response", 1);
4292 if (seq_ret == FT_RRB_SEQ_OK) {
4293 wpa_printf(MSG_DEBUG, "FT: seq response - valid seq number");
4294 wpa_ft_rrb_seq_accept(wpa_auth, rkh_seq, src_addr, auth,
4295 auth_len, "seq response");
4296 } else {
4297 wpa_printf(MSG_DEBUG, "FT: seq response - reset seq number");
4298
4299 RRB_GET_AUTH(FT_RRB_SEQ, seq, "seq response",
4300 sizeof(*msg_both));
4301 msg_both = (const struct ft_rrb_seq *) f_seq;
4302
4303 msg_dom = le_to_host32(msg_both->dom);
4304 msg_seq = le_to_host32(msg_both->seq);
4305 now_remote.sec = le_to_host32(msg_both->ts);
4306 now_remote.usec = 0;
4307
4308 rkh_seq->rx.num_last = 2;
4309 rkh_seq->rx.dom = msg_dom;
4310 rkh_seq->rx.offsetidx = 0;
4311 /* Accept some older, possibly cached packets as well */
4312 rkh_seq->rx.last[0] = msg_seq - FT_REMOTE_SEQ_BACKLOG -
4313 dl_list_len(&rkh_seq->rx.queue);
4314 rkh_seq->rx.last[1] = msg_seq;
4315
4316 /* local time - offset = remote time
4317 * <=> local time - remote time = offset */
4318 os_reltime_sub(&now, &now_remote, &rkh_seq->rx.time_offset);
4319 }
4320
4321 wpa_ft_rrb_seq_flush(wpa_auth, rkh_seq, 1);
4322
4323 return 0;
4324 out:
4325 return -1;
4326 }
4327
4328
4329 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4330 const u8 *data, size_t data_len)
4331 {
4332 struct ft_rrb_frame *frame;
4333 u16 alen;
4334 const u8 *pos, *end, *start;
4335 u8 action;
4336 const u8 *sta_addr, *target_ap_addr;
4337
4338 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
4339 MAC2STR(src_addr));
4340
4341 if (data_len < sizeof(*frame)) {
4342 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
4343 (unsigned long) data_len);
4344 return -1;
4345 }
4346
4347 pos = data;
4348 frame = (struct ft_rrb_frame *) pos;
4349 pos += sizeof(*frame);
4350
4351 alen = le_to_host16(frame->action_length);
4352 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
4353 "action_length=%d ap_address=" MACSTR,
4354 frame->frame_type, frame->packet_type, alen,
4355 MAC2STR(frame->ap_address));
4356
4357 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
4358 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
4359 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
4360 "unrecognized type %d", frame->frame_type);
4361 return -1;
4362 }
4363
4364 if (alen > data_len - sizeof(*frame)) {
4365 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
4366 "frame");
4367 return -1;
4368 }
4369
4370 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
4371
4372 if (alen < 1 + 1 + 2 * ETH_ALEN) {
4373 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
4374 "room for Action Frame body); alen=%lu",
4375 (unsigned long) alen);
4376 return -1;
4377 }
4378 start = pos;
4379 end = pos + alen;
4380
4381 if (*pos != WLAN_ACTION_FT) {
4382 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
4383 "%d", *pos);
4384 return -1;
4385 }
4386
4387 pos++;
4388 action = *pos++;
4389 sta_addr = pos;
4390 pos += ETH_ALEN;
4391 target_ap_addr = pos;
4392 pos += ETH_ALEN;
4393 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
4394 MACSTR " target_ap_addr=" MACSTR,
4395 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
4396
4397 if (frame->packet_type == FT_PACKET_REQUEST) {
4398 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
4399
4400 if (action != 1) {
4401 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
4402 "RRB Request", action);
4403 return -1;
4404 }
4405
4406 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
4407 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
4408 "RRB Request does not match with own "
4409 "address");
4410 return -1;
4411 }
4412
4413 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
4414 sta_addr, pos, end - pos) < 0)
4415 return -1;
4416 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
4417 u16 status_code;
4418
4419 if (end - pos < 2) {
4420 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
4421 "code in RRB Response");
4422 return -1;
4423 }
4424 status_code = WPA_GET_LE16(pos);
4425 pos += 2;
4426
4427 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
4428 "(status_code=%d)", status_code);
4429
4430 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
4431 return -1;
4432 } else {
4433 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
4434 "packet_type %d", frame->packet_type);
4435 return -1;
4436 }
4437
4438 if (end > pos) {
4439 wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end",
4440 pos, end - pos);
4441 }
4442
4443 return 0;
4444 }
4445
4446
4447 void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4448 const u8 *dst_addr, u8 oui_suffix, const u8 *data,
4449 size_t data_len)
4450 {
4451 const u8 *auth, *enc;
4452 size_t alen, elen;
4453 int no_defer = 0;
4454
4455 wpa_printf(MSG_DEBUG, "FT: RRB-OUI received frame from remote AP "
4456 MACSTR, MAC2STR(src_addr));
4457 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame - oui_suffix=%d", oui_suffix);
4458 wpa_hexdump(MSG_MSGDUMP, "FT: RRB frame payload", data, data_len);
4459
4460 if (is_multicast_ether_addr(src_addr)) {
4461 wpa_printf(MSG_DEBUG,
4462 "FT: RRB-OUI received frame from multicast address "
4463 MACSTR, MAC2STR(src_addr));
4464 return;
4465 }
4466
4467 if (is_multicast_ether_addr(dst_addr)) {
4468 wpa_printf(MSG_DEBUG,
4469 "FT: RRB-OUI received frame from remote AP " MACSTR
4470 " to multicast address " MACSTR,
4471 MAC2STR(src_addr), MAC2STR(dst_addr));
4472 no_defer = 1;
4473 }
4474
4475 if (data_len < sizeof(u16)) {
4476 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4477 return;
4478 }
4479
4480 alen = WPA_GET_LE16(data);
4481 if (data_len < sizeof(u16) + alen) {
4482 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4483 return;
4484 }
4485
4486 auth = data + sizeof(u16);
4487 wpa_hexdump(MSG_MSGDUMP, "FT: Authenticated payload", auth, alen);
4488 enc = data + sizeof(u16) + alen;
4489 elen = data_len - sizeof(u16) - alen;
4490 wpa_hexdump(MSG_MSGDUMP, "FT: Encrypted payload", enc, elen);
4491
4492 switch (oui_suffix) {
4493 case FT_PACKET_R0KH_R1KH_PULL:
4494 wpa_ft_rrb_rx_pull(wpa_auth, src_addr, enc, elen, auth, alen,
4495 no_defer);
4496 break;
4497 case FT_PACKET_R0KH_R1KH_RESP:
4498 wpa_ft_rrb_rx_resp(wpa_auth, src_addr, enc, elen, auth, alen,
4499 no_defer);
4500 break;
4501 case FT_PACKET_R0KH_R1KH_PUSH:
4502 wpa_ft_rrb_rx_push(wpa_auth, src_addr, enc, elen, auth, alen,
4503 no_defer);
4504 break;
4505 case FT_PACKET_R0KH_R1KH_SEQ_REQ:
4506 wpa_ft_rrb_rx_seq_req(wpa_auth, src_addr, enc, elen, auth, alen,
4507 no_defer);
4508 break;
4509 case FT_PACKET_R0KH_R1KH_SEQ_RESP:
4510 wpa_ft_rrb_rx_seq_resp(wpa_auth, src_addr, enc, elen, auth,
4511 alen, no_defer);
4512 break;
4513 }
4514 }
4515
4516
4517 static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
4518 struct wpa_ft_pmk_r0_sa *pmk_r0,
4519 struct ft_remote_r1kh *r1kh,
4520 const u8 *s1kh_id)
4521 {
4522 u8 *packet;
4523 size_t packet_len;
4524 struct ft_rrb_seq f_seq;
4525 struct tlv_list push[] = {
4526 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
4527 .data = s1kh_id },
4528 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
4529 .data = pmk_r0->pmk_r0_name },
4530 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4531 };
4532 struct tlv_list push_auth[] = {
4533 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
4534 .data = (u8 *) &f_seq },
4535 { .type = FT_RRB_R0KH_ID,
4536 .len = wpa_auth->conf.r0_key_holder_len,
4537 .data = wpa_auth->conf.r0_key_holder },
4538 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
4539 .data = r1kh->id },
4540 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4541 };
4542
4543 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
4544 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4545 return -1;
4546 }
4547
4548 if (wpa_ft_rrb_build_r0(r1kh->key, sizeof(r1kh->key), push, pmk_r0,
4549 r1kh->id, s1kh_id, push_auth, wpa_auth->addr,
4550 FT_PACKET_R0KH_R1KH_PUSH,
4551 &packet, &packet_len) < 0)
4552 return -1;
4553
4554 wpa_ft_rrb_oui_send(wpa_auth, r1kh->addr, FT_PACKET_R0KH_R1KH_PUSH,
4555 packet, packet_len);
4556
4557 os_free(packet);
4558 return 0;
4559 }
4560
4561
4562 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
4563 {
4564 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
4565 struct wpa_ft_pmk_r0_sa *r0, *r0found = NULL;
4566 struct ft_remote_r1kh *r1kh;
4567
4568 if (!wpa_auth->conf.pmk_r1_push)
4569 return;
4570 if (!wpa_auth->conf.r1kh_list)
4571 return;
4572
4573 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
4574 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) {
4575 r0found = r0;
4576 break;
4577 }
4578 }
4579
4580 r0 = r0found;
4581 if (r0 == NULL || r0->pmk_r1_pushed)
4582 return;
4583 r0->pmk_r1_pushed = 1;
4584
4585 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
4586 "for STA " MACSTR, MAC2STR(addr));
4587
4588 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
4589 if (is_zero_ether_addr(r1kh->addr) ||
4590 is_zero_ether_addr(r1kh->id))
4591 continue;
4592 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
4593 continue;
4594 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
4595 }
4596 }
4597
4598 #endif /* CONFIG_IEEE80211R_AP */
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