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 */
wpa_ft_rrb_decrypt(const u8 * key,const size_t key_len,const u8 * enc,size_t enc_len,const u8 * auth,const size_t auth_len,const u8 * src_addr,u8 type,u8 ** plain,size_t * plain_size)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 */
wpa_ft_rrb_get_tlv(const u8 * plain,size_t plain_len,u16 type,size_t * tlv_len,const u8 ** tlv_data)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
wpa_ft_rrb_dump(const u8 * plain,const size_t plain_len)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
cmp_int(const void * a,const void * b)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
wpa_ft_rrb_get_tlv_vlan(const u8 * plain,const size_t plain_len,struct vlan_description * vlan)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
wpa_ft_tlv_len(const struct tlv_list * tlvs)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
wpa_ft_tlv_lin(const struct tlv_list * tlvs,u8 * start,u8 * endpos)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
wpa_ft_vlan_len(const struct vlan_description * vlan)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
wpa_ft_vlan_lin(const struct vlan_description * vlan,u8 * start,u8 * endpos)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
wpa_ft_rrb_lin(const struct tlv_list * tlvs1,const struct tlv_list * tlvs2,const struct vlan_description * vlan,u8 ** plain,size_t * plain_len)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
wpa_ft_rrb_encrypt(const u8 * key,const size_t key_len,const u8 * plain,const size_t plain_len,const u8 * auth,const size_t auth_len,const u8 * src_addr,u8 type,u8 * enc)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 */
wpa_ft_rrb_build(const u8 * key,const size_t key_len,const struct tlv_list * tlvs_enc0,const struct tlv_list * tlvs_enc1,const struct tlv_list * tlvs_auth,const struct vlan_description * vlan,const u8 * src_addr,u8 type,u8 ** packet,size_t * packet_len)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
wpa_ft_rrb_send(struct wpa_authenticator * wpa_auth,const u8 * dst,const u8 * data,size_t data_len)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
wpa_ft_rrb_oui_send(struct wpa_authenticator * wpa_auth,const u8 * dst,u8 oui_suffix,const u8 * data,size_t data_len)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
wpa_ft_action_send(struct wpa_authenticator * wpa_auth,const u8 * dst,const u8 * data,size_t data_len)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
wpa_ft_get_psk(struct wpa_authenticator * wpa_auth,const u8 * addr,const u8 * p2p_dev_addr,const u8 * prev_psk)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 *
wpa_ft_add_sta(struct wpa_authenticator * wpa_auth,const u8 * sta_addr)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
wpa_ft_set_vlan(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,struct vlan_description * vlan)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
wpa_ft_get_vlan(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,struct vlan_description * vlan)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
wpa_ft_set_identity(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,const u8 * identity,size_t identity_len)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
wpa_ft_get_identity(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,const u8 ** buf)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
wpa_ft_set_radius_cui(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,const u8 * radius_cui,size_t radius_cui_len)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
wpa_ft_get_radius_cui(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,const u8 ** buf)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
wpa_ft_set_session_timeout(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,int session_timeout)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
wpa_ft_get_session_timeout(struct wpa_authenticator * wpa_auth,const u8 * sta_addr)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
wpa_ft_add_tspec(struct wpa_authenticator * wpa_auth,const u8 * sta_addr,u8 * tspec_ie,size_t tspec_ielen)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
wpa_channel_info(struct wpa_authenticator * wpa_auth,struct wpa_channel_info * ci)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
wpa_write_mdie(struct wpa_auth_config * conf,u8 * buf,size_t len)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
wpa_write_ftie(struct wpa_auth_config * conf,int use_sha384,const u8 * r0kh_id,size_t r0kh_id_len,const u8 * anonce,const u8 * snonce,u8 * buf,size_t len,const u8 * subelem,size_t subelem_len,int rsnxe_used)807 int wpa_write_ftie(struct wpa_auth_config *conf, int use_sha384,
808 const u8 *r0kh_id, size_t r0kh_id_len,
809 const u8 *anonce, const u8 *snonce,
810 u8 *buf, size_t len, const u8 *subelem,
811 size_t subelem_len, int rsnxe_used)
812 {
813 u8 *pos = buf, *ielen;
814 size_t hdrlen = use_sha384 ? sizeof(struct rsn_ftie_sha384) :
815 sizeof(struct rsn_ftie);
816
817 if (len < 2 + hdrlen + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
818 subelem_len)
819 return -1;
820
821 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
822 ielen = pos++;
823
824 if (use_sha384) {
825 struct rsn_ftie_sha384 *hdr = (struct rsn_ftie_sha384 *) pos;
826
827 os_memset(hdr, 0, sizeof(*hdr));
828 pos += sizeof(*hdr);
829 WPA_PUT_LE16(hdr->mic_control, !!rsnxe_used);
830 if (anonce)
831 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
832 if (snonce)
833 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
834 } else {
835 struct rsn_ftie *hdr = (struct rsn_ftie *) pos;
836
837 os_memset(hdr, 0, sizeof(*hdr));
838 pos += sizeof(*hdr);
839 WPA_PUT_LE16(hdr->mic_control, !!rsnxe_used);
840 if (anonce)
841 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
842 if (snonce)
843 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
844 }
845
846 /* Optional Parameters */
847 *pos++ = FTIE_SUBELEM_R1KH_ID;
848 *pos++ = FT_R1KH_ID_LEN;
849 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
850 pos += FT_R1KH_ID_LEN;
851
852 if (r0kh_id) {
853 *pos++ = FTIE_SUBELEM_R0KH_ID;
854 *pos++ = r0kh_id_len;
855 os_memcpy(pos, r0kh_id, r0kh_id_len);
856 pos += r0kh_id_len;
857 }
858
859 if (subelem) {
860 os_memcpy(pos, subelem, subelem_len);
861 pos += subelem_len;
862 }
863
864 *ielen = pos - buf - 2;
865
866 return pos - buf;
867 }
868
869
870 /* A packet to be handled after seq response */
871 struct ft_remote_item {
872 struct dl_list list;
873
874 u8 nonce[FT_RRB_NONCE_LEN];
875 struct os_reltime nonce_ts;
876
877 u8 src_addr[ETH_ALEN];
878 u8 *enc;
879 size_t enc_len;
880 u8 *auth;
881 size_t auth_len;
882 int (*cb)(struct wpa_authenticator *wpa_auth,
883 const u8 *src_addr,
884 const u8 *enc, size_t enc_len,
885 const u8 *auth, size_t auth_len,
886 int no_defer);
887 };
888
889
wpa_ft_rrb_seq_free(struct ft_remote_item * item)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
wpa_ft_rrb_seq_flush(struct wpa_authenticator * wpa_auth,struct ft_remote_seq * rkh_seq,int cb)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
wpa_ft_rrb_seq_timeout(void * eloop_ctx,void * timeout_ctx)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
wpa_ft_rrb_seq_req(struct wpa_authenticator * wpa_auth,struct ft_remote_seq * rkh_seq,const u8 * src_addr,const u8 * f_r0kh_id,size_t f_r0kh_id_len,const u8 * f_r1kh_id,const u8 * key,size_t key_len,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int (* cb)(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer))924 wpa_ft_rrb_seq_req(struct wpa_authenticator *wpa_auth,
925 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
926 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
927 const u8 *f_r1kh_id, const u8 *key, size_t key_len,
928 const u8 *enc, size_t enc_len,
929 const u8 *auth, size_t auth_len,
930 int (*cb)(struct wpa_authenticator *wpa_auth,
931 const u8 *src_addr,
932 const u8 *enc, size_t enc_len,
933 const u8 *auth, size_t auth_len,
934 int no_defer))
935 {
936 struct ft_remote_item *item = NULL;
937 u8 *packet = NULL;
938 size_t packet_len;
939 struct tlv_list seq_req_auth[] = {
940 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
941 .data = NULL /* to be filled: item->nonce */ },
942 { .type = FT_RRB_R0KH_ID, .len = f_r0kh_id_len,
943 .data = f_r0kh_id },
944 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
945 .data = f_r1kh_id },
946 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
947 };
948
949 if (dl_list_len(&rkh_seq->rx.queue) >= ftRRBmaxQueueLen) {
950 wpa_printf(MSG_DEBUG, "FT: Sequence number queue too long");
951 goto err;
952 }
953
954 wpa_printf(MSG_DEBUG, "FT: Send sequence number request from " MACSTR
955 " to " MACSTR,
956 MAC2STR(wpa_auth->addr), MAC2STR(src_addr));
957 item = os_zalloc(sizeof(*item));
958 if (!item)
959 goto err;
960
961 os_memcpy(item->src_addr, src_addr, ETH_ALEN);
962 item->cb = cb;
963
964 if (random_get_bytes(item->nonce, FT_RRB_NONCE_LEN) < 0) {
965 wpa_printf(MSG_DEBUG, "FT: Seq num nonce: out of random bytes");
966 goto err;
967 }
968
969 if (os_get_reltime(&item->nonce_ts) < 0)
970 goto err;
971
972 if (enc && enc_len > 0) {
973 item->enc = os_memdup(enc, enc_len);
974 item->enc_len = enc_len;
975 if (!item->enc)
976 goto err;
977 }
978
979 if (auth && auth_len > 0) {
980 item->auth = os_memdup(auth, auth_len);
981 item->auth_len = auth_len;
982 if (!item->auth)
983 goto err;
984 }
985
986 eloop_register_timeout(ftRRBseqTimeout, 0, wpa_ft_rrb_seq_timeout,
987 wpa_auth, item);
988
989 seq_req_auth[0].data = item->nonce;
990
991 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_req_auth, NULL,
992 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
993 &packet, &packet_len) < 0) {
994 item = NULL; /* some other seq resp might still accept this */
995 goto err;
996 }
997
998 dl_list_add(&rkh_seq->rx.queue, &item->list);
999
1000 wpa_ft_rrb_oui_send(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
1001 packet, packet_len);
1002
1003 os_free(packet);
1004
1005 return 0;
1006 err:
1007 wpa_printf(MSG_DEBUG, "FT: Failed to send sequence number request");
1008 if (item) {
1009 os_free(item->auth);
1010 bin_clear_free(item->enc, item->enc_len);
1011 os_free(item);
1012 }
1013
1014 return -1;
1015 }
1016
1017
1018 #define FT_RRB_SEQ_OK 0
1019 #define FT_RRB_SEQ_DROP 1
1020 #define FT_RRB_SEQ_DEFER 2
1021
1022 static int
wpa_ft_rrb_seq_chk(struct ft_remote_seq * rkh_seq,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,const char * msgtype,int no_defer)1023 wpa_ft_rrb_seq_chk(struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1024 const u8 *enc, size_t enc_len,
1025 const u8 *auth, size_t auth_len,
1026 const char *msgtype, int no_defer)
1027 {
1028 const u8 *f_seq;
1029 size_t f_seq_len;
1030 const struct ft_rrb_seq *msg_both;
1031 u32 msg_seq, msg_off, rkh_off;
1032 struct os_reltime now;
1033 unsigned int i;
1034
1035 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1036 wpa_hexdump(MSG_DEBUG, "FT: sequence number", f_seq, f_seq_len);
1037 msg_both = (const struct ft_rrb_seq *) f_seq;
1038
1039 if (rkh_seq->rx.num_last == 0) {
1040 /* first packet from remote */
1041 goto defer;
1042 }
1043
1044 if (le_to_host32(msg_both->dom) != rkh_seq->rx.dom) {
1045 /* remote might have rebooted */
1046 goto defer;
1047 }
1048
1049 if (os_get_reltime(&now) == 0) {
1050 u32 msg_ts_now_remote, msg_ts_off;
1051 struct os_reltime now_remote;
1052
1053 os_reltime_sub(&now, &rkh_seq->rx.time_offset, &now_remote);
1054 msg_ts_now_remote = now_remote.sec;
1055 msg_ts_off = le_to_host32(msg_both->ts) -
1056 (msg_ts_now_remote - ftRRBseqTimeout);
1057 if (msg_ts_off > 2 * ftRRBseqTimeout)
1058 goto defer;
1059 }
1060
1061 msg_seq = le_to_host32(msg_both->seq);
1062 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1063 msg_off = msg_seq - rkh_off;
1064 if (msg_off > 0xC0000000)
1065 goto out; /* too old message, drop it */
1066
1067 if (msg_off <= 0x40000000) {
1068 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1069 if (rkh_seq->rx.last[i] == msg_seq)
1070 goto out; /* duplicate message, drop it */
1071 }
1072
1073 return FT_RRB_SEQ_OK;
1074 }
1075
1076 defer:
1077 if (no_defer)
1078 goto out;
1079
1080 wpa_printf(MSG_DEBUG, "FT: Possibly invalid sequence number in %s from "
1081 MACSTR, msgtype, MAC2STR(src_addr));
1082
1083 return FT_RRB_SEQ_DEFER;
1084 out:
1085 wpa_printf(MSG_DEBUG, "FT: Invalid sequence number in %s from " MACSTR,
1086 msgtype, MAC2STR(src_addr));
1087
1088 return FT_RRB_SEQ_DROP;
1089 }
1090
1091
1092 static void
wpa_ft_rrb_seq_accept(struct wpa_authenticator * wpa_auth,struct ft_remote_seq * rkh_seq,const u8 * src_addr,const u8 * auth,size_t auth_len,const char * msgtype)1093 wpa_ft_rrb_seq_accept(struct wpa_authenticator *wpa_auth,
1094 struct ft_remote_seq *rkh_seq, const u8 *src_addr,
1095 const u8 *auth, size_t auth_len,
1096 const char *msgtype)
1097 {
1098 const u8 *f_seq;
1099 size_t f_seq_len;
1100 const struct ft_rrb_seq *msg_both;
1101 u32 msg_seq, msg_off, min_off, rkh_off;
1102 int minidx = 0;
1103 unsigned int i;
1104
1105 RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both));
1106 msg_both = (const struct ft_rrb_seq *) f_seq;
1107
1108 msg_seq = le_to_host32(msg_both->seq);
1109
1110 if (rkh_seq->rx.num_last < FT_REMOTE_SEQ_BACKLOG) {
1111 rkh_seq->rx.last[rkh_seq->rx.num_last] = msg_seq;
1112 rkh_seq->rx.num_last++;
1113 return;
1114 }
1115
1116 rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx];
1117 for (i = 0; i < rkh_seq->rx.num_last; i++) {
1118 msg_off = rkh_seq->rx.last[i] - rkh_off;
1119 min_off = rkh_seq->rx.last[minidx] - rkh_off;
1120 if (msg_off < min_off && i != rkh_seq->rx.offsetidx)
1121 minidx = i;
1122 }
1123 rkh_seq->rx.last[rkh_seq->rx.offsetidx] = msg_seq;
1124 rkh_seq->rx.offsetidx = minidx;
1125
1126 return;
1127 out:
1128 /* RRB_GET_AUTH should never fail here as
1129 * wpa_ft_rrb_seq_chk() verified FT_RRB_SEQ presence. */
1130 wpa_printf(MSG_ERROR, "FT: %s() failed", __func__);
1131 }
1132
1133
wpa_ft_new_seq(struct ft_remote_seq * rkh_seq,struct ft_rrb_seq * f_seq)1134 static int wpa_ft_new_seq(struct ft_remote_seq *rkh_seq,
1135 struct ft_rrb_seq *f_seq)
1136 {
1137 struct os_reltime now;
1138
1139 if (os_get_reltime(&now) < 0)
1140 return -1;
1141
1142 if (!rkh_seq->tx.dom) {
1143 if (random_get_bytes((u8 *) &rkh_seq->tx.seq,
1144 sizeof(rkh_seq->tx.seq))) {
1145 wpa_printf(MSG_ERROR,
1146 "FT: Failed to get random data for sequence number initialization");
1147 rkh_seq->tx.seq = now.usec;
1148 }
1149 if (random_get_bytes((u8 *) &rkh_seq->tx.dom,
1150 sizeof(rkh_seq->tx.dom))) {
1151 wpa_printf(MSG_ERROR,
1152 "FT: Failed to get random data for sequence number initialization");
1153 rkh_seq->tx.dom = now.usec;
1154 }
1155 rkh_seq->tx.dom |= 1;
1156 }
1157
1158 f_seq->dom = host_to_le32(rkh_seq->tx.dom);
1159 f_seq->seq = host_to_le32(rkh_seq->tx.seq);
1160 f_seq->ts = host_to_le32(now.sec);
1161
1162 rkh_seq->tx.seq++;
1163
1164 return 0;
1165 }
1166
1167
1168 struct wpa_ft_pmk_r0_sa {
1169 struct dl_list list;
1170 u8 pmk_r0[PMK_LEN_MAX];
1171 size_t pmk_r0_len;
1172 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
1173 u8 spa[ETH_ALEN];
1174 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1175 struct vlan_description *vlan;
1176 os_time_t expiration; /* 0 for no expiration */
1177 u8 *identity;
1178 size_t identity_len;
1179 u8 *radius_cui;
1180 size_t radius_cui_len;
1181 os_time_t session_timeout; /* 0 for no expiration */
1182 /* TODO: radius_class, EAP type */
1183 int pmk_r1_pushed;
1184 };
1185
1186 struct wpa_ft_pmk_r1_sa {
1187 struct dl_list list;
1188 u8 pmk_r1[PMK_LEN_MAX];
1189 size_t pmk_r1_len;
1190 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
1191 u8 spa[ETH_ALEN];
1192 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
1193 struct vlan_description *vlan;
1194 u8 *identity;
1195 size_t identity_len;
1196 u8 *radius_cui;
1197 size_t radius_cui_len;
1198 os_time_t session_timeout; /* 0 for no expiration */
1199 /* TODO: radius_class, EAP type */
1200 };
1201
1202 struct wpa_ft_pmk_cache {
1203 struct dl_list pmk_r0; /* struct wpa_ft_pmk_r0_sa */
1204 struct dl_list pmk_r1; /* struct wpa_ft_pmk_r1_sa */
1205 };
1206
1207
1208 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx);
1209 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx);
1210
1211
wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa * r0)1212 static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0)
1213 {
1214 if (!r0)
1215 return;
1216
1217 dl_list_del(&r0->list);
1218 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1219
1220 os_memset(r0->pmk_r0, 0, PMK_LEN_MAX);
1221 os_free(r0->vlan);
1222 os_free(r0->identity);
1223 os_free(r0->radius_cui);
1224 os_free(r0);
1225 }
1226
1227
wpa_ft_expire_pmk_r0(void * eloop_ctx,void * timeout_ctx)1228 static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx)
1229 {
1230 struct wpa_ft_pmk_r0_sa *r0 = eloop_ctx;
1231 struct os_reltime now;
1232 int expires_in;
1233 int session_timeout;
1234
1235 os_get_reltime(&now);
1236
1237 if (!r0)
1238 return;
1239
1240 expires_in = r0->expiration - now.sec;
1241 session_timeout = r0->session_timeout - now.sec;
1242 /* conditions to remove from cache:
1243 * a) r0->expiration is set and hit
1244 * -or-
1245 * b) r0->session_timeout is set and hit
1246 */
1247 if ((!r0->expiration || expires_in > 0) &&
1248 (!r0->session_timeout || session_timeout > 0)) {
1249 wpa_printf(MSG_ERROR,
1250 "FT: %s() called for non-expired entry %p",
1251 __func__, r0);
1252 eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL);
1253 if (r0->expiration && expires_in > 0)
1254 eloop_register_timeout(expires_in + 1, 0,
1255 wpa_ft_expire_pmk_r0, r0, NULL);
1256 if (r0->session_timeout && session_timeout > 0)
1257 eloop_register_timeout(session_timeout + 1, 0,
1258 wpa_ft_expire_pmk_r0, r0, NULL);
1259 return;
1260 }
1261
1262 wpa_ft_free_pmk_r0(r0);
1263 }
1264
1265
wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa * r1)1266 static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1)
1267 {
1268 if (!r1)
1269 return;
1270
1271 dl_list_del(&r1->list);
1272 eloop_cancel_timeout(wpa_ft_expire_pmk_r1, r1, NULL);
1273
1274 os_memset(r1->pmk_r1, 0, PMK_LEN_MAX);
1275 os_free(r1->vlan);
1276 os_free(r1->identity);
1277 os_free(r1->radius_cui);
1278 os_free(r1);
1279 }
1280
1281
wpa_ft_expire_pmk_r1(void * eloop_ctx,void * timeout_ctx)1282 static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx)
1283 {
1284 struct wpa_ft_pmk_r1_sa *r1 = eloop_ctx;
1285
1286 wpa_ft_free_pmk_r1(r1);
1287 }
1288
1289
wpa_ft_pmk_cache_init(void)1290 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
1291 {
1292 struct wpa_ft_pmk_cache *cache;
1293
1294 cache = os_zalloc(sizeof(*cache));
1295 if (cache) {
1296 dl_list_init(&cache->pmk_r0);
1297 dl_list_init(&cache->pmk_r1);
1298 }
1299
1300 return cache;
1301 }
1302
1303
wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache * cache)1304 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
1305 {
1306 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
1307 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
1308
1309 dl_list_for_each_safe(r0, r0prev, &cache->pmk_r0,
1310 struct wpa_ft_pmk_r0_sa, list)
1311 wpa_ft_free_pmk_r0(r0);
1312
1313 dl_list_for_each_safe(r1, r1prev, &cache->pmk_r1,
1314 struct wpa_ft_pmk_r1_sa, list)
1315 wpa_ft_free_pmk_r1(r1);
1316
1317 os_free(cache);
1318 }
1319
1320
wpa_ft_store_pmk_r0(struct wpa_authenticator * wpa_auth,const u8 * spa,const u8 * pmk_r0,size_t pmk_r0_len,const u8 * pmk_r0_name,int pairwise,const struct vlan_description * vlan,int expires_in,int session_timeout,const u8 * identity,size_t identity_len,const u8 * radius_cui,size_t radius_cui_len)1321 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
1322 const u8 *spa, const u8 *pmk_r0,
1323 size_t pmk_r0_len,
1324 const u8 *pmk_r0_name, int pairwise,
1325 const struct vlan_description *vlan,
1326 int expires_in, int session_timeout,
1327 const u8 *identity, size_t identity_len,
1328 const u8 *radius_cui, size_t radius_cui_len)
1329 {
1330 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1331 struct wpa_ft_pmk_r0_sa *r0;
1332 struct os_reltime now;
1333
1334 /* TODO: add limit on number of entries in cache */
1335 os_get_reltime(&now);
1336
1337 r0 = os_zalloc(sizeof(*r0));
1338 if (r0 == NULL)
1339 return -1;
1340
1341 os_memcpy(r0->pmk_r0, pmk_r0, pmk_r0_len);
1342 r0->pmk_r0_len = pmk_r0_len;
1343 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
1344 os_memcpy(r0->spa, spa, ETH_ALEN);
1345 r0->pairwise = pairwise;
1346 if (expires_in > 0)
1347 r0->expiration = now.sec + expires_in;
1348 if (vlan && vlan->notempty) {
1349 r0->vlan = os_zalloc(sizeof(*vlan));
1350 if (!r0->vlan) {
1351 bin_clear_free(r0, sizeof(*r0));
1352 return -1;
1353 }
1354 *r0->vlan = *vlan;
1355 }
1356 if (identity) {
1357 r0->identity = os_malloc(identity_len);
1358 if (r0->identity) {
1359 os_memcpy(r0->identity, identity, identity_len);
1360 r0->identity_len = identity_len;
1361 }
1362 }
1363 if (radius_cui) {
1364 r0->radius_cui = os_malloc(radius_cui_len);
1365 if (r0->radius_cui) {
1366 os_memcpy(r0->radius_cui, radius_cui, radius_cui_len);
1367 r0->radius_cui_len = radius_cui_len;
1368 }
1369 }
1370 if (session_timeout > 0)
1371 r0->session_timeout = now.sec + session_timeout;
1372
1373 dl_list_add(&cache->pmk_r0, &r0->list);
1374 if (expires_in > 0)
1375 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r0,
1376 r0, NULL);
1377 if (session_timeout > 0)
1378 eloop_register_timeout(session_timeout + 1, 0,
1379 wpa_ft_expire_pmk_r0, r0, NULL);
1380
1381 return 0;
1382 }
1383
1384
wpa_ft_fetch_pmk_r0(struct wpa_authenticator * wpa_auth,const u8 * spa,const u8 * pmk_r0_name,const struct wpa_ft_pmk_r0_sa ** r0_out)1385 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
1386 const u8 *spa, const u8 *pmk_r0_name,
1387 const struct wpa_ft_pmk_r0_sa **r0_out)
1388 {
1389 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1390 struct wpa_ft_pmk_r0_sa *r0;
1391 struct os_reltime now;
1392
1393 os_get_reltime(&now);
1394 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
1395 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
1396 os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
1397 WPA_PMK_NAME_LEN) == 0) {
1398 *r0_out = r0;
1399 return 0;
1400 }
1401 }
1402
1403 *r0_out = NULL;
1404 return -1;
1405 }
1406
1407
wpa_ft_store_pmk_r1(struct wpa_authenticator * wpa_auth,const u8 * spa,const u8 * pmk_r1,size_t pmk_r1_len,const u8 * pmk_r1_name,int pairwise,const struct vlan_description * vlan,int expires_in,int session_timeout,const u8 * identity,size_t identity_len,const u8 * radius_cui,size_t radius_cui_len)1408 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
1409 const u8 *spa, const u8 *pmk_r1,
1410 size_t pmk_r1_len,
1411 const u8 *pmk_r1_name, int pairwise,
1412 const struct vlan_description *vlan,
1413 int expires_in, int session_timeout,
1414 const u8 *identity, size_t identity_len,
1415 const u8 *radius_cui, size_t radius_cui_len)
1416 {
1417 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1418 int max_expires_in = wpa_auth->conf.r1_max_key_lifetime;
1419 struct wpa_ft_pmk_r1_sa *r1;
1420 struct os_reltime now;
1421
1422 /* TODO: limit on number of entries in cache */
1423 os_get_reltime(&now);
1424
1425 if (max_expires_in && (max_expires_in < expires_in || expires_in == 0))
1426 expires_in = max_expires_in;
1427
1428 r1 = os_zalloc(sizeof(*r1));
1429 if (r1 == NULL)
1430 return -1;
1431
1432 os_memcpy(r1->pmk_r1, pmk_r1, pmk_r1_len);
1433 r1->pmk_r1_len = pmk_r1_len;
1434 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
1435 os_memcpy(r1->spa, spa, ETH_ALEN);
1436 r1->pairwise = pairwise;
1437 if (vlan && vlan->notempty) {
1438 r1->vlan = os_zalloc(sizeof(*vlan));
1439 if (!r1->vlan) {
1440 bin_clear_free(r1, sizeof(*r1));
1441 return -1;
1442 }
1443 *r1->vlan = *vlan;
1444 }
1445 if (identity) {
1446 r1->identity = os_malloc(identity_len);
1447 if (r1->identity) {
1448 os_memcpy(r1->identity, identity, identity_len);
1449 r1->identity_len = identity_len;
1450 }
1451 }
1452 if (radius_cui) {
1453 r1->radius_cui = os_malloc(radius_cui_len);
1454 if (r1->radius_cui) {
1455 os_memcpy(r1->radius_cui, radius_cui, radius_cui_len);
1456 r1->radius_cui_len = radius_cui_len;
1457 }
1458 }
1459 if (session_timeout > 0)
1460 r1->session_timeout = now.sec + session_timeout;
1461
1462 dl_list_add(&cache->pmk_r1, &r1->list);
1463
1464 if (expires_in > 0)
1465 eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r1,
1466 r1, NULL);
1467 if (session_timeout > 0)
1468 eloop_register_timeout(session_timeout + 1, 0,
1469 wpa_ft_expire_pmk_r1, r1, NULL);
1470
1471 return 0;
1472 }
1473
1474
wpa_ft_fetch_pmk_r1(struct wpa_authenticator * wpa_auth,const u8 * spa,const u8 * pmk_r1_name,u8 * pmk_r1,size_t * pmk_r1_len,int * pairwise,struct vlan_description * vlan,const u8 ** identity,size_t * identity_len,const u8 ** radius_cui,size_t * radius_cui_len,int * session_timeout)1475 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
1476 const u8 *spa, const u8 *pmk_r1_name,
1477 u8 *pmk_r1, size_t *pmk_r1_len, int *pairwise,
1478 struct vlan_description *vlan,
1479 const u8 **identity, size_t *identity_len,
1480 const u8 **radius_cui, size_t *radius_cui_len,
1481 int *session_timeout)
1482 {
1483 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
1484 struct wpa_ft_pmk_r1_sa *r1;
1485 struct os_reltime now;
1486
1487 os_get_reltime(&now);
1488
1489 dl_list_for_each(r1, &cache->pmk_r1, struct wpa_ft_pmk_r1_sa, list) {
1490 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
1491 os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
1492 WPA_PMK_NAME_LEN) == 0) {
1493 os_memcpy(pmk_r1, r1->pmk_r1, r1->pmk_r1_len);
1494 *pmk_r1_len = r1->pmk_r1_len;
1495 if (pairwise)
1496 *pairwise = r1->pairwise;
1497 if (vlan && r1->vlan)
1498 *vlan = *r1->vlan;
1499 if (vlan && !r1->vlan)
1500 os_memset(vlan, 0, sizeof(*vlan));
1501 if (identity && identity_len) {
1502 *identity = r1->identity;
1503 *identity_len = r1->identity_len;
1504 }
1505 if (radius_cui && radius_cui_len) {
1506 *radius_cui = r1->radius_cui;
1507 *radius_cui_len = r1->radius_cui_len;
1508 }
1509 if (session_timeout && r1->session_timeout > now.sec)
1510 *session_timeout = r1->session_timeout -
1511 now.sec;
1512 else if (session_timeout && r1->session_timeout)
1513 *session_timeout = 1;
1514 else if (session_timeout)
1515 *session_timeout = 0;
1516 return 0;
1517 }
1518 }
1519
1520 return -1;
1521 }
1522
1523
wpa_ft_rrb_init_r0kh_seq(struct ft_remote_r0kh * r0kh)1524 static int wpa_ft_rrb_init_r0kh_seq(struct ft_remote_r0kh *r0kh)
1525 {
1526 if (r0kh->seq)
1527 return 0;
1528
1529 r0kh->seq = os_zalloc(sizeof(*r0kh->seq));
1530 if (!r0kh->seq) {
1531 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r0kh->seq");
1532 return -1;
1533 }
1534
1535 dl_list_init(&r0kh->seq->rx.queue);
1536
1537 return 0;
1538 }
1539
1540
wpa_ft_rrb_lookup_r0kh(struct wpa_authenticator * wpa_auth,const u8 * f_r0kh_id,size_t f_r0kh_id_len,struct ft_remote_r0kh ** r0kh_out,struct ft_remote_r0kh ** r0kh_wildcard)1541 static void wpa_ft_rrb_lookup_r0kh(struct wpa_authenticator *wpa_auth,
1542 const u8 *f_r0kh_id, size_t f_r0kh_id_len,
1543 struct ft_remote_r0kh **r0kh_out,
1544 struct ft_remote_r0kh **r0kh_wildcard)
1545 {
1546 struct ft_remote_r0kh *r0kh;
1547
1548 *r0kh_wildcard = NULL;
1549 *r0kh_out = NULL;
1550
1551 if (wpa_auth->conf.r0kh_list)
1552 r0kh = *wpa_auth->conf.r0kh_list;
1553 else
1554 r0kh = NULL;
1555 for (; r0kh; r0kh = r0kh->next) {
1556 if (r0kh->id_len == 1 && r0kh->id[0] == '*')
1557 *r0kh_wildcard = r0kh;
1558 if (f_r0kh_id && r0kh->id_len == f_r0kh_id_len &&
1559 os_memcmp_const(f_r0kh_id, r0kh->id, f_r0kh_id_len) == 0)
1560 *r0kh_out = r0kh;
1561 }
1562
1563 if (!*r0kh_out && !*r0kh_wildcard)
1564 wpa_printf(MSG_DEBUG, "FT: No matching R0KH found");
1565
1566 if (*r0kh_out && wpa_ft_rrb_init_r0kh_seq(*r0kh_out) < 0)
1567 *r0kh_out = NULL;
1568 }
1569
1570
wpa_ft_rrb_init_r1kh_seq(struct ft_remote_r1kh * r1kh)1571 static int wpa_ft_rrb_init_r1kh_seq(struct ft_remote_r1kh *r1kh)
1572 {
1573 if (r1kh->seq)
1574 return 0;
1575
1576 r1kh->seq = os_zalloc(sizeof(*r1kh->seq));
1577 if (!r1kh->seq) {
1578 wpa_printf(MSG_DEBUG, "FT: Failed to allocate r1kh->seq");
1579 return -1;
1580 }
1581
1582 dl_list_init(&r1kh->seq->rx.queue);
1583
1584 return 0;
1585 }
1586
1587
wpa_ft_rrb_lookup_r1kh(struct wpa_authenticator * wpa_auth,const u8 * f_r1kh_id,struct ft_remote_r1kh ** r1kh_out,struct ft_remote_r1kh ** r1kh_wildcard)1588 static void wpa_ft_rrb_lookup_r1kh(struct wpa_authenticator *wpa_auth,
1589 const u8 *f_r1kh_id,
1590 struct ft_remote_r1kh **r1kh_out,
1591 struct ft_remote_r1kh **r1kh_wildcard)
1592 {
1593 struct ft_remote_r1kh *r1kh;
1594
1595 *r1kh_wildcard = NULL;
1596 *r1kh_out = NULL;
1597
1598 if (wpa_auth->conf.r1kh_list)
1599 r1kh = *wpa_auth->conf.r1kh_list;
1600 else
1601 r1kh = NULL;
1602 for (; r1kh; r1kh = r1kh->next) {
1603 if (is_zero_ether_addr(r1kh->addr) &&
1604 is_zero_ether_addr(r1kh->id))
1605 *r1kh_wildcard = r1kh;
1606 if (f_r1kh_id &&
1607 os_memcmp_const(r1kh->id, f_r1kh_id, FT_R1KH_ID_LEN) == 0)
1608 *r1kh_out = r1kh;
1609 }
1610
1611 if (!*r1kh_out && !*r1kh_wildcard)
1612 wpa_printf(MSG_DEBUG, "FT: No matching R1KH found");
1613
1614 if (*r1kh_out && wpa_ft_rrb_init_r1kh_seq(*r1kh_out) < 0)
1615 *r1kh_out = NULL;
1616 }
1617
1618
wpa_ft_rrb_check_r0kh(struct wpa_authenticator * wpa_auth,const u8 * f_r0kh_id,size_t f_r0kh_id_len)1619 static int wpa_ft_rrb_check_r0kh(struct wpa_authenticator *wpa_auth,
1620 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1621 {
1622 if (f_r0kh_id_len != wpa_auth->conf.r0_key_holder_len ||
1623 os_memcmp_const(f_r0kh_id, wpa_auth->conf.r0_key_holder,
1624 f_r0kh_id_len) != 0)
1625 return -1;
1626
1627 return 0;
1628 }
1629
1630
wpa_ft_rrb_check_r1kh(struct wpa_authenticator * wpa_auth,const u8 * f_r1kh_id)1631 static int wpa_ft_rrb_check_r1kh(struct wpa_authenticator *wpa_auth,
1632 const u8 *f_r1kh_id)
1633 {
1634 if (os_memcmp_const(f_r1kh_id, wpa_auth->conf.r1_key_holder,
1635 FT_R1KH_ID_LEN) != 0)
1636 return -1;
1637
1638 return 0;
1639 }
1640
1641
wpa_ft_rrb_del_r0kh(void * eloop_ctx,void * timeout_ctx)1642 static void wpa_ft_rrb_del_r0kh(void *eloop_ctx, void *timeout_ctx)
1643 {
1644 struct wpa_authenticator *wpa_auth = eloop_ctx;
1645 struct ft_remote_r0kh *r0kh, *prev = NULL;
1646
1647 if (!wpa_auth->conf.r0kh_list)
1648 return;
1649
1650 for (r0kh = *wpa_auth->conf.r0kh_list; r0kh; r0kh = r0kh->next) {
1651 if (r0kh == timeout_ctx)
1652 break;
1653 prev = r0kh;
1654 }
1655 if (!r0kh)
1656 return;
1657 if (prev)
1658 prev->next = r0kh->next;
1659 else
1660 *wpa_auth->conf.r0kh_list = r0kh->next;
1661 if (r0kh->seq)
1662 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1663 os_free(r0kh->seq);
1664 os_free(r0kh);
1665 }
1666
1667
wpa_ft_rrb_r0kh_replenish(struct wpa_authenticator * wpa_auth,struct ft_remote_r0kh * r0kh,int timeout)1668 static void wpa_ft_rrb_r0kh_replenish(struct wpa_authenticator *wpa_auth,
1669 struct ft_remote_r0kh *r0kh, int timeout)
1670 {
1671 if (timeout > 0)
1672 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1673 wpa_auth, r0kh);
1674 }
1675
1676
wpa_ft_rrb_r0kh_timeout(struct wpa_authenticator * wpa_auth,struct ft_remote_r0kh * r0kh,int timeout)1677 static void wpa_ft_rrb_r0kh_timeout(struct wpa_authenticator *wpa_auth,
1678 struct ft_remote_r0kh *r0kh, int timeout)
1679 {
1680 eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth, r0kh);
1681
1682 if (timeout > 0)
1683 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1684 wpa_auth, r0kh);
1685 }
1686
1687
1688 static struct ft_remote_r0kh *
wpa_ft_rrb_add_r0kh(struct wpa_authenticator * wpa_auth,struct ft_remote_r0kh * r0kh_wildcard,const u8 * src_addr,const u8 * r0kh_id,size_t id_len,int timeout)1689 wpa_ft_rrb_add_r0kh(struct wpa_authenticator *wpa_auth,
1690 struct ft_remote_r0kh *r0kh_wildcard,
1691 const u8 *src_addr, const u8 *r0kh_id, size_t id_len,
1692 int timeout)
1693 {
1694 struct ft_remote_r0kh *r0kh;
1695
1696 if (!wpa_auth->conf.r0kh_list)
1697 return NULL;
1698
1699 r0kh = os_zalloc(sizeof(*r0kh));
1700 if (!r0kh)
1701 return NULL;
1702
1703 if (src_addr)
1704 os_memcpy(r0kh->addr, src_addr, sizeof(r0kh->addr));
1705
1706 if (id_len > FT_R0KH_ID_MAX_LEN)
1707 id_len = FT_R0KH_ID_MAX_LEN;
1708 os_memcpy(r0kh->id, r0kh_id, id_len);
1709 r0kh->id_len = id_len;
1710
1711 os_memcpy(r0kh->key, r0kh_wildcard->key, sizeof(r0kh->key));
1712
1713 r0kh->next = *wpa_auth->conf.r0kh_list;
1714 *wpa_auth->conf.r0kh_list = r0kh;
1715
1716 if (timeout > 0)
1717 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh,
1718 wpa_auth, r0kh);
1719
1720 if (wpa_ft_rrb_init_r0kh_seq(r0kh) < 0)
1721 return NULL;
1722
1723 return r0kh;
1724 }
1725
1726
wpa_ft_rrb_del_r1kh(void * eloop_ctx,void * timeout_ctx)1727 static void wpa_ft_rrb_del_r1kh(void *eloop_ctx, void *timeout_ctx)
1728 {
1729 struct wpa_authenticator *wpa_auth = eloop_ctx;
1730 struct ft_remote_r1kh *r1kh, *prev = NULL;
1731
1732 if (!wpa_auth->conf.r1kh_list)
1733 return;
1734
1735 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
1736 if (r1kh == timeout_ctx)
1737 break;
1738 prev = r1kh;
1739 }
1740 if (!r1kh)
1741 return;
1742 if (prev)
1743 prev->next = r1kh->next;
1744 else
1745 *wpa_auth->conf.r1kh_list = r1kh->next;
1746 if (r1kh->seq)
1747 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1748 os_free(r1kh->seq);
1749 os_free(r1kh);
1750 }
1751
1752
wpa_ft_rrb_r1kh_replenish(struct wpa_authenticator * wpa_auth,struct ft_remote_r1kh * r1kh,int timeout)1753 static void wpa_ft_rrb_r1kh_replenish(struct wpa_authenticator *wpa_auth,
1754 struct ft_remote_r1kh *r1kh, int timeout)
1755 {
1756 if (timeout > 0)
1757 eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1758 wpa_auth, r1kh);
1759 }
1760
1761
1762 static struct ft_remote_r1kh *
wpa_ft_rrb_add_r1kh(struct wpa_authenticator * wpa_auth,struct ft_remote_r1kh * r1kh_wildcard,const u8 * src_addr,const u8 * r1kh_id,int timeout)1763 wpa_ft_rrb_add_r1kh(struct wpa_authenticator *wpa_auth,
1764 struct ft_remote_r1kh *r1kh_wildcard,
1765 const u8 *src_addr, const u8 *r1kh_id, int timeout)
1766 {
1767 struct ft_remote_r1kh *r1kh;
1768
1769 if (!wpa_auth->conf.r1kh_list)
1770 return NULL;
1771
1772 r1kh = os_zalloc(sizeof(*r1kh));
1773 if (!r1kh)
1774 return NULL;
1775
1776 os_memcpy(r1kh->addr, src_addr, sizeof(r1kh->addr));
1777 os_memcpy(r1kh->id, r1kh_id, sizeof(r1kh->id));
1778 os_memcpy(r1kh->key, r1kh_wildcard->key, sizeof(r1kh->key));
1779 r1kh->next = *wpa_auth->conf.r1kh_list;
1780 *wpa_auth->conf.r1kh_list = r1kh;
1781
1782 if (timeout > 0)
1783 eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r1kh,
1784 wpa_auth, r1kh);
1785
1786 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
1787 return NULL;
1788
1789 return r1kh;
1790 }
1791
1792
wpa_ft_sta_deinit(struct wpa_state_machine * sm)1793 void wpa_ft_sta_deinit(struct wpa_state_machine *sm)
1794 {
1795 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1796 }
1797
1798
wpa_ft_deinit_seq(struct wpa_authenticator * wpa_auth)1799 static void wpa_ft_deinit_seq(struct wpa_authenticator *wpa_auth)
1800 {
1801 struct ft_remote_r0kh *r0kh;
1802 struct ft_remote_r1kh *r1kh;
1803
1804 eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, wpa_auth, ELOOP_ALL_CTX);
1805
1806 if (wpa_auth->conf.r0kh_list)
1807 r0kh = *wpa_auth->conf.r0kh_list;
1808 else
1809 r0kh = NULL;
1810 for (; r0kh; r0kh = r0kh->next) {
1811 if (!r0kh->seq)
1812 continue;
1813 wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0);
1814 os_free(r0kh->seq);
1815 r0kh->seq = NULL;
1816 }
1817
1818 if (wpa_auth->conf.r1kh_list)
1819 r1kh = *wpa_auth->conf.r1kh_list;
1820 else
1821 r1kh = NULL;
1822 for (; r1kh; r1kh = r1kh->next) {
1823 if (!r1kh->seq)
1824 continue;
1825 wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0);
1826 os_free(r1kh->seq);
1827 r1kh->seq = NULL;
1828 }
1829 }
1830
1831
wpa_ft_deinit_rkh_tmp(struct wpa_authenticator * wpa_auth)1832 static void wpa_ft_deinit_rkh_tmp(struct wpa_authenticator *wpa_auth)
1833 {
1834 struct ft_remote_r0kh *r0kh, *r0kh_next, *r0kh_prev = NULL;
1835 struct ft_remote_r1kh *r1kh, *r1kh_next, *r1kh_prev = NULL;
1836
1837 if (wpa_auth->conf.r0kh_list)
1838 r0kh = *wpa_auth->conf.r0kh_list;
1839 else
1840 r0kh = NULL;
1841 while (r0kh) {
1842 r0kh_next = r0kh->next;
1843 if (eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth,
1844 r0kh) > 0) {
1845 if (r0kh_prev)
1846 r0kh_prev->next = r0kh_next;
1847 else
1848 *wpa_auth->conf.r0kh_list = r0kh_next;
1849 os_free(r0kh);
1850 } else {
1851 r0kh_prev = r0kh;
1852 }
1853 r0kh = r0kh_next;
1854 }
1855
1856 if (wpa_auth->conf.r1kh_list)
1857 r1kh = *wpa_auth->conf.r1kh_list;
1858 else
1859 r1kh = NULL;
1860 while (r1kh) {
1861 r1kh_next = r1kh->next;
1862 if (eloop_cancel_timeout(wpa_ft_rrb_del_r1kh, wpa_auth,
1863 r1kh) > 0) {
1864 if (r1kh_prev)
1865 r1kh_prev->next = r1kh_next;
1866 else
1867 *wpa_auth->conf.r1kh_list = r1kh_next;
1868 os_free(r1kh);
1869 } else {
1870 r1kh_prev = r1kh;
1871 }
1872 r1kh = r1kh_next;
1873 }
1874 }
1875
1876
wpa_ft_deinit(struct wpa_authenticator * wpa_auth)1877 void wpa_ft_deinit(struct wpa_authenticator *wpa_auth)
1878 {
1879 wpa_ft_deinit_seq(wpa_auth);
1880 wpa_ft_deinit_rkh_tmp(wpa_auth);
1881 }
1882
1883
wpa_ft_block_r0kh(struct wpa_authenticator * wpa_auth,const u8 * f_r0kh_id,size_t f_r0kh_id_len)1884 static void wpa_ft_block_r0kh(struct wpa_authenticator *wpa_auth,
1885 const u8 *f_r0kh_id, size_t f_r0kh_id_len)
1886 {
1887 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1888
1889 if (!wpa_auth->conf.rkh_neg_timeout)
1890 return;
1891
1892 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
1893 &r0kh, &r0kh_wildcard);
1894
1895 if (!r0kh_wildcard) {
1896 /* r0kh removed after neg_timeout and might need re-adding */
1897 return;
1898 }
1899
1900 wpa_hexdump(MSG_DEBUG, "FT: Blacklist R0KH-ID",
1901 f_r0kh_id, f_r0kh_id_len);
1902
1903 if (r0kh) {
1904 wpa_ft_rrb_r0kh_timeout(wpa_auth, r0kh,
1905 wpa_auth->conf.rkh_neg_timeout);
1906 os_memset(r0kh->addr, 0, ETH_ALEN);
1907 } else
1908 wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, NULL, f_r0kh_id,
1909 f_r0kh_id_len,
1910 wpa_auth->conf.rkh_neg_timeout);
1911 }
1912
1913
wpa_ft_expire_pull(void * eloop_ctx,void * timeout_ctx)1914 static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx)
1915 {
1916 struct wpa_state_machine *sm = eloop_ctx;
1917
1918 wpa_printf(MSG_DEBUG, "FT: Timeout pending pull request for " MACSTR,
1919 MAC2STR(sm->addr));
1920 if (sm->ft_pending_pull_left_retries <= 0)
1921 wpa_ft_block_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len);
1922
1923 /* cancel multiple timeouts */
1924 eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL);
1925 ft_finish_pull(sm);
1926 }
1927
1928
wpa_ft_pull_pmk_r1(struct wpa_state_machine * sm,const u8 * ies,size_t ies_len,const u8 * pmk_r0_name)1929 static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
1930 const u8 *ies, size_t ies_len,
1931 const u8 *pmk_r0_name)
1932 {
1933 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
1934 u8 *packet = NULL;
1935 const u8 *key, *f_r1kh_id = sm->wpa_auth->conf.r1_key_holder;
1936 size_t packet_len, key_len;
1937 struct ft_rrb_seq f_seq;
1938 int tsecs, tusecs, first;
1939 struct wpabuf *ft_pending_req_ies;
1940 int r0kh_timeout;
1941 struct tlv_list req_enc[] = {
1942 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
1943 .data = pmk_r0_name },
1944 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
1945 .data = sm->addr },
1946 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1947 };
1948 struct tlv_list req_auth[] = {
1949 { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN,
1950 .data = sm->ft_pending_pull_nonce },
1951 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
1952 .data = (u8 *) &f_seq },
1953 { .type = FT_RRB_R0KH_ID, .len = sm->r0kh_id_len,
1954 .data = sm->r0kh_id },
1955 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
1956 .data = f_r1kh_id },
1957 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
1958 };
1959
1960 if (sm->ft_pending_pull_left_retries <= 0)
1961 return -1;
1962 first = sm->ft_pending_pull_left_retries ==
1963 sm->wpa_auth->conf.rkh_pull_retries;
1964 sm->ft_pending_pull_left_retries--;
1965
1966 wpa_ft_rrb_lookup_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len,
1967 &r0kh, &r0kh_wildcard);
1968
1969 /* Keep r0kh sufficiently long in the list for seq num check */
1970 r0kh_timeout = sm->wpa_auth->conf.rkh_pull_timeout / 1000 +
1971 1 + ftRRBseqTimeout;
1972 if (r0kh) {
1973 wpa_ft_rrb_r0kh_replenish(sm->wpa_auth, r0kh, r0kh_timeout);
1974 } else if (r0kh_wildcard) {
1975 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
1976 /* r0kh->addr: updated by SEQ_RESP and wpa_ft_expire_pull */
1977 r0kh = wpa_ft_rrb_add_r0kh(sm->wpa_auth, r0kh_wildcard,
1978 r0kh_wildcard->addr,
1979 sm->r0kh_id, sm->r0kh_id_len,
1980 r0kh_timeout);
1981 }
1982 if (r0kh == NULL) {
1983 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
1984 sm->r0kh_id, sm->r0kh_id_len);
1985 return -1;
1986 }
1987 if (is_zero_ether_addr(r0kh->addr)) {
1988 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID is blacklisted",
1989 sm->r0kh_id, sm->r0kh_id_len);
1990 return -1;
1991 }
1992 if (os_memcmp(r0kh->addr, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1993 wpa_printf(MSG_DEBUG,
1994 "FT: R0KH-ID points to self - no matching key available");
1995 return -1;
1996 }
1997
1998 key = r0kh->key;
1999 key_len = sizeof(r0kh->key);
2000
2001 if (r0kh->seq->rx.num_last == 0) {
2002 /* A sequence request will be sent out anyway when pull
2003 * response is received. Send it out now to avoid one RTT. */
2004 wpa_ft_rrb_seq_req(sm->wpa_auth, r0kh->seq, r0kh->addr,
2005 r0kh->id, r0kh->id_len, f_r1kh_id, key,
2006 key_len, NULL, 0, NULL, 0, NULL);
2007 }
2008
2009 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request from " MACSTR
2010 " to remote R0KH address " MACSTR,
2011 MAC2STR(sm->wpa_auth->addr), MAC2STR(r0kh->addr));
2012
2013 if (first &&
2014 random_get_bytes(sm->ft_pending_pull_nonce, FT_RRB_NONCE_LEN) < 0) {
2015 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
2016 "nonce");
2017 return -1;
2018 }
2019
2020 if (wpa_ft_new_seq(r0kh->seq, &f_seq) < 0) {
2021 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
2022 return -1;
2023 }
2024
2025 if (wpa_ft_rrb_build(key, key_len, req_enc, NULL, req_auth, NULL,
2026 sm->wpa_auth->addr, FT_PACKET_R0KH_R1KH_PULL,
2027 &packet, &packet_len) < 0)
2028 return -1;
2029
2030 ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
2031 wpabuf_free(sm->ft_pending_req_ies);
2032 sm->ft_pending_req_ies = ft_pending_req_ies;
2033 if (!sm->ft_pending_req_ies) {
2034 os_free(packet);
2035 return -1;
2036 }
2037
2038 tsecs = sm->wpa_auth->conf.rkh_pull_timeout / 1000;
2039 tusecs = (sm->wpa_auth->conf.rkh_pull_timeout % 1000) * 1000;
2040 eloop_register_timeout(tsecs, tusecs, wpa_ft_expire_pull, sm, NULL);
2041
2042 wpa_ft_rrb_oui_send(sm->wpa_auth, r0kh->addr, FT_PACKET_R0KH_R1KH_PULL,
2043 packet, packet_len);
2044
2045 os_free(packet);
2046
2047 return 0;
2048 }
2049
2050
wpa_ft_store_pmk_fils(struct wpa_state_machine * sm,const u8 * pmk_r0,const u8 * pmk_r0_name)2051 int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm,
2052 const u8 *pmk_r0, const u8 *pmk_r0_name)
2053 {
2054 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2055 struct vlan_description vlan;
2056 const u8 *identity, *radius_cui;
2057 size_t identity_len, radius_cui_len;
2058 int session_timeout;
2059 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2060 SHA384_MAC_LEN : PMK_LEN;
2061
2062 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2063 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2064 MAC2STR(sm->addr));
2065 return -1;
2066 }
2067
2068 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2069 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2070 &radius_cui);
2071 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2072
2073 return wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2074 pmk_r0_name, sm->pairwise, &vlan, expires_in,
2075 session_timeout, identity, identity_len,
2076 radius_cui, radius_cui_len);
2077 }
2078
2079
wpa_auth_derive_ptk_ft(struct wpa_state_machine * sm,struct wpa_ptk * ptk)2080 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, struct wpa_ptk *ptk)
2081 {
2082 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2083 size_t pmk_r0_len = wpa_key_mgmt_sha384(sm->wpa_key_mgmt) ?
2084 SHA384_MAC_LEN : PMK_LEN;
2085 size_t pmk_r1_len = pmk_r0_len;
2086 u8 pmk_r1[PMK_LEN_MAX];
2087 u8 ptk_name[WPA_PMK_NAME_LEN];
2088 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
2089 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
2090 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
2091 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
2092 const u8 *ssid = sm->wpa_auth->conf.ssid;
2093 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
2094 int psk_local = sm->wpa_auth->conf.ft_psk_generate_local;
2095 int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
2096 struct vlan_description vlan;
2097 const u8 *identity, *radius_cui;
2098 size_t identity_len, radius_cui_len;
2099 int session_timeout;
2100 const u8 *mpmk;
2101 size_t mpmk_len;
2102
2103 if (sm->xxkey_len > 0) {
2104 mpmk = sm->xxkey;
2105 mpmk_len = sm->xxkey_len;
2106 } else if (sm->pmksa) {
2107 mpmk = sm->pmksa->pmk;
2108 mpmk_len = sm->pmksa->pmk_len;
2109 } else {
2110 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
2111 "derivation");
2112 return -1;
2113 }
2114
2115 if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
2116 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
2117 MAC2STR(sm->addr));
2118 return -1;
2119 }
2120
2121 identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
2122 radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
2123 &radius_cui);
2124 session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr);
2125
2126 if (wpa_derive_pmk_r0(mpmk, mpmk_len, ssid, ssid_len, mdid,
2127 r0kh, r0kh_len, sm->addr,
2128 pmk_r0, pmk_r0_name,
2129 wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) < 0)
2130 return -1;
2131 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
2132 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
2133 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2134 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len,
2135 pmk_r0_name,
2136 sm->pairwise, &vlan, expires_in,
2137 session_timeout, identity, identity_len,
2138 radius_cui, radius_cui_len);
2139
2140 if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_len, pmk_r0_name, r1kh, sm->addr,
2141 pmk_r1, sm->pmk_r1_name) < 0)
2142 return -1;
2143 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
2144 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
2145 WPA_PMK_NAME_LEN);
2146 if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
2147 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_len,
2148 sm->pmk_r1_name, sm->pairwise, &vlan,
2149 expires_in, session_timeout, identity,
2150 identity_len, radius_cui, radius_cui_len);
2151
2152 return wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
2153 sm->addr, sm->wpa_auth->addr, sm->pmk_r1_name,
2154 ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
2155 }
2156
2157
wpa_auth_get_seqnum(struct wpa_authenticator * wpa_auth,const u8 * addr,int idx,u8 * seq)2158 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
2159 const u8 *addr, int idx, u8 *seq)
2160 {
2161 if (wpa_auth->cb->get_seqnum == NULL)
2162 return -1;
2163 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
2164 }
2165
2166
wpa_ft_gtk_subelem(struct wpa_state_machine * sm,size_t * len)2167 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
2168 {
2169 u8 *subelem;
2170 struct wpa_group *gsm = sm->group;
2171 size_t subelem_len, pad_len;
2172 const u8 *key;
2173 size_t key_len;
2174 u8 keybuf[32];
2175 const u8 *kek;
2176 size_t kek_len;
2177
2178 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2179 kek = sm->PTK.kek2;
2180 kek_len = sm->PTK.kek2_len;
2181 } else {
2182 kek = sm->PTK.kek;
2183 kek_len = sm->PTK.kek_len;
2184 }
2185
2186 key_len = gsm->GTK_len;
2187 if (key_len > sizeof(keybuf))
2188 return NULL;
2189
2190 /*
2191 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
2192 * than 16 bytes.
2193 */
2194 pad_len = key_len % 8;
2195 if (pad_len)
2196 pad_len = 8 - pad_len;
2197 if (key_len + pad_len < 16)
2198 pad_len += 8;
2199 if (pad_len && key_len < sizeof(keybuf)) {
2200 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
2201 os_memset(keybuf + key_len, 0, pad_len);
2202 keybuf[key_len] = 0xdd;
2203 key_len += pad_len;
2204 key = keybuf;
2205 } else
2206 key = gsm->GTK[gsm->GN - 1];
2207
2208 /*
2209 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2210 * Key[5..32].
2211 */
2212 subelem_len = 13 + key_len + 8;
2213 subelem = os_zalloc(subelem_len);
2214 if (subelem == NULL)
2215 return NULL;
2216
2217 subelem[0] = FTIE_SUBELEM_GTK;
2218 subelem[1] = 11 + key_len + 8;
2219 /* Key ID in B0-B1 of Key Info */
2220 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
2221 subelem[4] = gsm->GTK_len;
2222 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
2223 if (aes_wrap(kek, kek_len, key_len / 8, key, subelem + 13)) {
2224 wpa_printf(MSG_DEBUG,
2225 "FT: GTK subelem encryption failed: kek_len=%d",
2226 (int) kek_len);
2227 os_free(subelem);
2228 return NULL;
2229 }
2230
2231 forced_memzero(keybuf, sizeof(keybuf));
2232 *len = subelem_len;
2233 return subelem;
2234 }
2235
2236
wpa_ft_igtk_subelem(struct wpa_state_machine * sm,size_t * len)2237 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
2238 {
2239 u8 *subelem, *pos;
2240 struct wpa_group *gsm = sm->group;
2241 size_t subelem_len;
2242 const u8 *kek;
2243 size_t kek_len;
2244 size_t igtk_len;
2245
2246 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2247 kek = sm->PTK.kek2;
2248 kek_len = sm->PTK.kek2_len;
2249 } else {
2250 kek = sm->PTK.kek;
2251 kek_len = sm->PTK.kek_len;
2252 }
2253
2254 igtk_len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2255
2256 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
2257 * Key[16+8] */
2258 subelem_len = 1 + 1 + 2 + 6 + 1 + igtk_len + 8;
2259 subelem = os_zalloc(subelem_len);
2260 if (subelem == NULL)
2261 return NULL;
2262
2263 pos = subelem;
2264 *pos++ = FTIE_SUBELEM_IGTK;
2265 *pos++ = subelem_len - 2;
2266 WPA_PUT_LE16(pos, gsm->GN_igtk);
2267 pos += 2;
2268 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
2269 pos += 6;
2270 *pos++ = igtk_len;
2271 if (aes_wrap(kek, kek_len, igtk_len / 8,
2272 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
2273 wpa_printf(MSG_DEBUG,
2274 "FT: IGTK subelem encryption failed: kek_len=%d",
2275 (int) kek_len);
2276 os_free(subelem);
2277 return NULL;
2278 }
2279
2280 *len = subelem_len;
2281 return subelem;
2282 }
2283
2284
wpa_ft_bigtk_subelem(struct wpa_state_machine * sm,size_t * len)2285 static u8 * wpa_ft_bigtk_subelem(struct wpa_state_machine *sm, size_t *len)
2286 {
2287 u8 *subelem, *pos;
2288 struct wpa_group *gsm = sm->group;
2289 size_t subelem_len;
2290 const u8 *kek;
2291 size_t kek_len;
2292 size_t bigtk_len;
2293
2294 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2295 kek = sm->PTK.kek2;
2296 kek_len = sm->PTK.kek2_len;
2297 } else {
2298 kek = sm->PTK.kek;
2299 kek_len = sm->PTK.kek_len;
2300 }
2301
2302 bigtk_len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2303
2304 /* Sub-elem ID[1] | Length[1] | KeyID[2] | BIPN[6] | Key Length[1] |
2305 * Key[16+8] */
2306 subelem_len = 1 + 1 + 2 + 6 + 1 + bigtk_len + 8;
2307 subelem = os_zalloc(subelem_len);
2308 if (subelem == NULL)
2309 return NULL;
2310
2311 pos = subelem;
2312 *pos++ = FTIE_SUBELEM_BIGTK;
2313 *pos++ = subelem_len - 2;
2314 WPA_PUT_LE16(pos, gsm->GN_bigtk);
2315 pos += 2;
2316 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_bigtk, pos);
2317 pos += 6;
2318 *pos++ = bigtk_len;
2319 if (aes_wrap(kek, kek_len, bigtk_len / 8,
2320 gsm->IGTK[gsm->GN_bigtk - 6], pos)) {
2321 wpa_printf(MSG_DEBUG,
2322 "FT: BIGTK subelem encryption failed: kek_len=%d",
2323 (int) kek_len);
2324 os_free(subelem);
2325 return NULL;
2326 }
2327
2328 *len = subelem_len;
2329 return subelem;
2330 }
2331
2332
wpa_ft_process_rdie(struct wpa_state_machine * sm,u8 * pos,u8 * end,u8 id,u8 descr_count,const u8 * ies,size_t ies_len)2333 static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
2334 u8 *pos, u8 *end, u8 id, u8 descr_count,
2335 const u8 *ies, size_t ies_len)
2336 {
2337 struct ieee802_11_elems parse;
2338 struct rsn_rdie *rdie;
2339
2340 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
2341 id, descr_count);
2342 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
2343 ies, ies_len);
2344
2345 if (end - pos < (int) sizeof(*rdie)) {
2346 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
2347 return pos;
2348 }
2349
2350 *pos++ = WLAN_EID_RIC_DATA;
2351 *pos++ = sizeof(*rdie);
2352 rdie = (struct rsn_rdie *) pos;
2353 rdie->id = id;
2354 rdie->descr_count = 0;
2355 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
2356 pos += sizeof(*rdie);
2357
2358 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
2359 ParseFailed) {
2360 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
2361 rdie->status_code =
2362 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2363 return pos;
2364 }
2365
2366 if (parse.wmm_tspec) {
2367 struct wmm_tspec_element *tspec;
2368
2369 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
2370 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
2371 "(%d)", (int) parse.wmm_tspec_len);
2372 rdie->status_code =
2373 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2374 return pos;
2375 }
2376 if (end - pos < (int) sizeof(*tspec)) {
2377 wpa_printf(MSG_ERROR, "FT: Not enough room for "
2378 "response TSPEC");
2379 rdie->status_code =
2380 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2381 return pos;
2382 }
2383 tspec = (struct wmm_tspec_element *) pos;
2384 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
2385 }
2386
2387 #ifdef NEED_AP_MLME
2388 if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
2389 int res;
2390
2391 res = wmm_process_tspec((struct wmm_tspec_element *) pos);
2392 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
2393 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
2394 rdie->status_code =
2395 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
2396 else if (res == WMM_ADDTS_STATUS_REFUSED)
2397 rdie->status_code =
2398 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
2399 else {
2400 /* TSPEC accepted; include updated TSPEC in response */
2401 rdie->descr_count = 1;
2402 pos += sizeof(struct wmm_tspec_element);
2403 }
2404 return pos;
2405 }
2406 #endif /* NEED_AP_MLME */
2407
2408 if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
2409 int res;
2410
2411 res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
2412 sizeof(struct wmm_tspec_element));
2413 if (res >= 0) {
2414 if (res)
2415 rdie->status_code = host_to_le16(res);
2416 else {
2417 /* TSPEC accepted; include updated TSPEC in
2418 * response */
2419 rdie->descr_count = 1;
2420 pos += sizeof(struct wmm_tspec_element);
2421 }
2422 return pos;
2423 }
2424 }
2425
2426 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
2427 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
2428 return pos;
2429 }
2430
2431
wpa_ft_process_ric(struct wpa_state_machine * sm,u8 * pos,u8 * end,const u8 * ric,size_t ric_len)2432 static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
2433 const u8 *ric, size_t ric_len)
2434 {
2435 const u8 *rpos, *start;
2436 const struct rsn_rdie *rdie;
2437
2438 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
2439
2440 rpos = ric;
2441 while (rpos + sizeof(*rdie) < ric + ric_len) {
2442 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
2443 rpos + 2 + rpos[1] > ric + ric_len)
2444 break;
2445 rdie = (const struct rsn_rdie *) (rpos + 2);
2446 rpos += 2 + rpos[1];
2447 start = rpos;
2448
2449 while (rpos + 2 <= ric + ric_len &&
2450 rpos + 2 + rpos[1] <= ric + ric_len) {
2451 if (rpos[0] == WLAN_EID_RIC_DATA)
2452 break;
2453 rpos += 2 + rpos[1];
2454 }
2455 pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
2456 rdie->descr_count,
2457 start, rpos - start);
2458 }
2459
2460 return pos;
2461 }
2462
2463
wpa_sm_write_assoc_resp_ies(struct wpa_state_machine * sm,u8 * pos,size_t max_len,int auth_alg,const u8 * req_ies,size_t req_ies_len,int omit_rsnxe)2464 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
2465 size_t max_len, int auth_alg,
2466 const u8 *req_ies, size_t req_ies_len,
2467 int omit_rsnxe)
2468 {
2469 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
2470 u8 *fte_mic, *elem_count;
2471 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
2472 u8 rsnxe_buf[10], *rsnxe = rsnxe_buf;
2473 size_t rsnxe_len;
2474 int rsnxe_used;
2475 int res;
2476 struct wpa_auth_config *conf;
2477 struct wpa_ft_ies parse;
2478 u8 *ric_start;
2479 u8 *anonce, *snonce;
2480 const u8 *kck;
2481 size_t kck_len;
2482 int use_sha384;
2483
2484 if (sm == NULL)
2485 return pos;
2486
2487 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2488 conf = &sm->wpa_auth->conf;
2489
2490 if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
2491 return pos;
2492
2493 end = pos + max_len;
2494
2495 #ifdef CONFIG_TESTING_OPTIONS
2496 if (auth_alg == WLAN_AUTH_FT &&
2497 sm->wpa_auth->conf.rsne_override_ft_set) {
2498 wpa_printf(MSG_DEBUG,
2499 "TESTING: RSNE FT override for MIC calculation");
2500 rsnie = sm->wpa_auth->conf.rsne_override_ft;
2501 rsnie_len = sm->wpa_auth->conf.rsne_override_ft_len;
2502 if (end - pos < (long int) rsnie_len)
2503 return pos;
2504 os_memcpy(pos, rsnie, rsnie_len);
2505 rsnie = pos;
2506 pos += rsnie_len;
2507 if (rsnie_len > PMKID_LEN && sm->pmk_r1_name_valid) {
2508 int idx;
2509
2510 /* Replace all 0xff PMKID with the valid PMKR1Name */
2511 for (idx = 0; idx < PMKID_LEN; idx++) {
2512 if (rsnie[rsnie_len - 1 - idx] != 0xff)
2513 break;
2514 }
2515 if (idx == PMKID_LEN)
2516 os_memcpy(&rsnie[rsnie_len - PMKID_LEN],
2517 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2518 }
2519 } else
2520 #endif /* CONFIG_TESTING_OPTIONS */
2521 if (auth_alg == WLAN_AUTH_FT ||
2522 ((auth_alg == WLAN_AUTH_FILS_SK ||
2523 auth_alg == WLAN_AUTH_FILS_SK_PFS ||
2524 auth_alg == WLAN_AUTH_FILS_PK) &&
2525 (sm->wpa_key_mgmt & (WPA_KEY_MGMT_FT_FILS_SHA256 |
2526 WPA_KEY_MGMT_FT_FILS_SHA384)))) {
2527 if (!sm->pmk_r1_name_valid) {
2528 wpa_printf(MSG_ERROR,
2529 "FT: PMKR1Name is not valid for Assoc Resp RSNE");
2530 return NULL;
2531 }
2532 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name for Assoc Resp RSNE",
2533 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2534 /*
2535 * RSN (only present if this is a Reassociation Response and
2536 * part of a fast BSS transition; or if this is a
2537 * (Re)Association Response frame during an FT initial mobility
2538 * domain association using FILS)
2539 */
2540 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
2541 if (res < 0)
2542 return NULL;
2543 rsnie = pos;
2544 rsnie_len = res;
2545 pos += res;
2546 }
2547
2548 /* Mobility Domain Information */
2549 res = wpa_write_mdie(conf, pos, end - pos);
2550 if (res < 0)
2551 return NULL;
2552 mdie = pos;
2553 mdie_len = res;
2554 pos += res;
2555
2556 /* Fast BSS Transition Information */
2557 if (auth_alg == WLAN_AUTH_FT) {
2558 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
2559 if (!subelem) {
2560 wpa_printf(MSG_DEBUG,
2561 "FT: Failed to add GTK subelement");
2562 return NULL;
2563 }
2564 r0kh_id = sm->r0kh_id;
2565 r0kh_id_len = sm->r0kh_id_len;
2566 anonce = sm->ANonce;
2567 snonce = sm->SNonce;
2568 if (sm->mgmt_frame_prot) {
2569 u8 *igtk;
2570 size_t igtk_len;
2571 u8 *nbuf;
2572 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
2573 if (igtk == NULL) {
2574 wpa_printf(MSG_DEBUG,
2575 "FT: Failed to add IGTK subelement");
2576 os_free(subelem);
2577 return NULL;
2578 }
2579 nbuf = os_realloc(subelem, subelem_len + igtk_len);
2580 if (nbuf == NULL) {
2581 os_free(subelem);
2582 os_free(igtk);
2583 return NULL;
2584 }
2585 subelem = nbuf;
2586 os_memcpy(subelem + subelem_len, igtk, igtk_len);
2587 subelem_len += igtk_len;
2588 os_free(igtk);
2589 }
2590 if (sm->mgmt_frame_prot && conf->beacon_prot) {
2591 u8 *bigtk;
2592 size_t bigtk_len;
2593 u8 *nbuf;
2594
2595 bigtk = wpa_ft_bigtk_subelem(sm, &bigtk_len);
2596 if (!bigtk) {
2597 wpa_printf(MSG_DEBUG,
2598 "FT: Failed to add BIGTK subelement");
2599 os_free(subelem);
2600 return NULL;
2601 }
2602 nbuf = os_realloc(subelem, subelem_len + bigtk_len);
2603 if (!nbuf) {
2604 os_free(subelem);
2605 os_free(bigtk);
2606 return NULL;
2607 }
2608 subelem = nbuf;
2609 os_memcpy(subelem + subelem_len, bigtk, bigtk_len);
2610 subelem_len += bigtk_len;
2611 os_free(bigtk);
2612 }
2613 #ifdef CONFIG_OCV
2614 if (wpa_auth_uses_ocv(sm)) {
2615 struct wpa_channel_info ci;
2616 u8 *nbuf, *ocipos;
2617
2618 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2619 wpa_printf(MSG_WARNING,
2620 "Failed to get channel info for OCI element");
2621 os_free(subelem);
2622 return NULL;
2623 }
2624
2625 subelem_len += 2 + OCV_OCI_LEN;
2626 nbuf = os_realloc(subelem, subelem_len);
2627 if (!nbuf) {
2628 os_free(subelem);
2629 return NULL;
2630 }
2631 subelem = nbuf;
2632
2633 ocipos = subelem + subelem_len - 2 - OCV_OCI_LEN;
2634 *ocipos++ = FTIE_SUBELEM_OCI;
2635 *ocipos++ = OCV_OCI_LEN;
2636 if (ocv_insert_oci(&ci, &ocipos) < 0) {
2637 os_free(subelem);
2638 return NULL;
2639 }
2640 }
2641 #endif /* CONFIG_OCV */
2642 } else {
2643 r0kh_id = conf->r0_key_holder;
2644 r0kh_id_len = conf->r0_key_holder_len;
2645 anonce = NULL;
2646 snonce = NULL;
2647 }
2648 rsnxe_used = (auth_alg == WLAN_AUTH_FT) &&
2649 (conf->sae_pwe == 1 || conf->sae_pwe == 2);
2650 #ifdef CONFIG_TESTING_OPTIONS
2651 if (sm->wpa_auth->conf.ft_rsnxe_used) {
2652 rsnxe_used = sm->wpa_auth->conf.ft_rsnxe_used == 1;
2653 wpa_printf(MSG_DEBUG, "TESTING: FT: Force RSNXE Used %d",
2654 rsnxe_used);
2655 }
2656 #endif /* CONFIG_TESTING_OPTIONS */
2657 res = wpa_write_ftie(conf, use_sha384, r0kh_id, r0kh_id_len,
2658 anonce, snonce, pos, end - pos,
2659 subelem, subelem_len, rsnxe_used);
2660 os_free(subelem);
2661 if (res < 0)
2662 return NULL;
2663 ftie = pos;
2664 ftie_len = res;
2665 pos += res;
2666
2667 if (use_sha384) {
2668 struct rsn_ftie_sha384 *_ftie =
2669 (struct rsn_ftie_sha384 *) (ftie + 2);
2670
2671 fte_mic = _ftie->mic;
2672 elem_count = &_ftie->mic_control[1];
2673 } else {
2674 struct rsn_ftie *_ftie = (struct rsn_ftie *) (ftie + 2);
2675
2676 fte_mic = _ftie->mic;
2677 elem_count = &_ftie->mic_control[1];
2678 }
2679 if (auth_alg == WLAN_AUTH_FT)
2680 *elem_count = 3; /* Information element count */
2681
2682 ric_start = pos;
2683 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse, use_sha384) == 0
2684 && parse.ric) {
2685 pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
2686 parse.ric_len);
2687 if (auth_alg == WLAN_AUTH_FT)
2688 *elem_count +=
2689 ieee802_11_ie_count(ric_start,
2690 pos - ric_start);
2691 }
2692 if (ric_start == pos)
2693 ric_start = NULL;
2694
2695 if (omit_rsnxe) {
2696 rsnxe_len = 0;
2697 } else {
2698 res = wpa_write_rsnxe(&sm->wpa_auth->conf, rsnxe,
2699 sizeof(rsnxe_buf));
2700 if (res < 0)
2701 return NULL;
2702 rsnxe_len = res;
2703 }
2704 #ifdef CONFIG_TESTING_OPTIONS
2705 if (auth_alg == WLAN_AUTH_FT &&
2706 sm->wpa_auth->conf.rsnxe_override_ft_set) {
2707 wpa_printf(MSG_DEBUG,
2708 "TESTING: RSNXE FT override for MIC calculation");
2709 rsnxe = sm->wpa_auth->conf.rsnxe_override_ft;
2710 rsnxe_len = sm->wpa_auth->conf.rsnxe_override_ft_len;
2711 }
2712 #endif /* CONFIG_TESTING_OPTIONS */
2713 if (auth_alg == WLAN_AUTH_FT && rsnxe_len)
2714 *elem_count += 1;
2715
2716 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2717 kck = sm->PTK.kck2;
2718 kck_len = sm->PTK.kck2_len;
2719 } else {
2720 kck = sm->PTK.kck;
2721 kck_len = sm->PTK.kck_len;
2722 }
2723 if (auth_alg == WLAN_AUTH_FT &&
2724 wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 6,
2725 mdie, mdie_len, ftie, ftie_len,
2726 rsnie, rsnie_len,
2727 ric_start, ric_start ? pos - ric_start : 0,
2728 rsnxe_len ? rsnxe : NULL, rsnxe_len,
2729 fte_mic) < 0) {
2730 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
2731 return NULL;
2732 }
2733
2734 os_free(sm->assoc_resp_ftie);
2735 sm->assoc_resp_ftie = os_malloc(ftie_len);
2736 if (!sm->assoc_resp_ftie)
2737 return NULL;
2738 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
2739
2740 return pos;
2741 }
2742
2743
wpa_auth_set_key(struct wpa_authenticator * wpa_auth,int vlan_id,enum wpa_alg alg,const u8 * addr,int idx,u8 * key,size_t key_len,enum key_flag key_flag)2744 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
2745 int vlan_id,
2746 enum wpa_alg alg, const u8 *addr, int idx,
2747 u8 *key, size_t key_len,
2748 enum key_flag key_flag)
2749 {
2750 if (wpa_auth->cb->set_key == NULL)
2751 return -1;
2752 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
2753 key, key_len, key_flag);
2754 }
2755
2756
wpa_auth_add_sta_ft(struct wpa_authenticator * wpa_auth,const u8 * addr)2757 static inline int wpa_auth_add_sta_ft(struct wpa_authenticator *wpa_auth,
2758 const u8 *addr)
2759 {
2760 if (!wpa_auth->cb->add_sta_ft)
2761 return -1;
2762 return wpa_auth->cb->add_sta_ft(wpa_auth->cb_ctx, addr);
2763 }
2764
2765
wpa_ft_install_ptk(struct wpa_state_machine * sm,int retry)2766 void wpa_ft_install_ptk(struct wpa_state_machine *sm, int retry)
2767 {
2768 enum wpa_alg alg;
2769 int klen;
2770
2771 /* MLME-SETKEYS.request(PTK) */
2772 alg = wpa_cipher_to_alg(sm->pairwise);
2773 klen = wpa_cipher_key_len(sm->pairwise);
2774 if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
2775 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
2776 "PTK configuration", sm->pairwise);
2777 return;
2778 }
2779
2780 if (sm->tk_already_set) {
2781 /* Must avoid TK reconfiguration to prevent clearing of TX/RX
2782 * PN in the driver */
2783 wpa_printf(MSG_DEBUG,
2784 "FT: Do not re-install same PTK to the driver");
2785 return;
2786 }
2787
2788 if (!retry)
2789 wpa_auth_add_sta_ft(sm->wpa_auth, sm->addr);
2790
2791 /* FIX: add STA entry to kernel/driver here? The set_key will fail
2792 * most likely without this.. At the moment, STA entry is added only
2793 * after association has been completed. This function will be called
2794 * again after association to get the PTK configured, but that could be
2795 * optimized by adding the STA entry earlier.
2796 */
2797 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, sm->keyidx_active,
2798 sm->PTK.tk, klen, KEY_FLAG_PAIRWISE_RX_TX))
2799 return;
2800
2801 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2802 sm->pairwise_set = true;
2803 sm->tk_already_set = true;
2804 }
2805
2806
2807 /* Derive PMK-R1 from PSK, check all available PSK */
wpa_ft_psk_pmk_r1(struct wpa_state_machine * sm,const u8 * req_pmk_r1_name,u8 * out_pmk_r1,int * out_pairwise,struct vlan_description * out_vlan,const u8 ** out_identity,size_t * out_identity_len,const u8 ** out_radius_cui,size_t * out_radius_cui_len,int * out_session_timeout)2808 static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm,
2809 const u8 *req_pmk_r1_name,
2810 u8 *out_pmk_r1, int *out_pairwise,
2811 struct vlan_description *out_vlan,
2812 const u8 **out_identity, size_t *out_identity_len,
2813 const u8 **out_radius_cui,
2814 size_t *out_radius_cui_len,
2815 int *out_session_timeout)
2816 {
2817 const u8 *pmk = NULL;
2818 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2819 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
2820 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2821 const u8 *mdid = wpa_auth->conf.mobility_domain;
2822 const u8 *r0kh = sm->r0kh_id;
2823 size_t r0kh_len = sm->r0kh_id_len;
2824 const u8 *r1kh = wpa_auth->conf.r1_key_holder;
2825 const u8 *ssid = wpa_auth->conf.ssid;
2826 size_t ssid_len = wpa_auth->conf.ssid_len;
2827 int pairwise;
2828
2829 pairwise = sm->pairwise;
2830
2831 for (;;) {
2832 pmk = wpa_ft_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr,
2833 pmk);
2834 if (pmk == NULL)
2835 break;
2836
2837 if (wpa_derive_pmk_r0(pmk, PMK_LEN, ssid, ssid_len, mdid, r0kh,
2838 r0kh_len, sm->addr,
2839 pmk_r0, pmk_r0_name, 0) < 0 ||
2840 wpa_derive_pmk_r1(pmk_r0, PMK_LEN, pmk_r0_name, r1kh,
2841 sm->addr, pmk_r1, pmk_r1_name) < 0 ||
2842 os_memcmp_const(pmk_r1_name, req_pmk_r1_name,
2843 WPA_PMK_NAME_LEN) != 0)
2844 continue;
2845
2846 /* We found a PSK that matches the requested pmk_r1_name */
2847 wpa_printf(MSG_DEBUG,
2848 "FT: Found PSK to generate PMK-R1 locally");
2849 os_memcpy(out_pmk_r1, pmk_r1, PMK_LEN);
2850 if (out_pairwise)
2851 *out_pairwise = pairwise;
2852 os_memcpy(sm->PMK, pmk, PMK_LEN);
2853 sm->pmk_len = PMK_LEN;
2854 if (out_vlan &&
2855 wpa_ft_get_vlan(sm->wpa_auth, sm->addr, out_vlan) < 0) {
2856 wpa_printf(MSG_DEBUG, "FT: vlan not available for STA "
2857 MACSTR, MAC2STR(sm->addr));
2858 return -1;
2859 }
2860
2861 if (out_identity && out_identity_len) {
2862 *out_identity_len = wpa_ft_get_identity(
2863 sm->wpa_auth, sm->addr, out_identity);
2864 }
2865
2866 if (out_radius_cui && out_radius_cui_len) {
2867 *out_radius_cui_len = wpa_ft_get_radius_cui(
2868 sm->wpa_auth, sm->addr, out_radius_cui);
2869 }
2870
2871 if (out_session_timeout) {
2872 *out_session_timeout = wpa_ft_get_session_timeout(
2873 sm->wpa_auth, sm->addr);
2874 }
2875
2876 return 0;
2877 }
2878
2879 wpa_printf(MSG_DEBUG,
2880 "FT: Did not find PSK to generate PMK-R1 locally");
2881 return -1;
2882 }
2883
2884
2885 /* Detect the configuration the station asked for.
2886 * Required to detect FT-PSK and pairwise cipher.
2887 */
wpa_ft_set_key_mgmt(struct wpa_state_machine * sm,struct wpa_ft_ies * parse)2888 static int wpa_ft_set_key_mgmt(struct wpa_state_machine *sm,
2889 struct wpa_ft_ies *parse)
2890 {
2891 int key_mgmt, ciphers;
2892
2893 if (sm->wpa_key_mgmt)
2894 return 0;
2895
2896 key_mgmt = parse->key_mgmt & sm->wpa_auth->conf.wpa_key_mgmt;
2897 if (!key_mgmt) {
2898 wpa_printf(MSG_DEBUG, "FT: Invalid key mgmt (0x%x) from "
2899 MACSTR, parse->key_mgmt, MAC2STR(sm->addr));
2900 return -1;
2901 }
2902 if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
2903 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
2904 #ifdef CONFIG_SHA384
2905 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2906 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
2907 #endif /* CONFIG_SHA384 */
2908 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
2909 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
2910 #ifdef CONFIG_FILS
2911 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256)
2912 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA256;
2913 else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384)
2914 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA384;
2915 #endif /* CONFIG_FILS */
2916 ciphers = parse->pairwise_cipher & sm->wpa_auth->conf.rsn_pairwise;
2917 if (!ciphers) {
2918 wpa_printf(MSG_DEBUG, "FT: Invalid pairwise cipher (0x%x) from "
2919 MACSTR,
2920 parse->pairwise_cipher, MAC2STR(sm->addr));
2921 return -1;
2922 }
2923 sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0);
2924
2925 return 0;
2926 }
2927
2928
wpa_ft_local_derive_pmk_r1(struct wpa_authenticator * wpa_auth,struct wpa_state_machine * sm,const u8 * r0kh_id,size_t r0kh_id_len,const u8 * req_pmk_r0_name,const u8 * req_pmk_r1_name,u8 * out_pmk_r1,int * out_pairwise,struct vlan_description * vlan,const u8 ** identity,size_t * identity_len,const u8 ** radius_cui,size_t * radius_cui_len,int * out_session_timeout)2929 static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
2930 struct wpa_state_machine *sm,
2931 const u8 *r0kh_id, size_t r0kh_id_len,
2932 const u8 *req_pmk_r0_name,
2933 const u8 *req_pmk_r1_name,
2934 u8 *out_pmk_r1, int *out_pairwise,
2935 struct vlan_description *vlan,
2936 const u8 **identity, size_t *identity_len,
2937 const u8 **radius_cui,
2938 size_t *radius_cui_len,
2939 int *out_session_timeout)
2940 {
2941 struct wpa_auth_config *conf = &wpa_auth->conf;
2942 const struct wpa_ft_pmk_r0_sa *r0;
2943 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
2944 int expires_in = 0;
2945 int session_timeout = 0;
2946 struct os_reltime now;
2947
2948 if (conf->r0_key_holder_len != r0kh_id_len ||
2949 os_memcmp(conf->r0_key_holder, r0kh_id, conf->r0_key_holder_len) !=
2950 0)
2951 return -1; /* not our R0KH-ID */
2952
2953 wpa_printf(MSG_DEBUG, "FT: STA R0KH-ID matching local configuration");
2954 if (wpa_ft_fetch_pmk_r0(sm->wpa_auth, sm->addr, req_pmk_r0_name, &r0) <
2955 0)
2956 return -1; /* no matching PMKR0Name in local cache */
2957
2958 wpa_printf(MSG_DEBUG, "FT: Requested PMKR0Name found in local cache");
2959
2960 if (wpa_derive_pmk_r1(r0->pmk_r0, r0->pmk_r0_len, r0->pmk_r0_name,
2961 conf->r1_key_holder,
2962 sm->addr, out_pmk_r1, pmk_r1_name) < 0)
2963 return -1;
2964 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", out_pmk_r1, r0->pmk_r0_len);
2965 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
2966
2967 os_get_reltime(&now);
2968 if (r0->expiration)
2969 expires_in = r0->expiration - now.sec;
2970
2971 if (r0->session_timeout)
2972 session_timeout = r0->session_timeout - now.sec;
2973
2974 wpa_ft_store_pmk_r1(wpa_auth, sm->addr, out_pmk_r1, r0->pmk_r0_len,
2975 pmk_r1_name,
2976 sm->pairwise, r0->vlan, expires_in, session_timeout,
2977 r0->identity, r0->identity_len,
2978 r0->radius_cui, r0->radius_cui_len);
2979
2980 *out_pairwise = sm->pairwise;
2981 if (vlan) {
2982 if (r0->vlan)
2983 *vlan = *r0->vlan;
2984 else
2985 os_memset(vlan, 0, sizeof(*vlan));
2986 }
2987
2988 if (identity && identity_len) {
2989 *identity = r0->identity;
2990 *identity_len = r0->identity_len;
2991 }
2992
2993 if (radius_cui && radius_cui_len) {
2994 *radius_cui = r0->radius_cui;
2995 *radius_cui_len = r0->radius_cui_len;
2996 }
2997
2998 *out_session_timeout = session_timeout;
2999
3000 return 0;
3001 }
3002
3003
wpa_ft_process_auth_req(struct wpa_state_machine * sm,const u8 * ies,size_t ies_len,u8 ** resp_ies,size_t * resp_ies_len)3004 static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
3005 const u8 *ies, size_t ies_len,
3006 u8 **resp_ies, size_t *resp_ies_len)
3007 {
3008 struct rsn_mdie *mdie;
3009 u8 pmk_r1[PMK_LEN_MAX], pmk_r1_name[WPA_PMK_NAME_LEN];
3010 u8 ptk_name[WPA_PMK_NAME_LEN];
3011 struct wpa_auth_config *conf;
3012 struct wpa_ft_ies parse;
3013 size_t buflen;
3014 int ret;
3015 u8 *pos, *end;
3016 int pairwise, session_timeout = 0;
3017 struct vlan_description vlan;
3018 const u8 *identity, *radius_cui;
3019 size_t identity_len = 0, radius_cui_len = 0;
3020 int use_sha384;
3021 size_t pmk_r1_len;
3022
3023 *resp_ies = NULL;
3024 *resp_ies_len = 0;
3025
3026 sm->pmk_r1_name_valid = 0;
3027 conf = &sm->wpa_auth->conf;
3028
3029 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
3030 ies, ies_len);
3031
3032 if (wpa_ft_parse_ies(ies, ies_len, &parse, -1)) {
3033 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
3034 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3035 }
3036 use_sha384 = wpa_key_mgmt_sha384(parse.key_mgmt);
3037 pmk_r1_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
3038
3039 mdie = (struct rsn_mdie *) parse.mdie;
3040 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
3041 os_memcmp(mdie->mobility_domain,
3042 sm->wpa_auth->conf.mobility_domain,
3043 MOBILITY_DOMAIN_ID_LEN) != 0) {
3044 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
3045 return WLAN_STATUS_INVALID_MDIE;
3046 }
3047
3048 if (use_sha384) {
3049 struct rsn_ftie_sha384 *ftie;
3050
3051 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
3052 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
3053 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3054 return WLAN_STATUS_INVALID_FTIE;
3055 }
3056
3057 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
3058 } else {
3059 struct rsn_ftie *ftie;
3060
3061 ftie = (struct rsn_ftie *) parse.ftie;
3062 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
3063 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3064 return WLAN_STATUS_INVALID_FTIE;
3065 }
3066
3067 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
3068 }
3069
3070 if (parse.r0kh_id == NULL) {
3071 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
3072 return WLAN_STATUS_INVALID_FTIE;
3073 }
3074
3075 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
3076 parse.r0kh_id, parse.r0kh_id_len);
3077 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
3078 sm->r0kh_id_len = parse.r0kh_id_len;
3079
3080 if (parse.rsn_pmkid == NULL) {
3081 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
3082 return WLAN_STATUS_INVALID_PMKID;
3083 }
3084
3085 if (wpa_ft_set_key_mgmt(sm, &parse) < 0)
3086 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3087
3088 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
3089 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
3090 if (wpa_derive_pmk_r1_name(parse.rsn_pmkid,
3091 sm->wpa_auth->conf.r1_key_holder, sm->addr,
3092 pmk_r1_name, use_sha384) < 0)
3093 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3094 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
3095 pmk_r1_name, WPA_PMK_NAME_LEN);
3096
3097 if (conf->ft_psk_generate_local &&
3098 wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
3099 if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise,
3100 &vlan, &identity, &identity_len,
3101 &radius_cui, &radius_cui_len,
3102 &session_timeout) < 0)
3103 return WLAN_STATUS_INVALID_PMKID;
3104 wpa_printf(MSG_DEBUG,
3105 "FT: Generated PMK-R1 for FT-PSK locally");
3106 } else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name,
3107 pmk_r1, &pmk_r1_len, &pairwise, &vlan,
3108 &identity, &identity_len, &radius_cui,
3109 &radius_cui_len, &session_timeout) < 0) {
3110 wpa_printf(MSG_DEBUG,
3111 "FT: No PMK-R1 available in local cache for the requested PMKR1Name");
3112 if (wpa_ft_local_derive_pmk_r1(sm->wpa_auth, sm,
3113 parse.r0kh_id, parse.r0kh_id_len,
3114 parse.rsn_pmkid,
3115 pmk_r1_name, pmk_r1, &pairwise,
3116 &vlan, &identity, &identity_len,
3117 &radius_cui, &radius_cui_len,
3118 &session_timeout) == 0) {
3119 wpa_printf(MSG_DEBUG,
3120 "FT: Generated PMK-R1 based on local PMK-R0");
3121 goto pmk_r1_derived;
3122 }
3123
3124 if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
3125 wpa_printf(MSG_DEBUG,
3126 "FT: Did not have matching PMK-R1 and either unknown or blocked R0KH-ID or NAK from R0KH");
3127 return WLAN_STATUS_INVALID_PMKID;
3128 }
3129
3130 return -1; /* Status pending */
3131 } else {
3132 wpa_printf(MSG_DEBUG, "FT: Found PMKR1Name from local cache");
3133 }
3134
3135 pmk_r1_derived:
3136 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, pmk_r1_len);
3137 sm->pmk_r1_name_valid = 1;
3138 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
3139 os_memcpy(sm->pmk_r1, pmk_r1, pmk_r1_len);
3140 sm->pmk_r1_len = pmk_r1_len;
3141
3142 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
3143 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
3144 "ANonce");
3145 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3146 }
3147
3148 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3149 sm->SNonce, WPA_NONCE_LEN);
3150 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
3151 sm->ANonce, WPA_NONCE_LEN);
3152
3153 if (wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce,
3154 sm->addr, sm->wpa_auth->addr, pmk_r1_name,
3155 &sm->PTK, ptk_name, sm->wpa_key_mgmt,
3156 pairwise) < 0)
3157 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3158
3159 sm->pairwise = pairwise;
3160 sm->PTK_valid = true;
3161 sm->tk_already_set = false;
3162 wpa_ft_install_ptk(sm, 0);
3163
3164 if (wpa_ft_set_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
3165 wpa_printf(MSG_DEBUG, "FT: Failed to configure VLAN");
3166 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3167 }
3168 if (wpa_ft_set_identity(sm->wpa_auth, sm->addr,
3169 identity, identity_len) < 0 ||
3170 wpa_ft_set_radius_cui(sm->wpa_auth, sm->addr,
3171 radius_cui, radius_cui_len) < 0) {
3172 wpa_printf(MSG_DEBUG, "FT: Failed to configure identity/CUI");
3173 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3174 }
3175 wpa_ft_set_session_timeout(sm->wpa_auth, sm->addr, session_timeout);
3176
3177 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
3178 2 + FT_R1KH_ID_LEN + 200;
3179 *resp_ies = os_zalloc(buflen);
3180 if (*resp_ies == NULL)
3181 goto fail;
3182
3183 pos = *resp_ies;
3184 end = *resp_ies + buflen;
3185
3186 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
3187 if (ret < 0)
3188 goto fail;
3189 pos += ret;
3190
3191 ret = wpa_write_mdie(conf, pos, end - pos);
3192 if (ret < 0)
3193 goto fail;
3194 pos += ret;
3195
3196 ret = wpa_write_ftie(conf, use_sha384, parse.r0kh_id, parse.r0kh_id_len,
3197 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0,
3198 0);
3199 if (ret < 0)
3200 goto fail;
3201 pos += ret;
3202
3203 *resp_ies_len = pos - *resp_ies;
3204
3205 return WLAN_STATUS_SUCCESS;
3206 fail:
3207 os_free(*resp_ies);
3208 *resp_ies = NULL;
3209 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3210 }
3211
3212
wpa_ft_process_auth(struct wpa_state_machine * sm,const u8 * bssid,u16 auth_transaction,const u8 * ies,size_t ies_len,void (* cb)(void * ctx,const u8 * dst,const u8 * bssid,u16 auth_transaction,u16 status,const u8 * ies,size_t ies_len),void * ctx)3213 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
3214 u16 auth_transaction, const u8 *ies, size_t ies_len,
3215 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
3216 u16 auth_transaction, u16 status,
3217 const u8 *ies, size_t ies_len),
3218 void *ctx)
3219 {
3220 u16 status;
3221 u8 *resp_ies;
3222 size_t resp_ies_len;
3223 int res;
3224
3225 if (sm == NULL) {
3226 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
3227 "WPA SM not available");
3228 return;
3229 }
3230
3231 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
3232 " BSSID=" MACSTR " transaction=%d",
3233 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
3234 sm->ft_pending_cb = cb;
3235 sm->ft_pending_cb_ctx = ctx;
3236 sm->ft_pending_auth_transaction = auth_transaction;
3237 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3238 res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
3239 &resp_ies_len);
3240 if (res < 0) {
3241 wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
3242 return;
3243 }
3244 status = res;
3245
3246 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
3247 " auth_transaction=%d status=%u (%s)",
3248 MAC2STR(sm->addr), auth_transaction + 1, status,
3249 status2str(status));
3250 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3251 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
3252 resp_ies, resp_ies_len);
3253 os_free(resp_ies);
3254 }
3255
3256
wpa_ft_validate_reassoc(struct wpa_state_machine * sm,const u8 * ies,size_t ies_len)3257 int wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
3258 size_t ies_len)
3259 {
3260 struct wpa_ft_ies parse;
3261 struct rsn_mdie *mdie;
3262 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
3263 size_t mic_len = 16;
3264 unsigned int count;
3265 const u8 *kck;
3266 size_t kck_len;
3267 int use_sha384;
3268 const u8 *anonce, *snonce, *fte_mic;
3269 u8 fte_elem_count;
3270 int rsnxe_used;
3271 struct wpa_auth_config *conf;
3272
3273 if (sm == NULL)
3274 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3275
3276 conf = &sm->wpa_auth->conf;
3277 use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3278
3279 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
3280
3281 if (wpa_ft_parse_ies(ies, ies_len, &parse, use_sha384) < 0) {
3282 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
3283 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3284 }
3285
3286 if (parse.rsn == NULL) {
3287 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
3288 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3289 }
3290
3291 if (parse.rsn_pmkid == NULL) {
3292 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
3293 return WLAN_STATUS_INVALID_PMKID;
3294 }
3295
3296 if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
3297 != 0) {
3298 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
3299 "with the PMKR1Name derived from auth request");
3300 return WLAN_STATUS_INVALID_PMKID;
3301 }
3302
3303 mdie = (struct rsn_mdie *) parse.mdie;
3304 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
3305 os_memcmp(mdie->mobility_domain, conf->mobility_domain,
3306 MOBILITY_DOMAIN_ID_LEN) != 0) {
3307 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
3308 return WLAN_STATUS_INVALID_MDIE;
3309 }
3310
3311 if (use_sha384) {
3312 struct rsn_ftie_sha384 *ftie;
3313
3314 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
3315 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3316 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3317 return WLAN_STATUS_INVALID_FTIE;
3318 }
3319
3320 anonce = ftie->anonce;
3321 snonce = ftie->snonce;
3322 rsnxe_used = ftie->mic_control[0] & 0x01;
3323 fte_elem_count = ftie->mic_control[1];
3324 fte_mic = ftie->mic;
3325 } else {
3326 struct rsn_ftie *ftie;
3327
3328 ftie = (struct rsn_ftie *) parse.ftie;
3329 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
3330 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
3331 return WLAN_STATUS_INVALID_FTIE;
3332 }
3333
3334 anonce = ftie->anonce;
3335 snonce = ftie->snonce;
3336 rsnxe_used = ftie->mic_control[0] & 0x01;
3337 fte_elem_count = ftie->mic_control[1];
3338 fte_mic = ftie->mic;
3339 }
3340
3341 if (os_memcmp(snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
3342 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
3343 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
3344 snonce, WPA_NONCE_LEN);
3345 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
3346 sm->SNonce, WPA_NONCE_LEN);
3347 return WLAN_STATUS_INVALID_FTIE;
3348 }
3349
3350 if (os_memcmp(anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
3351 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
3352 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
3353 anonce, WPA_NONCE_LEN);
3354 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
3355 sm->ANonce, WPA_NONCE_LEN);
3356 return WLAN_STATUS_INVALID_FTIE;
3357 }
3358
3359
3360 if (parse.r0kh_id == NULL) {
3361 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
3362 return WLAN_STATUS_INVALID_FTIE;
3363 }
3364
3365 if (parse.r0kh_id_len != sm->r0kh_id_len ||
3366 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
3367 {
3368 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
3369 "the current R0KH-ID");
3370 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
3371 parse.r0kh_id, parse.r0kh_id_len);
3372 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
3373 sm->r0kh_id, sm->r0kh_id_len);
3374 return WLAN_STATUS_INVALID_FTIE;
3375 }
3376
3377 if (parse.r1kh_id == NULL) {
3378 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
3379 return WLAN_STATUS_INVALID_FTIE;
3380 }
3381
3382 if (os_memcmp_const(parse.r1kh_id, conf->r1_key_holder,
3383 FT_R1KH_ID_LEN) != 0) {
3384 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
3385 "ReassocReq");
3386 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
3387 parse.r1kh_id, FT_R1KH_ID_LEN);
3388 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
3389 conf->r1_key_holder, FT_R1KH_ID_LEN);
3390 return WLAN_STATUS_INVALID_FTIE;
3391 }
3392
3393 if (parse.rsn_pmkid == NULL ||
3394 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
3395 {
3396 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
3397 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
3398 return WLAN_STATUS_INVALID_PMKID;
3399 }
3400
3401 count = 3;
3402 if (parse.ric)
3403 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
3404 if (parse.rsnxe)
3405 count++;
3406 if (fte_elem_count != count) {
3407 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
3408 "Control: received %u expected %u",
3409 fte_elem_count, count);
3410 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3411 }
3412
3413 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
3414 kck = sm->PTK.kck2;
3415 kck_len = sm->PTK.kck2_len;
3416 } else {
3417 kck = sm->PTK.kck;
3418 kck_len = sm->PTK.kck_len;
3419 }
3420 if (wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 5,
3421 parse.mdie - 2, parse.mdie_len + 2,
3422 parse.ftie - 2, parse.ftie_len + 2,
3423 parse.rsn - 2, parse.rsn_len + 2,
3424 parse.ric, parse.ric_len,
3425 parse.rsnxe ? parse.rsnxe - 2 : NULL,
3426 parse.rsnxe ? parse.rsnxe_len + 2 : 0,
3427 mic) < 0) {
3428 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
3429 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3430 }
3431
3432 if (os_memcmp_const(mic, fte_mic, mic_len) != 0) {
3433 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
3434 wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
3435 MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
3436 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
3437 fte_mic, mic_len);
3438 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
3439 wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
3440 parse.mdie - 2, parse.mdie_len + 2);
3441 wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
3442 parse.ftie - 2, parse.ftie_len + 2);
3443 wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
3444 parse.rsn - 2, parse.rsn_len + 2);
3445 wpa_hexdump(MSG_MSGDUMP, "FT: RSNXE",
3446 parse.rsnxe ? parse.rsnxe - 2 : NULL,
3447 parse.rsnxe ? parse.rsnxe_len + 2 : 0);
3448 return WLAN_STATUS_INVALID_FTIE;
3449 }
3450
3451 if (rsnxe_used && (conf->sae_pwe == 1 || conf->sae_pwe == 2) &&
3452 !parse.rsnxe) {
3453 wpa_printf(MSG_INFO,
3454 "FT: FTE indicated that STA uses RSNXE, but RSNXE was not included");
3455 return -1; /* discard request */
3456 }
3457
3458 #ifdef CONFIG_OCV
3459 if (wpa_auth_uses_ocv(sm)) {
3460 struct wpa_channel_info ci;
3461 int tx_chanwidth;
3462 int tx_seg1_idx;
3463
3464 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3465 wpa_printf(MSG_WARNING,
3466 "Failed to get channel info to validate received OCI in (Re)Assoc Request");
3467 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3468 }
3469
3470 if (get_sta_tx_parameters(sm,
3471 channel_width_to_int(ci.chanwidth),
3472 ci.seg1_idx, &tx_chanwidth,
3473 &tx_seg1_idx) < 0)
3474 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3475
3476 if (ocv_verify_tx_params(parse.oci, parse.oci_len, &ci,
3477 tx_chanwidth, tx_seg1_idx) != 0) {
3478 wpa_printf(MSG_WARNING, "%s", ocv_errorstr);
3479 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3480 }
3481 }
3482 #endif /* CONFIG_OCV */
3483
3484 return WLAN_STATUS_SUCCESS;
3485 }
3486
3487
wpa_ft_action_rx(struct wpa_state_machine * sm,const u8 * data,size_t len)3488 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
3489 {
3490 const u8 *sta_addr, *target_ap;
3491 const u8 *ies;
3492 size_t ies_len;
3493 u8 action;
3494 struct ft_rrb_frame *frame;
3495
3496 if (sm == NULL)
3497 return -1;
3498
3499 /*
3500 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3501 * FT Request action frame body[variable]
3502 */
3503
3504 if (len < 14) {
3505 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
3506 "(len=%lu)", (unsigned long) len);
3507 return -1;
3508 }
3509
3510 action = data[1];
3511 sta_addr = data + 2;
3512 target_ap = data + 8;
3513 ies = data + 14;
3514 ies_len = len - 14;
3515
3516 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
3517 " Target AP=" MACSTR " Action=%d)",
3518 MAC2STR(sta_addr), MAC2STR(target_ap), action);
3519
3520 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
3521 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
3522 "STA=" MACSTR " STA-Address=" MACSTR,
3523 MAC2STR(sm->addr), MAC2STR(sta_addr));
3524 return -1;
3525 }
3526
3527 /*
3528 * Do some sanity checking on the target AP address (not own and not
3529 * broadcast. This could be extended to filter based on a list of known
3530 * APs in the MD (if such a list were configured).
3531 */
3532 if ((target_ap[0] & 0x01) ||
3533 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
3534 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
3535 "frame");
3536 return -1;
3537 }
3538
3539 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
3540
3541 if (!sm->wpa_auth->conf.ft_over_ds) {
3542 wpa_printf(MSG_DEBUG, "FT: Over-DS option disabled - reject");
3543 return -1;
3544 }
3545
3546 /* RRB - Forward action frame to the target AP */
3547 frame = os_malloc(sizeof(*frame) + len);
3548 if (frame == NULL)
3549 return -1;
3550 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3551 frame->packet_type = FT_PACKET_REQUEST;
3552 frame->action_length = host_to_le16(len);
3553 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
3554 os_memcpy(frame + 1, data, len);
3555
3556 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
3557 sizeof(*frame) + len);
3558 os_free(frame);
3559
3560 return 0;
3561 }
3562
3563
wpa_ft_rrb_rx_request_cb(void * ctx,const u8 * dst,const u8 * bssid,u16 auth_transaction,u16 resp,const u8 * ies,size_t ies_len)3564 static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
3565 u16 auth_transaction, u16 resp,
3566 const u8 *ies, size_t ies_len)
3567 {
3568 struct wpa_state_machine *sm = ctx;
3569 wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
3570 MAC2STR(sm->addr));
3571 wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
3572 WLAN_STATUS_SUCCESS, ies, ies_len);
3573 }
3574
3575
wpa_ft_rrb_rx_request(struct wpa_authenticator * wpa_auth,const u8 * current_ap,const u8 * sta_addr,const u8 * body,size_t len)3576 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
3577 const u8 *current_ap, const u8 *sta_addr,
3578 const u8 *body, size_t len)
3579 {
3580 struct wpa_state_machine *sm;
3581 u16 status;
3582 u8 *resp_ies;
3583 size_t resp_ies_len;
3584 int res;
3585
3586 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
3587 if (sm == NULL) {
3588 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
3589 "RRB Request");
3590 return -1;
3591 }
3592
3593 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
3594
3595 sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
3596 sm->ft_pending_cb_ctx = sm;
3597 os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
3598 sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries;
3599 res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
3600 &resp_ies_len);
3601 if (res < 0) {
3602 wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
3603 return 0;
3604 }
3605 status = res;
3606
3607 res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
3608 resp_ies, resp_ies_len);
3609 os_free(resp_ies);
3610 return res;
3611 }
3612
3613
wpa_ft_send_rrb_auth_resp(struct wpa_state_machine * sm,const u8 * current_ap,const u8 * sta_addr,u16 status,const u8 * resp_ies,size_t resp_ies_len)3614 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
3615 const u8 *current_ap, const u8 *sta_addr,
3616 u16 status, const u8 *resp_ies,
3617 size_t resp_ies_len)
3618 {
3619 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3620 size_t rlen;
3621 struct ft_rrb_frame *frame;
3622 u8 *pos;
3623
3624 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
3625 " CurrentAP=" MACSTR " status=%u (%s)",
3626 MAC2STR(sm->addr), MAC2STR(current_ap), status,
3627 status2str(status));
3628 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
3629
3630 /* RRB - Forward action frame response to the Current AP */
3631
3632 /*
3633 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
3634 * Status_Code[2] FT Request action frame body[variable]
3635 */
3636 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
3637
3638 frame = os_malloc(sizeof(*frame) + rlen);
3639 if (frame == NULL)
3640 return -1;
3641 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
3642 frame->packet_type = FT_PACKET_RESPONSE;
3643 frame->action_length = host_to_le16(rlen);
3644 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
3645 pos = (u8 *) (frame + 1);
3646 *pos++ = WLAN_ACTION_FT;
3647 *pos++ = 2; /* Action: Response */
3648 os_memcpy(pos, sta_addr, ETH_ALEN);
3649 pos += ETH_ALEN;
3650 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
3651 pos += ETH_ALEN;
3652 WPA_PUT_LE16(pos, status);
3653 pos += 2;
3654 if (resp_ies)
3655 os_memcpy(pos, resp_ies, resp_ies_len);
3656
3657 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
3658 sizeof(*frame) + rlen);
3659 os_free(frame);
3660
3661 return 0;
3662 }
3663
3664
wpa_ft_rrb_build_r0(const u8 * key,const size_t key_len,const struct tlv_list * tlvs,const struct wpa_ft_pmk_r0_sa * pmk_r0,const u8 * r1kh_id,const u8 * s1kh_id,const struct tlv_list * tlv_auth,const u8 * src_addr,u8 type,u8 ** packet,size_t * packet_len)3665 static int wpa_ft_rrb_build_r0(const u8 *key, const size_t key_len,
3666 const struct tlv_list *tlvs,
3667 const struct wpa_ft_pmk_r0_sa *pmk_r0,
3668 const u8 *r1kh_id, const u8 *s1kh_id,
3669 const struct tlv_list *tlv_auth,
3670 const u8 *src_addr, u8 type,
3671 u8 **packet, size_t *packet_len)
3672 {
3673 u8 pmk_r1[PMK_LEN_MAX];
3674 size_t pmk_r1_len = pmk_r0->pmk_r0_len;
3675 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
3676 u8 f_pairwise[sizeof(le16)];
3677 u8 f_expires_in[sizeof(le16)];
3678 u8 f_session_timeout[sizeof(le32)];
3679 int expires_in;
3680 int session_timeout;
3681 struct os_reltime now;
3682 int ret;
3683 struct tlv_list sess_tlv[] = {
3684 { .type = FT_RRB_PMK_R1, .len = pmk_r1_len,
3685 .data = pmk_r1 },
3686 { .type = FT_RRB_PMK_R1_NAME, .len = sizeof(pmk_r1_name),
3687 .data = pmk_r1_name },
3688 { .type = FT_RRB_PAIRWISE, .len = sizeof(f_pairwise),
3689 .data = f_pairwise },
3690 { .type = FT_RRB_EXPIRES_IN, .len = sizeof(f_expires_in),
3691 .data = f_expires_in },
3692 { .type = FT_RRB_IDENTITY, .len = pmk_r0->identity_len,
3693 .data = pmk_r0->identity },
3694 { .type = FT_RRB_RADIUS_CUI, .len = pmk_r0->radius_cui_len,
3695 .data = pmk_r0->radius_cui },
3696 { .type = FT_RRB_SESSION_TIMEOUT,
3697 .len = sizeof(f_session_timeout),
3698 .data = f_session_timeout },
3699 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
3700 };
3701
3702 if (wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_len,
3703 pmk_r0->pmk_r0_name, r1kh_id,
3704 s1kh_id, pmk_r1, pmk_r1_name) < 0)
3705 return -1;
3706 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 (for peer AP)",
3707 pmk_r1, pmk_r1_len);
3708 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name (for peer AP)",
3709 pmk_r1_name, WPA_PMK_NAME_LEN);
3710 WPA_PUT_LE16(f_pairwise, pmk_r0->pairwise);
3711
3712 os_get_reltime(&now);
3713 if (pmk_r0->expiration > now.sec)
3714 expires_in = pmk_r0->expiration - now.sec;
3715 else if (pmk_r0->expiration)
3716 expires_in = 1;
3717 else
3718 expires_in = 0;
3719 WPA_PUT_LE16(f_expires_in, expires_in);
3720
3721 if (pmk_r0->session_timeout > now.sec)
3722 session_timeout = pmk_r0->session_timeout - now.sec;
3723 else if (pmk_r0->session_timeout)
3724 session_timeout = 1;
3725 else
3726 session_timeout = 0;
3727 WPA_PUT_LE32(f_session_timeout, session_timeout);
3728
3729 ret = wpa_ft_rrb_build(key, key_len, tlvs, sess_tlv, tlv_auth,
3730 pmk_r0->vlan, src_addr, type,
3731 packet, packet_len);
3732
3733 forced_memzero(pmk_r1, sizeof(pmk_r1));
3734
3735 return ret;
3736 }
3737
3738
wpa_ft_rrb_rx_pull(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer)3739 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
3740 const u8 *src_addr,
3741 const u8 *enc, size_t enc_len,
3742 const u8 *auth, size_t auth_len,
3743 int no_defer)
3744 {
3745 const char *msgtype = "pull request";
3746 u8 *plain = NULL, *packet = NULL;
3747 size_t plain_len = 0, packet_len = 0;
3748 struct ft_remote_r1kh *r1kh, *r1kh_wildcard;
3749 const u8 *key;
3750 size_t key_len;
3751 int seq_ret;
3752 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id, *f_s1kh_id, *f_pmk_r0_name;
3753 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len, f_s1kh_id_len;
3754 size_t f_pmk_r0_name_len;
3755 const struct wpa_ft_pmk_r0_sa *r0;
3756 int ret;
3757 struct tlv_list resp[2];
3758 struct tlv_list resp_auth[5];
3759 struct ft_rrb_seq f_seq;
3760
3761 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
3762
3763 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3764 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3765
3766 if (wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len)) {
3767 wpa_printf(MSG_DEBUG, "FT: R0KH-ID mismatch");
3768 goto out;
3769 }
3770
3771 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3772 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3773
3774 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh, &r1kh_wildcard);
3775 if (r1kh) {
3776 key = r1kh->key;
3777 key_len = sizeof(r1kh->key);
3778 } else if (r1kh_wildcard) {
3779 wpa_printf(MSG_DEBUG, "FT: Using wildcard R1KH-ID");
3780 key = r1kh_wildcard->key;
3781 key_len = sizeof(r1kh_wildcard->key);
3782 } else {
3783 goto out;
3784 }
3785
3786 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "pull request", FT_RRB_NONCE_LEN);
3787 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
3788
3789 seq_ret = FT_RRB_SEQ_DROP;
3790 if (r1kh)
3791 seq_ret = wpa_ft_rrb_seq_chk(r1kh->seq, src_addr, enc, enc_len,
3792 auth, auth_len, msgtype, no_defer);
3793 if (!no_defer && r1kh_wildcard &&
3794 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
3795 /* wildcard: r1kh-id unknown or changed addr -> do a seq req */
3796 seq_ret = FT_RRB_SEQ_DEFER;
3797 }
3798
3799 if (seq_ret == FT_RRB_SEQ_DROP)
3800 goto out;
3801
3802 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3803 src_addr, FT_PACKET_R0KH_R1KH_PULL,
3804 &plain, &plain_len) < 0)
3805 goto out;
3806
3807 if (!r1kh)
3808 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard, src_addr,
3809 f_r1kh_id,
3810 wpa_auth->conf.rkh_pos_timeout);
3811 if (!r1kh)
3812 goto out;
3813
3814 if (seq_ret == FT_RRB_SEQ_DEFER) {
3815 wpa_ft_rrb_seq_req(wpa_auth, r1kh->seq, src_addr, f_r0kh_id,
3816 f_r0kh_id_len, f_r1kh_id, key, key_len,
3817 enc, enc_len, auth, auth_len,
3818 &wpa_ft_rrb_rx_pull);
3819 goto out;
3820 }
3821
3822 wpa_ft_rrb_seq_accept(wpa_auth, r1kh->seq, src_addr, auth, auth_len,
3823 msgtype);
3824 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
3825 wpa_auth->conf.rkh_pos_timeout);
3826
3827 RRB_GET(FT_RRB_PMK_R0_NAME, pmk_r0_name, msgtype, WPA_PMK_NAME_LEN);
3828 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", f_pmk_r0_name,
3829 f_pmk_r0_name_len);
3830
3831 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3832 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3833
3834 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
3835 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
3836 goto out;
3837 }
3838
3839 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull response from " MACSTR
3840 " to " MACSTR,
3841 MAC2STR(wpa_auth->addr), MAC2STR(src_addr));
3842
3843 resp[0].type = FT_RRB_S1KH_ID;
3844 resp[0].len = f_s1kh_id_len;
3845 resp[0].data = f_s1kh_id;
3846 resp[1].type = FT_RRB_LAST_EMPTY;
3847 resp[1].len = 0;
3848 resp[1].data = NULL;
3849
3850 resp_auth[0].type = FT_RRB_NONCE;
3851 resp_auth[0].len = f_nonce_len;
3852 resp_auth[0].data = f_nonce;
3853 resp_auth[1].type = FT_RRB_SEQ;
3854 resp_auth[1].len = sizeof(f_seq);
3855 resp_auth[1].data = (u8 *) &f_seq;
3856 resp_auth[2].type = FT_RRB_R0KH_ID;
3857 resp_auth[2].len = f_r0kh_id_len;
3858 resp_auth[2].data = f_r0kh_id;
3859 resp_auth[3].type = FT_RRB_R1KH_ID;
3860 resp_auth[3].len = f_r1kh_id_len;
3861 resp_auth[3].data = f_r1kh_id;
3862 resp_auth[4].type = FT_RRB_LAST_EMPTY;
3863 resp_auth[4].len = 0;
3864 resp_auth[4].data = NULL;
3865
3866 if (wpa_ft_fetch_pmk_r0(wpa_auth, f_s1kh_id, f_pmk_r0_name, &r0) < 0) {
3867 wpa_printf(MSG_DEBUG, "FT: No matching PMK-R0-Name found");
3868 ret = wpa_ft_rrb_build(key, key_len, resp, NULL, resp_auth,
3869 NULL, wpa_auth->addr,
3870 FT_PACKET_R0KH_R1KH_RESP,
3871 &packet, &packet_len);
3872 } else {
3873 ret = wpa_ft_rrb_build_r0(key, key_len, resp, r0, f_r1kh_id,
3874 f_s1kh_id, resp_auth, wpa_auth->addr,
3875 FT_PACKET_R0KH_R1KH_RESP,
3876 &packet, &packet_len);
3877 }
3878
3879 if (!ret)
3880 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
3881 FT_PACKET_R0KH_R1KH_RESP, packet,
3882 packet_len);
3883
3884 out:
3885 os_free(plain);
3886 os_free(packet);
3887
3888 return 0;
3889 }
3890
3891
3892 /* @returns 0 on success
3893 * -1 on error
3894 * -2 if FR_RRB_PAIRWISE is missing
3895 */
wpa_ft_rrb_rx_r1(struct wpa_authenticator * wpa_auth,const u8 * src_addr,u8 type,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,const char * msgtype,u8 * s1kh_id_out,int (* cb)(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer))3896 static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth,
3897 const u8 *src_addr, u8 type,
3898 const u8 *enc, size_t enc_len,
3899 const u8 *auth, size_t auth_len,
3900 const char *msgtype, u8 *s1kh_id_out,
3901 int (*cb)(struct wpa_authenticator *wpa_auth,
3902 const u8 *src_addr,
3903 const u8 *enc, size_t enc_len,
3904 const u8 *auth, size_t auth_len,
3905 int no_defer))
3906 {
3907 u8 *plain = NULL;
3908 size_t plain_len = 0;
3909 struct ft_remote_r0kh *r0kh, *r0kh_wildcard;
3910 const u8 *key;
3911 size_t key_len;
3912 int seq_ret;
3913 const u8 *f_r1kh_id, *f_s1kh_id, *f_r0kh_id;
3914 const u8 *f_pmk_r1_name, *f_pairwise, *f_pmk_r1;
3915 const u8 *f_expires_in;
3916 size_t f_r1kh_id_len, f_s1kh_id_len, f_r0kh_id_len;
3917 const u8 *f_identity, *f_radius_cui;
3918 const u8 *f_session_timeout;
3919 size_t f_pmk_r1_name_len, f_pairwise_len, f_pmk_r1_len;
3920 size_t f_expires_in_len;
3921 size_t f_identity_len, f_radius_cui_len;
3922 size_t f_session_timeout_len;
3923 int pairwise;
3924 int ret = -1;
3925 int expires_in;
3926 int session_timeout;
3927 struct vlan_description vlan;
3928 size_t pmk_r1_len;
3929
3930 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1);
3931 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len);
3932
3933 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN);
3934 wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id));
3935
3936 if (wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id)) {
3937 wpa_printf(MSG_DEBUG, "FT: R1KH-ID mismatch");
3938 goto out;
3939 }
3940
3941 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, &r0kh,
3942 &r0kh_wildcard);
3943 if (r0kh) {
3944 key = r0kh->key;
3945 key_len = sizeof(r0kh->key);
3946 } else if (r0kh_wildcard) {
3947 wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
3948 key = r0kh_wildcard->key;
3949 key_len = sizeof(r0kh_wildcard->key);
3950 } else {
3951 goto out;
3952 }
3953
3954 seq_ret = FT_RRB_SEQ_DROP;
3955 if (r0kh) {
3956 seq_ret = wpa_ft_rrb_seq_chk(r0kh->seq, src_addr, enc, enc_len,
3957 auth, auth_len, msgtype,
3958 cb ? 0 : 1);
3959 }
3960 if (cb && r0kh_wildcard &&
3961 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
3962 /* wildcard: r0kh-id unknown or changed addr -> do a seq req */
3963 seq_ret = FT_RRB_SEQ_DEFER;
3964 }
3965
3966 if (seq_ret == FT_RRB_SEQ_DROP)
3967 goto out;
3968
3969 if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len,
3970 src_addr, type, &plain, &plain_len) < 0)
3971 goto out;
3972
3973 if (!r0kh)
3974 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, src_addr,
3975 f_r0kh_id, f_r0kh_id_len,
3976 wpa_auth->conf.rkh_pos_timeout);
3977 if (!r0kh)
3978 goto out;
3979
3980 if (seq_ret == FT_RRB_SEQ_DEFER) {
3981 wpa_ft_rrb_seq_req(wpa_auth, r0kh->seq, src_addr, f_r0kh_id,
3982 f_r0kh_id_len, f_r1kh_id, key, key_len,
3983 enc, enc_len, auth, auth_len, cb);
3984 goto out;
3985 }
3986
3987 wpa_ft_rrb_seq_accept(wpa_auth, r0kh->seq, src_addr, auth, auth_len,
3988 msgtype);
3989 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
3990 wpa_auth->conf.rkh_pos_timeout);
3991
3992 RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN);
3993 wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id));
3994
3995 if (s1kh_id_out)
3996 os_memcpy(s1kh_id_out, f_s1kh_id, ETH_ALEN);
3997
3998 ret = -2;
3999 RRB_GET(FT_RRB_PAIRWISE, pairwise, msgtype, sizeof(le16));
4000 wpa_hexdump(MSG_DEBUG, "FT: pairwise", f_pairwise, f_pairwise_len);
4001
4002 ret = -1;
4003 RRB_GET(FT_RRB_PMK_R1_NAME, pmk_r1_name, msgtype, WPA_PMK_NAME_LEN);
4004 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
4005 f_pmk_r1_name, WPA_PMK_NAME_LEN);
4006
4007 pmk_r1_len = PMK_LEN;
4008 if (wpa_ft_rrb_get_tlv(plain, plain_len, FT_RRB_PMK_R1, &f_pmk_r1_len,
4009 &f_pmk_r1) == 0 &&
4010 (f_pmk_r1_len == PMK_LEN || f_pmk_r1_len == SHA384_MAC_LEN))
4011 pmk_r1_len = f_pmk_r1_len;
4012 RRB_GET(FT_RRB_PMK_R1, pmk_r1, msgtype, pmk_r1_len);
4013 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f_pmk_r1, pmk_r1_len);
4014
4015 pairwise = WPA_GET_LE16(f_pairwise);
4016
4017 RRB_GET_OPTIONAL(FT_RRB_EXPIRES_IN, expires_in, msgtype,
4018 sizeof(le16));
4019 if (f_expires_in)
4020 expires_in = WPA_GET_LE16(f_expires_in);
4021 else
4022 expires_in = 0;
4023
4024 wpa_printf(MSG_DEBUG, "FT: PMK-R1 %s - expires_in=%d", msgtype,
4025 expires_in);
4026
4027 if (wpa_ft_rrb_get_tlv_vlan(plain, plain_len, &vlan) < 0) {
4028 wpa_printf(MSG_DEBUG, "FT: Cannot parse vlan");
4029 wpa_ft_rrb_dump(plain, plain_len);
4030 goto out;
4031 }
4032
4033 wpa_printf(MSG_DEBUG, "FT: vlan %d%s",
4034 le_to_host16(vlan.untagged), vlan.tagged[0] ? "+" : "");
4035
4036 RRB_GET_OPTIONAL(FT_RRB_IDENTITY, identity, msgtype, -1);
4037 if (f_identity)
4038 wpa_hexdump_ascii(MSG_DEBUG, "FT: Identity", f_identity,
4039 f_identity_len);
4040
4041 RRB_GET_OPTIONAL(FT_RRB_RADIUS_CUI, radius_cui, msgtype, -1);
4042 if (f_radius_cui)
4043 wpa_hexdump_ascii(MSG_DEBUG, "FT: CUI", f_radius_cui,
4044 f_radius_cui_len);
4045
4046 RRB_GET_OPTIONAL(FT_RRB_SESSION_TIMEOUT, session_timeout, msgtype,
4047 sizeof(le32));
4048 if (f_session_timeout)
4049 session_timeout = WPA_GET_LE32(f_session_timeout);
4050 else
4051 session_timeout = 0;
4052 wpa_printf(MSG_DEBUG, "FT: session_timeout %d", session_timeout);
4053
4054 if (wpa_ft_store_pmk_r1(wpa_auth, f_s1kh_id, f_pmk_r1, pmk_r1_len,
4055 f_pmk_r1_name,
4056 pairwise, &vlan, expires_in, session_timeout,
4057 f_identity, f_identity_len, f_radius_cui,
4058 f_radius_cui_len) < 0)
4059 goto out;
4060
4061 ret = 0;
4062 out:
4063 bin_clear_free(plain, plain_len);
4064
4065 return ret;
4066
4067 }
4068
4069
ft_finish_pull(struct wpa_state_machine * sm)4070 static void ft_finish_pull(struct wpa_state_machine *sm)
4071 {
4072 int res;
4073 u8 *resp_ies;
4074 size_t resp_ies_len;
4075 u16 status;
4076
4077 if (!sm->ft_pending_cb || !sm->ft_pending_req_ies)
4078 return;
4079
4080 res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
4081 wpabuf_len(sm->ft_pending_req_ies),
4082 &resp_ies, &resp_ies_len);
4083 if (res < 0) {
4084 /* this loop is broken by ft_pending_pull_left_retries */
4085 wpa_printf(MSG_DEBUG,
4086 "FT: Callback postponed until response is available");
4087 return;
4088 }
4089 wpabuf_free(sm->ft_pending_req_ies);
4090 sm->ft_pending_req_ies = NULL;
4091 status = res;
4092 wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
4093 " - status %u", MAC2STR(sm->addr), status);
4094
4095 sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
4096 sm->ft_pending_auth_transaction + 1, status,
4097 resp_ies, resp_ies_len);
4098 os_free(resp_ies);
4099 }
4100
4101
4102 struct ft_get_sta_ctx {
4103 const u8 *nonce;
4104 const u8 *s1kh_id;
4105 struct wpa_state_machine *sm;
4106 };
4107
4108
ft_get_sta_cb(struct wpa_state_machine * sm,void * ctx)4109 static int ft_get_sta_cb(struct wpa_state_machine *sm, void *ctx)
4110 {
4111 struct ft_get_sta_ctx *info = ctx;
4112
4113 if ((info->s1kh_id &&
4114 os_memcmp(info->s1kh_id, sm->addr, ETH_ALEN) != 0) ||
4115 os_memcmp(info->nonce, sm->ft_pending_pull_nonce,
4116 FT_RRB_NONCE_LEN) != 0 ||
4117 sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
4118 return 0;
4119
4120 info->sm = sm;
4121
4122 return 1;
4123 }
4124
4125
wpa_ft_rrb_rx_resp(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer)4126 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
4127 const u8 *src_addr,
4128 const u8 *enc, size_t enc_len,
4129 const u8 *auth, size_t auth_len,
4130 int no_defer)
4131 {
4132 const char *msgtype = "pull response";
4133 int nak, ret = -1;
4134 struct ft_get_sta_ctx ctx;
4135 u8 s1kh_id[ETH_ALEN];
4136 const u8 *f_nonce;
4137 size_t f_nonce_len;
4138
4139 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
4140
4141 RRB_GET_AUTH(FT_RRB_NONCE, nonce, msgtype, FT_RRB_NONCE_LEN);
4142 wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len);
4143
4144 os_memset(&ctx, 0, sizeof(ctx));
4145 ctx.nonce = f_nonce;
4146 if (!wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
4147 /* nonce not found */
4148 wpa_printf(MSG_DEBUG, "FT: Invalid nonce");
4149 return -1;
4150 }
4151
4152 ret = wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_RESP,
4153 enc, enc_len, auth, auth_len, msgtype, s1kh_id,
4154 no_defer ? NULL : &wpa_ft_rrb_rx_resp);
4155 if (ret == -2) {
4156 ret = 0;
4157 nak = 1;
4158 } else {
4159 nak = 0;
4160 }
4161 if (ret < 0)
4162 return -1;
4163
4164 ctx.s1kh_id = s1kh_id;
4165 if (wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) {
4166 wpa_printf(MSG_DEBUG,
4167 "FT: Response to a pending pull request for " MACSTR,
4168 MAC2STR(ctx.sm->addr));
4169 eloop_cancel_timeout(wpa_ft_expire_pull, ctx.sm, NULL);
4170 if (nak)
4171 ctx.sm->ft_pending_pull_left_retries = 0;
4172 ft_finish_pull(ctx.sm);
4173 }
4174
4175 out:
4176 return ret;
4177 }
4178
4179
wpa_ft_rrb_rx_push(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer)4180 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
4181 const u8 *src_addr,
4182 const u8 *enc, size_t enc_len,
4183 const u8 *auth, size_t auth_len, int no_defer)
4184 {
4185 const char *msgtype = "push";
4186
4187 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
4188
4189 if (wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_PUSH,
4190 enc, enc_len, auth, auth_len, msgtype, NULL,
4191 no_defer ? NULL : wpa_ft_rrb_rx_push) < 0)
4192 return -1;
4193
4194 return 0;
4195 }
4196
4197
wpa_ft_rrb_rx_seq(struct wpa_authenticator * wpa_auth,const u8 * src_addr,int type,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,struct ft_remote_seq ** rkh_seq,u8 ** key,size_t * key_len,struct ft_remote_r0kh ** r0kh_out,struct ft_remote_r1kh ** r1kh_out,struct ft_remote_r0kh ** r0kh_wildcard_out,struct ft_remote_r1kh ** r1kh_wildcard_out)4198 static int wpa_ft_rrb_rx_seq(struct wpa_authenticator *wpa_auth,
4199 const u8 *src_addr, int type,
4200 const u8 *enc, size_t enc_len,
4201 const u8 *auth, size_t auth_len,
4202 struct ft_remote_seq **rkh_seq,
4203 u8 **key, size_t *key_len,
4204 struct ft_remote_r0kh **r0kh_out,
4205 struct ft_remote_r1kh **r1kh_out,
4206 struct ft_remote_r0kh **r0kh_wildcard_out,
4207 struct ft_remote_r1kh **r1kh_wildcard_out)
4208 {
4209 struct ft_remote_r0kh *r0kh = NULL;
4210 struct ft_remote_r1kh *r1kh = NULL;
4211 const u8 *f_r0kh_id, *f_r1kh_id;
4212 size_t f_r0kh_id_len, f_r1kh_id_len;
4213 int to_r0kh, to_r1kh;
4214 u8 *plain = NULL;
4215 size_t plain_len = 0;
4216 struct ft_remote_r0kh *r0kh_wildcard;
4217 struct ft_remote_r1kh *r1kh_wildcard;
4218
4219 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4220 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4221
4222 to_r0kh = !wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len);
4223 to_r1kh = !wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id);
4224
4225 if (to_r0kh && to_r1kh) {
4226 wpa_printf(MSG_DEBUG, "FT: seq - local R0KH-ID and R1KH-ID");
4227 goto out;
4228 }
4229
4230 if (!to_r0kh && !to_r1kh) {
4231 wpa_printf(MSG_DEBUG, "FT: seq - remote R0KH-ID and R1KH-ID");
4232 goto out;
4233 }
4234
4235 if (!to_r0kh) {
4236 wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len,
4237 &r0kh, &r0kh_wildcard);
4238 if (!r0kh_wildcard &&
4239 (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) {
4240 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
4241 f_r0kh_id, f_r0kh_id_len);
4242 goto out;
4243 }
4244 if (r0kh) {
4245 *key = r0kh->key;
4246 *key_len = sizeof(r0kh->key);
4247 } else {
4248 *key = r0kh_wildcard->key;
4249 *key_len = sizeof(r0kh_wildcard->key);
4250 }
4251 }
4252
4253 if (!to_r1kh) {
4254 wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh,
4255 &r1kh_wildcard);
4256 if (!r1kh_wildcard &&
4257 (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) {
4258 wpa_hexdump(MSG_DEBUG, "FT: Did not find R1KH-ID",
4259 f_r1kh_id, FT_R1KH_ID_LEN);
4260 goto out;
4261 }
4262 if (r1kh) {
4263 *key = r1kh->key;
4264 *key_len = sizeof(r1kh->key);
4265 } else {
4266 *key = r1kh_wildcard->key;
4267 *key_len = sizeof(r1kh_wildcard->key);
4268 }
4269 }
4270
4271 if (wpa_ft_rrb_decrypt(*key, *key_len, enc, enc_len, auth, auth_len,
4272 src_addr, type, &plain, &plain_len) < 0)
4273 goto out;
4274
4275 os_free(plain);
4276
4277 if (!to_r0kh) {
4278 if (!r0kh)
4279 r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard,
4280 src_addr, f_r0kh_id,
4281 f_r0kh_id_len,
4282 ftRRBseqTimeout);
4283 if (!r0kh)
4284 goto out;
4285
4286 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, ftRRBseqTimeout);
4287 *rkh_seq = r0kh->seq;
4288 if (r0kh_out)
4289 *r0kh_out = r0kh;
4290 if (r0kh_wildcard_out)
4291 *r0kh_wildcard_out = r0kh_wildcard;
4292 }
4293
4294 if (!to_r1kh) {
4295 if (!r1kh)
4296 r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard,
4297 src_addr, f_r1kh_id,
4298 ftRRBseqTimeout);
4299 if (!r1kh)
4300 goto out;
4301
4302 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, ftRRBseqTimeout);
4303 *rkh_seq = r1kh->seq;
4304 if (r1kh_out)
4305 *r1kh_out = r1kh;
4306 if (r1kh_wildcard_out)
4307 *r1kh_wildcard_out = r1kh_wildcard;
4308 }
4309
4310 return 0;
4311 out:
4312 return -1;
4313 }
4314
4315
wpa_ft_rrb_rx_seq_req(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer)4316 static int wpa_ft_rrb_rx_seq_req(struct wpa_authenticator *wpa_auth,
4317 const u8 *src_addr,
4318 const u8 *enc, size_t enc_len,
4319 const u8 *auth, size_t auth_len,
4320 int no_defer)
4321 {
4322 int ret = -1;
4323 struct ft_rrb_seq f_seq;
4324 const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id;
4325 size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len;
4326 struct ft_remote_seq *rkh_seq = NULL;
4327 u8 *packet = NULL, *key = NULL;
4328 size_t packet_len = 0, key_len = 0;
4329 struct tlv_list seq_resp_auth[5];
4330
4331 wpa_printf(MSG_DEBUG, "FT: Received sequence number request");
4332
4333 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ,
4334 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4335 &key_len, NULL, NULL, NULL, NULL) < 0)
4336 goto out;
4337
4338 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq request", FT_RRB_NONCE_LEN);
4339 wpa_hexdump(MSG_DEBUG, "FT: seq request - nonce", f_nonce, f_nonce_len);
4340
4341 RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1);
4342 RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN);
4343
4344 if (wpa_ft_new_seq(rkh_seq, &f_seq) < 0) {
4345 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4346 goto out;
4347 }
4348
4349 wpa_printf(MSG_DEBUG, "FT: Send sequence number response from " MACSTR
4350 " to " MACSTR,
4351 MAC2STR(wpa_auth->addr), MAC2STR(src_addr));
4352
4353 seq_resp_auth[0].type = FT_RRB_NONCE;
4354 seq_resp_auth[0].len = f_nonce_len;
4355 seq_resp_auth[0].data = f_nonce;
4356 seq_resp_auth[1].type = FT_RRB_SEQ;
4357 seq_resp_auth[1].len = sizeof(f_seq);
4358 seq_resp_auth[1].data = (u8 *) &f_seq;
4359 seq_resp_auth[2].type = FT_RRB_R0KH_ID;
4360 seq_resp_auth[2].len = f_r0kh_id_len;
4361 seq_resp_auth[2].data = f_r0kh_id;
4362 seq_resp_auth[3].type = FT_RRB_R1KH_ID;
4363 seq_resp_auth[3].len = FT_R1KH_ID_LEN;
4364 seq_resp_auth[3].data = f_r1kh_id;
4365 seq_resp_auth[4].type = FT_RRB_LAST_EMPTY;
4366 seq_resp_auth[4].len = 0;
4367 seq_resp_auth[4].data = NULL;
4368
4369 if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_resp_auth, NULL,
4370 wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4371 &packet, &packet_len) < 0)
4372 goto out;
4373
4374 wpa_ft_rrb_oui_send(wpa_auth, src_addr,
4375 FT_PACKET_R0KH_R1KH_SEQ_RESP, packet,
4376 packet_len);
4377
4378 out:
4379 os_free(packet);
4380
4381 return ret;
4382 }
4383
4384
wpa_ft_rrb_rx_seq_resp(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * enc,size_t enc_len,const u8 * auth,size_t auth_len,int no_defer)4385 static int wpa_ft_rrb_rx_seq_resp(struct wpa_authenticator *wpa_auth,
4386 const u8 *src_addr,
4387 const u8 *enc, size_t enc_len,
4388 const u8 *auth, size_t auth_len,
4389 int no_defer)
4390 {
4391 u8 *key = NULL;
4392 size_t key_len = 0;
4393 struct ft_remote_r0kh *r0kh = NULL, *r0kh_wildcard = NULL;
4394 struct ft_remote_r1kh *r1kh = NULL, *r1kh_wildcard = NULL;
4395 const u8 *f_nonce, *f_seq;
4396 size_t f_nonce_len, f_seq_len;
4397 struct ft_remote_seq *rkh_seq = NULL;
4398 struct ft_remote_item *item;
4399 struct os_reltime now, now_remote;
4400 int seq_ret, found;
4401 const struct ft_rrb_seq *msg_both;
4402 u32 msg_dom, msg_seq;
4403
4404 wpa_printf(MSG_DEBUG, "FT: Received sequence number response");
4405
4406 if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_RESP,
4407 enc, enc_len, auth, auth_len, &rkh_seq, &key,
4408 &key_len, &r0kh, &r1kh, &r0kh_wildcard,
4409 &r1kh_wildcard) < 0)
4410 goto out;
4411
4412 RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq response", FT_RRB_NONCE_LEN);
4413 wpa_hexdump(MSG_DEBUG, "FT: seq response - nonce", f_nonce,
4414 f_nonce_len);
4415
4416 found = 0;
4417 dl_list_for_each(item, &rkh_seq->rx.queue, struct ft_remote_item,
4418 list) {
4419 if (os_memcmp_const(f_nonce, item->nonce,
4420 FT_RRB_NONCE_LEN) != 0 ||
4421 os_get_reltime(&now) < 0 ||
4422 os_reltime_expired(&now, &item->nonce_ts, ftRRBseqTimeout))
4423 continue;
4424
4425 found = 1;
4426 break;
4427 }
4428 if (!found) {
4429 wpa_printf(MSG_DEBUG, "FT: seq response - bad nonce");
4430 goto out;
4431 }
4432
4433 if (r0kh) {
4434 wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh,
4435 wpa_auth->conf.rkh_pos_timeout);
4436 if (r0kh_wildcard)
4437 os_memcpy(r0kh->addr, src_addr, ETH_ALEN);
4438 }
4439
4440 if (r1kh) {
4441 wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh,
4442 wpa_auth->conf.rkh_pos_timeout);
4443 if (r1kh_wildcard)
4444 os_memcpy(r1kh->addr, src_addr, ETH_ALEN);
4445 }
4446
4447 seq_ret = wpa_ft_rrb_seq_chk(rkh_seq, src_addr, enc, enc_len, auth,
4448 auth_len, "seq response", 1);
4449 if (seq_ret == FT_RRB_SEQ_OK) {
4450 wpa_printf(MSG_DEBUG, "FT: seq response - valid seq number");
4451 wpa_ft_rrb_seq_accept(wpa_auth, rkh_seq, src_addr, auth,
4452 auth_len, "seq response");
4453 } else {
4454 wpa_printf(MSG_DEBUG, "FT: seq response - reset seq number");
4455
4456 RRB_GET_AUTH(FT_RRB_SEQ, seq, "seq response",
4457 sizeof(*msg_both));
4458 msg_both = (const struct ft_rrb_seq *) f_seq;
4459
4460 msg_dom = le_to_host32(msg_both->dom);
4461 msg_seq = le_to_host32(msg_both->seq);
4462 now_remote.sec = le_to_host32(msg_both->ts);
4463 now_remote.usec = 0;
4464
4465 rkh_seq->rx.num_last = 2;
4466 rkh_seq->rx.dom = msg_dom;
4467 rkh_seq->rx.offsetidx = 0;
4468 /* Accept some older, possibly cached packets as well */
4469 rkh_seq->rx.last[0] = msg_seq - FT_REMOTE_SEQ_BACKLOG -
4470 dl_list_len(&rkh_seq->rx.queue);
4471 rkh_seq->rx.last[1] = msg_seq;
4472
4473 /* local time - offset = remote time
4474 * <=> local time - remote time = offset */
4475 os_reltime_sub(&now, &now_remote, &rkh_seq->rx.time_offset);
4476 }
4477
4478 wpa_ft_rrb_seq_flush(wpa_auth, rkh_seq, 1);
4479
4480 return 0;
4481 out:
4482 return -1;
4483 }
4484
4485
wpa_ft_rrb_rx(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * data,size_t data_len)4486 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4487 const u8 *data, size_t data_len)
4488 {
4489 struct ft_rrb_frame *frame;
4490 u16 alen;
4491 const u8 *pos, *end, *start;
4492 u8 action;
4493 const u8 *sta_addr, *target_ap_addr;
4494
4495 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
4496 MAC2STR(src_addr));
4497
4498 if (data_len < sizeof(*frame)) {
4499 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
4500 (unsigned long) data_len);
4501 return -1;
4502 }
4503
4504 pos = data;
4505 frame = (struct ft_rrb_frame *) pos;
4506 pos += sizeof(*frame);
4507
4508 alen = le_to_host16(frame->action_length);
4509 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
4510 "action_length=%d ap_address=" MACSTR,
4511 frame->frame_type, frame->packet_type, alen,
4512 MAC2STR(frame->ap_address));
4513
4514 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
4515 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
4516 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
4517 "unrecognized type %d", frame->frame_type);
4518 return -1;
4519 }
4520
4521 if (alen > data_len - sizeof(*frame)) {
4522 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
4523 "frame");
4524 return -1;
4525 }
4526
4527 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
4528
4529 if (alen < 1 + 1 + 2 * ETH_ALEN) {
4530 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
4531 "room for Action Frame body); alen=%lu",
4532 (unsigned long) alen);
4533 return -1;
4534 }
4535 start = pos;
4536 end = pos + alen;
4537
4538 if (*pos != WLAN_ACTION_FT) {
4539 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
4540 "%d", *pos);
4541 return -1;
4542 }
4543
4544 pos++;
4545 action = *pos++;
4546 sta_addr = pos;
4547 pos += ETH_ALEN;
4548 target_ap_addr = pos;
4549 pos += ETH_ALEN;
4550 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
4551 MACSTR " target_ap_addr=" MACSTR,
4552 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
4553
4554 if (frame->packet_type == FT_PACKET_REQUEST) {
4555 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
4556
4557 if (action != 1) {
4558 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
4559 "RRB Request", action);
4560 return -1;
4561 }
4562
4563 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
4564 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
4565 "RRB Request does not match with own "
4566 "address");
4567 return -1;
4568 }
4569
4570 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
4571 sta_addr, pos, end - pos) < 0)
4572 return -1;
4573 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
4574 u16 status_code;
4575
4576 if (end - pos < 2) {
4577 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
4578 "code in RRB Response");
4579 return -1;
4580 }
4581 status_code = WPA_GET_LE16(pos);
4582
4583 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
4584 "(status_code=%d)", status_code);
4585
4586 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
4587 return -1;
4588 } else {
4589 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
4590 "packet_type %d", frame->packet_type);
4591 return -1;
4592 }
4593
4594 return 0;
4595 }
4596
4597
wpa_ft_rrb_oui_rx(struct wpa_authenticator * wpa_auth,const u8 * src_addr,const u8 * dst_addr,u8 oui_suffix,const u8 * data,size_t data_len)4598 void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
4599 const u8 *dst_addr, u8 oui_suffix, const u8 *data,
4600 size_t data_len)
4601 {
4602 const u8 *auth, *enc;
4603 size_t alen, elen;
4604 int no_defer = 0;
4605
4606 wpa_printf(MSG_DEBUG, "FT: RRB-OUI(" MACSTR
4607 ") received frame from remote AP "
4608 MACSTR " oui_suffix=%u dst=" MACSTR,
4609 MAC2STR(wpa_auth->addr), MAC2STR(src_addr), oui_suffix,
4610 MAC2STR(dst_addr));
4611 wpa_hexdump(MSG_MSGDUMP, "FT: RRB frame payload", data, data_len);
4612
4613 if (is_multicast_ether_addr(src_addr)) {
4614 wpa_printf(MSG_DEBUG,
4615 "FT: RRB-OUI received frame from multicast address "
4616 MACSTR, MAC2STR(src_addr));
4617 return;
4618 }
4619
4620 if (is_multicast_ether_addr(dst_addr))
4621 no_defer = 1;
4622
4623 if (data_len < sizeof(u16)) {
4624 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4625 return;
4626 }
4627
4628 alen = WPA_GET_LE16(data);
4629 if (data_len < sizeof(u16) + alen) {
4630 wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short");
4631 return;
4632 }
4633
4634 auth = data + sizeof(u16);
4635 wpa_hexdump(MSG_MSGDUMP, "FT: Authenticated payload", auth, alen);
4636 enc = data + sizeof(u16) + alen;
4637 elen = data_len - sizeof(u16) - alen;
4638 wpa_hexdump(MSG_MSGDUMP, "FT: Encrypted payload", enc, elen);
4639
4640 switch (oui_suffix) {
4641 case FT_PACKET_R0KH_R1KH_PULL:
4642 wpa_ft_rrb_rx_pull(wpa_auth, src_addr, enc, elen, auth, alen,
4643 no_defer);
4644 break;
4645 case FT_PACKET_R0KH_R1KH_RESP:
4646 wpa_ft_rrb_rx_resp(wpa_auth, src_addr, enc, elen, auth, alen,
4647 no_defer);
4648 break;
4649 case FT_PACKET_R0KH_R1KH_PUSH:
4650 wpa_ft_rrb_rx_push(wpa_auth, src_addr, enc, elen, auth, alen,
4651 no_defer);
4652 break;
4653 case FT_PACKET_R0KH_R1KH_SEQ_REQ:
4654 wpa_ft_rrb_rx_seq_req(wpa_auth, src_addr, enc, elen, auth, alen,
4655 no_defer);
4656 break;
4657 case FT_PACKET_R0KH_R1KH_SEQ_RESP:
4658 wpa_ft_rrb_rx_seq_resp(wpa_auth, src_addr, enc, elen, auth,
4659 alen, no_defer);
4660 break;
4661 }
4662 }
4663
4664
wpa_ft_generate_pmk_r1(struct wpa_authenticator * wpa_auth,struct wpa_ft_pmk_r0_sa * pmk_r0,struct ft_remote_r1kh * r1kh,const u8 * s1kh_id)4665 static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
4666 struct wpa_ft_pmk_r0_sa *pmk_r0,
4667 struct ft_remote_r1kh *r1kh,
4668 const u8 *s1kh_id)
4669 {
4670 u8 *packet;
4671 size_t packet_len;
4672 struct ft_rrb_seq f_seq;
4673 struct tlv_list push[] = {
4674 { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN,
4675 .data = s1kh_id },
4676 { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN,
4677 .data = pmk_r0->pmk_r0_name },
4678 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4679 };
4680 struct tlv_list push_auth[] = {
4681 { .type = FT_RRB_SEQ, .len = sizeof(f_seq),
4682 .data = (u8 *) &f_seq },
4683 { .type = FT_RRB_R0KH_ID,
4684 .len = wpa_auth->conf.r0_key_holder_len,
4685 .data = wpa_auth->conf.r0_key_holder },
4686 { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN,
4687 .data = r1kh->id },
4688 { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
4689 };
4690
4691 if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) {
4692 wpa_printf(MSG_DEBUG, "FT: Failed to get seq num");
4693 return -1;
4694 }
4695
4696 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 push from " MACSTR
4697 " to remote R0KH address " MACSTR,
4698 MAC2STR(wpa_auth->addr), MAC2STR(r1kh->addr));
4699
4700 if (wpa_ft_rrb_build_r0(r1kh->key, sizeof(r1kh->key), push, pmk_r0,
4701 r1kh->id, s1kh_id, push_auth, wpa_auth->addr,
4702 FT_PACKET_R0KH_R1KH_PUSH,
4703 &packet, &packet_len) < 0)
4704 return -1;
4705
4706 wpa_ft_rrb_oui_send(wpa_auth, r1kh->addr, FT_PACKET_R0KH_R1KH_PUSH,
4707 packet, packet_len);
4708
4709 os_free(packet);
4710 return 0;
4711 }
4712
4713
wpa_ft_push_pmk_r1(struct wpa_authenticator * wpa_auth,const u8 * addr)4714 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
4715 {
4716 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
4717 struct wpa_ft_pmk_r0_sa *r0, *r0found = NULL;
4718 struct ft_remote_r1kh *r1kh;
4719
4720 if (!wpa_auth->conf.pmk_r1_push)
4721 return;
4722 if (!wpa_auth->conf.r1kh_list)
4723 return;
4724
4725 dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
4726 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) {
4727 r0found = r0;
4728 break;
4729 }
4730 }
4731
4732 r0 = r0found;
4733 if (r0 == NULL || r0->pmk_r1_pushed)
4734 return;
4735 r0->pmk_r1_pushed = 1;
4736
4737 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
4738 "for STA " MACSTR, MAC2STR(addr));
4739
4740 for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
4741 if (is_zero_ether_addr(r1kh->addr) ||
4742 is_zero_ether_addr(r1kh->id))
4743 continue;
4744 if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0)
4745 continue;
4746 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
4747 }
4748 }
4749
4750 #endif /* CONFIG_IEEE80211R_AP */
4751