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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * hostapd - IEEE 802.11r - Fast BSS Transition | |
c22bb5bb | 3 | * Copyright (c) 2004-2018, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
6226e38d | 9 | #include "utils/includes.h" |
6fc6879b | 10 | |
6226e38d | 11 | #include "utils/common.h" |
692ec305 | 12 | #include "utils/eloop.h" |
76967603 | 13 | #include "utils/list.h" |
81f4f619 JM |
14 | #include "common/ieee802_11_defs.h" |
15 | #include "common/ieee802_11_common.h" | |
245fc96e MB |
16 | #include "crypto/aes.h" |
17 | #include "crypto/aes_siv.h" | |
03da66bd | 18 | #include "crypto/aes_wrap.h" |
a3e18dbb | 19 | #include "crypto/sha384.h" |
3642c431 | 20 | #include "crypto/random.h" |
6226e38d | 21 | #include "ap_config.h" |
6fc6879b | 22 | #include "ieee802_11.h" |
1057d78e | 23 | #include "wmm.h" |
6226e38d | 24 | #include "wpa_auth.h" |
6fc6879b | 25 | #include "wpa_auth_i.h" |
6fc6879b JM |
26 | |
27 | ||
4ec1fd8e | 28 | #ifdef CONFIG_IEEE80211R_AP |
6fc6879b | 29 | |
eefe8630 MB |
30 | const unsigned int ftRRBseqTimeout = 10; |
31 | const unsigned int ftRRBmaxQueueLen = 100; | |
32 | ||
33 | ||
692ec305 JM |
34 | static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm, |
35 | const u8 *current_ap, const u8 *sta_addr, | |
36 | u16 status, const u8 *resp_ies, | |
37 | size_t resp_ies_len); | |
3a46cf93 MB |
38 | static void ft_finish_pull(struct wpa_state_machine *sm); |
39 | static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx); | |
eefe8630 | 40 | static void wpa_ft_rrb_seq_timeout(void *eloop_ctx, void *timeout_ctx); |
692ec305 | 41 | |
245fc96e MB |
42 | struct tlv_list { |
43 | u16 type; | |
44 | size_t len; | |
45 | const u8 *data; | |
46 | }; | |
47 | ||
48 | ||
49 | /** | |
50 | * wpa_ft_rrb_decrypt - Decrypt FT RRB message | |
51 | * @key: AES-SIV key for AEAD | |
52 | * @key_len: Length of key in octets | |
53 | * @enc: Pointer to encrypted TLVs | |
54 | * @enc_len: Length of encrypted TLVs in octets | |
55 | * @auth: Pointer to authenticated TLVs | |
56 | * @auth_len: Length of authenticated TLVs in octets | |
57 | * @src_addr: MAC address of the frame sender | |
58 | * @type: Vendor-specific subtype of the RRB frame (FT_PACKET_*) | |
59 | * @plain: Pointer to return the pointer to the allocated plaintext buffer; | |
60 | * needs to be freed by the caller if not NULL; | |
61 | * will only be returned on success | |
62 | * @plain_len: Pointer to return the length of the allocated plaintext buffer | |
63 | * in octets | |
64 | * Returns: 0 on success, -1 on error | |
65 | */ | |
66 | static int wpa_ft_rrb_decrypt(const u8 *key, const size_t key_len, | |
67 | const u8 *enc, const size_t enc_len, | |
68 | const u8 *auth, const size_t auth_len, | |
69 | const u8 *src_addr, u8 type, | |
70 | u8 **plain, size_t *plain_size) | |
71 | { | |
72 | const u8 *ad[3] = { src_addr, auth, &type }; | |
73 | size_t ad_len[3] = { ETH_ALEN, auth_len, sizeof(type) }; | |
74 | ||
75 | wpa_hexdump_key(MSG_DEBUG, "FT(RRB): decrypt using key", key, key_len); | |
76 | ||
77 | if (!key) { /* skip decryption */ | |
78 | *plain = os_memdup(enc, enc_len); | |
79 | if (enc_len > 0 && !*plain) | |
80 | goto err; | |
81 | ||
82 | *plain_size = enc_len; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
87 | *plain = NULL; | |
88 | ||
89 | /* SIV overhead */ | |
90 | if (enc_len < AES_BLOCK_SIZE) | |
91 | goto err; | |
92 | ||
93 | *plain = os_zalloc(enc_len - AES_BLOCK_SIZE); | |
94 | if (!*plain) | |
95 | goto err; | |
96 | ||
97 | if (aes_siv_decrypt(key, key_len, enc, enc_len, 3, ad, ad_len, | |
98 | *plain) < 0) | |
99 | goto err; | |
100 | ||
101 | *plain_size = enc_len - AES_BLOCK_SIZE; | |
102 | wpa_hexdump_key(MSG_DEBUG, "FT(RRB): decrypted TLVs", | |
103 | *plain, *plain_size); | |
104 | return 0; | |
105 | err: | |
106 | os_free(*plain); | |
107 | *plain = NULL; | |
108 | *plain_size = 0; | |
109 | ||
110 | wpa_printf(MSG_ERROR, "FT(RRB): Failed to decrypt"); | |
111 | ||
112 | return -1; | |
113 | } | |
114 | ||
115 | ||
116 | /* get first tlv record in packet matching type | |
117 | * @data (decrypted) packet | |
118 | * @return 0 on success else -1 | |
119 | */ | |
120 | static int wpa_ft_rrb_get_tlv(const u8 *plain, size_t plain_len, | |
121 | u16 type, size_t *tlv_len, const u8 **tlv_data) | |
122 | { | |
123 | const struct ft_rrb_tlv *f; | |
124 | size_t left; | |
125 | le16 type16; | |
126 | size_t len; | |
127 | ||
128 | left = plain_len; | |
129 | type16 = host_to_le16(type); | |
130 | ||
131 | while (left >= sizeof(*f)) { | |
132 | f = (const struct ft_rrb_tlv *) plain; | |
133 | ||
134 | left -= sizeof(*f); | |
135 | plain += sizeof(*f); | |
136 | len = le_to_host16(f->len); | |
137 | ||
138 | if (left < len) { | |
139 | wpa_printf(MSG_DEBUG, "FT: RRB message truncated"); | |
140 | break; | |
141 | } | |
142 | ||
143 | if (f->type == type16) { | |
144 | *tlv_len = len; | |
145 | *tlv_data = plain; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | left -= len; | |
150 | plain += len; | |
151 | } | |
152 | ||
153 | return -1; | |
154 | } | |
155 | ||
156 | ||
157 | static void wpa_ft_rrb_dump(const u8 *plain, const size_t plain_len) | |
158 | { | |
159 | const struct ft_rrb_tlv *f; | |
160 | size_t left; | |
161 | size_t len; | |
162 | ||
163 | left = plain_len; | |
164 | ||
165 | wpa_printf(MSG_DEBUG, "FT: RRB dump message"); | |
166 | while (left >= sizeof(*f)) { | |
167 | f = (const struct ft_rrb_tlv *) plain; | |
168 | ||
169 | left -= sizeof(*f); | |
170 | plain += sizeof(*f); | |
171 | len = le_to_host16(f->len); | |
172 | ||
173 | wpa_printf(MSG_DEBUG, "FT: RRB TLV type = %d, len = %zu", | |
174 | le_to_host16(f->type), len); | |
175 | ||
176 | if (left < len) { | |
177 | wpa_printf(MSG_DEBUG, | |
178 | "FT: RRB message truncated: left %zu bytes, need %zu", | |
179 | left, len); | |
180 | break; | |
181 | } | |
182 | ||
183 | wpa_hexdump(MSG_DEBUG, "FT: RRB TLV data", plain, len); | |
184 | ||
185 | left -= len; | |
186 | plain += len; | |
187 | } | |
188 | ||
189 | if (left > 0) | |
190 | wpa_hexdump(MSG_DEBUG, "FT: RRB TLV padding", plain, left); | |
191 | ||
192 | wpa_printf(MSG_DEBUG, "FT: RRB dump message end"); | |
193 | } | |
194 | ||
195 | ||
17010c38 MB |
196 | static int cmp_int(const void *a, const void *b) |
197 | { | |
198 | int x, y; | |
199 | ||
200 | x = *((int *) a); | |
201 | y = *((int *) b); | |
202 | return x - y; | |
203 | } | |
204 | ||
205 | ||
206 | static int wpa_ft_rrb_get_tlv_vlan(const u8 *plain, const size_t plain_len, | |
207 | struct vlan_description *vlan) | |
208 | { | |
209 | struct ft_rrb_tlv *f; | |
210 | size_t left; | |
211 | size_t len; | |
212 | int taggedidx; | |
213 | int vlan_id; | |
214 | int type; | |
215 | ||
216 | left = plain_len; | |
217 | taggedidx = 0; | |
218 | os_memset(vlan, 0, sizeof(*vlan)); | |
219 | ||
220 | while (left >= sizeof(*f)) { | |
221 | f = (struct ft_rrb_tlv *) plain; | |
222 | ||
223 | left -= sizeof(*f); | |
224 | plain += sizeof(*f); | |
225 | ||
226 | len = le_to_host16(f->len); | |
227 | type = le_to_host16(f->type); | |
228 | ||
229 | if (left < len) { | |
230 | wpa_printf(MSG_DEBUG, "FT: RRB message truncated"); | |
231 | return -1; | |
232 | } | |
233 | ||
234 | if (type != FT_RRB_VLAN_UNTAGGED && type != FT_RRB_VLAN_TAGGED) | |
235 | goto skip; | |
236 | ||
237 | if (type == FT_RRB_VLAN_UNTAGGED && len != sizeof(le16)) { | |
238 | wpa_printf(MSG_DEBUG, | |
239 | "FT: RRB VLAN_UNTAGGED invalid length"); | |
240 | return -1; | |
241 | } | |
242 | ||
243 | if (type == FT_RRB_VLAN_TAGGED && len % sizeof(le16) != 0) { | |
244 | wpa_printf(MSG_DEBUG, | |
245 | "FT: RRB VLAN_TAGGED invalid length"); | |
246 | return -1; | |
247 | } | |
248 | ||
249 | while (len >= sizeof(le16)) { | |
250 | vlan_id = WPA_GET_LE16(plain); | |
251 | plain += sizeof(le16); | |
252 | left -= sizeof(le16); | |
253 | len -= sizeof(le16); | |
254 | ||
255 | if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID) { | |
256 | wpa_printf(MSG_DEBUG, | |
257 | "FT: RRB VLAN ID invalid %d", | |
258 | vlan_id); | |
259 | continue; | |
260 | } | |
261 | ||
262 | if (type == FT_RRB_VLAN_UNTAGGED) | |
263 | vlan->untagged = vlan_id; | |
264 | ||
265 | if (type == FT_RRB_VLAN_TAGGED && | |
266 | taggedidx < MAX_NUM_TAGGED_VLAN) { | |
267 | vlan->tagged[taggedidx] = vlan_id; | |
268 | taggedidx++; | |
269 | } else if (type == FT_RRB_VLAN_TAGGED) { | |
270 | wpa_printf(MSG_DEBUG, "FT: RRB too many VLANs"); | |
271 | } | |
272 | } | |
273 | ||
274 | skip: | |
275 | left -= len; | |
276 | plain += len; | |
277 | } | |
278 | ||
279 | if (taggedidx) | |
280 | qsort(vlan->tagged, taggedidx, sizeof(int), cmp_int); | |
281 | ||
282 | vlan->notempty = vlan->untagged || vlan->tagged[0]; | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | ||
245fc96e MB |
288 | static size_t wpa_ft_tlv_len(const struct tlv_list *tlvs) |
289 | { | |
290 | size_t tlv_len = 0; | |
291 | int i; | |
292 | ||
293 | if (!tlvs) | |
294 | return 0; | |
295 | ||
296 | for (i = 0; tlvs[i].type != FT_RRB_LAST_EMPTY; i++) { | |
297 | tlv_len += sizeof(struct ft_rrb_tlv); | |
298 | tlv_len += tlvs[i].len; | |
299 | } | |
300 | ||
301 | return tlv_len; | |
302 | } | |
303 | ||
304 | ||
305 | static size_t wpa_ft_tlv_lin(const struct tlv_list *tlvs, u8 *start, | |
306 | u8 *endpos) | |
307 | { | |
308 | int i; | |
309 | size_t tlv_len; | |
310 | struct ft_rrb_tlv *hdr; | |
311 | u8 *pos; | |
312 | ||
313 | if (!tlvs) | |
314 | return 0; | |
315 | ||
316 | tlv_len = 0; | |
317 | pos = start; | |
318 | for (i = 0; tlvs[i].type != FT_RRB_LAST_EMPTY; i++) { | |
319 | if (tlv_len + sizeof(*hdr) > (size_t) (endpos - start)) | |
320 | return tlv_len; | |
321 | tlv_len += sizeof(*hdr); | |
322 | hdr = (struct ft_rrb_tlv *) pos; | |
323 | hdr->type = host_to_le16(tlvs[i].type); | |
324 | hdr->len = host_to_le16(tlvs[i].len); | |
325 | pos = start + tlv_len; | |
326 | ||
327 | if (tlv_len + tlvs[i].len > (size_t) (endpos - start)) | |
328 | return tlv_len; | |
069b4e30 MB |
329 | if (tlvs[i].len == 0) |
330 | continue; | |
245fc96e MB |
331 | tlv_len += tlvs[i].len; |
332 | os_memcpy(pos, tlvs[i].data, tlvs[i].len); | |
333 | pos = start + tlv_len; | |
334 | } | |
335 | ||
336 | return tlv_len; | |
337 | } | |
338 | ||
339 | ||
17010c38 MB |
340 | static size_t wpa_ft_vlan_len(const struct vlan_description *vlan) |
341 | { | |
342 | size_t tlv_len = 0; | |
343 | int i; | |
344 | ||
345 | if (!vlan || !vlan->notempty) | |
346 | return 0; | |
347 | ||
348 | if (vlan->untagged) { | |
349 | tlv_len += sizeof(struct ft_rrb_tlv); | |
350 | tlv_len += sizeof(le16); | |
351 | } | |
352 | if (vlan->tagged[0]) | |
353 | tlv_len += sizeof(struct ft_rrb_tlv); | |
354 | for (i = 0; i < MAX_NUM_TAGGED_VLAN && vlan->tagged[i]; i++) | |
355 | tlv_len += sizeof(le16); | |
356 | ||
357 | return tlv_len; | |
358 | } | |
359 | ||
360 | ||
361 | static size_t wpa_ft_vlan_lin(const struct vlan_description *vlan, | |
362 | u8 *start, u8 *endpos) | |
363 | { | |
364 | size_t tlv_len; | |
365 | int i, len; | |
366 | struct ft_rrb_tlv *hdr; | |
367 | u8 *pos = start; | |
368 | ||
369 | if (!vlan || !vlan->notempty) | |
370 | return 0; | |
371 | ||
372 | tlv_len = 0; | |
373 | if (vlan->untagged) { | |
374 | tlv_len += sizeof(*hdr); | |
375 | if (start + tlv_len > endpos) | |
376 | return tlv_len; | |
377 | hdr = (struct ft_rrb_tlv *) pos; | |
378 | hdr->type = host_to_le16(FT_RRB_VLAN_UNTAGGED); | |
379 | hdr->len = host_to_le16(sizeof(le16)); | |
380 | pos = start + tlv_len; | |
381 | ||
382 | tlv_len += sizeof(le16); | |
383 | if (start + tlv_len > endpos) | |
384 | return tlv_len; | |
385 | WPA_PUT_LE16(pos, vlan->untagged); | |
386 | pos = start + tlv_len; | |
387 | } | |
388 | ||
389 | if (!vlan->tagged[0]) | |
390 | return tlv_len; | |
391 | ||
392 | tlv_len += sizeof(*hdr); | |
393 | if (start + tlv_len > endpos) | |
394 | return tlv_len; | |
395 | hdr = (struct ft_rrb_tlv *) pos; | |
396 | hdr->type = host_to_le16(FT_RRB_VLAN_TAGGED); | |
397 | len = 0; /* len is computed below */ | |
398 | pos = start + tlv_len; | |
399 | ||
400 | for (i = 0; i < MAX_NUM_TAGGED_VLAN && vlan->tagged[i]; i++) { | |
401 | tlv_len += sizeof(le16); | |
402 | if (start + tlv_len > endpos) | |
403 | break; | |
404 | len += sizeof(le16); | |
405 | WPA_PUT_LE16(pos, vlan->tagged[i]); | |
406 | pos = start + tlv_len; | |
407 | } | |
408 | ||
409 | hdr->len = host_to_le16(len); | |
410 | ||
411 | return tlv_len; | |
412 | } | |
413 | ||
414 | ||
245fc96e MB |
415 | static int wpa_ft_rrb_lin(const struct tlv_list *tlvs1, |
416 | const struct tlv_list *tlvs2, | |
17010c38 | 417 | const struct vlan_description *vlan, |
245fc96e MB |
418 | u8 **plain, size_t *plain_len) |
419 | { | |
420 | u8 *pos, *endpos; | |
421 | size_t tlv_len; | |
422 | ||
423 | tlv_len = wpa_ft_tlv_len(tlvs1); | |
424 | tlv_len += wpa_ft_tlv_len(tlvs2); | |
17010c38 | 425 | tlv_len += wpa_ft_vlan_len(vlan); |
245fc96e MB |
426 | |
427 | *plain_len = tlv_len; | |
428 | *plain = os_zalloc(tlv_len); | |
429 | if (!*plain) { | |
430 | wpa_printf(MSG_ERROR, "FT: Failed to allocate plaintext"); | |
431 | goto err; | |
432 | } | |
433 | ||
434 | pos = *plain; | |
435 | endpos = *plain + tlv_len; | |
436 | pos += wpa_ft_tlv_lin(tlvs1, pos, endpos); | |
437 | pos += wpa_ft_tlv_lin(tlvs2, pos, endpos); | |
17010c38 | 438 | pos += wpa_ft_vlan_lin(vlan, pos, endpos); |
245fc96e MB |
439 | |
440 | /* sanity check */ | |
441 | if (pos != endpos) { | |
442 | wpa_printf(MSG_ERROR, "FT: Length error building RRB"); | |
443 | goto err; | |
444 | } | |
445 | ||
446 | return 0; | |
447 | ||
448 | err: | |
449 | os_free(*plain); | |
450 | *plain = NULL; | |
451 | *plain_len = 0; | |
452 | return -1; | |
453 | } | |
454 | ||
455 | ||
456 | static int wpa_ft_rrb_encrypt(const u8 *key, const size_t key_len, | |
457 | const u8 *plain, const size_t plain_len, | |
458 | const u8 *auth, const size_t auth_len, | |
459 | const u8 *src_addr, u8 type, u8 *enc) | |
460 | { | |
461 | const u8 *ad[3] = { src_addr, auth, &type }; | |
462 | size_t ad_len[3] = { ETH_ALEN, auth_len, sizeof(type) }; | |
463 | ||
464 | wpa_hexdump_key(MSG_DEBUG, "FT(RRB): plaintext message", | |
465 | plain, plain_len); | |
466 | wpa_hexdump_key(MSG_DEBUG, "FT(RRB): encrypt using key", key, key_len); | |
467 | ||
468 | if (!key) { | |
469 | /* encryption not needed, return plaintext as packet */ | |
470 | os_memcpy(enc, plain, plain_len); | |
471 | } else if (aes_siv_encrypt(key, key_len, plain, plain_len, | |
472 | 3, ad, ad_len, enc) < 0) { | |
473 | wpa_printf(MSG_ERROR, "FT: Failed to encrypt RRB-OUI message"); | |
474 | return -1; | |
475 | } | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | ||
481 | /** | |
482 | * wpa_ft_rrb_build - Build and encrypt an FT RRB message | |
483 | * @key: AES-SIV key for AEAD | |
484 | * @key_len: Length of key in octets | |
485 | * @tlvs_enc0: First set of to-be-encrypted TLVs | |
486 | * @tlvs_enc1: Second set of to-be-encrypted TLVs | |
487 | * @tlvs_auth: Set of to-be-authenticated TLVs | |
488 | * @src_addr: MAC address of the frame sender | |
489 | * @type: Vendor-specific subtype of the RRB frame (FT_PACKET_*) | |
490 | * @packet Pointer to return the pointer to the allocated packet buffer; | |
491 | * needs to be freed by the caller if not null; | |
492 | * will only be returned on success | |
493 | * @packet_len: Pointer to return the length of the allocated buffer in octets | |
494 | * Returns: 0 on success, -1 on error | |
495 | */ | |
496 | static int wpa_ft_rrb_build(const u8 *key, const size_t key_len, | |
497 | const struct tlv_list *tlvs_enc0, | |
498 | const struct tlv_list *tlvs_enc1, | |
499 | const struct tlv_list *tlvs_auth, | |
17010c38 | 500 | const struct vlan_description *vlan, |
245fc96e MB |
501 | const u8 *src_addr, u8 type, |
502 | u8 **packet, size_t *packet_len) | |
503 | { | |
504 | u8 *plain = NULL, *auth = NULL, *pos; | |
505 | size_t plain_len = 0, auth_len = 0; | |
506 | int ret = -1; | |
507 | ||
17010c38 | 508 | if (wpa_ft_rrb_lin(tlvs_enc0, tlvs_enc1, vlan, &plain, &plain_len) < 0) |
245fc96e MB |
509 | goto out; |
510 | ||
17010c38 | 511 | if (wpa_ft_rrb_lin(tlvs_auth, NULL, NULL, &auth, &auth_len) < 0) |
245fc96e MB |
512 | goto out; |
513 | ||
514 | *packet_len = sizeof(u16) + auth_len + plain_len; | |
515 | if (key) | |
516 | *packet_len += AES_BLOCK_SIZE; | |
517 | *packet = os_zalloc(*packet_len); | |
518 | if (!*packet) | |
519 | goto out; | |
520 | ||
521 | pos = *packet; | |
522 | WPA_PUT_LE16(pos, auth_len); | |
523 | pos += 2; | |
524 | os_memcpy(pos, auth, auth_len); | |
525 | pos += auth_len; | |
526 | if (wpa_ft_rrb_encrypt(key, key_len, plain, plain_len, auth, | |
527 | auth_len, src_addr, type, pos) < 0) | |
528 | goto out; | |
529 | ||
530 | ret = 0; | |
531 | ||
532 | out: | |
533 | bin_clear_free(plain, plain_len); | |
534 | os_free(auth); | |
535 | ||
536 | if (ret) { | |
537 | wpa_printf(MSG_ERROR, "FT: Failed to build RRB-OUI message"); | |
538 | os_free(*packet); | |
539 | *packet = NULL; | |
540 | *packet_len = 0; | |
541 | } | |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
546 | ||
547 | #define RRB_GET_SRC(srcfield, type, field, txt, checklength) do { \ | |
548 | if (wpa_ft_rrb_get_tlv(srcfield, srcfield##_len, type, \ | |
549 | &f_##field##_len, &f_##field) < 0 || \ | |
550 | (checklength > 0 && ((size_t) checklength) != f_##field##_len)) { \ | |
551 | wpa_printf(MSG_INFO, "FT: Missing required " #field \ | |
552 | " in %s from " MACSTR, txt, MAC2STR(src_addr)); \ | |
553 | wpa_ft_rrb_dump(srcfield, srcfield##_len); \ | |
554 | goto out; \ | |
555 | } \ | |
556 | } while (0) | |
557 | ||
558 | #define RRB_GET(type, field, txt, checklength) \ | |
559 | RRB_GET_SRC(plain, type, field, txt, checklength) | |
560 | #define RRB_GET_AUTH(type, field, txt, checklength) \ | |
561 | RRB_GET_SRC(auth, type, field, txt, checklength) | |
562 | ||
563 | #define RRB_GET_OPTIONAL_SRC(srcfield, type, field, txt, checklength) do { \ | |
564 | if (wpa_ft_rrb_get_tlv(srcfield, srcfield##_len, type, \ | |
565 | &f_##field##_len, &f_##field) < 0 || \ | |
566 | (checklength > 0 && ((size_t) checklength) != f_##field##_len)) { \ | |
567 | wpa_printf(MSG_DEBUG, "FT: Missing optional " #field \ | |
568 | " in %s from " MACSTR, txt, MAC2STR(src_addr)); \ | |
569 | f_##field##_len = 0; \ | |
570 | f_##field = NULL; \ | |
571 | } \ | |
572 | } while (0) | |
573 | ||
574 | #define RRB_GET_OPTIONAL(type, field, txt, checklength) \ | |
575 | RRB_GET_OPTIONAL_SRC(plain, type, field, txt, checklength) | |
576 | #define RRB_GET_OPTIONAL_AUTH(type, field, txt, checklength) \ | |
577 | RRB_GET_OPTIONAL_SRC(auth, type, field, txt, checklength) | |
692ec305 | 578 | |
6fc6879b JM |
579 | static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst, |
580 | const u8 *data, size_t data_len) | |
581 | { | |
cef8fac0 | 582 | if (wpa_auth->cb->send_ether == NULL) |
6fc6879b | 583 | return -1; |
67ccef7e | 584 | wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst)); |
cef8fac0 JB |
585 | return wpa_auth->cb->send_ether(wpa_auth->cb_ctx, dst, ETH_P_RRB, |
586 | data, data_len); | |
6fc6879b JM |
587 | } |
588 | ||
589 | ||
50bd8e0a MB |
590 | static int wpa_ft_rrb_oui_send(struct wpa_authenticator *wpa_auth, |
591 | const u8 *dst, u8 oui_suffix, | |
592 | const u8 *data, size_t data_len) | |
593 | { | |
594 | if (!wpa_auth->cb->send_oui) | |
595 | return -1; | |
596 | wpa_printf(MSG_DEBUG, "FT: RRB-OUI type %u send to " MACSTR, | |
597 | oui_suffix, MAC2STR(dst)); | |
598 | return wpa_auth->cb->send_oui(wpa_auth->cb_ctx, dst, oui_suffix, data, | |
599 | data_len); | |
600 | } | |
601 | ||
602 | ||
6fc6879b JM |
603 | static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth, |
604 | const u8 *dst, const u8 *data, size_t data_len) | |
605 | { | |
cef8fac0 | 606 | if (wpa_auth->cb->send_ft_action == NULL) |
6fc6879b | 607 | return -1; |
cef8fac0 JB |
608 | return wpa_auth->cb->send_ft_action(wpa_auth->cb_ctx, dst, |
609 | data, data_len); | |
6fc6879b JM |
610 | } |
611 | ||
612 | ||
96590564 MB |
613 | static const u8 * wpa_ft_get_psk(struct wpa_authenticator *wpa_auth, |
614 | const u8 *addr, const u8 *p2p_dev_addr, | |
615 | const u8 *prev_psk) | |
616 | { | |
cef8fac0 | 617 | if (wpa_auth->cb->get_psk == NULL) |
96590564 | 618 | return NULL; |
cef8fac0 | 619 | return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr, |
7a12edd1 | 620 | prev_psk, NULL); |
96590564 MB |
621 | } |
622 | ||
623 | ||
6fc6879b JM |
624 | static struct wpa_state_machine * |
625 | wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr) | |
626 | { | |
cef8fac0 | 627 | if (wpa_auth->cb->add_sta == NULL) |
6fc6879b | 628 | return NULL; |
cef8fac0 | 629 | return wpa_auth->cb->add_sta(wpa_auth->cb_ctx, sta_addr); |
6fc6879b JM |
630 | } |
631 | ||
632 | ||
17010c38 MB |
633 | static int wpa_ft_set_vlan(struct wpa_authenticator *wpa_auth, |
634 | const u8 *sta_addr, struct vlan_description *vlan) | |
635 | { | |
636 | if (!wpa_auth->cb->set_vlan) | |
637 | return -1; | |
638 | return wpa_auth->cb->set_vlan(wpa_auth->cb_ctx, sta_addr, vlan); | |
639 | } | |
640 | ||
641 | ||
642 | static int wpa_ft_get_vlan(struct wpa_authenticator *wpa_auth, | |
643 | const u8 *sta_addr, struct vlan_description *vlan) | |
644 | { | |
645 | if (!wpa_auth->cb->get_vlan) | |
646 | return -1; | |
647 | return wpa_auth->cb->get_vlan(wpa_auth->cb_ctx, sta_addr, vlan); | |
648 | } | |
649 | ||
650 | ||
069b4e30 MB |
651 | static int |
652 | wpa_ft_set_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, | |
653 | const u8 *identity, size_t identity_len) | |
654 | { | |
655 | if (!wpa_auth->cb->set_identity) | |
656 | return -1; | |
657 | return wpa_auth->cb->set_identity(wpa_auth->cb_ctx, sta_addr, identity, | |
658 | identity_len); | |
659 | } | |
660 | ||
661 | ||
662 | static size_t | |
663 | wpa_ft_get_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, | |
664 | const u8 **buf) | |
665 | { | |
666 | *buf = NULL; | |
667 | if (!wpa_auth->cb->get_identity) | |
668 | return 0; | |
669 | return wpa_auth->cb->get_identity(wpa_auth->cb_ctx, sta_addr, buf); | |
670 | } | |
671 | ||
672 | ||
673 | static int | |
674 | wpa_ft_set_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, | |
675 | const u8 *radius_cui, size_t radius_cui_len) | |
676 | { | |
677 | if (!wpa_auth->cb->set_radius_cui) | |
678 | return -1; | |
679 | return wpa_auth->cb->set_radius_cui(wpa_auth->cb_ctx, sta_addr, | |
680 | radius_cui, radius_cui_len); | |
681 | } | |
682 | ||
683 | ||
684 | static size_t | |
685 | wpa_ft_get_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr, | |
686 | const u8 **buf) | |
687 | { | |
688 | *buf = NULL; | |
689 | if (!wpa_auth->cb->get_radius_cui) | |
690 | return 0; | |
691 | return wpa_auth->cb->get_radius_cui(wpa_auth->cb_ctx, sta_addr, buf); | |
692 | } | |
693 | ||
694 | ||
a6509e85 MB |
695 | static void |
696 | wpa_ft_set_session_timeout(struct wpa_authenticator *wpa_auth, | |
697 | const u8 *sta_addr, int session_timeout) | |
698 | { | |
699 | if (!wpa_auth->cb->set_session_timeout) | |
700 | return; | |
701 | wpa_auth->cb->set_session_timeout(wpa_auth->cb_ctx, sta_addr, | |
702 | session_timeout); | |
703 | } | |
704 | ||
705 | ||
706 | static int | |
707 | wpa_ft_get_session_timeout(struct wpa_authenticator *wpa_auth, | |
708 | const u8 *sta_addr) | |
709 | { | |
710 | if (!wpa_auth->cb->get_session_timeout) | |
711 | return 0; | |
712 | return wpa_auth->cb->get_session_timeout(wpa_auth->cb_ctx, sta_addr); | |
713 | } | |
714 | ||
715 | ||
88b32a99 SP |
716 | static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth, |
717 | const u8 *sta_addr, | |
718 | u8 *tspec_ie, size_t tspec_ielen) | |
719 | { | |
cef8fac0 | 720 | if (wpa_auth->cb->add_tspec == NULL) { |
006309b5 | 721 | wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized"); |
88b32a99 SP |
722 | return -1; |
723 | } | |
cef8fac0 JB |
724 | return wpa_auth->cb->add_tspec(wpa_auth->cb_ctx, sta_addr, tspec_ie, |
725 | tspec_ielen); | |
88b32a99 SP |
726 | } |
727 | ||
728 | ||
6fc6879b JM |
729 | int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len) |
730 | { | |
731 | u8 *pos = buf; | |
732 | u8 capab; | |
733 | if (len < 2 + sizeof(struct rsn_mdie)) | |
734 | return -1; | |
735 | ||
736 | *pos++ = WLAN_EID_MOBILITY_DOMAIN; | |
737 | *pos++ = MOBILITY_DOMAIN_ID_LEN + 1; | |
738 | os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN); | |
739 | pos += MOBILITY_DOMAIN_ID_LEN; | |
d7956add SP |
740 | capab = 0; |
741 | if (conf->ft_over_ds) | |
742 | capab |= RSN_FT_CAPAB_FT_OVER_DS; | |
6fc6879b JM |
743 | *pos++ = capab; |
744 | ||
745 | return pos - buf; | |
746 | } | |
747 | ||
748 | ||
86dfabb8 JM |
749 | int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, |
750 | size_t r0kh_id_len, | |
751 | const u8 *anonce, const u8 *snonce, | |
752 | u8 *buf, size_t len, const u8 *subelem, | |
753 | size_t subelem_len) | |
6fc6879b JM |
754 | { |
755 | u8 *pos = buf, *ielen; | |
756 | struct rsn_ftie *hdr; | |
757 | ||
758 | if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len + | |
759 | subelem_len) | |
760 | return -1; | |
761 | ||
762 | *pos++ = WLAN_EID_FAST_BSS_TRANSITION; | |
763 | ielen = pos++; | |
764 | ||
765 | hdr = (struct rsn_ftie *) pos; | |
766 | os_memset(hdr, 0, sizeof(*hdr)); | |
767 | pos += sizeof(*hdr); | |
768 | WPA_PUT_LE16(hdr->mic_control, 0); | |
769 | if (anonce) | |
770 | os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN); | |
771 | if (snonce) | |
772 | os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN); | |
773 | ||
774 | /* Optional Parameters */ | |
775 | *pos++ = FTIE_SUBELEM_R1KH_ID; | |
776 | *pos++ = FT_R1KH_ID_LEN; | |
777 | os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN); | |
778 | pos += FT_R1KH_ID_LEN; | |
779 | ||
780 | if (r0kh_id) { | |
781 | *pos++ = FTIE_SUBELEM_R0KH_ID; | |
782 | *pos++ = r0kh_id_len; | |
783 | os_memcpy(pos, r0kh_id, r0kh_id_len); | |
784 | pos += r0kh_id_len; | |
785 | } | |
786 | ||
787 | if (subelem) { | |
788 | os_memcpy(pos, subelem, subelem_len); | |
789 | pos += subelem_len; | |
790 | } | |
791 | ||
792 | *ielen = pos - buf - 2; | |
793 | ||
794 | return pos - buf; | |
795 | } | |
796 | ||
797 | ||
eefe8630 MB |
798 | /* A packet to be handled after seq response */ |
799 | struct ft_remote_item { | |
800 | struct dl_list list; | |
801 | ||
802 | u8 nonce[FT_RRB_NONCE_LEN]; | |
803 | struct os_reltime nonce_ts; | |
804 | ||
805 | u8 src_addr[ETH_ALEN]; | |
806 | u8 *enc; | |
807 | size_t enc_len; | |
808 | u8 *auth; | |
809 | size_t auth_len; | |
810 | int (*cb)(struct wpa_authenticator *wpa_auth, | |
811 | const u8 *src_addr, | |
812 | const u8 *enc, size_t enc_len, | |
813 | const u8 *auth, size_t auth_len, | |
814 | int no_defer); | |
815 | }; | |
816 | ||
817 | ||
818 | static void wpa_ft_rrb_seq_free(struct ft_remote_item *item) | |
819 | { | |
820 | eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, ELOOP_ALL_CTX, item); | |
821 | dl_list_del(&item->list); | |
822 | bin_clear_free(item->enc, item->enc_len); | |
823 | os_free(item->auth); | |
824 | os_free(item); | |
825 | } | |
826 | ||
827 | ||
828 | static void wpa_ft_rrb_seq_flush(struct wpa_authenticator *wpa_auth, | |
829 | struct ft_remote_seq *rkh_seq, int cb) | |
830 | { | |
831 | struct ft_remote_item *item, *n; | |
832 | ||
833 | dl_list_for_each_safe(item, n, &rkh_seq->rx.queue, | |
834 | struct ft_remote_item, list) { | |
835 | if (cb && item->cb) | |
836 | item->cb(wpa_auth, item->src_addr, item->enc, | |
837 | item->enc_len, item->auth, item->auth_len, 1); | |
838 | wpa_ft_rrb_seq_free(item); | |
839 | } | |
840 | } | |
841 | ||
842 | ||
843 | static void wpa_ft_rrb_seq_timeout(void *eloop_ctx, void *timeout_ctx) | |
844 | { | |
845 | struct ft_remote_item *item = timeout_ctx; | |
846 | ||
847 | wpa_ft_rrb_seq_free(item); | |
848 | } | |
849 | ||
850 | ||
851 | static int | |
852 | wpa_ft_rrb_seq_req(struct wpa_authenticator *wpa_auth, | |
853 | struct ft_remote_seq *rkh_seq, const u8 *src_addr, | |
854 | const u8 *f_r0kh_id, size_t f_r0kh_id_len, | |
855 | const u8 *f_r1kh_id, const u8 *key, size_t key_len, | |
856 | const u8 *enc, size_t enc_len, | |
857 | const u8 *auth, size_t auth_len, | |
858 | int (*cb)(struct wpa_authenticator *wpa_auth, | |
859 | const u8 *src_addr, | |
860 | const u8 *enc, size_t enc_len, | |
861 | const u8 *auth, size_t auth_len, | |
862 | int no_defer)) | |
863 | { | |
864 | struct ft_remote_item *item = NULL; | |
865 | u8 *packet = NULL; | |
866 | size_t packet_len; | |
867 | struct tlv_list seq_req_auth[] = { | |
868 | { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN, | |
869 | .data = NULL /* to be filled: item->nonce */ }, | |
870 | { .type = FT_RRB_R0KH_ID, .len = f_r0kh_id_len, | |
871 | .data = f_r0kh_id }, | |
872 | { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN, | |
873 | .data = f_r1kh_id }, | |
874 | { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL }, | |
875 | }; | |
876 | ||
877 | if (dl_list_len(&rkh_seq->rx.queue) >= ftRRBmaxQueueLen) { | |
878 | wpa_printf(MSG_DEBUG, "FT: Sequence number queue too long"); | |
879 | goto err; | |
880 | } | |
881 | ||
882 | item = os_zalloc(sizeof(*item)); | |
883 | if (!item) | |
884 | goto err; | |
885 | ||
886 | os_memcpy(item->src_addr, src_addr, ETH_ALEN); | |
887 | item->cb = cb; | |
888 | ||
889 | if (random_get_bytes(item->nonce, FT_RRB_NONCE_LEN) < 0) { | |
890 | wpa_printf(MSG_DEBUG, "FT: Seq num nonce: out of random bytes"); | |
891 | goto err; | |
892 | } | |
893 | ||
894 | if (os_get_reltime(&item->nonce_ts) < 0) | |
895 | goto err; | |
896 | ||
897 | if (enc && enc_len > 0) { | |
898 | item->enc = os_memdup(enc, enc_len); | |
899 | item->enc_len = enc_len; | |
900 | if (!item->enc) | |
901 | goto err; | |
902 | } | |
903 | ||
904 | if (auth && auth_len > 0) { | |
905 | item->auth = os_memdup(auth, auth_len); | |
906 | item->auth_len = auth_len; | |
907 | if (!item->auth) | |
908 | goto err; | |
909 | } | |
910 | ||
911 | eloop_register_timeout(ftRRBseqTimeout, 0, wpa_ft_rrb_seq_timeout, | |
912 | wpa_auth, item); | |
913 | ||
914 | seq_req_auth[0].data = item->nonce; | |
915 | ||
17010c38 | 916 | if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_req_auth, NULL, |
eefe8630 MB |
917 | wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_REQ, |
918 | &packet, &packet_len) < 0) { | |
919 | item = NULL; /* some other seq resp might still accept this */ | |
920 | goto err; | |
921 | } | |
922 | ||
923 | dl_list_add(&rkh_seq->rx.queue, &item->list); | |
924 | ||
925 | wpa_ft_rrb_oui_send(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ, | |
926 | packet, packet_len); | |
927 | ||
928 | os_free(packet); | |
929 | ||
930 | return 0; | |
931 | err: | |
932 | wpa_printf(MSG_DEBUG, "FT: Failed to send sequence number request"); | |
933 | if (item) { | |
934 | os_free(item->auth); | |
935 | bin_clear_free(item->enc, item->enc_len); | |
936 | os_free(item); | |
937 | } | |
938 | ||
939 | return -1; | |
940 | } | |
941 | ||
942 | ||
943 | #define FT_RRB_SEQ_OK 0 | |
944 | #define FT_RRB_SEQ_DROP 1 | |
945 | #define FT_RRB_SEQ_DEFER 2 | |
946 | ||
947 | static int | |
948 | wpa_ft_rrb_seq_chk(struct ft_remote_seq *rkh_seq, const u8 *src_addr, | |
949 | const u8 *enc, size_t enc_len, | |
950 | const u8 *auth, size_t auth_len, | |
951 | const char *msgtype, int no_defer) | |
952 | { | |
953 | const u8 *f_seq; | |
954 | size_t f_seq_len; | |
955 | const struct ft_rrb_seq *msg_both; | |
956 | u32 msg_seq, msg_off, rkh_off; | |
957 | struct os_reltime now; | |
958 | unsigned int i; | |
959 | ||
960 | RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both)); | |
961 | wpa_hexdump(MSG_DEBUG, "FT: sequence number", f_seq, f_seq_len); | |
962 | msg_both = (const struct ft_rrb_seq *) f_seq; | |
963 | ||
964 | if (rkh_seq->rx.num_last == 0) { | |
965 | /* first packet from remote */ | |
966 | goto defer; | |
967 | } | |
968 | ||
969 | if (le_to_host32(msg_both->dom) != rkh_seq->rx.dom) { | |
970 | /* remote might have rebooted */ | |
971 | goto defer; | |
972 | } | |
973 | ||
974 | if (os_get_reltime(&now) == 0) { | |
975 | u32 msg_ts_now_remote, msg_ts_off; | |
976 | struct os_reltime now_remote; | |
977 | ||
978 | os_reltime_sub(&now, &rkh_seq->rx.time_offset, &now_remote); | |
979 | msg_ts_now_remote = now_remote.sec; | |
980 | msg_ts_off = le_to_host32(msg_both->ts) - | |
981 | (msg_ts_now_remote - ftRRBseqTimeout); | |
982 | if (msg_ts_off > 2 * ftRRBseqTimeout) | |
983 | goto defer; | |
984 | } | |
985 | ||
986 | msg_seq = le_to_host32(msg_both->seq); | |
987 | rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx]; | |
988 | msg_off = msg_seq - rkh_off; | |
989 | if (msg_off > 0xC0000000) | |
990 | goto out; /* too old message, drop it */ | |
991 | ||
992 | if (msg_off <= 0x40000000) { | |
993 | for (i = 0; i < rkh_seq->rx.num_last; i++) { | |
994 | if (rkh_seq->rx.last[i] == msg_seq) | |
995 | goto out; /* duplicate message, drop it */ | |
996 | } | |
997 | ||
998 | return FT_RRB_SEQ_OK; | |
999 | } | |
1000 | ||
1001 | defer: | |
1002 | if (no_defer) | |
1003 | goto out; | |
1004 | ||
1005 | wpa_printf(MSG_DEBUG, "FT: Possibly invalid sequence number in %s from " | |
1006 | MACSTR, msgtype, MAC2STR(src_addr)); | |
1007 | ||
1008 | return FT_RRB_SEQ_DEFER; | |
1009 | out: | |
1010 | wpa_printf(MSG_DEBUG, "FT: Invalid sequence number in %s from " MACSTR, | |
1011 | msgtype, MAC2STR(src_addr)); | |
1012 | ||
1013 | return FT_RRB_SEQ_DROP; | |
1014 | } | |
1015 | ||
1016 | ||
1017 | static void | |
1018 | wpa_ft_rrb_seq_accept(struct wpa_authenticator *wpa_auth, | |
1019 | struct ft_remote_seq *rkh_seq, const u8 *src_addr, | |
1020 | const u8 *auth, size_t auth_len, | |
1021 | const char *msgtype) | |
1022 | { | |
1023 | const u8 *f_seq; | |
1024 | size_t f_seq_len; | |
1025 | const struct ft_rrb_seq *msg_both; | |
1026 | u32 msg_seq, msg_off, min_off, rkh_off; | |
1027 | int minidx = 0; | |
1028 | unsigned int i; | |
1029 | ||
1030 | RRB_GET_AUTH(FT_RRB_SEQ, seq, msgtype, sizeof(*msg_both)); | |
1031 | msg_both = (const struct ft_rrb_seq *) f_seq; | |
1032 | ||
1033 | msg_seq = le_to_host32(msg_both->seq); | |
1034 | ||
1035 | if (rkh_seq->rx.num_last < FT_REMOTE_SEQ_BACKLOG) { | |
1036 | rkh_seq->rx.last[rkh_seq->rx.num_last] = msg_seq; | |
1037 | rkh_seq->rx.num_last++; | |
1038 | return; | |
1039 | } | |
1040 | ||
1041 | rkh_off = rkh_seq->rx.last[rkh_seq->rx.offsetidx]; | |
1042 | for (i = 0; i < rkh_seq->rx.num_last; i++) { | |
1043 | msg_off = rkh_seq->rx.last[i] - rkh_off; | |
1044 | min_off = rkh_seq->rx.last[minidx] - rkh_off; | |
1045 | if (msg_off < min_off && i != rkh_seq->rx.offsetidx) | |
1046 | minidx = i; | |
1047 | } | |
1048 | rkh_seq->rx.last[rkh_seq->rx.offsetidx] = msg_seq; | |
1049 | rkh_seq->rx.offsetidx = minidx; | |
1050 | ||
1051 | return; | |
1052 | out: | |
1053 | /* RRB_GET_AUTH should never fail here as | |
1054 | * wpa_ft_rrb_seq_chk() verified FT_RRB_SEQ presence. */ | |
1055 | wpa_printf(MSG_ERROR, "FT: %s() failed", __func__); | |
1056 | } | |
1057 | ||
1058 | ||
1059 | static int wpa_ft_new_seq(struct ft_remote_seq *rkh_seq, | |
1060 | struct ft_rrb_seq *f_seq) | |
1061 | { | |
1062 | struct os_reltime now; | |
1063 | ||
1064 | if (os_get_reltime(&now) < 0) | |
1065 | return -1; | |
1066 | ||
1067 | if (!rkh_seq->tx.dom) { | |
1068 | if (random_get_bytes((u8 *) &rkh_seq->tx.seq, | |
1069 | sizeof(rkh_seq->tx.seq))) { | |
1070 | wpa_printf(MSG_ERROR, | |
1071 | "FT: Failed to get random data for sequence number initialization"); | |
1072 | rkh_seq->tx.seq = now.usec; | |
1073 | } | |
1074 | if (random_get_bytes((u8 *) &rkh_seq->tx.dom, | |
1075 | sizeof(rkh_seq->tx.dom))) { | |
1076 | wpa_printf(MSG_ERROR, | |
1077 | "FT: Failed to get random data for sequence number initialization"); | |
1078 | rkh_seq->tx.dom = now.usec; | |
1079 | } | |
1080 | rkh_seq->tx.dom |= 1; | |
1081 | } | |
1082 | ||
1083 | f_seq->dom = host_to_le32(rkh_seq->tx.dom); | |
1084 | f_seq->seq = host_to_le32(rkh_seq->tx.seq); | |
1085 | f_seq->ts = host_to_le32(now.sec); | |
1086 | ||
1087 | rkh_seq->tx.seq++; | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | ||
6fc6879b | 1093 | struct wpa_ft_pmk_r0_sa { |
09211c98 | 1094 | struct dl_list list; |
a3e18dbb JM |
1095 | u8 pmk_r0[PMK_LEN_MAX]; |
1096 | size_t pmk_r0_len; | |
6fc6879b JM |
1097 | u8 pmk_r0_name[WPA_PMK_NAME_LEN]; |
1098 | u8 spa[ETH_ALEN]; | |
1b484d60 | 1099 | int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ |
17010c38 | 1100 | struct vlan_description *vlan; |
3a3e2832 | 1101 | os_time_t expiration; /* 0 for no expiration */ |
069b4e30 MB |
1102 | u8 *identity; |
1103 | size_t identity_len; | |
1104 | u8 *radius_cui; | |
1105 | size_t radius_cui_len; | |
a6509e85 MB |
1106 | os_time_t session_timeout; /* 0 for no expiration */ |
1107 | /* TODO: radius_class, EAP type */ | |
6fc6879b JM |
1108 | int pmk_r1_pushed; |
1109 | }; | |
1110 | ||
1111 | struct wpa_ft_pmk_r1_sa { | |
09211c98 | 1112 | struct dl_list list; |
a3e18dbb JM |
1113 | u8 pmk_r1[PMK_LEN_MAX]; |
1114 | size_t pmk_r1_len; | |
6fc6879b JM |
1115 | u8 pmk_r1_name[WPA_PMK_NAME_LEN]; |
1116 | u8 spa[ETH_ALEN]; | |
1b484d60 | 1117 | int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ |
17010c38 | 1118 | struct vlan_description *vlan; |
069b4e30 MB |
1119 | u8 *identity; |
1120 | size_t identity_len; | |
1121 | u8 *radius_cui; | |
1122 | size_t radius_cui_len; | |
a6509e85 MB |
1123 | os_time_t session_timeout; /* 0 for no expiration */ |
1124 | /* TODO: radius_class, EAP type */ | |
6fc6879b JM |
1125 | }; |
1126 | ||
1127 | struct wpa_ft_pmk_cache { | |
09211c98 MB |
1128 | struct dl_list pmk_r0; /* struct wpa_ft_pmk_r0_sa */ |
1129 | struct dl_list pmk_r1; /* struct wpa_ft_pmk_r1_sa */ | |
6fc6879b JM |
1130 | }; |
1131 | ||
09211c98 | 1132 | |
3a3e2832 MB |
1133 | static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx); |
1134 | static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx); | |
1135 | ||
1136 | ||
09211c98 MB |
1137 | static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0) |
1138 | { | |
1139 | if (!r0) | |
1140 | return; | |
1141 | ||
1142 | dl_list_del(&r0->list); | |
3a3e2832 | 1143 | eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL); |
09211c98 | 1144 | |
a3e18dbb | 1145 | os_memset(r0->pmk_r0, 0, PMK_LEN_MAX); |
17010c38 | 1146 | os_free(r0->vlan); |
069b4e30 MB |
1147 | os_free(r0->identity); |
1148 | os_free(r0->radius_cui); | |
09211c98 MB |
1149 | os_free(r0); |
1150 | } | |
1151 | ||
1152 | ||
3a3e2832 MB |
1153 | static void wpa_ft_expire_pmk_r0(void *eloop_ctx, void *timeout_ctx) |
1154 | { | |
1155 | struct wpa_ft_pmk_r0_sa *r0 = eloop_ctx; | |
1156 | struct os_reltime now; | |
1157 | int expires_in; | |
a6509e85 | 1158 | int session_timeout; |
3a3e2832 MB |
1159 | |
1160 | os_get_reltime(&now); | |
1161 | ||
1162 | if (!r0) | |
1163 | return; | |
1164 | ||
1165 | expires_in = r0->expiration - now.sec; | |
a6509e85 MB |
1166 | session_timeout = r0->session_timeout - now.sec; |
1167 | /* conditions to remove from cache: | |
1168 | * a) r0->expiration is set and hit | |
1169 | * -or- | |
1170 | * b) r0->session_timeout is set and hit | |
1171 | */ | |
1172 | if ((!r0->expiration || expires_in > 0) && | |
1173 | (!r0->session_timeout || session_timeout > 0)) { | |
3a3e2832 | 1174 | wpa_printf(MSG_ERROR, |
a6509e85 MB |
1175 | "FT: %s() called for non-expired entry %p", |
1176 | __func__, r0); | |
3a3e2832 | 1177 | eloop_cancel_timeout(wpa_ft_expire_pmk_r0, r0, NULL); |
a6509e85 MB |
1178 | if (r0->expiration && expires_in > 0) |
1179 | eloop_register_timeout(expires_in + 1, 0, | |
1180 | wpa_ft_expire_pmk_r0, r0, NULL); | |
1181 | if (r0->session_timeout && session_timeout > 0) | |
1182 | eloop_register_timeout(session_timeout + 1, 0, | |
1183 | wpa_ft_expire_pmk_r0, r0, NULL); | |
3a3e2832 MB |
1184 | return; |
1185 | } | |
1186 | ||
1187 | wpa_ft_free_pmk_r0(r0); | |
1188 | } | |
1189 | ||
1190 | ||
09211c98 MB |
1191 | static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1) |
1192 | { | |
1193 | if (!r1) | |
1194 | return; | |
1195 | ||
1196 | dl_list_del(&r1->list); | |
3a3e2832 | 1197 | eloop_cancel_timeout(wpa_ft_expire_pmk_r1, r1, NULL); |
09211c98 | 1198 | |
a3e18dbb | 1199 | os_memset(r1->pmk_r1, 0, PMK_LEN_MAX); |
17010c38 | 1200 | os_free(r1->vlan); |
069b4e30 MB |
1201 | os_free(r1->identity); |
1202 | os_free(r1->radius_cui); | |
09211c98 MB |
1203 | os_free(r1); |
1204 | } | |
1205 | ||
1206 | ||
3a3e2832 MB |
1207 | static void wpa_ft_expire_pmk_r1(void *eloop_ctx, void *timeout_ctx) |
1208 | { | |
1209 | struct wpa_ft_pmk_r1_sa *r1 = eloop_ctx; | |
1210 | ||
1211 | wpa_ft_free_pmk_r1(r1); | |
1212 | } | |
1213 | ||
1214 | ||
6fc6879b JM |
1215 | struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void) |
1216 | { | |
1217 | struct wpa_ft_pmk_cache *cache; | |
1218 | ||
1219 | cache = os_zalloc(sizeof(*cache)); | |
09211c98 MB |
1220 | if (cache) { |
1221 | dl_list_init(&cache->pmk_r0); | |
1222 | dl_list_init(&cache->pmk_r1); | |
1223 | } | |
6fc6879b JM |
1224 | |
1225 | return cache; | |
1226 | } | |
1227 | ||
1228 | ||
1229 | void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache) | |
1230 | { | |
1231 | struct wpa_ft_pmk_r0_sa *r0, *r0prev; | |
1232 | struct wpa_ft_pmk_r1_sa *r1, *r1prev; | |
1233 | ||
09211c98 MB |
1234 | dl_list_for_each_safe(r0, r0prev, &cache->pmk_r0, |
1235 | struct wpa_ft_pmk_r0_sa, list) | |
1236 | wpa_ft_free_pmk_r0(r0); | |
6fc6879b | 1237 | |
09211c98 MB |
1238 | dl_list_for_each_safe(r1, r1prev, &cache->pmk_r1, |
1239 | struct wpa_ft_pmk_r1_sa, list) | |
1240 | wpa_ft_free_pmk_r1(r1); | |
6fc6879b JM |
1241 | |
1242 | os_free(cache); | |
1243 | } | |
1244 | ||
1245 | ||
89dea17e MB |
1246 | static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth, |
1247 | const u8 *spa, const u8 *pmk_r0, | |
a3e18dbb | 1248 | size_t pmk_r0_len, |
3a3e2832 | 1249 | const u8 *pmk_r0_name, int pairwise, |
17010c38 | 1250 | const struct vlan_description *vlan, |
a6509e85 | 1251 | int expires_in, int session_timeout, |
069b4e30 MB |
1252 | const u8 *identity, size_t identity_len, |
1253 | const u8 *radius_cui, size_t radius_cui_len) | |
6fc6879b JM |
1254 | { |
1255 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
1256 | struct wpa_ft_pmk_r0_sa *r0; | |
3a3e2832 | 1257 | struct os_reltime now; |
6fc6879b | 1258 | |
3a3e2832 MB |
1259 | /* TODO: add limit on number of entries in cache */ |
1260 | os_get_reltime(&now); | |
6fc6879b JM |
1261 | |
1262 | r0 = os_zalloc(sizeof(*r0)); | |
1263 | if (r0 == NULL) | |
1264 | return -1; | |
1265 | ||
a3e18dbb JM |
1266 | os_memcpy(r0->pmk_r0, pmk_r0, pmk_r0_len); |
1267 | r0->pmk_r0_len = pmk_r0_len; | |
6fc6879b JM |
1268 | os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN); |
1269 | os_memcpy(r0->spa, spa, ETH_ALEN); | |
1b484d60 | 1270 | r0->pairwise = pairwise; |
3a3e2832 MB |
1271 | if (expires_in > 0) |
1272 | r0->expiration = now.sec + expires_in; | |
17010c38 MB |
1273 | if (vlan && vlan->notempty) { |
1274 | r0->vlan = os_zalloc(sizeof(*vlan)); | |
1275 | if (!r0->vlan) { | |
1276 | bin_clear_free(r0, sizeof(*r0)); | |
1277 | return -1; | |
1278 | } | |
1279 | *r0->vlan = *vlan; | |
1280 | } | |
069b4e30 MB |
1281 | if (identity) { |
1282 | r0->identity = os_malloc(identity_len); | |
1283 | if (r0->identity) { | |
1284 | os_memcpy(r0->identity, identity, identity_len); | |
1285 | r0->identity_len = identity_len; | |
1286 | } | |
1287 | } | |
1288 | if (radius_cui) { | |
1289 | r0->radius_cui = os_malloc(radius_cui_len); | |
1290 | if (r0->radius_cui) { | |
1291 | os_memcpy(r0->radius_cui, radius_cui, radius_cui_len); | |
1292 | r0->radius_cui_len = radius_cui_len; | |
1293 | } | |
1294 | } | |
a6509e85 MB |
1295 | if (session_timeout > 0) |
1296 | r0->session_timeout = now.sec + session_timeout; | |
6fc6879b | 1297 | |
09211c98 | 1298 | dl_list_add(&cache->pmk_r0, &r0->list); |
3a3e2832 MB |
1299 | if (expires_in > 0) |
1300 | eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r0, | |
1301 | r0, NULL); | |
a6509e85 MB |
1302 | if (session_timeout > 0) |
1303 | eloop_register_timeout(session_timeout + 1, 0, | |
1304 | wpa_ft_expire_pmk_r0, r0, NULL); | |
6fc6879b JM |
1305 | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth, | |
1311 | const u8 *spa, const u8 *pmk_r0_name, | |
245fc96e | 1312 | const struct wpa_ft_pmk_r0_sa **r0_out) |
6fc6879b JM |
1313 | { |
1314 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
1315 | struct wpa_ft_pmk_r0_sa *r0; | |
3a3e2832 | 1316 | struct os_reltime now; |
6fc6879b | 1317 | |
3a3e2832 | 1318 | os_get_reltime(&now); |
09211c98 | 1319 | dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) { |
6fc6879b | 1320 | if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 && |
870834a1 JM |
1321 | os_memcmp_const(r0->pmk_r0_name, pmk_r0_name, |
1322 | WPA_PMK_NAME_LEN) == 0) { | |
245fc96e | 1323 | *r0_out = r0; |
6fc6879b JM |
1324 | return 0; |
1325 | } | |
6fc6879b JM |
1326 | } |
1327 | ||
245fc96e | 1328 | *r0_out = NULL; |
6fc6879b JM |
1329 | return -1; |
1330 | } | |
1331 | ||
1332 | ||
1333 | static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth, | |
1334 | const u8 *spa, const u8 *pmk_r1, | |
a3e18dbb | 1335 | size_t pmk_r1_len, |
3a3e2832 | 1336 | const u8 *pmk_r1_name, int pairwise, |
17010c38 | 1337 | const struct vlan_description *vlan, |
a6509e85 | 1338 | int expires_in, int session_timeout, |
069b4e30 MB |
1339 | const u8 *identity, size_t identity_len, |
1340 | const u8 *radius_cui, size_t radius_cui_len) | |
6fc6879b JM |
1341 | { |
1342 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
3a3e2832 | 1343 | int max_expires_in = wpa_auth->conf.r1_max_key_lifetime; |
6fc6879b | 1344 | struct wpa_ft_pmk_r1_sa *r1; |
a6509e85 | 1345 | struct os_reltime now; |
6fc6879b | 1346 | |
3a3e2832 | 1347 | /* TODO: limit on number of entries in cache */ |
a6509e85 | 1348 | os_get_reltime(&now); |
3a3e2832 MB |
1349 | |
1350 | if (max_expires_in && (max_expires_in < expires_in || expires_in == 0)) | |
1351 | expires_in = max_expires_in; | |
6fc6879b JM |
1352 | |
1353 | r1 = os_zalloc(sizeof(*r1)); | |
1354 | if (r1 == NULL) | |
1355 | return -1; | |
1356 | ||
a3e18dbb JM |
1357 | os_memcpy(r1->pmk_r1, pmk_r1, pmk_r1_len); |
1358 | r1->pmk_r1_len = pmk_r1_len; | |
6fc6879b JM |
1359 | os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN); |
1360 | os_memcpy(r1->spa, spa, ETH_ALEN); | |
1b484d60 | 1361 | r1->pairwise = pairwise; |
17010c38 MB |
1362 | if (vlan && vlan->notempty) { |
1363 | r1->vlan = os_zalloc(sizeof(*vlan)); | |
1364 | if (!r1->vlan) { | |
1365 | bin_clear_free(r1, sizeof(*r1)); | |
1366 | return -1; | |
1367 | } | |
1368 | *r1->vlan = *vlan; | |
1369 | } | |
069b4e30 MB |
1370 | if (identity) { |
1371 | r1->identity = os_malloc(identity_len); | |
1372 | if (r1->identity) { | |
1373 | os_memcpy(r1->identity, identity, identity_len); | |
1374 | r1->identity_len = identity_len; | |
1375 | } | |
1376 | } | |
1377 | if (radius_cui) { | |
1378 | r1->radius_cui = os_malloc(radius_cui_len); | |
1379 | if (r1->radius_cui) { | |
1380 | os_memcpy(r1->radius_cui, radius_cui, radius_cui_len); | |
1381 | r1->radius_cui_len = radius_cui_len; | |
1382 | } | |
1383 | } | |
a6509e85 MB |
1384 | if (session_timeout > 0) |
1385 | r1->session_timeout = now.sec + session_timeout; | |
6fc6879b | 1386 | |
09211c98 | 1387 | dl_list_add(&cache->pmk_r1, &r1->list); |
6fc6879b | 1388 | |
3a3e2832 MB |
1389 | if (expires_in > 0) |
1390 | eloop_register_timeout(expires_in + 1, 0, wpa_ft_expire_pmk_r1, | |
1391 | r1, NULL); | |
a6509e85 MB |
1392 | if (session_timeout > 0) |
1393 | eloop_register_timeout(session_timeout + 1, 0, | |
1394 | wpa_ft_expire_pmk_r1, r1, NULL); | |
3a3e2832 | 1395 | |
6fc6879b JM |
1396 | return 0; |
1397 | } | |
1398 | ||
1399 | ||
1400 | static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth, | |
1401 | const u8 *spa, const u8 *pmk_r1_name, | |
a3e18dbb | 1402 | u8 *pmk_r1, size_t *pmk_r1_len, int *pairwise, |
069b4e30 MB |
1403 | struct vlan_description *vlan, |
1404 | const u8 **identity, size_t *identity_len, | |
a6509e85 MB |
1405 | const u8 **radius_cui, size_t *radius_cui_len, |
1406 | int *session_timeout) | |
6fc6879b JM |
1407 | { |
1408 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; | |
1409 | struct wpa_ft_pmk_r1_sa *r1; | |
a6509e85 MB |
1410 | struct os_reltime now; |
1411 | ||
1412 | os_get_reltime(&now); | |
6fc6879b | 1413 | |
09211c98 | 1414 | dl_list_for_each(r1, &cache->pmk_r1, struct wpa_ft_pmk_r1_sa, list) { |
6fc6879b | 1415 | if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 && |
870834a1 JM |
1416 | os_memcmp_const(r1->pmk_r1_name, pmk_r1_name, |
1417 | WPA_PMK_NAME_LEN) == 0) { | |
a3e18dbb JM |
1418 | os_memcpy(pmk_r1, r1->pmk_r1, r1->pmk_r1_len); |
1419 | *pmk_r1_len = r1->pmk_r1_len; | |
1b484d60 JM |
1420 | if (pairwise) |
1421 | *pairwise = r1->pairwise; | |
17010c38 MB |
1422 | if (vlan && r1->vlan) |
1423 | *vlan = *r1->vlan; | |
1424 | if (vlan && !r1->vlan) | |
1425 | os_memset(vlan, 0, sizeof(*vlan)); | |
069b4e30 MB |
1426 | if (identity && identity_len) { |
1427 | *identity = r1->identity; | |
1428 | *identity_len = r1->identity_len; | |
1429 | } | |
1430 | if (radius_cui && radius_cui_len) { | |
1431 | *radius_cui = r1->radius_cui; | |
1432 | *radius_cui_len = r1->radius_cui_len; | |
1433 | } | |
a6509e85 MB |
1434 | if (session_timeout && r1->session_timeout > now.sec) |
1435 | *session_timeout = r1->session_timeout - | |
1436 | now.sec; | |
1437 | else if (session_timeout && r1->session_timeout) | |
1438 | *session_timeout = 1; | |
1439 | else | |
1440 | *session_timeout = 0; | |
6fc6879b JM |
1441 | return 0; |
1442 | } | |
6fc6879b JM |
1443 | } |
1444 | ||
1445 | return -1; | |
1446 | } | |
1447 | ||
1448 | ||
eefe8630 MB |
1449 | static int wpa_ft_rrb_init_r0kh_seq(struct ft_remote_r0kh *r0kh) |
1450 | { | |
1451 | if (r0kh->seq) | |
1452 | return 0; | |
1453 | ||
1454 | r0kh->seq = os_zalloc(sizeof(*r0kh->seq)); | |
1455 | if (!r0kh->seq) { | |
1456 | wpa_printf(MSG_DEBUG, "FT: Failed to allocate r0kh->seq"); | |
1457 | return -1; | |
1458 | } | |
1459 | ||
1460 | dl_list_init(&r0kh->seq->rx.queue); | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | ||
245fc96e | 1466 | static void wpa_ft_rrb_lookup_r0kh(struct wpa_authenticator *wpa_auth, |
eefe8630 | 1467 | const u8 *f_r0kh_id, size_t f_r0kh_id_len, |
3a46cf93 MB |
1468 | struct ft_remote_r0kh **r0kh_out, |
1469 | struct ft_remote_r0kh **r0kh_wildcard) | |
245fc96e MB |
1470 | { |
1471 | struct ft_remote_r0kh *r0kh; | |
1472 | ||
3a46cf93 | 1473 | *r0kh_wildcard = NULL; |
eefe8630 MB |
1474 | *r0kh_out = NULL; |
1475 | ||
3a46cf93 MB |
1476 | if (wpa_auth->conf.r0kh_list) |
1477 | r0kh = *wpa_auth->conf.r0kh_list; | |
1478 | else | |
1479 | r0kh = NULL; | |
1480 | for (; r0kh; r0kh = r0kh->next) { | |
1481 | if (r0kh->id_len == 1 && r0kh->id[0] == '*') | |
1482 | *r0kh_wildcard = r0kh; | |
eefe8630 | 1483 | if (f_r0kh_id && r0kh->id_len == f_r0kh_id_len && |
3a46cf93 | 1484 | os_memcmp_const(f_r0kh_id, r0kh->id, f_r0kh_id_len) == 0) |
eefe8630 | 1485 | *r0kh_out = r0kh; |
245fc96e MB |
1486 | } |
1487 | ||
3a46cf93 | 1488 | if (!*r0kh_out && !*r0kh_wildcard) |
245fc96e MB |
1489 | wpa_printf(MSG_DEBUG, "FT: No matching R0KH found"); |
1490 | ||
eefe8630 MB |
1491 | if (*r0kh_out && wpa_ft_rrb_init_r0kh_seq(*r0kh_out) < 0) |
1492 | *r0kh_out = NULL; | |
1493 | } | |
1494 | ||
1495 | ||
1496 | static int wpa_ft_rrb_init_r1kh_seq(struct ft_remote_r1kh *r1kh) | |
1497 | { | |
1498 | if (r1kh->seq) | |
1499 | return 0; | |
1500 | ||
1501 | r1kh->seq = os_zalloc(sizeof(*r1kh->seq)); | |
1502 | if (!r1kh->seq) { | |
1503 | wpa_printf(MSG_DEBUG, "FT: Failed to allocate r1kh->seq"); | |
1504 | return -1; | |
1505 | } | |
1506 | ||
1507 | dl_list_init(&r1kh->seq->rx.queue); | |
1508 | ||
1509 | return 0; | |
245fc96e MB |
1510 | } |
1511 | ||
1512 | ||
1513 | static void wpa_ft_rrb_lookup_r1kh(struct wpa_authenticator *wpa_auth, | |
eefe8630 | 1514 | const u8 *f_r1kh_id, |
3a46cf93 MB |
1515 | struct ft_remote_r1kh **r1kh_out, |
1516 | struct ft_remote_r1kh **r1kh_wildcard) | |
245fc96e MB |
1517 | { |
1518 | struct ft_remote_r1kh *r1kh; | |
1519 | ||
3a46cf93 | 1520 | *r1kh_wildcard = NULL; |
eefe8630 MB |
1521 | *r1kh_out = NULL; |
1522 | ||
3a46cf93 MB |
1523 | if (wpa_auth->conf.r1kh_list) |
1524 | r1kh = *wpa_auth->conf.r1kh_list; | |
1525 | else | |
1526 | r1kh = NULL; | |
1527 | for (; r1kh; r1kh = r1kh->next) { | |
1528 | if (is_zero_ether_addr(r1kh->addr) && | |
1529 | is_zero_ether_addr(r1kh->id)) | |
1530 | *r1kh_wildcard = r1kh; | |
245fc96e | 1531 | if (f_r1kh_id && |
3a46cf93 | 1532 | os_memcmp_const(r1kh->id, f_r1kh_id, FT_R1KH_ID_LEN) == 0) |
eefe8630 | 1533 | *r1kh_out = r1kh; |
245fc96e MB |
1534 | } |
1535 | ||
3a46cf93 | 1536 | if (!*r1kh_out && !*r1kh_wildcard) |
245fc96e MB |
1537 | wpa_printf(MSG_DEBUG, "FT: No matching R1KH found"); |
1538 | ||
eefe8630 MB |
1539 | if (*r1kh_out && wpa_ft_rrb_init_r1kh_seq(*r1kh_out) < 0) |
1540 | *r1kh_out = NULL; | |
245fc96e MB |
1541 | } |
1542 | ||
1543 | ||
1544 | static int wpa_ft_rrb_check_r0kh(struct wpa_authenticator *wpa_auth, | |
1545 | const u8 *f_r0kh_id, size_t f_r0kh_id_len) | |
1546 | { | |
1547 | if (f_r0kh_id_len != wpa_auth->conf.r0_key_holder_len || | |
1548 | os_memcmp_const(f_r0kh_id, wpa_auth->conf.r0_key_holder, | |
1549 | f_r0kh_id_len) != 0) | |
1550 | return -1; | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | ||
1556 | static int wpa_ft_rrb_check_r1kh(struct wpa_authenticator *wpa_auth, | |
1557 | const u8 *f_r1kh_id) | |
1558 | { | |
1559 | if (os_memcmp_const(f_r1kh_id, wpa_auth->conf.r1_key_holder, | |
1560 | FT_R1KH_ID_LEN) != 0) | |
1561 | return -1; | |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | ||
3a46cf93 MB |
1567 | static void wpa_ft_rrb_del_r0kh(void *eloop_ctx, void *timeout_ctx) |
1568 | { | |
1569 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1570 | struct ft_remote_r0kh *r0kh, *prev = NULL; | |
1571 | ||
1572 | if (!wpa_auth->conf.r0kh_list) | |
1573 | return; | |
1574 | ||
1575 | for (r0kh = *wpa_auth->conf.r0kh_list; r0kh; r0kh = r0kh->next) { | |
1576 | if (r0kh == timeout_ctx) | |
1577 | break; | |
1578 | prev = r0kh; | |
1579 | } | |
1580 | if (!r0kh) | |
1581 | return; | |
1582 | if (prev) | |
1583 | prev->next = r0kh->next; | |
1584 | else | |
1585 | *wpa_auth->conf.r0kh_list = r0kh->next; | |
1586 | if (r0kh->seq) | |
1587 | wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0); | |
1588 | os_free(r0kh->seq); | |
1589 | os_free(r0kh); | |
1590 | } | |
1591 | ||
1592 | ||
1593 | static void wpa_ft_rrb_r0kh_replenish(struct wpa_authenticator *wpa_auth, | |
1594 | struct ft_remote_r0kh *r0kh, int timeout) | |
1595 | { | |
1596 | if (timeout > 0) | |
1597 | eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r0kh, | |
1598 | wpa_auth, r0kh); | |
1599 | } | |
1600 | ||
1601 | ||
1602 | static void wpa_ft_rrb_r0kh_timeout(struct wpa_authenticator *wpa_auth, | |
1603 | struct ft_remote_r0kh *r0kh, int timeout) | |
1604 | { | |
1605 | eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth, r0kh); | |
1606 | ||
1607 | if (timeout > 0) | |
1608 | eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh, | |
1609 | wpa_auth, r0kh); | |
1610 | } | |
1611 | ||
1612 | ||
1613 | static struct ft_remote_r0kh * | |
1614 | wpa_ft_rrb_add_r0kh(struct wpa_authenticator *wpa_auth, | |
1615 | struct ft_remote_r0kh *r0kh_wildcard, | |
1616 | const u8 *src_addr, const u8 *r0kh_id, size_t id_len, | |
1617 | int timeout) | |
1618 | { | |
1619 | struct ft_remote_r0kh *r0kh; | |
1620 | ||
1621 | if (!wpa_auth->conf.r0kh_list) | |
1622 | return NULL; | |
1623 | ||
1624 | r0kh = os_zalloc(sizeof(*r0kh)); | |
1625 | if (!r0kh) | |
1626 | return NULL; | |
1627 | ||
1628 | if (src_addr) | |
1629 | os_memcpy(r0kh->addr, src_addr, sizeof(r0kh->addr)); | |
1630 | ||
1631 | if (id_len > FT_R0KH_ID_MAX_LEN) | |
1632 | id_len = FT_R0KH_ID_MAX_LEN; | |
1633 | os_memcpy(r0kh->id, r0kh_id, id_len); | |
1634 | r0kh->id_len = id_len; | |
1635 | ||
1636 | os_memcpy(r0kh->key, r0kh_wildcard->key, sizeof(r0kh->key)); | |
1637 | ||
1638 | r0kh->next = *wpa_auth->conf.r0kh_list; | |
1639 | *wpa_auth->conf.r0kh_list = r0kh; | |
1640 | ||
1641 | if (timeout > 0) | |
1642 | eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r0kh, | |
1643 | wpa_auth, r0kh); | |
1644 | ||
1645 | if (wpa_ft_rrb_init_r0kh_seq(r0kh) < 0) | |
1646 | return NULL; | |
1647 | ||
1648 | return r0kh; | |
1649 | } | |
1650 | ||
1651 | ||
1652 | static void wpa_ft_rrb_del_r1kh(void *eloop_ctx, void *timeout_ctx) | |
1653 | { | |
1654 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1655 | struct ft_remote_r1kh *r1kh, *prev = NULL; | |
1656 | ||
1657 | if (!wpa_auth->conf.r1kh_list) | |
1658 | return; | |
1659 | ||
1660 | for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) { | |
1661 | if (r1kh == timeout_ctx) | |
1662 | break; | |
1663 | prev = r1kh; | |
1664 | } | |
1665 | if (!r1kh) | |
1666 | return; | |
1667 | if (prev) | |
1668 | prev->next = r1kh->next; | |
1669 | else | |
1670 | *wpa_auth->conf.r1kh_list = r1kh->next; | |
1671 | if (r1kh->seq) | |
1672 | wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0); | |
1673 | os_free(r1kh->seq); | |
1674 | os_free(r1kh); | |
1675 | } | |
1676 | ||
1677 | ||
1678 | static void wpa_ft_rrb_r1kh_replenish(struct wpa_authenticator *wpa_auth, | |
1679 | struct ft_remote_r1kh *r1kh, int timeout) | |
1680 | { | |
1681 | if (timeout > 0) | |
1682 | eloop_replenish_timeout(timeout, 0, wpa_ft_rrb_del_r1kh, | |
1683 | wpa_auth, r1kh); | |
1684 | } | |
1685 | ||
1686 | ||
1687 | static struct ft_remote_r1kh * | |
1688 | wpa_ft_rrb_add_r1kh(struct wpa_authenticator *wpa_auth, | |
1689 | struct ft_remote_r1kh *r1kh_wildcard, | |
1690 | const u8 *src_addr, const u8 *r1kh_id, int timeout) | |
1691 | { | |
1692 | struct ft_remote_r1kh *r1kh; | |
1693 | ||
1694 | if (!wpa_auth->conf.r1kh_list) | |
1695 | return NULL; | |
1696 | ||
1697 | r1kh = os_zalloc(sizeof(*r1kh)); | |
1698 | if (!r1kh) | |
1699 | return NULL; | |
1700 | ||
1701 | os_memcpy(r1kh->addr, src_addr, sizeof(r1kh->addr)); | |
1702 | os_memcpy(r1kh->id, r1kh_id, sizeof(r1kh->id)); | |
1703 | os_memcpy(r1kh->key, r1kh_wildcard->key, sizeof(r1kh->key)); | |
1704 | r1kh->next = *wpa_auth->conf.r1kh_list; | |
1705 | *wpa_auth->conf.r1kh_list = r1kh; | |
1706 | ||
1707 | if (timeout > 0) | |
1708 | eloop_register_timeout(timeout, 0, wpa_ft_rrb_del_r1kh, | |
1709 | wpa_auth, r1kh); | |
1710 | ||
1711 | if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0) | |
1712 | return NULL; | |
1713 | ||
1714 | return r1kh; | |
1715 | } | |
1716 | ||
1717 | ||
1718 | void wpa_ft_sta_deinit(struct wpa_state_machine *sm) | |
1719 | { | |
1720 | eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL); | |
1721 | } | |
1722 | ||
1723 | ||
eefe8630 MB |
1724 | static void wpa_ft_deinit_seq(struct wpa_authenticator *wpa_auth) |
1725 | { | |
1726 | struct ft_remote_r0kh *r0kh; | |
1727 | struct ft_remote_r1kh *r1kh; | |
1728 | ||
1729 | eloop_cancel_timeout(wpa_ft_rrb_seq_timeout, wpa_auth, ELOOP_ALL_CTX); | |
1730 | ||
3a46cf93 MB |
1731 | if (wpa_auth->conf.r0kh_list) |
1732 | r0kh = *wpa_auth->conf.r0kh_list; | |
1733 | else | |
1734 | r0kh = NULL; | |
1735 | for (; r0kh; r0kh = r0kh->next) { | |
eefe8630 MB |
1736 | if (!r0kh->seq) |
1737 | continue; | |
1738 | wpa_ft_rrb_seq_flush(wpa_auth, r0kh->seq, 0); | |
1739 | os_free(r0kh->seq); | |
1740 | r0kh->seq = NULL; | |
1741 | } | |
1742 | ||
3a46cf93 MB |
1743 | if (wpa_auth->conf.r1kh_list) |
1744 | r1kh = *wpa_auth->conf.r1kh_list; | |
1745 | else | |
1746 | r1kh = NULL; | |
1747 | for (; r1kh; r1kh = r1kh->next) { | |
eefe8630 MB |
1748 | if (!r1kh->seq) |
1749 | continue; | |
1750 | wpa_ft_rrb_seq_flush(wpa_auth, r1kh->seq, 0); | |
1751 | os_free(r1kh->seq); | |
1752 | r1kh->seq = NULL; | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | ||
3a46cf93 MB |
1757 | static void wpa_ft_deinit_rkh_tmp(struct wpa_authenticator *wpa_auth) |
1758 | { | |
1759 | struct ft_remote_r0kh *r0kh, *r0kh_next, *r0kh_prev = NULL; | |
1760 | struct ft_remote_r1kh *r1kh, *r1kh_next, *r1kh_prev = NULL; | |
1761 | ||
1762 | if (wpa_auth->conf.r0kh_list) | |
1763 | r0kh = *wpa_auth->conf.r0kh_list; | |
1764 | else | |
1765 | r0kh = NULL; | |
1766 | while (r0kh) { | |
1767 | r0kh_next = r0kh->next; | |
1768 | if (eloop_cancel_timeout(wpa_ft_rrb_del_r0kh, wpa_auth, | |
1769 | r0kh) > 0) { | |
1770 | if (r0kh_prev) | |
1771 | r0kh_prev->next = r0kh_next; | |
1772 | else | |
1773 | *wpa_auth->conf.r0kh_list = r0kh_next; | |
1774 | os_free(r0kh); | |
1775 | } else { | |
1776 | r0kh_prev = r0kh; | |
1777 | } | |
1778 | r0kh = r0kh_next; | |
1779 | } | |
1780 | ||
1781 | if (wpa_auth->conf.r1kh_list) | |
1782 | r1kh = *wpa_auth->conf.r1kh_list; | |
1783 | else | |
1784 | r1kh = NULL; | |
1785 | while (r1kh) { | |
1786 | r1kh_next = r1kh->next; | |
1787 | if (eloop_cancel_timeout(wpa_ft_rrb_del_r1kh, wpa_auth, | |
1788 | r1kh) > 0) { | |
1789 | if (r1kh_prev) | |
1790 | r1kh_prev->next = r1kh_next; | |
1791 | else | |
1792 | *wpa_auth->conf.r1kh_list = r1kh_next; | |
1793 | os_free(r1kh); | |
1794 | } else { | |
1795 | r1kh_prev = r1kh; | |
1796 | } | |
1797 | r1kh = r1kh_next; | |
1798 | } | |
1799 | } | |
1800 | ||
1801 | ||
eefe8630 MB |
1802 | void wpa_ft_deinit(struct wpa_authenticator *wpa_auth) |
1803 | { | |
1804 | wpa_ft_deinit_seq(wpa_auth); | |
3a46cf93 MB |
1805 | wpa_ft_deinit_rkh_tmp(wpa_auth); |
1806 | } | |
1807 | ||
1808 | ||
1809 | static void wpa_ft_block_r0kh(struct wpa_authenticator *wpa_auth, | |
1810 | const u8 *f_r0kh_id, size_t f_r0kh_id_len) | |
1811 | { | |
1812 | struct ft_remote_r0kh *r0kh, *r0kh_wildcard; | |
1813 | ||
1814 | if (!wpa_auth->conf.rkh_neg_timeout) | |
1815 | return; | |
1816 | ||
1817 | wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, | |
1818 | &r0kh, &r0kh_wildcard); | |
1819 | ||
1820 | if (!r0kh_wildcard) { | |
1821 | /* r0kh removed after neg_timeout and might need re-adding */ | |
1822 | return; | |
1823 | } | |
1824 | ||
1825 | wpa_hexdump(MSG_DEBUG, "FT: Blacklist R0KH-ID", | |
1826 | f_r0kh_id, f_r0kh_id_len); | |
1827 | ||
1828 | if (r0kh) { | |
1829 | wpa_ft_rrb_r0kh_timeout(wpa_auth, r0kh, | |
1830 | wpa_auth->conf.rkh_neg_timeout); | |
1831 | os_memset(r0kh->addr, 0, ETH_ALEN); | |
1832 | } else | |
1833 | wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, NULL, f_r0kh_id, | |
1834 | f_r0kh_id_len, | |
1835 | wpa_auth->conf.rkh_neg_timeout); | |
1836 | } | |
1837 | ||
1838 | ||
1839 | static void wpa_ft_expire_pull(void *eloop_ctx, void *timeout_ctx) | |
1840 | { | |
1841 | struct wpa_state_machine *sm = eloop_ctx; | |
1842 | ||
1843 | wpa_printf(MSG_DEBUG, "FT: Timeout pending pull request for " MACSTR, | |
1844 | MAC2STR(sm->addr)); | |
1845 | if (sm->ft_pending_pull_left_retries <= 0) | |
1846 | wpa_ft_block_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len); | |
1847 | ||
1848 | /* cancel multiple timeouts */ | |
1849 | eloop_cancel_timeout(wpa_ft_expire_pull, sm, NULL); | |
1850 | ft_finish_pull(sm); | |
eefe8630 MB |
1851 | } |
1852 | ||
1853 | ||
692ec305 JM |
1854 | static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm, |
1855 | const u8 *ies, size_t ies_len, | |
1856 | const u8 *pmk_r0_name) | |
6fc6879b | 1857 | { |
3a46cf93 | 1858 | struct ft_remote_r0kh *r0kh, *r0kh_wildcard; |
245fc96e | 1859 | u8 *packet = NULL; |
eefe8630 | 1860 | const u8 *key, *f_r1kh_id = sm->wpa_auth->conf.r1_key_holder; |
245fc96e | 1861 | size_t packet_len, key_len; |
eefe8630 | 1862 | struct ft_rrb_seq f_seq; |
3a46cf93 MB |
1863 | int tsecs, tusecs, first; |
1864 | struct wpabuf *ft_pending_req_ies; | |
1865 | int r0kh_timeout; | |
245fc96e MB |
1866 | struct tlv_list req_enc[] = { |
1867 | { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN, | |
1868 | .data = pmk_r0_name }, | |
1869 | { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN, | |
1870 | .data = sm->addr }, | |
1871 | { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL }, | |
1872 | }; | |
1873 | struct tlv_list req_auth[] = { | |
1874 | { .type = FT_RRB_NONCE, .len = FT_RRB_NONCE_LEN, | |
1875 | .data = sm->ft_pending_pull_nonce }, | |
eefe8630 MB |
1876 | { .type = FT_RRB_SEQ, .len = sizeof(f_seq), |
1877 | .data = (u8 *) &f_seq }, | |
245fc96e MB |
1878 | { .type = FT_RRB_R0KH_ID, .len = sm->r0kh_id_len, |
1879 | .data = sm->r0kh_id }, | |
1880 | { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN, | |
eefe8630 | 1881 | .data = f_r1kh_id }, |
245fc96e MB |
1882 | { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL }, |
1883 | }; | |
1884 | ||
3a46cf93 MB |
1885 | if (sm->ft_pending_pull_left_retries <= 0) |
1886 | return -1; | |
1887 | first = sm->ft_pending_pull_left_retries == | |
1888 | sm->wpa_auth->conf.rkh_pull_retries; | |
1889 | sm->ft_pending_pull_left_retries--; | |
1890 | ||
eefe8630 | 1891 | wpa_ft_rrb_lookup_r0kh(sm->wpa_auth, sm->r0kh_id, sm->r0kh_id_len, |
3a46cf93 MB |
1892 | &r0kh, &r0kh_wildcard); |
1893 | ||
1894 | /* Keep r0kh sufficiently long in the list for seq num check */ | |
1895 | r0kh_timeout = sm->wpa_auth->conf.rkh_pull_timeout / 1000 + | |
1896 | 1 + ftRRBseqTimeout; | |
1897 | if (r0kh) { | |
1898 | wpa_ft_rrb_r0kh_replenish(sm->wpa_auth, r0kh, r0kh_timeout); | |
1899 | } else if (r0kh_wildcard) { | |
1900 | wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID"); | |
1901 | /* r0kh->addr: updated by SEQ_RESP and wpa_ft_expire_pull */ | |
1902 | r0kh = wpa_ft_rrb_add_r0kh(sm->wpa_auth, r0kh_wildcard, | |
1903 | r0kh_wildcard->addr, | |
1904 | sm->r0kh_id, sm->r0kh_id_len, | |
1905 | r0kh_timeout); | |
1906 | } | |
692ec305 JM |
1907 | if (r0kh == NULL) { |
1908 | wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID", | |
1909 | sm->r0kh_id, sm->r0kh_id_len); | |
6fc6879b | 1910 | return -1; |
692ec305 | 1911 | } |
3a46cf93 MB |
1912 | if (is_zero_ether_addr(r0kh->addr)) { |
1913 | wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID is blacklisted", | |
1914 | sm->r0kh_id, sm->r0kh_id_len); | |
1915 | return -1; | |
1916 | } | |
1dc0945c JM |
1917 | if (os_memcmp(r0kh->addr, sm->wpa_auth->addr, ETH_ALEN) == 0) { |
1918 | wpa_printf(MSG_DEBUG, | |
1919 | "FT: R0KH-ID points to self - no matching key available"); | |
1920 | return -1; | |
1921 | } | |
eefe8630 | 1922 | |
245fc96e MB |
1923 | key = r0kh->key; |
1924 | key_len = sizeof(r0kh->key); | |
6fc6879b JM |
1925 | |
1926 | wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH " | |
1927 | "address " MACSTR, MAC2STR(r0kh->addr)); | |
1928 | ||
eefe8630 MB |
1929 | if (r0kh->seq->rx.num_last == 0) { |
1930 | /* A sequence request will be sent out anyway when pull | |
1931 | * response is received. Send it out now to avoid one RTT. */ | |
1932 | wpa_ft_rrb_seq_req(sm->wpa_auth, r0kh->seq, r0kh->addr, | |
1933 | r0kh->id, r0kh->id_len, f_r1kh_id, key, | |
1934 | key_len, NULL, 0, NULL, 0, NULL); | |
1935 | } | |
1936 | ||
3a46cf93 MB |
1937 | if (first && |
1938 | random_get_bytes(sm->ft_pending_pull_nonce, FT_RRB_NONCE_LEN) < 0) { | |
6fc6879b JM |
1939 | wpa_printf(MSG_DEBUG, "FT: Failed to get random data for " |
1940 | "nonce"); | |
1941 | return -1; | |
1942 | } | |
6fc6879b | 1943 | |
eefe8630 MB |
1944 | if (wpa_ft_new_seq(r0kh->seq, &f_seq) < 0) { |
1945 | wpa_printf(MSG_DEBUG, "FT: Failed to get seq num"); | |
1946 | return -1; | |
1947 | } | |
1948 | ||
17010c38 | 1949 | if (wpa_ft_rrb_build(key, key_len, req_enc, NULL, req_auth, NULL, |
245fc96e MB |
1950 | sm->wpa_auth->addr, FT_PACKET_R0KH_R1KH_PULL, |
1951 | &packet, &packet_len) < 0) | |
6fc6879b JM |
1952 | return -1; |
1953 | ||
3a46cf93 | 1954 | ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len); |
692ec305 | 1955 | wpabuf_free(sm->ft_pending_req_ies); |
3a46cf93 | 1956 | sm->ft_pending_req_ies = ft_pending_req_ies; |
245fc96e MB |
1957 | if (!sm->ft_pending_req_ies) { |
1958 | os_free(packet); | |
692ec305 | 1959 | return -1; |
245fc96e | 1960 | } |
692ec305 | 1961 | |
3a46cf93 MB |
1962 | tsecs = sm->wpa_auth->conf.rkh_pull_timeout / 1000; |
1963 | tusecs = (sm->wpa_auth->conf.rkh_pull_timeout % 1000) * 1000; | |
1964 | eloop_register_timeout(tsecs, tusecs, wpa_ft_expire_pull, sm, NULL); | |
1965 | ||
50bd8e0a | 1966 | wpa_ft_rrb_oui_send(sm->wpa_auth, r0kh->addr, FT_PACKET_R0KH_R1KH_PULL, |
245fc96e MB |
1967 | packet, packet_len); |
1968 | ||
1969 | os_free(packet); | |
6fc6879b JM |
1970 | |
1971 | return 0; | |
1972 | } | |
1973 | ||
1974 | ||
89dea17e MB |
1975 | int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm, |
1976 | const u8 *pmk_r0, const u8 *pmk_r0_name) | |
1977 | { | |
3a3e2832 | 1978 | int expires_in = sm->wpa_auth->conf.r0_key_lifetime; |
17010c38 | 1979 | struct vlan_description vlan; |
069b4e30 MB |
1980 | const u8 *identity, *radius_cui; |
1981 | size_t identity_len, radius_cui_len; | |
a6509e85 | 1982 | int session_timeout; |
a3e18dbb | 1983 | size_t pmk_r0_len = PMK_LEN; |
17010c38 MB |
1984 | |
1985 | if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) { | |
1986 | wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR, | |
1987 | MAC2STR(sm->addr)); | |
1988 | return -1; | |
1989 | } | |
3a3e2832 | 1990 | |
069b4e30 MB |
1991 | identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity); |
1992 | radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr, | |
1993 | &radius_cui); | |
a6509e85 | 1994 | session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr); |
069b4e30 | 1995 | |
a3e18dbb JM |
1996 | return wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len, |
1997 | pmk_r0_name, sm->pairwise, &vlan, expires_in, | |
a6509e85 MB |
1998 | session_timeout, identity, identity_len, |
1999 | radius_cui, radius_cui_len); | |
89dea17e MB |
2000 | } |
2001 | ||
2002 | ||
6fc6879b | 2003 | int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, |
98cd3d1c | 2004 | struct wpa_ptk *ptk) |
6fc6879b | 2005 | { |
a3e18dbb JM |
2006 | u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN]; |
2007 | size_t pmk_r0_len = PMK_LEN; | |
2008 | size_t pmk_r1_len = pmk_r0_len; | |
2009 | u8 pmk_r1[PMK_LEN_MAX]; | |
6fc6879b JM |
2010 | u8 ptk_name[WPA_PMK_NAME_LEN]; |
2011 | const u8 *mdid = sm->wpa_auth->conf.mobility_domain; | |
2012 | const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder; | |
2013 | size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len; | |
2014 | const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder; | |
2015 | const u8 *ssid = sm->wpa_auth->conf.ssid; | |
2016 | size_t ssid_len = sm->wpa_auth->conf.ssid_len; | |
96590564 | 2017 | int psk_local = sm->wpa_auth->conf.ft_psk_generate_local; |
3a3e2832 | 2018 | int expires_in = sm->wpa_auth->conf.r0_key_lifetime; |
17010c38 | 2019 | struct vlan_description vlan; |
069b4e30 MB |
2020 | const u8 *identity, *radius_cui; |
2021 | size_t identity_len, radius_cui_len; | |
a6509e85 | 2022 | int session_timeout; |
6fc6879b | 2023 | |
6fc6879b JM |
2024 | if (sm->xxkey_len == 0) { |
2025 | wpa_printf(MSG_DEBUG, "FT: XXKey not available for key " | |
2026 | "derivation"); | |
2027 | return -1; | |
2028 | } | |
2029 | ||
17010c38 MB |
2030 | if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) { |
2031 | wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR, | |
2032 | MAC2STR(sm->addr)); | |
2033 | return -1; | |
2034 | } | |
2035 | ||
069b4e30 MB |
2036 | identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity); |
2037 | radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr, | |
2038 | &radius_cui); | |
a6509e85 | 2039 | session_timeout = wpa_ft_get_session_timeout(sm->wpa_auth, sm->addr); |
069b4e30 | 2040 | |
364c064a JM |
2041 | if (wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid, |
2042 | r0kh, r0kh_len, sm->addr, | |
2043 | pmk_r0, pmk_r0_name) < 0) | |
2044 | return -1; | |
a3e18dbb | 2045 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len); |
6fc6879b | 2046 | wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN); |
96590564 | 2047 | if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) |
a3e18dbb JM |
2048 | wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_len, |
2049 | pmk_r0_name, | |
a6509e85 MB |
2050 | sm->pairwise, &vlan, expires_in, |
2051 | session_timeout, identity, identity_len, | |
2052 | radius_cui, radius_cui_len); | |
6fc6879b | 2053 | |
a3e18dbb | 2054 | if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_len, pmk_r0_name, r1kh, sm->addr, |
364c064a JM |
2055 | pmk_r1, sm->pmk_r1_name) < 0) |
2056 | return -1; | |
a3e18dbb | 2057 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len); |
26e23750 JM |
2058 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name, |
2059 | WPA_PMK_NAME_LEN); | |
96590564 | 2060 | if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) |
a3e18dbb | 2061 | wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_len, |
17010c38 | 2062 | sm->pmk_r1_name, sm->pairwise, &vlan, |
a6509e85 MB |
2063 | expires_in, session_timeout, identity, |
2064 | identity_len, radius_cui, radius_cui_len); | |
6fc6879b | 2065 | |
a3e18dbb JM |
2066 | return wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce, |
2067 | sm->addr, sm->wpa_auth->addr, sm->pmk_r1_name, | |
98cd3d1c | 2068 | ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise); |
6fc6879b JM |
2069 | } |
2070 | ||
2071 | ||
2072 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
2073 | const u8 *addr, int idx, u8 *seq) | |
2074 | { | |
cef8fac0 | 2075 | if (wpa_auth->cb->get_seqnum == NULL) |
6fc6879b | 2076 | return -1; |
cef8fac0 | 2077 | return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq); |
6fc6879b JM |
2078 | } |
2079 | ||
2080 | ||
2081 | static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len) | |
2082 | { | |
2083 | u8 *subelem; | |
2084 | struct wpa_group *gsm = sm->group; | |
2085 | size_t subelem_len, pad_len; | |
2086 | const u8 *key; | |
2087 | size_t key_len; | |
2088 | u8 keybuf[32]; | |
2089 | ||
2090 | key_len = gsm->GTK_len; | |
2091 | if (key_len > sizeof(keybuf)) | |
2092 | return NULL; | |
2093 | ||
2094 | /* | |
2095 | * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less | |
2096 | * than 16 bytes. | |
2097 | */ | |
2098 | pad_len = key_len % 8; | |
2099 | if (pad_len) | |
2100 | pad_len = 8 - pad_len; | |
2101 | if (key_len + pad_len < 16) | |
2102 | pad_len += 8; | |
5bfc46bb | 2103 | if (pad_len && key_len < sizeof(keybuf)) { |
6fc6879b JM |
2104 | os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len); |
2105 | os_memset(keybuf + key_len, 0, pad_len); | |
2106 | keybuf[key_len] = 0xdd; | |
2107 | key_len += pad_len; | |
2108 | key = keybuf; | |
2109 | } else | |
2110 | key = gsm->GTK[gsm->GN - 1]; | |
2111 | ||
2112 | /* | |
39eb4d08 | 2113 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | |
6fc6879b JM |
2114 | * Key[5..32]. |
2115 | */ | |
39eb4d08 | 2116 | subelem_len = 13 + key_len + 8; |
6fc6879b JM |
2117 | subelem = os_zalloc(subelem_len); |
2118 | if (subelem == NULL) | |
2119 | return NULL; | |
2120 | ||
2121 | subelem[0] = FTIE_SUBELEM_GTK; | |
39eb4d08 JM |
2122 | subelem[1] = 11 + key_len + 8; |
2123 | /* Key ID in B0-B1 of Key Info */ | |
2124 | WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03); | |
2125 | subelem[4] = gsm->GTK_len; | |
2126 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5); | |
98cd3d1c JM |
2127 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, key_len / 8, key, |
2128 | subelem + 13)) { | |
6fc6879b JM |
2129 | os_free(subelem); |
2130 | return NULL; | |
2131 | } | |
2132 | ||
2133 | *len = subelem_len; | |
2134 | return subelem; | |
2135 | } | |
2136 | ||
2137 | ||
b27f13ed JM |
2138 | #ifdef CONFIG_IEEE80211W |
2139 | static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len) | |
2140 | { | |
2141 | u8 *subelem, *pos; | |
2142 | struct wpa_group *gsm = sm->group; | |
2143 | size_t subelem_len; | |
2144 | ||
ff89afb7 JM |
2145 | /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] | |
2146 | * Key[16+8] */ | |
2147 | subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8; | |
b27f13ed JM |
2148 | subelem = os_zalloc(subelem_len); |
2149 | if (subelem == NULL) | |
2150 | return NULL; | |
2151 | ||
2152 | pos = subelem; | |
2153 | *pos++ = FTIE_SUBELEM_IGTK; | |
2154 | *pos++ = subelem_len - 2; | |
2155 | WPA_PUT_LE16(pos, gsm->GN_igtk); | |
2156 | pos += 2; | |
9008a3e4 | 2157 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos); |
b27f13ed | 2158 | pos += 6; |
ff89afb7 | 2159 | *pos++ = WPA_IGTK_LEN; |
98cd3d1c | 2160 | if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, WPA_IGTK_LEN / 8, |
b27f13ed JM |
2161 | gsm->IGTK[gsm->GN_igtk - 4], pos)) { |
2162 | os_free(subelem); | |
2163 | return NULL; | |
2164 | } | |
2165 | ||
2166 | *len = subelem_len; | |
2167 | return subelem; | |
2168 | } | |
2169 | #endif /* CONFIG_IEEE80211W */ | |
2170 | ||
2171 | ||
88b32a99 SP |
2172 | static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm, |
2173 | u8 *pos, u8 *end, u8 id, u8 descr_count, | |
f238cf9f JM |
2174 | const u8 *ies, size_t ies_len) |
2175 | { | |
2176 | struct ieee802_11_elems parse; | |
2177 | struct rsn_rdie *rdie; | |
2178 | ||
2179 | wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d", | |
2180 | id, descr_count); | |
2181 | wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)", | |
2182 | ies, ies_len); | |
2183 | ||
2184 | if (end - pos < (int) sizeof(*rdie)) { | |
2185 | wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE"); | |
2186 | return pos; | |
2187 | } | |
2188 | ||
2189 | *pos++ = WLAN_EID_RIC_DATA; | |
2190 | *pos++ = sizeof(*rdie); | |
2191 | rdie = (struct rsn_rdie *) pos; | |
2192 | rdie->id = id; | |
2193 | rdie->descr_count = 0; | |
2194 | rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS); | |
2195 | pos += sizeof(*rdie); | |
2196 | ||
2197 | if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) == | |
2198 | ParseFailed) { | |
2199 | wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs"); | |
2200 | rdie->status_code = | |
2201 | host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
2202 | return pos; | |
2203 | } | |
2204 | ||
25310368 | 2205 | if (parse.wmm_tspec) { |
f238cf9f | 2206 | struct wmm_tspec_element *tspec; |
f238cf9f JM |
2207 | |
2208 | if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) { | |
2209 | wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE " | |
2210 | "(%d)", (int) parse.wmm_tspec_len); | |
2211 | rdie->status_code = | |
2212 | host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
2213 | return pos; | |
2214 | } | |
2215 | if (end - pos < (int) sizeof(*tspec)) { | |
2216 | wpa_printf(MSG_ERROR, "FT: Not enough room for " | |
2217 | "response TSPEC"); | |
2218 | rdie->status_code = | |
2219 | host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
2220 | return pos; | |
2221 | } | |
2222 | tspec = (struct wmm_tspec_element *) pos; | |
2223 | os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec)); | |
25310368 JM |
2224 | } |
2225 | ||
2226 | #ifdef NEED_AP_MLME | |
2227 | if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) { | |
2228 | int res; | |
2229 | ||
2230 | res = wmm_process_tspec((struct wmm_tspec_element *) pos); | |
f238cf9f JM |
2231 | wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res); |
2232 | if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS) | |
2233 | rdie->status_code = | |
2234 | host_to_le16(WLAN_STATUS_INVALID_PARAMETERS); | |
2235 | else if (res == WMM_ADDTS_STATUS_REFUSED) | |
2236 | rdie->status_code = | |
2237 | host_to_le16(WLAN_STATUS_REQUEST_DECLINED); | |
2238 | else { | |
2239 | /* TSPEC accepted; include updated TSPEC in response */ | |
2240 | rdie->descr_count = 1; | |
25310368 | 2241 | pos += sizeof(struct wmm_tspec_element); |
f238cf9f JM |
2242 | } |
2243 | return pos; | |
2244 | } | |
fe6bdb77 | 2245 | #endif /* NEED_AP_MLME */ |
f238cf9f | 2246 | |
88b32a99 | 2247 | if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) { |
88b32a99 SP |
2248 | int res; |
2249 | ||
88b32a99 | 2250 | res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos, |
25310368 | 2251 | sizeof(struct wmm_tspec_element)); |
88b32a99 SP |
2252 | if (res >= 0) { |
2253 | if (res) | |
2254 | rdie->status_code = host_to_le16(res); | |
2255 | else { | |
2256 | /* TSPEC accepted; include updated TSPEC in | |
2257 | * response */ | |
006309b5 | 2258 | rdie->descr_count = 1; |
25310368 | 2259 | pos += sizeof(struct wmm_tspec_element); |
88b32a99 SP |
2260 | } |
2261 | return pos; | |
2262 | } | |
2263 | } | |
2264 | ||
f238cf9f JM |
2265 | wpa_printf(MSG_DEBUG, "FT: No supported resource requested"); |
2266 | rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); | |
2267 | return pos; | |
2268 | } | |
2269 | ||
2270 | ||
88b32a99 SP |
2271 | static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end, |
2272 | const u8 *ric, size_t ric_len) | |
f238cf9f JM |
2273 | { |
2274 | const u8 *rpos, *start; | |
2275 | const struct rsn_rdie *rdie; | |
2276 | ||
2277 | wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len); | |
2278 | ||
2279 | rpos = ric; | |
2280 | while (rpos + sizeof(*rdie) < ric + ric_len) { | |
2281 | if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) || | |
2282 | rpos + 2 + rpos[1] > ric + ric_len) | |
2283 | break; | |
2284 | rdie = (const struct rsn_rdie *) (rpos + 2); | |
2285 | rpos += 2 + rpos[1]; | |
2286 | start = rpos; | |
2287 | ||
2288 | while (rpos + 2 <= ric + ric_len && | |
2289 | rpos + 2 + rpos[1] <= ric + ric_len) { | |
2290 | if (rpos[0] == WLAN_EID_RIC_DATA) | |
2291 | break; | |
2292 | rpos += 2 + rpos[1]; | |
2293 | } | |
88b32a99 | 2294 | pos = wpa_ft_process_rdie(sm, pos, end, rdie->id, |
f238cf9f JM |
2295 | rdie->descr_count, |
2296 | start, rpos - start); | |
2297 | } | |
2298 | ||
2299 | return pos; | |
2300 | } | |
2301 | ||
2302 | ||
6fc6879b | 2303 | u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos, |
f238cf9f JM |
2304 | size_t max_len, int auth_alg, |
2305 | const u8 *req_ies, size_t req_ies_len) | |
6fc6879b | 2306 | { |
738a1cb2 JM |
2307 | u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL; |
2308 | size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0; | |
6fc6879b JM |
2309 | int res; |
2310 | struct wpa_auth_config *conf; | |
2311 | struct rsn_ftie *_ftie; | |
f238cf9f JM |
2312 | struct wpa_ft_ies parse; |
2313 | u8 *ric_start; | |
6e80516a | 2314 | u8 *anonce, *snonce; |
2f373878 JM |
2315 | const u8 *kck; |
2316 | size_t kck_len; | |
6fc6879b JM |
2317 | |
2318 | if (sm == NULL) | |
2319 | return pos; | |
2320 | ||
2321 | conf = &sm->wpa_auth->conf; | |
2322 | ||
aa189ac9 | 2323 | if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt)) |
6fc6879b JM |
2324 | return pos; |
2325 | ||
2326 | end = pos + max_len; | |
2327 | ||
738a1cb2 JM |
2328 | if (auth_alg == WLAN_AUTH_FT) { |
2329 | /* | |
2330 | * RSN (only present if this is a Reassociation Response and | |
2331 | * part of a fast BSS transition) | |
2332 | */ | |
2333 | res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name); | |
2334 | if (res < 0) | |
2335 | return pos; | |
2336 | rsnie = pos; | |
2337 | rsnie_len = res; | |
2338 | pos += res; | |
2339 | } | |
6fc6879b JM |
2340 | |
2341 | /* Mobility Domain Information */ | |
2342 | res = wpa_write_mdie(conf, pos, end - pos); | |
2343 | if (res < 0) | |
2344 | return pos; | |
2345 | mdie = pos; | |
2346 | mdie_len = res; | |
2347 | pos += res; | |
2348 | ||
2349 | /* Fast BSS Transition Information */ | |
2350 | if (auth_alg == WLAN_AUTH_FT) { | |
2351 | subelem = wpa_ft_gtk_subelem(sm, &subelem_len); | |
2352 | r0kh_id = sm->r0kh_id; | |
2353 | r0kh_id_len = sm->r0kh_id_len; | |
6e80516a JM |
2354 | anonce = sm->ANonce; |
2355 | snonce = sm->SNonce; | |
b27f13ed JM |
2356 | #ifdef CONFIG_IEEE80211W |
2357 | if (sm->mgmt_frame_prot) { | |
2358 | u8 *igtk; | |
2359 | size_t igtk_len; | |
2360 | u8 *nbuf; | |
2361 | igtk = wpa_ft_igtk_subelem(sm, &igtk_len); | |
2362 | if (igtk == NULL) { | |
2363 | os_free(subelem); | |
2364 | return pos; | |
2365 | } | |
2366 | nbuf = os_realloc(subelem, subelem_len + igtk_len); | |
2367 | if (nbuf == NULL) { | |
2368 | os_free(subelem); | |
2369 | os_free(igtk); | |
2370 | return pos; | |
2371 | } | |
2372 | subelem = nbuf; | |
2373 | os_memcpy(subelem + subelem_len, igtk, igtk_len); | |
2374 | subelem_len += igtk_len; | |
2375 | os_free(igtk); | |
2376 | } | |
2377 | #endif /* CONFIG_IEEE80211W */ | |
6fc6879b JM |
2378 | } else { |
2379 | r0kh_id = conf->r0_key_holder; | |
2380 | r0kh_id_len = conf->r0_key_holder_len; | |
6e80516a JM |
2381 | anonce = NULL; |
2382 | snonce = NULL; | |
6fc6879b | 2383 | } |
6e80516a | 2384 | res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos, |
6fc6879b JM |
2385 | end - pos, subelem, subelem_len); |
2386 | os_free(subelem); | |
2387 | if (res < 0) | |
2388 | return pos; | |
2389 | ftie = pos; | |
2390 | ftie_len = res; | |
2391 | pos += res; | |
2392 | ||
2393 | _ftie = (struct rsn_ftie *) (ftie + 2); | |
1f6e69e0 JM |
2394 | if (auth_alg == WLAN_AUTH_FT) |
2395 | _ftie->mic_control[1] = 3; /* Information element count */ | |
f238cf9f JM |
2396 | |
2397 | ric_start = pos; | |
2398 | if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) { | |
88b32a99 SP |
2399 | pos = wpa_ft_process_ric(sm, pos, end, parse.ric, |
2400 | parse.ric_len); | |
1f6e69e0 JM |
2401 | if (auth_alg == WLAN_AUTH_FT) |
2402 | _ftie->mic_control[1] += | |
2403 | ieee802_11_ie_count(ric_start, | |
2404 | pos - ric_start); | |
f238cf9f JM |
2405 | } |
2406 | if (ric_start == pos) | |
2407 | ric_start = NULL; | |
2408 | ||
2f373878 JM |
2409 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { |
2410 | kck = sm->PTK.kck2; | |
2411 | kck_len = sm->PTK.kck2_len; | |
2412 | } else { | |
2413 | kck = sm->PTK.kck; | |
2414 | kck_len = sm->PTK.kck_len; | |
2415 | } | |
1f6e69e0 | 2416 | if (auth_alg == WLAN_AUTH_FT && |
2f373878 | 2417 | wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 6, |
6fc6879b | 2418 | mdie, mdie_len, ftie, ftie_len, |
f238cf9f JM |
2419 | rsnie, rsnie_len, |
2420 | ric_start, ric_start ? pos - ric_start : 0, | |
2421 | _ftie->mic) < 0) | |
6fc6879b JM |
2422 | wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC"); |
2423 | ||
e44bd28c JM |
2424 | os_free(sm->assoc_resp_ftie); |
2425 | sm->assoc_resp_ftie = os_malloc(ftie_len); | |
2426 | if (sm->assoc_resp_ftie) | |
2427 | os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len); | |
2428 | ||
6fc6879b JM |
2429 | return pos; |
2430 | } | |
2431 | ||
2432 | ||
6fc6879b JM |
2433 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, |
2434 | int vlan_id, | |
71934751 | 2435 | enum wpa_alg alg, const u8 *addr, int idx, |
6fc6879b JM |
2436 | u8 *key, size_t key_len) |
2437 | { | |
cef8fac0 | 2438 | if (wpa_auth->cb->set_key == NULL) |
6fc6879b | 2439 | return -1; |
cef8fac0 JB |
2440 | return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx, |
2441 | key, key_len); | |
6fc6879b JM |
2442 | } |
2443 | ||
2444 | ||
0e84c254 | 2445 | void wpa_ft_install_ptk(struct wpa_state_machine *sm) |
6fc6879b | 2446 | { |
71934751 | 2447 | enum wpa_alg alg; |
6fc6879b JM |
2448 | int klen; |
2449 | ||
2450 | /* MLME-SETKEYS.request(PTK) */ | |
c3550295 JM |
2451 | alg = wpa_cipher_to_alg(sm->pairwise); |
2452 | klen = wpa_cipher_key_len(sm->pairwise); | |
2453 | if (!wpa_cipher_valid_pairwise(sm->pairwise)) { | |
0e84c254 JM |
2454 | wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip " |
2455 | "PTK configuration", sm->pairwise); | |
6fc6879b | 2456 | return; |
0e84c254 | 2457 | } |
6fc6879b | 2458 | |
0e3bd7ac MV |
2459 | if (sm->tk_already_set) { |
2460 | /* Must avoid TK reconfiguration to prevent clearing of TX/RX | |
2461 | * PN in the driver */ | |
2462 | wpa_printf(MSG_DEBUG, | |
2463 | "FT: Do not re-install same PTK to the driver"); | |
2464 | return; | |
2465 | } | |
2466 | ||
6fc6879b JM |
2467 | /* FIX: add STA entry to kernel/driver here? The set_key will fail |
2468 | * most likely without this.. At the moment, STA entry is added only | |
0e84c254 JM |
2469 | * after association has been completed. This function will be called |
2470 | * again after association to get the PTK configured, but that could be | |
2471 | * optimized by adding the STA entry earlier. | |
6fc6879b JM |
2472 | */ |
2473 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
98cd3d1c | 2474 | sm->PTK.tk, klen)) |
6fc6879b JM |
2475 | return; |
2476 | ||
2477 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
2478 | sm->pairwise_set = TRUE; | |
0e3bd7ac | 2479 | sm->tk_already_set = TRUE; |
6fc6879b JM |
2480 | } |
2481 | ||
2482 | ||
96590564 MB |
2483 | /* Derive PMK-R1 from PSK, check all available PSK */ |
2484 | static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm, | |
2485 | const u8 *req_pmk_r1_name, | |
17010c38 | 2486 | u8 *out_pmk_r1, int *out_pairwise, |
069b4e30 MB |
2487 | struct vlan_description *out_vlan, |
2488 | const u8 **out_identity, size_t *out_identity_len, | |
2489 | const u8 **out_radius_cui, | |
a6509e85 MB |
2490 | size_t *out_radius_cui_len, |
2491 | int *out_session_timeout) | |
96590564 MB |
2492 | { |
2493 | const u8 *pmk = NULL; | |
2494 | u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN]; | |
2495 | u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN]; | |
2496 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2497 | const u8 *mdid = wpa_auth->conf.mobility_domain; | |
2498 | const u8 *r0kh = sm->r0kh_id; | |
2499 | size_t r0kh_len = sm->r0kh_id_len; | |
2500 | const u8 *r1kh = wpa_auth->conf.r1_key_holder; | |
2501 | const u8 *ssid = wpa_auth->conf.ssid; | |
2502 | size_t ssid_len = wpa_auth->conf.ssid_len; | |
2503 | int pairwise; | |
2504 | ||
2505 | pairwise = sm->pairwise; | |
2506 | ||
2507 | for (;;) { | |
2508 | pmk = wpa_ft_get_psk(wpa_auth, sm->addr, sm->p2p_dev_addr, | |
2509 | pmk); | |
2510 | if (pmk == NULL) | |
2511 | break; | |
2512 | ||
364c064a JM |
2513 | if (wpa_derive_pmk_r0(pmk, PMK_LEN, ssid, ssid_len, mdid, r0kh, |
2514 | r0kh_len, sm->addr, | |
2515 | pmk_r0, pmk_r0_name) < 0 || | |
a3e18dbb JM |
2516 | wpa_derive_pmk_r1(pmk_r0, PMK_LEN, pmk_r0_name, r1kh, |
2517 | sm->addr, pmk_r1, pmk_r1_name) < 0 || | |
364c064a | 2518 | os_memcmp_const(pmk_r1_name, req_pmk_r1_name, |
96590564 MB |
2519 | WPA_PMK_NAME_LEN) != 0) |
2520 | continue; | |
2521 | ||
2522 | /* We found a PSK that matches the requested pmk_r1_name */ | |
2523 | wpa_printf(MSG_DEBUG, | |
2524 | "FT: Found PSK to generate PMK-R1 locally"); | |
2525 | os_memcpy(out_pmk_r1, pmk_r1, PMK_LEN); | |
2526 | if (out_pairwise) | |
2527 | *out_pairwise = pairwise; | |
17010c38 MB |
2528 | if (out_vlan && |
2529 | wpa_ft_get_vlan(sm->wpa_auth, sm->addr, out_vlan) < 0) { | |
2530 | wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " | |
2531 | MACSTR, MAC2STR(sm->addr)); | |
2532 | return -1; | |
2533 | } | |
2534 | ||
069b4e30 MB |
2535 | if (out_identity && out_identity_len) { |
2536 | *out_identity_len = wpa_ft_get_identity( | |
2537 | sm->wpa_auth, sm->addr, out_identity); | |
2538 | } | |
2539 | ||
2540 | if (out_radius_cui && out_radius_cui_len) { | |
2541 | *out_radius_cui_len = wpa_ft_get_radius_cui( | |
2542 | sm->wpa_auth, sm->addr, out_radius_cui); | |
2543 | } | |
2544 | ||
a6509e85 MB |
2545 | if (out_session_timeout) { |
2546 | *out_session_timeout = wpa_ft_get_session_timeout( | |
2547 | sm->wpa_auth, sm->addr); | |
2548 | } | |
2549 | ||
96590564 MB |
2550 | return 0; |
2551 | } | |
2552 | ||
2553 | wpa_printf(MSG_DEBUG, | |
2554 | "FT: Did not find PSK to generate PMK-R1 locally"); | |
2555 | return -1; | |
2556 | } | |
2557 | ||
2558 | ||
2559 | /* Detect the configuration the station asked for. | |
2560 | * Required to detect FT-PSK and pairwise cipher. | |
2561 | */ | |
2562 | static int wpa_ft_set_key_mgmt(struct wpa_state_machine *sm, | |
2563 | struct wpa_ft_ies *parse) | |
2564 | { | |
2565 | int key_mgmt, ciphers; | |
2566 | ||
2567 | if (sm->wpa_key_mgmt) | |
2568 | return 0; | |
2569 | ||
2570 | key_mgmt = parse->key_mgmt & sm->wpa_auth->conf.wpa_key_mgmt; | |
2571 | if (!key_mgmt) { | |
2572 | wpa_printf(MSG_DEBUG, "FT: Invalid key mgmt (0x%x) from " | |
2573 | MACSTR, parse->key_mgmt, MAC2STR(sm->addr)); | |
2574 | return -1; | |
2575 | } | |
2576 | if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) | |
2577 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X; | |
c22bb5bb JM |
2578 | #ifdef CONFIG_SHA384 |
2579 | else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X_SHA384) | |
2580 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X_SHA384; | |
2581 | #endif /* CONFIG_SHA384 */ | |
96590564 MB |
2582 | else if (key_mgmt & WPA_KEY_MGMT_FT_PSK) |
2583 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK; | |
5aa08153 JM |
2584 | #ifdef CONFIG_FILS |
2585 | else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256) | |
2586 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA256; | |
2587 | else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384) | |
2588 | sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_FILS_SHA384; | |
2589 | #endif /* CONFIG_FILS */ | |
96590564 MB |
2590 | ciphers = parse->pairwise_cipher & sm->wpa_auth->conf.rsn_pairwise; |
2591 | if (!ciphers) { | |
2592 | wpa_printf(MSG_DEBUG, "FT: Invalid pairwise cipher (0x%x) from " | |
2593 | MACSTR, | |
2594 | parse->pairwise_cipher, MAC2STR(sm->addr)); | |
2595 | return -1; | |
2596 | } | |
2597 | sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0); | |
2598 | ||
2599 | return 0; | |
2600 | } | |
2601 | ||
2602 | ||
4ddca814 JM |
2603 | static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth, |
2604 | struct wpa_state_machine *sm, | |
2605 | const u8 *r0kh_id, size_t r0kh_id_len, | |
2606 | const u8 *req_pmk_r0_name, | |
2607 | const u8 *req_pmk_r1_name, | |
17010c38 | 2608 | u8 *out_pmk_r1, int *out_pairwise, |
069b4e30 MB |
2609 | struct vlan_description *vlan, |
2610 | const u8 **identity, size_t *identity_len, | |
2611 | const u8 **radius_cui, | |
a6509e85 MB |
2612 | size_t *radius_cui_len, |
2613 | int *out_session_timeout) | |
4ddca814 JM |
2614 | { |
2615 | struct wpa_auth_config *conf = &wpa_auth->conf; | |
2616 | const struct wpa_ft_pmk_r0_sa *r0; | |
2617 | u8 pmk_r1_name[WPA_PMK_NAME_LEN]; | |
3a3e2832 | 2618 | int expires_in = 0; |
a6509e85 MB |
2619 | int session_timeout = 0; |
2620 | struct os_reltime now; | |
4ddca814 JM |
2621 | |
2622 | if (conf->r0_key_holder_len != r0kh_id_len || | |
2623 | os_memcmp(conf->r0_key_holder, r0kh_id, conf->r0_key_holder_len) != | |
2624 | 0) | |
2625 | return -1; /* not our R0KH-ID */ | |
2626 | ||
2627 | wpa_printf(MSG_DEBUG, "FT: STA R0KH-ID matching local configuration"); | |
2628 | if (wpa_ft_fetch_pmk_r0(sm->wpa_auth, sm->addr, req_pmk_r0_name, &r0) < | |
2629 | 0) | |
2630 | return -1; /* no matching PMKR0Name in local cache */ | |
2631 | ||
2632 | wpa_printf(MSG_DEBUG, "FT: Requested PMKR0Name found in local cache"); | |
2633 | ||
a3e18dbb JM |
2634 | if (wpa_derive_pmk_r1(r0->pmk_r0, r0->pmk_r0_len, r0->pmk_r0_name, |
2635 | conf->r1_key_holder, | |
4ddca814 JM |
2636 | sm->addr, out_pmk_r1, pmk_r1_name) < 0) |
2637 | return -1; | |
a3e18dbb | 2638 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", out_pmk_r1, r0->pmk_r0_len); |
4ddca814 JM |
2639 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN); |
2640 | ||
a6509e85 MB |
2641 | os_get_reltime(&now); |
2642 | if (r0->expiration) | |
3a3e2832 | 2643 | expires_in = r0->expiration - now.sec; |
a6509e85 MB |
2644 | |
2645 | if (r0->session_timeout) | |
2646 | session_timeout = r0->session_timeout - now.sec; | |
3a3e2832 | 2647 | |
a3e18dbb JM |
2648 | wpa_ft_store_pmk_r1(wpa_auth, sm->addr, out_pmk_r1, r0->pmk_r0_len, |
2649 | pmk_r1_name, | |
a6509e85 | 2650 | sm->pairwise, r0->vlan, expires_in, session_timeout, |
069b4e30 MB |
2651 | r0->identity, r0->identity_len, |
2652 | r0->radius_cui, r0->radius_cui_len); | |
4ddca814 JM |
2653 | |
2654 | *out_pairwise = sm->pairwise; | |
17010c38 MB |
2655 | if (vlan) { |
2656 | if (r0->vlan) | |
2657 | *vlan = *r0->vlan; | |
2658 | else | |
2659 | os_memset(vlan, 0, sizeof(*vlan)); | |
2660 | } | |
069b4e30 MB |
2661 | |
2662 | if (identity && identity_len) { | |
2663 | *identity = r0->identity; | |
2664 | *identity_len = r0->identity_len; | |
2665 | } | |
2666 | ||
2667 | if (radius_cui && radius_cui_len) { | |
2668 | *radius_cui = r0->radius_cui; | |
2669 | *radius_cui_len = r0->radius_cui_len; | |
2670 | } | |
2671 | ||
a6509e85 MB |
2672 | *out_session_timeout = session_timeout; |
2673 | ||
4ddca814 JM |
2674 | return 0; |
2675 | } | |
2676 | ||
2677 | ||
692ec305 | 2678 | static int wpa_ft_process_auth_req(struct wpa_state_machine *sm, |
6fc6879b JM |
2679 | const u8 *ies, size_t ies_len, |
2680 | u8 **resp_ies, size_t *resp_ies_len) | |
2681 | { | |
2682 | struct rsn_mdie *mdie; | |
2683 | struct rsn_ftie *ftie; | |
a3e18dbb | 2684 | u8 pmk_r1[PMK_LEN_MAX], pmk_r1_name[WPA_PMK_NAME_LEN]; |
6fc6879b JM |
2685 | u8 ptk_name[WPA_PMK_NAME_LEN]; |
2686 | struct wpa_auth_config *conf; | |
2687 | struct wpa_ft_ies parse; | |
98cd3d1c | 2688 | size_t buflen; |
6fc6879b JM |
2689 | int ret; |
2690 | u8 *pos, *end; | |
a6509e85 | 2691 | int pairwise, session_timeout = 0; |
17010c38 | 2692 | struct vlan_description vlan; |
069b4e30 MB |
2693 | const u8 *identity, *radius_cui; |
2694 | size_t identity_len = 0, radius_cui_len = 0; | |
a3e18dbb JM |
2695 | int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt); |
2696 | size_t pmk_r1_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; | |
6fc6879b JM |
2697 | |
2698 | *resp_ies = NULL; | |
2699 | *resp_ies_len = 0; | |
2700 | ||
2701 | sm->pmk_r1_name_valid = 0; | |
2702 | conf = &sm->wpa_auth->conf; | |
2703 | ||
2704 | wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs", | |
2705 | ies, ies_len); | |
2706 | ||
2707 | if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) { | |
2708 | wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs"); | |
2709 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2710 | } | |
2711 | ||
2712 | mdie = (struct rsn_mdie *) parse.mdie; | |
2713 | if (mdie == NULL || parse.mdie_len < sizeof(*mdie) || | |
2714 | os_memcmp(mdie->mobility_domain, | |
2715 | sm->wpa_auth->conf.mobility_domain, | |
2716 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
2717 | wpa_printf(MSG_DEBUG, "FT: Invalid MDIE"); | |
2718 | return WLAN_STATUS_INVALID_MDIE; | |
2719 | } | |
2720 | ||
2721 | ftie = (struct rsn_ftie *) parse.ftie; | |
2722 | if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) { | |
2723 | wpa_printf(MSG_DEBUG, "FT: Invalid FTIE"); | |
2724 | return WLAN_STATUS_INVALID_FTIE; | |
2725 | } | |
2726 | ||
2727 | os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN); | |
2728 | ||
2729 | if (parse.r0kh_id == NULL) { | |
2730 | wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID"); | |
2731 | return WLAN_STATUS_INVALID_FTIE; | |
2732 | } | |
2733 | ||
2734 | wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID", | |
2735 | parse.r0kh_id, parse.r0kh_id_len); | |
2736 | os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len); | |
2737 | sm->r0kh_id_len = parse.r0kh_id_len; | |
2738 | ||
2739 | if (parse.rsn_pmkid == NULL) { | |
2740 | wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE"); | |
2741 | return WLAN_STATUS_INVALID_PMKID; | |
2742 | } | |
2743 | ||
96590564 MB |
2744 | if (wpa_ft_set_key_mgmt(sm, &parse) < 0) |
2745 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2746 | ||
6fc6879b JM |
2747 | wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name", |
2748 | parse.rsn_pmkid, WPA_PMK_NAME_LEN); | |
364c064a JM |
2749 | if (wpa_derive_pmk_r1_name(parse.rsn_pmkid, |
2750 | sm->wpa_auth->conf.r1_key_holder, sm->addr, | |
2751 | pmk_r1_name) < 0) | |
2752 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
6fc6879b JM |
2753 | wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name", |
2754 | pmk_r1_name, WPA_PMK_NAME_LEN); | |
2755 | ||
96590564 MB |
2756 | if (conf->ft_psk_generate_local && |
2757 | wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) { | |
17010c38 | 2758 | if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise, |
069b4e30 | 2759 | &vlan, &identity, &identity_len, |
a6509e85 MB |
2760 | &radius_cui, &radius_cui_len, |
2761 | &session_timeout) < 0) | |
96590564 | 2762 | return WLAN_STATUS_INVALID_PMKID; |
4ddca814 JM |
2763 | wpa_printf(MSG_DEBUG, |
2764 | "FT: Generated PMK-R1 for FT-PSK locally"); | |
96590564 | 2765 | } else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, |
a3e18dbb JM |
2766 | pmk_r1, &pmk_r1_len, &pairwise, &vlan, |
2767 | &identity, &identity_len, &radius_cui, | |
a6509e85 | 2768 | &radius_cui_len, &session_timeout) < 0) { |
4ddca814 JM |
2769 | wpa_printf(MSG_DEBUG, |
2770 | "FT: No PMK-R1 available in local cache for the requested PMKR1Name"); | |
2771 | if (wpa_ft_local_derive_pmk_r1(sm->wpa_auth, sm, | |
2772 | parse.r0kh_id, parse.r0kh_id_len, | |
2773 | parse.rsn_pmkid, | |
17010c38 | 2774 | pmk_r1_name, pmk_r1, &pairwise, |
069b4e30 | 2775 | &vlan, &identity, &identity_len, |
a6509e85 MB |
2776 | &radius_cui, &radius_cui_len, |
2777 | &session_timeout) == 0) { | |
4ddca814 JM |
2778 | wpa_printf(MSG_DEBUG, |
2779 | "FT: Generated PMK-R1 based on local PMK-R0"); | |
2780 | goto pmk_r1_derived; | |
2781 | } | |
2782 | ||
692ec305 | 2783 | if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) { |
3a46cf93 MB |
2784 | wpa_printf(MSG_DEBUG, |
2785 | "FT: Did not have matching PMK-R1 and either unknown or blocked R0KH-ID or NAK from R0KH"); | |
6fc6879b JM |
2786 | return WLAN_STATUS_INVALID_PMKID; |
2787 | } | |
2788 | ||
692ec305 | 2789 | return -1; /* Status pending */ |
4ddca814 JM |
2790 | } else { |
2791 | wpa_printf(MSG_DEBUG, "FT: Found PMKR1Name from local cache"); | |
6fc6879b JM |
2792 | } |
2793 | ||
4ddca814 | 2794 | pmk_r1_derived: |
a3e18dbb | 2795 | wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, pmk_r1_len); |
6fc6879b JM |
2796 | sm->pmk_r1_name_valid = 1; |
2797 | os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN); | |
2798 | ||
3642c431 | 2799 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { |
6fc6879b JM |
2800 | wpa_printf(MSG_DEBUG, "FT: Failed to get random data for " |
2801 | "ANonce"); | |
2802 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2803 | } | |
2804 | ||
2805 | wpa_hexdump(MSG_DEBUG, "FT: Received SNonce", | |
2806 | sm->SNonce, WPA_NONCE_LEN); | |
2807 | wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce", | |
2808 | sm->ANonce, WPA_NONCE_LEN); | |
2809 | ||
a3e18dbb JM |
2810 | if (wpa_pmk_r1_to_ptk(pmk_r1, pmk_r1_len, sm->SNonce, sm->ANonce, |
2811 | sm->addr, sm->wpa_auth->addr, pmk_r1_name, | |
98cd3d1c JM |
2812 | &sm->PTK, ptk_name, sm->wpa_key_mgmt, |
2813 | pairwise) < 0) | |
2814 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
6fc6879b | 2815 | |
0e84c254 | 2816 | sm->pairwise = pairwise; |
3d4d2348 | 2817 | sm->PTK_valid = TRUE; |
0e3bd7ac | 2818 | sm->tk_already_set = FALSE; |
6fc6879b JM |
2819 | wpa_ft_install_ptk(sm); |
2820 | ||
17010c38 MB |
2821 | if (wpa_ft_set_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) { |
2822 | wpa_printf(MSG_DEBUG, "FT: Failed to configure VLAN"); | |
2823 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2824 | } | |
069b4e30 MB |
2825 | if (wpa_ft_set_identity(sm->wpa_auth, sm->addr, |
2826 | identity, identity_len) < 0 || | |
2827 | wpa_ft_set_radius_cui(sm->wpa_auth, sm->addr, | |
2828 | radius_cui, radius_cui_len) < 0) { | |
2829 | wpa_printf(MSG_DEBUG, "FT: Failed to configure identity/CUI"); | |
2830 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2831 | } | |
a6509e85 | 2832 | wpa_ft_set_session_timeout(sm->wpa_auth, sm->addr, session_timeout); |
17010c38 | 2833 | |
6fc6879b JM |
2834 | buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) + |
2835 | 2 + FT_R1KH_ID_LEN + 200; | |
2836 | *resp_ies = os_zalloc(buflen); | |
a8e25dee JM |
2837 | if (*resp_ies == NULL) |
2838 | goto fail; | |
6fc6879b JM |
2839 | |
2840 | pos = *resp_ies; | |
2841 | end = *resp_ies + buflen; | |
2842 | ||
2843 | ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid); | |
a8e25dee JM |
2844 | if (ret < 0) |
2845 | goto fail; | |
6fc6879b JM |
2846 | pos += ret; |
2847 | ||
2848 | ret = wpa_write_mdie(conf, pos, end - pos); | |
a8e25dee JM |
2849 | if (ret < 0) |
2850 | goto fail; | |
6fc6879b JM |
2851 | pos += ret; |
2852 | ||
2853 | ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len, | |
2854 | sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0); | |
a8e25dee JM |
2855 | if (ret < 0) |
2856 | goto fail; | |
6fc6879b JM |
2857 | pos += ret; |
2858 | ||
2859 | *resp_ies_len = pos - *resp_ies; | |
2860 | ||
2861 | return WLAN_STATUS_SUCCESS; | |
a8e25dee JM |
2862 | fail: |
2863 | os_free(*resp_ies); | |
2864 | *resp_ies = NULL; | |
2865 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
6fc6879b JM |
2866 | } |
2867 | ||
2868 | ||
2869 | void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid, | |
2870 | u16 auth_transaction, const u8 *ies, size_t ies_len, | |
2871 | void (*cb)(void *ctx, const u8 *dst, const u8 *bssid, | |
2872 | u16 auth_transaction, u16 status, | |
2873 | const u8 *ies, size_t ies_len), | |
2874 | void *ctx) | |
2875 | { | |
2876 | u16 status; | |
2877 | u8 *resp_ies; | |
2878 | size_t resp_ies_len; | |
692ec305 | 2879 | int res; |
6fc6879b JM |
2880 | |
2881 | if (sm == NULL) { | |
2882 | wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but " | |
2883 | "WPA SM not available"); | |
2884 | return; | |
2885 | } | |
2886 | ||
2887 | wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR | |
2888 | " BSSID=" MACSTR " transaction=%d", | |
2889 | MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction); | |
692ec305 JM |
2890 | sm->ft_pending_cb = cb; |
2891 | sm->ft_pending_cb_ctx = ctx; | |
2892 | sm->ft_pending_auth_transaction = auth_transaction; | |
3a46cf93 | 2893 | sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries; |
692ec305 JM |
2894 | res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies, |
2895 | &resp_ies_len); | |
2896 | if (res < 0) { | |
2897 | wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available"); | |
2898 | return; | |
2899 | } | |
2900 | status = res; | |
6fc6879b JM |
2901 | |
2902 | wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR | |
2903 | " auth_transaction=%d status=%d", | |
2904 | MAC2STR(sm->addr), auth_transaction + 1, status); | |
2905 | wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len); | |
2906 | cb(ctx, sm->addr, bssid, auth_transaction + 1, status, | |
2907 | resp_ies, resp_ies_len); | |
2908 | os_free(resp_ies); | |
2909 | } | |
2910 | ||
2911 | ||
2912 | u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies, | |
2913 | size_t ies_len) | |
2914 | { | |
2915 | struct wpa_ft_ies parse; | |
2916 | struct rsn_mdie *mdie; | |
2917 | struct rsn_ftie *ftie; | |
98cd3d1c JM |
2918 | u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; |
2919 | size_t mic_len = 16; | |
8aaf894d | 2920 | unsigned int count; |
2f373878 JM |
2921 | const u8 *kck; |
2922 | size_t kck_len; | |
6fc6879b JM |
2923 | |
2924 | if (sm == NULL) | |
2925 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2926 | ||
2927 | wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len); | |
2928 | ||
2929 | if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) { | |
2930 | wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs"); | |
2931 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2932 | } | |
2933 | ||
2934 | if (parse.rsn == NULL) { | |
2935 | wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req"); | |
2936 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
2937 | } | |
2938 | ||
2939 | if (parse.rsn_pmkid == NULL) { | |
2940 | wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE"); | |
2941 | return WLAN_STATUS_INVALID_PMKID; | |
2942 | } | |
2943 | ||
870834a1 JM |
2944 | if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) |
2945 | != 0) { | |
6fc6879b JM |
2946 | wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match " |
2947 | "with the PMKR1Name derived from auth request"); | |
2948 | return WLAN_STATUS_INVALID_PMKID; | |
2949 | } | |
2950 | ||
2951 | mdie = (struct rsn_mdie *) parse.mdie; | |
2952 | if (mdie == NULL || parse.mdie_len < sizeof(*mdie) || | |
2953 | os_memcmp(mdie->mobility_domain, | |
2954 | sm->wpa_auth->conf.mobility_domain, | |
2955 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
2956 | wpa_printf(MSG_DEBUG, "FT: Invalid MDIE"); | |
2957 | return WLAN_STATUS_INVALID_MDIE; | |
2958 | } | |
2959 | ||
2960 | ftie = (struct rsn_ftie *) parse.ftie; | |
2961 | if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) { | |
2962 | wpa_printf(MSG_DEBUG, "FT: Invalid FTIE"); | |
2963 | return WLAN_STATUS_INVALID_FTIE; | |
2964 | } | |
2965 | ||
0ae145cd JM |
2966 | if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) { |
2967 | wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE"); | |
2968 | wpa_hexdump(MSG_DEBUG, "FT: Received SNonce", | |
2969 | ftie->snonce, WPA_NONCE_LEN); | |
2970 | wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce", | |
2971 | sm->SNonce, WPA_NONCE_LEN); | |
0a63635e | 2972 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
2973 | } |
2974 | ||
2975 | if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) { | |
2976 | wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE"); | |
2977 | wpa_hexdump(MSG_DEBUG, "FT: Received ANonce", | |
2978 | ftie->anonce, WPA_NONCE_LEN); | |
2979 | wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce", | |
2980 | sm->ANonce, WPA_NONCE_LEN); | |
0a63635e | 2981 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
2982 | } |
2983 | ||
2984 | ||
2985 | if (parse.r0kh_id == NULL) { | |
2986 | wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE"); | |
0a63635e | 2987 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
2988 | } |
2989 | ||
2990 | if (parse.r0kh_id_len != sm->r0kh_id_len || | |
870834a1 JM |
2991 | os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) |
2992 | { | |
0ae145cd JM |
2993 | wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with " |
2994 | "the current R0KH-ID"); | |
2995 | wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE", | |
2996 | parse.r0kh_id, parse.r0kh_id_len); | |
2997 | wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID", | |
2998 | sm->r0kh_id, sm->r0kh_id_len); | |
0a63635e | 2999 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
3000 | } |
3001 | ||
3002 | if (parse.r1kh_id == NULL) { | |
3003 | wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE"); | |
0a63635e | 3004 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
3005 | } |
3006 | ||
870834a1 JM |
3007 | if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder, |
3008 | FT_R1KH_ID_LEN) != 0) { | |
0ae145cd JM |
3009 | wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in " |
3010 | "ReassocReq"); | |
3011 | wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE", | |
3012 | parse.r1kh_id, FT_R1KH_ID_LEN); | |
3013 | wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID", | |
3014 | sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN); | |
0a63635e | 3015 | return WLAN_STATUS_INVALID_FTIE; |
0ae145cd JM |
3016 | } |
3017 | ||
3018 | if (parse.rsn_pmkid == NULL || | |
870834a1 JM |
3019 | os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) |
3020 | { | |
0ae145cd JM |
3021 | wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in " |
3022 | "RSNIE (pmkid=%d)", !!parse.rsn_pmkid); | |
0a63635e | 3023 | return WLAN_STATUS_INVALID_PMKID; |
0ae145cd JM |
3024 | } |
3025 | ||
8aaf894d JM |
3026 | count = 3; |
3027 | if (parse.ric) | |
c284b461 | 3028 | count += ieee802_11_ie_count(parse.ric, parse.ric_len); |
8aaf894d JM |
3029 | if (ftie->mic_control[1] != count) { |
3030 | wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC " | |
3031 | "Control: received %u expected %u", | |
3032 | ftie->mic_control[1], count); | |
0a63635e | 3033 | return WLAN_STATUS_UNSPECIFIED_FAILURE; |
8aaf894d JM |
3034 | } |
3035 | ||
2f373878 JM |
3036 | if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) { |
3037 | kck = sm->PTK.kck2; | |
3038 | kck_len = sm->PTK.kck2_len; | |
3039 | } else { | |
3040 | kck = sm->PTK.kck; | |
3041 | kck_len = sm->PTK.kck_len; | |
3042 | } | |
3043 | if (wpa_ft_mic(kck, kck_len, sm->addr, sm->wpa_auth->addr, 5, | |
6fc6879b JM |
3044 | parse.mdie - 2, parse.mdie_len + 2, |
3045 | parse.ftie - 2, parse.ftie_len + 2, | |
babfbf15 JM |
3046 | parse.rsn - 2, parse.rsn_len + 2, |
3047 | parse.ric, parse.ric_len, | |
6fc6879b JM |
3048 | mic) < 0) { |
3049 | wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC"); | |
3050 | return WLAN_STATUS_UNSPECIFIED_FAILURE; | |
3051 | } | |
3052 | ||
98cd3d1c | 3053 | if (os_memcmp_const(mic, ftie->mic, mic_len) != 0) { |
6fc6879b | 3054 | wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE"); |
88b32a99 SP |
3055 | wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR, |
3056 | MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr)); | |
98cd3d1c JM |
3057 | wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", |
3058 | ftie->mic, mic_len); | |
3059 | wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len); | |
88b32a99 SP |
3060 | wpa_hexdump(MSG_MSGDUMP, "FT: MDIE", |
3061 | parse.mdie - 2, parse.mdie_len + 2); | |
3062 | wpa_hexdump(MSG_MSGDUMP, "FT: FTIE", | |
3063 | parse.ftie - 2, parse.ftie_len + 2); | |
3064 | wpa_hexdump(MSG_MSGDUMP, "FT: RSN", | |
3065 | parse.rsn - 2, parse.rsn_len + 2); | |
6fc6879b JM |
3066 | return WLAN_STATUS_INVALID_FTIE; |
3067 | } | |
3068 | ||
3069 | return WLAN_STATUS_SUCCESS; | |
3070 | } | |
3071 | ||
3072 | ||
3073 | int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len) | |
3074 | { | |
3075 | const u8 *sta_addr, *target_ap; | |
3076 | const u8 *ies; | |
3077 | size_t ies_len; | |
3078 | u8 action; | |
3079 | struct ft_rrb_frame *frame; | |
3080 | ||
3081 | if (sm == NULL) | |
3082 | return -1; | |
3083 | ||
3084 | /* | |
3085 | * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6] | |
3086 | * FT Request action frame body[variable] | |
3087 | */ | |
3088 | ||
3089 | if (len < 14) { | |
3090 | wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame " | |
3091 | "(len=%lu)", (unsigned long) len); | |
3092 | return -1; | |
3093 | } | |
3094 | ||
3095 | action = data[1]; | |
3096 | sta_addr = data + 2; | |
3097 | target_ap = data + 8; | |
3098 | ies = data + 14; | |
3099 | ies_len = len - 14; | |
3100 | ||
3101 | wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR | |
3102 | " Target AP=" MACSTR " Action=%d)", | |
3103 | MAC2STR(sta_addr), MAC2STR(target_ap), action); | |
3104 | ||
3105 | if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) { | |
3106 | wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: " | |
3107 | "STA=" MACSTR " STA-Address=" MACSTR, | |
3108 | MAC2STR(sm->addr), MAC2STR(sta_addr)); | |
3109 | return -1; | |
3110 | } | |
3111 | ||
3112 | /* | |
3113 | * Do some sanity checking on the target AP address (not own and not | |
3114 | * broadcast. This could be extended to filter based on a list of known | |
3115 | * APs in the MD (if such a list were configured). | |
3116 | */ | |
3117 | if ((target_ap[0] & 0x01) || | |
3118 | os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) { | |
3119 | wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action " | |
3120 | "frame"); | |
3121 | return -1; | |
3122 | } | |
3123 | ||
3124 | wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len); | |
3125 | ||
1940559e JM |
3126 | if (!sm->wpa_auth->conf.ft_over_ds) { |
3127 | wpa_printf(MSG_DEBUG, "FT: Over-DS option disabled - reject"); | |
3128 | return -1; | |
3129 | } | |
3130 | ||
6fc6879b JM |
3131 | /* RRB - Forward action frame to the target AP */ |
3132 | frame = os_malloc(sizeof(*frame) + len); | |
2c48211c JM |
3133 | if (frame == NULL) |
3134 | return -1; | |
6fc6879b JM |
3135 | frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; |
3136 | frame->packet_type = FT_PACKET_REQUEST; | |
3137 | frame->action_length = host_to_le16(len); | |
3138 | os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN); | |
3139 | os_memcpy(frame + 1, data, len); | |
3140 | ||
3141 | wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame, | |
3142 | sizeof(*frame) + len); | |
3143 | os_free(frame); | |
3144 | ||
3145 | return 0; | |
3146 | } | |
3147 | ||
3148 | ||
692ec305 JM |
3149 | static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid, |
3150 | u16 auth_transaction, u16 resp, | |
3151 | const u8 *ies, size_t ies_len) | |
3152 | { | |
3153 | struct wpa_state_machine *sm = ctx; | |
3154 | wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR, | |
3155 | MAC2STR(sm->addr)); | |
3156 | wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr, | |
3157 | WLAN_STATUS_SUCCESS, ies, ies_len); | |
3158 | } | |
3159 | ||
3160 | ||
6fc6879b JM |
3161 | static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth, |
3162 | const u8 *current_ap, const u8 *sta_addr, | |
3163 | const u8 *body, size_t len) | |
3164 | { | |
3165 | struct wpa_state_machine *sm; | |
3166 | u16 status; | |
692ec305 JM |
3167 | u8 *resp_ies; |
3168 | size_t resp_ies_len; | |
3169 | int res; | |
6fc6879b JM |
3170 | |
3171 | sm = wpa_ft_add_sta(wpa_auth, sta_addr); | |
3172 | if (sm == NULL) { | |
3173 | wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on " | |
3174 | "RRB Request"); | |
3175 | return -1; | |
3176 | } | |
3177 | ||
3178 | wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len); | |
3179 | ||
692ec305 JM |
3180 | sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb; |
3181 | sm->ft_pending_cb_ctx = sm; | |
3182 | os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN); | |
3a46cf93 | 3183 | sm->ft_pending_pull_left_retries = sm->wpa_auth->conf.rkh_pull_retries; |
692ec305 JM |
3184 | res = wpa_ft_process_auth_req(sm, body, len, &resp_ies, |
3185 | &resp_ies_len); | |
3186 | if (res < 0) { | |
3187 | wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response"); | |
3188 | return 0; | |
3189 | } | |
3190 | status = res; | |
3191 | ||
3192 | res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status, | |
3193 | resp_ies, resp_ies_len); | |
3194 | os_free(resp_ies); | |
3195 | return res; | |
3196 | } | |
3197 | ||
3198 | ||
3199 | static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm, | |
3200 | const u8 *current_ap, const u8 *sta_addr, | |
3201 | u16 status, const u8 *resp_ies, | |
3202 | size_t resp_ies_len) | |
3203 | { | |
3204 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
3205 | size_t rlen; | |
3206 | struct ft_rrb_frame *frame; | |
3207 | u8 *pos; | |
6fc6879b JM |
3208 | |
3209 | wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR | |
3210 | " CurrentAP=" MACSTR " status=%d", | |
3211 | MAC2STR(sm->addr), MAC2STR(current_ap), status); | |
3212 | wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len); | |
3213 | ||
3214 | /* RRB - Forward action frame response to the Current AP */ | |
3215 | ||
3216 | /* | |
3217 | * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6] | |
3218 | * Status_Code[2] FT Request action frame body[variable] | |
3219 | */ | |
3220 | rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len; | |
3221 | ||
3222 | frame = os_malloc(sizeof(*frame) + rlen); | |
692ec305 | 3223 | if (frame == NULL) |
2c48211c | 3224 | return -1; |
6fc6879b JM |
3225 | frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; |
3226 | frame->packet_type = FT_PACKET_RESPONSE; | |
3227 | frame->action_length = host_to_le16(rlen); | |
3228 | os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN); | |
3229 | pos = (u8 *) (frame + 1); | |
3230 | *pos++ = WLAN_ACTION_FT; | |
3231 | *pos++ = 2; /* Action: Response */ | |
3232 | os_memcpy(pos, sta_addr, ETH_ALEN); | |
3233 | pos += ETH_ALEN; | |
3234 | os_memcpy(pos, wpa_auth->addr, ETH_ALEN); | |
3235 | pos += ETH_ALEN; | |
3236 | WPA_PUT_LE16(pos, status); | |
3237 | pos += 2; | |
692ec305 | 3238 | if (resp_ies) |
6fc6879b | 3239 | os_memcpy(pos, resp_ies, resp_ies_len); |
6fc6879b JM |
3240 | |
3241 | wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame, | |
3242 | sizeof(*frame) + rlen); | |
3243 | os_free(frame); | |
3244 | ||
3245 | return 0; | |
3246 | } | |
3247 | ||
3248 | ||
245fc96e MB |
3249 | static int wpa_ft_rrb_build_r0(const u8 *key, const size_t key_len, |
3250 | const struct tlv_list *tlvs, | |
3251 | const struct wpa_ft_pmk_r0_sa *pmk_r0, | |
3252 | const u8 *r1kh_id, const u8 *s1kh_id, | |
3253 | const struct tlv_list *tlv_auth, | |
3254 | const u8 *src_addr, u8 type, | |
3255 | u8 **packet, size_t *packet_len) | |
3256 | { | |
a3e18dbb JM |
3257 | u8 pmk_r1[PMK_LEN_MAX]; |
3258 | size_t pmk_r1_len = pmk_r0->pmk_r0_len; | |
245fc96e MB |
3259 | u8 pmk_r1_name[WPA_PMK_NAME_LEN]; |
3260 | u8 f_pairwise[sizeof(le16)]; | |
3a3e2832 | 3261 | u8 f_expires_in[sizeof(le16)]; |
a6509e85 | 3262 | u8 f_session_timeout[sizeof(le32)]; |
3a3e2832 | 3263 | int expires_in; |
a6509e85 | 3264 | int session_timeout; |
3a3e2832 | 3265 | struct os_reltime now; |
245fc96e MB |
3266 | int ret; |
3267 | struct tlv_list sess_tlv[] = { | |
a3e18dbb | 3268 | { .type = FT_RRB_PMK_R1, .len = pmk_r1_len, |
245fc96e MB |
3269 | .data = pmk_r1 }, |
3270 | { .type = FT_RRB_PMK_R1_NAME, .len = sizeof(pmk_r1_name), | |
3271 | .data = pmk_r1_name }, | |
3272 | { .type = FT_RRB_PAIRWISE, .len = sizeof(f_pairwise), | |
3273 | .data = f_pairwise }, | |
3a3e2832 MB |
3274 | { .type = FT_RRB_EXPIRES_IN, .len = sizeof(f_expires_in), |
3275 | .data = f_expires_in }, | |
069b4e30 MB |
3276 | { .type = FT_RRB_IDENTITY, .len = pmk_r0->identity_len, |
3277 | .data = pmk_r0->identity }, | |
3278 | { .type = FT_RRB_RADIUS_CUI, .len = pmk_r0->radius_cui_len, | |
3279 | .data = pmk_r0->radius_cui }, | |
a6509e85 MB |
3280 | { .type = FT_RRB_SESSION_TIMEOUT, |
3281 | .len = sizeof(f_session_timeout), | |
3282 | .data = f_session_timeout }, | |
245fc96e MB |
3283 | { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL }, |
3284 | }; | |
3285 | ||
a3e18dbb JM |
3286 | if (wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_len, |
3287 | pmk_r0->pmk_r0_name, r1kh_id, | |
245fc96e MB |
3288 | s1kh_id, pmk_r1, pmk_r1_name) < 0) |
3289 | return -1; | |
a3e18dbb JM |
3290 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 (for peer AP)", |
3291 | pmk_r1, pmk_r1_len); | |
3292 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name (for peer AP)", | |
3293 | pmk_r1_name, WPA_PMK_NAME_LEN); | |
245fc96e MB |
3294 | WPA_PUT_LE16(f_pairwise, pmk_r0->pairwise); |
3295 | ||
3a3e2832 MB |
3296 | os_get_reltime(&now); |
3297 | if (pmk_r0->expiration > now.sec) | |
3298 | expires_in = pmk_r0->expiration - now.sec; | |
3299 | else if (pmk_r0->expiration) | |
3300 | expires_in = 1; | |
3301 | else | |
3302 | expires_in = 0; | |
3303 | WPA_PUT_LE16(f_expires_in, expires_in); | |
3304 | ||
a6509e85 MB |
3305 | if (pmk_r0->session_timeout > now.sec) |
3306 | session_timeout = pmk_r0->session_timeout - now.sec; | |
3307 | else if (pmk_r0->session_timeout) | |
3308 | session_timeout = 1; | |
3309 | else | |
3310 | session_timeout = 0; | |
3311 | WPA_PUT_LE32(f_session_timeout, session_timeout); | |
3312 | ||
245fc96e | 3313 | ret = wpa_ft_rrb_build(key, key_len, tlvs, sess_tlv, tlv_auth, |
17010c38 MB |
3314 | pmk_r0->vlan, src_addr, type, |
3315 | packet, packet_len); | |
245fc96e MB |
3316 | |
3317 | os_memset(pmk_r1, 0, sizeof(pmk_r1)); | |
3318 | ||
3319 | return ret; | |
3320 | } | |
3321 | ||
3322 | ||
6fc6879b JM |
3323 | static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth, |
3324 | const u8 *src_addr, | |
245fc96e | 3325 | const u8 *enc, size_t enc_len, |
eefe8630 MB |
3326 | const u8 *auth, size_t auth_len, |
3327 | int no_defer) | |
6fc6879b | 3328 | { |
245fc96e MB |
3329 | const char *msgtype = "pull request"; |
3330 | u8 *plain = NULL, *packet = NULL; | |
3331 | size_t plain_len = 0, packet_len = 0; | |
3a46cf93 | 3332 | struct ft_remote_r1kh *r1kh, *r1kh_wildcard; |
245fc96e MB |
3333 | const u8 *key; |
3334 | size_t key_len; | |
eefe8630 | 3335 | int seq_ret; |
245fc96e MB |
3336 | const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id, *f_s1kh_id, *f_pmk_r0_name; |
3337 | size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len, f_s1kh_id_len; | |
3338 | size_t f_pmk_r0_name_len; | |
3339 | const struct wpa_ft_pmk_r0_sa *r0; | |
3340 | int ret; | |
3341 | struct tlv_list resp[2]; | |
eefe8630 MB |
3342 | struct tlv_list resp_auth[5]; |
3343 | struct ft_rrb_seq f_seq; | |
6fc6879b JM |
3344 | |
3345 | wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull"); | |
3346 | ||
245fc96e MB |
3347 | RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1); |
3348 | wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len); | |
3349 | ||
3350 | if (wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len)) { | |
3351 | wpa_printf(MSG_DEBUG, "FT: R0KH-ID mismatch"); | |
3352 | goto out; | |
3353 | } | |
3354 | ||
3355 | RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN); | |
3356 | wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id)); | |
3357 | ||
3a46cf93 MB |
3358 | wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh, &r1kh_wildcard); |
3359 | if (r1kh) { | |
3360 | key = r1kh->key; | |
3361 | key_len = sizeof(r1kh->key); | |
3362 | } else if (r1kh_wildcard) { | |
3363 | wpa_printf(MSG_DEBUG, "FT: Using wildcard R1KH-ID"); | |
3364 | key = r1kh_wildcard->key; | |
3365 | key_len = sizeof(r1kh_wildcard->key); | |
3366 | } else { | |
245fc96e | 3367 | goto out; |
3a46cf93 | 3368 | } |
245fc96e MB |
3369 | |
3370 | RRB_GET_AUTH(FT_RRB_NONCE, nonce, "pull request", FT_RRB_NONCE_LEN); | |
3371 | wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len); | |
3372 | ||
3a46cf93 MB |
3373 | seq_ret = FT_RRB_SEQ_DROP; |
3374 | if (r1kh) | |
3375 | seq_ret = wpa_ft_rrb_seq_chk(r1kh->seq, src_addr, enc, enc_len, | |
3376 | auth, auth_len, msgtype, no_defer); | |
3377 | if (!no_defer && r1kh_wildcard && | |
3378 | (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) { | |
3379 | /* wildcard: r1kh-id unknown or changed addr -> do a seq req */ | |
3380 | seq_ret = FT_RRB_SEQ_DEFER; | |
3381 | } | |
3382 | ||
eefe8630 MB |
3383 | if (seq_ret == FT_RRB_SEQ_DROP) |
3384 | goto out; | |
3385 | ||
245fc96e MB |
3386 | if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len, |
3387 | src_addr, FT_PACKET_R0KH_R1KH_PULL, | |
3388 | &plain, &plain_len) < 0) | |
3389 | goto out; | |
3390 | ||
3a46cf93 MB |
3391 | if (!r1kh) |
3392 | r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard, src_addr, | |
3393 | f_r1kh_id, | |
3394 | wpa_auth->conf.rkh_pos_timeout); | |
3395 | if (!r1kh) | |
3396 | goto out; | |
3397 | ||
eefe8630 MB |
3398 | if (seq_ret == FT_RRB_SEQ_DEFER) { |
3399 | wpa_ft_rrb_seq_req(wpa_auth, r1kh->seq, src_addr, f_r0kh_id, | |
3400 | f_r0kh_id_len, f_r1kh_id, key, key_len, | |
3401 | enc, enc_len, auth, auth_len, | |
3402 | &wpa_ft_rrb_rx_pull); | |
3403 | goto out; | |
3404 | } | |
3405 | ||
3406 | wpa_ft_rrb_seq_accept(wpa_auth, r1kh->seq, src_addr, auth, auth_len, | |
3407 | msgtype); | |
3a46cf93 MB |
3408 | wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, |
3409 | wpa_auth->conf.rkh_pos_timeout); | |
eefe8630 | 3410 | |
245fc96e MB |
3411 | RRB_GET(FT_RRB_PMK_R0_NAME, pmk_r0_name, msgtype, WPA_PMK_NAME_LEN); |
3412 | wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", f_pmk_r0_name, | |
3413 | f_pmk_r0_name_len); | |
3414 | ||
3415 | RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN); | |
3416 | wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id)); | |
3417 | ||
eefe8630 MB |
3418 | if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) { |
3419 | wpa_printf(MSG_DEBUG, "FT: Failed to get seq num"); | |
3420 | goto out; | |
3421 | } | |
3422 | ||
245fc96e MB |
3423 | resp[0].type = FT_RRB_S1KH_ID; |
3424 | resp[0].len = f_s1kh_id_len; | |
3425 | resp[0].data = f_s1kh_id; | |
3426 | resp[1].type = FT_RRB_LAST_EMPTY; | |
3427 | resp[1].len = 0; | |
3428 | resp[1].data = NULL; | |
3429 | ||
3430 | resp_auth[0].type = FT_RRB_NONCE; | |
3431 | resp_auth[0].len = f_nonce_len; | |
3432 | resp_auth[0].data = f_nonce; | |
eefe8630 MB |
3433 | resp_auth[1].type = FT_RRB_SEQ; |
3434 | resp_auth[1].len = sizeof(f_seq); | |
3435 | resp_auth[1].data = (u8 *) &f_seq; | |
3436 | resp_auth[2].type = FT_RRB_R0KH_ID; | |
3437 | resp_auth[2].len = f_r0kh_id_len; | |
3438 | resp_auth[2].data = f_r0kh_id; | |
3439 | resp_auth[3].type = FT_RRB_R1KH_ID; | |
3440 | resp_auth[3].len = f_r1kh_id_len; | |
3441 | resp_auth[3].data = f_r1kh_id; | |
3442 | resp_auth[4].type = FT_RRB_LAST_EMPTY; | |
3443 | resp_auth[4].len = 0; | |
3444 | resp_auth[4].data = NULL; | |
245fc96e | 3445 | |
9fbe292f | 3446 | if (wpa_ft_fetch_pmk_r0(wpa_auth, f_s1kh_id, f_pmk_r0_name, &r0) < 0) { |
245fc96e | 3447 | wpa_printf(MSG_DEBUG, "FT: No matching PMK-R0-Name found"); |
9fbe292f MB |
3448 | ret = wpa_ft_rrb_build(key, key_len, resp, NULL, resp_auth, |
3449 | NULL, wpa_auth->addr, | |
3450 | FT_PACKET_R0KH_R1KH_RESP, | |
3451 | &packet, &packet_len); | |
3452 | } else { | |
3453 | ret = wpa_ft_rrb_build_r0(key, key_len, resp, r0, f_r1kh_id, | |
3454 | f_s1kh_id, resp_auth, wpa_auth->addr, | |
3455 | FT_PACKET_R0KH_R1KH_RESP, | |
3456 | &packet, &packet_len); | |
3457 | } | |
245fc96e MB |
3458 | |
3459 | if (!ret) | |
3460 | wpa_ft_rrb_oui_send(wpa_auth, src_addr, | |
3461 | FT_PACKET_R0KH_R1KH_RESP, packet, | |
3462 | packet_len); | |
3463 | ||
3464 | out: | |
3465 | os_free(plain); | |
3466 | os_free(packet); | |
6fc6879b | 3467 | |
245fc96e MB |
3468 | return 0; |
3469 | } | |
6fc6879b | 3470 | |
6fc6879b | 3471 | |
245fc96e MB |
3472 | /* @returns 0 on success |
3473 | * -1 on error | |
3a46cf93 | 3474 | * -2 if FR_RRB_PAIRWISE is missing |
245fc96e MB |
3475 | */ |
3476 | static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth, | |
3477 | const u8 *src_addr, u8 type, | |
3478 | const u8 *enc, size_t enc_len, | |
3479 | const u8 *auth, size_t auth_len, | |
eefe8630 MB |
3480 | const char *msgtype, u8 *s1kh_id_out, |
3481 | int (*cb)(struct wpa_authenticator *wpa_auth, | |
3482 | const u8 *src_addr, | |
3483 | const u8 *enc, size_t enc_len, | |
3484 | const u8 *auth, size_t auth_len, | |
3485 | int no_defer)) | |
245fc96e MB |
3486 | { |
3487 | u8 *plain = NULL; | |
3488 | size_t plain_len = 0; | |
3a46cf93 | 3489 | struct ft_remote_r0kh *r0kh, *r0kh_wildcard; |
245fc96e MB |
3490 | const u8 *key; |
3491 | size_t key_len; | |
eefe8630 | 3492 | int seq_ret; |
245fc96e MB |
3493 | const u8 *f_r1kh_id, *f_s1kh_id, *f_r0kh_id; |
3494 | const u8 *f_pmk_r1_name, *f_pairwise, *f_pmk_r1; | |
3a3e2832 | 3495 | const u8 *f_expires_in; |
245fc96e | 3496 | size_t f_r1kh_id_len, f_s1kh_id_len, f_r0kh_id_len; |
069b4e30 | 3497 | const u8 *f_identity, *f_radius_cui; |
a6509e85 | 3498 | const u8 *f_session_timeout; |
245fc96e | 3499 | size_t f_pmk_r1_name_len, f_pairwise_len, f_pmk_r1_len; |
3a3e2832 | 3500 | size_t f_expires_in_len; |
069b4e30 | 3501 | size_t f_identity_len, f_radius_cui_len; |
a6509e85 | 3502 | size_t f_session_timeout_len; |
245fc96e MB |
3503 | int pairwise; |
3504 | int ret = -1; | |
3a3e2832 | 3505 | int expires_in; |
a6509e85 | 3506 | int session_timeout; |
17010c38 | 3507 | struct vlan_description vlan; |
6fc6879b | 3508 | |
245fc96e MB |
3509 | RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, msgtype, -1); |
3510 | wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", f_r0kh_id, f_r0kh_id_len); | |
6fc6879b | 3511 | |
245fc96e MB |
3512 | RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, msgtype, FT_R1KH_ID_LEN); |
3513 | wpa_printf(MSG_DEBUG, "FT: R1KH-ID=" MACSTR, MAC2STR(f_r1kh_id)); | |
3514 | ||
3515 | if (wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id)) { | |
3516 | wpa_printf(MSG_DEBUG, "FT: R1KH-ID mismatch"); | |
3517 | goto out; | |
6fc6879b JM |
3518 | } |
3519 | ||
3a46cf93 MB |
3520 | wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, &r0kh, |
3521 | &r0kh_wildcard); | |
3522 | if (r0kh) { | |
3523 | key = r0kh->key; | |
3524 | key_len = sizeof(r0kh->key); | |
3525 | } else if (r0kh_wildcard) { | |
3526 | wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID"); | |
3527 | key = r0kh_wildcard->key; | |
3528 | key_len = sizeof(r0kh_wildcard->key); | |
3529 | } else { | |
245fc96e | 3530 | goto out; |
3a46cf93 MB |
3531 | } |
3532 | ||
3533 | seq_ret = FT_RRB_SEQ_DROP; | |
3534 | if (r0kh) { | |
3535 | seq_ret = wpa_ft_rrb_seq_chk(r0kh->seq, src_addr, enc, enc_len, | |
3536 | auth, auth_len, msgtype, | |
3537 | cb ? 0 : 1); | |
3538 | } | |
3539 | if (cb && r0kh_wildcard && | |
3540 | (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) { | |
3541 | /* wildcard: r0kh-id unknown or changed addr -> do a seq req */ | |
3542 | seq_ret = FT_RRB_SEQ_DEFER; | |
3543 | } | |
6fc6879b | 3544 | |
eefe8630 MB |
3545 | if (seq_ret == FT_RRB_SEQ_DROP) |
3546 | goto out; | |
3547 | ||
245fc96e MB |
3548 | if (wpa_ft_rrb_decrypt(key, key_len, enc, enc_len, auth, auth_len, |
3549 | src_addr, type, &plain, &plain_len) < 0) | |
3550 | goto out; | |
3551 | ||
3a46cf93 MB |
3552 | if (!r0kh) |
3553 | r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, src_addr, | |
3554 | f_r0kh_id, f_r0kh_id_len, | |
3555 | wpa_auth->conf.rkh_pos_timeout); | |
3556 | if (!r0kh) | |
3557 | goto out; | |
3558 | ||
eefe8630 MB |
3559 | if (seq_ret == FT_RRB_SEQ_DEFER) { |
3560 | wpa_ft_rrb_seq_req(wpa_auth, r0kh->seq, src_addr, f_r0kh_id, | |
3561 | f_r0kh_id_len, f_r1kh_id, key, key_len, | |
3562 | enc, enc_len, auth, auth_len, cb); | |
3563 | goto out; | |
3564 | } | |
3565 | ||
3566 | wpa_ft_rrb_seq_accept(wpa_auth, r0kh->seq, src_addr, auth, auth_len, | |
3567 | msgtype); | |
3a46cf93 MB |
3568 | wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, |
3569 | wpa_auth->conf.rkh_pos_timeout); | |
eefe8630 | 3570 | |
245fc96e MB |
3571 | RRB_GET(FT_RRB_S1KH_ID, s1kh_id, msgtype, ETH_ALEN); |
3572 | wpa_printf(MSG_DEBUG, "FT: S1KH-ID=" MACSTR, MAC2STR(f_s1kh_id)); | |
3573 | ||
3574 | if (s1kh_id_out) | |
3575 | os_memcpy(s1kh_id_out, f_s1kh_id, ETH_ALEN); | |
3576 | ||
3a46cf93 | 3577 | ret = -2; |
245fc96e MB |
3578 | RRB_GET(FT_RRB_PAIRWISE, pairwise, msgtype, sizeof(le16)); |
3579 | wpa_hexdump(MSG_DEBUG, "FT: pairwise", f_pairwise, f_pairwise_len); | |
3580 | ||
3a46cf93 | 3581 | ret = -1; |
245fc96e MB |
3582 | RRB_GET(FT_RRB_PMK_R1_NAME, pmk_r1_name, msgtype, WPA_PMK_NAME_LEN); |
3583 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", | |
3584 | f_pmk_r1_name, WPA_PMK_NAME_LEN); | |
3585 | ||
3586 | RRB_GET(FT_RRB_PMK_R1, pmk_r1, msgtype, PMK_LEN); | |
3587 | wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f_pmk_r1, PMK_LEN); | |
3588 | ||
3589 | pairwise = WPA_GET_LE16(f_pairwise); | |
3590 | ||
3a3e2832 MB |
3591 | RRB_GET_OPTIONAL(FT_RRB_EXPIRES_IN, expires_in, msgtype, |
3592 | sizeof(le16)); | |
3593 | if (f_expires_in) | |
3594 | expires_in = WPA_GET_LE16(f_expires_in); | |
3595 | else | |
3596 | expires_in = 0; | |
3597 | ||
3598 | wpa_printf(MSG_DEBUG, "FT: PMK-R1 %s - expires_in=%d", msgtype, | |
3599 | expires_in); | |
3600 | ||
17010c38 MB |
3601 | if (wpa_ft_rrb_get_tlv_vlan(plain, plain_len, &vlan) < 0) { |
3602 | wpa_printf(MSG_DEBUG, "FT: Cannot parse vlan"); | |
3603 | wpa_ft_rrb_dump(plain, plain_len); | |
3604 | goto out; | |
3605 | } | |
3606 | ||
3607 | wpa_printf(MSG_DEBUG, "FT: vlan %d%s", | |
3608 | le_to_host16(vlan.untagged), vlan.tagged[0] ? "+" : ""); | |
3609 | ||
069b4e30 MB |
3610 | RRB_GET_OPTIONAL(FT_RRB_IDENTITY, identity, msgtype, -1); |
3611 | if (f_identity) | |
3612 | wpa_hexdump_ascii(MSG_DEBUG, "FT: Identity", f_identity, | |
3613 | f_identity_len); | |
3614 | ||
3615 | RRB_GET_OPTIONAL(FT_RRB_RADIUS_CUI, radius_cui, msgtype, -1); | |
3616 | if (f_radius_cui) | |
3617 | wpa_hexdump_ascii(MSG_DEBUG, "FT: CUI", f_radius_cui, | |
3618 | f_radius_cui_len); | |
3619 | ||
a6509e85 MB |
3620 | RRB_GET_OPTIONAL(FT_RRB_SESSION_TIMEOUT, session_timeout, msgtype, |
3621 | sizeof(le32)); | |
3622 | if (f_session_timeout) | |
3623 | session_timeout = WPA_GET_LE32(f_session_timeout); | |
3624 | else | |
3625 | session_timeout = 0; | |
3626 | wpa_printf(MSG_DEBUG, "FT: session_timeout %d", session_timeout); | |
3627 | ||
a3e18dbb JM |
3628 | if (wpa_ft_store_pmk_r1(wpa_auth, f_s1kh_id, f_pmk_r1, PMK_LEN, |
3629 | f_pmk_r1_name, | |
a6509e85 MB |
3630 | pairwise, &vlan, expires_in, session_timeout, |
3631 | f_identity, f_identity_len, f_radius_cui, | |
069b4e30 | 3632 | f_radius_cui_len) < 0) |
245fc96e MB |
3633 | goto out; |
3634 | ||
3635 | ret = 0; | |
3636 | out: | |
3637 | if (plain) { | |
3638 | os_memset(plain, 0, plain_len); | |
3639 | os_free(plain); | |
3640 | } | |
3641 | ||
3642 | return ret; | |
6fc6879b | 3643 | |
6fc6879b JM |
3644 | } |
3645 | ||
3646 | ||
245fc96e | 3647 | static void ft_finish_pull(struct wpa_state_machine *sm) |
692ec305 | 3648 | { |
692ec305 JM |
3649 | int res; |
3650 | u8 *resp_ies; | |
3651 | size_t resp_ies_len; | |
3652 | u16 status; | |
3653 | ||
3a46cf93 MB |
3654 | if (!sm->ft_pending_cb || !sm->ft_pending_req_ies) |
3655 | return; | |
3656 | ||
692ec305 JM |
3657 | res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies), |
3658 | wpabuf_len(sm->ft_pending_req_ies), | |
3659 | &resp_ies, &resp_ies_len); | |
3a46cf93 MB |
3660 | if (res < 0) { |
3661 | /* this loop is broken by ft_pending_pull_left_retries */ | |
3662 | wpa_printf(MSG_DEBUG, | |
3663 | "FT: Callback postponed until response is available"); | |
3664 | return; | |
3665 | } | |
692ec305 JM |
3666 | wpabuf_free(sm->ft_pending_req_ies); |
3667 | sm->ft_pending_req_ies = NULL; | |
692ec305 JM |
3668 | status = res; |
3669 | wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR | |
3670 | " - status %u", MAC2STR(sm->addr), status); | |
3671 | ||
3672 | sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr, | |
3673 | sm->ft_pending_auth_transaction + 1, status, | |
3674 | resp_ies, resp_ies_len); | |
3675 | os_free(resp_ies); | |
3676 | } | |
3677 | ||
3678 | ||
245fc96e MB |
3679 | struct ft_get_sta_ctx { |
3680 | const u8 *nonce; | |
3681 | const u8 *s1kh_id; | |
3682 | struct wpa_state_machine *sm; | |
3683 | }; | |
3684 | ||
3685 | ||
3686 | static int ft_get_sta_cb(struct wpa_state_machine *sm, void *ctx) | |
692ec305 | 3687 | { |
245fc96e | 3688 | struct ft_get_sta_ctx *info = ctx; |
692ec305 | 3689 | |
245fc96e MB |
3690 | if ((info->s1kh_id && |
3691 | os_memcmp(info->s1kh_id, sm->addr, ETH_ALEN) != 0) || | |
3692 | os_memcmp(info->nonce, sm->ft_pending_pull_nonce, | |
3693 | FT_RRB_NONCE_LEN) != 0 || | |
a8e25dee | 3694 | sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL) |
692ec305 JM |
3695 | return 0; |
3696 | ||
245fc96e MB |
3697 | info->sm = sm; |
3698 | ||
692ec305 JM |
3699 | return 1; |
3700 | } | |
3701 | ||
3702 | ||
6fc6879b JM |
3703 | static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth, |
3704 | const u8 *src_addr, | |
245fc96e | 3705 | const u8 *enc, size_t enc_len, |
eefe8630 MB |
3706 | const u8 *auth, size_t auth_len, |
3707 | int no_defer) | |
6fc6879b | 3708 | { |
245fc96e | 3709 | const char *msgtype = "pull response"; |
3a46cf93 | 3710 | int nak, ret = -1; |
245fc96e MB |
3711 | struct ft_get_sta_ctx ctx; |
3712 | u8 s1kh_id[ETH_ALEN]; | |
3713 | const u8 *f_nonce; | |
3714 | size_t f_nonce_len; | |
6fc6879b JM |
3715 | |
3716 | wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response"); | |
3717 | ||
245fc96e MB |
3718 | RRB_GET_AUTH(FT_RRB_NONCE, nonce, msgtype, FT_RRB_NONCE_LEN); |
3719 | wpa_hexdump(MSG_DEBUG, "FT: nonce", f_nonce, f_nonce_len); | |
6fc6879b | 3720 | |
245fc96e MB |
3721 | os_memset(&ctx, 0, sizeof(ctx)); |
3722 | ctx.nonce = f_nonce; | |
3723 | if (!wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) { | |
3724 | /* nonce not found */ | |
3725 | wpa_printf(MSG_DEBUG, "FT: Invalid nonce"); | |
6fc6879b JM |
3726 | return -1; |
3727 | } | |
3728 | ||
245fc96e | 3729 | ret = wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_RESP, |
eefe8630 MB |
3730 | enc, enc_len, auth, auth_len, msgtype, s1kh_id, |
3731 | no_defer ? NULL : &wpa_ft_rrb_rx_resp); | |
3a46cf93 MB |
3732 | if (ret == -2) { |
3733 | ret = 0; | |
3734 | nak = 1; | |
3735 | } else { | |
3736 | nak = 0; | |
3737 | } | |
245fc96e | 3738 | if (ret < 0) |
6fc6879b | 3739 | return -1; |
6fc6879b | 3740 | |
245fc96e MB |
3741 | ctx.s1kh_id = s1kh_id; |
3742 | if (wpa_auth_for_each_sta(wpa_auth, ft_get_sta_cb, &ctx)) { | |
3743 | wpa_printf(MSG_DEBUG, | |
3744 | "FT: Response to a pending pull request for " MACSTR, | |
3745 | MAC2STR(ctx.sm->addr)); | |
3a46cf93 MB |
3746 | eloop_cancel_timeout(wpa_ft_expire_pull, ctx.sm, NULL); |
3747 | if (nak) | |
3748 | ctx.sm->ft_pending_pull_left_retries = 0; | |
245fc96e | 3749 | ft_finish_pull(ctx.sm); |
6fc6879b JM |
3750 | } |
3751 | ||
245fc96e MB |
3752 | out: |
3753 | return ret; | |
6fc6879b JM |
3754 | } |
3755 | ||
3756 | ||
3757 | static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth, | |
3758 | const u8 *src_addr, | |
245fc96e | 3759 | const u8 *enc, size_t enc_len, |
eefe8630 | 3760 | const u8 *auth, size_t auth_len, int no_defer) |
6fc6879b | 3761 | { |
245fc96e | 3762 | const char *msgtype = "push"; |
6fc6879b JM |
3763 | |
3764 | wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push"); | |
3765 | ||
eefe8630 MB |
3766 | if (wpa_ft_rrb_rx_r1(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_PUSH, |
3767 | enc, enc_len, auth, auth_len, msgtype, NULL, | |
3768 | no_defer ? NULL : wpa_ft_rrb_rx_push) < 0) | |
6fc6879b | 3769 | return -1; |
eefe8630 MB |
3770 | |
3771 | return 0; | |
3772 | } | |
3773 | ||
3774 | ||
3775 | static int wpa_ft_rrb_rx_seq(struct wpa_authenticator *wpa_auth, | |
3776 | const u8 *src_addr, int type, | |
3777 | const u8 *enc, size_t enc_len, | |
3778 | const u8 *auth, size_t auth_len, | |
3779 | struct ft_remote_seq **rkh_seq, | |
3a46cf93 MB |
3780 | u8 **key, size_t *key_len, |
3781 | struct ft_remote_r0kh **r0kh_out, | |
3782 | struct ft_remote_r1kh **r1kh_out, | |
3783 | struct ft_remote_r0kh **r0kh_wildcard_out, | |
3784 | struct ft_remote_r1kh **r1kh_wildcard_out) | |
eefe8630 MB |
3785 | { |
3786 | struct ft_remote_r0kh *r0kh = NULL; | |
3787 | struct ft_remote_r1kh *r1kh = NULL; | |
3788 | const u8 *f_r0kh_id, *f_r1kh_id; | |
3789 | size_t f_r0kh_id_len, f_r1kh_id_len; | |
3790 | int to_r0kh, to_r1kh; | |
3791 | u8 *plain = NULL; | |
3792 | size_t plain_len = 0; | |
3a46cf93 MB |
3793 | struct ft_remote_r0kh *r0kh_wildcard; |
3794 | struct ft_remote_r1kh *r1kh_wildcard; | |
eefe8630 MB |
3795 | |
3796 | RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1); | |
3797 | RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN); | |
3798 | ||
3799 | to_r0kh = !wpa_ft_rrb_check_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len); | |
3800 | to_r1kh = !wpa_ft_rrb_check_r1kh(wpa_auth, f_r1kh_id); | |
3801 | ||
3802 | if (to_r0kh && to_r1kh) { | |
3803 | wpa_printf(MSG_DEBUG, "FT: seq - local R0KH-ID and R1KH-ID"); | |
3804 | goto out; | |
6fc6879b JM |
3805 | } |
3806 | ||
eefe8630 MB |
3807 | if (!to_r0kh && !to_r1kh) { |
3808 | wpa_printf(MSG_DEBUG, "FT: seq - remote R0KH-ID and R1KH-ID"); | |
3809 | goto out; | |
3810 | } | |
3811 | ||
3812 | if (!to_r0kh) { | |
3813 | wpa_ft_rrb_lookup_r0kh(wpa_auth, f_r0kh_id, f_r0kh_id_len, | |
3a46cf93 MB |
3814 | &r0kh, &r0kh_wildcard); |
3815 | if (!r0kh_wildcard && | |
3816 | (!r0kh || os_memcmp(r0kh->addr, src_addr, ETH_ALEN) != 0)) { | |
eefe8630 MB |
3817 | wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID", |
3818 | f_r0kh_id, f_r0kh_id_len); | |
3819 | goto out; | |
3820 | } | |
3a46cf93 MB |
3821 | if (r0kh) { |
3822 | *key = r0kh->key; | |
3823 | *key_len = sizeof(r0kh->key); | |
3824 | } else { | |
3825 | *key = r0kh_wildcard->key; | |
3826 | *key_len = sizeof(r0kh_wildcard->key); | |
3827 | } | |
eefe8630 MB |
3828 | } |
3829 | ||
3830 | if (!to_r1kh) { | |
3a46cf93 MB |
3831 | wpa_ft_rrb_lookup_r1kh(wpa_auth, f_r1kh_id, &r1kh, |
3832 | &r1kh_wildcard); | |
3833 | if (!r1kh_wildcard && | |
3834 | (!r1kh || os_memcmp(r1kh->addr, src_addr, ETH_ALEN) != 0)) { | |
eefe8630 MB |
3835 | wpa_hexdump(MSG_DEBUG, "FT: Did not find R1KH-ID", |
3836 | f_r1kh_id, FT_R1KH_ID_LEN); | |
3837 | goto out; | |
3838 | } | |
3a46cf93 MB |
3839 | if (r1kh) { |
3840 | *key = r1kh->key; | |
3841 | *key_len = sizeof(r1kh->key); | |
3842 | } else { | |
3843 | *key = r1kh_wildcard->key; | |
3844 | *key_len = sizeof(r1kh_wildcard->key); | |
3845 | } | |
eefe8630 MB |
3846 | } |
3847 | ||
3848 | if (wpa_ft_rrb_decrypt(*key, *key_len, enc, enc_len, auth, auth_len, | |
3849 | src_addr, type, &plain, &plain_len) < 0) | |
3850 | goto out; | |
3851 | ||
3852 | os_free(plain); | |
3853 | ||
3a46cf93 MB |
3854 | if (!to_r0kh) { |
3855 | if (!r0kh) | |
3856 | r0kh = wpa_ft_rrb_add_r0kh(wpa_auth, r0kh_wildcard, | |
3857 | src_addr, f_r0kh_id, | |
3858 | f_r0kh_id_len, | |
3859 | ftRRBseqTimeout); | |
3860 | if (!r0kh) | |
3861 | goto out; | |
3862 | ||
3863 | wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, ftRRBseqTimeout); | |
3864 | *rkh_seq = r0kh->seq; | |
3865 | if (r0kh_out) | |
3866 | *r0kh_out = r0kh; | |
3867 | if (r0kh_wildcard_out) | |
3868 | *r0kh_wildcard_out = r0kh_wildcard; | |
3869 | } | |
3870 | ||
3871 | if (!to_r1kh) { | |
3872 | if (!r1kh) | |
3873 | r1kh = wpa_ft_rrb_add_r1kh(wpa_auth, r1kh_wildcard, | |
3874 | src_addr, f_r1kh_id, | |
3875 | ftRRBseqTimeout); | |
3876 | if (!r1kh) | |
3877 | goto out; | |
3878 | ||
3879 | wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, ftRRBseqTimeout); | |
3880 | *rkh_seq = r1kh->seq; | |
3881 | if (r1kh_out) | |
3882 | *r1kh_out = r1kh; | |
3883 | if (r1kh_wildcard_out) | |
3884 | *r1kh_wildcard_out = r1kh_wildcard; | |
3885 | } | |
3886 | ||
eefe8630 MB |
3887 | return 0; |
3888 | out: | |
3889 | return -1; | |
3890 | } | |
3891 | ||
3892 | ||
3893 | static int wpa_ft_rrb_rx_seq_req(struct wpa_authenticator *wpa_auth, | |
3894 | const u8 *src_addr, | |
3895 | const u8 *enc, size_t enc_len, | |
3896 | const u8 *auth, size_t auth_len, | |
3897 | int no_defer) | |
3898 | { | |
3899 | int ret = -1; | |
3900 | struct ft_rrb_seq f_seq; | |
3901 | const u8 *f_nonce, *f_r0kh_id, *f_r1kh_id; | |
3902 | size_t f_nonce_len, f_r0kh_id_len, f_r1kh_id_len; | |
3a46cf93 | 3903 | struct ft_remote_seq *rkh_seq = NULL; |
eefe8630 MB |
3904 | u8 *packet = NULL, *key = NULL; |
3905 | size_t packet_len = 0, key_len = 0; | |
3906 | struct tlv_list seq_resp_auth[5]; | |
3907 | ||
3908 | wpa_printf(MSG_DEBUG, "FT: Received sequence number request"); | |
3909 | ||
3910 | if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_REQ, | |
3911 | enc, enc_len, auth, auth_len, &rkh_seq, &key, | |
3a46cf93 | 3912 | &key_len, NULL, NULL, NULL, NULL) < 0) |
eefe8630 MB |
3913 | goto out; |
3914 | ||
3915 | RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq request", FT_RRB_NONCE_LEN); | |
3916 | wpa_hexdump(MSG_DEBUG, "FT: seq request - nonce", f_nonce, f_nonce_len); | |
3917 | ||
3918 | RRB_GET_AUTH(FT_RRB_R0KH_ID, r0kh_id, "seq", -1); | |
3919 | RRB_GET_AUTH(FT_RRB_R1KH_ID, r1kh_id, "seq", FT_R1KH_ID_LEN); | |
3920 | ||
3921 | if (wpa_ft_new_seq(rkh_seq, &f_seq) < 0) { | |
3922 | wpa_printf(MSG_DEBUG, "FT: Failed to get seq num"); | |
3923 | goto out; | |
3924 | } | |
3925 | ||
3926 | seq_resp_auth[0].type = FT_RRB_NONCE; | |
3927 | seq_resp_auth[0].len = f_nonce_len; | |
3928 | seq_resp_auth[0].data = f_nonce; | |
3929 | seq_resp_auth[1].type = FT_RRB_SEQ; | |
3930 | seq_resp_auth[1].len = sizeof(f_seq); | |
3931 | seq_resp_auth[1].data = (u8 *) &f_seq; | |
3932 | seq_resp_auth[2].type = FT_RRB_R0KH_ID; | |
3933 | seq_resp_auth[2].len = f_r0kh_id_len; | |
3934 | seq_resp_auth[2].data = f_r0kh_id; | |
3935 | seq_resp_auth[3].type = FT_RRB_R1KH_ID; | |
3936 | seq_resp_auth[3].len = FT_R1KH_ID_LEN; | |
3937 | seq_resp_auth[3].data = f_r1kh_id; | |
3938 | seq_resp_auth[4].type = FT_RRB_LAST_EMPTY; | |
3939 | seq_resp_auth[4].len = 0; | |
3940 | seq_resp_auth[4].data = NULL; | |
3941 | ||
17010c38 | 3942 | if (wpa_ft_rrb_build(key, key_len, NULL, NULL, seq_resp_auth, NULL, |
eefe8630 MB |
3943 | wpa_auth->addr, FT_PACKET_R0KH_R1KH_SEQ_RESP, |
3944 | &packet, &packet_len) < 0) | |
3945 | goto out; | |
3946 | ||
3947 | wpa_ft_rrb_oui_send(wpa_auth, src_addr, | |
3948 | FT_PACKET_R0KH_R1KH_SEQ_RESP, packet, | |
3949 | packet_len); | |
3950 | ||
3951 | out: | |
3952 | os_free(packet); | |
3953 | ||
3954 | return ret; | |
3955 | } | |
3956 | ||
3957 | ||
3958 | static int wpa_ft_rrb_rx_seq_resp(struct wpa_authenticator *wpa_auth, | |
3959 | const u8 *src_addr, | |
3960 | const u8 *enc, size_t enc_len, | |
3961 | const u8 *auth, size_t auth_len, | |
3962 | int no_defer) | |
3963 | { | |
3964 | u8 *key = NULL; | |
3965 | size_t key_len = 0; | |
3a46cf93 MB |
3966 | struct ft_remote_r0kh *r0kh = NULL, *r0kh_wildcard = NULL; |
3967 | struct ft_remote_r1kh *r1kh = NULL, *r1kh_wildcard = NULL; | |
eefe8630 MB |
3968 | const u8 *f_nonce, *f_seq; |
3969 | size_t f_nonce_len, f_seq_len; | |
3970 | struct ft_remote_seq *rkh_seq = NULL; | |
3971 | struct ft_remote_item *item; | |
3972 | struct os_reltime now, now_remote; | |
3973 | int seq_ret, found; | |
3974 | const struct ft_rrb_seq *msg_both; | |
3975 | u32 msg_dom, msg_seq; | |
3976 | ||
3977 | wpa_printf(MSG_DEBUG, "FT: Received sequence number response"); | |
3978 | ||
3979 | if (wpa_ft_rrb_rx_seq(wpa_auth, src_addr, FT_PACKET_R0KH_R1KH_SEQ_RESP, | |
3980 | enc, enc_len, auth, auth_len, &rkh_seq, &key, | |
3a46cf93 MB |
3981 | &key_len, &r0kh, &r1kh, &r0kh_wildcard, |
3982 | &r1kh_wildcard) < 0) | |
eefe8630 MB |
3983 | goto out; |
3984 | ||
3985 | RRB_GET_AUTH(FT_RRB_NONCE, nonce, "seq response", FT_RRB_NONCE_LEN); | |
3986 | wpa_hexdump(MSG_DEBUG, "FT: seq response - nonce", f_nonce, | |
3987 | f_nonce_len); | |
3988 | ||
3989 | found = 0; | |
3990 | dl_list_for_each(item, &rkh_seq->rx.queue, struct ft_remote_item, | |
3991 | list) { | |
3992 | if (os_memcmp_const(f_nonce, item->nonce, | |
3993 | FT_RRB_NONCE_LEN) != 0 || | |
3994 | os_get_reltime(&now) < 0 || | |
3995 | os_reltime_expired(&now, &item->nonce_ts, ftRRBseqTimeout)) | |
3996 | continue; | |
3997 | ||
3998 | found = 1; | |
3999 | break; | |
4000 | } | |
4001 | if (!found) { | |
4002 | wpa_printf(MSG_DEBUG, "FT: seq response - bad nonce"); | |
4003 | goto out; | |
4004 | } | |
4005 | ||
3a46cf93 MB |
4006 | if (r0kh) { |
4007 | wpa_ft_rrb_r0kh_replenish(wpa_auth, r0kh, | |
4008 | wpa_auth->conf.rkh_pos_timeout); | |
4009 | if (r0kh_wildcard) | |
4010 | os_memcpy(r0kh->addr, src_addr, ETH_ALEN); | |
4011 | } | |
4012 | ||
4013 | if (r1kh) { | |
4014 | wpa_ft_rrb_r1kh_replenish(wpa_auth, r1kh, | |
4015 | wpa_auth->conf.rkh_pos_timeout); | |
4016 | if (r1kh_wildcard) | |
4017 | os_memcpy(r1kh->addr, src_addr, ETH_ALEN); | |
4018 | } | |
4019 | ||
eefe8630 MB |
4020 | seq_ret = wpa_ft_rrb_seq_chk(rkh_seq, src_addr, enc, enc_len, auth, |
4021 | auth_len, "seq response", 1); | |
4022 | if (seq_ret == FT_RRB_SEQ_OK) { | |
4023 | wpa_printf(MSG_DEBUG, "FT: seq response - valid seq number"); | |
4024 | wpa_ft_rrb_seq_accept(wpa_auth, rkh_seq, src_addr, auth, | |
4025 | auth_len, "seq response"); | |
4026 | } else { | |
4027 | wpa_printf(MSG_DEBUG, "FT: seq response - reset seq number"); | |
4028 | ||
4029 | RRB_GET_AUTH(FT_RRB_SEQ, seq, "seq response", | |
4030 | sizeof(*msg_both)); | |
4031 | msg_both = (const struct ft_rrb_seq *) f_seq; | |
4032 | ||
4033 | msg_dom = le_to_host32(msg_both->dom); | |
4034 | msg_seq = le_to_host32(msg_both->seq); | |
4035 | now_remote.sec = le_to_host32(msg_both->ts); | |
4036 | now_remote.usec = 0; | |
4037 | ||
4038 | rkh_seq->rx.num_last = 2; | |
4039 | rkh_seq->rx.dom = msg_dom; | |
4040 | rkh_seq->rx.offsetidx = 0; | |
4041 | /* Accept some older, possibly cached packets as well */ | |
4042 | rkh_seq->rx.last[0] = msg_seq - FT_REMOTE_SEQ_BACKLOG - | |
4043 | dl_list_len(&rkh_seq->rx.queue); | |
4044 | rkh_seq->rx.last[1] = msg_seq; | |
4045 | ||
4046 | /* local time - offset = remote time | |
4047 | * <=> local time - remote time = offset */ | |
4048 | os_reltime_sub(&now, &now_remote, &rkh_seq->rx.time_offset); | |
4049 | } | |
4050 | ||
4051 | wpa_ft_rrb_seq_flush(wpa_auth, rkh_seq, 1); | |
6fc6879b JM |
4052 | |
4053 | return 0; | |
245fc96e MB |
4054 | out: |
4055 | return -1; | |
6fc6879b JM |
4056 | } |
4057 | ||
4058 | ||
4059 | int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr, | |
4060 | const u8 *data, size_t data_len) | |
4061 | { | |
4062 | struct ft_rrb_frame *frame; | |
4063 | u16 alen; | |
4064 | const u8 *pos, *end, *start; | |
4065 | u8 action; | |
4066 | const u8 *sta_addr, *target_ap_addr; | |
4067 | ||
4068 | wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR, | |
4069 | MAC2STR(src_addr)); | |
4070 | ||
4071 | if (data_len < sizeof(*frame)) { | |
4072 | wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)", | |
4073 | (unsigned long) data_len); | |
4074 | return -1; | |
4075 | } | |
4076 | ||
4077 | pos = data; | |
4078 | frame = (struct ft_rrb_frame *) pos; | |
4079 | pos += sizeof(*frame); | |
4080 | ||
4081 | alen = le_to_host16(frame->action_length); | |
4082 | wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d " | |
4083 | "action_length=%d ap_address=" MACSTR, | |
4084 | frame->frame_type, frame->packet_type, alen, | |
4085 | MAC2STR(frame->ap_address)); | |
4086 | ||
4087 | if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) { | |
c1e033b0 | 4088 | /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */ |
6fc6879b JM |
4089 | wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with " |
4090 | "unrecognized type %d", frame->frame_type); | |
4091 | return -1; | |
4092 | } | |
4093 | ||
4094 | if (alen > data_len - sizeof(*frame)) { | |
4095 | wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action " | |
4096 | "frame"); | |
4097 | return -1; | |
4098 | } | |
4099 | ||
6fc6879b JM |
4100 | wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen); |
4101 | ||
4102 | if (alen < 1 + 1 + 2 * ETH_ALEN) { | |
4103 | wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough " | |
4104 | "room for Action Frame body); alen=%lu", | |
4105 | (unsigned long) alen); | |
4106 | return -1; | |
4107 | } | |
4108 | start = pos; | |
4109 | end = pos + alen; | |
4110 | ||
4111 | if (*pos != WLAN_ACTION_FT) { | |
4112 | wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category " | |
4113 | "%d", *pos); | |
4114 | return -1; | |
4115 | } | |
4116 | ||
4117 | pos++; | |
4118 | action = *pos++; | |
4119 | sta_addr = pos; | |
4120 | pos += ETH_ALEN; | |
4121 | target_ap_addr = pos; | |
4122 | pos += ETH_ALEN; | |
4123 | wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr=" | |
4124 | MACSTR " target_ap_addr=" MACSTR, | |
4125 | action, MAC2STR(sta_addr), MAC2STR(target_ap_addr)); | |
4126 | ||
4127 | if (frame->packet_type == FT_PACKET_REQUEST) { | |
4128 | wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request"); | |
4129 | ||
4130 | if (action != 1) { | |
4131 | wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in " | |
4132 | "RRB Request", action); | |
4133 | return -1; | |
4134 | } | |
4135 | ||
4136 | if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) { | |
4137 | wpa_printf(MSG_DEBUG, "FT: Target AP address in the " | |
4138 | "RRB Request does not match with own " | |
4139 | "address"); | |
4140 | return -1; | |
4141 | } | |
4142 | ||
4143 | if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address, | |
4144 | sta_addr, pos, end - pos) < 0) | |
4145 | return -1; | |
4146 | } else if (frame->packet_type == FT_PACKET_RESPONSE) { | |
4147 | u16 status_code; | |
4148 | ||
4149 | if (end - pos < 2) { | |
4150 | wpa_printf(MSG_DEBUG, "FT: Not enough room for status " | |
4151 | "code in RRB Response"); | |
4152 | return -1; | |
4153 | } | |
4154 | status_code = WPA_GET_LE16(pos); | |
4155 | pos += 2; | |
4156 | ||
4157 | wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response " | |
4158 | "(status_code=%d)", status_code); | |
4159 | ||
4160 | if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0) | |
4161 | return -1; | |
4162 | } else { | |
4163 | wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown " | |
4164 | "packet_type %d", frame->packet_type); | |
4165 | return -1; | |
4166 | } | |
4167 | ||
164a453f JM |
4168 | if (end > pos) { |
4169 | wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end", | |
4170 | pos, end - pos); | |
4171 | } | |
4172 | ||
6fc6879b JM |
4173 | return 0; |
4174 | } | |
4175 | ||
4176 | ||
50bd8e0a MB |
4177 | void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr, |
4178 | const u8 *dst_addr, u8 oui_suffix, const u8 *data, | |
4179 | size_t data_len) | |
4180 | { | |
245fc96e MB |
4181 | const u8 *auth, *enc; |
4182 | size_t alen, elen; | |
3a46cf93 | 4183 | int no_defer = 0; |
245fc96e | 4184 | |
50bd8e0a MB |
4185 | wpa_printf(MSG_DEBUG, "FT: RRB-OUI received frame from remote AP " |
4186 | MACSTR, MAC2STR(src_addr)); | |
4187 | wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame - oui_suffix=%d", oui_suffix); | |
4188 | ||
4189 | if (is_multicast_ether_addr(src_addr)) { | |
4190 | wpa_printf(MSG_DEBUG, | |
4191 | "FT: RRB-OUI received frame from multicast address " | |
4192 | MACSTR, MAC2STR(src_addr)); | |
4193 | return; | |
4194 | } | |
4195 | ||
4196 | if (is_multicast_ether_addr(dst_addr)) { | |
4197 | wpa_printf(MSG_DEBUG, | |
4198 | "FT: RRB-OUI received frame from remote AP " MACSTR | |
4199 | " to multicast address " MACSTR, | |
4200 | MAC2STR(src_addr), MAC2STR(dst_addr)); | |
3a46cf93 | 4201 | no_defer = 1; |
50bd8e0a MB |
4202 | } |
4203 | ||
245fc96e MB |
4204 | if (data_len < sizeof(u16)) { |
4205 | wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short"); | |
4206 | return; | |
4207 | } | |
4208 | ||
4209 | alen = WPA_GET_LE16(data); | |
4210 | if (data_len < sizeof(u16) + alen) { | |
4211 | wpa_printf(MSG_DEBUG, "FT: RRB-OUI frame too short"); | |
4212 | return; | |
4213 | } | |
4214 | ||
4215 | auth = data + sizeof(u16); | |
4216 | enc = data + sizeof(u16) + alen; | |
4217 | elen = data_len - sizeof(u16) - alen; | |
4218 | ||
50bd8e0a MB |
4219 | switch (oui_suffix) { |
4220 | case FT_PACKET_R0KH_R1KH_PULL: | |
eefe8630 | 4221 | wpa_ft_rrb_rx_pull(wpa_auth, src_addr, enc, elen, auth, alen, |
3a46cf93 | 4222 | no_defer); |
50bd8e0a MB |
4223 | break; |
4224 | case FT_PACKET_R0KH_R1KH_RESP: | |
eefe8630 | 4225 | wpa_ft_rrb_rx_resp(wpa_auth, src_addr, enc, elen, auth, alen, |
3a46cf93 | 4226 | no_defer); |
50bd8e0a MB |
4227 | break; |
4228 | case FT_PACKET_R0KH_R1KH_PUSH: | |
eefe8630 | 4229 | wpa_ft_rrb_rx_push(wpa_auth, src_addr, enc, elen, auth, alen, |
3a46cf93 | 4230 | no_defer); |
eefe8630 MB |
4231 | break; |
4232 | case FT_PACKET_R0KH_R1KH_SEQ_REQ: | |
4233 | wpa_ft_rrb_rx_seq_req(wpa_auth, src_addr, enc, elen, auth, alen, | |
3a46cf93 | 4234 | no_defer); |
eefe8630 MB |
4235 | break; |
4236 | case FT_PACKET_R0KH_R1KH_SEQ_RESP: | |
4237 | wpa_ft_rrb_rx_seq_resp(wpa_auth, src_addr, enc, elen, auth, | |
3a46cf93 | 4238 | alen, no_defer); |
50bd8e0a MB |
4239 | break; |
4240 | } | |
4241 | } | |
4242 | ||
4243 | ||
364c064a JM |
4244 | static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth, |
4245 | struct wpa_ft_pmk_r0_sa *pmk_r0, | |
4246 | struct ft_remote_r1kh *r1kh, | |
245fc96e | 4247 | const u8 *s1kh_id) |
6fc6879b | 4248 | { |
245fc96e MB |
4249 | u8 *packet; |
4250 | size_t packet_len; | |
eefe8630 | 4251 | struct ft_rrb_seq f_seq; |
245fc96e MB |
4252 | struct tlv_list push[] = { |
4253 | { .type = FT_RRB_S1KH_ID, .len = ETH_ALEN, | |
4254 | .data = s1kh_id }, | |
4255 | { .type = FT_RRB_PMK_R0_NAME, .len = WPA_PMK_NAME_LEN, | |
4256 | .data = pmk_r0->pmk_r0_name }, | |
4257 | { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL }, | |
4258 | }; | |
4259 | struct tlv_list push_auth[] = { | |
eefe8630 MB |
4260 | { .type = FT_RRB_SEQ, .len = sizeof(f_seq), |
4261 | .data = (u8 *) &f_seq }, | |
245fc96e MB |
4262 | { .type = FT_RRB_R0KH_ID, |
4263 | .len = wpa_auth->conf.r0_key_holder_len, | |
4264 | .data = wpa_auth->conf.r0_key_holder }, | |
4265 | { .type = FT_RRB_R1KH_ID, .len = FT_R1KH_ID_LEN, | |
4266 | .data = r1kh->id }, | |
4267 | { .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL }, | |
4268 | }; | |
4269 | ||
eefe8630 MB |
4270 | if (wpa_ft_new_seq(r1kh->seq, &f_seq) < 0) { |
4271 | wpa_printf(MSG_DEBUG, "FT: Failed to get seq num"); | |
4272 | return -1; | |
4273 | } | |
245fc96e MB |
4274 | |
4275 | if (wpa_ft_rrb_build_r0(r1kh->key, sizeof(r1kh->key), push, pmk_r0, | |
4276 | r1kh->id, s1kh_id, push_auth, wpa_auth->addr, | |
4277 | FT_PACKET_R0KH_R1KH_PUSH, | |
4278 | &packet, &packet_len) < 0) | |
364c064a | 4279 | return -1; |
6fc6879b | 4280 | |
50bd8e0a | 4281 | wpa_ft_rrb_oui_send(wpa_auth, r1kh->addr, FT_PACKET_R0KH_R1KH_PUSH, |
245fc96e MB |
4282 | packet, packet_len); |
4283 | ||
4284 | os_free(packet); | |
364c064a | 4285 | return 0; |
6fc6879b JM |
4286 | } |
4287 | ||
4288 | ||
4289 | void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr) | |
4290 | { | |
09211c98 MB |
4291 | struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; |
4292 | struct wpa_ft_pmk_r0_sa *r0, *r0found = NULL; | |
6fc6879b JM |
4293 | struct ft_remote_r1kh *r1kh; |
4294 | ||
4295 | if (!wpa_auth->conf.pmk_r1_push) | |
4296 | return; | |
3a46cf93 MB |
4297 | if (!wpa_auth->conf.r1kh_list) |
4298 | return; | |
6fc6879b | 4299 | |
09211c98 MB |
4300 | dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) { |
4301 | if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) { | |
4302 | r0found = r0; | |
6fc6879b | 4303 | break; |
09211c98 | 4304 | } |
6fc6879b JM |
4305 | } |
4306 | ||
09211c98 | 4307 | r0 = r0found; |
6fc6879b JM |
4308 | if (r0 == NULL || r0->pmk_r1_pushed) |
4309 | return; | |
4310 | r0->pmk_r1_pushed = 1; | |
4311 | ||
4312 | wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs " | |
4313 | "for STA " MACSTR, MAC2STR(addr)); | |
4314 | ||
3a46cf93 MB |
4315 | for (r1kh = *wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) { |
4316 | if (is_zero_ether_addr(r1kh->addr) || | |
4317 | is_zero_ether_addr(r1kh->id)) | |
4318 | continue; | |
eefe8630 MB |
4319 | if (wpa_ft_rrb_init_r1kh_seq(r1kh) < 0) |
4320 | continue; | |
245fc96e | 4321 | wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr); |
6fc6879b JM |
4322 | } |
4323 | } | |
4324 | ||
4ec1fd8e | 4325 | #endif /* CONFIG_IEEE80211R_AP */ |