1 /*
2 * WPA Supplicant - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2006-2018, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "crypto/aes_wrap.h"
13 #include "crypto/sha384.h"
14 #include "crypto/random.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/ieee802_11_common.h"
17 #include "common/ocv.h"
18 #include "common/wpa_ctrl.h"
19 #include "drivers/driver.h"
20 #include "wpa.h"
21 #include "wpa_i.h"
22 #include "wpa_ie.h"
23 #include "pmksa_cache.h"
24
25 #ifdef CONFIG_IEEE80211R
26
27 #ifdef CONFIG_PASN
28 static void wpa_ft_pasn_store_r1kh(struct wpa_sm *sm, const u8 *bssid);
29 #else /* CONFIG_PASN */
wpa_ft_pasn_store_r1kh(struct wpa_sm *sm, const u8 *bssid)30 static void wpa_ft_pasn_store_r1kh(struct wpa_sm *sm, const u8 *bssid)
31 {
32 }
33 #endif /* CONFIG_PASN */
34
35
wpa_derive_ptk_ft(struct wpa_sm *sm, const unsigned char *src_addr, const struct wpa_eapol_key *key, struct wpa_ptk *ptk)36 int wpa_derive_ptk_ft(struct wpa_sm *sm, const unsigned char *src_addr,
37 const struct wpa_eapol_key *key, struct wpa_ptk *ptk)
38 {
39 u8 ptk_name[WPA_PMK_NAME_LEN];
40 const u8 *anonce = key->key_nonce;
41 int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt);
42 const u8 *mpmk;
43 size_t mpmk_len, kdk_len;
44
45 if (sm->xxkey_len > 0) {
46 mpmk = sm->xxkey;
47 mpmk_len = sm->xxkey_len;
48 } else if (sm->cur_pmksa) {
49 mpmk = sm->cur_pmksa->pmk;
50 mpmk_len = sm->cur_pmksa->pmk_len;
51 } else {
52 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
53 "derivation");
54 return -1;
55 }
56
57 sm->pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
58 if (wpa_derive_pmk_r0(mpmk, mpmk_len, sm->ssid,
59 sm->ssid_len, sm->mobility_domain,
60 sm->r0kh_id, sm->r0kh_id_len, sm->own_addr,
61 sm->pmk_r0, sm->pmk_r0_name, use_sha384) < 0)
62 return -1;
63 sm->pmk_r1_len = sm->pmk_r0_len;
64 if (wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_len, sm->pmk_r0_name,
65 sm->r1kh_id, sm->own_addr, sm->pmk_r1,
66 sm->pmk_r1_name) < 0)
67 return -1;
68
69 wpa_ft_pasn_store_r1kh(sm, src_addr);
70
71 if (sm->force_kdk_derivation ||
72 (sm->secure_ltf &&
73 ieee802_11_rsnx_capab(sm->ap_rsnxe, WLAN_RSNX_CAPAB_SECURE_LTF)))
74 kdk_len = WPA_KDK_MAX_LEN;
75 else
76 kdk_len = 0;
77
78 return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len, sm->snonce, anonce,
79 #ifdef CONFIG_MLD_PATCH
80 sm->own_addr, wpa_sm_get_auth_addr(sm), sm->pmk_r1_name, ptk,
81 #else
82 sm->own_addr, sm->bssid, sm->pmk_r1_name, ptk,
83 #endif
84 ptk_name, sm->key_mgmt, sm->pairwise_cipher,
85 kdk_len);
86 }
87
88
89 /**
90 * wpa_sm_set_ft_params - Set FT (IEEE 802.11r) parameters
91 * @sm: Pointer to WPA state machine data from wpa_sm_init()
92 * @ies: Association Response IEs or %NULL to clear FT parameters
93 * @ies_len: Length of ies buffer in octets
94 * Returns: 0 on success, -1 on failure
95 */
wpa_sm_set_ft_params(struct wpa_sm *sm, const u8 *ies, size_t ies_len)96 int wpa_sm_set_ft_params(struct wpa_sm *sm, const u8 *ies, size_t ies_len)
97 {
98 struct wpa_ft_ies ft;
99 int use_sha384;
100
101 if (sm == NULL)
102 return 0;
103
104 if (!get_ie(ies, ies_len, WLAN_EID_MOBILITY_DOMAIN)) {
105 os_free(sm->assoc_resp_ies);
106 sm->assoc_resp_ies = NULL;
107 sm->assoc_resp_ies_len = 0;
108 os_memset(sm->mobility_domain, 0, MOBILITY_DOMAIN_ID_LEN);
109 os_memset(sm->r0kh_id, 0, FT_R0KH_ID_MAX_LEN);
110 sm->r0kh_id_len = 0;
111 os_memset(sm->r1kh_id, 0, FT_R1KH_ID_LEN);
112 return 0;
113 }
114
115 use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt);
116 if (wpa_ft_parse_ies(ies, ies_len, &ft, use_sha384) < 0)
117 return -1;
118
119 if (ft.mdie_len < MOBILITY_DOMAIN_ID_LEN + 1)
120 return -1;
121
122 wpa_hexdump(MSG_DEBUG, "FT: Mobility domain",
123 ft.mdie, MOBILITY_DOMAIN_ID_LEN);
124 os_memcpy(sm->mobility_domain, ft.mdie, MOBILITY_DOMAIN_ID_LEN);
125 sm->mdie_ft_capab = ft.mdie[MOBILITY_DOMAIN_ID_LEN];
126 wpa_printf(MSG_DEBUG, "FT: Capability and Policy: 0x%02x",
127 sm->mdie_ft_capab);
128
129 if (ft.r0kh_id) {
130 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID",
131 ft.r0kh_id, ft.r0kh_id_len);
132 os_memcpy(sm->r0kh_id, ft.r0kh_id, ft.r0kh_id_len);
133 sm->r0kh_id_len = ft.r0kh_id_len;
134 } else {
135 /* FIX: When should R0KH-ID be cleared? We need to keep the
136 * old R0KH-ID in order to be able to use this during FT. */
137 /*
138 * os_memset(sm->r0kh_id, 0, FT_R0KH_ID_LEN);
139 * sm->r0kh_id_len = 0;
140 */
141 }
142
143 if (ft.r1kh_id) {
144 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID",
145 ft.r1kh_id, FT_R1KH_ID_LEN);
146 os_memcpy(sm->r1kh_id, ft.r1kh_id, FT_R1KH_ID_LEN);
147 } else
148 os_memset(sm->r1kh_id, 0, FT_R1KH_ID_LEN);
149
150 os_free(sm->assoc_resp_ies);
151 sm->assoc_resp_ies = os_malloc(ft.mdie_len + 2 + ft.ftie_len + 2);
152 if (sm->assoc_resp_ies) {
153 u8 *pos = sm->assoc_resp_ies;
154
155 os_memcpy(pos, ft.mdie - 2, ft.mdie_len + 2);
156 pos += ft.mdie_len + 2;
157
158 if (ft.ftie) {
159 os_memcpy(pos, ft.ftie - 2, ft.ftie_len + 2);
160 pos += ft.ftie_len + 2;
161 }
162 sm->assoc_resp_ies_len = pos - sm->assoc_resp_ies;
163 wpa_hexdump(MSG_DEBUG, "FT: Stored MDIE and FTIE from "
164 "(Re)Association Response",
165 sm->assoc_resp_ies, sm->assoc_resp_ies_len);
166 }
167
168 return 0;
169 }
170
171
172 /**
173 * wpa_ft_gen_req_ies - Generate FT (IEEE 802.11r) IEs for Auth/ReAssoc Request
174 * @sm: Pointer to WPA state machine data from wpa_sm_init()
175 * @len: Buffer for returning the length of the IEs
176 * @anonce: ANonce or %NULL if not yet available
177 * @pmk_name: PMKR0Name or PMKR1Name to be added into the RSN IE PMKID List
178 * @kck: 128-bit KCK for MIC or %NULL if no MIC is used
179 * @kck_len: KCK length in octets
180 * @target_ap: Target AP address
181 * @ric_ies: Optional IE(s), e.g., WMM TSPEC(s), for RIC-Request or %NULL
182 * @ric_ies_len: Length of ric_ies buffer in octets
183 * @ap_mdie: Mobility Domain IE from the target AP
184 * @omit_rsnxe: Whether RSNXE is omitted from Reassociation Request frame
185 * Returns: Pointer to buffer with IEs or %NULL on failure
186 *
187 * Caller is responsible for freeing the returned buffer with os_free();
188 */
wpa_ft_gen_req_ies(struct wpa_sm *sm, size_t *len, const u8 *anonce, const u8 *pmk_name, const u8 *kck, size_t kck_len, const u8 *target_ap, const u8 *ric_ies, size_t ric_ies_len, const u8 *ap_mdie, int omit_rsnxe)189 static u8 * wpa_ft_gen_req_ies(struct wpa_sm *sm, size_t *len,
190 const u8 *anonce, const u8 *pmk_name,
191 const u8 *kck, size_t kck_len,
192 const u8 *target_ap,
193 const u8 *ric_ies, size_t ric_ies_len,
194 const u8 *ap_mdie, int omit_rsnxe)
195 {
196 size_t buf_len;
197 u8 *buf, *pos, *ftie_len, *ftie_pos, *fte_mic, *elem_count;
198 struct rsn_mdie *mdie;
199 struct rsn_ie_hdr *rsnie;
200 int mdie_len;
201 u8 rsnxe[10];
202 size_t rsnxe_len;
203 int rsnxe_used;
204 int res;
205
206 sm->ft_completed = 0;
207 sm->ft_reassoc_completed = 0;
208
209 buf_len = 2 + sizeof(struct rsn_mdie) + 2 +
210 sizeof(struct rsn_ftie_sha384) +
211 2 + sm->r0kh_id_len + ric_ies_len + 100;
212 buf = os_zalloc(buf_len);
213 if (buf == NULL)
214 return NULL;
215 pos = buf;
216
217 /* RSNIE[PMKR0Name/PMKR1Name] */
218 rsnie = (struct rsn_ie_hdr *) pos;
219 rsnie->elem_id = WLAN_EID_RSN;
220 WPA_PUT_LE16(rsnie->version, RSN_VERSION);
221 pos = (u8 *) (rsnie + 1);
222
223 /* Group Suite Selector */
224 if (!wpa_cipher_valid_group(sm->group_cipher)) {
225 wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)",
226 sm->group_cipher);
227 os_free(buf);
228 return NULL;
229 }
230 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
231 sm->group_cipher));
232 pos += RSN_SELECTOR_LEN;
233
234 /* Pairwise Suite Count */
235 WPA_PUT_LE16(pos, 1);
236 pos += 2;
237
238 /* Pairwise Suite List */
239 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
240 wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)",
241 sm->pairwise_cipher);
242 os_free(buf);
243 return NULL;
244 }
245 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
246 sm->pairwise_cipher));
247 pos += RSN_SELECTOR_LEN;
248
249 /* Authenticated Key Management Suite Count */
250 WPA_PUT_LE16(pos, 1);
251 pos += 2;
252
253 /* Authenticated Key Management Suite List */
254 if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X)
255 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
256 #ifdef CONFIG_SHA384
257 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
258 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384);
259 #endif /* CONFIG_SHA384 */
260 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_PSK)
261 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
262 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE)
263 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
264 #ifdef CONFIG_FILS
265 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA256)
266 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256);
267 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA384)
268 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384);
269 #endif /* CONFIG_FILS */
270 else {
271 wpa_printf(MSG_WARNING, "FT: Invalid key management type (%d)",
272 sm->key_mgmt);
273 os_free(buf);
274 return NULL;
275 }
276 pos += RSN_SELECTOR_LEN;
277
278 /* RSN Capabilities */
279 WPA_PUT_LE16(pos, rsn_supp_capab(sm));
280 pos += 2;
281
282 /* PMKID Count */
283 WPA_PUT_LE16(pos, 1);
284 pos += 2;
285
286 /* PMKID List [PMKR0Name/PMKR1Name] */
287 os_memcpy(pos, pmk_name, WPA_PMK_NAME_LEN);
288 pos += WPA_PMK_NAME_LEN;
289
290 /* Management Group Cipher Suite */
291 switch (sm->mgmt_group_cipher) {
292 case WPA_CIPHER_AES_128_CMAC:
293 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
294 pos += RSN_SELECTOR_LEN;
295 break;
296 case WPA_CIPHER_BIP_GMAC_128:
297 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_GMAC_128);
298 pos += RSN_SELECTOR_LEN;
299 break;
300 case WPA_CIPHER_BIP_GMAC_256:
301 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_GMAC_256);
302 pos += RSN_SELECTOR_LEN;
303 break;
304 case WPA_CIPHER_BIP_CMAC_256:
305 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_CMAC_256);
306 pos += RSN_SELECTOR_LEN;
307 break;
308 }
309
310 rsnie->len = (pos - (u8 *) rsnie) - 2;
311
312 /* MDIE */
313 mdie_len = wpa_ft_add_mdie(sm, pos, buf_len - (pos - buf), ap_mdie);
314 if (mdie_len <= 0) {
315 os_free(buf);
316 return NULL;
317 }
318 mdie = (struct rsn_mdie *) (pos + 2);
319 pos += mdie_len;
320
321 /* FTIE[SNonce, [R1KH-ID,] R0KH-ID ] */
322 ftie_pos = pos;
323 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
324 ftie_len = pos++;
325 rsnxe_used = wpa_key_mgmt_sae(sm->key_mgmt) && anonce &&
326 (sm->sae_pwe == 1 || sm->sae_pwe == 2);
327 #ifdef CONFIG_TESTING_OPTIONS
328 if (anonce && sm->ft_rsnxe_used) {
329 rsnxe_used = sm->ft_rsnxe_used == 1;
330 wpa_printf(MSG_DEBUG, "TESTING: FT: Force RSNXE Used %d",
331 rsnxe_used);
332 }
333 #endif /* CONFIG_TESTING_OPTIONS */
334 if (wpa_key_mgmt_sha384(sm->key_mgmt)) {
335 struct rsn_ftie_sha384 *ftie;
336
337 ftie = (struct rsn_ftie_sha384 *) pos;
338 ftie->mic_control[0] = !!rsnxe_used;
339 fte_mic = ftie->mic;
340 elem_count = &ftie->mic_control[1];
341 pos += sizeof(*ftie);
342 os_memcpy(ftie->snonce, sm->snonce, WPA_NONCE_LEN);
343 if (anonce)
344 os_memcpy(ftie->anonce, anonce, WPA_NONCE_LEN);
345 } else {
346 struct rsn_ftie *ftie;
347
348 ftie = (struct rsn_ftie *) pos;
349 ftie->mic_control[0] = !!rsnxe_used;
350 fte_mic = ftie->mic;
351 elem_count = &ftie->mic_control[1];
352 pos += sizeof(*ftie);
353 os_memcpy(ftie->snonce, sm->snonce, WPA_NONCE_LEN);
354 if (anonce)
355 os_memcpy(ftie->anonce, anonce, WPA_NONCE_LEN);
356 }
357 if (kck) {
358 /* R1KH-ID sub-element in third FT message */
359 *pos++ = FTIE_SUBELEM_R1KH_ID;
360 *pos++ = FT_R1KH_ID_LEN;
361 os_memcpy(pos, sm->r1kh_id, FT_R1KH_ID_LEN);
362 pos += FT_R1KH_ID_LEN;
363 }
364 /* R0KH-ID sub-element */
365 *pos++ = FTIE_SUBELEM_R0KH_ID;
366 *pos++ = sm->r0kh_id_len;
367 os_memcpy(pos, sm->r0kh_id, sm->r0kh_id_len);
368 pos += sm->r0kh_id_len;
369 #ifdef CONFIG_OCV
370 if (kck && wpa_sm_ocv_enabled(sm)) {
371 /* OCI sub-element in the third FT message */
372 struct wpa_channel_info ci;
373
374 if (wpa_sm_channel_info(sm, &ci) != 0) {
375 wpa_printf(MSG_WARNING,
376 "Failed to get channel info for OCI element in FTE");
377 os_free(buf);
378 return NULL;
379 }
380 #ifdef CONFIG_TESTING_OPTIONS
381 if (sm->oci_freq_override_ft_assoc) {
382 wpa_printf(MSG_INFO,
383 "TEST: Override OCI KDE frequency %d -> %d MHz",
384 ci.frequency, sm->oci_freq_override_ft_assoc);
385 ci.frequency = sm->oci_freq_override_ft_assoc;
386 }
387 #endif /* CONFIG_TESTING_OPTIONS */
388
389 *pos++ = FTIE_SUBELEM_OCI;
390 *pos++ = OCV_OCI_LEN;
391 if (ocv_insert_oci(&ci, &pos) < 0) {
392 os_free(buf);
393 return NULL;
394 }
395 }
396 #endif /* CONFIG_OCV */
397 *ftie_len = pos - ftie_len - 1;
398
399 if (ric_ies) {
400 /* RIC Request */
401 os_memcpy(pos, ric_ies, ric_ies_len);
402 pos += ric_ies_len;
403 }
404
405 if (omit_rsnxe) {
406 rsnxe_len = 0;
407 } else {
408 res = wpa_gen_rsnxe(sm, rsnxe, sizeof(rsnxe));
409 if (res < 0) {
410 os_free(buf);
411 return NULL;
412 }
413 rsnxe_len = res;
414 }
415
416 if (kck) {
417 /*
418 * IEEE Std 802.11r-2008, 11A.8.4
419 * MIC shall be calculated over:
420 * non-AP STA MAC address
421 * Target AP MAC address
422 * Transaction seq number (5 for ReassocReq, 3 otherwise)
423 * RSN IE
424 * MDIE
425 * FTIE (with MIC field set to 0)
426 * RIC-Request (if present)
427 * RSNXE (if present)
428 */
429 /* Information element count */
430 *elem_count = 3 + ieee802_11_ie_count(ric_ies, ric_ies_len);
431 if (rsnxe_len)
432 *elem_count += 1;
433 if (wpa_ft_mic(kck, kck_len, sm->own_addr, target_ap, 5,
434 ((u8 *) mdie) - 2, 2 + sizeof(*mdie),
435 ftie_pos, 2 + *ftie_len,
436 (u8 *) rsnie, 2 + rsnie->len, ric_ies,
437 ric_ies_len, rsnxe_len ? rsnxe : NULL, rsnxe_len,
438 fte_mic) < 0) {
439 wpa_printf(MSG_INFO, "FT: Failed to calculate MIC");
440 os_free(buf);
441 return NULL;
442 }
443 }
444
445 *len = pos - buf;
446
447 return buf;
448 }
449
450
wpa_ft_install_ptk(struct wpa_sm *sm, const u8 *bssid)451 static int wpa_ft_install_ptk(struct wpa_sm *sm, const u8 *bssid)
452 {
453 int keylen;
454 enum wpa_alg alg;
455 u8 null_rsc[6] = { 0, 0, 0, 0, 0, 0 };
456
457 wpa_printf(MSG_DEBUG, "FT: Installing PTK to the driver.");
458
459 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
460 wpa_printf(MSG_WARNING, "FT: Unsupported pairwise cipher %d",
461 sm->pairwise_cipher);
462 return -1;
463 }
464
465 alg = wpa_cipher_to_alg(sm->pairwise_cipher);
466 keylen = wpa_cipher_key_len(sm->pairwise_cipher);
467
468 #ifdef CONFIG_MLD_PATCH
469 if (wpa_sm_set_key(sm, -1, alg, bssid, 0, 1, null_rsc, sizeof(null_rsc),
470 #else
471 if (wpa_sm_set_key(sm, alg, bssid, 0, 1, null_rsc, sizeof(null_rsc),
472 #endif
473 (u8 *) sm->ptk.tk, keylen,
474 KEY_FLAG_PAIRWISE_RX_TX) < 0) {
475 wpa_printf(MSG_WARNING, "FT: Failed to set PTK to the driver");
476 return -1;
477 }
478
479 wpa_sm_store_ptk(sm, sm->bssid, sm->pairwise_cipher,
480 sm->dot11RSNAConfigPMKLifetime, &sm->ptk);
481 return 0;
482 }
483
484
485 /**
486 * wpa_ft_prepare_auth_request - Generate over-the-air auth request
487 * @sm: Pointer to WPA state machine data from wpa_sm_init()
488 * @mdie: Target AP MDIE
489 * Returns: 0 on success, -1 on failure
490 */
491 int wpa_ft_prepare_auth_request(struct wpa_sm *sm, const u8 *mdie)
492 {
493 u8 *ft_ies;
494 size_t ft_ies_len;
495
496 /* Generate a new SNonce */
497 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
498 wpa_printf(MSG_INFO, "FT: Failed to generate a new SNonce");
499 return -1;
500 }
501
502 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, NULL, sm->pmk_r0_name,
503 NULL, 0, sm->bssid, NULL, 0, mdie, 0);
504 if (ft_ies) {
505 wpa_sm_update_ft_ies(sm, sm->mobility_domain,
506 ft_ies, ft_ies_len);
507 os_free(ft_ies);
508 }
509
510 return 0;
511 }
512
513
514 int wpa_ft_add_mdie(struct wpa_sm *sm, u8 *buf, size_t buf_len,
515 const u8 *ap_mdie)
516 {
517 u8 *pos = buf;
518 struct rsn_mdie *mdie;
519
520 if (buf_len < 2 + sizeof(*mdie)) {
521 wpa_printf(MSG_INFO,
522 "FT: Failed to add MDIE: short buffer, length=%zu",
523 buf_len);
524 return 0;
525 }
526
527 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
528 *pos++ = sizeof(*mdie);
529 mdie = (struct rsn_mdie *) pos;
530 os_memcpy(mdie->mobility_domain, sm->mobility_domain,
531 MOBILITY_DOMAIN_ID_LEN);
532 mdie->ft_capab = ap_mdie && ap_mdie[1] >= 3 ? ap_mdie[4] :
533 sm->mdie_ft_capab;
534
535 return 2 + sizeof(*mdie);
536 }
537
538
539 const u8 * wpa_sm_get_ft_md(struct wpa_sm *sm)
540 {
541 return sm->mobility_domain;
542 }
543
544
545 int wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
546 int ft_action, const u8 *target_ap,
547 const u8 *ric_ies, size_t ric_ies_len)
548 {
549 u8 *ft_ies;
550 size_t ft_ies_len;
551 struct wpa_ft_ies parse;
552 struct rsn_mdie *mdie;
553 u8 ptk_name[WPA_PMK_NAME_LEN];
554 int ret;
555 const u8 *bssid;
556 const u8 *kck;
557 size_t kck_len, kdk_len;
558 int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt);
559 const u8 *anonce, *snonce;
560
561 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
562 wpa_hexdump(MSG_DEBUG, "FT: RIC IEs", ric_ies, ric_ies_len);
563
564 if (ft_action) {
565 if (!sm->over_the_ds_in_progress) {
566 wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
567 "- drop FT Action Response");
568 return -1;
569 }
570
571 if (os_memcmp(target_ap, sm->target_ap, ETH_ALEN) != 0) {
572 wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
573 "with this Target AP - drop FT Action "
574 "Response");
575 return -1;
576 }
577 }
578
579 if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
580 wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
581 "enabled for this connection");
582 return -1;
583 }
584
585 if (wpa_ft_parse_ies(ies, ies_len, &parse, use_sha384) < 0) {
586 wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
587 return -1;
588 }
589
590 mdie = (struct rsn_mdie *) parse.mdie;
591 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
592 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
593 MOBILITY_DOMAIN_ID_LEN) != 0) {
594 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
595 return -1;
596 }
597
598 if (use_sha384) {
599 struct rsn_ftie_sha384 *ftie;
600
601 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
602 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
603 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
604 return -1;
605 }
606
607 anonce = ftie->anonce;
608 snonce = ftie->snonce;
609 } else {
610 struct rsn_ftie *ftie;
611
612 ftie = (struct rsn_ftie *) parse.ftie;
613 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
614 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
615 return -1;
616 }
617
618 anonce = ftie->anonce;
619 snonce = ftie->snonce;
620 }
621
622 if (os_memcmp(snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
623 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
624 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
625 snonce, WPA_NONCE_LEN);
626 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
627 sm->snonce, WPA_NONCE_LEN);
628 return -1;
629 }
630
631 if (parse.r0kh_id == NULL) {
632 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
633 return -1;
634 }
635
636 if (parse.r0kh_id_len != sm->r0kh_id_len ||
637 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
638 {
639 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
640 "the current R0KH-ID");
641 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
642 parse.r0kh_id, parse.r0kh_id_len);
643 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
644 sm->r0kh_id, sm->r0kh_id_len);
645 return -1;
646 }
647
648 if (parse.r1kh_id == NULL) {
649 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
650 return -1;
651 }
652
653 if (parse.rsn_pmkid == NULL ||
654 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r0_name, WPA_PMK_NAME_LEN))
655 {
656 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name (PMKID) in "
657 "RSNIE");
658 return -1;
659 }
660
661 if (sm->mfp == 2 && !(parse.rsn_capab & WPA_CAPABILITY_MFPC)) {
662 wpa_printf(MSG_INFO,
663 "FT: Target AP does not support PMF, but local configuration requires that");
664 return -1;
665 }
666
667 os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
668 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", sm->r1kh_id, FT_R1KH_ID_LEN);
669 wpa_hexdump(MSG_DEBUG, "FT: SNonce", sm->snonce, WPA_NONCE_LEN);
670 wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN);
671 os_memcpy(sm->anonce, anonce, WPA_NONCE_LEN);
672 if (wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_len, sm->pmk_r0_name,
673 sm->r1kh_id, sm->own_addr, sm->pmk_r1,
674 sm->pmk_r1_name) < 0)
675 return -1;
676 sm->pmk_r1_len = sm->pmk_r0_len;
677
678 bssid = target_ap;
679
680 wpa_ft_pasn_store_r1kh(sm, bssid);
681
682 if (sm->force_kdk_derivation ||
683 (sm->secure_ltf &&
684 ieee802_11_rsnx_capab(sm->ap_rsnxe, WLAN_RSNX_CAPAB_SECURE_LTF)))
685 kdk_len = WPA_KDK_MAX_LEN;
686 else
687 kdk_len = 0;
688
689 if (wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len, sm->snonce,
690 anonce, sm->own_addr, bssid,
691 sm->pmk_r1_name, &sm->ptk, ptk_name, sm->key_mgmt,
692 sm->pairwise_cipher,
693 kdk_len) < 0)
694 return -1;
695
696 if (wpa_key_mgmt_fils(sm->key_mgmt)) {
697 kck = sm->ptk.kck2;
698 kck_len = sm->ptk.kck2_len;
699 } else {
700 kck = sm->ptk.kck;
701 kck_len = sm->ptk.kck_len;
702 }
703 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, anonce,
704 sm->pmk_r1_name,
705 kck, kck_len, bssid,
706 ric_ies, ric_ies_len,
707 parse.mdie ? parse.mdie - 2 : NULL,
708 !sm->ap_rsnxe);
709 if (ft_ies) {
710 wpa_sm_update_ft_ies(sm, sm->mobility_domain,
711 ft_ies, ft_ies_len);
712 os_free(ft_ies);
713 }
714
715 wpa_sm_mark_authenticated(sm, bssid);
716 ret = wpa_ft_install_ptk(sm, bssid);
717 if (ret) {
718 /*
719 * Some drivers do not support key configuration when we are
720 * not associated with the target AP. Work around this by
721 * trying again after the following reassociation gets
722 * completed.
723 */
724 wpa_printf(MSG_DEBUG, "FT: Failed to set PTK prior to "
725 "association - try again after reassociation");
726 sm->set_ptk_after_assoc = 1;
727 } else
728 sm->set_ptk_after_assoc = 0;
729
730 sm->ft_completed = 1;
731 if (ft_action) {
732 /*
733 * The caller is expected trigger re-association with the
734 * Target AP.
735 */
736 os_memcpy(sm->bssid, target_ap, ETH_ALEN);
737 }
738
739 return 0;
740 }
741
742
743 int wpa_ft_is_completed(struct wpa_sm *sm)
744 {
745 if (sm == NULL)
746 return 0;
747
748 if (!wpa_key_mgmt_ft(sm->key_mgmt))
749 return 0;
750
751 return sm->ft_completed;
752 }
753
754
755 void wpa_reset_ft_completed(struct wpa_sm *sm)
756 {
757 if (sm != NULL)
758 sm->ft_completed = 0;
759 }
760
761
762 static int wpa_ft_process_gtk_subelem(struct wpa_sm *sm, const u8 *gtk_elem,
763 size_t gtk_elem_len)
764 {
765 u8 gtk[32];
766 int keyidx;
767 enum wpa_alg alg;
768 size_t gtk_len, keylen, rsc_len;
769 const u8 *kek;
770 size_t kek_len;
771
772 if (wpa_key_mgmt_fils(sm->key_mgmt)) {
773 kek = sm->ptk.kek2;
774 kek_len = sm->ptk.kek2_len;
775 } else {
776 kek = sm->ptk.kek;
777 kek_len = sm->ptk.kek_len;
778 }
779
780 if (gtk_elem == NULL) {
781 wpa_printf(MSG_DEBUG, "FT: No GTK included in FTIE");
782 return 0;
783 }
784
785 wpa_hexdump_key(MSG_DEBUG, "FT: Received GTK in Reassoc Resp",
786 gtk_elem, gtk_elem_len);
787
788 if (gtk_elem_len < 11 + 24 || (gtk_elem_len - 11) % 8 ||
789 gtk_elem_len - 19 > sizeof(gtk)) {
790 wpa_printf(MSG_DEBUG, "FT: Invalid GTK sub-elem "
791 "length %lu", (unsigned long) gtk_elem_len);
792 return -1;
793 }
794 gtk_len = gtk_elem_len - 19;
795 if (aes_unwrap(kek, kek_len, gtk_len / 8, gtk_elem + 11, gtk)) {
796 wpa_printf(MSG_WARNING, "FT: AES unwrap failed - could not "
797 "decrypt GTK");
798 return -1;
799 }
800
801 keylen = wpa_cipher_key_len(sm->group_cipher);
802 rsc_len = wpa_cipher_rsc_len(sm->group_cipher);
803 alg = wpa_cipher_to_alg(sm->group_cipher);
804 if (alg == WPA_ALG_NONE) {
805 wpa_printf(MSG_WARNING, "WPA: Unsupported Group Cipher %d",
806 sm->group_cipher);
807 return -1;
808 }
809
810 if (gtk_len < keylen) {
811 wpa_printf(MSG_DEBUG, "FT: Too short GTK in FTIE");
812 return -1;
813 }
814
815 /* Key Info[2] | Key Length[1] | RSC[8] | Key[5..32]. */
816
817 keyidx = WPA_GET_LE16(gtk_elem) & 0x03;
818
819 if (gtk_elem[2] != keylen) {
820 wpa_printf(MSG_DEBUG, "FT: GTK length mismatch: received %d "
821 "negotiated %lu",
822 gtk_elem[2], (unsigned long) keylen);
823 return -1;
824 }
825
826 wpa_hexdump_key(MSG_DEBUG, "FT: GTK from Reassoc Resp", gtk, keylen);
827 if (sm->group_cipher == WPA_CIPHER_TKIP) {
828 /* Swap Tx/Rx keys for Michael MIC */
829 u8 tmp[8];
830 os_memcpy(tmp, gtk + 16, 8);
831 os_memcpy(gtk + 16, gtk + 24, 8);
832 os_memcpy(gtk + 24, tmp, 8);
833 }
834 #ifdef CONFIG_MLD_PATCH
835 if (wpa_sm_set_key(sm, -1, alg, broadcast_ether_addr, keyidx, 0,
836 #else
837 if (wpa_sm_set_key(sm, alg, broadcast_ether_addr, keyidx, 0,
838 #endif
839 gtk_elem + 3, rsc_len, gtk, keylen,
840 KEY_FLAG_GROUP_RX) < 0) {
841 wpa_printf(MSG_WARNING, "WPA: Failed to set GTK to the "
842 "driver.");
843 return -1;
844 }
845
846 return 0;
847 }
848
849
850 static int wpa_ft_process_igtk_subelem(struct wpa_sm *sm, const u8 *igtk_elem,
851 size_t igtk_elem_len)
852 {
853 u8 igtk[WPA_IGTK_MAX_LEN];
854 size_t igtk_len;
855 u16 keyidx;
856 const u8 *kek;
857 size_t kek_len;
858
859 if (wpa_key_mgmt_fils(sm->key_mgmt)) {
860 kek = sm->ptk.kek2;
861 kek_len = sm->ptk.kek2_len;
862 } else {
863 kek = sm->ptk.kek;
864 kek_len = sm->ptk.kek_len;
865 }
866
867 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC &&
868 sm->mgmt_group_cipher != WPA_CIPHER_BIP_GMAC_128 &&
869 sm->mgmt_group_cipher != WPA_CIPHER_BIP_GMAC_256 &&
870 sm->mgmt_group_cipher != WPA_CIPHER_BIP_CMAC_256)
871 return 0;
872
873 if (igtk_elem == NULL) {
874 wpa_printf(MSG_DEBUG, "FT: No IGTK included in FTIE");
875 return 0;
876 }
877
878 wpa_hexdump_key(MSG_DEBUG, "FT: Received IGTK in Reassoc Resp",
879 igtk_elem, igtk_elem_len);
880
881 igtk_len = wpa_cipher_key_len(sm->mgmt_group_cipher);
882 if (igtk_elem_len != 2 + 6 + 1 + igtk_len + 8) {
883 wpa_printf(MSG_DEBUG, "FT: Invalid IGTK sub-elem "
884 "length %lu", (unsigned long) igtk_elem_len);
885 return -1;
886 }
887 if (igtk_elem[8] != igtk_len) {
888 wpa_printf(MSG_DEBUG, "FT: Invalid IGTK sub-elem Key Length "
889 "%d", igtk_elem[8]);
890 return -1;
891 }
892
893 if (aes_unwrap(kek, kek_len, igtk_len / 8, igtk_elem + 9, igtk)) {
894 wpa_printf(MSG_WARNING, "FT: AES unwrap failed - could not "
895 "decrypt IGTK");
896 return -1;
897 }
898
899 /* KeyID[2] | IPN[6] | Key Length[1] | Key[16+8] */
900
901 keyidx = WPA_GET_LE16(igtk_elem);
902
903 wpa_hexdump_key(MSG_DEBUG, "FT: IGTK from Reassoc Resp", igtk,
904 igtk_len);
905 #ifdef CONFIG_MLD_PATCH
906 if (wpa_sm_set_key(sm, -1, wpa_cipher_to_alg(sm->mgmt_group_cipher),
907 #else
908 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
909 #endif
910 broadcast_ether_addr, keyidx, 0,
911 igtk_elem + 2, 6, igtk, igtk_len,
912 KEY_FLAG_GROUP_RX) < 0) {
913 wpa_printf(MSG_WARNING, "WPA: Failed to set IGTK to the "
914 "driver.");
915 forced_memzero(igtk, sizeof(igtk));
916 return -1;
917 }
918 forced_memzero(igtk, sizeof(igtk));
919
920 return 0;
921 }
922
923
924 static int wpa_ft_process_bigtk_subelem(struct wpa_sm *sm, const u8 *bigtk_elem,
925 size_t bigtk_elem_len)
926 {
927 u8 bigtk[WPA_BIGTK_MAX_LEN];
928 size_t bigtk_len;
929 u16 keyidx;
930 const u8 *kek;
931 size_t kek_len;
932
933 if (!sm->beacon_prot || !bigtk_elem ||
934 (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC &&
935 sm->mgmt_group_cipher != WPA_CIPHER_BIP_GMAC_128 &&
936 sm->mgmt_group_cipher != WPA_CIPHER_BIP_GMAC_256 &&
937 sm->mgmt_group_cipher != WPA_CIPHER_BIP_CMAC_256))
938 return 0;
939
940 if (wpa_key_mgmt_fils(sm->key_mgmt)) {
941 kek = sm->ptk.kek2;
942 kek_len = sm->ptk.kek2_len;
943 } else {
944 kek = sm->ptk.kek;
945 kek_len = sm->ptk.kek_len;
946 }
947
948 wpa_hexdump_key(MSG_DEBUG, "FT: Received BIGTK in Reassoc Resp",
949 bigtk_elem, bigtk_elem_len);
950
951 bigtk_len = wpa_cipher_key_len(sm->mgmt_group_cipher);
952 if (bigtk_elem_len != 2 + 6 + 1 + bigtk_len + 8) {
953 wpa_printf(MSG_DEBUG,
954 "FT: Invalid BIGTK sub-elem length %lu",
955 (unsigned long) bigtk_elem_len);
956 return -1;
957 }
958 if (bigtk_elem[8] != bigtk_len) {
959 wpa_printf(MSG_DEBUG,
960 "FT: Invalid BIGTK sub-elem Key Length %d",
961 bigtk_elem[8]);
962 return -1;
963 }
964
965 if (aes_unwrap(kek, kek_len, bigtk_len / 8, bigtk_elem + 9, bigtk)) {
966 wpa_printf(MSG_WARNING,
967 "FT: AES unwrap failed - could not decrypt BIGTK");
968 return -1;
969 }
970
971 /* KeyID[2] | IPN[6] | Key Length[1] | Key[16+8] */
972
973 keyidx = WPA_GET_LE16(bigtk_elem);
974
975 wpa_hexdump_key(MSG_DEBUG, "FT: BIGTK from Reassoc Resp", bigtk,
976 bigtk_len);
977 #ifdef CONFIG_MLD_PATCH
978 if (wpa_sm_set_key(sm, -1, wpa_cipher_to_alg(sm->mgmt_group_cipher),
979 #else
980 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
981 #endif
982 broadcast_ether_addr, keyidx, 0,
983 bigtk_elem + 2, 6, bigtk, bigtk_len,
984 KEY_FLAG_GROUP_RX) < 0) {
985 wpa_printf(MSG_WARNING,
986 "WPA: Failed to set BIGTK to the driver");
987 forced_memzero(bigtk, sizeof(bigtk));
988 return -1;
989 }
990 forced_memzero(bigtk, sizeof(bigtk));
991
992 return 0;
993 }
994
995
996 int wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies,
997 size_t ies_len, const u8 *src_addr)
998 {
999 struct wpa_ft_ies parse;
1000 struct rsn_mdie *mdie;
1001 unsigned int count;
1002 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
1003 const u8 *kck;
1004 size_t kck_len;
1005 int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt);
1006 const u8 *anonce, *snonce, *fte_mic;
1007 u8 fte_elem_count;
1008 int own_rsnxe_used, rsnxe_used;
1009
1010 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
1011
1012 if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
1013 wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
1014 "enabled for this connection");
1015 return -1;
1016 }
1017
1018 if (sm->ft_reassoc_completed) {
1019 wpa_printf(MSG_DEBUG, "FT: Reassociation has already been completed for this FT protocol instance - ignore unexpected retransmission");
1020 return 0;
1021 }
1022
1023 if (wpa_ft_parse_ies(ies, ies_len, &parse, use_sha384) < 0) {
1024 wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
1025 return -1;
1026 }
1027
1028 mdie = (struct rsn_mdie *) parse.mdie;
1029 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1030 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
1031 MOBILITY_DOMAIN_ID_LEN) != 0) {
1032 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1033 return -1;
1034 }
1035
1036 if (use_sha384) {
1037 struct rsn_ftie_sha384 *ftie;
1038
1039 ftie = (struct rsn_ftie_sha384 *) parse.ftie;
1040 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
1041 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1042 return -1;
1043 }
1044
1045 anonce = ftie->anonce;
1046 snonce = ftie->snonce;
1047 rsnxe_used = ftie->mic_control[0] & 0x01;
1048 fte_elem_count = ftie->mic_control[1];
1049 fte_mic = ftie->mic;
1050 } else {
1051 struct rsn_ftie *ftie;
1052
1053 ftie = (struct rsn_ftie *) parse.ftie;
1054 if (!ftie || parse.ftie_len < sizeof(*ftie)) {
1055 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1056 return -1;
1057 }
1058
1059 anonce = ftie->anonce;
1060 snonce = ftie->snonce;
1061 rsnxe_used = ftie->mic_control[0] & 0x01;
1062 fte_elem_count = ftie->mic_control[1];
1063 fte_mic = ftie->mic;
1064 }
1065
1066 if (os_memcmp(snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
1067 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1068 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1069 snonce, WPA_NONCE_LEN);
1070 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1071 sm->snonce, WPA_NONCE_LEN);
1072 return -1;
1073 }
1074
1075 if (os_memcmp(anonce, sm->anonce, WPA_NONCE_LEN) != 0) {
1076 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1077 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1078 anonce, WPA_NONCE_LEN);
1079 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1080 sm->anonce, WPA_NONCE_LEN);
1081 return -1;
1082 }
1083
1084 if (parse.r0kh_id == NULL) {
1085 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1086 return -1;
1087 }
1088
1089 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1090 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
1091 {
1092 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1093 "the current R0KH-ID");
1094 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1095 parse.r0kh_id, parse.r0kh_id_len);
1096 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1097 sm->r0kh_id, sm->r0kh_id_len);
1098 return -1;
1099 }
1100
1101 if (parse.r1kh_id == NULL) {
1102 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1103 return -1;
1104 }
1105
1106 if (os_memcmp_const(parse.r1kh_id, sm->r1kh_id, FT_R1KH_ID_LEN) != 0) {
1107 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1108 "ReassocResp");
1109 return -1;
1110 }
1111
1112 if (parse.rsn_pmkid == NULL ||
1113 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
1114 {
1115 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1116 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1117 return -1;
1118 }
1119
1120 count = 3;
1121 if (parse.ric)
1122 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
1123 if (parse.rsnxe)
1124 count++;
1125 if (fte_elem_count != count) {
1126 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1127 "Control: received %u expected %u",
1128 fte_elem_count, count);
1129 return -1;
1130 }
1131
1132 if (wpa_key_mgmt_fils(sm->key_mgmt)) {
1133 kck = sm->ptk.kck2;
1134 kck_len = sm->ptk.kck2_len;
1135 } else {
1136 kck = sm->ptk.kck;
1137 kck_len = sm->ptk.kck_len;
1138 }
1139
1140 if (wpa_ft_mic(kck, kck_len, sm->own_addr, src_addr, 6,
1141 parse.mdie - 2, parse.mdie_len + 2,
1142 parse.ftie - 2, parse.ftie_len + 2,
1143 parse.rsn - 2, parse.rsn_len + 2,
1144 parse.ric, parse.ric_len,
1145 parse.rsnxe ? parse.rsnxe - 2 : NULL,
1146 parse.rsnxe ? parse.rsnxe_len + 2 : 0,
1147 mic) < 0) {
1148 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1149 return -1;
1150 }
1151
1152 if (os_memcmp_const(mic, fte_mic, 16) != 0) {
1153 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1154 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", fte_mic, 16);
1155 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1156 return -1;
1157 }
1158
1159 if (rsnxe_used && !sm->ap_rsnxe) {
1160 wpa_printf(MSG_INFO,
1161 "FT: FTE indicated that AP uses RSNXE, but RSNXE was not included in Beacon/Probe Response frames");
1162 return -1;
1163 }
1164
1165 if (!sm->ap_rsn_ie) {
1166 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1167 "FT: No RSNE for this AP known - trying to get from scan results");
1168 if (wpa_sm_get_beacon_ie(sm) < 0) {
1169 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1170 "FT: Could not find AP from the scan results");
1171 return -1;
1172 }
1173 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG,
1174 "FT: Found the current AP from updated scan results");
1175 }
1176
1177 if (sm->ap_rsn_ie &&
1178 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
1179 sm->ap_rsn_ie, sm->ap_rsn_ie_len,
1180 parse.rsn - 2, parse.rsn_len + 2)) {
1181 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1182 "FT: RSNE mismatch between Beacon/ProbeResp and FT protocol Reassociation Response frame");
1183 wpa_hexdump(MSG_INFO, "RSNE in Beacon/ProbeResp",
1184 sm->ap_rsn_ie, sm->ap_rsn_ie_len);
1185 wpa_hexdump(MSG_INFO,
1186 "RSNE in FT protocol Reassociation Response frame",
1187 parse.rsn ? parse.rsn - 2 : NULL,
1188 parse.rsn ? parse.rsn_len + 2 : 0);
1189 return -1;
1190 }
1191
1192 own_rsnxe_used = wpa_key_mgmt_sae(sm->key_mgmt) &&
1193 (sm->sae_pwe == 1 || sm->sae_pwe == 2);
1194 if ((sm->ap_rsnxe && !parse.rsnxe && own_rsnxe_used) ||
1195 (!sm->ap_rsnxe && parse.rsnxe) ||
1196 (sm->ap_rsnxe && parse.rsnxe &&
1197 (sm->ap_rsnxe_len != 2 + parse.rsnxe_len ||
1198 os_memcmp(sm->ap_rsnxe, parse.rsnxe - 2,
1199 sm->ap_rsnxe_len) != 0))) {
1200 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1201 "FT: RSNXE mismatch between Beacon/ProbeResp and FT protocol Reassociation Response frame");
1202 wpa_hexdump(MSG_INFO, "RSNXE in Beacon/ProbeResp",
1203 sm->ap_rsnxe, sm->ap_rsnxe_len);
1204 wpa_hexdump(MSG_INFO,
1205 "RSNXE in FT protocol Reassociation Response frame",
1206 parse.rsnxe ? parse.rsnxe - 2 : NULL,
1207 parse.rsnxe ? parse.rsnxe_len + 2 : 0);
1208 return -1;
1209 }
1210
1211 #ifdef CONFIG_OCV
1212 if (wpa_sm_ocv_enabled(sm)) {
1213 struct wpa_channel_info ci;
1214
1215 if (wpa_sm_channel_info(sm, &ci) != 0) {
1216 wpa_printf(MSG_WARNING,
1217 "Failed to get channel info to validate received OCI in (Re)Assoc Response");
1218 return -1;
1219 }
1220
1221 if (ocv_verify_tx_params(parse.oci, parse.oci_len, &ci,
1222 channel_width_to_int(ci.chanwidth),
1223 ci.seg1_idx) != OCI_SUCCESS) {
1224 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, OCV_FAILURE
1225 "addr=" MACSTR " frame=ft-assoc error=%s",
1226 MAC2STR(src_addr), ocv_errorstr);
1227 return -1;
1228 }
1229 }
1230 #endif /* CONFIG_OCV */
1231
1232 sm->ft_reassoc_completed = 1;
1233
1234 if (wpa_ft_process_gtk_subelem(sm, parse.gtk, parse.gtk_len) < 0 ||
1235 wpa_ft_process_igtk_subelem(sm, parse.igtk, parse.igtk_len) < 0 ||
1236 wpa_ft_process_bigtk_subelem(sm, parse.bigtk, parse.bigtk_len) < 0)
1237 return -1;
1238
1239 if (sm->set_ptk_after_assoc) {
1240 wpa_printf(MSG_DEBUG, "FT: Try to set PTK again now that we "
1241 "are associated");
1242 if (wpa_ft_install_ptk(sm, src_addr) < 0)
1243 return -1;
1244 sm->set_ptk_after_assoc = 0;
1245 }
1246
1247 if (parse.ric) {
1248 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Response",
1249 parse.ric, parse.ric_len);
1250 /* TODO: parse response and inform driver about results when
1251 * using wpa_supplicant SME */
1252 }
1253
1254 wpa_printf(MSG_DEBUG, "FT: Completed successfully");
1255
1256 return 0;
1257 }
1258
1259
1260 /**
1261 * wpa_ft_start_over_ds - Generate over-the-DS auth request
1262 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1263 * @target_ap: Target AP Address
1264 * @mdie: Mobility Domain IE from the target AP
1265 * Returns: 0 on success, -1 on failure
1266 */
1267 int wpa_ft_start_over_ds(struct wpa_sm *sm, const u8 *target_ap,
1268 const u8 *mdie)
1269 {
1270 u8 *ft_ies;
1271 size_t ft_ies_len;
1272
1273 wpa_printf(MSG_DEBUG, "FT: Request over-the-DS with " MACSTR_SEC,
1274 MAC2STR_SEC(target_ap));
1275
1276 /* Generate a new SNonce */
1277 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
1278 wpa_printf(MSG_INFO, "FT: Failed to generate a new SNonce");
1279 return -1;
1280 }
1281
1282 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, NULL, sm->pmk_r0_name,
1283 NULL, 0, target_ap, NULL, 0, mdie, 0);
1284 if (ft_ies) {
1285 sm->over_the_ds_in_progress = 1;
1286 os_memcpy(sm->target_ap, target_ap, ETH_ALEN);
1287 wpa_sm_send_ft_action(sm, 1, target_ap, ft_ies, ft_ies_len);
1288 os_free(ft_ies);
1289 }
1290
1291 return 0;
1292 }
1293
1294
1295 #ifdef CONFIG_PASN
1296
1297 static struct pasn_ft_r1kh * wpa_ft_pasn_get_r1kh(struct wpa_sm *sm,
1298 const u8 *bssid)
1299 {
1300 size_t i;
1301
1302 for (i = 0; i < sm->n_pasn_r1kh; i++)
1303 if (os_memcmp(sm->pasn_r1kh[i].bssid, bssid, ETH_ALEN) == 0)
1304 return &sm->pasn_r1kh[i];
1305
1306 return NULL;
1307 }
1308
1309
1310 static void wpa_ft_pasn_store_r1kh(struct wpa_sm *sm, const u8 *bssid)
1311 {
1312 struct pasn_ft_r1kh *tmp = wpa_ft_pasn_get_r1kh(sm, bssid);
1313
1314 if (tmp)
1315 return;
1316
1317 tmp = os_realloc_array(sm->pasn_r1kh, sm->n_pasn_r1kh + 1,
1318 sizeof(*tmp));
1319 if (!tmp) {
1320 wpa_printf(MSG_DEBUG, "PASN: FT: Failed to store R1KH");
1321 return;
1322 }
1323
1324 sm->pasn_r1kh = tmp;
1325 tmp = &sm->pasn_r1kh[sm->n_pasn_r1kh];
1326
1327 wpa_printf(MSG_DEBUG, "PASN: FT: Store R1KH for " MACSTR_SEC,
1328 MAC2STR_SEC(bssid));
1329
1330 os_memcpy(tmp->bssid, bssid, ETH_ALEN);
1331 os_memcpy(tmp->r1kh_id, sm->r1kh_id, FT_R1KH_ID_LEN);
1332
1333 sm->n_pasn_r1kh++;
1334 }
1335
1336
1337 int wpa_pasn_ft_derive_pmk_r1(struct wpa_sm *sm, int akmp, const u8 *bssid,
1338 u8 *pmk_r1, size_t *pmk_r1_len, u8 *pmk_r1_name)
1339 {
1340 struct pasn_ft_r1kh *r1kh_entry;
1341
1342 if (sm->key_mgmt != (unsigned int) akmp) {
1343 wpa_printf(MSG_DEBUG,
1344 "PASN: FT: Key management mismatch: %u != %u",
1345 sm->key_mgmt, akmp);
1346 return -1;
1347 }
1348
1349 r1kh_entry = wpa_ft_pasn_get_r1kh(sm, bssid);
1350 if (!r1kh_entry) {
1351 wpa_printf(MSG_DEBUG,
1352 "PASN: FT: Cannot find R1KH-ID for " MACSTR_SEC,
1353 MAC2STR_SEC(bssid));
1354 return -1;
1355 }
1356
1357 /*
1358 * Note: PMK R0 etc. were already derived and are maintained by the
1359 * state machine, and as the same key hierarchy is used, there is no
1360 * need to derive them again, so only derive PMK R1 etc.
1361 */
1362 if (wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_len, sm->pmk_r0_name,
1363 r1kh_entry->r1kh_id, sm->own_addr, pmk_r1,
1364 pmk_r1_name) < 0)
1365 return -1;
1366
1367 *pmk_r1_len = sm->pmk_r0_len;
1368
1369 wpa_hexdump_key(MSG_DEBUG, "PASN: FT: PMK-R1", pmk_r1, sm->pmk_r0_len);
1370 wpa_hexdump(MSG_DEBUG, "PASN: FT: PMKR1Name", pmk_r1_name,
1371 WPA_PMK_NAME_LEN);
1372
1373 return 0;
1374 }
1375
1376 #endif /* CONFIG_PASN */
1377
1378 #endif /* CONFIG_IEEE80211R */
1379