2 * WPA Supplicant - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2006-2015, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/aes_wrap.h"
13 #include "crypto/random.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/ieee802_11_common.h"
19 #ifdef CONFIG_IEEE80211R
21 int wpa_derive_ptk_ft(struct wpa_sm *sm, const unsigned char *src_addr,
22 const struct wpa_eapol_key *key, struct wpa_ptk *ptk)
24 u8 ptk_name[WPA_PMK_NAME_LEN];
25 const u8 *anonce = key->key_nonce;
27 if (sm->xxkey_len == 0) {
28 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
33 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, sm->ssid,
34 sm->ssid_len, sm->mobility_domain,
35 sm->r0kh_id, sm->r0kh_id_len, sm->own_addr,
36 sm->pmk_r0, sm->pmk_r0_name);
37 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", sm->pmk_r0, PMK_LEN);
38 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name",
39 sm->pmk_r0_name, WPA_PMK_NAME_LEN);
40 wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_name, sm->r1kh_id,
41 sm->own_addr, sm->pmk_r1, sm->pmk_r1_name);
42 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", sm->pmk_r1, PMK_LEN);
43 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
45 return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->snonce, anonce, sm->own_addr,
46 sm->bssid, sm->pmk_r1_name, ptk, ptk_name,
47 sm->key_mgmt, sm->pairwise_cipher);
52 * wpa_sm_set_ft_params - Set FT (IEEE 802.11r) parameters
53 * @sm: Pointer to WPA state machine data from wpa_sm_init()
54 * @ies: Association Response IEs or %NULL to clear FT parameters
55 * @ies_len: Length of ies buffer in octets
56 * Returns: 0 on success, -1 on failure
58 int wpa_sm_set_ft_params(struct wpa_sm *sm, const u8 *ies, size_t ies_len)
65 if (wpa_ft_parse_ies(ies, ies_len, &ft) < 0)
68 if (ft.mdie && ft.mdie_len < MOBILITY_DOMAIN_ID_LEN + 1)
72 wpa_hexdump(MSG_DEBUG, "FT: Mobility domain",
73 ft.mdie, MOBILITY_DOMAIN_ID_LEN);
74 os_memcpy(sm->mobility_domain, ft.mdie,
75 MOBILITY_DOMAIN_ID_LEN);
76 sm->mdie_ft_capab = ft.mdie[MOBILITY_DOMAIN_ID_LEN];
77 wpa_printf(MSG_DEBUG, "FT: Capability and Policy: 0x%02x",
80 os_memset(sm->mobility_domain, 0, MOBILITY_DOMAIN_ID_LEN);
83 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID",
84 ft.r0kh_id, ft.r0kh_id_len);
85 os_memcpy(sm->r0kh_id, ft.r0kh_id, ft.r0kh_id_len);
86 sm->r0kh_id_len = ft.r0kh_id_len;
88 /* FIX: When should R0KH-ID be cleared? We need to keep the
89 * old R0KH-ID in order to be able to use this during FT. */
91 * os_memset(sm->r0kh_id, 0, FT_R0KH_ID_LEN);
92 * sm->r0kh_id_len = 0;
97 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID",
98 ft.r1kh_id, FT_R1KH_ID_LEN);
99 os_memcpy(sm->r1kh_id, ft.r1kh_id, FT_R1KH_ID_LEN);
101 os_memset(sm->r1kh_id, 0, FT_R1KH_ID_LEN);
103 os_free(sm->assoc_resp_ies);
104 sm->assoc_resp_ies = os_malloc(ft.mdie_len + 2 + ft.ftie_len + 2);
105 if (sm->assoc_resp_ies) {
106 u8 *pos = sm->assoc_resp_ies;
108 os_memcpy(pos, ft.mdie - 2, ft.mdie_len + 2);
109 pos += ft.mdie_len + 2;
112 os_memcpy(pos, ft.ftie - 2, ft.ftie_len + 2);
113 pos += ft.ftie_len + 2;
115 sm->assoc_resp_ies_len = pos - sm->assoc_resp_ies;
116 wpa_hexdump(MSG_DEBUG, "FT: Stored MDIE and FTIE from "
117 "(Re)Association Response",
118 sm->assoc_resp_ies, sm->assoc_resp_ies_len);
126 * wpa_ft_gen_req_ies - Generate FT (IEEE 802.11r) IEs for Auth/ReAssoc Request
127 * @sm: Pointer to WPA state machine data from wpa_sm_init()
128 * @len: Buffer for returning the length of the IEs
129 * @anonce: ANonce or %NULL if not yet available
130 * @pmk_name: PMKR0Name or PMKR1Name to be added into the RSN IE PMKID List
131 * @kck: 128-bit KCK for MIC or %NULL if no MIC is used
132 * @kck_len: KCK length in octets
133 * @target_ap: Target AP address
134 * @ric_ies: Optional IE(s), e.g., WMM TSPEC(s), for RIC-Request or %NULL
135 * @ric_ies_len: Length of ric_ies buffer in octets
136 * @ap_mdie: Mobility Domain IE from the target AP
137 * Returns: Pointer to buffer with IEs or %NULL on failure
139 * Caller is responsible for freeing the returned buffer with os_free();
141 static u8 * wpa_ft_gen_req_ies(struct wpa_sm *sm, size_t *len,
142 const u8 *anonce, const u8 *pmk_name,
143 const u8 *kck, size_t kck_len,
145 const u8 *ric_ies, size_t ric_ies_len,
149 u8 *buf, *pos, *ftie_len, *ftie_pos;
150 struct rsn_mdie *mdie;
151 struct rsn_ftie *ftie;
152 struct rsn_ie_hdr *rsnie;
155 sm->ft_completed = 0;
156 sm->ft_reassoc_completed = 0;
158 buf_len = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
159 2 + sm->r0kh_id_len + ric_ies_len + 100;
160 buf = os_zalloc(buf_len);
165 /* RSNIE[PMKR0Name/PMKR1Name] */
166 rsnie = (struct rsn_ie_hdr *) pos;
167 rsnie->elem_id = WLAN_EID_RSN;
168 WPA_PUT_LE16(rsnie->version, RSN_VERSION);
169 pos = (u8 *) (rsnie + 1);
171 /* Group Suite Selector */
172 if (!wpa_cipher_valid_group(sm->group_cipher)) {
173 wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)",
178 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
180 pos += RSN_SELECTOR_LEN;
182 /* Pairwise Suite Count */
183 WPA_PUT_LE16(pos, 1);
186 /* Pairwise Suite List */
187 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
188 wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)",
189 sm->pairwise_cipher);
193 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
194 sm->pairwise_cipher));
195 pos += RSN_SELECTOR_LEN;
197 /* Authenticated Key Management Suite Count */
198 WPA_PUT_LE16(pos, 1);
201 /* Authenticated Key Management Suite List */
202 if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X)
203 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
204 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_PSK)
205 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
206 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE)
207 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
209 wpa_printf(MSG_WARNING, "FT: Invalid key management type (%d)",
214 pos += RSN_SELECTOR_LEN;
216 /* RSN Capabilities */
218 #ifdef CONFIG_IEEE80211W
219 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC)
220 capab |= WPA_CAPABILITY_MFPC;
221 #endif /* CONFIG_IEEE80211W */
222 WPA_PUT_LE16(pos, capab);
226 WPA_PUT_LE16(pos, 1);
229 /* PMKID List [PMKR0Name/PMKR1Name] */
230 os_memcpy(pos, pmk_name, WPA_PMK_NAME_LEN);
231 pos += WPA_PMK_NAME_LEN;
233 #ifdef CONFIG_IEEE80211W
234 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
235 /* Management Group Cipher Suite */
236 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
237 pos += RSN_SELECTOR_LEN;
239 #endif /* CONFIG_IEEE80211W */
241 rsnie->len = (pos - (u8 *) rsnie) - 2;
244 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
245 *pos++ = sizeof(*mdie);
246 mdie = (struct rsn_mdie *) pos;
247 pos += sizeof(*mdie);
248 os_memcpy(mdie->mobility_domain, sm->mobility_domain,
249 MOBILITY_DOMAIN_ID_LEN);
250 mdie->ft_capab = ap_mdie && ap_mdie[1] >= 3 ? ap_mdie[4] :
253 /* FTIE[SNonce, [R1KH-ID,] R0KH-ID ] */
255 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
257 ftie = (struct rsn_ftie *) pos;
258 pos += sizeof(*ftie);
259 os_memcpy(ftie->snonce, sm->snonce, WPA_NONCE_LEN);
261 os_memcpy(ftie->anonce, anonce, WPA_NONCE_LEN);
263 /* R1KH-ID sub-element in third FT message */
264 *pos++ = FTIE_SUBELEM_R1KH_ID;
265 *pos++ = FT_R1KH_ID_LEN;
266 os_memcpy(pos, sm->r1kh_id, FT_R1KH_ID_LEN);
267 pos += FT_R1KH_ID_LEN;
269 /* R0KH-ID sub-element */
270 *pos++ = FTIE_SUBELEM_R0KH_ID;
271 *pos++ = sm->r0kh_id_len;
272 os_memcpy(pos, sm->r0kh_id, sm->r0kh_id_len);
273 pos += sm->r0kh_id_len;
274 *ftie_len = pos - ftie_len - 1;
278 os_memcpy(pos, ric_ies, ric_ies_len);
284 * IEEE Std 802.11r-2008, 11A.8.4
285 * MIC shall be calculated over:
286 * non-AP STA MAC address
287 * Target AP MAC address
288 * Transaction seq number (5 for ReassocReq, 3 otherwise)
291 * FTIE (with MIC field set to 0)
292 * RIC-Request (if present)
294 /* Information element count */
295 ftie->mic_control[1] = 3 + ieee802_11_ie_count(ric_ies,
297 if (wpa_ft_mic(kck, kck_len, sm->own_addr, target_ap, 5,
298 ((u8 *) mdie) - 2, 2 + sizeof(*mdie),
299 ftie_pos, 2 + *ftie_len,
300 (u8 *) rsnie, 2 + rsnie->len, ric_ies,
301 ric_ies_len, ftie->mic) < 0) {
302 wpa_printf(MSG_INFO, "FT: Failed to calculate MIC");
314 static int wpa_ft_install_ptk(struct wpa_sm *sm, const u8 *bssid)
318 u8 null_rsc[6] = { 0, 0, 0, 0, 0, 0 };
320 wpa_printf(MSG_DEBUG, "FT: Installing PTK to the driver.");
322 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
323 wpa_printf(MSG_WARNING, "FT: Unsupported pairwise cipher %d",
324 sm->pairwise_cipher);
328 alg = wpa_cipher_to_alg(sm->pairwise_cipher);
329 keylen = wpa_cipher_key_len(sm->pairwise_cipher);
331 if (wpa_sm_set_key(sm, alg, bssid, 0, 1, null_rsc,
332 sizeof(null_rsc), (u8 *) sm->ptk.tk, keylen) < 0) {
333 wpa_printf(MSG_WARNING, "FT: Failed to set PTK to the driver");
342 * wpa_ft_prepare_auth_request - Generate over-the-air auth request
343 * @sm: Pointer to WPA state machine data from wpa_sm_init()
344 * @mdie: Target AP MDIE
345 * Returns: 0 on success, -1 on failure
347 int wpa_ft_prepare_auth_request(struct wpa_sm *sm, const u8 *mdie)
352 /* Generate a new SNonce */
353 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
354 wpa_printf(MSG_INFO, "FT: Failed to generate a new SNonce");
358 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, NULL, sm->pmk_r0_name,
359 NULL, 0, sm->bssid, NULL, 0, mdie);
361 wpa_sm_update_ft_ies(sm, sm->mobility_domain,
370 int wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
371 int ft_action, const u8 *target_ap,
372 const u8 *ric_ies, size_t ric_ies_len)
376 struct wpa_ft_ies parse;
377 struct rsn_mdie *mdie;
378 struct rsn_ftie *ftie;
379 u8 ptk_name[WPA_PMK_NAME_LEN];
383 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
384 wpa_hexdump(MSG_DEBUG, "FT: RIC IEs", ric_ies, ric_ies_len);
387 if (!sm->over_the_ds_in_progress) {
388 wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
389 "- drop FT Action Response");
393 if (os_memcmp(target_ap, sm->target_ap, ETH_ALEN) != 0) {
394 wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
395 "with this Target AP - drop FT Action "
401 if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
402 wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
403 "enabled for this connection");
407 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
408 wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
412 mdie = (struct rsn_mdie *) parse.mdie;
413 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
414 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
415 MOBILITY_DOMAIN_ID_LEN) != 0) {
416 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
420 ftie = (struct rsn_ftie *) parse.ftie;
421 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
422 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
426 if (os_memcmp(ftie->snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
427 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
428 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
429 ftie->snonce, WPA_NONCE_LEN);
430 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
431 sm->snonce, WPA_NONCE_LEN);
435 if (parse.r0kh_id == NULL) {
436 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
440 if (parse.r0kh_id_len != sm->r0kh_id_len ||
441 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
443 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
444 "the current R0KH-ID");
445 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
446 parse.r0kh_id, parse.r0kh_id_len);
447 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
448 sm->r0kh_id, sm->r0kh_id_len);
452 if (parse.r1kh_id == NULL) {
453 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
457 if (parse.rsn_pmkid == NULL ||
458 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r0_name, WPA_PMK_NAME_LEN))
460 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name (PMKID) in "
465 os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
466 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", sm->r1kh_id, FT_R1KH_ID_LEN);
467 wpa_hexdump(MSG_DEBUG, "FT: SNonce", sm->snonce, WPA_NONCE_LEN);
468 wpa_hexdump(MSG_DEBUG, "FT: ANonce", ftie->anonce, WPA_NONCE_LEN);
469 os_memcpy(sm->anonce, ftie->anonce, WPA_NONCE_LEN);
470 wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_name, sm->r1kh_id,
471 sm->own_addr, sm->pmk_r1, sm->pmk_r1_name);
472 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", sm->pmk_r1, PMK_LEN);
473 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
474 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
477 if (wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->snonce, ftie->anonce,
478 sm->own_addr, bssid, sm->pmk_r1_name, &sm->ptk,
479 ptk_name, sm->key_mgmt, sm->pairwise_cipher) < 0)
482 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, ftie->anonce,
484 sm->ptk.kck, sm->ptk.kck_len, bssid,
485 ric_ies, ric_ies_len,
486 parse.mdie ? parse.mdie - 2 : NULL);
488 wpa_sm_update_ft_ies(sm, sm->mobility_domain,
493 wpa_sm_mark_authenticated(sm, bssid);
494 ret = wpa_ft_install_ptk(sm, bssid);
497 * Some drivers do not support key configuration when we are
498 * not associated with the target AP. Work around this by
499 * trying again after the following reassociation gets
502 wpa_printf(MSG_DEBUG, "FT: Failed to set PTK prior to "
503 "association - try again after reassociation");
504 sm->set_ptk_after_assoc = 1;
506 sm->set_ptk_after_assoc = 0;
508 sm->ft_completed = 1;
511 * The caller is expected trigger re-association with the
514 os_memcpy(sm->bssid, target_ap, ETH_ALEN);
521 int wpa_ft_is_completed(struct wpa_sm *sm)
526 if (!wpa_key_mgmt_ft(sm->key_mgmt))
529 return sm->ft_completed;
533 void wpa_reset_ft_completed(struct wpa_sm *sm)
536 sm->ft_completed = 0;
540 static int wpa_ft_process_gtk_subelem(struct wpa_sm *sm, const u8 *gtk_elem,
546 size_t gtk_len, keylen, rsc_len;
548 if (gtk_elem == NULL) {
549 wpa_printf(MSG_DEBUG, "FT: No GTK included in FTIE");
553 wpa_hexdump_key(MSG_DEBUG, "FT: Received GTK in Reassoc Resp",
554 gtk_elem, gtk_elem_len);
556 if (gtk_elem_len < 11 + 24 || (gtk_elem_len - 11) % 8 ||
557 gtk_elem_len - 19 > sizeof(gtk)) {
558 wpa_printf(MSG_DEBUG, "FT: Invalid GTK sub-elem "
559 "length %lu", (unsigned long) gtk_elem_len);
562 gtk_len = gtk_elem_len - 19;
563 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, gtk_len / 8, gtk_elem + 11,
565 wpa_printf(MSG_WARNING, "FT: AES unwrap failed - could not "
570 keylen = wpa_cipher_key_len(sm->group_cipher);
571 rsc_len = wpa_cipher_rsc_len(sm->group_cipher);
572 alg = wpa_cipher_to_alg(sm->group_cipher);
573 if (alg == WPA_ALG_NONE) {
574 wpa_printf(MSG_WARNING, "WPA: Unsupported Group Cipher %d",
579 if (gtk_len < keylen) {
580 wpa_printf(MSG_DEBUG, "FT: Too short GTK in FTIE");
584 /* Key Info[2] | Key Length[1] | RSC[8] | Key[5..32]. */
586 keyidx = WPA_GET_LE16(gtk_elem) & 0x03;
588 if (gtk_elem[2] != keylen) {
589 wpa_printf(MSG_DEBUG, "FT: GTK length mismatch: received %d "
591 gtk_elem[2], (unsigned long) keylen);
595 wpa_hexdump_key(MSG_DEBUG, "FT: GTK from Reassoc Resp", gtk, keylen);
596 if (sm->group_cipher == WPA_CIPHER_TKIP) {
597 /* Swap Tx/Rx keys for Michael MIC */
599 os_memcpy(tmp, gtk + 16, 8);
600 os_memcpy(gtk + 16, gtk + 24, 8);
601 os_memcpy(gtk + 24, tmp, 8);
603 if (wpa_sm_set_key(sm, alg, broadcast_ether_addr, keyidx, 0,
604 gtk_elem + 3, rsc_len, gtk, keylen) < 0) {
605 wpa_printf(MSG_WARNING, "WPA: Failed to set GTK to the "
614 #ifdef CONFIG_IEEE80211W
615 static int wpa_ft_process_igtk_subelem(struct wpa_sm *sm, const u8 *igtk_elem,
616 size_t igtk_elem_len)
618 u8 igtk[WPA_IGTK_LEN];
621 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
624 if (igtk_elem == NULL) {
625 wpa_printf(MSG_DEBUG, "FT: No IGTK included in FTIE");
629 wpa_hexdump_key(MSG_DEBUG, "FT: Received IGTK in Reassoc Resp",
630 igtk_elem, igtk_elem_len);
632 if (igtk_elem_len != 2 + 6 + 1 + WPA_IGTK_LEN + 8) {
633 wpa_printf(MSG_DEBUG, "FT: Invalid IGTK sub-elem "
634 "length %lu", (unsigned long) igtk_elem_len);
637 if (igtk_elem[8] != WPA_IGTK_LEN) {
638 wpa_printf(MSG_DEBUG, "FT: Invalid IGTK sub-elem Key Length "
643 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, WPA_IGTK_LEN / 8,
644 igtk_elem + 9, igtk)) {
645 wpa_printf(MSG_WARNING, "FT: AES unwrap failed - could not "
650 /* KeyID[2] | IPN[6] | Key Length[1] | Key[16+8] */
652 keyidx = WPA_GET_LE16(igtk_elem);
654 wpa_hexdump_key(MSG_DEBUG, "FT: IGTK from Reassoc Resp", igtk,
656 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, keyidx, 0,
657 igtk_elem + 2, 6, igtk, WPA_IGTK_LEN) < 0) {
658 wpa_printf(MSG_WARNING, "WPA: Failed to set IGTK to the "
665 #endif /* CONFIG_IEEE80211W */
668 int wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies,
669 size_t ies_len, const u8 *src_addr)
671 struct wpa_ft_ies parse;
672 struct rsn_mdie *mdie;
673 struct rsn_ftie *ftie;
675 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
677 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
679 if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
680 wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
681 "enabled for this connection");
685 if (sm->ft_reassoc_completed) {
686 wpa_printf(MSG_DEBUG, "FT: Reassociation has already been completed for this FT protocol instance - ignore unexpected retransmission");
690 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
691 wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
695 mdie = (struct rsn_mdie *) parse.mdie;
696 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
697 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
698 MOBILITY_DOMAIN_ID_LEN) != 0) {
699 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
703 ftie = (struct rsn_ftie *) parse.ftie;
704 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
705 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
709 if (os_memcmp(ftie->snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
710 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
711 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
712 ftie->snonce, WPA_NONCE_LEN);
713 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
714 sm->snonce, WPA_NONCE_LEN);
718 if (os_memcmp(ftie->anonce, sm->anonce, WPA_NONCE_LEN) != 0) {
719 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
720 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
721 ftie->anonce, WPA_NONCE_LEN);
722 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
723 sm->anonce, WPA_NONCE_LEN);
727 if (parse.r0kh_id == NULL) {
728 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
732 if (parse.r0kh_id_len != sm->r0kh_id_len ||
733 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
735 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
736 "the current R0KH-ID");
737 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
738 parse.r0kh_id, parse.r0kh_id_len);
739 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
740 sm->r0kh_id, sm->r0kh_id_len);
744 if (parse.r1kh_id == NULL) {
745 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
749 if (os_memcmp_const(parse.r1kh_id, sm->r1kh_id, FT_R1KH_ID_LEN) != 0) {
750 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
755 if (parse.rsn_pmkid == NULL ||
756 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
758 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
759 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
765 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
766 if (ftie->mic_control[1] != count) {
767 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
768 "Control: received %u expected %u",
769 ftie->mic_control[1], count);
773 if (wpa_ft_mic(sm->ptk.kck, sm->ptk.kck_len, sm->own_addr, src_addr, 6,
774 parse.mdie - 2, parse.mdie_len + 2,
775 parse.ftie - 2, parse.ftie_len + 2,
776 parse.rsn - 2, parse.rsn_len + 2,
777 parse.ric, parse.ric_len,
779 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
783 if (os_memcmp_const(mic, ftie->mic, 16) != 0) {
784 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
785 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
786 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
790 sm->ft_reassoc_completed = 1;
792 if (wpa_ft_process_gtk_subelem(sm, parse.gtk, parse.gtk_len) < 0)
795 #ifdef CONFIG_IEEE80211W
796 if (wpa_ft_process_igtk_subelem(sm, parse.igtk, parse.igtk_len) < 0)
798 #endif /* CONFIG_IEEE80211W */
800 if (sm->set_ptk_after_assoc) {
801 wpa_printf(MSG_DEBUG, "FT: Try to set PTK again now that we "
803 if (wpa_ft_install_ptk(sm, src_addr) < 0)
805 sm->set_ptk_after_assoc = 0;
809 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Response",
810 parse.ric, parse.ric_len);
811 /* TODO: parse response and inform driver about results when
812 * using wpa_supplicant SME */
815 wpa_printf(MSG_DEBUG, "FT: Completed successfully");
822 * wpa_ft_start_over_ds - Generate over-the-DS auth request
823 * @sm: Pointer to WPA state machine data from wpa_sm_init()
824 * @target_ap: Target AP Address
825 * @mdie: Mobility Domain IE from the target AP
826 * Returns: 0 on success, -1 on failure
828 int wpa_ft_start_over_ds(struct wpa_sm *sm, const u8 *target_ap,
834 wpa_printf(MSG_DEBUG, "FT: Request over-the-DS with " MACSTR,
837 /* Generate a new SNonce */
838 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
839 wpa_printf(MSG_INFO, "FT: Failed to generate a new SNonce");
843 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, NULL, sm->pmk_r0_name,
844 NULL, 0, target_ap, NULL, 0, mdie);
846 sm->over_the_ds_in_progress = 1;
847 os_memcpy(sm->target_ap, target_ap, ETH_ALEN);
848 wpa_sm_send_ft_action(sm, 1, target_ap, ft_ies, ft_ies_len);
855 #endif /* CONFIG_IEEE80211R */