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;
157 buf_len = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
158 2 + sm->r0kh_id_len + ric_ies_len + 100;
159 buf = os_zalloc(buf_len);
164 /* RSNIE[PMKR0Name/PMKR1Name] */
165 rsnie = (struct rsn_ie_hdr *) pos;
166 rsnie->elem_id = WLAN_EID_RSN;
167 WPA_PUT_LE16(rsnie->version, RSN_VERSION);
168 pos = (u8 *) (rsnie + 1);
170 /* Group Suite Selector */
171 if (!wpa_cipher_valid_group(sm->group_cipher)) {
172 wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)",
177 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
179 pos += RSN_SELECTOR_LEN;
181 /* Pairwise Suite Count */
182 WPA_PUT_LE16(pos, 1);
185 /* Pairwise Suite List */
186 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
187 wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)",
188 sm->pairwise_cipher);
192 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
193 sm->pairwise_cipher));
194 pos += RSN_SELECTOR_LEN;
196 /* Authenticated Key Management Suite Count */
197 WPA_PUT_LE16(pos, 1);
200 /* Authenticated Key Management Suite List */
201 if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X)
202 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
203 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_PSK)
204 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
205 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE)
206 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
208 wpa_printf(MSG_WARNING, "FT: Invalid key management type (%d)",
213 pos += RSN_SELECTOR_LEN;
215 /* RSN Capabilities */
217 #ifdef CONFIG_IEEE80211W
218 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC)
219 capab |= WPA_CAPABILITY_MFPC;
220 #endif /* CONFIG_IEEE80211W */
221 WPA_PUT_LE16(pos, capab);
225 WPA_PUT_LE16(pos, 1);
228 /* PMKID List [PMKR0Name/PMKR1Name] */
229 os_memcpy(pos, pmk_name, WPA_PMK_NAME_LEN);
230 pos += WPA_PMK_NAME_LEN;
232 #ifdef CONFIG_IEEE80211W
233 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
234 /* Management Group Cipher Suite */
235 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
236 pos += RSN_SELECTOR_LEN;
238 #endif /* CONFIG_IEEE80211W */
240 rsnie->len = (pos - (u8 *) rsnie) - 2;
243 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
244 *pos++ = sizeof(*mdie);
245 mdie = (struct rsn_mdie *) pos;
246 pos += sizeof(*mdie);
247 os_memcpy(mdie->mobility_domain, sm->mobility_domain,
248 MOBILITY_DOMAIN_ID_LEN);
249 mdie->ft_capab = ap_mdie && ap_mdie[1] >= 3 ? ap_mdie[4] :
252 /* FTIE[SNonce, [R1KH-ID,] R0KH-ID ] */
254 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
256 ftie = (struct rsn_ftie *) pos;
257 pos += sizeof(*ftie);
258 os_memcpy(ftie->snonce, sm->snonce, WPA_NONCE_LEN);
260 os_memcpy(ftie->anonce, anonce, WPA_NONCE_LEN);
262 /* R1KH-ID sub-element in third FT message */
263 *pos++ = FTIE_SUBELEM_R1KH_ID;
264 *pos++ = FT_R1KH_ID_LEN;
265 os_memcpy(pos, sm->r1kh_id, FT_R1KH_ID_LEN);
266 pos += FT_R1KH_ID_LEN;
268 /* R0KH-ID sub-element */
269 *pos++ = FTIE_SUBELEM_R0KH_ID;
270 *pos++ = sm->r0kh_id_len;
271 os_memcpy(pos, sm->r0kh_id, sm->r0kh_id_len);
272 pos += sm->r0kh_id_len;
273 *ftie_len = pos - ftie_len - 1;
277 os_memcpy(pos, ric_ies, ric_ies_len);
283 * IEEE Std 802.11r-2008, 11A.8.4
284 * MIC shall be calculated over:
285 * non-AP STA MAC address
286 * Target AP MAC address
287 * Transaction seq number (5 for ReassocReq, 3 otherwise)
290 * FTIE (with MIC field set to 0)
291 * RIC-Request (if present)
293 /* Information element count */
294 ftie->mic_control[1] = 3 + ieee802_11_ie_count(ric_ies,
296 if (wpa_ft_mic(kck, kck_len, sm->own_addr, target_ap, 5,
297 ((u8 *) mdie) - 2, 2 + sizeof(*mdie),
298 ftie_pos, 2 + *ftie_len,
299 (u8 *) rsnie, 2 + rsnie->len, ric_ies,
300 ric_ies_len, ftie->mic) < 0) {
301 wpa_printf(MSG_INFO, "FT: Failed to calculate MIC");
313 static int wpa_ft_install_ptk(struct wpa_sm *sm, const u8 *bssid)
317 u8 null_rsc[6] = { 0, 0, 0, 0, 0, 0 };
319 wpa_printf(MSG_DEBUG, "FT: Installing PTK to the driver.");
321 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
322 wpa_printf(MSG_WARNING, "FT: Unsupported pairwise cipher %d",
323 sm->pairwise_cipher);
327 alg = wpa_cipher_to_alg(sm->pairwise_cipher);
328 keylen = wpa_cipher_key_len(sm->pairwise_cipher);
330 if (wpa_sm_set_key(sm, alg, bssid, 0, 1, null_rsc,
331 sizeof(null_rsc), (u8 *) sm->ptk.tk, keylen) < 0) {
332 wpa_printf(MSG_WARNING, "FT: Failed to set PTK to the driver");
341 * wpa_ft_prepare_auth_request - Generate over-the-air auth request
342 * @sm: Pointer to WPA state machine data from wpa_sm_init()
343 * @mdie: Target AP MDIE
344 * Returns: 0 on success, -1 on failure
346 int wpa_ft_prepare_auth_request(struct wpa_sm *sm, const u8 *mdie)
351 /* Generate a new SNonce */
352 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
353 wpa_printf(MSG_INFO, "FT: Failed to generate a new SNonce");
357 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, NULL, sm->pmk_r0_name,
358 NULL, 0, sm->bssid, NULL, 0, mdie);
360 wpa_sm_update_ft_ies(sm, sm->mobility_domain,
369 int wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
370 int ft_action, const u8 *target_ap,
371 const u8 *ric_ies, size_t ric_ies_len)
375 struct wpa_ft_ies parse;
376 struct rsn_mdie *mdie;
377 struct rsn_ftie *ftie;
378 u8 ptk_name[WPA_PMK_NAME_LEN];
382 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
383 wpa_hexdump(MSG_DEBUG, "FT: RIC IEs", ric_ies, ric_ies_len);
386 if (!sm->over_the_ds_in_progress) {
387 wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
388 "- drop FT Action Response");
392 if (os_memcmp(target_ap, sm->target_ap, ETH_ALEN) != 0) {
393 wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
394 "with this Target AP - drop FT Action "
400 if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
401 wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
402 "enabled for this connection");
406 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
407 wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
411 mdie = (struct rsn_mdie *) parse.mdie;
412 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
413 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
414 MOBILITY_DOMAIN_ID_LEN) != 0) {
415 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
419 ftie = (struct rsn_ftie *) parse.ftie;
420 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
421 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
425 if (os_memcmp(ftie->snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
426 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
427 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
428 ftie->snonce, WPA_NONCE_LEN);
429 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
430 sm->snonce, WPA_NONCE_LEN);
434 if (parse.r0kh_id == NULL) {
435 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
439 if (parse.r0kh_id_len != sm->r0kh_id_len ||
440 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
442 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
443 "the current R0KH-ID");
444 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
445 parse.r0kh_id, parse.r0kh_id_len);
446 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
447 sm->r0kh_id, sm->r0kh_id_len);
451 if (parse.r1kh_id == NULL) {
452 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
456 if (parse.rsn_pmkid == NULL ||
457 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r0_name, WPA_PMK_NAME_LEN))
459 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name (PMKID) in "
464 os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
465 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", sm->r1kh_id, FT_R1KH_ID_LEN);
466 wpa_hexdump(MSG_DEBUG, "FT: SNonce", sm->snonce, WPA_NONCE_LEN);
467 wpa_hexdump(MSG_DEBUG, "FT: ANonce", ftie->anonce, WPA_NONCE_LEN);
468 os_memcpy(sm->anonce, ftie->anonce, WPA_NONCE_LEN);
469 wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_name, sm->r1kh_id,
470 sm->own_addr, sm->pmk_r1, sm->pmk_r1_name);
471 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", sm->pmk_r1, PMK_LEN);
472 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
473 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
476 if (wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->snonce, ftie->anonce,
477 sm->own_addr, bssid, sm->pmk_r1_name, &sm->ptk,
478 ptk_name, sm->key_mgmt, sm->pairwise_cipher) < 0)
481 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, ftie->anonce,
483 sm->ptk.kck, sm->ptk.kck_len, bssid,
484 ric_ies, ric_ies_len,
485 parse.mdie ? parse.mdie - 2 : NULL);
487 wpa_sm_update_ft_ies(sm, sm->mobility_domain,
492 wpa_sm_mark_authenticated(sm, bssid);
493 ret = wpa_ft_install_ptk(sm, bssid);
496 * Some drivers do not support key configuration when we are
497 * not associated with the target AP. Work around this by
498 * trying again after the following reassociation gets
501 wpa_printf(MSG_DEBUG, "FT: Failed to set PTK prior to "
502 "association - try again after reassociation");
503 sm->set_ptk_after_assoc = 1;
505 sm->set_ptk_after_assoc = 0;
507 sm->ft_completed = 1;
510 * The caller is expected trigger re-association with the
513 os_memcpy(sm->bssid, target_ap, ETH_ALEN);
520 int wpa_ft_is_completed(struct wpa_sm *sm)
525 if (!wpa_key_mgmt_ft(sm->key_mgmt))
528 return sm->ft_completed;
532 void wpa_reset_ft_completed(struct wpa_sm *sm)
535 sm->ft_completed = 0;
539 static int wpa_ft_process_gtk_subelem(struct wpa_sm *sm, const u8 *gtk_elem,
545 size_t gtk_len, keylen, rsc_len;
547 if (gtk_elem == NULL) {
548 wpa_printf(MSG_DEBUG, "FT: No GTK included in FTIE");
552 wpa_hexdump_key(MSG_DEBUG, "FT: Received GTK in Reassoc Resp",
553 gtk_elem, gtk_elem_len);
555 if (gtk_elem_len < 11 + 24 || (gtk_elem_len - 11) % 8 ||
556 gtk_elem_len - 19 > sizeof(gtk)) {
557 wpa_printf(MSG_DEBUG, "FT: Invalid GTK sub-elem "
558 "length %lu", (unsigned long) gtk_elem_len);
561 gtk_len = gtk_elem_len - 19;
562 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, gtk_len / 8, gtk_elem + 11,
564 wpa_printf(MSG_WARNING, "FT: AES unwrap failed - could not "
569 keylen = wpa_cipher_key_len(sm->group_cipher);
570 rsc_len = wpa_cipher_rsc_len(sm->group_cipher);
571 alg = wpa_cipher_to_alg(sm->group_cipher);
572 if (alg == WPA_ALG_NONE) {
573 wpa_printf(MSG_WARNING, "WPA: Unsupported Group Cipher %d",
578 if (gtk_len < keylen) {
579 wpa_printf(MSG_DEBUG, "FT: Too short GTK in FTIE");
583 /* Key Info[2] | Key Length[1] | RSC[8] | Key[5..32]. */
585 keyidx = WPA_GET_LE16(gtk_elem) & 0x03;
587 if (gtk_elem[2] != keylen) {
588 wpa_printf(MSG_DEBUG, "FT: GTK length mismatch: received %d "
590 gtk_elem[2], (unsigned long) keylen);
594 wpa_hexdump_key(MSG_DEBUG, "FT: GTK from Reassoc Resp", gtk, keylen);
595 if (sm->group_cipher == WPA_CIPHER_TKIP) {
596 /* Swap Tx/Rx keys for Michael MIC */
598 os_memcpy(tmp, gtk + 16, 8);
599 os_memcpy(gtk + 16, gtk + 24, 8);
600 os_memcpy(gtk + 24, tmp, 8);
602 if (wpa_sm_set_key(sm, alg, broadcast_ether_addr, keyidx, 0,
603 gtk_elem + 3, rsc_len, gtk, keylen) < 0) {
604 wpa_printf(MSG_WARNING, "WPA: Failed to set GTK to the "
613 #ifdef CONFIG_IEEE80211W
614 static int wpa_ft_process_igtk_subelem(struct wpa_sm *sm, const u8 *igtk_elem,
615 size_t igtk_elem_len)
617 u8 igtk[WPA_IGTK_LEN];
620 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
623 if (igtk_elem == NULL) {
624 wpa_printf(MSG_DEBUG, "FT: No IGTK included in FTIE");
628 wpa_hexdump_key(MSG_DEBUG, "FT: Received IGTK in Reassoc Resp",
629 igtk_elem, igtk_elem_len);
631 if (igtk_elem_len != 2 + 6 + 1 + WPA_IGTK_LEN + 8) {
632 wpa_printf(MSG_DEBUG, "FT: Invalid IGTK sub-elem "
633 "length %lu", (unsigned long) igtk_elem_len);
636 if (igtk_elem[8] != WPA_IGTK_LEN) {
637 wpa_printf(MSG_DEBUG, "FT: Invalid IGTK sub-elem Key Length "
642 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, WPA_IGTK_LEN / 8,
643 igtk_elem + 9, igtk)) {
644 wpa_printf(MSG_WARNING, "FT: AES unwrap failed - could not "
649 /* KeyID[2] | IPN[6] | Key Length[1] | Key[16+8] */
651 keyidx = WPA_GET_LE16(igtk_elem);
653 wpa_hexdump_key(MSG_DEBUG, "FT: IGTK from Reassoc Resp", igtk,
655 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, keyidx, 0,
656 igtk_elem + 2, 6, igtk, WPA_IGTK_LEN) < 0) {
657 wpa_printf(MSG_WARNING, "WPA: Failed to set IGTK to the "
664 #endif /* CONFIG_IEEE80211W */
667 int wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies,
668 size_t ies_len, const u8 *src_addr)
670 struct wpa_ft_ies parse;
671 struct rsn_mdie *mdie;
672 struct rsn_ftie *ftie;
674 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
676 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
678 if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
679 wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
680 "enabled for this connection");
684 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
685 wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
689 mdie = (struct rsn_mdie *) parse.mdie;
690 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
691 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
692 MOBILITY_DOMAIN_ID_LEN) != 0) {
693 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
697 ftie = (struct rsn_ftie *) parse.ftie;
698 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
699 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
703 if (os_memcmp(ftie->snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
704 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
705 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
706 ftie->snonce, WPA_NONCE_LEN);
707 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
708 sm->snonce, WPA_NONCE_LEN);
712 if (os_memcmp(ftie->anonce, sm->anonce, WPA_NONCE_LEN) != 0) {
713 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
714 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
715 ftie->anonce, WPA_NONCE_LEN);
716 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
717 sm->anonce, WPA_NONCE_LEN);
721 if (parse.r0kh_id == NULL) {
722 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
726 if (parse.r0kh_id_len != sm->r0kh_id_len ||
727 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
729 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
730 "the current R0KH-ID");
731 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
732 parse.r0kh_id, parse.r0kh_id_len);
733 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
734 sm->r0kh_id, sm->r0kh_id_len);
738 if (parse.r1kh_id == NULL) {
739 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
743 if (os_memcmp_const(parse.r1kh_id, sm->r1kh_id, FT_R1KH_ID_LEN) != 0) {
744 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
749 if (parse.rsn_pmkid == NULL ||
750 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
752 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
753 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
759 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
760 if (ftie->mic_control[1] != count) {
761 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
762 "Control: received %u expected %u",
763 ftie->mic_control[1], count);
767 if (wpa_ft_mic(sm->ptk.kck, sm->ptk.kck_len, sm->own_addr, src_addr, 6,
768 parse.mdie - 2, parse.mdie_len + 2,
769 parse.ftie - 2, parse.ftie_len + 2,
770 parse.rsn - 2, parse.rsn_len + 2,
771 parse.ric, parse.ric_len,
773 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
777 if (os_memcmp_const(mic, ftie->mic, 16) != 0) {
778 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
779 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
780 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
784 if (wpa_ft_process_gtk_subelem(sm, parse.gtk, parse.gtk_len) < 0)
787 #ifdef CONFIG_IEEE80211W
788 if (wpa_ft_process_igtk_subelem(sm, parse.igtk, parse.igtk_len) < 0)
790 #endif /* CONFIG_IEEE80211W */
792 if (sm->set_ptk_after_assoc) {
793 wpa_printf(MSG_DEBUG, "FT: Try to set PTK again now that we "
795 if (wpa_ft_install_ptk(sm, src_addr) < 0)
797 sm->set_ptk_after_assoc = 0;
801 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Response",
802 parse.ric, parse.ric_len);
803 /* TODO: parse response and inform driver about results when
804 * using wpa_supplicant SME */
807 wpa_printf(MSG_DEBUG, "FT: Completed successfully");
814 * wpa_ft_start_over_ds - Generate over-the-DS auth request
815 * @sm: Pointer to WPA state machine data from wpa_sm_init()
816 * @target_ap: Target AP Address
817 * @mdie: Mobility Domain IE from the target AP
818 * Returns: 0 on success, -1 on failure
820 int wpa_ft_start_over_ds(struct wpa_sm *sm, const u8 *target_ap,
826 wpa_printf(MSG_DEBUG, "FT: Request over-the-DS with " MACSTR,
829 /* Generate a new SNonce */
830 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
831 wpa_printf(MSG_INFO, "FT: Failed to generate a new SNonce");
835 ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, NULL, sm->pmk_r0_name,
836 NULL, 0, target_ap, NULL, 0, mdie);
838 sm->over_the_ds_in_progress = 1;
839 os_memcpy(sm->target_ap, target_ap, ETH_ALEN);
840 wpa_sm_send_ft_action(sm, 1, target_ap, ft_ies, ft_ies_len);
847 #endif /* CONFIG_IEEE80211R */