2 * WPA Supplicant - Mesh RSN routines
3 * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "crypto/sha256.h"
14 #include "crypto/random.h"
15 #include "crypto/aes.h"
16 #include "crypto/aes_siv.h"
17 #include "rsn_supp/wpa.h"
18 #include "ap/hostapd.h"
19 #include "ap/wpa_auth.h"
20 #include "ap/sta_info.h"
21 #include "ap/ieee802_11.h"
22 #include "wpa_supplicant_i.h"
24 #include "wpas_glue.h"
28 #define MESH_AUTH_TIMEOUT 10
29 #define MESH_AUTH_RETRY 3
31 void mesh_auth_timer(void *eloop_ctx, void *user_data)
33 struct wpa_supplicant *wpa_s = eloop_ctx;
34 struct sta_info *sta = user_data;
35 struct hostapd_data *hapd;
37 if (sta->sae->state != SAE_ACCEPTED) {
38 wpa_printf(MSG_DEBUG, "AUTH: Re-authenticate with " MACSTR
40 MAC2STR(sta->addr), sta->sae_auth_retry);
41 wpa_msg(wpa_s, MSG_INFO, MESH_SAE_AUTH_FAILURE "addr=" MACSTR,
43 if (sta->sae_auth_retry < MESH_AUTH_RETRY) {
44 mesh_rsn_auth_sae_sta(wpa_s, sta);
46 hapd = wpa_s->ifmsh->bss[0];
48 if (sta->sae_auth_retry > MESH_AUTH_RETRY) {
49 ap_free_sta(hapd, sta);
53 /* block the STA if exceeded the number of attempts */
54 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_BLOCKED);
55 sta->sae->state = SAE_NOTHING;
56 wpa_msg(wpa_s, MSG_INFO, MESH_SAE_AUTH_BLOCKED "addr="
57 MACSTR " duration=%d",
59 hapd->conf->ap_max_inactivity);
61 sta->sae_auth_retry++;
66 static void auth_logger(void *ctx, const u8 *addr, logger_level level,
70 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
73 wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
77 static const u8 *auth_get_psk(void *ctx, const u8 *addr,
78 const u8 *p2p_dev_addr, const u8 *prev_psk,
81 struct mesh_rsn *mesh_rsn = ctx;
82 struct hostapd_data *hapd = mesh_rsn->wpa_s->ifmsh->bss[0];
83 struct sta_info *sta = ap_get_sta(hapd, addr);
87 wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
88 __func__, MAC2STR(addr), prev_psk);
90 if (sta && sta->auth_alg == WLAN_AUTH_SAE) {
91 if (!sta->sae || prev_psk)
100 static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
101 const u8 *addr, int idx, u8 *key, size_t key_len)
103 struct mesh_rsn *mesh_rsn = ctx;
106 os_memset(seq, 0, sizeof(seq));
109 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
111 __func__, alg, MAC2STR(addr), idx);
113 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
116 wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
118 return wpa_drv_set_key(mesh_rsn->wpa_s, alg, addr, idx,
119 1, seq, 6, key, key_len);
123 static int auth_start_ampe(void *ctx, const u8 *addr)
125 struct mesh_rsn *mesh_rsn = ctx;
126 struct hostapd_data *hapd;
127 struct sta_info *sta;
129 if (mesh_rsn->wpa_s->current_ssid->mode != WPAS_MODE_MESH)
132 hapd = mesh_rsn->wpa_s->ifmsh->bss[0];
133 sta = ap_get_sta(hapd, addr);
135 eloop_cancel_timeout(mesh_auth_timer, mesh_rsn->wpa_s, sta);
137 mesh_mpm_auth_peer(mesh_rsn->wpa_s, addr);
142 static int __mesh_rsn_auth_init(struct mesh_rsn *rsn, const u8 *addr,
143 enum mfp_options ieee80211w)
145 struct wpa_auth_config conf;
146 static const struct wpa_auth_callbacks cb = {
147 .logger = auth_logger,
148 .get_psk = auth_get_psk,
149 .set_key = auth_set_key,
150 .start_ampe = auth_start_ampe,
154 wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
156 os_memset(&conf, 0, sizeof(conf));
157 conf.wpa = WPA_PROTO_RSN;
158 conf.wpa_key_mgmt = WPA_KEY_MGMT_SAE;
159 conf.wpa_pairwise = rsn->pairwise_cipher;
160 conf.rsn_pairwise = rsn->pairwise_cipher;
161 conf.wpa_group = rsn->group_cipher;
162 conf.eapol_version = 0;
163 conf.wpa_group_rekey = -1;
164 conf.wpa_group_update_count = 4;
165 conf.wpa_pairwise_update_count = 4;
166 #ifdef CONFIG_IEEE80211W
167 conf.ieee80211w = ieee80211w;
168 if (ieee80211w != NO_MGMT_FRAME_PROTECTION)
169 conf.group_mgmt_cipher = rsn->mgmt_group_cipher;
170 #endif /* CONFIG_IEEE80211W */
172 rsn->auth = wpa_init(addr, &conf, &cb, rsn);
173 if (rsn->auth == NULL) {
174 wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
178 /* TODO: support rekeying */
179 rsn->mgtk_len = wpa_cipher_key_len(conf.wpa_group);
180 if (random_get_bytes(rsn->mgtk, rsn->mgtk_len) < 0)
182 rsn->mgtk_key_id = 1;
184 #ifdef CONFIG_IEEE80211W
185 if (ieee80211w != NO_MGMT_FRAME_PROTECTION) {
186 rsn->igtk_len = wpa_cipher_key_len(conf.group_mgmt_cipher);
187 if (random_get_bytes(rsn->igtk, rsn->igtk_len) < 0)
189 rsn->igtk_key_id = 4;
192 wpa_hexdump_key(MSG_DEBUG, "mesh: Own TX IGTK",
193 rsn->igtk, rsn->igtk_len);
194 wpa_drv_set_key(rsn->wpa_s,
195 wpa_cipher_to_alg(rsn->mgmt_group_cipher), NULL,
197 seq, sizeof(seq), rsn->igtk, rsn->igtk_len);
199 #endif /* CONFIG_IEEE80211W */
201 /* group privacy / data frames */
202 wpa_hexdump_key(MSG_DEBUG, "mesh: Own TX MGTK",
203 rsn->mgtk, rsn->mgtk_len);
204 wpa_drv_set_key(rsn->wpa_s, wpa_cipher_to_alg(rsn->group_cipher), NULL,
205 rsn->mgtk_key_id, 1, seq, sizeof(seq),
206 rsn->mgtk, rsn->mgtk_len);
212 static void mesh_rsn_deinit(struct mesh_rsn *rsn)
214 os_memset(rsn->mgtk, 0, sizeof(rsn->mgtk));
216 os_memset(rsn->igtk, 0, sizeof(rsn->igtk));
219 wpa_deinit(rsn->auth);
223 struct mesh_rsn *mesh_rsn_auth_init(struct wpa_supplicant *wpa_s,
224 struct mesh_conf *conf)
226 struct mesh_rsn *mesh_rsn;
227 struct hostapd_data *bss = wpa_s->ifmsh->bss[0];
230 #ifdef CONFIG_PMKSA_CACHE_EXTERNAL
231 struct external_pmksa_cache *entry;
232 #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
234 mesh_rsn = os_zalloc(sizeof(*mesh_rsn));
235 if (mesh_rsn == NULL)
237 mesh_rsn->wpa_s = wpa_s;
238 mesh_rsn->pairwise_cipher = conf->pairwise_cipher;
239 mesh_rsn->group_cipher = conf->group_cipher;
240 mesh_rsn->mgmt_group_cipher = conf->mgmt_group_cipher;
242 if (__mesh_rsn_auth_init(mesh_rsn, wpa_s->own_addr,
243 conf->ieee80211w) < 0) {
244 mesh_rsn_deinit(mesh_rsn);
249 bss->wpa_auth = mesh_rsn->auth;
251 #ifdef CONFIG_PMKSA_CACHE_EXTERNAL
252 while ((entry = dl_list_last(&wpa_s->mesh_external_pmksa_cache,
253 struct external_pmksa_cache,
257 ret = wpa_auth_pmksa_add_entry(bss->wpa_auth,
259 dl_list_del(&entry->list);
265 #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
267 ie = wpa_auth_get_wpa_ie(mesh_rsn->auth, &ie_len);
268 conf->rsn_ie = (u8 *) ie;
269 conf->rsn_ie_len = ie_len;
271 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
277 static int index_within_array(const int *array, int idx)
281 for (i = 0; i < idx; i++) {
290 static int mesh_rsn_sae_group(struct wpa_supplicant *wpa_s,
291 struct sae_data *sae)
293 int *groups = wpa_s->ifmsh->bss[0]->conf->sae_groups;
295 /* Configuration may have changed, so validate current index */
296 if (!index_within_array(groups, wpa_s->mesh_rsn->sae_group_index))
300 int group = groups[wpa_s->mesh_rsn->sae_group_index];
304 if (sae_set_group(sae, group) == 0) {
305 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
309 wpa_s->mesh_rsn->sae_group_index++;
316 static int mesh_rsn_build_sae_commit(struct wpa_supplicant *wpa_s,
317 struct wpa_ssid *ssid,
318 struct sta_info *sta)
320 const char *password;
322 password = ssid->sae_password;
324 password = ssid->passphrase;
326 wpa_msg(wpa_s, MSG_DEBUG, "SAE: No password available");
330 if (mesh_rsn_sae_group(wpa_s, sta->sae) < 0) {
331 wpa_msg(wpa_s, MSG_DEBUG, "SAE: Failed to select group");
335 if (sta->sae->tmp && !sta->sae->tmp->pw_id && ssid->sae_password_id) {
336 sta->sae->tmp->pw_id = os_strdup(ssid->sae_password_id);
337 if (!sta->sae->tmp->pw_id)
340 return sae_prepare_commit(wpa_s->own_addr, sta->addr,
341 (u8 *) password, os_strlen(password),
342 ssid->sae_password_id,
347 /* initiate new SAE authentication with sta */
348 int mesh_rsn_auth_sae_sta(struct wpa_supplicant *wpa_s,
349 struct sta_info *sta)
351 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
352 struct wpa_ssid *ssid = wpa_s->current_ssid;
353 struct rsn_pmksa_cache_entry *pmksa;
358 wpa_msg(wpa_s, MSG_DEBUG,
359 "AUTH: No current_ssid known to initiate new SAE");
364 sta->sae = os_zalloc(sizeof(*sta->sae));
365 if (sta->sae == NULL)
369 pmksa = wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr, NULL);
372 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
375 wpa_printf(MSG_ERROR,
376 "mesh: Failed to initialize RSN state machine");
380 wpa_printf(MSG_DEBUG,
381 "AUTH: Mesh PMKSA cache entry found for " MACSTR
382 " - try to use PMKSA caching instead of new SAE authentication",
384 wpa_auth_pmksa_set_to_sm(pmksa, sta->wpa_sm, hapd->wpa_auth,
385 sta->sae->pmkid, sta->sae->pmk);
386 sae_accept_sta(hapd, sta);
387 sta->mesh_sae_pmksa_caching = 1;
390 sta->mesh_sae_pmksa_caching = 0;
392 if (mesh_rsn_build_sae_commit(wpa_s, ssid, sta))
395 wpa_msg(wpa_s, MSG_DEBUG,
396 "AUTH: started authentication with SAE peer: " MACSTR,
399 ret = auth_sae_init_committed(hapd, sta);
403 eloop_cancel_timeout(mesh_auth_timer, wpa_s, sta);
404 rnd = rand() % MESH_AUTH_TIMEOUT;
405 eloop_register_timeout(MESH_AUTH_TIMEOUT + rnd, 0, mesh_auth_timer,
411 void mesh_rsn_get_pmkid(struct mesh_rsn *rsn, struct sta_info *sta, u8 *pmkid)
413 os_memcpy(pmkid, sta->sae->pmkid, SAE_PMKID_LEN);
418 mesh_rsn_derive_aek(struct mesh_rsn *rsn, struct sta_info *sta)
420 u8 *myaddr = rsn->wpa_s->own_addr;
421 u8 *peer = sta->addr;
423 u8 context[RSN_SELECTOR_LEN + 2 * ETH_ALEN], *ptr = context;
426 * AEK = KDF-Hash-256(PMK, "AEK Derivation", Selected AKM Suite ||
427 * min(localMAC, peerMAC) || max(localMAC, peerMAC))
429 /* Selected AKM Suite: SAE */
430 RSN_SELECTOR_PUT(ptr, RSN_AUTH_KEY_MGMT_SAE);
431 ptr += RSN_SELECTOR_LEN;
433 if (os_memcmp(myaddr, peer, ETH_ALEN) < 0) {
440 os_memcpy(ptr, addr1, ETH_ALEN);
442 os_memcpy(ptr, addr2, ETH_ALEN);
444 sha256_prf(sta->sae->pmk, sizeof(sta->sae->pmk), "AEK Derivation",
445 context, sizeof(context), sta->aek, sizeof(sta->aek));
449 /* derive mesh temporal key from pmk */
450 int mesh_rsn_derive_mtk(struct wpa_supplicant *wpa_s, struct sta_info *sta)
454 u8 *myaddr = wpa_s->own_addr;
455 u8 *peer = sta->addr;
456 u8 context[2 * WPA_NONCE_LEN + 2 * 2 + RSN_SELECTOR_LEN + 2 * ETH_ALEN];
459 * MTK = KDF-Hash-Length(PMK, "Temporal Key Derivation", min(localNonce,
460 * peerNonce) || max(localNonce, peerNonce) || min(localLinkID,
461 * peerLinkID) || max(localLinkID, peerLinkID) || Selected AKM Suite ||
462 * min(localMAC, peerMAC) || max(localMAC, peerMAC))
465 if (os_memcmp(sta->my_nonce, sta->peer_nonce, WPA_NONCE_LEN) < 0) {
467 max = sta->peer_nonce;
469 min = sta->peer_nonce;
472 os_memcpy(ptr, min, WPA_NONCE_LEN);
473 ptr += WPA_NONCE_LEN;
474 os_memcpy(ptr, max, WPA_NONCE_LEN);
475 ptr += WPA_NONCE_LEN;
477 if (sta->my_lid < sta->peer_lid) {
478 WPA_PUT_LE16(ptr, sta->my_lid);
480 WPA_PUT_LE16(ptr, sta->peer_lid);
483 WPA_PUT_LE16(ptr, sta->peer_lid);
485 WPA_PUT_LE16(ptr, sta->my_lid);
489 /* Selected AKM Suite: SAE */
490 RSN_SELECTOR_PUT(ptr, RSN_AUTH_KEY_MGMT_SAE);
491 ptr += RSN_SELECTOR_LEN;
493 if (os_memcmp(myaddr, peer, ETH_ALEN) < 0) {
500 os_memcpy(ptr, min, ETH_ALEN);
502 os_memcpy(ptr, max, ETH_ALEN);
504 sta->mtk_len = wpa_cipher_key_len(wpa_s->mesh_rsn->pairwise_cipher);
505 sha256_prf(sta->sae->pmk, SAE_PMK_LEN,
506 "Temporal Key Derivation", context, sizeof(context),
507 sta->mtk, sta->mtk_len);
512 void mesh_rsn_init_ampe_sta(struct wpa_supplicant *wpa_s, struct sta_info *sta)
514 if (random_get_bytes(sta->my_nonce, WPA_NONCE_LEN) < 0) {
515 wpa_printf(MSG_INFO, "mesh: Failed to derive random nonce");
516 /* TODO: How to handle this more cleanly? */
518 os_memset(sta->peer_nonce, 0, WPA_NONCE_LEN);
519 mesh_rsn_derive_aek(wpa_s->mesh_rsn, sta);
523 /* insert AMPE and encrypted MIC at @ie.
524 * @mesh_rsn: mesh RSN context
525 * @sta: STA we're sending to
526 * @cat: pointer to category code in frame header.
527 * @buf: wpabuf to add encrypted AMPE and MIC to.
529 int mesh_rsn_protect_frame(struct mesh_rsn *rsn, struct sta_info *sta,
530 const u8 *cat, struct wpabuf *buf)
532 struct ieee80211_ampe_ie *ampe;
533 u8 const *ie = wpabuf_head_u8(buf) + wpabuf_len(buf);
534 u8 *ampe_ie, *pos, *mic_payload;
535 const u8 *aad[] = { rsn->wpa_s->own_addr, sta->addr, cat };
536 const size_t aad_len[] = { ETH_ALEN, ETH_ALEN, ie - cat };
541 if (cat[1] == PLINK_OPEN)
542 len += rsn->mgtk_len + WPA_KEY_RSC_LEN + 4;
543 #ifdef CONFIG_IEEE80211W
544 if (cat[1] == PLINK_OPEN && rsn->igtk_len)
545 len += 2 + 6 + rsn->igtk_len;
546 #endif /* CONFIG_IEEE80211W */
548 if (2 + AES_BLOCK_SIZE + 2 + len > wpabuf_tailroom(buf)) {
549 wpa_printf(MSG_ERROR, "protect frame: buffer too small");
553 ampe_ie = os_zalloc(2 + len);
555 wpa_printf(MSG_ERROR, "protect frame: out of memory");
560 ampe_ie[0] = WLAN_EID_AMPE;
562 ampe = (struct ieee80211_ampe_ie *) (ampe_ie + 2);
564 RSN_SELECTOR_PUT(ampe->selected_pairwise_suite,
565 RSN_CIPHER_SUITE_CCMP);
566 os_memcpy(ampe->local_nonce, sta->my_nonce, WPA_NONCE_LEN);
567 os_memcpy(ampe->peer_nonce, sta->peer_nonce, WPA_NONCE_LEN);
569 pos = (u8 *) (ampe + 1);
570 if (cat[1] != PLINK_OPEN)
573 /* TODO: Key Replay Counter[8] optionally for
574 * Mesh Group Key Inform/Acknowledge frames */
576 /* TODO: static mgtk for now since we don't support rekeying! */
579 * MGTK[variable] || Key RSC[8] || GTKExpirationTime[4]
581 os_memcpy(pos, rsn->mgtk, rsn->mgtk_len);
582 pos += rsn->mgtk_len;
583 wpa_drv_get_seqnum(rsn->wpa_s, NULL, rsn->mgtk_key_id, pos);
584 pos += WPA_KEY_RSC_LEN;
585 /* Use fixed GTKExpirationTime for now */
586 WPA_PUT_LE32(pos, 0xffffffff);
589 #ifdef CONFIG_IEEE80211W
591 * IGTKdata[variable]:
592 * Key ID[2], IPN[6], IGTK[variable]
595 WPA_PUT_LE16(pos, rsn->igtk_key_id);
597 wpa_drv_get_seqnum(rsn->wpa_s, NULL, rsn->igtk_key_id, pos);
599 os_memcpy(pos, rsn->igtk, rsn->igtk_len);
601 #endif /* CONFIG_IEEE80211W */
604 wpa_hexdump_key(MSG_DEBUG, "mesh: Plaintext AMPE element",
608 wpabuf_put_u8(buf, WLAN_EID_MIC);
609 wpabuf_put_u8(buf, AES_BLOCK_SIZE);
610 /* MIC field is output ciphertext */
612 /* encrypt after MIC */
613 mic_payload = wpabuf_put(buf, 2 + len + AES_BLOCK_SIZE);
615 if (aes_siv_encrypt(sta->aek, sizeof(sta->aek), ampe_ie, 2 + len, 3,
616 aad, aad_len, mic_payload)) {
617 wpa_printf(MSG_ERROR, "protect frame: failed to encrypt");
627 int mesh_rsn_process_ampe(struct wpa_supplicant *wpa_s, struct sta_info *sta,
628 struct ieee802_11_elems *elems, const u8 *cat,
629 const u8 *chosen_pmk,
630 const u8 *start, size_t elems_len)
633 struct ieee80211_ampe_ie *ampe;
634 u8 null_nonce[WPA_NONCE_LEN] = {};
637 u8 *ampe_buf, *crypt = NULL, *pos, *end;
639 const u8 *aad[] = { sta->addr, wpa_s->own_addr, cat };
640 const size_t aad_len[] = { ETH_ALEN, ETH_ALEN,
641 (elems->mic - 2) - cat };
645 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
647 if (!wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr, NULL)) {
649 "Mesh RSN: SAE is not prepared yet");
652 mesh_rsn_auth_sae_sta(wpa_s, sta);
655 if (chosen_pmk && os_memcmp(chosen_pmk, sta->sae->pmkid, PMKID_LEN)) {
656 wpa_msg(wpa_s, MSG_DEBUG,
657 "Mesh RSN: Invalid PMKID (Chosen PMK did not match calculated PMKID)");
661 if (!elems->mic || elems->mic_len < AES_BLOCK_SIZE) {
662 wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: missing mic ie");
666 ampe_buf = (u8 *) elems->mic + elems->mic_len;
667 if ((int) elems_len < ampe_buf - start)
670 crypt_len = elems_len - (elems->mic - start);
671 if (crypt_len < 2 + AES_BLOCK_SIZE) {
672 wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: missing ampe ie");
676 /* crypt is modified by siv_decrypt */
677 crypt = os_zalloc(crypt_len);
679 wpa_printf(MSG_ERROR, "Mesh RSN: out of memory");
684 os_memcpy(crypt, elems->mic, crypt_len);
686 if (aes_siv_decrypt(sta->aek, sizeof(sta->aek), crypt, crypt_len, 3,
687 aad, aad_len, ampe_buf)) {
688 wpa_printf(MSG_ERROR, "Mesh RSN: frame verification failed!");
693 crypt_len -= AES_BLOCK_SIZE;
694 wpa_hexdump_key(MSG_DEBUG, "mesh: Decrypted AMPE element",
695 ampe_buf, crypt_len);
697 ampe_eid = *ampe_buf++;
698 ampe_ie_len = *ampe_buf++;
700 if (ampe_eid != WLAN_EID_AMPE ||
701 (size_t) 2 + ampe_ie_len > crypt_len ||
702 ampe_ie_len < sizeof(struct ieee80211_ampe_ie)) {
703 wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: invalid ampe ie");
708 ampe = (struct ieee80211_ampe_ie *) ampe_buf;
709 pos = (u8 *) (ampe + 1);
710 end = ampe_buf + ampe_ie_len;
711 if (os_memcmp(ampe->peer_nonce, null_nonce, WPA_NONCE_LEN) != 0 &&
712 os_memcmp(ampe->peer_nonce, sta->my_nonce, WPA_NONCE_LEN) != 0) {
713 wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: invalid peer nonce");
717 os_memcpy(sta->peer_nonce, ampe->local_nonce,
718 sizeof(ampe->local_nonce));
720 /* TODO: Key Replay Counter[8] in Mesh Group Key Inform/Acknowledge
724 * GTKdata shall not be included in Mesh Peering Confirm. While the
725 * standard does not state the same about IGTKdata, that same constraint
726 * needs to apply for it. It makes no sense to include the keys in Mesh
727 * Peering Close frames either, so while the standard does not seem to
728 * have a shall statement for these, they are described without
729 * mentioning GTKdata.
731 * An earlier implementation used to add GTKdata to both Mesh Peering
732 * Open and Mesh Peering Confirm frames, so ignore the possibly present
733 * GTKdata frame without rejecting the frame as a backwards
734 * compatibility mechanism.
736 if (cat[1] != PLINK_OPEN) {
738 wpa_hexdump_key(MSG_DEBUG,
739 "mesh: Ignore unexpected GTKdata(etc.) fields in the end of AMPE element in Mesh Peering Confirm/Close",
747 * MGTK[variable] || Key RSC[8] || GTKExpirationTime[4]
749 sta->mgtk_key_id = 1; /* FIX: Where to get Key ID? */
750 key_len = wpa_cipher_key_len(wpa_s->mesh_rsn->group_cipher);
751 if ((int) key_len + WPA_KEY_RSC_LEN + 4 > end - pos) {
752 wpa_dbg(wpa_s, MSG_DEBUG, "mesh: Truncated AMPE element");
756 sta->mgtk_len = key_len;
757 os_memcpy(sta->mgtk, pos, sta->mgtk_len);
758 wpa_hexdump_key(MSG_DEBUG, "mesh: GTKdata - MGTK",
759 sta->mgtk, sta->mgtk_len);
760 pos += sta->mgtk_len;
761 wpa_hexdump(MSG_DEBUG, "mesh: GTKdata - MGTK - Key RSC",
762 pos, WPA_KEY_RSC_LEN);
763 os_memcpy(sta->mgtk_rsc, pos, sizeof(sta->mgtk_rsc));
764 pos += WPA_KEY_RSC_LEN;
765 wpa_printf(MSG_DEBUG,
766 "mesh: GTKdata - MGTK - GTKExpirationTime: %u seconds",
770 #ifdef CONFIG_IEEE80211W
772 * IGTKdata[variable]:
773 * Key ID[2], IPN[6], IGTK[variable]
775 key_len = wpa_cipher_key_len(wpa_s->mesh_rsn->mgmt_group_cipher);
776 if (end - pos >= (int) (2 + 6 + key_len)) {
777 sta->igtk_key_id = WPA_GET_LE16(pos);
778 wpa_printf(MSG_DEBUG, "mesh: IGTKdata - Key ID %u",
781 os_memcpy(sta->igtk_rsc, pos, sizeof(sta->igtk_rsc));
782 wpa_hexdump(MSG_DEBUG, "mesh: IGTKdata - IPN",
783 sta->igtk_rsc, sizeof(sta->igtk_rsc));
785 os_memcpy(sta->igtk, pos, key_len);
786 sta->igtk_len = key_len;
787 wpa_hexdump_key(MSG_DEBUG, "mesh: IGTKdata - IGTK",
788 sta->igtk, sta->igtk_len);
790 #endif /* CONFIG_IEEE80211W */