1 /*
2 * WPA Supplicant - WPA state machine and EAPOL-Key processing
3 * Copyright (c) 2003-2018, Jouni Malinen <j@w1.fi>
4 * Copyright(c) 2015 Intel Deutschland GmbH
5 *
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
8 */
9
10 #include "includes.h"
11
12 #include "common.h"
13 #include "crypto/aes.h"
14 #include "crypto/aes_wrap.h"
15 #include "crypto/crypto.h"
16 #include "crypto/random.h"
17 #include "crypto/aes_siv.h"
18 #include "crypto/sha256.h"
19 #include "crypto/sha384.h"
20 #include "crypto/sha512.h"
21 #include "common/ieee802_11_defs.h"
22 #include "common/ieee802_11_common.h"
23 #include "common/ocv.h"
24 #include "eap_common/eap_defs.h"
25 #include "eapol_supp/eapol_supp_sm.h"
26 #include "drivers/driver.h"
27 #include "wpa.h"
28 #include "eloop.h"
29 #include "preauth.h"
30 #include "pmksa_cache.h"
31 #include "wpa_i.h"
32 #include "wpa_ie.h"
33
34
35 static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
36
37
38 /**
39 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
40 * @sm: Pointer to WPA state machine data from wpa_sm_init()
41 * @ptk: PTK for Key Confirmation/Encryption Key
42 * @ver: Version field from Key Info
43 * @dest: Destination address for the frame
44 * @proto: Ethertype (usually ETH_P_EAPOL)
45 * @msg: EAPOL-Key message
46 * @msg_len: Length of message
47 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
48 * Returns: >= 0 on success, < 0 on failure
49 */
wpa_eapol_key_send(struct wpa_sm * sm,struct wpa_ptk * ptk,int ver,const u8 * dest,u16 proto,u8 * msg,size_t msg_len,u8 * key_mic)50 int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk,
51 int ver, const u8 *dest, u16 proto,
52 u8 *msg, size_t msg_len, u8 *key_mic)
53 {
54 int ret = -1;
55 size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
56
57 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL-Key frame to " MACSTR
58 " ver=%d mic_len=%d key_mgmt=0x%x",
59 MAC2STR(dest), ver, (int) mic_len, sm->key_mgmt);
60 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
61 /*
62 * Association event was not yet received; try to fetch
63 * BSSID from the driver.
64 */
65 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
66 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
67 "WPA: Failed to read BSSID for "
68 "EAPOL-Key destination address");
69 } else {
70 dest = sm->bssid;
71 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
72 "WPA: Use BSSID (" MACSTR
73 ") as the destination for EAPOL-Key",
74 MAC2STR(dest));
75 }
76 }
77
78 if (mic_len) {
79 if (key_mic && (!ptk || !ptk->kck_len))
80 goto out;
81
82 if (key_mic &&
83 wpa_eapol_key_mic(ptk->kck, ptk->kck_len, sm->key_mgmt, ver,
84 msg, msg_len, key_mic)) {
85 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
86 "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC",
87 ver, sm->key_mgmt);
88 goto out;
89 }
90 if (ptk)
91 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK",
92 ptk->kck, ptk->kck_len);
93 wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC",
94 key_mic, mic_len);
95 } else {
96 #ifdef CONFIG_FILS
97 /* AEAD cipher - Key MIC field not used */
98 struct ieee802_1x_hdr *s_hdr, *hdr;
99 struct wpa_eapol_key *s_key, *key;
100 u8 *buf, *s_key_data, *key_data;
101 size_t buf_len = msg_len + AES_BLOCK_SIZE;
102 size_t key_data_len;
103 u16 eapol_len;
104 const u8 *aad[1];
105 size_t aad_len[1];
106
107 if (!ptk || !ptk->kek_len)
108 goto out;
109
110 key_data_len = msg_len - sizeof(struct ieee802_1x_hdr) -
111 sizeof(struct wpa_eapol_key) - 2;
112
113 buf = os_malloc(buf_len);
114 if (!buf)
115 goto out;
116
117 os_memcpy(buf, msg, msg_len);
118 hdr = (struct ieee802_1x_hdr *) buf;
119 key = (struct wpa_eapol_key *) (hdr + 1);
120 key_data = ((u8 *) (key + 1)) + 2;
121
122 /* Update EAPOL header to include AES-SIV overhead */
123 eapol_len = be_to_host16(hdr->length);
124 eapol_len += AES_BLOCK_SIZE;
125 hdr->length = host_to_be16(eapol_len);
126
127 /* Update Key Data Length field to include AES-SIV overhead */
128 WPA_PUT_BE16((u8 *) (key + 1), AES_BLOCK_SIZE + key_data_len);
129
130 s_hdr = (struct ieee802_1x_hdr *) msg;
131 s_key = (struct wpa_eapol_key *) (s_hdr + 1);
132 s_key_data = ((u8 *) (s_key + 1)) + 2;
133
134 wpa_hexdump_key(MSG_DEBUG, "WPA: Plaintext Key Data",
135 s_key_data, key_data_len);
136
137 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
138 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
139 * to Key Data (exclusive). */
140 aad[0] = buf;
141 aad_len[0] = key_data - buf;
142 if (aes_siv_encrypt(ptk->kek, ptk->kek_len,
143 s_key_data, key_data_len,
144 1, aad, aad_len, key_data) < 0) {
145 os_free(buf);
146 goto out;
147 }
148
149 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
150 key_data, AES_BLOCK_SIZE + key_data_len);
151
152 os_free(msg);
153 msg = buf;
154 msg_len = buf_len;
155 #else /* CONFIG_FILS */
156 goto out;
157 #endif /* CONFIG_FILS */
158 }
159
160 wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
161 ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
162 eapol_sm_notify_tx_eapol_key(sm->eapol);
163 out:
164 os_free(msg);
165 return ret;
166 }
167
168
169 /**
170 * wpa_sm_key_request - Send EAPOL-Key Request
171 * @sm: Pointer to WPA state machine data from wpa_sm_init()
172 * @error: Indicate whether this is an Michael MIC error report
173 * @pairwise: 1 = error report for pairwise packet, 0 = for group packet
174 *
175 * Send an EAPOL-Key Request to the current authenticator. This function is
176 * used to request rekeying and it is usually called when a local Michael MIC
177 * failure is detected.
178 */
wpa_sm_key_request(struct wpa_sm * sm,int error,int pairwise)179 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
180 {
181 size_t mic_len, hdrlen, rlen;
182 struct wpa_eapol_key *reply;
183 int key_info, ver;
184 u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic;
185
186 if (wpa_use_akm_defined(sm->key_mgmt))
187 ver = WPA_KEY_INFO_TYPE_AKM_DEFINED;
188 else if (wpa_key_mgmt_ft(sm->key_mgmt) ||
189 wpa_key_mgmt_sha256(sm->key_mgmt))
190 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
191 else if (sm->pairwise_cipher != WPA_CIPHER_TKIP)
192 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
193 else
194 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
195
196 if (wpa_sm_get_bssid(sm, bssid) < 0) {
197 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
198 "Failed to read BSSID for EAPOL-Key request");
199 return;
200 }
201
202 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
203 hdrlen = sizeof(*reply) + mic_len + 2;
204 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
205 hdrlen, &rlen, (void *) &reply);
206 if (rbuf == NULL)
207 return;
208
209 reply->type = (sm->proto == WPA_PROTO_RSN ||
210 sm->proto == WPA_PROTO_OSEN) ?
211 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
212 key_info = WPA_KEY_INFO_REQUEST | ver;
213 if (sm->ptk_set)
214 key_info |= WPA_KEY_INFO_SECURE;
215 if (sm->ptk_set && mic_len)
216 key_info |= WPA_KEY_INFO_MIC;
217 if (error)
218 key_info |= WPA_KEY_INFO_ERROR;
219 if (pairwise)
220 key_info |= WPA_KEY_INFO_KEY_TYPE;
221 WPA_PUT_BE16(reply->key_info, key_info);
222 WPA_PUT_BE16(reply->key_length, 0);
223 os_memcpy(reply->replay_counter, sm->request_counter,
224 WPA_REPLAY_COUNTER_LEN);
225 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
226
227 mic = (u8 *) (reply + 1);
228 WPA_PUT_BE16(mic + mic_len, 0);
229 if (!(key_info & WPA_KEY_INFO_MIC))
230 key_mic = NULL;
231 else
232 key_mic = mic;
233
234 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
235 "WPA: Sending EAPOL-Key Request (error=%d "
236 "pairwise=%d ptk_set=%d len=%lu)",
237 error, pairwise, sm->ptk_set, (unsigned long) rlen);
238 wpa_eapol_key_send(sm, &sm->ptk, ver, bssid, ETH_P_EAPOL, rbuf, rlen,
239 key_mic);
240 }
241
242
wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm * sm)243 static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm)
244 {
245 #ifdef CONFIG_IEEE80211R
246 if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
247 if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len))
248 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
249 "RSN: Cannot set low order 256 bits of MSK for key management offload");
250 } else {
251 #endif /* CONFIG_IEEE80211R */
252 if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len))
253 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
254 "RSN: Cannot set PMK for key management offload");
255 #ifdef CONFIG_IEEE80211R
256 }
257 #endif /* CONFIG_IEEE80211R */
258 }
259
260
wpa_supplicant_get_pmk(struct wpa_sm * sm,const unsigned char * src_addr,const u8 * pmkid)261 static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
262 const unsigned char *src_addr,
263 const u8 *pmkid)
264 {
265 int abort_cached = 0;
266
267 if (pmkid && !sm->cur_pmksa) {
268 /* When using drivers that generate RSN IE, wpa_supplicant may
269 * not have enough time to get the association information
270 * event before receiving this 1/4 message, so try to find a
271 * matching PMKSA cache entry here. */
272 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid,
273 NULL, 0);
274 if (sm->cur_pmksa) {
275 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
276 "RSN: found matching PMKID from PMKSA cache");
277 } else {
278 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
279 "RSN: no matching PMKID found");
280 abort_cached = 1;
281 }
282 }
283
284 if (pmkid && sm->cur_pmksa &&
285 os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
286 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
287 wpa_sm_set_pmk_from_pmksa(sm);
288 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
289 sm->pmk, sm->pmk_len);
290 eapol_sm_notify_cached(sm->eapol);
291 #ifdef CONFIG_IEEE80211R
292 sm->xxkey_len = 0;
293 #ifdef CONFIG_SAE
294 if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE &&
295 sm->pmk_len == PMK_LEN) {
296 /* Need to allow FT key derivation to proceed with
297 * PMK from SAE being used as the XXKey in cases where
298 * the PMKID in msg 1/4 matches the PMKSA entry that was
299 * just added based on SAE authentication for the
300 * initial mobility domain association. */
301 os_memcpy(sm->xxkey, sm->pmk, sm->pmk_len);
302 sm->xxkey_len = sm->pmk_len;
303 }
304 #endif /* CONFIG_SAE */
305 #endif /* CONFIG_IEEE80211R */
306 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
307 int res, pmk_len;
308
309 if (wpa_key_mgmt_sha384(sm->key_mgmt))
310 pmk_len = PMK_LEN_SUITE_B_192;
311 else
312 pmk_len = PMK_LEN;
313 res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len);
314 if (res) {
315 if (pmk_len == PMK_LEN) {
316 /*
317 * EAP-LEAP is an exception from other EAP
318 * methods: it uses only 16-byte PMK.
319 */
320 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
321 pmk_len = 16;
322 }
323 } else {
324 #ifdef CONFIG_IEEE80211R
325 u8 buf[2 * PMK_LEN];
326 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0)
327 {
328 if (wpa_key_mgmt_sha384(sm->key_mgmt)) {
329 os_memcpy(sm->xxkey, buf,
330 SHA384_MAC_LEN);
331 sm->xxkey_len = SHA384_MAC_LEN;
332 } else {
333 os_memcpy(sm->xxkey, buf + PMK_LEN,
334 PMK_LEN);
335 sm->xxkey_len = PMK_LEN;
336 }
337 os_memset(buf, 0, sizeof(buf));
338 }
339 #endif /* CONFIG_IEEE80211R */
340 }
341 if (res == 0) {
342 struct rsn_pmksa_cache_entry *sa = NULL;
343 const u8 *fils_cache_id = NULL;
344
345 #ifdef CONFIG_FILS
346 if (sm->fils_cache_id_set)
347 fils_cache_id = sm->fils_cache_id;
348 #endif /* CONFIG_FILS */
349
350 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
351 "machines", sm->pmk, pmk_len);
352 sm->pmk_len = pmk_len;
353 wpa_supplicant_key_mgmt_set_pmk(sm);
354 if (sm->proto == WPA_PROTO_RSN &&
355 !wpa_key_mgmt_suite_b(sm->key_mgmt) &&
356 !wpa_key_mgmt_ft(sm->key_mgmt)) {
357 sa = pmksa_cache_add(sm->pmksa,
358 sm->pmk, pmk_len, NULL,
359 NULL, 0,
360 src_addr, sm->own_addr,
361 sm->network_ctx,
362 sm->key_mgmt,
363 fils_cache_id);
364 }
365 if (!sm->cur_pmksa && pmkid &&
366 pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL,
367 0)) {
368 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
369 "RSN: the new PMK matches with the "
370 "PMKID");
371 abort_cached = 0;
372 } else if (sa && !sm->cur_pmksa && pmkid) {
373 /*
374 * It looks like the authentication server
375 * derived mismatching MSK. This should not
376 * really happen, but bugs happen.. There is not
377 * much we can do here without knowing what
378 * exactly caused the server to misbehave.
379 */
380 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
381 "RSN: PMKID mismatch - authentication server may have derived different MSK?!");
382 return -1;
383 }
384
385 if (!sm->cur_pmksa)
386 sm->cur_pmksa = sa;
387 } else {
388 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
389 "WPA: Failed to get master session key from "
390 "EAPOL state machines - key handshake "
391 "aborted");
392 if (sm->cur_pmksa) {
393 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
394 "RSN: Cancelled PMKSA caching "
395 "attempt");
396 sm->cur_pmksa = NULL;
397 abort_cached = 1;
398 } else if (!abort_cached) {
399 return -1;
400 }
401 }
402 }
403
404 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) &&
405 !wpa_key_mgmt_suite_b(sm->key_mgmt) &&
406 !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN)
407 {
408 /* Send EAPOL-Start to trigger full EAP authentication. */
409 u8 *buf;
410 size_t buflen;
411
412 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
413 "RSN: no PMKSA entry found - trigger "
414 "full EAP authentication");
415 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
416 NULL, 0, &buflen, NULL);
417 if (buf) {
418 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
419 buf, buflen);
420 os_free(buf);
421 return -2;
422 }
423
424 return -1;
425 }
426
427 return 0;
428 }
429
430
431 /**
432 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
433 * @sm: Pointer to WPA state machine data from wpa_sm_init()
434 * @dst: Destination address for the frame
435 * @key: Pointer to the EAPOL-Key frame header
436 * @ver: Version bits from EAPOL-Key Key Info
437 * @nonce: Nonce value for the EAPOL-Key frame
438 * @wpa_ie: WPA/RSN IE
439 * @wpa_ie_len: Length of the WPA/RSN IE
440 * @ptk: PTK to use for keyed hash and encryption
441 * Returns: >= 0 on success, < 0 on failure
442 */
wpa_supplicant_send_2_of_4(struct wpa_sm * sm,const unsigned char * dst,const struct wpa_eapol_key * key,int ver,const u8 * nonce,const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ptk * ptk)443 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
444 const struct wpa_eapol_key *key,
445 int ver, const u8 *nonce,
446 const u8 *wpa_ie, size_t wpa_ie_len,
447 struct wpa_ptk *ptk)
448 {
449 size_t mic_len, hdrlen, rlen;
450 struct wpa_eapol_key *reply;
451 u8 *rbuf, *key_mic;
452 u8 *rsn_ie_buf = NULL;
453 u16 key_info;
454
455 if (wpa_ie == NULL) {
456 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - "
457 "cannot generate msg 2/4");
458 return -1;
459 }
460
461 #ifdef CONFIG_IEEE80211R
462 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
463 int res;
464
465 /*
466 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
467 * FTIE from (Re)Association Response.
468 */
469 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
470 sm->assoc_resp_ies_len);
471 if (rsn_ie_buf == NULL)
472 return -1;
473 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
474 res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len,
475 sm->pmk_r1_name);
476 if (res < 0) {
477 os_free(rsn_ie_buf);
478 return -1;
479 }
480
481 if (sm->assoc_resp_ies) {
482 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
483 sm->assoc_resp_ies_len);
484 wpa_ie_len += sm->assoc_resp_ies_len;
485 }
486
487 wpa_ie = rsn_ie_buf;
488 }
489 #endif /* CONFIG_IEEE80211R */
490
491 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
492
493 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
494 hdrlen = sizeof(*reply) + mic_len + 2;
495 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
496 NULL, hdrlen + wpa_ie_len,
497 &rlen, (void *) &reply);
498 if (rbuf == NULL) {
499 os_free(rsn_ie_buf);
500 return -1;
501 }
502
503 reply->type = (sm->proto == WPA_PROTO_RSN ||
504 sm->proto == WPA_PROTO_OSEN) ?
505 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
506 key_info = ver | WPA_KEY_INFO_KEY_TYPE;
507 if (mic_len)
508 key_info |= WPA_KEY_INFO_MIC;
509 else
510 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
511 WPA_PUT_BE16(reply->key_info, key_info);
512 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN)
513 WPA_PUT_BE16(reply->key_length, 0);
514 else
515 os_memcpy(reply->key_length, key->key_length, 2);
516 os_memcpy(reply->replay_counter, key->replay_counter,
517 WPA_REPLAY_COUNTER_LEN);
518 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter,
519 WPA_REPLAY_COUNTER_LEN);
520
521 key_mic = (u8 *) (reply + 1);
522 WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */
523 os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */
524 os_free(rsn_ie_buf);
525
526 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
527
528 wpa_dbg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Sending EAPOL-Key 2/4");
529 return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen,
530 key_mic);
531 }
532
533
wpa_derive_ptk(struct wpa_sm * sm,const unsigned char * src_addr,const struct wpa_eapol_key * key,struct wpa_ptk * ptk)534 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
535 const struct wpa_eapol_key *key, struct wpa_ptk *ptk)
536 {
537 const u8 *z = NULL;
538 size_t z_len = 0;
539
540 #ifdef CONFIG_IEEE80211R
541 if (wpa_key_mgmt_ft(sm->key_mgmt))
542 return wpa_derive_ptk_ft(sm, src_addr, key, ptk);
543 #endif /* CONFIG_IEEE80211R */
544
545 #ifdef CONFIG_DPP2
546 if (sm->key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
547 z = wpabuf_head(sm->dpp_z);
548 z_len = wpabuf_len(sm->dpp_z);
549 }
550 #endif /* CONFIG_DPP2 */
551
552 return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
553 sm->own_addr, sm->bssid, sm->snonce,
554 key->key_nonce, ptk, sm->key_mgmt,
555 sm->pairwise_cipher, z, z_len);
556 }
557
558
wpa_supplicant_process_1_of_4(struct wpa_sm * sm,const unsigned char * src_addr,const struct wpa_eapol_key * key,u16 ver,const u8 * key_data,size_t key_data_len)559 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
560 const unsigned char *src_addr,
561 const struct wpa_eapol_key *key,
562 u16 ver, const u8 *key_data,
563 size_t key_data_len)
564 {
565 struct wpa_eapol_ie_parse ie;
566 struct wpa_ptk *ptk;
567 int res;
568 u8 *kde, *kde_buf = NULL;
569 size_t kde_len;
570
571 if (wpa_sm_get_network_ctx(sm) == NULL) {
572 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info "
573 "found (msg 1 of 4)");
574 return;
575 }
576
577 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
578 wpa_dbg(sm->ctx->msg_ctx, MSG_INFO, "WPA: RX message 1 of 4-Way "
579 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
580
581 os_memset(&ie, 0, sizeof(ie));
582
583 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) {
584 /* RSN: msg 1/4 should contain PMKID for the selected PMK */
585 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data",
586 key_data, key_data_len);
587 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0)
588 goto failed;
589 if (ie.pmkid) {
590 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
591 "Authenticator", ie.pmkid, PMKID_LEN);
592 }
593 }
594
595 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
596 if (res == -2) {
597 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to "
598 "msg 1/4 - requesting full EAP authentication");
599 return;
600 }
601 if (res)
602 goto failed;
603
604 if (sm->renew_snonce) {
605 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
606 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
607 "WPA: Failed to get random data for SNonce");
608 goto failed;
609 }
610 sm->renew_snonce = 0;
611 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
612 sm->snonce, WPA_NONCE_LEN);
613 }
614
615 /* Calculate PTK which will be stored as a temporary PTK until it has
616 * been verified when processing message 3/4. */
617 ptk = &sm->tptk;
618 if (wpa_derive_ptk(sm, src_addr, key, ptk) < 0)
619 goto failed;
620 if (sm->pairwise_cipher == WPA_CIPHER_TKIP) {
621 u8 buf[8];
622 /* Supplicant: swap tx/rx Mic keys */
623 os_memcpy(buf, &ptk->tk[16], 8);
624 os_memcpy(&ptk->tk[16], &ptk->tk[24], 8);
625 os_memcpy(&ptk->tk[24], buf, 8);
626 os_memset(buf, 0, sizeof(buf));
627 }
628 sm->tptk_set = 1;
629
630 kde = sm->assoc_wpa_ie;
631 kde_len = sm->assoc_wpa_ie_len;
632
633 #ifdef CONFIG_OCV
634 if (wpa_sm_ocv_enabled(sm)) {
635 struct wpa_channel_info ci;
636 u8 *pos;
637
638 if (wpa_sm_channel_info(sm, &ci) != 0) {
639 wpa_printf(MSG_WARNING,
640 "Failed to get channel info for OCI element in EAPOL-Key 2/4");
641 goto failed;
642 }
643
644 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 3);
645 if (!kde_buf) {
646 wpa_printf(MSG_WARNING,
647 "Failed to allocate memory for KDE with OCI in EAPOL-Key 2/4");
648 goto failed;
649 }
650
651 os_memcpy(kde_buf, kde, kde_len);
652 kde = kde_buf;
653 pos = kde + kde_len;
654 if (ocv_insert_oci_kde(&ci, &pos) < 0)
655 goto failed;
656 kde_len = pos - kde;
657 }
658 #endif /* CONFIG_OCV */
659
660 #ifdef CONFIG_P2P
661 if (sm->p2p) {
662 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1);
663 if (kde_buf) {
664 u8 *pos;
665 wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE "
666 "into EAPOL-Key 2/4");
667 os_memcpy(kde_buf, kde, kde_len);
668 kde = kde_buf;
669 pos = kde + kde_len;
670 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
671 *pos++ = RSN_SELECTOR_LEN + 1;
672 RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ);
673 pos += RSN_SELECTOR_LEN;
674 *pos++ = 0x01;
675 kde_len = pos - kde;
676 }
677 }
678 #endif /* CONFIG_P2P */
679
680 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
681 kde, kde_len, ptk) < 0)
682 goto failed;
683
684 os_free(kde_buf);
685 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
686 return;
687
688 failed:
689 os_free(kde_buf);
690 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
691 }
692
693
wpa_sm_start_preauth(void * eloop_ctx,void * timeout_ctx)694 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
695 {
696 struct wpa_sm *sm = eloop_ctx;
697 rsn_preauth_candidate_process(sm);
698 }
699
700
wpa_supplicant_key_neg_complete(struct wpa_sm * sm,const u8 * addr,int secure)701 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
702 const u8 *addr, int secure)
703 {
704 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
705 "WPA: Key negotiation completed with "
706 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
707 wpa_cipher_txt(sm->pairwise_cipher),
708 wpa_cipher_txt(sm->group_cipher));
709 wpa_sm_cancel_auth_timeout(sm);
710 wpa_sm_set_state(sm, WPA_COMPLETED);
711
712 if (secure) {
713 wpa_sm_mlme_setprotection(
714 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
715 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
716 eapol_sm_notify_portValid(sm->eapol, TRUE);
717 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
718 sm->key_mgmt == WPA_KEY_MGMT_DPP ||
719 sm->key_mgmt == WPA_KEY_MGMT_OWE)
720 eapol_sm_notify_eap_success(sm->eapol, TRUE);
721 /*
722 * Start preauthentication after a short wait to avoid a
723 * possible race condition between the data receive and key
724 * configuration after the 4-Way Handshake. This increases the
725 * likelihood of the first preauth EAPOL-Start frame getting to
726 * the target AP.
727 */
728 if (!dl_list_empty(&sm->pmksa_candidates))
729 eloop_register_timeout(1, 0, wpa_sm_start_preauth,
730 sm, NULL);
731 }
732
733 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
734 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
735 "RSN: Authenticator accepted "
736 "opportunistic PMKSA entry - marking it valid");
737 sm->cur_pmksa->opportunistic = 0;
738 }
739
740 #ifdef CONFIG_IEEE80211R
741 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
742 /* Prepare for the next transition */
743 wpa_ft_prepare_auth_request(sm, NULL);
744 }
745 #endif /* CONFIG_IEEE80211R */
746 }
747
748
wpa_sm_rekey_ptk(void * eloop_ctx,void * timeout_ctx)749 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
750 {
751 struct wpa_sm *sm = eloop_ctx;
752 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying");
753 wpa_sm_key_request(sm, 0, 1);
754 }
755
756
wpa_supplicant_install_ptk(struct wpa_sm * sm,const struct wpa_eapol_key * key)757 static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
758 const struct wpa_eapol_key *key)
759 {
760 int keylen, rsclen;
761 enum wpa_alg alg;
762 const u8 *key_rsc;
763
764 if (sm->ptk.installed) {
765 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
766 "WPA: Do not re-install same PTK to the driver");
767 return 0;
768 }
769
770 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
771 "WPA: Installing PTK to the driver");
772
773 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
774 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher "
775 "Suite: NONE - do not use pairwise keys");
776 return 0;
777 }
778
779 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
780 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
781 "WPA: Unsupported pairwise cipher %d",
782 sm->pairwise_cipher);
783 return -1;
784 }
785
786 alg = wpa_cipher_to_alg(sm->pairwise_cipher);
787 keylen = wpa_cipher_key_len(sm->pairwise_cipher);
788 if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) {
789 wpa_printf(MSG_DEBUG, "WPA: TK length mismatch: %d != %lu",
790 keylen, (long unsigned int) sm->ptk.tk_len);
791 return -1;
792 }
793 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher);
794
795 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) {
796 key_rsc = null_rsc;
797 } else {
798 key_rsc = key->key_rsc;
799 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
800 }
801
802 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
803 sm->ptk.tk, keylen) < 0) {
804 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
805 "WPA: Failed to set PTK to the "
806 "driver (alg=%d keylen=%d bssid=" MACSTR ")",
807 alg, keylen, MAC2STR(sm->bssid));
808 return -1;
809 }
810
811 /* TK is not needed anymore in supplicant */
812 os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN);
813 sm->ptk.tk_len = 0;
814 sm->ptk.installed = 1;
815
816 if (sm->wpa_ptk_rekey) {
817 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
818 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
819 sm, NULL);
820 }
821
822 return 0;
823 }
824
825
wpa_supplicant_check_group_cipher(struct wpa_sm * sm,int group_cipher,int keylen,int maxkeylen,int * key_rsc_len,enum wpa_alg * alg)826 static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm,
827 int group_cipher,
828 int keylen, int maxkeylen,
829 int *key_rsc_len,
830 enum wpa_alg *alg)
831 {
832 int klen;
833
834 *alg = wpa_cipher_to_alg(group_cipher);
835 if (*alg == WPA_ALG_NONE) {
836 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
837 "WPA: Unsupported Group Cipher %d",
838 group_cipher);
839 return -1;
840 }
841 *key_rsc_len = wpa_cipher_rsc_len(group_cipher);
842
843 klen = wpa_cipher_key_len(group_cipher);
844 if (keylen != klen || maxkeylen < klen) {
845 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
846 "WPA: Unsupported %s Group Cipher key length %d (%d)",
847 wpa_cipher_txt(group_cipher), keylen, maxkeylen);
848 return -1;
849 }
850 return 0;
851 }
852
853
854 struct wpa_gtk_data {
855 enum wpa_alg alg;
856 int tx, key_rsc_len, keyidx;
857 u8 gtk[32];
858 int gtk_len;
859 };
860
861
wpa_supplicant_install_gtk(struct wpa_sm * sm,const struct wpa_gtk_data * gd,const u8 * key_rsc,int wnm_sleep)862 static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
863 const struct wpa_gtk_data *gd,
864 const u8 *key_rsc, int wnm_sleep)
865 {
866 const u8 *_gtk = gd->gtk;
867 u8 gtk_buf[32];
868
869 /* Detect possible key reinstallation */
870 if ((sm->gtk.gtk_len == (size_t) gd->gtk_len &&
871 os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) ||
872 (sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len &&
873 os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk,
874 sm->gtk_wnm_sleep.gtk_len) == 0)) {
875 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
876 "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)",
877 gd->keyidx, gd->tx, gd->gtk_len);
878 return 0;
879 }
880
881 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
882 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
883 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)",
884 gd->keyidx, gd->tx, gd->gtk_len);
885 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
886 if (sm->group_cipher == WPA_CIPHER_TKIP) {
887 /* Swap Tx/Rx keys for Michael MIC */
888 os_memcpy(gtk_buf, gd->gtk, 16);
889 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
890 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
891 _gtk = gtk_buf;
892 }
893 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
894 if (wpa_sm_set_key(sm, gd->alg, NULL,
895 gd->keyidx, 1, key_rsc, gd->key_rsc_len,
896 _gtk, gd->gtk_len) < 0) {
897 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
898 "WPA: Failed to set GTK to the driver "
899 "(Group only)");
900 os_memset(gtk_buf, 0, sizeof(gtk_buf));
901 return -1;
902 }
903 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr,
904 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
905 _gtk, gd->gtk_len) < 0) {
906 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
907 "WPA: Failed to set GTK to "
908 "the driver (alg=%d keylen=%d keyidx=%d)",
909 gd->alg, gd->gtk_len, gd->keyidx);
910 os_memset(gtk_buf, 0, sizeof(gtk_buf));
911 return -1;
912 }
913 os_memset(gtk_buf, 0, sizeof(gtk_buf));
914
915 if (wnm_sleep) {
916 sm->gtk_wnm_sleep.gtk_len = gd->gtk_len;
917 os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk,
918 sm->gtk_wnm_sleep.gtk_len);
919 } else {
920 sm->gtk.gtk_len = gd->gtk_len;
921 os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len);
922 }
923
924 return 0;
925 }
926
927
wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm * sm,int tx)928 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
929 int tx)
930 {
931 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
932 /* Ignore Tx bit for GTK if a pairwise key is used. One AP
933 * seemed to set this bit (incorrectly, since Tx is only when
934 * doing Group Key only APs) and without this workaround, the
935 * data connection does not work because wpa_supplicant
936 * configured non-zero keyidx to be used for unicast. */
937 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
938 "WPA: Tx bit set for GTK, but pairwise "
939 "keys are used - ignore Tx bit");
940 return 0;
941 }
942 return tx;
943 }
944
945
wpa_supplicant_rsc_relaxation(const struct wpa_sm * sm,const u8 * rsc)946 static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm,
947 const u8 *rsc)
948 {
949 int rsclen;
950
951 if (!sm->wpa_rsc_relaxation)
952 return 0;
953
954 rsclen = wpa_cipher_rsc_len(sm->group_cipher);
955
956 /*
957 * Try to detect RSC (endian) corruption issue where the AP sends
958 * the RSC bytes in EAPOL-Key message in the wrong order, both if
959 * it's actually a 6-byte field (as it should be) and if it treats
960 * it as an 8-byte field.
961 * An AP model known to have this bug is the Sapido RB-1632.
962 */
963 if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) {
964 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
965 "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0",
966 rsc[0], rsc[1], rsc[2], rsc[3],
967 rsc[4], rsc[5], rsc[6], rsc[7]);
968
969 return 1;
970 }
971
972 return 0;
973 }
974
975
wpa_supplicant_pairwise_gtk(struct wpa_sm * sm,const struct wpa_eapol_key * key,const u8 * gtk,size_t gtk_len,int key_info)976 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
977 const struct wpa_eapol_key *key,
978 const u8 *gtk, size_t gtk_len,
979 int key_info)
980 {
981 struct wpa_gtk_data gd;
982 const u8 *key_rsc;
983
984 /*
985 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
986 * GTK KDE format:
987 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
988 * Reserved [bits 0-7]
989 * GTK
990 */
991
992 os_memset(&gd, 0, sizeof(gd));
993 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
994 gtk, gtk_len);
995
996 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
997 return -1;
998
999 gd.keyidx = gtk[0] & 0x3;
1000 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1001 !!(gtk[0] & BIT(2)));
1002 gtk += 2;
1003 gtk_len -= 2;
1004
1005 os_memcpy(gd.gtk, gtk, gtk_len);
1006 gd.gtk_len = gtk_len;
1007
1008 key_rsc = key->key_rsc;
1009 if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc))
1010 key_rsc = null_rsc;
1011
1012 if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED &&
1013 (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1014 gtk_len, gtk_len,
1015 &gd.key_rsc_len, &gd.alg) ||
1016 wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0))) {
1017 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1018 "RSN: Failed to install GTK");
1019 os_memset(&gd, 0, sizeof(gd));
1020 return -1;
1021 }
1022 os_memset(&gd, 0, sizeof(gd));
1023
1024 return 0;
1025 }
1026
1027
1028 #ifdef CONFIG_IEEE80211W
wpa_supplicant_install_igtk(struct wpa_sm * sm,const struct wpa_igtk_kde * igtk,int wnm_sleep)1029 static int wpa_supplicant_install_igtk(struct wpa_sm *sm,
1030 const struct wpa_igtk_kde *igtk,
1031 int wnm_sleep)
1032 {
1033 size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher);
1034 u16 keyidx = WPA_GET_LE16(igtk->keyid);
1035
1036 /* Detect possible key reinstallation */
1037 if ((sm->igtk.igtk_len == len &&
1038 os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) ||
1039 (sm->igtk_wnm_sleep.igtk_len == len &&
1040 os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk,
1041 sm->igtk_wnm_sleep.igtk_len) == 0)) {
1042 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1043 "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)",
1044 keyidx);
1045 return 0;
1046 }
1047
1048 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1049 "WPA: IGTK keyid %d pn " COMPACT_MACSTR,
1050 keyidx, MAC2STR(igtk->pn));
1051 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len);
1052 if (keyidx > 4095) {
1053 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1054 "WPA: Invalid IGTK KeyID %d", keyidx);
1055 return -1;
1056 }
1057 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
1058 broadcast_ether_addr,
1059 keyidx, 0, igtk->pn, sizeof(igtk->pn),
1060 igtk->igtk, len) < 0) {
1061 if (keyidx == 0x0400 || keyidx == 0x0500) {
1062 /* Assume the AP has broken PMF implementation since it
1063 * seems to have swapped the KeyID bytes. The AP cannot
1064 * be trusted to implement BIP correctly or provide a
1065 * valid IGTK, so do not try to configure this key with
1066 * swapped KeyID bytes. Instead, continue without
1067 * configuring the IGTK so that the driver can drop any
1068 * received group-addressed robust management frames due
1069 * to missing keys.
1070 *
1071 * Normally, this error behavior would result in us
1072 * disconnecting, but there are number of deployed APs
1073 * with this broken behavior, so as an interoperability
1074 * workaround, allow the connection to proceed. */
1075 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1076 "WPA: Ignore IGTK configuration error due to invalid IGTK KeyID byte order");
1077 } else {
1078 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1079 "WPA: Failed to configure IGTK to the driver");
1080 return -1;
1081 }
1082 }
1083
1084 if (wnm_sleep) {
1085 sm->igtk_wnm_sleep.igtk_len = len;
1086 os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk,
1087 sm->igtk_wnm_sleep.igtk_len);
1088 } else {
1089 sm->igtk.igtk_len = len;
1090 os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len);
1091 }
1092
1093 return 0;
1094 }
1095 #endif /* CONFIG_IEEE80211W */
1096
1097
ieee80211w_set_keys(struct wpa_sm * sm,struct wpa_eapol_ie_parse * ie)1098 static int ieee80211w_set_keys(struct wpa_sm *sm,
1099 struct wpa_eapol_ie_parse *ie)
1100 {
1101 #ifdef CONFIG_IEEE80211W
1102 if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher))
1103 return 0;
1104
1105 if (ie->igtk) {
1106 size_t len;
1107 const struct wpa_igtk_kde *igtk;
1108
1109 len = wpa_cipher_key_len(sm->mgmt_group_cipher);
1110 if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len)
1111 return -1;
1112
1113 igtk = (const struct wpa_igtk_kde *) ie->igtk;
1114 if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0)
1115 return -1;
1116 }
1117
1118 return 0;
1119 #else /* CONFIG_IEEE80211W */
1120 return 0;
1121 #endif /* CONFIG_IEEE80211W */
1122 }
1123
1124
wpa_report_ie_mismatch(struct wpa_sm * sm,const char * reason,const u8 * src_addr,const u8 * wpa_ie,size_t wpa_ie_len,const u8 * rsn_ie,size_t rsn_ie_len)1125 static void wpa_report_ie_mismatch(struct wpa_sm *sm,
1126 const char *reason, const u8 *src_addr,
1127 const u8 *wpa_ie, size_t wpa_ie_len,
1128 const u8 *rsn_ie, size_t rsn_ie_len)
1129 {
1130 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
1131 reason, MAC2STR(src_addr));
1132
1133 if (sm->ap_wpa_ie) {
1134 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
1135 sm->ap_wpa_ie, sm->ap_wpa_ie_len);
1136 }
1137 if (wpa_ie) {
1138 if (!sm->ap_wpa_ie) {
1139 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1140 "WPA: No WPA IE in Beacon/ProbeResp");
1141 }
1142 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
1143 wpa_ie, wpa_ie_len);
1144 }
1145
1146 if (sm->ap_rsn_ie) {
1147 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
1148 sm->ap_rsn_ie, sm->ap_rsn_ie_len);
1149 }
1150 if (rsn_ie) {
1151 if (!sm->ap_rsn_ie) {
1152 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1153 "WPA: No RSN IE in Beacon/ProbeResp");
1154 }
1155 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
1156 rsn_ie, rsn_ie_len);
1157 }
1158
1159 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
1160 }
1161
1162
1163 #ifdef CONFIG_IEEE80211R
1164
ft_validate_mdie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie,const u8 * assoc_resp_mdie)1165 static int ft_validate_mdie(struct wpa_sm *sm,
1166 const unsigned char *src_addr,
1167 struct wpa_eapol_ie_parse *ie,
1168 const u8 *assoc_resp_mdie)
1169 {
1170 struct rsn_mdie *mdie;
1171
1172 mdie = (struct rsn_mdie *) (ie->mdie + 2);
1173 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
1174 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
1175 MOBILITY_DOMAIN_ID_LEN) != 0) {
1176 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did "
1177 "not match with the current mobility domain");
1178 return -1;
1179 }
1180
1181 if (assoc_resp_mdie &&
1182 (assoc_resp_mdie[1] != ie->mdie[1] ||
1183 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) {
1184 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch");
1185 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4",
1186 ie->mdie, 2 + ie->mdie[1]);
1187 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response",
1188 assoc_resp_mdie, 2 + assoc_resp_mdie[1]);
1189 return -1;
1190 }
1191
1192 return 0;
1193 }
1194
1195
ft_validate_ftie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie,const u8 * assoc_resp_ftie)1196 static int ft_validate_ftie(struct wpa_sm *sm,
1197 const unsigned char *src_addr,
1198 struct wpa_eapol_ie_parse *ie,
1199 const u8 *assoc_resp_ftie)
1200 {
1201 if (ie->ftie == NULL) {
1202 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1203 "FT: No FTIE in EAPOL-Key msg 3/4");
1204 return -1;
1205 }
1206
1207 if (assoc_resp_ftie == NULL)
1208 return 0;
1209
1210 if (assoc_resp_ftie[1] != ie->ftie[1] ||
1211 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) {
1212 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch");
1213 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4",
1214 ie->ftie, 2 + ie->ftie[1]);
1215 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response",
1216 assoc_resp_ftie, 2 + assoc_resp_ftie[1]);
1217 return -1;
1218 }
1219
1220 return 0;
1221 }
1222
1223
ft_validate_rsnie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie)1224 static int ft_validate_rsnie(struct wpa_sm *sm,
1225 const unsigned char *src_addr,
1226 struct wpa_eapol_ie_parse *ie)
1227 {
1228 struct wpa_ie_data rsn;
1229
1230 if (!ie->rsn_ie)
1231 return 0;
1232
1233 /*
1234 * Verify that PMKR1Name from EAPOL-Key message 3/4
1235 * matches with the value we derived.
1236 */
1237 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 ||
1238 rsn.num_pmkid != 1 || rsn.pmkid == NULL) {
1239 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in "
1240 "FT 4-way handshake message 3/4");
1241 return -1;
1242 }
1243
1244 if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1245 {
1246 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1247 "FT: PMKR1Name mismatch in "
1248 "FT 4-way handshake message 3/4");
1249 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator",
1250 rsn.pmkid, WPA_PMK_NAME_LEN);
1251 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1252 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1253 return -1;
1254 }
1255
1256 return 0;
1257 }
1258
1259
wpa_supplicant_validate_ie_ft(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie)1260 static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm,
1261 const unsigned char *src_addr,
1262 struct wpa_eapol_ie_parse *ie)
1263 {
1264 const u8 *pos, *end, *mdie = NULL, *ftie = NULL;
1265
1266 if (sm->assoc_resp_ies) {
1267 pos = sm->assoc_resp_ies;
1268 end = pos + sm->assoc_resp_ies_len;
1269 while (end - pos > 2) {
1270 if (2 + pos[1] > end - pos)
1271 break;
1272 switch (*pos) {
1273 case WLAN_EID_MOBILITY_DOMAIN:
1274 mdie = pos;
1275 break;
1276 case WLAN_EID_FAST_BSS_TRANSITION:
1277 ftie = pos;
1278 break;
1279 }
1280 pos += 2 + pos[1];
1281 }
1282 }
1283
1284 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 ||
1285 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 ||
1286 ft_validate_rsnie(sm, src_addr, ie) < 0)
1287 return -1;
1288
1289 return 0;
1290 }
1291
1292 #endif /* CONFIG_IEEE80211R */
1293
1294
wpa_supplicant_validate_ie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie)1295 static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
1296 const unsigned char *src_addr,
1297 struct wpa_eapol_ie_parse *ie)
1298 {
1299 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
1300 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1301 "WPA: No WPA/RSN IE for this AP known. "
1302 "Trying to get from scan results");
1303 if (wpa_sm_get_beacon_ie(sm) < 0) {
1304 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1305 "WPA: Could not find AP from "
1306 "the scan results");
1307 } else {
1308 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG,
1309 "WPA: Found the current AP from "
1310 "updated scan results");
1311 }
1312 }
1313
1314 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
1315 (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
1316 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
1317 "with IE in Beacon/ProbeResp (no IE?)",
1318 src_addr, ie->wpa_ie, ie->wpa_ie_len,
1319 ie->rsn_ie, ie->rsn_ie_len);
1320 return -1;
1321 }
1322
1323 if ((ie->wpa_ie && sm->ap_wpa_ie &&
1324 (ie->wpa_ie_len != sm->ap_wpa_ie_len ||
1325 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
1326 (ie->rsn_ie && sm->ap_rsn_ie &&
1327 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
1328 sm->ap_rsn_ie, sm->ap_rsn_ie_len,
1329 ie->rsn_ie, ie->rsn_ie_len))) {
1330 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
1331 "with IE in Beacon/ProbeResp",
1332 src_addr, ie->wpa_ie, ie->wpa_ie_len,
1333 ie->rsn_ie, ie->rsn_ie_len);
1334 return -1;
1335 }
1336
1337 if (sm->proto == WPA_PROTO_WPA &&
1338 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
1339 wpa_report_ie_mismatch(sm, "Possible downgrade attack "
1340 "detected - RSN was enabled and RSN IE "
1341 "was in msg 3/4, but not in "
1342 "Beacon/ProbeResp",
1343 src_addr, ie->wpa_ie, ie->wpa_ie_len,
1344 ie->rsn_ie, ie->rsn_ie_len);
1345 return -1;
1346 }
1347
1348 #ifdef CONFIG_IEEE80211R
1349 if (wpa_key_mgmt_ft(sm->key_mgmt) &&
1350 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0)
1351 return -1;
1352 #endif /* CONFIG_IEEE80211R */
1353
1354 return 0;
1355 }
1356
1357
1358 /**
1359 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
1360 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1361 * @dst: Destination address for the frame
1362 * @key: Pointer to the EAPOL-Key frame header
1363 * @ver: Version bits from EAPOL-Key Key Info
1364 * @key_info: Key Info
1365 * @ptk: PTK to use for keyed hash and encryption
1366 * Returns: >= 0 on success, < 0 on failure
1367 */
wpa_supplicant_send_4_of_4(struct wpa_sm * sm,const unsigned char * dst,const struct wpa_eapol_key * key,u16 ver,u16 key_info,struct wpa_ptk * ptk)1368 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
1369 const struct wpa_eapol_key *key,
1370 u16 ver, u16 key_info,
1371 struct wpa_ptk *ptk)
1372 {
1373 size_t mic_len, hdrlen, rlen;
1374 struct wpa_eapol_key *reply;
1375 u8 *rbuf, *key_mic;
1376
1377 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
1378 hdrlen = sizeof(*reply) + mic_len + 2;
1379 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1380 hdrlen, &rlen, (void *) &reply);
1381 if (rbuf == NULL)
1382 return -1;
1383
1384 reply->type = (sm->proto == WPA_PROTO_RSN ||
1385 sm->proto == WPA_PROTO_OSEN) ?
1386 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1387 key_info &= WPA_KEY_INFO_SECURE;
1388 key_info |= ver | WPA_KEY_INFO_KEY_TYPE;
1389 if (mic_len)
1390 key_info |= WPA_KEY_INFO_MIC;
1391 else
1392 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1393 WPA_PUT_BE16(reply->key_info, key_info);
1394 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN)
1395 WPA_PUT_BE16(reply->key_length, 0);
1396 else
1397 os_memcpy(reply->key_length, key->key_length, 2);
1398 os_memcpy(reply->replay_counter, key->replay_counter,
1399 WPA_REPLAY_COUNTER_LEN);
1400
1401 key_mic = (u8 *) (reply + 1);
1402 WPA_PUT_BE16(key_mic + mic_len, 0);
1403
1404 wpa_dbg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Sending EAPOL-Key 4/4");
1405 return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen,
1406 key_mic);
1407 }
1408
1409
wpa_supplicant_process_3_of_4(struct wpa_sm * sm,const struct wpa_eapol_key * key,u16 ver,const u8 * key_data,size_t key_data_len)1410 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
1411 const struct wpa_eapol_key *key,
1412 u16 ver, const u8 *key_data,
1413 size_t key_data_len)
1414 {
1415 u16 key_info, keylen;
1416 struct wpa_eapol_ie_parse ie;
1417
1418 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
1419 wpa_dbg(sm->ctx->msg_ctx, MSG_INFO, "WPA: RX message 3 of 4-Way "
1420 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
1421
1422 key_info = WPA_GET_BE16(key->key_info);
1423
1424 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len);
1425 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0)
1426 goto failed;
1427 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1428 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1429 "WPA: GTK IE in unencrypted key data");
1430 goto failed;
1431 }
1432 #ifdef CONFIG_IEEE80211W
1433 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1434 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1435 "WPA: IGTK KDE in unencrypted key data");
1436 goto failed;
1437 }
1438
1439 if (ie.igtk &&
1440 wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) &&
1441 ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN +
1442 (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) {
1443 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1444 "WPA: Invalid IGTK KDE length %lu",
1445 (unsigned long) ie.igtk_len);
1446 goto failed;
1447 }
1448 #endif /* CONFIG_IEEE80211W */
1449
1450 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
1451 goto failed;
1452
1453 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
1454 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1455 "WPA: ANonce from message 1 of 4-Way Handshake "
1456 "differs from 3 of 4-Way Handshake - drop packet (src="
1457 MACSTR ")", MAC2STR(sm->bssid));
1458 goto failed;
1459 }
1460
1461 keylen = WPA_GET_BE16(key->key_length);
1462 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) {
1463 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1464 "WPA: Invalid %s key length %d (src=" MACSTR
1465 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen,
1466 MAC2STR(sm->bssid));
1467 goto failed;
1468 }
1469
1470 #ifdef CONFIG_P2P
1471 if (ie.ip_addr_alloc) {
1472 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4);
1473 wpa_hexdump(MSG_DEBUG, "P2P: IP address info",
1474 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr));
1475 }
1476 #endif /* CONFIG_P2P */
1477
1478 #ifdef CONFIG_OCV
1479 if (wpa_sm_ocv_enabled(sm)) {
1480 struct wpa_channel_info ci;
1481
1482 if (wpa_sm_channel_info(sm, &ci) != 0) {
1483 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1484 "Failed to get channel info to validate received OCI in EAPOL-Key 3/4");
1485 return;
1486 }
1487
1488 if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci,
1489 channel_width_to_int(ci.chanwidth),
1490 ci.seg1_idx) != 0) {
1491 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s",
1492 ocv_errorstr);
1493 return;
1494 }
1495 }
1496 #endif /* CONFIG_OCV */
1497
1498 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
1499 &sm->ptk) < 0) {
1500 goto failed;
1501 }
1502
1503 /* SNonce was successfully used in msg 3/4, so mark it to be renewed
1504 * for the next 4-Way Handshake. If msg 3 is received again, the old
1505 * SNonce will still be used to avoid changing PTK. */
1506 sm->renew_snonce = 1;
1507
1508 if (key_info & WPA_KEY_INFO_INSTALL) {
1509 if (wpa_supplicant_install_ptk(sm, key))
1510 goto failed;
1511 }
1512
1513 if (key_info & WPA_KEY_INFO_SECURE) {
1514 wpa_sm_mlme_setprotection(
1515 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
1516 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
1517 eapol_sm_notify_portValid(sm->eapol, TRUE);
1518 }
1519 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1520
1521 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) {
1522 /* No GTK to be set to the driver */
1523 } else if (!ie.gtk && sm->proto == WPA_PROTO_RSN) {
1524 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1525 "RSN: No GTK KDE included in EAPOL-Key msg 3/4");
1526 goto failed;
1527 } else if (ie.gtk &&
1528 wpa_supplicant_pairwise_gtk(sm, key,
1529 ie.gtk, ie.gtk_len, key_info) < 0) {
1530 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1531 "RSN: Failed to configure GTK");
1532 goto failed;
1533 }
1534
1535 if (ieee80211w_set_keys(sm, &ie) < 0) {
1536 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1537 "RSN: Failed to configure IGTK");
1538 goto failed;
1539 }
1540
1541 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED || ie.gtk)
1542 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1543 key_info & WPA_KEY_INFO_SECURE);
1544
1545 if (ie.gtk)
1546 wpa_sm_set_rekey_offload(sm);
1547
1548 /* Add PMKSA cache entry for Suite B AKMs here since PMKID can be
1549 * calculated only after KCK has been derived. Though, do not replace an
1550 * existing PMKSA entry after each 4-way handshake (i.e., new KCK/PMKID)
1551 * to avoid unnecessary changes of PMKID while continuing to use the
1552 * same PMK. */
1553 if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt) &&
1554 !sm->cur_pmksa) {
1555 struct rsn_pmksa_cache_entry *sa;
1556
1557 sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL,
1558 sm->ptk.kck, sm->ptk.kck_len,
1559 sm->bssid, sm->own_addr,
1560 sm->network_ctx, sm->key_mgmt, NULL);
1561 if (!sm->cur_pmksa)
1562 sm->cur_pmksa = sa;
1563 }
1564
1565 sm->msg_3_of_4_ok = 1;
1566 return;
1567
1568 failed:
1569 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1570 }
1571
1572
wpa_supplicant_process_1_of_2_rsn(struct wpa_sm * sm,const u8 * keydata,size_t keydatalen,u16 key_info,struct wpa_gtk_data * gd)1573 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
1574 const u8 *keydata,
1575 size_t keydatalen,
1576 u16 key_info,
1577 struct wpa_gtk_data *gd)
1578 {
1579 int maxkeylen;
1580 struct wpa_eapol_ie_parse ie;
1581
1582 wpa_hexdump_key(MSG_DEBUG, "RSN: msg 1/2 key data",
1583 keydata, keydatalen);
1584 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0)
1585 return -1;
1586 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1587 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1588 "WPA: GTK IE in unencrypted key data");
1589 return -1;
1590 }
1591 if (ie.gtk == NULL) {
1592 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1593 "WPA: No GTK IE in Group Key msg 1/2");
1594 return -1;
1595 }
1596 maxkeylen = gd->gtk_len = ie.gtk_len - 2;
1597
1598 #ifdef CONFIG_OCV
1599 if (wpa_sm_ocv_enabled(sm)) {
1600 struct wpa_channel_info ci;
1601
1602 if (wpa_sm_channel_info(sm, &ci) != 0) {
1603 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1604 "Failed to get channel info to validate received OCI in EAPOL-Key group msg 1/2");
1605 return -1;
1606 }
1607
1608 if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci,
1609 channel_width_to_int(ci.chanwidth),
1610 ci.seg1_idx) != 0) {
1611 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s",
1612 ocv_errorstr);
1613 return -1;
1614 }
1615 }
1616 #endif /* CONFIG_OCV */
1617
1618 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1619 gd->gtk_len, maxkeylen,
1620 &gd->key_rsc_len, &gd->alg))
1621 return -1;
1622
1623 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake",
1624 ie.gtk, ie.gtk_len);
1625 gd->keyidx = ie.gtk[0] & 0x3;
1626 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1627 !!(ie.gtk[0] & BIT(2)));
1628 if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
1629 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1630 "RSN: Too long GTK in GTK IE (len=%lu)",
1631 (unsigned long) ie.gtk_len - 2);
1632 return -1;
1633 }
1634 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
1635
1636 if (ieee80211w_set_keys(sm, &ie) < 0)
1637 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1638 "RSN: Failed to configure IGTK");
1639
1640 return 0;
1641 }
1642
1643
wpa_supplicant_process_1_of_2_wpa(struct wpa_sm * sm,const struct wpa_eapol_key * key,const u8 * key_data,size_t key_data_len,u16 key_info,u16 ver,struct wpa_gtk_data * gd)1644 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
1645 const struct wpa_eapol_key *key,
1646 const u8 *key_data,
1647 size_t key_data_len, u16 key_info,
1648 u16 ver, struct wpa_gtk_data *gd)
1649 {
1650 size_t maxkeylen;
1651 u16 gtk_len;
1652
1653 gtk_len = WPA_GET_BE16(key->key_length);
1654 maxkeylen = key_data_len;
1655 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1656 if (maxkeylen < 8) {
1657 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1658 "WPA: Too short maxkeylen (%lu)",
1659 (unsigned long) maxkeylen);
1660 return -1;
1661 }
1662 maxkeylen -= 8;
1663 }
1664
1665 if (gtk_len > maxkeylen ||
1666 wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1667 gtk_len, maxkeylen,
1668 &gd->key_rsc_len, &gd->alg))
1669 return -1;
1670
1671 gd->gtk_len = gtk_len;
1672 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1673 WPA_KEY_INFO_KEY_INDEX_SHIFT;
1674 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) {
1675 #ifdef CONFIG_NO_RC4
1676 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1677 "WPA: RC4 not supported in the build");
1678 return -1;
1679 #else /* CONFIG_NO_RC4 */
1680 u8 ek[32];
1681 if (key_data_len > sizeof(gd->gtk)) {
1682 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1683 "WPA: RC4 key data too long (%lu)",
1684 (unsigned long) key_data_len);
1685 return -1;
1686 }
1687 os_memcpy(ek, key->key_iv, 16);
1688 os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len);
1689 os_memcpy(gd->gtk, key_data, key_data_len);
1690 if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) {
1691 os_memset(ek, 0, sizeof(ek));
1692 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1693 "WPA: RC4 failed");
1694 return -1;
1695 }
1696 os_memset(ek, 0, sizeof(ek));
1697 #endif /* CONFIG_NO_RC4 */
1698 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1699 if (maxkeylen % 8) {
1700 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1701 "WPA: Unsupported AES-WRAP len %lu",
1702 (unsigned long) maxkeylen);
1703 return -1;
1704 }
1705 if (maxkeylen > sizeof(gd->gtk)) {
1706 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1707 "WPA: AES-WRAP key data "
1708 "too long (keydatalen=%lu maxkeylen=%lu)",
1709 (unsigned long) key_data_len,
1710 (unsigned long) maxkeylen);
1711 return -1;
1712 }
1713 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8,
1714 key_data, gd->gtk)) {
1715 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1716 "WPA: AES unwrap failed - could not decrypt "
1717 "GTK");
1718 return -1;
1719 }
1720 } else {
1721 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1722 "WPA: Unsupported key_info type %d", ver);
1723 return -1;
1724 }
1725 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
1726 sm, !!(key_info & WPA_KEY_INFO_TXRX));
1727 return 0;
1728 }
1729
1730
wpa_supplicant_send_2_of_2(struct wpa_sm * sm,const struct wpa_eapol_key * key,int ver,u16 key_info)1731 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
1732 const struct wpa_eapol_key *key,
1733 int ver, u16 key_info)
1734 {
1735 size_t mic_len, hdrlen, rlen;
1736 struct wpa_eapol_key *reply;
1737 u8 *rbuf, *key_mic;
1738 size_t kde_len = 0;
1739
1740 #ifdef CONFIG_OCV
1741 if (wpa_sm_ocv_enabled(sm))
1742 kde_len = OCV_OCI_KDE_LEN;
1743 #endif /* CONFIG_OCV */
1744
1745 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
1746 hdrlen = sizeof(*reply) + mic_len + 2;
1747 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1748 hdrlen + kde_len, &rlen, (void *) &reply);
1749 if (rbuf == NULL)
1750 return -1;
1751
1752 reply->type = (sm->proto == WPA_PROTO_RSN ||
1753 sm->proto == WPA_PROTO_OSEN) ?
1754 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1755 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
1756 key_info |= ver | WPA_KEY_INFO_SECURE;
1757 if (mic_len)
1758 key_info |= WPA_KEY_INFO_MIC;
1759 else
1760 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1761 WPA_PUT_BE16(reply->key_info, key_info);
1762 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN)
1763 WPA_PUT_BE16(reply->key_length, 0);
1764 else
1765 os_memcpy(reply->key_length, key->key_length, 2);
1766 os_memcpy(reply->replay_counter, key->replay_counter,
1767 WPA_REPLAY_COUNTER_LEN);
1768
1769 key_mic = (u8 *) (reply + 1);
1770 WPA_PUT_BE16(key_mic + mic_len, kde_len); /* Key Data Length */
1771
1772 #ifdef CONFIG_OCV
1773 if (wpa_sm_ocv_enabled(sm)) {
1774 struct wpa_channel_info ci;
1775 u8 *pos;
1776
1777 if (wpa_sm_channel_info(sm, &ci) != 0) {
1778 wpa_printf(MSG_WARNING,
1779 "Failed to get channel info for OCI element in EAPOL-Key 2/2");
1780 os_free(rbuf);
1781 return -1;
1782 }
1783
1784 pos = key_mic + mic_len + 2; /* Key Data */
1785 if (ocv_insert_oci_kde(&ci, &pos) < 0) {
1786 os_free(rbuf);
1787 return -1;
1788 }
1789 }
1790 #endif /* CONFIG_OCV */
1791
1792 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
1793 return wpa_eapol_key_send(sm, &sm->ptk, ver, sm->bssid, ETH_P_EAPOL,
1794 rbuf, rlen, key_mic);
1795 }
1796
1797
wpa_supplicant_process_1_of_2(struct wpa_sm * sm,const unsigned char * src_addr,const struct wpa_eapol_key * key,const u8 * key_data,size_t key_data_len,u16 ver)1798 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
1799 const unsigned char *src_addr,
1800 const struct wpa_eapol_key *key,
1801 const u8 *key_data,
1802 size_t key_data_len, u16 ver)
1803 {
1804 u16 key_info;
1805 int rekey, ret;
1806 struct wpa_gtk_data gd;
1807 const u8 *key_rsc;
1808
1809 if (!sm->msg_3_of_4_ok && !wpa_fils_is_completed(sm)) {
1810 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1811 "WPA: Group Key Handshake started prior to completion of 4-way handshake");
1812 goto failed;
1813 }
1814
1815 os_memset(&gd, 0, sizeof(gd));
1816
1817 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
1818 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key "
1819 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
1820
1821 key_info = WPA_GET_BE16(key->key_info);
1822
1823 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) {
1824 ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data,
1825 key_data_len, key_info,
1826 &gd);
1827 } else {
1828 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data,
1829 key_data_len,
1830 key_info, ver, &gd);
1831 }
1832
1833 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1834
1835 if (ret)
1836 goto failed;
1837
1838 key_rsc = key->key_rsc;
1839 if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc))
1840 key_rsc = null_rsc;
1841
1842 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0) ||
1843 wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0)
1844 goto failed;
1845 os_memset(&gd, 0, sizeof(gd));
1846
1847 if (rekey) {
1848 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
1849 "completed with " MACSTR " [GTK=%s]",
1850 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
1851 wpa_sm_cancel_auth_timeout(sm);
1852 wpa_sm_set_state(sm, WPA_COMPLETED);
1853 } else {
1854 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1855 key_info &
1856 WPA_KEY_INFO_SECURE);
1857 }
1858
1859 wpa_sm_set_rekey_offload(sm);
1860
1861 return;
1862
1863 failed:
1864 os_memset(&gd, 0, sizeof(gd));
1865 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1866 }
1867
1868
wpa_supplicant_verify_eapol_key_mic(struct wpa_sm * sm,struct wpa_eapol_key * key,u16 ver,const u8 * buf,size_t len)1869 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
1870 struct wpa_eapol_key *key,
1871 u16 ver,
1872 const u8 *buf, size_t len)
1873 {
1874 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
1875 int ok = 0;
1876 size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
1877
1878 os_memcpy(mic, key + 1, mic_len);
1879 if (sm->tptk_set) {
1880 os_memset(key + 1, 0, mic_len);
1881 if (wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len,
1882 sm->key_mgmt,
1883 ver, buf, len, (u8 *) (key + 1)) < 0 ||
1884 os_memcmp_const(mic, key + 1, mic_len) != 0) {
1885 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1886 "WPA: Invalid EAPOL-Key MIC "
1887 "when using TPTK - ignoring TPTK");
1888 #ifdef TEST_FUZZ
1889 wpa_printf(MSG_INFO,
1890 "TEST: Ignore Key MIC failure for fuzz testing");
1891 goto continue_fuzz;
1892 #endif /* TEST_FUZZ */
1893 } else {
1894 #ifdef TEST_FUZZ
1895 continue_fuzz:
1896 #endif /* TEST_FUZZ */
1897 ok = 1;
1898 sm->tptk_set = 0;
1899 sm->ptk_set = 1;
1900 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
1901 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
1902 /*
1903 * This assures the same TPTK in sm->tptk can never be
1904 * copied twice to sm->ptk as the new PTK. In
1905 * combination with the installed flag in the wpa_ptk
1906 * struct, this assures the same PTK is only installed
1907 * once.
1908 */
1909 sm->renew_snonce = 1;
1910 }
1911 }
1912
1913 if (!ok && sm->ptk_set) {
1914 os_memset(key + 1, 0, mic_len);
1915 if (wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len,
1916 sm->key_mgmt,
1917 ver, buf, len, (u8 *) (key + 1)) < 0 ||
1918 os_memcmp_const(mic, key + 1, mic_len) != 0) {
1919 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1920 "WPA: Invalid EAPOL-Key MIC - "
1921 "dropping packet");
1922 #ifdef TEST_FUZZ
1923 wpa_printf(MSG_INFO,
1924 "TEST: Ignore Key MIC failure for fuzz testing");
1925 goto continue_fuzz2;
1926 #endif /* TEST_FUZZ */
1927 return -1;
1928 }
1929 #ifdef TEST_FUZZ
1930 continue_fuzz2:
1931 #endif /* TEST_FUZZ */
1932 ok = 1;
1933 }
1934
1935 if (!ok) {
1936 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1937 "WPA: Could not verify EAPOL-Key MIC - "
1938 "dropping packet");
1939 return -1;
1940 }
1941
1942 os_memcpy(sm->rx_replay_counter, key->replay_counter,
1943 WPA_REPLAY_COUNTER_LEN);
1944 sm->rx_replay_counter_set = 1;
1945 return 0;
1946 }
1947
1948
1949 /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
wpa_supplicant_decrypt_key_data(struct wpa_sm * sm,struct wpa_eapol_key * key,size_t mic_len,u16 ver,u8 * key_data,size_t * key_data_len)1950 static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
1951 struct wpa_eapol_key *key,
1952 size_t mic_len, u16 ver,
1953 u8 *key_data, size_t *key_data_len)
1954 {
1955 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
1956 key_data, *key_data_len);
1957 if (!sm->ptk_set) {
1958 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1959 "WPA: PTK not available, cannot decrypt EAPOL-Key Key "
1960 "Data");
1961 return -1;
1962 }
1963
1964 /* Decrypt key data here so that this operation does not need
1965 * to be implemented separately for each message type. */
1966 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) {
1967 #ifdef CONFIG_NO_RC4
1968 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1969 "WPA: RC4 not supported in the build");
1970 return -1;
1971 #else /* CONFIG_NO_RC4 */
1972 u8 ek[32];
1973
1974 wpa_printf(MSG_DEBUG, "WPA: Decrypt Key Data using RC4");
1975 os_memcpy(ek, key->key_iv, 16);
1976 os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len);
1977 if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) {
1978 os_memset(ek, 0, sizeof(ek));
1979 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1980 "WPA: RC4 failed");
1981 return -1;
1982 }
1983 os_memset(ek, 0, sizeof(ek));
1984 #endif /* CONFIG_NO_RC4 */
1985 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1986 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC ||
1987 wpa_use_aes_key_wrap(sm->key_mgmt)) {
1988 u8 *buf;
1989
1990 wpa_printf(MSG_DEBUG,
1991 "WPA: Decrypt Key Data using AES-UNWRAP (KEK length %u)",
1992 (unsigned int) sm->ptk.kek_len);
1993 if (*key_data_len < 8 || *key_data_len % 8) {
1994 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1995 "WPA: Unsupported AES-WRAP len %u",
1996 (unsigned int) *key_data_len);
1997 return -1;
1998 }
1999 *key_data_len -= 8; /* AES-WRAP adds 8 bytes */
2000 buf = os_malloc(*key_data_len);
2001 if (buf == NULL) {
2002 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2003 "WPA: No memory for AES-UNWRAP buffer");
2004 return -1;
2005 }
2006 #ifdef TEST_FUZZ
2007 os_memset(buf, 0x11, *key_data_len);
2008 #endif /* TEST_FUZZ */
2009 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8,
2010 key_data, buf)) {
2011 #ifdef TEST_FUZZ
2012 wpa_printf(MSG_INFO,
2013 "TEST: Ignore AES unwrap failure for fuzz testing");
2014 goto continue_fuzz;
2015 #endif /* TEST_FUZZ */
2016 bin_clear_free(buf, *key_data_len);
2017 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2018 "WPA: AES unwrap failed - "
2019 "could not decrypt EAPOL-Key key data");
2020 return -1;
2021 }
2022 #ifdef TEST_FUZZ
2023 continue_fuzz:
2024 #endif /* TEST_FUZZ */
2025 os_memcpy(key_data, buf, *key_data_len);
2026 bin_clear_free(buf, *key_data_len);
2027 WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len);
2028 } else {
2029 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2030 "WPA: Unsupported key_info type %d", ver);
2031 return -1;
2032 }
2033 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
2034 key_data, *key_data_len);
2035 return 0;
2036 }
2037
2038
2039 /**
2040 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
2041 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2042 */
wpa_sm_aborted_cached(struct wpa_sm * sm)2043 void wpa_sm_aborted_cached(struct wpa_sm *sm)
2044 {
2045 if (sm && sm->cur_pmksa) {
2046 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2047 "RSN: Cancelling PMKSA caching attempt");
2048 sm->cur_pmksa = NULL;
2049 }
2050 }
2051
2052
wpa_eapol_key_dump(struct wpa_sm * sm,const struct wpa_eapol_key * key,unsigned int key_data_len,const u8 * mic,unsigned int mic_len)2053 static void wpa_eapol_key_dump(struct wpa_sm *sm,
2054 const struct wpa_eapol_key *key,
2055 unsigned int key_data_len,
2056 const u8 *mic, unsigned int mic_len)
2057 {
2058 #ifndef CONFIG_NO_STDOUT_DEBUG
2059 u16 key_info = WPA_GET_BE16(key->key_info);
2060
2061 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type);
2062 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2063 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)",
2064 key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
2065 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
2066 WPA_KEY_INFO_KEY_INDEX_SHIFT,
2067 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
2068 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
2069 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
2070 key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
2071 key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
2072 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
2073 key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
2074 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
2075 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
2076 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2077 " key_length=%u key_data_length=%u",
2078 WPA_GET_BE16(key->key_length), key_data_len);
2079 wpa_hexdump(MSG_DEBUG, " replay_counter",
2080 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
2081 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
2082 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
2083 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
2084 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
2085 wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len);
2086 #endif /* CONFIG_NO_STDOUT_DEBUG */
2087 }
2088
2089
2090 #ifdef CONFIG_FILS
wpa_supp_aead_decrypt(struct wpa_sm * sm,u8 * buf,size_t buf_len,size_t * key_data_len)2091 static int wpa_supp_aead_decrypt(struct wpa_sm *sm, u8 *buf, size_t buf_len,
2092 size_t *key_data_len)
2093 {
2094 struct wpa_ptk *ptk;
2095 struct ieee802_1x_hdr *hdr;
2096 struct wpa_eapol_key *key;
2097 u8 *pos, *tmp;
2098 const u8 *aad[1];
2099 size_t aad_len[1];
2100
2101 if (*key_data_len < AES_BLOCK_SIZE) {
2102 wpa_printf(MSG_INFO, "No room for AES-SIV data in the frame");
2103 return -1;
2104 }
2105
2106 if (sm->tptk_set)
2107 ptk = &sm->tptk;
2108 else if (sm->ptk_set)
2109 ptk = &sm->ptk;
2110 else
2111 return -1;
2112
2113 hdr = (struct ieee802_1x_hdr *) buf;
2114 key = (struct wpa_eapol_key *) (hdr + 1);
2115 pos = (u8 *) (key + 1);
2116 pos += 2; /* Pointing at the Encrypted Key Data field */
2117
2118 tmp = os_malloc(*key_data_len);
2119 if (!tmp)
2120 return -1;
2121
2122 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2123 * to Key Data (exclusive). */
2124 aad[0] = buf;
2125 aad_len[0] = pos - buf;
2126 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, *key_data_len,
2127 1, aad, aad_len, tmp) < 0) {
2128 wpa_printf(MSG_INFO, "Invalid AES-SIV data in the frame");
2129 bin_clear_free(tmp, *key_data_len);
2130 return -1;
2131 }
2132
2133 /* AEAD decryption and validation completed successfully */
2134 (*key_data_len) -= AES_BLOCK_SIZE;
2135 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2136 tmp, *key_data_len);
2137
2138 /* Replace Key Data field with the decrypted version */
2139 os_memcpy(pos, tmp, *key_data_len);
2140 pos -= 2; /* Key Data Length field */
2141 WPA_PUT_BE16(pos, *key_data_len);
2142 bin_clear_free(tmp, *key_data_len);
2143
2144 if (sm->tptk_set) {
2145 sm->tptk_set = 0;
2146 sm->ptk_set = 1;
2147 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
2148 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
2149 }
2150
2151 os_memcpy(sm->rx_replay_counter, key->replay_counter,
2152 WPA_REPLAY_COUNTER_LEN);
2153 sm->rx_replay_counter_set = 1;
2154
2155 return 0;
2156 }
2157 #endif /* CONFIG_FILS */
2158
2159
2160 /**
2161 * wpa_sm_rx_eapol - Process received WPA EAPOL frames
2162 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2163 * @src_addr: Source MAC address of the EAPOL packet
2164 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
2165 * @len: Length of the EAPOL frame
2166 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
2167 *
2168 * This function is called for each received EAPOL frame. Other than EAPOL-Key
2169 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
2170 * only processing WPA and WPA2 EAPOL-Key frames.
2171 *
2172 * The received EAPOL-Key packets are validated and valid packets are replied
2173 * to. In addition, key material (PTK, GTK) is configured at the end of a
2174 * successful key handshake.
2175 */
wpa_sm_rx_eapol(struct wpa_sm * sm,const u8 * src_addr,const u8 * buf,size_t len)2176 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
2177 const u8 *buf, size_t len)
2178 {
2179 size_t plen, data_len, key_data_len;
2180 const struct ieee802_1x_hdr *hdr;
2181 struct wpa_eapol_key *key;
2182 u16 key_info, ver;
2183 u8 *tmp = NULL;
2184 int ret = -1;
2185 u8 *mic, *key_data;
2186 size_t mic_len, keyhdrlen;
2187
2188 #ifdef CONFIG_IEEE80211R
2189 sm->ft_completed = 0;
2190 #endif /* CONFIG_IEEE80211R */
2191
2192 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
2193 keyhdrlen = sizeof(*key) + mic_len + 2;
2194
2195 if (len < sizeof(*hdr) + keyhdrlen) {
2196 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2197 "WPA: EAPOL frame too short to be a WPA "
2198 "EAPOL-Key (len %lu, expecting at least %lu)",
2199 (unsigned long) len,
2200 (unsigned long) sizeof(*hdr) + keyhdrlen);
2201 return 0;
2202 }
2203
2204 hdr = (const struct ieee802_1x_hdr *) buf;
2205 plen = be_to_host16(hdr->length);
2206 data_len = plen + sizeof(*hdr);
2207 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2208 "IEEE 802.1X RX: version=%d type=%d length=%lu",
2209 hdr->version, hdr->type, (unsigned long) plen);
2210
2211 if (hdr->version < EAPOL_VERSION) {
2212 /* TODO: backwards compatibility */
2213 }
2214 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
2215 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2216 "WPA: EAPOL frame (type %u) discarded, "
2217 "not a Key frame", hdr->type);
2218 ret = 0;
2219 goto out;
2220 }
2221 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len);
2222 if (plen > len - sizeof(*hdr) || plen < keyhdrlen) {
2223 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2224 "WPA: EAPOL frame payload size %lu "
2225 "invalid (frame size %lu)",
2226 (unsigned long) plen, (unsigned long) len);
2227 ret = 0;
2228 goto out;
2229 }
2230 if (data_len < len) {
2231 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2232 "WPA: ignoring %lu bytes after the IEEE 802.1X data",
2233 (unsigned long) len - data_len);
2234 }
2235
2236 /*
2237 * Make a copy of the frame since we need to modify the buffer during
2238 * MAC validation and Key Data decryption.
2239 */
2240 tmp = os_memdup(buf, data_len);
2241 if (tmp == NULL)
2242 goto out;
2243 key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr));
2244 mic = (u8 *) (key + 1);
2245 key_data = mic + mic_len + 2;
2246
2247 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
2248 {
2249 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2250 "WPA: EAPOL-Key type (%d) unknown, discarded",
2251 key->type);
2252 ret = 0;
2253 goto out;
2254 }
2255
2256 key_data_len = WPA_GET_BE16(mic + mic_len);
2257 wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len);
2258
2259 if (key_data_len > plen - keyhdrlen) {
2260 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
2261 "frame - key_data overflow (%u > %u)",
2262 (unsigned int) key_data_len,
2263 (unsigned int) (plen - keyhdrlen));
2264 goto out;
2265 }
2266
2267 eapol_sm_notify_lower_layer_success(sm->eapol, 0);
2268 key_info = WPA_GET_BE16(key->key_info);
2269 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
2270 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
2271 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
2272 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
2273 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
2274 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES &&
2275 !wpa_use_akm_defined(sm->key_mgmt)) {
2276 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2277 "WPA: Unsupported EAPOL-Key descriptor version %d",
2278 ver);
2279 goto out;
2280 }
2281
2282 if (wpa_use_akm_defined(sm->key_mgmt) &&
2283 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
2284 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2285 "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)",
2286 ver);
2287 goto out;
2288 }
2289
2290 #ifdef CONFIG_IEEE80211R
2291 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
2292 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
2293 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
2294 !wpa_use_akm_defined(sm->key_mgmt)) {
2295 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2296 "FT: AP did not use AES-128-CMAC");
2297 goto out;
2298 }
2299 } else
2300 #endif /* CONFIG_IEEE80211R */
2301 #ifdef CONFIG_IEEE80211W
2302 if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
2303 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
2304 !wpa_use_akm_defined(sm->key_mgmt)) {
2305 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2306 "WPA: AP did not use the "
2307 "negotiated AES-128-CMAC");
2308 goto out;
2309 }
2310 } else
2311 #endif /* CONFIG_IEEE80211W */
2312 if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
2313 !wpa_use_akm_defined(sm->key_mgmt) &&
2314 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
2315 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2316 "WPA: CCMP is used, but EAPOL-Key "
2317 "descriptor version (%d) is not 2", ver);
2318 if (sm->group_cipher != WPA_CIPHER_CCMP &&
2319 !(key_info & WPA_KEY_INFO_KEY_TYPE)) {
2320 /* Earlier versions of IEEE 802.11i did not explicitly
2321 * require version 2 descriptor for all EAPOL-Key
2322 * packets, so allow group keys to use version 1 if
2323 * CCMP is not used for them. */
2324 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2325 "WPA: Backwards compatibility: allow invalid "
2326 "version for non-CCMP group keys");
2327 } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
2328 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2329 "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used");
2330 } else
2331 goto out;
2332 } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP &&
2333 !wpa_use_akm_defined(sm->key_mgmt) &&
2334 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
2335 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2336 "WPA: GCMP is used, but EAPOL-Key "
2337 "descriptor version (%d) is not 2", ver);
2338 goto out;
2339 }
2340
2341 if (sm->rx_replay_counter_set &&
2342 os_memcmp(key->replay_counter, sm->rx_replay_counter,
2343 WPA_REPLAY_COUNTER_LEN) <= 0) {
2344 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2345 "WPA: EAPOL-Key Replay Counter did not increase - "
2346 "dropping packet");
2347 goto out;
2348 }
2349
2350 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
2351 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2352 "WPA: Unsupported SMK bit in key_info");
2353 goto out;
2354 }
2355
2356 if (!(key_info & WPA_KEY_INFO_ACK)) {
2357 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2358 "WPA: No Ack bit in key_info");
2359 goto out;
2360 }
2361
2362 if (key_info & WPA_KEY_INFO_REQUEST) {
2363 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
2364 "WPA: EAPOL-Key with Request bit - dropped");
2365 goto out;
2366 }
2367
2368 if ((key_info & WPA_KEY_INFO_MIC) &&
2369 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
2370 goto out;
2371
2372 #ifdef CONFIG_FILS
2373 if (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
2374 if (wpa_supp_aead_decrypt(sm, tmp, data_len, &key_data_len))
2375 goto out;
2376 }
2377 #endif /* CONFIG_FILS */
2378
2379 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) &&
2380 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) {
2381 /*
2382 * Only decrypt the Key Data field if the frame's authenticity
2383 * was verified. When using AES-SIV (FILS), the MIC flag is not
2384 * set, so this check should only be performed if mic_len != 0
2385 * which is the case in this code branch.
2386 */
2387 if (!(key_info & WPA_KEY_INFO_MIC)) {
2388 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2389 "WPA: Ignore EAPOL-Key with encrypted but unauthenticated data");
2390 goto out;
2391 }
2392 if (wpa_supplicant_decrypt_key_data(sm, key, mic_len,
2393 ver, key_data,
2394 &key_data_len))
2395 goto out;
2396 }
2397
2398 if (key_info & WPA_KEY_INFO_KEY_TYPE) {
2399 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
2400 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2401 "WPA: Ignored EAPOL-Key (Pairwise) with "
2402 "non-zero key index");
2403 goto out;
2404 }
2405 if (key_info & (WPA_KEY_INFO_MIC |
2406 WPA_KEY_INFO_ENCR_KEY_DATA)) {
2407 /* 3/4 4-Way Handshake */
2408 wpa_supplicant_process_3_of_4(sm, key, ver, key_data,
2409 key_data_len);
2410 } else {
2411 /* 1/4 4-Way Handshake */
2412 wpa_supplicant_process_1_of_4(sm, src_addr, key,
2413 ver, key_data,
2414 key_data_len);
2415 }
2416 } else {
2417 if ((mic_len && (key_info & WPA_KEY_INFO_MIC)) ||
2418 (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA))) {
2419 /* 1/2 Group Key Handshake */
2420 wpa_supplicant_process_1_of_2(sm, src_addr, key,
2421 key_data, key_data_len,
2422 ver);
2423 } else {
2424 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
2425 "WPA: EAPOL-Key (Group) without Mic/Encr bit - "
2426 "dropped");
2427 }
2428 }
2429
2430 ret = 1;
2431
2432 out:
2433 bin_clear_free(tmp, data_len);
2434 return ret;
2435 }
2436
2437
2438 #ifdef CONFIG_CTRL_IFACE
wpa_key_mgmt_suite(struct wpa_sm * sm)2439 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
2440 {
2441 switch (sm->key_mgmt) {
2442 case WPA_KEY_MGMT_IEEE8021X:
2443 return ((sm->proto == WPA_PROTO_RSN ||
2444 sm->proto == WPA_PROTO_OSEN) ?
2445 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
2446 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
2447 case WPA_KEY_MGMT_PSK:
2448 return (sm->proto == WPA_PROTO_RSN ?
2449 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
2450 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
2451 #ifdef CONFIG_IEEE80211R
2452 case WPA_KEY_MGMT_FT_IEEE8021X:
2453 return RSN_AUTH_KEY_MGMT_FT_802_1X;
2454 case WPA_KEY_MGMT_FT_PSK:
2455 return RSN_AUTH_KEY_MGMT_FT_PSK;
2456 #endif /* CONFIG_IEEE80211R */
2457 #ifdef CONFIG_IEEE80211W
2458 case WPA_KEY_MGMT_IEEE8021X_SHA256:
2459 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
2460 case WPA_KEY_MGMT_PSK_SHA256:
2461 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
2462 #endif /* CONFIG_IEEE80211W */
2463 case WPA_KEY_MGMT_CCKM:
2464 return (sm->proto == WPA_PROTO_RSN ?
2465 RSN_AUTH_KEY_MGMT_CCKM:
2466 WPA_AUTH_KEY_MGMT_CCKM);
2467 case WPA_KEY_MGMT_WPA_NONE:
2468 return WPA_AUTH_KEY_MGMT_NONE;
2469 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
2470 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
2471 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
2472 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
2473 default:
2474 return 0;
2475 }
2476 }
2477
2478
2479 #define RSN_SUITE "%02x-%02x-%02x-%d"
2480 #define RSN_SUITE_ARG(s) \
2481 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2482
2483 /**
2484 * wpa_sm_get_mib - Dump text list of MIB entries
2485 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2486 * @buf: Buffer for the list
2487 * @buflen: Length of the buffer
2488 * Returns: Number of bytes written to buffer
2489 *
2490 * This function is used fetch dot11 MIB variables.
2491 */
wpa_sm_get_mib(struct wpa_sm * sm,char * buf,size_t buflen)2492 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
2493 {
2494 char pmkid_txt[PMKID_LEN * 2 + 1];
2495 int rsna, ret;
2496 size_t len;
2497
2498 if (sm->cur_pmksa) {
2499 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2500 sm->cur_pmksa->pmkid, PMKID_LEN);
2501 } else
2502 pmkid_txt[0] = '\0';
2503
2504 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
2505 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
2506 sm->proto == WPA_PROTO_RSN)
2507 rsna = 1;
2508 else
2509 rsna = 0;
2510
2511 ret = os_snprintf(buf, buflen,
2512 "dot11RSNAOptionImplemented=TRUE\n"
2513 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2514 "dot11RSNAEnabled=%s\n"
2515 "dot11RSNAPreauthenticationEnabled=%s\n"
2516 "dot11RSNAConfigVersion=%d\n"
2517 "dot11RSNAConfigPairwiseKeysSupported=5\n"
2518 "dot11RSNAConfigGroupCipherSize=%d\n"
2519 "dot11RSNAConfigPMKLifetime=%d\n"
2520 "dot11RSNAConfigPMKReauthThreshold=%d\n"
2521 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
2522 "dot11RSNAConfigSATimeout=%d\n",
2523 rsna ? "TRUE" : "FALSE",
2524 rsna ? "TRUE" : "FALSE",
2525 RSN_VERSION,
2526 wpa_cipher_key_len(sm->group_cipher) * 8,
2527 sm->dot11RSNAConfigPMKLifetime,
2528 sm->dot11RSNAConfigPMKReauthThreshold,
2529 sm->dot11RSNAConfigSATimeout);
2530 if (os_snprintf_error(buflen, ret))
2531 return 0;
2532 len = ret;
2533
2534 ret = os_snprintf(
2535 buf + len, buflen - len,
2536 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2537 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2538 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2539 "dot11RSNAPMKIDUsed=%s\n"
2540 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2541 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2542 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2543 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
2544 "dot11RSNA4WayHandshakeFailures=%u\n",
2545 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
2546 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
2547 sm->pairwise_cipher)),
2548 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
2549 sm->group_cipher)),
2550 pmkid_txt,
2551 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
2552 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
2553 sm->pairwise_cipher)),
2554 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
2555 sm->group_cipher)),
2556 sm->dot11RSNA4WayHandshakeFailures);
2557 if (!os_snprintf_error(buflen - len, ret))
2558 len += ret;
2559
2560 return (int) len;
2561 }
2562 #endif /* CONFIG_CTRL_IFACE */
2563
2564
wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry * entry,void * ctx,enum pmksa_free_reason reason)2565 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
2566 void *ctx, enum pmksa_free_reason reason)
2567 {
2568 struct wpa_sm *sm = ctx;
2569 int deauth = 0;
2570
2571 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: "
2572 MACSTR " reason=%d", MAC2STR(entry->aa), reason);
2573
2574 if (sm->cur_pmksa == entry) {
2575 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2576 "RSN: %s current PMKSA entry",
2577 reason == PMKSA_REPLACE ? "replaced" : "removed");
2578 pmksa_cache_clear_current(sm);
2579
2580 /*
2581 * If an entry is simply being replaced, there's no need to
2582 * deauthenticate because it will be immediately re-added.
2583 * This happens when EAP authentication is completed again
2584 * (reauth or failed PMKSA caching attempt).
2585 */
2586 if (reason != PMKSA_REPLACE)
2587 deauth = 1;
2588 }
2589
2590 if (reason == PMKSA_EXPIRE &&
2591 (sm->pmk_len == entry->pmk_len &&
2592 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
2593 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2594 "RSN: deauthenticating due to expired PMK");
2595 pmksa_cache_clear_current(sm);
2596 deauth = 1;
2597 }
2598
2599 if (deauth) {
2600 sm->pmk_len = 0;
2601 os_memset(sm->pmk, 0, sizeof(sm->pmk));
2602 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
2603 }
2604 }
2605
2606
2607 /**
2608 * wpa_sm_init - Initialize WPA state machine
2609 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer
2610 * Returns: Pointer to the allocated WPA state machine data
2611 *
2612 * This function is used to allocate a new WPA state machine and the returned
2613 * value is passed to all WPA state machine calls.
2614 */
wpa_sm_init(struct wpa_sm_ctx * ctx)2615 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
2616 {
2617 struct wpa_sm *sm;
2618
2619 sm = os_zalloc(sizeof(*sm));
2620 if (sm == NULL)
2621 return NULL;
2622 dl_list_init(&sm->pmksa_candidates);
2623 sm->renew_snonce = 1;
2624 sm->ctx = ctx;
2625
2626 sm->dot11RSNAConfigPMKLifetime = 43200;
2627 sm->dot11RSNAConfigPMKReauthThreshold = 70;
2628 sm->dot11RSNAConfigSATimeout = 60;
2629
2630 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
2631 if (sm->pmksa == NULL) {
2632 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
2633 "RSN: PMKSA cache initialization failed");
2634 os_free(sm);
2635 return NULL;
2636 }
2637
2638 return sm;
2639 }
2640
2641
2642 /**
2643 * wpa_sm_deinit - Deinitialize WPA state machine
2644 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2645 */
wpa_sm_deinit(struct wpa_sm * sm)2646 void wpa_sm_deinit(struct wpa_sm *sm)
2647 {
2648 if (sm == NULL)
2649 return;
2650 pmksa_cache_deinit(sm->pmksa);
2651 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
2652 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
2653 os_free(sm->assoc_wpa_ie);
2654 os_free(sm->ap_wpa_ie);
2655 os_free(sm->ap_rsn_ie);
2656 wpa_sm_drop_sa(sm);
2657 os_free(sm->ctx);
2658 #ifdef CONFIG_IEEE80211R
2659 os_free(sm->assoc_resp_ies);
2660 #endif /* CONFIG_IEEE80211R */
2661 #ifdef CONFIG_TESTING_OPTIONS
2662 wpabuf_free(sm->test_assoc_ie);
2663 #endif /* CONFIG_TESTING_OPTIONS */
2664 #ifdef CONFIG_FILS_SK_PFS
2665 crypto_ecdh_deinit(sm->fils_ecdh);
2666 #endif /* CONFIG_FILS_SK_PFS */
2667 #ifdef CONFIG_FILS
2668 wpabuf_free(sm->fils_ft_ies);
2669 #endif /* CONFIG_FILS */
2670 #ifdef CONFIG_OWE
2671 crypto_ecdh_deinit(sm->owe_ecdh);
2672 #endif /* CONFIG_OWE */
2673 #ifdef CONFIG_DPP2
2674 wpabuf_clear_free(sm->dpp_z);
2675 #endif /* CONFIG_DPP2 */
2676 os_free(sm);
2677 }
2678
2679
2680 /**
2681 * wpa_sm_notify_assoc - Notify WPA state machine about association
2682 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2683 * @bssid: The BSSID of the new association
2684 *
2685 * This function is called to let WPA state machine know that the connection
2686 * was established.
2687 */
wpa_sm_notify_assoc(struct wpa_sm * sm,const u8 * bssid)2688 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
2689 {
2690 int clear_keys = 1;
2691
2692 if (sm == NULL)
2693 return;
2694
2695 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2696 "WPA: Association event - clear replay counter");
2697 os_memcpy(sm->bssid, bssid, ETH_ALEN);
2698 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
2699 sm->rx_replay_counter_set = 0;
2700 sm->renew_snonce = 1;
2701 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
2702 rsn_preauth_deinit(sm);
2703
2704 #ifdef CONFIG_IEEE80211R
2705 if (wpa_ft_is_completed(sm)) {
2706 /*
2707 * Clear portValid to kick EAPOL state machine to re-enter
2708 * AUTHENTICATED state to get the EAPOL port Authorized.
2709 */
2710 eapol_sm_notify_portValid(sm->eapol, FALSE);
2711 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
2712
2713 /* Prepare for the next transition */
2714 wpa_ft_prepare_auth_request(sm, NULL);
2715
2716 clear_keys = 0;
2717 }
2718 #endif /* CONFIG_IEEE80211R */
2719 #ifdef CONFIG_FILS
2720 if (sm->fils_completed) {
2721 /*
2722 * Clear portValid to kick EAPOL state machine to re-enter
2723 * AUTHENTICATED state to get the EAPOL port Authorized.
2724 */
2725 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
2726 clear_keys = 0;
2727 }
2728 #endif /* CONFIG_FILS */
2729
2730 if (clear_keys) {
2731 /*
2732 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
2733 * this is not part of a Fast BSS Transition.
2734 */
2735 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK");
2736 sm->ptk_set = 0;
2737 os_memset(&sm->ptk, 0, sizeof(sm->ptk));
2738 sm->tptk_set = 0;
2739 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
2740 os_memset(&sm->gtk, 0, sizeof(sm->gtk));
2741 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep));
2742 #ifdef CONFIG_IEEE80211W
2743 os_memset(&sm->igtk, 0, sizeof(sm->igtk));
2744 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep));
2745 #endif /* CONFIG_IEEE80211W */
2746 }
2747
2748 #ifdef CONFIG_TDLS
2749 wpa_tdls_assoc(sm);
2750 #endif /* CONFIG_TDLS */
2751
2752 #ifdef CONFIG_P2P
2753 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr));
2754 #endif /* CONFIG_P2P */
2755 }
2756
2757
2758 /**
2759 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
2760 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2761 *
2762 * This function is called to let WPA state machine know that the connection
2763 * was lost. This will abort any existing pre-authentication session.
2764 */
wpa_sm_notify_disassoc(struct wpa_sm * sm)2765 void wpa_sm_notify_disassoc(struct wpa_sm *sm)
2766 {
2767 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
2768 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
2769 rsn_preauth_deinit(sm);
2770 pmksa_cache_clear_current(sm);
2771 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
2772 sm->dot11RSNA4WayHandshakeFailures++;
2773 #ifdef CONFIG_TDLS
2774 wpa_tdls_disassoc(sm);
2775 #endif /* CONFIG_TDLS */
2776 #ifdef CONFIG_FILS
2777 sm->fils_completed = 0;
2778 #endif /* CONFIG_FILS */
2779 #ifdef CONFIG_IEEE80211R
2780 sm->ft_reassoc_completed = 0;
2781 #endif /* CONFIG_IEEE80211R */
2782
2783 /* Keys are not needed in the WPA state machine anymore */
2784 wpa_sm_drop_sa(sm);
2785
2786 sm->msg_3_of_4_ok = 0;
2787 os_memset(sm->bssid, 0, ETH_ALEN);
2788 }
2789
2790
2791 /**
2792 * wpa_sm_set_pmk - Set PMK
2793 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2794 * @pmk: The new PMK
2795 * @pmk_len: The length of the new PMK in bytes
2796 * @pmkid: Calculated PMKID
2797 * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK
2798 *
2799 * Configure the PMK for WPA state machine.
2800 */
wpa_sm_set_pmk(struct wpa_sm * sm,const u8 * pmk,size_t pmk_len,const u8 * pmkid,const u8 * bssid)2801 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len,
2802 const u8 *pmkid, const u8 *bssid)
2803 {
2804 if (sm == NULL)
2805 return;
2806
2807 wpa_hexdump_key(MSG_DEBUG, "WPA: Set PMK based on external data",
2808 pmk, pmk_len);
2809 sm->pmk_len = pmk_len;
2810 os_memcpy(sm->pmk, pmk, pmk_len);
2811
2812 #ifdef CONFIG_IEEE80211R
2813 /* Set XXKey to be PSK for FT key derivation */
2814 sm->xxkey_len = pmk_len;
2815 os_memcpy(sm->xxkey, pmk, pmk_len);
2816 #endif /* CONFIG_IEEE80211R */
2817
2818 if (bssid) {
2819 pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0,
2820 bssid, sm->own_addr,
2821 sm->network_ctx, sm->key_mgmt, NULL);
2822 }
2823 }
2824
2825
2826 /**
2827 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
2828 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2829 *
2830 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
2831 * will be cleared.
2832 */
wpa_sm_set_pmk_from_pmksa(struct wpa_sm * sm)2833 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
2834 {
2835 if (sm == NULL)
2836 return;
2837
2838 if (sm->cur_pmksa) {
2839 wpa_hexdump_key(MSG_DEBUG,
2840 "WPA: Set PMK based on current PMKSA",
2841 sm->cur_pmksa->pmk, sm->cur_pmksa->pmk_len);
2842 sm->pmk_len = sm->cur_pmksa->pmk_len;
2843 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
2844 } else {
2845 wpa_printf(MSG_DEBUG, "WPA: No current PMKSA - clear PMK");
2846 sm->pmk_len = 0;
2847 os_memset(sm->pmk, 0, PMK_LEN_MAX);
2848 }
2849 }
2850
2851
2852 /**
2853 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
2854 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2855 * @fast_reauth: Whether fast reauthentication (EAP) is allowed
2856 */
wpa_sm_set_fast_reauth(struct wpa_sm * sm,int fast_reauth)2857 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
2858 {
2859 if (sm)
2860 sm->fast_reauth = fast_reauth;
2861 }
2862
2863
2864 /**
2865 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
2866 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2867 * @scard_ctx: Context pointer for smartcard related callback functions
2868 */
wpa_sm_set_scard_ctx(struct wpa_sm * sm,void * scard_ctx)2869 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
2870 {
2871 if (sm == NULL)
2872 return;
2873 sm->scard_ctx = scard_ctx;
2874 if (sm->preauth_eapol)
2875 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
2876 }
2877
2878
2879 /**
2880 * wpa_sm_set_config - Notification of current configration change
2881 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2882 * @config: Pointer to current network configuration
2883 *
2884 * Notify WPA state machine that configuration has changed. config will be
2885 * stored as a backpointer to network configuration. This can be %NULL to clear
2886 * the stored pointed.
2887 */
wpa_sm_set_config(struct wpa_sm * sm,struct rsn_supp_config * config)2888 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
2889 {
2890 if (!sm)
2891 return;
2892
2893 if (config) {
2894 sm->network_ctx = config->network_ctx;
2895 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
2896 sm->proactive_key_caching = config->proactive_key_caching;
2897 sm->eap_workaround = config->eap_workaround;
2898 sm->eap_conf_ctx = config->eap_conf_ctx;
2899 if (config->ssid) {
2900 os_memcpy(sm->ssid, config->ssid, config->ssid_len);
2901 sm->ssid_len = config->ssid_len;
2902 } else
2903 sm->ssid_len = 0;
2904 sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
2905 sm->p2p = config->p2p;
2906 sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation;
2907 #ifdef CONFIG_FILS
2908 if (config->fils_cache_id) {
2909 sm->fils_cache_id_set = 1;
2910 os_memcpy(sm->fils_cache_id, config->fils_cache_id,
2911 FILS_CACHE_ID_LEN);
2912 } else {
2913 sm->fils_cache_id_set = 0;
2914 }
2915 #endif /* CONFIG_FILS */
2916 } else {
2917 sm->network_ctx = NULL;
2918 sm->allowed_pairwise_cipher = 0;
2919 sm->proactive_key_caching = 0;
2920 sm->eap_workaround = 0;
2921 sm->eap_conf_ctx = NULL;
2922 sm->ssid_len = 0;
2923 sm->wpa_ptk_rekey = 0;
2924 sm->p2p = 0;
2925 sm->wpa_rsc_relaxation = 0;
2926 }
2927 }
2928
2929
2930 /**
2931 * wpa_sm_set_own_addr - Set own MAC address
2932 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2933 * @addr: Own MAC address
2934 */
wpa_sm_set_own_addr(struct wpa_sm * sm,const u8 * addr)2935 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
2936 {
2937 if (sm)
2938 os_memcpy(sm->own_addr, addr, ETH_ALEN);
2939 }
2940
2941
2942 /**
2943 * wpa_sm_set_ifname - Set network interface name
2944 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2945 * @ifname: Interface name
2946 * @bridge_ifname: Optional bridge interface name (for pre-auth)
2947 */
wpa_sm_set_ifname(struct wpa_sm * sm,const char * ifname,const char * bridge_ifname)2948 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
2949 const char *bridge_ifname)
2950 {
2951 if (sm) {
2952 sm->ifname = ifname;
2953 sm->bridge_ifname = bridge_ifname;
2954 }
2955 }
2956
2957
2958 /**
2959 * wpa_sm_set_eapol - Set EAPOL state machine pointer
2960 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2961 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
2962 */
wpa_sm_set_eapol(struct wpa_sm * sm,struct eapol_sm * eapol)2963 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
2964 {
2965 if (sm)
2966 sm->eapol = eapol;
2967 }
2968
2969
2970 /**
2971 * wpa_sm_set_param - Set WPA state machine parameters
2972 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2973 * @param: Parameter field
2974 * @value: Parameter value
2975 * Returns: 0 on success, -1 on failure
2976 */
wpa_sm_set_param(struct wpa_sm * sm,enum wpa_sm_conf_params param,unsigned int value)2977 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
2978 unsigned int value)
2979 {
2980 int ret = 0;
2981
2982 if (sm == NULL)
2983 return -1;
2984
2985 switch (param) {
2986 case RSNA_PMK_LIFETIME:
2987 if (value > 0)
2988 sm->dot11RSNAConfigPMKLifetime = value;
2989 else
2990 ret = -1;
2991 break;
2992 case RSNA_PMK_REAUTH_THRESHOLD:
2993 if (value > 0 && value <= 100)
2994 sm->dot11RSNAConfigPMKReauthThreshold = value;
2995 else
2996 ret = -1;
2997 break;
2998 case RSNA_SA_TIMEOUT:
2999 if (value > 0)
3000 sm->dot11RSNAConfigSATimeout = value;
3001 else
3002 ret = -1;
3003 break;
3004 case WPA_PARAM_PROTO:
3005 sm->proto = value;
3006 break;
3007 case WPA_PARAM_PAIRWISE:
3008 sm->pairwise_cipher = value;
3009 break;
3010 case WPA_PARAM_GROUP:
3011 sm->group_cipher = value;
3012 break;
3013 case WPA_PARAM_KEY_MGMT:
3014 sm->key_mgmt = value;
3015 break;
3016 #ifdef CONFIG_IEEE80211W
3017 case WPA_PARAM_MGMT_GROUP:
3018 sm->mgmt_group_cipher = value;
3019 break;
3020 #endif /* CONFIG_IEEE80211W */
3021 case WPA_PARAM_RSN_ENABLED:
3022 sm->rsn_enabled = value;
3023 break;
3024 case WPA_PARAM_MFP:
3025 sm->mfp = value;
3026 break;
3027 case WPA_PARAM_OCV:
3028 sm->ocv = value;
3029 break;
3030 default:
3031 break;
3032 }
3033
3034 return ret;
3035 }
3036
3037
3038 /**
3039 * wpa_sm_get_status - Get WPA state machine
3040 * @sm: Pointer to WPA state machine data from wpa_sm_init()
3041 * @buf: Buffer for status information
3042 * @buflen: Maximum buffer length
3043 * @verbose: Whether to include verbose status information
3044 * Returns: Number of bytes written to buf.
3045 *
3046 * Query WPA state machine for status information. This function fills in
3047 * a text area with current status information. If the buffer (buf) is not
3048 * large enough, status information will be truncated to fit the buffer.
3049 */
wpa_sm_get_status(struct wpa_sm * sm,char * buf,size_t buflen,int verbose)3050 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
3051 int verbose)
3052 {
3053 char *pos = buf, *end = buf + buflen;
3054 int ret;
3055
3056 ret = os_snprintf(pos, end - pos,
3057 "pairwise_cipher=%s\n"
3058 "group_cipher=%s\n"
3059 "key_mgmt=%s\n",
3060 wpa_cipher_txt(sm->pairwise_cipher),
3061 wpa_cipher_txt(sm->group_cipher),
3062 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
3063 if (os_snprintf_error(end - pos, ret))
3064 return pos - buf;
3065 pos += ret;
3066
3067 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) {
3068 struct wpa_ie_data rsn;
3069 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn)
3070 >= 0 &&
3071 rsn.capabilities & (WPA_CAPABILITY_MFPR |
3072 WPA_CAPABILITY_MFPC)) {
3073 ret = os_snprintf(pos, end - pos, "pmf=%d\n"
3074 "mgmt_group_cipher=%s\n",
3075 (rsn.capabilities &
3076 WPA_CAPABILITY_MFPR) ? 2 : 1,
3077 wpa_cipher_txt(
3078 sm->mgmt_group_cipher));
3079 if (os_snprintf_error(end - pos, ret))
3080 return pos - buf;
3081 pos += ret;
3082 }
3083 }
3084
3085 return pos - buf;
3086 }
3087
3088
wpa_sm_pmf_enabled(struct wpa_sm * sm)3089 int wpa_sm_pmf_enabled(struct wpa_sm *sm)
3090 {
3091 struct wpa_ie_data rsn;
3092
3093 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie)
3094 return 0;
3095
3096 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 &&
3097 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC))
3098 return 1;
3099
3100 return 0;
3101 }
3102
3103
wpa_sm_ocv_enabled(struct wpa_sm * sm)3104 int wpa_sm_ocv_enabled(struct wpa_sm *sm)
3105 {
3106 struct wpa_ie_data rsn;
3107
3108 if (!sm->ocv || !sm->ap_rsn_ie)
3109 return 0;
3110
3111 return wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len,
3112 &rsn) >= 0 &&
3113 (rsn.capabilities & WPA_CAPABILITY_OCVC);
3114 }
3115
3116
3117 /**
3118 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
3119 * @sm: Pointer to WPA state machine data from wpa_sm_init()
3120 * @wpa_ie: Pointer to buffer for WPA/RSN IE
3121 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer
3122 * Returns: 0 on success, -1 on failure
3123 */
wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm * sm,u8 * wpa_ie,size_t * wpa_ie_len)3124 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
3125 size_t *wpa_ie_len)
3126 {
3127 int res;
3128
3129 if (sm == NULL)
3130 return -1;
3131
3132 #ifdef CONFIG_TESTING_OPTIONS
3133 if (sm->test_assoc_ie) {
3134 wpa_printf(MSG_DEBUG,
3135 "TESTING: Replace association WPA/RSN IE");
3136 if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie))
3137 return -1;
3138 os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie),
3139 wpabuf_len(sm->test_assoc_ie));
3140 res = wpabuf_len(sm->test_assoc_ie);
3141 } else
3142 #endif /* CONFIG_TESTING_OPTIONS */
3143 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
3144 if (res < 0)
3145 return -1;
3146 *wpa_ie_len = res;
3147
3148 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
3149 wpa_ie, *wpa_ie_len);
3150
3151 if (sm->assoc_wpa_ie == NULL) {
3152 /*
3153 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
3154 * the correct version of the IE even if PMKSA caching is
3155 * aborted (which would remove PMKID from IE generation).
3156 */
3157 sm->assoc_wpa_ie = os_memdup(wpa_ie, *wpa_ie_len);
3158 if (sm->assoc_wpa_ie == NULL)
3159 return -1;
3160
3161 sm->assoc_wpa_ie_len = *wpa_ie_len;
3162 } else {
3163 wpa_hexdump(MSG_DEBUG,
3164 "WPA: Leave previously set WPA IE default",
3165 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
3166 }
3167
3168 return 0;
3169 }
3170
3171
3172 /**
3173 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
3174 * @sm: Pointer to WPA state machine data from wpa_sm_init()
3175 * @ie: Pointer to IE data (starting from id)
3176 * @len: IE length
3177 * Returns: 0 on success, -1 on failure
3178 *
3179 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association
3180 * Request frame. The IE will be used to override the default value generated
3181 * with wpa_sm_set_assoc_wpa_ie_default().
3182 */
wpa_sm_set_assoc_wpa_ie(struct wpa_sm * sm,const u8 * ie,size_t len)3183 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
3184 {
3185 if (sm == NULL)
3186 return -1;
3187
3188 os_free(sm->assoc_wpa_ie);
3189 if (ie == NULL || len == 0) {
3190 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
3191 "WPA: clearing own WPA/RSN IE");
3192 sm->assoc_wpa_ie = NULL;
3193 sm->assoc_wpa_ie_len = 0;
3194 } else {
3195 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
3196 sm->assoc_wpa_ie = os_memdup(ie, len);
3197 if (sm->assoc_wpa_ie == NULL)
3198 return -1;
3199
3200 sm->assoc_wpa_ie_len = len;
3201 }
3202
3203 return 0;
3204 }
3205
3206
3207 /**
3208 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
3209 * @sm: Pointer to WPA state machine data from wpa_sm_init()
3210 * @ie: Pointer to IE data (starting from id)
3211 * @len: IE length
3212 * Returns: 0 on success, -1 on failure
3213 *
3214 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response
3215 * frame.
3216 */
wpa_sm_set_ap_wpa_ie(struct wpa_sm * sm,const u8 * ie,size_t len)3217 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
3218 {
3219 if (sm == NULL)
3220 return -1;
3221
3222 os_free(sm->ap_wpa_ie);
3223 if (ie == NULL || len == 0) {
3224 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
3225 "WPA: clearing AP WPA IE");
3226 sm->ap_wpa_ie = NULL;
3227 sm->ap_wpa_ie_len = 0;
3228 } else {
3229 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
3230 sm->ap_wpa_ie = os_memdup(ie, len);
3231 if (sm->ap_wpa_ie == NULL)
3232 return -1;
3233
3234 sm->ap_wpa_ie_len = len;
3235 }
3236
3237 return 0;
3238 }
3239
3240
3241 /**
3242 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
3243 * @sm: Pointer to WPA state machine data from wpa_sm_init()
3244 * @ie: Pointer to IE data (starting from id)
3245 * @len: IE length
3246 * Returns: 0 on success, -1 on failure
3247 *
3248 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response
3249 * frame.
3250 */
wpa_sm_set_ap_rsn_ie(struct wpa_sm * sm,const u8 * ie,size_t len)3251 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
3252 {
3253 if (sm == NULL)
3254 return -1;
3255
3256 os_free(sm->ap_rsn_ie);
3257 if (ie == NULL || len == 0) {
3258 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
3259 "WPA: clearing AP RSN IE");
3260 sm->ap_rsn_ie = NULL;
3261 sm->ap_rsn_ie_len = 0;
3262 } else {
3263 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
3264 sm->ap_rsn_ie = os_memdup(ie, len);
3265 if (sm->ap_rsn_ie == NULL)
3266 return -1;
3267
3268 sm->ap_rsn_ie_len = len;
3269 }
3270
3271 return 0;
3272 }
3273
3274
3275 /**
3276 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
3277 * @sm: Pointer to WPA state machine data from wpa_sm_init()
3278 * @data: Pointer to data area for parsing results
3279 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
3280 *
3281 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
3282 * parsed data into data.
3283 */
wpa_sm_parse_own_wpa_ie(struct wpa_sm * sm,struct wpa_ie_data * data)3284 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
3285 {
3286 if (sm == NULL)
3287 return -1;
3288
3289 if (sm->assoc_wpa_ie == NULL) {
3290 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
3291 "WPA: No WPA/RSN IE available from association info");
3292 return -1;
3293 }
3294 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
3295 return -2;
3296 return 0;
3297 }
3298
3299
wpa_sm_pmksa_cache_list(struct wpa_sm * sm,char * buf,size_t len)3300 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
3301 {
3302 return pmksa_cache_list(sm->pmksa, buf, len);
3303 }
3304
3305
wpa_sm_pmksa_cache_head(struct wpa_sm * sm)3306 struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm)
3307 {
3308 return pmksa_cache_head(sm->pmksa);
3309 }
3310
3311
3312 struct rsn_pmksa_cache_entry *
wpa_sm_pmksa_cache_add_entry(struct wpa_sm * sm,struct rsn_pmksa_cache_entry * entry)3313 wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm,
3314 struct rsn_pmksa_cache_entry * entry)
3315 {
3316 return pmksa_cache_add_entry(sm->pmksa, entry);
3317 }
3318
3319
wpa_sm_pmksa_cache_add(struct wpa_sm * sm,const u8 * pmk,size_t pmk_len,const u8 * pmkid,const u8 * bssid,const u8 * fils_cache_id)3320 void wpa_sm_pmksa_cache_add(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len,
3321 const u8 *pmkid, const u8 *bssid,
3322 const u8 *fils_cache_id)
3323 {
3324 sm->cur_pmksa = pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0,
3325 bssid, sm->own_addr, sm->network_ctx,
3326 sm->key_mgmt, fils_cache_id);
3327 }
3328
3329
wpa_sm_pmksa_exists(struct wpa_sm * sm,const u8 * bssid,const void * network_ctx)3330 int wpa_sm_pmksa_exists(struct wpa_sm *sm, const u8 *bssid,
3331 const void *network_ctx)
3332 {
3333 return pmksa_cache_get(sm->pmksa, bssid, NULL, network_ctx, 0) != NULL;
3334 }
3335
3336
wpa_sm_drop_sa(struct wpa_sm * sm)3337 void wpa_sm_drop_sa(struct wpa_sm *sm)
3338 {
3339 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK");
3340 sm->ptk_set = 0;
3341 sm->tptk_set = 0;
3342 sm->pmk_len = 0;
3343 os_memset(sm->pmk, 0, sizeof(sm->pmk));
3344 os_memset(&sm->ptk, 0, sizeof(sm->ptk));
3345 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
3346 os_memset(&sm->gtk, 0, sizeof(sm->gtk));
3347 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep));
3348 #ifdef CONFIG_IEEE80211W
3349 os_memset(&sm->igtk, 0, sizeof(sm->igtk));
3350 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep));
3351 #endif /* CONFIG_IEEE80211W */
3352 #ifdef CONFIG_IEEE80211R
3353 os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
3354 sm->xxkey_len = 0;
3355 os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0));
3356 sm->pmk_r0_len = 0;
3357 os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1));
3358 sm->pmk_r1_len = 0;
3359 #endif /* CONFIG_IEEE80211R */
3360 }
3361
3362
wpa_sm_has_ptk(struct wpa_sm * sm)3363 int wpa_sm_has_ptk(struct wpa_sm *sm)
3364 {
3365 if (sm == NULL)
3366 return 0;
3367 return sm->ptk_set;
3368 }
3369
3370
wpa_sm_update_replay_ctr(struct wpa_sm * sm,const u8 * replay_ctr)3371 void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr)
3372 {
3373 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN);
3374 }
3375
3376
wpa_sm_pmksa_cache_flush(struct wpa_sm * sm,void * network_ctx)3377 void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
3378 {
3379 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0);
3380 }
3381
3382
3383 #ifdef CONFIG_WNM
wpa_wnmsleep_install_key(struct wpa_sm * sm,u8 subelem_id,u8 * buf)3384 int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
3385 {
3386 u16 keyinfo;
3387 u8 keylen; /* plaintext key len */
3388 u8 *key_rsc;
3389
3390 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) {
3391 struct wpa_gtk_data gd;
3392
3393 os_memset(&gd, 0, sizeof(gd));
3394 keylen = wpa_cipher_key_len(sm->group_cipher);
3395 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher);
3396 gd.alg = wpa_cipher_to_alg(sm->group_cipher);
3397 if (gd.alg == WPA_ALG_NONE) {
3398 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite");
3399 return -1;
3400 }
3401
3402 key_rsc = buf + 5;
3403 keyinfo = WPA_GET_LE16(buf + 2);
3404 gd.gtk_len = keylen;
3405 if (gd.gtk_len != buf[4]) {
3406 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d",
3407 gd.gtk_len, buf[4]);
3408 return -1;
3409 }
3410 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */
3411 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(
3412 sm, !!(keyinfo & WPA_KEY_INFO_TXRX));
3413
3414 os_memcpy(gd.gtk, buf + 13, gd.gtk_len);
3415
3416 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)",
3417 gd.gtk, gd.gtk_len);
3418 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) {
3419 os_memset(&gd, 0, sizeof(gd));
3420 wpa_printf(MSG_DEBUG, "Failed to install the GTK in "
3421 "WNM mode");
3422 return -1;
3423 }
3424 os_memset(&gd, 0, sizeof(gd));
3425 #ifdef CONFIG_IEEE80211W
3426 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
3427 const struct wpa_igtk_kde *igtk;
3428
3429 igtk = (const struct wpa_igtk_kde *) (buf + 2);
3430 if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0)
3431 return -1;
3432 #endif /* CONFIG_IEEE80211W */
3433 } else {
3434 wpa_printf(MSG_DEBUG, "Unknown element id");
3435 return -1;
3436 }
3437
3438 return 0;
3439 }
3440 #endif /* CONFIG_WNM */
3441
3442
3443 #ifdef CONFIG_P2P
3444
wpa_sm_get_p2p_ip_addr(struct wpa_sm * sm,u8 * buf)3445 int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf)
3446 {
3447 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0)
3448 return -1;
3449 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4);
3450 return 0;
3451 }
3452
3453 #endif /* CONFIG_P2P */
3454
3455
wpa_sm_set_rx_replay_ctr(struct wpa_sm * sm,const u8 * rx_replay_counter)3456 void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter)
3457 {
3458 if (rx_replay_counter == NULL)
3459 return;
3460
3461 os_memcpy(sm->rx_replay_counter, rx_replay_counter,
3462 WPA_REPLAY_COUNTER_LEN);
3463 sm->rx_replay_counter_set = 1;
3464 wpa_printf(MSG_DEBUG, "Updated key replay counter");
3465 }
3466
3467
wpa_sm_set_ptk_kck_kek(struct wpa_sm * sm,const u8 * ptk_kck,size_t ptk_kck_len,const u8 * ptk_kek,size_t ptk_kek_len)3468 void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm,
3469 const u8 *ptk_kck, size_t ptk_kck_len,
3470 const u8 *ptk_kek, size_t ptk_kek_len)
3471 {
3472 if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) {
3473 os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len);
3474 sm->ptk.kck_len = ptk_kck_len;
3475 wpa_printf(MSG_DEBUG, "Updated PTK KCK");
3476 }
3477 if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) {
3478 os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len);
3479 sm->ptk.kek_len = ptk_kek_len;
3480 wpa_printf(MSG_DEBUG, "Updated PTK KEK");
3481 }
3482 sm->ptk_set = 1;
3483 }
3484
3485
3486 #ifdef CONFIG_TESTING_OPTIONS
3487
wpa_sm_set_test_assoc_ie(struct wpa_sm * sm,struct wpabuf * buf)3488 void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf)
3489 {
3490 wpabuf_free(sm->test_assoc_ie);
3491 sm->test_assoc_ie = buf;
3492 }
3493
3494
wpa_sm_get_anonce(struct wpa_sm * sm)3495 const u8 * wpa_sm_get_anonce(struct wpa_sm *sm)
3496 {
3497 return sm->anonce;
3498 }
3499
3500 #endif /* CONFIG_TESTING_OPTIONS */
3501
3502
wpa_sm_get_key_mgmt(struct wpa_sm * sm)3503 unsigned int wpa_sm_get_key_mgmt(struct wpa_sm *sm)
3504 {
3505 return sm->key_mgmt;
3506 }
3507
3508
3509 #ifdef CONFIG_FILS
3510
fils_build_auth(struct wpa_sm * sm,int dh_group,const u8 * md)3511 struct wpabuf * fils_build_auth(struct wpa_sm *sm, int dh_group, const u8 *md)
3512 {
3513 struct wpabuf *buf = NULL;
3514 struct wpabuf *erp_msg;
3515 struct wpabuf *pub = NULL;
3516
3517 erp_msg = eapol_sm_build_erp_reauth_start(sm->eapol);
3518 if (!erp_msg && !sm->cur_pmksa) {
3519 wpa_printf(MSG_DEBUG,
3520 "FILS: Neither ERP EAP-Initiate/Re-auth nor PMKSA cache entry is available - skip FILS");
3521 goto fail;
3522 }
3523
3524 wpa_printf(MSG_DEBUG, "FILS: Try to use FILS (erp=%d pmksa_cache=%d)",
3525 erp_msg != NULL, sm->cur_pmksa != NULL);
3526
3527 sm->fils_completed = 0;
3528
3529 if (!sm->assoc_wpa_ie) {
3530 wpa_printf(MSG_INFO, "FILS: No own RSN IE set for FILS");
3531 goto fail;
3532 }
3533
3534 if (random_get_bytes(sm->fils_nonce, FILS_NONCE_LEN) < 0 ||
3535 random_get_bytes(sm->fils_session, FILS_SESSION_LEN) < 0)
3536 goto fail;
3537
3538 wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Nonce",
3539 sm->fils_nonce, FILS_NONCE_LEN);
3540 wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Session",
3541 sm->fils_session, FILS_SESSION_LEN);
3542
3543 #ifdef CONFIG_FILS_SK_PFS
3544 sm->fils_dh_group = dh_group;
3545 if (dh_group) {
3546 crypto_ecdh_deinit(sm->fils_ecdh);
3547 sm->fils_ecdh = crypto_ecdh_init(dh_group);
3548 if (!sm->fils_ecdh) {
3549 wpa_printf(MSG_INFO,
3550 "FILS: Could not initialize ECDH with group %d",
3551 dh_group);
3552 goto fail;
3553 }
3554 pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1);
3555 if (!pub)
3556 goto fail;
3557 wpa_hexdump_buf(MSG_DEBUG, "FILS: Element (DH public key)",
3558 pub);
3559 sm->fils_dh_elem_len = wpabuf_len(pub);
3560 }
3561 #endif /* CONFIG_FILS_SK_PFS */
3562
3563 buf = wpabuf_alloc(1000 + sm->assoc_wpa_ie_len +
3564 (pub ? wpabuf_len(pub) : 0));
3565 if (!buf)
3566 goto fail;
3567
3568 /* Fields following the Authentication algorithm number field */
3569
3570 /* Authentication Transaction seq# */
3571 wpabuf_put_le16(buf, 1);
3572
3573 /* Status Code */
3574 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
3575
3576 /* TODO: FILS PK */
3577 #ifdef CONFIG_FILS_SK_PFS
3578 if (dh_group) {
3579 /* Finite Cyclic Group */
3580 wpabuf_put_le16(buf, dh_group);
3581 /* Element */
3582 wpabuf_put_buf(buf, pub);
3583 }
3584 #endif /* CONFIG_FILS_SK_PFS */
3585
3586 /* RSNE */
3587 wpa_hexdump(MSG_DEBUG, "FILS: RSNE in FILS Authentication frame",
3588 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
3589 wpabuf_put_data(buf, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
3590
3591 if (md) {
3592 /* MDE when using FILS for FT initial association */
3593 struct rsn_mdie *mdie;
3594
3595 wpabuf_put_u8(buf, WLAN_EID_MOBILITY_DOMAIN);
3596 wpabuf_put_u8(buf, sizeof(*mdie));
3597 mdie = wpabuf_put(buf, sizeof(*mdie));
3598 os_memcpy(mdie->mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
3599 mdie->ft_capab = 0;
3600 }
3601
3602 /* FILS Nonce */
3603 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
3604 wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); /* Length */
3605 /* Element ID Extension */
3606 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE);
3607 wpabuf_put_data(buf, sm->fils_nonce, FILS_NONCE_LEN);
3608
3609 /* FILS Session */
3610 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
3611 wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */
3612 /* Element ID Extension */
3613 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION);
3614 wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN);
3615
3616 /* FILS Wrapped Data */
3617 sm->fils_erp_pmkid_set = 0;
3618 if (erp_msg) {
3619 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
3620 wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); /* Length */
3621 /* Element ID Extension */
3622 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_WRAPPED_DATA);
3623 wpabuf_put_buf(buf, erp_msg);
3624 /* Calculate pending PMKID here so that we do not need to
3625 * maintain a copy of the EAP-Initiate/Reauth message. */
3626 if (fils_pmkid_erp(sm->key_mgmt, wpabuf_head(erp_msg),
3627 wpabuf_len(erp_msg),
3628 sm->fils_erp_pmkid) == 0)
3629 sm->fils_erp_pmkid_set = 1;
3630 }
3631
3632 wpa_hexdump_buf(MSG_DEBUG, "RSN: FILS fields for Authentication frame",
3633 buf);
3634
3635 fail:
3636 wpabuf_free(erp_msg);
3637 wpabuf_free(pub);
3638 return buf;
3639 }
3640
3641
fils_process_auth(struct wpa_sm * sm,const u8 * bssid,const u8 * data,size_t len)3642 int fils_process_auth(struct wpa_sm *sm, const u8 *bssid, const u8 *data,
3643 size_t len)
3644 {
3645 const u8 *pos, *end;
3646 struct ieee802_11_elems elems;
3647 struct wpa_ie_data rsn;
3648 int pmkid_match = 0;
3649 u8 ick[FILS_ICK_MAX_LEN];
3650 size_t ick_len;
3651 int res;
3652 struct wpabuf *dh_ss = NULL;
3653 const u8 *g_sta = NULL;
3654 size_t g_sta_len = 0;
3655 const u8 *g_ap = NULL;
3656 size_t g_ap_len = 0;
3657 struct wpabuf *pub = NULL;
3658
3659 os_memcpy(sm->bssid, bssid, ETH_ALEN);
3660
3661 wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields",
3662 data, len);
3663 pos = data;
3664 end = data + len;
3665
3666 /* TODO: FILS PK */
3667 #ifdef CONFIG_FILS_SK_PFS
3668 if (sm->fils_dh_group) {
3669 u16 group;
3670
3671 /* Using FILS PFS */
3672
3673 /* Finite Cyclic Group */
3674 if (end - pos < 2) {
3675 wpa_printf(MSG_DEBUG,
3676 "FILS: No room for Finite Cyclic Group");
3677 goto fail;
3678 }
3679 group = WPA_GET_LE16(pos);
3680 pos += 2;
3681 if (group != sm->fils_dh_group) {
3682 wpa_printf(MSG_DEBUG,
3683 "FILS: Unexpected change in Finite Cyclic Group: %u (expected %u)",
3684 group, sm->fils_dh_group);
3685 goto fail;
3686 }
3687
3688 /* Element */
3689 if ((size_t) (end - pos) < sm->fils_dh_elem_len) {
3690 wpa_printf(MSG_DEBUG, "FILS: No room for Element");
3691 goto fail;
3692 }
3693
3694 if (!sm->fils_ecdh) {
3695 wpa_printf(MSG_DEBUG, "FILS: No ECDH state available");
3696 goto fail;
3697 }
3698 dh_ss = crypto_ecdh_set_peerkey(sm->fils_ecdh, 1, pos,
3699 sm->fils_dh_elem_len);
3700 if (!dh_ss) {
3701 wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed");
3702 goto fail;
3703 }
3704 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", dh_ss);
3705 g_ap = pos;
3706 g_ap_len = sm->fils_dh_elem_len;
3707 pos += sm->fils_dh_elem_len;
3708 }
3709 #endif /* CONFIG_FILS_SK_PFS */
3710
3711 wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos);
3712 if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) {
3713 wpa_printf(MSG_DEBUG, "FILS: Could not parse elements");
3714 goto fail;
3715 }
3716
3717 /* RSNE */
3718 wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie,
3719 elems.rsn_ie_len);
3720 if (!elems.rsn_ie ||
3721 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
3722 &rsn) < 0) {
3723 wpa_printf(MSG_DEBUG, "FILS: No RSN element");
3724 goto fail;
3725 }
3726
3727 if (!elems.fils_nonce) {
3728 wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field");
3729 goto fail;
3730 }
3731 os_memcpy(sm->fils_anonce, elems.fils_nonce, FILS_NONCE_LEN);
3732 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", sm->fils_anonce, FILS_NONCE_LEN);
3733
3734 #ifdef CONFIG_IEEE80211R
3735 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
3736 struct wpa_ft_ies parse;
3737
3738 if (!elems.mdie || !elems.ftie) {
3739 wpa_printf(MSG_DEBUG, "FILS+FT: No MDE or FTE");
3740 goto fail;
3741 }
3742
3743 if (wpa_ft_parse_ies(pos, end - pos, &parse,
3744 wpa_key_mgmt_sha384(sm->key_mgmt)) < 0) {
3745 wpa_printf(MSG_DEBUG, "FILS+FT: Failed to parse IEs");
3746 goto fail;
3747 }
3748
3749 if (!parse.r0kh_id) {
3750 wpa_printf(MSG_DEBUG,
3751 "FILS+FT: No R0KH-ID subelem in FTE");
3752 goto fail;
3753 }
3754 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
3755 sm->r0kh_id_len = parse.r0kh_id_len;
3756 wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID",
3757 sm->r0kh_id, sm->r0kh_id_len);
3758
3759 if (!parse.r1kh_id) {
3760 wpa_printf(MSG_DEBUG,
3761 "FILS+FT: No R1KH-ID subelem in FTE");
3762 goto fail;
3763 }
3764 os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
3765 wpa_hexdump(MSG_DEBUG, "FILS+FT: R1KH-ID",
3766 sm->r1kh_id, FT_R1KH_ID_LEN);
3767
3768 /* TODO: Check MDE and FTE payload */
3769
3770 wpabuf_free(sm->fils_ft_ies);
3771 sm->fils_ft_ies = wpabuf_alloc(2 + elems.mdie_len +
3772 2 + elems.ftie_len);
3773 if (!sm->fils_ft_ies)
3774 goto fail;
3775 wpabuf_put_data(sm->fils_ft_ies, elems.mdie - 2,
3776 2 + elems.mdie_len);
3777 wpabuf_put_data(sm->fils_ft_ies, elems.ftie - 2,
3778 2 + elems.ftie_len);
3779 } else {
3780 wpabuf_free(sm->fils_ft_ies);
3781 sm->fils_ft_ies = NULL;
3782 }
3783 #endif /* CONFIG_IEEE80211R */
3784
3785 /* PMKID List */
3786 if (rsn.pmkid && rsn.num_pmkid > 0) {
3787 wpa_hexdump(MSG_DEBUG, "FILS: PMKID List",
3788 rsn.pmkid, rsn.num_pmkid * PMKID_LEN);
3789
3790 if (rsn.num_pmkid != 1) {
3791 wpa_printf(MSG_DEBUG, "FILS: Invalid PMKID selection");
3792 goto fail;
3793 }
3794 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", rsn.pmkid, PMKID_LEN);
3795 if (os_memcmp(sm->cur_pmksa->pmkid, rsn.pmkid, PMKID_LEN) != 0)
3796 {
3797 wpa_printf(MSG_DEBUG, "FILS: PMKID mismatch");
3798 wpa_hexdump(MSG_DEBUG, "FILS: Expected PMKID",
3799 sm->cur_pmksa->pmkid, PMKID_LEN);
3800 goto fail;
3801 }
3802 wpa_printf(MSG_DEBUG,
3803 "FILS: Matching PMKID - continue using PMKSA caching");
3804 pmkid_match = 1;
3805 }
3806 if (!pmkid_match && sm->cur_pmksa) {
3807 wpa_printf(MSG_DEBUG,
3808 "FILS: No PMKID match - cannot use cached PMKSA entry");
3809 sm->cur_pmksa = NULL;
3810 }
3811
3812 /* FILS Session */
3813 if (!elems.fils_session) {
3814 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
3815 goto fail;
3816 }
3817 wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session,
3818 FILS_SESSION_LEN);
3819 if (os_memcmp(sm->fils_session, elems.fils_session, FILS_SESSION_LEN)
3820 != 0) {
3821 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
3822 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
3823 sm->fils_session, FILS_SESSION_LEN);
3824 goto fail;
3825 }
3826
3827 /* FILS Wrapped Data */
3828 if (!sm->cur_pmksa && elems.fils_wrapped_data) {
3829 u8 rmsk[ERP_MAX_KEY_LEN];
3830 size_t rmsk_len;
3831
3832 wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data",
3833 elems.fils_wrapped_data,
3834 elems.fils_wrapped_data_len);
3835 eapol_sm_process_erp_finish(sm->eapol, elems.fils_wrapped_data,
3836 elems.fils_wrapped_data_len);
3837 if (eapol_sm_failed(sm->eapol))
3838 goto fail;
3839
3840 rmsk_len = ERP_MAX_KEY_LEN;
3841 res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len);
3842 if (res == PMK_LEN) {
3843 rmsk_len = PMK_LEN;
3844 res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len);
3845 }
3846 if (res)
3847 goto fail;
3848
3849 res = fils_rmsk_to_pmk(sm->key_mgmt, rmsk, rmsk_len,
3850 sm->fils_nonce, sm->fils_anonce,
3851 dh_ss ? wpabuf_head(dh_ss) : NULL,
3852 dh_ss ? wpabuf_len(dh_ss) : 0,
3853 sm->pmk, &sm->pmk_len);
3854 os_memset(rmsk, 0, sizeof(rmsk));
3855
3856 /* Don't use DHss in PTK derivation if PMKSA caching is not
3857 * used. */
3858 wpabuf_clear_free(dh_ss);
3859 dh_ss = NULL;
3860
3861 if (res)
3862 goto fail;
3863
3864 if (!sm->fils_erp_pmkid_set) {
3865 wpa_printf(MSG_DEBUG, "FILS: PMKID not available");
3866 goto fail;
3867 }
3868 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", sm->fils_erp_pmkid,
3869 PMKID_LEN);
3870 wpa_printf(MSG_DEBUG, "FILS: ERP processing succeeded - add PMKSA cache entry for the result");
3871 sm->cur_pmksa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len,
3872 sm->fils_erp_pmkid, NULL, 0,
3873 sm->bssid, sm->own_addr,
3874 sm->network_ctx, sm->key_mgmt,
3875 NULL);
3876 }
3877
3878 if (!sm->cur_pmksa) {
3879 wpa_printf(MSG_DEBUG,
3880 "FILS: No remaining options to continue FILS authentication");
3881 goto fail;
3882 }
3883
3884 if (fils_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, sm->bssid,
3885 sm->fils_nonce, sm->fils_anonce,
3886 dh_ss ? wpabuf_head(dh_ss) : NULL,
3887 dh_ss ? wpabuf_len(dh_ss) : 0,
3888 &sm->ptk, ick, &ick_len,
3889 sm->key_mgmt, sm->pairwise_cipher,
3890 sm->fils_ft, &sm->fils_ft_len) < 0) {
3891 wpa_printf(MSG_DEBUG, "FILS: Failed to derive PTK");
3892 goto fail;
3893 }
3894
3895 wpabuf_clear_free(dh_ss);
3896 dh_ss = NULL;
3897
3898 sm->ptk_set = 1;
3899 sm->tptk_set = 0;
3900 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
3901
3902 #ifdef CONFIG_FILS_SK_PFS
3903 if (sm->fils_dh_group) {
3904 if (!sm->fils_ecdh) {
3905 wpa_printf(MSG_INFO, "FILS: ECDH not initialized");
3906 goto fail;
3907 }
3908 pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1);
3909 if (!pub)
3910 goto fail;
3911 wpa_hexdump_buf(MSG_DEBUG, "FILS: gSTA", pub);
3912 g_sta = wpabuf_head(pub);
3913 g_sta_len = wpabuf_len(pub);
3914 if (!g_ap) {
3915 wpa_printf(MSG_INFO, "FILS: gAP not available");
3916 goto fail;
3917 }
3918 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len);
3919 }
3920 #endif /* CONFIG_FILS_SK_PFS */
3921
3922 res = fils_key_auth_sk(ick, ick_len, sm->fils_nonce,
3923 sm->fils_anonce, sm->own_addr, sm->bssid,
3924 g_sta, g_sta_len, g_ap, g_ap_len,
3925 sm->key_mgmt, sm->fils_key_auth_sta,
3926 sm->fils_key_auth_ap,
3927 &sm->fils_key_auth_len);
3928 wpabuf_free(pub);
3929 os_memset(ick, 0, sizeof(ick));
3930 return res;
3931 fail:
3932 wpabuf_free(pub);
3933 wpabuf_clear_free(dh_ss);
3934 return -1;
3935 }
3936
3937
3938 #ifdef CONFIG_IEEE80211R
fils_ft_build_assoc_req_rsne(struct wpa_sm * sm,struct wpabuf * buf)3939 static int fils_ft_build_assoc_req_rsne(struct wpa_sm *sm, struct wpabuf *buf)
3940 {
3941 struct rsn_ie_hdr *rsnie;
3942 u16 capab;
3943 u8 *pos;
3944 int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt);
3945
3946 /* RSNIE[PMKR0Name/PMKR1Name] */
3947 rsnie = wpabuf_put(buf, sizeof(*rsnie));
3948 rsnie->elem_id = WLAN_EID_RSN;
3949 WPA_PUT_LE16(rsnie->version, RSN_VERSION);
3950
3951 /* Group Suite Selector */
3952 if (!wpa_cipher_valid_group(sm->group_cipher)) {
3953 wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)",
3954 sm->group_cipher);
3955 return -1;
3956 }
3957 pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
3958 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
3959 sm->group_cipher));
3960
3961 /* Pairwise Suite Count */
3962 wpabuf_put_le16(buf, 1);
3963
3964 /* Pairwise Suite List */
3965 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
3966 wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)",
3967 sm->pairwise_cipher);
3968 return -1;
3969 }
3970 pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
3971 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
3972 sm->pairwise_cipher));
3973
3974 /* Authenticated Key Management Suite Count */
3975 wpabuf_put_le16(buf, 1);
3976
3977 /* Authenticated Key Management Suite List */
3978 pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
3979 if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA256)
3980 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256);
3981 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA384)
3982 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384);
3983 else {
3984 wpa_printf(MSG_WARNING,
3985 "FILS+FT: Invalid key management type (%d)",
3986 sm->key_mgmt);
3987 return -1;
3988 }
3989
3990 /* RSN Capabilities */
3991 capab = 0;
3992 #ifdef CONFIG_IEEE80211W
3993 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC)
3994 capab |= WPA_CAPABILITY_MFPC;
3995 #endif /* CONFIG_IEEE80211W */
3996 if (sm->ocv)
3997 capab |= WPA_CAPABILITY_OCVC;
3998 wpabuf_put_le16(buf, capab);
3999
4000 /* PMKID Count */
4001 wpabuf_put_le16(buf, 1);
4002
4003 /* PMKID List [PMKR1Name] */
4004 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: XXKey (FILS-FT)",
4005 sm->fils_ft, sm->fils_ft_len);
4006 wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: SSID", sm->ssid, sm->ssid_len);
4007 wpa_hexdump(MSG_DEBUG, "FILS+FT: MDID",
4008 sm->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
4009 wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID",
4010 sm->r0kh_id, sm->r0kh_id_len);
4011 if (wpa_derive_pmk_r0(sm->fils_ft, sm->fils_ft_len, sm->ssid,
4012 sm->ssid_len, sm->mobility_domain,
4013 sm->r0kh_id, sm->r0kh_id_len, sm->own_addr,
4014 sm->pmk_r0, sm->pmk_r0_name, use_sha384) < 0) {
4015 wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMK-R0");
4016 return -1;
4017 }
4018 sm->pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
4019 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
4020 sm->pmk_r0, sm->pmk_r0_len);
4021 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
4022 sm->pmk_r0_name, WPA_PMK_NAME_LEN);
4023 wpa_printf(MSG_DEBUG, "FILS+FT: R1KH-ID: " MACSTR,
4024 MAC2STR(sm->r1kh_id));
4025 pos = wpabuf_put(buf, WPA_PMK_NAME_LEN);
4026 if (wpa_derive_pmk_r1_name(sm->pmk_r0_name, sm->r1kh_id, sm->own_addr,
4027 sm->pmk_r1_name, use_sha384) < 0) {
4028 wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMKR1Name");
4029 return -1;
4030 }
4031 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
4032 WPA_PMK_NAME_LEN);
4033 os_memcpy(pos, sm->pmk_r1_name, WPA_PMK_NAME_LEN);
4034
4035 #ifdef CONFIG_IEEE80211W
4036 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
4037 /* Management Group Cipher Suite */
4038 pos = wpabuf_put(buf, RSN_SELECTOR_LEN);
4039 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
4040 }
4041 #endif /* CONFIG_IEEE80211W */
4042
4043 rsnie->len = ((u8 *) wpabuf_put(buf, 0) - (u8 *) rsnie) - 2;
4044 return 0;
4045 }
4046 #endif /* CONFIG_IEEE80211R */
4047
4048
fils_build_assoc_req(struct wpa_sm * sm,const u8 ** kek,size_t * kek_len,const u8 ** snonce,const u8 ** anonce,const struct wpabuf ** hlp,unsigned int num_hlp)4049 struct wpabuf * fils_build_assoc_req(struct wpa_sm *sm, const u8 **kek,
4050 size_t *kek_len, const u8 **snonce,
4051 const u8 **anonce,
4052 const struct wpabuf **hlp,
4053 unsigned int num_hlp)
4054 {
4055 struct wpabuf *buf;
4056 size_t len;
4057 unsigned int i;
4058
4059 len = 1000;
4060 #ifdef CONFIG_IEEE80211R
4061 if (sm->fils_ft_ies)
4062 len += wpabuf_len(sm->fils_ft_ies);
4063 if (wpa_key_mgmt_ft(sm->key_mgmt))
4064 len += 256;
4065 #endif /* CONFIG_IEEE80211R */
4066 for (i = 0; hlp && i < num_hlp; i++)
4067 len += 10 + wpabuf_len(hlp[i]);
4068 buf = wpabuf_alloc(len);
4069 if (!buf)
4070 return NULL;
4071
4072 #ifdef CONFIG_IEEE80211R
4073 if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) {
4074 /* MDE and FTE when using FILS+FT */
4075 wpabuf_put_buf(buf, sm->fils_ft_ies);
4076 /* RSNE with PMKR1Name in PMKID field */
4077 if (fils_ft_build_assoc_req_rsne(sm, buf) < 0) {
4078 wpabuf_free(buf);
4079 return NULL;
4080 }
4081 }
4082 #endif /* CONFIG_IEEE80211R */
4083
4084 /* FILS Session */
4085 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
4086 wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */
4087 /* Element ID Extension */
4088 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION);
4089 wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN);
4090
4091 /* Everything after FILS Session element gets encrypted in the driver
4092 * with KEK. The buffer returned from here is the plaintext version. */
4093
4094 /* TODO: FILS Public Key */
4095
4096 /* FILS Key Confirm */
4097 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
4098 wpabuf_put_u8(buf, 1 + sm->fils_key_auth_len); /* Length */
4099 /* Element ID Extension */
4100 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_KEY_CONFIRM);
4101 wpabuf_put_data(buf, sm->fils_key_auth_sta, sm->fils_key_auth_len);
4102
4103 /* FILS HLP Container */
4104 for (i = 0; hlp && i < num_hlp; i++) {
4105 const u8 *pos = wpabuf_head(hlp[i]);
4106 size_t left = wpabuf_len(hlp[i]);
4107
4108 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */
4109 if (left <= 254)
4110 len = 1 + left;
4111 else
4112 len = 255;
4113 wpabuf_put_u8(buf, len); /* Length */
4114 /* Element ID Extension */
4115 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_HLP_CONTAINER);
4116 /* Destination MAC Address, Source MAC Address, HLP Packet.
4117 * HLP Packet is in MSDU format (i.e., included the LLC/SNAP
4118 * header when LPD is used). */
4119 wpabuf_put_data(buf, pos, len - 1);
4120 pos += len - 1;
4121 left -= len - 1;
4122 while (left) {
4123 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT);
4124 len = left > 255 ? 255 : left;
4125 wpabuf_put_u8(buf, len);
4126 wpabuf_put_data(buf, pos, len);
4127 pos += len;
4128 left -= len;
4129 }
4130 }
4131
4132 /* TODO: FILS IP Address Assignment */
4133
4134 #ifdef CONFIG_OCV
4135 if (wpa_sm_ocv_enabled(sm)) {
4136 struct wpa_channel_info ci;
4137 u8 *pos;
4138
4139 if (wpa_sm_channel_info(sm, &ci) != 0) {
4140 wpa_printf(MSG_WARNING,
4141 "FILS: Failed to get channel info for OCI element");
4142 wpabuf_free(buf);
4143 return NULL;
4144 }
4145
4146 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN);
4147 if (ocv_insert_extended_oci(&ci, pos) < 0) {
4148 wpabuf_free(buf);
4149 return NULL;
4150 }
4151 }
4152 #endif /* CONFIG_OCV */
4153
4154 wpa_hexdump_buf(MSG_DEBUG, "FILS: Association Request plaintext", buf);
4155
4156 *kek = sm->ptk.kek;
4157 *kek_len = sm->ptk.kek_len;
4158 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK for AEAD", *kek, *kek_len);
4159 *snonce = sm->fils_nonce;
4160 wpa_hexdump(MSG_DEBUG, "FILS: SNonce for AEAD AAD",
4161 *snonce, FILS_NONCE_LEN);
4162 *anonce = sm->fils_anonce;
4163 wpa_hexdump(MSG_DEBUG, "FILS: ANonce for AEAD AAD",
4164 *anonce, FILS_NONCE_LEN);
4165
4166 return buf;
4167 }
4168
4169
fils_process_hlp_resp(struct wpa_sm * sm,const u8 * resp,size_t len)4170 static void fils_process_hlp_resp(struct wpa_sm *sm, const u8 *resp, size_t len)
4171 {
4172 const u8 *pos, *end;
4173
4174 wpa_hexdump(MSG_MSGDUMP, "FILS: HLP response", resp, len);
4175 if (len < 2 * ETH_ALEN)
4176 return;
4177 pos = resp + 2 * ETH_ALEN;
4178 end = resp + len;
4179 if (end - pos >= 6 &&
4180 os_memcmp(pos, "\xaa\xaa\x03\x00\x00\x00", 6) == 0)
4181 pos += 6; /* Remove SNAP/LLC header */
4182 wpa_sm_fils_hlp_rx(sm, resp, resp + ETH_ALEN, pos, end - pos);
4183 }
4184
4185
fils_process_hlp_container(struct wpa_sm * sm,const u8 * pos,size_t len)4186 static void fils_process_hlp_container(struct wpa_sm *sm, const u8 *pos,
4187 size_t len)
4188 {
4189 const u8 *end = pos + len;
4190 u8 *tmp, *tmp_pos;
4191
4192 /* Check if there are any FILS HLP Container elements */
4193 while (end - pos >= 2) {
4194 if (2 + pos[1] > end - pos)
4195 return;
4196 if (pos[0] == WLAN_EID_EXTENSION &&
4197 pos[1] >= 1 + 2 * ETH_ALEN &&
4198 pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER)
4199 break;
4200 pos += 2 + pos[1];
4201 }
4202 if (end - pos < 2)
4203 return; /* No FILS HLP Container elements */
4204
4205 tmp = os_malloc(end - pos);
4206 if (!tmp)
4207 return;
4208
4209 while (end - pos >= 2) {
4210 if (2 + pos[1] > end - pos ||
4211 pos[0] != WLAN_EID_EXTENSION ||
4212 pos[1] < 1 + 2 * ETH_ALEN ||
4213 pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER)
4214 break;
4215 tmp_pos = tmp;
4216 os_memcpy(tmp_pos, pos + 3, pos[1] - 1);
4217 tmp_pos += pos[1] - 1;
4218 pos += 2 + pos[1];
4219
4220 /* Add possible fragments */
4221 while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT &&
4222 2 + pos[1] <= end - pos) {
4223 os_memcpy(tmp_pos, pos + 2, pos[1]);
4224 tmp_pos += pos[1];
4225 pos += 2 + pos[1];
4226 }
4227
4228 fils_process_hlp_resp(sm, tmp, tmp_pos - tmp);
4229 }
4230
4231 os_free(tmp);
4232 }
4233
4234
fils_process_assoc_resp(struct wpa_sm * sm,const u8 * resp,size_t len)4235 int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len)
4236 {
4237 const struct ieee80211_mgmt *mgmt;
4238 const u8 *end, *ie_start;
4239 struct ieee802_11_elems elems;
4240 int keylen, rsclen;
4241 enum wpa_alg alg;
4242 struct wpa_gtk_data gd;
4243 int maxkeylen;
4244 struct wpa_eapol_ie_parse kde;
4245
4246 if (!sm || !sm->ptk_set) {
4247 wpa_printf(MSG_DEBUG, "FILS: No KEK available");
4248 return -1;
4249 }
4250
4251 if (!wpa_key_mgmt_fils(sm->key_mgmt)) {
4252 wpa_printf(MSG_DEBUG, "FILS: Not a FILS AKM");
4253 return -1;
4254 }
4255
4256 if (sm->fils_completed) {
4257 wpa_printf(MSG_DEBUG,
4258 "FILS: Association has already been completed for this FILS authentication - ignore unexpected retransmission");
4259 return -1;
4260 }
4261
4262 wpa_hexdump(MSG_DEBUG, "FILS: (Re)Association Response frame",
4263 resp, len);
4264
4265 mgmt = (const struct ieee80211_mgmt *) resp;
4266 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp))
4267 return -1;
4268
4269 end = resp + len;
4270 /* Same offset for Association Response and Reassociation Response */
4271 ie_start = mgmt->u.assoc_resp.variable;
4272
4273 if (ieee802_11_parse_elems(ie_start, end - ie_start, &elems, 1) ==
4274 ParseFailed) {
4275 wpa_printf(MSG_DEBUG,
4276 "FILS: Failed to parse decrypted elements");
4277 goto fail;
4278 }
4279
4280 if (!elems.fils_session) {
4281 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
4282 return -1;
4283 }
4284 if (os_memcmp(elems.fils_session, sm->fils_session,
4285 FILS_SESSION_LEN) != 0) {
4286 wpa_printf(MSG_DEBUG, "FILS: FILS Session mismatch");
4287 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
4288 elems.fils_session, FILS_SESSION_LEN);
4289 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
4290 sm->fils_session, FILS_SESSION_LEN);
4291 }
4292
4293 /* TODO: FILS Public Key */
4294
4295 if (!elems.fils_key_confirm) {
4296 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
4297 goto fail;
4298 }
4299 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
4300 wpa_printf(MSG_DEBUG,
4301 "FILS: Unexpected Key-Auth length %d (expected %d)",
4302 elems.fils_key_confirm_len,
4303 (int) sm->fils_key_auth_len);
4304 goto fail;
4305 }
4306 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_ap,
4307 sm->fils_key_auth_len) != 0) {
4308 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
4309 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
4310 elems.fils_key_confirm,
4311 elems.fils_key_confirm_len);
4312 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
4313 sm->fils_key_auth_ap, sm->fils_key_auth_len);
4314 goto fail;
4315 }
4316
4317 #ifdef CONFIG_OCV
4318 if (wpa_sm_ocv_enabled(sm)) {
4319 struct wpa_channel_info ci;
4320
4321 if (wpa_sm_channel_info(sm, &ci) != 0) {
4322 wpa_printf(MSG_WARNING,
4323 "Failed to get channel info to validate received OCI in FILS (Re)Association Response frame");
4324 goto fail;
4325 }
4326
4327 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci,
4328 channel_width_to_int(ci.chanwidth),
4329 ci.seg1_idx) != 0) {
4330 wpa_printf(MSG_WARNING, "FILS: %s", ocv_errorstr);
4331 goto fail;
4332 }
4333 }
4334 #endif /* CONFIG_OCV */
4335
4336 #ifdef CONFIG_IEEE80211R
4337 if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) {
4338 struct wpa_ie_data rsn;
4339
4340 /* Check that PMKR1Name derived by the AP matches */
4341 if (!elems.rsn_ie ||
4342 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
4343 &rsn) < 0 ||
4344 !rsn.pmkid || rsn.num_pmkid != 1 ||
4345 os_memcmp(rsn.pmkid, sm->pmk_r1_name,
4346 WPA_PMK_NAME_LEN) != 0) {
4347 wpa_printf(MSG_DEBUG,
4348 "FILS+FT: No RSNE[PMKR1Name] match in AssocResp");
4349 goto fail;
4350 }
4351 }
4352 #endif /* CONFIG_IEEE80211R */
4353
4354 /* Key Delivery */
4355 if (!elems.key_delivery) {
4356 wpa_printf(MSG_DEBUG, "FILS: No Key Delivery element");
4357 goto fail;
4358 }
4359
4360 /* Parse GTK and set the key to the driver */
4361 os_memset(&gd, 0, sizeof(gd));
4362 if (wpa_supplicant_parse_ies(elems.key_delivery + WPA_KEY_RSC_LEN,
4363 elems.key_delivery_len - WPA_KEY_RSC_LEN,
4364 &kde) < 0) {
4365 wpa_printf(MSG_DEBUG, "FILS: Failed to parse KDEs");
4366 goto fail;
4367 }
4368 if (!kde.gtk) {
4369 wpa_printf(MSG_DEBUG, "FILS: No GTK KDE");
4370 goto fail;
4371 }
4372 maxkeylen = gd.gtk_len = kde.gtk_len - 2;
4373 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
4374 gd.gtk_len, maxkeylen,
4375 &gd.key_rsc_len, &gd.alg))
4376 goto fail;
4377
4378 wpa_hexdump_key(MSG_DEBUG, "FILS: Received GTK", kde.gtk, kde.gtk_len);
4379 gd.keyidx = kde.gtk[0] & 0x3;
4380 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
4381 !!(kde.gtk[0] & BIT(2)));
4382 if (kde.gtk_len - 2 > sizeof(gd.gtk)) {
4383 wpa_printf(MSG_DEBUG, "FILS: Too long GTK in GTK KDE (len=%lu)",
4384 (unsigned long) kde.gtk_len - 2);
4385 goto fail;
4386 }
4387 os_memcpy(gd.gtk, kde.gtk + 2, kde.gtk_len - 2);
4388
4389 wpa_printf(MSG_DEBUG, "FILS: Set GTK to driver");
4390 if (wpa_supplicant_install_gtk(sm, &gd, elems.key_delivery, 0) < 0) {
4391 wpa_printf(MSG_DEBUG, "FILS: Failed to set GTK");
4392 goto fail;
4393 }
4394
4395 if (ieee80211w_set_keys(sm, &kde) < 0) {
4396 wpa_printf(MSG_DEBUG, "FILS: Failed to set IGTK");
4397 goto fail;
4398 }
4399
4400 alg = wpa_cipher_to_alg(sm->pairwise_cipher);
4401 keylen = wpa_cipher_key_len(sm->pairwise_cipher);
4402 if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) {
4403 wpa_printf(MSG_DEBUG, "FILS: TK length mismatch: %u != %lu",
4404 keylen, (long unsigned int) sm->ptk.tk_len);
4405 goto fail;
4406 }
4407 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher);
4408 wpa_hexdump_key(MSG_DEBUG, "FILS: Set TK to driver",
4409 sm->ptk.tk, keylen);
4410 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, null_rsc, rsclen,
4411 sm->ptk.tk, keylen) < 0) {
4412 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
4413 "FILS: Failed to set PTK to the driver (alg=%d keylen=%d bssid="
4414 MACSTR ")",
4415 alg, keylen, MAC2STR(sm->bssid));
4416 goto fail;
4417 }
4418
4419 /* TODO: TK could be cleared after auth frame exchange now that driver
4420 * takes care of association frame encryption/decryption. */
4421 /* TK is not needed anymore in supplicant */
4422 os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN);
4423 sm->ptk.tk_len = 0;
4424 sm->ptk.installed = 1;
4425
4426 /* FILS HLP Container */
4427 fils_process_hlp_container(sm, ie_start, end - ie_start);
4428
4429 /* TODO: FILS IP Address Assignment */
4430
4431 wpa_printf(MSG_DEBUG, "FILS: Auth+Assoc completed successfully");
4432 sm->fils_completed = 1;
4433
4434 return 0;
4435 fail:
4436 return -1;
4437 }
4438
4439
wpa_sm_set_reset_fils_completed(struct wpa_sm * sm,int set)4440 void wpa_sm_set_reset_fils_completed(struct wpa_sm *sm, int set)
4441 {
4442 if (sm)
4443 sm->fils_completed = !!set;
4444 }
4445
4446 #endif /* CONFIG_FILS */
4447
4448
wpa_fils_is_completed(struct wpa_sm * sm)4449 int wpa_fils_is_completed(struct wpa_sm *sm)
4450 {
4451 #ifdef CONFIG_FILS
4452 return sm && sm->fils_completed;
4453 #else /* CONFIG_FILS */
4454 return 0;
4455 #endif /* CONFIG_FILS */
4456 }
4457
4458
4459 #ifdef CONFIG_OWE
4460
owe_build_assoc_req(struct wpa_sm * sm,u16 group)4461 struct wpabuf * owe_build_assoc_req(struct wpa_sm *sm, u16 group)
4462 {
4463 struct wpabuf *ie = NULL, *pub = NULL;
4464 size_t prime_len;
4465
4466 if (group == 19)
4467 prime_len = 32;
4468 else if (group == 20)
4469 prime_len = 48;
4470 else if (group == 21)
4471 prime_len = 66;
4472 else
4473 return NULL;
4474
4475 crypto_ecdh_deinit(sm->owe_ecdh);
4476 sm->owe_ecdh = crypto_ecdh_init(group);
4477 if (!sm->owe_ecdh)
4478 goto fail;
4479 sm->owe_group = group;
4480 pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0);
4481 pub = wpabuf_zeropad(pub, prime_len);
4482 if (!pub)
4483 goto fail;
4484
4485 ie = wpabuf_alloc(5 + wpabuf_len(pub));
4486 if (!ie)
4487 goto fail;
4488 wpabuf_put_u8(ie, WLAN_EID_EXTENSION);
4489 wpabuf_put_u8(ie, 1 + 2 + wpabuf_len(pub));
4490 wpabuf_put_u8(ie, WLAN_EID_EXT_OWE_DH_PARAM);
4491 wpabuf_put_le16(ie, group);
4492 wpabuf_put_buf(ie, pub);
4493 wpabuf_free(pub);
4494 wpa_hexdump_buf(MSG_DEBUG, "OWE: Diffie-Hellman Parameter element",
4495 ie);
4496
4497 return ie;
4498 fail:
4499 wpabuf_free(pub);
4500 crypto_ecdh_deinit(sm->owe_ecdh);
4501 sm->owe_ecdh = NULL;
4502 return NULL;
4503 }
4504
4505
owe_process_assoc_resp(struct wpa_sm * sm,const u8 * bssid,const u8 * resp_ies,size_t resp_ies_len)4506 int owe_process_assoc_resp(struct wpa_sm *sm, const u8 *bssid,
4507 const u8 *resp_ies, size_t resp_ies_len)
4508 {
4509 struct ieee802_11_elems elems;
4510 u16 group;
4511 struct wpabuf *secret, *pub, *hkey;
4512 int res;
4513 u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN];
4514 const char *info = "OWE Key Generation";
4515 const u8 *addr[2];
4516 size_t len[2];
4517 size_t hash_len, prime_len;
4518 struct wpa_ie_data data;
4519
4520 if (!resp_ies ||
4521 ieee802_11_parse_elems(resp_ies, resp_ies_len, &elems, 1) ==
4522 ParseFailed) {
4523 wpa_printf(MSG_INFO,
4524 "OWE: Could not parse Association Response frame elements");
4525 return -1;
4526 }
4527
4528 if (sm->cur_pmksa && elems.rsn_ie &&
4529 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 2 + elems.rsn_ie_len,
4530 &data) == 0 &&
4531 data.num_pmkid == 1 && data.pmkid &&
4532 os_memcmp(sm->cur_pmksa->pmkid, data.pmkid, PMKID_LEN) == 0) {
4533 wpa_printf(MSG_DEBUG, "OWE: Use PMKSA caching");
4534 wpa_sm_set_pmk_from_pmksa(sm);
4535 return 0;
4536 }
4537
4538 if (!elems.owe_dh) {
4539 wpa_printf(MSG_INFO,
4540 "OWE: No Diffie-Hellman Parameter element found in Association Response frame");
4541 return -1;
4542 }
4543
4544 group = WPA_GET_LE16(elems.owe_dh);
4545 if (group != sm->owe_group) {
4546 wpa_printf(MSG_INFO,
4547 "OWE: Unexpected Diffie-Hellman group in response: %u",
4548 group);
4549 return -1;
4550 }
4551
4552 if (!sm->owe_ecdh) {
4553 wpa_printf(MSG_INFO, "OWE: No ECDH state available");
4554 return -1;
4555 }
4556
4557 if (group == 19)
4558 prime_len = 32;
4559 else if (group == 20)
4560 prime_len = 48;
4561 else if (group == 21)
4562 prime_len = 66;
4563 else
4564 return -1;
4565
4566 secret = crypto_ecdh_set_peerkey(sm->owe_ecdh, 0,
4567 elems.owe_dh + 2,
4568 elems.owe_dh_len - 2);
4569 secret = wpabuf_zeropad(secret, prime_len);
4570 if (!secret) {
4571 wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key");
4572 return -1;
4573 }
4574 wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret);
4575
4576 /* prk = HKDF-extract(C | A | group, z) */
4577
4578 pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0);
4579 if (!pub) {
4580 wpabuf_clear_free(secret);
4581 return -1;
4582 }
4583
4584 /* PMKID = Truncate-128(Hash(C | A)) */
4585 addr[0] = wpabuf_head(pub);
4586 len[0] = wpabuf_len(pub);
4587 addr[1] = elems.owe_dh + 2;
4588 len[1] = elems.owe_dh_len - 2;
4589 if (group == 19) {
4590 res = sha256_vector(2, addr, len, pmkid);
4591 hash_len = SHA256_MAC_LEN;
4592 } else if (group == 20) {
4593 res = sha384_vector(2, addr, len, pmkid);
4594 hash_len = SHA384_MAC_LEN;
4595 } else if (group == 21) {
4596 res = sha512_vector(2, addr, len, pmkid);
4597 hash_len = SHA512_MAC_LEN;
4598 } else {
4599 res = -1;
4600 hash_len = 0;
4601 }
4602 pub = wpabuf_zeropad(pub, prime_len);
4603 if (res < 0 || !pub) {
4604 wpabuf_free(pub);
4605 wpabuf_clear_free(secret);
4606 return -1;
4607 }
4608
4609 hkey = wpabuf_alloc(wpabuf_len(pub) + elems.owe_dh_len - 2 + 2);
4610 if (!hkey) {
4611 wpabuf_free(pub);
4612 wpabuf_clear_free(secret);
4613 return -1;
4614 }
4615
4616 wpabuf_put_buf(hkey, pub); /* C */
4617 wpabuf_free(pub);
4618 wpabuf_put_data(hkey, elems.owe_dh + 2, elems.owe_dh_len - 2); /* A */
4619 wpabuf_put_le16(hkey, sm->owe_group); /* group */
4620 if (group == 19)
4621 res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey),
4622 wpabuf_head(secret), wpabuf_len(secret), prk);
4623 else if (group == 20)
4624 res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey),
4625 wpabuf_head(secret), wpabuf_len(secret), prk);
4626 else if (group == 21)
4627 res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey),
4628 wpabuf_head(secret), wpabuf_len(secret), prk);
4629 wpabuf_clear_free(hkey);
4630 wpabuf_clear_free(secret);
4631 if (res < 0)
4632 return -1;
4633
4634 wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len);
4635
4636 /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
4637
4638 if (group == 19)
4639 res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info,
4640 os_strlen(info), sm->pmk, hash_len);
4641 else if (group == 20)
4642 res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info,
4643 os_strlen(info), sm->pmk, hash_len);
4644 else if (group == 21)
4645 res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info,
4646 os_strlen(info), sm->pmk, hash_len);
4647 os_memset(prk, 0, SHA512_MAC_LEN);
4648 if (res < 0) {
4649 sm->pmk_len = 0;
4650 return -1;
4651 }
4652 sm->pmk_len = hash_len;
4653
4654 wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sm->pmk, sm->pmk_len);
4655 wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN);
4656 pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, pmkid, NULL, 0,
4657 bssid, sm->own_addr, sm->network_ctx, sm->key_mgmt,
4658 NULL);
4659
4660 return 0;
4661 }
4662
4663 #endif /* CONFIG_OWE */
4664
4665
wpa_sm_set_fils_cache_id(struct wpa_sm * sm,const u8 * fils_cache_id)4666 void wpa_sm_set_fils_cache_id(struct wpa_sm *sm, const u8 *fils_cache_id)
4667 {
4668 #ifdef CONFIG_FILS
4669 if (sm && fils_cache_id) {
4670 sm->fils_cache_id_set = 1;
4671 os_memcpy(sm->fils_cache_id, fils_cache_id, FILS_CACHE_ID_LEN);
4672 }
4673 #endif /* CONFIG_FILS */
4674 }
4675
4676
4677 #ifdef CONFIG_DPP2
wpa_sm_set_dpp_z(struct wpa_sm * sm,const struct wpabuf * z)4678 void wpa_sm_set_dpp_z(struct wpa_sm *sm, const struct wpabuf *z)
4679 {
4680 if (sm) {
4681 wpabuf_clear_free(sm->dpp_z);
4682 sm->dpp_z = z ? wpabuf_dup(z) : NULL;
4683 }
4684 }
4685 #endif /* CONFIG_DPP2 */
4686