]> git.ipfire.org Git - thirdparty/hostap.git/blame - hostapd/wpa_auth_ie.c
projects / thirdparty / hostap.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Fixed opportunistic key caching (OKC)
[thirdparty/hostap.git] / hostapd / wpa_auth_ie.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd - WPA/RSN IE and KDE definitions
3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16
17#include "common.h"
18#include "config.h"
19#include "ieee802_11.h"
20#include "eapol_sm.h"
21#include "wpa.h"
22#include "pmksa_cache.h"
23#include "wpa_auth_ie.h"
24#include "wpa_auth_i.h"
25
26
27static int wpa_write_wpa_ie(struct wpa_auth_config *conf, u8 *buf, size_t len)
28{
29 struct wpa_ie_hdr *hdr;
30 int num_suites;
31 u8 *pos, *count;
32
33 hdr = (struct wpa_ie_hdr *) buf;
34 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
35 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
36 WPA_PUT_LE16(hdr->version, WPA_VERSION);
37 pos = (u8 *) (hdr + 1);
38
39 if (conf->wpa_group == WPA_CIPHER_CCMP) {
40 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
41 } else if (conf->wpa_group == WPA_CIPHER_TKIP) {
42 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
43 } else if (conf->wpa_group == WPA_CIPHER_WEP104) {
44 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP104);
45 } else if (conf->wpa_group == WPA_CIPHER_WEP40) {
46 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP40);
47 } else {
48 wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).",
49 conf->wpa_group);
50 return -1;
51 }
52 pos += WPA_SELECTOR_LEN;
53
54 num_suites = 0;
55 count = pos;
56 pos += 2;
57
58 if (conf->wpa_pairwise & WPA_CIPHER_CCMP) {
59 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
60 pos += WPA_SELECTOR_LEN;
61 num_suites++;
62 }
63 if (conf->wpa_pairwise & WPA_CIPHER_TKIP) {
64 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
65 pos += WPA_SELECTOR_LEN;
66 num_suites++;
67 }
68 if (conf->wpa_pairwise & WPA_CIPHER_NONE) {
69 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
70 pos += WPA_SELECTOR_LEN;
71 num_suites++;
72 }
73
74 if (num_suites == 0) {
75 wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).",
76 conf->wpa_pairwise);
77 return -1;
78 }
79 WPA_PUT_LE16(count, num_suites);
80
81 num_suites = 0;
82 count = pos;
83 pos += 2;
84
85 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
86 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
87 pos += WPA_SELECTOR_LEN;
88 num_suites++;
89 }
90 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
91 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
92 pos += WPA_SELECTOR_LEN;
93 num_suites++;
94 }
95
96 if (num_suites == 0) {
97 wpa_printf(MSG_DEBUG, "Invalid key management type (%d).",
98 conf->wpa_key_mgmt);
99 return -1;
100 }
101 WPA_PUT_LE16(count, num_suites);
102
103 /* WPA Capabilities; use defaults, so no need to include it */
104
105 hdr->len = (pos - buf) - 2;
106
107 return pos - buf;
108}
109
110
111int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len,
112 const u8 *pmkid)
113{
114 struct rsn_ie_hdr *hdr;
115 int num_suites;
116 u8 *pos, *count;
117 u16 capab;
118
119 hdr = (struct rsn_ie_hdr *) buf;
120 hdr->elem_id = WLAN_EID_RSN;
121 WPA_PUT_LE16(hdr->version, RSN_VERSION);
122 pos = (u8 *) (hdr + 1);
123
124 if (conf->wpa_group == WPA_CIPHER_CCMP) {
125 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
126 } else if (conf->wpa_group == WPA_CIPHER_TKIP) {
127 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
128 } else if (conf->wpa_group == WPA_CIPHER_WEP104) {
129 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP104);
130 } else if (conf->wpa_group == WPA_CIPHER_WEP40) {
131 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP40);
132 } else {
133 wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).",
134 conf->wpa_group);
135 return -1;
136 }
137 pos += RSN_SELECTOR_LEN;
138
139 num_suites = 0;
140 count = pos;
141 pos += 2;
142
143 if (conf->rsn_pairwise & WPA_CIPHER_CCMP) {
144 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
145 pos += RSN_SELECTOR_LEN;
146 num_suites++;
147 }
148 if (conf->rsn_pairwise & WPA_CIPHER_TKIP) {
149 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
150 pos += RSN_SELECTOR_LEN;
151 num_suites++;
152 }
153 if (conf->rsn_pairwise & WPA_CIPHER_NONE) {
154 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
155 pos += RSN_SELECTOR_LEN;
156 num_suites++;
157 }
158
159 if (num_suites == 0) {
160 wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).",
161 conf->rsn_pairwise);
162 return -1;
163 }
164 WPA_PUT_LE16(count, num_suites);
165
166 num_suites = 0;
167 count = pos;
168 pos += 2;
169
170 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
171 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
172 pos += RSN_SELECTOR_LEN;
173 num_suites++;
174 }
175 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
176 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
177 pos += RSN_SELECTOR_LEN;
178 num_suites++;
179 }
180#ifdef CONFIG_IEEE80211R
181 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) {
182 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
183 pos += RSN_SELECTOR_LEN;
184 num_suites++;
185 }
186 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) {
187 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
188 pos += RSN_SELECTOR_LEN;
189 num_suites++;
190 }
191#endif /* CONFIG_IEEE80211R */
192
193 if (num_suites == 0) {
194 wpa_printf(MSG_DEBUG, "Invalid key management type (%d).",
195 conf->wpa_key_mgmt);
196 return -1;
197 }
198 WPA_PUT_LE16(count, num_suites);
199
200 /* RSN Capabilities */
201 capab = 0;
202 if (conf->rsn_preauth)
203 capab |= WPA_CAPABILITY_PREAUTH;
204 if (conf->peerkey)
205 capab |= WPA_CAPABILITY_PEERKEY_ENABLED;
206 if (conf->wme_enabled) {
207 /* 4 PTKSA replay counters when using WME */
208 capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2);
209 }
210#ifdef CONFIG_IEEE80211W
211 if (conf->ieee80211w != WPA_NO_IEEE80211W)
212 capab |= WPA_CAPABILITY_MGMT_FRAME_PROTECTION;
213#endif /* CONFIG_IEEE80211W */
214 WPA_PUT_LE16(pos, capab);
215 pos += 2;
216
217 if (pmkid) {
218 if (pos + 2 + PMKID_LEN > buf + len)
219 return -1;
220 /* PMKID Count */
221 WPA_PUT_LE16(pos, 1);
222 pos += 2;
223 os_memcpy(pos, pmkid, PMKID_LEN);
224 pos += PMKID_LEN;
225 }
226
227#ifdef CONFIG_IEEE80211W
228 if (conf->ieee80211w != WPA_NO_IEEE80211W) {
229 if (pos + 2 + 4 > buf + len)
230 return -1;
231 if (pmkid == NULL) {
232 /* PMKID Count */
233 WPA_PUT_LE16(pos, 0);
234 pos += 2;
235 }
236
237 /* Management Group Cipher Suite */
238 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
239 pos += RSN_SELECTOR_LEN;
240 }
241#endif /* CONFIG_IEEE80211W */
242
243 hdr->len = (pos - buf) - 2;
244
245 return pos - buf;
246}
247
248
249int wpa_auth_gen_wpa_ie(struct wpa_authenticator *wpa_auth)
250{
251 u8 *pos, buf[128];
252 int res;
253
254 pos = buf;
255
256 if (wpa_auth->conf.wpa & WPA_PROTO_RSN) {
257 res = wpa_write_rsn_ie(&wpa_auth->conf,
258 pos, buf + sizeof(buf) - pos, NULL);
259 if (res < 0)
260 return res;
261 pos += res;
262 }
263#ifdef CONFIG_IEEE80211R
264 if (wpa_auth->conf.wpa_key_mgmt &
265 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) {
266 res = wpa_write_mdie(&wpa_auth->conf, pos,
267 buf + sizeof(buf) - pos);
268 if (res < 0)
269 return res;
270 pos += res;
271 }
272#endif /* CONFIG_IEEE80211R */
273 if (wpa_auth->conf.wpa & WPA_PROTO_WPA) {
274 res = wpa_write_wpa_ie(&wpa_auth->conf,
275 pos, buf + sizeof(buf) - pos);
276 if (res < 0)
277 return res;
278 pos += res;
279 }
280
281 os_free(wpa_auth->wpa_ie);
282 wpa_auth->wpa_ie = os_malloc(pos - buf);
283 if (wpa_auth->wpa_ie == NULL)
284 return -1;
285 os_memcpy(wpa_auth->wpa_ie, buf, pos - buf);
286 wpa_auth->wpa_ie_len = pos - buf;
287
288 return 0;
289}
290
291
292u8 * wpa_add_kde(u8 *pos, u32 kde, const u8 *data, size_t data_len,
293 const u8 *data2, size_t data2_len)
294{
295 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
296 *pos++ = RSN_SELECTOR_LEN + data_len + data2_len;
297 RSN_SELECTOR_PUT(pos, kde);
298 pos += RSN_SELECTOR_LEN;
299 os_memcpy(pos, data, data_len);
300 pos += data_len;
301 if (data2) {
302 os_memcpy(pos, data2, data2_len);
303 pos += data2_len;
304 }
305 return pos;
306}
307
308
309static int wpa_selector_to_bitfield(const u8 *s)
310{
311 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
312 return WPA_CIPHER_NONE;
313 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
314 return WPA_CIPHER_WEP40;
315 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
316 return WPA_CIPHER_TKIP;
317 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
318 return WPA_CIPHER_CCMP;
319 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
320 return WPA_CIPHER_WEP104;
321 return 0;
322}
323
324
325static int wpa_key_mgmt_to_bitfield(const u8 *s)
326{
327 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
328 return WPA_KEY_MGMT_IEEE8021X;
329 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
330 return WPA_KEY_MGMT_PSK;
331 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
332 return WPA_KEY_MGMT_WPA_NONE;
333 return 0;
334}
335
336
337static int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
338 struct wpa_ie_data *data)
339{
340 const struct wpa_ie_hdr *hdr;
341 const u8 *pos;
342 int left;
343 int i, count;
344
345 os_memset(data, 0, sizeof(*data));
346 data->pairwise_cipher = WPA_CIPHER_TKIP;
347 data->group_cipher = WPA_CIPHER_TKIP;
348 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
349 data->mgmt_group_cipher = 0;
350
351 if (wpa_ie_len < sizeof(struct wpa_ie_hdr))
352 return -1;
353
354 hdr = (const struct wpa_ie_hdr *) wpa_ie;
355
356 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
357 hdr->len != wpa_ie_len - 2 ||
358 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
359 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
360 return -2;
361 }
362
363 pos = (const u8 *) (hdr + 1);
364 left = wpa_ie_len - sizeof(*hdr);
365
366 if (left >= WPA_SELECTOR_LEN) {
367 data->group_cipher = wpa_selector_to_bitfield(pos);
368 pos += WPA_SELECTOR_LEN;
369 left -= WPA_SELECTOR_LEN;
370 } else if (left > 0)
371 return -3;
372
373 if (left >= 2) {
374 data->pairwise_cipher = 0;
375 count = WPA_GET_LE16(pos);
376 pos += 2;
377 left -= 2;
378 if (count == 0 || left < count * WPA_SELECTOR_LEN)
379 return -4;
380 for (i = 0; i < count; i++) {
381 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
382 pos += WPA_SELECTOR_LEN;
383 left -= WPA_SELECTOR_LEN;
384 }
385 } else if (left == 1)
386 return -5;
387
388 if (left >= 2) {
389 data->key_mgmt = 0;
390 count = WPA_GET_LE16(pos);
391 pos += 2;
392 left -= 2;
393 if (count == 0 || left < count * WPA_SELECTOR_LEN)
394 return -6;
395 for (i = 0; i < count; i++) {
396 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
397 pos += WPA_SELECTOR_LEN;
398 left -= WPA_SELECTOR_LEN;
399 }
400 } else if (left == 1)
401 return -7;
402
403 if (left >= 2) {
404 data->capabilities = WPA_GET_LE16(pos);
405 pos += 2;
406 left -= 2;
407 }
408
409 if (left > 0) {
410 return -8;
411 }
412
413 return 0;
414}
415
416
417int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
418 struct wpa_state_machine *sm,
419 const u8 *wpa_ie, size_t wpa_ie_len,
420 const u8 *mdie, size_t mdie_len)
421{
422 struct wpa_ie_data data;
423 int ciphers, key_mgmt, res, version;
424 u32 selector;
425 size_t i;
426
427 if (wpa_auth == NULL || sm == NULL)
428 return WPA_NOT_ENABLED;
429
430 if (wpa_ie == NULL || wpa_ie_len < 1)
431 return WPA_INVALID_IE;
432
433 if (wpa_ie[0] == WLAN_EID_RSN)
434 version = WPA_PROTO_RSN;
435 else
436 version = WPA_PROTO_WPA;
437
438 if (version == WPA_PROTO_RSN) {
439 res = wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, &data);
440
441 selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
442 if (0) {
443 }
444#ifdef CONFIG_IEEE80211R
445 else if (data.key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
446 selector = RSN_AUTH_KEY_MGMT_FT_802_1X;
447 else if (data.key_mgmt & WPA_KEY_MGMT_FT_PSK)
448 selector = RSN_AUTH_KEY_MGMT_FT_PSK;
449#endif /* CONFIG_IEEE80211R */
450 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
451 selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
452 else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
453 selector = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
454 wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
455
456 selector = RSN_CIPHER_SUITE_CCMP;
457 if (data.pairwise_cipher & WPA_CIPHER_CCMP)
458 selector = RSN_CIPHER_SUITE_CCMP;
459 else if (data.pairwise_cipher & WPA_CIPHER_TKIP)
460 selector = RSN_CIPHER_SUITE_TKIP;
461 else if (data.pairwise_cipher & WPA_CIPHER_WEP104)
462 selector = RSN_CIPHER_SUITE_WEP104;
463 else if (data.pairwise_cipher & WPA_CIPHER_WEP40)
464 selector = RSN_CIPHER_SUITE_WEP40;
465 else if (data.pairwise_cipher & WPA_CIPHER_NONE)
466 selector = RSN_CIPHER_SUITE_NONE;
467 wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
468
469 selector = RSN_CIPHER_SUITE_CCMP;
470 if (data.group_cipher & WPA_CIPHER_CCMP)
471 selector = RSN_CIPHER_SUITE_CCMP;
472 else if (data.group_cipher & WPA_CIPHER_TKIP)
473 selector = RSN_CIPHER_SUITE_TKIP;
474 else if (data.group_cipher & WPA_CIPHER_WEP104)
475 selector = RSN_CIPHER_SUITE_WEP104;
476 else if (data.group_cipher & WPA_CIPHER_WEP40)
477 selector = RSN_CIPHER_SUITE_WEP40;
478 else if (data.group_cipher & WPA_CIPHER_NONE)
479 selector = RSN_CIPHER_SUITE_NONE;
480 wpa_auth->dot11RSNAGroupCipherSelected = selector;
481 } else {
482 res = wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, &data);
483
484 selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
485 if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
486 selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
487 else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
488 selector = WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X;
489 wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
490
491 selector = WPA_CIPHER_SUITE_TKIP;
492 if (data.pairwise_cipher & WPA_CIPHER_CCMP)
493 selector = WPA_CIPHER_SUITE_CCMP;
494 else if (data.pairwise_cipher & WPA_CIPHER_TKIP)
495 selector = WPA_CIPHER_SUITE_TKIP;
496 else if (data.pairwise_cipher & WPA_CIPHER_WEP104)
497 selector = WPA_CIPHER_SUITE_WEP104;
498 else if (data.pairwise_cipher & WPA_CIPHER_WEP40)
499 selector = WPA_CIPHER_SUITE_WEP40;
500 else if (data.pairwise_cipher & WPA_CIPHER_NONE)
501 selector = WPA_CIPHER_SUITE_NONE;
502 wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
503
504 selector = WPA_CIPHER_SUITE_TKIP;
505 if (data.group_cipher & WPA_CIPHER_CCMP)
506 selector = WPA_CIPHER_SUITE_CCMP;
507 else if (data.group_cipher & WPA_CIPHER_TKIP)
508 selector = WPA_CIPHER_SUITE_TKIP;
509 else if (data.group_cipher & WPA_CIPHER_WEP104)
510 selector = WPA_CIPHER_SUITE_WEP104;
511 else if (data.group_cipher & WPA_CIPHER_WEP40)
512 selector = WPA_CIPHER_SUITE_WEP40;
513 else if (data.group_cipher & WPA_CIPHER_NONE)
514 selector = WPA_CIPHER_SUITE_NONE;
515 wpa_auth->dot11RSNAGroupCipherSelected = selector;
516 }
517 if (res) {
518 wpa_printf(MSG_DEBUG, "Failed to parse WPA/RSN IE from "
519 MACSTR " (res=%d)", MAC2STR(sm->addr), res);
520 wpa_hexdump(MSG_DEBUG, "WPA/RSN IE", wpa_ie, wpa_ie_len);
521 return WPA_INVALID_IE;
522 }
523
524 if (data.group_cipher != wpa_auth->conf.wpa_group) {
525 wpa_printf(MSG_DEBUG, "Invalid WPA group cipher (0x%x) from "
526 MACSTR, data.group_cipher, MAC2STR(sm->addr));
527 return WPA_INVALID_GROUP;
528 }
529
530 key_mgmt = data.key_mgmt & wpa_auth->conf.wpa_key_mgmt;
531 if (!key_mgmt) {
532 wpa_printf(MSG_DEBUG, "Invalid WPA key mgmt (0x%x) from "
533 MACSTR, data.key_mgmt, MAC2STR(sm->addr));
534 return WPA_INVALID_AKMP;
535 }
536 if (0) {
537 }
538#ifdef CONFIG_IEEE80211R
539 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
540 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
541 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
542 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
543#endif /* CONFIG_IEEE80211R */
544 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X)
545 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X;
546 else
547 sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
548
549 if (version == WPA_PROTO_RSN)
550 ciphers = data.pairwise_cipher & wpa_auth->conf.rsn_pairwise;
551 else
552 ciphers = data.pairwise_cipher & wpa_auth->conf.wpa_pairwise;
553 if (!ciphers) {
554 wpa_printf(MSG_DEBUG, "Invalid %s pairwise cipher (0x%x) "
555 "from " MACSTR,
556 version == WPA_PROTO_RSN ? "RSN" : "WPA",
557 data.pairwise_cipher, MAC2STR(sm->addr));
558 return WPA_INVALID_PAIRWISE;
559 }
560
561#ifdef CONFIG_IEEE80211W
562 if (wpa_auth->conf.ieee80211w == WPA_IEEE80211W_REQUIRED) {
563 if (!(data.capabilities &
564 WPA_CAPABILITY_MGMT_FRAME_PROTECTION)) {
565 wpa_printf(MSG_DEBUG, "Management frame protection "
566 "required, but client did not enable it");
567 return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
568 }
569
570 if (ciphers & WPA_CIPHER_TKIP) {
571 wpa_printf(MSG_DEBUG, "Management frame protection "
572 "cannot use TKIP");
573 return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
574 }
575
576 if (data.mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) {
577 wpa_printf(MSG_DEBUG, "Unsupported management group "
578 "cipher %d", data.mgmt_group_cipher);
579 return WPA_INVALID_MGMT_GROUP_CIPHER;
580 }
581 }
582
583 if (wpa_auth->conf.ieee80211w == WPA_NO_IEEE80211W ||
584 !(data.capabilities & WPA_CAPABILITY_MGMT_FRAME_PROTECTION))
585 sm->mgmt_frame_prot = 0;
586 else
587 sm->mgmt_frame_prot = 1;
588#endif /* CONFIG_IEEE80211W */
589
590#ifdef CONFIG_IEEE80211R
591 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X ||
592 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK) {
593 if (mdie == NULL || mdie_len < MOBILITY_DOMAIN_ID_LEN + 1) {
594 wpa_printf(MSG_DEBUG, "RSN: Trying to use FT, but "
595 "MDIE not included");
596 return WPA_INVALID_MDIE;
597 }
598 if (os_memcmp(mdie, wpa_auth->conf.mobility_domain,
599 MOBILITY_DOMAIN_ID_LEN) != 0) {
600 wpa_hexdump(MSG_DEBUG, "RSN: Attempted to use unknown "
601 "MDIE", mdie, MOBILITY_DOMAIN_ID_LEN);
602 return WPA_INVALID_MDIE;
603 }
604 }
605#endif /* CONFIG_IEEE80211R */
606
607 if (ciphers & WPA_CIPHER_CCMP)
608 sm->pairwise = WPA_CIPHER_CCMP;
609 else
610 sm->pairwise = WPA_CIPHER_TKIP;
611
612 /* TODO: clear WPA/WPA2 state if STA changes from one to another */
613 if (wpa_ie[0] == WLAN_EID_RSN)
614 sm->wpa = WPA_VERSION_WPA2;
615 else
616 sm->wpa = WPA_VERSION_WPA;
617
618 for (i = 0; i < data.num_pmkid; i++) {
619 wpa_hexdump(MSG_DEBUG, "RSN IE: STA PMKID",
620 &data.pmkid[i * PMKID_LEN], PMKID_LEN);
621 sm->pmksa = pmksa_cache_get(wpa_auth->pmksa, sm->addr,
622 &data.pmkid[i * PMKID_LEN]);
623 if (sm->pmksa) {
624 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
625 "PMKID found from PMKSA cache "
626 "eap_type=%d vlan_id=%d",
627 sm->pmksa->eap_type_authsrv,
628 sm->pmksa->vlan_id);
629 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed,
630 sm->pmksa->pmkid, PMKID_LEN);
631 break;
632 }
633 }
634
635 if (sm->wpa_ie == NULL || sm->wpa_ie_len < wpa_ie_len) {
636 os_free(sm->wpa_ie);
637 sm->wpa_ie = os_malloc(wpa_ie_len);
638 if (sm->wpa_ie == NULL)
639 return WPA_ALLOC_FAIL;
640 }
641 os_memcpy(sm->wpa_ie, wpa_ie, wpa_ie_len);
642 sm->wpa_ie_len = wpa_ie_len;
643
644 return WPA_IE_OK;
645}
646
647
648/**
649 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
650 * @pos: Pointer to the IE header
651 * @end: Pointer to the end of the Key Data buffer
652 * @ie: Pointer to parsed IE data
653 * Returns: 0 on success, 1 if end mark is found, -1 on failure
654 */
655static int wpa_parse_generic(const u8 *pos, const u8 *end,
656 struct wpa_eapol_ie_parse *ie)
657{
658 if (pos[1] == 0)
659 return 1;
660
661 if (pos[1] >= 6 &&
662 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
663 pos[2 + WPA_SELECTOR_LEN] == 1 &&
664 pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
665 ie->wpa_ie = pos;
666 ie->wpa_ie_len = pos[1] + 2;
667 return 0;
668 }
669
670 if (pos + 1 + RSN_SELECTOR_LEN < end &&
671 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
672 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
673 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
674 return 0;
675 }
676
677 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
678 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
679 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
680 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
681 return 0;
682 }
683
684 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
685 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
686 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
687 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
688 return 0;
689 }
690
691#ifdef CONFIG_PEERKEY
692 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
693 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
694 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
695 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
696 return 0;
697 }
698
699 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
700 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
701 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
702 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
703 return 0;
704 }
705
706 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
707 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
708 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
709 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
710 return 0;
711 }
712
713 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
714 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
715 ie->error = pos + 2 + RSN_SELECTOR_LEN;
716 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
717 return 0;
718 }
719#endif /* CONFIG_PEERKEY */
720
721#ifdef CONFIG_IEEE80211W
722 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
723 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
724 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
725 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
726 return 0;
727 }
728#endif /* CONFIG_IEEE80211W */
729
730 return 0;
731}
732
733
734/**
735 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs
736 * @buf: Pointer to the Key Data buffer
737 * @len: Key Data Length
738 * @ie: Pointer to parsed IE data
739 * Returns: 0 on success, -1 on failure
740 */
741int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie)
742{
743 const u8 *pos, *end;
744 int ret = 0;
745
746 os_memset(ie, 0, sizeof(*ie));
747 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
748 if (pos[0] == 0xdd &&
749 ((pos == buf + len - 1) || pos[1] == 0)) {
750 /* Ignore padding */
751 break;
752 }
753 if (pos + 2 + pos[1] > end) {
754 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
755 "underflow (ie=%d len=%d pos=%d)",
756 pos[0], pos[1], (int) (pos - buf));
757 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
758 buf, len);
759 ret = -1;
760 break;
761 }
762 if (*pos == WLAN_EID_RSN) {
763 ie->rsn_ie = pos;
764 ie->rsn_ie_len = pos[1] + 2;
765#ifdef CONFIG_IEEE80211R
766 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
767 ie->mdie = pos;
768 ie->mdie_len = pos[1] + 2;
769#endif /* CONFIG_IEEE80211R */
770 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
771 ret = wpa_parse_generic(pos, end, ie);
772 if (ret < 0)
773 break;
774 if (ret > 0) {
775 ret = 0;
776 break;
777 }
778 } else {
779 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
780 "Key Data IE", pos, 2 + pos[1]);
781 }
782 }
783
784 return ret;
785}
f3f7540e
JM		 786
787
788int wpa_auth_uses_mfp(struct wpa_state_machine *sm)
789{
790 return sm ? sm->mgmt_frame_prot : 0;
791}
Unnamed repository; edit this file 'description' to name the repository.