1 /*
2 * hostapd - WPA/RSN IE and KDE definitions
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "common/ieee802_11_defs.h"
13 #include "eapol_auth/eapol_auth_sm.h"
14 #include "ap_config.h"
15 #include "ieee802_11.h"
16 #include "wpa_auth.h"
17 #include "pmksa_cache_auth.h"
18 #include "wpa_auth_ie.h"
19 #include "wpa_auth_i.h"
20
21
22 #ifdef CONFIG_RSN_TESTING
23 int rsn_testing = 0;
24 #endif /* CONFIG_RSN_TESTING */
25
26
wpa_write_wpa_ie(struct wpa_auth_config * conf,u8 * buf,size_t len)27 static 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 u32 suite;
33
34 hdr = (struct wpa_ie_hdr *) buf;
35 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
36 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
37 WPA_PUT_LE16(hdr->version, WPA_VERSION);
38 pos = (u8 *) (hdr + 1);
39
40 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, conf->wpa_group);
41 if (suite == 0) {
42 wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).",
43 conf->wpa_group);
44 return -1;
45 }
46 RSN_SELECTOR_PUT(pos, suite);
47 pos += WPA_SELECTOR_LEN;
48
49 count = pos;
50 pos += 2;
51
52 num_suites = wpa_cipher_put_suites(pos, conf->wpa_pairwise);
53 if (num_suites == 0) {
54 wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).",
55 conf->wpa_pairwise);
56 return -1;
57 }
58 pos += num_suites * WPA_SELECTOR_LEN;
59 WPA_PUT_LE16(count, num_suites);
60
61 num_suites = 0;
62 count = pos;
63 pos += 2;
64
65 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
66 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
67 pos += WPA_SELECTOR_LEN;
68 num_suites++;
69 }
70 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
71 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
72 pos += WPA_SELECTOR_LEN;
73 num_suites++;
74 }
75
76 if (num_suites == 0) {
77 wpa_printf(MSG_DEBUG, "Invalid key management type (%d).",
78 conf->wpa_key_mgmt);
79 return -1;
80 }
81 WPA_PUT_LE16(count, num_suites);
82
83 /* WPA Capabilities; use defaults, so no need to include it */
84
85 hdr->len = (pos - buf) - 2;
86
87 return pos - buf;
88 }
89
90
wpa_write_rsn_ie(struct wpa_auth_config * conf,u8 * buf,size_t len,const u8 * pmkid)91 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len,
92 const u8 *pmkid)
93 {
94 struct rsn_ie_hdr *hdr;
95 int num_suites, res;
96 u8 *pos, *count;
97 u16 capab;
98 u32 suite;
99
100 hdr = (struct rsn_ie_hdr *) buf;
101 hdr->elem_id = WLAN_EID_RSN;
102 WPA_PUT_LE16(hdr->version, RSN_VERSION);
103 pos = (u8 *) (hdr + 1);
104
105 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, conf->wpa_group);
106 if (suite == 0) {
107 wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).",
108 conf->wpa_group);
109 return -1;
110 }
111 RSN_SELECTOR_PUT(pos, suite);
112 pos += RSN_SELECTOR_LEN;
113
114 num_suites = 0;
115 count = pos;
116 pos += 2;
117
118 #ifdef CONFIG_RSN_TESTING
119 if (rsn_testing) {
120 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 1));
121 pos += RSN_SELECTOR_LEN;
122 num_suites++;
123 }
124 #endif /* CONFIG_RSN_TESTING */
125
126 res = rsn_cipher_put_suites(pos, conf->rsn_pairwise);
127 num_suites += res;
128 pos += res * RSN_SELECTOR_LEN;
129
130 #ifdef CONFIG_RSN_TESTING
131 if (rsn_testing) {
132 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 2));
133 pos += RSN_SELECTOR_LEN;
134 num_suites++;
135 }
136 #endif /* CONFIG_RSN_TESTING */
137
138 if (num_suites == 0) {
139 wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).",
140 conf->rsn_pairwise);
141 return -1;
142 }
143 WPA_PUT_LE16(count, num_suites);
144
145 num_suites = 0;
146 count = pos;
147 pos += 2;
148
149 #ifdef CONFIG_RSN_TESTING
150 if (rsn_testing) {
151 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 1));
152 pos += RSN_SELECTOR_LEN;
153 num_suites++;
154 }
155 #endif /* CONFIG_RSN_TESTING */
156
157 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
158 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
159 pos += RSN_SELECTOR_LEN;
160 num_suites++;
161 }
162 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
163 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
164 pos += RSN_SELECTOR_LEN;
165 num_suites++;
166 }
167 #ifdef CONFIG_IEEE80211R
168 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) {
169 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
170 pos += RSN_SELECTOR_LEN;
171 num_suites++;
172 }
173 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) {
174 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
175 pos += RSN_SELECTOR_LEN;
176 num_suites++;
177 }
178 #endif /* CONFIG_IEEE80211R */
179 #ifdef CONFIG_IEEE80211W
180 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) {
181 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
182 pos += RSN_SELECTOR_LEN;
183 num_suites++;
184 }
185 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK_SHA256) {
186 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
187 pos += RSN_SELECTOR_LEN;
188 num_suites++;
189 }
190 #endif /* CONFIG_IEEE80211W */
191 #ifdef CONFIG_SAE
192 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_SAE) {
193 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
194 pos += RSN_SELECTOR_LEN;
195 num_suites++;
196 }
197 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_SAE) {
198 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
199 pos += RSN_SELECTOR_LEN;
200 num_suites++;
201 }
202 #endif /* CONFIG_SAE */
203 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B) {
204 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B);
205 pos += RSN_SELECTOR_LEN;
206 num_suites++;
207 }
208 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
209 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192);
210 pos += RSN_SELECTOR_LEN;
211 num_suites++;
212 }
213
214 #ifdef CONFIG_RSN_TESTING
215 if (rsn_testing) {
216 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 2));
217 pos += RSN_SELECTOR_LEN;
218 num_suites++;
219 }
220 #endif /* CONFIG_RSN_TESTING */
221
222 if (num_suites == 0) {
223 wpa_printf(MSG_DEBUG, "Invalid key management type (%d).",
224 conf->wpa_key_mgmt);
225 return -1;
226 }
227 WPA_PUT_LE16(count, num_suites);
228
229 /* RSN Capabilities */
230 capab = 0;
231 if (conf->rsn_preauth)
232 capab |= WPA_CAPABILITY_PREAUTH;
233 if (conf->peerkey)
234 capab |= WPA_CAPABILITY_PEERKEY_ENABLED;
235 if (conf->wmm_enabled) {
236 /* 4 PTKSA replay counters when using WMM */
237 capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2);
238 }
239 #ifdef CONFIG_IEEE80211W
240 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
241 capab |= WPA_CAPABILITY_MFPC;
242 if (conf->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED)
243 capab |= WPA_CAPABILITY_MFPR;
244 }
245 #endif /* CONFIG_IEEE80211W */
246 #ifdef CONFIG_RSN_TESTING
247 if (rsn_testing)
248 capab |= BIT(8) | BIT(14) | BIT(15);
249 #endif /* CONFIG_RSN_TESTING */
250 WPA_PUT_LE16(pos, capab);
251 pos += 2;
252
253 if (pmkid) {
254 if (pos + 2 + PMKID_LEN > buf + len)
255 return -1;
256 /* PMKID Count */
257 WPA_PUT_LE16(pos, 1);
258 pos += 2;
259 os_memcpy(pos, pmkid, PMKID_LEN);
260 pos += PMKID_LEN;
261 }
262
263 #ifdef CONFIG_IEEE80211W
264 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
265 if (pos + 2 + 4 > buf + len)
266 return -1;
267 if (pmkid == NULL) {
268 /* PMKID Count */
269 WPA_PUT_LE16(pos, 0);
270 pos += 2;
271 }
272
273 /* Management Group Cipher Suite */
274 switch (conf->group_mgmt_cipher) {
275 case WPA_CIPHER_AES_128_CMAC:
276 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
277 break;
278 case WPA_CIPHER_BIP_GMAC_128:
279 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_GMAC_128);
280 break;
281 case WPA_CIPHER_BIP_GMAC_256:
282 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_GMAC_256);
283 break;
284 case WPA_CIPHER_BIP_CMAC_256:
285 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_CMAC_256);
286 break;
287 default:
288 wpa_printf(MSG_DEBUG,
289 "Invalid group management cipher (0x%x)",
290 conf->group_mgmt_cipher);
291 return -1;
292 }
293 pos += RSN_SELECTOR_LEN;
294 }
295 #endif /* CONFIG_IEEE80211W */
296
297 #ifdef CONFIG_RSN_TESTING
298 if (rsn_testing) {
299 /*
300 * Fill in any defined fields and add extra data to the end of
301 * the element.
302 */
303 int pmkid_count_set = pmkid != NULL;
304 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION)
305 pmkid_count_set = 1;
306 /* PMKID Count */
307 WPA_PUT_LE16(pos, 0);
308 pos += 2;
309 if (conf->ieee80211w == NO_MGMT_FRAME_PROTECTION) {
310 /* Management Group Cipher Suite */
311 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
312 pos += RSN_SELECTOR_LEN;
313 }
314
315 os_memset(pos, 0x12, 17);
316 pos += 17;
317 }
318 #endif /* CONFIG_RSN_TESTING */
319
320 hdr->len = (pos - buf) - 2;
321
322 return pos - buf;
323 }
324
325
wpa_write_osen(struct wpa_auth_config * conf,u8 * eid)326 static u8 * wpa_write_osen(struct wpa_auth_config *conf, u8 *eid)
327 {
328 u8 *len;
329 u16 capab;
330
331 *eid++ = WLAN_EID_VENDOR_SPECIFIC;
332 len = eid++; /* to be filled */
333 WPA_PUT_BE24(eid, OUI_WFA);
334 eid += 3;
335 *eid++ = HS20_OSEN_OUI_TYPE;
336
337 /* Group Data Cipher Suite */
338 RSN_SELECTOR_PUT(eid, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
339 eid += RSN_SELECTOR_LEN;
340
341 /* Pairwise Cipher Suite Count and List */
342 WPA_PUT_LE16(eid, 1);
343 eid += 2;
344 RSN_SELECTOR_PUT(eid, RSN_CIPHER_SUITE_CCMP);
345 eid += RSN_SELECTOR_LEN;
346
347 /* AKM Suite Count and List */
348 WPA_PUT_LE16(eid, 1);
349 eid += 2;
350 RSN_SELECTOR_PUT(eid, RSN_AUTH_KEY_MGMT_OSEN);
351 eid += RSN_SELECTOR_LEN;
352
353 /* RSN Capabilities */
354 capab = 0;
355 if (conf->wmm_enabled) {
356 /* 4 PTKSA replay counters when using WMM */
357 capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2);
358 }
359 #ifdef CONFIG_IEEE80211W
360 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
361 capab |= WPA_CAPABILITY_MFPC;
362 if (conf->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED)
363 capab |= WPA_CAPABILITY_MFPR;
364 }
365 #endif /* CONFIG_IEEE80211W */
366 WPA_PUT_LE16(eid, capab);
367 eid += 2;
368
369 *len = eid - len - 1;
370
371 return eid;
372 }
373
374
wpa_auth_gen_wpa_ie(struct wpa_authenticator * wpa_auth)375 int wpa_auth_gen_wpa_ie(struct wpa_authenticator *wpa_auth)
376 {
377 u8 *pos, buf[128];
378 int res;
379
380 pos = buf;
381
382 if (wpa_auth->conf.wpa == WPA_PROTO_OSEN) {
383 pos = wpa_write_osen(&wpa_auth->conf, pos);
384 }
385 if (wpa_auth->conf.wpa & WPA_PROTO_RSN) {
386 res = wpa_write_rsn_ie(&wpa_auth->conf,
387 pos, buf + sizeof(buf) - pos, NULL);
388 if (res < 0)
389 return res;
390 pos += res;
391 }
392 #ifdef CONFIG_IEEE80211R
393 if (wpa_key_mgmt_ft(wpa_auth->conf.wpa_key_mgmt)) {
394 res = wpa_write_mdie(&wpa_auth->conf, pos,
395 buf + sizeof(buf) - pos);
396 if (res < 0)
397 return res;
398 pos += res;
399 }
400 #endif /* CONFIG_IEEE80211R */
401 if (wpa_auth->conf.wpa & WPA_PROTO_WPA) {
402 res = wpa_write_wpa_ie(&wpa_auth->conf,
403 pos, buf + sizeof(buf) - pos);
404 if (res < 0)
405 return res;
406 pos += res;
407 }
408
409 os_free(wpa_auth->wpa_ie);
410 wpa_auth->wpa_ie = os_malloc(pos - buf);
411 if (wpa_auth->wpa_ie == NULL)
412 return -1;
413 os_memcpy(wpa_auth->wpa_ie, buf, pos - buf);
414 wpa_auth->wpa_ie_len = pos - buf;
415
416 return 0;
417 }
418
419
wpa_add_kde(u8 * pos,u32 kde,const u8 * data,size_t data_len,const u8 * data2,size_t data2_len)420 u8 * wpa_add_kde(u8 *pos, u32 kde, const u8 *data, size_t data_len,
421 const u8 *data2, size_t data2_len)
422 {
423 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
424 *pos++ = RSN_SELECTOR_LEN + data_len + data2_len;
425 RSN_SELECTOR_PUT(pos, kde);
426 pos += RSN_SELECTOR_LEN;
427 os_memcpy(pos, data, data_len);
428 pos += data_len;
429 if (data2) {
430 os_memcpy(pos, data2, data2_len);
431 pos += data2_len;
432 }
433 return pos;
434 }
435
436
437 struct wpa_auth_okc_iter_data {
438 struct rsn_pmksa_cache_entry *pmksa;
439 const u8 *aa;
440 const u8 *spa;
441 const u8 *pmkid;
442 };
443
444
wpa_auth_okc_iter(struct wpa_authenticator * a,void * ctx)445 static int wpa_auth_okc_iter(struct wpa_authenticator *a, void *ctx)
446 {
447 struct wpa_auth_okc_iter_data *data = ctx;
448 data->pmksa = pmksa_cache_get_okc(a->pmksa, data->aa, data->spa,
449 data->pmkid);
450 if (data->pmksa)
451 return 1;
452 return 0;
453 }
454
455
wpa_validate_wpa_ie(struct wpa_authenticator * wpa_auth,struct wpa_state_machine * sm,const u8 * wpa_ie,size_t wpa_ie_len,const u8 * mdie,size_t mdie_len)456 int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
457 struct wpa_state_machine *sm,
458 const u8 *wpa_ie, size_t wpa_ie_len,
459 const u8 *mdie, size_t mdie_len)
460 {
461 struct wpa_ie_data data;
462 int ciphers, key_mgmt, res, version;
463 u32 selector;
464 size_t i;
465 const u8 *pmkid = NULL;
466
467 if (wpa_auth == NULL || sm == NULL)
468 return WPA_NOT_ENABLED;
469
470 if (wpa_ie == NULL || wpa_ie_len < 1)
471 return WPA_INVALID_IE;
472
473 if (wpa_ie[0] == WLAN_EID_RSN)
474 version = WPA_PROTO_RSN;
475 else
476 version = WPA_PROTO_WPA;
477
478 if (!(wpa_auth->conf.wpa & version)) {
479 wpa_printf(MSG_DEBUG, "Invalid WPA proto (%d) from " MACSTR,
480 version, MAC2STR(sm->addr));
481 return WPA_INVALID_PROTO;
482 }
483
484 if (version == WPA_PROTO_RSN) {
485 res = wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, &data);
486
487 selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
488 if (0) {
489 }
490 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
491 selector = RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
492 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
493 selector = RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
494 #ifdef CONFIG_IEEE80211R
495 else if (data.key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
496 selector = RSN_AUTH_KEY_MGMT_FT_802_1X;
497 else if (data.key_mgmt & WPA_KEY_MGMT_FT_PSK)
498 selector = RSN_AUTH_KEY_MGMT_FT_PSK;
499 #endif /* CONFIG_IEEE80211R */
500 #ifdef CONFIG_IEEE80211W
501 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
502 selector = RSN_AUTH_KEY_MGMT_802_1X_SHA256;
503 else if (data.key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
504 selector = RSN_AUTH_KEY_MGMT_PSK_SHA256;
505 #endif /* CONFIG_IEEE80211W */
506 #ifdef CONFIG_SAE
507 else if (data.key_mgmt & WPA_KEY_MGMT_SAE)
508 selector = RSN_AUTH_KEY_MGMT_SAE;
509 else if (data.key_mgmt & WPA_KEY_MGMT_FT_SAE)
510 selector = RSN_AUTH_KEY_MGMT_FT_SAE;
511 #endif /* CONFIG_SAE */
512 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
513 selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
514 else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
515 selector = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
516 wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
517
518 selector = wpa_cipher_to_suite(WPA_PROTO_RSN,
519 data.pairwise_cipher);
520 if (!selector)
521 selector = RSN_CIPHER_SUITE_CCMP;
522 wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
523
524 selector = wpa_cipher_to_suite(WPA_PROTO_RSN,
525 data.group_cipher);
526 if (!selector)
527 selector = RSN_CIPHER_SUITE_CCMP;
528 wpa_auth->dot11RSNAGroupCipherSelected = selector;
529 } else {
530 res = wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, &data);
531
532 selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
533 if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
534 selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
535 else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
536 selector = WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X;
537 wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
538
539 selector = wpa_cipher_to_suite(WPA_PROTO_WPA,
540 data.pairwise_cipher);
541 if (!selector)
542 selector = RSN_CIPHER_SUITE_TKIP;
543 wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
544
545 selector = wpa_cipher_to_suite(WPA_PROTO_WPA,
546 data.group_cipher);
547 if (!selector)
548 selector = WPA_CIPHER_SUITE_TKIP;
549 wpa_auth->dot11RSNAGroupCipherSelected = selector;
550 }
551 if (res) {
552 wpa_printf(MSG_DEBUG, "Failed to parse WPA/RSN IE from "
553 MACSTR " (res=%d)", MAC2STR(sm->addr), res);
554 wpa_hexdump(MSG_DEBUG, "WPA/RSN IE", wpa_ie, wpa_ie_len);
555 return WPA_INVALID_IE;
556 }
557
558 if (data.group_cipher != wpa_auth->conf.wpa_group) {
559 wpa_printf(MSG_DEBUG, "Invalid WPA group cipher (0x%x) from "
560 MACSTR, data.group_cipher, MAC2STR(sm->addr));
561 return WPA_INVALID_GROUP;
562 }
563
564 key_mgmt = data.key_mgmt & wpa_auth->conf.wpa_key_mgmt;
565 if (!key_mgmt) {
566 wpa_printf(MSG_DEBUG, "Invalid WPA key mgmt (0x%x) from "
567 MACSTR, data.key_mgmt, MAC2STR(sm->addr));
568 return WPA_INVALID_AKMP;
569 }
570 if (0) {
571 }
572 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
573 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
574 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
575 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_SUITE_B;
576 #ifdef CONFIG_IEEE80211R
577 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
578 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
579 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
580 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
581 #endif /* CONFIG_IEEE80211R */
582 #ifdef CONFIG_IEEE80211W
583 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
584 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
585 else if (key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
586 sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
587 #endif /* CONFIG_IEEE80211W */
588 #ifdef CONFIG_SAE
589 else if (key_mgmt & WPA_KEY_MGMT_SAE)
590 sm->wpa_key_mgmt = WPA_KEY_MGMT_SAE;
591 else if (key_mgmt & WPA_KEY_MGMT_FT_SAE)
592 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_SAE;
593 #endif /* CONFIG_SAE */
594 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X)
595 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X;
596 else
597 sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
598
599 if (version == WPA_PROTO_RSN)
600 ciphers = data.pairwise_cipher & wpa_auth->conf.rsn_pairwise;
601 else
602 ciphers = data.pairwise_cipher & wpa_auth->conf.wpa_pairwise;
603 if (!ciphers) {
604 wpa_printf(MSG_DEBUG, "Invalid %s pairwise cipher (0x%x) "
605 "from " MACSTR,
606 version == WPA_PROTO_RSN ? "RSN" : "WPA",
607 data.pairwise_cipher, MAC2STR(sm->addr));
608 return WPA_INVALID_PAIRWISE;
609 }
610
611 #ifdef CONFIG_IEEE80211W
612 if (wpa_auth->conf.ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
613 if (!(data.capabilities & WPA_CAPABILITY_MFPC)) {
614 wpa_printf(MSG_DEBUG, "Management frame protection "
615 "required, but client did not enable it");
616 return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
617 }
618
619 if (ciphers & WPA_CIPHER_TKIP) {
620 wpa_printf(MSG_DEBUG, "Management frame protection "
621 "cannot use TKIP");
622 return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
623 }
624
625 if (data.mgmt_group_cipher != wpa_auth->conf.group_mgmt_cipher)
626 {
627 wpa_printf(MSG_DEBUG, "Unsupported management group "
628 "cipher %d", data.mgmt_group_cipher);
629 return WPA_INVALID_MGMT_GROUP_CIPHER;
630 }
631 }
632
633 if (wpa_auth->conf.ieee80211w == NO_MGMT_FRAME_PROTECTION ||
634 !(data.capabilities & WPA_CAPABILITY_MFPC))
635 sm->mgmt_frame_prot = 0;
636 else
637 sm->mgmt_frame_prot = 1;
638 #endif /* CONFIG_IEEE80211W */
639
640 #ifdef CONFIG_IEEE80211R
641 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
642 if (mdie == NULL || mdie_len < MOBILITY_DOMAIN_ID_LEN + 1) {
643 wpa_printf(MSG_DEBUG, "RSN: Trying to use FT, but "
644 "MDIE not included");
645 return WPA_INVALID_MDIE;
646 }
647 if (os_memcmp(mdie, wpa_auth->conf.mobility_domain,
648 MOBILITY_DOMAIN_ID_LEN) != 0) {
649 wpa_hexdump(MSG_DEBUG, "RSN: Attempted to use unknown "
650 "MDIE", mdie, MOBILITY_DOMAIN_ID_LEN);
651 return WPA_INVALID_MDIE;
652 }
653 }
654 #endif /* CONFIG_IEEE80211R */
655
656 sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0);
657 if (sm->pairwise < 0)
658 return WPA_INVALID_PAIRWISE;
659
660 /* TODO: clear WPA/WPA2 state if STA changes from one to another */
661 if (wpa_ie[0] == WLAN_EID_RSN)
662 sm->wpa = WPA_VERSION_WPA2;
663 else
664 sm->wpa = WPA_VERSION_WPA;
665
666 sm->pmksa = NULL;
667 for (i = 0; i < data.num_pmkid; i++) {
668 wpa_hexdump(MSG_DEBUG, "RSN IE: STA PMKID",
669 &data.pmkid[i * PMKID_LEN], PMKID_LEN);
670 sm->pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sm->addr,
671 &data.pmkid[i * PMKID_LEN]);
672 if (sm->pmksa) {
673 pmkid = sm->pmksa->pmkid;
674 break;
675 }
676 }
677 for (i = 0; sm->pmksa == NULL && wpa_auth->conf.okc &&
678 i < data.num_pmkid; i++) {
679 struct wpa_auth_okc_iter_data idata;
680 idata.pmksa = NULL;
681 idata.aa = wpa_auth->addr;
682 idata.spa = sm->addr;
683 idata.pmkid = &data.pmkid[i * PMKID_LEN];
684 wpa_auth_for_each_auth(wpa_auth, wpa_auth_okc_iter, &idata);
685 if (idata.pmksa) {
686 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
687 "OKC match for PMKID");
688 sm->pmksa = pmksa_cache_add_okc(wpa_auth->pmksa,
689 idata.pmksa,
690 wpa_auth->addr,
691 idata.pmkid);
692 pmkid = idata.pmkid;
693 break;
694 }
695 }
696 if (sm->pmksa && pmkid) {
697 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
698 "PMKID found from PMKSA cache "
699 "eap_type=%d vlan_id=%d",
700 sm->pmksa->eap_type_authsrv,
701 sm->pmksa->vlan_id);
702 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmkid, PMKID_LEN);
703 }
704
705 if (sm->wpa_ie == NULL || sm->wpa_ie_len < wpa_ie_len) {
706 os_free(sm->wpa_ie);
707 sm->wpa_ie = os_malloc(wpa_ie_len);
708 if (sm->wpa_ie == NULL)
709 return WPA_ALLOC_FAIL;
710 }
711 os_memcpy(sm->wpa_ie, wpa_ie, wpa_ie_len);
712 sm->wpa_ie_len = wpa_ie_len;
713
714 return WPA_IE_OK;
715 }
716
717
718 #ifdef CONFIG_HS20
wpa_validate_osen(struct wpa_authenticator * wpa_auth,struct wpa_state_machine * sm,const u8 * osen_ie,size_t osen_ie_len)719 int wpa_validate_osen(struct wpa_authenticator *wpa_auth,
720 struct wpa_state_machine *sm,
721 const u8 *osen_ie, size_t osen_ie_len)
722 {
723 if (wpa_auth == NULL || sm == NULL)
724 return -1;
725
726 /* TODO: parse OSEN element */
727 sm->wpa_key_mgmt = WPA_KEY_MGMT_OSEN;
728 sm->mgmt_frame_prot = 1;
729 sm->pairwise = WPA_CIPHER_CCMP;
730 sm->wpa = WPA_VERSION_WPA2;
731
732 if (sm->wpa_ie == NULL || sm->wpa_ie_len < osen_ie_len) {
733 os_free(sm->wpa_ie);
734 sm->wpa_ie = os_malloc(osen_ie_len);
735 if (sm->wpa_ie == NULL)
736 return -1;
737 }
738
739 os_memcpy(sm->wpa_ie, osen_ie, osen_ie_len);
740 sm->wpa_ie_len = osen_ie_len;
741
742 return 0;
743 }
744
745 #endif /* CONFIG_HS20 */
746
747
748 /**
749 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
750 * @pos: Pointer to the IE header
751 * @end: Pointer to the end of the Key Data buffer
752 * @ie: Pointer to parsed IE data
753 * Returns: 0 on success, 1 if end mark is found, -1 on failure
754 */
wpa_parse_generic(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)755 static int wpa_parse_generic(const u8 *pos, const u8 *end,
756 struct wpa_eapol_ie_parse *ie)
757 {
758 if (pos[1] == 0)
759 return 1;
760
761 if (pos[1] >= 6 &&
762 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
763 pos[2 + WPA_SELECTOR_LEN] == 1 &&
764 pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
765 ie->wpa_ie = pos;
766 ie->wpa_ie_len = pos[1] + 2;
767 return 0;
768 }
769
770 if (pos[1] >= 4 && WPA_GET_BE32(pos + 2) == OSEN_IE_VENDOR_TYPE) {
771 ie->osen = pos;
772 ie->osen_len = pos[1] + 2;
773 return 0;
774 }
775
776 if (pos + 1 + RSN_SELECTOR_LEN < end &&
777 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
778 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
779 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
780 return 0;
781 }
782
783 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
784 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
785 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
786 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
787 return 0;
788 }
789
790 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
791 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
792 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
793 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
794 return 0;
795 }
796
797 #ifdef CONFIG_PEERKEY
798 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
799 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
800 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
801 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
802 return 0;
803 }
804
805 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
806 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
807 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
808 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
809 return 0;
810 }
811
812 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
813 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
814 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
815 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
816 return 0;
817 }
818
819 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
820 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
821 ie->error = pos + 2 + RSN_SELECTOR_LEN;
822 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
823 return 0;
824 }
825 #endif /* CONFIG_PEERKEY */
826
827 #ifdef CONFIG_IEEE80211W
828 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
829 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
830 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
831 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
832 return 0;
833 }
834 #endif /* CONFIG_IEEE80211W */
835
836 #ifdef CONFIG_P2P
837 if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
838 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
839 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
840 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
841 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
842 return 0;
843 }
844
845 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
846 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
847 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
848 wpa_hexdump(MSG_DEBUG,
849 "WPA: IP Address Allocation in EAPOL-Key",
850 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
851 return 0;
852 }
853 #endif /* CONFIG_P2P */
854
855 return 0;
856 }
857
858
859 /**
860 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs
861 * @buf: Pointer to the Key Data buffer
862 * @len: Key Data Length
863 * @ie: Pointer to parsed IE data
864 * Returns: 0 on success, -1 on failure
865 */
wpa_parse_kde_ies(const u8 * buf,size_t len,struct wpa_eapol_ie_parse * ie)866 int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie)
867 {
868 const u8 *pos, *end;
869 int ret = 0;
870
871 os_memset(ie, 0, sizeof(*ie));
872 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
873 if (pos[0] == 0xdd &&
874 ((pos == buf + len - 1) || pos[1] == 0)) {
875 /* Ignore padding */
876 break;
877 }
878 if (pos + 2 + pos[1] > end) {
879 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
880 "underflow (ie=%d len=%d pos=%d)",
881 pos[0], pos[1], (int) (pos - buf));
882 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
883 buf, len);
884 ret = -1;
885 break;
886 }
887 if (*pos == WLAN_EID_RSN) {
888 ie->rsn_ie = pos;
889 ie->rsn_ie_len = pos[1] + 2;
890 #ifdef CONFIG_IEEE80211R
891 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
892 ie->mdie = pos;
893 ie->mdie_len = pos[1] + 2;
894 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
895 ie->ftie = pos;
896 ie->ftie_len = pos[1] + 2;
897 #endif /* CONFIG_IEEE80211R */
898 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
899 ret = wpa_parse_generic(pos, end, ie);
900 if (ret < 0)
901 break;
902 if (ret > 0) {
903 ret = 0;
904 break;
905 }
906 } else {
907 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
908 "Key Data IE", pos, 2 + pos[1]);
909 }
910 }
911
912 return ret;
913 }
914
915
wpa_auth_uses_mfp(struct wpa_state_machine * sm)916 int wpa_auth_uses_mfp(struct wpa_state_machine *sm)
917 {
918 return sm ? sm->mgmt_frame_prot : 0;
919 }
920