1 /*
2 * wpa_supplicant - WPA/RSN IE and KDE processing
3 * Copyright (c) 2003-2008, 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 "includes.h"
10
11 #include "common.h"
12 #include "wpa.h"
13 #include "pmksa_cache.h"
14 #include "common/ieee802_11_defs.h"
15 #include "wpa_i.h"
16 #include "wpa_ie.h"
17
18
19 /**
20 * wpa_parse_wpa_ie - Parse WPA/RSN IE
21 * @wpa_ie: Pointer to WPA or RSN IE
22 * @wpa_ie_len: Length of the WPA/RSN IE
23 * @data: Pointer to data area for parsing results
24 * Returns: 0 on success, -1 on failure
25 *
26 * Parse the contents of WPA or RSN IE and write the parsed data into data.
27 */
wpa_parse_wpa_ie(const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ie_data * data)28 int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
29 struct wpa_ie_data *data)
30 {
31 if (wpa_ie_len >= 1 && wpa_ie[0] == WLAN_EID_RSN)
32 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
33 else
34 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
35 }
36
37
wpa_gen_wpa_ie_wpa(u8 * wpa_ie,size_t wpa_ie_len,int pairwise_cipher,int group_cipher,int key_mgmt)38 static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
39 int pairwise_cipher, int group_cipher,
40 int key_mgmt)
41 {
42 u8 *pos;
43 struct wpa_ie_hdr *hdr;
44 u32 suite;
45
46 if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
47 2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
48 return -1;
49
50 hdr = (struct wpa_ie_hdr *) wpa_ie;
51 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
52 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
53 WPA_PUT_LE16(hdr->version, WPA_VERSION);
54 pos = (u8 *) (hdr + 1);
55
56 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, group_cipher);
57 if (suite == 0) {
58 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
59 group_cipher);
60 return -1;
61 }
62 RSN_SELECTOR_PUT(pos, suite);
63 pos += WPA_SELECTOR_LEN;
64
65 *pos++ = 1;
66 *pos++ = 0;
67 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, pairwise_cipher);
68 if (suite == 0 ||
69 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
70 pairwise_cipher != WPA_CIPHER_NONE)) {
71 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
72 pairwise_cipher);
73 return -1;
74 }
75 RSN_SELECTOR_PUT(pos, suite);
76 pos += WPA_SELECTOR_LEN;
77
78 *pos++ = 1;
79 *pos++ = 0;
80 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
81 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
82 } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
83 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
84 } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
85 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE);
86 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
87 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_CCKM);
88 } else {
89 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
90 key_mgmt);
91 return -1;
92 }
93 pos += WPA_SELECTOR_LEN;
94
95 /* WPA Capabilities; use defaults, so no need to include it */
96
97 hdr->len = (pos - wpa_ie) - 2;
98
99 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
100
101 return pos - wpa_ie;
102 }
103
104
wpa_gen_wpa_ie_rsn(u8 * rsn_ie,size_t rsn_ie_len,int pairwise_cipher,int group_cipher,int key_mgmt,int mgmt_group_cipher,struct wpa_sm * sm)105 static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
106 int pairwise_cipher, int group_cipher,
107 int key_mgmt, int mgmt_group_cipher,
108 struct wpa_sm *sm)
109 {
110 u8 *pos;
111 struct rsn_ie_hdr *hdr;
112 u16 capab;
113 u32 suite;
114
115 if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
116 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
117 (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) {
118 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)",
119 (unsigned long) rsn_ie_len);
120 return -1;
121 }
122
123 hdr = (struct rsn_ie_hdr *) rsn_ie;
124 hdr->elem_id = WLAN_EID_RSN;
125 WPA_PUT_LE16(hdr->version, RSN_VERSION);
126 pos = (u8 *) (hdr + 1);
127
128 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
129 if (suite == 0) {
130 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
131 group_cipher);
132 return -1;
133 }
134 RSN_SELECTOR_PUT(pos, suite);
135 pos += RSN_SELECTOR_LEN;
136
137 *pos++ = 1;
138 *pos++ = 0;
139 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
140 if (suite == 0 ||
141 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
142 pairwise_cipher != WPA_CIPHER_NONE)) {
143 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
144 pairwise_cipher);
145 return -1;
146 }
147 RSN_SELECTOR_PUT(pos, suite);
148 pos += RSN_SELECTOR_LEN;
149
150 *pos++ = 1;
151 *pos++ = 0;
152 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
153 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
154 } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
155 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
156 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
157 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_CCKM);
158 #ifdef CONFIG_IEEE80211R
159 } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
160 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
161 } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) {
162 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
163 #endif /* CONFIG_IEEE80211R */
164 #ifdef CONFIG_IEEE80211W
165 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) {
166 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
167 } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) {
168 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
169 #endif /* CONFIG_IEEE80211W */
170 #ifdef CONFIG_SAE
171 } else if (key_mgmt == WPA_KEY_MGMT_SAE) {
172 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
173 } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) {
174 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
175 #endif /* CONFIG_SAE */
176 } else {
177 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
178 key_mgmt);
179 return -1;
180 }
181 pos += RSN_SELECTOR_LEN;
182
183 /* RSN Capabilities */
184 capab = 0;
185 #ifdef CONFIG_IEEE80211W
186 if (sm->mfp)
187 capab |= WPA_CAPABILITY_MFPC;
188 if (sm->mfp == 2)
189 capab |= WPA_CAPABILITY_MFPR;
190 #endif /* CONFIG_IEEE80211W */
191 WPA_PUT_LE16(pos, capab);
192 pos += 2;
193
194 if (sm->cur_pmksa) {
195 /* PMKID Count (2 octets, little endian) */
196 *pos++ = 1;
197 *pos++ = 0;
198 /* PMKID */
199 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
200 pos += PMKID_LEN;
201 }
202
203 #ifdef CONFIG_IEEE80211W
204 if (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) {
205 if (!sm->cur_pmksa) {
206 /* PMKID Count */
207 WPA_PUT_LE16(pos, 0);
208 pos += 2;
209 }
210
211 /* Management Group Cipher Suite */
212 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
213 mgmt_group_cipher));
214 pos += RSN_SELECTOR_LEN;
215 }
216 #endif /* CONFIG_IEEE80211W */
217
218 hdr->len = (pos - rsn_ie) - 2;
219
220 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len);
221
222 return pos - rsn_ie;
223 }
224
225
226 #ifdef CONFIG_HS20
wpa_gen_wpa_ie_osen(u8 * wpa_ie,size_t wpa_ie_len,int pairwise_cipher,int group_cipher,int key_mgmt)227 static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len,
228 int pairwise_cipher, int group_cipher,
229 int key_mgmt)
230 {
231 u8 *pos, *len;
232 u32 suite;
233
234 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN +
235 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN)
236 return -1;
237
238 pos = wpa_ie;
239 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
240 len = pos++; /* to be filled */
241 WPA_PUT_BE24(pos, OUI_WFA);
242 pos += 3;
243 *pos++ = HS20_OSEN_OUI_TYPE;
244
245 /* Group Data Cipher Suite */
246 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
247 if (suite == 0) {
248 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
249 group_cipher);
250 return -1;
251 }
252 RSN_SELECTOR_PUT(pos, suite);
253 pos += RSN_SELECTOR_LEN;
254
255 /* Pairwise Cipher Suite Count and List */
256 WPA_PUT_LE16(pos, 1);
257 pos += 2;
258 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
259 if (suite == 0 ||
260 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
261 pairwise_cipher != WPA_CIPHER_NONE)) {
262 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
263 pairwise_cipher);
264 return -1;
265 }
266 RSN_SELECTOR_PUT(pos, suite);
267 pos += RSN_SELECTOR_LEN;
268
269 /* AKM Suite Count and List */
270 WPA_PUT_LE16(pos, 1);
271 pos += 2;
272 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN);
273 pos += RSN_SELECTOR_LEN;
274
275 *len = pos - len - 1;
276
277 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
278
279 return pos - wpa_ie;
280 }
281 #endif /* CONFIG_HS20 */
282
283
284 /**
285 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy
286 * @sm: Pointer to WPA state machine data from wpa_sm_init()
287 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE
288 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE
289 * Returns: Length of the generated WPA/RSN IE or -1 on failure
290 */
wpa_gen_wpa_ie(struct wpa_sm * sm,u8 * wpa_ie,size_t wpa_ie_len)291 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
292 {
293 if (sm->proto == WPA_PROTO_RSN)
294 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
295 sm->pairwise_cipher,
296 sm->group_cipher,
297 sm->key_mgmt, sm->mgmt_group_cipher,
298 sm);
299 #ifdef CONFIG_HS20
300 else if (sm->proto == WPA_PROTO_OSEN)
301 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len,
302 sm->pairwise_cipher,
303 sm->group_cipher,
304 sm->key_mgmt);
305 #endif /* CONFIG_HS20 */
306 else
307 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
308 sm->pairwise_cipher,
309 sm->group_cipher,
310 sm->key_mgmt);
311 }
312
313
314 /**
315 * wpa_parse_vendor_specific - Parse Vendor Specific IEs
316 * @pos: Pointer to the IE header
317 * @end: Pointer to the end of the Key Data buffer
318 * @ie: Pointer to parsed IE data
319 * Returns: 0 on success, 1 if end mark is found, -1 on failure
320 */
wpa_parse_vendor_specific(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)321 static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end,
322 struct wpa_eapol_ie_parse *ie)
323 {
324 unsigned int oui;
325
326 if (pos[1] < 4) {
327 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)",
328 pos[1]);
329 return 1;
330 }
331
332 oui = WPA_GET_BE24(&pos[2]);
333 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) {
334 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) {
335 ie->wmm = &pos[2];
336 ie->wmm_len = pos[1];
337 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE",
338 ie->wmm, ie->wmm_len);
339 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) {
340 ie->wmm = &pos[2];
341 ie->wmm_len = pos[1];
342 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element",
343 ie->wmm, ie->wmm_len);
344 }
345 }
346 return 0;
347 }
348
349
350 /**
351 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
352 * @pos: Pointer to the IE header
353 * @end: Pointer to the end of the Key Data buffer
354 * @ie: Pointer to parsed IE data
355 * Returns: 0 on success, 1 if end mark is found, -1 on failure
356 */
wpa_parse_generic(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)357 static int wpa_parse_generic(const u8 *pos, const u8 *end,
358 struct wpa_eapol_ie_parse *ie)
359 {
360 if (pos[1] == 0)
361 return 1;
362
363 if (pos[1] >= 6 &&
364 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
365 pos[2 + WPA_SELECTOR_LEN] == 1 &&
366 pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
367 ie->wpa_ie = pos;
368 ie->wpa_ie_len = pos[1] + 2;
369 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
370 ie->wpa_ie, ie->wpa_ie_len);
371 return 0;
372 }
373
374 if (pos + 1 + RSN_SELECTOR_LEN < end &&
375 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
376 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
377 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
378 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
379 pos, pos[1] + 2);
380 return 0;
381 }
382
383 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
384 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
385 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
386 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
387 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
388 pos, pos[1] + 2);
389 return 0;
390 }
391
392 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
393 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
394 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
395 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
396 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
397 pos, pos[1] + 2);
398 return 0;
399 }
400
401 #ifdef CONFIG_PEERKEY
402 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
403 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
404 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
405 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
406 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key",
407 pos, pos[1] + 2);
408 return 0;
409 }
410
411 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
412 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
413 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
414 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
415 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key",
416 pos, pos[1] + 2);
417 return 0;
418 }
419
420 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
421 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
422 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
423 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
424 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key",
425 pos, pos[1] + 2);
426 return 0;
427 }
428
429 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
430 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
431 ie->error = pos + 2 + RSN_SELECTOR_LEN;
432 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
433 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key",
434 pos, pos[1] + 2);
435 return 0;
436 }
437 #endif /* CONFIG_PEERKEY */
438
439 #ifdef CONFIG_IEEE80211W
440 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
441 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
442 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
443 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
444 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
445 pos, pos[1] + 2);
446 return 0;
447 }
448 #endif /* CONFIG_IEEE80211W */
449
450 #ifdef CONFIG_P2P
451 if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
452 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
453 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
454 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
455 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
456 return 0;
457 }
458
459 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
460 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
461 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
462 wpa_hexdump(MSG_DEBUG,
463 "WPA: IP Address Allocation in EAPOL-Key",
464 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
465 return 0;
466 }
467 #endif /* CONFIG_P2P */
468
469 return 0;
470 }
471
472
473 /**
474 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs
475 * @buf: Pointer to the Key Data buffer
476 * @len: Key Data Length
477 * @ie: Pointer to parsed IE data
478 * Returns: 0 on success, -1 on failure
479 */
wpa_supplicant_parse_ies(const u8 * buf,size_t len,struct wpa_eapol_ie_parse * ie)480 int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
481 struct wpa_eapol_ie_parse *ie)
482 {
483 const u8 *pos, *end;
484 int ret = 0;
485
486 os_memset(ie, 0, sizeof(*ie));
487 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
488 if (pos[0] == 0xdd &&
489 ((pos == buf + len - 1) || pos[1] == 0)) {
490 /* Ignore padding */
491 break;
492 }
493 if (pos + 2 + pos[1] > end) {
494 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
495 "underflow (ie=%d len=%d pos=%d)",
496 pos[0], pos[1], (int) (pos - buf));
497 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
498 buf, len);
499 ret = -1;
500 break;
501 }
502 if (*pos == WLAN_EID_RSN) {
503 ie->rsn_ie = pos;
504 ie->rsn_ie_len = pos[1] + 2;
505 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
506 ie->rsn_ie, ie->rsn_ie_len);
507 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
508 ie->mdie = pos;
509 ie->mdie_len = pos[1] + 2;
510 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
511 ie->mdie, ie->mdie_len);
512 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
513 ie->ftie = pos;
514 ie->ftie_len = pos[1] + 2;
515 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
516 ie->ftie, ie->ftie_len);
517 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
518 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
519 ie->reassoc_deadline = pos;
520 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
521 "in EAPOL-Key",
522 ie->reassoc_deadline, pos[1] + 2);
523 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
524 ie->key_lifetime = pos;
525 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
526 "in EAPOL-Key",
527 ie->key_lifetime, pos[1] + 2);
528 } else {
529 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
530 "EAPOL-Key Key Data IE",
531 pos, 2 + pos[1]);
532 }
533 } else if (*pos == WLAN_EID_LINK_ID) {
534 if (pos[1] >= 18) {
535 ie->lnkid = pos;
536 ie->lnkid_len = pos[1] + 2;
537 }
538 } else if (*pos == WLAN_EID_EXT_CAPAB) {
539 ie->ext_capab = pos;
540 ie->ext_capab_len = pos[1] + 2;
541 } else if (*pos == WLAN_EID_SUPP_RATES) {
542 ie->supp_rates = pos;
543 ie->supp_rates_len = pos[1] + 2;
544 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
545 ie->ext_supp_rates = pos;
546 ie->ext_supp_rates_len = pos[1] + 2;
547 } else if (*pos == WLAN_EID_HT_CAP) {
548 ie->ht_capabilities = pos + 2;
549 ie->ht_capabilities_len = pos[1];
550 } else if (*pos == WLAN_EID_VHT_AID) {
551 if (pos[1] >= 2)
552 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff;
553 } else if (*pos == WLAN_EID_VHT_CAP) {
554 ie->vht_capabilities = pos + 2;
555 ie->vht_capabilities_len = pos[1];
556 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
557 ie->qosinfo = pos[2];
558 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
559 ie->supp_channels = pos + 2;
560 ie->supp_channels_len = pos[1];
561 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
562 /*
563 * The value of the Length field of the Supported
564 * Operating Classes element is between 2 and 253.
565 * Silently skip invalid elements to avoid interop
566 * issues when trying to use the value.
567 */
568 if (pos[1] >= 2 && pos[1] <= 253) {
569 ie->supp_oper_classes = pos + 2;
570 ie->supp_oper_classes_len = pos[1];
571 }
572 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
573 ret = wpa_parse_generic(pos, end, ie);
574 if (ret < 0)
575 break;
576 if (ret > 0) {
577 ret = 0;
578 break;
579 }
580
581 ret = wpa_parse_vendor_specific(pos, end, ie);
582 if (ret < 0)
583 break;
584 if (ret > 0) {
585 ret = 0;
586 break;
587 }
588 } else {
589 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
590 "Key Data IE", pos, 2 + pos[1]);
591 }
592 }
593
594 return ret;
595 }
596