1 /*
2 * wpa_supplicant - WPA/RSN IE and KDE processing
3 * Copyright (c) 2003-2015, 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 "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 if (wpa_ie_len >= 6 && wpa_ie[0] == WLAN_EID_VENDOR_SPECIFIC &&
34 wpa_ie[1] >= 4 && WPA_GET_BE32(&wpa_ie[2]) == OSEN_IE_VENDOR_TYPE)
35 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
36 else
37 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
38 }
39
40
wpa_gen_wpa_ie_wpa(u8 * wpa_ie,size_t wpa_ie_len,int pairwise_cipher,int group_cipher,int key_mgmt)41 static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
42 int pairwise_cipher, int group_cipher,
43 int key_mgmt)
44 {
45 u8 *pos;
46 struct wpa_ie_hdr *hdr;
47 u32 suite;
48
49 if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
50 2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
51 return -1;
52
53 hdr = (struct wpa_ie_hdr *) wpa_ie;
54 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
55 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
56 WPA_PUT_LE16(hdr->version, WPA_VERSION);
57 pos = (u8 *) (hdr + 1);
58
59 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, group_cipher);
60 if (suite == 0) {
61 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
62 group_cipher);
63 return -1;
64 }
65 RSN_SELECTOR_PUT(pos, suite);
66 pos += WPA_SELECTOR_LEN;
67
68 *pos++ = 1;
69 *pos++ = 0;
70 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, pairwise_cipher);
71 if (suite == 0 ||
72 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
73 pairwise_cipher != WPA_CIPHER_NONE)) {
74 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
75 pairwise_cipher);
76 return -1;
77 }
78 RSN_SELECTOR_PUT(pos, suite);
79 pos += WPA_SELECTOR_LEN;
80
81 *pos++ = 1;
82 *pos++ = 0;
83 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
84 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
85 } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
86 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
87 } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
88 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE);
89 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
90 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_CCKM);
91 } else {
92 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
93 key_mgmt);
94 return -1;
95 }
96 pos += WPA_SELECTOR_LEN;
97
98 /* WPA Capabilities; use defaults, so no need to include it */
99
100 hdr->len = (pos - wpa_ie) - 2;
101
102 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
103
104 return pos - wpa_ie;
105 }
106
107
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)108 static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
109 int pairwise_cipher, int group_cipher,
110 int key_mgmt, int mgmt_group_cipher,
111 struct wpa_sm *sm)
112 {
113 u8 *pos;
114 struct rsn_ie_hdr *hdr;
115 u16 capab;
116 u32 suite;
117
118 if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
119 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
120 (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) {
121 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)",
122 (unsigned long) rsn_ie_len);
123 return -1;
124 }
125
126 hdr = (struct rsn_ie_hdr *) rsn_ie;
127 hdr->elem_id = WLAN_EID_RSN;
128 WPA_PUT_LE16(hdr->version, RSN_VERSION);
129 pos = (u8 *) (hdr + 1);
130
131 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
132 if (suite == 0) {
133 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
134 group_cipher);
135 return -1;
136 }
137 RSN_SELECTOR_PUT(pos, suite);
138 pos += RSN_SELECTOR_LEN;
139
140 *pos++ = 1;
141 *pos++ = 0;
142 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
143 if (suite == 0 ||
144 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
145 pairwise_cipher != WPA_CIPHER_NONE)) {
146 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
147 pairwise_cipher);
148 return -1;
149 }
150 RSN_SELECTOR_PUT(pos, suite);
151 pos += RSN_SELECTOR_LEN;
152
153 *pos++ = 1;
154 *pos++ = 0;
155 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
156 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
157 } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
158 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
159 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
160 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_CCKM);
161 #ifdef CONFIG_IEEE80211R
162 } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
163 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
164 } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) {
165 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
166 #endif /* CONFIG_IEEE80211R */
167 #ifdef CONFIG_IEEE80211W
168 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) {
169 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
170 } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) {
171 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
172 #endif /* CONFIG_IEEE80211W */
173 #ifdef CONFIG_SAE
174 } else if (key_mgmt == WPA_KEY_MGMT_SAE) {
175 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
176 } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) {
177 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
178 #endif /* CONFIG_SAE */
179 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
180 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192);
181 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SUITE_B) {
182 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B);
183 #ifdef CONFIG_FILS
184 } else if (key_mgmt & WPA_KEY_MGMT_FILS_SHA256) {
185 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256);
186 } else if (key_mgmt & WPA_KEY_MGMT_FILS_SHA384) {
187 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384);
188 #ifdef CONFIG_IEEE80211R
189 } else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256) {
190 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256);
191 } else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384) {
192 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384);
193 #endif /* CONFIG_IEEE80211R */
194 #endif /* CONFIG_FILS */
195 #ifdef CONFIG_OWE
196 } else if (key_mgmt & WPA_KEY_MGMT_OWE) {
197 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OWE);
198 #endif /* CONFIG_OWE */
199 #ifdef CONFIG_DPP
200 } else if (key_mgmt & WPA_KEY_MGMT_DPP) {
201 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_DPP);
202 #endif /* CONFIG_DPP */
203 } else {
204 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
205 key_mgmt);
206 return -1;
207 }
208 pos += RSN_SELECTOR_LEN;
209
210 /* RSN Capabilities */
211 capab = 0;
212 #ifdef CONFIG_IEEE80211W
213 if (sm->mfp)
214 capab |= WPA_CAPABILITY_MFPC;
215 if (sm->mfp == 2)
216 capab |= WPA_CAPABILITY_MFPR;
217 #endif /* CONFIG_IEEE80211W */
218 WPA_PUT_LE16(pos, capab);
219 pos += 2;
220
221 if (sm->cur_pmksa) {
222 /* PMKID Count (2 octets, little endian) */
223 *pos++ = 1;
224 *pos++ = 0;
225 /* PMKID */
226 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
227 pos += PMKID_LEN;
228 }
229
230 #ifdef CONFIG_IEEE80211W
231 if (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) {
232 if (!sm->cur_pmksa) {
233 /* PMKID Count */
234 WPA_PUT_LE16(pos, 0);
235 pos += 2;
236 }
237
238 /* Management Group Cipher Suite */
239 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN,
240 mgmt_group_cipher));
241 pos += RSN_SELECTOR_LEN;
242 }
243 #endif /* CONFIG_IEEE80211W */
244
245 hdr->len = (pos - rsn_ie) - 2;
246
247 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len);
248
249 return pos - rsn_ie;
250 }
251
252
253 #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)254 static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len,
255 int pairwise_cipher, int group_cipher,
256 int key_mgmt)
257 {
258 u8 *pos, *len;
259 u32 suite;
260
261 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN +
262 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN)
263 return -1;
264
265 pos = wpa_ie;
266 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
267 len = pos++; /* to be filled */
268 WPA_PUT_BE24(pos, OUI_WFA);
269 pos += 3;
270 *pos++ = HS20_OSEN_OUI_TYPE;
271
272 /* Group Data Cipher Suite */
273 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
274 if (suite == 0) {
275 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
276 group_cipher);
277 return -1;
278 }
279 RSN_SELECTOR_PUT(pos, suite);
280 pos += RSN_SELECTOR_LEN;
281
282 /* Pairwise Cipher Suite Count and List */
283 WPA_PUT_LE16(pos, 1);
284 pos += 2;
285 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
286 if (suite == 0 ||
287 (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
288 pairwise_cipher != WPA_CIPHER_NONE)) {
289 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
290 pairwise_cipher);
291 return -1;
292 }
293 RSN_SELECTOR_PUT(pos, suite);
294 pos += RSN_SELECTOR_LEN;
295
296 /* AKM Suite Count and List */
297 WPA_PUT_LE16(pos, 1);
298 pos += 2;
299 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN);
300 pos += RSN_SELECTOR_LEN;
301
302 *len = pos - len - 1;
303
304 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
305
306 return pos - wpa_ie;
307 }
308 #endif /* CONFIG_HS20 */
309
310
311 /**
312 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy
313 * @sm: Pointer to WPA state machine data from wpa_sm_init()
314 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE
315 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE
316 * Returns: Length of the generated WPA/RSN IE or -1 on failure
317 */
wpa_gen_wpa_ie(struct wpa_sm * sm,u8 * wpa_ie,size_t wpa_ie_len)318 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
319 {
320 if (sm->proto == WPA_PROTO_RSN)
321 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
322 sm->pairwise_cipher,
323 sm->group_cipher,
324 sm->key_mgmt, sm->mgmt_group_cipher,
325 sm);
326 #ifdef CONFIG_HS20
327 else if (sm->proto == WPA_PROTO_OSEN)
328 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len,
329 sm->pairwise_cipher,
330 sm->group_cipher,
331 sm->key_mgmt);
332 #endif /* CONFIG_HS20 */
333 else
334 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
335 sm->pairwise_cipher,
336 sm->group_cipher,
337 sm->key_mgmt);
338 }
339
340
341 /**
342 * wpa_parse_vendor_specific - Parse Vendor Specific IEs
343 * @pos: Pointer to the IE header
344 * @end: Pointer to the end of the Key Data buffer
345 * @ie: Pointer to parsed IE data
346 * Returns: 0 on success, 1 if end mark is found, -1 on failure
347 */
wpa_parse_vendor_specific(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)348 static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end,
349 struct wpa_eapol_ie_parse *ie)
350 {
351 unsigned int oui;
352
353 if (pos[1] < 4) {
354 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)",
355 pos[1]);
356 return 1;
357 }
358
359 oui = WPA_GET_BE24(&pos[2]);
360 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) {
361 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) {
362 ie->wmm = &pos[2];
363 ie->wmm_len = pos[1];
364 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE",
365 ie->wmm, ie->wmm_len);
366 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) {
367 ie->wmm = &pos[2];
368 ie->wmm_len = pos[1];
369 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element",
370 ie->wmm, ie->wmm_len);
371 }
372 }
373 return 0;
374 }
375
376
377 /**
378 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
379 * @pos: Pointer to the IE header
380 * @end: Pointer to the end of the Key Data buffer
381 * @ie: Pointer to parsed IE data
382 * Returns: 0 on success, 1 if end mark is found, -1 on failure
383 */
wpa_parse_generic(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)384 static int wpa_parse_generic(const u8 *pos, const u8 *end,
385 struct wpa_eapol_ie_parse *ie)
386 {
387 if (pos[1] == 0)
388 return 1;
389
390 if (pos[1] >= 6 &&
391 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
392 pos[2 + WPA_SELECTOR_LEN] == 1 &&
393 pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
394 ie->wpa_ie = pos;
395 ie->wpa_ie_len = pos[1] + 2;
396 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
397 ie->wpa_ie, ie->wpa_ie_len);
398 return 0;
399 }
400
401 if (1 + RSN_SELECTOR_LEN < end - pos &&
402 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
403 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
404 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
405 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
406 pos, pos[1] + 2);
407 return 0;
408 }
409
410 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
411 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
412 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
413 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
414 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
415 pos, pos[1] + 2);
416 return 0;
417 }
418
419 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
420 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
421 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
422 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
423 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
424 pos, pos[1] + 2);
425 return 0;
426 }
427
428 #ifdef CONFIG_IEEE80211W
429 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
430 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
431 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
432 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
433 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
434 pos, pos[1] + 2);
435 return 0;
436 }
437 #endif /* CONFIG_IEEE80211W */
438
439 #ifdef CONFIG_P2P
440 if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
441 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
442 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
443 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
444 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
445 return 0;
446 }
447
448 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
449 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
450 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
451 wpa_hexdump(MSG_DEBUG,
452 "WPA: IP Address Allocation in EAPOL-Key",
453 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
454 return 0;
455 }
456 #endif /* CONFIG_P2P */
457
458 return 0;
459 }
460
461
462 /**
463 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs
464 * @buf: Pointer to the Key Data buffer
465 * @len: Key Data Length
466 * @ie: Pointer to parsed IE data
467 * Returns: 0 on success, -1 on failure
468 */
wpa_supplicant_parse_ies(const u8 * buf,size_t len,struct wpa_eapol_ie_parse * ie)469 int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
470 struct wpa_eapol_ie_parse *ie)
471 {
472 const u8 *pos, *end;
473 int ret = 0;
474
475 os_memset(ie, 0, sizeof(*ie));
476 for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) {
477 if (pos[0] == 0xdd &&
478 ((pos == buf + len - 1) || pos[1] == 0)) {
479 /* Ignore padding */
480 break;
481 }
482 if (2 + pos[1] > end - pos) {
483 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
484 "underflow (ie=%d len=%d pos=%d)",
485 pos[0], pos[1], (int) (pos - buf));
486 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
487 buf, len);
488 ret = -1;
489 break;
490 }
491 if (*pos == WLAN_EID_RSN) {
492 ie->rsn_ie = pos;
493 ie->rsn_ie_len = pos[1] + 2;
494 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
495 ie->rsn_ie, ie->rsn_ie_len);
496 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN &&
497 pos[1] >= sizeof(struct rsn_mdie)) {
498 ie->mdie = pos;
499 ie->mdie_len = pos[1] + 2;
500 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
501 ie->mdie, ie->mdie_len);
502 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION &&
503 pos[1] >= sizeof(struct rsn_ftie)) {
504 ie->ftie = pos;
505 ie->ftie_len = pos[1] + 2;
506 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
507 ie->ftie, ie->ftie_len);
508 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
509 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
510 ie->reassoc_deadline = pos;
511 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
512 "in EAPOL-Key",
513 ie->reassoc_deadline, pos[1] + 2);
514 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
515 ie->key_lifetime = pos;
516 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
517 "in EAPOL-Key",
518 ie->key_lifetime, pos[1] + 2);
519 } else {
520 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
521 "EAPOL-Key Key Data IE",
522 pos, 2 + pos[1]);
523 }
524 } else if (*pos == WLAN_EID_LINK_ID) {
525 if (pos[1] >= 18) {
526 ie->lnkid = pos;
527 ie->lnkid_len = pos[1] + 2;
528 }
529 } else if (*pos == WLAN_EID_EXT_CAPAB) {
530 ie->ext_capab = pos;
531 ie->ext_capab_len = pos[1] + 2;
532 } else if (*pos == WLAN_EID_SUPP_RATES) {
533 ie->supp_rates = pos;
534 ie->supp_rates_len = pos[1] + 2;
535 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
536 ie->ext_supp_rates = pos;
537 ie->ext_supp_rates_len = pos[1] + 2;
538 } else if (*pos == WLAN_EID_HT_CAP &&
539 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) {
540 ie->ht_capabilities = pos + 2;
541 } else if (*pos == WLAN_EID_VHT_AID) {
542 if (pos[1] >= 2)
543 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff;
544 } else if (*pos == WLAN_EID_VHT_CAP &&
545 pos[1] >= sizeof(struct ieee80211_vht_capabilities))
546 {
547 ie->vht_capabilities = pos + 2;
548 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
549 ie->qosinfo = pos[2];
550 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
551 ie->supp_channels = pos + 2;
552 ie->supp_channels_len = pos[1];
553 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
554 /*
555 * The value of the Length field of the Supported
556 * Operating Classes element is between 2 and 253.
557 * Silently skip invalid elements to avoid interop
558 * issues when trying to use the value.
559 */
560 if (pos[1] >= 2 && pos[1] <= 253) {
561 ie->supp_oper_classes = pos + 2;
562 ie->supp_oper_classes_len = pos[1];
563 }
564 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
565 ret = wpa_parse_generic(pos, end, ie);
566 if (ret < 0)
567 break;
568 if (ret > 0) {
569 ret = 0;
570 break;
571 }
572
573 ret = wpa_parse_vendor_specific(pos, end, ie);
574 if (ret < 0)
575 break;
576 if (ret > 0) {
577 ret = 0;
578 break;
579 }
580 } else {
581 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
582 "Key Data IE", pos, 2 + pos[1]);
583 }
584 }
585
586 return ret;
587 }
588