1 /*
2 * WPA/RSN - Shared functions for supplicant and authenticator
3 * Copyright (c) 2002-2015, 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 "crypto/md5.h"
13 #include "crypto/sha1.h"
14 #include "crypto/sha256.h"
15 #include "crypto/sha384.h"
16 #include "crypto/aes_wrap.h"
17 #include "crypto/crypto.h"
18 #include "ieee802_11_defs.h"
19 #include "defs.h"
20 #include "wpa_common.h"
21
22
wpa_kck_len(int akmp)23 static unsigned int wpa_kck_len(int akmp)
24 {
25 if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
26 return 24;
27 return 16;
28 }
29
30
wpa_kek_len(int akmp)31 static unsigned int wpa_kek_len(int akmp)
32 {
33 if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
34 return 32;
35 return 16;
36 }
37
38
wpa_mic_len(int akmp)39 unsigned int wpa_mic_len(int akmp)
40 {
41 if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
42 return 24;
43 return 16;
44 }
45
46
47 /**
48 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
49 * @key: EAPOL-Key Key Confirmation Key (KCK)
50 * @key_len: KCK length in octets
51 * @akmp: WPA_KEY_MGMT_* used in key derivation
52 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
53 * @buf: Pointer to the beginning of the EAPOL header (version field)
54 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
55 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
56 * Returns: 0 on success, -1 on failure
57 *
58 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
59 * to be cleared (all zeroes) when calling this function.
60 *
61 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
62 * description of the Key MIC calculation. It includes packet data from the
63 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
64 * happened during final editing of the standard and the correct behavior is
65 * defined in the last draft (IEEE 802.11i/D10).
66 */
wpa_eapol_key_mic(const u8 * key,size_t key_len,int akmp,int ver,const u8 * buf,size_t len,u8 * mic)67 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
68 const u8 *buf, size_t len, u8 *mic)
69 {
70 u8 hash[SHA384_MAC_LEN];
71
72 switch (ver) {
73 #ifndef CONFIG_FIPS
74 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
75 return hmac_md5(key, key_len, buf, len, mic);
76 #endif /* CONFIG_FIPS */
77 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
78 if (hmac_sha1(key, key_len, buf, len, hash))
79 return -1;
80 os_memcpy(mic, hash, MD5_MAC_LEN);
81 break;
82 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
83 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
84 return omac1_aes_128(key, buf, len, mic);
85 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
86 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
87 switch (akmp) {
88 #ifdef CONFIG_HS20
89 case WPA_KEY_MGMT_OSEN:
90 return omac1_aes_128(key, buf, len, mic);
91 #endif /* CONFIG_HS20 */
92 #ifdef CONFIG_SUITEB
93 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
94 if (hmac_sha256(key, key_len, buf, len, hash))
95 return -1;
96 os_memcpy(mic, hash, MD5_MAC_LEN);
97 break;
98 #endif /* CONFIG_SUITEB */
99 #ifdef CONFIG_SUITEB192
100 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
101 if (hmac_sha384(key, key_len, buf, len, hash))
102 return -1;
103 os_memcpy(mic, hash, 24);
104 break;
105 #endif /* CONFIG_SUITEB192 */
106 default:
107 return -1;
108 }
109 break;
110 default:
111 return -1;
112 }
113
114 return 0;
115 }
116
117
118 /**
119 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
120 * @pmk: Pairwise master key
121 * @pmk_len: Length of PMK
122 * @label: Label to use in derivation
123 * @addr1: AA or SA
124 * @addr2: SA or AA
125 * @nonce1: ANonce or SNonce
126 * @nonce2: SNonce or ANonce
127 * @ptk: Buffer for pairwise transient key
128 * @akmp: Negotiated AKM
129 * @cipher: Negotiated pairwise cipher
130 * Returns: 0 on success, -1 on failure
131 *
132 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
133 * PTK = PRF-X(PMK, "Pairwise key expansion",
134 * Min(AA, SA) || Max(AA, SA) ||
135 * Min(ANonce, SNonce) || Max(ANonce, SNonce))
136 *
137 * STK = PRF-X(SMK, "Peer key expansion",
138 * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
139 * Min(INonce, PNonce) || Max(INonce, PNonce))
140 */
wpa_pmk_to_ptk(const u8 * pmk,size_t pmk_len,const char * label,const u8 * addr1,const u8 * addr2,const u8 * nonce1,const u8 * nonce2,struct wpa_ptk * ptk,int akmp,int cipher)141 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
142 const u8 *addr1, const u8 *addr2,
143 const u8 *nonce1, const u8 *nonce2,
144 struct wpa_ptk *ptk, int akmp, int cipher)
145 {
146 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
147 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
148 size_t ptk_len;
149
150 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
151 os_memcpy(data, addr1, ETH_ALEN);
152 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
153 } else {
154 os_memcpy(data, addr2, ETH_ALEN);
155 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
156 }
157
158 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
159 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
160 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
161 WPA_NONCE_LEN);
162 } else {
163 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
164 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
165 WPA_NONCE_LEN);
166 }
167
168 ptk->kck_len = wpa_kck_len(akmp);
169 ptk->kek_len = wpa_kek_len(akmp);
170 ptk->tk_len = wpa_cipher_key_len(cipher);
171 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
172
173 #ifdef CONFIG_IEEE80211W
174 if (wpa_key_mgmt_sha256(akmp))
175 sha256_prf(pmk, pmk_len, label, data, sizeof(data),
176 tmp, ptk_len);
177 else
178 #endif /* CONFIG_IEEE80211W */
179 sha1_prf(pmk, pmk_len, label, data, sizeof(data), tmp, ptk_len);
180
181 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
182 MAC2STR(addr1), MAC2STR(addr2));
183 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
184 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
185 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
186 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len);
187
188 os_memcpy(ptk->kck, tmp, ptk->kck_len);
189 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len);
190
191 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
192 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
193
194 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
195 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
196
197 os_memset(tmp, 0, sizeof(tmp));
198 return 0;
199 }
200
201
202 #ifdef CONFIG_IEEE80211R
wpa_ft_mic(const u8 * kck,size_t kck_len,const u8 * sta_addr,const u8 * ap_addr,u8 transaction_seqnum,const u8 * mdie,size_t mdie_len,const u8 * ftie,size_t ftie_len,const u8 * rsnie,size_t rsnie_len,const u8 * ric,size_t ric_len,u8 * mic)203 int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr,
204 const u8 *ap_addr, u8 transaction_seqnum,
205 const u8 *mdie, size_t mdie_len,
206 const u8 *ftie, size_t ftie_len,
207 const u8 *rsnie, size_t rsnie_len,
208 const u8 *ric, size_t ric_len, u8 *mic)
209 {
210 const u8 *addr[9];
211 size_t len[9];
212 size_t i, num_elem = 0;
213 u8 zero_mic[16];
214
215 if (kck_len != 16) {
216 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u",
217 (unsigned int) kck_len);
218 return -1;
219 }
220
221 addr[num_elem] = sta_addr;
222 len[num_elem] = ETH_ALEN;
223 num_elem++;
224
225 addr[num_elem] = ap_addr;
226 len[num_elem] = ETH_ALEN;
227 num_elem++;
228
229 addr[num_elem] = &transaction_seqnum;
230 len[num_elem] = 1;
231 num_elem++;
232
233 if (rsnie) {
234 addr[num_elem] = rsnie;
235 len[num_elem] = rsnie_len;
236 num_elem++;
237 }
238 if (mdie) {
239 addr[num_elem] = mdie;
240 len[num_elem] = mdie_len;
241 num_elem++;
242 }
243 if (ftie) {
244 if (ftie_len < 2 + sizeof(struct rsn_ftie))
245 return -1;
246
247 /* IE hdr and mic_control */
248 addr[num_elem] = ftie;
249 len[num_elem] = 2 + 2;
250 num_elem++;
251
252 /* MIC field with all zeros */
253 os_memset(zero_mic, 0, sizeof(zero_mic));
254 addr[num_elem] = zero_mic;
255 len[num_elem] = sizeof(zero_mic);
256 num_elem++;
257
258 /* Rest of FTIE */
259 addr[num_elem] = ftie + 2 + 2 + 16;
260 len[num_elem] = ftie_len - (2 + 2 + 16);
261 num_elem++;
262 }
263 if (ric) {
264 addr[num_elem] = ric;
265 len[num_elem] = ric_len;
266 num_elem++;
267 }
268
269 for (i = 0; i < num_elem; i++)
270 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]);
271 if (omac1_aes_128_vector(kck, num_elem, addr, len, mic))
272 return -1;
273
274 return 0;
275 }
276
277
wpa_ft_parse_ftie(const u8 * ie,size_t ie_len,struct wpa_ft_ies * parse)278 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
279 struct wpa_ft_ies *parse)
280 {
281 const u8 *end, *pos;
282
283 parse->ftie = ie;
284 parse->ftie_len = ie_len;
285
286 pos = ie + sizeof(struct rsn_ftie);
287 end = ie + ie_len;
288
289 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
290 switch (pos[0]) {
291 case FTIE_SUBELEM_R1KH_ID:
292 if (pos[1] != FT_R1KH_ID_LEN) {
293 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
294 "length in FTIE: %d", pos[1]);
295 return -1;
296 }
297 parse->r1kh_id = pos + 2;
298 break;
299 case FTIE_SUBELEM_GTK:
300 parse->gtk = pos + 2;
301 parse->gtk_len = pos[1];
302 break;
303 case FTIE_SUBELEM_R0KH_ID:
304 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
305 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
306 "length in FTIE: %d", pos[1]);
307 return -1;
308 }
309 parse->r0kh_id = pos + 2;
310 parse->r0kh_id_len = pos[1];
311 break;
312 #ifdef CONFIG_IEEE80211W
313 case FTIE_SUBELEM_IGTK:
314 parse->igtk = pos + 2;
315 parse->igtk_len = pos[1];
316 break;
317 #endif /* CONFIG_IEEE80211W */
318 }
319
320 pos += 2 + pos[1];
321 }
322
323 return 0;
324 }
325
326
wpa_ft_parse_ies(const u8 * ies,size_t ies_len,struct wpa_ft_ies * parse)327 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
328 struct wpa_ft_ies *parse)
329 {
330 const u8 *end, *pos;
331 struct wpa_ie_data data;
332 int ret;
333 const struct rsn_ftie *ftie;
334 int prot_ie_count = 0;
335
336 os_memset(parse, 0, sizeof(*parse));
337 if (ies == NULL)
338 return 0;
339
340 pos = ies;
341 end = ies + ies_len;
342 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
343 switch (pos[0]) {
344 case WLAN_EID_RSN:
345 parse->rsn = pos + 2;
346 parse->rsn_len = pos[1];
347 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
348 parse->rsn_len + 2,
349 &data);
350 if (ret < 0) {
351 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
352 "RSN IE: %d", ret);
353 return -1;
354 }
355 if (data.num_pmkid == 1 && data.pmkid)
356 parse->rsn_pmkid = data.pmkid;
357 break;
358 case WLAN_EID_MOBILITY_DOMAIN:
359 if (pos[1] < sizeof(struct rsn_mdie))
360 return -1;
361 parse->mdie = pos + 2;
362 parse->mdie_len = pos[1];
363 break;
364 case WLAN_EID_FAST_BSS_TRANSITION:
365 if (pos[1] < sizeof(*ftie))
366 return -1;
367 ftie = (const struct rsn_ftie *) (pos + 2);
368 prot_ie_count = ftie->mic_control[1];
369 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
370 return -1;
371 break;
372 case WLAN_EID_TIMEOUT_INTERVAL:
373 if (pos[1] != 5)
374 break;
375 parse->tie = pos + 2;
376 parse->tie_len = pos[1];
377 break;
378 case WLAN_EID_RIC_DATA:
379 if (parse->ric == NULL)
380 parse->ric = pos;
381 break;
382 }
383
384 pos += 2 + pos[1];
385 }
386
387 if (prot_ie_count == 0)
388 return 0; /* no MIC */
389
390 /*
391 * Check that the protected IE count matches with IEs included in the
392 * frame.
393 */
394 if (parse->rsn)
395 prot_ie_count--;
396 if (parse->mdie)
397 prot_ie_count--;
398 if (parse->ftie)
399 prot_ie_count--;
400 if (prot_ie_count < 0) {
401 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
402 "the protected IE count");
403 return -1;
404 }
405
406 if (prot_ie_count == 0 && parse->ric) {
407 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
408 "included in protected IE count");
409 return -1;
410 }
411
412 /* Determine the end of the RIC IE(s) */
413 pos = parse->ric;
414 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
415 prot_ie_count) {
416 prot_ie_count--;
417 pos += 2 + pos[1];
418 }
419 parse->ric_len = pos - parse->ric;
420 if (prot_ie_count) {
421 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
422 "frame", (int) prot_ie_count);
423 return -1;
424 }
425
426 return 0;
427 }
428 #endif /* CONFIG_IEEE80211R */
429
430
rsn_selector_to_bitfield(const u8 * s)431 static int rsn_selector_to_bitfield(const u8 *s)
432 {
433 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
434 return WPA_CIPHER_NONE;
435 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
436 return WPA_CIPHER_TKIP;
437 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
438 return WPA_CIPHER_CCMP;
439 #ifdef CONFIG_IEEE80211W
440 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
441 return WPA_CIPHER_AES_128_CMAC;
442 #endif /* CONFIG_IEEE80211W */
443 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
444 return WPA_CIPHER_GCMP;
445 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
446 return WPA_CIPHER_CCMP_256;
447 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
448 return WPA_CIPHER_GCMP_256;
449 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
450 return WPA_CIPHER_BIP_GMAC_128;
451 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
452 return WPA_CIPHER_BIP_GMAC_256;
453 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
454 return WPA_CIPHER_BIP_CMAC_256;
455 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
456 return WPA_CIPHER_GTK_NOT_USED;
457 return 0;
458 }
459
460
rsn_key_mgmt_to_bitfield(const u8 * s)461 static int rsn_key_mgmt_to_bitfield(const u8 *s)
462 {
463 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
464 return WPA_KEY_MGMT_IEEE8021X;
465 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
466 return WPA_KEY_MGMT_PSK;
467 #ifdef CONFIG_IEEE80211R
468 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
469 return WPA_KEY_MGMT_FT_IEEE8021X;
470 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
471 return WPA_KEY_MGMT_FT_PSK;
472 #endif /* CONFIG_IEEE80211R */
473 #ifdef CONFIG_IEEE80211W
474 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
475 return WPA_KEY_MGMT_IEEE8021X_SHA256;
476 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
477 return WPA_KEY_MGMT_PSK_SHA256;
478 #endif /* CONFIG_IEEE80211W */
479 #ifdef CONFIG_SAE
480 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
481 return WPA_KEY_MGMT_SAE;
482 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
483 return WPA_KEY_MGMT_FT_SAE;
484 #endif /* CONFIG_SAE */
485 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
486 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
487 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192)
488 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
489 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN)
490 return WPA_KEY_MGMT_OSEN;
491 return 0;
492 }
493
494
wpa_cipher_valid_group(int cipher)495 static int wpa_cipher_valid_group(int cipher)
496 {
497 return wpa_cipher_valid_pairwise(cipher) ||
498 cipher == WPA_CIPHER_GTK_NOT_USED;
499 }
500
501
502 #ifdef CONFIG_IEEE80211W
wpa_cipher_valid_mgmt_group(int cipher)503 int wpa_cipher_valid_mgmt_group(int cipher)
504 {
505 return cipher == WPA_CIPHER_AES_128_CMAC ||
506 cipher == WPA_CIPHER_BIP_GMAC_128 ||
507 cipher == WPA_CIPHER_BIP_GMAC_256 ||
508 cipher == WPA_CIPHER_BIP_CMAC_256;
509 }
510 #endif /* CONFIG_IEEE80211W */
511
512
513 /**
514 * wpa_parse_wpa_ie_rsn - Parse RSN IE
515 * @rsn_ie: Buffer containing RSN IE
516 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
517 * @data: Pointer to structure that will be filled in with parsed data
518 * Returns: 0 on success, <0 on failure
519 */
wpa_parse_wpa_ie_rsn(const u8 * rsn_ie,size_t rsn_ie_len,struct wpa_ie_data * data)520 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
521 struct wpa_ie_data *data)
522 {
523 const u8 *pos;
524 int left;
525 int i, count;
526
527 os_memset(data, 0, sizeof(*data));
528 data->proto = WPA_PROTO_RSN;
529 data->pairwise_cipher = WPA_CIPHER_CCMP;
530 data->group_cipher = WPA_CIPHER_CCMP;
531 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
532 data->capabilities = 0;
533 data->pmkid = NULL;
534 data->num_pmkid = 0;
535 #ifdef CONFIG_IEEE80211W
536 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
537 #else /* CONFIG_IEEE80211W */
538 data->mgmt_group_cipher = 0;
539 #endif /* CONFIG_IEEE80211W */
540
541 if (rsn_ie_len == 0) {
542 /* No RSN IE - fail silently */
543 return -1;
544 }
545
546 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
547 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
548 __func__, (unsigned long) rsn_ie_len);
549 return -1;
550 }
551
552 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 &&
553 rsn_ie[1] == rsn_ie_len - 2 &&
554 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) {
555 pos = rsn_ie + 6;
556 left = rsn_ie_len - 6;
557
558 data->proto = WPA_PROTO_OSEN;
559 } else {
560 const struct rsn_ie_hdr *hdr;
561
562 hdr = (const struct rsn_ie_hdr *) rsn_ie;
563
564 if (hdr->elem_id != WLAN_EID_RSN ||
565 hdr->len != rsn_ie_len - 2 ||
566 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
567 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
568 __func__);
569 return -2;
570 }
571
572 pos = (const u8 *) (hdr + 1);
573 left = rsn_ie_len - sizeof(*hdr);
574 }
575
576 if (left >= RSN_SELECTOR_LEN) {
577 data->group_cipher = rsn_selector_to_bitfield(pos);
578 if (!wpa_cipher_valid_group(data->group_cipher)) {
579 wpa_printf(MSG_DEBUG, "%s: invalid group cipher 0x%x",
580 __func__, data->group_cipher);
581 return -1;
582 }
583 pos += RSN_SELECTOR_LEN;
584 left -= RSN_SELECTOR_LEN;
585 } else if (left > 0) {
586 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
587 __func__, left);
588 return -3;
589 }
590
591 if (left >= 2) {
592 data->pairwise_cipher = 0;
593 count = WPA_GET_LE16(pos);
594 pos += 2;
595 left -= 2;
596 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
597 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
598 "count %u left %u", __func__, count, left);
599 return -4;
600 }
601 for (i = 0; i < count; i++) {
602 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
603 pos += RSN_SELECTOR_LEN;
604 left -= RSN_SELECTOR_LEN;
605 }
606 #ifdef CONFIG_IEEE80211W
607 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
608 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
609 "pairwise cipher", __func__);
610 return -1;
611 }
612 #endif /* CONFIG_IEEE80211W */
613 } else if (left == 1) {
614 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
615 __func__);
616 return -5;
617 }
618
619 if (left >= 2) {
620 data->key_mgmt = 0;
621 count = WPA_GET_LE16(pos);
622 pos += 2;
623 left -= 2;
624 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
625 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
626 "count %u left %u", __func__, count, left);
627 return -6;
628 }
629 for (i = 0; i < count; i++) {
630 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
631 pos += RSN_SELECTOR_LEN;
632 left -= RSN_SELECTOR_LEN;
633 }
634 } else if (left == 1) {
635 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
636 __func__);
637 return -7;
638 }
639
640 if (left >= 2) {
641 data->capabilities = WPA_GET_LE16(pos);
642 pos += 2;
643 left -= 2;
644 }
645
646 if (left >= 2) {
647 u16 num_pmkid = WPA_GET_LE16(pos);
648 pos += 2;
649 left -= 2;
650 if (num_pmkid > (unsigned int) left / PMKID_LEN) {
651 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
652 "(num_pmkid=%u left=%d)",
653 __func__, num_pmkid, left);
654 data->num_pmkid = 0;
655 return -9;
656 } else {
657 data->num_pmkid = num_pmkid;
658 data->pmkid = pos;
659 pos += data->num_pmkid * PMKID_LEN;
660 left -= data->num_pmkid * PMKID_LEN;
661 }
662 }
663
664 #ifdef CONFIG_IEEE80211W
665 if (left >= 4) {
666 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
667 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
668 wpa_printf(MSG_DEBUG, "%s: Unsupported management "
669 "group cipher 0x%x", __func__,
670 data->mgmt_group_cipher);
671 return -10;
672 }
673 pos += RSN_SELECTOR_LEN;
674 left -= RSN_SELECTOR_LEN;
675 }
676 #endif /* CONFIG_IEEE80211W */
677
678 if (left > 0) {
679 wpa_hexdump(MSG_DEBUG,
680 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
681 pos, left);
682 }
683
684 return 0;
685 }
686
687
wpa_selector_to_bitfield(const u8 * s)688 static int wpa_selector_to_bitfield(const u8 *s)
689 {
690 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
691 return WPA_CIPHER_NONE;
692 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
693 return WPA_CIPHER_TKIP;
694 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
695 return WPA_CIPHER_CCMP;
696 return 0;
697 }
698
699
wpa_key_mgmt_to_bitfield(const u8 * s)700 static int wpa_key_mgmt_to_bitfield(const u8 *s)
701 {
702 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
703 return WPA_KEY_MGMT_IEEE8021X;
704 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
705 return WPA_KEY_MGMT_PSK;
706 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
707 return WPA_KEY_MGMT_WPA_NONE;
708 return 0;
709 }
710
711
wpa_parse_wpa_ie_wpa(const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ie_data * data)712 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
713 struct wpa_ie_data *data)
714 {
715 const struct wpa_ie_hdr *hdr;
716 const u8 *pos;
717 int left;
718 int i, count;
719
720 os_memset(data, 0, sizeof(*data));
721 data->proto = WPA_PROTO_WPA;
722 data->pairwise_cipher = WPA_CIPHER_TKIP;
723 data->group_cipher = WPA_CIPHER_TKIP;
724 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
725 data->capabilities = 0;
726 data->pmkid = NULL;
727 data->num_pmkid = 0;
728 data->mgmt_group_cipher = 0;
729
730 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
731 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
732 __func__, (unsigned long) wpa_ie_len);
733 return -1;
734 }
735
736 hdr = (const struct wpa_ie_hdr *) wpa_ie;
737
738 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
739 hdr->len != wpa_ie_len - 2 ||
740 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
741 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
742 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
743 __func__);
744 return -2;
745 }
746
747 pos = (const u8 *) (hdr + 1);
748 left = wpa_ie_len - sizeof(*hdr);
749
750 if (left >= WPA_SELECTOR_LEN) {
751 data->group_cipher = wpa_selector_to_bitfield(pos);
752 pos += WPA_SELECTOR_LEN;
753 left -= WPA_SELECTOR_LEN;
754 } else if (left > 0) {
755 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
756 __func__, left);
757 return -3;
758 }
759
760 if (left >= 2) {
761 data->pairwise_cipher = 0;
762 count = WPA_GET_LE16(pos);
763 pos += 2;
764 left -= 2;
765 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
766 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
767 "count %u left %u", __func__, count, left);
768 return -4;
769 }
770 for (i = 0; i < count; i++) {
771 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
772 pos += WPA_SELECTOR_LEN;
773 left -= WPA_SELECTOR_LEN;
774 }
775 } else if (left == 1) {
776 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
777 __func__);
778 return -5;
779 }
780
781 if (left >= 2) {
782 data->key_mgmt = 0;
783 count = WPA_GET_LE16(pos);
784 pos += 2;
785 left -= 2;
786 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
787 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
788 "count %u left %u", __func__, count, left);
789 return -6;
790 }
791 for (i = 0; i < count; i++) {
792 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
793 pos += WPA_SELECTOR_LEN;
794 left -= WPA_SELECTOR_LEN;
795 }
796 } else if (left == 1) {
797 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
798 __func__);
799 return -7;
800 }
801
802 if (left >= 2) {
803 data->capabilities = WPA_GET_LE16(pos);
804 pos += 2;
805 left -= 2;
806 }
807
808 if (left > 0) {
809 wpa_hexdump(MSG_DEBUG,
810 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
811 pos, left);
812 }
813
814 return 0;
815 }
816
817
818 #ifdef CONFIG_IEEE80211R
819
820 /**
821 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
822 *
823 * IEEE Std 802.11r-2008 - 8.5.1.5.3
824 */
wpa_derive_pmk_r0(const u8 * xxkey,size_t xxkey_len,const u8 * ssid,size_t ssid_len,const u8 * mdid,const u8 * r0kh_id,size_t r0kh_id_len,const u8 * s0kh_id,u8 * pmk_r0,u8 * pmk_r0_name)825 void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
826 const u8 *ssid, size_t ssid_len,
827 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
828 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
829 {
830 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
831 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
832 u8 *pos, r0_key_data[48], hash[32];
833 const u8 *addr[2];
834 size_t len[2];
835
836 /*
837 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
838 * SSIDlength || SSID || MDID || R0KHlength ||
839 * R0KH-ID || S0KH-ID)
840 * XXKey is either the second 256 bits of MSK or PSK.
841 * PMK-R0 = L(R0-Key-Data, 0, 256)
842 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
843 */
844 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
845 return;
846 pos = buf;
847 *pos++ = ssid_len;
848 os_memcpy(pos, ssid, ssid_len);
849 pos += ssid_len;
850 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
851 pos += MOBILITY_DOMAIN_ID_LEN;
852 *pos++ = r0kh_id_len;
853 os_memcpy(pos, r0kh_id, r0kh_id_len);
854 pos += r0kh_id_len;
855 os_memcpy(pos, s0kh_id, ETH_ALEN);
856 pos += ETH_ALEN;
857
858 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
859 r0_key_data, sizeof(r0_key_data));
860 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
861
862 /*
863 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
864 */
865 addr[0] = (const u8 *) "FT-R0N";
866 len[0] = 6;
867 addr[1] = r0_key_data + PMK_LEN;
868 len[1] = 16;
869
870 sha256_vector(2, addr, len, hash);
871 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
872 }
873
874
875 /**
876 * wpa_derive_pmk_r1_name - Derive PMKR1Name
877 *
878 * IEEE Std 802.11r-2008 - 8.5.1.5.4
879 */
wpa_derive_pmk_r1_name(const u8 * pmk_r0_name,const u8 * r1kh_id,const u8 * s1kh_id,u8 * pmk_r1_name)880 void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
881 const u8 *s1kh_id, u8 *pmk_r1_name)
882 {
883 u8 hash[32];
884 const u8 *addr[4];
885 size_t len[4];
886
887 /*
888 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
889 * R1KH-ID || S1KH-ID))
890 */
891 addr[0] = (const u8 *) "FT-R1N";
892 len[0] = 6;
893 addr[1] = pmk_r0_name;
894 len[1] = WPA_PMK_NAME_LEN;
895 addr[2] = r1kh_id;
896 len[2] = FT_R1KH_ID_LEN;
897 addr[3] = s1kh_id;
898 len[3] = ETH_ALEN;
899
900 sha256_vector(4, addr, len, hash);
901 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
902 }
903
904
905 /**
906 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
907 *
908 * IEEE Std 802.11r-2008 - 8.5.1.5.4
909 */
wpa_derive_pmk_r1(const u8 * pmk_r0,const u8 * pmk_r0_name,const u8 * r1kh_id,const u8 * s1kh_id,u8 * pmk_r1,u8 * pmk_r1_name)910 void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
911 const u8 *r1kh_id, const u8 *s1kh_id,
912 u8 *pmk_r1, u8 *pmk_r1_name)
913 {
914 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
915 u8 *pos;
916
917 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
918 pos = buf;
919 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
920 pos += FT_R1KH_ID_LEN;
921 os_memcpy(pos, s1kh_id, ETH_ALEN);
922 pos += ETH_ALEN;
923
924 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
925
926 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
927 }
928
929
930 /**
931 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
932 *
933 * IEEE Std 802.11r-2008 - 8.5.1.5.5
934 */
wpa_pmk_r1_to_ptk(const u8 * pmk_r1,const u8 * snonce,const u8 * anonce,const u8 * sta_addr,const u8 * bssid,const u8 * pmk_r1_name,struct wpa_ptk * ptk,u8 * ptk_name,int akmp,int cipher)935 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
936 const u8 *sta_addr, const u8 *bssid,
937 const u8 *pmk_r1_name,
938 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher)
939 {
940 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
941 u8 *pos, hash[32];
942 const u8 *addr[6];
943 size_t len[6];
944 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
945 size_t ptk_len;
946
947 /*
948 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
949 * BSSID || STA-ADDR)
950 */
951 pos = buf;
952 os_memcpy(pos, snonce, WPA_NONCE_LEN);
953 pos += WPA_NONCE_LEN;
954 os_memcpy(pos, anonce, WPA_NONCE_LEN);
955 pos += WPA_NONCE_LEN;
956 os_memcpy(pos, bssid, ETH_ALEN);
957 pos += ETH_ALEN;
958 os_memcpy(pos, sta_addr, ETH_ALEN);
959 pos += ETH_ALEN;
960
961 ptk->kck_len = wpa_kck_len(akmp);
962 ptk->kek_len = wpa_kek_len(akmp);
963 ptk->tk_len = wpa_cipher_key_len(cipher);
964 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
965
966 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, tmp, ptk_len);
967
968 /*
969 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
970 * ANonce || BSSID || STA-ADDR))
971 */
972 addr[0] = pmk_r1_name;
973 len[0] = WPA_PMK_NAME_LEN;
974 addr[1] = (const u8 *) "FT-PTKN";
975 len[1] = 7;
976 addr[2] = snonce;
977 len[2] = WPA_NONCE_LEN;
978 addr[3] = anonce;
979 len[3] = WPA_NONCE_LEN;
980 addr[4] = bssid;
981 len[4] = ETH_ALEN;
982 addr[5] = sta_addr;
983 len[5] = ETH_ALEN;
984
985 sha256_vector(6, addr, len, hash);
986 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
987
988 os_memcpy(ptk->kck, tmp, ptk->kck_len);
989 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
990 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
991
992 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len);
993 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len);
994 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len);
995 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
996
997 os_memset(tmp, 0, sizeof(tmp));
998
999 return 0;
1000 }
1001
1002 #endif /* CONFIG_IEEE80211R */
1003
1004
1005 /**
1006 * rsn_pmkid - Calculate PMK identifier
1007 * @pmk: Pairwise master key
1008 * @pmk_len: Length of pmk in bytes
1009 * @aa: Authenticator address
1010 * @spa: Supplicant address
1011 * @pmkid: Buffer for PMKID
1012 * @use_sha256: Whether to use SHA256-based KDF
1013 *
1014 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
1015 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
1016 */
rsn_pmkid(const u8 * pmk,size_t pmk_len,const u8 * aa,const u8 * spa,u8 * pmkid,int use_sha256)1017 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
1018 u8 *pmkid, int use_sha256)
1019 {
1020 char *title = "PMK Name";
1021 const u8 *addr[3];
1022 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1023 unsigned char hash[SHA256_MAC_LEN];
1024
1025 addr[0] = (u8 *) title;
1026 addr[1] = aa;
1027 addr[2] = spa;
1028
1029 #ifdef CONFIG_IEEE80211W
1030 if (use_sha256)
1031 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
1032 else
1033 #endif /* CONFIG_IEEE80211W */
1034 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
1035 os_memcpy(pmkid, hash, PMKID_LEN);
1036 }
1037
1038
1039 #ifdef CONFIG_SUITEB
1040 /**
1041 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM
1042 * @kck: Key confirmation key
1043 * @kck_len: Length of kck in bytes
1044 * @aa: Authenticator address
1045 * @spa: Supplicant address
1046 * @pmkid: Buffer for PMKID
1047 * Returns: 0 on success, -1 on failure
1048 *
1049 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1050 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA))
1051 */
rsn_pmkid_suite_b(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)1052 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa,
1053 const u8 *spa, u8 *pmkid)
1054 {
1055 char *title = "PMK Name";
1056 const u8 *addr[3];
1057 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1058 unsigned char hash[SHA256_MAC_LEN];
1059
1060 addr[0] = (u8 *) title;
1061 addr[1] = aa;
1062 addr[2] = spa;
1063
1064 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0)
1065 return -1;
1066 os_memcpy(pmkid, hash, PMKID_LEN);
1067 return 0;
1068 }
1069 #endif /* CONFIG_SUITEB */
1070
1071
1072 #ifdef CONFIG_SUITEB192
1073 /**
1074 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM
1075 * @kck: Key confirmation key
1076 * @kck_len: Length of kck in bytes
1077 * @aa: Authenticator address
1078 * @spa: Supplicant address
1079 * @pmkid: Buffer for PMKID
1080 * Returns: 0 on success, -1 on failure
1081 *
1082 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1083 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA))
1084 */
rsn_pmkid_suite_b_192(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)1085 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa,
1086 const u8 *spa, u8 *pmkid)
1087 {
1088 char *title = "PMK Name";
1089 const u8 *addr[3];
1090 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1091 unsigned char hash[SHA384_MAC_LEN];
1092
1093 addr[0] = (u8 *) title;
1094 addr[1] = aa;
1095 addr[2] = spa;
1096
1097 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0)
1098 return -1;
1099 os_memcpy(pmkid, hash, PMKID_LEN);
1100 return 0;
1101 }
1102 #endif /* CONFIG_SUITEB192 */
1103
1104
1105 /**
1106 * wpa_cipher_txt - Convert cipher suite to a text string
1107 * @cipher: Cipher suite (WPA_CIPHER_* enum)
1108 * Returns: Pointer to a text string of the cipher suite name
1109 */
wpa_cipher_txt(int cipher)1110 const char * wpa_cipher_txt(int cipher)
1111 {
1112 switch (cipher) {
1113 case WPA_CIPHER_NONE:
1114 return "NONE";
1115 case WPA_CIPHER_WEP40:
1116 return "WEP-40";
1117 case WPA_CIPHER_WEP104:
1118 return "WEP-104";
1119 case WPA_CIPHER_TKIP:
1120 return "TKIP";
1121 case WPA_CIPHER_CCMP:
1122 return "CCMP";
1123 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
1124 return "CCMP+TKIP";
1125 case WPA_CIPHER_GCMP:
1126 return "GCMP";
1127 case WPA_CIPHER_GCMP_256:
1128 return "GCMP-256";
1129 case WPA_CIPHER_CCMP_256:
1130 return "CCMP-256";
1131 case WPA_CIPHER_GTK_NOT_USED:
1132 return "GTK_NOT_USED";
1133 default:
1134 return "UNKNOWN";
1135 }
1136 }
1137
1138
1139 /**
1140 * wpa_key_mgmt_txt - Convert key management suite to a text string
1141 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
1142 * @proto: WPA/WPA2 version (WPA_PROTO_*)
1143 * Returns: Pointer to a text string of the key management suite name
1144 */
wpa_key_mgmt_txt(int key_mgmt,int proto)1145 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
1146 {
1147 switch (key_mgmt) {
1148 case WPA_KEY_MGMT_IEEE8021X:
1149 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1150 return "WPA2+WPA/IEEE 802.1X/EAP";
1151 return proto == WPA_PROTO_RSN ?
1152 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
1153 case WPA_KEY_MGMT_PSK:
1154 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1155 return "WPA2-PSK+WPA-PSK";
1156 return proto == WPA_PROTO_RSN ?
1157 "WPA2-PSK" : "WPA-PSK";
1158 case WPA_KEY_MGMT_NONE:
1159 return "NONE";
1160 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
1161 return "IEEE 802.1X (no WPA)";
1162 #ifdef CONFIG_IEEE80211R
1163 case WPA_KEY_MGMT_FT_IEEE8021X:
1164 return "FT-EAP";
1165 case WPA_KEY_MGMT_FT_PSK:
1166 return "FT-PSK";
1167 #endif /* CONFIG_IEEE80211R */
1168 #ifdef CONFIG_IEEE80211W
1169 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1170 return "WPA2-EAP-SHA256";
1171 case WPA_KEY_MGMT_PSK_SHA256:
1172 return "WPA2-PSK-SHA256";
1173 #endif /* CONFIG_IEEE80211W */
1174 case WPA_KEY_MGMT_WPS:
1175 return "WPS";
1176 case WPA_KEY_MGMT_SAE:
1177 return "SAE";
1178 case WPA_KEY_MGMT_FT_SAE:
1179 return "FT-SAE";
1180 case WPA_KEY_MGMT_OSEN:
1181 return "OSEN";
1182 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
1183 return "WPA2-EAP-SUITE-B";
1184 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
1185 return "WPA2-EAP-SUITE-B-192";
1186 default:
1187 return "UNKNOWN";
1188 }
1189 }
1190
1191
wpa_akm_to_suite(int akm)1192 u32 wpa_akm_to_suite(int akm)
1193 {
1194 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
1195 return WLAN_AKM_SUITE_FT_8021X;
1196 if (akm & WPA_KEY_MGMT_FT_PSK)
1197 return WLAN_AKM_SUITE_FT_PSK;
1198 if (akm & WPA_KEY_MGMT_IEEE8021X)
1199 return WLAN_AKM_SUITE_8021X;
1200 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
1201 return WLAN_AKM_SUITE_8021X_SHA256;
1202 if (akm & WPA_KEY_MGMT_IEEE8021X)
1203 return WLAN_AKM_SUITE_8021X;
1204 if (akm & WPA_KEY_MGMT_PSK_SHA256)
1205 return WLAN_AKM_SUITE_PSK_SHA256;
1206 if (akm & WPA_KEY_MGMT_PSK)
1207 return WLAN_AKM_SUITE_PSK;
1208 if (akm & WPA_KEY_MGMT_CCKM)
1209 return WLAN_AKM_SUITE_CCKM;
1210 if (akm & WPA_KEY_MGMT_OSEN)
1211 return WLAN_AKM_SUITE_OSEN;
1212 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
1213 return WLAN_AKM_SUITE_8021X_SUITE_B;
1214 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
1215 return WLAN_AKM_SUITE_8021X_SUITE_B_192;
1216 return 0;
1217 }
1218
1219
wpa_compare_rsn_ie(int ft_initial_assoc,const u8 * ie1,size_t ie1len,const u8 * ie2,size_t ie2len)1220 int wpa_compare_rsn_ie(int ft_initial_assoc,
1221 const u8 *ie1, size_t ie1len,
1222 const u8 *ie2, size_t ie2len)
1223 {
1224 if (ie1 == NULL || ie2 == NULL)
1225 return -1;
1226
1227 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
1228 return 0; /* identical IEs */
1229
1230 #ifdef CONFIG_IEEE80211R
1231 if (ft_initial_assoc) {
1232 struct wpa_ie_data ie1d, ie2d;
1233 /*
1234 * The PMKID-List in RSN IE is different between Beacon/Probe
1235 * Response/(Re)Association Request frames and EAPOL-Key
1236 * messages in FT initial mobility domain association. Allow
1237 * for this, but verify that other parts of the RSN IEs are
1238 * identical.
1239 */
1240 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
1241 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
1242 return -1;
1243 if (ie1d.proto == ie2d.proto &&
1244 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
1245 ie1d.group_cipher == ie2d.group_cipher &&
1246 ie1d.key_mgmt == ie2d.key_mgmt &&
1247 ie1d.capabilities == ie2d.capabilities &&
1248 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
1249 return 0;
1250 }
1251 #endif /* CONFIG_IEEE80211R */
1252
1253 return -1;
1254 }
1255
1256
1257 #ifdef CONFIG_IEEE80211R
wpa_insert_pmkid(u8 * ies,size_t ies_len,const u8 * pmkid)1258 int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
1259 {
1260 u8 *start, *end, *rpos, *rend;
1261 int added = 0;
1262
1263 start = ies;
1264 end = ies + ies_len;
1265
1266 while (start < end) {
1267 if (*start == WLAN_EID_RSN)
1268 break;
1269 start += 2 + start[1];
1270 }
1271 if (start >= end) {
1272 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1273 "IEs data");
1274 return -1;
1275 }
1276 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1277 start, 2 + start[1]);
1278
1279 /* Find start of PMKID-Count */
1280 rpos = start + 2;
1281 rend = rpos + start[1];
1282
1283 /* Skip Version and Group Data Cipher Suite */
1284 rpos += 2 + 4;
1285 /* Skip Pairwise Cipher Suite Count and List */
1286 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1287 /* Skip AKM Suite Count and List */
1288 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1289
1290 if (rpos == rend) {
1291 /* Add RSN Capabilities */
1292 os_memmove(rpos + 2, rpos, end - rpos);
1293 *rpos++ = 0;
1294 *rpos++ = 0;
1295 } else {
1296 /* Skip RSN Capabilities */
1297 rpos += 2;
1298 if (rpos > rend) {
1299 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1300 "IEs data");
1301 return -1;
1302 }
1303 }
1304
1305 if (rpos == rend) {
1306 /* No PMKID-Count field included; add it */
1307 os_memmove(rpos + 2 + PMKID_LEN, rpos, end - rpos);
1308 WPA_PUT_LE16(rpos, 1);
1309 rpos += 2;
1310 os_memcpy(rpos, pmkid, PMKID_LEN);
1311 added += 2 + PMKID_LEN;
1312 start[1] += 2 + PMKID_LEN;
1313 } else {
1314 /* PMKID-Count was included; use it */
1315 if (WPA_GET_LE16(rpos) != 0) {
1316 wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
1317 "in RSN IE in EAPOL-Key data");
1318 return -1;
1319 }
1320 WPA_PUT_LE16(rpos, 1);
1321 rpos += 2;
1322 os_memmove(rpos + PMKID_LEN, rpos, end - rpos);
1323 os_memcpy(rpos, pmkid, PMKID_LEN);
1324 added += PMKID_LEN;
1325 start[1] += PMKID_LEN;
1326 }
1327
1328 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1329 "(PMKID inserted)", start, 2 + start[1]);
1330
1331 return added;
1332 }
1333 #endif /* CONFIG_IEEE80211R */
1334
1335
wpa_cipher_key_len(int cipher)1336 int wpa_cipher_key_len(int cipher)
1337 {
1338 switch (cipher) {
1339 case WPA_CIPHER_CCMP_256:
1340 case WPA_CIPHER_GCMP_256:
1341 case WPA_CIPHER_BIP_GMAC_256:
1342 case WPA_CIPHER_BIP_CMAC_256:
1343 return 32;
1344 case WPA_CIPHER_CCMP:
1345 case WPA_CIPHER_GCMP:
1346 case WPA_CIPHER_AES_128_CMAC:
1347 case WPA_CIPHER_BIP_GMAC_128:
1348 return 16;
1349 case WPA_CIPHER_TKIP:
1350 return 32;
1351 }
1352
1353 return 0;
1354 }
1355
1356
wpa_cipher_rsc_len(int cipher)1357 int wpa_cipher_rsc_len(int cipher)
1358 {
1359 switch (cipher) {
1360 case WPA_CIPHER_CCMP_256:
1361 case WPA_CIPHER_GCMP_256:
1362 case WPA_CIPHER_CCMP:
1363 case WPA_CIPHER_GCMP:
1364 case WPA_CIPHER_TKIP:
1365 return 6;
1366 }
1367
1368 return 0;
1369 }
1370
1371
wpa_cipher_to_alg(int cipher)1372 int wpa_cipher_to_alg(int cipher)
1373 {
1374 switch (cipher) {
1375 case WPA_CIPHER_CCMP_256:
1376 return WPA_ALG_CCMP_256;
1377 case WPA_CIPHER_GCMP_256:
1378 return WPA_ALG_GCMP_256;
1379 case WPA_CIPHER_CCMP:
1380 return WPA_ALG_CCMP;
1381 case WPA_CIPHER_GCMP:
1382 return WPA_ALG_GCMP;
1383 case WPA_CIPHER_TKIP:
1384 return WPA_ALG_TKIP;
1385 case WPA_CIPHER_AES_128_CMAC:
1386 return WPA_ALG_IGTK;
1387 case WPA_CIPHER_BIP_GMAC_128:
1388 return WPA_ALG_BIP_GMAC_128;
1389 case WPA_CIPHER_BIP_GMAC_256:
1390 return WPA_ALG_BIP_GMAC_256;
1391 case WPA_CIPHER_BIP_CMAC_256:
1392 return WPA_ALG_BIP_CMAC_256;
1393 }
1394 return WPA_ALG_NONE;
1395 }
1396
1397
wpa_cipher_valid_pairwise(int cipher)1398 int wpa_cipher_valid_pairwise(int cipher)
1399 {
1400 return cipher == WPA_CIPHER_CCMP_256 ||
1401 cipher == WPA_CIPHER_GCMP_256 ||
1402 cipher == WPA_CIPHER_CCMP ||
1403 cipher == WPA_CIPHER_GCMP ||
1404 cipher == WPA_CIPHER_TKIP;
1405 }
1406
1407
wpa_cipher_to_suite(int proto,int cipher)1408 u32 wpa_cipher_to_suite(int proto, int cipher)
1409 {
1410 if (cipher & WPA_CIPHER_CCMP_256)
1411 return RSN_CIPHER_SUITE_CCMP_256;
1412 if (cipher & WPA_CIPHER_GCMP_256)
1413 return RSN_CIPHER_SUITE_GCMP_256;
1414 if (cipher & WPA_CIPHER_CCMP)
1415 return (proto == WPA_PROTO_RSN ?
1416 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1417 if (cipher & WPA_CIPHER_GCMP)
1418 return RSN_CIPHER_SUITE_GCMP;
1419 if (cipher & WPA_CIPHER_TKIP)
1420 return (proto == WPA_PROTO_RSN ?
1421 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1422 if (cipher & WPA_CIPHER_NONE)
1423 return (proto == WPA_PROTO_RSN ?
1424 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1425 if (cipher & WPA_CIPHER_GTK_NOT_USED)
1426 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
1427 if (cipher & WPA_CIPHER_AES_128_CMAC)
1428 return RSN_CIPHER_SUITE_AES_128_CMAC;
1429 if (cipher & WPA_CIPHER_BIP_GMAC_128)
1430 return RSN_CIPHER_SUITE_BIP_GMAC_128;
1431 if (cipher & WPA_CIPHER_BIP_GMAC_256)
1432 return RSN_CIPHER_SUITE_BIP_GMAC_256;
1433 if (cipher & WPA_CIPHER_BIP_CMAC_256)
1434 return RSN_CIPHER_SUITE_BIP_CMAC_256;
1435 return 0;
1436 }
1437
1438
rsn_cipher_put_suites(u8 * start,int ciphers)1439 int rsn_cipher_put_suites(u8 *start, int ciphers)
1440 {
1441 u8 *pos = start;
1442
1443 if (ciphers & WPA_CIPHER_CCMP_256) {
1444 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
1445 pos += RSN_SELECTOR_LEN;
1446 }
1447 if (ciphers & WPA_CIPHER_GCMP_256) {
1448 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
1449 pos += RSN_SELECTOR_LEN;
1450 }
1451 if (ciphers & WPA_CIPHER_CCMP) {
1452 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1453 pos += RSN_SELECTOR_LEN;
1454 }
1455 if (ciphers & WPA_CIPHER_GCMP) {
1456 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1457 pos += RSN_SELECTOR_LEN;
1458 }
1459 if (ciphers & WPA_CIPHER_TKIP) {
1460 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1461 pos += RSN_SELECTOR_LEN;
1462 }
1463 if (ciphers & WPA_CIPHER_NONE) {
1464 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1465 pos += RSN_SELECTOR_LEN;
1466 }
1467
1468 return (pos - start) / RSN_SELECTOR_LEN;
1469 }
1470
1471
wpa_cipher_put_suites(u8 * start,int ciphers)1472 int wpa_cipher_put_suites(u8 *start, int ciphers)
1473 {
1474 u8 *pos = start;
1475
1476 if (ciphers & WPA_CIPHER_CCMP) {
1477 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1478 pos += WPA_SELECTOR_LEN;
1479 }
1480 if (ciphers & WPA_CIPHER_TKIP) {
1481 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1482 pos += WPA_SELECTOR_LEN;
1483 }
1484 if (ciphers & WPA_CIPHER_NONE) {
1485 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1486 pos += WPA_SELECTOR_LEN;
1487 }
1488
1489 return (pos - start) / RSN_SELECTOR_LEN;
1490 }
1491
1492
wpa_pick_pairwise_cipher(int ciphers,int none_allowed)1493 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1494 {
1495 if (ciphers & WPA_CIPHER_CCMP_256)
1496 return WPA_CIPHER_CCMP_256;
1497 if (ciphers & WPA_CIPHER_GCMP_256)
1498 return WPA_CIPHER_GCMP_256;
1499 if (ciphers & WPA_CIPHER_CCMP)
1500 return WPA_CIPHER_CCMP;
1501 if (ciphers & WPA_CIPHER_GCMP)
1502 return WPA_CIPHER_GCMP;
1503 if (ciphers & WPA_CIPHER_TKIP)
1504 return WPA_CIPHER_TKIP;
1505 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1506 return WPA_CIPHER_NONE;
1507 return -1;
1508 }
1509
1510
wpa_pick_group_cipher(int ciphers)1511 int wpa_pick_group_cipher(int ciphers)
1512 {
1513 if (ciphers & WPA_CIPHER_CCMP_256)
1514 return WPA_CIPHER_CCMP_256;
1515 if (ciphers & WPA_CIPHER_GCMP_256)
1516 return WPA_CIPHER_GCMP_256;
1517 if (ciphers & WPA_CIPHER_CCMP)
1518 return WPA_CIPHER_CCMP;
1519 if (ciphers & WPA_CIPHER_GCMP)
1520 return WPA_CIPHER_GCMP;
1521 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
1522 return WPA_CIPHER_GTK_NOT_USED;
1523 if (ciphers & WPA_CIPHER_TKIP)
1524 return WPA_CIPHER_TKIP;
1525 return -1;
1526 }
1527
1528
wpa_parse_cipher(const char * value)1529 int wpa_parse_cipher(const char *value)
1530 {
1531 int val = 0, last;
1532 char *start, *end, *buf;
1533
1534 buf = os_strdup(value);
1535 if (buf == NULL)
1536 return -1;
1537 start = buf;
1538
1539 while (*start != '\0') {
1540 while (*start == ' ' || *start == '\t')
1541 start++;
1542 if (*start == '\0')
1543 break;
1544 end = start;
1545 while (*end != ' ' && *end != '\t' && *end != '\0')
1546 end++;
1547 last = *end == '\0';
1548 *end = '\0';
1549 if (os_strcmp(start, "CCMP-256") == 0)
1550 val |= WPA_CIPHER_CCMP_256;
1551 else if (os_strcmp(start, "GCMP-256") == 0)
1552 val |= WPA_CIPHER_GCMP_256;
1553 else if (os_strcmp(start, "CCMP") == 0)
1554 val |= WPA_CIPHER_CCMP;
1555 else if (os_strcmp(start, "GCMP") == 0)
1556 val |= WPA_CIPHER_GCMP;
1557 else if (os_strcmp(start, "TKIP") == 0)
1558 val |= WPA_CIPHER_TKIP;
1559 else if (os_strcmp(start, "WEP104") == 0)
1560 val |= WPA_CIPHER_WEP104;
1561 else if (os_strcmp(start, "WEP40") == 0)
1562 val |= WPA_CIPHER_WEP40;
1563 else if (os_strcmp(start, "NONE") == 0)
1564 val |= WPA_CIPHER_NONE;
1565 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
1566 val |= WPA_CIPHER_GTK_NOT_USED;
1567 else {
1568 os_free(buf);
1569 return -1;
1570 }
1571
1572 if (last)
1573 break;
1574 start = end + 1;
1575 }
1576 os_free(buf);
1577
1578 return val;
1579 }
1580
1581
wpa_write_ciphers(char * start,char * end,int ciphers,const char * delim)1582 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
1583 {
1584 char *pos = start;
1585 int ret;
1586
1587 if (ciphers & WPA_CIPHER_CCMP_256) {
1588 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
1589 pos == start ? "" : delim);
1590 if (os_snprintf_error(end - pos, ret))
1591 return -1;
1592 pos += ret;
1593 }
1594 if (ciphers & WPA_CIPHER_GCMP_256) {
1595 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
1596 pos == start ? "" : delim);
1597 if (os_snprintf_error(end - pos, ret))
1598 return -1;
1599 pos += ret;
1600 }
1601 if (ciphers & WPA_CIPHER_CCMP) {
1602 ret = os_snprintf(pos, end - pos, "%sCCMP",
1603 pos == start ? "" : delim);
1604 if (os_snprintf_error(end - pos, ret))
1605 return -1;
1606 pos += ret;
1607 }
1608 if (ciphers & WPA_CIPHER_GCMP) {
1609 ret = os_snprintf(pos, end - pos, "%sGCMP",
1610 pos == start ? "" : delim);
1611 if (os_snprintf_error(end - pos, ret))
1612 return -1;
1613 pos += ret;
1614 }
1615 if (ciphers & WPA_CIPHER_TKIP) {
1616 ret = os_snprintf(pos, end - pos, "%sTKIP",
1617 pos == start ? "" : delim);
1618 if (os_snprintf_error(end - pos, ret))
1619 return -1;
1620 pos += ret;
1621 }
1622 if (ciphers & WPA_CIPHER_NONE) {
1623 ret = os_snprintf(pos, end - pos, "%sNONE",
1624 pos == start ? "" : delim);
1625 if (os_snprintf_error(end - pos, ret))
1626 return -1;
1627 pos += ret;
1628 }
1629
1630 return pos - start;
1631 }
1632
1633
wpa_select_ap_group_cipher(int wpa,int wpa_pairwise,int rsn_pairwise)1634 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
1635 {
1636 int pairwise = 0;
1637
1638 /* Select group cipher based on the enabled pairwise cipher suites */
1639 if (wpa & 1)
1640 pairwise |= wpa_pairwise;
1641 if (wpa & 2)
1642 pairwise |= rsn_pairwise;
1643
1644 if (pairwise & WPA_CIPHER_TKIP)
1645 return WPA_CIPHER_TKIP;
1646 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
1647 return WPA_CIPHER_GCMP;
1648 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
1649 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
1650 return WPA_CIPHER_GCMP_256;
1651 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
1652 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
1653 return WPA_CIPHER_CCMP_256;
1654 return WPA_CIPHER_CCMP;
1655 }
1656