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_SUITEB192
174 if (wpa_key_mgmt_sha384(akmp))
175 sha384_prf(pmk, pmk_len, label, data, sizeof(data),
176 tmp, ptk_len);
177 else
178 #endif /* CONFIG_SUITEB192 */
179 #ifdef CONFIG_IEEE80211W
180 if (wpa_key_mgmt_sha256(akmp))
181 sha256_prf(pmk, pmk_len, label, data, sizeof(data),
182 tmp, ptk_len);
183 else
184 #endif /* CONFIG_IEEE80211W */
185 sha1_prf(pmk, pmk_len, label, data, sizeof(data), tmp, ptk_len);
186
187 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
188 MAC2STR(addr1), MAC2STR(addr2));
189 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
190 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
191 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
192 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len);
193
194 os_memcpy(ptk->kck, tmp, ptk->kck_len);
195 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len);
196
197 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
198 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
199
200 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
201 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
202
203 os_memset(tmp, 0, sizeof(tmp));
204 return 0;
205 }
206
207
208 #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)209 int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr,
210 const u8 *ap_addr, u8 transaction_seqnum,
211 const u8 *mdie, size_t mdie_len,
212 const u8 *ftie, size_t ftie_len,
213 const u8 *rsnie, size_t rsnie_len,
214 const u8 *ric, size_t ric_len, u8 *mic)
215 {
216 const u8 *addr[9];
217 size_t len[9];
218 size_t i, num_elem = 0;
219 u8 zero_mic[16];
220
221 if (kck_len != 16) {
222 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u",
223 (unsigned int) kck_len);
224 return -1;
225 }
226
227 addr[num_elem] = sta_addr;
228 len[num_elem] = ETH_ALEN;
229 num_elem++;
230
231 addr[num_elem] = ap_addr;
232 len[num_elem] = ETH_ALEN;
233 num_elem++;
234
235 addr[num_elem] = &transaction_seqnum;
236 len[num_elem] = 1;
237 num_elem++;
238
239 if (rsnie) {
240 addr[num_elem] = rsnie;
241 len[num_elem] = rsnie_len;
242 num_elem++;
243 }
244 if (mdie) {
245 addr[num_elem] = mdie;
246 len[num_elem] = mdie_len;
247 num_elem++;
248 }
249 if (ftie) {
250 if (ftie_len < 2 + sizeof(struct rsn_ftie))
251 return -1;
252
253 /* IE hdr and mic_control */
254 addr[num_elem] = ftie;
255 len[num_elem] = 2 + 2;
256 num_elem++;
257
258 /* MIC field with all zeros */
259 os_memset(zero_mic, 0, sizeof(zero_mic));
260 addr[num_elem] = zero_mic;
261 len[num_elem] = sizeof(zero_mic);
262 num_elem++;
263
264 /* Rest of FTIE */
265 addr[num_elem] = ftie + 2 + 2 + 16;
266 len[num_elem] = ftie_len - (2 + 2 + 16);
267 num_elem++;
268 }
269 if (ric) {
270 addr[num_elem] = ric;
271 len[num_elem] = ric_len;
272 num_elem++;
273 }
274
275 for (i = 0; i < num_elem; i++)
276 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]);
277 if (omac1_aes_128_vector(kck, num_elem, addr, len, mic))
278 return -1;
279
280 return 0;
281 }
282
283
wpa_ft_parse_ftie(const u8 * ie,size_t ie_len,struct wpa_ft_ies * parse)284 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
285 struct wpa_ft_ies *parse)
286 {
287 const u8 *end, *pos;
288
289 parse->ftie = ie;
290 parse->ftie_len = ie_len;
291
292 pos = ie + sizeof(struct rsn_ftie);
293 end = ie + ie_len;
294
295 while (end - pos >= 2) {
296 u8 id, len;
297
298 id = *pos++;
299 len = *pos++;
300 if (len > end - pos)
301 break;
302
303 switch (id) {
304 case FTIE_SUBELEM_R1KH_ID:
305 if (len != FT_R1KH_ID_LEN) {
306 wpa_printf(MSG_DEBUG,
307 "FT: Invalid R1KH-ID length in FTIE: %d",
308 len);
309 return -1;
310 }
311 parse->r1kh_id = pos;
312 break;
313 case FTIE_SUBELEM_GTK:
314 parse->gtk = pos;
315 parse->gtk_len = len;
316 break;
317 case FTIE_SUBELEM_R0KH_ID:
318 if (len < 1 || len > FT_R0KH_ID_MAX_LEN) {
319 wpa_printf(MSG_DEBUG,
320 "FT: Invalid R0KH-ID length in FTIE: %d",
321 len);
322 return -1;
323 }
324 parse->r0kh_id = pos;
325 parse->r0kh_id_len = len;
326 break;
327 #ifdef CONFIG_IEEE80211W
328 case FTIE_SUBELEM_IGTK:
329 parse->igtk = pos;
330 parse->igtk_len = len;
331 break;
332 #endif /* CONFIG_IEEE80211W */
333 }
334
335 pos += len;
336 }
337
338 return 0;
339 }
340
341
wpa_ft_parse_ies(const u8 * ies,size_t ies_len,struct wpa_ft_ies * parse)342 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
343 struct wpa_ft_ies *parse)
344 {
345 const u8 *end, *pos;
346 struct wpa_ie_data data;
347 int ret;
348 const struct rsn_ftie *ftie;
349 int prot_ie_count = 0;
350
351 os_memset(parse, 0, sizeof(*parse));
352 if (ies == NULL)
353 return 0;
354
355 pos = ies;
356 end = ies + ies_len;
357 while (end - pos >= 2) {
358 u8 id, len;
359
360 id = *pos++;
361 len = *pos++;
362 if (len > end - pos)
363 break;
364
365 switch (id) {
366 case WLAN_EID_RSN:
367 parse->rsn = pos;
368 parse->rsn_len = len;
369 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
370 parse->rsn_len + 2,
371 &data);
372 if (ret < 0) {
373 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
374 "RSN IE: %d", ret);
375 return -1;
376 }
377 if (data.num_pmkid == 1 && data.pmkid)
378 parse->rsn_pmkid = data.pmkid;
379 break;
380 case WLAN_EID_MOBILITY_DOMAIN:
381 if (len < sizeof(struct rsn_mdie))
382 return -1;
383 parse->mdie = pos;
384 parse->mdie_len = len;
385 break;
386 case WLAN_EID_FAST_BSS_TRANSITION:
387 if (len < sizeof(*ftie))
388 return -1;
389 ftie = (const struct rsn_ftie *) pos;
390 prot_ie_count = ftie->mic_control[1];
391 if (wpa_ft_parse_ftie(pos, len, parse) < 0)
392 return -1;
393 break;
394 case WLAN_EID_TIMEOUT_INTERVAL:
395 if (len != 5)
396 break;
397 parse->tie = pos;
398 parse->tie_len = len;
399 break;
400 case WLAN_EID_RIC_DATA:
401 if (parse->ric == NULL)
402 parse->ric = pos - 2;
403 break;
404 }
405
406 pos += len;
407 }
408
409 if (prot_ie_count == 0)
410 return 0; /* no MIC */
411
412 /*
413 * Check that the protected IE count matches with IEs included in the
414 * frame.
415 */
416 if (parse->rsn)
417 prot_ie_count--;
418 if (parse->mdie)
419 prot_ie_count--;
420 if (parse->ftie)
421 prot_ie_count--;
422 if (prot_ie_count < 0) {
423 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
424 "the protected IE count");
425 return -1;
426 }
427
428 if (prot_ie_count == 0 && parse->ric) {
429 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
430 "included in protected IE count");
431 return -1;
432 }
433
434 /* Determine the end of the RIC IE(s) */
435 if (parse->ric) {
436 pos = parse->ric;
437 while (end - pos >= 2 && 2 + pos[1] <= end - pos &&
438 prot_ie_count) {
439 prot_ie_count--;
440 pos += 2 + pos[1];
441 }
442 parse->ric_len = pos - parse->ric;
443 }
444 if (prot_ie_count) {
445 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
446 "frame", (int) prot_ie_count);
447 return -1;
448 }
449
450 return 0;
451 }
452 #endif /* CONFIG_IEEE80211R */
453
454
rsn_selector_to_bitfield(const u8 * s)455 static int rsn_selector_to_bitfield(const u8 *s)
456 {
457 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
458 return WPA_CIPHER_NONE;
459 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
460 return WPA_CIPHER_TKIP;
461 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
462 return WPA_CIPHER_CCMP;
463 #ifdef CONFIG_IEEE80211W
464 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
465 return WPA_CIPHER_AES_128_CMAC;
466 #endif /* CONFIG_IEEE80211W */
467 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
468 return WPA_CIPHER_GCMP;
469 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
470 return WPA_CIPHER_CCMP_256;
471 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
472 return WPA_CIPHER_GCMP_256;
473 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
474 return WPA_CIPHER_BIP_GMAC_128;
475 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
476 return WPA_CIPHER_BIP_GMAC_256;
477 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
478 return WPA_CIPHER_BIP_CMAC_256;
479 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
480 return WPA_CIPHER_GTK_NOT_USED;
481 return 0;
482 }
483
484
rsn_key_mgmt_to_bitfield(const u8 * s)485 static int rsn_key_mgmt_to_bitfield(const u8 *s)
486 {
487 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
488 return WPA_KEY_MGMT_IEEE8021X;
489 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
490 return WPA_KEY_MGMT_PSK;
491 #ifdef CONFIG_IEEE80211R
492 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
493 return WPA_KEY_MGMT_FT_IEEE8021X;
494 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
495 return WPA_KEY_MGMT_FT_PSK;
496 #endif /* CONFIG_IEEE80211R */
497 #ifdef CONFIG_IEEE80211W
498 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
499 return WPA_KEY_MGMT_IEEE8021X_SHA256;
500 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
501 return WPA_KEY_MGMT_PSK_SHA256;
502 #endif /* CONFIG_IEEE80211W */
503 #ifdef CONFIG_SAE
504 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
505 return WPA_KEY_MGMT_SAE;
506 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
507 return WPA_KEY_MGMT_FT_SAE;
508 #endif /* CONFIG_SAE */
509 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
510 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
511 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192)
512 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
513 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN)
514 return WPA_KEY_MGMT_OSEN;
515 return 0;
516 }
517
518
wpa_cipher_valid_group(int cipher)519 int wpa_cipher_valid_group(int cipher)
520 {
521 return wpa_cipher_valid_pairwise(cipher) ||
522 cipher == WPA_CIPHER_GTK_NOT_USED;
523 }
524
525
526 #ifdef CONFIG_IEEE80211W
wpa_cipher_valid_mgmt_group(int cipher)527 int wpa_cipher_valid_mgmt_group(int cipher)
528 {
529 return cipher == WPA_CIPHER_AES_128_CMAC ||
530 cipher == WPA_CIPHER_BIP_GMAC_128 ||
531 cipher == WPA_CIPHER_BIP_GMAC_256 ||
532 cipher == WPA_CIPHER_BIP_CMAC_256;
533 }
534 #endif /* CONFIG_IEEE80211W */
535
536
537 /**
538 * wpa_parse_wpa_ie_rsn - Parse RSN IE
539 * @rsn_ie: Buffer containing RSN IE
540 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
541 * @data: Pointer to structure that will be filled in with parsed data
542 * Returns: 0 on success, <0 on failure
543 */
wpa_parse_wpa_ie_rsn(const u8 * rsn_ie,size_t rsn_ie_len,struct wpa_ie_data * data)544 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
545 struct wpa_ie_data *data)
546 {
547 const u8 *pos;
548 int left;
549 int i, count;
550
551 os_memset(data, 0, sizeof(*data));
552 data->proto = WPA_PROTO_RSN;
553 data->pairwise_cipher = WPA_CIPHER_CCMP;
554 data->group_cipher = WPA_CIPHER_CCMP;
555 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
556 data->capabilities = 0;
557 data->pmkid = NULL;
558 data->num_pmkid = 0;
559 #ifdef CONFIG_IEEE80211W
560 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
561 #else /* CONFIG_IEEE80211W */
562 data->mgmt_group_cipher = 0;
563 #endif /* CONFIG_IEEE80211W */
564
565 if (rsn_ie_len == 0) {
566 /* No RSN IE - fail silently */
567 return -1;
568 }
569
570 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
571 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
572 __func__, (unsigned long) rsn_ie_len);
573 return -1;
574 }
575
576 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 &&
577 rsn_ie[1] == rsn_ie_len - 2 &&
578 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) {
579 pos = rsn_ie + 6;
580 left = rsn_ie_len - 6;
581
582 data->proto = WPA_PROTO_OSEN;
583 } else {
584 const struct rsn_ie_hdr *hdr;
585
586 hdr = (const struct rsn_ie_hdr *) rsn_ie;
587
588 if (hdr->elem_id != WLAN_EID_RSN ||
589 hdr->len != rsn_ie_len - 2 ||
590 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
591 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
592 __func__);
593 return -2;
594 }
595
596 pos = (const u8 *) (hdr + 1);
597 left = rsn_ie_len - sizeof(*hdr);
598 }
599
600 if (left >= RSN_SELECTOR_LEN) {
601 data->group_cipher = rsn_selector_to_bitfield(pos);
602 if (!wpa_cipher_valid_group(data->group_cipher)) {
603 wpa_printf(MSG_DEBUG,
604 "%s: invalid group cipher 0x%x (%08x)",
605 __func__, data->group_cipher,
606 WPA_GET_BE32(pos));
607 return -1;
608 }
609 pos += RSN_SELECTOR_LEN;
610 left -= RSN_SELECTOR_LEN;
611 } else if (left > 0) {
612 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
613 __func__, left);
614 return -3;
615 }
616
617 if (left >= 2) {
618 data->pairwise_cipher = 0;
619 count = WPA_GET_LE16(pos);
620 pos += 2;
621 left -= 2;
622 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
623 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
624 "count %u left %u", __func__, count, left);
625 return -4;
626 }
627 for (i = 0; i < count; i++) {
628 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
629 pos += RSN_SELECTOR_LEN;
630 left -= RSN_SELECTOR_LEN;
631 }
632 #ifdef CONFIG_IEEE80211W
633 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
634 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
635 "pairwise cipher", __func__);
636 return -1;
637 }
638 #endif /* CONFIG_IEEE80211W */
639 } else if (left == 1) {
640 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
641 __func__);
642 return -5;
643 }
644
645 if (left >= 2) {
646 data->key_mgmt = 0;
647 count = WPA_GET_LE16(pos);
648 pos += 2;
649 left -= 2;
650 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
651 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
652 "count %u left %u", __func__, count, left);
653 return -6;
654 }
655 for (i = 0; i < count; i++) {
656 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
657 pos += RSN_SELECTOR_LEN;
658 left -= RSN_SELECTOR_LEN;
659 }
660 } else if (left == 1) {
661 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
662 __func__);
663 return -7;
664 }
665
666 if (left >= 2) {
667 data->capabilities = WPA_GET_LE16(pos);
668 pos += 2;
669 left -= 2;
670 }
671
672 if (left >= 2) {
673 u16 num_pmkid = WPA_GET_LE16(pos);
674 pos += 2;
675 left -= 2;
676 if (num_pmkid > (unsigned int) left / PMKID_LEN) {
677 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
678 "(num_pmkid=%u left=%d)",
679 __func__, num_pmkid, left);
680 data->num_pmkid = 0;
681 return -9;
682 } else {
683 data->num_pmkid = num_pmkid;
684 data->pmkid = pos;
685 pos += data->num_pmkid * PMKID_LEN;
686 left -= data->num_pmkid * PMKID_LEN;
687 }
688 }
689
690 #ifdef CONFIG_IEEE80211W
691 if (left >= 4) {
692 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
693 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
694 wpa_printf(MSG_DEBUG,
695 "%s: Unsupported management group cipher 0x%x (%08x)",
696 __func__, data->mgmt_group_cipher,
697 WPA_GET_BE32(pos));
698 return -10;
699 }
700 pos += RSN_SELECTOR_LEN;
701 left -= RSN_SELECTOR_LEN;
702 }
703 #endif /* CONFIG_IEEE80211W */
704
705 if (left > 0) {
706 wpa_hexdump(MSG_DEBUG,
707 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
708 pos, left);
709 }
710
711 return 0;
712 }
713
714
wpa_selector_to_bitfield(const u8 * s)715 static int wpa_selector_to_bitfield(const u8 *s)
716 {
717 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
718 return WPA_CIPHER_NONE;
719 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
720 return WPA_CIPHER_TKIP;
721 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
722 return WPA_CIPHER_CCMP;
723 return 0;
724 }
725
726
wpa_key_mgmt_to_bitfield(const u8 * s)727 static int wpa_key_mgmt_to_bitfield(const u8 *s)
728 {
729 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
730 return WPA_KEY_MGMT_IEEE8021X;
731 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
732 return WPA_KEY_MGMT_PSK;
733 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
734 return WPA_KEY_MGMT_WPA_NONE;
735 return 0;
736 }
737
738
wpa_parse_wpa_ie_wpa(const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ie_data * data)739 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
740 struct wpa_ie_data *data)
741 {
742 const struct wpa_ie_hdr *hdr;
743 const u8 *pos;
744 int left;
745 int i, count;
746
747 os_memset(data, 0, sizeof(*data));
748 data->proto = WPA_PROTO_WPA;
749 data->pairwise_cipher = WPA_CIPHER_TKIP;
750 data->group_cipher = WPA_CIPHER_TKIP;
751 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
752 data->capabilities = 0;
753 data->pmkid = NULL;
754 data->num_pmkid = 0;
755 data->mgmt_group_cipher = 0;
756
757 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
758 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
759 __func__, (unsigned long) wpa_ie_len);
760 return -1;
761 }
762
763 hdr = (const struct wpa_ie_hdr *) wpa_ie;
764
765 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
766 hdr->len != wpa_ie_len - 2 ||
767 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
768 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
769 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
770 __func__);
771 return -2;
772 }
773
774 pos = (const u8 *) (hdr + 1);
775 left = wpa_ie_len - sizeof(*hdr);
776
777 if (left >= WPA_SELECTOR_LEN) {
778 data->group_cipher = wpa_selector_to_bitfield(pos);
779 pos += WPA_SELECTOR_LEN;
780 left -= WPA_SELECTOR_LEN;
781 } else if (left > 0) {
782 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
783 __func__, left);
784 return -3;
785 }
786
787 if (left >= 2) {
788 data->pairwise_cipher = 0;
789 count = WPA_GET_LE16(pos);
790 pos += 2;
791 left -= 2;
792 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
793 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
794 "count %u left %u", __func__, count, left);
795 return -4;
796 }
797 for (i = 0; i < count; i++) {
798 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
799 pos += WPA_SELECTOR_LEN;
800 left -= WPA_SELECTOR_LEN;
801 }
802 } else if (left == 1) {
803 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
804 __func__);
805 return -5;
806 }
807
808 if (left >= 2) {
809 data->key_mgmt = 0;
810 count = WPA_GET_LE16(pos);
811 pos += 2;
812 left -= 2;
813 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
814 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
815 "count %u left %u", __func__, count, left);
816 return -6;
817 }
818 for (i = 0; i < count; i++) {
819 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
820 pos += WPA_SELECTOR_LEN;
821 left -= WPA_SELECTOR_LEN;
822 }
823 } else if (left == 1) {
824 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
825 __func__);
826 return -7;
827 }
828
829 if (left >= 2) {
830 data->capabilities = WPA_GET_LE16(pos);
831 pos += 2;
832 left -= 2;
833 }
834
835 if (left > 0) {
836 wpa_hexdump(MSG_DEBUG,
837 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
838 pos, left);
839 }
840
841 return 0;
842 }
843
844
845 #ifdef CONFIG_IEEE80211R
846
847 /**
848 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
849 *
850 * IEEE Std 802.11r-2008 - 8.5.1.5.3
851 */
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)852 void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
853 const u8 *ssid, size_t ssid_len,
854 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
855 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
856 {
857 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
858 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
859 u8 *pos, r0_key_data[48], hash[32];
860 const u8 *addr[2];
861 size_t len[2];
862
863 /*
864 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
865 * SSIDlength || SSID || MDID || R0KHlength ||
866 * R0KH-ID || S0KH-ID)
867 * XXKey is either the second 256 bits of MSK or PSK.
868 * PMK-R0 = L(R0-Key-Data, 0, 256)
869 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
870 */
871 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
872 return;
873 pos = buf;
874 *pos++ = ssid_len;
875 os_memcpy(pos, ssid, ssid_len);
876 pos += ssid_len;
877 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
878 pos += MOBILITY_DOMAIN_ID_LEN;
879 *pos++ = r0kh_id_len;
880 os_memcpy(pos, r0kh_id, r0kh_id_len);
881 pos += r0kh_id_len;
882 os_memcpy(pos, s0kh_id, ETH_ALEN);
883 pos += ETH_ALEN;
884
885 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
886 r0_key_data, sizeof(r0_key_data));
887 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
888
889 /*
890 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
891 */
892 addr[0] = (const u8 *) "FT-R0N";
893 len[0] = 6;
894 addr[1] = r0_key_data + PMK_LEN;
895 len[1] = 16;
896
897 sha256_vector(2, addr, len, hash);
898 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
899 }
900
901
902 /**
903 * wpa_derive_pmk_r1_name - Derive PMKR1Name
904 *
905 * IEEE Std 802.11r-2008 - 8.5.1.5.4
906 */
wpa_derive_pmk_r1_name(const u8 * pmk_r0_name,const u8 * r1kh_id,const u8 * s1kh_id,u8 * pmk_r1_name)907 void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
908 const u8 *s1kh_id, u8 *pmk_r1_name)
909 {
910 u8 hash[32];
911 const u8 *addr[4];
912 size_t len[4];
913
914 /*
915 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
916 * R1KH-ID || S1KH-ID))
917 */
918 addr[0] = (const u8 *) "FT-R1N";
919 len[0] = 6;
920 addr[1] = pmk_r0_name;
921 len[1] = WPA_PMK_NAME_LEN;
922 addr[2] = r1kh_id;
923 len[2] = FT_R1KH_ID_LEN;
924 addr[3] = s1kh_id;
925 len[3] = ETH_ALEN;
926
927 sha256_vector(4, addr, len, hash);
928 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
929 }
930
931
932 /**
933 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
934 *
935 * IEEE Std 802.11r-2008 - 8.5.1.5.4
936 */
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)937 void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
938 const u8 *r1kh_id, const u8 *s1kh_id,
939 u8 *pmk_r1, u8 *pmk_r1_name)
940 {
941 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
942 u8 *pos;
943
944 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
945 pos = buf;
946 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
947 pos += FT_R1KH_ID_LEN;
948 os_memcpy(pos, s1kh_id, ETH_ALEN);
949 pos += ETH_ALEN;
950
951 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
952
953 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
954 }
955
956
957 /**
958 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
959 *
960 * IEEE Std 802.11r-2008 - 8.5.1.5.5
961 */
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)962 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
963 const u8 *sta_addr, const u8 *bssid,
964 const u8 *pmk_r1_name,
965 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher)
966 {
967 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
968 u8 *pos, hash[32];
969 const u8 *addr[6];
970 size_t len[6];
971 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
972 size_t ptk_len;
973
974 /*
975 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
976 * BSSID || STA-ADDR)
977 */
978 pos = buf;
979 os_memcpy(pos, snonce, WPA_NONCE_LEN);
980 pos += WPA_NONCE_LEN;
981 os_memcpy(pos, anonce, WPA_NONCE_LEN);
982 pos += WPA_NONCE_LEN;
983 os_memcpy(pos, bssid, ETH_ALEN);
984 pos += ETH_ALEN;
985 os_memcpy(pos, sta_addr, ETH_ALEN);
986 pos += ETH_ALEN;
987
988 ptk->kck_len = wpa_kck_len(akmp);
989 ptk->kek_len = wpa_kek_len(akmp);
990 ptk->tk_len = wpa_cipher_key_len(cipher);
991 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
992
993 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, tmp, ptk_len);
994
995 /*
996 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
997 * ANonce || BSSID || STA-ADDR))
998 */
999 addr[0] = pmk_r1_name;
1000 len[0] = WPA_PMK_NAME_LEN;
1001 addr[1] = (const u8 *) "FT-PTKN";
1002 len[1] = 7;
1003 addr[2] = snonce;
1004 len[2] = WPA_NONCE_LEN;
1005 addr[3] = anonce;
1006 len[3] = WPA_NONCE_LEN;
1007 addr[4] = bssid;
1008 len[4] = ETH_ALEN;
1009 addr[5] = sta_addr;
1010 len[5] = ETH_ALEN;
1011
1012 sha256_vector(6, addr, len, hash);
1013 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
1014
1015 os_memcpy(ptk->kck, tmp, ptk->kck_len);
1016 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
1017 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
1018
1019 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len);
1020 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len);
1021 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len);
1022 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1023
1024 os_memset(tmp, 0, sizeof(tmp));
1025
1026 return 0;
1027 }
1028
1029 #endif /* CONFIG_IEEE80211R */
1030
1031
1032 /**
1033 * rsn_pmkid - Calculate PMK identifier
1034 * @pmk: Pairwise master key
1035 * @pmk_len: Length of pmk in bytes
1036 * @aa: Authenticator address
1037 * @spa: Supplicant address
1038 * @pmkid: Buffer for PMKID
1039 * @use_sha256: Whether to use SHA256-based KDF
1040 *
1041 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
1042 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
1043 */
rsn_pmkid(const u8 * pmk,size_t pmk_len,const u8 * aa,const u8 * spa,u8 * pmkid,int use_sha256)1044 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
1045 u8 *pmkid, int use_sha256)
1046 {
1047 char *title = "PMK Name";
1048 const u8 *addr[3];
1049 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1050 unsigned char hash[SHA256_MAC_LEN];
1051
1052 addr[0] = (u8 *) title;
1053 addr[1] = aa;
1054 addr[2] = spa;
1055
1056 #ifdef CONFIG_IEEE80211W
1057 if (use_sha256)
1058 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
1059 else
1060 #endif /* CONFIG_IEEE80211W */
1061 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
1062 os_memcpy(pmkid, hash, PMKID_LEN);
1063 }
1064
1065
1066 #ifdef CONFIG_SUITEB
1067 /**
1068 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM
1069 * @kck: Key confirmation key
1070 * @kck_len: Length of kck in bytes
1071 * @aa: Authenticator address
1072 * @spa: Supplicant address
1073 * @pmkid: Buffer for PMKID
1074 * Returns: 0 on success, -1 on failure
1075 *
1076 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1077 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA))
1078 */
rsn_pmkid_suite_b(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)1079 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa,
1080 const u8 *spa, u8 *pmkid)
1081 {
1082 char *title = "PMK Name";
1083 const u8 *addr[3];
1084 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1085 unsigned char hash[SHA256_MAC_LEN];
1086
1087 addr[0] = (u8 *) title;
1088 addr[1] = aa;
1089 addr[2] = spa;
1090
1091 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0)
1092 return -1;
1093 os_memcpy(pmkid, hash, PMKID_LEN);
1094 return 0;
1095 }
1096 #endif /* CONFIG_SUITEB */
1097
1098
1099 #ifdef CONFIG_SUITEB192
1100 /**
1101 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM
1102 * @kck: Key confirmation key
1103 * @kck_len: Length of kck in bytes
1104 * @aa: Authenticator address
1105 * @spa: Supplicant address
1106 * @pmkid: Buffer for PMKID
1107 * Returns: 0 on success, -1 on failure
1108 *
1109 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1110 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA))
1111 */
rsn_pmkid_suite_b_192(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)1112 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa,
1113 const u8 *spa, u8 *pmkid)
1114 {
1115 char *title = "PMK Name";
1116 const u8 *addr[3];
1117 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1118 unsigned char hash[SHA384_MAC_LEN];
1119
1120 addr[0] = (u8 *) title;
1121 addr[1] = aa;
1122 addr[2] = spa;
1123
1124 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0)
1125 return -1;
1126 os_memcpy(pmkid, hash, PMKID_LEN);
1127 return 0;
1128 }
1129 #endif /* CONFIG_SUITEB192 */
1130
1131
1132 /**
1133 * wpa_cipher_txt - Convert cipher suite to a text string
1134 * @cipher: Cipher suite (WPA_CIPHER_* enum)
1135 * Returns: Pointer to a text string of the cipher suite name
1136 */
wpa_cipher_txt(int cipher)1137 const char * wpa_cipher_txt(int cipher)
1138 {
1139 switch (cipher) {
1140 case WPA_CIPHER_NONE:
1141 return "NONE";
1142 case WPA_CIPHER_WEP40:
1143 return "WEP-40";
1144 case WPA_CIPHER_WEP104:
1145 return "WEP-104";
1146 case WPA_CIPHER_TKIP:
1147 return "TKIP";
1148 case WPA_CIPHER_CCMP:
1149 return "CCMP";
1150 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
1151 return "CCMP+TKIP";
1152 case WPA_CIPHER_GCMP:
1153 return "GCMP";
1154 case WPA_CIPHER_GCMP_256:
1155 return "GCMP-256";
1156 case WPA_CIPHER_CCMP_256:
1157 return "CCMP-256";
1158 case WPA_CIPHER_GTK_NOT_USED:
1159 return "GTK_NOT_USED";
1160 default:
1161 return "UNKNOWN";
1162 }
1163 }
1164
1165
1166 /**
1167 * wpa_key_mgmt_txt - Convert key management suite to a text string
1168 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
1169 * @proto: WPA/WPA2 version (WPA_PROTO_*)
1170 * Returns: Pointer to a text string of the key management suite name
1171 */
wpa_key_mgmt_txt(int key_mgmt,int proto)1172 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
1173 {
1174 switch (key_mgmt) {
1175 case WPA_KEY_MGMT_IEEE8021X:
1176 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1177 return "WPA2+WPA/IEEE 802.1X/EAP";
1178 return proto == WPA_PROTO_RSN ?
1179 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
1180 case WPA_KEY_MGMT_PSK:
1181 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1182 return "WPA2-PSK+WPA-PSK";
1183 return proto == WPA_PROTO_RSN ?
1184 "WPA2-PSK" : "WPA-PSK";
1185 case WPA_KEY_MGMT_NONE:
1186 return "NONE";
1187 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
1188 return "IEEE 802.1X (no WPA)";
1189 #ifdef CONFIG_IEEE80211R
1190 case WPA_KEY_MGMT_FT_IEEE8021X:
1191 return "FT-EAP";
1192 case WPA_KEY_MGMT_FT_PSK:
1193 return "FT-PSK";
1194 #endif /* CONFIG_IEEE80211R */
1195 #ifdef CONFIG_IEEE80211W
1196 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1197 return "WPA2-EAP-SHA256";
1198 case WPA_KEY_MGMT_PSK_SHA256:
1199 return "WPA2-PSK-SHA256";
1200 #endif /* CONFIG_IEEE80211W */
1201 case WPA_KEY_MGMT_WPS:
1202 return "WPS";
1203 case WPA_KEY_MGMT_SAE:
1204 return "SAE";
1205 case WPA_KEY_MGMT_FT_SAE:
1206 return "FT-SAE";
1207 case WPA_KEY_MGMT_OSEN:
1208 return "OSEN";
1209 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
1210 return "WPA2-EAP-SUITE-B";
1211 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
1212 return "WPA2-EAP-SUITE-B-192";
1213 default:
1214 return "UNKNOWN";
1215 }
1216 }
1217
1218
wpa_akm_to_suite(int akm)1219 u32 wpa_akm_to_suite(int akm)
1220 {
1221 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
1222 return WLAN_AKM_SUITE_FT_8021X;
1223 if (akm & WPA_KEY_MGMT_FT_PSK)
1224 return WLAN_AKM_SUITE_FT_PSK;
1225 if (akm & WPA_KEY_MGMT_IEEE8021X)
1226 return WLAN_AKM_SUITE_8021X;
1227 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
1228 return WLAN_AKM_SUITE_8021X_SHA256;
1229 if (akm & WPA_KEY_MGMT_IEEE8021X)
1230 return WLAN_AKM_SUITE_8021X;
1231 if (akm & WPA_KEY_MGMT_PSK_SHA256)
1232 return WLAN_AKM_SUITE_PSK_SHA256;
1233 if (akm & WPA_KEY_MGMT_PSK)
1234 return WLAN_AKM_SUITE_PSK;
1235 if (akm & WPA_KEY_MGMT_CCKM)
1236 return WLAN_AKM_SUITE_CCKM;
1237 if (akm & WPA_KEY_MGMT_OSEN)
1238 return WLAN_AKM_SUITE_OSEN;
1239 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
1240 return WLAN_AKM_SUITE_8021X_SUITE_B;
1241 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
1242 return WLAN_AKM_SUITE_8021X_SUITE_B_192;
1243 return 0;
1244 }
1245
1246
wpa_compare_rsn_ie(int ft_initial_assoc,const u8 * ie1,size_t ie1len,const u8 * ie2,size_t ie2len)1247 int wpa_compare_rsn_ie(int ft_initial_assoc,
1248 const u8 *ie1, size_t ie1len,
1249 const u8 *ie2, size_t ie2len)
1250 {
1251 if (ie1 == NULL || ie2 == NULL)
1252 return -1;
1253
1254 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
1255 return 0; /* identical IEs */
1256
1257 #ifdef CONFIG_IEEE80211R
1258 if (ft_initial_assoc) {
1259 struct wpa_ie_data ie1d, ie2d;
1260 /*
1261 * The PMKID-List in RSN IE is different between Beacon/Probe
1262 * Response/(Re)Association Request frames and EAPOL-Key
1263 * messages in FT initial mobility domain association. Allow
1264 * for this, but verify that other parts of the RSN IEs are
1265 * identical.
1266 */
1267 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
1268 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
1269 return -1;
1270 if (ie1d.proto == ie2d.proto &&
1271 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
1272 ie1d.group_cipher == ie2d.group_cipher &&
1273 ie1d.key_mgmt == ie2d.key_mgmt &&
1274 ie1d.capabilities == ie2d.capabilities &&
1275 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
1276 return 0;
1277 }
1278 #endif /* CONFIG_IEEE80211R */
1279
1280 return -1;
1281 }
1282
1283
1284 #ifdef CONFIG_IEEE80211R
wpa_insert_pmkid(u8 * ies,size_t * ies_len,const u8 * pmkid)1285 int wpa_insert_pmkid(u8 *ies, size_t *ies_len, const u8 *pmkid)
1286 {
1287 u8 *start, *end, *rpos, *rend;
1288 int added = 0;
1289
1290 start = ies;
1291 end = ies + *ies_len;
1292
1293 while (start < end) {
1294 if (*start == WLAN_EID_RSN)
1295 break;
1296 start += 2 + start[1];
1297 }
1298 if (start >= end) {
1299 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1300 "IEs data");
1301 return -1;
1302 }
1303 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1304 start, 2 + start[1]);
1305
1306 /* Find start of PMKID-Count */
1307 rpos = start + 2;
1308 rend = rpos + start[1];
1309
1310 /* Skip Version and Group Data Cipher Suite */
1311 rpos += 2 + 4;
1312 /* Skip Pairwise Cipher Suite Count and List */
1313 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1314 /* Skip AKM Suite Count and List */
1315 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1316
1317 if (rpos == rend) {
1318 /* Add RSN Capabilities */
1319 os_memmove(rpos + 2, rpos, end - rpos);
1320 *rpos++ = 0;
1321 *rpos++ = 0;
1322 added += 2;
1323 start[1] += 2;
1324 rend = rpos;
1325 } else {
1326 /* Skip RSN Capabilities */
1327 rpos += 2;
1328 if (rpos > rend) {
1329 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1330 "IEs data");
1331 return -1;
1332 }
1333 }
1334
1335 if (rpos == rend) {
1336 /* No PMKID-Count field included; add it */
1337 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos);
1338 WPA_PUT_LE16(rpos, 1);
1339 rpos += 2;
1340 os_memcpy(rpos, pmkid, PMKID_LEN);
1341 added += 2 + PMKID_LEN;
1342 start[1] += 2 + PMKID_LEN;
1343 } else {
1344 u16 num_pmkid;
1345
1346 if (rend - rpos < 2)
1347 return -1;
1348 num_pmkid = WPA_GET_LE16(rpos);
1349 /* PMKID-Count was included; use it */
1350 if (num_pmkid != 0) {
1351 u8 *after;
1352
1353 if (num_pmkid * PMKID_LEN > rend - rpos - 2)
1354 return -1;
1355 /*
1356 * PMKID may have been included in RSN IE in
1357 * (Re)Association Request frame, so remove the old
1358 * PMKID(s) first before adding the new one.
1359 */
1360 wpa_printf(MSG_DEBUG,
1361 "FT: Remove %u old PMKID(s) from RSN IE",
1362 num_pmkid);
1363 after = rpos + 2 + num_pmkid * PMKID_LEN;
1364 os_memmove(rpos + 2, after, rend - after);
1365 start[1] -= num_pmkid * PMKID_LEN;
1366 added -= num_pmkid * PMKID_LEN;
1367 }
1368 WPA_PUT_LE16(rpos, 1);
1369 rpos += 2;
1370 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos);
1371 os_memcpy(rpos, pmkid, PMKID_LEN);
1372 added += PMKID_LEN;
1373 start[1] += PMKID_LEN;
1374 }
1375
1376 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1377 "(PMKID inserted)", start, 2 + start[1]);
1378
1379 *ies_len += added;
1380
1381 return 0;
1382 }
1383 #endif /* CONFIG_IEEE80211R */
1384
1385
wpa_cipher_key_len(int cipher)1386 int wpa_cipher_key_len(int cipher)
1387 {
1388 switch (cipher) {
1389 case WPA_CIPHER_CCMP_256:
1390 case WPA_CIPHER_GCMP_256:
1391 case WPA_CIPHER_BIP_GMAC_256:
1392 case WPA_CIPHER_BIP_CMAC_256:
1393 return 32;
1394 case WPA_CIPHER_CCMP:
1395 case WPA_CIPHER_GCMP:
1396 case WPA_CIPHER_AES_128_CMAC:
1397 case WPA_CIPHER_BIP_GMAC_128:
1398 return 16;
1399 case WPA_CIPHER_TKIP:
1400 return 32;
1401 }
1402
1403 return 0;
1404 }
1405
1406
wpa_cipher_rsc_len(int cipher)1407 int wpa_cipher_rsc_len(int cipher)
1408 {
1409 switch (cipher) {
1410 case WPA_CIPHER_CCMP_256:
1411 case WPA_CIPHER_GCMP_256:
1412 case WPA_CIPHER_CCMP:
1413 case WPA_CIPHER_GCMP:
1414 case WPA_CIPHER_TKIP:
1415 return 6;
1416 }
1417
1418 return 0;
1419 }
1420
1421
wpa_cipher_to_alg(int cipher)1422 int wpa_cipher_to_alg(int cipher)
1423 {
1424 switch (cipher) {
1425 case WPA_CIPHER_CCMP_256:
1426 return WPA_ALG_CCMP_256;
1427 case WPA_CIPHER_GCMP_256:
1428 return WPA_ALG_GCMP_256;
1429 case WPA_CIPHER_CCMP:
1430 return WPA_ALG_CCMP;
1431 case WPA_CIPHER_GCMP:
1432 return WPA_ALG_GCMP;
1433 case WPA_CIPHER_TKIP:
1434 return WPA_ALG_TKIP;
1435 case WPA_CIPHER_AES_128_CMAC:
1436 return WPA_ALG_IGTK;
1437 case WPA_CIPHER_BIP_GMAC_128:
1438 return WPA_ALG_BIP_GMAC_128;
1439 case WPA_CIPHER_BIP_GMAC_256:
1440 return WPA_ALG_BIP_GMAC_256;
1441 case WPA_CIPHER_BIP_CMAC_256:
1442 return WPA_ALG_BIP_CMAC_256;
1443 }
1444 return WPA_ALG_NONE;
1445 }
1446
1447
wpa_cipher_valid_pairwise(int cipher)1448 int wpa_cipher_valid_pairwise(int cipher)
1449 {
1450 return cipher == WPA_CIPHER_CCMP_256 ||
1451 cipher == WPA_CIPHER_GCMP_256 ||
1452 cipher == WPA_CIPHER_CCMP ||
1453 cipher == WPA_CIPHER_GCMP ||
1454 cipher == WPA_CIPHER_TKIP;
1455 }
1456
1457
wpa_cipher_to_suite(int proto,int cipher)1458 u32 wpa_cipher_to_suite(int proto, int cipher)
1459 {
1460 if (cipher & WPA_CIPHER_CCMP_256)
1461 return RSN_CIPHER_SUITE_CCMP_256;
1462 if (cipher & WPA_CIPHER_GCMP_256)
1463 return RSN_CIPHER_SUITE_GCMP_256;
1464 if (cipher & WPA_CIPHER_CCMP)
1465 return (proto == WPA_PROTO_RSN ?
1466 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1467 if (cipher & WPA_CIPHER_GCMP)
1468 return RSN_CIPHER_SUITE_GCMP;
1469 if (cipher & WPA_CIPHER_TKIP)
1470 return (proto == WPA_PROTO_RSN ?
1471 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1472 if (cipher & WPA_CIPHER_NONE)
1473 return (proto == WPA_PROTO_RSN ?
1474 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1475 if (cipher & WPA_CIPHER_GTK_NOT_USED)
1476 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
1477 if (cipher & WPA_CIPHER_AES_128_CMAC)
1478 return RSN_CIPHER_SUITE_AES_128_CMAC;
1479 if (cipher & WPA_CIPHER_BIP_GMAC_128)
1480 return RSN_CIPHER_SUITE_BIP_GMAC_128;
1481 if (cipher & WPA_CIPHER_BIP_GMAC_256)
1482 return RSN_CIPHER_SUITE_BIP_GMAC_256;
1483 if (cipher & WPA_CIPHER_BIP_CMAC_256)
1484 return RSN_CIPHER_SUITE_BIP_CMAC_256;
1485 return 0;
1486 }
1487
1488
rsn_cipher_put_suites(u8 * start,int ciphers)1489 int rsn_cipher_put_suites(u8 *start, int ciphers)
1490 {
1491 u8 *pos = start;
1492
1493 if (ciphers & WPA_CIPHER_CCMP_256) {
1494 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
1495 pos += RSN_SELECTOR_LEN;
1496 }
1497 if (ciphers & WPA_CIPHER_GCMP_256) {
1498 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
1499 pos += RSN_SELECTOR_LEN;
1500 }
1501 if (ciphers & WPA_CIPHER_CCMP) {
1502 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1503 pos += RSN_SELECTOR_LEN;
1504 }
1505 if (ciphers & WPA_CIPHER_GCMP) {
1506 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1507 pos += RSN_SELECTOR_LEN;
1508 }
1509 if (ciphers & WPA_CIPHER_TKIP) {
1510 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1511 pos += RSN_SELECTOR_LEN;
1512 }
1513 if (ciphers & WPA_CIPHER_NONE) {
1514 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1515 pos += RSN_SELECTOR_LEN;
1516 }
1517
1518 return (pos - start) / RSN_SELECTOR_LEN;
1519 }
1520
1521
wpa_cipher_put_suites(u8 * start,int ciphers)1522 int wpa_cipher_put_suites(u8 *start, int ciphers)
1523 {
1524 u8 *pos = start;
1525
1526 if (ciphers & WPA_CIPHER_CCMP) {
1527 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1528 pos += WPA_SELECTOR_LEN;
1529 }
1530 if (ciphers & WPA_CIPHER_TKIP) {
1531 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1532 pos += WPA_SELECTOR_LEN;
1533 }
1534 if (ciphers & WPA_CIPHER_NONE) {
1535 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1536 pos += WPA_SELECTOR_LEN;
1537 }
1538
1539 return (pos - start) / RSN_SELECTOR_LEN;
1540 }
1541
1542
wpa_pick_pairwise_cipher(int ciphers,int none_allowed)1543 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1544 {
1545 if (ciphers & WPA_CIPHER_CCMP_256)
1546 return WPA_CIPHER_CCMP_256;
1547 if (ciphers & WPA_CIPHER_GCMP_256)
1548 return WPA_CIPHER_GCMP_256;
1549 if (ciphers & WPA_CIPHER_CCMP)
1550 return WPA_CIPHER_CCMP;
1551 if (ciphers & WPA_CIPHER_GCMP)
1552 return WPA_CIPHER_GCMP;
1553 if (ciphers & WPA_CIPHER_TKIP)
1554 return WPA_CIPHER_TKIP;
1555 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1556 return WPA_CIPHER_NONE;
1557 return -1;
1558 }
1559
1560
wpa_pick_group_cipher(int ciphers)1561 int wpa_pick_group_cipher(int ciphers)
1562 {
1563 if (ciphers & WPA_CIPHER_CCMP_256)
1564 return WPA_CIPHER_CCMP_256;
1565 if (ciphers & WPA_CIPHER_GCMP_256)
1566 return WPA_CIPHER_GCMP_256;
1567 if (ciphers & WPA_CIPHER_CCMP)
1568 return WPA_CIPHER_CCMP;
1569 if (ciphers & WPA_CIPHER_GCMP)
1570 return WPA_CIPHER_GCMP;
1571 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
1572 return WPA_CIPHER_GTK_NOT_USED;
1573 if (ciphers & WPA_CIPHER_TKIP)
1574 return WPA_CIPHER_TKIP;
1575 return -1;
1576 }
1577
1578
wpa_parse_cipher(const char * value)1579 int wpa_parse_cipher(const char *value)
1580 {
1581 int val = 0, last;
1582 char *start, *end, *buf;
1583
1584 buf = os_strdup(value);
1585 if (buf == NULL)
1586 return -1;
1587 start = buf;
1588
1589 while (*start != '\0') {
1590 while (*start == ' ' || *start == '\t')
1591 start++;
1592 if (*start == '\0')
1593 break;
1594 end = start;
1595 while (*end != ' ' && *end != '\t' && *end != '\0')
1596 end++;
1597 last = *end == '\0';
1598 *end = '\0';
1599 if (os_strcmp(start, "CCMP-256") == 0)
1600 val |= WPA_CIPHER_CCMP_256;
1601 else if (os_strcmp(start, "GCMP-256") == 0)
1602 val |= WPA_CIPHER_GCMP_256;
1603 else if (os_strcmp(start, "CCMP") == 0)
1604 val |= WPA_CIPHER_CCMP;
1605 else if (os_strcmp(start, "GCMP") == 0)
1606 val |= WPA_CIPHER_GCMP;
1607 else if (os_strcmp(start, "TKIP") == 0)
1608 val |= WPA_CIPHER_TKIP;
1609 else if (os_strcmp(start, "WEP104") == 0)
1610 val |= WPA_CIPHER_WEP104;
1611 else if (os_strcmp(start, "WEP40") == 0)
1612 val |= WPA_CIPHER_WEP40;
1613 else if (os_strcmp(start, "NONE") == 0)
1614 val |= WPA_CIPHER_NONE;
1615 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
1616 val |= WPA_CIPHER_GTK_NOT_USED;
1617 else {
1618 os_free(buf);
1619 return -1;
1620 }
1621
1622 if (last)
1623 break;
1624 start = end + 1;
1625 }
1626 os_free(buf);
1627
1628 return val;
1629 }
1630
1631
wpa_write_ciphers(char * start,char * end,int ciphers,const char * delim)1632 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
1633 {
1634 char *pos = start;
1635 int ret;
1636
1637 if (ciphers & WPA_CIPHER_CCMP_256) {
1638 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
1639 pos == start ? "" : delim);
1640 if (os_snprintf_error(end - pos, ret))
1641 return -1;
1642 pos += ret;
1643 }
1644 if (ciphers & WPA_CIPHER_GCMP_256) {
1645 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
1646 pos == start ? "" : delim);
1647 if (os_snprintf_error(end - pos, ret))
1648 return -1;
1649 pos += ret;
1650 }
1651 if (ciphers & WPA_CIPHER_CCMP) {
1652 ret = os_snprintf(pos, end - pos, "%sCCMP",
1653 pos == start ? "" : delim);
1654 if (os_snprintf_error(end - pos, ret))
1655 return -1;
1656 pos += ret;
1657 }
1658 if (ciphers & WPA_CIPHER_GCMP) {
1659 ret = os_snprintf(pos, end - pos, "%sGCMP",
1660 pos == start ? "" : delim);
1661 if (os_snprintf_error(end - pos, ret))
1662 return -1;
1663 pos += ret;
1664 }
1665 if (ciphers & WPA_CIPHER_TKIP) {
1666 ret = os_snprintf(pos, end - pos, "%sTKIP",
1667 pos == start ? "" : delim);
1668 if (os_snprintf_error(end - pos, ret))
1669 return -1;
1670 pos += ret;
1671 }
1672 if (ciphers & WPA_CIPHER_NONE) {
1673 ret = os_snprintf(pos, end - pos, "%sNONE",
1674 pos == start ? "" : delim);
1675 if (os_snprintf_error(end - pos, ret))
1676 return -1;
1677 pos += ret;
1678 }
1679
1680 return pos - start;
1681 }
1682
1683
wpa_select_ap_group_cipher(int wpa,int wpa_pairwise,int rsn_pairwise)1684 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
1685 {
1686 int pairwise = 0;
1687
1688 /* Select group cipher based on the enabled pairwise cipher suites */
1689 if (wpa & 1)
1690 pairwise |= wpa_pairwise;
1691 if (wpa & 2)
1692 pairwise |= rsn_pairwise;
1693
1694 if (pairwise & WPA_CIPHER_TKIP)
1695 return WPA_CIPHER_TKIP;
1696 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
1697 return WPA_CIPHER_GCMP;
1698 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
1699 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
1700 return WPA_CIPHER_GCMP_256;
1701 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
1702 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
1703 return WPA_CIPHER_CCMP_256;
1704 return WPA_CIPHER_CCMP;
1705 }
1706