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Allow management group cipher to be configured
[thirdparty/hostap.git] / src / common / wpa_common.c
1 /*
2 * WPA/RSN - Shared functions for supplicant and authenticator
3 * Copyright (c) 2002-2013, 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/aes_wrap.h"
16 #include "crypto/crypto.h"
17 #include "ieee802_11_defs.h"
18 #include "defs.h"
19 #include "wpa_common.h"
20
21
22 /**
23 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
24 * @key: EAPOL-Key Key Confirmation Key (KCK)
25 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
26 * @buf: Pointer to the beginning of the EAPOL header (version field)
27 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
28 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
29 * Returns: 0 on success, -1 on failure
30 *
31 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
32 * to be cleared (all zeroes) when calling this function.
33 *
34 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
35 * description of the Key MIC calculation. It includes packet data from the
36 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
37 * happened during final editing of the standard and the correct behavior is
38 * defined in the last draft (IEEE 802.11i/D10).
39 */
40 int wpa_eapol_key_mic(const u8 *key, int ver, const u8 *buf, size_t len,
41 u8 *mic)
42 {
43 u8 hash[SHA1_MAC_LEN];
44
45 switch (ver) {
46 #ifndef CONFIG_FIPS
47 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
48 return hmac_md5(key, 16, buf, len, mic);
49 #endif /* CONFIG_FIPS */
50 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
51 if (hmac_sha1(key, 16, buf, len, hash))
52 return -1;
53 os_memcpy(mic, hash, MD5_MAC_LEN);
54 break;
55 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
56 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
57 return omac1_aes_128(key, buf, len, mic);
58 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
59 #ifdef CONFIG_HS20
60 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
61 /* FIX: This should be based on negotiated AKM */
62 return omac1_aes_128(key, buf, len, mic);
63 #endif /* CONFIG_HS20 */
64 default:
65 return -1;
66 }
67
68 return 0;
69 }
70
71
72 /**
73 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
74 * @pmk: Pairwise master key
75 * @pmk_len: Length of PMK
76 * @label: Label to use in derivation
77 * @addr1: AA or SA
78 * @addr2: SA or AA
79 * @nonce1: ANonce or SNonce
80 * @nonce2: SNonce or ANonce
81 * @ptk: Buffer for pairwise transient key
82 * @ptk_len: Length of PTK
83 * @use_sha256: Whether to use SHA256-based KDF
84 *
85 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
86 * PTK = PRF-X(PMK, "Pairwise key expansion",
87 * Min(AA, SA) || Max(AA, SA) ||
88 * Min(ANonce, SNonce) || Max(ANonce, SNonce))
89 *
90 * STK = PRF-X(SMK, "Peer key expansion",
91 * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
92 * Min(INonce, PNonce) || Max(INonce, PNonce))
93 */
94 void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
95 const u8 *addr1, const u8 *addr2,
96 const u8 *nonce1, const u8 *nonce2,
97 u8 *ptk, size_t ptk_len, int use_sha256)
98 {
99 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
100
101 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
102 os_memcpy(data, addr1, ETH_ALEN);
103 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
104 } else {
105 os_memcpy(data, addr2, ETH_ALEN);
106 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
107 }
108
109 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
110 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
111 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
112 WPA_NONCE_LEN);
113 } else {
114 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
115 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
116 WPA_NONCE_LEN);
117 }
118
119 #ifdef CONFIG_IEEE80211W
120 if (use_sha256)
121 sha256_prf(pmk, pmk_len, label, data, sizeof(data),
122 ptk, ptk_len);
123 else
124 #endif /* CONFIG_IEEE80211W */
125 sha1_prf(pmk, pmk_len, label, data, sizeof(data), ptk,
126 ptk_len);
127
128 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
129 MAC2STR(addr1), MAC2STR(addr2));
130 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
131 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
132 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
133 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", ptk, ptk_len);
134 }
135
136
137 #ifdef CONFIG_IEEE80211R
138 int wpa_ft_mic(const u8 *kck, const u8 *sta_addr, const u8 *ap_addr,
139 u8 transaction_seqnum, const u8 *mdie, size_t mdie_len,
140 const u8 *ftie, size_t ftie_len,
141 const u8 *rsnie, size_t rsnie_len,
142 const u8 *ric, size_t ric_len, u8 *mic)
143 {
144 u8 *buf, *pos;
145 size_t buf_len;
146
147 buf_len = 2 * ETH_ALEN + 1 + mdie_len + ftie_len + rsnie_len + ric_len;
148 buf = os_malloc(buf_len);
149 if (buf == NULL)
150 return -1;
151
152 pos = buf;
153 os_memcpy(pos, sta_addr, ETH_ALEN);
154 pos += ETH_ALEN;
155 os_memcpy(pos, ap_addr, ETH_ALEN);
156 pos += ETH_ALEN;
157 *pos++ = transaction_seqnum;
158 if (rsnie) {
159 os_memcpy(pos, rsnie, rsnie_len);
160 pos += rsnie_len;
161 }
162 if (mdie) {
163 os_memcpy(pos, mdie, mdie_len);
164 pos += mdie_len;
165 }
166 if (ftie) {
167 struct rsn_ftie *_ftie;
168 os_memcpy(pos, ftie, ftie_len);
169 if (ftie_len < 2 + sizeof(*_ftie)) {
170 os_free(buf);
171 return -1;
172 }
173 _ftie = (struct rsn_ftie *) (pos + 2);
174 os_memset(_ftie->mic, 0, sizeof(_ftie->mic));
175 pos += ftie_len;
176 }
177 if (ric) {
178 os_memcpy(pos, ric, ric_len);
179 pos += ric_len;
180 }
181
182 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", buf, pos - buf);
183 if (omac1_aes_128(kck, buf, pos - buf, mic)) {
184 os_free(buf);
185 return -1;
186 }
187
188 os_free(buf);
189
190 return 0;
191 }
192
193
194 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
195 struct wpa_ft_ies *parse)
196 {
197 const u8 *end, *pos;
198
199 parse->ftie = ie;
200 parse->ftie_len = ie_len;
201
202 pos = ie + sizeof(struct rsn_ftie);
203 end = ie + ie_len;
204
205 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
206 switch (pos[0]) {
207 case FTIE_SUBELEM_R1KH_ID:
208 if (pos[1] != FT_R1KH_ID_LEN) {
209 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
210 "length in FTIE: %d", pos[1]);
211 return -1;
212 }
213 parse->r1kh_id = pos + 2;
214 break;
215 case FTIE_SUBELEM_GTK:
216 parse->gtk = pos + 2;
217 parse->gtk_len = pos[1];
218 break;
219 case FTIE_SUBELEM_R0KH_ID:
220 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
221 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
222 "length in FTIE: %d", pos[1]);
223 return -1;
224 }
225 parse->r0kh_id = pos + 2;
226 parse->r0kh_id_len = pos[1];
227 break;
228 #ifdef CONFIG_IEEE80211W
229 case FTIE_SUBELEM_IGTK:
230 parse->igtk = pos + 2;
231 parse->igtk_len = pos[1];
232 break;
233 #endif /* CONFIG_IEEE80211W */
234 }
235
236 pos += 2 + pos[1];
237 }
238
239 return 0;
240 }
241
242
243 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
244 struct wpa_ft_ies *parse)
245 {
246 const u8 *end, *pos;
247 struct wpa_ie_data data;
248 int ret;
249 const struct rsn_ftie *ftie;
250 int prot_ie_count = 0;
251
252 os_memset(parse, 0, sizeof(*parse));
253 if (ies == NULL)
254 return 0;
255
256 pos = ies;
257 end = ies + ies_len;
258 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
259 switch (pos[0]) {
260 case WLAN_EID_RSN:
261 parse->rsn = pos + 2;
262 parse->rsn_len = pos[1];
263 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
264 parse->rsn_len + 2,
265 &data);
266 if (ret < 0) {
267 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
268 "RSN IE: %d", ret);
269 return -1;
270 }
271 if (data.num_pmkid == 1 && data.pmkid)
272 parse->rsn_pmkid = data.pmkid;
273 break;
274 case WLAN_EID_MOBILITY_DOMAIN:
275 parse->mdie = pos + 2;
276 parse->mdie_len = pos[1];
277 break;
278 case WLAN_EID_FAST_BSS_TRANSITION:
279 if (pos[1] < sizeof(*ftie))
280 return -1;
281 ftie = (const struct rsn_ftie *) (pos + 2);
282 prot_ie_count = ftie->mic_control[1];
283 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
284 return -1;
285 break;
286 case WLAN_EID_TIMEOUT_INTERVAL:
287 parse->tie = pos + 2;
288 parse->tie_len = pos[1];
289 break;
290 case WLAN_EID_RIC_DATA:
291 if (parse->ric == NULL)
292 parse->ric = pos;
293 break;
294 }
295
296 pos += 2 + pos[1];
297 }
298
299 if (prot_ie_count == 0)
300 return 0; /* no MIC */
301
302 /*
303 * Check that the protected IE count matches with IEs included in the
304 * frame.
305 */
306 if (parse->rsn)
307 prot_ie_count--;
308 if (parse->mdie)
309 prot_ie_count--;
310 if (parse->ftie)
311 prot_ie_count--;
312 if (prot_ie_count < 0) {
313 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
314 "the protected IE count");
315 return -1;
316 }
317
318 if (prot_ie_count == 0 && parse->ric) {
319 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
320 "included in protected IE count");
321 return -1;
322 }
323
324 /* Determine the end of the RIC IE(s) */
325 pos = parse->ric;
326 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
327 prot_ie_count) {
328 prot_ie_count--;
329 pos += 2 + pos[1];
330 }
331 parse->ric_len = pos - parse->ric;
332 if (prot_ie_count) {
333 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
334 "frame", (int) prot_ie_count);
335 return -1;
336 }
337
338 return 0;
339 }
340 #endif /* CONFIG_IEEE80211R */
341
342
343 static int rsn_selector_to_bitfield(const u8 *s)
344 {
345 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
346 return WPA_CIPHER_NONE;
347 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP40)
348 return WPA_CIPHER_WEP40;
349 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
350 return WPA_CIPHER_TKIP;
351 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
352 return WPA_CIPHER_CCMP;
353 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104)
354 return WPA_CIPHER_WEP104;
355 #ifdef CONFIG_IEEE80211W
356 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
357 return WPA_CIPHER_AES_128_CMAC;
358 #endif /* CONFIG_IEEE80211W */
359 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
360 return WPA_CIPHER_GCMP;
361 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
362 return WPA_CIPHER_CCMP_256;
363 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
364 return WPA_CIPHER_GCMP_256;
365 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
366 return WPA_CIPHER_BIP_GMAC_128;
367 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
368 return WPA_CIPHER_BIP_GMAC_256;
369 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
370 return WPA_CIPHER_BIP_CMAC_256;
371 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
372 return WPA_CIPHER_GTK_NOT_USED;
373 return 0;
374 }
375
376
377 static int rsn_key_mgmt_to_bitfield(const u8 *s)
378 {
379 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
380 return WPA_KEY_MGMT_IEEE8021X;
381 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
382 return WPA_KEY_MGMT_PSK;
383 #ifdef CONFIG_IEEE80211R
384 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
385 return WPA_KEY_MGMT_FT_IEEE8021X;
386 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
387 return WPA_KEY_MGMT_FT_PSK;
388 #endif /* CONFIG_IEEE80211R */
389 #ifdef CONFIG_IEEE80211W
390 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
391 return WPA_KEY_MGMT_IEEE8021X_SHA256;
392 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
393 return WPA_KEY_MGMT_PSK_SHA256;
394 #endif /* CONFIG_IEEE80211W */
395 #ifdef CONFIG_SAE
396 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
397 return WPA_KEY_MGMT_SAE;
398 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
399 return WPA_KEY_MGMT_FT_SAE;
400 #endif /* CONFIG_SAE */
401 return 0;
402 }
403
404
405 static int wpa_cipher_valid_group(int cipher)
406 {
407 return wpa_cipher_valid_pairwise(cipher) ||
408 cipher == WPA_CIPHER_WEP104 ||
409 cipher == WPA_CIPHER_WEP40 ||
410 cipher == WPA_CIPHER_GTK_NOT_USED;
411 }
412
413
414 #ifdef CONFIG_IEEE80211W
415 int wpa_cipher_valid_mgmt_group(int cipher)
416 {
417 return cipher == WPA_CIPHER_AES_128_CMAC ||
418 cipher == WPA_CIPHER_BIP_GMAC_128 ||
419 cipher == WPA_CIPHER_BIP_GMAC_256 ||
420 cipher == WPA_CIPHER_BIP_CMAC_256;
421 }
422 #endif /* CONFIG_IEEE80211W */
423
424
425 /**
426 * wpa_parse_wpa_ie_rsn - Parse RSN IE
427 * @rsn_ie: Buffer containing RSN IE
428 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
429 * @data: Pointer to structure that will be filled in with parsed data
430 * Returns: 0 on success, <0 on failure
431 */
432 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
433 struct wpa_ie_data *data)
434 {
435 const struct rsn_ie_hdr *hdr;
436 const u8 *pos;
437 int left;
438 int i, count;
439
440 os_memset(data, 0, sizeof(*data));
441 data->proto = WPA_PROTO_RSN;
442 data->pairwise_cipher = WPA_CIPHER_CCMP;
443 data->group_cipher = WPA_CIPHER_CCMP;
444 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
445 data->capabilities = 0;
446 data->pmkid = NULL;
447 data->num_pmkid = 0;
448 #ifdef CONFIG_IEEE80211W
449 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
450 #else /* CONFIG_IEEE80211W */
451 data->mgmt_group_cipher = 0;
452 #endif /* CONFIG_IEEE80211W */
453
454 if (rsn_ie_len == 0) {
455 /* No RSN IE - fail silently */
456 return -1;
457 }
458
459 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
460 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
461 __func__, (unsigned long) rsn_ie_len);
462 return -1;
463 }
464
465 hdr = (const struct rsn_ie_hdr *) rsn_ie;
466
467 if (hdr->elem_id != WLAN_EID_RSN ||
468 hdr->len != rsn_ie_len - 2 ||
469 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
470 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
471 __func__);
472 return -2;
473 }
474
475 pos = (const u8 *) (hdr + 1);
476 left = rsn_ie_len - sizeof(*hdr);
477
478 if (left >= RSN_SELECTOR_LEN) {
479 data->group_cipher = rsn_selector_to_bitfield(pos);
480 if (!wpa_cipher_valid_group(data->group_cipher)) {
481 wpa_printf(MSG_DEBUG, "%s: invalid group cipher 0x%x",
482 __func__, data->group_cipher);
483 return -1;
484 }
485 pos += RSN_SELECTOR_LEN;
486 left -= RSN_SELECTOR_LEN;
487 } else if (left > 0) {
488 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
489 __func__, left);
490 return -3;
491 }
492
493 if (left >= 2) {
494 data->pairwise_cipher = 0;
495 count = WPA_GET_LE16(pos);
496 pos += 2;
497 left -= 2;
498 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
499 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
500 "count %u left %u", __func__, count, left);
501 return -4;
502 }
503 for (i = 0; i < count; i++) {
504 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
505 pos += RSN_SELECTOR_LEN;
506 left -= RSN_SELECTOR_LEN;
507 }
508 #ifdef CONFIG_IEEE80211W
509 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
510 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
511 "pairwise cipher", __func__);
512 return -1;
513 }
514 #endif /* CONFIG_IEEE80211W */
515 } else if (left == 1) {
516 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
517 __func__);
518 return -5;
519 }
520
521 if (left >= 2) {
522 data->key_mgmt = 0;
523 count = WPA_GET_LE16(pos);
524 pos += 2;
525 left -= 2;
526 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
527 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
528 "count %u left %u", __func__, count, left);
529 return -6;
530 }
531 for (i = 0; i < count; i++) {
532 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
533 pos += RSN_SELECTOR_LEN;
534 left -= RSN_SELECTOR_LEN;
535 }
536 } else if (left == 1) {
537 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
538 __func__);
539 return -7;
540 }
541
542 if (left >= 2) {
543 data->capabilities = WPA_GET_LE16(pos);
544 pos += 2;
545 left -= 2;
546 }
547
548 if (left >= 2) {
549 data->num_pmkid = WPA_GET_LE16(pos);
550 pos += 2;
551 left -= 2;
552 if (left < (int) data->num_pmkid * PMKID_LEN) {
553 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
554 "(num_pmkid=%lu left=%d)",
555 __func__, (unsigned long) data->num_pmkid,
556 left);
557 data->num_pmkid = 0;
558 return -9;
559 } else {
560 data->pmkid = pos;
561 pos += data->num_pmkid * PMKID_LEN;
562 left -= data->num_pmkid * PMKID_LEN;
563 }
564 }
565
566 #ifdef CONFIG_IEEE80211W
567 if (left >= 4) {
568 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
569 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
570 wpa_printf(MSG_DEBUG, "%s: Unsupported management "
571 "group cipher 0x%x", __func__,
572 data->mgmt_group_cipher);
573 return -10;
574 }
575 pos += RSN_SELECTOR_LEN;
576 left -= RSN_SELECTOR_LEN;
577 }
578 #endif /* CONFIG_IEEE80211W */
579
580 if (left > 0) {
581 wpa_hexdump(MSG_DEBUG,
582 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
583 pos, left);
584 }
585
586 return 0;
587 }
588
589
590 static int wpa_selector_to_bitfield(const u8 *s)
591 {
592 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
593 return WPA_CIPHER_NONE;
594 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
595 return WPA_CIPHER_WEP40;
596 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
597 return WPA_CIPHER_TKIP;
598 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
599 return WPA_CIPHER_CCMP;
600 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
601 return WPA_CIPHER_WEP104;
602 return 0;
603 }
604
605
606 static int wpa_key_mgmt_to_bitfield(const u8 *s)
607 {
608 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
609 return WPA_KEY_MGMT_IEEE8021X;
610 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
611 return WPA_KEY_MGMT_PSK;
612 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
613 return WPA_KEY_MGMT_WPA_NONE;
614 return 0;
615 }
616
617
618 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
619 struct wpa_ie_data *data)
620 {
621 const struct wpa_ie_hdr *hdr;
622 const u8 *pos;
623 int left;
624 int i, count;
625
626 os_memset(data, 0, sizeof(*data));
627 data->proto = WPA_PROTO_WPA;
628 data->pairwise_cipher = WPA_CIPHER_TKIP;
629 data->group_cipher = WPA_CIPHER_TKIP;
630 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
631 data->capabilities = 0;
632 data->pmkid = NULL;
633 data->num_pmkid = 0;
634 data->mgmt_group_cipher = 0;
635
636 if (wpa_ie_len == 0) {
637 /* No WPA IE - fail silently */
638 return -1;
639 }
640
641 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
642 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
643 __func__, (unsigned long) wpa_ie_len);
644 return -1;
645 }
646
647 hdr = (const struct wpa_ie_hdr *) wpa_ie;
648
649 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
650 hdr->len != wpa_ie_len - 2 ||
651 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
652 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
653 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
654 __func__);
655 return -2;
656 }
657
658 pos = (const u8 *) (hdr + 1);
659 left = wpa_ie_len - sizeof(*hdr);
660
661 if (left >= WPA_SELECTOR_LEN) {
662 data->group_cipher = wpa_selector_to_bitfield(pos);
663 pos += WPA_SELECTOR_LEN;
664 left -= WPA_SELECTOR_LEN;
665 } else if (left > 0) {
666 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
667 __func__, left);
668 return -3;
669 }
670
671 if (left >= 2) {
672 data->pairwise_cipher = 0;
673 count = WPA_GET_LE16(pos);
674 pos += 2;
675 left -= 2;
676 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
677 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
678 "count %u left %u", __func__, count, left);
679 return -4;
680 }
681 for (i = 0; i < count; i++) {
682 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
683 pos += WPA_SELECTOR_LEN;
684 left -= WPA_SELECTOR_LEN;
685 }
686 } else if (left == 1) {
687 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
688 __func__);
689 return -5;
690 }
691
692 if (left >= 2) {
693 data->key_mgmt = 0;
694 count = WPA_GET_LE16(pos);
695 pos += 2;
696 left -= 2;
697 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
698 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
699 "count %u left %u", __func__, count, left);
700 return -6;
701 }
702 for (i = 0; i < count; i++) {
703 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
704 pos += WPA_SELECTOR_LEN;
705 left -= WPA_SELECTOR_LEN;
706 }
707 } else if (left == 1) {
708 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
709 __func__);
710 return -7;
711 }
712
713 if (left >= 2) {
714 data->capabilities = WPA_GET_LE16(pos);
715 pos += 2;
716 left -= 2;
717 }
718
719 if (left > 0) {
720 wpa_hexdump(MSG_DEBUG,
721 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
722 pos, left);
723 }
724
725 return 0;
726 }
727
728
729 #ifdef CONFIG_IEEE80211R
730
731 /**
732 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
733 *
734 * IEEE Std 802.11r-2008 - 8.5.1.5.3
735 */
736 void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
737 const u8 *ssid, size_t ssid_len,
738 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
739 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
740 {
741 u8 buf[1 + WPA_MAX_SSID_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
742 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
743 u8 *pos, r0_key_data[48], hash[32];
744 const u8 *addr[2];
745 size_t len[2];
746
747 /*
748 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
749 * SSIDlength || SSID || MDID || R0KHlength ||
750 * R0KH-ID || S0KH-ID)
751 * XXKey is either the second 256 bits of MSK or PSK.
752 * PMK-R0 = L(R0-Key-Data, 0, 256)
753 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
754 */
755 if (ssid_len > WPA_MAX_SSID_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
756 return;
757 pos = buf;
758 *pos++ = ssid_len;
759 os_memcpy(pos, ssid, ssid_len);
760 pos += ssid_len;
761 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
762 pos += MOBILITY_DOMAIN_ID_LEN;
763 *pos++ = r0kh_id_len;
764 os_memcpy(pos, r0kh_id, r0kh_id_len);
765 pos += r0kh_id_len;
766 os_memcpy(pos, s0kh_id, ETH_ALEN);
767 pos += ETH_ALEN;
768
769 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
770 r0_key_data, sizeof(r0_key_data));
771 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
772
773 /*
774 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
775 */
776 addr[0] = (const u8 *) "FT-R0N";
777 len[0] = 6;
778 addr[1] = r0_key_data + PMK_LEN;
779 len[1] = 16;
780
781 sha256_vector(2, addr, len, hash);
782 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
783 }
784
785
786 /**
787 * wpa_derive_pmk_r1_name - Derive PMKR1Name
788 *
789 * IEEE Std 802.11r-2008 - 8.5.1.5.4
790 */
791 void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
792 const u8 *s1kh_id, u8 *pmk_r1_name)
793 {
794 u8 hash[32];
795 const u8 *addr[4];
796 size_t len[4];
797
798 /*
799 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
800 * R1KH-ID || S1KH-ID))
801 */
802 addr[0] = (const u8 *) "FT-R1N";
803 len[0] = 6;
804 addr[1] = pmk_r0_name;
805 len[1] = WPA_PMK_NAME_LEN;
806 addr[2] = r1kh_id;
807 len[2] = FT_R1KH_ID_LEN;
808 addr[3] = s1kh_id;
809 len[3] = ETH_ALEN;
810
811 sha256_vector(4, addr, len, hash);
812 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
813 }
814
815
816 /**
817 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
818 *
819 * IEEE Std 802.11r-2008 - 8.5.1.5.4
820 */
821 void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
822 const u8 *r1kh_id, const u8 *s1kh_id,
823 u8 *pmk_r1, u8 *pmk_r1_name)
824 {
825 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
826 u8 *pos;
827
828 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
829 pos = buf;
830 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
831 pos += FT_R1KH_ID_LEN;
832 os_memcpy(pos, s1kh_id, ETH_ALEN);
833 pos += ETH_ALEN;
834
835 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
836
837 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
838 }
839
840
841 /**
842 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
843 *
844 * IEEE Std 802.11r-2008 - 8.5.1.5.5
845 */
846 void wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
847 const u8 *sta_addr, const u8 *bssid,
848 const u8 *pmk_r1_name,
849 u8 *ptk, size_t ptk_len, u8 *ptk_name)
850 {
851 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
852 u8 *pos, hash[32];
853 const u8 *addr[6];
854 size_t len[6];
855
856 /*
857 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
858 * BSSID || STA-ADDR)
859 */
860 pos = buf;
861 os_memcpy(pos, snonce, WPA_NONCE_LEN);
862 pos += WPA_NONCE_LEN;
863 os_memcpy(pos, anonce, WPA_NONCE_LEN);
864 pos += WPA_NONCE_LEN;
865 os_memcpy(pos, bssid, ETH_ALEN);
866 pos += ETH_ALEN;
867 os_memcpy(pos, sta_addr, ETH_ALEN);
868 pos += ETH_ALEN;
869
870 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, ptk, ptk_len);
871
872 /*
873 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
874 * ANonce || BSSID || STA-ADDR))
875 */
876 addr[0] = pmk_r1_name;
877 len[0] = WPA_PMK_NAME_LEN;
878 addr[1] = (const u8 *) "FT-PTKN";
879 len[1] = 7;
880 addr[2] = snonce;
881 len[2] = WPA_NONCE_LEN;
882 addr[3] = anonce;
883 len[3] = WPA_NONCE_LEN;
884 addr[4] = bssid;
885 len[4] = ETH_ALEN;
886 addr[5] = sta_addr;
887 len[5] = ETH_ALEN;
888
889 sha256_vector(6, addr, len, hash);
890 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
891 }
892
893 #endif /* CONFIG_IEEE80211R */
894
895
896 /**
897 * rsn_pmkid - Calculate PMK identifier
898 * @pmk: Pairwise master key
899 * @pmk_len: Length of pmk in bytes
900 * @aa: Authenticator address
901 * @spa: Supplicant address
902 * @pmkid: Buffer for PMKID
903 * @use_sha256: Whether to use SHA256-based KDF
904 *
905 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
906 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
907 */
908 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
909 u8 *pmkid, int use_sha256)
910 {
911 char *title = "PMK Name";
912 const u8 *addr[3];
913 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
914 unsigned char hash[SHA256_MAC_LEN];
915
916 addr[0] = (u8 *) title;
917 addr[1] = aa;
918 addr[2] = spa;
919
920 #ifdef CONFIG_IEEE80211W
921 if (use_sha256)
922 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
923 else
924 #endif /* CONFIG_IEEE80211W */
925 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
926 os_memcpy(pmkid, hash, PMKID_LEN);
927 }
928
929
930 /**
931 * wpa_cipher_txt - Convert cipher suite to a text string
932 * @cipher: Cipher suite (WPA_CIPHER_* enum)
933 * Returns: Pointer to a text string of the cipher suite name
934 */
935 const char * wpa_cipher_txt(int cipher)
936 {
937 switch (cipher) {
938 case WPA_CIPHER_NONE:
939 return "NONE";
940 case WPA_CIPHER_WEP40:
941 return "WEP-40";
942 case WPA_CIPHER_WEP104:
943 return "WEP-104";
944 case WPA_CIPHER_TKIP:
945 return "TKIP";
946 case WPA_CIPHER_CCMP:
947 return "CCMP";
948 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
949 return "CCMP+TKIP";
950 case WPA_CIPHER_GCMP:
951 return "GCMP";
952 case WPA_CIPHER_GCMP_256:
953 return "GCMP-256";
954 case WPA_CIPHER_CCMP_256:
955 return "CCMP-256";
956 case WPA_CIPHER_GTK_NOT_USED:
957 return "GTK_NOT_USED";
958 default:
959 return "UNKNOWN";
960 }
961 }
962
963
964 /**
965 * wpa_key_mgmt_txt - Convert key management suite to a text string
966 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
967 * @proto: WPA/WPA2 version (WPA_PROTO_*)
968 * Returns: Pointer to a text string of the key management suite name
969 */
970 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
971 {
972 switch (key_mgmt) {
973 case WPA_KEY_MGMT_IEEE8021X:
974 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
975 return "WPA2+WPA/IEEE 802.1X/EAP";
976 return proto == WPA_PROTO_RSN ?
977 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
978 case WPA_KEY_MGMT_PSK:
979 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
980 return "WPA2-PSK+WPA-PSK";
981 return proto == WPA_PROTO_RSN ?
982 "WPA2-PSK" : "WPA-PSK";
983 case WPA_KEY_MGMT_NONE:
984 return "NONE";
985 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
986 return "IEEE 802.1X (no WPA)";
987 #ifdef CONFIG_IEEE80211R
988 case WPA_KEY_MGMT_FT_IEEE8021X:
989 return "FT-EAP";
990 case WPA_KEY_MGMT_FT_PSK:
991 return "FT-PSK";
992 #endif /* CONFIG_IEEE80211R */
993 #ifdef CONFIG_IEEE80211W
994 case WPA_KEY_MGMT_IEEE8021X_SHA256:
995 return "WPA2-EAP-SHA256";
996 case WPA_KEY_MGMT_PSK_SHA256:
997 return "WPA2-PSK-SHA256";
998 #endif /* CONFIG_IEEE80211W */
999 default:
1000 return "UNKNOWN";
1001 }
1002 }
1003
1004
1005 int wpa_compare_rsn_ie(int ft_initial_assoc,
1006 const u8 *ie1, size_t ie1len,
1007 const u8 *ie2, size_t ie2len)
1008 {
1009 if (ie1 == NULL || ie2 == NULL)
1010 return -1;
1011
1012 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
1013 return 0; /* identical IEs */
1014
1015 #ifdef CONFIG_IEEE80211R
1016 if (ft_initial_assoc) {
1017 struct wpa_ie_data ie1d, ie2d;
1018 /*
1019 * The PMKID-List in RSN IE is different between Beacon/Probe
1020 * Response/(Re)Association Request frames and EAPOL-Key
1021 * messages in FT initial mobility domain association. Allow
1022 * for this, but verify that other parts of the RSN IEs are
1023 * identical.
1024 */
1025 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
1026 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
1027 return -1;
1028 if (ie1d.proto == ie2d.proto &&
1029 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
1030 ie1d.group_cipher == ie2d.group_cipher &&
1031 ie1d.key_mgmt == ie2d.key_mgmt &&
1032 ie1d.capabilities == ie2d.capabilities &&
1033 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
1034 return 0;
1035 }
1036 #endif /* CONFIG_IEEE80211R */
1037
1038 return -1;
1039 }
1040
1041
1042 #ifdef CONFIG_IEEE80211R
1043 int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
1044 {
1045 u8 *start, *end, *rpos, *rend;
1046 int added = 0;
1047
1048 start = ies;
1049 end = ies + ies_len;
1050
1051 while (start < end) {
1052 if (*start == WLAN_EID_RSN)
1053 break;
1054 start += 2 + start[1];
1055 }
1056 if (start >= end) {
1057 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1058 "IEs data");
1059 return -1;
1060 }
1061 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1062 start, 2 + start[1]);
1063
1064 /* Find start of PMKID-Count */
1065 rpos = start + 2;
1066 rend = rpos + start[1];
1067
1068 /* Skip Version and Group Data Cipher Suite */
1069 rpos += 2 + 4;
1070 /* Skip Pairwise Cipher Suite Count and List */
1071 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1072 /* Skip AKM Suite Count and List */
1073 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1074
1075 if (rpos == rend) {
1076 /* Add RSN Capabilities */
1077 os_memmove(rpos + 2, rpos, end - rpos);
1078 *rpos++ = 0;
1079 *rpos++ = 0;
1080 } else {
1081 /* Skip RSN Capabilities */
1082 rpos += 2;
1083 if (rpos > rend) {
1084 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1085 "IEs data");
1086 return -1;
1087 }
1088 }
1089
1090 if (rpos == rend) {
1091 /* No PMKID-Count field included; add it */
1092 os_memmove(rpos + 2 + PMKID_LEN, rpos, end - rpos);
1093 WPA_PUT_LE16(rpos, 1);
1094 rpos += 2;
1095 os_memcpy(rpos, pmkid, PMKID_LEN);
1096 added += 2 + PMKID_LEN;
1097 start[1] += 2 + PMKID_LEN;
1098 } else {
1099 /* PMKID-Count was included; use it */
1100 if (WPA_GET_LE16(rpos) != 0) {
1101 wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
1102 "in RSN IE in EAPOL-Key data");
1103 return -1;
1104 }
1105 WPA_PUT_LE16(rpos, 1);
1106 rpos += 2;
1107 os_memmove(rpos + PMKID_LEN, rpos, end - rpos);
1108 os_memcpy(rpos, pmkid, PMKID_LEN);
1109 added += PMKID_LEN;
1110 start[1] += PMKID_LEN;
1111 }
1112
1113 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1114 "(PMKID inserted)", start, 2 + start[1]);
1115
1116 return added;
1117 }
1118 #endif /* CONFIG_IEEE80211R */
1119
1120
1121 int wpa_cipher_key_len(int cipher)
1122 {
1123 switch (cipher) {
1124 case WPA_CIPHER_CCMP_256:
1125 case WPA_CIPHER_GCMP_256:
1126 case WPA_CIPHER_BIP_GMAC_256:
1127 case WPA_CIPHER_BIP_CMAC_256:
1128 return 32;
1129 case WPA_CIPHER_CCMP:
1130 case WPA_CIPHER_GCMP:
1131 case WPA_CIPHER_AES_128_CMAC:
1132 case WPA_CIPHER_BIP_GMAC_128:
1133 return 16;
1134 case WPA_CIPHER_TKIP:
1135 return 32;
1136 case WPA_CIPHER_WEP104:
1137 return 13;
1138 case WPA_CIPHER_WEP40:
1139 return 5;
1140 }
1141
1142 return 0;
1143 }
1144
1145
1146 int wpa_cipher_rsc_len(int cipher)
1147 {
1148 switch (cipher) {
1149 case WPA_CIPHER_CCMP_256:
1150 case WPA_CIPHER_GCMP_256:
1151 case WPA_CIPHER_CCMP:
1152 case WPA_CIPHER_GCMP:
1153 case WPA_CIPHER_TKIP:
1154 return 6;
1155 case WPA_CIPHER_WEP104:
1156 case WPA_CIPHER_WEP40:
1157 return 0;
1158 }
1159
1160 return 0;
1161 }
1162
1163
1164 int wpa_cipher_to_alg(int cipher)
1165 {
1166 switch (cipher) {
1167 case WPA_CIPHER_CCMP_256:
1168 return WPA_ALG_CCMP_256;
1169 case WPA_CIPHER_GCMP_256:
1170 return WPA_ALG_GCMP_256;
1171 case WPA_CIPHER_CCMP:
1172 return WPA_ALG_CCMP;
1173 case WPA_CIPHER_GCMP:
1174 return WPA_ALG_GCMP;
1175 case WPA_CIPHER_TKIP:
1176 return WPA_ALG_TKIP;
1177 case WPA_CIPHER_WEP104:
1178 case WPA_CIPHER_WEP40:
1179 return WPA_ALG_WEP;
1180 case WPA_CIPHER_AES_128_CMAC:
1181 return WPA_ALG_IGTK;
1182 case WPA_CIPHER_BIP_GMAC_128:
1183 return WPA_ALG_BIP_GMAC_128;
1184 case WPA_CIPHER_BIP_GMAC_256:
1185 return WPA_ALG_BIP_GMAC_256;
1186 case WPA_CIPHER_BIP_CMAC_256:
1187 return WPA_ALG_BIP_CMAC_256;
1188 }
1189 return WPA_ALG_NONE;
1190 }
1191
1192
1193 int wpa_cipher_valid_pairwise(int cipher)
1194 {
1195 return cipher == WPA_CIPHER_CCMP_256 ||
1196 cipher == WPA_CIPHER_GCMP_256 ||
1197 cipher == WPA_CIPHER_CCMP ||
1198 cipher == WPA_CIPHER_GCMP ||
1199 cipher == WPA_CIPHER_TKIP;
1200 }
1201
1202
1203 u32 wpa_cipher_to_suite(int proto, int cipher)
1204 {
1205 if (cipher & WPA_CIPHER_CCMP_256)
1206 return RSN_CIPHER_SUITE_CCMP_256;
1207 if (cipher & WPA_CIPHER_GCMP_256)
1208 return RSN_CIPHER_SUITE_GCMP_256;
1209 if (cipher & WPA_CIPHER_CCMP)
1210 return (proto == WPA_PROTO_RSN ?
1211 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1212 if (cipher & WPA_CIPHER_GCMP)
1213 return RSN_CIPHER_SUITE_GCMP;
1214 if (cipher & WPA_CIPHER_TKIP)
1215 return (proto == WPA_PROTO_RSN ?
1216 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1217 if (cipher & WPA_CIPHER_WEP104)
1218 return (proto == WPA_PROTO_RSN ?
1219 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1220 if (cipher & WPA_CIPHER_WEP40)
1221 return (proto == WPA_PROTO_RSN ?
1222 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1223 if (cipher & WPA_CIPHER_NONE)
1224 return (proto == WPA_PROTO_RSN ?
1225 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1226 if (cipher & WPA_CIPHER_GTK_NOT_USED)
1227 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
1228 if (cipher & WPA_CIPHER_AES_128_CMAC)
1229 return RSN_CIPHER_SUITE_AES_128_CMAC;
1230 if (cipher & WPA_CIPHER_BIP_GMAC_128)
1231 return RSN_CIPHER_SUITE_BIP_GMAC_128;
1232 if (cipher & WPA_CIPHER_BIP_GMAC_256)
1233 return RSN_CIPHER_SUITE_BIP_GMAC_256;
1234 if (cipher & WPA_CIPHER_BIP_CMAC_256)
1235 return RSN_CIPHER_SUITE_BIP_CMAC_256;
1236 return 0;
1237 }
1238
1239
1240 int rsn_cipher_put_suites(u8 *start, int ciphers)
1241 {
1242 u8 *pos = start;
1243
1244 if (ciphers & WPA_CIPHER_CCMP_256) {
1245 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
1246 pos += RSN_SELECTOR_LEN;
1247 }
1248 if (ciphers & WPA_CIPHER_GCMP_256) {
1249 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
1250 pos += RSN_SELECTOR_LEN;
1251 }
1252 if (ciphers & WPA_CIPHER_CCMP) {
1253 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1254 pos += RSN_SELECTOR_LEN;
1255 }
1256 if (ciphers & WPA_CIPHER_GCMP) {
1257 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1258 pos += RSN_SELECTOR_LEN;
1259 }
1260 if (ciphers & WPA_CIPHER_TKIP) {
1261 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1262 pos += RSN_SELECTOR_LEN;
1263 }
1264 if (ciphers & WPA_CIPHER_NONE) {
1265 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1266 pos += RSN_SELECTOR_LEN;
1267 }
1268
1269 return (pos - start) / RSN_SELECTOR_LEN;
1270 }
1271
1272
1273 int wpa_cipher_put_suites(u8 *start, int ciphers)
1274 {
1275 u8 *pos = start;
1276
1277 if (ciphers & WPA_CIPHER_CCMP) {
1278 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1279 pos += WPA_SELECTOR_LEN;
1280 }
1281 if (ciphers & WPA_CIPHER_TKIP) {
1282 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1283 pos += WPA_SELECTOR_LEN;
1284 }
1285 if (ciphers & WPA_CIPHER_NONE) {
1286 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1287 pos += WPA_SELECTOR_LEN;
1288 }
1289
1290 return (pos - start) / RSN_SELECTOR_LEN;
1291 }
1292
1293
1294 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1295 {
1296 if (ciphers & WPA_CIPHER_CCMP_256)
1297 return WPA_CIPHER_CCMP_256;
1298 if (ciphers & WPA_CIPHER_GCMP_256)
1299 return WPA_CIPHER_GCMP_256;
1300 if (ciphers & WPA_CIPHER_CCMP)
1301 return WPA_CIPHER_CCMP;
1302 if (ciphers & WPA_CIPHER_GCMP)
1303 return WPA_CIPHER_GCMP;
1304 if (ciphers & WPA_CIPHER_TKIP)
1305 return WPA_CIPHER_TKIP;
1306 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1307 return WPA_CIPHER_NONE;
1308 return -1;
1309 }
1310
1311
1312 int wpa_pick_group_cipher(int ciphers)
1313 {
1314 if (ciphers & WPA_CIPHER_CCMP_256)
1315 return WPA_CIPHER_CCMP_256;
1316 if (ciphers & WPA_CIPHER_GCMP_256)
1317 return WPA_CIPHER_GCMP_256;
1318 if (ciphers & WPA_CIPHER_CCMP)
1319 return WPA_CIPHER_CCMP;
1320 if (ciphers & WPA_CIPHER_GCMP)
1321 return WPA_CIPHER_GCMP;
1322 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
1323 return WPA_CIPHER_GTK_NOT_USED;
1324 if (ciphers & WPA_CIPHER_TKIP)
1325 return WPA_CIPHER_TKIP;
1326 if (ciphers & WPA_CIPHER_WEP104)
1327 return WPA_CIPHER_WEP104;
1328 if (ciphers & WPA_CIPHER_WEP40)
1329 return WPA_CIPHER_WEP40;
1330 return -1;
1331 }
1332
1333
1334 int wpa_parse_cipher(const char *value)
1335 {
1336 int val = 0, last;
1337 char *start, *end, *buf;
1338
1339 buf = os_strdup(value);
1340 if (buf == NULL)
1341 return -1;
1342 start = buf;
1343
1344 while (*start != '\0') {
1345 while (*start == ' ' || *start == '\t')
1346 start++;
1347 if (*start == '\0')
1348 break;
1349 end = start;
1350 while (*end != ' ' && *end != '\t' && *end != '\0')
1351 end++;
1352 last = *end == '\0';
1353 *end = '\0';
1354 if (os_strcmp(start, "CCMP-256") == 0)
1355 val |= WPA_CIPHER_CCMP_256;
1356 else if (os_strcmp(start, "GCMP-256") == 0)
1357 val |= WPA_CIPHER_GCMP_256;
1358 else if (os_strcmp(start, "CCMP") == 0)
1359 val |= WPA_CIPHER_CCMP;
1360 else if (os_strcmp(start, "GCMP") == 0)
1361 val |= WPA_CIPHER_GCMP;
1362 else if (os_strcmp(start, "TKIP") == 0)
1363 val |= WPA_CIPHER_TKIP;
1364 else if (os_strcmp(start, "WEP104") == 0)
1365 val |= WPA_CIPHER_WEP104;
1366 else if (os_strcmp(start, "WEP40") == 0)
1367 val |= WPA_CIPHER_WEP40;
1368 else if (os_strcmp(start, "NONE") == 0)
1369 val |= WPA_CIPHER_NONE;
1370 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
1371 val |= WPA_CIPHER_GTK_NOT_USED;
1372 else {
1373 os_free(buf);
1374 return -1;
1375 }
1376
1377 if (last)
1378 break;
1379 start = end + 1;
1380 }
1381 os_free(buf);
1382
1383 return val;
1384 }
1385
1386
1387 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
1388 {
1389 char *pos = start;
1390 int ret;
1391
1392 if (ciphers & WPA_CIPHER_CCMP_256) {
1393 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
1394 pos == start ? "" : delim);
1395 if (ret < 0 || ret >= end - pos)
1396 return -1;
1397 pos += ret;
1398 }
1399 if (ciphers & WPA_CIPHER_GCMP_256) {
1400 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
1401 pos == start ? "" : delim);
1402 if (ret < 0 || ret >= end - pos)
1403 return -1;
1404 pos += ret;
1405 }
1406 if (ciphers & WPA_CIPHER_CCMP) {
1407 ret = os_snprintf(pos, end - pos, "%sCCMP",
1408 pos == start ? "" : delim);
1409 if (ret < 0 || ret >= end - pos)
1410 return -1;
1411 pos += ret;
1412 }
1413 if (ciphers & WPA_CIPHER_GCMP) {
1414 ret = os_snprintf(pos, end - pos, "%sGCMP",
1415 pos == start ? "" : delim);
1416 if (ret < 0 || ret >= end - pos)
1417 return -1;
1418 pos += ret;
1419 }
1420 if (ciphers & WPA_CIPHER_TKIP) {
1421 ret = os_snprintf(pos, end - pos, "%sTKIP",
1422 pos == start ? "" : delim);
1423 if (ret < 0 || ret >= end - pos)
1424 return -1;
1425 pos += ret;
1426 }
1427 if (ciphers & WPA_CIPHER_WEP104) {
1428 ret = os_snprintf(pos, end - pos, "%sWEP104",
1429 pos == start ? "" : delim);
1430 if (ret < 0 || ret >= end - pos)
1431 return -1;
1432 pos += ret;
1433 }
1434 if (ciphers & WPA_CIPHER_WEP40) {
1435 ret = os_snprintf(pos, end - pos, "%sWEP40",
1436 pos == start ? "" : delim);
1437 if (ret < 0 || ret >= end - pos)
1438 return -1;
1439 pos += ret;
1440 }
1441 if (ciphers & WPA_CIPHER_NONE) {
1442 ret = os_snprintf(pos, end - pos, "%sNONE",
1443 pos == start ? "" : delim);
1444 if (ret < 0 || ret >= end - pos)
1445 return -1;
1446 pos += ret;
1447 }
1448
1449 return pos - start;
1450 }
1451
1452
1453 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
1454 {
1455 int pairwise = 0;
1456
1457 /* Select group cipher based on the enabled pairwise cipher suites */
1458 if (wpa & 1)
1459 pairwise |= wpa_pairwise;
1460 if (wpa & 2)
1461 pairwise |= rsn_pairwise;
1462
1463 if (pairwise & WPA_CIPHER_TKIP)
1464 return WPA_CIPHER_TKIP;
1465 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
1466 return WPA_CIPHER_GCMP;
1467 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
1468 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
1469 return WPA_CIPHER_GCMP_256;
1470 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
1471 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
1472 return WPA_CIPHER_CCMP_256;
1473 return WPA_CIPHER_CCMP;
1474 }
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