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Define allowed pairwise/group cipher suites in a header file
[thirdparty/hostap.git] / src / common / wpa_common.c
CommitLineData
6fc6879b
JM		 1/*
2 * WPA/RSN - Shared functions for supplicant and authenticator
edbd2a19 3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
9#include "includes.h"
10
11#include "common.h"
03da66bd
JM		 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"
6fc6879b
JM		 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 */
40int 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) {
6e6909a9 46#ifndef CONFIG_FIPS
6fc6879b 47 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
04b6b3ed 48 return hmac_md5(key, 16, buf, len, mic);
6e6909a9 49#endif /* CONFIG_FIPS */
6fc6879b 50 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
04b6b3ed
JM		 51 if (hmac_sha1(key, 16, buf, len, hash))
52 return -1;
6fc6879b
JM		 53 os_memcpy(mic, hash, MD5_MAC_LEN);
54 break;
a20088e5 55#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
6fc6879b
JM		 56 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
57 return omac1_aes_128(key, buf, len, mic);
a20088e5 58#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
6fc6879b
JM		 59 default:
60 return -1;
61 }
62
63 return 0;
64}
65
66
67/**
68 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
69 * @pmk: Pairwise master key
70 * @pmk_len: Length of PMK
71 * @label: Label to use in derivation
72 * @addr1: AA or SA
73 * @addr2: SA or AA
74 * @nonce1: ANonce or SNonce
75 * @nonce2: SNonce or ANonce
76 * @ptk: Buffer for pairwise transient key
77 * @ptk_len: Length of PTK
56586197 78 * @use_sha256: Whether to use SHA256-based KDF
6fc6879b
JM		 79 *
80 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
81 * PTK = PRF-X(PMK, "Pairwise key expansion",
82 * Min(AA, SA) || Max(AA, SA) ||
83 * Min(ANonce, SNonce) || Max(ANonce, SNonce))
84 *
85 * STK = PRF-X(SMK, "Peer key expansion",
86 * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
87 * Min(INonce, PNonce) || Max(INonce, PNonce))
88 */
89void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
90 const u8 *addr1, const u8 *addr2,
91 const u8 *nonce1, const u8 *nonce2,
56586197 92 u8 *ptk, size_t ptk_len, int use_sha256)
6fc6879b
JM		 93{
94 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
95
96 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
97 os_memcpy(data, addr1, ETH_ALEN);
98 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
99 } else {
100 os_memcpy(data, addr2, ETH_ALEN);
101 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
102 }
103
104 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
105 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
106 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
107 WPA_NONCE_LEN);
108 } else {
109 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
110 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
111 WPA_NONCE_LEN);
112 }
113
56586197
JM		 114#ifdef CONFIG_IEEE80211W
115 if (use_sha256)
116 sha256_prf(pmk, pmk_len, label, data, sizeof(data),
117 ptk, ptk_len);
118 else
119#endif /* CONFIG_IEEE80211W */
120 sha1_prf(pmk, pmk_len, label, data, sizeof(data), ptk,
121 ptk_len);
6fc6879b
JM		 122
123 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
124 MAC2STR(addr1), MAC2STR(addr2));
bc8318ac
JM		 125 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
126 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
6fc6879b
JM		 127 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
128 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", ptk, ptk_len);
129}
130
131
132#ifdef CONFIG_IEEE80211R
133int wpa_ft_mic(const u8 *kck, const u8 *sta_addr, const u8 *ap_addr,
134 u8 transaction_seqnum, const u8 *mdie, size_t mdie_len,
135 const u8 *ftie, size_t ftie_len,
136 const u8 *rsnie, size_t rsnie_len,
137 const u8 *ric, size_t ric_len, u8 *mic)
138{
139 u8 *buf, *pos;
140 size_t buf_len;
141
142 buf_len = 2 * ETH_ALEN + 1 + mdie_len + ftie_len + rsnie_len + ric_len;
143 buf = os_malloc(buf_len);
144 if (buf == NULL)
145 return -1;
146
147 pos = buf;
148 os_memcpy(pos, sta_addr, ETH_ALEN);
149 pos += ETH_ALEN;
150 os_memcpy(pos, ap_addr, ETH_ALEN);
151 pos += ETH_ALEN;
152 *pos++ = transaction_seqnum;
153 if (rsnie) {
154 os_memcpy(pos, rsnie, rsnie_len);
155 pos += rsnie_len;
156 }
157 if (mdie) {
158 os_memcpy(pos, mdie, mdie_len);
159 pos += mdie_len;
160 }
161 if (ftie) {
162 struct rsn_ftie *_ftie;
163 os_memcpy(pos, ftie, ftie_len);
164 if (ftie_len < 2 + sizeof(*_ftie)) {
165 os_free(buf);
166 return -1;
167 }
168 _ftie = (struct rsn_ftie *) (pos + 2);
169 os_memset(_ftie->mic, 0, sizeof(_ftie->mic));
170 pos += ftie_len;
171 }
172 if (ric) {
173 os_memcpy(pos, ric, ric_len);
174 pos += ric_len;
175 }
176
177 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", buf, pos - buf);
178 if (omac1_aes_128(kck, buf, pos - buf, mic)) {
179 os_free(buf);
180 return -1;
181 }
182
183 os_free(buf);
184
185 return 0;
186}
6554237f
JM		 187
188
189static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
190 struct wpa_ft_ies *parse)
191{
192 const u8 *end, *pos;
193
194 parse->ftie = ie;
195 parse->ftie_len = ie_len;
196
197 pos = ie + sizeof(struct rsn_ftie);
198 end = ie + ie_len;
199
200 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
201 switch (pos[0]) {
202 case FTIE_SUBELEM_R1KH_ID:
203 if (pos[1] != FT_R1KH_ID_LEN) {
204 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
205 "length in FTIE: %d", pos[1]);
206 return -1;
207 }
208 parse->r1kh_id = pos + 2;
209 break;
210 case FTIE_SUBELEM_GTK:
211 parse->gtk = pos + 2;
212 parse->gtk_len = pos[1];
213 break;
214 case FTIE_SUBELEM_R0KH_ID:
215 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
216 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
217 "length in FTIE: %d", pos[1]);
218 return -1;
219 }
220 parse->r0kh_id = pos + 2;
221 parse->r0kh_id_len = pos[1];
222 break;
223#ifdef CONFIG_IEEE80211W
224 case FTIE_SUBELEM_IGTK:
225 parse->igtk = pos + 2;
226 parse->igtk_len = pos[1];
227 break;
228#endif /* CONFIG_IEEE80211W */
229 }
230
231 pos += 2 + pos[1];
232 }
233
234 return 0;
235}
236
237
238int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
239 struct wpa_ft_ies *parse)
240{
241 const u8 *end, *pos;
242 struct wpa_ie_data data;
243 int ret;
244 const struct rsn_ftie *ftie;
245 int prot_ie_count = 0;
246
247 os_memset(parse, 0, sizeof(*parse));
248 if (ies == NULL)
249 return 0;
250
251 pos = ies;
252 end = ies + ies_len;
253 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
254 switch (pos[0]) {
255 case WLAN_EID_RSN:
256 parse->rsn = pos + 2;
257 parse->rsn_len = pos[1];
258 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
259 parse->rsn_len + 2,
260 &data);
261 if (ret < 0) {
262 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
263 "RSN IE: %d", ret);
264 return -1;
265 }
266 if (data.num_pmkid == 1 && data.pmkid)
267 parse->rsn_pmkid = data.pmkid;
268 break;
269 case WLAN_EID_MOBILITY_DOMAIN:
270 parse->mdie = pos + 2;
271 parse->mdie_len = pos[1];
272 break;
273 case WLAN_EID_FAST_BSS_TRANSITION:
274 if (pos[1] < sizeof(*ftie))
275 return -1;
276 ftie = (const struct rsn_ftie *) (pos + 2);
277 prot_ie_count = ftie->mic_control[1];
278 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
279 return -1;
280 break;
281 case WLAN_EID_TIMEOUT_INTERVAL:
282 parse->tie = pos + 2;
283 parse->tie_len = pos[1];
284 break;
285 case WLAN_EID_RIC_DATA:
286 if (parse->ric == NULL)
287 parse->ric = pos;
288 break;
289 }
290
291 pos += 2 + pos[1];
292 }
293
294 if (prot_ie_count == 0)
295 return 0; /* no MIC */
296
297 /*
298 * Check that the protected IE count matches with IEs included in the
299 * frame.
300 */
301 if (parse->rsn)
302 prot_ie_count--;
303 if (parse->mdie)
304 prot_ie_count--;
305 if (parse->ftie)
306 prot_ie_count--;
307 if (prot_ie_count < 0) {
308 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
309 "the protected IE count");
310 return -1;
311 }
312
313 if (prot_ie_count == 0 && parse->ric) {
314 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
315 "included in protected IE count");
316 return -1;
317 }
318
319 /* Determine the end of the RIC IE(s) */
320 pos = parse->ric;
321 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
322 prot_ie_count) {
323 prot_ie_count--;
324 pos += 2 + pos[1];
325 }
326 parse->ric_len = pos - parse->ric;
327 if (prot_ie_count) {
328 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
329 "frame", (int) prot_ie_count);
330 return -1;
331 }
332
333 return 0;
334}
6fc6879b
JM		 335#endif /* CONFIG_IEEE80211R */
336
337
338#ifndef CONFIG_NO_WPA2
339static int rsn_selector_to_bitfield(const u8 *s)
340{
341 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
342 return WPA_CIPHER_NONE;
343 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP40)
344 return WPA_CIPHER_WEP40;
345 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
346 return WPA_CIPHER_TKIP;
347 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
348 return WPA_CIPHER_CCMP;
349 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104)
350 return WPA_CIPHER_WEP104;
351#ifdef CONFIG_IEEE80211W
352 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
353 return WPA_CIPHER_AES_128_CMAC;
354#endif /* CONFIG_IEEE80211W */
eb7719ff
JM		 355 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
356 return WPA_CIPHER_GCMP;
6fc6879b
JM		 357 return 0;
358}
359
360
361static int rsn_key_mgmt_to_bitfield(const u8 *s)
362{
363 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
364 return WPA_KEY_MGMT_IEEE8021X;
365 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
366 return WPA_KEY_MGMT_PSK;
367#ifdef CONFIG_IEEE80211R
368 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
369 return WPA_KEY_MGMT_FT_IEEE8021X;
370 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
371 return WPA_KEY_MGMT_FT_PSK;
372#endif /* CONFIG_IEEE80211R */
56586197
JM		 373#ifdef CONFIG_IEEE80211W
374 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
375 return WPA_KEY_MGMT_IEEE8021X_SHA256;
376 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
377 return WPA_KEY_MGMT_PSK_SHA256;
378#endif /* CONFIG_IEEE80211W */
c10347f2
JM		 379#ifdef CONFIG_SAE
380 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
381 return WPA_KEY_MGMT_SAE;
382 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
383 return WPA_KEY_MGMT_FT_SAE;
384#endif /* CONFIG_SAE */
6fc6879b
JM		 385 return 0;
386}
387#endif /* CONFIG_NO_WPA2 */
388
389
390/**
391 * wpa_parse_wpa_ie_rsn - Parse RSN IE
392 * @rsn_ie: Buffer containing RSN IE
393 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
394 * @data: Pointer to structure that will be filled in with parsed data
395 * Returns: 0 on success, <0 on failure
396 */
397int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
398 struct wpa_ie_data *data)
399{
400#ifndef CONFIG_NO_WPA2
401 const struct rsn_ie_hdr *hdr;
402 const u8 *pos;
403 int left;
404 int i, count;
405
406 os_memset(data, 0, sizeof(*data));
407 data->proto = WPA_PROTO_RSN;
408 data->pairwise_cipher = WPA_CIPHER_CCMP;
409 data->group_cipher = WPA_CIPHER_CCMP;
410 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
411 data->capabilities = 0;
412 data->pmkid = NULL;
413 data->num_pmkid = 0;
414#ifdef CONFIG_IEEE80211W
415 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
416#else /* CONFIG_IEEE80211W */
417 data->mgmt_group_cipher = 0;
418#endif /* CONFIG_IEEE80211W */
419
420 if (rsn_ie_len == 0) {
421 /* No RSN IE - fail silently */
422 return -1;
423 }
424
425 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
426 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
427 __func__, (unsigned long) rsn_ie_len);
428 return -1;
429 }
430
431 hdr = (const struct rsn_ie_hdr *) rsn_ie;
432
433 if (hdr->elem_id != WLAN_EID_RSN ||
434 hdr->len != rsn_ie_len - 2 ||
435 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
436 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
437 __func__);
438 return -2;
439 }
440
441 pos = (const u8 *) (hdr + 1);
442 left = rsn_ie_len - sizeof(*hdr);
443
444 if (left >= RSN_SELECTOR_LEN) {
445 data->group_cipher = rsn_selector_to_bitfield(pos);
446#ifdef CONFIG_IEEE80211W
447 if (data->group_cipher == WPA_CIPHER_AES_128_CMAC) {
448 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as group "
449 "cipher", __func__);
450 return -1;
451 }
452#endif /* CONFIG_IEEE80211W */
453 pos += RSN_SELECTOR_LEN;
454 left -= RSN_SELECTOR_LEN;
455 } else if (left > 0) {
456 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
457 __func__, left);
458 return -3;
459 }
460
461 if (left >= 2) {
462 data->pairwise_cipher = 0;
463 count = WPA_GET_LE16(pos);
464 pos += 2;
465 left -= 2;
466 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
467 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
468 "count %u left %u", __func__, count, left);
469 return -4;
470 }
471 for (i = 0; i < count; i++) {
472 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
473 pos += RSN_SELECTOR_LEN;
474 left -= RSN_SELECTOR_LEN;
475 }
476#ifdef CONFIG_IEEE80211W
477 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
478 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
479 "pairwise cipher", __func__);
480 return -1;
481 }
482#endif /* CONFIG_IEEE80211W */
483 } else if (left == 1) {
484 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
485 __func__);
486 return -5;
487 }
488
489 if (left >= 2) {
490 data->key_mgmt = 0;
491 count = WPA_GET_LE16(pos);
492 pos += 2;
493 left -= 2;
494 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
495 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
496 "count %u left %u", __func__, count, left);
497 return -6;
498 }
499 for (i = 0; i < count; i++) {
500 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
501 pos += RSN_SELECTOR_LEN;
502 left -= RSN_SELECTOR_LEN;
503 }
504 } else if (left == 1) {
505 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
506 __func__);
507 return -7;
508 }
509
510 if (left >= 2) {
511 data->capabilities = WPA_GET_LE16(pos);
512 pos += 2;
513 left -= 2;
514 }
515
516 if (left >= 2) {
517 data->num_pmkid = WPA_GET_LE16(pos);
518 pos += 2;
519 left -= 2;
520 if (left < (int) data->num_pmkid * PMKID_LEN) {
521 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
522 "(num_pmkid=%lu left=%d)",
523 __func__, (unsigned long) data->num_pmkid,
524 left);
525 data->num_pmkid = 0;
526 return -9;
527 } else {
528 data->pmkid = pos;
529 pos += data->num_pmkid * PMKID_LEN;
530 left -= data->num_pmkid * PMKID_LEN;
531 }
532 }
533
534#ifdef CONFIG_IEEE80211W
535 if (left >= 4) {
536 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
537 if (data->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) {
538 wpa_printf(MSG_DEBUG, "%s: Unsupported management "
539 "group cipher 0x%x", __func__,
540 data->mgmt_group_cipher);
541 return -10;
542 }
543 pos += RSN_SELECTOR_LEN;
544 left -= RSN_SELECTOR_LEN;
545 }
546#endif /* CONFIG_IEEE80211W */
547
548 if (left > 0) {
549 wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
550 __func__, left);
551 }
552
553 return 0;
554#else /* CONFIG_NO_WPA2 */
555 return -1;
556#endif /* CONFIG_NO_WPA2 */
557}
558
559
f3b87561
JM		 560static int wpa_selector_to_bitfield(const u8 *s)
561{
562 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
563 return WPA_CIPHER_NONE;
564 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
565 return WPA_CIPHER_WEP40;
566 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
567 return WPA_CIPHER_TKIP;
568 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
569 return WPA_CIPHER_CCMP;
570 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
571 return WPA_CIPHER_WEP104;
572 return 0;
573}
574
575
576static int wpa_key_mgmt_to_bitfield(const u8 *s)
577{
578 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
579 return WPA_KEY_MGMT_IEEE8021X;
580 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
581 return WPA_KEY_MGMT_PSK;
582 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
583 return WPA_KEY_MGMT_WPA_NONE;
584 return 0;
585}
586
587
588int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
589 struct wpa_ie_data *data)
590{
591 const struct wpa_ie_hdr *hdr;
592 const u8 *pos;
593 int left;
594 int i, count;
595
596 os_memset(data, 0, sizeof(*data));
597 data->proto = WPA_PROTO_WPA;
598 data->pairwise_cipher = WPA_CIPHER_TKIP;
599 data->group_cipher = WPA_CIPHER_TKIP;
600 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
601 data->capabilities = 0;
602 data->pmkid = NULL;
603 data->num_pmkid = 0;
604 data->mgmt_group_cipher = 0;
605
606 if (wpa_ie_len == 0) {
607 /* No WPA IE - fail silently */
608 return -1;
609 }
610
611 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
612 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
613 __func__, (unsigned long) wpa_ie_len);
614 return -1;
615 }
616
617 hdr = (const struct wpa_ie_hdr *) wpa_ie;
618
619 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
620 hdr->len != wpa_ie_len - 2 ||
621 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
622 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
623 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
624 __func__);
625 return -2;
626 }
627
628 pos = (const u8 *) (hdr + 1);
629 left = wpa_ie_len - sizeof(*hdr);
630
631 if (left >= WPA_SELECTOR_LEN) {
632 data->group_cipher = wpa_selector_to_bitfield(pos);
633 pos += WPA_SELECTOR_LEN;
634 left -= WPA_SELECTOR_LEN;
635 } else if (left > 0) {
636 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
637 __func__, left);
638 return -3;
639 }
640
641 if (left >= 2) {
642 data->pairwise_cipher = 0;
643 count = WPA_GET_LE16(pos);
644 pos += 2;
645 left -= 2;
646 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
647 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
648 "count %u left %u", __func__, count, left);
649 return -4;
650 }
651 for (i = 0; i < count; i++) {
652 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
653 pos += WPA_SELECTOR_LEN;
654 left -= WPA_SELECTOR_LEN;
655 }
656 } else if (left == 1) {
657 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
658 __func__);
659 return -5;
660 }
661
662 if (left >= 2) {
663 data->key_mgmt = 0;
664 count = WPA_GET_LE16(pos);
665 pos += 2;
666 left -= 2;
667 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
668 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
669 "count %u left %u", __func__, count, left);
670 return -6;
671 }
672 for (i = 0; i < count; i++) {
673 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
674 pos += WPA_SELECTOR_LEN;
675 left -= WPA_SELECTOR_LEN;
676 }
677 } else if (left == 1) {
678 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
679 __func__);
680 return -7;
681 }
682
683 if (left >= 2) {
684 data->capabilities = WPA_GET_LE16(pos);
685 pos += 2;
686 left -= 2;
687 }
688
689 if (left > 0) {
690 wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
691 __func__, left);
692 }
693
694 return 0;
695}
696
697
6fc6879b
JM		 698#ifdef CONFIG_IEEE80211R
699
700/**
701 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
702 *
c1e033b0 703 * IEEE Std 802.11r-2008 - 8.5.1.5.3
6fc6879b
JM		 704 */
705void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
706 const u8 *ssid, size_t ssid_len,
707 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
708 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
709{
710 u8 buf[1 + WPA_MAX_SSID_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
711 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
712 u8 *pos, r0_key_data[48], hash[32];
713 const u8 *addr[2];
714 size_t len[2];
715
716 /*
717 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
718 * SSIDlength || SSID || MDID || R0KHlength ||
719 * R0KH-ID || S0KH-ID)
720 * XXKey is either the second 256 bits of MSK or PSK.
721 * PMK-R0 = L(R0-Key-Data, 0, 256)
722 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
723 */
724 if (ssid_len > WPA_MAX_SSID_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
725 return;
726 pos = buf;
727 *pos++ = ssid_len;
728 os_memcpy(pos, ssid, ssid_len);
729 pos += ssid_len;
730 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
731 pos += MOBILITY_DOMAIN_ID_LEN;
732 *pos++ = r0kh_id_len;
733 os_memcpy(pos, r0kh_id, r0kh_id_len);
734 pos += r0kh_id_len;
735 os_memcpy(pos, s0kh_id, ETH_ALEN);
736 pos += ETH_ALEN;
737
738 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
739 r0_key_data, sizeof(r0_key_data));
740 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
741
742 /*
743 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
744 */
745 addr[0] = (const u8 *) "FT-R0N";
746 len[0] = 6;
747 addr[1] = r0_key_data + PMK_LEN;
748 len[1] = 16;
749
750 sha256_vector(2, addr, len, hash);
751 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
752}
753
754
755/**
756 * wpa_derive_pmk_r1_name - Derive PMKR1Name
757 *
c1e033b0 758 * IEEE Std 802.11r-2008 - 8.5.1.5.4
6fc6879b
JM		 759 */
760void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
761 const u8 *s1kh_id, u8 *pmk_r1_name)
762{
763 u8 hash[32];
764 const u8 *addr[4];
765 size_t len[4];
766
767 /*
768 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
769 * R1KH-ID || S1KH-ID))
770 */
771 addr[0] = (const u8 *) "FT-R1N";
772 len[0] = 6;
773 addr[1] = pmk_r0_name;
774 len[1] = WPA_PMK_NAME_LEN;
775 addr[2] = r1kh_id;
776 len[2] = FT_R1KH_ID_LEN;
777 addr[3] = s1kh_id;
778 len[3] = ETH_ALEN;
779
780 sha256_vector(4, addr, len, hash);
781 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
782}
783
784
785/**
786 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
787 *
c1e033b0 788 * IEEE Std 802.11r-2008 - 8.5.1.5.4
6fc6879b
JM		 789 */
790void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
791 const u8 *r1kh_id, const u8 *s1kh_id,
792 u8 *pmk_r1, u8 *pmk_r1_name)
793{
794 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
795 u8 *pos;
796
797 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
798 pos = buf;
799 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
800 pos += FT_R1KH_ID_LEN;
801 os_memcpy(pos, s1kh_id, ETH_ALEN);
802 pos += ETH_ALEN;
803
804 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
805
806 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
807}
808
809
810/**
811 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
812 *
c1e033b0 813 * IEEE Std 802.11r-2008 - 8.5.1.5.5
6fc6879b
JM		 814 */
815void wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
816 const u8 *sta_addr, const u8 *bssid,
817 const u8 *pmk_r1_name,
818 u8 *ptk, size_t ptk_len, u8 *ptk_name)
819{
820 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
821 u8 *pos, hash[32];
822 const u8 *addr[6];
823 size_t len[6];
824
825 /*
826 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
827 * BSSID || STA-ADDR)
828 */
829 pos = buf;
830 os_memcpy(pos, snonce, WPA_NONCE_LEN);
831 pos += WPA_NONCE_LEN;
832 os_memcpy(pos, anonce, WPA_NONCE_LEN);
833 pos += WPA_NONCE_LEN;
834 os_memcpy(pos, bssid, ETH_ALEN);
835 pos += ETH_ALEN;
836 os_memcpy(pos, sta_addr, ETH_ALEN);
837 pos += ETH_ALEN;
838
839 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, ptk, ptk_len);
840
841 /*
842 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
843 * ANonce || BSSID || STA-ADDR))
844 */
845 addr[0] = pmk_r1_name;
846 len[0] = WPA_PMK_NAME_LEN;
847 addr[1] = (const u8 *) "FT-PTKN";
848 len[1] = 7;
849 addr[2] = snonce;
850 len[2] = WPA_NONCE_LEN;
851 addr[3] = anonce;
852 len[3] = WPA_NONCE_LEN;
853 addr[4] = bssid;
854 len[4] = ETH_ALEN;
855 addr[5] = sta_addr;
856 len[5] = ETH_ALEN;
857
858 sha256_vector(6, addr, len, hash);
859 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
860}
861
862#endif /* CONFIG_IEEE80211R */
13268290
JM		 863
864
865/**
866 * rsn_pmkid - Calculate PMK identifier
867 * @pmk: Pairwise master key
868 * @pmk_len: Length of pmk in bytes
869 * @aa: Authenticator address
870 * @spa: Supplicant address
871 * @pmkid: Buffer for PMKID
872 * @use_sha256: Whether to use SHA256-based KDF
873 *
874 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
875 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
876 */
877void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
878 u8 *pmkid, int use_sha256)
879{
880 char *title = "PMK Name";
881 const u8 *addr[3];
882 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
883 unsigned char hash[SHA256_MAC_LEN];
884
885 addr[0] = (u8 *) title;
886 addr[1] = aa;
887 addr[2] = spa;
888
889#ifdef CONFIG_IEEE80211W
890 if (use_sha256)
891 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
892 else
893#endif /* CONFIG_IEEE80211W */
894 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
895 os_memcpy(pmkid, hash, PMKID_LEN);
896}
43fb5297
JM		 897
898
899/**
900 * wpa_cipher_txt - Convert cipher suite to a text string
901 * @cipher: Cipher suite (WPA_CIPHER_* enum)
902 * Returns: Pointer to a text string of the cipher suite name
903 */
904const char * wpa_cipher_txt(int cipher)
905{
906 switch (cipher) {
907 case WPA_CIPHER_NONE:
908 return "NONE";
909 case WPA_CIPHER_WEP40:
910 return "WEP-40";
911 case WPA_CIPHER_WEP104:
912 return "WEP-104";
913 case WPA_CIPHER_TKIP:
914 return "TKIP";
915 case WPA_CIPHER_CCMP:
916 return "CCMP";
917 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
918 return "CCMP+TKIP";
eb7719ff
JM		 919 case WPA_CIPHER_GCMP:
920 return "GCMP";
43fb5297
JM		 921 default:
922 return "UNKNOWN";
923 }
924}
925
926
927/**
928 * wpa_key_mgmt_txt - Convert key management suite to a text string
929 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
930 * @proto: WPA/WPA2 version (WPA_PROTO_*)
931 * Returns: Pointer to a text string of the key management suite name
932 */
933const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
934{
935 switch (key_mgmt) {
936 case WPA_KEY_MGMT_IEEE8021X:
937 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
938 return "WPA2+WPA/IEEE 802.1X/EAP";
939 return proto == WPA_PROTO_RSN ?
940 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
941 case WPA_KEY_MGMT_PSK:
942 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
943 return "WPA2-PSK+WPA-PSK";
944 return proto == WPA_PROTO_RSN ?
945 "WPA2-PSK" : "WPA-PSK";
946 case WPA_KEY_MGMT_NONE:
947 return "NONE";
948 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
949 return "IEEE 802.1X (no WPA)";
950#ifdef CONFIG_IEEE80211R
951 case WPA_KEY_MGMT_FT_IEEE8021X:
952 return "FT-EAP";
953 case WPA_KEY_MGMT_FT_PSK:
954 return "FT-PSK";
955#endif /* CONFIG_IEEE80211R */
956#ifdef CONFIG_IEEE80211W
957 case WPA_KEY_MGMT_IEEE8021X_SHA256:
958 return "WPA2-EAP-SHA256";
959 case WPA_KEY_MGMT_PSK_SHA256:
960 return "WPA2-PSK-SHA256";
961#endif /* CONFIG_IEEE80211W */
962 default:
963 return "UNKNOWN";
964 }
965}
26e23750
JM		 966
967
968int wpa_compare_rsn_ie(int ft_initial_assoc,
969 const u8 *ie1, size_t ie1len,
970 const u8 *ie2, size_t ie2len)
971{
d3ccead3
JM		 972 if (ie1 == NULL || ie2 == NULL)
973 return -1;
974
26e23750
JM		 975 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
976 return 0; /* identical IEs */
977
978#ifdef CONFIG_IEEE80211R
979 if (ft_initial_assoc) {
980 struct wpa_ie_data ie1d, ie2d;
981 /*
982 * The PMKID-List in RSN IE is different between Beacon/Probe
983 * Response/(Re)Association Request frames and EAPOL-Key
984 * messages in FT initial mobility domain association. Allow
985 * for this, but verify that other parts of the RSN IEs are
986 * identical.
987 */
988 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
989 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
990 return -1;
991 if (ie1d.proto == ie2d.proto &&
992 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
993 ie1d.group_cipher == ie2d.group_cipher &&
994 ie1d.key_mgmt == ie2d.key_mgmt &&
995 ie1d.capabilities == ie2d.capabilities &&
996 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
997 return 0;
998 }
999#endif /* CONFIG_IEEE80211R */
1000
1001 return -1;
1002}
1003
1004
1005#ifdef CONFIG_IEEE80211R
1006int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
1007{
1008 u8 *start, *end, *rpos, *rend;
1009 int added = 0;
1010
1011 start = ies;
1012 end = ies + ies_len;
1013
1014 while (start < end) {
1015 if (*start == WLAN_EID_RSN)
1016 break;
1017 start += 2 + start[1];
1018 }
1019 if (start >= end) {
1020 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1021 "IEs data");
1022 return -1;
1023 }
1024 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1025 start, 2 + start[1]);
1026
1027 /* Find start of PMKID-Count */
1028 rpos = start + 2;
1029 rend = rpos + start[1];
1030
1031 /* Skip Version and Group Data Cipher Suite */
1032 rpos += 2 + 4;
1033 /* Skip Pairwise Cipher Suite Count and List */
1034 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1035 /* Skip AKM Suite Count and List */
1036 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1037
1038 if (rpos == rend) {
1039 /* Add RSN Capabilities */
1040 os_memmove(rpos + 2, rpos, end - rpos);
1041 *rpos++ = 0;
1042 *rpos++ = 0;
1043 } else {
1044 /* Skip RSN Capabilities */
1045 rpos += 2;
1046 if (rpos > rend) {
1047 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1048 "IEs data");
1049 return -1;
1050 }
1051 }
1052
1053 if (rpos == rend) {
1054 /* No PMKID-Count field included; add it */
1055 os_memmove(rpos + 2 + PMKID_LEN, rpos, end - rpos);
1056 WPA_PUT_LE16(rpos, 1);
1057 rpos += 2;
1058 os_memcpy(rpos, pmkid, PMKID_LEN);
1059 added += 2 + PMKID_LEN;
1060 start[1] += 2 + PMKID_LEN;
1061 } else {
1062 /* PMKID-Count was included; use it */
1063 if (WPA_GET_LE16(rpos) != 0) {
1064 wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
1065 "in RSN IE in EAPOL-Key data");
1066 return -1;
1067 }
1068 WPA_PUT_LE16(rpos, 1);
1069 rpos += 2;
1070 os_memmove(rpos + PMKID_LEN, rpos, end - rpos);
1071 os_memcpy(rpos, pmkid, PMKID_LEN);
1072 added += PMKID_LEN;
1073 start[1] += PMKID_LEN;
1074 }
1075
1076 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1077 "(PMKID inserted)", start, 2 + start[1]);
1078
1079 return added;
1080}
1081#endif /* CONFIG_IEEE80211R */
c3550295
JM		 1082
1083
1084int wpa_cipher_key_len(int cipher)
1085{
1086 switch (cipher) {
1087 case WPA_CIPHER_CCMP:
1088 case WPA_CIPHER_GCMP:
1089 return 16;
1090 case WPA_CIPHER_TKIP:
1091 return 32;
1092 case WPA_CIPHER_WEP104:
1093 return 13;
1094 case WPA_CIPHER_WEP40:
1095 return 5;
1096 }
1097
1098 return 0;
1099}
1100
1101
1102int wpa_cipher_rsc_len(int cipher)
1103{
1104 switch (cipher) {
1105 case WPA_CIPHER_CCMP:
1106 case WPA_CIPHER_GCMP:
1107 case WPA_CIPHER_TKIP:
1108 return 6;
1109 case WPA_CIPHER_WEP104:
1110 case WPA_CIPHER_WEP40:
1111 return 0;
1112 }
1113
1114 return 0;
1115}
1116
1117
1118int wpa_cipher_to_alg(int cipher)
1119{
1120 switch (cipher) {
1121 case WPA_CIPHER_CCMP:
1122 return WPA_ALG_CCMP;
1123 case WPA_CIPHER_GCMP:
1124 return WPA_ALG_GCMP;
1125 case WPA_CIPHER_TKIP:
1126 return WPA_ALG_TKIP;
1127 case WPA_CIPHER_WEP104:
1128 case WPA_CIPHER_WEP40:
1129 return WPA_ALG_WEP;
1130 }
1131 return WPA_ALG_NONE;
1132}
1133
1134
1135int wpa_cipher_valid_pairwise(int cipher)
1136{
1137 return cipher == WPA_CIPHER_CCMP ||
1138 cipher == WPA_CIPHER_GCMP ||
1139 cipher == WPA_CIPHER_TKIP;
1140}
1141
1142
1143u32 wpa_cipher_to_suite(int proto, int cipher)
1144{
1145 if (cipher & WPA_CIPHER_CCMP)
1146 return (proto == WPA_PROTO_RSN ?
1147 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1148 if (cipher & WPA_CIPHER_GCMP)
1149 return RSN_CIPHER_SUITE_GCMP;
1150 if (cipher & WPA_CIPHER_TKIP)
1151 return (proto == WPA_PROTO_RSN ?
1152 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1153 if (cipher & WPA_CIPHER_WEP104)
1154 return (proto == WPA_PROTO_RSN ?
1155 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1156 if (cipher & WPA_CIPHER_WEP40)
1157 return (proto == WPA_PROTO_RSN ?
1158 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1159 if (cipher & WPA_CIPHER_NONE)
1160 return (proto == WPA_PROTO_RSN ?
1161 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1162 return 0;
1163}
1164
1165
1166int rsn_cipher_put_suites(u8 *pos, int ciphers)
1167{
1168 int num_suites = 0;
1169
1170 if (ciphers & WPA_CIPHER_CCMP) {
1171 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1172 pos += RSN_SELECTOR_LEN;
1173 num_suites++;
1174 }
1175 if (ciphers & WPA_CIPHER_GCMP) {
1176 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1177 pos += RSN_SELECTOR_LEN;
1178 num_suites++;
1179 }
1180 if (ciphers & WPA_CIPHER_TKIP) {
1181 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1182 pos += RSN_SELECTOR_LEN;
1183 num_suites++;
1184 }
1185 if (ciphers & WPA_CIPHER_NONE) {
1186 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1187 pos += RSN_SELECTOR_LEN;
1188 num_suites++;
1189 }
1190
1191 return num_suites;
1192}
1193
1194
1195int wpa_cipher_put_suites(u8 *pos, int ciphers)
1196{
1197 int num_suites = 0;
1198
1199 if (ciphers & WPA_CIPHER_CCMP) {
1200 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1201 pos += WPA_SELECTOR_LEN;
1202 num_suites++;
1203 }
1204 if (ciphers & WPA_CIPHER_TKIP) {
1205 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1206 pos += WPA_SELECTOR_LEN;
1207 num_suites++;
1208 }
1209 if (ciphers & WPA_CIPHER_NONE) {
1210 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1211 pos += WPA_SELECTOR_LEN;
1212 num_suites++;
1213 }
1214
1215 return num_suites;
1216}
edbd2a19
JM		 1217
1218
1219int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1220{
1221 if (ciphers & WPA_CIPHER_CCMP)
1222 return WPA_CIPHER_CCMP;
1223 if (ciphers & WPA_CIPHER_GCMP)
1224 return WPA_CIPHER_GCMP;
1225 if (ciphers & WPA_CIPHER_TKIP)
1226 return WPA_CIPHER_TKIP;
1227 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1228 return WPA_CIPHER_NONE;
1229 return -1;
1230}
1231
1232
1233int wpa_pick_group_cipher(int ciphers)
1234{
1235 if (ciphers & WPA_CIPHER_CCMP)
1236 return WPA_CIPHER_CCMP;
1237 if (ciphers & WPA_CIPHER_GCMP)
1238 return WPA_CIPHER_GCMP;
1239 if (ciphers & WPA_CIPHER_TKIP)
1240 return WPA_CIPHER_TKIP;
1241 if (ciphers & WPA_CIPHER_WEP104)
1242 return WPA_CIPHER_WEP104;
1243 if (ciphers & WPA_CIPHER_WEP40)
1244 return WPA_CIPHER_WEP40;
1245 return -1;
1246}
a39c78be
JM		 1247
1248
1249int wpa_parse_cipher(const char *value)
1250{
1251 int val = 0, last;
1252 char *start, *end, *buf;
1253
1254 buf = os_strdup(value);
1255 if (buf == NULL)
1256 return -1;
1257 start = buf;
1258
1259 while (*start != '\0') {
1260 while (*start == ' ' || *start == '\t')
1261 start++;
1262 if (*start == '\0')
1263 break;
1264 end = start;
1265 while (*end != ' ' && *end != '\t' && *end != '\0')
1266 end++;
1267 last = *end == '\0';
1268 *end = '\0';
1269 if (os_strcmp(start, "CCMP") == 0)
1270 val |= WPA_CIPHER_CCMP;
1271 else if (os_strcmp(start, "GCMP") == 0)
1272 val |= WPA_CIPHER_GCMP;
1273 else if (os_strcmp(start, "TKIP") == 0)
1274 val |= WPA_CIPHER_TKIP;
1275 else if (os_strcmp(start, "WEP104") == 0)
1276 val |= WPA_CIPHER_WEP104;
1277 else if (os_strcmp(start, "WEP40") == 0)
1278 val |= WPA_CIPHER_WEP40;
1279 else if (os_strcmp(start, "NONE") == 0)
1280 val |= WPA_CIPHER_NONE;
1281 else {
1282 os_free(buf);
1283 return -1;
1284 }
1285
1286 if (last)
1287 break;
1288 start = end + 1;
1289 }
1290 os_free(buf);
1291
1292 return val;
1293}
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