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P2P: Do not create another group interface on NFC Token enable
[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 */
a5d75636
JM		 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 */
6fc6879b
JM		 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
56586197 83 * @use_sha256: Whether to use SHA256-based KDF
6fc6879b
JM		 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 */
94void 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,
56586197 97 u8 *ptk, size_t ptk_len, int use_sha256)
6fc6879b
JM		 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
56586197
JM		 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);
6fc6879b
JM		 127
128 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
129 MAC2STR(addr1), MAC2STR(addr2));
bc8318ac
JM		 130 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
131 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
6fc6879b
JM		 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
138int 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}
6554237f
JM		 192
193
194static 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
243int 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}
6fc6879b
JM		 340#endif /* CONFIG_IEEE80211R */
341
342
6fc6879b
JM		 343static 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 */
eb7719ff
JM		 359 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
360 return WPA_CIPHER_GCMP;
30675c34
JM		 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;
6fc6879b
JM		 371 return 0;
372}
373
374
375static int rsn_key_mgmt_to_bitfield(const u8 *s)
376{
377 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
378 return WPA_KEY_MGMT_IEEE8021X;
379 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
380 return WPA_KEY_MGMT_PSK;
381#ifdef CONFIG_IEEE80211R
382 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
383 return WPA_KEY_MGMT_FT_IEEE8021X;
384 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
385 return WPA_KEY_MGMT_FT_PSK;
386#endif /* CONFIG_IEEE80211R */
56586197
JM		 387#ifdef CONFIG_IEEE80211W
388 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
389 return WPA_KEY_MGMT_IEEE8021X_SHA256;
390 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
391 return WPA_KEY_MGMT_PSK_SHA256;
392#endif /* CONFIG_IEEE80211W */
c10347f2
JM		 393#ifdef CONFIG_SAE
394 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
395 return WPA_KEY_MGMT_SAE;
396 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
397 return WPA_KEY_MGMT_FT_SAE;
398#endif /* CONFIG_SAE */
6fc6879b
JM		 399 return 0;
400}
6fc6879b
JM		 401
402
403/**
404 * wpa_parse_wpa_ie_rsn - Parse RSN IE
405 * @rsn_ie: Buffer containing RSN IE
406 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
407 * @data: Pointer to structure that will be filled in with parsed data
408 * Returns: 0 on success, <0 on failure
409 */
410int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
411 struct wpa_ie_data *data)
412{
6fc6879b
JM		 413 const struct rsn_ie_hdr *hdr;
414 const u8 *pos;
415 int left;
416 int i, count;
417
418 os_memset(data, 0, sizeof(*data));
419 data->proto = WPA_PROTO_RSN;
420 data->pairwise_cipher = WPA_CIPHER_CCMP;
421 data->group_cipher = WPA_CIPHER_CCMP;
422 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
423 data->capabilities = 0;
424 data->pmkid = NULL;
425 data->num_pmkid = 0;
426#ifdef CONFIG_IEEE80211W
427 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
428#else /* CONFIG_IEEE80211W */
429 data->mgmt_group_cipher = 0;
430#endif /* CONFIG_IEEE80211W */
431
432 if (rsn_ie_len == 0) {
433 /* No RSN IE - fail silently */
434 return -1;
435 }
436
437 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
438 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
439 __func__, (unsigned long) rsn_ie_len);
440 return -1;
441 }
442
443 hdr = (const struct rsn_ie_hdr *) rsn_ie;
444
445 if (hdr->elem_id != WLAN_EID_RSN ||
446 hdr->len != rsn_ie_len - 2 ||
447 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
448 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
449 __func__);
450 return -2;
451 }
452
453 pos = (const u8 *) (hdr + 1);
454 left = rsn_ie_len - sizeof(*hdr);
455
456 if (left >= RSN_SELECTOR_LEN) {
457 data->group_cipher = rsn_selector_to_bitfield(pos);
458#ifdef CONFIG_IEEE80211W
459 if (data->group_cipher == WPA_CIPHER_AES_128_CMAC) {
460 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as group "
461 "cipher", __func__);
462 return -1;
463 }
464#endif /* CONFIG_IEEE80211W */
465 pos += RSN_SELECTOR_LEN;
466 left -= RSN_SELECTOR_LEN;
467 } else if (left > 0) {
468 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
469 __func__, left);
470 return -3;
471 }
472
473 if (left >= 2) {
474 data->pairwise_cipher = 0;
475 count = WPA_GET_LE16(pos);
476 pos += 2;
477 left -= 2;
478 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
479 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
480 "count %u left %u", __func__, count, left);
481 return -4;
482 }
483 for (i = 0; i < count; i++) {
484 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
485 pos += RSN_SELECTOR_LEN;
486 left -= RSN_SELECTOR_LEN;
487 }
488#ifdef CONFIG_IEEE80211W
489 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
490 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
491 "pairwise cipher", __func__);
492 return -1;
493 }
494#endif /* CONFIG_IEEE80211W */
495 } else if (left == 1) {
496 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
497 __func__);
498 return -5;
499 }
500
501 if (left >= 2) {
502 data->key_mgmt = 0;
503 count = WPA_GET_LE16(pos);
504 pos += 2;
505 left -= 2;
506 if (count == 0 || left < count * RSN_SELECTOR_LEN) {
507 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
508 "count %u left %u", __func__, count, left);
509 return -6;
510 }
511 for (i = 0; i < count; i++) {
512 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
513 pos += RSN_SELECTOR_LEN;
514 left -= RSN_SELECTOR_LEN;
515 }
516 } else if (left == 1) {
517 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
518 __func__);
519 return -7;
520 }
521
522 if (left >= 2) {
523 data->capabilities = WPA_GET_LE16(pos);
524 pos += 2;
525 left -= 2;
526 }
527
528 if (left >= 2) {
529 data->num_pmkid = WPA_GET_LE16(pos);
530 pos += 2;
531 left -= 2;
532 if (left < (int) data->num_pmkid * PMKID_LEN) {
533 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
534 "(num_pmkid=%lu left=%d)",
535 __func__, (unsigned long) data->num_pmkid,
536 left);
537 data->num_pmkid = 0;
538 return -9;
539 } else {
540 data->pmkid = pos;
541 pos += data->num_pmkid * PMKID_LEN;
542 left -= data->num_pmkid * PMKID_LEN;
543 }
544 }
545
546#ifdef CONFIG_IEEE80211W
547 if (left >= 4) {
548 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
549 if (data->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) {
550 wpa_printf(MSG_DEBUG, "%s: Unsupported management "
551 "group cipher 0x%x", __func__,
552 data->mgmt_group_cipher);
553 return -10;
554 }
555 pos += RSN_SELECTOR_LEN;
556 left -= RSN_SELECTOR_LEN;
557 }
558#endif /* CONFIG_IEEE80211W */
559
560 if (left > 0) {
749fa140
JM		 561 wpa_hexdump(MSG_DEBUG,
562 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
563 pos, left);
6fc6879b
JM		 564 }
565
566 return 0;
6fc6879b
JM		 567}
568
569
f3b87561
JM		 570static int wpa_selector_to_bitfield(const u8 *s)
571{
572 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
573 return WPA_CIPHER_NONE;
574 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
575 return WPA_CIPHER_WEP40;
576 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
577 return WPA_CIPHER_TKIP;
578 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
579 return WPA_CIPHER_CCMP;
580 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
581 return WPA_CIPHER_WEP104;
582 return 0;
583}
584
585
586static int wpa_key_mgmt_to_bitfield(const u8 *s)
587{
588 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
589 return WPA_KEY_MGMT_IEEE8021X;
590 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
591 return WPA_KEY_MGMT_PSK;
592 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
593 return WPA_KEY_MGMT_WPA_NONE;
594 return 0;
595}
596
597
598int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
599 struct wpa_ie_data *data)
600{
601 const struct wpa_ie_hdr *hdr;
602 const u8 *pos;
603 int left;
604 int i, count;
605
606 os_memset(data, 0, sizeof(*data));
607 data->proto = WPA_PROTO_WPA;
608 data->pairwise_cipher = WPA_CIPHER_TKIP;
609 data->group_cipher = WPA_CIPHER_TKIP;
610 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
611 data->capabilities = 0;
612 data->pmkid = NULL;
613 data->num_pmkid = 0;
614 data->mgmt_group_cipher = 0;
615
616 if (wpa_ie_len == 0) {
617 /* No WPA IE - fail silently */
618 return -1;
619 }
620
621 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
622 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
623 __func__, (unsigned long) wpa_ie_len);
624 return -1;
625 }
626
627 hdr = (const struct wpa_ie_hdr *) wpa_ie;
628
629 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
630 hdr->len != wpa_ie_len - 2 ||
631 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
632 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
633 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
634 __func__);
635 return -2;
636 }
637
638 pos = (const u8 *) (hdr + 1);
639 left = wpa_ie_len - sizeof(*hdr);
640
641 if (left >= WPA_SELECTOR_LEN) {
642 data->group_cipher = wpa_selector_to_bitfield(pos);
643 pos += WPA_SELECTOR_LEN;
644 left -= WPA_SELECTOR_LEN;
645 } else if (left > 0) {
646 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
647 __func__, left);
648 return -3;
649 }
650
651 if (left >= 2) {
652 data->pairwise_cipher = 0;
653 count = WPA_GET_LE16(pos);
654 pos += 2;
655 left -= 2;
656 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
657 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
658 "count %u left %u", __func__, count, left);
659 return -4;
660 }
661 for (i = 0; i < count; i++) {
662 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
663 pos += WPA_SELECTOR_LEN;
664 left -= WPA_SELECTOR_LEN;
665 }
666 } else if (left == 1) {
667 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
668 __func__);
669 return -5;
670 }
671
672 if (left >= 2) {
673 data->key_mgmt = 0;
674 count = WPA_GET_LE16(pos);
675 pos += 2;
676 left -= 2;
677 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
678 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
679 "count %u left %u", __func__, count, left);
680 return -6;
681 }
682 for (i = 0; i < count; i++) {
683 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
684 pos += WPA_SELECTOR_LEN;
685 left -= WPA_SELECTOR_LEN;
686 }
687 } else if (left == 1) {
688 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
689 __func__);
690 return -7;
691 }
692
693 if (left >= 2) {
694 data->capabilities = WPA_GET_LE16(pos);
695 pos += 2;
696 left -= 2;
697 }
698
699 if (left > 0) {
749fa140
JM		 700 wpa_hexdump(MSG_DEBUG,
701 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
702 pos, left);
f3b87561
JM		 703 }
704
705 return 0;
706}
707
708
6fc6879b
JM		 709#ifdef CONFIG_IEEE80211R
710
711/**
712 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
713 *
c1e033b0 714 * IEEE Std 802.11r-2008 - 8.5.1.5.3
6fc6879b
JM		 715 */
716void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
717 const u8 *ssid, size_t ssid_len,
718 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
719 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
720{
721 u8 buf[1 + WPA_MAX_SSID_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
722 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
723 u8 *pos, r0_key_data[48], hash[32];
724 const u8 *addr[2];
725 size_t len[2];
726
727 /*
728 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
729 * SSIDlength || SSID || MDID || R0KHlength ||
730 * R0KH-ID || S0KH-ID)
731 * XXKey is either the second 256 bits of MSK or PSK.
732 * PMK-R0 = L(R0-Key-Data, 0, 256)
733 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
734 */
735 if (ssid_len > WPA_MAX_SSID_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
736 return;
737 pos = buf;
738 *pos++ = ssid_len;
739 os_memcpy(pos, ssid, ssid_len);
740 pos += ssid_len;
741 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
742 pos += MOBILITY_DOMAIN_ID_LEN;
743 *pos++ = r0kh_id_len;
744 os_memcpy(pos, r0kh_id, r0kh_id_len);
745 pos += r0kh_id_len;
746 os_memcpy(pos, s0kh_id, ETH_ALEN);
747 pos += ETH_ALEN;
748
749 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
750 r0_key_data, sizeof(r0_key_data));
751 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
752
753 /*
754 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
755 */
756 addr[0] = (const u8 *) "FT-R0N";
757 len[0] = 6;
758 addr[1] = r0_key_data + PMK_LEN;
759 len[1] = 16;
760
761 sha256_vector(2, addr, len, hash);
762 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
763}
764
765
766/**
767 * wpa_derive_pmk_r1_name - Derive PMKR1Name
768 *
c1e033b0 769 * IEEE Std 802.11r-2008 - 8.5.1.5.4
6fc6879b
JM		 770 */
771void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
772 const u8 *s1kh_id, u8 *pmk_r1_name)
773{
774 u8 hash[32];
775 const u8 *addr[4];
776 size_t len[4];
777
778 /*
779 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
780 * R1KH-ID || S1KH-ID))
781 */
782 addr[0] = (const u8 *) "FT-R1N";
783 len[0] = 6;
784 addr[1] = pmk_r0_name;
785 len[1] = WPA_PMK_NAME_LEN;
786 addr[2] = r1kh_id;
787 len[2] = FT_R1KH_ID_LEN;
788 addr[3] = s1kh_id;
789 len[3] = ETH_ALEN;
790
791 sha256_vector(4, addr, len, hash);
792 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
793}
794
795
796/**
797 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
798 *
c1e033b0 799 * IEEE Std 802.11r-2008 - 8.5.1.5.4
6fc6879b
JM		 800 */
801void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
802 const u8 *r1kh_id, const u8 *s1kh_id,
803 u8 *pmk_r1, u8 *pmk_r1_name)
804{
805 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
806 u8 *pos;
807
808 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
809 pos = buf;
810 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
811 pos += FT_R1KH_ID_LEN;
812 os_memcpy(pos, s1kh_id, ETH_ALEN);
813 pos += ETH_ALEN;
814
815 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
816
817 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
818}
819
820
821/**
822 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
823 *
c1e033b0 824 * IEEE Std 802.11r-2008 - 8.5.1.5.5
6fc6879b
JM		 825 */
826void wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
827 const u8 *sta_addr, const u8 *bssid,
828 const u8 *pmk_r1_name,
829 u8 *ptk, size_t ptk_len, u8 *ptk_name)
830{
831 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
832 u8 *pos, hash[32];
833 const u8 *addr[6];
834 size_t len[6];
835
836 /*
837 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
838 * BSSID || STA-ADDR)
839 */
840 pos = buf;
841 os_memcpy(pos, snonce, WPA_NONCE_LEN);
842 pos += WPA_NONCE_LEN;
843 os_memcpy(pos, anonce, WPA_NONCE_LEN);
844 pos += WPA_NONCE_LEN;
845 os_memcpy(pos, bssid, ETH_ALEN);
846 pos += ETH_ALEN;
847 os_memcpy(pos, sta_addr, ETH_ALEN);
848 pos += ETH_ALEN;
849
850 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, ptk, ptk_len);
851
852 /*
853 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
854 * ANonce || BSSID || STA-ADDR))
855 */
856 addr[0] = pmk_r1_name;
857 len[0] = WPA_PMK_NAME_LEN;
858 addr[1] = (const u8 *) "FT-PTKN";
859 len[1] = 7;
860 addr[2] = snonce;
861 len[2] = WPA_NONCE_LEN;
862 addr[3] = anonce;
863 len[3] = WPA_NONCE_LEN;
864 addr[4] = bssid;
865 len[4] = ETH_ALEN;
866 addr[5] = sta_addr;
867 len[5] = ETH_ALEN;
868
869 sha256_vector(6, addr, len, hash);
870 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
871}
872
873#endif /* CONFIG_IEEE80211R */
13268290
JM		 874
875
876/**
877 * rsn_pmkid - Calculate PMK identifier
878 * @pmk: Pairwise master key
879 * @pmk_len: Length of pmk in bytes
880 * @aa: Authenticator address
881 * @spa: Supplicant address
882 * @pmkid: Buffer for PMKID
883 * @use_sha256: Whether to use SHA256-based KDF
884 *
885 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
886 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
887 */
888void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
889 u8 *pmkid, int use_sha256)
890{
891 char *title = "PMK Name";
892 const u8 *addr[3];
893 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
894 unsigned char hash[SHA256_MAC_LEN];
895
896 addr[0] = (u8 *) title;
897 addr[1] = aa;
898 addr[2] = spa;
899
900#ifdef CONFIG_IEEE80211W
901 if (use_sha256)
902 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
903 else
904#endif /* CONFIG_IEEE80211W */
905 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
906 os_memcpy(pmkid, hash, PMKID_LEN);
907}
43fb5297
JM		 908
909
910/**
911 * wpa_cipher_txt - Convert cipher suite to a text string
912 * @cipher: Cipher suite (WPA_CIPHER_* enum)
913 * Returns: Pointer to a text string of the cipher suite name
914 */
915const char * wpa_cipher_txt(int cipher)
916{
917 switch (cipher) {
918 case WPA_CIPHER_NONE:
919 return "NONE";
920 case WPA_CIPHER_WEP40:
921 return "WEP-40";
922 case WPA_CIPHER_WEP104:
923 return "WEP-104";
924 case WPA_CIPHER_TKIP:
925 return "TKIP";
926 case WPA_CIPHER_CCMP:
927 return "CCMP";
928 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
929 return "CCMP+TKIP";
eb7719ff
JM		 930 case WPA_CIPHER_GCMP:
931 return "GCMP";
30675c34
JM		 932 case WPA_CIPHER_GCMP_256:
933 return "GCMP-256";
934 case WPA_CIPHER_CCMP_256:
935 return "CCMP-256";
dff1e285
JM		 936 case WPA_CIPHER_GTK_NOT_USED:
937 return "GTK_NOT_USED";
43fb5297
JM		 938 default:
939 return "UNKNOWN";
940 }
941}
942
943
944/**
945 * wpa_key_mgmt_txt - Convert key management suite to a text string
946 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
947 * @proto: WPA/WPA2 version (WPA_PROTO_*)
948 * Returns: Pointer to a text string of the key management suite name
949 */
950const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
951{
952 switch (key_mgmt) {
953 case WPA_KEY_MGMT_IEEE8021X:
954 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
955 return "WPA2+WPA/IEEE 802.1X/EAP";
956 return proto == WPA_PROTO_RSN ?
957 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
958 case WPA_KEY_MGMT_PSK:
959 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
960 return "WPA2-PSK+WPA-PSK";
961 return proto == WPA_PROTO_RSN ?
962 "WPA2-PSK" : "WPA-PSK";
963 case WPA_KEY_MGMT_NONE:
964 return "NONE";
965 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
966 return "IEEE 802.1X (no WPA)";
967#ifdef CONFIG_IEEE80211R
968 case WPA_KEY_MGMT_FT_IEEE8021X:
969 return "FT-EAP";
970 case WPA_KEY_MGMT_FT_PSK:
971 return "FT-PSK";
972#endif /* CONFIG_IEEE80211R */
973#ifdef CONFIG_IEEE80211W
974 case WPA_KEY_MGMT_IEEE8021X_SHA256:
975 return "WPA2-EAP-SHA256";
976 case WPA_KEY_MGMT_PSK_SHA256:
977 return "WPA2-PSK-SHA256";
978#endif /* CONFIG_IEEE80211W */
979 default:
980 return "UNKNOWN";
981 }
982}
26e23750
JM		 983
984
985int wpa_compare_rsn_ie(int ft_initial_assoc,
986 const u8 *ie1, size_t ie1len,
987 const u8 *ie2, size_t ie2len)
988{
d3ccead3
JM		 989 if (ie1 == NULL || ie2 == NULL)
990 return -1;
991
26e23750
JM		 992 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
993 return 0; /* identical IEs */
994
995#ifdef CONFIG_IEEE80211R
996 if (ft_initial_assoc) {
997 struct wpa_ie_data ie1d, ie2d;
998 /*
999 * The PMKID-List in RSN IE is different between Beacon/Probe
1000 * Response/(Re)Association Request frames and EAPOL-Key
1001 * messages in FT initial mobility domain association. Allow
1002 * for this, but verify that other parts of the RSN IEs are
1003 * identical.
1004 */
1005 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
1006 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
1007 return -1;
1008 if (ie1d.proto == ie2d.proto &&
1009 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
1010 ie1d.group_cipher == ie2d.group_cipher &&
1011 ie1d.key_mgmt == ie2d.key_mgmt &&
1012 ie1d.capabilities == ie2d.capabilities &&
1013 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
1014 return 0;
1015 }
1016#endif /* CONFIG_IEEE80211R */
1017
1018 return -1;
1019}
1020
1021
1022#ifdef CONFIG_IEEE80211R
1023int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
1024{
1025 u8 *start, *end, *rpos, *rend;
1026 int added = 0;
1027
1028 start = ies;
1029 end = ies + ies_len;
1030
1031 while (start < end) {
1032 if (*start == WLAN_EID_RSN)
1033 break;
1034 start += 2 + start[1];
1035 }
1036 if (start >= end) {
1037 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1038 "IEs data");
1039 return -1;
1040 }
1041 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1042 start, 2 + start[1]);
1043
1044 /* Find start of PMKID-Count */
1045 rpos = start + 2;
1046 rend = rpos + start[1];
1047
1048 /* Skip Version and Group Data Cipher Suite */
1049 rpos += 2 + 4;
1050 /* Skip Pairwise Cipher Suite Count and List */
1051 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1052 /* Skip AKM Suite Count and List */
1053 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1054
1055 if (rpos == rend) {
1056 /* Add RSN Capabilities */
1057 os_memmove(rpos + 2, rpos, end - rpos);
1058 *rpos++ = 0;
1059 *rpos++ = 0;
1060 } else {
1061 /* Skip RSN Capabilities */
1062 rpos += 2;
1063 if (rpos > rend) {
1064 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1065 "IEs data");
1066 return -1;
1067 }
1068 }
1069
1070 if (rpos == rend) {
1071 /* No PMKID-Count field included; add it */
1072 os_memmove(rpos + 2 + PMKID_LEN, rpos, end - rpos);
1073 WPA_PUT_LE16(rpos, 1);
1074 rpos += 2;
1075 os_memcpy(rpos, pmkid, PMKID_LEN);
1076 added += 2 + PMKID_LEN;
1077 start[1] += 2 + PMKID_LEN;
1078 } else {
1079 /* PMKID-Count was included; use it */
1080 if (WPA_GET_LE16(rpos) != 0) {
1081 wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
1082 "in RSN IE in EAPOL-Key data");
1083 return -1;
1084 }
1085 WPA_PUT_LE16(rpos, 1);
1086 rpos += 2;
1087 os_memmove(rpos + PMKID_LEN, rpos, end - rpos);
1088 os_memcpy(rpos, pmkid, PMKID_LEN);
1089 added += PMKID_LEN;
1090 start[1] += PMKID_LEN;
1091 }
1092
1093 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1094 "(PMKID inserted)", start, 2 + start[1]);
1095
1096 return added;
1097}
1098#endif /* CONFIG_IEEE80211R */
c3550295
JM		 1099
1100
1101int wpa_cipher_key_len(int cipher)
1102{
1103 switch (cipher) {
30675c34
JM		 1104 case WPA_CIPHER_CCMP_256:
1105 case WPA_CIPHER_GCMP_256:
1106 return 32;
c3550295
JM		 1107 case WPA_CIPHER_CCMP:
1108 case WPA_CIPHER_GCMP:
1109 return 16;
1110 case WPA_CIPHER_TKIP:
1111 return 32;
1112 case WPA_CIPHER_WEP104:
1113 return 13;
1114 case WPA_CIPHER_WEP40:
1115 return 5;
1116 }
1117
1118 return 0;
1119}
1120
1121
1122int wpa_cipher_rsc_len(int cipher)
1123{
1124 switch (cipher) {
30675c34
JM		 1125 case WPA_CIPHER_CCMP_256:
1126 case WPA_CIPHER_GCMP_256:
c3550295
JM		 1127 case WPA_CIPHER_CCMP:
1128 case WPA_CIPHER_GCMP:
1129 case WPA_CIPHER_TKIP:
1130 return 6;
1131 case WPA_CIPHER_WEP104:
1132 case WPA_CIPHER_WEP40:
1133 return 0;
1134 }
1135
1136 return 0;
1137}
1138
1139
1140int wpa_cipher_to_alg(int cipher)
1141{
1142 switch (cipher) {
30675c34
JM		 1143 case WPA_CIPHER_CCMP_256:
1144 return WPA_ALG_CCMP_256;
1145 case WPA_CIPHER_GCMP_256:
1146 return WPA_ALG_GCMP_256;
c3550295
JM		 1147 case WPA_CIPHER_CCMP:
1148 return WPA_ALG_CCMP;
1149 case WPA_CIPHER_GCMP:
1150 return WPA_ALG_GCMP;
1151 case WPA_CIPHER_TKIP:
1152 return WPA_ALG_TKIP;
1153 case WPA_CIPHER_WEP104:
1154 case WPA_CIPHER_WEP40:
1155 return WPA_ALG_WEP;
1156 }
1157 return WPA_ALG_NONE;
1158}
1159
1160
1161int wpa_cipher_valid_pairwise(int cipher)
1162{
30675c34
JM		 1163 return cipher == WPA_CIPHER_CCMP_256 ||
1164 cipher == WPA_CIPHER_GCMP_256 ||
1165 cipher == WPA_CIPHER_CCMP ||
c3550295
JM		 1166 cipher == WPA_CIPHER_GCMP ||
1167 cipher == WPA_CIPHER_TKIP;
1168}
1169
1170
1171u32 wpa_cipher_to_suite(int proto, int cipher)
1172{
30675c34
JM		 1173 if (cipher & WPA_CIPHER_CCMP_256)
1174 return RSN_CIPHER_SUITE_CCMP_256;
1175 if (cipher & WPA_CIPHER_GCMP_256)
1176 return RSN_CIPHER_SUITE_GCMP_256;
c3550295
JM		 1177 if (cipher & WPA_CIPHER_CCMP)
1178 return (proto == WPA_PROTO_RSN ?
1179 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1180 if (cipher & WPA_CIPHER_GCMP)
1181 return RSN_CIPHER_SUITE_GCMP;
1182 if (cipher & WPA_CIPHER_TKIP)
1183 return (proto == WPA_PROTO_RSN ?
1184 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1185 if (cipher & WPA_CIPHER_WEP104)
1186 return (proto == WPA_PROTO_RSN ?
1187 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1188 if (cipher & WPA_CIPHER_WEP40)
1189 return (proto == WPA_PROTO_RSN ?
1190 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1191 if (cipher & WPA_CIPHER_NONE)
1192 return (proto == WPA_PROTO_RSN ?
1193 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
dff1e285
JM		 1194 if (cipher & WPA_CIPHER_GTK_NOT_USED)
1195 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
c3550295
JM		 1196 return 0;
1197}
1198
1199
8a4ce280 1200int rsn_cipher_put_suites(u8 *start, int ciphers)
c3550295 1201{
8a4ce280 1202 u8 *pos = start;
c3550295 1203
30675c34
JM		 1204 if (ciphers & WPA_CIPHER_CCMP_256) {
1205 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
1206 pos += RSN_SELECTOR_LEN;
30675c34
JM		 1207 }
1208 if (ciphers & WPA_CIPHER_GCMP_256) {
1209 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
1210 pos += RSN_SELECTOR_LEN;
30675c34 1211 }
c3550295
JM		 1212 if (ciphers & WPA_CIPHER_CCMP) {
1213 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1214 pos += RSN_SELECTOR_LEN;
c3550295
JM		 1215 }
1216 if (ciphers & WPA_CIPHER_GCMP) {
1217 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1218 pos += RSN_SELECTOR_LEN;
c3550295
JM		 1219 }
1220 if (ciphers & WPA_CIPHER_TKIP) {
1221 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1222 pos += RSN_SELECTOR_LEN;
c3550295
JM		 1223 }
1224 if (ciphers & WPA_CIPHER_NONE) {
1225 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1226 pos += RSN_SELECTOR_LEN;
c3550295
JM		 1227 }
1228
8a4ce280 1229 return (pos - start) / RSN_SELECTOR_LEN;
c3550295
JM		 1230}
1231
1232
8a4ce280 1233int wpa_cipher_put_suites(u8 *start, int ciphers)
c3550295 1234{
8a4ce280 1235 u8 *pos = start;
c3550295
JM		 1236
1237 if (ciphers & WPA_CIPHER_CCMP) {
1238 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1239 pos += WPA_SELECTOR_LEN;
c3550295
JM		 1240 }
1241 if (ciphers & WPA_CIPHER_TKIP) {
1242 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1243 pos += WPA_SELECTOR_LEN;
c3550295
JM		 1244 }
1245 if (ciphers & WPA_CIPHER_NONE) {
1246 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1247 pos += WPA_SELECTOR_LEN;
c3550295
JM		 1248 }
1249
8a4ce280 1250 return (pos - start) / RSN_SELECTOR_LEN;
c3550295 1251}
edbd2a19
JM		 1252
1253
1254int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1255{
30675c34
JM		 1256 if (ciphers & WPA_CIPHER_CCMP_256)
1257 return WPA_CIPHER_CCMP_256;
1258 if (ciphers & WPA_CIPHER_GCMP_256)
1259 return WPA_CIPHER_GCMP_256;
edbd2a19
JM		 1260 if (ciphers & WPA_CIPHER_CCMP)
1261 return WPA_CIPHER_CCMP;
1262 if (ciphers & WPA_CIPHER_GCMP)
1263 return WPA_CIPHER_GCMP;
1264 if (ciphers & WPA_CIPHER_TKIP)
1265 return WPA_CIPHER_TKIP;
1266 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1267 return WPA_CIPHER_NONE;
1268 return -1;
1269}
1270
1271
1272int wpa_pick_group_cipher(int ciphers)
1273{
30675c34
JM		 1274 if (ciphers & WPA_CIPHER_CCMP_256)
1275 return WPA_CIPHER_CCMP_256;
1276 if (ciphers & WPA_CIPHER_GCMP_256)
1277 return WPA_CIPHER_GCMP_256;
edbd2a19
JM		 1278 if (ciphers & WPA_CIPHER_CCMP)
1279 return WPA_CIPHER_CCMP;
1280 if (ciphers & WPA_CIPHER_GCMP)
1281 return WPA_CIPHER_GCMP;
dff1e285
JM		 1282 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
1283 return WPA_CIPHER_GTK_NOT_USED;
edbd2a19
JM		 1284 if (ciphers & WPA_CIPHER_TKIP)
1285 return WPA_CIPHER_TKIP;
1286 if (ciphers & WPA_CIPHER_WEP104)
1287 return WPA_CIPHER_WEP104;
1288 if (ciphers & WPA_CIPHER_WEP40)
1289 return WPA_CIPHER_WEP40;
1290 return -1;
1291}
a39c78be
JM		 1292
1293
1294int wpa_parse_cipher(const char *value)
1295{
1296 int val = 0, last;
1297 char *start, *end, *buf;
1298
1299 buf = os_strdup(value);
1300 if (buf == NULL)
1301 return -1;
1302 start = buf;
1303
1304 while (*start != '\0') {
1305 while (*start == ' ' || *start == '\t')
1306 start++;
1307 if (*start == '\0')
1308 break;
1309 end = start;
1310 while (*end != ' ' && *end != '\t' && *end != '\0')
1311 end++;
1312 last = *end == '\0';
1313 *end = '\0';
30675c34
JM		 1314 if (os_strcmp(start, "CCMP-256") == 0)
1315 val |= WPA_CIPHER_CCMP_256;
1316 else if (os_strcmp(start, "GCMP-256") == 0)
1317 val |= WPA_CIPHER_GCMP_256;
1318 else if (os_strcmp(start, "CCMP") == 0)
a39c78be
JM		 1319 val |= WPA_CIPHER_CCMP;
1320 else if (os_strcmp(start, "GCMP") == 0)
1321 val |= WPA_CIPHER_GCMP;
1322 else if (os_strcmp(start, "TKIP") == 0)
1323 val |= WPA_CIPHER_TKIP;
1324 else if (os_strcmp(start, "WEP104") == 0)
1325 val |= WPA_CIPHER_WEP104;
1326 else if (os_strcmp(start, "WEP40") == 0)
1327 val |= WPA_CIPHER_WEP40;
1328 else if (os_strcmp(start, "NONE") == 0)
1329 val |= WPA_CIPHER_NONE;
dff1e285
JM		 1330 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
1331 val |= WPA_CIPHER_GTK_NOT_USED;
a39c78be
JM		 1332 else {
1333 os_free(buf);
1334 return -1;
1335 }
1336
1337 if (last)
1338 break;
1339 start = end + 1;
1340 }
1341 os_free(buf);
1342
1343 return val;
1344}
0282a8c4
JM		 1345
1346
1347int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
1348{
1349 char *pos = start;
1350 int ret;
1351
30675c34
JM		 1352 if (ciphers & WPA_CIPHER_CCMP_256) {
1353 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
1354 pos == start ? "" : delim);
1355 if (ret < 0 || ret >= end - pos)
1356 return -1;
1357 pos += ret;
1358 }
1359 if (ciphers & WPA_CIPHER_GCMP_256) {
1360 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
1361 pos == start ? "" : delim);
1362 if (ret < 0 || ret >= end - pos)
1363 return -1;
1364 pos += ret;
1365 }
0282a8c4
JM		 1366 if (ciphers & WPA_CIPHER_CCMP) {
1367 ret = os_snprintf(pos, end - pos, "%sCCMP",
1368 pos == start ? "" : delim);
1369 if (ret < 0 || ret >= end - pos)
1370 return -1;
1371 pos += ret;
1372 }
1373 if (ciphers & WPA_CIPHER_GCMP) {
1374 ret = os_snprintf(pos, end - pos, "%sGCMP",
1375 pos == start ? "" : delim);
1376 if (ret < 0 || ret >= end - pos)
1377 return -1;
1378 pos += ret;
1379 }
1380 if (ciphers & WPA_CIPHER_TKIP) {
1381 ret = os_snprintf(pos, end - pos, "%sTKIP",
1382 pos == start ? "" : delim);
1383 if (ret < 0 || ret >= end - pos)
1384 return -1;
1385 pos += ret;
1386 }
1387 if (ciphers & WPA_CIPHER_WEP104) {
1388 ret = os_snprintf(pos, end - pos, "%sWEP104",
1389 pos == start ? "" : delim);
1390 if (ret < 0 || ret >= end - pos)
1391 return -1;
1392 pos += ret;
1393 }
1394 if (ciphers & WPA_CIPHER_WEP40) {
1395 ret = os_snprintf(pos, end - pos, "%sWEP40",
1396 pos == start ? "" : delim);
1397 if (ret < 0 || ret >= end - pos)
1398 return -1;
1399 pos += ret;
1400 }
1401 if (ciphers & WPA_CIPHER_NONE) {
1402 ret = os_snprintf(pos, end - pos, "%sNONE",
1403 pos == start ? "" : delim);
1404 if (ret < 0 || ret >= end - pos)
1405 return -1;
1406 pos += ret;
1407 }
1408
1409 return pos - start;
1410}
cf830c1c
JM		 1411
1412
1413int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
1414{
1415 int pairwise = 0;
1416
1417 /* Select group cipher based on the enabled pairwise cipher suites */
1418 if (wpa & 1)
1419 pairwise |= wpa_pairwise;
1420 if (wpa & 2)
1421 pairwise |= rsn_pairwise;
1422
1423 if (pairwise & WPA_CIPHER_TKIP)
1424 return WPA_CIPHER_TKIP;
1425 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
1426 return WPA_CIPHER_GCMP;
30675c34
JM		 1427 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
1428 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
1429 return WPA_CIPHER_GCMP_256;
1430 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
1431 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
1432 return WPA_CIPHER_CCMP_256;
cf830c1c
JM		 1433 return WPA_CIPHER_CCMP;
1434}
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