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Share common SAE and EAP-pwd functionality: own scalar generation
[thirdparty/hostap.git] / src / common / wpa_common.c
1 /*
2 * WPA/RSN - Shared functions for supplicant and authenticator
3 * Copyright (c) 2002-2018, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "crypto/md5.h"
13 #include "crypto/sha1.h"
14 #include "crypto/sha256.h"
15 #include "crypto/sha384.h"
16 #include "crypto/sha512.h"
17 #include "crypto/aes_wrap.h"
18 #include "crypto/crypto.h"
19 #include "ieee802_11_defs.h"
20 #include "defs.h"
21 #include "wpa_common.h"
22
23
24 static unsigned int wpa_kck_len(int akmp, size_t pmk_len)
25 {
26 switch (akmp) {
27 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
28 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
29 return 24;
30 case WPA_KEY_MGMT_FILS_SHA256:
31 case WPA_KEY_MGMT_FT_FILS_SHA256:
32 case WPA_KEY_MGMT_FILS_SHA384:
33 case WPA_KEY_MGMT_FT_FILS_SHA384:
34 return 0;
35 case WPA_KEY_MGMT_DPP:
36 return pmk_len / 2;
37 case WPA_KEY_MGMT_OWE:
38 return pmk_len / 2;
39 default:
40 return 16;
41 }
42 }
43
44
45 #ifdef CONFIG_IEEE80211R
46 static unsigned int wpa_kck2_len(int akmp)
47 {
48 switch (akmp) {
49 case WPA_KEY_MGMT_FT_FILS_SHA256:
50 return 16;
51 case WPA_KEY_MGMT_FT_FILS_SHA384:
52 return 24;
53 default:
54 return 0;
55 }
56 }
57 #endif /* CONFIG_IEEE80211R */
58
59
60 static unsigned int wpa_kek_len(int akmp, size_t pmk_len)
61 {
62 switch (akmp) {
63 case WPA_KEY_MGMT_FILS_SHA384:
64 case WPA_KEY_MGMT_FT_FILS_SHA384:
65 return 64;
66 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
67 case WPA_KEY_MGMT_FILS_SHA256:
68 case WPA_KEY_MGMT_FT_FILS_SHA256:
69 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
70 return 32;
71 case WPA_KEY_MGMT_DPP:
72 return pmk_len <= 32 ? 16 : 32;
73 case WPA_KEY_MGMT_OWE:
74 return pmk_len <= 32 ? 16 : 32;
75 default:
76 return 16;
77 }
78 }
79
80
81 #ifdef CONFIG_IEEE80211R
82 static unsigned int wpa_kek2_len(int akmp)
83 {
84 switch (akmp) {
85 case WPA_KEY_MGMT_FT_FILS_SHA256:
86 return 16;
87 case WPA_KEY_MGMT_FT_FILS_SHA384:
88 return 32;
89 default:
90 return 0;
91 }
92 }
93 #endif /* CONFIG_IEEE80211R */
94
95
96 unsigned int wpa_mic_len(int akmp, size_t pmk_len)
97 {
98 switch (akmp) {
99 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
100 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
101 return 24;
102 case WPA_KEY_MGMT_FILS_SHA256:
103 case WPA_KEY_MGMT_FILS_SHA384:
104 case WPA_KEY_MGMT_FT_FILS_SHA256:
105 case WPA_KEY_MGMT_FT_FILS_SHA384:
106 return 0;
107 case WPA_KEY_MGMT_DPP:
108 return pmk_len / 2;
109 case WPA_KEY_MGMT_OWE:
110 return pmk_len / 2;
111 default:
112 return 16;
113 }
114 }
115
116
117 /**
118 * wpa_use_akm_defined - Is AKM-defined Key Descriptor Version used
119 * @akmp: WPA_KEY_MGMT_* used in key derivation
120 * Returns: 1 if AKM-defined Key Descriptor Version is used; 0 otherwise
121 */
122 int wpa_use_akm_defined(int akmp)
123 {
124 return akmp == WPA_KEY_MGMT_OSEN ||
125 akmp == WPA_KEY_MGMT_OWE ||
126 akmp == WPA_KEY_MGMT_DPP ||
127 akmp == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 ||
128 wpa_key_mgmt_sae(akmp) ||
129 wpa_key_mgmt_suite_b(akmp) ||
130 wpa_key_mgmt_fils(akmp);
131 }
132
133
134 /**
135 * wpa_use_cmac - Is CMAC integrity algorithm used for EAPOL-Key MIC
136 * @akmp: WPA_KEY_MGMT_* used in key derivation
137 * Returns: 1 if CMAC is used; 0 otherwise
138 */
139 int wpa_use_cmac(int akmp)
140 {
141 return akmp == WPA_KEY_MGMT_OSEN ||
142 akmp == WPA_KEY_MGMT_OWE ||
143 akmp == WPA_KEY_MGMT_DPP ||
144 wpa_key_mgmt_ft(akmp) ||
145 wpa_key_mgmt_sha256(akmp) ||
146 wpa_key_mgmt_sae(akmp) ||
147 wpa_key_mgmt_suite_b(akmp);
148 }
149
150
151 /**
152 * wpa_use_aes_key_wrap - Is AES Keywrap algorithm used for EAPOL-Key Key Data
153 * @akmp: WPA_KEY_MGMT_* used in key derivation
154 * Returns: 1 if AES Keywrap is used; 0 otherwise
155 *
156 * Note: AKM 00-0F-AC:1 and 00-0F-AC:2 have special rules for selecting whether
157 * to use AES Keywrap based on the negotiated pairwise cipher. This function
158 * does not cover those special cases.
159 */
160 int wpa_use_aes_key_wrap(int akmp)
161 {
162 return akmp == WPA_KEY_MGMT_OSEN ||
163 akmp == WPA_KEY_MGMT_OWE ||
164 akmp == WPA_KEY_MGMT_DPP ||
165 wpa_key_mgmt_ft(akmp) ||
166 wpa_key_mgmt_sha256(akmp) ||
167 wpa_key_mgmt_sae(akmp) ||
168 wpa_key_mgmt_suite_b(akmp);
169 }
170
171
172 /**
173 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
174 * @key: EAPOL-Key Key Confirmation Key (KCK)
175 * @key_len: KCK length in octets
176 * @akmp: WPA_KEY_MGMT_* used in key derivation
177 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
178 * @buf: Pointer to the beginning of the EAPOL header (version field)
179 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
180 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
181 * Returns: 0 on success, -1 on failure
182 *
183 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
184 * to be cleared (all zeroes) when calling this function.
185 *
186 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
187 * description of the Key MIC calculation. It includes packet data from the
188 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
189 * happened during final editing of the standard and the correct behavior is
190 * defined in the last draft (IEEE 802.11i/D10).
191 */
192 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
193 const u8 *buf, size_t len, u8 *mic)
194 {
195 u8 hash[SHA512_MAC_LEN];
196
197 if (key_len == 0) {
198 wpa_printf(MSG_DEBUG,
199 "WPA: KCK not set - cannot calculate MIC");
200 return -1;
201 }
202
203 switch (ver) {
204 #ifndef CONFIG_FIPS
205 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
206 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-MD5");
207 return hmac_md5(key, key_len, buf, len, mic);
208 #endif /* CONFIG_FIPS */
209 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
210 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA1");
211 if (hmac_sha1(key, key_len, buf, len, hash))
212 return -1;
213 os_memcpy(mic, hash, MD5_MAC_LEN);
214 break;
215 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
216 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
217 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC");
218 return omac1_aes_128(key, buf, len, mic);
219 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
220 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
221 switch (akmp) {
222 #ifdef CONFIG_SAE
223 case WPA_KEY_MGMT_SAE:
224 case WPA_KEY_MGMT_FT_SAE:
225 wpa_printf(MSG_DEBUG,
226 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - SAE)");
227 return omac1_aes_128(key, buf, len, mic);
228 #endif /* CONFIG_SAE */
229 #ifdef CONFIG_HS20
230 case WPA_KEY_MGMT_OSEN:
231 wpa_printf(MSG_DEBUG,
232 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - OSEN)");
233 return omac1_aes_128(key, buf, len, mic);
234 #endif /* CONFIG_HS20 */
235 #ifdef CONFIG_SUITEB
236 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
237 wpa_printf(MSG_DEBUG,
238 "WPA: EAPOL-Key MIC using HMAC-SHA256 (AKM-defined - Suite B)");
239 if (hmac_sha256(key, key_len, buf, len, hash))
240 return -1;
241 os_memcpy(mic, hash, MD5_MAC_LEN);
242 break;
243 #endif /* CONFIG_SUITEB */
244 #ifdef CONFIG_SUITEB192
245 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
246 wpa_printf(MSG_DEBUG,
247 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - Suite B 192-bit)");
248 if (hmac_sha384(key, key_len, buf, len, hash))
249 return -1;
250 os_memcpy(mic, hash, 24);
251 break;
252 #endif /* CONFIG_SUITEB192 */
253 #ifdef CONFIG_OWE
254 case WPA_KEY_MGMT_OWE:
255 wpa_printf(MSG_DEBUG,
256 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - OWE)",
257 (unsigned int) key_len * 8 * 2);
258 if (key_len == 128 / 8) {
259 if (hmac_sha256(key, key_len, buf, len, hash))
260 return -1;
261 } else if (key_len == 192 / 8) {
262 if (hmac_sha384(key, key_len, buf, len, hash))
263 return -1;
264 } else if (key_len == 256 / 8) {
265 if (hmac_sha512(key, key_len, buf, len, hash))
266 return -1;
267 } else {
268 wpa_printf(MSG_INFO,
269 "OWE: Unsupported KCK length: %u",
270 (unsigned int) key_len);
271 return -1;
272 }
273 os_memcpy(mic, hash, key_len);
274 break;
275 #endif /* CONFIG_OWE */
276 #ifdef CONFIG_DPP
277 case WPA_KEY_MGMT_DPP:
278 wpa_printf(MSG_DEBUG,
279 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - DPP)",
280 (unsigned int) key_len * 8 * 2);
281 if (key_len == 128 / 8) {
282 if (hmac_sha256(key, key_len, buf, len, hash))
283 return -1;
284 } else if (key_len == 192 / 8) {
285 if (hmac_sha384(key, key_len, buf, len, hash))
286 return -1;
287 } else if (key_len == 256 / 8) {
288 if (hmac_sha512(key, key_len, buf, len, hash))
289 return -1;
290 } else {
291 wpa_printf(MSG_INFO,
292 "DPP: Unsupported KCK length: %u",
293 (unsigned int) key_len);
294 return -1;
295 }
296 os_memcpy(mic, hash, key_len);
297 break;
298 #endif /* CONFIG_DPP */
299 #if defined(CONFIG_IEEE80211R) && defined(CONFIG_SHA384)
300 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
301 wpa_printf(MSG_DEBUG,
302 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - FT 802.1X SHA384)");
303 if (hmac_sha384(key, key_len, buf, len, hash))
304 return -1;
305 os_memcpy(mic, hash, 24);
306 break;
307 #endif /* CONFIG_IEEE80211R && CONFIG_SHA384 */
308 default:
309 wpa_printf(MSG_DEBUG,
310 "WPA: EAPOL-Key MIC algorithm not known (AKM-defined - akmp=0x%x)",
311 akmp);
312 return -1;
313 }
314 break;
315 default:
316 wpa_printf(MSG_DEBUG,
317 "WPA: EAPOL-Key MIC algorithm not known (ver=%d)",
318 ver);
319 return -1;
320 }
321
322 return 0;
323 }
324
325
326 /**
327 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
328 * @pmk: Pairwise master key
329 * @pmk_len: Length of PMK
330 * @label: Label to use in derivation
331 * @addr1: AA or SA
332 * @addr2: SA or AA
333 * @nonce1: ANonce or SNonce
334 * @nonce2: SNonce or ANonce
335 * @ptk: Buffer for pairwise transient key
336 * @akmp: Negotiated AKM
337 * @cipher: Negotiated pairwise cipher
338 * Returns: 0 on success, -1 on failure
339 *
340 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
341 * PTK = PRF-X(PMK, "Pairwise key expansion",
342 * Min(AA, SA) || Max(AA, SA) ||
343 * Min(ANonce, SNonce) || Max(ANonce, SNonce)
344 * [ || Z.x ])
345 *
346 * The optional Z.x component is used only with DPP and that part is not defined
347 * in IEEE 802.11.
348 */
349 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
350 const u8 *addr1, const u8 *addr2,
351 const u8 *nonce1, const u8 *nonce2,
352 struct wpa_ptk *ptk, int akmp, int cipher,
353 const u8 *z, size_t z_len)
354 {
355 #define MAX_Z_LEN 66 /* with NIST P-521 */
356 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN];
357 size_t data_len = 2 * ETH_ALEN + 2 * WPA_NONCE_LEN;
358 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
359 size_t ptk_len;
360
361 if (pmk_len == 0) {
362 wpa_printf(MSG_ERROR, "WPA: No PMK set for PTK derivation");
363 return -1;
364 }
365
366 if (z_len > MAX_Z_LEN)
367 return -1;
368
369 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
370 os_memcpy(data, addr1, ETH_ALEN);
371 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
372 } else {
373 os_memcpy(data, addr2, ETH_ALEN);
374 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
375 }
376
377 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
378 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
379 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
380 WPA_NONCE_LEN);
381 } else {
382 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
383 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
384 WPA_NONCE_LEN);
385 }
386
387 if (z && z_len) {
388 os_memcpy(data + 2 * ETH_ALEN + 2 * WPA_NONCE_LEN, z, z_len);
389 data_len += z_len;
390 }
391
392 ptk->kck_len = wpa_kck_len(akmp, pmk_len);
393 ptk->kek_len = wpa_kek_len(akmp, pmk_len);
394 ptk->tk_len = wpa_cipher_key_len(cipher);
395 if (ptk->tk_len == 0) {
396 wpa_printf(MSG_ERROR,
397 "WPA: Unsupported cipher (0x%x) used in PTK derivation",
398 cipher);
399 return -1;
400 }
401 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
402
403 if (wpa_key_mgmt_sha384(akmp)) {
404 #if defined(CONFIG_SUITEB192) || defined(CONFIG_FILS)
405 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
406 if (sha384_prf(pmk, pmk_len, label, data, data_len,
407 tmp, ptk_len) < 0)
408 return -1;
409 #else /* CONFIG_SUITEB192 || CONFIG_FILS */
410 return -1;
411 #endif /* CONFIG_SUITEB192 || CONFIG_FILS */
412 } else if (wpa_key_mgmt_sha256(akmp) || akmp == WPA_KEY_MGMT_OWE) {
413 #if defined(CONFIG_IEEE80211W) || defined(CONFIG_SAE) || defined(CONFIG_FILS)
414 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
415 if (sha256_prf(pmk, pmk_len, label, data, data_len,
416 tmp, ptk_len) < 0)
417 return -1;
418 #else /* CONFIG_IEEE80211W or CONFIG_SAE or CONFIG_FILS */
419 return -1;
420 #endif /* CONFIG_IEEE80211W or CONFIG_SAE or CONFIG_FILS */
421 #ifdef CONFIG_DPP
422 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 32) {
423 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
424 if (sha256_prf(pmk, pmk_len, label, data, data_len,
425 tmp, ptk_len) < 0)
426 return -1;
427 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 48) {
428 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
429 if (sha384_prf(pmk, pmk_len, label, data, data_len,
430 tmp, ptk_len) < 0)
431 return -1;
432 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 64) {
433 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)");
434 if (sha512_prf(pmk, pmk_len, label, data, data_len,
435 tmp, ptk_len) < 0)
436 return -1;
437 } else if (akmp == WPA_KEY_MGMT_DPP) {
438 wpa_printf(MSG_INFO, "DPP: Unknown PMK length %u",
439 (unsigned int) pmk_len);
440 return -1;
441 #endif /* CONFIG_DPP */
442 } else {
443 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA1)");
444 if (sha1_prf(pmk, pmk_len, label, data, data_len, tmp,
445 ptk_len) < 0)
446 return -1;
447 }
448
449 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
450 MAC2STR(addr1), MAC2STR(addr2));
451 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
452 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
453 if (z && z_len)
454 wpa_hexdump_key(MSG_DEBUG, "WPA: Z.x", z, z_len);
455 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
456 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len);
457
458 os_memcpy(ptk->kck, tmp, ptk->kck_len);
459 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len);
460
461 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
462 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
463
464 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
465 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
466
467 ptk->kek2_len = 0;
468 ptk->kck2_len = 0;
469
470 os_memset(tmp, 0, sizeof(tmp));
471 os_memset(data, 0, data_len);
472 return 0;
473 }
474
475 #ifdef CONFIG_FILS
476
477 int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len,
478 const u8 *snonce, const u8 *anonce, const u8 *dh_ss,
479 size_t dh_ss_len, u8 *pmk, size_t *pmk_len)
480 {
481 u8 nonces[2 * FILS_NONCE_LEN];
482 const u8 *addr[2];
483 size_t len[2];
484 size_t num_elem;
485 int res;
486
487 /* PMK = HMAC-Hash(SNonce || ANonce, rMSK [ || DHss ]) */
488 wpa_printf(MSG_DEBUG, "FILS: rMSK to PMK derivation");
489
490 if (wpa_key_mgmt_sha384(akmp))
491 *pmk_len = SHA384_MAC_LEN;
492 else if (wpa_key_mgmt_sha256(akmp))
493 *pmk_len = SHA256_MAC_LEN;
494 else
495 return -1;
496
497 wpa_hexdump_key(MSG_DEBUG, "FILS: rMSK", rmsk, rmsk_len);
498 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
499 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
500 wpa_hexdump(MSG_DEBUG, "FILS: DHss", dh_ss, dh_ss_len);
501
502 os_memcpy(nonces, snonce, FILS_NONCE_LEN);
503 os_memcpy(&nonces[FILS_NONCE_LEN], anonce, FILS_NONCE_LEN);
504 addr[0] = rmsk;
505 len[0] = rmsk_len;
506 num_elem = 1;
507 if (dh_ss) {
508 addr[1] = dh_ss;
509 len[1] = dh_ss_len;
510 num_elem++;
511 }
512 if (wpa_key_mgmt_sha384(akmp))
513 res = hmac_sha384_vector(nonces, 2 * FILS_NONCE_LEN, num_elem,
514 addr, len, pmk);
515 else
516 res = hmac_sha256_vector(nonces, 2 * FILS_NONCE_LEN, num_elem,
517 addr, len, pmk);
518 if (res == 0)
519 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, *pmk_len);
520 else
521 *pmk_len = 0;
522 return res;
523 }
524
525
526 int fils_pmkid_erp(int akmp, const u8 *reauth, size_t reauth_len,
527 u8 *pmkid)
528 {
529 const u8 *addr[1];
530 size_t len[1];
531 u8 hash[SHA384_MAC_LEN];
532 int res;
533
534 /* PMKID = Truncate-128(Hash(EAP-Initiate/Reauth)) */
535 addr[0] = reauth;
536 len[0] = reauth_len;
537 if (wpa_key_mgmt_sha384(akmp))
538 res = sha384_vector(1, addr, len, hash);
539 else if (wpa_key_mgmt_sha256(akmp))
540 res = sha256_vector(1, addr, len, hash);
541 else
542 return -1;
543 if (res)
544 return res;
545 os_memcpy(pmkid, hash, PMKID_LEN);
546 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
547 return 0;
548 }
549
550
551 int fils_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const u8 *spa, const u8 *aa,
552 const u8 *snonce, const u8 *anonce, const u8 *dhss,
553 size_t dhss_len, struct wpa_ptk *ptk,
554 u8 *ick, size_t *ick_len, int akmp, int cipher,
555 u8 *fils_ft, size_t *fils_ft_len)
556 {
557 u8 *data, *pos;
558 size_t data_len;
559 u8 tmp[FILS_ICK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
560 FILS_FT_MAX_LEN];
561 size_t key_data_len;
562 const char *label = "FILS PTK Derivation";
563 int ret = -1;
564
565 /*
566 * FILS-Key-Data = PRF-X(PMK, "FILS PTK Derivation",
567 * SPA || AA || SNonce || ANonce [ || DHss ])
568 * ICK = L(FILS-Key-Data, 0, ICK_bits)
569 * KEK = L(FILS-Key-Data, ICK_bits, KEK_bits)
570 * TK = L(FILS-Key-Data, ICK_bits + KEK_bits, TK_bits)
571 * If doing FT initial mobility domain association:
572 * FILS-FT = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits,
573 * FILS-FT_bits)
574 */
575 data_len = 2 * ETH_ALEN + 2 * FILS_NONCE_LEN + dhss_len;
576 data = os_malloc(data_len);
577 if (!data)
578 goto err;
579 pos = data;
580 os_memcpy(pos, spa, ETH_ALEN);
581 pos += ETH_ALEN;
582 os_memcpy(pos, aa, ETH_ALEN);
583 pos += ETH_ALEN;
584 os_memcpy(pos, snonce, FILS_NONCE_LEN);
585 pos += FILS_NONCE_LEN;
586 os_memcpy(pos, anonce, FILS_NONCE_LEN);
587 pos += FILS_NONCE_LEN;
588 if (dhss)
589 os_memcpy(pos, dhss, dhss_len);
590
591 ptk->kck_len = 0;
592 ptk->kek_len = wpa_kek_len(akmp, pmk_len);
593 ptk->tk_len = wpa_cipher_key_len(cipher);
594 if (wpa_key_mgmt_sha384(akmp))
595 *ick_len = 48;
596 else if (wpa_key_mgmt_sha256(akmp))
597 *ick_len = 32;
598 else
599 goto err;
600 key_data_len = *ick_len + ptk->kek_len + ptk->tk_len;
601
602 if (fils_ft && fils_ft_len) {
603 if (akmp == WPA_KEY_MGMT_FT_FILS_SHA256) {
604 *fils_ft_len = 32;
605 } else if (akmp == WPA_KEY_MGMT_FT_FILS_SHA384) {
606 *fils_ft_len = 48;
607 } else {
608 *fils_ft_len = 0;
609 fils_ft = NULL;
610 }
611 key_data_len += *fils_ft_len;
612 }
613
614 if (wpa_key_mgmt_sha384(akmp)) {
615 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA384)");
616 if (sha384_prf(pmk, pmk_len, label, data, data_len,
617 tmp, key_data_len) < 0)
618 goto err;
619 } else {
620 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA256)");
621 if (sha256_prf(pmk, pmk_len, label, data, data_len,
622 tmp, key_data_len) < 0)
623 goto err;
624 }
625
626 wpa_printf(MSG_DEBUG, "FILS: PTK derivation - SPA=" MACSTR
627 " AA=" MACSTR, MAC2STR(spa), MAC2STR(aa));
628 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
629 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
630 if (dhss)
631 wpa_hexdump_key(MSG_DEBUG, "FILS: DHss", dhss, dhss_len);
632 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, pmk_len);
633 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-Key-Data", tmp, key_data_len);
634
635 os_memcpy(ick, tmp, *ick_len);
636 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, *ick_len);
637
638 os_memcpy(ptk->kek, tmp + *ick_len, ptk->kek_len);
639 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK", ptk->kek, ptk->kek_len);
640
641 os_memcpy(ptk->tk, tmp + *ick_len + ptk->kek_len, ptk->tk_len);
642 wpa_hexdump_key(MSG_DEBUG, "FILS: TK", ptk->tk, ptk->tk_len);
643
644 if (fils_ft && fils_ft_len) {
645 os_memcpy(fils_ft, tmp + *ick_len + ptk->kek_len + ptk->tk_len,
646 *fils_ft_len);
647 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-FT",
648 fils_ft, *fils_ft_len);
649 }
650
651 ptk->kek2_len = 0;
652 ptk->kck2_len = 0;
653
654 os_memset(tmp, 0, sizeof(tmp));
655 ret = 0;
656 err:
657 bin_clear_free(data, data_len);
658 return ret;
659 }
660
661
662 int fils_key_auth_sk(const u8 *ick, size_t ick_len, const u8 *snonce,
663 const u8 *anonce, const u8 *sta_addr, const u8 *bssid,
664 const u8 *g_sta, size_t g_sta_len,
665 const u8 *g_ap, size_t g_ap_len,
666 int akmp, u8 *key_auth_sta, u8 *key_auth_ap,
667 size_t *key_auth_len)
668 {
669 const u8 *addr[6];
670 size_t len[6];
671 size_t num_elem = 4;
672 int res;
673
674 wpa_printf(MSG_DEBUG, "FILS: Key-Auth derivation: STA-MAC=" MACSTR
675 " AP-BSSID=" MACSTR, MAC2STR(sta_addr), MAC2STR(bssid));
676 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, ick_len);
677 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
678 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
679 wpa_hexdump(MSG_DEBUG, "FILS: gSTA", g_sta, g_sta_len);
680 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len);
681
682 /*
683 * For (Re)Association Request frame (STA->AP):
684 * Key-Auth = HMAC-Hash(ICK, SNonce || ANonce || STA-MAC || AP-BSSID
685 * [ || gSTA || gAP ])
686 */
687 addr[0] = snonce;
688 len[0] = FILS_NONCE_LEN;
689 addr[1] = anonce;
690 len[1] = FILS_NONCE_LEN;
691 addr[2] = sta_addr;
692 len[2] = ETH_ALEN;
693 addr[3] = bssid;
694 len[3] = ETH_ALEN;
695 if (g_sta && g_ap_len && g_ap && g_ap_len) {
696 addr[4] = g_sta;
697 len[4] = g_sta_len;
698 addr[5] = g_ap;
699 len[5] = g_ap_len;
700 num_elem = 6;
701 }
702
703 if (wpa_key_mgmt_sha384(akmp)) {
704 *key_auth_len = 48;
705 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len,
706 key_auth_sta);
707 } else if (wpa_key_mgmt_sha256(akmp)) {
708 *key_auth_len = 32;
709 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len,
710 key_auth_sta);
711 } else {
712 return -1;
713 }
714 if (res < 0)
715 return res;
716
717 /*
718 * For (Re)Association Response frame (AP->STA):
719 * Key-Auth = HMAC-Hash(ICK, ANonce || SNonce || AP-BSSID || STA-MAC
720 * [ || gAP || gSTA ])
721 */
722 addr[0] = anonce;
723 addr[1] = snonce;
724 addr[2] = bssid;
725 addr[3] = sta_addr;
726 if (g_sta && g_ap_len && g_ap && g_ap_len) {
727 addr[4] = g_ap;
728 len[4] = g_ap_len;
729 addr[5] = g_sta;
730 len[5] = g_sta_len;
731 }
732
733 if (wpa_key_mgmt_sha384(akmp))
734 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len,
735 key_auth_ap);
736 else if (wpa_key_mgmt_sha256(akmp))
737 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len,
738 key_auth_ap);
739 if (res < 0)
740 return res;
741
742 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (STA)",
743 key_auth_sta, *key_auth_len);
744 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (AP)",
745 key_auth_ap, *key_auth_len);
746
747 return 0;
748 }
749
750 #endif /* CONFIG_FILS */
751
752
753 #ifdef CONFIG_IEEE80211R
754 int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr,
755 const u8 *ap_addr, u8 transaction_seqnum,
756 const u8 *mdie, size_t mdie_len,
757 const u8 *ftie, size_t ftie_len,
758 const u8 *rsnie, size_t rsnie_len,
759 const u8 *ric, size_t ric_len, u8 *mic)
760 {
761 const u8 *addr[9];
762 size_t len[9];
763 size_t i, num_elem = 0;
764 u8 zero_mic[24];
765 size_t mic_len, fte_fixed_len;
766
767 if (kck_len == 16) {
768 mic_len = 16;
769 #ifdef CONFIG_SHA384
770 } else if (kck_len == 24) {
771 mic_len = 24;
772 #endif /* CONFIG_SHA384 */
773 } else {
774 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u",
775 (unsigned int) kck_len);
776 return -1;
777 }
778
779 fte_fixed_len = sizeof(struct rsn_ftie) - 16 + mic_len;
780
781 addr[num_elem] = sta_addr;
782 len[num_elem] = ETH_ALEN;
783 num_elem++;
784
785 addr[num_elem] = ap_addr;
786 len[num_elem] = ETH_ALEN;
787 num_elem++;
788
789 addr[num_elem] = &transaction_seqnum;
790 len[num_elem] = 1;
791 num_elem++;
792
793 if (rsnie) {
794 addr[num_elem] = rsnie;
795 len[num_elem] = rsnie_len;
796 num_elem++;
797 }
798 if (mdie) {
799 addr[num_elem] = mdie;
800 len[num_elem] = mdie_len;
801 num_elem++;
802 }
803 if (ftie) {
804 if (ftie_len < 2 + fte_fixed_len)
805 return -1;
806
807 /* IE hdr and mic_control */
808 addr[num_elem] = ftie;
809 len[num_elem] = 2 + 2;
810 num_elem++;
811
812 /* MIC field with all zeros */
813 os_memset(zero_mic, 0, mic_len);
814 addr[num_elem] = zero_mic;
815 len[num_elem] = mic_len;
816 num_elem++;
817
818 /* Rest of FTIE */
819 addr[num_elem] = ftie + 2 + 2 + mic_len;
820 len[num_elem] = ftie_len - (2 + 2 + mic_len);
821 num_elem++;
822 }
823 if (ric) {
824 addr[num_elem] = ric;
825 len[num_elem] = ric_len;
826 num_elem++;
827 }
828
829 for (i = 0; i < num_elem; i++)
830 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]);
831 #ifdef CONFIG_SHA384
832 if (kck_len == 24) {
833 u8 hash[SHA384_MAC_LEN];
834
835 if (hmac_sha384_vector(kck, kck_len, num_elem, addr, len, hash))
836 return -1;
837 os_memcpy(mic, hash, 24);
838 }
839 #endif /* CONFIG_SHA384 */
840 if (kck_len == 16 &&
841 omac1_aes_128_vector(kck, num_elem, addr, len, mic))
842 return -1;
843
844 return 0;
845 }
846
847
848 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
849 struct wpa_ft_ies *parse, int use_sha384)
850 {
851 const u8 *end, *pos;
852
853 parse->ftie = ie;
854 parse->ftie_len = ie_len;
855
856 pos = ie + (use_sha384 ? sizeof(struct rsn_ftie_sha384) :
857 sizeof(struct rsn_ftie));
858 end = ie + ie_len;
859 wpa_hexdump(MSG_DEBUG, "FT: Parse FTE subelements", pos, end - pos);
860
861 while (end - pos >= 2) {
862 u8 id, len;
863
864 id = *pos++;
865 len = *pos++;
866 if (len > end - pos) {
867 wpa_printf(MSG_DEBUG, "FT: Truncated subelement");
868 break;
869 }
870
871 switch (id) {
872 case FTIE_SUBELEM_R1KH_ID:
873 if (len != FT_R1KH_ID_LEN) {
874 wpa_printf(MSG_DEBUG,
875 "FT: Invalid R1KH-ID length in FTIE: %d",
876 len);
877 return -1;
878 }
879 parse->r1kh_id = pos;
880 break;
881 case FTIE_SUBELEM_GTK:
882 parse->gtk = pos;
883 parse->gtk_len = len;
884 break;
885 case FTIE_SUBELEM_R0KH_ID:
886 if (len < 1 || len > FT_R0KH_ID_MAX_LEN) {
887 wpa_printf(MSG_DEBUG,
888 "FT: Invalid R0KH-ID length in FTIE: %d",
889 len);
890 return -1;
891 }
892 parse->r0kh_id = pos;
893 parse->r0kh_id_len = len;
894 break;
895 #ifdef CONFIG_IEEE80211W
896 case FTIE_SUBELEM_IGTK:
897 parse->igtk = pos;
898 parse->igtk_len = len;
899 break;
900 #endif /* CONFIG_IEEE80211W */
901 #ifdef CONFIG_OCV
902 case FTIE_SUBELEM_OCI:
903 parse->oci = pos;
904 parse->oci_len = len;
905 break;
906 #endif /* CONFIG_OCV */
907 default:
908 wpa_printf(MSG_DEBUG, "FT: Unknown subelem id %u", id);
909 break;
910 }
911
912 pos += len;
913 }
914
915 return 0;
916 }
917
918
919 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
920 struct wpa_ft_ies *parse, int use_sha384)
921 {
922 const u8 *end, *pos;
923 struct wpa_ie_data data;
924 int ret;
925 const struct rsn_ftie *ftie;
926 int prot_ie_count = 0;
927 int update_use_sha384 = 0;
928
929 if (use_sha384 < 0) {
930 use_sha384 = 0;
931 update_use_sha384 = 1;
932 }
933
934 os_memset(parse, 0, sizeof(*parse));
935 if (ies == NULL)
936 return 0;
937
938 pos = ies;
939 end = ies + ies_len;
940 while (end - pos >= 2) {
941 u8 id, len;
942
943 id = *pos++;
944 len = *pos++;
945 if (len > end - pos)
946 break;
947
948 switch (id) {
949 case WLAN_EID_RSN:
950 wpa_hexdump(MSG_DEBUG, "FT: RSNE", pos, len);
951 parse->rsn = pos;
952 parse->rsn_len = len;
953 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
954 parse->rsn_len + 2,
955 &data);
956 if (ret < 0) {
957 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
958 "RSN IE: %d", ret);
959 return -1;
960 }
961 if (data.num_pmkid == 1 && data.pmkid)
962 parse->rsn_pmkid = data.pmkid;
963 parse->key_mgmt = data.key_mgmt;
964 parse->pairwise_cipher = data.pairwise_cipher;
965 if (update_use_sha384) {
966 use_sha384 =
967 wpa_key_mgmt_sha384(parse->key_mgmt);
968 update_use_sha384 = 0;
969 }
970 break;
971 case WLAN_EID_MOBILITY_DOMAIN:
972 wpa_hexdump(MSG_DEBUG, "FT: MDE", pos, len);
973 if (len < sizeof(struct rsn_mdie))
974 return -1;
975 parse->mdie = pos;
976 parse->mdie_len = len;
977 break;
978 case WLAN_EID_FAST_BSS_TRANSITION:
979 wpa_hexdump(MSG_DEBUG, "FT: FTE", pos, len);
980 if (use_sha384) {
981 const struct rsn_ftie_sha384 *ftie_sha384;
982
983 if (len < sizeof(*ftie_sha384))
984 return -1;
985 ftie_sha384 =
986 (const struct rsn_ftie_sha384 *) pos;
987 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control",
988 ftie_sha384->mic_control, 2);
989 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC",
990 ftie_sha384->mic,
991 sizeof(ftie_sha384->mic));
992 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce",
993 ftie_sha384->anonce,
994 WPA_NONCE_LEN);
995 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce",
996 ftie_sha384->snonce,
997 WPA_NONCE_LEN);
998 prot_ie_count = ftie_sha384->mic_control[1];
999 if (wpa_ft_parse_ftie(pos, len, parse, 1) < 0)
1000 return -1;
1001 break;
1002 }
1003
1004 if (len < sizeof(*ftie))
1005 return -1;
1006 ftie = (const struct rsn_ftie *) pos;
1007 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control",
1008 ftie->mic_control, 2);
1009 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC",
1010 ftie->mic, sizeof(ftie->mic));
1011 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce",
1012 ftie->anonce, WPA_NONCE_LEN);
1013 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce",
1014 ftie->snonce, WPA_NONCE_LEN);
1015 prot_ie_count = ftie->mic_control[1];
1016 if (wpa_ft_parse_ftie(pos, len, parse, 0) < 0)
1017 return -1;
1018 break;
1019 case WLAN_EID_TIMEOUT_INTERVAL:
1020 wpa_hexdump(MSG_DEBUG, "FT: Timeout Interval",
1021 pos, len);
1022 if (len != 5)
1023 break;
1024 parse->tie = pos;
1025 parse->tie_len = len;
1026 break;
1027 case WLAN_EID_RIC_DATA:
1028 if (parse->ric == NULL)
1029 parse->ric = pos - 2;
1030 break;
1031 }
1032
1033 pos += len;
1034 }
1035
1036 if (prot_ie_count == 0)
1037 return 0; /* no MIC */
1038
1039 /*
1040 * Check that the protected IE count matches with IEs included in the
1041 * frame.
1042 */
1043 if (parse->rsn)
1044 prot_ie_count--;
1045 if (parse->mdie)
1046 prot_ie_count--;
1047 if (parse->ftie)
1048 prot_ie_count--;
1049 if (prot_ie_count < 0) {
1050 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
1051 "the protected IE count");
1052 return -1;
1053 }
1054
1055 if (prot_ie_count == 0 && parse->ric) {
1056 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
1057 "included in protected IE count");
1058 return -1;
1059 }
1060
1061 /* Determine the end of the RIC IE(s) */
1062 if (parse->ric) {
1063 pos = parse->ric;
1064 while (end - pos >= 2 && 2 + pos[1] <= end - pos &&
1065 prot_ie_count) {
1066 prot_ie_count--;
1067 pos += 2 + pos[1];
1068 }
1069 parse->ric_len = pos - parse->ric;
1070 }
1071 if (prot_ie_count) {
1072 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
1073 "frame", (int) prot_ie_count);
1074 return -1;
1075 }
1076
1077 return 0;
1078 }
1079 #endif /* CONFIG_IEEE80211R */
1080
1081
1082 static int rsn_selector_to_bitfield(const u8 *s)
1083 {
1084 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
1085 return WPA_CIPHER_NONE;
1086 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
1087 return WPA_CIPHER_TKIP;
1088 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
1089 return WPA_CIPHER_CCMP;
1090 #ifdef CONFIG_IEEE80211W
1091 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
1092 return WPA_CIPHER_AES_128_CMAC;
1093 #endif /* CONFIG_IEEE80211W */
1094 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
1095 return WPA_CIPHER_GCMP;
1096 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
1097 return WPA_CIPHER_CCMP_256;
1098 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
1099 return WPA_CIPHER_GCMP_256;
1100 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
1101 return WPA_CIPHER_BIP_GMAC_128;
1102 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
1103 return WPA_CIPHER_BIP_GMAC_256;
1104 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
1105 return WPA_CIPHER_BIP_CMAC_256;
1106 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
1107 return WPA_CIPHER_GTK_NOT_USED;
1108 return 0;
1109 }
1110
1111
1112 static int rsn_key_mgmt_to_bitfield(const u8 *s)
1113 {
1114 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
1115 return WPA_KEY_MGMT_IEEE8021X;
1116 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
1117 return WPA_KEY_MGMT_PSK;
1118 #ifdef CONFIG_IEEE80211R
1119 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
1120 return WPA_KEY_MGMT_FT_IEEE8021X;
1121 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
1122 return WPA_KEY_MGMT_FT_PSK;
1123 #ifdef CONFIG_SHA384
1124 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384)
1125 return WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
1126 #endif /* CONFIG_SHA384 */
1127 #endif /* CONFIG_IEEE80211R */
1128 #ifdef CONFIG_IEEE80211W
1129 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
1130 return WPA_KEY_MGMT_IEEE8021X_SHA256;
1131 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
1132 return WPA_KEY_MGMT_PSK_SHA256;
1133 #endif /* CONFIG_IEEE80211W */
1134 #ifdef CONFIG_SAE
1135 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
1136 return WPA_KEY_MGMT_SAE;
1137 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
1138 return WPA_KEY_MGMT_FT_SAE;
1139 #endif /* CONFIG_SAE */
1140 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
1141 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
1142 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192)
1143 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
1144 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA256)
1145 return WPA_KEY_MGMT_FILS_SHA256;
1146 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA384)
1147 return WPA_KEY_MGMT_FILS_SHA384;
1148 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA256)
1149 return WPA_KEY_MGMT_FT_FILS_SHA256;
1150 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA384)
1151 return WPA_KEY_MGMT_FT_FILS_SHA384;
1152 #ifdef CONFIG_OWE
1153 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OWE)
1154 return WPA_KEY_MGMT_OWE;
1155 #endif /* CONFIG_OWE */
1156 #ifdef CONFIG_DPP
1157 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_DPP)
1158 return WPA_KEY_MGMT_DPP;
1159 #endif /* CONFIG_DPP */
1160 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN)
1161 return WPA_KEY_MGMT_OSEN;
1162 return 0;
1163 }
1164
1165
1166 int wpa_cipher_valid_group(int cipher)
1167 {
1168 return wpa_cipher_valid_pairwise(cipher) ||
1169 cipher == WPA_CIPHER_GTK_NOT_USED;
1170 }
1171
1172
1173 #ifdef CONFIG_IEEE80211W
1174 int wpa_cipher_valid_mgmt_group(int cipher)
1175 {
1176 return cipher == WPA_CIPHER_AES_128_CMAC ||
1177 cipher == WPA_CIPHER_BIP_GMAC_128 ||
1178 cipher == WPA_CIPHER_BIP_GMAC_256 ||
1179 cipher == WPA_CIPHER_BIP_CMAC_256;
1180 }
1181 #endif /* CONFIG_IEEE80211W */
1182
1183
1184 /**
1185 * wpa_parse_wpa_ie_rsn - Parse RSN IE
1186 * @rsn_ie: Buffer containing RSN IE
1187 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
1188 * @data: Pointer to structure that will be filled in with parsed data
1189 * Returns: 0 on success, <0 on failure
1190 */
1191 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
1192 struct wpa_ie_data *data)
1193 {
1194 const u8 *pos;
1195 int left;
1196 int i, count;
1197
1198 os_memset(data, 0, sizeof(*data));
1199 data->proto = WPA_PROTO_RSN;
1200 data->pairwise_cipher = WPA_CIPHER_CCMP;
1201 data->group_cipher = WPA_CIPHER_CCMP;
1202 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1203 data->capabilities = 0;
1204 data->pmkid = NULL;
1205 data->num_pmkid = 0;
1206 #ifdef CONFIG_IEEE80211W
1207 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1208 #else /* CONFIG_IEEE80211W */
1209 data->mgmt_group_cipher = 0;
1210 #endif /* CONFIG_IEEE80211W */
1211
1212 if (rsn_ie_len == 0) {
1213 /* No RSN IE - fail silently */
1214 return -1;
1215 }
1216
1217 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
1218 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
1219 __func__, (unsigned long) rsn_ie_len);
1220 return -1;
1221 }
1222
1223 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 &&
1224 rsn_ie[1] == rsn_ie_len - 2 &&
1225 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) {
1226 pos = rsn_ie + 6;
1227 left = rsn_ie_len - 6;
1228
1229 data->group_cipher = WPA_CIPHER_GTK_NOT_USED;
1230 data->has_group = 1;
1231 data->key_mgmt = WPA_KEY_MGMT_OSEN;
1232 data->proto = WPA_PROTO_OSEN;
1233 } else {
1234 const struct rsn_ie_hdr *hdr;
1235
1236 hdr = (const struct rsn_ie_hdr *) rsn_ie;
1237
1238 if (hdr->elem_id != WLAN_EID_RSN ||
1239 hdr->len != rsn_ie_len - 2 ||
1240 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
1241 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
1242 __func__);
1243 return -2;
1244 }
1245
1246 pos = (const u8 *) (hdr + 1);
1247 left = rsn_ie_len - sizeof(*hdr);
1248 }
1249
1250 if (left >= RSN_SELECTOR_LEN) {
1251 data->group_cipher = rsn_selector_to_bitfield(pos);
1252 data->has_group = 1;
1253 if (!wpa_cipher_valid_group(data->group_cipher)) {
1254 wpa_printf(MSG_DEBUG,
1255 "%s: invalid group cipher 0x%x (%08x)",
1256 __func__, data->group_cipher,
1257 WPA_GET_BE32(pos));
1258 return -1;
1259 }
1260 pos += RSN_SELECTOR_LEN;
1261 left -= RSN_SELECTOR_LEN;
1262 } else if (left > 0) {
1263 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
1264 __func__, left);
1265 return -3;
1266 }
1267
1268 if (left >= 2) {
1269 data->pairwise_cipher = 0;
1270 count = WPA_GET_LE16(pos);
1271 pos += 2;
1272 left -= 2;
1273 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
1274 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
1275 "count %u left %u", __func__, count, left);
1276 return -4;
1277 }
1278 if (count)
1279 data->has_pairwise = 1;
1280 for (i = 0; i < count; i++) {
1281 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
1282 pos += RSN_SELECTOR_LEN;
1283 left -= RSN_SELECTOR_LEN;
1284 }
1285 #ifdef CONFIG_IEEE80211W
1286 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
1287 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
1288 "pairwise cipher", __func__);
1289 return -1;
1290 }
1291 #endif /* CONFIG_IEEE80211W */
1292 } else if (left == 1) {
1293 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
1294 __func__);
1295 return -5;
1296 }
1297
1298 if (left >= 2) {
1299 data->key_mgmt = 0;
1300 count = WPA_GET_LE16(pos);
1301 pos += 2;
1302 left -= 2;
1303 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
1304 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
1305 "count %u left %u", __func__, count, left);
1306 return -6;
1307 }
1308 for (i = 0; i < count; i++) {
1309 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
1310 pos += RSN_SELECTOR_LEN;
1311 left -= RSN_SELECTOR_LEN;
1312 }
1313 } else if (left == 1) {
1314 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
1315 __func__);
1316 return -7;
1317 }
1318
1319 if (left >= 2) {
1320 data->capabilities = WPA_GET_LE16(pos);
1321 pos += 2;
1322 left -= 2;
1323 }
1324
1325 if (left >= 2) {
1326 u16 num_pmkid = WPA_GET_LE16(pos);
1327 pos += 2;
1328 left -= 2;
1329 if (num_pmkid > (unsigned int) left / PMKID_LEN) {
1330 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
1331 "(num_pmkid=%u left=%d)",
1332 __func__, num_pmkid, left);
1333 data->num_pmkid = 0;
1334 return -9;
1335 } else {
1336 data->num_pmkid = num_pmkid;
1337 data->pmkid = pos;
1338 pos += data->num_pmkid * PMKID_LEN;
1339 left -= data->num_pmkid * PMKID_LEN;
1340 }
1341 }
1342
1343 #ifdef CONFIG_IEEE80211W
1344 if (left >= 4) {
1345 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
1346 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
1347 wpa_printf(MSG_DEBUG,
1348 "%s: Unsupported management group cipher 0x%x (%08x)",
1349 __func__, data->mgmt_group_cipher,
1350 WPA_GET_BE32(pos));
1351 return -10;
1352 }
1353 pos += RSN_SELECTOR_LEN;
1354 left -= RSN_SELECTOR_LEN;
1355 }
1356 #endif /* CONFIG_IEEE80211W */
1357
1358 if (left > 0) {
1359 wpa_hexdump(MSG_DEBUG,
1360 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
1361 pos, left);
1362 }
1363
1364 return 0;
1365 }
1366
1367
1368 static int wpa_selector_to_bitfield(const u8 *s)
1369 {
1370 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
1371 return WPA_CIPHER_NONE;
1372 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
1373 return WPA_CIPHER_TKIP;
1374 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
1375 return WPA_CIPHER_CCMP;
1376 return 0;
1377 }
1378
1379
1380 static int wpa_key_mgmt_to_bitfield(const u8 *s)
1381 {
1382 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
1383 return WPA_KEY_MGMT_IEEE8021X;
1384 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
1385 return WPA_KEY_MGMT_PSK;
1386 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
1387 return WPA_KEY_MGMT_WPA_NONE;
1388 return 0;
1389 }
1390
1391
1392 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
1393 struct wpa_ie_data *data)
1394 {
1395 const struct wpa_ie_hdr *hdr;
1396 const u8 *pos;
1397 int left;
1398 int i, count;
1399
1400 os_memset(data, 0, sizeof(*data));
1401 data->proto = WPA_PROTO_WPA;
1402 data->pairwise_cipher = WPA_CIPHER_TKIP;
1403 data->group_cipher = WPA_CIPHER_TKIP;
1404 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1405 data->capabilities = 0;
1406 data->pmkid = NULL;
1407 data->num_pmkid = 0;
1408 data->mgmt_group_cipher = 0;
1409
1410 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
1411 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
1412 __func__, (unsigned long) wpa_ie_len);
1413 return -1;
1414 }
1415
1416 hdr = (const struct wpa_ie_hdr *) wpa_ie;
1417
1418 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
1419 hdr->len != wpa_ie_len - 2 ||
1420 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
1421 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
1422 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
1423 __func__);
1424 return -2;
1425 }
1426
1427 pos = (const u8 *) (hdr + 1);
1428 left = wpa_ie_len - sizeof(*hdr);
1429
1430 if (left >= WPA_SELECTOR_LEN) {
1431 data->group_cipher = wpa_selector_to_bitfield(pos);
1432 pos += WPA_SELECTOR_LEN;
1433 left -= WPA_SELECTOR_LEN;
1434 } else if (left > 0) {
1435 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
1436 __func__, left);
1437 return -3;
1438 }
1439
1440 if (left >= 2) {
1441 data->pairwise_cipher = 0;
1442 count = WPA_GET_LE16(pos);
1443 pos += 2;
1444 left -= 2;
1445 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
1446 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
1447 "count %u left %u", __func__, count, left);
1448 return -4;
1449 }
1450 for (i = 0; i < count; i++) {
1451 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
1452 pos += WPA_SELECTOR_LEN;
1453 left -= WPA_SELECTOR_LEN;
1454 }
1455 } else if (left == 1) {
1456 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
1457 __func__);
1458 return -5;
1459 }
1460
1461 if (left >= 2) {
1462 data->key_mgmt = 0;
1463 count = WPA_GET_LE16(pos);
1464 pos += 2;
1465 left -= 2;
1466 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
1467 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
1468 "count %u left %u", __func__, count, left);
1469 return -6;
1470 }
1471 for (i = 0; i < count; i++) {
1472 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
1473 pos += WPA_SELECTOR_LEN;
1474 left -= WPA_SELECTOR_LEN;
1475 }
1476 } else if (left == 1) {
1477 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
1478 __func__);
1479 return -7;
1480 }
1481
1482 if (left >= 2) {
1483 data->capabilities = WPA_GET_LE16(pos);
1484 pos += 2;
1485 left -= 2;
1486 }
1487
1488 if (left > 0) {
1489 wpa_hexdump(MSG_DEBUG,
1490 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
1491 pos, left);
1492 }
1493
1494 return 0;
1495 }
1496
1497
1498 int wpa_default_rsn_cipher(int freq)
1499 {
1500 if (freq > 56160)
1501 return WPA_CIPHER_GCMP; /* DMG */
1502
1503 return WPA_CIPHER_CCMP;
1504 }
1505
1506
1507 #ifdef CONFIG_IEEE80211R
1508
1509 /**
1510 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
1511 *
1512 * IEEE Std 802.11r-2008 - 8.5.1.5.3
1513 */
1514 int wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
1515 const u8 *ssid, size_t ssid_len,
1516 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
1517 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name,
1518 int use_sha384)
1519 {
1520 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
1521 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
1522 u8 *pos, r0_key_data[64], hash[48];
1523 const u8 *addr[2];
1524 size_t len[2];
1525 size_t q = use_sha384 ? 48 : 32;
1526 size_t r0_key_data_len = q + 16;
1527
1528 /*
1529 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
1530 * SSIDlength || SSID || MDID || R0KHlength ||
1531 * R0KH-ID || S0KH-ID)
1532 * XXKey is either the second 256 bits of MSK or PSK; or the first
1533 * 384 bits of MSK for FT-EAP-SHA384.
1534 * PMK-R0 = L(R0-Key-Data, 0, Q)
1535 * PMK-R0Name-Salt = L(R0-Key-Data, Q, 128)
1536 * Q = 384 for FT-EAP-SHA384; otherwise, 256
1537 */
1538 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
1539 return -1;
1540 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R0 using KDF-%s",
1541 use_sha384 ? "SHA384" : "SHA256");
1542 wpa_hexdump_key(MSG_DEBUG, "FT: XXKey", xxkey, xxkey_len);
1543 wpa_hexdump_ascii(MSG_DEBUG, "FT: SSID", ssid, ssid_len);
1544 wpa_hexdump(MSG_DEBUG, "FT: MDID", mdid, MOBILITY_DOMAIN_ID_LEN);
1545 wpa_hexdump_ascii(MSG_DEBUG, "FT: R0KH-ID", r0kh_id, r0kh_id_len);
1546 wpa_printf(MSG_DEBUG, "FT: S0KH-ID: " MACSTR, MAC2STR(s0kh_id));
1547 pos = buf;
1548 *pos++ = ssid_len;
1549 os_memcpy(pos, ssid, ssid_len);
1550 pos += ssid_len;
1551 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
1552 pos += MOBILITY_DOMAIN_ID_LEN;
1553 *pos++ = r0kh_id_len;
1554 os_memcpy(pos, r0kh_id, r0kh_id_len);
1555 pos += r0kh_id_len;
1556 os_memcpy(pos, s0kh_id, ETH_ALEN);
1557 pos += ETH_ALEN;
1558
1559 #ifdef CONFIG_SHA384
1560 if (use_sha384) {
1561 if (xxkey_len != SHA384_MAC_LEN) {
1562 wpa_printf(MSG_ERROR,
1563 "FT: Unexpected XXKey length %d (expected %d)",
1564 (int) xxkey_len, SHA384_MAC_LEN);
1565 return -1;
1566 }
1567 if (sha384_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
1568 r0_key_data, r0_key_data_len) < 0)
1569 return -1;
1570 }
1571 #endif /* CONFIG_SHA384 */
1572 if (!use_sha384) {
1573 if (xxkey_len != PMK_LEN) {
1574 wpa_printf(MSG_ERROR,
1575 "FT: Unexpected XXKey length %d (expected %d)",
1576 (int) xxkey_len, PMK_LEN);
1577 return -1;
1578 }
1579 if (sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
1580 r0_key_data, r0_key_data_len) < 0)
1581 return -1;
1582 }
1583 os_memcpy(pmk_r0, r0_key_data, q);
1584 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, q);
1585 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0Name-Salt", &r0_key_data[q], 16);
1586
1587 /*
1588 * PMKR0Name = Truncate-128(Hash("FT-R0N" || PMK-R0Name-Salt)
1589 */
1590 addr[0] = (const u8 *) "FT-R0N";
1591 len[0] = 6;
1592 addr[1] = &r0_key_data[q];
1593 len[1] = 16;
1594
1595 #ifdef CONFIG_SHA384
1596 if (use_sha384 && sha384_vector(2, addr, len, hash) < 0)
1597 return -1;
1598 #endif /* CONFIG_SHA384 */
1599 if (!use_sha384 && sha256_vector(2, addr, len, hash) < 0)
1600 return -1;
1601 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
1602 os_memset(r0_key_data, 0, sizeof(r0_key_data));
1603 return 0;
1604 }
1605
1606
1607 /**
1608 * wpa_derive_pmk_r1_name - Derive PMKR1Name
1609 *
1610 * IEEE Std 802.11r-2008 - 8.5.1.5.4
1611 */
1612 int wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
1613 const u8 *s1kh_id, u8 *pmk_r1_name, int use_sha384)
1614 {
1615 u8 hash[48];
1616 const u8 *addr[4];
1617 size_t len[4];
1618
1619 /*
1620 * PMKR1Name = Truncate-128(Hash("FT-R1N" || PMKR0Name ||
1621 * R1KH-ID || S1KH-ID))
1622 */
1623 addr[0] = (const u8 *) "FT-R1N";
1624 len[0] = 6;
1625 addr[1] = pmk_r0_name;
1626 len[1] = WPA_PMK_NAME_LEN;
1627 addr[2] = r1kh_id;
1628 len[2] = FT_R1KH_ID_LEN;
1629 addr[3] = s1kh_id;
1630 len[3] = ETH_ALEN;
1631
1632 #ifdef CONFIG_SHA384
1633 if (use_sha384 && sha384_vector(4, addr, len, hash) < 0)
1634 return -1;
1635 #endif /* CONFIG_SHA384 */
1636 if (!use_sha384 && sha256_vector(4, addr, len, hash) < 0)
1637 return -1;
1638 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
1639 return 0;
1640 }
1641
1642
1643 /**
1644 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
1645 *
1646 * IEEE Std 802.11r-2008 - 8.5.1.5.4
1647 */
1648 int wpa_derive_pmk_r1(const u8 *pmk_r0, size_t pmk_r0_len,
1649 const u8 *pmk_r0_name,
1650 const u8 *r1kh_id, const u8 *s1kh_id,
1651 u8 *pmk_r1, u8 *pmk_r1_name)
1652 {
1653 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
1654 u8 *pos;
1655
1656 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
1657 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R1 using KDF-%s",
1658 pmk_r0_len == SHA384_MAC_LEN ? "SHA384" : "SHA256");
1659 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
1660 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", r1kh_id, FT_R1KH_ID_LEN);
1661 wpa_printf(MSG_DEBUG, "FT: S1KH-ID: " MACSTR, MAC2STR(s1kh_id));
1662 pos = buf;
1663 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
1664 pos += FT_R1KH_ID_LEN;
1665 os_memcpy(pos, s1kh_id, ETH_ALEN);
1666 pos += ETH_ALEN;
1667
1668 #ifdef CONFIG_SHA384
1669 if (pmk_r0_len == SHA384_MAC_LEN &&
1670 sha384_prf(pmk_r0, pmk_r0_len, "FT-R1",
1671 buf, pos - buf, pmk_r1, pmk_r0_len) < 0)
1672 return -1;
1673 #endif /* CONFIG_SHA384 */
1674 if (pmk_r0_len == PMK_LEN &&
1675 sha256_prf(pmk_r0, pmk_r0_len, "FT-R1",
1676 buf, pos - buf, pmk_r1, pmk_r0_len) < 0)
1677 return -1;
1678 if (pmk_r0_len != SHA384_MAC_LEN && pmk_r0_len != PMK_LEN) {
1679 wpa_printf(MSG_ERROR, "FT: Unexpected PMK-R0 length %d",
1680 (int) pmk_r0_len);
1681 return -1;
1682 }
1683 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r0_len);
1684
1685 return wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id,
1686 pmk_r1_name,
1687 pmk_r0_len == SHA384_MAC_LEN);
1688 }
1689
1690
1691 /**
1692 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
1693 *
1694 * IEEE Std 802.11r-2008 - 8.5.1.5.5
1695 */
1696 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, size_t pmk_r1_len,
1697 const u8 *snonce, const u8 *anonce,
1698 const u8 *sta_addr, const u8 *bssid,
1699 const u8 *pmk_r1_name,
1700 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher)
1701 {
1702 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
1703 u8 *pos, hash[32];
1704 const u8 *addr[6];
1705 size_t len[6];
1706 u8 tmp[2 * WPA_KCK_MAX_LEN + 2 * WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
1707 size_t ptk_len, offset;
1708 int use_sha384 = wpa_key_mgmt_sha384(akmp);
1709
1710 /*
1711 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
1712 * BSSID || STA-ADDR)
1713 */
1714 wpa_printf(MSG_DEBUG, "FT: Derive PTK using KDF-%s",
1715 use_sha384 ? "SHA384" : "SHA256");
1716 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
1717 wpa_hexdump(MSG_DEBUG, "FT: SNonce", snonce, WPA_NONCE_LEN);
1718 wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN);
1719 wpa_printf(MSG_DEBUG, "FT: BSSID=" MACSTR " STA-ADDR=" MACSTR,
1720 MAC2STR(bssid), MAC2STR(sta_addr));
1721 pos = buf;
1722 os_memcpy(pos, snonce, WPA_NONCE_LEN);
1723 pos += WPA_NONCE_LEN;
1724 os_memcpy(pos, anonce, WPA_NONCE_LEN);
1725 pos += WPA_NONCE_LEN;
1726 os_memcpy(pos, bssid, ETH_ALEN);
1727 pos += ETH_ALEN;
1728 os_memcpy(pos, sta_addr, ETH_ALEN);
1729 pos += ETH_ALEN;
1730
1731 ptk->kck_len = wpa_kck_len(akmp, PMK_LEN);
1732 ptk->kck2_len = wpa_kck2_len(akmp);
1733 ptk->kek_len = wpa_kek_len(akmp, PMK_LEN);
1734 ptk->kek2_len = wpa_kek2_len(akmp);
1735 ptk->tk_len = wpa_cipher_key_len(cipher);
1736 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len +
1737 ptk->kck2_len + ptk->kek2_len;
1738
1739 #ifdef CONFIG_SHA384
1740 if (use_sha384) {
1741 if (pmk_r1_len != SHA384_MAC_LEN) {
1742 wpa_printf(MSG_ERROR,
1743 "FT: Unexpected PMK-R1 length %d (expected %d)",
1744 (int) pmk_r1_len, SHA384_MAC_LEN);
1745 return -1;
1746 }
1747 if (sha384_prf(pmk_r1, pmk_r1_len, "FT-PTK",
1748 buf, pos - buf, tmp, ptk_len) < 0)
1749 return -1;
1750 }
1751 #endif /* CONFIG_SHA384 */
1752 if (!use_sha384) {
1753 if (pmk_r1_len != PMK_LEN) {
1754 wpa_printf(MSG_ERROR,
1755 "FT: Unexpected PMK-R1 length %d (expected %d)",
1756 (int) pmk_r1_len, PMK_LEN);
1757 return -1;
1758 }
1759 if (sha256_prf(pmk_r1, pmk_r1_len, "FT-PTK",
1760 buf, pos - buf, tmp, ptk_len) < 0)
1761 return -1;
1762 }
1763 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", tmp, ptk_len);
1764
1765 /*
1766 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
1767 * ANonce || BSSID || STA-ADDR))
1768 */
1769 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
1770 addr[0] = pmk_r1_name;
1771 len[0] = WPA_PMK_NAME_LEN;
1772 addr[1] = (const u8 *) "FT-PTKN";
1773 len[1] = 7;
1774 addr[2] = snonce;
1775 len[2] = WPA_NONCE_LEN;
1776 addr[3] = anonce;
1777 len[3] = WPA_NONCE_LEN;
1778 addr[4] = bssid;
1779 len[4] = ETH_ALEN;
1780 addr[5] = sta_addr;
1781 len[5] = ETH_ALEN;
1782
1783 if (sha256_vector(6, addr, len, hash) < 0)
1784 return -1;
1785 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
1786
1787 os_memcpy(ptk->kck, tmp, ptk->kck_len);
1788 offset = ptk->kck_len;
1789 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len);
1790 offset += ptk->kek_len;
1791 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len);
1792 offset += ptk->tk_len;
1793 os_memcpy(ptk->kck2, tmp + offset, ptk->kck2_len);
1794 offset += ptk->kck2_len;
1795 os_memcpy(ptk->kek2, tmp + offset, ptk->kek2_len);
1796
1797 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len);
1798 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len);
1799 if (ptk->kck2_len)
1800 wpa_hexdump_key(MSG_DEBUG, "FT: KCK2",
1801 ptk->kck2, ptk->kck2_len);
1802 if (ptk->kek2_len)
1803 wpa_hexdump_key(MSG_DEBUG, "FT: KEK2",
1804 ptk->kek2, ptk->kek2_len);
1805 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len);
1806 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1807
1808 os_memset(tmp, 0, sizeof(tmp));
1809
1810 return 0;
1811 }
1812
1813 #endif /* CONFIG_IEEE80211R */
1814
1815
1816 /**
1817 * rsn_pmkid - Calculate PMK identifier
1818 * @pmk: Pairwise master key
1819 * @pmk_len: Length of pmk in bytes
1820 * @aa: Authenticator address
1821 * @spa: Supplicant address
1822 * @pmkid: Buffer for PMKID
1823 * @akmp: Negotiated key management protocol
1824 *
1825 * IEEE Std 802.11-2016 - 12.7.1.3 Pairwise key hierarchy
1826 * AKM: 00-0F-AC:5, 00-0F-AC:6, 00-0F-AC:14, 00-0F-AC:16
1827 * PMKID = Truncate-128(HMAC-SHA-256(PMK, "PMK Name" || AA || SPA))
1828 * AKM: 00-0F-AC:11
1829 * See rsn_pmkid_suite_b()
1830 * AKM: 00-0F-AC:12
1831 * See rsn_pmkid_suite_b_192()
1832 * AKM: 00-0F-AC:13, 00-0F-AC:15, 00-0F-AC:17
1833 * PMKID = Truncate-128(HMAC-SHA-384(PMK, "PMK Name" || AA || SPA))
1834 * Otherwise:
1835 * PMKID = Truncate-128(HMAC-SHA-1(PMK, "PMK Name" || AA || SPA))
1836 */
1837 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
1838 u8 *pmkid, int akmp)
1839 {
1840 char *title = "PMK Name";
1841 const u8 *addr[3];
1842 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1843 unsigned char hash[SHA384_MAC_LEN];
1844
1845 addr[0] = (u8 *) title;
1846 addr[1] = aa;
1847 addr[2] = spa;
1848
1849 if (0) {
1850 #if defined(CONFIG_FILS) || defined(CONFIG_SHA384)
1851 } else if (wpa_key_mgmt_sha384(akmp)) {
1852 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-384");
1853 hmac_sha384_vector(pmk, pmk_len, 3, addr, len, hash);
1854 #endif /* CONFIG_FILS || CONFIG_SHA384 */
1855 #if defined(CONFIG_IEEE80211W) || defined(CONFIG_FILS)
1856 } else if (wpa_key_mgmt_sha256(akmp)) {
1857 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-256");
1858 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
1859 #endif /* CONFIG_IEEE80211W || CONFIG_FILS */
1860 } else {
1861 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-1");
1862 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
1863 }
1864 wpa_hexdump(MSG_DEBUG, "RSN: Derived PMKID", hash, PMKID_LEN);
1865 os_memcpy(pmkid, hash, PMKID_LEN);
1866 }
1867
1868
1869 #ifdef CONFIG_SUITEB
1870 /**
1871 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM
1872 * @kck: Key confirmation key
1873 * @kck_len: Length of kck in bytes
1874 * @aa: Authenticator address
1875 * @spa: Supplicant address
1876 * @pmkid: Buffer for PMKID
1877 * Returns: 0 on success, -1 on failure
1878 *
1879 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1880 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA))
1881 */
1882 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa,
1883 const u8 *spa, u8 *pmkid)
1884 {
1885 char *title = "PMK Name";
1886 const u8 *addr[3];
1887 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1888 unsigned char hash[SHA256_MAC_LEN];
1889
1890 addr[0] = (u8 *) title;
1891 addr[1] = aa;
1892 addr[2] = spa;
1893
1894 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0)
1895 return -1;
1896 os_memcpy(pmkid, hash, PMKID_LEN);
1897 return 0;
1898 }
1899 #endif /* CONFIG_SUITEB */
1900
1901
1902 #ifdef CONFIG_SUITEB192
1903 /**
1904 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM
1905 * @kck: Key confirmation key
1906 * @kck_len: Length of kck in bytes
1907 * @aa: Authenticator address
1908 * @spa: Supplicant address
1909 * @pmkid: Buffer for PMKID
1910 * Returns: 0 on success, -1 on failure
1911 *
1912 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1913 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA))
1914 */
1915 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa,
1916 const u8 *spa, u8 *pmkid)
1917 {
1918 char *title = "PMK Name";
1919 const u8 *addr[3];
1920 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1921 unsigned char hash[SHA384_MAC_LEN];
1922
1923 addr[0] = (u8 *) title;
1924 addr[1] = aa;
1925 addr[2] = spa;
1926
1927 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0)
1928 return -1;
1929 os_memcpy(pmkid, hash, PMKID_LEN);
1930 return 0;
1931 }
1932 #endif /* CONFIG_SUITEB192 */
1933
1934
1935 /**
1936 * wpa_cipher_txt - Convert cipher suite to a text string
1937 * @cipher: Cipher suite (WPA_CIPHER_* enum)
1938 * Returns: Pointer to a text string of the cipher suite name
1939 */
1940 const char * wpa_cipher_txt(int cipher)
1941 {
1942 switch (cipher) {
1943 case WPA_CIPHER_NONE:
1944 return "NONE";
1945 case WPA_CIPHER_WEP40:
1946 return "WEP-40";
1947 case WPA_CIPHER_WEP104:
1948 return "WEP-104";
1949 case WPA_CIPHER_TKIP:
1950 return "TKIP";
1951 case WPA_CIPHER_CCMP:
1952 return "CCMP";
1953 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
1954 return "CCMP+TKIP";
1955 case WPA_CIPHER_GCMP:
1956 return "GCMP";
1957 case WPA_CIPHER_GCMP_256:
1958 return "GCMP-256";
1959 case WPA_CIPHER_CCMP_256:
1960 return "CCMP-256";
1961 case WPA_CIPHER_AES_128_CMAC:
1962 return "BIP";
1963 case WPA_CIPHER_BIP_GMAC_128:
1964 return "BIP-GMAC-128";
1965 case WPA_CIPHER_BIP_GMAC_256:
1966 return "BIP-GMAC-256";
1967 case WPA_CIPHER_BIP_CMAC_256:
1968 return "BIP-CMAC-256";
1969 case WPA_CIPHER_GTK_NOT_USED:
1970 return "GTK_NOT_USED";
1971 default:
1972 return "UNKNOWN";
1973 }
1974 }
1975
1976
1977 /**
1978 * wpa_key_mgmt_txt - Convert key management suite to a text string
1979 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
1980 * @proto: WPA/WPA2 version (WPA_PROTO_*)
1981 * Returns: Pointer to a text string of the key management suite name
1982 */
1983 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
1984 {
1985 switch (key_mgmt) {
1986 case WPA_KEY_MGMT_IEEE8021X:
1987 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1988 return "WPA2+WPA/IEEE 802.1X/EAP";
1989 return proto == WPA_PROTO_RSN ?
1990 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
1991 case WPA_KEY_MGMT_PSK:
1992 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1993 return "WPA2-PSK+WPA-PSK";
1994 return proto == WPA_PROTO_RSN ?
1995 "WPA2-PSK" : "WPA-PSK";
1996 case WPA_KEY_MGMT_NONE:
1997 return "NONE";
1998 case WPA_KEY_MGMT_WPA_NONE:
1999 return "WPA-NONE";
2000 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2001 return "IEEE 802.1X (no WPA)";
2002 #ifdef CONFIG_IEEE80211R
2003 case WPA_KEY_MGMT_FT_IEEE8021X:
2004 return "FT-EAP";
2005 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
2006 return "FT-EAP-SHA384";
2007 case WPA_KEY_MGMT_FT_PSK:
2008 return "FT-PSK";
2009 #endif /* CONFIG_IEEE80211R */
2010 #ifdef CONFIG_IEEE80211W
2011 case WPA_KEY_MGMT_IEEE8021X_SHA256:
2012 return "WPA2-EAP-SHA256";
2013 case WPA_KEY_MGMT_PSK_SHA256:
2014 return "WPA2-PSK-SHA256";
2015 #endif /* CONFIG_IEEE80211W */
2016 case WPA_KEY_MGMT_WPS:
2017 return "WPS";
2018 case WPA_KEY_MGMT_SAE:
2019 return "SAE";
2020 case WPA_KEY_MGMT_FT_SAE:
2021 return "FT-SAE";
2022 case WPA_KEY_MGMT_OSEN:
2023 return "OSEN";
2024 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
2025 return "WPA2-EAP-SUITE-B";
2026 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
2027 return "WPA2-EAP-SUITE-B-192";
2028 case WPA_KEY_MGMT_FILS_SHA256:
2029 return "FILS-SHA256";
2030 case WPA_KEY_MGMT_FILS_SHA384:
2031 return "FILS-SHA384";
2032 case WPA_KEY_MGMT_FT_FILS_SHA256:
2033 return "FT-FILS-SHA256";
2034 case WPA_KEY_MGMT_FT_FILS_SHA384:
2035 return "FT-FILS-SHA384";
2036 case WPA_KEY_MGMT_OWE:
2037 return "OWE";
2038 case WPA_KEY_MGMT_DPP:
2039 return "DPP";
2040 default:
2041 return "UNKNOWN";
2042 }
2043 }
2044
2045
2046 u32 wpa_akm_to_suite(int akm)
2047 {
2048 if (akm & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2049 return RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384;
2050 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
2051 return RSN_AUTH_KEY_MGMT_FT_802_1X;
2052 if (akm & WPA_KEY_MGMT_FT_PSK)
2053 return RSN_AUTH_KEY_MGMT_FT_PSK;
2054 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
2055 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
2056 if (akm & WPA_KEY_MGMT_IEEE8021X)
2057 return RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
2058 if (akm & WPA_KEY_MGMT_PSK_SHA256)
2059 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
2060 if (akm & WPA_KEY_MGMT_PSK)
2061 return RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
2062 if (akm & WPA_KEY_MGMT_CCKM)
2063 return RSN_AUTH_KEY_MGMT_CCKM;
2064 if (akm & WPA_KEY_MGMT_OSEN)
2065 return RSN_AUTH_KEY_MGMT_OSEN;
2066 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
2067 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
2068 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
2069 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
2070 if (akm & WPA_KEY_MGMT_FILS_SHA256)
2071 return RSN_AUTH_KEY_MGMT_FILS_SHA256;
2072 if (akm & WPA_KEY_MGMT_FILS_SHA384)
2073 return RSN_AUTH_KEY_MGMT_FILS_SHA384;
2074 if (akm & WPA_KEY_MGMT_FT_FILS_SHA256)
2075 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA256;
2076 if (akm & WPA_KEY_MGMT_FT_FILS_SHA384)
2077 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA384;
2078 return 0;
2079 }
2080
2081
2082 int wpa_compare_rsn_ie(int ft_initial_assoc,
2083 const u8 *ie1, size_t ie1len,
2084 const u8 *ie2, size_t ie2len)
2085 {
2086 if (ie1 == NULL || ie2 == NULL)
2087 return -1;
2088
2089 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
2090 return 0; /* identical IEs */
2091
2092 #ifdef CONFIG_IEEE80211R
2093 if (ft_initial_assoc) {
2094 struct wpa_ie_data ie1d, ie2d;
2095 /*
2096 * The PMKID-List in RSN IE is different between Beacon/Probe
2097 * Response/(Re)Association Request frames and EAPOL-Key
2098 * messages in FT initial mobility domain association. Allow
2099 * for this, but verify that other parts of the RSN IEs are
2100 * identical.
2101 */
2102 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
2103 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
2104 return -1;
2105 if (ie1d.proto == ie2d.proto &&
2106 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
2107 ie1d.group_cipher == ie2d.group_cipher &&
2108 ie1d.key_mgmt == ie2d.key_mgmt &&
2109 ie1d.capabilities == ie2d.capabilities &&
2110 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
2111 return 0;
2112 }
2113 #endif /* CONFIG_IEEE80211R */
2114
2115 return -1;
2116 }
2117
2118
2119 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_FILS)
2120 int wpa_insert_pmkid(u8 *ies, size_t *ies_len, const u8 *pmkid)
2121 {
2122 u8 *start, *end, *rpos, *rend;
2123 int added = 0;
2124
2125 start = ies;
2126 end = ies + *ies_len;
2127
2128 while (start < end) {
2129 if (*start == WLAN_EID_RSN)
2130 break;
2131 start += 2 + start[1];
2132 }
2133 if (start >= end) {
2134 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
2135 "IEs data");
2136 return -1;
2137 }
2138 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
2139 start, 2 + start[1]);
2140
2141 /* Find start of PMKID-Count */
2142 rpos = start + 2;
2143 rend = rpos + start[1];
2144
2145 /* Skip Version and Group Data Cipher Suite */
2146 rpos += 2 + 4;
2147 /* Skip Pairwise Cipher Suite Count and List */
2148 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
2149 /* Skip AKM Suite Count and List */
2150 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
2151
2152 if (rpos == rend) {
2153 /* Add RSN Capabilities */
2154 os_memmove(rpos + 2, rpos, end - rpos);
2155 *rpos++ = 0;
2156 *rpos++ = 0;
2157 added += 2;
2158 start[1] += 2;
2159 rend = rpos;
2160 } else {
2161 /* Skip RSN Capabilities */
2162 rpos += 2;
2163 if (rpos > rend) {
2164 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
2165 "IEs data");
2166 return -1;
2167 }
2168 }
2169
2170 if (rpos == rend) {
2171 /* No PMKID-Count field included; add it */
2172 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos);
2173 WPA_PUT_LE16(rpos, 1);
2174 rpos += 2;
2175 os_memcpy(rpos, pmkid, PMKID_LEN);
2176 added += 2 + PMKID_LEN;
2177 start[1] += 2 + PMKID_LEN;
2178 } else {
2179 u16 num_pmkid;
2180
2181 if (rend - rpos < 2)
2182 return -1;
2183 num_pmkid = WPA_GET_LE16(rpos);
2184 /* PMKID-Count was included; use it */
2185 if (num_pmkid != 0) {
2186 u8 *after;
2187
2188 if (num_pmkid * PMKID_LEN > rend - rpos - 2)
2189 return -1;
2190 /*
2191 * PMKID may have been included in RSN IE in
2192 * (Re)Association Request frame, so remove the old
2193 * PMKID(s) first before adding the new one.
2194 */
2195 wpa_printf(MSG_DEBUG,
2196 "FT: Remove %u old PMKID(s) from RSN IE",
2197 num_pmkid);
2198 after = rpos + 2 + num_pmkid * PMKID_LEN;
2199 os_memmove(rpos + 2, after, rend - after);
2200 start[1] -= num_pmkid * PMKID_LEN;
2201 added -= num_pmkid * PMKID_LEN;
2202 }
2203 WPA_PUT_LE16(rpos, 1);
2204 rpos += 2;
2205 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos);
2206 os_memcpy(rpos, pmkid, PMKID_LEN);
2207 added += PMKID_LEN;
2208 start[1] += PMKID_LEN;
2209 }
2210
2211 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
2212 "(PMKID inserted)", start, 2 + start[1]);
2213
2214 *ies_len += added;
2215
2216 return 0;
2217 }
2218 #endif /* CONFIG_IEEE80211R || CONFIG_FILS */
2219
2220
2221 int wpa_cipher_key_len(int cipher)
2222 {
2223 switch (cipher) {
2224 case WPA_CIPHER_CCMP_256:
2225 case WPA_CIPHER_GCMP_256:
2226 case WPA_CIPHER_BIP_GMAC_256:
2227 case WPA_CIPHER_BIP_CMAC_256:
2228 return 32;
2229 case WPA_CIPHER_CCMP:
2230 case WPA_CIPHER_GCMP:
2231 case WPA_CIPHER_AES_128_CMAC:
2232 case WPA_CIPHER_BIP_GMAC_128:
2233 return 16;
2234 case WPA_CIPHER_TKIP:
2235 return 32;
2236 }
2237
2238 return 0;
2239 }
2240
2241
2242 int wpa_cipher_rsc_len(int cipher)
2243 {
2244 switch (cipher) {
2245 case WPA_CIPHER_CCMP_256:
2246 case WPA_CIPHER_GCMP_256:
2247 case WPA_CIPHER_CCMP:
2248 case WPA_CIPHER_GCMP:
2249 case WPA_CIPHER_TKIP:
2250 return 6;
2251 }
2252
2253 return 0;
2254 }
2255
2256
2257 enum wpa_alg wpa_cipher_to_alg(int cipher)
2258 {
2259 switch (cipher) {
2260 case WPA_CIPHER_CCMP_256:
2261 return WPA_ALG_CCMP_256;
2262 case WPA_CIPHER_GCMP_256:
2263 return WPA_ALG_GCMP_256;
2264 case WPA_CIPHER_CCMP:
2265 return WPA_ALG_CCMP;
2266 case WPA_CIPHER_GCMP:
2267 return WPA_ALG_GCMP;
2268 case WPA_CIPHER_TKIP:
2269 return WPA_ALG_TKIP;
2270 case WPA_CIPHER_AES_128_CMAC:
2271 return WPA_ALG_IGTK;
2272 case WPA_CIPHER_BIP_GMAC_128:
2273 return WPA_ALG_BIP_GMAC_128;
2274 case WPA_CIPHER_BIP_GMAC_256:
2275 return WPA_ALG_BIP_GMAC_256;
2276 case WPA_CIPHER_BIP_CMAC_256:
2277 return WPA_ALG_BIP_CMAC_256;
2278 }
2279 return WPA_ALG_NONE;
2280 }
2281
2282
2283 int wpa_cipher_valid_pairwise(int cipher)
2284 {
2285 return cipher == WPA_CIPHER_CCMP_256 ||
2286 cipher == WPA_CIPHER_GCMP_256 ||
2287 cipher == WPA_CIPHER_CCMP ||
2288 cipher == WPA_CIPHER_GCMP ||
2289 cipher == WPA_CIPHER_TKIP;
2290 }
2291
2292
2293 u32 wpa_cipher_to_suite(int proto, int cipher)
2294 {
2295 if (cipher & WPA_CIPHER_CCMP_256)
2296 return RSN_CIPHER_SUITE_CCMP_256;
2297 if (cipher & WPA_CIPHER_GCMP_256)
2298 return RSN_CIPHER_SUITE_GCMP_256;
2299 if (cipher & WPA_CIPHER_CCMP)
2300 return (proto == WPA_PROTO_RSN ?
2301 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
2302 if (cipher & WPA_CIPHER_GCMP)
2303 return RSN_CIPHER_SUITE_GCMP;
2304 if (cipher & WPA_CIPHER_TKIP)
2305 return (proto == WPA_PROTO_RSN ?
2306 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
2307 if (cipher & WPA_CIPHER_NONE)
2308 return (proto == WPA_PROTO_RSN ?
2309 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
2310 if (cipher & WPA_CIPHER_GTK_NOT_USED)
2311 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
2312 if (cipher & WPA_CIPHER_AES_128_CMAC)
2313 return RSN_CIPHER_SUITE_AES_128_CMAC;
2314 if (cipher & WPA_CIPHER_BIP_GMAC_128)
2315 return RSN_CIPHER_SUITE_BIP_GMAC_128;
2316 if (cipher & WPA_CIPHER_BIP_GMAC_256)
2317 return RSN_CIPHER_SUITE_BIP_GMAC_256;
2318 if (cipher & WPA_CIPHER_BIP_CMAC_256)
2319 return RSN_CIPHER_SUITE_BIP_CMAC_256;
2320 return 0;
2321 }
2322
2323
2324 int rsn_cipher_put_suites(u8 *start, int ciphers)
2325 {
2326 u8 *pos = start;
2327
2328 if (ciphers & WPA_CIPHER_CCMP_256) {
2329 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
2330 pos += RSN_SELECTOR_LEN;
2331 }
2332 if (ciphers & WPA_CIPHER_GCMP_256) {
2333 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
2334 pos += RSN_SELECTOR_LEN;
2335 }
2336 if (ciphers & WPA_CIPHER_CCMP) {
2337 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
2338 pos += RSN_SELECTOR_LEN;
2339 }
2340 if (ciphers & WPA_CIPHER_GCMP) {
2341 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
2342 pos += RSN_SELECTOR_LEN;
2343 }
2344 if (ciphers & WPA_CIPHER_TKIP) {
2345 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
2346 pos += RSN_SELECTOR_LEN;
2347 }
2348 if (ciphers & WPA_CIPHER_NONE) {
2349 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
2350 pos += RSN_SELECTOR_LEN;
2351 }
2352
2353 return (pos - start) / RSN_SELECTOR_LEN;
2354 }
2355
2356
2357 int wpa_cipher_put_suites(u8 *start, int ciphers)
2358 {
2359 u8 *pos = start;
2360
2361 if (ciphers & WPA_CIPHER_CCMP) {
2362 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
2363 pos += WPA_SELECTOR_LEN;
2364 }
2365 if (ciphers & WPA_CIPHER_TKIP) {
2366 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
2367 pos += WPA_SELECTOR_LEN;
2368 }
2369 if (ciphers & WPA_CIPHER_NONE) {
2370 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
2371 pos += WPA_SELECTOR_LEN;
2372 }
2373
2374 return (pos - start) / RSN_SELECTOR_LEN;
2375 }
2376
2377
2378 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
2379 {
2380 if (ciphers & WPA_CIPHER_CCMP_256)
2381 return WPA_CIPHER_CCMP_256;
2382 if (ciphers & WPA_CIPHER_GCMP_256)
2383 return WPA_CIPHER_GCMP_256;
2384 if (ciphers & WPA_CIPHER_CCMP)
2385 return WPA_CIPHER_CCMP;
2386 if (ciphers & WPA_CIPHER_GCMP)
2387 return WPA_CIPHER_GCMP;
2388 if (ciphers & WPA_CIPHER_TKIP)
2389 return WPA_CIPHER_TKIP;
2390 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
2391 return WPA_CIPHER_NONE;
2392 return -1;
2393 }
2394
2395
2396 int wpa_pick_group_cipher(int ciphers)
2397 {
2398 if (ciphers & WPA_CIPHER_CCMP_256)
2399 return WPA_CIPHER_CCMP_256;
2400 if (ciphers & WPA_CIPHER_GCMP_256)
2401 return WPA_CIPHER_GCMP_256;
2402 if (ciphers & WPA_CIPHER_CCMP)
2403 return WPA_CIPHER_CCMP;
2404 if (ciphers & WPA_CIPHER_GCMP)
2405 return WPA_CIPHER_GCMP;
2406 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
2407 return WPA_CIPHER_GTK_NOT_USED;
2408 if (ciphers & WPA_CIPHER_TKIP)
2409 return WPA_CIPHER_TKIP;
2410 return -1;
2411 }
2412
2413
2414 int wpa_parse_cipher(const char *value)
2415 {
2416 int val = 0, last;
2417 char *start, *end, *buf;
2418
2419 buf = os_strdup(value);
2420 if (buf == NULL)
2421 return -1;
2422 start = buf;
2423
2424 while (*start != '\0') {
2425 while (*start == ' ' || *start == '\t')
2426 start++;
2427 if (*start == '\0')
2428 break;
2429 end = start;
2430 while (*end != ' ' && *end != '\t' && *end != '\0')
2431 end++;
2432 last = *end == '\0';
2433 *end = '\0';
2434 if (os_strcmp(start, "CCMP-256") == 0)
2435 val |= WPA_CIPHER_CCMP_256;
2436 else if (os_strcmp(start, "GCMP-256") == 0)
2437 val |= WPA_CIPHER_GCMP_256;
2438 else if (os_strcmp(start, "CCMP") == 0)
2439 val |= WPA_CIPHER_CCMP;
2440 else if (os_strcmp(start, "GCMP") == 0)
2441 val |= WPA_CIPHER_GCMP;
2442 else if (os_strcmp(start, "TKIP") == 0)
2443 val |= WPA_CIPHER_TKIP;
2444 else if (os_strcmp(start, "WEP104") == 0)
2445 val |= WPA_CIPHER_WEP104;
2446 else if (os_strcmp(start, "WEP40") == 0)
2447 val |= WPA_CIPHER_WEP40;
2448 else if (os_strcmp(start, "NONE") == 0)
2449 val |= WPA_CIPHER_NONE;
2450 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
2451 val |= WPA_CIPHER_GTK_NOT_USED;
2452 else if (os_strcmp(start, "AES-128-CMAC") == 0)
2453 val |= WPA_CIPHER_AES_128_CMAC;
2454 else if (os_strcmp(start, "BIP-GMAC-128") == 0)
2455 val |= WPA_CIPHER_BIP_GMAC_128;
2456 else if (os_strcmp(start, "BIP-GMAC-256") == 0)
2457 val |= WPA_CIPHER_BIP_GMAC_256;
2458 else if (os_strcmp(start, "BIP-CMAC-256") == 0)
2459 val |= WPA_CIPHER_BIP_CMAC_256;
2460 else {
2461 os_free(buf);
2462 return -1;
2463 }
2464
2465 if (last)
2466 break;
2467 start = end + 1;
2468 }
2469 os_free(buf);
2470
2471 return val;
2472 }
2473
2474
2475 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
2476 {
2477 char *pos = start;
2478 int ret;
2479
2480 if (ciphers & WPA_CIPHER_CCMP_256) {
2481 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
2482 pos == start ? "" : delim);
2483 if (os_snprintf_error(end - pos, ret))
2484 return -1;
2485 pos += ret;
2486 }
2487 if (ciphers & WPA_CIPHER_GCMP_256) {
2488 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
2489 pos == start ? "" : delim);
2490 if (os_snprintf_error(end - pos, ret))
2491 return -1;
2492 pos += ret;
2493 }
2494 if (ciphers & WPA_CIPHER_CCMP) {
2495 ret = os_snprintf(pos, end - pos, "%sCCMP",
2496 pos == start ? "" : delim);
2497 if (os_snprintf_error(end - pos, ret))
2498 return -1;
2499 pos += ret;
2500 }
2501 if (ciphers & WPA_CIPHER_GCMP) {
2502 ret = os_snprintf(pos, end - pos, "%sGCMP",
2503 pos == start ? "" : delim);
2504 if (os_snprintf_error(end - pos, ret))
2505 return -1;
2506 pos += ret;
2507 }
2508 if (ciphers & WPA_CIPHER_TKIP) {
2509 ret = os_snprintf(pos, end - pos, "%sTKIP",
2510 pos == start ? "" : delim);
2511 if (os_snprintf_error(end - pos, ret))
2512 return -1;
2513 pos += ret;
2514 }
2515 if (ciphers & WPA_CIPHER_AES_128_CMAC) {
2516 ret = os_snprintf(pos, end - pos, "%sAES-128-CMAC",
2517 pos == start ? "" : delim);
2518 if (os_snprintf_error(end - pos, ret))
2519 return -1;
2520 pos += ret;
2521 }
2522 if (ciphers & WPA_CIPHER_BIP_GMAC_128) {
2523 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-128",
2524 pos == start ? "" : delim);
2525 if (os_snprintf_error(end - pos, ret))
2526 return -1;
2527 pos += ret;
2528 }
2529 if (ciphers & WPA_CIPHER_BIP_GMAC_256) {
2530 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-256",
2531 pos == start ? "" : delim);
2532 if (os_snprintf_error(end - pos, ret))
2533 return -1;
2534 pos += ret;
2535 }
2536 if (ciphers & WPA_CIPHER_BIP_CMAC_256) {
2537 ret = os_snprintf(pos, end - pos, "%sBIP-CMAC-256",
2538 pos == start ? "" : delim);
2539 if (os_snprintf_error(end - pos, ret))
2540 return -1;
2541 pos += ret;
2542 }
2543 if (ciphers & WPA_CIPHER_NONE) {
2544 ret = os_snprintf(pos, end - pos, "%sNONE",
2545 pos == start ? "" : delim);
2546 if (os_snprintf_error(end - pos, ret))
2547 return -1;
2548 pos += ret;
2549 }
2550
2551 return pos - start;
2552 }
2553
2554
2555 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
2556 {
2557 int pairwise = 0;
2558
2559 /* Select group cipher based on the enabled pairwise cipher suites */
2560 if (wpa & 1)
2561 pairwise |= wpa_pairwise;
2562 if (wpa & 2)
2563 pairwise |= rsn_pairwise;
2564
2565 if (pairwise & WPA_CIPHER_TKIP)
2566 return WPA_CIPHER_TKIP;
2567 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
2568 return WPA_CIPHER_GCMP;
2569 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
2570 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
2571 return WPA_CIPHER_GCMP_256;
2572 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
2573 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
2574 return WPA_CIPHER_CCMP_256;
2575 return WPA_CIPHER_CCMP;
2576 }
2577
2578
2579 #ifdef CONFIG_FILS
2580 int fils_domain_name_hash(const char *domain, u8 *hash)
2581 {
2582 char buf[255], *wpos = buf;
2583 const char *pos = domain;
2584 size_t len;
2585 const u8 *addr[1];
2586 u8 mac[SHA256_MAC_LEN];
2587
2588 for (len = 0; len < sizeof(buf) && *pos; len++) {
2589 if (isalpha(*pos) && isupper(*pos))
2590 *wpos++ = tolower(*pos);
2591 else
2592 *wpos++ = *pos;
2593 pos++;
2594 }
2595
2596 addr[0] = (const u8 *) buf;
2597 if (sha256_vector(1, addr, &len, mac) < 0)
2598 return -1;
2599 os_memcpy(hash, mac, 2);
2600 return 0;
2601 }
2602 #endif /* CONFIG_FILS */
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