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 "ieee802_11_common.h"
21 #include "defs.h"
22 #include "wpa_common.h"
23
24
wpa_kck_len(int akmp,size_t pmk_len)25 static unsigned int wpa_kck_len(int akmp, size_t pmk_len)
26 {
27 switch (akmp) {
28 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
29 case WPA_KEY_MGMT_IEEE8021X_SHA384:
30 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
31 return 24;
32 case WPA_KEY_MGMT_FILS_SHA256:
33 case WPA_KEY_MGMT_FT_FILS_SHA256:
34 case WPA_KEY_MGMT_FILS_SHA384:
35 case WPA_KEY_MGMT_FT_FILS_SHA384:
36 return 0;
37 case WPA_KEY_MGMT_DPP:
38 return pmk_len / 2;
39 case WPA_KEY_MGMT_OWE:
40 return pmk_len / 2;
41 case WPA_KEY_MGMT_SAE_EXT_KEY:
42 case WPA_KEY_MGMT_FT_SAE_EXT_KEY:
43 return pmk_len / 2;
44 default:
45 return 16;
46 }
47 }
48
49
50 #ifdef CONFIG_IEEE80211R
wpa_kck2_len(int akmp)51 static unsigned int wpa_kck2_len(int akmp)
52 {
53 switch (akmp) {
54 case WPA_KEY_MGMT_FT_FILS_SHA256:
55 return 16;
56 case WPA_KEY_MGMT_FT_FILS_SHA384:
57 return 24;
58 default:
59 return 0;
60 }
61 }
62 #endif /* CONFIG_IEEE80211R */
63
64
wpa_kek_len(int akmp,size_t pmk_len)65 static unsigned int wpa_kek_len(int akmp, size_t pmk_len)
66 {
67 switch (akmp) {
68 case WPA_KEY_MGMT_FILS_SHA384:
69 case WPA_KEY_MGMT_FT_FILS_SHA384:
70 return 64;
71 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
72 case WPA_KEY_MGMT_FILS_SHA256:
73 case WPA_KEY_MGMT_FT_FILS_SHA256:
74 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
75 case WPA_KEY_MGMT_IEEE8021X_SHA384:
76 return 32;
77 case WPA_KEY_MGMT_DPP:
78 return pmk_len <= 32 ? 16 : 32;
79 case WPA_KEY_MGMT_OWE:
80 return pmk_len <= 32 ? 16 : 32;
81 case WPA_KEY_MGMT_SAE_EXT_KEY:
82 case WPA_KEY_MGMT_FT_SAE_EXT_KEY:
83 return pmk_len <= 32 ? 16 : 32;
84 default:
85 return 16;
86 }
87 }
88
89
90 #ifdef CONFIG_IEEE80211R
wpa_kek2_len(int akmp)91 static unsigned int wpa_kek2_len(int akmp)
92 {
93 switch (akmp) {
94 case WPA_KEY_MGMT_FT_FILS_SHA256:
95 return 16;
96 case WPA_KEY_MGMT_FT_FILS_SHA384:
97 return 32;
98 default:
99 return 0;
100 }
101 }
102 #endif /* CONFIG_IEEE80211R */
103
104
wpa_mic_len(int akmp,size_t pmk_len)105 unsigned int wpa_mic_len(int akmp, size_t pmk_len)
106 {
107 switch (akmp) {
108 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
109 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
110 case WPA_KEY_MGMT_IEEE8021X_SHA384:
111 return 24;
112 case WPA_KEY_MGMT_FILS_SHA256:
113 case WPA_KEY_MGMT_FILS_SHA384:
114 case WPA_KEY_MGMT_FT_FILS_SHA256:
115 case WPA_KEY_MGMT_FT_FILS_SHA384:
116 return 0;
117 case WPA_KEY_MGMT_DPP:
118 return pmk_len / 2;
119 case WPA_KEY_MGMT_OWE:
120 return pmk_len / 2;
121 case WPA_KEY_MGMT_SAE_EXT_KEY:
122 case WPA_KEY_MGMT_FT_SAE_EXT_KEY:
123 return pmk_len / 2;
124 default:
125 return 16;
126 }
127 }
128
129
130 /**
131 * wpa_use_akm_defined - Is AKM-defined Key Descriptor Version used
132 * @akmp: WPA_KEY_MGMT_* used in key derivation
133 * Returns: 1 if AKM-defined Key Descriptor Version is used; 0 otherwise
134 */
wpa_use_akm_defined(int akmp)135 int wpa_use_akm_defined(int akmp)
136 {
137 return akmp == WPA_KEY_MGMT_OSEN ||
138 akmp == WPA_KEY_MGMT_OWE ||
139 akmp == WPA_KEY_MGMT_DPP ||
140 akmp == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 ||
141 akmp == WPA_KEY_MGMT_IEEE8021X_SHA384 ||
142 wpa_key_mgmt_sae(akmp) ||
143 wpa_key_mgmt_suite_b(akmp) ||
144 wpa_key_mgmt_fils(akmp);
145 }
146
147
148 /**
149 * wpa_use_cmac - Is CMAC integrity algorithm used for EAPOL-Key MIC
150 * @akmp: WPA_KEY_MGMT_* used in key derivation
151 * Returns: 1 if CMAC is used; 0 otherwise
152 */
wpa_use_cmac(int akmp)153 int wpa_use_cmac(int akmp)
154 {
155 return akmp == WPA_KEY_MGMT_OSEN ||
156 akmp == WPA_KEY_MGMT_OWE ||
157 akmp == WPA_KEY_MGMT_DPP ||
158 wpa_key_mgmt_ft(akmp) ||
159 wpa_key_mgmt_sha256(akmp) ||
160 (wpa_key_mgmt_sae(akmp) &&
161 !wpa_key_mgmt_sae_ext_key(akmp)) ||
162 wpa_key_mgmt_suite_b(akmp);
163 }
164
165
166 /**
167 * wpa_use_aes_key_wrap - Is AES Keywrap algorithm used for EAPOL-Key Key Data
168 * @akmp: WPA_KEY_MGMT_* used in key derivation
169 * Returns: 1 if AES Keywrap is used; 0 otherwise
170 *
171 * Note: AKM 00-0F-AC:1 and 00-0F-AC:2 have special rules for selecting whether
172 * to use AES Keywrap based on the negotiated pairwise cipher. This function
173 * does not cover those special cases.
174 */
wpa_use_aes_key_wrap(int akmp)175 int wpa_use_aes_key_wrap(int akmp)
176 {
177 return akmp == WPA_KEY_MGMT_OSEN ||
178 akmp == WPA_KEY_MGMT_OWE ||
179 akmp == WPA_KEY_MGMT_DPP ||
180 akmp == WPA_KEY_MGMT_IEEE8021X_SHA384 ||
181 wpa_key_mgmt_ft(akmp) ||
182 wpa_key_mgmt_sha256(akmp) ||
183 wpa_key_mgmt_sae(akmp) ||
184 wpa_key_mgmt_suite_b(akmp);
185 }
186
187
188 /**
189 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
190 * @key: EAPOL-Key Key Confirmation Key (KCK)
191 * @key_len: KCK length in octets
192 * @akmp: WPA_KEY_MGMT_* used in key derivation
193 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
194 * @buf: Pointer to the beginning of the EAPOL header (version field)
195 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
196 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
197 * Returns: 0 on success, -1 on failure
198 *
199 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
200 * to be cleared (all zeroes) when calling this function.
201 *
202 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
203 * description of the Key MIC calculation. It includes packet data from the
204 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
205 * happened during final editing of the standard and the correct behavior is
206 * defined in the last draft (IEEE 802.11i/D10).
207 */
wpa_eapol_key_mic(const u8 * key,size_t key_len,int akmp,int ver,const u8 * buf,size_t len,u8 * mic)208 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
209 const u8 *buf, size_t len, u8 *mic)
210 {
211 u8 hash[SHA512_MAC_LEN];
212
213 if (key_len == 0) {
214 wpa_printf(MSG_DEBUG,
215 "WPA: KCK not set - cannot calculate MIC");
216 return -1;
217 }
218
219 switch (ver) {
220 #ifndef CONFIG_FIPS
221 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
222 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-MD5");
223 return hmac_md5(key, key_len, buf, len, mic);
224 #endif /* CONFIG_FIPS */
225 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
226 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA1");
227 if (hmac_sha1(key, key_len, buf, len, hash))
228 return -1;
229 os_memcpy(mic, hash, MD5_MAC_LEN);
230 break;
231 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
232 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC");
233 return omac1_aes_128(key, buf, len, mic);
234 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
235 switch (akmp) {
236 #ifdef CONFIG_SAE
237 case WPA_KEY_MGMT_SAE:
238 case WPA_KEY_MGMT_FT_SAE:
239 wpa_printf(MSG_DEBUG,
240 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - SAE)");
241 return omac1_aes_128(key, buf, len, mic);
242 case WPA_KEY_MGMT_SAE_EXT_KEY:
243 case WPA_KEY_MGMT_FT_SAE_EXT_KEY:
244 wpa_printf(MSG_DEBUG,
245 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - SAE-EXT-KEY)",
246 (unsigned int) key_len * 8 * 2);
247 if (key_len == 128 / 8) {
248 if (hmac_sha256(key, key_len, buf, len, hash))
249 return -1;
250 #ifdef CONFIG_SHA384
251 } else if (key_len == 192 / 8) {
252 if (hmac_sha384(key, key_len, buf, len, hash))
253 return -1;
254 #endif /* CONFIG_SHA384 */
255 #ifdef CONFIG_SHA512
256 } else if (key_len == 256 / 8) {
257 if (hmac_sha512(key, key_len, buf, len, hash))
258 return -1;
259 #endif /* CONFIG_SHA512 */
260 } else {
261 wpa_printf(MSG_INFO,
262 "SAE: Unsupported KCK length: %u",
263 (unsigned int) key_len);
264 return -1;
265 }
266 os_memcpy(mic, hash, key_len);
267 break;
268 #endif /* CONFIG_SAE */
269 #ifdef CONFIG_HS20
270 case WPA_KEY_MGMT_OSEN:
271 wpa_printf(MSG_DEBUG,
272 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - OSEN)");
273 return omac1_aes_128(key, buf, len, mic);
274 #endif /* CONFIG_HS20 */
275 #ifdef CONFIG_SUITEB
276 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
277 wpa_printf(MSG_DEBUG,
278 "WPA: EAPOL-Key MIC using HMAC-SHA256 (AKM-defined - Suite B)");
279 if (hmac_sha256(key, key_len, buf, len, hash))
280 return -1;
281 os_memcpy(mic, hash, MD5_MAC_LEN);
282 break;
283 #endif /* CONFIG_SUITEB */
284 #ifdef CONFIG_SUITEB192
285 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
286 wpa_printf(MSG_DEBUG,
287 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - Suite B 192-bit)");
288 if (hmac_sha384(key, key_len, buf, len, hash))
289 return -1;
290 os_memcpy(mic, hash, 24);
291 break;
292 #endif /* CONFIG_SUITEB192 */
293 #ifdef CONFIG_OWE
294 case WPA_KEY_MGMT_OWE:
295 wpa_printf(MSG_DEBUG,
296 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - OWE)",
297 (unsigned int) key_len * 8 * 2);
298 if (key_len == 128 / 8) {
299 if (hmac_sha256(key, key_len, buf, len, hash))
300 return -1;
301 } else if (key_len == 192 / 8) {
302 if (hmac_sha384(key, key_len, buf, len, hash))
303 return -1;
304 } else if (key_len == 256 / 8) {
305 if (hmac_sha512(key, key_len, buf, len, hash))
306 return -1;
307 } else {
308 wpa_printf(MSG_INFO,
309 "OWE: Unsupported KCK length: %u",
310 (unsigned int) key_len);
311 return -1;
312 }
313 os_memcpy(mic, hash, key_len);
314 break;
315 #endif /* CONFIG_OWE */
316 #ifdef CONFIG_DPP
317 case WPA_KEY_MGMT_DPP:
318 wpa_printf(MSG_DEBUG,
319 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - DPP)",
320 (unsigned int) key_len * 8 * 2);
321 if (key_len == 128 / 8) {
322 if (hmac_sha256(key, key_len, buf, len, hash))
323 return -1;
324 } else if (key_len == 192 / 8) {
325 if (hmac_sha384(key, key_len, buf, len, hash))
326 return -1;
327 } else if (key_len == 256 / 8) {
328 if (hmac_sha512(key, key_len, buf, len, hash))
329 return -1;
330 } else {
331 wpa_printf(MSG_INFO,
332 "DPP: Unsupported KCK length: %u",
333 (unsigned int) key_len);
334 return -1;
335 }
336 os_memcpy(mic, hash, key_len);
337 break;
338 #endif /* CONFIG_DPP */
339 #ifdef CONFIG_SHA384
340 case WPA_KEY_MGMT_IEEE8021X_SHA384:
341 #ifdef CONFIG_IEEE80211R
342 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
343 #endif /* CONFIG_IEEE80211R */
344 wpa_printf(MSG_DEBUG,
345 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - 802.1X SHA384)");
346 if (hmac_sha384(key, key_len, buf, len, hash))
347 return -1;
348 os_memcpy(mic, hash, 24);
349 break;
350 #endif /* CONFIG_SHA384 */
351 default:
352 wpa_printf(MSG_DEBUG,
353 "WPA: EAPOL-Key MIC algorithm not known (AKM-defined - akmp=0x%x)",
354 akmp);
355 return -1;
356 }
357 break;
358 default:
359 wpa_printf(MSG_DEBUG,
360 "WPA: EAPOL-Key MIC algorithm not known (ver=%d)",
361 ver);
362 return -1;
363 }
364
365 return 0;
366 }
367
368
369 /**
370 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
371 * @pmk: Pairwise master key
372 * @pmk_len: Length of PMK
373 * @label: Label to use in derivation
374 * @addr1: AA or SA
375 * @addr2: SA or AA
376 * @nonce1: ANonce or SNonce
377 * @nonce2: SNonce or ANonce
378 * @ptk: Buffer for pairwise transient key
379 * @akmp: Negotiated AKM
380 * @cipher: Negotiated pairwise cipher
381 * @kdk_len: The length in octets that should be derived for KDK
382 * Returns: 0 on success, -1 on failure
383 *
384 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
385 * PTK = PRF-X(PMK, "Pairwise key expansion",
386 * Min(AA, SA) || Max(AA, SA) ||
387 * Min(ANonce, SNonce) || Max(ANonce, SNonce)
388 * [ || Z.x ])
389 *
390 * The optional Z.x component is used only with DPP and that part is not defined
391 * in IEEE 802.11.
392 */
wpa_pmk_to_ptk(const u8 * pmk,size_t pmk_len,const char * label,const u8 * addr1,const u8 * addr2,const u8 * nonce1,const u8 * nonce2,struct wpa_ptk * ptk,int akmp,int cipher,const u8 * z,size_t z_len,size_t kdk_len)393 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
394 const u8 *addr1, const u8 *addr2,
395 const u8 *nonce1, const u8 *nonce2,
396 struct wpa_ptk *ptk, int akmp, int cipher,
397 const u8 *z, size_t z_len, size_t kdk_len)
398 {
399 #define MAX_Z_LEN 66 /* with NIST P-521 */
400 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN];
401 size_t data_len = 2 * ETH_ALEN + 2 * WPA_NONCE_LEN;
402 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
403 WPA_KDK_MAX_LEN];
404 size_t ptk_len;
405 #ifdef CONFIG_OWE
406 int owe_ptk_workaround = 0;
407
408 if (akmp == (WPA_KEY_MGMT_OWE | WPA_KEY_MGMT_PSK_SHA256)) {
409 owe_ptk_workaround = 1;
410 akmp = WPA_KEY_MGMT_OWE;
411 }
412 #endif /* CONFIG_OWE */
413
414 if (pmk_len == 0) {
415 wpa_printf(MSG_ERROR, "WPA: No PMK set for PTK derivation");
416 return -1;
417 }
418
419 if (z_len > MAX_Z_LEN)
420 return -1;
421
422 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
423 os_memcpy(data, addr1, ETH_ALEN);
424 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
425 } else {
426 os_memcpy(data, addr2, ETH_ALEN);
427 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
428 }
429
430 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
431 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
432 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
433 WPA_NONCE_LEN);
434 } else {
435 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
436 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
437 WPA_NONCE_LEN);
438 }
439
440 if (z && z_len) {
441 os_memcpy(data + 2 * ETH_ALEN + 2 * WPA_NONCE_LEN, z, z_len);
442 data_len += z_len;
443 }
444
445 if (kdk_len > WPA_KDK_MAX_LEN) {
446 wpa_printf(MSG_ERROR,
447 "WPA: KDK len=%zu exceeds max supported len",
448 kdk_len);
449 return -1;
450 }
451
452 ptk->kck_len = wpa_kck_len(akmp, pmk_len);
453 ptk->kek_len = wpa_kek_len(akmp, pmk_len);
454 ptk->tk_len = wpa_cipher_key_len(cipher);
455 ptk->kdk_len = kdk_len;
456 if (ptk->tk_len == 0) {
457 wpa_printf(MSG_ERROR,
458 "WPA: Unsupported cipher (0x%x) used in PTK derivation",
459 cipher);
460 return -1;
461 }
462 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + ptk->kdk_len;
463
464 if (wpa_key_mgmt_sha384(akmp)) {
465 #ifdef CONFIG_SHA384
466 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
467 if (sha384_prf(pmk, pmk_len, label, data, data_len,
468 tmp, ptk_len) < 0)
469 return -1;
470 #else /* CONFIG_SHA384 */
471 return -1;
472 #endif /* CONFIG_SHA384 */
473 } else if (wpa_key_mgmt_sha256(akmp)) {
474 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
475 if (sha256_prf(pmk, pmk_len, label, data, data_len,
476 tmp, ptk_len) < 0)
477 return -1;
478 #ifdef CONFIG_OWE
479 } else if (akmp == WPA_KEY_MGMT_OWE && (pmk_len == 32 ||
480 owe_ptk_workaround)) {
481 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
482 if (sha256_prf(pmk, pmk_len, label, data, data_len,
483 tmp, ptk_len) < 0)
484 return -1;
485 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 48) {
486 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
487 if (sha384_prf(pmk, pmk_len, label, data, data_len,
488 tmp, ptk_len) < 0)
489 return -1;
490 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 64) {
491 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)");
492 if (sha512_prf(pmk, pmk_len, label, data, data_len,
493 tmp, ptk_len) < 0)
494 return -1;
495 } else if (akmp == WPA_KEY_MGMT_OWE) {
496 wpa_printf(MSG_INFO, "OWE: Unknown PMK length %u",
497 (unsigned int) pmk_len);
498 return -1;
499 #endif /* CONFIG_OWE */
500 #ifdef CONFIG_DPP
501 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 32) {
502 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
503 if (sha256_prf(pmk, pmk_len, label, data, data_len,
504 tmp, ptk_len) < 0)
505 return -1;
506 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 48) {
507 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
508 if (sha384_prf(pmk, pmk_len, label, data, data_len,
509 tmp, ptk_len) < 0)
510 return -1;
511 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 64) {
512 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)");
513 if (sha512_prf(pmk, pmk_len, label, data, data_len,
514 tmp, ptk_len) < 0)
515 return -1;
516 } else if (akmp == WPA_KEY_MGMT_DPP) {
517 wpa_printf(MSG_INFO, "DPP: Unknown PMK length %u",
518 (unsigned int) pmk_len);
519 return -1;
520 #endif /* CONFIG_DPP */
521 #ifdef CONFIG_SAE
522 } else if (wpa_key_mgmt_sae_ext_key(akmp)) {
523 if (pmk_len == 32) {
524 wpa_printf(MSG_DEBUG,
525 "SAE: PTK derivation using PRF(SHA256)");
526 if (sha256_prf(pmk, pmk_len, label, data, data_len,
527 tmp, ptk_len) < 0)
528 return -1;
529 #ifdef CONFIG_SHA384
530 } else if (pmk_len == 48) {
531 wpa_printf(MSG_DEBUG,
532 "SAE: PTK derivation using PRF(SHA384)");
533 if (sha384_prf(pmk, pmk_len, label, data, data_len,
534 tmp, ptk_len) < 0)
535 return -1;
536 #endif /* CONFIG_SHA384 */
537 #ifdef CONFIG_SHA512
538 } else if (pmk_len == 64) {
539 wpa_printf(MSG_DEBUG,
540 "SAE: PTK derivation using PRF(SHA512)");
541 if (sha512_prf(pmk, pmk_len, label, data, data_len,
542 tmp, ptk_len) < 0)
543 return -1;
544 #endif /* CONFIG_SHA512 */
545 } else {
546 wpa_printf(MSG_INFO, "SAE: Unknown PMK length %u",
547 (unsigned int) pmk_len);
548 return -1;
549 }
550 #endif /* CONFIG_SAE */
551 } else {
552 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA1)");
553 if (sha1_prf(pmk, pmk_len, label, data, data_len, tmp,
554 ptk_len) < 0)
555 return -1;
556 }
557
558 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
559 MAC2STR(addr1), MAC2STR(addr2));
560 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
561 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
562 if (z && z_len)
563 wpa_hexdump_key(MSG_DEBUG, "WPA: Z.x", z, z_len);
564 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
565 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len);
566
567 os_memcpy(ptk->kck, tmp, ptk->kck_len);
568 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len);
569
570 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
571 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
572
573 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
574 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
575
576 if (kdk_len) {
577 os_memcpy(ptk->kdk, tmp + ptk->kck_len + ptk->kek_len +
578 ptk->tk_len, ptk->kdk_len);
579 wpa_hexdump_key(MSG_DEBUG, "WPA: KDK", ptk->kdk, ptk->kdk_len);
580 }
581
582 ptk->kek2_len = 0;
583 ptk->kck2_len = 0;
584
585 os_memset(tmp, 0, sizeof(tmp));
586 os_memset(data, 0, data_len);
587 return 0;
588 }
589
590 #ifdef CONFIG_FILS
591
fils_rmsk_to_pmk(int akmp,const u8 * rmsk,size_t rmsk_len,const u8 * snonce,const u8 * anonce,const u8 * dh_ss,size_t dh_ss_len,u8 * pmk,size_t * pmk_len)592 int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len,
593 const u8 *snonce, const u8 *anonce, const u8 *dh_ss,
594 size_t dh_ss_len, u8 *pmk, size_t *pmk_len)
595 {
596 u8 nonces[2 * FILS_NONCE_LEN];
597 const u8 *addr[2];
598 size_t len[2];
599 size_t num_elem;
600 int res;
601
602 /* PMK = HMAC-Hash(SNonce || ANonce, rMSK [ || DHss ]) */
603 wpa_printf(MSG_DEBUG, "FILS: rMSK to PMK derivation");
604
605 if (wpa_key_mgmt_sha384(akmp))
606 *pmk_len = SHA384_MAC_LEN;
607 else if (wpa_key_mgmt_sha256(akmp))
608 *pmk_len = SHA256_MAC_LEN;
609 else
610 return -1;
611
612 wpa_hexdump_key(MSG_DEBUG, "FILS: rMSK", rmsk, rmsk_len);
613 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
614 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
615 wpa_hexdump(MSG_DEBUG, "FILS: DHss", dh_ss, dh_ss_len);
616
617 os_memcpy(nonces, snonce, FILS_NONCE_LEN);
618 os_memcpy(&nonces[FILS_NONCE_LEN], anonce, FILS_NONCE_LEN);
619 addr[0] = rmsk;
620 len[0] = rmsk_len;
621 num_elem = 1;
622 if (dh_ss) {
623 addr[1] = dh_ss;
624 len[1] = dh_ss_len;
625 num_elem++;
626 }
627 if (wpa_key_mgmt_sha384(akmp))
628 res = hmac_sha384_vector(nonces, 2 * FILS_NONCE_LEN, num_elem,
629 addr, len, pmk);
630 else
631 res = hmac_sha256_vector(nonces, 2 * FILS_NONCE_LEN, num_elem,
632 addr, len, pmk);
633 if (res == 0)
634 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, *pmk_len);
635 else
636 *pmk_len = 0;
637 return res;
638 }
639
640
fils_pmkid_erp(int akmp,const u8 * reauth,size_t reauth_len,u8 * pmkid)641 int fils_pmkid_erp(int akmp, const u8 *reauth, size_t reauth_len,
642 u8 *pmkid)
643 {
644 const u8 *addr[1];
645 size_t len[1];
646 u8 hash[SHA384_MAC_LEN];
647 int res;
648
649 /* PMKID = Truncate-128(Hash(EAP-Initiate/Reauth)) */
650 addr[0] = reauth;
651 len[0] = reauth_len;
652 if (wpa_key_mgmt_sha384(akmp))
653 res = sha384_vector(1, addr, len, hash);
654 else if (wpa_key_mgmt_sha256(akmp))
655 res = sha256_vector(1, addr, len, hash);
656 else
657 return -1;
658 if (res)
659 return res;
660 os_memcpy(pmkid, hash, PMKID_LEN);
661 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
662 return 0;
663 }
664
665
fils_pmk_to_ptk(const u8 * pmk,size_t pmk_len,const u8 * spa,const u8 * aa,const u8 * snonce,const u8 * anonce,const u8 * dhss,size_t dhss_len,struct wpa_ptk * ptk,u8 * ick,size_t * ick_len,int akmp,int cipher,u8 * fils_ft,size_t * fils_ft_len,size_t kdk_len)666 int fils_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const u8 *spa, const u8 *aa,
667 const u8 *snonce, const u8 *anonce, const u8 *dhss,
668 size_t dhss_len, struct wpa_ptk *ptk,
669 u8 *ick, size_t *ick_len, int akmp, int cipher,
670 u8 *fils_ft, size_t *fils_ft_len, size_t kdk_len)
671 {
672 u8 *data, *pos;
673 size_t data_len;
674 u8 tmp[FILS_ICK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
675 FILS_FT_MAX_LEN + WPA_KDK_MAX_LEN];
676 size_t key_data_len;
677 const char *label = "FILS PTK Derivation";
678 int ret = -1;
679 size_t offset;
680
681 /*
682 * FILS-Key-Data = PRF-X(PMK, "FILS PTK Derivation",
683 * SPA || AA || SNonce || ANonce [ || DHss ])
684 * ICK = L(FILS-Key-Data, 0, ICK_bits)
685 * KEK = L(FILS-Key-Data, ICK_bits, KEK_bits)
686 * TK = L(FILS-Key-Data, ICK_bits + KEK_bits, TK_bits)
687 * If doing FT initial mobility domain association:
688 * FILS-FT = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits,
689 * FILS-FT_bits)
690 * When a KDK is derived:
691 * KDK = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits + FILS-FT_bits,
692 * KDK_bits)
693 */
694 data_len = 2 * ETH_ALEN + 2 * FILS_NONCE_LEN + dhss_len;
695 data = os_malloc(data_len);
696 if (!data)
697 goto err;
698 pos = data;
699 os_memcpy(pos, spa, ETH_ALEN);
700 pos += ETH_ALEN;
701 os_memcpy(pos, aa, ETH_ALEN);
702 pos += ETH_ALEN;
703 os_memcpy(pos, snonce, FILS_NONCE_LEN);
704 pos += FILS_NONCE_LEN;
705 os_memcpy(pos, anonce, FILS_NONCE_LEN);
706 pos += FILS_NONCE_LEN;
707 if (dhss)
708 os_memcpy(pos, dhss, dhss_len);
709
710 ptk->kck_len = 0;
711 ptk->kek_len = wpa_kek_len(akmp, pmk_len);
712 ptk->tk_len = wpa_cipher_key_len(cipher);
713 if (wpa_key_mgmt_sha384(akmp))
714 *ick_len = 48;
715 else if (wpa_key_mgmt_sha256(akmp))
716 *ick_len = 32;
717 else
718 goto err;
719 key_data_len = *ick_len + ptk->kek_len + ptk->tk_len;
720
721 if (kdk_len) {
722 if (kdk_len > WPA_KDK_MAX_LEN) {
723 wpa_printf(MSG_ERROR, "FILS: KDK len=%zu too big",
724 kdk_len);
725 goto err;
726 }
727
728 ptk->kdk_len = kdk_len;
729 key_data_len += kdk_len;
730 } else {
731 ptk->kdk_len = 0;
732 }
733
734 if (fils_ft && fils_ft_len) {
735 if (akmp == WPA_KEY_MGMT_FT_FILS_SHA256) {
736 *fils_ft_len = 32;
737 } else if (akmp == WPA_KEY_MGMT_FT_FILS_SHA384) {
738 *fils_ft_len = 48;
739 } else {
740 *fils_ft_len = 0;
741 fils_ft = NULL;
742 }
743 key_data_len += *fils_ft_len;
744 }
745
746 if (wpa_key_mgmt_sha384(akmp)) {
747 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA384)");
748 if (sha384_prf(pmk, pmk_len, label, data, data_len,
749 tmp, key_data_len) < 0)
750 goto err;
751 } else {
752 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA256)");
753 if (sha256_prf(pmk, pmk_len, label, data, data_len,
754 tmp, key_data_len) < 0)
755 goto err;
756 }
757
758 wpa_printf(MSG_DEBUG, "FILS: PTK derivation - SPA=" MACSTR
759 " AA=" MACSTR, MAC2STR(spa), MAC2STR(aa));
760 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
761 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
762 if (dhss)
763 wpa_hexdump_key(MSG_DEBUG, "FILS: DHss", dhss, dhss_len);
764 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, pmk_len);
765 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-Key-Data", tmp, key_data_len);
766
767 os_memcpy(ick, tmp, *ick_len);
768 offset = *ick_len;
769 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, *ick_len);
770
771 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len);
772 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK", ptk->kek, ptk->kek_len);
773 offset += ptk->kek_len;
774
775 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len);
776 wpa_hexdump_key(MSG_DEBUG, "FILS: TK", ptk->tk, ptk->tk_len);
777 offset += ptk->tk_len;
778
779 if (fils_ft && fils_ft_len) {
780 os_memcpy(fils_ft, tmp + offset, *fils_ft_len);
781 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-FT",
782 fils_ft, *fils_ft_len);
783 offset += *fils_ft_len;
784 }
785
786 if (ptk->kdk_len) {
787 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len);
788 wpa_hexdump_key(MSG_DEBUG, "FILS: KDK", ptk->kdk, ptk->kdk_len);
789 }
790
791 ptk->kek2_len = 0;
792 ptk->kck2_len = 0;
793
794 os_memset(tmp, 0, sizeof(tmp));
795 ret = 0;
796 err:
797 bin_clear_free(data, data_len);
798 return ret;
799 }
800
801
fils_key_auth_sk(const u8 * ick,size_t ick_len,const u8 * snonce,const u8 * anonce,const u8 * sta_addr,const u8 * bssid,const u8 * g_sta,size_t g_sta_len,const u8 * g_ap,size_t g_ap_len,int akmp,u8 * key_auth_sta,u8 * key_auth_ap,size_t * key_auth_len)802 int fils_key_auth_sk(const u8 *ick, size_t ick_len, const u8 *snonce,
803 const u8 *anonce, const u8 *sta_addr, const u8 *bssid,
804 const u8 *g_sta, size_t g_sta_len,
805 const u8 *g_ap, size_t g_ap_len,
806 int akmp, u8 *key_auth_sta, u8 *key_auth_ap,
807 size_t *key_auth_len)
808 {
809 const u8 *addr[6];
810 size_t len[6];
811 size_t num_elem = 4;
812 int res;
813
814 wpa_printf(MSG_DEBUG, "FILS: Key-Auth derivation: STA-MAC=" MACSTR
815 " AP-BSSID=" MACSTR, MAC2STR(sta_addr), MAC2STR(bssid));
816 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, ick_len);
817 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
818 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
819 wpa_hexdump(MSG_DEBUG, "FILS: gSTA", g_sta, g_sta_len);
820 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len);
821
822 /*
823 * For (Re)Association Request frame (STA->AP):
824 * Key-Auth = HMAC-Hash(ICK, SNonce || ANonce || STA-MAC || AP-BSSID
825 * [ || gSTA || gAP ])
826 */
827 addr[0] = snonce;
828 len[0] = FILS_NONCE_LEN;
829 addr[1] = anonce;
830 len[1] = FILS_NONCE_LEN;
831 addr[2] = sta_addr;
832 len[2] = ETH_ALEN;
833 addr[3] = bssid;
834 len[3] = ETH_ALEN;
835 if (g_sta && g_sta_len && g_ap && g_ap_len) {
836 addr[4] = g_sta;
837 len[4] = g_sta_len;
838 addr[5] = g_ap;
839 len[5] = g_ap_len;
840 num_elem = 6;
841 }
842
843 if (wpa_key_mgmt_sha384(akmp)) {
844 *key_auth_len = 48;
845 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len,
846 key_auth_sta);
847 } else if (wpa_key_mgmt_sha256(akmp)) {
848 *key_auth_len = 32;
849 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len,
850 key_auth_sta);
851 } else {
852 return -1;
853 }
854 if (res < 0)
855 return res;
856
857 /*
858 * For (Re)Association Response frame (AP->STA):
859 * Key-Auth = HMAC-Hash(ICK, ANonce || SNonce || AP-BSSID || STA-MAC
860 * [ || gAP || gSTA ])
861 */
862 addr[0] = anonce;
863 addr[1] = snonce;
864 addr[2] = bssid;
865 addr[3] = sta_addr;
866 if (g_sta && g_sta_len && g_ap && g_ap_len) {
867 addr[4] = g_ap;
868 len[4] = g_ap_len;
869 addr[5] = g_sta;
870 len[5] = g_sta_len;
871 }
872
873 if (wpa_key_mgmt_sha384(akmp))
874 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len,
875 key_auth_ap);
876 else if (wpa_key_mgmt_sha256(akmp))
877 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len,
878 key_auth_ap);
879 if (res < 0)
880 return res;
881
882 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (STA)",
883 key_auth_sta, *key_auth_len);
884 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (AP)",
885 key_auth_ap, *key_auth_len);
886
887 return 0;
888 }
889
890 #endif /* CONFIG_FILS */
891
892
893 #ifdef CONFIG_IEEE80211R
wpa_ft_mic(int key_mgmt,const u8 * kck,size_t kck_len,const u8 * sta_addr,const u8 * ap_addr,u8 transaction_seqnum,const u8 * mdie,size_t mdie_len,const u8 * ftie,size_t ftie_len,const u8 * rsnie,size_t rsnie_len,const u8 * ric,size_t ric_len,const u8 * rsnxe,size_t rsnxe_len,const struct wpabuf * extra,u8 * mic)894 int wpa_ft_mic(int key_mgmt, const u8 *kck, size_t kck_len, const u8 *sta_addr,
895 const u8 *ap_addr, u8 transaction_seqnum,
896 const u8 *mdie, size_t mdie_len,
897 const u8 *ftie, size_t ftie_len,
898 const u8 *rsnie, size_t rsnie_len,
899 const u8 *ric, size_t ric_len,
900 const u8 *rsnxe, size_t rsnxe_len,
901 const struct wpabuf *extra,
902 u8 *mic)
903 {
904 const u8 *addr[11];
905 size_t len[11];
906 size_t i, num_elem = 0;
907 u8 zero_mic[32];
908 size_t mic_len, fte_fixed_len;
909 int res;
910
911 if (kck_len == 16) {
912 mic_len = 16;
913 #ifdef CONFIG_SHA384
914 } else if (kck_len == 24) {
915 mic_len = 24;
916 #endif /* CONFIG_SHA384 */
917 #ifdef CONFIG_SHA512
918 } else if (kck_len == 32) {
919 mic_len = 32;
920 #endif /* CONFIG_SHA512 */
921 } else {
922 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u",
923 (unsigned int) kck_len);
924 return -1;
925 }
926
927 fte_fixed_len = sizeof(struct rsn_ftie) - 16 + mic_len;
928
929 addr[num_elem] = sta_addr;
930 len[num_elem] = ETH_ALEN;
931 num_elem++;
932
933 addr[num_elem] = ap_addr;
934 len[num_elem] = ETH_ALEN;
935 num_elem++;
936
937 addr[num_elem] = &transaction_seqnum;
938 len[num_elem] = 1;
939 num_elem++;
940
941 if (rsnie) {
942 addr[num_elem] = rsnie;
943 len[num_elem] = rsnie_len;
944 num_elem++;
945 }
946 if (mdie) {
947 addr[num_elem] = mdie;
948 len[num_elem] = mdie_len;
949 num_elem++;
950 }
951 if (ftie) {
952 if (ftie_len < 2 + fte_fixed_len)
953 return -1;
954
955 /* IE hdr and mic_control */
956 addr[num_elem] = ftie;
957 len[num_elem] = 2 + 2;
958 num_elem++;
959
960 /* MIC field with all zeros */
961 os_memset(zero_mic, 0, mic_len);
962 addr[num_elem] = zero_mic;
963 len[num_elem] = mic_len;
964 num_elem++;
965
966 /* Rest of FTIE */
967 addr[num_elem] = ftie + 2 + 2 + mic_len;
968 len[num_elem] = ftie_len - (2 + 2 + mic_len);
969 num_elem++;
970 }
971 if (ric) {
972 addr[num_elem] = ric;
973 len[num_elem] = ric_len;
974 num_elem++;
975 }
976
977 if (rsnxe) {
978 addr[num_elem] = rsnxe;
979 len[num_elem] = rsnxe_len;
980 num_elem++;
981 }
982
983 if (extra) {
984 addr[num_elem] = wpabuf_head(extra);
985 len[num_elem] = wpabuf_len(extra);
986 num_elem++;
987 }
988
989 for (i = 0; i < num_elem; i++)
990 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]);
991 res = -1;
992 #ifdef CONFIG_SHA512
993 if (kck_len == 32) {
994 u8 hash[SHA512_MAC_LEN];
995
996 if (hmac_sha512_vector(kck, kck_len, num_elem, addr, len, hash))
997 return -1;
998 os_memcpy(mic, hash, 32);
999 res = 0;
1000 }
1001 #endif /* CONFIG_SHA384 */
1002 #ifdef CONFIG_SHA384
1003 if (kck_len == 24) {
1004 u8 hash[SHA384_MAC_LEN];
1005
1006 if (hmac_sha384_vector(kck, kck_len, num_elem, addr, len, hash))
1007 return -1;
1008 os_memcpy(mic, hash, 24);
1009 res = 0;
1010 }
1011 #endif /* CONFIG_SHA384 */
1012 if (kck_len == 16 && key_mgmt == WPA_KEY_MGMT_FT_SAE_EXT_KEY) {
1013 u8 hash[SHA256_MAC_LEN];
1014
1015 if (hmac_sha256_vector(kck, kck_len, num_elem, addr, len, hash))
1016 return -1;
1017 os_memcpy(mic, hash, 16);
1018 res = 0;
1019 }
1020 if (kck_len == 16 && key_mgmt != WPA_KEY_MGMT_FT_SAE_EXT_KEY &&
1021 omac1_aes_128_vector(kck, num_elem, addr, len, mic) == 0)
1022 res = 0;
1023
1024 return res;
1025 }
1026
1027
wpa_ft_parse_ftie(const u8 * ie,size_t ie_len,struct wpa_ft_ies * parse,const u8 * opt)1028 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
1029 struct wpa_ft_ies *parse, const u8 *opt)
1030 {
1031 const u8 *end, *pos;
1032 u8 link_id;
1033
1034 parse->ftie = ie;
1035 parse->ftie_len = ie_len;
1036
1037 pos = opt;
1038 end = ie + ie_len;
1039 wpa_hexdump(MSG_DEBUG, "FT: Parse FTE subelements", pos, end - pos);
1040
1041 while (end - pos >= 2) {
1042 u8 id, len;
1043
1044 id = *pos++;
1045 len = *pos++;
1046 if (len > end - pos) {
1047 wpa_printf(MSG_DEBUG, "FT: Truncated subelement");
1048 return -1;
1049 }
1050
1051 switch (id) {
1052 case FTIE_SUBELEM_R1KH_ID:
1053 if (len != FT_R1KH_ID_LEN) {
1054 wpa_printf(MSG_DEBUG,
1055 "FT: Invalid R1KH-ID length in FTIE: %d",
1056 len);
1057 return -1;
1058 }
1059 parse->r1kh_id = pos;
1060 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID",
1061 parse->r1kh_id, FT_R1KH_ID_LEN);
1062 break;
1063 case FTIE_SUBELEM_GTK:
1064 wpa_printf(MSG_DEBUG, "FT: GTK");
1065 parse->gtk = pos;
1066 parse->gtk_len = len;
1067 break;
1068 case FTIE_SUBELEM_R0KH_ID:
1069 if (len < 1 || len > FT_R0KH_ID_MAX_LEN) {
1070 wpa_printf(MSG_DEBUG,
1071 "FT: Invalid R0KH-ID length in FTIE: %d",
1072 len);
1073 return -1;
1074 }
1075 parse->r0kh_id = pos;
1076 parse->r0kh_id_len = len;
1077 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID",
1078 parse->r0kh_id, parse->r0kh_id_len);
1079 break;
1080 case FTIE_SUBELEM_IGTK:
1081 wpa_printf(MSG_DEBUG, "FT: IGTK");
1082 parse->igtk = pos;
1083 parse->igtk_len = len;
1084 break;
1085 #ifdef CONFIG_OCV
1086 case FTIE_SUBELEM_OCI:
1087 parse->oci = pos;
1088 parse->oci_len = len;
1089 wpa_hexdump(MSG_DEBUG, "FT: OCI",
1090 parse->oci, parse->oci_len);
1091 break;
1092 #endif /* CONFIG_OCV */
1093 case FTIE_SUBELEM_BIGTK:
1094 wpa_printf(MSG_DEBUG, "FT: BIGTK");
1095 parse->bigtk = pos;
1096 parse->bigtk_len = len;
1097 break;
1098 case FTIE_SUBELEM_MLO_GTK:
1099 if (len < 2 + 1 + 1 + 8) {
1100 wpa_printf(MSG_DEBUG,
1101 "FT: Too short MLO GTK in FTE");
1102 return -1;
1103 }
1104 link_id = pos[2] & 0x0f;
1105 wpa_printf(MSG_DEBUG, "FT: MLO GTK (Link ID %u)",
1106 link_id);
1107 if (link_id >= MAX_NUM_MLO_LINKS)
1108 break;
1109 parse->valid_mlo_gtks |= BIT(link_id);
1110 parse->mlo_gtk[link_id] = pos;
1111 parse->mlo_gtk_len[link_id] = len;
1112 break;
1113 case FTIE_SUBELEM_MLO_IGTK:
1114 if (len < 2 + 6 + 1 + 1) {
1115 wpa_printf(MSG_DEBUG,
1116 "FT: Too short MLO IGTK in FTE");
1117 return -1;
1118 }
1119 link_id = pos[2 + 6] & 0x0f;
1120 wpa_printf(MSG_DEBUG, "FT: MLO IGTK (Link ID %u)",
1121 link_id);
1122 if (link_id >= MAX_NUM_MLO_LINKS)
1123 break;
1124 parse->valid_mlo_igtks |= BIT(link_id);
1125 parse->mlo_igtk[link_id] = pos;
1126 parse->mlo_igtk_len[link_id] = len;
1127 break;
1128 case FTIE_SUBELEM_MLO_BIGTK:
1129 if (len < 2 + 6 + 1 + 1) {
1130 wpa_printf(MSG_DEBUG,
1131 "FT: Too short MLO BIGTK in FTE");
1132 return -1;
1133 }
1134 link_id = pos[2 + 6] & 0x0f;
1135 wpa_printf(MSG_DEBUG, "FT: MLO BIGTK (Link ID %u)",
1136 link_id);
1137 if (link_id >= MAX_NUM_MLO_LINKS)
1138 break;
1139 parse->valid_mlo_bigtks |= BIT(link_id);
1140 parse->mlo_bigtk[link_id] = pos;
1141 parse->mlo_bigtk_len[link_id] = len;
1142 break;
1143 default:
1144 wpa_printf(MSG_DEBUG, "FT: Unknown subelem id %u", id);
1145 break;
1146 }
1147
1148 pos += len;
1149 }
1150
1151 return 0;
1152 }
1153
1154
wpa_ft_parse_fte(int key_mgmt,const u8 * ie,size_t len,struct wpa_ft_ies * parse)1155 static int wpa_ft_parse_fte(int key_mgmt, const u8 *ie, size_t len,
1156 struct wpa_ft_ies *parse)
1157 {
1158 size_t mic_len;
1159 u8 mic_len_info;
1160 const u8 *pos = ie;
1161 const u8 *end = pos + len;
1162
1163 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control", pos, 2);
1164 parse->fte_rsnxe_used = pos[0] & FTE_MIC_CTRL_RSNXE_USED;
1165 mic_len_info = (pos[0] & FTE_MIC_CTRL_MIC_LEN_MASK) >>
1166 FTE_MIC_CTRL_MIC_LEN_SHIFT;
1167 parse->fte_elem_count = pos[1];
1168 pos += 2;
1169
1170 if (key_mgmt == WPA_KEY_MGMT_FT_SAE_EXT_KEY) {
1171 switch (mic_len_info) {
1172 case FTE_MIC_LEN_16:
1173 mic_len = 16;
1174 break;
1175 case FTE_MIC_LEN_24:
1176 mic_len = 24;
1177 break;
1178 case FTE_MIC_LEN_32:
1179 mic_len = 32;
1180 break;
1181 default:
1182 wpa_printf(MSG_DEBUG,
1183 "FT: Unknown MIC Length subfield value %u",
1184 mic_len_info);
1185 return -1;
1186 }
1187 } else {
1188 mic_len = wpa_key_mgmt_sha384(key_mgmt) ? 24 : 16;
1189 }
1190 if (mic_len > (size_t) (end - pos)) {
1191 wpa_printf(MSG_DEBUG, "FT: No room for %zu octet MIC in FTE",
1192 mic_len);
1193 return -1;
1194 }
1195 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC", pos, mic_len);
1196 parse->fte_mic = pos;
1197 parse->fte_mic_len = mic_len;
1198 pos += mic_len;
1199
1200 if (2 * WPA_NONCE_LEN > end - pos)
1201 return -1;
1202 parse->fte_anonce = pos;
1203 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce",
1204 parse->fte_anonce, WPA_NONCE_LEN);
1205 pos += WPA_NONCE_LEN;
1206 parse->fte_snonce = pos;
1207 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce",
1208 parse->fte_snonce, WPA_NONCE_LEN);
1209 pos += WPA_NONCE_LEN;
1210
1211 return wpa_ft_parse_ftie(ie, len, parse, pos);
1212 }
1213
1214
wpa_ft_parse_ies(const u8 * ies,size_t ies_len,struct wpa_ft_ies * parse,int key_mgmt,bool reassoc_resp)1215 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, struct wpa_ft_ies *parse,
1216 int key_mgmt, bool reassoc_resp)
1217 {
1218 const u8 *end, *pos;
1219 struct wpa_ie_data data;
1220 int ret;
1221 int prot_ie_count = 0;
1222 const u8 *fte = NULL;
1223 size_t fte_len = 0;
1224 bool is_fte = false;
1225 struct ieee802_11_elems elems;
1226
1227 os_memset(parse, 0, sizeof(*parse));
1228 if (ies == NULL)
1229 return 0;
1230
1231 if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) == ParseFailed) {
1232 wpa_printf(MSG_DEBUG, "FT: Failed to parse elements");
1233 goto fail;
1234 }
1235
1236 pos = ies;
1237 end = ies + ies_len;
1238 while (end - pos >= 2) {
1239 u8 id, len;
1240
1241 id = *pos++;
1242 len = *pos++;
1243 if (len > end - pos)
1244 break;
1245
1246 if (id != WLAN_EID_FAST_BSS_TRANSITION &&
1247 id != WLAN_EID_FRAGMENT)
1248 is_fte = false;
1249
1250 switch (id) {
1251 case WLAN_EID_RSN:
1252 wpa_hexdump(MSG_DEBUG, "FT: RSNE", pos, len);
1253 parse->rsn = pos;
1254 parse->rsn_len = len;
1255 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
1256 parse->rsn_len + 2,
1257 &data);
1258 if (ret < 0) {
1259 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
1260 "RSN IE: %d", ret);
1261 goto fail;
1262 }
1263 parse->rsn_capab = data.capabilities;
1264 if (data.num_pmkid == 1 && data.pmkid)
1265 parse->rsn_pmkid = data.pmkid;
1266 parse->key_mgmt = data.key_mgmt;
1267 parse->pairwise_cipher = data.pairwise_cipher;
1268 if (!key_mgmt)
1269 key_mgmt = parse->key_mgmt;
1270 break;
1271 case WLAN_EID_RSNX:
1272 wpa_hexdump(MSG_DEBUG, "FT: RSNXE", pos, len);
1273 if (len < 1)
1274 break;
1275 parse->rsnxe = pos;
1276 parse->rsnxe_len = len;
1277 break;
1278 case WLAN_EID_MOBILITY_DOMAIN:
1279 wpa_hexdump(MSG_DEBUG, "FT: MDE", pos, len);
1280 if (len < sizeof(struct rsn_mdie))
1281 goto fail;
1282 parse->mdie = pos;
1283 parse->mdie_len = len;
1284 break;
1285 case WLAN_EID_FAST_BSS_TRANSITION:
1286 wpa_hexdump(MSG_DEBUG, "FT: FTE", pos, len);
1287 /* The first two octets (MIC Control field) is in the
1288 * same offset for all cases, but the second field (MIC)
1289 * has variable length with three different values.
1290 * In particular the FT-SAE-EXT-KEY is inconvinient to
1291 * parse, so try to handle this in pieces instead of
1292 * using the struct rsn_ftie* definitions. */
1293
1294 if (len < 2)
1295 goto fail;
1296 prot_ie_count = pos[1]; /* Element Count field in
1297 * MIC Control */
1298 is_fte = true;
1299 fte = pos;
1300 fte_len = len;
1301 break;
1302 case WLAN_EID_FRAGMENT:
1303 if (is_fte) {
1304 wpa_hexdump(MSG_DEBUG, "FT: FTE fragment",
1305 pos, len);
1306 fte_len += 2 + len;
1307 }
1308 break;
1309 case WLAN_EID_TIMEOUT_INTERVAL:
1310 wpa_hexdump(MSG_DEBUG, "FT: Timeout Interval",
1311 pos, len);
1312 if (len != 5)
1313 break;
1314 parse->tie = pos;
1315 parse->tie_len = len;
1316 break;
1317 case WLAN_EID_RIC_DATA:
1318 if (parse->ric == NULL)
1319 parse->ric = pos - 2;
1320 break;
1321 }
1322
1323 pos += len;
1324 }
1325
1326 if (fte) {
1327 int res;
1328
1329 if (fte_len < 255) {
1330 res = wpa_ft_parse_fte(key_mgmt, fte, fte_len, parse);
1331 } else {
1332 parse->fte_buf = ieee802_11_defrag_data(fte, fte_len,
1333 false);
1334 if (!parse->fte_buf)
1335 goto fail;
1336 res = wpa_ft_parse_fte(key_mgmt,
1337 wpabuf_head(parse->fte_buf),
1338 wpabuf_len(parse->fte_buf),
1339 parse);
1340 }
1341 if (res < 0)
1342 goto fail;
1343 }
1344
1345 if (prot_ie_count == 0)
1346 return 0; /* no MIC */
1347
1348 /*
1349 * Check that the protected IE count matches with IEs included in the
1350 * frame.
1351 */
1352 if (reassoc_resp && elems.basic_mle) {
1353 unsigned int link_id;
1354
1355 /* TODO: This count should be done based on all _requested_,
1356 * not _accepted_ links. */
1357 for (link_id = 0; link_id < MAX_NUM_MLO_LINKS; link_id++) {
1358 if (parse->mlo_gtk[link_id]) {
1359 if (parse->rsn)
1360 prot_ie_count--;
1361 if (parse->rsnxe)
1362 prot_ie_count--;
1363 }
1364 }
1365 } else {
1366 if (parse->rsn)
1367 prot_ie_count--;
1368 if (parse->rsnxe)
1369 prot_ie_count--;
1370 }
1371 if (parse->mdie)
1372 prot_ie_count--;
1373 if (parse->ftie)
1374 prot_ie_count--;
1375 if (prot_ie_count < 0) {
1376 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
1377 "the protected IE count");
1378 goto fail;
1379 }
1380
1381 if (prot_ie_count == 0 && parse->ric) {
1382 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
1383 "included in protected IE count");
1384 goto fail;
1385 }
1386
1387 /* Determine the end of the RIC IE(s) */
1388 if (parse->ric) {
1389 pos = parse->ric;
1390 while (end - pos >= 2 && 2 + pos[1] <= end - pos &&
1391 prot_ie_count) {
1392 prot_ie_count--;
1393 pos += 2 + pos[1];
1394 }
1395 parse->ric_len = pos - parse->ric;
1396 }
1397 if (prot_ie_count) {
1398 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
1399 "frame", (int) prot_ie_count);
1400 goto fail;
1401 }
1402
1403 return 0;
1404
1405 fail:
1406 wpa_ft_parse_ies_free(parse);
1407 return -1;
1408 }
1409
1410
wpa_ft_parse_ies_free(struct wpa_ft_ies * parse)1411 void wpa_ft_parse_ies_free(struct wpa_ft_ies *parse)
1412 {
1413 if (!parse)
1414 return;
1415 wpabuf_free(parse->fte_buf);
1416 parse->fte_buf = NULL;
1417 }
1418
1419 #endif /* CONFIG_IEEE80211R */
1420
1421
1422 #ifdef CONFIG_PASN
1423
1424 /*
1425 * pasn_use_sha384 - Should SHA384 be used or SHA256
1426 *
1427 * @akmp: Authentication and key management protocol
1428 * @cipher: The cipher suite
1429 *
1430 * According to IEEE P802.11az/D2.7, 12.12.7, the hash algorithm to use is the
1431 * hash algorithm defined for the Base AKM (see Table 9-151 (AKM suite
1432 * selectors)). When there is no Base AKM, the hash algorithm is selected based
1433 * on the pairwise cipher suite provided in the RSNE by the AP in the second
1434 * PASN frame. SHA-256 is used as the hash algorithm, except for the ciphers
1435 * 00-0F-AC:9 and 00-0F-AC:10 for which SHA-384 is used.
1436 */
pasn_use_sha384(int akmp,int cipher)1437 bool pasn_use_sha384(int akmp, int cipher)
1438 {
1439 return (akmp == WPA_KEY_MGMT_PASN && (cipher == WPA_CIPHER_CCMP_256 ||
1440 cipher == WPA_CIPHER_GCMP_256)) ||
1441 wpa_key_mgmt_sha384(akmp);
1442 }
1443
1444
1445 /**
1446 * pasn_pmk_to_ptk - Calculate PASN PTK from PMK, addresses, etc.
1447 * @pmk: Pairwise master key
1448 * @pmk_len: Length of PMK
1449 * @spa: Suppplicant address
1450 * @bssid: AP BSSID
1451 * @dhss: Is the shared secret (DHss) derived from the PASN ephemeral key
1452 * exchange encoded as an octet string
1453 * @dhss_len: The length of dhss in octets
1454 * @ptk: Buffer for pairwise transient key
1455 * @akmp: Negotiated AKM
1456 * @cipher: Negotiated pairwise cipher
1457 * @kdk_len: the length in octets that should be derived for HTLK. Can be zero.
1458 * Returns: 0 on success, -1 on failure
1459 */
pasn_pmk_to_ptk(const u8 * pmk,size_t pmk_len,const u8 * spa,const u8 * bssid,const u8 * dhss,size_t dhss_len,struct wpa_ptk * ptk,int akmp,int cipher,size_t kdk_len)1460 int pasn_pmk_to_ptk(const u8 *pmk, size_t pmk_len,
1461 const u8 *spa, const u8 *bssid,
1462 const u8 *dhss, size_t dhss_len,
1463 struct wpa_ptk *ptk, int akmp, int cipher,
1464 size_t kdk_len)
1465 {
1466 u8 tmp[WPA_KCK_MAX_LEN + WPA_TK_MAX_LEN + WPA_KDK_MAX_LEN];
1467 u8 *data;
1468 size_t data_len, ptk_len;
1469 int ret = -1;
1470 const char *label = "PASN PTK Derivation";
1471
1472 if (!pmk || !pmk_len) {
1473 wpa_printf(MSG_ERROR, "PASN: No PMK set for PTK derivation");
1474 return -1;
1475 }
1476
1477 if (!dhss || !dhss_len) {
1478 wpa_printf(MSG_ERROR, "PASN: No DHss set for PTK derivation");
1479 return -1;
1480 }
1481
1482 /*
1483 * PASN-PTK = KDF(PMK, “PASN PTK Derivation”, SPA || BSSID || DHss)
1484 *
1485 * KCK = L(PASN-PTK, 0, 256)
1486 * TK = L(PASN-PTK, 256, TK_bits)
1487 * KDK = L(PASN-PTK, 256 + TK_bits, kdk_len * 8)
1488 */
1489 data_len = 2 * ETH_ALEN + dhss_len;
1490 data = os_zalloc(data_len);
1491 if (!data)
1492 return -1;
1493
1494 os_memcpy(data, spa, ETH_ALEN);
1495 os_memcpy(data + ETH_ALEN, bssid, ETH_ALEN);
1496 os_memcpy(data + 2 * ETH_ALEN, dhss, dhss_len);
1497
1498 ptk->kck_len = WPA_PASN_KCK_LEN;
1499 ptk->tk_len = wpa_cipher_key_len(cipher);
1500 ptk->kdk_len = kdk_len;
1501 ptk->kek_len = 0;
1502 ptk->kek2_len = 0;
1503 ptk->kck2_len = 0;
1504
1505 if (ptk->tk_len == 0) {
1506 wpa_printf(MSG_ERROR,
1507 "PASN: Unsupported cipher (0x%x) used in PTK derivation",
1508 cipher);
1509 goto err;
1510 }
1511
1512 ptk_len = ptk->kck_len + ptk->tk_len + ptk->kdk_len;
1513 if (ptk_len > sizeof(tmp))
1514 goto err;
1515
1516 if (pasn_use_sha384(akmp, cipher)) {
1517 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA384");
1518
1519 if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp,
1520 ptk_len) < 0)
1521 goto err;
1522 } else {
1523 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA256");
1524
1525 if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp,
1526 ptk_len) < 0)
1527 goto err;
1528 }
1529
1530 wpa_printf(MSG_DEBUG,
1531 "PASN: PTK derivation: SPA=" MACSTR " BSSID=" MACSTR,
1532 MAC2STR(spa), MAC2STR(bssid));
1533
1534 wpa_hexdump_key(MSG_DEBUG, "PASN: DHss", dhss, dhss_len);
1535 wpa_hexdump_key(MSG_DEBUG, "PASN: PMK", pmk, pmk_len);
1536 wpa_hexdump_key(MSG_DEBUG, "PASN: PASN-PTK", tmp, ptk_len);
1537
1538 os_memcpy(ptk->kck, tmp, WPA_PASN_KCK_LEN);
1539 wpa_hexdump_key(MSG_DEBUG, "PASN: KCK:", ptk->kck, WPA_PASN_KCK_LEN);
1540
1541 os_memcpy(ptk->tk, tmp + WPA_PASN_KCK_LEN, ptk->tk_len);
1542 wpa_hexdump_key(MSG_DEBUG, "PASN: TK:", ptk->tk, ptk->tk_len);
1543
1544 if (kdk_len) {
1545 os_memcpy(ptk->kdk, tmp + WPA_PASN_KCK_LEN + ptk->tk_len,
1546 ptk->kdk_len);
1547 wpa_hexdump_key(MSG_DEBUG, "PASN: KDK:",
1548 ptk->kdk, ptk->kdk_len);
1549 }
1550
1551 forced_memzero(tmp, sizeof(tmp));
1552 ret = 0;
1553 err:
1554 bin_clear_free(data, data_len);
1555 return ret;
1556 }
1557
1558
1559 /*
1560 * pasn_mic_len - Returns the MIC length for PASN authentication
1561 */
pasn_mic_len(int akmp,int cipher)1562 u8 pasn_mic_len(int akmp, int cipher)
1563 {
1564 if (pasn_use_sha384(akmp, cipher))
1565 return 24;
1566
1567 return 16;
1568 }
1569
1570
1571 /**
1572 * wpa_ltf_keyseed - Compute LTF keyseed from KDK
1573 * @ptk: Buffer that holds pairwise transient key
1574 * @akmp: Negotiated AKM
1575 * @cipher: Negotiated pairwise cipher
1576 * Returns: 0 on success, -1 on failure
1577 */
wpa_ltf_keyseed(struct wpa_ptk * ptk,int akmp,int cipher)1578 int wpa_ltf_keyseed(struct wpa_ptk *ptk, int akmp, int cipher)
1579 {
1580 u8 *buf;
1581 size_t buf_len;
1582 u8 hash[SHA384_MAC_LEN];
1583 const u8 *kdk = ptk->kdk;
1584 size_t kdk_len = ptk->kdk_len;
1585 const char *label = "Secure LTF key seed";
1586
1587 if (!kdk || !kdk_len) {
1588 wpa_printf(MSG_ERROR, "WPA: No KDK for LTF keyseed generation");
1589 return -1;
1590 }
1591
1592 buf = (u8 *)label;
1593 buf_len = os_strlen(label);
1594
1595 if (pasn_use_sha384(akmp, cipher)) {
1596 wpa_printf(MSG_DEBUG,
1597 "WPA: Secure LTF keyseed using HMAC-SHA384");
1598
1599 if (hmac_sha384(kdk, kdk_len, buf, buf_len, hash)) {
1600 wpa_printf(MSG_ERROR,
1601 "WPA: HMAC-SHA384 compute failed");
1602 return -1;
1603 }
1604 os_memcpy(ptk->ltf_keyseed, hash, SHA384_MAC_LEN);
1605 ptk->ltf_keyseed_len = SHA384_MAC_LEN;
1606 wpa_hexdump_key(MSG_DEBUG, "WPA: Secure LTF keyseed: ",
1607 ptk->ltf_keyseed, ptk->ltf_keyseed_len);
1608
1609 } else {
1610 wpa_printf(MSG_DEBUG, "WPA: LTF keyseed using HMAC-SHA256");
1611
1612 if (hmac_sha256(kdk, kdk_len, buf, buf_len, hash)) {
1613 wpa_printf(MSG_ERROR,
1614 "WPA: HMAC-SHA256 compute failed");
1615 return -1;
1616 }
1617 os_memcpy(ptk->ltf_keyseed, hash, SHA256_MAC_LEN);
1618 ptk->ltf_keyseed_len = SHA256_MAC_LEN;
1619 wpa_hexdump_key(MSG_DEBUG, "WPA: Secure LTF keyseed: ",
1620 ptk->ltf_keyseed, ptk->ltf_keyseed_len);
1621 }
1622
1623 return 0;
1624 }
1625
1626
1627 /**
1628 * pasn_mic - Calculate PASN MIC
1629 * @kck: The key confirmation key for the PASN PTKSA
1630 * @akmp: Negotiated AKM
1631 * @cipher: Negotiated pairwise cipher
1632 * @addr1: For the 2nd PASN frame supplicant address; for the 3rd frame the
1633 * BSSID
1634 * @addr2: For the 2nd PASN frame the BSSID; for the 3rd frame the supplicant
1635 * address
1636 * @data: For calculating the MIC for the 2nd PASN frame, this should hold the
1637 * Beacon frame RSNE + RSNXE. For calculating the MIC for the 3rd PASN
1638 * frame, this should hold the hash of the body of the PASN 1st frame.
1639 * @data_len: The length of data
1640 * @frame: The body of the PASN frame including the MIC element with the octets
1641 * in the MIC field of the MIC element set to 0.
1642 * @frame_len: The length of frame
1643 * @mic: Buffer to hold the MIC on success. Should be big enough to handle the
1644 * maximal MIC length
1645 * Returns: 0 on success, -1 on failure
1646 */
pasn_mic(const u8 * kck,int akmp,int cipher,const u8 * addr1,const u8 * addr2,const u8 * data,size_t data_len,const u8 * frame,size_t frame_len,u8 * mic)1647 int pasn_mic(const u8 *kck, int akmp, int cipher,
1648 const u8 *addr1, const u8 *addr2,
1649 const u8 *data, size_t data_len,
1650 const u8 *frame, size_t frame_len, u8 *mic)
1651 {
1652 u8 *buf;
1653 u8 hash[SHA384_MAC_LEN];
1654 size_t buf_len = 2 * ETH_ALEN + data_len + frame_len;
1655 int ret = -1;
1656
1657 if (!kck) {
1658 wpa_printf(MSG_ERROR, "PASN: No KCK for MIC calculation");
1659 return -1;
1660 }
1661
1662 if (!data || !data_len) {
1663 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation");
1664 return -1;
1665 }
1666
1667 if (!frame || !frame_len) {
1668 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation");
1669 return -1;
1670 }
1671
1672 buf = os_zalloc(buf_len);
1673 if (!buf)
1674 return -1;
1675
1676 os_memcpy(buf, addr1, ETH_ALEN);
1677 os_memcpy(buf + ETH_ALEN, addr2, ETH_ALEN);
1678
1679 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: data", data, data_len);
1680 os_memcpy(buf + 2 * ETH_ALEN, data, data_len);
1681
1682 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: frame", frame, frame_len);
1683 os_memcpy(buf + 2 * ETH_ALEN + data_len, frame, frame_len);
1684
1685 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: KCK", kck, WPA_PASN_KCK_LEN);
1686 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: buf", buf, buf_len);
1687
1688 if (pasn_use_sha384(akmp, cipher)) {
1689 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA384");
1690
1691 if (hmac_sha384(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash))
1692 goto err;
1693
1694 os_memcpy(mic, hash, 24);
1695 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 24);
1696 } else {
1697 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA256");
1698
1699 if (hmac_sha256(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash))
1700 goto err;
1701
1702 os_memcpy(mic, hash, 16);
1703 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 16);
1704 }
1705
1706 ret = 0;
1707 err:
1708 bin_clear_free(buf, buf_len);
1709 return ret;
1710 }
1711
1712
1713 /**
1714 * pasn_auth_frame_hash - Computes a hash of an Authentication frame body
1715 * @akmp: Negotiated AKM
1716 * @cipher: Negotiated pairwise cipher
1717 * @data: Pointer to the Authentication frame body
1718 * @len: Length of the Authentication frame body
1719 * @hash: On return would hold the computed hash. Should be big enough to handle
1720 * SHA384.
1721 * Returns: 0 on success, -1 on failure
1722 */
pasn_auth_frame_hash(int akmp,int cipher,const u8 * data,size_t len,u8 * hash)1723 int pasn_auth_frame_hash(int akmp, int cipher, const u8 *data, size_t len,
1724 u8 *hash)
1725 {
1726 if (pasn_use_sha384(akmp, cipher)) {
1727 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-384");
1728 return sha384_vector(1, &data, &len, hash);
1729 } else {
1730 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-256");
1731 return sha256_vector(1, &data, &len, hash);
1732 }
1733 }
1734
1735 #endif /* CONFIG_PASN */
1736
1737
rsn_selector_to_bitfield(const u8 * s)1738 static int rsn_selector_to_bitfield(const u8 *s)
1739 {
1740 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
1741 return WPA_CIPHER_NONE;
1742 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
1743 return WPA_CIPHER_TKIP;
1744 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
1745 return WPA_CIPHER_CCMP;
1746 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
1747 return WPA_CIPHER_AES_128_CMAC;
1748 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
1749 return WPA_CIPHER_GCMP;
1750 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
1751 return WPA_CIPHER_CCMP_256;
1752 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
1753 return WPA_CIPHER_GCMP_256;
1754 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
1755 return WPA_CIPHER_BIP_GMAC_128;
1756 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
1757 return WPA_CIPHER_BIP_GMAC_256;
1758 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
1759 return WPA_CIPHER_BIP_CMAC_256;
1760 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
1761 return WPA_CIPHER_GTK_NOT_USED;
1762 return 0;
1763 }
1764
1765
rsn_key_mgmt_to_bitfield(const u8 * s)1766 static int rsn_key_mgmt_to_bitfield(const u8 *s)
1767 {
1768 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
1769 return WPA_KEY_MGMT_IEEE8021X;
1770 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
1771 return WPA_KEY_MGMT_PSK;
1772 #ifdef CONFIG_IEEE80211R
1773 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
1774 return WPA_KEY_MGMT_FT_IEEE8021X;
1775 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
1776 return WPA_KEY_MGMT_FT_PSK;
1777 #ifdef CONFIG_SHA384
1778 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384)
1779 return WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
1780 #endif /* CONFIG_SHA384 */
1781 #endif /* CONFIG_IEEE80211R */
1782 #ifdef CONFIG_SHA384
1783 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA384)
1784 return WPA_KEY_MGMT_IEEE8021X_SHA384;
1785 #endif /* CONFIG_SHA384 */
1786 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
1787 return WPA_KEY_MGMT_IEEE8021X_SHA256;
1788 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
1789 return WPA_KEY_MGMT_PSK_SHA256;
1790 #ifdef CONFIG_SAE
1791 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
1792 return WPA_KEY_MGMT_SAE;
1793 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE_EXT_KEY)
1794 return WPA_KEY_MGMT_SAE_EXT_KEY;
1795 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
1796 return WPA_KEY_MGMT_FT_SAE;
1797 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE_EXT_KEY)
1798 return WPA_KEY_MGMT_FT_SAE_EXT_KEY;
1799 #endif /* CONFIG_SAE */
1800 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
1801 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
1802 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192)
1803 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
1804 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA256)
1805 return WPA_KEY_MGMT_FILS_SHA256;
1806 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA384)
1807 return WPA_KEY_MGMT_FILS_SHA384;
1808 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA256)
1809 return WPA_KEY_MGMT_FT_FILS_SHA256;
1810 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA384)
1811 return WPA_KEY_MGMT_FT_FILS_SHA384;
1812 #ifdef CONFIG_OWE
1813 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OWE)
1814 return WPA_KEY_MGMT_OWE;
1815 #endif /* CONFIG_OWE */
1816 #ifdef CONFIG_DPP
1817 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_DPP)
1818 return WPA_KEY_MGMT_DPP;
1819 #endif /* CONFIG_DPP */
1820 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN)
1821 return WPA_KEY_MGMT_OSEN;
1822 #ifdef CONFIG_PASN
1823 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PASN)
1824 return WPA_KEY_MGMT_PASN;
1825 #endif /* CONFIG_PASN */
1826 return 0;
1827 }
1828
1829
wpa_cipher_valid_group(int cipher)1830 int wpa_cipher_valid_group(int cipher)
1831 {
1832 return wpa_cipher_valid_pairwise(cipher) ||
1833 cipher == WPA_CIPHER_GTK_NOT_USED;
1834 }
1835
1836
wpa_cipher_valid_mgmt_group(int cipher)1837 int wpa_cipher_valid_mgmt_group(int cipher)
1838 {
1839 return cipher == WPA_CIPHER_GTK_NOT_USED ||
1840 cipher == WPA_CIPHER_AES_128_CMAC ||
1841 cipher == WPA_CIPHER_BIP_GMAC_128 ||
1842 cipher == WPA_CIPHER_BIP_GMAC_256 ||
1843 cipher == WPA_CIPHER_BIP_CMAC_256;
1844 }
1845
1846
1847 /**
1848 * wpa_parse_wpa_ie_rsn - Parse RSN IE
1849 * @rsn_ie: Buffer containing RSN IE
1850 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
1851 * @data: Pointer to structure that will be filled in with parsed data
1852 * Returns: 0 on success, <0 on failure
1853 */
wpa_parse_wpa_ie_rsn(const u8 * rsn_ie,size_t rsn_ie_len,struct wpa_ie_data * data)1854 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
1855 struct wpa_ie_data *data)
1856 {
1857 const u8 *pos;
1858 int left;
1859 int i, count;
1860
1861 os_memset(data, 0, sizeof(*data));
1862 data->proto = WPA_PROTO_RSN;
1863 data->pairwise_cipher = WPA_CIPHER_CCMP;
1864 data->group_cipher = WPA_CIPHER_CCMP;
1865 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1866 data->capabilities = 0;
1867 data->pmkid = NULL;
1868 data->num_pmkid = 0;
1869 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1870
1871 if (rsn_ie_len == 0) {
1872 /* No RSN IE - fail silently */
1873 return -1;
1874 }
1875
1876 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
1877 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
1878 __func__, (unsigned long) rsn_ie_len);
1879 return -1;
1880 }
1881
1882 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 &&
1883 rsn_ie[1] == rsn_ie_len - 2 &&
1884 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) {
1885 pos = rsn_ie + 6;
1886 left = rsn_ie_len - 6;
1887
1888 data->group_cipher = WPA_CIPHER_GTK_NOT_USED;
1889 data->has_group = 1;
1890 data->key_mgmt = WPA_KEY_MGMT_OSEN;
1891 data->proto = WPA_PROTO_OSEN;
1892 } else {
1893 const struct rsn_ie_hdr *hdr;
1894
1895 hdr = (const struct rsn_ie_hdr *) rsn_ie;
1896
1897 if (hdr->elem_id != WLAN_EID_RSN ||
1898 hdr->len != rsn_ie_len - 2 ||
1899 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
1900 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
1901 __func__);
1902 return -2;
1903 }
1904
1905 pos = (const u8 *) (hdr + 1);
1906 left = rsn_ie_len - sizeof(*hdr);
1907 }
1908
1909 if (left >= RSN_SELECTOR_LEN) {
1910 data->group_cipher = rsn_selector_to_bitfield(pos);
1911 data->has_group = 1;
1912 if (!wpa_cipher_valid_group(data->group_cipher)) {
1913 wpa_printf(MSG_DEBUG,
1914 "%s: invalid group cipher 0x%x (%08x)",
1915 __func__, data->group_cipher,
1916 WPA_GET_BE32(pos));
1917 #ifdef CONFIG_NO_TKIP
1918 if (RSN_SELECTOR_GET(pos) == RSN_CIPHER_SUITE_TKIP) {
1919 wpa_printf(MSG_DEBUG,
1920 "%s: TKIP as group cipher not supported in CONFIG_NO_TKIP=y build",
1921 __func__);
1922 }
1923 #endif /* CONFIG_NO_TKIP */
1924 return -1;
1925 }
1926 pos += RSN_SELECTOR_LEN;
1927 left -= RSN_SELECTOR_LEN;
1928 } else if (left > 0) {
1929 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
1930 __func__, left);
1931 return -3;
1932 }
1933
1934 if (left >= 2) {
1935 data->pairwise_cipher = 0;
1936 count = WPA_GET_LE16(pos);
1937 pos += 2;
1938 left -= 2;
1939 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
1940 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
1941 "count %u left %u", __func__, count, left);
1942 return -4;
1943 }
1944 if (count)
1945 data->has_pairwise = 1;
1946 for (i = 0; i < count; i++) {
1947 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
1948 pos += RSN_SELECTOR_LEN;
1949 left -= RSN_SELECTOR_LEN;
1950 }
1951 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
1952 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
1953 "pairwise cipher", __func__);
1954 return -1;
1955 }
1956 } else if (left == 1) {
1957 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
1958 __func__);
1959 return -5;
1960 }
1961
1962 if (left >= 2) {
1963 data->key_mgmt = 0;
1964 count = WPA_GET_LE16(pos);
1965 pos += 2;
1966 left -= 2;
1967 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
1968 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
1969 "count %u left %u", __func__, count, left);
1970 return -6;
1971 }
1972 for (i = 0; i < count; i++) {
1973 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
1974 pos += RSN_SELECTOR_LEN;
1975 left -= RSN_SELECTOR_LEN;
1976 }
1977 } else if (left == 1) {
1978 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
1979 __func__);
1980 return -7;
1981 }
1982
1983 if (left >= 2) {
1984 data->capabilities = WPA_GET_LE16(pos);
1985 pos += 2;
1986 left -= 2;
1987 }
1988
1989 if (left >= 2) {
1990 u16 num_pmkid = WPA_GET_LE16(pos);
1991 pos += 2;
1992 left -= 2;
1993 if (num_pmkid > (unsigned int) left / PMKID_LEN) {
1994 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
1995 "(num_pmkid=%u left=%d)",
1996 __func__, num_pmkid, left);
1997 data->num_pmkid = 0;
1998 return -9;
1999 } else {
2000 data->num_pmkid = num_pmkid;
2001 data->pmkid = pos;
2002 pos += data->num_pmkid * PMKID_LEN;
2003 left -= data->num_pmkid * PMKID_LEN;
2004 }
2005 }
2006
2007 if (left >= 4) {
2008 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
2009 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
2010 wpa_printf(MSG_DEBUG,
2011 "%s: Unsupported management group cipher 0x%x (%08x)",
2012 __func__, data->mgmt_group_cipher,
2013 WPA_GET_BE32(pos));
2014 return -10;
2015 }
2016 pos += RSN_SELECTOR_LEN;
2017 left -= RSN_SELECTOR_LEN;
2018 }
2019
2020 if (left > 0) {
2021 wpa_hexdump(MSG_DEBUG,
2022 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
2023 pos, left);
2024 }
2025
2026 return 0;
2027 }
2028
2029
wpa_selector_to_bitfield(const u8 * s)2030 static int wpa_selector_to_bitfield(const u8 *s)
2031 {
2032 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
2033 return WPA_CIPHER_NONE;
2034 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
2035 return WPA_CIPHER_TKIP;
2036 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
2037 return WPA_CIPHER_CCMP;
2038 return 0;
2039 }
2040
2041
wpa_key_mgmt_to_bitfield(const u8 * s)2042 static int wpa_key_mgmt_to_bitfield(const u8 *s)
2043 {
2044 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
2045 return WPA_KEY_MGMT_IEEE8021X;
2046 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
2047 return WPA_KEY_MGMT_PSK;
2048 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
2049 return WPA_KEY_MGMT_WPA_NONE;
2050 return 0;
2051 }
2052
2053
wpa_parse_wpa_ie_wpa(const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ie_data * data)2054 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
2055 struct wpa_ie_data *data)
2056 {
2057 const struct wpa_ie_hdr *hdr;
2058 const u8 *pos;
2059 int left;
2060 int i, count;
2061
2062 os_memset(data, 0, sizeof(*data));
2063 data->proto = WPA_PROTO_WPA;
2064 data->pairwise_cipher = WPA_CIPHER_TKIP;
2065 data->group_cipher = WPA_CIPHER_TKIP;
2066 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
2067 data->capabilities = 0;
2068 data->pmkid = NULL;
2069 data->num_pmkid = 0;
2070 data->mgmt_group_cipher = 0;
2071
2072 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
2073 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
2074 __func__, (unsigned long) wpa_ie_len);
2075 return -1;
2076 }
2077
2078 hdr = (const struct wpa_ie_hdr *) wpa_ie;
2079
2080 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
2081 hdr->len != wpa_ie_len - 2 ||
2082 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
2083 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
2084 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
2085 __func__);
2086 return -2;
2087 }
2088
2089 pos = (const u8 *) (hdr + 1);
2090 left = wpa_ie_len - sizeof(*hdr);
2091
2092 if (left >= WPA_SELECTOR_LEN) {
2093 data->group_cipher = wpa_selector_to_bitfield(pos);
2094 pos += WPA_SELECTOR_LEN;
2095 left -= WPA_SELECTOR_LEN;
2096 } else if (left > 0) {
2097 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
2098 __func__, left);
2099 return -3;
2100 }
2101
2102 if (left >= 2) {
2103 data->pairwise_cipher = 0;
2104 count = WPA_GET_LE16(pos);
2105 pos += 2;
2106 left -= 2;
2107 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
2108 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
2109 "count %u left %u", __func__, count, left);
2110 return -4;
2111 }
2112 for (i = 0; i < count; i++) {
2113 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
2114 pos += WPA_SELECTOR_LEN;
2115 left -= WPA_SELECTOR_LEN;
2116 }
2117 } else if (left == 1) {
2118 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
2119 __func__);
2120 return -5;
2121 }
2122
2123 if (left >= 2) {
2124 data->key_mgmt = 0;
2125 count = WPA_GET_LE16(pos);
2126 pos += 2;
2127 left -= 2;
2128 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
2129 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
2130 "count %u left %u", __func__, count, left);
2131 return -6;
2132 }
2133 for (i = 0; i < count; i++) {
2134 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
2135 pos += WPA_SELECTOR_LEN;
2136 left -= WPA_SELECTOR_LEN;
2137 }
2138 } else if (left == 1) {
2139 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
2140 __func__);
2141 return -7;
2142 }
2143
2144 if (left >= 2) {
2145 data->capabilities = WPA_GET_LE16(pos);
2146 pos += 2;
2147 left -= 2;
2148 }
2149
2150 if (left > 0) {
2151 wpa_hexdump(MSG_DEBUG,
2152 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
2153 pos, left);
2154 }
2155
2156 return 0;
2157 }
2158
2159
wpa_default_rsn_cipher(int freq)2160 int wpa_default_rsn_cipher(int freq)
2161 {
2162 if (freq > 56160)
2163 return WPA_CIPHER_GCMP; /* DMG */
2164
2165 return WPA_CIPHER_CCMP;
2166 }
2167
2168
2169 #ifdef CONFIG_IEEE80211R
2170
2171 /**
2172 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
2173 *
2174 * IEEE Std 802.11r-2008 - 8.5.1.5.3
2175 */
wpa_derive_pmk_r0(const u8 * xxkey,size_t xxkey_len,const u8 * ssid,size_t ssid_len,const u8 * mdid,const u8 * r0kh_id,size_t r0kh_id_len,const u8 * s0kh_id,u8 * pmk_r0,u8 * pmk_r0_name,int key_mgmt)2176 int wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
2177 const u8 *ssid, size_t ssid_len,
2178 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
2179 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name,
2180 int key_mgmt)
2181 {
2182 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
2183 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
2184 u8 *pos, r0_key_data[64 + 16], hash[64];
2185 const u8 *addr[2];
2186 size_t len[2];
2187 size_t q, r0_key_data_len;
2188 int res;
2189
2190 if (key_mgmt == WPA_KEY_MGMT_FT_SAE_EXT_KEY &&
2191 (xxkey_len == SHA256_MAC_LEN || xxkey_len == SHA384_MAC_LEN ||
2192 xxkey_len == SHA512_MAC_LEN))
2193 q = xxkey_len;
2194 else if (wpa_key_mgmt_sha384(key_mgmt))
2195 q = SHA384_MAC_LEN;
2196 else
2197 q = SHA256_MAC_LEN;
2198 r0_key_data_len = q + 16;
2199
2200 /*
2201 * R0-Key-Data = KDF-Hash-Length(XXKey, "FT-R0",
2202 * SSIDlength || SSID || MDID || R0KHlength ||
2203 * R0KH-ID || S0KH-ID)
2204 * XXKey is either the second 256 bits of MSK or PSK; or the first
2205 * 384 bits of MSK for FT-EAP-SHA384; or PMK from SAE.
2206 * PMK-R0 = L(R0-Key-Data, 0, Q)
2207 * PMK-R0Name-Salt = L(R0-Key-Data, Q, 128)
2208 * Q = 384 for FT-EAP-SHA384; the length of the digest generated by H()
2209 * for FT-SAE-EXT-KEY; or otherwise, 256
2210 */
2211 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
2212 return -1;
2213 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R0 using KDF-SHA%zu", q * 8);
2214 wpa_hexdump_key(MSG_DEBUG, "FT: XXKey", xxkey, xxkey_len);
2215 wpa_hexdump_ascii(MSG_DEBUG, "FT: SSID", ssid, ssid_len);
2216 wpa_hexdump(MSG_DEBUG, "FT: MDID", mdid, MOBILITY_DOMAIN_ID_LEN);
2217 wpa_hexdump_ascii(MSG_DEBUG, "FT: R0KH-ID", r0kh_id, r0kh_id_len);
2218 wpa_printf(MSG_DEBUG, "FT: S0KH-ID: " MACSTR, MAC2STR(s0kh_id));
2219 pos = buf;
2220 *pos++ = ssid_len;
2221 os_memcpy(pos, ssid, ssid_len);
2222 pos += ssid_len;
2223 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
2224 pos += MOBILITY_DOMAIN_ID_LEN;
2225 *pos++ = r0kh_id_len;
2226 os_memcpy(pos, r0kh_id, r0kh_id_len);
2227 pos += r0kh_id_len;
2228 os_memcpy(pos, s0kh_id, ETH_ALEN);
2229 pos += ETH_ALEN;
2230
2231 res = -1;
2232 #ifdef CONFIG_SHA512
2233 if (q == SHA512_MAC_LEN) {
2234 if (xxkey_len != SHA512_MAC_LEN) {
2235 wpa_printf(MSG_ERROR,
2236 "FT: Unexpected XXKey length %d (expected %d)",
2237 (int) xxkey_len, SHA512_MAC_LEN);
2238 return -1;
2239 }
2240 res = sha512_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
2241 r0_key_data, r0_key_data_len);
2242 }
2243 #endif /* CONFIG_SHA512 */
2244 #ifdef CONFIG_SHA384
2245 if (q == SHA384_MAC_LEN) {
2246 if (xxkey_len != SHA384_MAC_LEN) {
2247 wpa_printf(MSG_ERROR,
2248 "FT: Unexpected XXKey length %d (expected %d)",
2249 (int) xxkey_len, SHA384_MAC_LEN);
2250 return -1;
2251 }
2252 res = sha384_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
2253 r0_key_data, r0_key_data_len);
2254 }
2255 #endif /* CONFIG_SHA384 */
2256 if (q == SHA256_MAC_LEN) {
2257 if (xxkey_len != PMK_LEN) {
2258 wpa_printf(MSG_ERROR,
2259 "FT: Unexpected XXKey length %d (expected %d)",
2260 (int) xxkey_len, PMK_LEN);
2261 return -1;
2262 }
2263 res = sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
2264 r0_key_data, r0_key_data_len);
2265 }
2266 if (res < 0)
2267 return res;
2268 os_memcpy(pmk_r0, r0_key_data, q);
2269 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, q);
2270 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0Name-Salt", &r0_key_data[q], 16);
2271
2272 /*
2273 * PMKR0Name = Truncate-128(Hash("FT-R0N" || PMK-R0Name-Salt)
2274 */
2275 addr[0] = (const u8 *) "FT-R0N";
2276 len[0] = 6;
2277 addr[1] = &r0_key_data[q];
2278 len[1] = 16;
2279
2280 res = -1;
2281 #ifdef CONFIG_SHA512
2282 if (q == SHA512_MAC_LEN)
2283 res = sha512_vector(2, addr, len, hash);
2284 #endif /* CONFIG_SHA512 */
2285 #ifdef CONFIG_SHA384
2286 if (q == SHA384_MAC_LEN)
2287 res = sha384_vector(2, addr, len, hash);
2288 #endif /* CONFIG_SHA384 */
2289 if (q == SHA256_MAC_LEN)
2290 res = sha256_vector(2, addr, len, hash);
2291 if (res < 0) {
2292 wpa_printf(MSG_DEBUG,
2293 "FT: Failed to derive PMKR0Name (PMK-R0 len %zu)",
2294 q);
2295 return res;
2296 }
2297 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
2298 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
2299 forced_memzero(r0_key_data, sizeof(r0_key_data));
2300 return 0;
2301 }
2302
2303
2304 /**
2305 * wpa_derive_pmk_r1_name - Derive PMKR1Name
2306 *
2307 * IEEE Std 802.11r-2008 - 8.5.1.5.4
2308 */
wpa_derive_pmk_r1_name(const u8 * pmk_r0_name,const u8 * r1kh_id,const u8 * s1kh_id,u8 * pmk_r1_name,size_t pmk_r1_len)2309 int wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
2310 const u8 *s1kh_id, u8 *pmk_r1_name,
2311 size_t pmk_r1_len)
2312 {
2313 u8 hash[64];
2314 const u8 *addr[4];
2315 size_t len[4];
2316 int res;
2317 const char *title;
2318
2319 /*
2320 * PMKR1Name = Truncate-128(Hash("FT-R1N" || PMKR0Name ||
2321 * R1KH-ID || S1KH-ID))
2322 */
2323 addr[0] = (const u8 *) "FT-R1N";
2324 len[0] = 6;
2325 addr[1] = pmk_r0_name;
2326 len[1] = WPA_PMK_NAME_LEN;
2327 addr[2] = r1kh_id;
2328 len[2] = FT_R1KH_ID_LEN;
2329 addr[3] = s1kh_id;
2330 len[3] = ETH_ALEN;
2331
2332 res = -1;
2333 #ifdef CONFIG_SHA512
2334 if (pmk_r1_len == SHA512_MAC_LEN) {
2335 title = "FT: PMKR1Name (using SHA512)";
2336 res = sha512_vector(4, addr, len, hash);
2337 }
2338 #endif /* CONFIG_SHA512 */
2339 #ifdef CONFIG_SHA384
2340 if (pmk_r1_len == SHA384_MAC_LEN) {
2341 title = "FT: PMKR1Name (using SHA384)";
2342 res = sha384_vector(4, addr, len, hash);
2343 }
2344 #endif /* CONFIG_SHA384 */
2345 if (pmk_r1_len == SHA256_MAC_LEN) {
2346 title = "FT: PMKR1Name (using SHA256)";
2347 res = sha256_vector(4, addr, len, hash);
2348 }
2349 if (res < 0) {
2350 wpa_printf(MSG_DEBUG,
2351 "FT: Failed to derive PMKR1Name (PMK-R1 len %zu)",
2352 pmk_r1_len);
2353 return res;
2354 }
2355 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
2356 wpa_hexdump(MSG_DEBUG, title, pmk_r1_name, WPA_PMK_NAME_LEN);
2357 return 0;
2358 }
2359
2360
2361 /**
2362 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
2363 *
2364 * IEEE Std 802.11r-2008 - 8.5.1.5.4
2365 */
wpa_derive_pmk_r1(const u8 * pmk_r0,size_t pmk_r0_len,const u8 * pmk_r0_name,const u8 * r1kh_id,const u8 * s1kh_id,u8 * pmk_r1,u8 * pmk_r1_name)2366 int wpa_derive_pmk_r1(const u8 *pmk_r0, size_t pmk_r0_len,
2367 const u8 *pmk_r0_name,
2368 const u8 *r1kh_id, const u8 *s1kh_id,
2369 u8 *pmk_r1, u8 *pmk_r1_name)
2370 {
2371 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
2372 u8 *pos;
2373 int res;
2374
2375 /* PMK-R1 = KDF-Hash(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
2376 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R1 using KDF-SHA%zu",
2377 pmk_r0_len * 8);
2378 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
2379 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", r1kh_id, FT_R1KH_ID_LEN);
2380 wpa_printf(MSG_DEBUG, "FT: S1KH-ID: " MACSTR, MAC2STR(s1kh_id));
2381 pos = buf;
2382 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
2383 pos += FT_R1KH_ID_LEN;
2384 os_memcpy(pos, s1kh_id, ETH_ALEN);
2385 pos += ETH_ALEN;
2386
2387 res = -1;
2388 #ifdef CONFIG_SHA512
2389 if (pmk_r0_len == SHA512_MAC_LEN)
2390 res = sha512_prf(pmk_r0, pmk_r0_len, "FT-R1",
2391 buf, pos - buf, pmk_r1, pmk_r0_len);
2392 #endif /* CONFIG_SHA512 */
2393 #ifdef CONFIG_SHA384
2394 if (pmk_r0_len == SHA384_MAC_LEN)
2395 res = sha384_prf(pmk_r0, pmk_r0_len, "FT-R1",
2396 buf, pos - buf, pmk_r1, pmk_r0_len);
2397 #endif /* CONFIG_SHA384 */
2398 if (pmk_r0_len == SHA256_MAC_LEN)
2399 res = sha256_prf(pmk_r0, pmk_r0_len, "FT-R1",
2400 buf, pos - buf, pmk_r1, pmk_r0_len);
2401 if (res < 0) {
2402 wpa_printf(MSG_ERROR, "FT: Failed to derive PMK-R1");
2403 return res;
2404 }
2405 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r0_len);
2406
2407 return wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id,
2408 pmk_r1_name, pmk_r0_len);
2409 }
2410
2411
2412 /**
2413 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
2414 *
2415 * IEEE Std 802.11r-2008 - 8.5.1.5.5
2416 */
wpa_pmk_r1_to_ptk(const u8 * pmk_r1,size_t pmk_r1_len,const u8 * snonce,const u8 * anonce,const u8 * sta_addr,const u8 * bssid,const u8 * pmk_r1_name,struct wpa_ptk * ptk,u8 * ptk_name,int akmp,int cipher,size_t kdk_len)2417 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, size_t pmk_r1_len,
2418 const u8 *snonce, const u8 *anonce,
2419 const u8 *sta_addr, const u8 *bssid,
2420 const u8 *pmk_r1_name,
2421 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher,
2422 size_t kdk_len)
2423 {
2424 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
2425 u8 *pos, hash[32];
2426 const u8 *addr[6];
2427 size_t len[6];
2428 u8 tmp[2 * WPA_KCK_MAX_LEN + 2 * WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
2429 WPA_KDK_MAX_LEN];
2430 size_t ptk_len, offset;
2431 size_t key_len;
2432 int res;
2433
2434 if (kdk_len > WPA_KDK_MAX_LEN) {
2435 wpa_printf(MSG_ERROR,
2436 "FT: KDK len=%zu exceeds max supported len",
2437 kdk_len);
2438 return -1;
2439 }
2440
2441 if (akmp == WPA_KEY_MGMT_FT_SAE_EXT_KEY &&
2442 (pmk_r1_len == SHA256_MAC_LEN || pmk_r1_len == SHA384_MAC_LEN ||
2443 pmk_r1_len == SHA512_MAC_LEN))
2444 key_len = pmk_r1_len;
2445 else if (wpa_key_mgmt_sha384(akmp))
2446 key_len = SHA384_MAC_LEN;
2447 else
2448 key_len = SHA256_MAC_LEN;
2449
2450 /*
2451 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
2452 * BSSID || STA-ADDR)
2453 */
2454 wpa_printf(MSG_DEBUG, "FT: Derive PTK using KDF-SHA%zu", key_len * 8);
2455 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
2456 wpa_hexdump(MSG_DEBUG, "FT: SNonce", snonce, WPA_NONCE_LEN);
2457 wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN);
2458 wpa_printf(MSG_DEBUG, "FT: BSSID=" MACSTR " STA-ADDR=" MACSTR,
2459 MAC2STR(bssid), MAC2STR(sta_addr));
2460 pos = buf;
2461 os_memcpy(pos, snonce, WPA_NONCE_LEN);
2462 pos += WPA_NONCE_LEN;
2463 os_memcpy(pos, anonce, WPA_NONCE_LEN);
2464 pos += WPA_NONCE_LEN;
2465 os_memcpy(pos, bssid, ETH_ALEN);
2466 pos += ETH_ALEN;
2467 os_memcpy(pos, sta_addr, ETH_ALEN);
2468 pos += ETH_ALEN;
2469
2470 ptk->kck_len = wpa_kck_len(akmp, key_len);
2471 ptk->kck2_len = wpa_kck2_len(akmp);
2472 ptk->kek_len = wpa_kek_len(akmp, key_len);
2473 ptk->kek2_len = wpa_kek2_len(akmp);
2474 ptk->tk_len = wpa_cipher_key_len(cipher);
2475 ptk->kdk_len = kdk_len;
2476 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len +
2477 ptk->kck2_len + ptk->kek2_len + ptk->kdk_len;
2478
2479 res = -1;
2480 #ifdef CONFIG_SHA512
2481 if (key_len == SHA512_MAC_LEN) {
2482 if (pmk_r1_len != SHA512_MAC_LEN) {
2483 wpa_printf(MSG_ERROR,
2484 "FT: Unexpected PMK-R1 length %d (expected %d)",
2485 (int) pmk_r1_len, SHA512_MAC_LEN);
2486 return -1;
2487 }
2488 res = sha512_prf(pmk_r1, pmk_r1_len, "FT-PTK",
2489 buf, pos - buf, tmp, ptk_len);
2490 }
2491 #endif /* CONFIG_SHA512 */
2492 #ifdef CONFIG_SHA384
2493 if (key_len == SHA384_MAC_LEN) {
2494 if (pmk_r1_len != SHA384_MAC_LEN) {
2495 wpa_printf(MSG_ERROR,
2496 "FT: Unexpected PMK-R1 length %d (expected %d)",
2497 (int) pmk_r1_len, SHA384_MAC_LEN);
2498 return -1;
2499 }
2500 res = sha384_prf(pmk_r1, pmk_r1_len, "FT-PTK",
2501 buf, pos - buf, tmp, ptk_len);
2502 }
2503 #endif /* CONFIG_SHA384 */
2504 if (key_len == SHA256_MAC_LEN) {
2505 if (pmk_r1_len != PMK_LEN) {
2506 wpa_printf(MSG_ERROR,
2507 "FT: Unexpected PMK-R1 length %d (expected %d)",
2508 (int) pmk_r1_len, PMK_LEN);
2509 return -1;
2510 }
2511 res = sha256_prf(pmk_r1, pmk_r1_len, "FT-PTK",
2512 buf, pos - buf, tmp, ptk_len);
2513 }
2514 if (res < 0)
2515 return -1;
2516 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", tmp, ptk_len);
2517
2518 /*
2519 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
2520 * ANonce || BSSID || STA-ADDR))
2521 */
2522 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
2523 addr[0] = pmk_r1_name;
2524 len[0] = WPA_PMK_NAME_LEN;
2525 addr[1] = (const u8 *) "FT-PTKN";
2526 len[1] = 7;
2527 addr[2] = snonce;
2528 len[2] = WPA_NONCE_LEN;
2529 addr[3] = anonce;
2530 len[3] = WPA_NONCE_LEN;
2531 addr[4] = bssid;
2532 len[4] = ETH_ALEN;
2533 addr[5] = sta_addr;
2534 len[5] = ETH_ALEN;
2535
2536 if (sha256_vector(6, addr, len, hash) < 0)
2537 return -1;
2538 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
2539
2540 os_memcpy(ptk->kck, tmp, ptk->kck_len);
2541 offset = ptk->kck_len;
2542 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len);
2543 offset += ptk->kek_len;
2544 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len);
2545 offset += ptk->tk_len;
2546 os_memcpy(ptk->kck2, tmp + offset, ptk->kck2_len);
2547 offset += ptk->kck2_len;
2548 os_memcpy(ptk->kek2, tmp + offset, ptk->kek2_len);
2549 offset += ptk->kek2_len;
2550 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len);
2551
2552 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len);
2553 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len);
2554 if (ptk->kck2_len)
2555 wpa_hexdump_key(MSG_DEBUG, "FT: KCK2",
2556 ptk->kck2, ptk->kck2_len);
2557 if (ptk->kek2_len)
2558 wpa_hexdump_key(MSG_DEBUG, "FT: KEK2",
2559 ptk->kek2, ptk->kek2_len);
2560 if (ptk->kdk_len)
2561 wpa_hexdump_key(MSG_DEBUG, "FT: KDK", ptk->kdk, ptk->kdk_len);
2562
2563 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len);
2564 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
2565
2566 forced_memzero(tmp, sizeof(tmp));
2567
2568 return 0;
2569 }
2570
2571 #endif /* CONFIG_IEEE80211R */
2572
2573
2574 /**
2575 * rsn_pmkid - Calculate PMK identifier
2576 * @pmk: Pairwise master key
2577 * @pmk_len: Length of pmk in bytes
2578 * @aa: Authenticator address
2579 * @spa: Supplicant address
2580 * @pmkid: Buffer for PMKID
2581 * @akmp: Negotiated key management protocol
2582 *
2583 * IEEE Std 802.11-2016 - 12.7.1.3 Pairwise key hierarchy
2584 * AKM: 00-0F-AC:3, 00-0F-AC:5, 00-0F-AC:6, 00-0F-AC:14, 00-0F-AC:16
2585 * PMKID = Truncate-128(HMAC-SHA-256(PMK, "PMK Name" || AA || SPA))
2586 * AKM: 00-0F-AC:11
2587 * See rsn_pmkid_suite_b()
2588 * AKM: 00-0F-AC:12
2589 * See rsn_pmkid_suite_b_192()
2590 * AKM: 00-0F-AC:13, 00-0F-AC:15, 00-0F-AC:17
2591 * PMKID = Truncate-128(HMAC-SHA-384(PMK, "PMK Name" || AA || SPA))
2592 * Otherwise:
2593 * PMKID = Truncate-128(HMAC-SHA-1(PMK, "PMK Name" || AA || SPA))
2594 */
rsn_pmkid(const u8 * pmk,size_t pmk_len,const u8 * aa,const u8 * spa,u8 * pmkid,int akmp)2595 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
2596 u8 *pmkid, int akmp)
2597 {
2598 char *title = "PMK Name";
2599 const u8 *addr[3];
2600 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
2601 unsigned char hash[SHA384_MAC_LEN];
2602
2603 addr[0] = (u8 *) title;
2604 addr[1] = aa;
2605 addr[2] = spa;
2606
2607 if (0) {
2608 #if defined(CONFIG_FILS) || defined(CONFIG_SHA384)
2609 } else if (wpa_key_mgmt_sha384(akmp)) {
2610 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-384");
2611 hmac_sha384_vector(pmk, pmk_len, 3, addr, len, hash);
2612 #endif /* CONFIG_FILS || CONFIG_SHA384 */
2613 } else if (wpa_key_mgmt_sha256(akmp)) {
2614 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-256");
2615 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
2616 } else {
2617 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-1");
2618 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
2619 }
2620 wpa_hexdump(MSG_DEBUG, "RSN: Derived PMKID", hash, PMKID_LEN);
2621 os_memcpy(pmkid, hash, PMKID_LEN);
2622 }
2623
2624
2625 #ifdef CONFIG_SUITEB
2626 /**
2627 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM
2628 * @kck: Key confirmation key
2629 * @kck_len: Length of kck in bytes
2630 * @aa: Authenticator address
2631 * @spa: Supplicant address
2632 * @pmkid: Buffer for PMKID
2633 * Returns: 0 on success, -1 on failure
2634 *
2635 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
2636 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA))
2637 */
rsn_pmkid_suite_b(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)2638 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa,
2639 const u8 *spa, u8 *pmkid)
2640 {
2641 char *title = "PMK Name";
2642 const u8 *addr[3];
2643 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
2644 unsigned char hash[SHA256_MAC_LEN];
2645
2646 addr[0] = (u8 *) title;
2647 addr[1] = aa;
2648 addr[2] = spa;
2649
2650 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0)
2651 return -1;
2652 os_memcpy(pmkid, hash, PMKID_LEN);
2653 return 0;
2654 }
2655 #endif /* CONFIG_SUITEB */
2656
2657
2658 #ifdef CONFIG_SUITEB192
2659 /**
2660 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM
2661 * @kck: Key confirmation key
2662 * @kck_len: Length of kck in bytes
2663 * @aa: Authenticator address
2664 * @spa: Supplicant address
2665 * @pmkid: Buffer for PMKID
2666 * Returns: 0 on success, -1 on failure
2667 *
2668 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
2669 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA))
2670 */
rsn_pmkid_suite_b_192(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)2671 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa,
2672 const u8 *spa, u8 *pmkid)
2673 {
2674 char *title = "PMK Name";
2675 const u8 *addr[3];
2676 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
2677 unsigned char hash[SHA384_MAC_LEN];
2678
2679 addr[0] = (u8 *) title;
2680 addr[1] = aa;
2681 addr[2] = spa;
2682
2683 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0)
2684 return -1;
2685 os_memcpy(pmkid, hash, PMKID_LEN);
2686 return 0;
2687 }
2688 #endif /* CONFIG_SUITEB192 */
2689
2690
2691 /**
2692 * wpa_cipher_txt - Convert cipher suite to a text string
2693 * @cipher: Cipher suite (WPA_CIPHER_* enum)
2694 * Returns: Pointer to a text string of the cipher suite name
2695 */
wpa_cipher_txt(int cipher)2696 const char * wpa_cipher_txt(int cipher)
2697 {
2698 switch (cipher) {
2699 case WPA_CIPHER_NONE:
2700 return "NONE";
2701 #ifdef CONFIG_WEP
2702 case WPA_CIPHER_WEP40:
2703 return "WEP-40";
2704 case WPA_CIPHER_WEP104:
2705 return "WEP-104";
2706 #endif /* CONFIG_WEP */
2707 case WPA_CIPHER_TKIP:
2708 return "TKIP";
2709 case WPA_CIPHER_CCMP:
2710 return "CCMP";
2711 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
2712 return "CCMP+TKIP";
2713 case WPA_CIPHER_GCMP:
2714 return "GCMP";
2715 case WPA_CIPHER_GCMP_256:
2716 return "GCMP-256";
2717 case WPA_CIPHER_CCMP_256:
2718 return "CCMP-256";
2719 case WPA_CIPHER_AES_128_CMAC:
2720 return "BIP";
2721 case WPA_CIPHER_BIP_GMAC_128:
2722 return "BIP-GMAC-128";
2723 case WPA_CIPHER_BIP_GMAC_256:
2724 return "BIP-GMAC-256";
2725 case WPA_CIPHER_BIP_CMAC_256:
2726 return "BIP-CMAC-256";
2727 case WPA_CIPHER_GTK_NOT_USED:
2728 return "GTK_NOT_USED";
2729 default:
2730 return "UNKNOWN";
2731 }
2732 }
2733
2734
2735 /**
2736 * wpa_key_mgmt_txt - Convert key management suite to a text string
2737 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
2738 * @proto: WPA/WPA2 version (WPA_PROTO_*)
2739 * Returns: Pointer to a text string of the key management suite name
2740 */
wpa_key_mgmt_txt(int key_mgmt,int proto)2741 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
2742 {
2743 switch (key_mgmt) {
2744 case WPA_KEY_MGMT_IEEE8021X:
2745 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
2746 return "WPA2+WPA/IEEE 802.1X/EAP";
2747 return proto == WPA_PROTO_RSN ?
2748 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
2749 case WPA_KEY_MGMT_PSK:
2750 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
2751 return "WPA2-PSK+WPA-PSK";
2752 return proto == WPA_PROTO_RSN ?
2753 "WPA2-PSK" : "WPA-PSK";
2754 case WPA_KEY_MGMT_NONE:
2755 return "NONE";
2756 case WPA_KEY_MGMT_WPA_NONE:
2757 return "WPA-NONE";
2758 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2759 return "IEEE 802.1X (no WPA)";
2760 #ifdef CONFIG_IEEE80211R
2761 case WPA_KEY_MGMT_FT_IEEE8021X:
2762 return "FT-EAP";
2763 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
2764 return "FT-EAP-SHA384";
2765 case WPA_KEY_MGMT_FT_PSK:
2766 return "FT-PSK";
2767 #endif /* CONFIG_IEEE80211R */
2768 case WPA_KEY_MGMT_IEEE8021X_SHA256:
2769 return "WPA2-EAP-SHA256";
2770 case WPA_KEY_MGMT_PSK_SHA256:
2771 return "WPA2-PSK-SHA256";
2772 case WPA_KEY_MGMT_WPS:
2773 return "WPS";
2774 case WPA_KEY_MGMT_SAE:
2775 return "SAE";
2776 case WPA_KEY_MGMT_SAE_EXT_KEY:
2777 return "SAE-EXT-KEY";
2778 case WPA_KEY_MGMT_FT_SAE:
2779 return "FT-SAE";
2780 case WPA_KEY_MGMT_FT_SAE_EXT_KEY:
2781 return "FT-SAE-EXT-KEY";
2782 case WPA_KEY_MGMT_OSEN:
2783 return "OSEN";
2784 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
2785 return "WPA2-EAP-SUITE-B";
2786 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
2787 return "WPA2-EAP-SUITE-B-192";
2788 case WPA_KEY_MGMT_FILS_SHA256:
2789 return "FILS-SHA256";
2790 case WPA_KEY_MGMT_FILS_SHA384:
2791 return "FILS-SHA384";
2792 case WPA_KEY_MGMT_FT_FILS_SHA256:
2793 return "FT-FILS-SHA256";
2794 case WPA_KEY_MGMT_FT_FILS_SHA384:
2795 return "FT-FILS-SHA384";
2796 case WPA_KEY_MGMT_OWE:
2797 return "OWE";
2798 case WPA_KEY_MGMT_DPP:
2799 return "DPP";
2800 case WPA_KEY_MGMT_PASN:
2801 return "PASN";
2802 case WPA_KEY_MGMT_IEEE8021X_SHA384:
2803 return "WPA2-EAP-SHA384";
2804 default:
2805 return "UNKNOWN";
2806 }
2807 }
2808
2809
wpa_akm_to_suite(int akm)2810 u32 wpa_akm_to_suite(int akm)
2811 {
2812 if (akm & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2813 return RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384;
2814 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
2815 return RSN_AUTH_KEY_MGMT_FT_802_1X;
2816 if (akm & WPA_KEY_MGMT_FT_PSK)
2817 return RSN_AUTH_KEY_MGMT_FT_PSK;
2818 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA384)
2819 return RSN_AUTH_KEY_MGMT_802_1X_SHA384;
2820 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
2821 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
2822 if (akm & WPA_KEY_MGMT_IEEE8021X)
2823 return RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
2824 if (akm & WPA_KEY_MGMT_PSK_SHA256)
2825 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
2826 if (akm & WPA_KEY_MGMT_PSK)
2827 return RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
2828 if (akm & WPA_KEY_MGMT_CCKM)
2829 return RSN_AUTH_KEY_MGMT_CCKM;
2830 if (akm & WPA_KEY_MGMT_OSEN)
2831 return RSN_AUTH_KEY_MGMT_OSEN;
2832 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
2833 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
2834 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
2835 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
2836 if (akm & WPA_KEY_MGMT_FILS_SHA256)
2837 return RSN_AUTH_KEY_MGMT_FILS_SHA256;
2838 if (akm & WPA_KEY_MGMT_FILS_SHA384)
2839 return RSN_AUTH_KEY_MGMT_FILS_SHA384;
2840 if (akm & WPA_KEY_MGMT_FT_FILS_SHA256)
2841 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA256;
2842 if (akm & WPA_KEY_MGMT_FT_FILS_SHA384)
2843 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA384;
2844 if (akm & WPA_KEY_MGMT_SAE)
2845 return RSN_AUTH_KEY_MGMT_SAE;
2846 if (akm & WPA_KEY_MGMT_SAE_EXT_KEY)
2847 return RSN_AUTH_KEY_MGMT_SAE_EXT_KEY;
2848 if (akm & WPA_KEY_MGMT_FT_SAE)
2849 return RSN_AUTH_KEY_MGMT_FT_SAE;
2850 if (akm & WPA_KEY_MGMT_FT_SAE_EXT_KEY)
2851 return RSN_AUTH_KEY_MGMT_FT_SAE_EXT_KEY;
2852 if (akm & WPA_KEY_MGMT_OWE)
2853 return RSN_AUTH_KEY_MGMT_OWE;
2854 if (akm & WPA_KEY_MGMT_DPP)
2855 return RSN_AUTH_KEY_MGMT_DPP;
2856 return 0;
2857 }
2858
2859
wpa_compare_rsn_ie(int ft_initial_assoc,const u8 * ie1,size_t ie1len,const u8 * ie2,size_t ie2len)2860 int wpa_compare_rsn_ie(int ft_initial_assoc,
2861 const u8 *ie1, size_t ie1len,
2862 const u8 *ie2, size_t ie2len)
2863 {
2864 if (ie1 == NULL || ie2 == NULL)
2865 return -1;
2866
2867 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
2868 return 0; /* identical IEs */
2869
2870 #ifdef CONFIG_IEEE80211R
2871 if (ft_initial_assoc) {
2872 struct wpa_ie_data ie1d, ie2d;
2873 /*
2874 * The PMKID-List in RSN IE is different between Beacon/Probe
2875 * Response/(Re)Association Request frames and EAPOL-Key
2876 * messages in FT initial mobility domain association. Allow
2877 * for this, but verify that other parts of the RSN IEs are
2878 * identical.
2879 */
2880 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
2881 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
2882 return -1;
2883 if (ie1d.proto == ie2d.proto &&
2884 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
2885 ie1d.group_cipher == ie2d.group_cipher &&
2886 ie1d.key_mgmt == ie2d.key_mgmt &&
2887 ie1d.capabilities == ie2d.capabilities &&
2888 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
2889 return 0;
2890 }
2891 #endif /* CONFIG_IEEE80211R */
2892
2893 return -1;
2894 }
2895
2896
wpa_insert_pmkid(u8 * ies,size_t * ies_len,const u8 * pmkid)2897 int wpa_insert_pmkid(u8 *ies, size_t *ies_len, const u8 *pmkid)
2898 {
2899 u8 *start, *end, *rpos, *rend;
2900 int added = 0;
2901
2902 start = ies;
2903 end = ies + *ies_len;
2904
2905 while (start < end) {
2906 if (*start == WLAN_EID_RSN)
2907 break;
2908 start += 2 + start[1];
2909 }
2910 if (start >= end) {
2911 wpa_printf(MSG_ERROR, "RSN: Could not find RSNE in IEs data");
2912 return -1;
2913 }
2914 wpa_hexdump(MSG_DEBUG, "RSN: RSNE before modification",
2915 start, 2 + start[1]);
2916
2917 /* Find start of PMKID-Count */
2918 rpos = start + 2;
2919 rend = rpos + start[1];
2920
2921 /* Skip Version and Group Data Cipher Suite */
2922 rpos += 2 + 4;
2923 /* Skip Pairwise Cipher Suite Count and List */
2924 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
2925 /* Skip AKM Suite Count and List */
2926 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
2927
2928 if (rpos == rend) {
2929 /* Add RSN Capabilities */
2930 os_memmove(rpos + 2, rpos, end - rpos);
2931 *rpos++ = 0;
2932 *rpos++ = 0;
2933 added += 2;
2934 start[1] += 2;
2935 rend = rpos;
2936 } else {
2937 /* Skip RSN Capabilities */
2938 rpos += 2;
2939 if (rpos > rend) {
2940 wpa_printf(MSG_ERROR,
2941 "RSN: Could not parse RSNE in IEs data");
2942 return -1;
2943 }
2944 }
2945
2946 if (rpos == rend) {
2947 /* No PMKID-Count field included; add it */
2948 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos);
2949 WPA_PUT_LE16(rpos, 1);
2950 rpos += 2;
2951 os_memcpy(rpos, pmkid, PMKID_LEN);
2952 added += 2 + PMKID_LEN;
2953 start[1] += 2 + PMKID_LEN;
2954 } else {
2955 u16 num_pmkid;
2956
2957 if (rend - rpos < 2)
2958 return -1;
2959 num_pmkid = WPA_GET_LE16(rpos);
2960 /* PMKID-Count was included; use it */
2961 if (num_pmkid != 0) {
2962 u8 *after;
2963
2964 if (num_pmkid * PMKID_LEN > rend - rpos - 2)
2965 return -1;
2966 /*
2967 * PMKID may have been included in RSN IE in
2968 * (Re)Association Request frame, so remove the old
2969 * PMKID(s) first before adding the new one.
2970 */
2971 wpa_printf(MSG_DEBUG,
2972 "RSN: Remove %u old PMKID(s) from RSNE",
2973 num_pmkid);
2974 after = rpos + 2 + num_pmkid * PMKID_LEN;
2975 os_memmove(rpos + 2, after, end - after);
2976 start[1] -= num_pmkid * PMKID_LEN;
2977 added -= num_pmkid * PMKID_LEN;
2978 }
2979 WPA_PUT_LE16(rpos, 1);
2980 rpos += 2;
2981 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos);
2982 os_memcpy(rpos, pmkid, PMKID_LEN);
2983 added += PMKID_LEN;
2984 start[1] += PMKID_LEN;
2985 }
2986
2987 wpa_hexdump(MSG_DEBUG, "RSN: RSNE after modification (PMKID inserted)",
2988 start, 2 + start[1]);
2989
2990 *ies_len += added;
2991
2992 return 0;
2993 }
2994
2995
wpa_cipher_key_len(int cipher)2996 int wpa_cipher_key_len(int cipher)
2997 {
2998 switch (cipher) {
2999 case WPA_CIPHER_CCMP_256:
3000 case WPA_CIPHER_GCMP_256:
3001 case WPA_CIPHER_BIP_GMAC_256:
3002 case WPA_CIPHER_BIP_CMAC_256:
3003 return 32;
3004 case WPA_CIPHER_CCMP:
3005 case WPA_CIPHER_GCMP:
3006 case WPA_CIPHER_AES_128_CMAC:
3007 case WPA_CIPHER_BIP_GMAC_128:
3008 return 16;
3009 case WPA_CIPHER_TKIP:
3010 return 32;
3011 default:
3012 return 0;
3013 }
3014 }
3015
3016
wpa_cipher_rsc_len(int cipher)3017 int wpa_cipher_rsc_len(int cipher)
3018 {
3019 switch (cipher) {
3020 case WPA_CIPHER_CCMP_256:
3021 case WPA_CIPHER_GCMP_256:
3022 case WPA_CIPHER_CCMP:
3023 case WPA_CIPHER_GCMP:
3024 case WPA_CIPHER_TKIP:
3025 return 6;
3026 default:
3027 return 0;
3028 }
3029 }
3030
3031
wpa_cipher_to_alg(int cipher)3032 enum wpa_alg wpa_cipher_to_alg(int cipher)
3033 {
3034 switch (cipher) {
3035 case WPA_CIPHER_CCMP_256:
3036 return WPA_ALG_CCMP_256;
3037 case WPA_CIPHER_GCMP_256:
3038 return WPA_ALG_GCMP_256;
3039 case WPA_CIPHER_CCMP:
3040 return WPA_ALG_CCMP;
3041 case WPA_CIPHER_GCMP:
3042 return WPA_ALG_GCMP;
3043 case WPA_CIPHER_TKIP:
3044 return WPA_ALG_TKIP;
3045 case WPA_CIPHER_AES_128_CMAC:
3046 return WPA_ALG_BIP_CMAC_128;
3047 case WPA_CIPHER_BIP_GMAC_128:
3048 return WPA_ALG_BIP_GMAC_128;
3049 case WPA_CIPHER_BIP_GMAC_256:
3050 return WPA_ALG_BIP_GMAC_256;
3051 case WPA_CIPHER_BIP_CMAC_256:
3052 return WPA_ALG_BIP_CMAC_256;
3053 default:
3054 return WPA_ALG_NONE;
3055 }
3056 }
3057
3058
wpa_cipher_valid_pairwise(int cipher)3059 int wpa_cipher_valid_pairwise(int cipher)
3060 {
3061 #ifdef CONFIG_NO_TKIP
3062 return cipher == WPA_CIPHER_CCMP_256 ||
3063 cipher == WPA_CIPHER_GCMP_256 ||
3064 cipher == WPA_CIPHER_CCMP ||
3065 cipher == WPA_CIPHER_GCMP;
3066 #else /* CONFIG_NO_TKIP */
3067 return cipher == WPA_CIPHER_CCMP_256 ||
3068 cipher == WPA_CIPHER_GCMP_256 ||
3069 cipher == WPA_CIPHER_CCMP ||
3070 cipher == WPA_CIPHER_GCMP ||
3071 cipher == WPA_CIPHER_TKIP;
3072 #endif /* CONFIG_NO_TKIP */
3073 }
3074
3075
wpa_cipher_to_suite(int proto,int cipher)3076 u32 wpa_cipher_to_suite(int proto, int cipher)
3077 {
3078 if (cipher & WPA_CIPHER_CCMP_256)
3079 return RSN_CIPHER_SUITE_CCMP_256;
3080 if (cipher & WPA_CIPHER_GCMP_256)
3081 return RSN_CIPHER_SUITE_GCMP_256;
3082 if (cipher & WPA_CIPHER_CCMP)
3083 return (proto == WPA_PROTO_RSN ?
3084 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
3085 if (cipher & WPA_CIPHER_GCMP)
3086 return RSN_CIPHER_SUITE_GCMP;
3087 if (cipher & WPA_CIPHER_TKIP)
3088 return (proto == WPA_PROTO_RSN ?
3089 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
3090 if (cipher & WPA_CIPHER_NONE)
3091 return (proto == WPA_PROTO_RSN ?
3092 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
3093 if (cipher & WPA_CIPHER_GTK_NOT_USED)
3094 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
3095 if (cipher & WPA_CIPHER_AES_128_CMAC)
3096 return RSN_CIPHER_SUITE_AES_128_CMAC;
3097 if (cipher & WPA_CIPHER_BIP_GMAC_128)
3098 return RSN_CIPHER_SUITE_BIP_GMAC_128;
3099 if (cipher & WPA_CIPHER_BIP_GMAC_256)
3100 return RSN_CIPHER_SUITE_BIP_GMAC_256;
3101 if (cipher & WPA_CIPHER_BIP_CMAC_256)
3102 return RSN_CIPHER_SUITE_BIP_CMAC_256;
3103 return 0;
3104 }
3105
3106
rsn_cipher_put_suites(u8 * start,int ciphers)3107 int rsn_cipher_put_suites(u8 *start, int ciphers)
3108 {
3109 u8 *pos = start;
3110
3111 if (ciphers & WPA_CIPHER_CCMP_256) {
3112 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
3113 pos += RSN_SELECTOR_LEN;
3114 }
3115 if (ciphers & WPA_CIPHER_GCMP_256) {
3116 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
3117 pos += RSN_SELECTOR_LEN;
3118 }
3119 if (ciphers & WPA_CIPHER_CCMP) {
3120 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
3121 pos += RSN_SELECTOR_LEN;
3122 }
3123 if (ciphers & WPA_CIPHER_GCMP) {
3124 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
3125 pos += RSN_SELECTOR_LEN;
3126 }
3127 if (ciphers & WPA_CIPHER_TKIP) {
3128 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
3129 pos += RSN_SELECTOR_LEN;
3130 }
3131 if (ciphers & WPA_CIPHER_NONE) {
3132 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
3133 pos += RSN_SELECTOR_LEN;
3134 }
3135
3136 return (pos - start) / RSN_SELECTOR_LEN;
3137 }
3138
3139
wpa_cipher_put_suites(u8 * start,int ciphers)3140 int wpa_cipher_put_suites(u8 *start, int ciphers)
3141 {
3142 u8 *pos = start;
3143
3144 if (ciphers & WPA_CIPHER_CCMP) {
3145 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
3146 pos += WPA_SELECTOR_LEN;
3147 }
3148 if (ciphers & WPA_CIPHER_TKIP) {
3149 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
3150 pos += WPA_SELECTOR_LEN;
3151 }
3152 if (ciphers & WPA_CIPHER_NONE) {
3153 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
3154 pos += WPA_SELECTOR_LEN;
3155 }
3156
3157 return (pos - start) / RSN_SELECTOR_LEN;
3158 }
3159
3160
wpa_pick_pairwise_cipher(int ciphers,int none_allowed)3161 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
3162 {
3163 if (ciphers & WPA_CIPHER_CCMP_256)
3164 return WPA_CIPHER_CCMP_256;
3165 if (ciphers & WPA_CIPHER_GCMP_256)
3166 return WPA_CIPHER_GCMP_256;
3167 if (ciphers & WPA_CIPHER_CCMP)
3168 return WPA_CIPHER_CCMP;
3169 if (ciphers & WPA_CIPHER_GCMP)
3170 return WPA_CIPHER_GCMP;
3171 if (ciphers & WPA_CIPHER_TKIP)
3172 return WPA_CIPHER_TKIP;
3173 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
3174 return WPA_CIPHER_NONE;
3175 return -1;
3176 }
3177
3178
wpa_pick_group_cipher(int ciphers)3179 int wpa_pick_group_cipher(int ciphers)
3180 {
3181 if (ciphers & WPA_CIPHER_CCMP_256)
3182 return WPA_CIPHER_CCMP_256;
3183 if (ciphers & WPA_CIPHER_GCMP_256)
3184 return WPA_CIPHER_GCMP_256;
3185 if (ciphers & WPA_CIPHER_CCMP)
3186 return WPA_CIPHER_CCMP;
3187 if (ciphers & WPA_CIPHER_GCMP)
3188 return WPA_CIPHER_GCMP;
3189 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
3190 return WPA_CIPHER_GTK_NOT_USED;
3191 if (ciphers & WPA_CIPHER_TKIP)
3192 return WPA_CIPHER_TKIP;
3193 return -1;
3194 }
3195
3196
wpa_parse_cipher(const char * value)3197 int wpa_parse_cipher(const char *value)
3198 {
3199 int val = 0, last;
3200 char *start, *end, *buf;
3201
3202 buf = os_strdup(value);
3203 if (buf == NULL)
3204 return -1;
3205 start = buf;
3206
3207 while (*start != '\0') {
3208 while (*start == ' ' || *start == '\t')
3209 start++;
3210 if (*start == '\0')
3211 break;
3212 end = start;
3213 while (*end != ' ' && *end != '\t' && *end != '\0')
3214 end++;
3215 last = *end == '\0';
3216 *end = '\0';
3217 if (os_strcmp(start, "CCMP-256") == 0)
3218 val |= WPA_CIPHER_CCMP_256;
3219 else if (os_strcmp(start, "GCMP-256") == 0)
3220 val |= WPA_CIPHER_GCMP_256;
3221 else if (os_strcmp(start, "CCMP") == 0)
3222 val |= WPA_CIPHER_CCMP;
3223 else if (os_strcmp(start, "GCMP") == 0)
3224 val |= WPA_CIPHER_GCMP;
3225 #ifndef CONFIG_NO_TKIP
3226 else if (os_strcmp(start, "TKIP") == 0)
3227 val |= WPA_CIPHER_TKIP;
3228 #endif /* CONFIG_NO_TKIP */
3229 #ifdef CONFIG_WEP
3230 else if (os_strcmp(start, "WEP104") == 0)
3231 val |= WPA_CIPHER_WEP104;
3232 else if (os_strcmp(start, "WEP40") == 0)
3233 val |= WPA_CIPHER_WEP40;
3234 #endif /* CONFIG_WEP */
3235 else if (os_strcmp(start, "NONE") == 0)
3236 val |= WPA_CIPHER_NONE;
3237 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
3238 val |= WPA_CIPHER_GTK_NOT_USED;
3239 else if (os_strcmp(start, "AES-128-CMAC") == 0)
3240 val |= WPA_CIPHER_AES_128_CMAC;
3241 else if (os_strcmp(start, "BIP-GMAC-128") == 0)
3242 val |= WPA_CIPHER_BIP_GMAC_128;
3243 else if (os_strcmp(start, "BIP-GMAC-256") == 0)
3244 val |= WPA_CIPHER_BIP_GMAC_256;
3245 else if (os_strcmp(start, "BIP-CMAC-256") == 0)
3246 val |= WPA_CIPHER_BIP_CMAC_256;
3247 else {
3248 os_free(buf);
3249 return -1;
3250 }
3251
3252 if (last)
3253 break;
3254 start = end + 1;
3255 }
3256 os_free(buf);
3257
3258 return val;
3259 }
3260
3261
wpa_write_ciphers(char * start,char * end,int ciphers,const char * delim)3262 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
3263 {
3264 char *pos = start;
3265 int ret;
3266
3267 if (ciphers & WPA_CIPHER_CCMP_256) {
3268 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
3269 pos == start ? "" : delim);
3270 if (os_snprintf_error(end - pos, ret))
3271 return -1;
3272 pos += ret;
3273 }
3274 if (ciphers & WPA_CIPHER_GCMP_256) {
3275 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
3276 pos == start ? "" : delim);
3277 if (os_snprintf_error(end - pos, ret))
3278 return -1;
3279 pos += ret;
3280 }
3281 if (ciphers & WPA_CIPHER_CCMP) {
3282 ret = os_snprintf(pos, end - pos, "%sCCMP",
3283 pos == start ? "" : delim);
3284 if (os_snprintf_error(end - pos, ret))
3285 return -1;
3286 pos += ret;
3287 }
3288 if (ciphers & WPA_CIPHER_GCMP) {
3289 ret = os_snprintf(pos, end - pos, "%sGCMP",
3290 pos == start ? "" : delim);
3291 if (os_snprintf_error(end - pos, ret))
3292 return -1;
3293 pos += ret;
3294 }
3295 if (ciphers & WPA_CIPHER_TKIP) {
3296 ret = os_snprintf(pos, end - pos, "%sTKIP",
3297 pos == start ? "" : delim);
3298 if (os_snprintf_error(end - pos, ret))
3299 return -1;
3300 pos += ret;
3301 }
3302 if (ciphers & WPA_CIPHER_AES_128_CMAC) {
3303 ret = os_snprintf(pos, end - pos, "%sAES-128-CMAC",
3304 pos == start ? "" : delim);
3305 if (os_snprintf_error(end - pos, ret))
3306 return -1;
3307 pos += ret;
3308 }
3309 if (ciphers & WPA_CIPHER_BIP_GMAC_128) {
3310 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-128",
3311 pos == start ? "" : delim);
3312 if (os_snprintf_error(end - pos, ret))
3313 return -1;
3314 pos += ret;
3315 }
3316 if (ciphers & WPA_CIPHER_BIP_GMAC_256) {
3317 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-256",
3318 pos == start ? "" : delim);
3319 if (os_snprintf_error(end - pos, ret))
3320 return -1;
3321 pos += ret;
3322 }
3323 if (ciphers & WPA_CIPHER_BIP_CMAC_256) {
3324 ret = os_snprintf(pos, end - pos, "%sBIP-CMAC-256",
3325 pos == start ? "" : delim);
3326 if (os_snprintf_error(end - pos, ret))
3327 return -1;
3328 pos += ret;
3329 }
3330 if (ciphers & WPA_CIPHER_NONE) {
3331 ret = os_snprintf(pos, end - pos, "%sNONE",
3332 pos == start ? "" : delim);
3333 if (os_snprintf_error(end - pos, ret))
3334 return -1;
3335 pos += ret;
3336 }
3337
3338 return pos - start;
3339 }
3340
3341
wpa_select_ap_group_cipher(int wpa,int wpa_pairwise,int rsn_pairwise)3342 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
3343 {
3344 int pairwise = 0;
3345
3346 /* Select group cipher based on the enabled pairwise cipher suites */
3347 if (wpa & 1)
3348 pairwise |= wpa_pairwise;
3349 if (wpa & 2)
3350 pairwise |= rsn_pairwise;
3351
3352 if (pairwise & WPA_CIPHER_TKIP)
3353 return WPA_CIPHER_TKIP;
3354 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
3355 return WPA_CIPHER_GCMP;
3356 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
3357 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
3358 return WPA_CIPHER_GCMP_256;
3359 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
3360 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
3361 return WPA_CIPHER_CCMP_256;
3362 return WPA_CIPHER_CCMP;
3363 }
3364
3365
3366 #ifdef CONFIG_FILS
fils_domain_name_hash(const char * domain,u8 * hash)3367 int fils_domain_name_hash(const char *domain, u8 *hash)
3368 {
3369 char buf[255], *wpos = buf;
3370 const char *pos = domain;
3371 size_t len;
3372 const u8 *addr[1];
3373 u8 mac[SHA256_MAC_LEN];
3374
3375 for (len = 0; len < sizeof(buf) && *pos; len++) {
3376 if (isalpha(*pos) && isupper(*pos))
3377 *wpos++ = tolower(*pos);
3378 else
3379 *wpos++ = *pos;
3380 pos++;
3381 }
3382
3383 addr[0] = (const u8 *) buf;
3384 if (sha256_vector(1, addr, &len, mac) < 0)
3385 return -1;
3386 os_memcpy(hash, mac, 2);
3387 return 0;
3388 }
3389 #endif /* CONFIG_FILS */
3390
3391
3392 /**
3393 * wpa_parse_vendor_specific - Parse Vendor Specific IEs
3394 * @pos: Pointer to the IE header
3395 * @end: Pointer to the end of the Key Data buffer
3396 * @ie: Pointer to parsed IE data
3397 */
wpa_parse_vendor_specific(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)3398 static void wpa_parse_vendor_specific(const u8 *pos, const u8 *end,
3399 struct wpa_eapol_ie_parse *ie)
3400 {
3401 unsigned int oui;
3402
3403 if (pos[1] < 4) {
3404 wpa_printf(MSG_MSGDUMP,
3405 "Too short vendor specific IE ignored (len=%u)",
3406 pos[1]);
3407 return;
3408 }
3409
3410 oui = WPA_GET_BE24(&pos[2]);
3411 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) {
3412 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) {
3413 ie->wmm = &pos[2];
3414 ie->wmm_len = pos[1];
3415 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE",
3416 ie->wmm, ie->wmm_len);
3417 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) {
3418 ie->wmm = &pos[2];
3419 ie->wmm_len = pos[1];
3420 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element",
3421 ie->wmm, ie->wmm_len);
3422 }
3423 }
3424 }
3425
3426
3427 /**
3428 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
3429 * @pos: Pointer to the IE header
3430 * @ie: Pointer to parsed IE data
3431 * Returns: 0 on success, 1 if end mark is found, 2 if KDE is not recognized
3432 */
wpa_parse_generic(const u8 * pos,struct wpa_eapol_ie_parse * ie)3433 static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie)
3434 {
3435 u8 len = pos[1];
3436 size_t dlen = 2 + len;
3437 u32 selector;
3438 const u8 *p;
3439 size_t left;
3440 u8 link_id;
3441 char title[50];
3442 int ret;
3443
3444 if (len == 0)
3445 return 1;
3446
3447 if (len < RSN_SELECTOR_LEN)
3448 return 2;
3449
3450 p = pos + 2;
3451 selector = RSN_SELECTOR_GET(p);
3452 p += RSN_SELECTOR_LEN;
3453 left = len - RSN_SELECTOR_LEN;
3454
3455 if (left >= 2 && selector == WPA_OUI_TYPE && p[0] == 1 && p[1] == 0) {
3456 ie->wpa_ie = pos;
3457 ie->wpa_ie_len = dlen;
3458 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
3459 ie->wpa_ie, ie->wpa_ie_len);
3460 return 0;
3461 }
3462
3463 if (selector == OSEN_IE_VENDOR_TYPE) {
3464 ie->osen = pos;
3465 ie->osen_len = dlen;
3466 return 0;
3467 }
3468
3469 if (left >= PMKID_LEN && selector == RSN_KEY_DATA_PMKID) {
3470 ie->pmkid = p;
3471 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key", pos, dlen);
3472 return 0;
3473 }
3474
3475 if (left >= 2 && selector == RSN_KEY_DATA_KEYID) {
3476 ie->key_id = p;
3477 wpa_hexdump(MSG_DEBUG, "WPA: KeyID in EAPOL-Key", pos, dlen);
3478 return 0;
3479 }
3480
3481 if (left > 2 && selector == RSN_KEY_DATA_GROUPKEY) {
3482 ie->gtk = p;
3483 ie->gtk_len = left;
3484 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key", pos, dlen);
3485 return 0;
3486 }
3487
3488 if (left >= ETH_ALEN && selector == RSN_KEY_DATA_MAC_ADDR) {
3489 ie->mac_addr = p;
3490 wpa_printf(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key: " MACSTR,
3491 MAC2STR(ie->mac_addr));
3492 return 0;
3493 }
3494
3495 if (left > 2 && selector == RSN_KEY_DATA_IGTK) {
3496 ie->igtk = p;
3497 ie->igtk_len = left;
3498 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
3499 pos, dlen);
3500 return 0;
3501 }
3502
3503 if (left > 2 && selector == RSN_KEY_DATA_BIGTK) {
3504 ie->bigtk = p;
3505 ie->bigtk_len = left;
3506 wpa_hexdump_key(MSG_DEBUG, "WPA: BIGTK in EAPOL-Key",
3507 pos, dlen);
3508 return 0;
3509 }
3510
3511 if (left >= 1 && selector == WFA_KEY_DATA_IP_ADDR_REQ) {
3512 ie->ip_addr_req = p;
3513 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
3514 ie->ip_addr_req, left);
3515 return 0;
3516 }
3517
3518 if (left >= 3 * 4 && selector == WFA_KEY_DATA_IP_ADDR_ALLOC) {
3519 ie->ip_addr_alloc = p;
3520 wpa_hexdump(MSG_DEBUG,
3521 "WPA: IP Address Allocation in EAPOL-Key",
3522 ie->ip_addr_alloc, left);
3523 return 0;
3524 }
3525
3526 if (left > 2 && selector == RSN_KEY_DATA_OCI) {
3527 ie->oci = p;
3528 ie->oci_len = left;
3529 wpa_hexdump(MSG_DEBUG, "WPA: OCI KDE in EAPOL-Key",
3530 pos, dlen);
3531 return 0;
3532 }
3533
3534 if (left >= 1 && selector == WFA_KEY_DATA_TRANSITION_DISABLE) {
3535 ie->transition_disable = p;
3536 ie->transition_disable_len = left;
3537 wpa_hexdump(MSG_DEBUG,
3538 "WPA: Transition Disable KDE in EAPOL-Key",
3539 pos, dlen);
3540 return 0;
3541 }
3542
3543 if (left >= 2 && selector == WFA_KEY_DATA_DPP) {
3544 ie->dpp_kde = p;
3545 ie->dpp_kde_len = left;
3546 wpa_hexdump(MSG_DEBUG, "WPA: DPP KDE in EAPOL-Key", pos, dlen);
3547 return 0;
3548 }
3549
3550 if (left >= RSN_MLO_GTK_KDE_PREFIX_LENGTH &&
3551 selector == RSN_KEY_DATA_MLO_GTK) {
3552 link_id = (p[0] & RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_MASK) >>
3553 RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_SHIFT;
3554 if (link_id >= MAX_NUM_MLO_LINKS)
3555 return 2;
3556
3557 ie->valid_mlo_gtks |= BIT(link_id);
3558 ie->mlo_gtk[link_id] = p;
3559 ie->mlo_gtk_len[link_id] = left;
3560 ret = os_snprintf(title, sizeof(title),
3561 "RSN: Link ID %u - MLO GTK KDE in EAPOL-Key",
3562 link_id);
3563 if (!os_snprintf_error(sizeof(title), ret))
3564 wpa_hexdump_key(MSG_DEBUG, title, pos, dlen);
3565 return 0;
3566 }
3567
3568 if (left >= RSN_MLO_IGTK_KDE_PREFIX_LENGTH &&
3569 selector == RSN_KEY_DATA_MLO_IGTK) {
3570 link_id = (p[8] & RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_MASK) >>
3571 RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_SHIFT;
3572 if (link_id >= MAX_NUM_MLO_LINKS)
3573 return 2;
3574
3575 ie->valid_mlo_igtks |= BIT(link_id);
3576 ie->mlo_igtk[link_id] = p;
3577 ie->mlo_igtk_len[link_id] = left;
3578 ret = os_snprintf(title, sizeof(title),
3579 "RSN: Link ID %u - MLO IGTK KDE in EAPOL-Key",
3580 link_id);
3581 if (!os_snprintf_error(sizeof(title), ret))
3582 wpa_hexdump_key(MSG_DEBUG, title, pos, dlen);
3583 return 0;
3584 }
3585
3586 if (left >= RSN_MLO_BIGTK_KDE_PREFIX_LENGTH &&
3587 selector == RSN_KEY_DATA_MLO_BIGTK) {
3588 link_id = (p[8] & RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_MASK) >>
3589 RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_SHIFT;
3590 if (link_id >= MAX_NUM_MLO_LINKS)
3591 return 2;
3592
3593 ie->valid_mlo_bigtks |= BIT(link_id);
3594 ie->mlo_bigtk[link_id] = p;
3595 ie->mlo_bigtk_len[link_id] = left;
3596 ret = os_snprintf(title, sizeof(title),
3597 "RSN: Link ID %u - MLO BIGTK KDE in EAPOL-Key",
3598 link_id);
3599 if (!os_snprintf_error(sizeof(title), ret))
3600 wpa_hexdump_key(MSG_DEBUG, title, pos, dlen);
3601 return 0;
3602 }
3603
3604 if (left >= RSN_MLO_LINK_KDE_FIXED_LENGTH &&
3605 selector == RSN_KEY_DATA_MLO_LINK) {
3606 link_id = (p[0] & RSN_MLO_LINK_KDE_LI_LINK_ID_MASK) >>
3607 RSN_MLO_LINK_KDE_LI_LINK_ID_SHIFT;
3608 if (link_id >= MAX_NUM_MLO_LINKS)
3609 return 2;
3610
3611 ie->valid_mlo_links |= BIT(link_id);
3612 ie->mlo_link[link_id] = p;
3613 ie->mlo_link_len[link_id] = left;
3614 ret = os_snprintf(title, sizeof(title),
3615 "RSN: Link ID %u - MLO Link KDE in EAPOL-Key",
3616 link_id);
3617 if (!os_snprintf_error(sizeof(title), ret))
3618 wpa_hexdump(MSG_DEBUG, title, pos, dlen);
3619 return 0;
3620 }
3621
3622 return 2;
3623 }
3624
3625
3626 /**
3627 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs
3628 * @buf: Pointer to the Key Data buffer
3629 * @len: Key Data Length
3630 * @ie: Pointer to parsed IE data
3631 * Returns: 0 on success, -1 on failure
3632 */
wpa_parse_kde_ies(const u8 * buf,size_t len,struct wpa_eapol_ie_parse * ie)3633 int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie)
3634 {
3635 const u8 *pos, *end;
3636 int ret = 0;
3637 size_t dlen = 0;
3638
3639 os_memset(ie, 0, sizeof(*ie));
3640 for (pos = buf, end = pos + len; end - pos > 1; pos += dlen) {
3641 if (pos[0] == 0xdd &&
3642 ((pos == buf + len - 1) || pos[1] == 0)) {
3643 /* Ignore padding */
3644 break;
3645 }
3646 dlen = 2 + pos[1];
3647 if ((int) dlen > end - pos) {
3648 wpa_printf(MSG_DEBUG,
3649 "WPA: EAPOL-Key Key Data underflow (ie=%d len=%d pos=%d)",
3650 pos[0], pos[1], (int) (pos - buf));
3651 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", buf, len);
3652 ret = -1;
3653 break;
3654 }
3655 if (*pos == WLAN_EID_RSN) {
3656 ie->rsn_ie = pos;
3657 ie->rsn_ie_len = dlen;
3658 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
3659 ie->rsn_ie, ie->rsn_ie_len);
3660 } else if (*pos == WLAN_EID_RSNX) {
3661 ie->rsnxe = pos;
3662 ie->rsnxe_len = dlen;
3663 wpa_hexdump(MSG_DEBUG, "WPA: RSNXE in EAPOL-Key",
3664 ie->rsnxe, ie->rsnxe_len);
3665 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
3666 ie->mdie = pos;
3667 ie->mdie_len = dlen;
3668 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
3669 ie->mdie, ie->mdie_len);
3670 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
3671 ie->ftie = pos;
3672 ie->ftie_len = dlen;
3673 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
3674 ie->ftie, ie->ftie_len);
3675 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
3676 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
3677 ie->reassoc_deadline = pos;
3678 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
3679 "in EAPOL-Key",
3680 ie->reassoc_deadline, dlen);
3681 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
3682 ie->key_lifetime = pos;
3683 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
3684 "in EAPOL-Key",
3685 ie->key_lifetime, dlen);
3686 } else {
3687 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
3688 "EAPOL-Key Key Data IE",
3689 pos, dlen);
3690 }
3691 } else if (*pos == WLAN_EID_LINK_ID) {
3692 if (pos[1] >= 18) {
3693 ie->lnkid = pos;
3694 ie->lnkid_len = dlen;
3695 }
3696 } else if (*pos == WLAN_EID_EXT_CAPAB) {
3697 ie->ext_capab = pos;
3698 ie->ext_capab_len = dlen;
3699 } else if (*pos == WLAN_EID_SUPP_RATES) {
3700 ie->supp_rates = pos;
3701 ie->supp_rates_len = dlen;
3702 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
3703 ie->ext_supp_rates = pos;
3704 ie->ext_supp_rates_len = dlen;
3705 } else if (*pos == WLAN_EID_HT_CAP &&
3706 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) {
3707 ie->ht_capabilities = pos + 2;
3708 } else if (*pos == WLAN_EID_AID) {
3709 if (pos[1] >= 2)
3710 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff;
3711 } else if (*pos == WLAN_EID_VHT_CAP &&
3712 pos[1] >= sizeof(struct ieee80211_vht_capabilities))
3713 {
3714 ie->vht_capabilities = pos + 2;
3715 } else if (*pos == WLAN_EID_EXTENSION &&
3716 pos[1] >= 1 + IEEE80211_HE_CAPAB_MIN_LEN &&
3717 pos[2] == WLAN_EID_EXT_HE_CAPABILITIES) {
3718 ie->he_capabilities = pos + 3;
3719 ie->he_capab_len = pos[1] - 1;
3720 } else if (*pos == WLAN_EID_EXTENSION &&
3721 pos[1] >= 1 +
3722 sizeof(struct ieee80211_he_6ghz_band_cap) &&
3723 pos[2] == WLAN_EID_EXT_HE_6GHZ_BAND_CAP) {
3724 ie->he_6ghz_capabilities = pos + 3;
3725 } else if (*pos == WLAN_EID_EXTENSION &&
3726 pos[1] >= 1 + IEEE80211_EHT_CAPAB_MIN_LEN &&
3727 pos[2] == WLAN_EID_EXT_EHT_CAPABILITIES) {
3728 ie->eht_capabilities = pos + 3;
3729 ie->eht_capab_len = pos[1] - 1;
3730 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
3731 ie->qosinfo = pos[2];
3732 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
3733 ie->supp_channels = pos + 2;
3734 ie->supp_channels_len = pos[1];
3735 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
3736 /*
3737 * The value of the Length field of the Supported
3738 * Operating Classes element is between 2 and 253.
3739 * Silently skip invalid elements to avoid interop
3740 * issues when trying to use the value.
3741 */
3742 if (pos[1] >= 2 && pos[1] <= 253) {
3743 ie->supp_oper_classes = pos + 2;
3744 ie->supp_oper_classes_len = pos[1];
3745 }
3746 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
3747 ret = wpa_parse_generic(pos, ie);
3748 if (ret == 1) {
3749 /* end mark found */
3750 ret = 0;
3751 break;
3752 }
3753
3754 if (ret == 2) {
3755 /* not a known KDE */
3756 wpa_parse_vendor_specific(pos, end, ie);
3757 }
3758
3759 ret = 0;
3760 } else {
3761 wpa_hexdump(MSG_DEBUG,
3762 "WPA: Unrecognized EAPOL-Key Key Data IE",
3763 pos, dlen);
3764 }
3765 }
3766
3767 return ret;
3768 }
3769
3770
3771 #ifdef CONFIG_PASN
3772
3773 /*
3774 * wpa_pasn_build_auth_header - Add the MAC header and initialize Authentication
3775 * frame for PASN
3776 *
3777 * @buf: Buffer in which the header will be added
3778 * @bssid: The BSSID of the AP
3779 * @src: Source address
3780 * @dst: Destination address
3781 * @trans_seq: Authentication transaction sequence number
3782 * @status: Authentication status
3783 */
wpa_pasn_build_auth_header(struct wpabuf * buf,const u8 * bssid,const u8 * src,const u8 * dst,u8 trans_seq,u16 status)3784 void wpa_pasn_build_auth_header(struct wpabuf *buf, const u8 *bssid,
3785 const u8 *src, const u8 *dst,
3786 u8 trans_seq, u16 status)
3787 {
3788 struct ieee80211_mgmt *auth;
3789
3790 wpa_printf(MSG_DEBUG, "PASN: Add authentication header. trans_seq=%u",
3791 trans_seq);
3792
3793 auth = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
3794 u.auth.variable));
3795
3796 auth->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
3797 (WLAN_FC_STYPE_AUTH << 4));
3798
3799 os_memcpy(auth->da, dst, ETH_ALEN);
3800 os_memcpy(auth->sa, src, ETH_ALEN);
3801 os_memcpy(auth->bssid, bssid, ETH_ALEN);
3802 auth->seq_ctrl = 0;
3803
3804 auth->u.auth.auth_alg = host_to_le16(WLAN_AUTH_PASN);
3805 auth->u.auth.auth_transaction = host_to_le16(trans_seq);
3806 auth->u.auth.status_code = host_to_le16(status);
3807 }
3808
3809
3810 /*
3811 * wpa_pasn_add_rsne - Add an RSNE for PASN authentication
3812 * @buf: Buffer in which the IE will be added
3813 * @pmkid: Optional PMKID. Can be NULL.
3814 * @akmp: Authentication and key management protocol
3815 * @cipher: The cipher suite
3816 */
wpa_pasn_add_rsne(struct wpabuf * buf,const u8 * pmkid,int akmp,int cipher)3817 int wpa_pasn_add_rsne(struct wpabuf *buf, const u8 *pmkid, int akmp, int cipher)
3818 {
3819 struct rsn_ie_hdr *hdr;
3820 u32 suite;
3821 u16 capab;
3822 u8 *pos;
3823 u8 rsne_len;
3824
3825 wpa_printf(MSG_DEBUG, "PASN: Add RSNE");
3826
3827 rsne_len = sizeof(*hdr) + RSN_SELECTOR_LEN +
3828 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN +
3829 2 + RSN_SELECTOR_LEN + 2 + (pmkid ? PMKID_LEN : 0);
3830
3831 if (wpabuf_tailroom(buf) < rsne_len)
3832 return -1;
3833 hdr = wpabuf_put(buf, rsne_len);
3834 hdr->elem_id = WLAN_EID_RSN;
3835 hdr->len = rsne_len - 2;
3836 WPA_PUT_LE16(hdr->version, RSN_VERSION);
3837 pos = (u8 *) (hdr + 1);
3838
3839 /* Group addressed data is not allowed */
3840 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
3841 pos += RSN_SELECTOR_LEN;
3842
3843 /* Add the pairwise cipher */
3844 WPA_PUT_LE16(pos, 1);
3845 pos += 2;
3846 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, cipher);
3847 RSN_SELECTOR_PUT(pos, suite);
3848 pos += RSN_SELECTOR_LEN;
3849
3850 /* Add the AKM suite */
3851 WPA_PUT_LE16(pos, 1);
3852 pos += 2;
3853
3854 switch (akmp) {
3855 case WPA_KEY_MGMT_PASN:
3856 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PASN);
3857 break;
3858 #ifdef CONFIG_SAE
3859 case WPA_KEY_MGMT_SAE:
3860 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
3861 break;
3862 case WPA_KEY_MGMT_SAE_EXT_KEY:
3863 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE_EXT_KEY);
3864 break;
3865 #endif /* CONFIG_SAE */
3866 #ifdef CONFIG_FILS
3867 case WPA_KEY_MGMT_FILS_SHA256:
3868 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256);
3869 break;
3870 case WPA_KEY_MGMT_FILS_SHA384:
3871 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384);
3872 break;
3873 #endif /* CONFIG_FILS */
3874 #ifdef CONFIG_IEEE80211R
3875 case WPA_KEY_MGMT_FT_PSK:
3876 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
3877 break;
3878 case WPA_KEY_MGMT_FT_IEEE8021X:
3879 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
3880 break;
3881 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
3882 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384);
3883 break;
3884 #endif /* CONFIG_IEEE80211R */
3885 default:
3886 wpa_printf(MSG_ERROR, "PASN: Invalid AKMP=0x%x", akmp);
3887 return -1;
3888 }
3889 pos += RSN_SELECTOR_LEN;
3890
3891 /* RSN Capabilities: PASN mandates both MFP capable and required */
3892 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR;
3893 WPA_PUT_LE16(pos, capab);
3894 pos += 2;
3895
3896 if (pmkid) {
3897 wpa_printf(MSG_DEBUG, "PASN: Adding PMKID");
3898
3899 WPA_PUT_LE16(pos, 1);
3900 pos += 2;
3901 os_memcpy(pos, pmkid, PMKID_LEN);
3902 pos += PMKID_LEN;
3903 } else {
3904 WPA_PUT_LE16(pos, 0);
3905 pos += 2;
3906 }
3907
3908 /* Group addressed management is not allowed */
3909 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
3910
3911 return 0;
3912 }
3913
3914
3915 /*
3916 * wpa_pasn_add_parameter_ie - Add PASN Parameters IE for PASN authentication
3917 * @buf: Buffer in which the IE will be added
3918 * @pasn_group: Finite Cyclic Group ID for PASN authentication
3919 * @wrapped_data_format: Format of the data in the Wrapped Data IE
3920 * @pubkey: A buffer holding the local public key. Can be NULL
3921 * @compressed: In case pubkey is included, indicates if the public key is
3922 * compressed (only x coordinate is included) or not (both x and y
3923 * coordinates are included)
3924 * @comeback: A buffer holding the comeback token. Can be NULL
3925 * @after: If comeback is set, defined the comeback time in seconds. -1 to not
3926 * include the Comeback After field (frames from non-AP STA).
3927 */
wpa_pasn_add_parameter_ie(struct wpabuf * buf,u16 pasn_group,u8 wrapped_data_format,const struct wpabuf * pubkey,bool compressed,const struct wpabuf * comeback,int after)3928 void wpa_pasn_add_parameter_ie(struct wpabuf *buf, u16 pasn_group,
3929 u8 wrapped_data_format,
3930 const struct wpabuf *pubkey, bool compressed,
3931 const struct wpabuf *comeback, int after)
3932 {
3933 struct pasn_parameter_ie *params;
3934
3935 wpa_printf(MSG_DEBUG, "PASN: Add PASN Parameters element");
3936
3937 params = wpabuf_put(buf, sizeof(*params));
3938
3939 params->id = WLAN_EID_EXTENSION;
3940 params->len = sizeof(*params) - 2;
3941 params->id_ext = WLAN_EID_EXT_PASN_PARAMS;
3942 params->control = 0;
3943 params->wrapped_data_format = wrapped_data_format;
3944
3945 if (comeback) {
3946 wpa_printf(MSG_DEBUG, "PASN: Adding comeback data");
3947
3948 /*
3949 * 2 octets for the 'after' field + 1 octet for the length +
3950 * actual cookie data
3951 */
3952 if (after >= 0)
3953 params->len += 2;
3954 params->len += 1 + wpabuf_len(comeback);
3955 params->control |= WPA_PASN_CTRL_COMEBACK_INFO_PRESENT;
3956
3957 if (after >= 0)
3958 wpabuf_put_le16(buf, after);
3959 wpabuf_put_u8(buf, wpabuf_len(comeback));
3960 wpabuf_put_buf(buf, comeback);
3961 }
3962
3963 if (pubkey) {
3964 wpa_printf(MSG_DEBUG,
3965 "PASN: Adding public key and group ID %u",
3966 pasn_group);
3967
3968 /*
3969 * 2 octets for the finite cyclic group + 2 octets public key
3970 * length + 1 octet for the compressed/uncompressed indication +
3971 * the actual key.
3972 */
3973 params->len += 2 + 1 + 1 + wpabuf_len(pubkey);
3974 params->control |= WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT;
3975
3976 wpabuf_put_le16(buf, pasn_group);
3977
3978 /*
3979 * The first octet indicates whether the public key is
3980 * compressed, as defined in RFC 5480 section 2.2.
3981 */
3982 wpabuf_put_u8(buf, wpabuf_len(pubkey) + 1);
3983 wpabuf_put_u8(buf, compressed ? WPA_PASN_PUBKEY_COMPRESSED_0 :
3984 WPA_PASN_PUBKEY_UNCOMPRESSED);
3985
3986 wpabuf_put_buf(buf, pubkey);
3987 }
3988 }
3989
3990 /*
3991 * wpa_pasn_add_wrapped_data - Add a Wrapped Data IE to PASN Authentication
3992 * frame. If needed, the Wrapped Data IE would be fragmented.
3993 *
3994 * @buf: Buffer in which the IE will be added
3995 * @wrapped_data_buf: Buffer holding the wrapped data
3996 */
wpa_pasn_add_wrapped_data(struct wpabuf * buf,struct wpabuf * wrapped_data_buf)3997 int wpa_pasn_add_wrapped_data(struct wpabuf *buf,
3998 struct wpabuf *wrapped_data_buf)
3999 {
4000 const u8 *data;
4001 size_t data_len;
4002 u8 len;
4003
4004 if (!wrapped_data_buf)
4005 return 0;
4006
4007 wpa_printf(MSG_DEBUG, "PASN: Add wrapped data");
4008
4009 data = wpabuf_head_u8(wrapped_data_buf);
4010 data_len = wpabuf_len(wrapped_data_buf);
4011
4012 /* nothing to add */
4013 if (!data_len)
4014 return 0;
4015
4016 if (data_len <= 254)
4017 len = 1 + data_len;
4018 else
4019 len = 255;
4020
4021 if (wpabuf_tailroom(buf) < 3 + data_len)
4022 return -1;
4023
4024 wpabuf_put_u8(buf, WLAN_EID_EXTENSION);
4025 wpabuf_put_u8(buf, len);
4026 wpabuf_put_u8(buf, WLAN_EID_EXT_WRAPPED_DATA);
4027 wpabuf_put_data(buf, data, len - 1);
4028
4029 data += len - 1;
4030 data_len -= len - 1;
4031
4032 while (data_len) {
4033 if (wpabuf_tailroom(buf) < 1 + data_len)
4034 return -1;
4035 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT);
4036 len = data_len > 255 ? 255 : data_len;
4037 wpabuf_put_u8(buf, len);
4038 wpabuf_put_data(buf, data, len);
4039 data += len;
4040 data_len -= len;
4041 }
4042
4043 return 0;
4044 }
4045
4046
4047 /*
4048 * wpa_pasn_validate_rsne - Validate PSAN specific data of RSNE
4049 * @data: Parsed representation of an RSNE
4050 * Returns -1 for invalid data; otherwise 0
4051 */
wpa_pasn_validate_rsne(const struct wpa_ie_data * data)4052 int wpa_pasn_validate_rsne(const struct wpa_ie_data *data)
4053 {
4054 u16 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR;
4055
4056 if (data->proto != WPA_PROTO_RSN)
4057 return -1;
4058
4059 if ((data->capabilities & capab) != capab) {
4060 wpa_printf(MSG_DEBUG, "PASN: Invalid RSNE capabilities");
4061 return -1;
4062 }
4063
4064 if (!data->has_group || data->group_cipher != WPA_CIPHER_GTK_NOT_USED) {
4065 wpa_printf(MSG_DEBUG, "PASN: Invalid group data cipher");
4066 return -1;
4067 }
4068
4069 if (!data->has_pairwise || !data->pairwise_cipher ||
4070 (data->pairwise_cipher & (data->pairwise_cipher - 1))) {
4071 wpa_printf(MSG_DEBUG, "PASN: No valid pairwise suite");
4072 return -1;
4073 }
4074
4075 switch (data->key_mgmt) {
4076 #ifdef CONFIG_SAE
4077 case WPA_KEY_MGMT_SAE:
4078 case WPA_KEY_MGMT_SAE_EXT_KEY:
4079 /* fall through */
4080 #endif /* CONFIG_SAE */
4081 #ifdef CONFIG_FILS
4082 case WPA_KEY_MGMT_FILS_SHA256:
4083 case WPA_KEY_MGMT_FILS_SHA384:
4084 /* fall through */
4085 #endif /* CONFIG_FILS */
4086 #ifdef CONFIG_IEEE80211R
4087 case WPA_KEY_MGMT_FT_PSK:
4088 case WPA_KEY_MGMT_FT_IEEE8021X:
4089 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
4090 /* fall through */
4091 #endif /* CONFIG_IEEE80211R */
4092 case WPA_KEY_MGMT_PASN:
4093 break;
4094 default:
4095 wpa_printf(MSG_ERROR, "PASN: invalid key_mgmt: 0x%0x",
4096 data->key_mgmt);
4097 return -1;
4098 }
4099
4100 if (data->mgmt_group_cipher != WPA_CIPHER_GTK_NOT_USED) {
4101 wpa_printf(MSG_DEBUG, "PASN: Invalid group mgmt cipher");
4102 return -1;
4103 }
4104
4105 if (data->num_pmkid > 1) {
4106 wpa_printf(MSG_DEBUG, "PASN: Invalid number of PMKIDs");
4107 return -1;
4108 }
4109
4110 return 0;
4111 }
4112
4113
4114 /*
4115 * wpa_pasn_parse_parameter_ie - Validates PASN Parameters IE
4116 * @data: Pointer to the PASN Parameters IE (starting with the EID).
4117 * @len: Length of the data in the PASN Parameters IE
4118 * @from_ap: Whether this was received from an AP
4119 * @pasn_params: On successful return would hold the parsed PASN parameters.
4120 * Returns: -1 for invalid data; otherwise 0
4121 *
4122 * Note: On successful return, the pointers in &pasn_params point to the data in
4123 * the IE and are not locally allocated (so they should not be freed etc.).
4124 */
wpa_pasn_parse_parameter_ie(const u8 * data,u8 len,bool from_ap,struct wpa_pasn_params_data * pasn_params)4125 int wpa_pasn_parse_parameter_ie(const u8 *data, u8 len, bool from_ap,
4126 struct wpa_pasn_params_data *pasn_params)
4127 {
4128 struct pasn_parameter_ie *params = (struct pasn_parameter_ie *) data;
4129 const u8 *pos = (const u8 *) (params + 1);
4130
4131 if (!pasn_params) {
4132 wpa_printf(MSG_DEBUG, "PASN: Invalid params");
4133 return -1;
4134 }
4135
4136 if (!params || ((size_t) (params->len + 2) < sizeof(*params)) ||
4137 len < sizeof(*params) || params->len + 2 != len) {
4138 wpa_printf(MSG_DEBUG,
4139 "PASN: Invalid parameters IE. len=(%u, %u)",
4140 params ? params->len : 0, len);
4141 return -1;
4142 }
4143
4144 os_memset(pasn_params, 0, sizeof(*pasn_params));
4145
4146 switch (params->wrapped_data_format) {
4147 case WPA_PASN_WRAPPED_DATA_NO:
4148 case WPA_PASN_WRAPPED_DATA_SAE:
4149 case WPA_PASN_WRAPPED_DATA_FILS_SK:
4150 case WPA_PASN_WRAPPED_DATA_FT:
4151 break;
4152 default:
4153 wpa_printf(MSG_DEBUG, "PASN: Invalid wrapped data format");
4154 return -1;
4155 }
4156
4157 pasn_params->wrapped_data_format = params->wrapped_data_format;
4158
4159 len -= sizeof(*params);
4160
4161 if (params->control & WPA_PASN_CTRL_COMEBACK_INFO_PRESENT) {
4162 if (from_ap) {
4163 if (len < 2) {
4164 wpa_printf(MSG_DEBUG,
4165 "PASN: Invalid Parameters IE: Truncated Comeback After");
4166 return -1;
4167 }
4168 pasn_params->after = WPA_GET_LE16(pos);
4169 pos += 2;
4170 len -= 2;
4171 }
4172
4173 if (len < 1 || len < 1 + *pos) {
4174 wpa_printf(MSG_DEBUG,
4175 "PASN: Invalid Parameters IE: comeback len");
4176 return -1;
4177 }
4178
4179 pasn_params->comeback_len = *pos++;
4180 len--;
4181 pasn_params->comeback = pos;
4182 len -= pasn_params->comeback_len;
4183 pos += pasn_params->comeback_len;
4184 }
4185
4186 if (params->control & WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT) {
4187 if (len < 3 || len < 3 + pos[2]) {
4188 wpa_printf(MSG_DEBUG,
4189 "PASN: Invalid Parameters IE: group and key");
4190 return -1;
4191 }
4192
4193 pasn_params->group = WPA_GET_LE16(pos);
4194 pos += 2;
4195 len -= 2;
4196 pasn_params->pubkey_len = *pos++;
4197 len--;
4198 pasn_params->pubkey = pos;
4199 len -= pasn_params->pubkey_len;
4200 pos += pasn_params->pubkey_len;
4201 }
4202
4203 if (len) {
4204 wpa_printf(MSG_DEBUG,
4205 "PASN: Invalid Parameters IE. Bytes left=%u", len);
4206 return -1;
4207 }
4208
4209 return 0;
4210 }
4211
4212
wpa_pasn_add_rsnxe(struct wpabuf * buf,u16 capab)4213 void wpa_pasn_add_rsnxe(struct wpabuf *buf, u16 capab)
4214 {
4215 size_t flen;
4216
4217 flen = (capab & 0xff00) ? 2 : 1;
4218 if (!capab)
4219 return; /* no supported extended RSN capabilities */
4220 if (wpabuf_tailroom(buf) < 2 + flen)
4221 return;
4222 capab |= flen - 1; /* bit 0-3 = Field length (n - 1) */
4223
4224 wpabuf_put_u8(buf, WLAN_EID_RSNX);
4225 wpabuf_put_u8(buf, flen);
4226 wpabuf_put_u8(buf, capab & 0x00ff);
4227 capab >>= 8;
4228 if (capab)
4229 wpabuf_put_u8(buf, capab);
4230 }
4231
4232
4233 /*
4234 * wpa_pasn_add_extra_ies - Add protocol specific IEs in Authentication
4235 * frame for PASN.
4236 *
4237 * @buf: Buffer in which the elements will be added
4238 * @extra_ies: Protocol specific elements to add
4239 * @len: Length of the elements
4240 * Returns: 0 on success, -1 on failure
4241 */
4242
wpa_pasn_add_extra_ies(struct wpabuf * buf,const u8 * extra_ies,size_t len)4243 int wpa_pasn_add_extra_ies(struct wpabuf *buf, const u8 *extra_ies, size_t len)
4244 {
4245 if (!len || !extra_ies || !buf)
4246 return 0;
4247
4248 if (wpabuf_tailroom(buf) < sizeof(len))
4249 return -1;
4250
4251 wpabuf_put_data(buf, extra_ies, len);
4252 return 0;
4253 }
4254
4255 #endif /* CONFIG_PASN */
4256