1 /*
2 * WPA/RSN - Shared functions for supplicant and authenticator
3 * Copyright (c) 2002-2018, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "crypto/md5.h"
13 #include "crypto/sha1.h"
14 #include "crypto/sha256.h"
15 #include "crypto/sha384.h"
16 #include "crypto/sha512.h"
17 #include "crypto/aes_wrap.h"
18 #include "crypto/crypto.h"
19 #include "ieee802_11_defs.h"
20 #include "defs.h"
21 #include "wpa_common.h"
22 #ifdef CONFIG_WAPI
23 #include "securec.h"
24 #endif
25
26
wpa_kck_len(int akmp,size_t pmk_len)27 static unsigned int wpa_kck_len(int akmp, size_t pmk_len)
28 {
29 switch (akmp) {
30 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
31 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
32 return 24;
33 case WPA_KEY_MGMT_FILS_SHA256:
34 case WPA_KEY_MGMT_FT_FILS_SHA256:
35 case WPA_KEY_MGMT_FILS_SHA384:
36 case WPA_KEY_MGMT_FT_FILS_SHA384:
37 return 0;
38 case WPA_KEY_MGMT_DPP:
39 return pmk_len / 2;
40 case WPA_KEY_MGMT_OWE:
41 return pmk_len / 2;
42 default:
43 return 16;
44 }
45 }
46
47
48 #ifdef CONFIG_IEEE80211R
wpa_kck2_len(int akmp)49 static unsigned int wpa_kck2_len(int akmp)
50 {
51 switch (akmp) {
52 case WPA_KEY_MGMT_FT_FILS_SHA256:
53 return 16;
54 case WPA_KEY_MGMT_FT_FILS_SHA384:
55 return 24;
56 default:
57 return 0;
58 }
59 }
60 #endif /* CONFIG_IEEE80211R */
61
62
wpa_kek_len(int akmp,size_t pmk_len)63 static unsigned int wpa_kek_len(int akmp, size_t pmk_len)
64 {
65 switch (akmp) {
66 case WPA_KEY_MGMT_FILS_SHA384:
67 case WPA_KEY_MGMT_FT_FILS_SHA384:
68 return 64;
69 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
70 case WPA_KEY_MGMT_FILS_SHA256:
71 case WPA_KEY_MGMT_FT_FILS_SHA256:
72 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
73 return 32;
74 case WPA_KEY_MGMT_DPP:
75 return pmk_len <= 32 ? 16 : 32;
76 case WPA_KEY_MGMT_OWE:
77 return pmk_len <= 32 ? 16 : 32;
78 default:
79 return 16;
80 }
81 }
82
83
84 #ifdef CONFIG_IEEE80211R
wpa_kek2_len(int akmp)85 static unsigned int wpa_kek2_len(int akmp)
86 {
87 switch (akmp) {
88 case WPA_KEY_MGMT_FT_FILS_SHA256:
89 return 16;
90 case WPA_KEY_MGMT_FT_FILS_SHA384:
91 return 32;
92 default:
93 return 0;
94 }
95 }
96 #endif /* CONFIG_IEEE80211R */
97
98
wpa_mic_len(int akmp,size_t pmk_len)99 unsigned int wpa_mic_len(int akmp, size_t pmk_len)
100 {
101 switch (akmp) {
102 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
103 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
104 return 24;
105 case WPA_KEY_MGMT_FILS_SHA256:
106 case WPA_KEY_MGMT_FILS_SHA384:
107 case WPA_KEY_MGMT_FT_FILS_SHA256:
108 case WPA_KEY_MGMT_FT_FILS_SHA384:
109 return 0;
110 case WPA_KEY_MGMT_DPP:
111 return pmk_len / 2;
112 case WPA_KEY_MGMT_OWE:
113 return pmk_len / 2;
114 default:
115 return 16;
116 }
117 }
118
119
120 /**
121 * wpa_use_akm_defined - Is AKM-defined Key Descriptor Version used
122 * @akmp: WPA_KEY_MGMT_* used in key derivation
123 * Returns: 1 if AKM-defined Key Descriptor Version is used; 0 otherwise
124 */
wpa_use_akm_defined(int akmp)125 int wpa_use_akm_defined(int akmp)
126 {
127 return akmp == WPA_KEY_MGMT_OSEN ||
128 akmp == WPA_KEY_MGMT_OWE ||
129 akmp == WPA_KEY_MGMT_DPP ||
130 akmp == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 ||
131 wpa_key_mgmt_sae(akmp) ||
132 wpa_key_mgmt_suite_b(akmp) ||
133 wpa_key_mgmt_fils(akmp);
134 }
135
136
137 /**
138 * wpa_use_cmac - Is CMAC integrity algorithm used for EAPOL-Key MIC
139 * @akmp: WPA_KEY_MGMT_* used in key derivation
140 * Returns: 1 if CMAC is used; 0 otherwise
141 */
wpa_use_cmac(int akmp)142 int wpa_use_cmac(int akmp)
143 {
144 return akmp == WPA_KEY_MGMT_OSEN ||
145 akmp == WPA_KEY_MGMT_OWE ||
146 akmp == WPA_KEY_MGMT_DPP ||
147 wpa_key_mgmt_ft(akmp) ||
148 wpa_key_mgmt_sha256(akmp) ||
149 wpa_key_mgmt_sae(akmp) ||
150 wpa_key_mgmt_suite_b(akmp);
151 }
152
153
154 /**
155 * wpa_use_aes_key_wrap - Is AES Keywrap algorithm used for EAPOL-Key Key Data
156 * @akmp: WPA_KEY_MGMT_* used in key derivation
157 * Returns: 1 if AES Keywrap is used; 0 otherwise
158 *
159 * Note: AKM 00-0F-AC:1 and 00-0F-AC:2 have special rules for selecting whether
160 * to use AES Keywrap based on the negotiated pairwise cipher. This function
161 * does not cover those special cases.
162 */
wpa_use_aes_key_wrap(int akmp)163 int wpa_use_aes_key_wrap(int akmp)
164 {
165 return akmp == WPA_KEY_MGMT_OSEN ||
166 akmp == WPA_KEY_MGMT_OWE ||
167 akmp == WPA_KEY_MGMT_DPP ||
168 wpa_key_mgmt_ft(akmp) ||
169 wpa_key_mgmt_sha256(akmp) ||
170 wpa_key_mgmt_sae(akmp) ||
171 wpa_key_mgmt_suite_b(akmp);
172 }
173
174
175 /**
176 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
177 * @key: EAPOL-Key Key Confirmation Key (KCK)
178 * @key_len: KCK length in octets
179 * @akmp: WPA_KEY_MGMT_* used in key derivation
180 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
181 * @buf: Pointer to the beginning of the EAPOL header (version field)
182 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
183 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
184 * Returns: 0 on success, -1 on failure
185 *
186 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
187 * to be cleared (all zeroes) when calling this function.
188 *
189 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
190 * description of the Key MIC calculation. It includes packet data from the
191 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
192 * happened during final editing of the standard and the correct behavior is
193 * defined in the last draft (IEEE 802.11i/D10).
194 */
wpa_eapol_key_mic(const u8 * key,size_t key_len,int akmp,int ver,const u8 * buf,size_t len,u8 * mic)195 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
196 const u8 *buf, size_t len, u8 *mic)
197 {
198 u8 hash[SHA512_MAC_LEN];
199
200 if (key_len == 0) {
201 wpa_printf(MSG_DEBUG,
202 "WPA: KCK not set - cannot calculate MIC");
203 return -1;
204 }
205
206 switch (ver) {
207 #ifndef CONFIG_FIPS
208 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
209 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-MD5");
210 return hmac_md5(key, key_len, buf, len, mic);
211 #endif /* CONFIG_FIPS */
212 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
213 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA1");
214 if (hmac_sha1(key, key_len, buf, len, hash))
215 return -1;
216 os_memcpy(mic, hash, MD5_MAC_LEN);
217 break;
218 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
219 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC");
220 return omac1_aes_128(key, buf, len, mic);
221 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
222 switch (akmp) {
223 #ifdef CONFIG_SAE
224 case WPA_KEY_MGMT_SAE:
225 case WPA_KEY_MGMT_FT_SAE:
226 wpa_printf(MSG_DEBUG,
227 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - SAE)");
228 return omac1_aes_128(key, buf, len, mic);
229 #endif /* CONFIG_SAE */
230 #ifdef CONFIG_HS20
231 case WPA_KEY_MGMT_OSEN:
232 wpa_printf(MSG_DEBUG,
233 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - OSEN)");
234 return omac1_aes_128(key, buf, len, mic);
235 #endif /* CONFIG_HS20 */
236 #ifdef CONFIG_SUITEB
237 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
238 wpa_printf(MSG_DEBUG,
239 "WPA: EAPOL-Key MIC using HMAC-SHA256 (AKM-defined - Suite B)");
240 if (hmac_sha256(key, key_len, buf, len, hash))
241 return -1;
242 os_memcpy(mic, hash, MD5_MAC_LEN);
243 break;
244 #endif /* CONFIG_SUITEB */
245 #ifdef CONFIG_SUITEB192
246 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
247 wpa_printf(MSG_DEBUG,
248 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - Suite B 192-bit)");
249 if (hmac_sha384(key, key_len, buf, len, hash))
250 return -1;
251 os_memcpy(mic, hash, 24);
252 break;
253 #endif /* CONFIG_SUITEB192 */
254 #ifdef CONFIG_OWE
255 case WPA_KEY_MGMT_OWE:
256 wpa_printf(MSG_DEBUG,
257 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - OWE)",
258 (unsigned int) key_len * 8 * 2);
259 if (key_len == 128 / 8) {
260 if (hmac_sha256(key, key_len, buf, len, hash))
261 return -1;
262 } else if (key_len == 192 / 8) {
263 if (hmac_sha384(key, key_len, buf, len, hash))
264 return -1;
265 } else if (key_len == 256 / 8) {
266 if (hmac_sha512(key, key_len, buf, len, hash))
267 return -1;
268 } else {
269 wpa_printf(MSG_INFO,
270 "OWE: Unsupported KCK length: %u",
271 (unsigned int) key_len);
272 return -1;
273 }
274 os_memcpy(mic, hash, key_len);
275 break;
276 #endif /* CONFIG_OWE */
277 #ifdef CONFIG_DPP
278 case WPA_KEY_MGMT_DPP:
279 wpa_printf(MSG_DEBUG,
280 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - DPP)",
281 (unsigned int) key_len * 8 * 2);
282 if (key_len == 128 / 8) {
283 if (hmac_sha256(key, key_len, buf, len, hash))
284 return -1;
285 } else if (key_len == 192 / 8) {
286 if (hmac_sha384(key, key_len, buf, len, hash))
287 return -1;
288 } else if (key_len == 256 / 8) {
289 if (hmac_sha512(key, key_len, buf, len, hash))
290 return -1;
291 } else {
292 wpa_printf(MSG_INFO,
293 "DPP: Unsupported KCK length: %u",
294 (unsigned int) key_len);
295 return -1;
296 }
297 os_memcpy(mic, hash, key_len);
298 break;
299 #endif /* CONFIG_DPP */
300 #if defined(CONFIG_IEEE80211R) && defined(CONFIG_SHA384)
301 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
302 wpa_printf(MSG_DEBUG,
303 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - FT 802.1X SHA384)");
304 if (hmac_sha384(key, key_len, buf, len, hash))
305 return -1;
306 os_memcpy(mic, hash, 24);
307 break;
308 #endif /* CONFIG_IEEE80211R && CONFIG_SHA384 */
309 default:
310 wpa_printf(MSG_DEBUG,
311 "WPA: EAPOL-Key MIC algorithm not known (AKM-defined - akmp=0x%x)",
312 akmp);
313 return -1;
314 }
315 break;
316 default:
317 wpa_printf(MSG_DEBUG,
318 "WPA: EAPOL-Key MIC algorithm not known (ver=%d)",
319 ver);
320 return -1;
321 }
322
323 return 0;
324 }
325
326
327 /**
328 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
329 * @pmk: Pairwise master key
330 * @pmk_len: Length of PMK
331 * @label: Label to use in derivation
332 * @addr1: AA or SA
333 * @addr2: SA or AA
334 * @nonce1: ANonce or SNonce
335 * @nonce2: SNonce or ANonce
336 * @ptk: Buffer for pairwise transient key
337 * @akmp: Negotiated AKM
338 * @cipher: Negotiated pairwise cipher
339 * @kdk_len: The length in octets that should be derived for KDK
340 * Returns: 0 on success, -1 on failure
341 *
342 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
343 * PTK = PRF-X(PMK, "Pairwise key expansion",
344 * Min(AA, SA) || Max(AA, SA) ||
345 * Min(ANonce, SNonce) || Max(ANonce, SNonce)
346 * [ || Z.x ])
347 *
348 * The optional Z.x component is used only with DPP and that part is not defined
349 * in IEEE 802.11.
350 */
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)351 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
352 const u8 *addr1, const u8 *addr2,
353 const u8 *nonce1, const u8 *nonce2,
354 struct wpa_ptk *ptk, int akmp, int cipher,
355 const u8 *z, size_t z_len, size_t kdk_len)
356 {
357 #define MAX_Z_LEN 66 /* with NIST P-521 */
358 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN];
359 size_t data_len = 2 * ETH_ALEN + 2 * WPA_NONCE_LEN;
360 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
361 WPA_KDK_MAX_LEN];
362 size_t ptk_len;
363 #ifdef CONFIG_OWE
364 int owe_ptk_workaround = 0;
365
366 if (akmp == (WPA_KEY_MGMT_OWE | WPA_KEY_MGMT_PSK_SHA256)) {
367 owe_ptk_workaround = 1;
368 akmp = WPA_KEY_MGMT_OWE;
369 }
370 #endif /* CONFIG_OWE */
371
372 if (pmk_len == 0) {
373 wpa_printf(MSG_ERROR, "WPA: No PMK set for PTK derivation");
374 return -1;
375 }
376
377 if (z_len > MAX_Z_LEN)
378 return -1;
379
380 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
381 os_memcpy(data, addr1, ETH_ALEN);
382 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
383 } else {
384 os_memcpy(data, addr2, ETH_ALEN);
385 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
386 }
387
388 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
389 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
390 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
391 WPA_NONCE_LEN);
392 } else {
393 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
394 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
395 WPA_NONCE_LEN);
396 }
397
398 if (z && z_len) {
399 os_memcpy(data + 2 * ETH_ALEN + 2 * WPA_NONCE_LEN, z, z_len);
400 data_len += z_len;
401 }
402
403 if (kdk_len > WPA_KDK_MAX_LEN) {
404 wpa_printf(MSG_ERROR,
405 "WPA: KDK len=%zu exceeds max supported len",
406 kdk_len);
407 return -1;
408 }
409
410 ptk->kck_len = wpa_kck_len(akmp, pmk_len);
411 ptk->kek_len = wpa_kek_len(akmp, pmk_len);
412 ptk->tk_len = wpa_cipher_key_len(cipher);
413 ptk->kdk_len = kdk_len;
414 if (ptk->tk_len == 0) {
415 wpa_printf(MSG_ERROR,
416 "WPA: Unsupported cipher (0x%x) used in PTK derivation",
417 cipher);
418 return -1;
419 }
420 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + ptk->kdk_len;
421
422 if (wpa_key_mgmt_sha384(akmp)) {
423 #if defined(CONFIG_SUITEB192) || defined(CONFIG_FILS)
424 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
425 if (sha384_prf(pmk, pmk_len, label, data, data_len,
426 tmp, ptk_len) < 0)
427 return -1;
428 #else /* CONFIG_SUITEB192 || CONFIG_FILS */
429 return -1;
430 #endif /* CONFIG_SUITEB192 || CONFIG_FILS */
431 } else if (wpa_key_mgmt_sha256(akmp)) {
432 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
433 if (sha256_prf(pmk, pmk_len, label, data, data_len,
434 tmp, ptk_len) < 0)
435 return -1;
436 #ifdef CONFIG_OWE
437 } else if (akmp == WPA_KEY_MGMT_OWE && (pmk_len == 32 ||
438 owe_ptk_workaround)) {
439 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
440 if (sha256_prf(pmk, pmk_len, label, data, data_len,
441 tmp, ptk_len) < 0)
442 return -1;
443 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 48) {
444 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
445 if (sha384_prf(pmk, pmk_len, label, data, data_len,
446 tmp, ptk_len) < 0)
447 return -1;
448 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 64) {
449 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)");
450 if (sha512_prf(pmk, pmk_len, label, data, data_len,
451 tmp, ptk_len) < 0)
452 return -1;
453 } else if (akmp == WPA_KEY_MGMT_OWE) {
454 wpa_printf(MSG_INFO, "OWE: Unknown PMK length %u",
455 (unsigned int) pmk_len);
456 return -1;
457 #endif /* CONFIG_OWE */
458 #ifdef CONFIG_DPP
459 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 32) {
460 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)");
461 if (sha256_prf(pmk, pmk_len, label, data, data_len,
462 tmp, ptk_len) < 0)
463 return -1;
464 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 48) {
465 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)");
466 if (sha384_prf(pmk, pmk_len, label, data, data_len,
467 tmp, ptk_len) < 0)
468 return -1;
469 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 64) {
470 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)");
471 if (sha512_prf(pmk, pmk_len, label, data, data_len,
472 tmp, ptk_len) < 0)
473 return -1;
474 } else if (akmp == WPA_KEY_MGMT_DPP) {
475 wpa_printf(MSG_INFO, "DPP: Unknown PMK length %u",
476 (unsigned int) pmk_len);
477 return -1;
478 #endif /* CONFIG_DPP */
479 } else {
480 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA1)");
481 if (sha1_prf(pmk, pmk_len, label, data, data_len, tmp,
482 ptk_len) < 0)
483 return -1;
484 }
485
486 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR_SEC " A2=" MACSTR_SEC,
487 MAC2STR_SEC(addr1), MAC2STR_SEC(addr2));
488 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
489 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
490 if (z && z_len)
491 wpa_hexdump_key(MSG_DEBUG, "WPA: Z.x", z, z_len);
492 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
493 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len);
494
495 os_memcpy(ptk->kck, tmp, ptk->kck_len);
496 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len);
497
498 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
499 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
500
501 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
502 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
503
504 if (kdk_len) {
505 os_memcpy(ptk->kdk, tmp + ptk->kck_len + ptk->kek_len +
506 ptk->tk_len, ptk->kdk_len);
507 wpa_hexdump_key(MSG_DEBUG, "WPA: KDK", ptk->kdk, ptk->kdk_len);
508 }
509
510 ptk->kek2_len = 0;
511 ptk->kck2_len = 0;
512
513 os_memset(tmp, 0, sizeof(tmp));
514 os_memset(data, 0, data_len);
515 return 0;
516 }
517
518 #ifdef CONFIG_FILS
519
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)520 int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len,
521 const u8 *snonce, const u8 *anonce, const u8 *dh_ss,
522 size_t dh_ss_len, u8 *pmk, size_t *pmk_len)
523 {
524 u8 nonces[2 * FILS_NONCE_LEN];
525 const u8 *addr[2];
526 size_t len[2];
527 size_t num_elem;
528 int res;
529
530 /* PMK = HMAC-Hash(SNonce || ANonce, rMSK [ || DHss ]) */
531 wpa_printf(MSG_DEBUG, "FILS: rMSK to PMK derivation");
532
533 if (wpa_key_mgmt_sha384(akmp))
534 *pmk_len = SHA384_MAC_LEN;
535 else if (wpa_key_mgmt_sha256(akmp))
536 *pmk_len = SHA256_MAC_LEN;
537 else
538 return -1;
539
540 wpa_hexdump_key(MSG_DEBUG, "FILS: rMSK", rmsk, rmsk_len);
541 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
542 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
543 wpa_hexdump(MSG_DEBUG, "FILS: DHss", dh_ss, dh_ss_len);
544
545 os_memcpy(nonces, snonce, FILS_NONCE_LEN);
546 os_memcpy(&nonces[FILS_NONCE_LEN], anonce, FILS_NONCE_LEN);
547 addr[0] = rmsk;
548 len[0] = rmsk_len;
549 num_elem = 1;
550 if (dh_ss) {
551 addr[1] = dh_ss;
552 len[1] = dh_ss_len;
553 num_elem++;
554 }
555 if (wpa_key_mgmt_sha384(akmp))
556 res = hmac_sha384_vector(nonces, 2 * FILS_NONCE_LEN, num_elem,
557 addr, len, pmk);
558 else
559 res = hmac_sha256_vector(nonces, 2 * FILS_NONCE_LEN, num_elem,
560 addr, len, pmk);
561 if (res == 0)
562 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, *pmk_len);
563 else
564 *pmk_len = 0;
565 return res;
566 }
567
568
fils_pmkid_erp(int akmp,const u8 * reauth,size_t reauth_len,u8 * pmkid)569 int fils_pmkid_erp(int akmp, const u8 *reauth, size_t reauth_len,
570 u8 *pmkid)
571 {
572 const u8 *addr[1];
573 size_t len[1];
574 u8 hash[SHA384_MAC_LEN];
575 int res;
576
577 /* PMKID = Truncate-128(Hash(EAP-Initiate/Reauth)) */
578 addr[0] = reauth;
579 len[0] = reauth_len;
580 if (wpa_key_mgmt_sha384(akmp))
581 res = sha384_vector(1, addr, len, hash);
582 else if (wpa_key_mgmt_sha256(akmp))
583 res = sha256_vector(1, addr, len, hash);
584 else
585 return -1;
586 if (res)
587 return res;
588 os_memcpy(pmkid, hash, PMKID_LEN);
589 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
590 return 0;
591 }
592
593
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)594 int fils_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const u8 *spa, const u8 *aa,
595 const u8 *snonce, const u8 *anonce, const u8 *dhss,
596 size_t dhss_len, struct wpa_ptk *ptk,
597 u8 *ick, size_t *ick_len, int akmp, int cipher,
598 u8 *fils_ft, size_t *fils_ft_len, size_t kdk_len)
599 {
600 u8 *data, *pos;
601 size_t data_len;
602 u8 tmp[FILS_ICK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
603 FILS_FT_MAX_LEN + WPA_KDK_MAX_LEN];
604 size_t key_data_len;
605 const char *label = "FILS PTK Derivation";
606 int ret = -1;
607 size_t offset;
608
609 /*
610 * FILS-Key-Data = PRF-X(PMK, "FILS PTK Derivation",
611 * SPA || AA || SNonce || ANonce [ || DHss ])
612 * ICK = L(FILS-Key-Data, 0, ICK_bits)
613 * KEK = L(FILS-Key-Data, ICK_bits, KEK_bits)
614 * TK = L(FILS-Key-Data, ICK_bits + KEK_bits, TK_bits)
615 * If doing FT initial mobility domain association:
616 * FILS-FT = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits,
617 * FILS-FT_bits)
618 * When a KDK is derived:
619 * KDK = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits + FILS-FT_bits,
620 * KDK_bits)
621 */
622 data_len = 2 * ETH_ALEN + 2 * FILS_NONCE_LEN + dhss_len;
623 data = os_malloc(data_len);
624 if (!data)
625 goto err;
626 pos = data;
627 os_memcpy(pos, spa, ETH_ALEN);
628 pos += ETH_ALEN;
629 os_memcpy(pos, aa, ETH_ALEN);
630 pos += ETH_ALEN;
631 os_memcpy(pos, snonce, FILS_NONCE_LEN);
632 pos += FILS_NONCE_LEN;
633 os_memcpy(pos, anonce, FILS_NONCE_LEN);
634 pos += FILS_NONCE_LEN;
635 if (dhss)
636 os_memcpy(pos, dhss, dhss_len);
637
638 ptk->kck_len = 0;
639 ptk->kek_len = wpa_kek_len(akmp, pmk_len);
640 ptk->tk_len = wpa_cipher_key_len(cipher);
641 if (wpa_key_mgmt_sha384(akmp))
642 *ick_len = 48;
643 else if (wpa_key_mgmt_sha256(akmp))
644 *ick_len = 32;
645 else
646 goto err;
647 key_data_len = *ick_len + ptk->kek_len + ptk->tk_len;
648
649 if (kdk_len) {
650 if (kdk_len > WPA_KDK_MAX_LEN) {
651 wpa_printf(MSG_ERROR, "FILS: KDK len=%zu too big",
652 kdk_len);
653 goto err;
654 }
655
656 ptk->kdk_len = kdk_len;
657 key_data_len += kdk_len;
658 } else {
659 ptk->kdk_len = 0;
660 }
661
662 if (fils_ft && fils_ft_len) {
663 if (akmp == WPA_KEY_MGMT_FT_FILS_SHA256) {
664 *fils_ft_len = 32;
665 } else if (akmp == WPA_KEY_MGMT_FT_FILS_SHA384) {
666 *fils_ft_len = 48;
667 } else {
668 *fils_ft_len = 0;
669 fils_ft = NULL;
670 }
671 key_data_len += *fils_ft_len;
672 }
673
674 if (wpa_key_mgmt_sha384(akmp)) {
675 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA384)");
676 if (sha384_prf(pmk, pmk_len, label, data, data_len,
677 tmp, key_data_len) < 0)
678 goto err;
679 } else {
680 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA256)");
681 if (sha256_prf(pmk, pmk_len, label, data, data_len,
682 tmp, key_data_len) < 0)
683 goto err;
684 }
685
686 wpa_printf(MSG_DEBUG, "FILS: PTK derivation - SPA=" MACSTR_SEC
687 " AA=" MACSTR_SEC, MAC2STR_SEC(spa), MAC2STR_SEC(aa));
688 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
689 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
690 if (dhss)
691 wpa_hexdump_key(MSG_DEBUG, "FILS: DHss", dhss, dhss_len);
692 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, pmk_len);
693 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-Key-Data", tmp, key_data_len);
694
695 os_memcpy(ick, tmp, *ick_len);
696 offset = *ick_len;
697 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, *ick_len);
698
699 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len);
700 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK", ptk->kek, ptk->kek_len);
701 offset += ptk->kek_len;
702
703 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len);
704 wpa_hexdump_key(MSG_DEBUG, "FILS: TK", ptk->tk, ptk->tk_len);
705 offset += ptk->tk_len;
706
707 if (fils_ft && fils_ft_len) {
708 os_memcpy(fils_ft, tmp + offset, *fils_ft_len);
709 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-FT",
710 fils_ft, *fils_ft_len);
711 offset += *fils_ft_len;
712 }
713
714 if (ptk->kdk_len) {
715 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len);
716 wpa_hexdump_key(MSG_DEBUG, "FILS: KDK", ptk->kdk, ptk->kdk_len);
717 }
718
719 ptk->kek2_len = 0;
720 ptk->kck2_len = 0;
721
722 os_memset(tmp, 0, sizeof(tmp));
723 ret = 0;
724 err:
725 bin_clear_free(data, data_len);
726 return ret;
727 }
728
729
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)730 int fils_key_auth_sk(const u8 *ick, size_t ick_len, const u8 *snonce,
731 const u8 *anonce, const u8 *sta_addr, const u8 *bssid,
732 const u8 *g_sta, size_t g_sta_len,
733 const u8 *g_ap, size_t g_ap_len,
734 int akmp, u8 *key_auth_sta, u8 *key_auth_ap,
735 size_t *key_auth_len)
736 {
737 const u8 *addr[6];
738 size_t len[6];
739 size_t num_elem = 4;
740 int res;
741
742 wpa_printf(MSG_DEBUG, "FILS: Key-Auth derivation: STA-MAC=" MACSTR_SEC
743 " AP-BSSID=" MACSTR_SEC, MAC2STR_SEC(sta_addr), MAC2STR_SEC(bssid));
744 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, ick_len);
745 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN);
746 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN);
747 wpa_hexdump(MSG_DEBUG, "FILS: gSTA", g_sta, g_sta_len);
748 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len);
749
750 /*
751 * For (Re)Association Request frame (STA->AP):
752 * Key-Auth = HMAC-Hash(ICK, SNonce || ANonce || STA-MAC || AP-BSSID
753 * [ || gSTA || gAP ])
754 */
755 addr[0] = snonce;
756 len[0] = FILS_NONCE_LEN;
757 addr[1] = anonce;
758 len[1] = FILS_NONCE_LEN;
759 addr[2] = sta_addr;
760 len[2] = ETH_ALEN;
761 addr[3] = bssid;
762 len[3] = ETH_ALEN;
763 if (g_sta && g_sta_len && g_ap && g_ap_len) {
764 addr[4] = g_sta;
765 len[4] = g_sta_len;
766 addr[5] = g_ap;
767 len[5] = g_ap_len;
768 num_elem = 6;
769 }
770
771 if (wpa_key_mgmt_sha384(akmp)) {
772 *key_auth_len = 48;
773 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len,
774 key_auth_sta);
775 } else if (wpa_key_mgmt_sha256(akmp)) {
776 *key_auth_len = 32;
777 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len,
778 key_auth_sta);
779 } else {
780 return -1;
781 }
782 if (res < 0)
783 return res;
784
785 /*
786 * For (Re)Association Response frame (AP->STA):
787 * Key-Auth = HMAC-Hash(ICK, ANonce || SNonce || AP-BSSID || STA-MAC
788 * [ || gAP || gSTA ])
789 */
790 addr[0] = anonce;
791 addr[1] = snonce;
792 addr[2] = bssid;
793 addr[3] = sta_addr;
794 if (g_sta && g_sta_len && g_ap && g_ap_len) {
795 addr[4] = g_ap;
796 len[4] = g_ap_len;
797 addr[5] = g_sta;
798 len[5] = g_sta_len;
799 }
800
801 if (wpa_key_mgmt_sha384(akmp))
802 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len,
803 key_auth_ap);
804 else if (wpa_key_mgmt_sha256(akmp))
805 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len,
806 key_auth_ap);
807 if (res < 0)
808 return res;
809
810 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (STA)",
811 key_auth_sta, *key_auth_len);
812 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (AP)",
813 key_auth_ap, *key_auth_len);
814
815 return 0;
816 }
817
818 #endif /* CONFIG_FILS */
819
820
821 #ifdef CONFIG_IEEE80211R
wpa_ft_mic(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,u8 * mic)822 int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr,
823 const u8 *ap_addr, u8 transaction_seqnum,
824 const u8 *mdie, size_t mdie_len,
825 const u8 *ftie, size_t ftie_len,
826 const u8 *rsnie, size_t rsnie_len,
827 const u8 *ric, size_t ric_len,
828 const u8 *rsnxe, size_t rsnxe_len,
829 u8 *mic)
830 {
831 const u8 *addr[10];
832 size_t len[10];
833 size_t i, num_elem = 0;
834 u8 zero_mic[24];
835 size_t mic_len, fte_fixed_len;
836
837 if (kck_len == 16) {
838 mic_len = 16;
839 #ifdef CONFIG_SHA384
840 } else if (kck_len == 24) {
841 mic_len = 24;
842 #endif /* CONFIG_SHA384 */
843 } else {
844 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u",
845 (unsigned int) kck_len);
846 return -1;
847 }
848
849 fte_fixed_len = sizeof(struct rsn_ftie) - 16 + mic_len;
850
851 addr[num_elem] = sta_addr;
852 len[num_elem] = ETH_ALEN;
853 num_elem++;
854
855 addr[num_elem] = ap_addr;
856 len[num_elem] = ETH_ALEN;
857 num_elem++;
858
859 addr[num_elem] = &transaction_seqnum;
860 len[num_elem] = 1;
861 num_elem++;
862
863 if (rsnie) {
864 addr[num_elem] = rsnie;
865 len[num_elem] = rsnie_len;
866 num_elem++;
867 }
868 if (mdie) {
869 addr[num_elem] = mdie;
870 len[num_elem] = mdie_len;
871 num_elem++;
872 }
873 if (ftie) {
874 if (ftie_len < 2 + fte_fixed_len)
875 return -1;
876
877 /* IE hdr and mic_control */
878 addr[num_elem] = ftie;
879 len[num_elem] = 2 + 2;
880 num_elem++;
881
882 /* MIC field with all zeros */
883 os_memset(zero_mic, 0, mic_len);
884 addr[num_elem] = zero_mic;
885 len[num_elem] = mic_len;
886 num_elem++;
887
888 /* Rest of FTIE */
889 addr[num_elem] = ftie + 2 + 2 + mic_len;
890 len[num_elem] = ftie_len - (2 + 2 + mic_len);
891 num_elem++;
892 }
893 if (ric) {
894 addr[num_elem] = ric;
895 len[num_elem] = ric_len;
896 num_elem++;
897 }
898
899 if (rsnxe) {
900 addr[num_elem] = rsnxe;
901 len[num_elem] = rsnxe_len;
902 num_elem++;
903 }
904
905 for (i = 0; i < num_elem; i++)
906 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]);
907 #ifdef CONFIG_SHA384
908 if (kck_len == 24) {
909 u8 hash[SHA384_MAC_LEN];
910
911 if (hmac_sha384_vector(kck, kck_len, num_elem, addr, len, hash))
912 return -1;
913 os_memcpy(mic, hash, 24);
914 }
915 #endif /* CONFIG_SHA384 */
916 if (kck_len == 16 &&
917 omac1_aes_128_vector(kck, num_elem, addr, len, mic))
918 return -1;
919
920 return 0;
921 }
922
923
wpa_ft_parse_ftie(const u8 * ie,size_t ie_len,struct wpa_ft_ies * parse,int use_sha384)924 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
925 struct wpa_ft_ies *parse, int use_sha384)
926 {
927 const u8 *end, *pos;
928
929 parse->ftie = ie;
930 parse->ftie_len = ie_len;
931
932 pos = ie + (use_sha384 ? sizeof(struct rsn_ftie_sha384) :
933 sizeof(struct rsn_ftie));
934 end = ie + ie_len;
935 wpa_hexdump(MSG_DEBUG, "FT: Parse FTE subelements", pos, end - pos);
936
937 while (end - pos >= 2) {
938 u8 id, len;
939
940 id = *pos++;
941 len = *pos++;
942 if (len > end - pos) {
943 wpa_printf(MSG_DEBUG, "FT: Truncated subelement");
944 break;
945 }
946
947 switch (id) {
948 case FTIE_SUBELEM_R1KH_ID:
949 if (len != FT_R1KH_ID_LEN) {
950 wpa_printf(MSG_DEBUG,
951 "FT: Invalid R1KH-ID length in FTIE: %d",
952 len);
953 return -1;
954 }
955 parse->r1kh_id = pos;
956 break;
957 case FTIE_SUBELEM_GTK:
958 parse->gtk = pos;
959 parse->gtk_len = len;
960 break;
961 case FTIE_SUBELEM_R0KH_ID:
962 if (len < 1 || len > FT_R0KH_ID_MAX_LEN) {
963 wpa_printf(MSG_DEBUG,
964 "FT: Invalid R0KH-ID length in FTIE: %d",
965 len);
966 return -1;
967 }
968 parse->r0kh_id = pos;
969 parse->r0kh_id_len = len;
970 break;
971 case FTIE_SUBELEM_IGTK:
972 parse->igtk = pos;
973 parse->igtk_len = len;
974 break;
975 #ifdef CONFIG_OCV
976 case FTIE_SUBELEM_OCI:
977 parse->oci = pos;
978 parse->oci_len = len;
979 break;
980 #endif /* CONFIG_OCV */
981 case FTIE_SUBELEM_BIGTK:
982 parse->bigtk = pos;
983 parse->bigtk_len = len;
984 break;
985 default:
986 wpa_printf(MSG_DEBUG, "FT: Unknown subelem id %u", id);
987 break;
988 }
989
990 pos += len;
991 }
992
993 return 0;
994 }
995
996
wpa_ft_parse_ies(const u8 * ies,size_t ies_len,struct wpa_ft_ies * parse,int use_sha384)997 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
998 struct wpa_ft_ies *parse, int use_sha384)
999 {
1000 const u8 *end, *pos;
1001 struct wpa_ie_data data;
1002 int ret;
1003 const struct rsn_ftie *ftie;
1004 int prot_ie_count = 0;
1005 int update_use_sha384 = 0;
1006
1007 if (use_sha384 < 0) {
1008 use_sha384 = 0;
1009 update_use_sha384 = 1;
1010 }
1011
1012 os_memset(parse, 0, sizeof(*parse));
1013 if (ies == NULL)
1014 return 0;
1015
1016 pos = ies;
1017 end = ies + ies_len;
1018 while (end - pos >= 2) {
1019 u8 id, len;
1020
1021 id = *pos++;
1022 len = *pos++;
1023 if (len > end - pos)
1024 break;
1025
1026 switch (id) {
1027 case WLAN_EID_RSN:
1028 wpa_hexdump(MSG_DEBUG, "FT: RSNE", pos, len);
1029 parse->rsn = pos;
1030 parse->rsn_len = len;
1031 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
1032 parse->rsn_len + 2,
1033 &data);
1034 if (ret < 0) {
1035 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
1036 "RSN IE: %d", ret);
1037 return -1;
1038 }
1039 parse->rsn_capab = data.capabilities;
1040 if (data.num_pmkid == 1 && data.pmkid)
1041 parse->rsn_pmkid = data.pmkid;
1042 parse->key_mgmt = data.key_mgmt;
1043 parse->pairwise_cipher = data.pairwise_cipher;
1044 if (update_use_sha384) {
1045 use_sha384 =
1046 wpa_key_mgmt_sha384(parse->key_mgmt);
1047 update_use_sha384 = 0;
1048 }
1049 break;
1050 case WLAN_EID_RSNX:
1051 wpa_hexdump(MSG_DEBUG, "FT: RSNXE", pos, len);
1052 if (len < 1)
1053 break;
1054 parse->rsnxe = pos;
1055 parse->rsnxe_len = len;
1056 break;
1057 case WLAN_EID_MOBILITY_DOMAIN:
1058 wpa_hexdump(MSG_DEBUG, "FT: MDE", pos, len);
1059 if (len < sizeof(struct rsn_mdie))
1060 return -1;
1061 parse->mdie = pos;
1062 parse->mdie_len = len;
1063 break;
1064 case WLAN_EID_FAST_BSS_TRANSITION:
1065 wpa_hexdump(MSG_DEBUG, "FT: FTE", pos, len);
1066 if (use_sha384) {
1067 const struct rsn_ftie_sha384 *ftie_sha384;
1068
1069 if (len < sizeof(*ftie_sha384))
1070 return -1;
1071 ftie_sha384 =
1072 (const struct rsn_ftie_sha384 *) pos;
1073 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control",
1074 ftie_sha384->mic_control, 2);
1075 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC",
1076 ftie_sha384->mic,
1077 sizeof(ftie_sha384->mic));
1078 parse->fte_anonce = ftie_sha384->anonce;
1079 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce",
1080 ftie_sha384->anonce,
1081 WPA_NONCE_LEN);
1082 parse->fte_snonce = ftie_sha384->snonce;
1083 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce",
1084 ftie_sha384->snonce,
1085 WPA_NONCE_LEN);
1086 prot_ie_count = ftie_sha384->mic_control[1];
1087 if (wpa_ft_parse_ftie(pos, len, parse, 1) < 0)
1088 return -1;
1089 break;
1090 }
1091
1092 if (len < sizeof(*ftie))
1093 return -1;
1094 ftie = (const struct rsn_ftie *) pos;
1095 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control",
1096 ftie->mic_control, 2);
1097 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC",
1098 ftie->mic, sizeof(ftie->mic));
1099 parse->fte_anonce = ftie->anonce;
1100 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce",
1101 ftie->anonce, WPA_NONCE_LEN);
1102 parse->fte_snonce = ftie->snonce;
1103 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce",
1104 ftie->snonce, WPA_NONCE_LEN);
1105 prot_ie_count = ftie->mic_control[1];
1106 if (wpa_ft_parse_ftie(pos, len, parse, 0) < 0)
1107 return -1;
1108 break;
1109 case WLAN_EID_TIMEOUT_INTERVAL:
1110 wpa_hexdump(MSG_DEBUG, "FT: Timeout Interval",
1111 pos, len);
1112 if (len != 5)
1113 break;
1114 parse->tie = pos;
1115 parse->tie_len = len;
1116 break;
1117 case WLAN_EID_RIC_DATA:
1118 if (parse->ric == NULL)
1119 parse->ric = pos - 2;
1120 break;
1121 }
1122
1123 pos += len;
1124 }
1125
1126 if (prot_ie_count == 0)
1127 return 0; /* no MIC */
1128
1129 /*
1130 * Check that the protected IE count matches with IEs included in the
1131 * frame.
1132 */
1133 if (parse->rsn)
1134 prot_ie_count--;
1135 if (parse->mdie)
1136 prot_ie_count--;
1137 if (parse->ftie)
1138 prot_ie_count--;
1139 if (parse->rsnxe)
1140 prot_ie_count--;
1141 if (prot_ie_count < 0) {
1142 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
1143 "the protected IE count");
1144 return -1;
1145 }
1146
1147 if (prot_ie_count == 0 && parse->ric) {
1148 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
1149 "included in protected IE count");
1150 return -1;
1151 }
1152
1153 /* Determine the end of the RIC IE(s) */
1154 if (parse->ric) {
1155 pos = parse->ric;
1156 while (end - pos >= 2 && 2 + pos[1] <= end - pos &&
1157 prot_ie_count) {
1158 prot_ie_count--;
1159 pos += 2 + pos[1];
1160 }
1161 parse->ric_len = pos - parse->ric;
1162 }
1163 if (prot_ie_count) {
1164 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
1165 "frame", (int) prot_ie_count);
1166 return -1;
1167 }
1168
1169 return 0;
1170 }
1171 #endif /* CONFIG_IEEE80211R */
1172
1173
1174 #ifdef CONFIG_PASN
1175
1176 /*
1177 * pasn_use_sha384 - Should SHA384 be used or SHA256
1178 *
1179 * @akmp: Authentication and key management protocol
1180 * @cipher: The cipher suite
1181 *
1182 * According to IEEE P802.11az/D2.7, 12.12.7, the hash algorithm to use is the
1183 * hash algorithm defined for the Base AKM (see Table 9-151 (AKM suite
1184 * selectors)). When there is no Base AKM, the hash algorithm is selected based
1185 * on the pairwise cipher suite provided in the RSNE by the AP in the second
1186 * PASN frame. SHA-256 is used as the hash algorithm, except for the ciphers
1187 * 00-0F-AC:9 and 00-0F-AC:10 for which SHA-384 is used.
1188 */
pasn_use_sha384(int akmp,int cipher)1189 static bool pasn_use_sha384(int akmp, int cipher)
1190 {
1191 return (akmp == WPA_KEY_MGMT_PASN && (cipher == WPA_CIPHER_CCMP_256 ||
1192 cipher == WPA_CIPHER_GCMP_256)) ||
1193 wpa_key_mgmt_sha384(akmp);
1194 }
1195
1196
1197 /**
1198 * pasn_pmk_to_ptk - Calculate PASN PTK from PMK, addresses, etc.
1199 * @pmk: Pairwise master key
1200 * @pmk_len: Length of PMK
1201 * @spa: Suppplicant address
1202 * @bssid: AP BSSID
1203 * @dhss: Is the shared secret (DHss) derived from the PASN ephemeral key
1204 * exchange encoded as an octet string
1205 * @dhss_len: The length of dhss in octets
1206 * @ptk: Buffer for pairwise transient key
1207 * @akmp: Negotiated AKM
1208 * @cipher: Negotiated pairwise cipher
1209 * @kdk_len: the length in octets that should be derived for HTLK. Can be zero.
1210 * Returns: 0 on success, -1 on failure
1211 */
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)1212 int pasn_pmk_to_ptk(const u8 *pmk, size_t pmk_len,
1213 const u8 *spa, const u8 *bssid,
1214 const u8 *dhss, size_t dhss_len,
1215 struct wpa_ptk *ptk, int akmp, int cipher,
1216 size_t kdk_len)
1217 {
1218 u8 tmp[WPA_KCK_MAX_LEN + WPA_TK_MAX_LEN + WPA_KDK_MAX_LEN];
1219 u8 *data;
1220 size_t data_len, ptk_len;
1221 int ret = -1;
1222 const char *label = "PASN PTK Derivation";
1223
1224 if (!pmk || !pmk_len) {
1225 wpa_printf(MSG_ERROR, "PASN: No PMK set for PTK derivation");
1226 return -1;
1227 }
1228
1229 if (!dhss || !dhss_len) {
1230 wpa_printf(MSG_ERROR, "PASN: No DHss set for PTK derivation");
1231 return -1;
1232 }
1233
1234 /*
1235 * PASN-PTK = KDF(PMK, “PASN PTK Derivation”, SPA || BSSID || DHss)
1236 *
1237 * KCK = L(PASN-PTK, 0, 256)
1238 * TK = L(PASN-PTK, 256, TK_bits)
1239 * KDK = L(PASN-PTK, 256 + TK_bits, kdk_len * 8)
1240 */
1241 data_len = 2 * ETH_ALEN + dhss_len;
1242 data = os_zalloc(data_len);
1243 if (!data)
1244 return -1;
1245
1246 os_memcpy(data, spa, ETH_ALEN);
1247 os_memcpy(data + ETH_ALEN, bssid, ETH_ALEN);
1248 os_memcpy(data + 2 * ETH_ALEN, dhss, dhss_len);
1249
1250 ptk->kck_len = WPA_PASN_KCK_LEN;
1251 ptk->tk_len = wpa_cipher_key_len(cipher);
1252 ptk->kdk_len = kdk_len;
1253 ptk->kek_len = 0;
1254 ptk->kek2_len = 0;
1255 ptk->kck2_len = 0;
1256
1257 if (ptk->tk_len == 0) {
1258 wpa_printf(MSG_ERROR,
1259 "PASN: Unsupported cipher (0x%x) used in PTK derivation",
1260 cipher);
1261 goto err;
1262 }
1263
1264 ptk_len = ptk->kck_len + ptk->tk_len + ptk->kdk_len;
1265 if (ptk_len > sizeof(tmp))
1266 goto err;
1267
1268 if (pasn_use_sha384(akmp, cipher)) {
1269 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA384");
1270
1271 if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp,
1272 ptk_len) < 0)
1273 goto err;
1274 } else {
1275 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA256");
1276
1277 if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp,
1278 ptk_len) < 0)
1279 goto err;
1280 }
1281
1282 wpa_printf(MSG_DEBUG,
1283 "PASN: PTK derivation: SPA=" MACSTR_SEC " BSSID=" MACSTR_SEC,
1284 MAC2STR_SEC(spa), MAC2STR_SEC(bssid));
1285
1286 wpa_hexdump_key(MSG_DEBUG, "PASN: DHss", dhss, dhss_len);
1287 wpa_hexdump_key(MSG_DEBUG, "PASN: PMK", pmk, pmk_len);
1288 wpa_hexdump_key(MSG_DEBUG, "PASN: PASN-PTK", tmp, ptk_len);
1289
1290 os_memcpy(ptk->kck, tmp, WPA_PASN_KCK_LEN);
1291 wpa_hexdump_key(MSG_DEBUG, "PASN: KCK:", ptk->kck, WPA_PASN_KCK_LEN);
1292
1293 os_memcpy(ptk->tk, tmp + WPA_PASN_KCK_LEN, ptk->tk_len);
1294 wpa_hexdump_key(MSG_DEBUG, "PASN: TK:", ptk->tk, ptk->tk_len);
1295
1296 if (kdk_len) {
1297 os_memcpy(ptk->kdk, tmp + WPA_PASN_KCK_LEN + ptk->tk_len,
1298 ptk->kdk_len);
1299 wpa_hexdump_key(MSG_DEBUG, "PASN: KDK:",
1300 ptk->kdk, ptk->kdk_len);
1301 }
1302
1303 forced_memzero(tmp, sizeof(tmp));
1304 ret = 0;
1305 err:
1306 bin_clear_free(data, data_len);
1307 return ret;
1308 }
1309
1310
1311 /*
1312 * pasn_mic_len - Returns the MIC length for PASN authentication
1313 */
pasn_mic_len(int akmp,int cipher)1314 u8 pasn_mic_len(int akmp, int cipher)
1315 {
1316 if (pasn_use_sha384(akmp, cipher))
1317 return 24;
1318
1319 return 16;
1320 }
1321
1322
1323 /**
1324 * pasn_mic - Calculate PASN MIC
1325 * @kck: The key confirmation key for the PASN PTKSA
1326 * @akmp: Negotiated AKM
1327 * @cipher: Negotiated pairwise cipher
1328 * @addr1: For the 2nd PASN frame supplicant address; for the 3rd frame the
1329 * BSSID
1330 * @addr2: For the 2nd PASN frame the BSSID; for the 3rd frame the supplicant
1331 * address
1332 * @data: For calculating the MIC for the 2nd PASN frame, this should hold the
1333 * Beacon frame RSNE + RSNXE. For calculating the MIC for the 3rd PASN
1334 * frame, this should hold the hash of the body of the PASN 1st frame.
1335 * @data_len: The length of data
1336 * @frame: The body of the PASN frame including the MIC element with the octets
1337 * in the MIC field of the MIC element set to 0.
1338 * @frame_len: The length of frame
1339 * @mic: Buffer to hold the MIC on success. Should be big enough to handle the
1340 * maximal MIC length
1341 * Returns: 0 on success, -1 on failure
1342 */
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)1343 int pasn_mic(const u8 *kck, int akmp, int cipher,
1344 const u8 *addr1, const u8 *addr2,
1345 const u8 *data, size_t data_len,
1346 const u8 *frame, size_t frame_len, u8 *mic)
1347 {
1348 u8 *buf;
1349 u8 hash[SHA384_MAC_LEN];
1350 size_t buf_len = 2 * ETH_ALEN + data_len + frame_len;
1351 int ret = -1;
1352
1353 if (!kck) {
1354 wpa_printf(MSG_ERROR, "PASN: No KCK for MIC calculation");
1355 return -1;
1356 }
1357
1358 if (!data || !data_len) {
1359 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation");
1360 return -1;
1361 }
1362
1363 if (!frame || !frame_len) {
1364 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation");
1365 return -1;
1366 }
1367
1368 buf = os_zalloc(buf_len);
1369 if (!buf)
1370 return -1;
1371
1372 os_memcpy(buf, addr1, ETH_ALEN);
1373 os_memcpy(buf + ETH_ALEN, addr2, ETH_ALEN);
1374
1375 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: data", data, data_len);
1376 os_memcpy(buf + 2 * ETH_ALEN, data, data_len);
1377
1378 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: frame", frame, frame_len);
1379 os_memcpy(buf + 2 * ETH_ALEN + data_len, frame, frame_len);
1380
1381 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: KCK", kck, WPA_PASN_KCK_LEN);
1382 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: buf", buf, buf_len);
1383
1384 if (pasn_use_sha384(akmp, cipher)) {
1385 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA384");
1386
1387 if (hmac_sha384(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash))
1388 goto err;
1389
1390 os_memcpy(mic, hash, 24);
1391 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 24);
1392 } else {
1393 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA256");
1394
1395 if (hmac_sha256(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash))
1396 goto err;
1397
1398 os_memcpy(mic, hash, 16);
1399 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 16);
1400 }
1401
1402 ret = 0;
1403 err:
1404 bin_clear_free(buf, buf_len);
1405 return ret;
1406 }
1407
1408
1409 /**
1410 * pasn_auth_frame_hash - Computes a hash of an Authentication frame body
1411 * @akmp: Negotiated AKM
1412 * @cipher: Negotiated pairwise cipher
1413 * @data: Pointer to the Authentication frame body
1414 * @len: Length of the Authentication frame body
1415 * @hash: On return would hold the computed hash. Should be big enough to handle
1416 * SHA384.
1417 * Returns: 0 on success, -1 on failure
1418 */
pasn_auth_frame_hash(int akmp,int cipher,const u8 * data,size_t len,u8 * hash)1419 int pasn_auth_frame_hash(int akmp, int cipher, const u8 *data, size_t len,
1420 u8 *hash)
1421 {
1422 if (pasn_use_sha384(akmp, cipher)) {
1423 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-384");
1424 return sha384_vector(1, &data, &len, hash);
1425 } else {
1426 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-256");
1427 return sha256_vector(1, &data, &len, hash);
1428 }
1429 }
1430
1431 #endif /* CONFIG_PASN */
1432
1433
rsn_selector_to_bitfield(const u8 * s)1434 static int rsn_selector_to_bitfield(const u8 *s)
1435 {
1436 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
1437 return WPA_CIPHER_NONE;
1438 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
1439 return WPA_CIPHER_TKIP;
1440 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
1441 return WPA_CIPHER_CCMP;
1442 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
1443 return WPA_CIPHER_AES_128_CMAC;
1444 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
1445 return WPA_CIPHER_GCMP;
1446 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
1447 return WPA_CIPHER_CCMP_256;
1448 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
1449 return WPA_CIPHER_GCMP_256;
1450 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
1451 return WPA_CIPHER_BIP_GMAC_128;
1452 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
1453 return WPA_CIPHER_BIP_GMAC_256;
1454 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
1455 return WPA_CIPHER_BIP_CMAC_256;
1456 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
1457 return WPA_CIPHER_GTK_NOT_USED;
1458 return 0;
1459 }
1460
1461
rsn_key_mgmt_to_bitfield(const u8 * s)1462 static int rsn_key_mgmt_to_bitfield(const u8 *s)
1463 {
1464 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
1465 return WPA_KEY_MGMT_IEEE8021X;
1466 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
1467 return WPA_KEY_MGMT_PSK;
1468 #ifdef CONFIG_IEEE80211R
1469 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
1470 return WPA_KEY_MGMT_FT_IEEE8021X;
1471 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
1472 return WPA_KEY_MGMT_FT_PSK;
1473 #ifdef CONFIG_SHA384
1474 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384)
1475 return WPA_KEY_MGMT_FT_IEEE8021X_SHA384;
1476 #endif /* CONFIG_SHA384 */
1477 #endif /* CONFIG_IEEE80211R */
1478 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
1479 return WPA_KEY_MGMT_IEEE8021X_SHA256;
1480 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
1481 return WPA_KEY_MGMT_PSK_SHA256;
1482 #ifdef CONFIG_SAE
1483 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
1484 return WPA_KEY_MGMT_SAE;
1485 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
1486 return WPA_KEY_MGMT_FT_SAE;
1487 #endif /* CONFIG_SAE */
1488 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
1489 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
1490 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192)
1491 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
1492 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA256)
1493 return WPA_KEY_MGMT_FILS_SHA256;
1494 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA384)
1495 return WPA_KEY_MGMT_FILS_SHA384;
1496 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA256)
1497 return WPA_KEY_MGMT_FT_FILS_SHA256;
1498 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA384)
1499 return WPA_KEY_MGMT_FT_FILS_SHA384;
1500 #ifdef CONFIG_OWE
1501 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OWE)
1502 return WPA_KEY_MGMT_OWE;
1503 #endif /* CONFIG_OWE */
1504 #ifdef CONFIG_DPP
1505 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_DPP)
1506 return WPA_KEY_MGMT_DPP;
1507 #endif /* CONFIG_DPP */
1508 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN)
1509 return WPA_KEY_MGMT_OSEN;
1510 #ifdef CONFIG_PASN
1511 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PASN)
1512 return WPA_KEY_MGMT_PASN;
1513 #endif /* CONFIG_PASN */
1514 return 0;
1515 }
1516
1517
wpa_cipher_valid_group(int cipher)1518 int wpa_cipher_valid_group(int cipher)
1519 {
1520 return wpa_cipher_valid_pairwise(cipher) ||
1521 cipher == WPA_CIPHER_GTK_NOT_USED;
1522 }
1523
1524
wpa_cipher_valid_mgmt_group(int cipher)1525 int wpa_cipher_valid_mgmt_group(int cipher)
1526 {
1527 return cipher == WPA_CIPHER_GTK_NOT_USED ||
1528 cipher == WPA_CIPHER_AES_128_CMAC ||
1529 cipher == WPA_CIPHER_BIP_GMAC_128 ||
1530 cipher == WPA_CIPHER_BIP_GMAC_256 ||
1531 cipher == WPA_CIPHER_BIP_CMAC_256;
1532 }
1533
1534
1535 /**
1536 * wpa_parse_wpa_ie_rsn - Parse RSN IE
1537 * @rsn_ie: Buffer containing RSN IE
1538 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
1539 * @data: Pointer to structure that will be filled in with parsed data
1540 * Returns: 0 on success, <0 on failure
1541 */
wpa_parse_wpa_ie_rsn(const u8 * rsn_ie,size_t rsn_ie_len,struct wpa_ie_data * data)1542 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
1543 struct wpa_ie_data *data)
1544 {
1545 const u8 *pos;
1546 int left;
1547 int i, count;
1548
1549 os_memset(data, 0, sizeof(*data));
1550 data->proto = WPA_PROTO_RSN;
1551 data->pairwise_cipher = WPA_CIPHER_CCMP;
1552 data->group_cipher = WPA_CIPHER_CCMP;
1553 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1554 data->capabilities = 0;
1555 data->pmkid = NULL;
1556 data->num_pmkid = 0;
1557 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1558
1559 if (rsn_ie_len == 0) {
1560 /* No RSN IE - fail silently */
1561 return -1;
1562 }
1563
1564 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
1565 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
1566 __func__, (unsigned long) rsn_ie_len);
1567 return -1;
1568 }
1569
1570 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 &&
1571 rsn_ie[1] == rsn_ie_len - 2 &&
1572 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) {
1573 pos = rsn_ie + 6;
1574 left = rsn_ie_len - 6;
1575
1576 data->group_cipher = WPA_CIPHER_GTK_NOT_USED;
1577 data->has_group = 1;
1578 data->key_mgmt = WPA_KEY_MGMT_OSEN;
1579 data->proto = WPA_PROTO_OSEN;
1580 } else {
1581 const struct rsn_ie_hdr *hdr;
1582
1583 hdr = (const struct rsn_ie_hdr *) rsn_ie;
1584
1585 if (hdr->elem_id != WLAN_EID_RSN ||
1586 hdr->len != rsn_ie_len - 2 ||
1587 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
1588 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
1589 __func__);
1590 return -2;
1591 }
1592
1593 pos = (const u8 *) (hdr + 1);
1594 left = rsn_ie_len - sizeof(*hdr);
1595 }
1596
1597 if (left >= RSN_SELECTOR_LEN) {
1598 data->group_cipher = rsn_selector_to_bitfield(pos);
1599 data->has_group = 1;
1600 if (!wpa_cipher_valid_group(data->group_cipher)) {
1601 wpa_printf(MSG_DEBUG,
1602 "%s: invalid group cipher 0x%x (%08x)",
1603 __func__, data->group_cipher,
1604 WPA_GET_BE32(pos));
1605 return -1;
1606 }
1607 pos += RSN_SELECTOR_LEN;
1608 left -= RSN_SELECTOR_LEN;
1609 } else if (left > 0) {
1610 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
1611 __func__, left);
1612 return -3;
1613 }
1614
1615 if (left >= 2) {
1616 data->pairwise_cipher = 0;
1617 count = WPA_GET_LE16(pos);
1618 pos += 2;
1619 left -= 2;
1620 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
1621 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
1622 "count %u left %u", __func__, count, left);
1623 return -4;
1624 }
1625 if (count)
1626 data->has_pairwise = 1;
1627 for (i = 0; i < count; i++) {
1628 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
1629 pos += RSN_SELECTOR_LEN;
1630 left -= RSN_SELECTOR_LEN;
1631 }
1632 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
1633 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
1634 "pairwise cipher", __func__);
1635 return -1;
1636 }
1637 } else if (left == 1) {
1638 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
1639 __func__);
1640 return -5;
1641 }
1642
1643 if (left >= 2) {
1644 data->key_mgmt = 0;
1645 count = WPA_GET_LE16(pos);
1646 pos += 2;
1647 left -= 2;
1648 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
1649 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
1650 "count %u left %u", __func__, count, left);
1651 return -6;
1652 }
1653 for (i = 0; i < count; i++) {
1654 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
1655 pos += RSN_SELECTOR_LEN;
1656 left -= RSN_SELECTOR_LEN;
1657 }
1658 } else if (left == 1) {
1659 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
1660 __func__);
1661 return -7;
1662 }
1663
1664 if (left >= 2) {
1665 data->capabilities = WPA_GET_LE16(pos);
1666 pos += 2;
1667 left -= 2;
1668 }
1669
1670 if (left >= 2) {
1671 u16 num_pmkid = WPA_GET_LE16(pos);
1672 pos += 2;
1673 left -= 2;
1674 if (num_pmkid > (unsigned int) left / PMKID_LEN) {
1675 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
1676 "(num_pmkid=%u left=%d)",
1677 __func__, num_pmkid, left);
1678 data->num_pmkid = 0;
1679 return -9;
1680 } else {
1681 data->num_pmkid = num_pmkid;
1682 data->pmkid = pos;
1683 pos += data->num_pmkid * PMKID_LEN;
1684 left -= data->num_pmkid * PMKID_LEN;
1685 }
1686 }
1687
1688 if (left >= 4) {
1689 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
1690 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
1691 wpa_printf(MSG_DEBUG,
1692 "%s: Unsupported management group cipher 0x%x (%08x)",
1693 __func__, data->mgmt_group_cipher,
1694 WPA_GET_BE32(pos));
1695 return -10;
1696 }
1697 pos += RSN_SELECTOR_LEN;
1698 left -= RSN_SELECTOR_LEN;
1699 }
1700
1701 if (left > 0) {
1702 wpa_hexdump(MSG_DEBUG,
1703 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
1704 pos, left);
1705 }
1706
1707 return 0;
1708 }
1709
1710
wpa_selector_to_bitfield(const u8 * s)1711 static int wpa_selector_to_bitfield(const u8 *s)
1712 {
1713 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
1714 return WPA_CIPHER_NONE;
1715 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
1716 return WPA_CIPHER_TKIP;
1717 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
1718 return WPA_CIPHER_CCMP;
1719 return 0;
1720 }
1721
1722
wpa_key_mgmt_to_bitfield(const u8 * s)1723 static int wpa_key_mgmt_to_bitfield(const u8 *s)
1724 {
1725 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
1726 return WPA_KEY_MGMT_IEEE8021X;
1727 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
1728 return WPA_KEY_MGMT_PSK;
1729 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
1730 return WPA_KEY_MGMT_WPA_NONE;
1731 return 0;
1732 }
1733
1734
wpa_parse_wpa_ie_wpa(const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ie_data * data)1735 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
1736 struct wpa_ie_data *data)
1737 {
1738 const struct wpa_ie_hdr *hdr;
1739 const u8 *pos;
1740 int left;
1741 int i, count;
1742
1743 os_memset(data, 0, sizeof(*data));
1744 data->proto = WPA_PROTO_WPA;
1745 data->pairwise_cipher = WPA_CIPHER_TKIP;
1746 data->group_cipher = WPA_CIPHER_TKIP;
1747 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1748 data->capabilities = 0;
1749 data->pmkid = NULL;
1750 data->num_pmkid = 0;
1751 data->mgmt_group_cipher = 0;
1752
1753 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
1754 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
1755 __func__, (unsigned long) wpa_ie_len);
1756 return -1;
1757 }
1758
1759 hdr = (const struct wpa_ie_hdr *) wpa_ie;
1760
1761 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
1762 hdr->len != wpa_ie_len - 2 ||
1763 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
1764 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
1765 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
1766 __func__);
1767 return -2;
1768 }
1769
1770 pos = (const u8 *) (hdr + 1);
1771 left = wpa_ie_len - sizeof(*hdr);
1772
1773 if (left >= WPA_SELECTOR_LEN) {
1774 data->group_cipher = wpa_selector_to_bitfield(pos);
1775 pos += WPA_SELECTOR_LEN;
1776 left -= WPA_SELECTOR_LEN;
1777 } else if (left > 0) {
1778 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
1779 __func__, left);
1780 return -3;
1781 }
1782
1783 if (left >= 2) {
1784 data->pairwise_cipher = 0;
1785 count = WPA_GET_LE16(pos);
1786 pos += 2;
1787 left -= 2;
1788 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
1789 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
1790 "count %u left %u", __func__, count, left);
1791 return -4;
1792 }
1793 for (i = 0; i < count; i++) {
1794 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
1795 pos += WPA_SELECTOR_LEN;
1796 left -= WPA_SELECTOR_LEN;
1797 }
1798 } else if (left == 1) {
1799 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
1800 __func__);
1801 return -5;
1802 }
1803
1804 if (left >= 2) {
1805 data->key_mgmt = 0;
1806 count = WPA_GET_LE16(pos);
1807 pos += 2;
1808 left -= 2;
1809 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
1810 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
1811 "count %u left %u", __func__, count, left);
1812 return -6;
1813 }
1814 for (i = 0; i < count; i++) {
1815 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
1816 pos += WPA_SELECTOR_LEN;
1817 left -= WPA_SELECTOR_LEN;
1818 }
1819 } else if (left == 1) {
1820 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
1821 __func__);
1822 return -7;
1823 }
1824
1825 if (left >= 2) {
1826 data->capabilities = WPA_GET_LE16(pos);
1827 pos += 2;
1828 left -= 2;
1829 }
1830
1831 if (left > 0) {
1832 wpa_hexdump(MSG_DEBUG,
1833 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
1834 pos, left);
1835 }
1836
1837 return 0;
1838 }
1839
1840
wpa_default_rsn_cipher(int freq)1841 int wpa_default_rsn_cipher(int freq)
1842 {
1843 if (freq > 56160)
1844 return WPA_CIPHER_GCMP; /* DMG */
1845
1846 return WPA_CIPHER_CCMP;
1847 }
1848
1849
1850 #ifdef CONFIG_IEEE80211R
1851
1852 /**
1853 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
1854 *
1855 * IEEE Std 802.11r-2008 - 8.5.1.5.3
1856 */
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 use_sha384)1857 int wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
1858 const u8 *ssid, size_t ssid_len,
1859 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
1860 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name,
1861 int use_sha384)
1862 {
1863 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
1864 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
1865 u8 *pos, r0_key_data[64], hash[48];
1866 const u8 *addr[2];
1867 size_t len[2];
1868 size_t q = use_sha384 ? 48 : 32;
1869 size_t r0_key_data_len = q + 16;
1870
1871 /*
1872 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
1873 * SSIDlength || SSID || MDID || R0KHlength ||
1874 * R0KH-ID || S0KH-ID)
1875 * XXKey is either the second 256 bits of MSK or PSK; or the first
1876 * 384 bits of MSK for FT-EAP-SHA384.
1877 * PMK-R0 = L(R0-Key-Data, 0, Q)
1878 * PMK-R0Name-Salt = L(R0-Key-Data, Q, 128)
1879 * Q = 384 for FT-EAP-SHA384; otherwise, 256
1880 */
1881 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
1882 return -1;
1883 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R0 using KDF-%s",
1884 use_sha384 ? "SHA384" : "SHA256");
1885 wpa_hexdump_key(MSG_DEBUG, "FT: XXKey", xxkey, xxkey_len);
1886 wpa_hexdump_ascii(MSG_DEBUG, "FT: SSID", ssid, ssid_len);
1887 wpa_hexdump(MSG_DEBUG, "FT: MDID", mdid, MOBILITY_DOMAIN_ID_LEN);
1888 wpa_hexdump_ascii(MSG_DEBUG, "FT: R0KH-ID", r0kh_id, r0kh_id_len);
1889 wpa_printf(MSG_DEBUG, "FT: S0KH-ID: " MACSTR_SEC, MAC2STR_SEC(s0kh_id));
1890 pos = buf;
1891 *pos++ = ssid_len;
1892 os_memcpy(pos, ssid, ssid_len);
1893 pos += ssid_len;
1894 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
1895 pos += MOBILITY_DOMAIN_ID_LEN;
1896 *pos++ = r0kh_id_len;
1897 os_memcpy(pos, r0kh_id, r0kh_id_len);
1898 pos += r0kh_id_len;
1899 os_memcpy(pos, s0kh_id, ETH_ALEN);
1900 pos += ETH_ALEN;
1901
1902 #ifdef CONFIG_SHA384
1903 if (use_sha384) {
1904 if (xxkey_len != SHA384_MAC_LEN) {
1905 wpa_printf(MSG_ERROR,
1906 "FT: Unexpected XXKey length %d (expected %d)",
1907 (int) xxkey_len, SHA384_MAC_LEN);
1908 return -1;
1909 }
1910 if (sha384_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
1911 r0_key_data, r0_key_data_len) < 0)
1912 return -1;
1913 }
1914 #endif /* CONFIG_SHA384 */
1915 if (!use_sha384) {
1916 if (xxkey_len != PMK_LEN) {
1917 wpa_printf(MSG_ERROR,
1918 "FT: Unexpected XXKey length %d (expected %d)",
1919 (int) xxkey_len, PMK_LEN);
1920 return -1;
1921 }
1922 if (sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
1923 r0_key_data, r0_key_data_len) < 0)
1924 return -1;
1925 }
1926 os_memcpy(pmk_r0, r0_key_data, q);
1927 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, q);
1928 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0Name-Salt", &r0_key_data[q], 16);
1929
1930 /*
1931 * PMKR0Name = Truncate-128(Hash("FT-R0N" || PMK-R0Name-Salt)
1932 */
1933 addr[0] = (const u8 *) "FT-R0N";
1934 len[0] = 6;
1935 addr[1] = &r0_key_data[q];
1936 len[1] = 16;
1937
1938 #ifdef CONFIG_SHA384
1939 if (use_sha384 && sha384_vector(2, addr, len, hash) < 0)
1940 return -1;
1941 #endif /* CONFIG_SHA384 */
1942 if (!use_sha384 && sha256_vector(2, addr, len, hash) < 0)
1943 return -1;
1944 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
1945 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
1946 forced_memzero(r0_key_data, sizeof(r0_key_data));
1947 return 0;
1948 }
1949
1950
1951 /**
1952 * wpa_derive_pmk_r1_name - Derive PMKR1Name
1953 *
1954 * IEEE Std 802.11r-2008 - 8.5.1.5.4
1955 */
wpa_derive_pmk_r1_name(const u8 * pmk_r0_name,const u8 * r1kh_id,const u8 * s1kh_id,u8 * pmk_r1_name,int use_sha384)1956 int wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
1957 const u8 *s1kh_id, u8 *pmk_r1_name, int use_sha384)
1958 {
1959 u8 hash[48];
1960 const u8 *addr[4];
1961 size_t len[4];
1962
1963 /*
1964 * PMKR1Name = Truncate-128(Hash("FT-R1N" || PMKR0Name ||
1965 * R1KH-ID || S1KH-ID))
1966 */
1967 addr[0] = (const u8 *) "FT-R1N";
1968 len[0] = 6;
1969 addr[1] = pmk_r0_name;
1970 len[1] = WPA_PMK_NAME_LEN;
1971 addr[2] = r1kh_id;
1972 len[2] = FT_R1KH_ID_LEN;
1973 addr[3] = s1kh_id;
1974 len[3] = ETH_ALEN;
1975
1976 #ifdef CONFIG_SHA384
1977 if (use_sha384 && sha384_vector(4, addr, len, hash) < 0)
1978 return -1;
1979 #endif /* CONFIG_SHA384 */
1980 if (!use_sha384 && sha256_vector(4, addr, len, hash) < 0)
1981 return -1;
1982 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
1983 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
1984 return 0;
1985 }
1986
1987
1988 /**
1989 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
1990 *
1991 * IEEE Std 802.11r-2008 - 8.5.1.5.4
1992 */
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)1993 int wpa_derive_pmk_r1(const u8 *pmk_r0, size_t pmk_r0_len,
1994 const u8 *pmk_r0_name,
1995 const u8 *r1kh_id, const u8 *s1kh_id,
1996 u8 *pmk_r1, u8 *pmk_r1_name)
1997 {
1998 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
1999 u8 *pos;
2000
2001 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
2002 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R1 using KDF-%s",
2003 pmk_r0_len == SHA384_MAC_LEN ? "SHA384" : "SHA256");
2004 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len);
2005 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", r1kh_id, FT_R1KH_ID_LEN);
2006 wpa_printf(MSG_DEBUG, "FT: S1KH-ID: " MACSTR_SEC, MAC2STR_SEC(s1kh_id));
2007 pos = buf;
2008 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
2009 pos += FT_R1KH_ID_LEN;
2010 os_memcpy(pos, s1kh_id, ETH_ALEN);
2011 pos += ETH_ALEN;
2012
2013 #ifdef CONFIG_SHA384
2014 if (pmk_r0_len == SHA384_MAC_LEN &&
2015 sha384_prf(pmk_r0, pmk_r0_len, "FT-R1",
2016 buf, pos - buf, pmk_r1, pmk_r0_len) < 0)
2017 return -1;
2018 #endif /* CONFIG_SHA384 */
2019 if (pmk_r0_len == PMK_LEN &&
2020 sha256_prf(pmk_r0, pmk_r0_len, "FT-R1",
2021 buf, pos - buf, pmk_r1, pmk_r0_len) < 0)
2022 return -1;
2023 if (pmk_r0_len != SHA384_MAC_LEN && pmk_r0_len != PMK_LEN) {
2024 wpa_printf(MSG_ERROR, "FT: Unexpected PMK-R0 length %d",
2025 (int) pmk_r0_len);
2026 return -1;
2027 }
2028 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r0_len);
2029
2030 return wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id,
2031 pmk_r1_name,
2032 pmk_r0_len == SHA384_MAC_LEN);
2033 }
2034
2035
2036 /**
2037 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
2038 *
2039 * IEEE Std 802.11r-2008 - 8.5.1.5.5
2040 */
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)2041 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, size_t pmk_r1_len,
2042 const u8 *snonce, const u8 *anonce,
2043 const u8 *sta_addr, const u8 *bssid,
2044 const u8 *pmk_r1_name,
2045 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher,
2046 size_t kdk_len)
2047 {
2048 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
2049 u8 *pos, hash[32];
2050 const u8 *addr[6];
2051 size_t len[6];
2052 u8 tmp[2 * WPA_KCK_MAX_LEN + 2 * WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
2053 WPA_KDK_MAX_LEN];
2054 size_t ptk_len, offset;
2055 int use_sha384 = wpa_key_mgmt_sha384(akmp);
2056
2057 if (kdk_len > WPA_KDK_MAX_LEN) {
2058 wpa_printf(MSG_ERROR,
2059 "FT: KDK len=%zu exceeds max supported len",
2060 kdk_len);
2061 return -1;
2062 }
2063
2064 /*
2065 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
2066 * BSSID || STA-ADDR)
2067 */
2068 wpa_printf(MSG_DEBUG, "FT: Derive PTK using KDF-%s",
2069 use_sha384 ? "SHA384" : "SHA256");
2070 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len);
2071 wpa_hexdump(MSG_DEBUG, "FT: SNonce", snonce, WPA_NONCE_LEN);
2072 wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN);
2073 wpa_printf(MSG_DEBUG, "FT: BSSID=" MACSTR_SEC " STA-ADDR=" MACSTR_SEC,
2074 MAC2STR_SEC(bssid), MAC2STR_SEC(sta_addr));
2075 pos = buf;
2076 os_memcpy(pos, snonce, WPA_NONCE_LEN);
2077 pos += WPA_NONCE_LEN;
2078 os_memcpy(pos, anonce, WPA_NONCE_LEN);
2079 pos += WPA_NONCE_LEN;
2080 os_memcpy(pos, bssid, ETH_ALEN);
2081 pos += ETH_ALEN;
2082 os_memcpy(pos, sta_addr, ETH_ALEN);
2083 pos += ETH_ALEN;
2084
2085 ptk->kck_len = wpa_kck_len(akmp, PMK_LEN);
2086 ptk->kck2_len = wpa_kck2_len(akmp);
2087 ptk->kek_len = wpa_kek_len(akmp, PMK_LEN);
2088 ptk->kek2_len = wpa_kek2_len(akmp);
2089 ptk->tk_len = wpa_cipher_key_len(cipher);
2090 ptk->kdk_len = kdk_len;
2091 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len +
2092 ptk->kck2_len + ptk->kek2_len + ptk->kdk_len;
2093
2094 #ifdef CONFIG_SHA384
2095 if (use_sha384) {
2096 if (pmk_r1_len != SHA384_MAC_LEN) {
2097 wpa_printf(MSG_ERROR,
2098 "FT: Unexpected PMK-R1 length %d (expected %d)",
2099 (int) pmk_r1_len, SHA384_MAC_LEN);
2100 return -1;
2101 }
2102 if (sha384_prf(pmk_r1, pmk_r1_len, "FT-PTK",
2103 buf, pos - buf, tmp, ptk_len) < 0)
2104 return -1;
2105 }
2106 #endif /* CONFIG_SHA384 */
2107 if (!use_sha384) {
2108 if (pmk_r1_len != PMK_LEN) {
2109 wpa_printf(MSG_ERROR,
2110 "FT: Unexpected PMK-R1 length %d (expected %d)",
2111 (int) pmk_r1_len, PMK_LEN);
2112 return -1;
2113 }
2114 if (sha256_prf(pmk_r1, pmk_r1_len, "FT-PTK",
2115 buf, pos - buf, tmp, ptk_len) < 0)
2116 return -1;
2117 }
2118 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", tmp, ptk_len);
2119
2120 /*
2121 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
2122 * ANonce || BSSID || STA-ADDR))
2123 */
2124 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
2125 addr[0] = pmk_r1_name;
2126 len[0] = WPA_PMK_NAME_LEN;
2127 addr[1] = (const u8 *) "FT-PTKN";
2128 len[1] = 7;
2129 addr[2] = snonce;
2130 len[2] = WPA_NONCE_LEN;
2131 addr[3] = anonce;
2132 len[3] = WPA_NONCE_LEN;
2133 addr[4] = bssid;
2134 len[4] = ETH_ALEN;
2135 addr[5] = sta_addr;
2136 len[5] = ETH_ALEN;
2137
2138 if (sha256_vector(6, addr, len, hash) < 0)
2139 return -1;
2140 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
2141
2142 os_memcpy(ptk->kck, tmp, ptk->kck_len);
2143 offset = ptk->kck_len;
2144 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len);
2145 offset += ptk->kek_len;
2146 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len);
2147 offset += ptk->tk_len;
2148 os_memcpy(ptk->kck2, tmp + offset, ptk->kck2_len);
2149 offset += ptk->kck2_len;
2150 os_memcpy(ptk->kek2, tmp + offset, ptk->kek2_len);
2151 offset += ptk->kek2_len;
2152 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len);
2153
2154 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len);
2155 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len);
2156 if (ptk->kck2_len)
2157 wpa_hexdump_key(MSG_DEBUG, "FT: KCK2",
2158 ptk->kck2, ptk->kck2_len);
2159 if (ptk->kek2_len)
2160 wpa_hexdump_key(MSG_DEBUG, "FT: KEK2",
2161 ptk->kek2, ptk->kek2_len);
2162 if (ptk->kdk_len)
2163 wpa_hexdump_key(MSG_DEBUG, "FT: KDK", ptk->kdk, ptk->kdk_len);
2164
2165 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len);
2166 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
2167
2168 forced_memzero(tmp, sizeof(tmp));
2169
2170 return 0;
2171 }
2172
2173 #endif /* CONFIG_IEEE80211R */
2174
2175
2176 /**
2177 * rsn_pmkid - Calculate PMK identifier
2178 * @pmk: Pairwise master key
2179 * @pmk_len: Length of pmk in bytes
2180 * @aa: Authenticator address
2181 * @spa: Supplicant address
2182 * @pmkid: Buffer for PMKID
2183 * @akmp: Negotiated key management protocol
2184 *
2185 * IEEE Std 802.11-2016 - 12.7.1.3 Pairwise key hierarchy
2186 * AKM: 00-0F-AC:5, 00-0F-AC:6, 00-0F-AC:14, 00-0F-AC:16
2187 * PMKID = Truncate-128(HMAC-SHA-256(PMK, "PMK Name" || AA || SPA))
2188 * AKM: 00-0F-AC:11
2189 * See rsn_pmkid_suite_b()
2190 * AKM: 00-0F-AC:12
2191 * See rsn_pmkid_suite_b_192()
2192 * AKM: 00-0F-AC:13, 00-0F-AC:15, 00-0F-AC:17
2193 * PMKID = Truncate-128(HMAC-SHA-384(PMK, "PMK Name" || AA || SPA))
2194 * Otherwise:
2195 * PMKID = Truncate-128(HMAC-SHA-1(PMK, "PMK Name" || AA || SPA))
2196 */
rsn_pmkid(const u8 * pmk,size_t pmk_len,const u8 * aa,const u8 * spa,u8 * pmkid,int akmp)2197 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
2198 u8 *pmkid, int akmp)
2199 {
2200 char *title = "PMK Name";
2201 const u8 *addr[3];
2202 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
2203 unsigned char hash[SHA384_MAC_LEN];
2204
2205 addr[0] = (u8 *) title;
2206 addr[1] = aa;
2207 addr[2] = spa;
2208
2209 if (0) {
2210 #if defined(CONFIG_FILS) || defined(CONFIG_SHA384)
2211 } else if (wpa_key_mgmt_sha384(akmp)) {
2212 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-384");
2213 hmac_sha384_vector(pmk, pmk_len, 3, addr, len, hash);
2214 #endif /* CONFIG_FILS || CONFIG_SHA384 */
2215 } else if (wpa_key_mgmt_sha256(akmp)) {
2216 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-256");
2217 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
2218 } else {
2219 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-1");
2220 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
2221 }
2222 wpa_hexdump(MSG_DEBUG, "RSN: Derived PMKID", hash, PMKID_LEN);
2223 os_memcpy(pmkid, hash, PMKID_LEN);
2224 }
2225
2226
2227 #ifdef CONFIG_SUITEB
2228 /**
2229 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM
2230 * @kck: Key confirmation key
2231 * @kck_len: Length of kck in bytes
2232 * @aa: Authenticator address
2233 * @spa: Supplicant address
2234 * @pmkid: Buffer for PMKID
2235 * Returns: 0 on success, -1 on failure
2236 *
2237 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
2238 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA))
2239 */
rsn_pmkid_suite_b(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)2240 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa,
2241 const u8 *spa, u8 *pmkid)
2242 {
2243 char *title = "PMK Name";
2244 const u8 *addr[3];
2245 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
2246 unsigned char hash[SHA256_MAC_LEN];
2247
2248 addr[0] = (u8 *) title;
2249 addr[1] = aa;
2250 addr[2] = spa;
2251
2252 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0)
2253 return -1;
2254 os_memcpy(pmkid, hash, PMKID_LEN);
2255 return 0;
2256 }
2257 #endif /* CONFIG_SUITEB */
2258
2259
2260 #ifdef CONFIG_SUITEB192
2261 /**
2262 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM
2263 * @kck: Key confirmation key
2264 * @kck_len: Length of kck in bytes
2265 * @aa: Authenticator address
2266 * @spa: Supplicant address
2267 * @pmkid: Buffer for PMKID
2268 * Returns: 0 on success, -1 on failure
2269 *
2270 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
2271 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA))
2272 */
rsn_pmkid_suite_b_192(const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,u8 * pmkid)2273 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa,
2274 const u8 *spa, u8 *pmkid)
2275 {
2276 char *title = "PMK Name";
2277 const u8 *addr[3];
2278 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
2279 unsigned char hash[SHA384_MAC_LEN];
2280
2281 addr[0] = (u8 *) title;
2282 addr[1] = aa;
2283 addr[2] = spa;
2284
2285 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0)
2286 return -1;
2287 os_memcpy(pmkid, hash, PMKID_LEN);
2288 return 0;
2289 }
2290 #endif /* CONFIG_SUITEB192 */
2291
2292
2293 /**
2294 * wpa_cipher_txt - Convert cipher suite to a text string
2295 * @cipher: Cipher suite (WPA_CIPHER_* enum)
2296 * Returns: Pointer to a text string of the cipher suite name
2297 */
wpa_cipher_txt(int cipher)2298 const char * wpa_cipher_txt(int cipher)
2299 {
2300 switch (cipher) {
2301 case WPA_CIPHER_NONE:
2302 return "NONE";
2303 #ifdef CONFIG_WEP
2304 case WPA_CIPHER_WEP40:
2305 return "WEP-40";
2306 case WPA_CIPHER_WEP104:
2307 return "WEP-104";
2308 #endif /* CONFIG_WEP */
2309 case WPA_CIPHER_TKIP:
2310 return "TKIP";
2311 case WPA_CIPHER_CCMP:
2312 return "CCMP";
2313 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
2314 return "CCMP+TKIP";
2315 case WPA_CIPHER_GCMP:
2316 return "GCMP";
2317 case WPA_CIPHER_GCMP_256:
2318 return "GCMP-256";
2319 case WPA_CIPHER_CCMP_256:
2320 return "CCMP-256";
2321 case WPA_CIPHER_AES_128_CMAC:
2322 return "BIP";
2323 case WPA_CIPHER_BIP_GMAC_128:
2324 return "BIP-GMAC-128";
2325 case WPA_CIPHER_BIP_GMAC_256:
2326 return "BIP-GMAC-256";
2327 case WPA_CIPHER_BIP_CMAC_256:
2328 return "BIP-CMAC-256";
2329 #ifdef CONFIG_WAPI
2330 case WPA_CIPHER_SMS4:
2331 return "SMS4";
2332 #endif
2333 case WPA_CIPHER_GTK_NOT_USED:
2334 return "GTK_NOT_USED";
2335 default:
2336 return "UNKNOWN";
2337 }
2338 }
2339
2340
2341 /**
2342 * wpa_key_mgmt_txt - Convert key management suite to a text string
2343 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
2344 * @proto: WPA/WPA2 version (WPA_PROTO_*)
2345 * Returns: Pointer to a text string of the key management suite name
2346 */
wpa_key_mgmt_txt(int key_mgmt,int proto)2347 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
2348 {
2349 switch (key_mgmt) {
2350 case WPA_KEY_MGMT_IEEE8021X:
2351 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
2352 return "WPA2+WPA/IEEE 802.1X/EAP";
2353 return proto == WPA_PROTO_RSN ?
2354 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
2355 case WPA_KEY_MGMT_PSK:
2356 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
2357 return "WPA2-PSK+WPA-PSK";
2358 return proto == WPA_PROTO_RSN ?
2359 "WPA2-PSK" : "WPA-PSK";
2360 case WPA_KEY_MGMT_NONE:
2361 return "NONE";
2362 case WPA_KEY_MGMT_WPA_NONE:
2363 return "WPA-NONE";
2364 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2365 return "IEEE 802.1X (no WPA)";
2366 #ifdef CONFIG_IEEE80211R
2367 case WPA_KEY_MGMT_FT_IEEE8021X:
2368 return "FT-EAP";
2369 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
2370 return "FT-EAP-SHA384";
2371 case WPA_KEY_MGMT_FT_PSK:
2372 return "FT-PSK";
2373 #endif /* CONFIG_IEEE80211R */
2374 case WPA_KEY_MGMT_IEEE8021X_SHA256:
2375 return "WPA2-EAP-SHA256";
2376 case WPA_KEY_MGMT_PSK_SHA256:
2377 return "WPA2-PSK-SHA256";
2378 case WPA_KEY_MGMT_WPS:
2379 return "WPS";
2380 case WPA_KEY_MGMT_SAE:
2381 return "SAE";
2382 case WPA_KEY_MGMT_FT_SAE:
2383 return "FT-SAE";
2384 case WPA_KEY_MGMT_OSEN:
2385 return "OSEN";
2386 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
2387 return "WPA2-EAP-SUITE-B";
2388 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
2389 return "WPA2-EAP-SUITE-B-192";
2390 case WPA_KEY_MGMT_FILS_SHA256:
2391 return "FILS-SHA256";
2392 case WPA_KEY_MGMT_FILS_SHA384:
2393 return "FILS-SHA384";
2394 case WPA_KEY_MGMT_FT_FILS_SHA256:
2395 return "FT-FILS-SHA256";
2396 case WPA_KEY_MGMT_FT_FILS_SHA384:
2397 return "FT-FILS-SHA384";
2398 case WPA_KEY_MGMT_OWE:
2399 return "OWE";
2400 case WPA_KEY_MGMT_DPP:
2401 return "DPP";
2402 case WPA_KEY_MGMT_PASN:
2403 return "PASN";
2404 default:
2405 return "UNKNOWN";
2406 }
2407 }
2408
2409
wpa_akm_to_suite(int akm)2410 u32 wpa_akm_to_suite(int akm)
2411 {
2412 if (akm & WPA_KEY_MGMT_FT_IEEE8021X_SHA384)
2413 return RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384;
2414 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
2415 return RSN_AUTH_KEY_MGMT_FT_802_1X;
2416 if (akm & WPA_KEY_MGMT_FT_PSK)
2417 return RSN_AUTH_KEY_MGMT_FT_PSK;
2418 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
2419 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
2420 if (akm & WPA_KEY_MGMT_IEEE8021X)
2421 return RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
2422 if (akm & WPA_KEY_MGMT_PSK_SHA256)
2423 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
2424 if (akm & WPA_KEY_MGMT_PSK)
2425 return RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
2426 if (akm & WPA_KEY_MGMT_CCKM)
2427 return RSN_AUTH_KEY_MGMT_CCKM;
2428 if (akm & WPA_KEY_MGMT_OSEN)
2429 return RSN_AUTH_KEY_MGMT_OSEN;
2430 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
2431 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
2432 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
2433 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
2434 if (akm & WPA_KEY_MGMT_FILS_SHA256)
2435 return RSN_AUTH_KEY_MGMT_FILS_SHA256;
2436 if (akm & WPA_KEY_MGMT_FILS_SHA384)
2437 return RSN_AUTH_KEY_MGMT_FILS_SHA384;
2438 if (akm & WPA_KEY_MGMT_FT_FILS_SHA256)
2439 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA256;
2440 if (akm & WPA_KEY_MGMT_FT_FILS_SHA384)
2441 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA384;
2442 if (akm & WPA_KEY_MGMT_SAE)
2443 return RSN_AUTH_KEY_MGMT_SAE;
2444 if (akm & WPA_KEY_MGMT_FT_SAE)
2445 return RSN_AUTH_KEY_MGMT_FT_SAE;
2446 if (akm & WPA_KEY_MGMT_OWE)
2447 return RSN_AUTH_KEY_MGMT_OWE;
2448 if (akm & WPA_KEY_MGMT_DPP)
2449 return RSN_AUTH_KEY_MGMT_DPP;
2450 return 0;
2451 }
2452
2453
wpa_compare_rsn_ie(int ft_initial_assoc,const u8 * ie1,size_t ie1len,const u8 * ie2,size_t ie2len)2454 int wpa_compare_rsn_ie(int ft_initial_assoc,
2455 const u8 *ie1, size_t ie1len,
2456 const u8 *ie2, size_t ie2len)
2457 {
2458 if (ie1 == NULL || ie2 == NULL)
2459 return -1;
2460
2461 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
2462 return 0; /* identical IEs */
2463
2464 #ifdef CONFIG_IEEE80211R
2465 if (ft_initial_assoc) {
2466 struct wpa_ie_data ie1d, ie2d;
2467 /*
2468 * The PMKID-List in RSN IE is different between Beacon/Probe
2469 * Response/(Re)Association Request frames and EAPOL-Key
2470 * messages in FT initial mobility domain association. Allow
2471 * for this, but verify that other parts of the RSN IEs are
2472 * identical.
2473 */
2474 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
2475 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
2476 return -1;
2477 if (ie1d.proto == ie2d.proto &&
2478 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
2479 ie1d.group_cipher == ie2d.group_cipher &&
2480 ie1d.key_mgmt == ie2d.key_mgmt &&
2481 ie1d.capabilities == ie2d.capabilities &&
2482 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
2483 return 0;
2484 }
2485 #endif /* CONFIG_IEEE80211R */
2486
2487 return -1;
2488 }
2489
2490
wpa_insert_pmkid(u8 * ies,size_t * ies_len,const u8 * pmkid)2491 int wpa_insert_pmkid(u8 *ies, size_t *ies_len, const u8 *pmkid)
2492 {
2493 u8 *start, *end, *rpos, *rend;
2494 int added = 0;
2495
2496 start = ies;
2497 end = ies + *ies_len;
2498
2499 while (start < end) {
2500 if (*start == WLAN_EID_RSN)
2501 break;
2502 start += 2 + start[1];
2503 }
2504 if (start >= end) {
2505 wpa_printf(MSG_ERROR, "RSN: Could not find RSNE in IEs data");
2506 return -1;
2507 }
2508 wpa_hexdump(MSG_DEBUG, "RSN: RSNE before modification",
2509 start, 2 + start[1]);
2510
2511 /* Find start of PMKID-Count */
2512 rpos = start + 2;
2513 rend = rpos + start[1];
2514
2515 /* Skip Version and Group Data Cipher Suite */
2516 rpos += 2 + 4;
2517 /* Skip Pairwise Cipher Suite Count and List */
2518 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
2519 /* Skip AKM Suite Count and List */
2520 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
2521
2522 if (rpos == rend) {
2523 /* Add RSN Capabilities */
2524 os_memmove(rpos + 2, rpos, end - rpos);
2525 *rpos++ = 0;
2526 *rpos++ = 0;
2527 added += 2;
2528 start[1] += 2;
2529 rend = rpos;
2530 } else {
2531 /* Skip RSN Capabilities */
2532 rpos += 2;
2533 if (rpos > rend) {
2534 wpa_printf(MSG_ERROR,
2535 "RSN: Could not parse RSNE in IEs data");
2536 return -1;
2537 }
2538 }
2539
2540 if (rpos == rend) {
2541 /* No PMKID-Count field included; add it */
2542 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos);
2543 WPA_PUT_LE16(rpos, 1);
2544 rpos += 2;
2545 os_memcpy(rpos, pmkid, PMKID_LEN);
2546 added += 2 + PMKID_LEN;
2547 start[1] += 2 + PMKID_LEN;
2548 } else {
2549 u16 num_pmkid;
2550
2551 if (rend - rpos < 2)
2552 return -1;
2553 num_pmkid = WPA_GET_LE16(rpos);
2554 /* PMKID-Count was included; use it */
2555 if (num_pmkid != 0) {
2556 u8 *after;
2557
2558 if (num_pmkid * PMKID_LEN > rend - rpos - 2)
2559 return -1;
2560 /*
2561 * PMKID may have been included in RSN IE in
2562 * (Re)Association Request frame, so remove the old
2563 * PMKID(s) first before adding the new one.
2564 */
2565 wpa_printf(MSG_DEBUG,
2566 "RSN: Remove %u old PMKID(s) from RSNE",
2567 num_pmkid);
2568 after = rpos + 2 + num_pmkid * PMKID_LEN;
2569 os_memmove(rpos + 2, after, end - after);
2570 start[1] -= num_pmkid * PMKID_LEN;
2571 added -= num_pmkid * PMKID_LEN;
2572 }
2573 WPA_PUT_LE16(rpos, 1);
2574 rpos += 2;
2575 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos);
2576 os_memcpy(rpos, pmkid, PMKID_LEN);
2577 added += PMKID_LEN;
2578 start[1] += PMKID_LEN;
2579 }
2580
2581 wpa_hexdump(MSG_DEBUG, "RSN: RSNE after modification (PMKID inserted)",
2582 start, 2 + start[1]);
2583
2584 *ies_len += added;
2585
2586 return 0;
2587 }
2588
2589
wpa_cipher_key_len(int cipher)2590 int wpa_cipher_key_len(int cipher)
2591 {
2592 switch (cipher) {
2593 case WPA_CIPHER_CCMP_256:
2594 case WPA_CIPHER_GCMP_256:
2595 case WPA_CIPHER_BIP_GMAC_256:
2596 case WPA_CIPHER_BIP_CMAC_256:
2597 return 32;
2598 case WPA_CIPHER_CCMP:
2599 case WPA_CIPHER_GCMP:
2600 case WPA_CIPHER_AES_128_CMAC:
2601 case WPA_CIPHER_BIP_GMAC_128:
2602 return 16;
2603 case WPA_CIPHER_TKIP:
2604 return 32;
2605 }
2606
2607 return 0;
2608 }
2609
2610
wpa_cipher_rsc_len(int cipher)2611 int wpa_cipher_rsc_len(int cipher)
2612 {
2613 switch (cipher) {
2614 case WPA_CIPHER_CCMP_256:
2615 case WPA_CIPHER_GCMP_256:
2616 case WPA_CIPHER_CCMP:
2617 case WPA_CIPHER_GCMP:
2618 case WPA_CIPHER_TKIP:
2619 return 6;
2620 }
2621
2622 return 0;
2623 }
2624
2625
wpa_cipher_to_alg(int cipher)2626 enum wpa_alg wpa_cipher_to_alg(int cipher)
2627 {
2628 switch (cipher) {
2629 case WPA_CIPHER_CCMP_256:
2630 return WPA_ALG_CCMP_256;
2631 case WPA_CIPHER_GCMP_256:
2632 return WPA_ALG_GCMP_256;
2633 case WPA_CIPHER_CCMP:
2634 return WPA_ALG_CCMP;
2635 case WPA_CIPHER_GCMP:
2636 return WPA_ALG_GCMP;
2637 case WPA_CIPHER_TKIP:
2638 return WPA_ALG_TKIP;
2639 case WPA_CIPHER_AES_128_CMAC:
2640 return WPA_ALG_BIP_CMAC_128;
2641 case WPA_CIPHER_BIP_GMAC_128:
2642 return WPA_ALG_BIP_GMAC_128;
2643 case WPA_CIPHER_BIP_GMAC_256:
2644 return WPA_ALG_BIP_GMAC_256;
2645 case WPA_CIPHER_BIP_CMAC_256:
2646 return WPA_ALG_BIP_CMAC_256;
2647 }
2648 return WPA_ALG_NONE;
2649 }
2650
2651
wpa_cipher_valid_pairwise(int cipher)2652 int wpa_cipher_valid_pairwise(int cipher)
2653 {
2654 #ifdef CONFIG_NO_TKIP
2655 return cipher == WPA_CIPHER_CCMP_256 ||
2656 cipher == WPA_CIPHER_GCMP_256 ||
2657 cipher == WPA_CIPHER_CCMP ||
2658 #ifdef CONFIG_WAPI
2659 cipher == WPA_CIPHER_SMS4 ||
2660 #endif
2661 cipher == WPA_CIPHER_GCMP;
2662 #else /* CONFIG_NO_TKIP */
2663 return cipher == WPA_CIPHER_CCMP_256 ||
2664 cipher == WPA_CIPHER_GCMP_256 ||
2665 cipher == WPA_CIPHER_CCMP ||
2666 cipher == WPA_CIPHER_GCMP ||
2667 #ifdef CONFIG_WAPI
2668 cipher == WPA_CIPHER_SMS4 ||
2669 #endif
2670 cipher == WPA_CIPHER_TKIP;
2671 #endif /* CONFIG_NO_TKIP */
2672 }
2673
2674
wpa_cipher_to_suite(int proto,int cipher)2675 u32 wpa_cipher_to_suite(int proto, int cipher)
2676 {
2677 if (cipher & WPA_CIPHER_CCMP_256)
2678 return RSN_CIPHER_SUITE_CCMP_256;
2679 if (cipher & WPA_CIPHER_GCMP_256)
2680 return RSN_CIPHER_SUITE_GCMP_256;
2681 if (cipher & WPA_CIPHER_CCMP)
2682 return (proto == WPA_PROTO_RSN ?
2683 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
2684 if (cipher & WPA_CIPHER_GCMP)
2685 return RSN_CIPHER_SUITE_GCMP;
2686 if (cipher & WPA_CIPHER_TKIP)
2687 return (proto == WPA_PROTO_RSN ?
2688 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
2689 if (cipher & WPA_CIPHER_NONE)
2690 return (proto == WPA_PROTO_RSN ?
2691 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
2692 if (cipher & WPA_CIPHER_GTK_NOT_USED)
2693 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
2694 if (cipher & WPA_CIPHER_AES_128_CMAC)
2695 return RSN_CIPHER_SUITE_AES_128_CMAC;
2696 if (cipher & WPA_CIPHER_BIP_GMAC_128)
2697 return RSN_CIPHER_SUITE_BIP_GMAC_128;
2698 if (cipher & WPA_CIPHER_BIP_GMAC_256)
2699 return RSN_CIPHER_SUITE_BIP_GMAC_256;
2700 if (cipher & WPA_CIPHER_BIP_CMAC_256)
2701 return RSN_CIPHER_SUITE_BIP_CMAC_256;
2702 #ifdef CONFIG_WAPI
2703 if (cipher & WPA_CIPHER_SMS4)
2704 return RSN_CIPHER_SUITE_SMS4;
2705 #endif
2706 return 0;
2707 }
2708
2709
rsn_cipher_put_suites(u8 * start,int ciphers)2710 int rsn_cipher_put_suites(u8 *start, int ciphers)
2711 {
2712 u8 *pos = start;
2713
2714 if (ciphers & WPA_CIPHER_CCMP_256) {
2715 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
2716 pos += RSN_SELECTOR_LEN;
2717 }
2718 if (ciphers & WPA_CIPHER_GCMP_256) {
2719 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
2720 pos += RSN_SELECTOR_LEN;
2721 }
2722 if (ciphers & WPA_CIPHER_CCMP) {
2723 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
2724 pos += RSN_SELECTOR_LEN;
2725 }
2726 if (ciphers & WPA_CIPHER_GCMP) {
2727 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
2728 pos += RSN_SELECTOR_LEN;
2729 }
2730 if (ciphers & WPA_CIPHER_TKIP) {
2731 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
2732 pos += RSN_SELECTOR_LEN;
2733 }
2734 if (ciphers & WPA_CIPHER_NONE) {
2735 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
2736 pos += RSN_SELECTOR_LEN;
2737 }
2738
2739 return (pos - start) / RSN_SELECTOR_LEN;
2740 }
2741
2742
wpa_cipher_put_suites(u8 * start,int ciphers)2743 int wpa_cipher_put_suites(u8 *start, int ciphers)
2744 {
2745 u8 *pos = start;
2746
2747 if (ciphers & WPA_CIPHER_CCMP) {
2748 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
2749 pos += WPA_SELECTOR_LEN;
2750 }
2751 if (ciphers & WPA_CIPHER_TKIP) {
2752 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
2753 pos += WPA_SELECTOR_LEN;
2754 }
2755 if (ciphers & WPA_CIPHER_NONE) {
2756 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
2757 pos += WPA_SELECTOR_LEN;
2758 }
2759
2760 return (pos - start) / RSN_SELECTOR_LEN;
2761 }
2762
2763
wpa_pick_pairwise_cipher(int ciphers,int none_allowed)2764 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
2765 {
2766 if (ciphers & WPA_CIPHER_CCMP_256)
2767 return WPA_CIPHER_CCMP_256;
2768 if (ciphers & WPA_CIPHER_GCMP_256)
2769 return WPA_CIPHER_GCMP_256;
2770 if (ciphers & WPA_CIPHER_CCMP)
2771 return WPA_CIPHER_CCMP;
2772 if (ciphers & WPA_CIPHER_GCMP)
2773 return WPA_CIPHER_GCMP;
2774 if (ciphers & WPA_CIPHER_TKIP)
2775 return WPA_CIPHER_TKIP;
2776 #ifdef CONFIG_WAPI
2777 if (ciphers & WPA_CIPHER_SMS4)
2778 return WPA_CIPHER_SMS4;
2779 #endif
2780 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
2781 return WPA_CIPHER_NONE;
2782 return -1;
2783 }
2784
2785
wpa_pick_group_cipher(int ciphers)2786 int wpa_pick_group_cipher(int ciphers)
2787 {
2788 if (ciphers & WPA_CIPHER_CCMP_256)
2789 return WPA_CIPHER_CCMP_256;
2790 if (ciphers & WPA_CIPHER_GCMP_256)
2791 return WPA_CIPHER_GCMP_256;
2792 if (ciphers & WPA_CIPHER_CCMP)
2793 return WPA_CIPHER_CCMP;
2794 if (ciphers & WPA_CIPHER_GCMP)
2795 return WPA_CIPHER_GCMP;
2796 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
2797 return WPA_CIPHER_GTK_NOT_USED;
2798 if (ciphers & WPA_CIPHER_TKIP)
2799 return WPA_CIPHER_TKIP;
2800 #ifdef CONFIG_WAPI
2801 if (ciphers & WPA_CIPHER_SMS4)
2802 return WPA_CIPHER_SMS4;
2803 #endif
2804 return -1;
2805 }
2806
2807
wpa_parse_cipher(const char * value)2808 int wpa_parse_cipher(const char *value)
2809 {
2810 int val = 0, last;
2811 char *start, *end, *buf;
2812
2813 buf = os_strdup(value);
2814 if (buf == NULL)
2815 return -1;
2816 start = buf;
2817
2818 while (*start != '\0') {
2819 while (*start == ' ' || *start == '\t')
2820 start++;
2821 if (*start == '\0')
2822 break;
2823 end = start;
2824 while (*end != ' ' && *end != '\t' && *end != '\0')
2825 end++;
2826 last = *end == '\0';
2827 *end = '\0';
2828 if (os_strcmp(start, "CCMP-256") == 0)
2829 val |= WPA_CIPHER_CCMP_256;
2830 else if (os_strcmp(start, "GCMP-256") == 0)
2831 val |= WPA_CIPHER_GCMP_256;
2832 else if (os_strcmp(start, "CCMP") == 0)
2833 val |= WPA_CIPHER_CCMP;
2834 else if (os_strcmp(start, "GCMP") == 0)
2835 val |= WPA_CIPHER_GCMP;
2836 #ifndef CONFIG_NO_TKIP
2837 else if (os_strcmp(start, "TKIP") == 0)
2838 val |= WPA_CIPHER_TKIP;
2839 #endif /* CONFIG_NO_TKIP */
2840 #ifdef CONFIG_WEP
2841 else if (os_strcmp(start, "WEP104") == 0)
2842 val |= WPA_CIPHER_WEP104;
2843 else if (os_strcmp(start, "WEP40") == 0)
2844 val |= WPA_CIPHER_WEP40;
2845 #endif /* CONFIG_WEP */
2846 else if (os_strcmp(start, "NONE") == 0)
2847 val |= WPA_CIPHER_NONE;
2848 #ifdef CONFIG_WAPI
2849 else if (os_strcmp(start, "SMS4") == 0)
2850 val |= WPA_CIPHER_SMS4;
2851 #endif
2852 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
2853 val |= WPA_CIPHER_GTK_NOT_USED;
2854 else if (os_strcmp(start, "AES-128-CMAC") == 0)
2855 val |= WPA_CIPHER_AES_128_CMAC;
2856 else if (os_strcmp(start, "BIP-GMAC-128") == 0)
2857 val |= WPA_CIPHER_BIP_GMAC_128;
2858 else if (os_strcmp(start, "BIP-GMAC-256") == 0)
2859 val |= WPA_CIPHER_BIP_GMAC_256;
2860 else if (os_strcmp(start, "BIP-CMAC-256") == 0)
2861 val |= WPA_CIPHER_BIP_CMAC_256;
2862 else {
2863 os_free(buf);
2864 return -1;
2865 }
2866
2867 if (last)
2868 break;
2869 start = end + 1;
2870 }
2871 os_free(buf);
2872
2873 return val;
2874 }
2875
2876
wpa_write_ciphers(char * start,char * end,int ciphers,const char * delim)2877 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
2878 {
2879 char *pos = start;
2880 int ret;
2881
2882 if (ciphers & WPA_CIPHER_CCMP_256) {
2883 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
2884 pos == start ? "" : delim);
2885 if (os_snprintf_error(end - pos, ret))
2886 return -1;
2887 pos += ret;
2888 }
2889 if (ciphers & WPA_CIPHER_GCMP_256) {
2890 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
2891 pos == start ? "" : delim);
2892 if (os_snprintf_error(end - pos, ret))
2893 return -1;
2894 pos += ret;
2895 }
2896 if (ciphers & WPA_CIPHER_CCMP) {
2897 ret = os_snprintf(pos, end - pos, "%sCCMP",
2898 pos == start ? "" : delim);
2899 if (os_snprintf_error(end - pos, ret))
2900 return -1;
2901 pos += ret;
2902 }
2903 if (ciphers & WPA_CIPHER_GCMP) {
2904 ret = os_snprintf(pos, end - pos, "%sGCMP",
2905 pos == start ? "" : delim);
2906 if (os_snprintf_error(end - pos, ret))
2907 return -1;
2908 pos += ret;
2909 }
2910 if (ciphers & WPA_CIPHER_TKIP) {
2911 ret = os_snprintf(pos, end - pos, "%sTKIP",
2912 pos == start ? "" : delim);
2913 if (os_snprintf_error(end - pos, ret))
2914 return -1;
2915 pos += ret;
2916 }
2917 if (ciphers & WPA_CIPHER_AES_128_CMAC) {
2918 ret = os_snprintf(pos, end - pos, "%sAES-128-CMAC",
2919 pos == start ? "" : delim);
2920 if (os_snprintf_error(end - pos, ret))
2921 return -1;
2922 pos += ret;
2923 }
2924 if (ciphers & WPA_CIPHER_BIP_GMAC_128) {
2925 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-128",
2926 pos == start ? "" : delim);
2927 if (os_snprintf_error(end - pos, ret))
2928 return -1;
2929 pos += ret;
2930 }
2931 if (ciphers & WPA_CIPHER_BIP_GMAC_256) {
2932 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-256",
2933 pos == start ? "" : delim);
2934 if (os_snprintf_error(end - pos, ret))
2935 return -1;
2936 pos += ret;
2937 }
2938 if (ciphers & WPA_CIPHER_BIP_CMAC_256) {
2939 ret = os_snprintf(pos, end - pos, "%sBIP-CMAC-256",
2940 pos == start ? "" : delim);
2941 if (os_snprintf_error(end - pos, ret))
2942 return -1;
2943 pos += ret;
2944 }
2945 if (ciphers & WPA_CIPHER_NONE) {
2946 ret = os_snprintf(pos, end - pos, "%sNONE",
2947 pos == start ? "" : delim);
2948 if (os_snprintf_error(end - pos, ret))
2949 return -1;
2950 pos += ret;
2951 }
2952 #ifdef CONFIG_WAPI
2953 if (ciphers & WPA_CIPHER_SMS4) {
2954 ret = os_snprintf(pos, end - pos, "%sSMS4",
2955 pos == start ? "" : delim);
2956 if (os_snprintf_error(end - pos, ret)) {
2957 return -1;
2958 }
2959 pos += ret;
2960 }
2961 #endif
2962
2963 return pos - start;
2964 }
2965
2966
wpa_select_ap_group_cipher(int wpa,int wpa_pairwise,int rsn_pairwise)2967 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
2968 {
2969 int pairwise = 0;
2970
2971 /* Select group cipher based on the enabled pairwise cipher suites */
2972 if (wpa & 1)
2973 pairwise |= wpa_pairwise;
2974 if (wpa & 2)
2975 pairwise |= rsn_pairwise;
2976
2977 if (pairwise & WPA_CIPHER_TKIP)
2978 return WPA_CIPHER_TKIP;
2979 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
2980 return WPA_CIPHER_GCMP;
2981 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
2982 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
2983 return WPA_CIPHER_GCMP_256;
2984 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
2985 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
2986 return WPA_CIPHER_CCMP_256;
2987 return WPA_CIPHER_CCMP;
2988 }
2989
2990
2991 #ifdef CONFIG_FILS
fils_domain_name_hash(const char * domain,u8 * hash)2992 int fils_domain_name_hash(const char *domain, u8 *hash)
2993 {
2994 char buf[255], *wpos = buf;
2995 const char *pos = domain;
2996 size_t len;
2997 const u8 *addr[1];
2998 u8 mac[SHA256_MAC_LEN];
2999
3000 for (len = 0; len < sizeof(buf) && *pos; len++) {
3001 if (isalpha(*pos) && isupper(*pos))
3002 *wpos++ = tolower(*pos);
3003 else
3004 *wpos++ = *pos;
3005 pos++;
3006 }
3007
3008 addr[0] = (const u8 *) buf;
3009 if (sha256_vector(1, addr, &len, mac) < 0)
3010 return -1;
3011 os_memcpy(hash, mac, 2);
3012 return 0;
3013 }
3014 #endif /* CONFIG_FILS */
3015
3016
3017 /**
3018 * wpa_parse_vendor_specific - Parse Vendor Specific IEs
3019 * @pos: Pointer to the IE header
3020 * @end: Pointer to the end of the Key Data buffer
3021 * @ie: Pointer to parsed IE data
3022 */
wpa_parse_vendor_specific(const u8 * pos,const u8 * end,struct wpa_eapol_ie_parse * ie)3023 static void wpa_parse_vendor_specific(const u8 *pos, const u8 *end,
3024 struct wpa_eapol_ie_parse *ie)
3025 {
3026 unsigned int oui;
3027
3028 if (pos[1] < 4) {
3029 wpa_printf(MSG_MSGDUMP,
3030 "Too short vendor specific IE ignored (len=%u)",
3031 pos[1]);
3032 return;
3033 }
3034
3035 oui = WPA_GET_BE24(&pos[2]);
3036 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) {
3037 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) {
3038 ie->wmm = &pos[2];
3039 ie->wmm_len = pos[1];
3040 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE",
3041 ie->wmm, ie->wmm_len);
3042 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) {
3043 ie->wmm = &pos[2];
3044 ie->wmm_len = pos[1];
3045 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element",
3046 ie->wmm, ie->wmm_len);
3047 }
3048 }
3049 }
3050
3051
3052 /**
3053 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
3054 * @pos: Pointer to the IE header
3055 * @ie: Pointer to parsed IE data
3056 * Returns: 0 on success, 1 if end mark is found, 2 if KDE is not recognized
3057 */
wpa_parse_generic(const u8 * pos,struct wpa_eapol_ie_parse * ie)3058 static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie)
3059 {
3060 if (pos[1] == 0)
3061 return 1;
3062
3063 if (pos[1] >= 6 &&
3064 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
3065 pos[2 + WPA_SELECTOR_LEN] == 1 &&
3066 pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
3067 ie->wpa_ie = pos;
3068 ie->wpa_ie_len = pos[1] + 2;
3069 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
3070 ie->wpa_ie, ie->wpa_ie_len);
3071 return 0;
3072 }
3073
3074 if (pos[1] >= 4 && WPA_GET_BE32(pos + 2) == OSEN_IE_VENDOR_TYPE) {
3075 ie->osen = pos;
3076 ie->osen_len = pos[1] + 2;
3077 return 0;
3078 }
3079
3080 if (pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
3081 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
3082 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
3083 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
3084 pos, pos[1] + 2);
3085 return 0;
3086 }
3087
3088 if (pos[1] >= RSN_SELECTOR_LEN + 2 &&
3089 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_KEYID) {
3090 ie->key_id = pos + 2 + RSN_SELECTOR_LEN;
3091 wpa_hexdump(MSG_DEBUG, "WPA: KeyID in EAPOL-Key",
3092 pos, pos[1] + 2);
3093 return 0;
3094 }
3095
3096 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
3097 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
3098 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
3099 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
3100 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
3101 pos, pos[1] + 2);
3102 return 0;
3103 }
3104
3105 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
3106 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
3107 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
3108 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
3109 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
3110 pos, pos[1] + 2);
3111 return 0;
3112 }
3113
3114 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
3115 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
3116 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
3117 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
3118 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
3119 pos, pos[1] + 2);
3120 return 0;
3121 }
3122
3123 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
3124 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_BIGTK) {
3125 ie->bigtk = pos + 2 + RSN_SELECTOR_LEN;
3126 ie->bigtk_len = pos[1] - RSN_SELECTOR_LEN;
3127 wpa_hexdump_key(MSG_DEBUG, "WPA: BIGTK in EAPOL-Key",
3128 pos, pos[1] + 2);
3129 return 0;
3130 }
3131
3132 if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
3133 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
3134 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
3135 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
3136 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
3137 return 0;
3138 }
3139
3140 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
3141 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
3142 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
3143 wpa_hexdump(MSG_DEBUG,
3144 "WPA: IP Address Allocation in EAPOL-Key",
3145 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
3146 return 0;
3147 }
3148
3149 if (pos[1] > RSN_SELECTOR_LEN + 2 &&
3150 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_OCI) {
3151 ie->oci = pos + 2 + RSN_SELECTOR_LEN;
3152 ie->oci_len = pos[1] - RSN_SELECTOR_LEN;
3153 wpa_hexdump(MSG_DEBUG, "WPA: OCI KDE in EAPOL-Key",
3154 pos, pos[1] + 2);
3155 return 0;
3156 }
3157
3158 if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
3159 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_TRANSITION_DISABLE) {
3160 ie->transition_disable = pos + 2 + RSN_SELECTOR_LEN;
3161 ie->transition_disable_len = pos[1] - RSN_SELECTOR_LEN;
3162 wpa_hexdump(MSG_DEBUG,
3163 "WPA: Transition Disable KDE in EAPOL-Key",
3164 pos, pos[1] + 2);
3165 return 0;
3166 }
3167
3168 if (pos[1] >= RSN_SELECTOR_LEN + 2 &&
3169 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_DPP) {
3170 ie->dpp_kde = pos + 2 + RSN_SELECTOR_LEN;
3171 ie->dpp_kde_len = pos[1] - RSN_SELECTOR_LEN;
3172 wpa_hexdump(MSG_DEBUG, "WPA: DPP KDE in EAPOL-Key",
3173 pos, pos[1] + 2);
3174 return 0;
3175 }
3176
3177 return 2;
3178 }
3179
3180
3181 /**
3182 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs
3183 * @buf: Pointer to the Key Data buffer
3184 * @len: Key Data Length
3185 * @ie: Pointer to parsed IE data
3186 * Returns: 0 on success, -1 on failure
3187 */
wpa_parse_kde_ies(const u8 * buf,size_t len,struct wpa_eapol_ie_parse * ie)3188 int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie)
3189 {
3190 const u8 *pos, *end;
3191 int ret = 0;
3192
3193 os_memset(ie, 0, sizeof(*ie));
3194 for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) {
3195 if (pos[0] == 0xdd &&
3196 ((pos == buf + len - 1) || pos[1] == 0)) {
3197 /* Ignore padding */
3198 break;
3199 }
3200 if (2 + pos[1] > end - pos) {
3201 wpa_printf(MSG_DEBUG,
3202 "WPA: EAPOL-Key Key Data underflow (ie=%d len=%d pos=%d)",
3203 pos[0], pos[1], (int) (pos - buf));
3204 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", buf, len);
3205 ret = -1;
3206 break;
3207 }
3208 if (*pos == WLAN_EID_RSN) {
3209 ie->rsn_ie = pos;
3210 ie->rsn_ie_len = pos[1] + 2;
3211 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
3212 ie->rsn_ie, ie->rsn_ie_len);
3213 } else if (*pos == WLAN_EID_RSNX) {
3214 ie->rsnxe = pos;
3215 ie->rsnxe_len = pos[1] + 2;
3216 wpa_hexdump(MSG_DEBUG, "WPA: RSNXE in EAPOL-Key",
3217 ie->rsnxe, ie->rsnxe_len);
3218 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
3219 ie->mdie = pos;
3220 ie->mdie_len = pos[1] + 2;
3221 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
3222 ie->mdie, ie->mdie_len);
3223 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
3224 ie->ftie = pos;
3225 ie->ftie_len = pos[1] + 2;
3226 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
3227 ie->ftie, ie->ftie_len);
3228 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
3229 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
3230 ie->reassoc_deadline = pos;
3231 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
3232 "in EAPOL-Key",
3233 ie->reassoc_deadline, pos[1] + 2);
3234 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
3235 ie->key_lifetime = pos;
3236 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
3237 "in EAPOL-Key",
3238 ie->key_lifetime, pos[1] + 2);
3239 } else {
3240 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
3241 "EAPOL-Key Key Data IE",
3242 pos, 2 + pos[1]);
3243 }
3244 } else if (*pos == WLAN_EID_LINK_ID) {
3245 if (pos[1] >= 18) {
3246 ie->lnkid = pos;
3247 ie->lnkid_len = pos[1] + 2;
3248 }
3249 } else if (*pos == WLAN_EID_EXT_CAPAB) {
3250 ie->ext_capab = pos;
3251 ie->ext_capab_len = pos[1] + 2;
3252 } else if (*pos == WLAN_EID_SUPP_RATES) {
3253 ie->supp_rates = pos;
3254 ie->supp_rates_len = pos[1] + 2;
3255 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
3256 ie->ext_supp_rates = pos;
3257 ie->ext_supp_rates_len = pos[1] + 2;
3258 } else if (*pos == WLAN_EID_HT_CAP &&
3259 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) {
3260 ie->ht_capabilities = pos + 2;
3261 } else if (*pos == WLAN_EID_VHT_AID) {
3262 if (pos[1] >= 2)
3263 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff;
3264 } else if (*pos == WLAN_EID_VHT_CAP &&
3265 pos[1] >= sizeof(struct ieee80211_vht_capabilities))
3266 {
3267 ie->vht_capabilities = pos + 2;
3268 } else if (*pos == WLAN_EID_EXTENSION &&
3269 pos[1] >= 1 + IEEE80211_HE_CAPAB_MIN_LEN &&
3270 pos[2] == WLAN_EID_EXT_HE_CAPABILITIES) {
3271 ie->he_capabilities = pos + 3;
3272 ie->he_capab_len = pos[1] - 1;
3273 } else if (*pos == WLAN_EID_EXTENSION &&
3274 pos[1] >= 1 +
3275 sizeof(struct ieee80211_he_6ghz_band_cap) &&
3276 pos[2] == WLAN_EID_EXT_HE_6GHZ_BAND_CAP) {
3277 ie->he_6ghz_capabilities = pos + 3;
3278 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
3279 ie->qosinfo = pos[2];
3280 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
3281 ie->supp_channels = pos + 2;
3282 ie->supp_channels_len = pos[1];
3283 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
3284 /*
3285 * The value of the Length field of the Supported
3286 * Operating Classes element is between 2 and 253.
3287 * Silently skip invalid elements to avoid interop
3288 * issues when trying to use the value.
3289 */
3290 if (pos[1] >= 2 && pos[1] <= 253) {
3291 ie->supp_oper_classes = pos + 2;
3292 ie->supp_oper_classes_len = pos[1];
3293 }
3294 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
3295 ret = wpa_parse_generic(pos, ie);
3296 if (ret == 1) {
3297 /* end mark found */
3298 ret = 0;
3299 break;
3300 }
3301
3302 if (ret == 2) {
3303 /* not a known KDE */
3304 wpa_parse_vendor_specific(pos, end, ie);
3305 }
3306
3307 ret = 0;
3308 } else {
3309 wpa_hexdump(MSG_DEBUG,
3310 "WPA: Unrecognized EAPOL-Key Key Data IE",
3311 pos, 2 + pos[1]);
3312 }
3313 }
3314
3315 return ret;
3316 }
3317
3318
3319 #ifdef CONFIG_PASN
3320
3321 /*
3322 * wpa_pasn_build_auth_header - Add the MAC header and initialize Authentication
3323 * frame for PASN
3324 *
3325 * @buf: Buffer in which the header will be added
3326 * @bssid: The BSSID of the AP
3327 * @src: Source address
3328 * @dst: Destination address
3329 * @trans_seq: Authentication transaction sequence number
3330 * @status: Authentication status
3331 */
wpa_pasn_build_auth_header(struct wpabuf * buf,const u8 * bssid,const u8 * src,const u8 * dst,u8 trans_seq,u16 status)3332 void wpa_pasn_build_auth_header(struct wpabuf *buf, const u8 *bssid,
3333 const u8 *src, const u8 *dst,
3334 u8 trans_seq, u16 status)
3335 {
3336 struct ieee80211_mgmt *auth;
3337
3338 wpa_printf(MSG_DEBUG, "PASN: Add authentication header. trans_seq=%u",
3339 trans_seq);
3340
3341 auth = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
3342 u.auth.variable));
3343
3344 auth->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
3345 (WLAN_FC_STYPE_AUTH << 4));
3346
3347 os_memcpy(auth->da, dst, ETH_ALEN);
3348 os_memcpy(auth->sa, src, ETH_ALEN);
3349 os_memcpy(auth->bssid, bssid, ETH_ALEN);
3350 auth->seq_ctrl = 0;
3351
3352 auth->u.auth.auth_alg = host_to_le16(WLAN_AUTH_PASN);
3353 auth->u.auth.auth_transaction = host_to_le16(trans_seq);
3354 auth->u.auth.status_code = host_to_le16(status);
3355 }
3356
3357
3358 /*
3359 * wpa_pasn_add_rsne - Add an RSNE for PASN authentication
3360 * @buf: Buffer in which the IE will be added
3361 * @pmkid: Optional PMKID. Can be NULL.
3362 * @akmp: Authentication and key management protocol
3363 * @cipher: The cipher suite
3364 */
wpa_pasn_add_rsne(struct wpabuf * buf,const u8 * pmkid,int akmp,int cipher)3365 int wpa_pasn_add_rsne(struct wpabuf *buf, const u8 *pmkid, int akmp, int cipher)
3366 {
3367 struct rsn_ie_hdr *hdr;
3368 u32 suite;
3369 u16 capab;
3370 u8 *pos;
3371 u8 rsne_len;
3372
3373 wpa_printf(MSG_DEBUG, "PASN: Add RSNE");
3374
3375 rsne_len = sizeof(*hdr) + RSN_SELECTOR_LEN +
3376 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN +
3377 2 + RSN_SELECTOR_LEN + 2 + (pmkid ? PMKID_LEN : 0);
3378
3379 if (wpabuf_tailroom(buf) < rsne_len)
3380 return -1;
3381 hdr = wpabuf_put(buf, rsne_len);
3382 hdr->elem_id = WLAN_EID_RSN;
3383 hdr->len = rsne_len - 2;
3384 WPA_PUT_LE16(hdr->version, RSN_VERSION);
3385 pos = (u8 *) (hdr + 1);
3386
3387 /* Group addressed data is not allowed */
3388 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
3389 pos += RSN_SELECTOR_LEN;
3390
3391 /* Add the pairwise cipher */
3392 WPA_PUT_LE16(pos, 1);
3393 pos += 2;
3394 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, cipher);
3395 RSN_SELECTOR_PUT(pos, suite);
3396 pos += RSN_SELECTOR_LEN;
3397
3398 /* Add the AKM suite */
3399 WPA_PUT_LE16(pos, 1);
3400 pos += 2;
3401
3402 switch (akmp) {
3403 case WPA_KEY_MGMT_PASN:
3404 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PASN);
3405 break;
3406 #ifdef CONFIG_SAE
3407 case WPA_KEY_MGMT_SAE:
3408 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
3409 break;
3410 #endif /* CONFIG_SAE */
3411 #ifdef CONFIG_FILS
3412 case WPA_KEY_MGMT_FILS_SHA256:
3413 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256);
3414 break;
3415 case WPA_KEY_MGMT_FILS_SHA384:
3416 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384);
3417 break;
3418 #endif /* CONFIG_FILS */
3419 #ifdef CONFIG_IEEE80211R
3420 case WPA_KEY_MGMT_FT_PSK:
3421 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
3422 break;
3423 case WPA_KEY_MGMT_FT_IEEE8021X:
3424 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
3425 break;
3426 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
3427 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384);
3428 break;
3429 #endif /* CONFIG_IEEE80211R */
3430 default:
3431 wpa_printf(MSG_ERROR, "PASN: Invalid AKMP=0x%x", akmp);
3432 return -1;
3433 }
3434 pos += RSN_SELECTOR_LEN;
3435
3436 /* RSN Capabilities: PASN mandates both MFP capable and required */
3437 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR;
3438 WPA_PUT_LE16(pos, capab);
3439 pos += 2;
3440
3441 if (pmkid) {
3442 wpa_printf(MSG_DEBUG, "PASN: Adding PMKID");
3443
3444 WPA_PUT_LE16(pos, 1);
3445 pos += 2;
3446 os_memcpy(pos, pmkid, PMKID_LEN);
3447 pos += PMKID_LEN;
3448 } else {
3449 WPA_PUT_LE16(pos, 0);
3450 pos += 2;
3451 }
3452
3453 /* Group addressed management is not allowed */
3454 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
3455
3456 return 0;
3457 }
3458
3459
3460 /*
3461 * wpa_pasn_add_parameter_ie - Add PASN Parameters IE for PASN authentication
3462 * @buf: Buffer in which the IE will be added
3463 * @pasn_group: Finite Cyclic Group ID for PASN authentication
3464 * @wrapped_data_format: Format of the data in the Wrapped Data IE
3465 * @pubkey: A buffer holding the local public key. Can be NULL
3466 * @compressed: In case pubkey is included, indicates if the public key is
3467 * compressed (only x coordinate is included) or not (both x and y
3468 * coordinates are included)
3469 * @comeback: A buffer holding the comeback token. Can be NULL
3470 * @after: If comeback is set, defined the comeback time in seconds. -1 to not
3471 * include the Comeback After field (frames from non-AP STA).
3472 */
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)3473 void wpa_pasn_add_parameter_ie(struct wpabuf *buf, u16 pasn_group,
3474 u8 wrapped_data_format,
3475 const struct wpabuf *pubkey, bool compressed,
3476 const struct wpabuf *comeback, int after)
3477 {
3478 struct pasn_parameter_ie *params;
3479
3480 wpa_printf(MSG_DEBUG, "PASN: Add PASN Parameters element");
3481
3482 params = wpabuf_put(buf, sizeof(*params));
3483
3484 params->id = WLAN_EID_EXTENSION;
3485 params->len = sizeof(*params) - 2;
3486 params->id_ext = WLAN_EID_EXT_PASN_PARAMS;
3487 params->control = 0;
3488 params->wrapped_data_format = wrapped_data_format;
3489
3490 if (comeback) {
3491 wpa_printf(MSG_DEBUG, "PASN: Adding comeback data");
3492
3493 /*
3494 * 2 octets for the 'after' field + 1 octet for the length +
3495 * actual cookie data
3496 */
3497 if (after >= 0)
3498 params->len += 2;
3499 params->len += 1 + wpabuf_len(comeback);
3500 params->control |= WPA_PASN_CTRL_COMEBACK_INFO_PRESENT;
3501
3502 if (after >= 0)
3503 wpabuf_put_le16(buf, after);
3504 wpabuf_put_u8(buf, wpabuf_len(comeback));
3505 wpabuf_put_buf(buf, comeback);
3506 }
3507
3508 if (pubkey) {
3509 wpa_printf(MSG_DEBUG,
3510 "PASN: Adding public key and group ID %u",
3511 pasn_group);
3512
3513 /*
3514 * 2 octets for the finite cyclic group + 2 octets public key
3515 * length + 1 octet for the compressed/uncompressed indication +
3516 * the actual key.
3517 */
3518 params->len += 2 + 1 + 1 + wpabuf_len(pubkey);
3519 params->control |= WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT;
3520
3521 wpabuf_put_le16(buf, pasn_group);
3522
3523 /*
3524 * The first octet indicates whether the public key is
3525 * compressed, as defined in RFC 5480 section 2.2.
3526 */
3527 wpabuf_put_u8(buf, wpabuf_len(pubkey) + 1);
3528 wpabuf_put_u8(buf, compressed ? WPA_PASN_PUBKEY_COMPRESSED_0 :
3529 WPA_PASN_PUBKEY_UNCOMPRESSED);
3530
3531 wpabuf_put_buf(buf, pubkey);
3532 }
3533 }
3534
3535 /*
3536 * wpa_pasn_add_wrapped_data - Add a Wrapped Data IE to PASN Authentication
3537 * frame. If needed, the Wrapped Data IE would be fragmented.
3538 *
3539 * @buf: Buffer in which the IE will be added
3540 * @wrapped_data_buf: Buffer holding the wrapped data
3541 */
wpa_pasn_add_wrapped_data(struct wpabuf * buf,struct wpabuf * wrapped_data_buf)3542 int wpa_pasn_add_wrapped_data(struct wpabuf *buf,
3543 struct wpabuf *wrapped_data_buf)
3544 {
3545 const u8 *data;
3546 size_t data_len;
3547 u8 len;
3548
3549 if (!wrapped_data_buf)
3550 return 0;
3551
3552 wpa_printf(MSG_DEBUG, "PASN: Add wrapped data");
3553
3554 data = wpabuf_head_u8(wrapped_data_buf);
3555 data_len = wpabuf_len(wrapped_data_buf);
3556
3557 /* nothing to add */
3558 if (!data_len)
3559 return 0;
3560
3561 if (data_len <= 254)
3562 len = 1 + data_len;
3563 else
3564 len = 255;
3565
3566 if (wpabuf_tailroom(buf) < 3 + data_len)
3567 return -1;
3568
3569 wpabuf_put_u8(buf, WLAN_EID_EXTENSION);
3570 wpabuf_put_u8(buf, len);
3571 wpabuf_put_u8(buf, WLAN_EID_EXT_WRAPPED_DATA);
3572 wpabuf_put_data(buf, data, len - 1);
3573
3574 data += len - 1;
3575 data_len -= len - 1;
3576
3577 while (data_len) {
3578 if (wpabuf_tailroom(buf) < 1 + data_len)
3579 return -1;
3580 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT);
3581 len = data_len > 255 ? 255 : data_len;
3582 wpabuf_put_u8(buf, len);
3583 wpabuf_put_data(buf, data, len);
3584 data += len;
3585 data_len -= len;
3586 }
3587
3588 return 0;
3589 }
3590
3591
3592 /*
3593 * wpa_pasn_validate_rsne - Validate PSAN specific data of RSNE
3594 * @data: Parsed representation of an RSNE
3595 * Returns -1 for invalid data; otherwise 0
3596 */
wpa_pasn_validate_rsne(const struct wpa_ie_data * data)3597 int wpa_pasn_validate_rsne(const struct wpa_ie_data *data)
3598 {
3599 u16 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR;
3600
3601 if (data->proto != WPA_PROTO_RSN)
3602 return -1;
3603
3604 if ((data->capabilities & capab) != capab) {
3605 wpa_printf(MSG_DEBUG, "PASN: Invalid RSNE capabilities");
3606 return -1;
3607 }
3608
3609 if (!data->has_group || data->group_cipher != WPA_CIPHER_GTK_NOT_USED) {
3610 wpa_printf(MSG_DEBUG, "PASN: Invalid group data cipher");
3611 return -1;
3612 }
3613
3614 if (!data->has_pairwise || !data->pairwise_cipher ||
3615 (data->pairwise_cipher & (data->pairwise_cipher - 1))) {
3616 wpa_printf(MSG_DEBUG, "PASN: No valid pairwise suite");
3617 return -1;
3618 }
3619
3620 switch (data->key_mgmt) {
3621 #ifdef CONFIG_SAE
3622 case WPA_KEY_MGMT_SAE:
3623 /* fall through */
3624 #endif /* CONFIG_SAE */
3625 #ifdef CONFIG_FILS
3626 case WPA_KEY_MGMT_FILS_SHA256:
3627 case WPA_KEY_MGMT_FILS_SHA384:
3628 /* fall through */
3629 #endif /* CONFIG_FILS */
3630 #ifdef CONFIG_IEEE80211R
3631 case WPA_KEY_MGMT_FT_PSK:
3632 case WPA_KEY_MGMT_FT_IEEE8021X:
3633 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
3634 /* fall through */
3635 #endif /* CONFIG_IEEE80211R */
3636 case WPA_KEY_MGMT_PASN:
3637 break;
3638 default:
3639 wpa_printf(MSG_ERROR, "PASN: invalid key_mgmt: 0x%0x",
3640 data->key_mgmt);
3641 return -1;
3642 }
3643
3644 if (data->mgmt_group_cipher != WPA_CIPHER_GTK_NOT_USED) {
3645 wpa_printf(MSG_DEBUG, "PASN: Invalid group mgmt cipher");
3646 return -1;
3647 }
3648
3649 if (data->num_pmkid > 1) {
3650 wpa_printf(MSG_DEBUG, "PASN: Invalid number of PMKIDs");
3651 return -1;
3652 }
3653
3654 return 0;
3655 }
3656
3657
3658 /*
3659 * wpa_pasn_parse_parameter_ie - Validates PASN Parameters IE
3660 * @data: Pointer to the PASN Parameters IE (starting with the EID).
3661 * @len: Length of the data in the PASN Parameters IE
3662 * @from_ap: Whether this was received from an AP
3663 * @pasn_params: On successful return would hold the parsed PASN parameters.
3664 * Returns: -1 for invalid data; otherwise 0
3665 *
3666 * Note: On successful return, the pointers in &pasn_params point to the data in
3667 * the IE and are not locally allocated (so they should not be freed etc.).
3668 */
wpa_pasn_parse_parameter_ie(const u8 * data,u8 len,bool from_ap,struct wpa_pasn_params_data * pasn_params)3669 int wpa_pasn_parse_parameter_ie(const u8 *data, u8 len, bool from_ap,
3670 struct wpa_pasn_params_data *pasn_params)
3671 {
3672 struct pasn_parameter_ie *params = (struct pasn_parameter_ie *) data;
3673 const u8 *pos = (const u8 *) (params + 1);
3674
3675 if (!pasn_params) {
3676 wpa_printf(MSG_DEBUG, "PASN: Invalid params");
3677 return -1;
3678 }
3679
3680 if (!params || ((size_t) (params->len + 2) < sizeof(*params)) ||
3681 len < sizeof(*params) || params->len + 2 != len) {
3682 wpa_printf(MSG_DEBUG,
3683 "PASN: Invalid parameters IE. len=(%u, %u)",
3684 params ? params->len : 0, len);
3685 return -1;
3686 }
3687
3688 os_memset(pasn_params, 0, sizeof(*pasn_params));
3689
3690 switch (params->wrapped_data_format) {
3691 case WPA_PASN_WRAPPED_DATA_NO:
3692 case WPA_PASN_WRAPPED_DATA_SAE:
3693 case WPA_PASN_WRAPPED_DATA_FILS_SK:
3694 case WPA_PASN_WRAPPED_DATA_FT:
3695 break;
3696 default:
3697 wpa_printf(MSG_DEBUG, "PASN: Invalid wrapped data format");
3698 return -1;
3699 }
3700
3701 pasn_params->wrapped_data_format = params->wrapped_data_format;
3702
3703 len -= sizeof(*params);
3704
3705 if (params->control & WPA_PASN_CTRL_COMEBACK_INFO_PRESENT) {
3706 if (from_ap) {
3707 if (len < 2) {
3708 wpa_printf(MSG_DEBUG,
3709 "PASN: Invalid Parameters IE: Truncated Comeback After");
3710 return -1;
3711 }
3712 pasn_params->after = WPA_GET_LE16(pos);
3713 pos += 2;
3714 len -= 2;
3715 }
3716
3717 if (len < 1 || len < 1 + *pos) {
3718 wpa_printf(MSG_DEBUG,
3719 "PASN: Invalid Parameters IE: comeback len");
3720 return -1;
3721 }
3722
3723 pasn_params->comeback_len = *pos++;
3724 len--;
3725 pasn_params->comeback = pos;
3726 len -= pasn_params->comeback_len;
3727 pos += pasn_params->comeback_len;
3728 }
3729
3730 if (params->control & WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT) {
3731 if (len < 3 || len < 3 + pos[2]) {
3732 wpa_printf(MSG_DEBUG,
3733 "PASN: Invalid Parameters IE: group and key");
3734 return -1;
3735 }
3736
3737 pasn_params->group = WPA_GET_LE16(pos);
3738 pos += 2;
3739 len -= 2;
3740 pasn_params->pubkey_len = *pos++;
3741 len--;
3742 pasn_params->pubkey = pos;
3743 len -= pasn_params->pubkey_len;
3744 pos += pasn_params->pubkey_len;
3745 }
3746
3747 if (len) {
3748 wpa_printf(MSG_DEBUG,
3749 "PASN: Invalid Parameters IE. Bytes left=%u", len);
3750 return -1;
3751 }
3752
3753 return 0;
3754 }
3755
3756
wpa_pasn_add_rsnxe(struct wpabuf * buf,u16 capab)3757 void wpa_pasn_add_rsnxe(struct wpabuf *buf, u16 capab)
3758 {
3759 size_t flen;
3760
3761 flen = (capab & 0xff00) ? 2 : 1;
3762 if (!capab)
3763 return; /* no supported extended RSN capabilities */
3764 if (wpabuf_tailroom(buf) < 2 + flen)
3765 return;
3766 capab |= flen - 1; /* bit 0-3 = Field length (n - 1) */
3767
3768 wpabuf_put_u8(buf, WLAN_EID_RSNX);
3769 wpabuf_put_u8(buf, flen);
3770 wpabuf_put_u8(buf, capab & 0x00ff);
3771 capab >>= 8;
3772 if (capab)
3773 wpabuf_put_u8(buf, capab);
3774 }
3775
3776 #endif /* CONFIG_PASN */
3777