1 /* 2 * WPA/RSN - Shared functions for supplicant and authenticator 3 * Copyright (c) 2002-2018, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "crypto/md5.h" 13 #include "crypto/sha1.h" 14 #include "crypto/sha256.h" 15 #include "crypto/sha384.h" 16 #include "crypto/sha512.h" 17 #include "crypto/aes_wrap.h" 18 #include "crypto/crypto.h" 19 #include "ieee802_11_defs.h" 20 #include "defs.h" 21 #include "wpa_common.h" 22 23 24 static unsigned int wpa_kck_len(int akmp, size_t pmk_len) 25 { 26 switch (akmp) { 27 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 28 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 29 return 24; 30 case WPA_KEY_MGMT_FILS_SHA256: 31 case WPA_KEY_MGMT_FT_FILS_SHA256: 32 case WPA_KEY_MGMT_FILS_SHA384: 33 case WPA_KEY_MGMT_FT_FILS_SHA384: 34 return 0; 35 case WPA_KEY_MGMT_DPP: 36 return pmk_len / 2; 37 case WPA_KEY_MGMT_OWE: 38 return pmk_len / 2; 39 default: 40 return 16; 41 } 42 } 43 44 45 #ifdef CONFIG_IEEE80211R 46 static unsigned int wpa_kck2_len(int akmp) 47 { 48 switch (akmp) { 49 case WPA_KEY_MGMT_FT_FILS_SHA256: 50 return 16; 51 case WPA_KEY_MGMT_FT_FILS_SHA384: 52 return 24; 53 default: 54 return 0; 55 } 56 } 57 #endif /* CONFIG_IEEE80211R */ 58 59 60 static unsigned int wpa_kek_len(int akmp, size_t pmk_len) 61 { 62 switch (akmp) { 63 case WPA_KEY_MGMT_FILS_SHA384: 64 case WPA_KEY_MGMT_FT_FILS_SHA384: 65 return 64; 66 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 67 case WPA_KEY_MGMT_FILS_SHA256: 68 case WPA_KEY_MGMT_FT_FILS_SHA256: 69 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 70 return 32; 71 case WPA_KEY_MGMT_DPP: 72 return pmk_len <= 32 ? 16 : 32; 73 case WPA_KEY_MGMT_OWE: 74 return pmk_len <= 32 ? 16 : 32; 75 default: 76 return 16; 77 } 78 } 79 80 81 #ifdef CONFIG_IEEE80211R 82 static unsigned int wpa_kek2_len(int akmp) 83 { 84 switch (akmp) { 85 case WPA_KEY_MGMT_FT_FILS_SHA256: 86 return 16; 87 case WPA_KEY_MGMT_FT_FILS_SHA384: 88 return 32; 89 default: 90 return 0; 91 } 92 } 93 #endif /* CONFIG_IEEE80211R */ 94 95 96 unsigned int wpa_mic_len(int akmp, size_t pmk_len) 97 { 98 switch (akmp) { 99 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 100 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 101 return 24; 102 case WPA_KEY_MGMT_FILS_SHA256: 103 case WPA_KEY_MGMT_FILS_SHA384: 104 case WPA_KEY_MGMT_FT_FILS_SHA256: 105 case WPA_KEY_MGMT_FT_FILS_SHA384: 106 return 0; 107 case WPA_KEY_MGMT_DPP: 108 return pmk_len / 2; 109 case WPA_KEY_MGMT_OWE: 110 return pmk_len / 2; 111 default: 112 return 16; 113 } 114 } 115 116 117 /** 118 * wpa_use_akm_defined - Is AKM-defined Key Descriptor Version used 119 * @akmp: WPA_KEY_MGMT_* used in key derivation 120 * Returns: 1 if AKM-defined Key Descriptor Version is used; 0 otherwise 121 */ 122 int wpa_use_akm_defined(int akmp) 123 { 124 return akmp == WPA_KEY_MGMT_OSEN || 125 akmp == WPA_KEY_MGMT_OWE || 126 akmp == WPA_KEY_MGMT_DPP || 127 akmp == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 || 128 wpa_key_mgmt_sae(akmp) || 129 wpa_key_mgmt_suite_b(akmp) || 130 wpa_key_mgmt_fils(akmp); 131 } 132 133 134 /** 135 * wpa_use_cmac - Is CMAC integrity algorithm used for EAPOL-Key MIC 136 * @akmp: WPA_KEY_MGMT_* used in key derivation 137 * Returns: 1 if CMAC is used; 0 otherwise 138 */ 139 int wpa_use_cmac(int akmp) 140 { 141 return akmp == WPA_KEY_MGMT_OSEN || 142 akmp == WPA_KEY_MGMT_OWE || 143 akmp == WPA_KEY_MGMT_DPP || 144 wpa_key_mgmt_ft(akmp) || 145 wpa_key_mgmt_sha256(akmp) || 146 wpa_key_mgmt_sae(akmp) || 147 wpa_key_mgmt_suite_b(akmp); 148 } 149 150 151 /** 152 * wpa_use_aes_key_wrap - Is AES Keywrap algorithm used for EAPOL-Key Key Data 153 * @akmp: WPA_KEY_MGMT_* used in key derivation 154 * Returns: 1 if AES Keywrap is used; 0 otherwise 155 * 156 * Note: AKM 00-0F-AC:1 and 00-0F-AC:2 have special rules for selecting whether 157 * to use AES Keywrap based on the negotiated pairwise cipher. This function 158 * does not cover those special cases. 159 */ 160 int wpa_use_aes_key_wrap(int akmp) 161 { 162 return akmp == WPA_KEY_MGMT_OSEN || 163 akmp == WPA_KEY_MGMT_OWE || 164 akmp == WPA_KEY_MGMT_DPP || 165 wpa_key_mgmt_ft(akmp) || 166 wpa_key_mgmt_sha256(akmp) || 167 wpa_key_mgmt_sae(akmp) || 168 wpa_key_mgmt_suite_b(akmp); 169 } 170 171 172 /** 173 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC 174 * @key: EAPOL-Key Key Confirmation Key (KCK) 175 * @key_len: KCK length in octets 176 * @akmp: WPA_KEY_MGMT_* used in key derivation 177 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*) 178 * @buf: Pointer to the beginning of the EAPOL header (version field) 179 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame) 180 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written 181 * Returns: 0 on success, -1 on failure 182 * 183 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has 184 * to be cleared (all zeroes) when calling this function. 185 * 186 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the 187 * description of the Key MIC calculation. It includes packet data from the 188 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change 189 * happened during final editing of the standard and the correct behavior is 190 * defined in the last draft (IEEE 802.11i/D10). 191 */ 192 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver, 193 const u8 *buf, size_t len, u8 *mic) 194 { 195 u8 hash[SHA512_MAC_LEN]; 196 197 if (key_len == 0) { 198 wpa_printf(MSG_DEBUG, 199 "WPA: KCK not set - cannot calculate MIC"); 200 return -1; 201 } 202 203 switch (ver) { 204 #ifndef CONFIG_FIPS 205 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4: 206 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-MD5"); 207 return hmac_md5(key, key_len, buf, len, mic); 208 #endif /* CONFIG_FIPS */ 209 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES: 210 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA1"); 211 if (hmac_sha1(key, key_len, buf, len, hash)) 212 return -1; 213 os_memcpy(mic, hash, MD5_MAC_LEN); 214 break; 215 case WPA_KEY_INFO_TYPE_AES_128_CMAC: 216 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC"); 217 return omac1_aes_128(key, buf, len, mic); 218 case WPA_KEY_INFO_TYPE_AKM_DEFINED: 219 switch (akmp) { 220 #ifdef CONFIG_SAE 221 case WPA_KEY_MGMT_SAE: 222 case WPA_KEY_MGMT_FT_SAE: 223 wpa_printf(MSG_DEBUG, 224 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - SAE)"); 225 return omac1_aes_128(key, buf, len, mic); 226 #endif /* CONFIG_SAE */ 227 #ifdef CONFIG_HS20 228 case WPA_KEY_MGMT_OSEN: 229 wpa_printf(MSG_DEBUG, 230 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - OSEN)"); 231 return omac1_aes_128(key, buf, len, mic); 232 #endif /* CONFIG_HS20 */ 233 #ifdef CONFIG_SUITEB 234 case WPA_KEY_MGMT_IEEE8021X_SUITE_B: 235 wpa_printf(MSG_DEBUG, 236 "WPA: EAPOL-Key MIC using HMAC-SHA256 (AKM-defined - Suite B)"); 237 if (hmac_sha256(key, key_len, buf, len, hash)) 238 return -1; 239 os_memcpy(mic, hash, MD5_MAC_LEN); 240 break; 241 #endif /* CONFIG_SUITEB */ 242 #ifdef CONFIG_SUITEB192 243 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 244 wpa_printf(MSG_DEBUG, 245 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - Suite B 192-bit)"); 246 if (hmac_sha384(key, key_len, buf, len, hash)) 247 return -1; 248 os_memcpy(mic, hash, 24); 249 break; 250 #endif /* CONFIG_SUITEB192 */ 251 #ifdef CONFIG_OWE 252 case WPA_KEY_MGMT_OWE: 253 wpa_printf(MSG_DEBUG, 254 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - OWE)", 255 (unsigned int) key_len * 8 * 2); 256 if (key_len == 128 / 8) { 257 if (hmac_sha256(key, key_len, buf, len, hash)) 258 return -1; 259 } else if (key_len == 192 / 8) { 260 if (hmac_sha384(key, key_len, buf, len, hash)) 261 return -1; 262 } else if (key_len == 256 / 8) { 263 if (hmac_sha512(key, key_len, buf, len, hash)) 264 return -1; 265 } else { 266 wpa_printf(MSG_INFO, 267 "OWE: Unsupported KCK length: %u", 268 (unsigned int) key_len); 269 return -1; 270 } 271 os_memcpy(mic, hash, key_len); 272 break; 273 #endif /* CONFIG_OWE */ 274 #ifdef CONFIG_DPP 275 case WPA_KEY_MGMT_DPP: 276 wpa_printf(MSG_DEBUG, 277 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - DPP)", 278 (unsigned int) key_len * 8 * 2); 279 if (key_len == 128 / 8) { 280 if (hmac_sha256(key, key_len, buf, len, hash)) 281 return -1; 282 } else if (key_len == 192 / 8) { 283 if (hmac_sha384(key, key_len, buf, len, hash)) 284 return -1; 285 } else if (key_len == 256 / 8) { 286 if (hmac_sha512(key, key_len, buf, len, hash)) 287 return -1; 288 } else { 289 wpa_printf(MSG_INFO, 290 "DPP: Unsupported KCK length: %u", 291 (unsigned int) key_len); 292 return -1; 293 } 294 os_memcpy(mic, hash, key_len); 295 break; 296 #endif /* CONFIG_DPP */ 297 #if defined(CONFIG_IEEE80211R) && defined(CONFIG_SHA384) 298 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 299 wpa_printf(MSG_DEBUG, 300 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - FT 802.1X SHA384)"); 301 if (hmac_sha384(key, key_len, buf, len, hash)) 302 return -1; 303 os_memcpy(mic, hash, 24); 304 break; 305 #endif /* CONFIG_IEEE80211R && CONFIG_SHA384 */ 306 default: 307 wpa_printf(MSG_DEBUG, 308 "WPA: EAPOL-Key MIC algorithm not known (AKM-defined - akmp=0x%x)", 309 akmp); 310 return -1; 311 } 312 break; 313 default: 314 wpa_printf(MSG_DEBUG, 315 "WPA: EAPOL-Key MIC algorithm not known (ver=%d)", 316 ver); 317 return -1; 318 } 319 320 return 0; 321 } 322 323 324 /** 325 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces 326 * @pmk: Pairwise master key 327 * @pmk_len: Length of PMK 328 * @label: Label to use in derivation 329 * @addr1: AA or SA 330 * @addr2: SA or AA 331 * @nonce1: ANonce or SNonce 332 * @nonce2: SNonce or ANonce 333 * @ptk: Buffer for pairwise transient key 334 * @akmp: Negotiated AKM 335 * @cipher: Negotiated pairwise cipher 336 * @kdk_len: The length in octets that should be derived for KDK 337 * Returns: 0 on success, -1 on failure 338 * 339 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy 340 * PTK = PRF-X(PMK, "Pairwise key expansion", 341 * Min(AA, SA) || Max(AA, SA) || 342 * Min(ANonce, SNonce) || Max(ANonce, SNonce) 343 * [ || Z.x ]) 344 * 345 * The optional Z.x component is used only with DPP and that part is not defined 346 * in IEEE 802.11. 347 */ 348 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label, 349 const u8 *addr1, const u8 *addr2, 350 const u8 *nonce1, const u8 *nonce2, 351 struct wpa_ptk *ptk, int akmp, int cipher, 352 const u8 *z, size_t z_len, size_t kdk_len) 353 { 354 #define MAX_Z_LEN 66 /* with NIST P-521 */ 355 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN]; 356 size_t data_len = 2 * ETH_ALEN + 2 * WPA_NONCE_LEN; 357 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + 358 WPA_KDK_MAX_LEN]; 359 size_t ptk_len; 360 #ifdef CONFIG_OWE 361 int owe_ptk_workaround = 0; 362 363 if (akmp == (WPA_KEY_MGMT_OWE | WPA_KEY_MGMT_PSK_SHA256)) { 364 owe_ptk_workaround = 1; 365 akmp = WPA_KEY_MGMT_OWE; 366 } 367 #endif /* CONFIG_OWE */ 368 369 if (pmk_len == 0) { 370 wpa_printf(MSG_ERROR, "WPA: No PMK set for PTK derivation"); 371 return -1; 372 } 373 374 if (z_len > MAX_Z_LEN) 375 return -1; 376 377 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) { 378 os_memcpy(data, addr1, ETH_ALEN); 379 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN); 380 } else { 381 os_memcpy(data, addr2, ETH_ALEN); 382 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN); 383 } 384 385 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) { 386 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN); 387 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2, 388 WPA_NONCE_LEN); 389 } else { 390 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN); 391 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1, 392 WPA_NONCE_LEN); 393 } 394 395 if (z && z_len) { 396 os_memcpy(data + 2 * ETH_ALEN + 2 * WPA_NONCE_LEN, z, z_len); 397 data_len += z_len; 398 } 399 400 if (kdk_len > WPA_KDK_MAX_LEN) { 401 wpa_printf(MSG_ERROR, 402 "WPA: KDK len=%zu exceeds max supported len", 403 kdk_len); 404 return -1; 405 } 406 407 ptk->kck_len = wpa_kck_len(akmp, pmk_len); 408 ptk->kek_len = wpa_kek_len(akmp, pmk_len); 409 ptk->tk_len = wpa_cipher_key_len(cipher); 410 ptk->kdk_len = kdk_len; 411 if (ptk->tk_len == 0) { 412 wpa_printf(MSG_ERROR, 413 "WPA: Unsupported cipher (0x%x) used in PTK derivation", 414 cipher); 415 return -1; 416 } 417 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + ptk->kdk_len; 418 419 if (wpa_key_mgmt_sha384(akmp)) { 420 #if defined(CONFIG_SUITEB192) || defined(CONFIG_FILS) 421 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); 422 if (sha384_prf(pmk, pmk_len, label, data, data_len, 423 tmp, ptk_len) < 0) 424 return -1; 425 #else /* CONFIG_SUITEB192 || CONFIG_FILS */ 426 return -1; 427 #endif /* CONFIG_SUITEB192 || CONFIG_FILS */ 428 } else if (wpa_key_mgmt_sha256(akmp)) { 429 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); 430 if (sha256_prf(pmk, pmk_len, label, data, data_len, 431 tmp, ptk_len) < 0) 432 return -1; 433 #ifdef CONFIG_OWE 434 } else if (akmp == WPA_KEY_MGMT_OWE && (pmk_len == 32 || 435 owe_ptk_workaround)) { 436 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); 437 if (sha256_prf(pmk, pmk_len, label, data, data_len, 438 tmp, ptk_len) < 0) 439 return -1; 440 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 48) { 441 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); 442 if (sha384_prf(pmk, pmk_len, label, data, data_len, 443 tmp, ptk_len) < 0) 444 return -1; 445 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 64) { 446 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)"); 447 if (sha512_prf(pmk, pmk_len, label, data, data_len, 448 tmp, ptk_len) < 0) 449 return -1; 450 } else if (akmp == WPA_KEY_MGMT_OWE) { 451 wpa_printf(MSG_INFO, "OWE: Unknown PMK length %u", 452 (unsigned int) pmk_len); 453 return -1; 454 #endif /* CONFIG_OWE */ 455 #ifdef CONFIG_DPP 456 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 32) { 457 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); 458 if (sha256_prf(pmk, pmk_len, label, data, data_len, 459 tmp, ptk_len) < 0) 460 return -1; 461 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 48) { 462 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); 463 if (sha384_prf(pmk, pmk_len, label, data, data_len, 464 tmp, ptk_len) < 0) 465 return -1; 466 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 64) { 467 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)"); 468 if (sha512_prf(pmk, pmk_len, label, data, data_len, 469 tmp, ptk_len) < 0) 470 return -1; 471 } else if (akmp == WPA_KEY_MGMT_DPP) { 472 wpa_printf(MSG_INFO, "DPP: Unknown PMK length %u", 473 (unsigned int) pmk_len); 474 return -1; 475 #endif /* CONFIG_DPP */ 476 } else { 477 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA1)"); 478 if (sha1_prf(pmk, pmk_len, label, data, data_len, tmp, 479 ptk_len) < 0) 480 return -1; 481 } 482 483 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR, 484 MAC2STR(addr1), MAC2STR(addr2)); 485 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN); 486 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN); 487 if (z && z_len) 488 wpa_hexdump_key(MSG_DEBUG, "WPA: Z.x", z, z_len); 489 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len); 490 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len); 491 492 os_memcpy(ptk->kck, tmp, ptk->kck_len); 493 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len); 494 495 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len); 496 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); 497 498 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len); 499 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len); 500 501 if (kdk_len) { 502 os_memcpy(ptk->kdk, tmp + ptk->kck_len + ptk->kek_len + 503 ptk->tk_len, ptk->kdk_len); 504 wpa_hexdump_key(MSG_DEBUG, "WPA: KDK", ptk->kdk, ptk->kdk_len); 505 } 506 507 ptk->kek2_len = 0; 508 ptk->kck2_len = 0; 509 510 os_memset(tmp, 0, sizeof(tmp)); 511 os_memset(data, 0, data_len); 512 return 0; 513 } 514 515 #ifdef CONFIG_FILS 516 517 int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len, 518 const u8 *snonce, const u8 *anonce, const u8 *dh_ss, 519 size_t dh_ss_len, u8 *pmk, size_t *pmk_len) 520 { 521 u8 nonces[2 * FILS_NONCE_LEN]; 522 const u8 *addr[2]; 523 size_t len[2]; 524 size_t num_elem; 525 int res; 526 527 /* PMK = HMAC-Hash(SNonce || ANonce, rMSK [ || DHss ]) */ 528 wpa_printf(MSG_DEBUG, "FILS: rMSK to PMK derivation"); 529 530 if (wpa_key_mgmt_sha384(akmp)) 531 *pmk_len = SHA384_MAC_LEN; 532 else if (wpa_key_mgmt_sha256(akmp)) 533 *pmk_len = SHA256_MAC_LEN; 534 else 535 return -1; 536 537 wpa_hexdump_key(MSG_DEBUG, "FILS: rMSK", rmsk, rmsk_len); 538 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); 539 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); 540 wpa_hexdump(MSG_DEBUG, "FILS: DHss", dh_ss, dh_ss_len); 541 542 os_memcpy(nonces, snonce, FILS_NONCE_LEN); 543 os_memcpy(&nonces[FILS_NONCE_LEN], anonce, FILS_NONCE_LEN); 544 addr[0] = rmsk; 545 len[0] = rmsk_len; 546 num_elem = 1; 547 if (dh_ss) { 548 addr[1] = dh_ss; 549 len[1] = dh_ss_len; 550 num_elem++; 551 } 552 if (wpa_key_mgmt_sha384(akmp)) 553 res = hmac_sha384_vector(nonces, 2 * FILS_NONCE_LEN, num_elem, 554 addr, len, pmk); 555 else 556 res = hmac_sha256_vector(nonces, 2 * FILS_NONCE_LEN, num_elem, 557 addr, len, pmk); 558 if (res == 0) 559 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, *pmk_len); 560 else 561 *pmk_len = 0; 562 return res; 563 } 564 565 566 int fils_pmkid_erp(int akmp, const u8 *reauth, size_t reauth_len, 567 u8 *pmkid) 568 { 569 const u8 *addr[1]; 570 size_t len[1]; 571 u8 hash[SHA384_MAC_LEN]; 572 int res; 573 574 /* PMKID = Truncate-128(Hash(EAP-Initiate/Reauth)) */ 575 addr[0] = reauth; 576 len[0] = reauth_len; 577 if (wpa_key_mgmt_sha384(akmp)) 578 res = sha384_vector(1, addr, len, hash); 579 else if (wpa_key_mgmt_sha256(akmp)) 580 res = sha256_vector(1, addr, len, hash); 581 else 582 return -1; 583 if (res) 584 return res; 585 os_memcpy(pmkid, hash, PMKID_LEN); 586 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN); 587 return 0; 588 } 589 590 591 int fils_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const u8 *spa, const u8 *aa, 592 const u8 *snonce, const u8 *anonce, const u8 *dhss, 593 size_t dhss_len, struct wpa_ptk *ptk, 594 u8 *ick, size_t *ick_len, int akmp, int cipher, 595 u8 *fils_ft, size_t *fils_ft_len, size_t kdk_len) 596 { 597 u8 *data, *pos; 598 size_t data_len; 599 u8 tmp[FILS_ICK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + 600 FILS_FT_MAX_LEN + WPA_KDK_MAX_LEN]; 601 size_t key_data_len; 602 const char *label = "FILS PTK Derivation"; 603 int ret = -1; 604 size_t offset; 605 606 /* 607 * FILS-Key-Data = PRF-X(PMK, "FILS PTK Derivation", 608 * SPA || AA || SNonce || ANonce [ || DHss ]) 609 * ICK = L(FILS-Key-Data, 0, ICK_bits) 610 * KEK = L(FILS-Key-Data, ICK_bits, KEK_bits) 611 * TK = L(FILS-Key-Data, ICK_bits + KEK_bits, TK_bits) 612 * If doing FT initial mobility domain association: 613 * FILS-FT = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits, 614 * FILS-FT_bits) 615 * When a KDK is derived: 616 * KDK = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits + FILS-FT_bits, 617 * KDK_bits) 618 */ 619 data_len = 2 * ETH_ALEN + 2 * FILS_NONCE_LEN + dhss_len; 620 data = os_malloc(data_len); 621 if (!data) 622 goto err; 623 pos = data; 624 os_memcpy(pos, spa, ETH_ALEN); 625 pos += ETH_ALEN; 626 os_memcpy(pos, aa, ETH_ALEN); 627 pos += ETH_ALEN; 628 os_memcpy(pos, snonce, FILS_NONCE_LEN); 629 pos += FILS_NONCE_LEN; 630 os_memcpy(pos, anonce, FILS_NONCE_LEN); 631 pos += FILS_NONCE_LEN; 632 if (dhss) 633 os_memcpy(pos, dhss, dhss_len); 634 635 ptk->kck_len = 0; 636 ptk->kek_len = wpa_kek_len(akmp, pmk_len); 637 ptk->tk_len = wpa_cipher_key_len(cipher); 638 if (wpa_key_mgmt_sha384(akmp)) 639 *ick_len = 48; 640 else if (wpa_key_mgmt_sha256(akmp)) 641 *ick_len = 32; 642 else 643 goto err; 644 key_data_len = *ick_len + ptk->kek_len + ptk->tk_len; 645 646 if (kdk_len) { 647 if (kdk_len > WPA_KDK_MAX_LEN) { 648 wpa_printf(MSG_ERROR, "FILS: KDK len=%zu too big", 649 kdk_len); 650 goto err; 651 } 652 653 ptk->kdk_len = kdk_len; 654 key_data_len += kdk_len; 655 } else { 656 ptk->kdk_len = 0; 657 } 658 659 if (fils_ft && fils_ft_len) { 660 if (akmp == WPA_KEY_MGMT_FT_FILS_SHA256) { 661 *fils_ft_len = 32; 662 } else if (akmp == WPA_KEY_MGMT_FT_FILS_SHA384) { 663 *fils_ft_len = 48; 664 } else { 665 *fils_ft_len = 0; 666 fils_ft = NULL; 667 } 668 key_data_len += *fils_ft_len; 669 } 670 671 if (wpa_key_mgmt_sha384(akmp)) { 672 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA384)"); 673 if (sha384_prf(pmk, pmk_len, label, data, data_len, 674 tmp, key_data_len) < 0) 675 goto err; 676 } else { 677 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA256)"); 678 if (sha256_prf(pmk, pmk_len, label, data, data_len, 679 tmp, key_data_len) < 0) 680 goto err; 681 } 682 683 wpa_printf(MSG_DEBUG, "FILS: PTK derivation - SPA=" MACSTR 684 " AA=" MACSTR, MAC2STR(spa), MAC2STR(aa)); 685 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); 686 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); 687 if (dhss) 688 wpa_hexdump_key(MSG_DEBUG, "FILS: DHss", dhss, dhss_len); 689 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, pmk_len); 690 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-Key-Data", tmp, key_data_len); 691 692 os_memcpy(ick, tmp, *ick_len); 693 offset = *ick_len; 694 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, *ick_len); 695 696 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len); 697 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK", ptk->kek, ptk->kek_len); 698 offset += ptk->kek_len; 699 700 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len); 701 wpa_hexdump_key(MSG_DEBUG, "FILS: TK", ptk->tk, ptk->tk_len); 702 offset += ptk->tk_len; 703 704 if (fils_ft && fils_ft_len) { 705 os_memcpy(fils_ft, tmp + offset, *fils_ft_len); 706 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-FT", 707 fils_ft, *fils_ft_len); 708 offset += *fils_ft_len; 709 } 710 711 if (ptk->kdk_len) { 712 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len); 713 wpa_hexdump_key(MSG_DEBUG, "FILS: KDK", ptk->kdk, ptk->kdk_len); 714 } 715 716 ptk->kek2_len = 0; 717 ptk->kck2_len = 0; 718 719 os_memset(tmp, 0, sizeof(tmp)); 720 ret = 0; 721 err: 722 bin_clear_free(data, data_len); 723 return ret; 724 } 725 726 727 int fils_key_auth_sk(const u8 *ick, size_t ick_len, const u8 *snonce, 728 const u8 *anonce, const u8 *sta_addr, const u8 *bssid, 729 const u8 *g_sta, size_t g_sta_len, 730 const u8 *g_ap, size_t g_ap_len, 731 int akmp, u8 *key_auth_sta, u8 *key_auth_ap, 732 size_t *key_auth_len) 733 { 734 const u8 *addr[6]; 735 size_t len[6]; 736 size_t num_elem = 4; 737 int res; 738 739 wpa_printf(MSG_DEBUG, "FILS: Key-Auth derivation: STA-MAC=" MACSTR 740 " AP-BSSID=" MACSTR, MAC2STR(sta_addr), MAC2STR(bssid)); 741 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, ick_len); 742 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); 743 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); 744 wpa_hexdump(MSG_DEBUG, "FILS: gSTA", g_sta, g_sta_len); 745 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len); 746 747 /* 748 * For (Re)Association Request frame (STA->AP): 749 * Key-Auth = HMAC-Hash(ICK, SNonce || ANonce || STA-MAC || AP-BSSID 750 * [ || gSTA || gAP ]) 751 */ 752 addr[0] = snonce; 753 len[0] = FILS_NONCE_LEN; 754 addr[1] = anonce; 755 len[1] = FILS_NONCE_LEN; 756 addr[2] = sta_addr; 757 len[2] = ETH_ALEN; 758 addr[3] = bssid; 759 len[3] = ETH_ALEN; 760 if (g_sta && g_sta_len && g_ap && g_ap_len) { 761 addr[4] = g_sta; 762 len[4] = g_sta_len; 763 addr[5] = g_ap; 764 len[5] = g_ap_len; 765 num_elem = 6; 766 } 767 768 if (wpa_key_mgmt_sha384(akmp)) { 769 *key_auth_len = 48; 770 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len, 771 key_auth_sta); 772 } else if (wpa_key_mgmt_sha256(akmp)) { 773 *key_auth_len = 32; 774 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len, 775 key_auth_sta); 776 } else { 777 return -1; 778 } 779 if (res < 0) 780 return res; 781 782 /* 783 * For (Re)Association Response frame (AP->STA): 784 * Key-Auth = HMAC-Hash(ICK, ANonce || SNonce || AP-BSSID || STA-MAC 785 * [ || gAP || gSTA ]) 786 */ 787 addr[0] = anonce; 788 addr[1] = snonce; 789 addr[2] = bssid; 790 addr[3] = sta_addr; 791 if (g_sta && g_sta_len && g_ap && g_ap_len) { 792 addr[4] = g_ap; 793 len[4] = g_ap_len; 794 addr[5] = g_sta; 795 len[5] = g_sta_len; 796 } 797 798 if (wpa_key_mgmt_sha384(akmp)) 799 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len, 800 key_auth_ap); 801 else if (wpa_key_mgmt_sha256(akmp)) 802 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len, 803 key_auth_ap); 804 if (res < 0) 805 return res; 806 807 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (STA)", 808 key_auth_sta, *key_auth_len); 809 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (AP)", 810 key_auth_ap, *key_auth_len); 811 812 return 0; 813 } 814 815 #endif /* CONFIG_FILS */ 816 817 818 #ifdef CONFIG_IEEE80211R 819 int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr, 820 const u8 *ap_addr, u8 transaction_seqnum, 821 const u8 *mdie, size_t mdie_len, 822 const u8 *ftie, size_t ftie_len, 823 const u8 *rsnie, size_t rsnie_len, 824 const u8 *ric, size_t ric_len, 825 const u8 *rsnxe, size_t rsnxe_len, 826 u8 *mic) 827 { 828 const u8 *addr[10]; 829 size_t len[10]; 830 size_t i, num_elem = 0; 831 u8 zero_mic[24]; 832 size_t mic_len, fte_fixed_len; 833 834 if (kck_len == 16) { 835 mic_len = 16; 836 #ifdef CONFIG_SHA384 837 } else if (kck_len == 24) { 838 mic_len = 24; 839 #endif /* CONFIG_SHA384 */ 840 } else { 841 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u", 842 (unsigned int) kck_len); 843 return -1; 844 } 845 846 fte_fixed_len = sizeof(struct rsn_ftie) - 16 + mic_len; 847 848 addr[num_elem] = sta_addr; 849 len[num_elem] = ETH_ALEN; 850 num_elem++; 851 852 addr[num_elem] = ap_addr; 853 len[num_elem] = ETH_ALEN; 854 num_elem++; 855 856 addr[num_elem] = &transaction_seqnum; 857 len[num_elem] = 1; 858 num_elem++; 859 860 if (rsnie) { 861 addr[num_elem] = rsnie; 862 len[num_elem] = rsnie_len; 863 num_elem++; 864 } 865 if (mdie) { 866 addr[num_elem] = mdie; 867 len[num_elem] = mdie_len; 868 num_elem++; 869 } 870 if (ftie) { 871 if (ftie_len < 2 + fte_fixed_len) 872 return -1; 873 874 /* IE hdr and mic_control */ 875 addr[num_elem] = ftie; 876 len[num_elem] = 2 + 2; 877 num_elem++; 878 879 /* MIC field with all zeros */ 880 os_memset(zero_mic, 0, mic_len); 881 addr[num_elem] = zero_mic; 882 len[num_elem] = mic_len; 883 num_elem++; 884 885 /* Rest of FTIE */ 886 addr[num_elem] = ftie + 2 + 2 + mic_len; 887 len[num_elem] = ftie_len - (2 + 2 + mic_len); 888 num_elem++; 889 } 890 if (ric) { 891 addr[num_elem] = ric; 892 len[num_elem] = ric_len; 893 num_elem++; 894 } 895 896 if (rsnxe) { 897 addr[num_elem] = rsnxe; 898 len[num_elem] = rsnxe_len; 899 num_elem++; 900 } 901 902 for (i = 0; i < num_elem; i++) 903 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]); 904 #ifdef CONFIG_SHA384 905 if (kck_len == 24) { 906 u8 hash[SHA384_MAC_LEN]; 907 908 if (hmac_sha384_vector(kck, kck_len, num_elem, addr, len, hash)) 909 return -1; 910 os_memcpy(mic, hash, 24); 911 } 912 #endif /* CONFIG_SHA384 */ 913 if (kck_len == 16 && 914 omac1_aes_128_vector(kck, num_elem, addr, len, mic)) 915 return -1; 916 917 return 0; 918 } 919 920 921 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len, 922 struct wpa_ft_ies *parse, int use_sha384) 923 { 924 const u8 *end, *pos; 925 926 parse->ftie = ie; 927 parse->ftie_len = ie_len; 928 929 pos = ie + (use_sha384 ? sizeof(struct rsn_ftie_sha384) : 930 sizeof(struct rsn_ftie)); 931 end = ie + ie_len; 932 wpa_hexdump(MSG_DEBUG, "FT: Parse FTE subelements", pos, end - pos); 933 934 while (end - pos >= 2) { 935 u8 id, len; 936 937 id = *pos++; 938 len = *pos++; 939 if (len > end - pos) { 940 wpa_printf(MSG_DEBUG, "FT: Truncated subelement"); 941 break; 942 } 943 944 switch (id) { 945 case FTIE_SUBELEM_R1KH_ID: 946 if (len != FT_R1KH_ID_LEN) { 947 wpa_printf(MSG_DEBUG, 948 "FT: Invalid R1KH-ID length in FTIE: %d", 949 len); 950 return -1; 951 } 952 parse->r1kh_id = pos; 953 break; 954 case FTIE_SUBELEM_GTK: 955 parse->gtk = pos; 956 parse->gtk_len = len; 957 break; 958 case FTIE_SUBELEM_R0KH_ID: 959 if (len < 1 || len > FT_R0KH_ID_MAX_LEN) { 960 wpa_printf(MSG_DEBUG, 961 "FT: Invalid R0KH-ID length in FTIE: %d", 962 len); 963 return -1; 964 } 965 parse->r0kh_id = pos; 966 parse->r0kh_id_len = len; 967 break; 968 case FTIE_SUBELEM_IGTK: 969 parse->igtk = pos; 970 parse->igtk_len = len; 971 break; 972 #ifdef CONFIG_OCV 973 case FTIE_SUBELEM_OCI: 974 parse->oci = pos; 975 parse->oci_len = len; 976 break; 977 #endif /* CONFIG_OCV */ 978 case FTIE_SUBELEM_BIGTK: 979 parse->bigtk = pos; 980 parse->bigtk_len = len; 981 break; 982 default: 983 wpa_printf(MSG_DEBUG, "FT: Unknown subelem id %u", id); 984 break; 985 } 986 987 pos += len; 988 } 989 990 return 0; 991 } 992 993 994 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, 995 struct wpa_ft_ies *parse, int use_sha384) 996 { 997 const u8 *end, *pos; 998 struct wpa_ie_data data; 999 int ret; 1000 const struct rsn_ftie *ftie; 1001 int prot_ie_count = 0; 1002 int update_use_sha384 = 0; 1003 1004 if (use_sha384 < 0) { 1005 use_sha384 = 0; 1006 update_use_sha384 = 1; 1007 } 1008 1009 os_memset(parse, 0, sizeof(*parse)); 1010 if (ies == NULL) 1011 return 0; 1012 1013 pos = ies; 1014 end = ies + ies_len; 1015 while (end - pos >= 2) { 1016 u8 id, len; 1017 1018 id = *pos++; 1019 len = *pos++; 1020 if (len > end - pos) 1021 break; 1022 1023 switch (id) { 1024 case WLAN_EID_RSN: 1025 wpa_hexdump(MSG_DEBUG, "FT: RSNE", pos, len); 1026 parse->rsn = pos; 1027 parse->rsn_len = len; 1028 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2, 1029 parse->rsn_len + 2, 1030 &data); 1031 if (ret < 0) { 1032 wpa_printf(MSG_DEBUG, "FT: Failed to parse " 1033 "RSN IE: %d", ret); 1034 return -1; 1035 } 1036 parse->rsn_capab = data.capabilities; 1037 if (data.num_pmkid == 1 && data.pmkid) 1038 parse->rsn_pmkid = data.pmkid; 1039 parse->key_mgmt = data.key_mgmt; 1040 parse->pairwise_cipher = data.pairwise_cipher; 1041 if (update_use_sha384) { 1042 use_sha384 = 1043 wpa_key_mgmt_sha384(parse->key_mgmt); 1044 update_use_sha384 = 0; 1045 } 1046 break; 1047 case WLAN_EID_RSNX: 1048 wpa_hexdump(MSG_DEBUG, "FT: RSNXE", pos, len); 1049 if (len < 1) 1050 break; 1051 parse->rsnxe = pos; 1052 parse->rsnxe_len = len; 1053 break; 1054 case WLAN_EID_MOBILITY_DOMAIN: 1055 wpa_hexdump(MSG_DEBUG, "FT: MDE", pos, len); 1056 if (len < sizeof(struct rsn_mdie)) 1057 return -1; 1058 parse->mdie = pos; 1059 parse->mdie_len = len; 1060 break; 1061 case WLAN_EID_FAST_BSS_TRANSITION: 1062 wpa_hexdump(MSG_DEBUG, "FT: FTE", pos, len); 1063 if (use_sha384) { 1064 const struct rsn_ftie_sha384 *ftie_sha384; 1065 1066 if (len < sizeof(*ftie_sha384)) 1067 return -1; 1068 ftie_sha384 = 1069 (const struct rsn_ftie_sha384 *) pos; 1070 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control", 1071 ftie_sha384->mic_control, 2); 1072 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC", 1073 ftie_sha384->mic, 1074 sizeof(ftie_sha384->mic)); 1075 parse->fte_anonce = ftie_sha384->anonce; 1076 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce", 1077 ftie_sha384->anonce, 1078 WPA_NONCE_LEN); 1079 parse->fte_snonce = ftie_sha384->snonce; 1080 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce", 1081 ftie_sha384->snonce, 1082 WPA_NONCE_LEN); 1083 prot_ie_count = ftie_sha384->mic_control[1]; 1084 if (wpa_ft_parse_ftie(pos, len, parse, 1) < 0) 1085 return -1; 1086 break; 1087 } 1088 1089 if (len < sizeof(*ftie)) 1090 return -1; 1091 ftie = (const struct rsn_ftie *) pos; 1092 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control", 1093 ftie->mic_control, 2); 1094 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC", 1095 ftie->mic, sizeof(ftie->mic)); 1096 parse->fte_anonce = ftie->anonce; 1097 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce", 1098 ftie->anonce, WPA_NONCE_LEN); 1099 parse->fte_snonce = ftie->snonce; 1100 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce", 1101 ftie->snonce, WPA_NONCE_LEN); 1102 prot_ie_count = ftie->mic_control[1]; 1103 if (wpa_ft_parse_ftie(pos, len, parse, 0) < 0) 1104 return -1; 1105 break; 1106 case WLAN_EID_TIMEOUT_INTERVAL: 1107 wpa_hexdump(MSG_DEBUG, "FT: Timeout Interval", 1108 pos, len); 1109 if (len != 5) 1110 break; 1111 parse->tie = pos; 1112 parse->tie_len = len; 1113 break; 1114 case WLAN_EID_RIC_DATA: 1115 if (parse->ric == NULL) 1116 parse->ric = pos - 2; 1117 break; 1118 } 1119 1120 pos += len; 1121 } 1122 1123 if (prot_ie_count == 0) 1124 return 0; /* no MIC */ 1125 1126 /* 1127 * Check that the protected IE count matches with IEs included in the 1128 * frame. 1129 */ 1130 if (parse->rsn) 1131 prot_ie_count--; 1132 if (parse->mdie) 1133 prot_ie_count--; 1134 if (parse->ftie) 1135 prot_ie_count--; 1136 if (parse->rsnxe) 1137 prot_ie_count--; 1138 if (prot_ie_count < 0) { 1139 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in " 1140 "the protected IE count"); 1141 return -1; 1142 } 1143 1144 if (prot_ie_count == 0 && parse->ric) { 1145 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not " 1146 "included in protected IE count"); 1147 return -1; 1148 } 1149 1150 /* Determine the end of the RIC IE(s) */ 1151 if (parse->ric) { 1152 pos = parse->ric; 1153 while (end - pos >= 2 && 2 + pos[1] <= end - pos && 1154 prot_ie_count) { 1155 prot_ie_count--; 1156 pos += 2 + pos[1]; 1157 } 1158 parse->ric_len = pos - parse->ric; 1159 } 1160 if (prot_ie_count) { 1161 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from " 1162 "frame", (int) prot_ie_count); 1163 return -1; 1164 } 1165 1166 return 0; 1167 } 1168 #endif /* CONFIG_IEEE80211R */ 1169 1170 1171 #ifdef CONFIG_PASN 1172 1173 /* 1174 * pasn_use_sha384 - Should SHA384 be used or SHA256 1175 * 1176 * @akmp: Authentication and key management protocol 1177 * @cipher: The cipher suite 1178 * 1179 * According to IEEE P802.11az/D2.7, 12.12.7, the hash algorithm to use is the 1180 * hash algorithm defined for the Base AKM (see Table 9-151 (AKM suite 1181 * selectors)). When there is no Base AKM, the hash algorithm is selected based 1182 * on the pairwise cipher suite provided in the RSNE by the AP in the second 1183 * PASN frame. SHA-256 is used as the hash algorithm, except for the ciphers 1184 * 00-0F-AC:9 and 00-0F-AC:10 for which SHA-384 is used. 1185 */ 1186 static bool pasn_use_sha384(int akmp, int cipher) 1187 { 1188 return (akmp == WPA_KEY_MGMT_PASN && (cipher == WPA_CIPHER_CCMP_256 || 1189 cipher == WPA_CIPHER_GCMP_256)) || 1190 wpa_key_mgmt_sha384(akmp); 1191 } 1192 1193 1194 /** 1195 * pasn_pmk_to_ptk - Calculate PASN PTK from PMK, addresses, etc. 1196 * @pmk: Pairwise master key 1197 * @pmk_len: Length of PMK 1198 * @spa: Suppplicant address 1199 * @bssid: AP BSSID 1200 * @dhss: Is the shared secret (DHss) derived from the PASN ephemeral key 1201 * exchange encoded as an octet string 1202 * @dhss_len: The length of dhss in octets 1203 * @ptk: Buffer for pairwise transient key 1204 * @akmp: Negotiated AKM 1205 * @cipher: Negotiated pairwise cipher 1206 * @kdk_len: the length in octets that should be derived for HTLK. Can be zero. 1207 * Returns: 0 on success, -1 on failure 1208 */ 1209 int pasn_pmk_to_ptk(const u8 *pmk, size_t pmk_len, 1210 const u8 *spa, const u8 *bssid, 1211 const u8 *dhss, size_t dhss_len, 1212 struct wpa_ptk *ptk, int akmp, int cipher, 1213 size_t kdk_len) 1214 { 1215 u8 tmp[WPA_KCK_MAX_LEN + WPA_TK_MAX_LEN + WPA_KDK_MAX_LEN]; 1216 u8 *data; 1217 size_t data_len, ptk_len; 1218 int ret = -1; 1219 const char *label = "PASN PTK Derivation"; 1220 1221 if (!pmk || !pmk_len) { 1222 wpa_printf(MSG_ERROR, "PASN: No PMK set for PTK derivation"); 1223 return -1; 1224 } 1225 1226 if (!dhss || !dhss_len) { 1227 wpa_printf(MSG_ERROR, "PASN: No DHss set for PTK derivation"); 1228 return -1; 1229 } 1230 1231 /* 1232 * PASN-PTK = KDF(PMK, “PASN PTK Derivation”, SPA || BSSID || DHss) 1233 * 1234 * KCK = L(PASN-PTK, 0, 256) 1235 * TK = L(PASN-PTK, 256, TK_bits) 1236 * KDK = L(PASN-PTK, 256 + TK_bits, kdk_len * 8) 1237 */ 1238 data_len = 2 * ETH_ALEN + dhss_len; 1239 data = os_zalloc(data_len); 1240 if (!data) 1241 return -1; 1242 1243 os_memcpy(data, spa, ETH_ALEN); 1244 os_memcpy(data + ETH_ALEN, bssid, ETH_ALEN); 1245 os_memcpy(data + 2 * ETH_ALEN, dhss, dhss_len); 1246 1247 ptk->kck_len = WPA_PASN_KCK_LEN; 1248 ptk->tk_len = wpa_cipher_key_len(cipher); 1249 ptk->kdk_len = kdk_len; 1250 ptk->kek_len = 0; 1251 ptk->kek2_len = 0; 1252 ptk->kck2_len = 0; 1253 1254 if (ptk->tk_len == 0) { 1255 wpa_printf(MSG_ERROR, 1256 "PASN: Unsupported cipher (0x%x) used in PTK derivation", 1257 cipher); 1258 goto err; 1259 } 1260 1261 ptk_len = ptk->kck_len + ptk->tk_len + ptk->kdk_len; 1262 if (ptk_len > sizeof(tmp)) 1263 goto err; 1264 1265 if (pasn_use_sha384(akmp, cipher)) { 1266 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA384"); 1267 1268 if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp, 1269 ptk_len) < 0) 1270 goto err; 1271 } else { 1272 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA256"); 1273 1274 if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp, 1275 ptk_len) < 0) 1276 goto err; 1277 } 1278 1279 wpa_printf(MSG_DEBUG, 1280 "PASN: PTK derivation: SPA=" MACSTR " BSSID=" MACSTR, 1281 MAC2STR(spa), MAC2STR(bssid)); 1282 1283 wpa_hexdump_key(MSG_DEBUG, "PASN: DHss", dhss, dhss_len); 1284 wpa_hexdump_key(MSG_DEBUG, "PASN: PMK", pmk, pmk_len); 1285 wpa_hexdump_key(MSG_DEBUG, "PASN: PASN-PTK", tmp, ptk_len); 1286 1287 os_memcpy(ptk->kck, tmp, WPA_PASN_KCK_LEN); 1288 wpa_hexdump_key(MSG_DEBUG, "PASN: KCK:", ptk->kck, WPA_PASN_KCK_LEN); 1289 1290 os_memcpy(ptk->tk, tmp + WPA_PASN_KCK_LEN, ptk->tk_len); 1291 wpa_hexdump_key(MSG_DEBUG, "PASN: TK:", ptk->tk, ptk->tk_len); 1292 1293 if (kdk_len) { 1294 os_memcpy(ptk->kdk, tmp + WPA_PASN_KCK_LEN + ptk->tk_len, 1295 ptk->kdk_len); 1296 wpa_hexdump_key(MSG_DEBUG, "PASN: KDK:", 1297 ptk->kdk, ptk->kdk_len); 1298 } 1299 1300 forced_memzero(tmp, sizeof(tmp)); 1301 ret = 0; 1302 err: 1303 bin_clear_free(data, data_len); 1304 return ret; 1305 } 1306 1307 1308 /* 1309 * pasn_mic_len - Returns the MIC length for PASN authentication 1310 */ 1311 u8 pasn_mic_len(int akmp, int cipher) 1312 { 1313 if (pasn_use_sha384(akmp, cipher)) 1314 return 24; 1315 1316 return 16; 1317 } 1318 1319 1320 /** 1321 * pasn_mic - Calculate PASN MIC 1322 * @kck: The key confirmation key for the PASN PTKSA 1323 * @akmp: Negotiated AKM 1324 * @cipher: Negotiated pairwise cipher 1325 * @addr1: For the 2nd PASN frame supplicant address; for the 3rd frame the 1326 * BSSID 1327 * @addr2: For the 2nd PASN frame the BSSID; for the 3rd frame the supplicant 1328 * address 1329 * @data: For calculating the MIC for the 2nd PASN frame, this should hold the 1330 * Beacon frame RSNE + RSNXE. For calculating the MIC for the 3rd PASN 1331 * frame, this should hold the hash of the body of the PASN 1st frame. 1332 * @data_len: The length of data 1333 * @frame: The body of the PASN frame including the MIC element with the octets 1334 * in the MIC field of the MIC element set to 0. 1335 * @frame_len: The length of frame 1336 * @mic: Buffer to hold the MIC on success. Should be big enough to handle the 1337 * maximal MIC length 1338 * Returns: 0 on success, -1 on failure 1339 */ 1340 int pasn_mic(const u8 *kck, int akmp, int cipher, 1341 const u8 *addr1, const u8 *addr2, 1342 const u8 *data, size_t data_len, 1343 const u8 *frame, size_t frame_len, u8 *mic) 1344 { 1345 u8 *buf; 1346 u8 hash[SHA384_MAC_LEN]; 1347 size_t buf_len = 2 * ETH_ALEN + data_len + frame_len; 1348 int ret = -1; 1349 1350 if (!kck) { 1351 wpa_printf(MSG_ERROR, "PASN: No KCK for MIC calculation"); 1352 return -1; 1353 } 1354 1355 if (!data || !data_len) { 1356 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation"); 1357 return -1; 1358 } 1359 1360 if (!frame || !frame_len) { 1361 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation"); 1362 return -1; 1363 } 1364 1365 buf = os_zalloc(buf_len); 1366 if (!buf) 1367 return -1; 1368 1369 os_memcpy(buf, addr1, ETH_ALEN); 1370 os_memcpy(buf + ETH_ALEN, addr2, ETH_ALEN); 1371 1372 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: data", data, data_len); 1373 os_memcpy(buf + 2 * ETH_ALEN, data, data_len); 1374 1375 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: frame", frame, frame_len); 1376 os_memcpy(buf + 2 * ETH_ALEN + data_len, frame, frame_len); 1377 1378 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: KCK", kck, WPA_PASN_KCK_LEN); 1379 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: buf", buf, buf_len); 1380 1381 if (pasn_use_sha384(akmp, cipher)) { 1382 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA384"); 1383 1384 if (hmac_sha384(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash)) 1385 goto err; 1386 1387 os_memcpy(mic, hash, 24); 1388 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 24); 1389 } else { 1390 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA256"); 1391 1392 if (hmac_sha256(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash)) 1393 goto err; 1394 1395 os_memcpy(mic, hash, 16); 1396 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 16); 1397 } 1398 1399 ret = 0; 1400 err: 1401 bin_clear_free(buf, buf_len); 1402 return ret; 1403 } 1404 1405 1406 /** 1407 * pasn_auth_frame_hash - Computes a hash of an Authentication frame body 1408 * @akmp: Negotiated AKM 1409 * @cipher: Negotiated pairwise cipher 1410 * @data: Pointer to the Authentication frame body 1411 * @len: Length of the Authentication frame body 1412 * @hash: On return would hold the computed hash. Should be big enough to handle 1413 * SHA384. 1414 * Returns: 0 on success, -1 on failure 1415 */ 1416 int pasn_auth_frame_hash(int akmp, int cipher, const u8 *data, size_t len, 1417 u8 *hash) 1418 { 1419 if (pasn_use_sha384(akmp, cipher)) { 1420 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-384"); 1421 return sha384_vector(1, &data, &len, hash); 1422 } else { 1423 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-256"); 1424 return sha256_vector(1, &data, &len, hash); 1425 } 1426 } 1427 1428 #endif /* CONFIG_PASN */ 1429 1430 1431 static int rsn_selector_to_bitfield(const u8 *s) 1432 { 1433 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE) 1434 return WPA_CIPHER_NONE; 1435 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP) 1436 return WPA_CIPHER_TKIP; 1437 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP) 1438 return WPA_CIPHER_CCMP; 1439 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC) 1440 return WPA_CIPHER_AES_128_CMAC; 1441 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP) 1442 return WPA_CIPHER_GCMP; 1443 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256) 1444 return WPA_CIPHER_CCMP_256; 1445 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256) 1446 return WPA_CIPHER_GCMP_256; 1447 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128) 1448 return WPA_CIPHER_BIP_GMAC_128; 1449 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256) 1450 return WPA_CIPHER_BIP_GMAC_256; 1451 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256) 1452 return WPA_CIPHER_BIP_CMAC_256; 1453 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED) 1454 return WPA_CIPHER_GTK_NOT_USED; 1455 return 0; 1456 } 1457 1458 1459 static int rsn_key_mgmt_to_bitfield(const u8 *s) 1460 { 1461 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X) 1462 return WPA_KEY_MGMT_IEEE8021X; 1463 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X) 1464 return WPA_KEY_MGMT_PSK; 1465 #ifdef CONFIG_IEEE80211R 1466 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X) 1467 return WPA_KEY_MGMT_FT_IEEE8021X; 1468 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK) 1469 return WPA_KEY_MGMT_FT_PSK; 1470 #ifdef CONFIG_SHA384 1471 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384) 1472 return WPA_KEY_MGMT_FT_IEEE8021X_SHA384; 1473 #endif /* CONFIG_SHA384 */ 1474 #endif /* CONFIG_IEEE80211R */ 1475 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256) 1476 return WPA_KEY_MGMT_IEEE8021X_SHA256; 1477 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256) 1478 return WPA_KEY_MGMT_PSK_SHA256; 1479 #ifdef CONFIG_SAE 1480 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE) 1481 return WPA_KEY_MGMT_SAE; 1482 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE) 1483 return WPA_KEY_MGMT_FT_SAE; 1484 #endif /* CONFIG_SAE */ 1485 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B) 1486 return WPA_KEY_MGMT_IEEE8021X_SUITE_B; 1487 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192) 1488 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192; 1489 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA256) 1490 return WPA_KEY_MGMT_FILS_SHA256; 1491 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA384) 1492 return WPA_KEY_MGMT_FILS_SHA384; 1493 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA256) 1494 return WPA_KEY_MGMT_FT_FILS_SHA256; 1495 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA384) 1496 return WPA_KEY_MGMT_FT_FILS_SHA384; 1497 #ifdef CONFIG_OWE 1498 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OWE) 1499 return WPA_KEY_MGMT_OWE; 1500 #endif /* CONFIG_OWE */ 1501 #ifdef CONFIG_DPP 1502 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_DPP) 1503 return WPA_KEY_MGMT_DPP; 1504 #endif /* CONFIG_DPP */ 1505 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN) 1506 return WPA_KEY_MGMT_OSEN; 1507 #ifdef CONFIG_PASN 1508 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PASN) 1509 return WPA_KEY_MGMT_PASN; 1510 #endif /* CONFIG_PASN */ 1511 return 0; 1512 } 1513 1514 1515 int wpa_cipher_valid_group(int cipher) 1516 { 1517 return wpa_cipher_valid_pairwise(cipher) || 1518 cipher == WPA_CIPHER_GTK_NOT_USED; 1519 } 1520 1521 1522 int wpa_cipher_valid_mgmt_group(int cipher) 1523 { 1524 return cipher == WPA_CIPHER_GTK_NOT_USED || 1525 cipher == WPA_CIPHER_AES_128_CMAC || 1526 cipher == WPA_CIPHER_BIP_GMAC_128 || 1527 cipher == WPA_CIPHER_BIP_GMAC_256 || 1528 cipher == WPA_CIPHER_BIP_CMAC_256; 1529 } 1530 1531 1532 /** 1533 * wpa_parse_wpa_ie_rsn - Parse RSN IE 1534 * @rsn_ie: Buffer containing RSN IE 1535 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets) 1536 * @data: Pointer to structure that will be filled in with parsed data 1537 * Returns: 0 on success, <0 on failure 1538 */ 1539 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len, 1540 struct wpa_ie_data *data) 1541 { 1542 const u8 *pos; 1543 int left; 1544 int i, count; 1545 1546 os_memset(data, 0, sizeof(*data)); 1547 data->proto = WPA_PROTO_RSN; 1548 data->pairwise_cipher = WPA_CIPHER_CCMP; 1549 data->group_cipher = WPA_CIPHER_CCMP; 1550 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 1551 data->capabilities = 0; 1552 data->pmkid = NULL; 1553 data->num_pmkid = 0; 1554 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; 1555 1556 if (rsn_ie_len == 0) { 1557 /* No RSN IE - fail silently */ 1558 return -1; 1559 } 1560 1561 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) { 1562 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", 1563 __func__, (unsigned long) rsn_ie_len); 1564 return -1; 1565 } 1566 1567 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 && 1568 rsn_ie[1] == rsn_ie_len - 2 && 1569 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) { 1570 pos = rsn_ie + 6; 1571 left = rsn_ie_len - 6; 1572 1573 data->group_cipher = WPA_CIPHER_GTK_NOT_USED; 1574 data->has_group = 1; 1575 data->key_mgmt = WPA_KEY_MGMT_OSEN; 1576 data->proto = WPA_PROTO_OSEN; 1577 } else { 1578 const struct rsn_ie_hdr *hdr; 1579 1580 hdr = (const struct rsn_ie_hdr *) rsn_ie; 1581 1582 if (hdr->elem_id != WLAN_EID_RSN || 1583 hdr->len != rsn_ie_len - 2 || 1584 WPA_GET_LE16(hdr->version) != RSN_VERSION) { 1585 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", 1586 __func__); 1587 return -2; 1588 } 1589 1590 pos = (const u8 *) (hdr + 1); 1591 left = rsn_ie_len - sizeof(*hdr); 1592 } 1593 1594 if (left >= RSN_SELECTOR_LEN) { 1595 data->group_cipher = rsn_selector_to_bitfield(pos); 1596 data->has_group = 1; 1597 if (!wpa_cipher_valid_group(data->group_cipher)) { 1598 wpa_printf(MSG_DEBUG, 1599 "%s: invalid group cipher 0x%x (%08x)", 1600 __func__, data->group_cipher, 1601 WPA_GET_BE32(pos)); 1602 return -1; 1603 } 1604 pos += RSN_SELECTOR_LEN; 1605 left -= RSN_SELECTOR_LEN; 1606 } else if (left > 0) { 1607 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", 1608 __func__, left); 1609 return -3; 1610 } 1611 1612 if (left >= 2) { 1613 data->pairwise_cipher = 0; 1614 count = WPA_GET_LE16(pos); 1615 pos += 2; 1616 left -= 2; 1617 if (count == 0 || count > left / RSN_SELECTOR_LEN) { 1618 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " 1619 "count %u left %u", __func__, count, left); 1620 return -4; 1621 } 1622 if (count) 1623 data->has_pairwise = 1; 1624 for (i = 0; i < count; i++) { 1625 data->pairwise_cipher |= rsn_selector_to_bitfield(pos); 1626 pos += RSN_SELECTOR_LEN; 1627 left -= RSN_SELECTOR_LEN; 1628 } 1629 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) { 1630 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as " 1631 "pairwise cipher", __func__); 1632 return -1; 1633 } 1634 } else if (left == 1) { 1635 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", 1636 __func__); 1637 return -5; 1638 } 1639 1640 if (left >= 2) { 1641 data->key_mgmt = 0; 1642 count = WPA_GET_LE16(pos); 1643 pos += 2; 1644 left -= 2; 1645 if (count == 0 || count > left / RSN_SELECTOR_LEN) { 1646 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " 1647 "count %u left %u", __func__, count, left); 1648 return -6; 1649 } 1650 for (i = 0; i < count; i++) { 1651 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos); 1652 pos += RSN_SELECTOR_LEN; 1653 left -= RSN_SELECTOR_LEN; 1654 } 1655 } else if (left == 1) { 1656 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", 1657 __func__); 1658 return -7; 1659 } 1660 1661 if (left >= 2) { 1662 data->capabilities = WPA_GET_LE16(pos); 1663 pos += 2; 1664 left -= 2; 1665 } 1666 1667 if (left >= 2) { 1668 u16 num_pmkid = WPA_GET_LE16(pos); 1669 pos += 2; 1670 left -= 2; 1671 if (num_pmkid > (unsigned int) left / PMKID_LEN) { 1672 wpa_printf(MSG_DEBUG, "%s: PMKID underflow " 1673 "(num_pmkid=%u left=%d)", 1674 __func__, num_pmkid, left); 1675 data->num_pmkid = 0; 1676 return -9; 1677 } else { 1678 data->num_pmkid = num_pmkid; 1679 data->pmkid = pos; 1680 pos += data->num_pmkid * PMKID_LEN; 1681 left -= data->num_pmkid * PMKID_LEN; 1682 } 1683 } 1684 1685 if (left >= 4) { 1686 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos); 1687 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) { 1688 wpa_printf(MSG_DEBUG, 1689 "%s: Unsupported management group cipher 0x%x (%08x)", 1690 __func__, data->mgmt_group_cipher, 1691 WPA_GET_BE32(pos)); 1692 return -10; 1693 } 1694 pos += RSN_SELECTOR_LEN; 1695 left -= RSN_SELECTOR_LEN; 1696 } 1697 1698 if (left > 0) { 1699 wpa_hexdump(MSG_DEBUG, 1700 "wpa_parse_wpa_ie_rsn: ignore trailing bytes", 1701 pos, left); 1702 } 1703 1704 return 0; 1705 } 1706 1707 1708 static int wpa_selector_to_bitfield(const u8 *s) 1709 { 1710 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE) 1711 return WPA_CIPHER_NONE; 1712 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP) 1713 return WPA_CIPHER_TKIP; 1714 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP) 1715 return WPA_CIPHER_CCMP; 1716 return 0; 1717 } 1718 1719 1720 static int wpa_key_mgmt_to_bitfield(const u8 *s) 1721 { 1722 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X) 1723 return WPA_KEY_MGMT_IEEE8021X; 1724 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X) 1725 return WPA_KEY_MGMT_PSK; 1726 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE) 1727 return WPA_KEY_MGMT_WPA_NONE; 1728 return 0; 1729 } 1730 1731 1732 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len, 1733 struct wpa_ie_data *data) 1734 { 1735 const struct wpa_ie_hdr *hdr; 1736 const u8 *pos; 1737 int left; 1738 int i, count; 1739 1740 os_memset(data, 0, sizeof(*data)); 1741 data->proto = WPA_PROTO_WPA; 1742 data->pairwise_cipher = WPA_CIPHER_TKIP; 1743 data->group_cipher = WPA_CIPHER_TKIP; 1744 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 1745 data->capabilities = 0; 1746 data->pmkid = NULL; 1747 data->num_pmkid = 0; 1748 data->mgmt_group_cipher = 0; 1749 1750 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) { 1751 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", 1752 __func__, (unsigned long) wpa_ie_len); 1753 return -1; 1754 } 1755 1756 hdr = (const struct wpa_ie_hdr *) wpa_ie; 1757 1758 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC || 1759 hdr->len != wpa_ie_len - 2 || 1760 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE || 1761 WPA_GET_LE16(hdr->version) != WPA_VERSION) { 1762 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", 1763 __func__); 1764 return -2; 1765 } 1766 1767 pos = (const u8 *) (hdr + 1); 1768 left = wpa_ie_len - sizeof(*hdr); 1769 1770 if (left >= WPA_SELECTOR_LEN) { 1771 data->group_cipher = wpa_selector_to_bitfield(pos); 1772 pos += WPA_SELECTOR_LEN; 1773 left -= WPA_SELECTOR_LEN; 1774 } else if (left > 0) { 1775 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", 1776 __func__, left); 1777 return -3; 1778 } 1779 1780 if (left >= 2) { 1781 data->pairwise_cipher = 0; 1782 count = WPA_GET_LE16(pos); 1783 pos += 2; 1784 left -= 2; 1785 if (count == 0 || count > left / WPA_SELECTOR_LEN) { 1786 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " 1787 "count %u left %u", __func__, count, left); 1788 return -4; 1789 } 1790 for (i = 0; i < count; i++) { 1791 data->pairwise_cipher |= wpa_selector_to_bitfield(pos); 1792 pos += WPA_SELECTOR_LEN; 1793 left -= WPA_SELECTOR_LEN; 1794 } 1795 } else if (left == 1) { 1796 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", 1797 __func__); 1798 return -5; 1799 } 1800 1801 if (left >= 2) { 1802 data->key_mgmt = 0; 1803 count = WPA_GET_LE16(pos); 1804 pos += 2; 1805 left -= 2; 1806 if (count == 0 || count > left / WPA_SELECTOR_LEN) { 1807 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " 1808 "count %u left %u", __func__, count, left); 1809 return -6; 1810 } 1811 for (i = 0; i < count; i++) { 1812 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos); 1813 pos += WPA_SELECTOR_LEN; 1814 left -= WPA_SELECTOR_LEN; 1815 } 1816 } else if (left == 1) { 1817 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", 1818 __func__); 1819 return -7; 1820 } 1821 1822 if (left >= 2) { 1823 data->capabilities = WPA_GET_LE16(pos); 1824 pos += 2; 1825 left -= 2; 1826 } 1827 1828 if (left > 0) { 1829 wpa_hexdump(MSG_DEBUG, 1830 "wpa_parse_wpa_ie_wpa: ignore trailing bytes", 1831 pos, left); 1832 } 1833 1834 return 0; 1835 } 1836 1837 1838 int wpa_default_rsn_cipher(int freq) 1839 { 1840 if (freq > 56160) 1841 return WPA_CIPHER_GCMP; /* DMG */ 1842 1843 return WPA_CIPHER_CCMP; 1844 } 1845 1846 1847 #ifdef CONFIG_IEEE80211R 1848 1849 /** 1850 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name 1851 * 1852 * IEEE Std 802.11r-2008 - 8.5.1.5.3 1853 */ 1854 int wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len, 1855 const u8 *ssid, size_t ssid_len, 1856 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len, 1857 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name, 1858 int use_sha384) 1859 { 1860 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 + 1861 FT_R0KH_ID_MAX_LEN + ETH_ALEN]; 1862 u8 *pos, r0_key_data[64], hash[48]; 1863 const u8 *addr[2]; 1864 size_t len[2]; 1865 size_t q = use_sha384 ? 48 : 32; 1866 size_t r0_key_data_len = q + 16; 1867 1868 /* 1869 * R0-Key-Data = KDF-384(XXKey, "FT-R0", 1870 * SSIDlength || SSID || MDID || R0KHlength || 1871 * R0KH-ID || S0KH-ID) 1872 * XXKey is either the second 256 bits of MSK or PSK; or the first 1873 * 384 bits of MSK for FT-EAP-SHA384. 1874 * PMK-R0 = L(R0-Key-Data, 0, Q) 1875 * PMK-R0Name-Salt = L(R0-Key-Data, Q, 128) 1876 * Q = 384 for FT-EAP-SHA384; otherwise, 256 1877 */ 1878 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN) 1879 return -1; 1880 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R0 using KDF-%s", 1881 use_sha384 ? "SHA384" : "SHA256"); 1882 wpa_hexdump_key(MSG_DEBUG, "FT: XXKey", xxkey, xxkey_len); 1883 wpa_hexdump_ascii(MSG_DEBUG, "FT: SSID", ssid, ssid_len); 1884 wpa_hexdump(MSG_DEBUG, "FT: MDID", mdid, MOBILITY_DOMAIN_ID_LEN); 1885 wpa_hexdump_ascii(MSG_DEBUG, "FT: R0KH-ID", r0kh_id, r0kh_id_len); 1886 wpa_printf(MSG_DEBUG, "FT: S0KH-ID: " MACSTR, MAC2STR(s0kh_id)); 1887 pos = buf; 1888 *pos++ = ssid_len; 1889 os_memcpy(pos, ssid, ssid_len); 1890 pos += ssid_len; 1891 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN); 1892 pos += MOBILITY_DOMAIN_ID_LEN; 1893 *pos++ = r0kh_id_len; 1894 os_memcpy(pos, r0kh_id, r0kh_id_len); 1895 pos += r0kh_id_len; 1896 os_memcpy(pos, s0kh_id, ETH_ALEN); 1897 pos += ETH_ALEN; 1898 1899 #ifdef CONFIG_SHA384 1900 if (use_sha384) { 1901 if (xxkey_len != SHA384_MAC_LEN) { 1902 wpa_printf(MSG_ERROR, 1903 "FT: Unexpected XXKey length %d (expected %d)", 1904 (int) xxkey_len, SHA384_MAC_LEN); 1905 return -1; 1906 } 1907 if (sha384_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, 1908 r0_key_data, r0_key_data_len) < 0) 1909 return -1; 1910 } 1911 #endif /* CONFIG_SHA384 */ 1912 if (!use_sha384) { 1913 if (xxkey_len != PMK_LEN) { 1914 wpa_printf(MSG_ERROR, 1915 "FT: Unexpected XXKey length %d (expected %d)", 1916 (int) xxkey_len, PMK_LEN); 1917 return -1; 1918 } 1919 if (sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, 1920 r0_key_data, r0_key_data_len) < 0) 1921 return -1; 1922 } 1923 os_memcpy(pmk_r0, r0_key_data, q); 1924 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, q); 1925 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0Name-Salt", &r0_key_data[q], 16); 1926 1927 /* 1928 * PMKR0Name = Truncate-128(Hash("FT-R0N" || PMK-R0Name-Salt) 1929 */ 1930 addr[0] = (const u8 *) "FT-R0N"; 1931 len[0] = 6; 1932 addr[1] = &r0_key_data[q]; 1933 len[1] = 16; 1934 1935 #ifdef CONFIG_SHA384 1936 if (use_sha384 && sha384_vector(2, addr, len, hash) < 0) 1937 return -1; 1938 #endif /* CONFIG_SHA384 */ 1939 if (!use_sha384 && sha256_vector(2, addr, len, hash) < 0) 1940 return -1; 1941 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN); 1942 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN); 1943 forced_memzero(r0_key_data, sizeof(r0_key_data)); 1944 return 0; 1945 } 1946 1947 1948 /** 1949 * wpa_derive_pmk_r1_name - Derive PMKR1Name 1950 * 1951 * IEEE Std 802.11r-2008 - 8.5.1.5.4 1952 */ 1953 int wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id, 1954 const u8 *s1kh_id, u8 *pmk_r1_name, int use_sha384) 1955 { 1956 u8 hash[48]; 1957 const u8 *addr[4]; 1958 size_t len[4]; 1959 1960 /* 1961 * PMKR1Name = Truncate-128(Hash("FT-R1N" || PMKR0Name || 1962 * R1KH-ID || S1KH-ID)) 1963 */ 1964 addr[0] = (const u8 *) "FT-R1N"; 1965 len[0] = 6; 1966 addr[1] = pmk_r0_name; 1967 len[1] = WPA_PMK_NAME_LEN; 1968 addr[2] = r1kh_id; 1969 len[2] = FT_R1KH_ID_LEN; 1970 addr[3] = s1kh_id; 1971 len[3] = ETH_ALEN; 1972 1973 #ifdef CONFIG_SHA384 1974 if (use_sha384 && sha384_vector(4, addr, len, hash) < 0) 1975 return -1; 1976 #endif /* CONFIG_SHA384 */ 1977 if (!use_sha384 && sha256_vector(4, addr, len, hash) < 0) 1978 return -1; 1979 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN); 1980 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN); 1981 return 0; 1982 } 1983 1984 1985 /** 1986 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0 1987 * 1988 * IEEE Std 802.11r-2008 - 8.5.1.5.4 1989 */ 1990 int wpa_derive_pmk_r1(const u8 *pmk_r0, size_t pmk_r0_len, 1991 const u8 *pmk_r0_name, 1992 const u8 *r1kh_id, const u8 *s1kh_id, 1993 u8 *pmk_r1, u8 *pmk_r1_name) 1994 { 1995 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN]; 1996 u8 *pos; 1997 1998 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */ 1999 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R1 using KDF-%s", 2000 pmk_r0_len == SHA384_MAC_LEN ? "SHA384" : "SHA256"); 2001 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len); 2002 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", r1kh_id, FT_R1KH_ID_LEN); 2003 wpa_printf(MSG_DEBUG, "FT: S1KH-ID: " MACSTR, MAC2STR(s1kh_id)); 2004 pos = buf; 2005 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN); 2006 pos += FT_R1KH_ID_LEN; 2007 os_memcpy(pos, s1kh_id, ETH_ALEN); 2008 pos += ETH_ALEN; 2009 2010 #ifdef CONFIG_SHA384 2011 if (pmk_r0_len == SHA384_MAC_LEN && 2012 sha384_prf(pmk_r0, pmk_r0_len, "FT-R1", 2013 buf, pos - buf, pmk_r1, pmk_r0_len) < 0) 2014 return -1; 2015 #endif /* CONFIG_SHA384 */ 2016 if (pmk_r0_len == PMK_LEN && 2017 sha256_prf(pmk_r0, pmk_r0_len, "FT-R1", 2018 buf, pos - buf, pmk_r1, pmk_r0_len) < 0) 2019 return -1; 2020 if (pmk_r0_len != SHA384_MAC_LEN && pmk_r0_len != PMK_LEN) { 2021 wpa_printf(MSG_ERROR, "FT: Unexpected PMK-R0 length %d", 2022 (int) pmk_r0_len); 2023 return -1; 2024 } 2025 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r0_len); 2026 2027 return wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, 2028 pmk_r1_name, 2029 pmk_r0_len == SHA384_MAC_LEN); 2030 } 2031 2032 2033 /** 2034 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1 2035 * 2036 * IEEE Std 802.11r-2008 - 8.5.1.5.5 2037 */ 2038 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, size_t pmk_r1_len, 2039 const u8 *snonce, const u8 *anonce, 2040 const u8 *sta_addr, const u8 *bssid, 2041 const u8 *pmk_r1_name, 2042 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher, 2043 size_t kdk_len) 2044 { 2045 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN]; 2046 u8 *pos, hash[32]; 2047 const u8 *addr[6]; 2048 size_t len[6]; 2049 u8 tmp[2 * WPA_KCK_MAX_LEN + 2 * WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + 2050 WPA_KDK_MAX_LEN]; 2051 size_t ptk_len, offset; 2052 int use_sha384 = wpa_key_mgmt_sha384(akmp); 2053 2054 if (kdk_len > WPA_KDK_MAX_LEN) { 2055 wpa_printf(MSG_ERROR, 2056 "FT: KDK len=%zu exceeds max supported len", 2057 kdk_len); 2058 return -1; 2059 } 2060 2061 /* 2062 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce || 2063 * BSSID || STA-ADDR) 2064 */ 2065 wpa_printf(MSG_DEBUG, "FT: Derive PTK using KDF-%s", 2066 use_sha384 ? "SHA384" : "SHA256"); 2067 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len); 2068 wpa_hexdump(MSG_DEBUG, "FT: SNonce", snonce, WPA_NONCE_LEN); 2069 wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN); 2070 wpa_printf(MSG_DEBUG, "FT: BSSID=" MACSTR " STA-ADDR=" MACSTR, 2071 MAC2STR(bssid), MAC2STR(sta_addr)); 2072 pos = buf; 2073 os_memcpy(pos, snonce, WPA_NONCE_LEN); 2074 pos += WPA_NONCE_LEN; 2075 os_memcpy(pos, anonce, WPA_NONCE_LEN); 2076 pos += WPA_NONCE_LEN; 2077 os_memcpy(pos, bssid, ETH_ALEN); 2078 pos += ETH_ALEN; 2079 os_memcpy(pos, sta_addr, ETH_ALEN); 2080 pos += ETH_ALEN; 2081 2082 ptk->kck_len = wpa_kck_len(akmp, PMK_LEN); 2083 ptk->kck2_len = wpa_kck2_len(akmp); 2084 ptk->kek_len = wpa_kek_len(akmp, PMK_LEN); 2085 ptk->kek2_len = wpa_kek2_len(akmp); 2086 ptk->tk_len = wpa_cipher_key_len(cipher); 2087 ptk->kdk_len = kdk_len; 2088 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + 2089 ptk->kck2_len + ptk->kek2_len + ptk->kdk_len; 2090 2091 #ifdef CONFIG_SHA384 2092 if (use_sha384) { 2093 if (pmk_r1_len != SHA384_MAC_LEN) { 2094 wpa_printf(MSG_ERROR, 2095 "FT: Unexpected PMK-R1 length %d (expected %d)", 2096 (int) pmk_r1_len, SHA384_MAC_LEN); 2097 return -1; 2098 } 2099 if (sha384_prf(pmk_r1, pmk_r1_len, "FT-PTK", 2100 buf, pos - buf, tmp, ptk_len) < 0) 2101 return -1; 2102 } 2103 #endif /* CONFIG_SHA384 */ 2104 if (!use_sha384) { 2105 if (pmk_r1_len != PMK_LEN) { 2106 wpa_printf(MSG_ERROR, 2107 "FT: Unexpected PMK-R1 length %d (expected %d)", 2108 (int) pmk_r1_len, PMK_LEN); 2109 return -1; 2110 } 2111 if (sha256_prf(pmk_r1, pmk_r1_len, "FT-PTK", 2112 buf, pos - buf, tmp, ptk_len) < 0) 2113 return -1; 2114 } 2115 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", tmp, ptk_len); 2116 2117 /* 2118 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce || 2119 * ANonce || BSSID || STA-ADDR)) 2120 */ 2121 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN); 2122 addr[0] = pmk_r1_name; 2123 len[0] = WPA_PMK_NAME_LEN; 2124 addr[1] = (const u8 *) "FT-PTKN"; 2125 len[1] = 7; 2126 addr[2] = snonce; 2127 len[2] = WPA_NONCE_LEN; 2128 addr[3] = anonce; 2129 len[3] = WPA_NONCE_LEN; 2130 addr[4] = bssid; 2131 len[4] = ETH_ALEN; 2132 addr[5] = sta_addr; 2133 len[5] = ETH_ALEN; 2134 2135 if (sha256_vector(6, addr, len, hash) < 0) 2136 return -1; 2137 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN); 2138 2139 os_memcpy(ptk->kck, tmp, ptk->kck_len); 2140 offset = ptk->kck_len; 2141 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len); 2142 offset += ptk->kek_len; 2143 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len); 2144 offset += ptk->tk_len; 2145 os_memcpy(ptk->kck2, tmp + offset, ptk->kck2_len); 2146 offset += ptk->kck2_len; 2147 os_memcpy(ptk->kek2, tmp + offset, ptk->kek2_len); 2148 offset += ptk->kek2_len; 2149 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len); 2150 2151 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len); 2152 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len); 2153 if (ptk->kck2_len) 2154 wpa_hexdump_key(MSG_DEBUG, "FT: KCK2", 2155 ptk->kck2, ptk->kck2_len); 2156 if (ptk->kek2_len) 2157 wpa_hexdump_key(MSG_DEBUG, "FT: KEK2", 2158 ptk->kek2, ptk->kek2_len); 2159 if (ptk->kdk_len) 2160 wpa_hexdump_key(MSG_DEBUG, "FT: KDK", ptk->kdk, ptk->kdk_len); 2161 2162 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len); 2163 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN); 2164 2165 forced_memzero(tmp, sizeof(tmp)); 2166 2167 return 0; 2168 } 2169 2170 #endif /* CONFIG_IEEE80211R */ 2171 2172 2173 /** 2174 * rsn_pmkid - Calculate PMK identifier 2175 * @pmk: Pairwise master key 2176 * @pmk_len: Length of pmk in bytes 2177 * @aa: Authenticator address 2178 * @spa: Supplicant address 2179 * @pmkid: Buffer for PMKID 2180 * @akmp: Negotiated key management protocol 2181 * 2182 * IEEE Std 802.11-2016 - 12.7.1.3 Pairwise key hierarchy 2183 * AKM: 00-0F-AC:5, 00-0F-AC:6, 00-0F-AC:14, 00-0F-AC:16 2184 * PMKID = Truncate-128(HMAC-SHA-256(PMK, "PMK Name" || AA || SPA)) 2185 * AKM: 00-0F-AC:11 2186 * See rsn_pmkid_suite_b() 2187 * AKM: 00-0F-AC:12 2188 * See rsn_pmkid_suite_b_192() 2189 * AKM: 00-0F-AC:13, 00-0F-AC:15, 00-0F-AC:17 2190 * PMKID = Truncate-128(HMAC-SHA-384(PMK, "PMK Name" || AA || SPA)) 2191 * Otherwise: 2192 * PMKID = Truncate-128(HMAC-SHA-1(PMK, "PMK Name" || AA || SPA)) 2193 */ 2194 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa, 2195 u8 *pmkid, int akmp) 2196 { 2197 char *title = "PMK Name"; 2198 const u8 *addr[3]; 2199 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; 2200 unsigned char hash[SHA384_MAC_LEN]; 2201 2202 addr[0] = (u8 *) title; 2203 addr[1] = aa; 2204 addr[2] = spa; 2205 2206 if (0) { 2207 #if defined(CONFIG_FILS) || defined(CONFIG_SHA384) 2208 } else if (wpa_key_mgmt_sha384(akmp)) { 2209 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-384"); 2210 hmac_sha384_vector(pmk, pmk_len, 3, addr, len, hash); 2211 #endif /* CONFIG_FILS || CONFIG_SHA384 */ 2212 } else if (wpa_key_mgmt_sha256(akmp)) { 2213 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-256"); 2214 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash); 2215 } else { 2216 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-1"); 2217 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash); 2218 } 2219 wpa_hexdump(MSG_DEBUG, "RSN: Derived PMKID", hash, PMKID_LEN); 2220 os_memcpy(pmkid, hash, PMKID_LEN); 2221 } 2222 2223 2224 #ifdef CONFIG_SUITEB 2225 /** 2226 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM 2227 * @kck: Key confirmation key 2228 * @kck_len: Length of kck in bytes 2229 * @aa: Authenticator address 2230 * @spa: Supplicant address 2231 * @pmkid: Buffer for PMKID 2232 * Returns: 0 on success, -1 on failure 2233 * 2234 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy 2235 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA)) 2236 */ 2237 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa, 2238 const u8 *spa, u8 *pmkid) 2239 { 2240 char *title = "PMK Name"; 2241 const u8 *addr[3]; 2242 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; 2243 unsigned char hash[SHA256_MAC_LEN]; 2244 2245 addr[0] = (u8 *) title; 2246 addr[1] = aa; 2247 addr[2] = spa; 2248 2249 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0) 2250 return -1; 2251 os_memcpy(pmkid, hash, PMKID_LEN); 2252 return 0; 2253 } 2254 #endif /* CONFIG_SUITEB */ 2255 2256 2257 #ifdef CONFIG_SUITEB192 2258 /** 2259 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM 2260 * @kck: Key confirmation key 2261 * @kck_len: Length of kck in bytes 2262 * @aa: Authenticator address 2263 * @spa: Supplicant address 2264 * @pmkid: Buffer for PMKID 2265 * Returns: 0 on success, -1 on failure 2266 * 2267 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy 2268 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA)) 2269 */ 2270 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa, 2271 const u8 *spa, u8 *pmkid) 2272 { 2273 char *title = "PMK Name"; 2274 const u8 *addr[3]; 2275 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; 2276 unsigned char hash[SHA384_MAC_LEN]; 2277 2278 addr[0] = (u8 *) title; 2279 addr[1] = aa; 2280 addr[2] = spa; 2281 2282 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0) 2283 return -1; 2284 os_memcpy(pmkid, hash, PMKID_LEN); 2285 return 0; 2286 } 2287 #endif /* CONFIG_SUITEB192 */ 2288 2289 2290 /** 2291 * wpa_cipher_txt - Convert cipher suite to a text string 2292 * @cipher: Cipher suite (WPA_CIPHER_* enum) 2293 * Returns: Pointer to a text string of the cipher suite name 2294 */ 2295 const char * wpa_cipher_txt(int cipher) 2296 { 2297 switch (cipher) { 2298 case WPA_CIPHER_NONE: 2299 return "NONE"; 2300 #ifdef CONFIG_WEP 2301 case WPA_CIPHER_WEP40: 2302 return "WEP-40"; 2303 case WPA_CIPHER_WEP104: 2304 return "WEP-104"; 2305 #endif /* CONFIG_WEP */ 2306 case WPA_CIPHER_TKIP: 2307 return "TKIP"; 2308 case WPA_CIPHER_CCMP: 2309 return "CCMP"; 2310 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP: 2311 return "CCMP+TKIP"; 2312 case WPA_CIPHER_GCMP: 2313 return "GCMP"; 2314 case WPA_CIPHER_GCMP_256: 2315 return "GCMP-256"; 2316 case WPA_CIPHER_CCMP_256: 2317 return "CCMP-256"; 2318 case WPA_CIPHER_AES_128_CMAC: 2319 return "BIP"; 2320 case WPA_CIPHER_BIP_GMAC_128: 2321 return "BIP-GMAC-128"; 2322 case WPA_CIPHER_BIP_GMAC_256: 2323 return "BIP-GMAC-256"; 2324 case WPA_CIPHER_BIP_CMAC_256: 2325 return "BIP-CMAC-256"; 2326 case WPA_CIPHER_GTK_NOT_USED: 2327 return "GTK_NOT_USED"; 2328 default: 2329 return "UNKNOWN"; 2330 } 2331 } 2332 2333 2334 /** 2335 * wpa_key_mgmt_txt - Convert key management suite to a text string 2336 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum) 2337 * @proto: WPA/WPA2 version (WPA_PROTO_*) 2338 * Returns: Pointer to a text string of the key management suite name 2339 */ 2340 const char * wpa_key_mgmt_txt(int key_mgmt, int proto) 2341 { 2342 switch (key_mgmt) { 2343 case WPA_KEY_MGMT_IEEE8021X: 2344 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA)) 2345 return "WPA2+WPA/IEEE 802.1X/EAP"; 2346 return proto == WPA_PROTO_RSN ? 2347 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP"; 2348 case WPA_KEY_MGMT_PSK: 2349 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA)) 2350 return "WPA2-PSK+WPA-PSK"; 2351 return proto == WPA_PROTO_RSN ? 2352 "WPA2-PSK" : "WPA-PSK"; 2353 case WPA_KEY_MGMT_NONE: 2354 return "NONE"; 2355 case WPA_KEY_MGMT_WPA_NONE: 2356 return "WPA-NONE"; 2357 case WPA_KEY_MGMT_IEEE8021X_NO_WPA: 2358 return "IEEE 802.1X (no WPA)"; 2359 #ifdef CONFIG_IEEE80211R 2360 case WPA_KEY_MGMT_FT_IEEE8021X: 2361 return "FT-EAP"; 2362 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 2363 return "FT-EAP-SHA384"; 2364 case WPA_KEY_MGMT_FT_PSK: 2365 return "FT-PSK"; 2366 #endif /* CONFIG_IEEE80211R */ 2367 case WPA_KEY_MGMT_IEEE8021X_SHA256: 2368 return "WPA2-EAP-SHA256"; 2369 case WPA_KEY_MGMT_PSK_SHA256: 2370 return "WPA2-PSK-SHA256"; 2371 case WPA_KEY_MGMT_WPS: 2372 return "WPS"; 2373 case WPA_KEY_MGMT_SAE: 2374 return "SAE"; 2375 case WPA_KEY_MGMT_FT_SAE: 2376 return "FT-SAE"; 2377 case WPA_KEY_MGMT_OSEN: 2378 return "OSEN"; 2379 case WPA_KEY_MGMT_IEEE8021X_SUITE_B: 2380 return "WPA2-EAP-SUITE-B"; 2381 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 2382 return "WPA2-EAP-SUITE-B-192"; 2383 case WPA_KEY_MGMT_FILS_SHA256: 2384 return "FILS-SHA256"; 2385 case WPA_KEY_MGMT_FILS_SHA384: 2386 return "FILS-SHA384"; 2387 case WPA_KEY_MGMT_FT_FILS_SHA256: 2388 return "FT-FILS-SHA256"; 2389 case WPA_KEY_MGMT_FT_FILS_SHA384: 2390 return "FT-FILS-SHA384"; 2391 case WPA_KEY_MGMT_OWE: 2392 return "OWE"; 2393 case WPA_KEY_MGMT_DPP: 2394 return "DPP"; 2395 case WPA_KEY_MGMT_PASN: 2396 return "PASN"; 2397 default: 2398 return "UNKNOWN"; 2399 } 2400 } 2401 2402 2403 u32 wpa_akm_to_suite(int akm) 2404 { 2405 if (akm & WPA_KEY_MGMT_FT_IEEE8021X_SHA384) 2406 return RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384; 2407 if (akm & WPA_KEY_MGMT_FT_IEEE8021X) 2408 return RSN_AUTH_KEY_MGMT_FT_802_1X; 2409 if (akm & WPA_KEY_MGMT_FT_PSK) 2410 return RSN_AUTH_KEY_MGMT_FT_PSK; 2411 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256) 2412 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 2413 if (akm & WPA_KEY_MGMT_IEEE8021X) 2414 return RSN_AUTH_KEY_MGMT_UNSPEC_802_1X; 2415 if (akm & WPA_KEY_MGMT_PSK_SHA256) 2416 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 2417 if (akm & WPA_KEY_MGMT_PSK) 2418 return RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X; 2419 if (akm & WPA_KEY_MGMT_CCKM) 2420 return RSN_AUTH_KEY_MGMT_CCKM; 2421 if (akm & WPA_KEY_MGMT_OSEN) 2422 return RSN_AUTH_KEY_MGMT_OSEN; 2423 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B) 2424 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; 2425 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) 2426 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; 2427 if (akm & WPA_KEY_MGMT_FILS_SHA256) 2428 return RSN_AUTH_KEY_MGMT_FILS_SHA256; 2429 if (akm & WPA_KEY_MGMT_FILS_SHA384) 2430 return RSN_AUTH_KEY_MGMT_FILS_SHA384; 2431 if (akm & WPA_KEY_MGMT_FT_FILS_SHA256) 2432 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA256; 2433 if (akm & WPA_KEY_MGMT_FT_FILS_SHA384) 2434 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA384; 2435 if (akm & WPA_KEY_MGMT_SAE) 2436 return RSN_AUTH_KEY_MGMT_SAE; 2437 if (akm & WPA_KEY_MGMT_FT_SAE) 2438 return RSN_AUTH_KEY_MGMT_FT_SAE; 2439 if (akm & WPA_KEY_MGMT_OWE) 2440 return RSN_AUTH_KEY_MGMT_OWE; 2441 if (akm & WPA_KEY_MGMT_DPP) 2442 return RSN_AUTH_KEY_MGMT_DPP; 2443 return 0; 2444 } 2445 2446 2447 int wpa_compare_rsn_ie(int ft_initial_assoc, 2448 const u8 *ie1, size_t ie1len, 2449 const u8 *ie2, size_t ie2len) 2450 { 2451 if (ie1 == NULL || ie2 == NULL) 2452 return -1; 2453 2454 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0) 2455 return 0; /* identical IEs */ 2456 2457 #ifdef CONFIG_IEEE80211R 2458 if (ft_initial_assoc) { 2459 struct wpa_ie_data ie1d, ie2d; 2460 /* 2461 * The PMKID-List in RSN IE is different between Beacon/Probe 2462 * Response/(Re)Association Request frames and EAPOL-Key 2463 * messages in FT initial mobility domain association. Allow 2464 * for this, but verify that other parts of the RSN IEs are 2465 * identical. 2466 */ 2467 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 || 2468 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0) 2469 return -1; 2470 if (ie1d.proto == ie2d.proto && 2471 ie1d.pairwise_cipher == ie2d.pairwise_cipher && 2472 ie1d.group_cipher == ie2d.group_cipher && 2473 ie1d.key_mgmt == ie2d.key_mgmt && 2474 ie1d.capabilities == ie2d.capabilities && 2475 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher) 2476 return 0; 2477 } 2478 #endif /* CONFIG_IEEE80211R */ 2479 2480 return -1; 2481 } 2482 2483 2484 int wpa_insert_pmkid(u8 *ies, size_t *ies_len, const u8 *pmkid) 2485 { 2486 u8 *start, *end, *rpos, *rend; 2487 int added = 0; 2488 2489 start = ies; 2490 end = ies + *ies_len; 2491 2492 while (start < end) { 2493 if (*start == WLAN_EID_RSN) 2494 break; 2495 start += 2 + start[1]; 2496 } 2497 if (start >= end) { 2498 wpa_printf(MSG_ERROR, "RSN: Could not find RSNE in IEs data"); 2499 return -1; 2500 } 2501 wpa_hexdump(MSG_DEBUG, "RSN: RSNE before modification", 2502 start, 2 + start[1]); 2503 2504 /* Find start of PMKID-Count */ 2505 rpos = start + 2; 2506 rend = rpos + start[1]; 2507 2508 /* Skip Version and Group Data Cipher Suite */ 2509 rpos += 2 + 4; 2510 /* Skip Pairwise Cipher Suite Count and List */ 2511 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN; 2512 /* Skip AKM Suite Count and List */ 2513 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN; 2514 2515 if (rpos == rend) { 2516 /* Add RSN Capabilities */ 2517 os_memmove(rpos + 2, rpos, end - rpos); 2518 *rpos++ = 0; 2519 *rpos++ = 0; 2520 added += 2; 2521 start[1] += 2; 2522 rend = rpos; 2523 } else { 2524 /* Skip RSN Capabilities */ 2525 rpos += 2; 2526 if (rpos > rend) { 2527 wpa_printf(MSG_ERROR, 2528 "RSN: Could not parse RSNE in IEs data"); 2529 return -1; 2530 } 2531 } 2532 2533 if (rpos == rend) { 2534 /* No PMKID-Count field included; add it */ 2535 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos); 2536 WPA_PUT_LE16(rpos, 1); 2537 rpos += 2; 2538 os_memcpy(rpos, pmkid, PMKID_LEN); 2539 added += 2 + PMKID_LEN; 2540 start[1] += 2 + PMKID_LEN; 2541 } else { 2542 u16 num_pmkid; 2543 2544 if (rend - rpos < 2) 2545 return -1; 2546 num_pmkid = WPA_GET_LE16(rpos); 2547 /* PMKID-Count was included; use it */ 2548 if (num_pmkid != 0) { 2549 u8 *after; 2550 2551 if (num_pmkid * PMKID_LEN > rend - rpos - 2) 2552 return -1; 2553 /* 2554 * PMKID may have been included in RSN IE in 2555 * (Re)Association Request frame, so remove the old 2556 * PMKID(s) first before adding the new one. 2557 */ 2558 wpa_printf(MSG_DEBUG, 2559 "RSN: Remove %u old PMKID(s) from RSNE", 2560 num_pmkid); 2561 after = rpos + 2 + num_pmkid * PMKID_LEN; 2562 os_memmove(rpos + 2, after, end - after); 2563 start[1] -= num_pmkid * PMKID_LEN; 2564 added -= num_pmkid * PMKID_LEN; 2565 } 2566 WPA_PUT_LE16(rpos, 1); 2567 rpos += 2; 2568 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos); 2569 os_memcpy(rpos, pmkid, PMKID_LEN); 2570 added += PMKID_LEN; 2571 start[1] += PMKID_LEN; 2572 } 2573 2574 wpa_hexdump(MSG_DEBUG, "RSN: RSNE after modification (PMKID inserted)", 2575 start, 2 + start[1]); 2576 2577 *ies_len += added; 2578 2579 return 0; 2580 } 2581 2582 2583 int wpa_cipher_key_len(int cipher) 2584 { 2585 switch (cipher) { 2586 case WPA_CIPHER_CCMP_256: 2587 case WPA_CIPHER_GCMP_256: 2588 case WPA_CIPHER_BIP_GMAC_256: 2589 case WPA_CIPHER_BIP_CMAC_256: 2590 return 32; 2591 case WPA_CIPHER_CCMP: 2592 case WPA_CIPHER_GCMP: 2593 case WPA_CIPHER_AES_128_CMAC: 2594 case WPA_CIPHER_BIP_GMAC_128: 2595 return 16; 2596 case WPA_CIPHER_TKIP: 2597 return 32; 2598 } 2599 2600 return 0; 2601 } 2602 2603 2604 int wpa_cipher_rsc_len(int cipher) 2605 { 2606 switch (cipher) { 2607 case WPA_CIPHER_CCMP_256: 2608 case WPA_CIPHER_GCMP_256: 2609 case WPA_CIPHER_CCMP: 2610 case WPA_CIPHER_GCMP: 2611 case WPA_CIPHER_TKIP: 2612 return 6; 2613 } 2614 2615 return 0; 2616 } 2617 2618 2619 enum wpa_alg wpa_cipher_to_alg(int cipher) 2620 { 2621 switch (cipher) { 2622 case WPA_CIPHER_CCMP_256: 2623 return WPA_ALG_CCMP_256; 2624 case WPA_CIPHER_GCMP_256: 2625 return WPA_ALG_GCMP_256; 2626 case WPA_CIPHER_CCMP: 2627 return WPA_ALG_CCMP; 2628 case WPA_CIPHER_GCMP: 2629 return WPA_ALG_GCMP; 2630 case WPA_CIPHER_TKIP: 2631 return WPA_ALG_TKIP; 2632 case WPA_CIPHER_AES_128_CMAC: 2633 return WPA_ALG_BIP_CMAC_128; 2634 case WPA_CIPHER_BIP_GMAC_128: 2635 return WPA_ALG_BIP_GMAC_128; 2636 case WPA_CIPHER_BIP_GMAC_256: 2637 return WPA_ALG_BIP_GMAC_256; 2638 case WPA_CIPHER_BIP_CMAC_256: 2639 return WPA_ALG_BIP_CMAC_256; 2640 } 2641 return WPA_ALG_NONE; 2642 } 2643 2644 2645 int wpa_cipher_valid_pairwise(int cipher) 2646 { 2647 #ifdef CONFIG_NO_TKIP 2648 return cipher == WPA_CIPHER_CCMP_256 || 2649 cipher == WPA_CIPHER_GCMP_256 || 2650 cipher == WPA_CIPHER_CCMP || 2651 cipher == WPA_CIPHER_GCMP; 2652 #else /* CONFIG_NO_TKIP */ 2653 return cipher == WPA_CIPHER_CCMP_256 || 2654 cipher == WPA_CIPHER_GCMP_256 || 2655 cipher == WPA_CIPHER_CCMP || 2656 cipher == WPA_CIPHER_GCMP || 2657 cipher == WPA_CIPHER_TKIP; 2658 #endif /* CONFIG_NO_TKIP */ 2659 } 2660 2661 2662 u32 wpa_cipher_to_suite(int proto, int cipher) 2663 { 2664 if (cipher & WPA_CIPHER_CCMP_256) 2665 return RSN_CIPHER_SUITE_CCMP_256; 2666 if (cipher & WPA_CIPHER_GCMP_256) 2667 return RSN_CIPHER_SUITE_GCMP_256; 2668 if (cipher & WPA_CIPHER_CCMP) 2669 return (proto == WPA_PROTO_RSN ? 2670 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP); 2671 if (cipher & WPA_CIPHER_GCMP) 2672 return RSN_CIPHER_SUITE_GCMP; 2673 if (cipher & WPA_CIPHER_TKIP) 2674 return (proto == WPA_PROTO_RSN ? 2675 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP); 2676 if (cipher & WPA_CIPHER_NONE) 2677 return (proto == WPA_PROTO_RSN ? 2678 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE); 2679 if (cipher & WPA_CIPHER_GTK_NOT_USED) 2680 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED; 2681 if (cipher & WPA_CIPHER_AES_128_CMAC) 2682 return RSN_CIPHER_SUITE_AES_128_CMAC; 2683 if (cipher & WPA_CIPHER_BIP_GMAC_128) 2684 return RSN_CIPHER_SUITE_BIP_GMAC_128; 2685 if (cipher & WPA_CIPHER_BIP_GMAC_256) 2686 return RSN_CIPHER_SUITE_BIP_GMAC_256; 2687 if (cipher & WPA_CIPHER_BIP_CMAC_256) 2688 return RSN_CIPHER_SUITE_BIP_CMAC_256; 2689 return 0; 2690 } 2691 2692 2693 int rsn_cipher_put_suites(u8 *start, int ciphers) 2694 { 2695 u8 *pos = start; 2696 2697 if (ciphers & WPA_CIPHER_CCMP_256) { 2698 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256); 2699 pos += RSN_SELECTOR_LEN; 2700 } 2701 if (ciphers & WPA_CIPHER_GCMP_256) { 2702 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256); 2703 pos += RSN_SELECTOR_LEN; 2704 } 2705 if (ciphers & WPA_CIPHER_CCMP) { 2706 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); 2707 pos += RSN_SELECTOR_LEN; 2708 } 2709 if (ciphers & WPA_CIPHER_GCMP) { 2710 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP); 2711 pos += RSN_SELECTOR_LEN; 2712 } 2713 if (ciphers & WPA_CIPHER_TKIP) { 2714 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP); 2715 pos += RSN_SELECTOR_LEN; 2716 } 2717 if (ciphers & WPA_CIPHER_NONE) { 2718 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE); 2719 pos += RSN_SELECTOR_LEN; 2720 } 2721 2722 return (pos - start) / RSN_SELECTOR_LEN; 2723 } 2724 2725 2726 int wpa_cipher_put_suites(u8 *start, int ciphers) 2727 { 2728 u8 *pos = start; 2729 2730 if (ciphers & WPA_CIPHER_CCMP) { 2731 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP); 2732 pos += WPA_SELECTOR_LEN; 2733 } 2734 if (ciphers & WPA_CIPHER_TKIP) { 2735 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP); 2736 pos += WPA_SELECTOR_LEN; 2737 } 2738 if (ciphers & WPA_CIPHER_NONE) { 2739 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE); 2740 pos += WPA_SELECTOR_LEN; 2741 } 2742 2743 return (pos - start) / RSN_SELECTOR_LEN; 2744 } 2745 2746 2747 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed) 2748 { 2749 if (ciphers & WPA_CIPHER_CCMP_256) 2750 return WPA_CIPHER_CCMP_256; 2751 if (ciphers & WPA_CIPHER_GCMP_256) 2752 return WPA_CIPHER_GCMP_256; 2753 if (ciphers & WPA_CIPHER_CCMP) 2754 return WPA_CIPHER_CCMP; 2755 if (ciphers & WPA_CIPHER_GCMP) 2756 return WPA_CIPHER_GCMP; 2757 if (ciphers & WPA_CIPHER_TKIP) 2758 return WPA_CIPHER_TKIP; 2759 if (none_allowed && (ciphers & WPA_CIPHER_NONE)) 2760 return WPA_CIPHER_NONE; 2761 return -1; 2762 } 2763 2764 2765 int wpa_pick_group_cipher(int ciphers) 2766 { 2767 if (ciphers & WPA_CIPHER_CCMP_256) 2768 return WPA_CIPHER_CCMP_256; 2769 if (ciphers & WPA_CIPHER_GCMP_256) 2770 return WPA_CIPHER_GCMP_256; 2771 if (ciphers & WPA_CIPHER_CCMP) 2772 return WPA_CIPHER_CCMP; 2773 if (ciphers & WPA_CIPHER_GCMP) 2774 return WPA_CIPHER_GCMP; 2775 if (ciphers & WPA_CIPHER_GTK_NOT_USED) 2776 return WPA_CIPHER_GTK_NOT_USED; 2777 if (ciphers & WPA_CIPHER_TKIP) 2778 return WPA_CIPHER_TKIP; 2779 return -1; 2780 } 2781 2782 2783 int wpa_parse_cipher(const char *value) 2784 { 2785 int val = 0, last; 2786 char *start, *end, *buf; 2787 2788 buf = os_strdup(value); 2789 if (buf == NULL) 2790 return -1; 2791 start = buf; 2792 2793 while (*start != '\0') { 2794 while (*start == ' ' || *start == '\t') 2795 start++; 2796 if (*start == '\0') 2797 break; 2798 end = start; 2799 while (*end != ' ' && *end != '\t' && *end != '\0') 2800 end++; 2801 last = *end == '\0'; 2802 *end = '\0'; 2803 if (os_strcmp(start, "CCMP-256") == 0) 2804 val |= WPA_CIPHER_CCMP_256; 2805 else if (os_strcmp(start, "GCMP-256") == 0) 2806 val |= WPA_CIPHER_GCMP_256; 2807 else if (os_strcmp(start, "CCMP") == 0) 2808 val |= WPA_CIPHER_CCMP; 2809 else if (os_strcmp(start, "GCMP") == 0) 2810 val |= WPA_CIPHER_GCMP; 2811 #ifndef CONFIG_NO_TKIP 2812 else if (os_strcmp(start, "TKIP") == 0) 2813 val |= WPA_CIPHER_TKIP; 2814 #endif /* CONFIG_NO_TKIP */ 2815 #ifdef CONFIG_WEP 2816 else if (os_strcmp(start, "WEP104") == 0) 2817 val |= WPA_CIPHER_WEP104; 2818 else if (os_strcmp(start, "WEP40") == 0) 2819 val |= WPA_CIPHER_WEP40; 2820 #endif /* CONFIG_WEP */ 2821 else if (os_strcmp(start, "NONE") == 0) 2822 val |= WPA_CIPHER_NONE; 2823 else if (os_strcmp(start, "GTK_NOT_USED") == 0) 2824 val |= WPA_CIPHER_GTK_NOT_USED; 2825 else if (os_strcmp(start, "AES-128-CMAC") == 0) 2826 val |= WPA_CIPHER_AES_128_CMAC; 2827 else if (os_strcmp(start, "BIP-GMAC-128") == 0) 2828 val |= WPA_CIPHER_BIP_GMAC_128; 2829 else if (os_strcmp(start, "BIP-GMAC-256") == 0) 2830 val |= WPA_CIPHER_BIP_GMAC_256; 2831 else if (os_strcmp(start, "BIP-CMAC-256") == 0) 2832 val |= WPA_CIPHER_BIP_CMAC_256; 2833 else { 2834 os_free(buf); 2835 return -1; 2836 } 2837 2838 if (last) 2839 break; 2840 start = end + 1; 2841 } 2842 os_free(buf); 2843 2844 return val; 2845 } 2846 2847 2848 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim) 2849 { 2850 char *pos = start; 2851 int ret; 2852 2853 if (ciphers & WPA_CIPHER_CCMP_256) { 2854 ret = os_snprintf(pos, end - pos, "%sCCMP-256", 2855 pos == start ? "" : delim); 2856 if (os_snprintf_error(end - pos, ret)) 2857 return -1; 2858 pos += ret; 2859 } 2860 if (ciphers & WPA_CIPHER_GCMP_256) { 2861 ret = os_snprintf(pos, end - pos, "%sGCMP-256", 2862 pos == start ? "" : delim); 2863 if (os_snprintf_error(end - pos, ret)) 2864 return -1; 2865 pos += ret; 2866 } 2867 if (ciphers & WPA_CIPHER_CCMP) { 2868 ret = os_snprintf(pos, end - pos, "%sCCMP", 2869 pos == start ? "" : delim); 2870 if (os_snprintf_error(end - pos, ret)) 2871 return -1; 2872 pos += ret; 2873 } 2874 if (ciphers & WPA_CIPHER_GCMP) { 2875 ret = os_snprintf(pos, end - pos, "%sGCMP", 2876 pos == start ? "" : delim); 2877 if (os_snprintf_error(end - pos, ret)) 2878 return -1; 2879 pos += ret; 2880 } 2881 if (ciphers & WPA_CIPHER_TKIP) { 2882 ret = os_snprintf(pos, end - pos, "%sTKIP", 2883 pos == start ? "" : delim); 2884 if (os_snprintf_error(end - pos, ret)) 2885 return -1; 2886 pos += ret; 2887 } 2888 if (ciphers & WPA_CIPHER_AES_128_CMAC) { 2889 ret = os_snprintf(pos, end - pos, "%sAES-128-CMAC", 2890 pos == start ? "" : delim); 2891 if (os_snprintf_error(end - pos, ret)) 2892 return -1; 2893 pos += ret; 2894 } 2895 if (ciphers & WPA_CIPHER_BIP_GMAC_128) { 2896 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-128", 2897 pos == start ? "" : delim); 2898 if (os_snprintf_error(end - pos, ret)) 2899 return -1; 2900 pos += ret; 2901 } 2902 if (ciphers & WPA_CIPHER_BIP_GMAC_256) { 2903 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-256", 2904 pos == start ? "" : delim); 2905 if (os_snprintf_error(end - pos, ret)) 2906 return -1; 2907 pos += ret; 2908 } 2909 if (ciphers & WPA_CIPHER_BIP_CMAC_256) { 2910 ret = os_snprintf(pos, end - pos, "%sBIP-CMAC-256", 2911 pos == start ? "" : delim); 2912 if (os_snprintf_error(end - pos, ret)) 2913 return -1; 2914 pos += ret; 2915 } 2916 if (ciphers & WPA_CIPHER_NONE) { 2917 ret = os_snprintf(pos, end - pos, "%sNONE", 2918 pos == start ? "" : delim); 2919 if (os_snprintf_error(end - pos, ret)) 2920 return -1; 2921 pos += ret; 2922 } 2923 2924 return pos - start; 2925 } 2926 2927 2928 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise) 2929 { 2930 int pairwise = 0; 2931 2932 /* Select group cipher based on the enabled pairwise cipher suites */ 2933 if (wpa & 1) 2934 pairwise |= wpa_pairwise; 2935 if (wpa & 2) 2936 pairwise |= rsn_pairwise; 2937 2938 if (pairwise & WPA_CIPHER_TKIP) 2939 return WPA_CIPHER_TKIP; 2940 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP) 2941 return WPA_CIPHER_GCMP; 2942 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP | 2943 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256) 2944 return WPA_CIPHER_GCMP_256; 2945 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP | 2946 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256) 2947 return WPA_CIPHER_CCMP_256; 2948 return WPA_CIPHER_CCMP; 2949 } 2950 2951 2952 #ifdef CONFIG_FILS 2953 int fils_domain_name_hash(const char *domain, u8 *hash) 2954 { 2955 char buf[255], *wpos = buf; 2956 const char *pos = domain; 2957 size_t len; 2958 const u8 *addr[1]; 2959 u8 mac[SHA256_MAC_LEN]; 2960 2961 for (len = 0; len < sizeof(buf) && *pos; len++) { 2962 if (isalpha(*pos) && isupper(*pos)) 2963 *wpos++ = tolower(*pos); 2964 else 2965 *wpos++ = *pos; 2966 pos++; 2967 } 2968 2969 addr[0] = (const u8 *) buf; 2970 if (sha256_vector(1, addr, &len, mac) < 0) 2971 return -1; 2972 os_memcpy(hash, mac, 2); 2973 return 0; 2974 } 2975 #endif /* CONFIG_FILS */ 2976 2977 2978 /** 2979 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 2980 * @pos: Pointer to the IE header 2981 * @end: Pointer to the end of the Key Data buffer 2982 * @ie: Pointer to parsed IE data 2983 */ 2984 static void wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 2985 struct wpa_eapol_ie_parse *ie) 2986 { 2987 unsigned int oui; 2988 2989 if (pos[1] < 4) { 2990 wpa_printf(MSG_MSGDUMP, 2991 "Too short vendor specific IE ignored (len=%u)", 2992 pos[1]); 2993 return; 2994 } 2995 2996 oui = WPA_GET_BE24(&pos[2]); 2997 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 2998 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 2999 ie->wmm = &pos[2]; 3000 ie->wmm_len = pos[1]; 3001 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 3002 ie->wmm, ie->wmm_len); 3003 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 3004 ie->wmm = &pos[2]; 3005 ie->wmm_len = pos[1]; 3006 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 3007 ie->wmm, ie->wmm_len); 3008 } 3009 } 3010 } 3011 3012 3013 /** 3014 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 3015 * @pos: Pointer to the IE header 3016 * @ie: Pointer to parsed IE data 3017 * Returns: 0 on success, 1 if end mark is found, 2 if KDE is not recognized 3018 */ 3019 static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie) 3020 { 3021 if (pos[1] == 0) 3022 return 1; 3023 3024 if (pos[1] >= 6 && 3025 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 3026 pos[2 + WPA_SELECTOR_LEN] == 1 && 3027 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 3028 ie->wpa_ie = pos; 3029 ie->wpa_ie_len = pos[1] + 2; 3030 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 3031 ie->wpa_ie, ie->wpa_ie_len); 3032 return 0; 3033 } 3034 3035 if (pos[1] >= 4 && WPA_GET_BE32(pos + 2) == OSEN_IE_VENDOR_TYPE) { 3036 ie->osen = pos; 3037 ie->osen_len = pos[1] + 2; 3038 return 0; 3039 } 3040 3041 if (pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 3042 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 3043 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 3044 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key", 3045 pos, pos[1] + 2); 3046 return 0; 3047 } 3048 3049 if (pos[1] >= RSN_SELECTOR_LEN + 2 && 3050 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_KEYID) { 3051 ie->key_id = pos + 2 + RSN_SELECTOR_LEN; 3052 wpa_hexdump(MSG_DEBUG, "WPA: KeyID in EAPOL-Key", 3053 pos, pos[1] + 2); 3054 return 0; 3055 } 3056 3057 if (pos[1] > RSN_SELECTOR_LEN + 2 && 3058 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) { 3059 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 3060 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 3061 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key", 3062 pos, pos[1] + 2); 3063 return 0; 3064 } 3065 3066 if (pos[1] > RSN_SELECTOR_LEN + 2 && 3067 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) { 3068 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 3069 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 3070 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", 3071 pos, pos[1] + 2); 3072 return 0; 3073 } 3074 3075 if (pos[1] > RSN_SELECTOR_LEN + 2 && 3076 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 3077 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 3078 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 3079 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 3080 pos, pos[1] + 2); 3081 return 0; 3082 } 3083 3084 if (pos[1] > RSN_SELECTOR_LEN + 2 && 3085 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_BIGTK) { 3086 ie->bigtk = pos + 2 + RSN_SELECTOR_LEN; 3087 ie->bigtk_len = pos[1] - RSN_SELECTOR_LEN; 3088 wpa_hexdump_key(MSG_DEBUG, "WPA: BIGTK in EAPOL-Key", 3089 pos, pos[1] + 2); 3090 return 0; 3091 } 3092 3093 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 3094 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 3095 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 3096 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 3097 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 3098 return 0; 3099 } 3100 3101 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 3102 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 3103 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 3104 wpa_hexdump(MSG_DEBUG, 3105 "WPA: IP Address Allocation in EAPOL-Key", 3106 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 3107 return 0; 3108 } 3109 3110 if (pos[1] > RSN_SELECTOR_LEN + 2 && 3111 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_OCI) { 3112 ie->oci = pos + 2 + RSN_SELECTOR_LEN; 3113 ie->oci_len = pos[1] - RSN_SELECTOR_LEN; 3114 wpa_hexdump(MSG_DEBUG, "WPA: OCI KDE in EAPOL-Key", 3115 pos, pos[1] + 2); 3116 return 0; 3117 } 3118 3119 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 3120 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_TRANSITION_DISABLE) { 3121 ie->transition_disable = pos + 2 + RSN_SELECTOR_LEN; 3122 ie->transition_disable_len = pos[1] - RSN_SELECTOR_LEN; 3123 wpa_hexdump(MSG_DEBUG, 3124 "WPA: Transition Disable KDE in EAPOL-Key", 3125 pos, pos[1] + 2); 3126 return 0; 3127 } 3128 3129 if (pos[1] >= RSN_SELECTOR_LEN + 2 && 3130 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_DPP) { 3131 ie->dpp_kde = pos + 2 + RSN_SELECTOR_LEN; 3132 ie->dpp_kde_len = pos[1] - RSN_SELECTOR_LEN; 3133 wpa_hexdump(MSG_DEBUG, "WPA: DPP KDE in EAPOL-Key", 3134 pos, pos[1] + 2); 3135 return 0; 3136 } 3137 3138 return 2; 3139 } 3140 3141 3142 /** 3143 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs 3144 * @buf: Pointer to the Key Data buffer 3145 * @len: Key Data Length 3146 * @ie: Pointer to parsed IE data 3147 * Returns: 0 on success, -1 on failure 3148 */ 3149 int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie) 3150 { 3151 const u8 *pos, *end; 3152 int ret = 0; 3153 3154 os_memset(ie, 0, sizeof(*ie)); 3155 for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) { 3156 if (pos[0] == 0xdd && 3157 ((pos == buf + len - 1) || pos[1] == 0)) { 3158 /* Ignore padding */ 3159 break; 3160 } 3161 if (2 + pos[1] > end - pos) { 3162 wpa_printf(MSG_DEBUG, 3163 "WPA: EAPOL-Key Key Data underflow (ie=%d len=%d pos=%d)", 3164 pos[0], pos[1], (int) (pos - buf)); 3165 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", buf, len); 3166 ret = -1; 3167 break; 3168 } 3169 if (*pos == WLAN_EID_RSN) { 3170 ie->rsn_ie = pos; 3171 ie->rsn_ie_len = pos[1] + 2; 3172 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 3173 ie->rsn_ie, ie->rsn_ie_len); 3174 } else if (*pos == WLAN_EID_RSNX) { 3175 ie->rsnxe = pos; 3176 ie->rsnxe_len = pos[1] + 2; 3177 wpa_hexdump(MSG_DEBUG, "WPA: RSNXE in EAPOL-Key", 3178 ie->rsnxe, ie->rsnxe_len); 3179 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) { 3180 ie->mdie = pos; 3181 ie->mdie_len = pos[1] + 2; 3182 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 3183 ie->mdie, ie->mdie_len); 3184 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) { 3185 ie->ftie = pos; 3186 ie->ftie_len = pos[1] + 2; 3187 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 3188 ie->ftie, ie->ftie_len); 3189 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 3190 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 3191 ie->reassoc_deadline = pos; 3192 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 3193 "in EAPOL-Key", 3194 ie->reassoc_deadline, pos[1] + 2); 3195 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 3196 ie->key_lifetime = pos; 3197 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 3198 "in EAPOL-Key", 3199 ie->key_lifetime, pos[1] + 2); 3200 } else { 3201 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 3202 "EAPOL-Key Key Data IE", 3203 pos, 2 + pos[1]); 3204 } 3205 } else if (*pos == WLAN_EID_LINK_ID) { 3206 if (pos[1] >= 18) { 3207 ie->lnkid = pos; 3208 ie->lnkid_len = pos[1] + 2; 3209 } 3210 } else if (*pos == WLAN_EID_EXT_CAPAB) { 3211 ie->ext_capab = pos; 3212 ie->ext_capab_len = pos[1] + 2; 3213 } else if (*pos == WLAN_EID_SUPP_RATES) { 3214 ie->supp_rates = pos; 3215 ie->supp_rates_len = pos[1] + 2; 3216 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 3217 ie->ext_supp_rates = pos; 3218 ie->ext_supp_rates_len = pos[1] + 2; 3219 } else if (*pos == WLAN_EID_HT_CAP && 3220 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { 3221 ie->ht_capabilities = pos + 2; 3222 } else if (*pos == WLAN_EID_VHT_AID) { 3223 if (pos[1] >= 2) 3224 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 3225 } else if (*pos == WLAN_EID_VHT_CAP && 3226 pos[1] >= sizeof(struct ieee80211_vht_capabilities)) 3227 { 3228 ie->vht_capabilities = pos + 2; 3229 } else if (*pos == WLAN_EID_EXTENSION && 3230 pos[1] >= 1 + IEEE80211_HE_CAPAB_MIN_LEN && 3231 pos[2] == WLAN_EID_EXT_HE_CAPABILITIES) { 3232 ie->he_capabilities = pos + 3; 3233 ie->he_capab_len = pos[1] - 1; 3234 } else if (*pos == WLAN_EID_EXTENSION && 3235 pos[1] >= 1 + 3236 sizeof(struct ieee80211_he_6ghz_band_cap) && 3237 pos[2] == WLAN_EID_EXT_HE_6GHZ_BAND_CAP) { 3238 ie->he_6ghz_capabilities = pos + 3; 3239 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { 3240 ie->qosinfo = pos[2]; 3241 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { 3242 ie->supp_channels = pos + 2; 3243 ie->supp_channels_len = pos[1]; 3244 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { 3245 /* 3246 * The value of the Length field of the Supported 3247 * Operating Classes element is between 2 and 253. 3248 * Silently skip invalid elements to avoid interop 3249 * issues when trying to use the value. 3250 */ 3251 if (pos[1] >= 2 && pos[1] <= 253) { 3252 ie->supp_oper_classes = pos + 2; 3253 ie->supp_oper_classes_len = pos[1]; 3254 } 3255 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 3256 ret = wpa_parse_generic(pos, ie); 3257 if (ret == 1) { 3258 /* end mark found */ 3259 ret = 0; 3260 break; 3261 } 3262 3263 if (ret == 2) { 3264 /* not a known KDE */ 3265 wpa_parse_vendor_specific(pos, end, ie); 3266 } 3267 3268 ret = 0; 3269 } else { 3270 wpa_hexdump(MSG_DEBUG, 3271 "WPA: Unrecognized EAPOL-Key Key Data IE", 3272 pos, 2 + pos[1]); 3273 } 3274 } 3275 3276 return ret; 3277 } 3278 3279 3280 #ifdef CONFIG_PASN 3281 3282 /* 3283 * wpa_pasn_build_auth_header - Add the MAC header and initialize Authentication 3284 * frame for PASN 3285 * 3286 * @buf: Buffer in which the header will be added 3287 * @bssid: The BSSID of the AP 3288 * @src: Source address 3289 * @dst: Destination address 3290 * @trans_seq: Authentication transaction sequence number 3291 * @status: Authentication status 3292 */ 3293 void wpa_pasn_build_auth_header(struct wpabuf *buf, const u8 *bssid, 3294 const u8 *src, const u8 *dst, 3295 u8 trans_seq, u16 status) 3296 { 3297 struct ieee80211_mgmt *auth; 3298 3299 wpa_printf(MSG_DEBUG, "PASN: Add authentication header. trans_seq=%u", 3300 trans_seq); 3301 3302 auth = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 3303 u.auth.variable)); 3304 3305 auth->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 3306 (WLAN_FC_STYPE_AUTH << 4)); 3307 3308 os_memcpy(auth->da, dst, ETH_ALEN); 3309 os_memcpy(auth->sa, src, ETH_ALEN); 3310 os_memcpy(auth->bssid, bssid, ETH_ALEN); 3311 auth->seq_ctrl = 0; 3312 3313 auth->u.auth.auth_alg = host_to_le16(WLAN_AUTH_PASN); 3314 auth->u.auth.auth_transaction = host_to_le16(trans_seq); 3315 auth->u.auth.status_code = host_to_le16(status); 3316 } 3317 3318 3319 /* 3320 * wpa_pasn_add_rsne - Add an RSNE for PASN authentication 3321 * @buf: Buffer in which the IE will be added 3322 * @pmkid: Optional PMKID. Can be NULL. 3323 * @akmp: Authentication and key management protocol 3324 * @cipher: The cipher suite 3325 */ 3326 int wpa_pasn_add_rsne(struct wpabuf *buf, const u8 *pmkid, int akmp, int cipher) 3327 { 3328 struct rsn_ie_hdr *hdr; 3329 u32 suite; 3330 u16 capab; 3331 u8 *pos; 3332 u8 rsne_len; 3333 3334 wpa_printf(MSG_DEBUG, "PASN: Add RSNE"); 3335 3336 rsne_len = sizeof(*hdr) + RSN_SELECTOR_LEN + 3337 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 3338 2 + RSN_SELECTOR_LEN + 2 + (pmkid ? PMKID_LEN : 0); 3339 3340 if (wpabuf_tailroom(buf) < rsne_len) 3341 return -1; 3342 hdr = wpabuf_put(buf, rsne_len); 3343 hdr->elem_id = WLAN_EID_RSN; 3344 hdr->len = rsne_len - 2; 3345 WPA_PUT_LE16(hdr->version, RSN_VERSION); 3346 pos = (u8 *) (hdr + 1); 3347 3348 /* Group addressed data is not allowed */ 3349 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); 3350 pos += RSN_SELECTOR_LEN; 3351 3352 /* Add the pairwise cipher */ 3353 WPA_PUT_LE16(pos, 1); 3354 pos += 2; 3355 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, cipher); 3356 RSN_SELECTOR_PUT(pos, suite); 3357 pos += RSN_SELECTOR_LEN; 3358 3359 /* Add the AKM suite */ 3360 WPA_PUT_LE16(pos, 1); 3361 pos += 2; 3362 3363 switch (akmp) { 3364 case WPA_KEY_MGMT_PASN: 3365 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PASN); 3366 break; 3367 #ifdef CONFIG_SAE 3368 case WPA_KEY_MGMT_SAE: 3369 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE); 3370 break; 3371 #endif /* CONFIG_SAE */ 3372 #ifdef CONFIG_FILS 3373 case WPA_KEY_MGMT_FILS_SHA256: 3374 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256); 3375 break; 3376 case WPA_KEY_MGMT_FILS_SHA384: 3377 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384); 3378 break; 3379 #endif /* CONFIG_FILS */ 3380 #ifdef CONFIG_IEEE80211R 3381 case WPA_KEY_MGMT_FT_PSK: 3382 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK); 3383 break; 3384 case WPA_KEY_MGMT_FT_IEEE8021X: 3385 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X); 3386 break; 3387 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 3388 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384); 3389 break; 3390 #endif /* CONFIG_IEEE80211R */ 3391 default: 3392 wpa_printf(MSG_ERROR, "PASN: Invalid AKMP=0x%x", akmp); 3393 return -1; 3394 } 3395 pos += RSN_SELECTOR_LEN; 3396 3397 /* RSN Capabilities: PASN mandates both MFP capable and required */ 3398 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR; 3399 WPA_PUT_LE16(pos, capab); 3400 pos += 2; 3401 3402 if (pmkid) { 3403 wpa_printf(MSG_DEBUG, "PASN: Adding PMKID"); 3404 3405 WPA_PUT_LE16(pos, 1); 3406 pos += 2; 3407 os_memcpy(pos, pmkid, PMKID_LEN); 3408 pos += PMKID_LEN; 3409 } else { 3410 WPA_PUT_LE16(pos, 0); 3411 pos += 2; 3412 } 3413 3414 /* Group addressed management is not allowed */ 3415 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); 3416 3417 return 0; 3418 } 3419 3420 3421 /* 3422 * wpa_pasn_add_parameter_ie - Add PASN Parameters IE for PASN authentication 3423 * @buf: Buffer in which the IE will be added 3424 * @pasn_group: Finite Cyclic Group ID for PASN authentication 3425 * @wrapped_data_format: Format of the data in the Wrapped Data IE 3426 * @pubkey: A buffer holding the local public key. Can be NULL 3427 * @compressed: In case pubkey is included, indicates if the public key is 3428 * compressed (only x coordinate is included) or not (both x and y 3429 * coordinates are included) 3430 * @comeback: A buffer holding the comeback token. Can be NULL 3431 * @after: If comeback is set, defined the comeback time in seconds. -1 to not 3432 * include the Comeback After field (frames from non-AP STA). 3433 */ 3434 void wpa_pasn_add_parameter_ie(struct wpabuf *buf, u16 pasn_group, 3435 u8 wrapped_data_format, 3436 const struct wpabuf *pubkey, bool compressed, 3437 const struct wpabuf *comeback, int after) 3438 { 3439 struct pasn_parameter_ie *params; 3440 3441 wpa_printf(MSG_DEBUG, "PASN: Add PASN Parameters element"); 3442 3443 params = wpabuf_put(buf, sizeof(*params)); 3444 3445 params->id = WLAN_EID_EXTENSION; 3446 params->len = sizeof(*params) - 2; 3447 params->id_ext = WLAN_EID_EXT_PASN_PARAMS; 3448 params->control = 0; 3449 params->wrapped_data_format = wrapped_data_format; 3450 3451 if (comeback) { 3452 wpa_printf(MSG_DEBUG, "PASN: Adding comeback data"); 3453 3454 /* 3455 * 2 octets for the 'after' field + 1 octet for the length + 3456 * actual cookie data 3457 */ 3458 if (after >= 0) 3459 params->len += 2; 3460 params->len += 1 + wpabuf_len(comeback); 3461 params->control |= WPA_PASN_CTRL_COMEBACK_INFO_PRESENT; 3462 3463 if (after >= 0) 3464 wpabuf_put_le16(buf, after); 3465 wpabuf_put_u8(buf, wpabuf_len(comeback)); 3466 wpabuf_put_buf(buf, comeback); 3467 } 3468 3469 if (pubkey) { 3470 wpa_printf(MSG_DEBUG, 3471 "PASN: Adding public key and group ID %u", 3472 pasn_group); 3473 3474 /* 3475 * 2 octets for the finite cyclic group + 2 octets public key 3476 * length + 1 octet for the compressed/uncompressed indication + 3477 * the actual key. 3478 */ 3479 params->len += 2 + 1 + 1 + wpabuf_len(pubkey); 3480 params->control |= WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT; 3481 3482 wpabuf_put_le16(buf, pasn_group); 3483 3484 /* 3485 * The first octet indicates whether the public key is 3486 * compressed, as defined in RFC 5480 section 2.2. 3487 */ 3488 wpabuf_put_u8(buf, wpabuf_len(pubkey) + 1); 3489 wpabuf_put_u8(buf, compressed ? WPA_PASN_PUBKEY_COMPRESSED_0 : 3490 WPA_PASN_PUBKEY_UNCOMPRESSED); 3491 3492 wpabuf_put_buf(buf, pubkey); 3493 } 3494 } 3495 3496 /* 3497 * wpa_pasn_add_wrapped_data - Add a Wrapped Data IE to PASN Authentication 3498 * frame. If needed, the Wrapped Data IE would be fragmented. 3499 * 3500 * @buf: Buffer in which the IE will be added 3501 * @wrapped_data_buf: Buffer holding the wrapped data 3502 */ 3503 int wpa_pasn_add_wrapped_data(struct wpabuf *buf, 3504 struct wpabuf *wrapped_data_buf) 3505 { 3506 const u8 *data; 3507 size_t data_len; 3508 u8 len; 3509 3510 if (!wrapped_data_buf) 3511 return 0; 3512 3513 wpa_printf(MSG_DEBUG, "PASN: Add wrapped data"); 3514 3515 data = wpabuf_head_u8(wrapped_data_buf); 3516 data_len = wpabuf_len(wrapped_data_buf); 3517 3518 /* nothing to add */ 3519 if (!data_len) 3520 return 0; 3521 3522 if (data_len <= 254) 3523 len = 1 + data_len; 3524 else 3525 len = 255; 3526 3527 if (wpabuf_tailroom(buf) < 3 + data_len) 3528 return -1; 3529 3530 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); 3531 wpabuf_put_u8(buf, len); 3532 wpabuf_put_u8(buf, WLAN_EID_EXT_WRAPPED_DATA); 3533 wpabuf_put_data(buf, data, len - 1); 3534 3535 data += len - 1; 3536 data_len -= len - 1; 3537 3538 while (data_len) { 3539 if (wpabuf_tailroom(buf) < 1 + data_len) 3540 return -1; 3541 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT); 3542 len = data_len > 255 ? 255 : data_len; 3543 wpabuf_put_u8(buf, len); 3544 wpabuf_put_data(buf, data, len); 3545 data += len; 3546 data_len -= len; 3547 } 3548 3549 return 0; 3550 } 3551 3552 3553 /* 3554 * wpa_pasn_validate_rsne - Validate PSAN specific data of RSNE 3555 * @data: Parsed representation of an RSNE 3556 * Returns -1 for invalid data; otherwise 0 3557 */ 3558 int wpa_pasn_validate_rsne(const struct wpa_ie_data *data) 3559 { 3560 u16 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR; 3561 3562 if (data->proto != WPA_PROTO_RSN) 3563 return -1; 3564 3565 if ((data->capabilities & capab) != capab) { 3566 wpa_printf(MSG_DEBUG, "PASN: Invalid RSNE capabilities"); 3567 return -1; 3568 } 3569 3570 if (!data->has_group || data->group_cipher != WPA_CIPHER_GTK_NOT_USED) { 3571 wpa_printf(MSG_DEBUG, "PASN: Invalid group data cipher"); 3572 return -1; 3573 } 3574 3575 if (!data->has_pairwise || !data->pairwise_cipher || 3576 (data->pairwise_cipher & (data->pairwise_cipher - 1))) { 3577 wpa_printf(MSG_DEBUG, "PASN: No valid pairwise suite"); 3578 return -1; 3579 } 3580 3581 switch (data->key_mgmt) { 3582 #ifdef CONFIG_SAE 3583 case WPA_KEY_MGMT_SAE: 3584 /* fall through */ 3585 #endif /* CONFIG_SAE */ 3586 #ifdef CONFIG_FILS 3587 case WPA_KEY_MGMT_FILS_SHA256: 3588 case WPA_KEY_MGMT_FILS_SHA384: 3589 /* fall through */ 3590 #endif /* CONFIG_FILS */ 3591 #ifdef CONFIG_IEEE80211R 3592 case WPA_KEY_MGMT_FT_PSK: 3593 case WPA_KEY_MGMT_FT_IEEE8021X: 3594 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 3595 /* fall through */ 3596 #endif /* CONFIG_IEEE80211R */ 3597 case WPA_KEY_MGMT_PASN: 3598 break; 3599 default: 3600 wpa_printf(MSG_ERROR, "PASN: invalid key_mgmt: 0x%0x", 3601 data->key_mgmt); 3602 return -1; 3603 } 3604 3605 if (data->mgmt_group_cipher != WPA_CIPHER_GTK_NOT_USED) { 3606 wpa_printf(MSG_DEBUG, "PASN: Invalid group mgmt cipher"); 3607 return -1; 3608 } 3609 3610 if (data->num_pmkid > 1) { 3611 wpa_printf(MSG_DEBUG, "PASN: Invalid number of PMKIDs"); 3612 return -1; 3613 } 3614 3615 return 0; 3616 } 3617 3618 3619 /* 3620 * wpa_pasn_parse_parameter_ie - Validates PASN Parameters IE 3621 * @data: Pointer to the PASN Parameters IE (starting with the EID). 3622 * @len: Length of the data in the PASN Parameters IE 3623 * @from_ap: Whether this was received from an AP 3624 * @pasn_params: On successful return would hold the parsed PASN parameters. 3625 * Returns: -1 for invalid data; otherwise 0 3626 * 3627 * Note: On successful return, the pointers in &pasn_params point to the data in 3628 * the IE and are not locally allocated (so they should not be freed etc.). 3629 */ 3630 int wpa_pasn_parse_parameter_ie(const u8 *data, u8 len, bool from_ap, 3631 struct wpa_pasn_params_data *pasn_params) 3632 { 3633 struct pasn_parameter_ie *params = (struct pasn_parameter_ie *) data; 3634 const u8 *pos = (const u8 *) (params + 1); 3635 3636 if (!pasn_params) { 3637 wpa_printf(MSG_DEBUG, "PASN: Invalid params"); 3638 return -1; 3639 } 3640 3641 if (!params || ((size_t) (params->len + 2) < sizeof(*params)) || 3642 len < sizeof(*params) || params->len + 2 != len) { 3643 wpa_printf(MSG_DEBUG, 3644 "PASN: Invalid parameters IE. len=(%u, %u)", 3645 params ? params->len : 0, len); 3646 return -1; 3647 } 3648 3649 os_memset(pasn_params, 0, sizeof(*pasn_params)); 3650 3651 switch (params->wrapped_data_format) { 3652 case WPA_PASN_WRAPPED_DATA_NO: 3653 case WPA_PASN_WRAPPED_DATA_SAE: 3654 case WPA_PASN_WRAPPED_DATA_FILS_SK: 3655 case WPA_PASN_WRAPPED_DATA_FT: 3656 break; 3657 default: 3658 wpa_printf(MSG_DEBUG, "PASN: Invalid wrapped data format"); 3659 return -1; 3660 } 3661 3662 pasn_params->wrapped_data_format = params->wrapped_data_format; 3663 3664 len -= sizeof(*params); 3665 3666 if (params->control & WPA_PASN_CTRL_COMEBACK_INFO_PRESENT) { 3667 if (from_ap) { 3668 if (len < 2) { 3669 wpa_printf(MSG_DEBUG, 3670 "PASN: Invalid Parameters IE: Truncated Comeback After"); 3671 return -1; 3672 } 3673 pasn_params->after = WPA_GET_LE16(pos); 3674 pos += 2; 3675 len -= 2; 3676 } 3677 3678 if (len < 1 || len < 1 + *pos) { 3679 wpa_printf(MSG_DEBUG, 3680 "PASN: Invalid Parameters IE: comeback len"); 3681 return -1; 3682 } 3683 3684 pasn_params->comeback_len = *pos++; 3685 len--; 3686 pasn_params->comeback = pos; 3687 len -= pasn_params->comeback_len; 3688 pos += pasn_params->comeback_len; 3689 } 3690 3691 if (params->control & WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT) { 3692 if (len < 3 || len < 3 + pos[2]) { 3693 wpa_printf(MSG_DEBUG, 3694 "PASN: Invalid Parameters IE: group and key"); 3695 return -1; 3696 } 3697 3698 pasn_params->group = WPA_GET_LE16(pos); 3699 pos += 2; 3700 len -= 2; 3701 pasn_params->pubkey_len = *pos++; 3702 len--; 3703 pasn_params->pubkey = pos; 3704 len -= pasn_params->pubkey_len; 3705 pos += pasn_params->pubkey_len; 3706 } 3707 3708 if (len) { 3709 wpa_printf(MSG_DEBUG, 3710 "PASN: Invalid Parameters IE. Bytes left=%u", len); 3711 return -1; 3712 } 3713 3714 return 0; 3715 } 3716 3717 3718 void wpa_pasn_add_rsnxe(struct wpabuf *buf, u16 capab) 3719 { 3720 size_t flen; 3721 3722 flen = (capab & 0xff00) ? 2 : 1; 3723 if (!capab) 3724 return; /* no supported extended RSN capabilities */ 3725 if (wpabuf_tailroom(buf) < 2 + flen) 3726 return; 3727 capab |= flen - 1; /* bit 0-3 = Field length (n - 1) */ 3728 3729 wpabuf_put_u8(buf, WLAN_EID_RSNX); 3730 wpabuf_put_u8(buf, flen); 3731 wpabuf_put_u8(buf, capab & 0x00ff); 3732 capab >>= 8; 3733 if (capab) 3734 wpabuf_put_u8(buf, capab); 3735 } 3736 3737 #endif /* CONFIG_PASN */ 3738