1 /* 2 * WPA/RSN - Shared functions for supplicant and authenticator 3 * Copyright (c) 2002-2018, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "crypto/md5.h" 13 #include "crypto/sha1.h" 14 #include "crypto/sha256.h" 15 #include "crypto/sha384.h" 16 #include "crypto/sha512.h" 17 #include "crypto/aes_wrap.h" 18 #include "crypto/crypto.h" 19 #include "ieee802_11_defs.h" 20 #include "ieee802_11_common.h" 21 #include "defs.h" 22 #include "wpa_common.h" 23 24 25 static unsigned int wpa_kck_len(int akmp, size_t pmk_len) 26 { 27 switch (akmp) { 28 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 29 case WPA_KEY_MGMT_IEEE8021X_SHA384: 30 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 31 return 24; 32 case WPA_KEY_MGMT_FILS_SHA256: 33 case WPA_KEY_MGMT_FT_FILS_SHA256: 34 case WPA_KEY_MGMT_FILS_SHA384: 35 case WPA_KEY_MGMT_FT_FILS_SHA384: 36 return 0; 37 case WPA_KEY_MGMT_DPP: 38 return pmk_len / 2; 39 case WPA_KEY_MGMT_OWE: 40 return pmk_len / 2; 41 case WPA_KEY_MGMT_SAE_EXT_KEY: 42 case WPA_KEY_MGMT_FT_SAE_EXT_KEY: 43 return pmk_len / 2; 44 default: 45 return 16; 46 } 47 } 48 49 50 #ifdef CONFIG_IEEE80211R 51 static unsigned int wpa_kck2_len(int akmp) 52 { 53 switch (akmp) { 54 case WPA_KEY_MGMT_FT_FILS_SHA256: 55 return 16; 56 case WPA_KEY_MGMT_FT_FILS_SHA384: 57 return 24; 58 default: 59 return 0; 60 } 61 } 62 #endif /* CONFIG_IEEE80211R */ 63 64 65 static unsigned int wpa_kek_len(int akmp, size_t pmk_len) 66 { 67 switch (akmp) { 68 case WPA_KEY_MGMT_FILS_SHA384: 69 case WPA_KEY_MGMT_FT_FILS_SHA384: 70 return 64; 71 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 72 case WPA_KEY_MGMT_FILS_SHA256: 73 case WPA_KEY_MGMT_FT_FILS_SHA256: 74 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 75 case WPA_KEY_MGMT_IEEE8021X_SHA384: 76 return 32; 77 case WPA_KEY_MGMT_DPP: 78 return pmk_len <= 32 ? 16 : 32; 79 case WPA_KEY_MGMT_OWE: 80 return pmk_len <= 32 ? 16 : 32; 81 case WPA_KEY_MGMT_SAE_EXT_KEY: 82 case WPA_KEY_MGMT_FT_SAE_EXT_KEY: 83 return pmk_len <= 32 ? 16 : 32; 84 default: 85 return 16; 86 } 87 } 88 89 90 #ifdef CONFIG_IEEE80211R 91 static unsigned int wpa_kek2_len(int akmp) 92 { 93 switch (akmp) { 94 case WPA_KEY_MGMT_FT_FILS_SHA256: 95 return 16; 96 case WPA_KEY_MGMT_FT_FILS_SHA384: 97 return 32; 98 default: 99 return 0; 100 } 101 } 102 #endif /* CONFIG_IEEE80211R */ 103 104 105 unsigned int wpa_mic_len(int akmp, size_t pmk_len) 106 { 107 switch (akmp) { 108 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 109 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 110 case WPA_KEY_MGMT_IEEE8021X_SHA384: 111 return 24; 112 case WPA_KEY_MGMT_FILS_SHA256: 113 case WPA_KEY_MGMT_FILS_SHA384: 114 case WPA_KEY_MGMT_FT_FILS_SHA256: 115 case WPA_KEY_MGMT_FT_FILS_SHA384: 116 return 0; 117 case WPA_KEY_MGMT_DPP: 118 return pmk_len / 2; 119 case WPA_KEY_MGMT_OWE: 120 return pmk_len / 2; 121 case WPA_KEY_MGMT_SAE_EXT_KEY: 122 case WPA_KEY_MGMT_FT_SAE_EXT_KEY: 123 return pmk_len / 2; 124 default: 125 return 16; 126 } 127 } 128 129 130 /** 131 * wpa_use_akm_defined - Is AKM-defined Key Descriptor Version used 132 * @akmp: WPA_KEY_MGMT_* used in key derivation 133 * Returns: 1 if AKM-defined Key Descriptor Version is used; 0 otherwise 134 */ 135 int wpa_use_akm_defined(int akmp) 136 { 137 return akmp == WPA_KEY_MGMT_OSEN || 138 akmp == WPA_KEY_MGMT_OWE || 139 akmp == WPA_KEY_MGMT_DPP || 140 akmp == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 || 141 akmp == WPA_KEY_MGMT_IEEE8021X_SHA384 || 142 wpa_key_mgmt_sae(akmp) || 143 wpa_key_mgmt_suite_b(akmp) || 144 wpa_key_mgmt_fils(akmp); 145 } 146 147 148 /** 149 * wpa_use_cmac - Is CMAC integrity algorithm used for EAPOL-Key MIC 150 * @akmp: WPA_KEY_MGMT_* used in key derivation 151 * Returns: 1 if CMAC is used; 0 otherwise 152 */ 153 int wpa_use_cmac(int akmp) 154 { 155 return akmp == WPA_KEY_MGMT_OSEN || 156 akmp == WPA_KEY_MGMT_OWE || 157 akmp == WPA_KEY_MGMT_DPP || 158 wpa_key_mgmt_ft(akmp) || 159 wpa_key_mgmt_sha256(akmp) || 160 (wpa_key_mgmt_sae(akmp) && 161 !wpa_key_mgmt_sae_ext_key(akmp)) || 162 wpa_key_mgmt_suite_b(akmp); 163 } 164 165 166 /** 167 * wpa_use_aes_key_wrap - Is AES Keywrap algorithm used for EAPOL-Key Key Data 168 * @akmp: WPA_KEY_MGMT_* used in key derivation 169 * Returns: 1 if AES Keywrap is used; 0 otherwise 170 * 171 * Note: AKM 00-0F-AC:1 and 00-0F-AC:2 have special rules for selecting whether 172 * to use AES Keywrap based on the negotiated pairwise cipher. This function 173 * does not cover those special cases. 174 */ 175 int wpa_use_aes_key_wrap(int akmp) 176 { 177 return akmp == WPA_KEY_MGMT_OSEN || 178 akmp == WPA_KEY_MGMT_OWE || 179 akmp == WPA_KEY_MGMT_DPP || 180 akmp == WPA_KEY_MGMT_IEEE8021X_SHA384 || 181 wpa_key_mgmt_ft(akmp) || 182 wpa_key_mgmt_sha256(akmp) || 183 wpa_key_mgmt_sae(akmp) || 184 wpa_key_mgmt_suite_b(akmp); 185 } 186 187 188 /** 189 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC 190 * @key: EAPOL-Key Key Confirmation Key (KCK) 191 * @key_len: KCK length in octets 192 * @akmp: WPA_KEY_MGMT_* used in key derivation 193 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*) 194 * @buf: Pointer to the beginning of the EAPOL header (version field) 195 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame) 196 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written 197 * Returns: 0 on success, -1 on failure 198 * 199 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has 200 * to be cleared (all zeroes) when calling this function. 201 * 202 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the 203 * description of the Key MIC calculation. It includes packet data from the 204 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change 205 * happened during final editing of the standard and the correct behavior is 206 * defined in the last draft (IEEE 802.11i/D10). 207 */ 208 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver, 209 const u8 *buf, size_t len, u8 *mic) 210 { 211 u8 hash[SHA512_MAC_LEN]; 212 213 if (key_len == 0) { 214 wpa_printf(MSG_DEBUG, 215 "WPA: KCK not set - cannot calculate MIC"); 216 return -1; 217 } 218 219 switch (ver) { 220 #ifndef CONFIG_FIPS 221 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4: 222 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-MD5"); 223 return hmac_md5(key, key_len, buf, len, mic); 224 #endif /* CONFIG_FIPS */ 225 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES: 226 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA1"); 227 if (hmac_sha1(key, key_len, buf, len, hash)) 228 return -1; 229 os_memcpy(mic, hash, MD5_MAC_LEN); 230 break; 231 case WPA_KEY_INFO_TYPE_AES_128_CMAC: 232 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC"); 233 return omac1_aes_128(key, buf, len, mic); 234 case WPA_KEY_INFO_TYPE_AKM_DEFINED: 235 switch (akmp) { 236 #ifdef CONFIG_SAE 237 case WPA_KEY_MGMT_SAE: 238 case WPA_KEY_MGMT_FT_SAE: 239 wpa_printf(MSG_DEBUG, 240 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - SAE)"); 241 return omac1_aes_128(key, buf, len, mic); 242 case WPA_KEY_MGMT_SAE_EXT_KEY: 243 case WPA_KEY_MGMT_FT_SAE_EXT_KEY: 244 wpa_printf(MSG_DEBUG, 245 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - SAE-EXT-KEY)", 246 (unsigned int) key_len * 8 * 2); 247 if (key_len == 128 / 8) { 248 if (hmac_sha256(key, key_len, buf, len, hash)) 249 return -1; 250 #ifdef CONFIG_SHA384 251 } else if (key_len == 192 / 8) { 252 if (hmac_sha384(key, key_len, buf, len, hash)) 253 return -1; 254 #endif /* CONFIG_SHA384 */ 255 #ifdef CONFIG_SHA512 256 } else if (key_len == 256 / 8) { 257 if (hmac_sha512(key, key_len, buf, len, hash)) 258 return -1; 259 #endif /* CONFIG_SHA512 */ 260 } else { 261 wpa_printf(MSG_INFO, 262 "SAE: Unsupported KCK length: %u", 263 (unsigned int) key_len); 264 return -1; 265 } 266 os_memcpy(mic, hash, key_len); 267 break; 268 #endif /* CONFIG_SAE */ 269 #ifdef CONFIG_HS20 270 case WPA_KEY_MGMT_OSEN: 271 wpa_printf(MSG_DEBUG, 272 "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - OSEN)"); 273 return omac1_aes_128(key, buf, len, mic); 274 #endif /* CONFIG_HS20 */ 275 #ifdef CONFIG_SUITEB 276 case WPA_KEY_MGMT_IEEE8021X_SUITE_B: 277 wpa_printf(MSG_DEBUG, 278 "WPA: EAPOL-Key MIC using HMAC-SHA256 (AKM-defined - Suite B)"); 279 if (hmac_sha256(key, key_len, buf, len, hash)) 280 return -1; 281 os_memcpy(mic, hash, MD5_MAC_LEN); 282 break; 283 #endif /* CONFIG_SUITEB */ 284 #ifdef CONFIG_SUITEB192 285 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 286 wpa_printf(MSG_DEBUG, 287 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - Suite B 192-bit)"); 288 if (hmac_sha384(key, key_len, buf, len, hash)) 289 return -1; 290 os_memcpy(mic, hash, 24); 291 break; 292 #endif /* CONFIG_SUITEB192 */ 293 #ifdef CONFIG_OWE 294 case WPA_KEY_MGMT_OWE: 295 wpa_printf(MSG_DEBUG, 296 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - OWE)", 297 (unsigned int) key_len * 8 * 2); 298 if (key_len == 128 / 8) { 299 if (hmac_sha256(key, key_len, buf, len, hash)) 300 return -1; 301 } else if (key_len == 192 / 8) { 302 if (hmac_sha384(key, key_len, buf, len, hash)) 303 return -1; 304 } else if (key_len == 256 / 8) { 305 if (hmac_sha512(key, key_len, buf, len, hash)) 306 return -1; 307 } else { 308 wpa_printf(MSG_INFO, 309 "OWE: Unsupported KCK length: %u", 310 (unsigned int) key_len); 311 return -1; 312 } 313 os_memcpy(mic, hash, key_len); 314 break; 315 #endif /* CONFIG_OWE */ 316 #ifdef CONFIG_DPP 317 case WPA_KEY_MGMT_DPP: 318 wpa_printf(MSG_DEBUG, 319 "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - DPP)", 320 (unsigned int) key_len * 8 * 2); 321 if (key_len == 128 / 8) { 322 if (hmac_sha256(key, key_len, buf, len, hash)) 323 return -1; 324 } else if (key_len == 192 / 8) { 325 if (hmac_sha384(key, key_len, buf, len, hash)) 326 return -1; 327 } else if (key_len == 256 / 8) { 328 if (hmac_sha512(key, key_len, buf, len, hash)) 329 return -1; 330 } else { 331 wpa_printf(MSG_INFO, 332 "DPP: Unsupported KCK length: %u", 333 (unsigned int) key_len); 334 return -1; 335 } 336 os_memcpy(mic, hash, key_len); 337 break; 338 #endif /* CONFIG_DPP */ 339 #ifdef CONFIG_SHA384 340 case WPA_KEY_MGMT_IEEE8021X_SHA384: 341 #ifdef CONFIG_IEEE80211R 342 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 343 #endif /* CONFIG_IEEE80211R */ 344 wpa_printf(MSG_DEBUG, 345 "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - 802.1X SHA384)"); 346 if (hmac_sha384(key, key_len, buf, len, hash)) 347 return -1; 348 os_memcpy(mic, hash, 24); 349 break; 350 #endif /* CONFIG_SHA384 */ 351 default: 352 wpa_printf(MSG_DEBUG, 353 "WPA: EAPOL-Key MIC algorithm not known (AKM-defined - akmp=0x%x)", 354 akmp); 355 return -1; 356 } 357 break; 358 default: 359 wpa_printf(MSG_DEBUG, 360 "WPA: EAPOL-Key MIC algorithm not known (ver=%d)", 361 ver); 362 return -1; 363 } 364 365 return 0; 366 } 367 368 369 /** 370 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces 371 * @pmk: Pairwise master key 372 * @pmk_len: Length of PMK 373 * @label: Label to use in derivation 374 * @addr1: AA or SA 375 * @addr2: SA or AA 376 * @nonce1: ANonce or SNonce 377 * @nonce2: SNonce or ANonce 378 * @ptk: Buffer for pairwise transient key 379 * @akmp: Negotiated AKM 380 * @cipher: Negotiated pairwise cipher 381 * @kdk_len: The length in octets that should be derived for KDK 382 * Returns: 0 on success, -1 on failure 383 * 384 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy 385 * PTK = PRF-X(PMK, "Pairwise key expansion", 386 * Min(AA, SA) || Max(AA, SA) || 387 * Min(ANonce, SNonce) || Max(ANonce, SNonce) 388 * [ || Z.x ]) 389 * 390 * The optional Z.x component is used only with DPP and that part is not defined 391 * in IEEE 802.11. 392 */ 393 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label, 394 const u8 *addr1, const u8 *addr2, 395 const u8 *nonce1, const u8 *nonce2, 396 struct wpa_ptk *ptk, int akmp, int cipher, 397 const u8 *z, size_t z_len, size_t kdk_len) 398 { 399 #define MAX_Z_LEN 66 /* with NIST P-521 */ 400 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN]; 401 size_t data_len = 2 * ETH_ALEN + 2 * WPA_NONCE_LEN; 402 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + 403 WPA_KDK_MAX_LEN]; 404 size_t ptk_len; 405 #ifdef CONFIG_OWE 406 int owe_ptk_workaround = 0; 407 408 if (akmp == (WPA_KEY_MGMT_OWE | WPA_KEY_MGMT_PSK_SHA256)) { 409 owe_ptk_workaround = 1; 410 akmp = WPA_KEY_MGMT_OWE; 411 } 412 #endif /* CONFIG_OWE */ 413 414 if (pmk_len == 0) { 415 wpa_printf(MSG_ERROR, "WPA: No PMK set for PTK derivation"); 416 return -1; 417 } 418 419 if (z_len > MAX_Z_LEN) 420 return -1; 421 422 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) { 423 os_memcpy(data, addr1, ETH_ALEN); 424 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN); 425 } else { 426 os_memcpy(data, addr2, ETH_ALEN); 427 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN); 428 } 429 430 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) { 431 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN); 432 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2, 433 WPA_NONCE_LEN); 434 } else { 435 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN); 436 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1, 437 WPA_NONCE_LEN); 438 } 439 440 if (z && z_len) { 441 os_memcpy(data + 2 * ETH_ALEN + 2 * WPA_NONCE_LEN, z, z_len); 442 data_len += z_len; 443 } 444 445 if (kdk_len > WPA_KDK_MAX_LEN) { 446 wpa_printf(MSG_ERROR, 447 "WPA: KDK len=%zu exceeds max supported len", 448 kdk_len); 449 return -1; 450 } 451 452 ptk->kck_len = wpa_kck_len(akmp, pmk_len); 453 ptk->kek_len = wpa_kek_len(akmp, pmk_len); 454 ptk->tk_len = wpa_cipher_key_len(cipher); 455 ptk->kdk_len = kdk_len; 456 if (ptk->tk_len == 0) { 457 wpa_printf(MSG_ERROR, 458 "WPA: Unsupported cipher (0x%x) used in PTK derivation", 459 cipher); 460 return -1; 461 } 462 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + ptk->kdk_len; 463 464 if (wpa_key_mgmt_sha384(akmp)) { 465 #ifdef CONFIG_SHA384 466 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); 467 if (sha384_prf(pmk, pmk_len, label, data, data_len, 468 tmp, ptk_len) < 0) 469 return -1; 470 #else /* CONFIG_SHA384 */ 471 return -1; 472 #endif /* CONFIG_SHA384 */ 473 } else if (wpa_key_mgmt_sha256(akmp)) { 474 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); 475 if (sha256_prf(pmk, pmk_len, label, data, data_len, 476 tmp, ptk_len) < 0) 477 return -1; 478 #ifdef CONFIG_OWE 479 } else if (akmp == WPA_KEY_MGMT_OWE && (pmk_len == 32 || 480 owe_ptk_workaround)) { 481 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); 482 if (sha256_prf(pmk, pmk_len, label, data, data_len, 483 tmp, ptk_len) < 0) 484 return -1; 485 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 48) { 486 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); 487 if (sha384_prf(pmk, pmk_len, label, data, data_len, 488 tmp, ptk_len) < 0) 489 return -1; 490 } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 64) { 491 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)"); 492 if (sha512_prf(pmk, pmk_len, label, data, data_len, 493 tmp, ptk_len) < 0) 494 return -1; 495 } else if (akmp == WPA_KEY_MGMT_OWE) { 496 wpa_printf(MSG_INFO, "OWE: Unknown PMK length %u", 497 (unsigned int) pmk_len); 498 return -1; 499 #endif /* CONFIG_OWE */ 500 #ifdef CONFIG_DPP 501 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 32) { 502 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); 503 if (sha256_prf(pmk, pmk_len, label, data, data_len, 504 tmp, ptk_len) < 0) 505 return -1; 506 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 48) { 507 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); 508 if (sha384_prf(pmk, pmk_len, label, data, data_len, 509 tmp, ptk_len) < 0) 510 return -1; 511 } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 64) { 512 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)"); 513 if (sha512_prf(pmk, pmk_len, label, data, data_len, 514 tmp, ptk_len) < 0) 515 return -1; 516 } else if (akmp == WPA_KEY_MGMT_DPP) { 517 wpa_printf(MSG_INFO, "DPP: Unknown PMK length %u", 518 (unsigned int) pmk_len); 519 return -1; 520 #endif /* CONFIG_DPP */ 521 #ifdef CONFIG_SAE 522 } else if (wpa_key_mgmt_sae_ext_key(akmp)) { 523 if (pmk_len == 32) { 524 wpa_printf(MSG_DEBUG, 525 "SAE: PTK derivation using PRF(SHA256)"); 526 if (sha256_prf(pmk, pmk_len, label, data, data_len, 527 tmp, ptk_len) < 0) 528 return -1; 529 #ifdef CONFIG_SHA384 530 } else if (pmk_len == 48) { 531 wpa_printf(MSG_DEBUG, 532 "SAE: PTK derivation using PRF(SHA384)"); 533 if (sha384_prf(pmk, pmk_len, label, data, data_len, 534 tmp, ptk_len) < 0) 535 return -1; 536 #endif /* CONFIG_SHA384 */ 537 #ifdef CONFIG_SHA512 538 } else if (pmk_len == 64) { 539 wpa_printf(MSG_DEBUG, 540 "SAE: PTK derivation using PRF(SHA512)"); 541 if (sha512_prf(pmk, pmk_len, label, data, data_len, 542 tmp, ptk_len) < 0) 543 return -1; 544 #endif /* CONFIG_SHA512 */ 545 } else { 546 wpa_printf(MSG_INFO, "SAE: Unknown PMK length %u", 547 (unsigned int) pmk_len); 548 return -1; 549 } 550 #endif /* CONFIG_SAE */ 551 } else { 552 wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA1)"); 553 if (sha1_prf(pmk, pmk_len, label, data, data_len, tmp, 554 ptk_len) < 0) 555 return -1; 556 } 557 558 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR, 559 MAC2STR(addr1), MAC2STR(addr2)); 560 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN); 561 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN); 562 if (z && z_len) 563 wpa_hexdump_key(MSG_DEBUG, "WPA: Z.x", z, z_len); 564 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len); 565 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len); 566 567 os_memcpy(ptk->kck, tmp, ptk->kck_len); 568 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len); 569 570 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len); 571 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); 572 573 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len); 574 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len); 575 576 if (kdk_len) { 577 os_memcpy(ptk->kdk, tmp + ptk->kck_len + ptk->kek_len + 578 ptk->tk_len, ptk->kdk_len); 579 wpa_hexdump_key(MSG_DEBUG, "WPA: KDK", ptk->kdk, ptk->kdk_len); 580 } 581 582 ptk->kek2_len = 0; 583 ptk->kck2_len = 0; 584 585 os_memset(tmp, 0, sizeof(tmp)); 586 os_memset(data, 0, data_len); 587 return 0; 588 } 589 590 #ifdef CONFIG_FILS 591 592 int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len, 593 const u8 *snonce, const u8 *anonce, const u8 *dh_ss, 594 size_t dh_ss_len, u8 *pmk, size_t *pmk_len) 595 { 596 u8 nonces[2 * FILS_NONCE_LEN]; 597 const u8 *addr[2]; 598 size_t len[2]; 599 size_t num_elem; 600 int res; 601 602 /* PMK = HMAC-Hash(SNonce || ANonce, rMSK [ || DHss ]) */ 603 wpa_printf(MSG_DEBUG, "FILS: rMSK to PMK derivation"); 604 605 if (wpa_key_mgmt_sha384(akmp)) 606 *pmk_len = SHA384_MAC_LEN; 607 else if (wpa_key_mgmt_sha256(akmp)) 608 *pmk_len = SHA256_MAC_LEN; 609 else 610 return -1; 611 612 wpa_hexdump_key(MSG_DEBUG, "FILS: rMSK", rmsk, rmsk_len); 613 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); 614 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); 615 wpa_hexdump(MSG_DEBUG, "FILS: DHss", dh_ss, dh_ss_len); 616 617 os_memcpy(nonces, snonce, FILS_NONCE_LEN); 618 os_memcpy(&nonces[FILS_NONCE_LEN], anonce, FILS_NONCE_LEN); 619 addr[0] = rmsk; 620 len[0] = rmsk_len; 621 num_elem = 1; 622 if (dh_ss) { 623 addr[1] = dh_ss; 624 len[1] = dh_ss_len; 625 num_elem++; 626 } 627 if (wpa_key_mgmt_sha384(akmp)) 628 res = hmac_sha384_vector(nonces, 2 * FILS_NONCE_LEN, num_elem, 629 addr, len, pmk); 630 else 631 res = hmac_sha256_vector(nonces, 2 * FILS_NONCE_LEN, num_elem, 632 addr, len, pmk); 633 if (res == 0) 634 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, *pmk_len); 635 else 636 *pmk_len = 0; 637 return res; 638 } 639 640 641 int fils_pmkid_erp(int akmp, const u8 *reauth, size_t reauth_len, 642 u8 *pmkid) 643 { 644 const u8 *addr[1]; 645 size_t len[1]; 646 u8 hash[SHA384_MAC_LEN]; 647 int res; 648 649 /* PMKID = Truncate-128(Hash(EAP-Initiate/Reauth)) */ 650 addr[0] = reauth; 651 len[0] = reauth_len; 652 if (wpa_key_mgmt_sha384(akmp)) 653 res = sha384_vector(1, addr, len, hash); 654 else if (wpa_key_mgmt_sha256(akmp)) 655 res = sha256_vector(1, addr, len, hash); 656 else 657 return -1; 658 if (res) 659 return res; 660 os_memcpy(pmkid, hash, PMKID_LEN); 661 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN); 662 return 0; 663 } 664 665 666 int fils_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const u8 *spa, const u8 *aa, 667 const u8 *snonce, const u8 *anonce, const u8 *dhss, 668 size_t dhss_len, struct wpa_ptk *ptk, 669 u8 *ick, size_t *ick_len, int akmp, int cipher, 670 u8 *fils_ft, size_t *fils_ft_len, size_t kdk_len) 671 { 672 u8 *data, *pos; 673 size_t data_len; 674 u8 tmp[FILS_ICK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + 675 FILS_FT_MAX_LEN + WPA_KDK_MAX_LEN]; 676 size_t key_data_len; 677 const char *label = "FILS PTK Derivation"; 678 int ret = -1; 679 size_t offset; 680 681 /* 682 * FILS-Key-Data = PRF-X(PMK, "FILS PTK Derivation", 683 * SPA || AA || SNonce || ANonce [ || DHss ]) 684 * ICK = L(FILS-Key-Data, 0, ICK_bits) 685 * KEK = L(FILS-Key-Data, ICK_bits, KEK_bits) 686 * TK = L(FILS-Key-Data, ICK_bits + KEK_bits, TK_bits) 687 * If doing FT initial mobility domain association: 688 * FILS-FT = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits, 689 * FILS-FT_bits) 690 * When a KDK is derived: 691 * KDK = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits + FILS-FT_bits, 692 * KDK_bits) 693 */ 694 data_len = 2 * ETH_ALEN + 2 * FILS_NONCE_LEN + dhss_len; 695 data = os_malloc(data_len); 696 if (!data) 697 goto err; 698 pos = data; 699 os_memcpy(pos, spa, ETH_ALEN); 700 pos += ETH_ALEN; 701 os_memcpy(pos, aa, ETH_ALEN); 702 pos += ETH_ALEN; 703 os_memcpy(pos, snonce, FILS_NONCE_LEN); 704 pos += FILS_NONCE_LEN; 705 os_memcpy(pos, anonce, FILS_NONCE_LEN); 706 pos += FILS_NONCE_LEN; 707 if (dhss) 708 os_memcpy(pos, dhss, dhss_len); 709 710 ptk->kck_len = 0; 711 ptk->kek_len = wpa_kek_len(akmp, pmk_len); 712 ptk->tk_len = wpa_cipher_key_len(cipher); 713 if (wpa_key_mgmt_sha384(akmp)) 714 *ick_len = 48; 715 else if (wpa_key_mgmt_sha256(akmp)) 716 *ick_len = 32; 717 else 718 goto err; 719 key_data_len = *ick_len + ptk->kek_len + ptk->tk_len; 720 721 if (kdk_len) { 722 if (kdk_len > WPA_KDK_MAX_LEN) { 723 wpa_printf(MSG_ERROR, "FILS: KDK len=%zu too big", 724 kdk_len); 725 goto err; 726 } 727 728 ptk->kdk_len = kdk_len; 729 key_data_len += kdk_len; 730 } else { 731 ptk->kdk_len = 0; 732 } 733 734 if (fils_ft && fils_ft_len) { 735 if (akmp == WPA_KEY_MGMT_FT_FILS_SHA256) { 736 *fils_ft_len = 32; 737 } else if (akmp == WPA_KEY_MGMT_FT_FILS_SHA384) { 738 *fils_ft_len = 48; 739 } else { 740 *fils_ft_len = 0; 741 fils_ft = NULL; 742 } 743 key_data_len += *fils_ft_len; 744 } 745 746 if (wpa_key_mgmt_sha384(akmp)) { 747 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA384)"); 748 if (sha384_prf(pmk, pmk_len, label, data, data_len, 749 tmp, key_data_len) < 0) 750 goto err; 751 } else { 752 wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA256)"); 753 if (sha256_prf(pmk, pmk_len, label, data, data_len, 754 tmp, key_data_len) < 0) 755 goto err; 756 } 757 758 wpa_printf(MSG_DEBUG, "FILS: PTK derivation - SPA=" MACSTR 759 " AA=" MACSTR, MAC2STR(spa), MAC2STR(aa)); 760 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); 761 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); 762 if (dhss) 763 wpa_hexdump_key(MSG_DEBUG, "FILS: DHss", dhss, dhss_len); 764 wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, pmk_len); 765 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-Key-Data", tmp, key_data_len); 766 767 os_memcpy(ick, tmp, *ick_len); 768 offset = *ick_len; 769 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, *ick_len); 770 771 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len); 772 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK", ptk->kek, ptk->kek_len); 773 offset += ptk->kek_len; 774 775 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len); 776 wpa_hexdump_key(MSG_DEBUG, "FILS: TK", ptk->tk, ptk->tk_len); 777 offset += ptk->tk_len; 778 779 if (fils_ft && fils_ft_len) { 780 os_memcpy(fils_ft, tmp + offset, *fils_ft_len); 781 wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-FT", 782 fils_ft, *fils_ft_len); 783 offset += *fils_ft_len; 784 } 785 786 if (ptk->kdk_len) { 787 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len); 788 wpa_hexdump_key(MSG_DEBUG, "FILS: KDK", ptk->kdk, ptk->kdk_len); 789 } 790 791 ptk->kek2_len = 0; 792 ptk->kck2_len = 0; 793 794 os_memset(tmp, 0, sizeof(tmp)); 795 ret = 0; 796 err: 797 bin_clear_free(data, data_len); 798 return ret; 799 } 800 801 802 int fils_key_auth_sk(const u8 *ick, size_t ick_len, const u8 *snonce, 803 const u8 *anonce, const u8 *sta_addr, const u8 *bssid, 804 const u8 *g_sta, size_t g_sta_len, 805 const u8 *g_ap, size_t g_ap_len, 806 int akmp, u8 *key_auth_sta, u8 *key_auth_ap, 807 size_t *key_auth_len) 808 { 809 const u8 *addr[6]; 810 size_t len[6]; 811 size_t num_elem = 4; 812 int res; 813 814 wpa_printf(MSG_DEBUG, "FILS: Key-Auth derivation: STA-MAC=" MACSTR 815 " AP-BSSID=" MACSTR, MAC2STR(sta_addr), MAC2STR(bssid)); 816 wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, ick_len); 817 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); 818 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); 819 wpa_hexdump(MSG_DEBUG, "FILS: gSTA", g_sta, g_sta_len); 820 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len); 821 822 /* 823 * For (Re)Association Request frame (STA->AP): 824 * Key-Auth = HMAC-Hash(ICK, SNonce || ANonce || STA-MAC || AP-BSSID 825 * [ || gSTA || gAP ]) 826 */ 827 addr[0] = snonce; 828 len[0] = FILS_NONCE_LEN; 829 addr[1] = anonce; 830 len[1] = FILS_NONCE_LEN; 831 addr[2] = sta_addr; 832 len[2] = ETH_ALEN; 833 addr[3] = bssid; 834 len[3] = ETH_ALEN; 835 if (g_sta && g_sta_len && g_ap && g_ap_len) { 836 addr[4] = g_sta; 837 len[4] = g_sta_len; 838 addr[5] = g_ap; 839 len[5] = g_ap_len; 840 num_elem = 6; 841 } 842 843 if (wpa_key_mgmt_sha384(akmp)) { 844 *key_auth_len = 48; 845 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len, 846 key_auth_sta); 847 } else if (wpa_key_mgmt_sha256(akmp)) { 848 *key_auth_len = 32; 849 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len, 850 key_auth_sta); 851 } else { 852 return -1; 853 } 854 if (res < 0) 855 return res; 856 857 /* 858 * For (Re)Association Response frame (AP->STA): 859 * Key-Auth = HMAC-Hash(ICK, ANonce || SNonce || AP-BSSID || STA-MAC 860 * [ || gAP || gSTA ]) 861 */ 862 addr[0] = anonce; 863 addr[1] = snonce; 864 addr[2] = bssid; 865 addr[3] = sta_addr; 866 if (g_sta && g_sta_len && g_ap && g_ap_len) { 867 addr[4] = g_ap; 868 len[4] = g_ap_len; 869 addr[5] = g_sta; 870 len[5] = g_sta_len; 871 } 872 873 if (wpa_key_mgmt_sha384(akmp)) 874 res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len, 875 key_auth_ap); 876 else if (wpa_key_mgmt_sha256(akmp)) 877 res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len, 878 key_auth_ap); 879 if (res < 0) 880 return res; 881 882 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (STA)", 883 key_auth_sta, *key_auth_len); 884 wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (AP)", 885 key_auth_ap, *key_auth_len); 886 887 return 0; 888 } 889 890 #endif /* CONFIG_FILS */ 891 892 893 #ifdef CONFIG_IEEE80211R 894 int wpa_ft_mic(int key_mgmt, const u8 *kck, size_t kck_len, const u8 *sta_addr, 895 const u8 *ap_addr, u8 transaction_seqnum, 896 const u8 *mdie, size_t mdie_len, 897 const u8 *ftie, size_t ftie_len, 898 const u8 *rsnie, size_t rsnie_len, 899 const u8 *ric, size_t ric_len, 900 const u8 *rsnxe, size_t rsnxe_len, 901 const struct wpabuf *extra, 902 u8 *mic) 903 { 904 const u8 *addr[11]; 905 size_t len[11]; 906 size_t i, num_elem = 0; 907 u8 zero_mic[32]; 908 size_t mic_len, fte_fixed_len; 909 int res; 910 911 if (kck_len == 16) { 912 mic_len = 16; 913 #ifdef CONFIG_SHA384 914 } else if (kck_len == 24) { 915 mic_len = 24; 916 #endif /* CONFIG_SHA384 */ 917 #ifdef CONFIG_SHA512 918 } else if (kck_len == 32) { 919 mic_len = 32; 920 #endif /* CONFIG_SHA512 */ 921 } else { 922 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u", 923 (unsigned int) kck_len); 924 return -1; 925 } 926 927 fte_fixed_len = sizeof(struct rsn_ftie) - 16 + mic_len; 928 929 addr[num_elem] = sta_addr; 930 len[num_elem] = ETH_ALEN; 931 num_elem++; 932 933 addr[num_elem] = ap_addr; 934 len[num_elem] = ETH_ALEN; 935 num_elem++; 936 937 addr[num_elem] = &transaction_seqnum; 938 len[num_elem] = 1; 939 num_elem++; 940 941 if (rsnie) { 942 addr[num_elem] = rsnie; 943 len[num_elem] = rsnie_len; 944 num_elem++; 945 } 946 if (mdie) { 947 addr[num_elem] = mdie; 948 len[num_elem] = mdie_len; 949 num_elem++; 950 } 951 if (ftie) { 952 if (ftie_len < 2 + fte_fixed_len) 953 return -1; 954 955 /* IE hdr and mic_control */ 956 addr[num_elem] = ftie; 957 len[num_elem] = 2 + 2; 958 num_elem++; 959 960 /* MIC field with all zeros */ 961 os_memset(zero_mic, 0, mic_len); 962 addr[num_elem] = zero_mic; 963 len[num_elem] = mic_len; 964 num_elem++; 965 966 /* Rest of FTIE */ 967 addr[num_elem] = ftie + 2 + 2 + mic_len; 968 len[num_elem] = ftie_len - (2 + 2 + mic_len); 969 num_elem++; 970 } 971 if (ric) { 972 addr[num_elem] = ric; 973 len[num_elem] = ric_len; 974 num_elem++; 975 } 976 977 if (rsnxe) { 978 addr[num_elem] = rsnxe; 979 len[num_elem] = rsnxe_len; 980 num_elem++; 981 } 982 983 if (extra) { 984 addr[num_elem] = wpabuf_head(extra); 985 len[num_elem] = wpabuf_len(extra); 986 num_elem++; 987 } 988 989 for (i = 0; i < num_elem; i++) 990 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]); 991 res = -1; 992 #ifdef CONFIG_SHA512 993 if (kck_len == 32) { 994 u8 hash[SHA512_MAC_LEN]; 995 996 if (hmac_sha512_vector(kck, kck_len, num_elem, addr, len, hash)) 997 return -1; 998 os_memcpy(mic, hash, 32); 999 res = 0; 1000 } 1001 #endif /* CONFIG_SHA384 */ 1002 #ifdef CONFIG_SHA384 1003 if (kck_len == 24) { 1004 u8 hash[SHA384_MAC_LEN]; 1005 1006 if (hmac_sha384_vector(kck, kck_len, num_elem, addr, len, hash)) 1007 return -1; 1008 os_memcpy(mic, hash, 24); 1009 res = 0; 1010 } 1011 #endif /* CONFIG_SHA384 */ 1012 if (kck_len == 16 && key_mgmt == WPA_KEY_MGMT_FT_SAE_EXT_KEY) { 1013 u8 hash[SHA256_MAC_LEN]; 1014 1015 if (hmac_sha256_vector(kck, kck_len, num_elem, addr, len, hash)) 1016 return -1; 1017 os_memcpy(mic, hash, 16); 1018 res = 0; 1019 } 1020 if (kck_len == 16 && key_mgmt != WPA_KEY_MGMT_FT_SAE_EXT_KEY && 1021 omac1_aes_128_vector(kck, num_elem, addr, len, mic) == 0) 1022 res = 0; 1023 1024 return res; 1025 } 1026 1027 1028 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len, 1029 struct wpa_ft_ies *parse, const u8 *opt) 1030 { 1031 const u8 *end, *pos; 1032 u8 link_id; 1033 1034 pos = opt; 1035 end = ie + ie_len; 1036 wpa_hexdump(MSG_DEBUG, "FT: Parse FTE subelements", pos, end - pos); 1037 1038 while (end - pos >= 2) { 1039 u8 id, len; 1040 1041 id = *pos++; 1042 len = *pos++; 1043 if (len > end - pos) { 1044 wpa_printf(MSG_DEBUG, "FT: Truncated subelement"); 1045 return -1; 1046 } 1047 1048 switch (id) { 1049 case FTIE_SUBELEM_R1KH_ID: 1050 if (len != FT_R1KH_ID_LEN) { 1051 wpa_printf(MSG_DEBUG, 1052 "FT: Invalid R1KH-ID length in FTIE: %d", 1053 len); 1054 return -1; 1055 } 1056 parse->r1kh_id = pos; 1057 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", 1058 parse->r1kh_id, FT_R1KH_ID_LEN); 1059 break; 1060 case FTIE_SUBELEM_GTK: 1061 wpa_printf(MSG_DEBUG, "FT: GTK"); 1062 parse->gtk = pos; 1063 parse->gtk_len = len; 1064 break; 1065 case FTIE_SUBELEM_R0KH_ID: 1066 if (len < 1 || len > FT_R0KH_ID_MAX_LEN) { 1067 wpa_printf(MSG_DEBUG, 1068 "FT: Invalid R0KH-ID length in FTIE: %d", 1069 len); 1070 return -1; 1071 } 1072 parse->r0kh_id = pos; 1073 parse->r0kh_id_len = len; 1074 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID", 1075 parse->r0kh_id, parse->r0kh_id_len); 1076 break; 1077 case FTIE_SUBELEM_IGTK: 1078 wpa_printf(MSG_DEBUG, "FT: IGTK"); 1079 parse->igtk = pos; 1080 parse->igtk_len = len; 1081 break; 1082 #ifdef CONFIG_OCV 1083 case FTIE_SUBELEM_OCI: 1084 parse->oci = pos; 1085 parse->oci_len = len; 1086 wpa_hexdump(MSG_DEBUG, "FT: OCI", 1087 parse->oci, parse->oci_len); 1088 break; 1089 #endif /* CONFIG_OCV */ 1090 case FTIE_SUBELEM_BIGTK: 1091 wpa_printf(MSG_DEBUG, "FT: BIGTK"); 1092 parse->bigtk = pos; 1093 parse->bigtk_len = len; 1094 break; 1095 case FTIE_SUBELEM_MLO_GTK: 1096 if (len < 2 + 1 + 1 + 8) { 1097 wpa_printf(MSG_DEBUG, 1098 "FT: Too short MLO GTK in FTE"); 1099 return -1; 1100 } 1101 link_id = pos[2] & 0x0f; 1102 wpa_printf(MSG_DEBUG, "FT: MLO GTK (Link ID %u)", 1103 link_id); 1104 if (link_id >= MAX_NUM_MLD_LINKS) 1105 break; 1106 parse->valid_mlo_gtks |= BIT(link_id); 1107 parse->mlo_gtk[link_id] = pos; 1108 parse->mlo_gtk_len[link_id] = len; 1109 break; 1110 case FTIE_SUBELEM_MLO_IGTK: 1111 if (len < 2 + 6 + 1 + 1) { 1112 wpa_printf(MSG_DEBUG, 1113 "FT: Too short MLO IGTK in FTE"); 1114 return -1; 1115 } 1116 link_id = pos[2 + 6] & 0x0f; 1117 wpa_printf(MSG_DEBUG, "FT: MLO IGTK (Link ID %u)", 1118 link_id); 1119 if (link_id >= MAX_NUM_MLD_LINKS) 1120 break; 1121 parse->valid_mlo_igtks |= BIT(link_id); 1122 parse->mlo_igtk[link_id] = pos; 1123 parse->mlo_igtk_len[link_id] = len; 1124 break; 1125 case FTIE_SUBELEM_MLO_BIGTK: 1126 if (len < 2 + 6 + 1 + 1) { 1127 wpa_printf(MSG_DEBUG, 1128 "FT: Too short MLO BIGTK in FTE"); 1129 return -1; 1130 } 1131 link_id = pos[2 + 6] & 0x0f; 1132 wpa_printf(MSG_DEBUG, "FT: MLO BIGTK (Link ID %u)", 1133 link_id); 1134 if (link_id >= MAX_NUM_MLD_LINKS) 1135 break; 1136 parse->valid_mlo_bigtks |= BIT(link_id); 1137 parse->mlo_bigtk[link_id] = pos; 1138 parse->mlo_bigtk_len[link_id] = len; 1139 break; 1140 default: 1141 wpa_printf(MSG_DEBUG, "FT: Unknown subelem id %u", id); 1142 break; 1143 } 1144 1145 pos += len; 1146 } 1147 1148 return 0; 1149 } 1150 1151 1152 static int wpa_ft_parse_fte(int key_mgmt, const u8 *ie, size_t len, 1153 struct wpa_ft_ies *parse) 1154 { 1155 size_t mic_len; 1156 u8 mic_len_info; 1157 const u8 *pos = ie; 1158 const u8 *end = pos + len; 1159 1160 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control", pos, 2); 1161 parse->fte_rsnxe_used = pos[0] & FTE_MIC_CTRL_RSNXE_USED; 1162 mic_len_info = (pos[0] & FTE_MIC_CTRL_MIC_LEN_MASK) >> 1163 FTE_MIC_CTRL_MIC_LEN_SHIFT; 1164 parse->fte_elem_count = pos[1]; 1165 pos += 2; 1166 1167 if (key_mgmt == WPA_KEY_MGMT_FT_SAE_EXT_KEY) { 1168 switch (mic_len_info) { 1169 case FTE_MIC_LEN_16: 1170 mic_len = 16; 1171 break; 1172 case FTE_MIC_LEN_24: 1173 mic_len = 24; 1174 break; 1175 case FTE_MIC_LEN_32: 1176 mic_len = 32; 1177 break; 1178 default: 1179 wpa_printf(MSG_DEBUG, 1180 "FT: Unknown MIC Length subfield value %u", 1181 mic_len_info); 1182 return -1; 1183 } 1184 } else { 1185 mic_len = wpa_key_mgmt_sha384(key_mgmt) ? 24 : 16; 1186 } 1187 if (mic_len > (size_t) (end - pos)) { 1188 wpa_printf(MSG_DEBUG, "FT: No room for %zu octet MIC in FTE", 1189 mic_len); 1190 return -1; 1191 } 1192 wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC", pos, mic_len); 1193 parse->fte_mic = pos; 1194 parse->fte_mic_len = mic_len; 1195 pos += mic_len; 1196 1197 if (2 * WPA_NONCE_LEN > end - pos) 1198 return -1; 1199 parse->fte_anonce = pos; 1200 wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce", 1201 parse->fte_anonce, WPA_NONCE_LEN); 1202 pos += WPA_NONCE_LEN; 1203 parse->fte_snonce = pos; 1204 wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce", 1205 parse->fte_snonce, WPA_NONCE_LEN); 1206 pos += WPA_NONCE_LEN; 1207 1208 return wpa_ft_parse_ftie(ie, len, parse, pos); 1209 } 1210 1211 1212 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, struct wpa_ft_ies *parse, 1213 int key_mgmt, bool reassoc_resp) 1214 { 1215 const u8 *end, *pos; 1216 struct wpa_ie_data data; 1217 int ret; 1218 int prot_ie_count = 0; 1219 const u8 *fte = NULL; 1220 size_t fte_len = 0; 1221 bool is_fte = false; 1222 struct ieee802_11_elems elems; 1223 1224 os_memset(parse, 0, sizeof(*parse)); 1225 if (ies == NULL) 1226 return 0; 1227 1228 if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) == ParseFailed) { 1229 wpa_printf(MSG_DEBUG, "FT: Failed to parse elements"); 1230 goto fail; 1231 } 1232 1233 pos = ies; 1234 end = ies + ies_len; 1235 while (end - pos >= 2) { 1236 u8 id, len; 1237 1238 id = *pos++; 1239 len = *pos++; 1240 if (len > end - pos) 1241 break; 1242 1243 if (id != WLAN_EID_FAST_BSS_TRANSITION && 1244 id != WLAN_EID_FRAGMENT) 1245 is_fte = false; 1246 1247 switch (id) { 1248 case WLAN_EID_RSN: 1249 wpa_hexdump(MSG_DEBUG, "FT: RSNE", pos, len); 1250 parse->rsn = pos; 1251 parse->rsn_len = len; 1252 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2, 1253 parse->rsn_len + 2, 1254 &data); 1255 if (ret < 0) { 1256 wpa_printf(MSG_DEBUG, "FT: Failed to parse " 1257 "RSN IE: %d", ret); 1258 goto fail; 1259 } 1260 parse->rsn_capab = data.capabilities; 1261 if (data.num_pmkid == 1 && data.pmkid) 1262 parse->rsn_pmkid = data.pmkid; 1263 parse->key_mgmt = data.key_mgmt; 1264 parse->pairwise_cipher = data.pairwise_cipher; 1265 if (!key_mgmt) 1266 key_mgmt = parse->key_mgmt; 1267 break; 1268 case WLAN_EID_RSNX: 1269 wpa_hexdump(MSG_DEBUG, "FT: RSNXE", pos, len); 1270 if (len < 1) 1271 break; 1272 parse->rsnxe = pos; 1273 parse->rsnxe_len = len; 1274 break; 1275 case WLAN_EID_MOBILITY_DOMAIN: 1276 wpa_hexdump(MSG_DEBUG, "FT: MDE", pos, len); 1277 if (len < sizeof(struct rsn_mdie)) 1278 goto fail; 1279 parse->mdie = pos; 1280 parse->mdie_len = len; 1281 break; 1282 case WLAN_EID_FAST_BSS_TRANSITION: 1283 wpa_hexdump(MSG_DEBUG, "FT: FTE", pos, len); 1284 /* The first two octets (MIC Control field) is in the 1285 * same offset for all cases, but the second field (MIC) 1286 * has variable length with three different values. 1287 * In particular the FT-SAE-EXT-KEY is inconvinient to 1288 * parse, so try to handle this in pieces instead of 1289 * using the struct rsn_ftie* definitions. */ 1290 1291 if (len < 2) 1292 goto fail; 1293 prot_ie_count = pos[1]; /* Element Count field in 1294 * MIC Control */ 1295 is_fte = true; 1296 fte = pos; 1297 fte_len = len; 1298 break; 1299 case WLAN_EID_FRAGMENT: 1300 if (is_fte) { 1301 wpa_hexdump(MSG_DEBUG, "FT: FTE fragment", 1302 pos, len); 1303 fte_len += 2 + len; 1304 } 1305 break; 1306 case WLAN_EID_TIMEOUT_INTERVAL: 1307 wpa_hexdump(MSG_DEBUG, "FT: Timeout Interval", 1308 pos, len); 1309 if (len != 5) 1310 break; 1311 parse->tie = pos; 1312 parse->tie_len = len; 1313 break; 1314 case WLAN_EID_RIC_DATA: 1315 if (parse->ric == NULL) 1316 parse->ric = pos - 2; 1317 break; 1318 } 1319 1320 pos += len; 1321 } 1322 1323 if (fte) { 1324 int res; 1325 1326 if (fte_len < 255) { 1327 res = wpa_ft_parse_fte(key_mgmt, fte, fte_len, parse); 1328 } else { 1329 parse->fte_buf = ieee802_11_defrag(fte, fte_len, false); 1330 if (!parse->fte_buf) 1331 goto fail; 1332 res = wpa_ft_parse_fte(key_mgmt, 1333 wpabuf_head(parse->fte_buf), 1334 wpabuf_len(parse->fte_buf), 1335 parse); 1336 } 1337 if (res < 0) 1338 goto fail; 1339 1340 /* FTE might be fragmented. If it is, the separate Fragment 1341 * elements are included in MIC calculation as full elements. */ 1342 parse->ftie = fte; 1343 parse->ftie_len = fte_len; 1344 } 1345 1346 if (prot_ie_count == 0) 1347 return 0; /* no MIC */ 1348 1349 /* 1350 * Check that the protected IE count matches with IEs included in the 1351 * frame. 1352 */ 1353 if (reassoc_resp && elems.basic_mle) { 1354 unsigned int link_id; 1355 1356 /* TODO: This count should be done based on all _requested_, 1357 * not _accepted_ links. */ 1358 for (link_id = 0; link_id < MAX_NUM_MLD_LINKS; link_id++) { 1359 if (parse->mlo_gtk[link_id]) { 1360 if (parse->rsn) 1361 prot_ie_count--; 1362 if (parse->rsnxe) 1363 prot_ie_count--; 1364 } 1365 } 1366 } else { 1367 if (parse->rsn) 1368 prot_ie_count--; 1369 if (parse->rsnxe) 1370 prot_ie_count--; 1371 } 1372 if (parse->mdie) 1373 prot_ie_count--; 1374 if (parse->ftie) 1375 prot_ie_count--; 1376 if (prot_ie_count < 0) { 1377 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in " 1378 "the protected IE count"); 1379 goto fail; 1380 } 1381 1382 if (prot_ie_count == 0 && parse->ric) { 1383 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not " 1384 "included in protected IE count"); 1385 goto fail; 1386 } 1387 1388 /* Determine the end of the RIC IE(s) */ 1389 if (parse->ric) { 1390 pos = parse->ric; 1391 while (end - pos >= 2 && 2 + pos[1] <= end - pos && 1392 prot_ie_count) { 1393 prot_ie_count--; 1394 pos += 2 + pos[1]; 1395 } 1396 parse->ric_len = pos - parse->ric; 1397 } 1398 if (prot_ie_count) { 1399 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from " 1400 "frame", (int) prot_ie_count); 1401 goto fail; 1402 } 1403 1404 return 0; 1405 1406 fail: 1407 wpa_ft_parse_ies_free(parse); 1408 return -1; 1409 } 1410 1411 1412 void wpa_ft_parse_ies_free(struct wpa_ft_ies *parse) 1413 { 1414 if (!parse) 1415 return; 1416 wpabuf_free(parse->fte_buf); 1417 parse->fte_buf = NULL; 1418 } 1419 1420 #endif /* CONFIG_IEEE80211R */ 1421 1422 1423 #ifdef CONFIG_PASN 1424 1425 /* 1426 * pasn_use_sha384 - Should SHA384 be used or SHA256 1427 * 1428 * @akmp: Authentication and key management protocol 1429 * @cipher: The cipher suite 1430 * 1431 * According to IEEE P802.11az/D2.7, 12.12.7, the hash algorithm to use is the 1432 * hash algorithm defined for the Base AKM (see Table 9-151 (AKM suite 1433 * selectors)). When there is no Base AKM, the hash algorithm is selected based 1434 * on the pairwise cipher suite provided in the RSNE by the AP in the second 1435 * PASN frame. SHA-256 is used as the hash algorithm, except for the ciphers 1436 * 00-0F-AC:9 and 00-0F-AC:10 for which SHA-384 is used. 1437 */ 1438 bool pasn_use_sha384(int akmp, int cipher) 1439 { 1440 return (akmp == WPA_KEY_MGMT_PASN && (cipher == WPA_CIPHER_CCMP_256 || 1441 cipher == WPA_CIPHER_GCMP_256)) || 1442 wpa_key_mgmt_sha384(akmp); 1443 } 1444 1445 1446 /** 1447 * pasn_pmk_to_ptk - Calculate PASN PTK from PMK, addresses, etc. 1448 * @pmk: Pairwise master key 1449 * @pmk_len: Length of PMK 1450 * @spa: Suppplicant address 1451 * @bssid: AP BSSID 1452 * @dhss: Is the shared secret (DHss) derived from the PASN ephemeral key 1453 * exchange encoded as an octet string 1454 * @dhss_len: The length of dhss in octets 1455 * @ptk: Buffer for pairwise transient key 1456 * @akmp: Negotiated AKM 1457 * @cipher: Negotiated pairwise cipher 1458 * @kdk_len: the length in octets that should be derived for HTLK. Can be zero. 1459 * Returns: 0 on success, -1 on failure 1460 */ 1461 int pasn_pmk_to_ptk(const u8 *pmk, size_t pmk_len, 1462 const u8 *spa, const u8 *bssid, 1463 const u8 *dhss, size_t dhss_len, 1464 struct wpa_ptk *ptk, int akmp, int cipher, 1465 size_t kdk_len) 1466 { 1467 u8 tmp[WPA_KCK_MAX_LEN + WPA_TK_MAX_LEN + WPA_KDK_MAX_LEN]; 1468 u8 *data; 1469 size_t data_len, ptk_len; 1470 int ret = -1; 1471 const char *label = "PASN PTK Derivation"; 1472 1473 if (!pmk || !pmk_len) { 1474 wpa_printf(MSG_ERROR, "PASN: No PMK set for PTK derivation"); 1475 return -1; 1476 } 1477 1478 if (!dhss || !dhss_len) { 1479 wpa_printf(MSG_ERROR, "PASN: No DHss set for PTK derivation"); 1480 return -1; 1481 } 1482 1483 /* 1484 * PASN-PTK = KDF(PMK, PASN PTK Derivation, SPA || BSSID || DHss) 1485 * 1486 * KCK = L(PASN-PTK, 0, 256) 1487 * TK = L(PASN-PTK, 256, TK_bits) 1488 * KDK = L(PASN-PTK, 256 + TK_bits, kdk_len * 8) 1489 */ 1490 data_len = 2 * ETH_ALEN + dhss_len; 1491 data = os_zalloc(data_len); 1492 if (!data) 1493 return -1; 1494 1495 os_memcpy(data, spa, ETH_ALEN); 1496 os_memcpy(data + ETH_ALEN, bssid, ETH_ALEN); 1497 os_memcpy(data + 2 * ETH_ALEN, dhss, dhss_len); 1498 1499 ptk->kck_len = WPA_PASN_KCK_LEN; 1500 ptk->tk_len = wpa_cipher_key_len(cipher); 1501 ptk->kdk_len = kdk_len; 1502 ptk->kek_len = 0; 1503 ptk->kek2_len = 0; 1504 ptk->kck2_len = 0; 1505 1506 if (ptk->tk_len == 0) { 1507 wpa_printf(MSG_ERROR, 1508 "PASN: Unsupported cipher (0x%x) used in PTK derivation", 1509 cipher); 1510 goto err; 1511 } 1512 1513 ptk_len = ptk->kck_len + ptk->tk_len + ptk->kdk_len; 1514 if (ptk_len > sizeof(tmp)) 1515 goto err; 1516 1517 if (pasn_use_sha384(akmp, cipher)) { 1518 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA384"); 1519 1520 if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp, 1521 ptk_len) < 0) 1522 goto err; 1523 } else { 1524 wpa_printf(MSG_DEBUG, "PASN: PTK derivation using SHA256"); 1525 1526 if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp, 1527 ptk_len) < 0) 1528 goto err; 1529 } 1530 1531 wpa_printf(MSG_DEBUG, 1532 "PASN: PTK derivation: SPA=" MACSTR " BSSID=" MACSTR, 1533 MAC2STR(spa), MAC2STR(bssid)); 1534 1535 wpa_hexdump_key(MSG_DEBUG, "PASN: DHss", dhss, dhss_len); 1536 wpa_hexdump_key(MSG_DEBUG, "PASN: PMK", pmk, pmk_len); 1537 wpa_hexdump_key(MSG_DEBUG, "PASN: PASN-PTK", tmp, ptk_len); 1538 1539 os_memcpy(ptk->kck, tmp, WPA_PASN_KCK_LEN); 1540 wpa_hexdump_key(MSG_DEBUG, "PASN: KCK:", ptk->kck, WPA_PASN_KCK_LEN); 1541 1542 os_memcpy(ptk->tk, tmp + WPA_PASN_KCK_LEN, ptk->tk_len); 1543 wpa_hexdump_key(MSG_DEBUG, "PASN: TK:", ptk->tk, ptk->tk_len); 1544 1545 if (kdk_len) { 1546 os_memcpy(ptk->kdk, tmp + WPA_PASN_KCK_LEN + ptk->tk_len, 1547 ptk->kdk_len); 1548 wpa_hexdump_key(MSG_DEBUG, "PASN: KDK:", 1549 ptk->kdk, ptk->kdk_len); 1550 } 1551 1552 forced_memzero(tmp, sizeof(tmp)); 1553 ret = 0; 1554 err: 1555 bin_clear_free(data, data_len); 1556 return ret; 1557 } 1558 1559 1560 /* 1561 * pasn_mic_len - Returns the MIC length for PASN authentication 1562 */ 1563 u8 pasn_mic_len(int akmp, int cipher) 1564 { 1565 if (pasn_use_sha384(akmp, cipher)) 1566 return 24; 1567 1568 return 16; 1569 } 1570 1571 1572 /** 1573 * wpa_ltf_keyseed - Compute LTF keyseed from KDK 1574 * @ptk: Buffer that holds pairwise transient key 1575 * @akmp: Negotiated AKM 1576 * @cipher: Negotiated pairwise cipher 1577 * Returns: 0 on success, -1 on failure 1578 */ 1579 int wpa_ltf_keyseed(struct wpa_ptk *ptk, int akmp, int cipher) 1580 { 1581 u8 *buf; 1582 size_t buf_len; 1583 u8 hash[SHA384_MAC_LEN]; 1584 const u8 *kdk = ptk->kdk; 1585 size_t kdk_len = ptk->kdk_len; 1586 const char *label = "Secure LTF key seed"; 1587 1588 if (!kdk || !kdk_len) { 1589 wpa_printf(MSG_ERROR, "WPA: No KDK for LTF keyseed generation"); 1590 return -1; 1591 } 1592 1593 buf = (u8 *)label; 1594 buf_len = os_strlen(label); 1595 1596 if (pasn_use_sha384(akmp, cipher)) { 1597 wpa_printf(MSG_DEBUG, 1598 "WPA: Secure LTF keyseed using HMAC-SHA384"); 1599 1600 if (hmac_sha384(kdk, kdk_len, buf, buf_len, hash)) { 1601 wpa_printf(MSG_ERROR, 1602 "WPA: HMAC-SHA384 compute failed"); 1603 return -1; 1604 } 1605 os_memcpy(ptk->ltf_keyseed, hash, SHA384_MAC_LEN); 1606 ptk->ltf_keyseed_len = SHA384_MAC_LEN; 1607 wpa_hexdump_key(MSG_DEBUG, "WPA: Secure LTF keyseed: ", 1608 ptk->ltf_keyseed, ptk->ltf_keyseed_len); 1609 1610 } else { 1611 wpa_printf(MSG_DEBUG, "WPA: LTF keyseed using HMAC-SHA256"); 1612 1613 if (hmac_sha256(kdk, kdk_len, buf, buf_len, hash)) { 1614 wpa_printf(MSG_ERROR, 1615 "WPA: HMAC-SHA256 compute failed"); 1616 return -1; 1617 } 1618 os_memcpy(ptk->ltf_keyseed, hash, SHA256_MAC_LEN); 1619 ptk->ltf_keyseed_len = SHA256_MAC_LEN; 1620 wpa_hexdump_key(MSG_DEBUG, "WPA: Secure LTF keyseed: ", 1621 ptk->ltf_keyseed, ptk->ltf_keyseed_len); 1622 } 1623 1624 return 0; 1625 } 1626 1627 1628 /** 1629 * pasn_mic - Calculate PASN MIC 1630 * @kck: The key confirmation key for the PASN PTKSA 1631 * @akmp: Negotiated AKM 1632 * @cipher: Negotiated pairwise cipher 1633 * @addr1: For the 2nd PASN frame supplicant address; for the 3rd frame the 1634 * BSSID 1635 * @addr2: For the 2nd PASN frame the BSSID; for the 3rd frame the supplicant 1636 * address 1637 * @data: For calculating the MIC for the 2nd PASN frame, this should hold the 1638 * Beacon frame RSNE + RSNXE. For calculating the MIC for the 3rd PASN 1639 * frame, this should hold the hash of the body of the PASN 1st frame. 1640 * @data_len: The length of data 1641 * @frame: The body of the PASN frame including the MIC element with the octets 1642 * in the MIC field of the MIC element set to 0. 1643 * @frame_len: The length of frame 1644 * @mic: Buffer to hold the MIC on success. Should be big enough to handle the 1645 * maximal MIC length 1646 * Returns: 0 on success, -1 on failure 1647 */ 1648 int pasn_mic(const u8 *kck, int akmp, int cipher, 1649 const u8 *addr1, const u8 *addr2, 1650 const u8 *data, size_t data_len, 1651 const u8 *frame, size_t frame_len, u8 *mic) 1652 { 1653 u8 *buf; 1654 u8 hash[SHA384_MAC_LEN]; 1655 size_t buf_len = 2 * ETH_ALEN + data_len + frame_len; 1656 int ret = -1; 1657 1658 if (!kck) { 1659 wpa_printf(MSG_ERROR, "PASN: No KCK for MIC calculation"); 1660 return -1; 1661 } 1662 1663 if (!data || !data_len) { 1664 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation"); 1665 return -1; 1666 } 1667 1668 if (!frame || !frame_len) { 1669 wpa_printf(MSG_ERROR, "PASN: invalid data for MIC calculation"); 1670 return -1; 1671 } 1672 1673 buf = os_zalloc(buf_len); 1674 if (!buf) 1675 return -1; 1676 1677 os_memcpy(buf, addr1, ETH_ALEN); 1678 os_memcpy(buf + ETH_ALEN, addr2, ETH_ALEN); 1679 1680 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: data", data, data_len); 1681 os_memcpy(buf + 2 * ETH_ALEN, data, data_len); 1682 1683 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: frame", frame, frame_len); 1684 os_memcpy(buf + 2 * ETH_ALEN + data_len, frame, frame_len); 1685 1686 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: KCK", kck, WPA_PASN_KCK_LEN); 1687 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: buf", buf, buf_len); 1688 1689 if (pasn_use_sha384(akmp, cipher)) { 1690 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA384"); 1691 1692 if (hmac_sha384(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash)) 1693 goto err; 1694 1695 os_memcpy(mic, hash, 24); 1696 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 24); 1697 } else { 1698 wpa_printf(MSG_DEBUG, "PASN: MIC using HMAC-SHA256"); 1699 1700 if (hmac_sha256(kck, WPA_PASN_KCK_LEN, buf, buf_len, hash)) 1701 goto err; 1702 1703 os_memcpy(mic, hash, 16); 1704 wpa_hexdump_key(MSG_DEBUG, "PASN: MIC: mic: ", mic, 16); 1705 } 1706 1707 ret = 0; 1708 err: 1709 bin_clear_free(buf, buf_len); 1710 return ret; 1711 } 1712 1713 1714 /** 1715 * pasn_auth_frame_hash - Computes a hash of an Authentication frame body 1716 * @akmp: Negotiated AKM 1717 * @cipher: Negotiated pairwise cipher 1718 * @data: Pointer to the Authentication frame body 1719 * @len: Length of the Authentication frame body 1720 * @hash: On return would hold the computed hash. Should be big enough to handle 1721 * SHA384. 1722 * Returns: 0 on success, -1 on failure 1723 */ 1724 int pasn_auth_frame_hash(int akmp, int cipher, const u8 *data, size_t len, 1725 u8 *hash) 1726 { 1727 if (pasn_use_sha384(akmp, cipher)) { 1728 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-384"); 1729 return sha384_vector(1, &data, &len, hash); 1730 } else { 1731 wpa_printf(MSG_DEBUG, "PASN: Frame hash using SHA-256"); 1732 return sha256_vector(1, &data, &len, hash); 1733 } 1734 } 1735 1736 #endif /* CONFIG_PASN */ 1737 1738 1739 static int rsn_selector_to_bitfield(const u8 *s) 1740 { 1741 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE) 1742 return WPA_CIPHER_NONE; 1743 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP) 1744 return WPA_CIPHER_TKIP; 1745 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP) 1746 return WPA_CIPHER_CCMP; 1747 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC) 1748 return WPA_CIPHER_AES_128_CMAC; 1749 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP) 1750 return WPA_CIPHER_GCMP; 1751 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256) 1752 return WPA_CIPHER_CCMP_256; 1753 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256) 1754 return WPA_CIPHER_GCMP_256; 1755 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128) 1756 return WPA_CIPHER_BIP_GMAC_128; 1757 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256) 1758 return WPA_CIPHER_BIP_GMAC_256; 1759 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256) 1760 return WPA_CIPHER_BIP_CMAC_256; 1761 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED) 1762 return WPA_CIPHER_GTK_NOT_USED; 1763 return 0; 1764 } 1765 1766 1767 static int rsn_key_mgmt_to_bitfield(const u8 *s) 1768 { 1769 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X) 1770 return WPA_KEY_MGMT_IEEE8021X; 1771 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X) 1772 return WPA_KEY_MGMT_PSK; 1773 #ifdef CONFIG_IEEE80211R 1774 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X) 1775 return WPA_KEY_MGMT_FT_IEEE8021X; 1776 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK) 1777 return WPA_KEY_MGMT_FT_PSK; 1778 #ifdef CONFIG_SHA384 1779 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384) 1780 return WPA_KEY_MGMT_FT_IEEE8021X_SHA384; 1781 #endif /* CONFIG_SHA384 */ 1782 #endif /* CONFIG_IEEE80211R */ 1783 #ifdef CONFIG_SHA384 1784 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA384) 1785 return WPA_KEY_MGMT_IEEE8021X_SHA384; 1786 #endif /* CONFIG_SHA384 */ 1787 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256) 1788 return WPA_KEY_MGMT_IEEE8021X_SHA256; 1789 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256) 1790 return WPA_KEY_MGMT_PSK_SHA256; 1791 #ifdef CONFIG_SAE 1792 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE) 1793 return WPA_KEY_MGMT_SAE; 1794 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE_EXT_KEY) 1795 return WPA_KEY_MGMT_SAE_EXT_KEY; 1796 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE) 1797 return WPA_KEY_MGMT_FT_SAE; 1798 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE_EXT_KEY) 1799 return WPA_KEY_MGMT_FT_SAE_EXT_KEY; 1800 #endif /* CONFIG_SAE */ 1801 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B) 1802 return WPA_KEY_MGMT_IEEE8021X_SUITE_B; 1803 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192) 1804 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192; 1805 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA256) 1806 return WPA_KEY_MGMT_FILS_SHA256; 1807 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA384) 1808 return WPA_KEY_MGMT_FILS_SHA384; 1809 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA256) 1810 return WPA_KEY_MGMT_FT_FILS_SHA256; 1811 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA384) 1812 return WPA_KEY_MGMT_FT_FILS_SHA384; 1813 #ifdef CONFIG_OWE 1814 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OWE) 1815 return WPA_KEY_MGMT_OWE; 1816 #endif /* CONFIG_OWE */ 1817 #ifdef CONFIG_DPP 1818 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_DPP) 1819 return WPA_KEY_MGMT_DPP; 1820 #endif /* CONFIG_DPP */ 1821 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN) 1822 return WPA_KEY_MGMT_OSEN; 1823 #ifdef CONFIG_PASN 1824 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PASN) 1825 return WPA_KEY_MGMT_PASN; 1826 #endif /* CONFIG_PASN */ 1827 return 0; 1828 } 1829 1830 1831 int wpa_cipher_valid_group(int cipher) 1832 { 1833 return wpa_cipher_valid_pairwise(cipher) || 1834 cipher == WPA_CIPHER_GTK_NOT_USED; 1835 } 1836 1837 1838 int wpa_cipher_valid_mgmt_group(int cipher) 1839 { 1840 return cipher == WPA_CIPHER_GTK_NOT_USED || 1841 cipher == WPA_CIPHER_AES_128_CMAC || 1842 cipher == WPA_CIPHER_BIP_GMAC_128 || 1843 cipher == WPA_CIPHER_BIP_GMAC_256 || 1844 cipher == WPA_CIPHER_BIP_CMAC_256; 1845 } 1846 1847 1848 /** 1849 * wpa_parse_wpa_ie_rsn - Parse RSN IE 1850 * @rsn_ie: Buffer containing RSN IE 1851 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets) 1852 * @data: Pointer to structure that will be filled in with parsed data 1853 * Returns: 0 on success, <0 on failure 1854 */ 1855 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len, 1856 struct wpa_ie_data *data) 1857 { 1858 const u8 *pos; 1859 int left; 1860 int i, count; 1861 1862 os_memset(data, 0, sizeof(*data)); 1863 data->proto = WPA_PROTO_RSN; 1864 data->pairwise_cipher = WPA_CIPHER_CCMP; 1865 data->group_cipher = WPA_CIPHER_CCMP; 1866 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 1867 data->capabilities = 0; 1868 data->pmkid = NULL; 1869 data->num_pmkid = 0; 1870 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; 1871 1872 if (rsn_ie_len == 0) { 1873 /* No RSN IE - fail silently */ 1874 return -1; 1875 } 1876 1877 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) { 1878 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", 1879 __func__, (unsigned long) rsn_ie_len); 1880 return -1; 1881 } 1882 1883 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 && 1884 rsn_ie[1] == rsn_ie_len - 2 && 1885 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) { 1886 pos = rsn_ie + 6; 1887 left = rsn_ie_len - 6; 1888 1889 data->group_cipher = WPA_CIPHER_GTK_NOT_USED; 1890 data->has_group = 1; 1891 data->key_mgmt = WPA_KEY_MGMT_OSEN; 1892 data->proto = WPA_PROTO_OSEN; 1893 } else { 1894 const struct rsn_ie_hdr *hdr; 1895 1896 hdr = (const struct rsn_ie_hdr *) rsn_ie; 1897 1898 if (hdr->elem_id != WLAN_EID_RSN || 1899 hdr->len != rsn_ie_len - 2 || 1900 WPA_GET_LE16(hdr->version) != RSN_VERSION) { 1901 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", 1902 __func__); 1903 return -2; 1904 } 1905 1906 pos = (const u8 *) (hdr + 1); 1907 left = rsn_ie_len - sizeof(*hdr); 1908 } 1909 1910 if (left >= RSN_SELECTOR_LEN) { 1911 data->group_cipher = rsn_selector_to_bitfield(pos); 1912 data->has_group = 1; 1913 if (!wpa_cipher_valid_group(data->group_cipher)) { 1914 wpa_printf(MSG_DEBUG, 1915 "%s: invalid group cipher 0x%x (%08x)", 1916 __func__, data->group_cipher, 1917 WPA_GET_BE32(pos)); 1918 #ifdef CONFIG_NO_TKIP 1919 if (RSN_SELECTOR_GET(pos) == RSN_CIPHER_SUITE_TKIP) { 1920 wpa_printf(MSG_DEBUG, 1921 "%s: TKIP as group cipher not supported in CONFIG_NO_TKIP=y build", 1922 __func__); 1923 } 1924 #endif /* CONFIG_NO_TKIP */ 1925 return -1; 1926 } 1927 pos += RSN_SELECTOR_LEN; 1928 left -= RSN_SELECTOR_LEN; 1929 } else if (left > 0) { 1930 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", 1931 __func__, left); 1932 return -3; 1933 } 1934 1935 if (left >= 2) { 1936 data->pairwise_cipher = 0; 1937 count = WPA_GET_LE16(pos); 1938 pos += 2; 1939 left -= 2; 1940 if (count == 0 || count > left / RSN_SELECTOR_LEN) { 1941 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " 1942 "count %u left %u", __func__, count, left); 1943 return -4; 1944 } 1945 if (count) 1946 data->has_pairwise = 1; 1947 for (i = 0; i < count; i++) { 1948 data->pairwise_cipher |= rsn_selector_to_bitfield(pos); 1949 pos += RSN_SELECTOR_LEN; 1950 left -= RSN_SELECTOR_LEN; 1951 } 1952 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) { 1953 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as " 1954 "pairwise cipher", __func__); 1955 return -1; 1956 } 1957 } else if (left == 1) { 1958 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", 1959 __func__); 1960 return -5; 1961 } 1962 1963 if (left >= 2) { 1964 data->key_mgmt = 0; 1965 count = WPA_GET_LE16(pos); 1966 pos += 2; 1967 left -= 2; 1968 if (count == 0 || count > left / RSN_SELECTOR_LEN) { 1969 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " 1970 "count %u left %u", __func__, count, left); 1971 return -6; 1972 } 1973 for (i = 0; i < count; i++) { 1974 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos); 1975 pos += RSN_SELECTOR_LEN; 1976 left -= RSN_SELECTOR_LEN; 1977 } 1978 } else if (left == 1) { 1979 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", 1980 __func__); 1981 return -7; 1982 } 1983 1984 if (left >= 2) { 1985 data->capabilities = WPA_GET_LE16(pos); 1986 pos += 2; 1987 left -= 2; 1988 } 1989 1990 if (left >= 2) { 1991 u16 num_pmkid = WPA_GET_LE16(pos); 1992 pos += 2; 1993 left -= 2; 1994 if (num_pmkid > (unsigned int) left / PMKID_LEN) { 1995 wpa_printf(MSG_DEBUG, "%s: PMKID underflow " 1996 "(num_pmkid=%u left=%d)", 1997 __func__, num_pmkid, left); 1998 data->num_pmkid = 0; 1999 return -9; 2000 } else { 2001 data->num_pmkid = num_pmkid; 2002 data->pmkid = pos; 2003 pos += data->num_pmkid * PMKID_LEN; 2004 left -= data->num_pmkid * PMKID_LEN; 2005 } 2006 } 2007 2008 if (left >= 4) { 2009 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos); 2010 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) { 2011 wpa_printf(MSG_DEBUG, 2012 "%s: Unsupported management group cipher 0x%x (%08x)", 2013 __func__, data->mgmt_group_cipher, 2014 WPA_GET_BE32(pos)); 2015 return -10; 2016 } 2017 pos += RSN_SELECTOR_LEN; 2018 left -= RSN_SELECTOR_LEN; 2019 } 2020 2021 if (left > 0) { 2022 wpa_hexdump(MSG_DEBUG, 2023 "wpa_parse_wpa_ie_rsn: ignore trailing bytes", 2024 pos, left); 2025 } 2026 2027 return 0; 2028 } 2029 2030 2031 static int wpa_selector_to_bitfield(const u8 *s) 2032 { 2033 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE) 2034 return WPA_CIPHER_NONE; 2035 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP) 2036 return WPA_CIPHER_TKIP; 2037 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP) 2038 return WPA_CIPHER_CCMP; 2039 return 0; 2040 } 2041 2042 2043 static int wpa_key_mgmt_to_bitfield(const u8 *s) 2044 { 2045 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X) 2046 return WPA_KEY_MGMT_IEEE8021X; 2047 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X) 2048 return WPA_KEY_MGMT_PSK; 2049 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE) 2050 return WPA_KEY_MGMT_WPA_NONE; 2051 return 0; 2052 } 2053 2054 2055 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len, 2056 struct wpa_ie_data *data) 2057 { 2058 const struct wpa_ie_hdr *hdr; 2059 const u8 *pos; 2060 int left; 2061 int i, count; 2062 2063 os_memset(data, 0, sizeof(*data)); 2064 data->proto = WPA_PROTO_WPA; 2065 data->pairwise_cipher = WPA_CIPHER_TKIP; 2066 data->group_cipher = WPA_CIPHER_TKIP; 2067 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 2068 data->capabilities = 0; 2069 data->pmkid = NULL; 2070 data->num_pmkid = 0; 2071 data->mgmt_group_cipher = 0; 2072 2073 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) { 2074 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", 2075 __func__, (unsigned long) wpa_ie_len); 2076 return -1; 2077 } 2078 2079 hdr = (const struct wpa_ie_hdr *) wpa_ie; 2080 2081 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC || 2082 hdr->len != wpa_ie_len - 2 || 2083 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE || 2084 WPA_GET_LE16(hdr->version) != WPA_VERSION) { 2085 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", 2086 __func__); 2087 return -2; 2088 } 2089 2090 pos = (const u8 *) (hdr + 1); 2091 left = wpa_ie_len - sizeof(*hdr); 2092 2093 if (left >= WPA_SELECTOR_LEN) { 2094 data->group_cipher = wpa_selector_to_bitfield(pos); 2095 pos += WPA_SELECTOR_LEN; 2096 left -= WPA_SELECTOR_LEN; 2097 } else if (left > 0) { 2098 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", 2099 __func__, left); 2100 return -3; 2101 } 2102 2103 if (left >= 2) { 2104 data->pairwise_cipher = 0; 2105 count = WPA_GET_LE16(pos); 2106 pos += 2; 2107 left -= 2; 2108 if (count == 0 || count > left / WPA_SELECTOR_LEN) { 2109 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " 2110 "count %u left %u", __func__, count, left); 2111 return -4; 2112 } 2113 for (i = 0; i < count; i++) { 2114 data->pairwise_cipher |= wpa_selector_to_bitfield(pos); 2115 pos += WPA_SELECTOR_LEN; 2116 left -= WPA_SELECTOR_LEN; 2117 } 2118 } else if (left == 1) { 2119 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", 2120 __func__); 2121 return -5; 2122 } 2123 2124 if (left >= 2) { 2125 data->key_mgmt = 0; 2126 count = WPA_GET_LE16(pos); 2127 pos += 2; 2128 left -= 2; 2129 if (count == 0 || count > left / WPA_SELECTOR_LEN) { 2130 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " 2131 "count %u left %u", __func__, count, left); 2132 return -6; 2133 } 2134 for (i = 0; i < count; i++) { 2135 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos); 2136 pos += WPA_SELECTOR_LEN; 2137 left -= WPA_SELECTOR_LEN; 2138 } 2139 } else if (left == 1) { 2140 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", 2141 __func__); 2142 return -7; 2143 } 2144 2145 if (left >= 2) { 2146 data->capabilities = WPA_GET_LE16(pos); 2147 pos += 2; 2148 left -= 2; 2149 } 2150 2151 if (left > 0) { 2152 wpa_hexdump(MSG_DEBUG, 2153 "wpa_parse_wpa_ie_wpa: ignore trailing bytes", 2154 pos, left); 2155 } 2156 2157 return 0; 2158 } 2159 2160 2161 int wpa_default_rsn_cipher(int freq) 2162 { 2163 if (freq > 56160) 2164 return WPA_CIPHER_GCMP; /* DMG */ 2165 2166 return WPA_CIPHER_CCMP; 2167 } 2168 2169 2170 #ifdef CONFIG_IEEE80211R 2171 2172 /** 2173 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name 2174 * 2175 * IEEE Std 802.11r-2008 - 8.5.1.5.3 2176 */ 2177 int wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len, 2178 const u8 *ssid, size_t ssid_len, 2179 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len, 2180 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name, 2181 int key_mgmt) 2182 { 2183 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 + 2184 FT_R0KH_ID_MAX_LEN + ETH_ALEN]; 2185 u8 *pos, r0_key_data[64 + 16], hash[64]; 2186 const u8 *addr[2]; 2187 size_t len[2]; 2188 size_t q, r0_key_data_len; 2189 int res; 2190 2191 if (key_mgmt == WPA_KEY_MGMT_FT_SAE_EXT_KEY && 2192 (xxkey_len == SHA256_MAC_LEN || xxkey_len == SHA384_MAC_LEN || 2193 xxkey_len == SHA512_MAC_LEN)) 2194 q = xxkey_len; 2195 else if (wpa_key_mgmt_sha384(key_mgmt)) 2196 q = SHA384_MAC_LEN; 2197 else 2198 q = SHA256_MAC_LEN; 2199 r0_key_data_len = q + 16; 2200 2201 /* 2202 * R0-Key-Data = KDF-Hash-Length(XXKey, "FT-R0", 2203 * SSIDlength || SSID || MDID || R0KHlength || 2204 * R0KH-ID || S0KH-ID) 2205 * XXKey is either the second 256 bits of MSK or PSK; or the first 2206 * 384 bits of MSK for FT-EAP-SHA384; or PMK from SAE. 2207 * PMK-R0 = L(R0-Key-Data, 0, Q) 2208 * PMK-R0Name-Salt = L(R0-Key-Data, Q, 128) 2209 * Q = 384 for FT-EAP-SHA384; the length of the digest generated by H() 2210 * for FT-SAE-EXT-KEY; or otherwise, 256 2211 */ 2212 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN) 2213 return -1; 2214 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R0 using KDF-SHA%zu", q * 8); 2215 wpa_hexdump_key(MSG_DEBUG, "FT: XXKey", xxkey, xxkey_len); 2216 wpa_hexdump_ascii(MSG_DEBUG, "FT: SSID", ssid, ssid_len); 2217 wpa_hexdump(MSG_DEBUG, "FT: MDID", mdid, MOBILITY_DOMAIN_ID_LEN); 2218 wpa_hexdump_ascii(MSG_DEBUG, "FT: R0KH-ID", r0kh_id, r0kh_id_len); 2219 wpa_printf(MSG_DEBUG, "FT: S0KH-ID: " MACSTR, MAC2STR(s0kh_id)); 2220 pos = buf; 2221 *pos++ = ssid_len; 2222 os_memcpy(pos, ssid, ssid_len); 2223 pos += ssid_len; 2224 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN); 2225 pos += MOBILITY_DOMAIN_ID_LEN; 2226 *pos++ = r0kh_id_len; 2227 os_memcpy(pos, r0kh_id, r0kh_id_len); 2228 pos += r0kh_id_len; 2229 os_memcpy(pos, s0kh_id, ETH_ALEN); 2230 pos += ETH_ALEN; 2231 2232 res = -1; 2233 #ifdef CONFIG_SHA512 2234 if (q == SHA512_MAC_LEN) { 2235 if (xxkey_len != SHA512_MAC_LEN) { 2236 wpa_printf(MSG_ERROR, 2237 "FT: Unexpected XXKey length %d (expected %d)", 2238 (int) xxkey_len, SHA512_MAC_LEN); 2239 return -1; 2240 } 2241 res = sha512_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, 2242 r0_key_data, r0_key_data_len); 2243 } 2244 #endif /* CONFIG_SHA512 */ 2245 #ifdef CONFIG_SHA384 2246 if (q == SHA384_MAC_LEN) { 2247 if (xxkey_len != SHA384_MAC_LEN) { 2248 wpa_printf(MSG_ERROR, 2249 "FT: Unexpected XXKey length %d (expected %d)", 2250 (int) xxkey_len, SHA384_MAC_LEN); 2251 return -1; 2252 } 2253 res = sha384_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, 2254 r0_key_data, r0_key_data_len); 2255 } 2256 #endif /* CONFIG_SHA384 */ 2257 if (q == SHA256_MAC_LEN) { 2258 if (xxkey_len != PMK_LEN) { 2259 wpa_printf(MSG_ERROR, 2260 "FT: Unexpected XXKey length %d (expected %d)", 2261 (int) xxkey_len, PMK_LEN); 2262 return -1; 2263 } 2264 res = sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, 2265 r0_key_data, r0_key_data_len); 2266 } 2267 if (res < 0) 2268 return res; 2269 os_memcpy(pmk_r0, r0_key_data, q); 2270 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, q); 2271 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0Name-Salt", &r0_key_data[q], 16); 2272 2273 /* 2274 * PMKR0Name = Truncate-128(Hash("FT-R0N" || PMK-R0Name-Salt) 2275 */ 2276 addr[0] = (const u8 *) "FT-R0N"; 2277 len[0] = 6; 2278 addr[1] = &r0_key_data[q]; 2279 len[1] = 16; 2280 2281 res = -1; 2282 #ifdef CONFIG_SHA512 2283 if (q == SHA512_MAC_LEN) 2284 res = sha512_vector(2, addr, len, hash); 2285 #endif /* CONFIG_SHA512 */ 2286 #ifdef CONFIG_SHA384 2287 if (q == SHA384_MAC_LEN) 2288 res = sha384_vector(2, addr, len, hash); 2289 #endif /* CONFIG_SHA384 */ 2290 if (q == SHA256_MAC_LEN) 2291 res = sha256_vector(2, addr, len, hash); 2292 if (res < 0) { 2293 wpa_printf(MSG_DEBUG, 2294 "FT: Failed to derive PMKR0Name (PMK-R0 len %zu)", 2295 q); 2296 return res; 2297 } 2298 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN); 2299 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN); 2300 forced_memzero(r0_key_data, sizeof(r0_key_data)); 2301 return 0; 2302 } 2303 2304 2305 /** 2306 * wpa_derive_pmk_r1_name - Derive PMKR1Name 2307 * 2308 * IEEE Std 802.11r-2008 - 8.5.1.5.4 2309 */ 2310 int wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id, 2311 const u8 *s1kh_id, u8 *pmk_r1_name, 2312 size_t pmk_r1_len) 2313 { 2314 u8 hash[64]; 2315 const u8 *addr[4]; 2316 size_t len[4]; 2317 int res; 2318 const char *title; 2319 2320 /* 2321 * PMKR1Name = Truncate-128(Hash("FT-R1N" || PMKR0Name || 2322 * R1KH-ID || S1KH-ID)) 2323 */ 2324 addr[0] = (const u8 *) "FT-R1N"; 2325 len[0] = 6; 2326 addr[1] = pmk_r0_name; 2327 len[1] = WPA_PMK_NAME_LEN; 2328 addr[2] = r1kh_id; 2329 len[2] = FT_R1KH_ID_LEN; 2330 addr[3] = s1kh_id; 2331 len[3] = ETH_ALEN; 2332 2333 res = -1; 2334 #ifdef CONFIG_SHA512 2335 if (pmk_r1_len == SHA512_MAC_LEN) { 2336 title = "FT: PMKR1Name (using SHA512)"; 2337 res = sha512_vector(4, addr, len, hash); 2338 } 2339 #endif /* CONFIG_SHA512 */ 2340 #ifdef CONFIG_SHA384 2341 if (pmk_r1_len == SHA384_MAC_LEN) { 2342 title = "FT: PMKR1Name (using SHA384)"; 2343 res = sha384_vector(4, addr, len, hash); 2344 } 2345 #endif /* CONFIG_SHA384 */ 2346 if (pmk_r1_len == SHA256_MAC_LEN) { 2347 title = "FT: PMKR1Name (using SHA256)"; 2348 res = sha256_vector(4, addr, len, hash); 2349 } 2350 if (res < 0) { 2351 wpa_printf(MSG_DEBUG, 2352 "FT: Failed to derive PMKR1Name (PMK-R1 len %zu)", 2353 pmk_r1_len); 2354 return res; 2355 } 2356 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN); 2357 wpa_hexdump(MSG_DEBUG, title, pmk_r1_name, WPA_PMK_NAME_LEN); 2358 return 0; 2359 } 2360 2361 2362 /** 2363 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0 2364 * 2365 * IEEE Std 802.11r-2008 - 8.5.1.5.4 2366 */ 2367 int wpa_derive_pmk_r1(const u8 *pmk_r0, size_t pmk_r0_len, 2368 const u8 *pmk_r0_name, 2369 const u8 *r1kh_id, const u8 *s1kh_id, 2370 u8 *pmk_r1, u8 *pmk_r1_name) 2371 { 2372 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN]; 2373 u8 *pos; 2374 int res; 2375 2376 /* PMK-R1 = KDF-Hash(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */ 2377 wpa_printf(MSG_DEBUG, "FT: Derive PMK-R1 using KDF-SHA%zu", 2378 pmk_r0_len * 8); 2379 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len); 2380 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", r1kh_id, FT_R1KH_ID_LEN); 2381 wpa_printf(MSG_DEBUG, "FT: S1KH-ID: " MACSTR, MAC2STR(s1kh_id)); 2382 pos = buf; 2383 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN); 2384 pos += FT_R1KH_ID_LEN; 2385 os_memcpy(pos, s1kh_id, ETH_ALEN); 2386 pos += ETH_ALEN; 2387 2388 res = -1; 2389 #ifdef CONFIG_SHA512 2390 if (pmk_r0_len == SHA512_MAC_LEN) 2391 res = sha512_prf(pmk_r0, pmk_r0_len, "FT-R1", 2392 buf, pos - buf, pmk_r1, pmk_r0_len); 2393 #endif /* CONFIG_SHA512 */ 2394 #ifdef CONFIG_SHA384 2395 if (pmk_r0_len == SHA384_MAC_LEN) 2396 res = sha384_prf(pmk_r0, pmk_r0_len, "FT-R1", 2397 buf, pos - buf, pmk_r1, pmk_r0_len); 2398 #endif /* CONFIG_SHA384 */ 2399 if (pmk_r0_len == SHA256_MAC_LEN) 2400 res = sha256_prf(pmk_r0, pmk_r0_len, "FT-R1", 2401 buf, pos - buf, pmk_r1, pmk_r0_len); 2402 if (res < 0) { 2403 wpa_printf(MSG_ERROR, "FT: Failed to derive PMK-R1"); 2404 return res; 2405 } 2406 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r0_len); 2407 2408 return wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, 2409 pmk_r1_name, pmk_r0_len); 2410 } 2411 2412 2413 /** 2414 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1 2415 * 2416 * IEEE Std 802.11r-2008 - 8.5.1.5.5 2417 */ 2418 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, size_t pmk_r1_len, 2419 const u8 *snonce, const u8 *anonce, 2420 const u8 *sta_addr, const u8 *bssid, 2421 const u8 *pmk_r1_name, 2422 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher, 2423 size_t kdk_len) 2424 { 2425 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN]; 2426 u8 *pos, hash[32]; 2427 const u8 *addr[6]; 2428 size_t len[6]; 2429 u8 tmp[2 * WPA_KCK_MAX_LEN + 2 * WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + 2430 WPA_KDK_MAX_LEN]; 2431 size_t ptk_len, offset; 2432 size_t key_len; 2433 int res; 2434 2435 if (kdk_len > WPA_KDK_MAX_LEN) { 2436 wpa_printf(MSG_ERROR, 2437 "FT: KDK len=%zu exceeds max supported len", 2438 kdk_len); 2439 return -1; 2440 } 2441 2442 if (akmp == WPA_KEY_MGMT_FT_SAE_EXT_KEY && 2443 (pmk_r1_len == SHA256_MAC_LEN || pmk_r1_len == SHA384_MAC_LEN || 2444 pmk_r1_len == SHA512_MAC_LEN)) 2445 key_len = pmk_r1_len; 2446 else if (wpa_key_mgmt_sha384(akmp)) 2447 key_len = SHA384_MAC_LEN; 2448 else 2449 key_len = SHA256_MAC_LEN; 2450 2451 /* 2452 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce || 2453 * BSSID || STA-ADDR) 2454 */ 2455 wpa_printf(MSG_DEBUG, "FT: Derive PTK using KDF-SHA%zu", key_len * 8); 2456 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len); 2457 wpa_hexdump(MSG_DEBUG, "FT: SNonce", snonce, WPA_NONCE_LEN); 2458 wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN); 2459 wpa_printf(MSG_DEBUG, "FT: BSSID=" MACSTR " STA-ADDR=" MACSTR, 2460 MAC2STR(bssid), MAC2STR(sta_addr)); 2461 pos = buf; 2462 os_memcpy(pos, snonce, WPA_NONCE_LEN); 2463 pos += WPA_NONCE_LEN; 2464 os_memcpy(pos, anonce, WPA_NONCE_LEN); 2465 pos += WPA_NONCE_LEN; 2466 os_memcpy(pos, bssid, ETH_ALEN); 2467 pos += ETH_ALEN; 2468 os_memcpy(pos, sta_addr, ETH_ALEN); 2469 pos += ETH_ALEN; 2470 2471 ptk->kck_len = wpa_kck_len(akmp, key_len); 2472 ptk->kck2_len = wpa_kck2_len(akmp); 2473 ptk->kek_len = wpa_kek_len(akmp, key_len); 2474 ptk->kek2_len = wpa_kek2_len(akmp); 2475 ptk->tk_len = wpa_cipher_key_len(cipher); 2476 ptk->kdk_len = kdk_len; 2477 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + 2478 ptk->kck2_len + ptk->kek2_len + ptk->kdk_len; 2479 2480 res = -1; 2481 #ifdef CONFIG_SHA512 2482 if (key_len == SHA512_MAC_LEN) { 2483 if (pmk_r1_len != SHA512_MAC_LEN) { 2484 wpa_printf(MSG_ERROR, 2485 "FT: Unexpected PMK-R1 length %d (expected %d)", 2486 (int) pmk_r1_len, SHA512_MAC_LEN); 2487 return -1; 2488 } 2489 res = sha512_prf(pmk_r1, pmk_r1_len, "FT-PTK", 2490 buf, pos - buf, tmp, ptk_len); 2491 } 2492 #endif /* CONFIG_SHA512 */ 2493 #ifdef CONFIG_SHA384 2494 if (key_len == SHA384_MAC_LEN) { 2495 if (pmk_r1_len != SHA384_MAC_LEN) { 2496 wpa_printf(MSG_ERROR, 2497 "FT: Unexpected PMK-R1 length %d (expected %d)", 2498 (int) pmk_r1_len, SHA384_MAC_LEN); 2499 return -1; 2500 } 2501 res = sha384_prf(pmk_r1, pmk_r1_len, "FT-PTK", 2502 buf, pos - buf, tmp, ptk_len); 2503 } 2504 #endif /* CONFIG_SHA384 */ 2505 if (key_len == SHA256_MAC_LEN) { 2506 if (pmk_r1_len != PMK_LEN) { 2507 wpa_printf(MSG_ERROR, 2508 "FT: Unexpected PMK-R1 length %d (expected %d)", 2509 (int) pmk_r1_len, PMK_LEN); 2510 return -1; 2511 } 2512 res = sha256_prf(pmk_r1, pmk_r1_len, "FT-PTK", 2513 buf, pos - buf, tmp, ptk_len); 2514 } 2515 if (res < 0) 2516 return -1; 2517 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", tmp, ptk_len); 2518 2519 /* 2520 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce || 2521 * ANonce || BSSID || STA-ADDR)) 2522 */ 2523 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN); 2524 addr[0] = pmk_r1_name; 2525 len[0] = WPA_PMK_NAME_LEN; 2526 addr[1] = (const u8 *) "FT-PTKN"; 2527 len[1] = 7; 2528 addr[2] = snonce; 2529 len[2] = WPA_NONCE_LEN; 2530 addr[3] = anonce; 2531 len[3] = WPA_NONCE_LEN; 2532 addr[4] = bssid; 2533 len[4] = ETH_ALEN; 2534 addr[5] = sta_addr; 2535 len[5] = ETH_ALEN; 2536 2537 if (sha256_vector(6, addr, len, hash) < 0) 2538 return -1; 2539 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN); 2540 2541 os_memcpy(ptk->kck, tmp, ptk->kck_len); 2542 offset = ptk->kck_len; 2543 os_memcpy(ptk->kek, tmp + offset, ptk->kek_len); 2544 offset += ptk->kek_len; 2545 os_memcpy(ptk->tk, tmp + offset, ptk->tk_len); 2546 offset += ptk->tk_len; 2547 os_memcpy(ptk->kck2, tmp + offset, ptk->kck2_len); 2548 offset += ptk->kck2_len; 2549 os_memcpy(ptk->kek2, tmp + offset, ptk->kek2_len); 2550 offset += ptk->kek2_len; 2551 os_memcpy(ptk->kdk, tmp + offset, ptk->kdk_len); 2552 2553 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len); 2554 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len); 2555 if (ptk->kck2_len) 2556 wpa_hexdump_key(MSG_DEBUG, "FT: KCK2", 2557 ptk->kck2, ptk->kck2_len); 2558 if (ptk->kek2_len) 2559 wpa_hexdump_key(MSG_DEBUG, "FT: KEK2", 2560 ptk->kek2, ptk->kek2_len); 2561 if (ptk->kdk_len) 2562 wpa_hexdump_key(MSG_DEBUG, "FT: KDK", ptk->kdk, ptk->kdk_len); 2563 2564 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len); 2565 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN); 2566 2567 forced_memzero(tmp, sizeof(tmp)); 2568 2569 return 0; 2570 } 2571 2572 #endif /* CONFIG_IEEE80211R */ 2573 2574 2575 /** 2576 * rsn_pmkid - Calculate PMK identifier 2577 * @pmk: Pairwise master key 2578 * @pmk_len: Length of pmk in bytes 2579 * @aa: Authenticator address 2580 * @spa: Supplicant address 2581 * @pmkid: Buffer for PMKID 2582 * @akmp: Negotiated key management protocol 2583 * 2584 * IEEE Std 802.11-2016 - 12.7.1.3 Pairwise key hierarchy 2585 * AKM: 00-0F-AC:3, 00-0F-AC:5, 00-0F-AC:6, 00-0F-AC:14, 00-0F-AC:16 2586 * PMKID = Truncate-128(HMAC-SHA-256(PMK, "PMK Name" || AA || SPA)) 2587 * AKM: 00-0F-AC:11 2588 * See rsn_pmkid_suite_b() 2589 * AKM: 00-0F-AC:12 2590 * See rsn_pmkid_suite_b_192() 2591 * AKM: 00-0F-AC:13, 00-0F-AC:15, 00-0F-AC:17 2592 * PMKID = Truncate-128(HMAC-SHA-384(PMK, "PMK Name" || AA || SPA)) 2593 * Otherwise: 2594 * PMKID = Truncate-128(HMAC-SHA-1(PMK, "PMK Name" || AA || SPA)) 2595 */ 2596 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa, 2597 u8 *pmkid, int akmp) 2598 { 2599 char *title = "PMK Name"; 2600 const u8 *addr[3]; 2601 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; 2602 unsigned char hash[SHA384_MAC_LEN]; 2603 2604 addr[0] = (u8 *) title; 2605 addr[1] = aa; 2606 addr[2] = spa; 2607 2608 if (0) { 2609 #if defined(CONFIG_FILS) || defined(CONFIG_SHA384) 2610 } else if (wpa_key_mgmt_sha384(akmp)) { 2611 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-384"); 2612 hmac_sha384_vector(pmk, pmk_len, 3, addr, len, hash); 2613 #endif /* CONFIG_FILS || CONFIG_SHA384 */ 2614 } else if (wpa_key_mgmt_sha256(akmp)) { 2615 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-256"); 2616 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash); 2617 } else { 2618 wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-1"); 2619 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash); 2620 } 2621 wpa_hexdump(MSG_DEBUG, "RSN: Derived PMKID", hash, PMKID_LEN); 2622 os_memcpy(pmkid, hash, PMKID_LEN); 2623 } 2624 2625 2626 #ifdef CONFIG_SUITEB 2627 /** 2628 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM 2629 * @kck: Key confirmation key 2630 * @kck_len: Length of kck in bytes 2631 * @aa: Authenticator address 2632 * @spa: Supplicant address 2633 * @pmkid: Buffer for PMKID 2634 * Returns: 0 on success, -1 on failure 2635 * 2636 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy 2637 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA)) 2638 */ 2639 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa, 2640 const u8 *spa, u8 *pmkid) 2641 { 2642 char *title = "PMK Name"; 2643 const u8 *addr[3]; 2644 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; 2645 unsigned char hash[SHA256_MAC_LEN]; 2646 2647 addr[0] = (u8 *) title; 2648 addr[1] = aa; 2649 addr[2] = spa; 2650 2651 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0) 2652 return -1; 2653 os_memcpy(pmkid, hash, PMKID_LEN); 2654 return 0; 2655 } 2656 #endif /* CONFIG_SUITEB */ 2657 2658 2659 #ifdef CONFIG_SUITEB192 2660 /** 2661 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM 2662 * @kck: Key confirmation key 2663 * @kck_len: Length of kck in bytes 2664 * @aa: Authenticator address 2665 * @spa: Supplicant address 2666 * @pmkid: Buffer for PMKID 2667 * Returns: 0 on success, -1 on failure 2668 * 2669 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy 2670 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA)) 2671 */ 2672 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa, 2673 const u8 *spa, u8 *pmkid) 2674 { 2675 char *title = "PMK Name"; 2676 const u8 *addr[3]; 2677 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; 2678 unsigned char hash[SHA384_MAC_LEN]; 2679 2680 addr[0] = (u8 *) title; 2681 addr[1] = aa; 2682 addr[2] = spa; 2683 2684 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0) 2685 return -1; 2686 os_memcpy(pmkid, hash, PMKID_LEN); 2687 return 0; 2688 } 2689 #endif /* CONFIG_SUITEB192 */ 2690 2691 2692 /** 2693 * wpa_cipher_txt - Convert cipher suite to a text string 2694 * @cipher: Cipher suite (WPA_CIPHER_* enum) 2695 * Returns: Pointer to a text string of the cipher suite name 2696 */ 2697 const char * wpa_cipher_txt(int cipher) 2698 { 2699 switch (cipher) { 2700 case WPA_CIPHER_NONE: 2701 return "NONE"; 2702 #ifdef CONFIG_WEP 2703 case WPA_CIPHER_WEP40: 2704 return "WEP-40"; 2705 case WPA_CIPHER_WEP104: 2706 return "WEP-104"; 2707 #endif /* CONFIG_WEP */ 2708 case WPA_CIPHER_TKIP: 2709 return "TKIP"; 2710 case WPA_CIPHER_CCMP: 2711 return "CCMP"; 2712 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP: 2713 return "CCMP+TKIP"; 2714 case WPA_CIPHER_GCMP: 2715 return "GCMP"; 2716 case WPA_CIPHER_GCMP_256: 2717 return "GCMP-256"; 2718 case WPA_CIPHER_CCMP_256: 2719 return "CCMP-256"; 2720 case WPA_CIPHER_AES_128_CMAC: 2721 return "BIP"; 2722 case WPA_CIPHER_BIP_GMAC_128: 2723 return "BIP-GMAC-128"; 2724 case WPA_CIPHER_BIP_GMAC_256: 2725 return "BIP-GMAC-256"; 2726 case WPA_CIPHER_BIP_CMAC_256: 2727 return "BIP-CMAC-256"; 2728 case WPA_CIPHER_GTK_NOT_USED: 2729 return "GTK_NOT_USED"; 2730 default: 2731 return "UNKNOWN"; 2732 } 2733 } 2734 2735 2736 /** 2737 * wpa_key_mgmt_txt - Convert key management suite to a text string 2738 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum) 2739 * @proto: WPA/WPA2 version (WPA_PROTO_*) 2740 * Returns: Pointer to a text string of the key management suite name 2741 */ 2742 const char * wpa_key_mgmt_txt(int key_mgmt, int proto) 2743 { 2744 switch (key_mgmt) { 2745 case WPA_KEY_MGMT_IEEE8021X: 2746 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA)) 2747 return "WPA2+WPA/IEEE 802.1X/EAP"; 2748 return proto == WPA_PROTO_RSN ? 2749 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP"; 2750 case WPA_KEY_MGMT_PSK: 2751 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA)) 2752 return "WPA2-PSK+WPA-PSK"; 2753 return proto == WPA_PROTO_RSN ? 2754 "WPA2-PSK" : "WPA-PSK"; 2755 case WPA_KEY_MGMT_NONE: 2756 return "NONE"; 2757 case WPA_KEY_MGMT_WPA_NONE: 2758 return "WPA-NONE"; 2759 case WPA_KEY_MGMT_IEEE8021X_NO_WPA: 2760 return "IEEE 802.1X (no WPA)"; 2761 #ifdef CONFIG_IEEE80211R 2762 case WPA_KEY_MGMT_FT_IEEE8021X: 2763 return "FT-EAP"; 2764 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 2765 return "FT-EAP-SHA384"; 2766 case WPA_KEY_MGMT_FT_PSK: 2767 return "FT-PSK"; 2768 #endif /* CONFIG_IEEE80211R */ 2769 case WPA_KEY_MGMT_IEEE8021X_SHA256: 2770 return "WPA2-EAP-SHA256"; 2771 case WPA_KEY_MGMT_PSK_SHA256: 2772 return "WPA2-PSK-SHA256"; 2773 case WPA_KEY_MGMT_WPS: 2774 return "WPS"; 2775 case WPA_KEY_MGMT_SAE: 2776 return "SAE"; 2777 case WPA_KEY_MGMT_SAE_EXT_KEY: 2778 return "SAE-EXT-KEY"; 2779 case WPA_KEY_MGMT_FT_SAE: 2780 return "FT-SAE"; 2781 case WPA_KEY_MGMT_FT_SAE_EXT_KEY: 2782 return "FT-SAE-EXT-KEY"; 2783 case WPA_KEY_MGMT_OSEN: 2784 return "OSEN"; 2785 case WPA_KEY_MGMT_IEEE8021X_SUITE_B: 2786 return "WPA2-EAP-SUITE-B"; 2787 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 2788 return "WPA2-EAP-SUITE-B-192"; 2789 case WPA_KEY_MGMT_FILS_SHA256: 2790 return "FILS-SHA256"; 2791 case WPA_KEY_MGMT_FILS_SHA384: 2792 return "FILS-SHA384"; 2793 case WPA_KEY_MGMT_FT_FILS_SHA256: 2794 return "FT-FILS-SHA256"; 2795 case WPA_KEY_MGMT_FT_FILS_SHA384: 2796 return "FT-FILS-SHA384"; 2797 case WPA_KEY_MGMT_OWE: 2798 return "OWE"; 2799 case WPA_KEY_MGMT_DPP: 2800 return "DPP"; 2801 case WPA_KEY_MGMT_PASN: 2802 return "PASN"; 2803 case WPA_KEY_MGMT_IEEE8021X_SHA384: 2804 return "WPA2-EAP-SHA384"; 2805 default: 2806 return "UNKNOWN"; 2807 } 2808 } 2809 2810 2811 u32 wpa_akm_to_suite(int akm) 2812 { 2813 if (akm & WPA_KEY_MGMT_FT_IEEE8021X_SHA384) 2814 return RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384; 2815 if (akm & WPA_KEY_MGMT_FT_IEEE8021X) 2816 return RSN_AUTH_KEY_MGMT_FT_802_1X; 2817 if (akm & WPA_KEY_MGMT_FT_PSK) 2818 return RSN_AUTH_KEY_MGMT_FT_PSK; 2819 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA384) 2820 return RSN_AUTH_KEY_MGMT_802_1X_SHA384; 2821 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256) 2822 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 2823 if (akm & WPA_KEY_MGMT_IEEE8021X) 2824 return RSN_AUTH_KEY_MGMT_UNSPEC_802_1X; 2825 if (akm & WPA_KEY_MGMT_PSK_SHA256) 2826 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 2827 if (akm & WPA_KEY_MGMT_PSK) 2828 return RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X; 2829 if (akm & WPA_KEY_MGMT_CCKM) 2830 return RSN_AUTH_KEY_MGMT_CCKM; 2831 if (akm & WPA_KEY_MGMT_OSEN) 2832 return RSN_AUTH_KEY_MGMT_OSEN; 2833 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B) 2834 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; 2835 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) 2836 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; 2837 if (akm & WPA_KEY_MGMT_FILS_SHA256) 2838 return RSN_AUTH_KEY_MGMT_FILS_SHA256; 2839 if (akm & WPA_KEY_MGMT_FILS_SHA384) 2840 return RSN_AUTH_KEY_MGMT_FILS_SHA384; 2841 if (akm & WPA_KEY_MGMT_FT_FILS_SHA256) 2842 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA256; 2843 if (akm & WPA_KEY_MGMT_FT_FILS_SHA384) 2844 return RSN_AUTH_KEY_MGMT_FT_FILS_SHA384; 2845 if (akm & WPA_KEY_MGMT_SAE) 2846 return RSN_AUTH_KEY_MGMT_SAE; 2847 if (akm & WPA_KEY_MGMT_SAE_EXT_KEY) 2848 return RSN_AUTH_KEY_MGMT_SAE_EXT_KEY; 2849 if (akm & WPA_KEY_MGMT_FT_SAE) 2850 return RSN_AUTH_KEY_MGMT_FT_SAE; 2851 if (akm & WPA_KEY_MGMT_FT_SAE_EXT_KEY) 2852 return RSN_AUTH_KEY_MGMT_FT_SAE_EXT_KEY; 2853 if (akm & WPA_KEY_MGMT_OWE) 2854 return RSN_AUTH_KEY_MGMT_OWE; 2855 if (akm & WPA_KEY_MGMT_DPP) 2856 return RSN_AUTH_KEY_MGMT_DPP; 2857 return 0; 2858 } 2859 2860 2861 int wpa_compare_rsn_ie(int ft_initial_assoc, 2862 const u8 *ie1, size_t ie1len, 2863 const u8 *ie2, size_t ie2len) 2864 { 2865 if (ie1 == NULL || ie2 == NULL) 2866 return -1; 2867 2868 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0) 2869 return 0; /* identical IEs */ 2870 2871 #ifdef CONFIG_IEEE80211R 2872 if (ft_initial_assoc) { 2873 struct wpa_ie_data ie1d, ie2d; 2874 /* 2875 * The PMKID-List in RSN IE is different between Beacon/Probe 2876 * Response/(Re)Association Request frames and EAPOL-Key 2877 * messages in FT initial mobility domain association. Allow 2878 * for this, but verify that other parts of the RSN IEs are 2879 * identical. 2880 */ 2881 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 || 2882 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0) 2883 return -1; 2884 if (ie1d.proto == ie2d.proto && 2885 ie1d.pairwise_cipher == ie2d.pairwise_cipher && 2886 ie1d.group_cipher == ie2d.group_cipher && 2887 ie1d.key_mgmt == ie2d.key_mgmt && 2888 ie1d.capabilities == ie2d.capabilities && 2889 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher) 2890 return 0; 2891 } 2892 #endif /* CONFIG_IEEE80211R */ 2893 2894 return -1; 2895 } 2896 2897 2898 int wpa_insert_pmkid(u8 *ies, size_t *ies_len, const u8 *pmkid, bool replace) 2899 { 2900 u8 *start, *end, *rpos, *rend; 2901 int added = 0; 2902 2903 start = ies; 2904 end = ies + *ies_len; 2905 2906 while (start < end) { 2907 if (*start == WLAN_EID_RSN) 2908 break; 2909 start += 2 + start[1]; 2910 } 2911 if (start >= end) { 2912 wpa_printf(MSG_ERROR, "RSN: Could not find RSNE in IEs data"); 2913 return -1; 2914 } 2915 wpa_hexdump(MSG_DEBUG, "RSN: RSNE before modification", 2916 start, 2 + start[1]); 2917 2918 /* Find start of PMKID-Count */ 2919 rpos = start + 2; 2920 rend = rpos + start[1]; 2921 2922 /* Skip Version and Group Data Cipher Suite */ 2923 rpos += 2 + 4; 2924 /* Skip Pairwise Cipher Suite Count and List */ 2925 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN; 2926 /* Skip AKM Suite Count and List */ 2927 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN; 2928 2929 if (rpos == rend) { 2930 /* Add RSN Capabilities */ 2931 os_memmove(rpos + 2, rpos, end - rpos); 2932 *rpos++ = 0; 2933 *rpos++ = 0; 2934 added += 2; 2935 start[1] += 2; 2936 rend = rpos; 2937 } else { 2938 /* Skip RSN Capabilities */ 2939 rpos += 2; 2940 if (rpos > rend) { 2941 wpa_printf(MSG_ERROR, 2942 "RSN: Could not parse RSNE in IEs data"); 2943 return -1; 2944 } 2945 } 2946 2947 if (rpos == rend) { 2948 /* No PMKID-Count field included; add it */ 2949 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos); 2950 WPA_PUT_LE16(rpos, 1); 2951 rpos += 2; 2952 os_memcpy(rpos, pmkid, PMKID_LEN); 2953 added += 2 + PMKID_LEN; 2954 start[1] += 2 + PMKID_LEN; 2955 } else { 2956 u16 num_pmkid; 2957 2958 if (rend - rpos < 2) 2959 return -1; 2960 num_pmkid = WPA_GET_LE16(rpos); 2961 if (num_pmkid * PMKID_LEN > rend - rpos - 2) 2962 return -1; 2963 /* PMKID-Count was included; use it */ 2964 if (replace && num_pmkid != 0) { 2965 u8 *after; 2966 2967 /* 2968 * PMKID may have been included in RSN IE in 2969 * (Re)Association Request frame, so remove the old 2970 * PMKID(s) first before adding the new one. 2971 */ 2972 wpa_printf(MSG_DEBUG, 2973 "RSN: Remove %u old PMKID(s) from RSNE", 2974 num_pmkid); 2975 after = rpos + 2 + num_pmkid * PMKID_LEN; 2976 os_memmove(rpos + 2, after, end - after); 2977 start[1] -= num_pmkid * PMKID_LEN; 2978 added -= num_pmkid * PMKID_LEN; 2979 num_pmkid = 0; 2980 } 2981 WPA_PUT_LE16(rpos, num_pmkid + 1); 2982 rpos += 2; 2983 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos); 2984 os_memcpy(rpos, pmkid, PMKID_LEN); 2985 added += PMKID_LEN; 2986 start[1] += PMKID_LEN; 2987 } 2988 2989 wpa_hexdump(MSG_DEBUG, "RSN: RSNE after modification (PMKID inserted)", 2990 start, 2 + start[1]); 2991 2992 *ies_len += added; 2993 2994 return 0; 2995 } 2996 2997 2998 int wpa_cipher_key_len(int cipher) 2999 { 3000 switch (cipher) { 3001 case WPA_CIPHER_CCMP_256: 3002 case WPA_CIPHER_GCMP_256: 3003 case WPA_CIPHER_BIP_GMAC_256: 3004 case WPA_CIPHER_BIP_CMAC_256: 3005 return 32; 3006 case WPA_CIPHER_CCMP: 3007 case WPA_CIPHER_GCMP: 3008 case WPA_CIPHER_AES_128_CMAC: 3009 case WPA_CIPHER_BIP_GMAC_128: 3010 return 16; 3011 case WPA_CIPHER_TKIP: 3012 return 32; 3013 default: 3014 return 0; 3015 } 3016 } 3017 3018 3019 int wpa_cipher_rsc_len(int cipher) 3020 { 3021 switch (cipher) { 3022 case WPA_CIPHER_CCMP_256: 3023 case WPA_CIPHER_GCMP_256: 3024 case WPA_CIPHER_CCMP: 3025 case WPA_CIPHER_GCMP: 3026 case WPA_CIPHER_TKIP: 3027 return 6; 3028 default: 3029 return 0; 3030 } 3031 } 3032 3033 3034 enum wpa_alg wpa_cipher_to_alg(int cipher) 3035 { 3036 switch (cipher) { 3037 case WPA_CIPHER_CCMP_256: 3038 return WPA_ALG_CCMP_256; 3039 case WPA_CIPHER_GCMP_256: 3040 return WPA_ALG_GCMP_256; 3041 case WPA_CIPHER_CCMP: 3042 return WPA_ALG_CCMP; 3043 case WPA_CIPHER_GCMP: 3044 return WPA_ALG_GCMP; 3045 case WPA_CIPHER_TKIP: 3046 return WPA_ALG_TKIP; 3047 case WPA_CIPHER_AES_128_CMAC: 3048 return WPA_ALG_BIP_CMAC_128; 3049 case WPA_CIPHER_BIP_GMAC_128: 3050 return WPA_ALG_BIP_GMAC_128; 3051 case WPA_CIPHER_BIP_GMAC_256: 3052 return WPA_ALG_BIP_GMAC_256; 3053 case WPA_CIPHER_BIP_CMAC_256: 3054 return WPA_ALG_BIP_CMAC_256; 3055 default: 3056 return WPA_ALG_NONE; 3057 } 3058 } 3059 3060 3061 int wpa_cipher_valid_pairwise(int cipher) 3062 { 3063 #ifdef CONFIG_NO_TKIP 3064 return cipher == WPA_CIPHER_CCMP_256 || 3065 cipher == WPA_CIPHER_GCMP_256 || 3066 cipher == WPA_CIPHER_CCMP || 3067 cipher == WPA_CIPHER_GCMP; 3068 #else /* CONFIG_NO_TKIP */ 3069 return cipher == WPA_CIPHER_CCMP_256 || 3070 cipher == WPA_CIPHER_GCMP_256 || 3071 cipher == WPA_CIPHER_CCMP || 3072 cipher == WPA_CIPHER_GCMP || 3073 cipher == WPA_CIPHER_TKIP; 3074 #endif /* CONFIG_NO_TKIP */ 3075 } 3076 3077 3078 u32 wpa_cipher_to_suite(int proto, int cipher) 3079 { 3080 if (cipher & WPA_CIPHER_CCMP_256) 3081 return RSN_CIPHER_SUITE_CCMP_256; 3082 if (cipher & WPA_CIPHER_GCMP_256) 3083 return RSN_CIPHER_SUITE_GCMP_256; 3084 if (cipher & WPA_CIPHER_CCMP) 3085 return (proto == WPA_PROTO_RSN ? 3086 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP); 3087 if (cipher & WPA_CIPHER_GCMP) 3088 return RSN_CIPHER_SUITE_GCMP; 3089 if (cipher & WPA_CIPHER_TKIP) 3090 return (proto == WPA_PROTO_RSN ? 3091 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP); 3092 if (cipher & WPA_CIPHER_NONE) 3093 return (proto == WPA_PROTO_RSN ? 3094 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE); 3095 if (cipher & WPA_CIPHER_GTK_NOT_USED) 3096 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED; 3097 if (cipher & WPA_CIPHER_AES_128_CMAC) 3098 return RSN_CIPHER_SUITE_AES_128_CMAC; 3099 if (cipher & WPA_CIPHER_BIP_GMAC_128) 3100 return RSN_CIPHER_SUITE_BIP_GMAC_128; 3101 if (cipher & WPA_CIPHER_BIP_GMAC_256) 3102 return RSN_CIPHER_SUITE_BIP_GMAC_256; 3103 if (cipher & WPA_CIPHER_BIP_CMAC_256) 3104 return RSN_CIPHER_SUITE_BIP_CMAC_256; 3105 return 0; 3106 } 3107 3108 3109 int rsn_cipher_put_suites(u8 *start, int ciphers) 3110 { 3111 u8 *pos = start; 3112 3113 if (ciphers & WPA_CIPHER_CCMP_256) { 3114 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256); 3115 pos += RSN_SELECTOR_LEN; 3116 } 3117 if (ciphers & WPA_CIPHER_GCMP_256) { 3118 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256); 3119 pos += RSN_SELECTOR_LEN; 3120 } 3121 if (ciphers & WPA_CIPHER_CCMP) { 3122 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); 3123 pos += RSN_SELECTOR_LEN; 3124 } 3125 if (ciphers & WPA_CIPHER_GCMP) { 3126 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP); 3127 pos += RSN_SELECTOR_LEN; 3128 } 3129 if (ciphers & WPA_CIPHER_TKIP) { 3130 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP); 3131 pos += RSN_SELECTOR_LEN; 3132 } 3133 if (ciphers & WPA_CIPHER_NONE) { 3134 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE); 3135 pos += RSN_SELECTOR_LEN; 3136 } 3137 3138 return (pos - start) / RSN_SELECTOR_LEN; 3139 } 3140 3141 3142 int wpa_cipher_put_suites(u8 *start, int ciphers) 3143 { 3144 u8 *pos = start; 3145 3146 if (ciphers & WPA_CIPHER_CCMP) { 3147 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP); 3148 pos += WPA_SELECTOR_LEN; 3149 } 3150 if (ciphers & WPA_CIPHER_TKIP) { 3151 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP); 3152 pos += WPA_SELECTOR_LEN; 3153 } 3154 if (ciphers & WPA_CIPHER_NONE) { 3155 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE); 3156 pos += WPA_SELECTOR_LEN; 3157 } 3158 3159 return (pos - start) / RSN_SELECTOR_LEN; 3160 } 3161 3162 3163 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed) 3164 { 3165 if (ciphers & WPA_CIPHER_CCMP_256) 3166 return WPA_CIPHER_CCMP_256; 3167 if (ciphers & WPA_CIPHER_GCMP_256) 3168 return WPA_CIPHER_GCMP_256; 3169 if (ciphers & WPA_CIPHER_CCMP) 3170 return WPA_CIPHER_CCMP; 3171 if (ciphers & WPA_CIPHER_GCMP) 3172 return WPA_CIPHER_GCMP; 3173 if (ciphers & WPA_CIPHER_TKIP) 3174 return WPA_CIPHER_TKIP; 3175 if (none_allowed && (ciphers & WPA_CIPHER_NONE)) 3176 return WPA_CIPHER_NONE; 3177 return -1; 3178 } 3179 3180 3181 int wpa_pick_group_cipher(int ciphers) 3182 { 3183 if (ciphers & WPA_CIPHER_CCMP_256) 3184 return WPA_CIPHER_CCMP_256; 3185 if (ciphers & WPA_CIPHER_GCMP_256) 3186 return WPA_CIPHER_GCMP_256; 3187 if (ciphers & WPA_CIPHER_CCMP) 3188 return WPA_CIPHER_CCMP; 3189 if (ciphers & WPA_CIPHER_GCMP) 3190 return WPA_CIPHER_GCMP; 3191 if (ciphers & WPA_CIPHER_GTK_NOT_USED) 3192 return WPA_CIPHER_GTK_NOT_USED; 3193 if (ciphers & WPA_CIPHER_TKIP) 3194 return WPA_CIPHER_TKIP; 3195 return -1; 3196 } 3197 3198 3199 int wpa_parse_cipher(const char *value) 3200 { 3201 int val = 0, last; 3202 char *start, *end, *buf; 3203 3204 buf = os_strdup(value); 3205 if (buf == NULL) 3206 return -1; 3207 start = buf; 3208 3209 while (*start != '\0') { 3210 while (*start == ' ' || *start == '\t') 3211 start++; 3212 if (*start == '\0') 3213 break; 3214 end = start; 3215 while (*end != ' ' && *end != '\t' && *end != '\0') 3216 end++; 3217 last = *end == '\0'; 3218 *end = '\0'; 3219 if (os_strcmp(start, "CCMP-256") == 0) 3220 val |= WPA_CIPHER_CCMP_256; 3221 else if (os_strcmp(start, "GCMP-256") == 0) 3222 val |= WPA_CIPHER_GCMP_256; 3223 else if (os_strcmp(start, "CCMP") == 0) 3224 val |= WPA_CIPHER_CCMP; 3225 else if (os_strcmp(start, "GCMP") == 0) 3226 val |= WPA_CIPHER_GCMP; 3227 #ifndef CONFIG_NO_TKIP 3228 else if (os_strcmp(start, "TKIP") == 0) 3229 val |= WPA_CIPHER_TKIP; 3230 #endif /* CONFIG_NO_TKIP */ 3231 #ifdef CONFIG_WEP 3232 else if (os_strcmp(start, "WEP104") == 0) 3233 val |= WPA_CIPHER_WEP104; 3234 else if (os_strcmp(start, "WEP40") == 0) 3235 val |= WPA_CIPHER_WEP40; 3236 #endif /* CONFIG_WEP */ 3237 else if (os_strcmp(start, "NONE") == 0) 3238 val |= WPA_CIPHER_NONE; 3239 else if (os_strcmp(start, "GTK_NOT_USED") == 0) 3240 val |= WPA_CIPHER_GTK_NOT_USED; 3241 else if (os_strcmp(start, "AES-128-CMAC") == 0) 3242 val |= WPA_CIPHER_AES_128_CMAC; 3243 else if (os_strcmp(start, "BIP-GMAC-128") == 0) 3244 val |= WPA_CIPHER_BIP_GMAC_128; 3245 else if (os_strcmp(start, "BIP-GMAC-256") == 0) 3246 val |= WPA_CIPHER_BIP_GMAC_256; 3247 else if (os_strcmp(start, "BIP-CMAC-256") == 0) 3248 val |= WPA_CIPHER_BIP_CMAC_256; 3249 else { 3250 os_free(buf); 3251 return -1; 3252 } 3253 3254 if (last) 3255 break; 3256 start = end + 1; 3257 } 3258 os_free(buf); 3259 3260 return val; 3261 } 3262 3263 3264 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim) 3265 { 3266 char *pos = start; 3267 int ret; 3268 3269 if (ciphers & WPA_CIPHER_CCMP_256) { 3270 ret = os_snprintf(pos, end - pos, "%sCCMP-256", 3271 pos == start ? "" : delim); 3272 if (os_snprintf_error(end - pos, ret)) 3273 return -1; 3274 pos += ret; 3275 } 3276 if (ciphers & WPA_CIPHER_GCMP_256) { 3277 ret = os_snprintf(pos, end - pos, "%sGCMP-256", 3278 pos == start ? "" : delim); 3279 if (os_snprintf_error(end - pos, ret)) 3280 return -1; 3281 pos += ret; 3282 } 3283 if (ciphers & WPA_CIPHER_CCMP) { 3284 ret = os_snprintf(pos, end - pos, "%sCCMP", 3285 pos == start ? "" : delim); 3286 if (os_snprintf_error(end - pos, ret)) 3287 return -1; 3288 pos += ret; 3289 } 3290 if (ciphers & WPA_CIPHER_GCMP) { 3291 ret = os_snprintf(pos, end - pos, "%sGCMP", 3292 pos == start ? "" : delim); 3293 if (os_snprintf_error(end - pos, ret)) 3294 return -1; 3295 pos += ret; 3296 } 3297 if (ciphers & WPA_CIPHER_TKIP) { 3298 ret = os_snprintf(pos, end - pos, "%sTKIP", 3299 pos == start ? "" : delim); 3300 if (os_snprintf_error(end - pos, ret)) 3301 return -1; 3302 pos += ret; 3303 } 3304 if (ciphers & WPA_CIPHER_AES_128_CMAC) { 3305 ret = os_snprintf(pos, end - pos, "%sAES-128-CMAC", 3306 pos == start ? "" : delim); 3307 if (os_snprintf_error(end - pos, ret)) 3308 return -1; 3309 pos += ret; 3310 } 3311 if (ciphers & WPA_CIPHER_BIP_GMAC_128) { 3312 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-128", 3313 pos == start ? "" : delim); 3314 if (os_snprintf_error(end - pos, ret)) 3315 return -1; 3316 pos += ret; 3317 } 3318 if (ciphers & WPA_CIPHER_BIP_GMAC_256) { 3319 ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-256", 3320 pos == start ? "" : delim); 3321 if (os_snprintf_error(end - pos, ret)) 3322 return -1; 3323 pos += ret; 3324 } 3325 if (ciphers & WPA_CIPHER_BIP_CMAC_256) { 3326 ret = os_snprintf(pos, end - pos, "%sBIP-CMAC-256", 3327 pos == start ? "" : delim); 3328 if (os_snprintf_error(end - pos, ret)) 3329 return -1; 3330 pos += ret; 3331 } 3332 if (ciphers & WPA_CIPHER_NONE) { 3333 ret = os_snprintf(pos, end - pos, "%sNONE", 3334 pos == start ? "" : delim); 3335 if (os_snprintf_error(end - pos, ret)) 3336 return -1; 3337 pos += ret; 3338 } 3339 3340 return pos - start; 3341 } 3342 3343 3344 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise) 3345 { 3346 int pairwise = 0; 3347 3348 /* Select group cipher based on the enabled pairwise cipher suites */ 3349 if (wpa & 1) 3350 pairwise |= wpa_pairwise; 3351 if (wpa & 2) 3352 pairwise |= rsn_pairwise; 3353 3354 if (pairwise & WPA_CIPHER_TKIP) 3355 return WPA_CIPHER_TKIP; 3356 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP) 3357 return WPA_CIPHER_GCMP; 3358 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP | 3359 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256) 3360 return WPA_CIPHER_GCMP_256; 3361 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP | 3362 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256) 3363 return WPA_CIPHER_CCMP_256; 3364 return WPA_CIPHER_CCMP; 3365 } 3366 3367 3368 #ifdef CONFIG_FILS 3369 int fils_domain_name_hash(const char *domain, u8 *hash) 3370 { 3371 char buf[255], *wpos = buf; 3372 const char *pos = domain; 3373 size_t len; 3374 const u8 *addr[1]; 3375 u8 mac[SHA256_MAC_LEN]; 3376 3377 for (len = 0; len < sizeof(buf) && *pos; len++) { 3378 if (isalpha(*pos) && isupper(*pos)) 3379 *wpos++ = tolower(*pos); 3380 else 3381 *wpos++ = *pos; 3382 pos++; 3383 } 3384 3385 addr[0] = (const u8 *) buf; 3386 if (sha256_vector(1, addr, &len, mac) < 0) 3387 return -1; 3388 os_memcpy(hash, mac, 2); 3389 return 0; 3390 } 3391 #endif /* CONFIG_FILS */ 3392 3393 3394 /** 3395 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 3396 * @pos: Pointer to the IE header 3397 * @end: Pointer to the end of the Key Data buffer 3398 * @ie: Pointer to parsed IE data 3399 */ 3400 static void wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 3401 struct wpa_eapol_ie_parse *ie) 3402 { 3403 unsigned int oui; 3404 3405 if (pos[1] < 4) { 3406 wpa_printf(MSG_MSGDUMP, 3407 "Too short vendor specific IE ignored (len=%u)", 3408 pos[1]); 3409 return; 3410 } 3411 3412 oui = WPA_GET_BE24(&pos[2]); 3413 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 3414 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 3415 ie->wmm = &pos[2]; 3416 ie->wmm_len = pos[1]; 3417 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 3418 ie->wmm, ie->wmm_len); 3419 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 3420 ie->wmm = &pos[2]; 3421 ie->wmm_len = pos[1]; 3422 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 3423 ie->wmm, ie->wmm_len); 3424 } 3425 } 3426 } 3427 3428 3429 /** 3430 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 3431 * @pos: Pointer to the IE header 3432 * @ie: Pointer to parsed IE data 3433 * Returns: 0 on success, 1 if end mark is found, 2 if KDE is not recognized 3434 */ 3435 static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie) 3436 { 3437 u8 len = pos[1]; 3438 size_t dlen = 2 + len; 3439 u32 selector; 3440 const u8 *p; 3441 size_t left; 3442 u8 link_id; 3443 char title[50]; 3444 int ret; 3445 3446 if (len == 0) 3447 return 1; 3448 3449 if (len < RSN_SELECTOR_LEN) 3450 return 2; 3451 3452 p = pos + 2; 3453 selector = RSN_SELECTOR_GET(p); 3454 p += RSN_SELECTOR_LEN; 3455 left = len - RSN_SELECTOR_LEN; 3456 3457 if (left >= 2 && selector == WPA_OUI_TYPE && p[0] == 1 && p[1] == 0) { 3458 ie->wpa_ie = pos; 3459 ie->wpa_ie_len = dlen; 3460 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 3461 ie->wpa_ie, ie->wpa_ie_len); 3462 return 0; 3463 } 3464 3465 if (selector == OSEN_IE_VENDOR_TYPE) { 3466 ie->osen = pos; 3467 ie->osen_len = dlen; 3468 return 0; 3469 } 3470 3471 if (left >= PMKID_LEN && selector == RSN_KEY_DATA_PMKID) { 3472 ie->pmkid = p; 3473 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key", pos, dlen); 3474 return 0; 3475 } 3476 3477 if (left >= 2 && selector == RSN_KEY_DATA_KEYID) { 3478 ie->key_id = p; 3479 wpa_hexdump(MSG_DEBUG, "WPA: KeyID in EAPOL-Key", pos, dlen); 3480 return 0; 3481 } 3482 3483 if (left > 2 && selector == RSN_KEY_DATA_GROUPKEY) { 3484 ie->gtk = p; 3485 ie->gtk_len = left; 3486 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key", pos, dlen); 3487 return 0; 3488 } 3489 3490 if (left >= ETH_ALEN && selector == RSN_KEY_DATA_MAC_ADDR) { 3491 ie->mac_addr = p; 3492 wpa_printf(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key: " MACSTR, 3493 MAC2STR(ie->mac_addr)); 3494 return 0; 3495 } 3496 3497 if (left > 2 && selector == RSN_KEY_DATA_IGTK) { 3498 ie->igtk = p; 3499 ie->igtk_len = left; 3500 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 3501 pos, dlen); 3502 return 0; 3503 } 3504 3505 if (left > 2 && selector == RSN_KEY_DATA_BIGTK) { 3506 ie->bigtk = p; 3507 ie->bigtk_len = left; 3508 wpa_hexdump_key(MSG_DEBUG, "WPA: BIGTK in EAPOL-Key", 3509 pos, dlen); 3510 return 0; 3511 } 3512 3513 if (left >= 1 && selector == WFA_KEY_DATA_IP_ADDR_REQ) { 3514 ie->ip_addr_req = p; 3515 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 3516 ie->ip_addr_req, left); 3517 return 0; 3518 } 3519 3520 if (left >= 3 * 4 && selector == WFA_KEY_DATA_IP_ADDR_ALLOC) { 3521 ie->ip_addr_alloc = p; 3522 wpa_hexdump(MSG_DEBUG, 3523 "WPA: IP Address Allocation in EAPOL-Key", 3524 ie->ip_addr_alloc, left); 3525 return 0; 3526 } 3527 3528 if (left > 2 && selector == RSN_KEY_DATA_OCI) { 3529 ie->oci = p; 3530 ie->oci_len = left; 3531 wpa_hexdump(MSG_DEBUG, "WPA: OCI KDE in EAPOL-Key", 3532 pos, dlen); 3533 return 0; 3534 } 3535 3536 if (left >= 1 && selector == WFA_KEY_DATA_TRANSITION_DISABLE) { 3537 ie->transition_disable = p; 3538 ie->transition_disable_len = left; 3539 wpa_hexdump(MSG_DEBUG, 3540 "WPA: Transition Disable KDE in EAPOL-Key", 3541 pos, dlen); 3542 return 0; 3543 } 3544 3545 if (left >= 2 && selector == WFA_KEY_DATA_DPP) { 3546 ie->dpp_kde = p; 3547 ie->dpp_kde_len = left; 3548 wpa_hexdump(MSG_DEBUG, "WPA: DPP KDE in EAPOL-Key", pos, dlen); 3549 return 0; 3550 } 3551 3552 if (left >= RSN_MLO_GTK_KDE_PREFIX_LENGTH && 3553 selector == RSN_KEY_DATA_MLO_GTK) { 3554 link_id = (p[0] & RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_MASK) >> 3555 RSN_MLO_GTK_KDE_PREFIX0_LINK_ID_SHIFT; 3556 if (link_id >= MAX_NUM_MLD_LINKS) 3557 return 2; 3558 3559 ie->valid_mlo_gtks |= BIT(link_id); 3560 ie->mlo_gtk[link_id] = p; 3561 ie->mlo_gtk_len[link_id] = left; 3562 ret = os_snprintf(title, sizeof(title), 3563 "RSN: Link ID %u - MLO GTK KDE in EAPOL-Key", 3564 link_id); 3565 if (!os_snprintf_error(sizeof(title), ret)) 3566 wpa_hexdump_key(MSG_DEBUG, title, pos, dlen); 3567 return 0; 3568 } 3569 3570 if (left >= RSN_MLO_IGTK_KDE_PREFIX_LENGTH && 3571 selector == RSN_KEY_DATA_MLO_IGTK) { 3572 link_id = (p[8] & RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_MASK) >> 3573 RSN_MLO_IGTK_KDE_PREFIX8_LINK_ID_SHIFT; 3574 if (link_id >= MAX_NUM_MLD_LINKS) 3575 return 2; 3576 3577 ie->valid_mlo_igtks |= BIT(link_id); 3578 ie->mlo_igtk[link_id] = p; 3579 ie->mlo_igtk_len[link_id] = left; 3580 ret = os_snprintf(title, sizeof(title), 3581 "RSN: Link ID %u - MLO IGTK KDE in EAPOL-Key", 3582 link_id); 3583 if (!os_snprintf_error(sizeof(title), ret)) 3584 wpa_hexdump_key(MSG_DEBUG, title, pos, dlen); 3585 return 0; 3586 } 3587 3588 if (left >= RSN_MLO_BIGTK_KDE_PREFIX_LENGTH && 3589 selector == RSN_KEY_DATA_MLO_BIGTK) { 3590 link_id = (p[8] & RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_MASK) >> 3591 RSN_MLO_BIGTK_KDE_PREFIX8_LINK_ID_SHIFT; 3592 if (link_id >= MAX_NUM_MLD_LINKS) 3593 return 2; 3594 3595 ie->valid_mlo_bigtks |= BIT(link_id); 3596 ie->mlo_bigtk[link_id] = p; 3597 ie->mlo_bigtk_len[link_id] = left; 3598 ret = os_snprintf(title, sizeof(title), 3599 "RSN: Link ID %u - MLO BIGTK KDE in EAPOL-Key", 3600 link_id); 3601 if (!os_snprintf_error(sizeof(title), ret)) 3602 wpa_hexdump_key(MSG_DEBUG, title, pos, dlen); 3603 return 0; 3604 } 3605 3606 if (left >= RSN_MLO_LINK_KDE_FIXED_LENGTH && 3607 selector == RSN_KEY_DATA_MLO_LINK) { 3608 link_id = (p[0] & RSN_MLO_LINK_KDE_LI_LINK_ID_MASK) >> 3609 RSN_MLO_LINK_KDE_LI_LINK_ID_SHIFT; 3610 if (link_id >= MAX_NUM_MLD_LINKS) 3611 return 2; 3612 3613 ie->valid_mlo_links |= BIT(link_id); 3614 ie->mlo_link[link_id] = p; 3615 ie->mlo_link_len[link_id] = left; 3616 ret = os_snprintf(title, sizeof(title), 3617 "RSN: Link ID %u - MLO Link KDE in EAPOL-Key", 3618 link_id); 3619 if (!os_snprintf_error(sizeof(title), ret)) 3620 wpa_hexdump(MSG_DEBUG, title, pos, dlen); 3621 return 0; 3622 } 3623 3624 return 2; 3625 } 3626 3627 3628 /** 3629 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs 3630 * @buf: Pointer to the Key Data buffer 3631 * @len: Key Data Length 3632 * @ie: Pointer to parsed IE data 3633 * Returns: 0 on success, -1 on failure 3634 */ 3635 int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie) 3636 { 3637 const u8 *pos, *end; 3638 int ret = 0; 3639 size_t dlen = 0; 3640 3641 os_memset(ie, 0, sizeof(*ie)); 3642 for (pos = buf, end = pos + len; end - pos > 1; pos += dlen) { 3643 if (pos[0] == 0xdd && 3644 ((pos == buf + len - 1) || pos[1] == 0)) { 3645 /* Ignore padding */ 3646 break; 3647 } 3648 dlen = 2 + pos[1]; 3649 if ((int) dlen > end - pos) { 3650 wpa_printf(MSG_DEBUG, 3651 "WPA: EAPOL-Key Key Data underflow (ie=%d len=%d pos=%d)", 3652 pos[0], pos[1], (int) (pos - buf)); 3653 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", buf, len); 3654 ret = -1; 3655 break; 3656 } 3657 if (*pos == WLAN_EID_RSN) { 3658 ie->rsn_ie = pos; 3659 ie->rsn_ie_len = dlen; 3660 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 3661 ie->rsn_ie, ie->rsn_ie_len); 3662 } else if (*pos == WLAN_EID_RSNX) { 3663 ie->rsnxe = pos; 3664 ie->rsnxe_len = dlen; 3665 wpa_hexdump(MSG_DEBUG, "WPA: RSNXE in EAPOL-Key", 3666 ie->rsnxe, ie->rsnxe_len); 3667 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) { 3668 ie->mdie = pos; 3669 ie->mdie_len = dlen; 3670 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 3671 ie->mdie, ie->mdie_len); 3672 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) { 3673 ie->ftie = pos; 3674 ie->ftie_len = dlen; 3675 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 3676 ie->ftie, ie->ftie_len); 3677 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 3678 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 3679 ie->reassoc_deadline = pos; 3680 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 3681 "in EAPOL-Key", 3682 ie->reassoc_deadline, dlen); 3683 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 3684 ie->key_lifetime = pos; 3685 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 3686 "in EAPOL-Key", 3687 ie->key_lifetime, dlen); 3688 } else { 3689 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 3690 "EAPOL-Key Key Data IE", 3691 pos, dlen); 3692 } 3693 } else if (*pos == WLAN_EID_LINK_ID) { 3694 if (pos[1] >= 18) { 3695 ie->lnkid = pos; 3696 ie->lnkid_len = dlen; 3697 } 3698 } else if (*pos == WLAN_EID_EXT_CAPAB) { 3699 ie->ext_capab = pos; 3700 ie->ext_capab_len = dlen; 3701 } else if (*pos == WLAN_EID_SUPP_RATES) { 3702 ie->supp_rates = pos; 3703 ie->supp_rates_len = dlen; 3704 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 3705 ie->ext_supp_rates = pos; 3706 ie->ext_supp_rates_len = dlen; 3707 } else if (*pos == WLAN_EID_HT_CAP && 3708 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { 3709 ie->ht_capabilities = pos + 2; 3710 } else if (*pos == WLAN_EID_AID) { 3711 if (pos[1] >= 2) 3712 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 3713 } else if (*pos == WLAN_EID_VHT_CAP && 3714 pos[1] >= sizeof(struct ieee80211_vht_capabilities)) 3715 { 3716 ie->vht_capabilities = pos + 2; 3717 } else if (*pos == WLAN_EID_EXTENSION && 3718 pos[1] >= 1 + IEEE80211_HE_CAPAB_MIN_LEN && 3719 pos[2] == WLAN_EID_EXT_HE_CAPABILITIES) { 3720 ie->he_capabilities = pos + 3; 3721 ie->he_capab_len = pos[1] - 1; 3722 } else if (*pos == WLAN_EID_EXTENSION && 3723 pos[1] >= 1 + 3724 sizeof(struct ieee80211_he_6ghz_band_cap) && 3725 pos[2] == WLAN_EID_EXT_HE_6GHZ_BAND_CAP) { 3726 ie->he_6ghz_capabilities = pos + 3; 3727 } else if (*pos == WLAN_EID_EXTENSION && 3728 pos[1] >= 1 + IEEE80211_EHT_CAPAB_MIN_LEN && 3729 pos[2] == WLAN_EID_EXT_EHT_CAPABILITIES) { 3730 ie->eht_capabilities = pos + 3; 3731 ie->eht_capab_len = pos[1] - 1; 3732 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { 3733 ie->qosinfo = pos[2]; 3734 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { 3735 ie->supp_channels = pos + 2; 3736 ie->supp_channels_len = pos[1]; 3737 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { 3738 /* 3739 * The value of the Length field of the Supported 3740 * Operating Classes element is between 2 and 253. 3741 * Silently skip invalid elements to avoid interop 3742 * issues when trying to use the value. 3743 */ 3744 if (pos[1] >= 2 && pos[1] <= 253) { 3745 ie->supp_oper_classes = pos + 2; 3746 ie->supp_oper_classes_len = pos[1]; 3747 } 3748 } else if (*pos == WLAN_EID_SSID) { 3749 ie->ssid = pos + 2; 3750 ie->ssid_len = pos[1]; 3751 wpa_hexdump_ascii(MSG_DEBUG, "RSN: SSID in EAPOL-Key", 3752 ie->ssid, ie->ssid_len); 3753 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 3754 ret = wpa_parse_generic(pos, ie); 3755 if (ret == 1) { 3756 /* end mark found */ 3757 ret = 0; 3758 break; 3759 } 3760 3761 if (ret == 2) { 3762 /* not a known KDE */ 3763 wpa_parse_vendor_specific(pos, end, ie); 3764 } 3765 3766 ret = 0; 3767 } else { 3768 wpa_hexdump(MSG_DEBUG, 3769 "WPA: Unrecognized EAPOL-Key Key Data IE", 3770 pos, dlen); 3771 } 3772 } 3773 3774 return ret; 3775 } 3776 3777 3778 #ifdef CONFIG_PASN 3779 3780 /* 3781 * wpa_pasn_build_auth_header - Add the MAC header and initialize Authentication 3782 * frame for PASN 3783 * 3784 * @buf: Buffer in which the header will be added 3785 * @bssid: The BSSID of the AP 3786 * @src: Source address 3787 * @dst: Destination address 3788 * @trans_seq: Authentication transaction sequence number 3789 * @status: Authentication status 3790 */ 3791 void wpa_pasn_build_auth_header(struct wpabuf *buf, const u8 *bssid, 3792 const u8 *src, const u8 *dst, 3793 u8 trans_seq, u16 status) 3794 { 3795 struct ieee80211_mgmt *auth; 3796 3797 wpa_printf(MSG_DEBUG, "PASN: Add authentication header. trans_seq=%u", 3798 trans_seq); 3799 3800 auth = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 3801 u.auth.variable)); 3802 3803 auth->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 3804 (WLAN_FC_STYPE_AUTH << 4)); 3805 3806 os_memcpy(auth->da, dst, ETH_ALEN); 3807 os_memcpy(auth->sa, src, ETH_ALEN); 3808 os_memcpy(auth->bssid, bssid, ETH_ALEN); 3809 auth->seq_ctrl = 0; 3810 3811 auth->u.auth.auth_alg = host_to_le16(WLAN_AUTH_PASN); 3812 auth->u.auth.auth_transaction = host_to_le16(trans_seq); 3813 auth->u.auth.status_code = host_to_le16(status); 3814 } 3815 3816 3817 /* 3818 * wpa_pasn_add_rsne - Add an RSNE for PASN authentication 3819 * @buf: Buffer in which the IE will be added 3820 * @pmkid: Optional PMKID. Can be NULL. 3821 * @akmp: Authentication and key management protocol 3822 * @cipher: The cipher suite 3823 */ 3824 int wpa_pasn_add_rsne(struct wpabuf *buf, const u8 *pmkid, int akmp, int cipher) 3825 { 3826 struct rsn_ie_hdr *hdr; 3827 u32 suite; 3828 u16 capab; 3829 u8 *pos; 3830 u8 rsne_len; 3831 3832 wpa_printf(MSG_DEBUG, "PASN: Add RSNE"); 3833 3834 rsne_len = sizeof(*hdr) + RSN_SELECTOR_LEN + 3835 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 3836 2 + RSN_SELECTOR_LEN + 2 + (pmkid ? PMKID_LEN : 0); 3837 3838 if (wpabuf_tailroom(buf) < rsne_len) 3839 return -1; 3840 hdr = wpabuf_put(buf, rsne_len); 3841 hdr->elem_id = WLAN_EID_RSN; 3842 hdr->len = rsne_len - 2; 3843 WPA_PUT_LE16(hdr->version, RSN_VERSION); 3844 pos = (u8 *) (hdr + 1); 3845 3846 /* Group addressed data is not allowed */ 3847 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); 3848 pos += RSN_SELECTOR_LEN; 3849 3850 /* Add the pairwise cipher */ 3851 WPA_PUT_LE16(pos, 1); 3852 pos += 2; 3853 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, cipher); 3854 RSN_SELECTOR_PUT(pos, suite); 3855 pos += RSN_SELECTOR_LEN; 3856 3857 /* Add the AKM suite */ 3858 WPA_PUT_LE16(pos, 1); 3859 pos += 2; 3860 3861 switch (akmp) { 3862 case WPA_KEY_MGMT_PASN: 3863 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PASN); 3864 break; 3865 #ifdef CONFIG_SAE 3866 case WPA_KEY_MGMT_SAE: 3867 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE); 3868 break; 3869 case WPA_KEY_MGMT_SAE_EXT_KEY: 3870 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE_EXT_KEY); 3871 break; 3872 #endif /* CONFIG_SAE */ 3873 #ifdef CONFIG_FILS 3874 case WPA_KEY_MGMT_FILS_SHA256: 3875 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256); 3876 break; 3877 case WPA_KEY_MGMT_FILS_SHA384: 3878 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384); 3879 break; 3880 #endif /* CONFIG_FILS */ 3881 #ifdef CONFIG_IEEE80211R 3882 case WPA_KEY_MGMT_FT_PSK: 3883 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK); 3884 break; 3885 case WPA_KEY_MGMT_FT_IEEE8021X: 3886 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X); 3887 break; 3888 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 3889 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384); 3890 break; 3891 #endif /* CONFIG_IEEE80211R */ 3892 default: 3893 wpa_printf(MSG_ERROR, "PASN: Invalid AKMP=0x%x", akmp); 3894 return -1; 3895 } 3896 pos += RSN_SELECTOR_LEN; 3897 3898 /* RSN Capabilities: PASN mandates both MFP capable and required */ 3899 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR; 3900 WPA_PUT_LE16(pos, capab); 3901 pos += 2; 3902 3903 if (pmkid) { 3904 wpa_printf(MSG_DEBUG, "PASN: Adding PMKID"); 3905 3906 WPA_PUT_LE16(pos, 1); 3907 pos += 2; 3908 os_memcpy(pos, pmkid, PMKID_LEN); 3909 pos += PMKID_LEN; 3910 } else { 3911 WPA_PUT_LE16(pos, 0); 3912 pos += 2; 3913 } 3914 3915 /* Group addressed management is not allowed */ 3916 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); 3917 3918 return 0; 3919 } 3920 3921 3922 /* 3923 * wpa_pasn_add_parameter_ie - Add PASN Parameters IE for PASN authentication 3924 * @buf: Buffer in which the IE will be added 3925 * @pasn_group: Finite Cyclic Group ID for PASN authentication 3926 * @wrapped_data_format: Format of the data in the Wrapped Data IE 3927 * @pubkey: A buffer holding the local public key. Can be NULL 3928 * @compressed: In case pubkey is included, indicates if the public key is 3929 * compressed (only x coordinate is included) or not (both x and y 3930 * coordinates are included) 3931 * @comeback: A buffer holding the comeback token. Can be NULL 3932 * @after: If comeback is set, defined the comeback time in seconds. -1 to not 3933 * include the Comeback After field (frames from non-AP STA). 3934 */ 3935 void wpa_pasn_add_parameter_ie(struct wpabuf *buf, u16 pasn_group, 3936 u8 wrapped_data_format, 3937 const struct wpabuf *pubkey, bool compressed, 3938 const struct wpabuf *comeback, int after) 3939 { 3940 struct pasn_parameter_ie *params; 3941 3942 wpa_printf(MSG_DEBUG, "PASN: Add PASN Parameters element"); 3943 3944 params = wpabuf_put(buf, sizeof(*params)); 3945 3946 params->id = WLAN_EID_EXTENSION; 3947 params->len = sizeof(*params) - 2; 3948 params->id_ext = WLAN_EID_EXT_PASN_PARAMS; 3949 params->control = 0; 3950 params->wrapped_data_format = wrapped_data_format; 3951 3952 if (comeback) { 3953 wpa_printf(MSG_DEBUG, "PASN: Adding comeback data"); 3954 3955 /* 3956 * 2 octets for the 'after' field + 1 octet for the length + 3957 * actual cookie data 3958 */ 3959 if (after >= 0) 3960 params->len += 2; 3961 params->len += 1 + wpabuf_len(comeback); 3962 params->control |= WPA_PASN_CTRL_COMEBACK_INFO_PRESENT; 3963 3964 if (after >= 0) 3965 wpabuf_put_le16(buf, after); 3966 wpabuf_put_u8(buf, wpabuf_len(comeback)); 3967 wpabuf_put_buf(buf, comeback); 3968 } 3969 3970 if (pubkey) { 3971 wpa_printf(MSG_DEBUG, 3972 "PASN: Adding public key and group ID %u", 3973 pasn_group); 3974 3975 /* 3976 * 2 octets for the finite cyclic group + 2 octets public key 3977 * length + 1 octet for the compressed/uncompressed indication + 3978 * the actual key. 3979 */ 3980 params->len += 2 + 1 + 1 + wpabuf_len(pubkey); 3981 params->control |= WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT; 3982 3983 wpabuf_put_le16(buf, pasn_group); 3984 3985 /* 3986 * The first octet indicates whether the public key is 3987 * compressed, as defined in RFC 5480 section 2.2. 3988 */ 3989 wpabuf_put_u8(buf, wpabuf_len(pubkey) + 1); 3990 wpabuf_put_u8(buf, compressed ? WPA_PASN_PUBKEY_COMPRESSED_0 : 3991 WPA_PASN_PUBKEY_UNCOMPRESSED); 3992 3993 wpabuf_put_buf(buf, pubkey); 3994 } 3995 } 3996 3997 /* 3998 * wpa_pasn_add_wrapped_data - Add a Wrapped Data IE to PASN Authentication 3999 * frame. If needed, the Wrapped Data IE would be fragmented. 4000 * 4001 * @buf: Buffer in which the IE will be added 4002 * @wrapped_data_buf: Buffer holding the wrapped data 4003 */ 4004 int wpa_pasn_add_wrapped_data(struct wpabuf *buf, 4005 struct wpabuf *wrapped_data_buf) 4006 { 4007 const u8 *data; 4008 size_t data_len; 4009 u8 len; 4010 4011 if (!wrapped_data_buf) 4012 return 0; 4013 4014 wpa_printf(MSG_DEBUG, "PASN: Add wrapped data"); 4015 4016 data = wpabuf_head_u8(wrapped_data_buf); 4017 data_len = wpabuf_len(wrapped_data_buf); 4018 4019 /* nothing to add */ 4020 if (!data_len) 4021 return 0; 4022 4023 if (data_len <= 254) 4024 len = 1 + data_len; 4025 else 4026 len = 255; 4027 4028 if (wpabuf_tailroom(buf) < 3 + data_len) 4029 return -1; 4030 4031 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); 4032 wpabuf_put_u8(buf, len); 4033 wpabuf_put_u8(buf, WLAN_EID_EXT_WRAPPED_DATA); 4034 wpabuf_put_data(buf, data, len - 1); 4035 4036 data += len - 1; 4037 data_len -= len - 1; 4038 4039 while (data_len) { 4040 if (wpabuf_tailroom(buf) < 1 + data_len) 4041 return -1; 4042 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT); 4043 len = data_len > 255 ? 255 : data_len; 4044 wpabuf_put_u8(buf, len); 4045 wpabuf_put_data(buf, data, len); 4046 data += len; 4047 data_len -= len; 4048 } 4049 4050 return 0; 4051 } 4052 4053 4054 /* 4055 * wpa_pasn_validate_rsne - Validate PSAN specific data of RSNE 4056 * @data: Parsed representation of an RSNE 4057 * Returns -1 for invalid data; otherwise 0 4058 */ 4059 int wpa_pasn_validate_rsne(const struct wpa_ie_data *data) 4060 { 4061 u16 capab = WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR; 4062 4063 if (data->proto != WPA_PROTO_RSN) 4064 return -1; 4065 4066 if ((data->capabilities & capab) != capab) { 4067 wpa_printf(MSG_DEBUG, "PASN: Invalid RSNE capabilities"); 4068 return -1; 4069 } 4070 4071 if (!data->has_group || data->group_cipher != WPA_CIPHER_GTK_NOT_USED) { 4072 wpa_printf(MSG_DEBUG, "PASN: Invalid group data cipher"); 4073 return -1; 4074 } 4075 4076 if (!data->has_pairwise || !data->pairwise_cipher || 4077 (data->pairwise_cipher & (data->pairwise_cipher - 1))) { 4078 wpa_printf(MSG_DEBUG, "PASN: No valid pairwise suite"); 4079 return -1; 4080 } 4081 4082 switch (data->key_mgmt) { 4083 #ifdef CONFIG_SAE 4084 case WPA_KEY_MGMT_SAE: 4085 case WPA_KEY_MGMT_SAE_EXT_KEY: 4086 /* fall through */ 4087 #endif /* CONFIG_SAE */ 4088 #ifdef CONFIG_FILS 4089 case WPA_KEY_MGMT_FILS_SHA256: 4090 case WPA_KEY_MGMT_FILS_SHA384: 4091 /* fall through */ 4092 #endif /* CONFIG_FILS */ 4093 #ifdef CONFIG_IEEE80211R 4094 case WPA_KEY_MGMT_FT_PSK: 4095 case WPA_KEY_MGMT_FT_IEEE8021X: 4096 case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: 4097 /* fall through */ 4098 #endif /* CONFIG_IEEE80211R */ 4099 case WPA_KEY_MGMT_PASN: 4100 break; 4101 default: 4102 wpa_printf(MSG_ERROR, "PASN: invalid key_mgmt: 0x%0x", 4103 data->key_mgmt); 4104 return -1; 4105 } 4106 4107 if (data->mgmt_group_cipher != WPA_CIPHER_GTK_NOT_USED) { 4108 wpa_printf(MSG_DEBUG, "PASN: Invalid group mgmt cipher"); 4109 return -1; 4110 } 4111 4112 if (data->num_pmkid > 1) { 4113 wpa_printf(MSG_DEBUG, "PASN: Invalid number of PMKIDs"); 4114 return -1; 4115 } 4116 4117 return 0; 4118 } 4119 4120 4121 /* 4122 * wpa_pasn_parse_parameter_ie - Validates PASN Parameters IE 4123 * @data: Pointer to the PASN Parameters IE (starting with the EID). 4124 * @len: Length of the data in the PASN Parameters IE 4125 * @from_ap: Whether this was received from an AP 4126 * @pasn_params: On successful return would hold the parsed PASN parameters. 4127 * Returns: -1 for invalid data; otherwise 0 4128 * 4129 * Note: On successful return, the pointers in &pasn_params point to the data in 4130 * the IE and are not locally allocated (so they should not be freed etc.). 4131 */ 4132 int wpa_pasn_parse_parameter_ie(const u8 *data, u8 len, bool from_ap, 4133 struct wpa_pasn_params_data *pasn_params) 4134 { 4135 struct pasn_parameter_ie *params = (struct pasn_parameter_ie *) data; 4136 const u8 *pos = (const u8 *) (params + 1); 4137 4138 if (!pasn_params) { 4139 wpa_printf(MSG_DEBUG, "PASN: Invalid params"); 4140 return -1; 4141 } 4142 4143 if (!params || ((size_t) (params->len + 2) < sizeof(*params)) || 4144 len < sizeof(*params) || params->len + 2 != len) { 4145 wpa_printf(MSG_DEBUG, 4146 "PASN: Invalid parameters IE. len=(%u, %u)", 4147 params ? params->len : 0, len); 4148 return -1; 4149 } 4150 4151 os_memset(pasn_params, 0, sizeof(*pasn_params)); 4152 4153 switch (params->wrapped_data_format) { 4154 case WPA_PASN_WRAPPED_DATA_NO: 4155 case WPA_PASN_WRAPPED_DATA_SAE: 4156 case WPA_PASN_WRAPPED_DATA_FILS_SK: 4157 case WPA_PASN_WRAPPED_DATA_FT: 4158 break; 4159 default: 4160 wpa_printf(MSG_DEBUG, "PASN: Invalid wrapped data format"); 4161 return -1; 4162 } 4163 4164 pasn_params->wrapped_data_format = params->wrapped_data_format; 4165 4166 len -= sizeof(*params); 4167 4168 if (params->control & WPA_PASN_CTRL_COMEBACK_INFO_PRESENT) { 4169 if (from_ap) { 4170 if (len < 2) { 4171 wpa_printf(MSG_DEBUG, 4172 "PASN: Invalid Parameters IE: Truncated Comeback After"); 4173 return -1; 4174 } 4175 pasn_params->after = WPA_GET_LE16(pos); 4176 pos += 2; 4177 len -= 2; 4178 } 4179 4180 if (len < 1 || len < 1 + *pos) { 4181 wpa_printf(MSG_DEBUG, 4182 "PASN: Invalid Parameters IE: comeback len"); 4183 return -1; 4184 } 4185 4186 pasn_params->comeback_len = *pos++; 4187 len--; 4188 pasn_params->comeback = pos; 4189 len -= pasn_params->comeback_len; 4190 pos += pasn_params->comeback_len; 4191 } 4192 4193 if (params->control & WPA_PASN_CTRL_GROUP_AND_KEY_PRESENT) { 4194 if (len < 3 || len < 3 + pos[2]) { 4195 wpa_printf(MSG_DEBUG, 4196 "PASN: Invalid Parameters IE: group and key"); 4197 return -1; 4198 } 4199 4200 pasn_params->group = WPA_GET_LE16(pos); 4201 pos += 2; 4202 len -= 2; 4203 pasn_params->pubkey_len = *pos++; 4204 len--; 4205 pasn_params->pubkey = pos; 4206 len -= pasn_params->pubkey_len; 4207 pos += pasn_params->pubkey_len; 4208 } 4209 4210 if (len) { 4211 wpa_printf(MSG_DEBUG, 4212 "PASN: Invalid Parameters IE. Bytes left=%u", len); 4213 return -1; 4214 } 4215 4216 return 0; 4217 } 4218 4219 4220 void wpa_pasn_add_rsnxe(struct wpabuf *buf, u16 capab) 4221 { 4222 size_t flen; 4223 4224 flen = (capab & 0xff00) ? 2 : 1; 4225 if (!capab) 4226 return; /* no supported extended RSN capabilities */ 4227 if (wpabuf_tailroom(buf) < 2 + flen) 4228 return; 4229 capab |= flen - 1; /* bit 0-3 = Field length (n - 1) */ 4230 4231 wpabuf_put_u8(buf, WLAN_EID_RSNX); 4232 wpabuf_put_u8(buf, flen); 4233 wpabuf_put_u8(buf, capab & 0x00ff); 4234 capab >>= 8; 4235 if (capab) 4236 wpabuf_put_u8(buf, capab); 4237 } 4238 4239 4240 /* 4241 * wpa_pasn_add_extra_ies - Add protocol specific IEs in Authentication 4242 * frame for PASN. 4243 * 4244 * @buf: Buffer in which the elements will be added 4245 * @extra_ies: Protocol specific elements to add 4246 * @len: Length of the elements 4247 * Returns: 0 on success, -1 on failure 4248 */ 4249 4250 int wpa_pasn_add_extra_ies(struct wpabuf *buf, const u8 *extra_ies, size_t len) 4251 { 4252 if (!len || !extra_ies || !buf) 4253 return 0; 4254 4255 if (wpabuf_tailroom(buf) < sizeof(len)) 4256 return -1; 4257 4258 wpabuf_put_data(buf, extra_ies, len); 4259 return 0; 4260 } 4261 4262 #endif /* CONFIG_PASN */ 4263
Indexes created Wed Jun 24 00:24:50 UTC 2026