1 /* 2 * WPA Supplicant - RSN PMKSA cache 3 * Copyright (c) 2004-2009, 2011-2015, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "eloop.h" 13 #include "eapol_supp/eapol_supp_sm.h" 14 #include "wpa.h" 15 #include "wpa_i.h" 16 #include "pmksa_cache.h" 17 18 #if defined(IEEE8021X_EAPOL) && !defined(CONFIG_NO_WPA) 19 20 static const int pmksa_cache_max_entries = 32; 21 22 struct rsn_pmksa_cache { 23 struct rsn_pmksa_cache_entry *pmksa; /* PMKSA cache */ 24 int pmksa_count; /* number of entries in PMKSA cache */ 25 struct wpa_sm *sm; /* TODO: get rid of this reference(?) */ 26 27 void (*free_cb)(struct rsn_pmksa_cache_entry *entry, void *ctx, 28 enum pmksa_free_reason reason); 29 void *ctx; 30 }; 31 32 33 static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa); 34 35 36 static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry) 37 { 38 bin_clear_free(entry, sizeof(*entry)); 39 } 40 41 42 static void pmksa_cache_free_entry(struct rsn_pmksa_cache *pmksa, 43 struct rsn_pmksa_cache_entry *entry, 44 enum pmksa_free_reason reason) 45 { 46 wpa_sm_remove_pmkid(pmksa->sm, entry->network_ctx, entry->aa, 47 entry->pmkid, 48 entry->fils_cache_id_set ? entry->fils_cache_id : 49 NULL); 50 pmksa->pmksa_count--; 51 pmksa->free_cb(entry, pmksa->ctx, reason); 52 _pmksa_cache_free_entry(entry); 53 } 54 55 56 static void pmksa_cache_expire(void *eloop_ctx, void *timeout_ctx) 57 { 58 struct rsn_pmksa_cache *pmksa = eloop_ctx; 59 struct os_reltime now; 60 61 os_get_reltime(&now); 62 while (pmksa->pmksa && pmksa->pmksa->expiration <= now.sec) { 63 struct rsn_pmksa_cache_entry *entry = pmksa->pmksa; 64 pmksa->pmksa = entry->next; 65 wpa_printf(MSG_DEBUG, "RSN: expired PMKSA cache entry for " 66 MACSTR, MAC2STR(entry->aa)); 67 pmksa_cache_free_entry(pmksa, entry, PMKSA_EXPIRE); 68 } 69 70 pmksa_cache_set_expiration(pmksa); 71 } 72 73 74 static void pmksa_cache_reauth(void *eloop_ctx, void *timeout_ctx) 75 { 76 struct rsn_pmksa_cache *pmksa = eloop_ctx; 77 pmksa->sm->cur_pmksa = NULL; 78 eapol_sm_request_reauth(pmksa->sm->eapol); 79 } 80 81 82 static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa) 83 { 84 int sec; 85 struct rsn_pmksa_cache_entry *entry; 86 struct os_reltime now; 87 88 eloop_cancel_timeout(pmksa_cache_expire, pmksa, NULL); 89 eloop_cancel_timeout(pmksa_cache_reauth, pmksa, NULL); 90 if (pmksa->pmksa == NULL) 91 return; 92 os_get_reltime(&now); 93 sec = pmksa->pmksa->expiration - now.sec; 94 if (sec < 0) 95 sec = 0; 96 eloop_register_timeout(sec + 1, 0, pmksa_cache_expire, pmksa, NULL); 97 98 entry = pmksa->sm->cur_pmksa ? pmksa->sm->cur_pmksa : 99 pmksa_cache_get(pmksa, pmksa->sm->bssid, NULL, NULL, 0); 100 if (entry) { 101 sec = pmksa->pmksa->reauth_time - now.sec; 102 if (sec < 0) 103 sec = 0; 104 eloop_register_timeout(sec, 0, pmksa_cache_reauth, pmksa, 105 NULL); 106 } 107 } 108 109 110 /** 111 * pmksa_cache_add - Add a PMKSA cache entry 112 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 113 * @pmk: The new pairwise master key 114 * @pmk_len: PMK length in bytes, usually PMK_LEN (32) 115 * @pmkid: Calculated PMKID 116 * @kck: Key confirmation key or %NULL if not yet derived 117 * @kck_len: KCK length in bytes 118 * @aa: Authenticator address 119 * @spa: Supplicant address 120 * @network_ctx: Network configuration context for this PMK 121 * @akmp: WPA_KEY_MGMT_* used in key derivation 122 * @cache_id: Pointer to FILS Cache Identifier or %NULL if not advertised 123 * Returns: Pointer to the added PMKSA cache entry or %NULL on error 124 * 125 * This function create a PMKSA entry for a new PMK and adds it to the PMKSA 126 * cache. If an old entry is already in the cache for the same Authenticator, 127 * this entry will be replaced with the new entry. PMKID will be calculated 128 * based on the PMK and the driver interface is notified of the new PMKID. 129 */ 130 struct rsn_pmksa_cache_entry * 131 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, 132 const u8 *pmkid, const u8 *kck, size_t kck_len, 133 const u8 *aa, const u8 *spa, void *network_ctx, int akmp, 134 const u8 *cache_id) 135 { 136 struct rsn_pmksa_cache_entry *entry; 137 struct os_reltime now; 138 139 if (pmk_len > PMK_LEN_MAX) 140 return NULL; 141 142 if (wpa_key_mgmt_suite_b(akmp) && !kck) 143 return NULL; 144 145 entry = os_zalloc(sizeof(*entry)); 146 if (entry == NULL) 147 return NULL; 148 os_memcpy(entry->pmk, pmk, pmk_len); 149 entry->pmk_len = pmk_len; 150 if (pmkid) 151 os_memcpy(entry->pmkid, pmkid, PMKID_LEN); 152 else if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) 153 rsn_pmkid_suite_b_192(kck, kck_len, aa, spa, entry->pmkid); 154 else if (wpa_key_mgmt_suite_b(akmp)) 155 rsn_pmkid_suite_b(kck, kck_len, aa, spa, entry->pmkid); 156 else 157 rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid, akmp); 158 os_get_reltime(&now); 159 entry->expiration = now.sec + pmksa->sm->dot11RSNAConfigPMKLifetime; 160 entry->reauth_time = now.sec + pmksa->sm->dot11RSNAConfigPMKLifetime * 161 pmksa->sm->dot11RSNAConfigPMKReauthThreshold / 100; 162 entry->akmp = akmp; 163 if (cache_id) { 164 entry->fils_cache_id_set = 1; 165 os_memcpy(entry->fils_cache_id, cache_id, FILS_CACHE_ID_LEN); 166 } 167 os_memcpy(entry->aa, aa, ETH_ALEN); 168 entry->network_ctx = network_ctx; 169 170 return pmksa_cache_add_entry(pmksa, entry); 171 } 172 173 174 struct rsn_pmksa_cache_entry * 175 pmksa_cache_add_entry(struct rsn_pmksa_cache *pmksa, 176 struct rsn_pmksa_cache_entry *entry) 177 { 178 struct rsn_pmksa_cache_entry *pos, *prev; 179 180 /* Replace an old entry for the same Authenticator (if found) with the 181 * new entry */ 182 pos = pmksa->pmksa; 183 prev = NULL; 184 while (pos) { 185 if (os_memcmp(entry->aa, pos->aa, ETH_ALEN) == 0) { 186 if (pos->pmk_len == entry->pmk_len && 187 os_memcmp_const(pos->pmk, entry->pmk, 188 entry->pmk_len) == 0 && 189 os_memcmp_const(pos->pmkid, entry->pmkid, 190 PMKID_LEN) == 0) { 191 wpa_printf(MSG_DEBUG, "WPA: reusing previous " 192 "PMKSA entry"); 193 os_free(entry); 194 return pos; 195 } 196 if (prev == NULL) 197 pmksa->pmksa = pos->next; 198 else 199 prev->next = pos->next; 200 201 /* 202 * If OKC is used, there may be other PMKSA cache 203 * entries based on the same PMK. These needs to be 204 * flushed so that a new entry can be created based on 205 * the new PMK. Only clear other entries if they have a 206 * matching PMK and this PMK has been used successfully 207 * with the current AP, i.e., if opportunistic flag has 208 * been cleared in wpa_supplicant_key_neg_complete(). 209 */ 210 wpa_printf(MSG_DEBUG, "RSN: Replace PMKSA entry for " 211 "the current AP and any PMKSA cache entry " 212 "that was based on the old PMK"); 213 if (!pos->opportunistic) 214 pmksa_cache_flush(pmksa, entry->network_ctx, 215 pos->pmk, pos->pmk_len); 216 pmksa_cache_free_entry(pmksa, pos, PMKSA_REPLACE); 217 break; 218 } 219 prev = pos; 220 pos = pos->next; 221 } 222 223 if (pmksa->pmksa_count >= pmksa_cache_max_entries && pmksa->pmksa) { 224 /* Remove the oldest entry to make room for the new entry */ 225 pos = pmksa->pmksa; 226 227 if (pos == pmksa->sm->cur_pmksa) { 228 /* 229 * Never remove the current PMKSA cache entry, since 230 * it's in use, and removing it triggers a needless 231 * deauthentication. 232 */ 233 pos = pos->next; 234 pmksa->pmksa->next = pos ? pos->next : NULL; 235 } else 236 pmksa->pmksa = pos->next; 237 238 if (pos) { 239 wpa_printf(MSG_DEBUG, "RSN: removed the oldest idle " 240 "PMKSA cache entry (for " MACSTR ") to " 241 "make room for new one", 242 MAC2STR(pos->aa)); 243 pmksa_cache_free_entry(pmksa, pos, PMKSA_FREE); 244 } 245 } 246 247 /* Add the new entry; order by expiration time */ 248 pos = pmksa->pmksa; 249 prev = NULL; 250 while (pos) { 251 if (pos->expiration > entry->expiration) 252 break; 253 prev = pos; 254 pos = pos->next; 255 } 256 if (prev == NULL) { 257 entry->next = pmksa->pmksa; 258 pmksa->pmksa = entry; 259 pmksa_cache_set_expiration(pmksa); 260 } else { 261 entry->next = prev->next; 262 prev->next = entry; 263 } 264 pmksa->pmksa_count++; 265 wpa_printf(MSG_DEBUG, "RSN: Added PMKSA cache entry for " MACSTR 266 " network_ctx=%p akmp=0x%x", MAC2STR(entry->aa), 267 entry->network_ctx, entry->akmp); 268 wpa_sm_add_pmkid(pmksa->sm, entry->network_ctx, entry->aa, entry->pmkid, 269 entry->fils_cache_id_set ? entry->fils_cache_id : NULL, 270 entry->pmk, entry->pmk_len); 271 272 return entry; 273 } 274 275 276 /** 277 * pmksa_cache_flush - Flush PMKSA cache entries for a specific network 278 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 279 * @network_ctx: Network configuration context or %NULL to flush all entries 280 * @pmk: PMK to match for or %NYLL to match all PMKs 281 * @pmk_len: PMK length 282 */ 283 void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx, 284 const u8 *pmk, size_t pmk_len) 285 { 286 struct rsn_pmksa_cache_entry *entry, *prev = NULL, *tmp; 287 int removed = 0; 288 289 entry = pmksa->pmksa; 290 while (entry) { 291 if ((entry->network_ctx == network_ctx || 292 network_ctx == NULL) && 293 (pmk == NULL || 294 (pmk_len == entry->pmk_len && 295 os_memcmp(pmk, entry->pmk, pmk_len) == 0))) { 296 wpa_printf(MSG_DEBUG, "RSN: Flush PMKSA cache entry " 297 "for " MACSTR, MAC2STR(entry->aa)); 298 if (prev) 299 prev->next = entry->next; 300 else 301 pmksa->pmksa = entry->next; 302 tmp = entry; 303 entry = entry->next; 304 pmksa_cache_free_entry(pmksa, tmp, PMKSA_FREE); 305 removed++; 306 } else { 307 prev = entry; 308 entry = entry->next; 309 } 310 } 311 if (removed) 312 pmksa_cache_set_expiration(pmksa); 313 } 314 315 316 /** 317 * pmksa_cache_deinit - Free all entries in PMKSA cache 318 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 319 */ 320 void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa) 321 { 322 struct rsn_pmksa_cache_entry *entry, *prev; 323 324 if (pmksa == NULL) 325 return; 326 327 entry = pmksa->pmksa; 328 pmksa->pmksa = NULL; 329 while (entry) { 330 prev = entry; 331 entry = entry->next; 332 os_free(prev); 333 } 334 pmksa_cache_set_expiration(pmksa); 335 os_free(pmksa); 336 } 337 338 339 /** 340 * pmksa_cache_get - Fetch a PMKSA cache entry 341 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 342 * @aa: Authenticator address or %NULL to match any 343 * @pmkid: PMKID or %NULL to match any 344 * @network_ctx: Network context or %NULL to match any 345 * @akmp: Specific AKMP to search for or 0 for any 346 * Returns: Pointer to PMKSA cache entry or %NULL if no match was found 347 */ 348 struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa, 349 const u8 *aa, const u8 *pmkid, 350 const void *network_ctx, 351 int akmp) 352 { 353 struct rsn_pmksa_cache_entry *entry = pmksa->pmksa; 354 while (entry) { 355 if ((aa == NULL || os_memcmp(entry->aa, aa, ETH_ALEN) == 0) && 356 (pmkid == NULL || 357 os_memcmp(entry->pmkid, pmkid, PMKID_LEN) == 0) && 358 (!akmp || akmp == entry->akmp) && 359 (network_ctx == NULL || network_ctx == entry->network_ctx)) 360 return entry; 361 entry = entry->next; 362 } 363 return NULL; 364 } 365 366 367 static struct rsn_pmksa_cache_entry * 368 pmksa_cache_clone_entry(struct rsn_pmksa_cache *pmksa, 369 const struct rsn_pmksa_cache_entry *old_entry, 370 const u8 *aa) 371 { 372 struct rsn_pmksa_cache_entry *new_entry; 373 os_time_t old_expiration = old_entry->expiration; 374 375 new_entry = pmksa_cache_add(pmksa, old_entry->pmk, old_entry->pmk_len, 376 NULL, NULL, 0, 377 aa, pmksa->sm->own_addr, 378 old_entry->network_ctx, old_entry->akmp, 379 old_entry->fils_cache_id_set ? 380 old_entry->fils_cache_id : NULL); 381 if (new_entry == NULL) 382 return NULL; 383 384 /* TODO: reorder entries based on expiration time? */ 385 new_entry->expiration = old_expiration; 386 new_entry->opportunistic = 1; 387 388 return new_entry; 389 } 390 391 392 /** 393 * pmksa_cache_get_opportunistic - Try to get an opportunistic PMKSA entry 394 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 395 * @network_ctx: Network configuration context 396 * @aa: Authenticator address for the new AP 397 * @akmp: Specific AKMP to search for or 0 for any 398 * Returns: Pointer to a new PMKSA cache entry or %NULL if not available 399 * 400 * Try to create a new PMKSA cache entry opportunistically by guessing that the 401 * new AP is sharing the same PMK as another AP that has the same SSID and has 402 * already an entry in PMKSA cache. 403 */ 404 struct rsn_pmksa_cache_entry * 405 pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa, void *network_ctx, 406 const u8 *aa, int akmp) 407 { 408 struct rsn_pmksa_cache_entry *entry = pmksa->pmksa; 409 410 wpa_printf(MSG_DEBUG, "RSN: Consider " MACSTR " for OKC", MAC2STR(aa)); 411 if (network_ctx == NULL) 412 return NULL; 413 while (entry) { 414 if (entry->network_ctx == network_ctx && 415 (!akmp || entry->akmp == akmp)) { 416 entry = pmksa_cache_clone_entry(pmksa, entry, aa); 417 if (entry) { 418 wpa_printf(MSG_DEBUG, "RSN: added " 419 "opportunistic PMKSA cache entry " 420 "for " MACSTR, MAC2STR(aa)); 421 } 422 return entry; 423 } 424 entry = entry->next; 425 } 426 return NULL; 427 } 428 429 430 static struct rsn_pmksa_cache_entry * 431 pmksa_cache_get_fils_cache_id(struct rsn_pmksa_cache *pmksa, 432 const void *network_ctx, const u8 *cache_id) 433 { 434 struct rsn_pmksa_cache_entry *entry; 435 436 for (entry = pmksa->pmksa; entry; entry = entry->next) { 437 if (network_ctx == entry->network_ctx && 438 entry->fils_cache_id_set && 439 os_memcmp(cache_id, entry->fils_cache_id, 440 FILS_CACHE_ID_LEN) == 0) 441 return entry; 442 } 443 444 return NULL; 445 } 446 447 448 /** 449 * pmksa_cache_get_current - Get the current used PMKSA entry 450 * @sm: Pointer to WPA state machine data from wpa_sm_init() 451 * Returns: Pointer to the current PMKSA cache entry or %NULL if not available 452 */ 453 struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm) 454 { 455 if (sm == NULL) 456 return NULL; 457 return sm->cur_pmksa; 458 } 459 460 461 /** 462 * pmksa_cache_clear_current - Clear the current PMKSA entry selection 463 * @sm: Pointer to WPA state machine data from wpa_sm_init() 464 */ 465 void pmksa_cache_clear_current(struct wpa_sm *sm) 466 { 467 if (sm == NULL) 468 return; 469 sm->cur_pmksa = NULL; 470 } 471 472 473 /** 474 * pmksa_cache_set_current - Set the current PMKSA entry selection 475 * @sm: Pointer to WPA state machine data from wpa_sm_init() 476 * @pmkid: PMKID for selecting PMKSA or %NULL if not used 477 * @bssid: BSSID for PMKSA or %NULL if not used 478 * @network_ctx: Network configuration context 479 * @try_opportunistic: Whether to allow opportunistic PMKSA caching 480 * @fils_cache_id: Pointer to FILS Cache Identifier or %NULL if not used 481 * Returns: 0 if PMKSA was found or -1 if no matching entry was found 482 */ 483 int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid, 484 const u8 *bssid, void *network_ctx, 485 int try_opportunistic, const u8 *fils_cache_id, 486 int akmp) 487 { 488 struct rsn_pmksa_cache *pmksa = sm->pmksa; 489 wpa_printf(MSG_DEBUG, "RSN: PMKSA cache search - network_ctx=%p " 490 "try_opportunistic=%d akmp=0x%x", 491 network_ctx, try_opportunistic, akmp); 492 if (pmkid) 493 wpa_hexdump(MSG_DEBUG, "RSN: Search for PMKID", 494 pmkid, PMKID_LEN); 495 if (bssid) 496 wpa_printf(MSG_DEBUG, "RSN: Search for BSSID " MACSTR, 497 MAC2STR(bssid)); 498 if (fils_cache_id) 499 wpa_printf(MSG_DEBUG, 500 "RSN: Search for FILS Cache Identifier %02x%02x", 501 fils_cache_id[0], fils_cache_id[1]); 502 503 sm->cur_pmksa = NULL; 504 if (pmkid) 505 sm->cur_pmksa = pmksa_cache_get(pmksa, NULL, pmkid, 506 network_ctx, akmp); 507 if (sm->cur_pmksa == NULL && bssid) 508 sm->cur_pmksa = pmksa_cache_get(pmksa, bssid, NULL, 509 network_ctx, akmp); 510 if (sm->cur_pmksa == NULL && try_opportunistic && bssid) 511 sm->cur_pmksa = pmksa_cache_get_opportunistic(pmksa, 512 network_ctx, 513 bssid, akmp); 514 if (sm->cur_pmksa == NULL && fils_cache_id) 515 sm->cur_pmksa = pmksa_cache_get_fils_cache_id(pmksa, 516 network_ctx, 517 fils_cache_id); 518 if (sm->cur_pmksa) { 519 wpa_hexdump(MSG_DEBUG, "RSN: PMKSA cache entry found - PMKID", 520 sm->cur_pmksa->pmkid, PMKID_LEN); 521 return 0; 522 } 523 wpa_printf(MSG_DEBUG, "RSN: No PMKSA cache entry found"); 524 return -1; 525 } 526 527 528 /** 529 * pmksa_cache_list - Dump text list of entries in PMKSA cache 530 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 531 * @buf: Buffer for the list 532 * @len: Length of the buffer 533 * Returns: number of bytes written to buffer 534 * 535 * This function is used to generate a text format representation of the 536 * current PMKSA cache contents for the ctrl_iface PMKSA command. 537 */ 538 int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len) 539 { 540 int i, ret; 541 char *pos = buf; 542 struct rsn_pmksa_cache_entry *entry; 543 struct os_reltime now; 544 int cache_id_used = 0; 545 546 for (entry = pmksa->pmksa; entry; entry = entry->next) { 547 if (entry->fils_cache_id_set) { 548 cache_id_used = 1; 549 break; 550 } 551 } 552 553 os_get_reltime(&now); 554 ret = os_snprintf(pos, buf + len - pos, 555 "Index / AA / PMKID / expiration (in seconds) / " 556 "opportunistic%s\n", 557 cache_id_used ? " / FILS Cache Identifier" : ""); 558 if (os_snprintf_error(buf + len - pos, ret)) 559 return pos - buf; 560 pos += ret; 561 i = 0; 562 entry = pmksa->pmksa; 563 while (entry) { 564 i++; 565 ret = os_snprintf(pos, buf + len - pos, "%d " MACSTR " ", 566 i, MAC2STR(entry->aa)); 567 if (os_snprintf_error(buf + len - pos, ret)) 568 return pos - buf; 569 pos += ret; 570 pos += wpa_snprintf_hex(pos, buf + len - pos, entry->pmkid, 571 PMKID_LEN); 572 ret = os_snprintf(pos, buf + len - pos, " %d %d", 573 (int) (entry->expiration - now.sec), 574 entry->opportunistic); 575 if (os_snprintf_error(buf + len - pos, ret)) 576 return pos - buf; 577 pos += ret; 578 if (entry->fils_cache_id_set) { 579 ret = os_snprintf(pos, buf + len - pos, " %02x%02x", 580 entry->fils_cache_id[0], 581 entry->fils_cache_id[1]); 582 if (os_snprintf_error(buf + len - pos, ret)) 583 return pos - buf; 584 pos += ret; 585 } 586 ret = os_snprintf(pos, buf + len - pos, "\n"); 587 if (os_snprintf_error(buf + len - pos, ret)) 588 return pos - buf; 589 pos += ret; 590 entry = entry->next; 591 } 592 return pos - buf; 593 } 594 595 596 struct rsn_pmksa_cache_entry * pmksa_cache_head(struct rsn_pmksa_cache *pmksa) 597 { 598 return pmksa->pmksa; 599 } 600 601 602 /** 603 * pmksa_cache_init - Initialize PMKSA cache 604 * @free_cb: Callback function to be called when a PMKSA cache entry is freed 605 * @ctx: Context pointer for free_cb function 606 * @sm: Pointer to WPA state machine data from wpa_sm_init() 607 * Returns: Pointer to PMKSA cache data or %NULL on failure 608 */ 609 struct rsn_pmksa_cache * 610 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry, 611 void *ctx, enum pmksa_free_reason reason), 612 void *ctx, struct wpa_sm *sm) 613 { 614 struct rsn_pmksa_cache *pmksa; 615 616 pmksa = os_zalloc(sizeof(*pmksa)); 617 if (pmksa) { 618 pmksa->free_cb = free_cb; 619 pmksa->ctx = ctx; 620 pmksa->sm = sm; 621 } 622 623 return pmksa; 624 } 625 626 #endif /* IEEE8021X_EAPOL */ 627