wpa_auth_ft.c revision 214734
1/* 2 * hostapd - IEEE 802.11r - Fast BSS Transition 3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "utils/includes.h" 16 17#include "utils/common.h" 18#include "common/ieee802_11_defs.h" 19#include "common/ieee802_11_common.h" 20#include "crypto/aes_wrap.h" 21#include "ap_config.h" 22#include "ieee802_11.h" 23#include "wmm.h" 24#include "wpa_auth.h" 25#include "wpa_auth_i.h" 26#include "wpa_auth_ie.h" 27 28 29#ifdef CONFIG_IEEE80211R 30 31struct wpa_ft_ies { 32 const u8 *mdie; 33 size_t mdie_len; 34 const u8 *ftie; 35 size_t ftie_len; 36 const u8 *r1kh_id; 37 const u8 *gtk; 38 size_t gtk_len; 39 const u8 *r0kh_id; 40 size_t r0kh_id_len; 41 const u8 *rsn; 42 size_t rsn_len; 43 const u8 *rsn_pmkid; 44 const u8 *ric; 45 size_t ric_len; 46}; 47 48 49static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, 50 struct wpa_ft_ies *parse); 51 52 53static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst, 54 const u8 *data, size_t data_len) 55{ 56 if (wpa_auth->cb.send_ether == NULL) 57 return -1; 58 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst)); 59 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB, 60 data, data_len); 61} 62 63 64static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth, 65 const u8 *dst, const u8 *data, size_t data_len) 66{ 67 if (wpa_auth->cb.send_ft_action == NULL) 68 return -1; 69 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst, 70 data, data_len); 71} 72 73 74static struct wpa_state_machine * 75wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr) 76{ 77 if (wpa_auth->cb.add_sta == NULL) 78 return NULL; 79 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr); 80} 81 82 83int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len) 84{ 85 u8 *pos = buf; 86 u8 capab; 87 if (len < 2 + sizeof(struct rsn_mdie)) 88 return -1; 89 90 *pos++ = WLAN_EID_MOBILITY_DOMAIN; 91 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1; 92 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN); 93 pos += MOBILITY_DOMAIN_ID_LEN; 94 capab = RSN_FT_CAPAB_FT_OVER_DS; 95 *pos++ = capab; 96 97 return pos - buf; 98} 99 100 101int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id, 102 size_t r0kh_id_len, 103 const u8 *anonce, const u8 *snonce, 104 u8 *buf, size_t len, const u8 *subelem, 105 size_t subelem_len) 106{ 107 u8 *pos = buf, *ielen; 108 struct rsn_ftie *hdr; 109 110 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len + 111 subelem_len) 112 return -1; 113 114 *pos++ = WLAN_EID_FAST_BSS_TRANSITION; 115 ielen = pos++; 116 117 hdr = (struct rsn_ftie *) pos; 118 os_memset(hdr, 0, sizeof(*hdr)); 119 pos += sizeof(*hdr); 120 WPA_PUT_LE16(hdr->mic_control, 0); 121 if (anonce) 122 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN); 123 if (snonce) 124 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN); 125 126 /* Optional Parameters */ 127 *pos++ = FTIE_SUBELEM_R1KH_ID; 128 *pos++ = FT_R1KH_ID_LEN; 129 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN); 130 pos += FT_R1KH_ID_LEN; 131 132 if (r0kh_id) { 133 *pos++ = FTIE_SUBELEM_R0KH_ID; 134 *pos++ = r0kh_id_len; 135 os_memcpy(pos, r0kh_id, r0kh_id_len); 136 pos += r0kh_id_len; 137 } 138 139 if (subelem) { 140 os_memcpy(pos, subelem, subelem_len); 141 pos += subelem_len; 142 } 143 144 *ielen = pos - buf - 2; 145 146 return pos - buf; 147} 148 149 150struct wpa_ft_pmk_r0_sa { 151 struct wpa_ft_pmk_r0_sa *next; 152 u8 pmk_r0[PMK_LEN]; 153 u8 pmk_r0_name[WPA_PMK_NAME_LEN]; 154 u8 spa[ETH_ALEN]; 155 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ 156 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */ 157 int pmk_r1_pushed; 158}; 159 160struct wpa_ft_pmk_r1_sa { 161 struct wpa_ft_pmk_r1_sa *next; 162 u8 pmk_r1[PMK_LEN]; 163 u8 pmk_r1_name[WPA_PMK_NAME_LEN]; 164 u8 spa[ETH_ALEN]; 165 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */ 166 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */ 167}; 168 169struct wpa_ft_pmk_cache { 170 struct wpa_ft_pmk_r0_sa *pmk_r0; 171 struct wpa_ft_pmk_r1_sa *pmk_r1; 172}; 173 174struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void) 175{ 176 struct wpa_ft_pmk_cache *cache; 177 178 cache = os_zalloc(sizeof(*cache)); 179 180 return cache; 181} 182 183 184void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache) 185{ 186 struct wpa_ft_pmk_r0_sa *r0, *r0prev; 187 struct wpa_ft_pmk_r1_sa *r1, *r1prev; 188 189 r0 = cache->pmk_r0; 190 while (r0) { 191 r0prev = r0; 192 r0 = r0->next; 193 os_memset(r0prev->pmk_r0, 0, PMK_LEN); 194 os_free(r0prev); 195 } 196 197 r1 = cache->pmk_r1; 198 while (r1) { 199 r1prev = r1; 200 r1 = r1->next; 201 os_memset(r1prev->pmk_r1, 0, PMK_LEN); 202 os_free(r1prev); 203 } 204 205 os_free(cache); 206} 207 208 209static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth, 210 const u8 *spa, const u8 *pmk_r0, 211 const u8 *pmk_r0_name, int pairwise) 212{ 213 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; 214 struct wpa_ft_pmk_r0_sa *r0; 215 216 /* TODO: add expiration and limit on number of entries in cache */ 217 218 r0 = os_zalloc(sizeof(*r0)); 219 if (r0 == NULL) 220 return -1; 221 222 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN); 223 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN); 224 os_memcpy(r0->spa, spa, ETH_ALEN); 225 r0->pairwise = pairwise; 226 227 r0->next = cache->pmk_r0; 228 cache->pmk_r0 = r0; 229 230 return 0; 231} 232 233 234static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth, 235 const u8 *spa, const u8 *pmk_r0_name, 236 u8 *pmk_r0, int *pairwise) 237{ 238 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; 239 struct wpa_ft_pmk_r0_sa *r0; 240 241 r0 = cache->pmk_r0; 242 while (r0) { 243 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 && 244 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN) 245 == 0) { 246 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN); 247 if (pairwise) 248 *pairwise = r0->pairwise; 249 return 0; 250 } 251 252 r0 = r0->next; 253 } 254 255 return -1; 256} 257 258 259static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth, 260 const u8 *spa, const u8 *pmk_r1, 261 const u8 *pmk_r1_name, int pairwise) 262{ 263 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; 264 struct wpa_ft_pmk_r1_sa *r1; 265 266 /* TODO: add expiration and limit on number of entries in cache */ 267 268 r1 = os_zalloc(sizeof(*r1)); 269 if (r1 == NULL) 270 return -1; 271 272 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN); 273 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN); 274 os_memcpy(r1->spa, spa, ETH_ALEN); 275 r1->pairwise = pairwise; 276 277 r1->next = cache->pmk_r1; 278 cache->pmk_r1 = r1; 279 280 return 0; 281} 282 283 284static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth, 285 const u8 *spa, const u8 *pmk_r1_name, 286 u8 *pmk_r1, int *pairwise) 287{ 288 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache; 289 struct wpa_ft_pmk_r1_sa *r1; 290 291 r1 = cache->pmk_r1; 292 while (r1) { 293 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 && 294 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN) 295 == 0) { 296 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN); 297 if (pairwise) 298 *pairwise = r1->pairwise; 299 return 0; 300 } 301 302 r1 = r1->next; 303 } 304 305 return -1; 306} 307 308 309static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth, 310 const u8 *s1kh_id, const u8 *r0kh_id, 311 size_t r0kh_id_len, const u8 *pmk_r0_name) 312{ 313 struct ft_remote_r0kh *r0kh; 314 struct ft_r0kh_r1kh_pull_frame frame, f; 315 316 r0kh = wpa_auth->conf.r0kh_list; 317 while (r0kh) { 318 if (r0kh->id_len == r0kh_id_len && 319 os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0) 320 break; 321 r0kh = r0kh->next; 322 } 323 if (r0kh == NULL) 324 return -1; 325 326 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH " 327 "address " MACSTR, MAC2STR(r0kh->addr)); 328 329 os_memset(&frame, 0, sizeof(frame)); 330 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; 331 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL; 332 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN); 333 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN); 334 335 /* aes_wrap() does not support inplace encryption, so use a temporary 336 * buffer for the data. */ 337 if (os_get_random(f.nonce, sizeof(f.nonce))) { 338 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for " 339 "nonce"); 340 return -1; 341 } 342 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN); 343 os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN); 344 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN); 345 346 if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8, 347 f.nonce, frame.nonce) < 0) 348 return -1; 349 350 wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame)); 351 352 return 0; 353} 354 355 356int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk, 357 struct wpa_ptk *ptk, size_t ptk_len) 358{ 359 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN]; 360 u8 pmk_r1[PMK_LEN]; 361 u8 ptk_name[WPA_PMK_NAME_LEN]; 362 const u8 *mdid = sm->wpa_auth->conf.mobility_domain; 363 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder; 364 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len; 365 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder; 366 const u8 *ssid = sm->wpa_auth->conf.ssid; 367 size_t ssid_len = sm->wpa_auth->conf.ssid_len; 368 369 370 if (sm->xxkey_len == 0) { 371 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key " 372 "derivation"); 373 return -1; 374 } 375 376 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid, 377 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name); 378 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN); 379 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN); 380 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name, 381 sm->pairwise); 382 383 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr, 384 pmk_r1, sm->pmk_r1_name); 385 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN); 386 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name, 387 WPA_PMK_NAME_LEN); 388 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name, 389 sm->pairwise); 390 391 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr, 392 sm->wpa_auth->addr, sm->pmk_r1_name, 393 (u8 *) ptk, ptk_len, ptk_name); 394 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len); 395 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN); 396 397 return 0; 398} 399 400 401static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, 402 const u8 *addr, int idx, u8 *seq) 403{ 404 if (wpa_auth->cb.get_seqnum == NULL) 405 return -1; 406 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq); 407} 408 409 410static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len) 411{ 412 u8 *subelem; 413 struct wpa_group *gsm = sm->group; 414 size_t subelem_len, pad_len; 415 const u8 *key; 416 size_t key_len; 417 u8 keybuf[32]; 418 419 key_len = gsm->GTK_len; 420 if (key_len > sizeof(keybuf)) 421 return NULL; 422 423 /* 424 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less 425 * than 16 bytes. 426 */ 427 pad_len = key_len % 8; 428 if (pad_len) 429 pad_len = 8 - pad_len; 430 if (key_len + pad_len < 16) 431 pad_len += 8; 432 if (pad_len) { 433 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len); 434 os_memset(keybuf + key_len, 0, pad_len); 435 keybuf[key_len] = 0xdd; 436 key_len += pad_len; 437 key = keybuf; 438 } else 439 key = gsm->GTK[gsm->GN - 1]; 440 441 /* 442 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | 443 * Key[5..32]. 444 */ 445 subelem_len = 13 + key_len + 8; 446 subelem = os_zalloc(subelem_len); 447 if (subelem == NULL) 448 return NULL; 449 450 subelem[0] = FTIE_SUBELEM_GTK; 451 subelem[1] = 11 + key_len + 8; 452 /* Key ID in B0-B1 of Key Info */ 453 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03); 454 subelem[4] = gsm->GTK_len; 455 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5); 456 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) { 457 os_free(subelem); 458 return NULL; 459 } 460 461 *len = subelem_len; 462 return subelem; 463} 464 465 466#ifdef CONFIG_IEEE80211W 467static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len) 468{ 469 u8 *subelem, *pos; 470 struct wpa_group *gsm = sm->group; 471 size_t subelem_len; 472 473 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] | 474 * Key[16+8] */ 475 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8; 476 subelem = os_zalloc(subelem_len); 477 if (subelem == NULL) 478 return NULL; 479 480 pos = subelem; 481 *pos++ = FTIE_SUBELEM_IGTK; 482 *pos++ = subelem_len - 2; 483 WPA_PUT_LE16(pos, gsm->GN_igtk); 484 pos += 2; 485 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos); 486 pos += 6; 487 *pos++ = WPA_IGTK_LEN; 488 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8, 489 gsm->IGTK[gsm->GN_igtk - 4], pos)) { 490 os_free(subelem); 491 return NULL; 492 } 493 494 *len = subelem_len; 495 return subelem; 496} 497#endif /* CONFIG_IEEE80211W */ 498 499 500static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count, 501 const u8 *ies, size_t ies_len) 502{ 503 struct ieee802_11_elems parse; 504 struct rsn_rdie *rdie; 505 506 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d", 507 id, descr_count); 508 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)", 509 ies, ies_len); 510 511 if (end - pos < (int) sizeof(*rdie)) { 512 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE"); 513 return pos; 514 } 515 516 *pos++ = WLAN_EID_RIC_DATA; 517 *pos++ = sizeof(*rdie); 518 rdie = (struct rsn_rdie *) pos; 519 rdie->id = id; 520 rdie->descr_count = 0; 521 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS); 522 pos += sizeof(*rdie); 523 524 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) == 525 ParseFailed) { 526 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs"); 527 rdie->status_code = 528 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); 529 return pos; 530 } 531 532#ifdef NEED_AP_MLME 533 if (parse.wmm_tspec) { 534 struct wmm_tspec_element *tspec; 535 int res; 536 537 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) { 538 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE " 539 "(%d)", (int) parse.wmm_tspec_len); 540 rdie->status_code = 541 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); 542 return pos; 543 } 544 if (end - pos < (int) sizeof(*tspec)) { 545 wpa_printf(MSG_ERROR, "FT: Not enough room for " 546 "response TSPEC"); 547 rdie->status_code = 548 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); 549 return pos; 550 } 551 tspec = (struct wmm_tspec_element *) pos; 552 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec)); 553 res = wmm_process_tspec(tspec); 554 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res); 555 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS) 556 rdie->status_code = 557 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS); 558 else if (res == WMM_ADDTS_STATUS_REFUSED) 559 rdie->status_code = 560 host_to_le16(WLAN_STATUS_REQUEST_DECLINED); 561 else { 562 /* TSPEC accepted; include updated TSPEC in response */ 563 rdie->descr_count = 1; 564 pos += sizeof(*tspec); 565 } 566 return pos; 567 } 568#endif /* NEED_AP_MLME */ 569 570 wpa_printf(MSG_DEBUG, "FT: No supported resource requested"); 571 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE); 572 return pos; 573} 574 575 576static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len) 577{ 578 const u8 *rpos, *start; 579 const struct rsn_rdie *rdie; 580 581 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len); 582 583 rpos = ric; 584 while (rpos + sizeof(*rdie) < ric + ric_len) { 585 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) || 586 rpos + 2 + rpos[1] > ric + ric_len) 587 break; 588 rdie = (const struct rsn_rdie *) (rpos + 2); 589 rpos += 2 + rpos[1]; 590 start = rpos; 591 592 while (rpos + 2 <= ric + ric_len && 593 rpos + 2 + rpos[1] <= ric + ric_len) { 594 if (rpos[0] == WLAN_EID_RIC_DATA) 595 break; 596 rpos += 2 + rpos[1]; 597 } 598 pos = wpa_ft_process_rdie(pos, end, rdie->id, 599 rdie->descr_count, 600 start, rpos - start); 601 } 602 603 return pos; 604} 605 606 607u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos, 608 size_t max_len, int auth_alg, 609 const u8 *req_ies, size_t req_ies_len) 610{ 611 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL; 612 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0; 613 int res; 614 struct wpa_auth_config *conf; 615 struct rsn_ftie *_ftie; 616 struct wpa_ft_ies parse; 617 u8 *ric_start; 618 u8 *anonce, *snonce; 619 620 if (sm == NULL) 621 return pos; 622 623 conf = &sm->wpa_auth->conf; 624 625 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X && 626 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK) 627 return pos; 628 629 end = pos + max_len; 630 631 if (auth_alg == WLAN_AUTH_FT) { 632 /* 633 * RSN (only present if this is a Reassociation Response and 634 * part of a fast BSS transition) 635 */ 636 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name); 637 if (res < 0) 638 return pos; 639 rsnie = pos; 640 rsnie_len = res; 641 pos += res; 642 } 643 644 /* Mobility Domain Information */ 645 res = wpa_write_mdie(conf, pos, end - pos); 646 if (res < 0) 647 return pos; 648 mdie = pos; 649 mdie_len = res; 650 pos += res; 651 652 /* Fast BSS Transition Information */ 653 if (auth_alg == WLAN_AUTH_FT) { 654 subelem = wpa_ft_gtk_subelem(sm, &subelem_len); 655 r0kh_id = sm->r0kh_id; 656 r0kh_id_len = sm->r0kh_id_len; 657 anonce = sm->ANonce; 658 snonce = sm->SNonce; 659#ifdef CONFIG_IEEE80211W 660 if (sm->mgmt_frame_prot) { 661 u8 *igtk; 662 size_t igtk_len; 663 u8 *nbuf; 664 igtk = wpa_ft_igtk_subelem(sm, &igtk_len); 665 if (igtk == NULL) { 666 os_free(subelem); 667 return pos; 668 } 669 nbuf = os_realloc(subelem, subelem_len + igtk_len); 670 if (nbuf == NULL) { 671 os_free(subelem); 672 os_free(igtk); 673 return pos; 674 } 675 subelem = nbuf; 676 os_memcpy(subelem + subelem_len, igtk, igtk_len); 677 subelem_len += igtk_len; 678 os_free(igtk); 679 } 680#endif /* CONFIG_IEEE80211W */ 681 } else { 682 r0kh_id = conf->r0_key_holder; 683 r0kh_id_len = conf->r0_key_holder_len; 684 anonce = NULL; 685 snonce = NULL; 686 } 687 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos, 688 end - pos, subelem, subelem_len); 689 os_free(subelem); 690 if (res < 0) 691 return pos; 692 ftie = pos; 693 ftie_len = res; 694 pos += res; 695 696 os_free(sm->assoc_resp_ftie); 697 sm->assoc_resp_ftie = os_malloc(ftie_len); 698 if (sm->assoc_resp_ftie) 699 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len); 700 701 _ftie = (struct rsn_ftie *) (ftie + 2); 702 if (auth_alg == WLAN_AUTH_FT) 703 _ftie->mic_control[1] = 3; /* Information element count */ 704 705 ric_start = pos; 706 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) { 707 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len); 708 if (auth_alg == WLAN_AUTH_FT) 709 _ftie->mic_control[1] += 710 ieee802_11_ie_count(ric_start, 711 pos - ric_start); 712 } 713 if (ric_start == pos) 714 ric_start = NULL; 715 716 if (auth_alg == WLAN_AUTH_FT && 717 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6, 718 mdie, mdie_len, ftie, ftie_len, 719 rsnie, rsnie_len, 720 ric_start, ric_start ? pos - ric_start : 0, 721 _ftie->mic) < 0) 722 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC"); 723 724 return pos; 725} 726 727 728static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len, 729 struct wpa_ft_ies *parse) 730{ 731 const u8 *end, *pos; 732 733 parse->ftie = ie; 734 parse->ftie_len = ie_len; 735 736 pos = ie + sizeof(struct rsn_ftie); 737 end = ie + ie_len; 738 739 while (pos + 2 <= end && pos + 2 + pos[1] <= end) { 740 switch (pos[0]) { 741 case FTIE_SUBELEM_R1KH_ID: 742 if (pos[1] != FT_R1KH_ID_LEN) { 743 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID " 744 "length in FTIE: %d", pos[1]); 745 return -1; 746 } 747 parse->r1kh_id = pos + 2; 748 break; 749 case FTIE_SUBELEM_GTK: 750 parse->gtk = pos + 2; 751 parse->gtk_len = pos[1]; 752 break; 753 case FTIE_SUBELEM_R0KH_ID: 754 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) { 755 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID " 756 "length in FTIE: %d", pos[1]); 757 return -1; 758 } 759 parse->r0kh_id = pos + 2; 760 parse->r0kh_id_len = pos[1]; 761 break; 762 } 763 764 pos += 2 + pos[1]; 765 } 766 767 return 0; 768} 769 770 771static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, 772 struct wpa_ft_ies *parse) 773{ 774 const u8 *end, *pos; 775 struct wpa_ie_data data; 776 int ret; 777 const struct rsn_ftie *ftie; 778 int prot_ie_count = 0; 779 780 os_memset(parse, 0, sizeof(*parse)); 781 if (ies == NULL) 782 return 0; 783 784 pos = ies; 785 end = ies + ies_len; 786 while (pos + 2 <= end && pos + 2 + pos[1] <= end) { 787 switch (pos[0]) { 788 case WLAN_EID_RSN: 789 parse->rsn = pos + 2; 790 parse->rsn_len = pos[1]; 791 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2, 792 parse->rsn_len + 2, 793 &data); 794 if (ret < 0) { 795 wpa_printf(MSG_DEBUG, "FT: Failed to parse " 796 "RSN IE: %d", ret); 797 return -1; 798 } 799 if (data.num_pmkid == 1 && data.pmkid) 800 parse->rsn_pmkid = data.pmkid; 801 break; 802 case WLAN_EID_MOBILITY_DOMAIN: 803 parse->mdie = pos + 2; 804 parse->mdie_len = pos[1]; 805 break; 806 case WLAN_EID_FAST_BSS_TRANSITION: 807 if (pos[1] < sizeof(*ftie)) 808 return -1; 809 ftie = (const struct rsn_ftie *) (pos + 2); 810 prot_ie_count = ftie->mic_control[1]; 811 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0) 812 return -1; 813 break; 814 case WLAN_EID_RIC_DATA: 815 if (parse->ric == NULL) 816 parse->ric = pos; 817 } 818 819 pos += 2 + pos[1]; 820 } 821 822 if (prot_ie_count == 0) 823 return 0; /* no MIC */ 824 825 /* 826 * Check that the protected IE count matches with IEs included in the 827 * frame. 828 */ 829 if (parse->rsn) 830 prot_ie_count--; 831 if (parse->mdie) 832 prot_ie_count--; 833 if (parse->ftie) 834 prot_ie_count--; 835 if (prot_ie_count < 0) { 836 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in " 837 "the protected IE count"); 838 return -1; 839 } 840 841 if (prot_ie_count == 0 && parse->ric) { 842 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not " 843 "included in protected IE count"); 844 return -1; 845 } 846 847 /* Determine the end of the RIC IE(s) */ 848 pos = parse->ric; 849 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end && 850 prot_ie_count) { 851 prot_ie_count--; 852 pos += 2 + pos[1]; 853 } 854 parse->ric_len = pos - parse->ric; 855 if (prot_ie_count) { 856 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from " 857 "frame", (int) prot_ie_count); 858 return -1; 859 } 860 861 return 0; 862} 863 864 865static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, 866 int vlan_id, 867 enum wpa_alg alg, const u8 *addr, int idx, 868 u8 *key, size_t key_len) 869{ 870 if (wpa_auth->cb.set_key == NULL) 871 return -1; 872 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx, 873 key, key_len); 874} 875 876 877void wpa_ft_install_ptk(struct wpa_state_machine *sm) 878{ 879 enum wpa_alg alg; 880 int klen; 881 882 /* MLME-SETKEYS.request(PTK) */ 883 if (sm->pairwise == WPA_CIPHER_TKIP) { 884 alg = WPA_ALG_TKIP; 885 klen = 32; 886 } else if (sm->pairwise == WPA_CIPHER_CCMP) { 887 alg = WPA_ALG_CCMP; 888 klen = 16; 889 } else { 890 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip " 891 "PTK configuration", sm->pairwise); 892 return; 893 } 894 895 /* FIX: add STA entry to kernel/driver here? The set_key will fail 896 * most likely without this.. At the moment, STA entry is added only 897 * after association has been completed. This function will be called 898 * again after association to get the PTK configured, but that could be 899 * optimized by adding the STA entry earlier. 900 */ 901 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, 902 sm->PTK.tk1, klen)) 903 return; 904 905 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ 906 sm->pairwise_set = TRUE; 907} 908 909 910static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm, 911 const u8 *ies, size_t ies_len, 912 u8 **resp_ies, size_t *resp_ies_len) 913{ 914 struct rsn_mdie *mdie; 915 struct rsn_ftie *ftie; 916 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN]; 917 u8 ptk_name[WPA_PMK_NAME_LEN]; 918 struct wpa_auth_config *conf; 919 struct wpa_ft_ies parse; 920 size_t buflen, ptk_len; 921 int ret; 922 u8 *pos, *end; 923 int pairwise; 924 925 *resp_ies = NULL; 926 *resp_ies_len = 0; 927 928 sm->pmk_r1_name_valid = 0; 929 conf = &sm->wpa_auth->conf; 930 931 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs", 932 ies, ies_len); 933 934 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) { 935 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs"); 936 return WLAN_STATUS_UNSPECIFIED_FAILURE; 937 } 938 939 mdie = (struct rsn_mdie *) parse.mdie; 940 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) || 941 os_memcmp(mdie->mobility_domain, 942 sm->wpa_auth->conf.mobility_domain, 943 MOBILITY_DOMAIN_ID_LEN) != 0) { 944 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE"); 945 return WLAN_STATUS_INVALID_MDIE; 946 } 947 948 ftie = (struct rsn_ftie *) parse.ftie; 949 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) { 950 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE"); 951 return WLAN_STATUS_INVALID_FTIE; 952 } 953 954 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN); 955 956 if (parse.r0kh_id == NULL) { 957 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID"); 958 return WLAN_STATUS_INVALID_FTIE; 959 } 960 961 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID", 962 parse.r0kh_id, parse.r0kh_id_len); 963 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len); 964 sm->r0kh_id_len = parse.r0kh_id_len; 965 966 if (parse.rsn_pmkid == NULL) { 967 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE"); 968 return WLAN_STATUS_INVALID_PMKID; 969 } 970 971 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name", 972 parse.rsn_pmkid, WPA_PMK_NAME_LEN); 973 wpa_derive_pmk_r1_name(parse.rsn_pmkid, 974 sm->wpa_auth->conf.r1_key_holder, sm->addr, 975 pmk_r1_name); 976 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name", 977 pmk_r1_name, WPA_PMK_NAME_LEN); 978 979 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1, 980 &pairwise) < 0) { 981 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id, 982 sm->r0kh_id_len, parse.rsn_pmkid) < 0) { 983 wpa_printf(MSG_DEBUG, "FT: Did not have matching " 984 "PMK-R1 and unknown R0KH-ID"); 985 return WLAN_STATUS_INVALID_PMKID; 986 } 987 988 /* 989 * TODO: Should return "status pending" (and the caller should 990 * not send out response now). The real response will be sent 991 * once the response from R0KH is received. 992 */ 993 return WLAN_STATUS_INVALID_PMKID; 994 } 995 996 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN); 997 sm->pmk_r1_name_valid = 1; 998 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN); 999 1000 if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) { 1001 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for " 1002 "ANonce"); 1003 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1004 } 1005 1006 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce", 1007 sm->SNonce, WPA_NONCE_LEN); 1008 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce", 1009 sm->ANonce, WPA_NONCE_LEN); 1010 1011 ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48; 1012 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr, 1013 sm->wpa_auth->addr, pmk_r1_name, 1014 (u8 *) &sm->PTK, ptk_len, ptk_name); 1015 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", 1016 (u8 *) &sm->PTK, ptk_len); 1017 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN); 1018 1019 sm->pairwise = pairwise; 1020 wpa_ft_install_ptk(sm); 1021 1022 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) + 1023 2 + FT_R1KH_ID_LEN + 200; 1024 *resp_ies = os_zalloc(buflen); 1025 if (*resp_ies == NULL) { 1026 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1027 } 1028 1029 pos = *resp_ies; 1030 end = *resp_ies + buflen; 1031 1032 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid); 1033 if (ret < 0) { 1034 os_free(*resp_ies); 1035 *resp_ies = NULL; 1036 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1037 } 1038 pos += ret; 1039 1040 ret = wpa_write_mdie(conf, pos, end - pos); 1041 if (ret < 0) { 1042 os_free(*resp_ies); 1043 *resp_ies = NULL; 1044 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1045 } 1046 pos += ret; 1047 1048 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len, 1049 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0); 1050 if (ret < 0) { 1051 os_free(*resp_ies); 1052 *resp_ies = NULL; 1053 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1054 } 1055 pos += ret; 1056 1057 *resp_ies_len = pos - *resp_ies; 1058 1059 return WLAN_STATUS_SUCCESS; 1060} 1061 1062 1063void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid, 1064 u16 auth_transaction, const u8 *ies, size_t ies_len, 1065 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid, 1066 u16 auth_transaction, u16 status, 1067 const u8 *ies, size_t ies_len), 1068 void *ctx) 1069{ 1070 u16 status; 1071 u8 *resp_ies; 1072 size_t resp_ies_len; 1073 1074 if (sm == NULL) { 1075 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but " 1076 "WPA SM not available"); 1077 return; 1078 } 1079 1080 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR 1081 " BSSID=" MACSTR " transaction=%d", 1082 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction); 1083 status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies, 1084 &resp_ies_len); 1085 1086 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR 1087 " auth_transaction=%d status=%d", 1088 MAC2STR(sm->addr), auth_transaction + 1, status); 1089 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len); 1090 cb(ctx, sm->addr, bssid, auth_transaction + 1, status, 1091 resp_ies, resp_ies_len); 1092 os_free(resp_ies); 1093} 1094 1095 1096u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies, 1097 size_t ies_len) 1098{ 1099 struct wpa_ft_ies parse; 1100 struct rsn_mdie *mdie; 1101 struct rsn_ftie *ftie; 1102 u8 mic[16]; 1103 unsigned int count; 1104 1105 if (sm == NULL) 1106 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1107 1108 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len); 1109 1110 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) { 1111 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs"); 1112 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1113 } 1114 1115 if (parse.rsn == NULL) { 1116 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req"); 1117 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1118 } 1119 1120 if (parse.rsn_pmkid == NULL) { 1121 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE"); 1122 return WLAN_STATUS_INVALID_PMKID; 1123 } 1124 1125 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) 1126 { 1127 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match " 1128 "with the PMKR1Name derived from auth request"); 1129 return WLAN_STATUS_INVALID_PMKID; 1130 } 1131 1132 mdie = (struct rsn_mdie *) parse.mdie; 1133 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) || 1134 os_memcmp(mdie->mobility_domain, 1135 sm->wpa_auth->conf.mobility_domain, 1136 MOBILITY_DOMAIN_ID_LEN) != 0) { 1137 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE"); 1138 return WLAN_STATUS_INVALID_MDIE; 1139 } 1140 1141 ftie = (struct rsn_ftie *) parse.ftie; 1142 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) { 1143 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE"); 1144 return WLAN_STATUS_INVALID_FTIE; 1145 } 1146 1147 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) { 1148 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE"); 1149 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce", 1150 ftie->snonce, WPA_NONCE_LEN); 1151 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce", 1152 sm->SNonce, WPA_NONCE_LEN); 1153 return -1; 1154 } 1155 1156 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) { 1157 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE"); 1158 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce", 1159 ftie->anonce, WPA_NONCE_LEN); 1160 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce", 1161 sm->ANonce, WPA_NONCE_LEN); 1162 return -1; 1163 } 1164 1165 1166 if (parse.r0kh_id == NULL) { 1167 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE"); 1168 return -1; 1169 } 1170 1171 if (parse.r0kh_id_len != sm->r0kh_id_len || 1172 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) { 1173 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with " 1174 "the current R0KH-ID"); 1175 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE", 1176 parse.r0kh_id, parse.r0kh_id_len); 1177 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID", 1178 sm->r0kh_id, sm->r0kh_id_len); 1179 return -1; 1180 } 1181 1182 if (parse.r1kh_id == NULL) { 1183 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE"); 1184 return -1; 1185 } 1186 1187 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder, 1188 FT_R1KH_ID_LEN) != 0) { 1189 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in " 1190 "ReassocReq"); 1191 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE", 1192 parse.r1kh_id, FT_R1KH_ID_LEN); 1193 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID", 1194 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN); 1195 return -1; 1196 } 1197 1198 if (parse.rsn_pmkid == NULL || 1199 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) { 1200 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in " 1201 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid); 1202 return -1; 1203 } 1204 1205 count = 3; 1206 if (parse.ric) 1207 count++; 1208 if (ftie->mic_control[1] != count) { 1209 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC " 1210 "Control: received %u expected %u", 1211 ftie->mic_control[1], count); 1212 return -1; 1213 } 1214 1215 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5, 1216 parse.mdie - 2, parse.mdie_len + 2, 1217 parse.ftie - 2, parse.ftie_len + 2, 1218 parse.rsn - 2, parse.rsn_len + 2, 1219 parse.ric, parse.ric_len, 1220 mic) < 0) { 1221 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC"); 1222 return WLAN_STATUS_UNSPECIFIED_FAILURE; 1223 } 1224 1225 if (os_memcmp(mic, ftie->mic, 16) != 0) { 1226 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE"); 1227 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16); 1228 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16); 1229 return WLAN_STATUS_INVALID_FTIE; 1230 } 1231 1232 return WLAN_STATUS_SUCCESS; 1233} 1234 1235 1236int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len) 1237{ 1238 const u8 *sta_addr, *target_ap; 1239 const u8 *ies; 1240 size_t ies_len; 1241 u8 action; 1242 struct ft_rrb_frame *frame; 1243 1244 if (sm == NULL) 1245 return -1; 1246 1247 /* 1248 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6] 1249 * FT Request action frame body[variable] 1250 */ 1251 1252 if (len < 14) { 1253 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame " 1254 "(len=%lu)", (unsigned long) len); 1255 return -1; 1256 } 1257 1258 action = data[1]; 1259 sta_addr = data + 2; 1260 target_ap = data + 8; 1261 ies = data + 14; 1262 ies_len = len - 14; 1263 1264 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR 1265 " Target AP=" MACSTR " Action=%d)", 1266 MAC2STR(sta_addr), MAC2STR(target_ap), action); 1267 1268 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) { 1269 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: " 1270 "STA=" MACSTR " STA-Address=" MACSTR, 1271 MAC2STR(sm->addr), MAC2STR(sta_addr)); 1272 return -1; 1273 } 1274 1275 /* 1276 * Do some sanity checking on the target AP address (not own and not 1277 * broadcast. This could be extended to filter based on a list of known 1278 * APs in the MD (if such a list were configured). 1279 */ 1280 if ((target_ap[0] & 0x01) || 1281 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) { 1282 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action " 1283 "frame"); 1284 return -1; 1285 } 1286 1287 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len); 1288 1289 /* RRB - Forward action frame to the target AP */ 1290 frame = os_malloc(sizeof(*frame) + len); 1291 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; 1292 frame->packet_type = FT_PACKET_REQUEST; 1293 frame->action_length = host_to_le16(len); 1294 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN); 1295 os_memcpy(frame + 1, data, len); 1296 1297 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame, 1298 sizeof(*frame) + len); 1299 os_free(frame); 1300 1301 return 0; 1302} 1303 1304 1305static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth, 1306 const u8 *current_ap, const u8 *sta_addr, 1307 const u8 *body, size_t len) 1308{ 1309 struct wpa_state_machine *sm; 1310 u16 status; 1311 u8 *resp_ies, *pos; 1312 size_t resp_ies_len, rlen; 1313 struct ft_rrb_frame *frame; 1314 1315 sm = wpa_ft_add_sta(wpa_auth, sta_addr); 1316 if (sm == NULL) { 1317 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on " 1318 "RRB Request"); 1319 return -1; 1320 } 1321 1322 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len); 1323 1324 status = wpa_ft_process_auth_req(sm, body, len, &resp_ies, 1325 &resp_ies_len); 1326 1327 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR 1328 " CurrentAP=" MACSTR " status=%d", 1329 MAC2STR(sm->addr), MAC2STR(current_ap), status); 1330 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len); 1331 1332 /* RRB - Forward action frame response to the Current AP */ 1333 1334 /* 1335 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6] 1336 * Status_Code[2] FT Request action frame body[variable] 1337 */ 1338 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len; 1339 1340 frame = os_malloc(sizeof(*frame) + rlen); 1341 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; 1342 frame->packet_type = FT_PACKET_RESPONSE; 1343 frame->action_length = host_to_le16(rlen); 1344 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN); 1345 pos = (u8 *) (frame + 1); 1346 *pos++ = WLAN_ACTION_FT; 1347 *pos++ = 2; /* Action: Response */ 1348 os_memcpy(pos, sta_addr, ETH_ALEN); 1349 pos += ETH_ALEN; 1350 os_memcpy(pos, wpa_auth->addr, ETH_ALEN); 1351 pos += ETH_ALEN; 1352 WPA_PUT_LE16(pos, status); 1353 pos += 2; 1354 if (resp_ies) { 1355 os_memcpy(pos, resp_ies, resp_ies_len); 1356 os_free(resp_ies); 1357 } 1358 1359 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame, 1360 sizeof(*frame) + rlen); 1361 os_free(frame); 1362 1363 return 0; 1364} 1365 1366 1367static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth, 1368 const u8 *src_addr, 1369 const u8 *data, size_t data_len) 1370{ 1371 struct ft_r0kh_r1kh_pull_frame *frame, f; 1372 struct ft_remote_r1kh *r1kh; 1373 struct ft_r0kh_r1kh_resp_frame resp, r; 1374 u8 pmk_r0[PMK_LEN]; 1375 int pairwise; 1376 1377 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull"); 1378 1379 if (data_len < sizeof(*frame)) 1380 return -1; 1381 1382 r1kh = wpa_auth->conf.r1kh_list; 1383 while (r1kh) { 1384 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0) 1385 break; 1386 r1kh = r1kh->next; 1387 } 1388 if (r1kh == NULL) { 1389 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for " 1390 "PMK-R1 pull source address " MACSTR, 1391 MAC2STR(src_addr)); 1392 return -1; 1393 } 1394 1395 frame = (struct ft_r0kh_r1kh_pull_frame *) data; 1396 /* aes_unwrap() does not support inplace decryption, so use a temporary 1397 * buffer for the data. */ 1398 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8, 1399 frame->nonce, f.nonce) < 0) { 1400 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull " 1401 "request from " MACSTR, MAC2STR(src_addr)); 1402 return -1; 1403 } 1404 1405 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce", 1406 f.nonce, sizeof(f.nonce)); 1407 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name", 1408 f.pmk_r0_name, WPA_PMK_NAME_LEN); 1409 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID=" 1410 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id)); 1411 1412 os_memset(&resp, 0, sizeof(resp)); 1413 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; 1414 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP; 1415 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN); 1416 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN); 1417 1418 /* aes_wrap() does not support inplace encryption, so use a temporary 1419 * buffer for the data. */ 1420 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce)); 1421 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN); 1422 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN); 1423 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0, 1424 &pairwise) < 0) { 1425 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for " 1426 "PMK-R1 pull"); 1427 return -1; 1428 } 1429 1430 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id, 1431 r.pmk_r1, r.pmk_r1_name); 1432 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN); 1433 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name, 1434 WPA_PMK_NAME_LEN); 1435 r.pairwise = host_to_le16(pairwise); 1436 1437 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8, 1438 r.nonce, resp.nonce) < 0) { 1439 os_memset(pmk_r0, 0, PMK_LEN); 1440 return -1; 1441 } 1442 1443 os_memset(pmk_r0, 0, PMK_LEN); 1444 1445 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp)); 1446 1447 return 0; 1448} 1449 1450 1451static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth, 1452 const u8 *src_addr, 1453 const u8 *data, size_t data_len) 1454{ 1455 struct ft_r0kh_r1kh_resp_frame *frame, f; 1456 struct ft_remote_r0kh *r0kh; 1457 int pairwise; 1458 1459 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response"); 1460 1461 if (data_len < sizeof(*frame)) 1462 return -1; 1463 1464 r0kh = wpa_auth->conf.r0kh_list; 1465 while (r0kh) { 1466 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0) 1467 break; 1468 r0kh = r0kh->next; 1469 } 1470 if (r0kh == NULL) { 1471 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for " 1472 "PMK-R0 pull response source address " MACSTR, 1473 MAC2STR(src_addr)); 1474 return -1; 1475 } 1476 1477 frame = (struct ft_r0kh_r1kh_resp_frame *) data; 1478 /* aes_unwrap() does not support inplace decryption, so use a temporary 1479 * buffer for the data. */ 1480 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8, 1481 frame->nonce, f.nonce) < 0) { 1482 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull " 1483 "response from " MACSTR, MAC2STR(src_addr)); 1484 return -1; 1485 } 1486 1487 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN) 1488 != 0) { 1489 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a " 1490 "matching R1KH-ID"); 1491 return -1; 1492 } 1493 1494 /* TODO: verify that <nonce,s1kh_id> matches with a pending request 1495 * and call this requests callback function to finish request 1496 * processing */ 1497 1498 pairwise = le_to_host16(f.pairwise); 1499 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce", 1500 f.nonce, sizeof(f.nonce)); 1501 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID=" 1502 MACSTR " pairwise=0x%x", 1503 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise); 1504 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1", 1505 f.pmk_r1, PMK_LEN); 1506 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name", 1507 f.pmk_r1_name, WPA_PMK_NAME_LEN); 1508 1509 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name, 1510 pairwise); 1511 os_memset(f.pmk_r1, 0, PMK_LEN); 1512 1513 return 0; 1514} 1515 1516 1517static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth, 1518 const u8 *src_addr, 1519 const u8 *data, size_t data_len) 1520{ 1521 struct ft_r0kh_r1kh_push_frame *frame, f; 1522 struct ft_remote_r0kh *r0kh; 1523 struct os_time now; 1524 os_time_t tsend; 1525 int pairwise; 1526 1527 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push"); 1528 1529 if (data_len < sizeof(*frame)) 1530 return -1; 1531 1532 r0kh = wpa_auth->conf.r0kh_list; 1533 while (r0kh) { 1534 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0) 1535 break; 1536 r0kh = r0kh->next; 1537 } 1538 if (r0kh == NULL) { 1539 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for " 1540 "PMK-R0 push source address " MACSTR, 1541 MAC2STR(src_addr)); 1542 return -1; 1543 } 1544 1545 frame = (struct ft_r0kh_r1kh_push_frame *) data; 1546 /* aes_unwrap() does not support inplace decryption, so use a temporary 1547 * buffer for the data. */ 1548 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8, 1549 frame->timestamp, f.timestamp) < 0) { 1550 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from " 1551 MACSTR, MAC2STR(src_addr)); 1552 return -1; 1553 } 1554 1555 os_get_time(&now); 1556 tsend = WPA_GET_LE32(f.timestamp); 1557 if ((now.sec > tsend && now.sec - tsend > 60) || 1558 (now.sec < tsend && tsend - now.sec > 60)) { 1559 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid " 1560 "timestamp: sender time %d own time %d\n", 1561 (int) tsend, (int) now.sec); 1562 return -1; 1563 } 1564 1565 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN) 1566 != 0) { 1567 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching " 1568 "R1KH-ID (received " MACSTR " own " MACSTR ")", 1569 MAC2STR(f.r1kh_id), 1570 MAC2STR(wpa_auth->conf.r1_key_holder)); 1571 return -1; 1572 } 1573 1574 pairwise = le_to_host16(f.pairwise); 1575 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID=" 1576 MACSTR " pairwise=0x%x", 1577 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise); 1578 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1", 1579 f.pmk_r1, PMK_LEN); 1580 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name", 1581 f.pmk_r1_name, WPA_PMK_NAME_LEN); 1582 1583 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name, 1584 pairwise); 1585 os_memset(f.pmk_r1, 0, PMK_LEN); 1586 1587 return 0; 1588} 1589 1590 1591int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr, 1592 const u8 *data, size_t data_len) 1593{ 1594 struct ft_rrb_frame *frame; 1595 u16 alen; 1596 const u8 *pos, *end, *start; 1597 u8 action; 1598 const u8 *sta_addr, *target_ap_addr; 1599 1600 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR, 1601 MAC2STR(src_addr)); 1602 1603 if (data_len < sizeof(*frame)) { 1604 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)", 1605 (unsigned long) data_len); 1606 return -1; 1607 } 1608 1609 pos = data; 1610 frame = (struct ft_rrb_frame *) pos; 1611 pos += sizeof(*frame); 1612 1613 alen = le_to_host16(frame->action_length); 1614 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d " 1615 "action_length=%d ap_address=" MACSTR, 1616 frame->frame_type, frame->packet_type, alen, 1617 MAC2STR(frame->ap_address)); 1618 1619 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) { 1620 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */ 1621 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with " 1622 "unrecognized type %d", frame->frame_type); 1623 return -1; 1624 } 1625 1626 if (alen > data_len - sizeof(*frame)) { 1627 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action " 1628 "frame"); 1629 return -1; 1630 } 1631 1632 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL) 1633 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len); 1634 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP) 1635 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len); 1636 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH) 1637 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len); 1638 1639 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen); 1640 1641 if (alen < 1 + 1 + 2 * ETH_ALEN) { 1642 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough " 1643 "room for Action Frame body); alen=%lu", 1644 (unsigned long) alen); 1645 return -1; 1646 } 1647 start = pos; 1648 end = pos + alen; 1649 1650 if (*pos != WLAN_ACTION_FT) { 1651 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category " 1652 "%d", *pos); 1653 return -1; 1654 } 1655 1656 pos++; 1657 action = *pos++; 1658 sta_addr = pos; 1659 pos += ETH_ALEN; 1660 target_ap_addr = pos; 1661 pos += ETH_ALEN; 1662 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr=" 1663 MACSTR " target_ap_addr=" MACSTR, 1664 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr)); 1665 1666 if (frame->packet_type == FT_PACKET_REQUEST) { 1667 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request"); 1668 1669 if (action != 1) { 1670 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in " 1671 "RRB Request", action); 1672 return -1; 1673 } 1674 1675 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) { 1676 wpa_printf(MSG_DEBUG, "FT: Target AP address in the " 1677 "RRB Request does not match with own " 1678 "address"); 1679 return -1; 1680 } 1681 1682 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address, 1683 sta_addr, pos, end - pos) < 0) 1684 return -1; 1685 } else if (frame->packet_type == FT_PACKET_RESPONSE) { 1686 u16 status_code; 1687 1688 if (end - pos < 2) { 1689 wpa_printf(MSG_DEBUG, "FT: Not enough room for status " 1690 "code in RRB Response"); 1691 return -1; 1692 } 1693 status_code = WPA_GET_LE16(pos); 1694 pos += 2; 1695 1696 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response " 1697 "(status_code=%d)", status_code); 1698 1699 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0) 1700 return -1; 1701 } else { 1702 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown " 1703 "packet_type %d", frame->packet_type); 1704 return -1; 1705 } 1706 1707 return 0; 1708} 1709 1710 1711static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth, 1712 struct wpa_ft_pmk_r0_sa *pmk_r0, 1713 struct ft_remote_r1kh *r1kh, 1714 const u8 *s1kh_id, int pairwise) 1715{ 1716 struct ft_r0kh_r1kh_push_frame frame, f; 1717 struct os_time now; 1718 1719 os_memset(&frame, 0, sizeof(frame)); 1720 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB; 1721 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH; 1722 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN); 1723 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN); 1724 1725 /* aes_wrap() does not support inplace encryption, so use a temporary 1726 * buffer for the data. */ 1727 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN); 1728 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN); 1729 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN); 1730 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id, 1731 s1kh_id, f.pmk_r1, f.pmk_r1_name); 1732 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id)); 1733 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN); 1734 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name, 1735 WPA_PMK_NAME_LEN); 1736 os_get_time(&now); 1737 WPA_PUT_LE32(f.timestamp, now.sec); 1738 f.pairwise = host_to_le16(pairwise); 1739 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8, 1740 f.timestamp, frame.timestamp) < 0) 1741 return; 1742 1743 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame)); 1744} 1745 1746 1747void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr) 1748{ 1749 struct wpa_ft_pmk_r0_sa *r0; 1750 struct ft_remote_r1kh *r1kh; 1751 1752 if (!wpa_auth->conf.pmk_r1_push) 1753 return; 1754 1755 r0 = wpa_auth->ft_pmk_cache->pmk_r0; 1756 while (r0) { 1757 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) 1758 break; 1759 r0 = r0->next; 1760 } 1761 1762 if (r0 == NULL || r0->pmk_r1_pushed) 1763 return; 1764 r0->pmk_r1_pushed = 1; 1765 1766 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs " 1767 "for STA " MACSTR, MAC2STR(addr)); 1768 1769 r1kh = wpa_auth->conf.r1kh_list; 1770 while (r1kh) { 1771 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise); 1772 r1kh = r1kh->next; 1773 } 1774} 1775 1776#endif /* CONFIG_IEEE80211R */ 1777