hostapd/wpa_ft.c

   1 /*
   2  * hostapd - IEEE 802.11r - Fast BSS Transition
   3  * Copyright (c) 2004-2007, 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 "includes.h"
  16
  17 #include "common.h"
  18 #include "crypto/aes_wrap.h"
  19 #include "config.h"
  20 #include "wpa.h"
  21 #include "ieee802_11.h"
  22 #include "wme.h"
  23 #include "wpa_auth_i.h"
  24 #include "wpa_auth_ie.h"
  25
  26
  27 #ifdef CONFIG_IEEE80211R
  28
  29 struct wpa_ft_ies {
  30         const u8 *mdie;
  31         size_t mdie_len;
  32         const u8 *ftie;
  33         size_t ftie_len;
  34         const u8 *r1kh_id;
  35         const u8 *gtk;
  36         size_t gtk_len;
  37         const u8 *r0kh_id;
  38         size_t r0kh_id_len;
  39         const u8 *rsn;
  40         size_t rsn_len;
  41         const u8 *rsn_pmkid;
  42         const u8 *ric;
  43         size_t ric_len;
  44 };
  45
  46
  47 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
  48                             struct wpa_ft_ies *parse);
  49
  50
  51 static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
  52                            const u8 *data, size_t data_len)
  53 {
  54         if (wpa_auth->cb.send_ether == NULL)
  55                 return -1;
  56         return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
  57                                        data, data_len);
  58 }
  59
  60
  61 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
  62                               const u8 *dst, const u8 *data, size_t data_len)
  63 {
  64         if (wpa_auth->cb.send_ft_action == NULL)
  65                 return -1;
  66         return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
  67                                            data, data_len);
  68 }
  69
  70
  71 static struct wpa_state_machine *
  72 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
  73 {
  74         if (wpa_auth->cb.add_sta == NULL)
  75                 return NULL;
  76         return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
  77 }
  78
  79
  80 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
  81 {
  82         u8 *pos = buf;
  83         u8 capab;
  84         if (len < 2 + sizeof(struct rsn_mdie))
  85                 return -1;
  86
  87         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
  88         *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
  89         os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
  90         pos += MOBILITY_DOMAIN_ID_LEN;
  91         capab = RSN_FT_CAPAB_FT_OVER_DS;
  92         *pos++ = capab;
  93
  94         return pos - buf;
  95 }
  96
  97
  98 static int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
  99                           size_t r0kh_id_len,
 100                           const u8 *anonce, const u8 *snonce,
 101                           u8 *buf, size_t len, const u8 *subelem,
 102                           size_t subelem_len)
 103 {
 104         u8 *pos = buf, *ielen;
 105         struct rsn_ftie *hdr;
 106
 107         if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
 108             subelem_len)
 109                 return -1;
 110
 111         *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
 112         ielen = pos++;
 113
 114         hdr = (struct rsn_ftie *) pos;
 115         os_memset(hdr, 0, sizeof(*hdr));
 116         pos += sizeof(*hdr);
 117         WPA_PUT_LE16(hdr->mic_control, 0);
 118         if (anonce)
 119                 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
 120         if (snonce)
 121                 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
 122
 123         /* Optional Parameters */
 124         *pos++ = FTIE_SUBELEM_R1KH_ID;
 125         *pos++ = FT_R1KH_ID_LEN;
 126         os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
 127         pos += FT_R1KH_ID_LEN;
 128
 129         if (r0kh_id) {
 130                 *pos++ = FTIE_SUBELEM_R0KH_ID;
 131                 *pos++ = r0kh_id_len;
 132                 os_memcpy(pos, r0kh_id, r0kh_id_len);
 133                 pos += r0kh_id_len;
 134         }
 135
 136         if (subelem) {
 137                 os_memcpy(pos, subelem, subelem_len);
 138                 pos += subelem_len;
 139         }
 140
 141         *ielen = pos - buf - 2;
 142
 143         return pos - buf;
 144 }
 145
 146
 147 struct wpa_ft_pmk_r0_sa {
 148         struct wpa_ft_pmk_r0_sa *next;
 149         u8 pmk_r0[PMK_LEN];
 150         u8 pmk_r0_name[WPA_PMK_NAME_LEN];
 151         u8 spa[ETH_ALEN];
 152         /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
 153         int pmk_r1_pushed;
 154 };
 155
 156 struct wpa_ft_pmk_r1_sa {
 157         struct wpa_ft_pmk_r1_sa *next;
 158         u8 pmk_r1[PMK_LEN];
 159         u8 pmk_r1_name[WPA_PMK_NAME_LEN];
 160         u8 spa[ETH_ALEN];
 161         /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
 162 };
 163
 164 struct wpa_ft_pmk_cache {
 165         struct wpa_ft_pmk_r0_sa *pmk_r0;
 166         struct wpa_ft_pmk_r1_sa *pmk_r1;
 167 };
 168
 169 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
 170 {
 171         struct wpa_ft_pmk_cache *cache;
 172
 173         cache = os_zalloc(sizeof(*cache));
 174
 175         return cache;
 176 }
 177
 178
 179 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
 180 {
 181         struct wpa_ft_pmk_r0_sa *r0, *r0prev;
 182         struct wpa_ft_pmk_r1_sa *r1, *r1prev;
 183
 184         r0 = cache->pmk_r0;
 185         while (r0) {
 186                 r0prev = r0;
 187                 r0 = r0->next;
 188                 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
 189                 os_free(r0prev);
 190         }
 191
 192         r1 = cache->pmk_r1;
 193         while (r1) {
 194                 r1prev = r1;
 195                 r1 = r1->next;
 196                 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
 197                 os_free(r1prev);
 198         }
 199
 200         os_free(cache);
 201 }
 202
 203
 204 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
 205                                const u8 *spa, const u8 *pmk_r0,
 206                                const u8 *pmk_r0_name)
 207 {
 208         struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
 209         struct wpa_ft_pmk_r0_sa *r0;
 210
 211         /* TODO: add expiration and limit on number of entries in cache */
 212
 213         r0 = os_zalloc(sizeof(*r0));
 214         if (r0 == NULL)
 215                 return -1;
 216
 217         os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
 218         os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
 219         os_memcpy(r0->spa, spa, ETH_ALEN);
 220
 221         r0->next = cache->pmk_r0;
 222         cache->pmk_r0 = r0;
 223
 224         return 0;
 225 }
 226
 227
 228 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
 229                                const u8 *spa, const u8 *pmk_r0_name,
 230                                u8 *pmk_r0)
 231 {
 232         struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
 233         struct wpa_ft_pmk_r0_sa *r0;
 234
 235         r0 = cache->pmk_r0;
 236         while (r0) {
 237                 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
 238                     os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
 239                     == 0) {
 240                         os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
 241                         return 0;
 242                 }
 243
 244                 r0 = r0->next;
 245         }
 246
 247         return -1;
 248 }
 249
 250
 251 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
 252                                const u8 *spa, const u8 *pmk_r1,
 253                                const u8 *pmk_r1_name)
 254 {
 255         struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
 256         struct wpa_ft_pmk_r1_sa *r1;
 257
 258         /* TODO: add expiration and limit on number of entries in cache */
 259
 260         r1 = os_zalloc(sizeof(*r1));
 261         if (r1 == NULL)
 262                 return -1;
 263
 264         os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
 265         os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
 266         os_memcpy(r1->spa, spa, ETH_ALEN);
 267
 268         r1->next = cache->pmk_r1;
 269         cache->pmk_r1 = r1;
 270
 271         return 0;
 272 }
 273
 274
 275 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
 276                                const u8 *spa, const u8 *pmk_r1_name,
 277                                u8 *pmk_r1)
 278 {
 279         struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
 280         struct wpa_ft_pmk_r1_sa *r1;
 281
 282         r1 = cache->pmk_r1;
 283         while (r1) {
 284                 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
 285                     os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
 286                     == 0) {
 287                         os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
 288                         return 0;
 289                 }
 290
 291                 r1 = r1->next;
 292         }
 293
 294         return -1;
 295 }
 296
 297
 298 static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
 299                               const u8 *s1kh_id, const u8 *r0kh_id,
 300                               size_t r0kh_id_len, const u8 *pmk_r0_name)
 301 {
 302         struct ft_remote_r0kh *r0kh;
 303         struct ft_r0kh_r1kh_pull_frame frame, f;
 304
 305         r0kh = wpa_auth->conf.r0kh_list;
 306         while (r0kh) {
 307                 if (r0kh->id_len == r0kh_id_len &&
 308                     os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
 309                         break;
 310                 r0kh = r0kh->next;
 311         }
 312         if (r0kh == NULL)
 313                 return -1;
 314
 315         wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
 316                    "address " MACSTR, MAC2STR(r0kh->addr));
 317
 318         os_memset(&frame, 0, sizeof(frame));
 319         frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
 320         frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
 321         frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
 322         os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
 323
 324         /* aes_wrap() does not support inplace encryption, so use a temporary
 325          * buffer for the data. */
 326         if (os_get_random(f.nonce, sizeof(f.nonce))) {
 327                 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
 328                            "nonce");
 329                 return -1;
 330         }
 331         os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
 332         os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
 333         os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
 334
 335         if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
 336                      f.nonce, frame.nonce) < 0)
 337                 return -1;
 338
 339         wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
 340
 341         return 0;
 342 }
 343
 344
 345 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
 346                            struct wpa_ptk *ptk, size_t ptk_len)
 347 {
 348         u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
 349         u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
 350         u8 ptk_name[WPA_PMK_NAME_LEN];
 351         const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
 352         const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
 353         size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
 354         const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
 355         const u8 *ssid = sm->wpa_auth->conf.ssid;
 356         size_t ssid_len = sm->wpa_auth->conf.ssid_len;
 357
 358
 359         if (sm->xxkey_len == 0) {
 360                 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
 361                            "derivation");
 362                 return -1;
 363         }
 364
 365         wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
 366                           r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
 367         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
 368         wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
 369         wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name);
 370
 371         wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
 372                           pmk_r1, pmk_r1_name);
 373         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
 374         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
 375         wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_name);
 376
 377         wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
 378                           sm->wpa_auth->addr, pmk_r1_name,
 379                           (u8 *) ptk, ptk_len, ptk_name);
 380         wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
 381         wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
 382
 383         return 0;
 384 }
 385
 386
 387 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 388                                       const u8 *addr, int idx, u8 *seq)
 389 {
 390         if (wpa_auth->cb.get_seqnum == NULL)
 391                 return -1;
 392         return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
 393 }
 394
 395
 396 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
 397 {
 398         u8 *subelem;
 399         struct wpa_group *gsm = sm->group;
 400         size_t subelem_len, pad_len;
 401         const u8 *key;
 402         size_t key_len;
 403         u8 keybuf[32];
 404
 405         key_len = gsm->GTK_len;
 406         if (key_len > sizeof(keybuf))
 407                 return NULL;
 408
 409         /*
 410          * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
 411          * than 16 bytes.
 412          */
 413         pad_len = key_len % 8;
 414         if (pad_len)
 415                 pad_len = 8 - pad_len;
 416         if (key_len + pad_len < 16)
 417                 pad_len += 8;
 418         if (pad_len) {
 419                 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
 420                 os_memset(keybuf + key_len, 0, pad_len);
 421                 keybuf[key_len] = 0xdd;
 422                 key_len += pad_len;
 423                 key = keybuf;
 424         } else
 425                 key = gsm->GTK[gsm->GN - 1];
 426
 427         /*
 428          * Sub-elem ID[1] | Length[1] | Key Info[1] | Key Length[1] | RSC[8] |
 429          * Key[5..32].
 430          */
 431         subelem_len = 12 + key_len + 8;
 432         subelem = os_zalloc(subelem_len);
 433         if (subelem == NULL)
 434                 return NULL;
 435
 436         subelem[0] = FTIE_SUBELEM_GTK;
 437         subelem[1] = 10 + key_len + 8;
 438         subelem[2] = gsm->GN & 0x03; /* Key ID in B0-B1 of Key Info */
 439         subelem[3] = gsm->GTK_len;
 440         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 4);
 441         if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 12)) {
 442                 os_free(subelem);
 443                 return NULL;
 444         }
 445
 446         *len = subelem_len;
 447         return subelem;
 448 }
 449
 450
 451 #ifdef CONFIG_IEEE80211W
 452 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
 453 {
 454         u8 *subelem, *pos;
 455         struct wpa_group *gsm = sm->group;
 456         size_t subelem_len;
 457
 458         /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
 459          * Key[16+8] */
 460         subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
 461         subelem = os_zalloc(subelem_len);
 462         if (subelem == NULL)
 463                 return NULL;
 464
 465         pos = subelem;
 466         *pos++ = FTIE_SUBELEM_IGTK;
 467         *pos++ = subelem_len - 2;
 468         WPA_PUT_LE16(pos, gsm->GN_igtk);
 469         pos += 2;
 470         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
 471         pos += 6;
 472         *pos++ = WPA_IGTK_LEN;
 473         if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
 474                      gsm->IGTK[gsm->GN_igtk - 4], pos)) {
 475                 os_free(subelem);
 476                 return NULL;
 477         }
 478
 479         *len = subelem_len;
 480         return subelem;
 481 }
 482 #endif /* CONFIG_IEEE80211W */
 483
 484
 485 static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
 486                                 const u8 *ies, size_t ies_len)
 487 {
 488         struct ieee802_11_elems parse;
 489         struct rsn_rdie *rdie;
 490
 491         wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
 492                    id, descr_count);
 493         wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
 494                     ies, ies_len);
 495
 496         if (end - pos < (int) sizeof(*rdie)) {
 497                 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
 498                 return pos;
 499         }
 500
 501         *pos++ = WLAN_EID_RIC_DATA;
 502         *pos++ = sizeof(*rdie);
 503         rdie = (struct rsn_rdie *) pos;
 504         rdie->id = id;
 505         rdie->descr_count = 0;
 506         rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
 507         pos += sizeof(*rdie);
 508
 509         if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
 510             ParseFailed) {
 511                 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
 512                 rdie->status_code =
 513                         host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 514                 return pos;
 515         }
 516
 517 #ifdef NEED_AP_MLME
 518         if (parse.wmm_tspec) {
 519                 struct wmm_tspec_element *tspec;
 520                 int res;
 521
 522                 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
 523                         wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
 524                                    "(%d)", (int) parse.wmm_tspec_len);
 525                         rdie->status_code =
 526                                 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 527                         return pos;
 528                 }
 529                 if (end - pos < (int) sizeof(*tspec)) {
 530                         wpa_printf(MSG_ERROR, "FT: Not enough room for "
 531                                    "response TSPEC");
 532                         rdie->status_code =
 533                                 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 534                         return pos;
 535                 }
 536                 tspec = (struct wmm_tspec_element *) pos;
 537                 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
 538                 res = wmm_process_tspec(tspec);
 539                 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
 540                 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
 541                         rdie->status_code =
 542                                 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
 543                 else if (res == WMM_ADDTS_STATUS_REFUSED)
 544                         rdie->status_code =
 545                                 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
 546                 else {
 547                         /* TSPEC accepted; include updated TSPEC in response */
 548                         rdie->descr_count = 1;
 549                         pos += sizeof(*tspec);
 550                 }
 551                 return pos;
 552         }
 553 #endif /* NEED_AP_MLME */
 554
 555         wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
 556         rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 557         return pos;
 558 }
 559
 560
 561 static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
 562 {
 563         const u8 *rpos, *start;
 564         const struct rsn_rdie *rdie;
 565
 566         wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
 567
 568         rpos = ric;
 569         while (rpos + sizeof(*rdie) < ric + ric_len) {
 570                 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
 571                     rpos + 2 + rpos[1] > ric + ric_len)
 572                         break;
 573                 rdie = (const struct rsn_rdie *) (rpos + 2);
 574                 rpos += 2 + rpos[1];
 575                 start = rpos;
 576
 577                 while (rpos + 2 <= ric + ric_len &&
 578                        rpos + 2 + rpos[1] <= ric + ric_len) {
 579                         if (rpos[0] == WLAN_EID_RIC_DATA)
 580                                 break;
 581                         rpos += 2 + rpos[1];
 582                 }
 583                 pos = wpa_ft_process_rdie(pos, end, rdie->id,
 584                                           rdie->descr_count,
 585                                           start, rpos - start);
 586         }
 587
 588         return pos;
 589 }
 590
 591
 592 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
 593                                  size_t max_len, int auth_alg,
 594                                  const u8 *req_ies, size_t req_ies_len)
 595 {
 596         u8 *end, *mdie, *ftie, *rsnie, *r0kh_id, *subelem = NULL;
 597         size_t mdie_len, ftie_len, rsnie_len, r0kh_id_len, subelem_len = 0;
 598         int res;
 599         struct wpa_auth_config *conf;
 600         struct rsn_ftie *_ftie;
 601         struct wpa_ft_ies parse;
 602         u8 *ric_start;
 603
 604         if (sm == NULL)
 605                 return pos;
 606
 607         conf = &sm->wpa_auth->conf;
 608
 609         if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
 610             sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
 611                 return pos;
 612
 613         end = pos + max_len;
 614
 615         /* RSN */
 616         res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
 617         if (res < 0)
 618                 return pos;
 619         rsnie = pos;
 620         rsnie_len = res;
 621         pos += res;
 622
 623         /* Mobility Domain Information */
 624         res = wpa_write_mdie(conf, pos, end - pos);
 625         if (res < 0)
 626                 return pos;
 627         mdie = pos;
 628         mdie_len = res;
 629         pos += res;
 630
 631         /* Fast BSS Transition Information */
 632         if (auth_alg == WLAN_AUTH_FT) {
 633                 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
 634                 r0kh_id = sm->r0kh_id;
 635                 r0kh_id_len = sm->r0kh_id_len;
 636 #ifdef CONFIG_IEEE80211W
 637                 if (sm->mgmt_frame_prot) {
 638                         u8 *igtk;
 639                         size_t igtk_len;
 640                         u8 *nbuf;
 641                         igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
 642                         if (igtk == NULL) {
 643                                 os_free(subelem);
 644                                 return pos;
 645                         }
 646                         nbuf = os_realloc(subelem, subelem_len + igtk_len);
 647                         if (nbuf == NULL) {
 648                                 os_free(subelem);
 649                                 os_free(igtk);
 650                                 return pos;
 651                         }
 652                         subelem = nbuf;
 653                         os_memcpy(subelem + subelem_len, igtk, igtk_len);
 654                         subelem_len += igtk_len;
 655                         os_free(igtk);
 656                 }
 657 #endif /* CONFIG_IEEE80211W */
 658         } else {
 659                 r0kh_id = conf->r0_key_holder;
 660                 r0kh_id_len = conf->r0_key_holder_len;
 661         }
 662         res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, NULL, NULL, pos,
 663                              end - pos, subelem, subelem_len);
 664         os_free(subelem);
 665         if (res < 0)
 666                 return pos;
 667         ftie = pos;
 668         ftie_len = res;
 669         pos += res;
 670
 671         _ftie = (struct rsn_ftie *) (ftie + 2);
 672         _ftie->mic_control[1] = 3; /* Information element count */
 673
 674         ric_start = pos;
 675         if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
 676                 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
 677                 _ftie->mic_control[1] += ieee802_11_ie_count(ric_start,
 678                                                              pos - ric_start);
 679         }
 680         if (ric_start == pos)
 681                 ric_start = NULL;
 682
 683         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
 684                        mdie, mdie_len, ftie, ftie_len,
 685                        rsnie, rsnie_len,
 686                        ric_start, ric_start ? pos - ric_start : 0,
 687                        _ftie->mic) < 0)
 688                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
 689
 690         return pos;
 691 }
 692
 693
 694 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
 695                              struct wpa_ft_ies *parse)
 696 {
 697         const u8 *end, *pos;
 698
 699         parse->ftie = ie;
 700         parse->ftie_len = ie_len;
 701
 702         pos = ie + sizeof(struct rsn_ftie);
 703         end = ie + ie_len;
 704
 705         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 706                 switch (pos[0]) {
 707                 case FTIE_SUBELEM_R1KH_ID:
 708                         if (pos[1] != FT_R1KH_ID_LEN) {
 709                                 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
 710                                            "length in FTIE: %d", pos[1]);
 711                                 return -1;
 712                         }
 713                         parse->r1kh_id = pos + 2;
 714                         break;
 715                 case FTIE_SUBELEM_GTK:
 716                         parse->gtk = pos + 2;
 717                         parse->gtk_len = pos[1];
 718                         break;
 719                 case FTIE_SUBELEM_R0KH_ID:
 720                         if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
 721                                 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
 722                                            "length in FTIE: %d", pos[1]);
 723                                 return -1;
 724                         }
 725                         parse->r0kh_id = pos + 2;
 726                         parse->r0kh_id_len = pos[1];
 727                         break;
 728                 }
 729
 730                 pos += 2 + pos[1];
 731         }
 732
 733         return 0;
 734 }
 735
 736
 737 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
 738                             struct wpa_ft_ies *parse)
 739 {
 740         const u8 *end, *pos;
 741         struct wpa_ie_data data;
 742         int ret;
 743         const struct rsn_ftie *ftie;
 744         int prot_ie_count = 0;
 745
 746         os_memset(parse, 0, sizeof(*parse));
 747         if (ies == NULL)
 748                 return 0;
 749
 750         pos = ies;
 751         end = ies + ies_len;
 752         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 753                 switch (pos[0]) {
 754                 case WLAN_EID_RSN:
 755                         parse->rsn = pos + 2;
 756                         parse->rsn_len = pos[1];
 757                         ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
 758                                                    parse->rsn_len + 2,
 759                                                    &data);
 760                         if (ret < 0) {
 761                                 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
 762                                            "RSN IE: %d", ret);
 763                                 return -1;
 764                         }
 765                         if (data.num_pmkid == 1 && data.pmkid)
 766                                 parse->rsn_pmkid = data.pmkid;
 767                         break;
 768                 case WLAN_EID_MOBILITY_DOMAIN:
 769                         parse->mdie = pos + 2;
 770                         parse->mdie_len = pos[1];
 771                         break;
 772                 case WLAN_EID_FAST_BSS_TRANSITION:
 773                         if (pos[1] < sizeof(*ftie))
 774                                 return -1;
 775                         ftie = (const struct rsn_ftie *) (pos + 2);
 776                         prot_ie_count = ftie->mic_control[1];
 777                         if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
 778                                 return -1;
 779                         break;
 780                 case WLAN_EID_RIC_DATA:
 781                         if (parse->ric == NULL)
 782                                 parse->ric = pos;
 783                 }
 784
 785                 pos += 2 + pos[1];
 786         }
 787
 788         if (prot_ie_count == 0)
 789                 return 0; /* no MIC */
 790
 791         /*
 792          * Check that the protected IE count matches with IEs included in the
 793          * frame.
 794          */
 795         if (parse->rsn)
 796                 prot_ie_count--;
 797         if (parse->mdie)
 798                 prot_ie_count--;
 799         if (parse->ftie)
 800                 prot_ie_count--;
 801         if (prot_ie_count < 0) {
 802                 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
 803                            "the protected IE count");
 804                 return -1;
 805         }
 806
 807         if (prot_ie_count == 0 && parse->ric) {
 808                 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
 809                            "included in protected IE count");
 810                 return -1;
 811         }
 812
 813         /* Determine the end of the RIC IE(s) */
 814         pos = parse->ric;
 815         while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
 816                prot_ie_count) {
 817                 prot_ie_count--;
 818                 pos += 2 + pos[1];
 819         }
 820         parse->ric_len = pos - parse->ric;
 821         if (prot_ie_count) {
 822                 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
 823                            "frame", (int) prot_ie_count);
 824                 return -1;
 825         }
 826
 827         return 0;
 828 }
 829
 830
 831 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 832                                    int vlan_id,
 833                                    wpa_alg alg, const u8 *addr, int idx,
 834                                    u8 *key, size_t key_len)
 835 {
 836         if (wpa_auth->cb.set_key == NULL)
 837                 return -1;
 838         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 839                                     key, key_len);
 840 }
 841
 842
 843 static void wpa_ft_install_ptk(struct wpa_state_machine *sm)
 844 {
 845         wpa_alg alg;
 846         int klen;
 847
 848         /* MLME-SETKEYS.request(PTK) */
 849         if (sm->pairwise == WPA_CIPHER_TKIP) {
 850                 alg = WPA_ALG_TKIP;
 851                 klen = 32;
 852         } else if (sm->pairwise == WPA_CIPHER_CCMP) {
 853                 alg = WPA_ALG_CCMP;
 854                 klen = 16;
 855         } else
 856                 return;
 857
 858         /* FIX: add STA entry to kernel/driver here? The set_key will fail
 859          * most likely without this.. At the moment, STA entry is added only
 860          * after association has been completed. Alternatively, could
 861          * re-configure PTK at that point(?).
 862          */
 863         if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
 864                              sm->PTK.tk1, klen))
 865                 return;
 866
 867         /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
 868         sm->pairwise_set = TRUE;
 869 }
 870
 871
 872 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
 873                                    const u8 *ies, size_t ies_len,
 874                                    u8 **resp_ies, size_t *resp_ies_len)
 875 {
 876         struct rsn_mdie *mdie;
 877         struct rsn_ftie *ftie;
 878         u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
 879         u8 ptk_name[WPA_PMK_NAME_LEN];
 880         struct wpa_auth_config *conf;
 881         struct wpa_ft_ies parse;
 882         size_t buflen, ptk_len;
 883         int ret;
 884         u8 *pos, *end;
 885
 886         *resp_ies = NULL;
 887         *resp_ies_len = 0;
 888
 889         sm->pmk_r1_name_valid = 0;
 890         conf = &sm->wpa_auth->conf;
 891
 892         wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
 893                     ies, ies_len);
 894
 895         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
 896                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
 897                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 898         }
 899
 900         mdie = (struct rsn_mdie *) parse.mdie;
 901         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
 902             os_memcmp(mdie->mobility_domain,
 903                       sm->wpa_auth->conf.mobility_domain,
 904                       MOBILITY_DOMAIN_ID_LEN) != 0) {
 905                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
 906                 return WLAN_STATUS_INVALID_MDIE;
 907         }
 908
 909         ftie = (struct rsn_ftie *) parse.ftie;
 910         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
 911                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
 912                 return WLAN_STATUS_INVALID_FTIE;
 913         }
 914
 915         os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
 916
 917         if (parse.r0kh_id == NULL) {
 918                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
 919                 return WLAN_STATUS_INVALID_FTIE;
 920         }
 921
 922         wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
 923                     parse.r0kh_id, parse.r0kh_id_len);
 924         os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
 925         sm->r0kh_id_len = parse.r0kh_id_len;
 926
 927         if (parse.rsn_pmkid == NULL) {
 928                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
 929                 return WLAN_STATUS_INVALID_PMKID;
 930         }
 931
 932         wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
 933                     parse.rsn_pmkid, WPA_PMK_NAME_LEN);
 934         wpa_derive_pmk_r1_name(parse.rsn_pmkid,
 935                                sm->wpa_auth->conf.r1_key_holder, sm->addr,
 936                                pmk_r1_name);
 937         wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
 938                     pmk_r1_name, WPA_PMK_NAME_LEN);
 939
 940         if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1) <
 941             0) {
 942                 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
 943                                        sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
 944                         wpa_printf(MSG_DEBUG, "FT: Did not have matching "
 945                                    "PMK-R1 and unknown R0KH-ID");
 946                         return WLAN_STATUS_INVALID_PMKID;
 947                 }
 948
 949                 /*
 950                  * TODO: Should return "status pending" (and the caller should
 951                  * not send out response now). The real response will be sent
 952                  * once the response from R0KH is received.
 953                  */
 954                 return WLAN_STATUS_INVALID_PMKID;
 955         }
 956
 957         wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
 958         sm->pmk_r1_name_valid = 1;
 959         os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
 960
 961         if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
 962                 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
 963                            "ANonce");
 964                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 965         }
 966
 967         wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
 968                     sm->SNonce, WPA_NONCE_LEN);
 969         wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
 970                     sm->ANonce, WPA_NONCE_LEN);
 971
 972         ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
 973         wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
 974                           sm->wpa_auth->addr, pmk_r1_name,
 975                           (u8 *) &sm->PTK, ptk_len, ptk_name);
 976         wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
 977                         (u8 *) &sm->PTK, ptk_len);
 978         wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
 979
 980         wpa_ft_install_ptk(sm);
 981
 982         buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
 983                 2 + FT_R1KH_ID_LEN + 200;
 984         *resp_ies = os_zalloc(buflen);
 985         if (*resp_ies == NULL) {
 986                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 987         }
 988
 989         pos = *resp_ies;
 990         end = *resp_ies + buflen;
 991
 992         ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
 993         if (ret < 0) {
 994                 os_free(*resp_ies);
 995                 *resp_ies = NULL;
 996                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 997         }
 998         pos += ret;
 999
1000         ret = wpa_write_mdie(conf, pos, end - pos);
1001         if (ret < 0) {
1002                 os_free(*resp_ies);
1003                 *resp_ies = NULL;
1004                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1005         }
1006         pos += ret;
1007
1008         ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1009                              sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1010         if (ret < 0) {
1011                 os_free(*resp_ies);
1012                 *resp_ies = NULL;
1013                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1014         }
1015         pos += ret;
1016
1017         *resp_ies_len = pos - *resp_ies;
1018
1019         return WLAN_STATUS_SUCCESS;
1020 }
1021
1022
1023 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1024                          u16 auth_transaction, const u8 *ies, size_t ies_len,
1025                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1026                                     u16 auth_transaction, u16 status,
1027                                     const u8 *ies, size_t ies_len),
1028                          void *ctx)
1029 {
1030         u16 status;
1031         u8 *resp_ies;
1032         size_t resp_ies_len;
1033
1034         if (sm == NULL) {
1035                 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1036                            "WPA SM not available");
1037                 return;
1038         }
1039
1040         wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1041                    " BSSID=" MACSTR " transaction=%d",
1042                    MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1043         status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1044                                          &resp_ies_len);
1045
1046         wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1047                    " auth_transaction=%d status=%d",
1048                    MAC2STR(sm->addr), auth_transaction + 1, status);
1049         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1050         cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1051            resp_ies, resp_ies_len);
1052         os_free(resp_ies);
1053 }
1054
1055
1056 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1057                             size_t ies_len)
1058 {
1059         struct wpa_ft_ies parse;
1060         struct rsn_mdie *mdie;
1061         struct rsn_ftie *ftie;
1062         u8 mic[16];
1063
1064         if (sm == NULL)
1065                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1066
1067         wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1068
1069         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1070                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1071                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1072         }
1073
1074         if (parse.rsn == NULL) {
1075                 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1076                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1077         }
1078
1079         if (parse.rsn_pmkid == NULL) {
1080                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1081                 return WLAN_STATUS_INVALID_PMKID;
1082         }
1083
1084         if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1085         {
1086                 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1087                            "with the PMKR1Name derived from auth request");
1088                 return WLAN_STATUS_INVALID_PMKID;
1089         }
1090
1091         mdie = (struct rsn_mdie *) parse.mdie;
1092         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1093             os_memcmp(mdie->mobility_domain,
1094                       sm->wpa_auth->conf.mobility_domain,
1095                       MOBILITY_DOMAIN_ID_LEN) != 0) {
1096                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1097                 return WLAN_STATUS_INVALID_MDIE;
1098         }
1099
1100         ftie = (struct rsn_ftie *) parse.ftie;
1101         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1102                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1103                 return WLAN_STATUS_INVALID_FTIE;
1104         }
1105
1106         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1107                        parse.mdie - 2, parse.mdie_len + 2,
1108                        parse.ftie - 2, parse.ftie_len + 2,
1109                        parse.rsn - 2, parse.rsn_len + 2,
1110                        parse.ric, parse.ric_len,
1111                        mic) < 0) {
1112                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1113                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1114         }
1115
1116         if (os_memcmp(mic, ftie->mic, 16) != 0) {
1117                 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1118                 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1119                 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1120                 return WLAN_STATUS_INVALID_FTIE;
1121         }
1122
1123         return WLAN_STATUS_SUCCESS;
1124 }
1125
1126
1127 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1128 {
1129         const u8 *sta_addr, *target_ap;
1130         const u8 *ies;
1131         size_t ies_len;
1132         u8 action;
1133         struct ft_rrb_frame *frame;
1134
1135         if (sm == NULL)
1136                 return -1;
1137
1138         /*
1139          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1140          * FT Request action frame body[variable]
1141          */
1142
1143         if (len < 14) {
1144                 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1145                            "(len=%lu)", (unsigned long) len);
1146                 return -1;
1147         }
1148
1149         action = data[1];
1150         sta_addr = data + 2;
1151         target_ap = data + 8;
1152         ies = data + 14;
1153         ies_len = len - 14;
1154
1155         wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1156                    " Target AP=" MACSTR " Action=%d)",
1157                    MAC2STR(sta_addr), MAC2STR(target_ap), action);
1158
1159         if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1160                 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1161                            "STA=" MACSTR " STA-Address=" MACSTR,
1162                            MAC2STR(sm->addr), MAC2STR(sta_addr));
1163                 return -1;
1164         }
1165
1166         /*
1167          * Do some sanity checking on the target AP address (not own and not
1168          * broadcast. This could be extended to filter based on a list of known
1169          * APs in the MD (if such a list were configured).
1170          */
1171         if ((target_ap[0] & 0x01) ||
1172             os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1173                 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1174                            "frame");
1175                 return -1;
1176         }
1177
1178         wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1179
1180         /* RRB - Forward action frame to the target AP */
1181         frame = os_malloc(sizeof(*frame) + len);
1182         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1183         frame->packet_type = FT_PACKET_REQUEST;
1184         frame->action_length = host_to_le16(len);
1185         os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1186         os_memcpy(frame + 1, data, len);
1187
1188         wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1189                         sizeof(*frame) + len);
1190         os_free(frame);
1191
1192         return 0;
1193 }
1194
1195
1196 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1197                                  const u8 *current_ap, const u8 *sta_addr,
1198                                  const u8 *body, size_t len)
1199 {
1200         struct wpa_state_machine *sm;
1201         u16 status;
1202         u8 *resp_ies, *pos;
1203         size_t resp_ies_len, rlen;
1204         struct ft_rrb_frame *frame;
1205
1206         sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1207         if (sm == NULL) {
1208                 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1209                            "RRB Request");
1210                 return -1;
1211         }
1212
1213         wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1214
1215         status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1216                                          &resp_ies_len);
1217
1218         wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1219                    " CurrentAP=" MACSTR " status=%d",
1220                    MAC2STR(sm->addr), MAC2STR(current_ap), status);
1221         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1222
1223         /* RRB - Forward action frame response to the Current AP */
1224
1225         /*
1226          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1227          * Status_Code[2] FT Request action frame body[variable]
1228          */
1229         rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1230
1231         frame = os_malloc(sizeof(*frame) + rlen);
1232         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1233         frame->packet_type = FT_PACKET_RESPONSE;
1234         frame->action_length = host_to_le16(rlen);
1235         os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1236         pos = (u8 *) (frame + 1);
1237         *pos++ = WLAN_ACTION_FT;
1238         *pos++ = 2; /* Action: Response */
1239         os_memcpy(pos, sta_addr, ETH_ALEN);
1240         pos += ETH_ALEN;
1241         os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1242         pos += ETH_ALEN;
1243         WPA_PUT_LE16(pos, status);
1244         pos += 2;
1245         if (resp_ies) {
1246                 os_memcpy(pos, resp_ies, resp_ies_len);
1247                 os_free(resp_ies);
1248         }
1249
1250         wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1251                         sizeof(*frame) + rlen);
1252         os_free(frame);
1253
1254         return 0;
1255 }
1256
1257
1258 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1259                               const u8 *src_addr,
1260                               const u8 *data, size_t data_len)
1261 {
1262         struct ft_r0kh_r1kh_pull_frame *frame, f;
1263         struct ft_remote_r1kh *r1kh;
1264         struct ft_r0kh_r1kh_resp_frame resp, r;
1265         u8 pmk_r0[PMK_LEN];
1266
1267         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1268
1269         if (data_len < sizeof(*frame))
1270                 return -1;
1271
1272         r1kh = wpa_auth->conf.r1kh_list;
1273         while (r1kh) {
1274                 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1275                         break;
1276                 r1kh = r1kh->next;
1277         }
1278         if (r1kh == NULL) {
1279                 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1280                            "PMK-R1 pull source address " MACSTR,
1281                            MAC2STR(src_addr));
1282                 return -1;
1283         }
1284
1285         frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1286         /* aes_unwrap() does not support inplace decryption, so use a temporary
1287          * buffer for the data. */
1288         if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1289                        frame->nonce, f.nonce) < 0) {
1290                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1291                            "request from " MACSTR, MAC2STR(src_addr));
1292                 return -1;
1293         }
1294
1295         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1296                     f.nonce, sizeof(f.nonce));
1297         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1298                     f.pmk_r0_name, WPA_PMK_NAME_LEN);
1299         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1300                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1301
1302         os_memset(&resp, 0, sizeof(resp));
1303         resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1304         resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1305         resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1306         os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1307
1308         /* aes_wrap() does not support inplace encryption, so use a temporary
1309          * buffer for the data. */
1310         os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1311         os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1312         os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1313         if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0) <
1314             0) {
1315                 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1316                            "PMK-R1 pull");
1317                 return -1;
1318         }
1319
1320         wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1321                           r.pmk_r1, r.pmk_r1_name);
1322         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1323         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1324                     WPA_PMK_NAME_LEN);
1325
1326         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1327                      r.nonce, resp.nonce) < 0) {
1328                 os_memset(pmk_r0, 0, PMK_LEN);
1329                 return -1;
1330         }
1331
1332         os_memset(pmk_r0, 0, PMK_LEN);
1333
1334         wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1335
1336         return 0;
1337 }
1338
1339
1340 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1341                               const u8 *src_addr,
1342                               const u8 *data, size_t data_len)
1343 {
1344         struct ft_r0kh_r1kh_resp_frame *frame, f;
1345         struct ft_remote_r0kh *r0kh;
1346
1347         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1348
1349         if (data_len < sizeof(*frame))
1350                 return -1;
1351
1352         r0kh = wpa_auth->conf.r0kh_list;
1353         while (r0kh) {
1354                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1355                         break;
1356                 r0kh = r0kh->next;
1357         }
1358         if (r0kh == NULL) {
1359                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1360                            "PMK-R0 pull response source address " MACSTR,
1361                            MAC2STR(src_addr));
1362                 return -1;
1363         }
1364
1365         frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1366         /* aes_unwrap() does not support inplace decryption, so use a temporary
1367          * buffer for the data. */
1368         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1369                        frame->nonce, f.nonce) < 0) {
1370                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1371                            "response from " MACSTR, MAC2STR(src_addr));
1372                 return -1;
1373         }
1374
1375         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1376             != 0) {
1377                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1378                            "matching R1KH-ID");
1379                 return -1;
1380         }
1381
1382         /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1383          * and call this requests callback function to finish request
1384          * processing */
1385
1386         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1387                     f.nonce, sizeof(f.nonce));
1388         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1389                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1390         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1391                         f.pmk_r1, PMK_LEN);
1392         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1393                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1394
1395         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name);
1396         os_memset(f.pmk_r1, 0, PMK_LEN);
1397
1398         return 0;
1399 }
1400
1401
1402 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1403                               const u8 *src_addr,
1404                               const u8 *data, size_t data_len)
1405 {
1406         struct ft_r0kh_r1kh_push_frame *frame, f;
1407         struct ft_remote_r0kh *r0kh;
1408         struct os_time now;
1409         os_time_t tsend;
1410
1411         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1412
1413         if (data_len < sizeof(*frame))
1414                 return -1;
1415
1416         r0kh = wpa_auth->conf.r0kh_list;
1417         while (r0kh) {
1418                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1419                         break;
1420                 r0kh = r0kh->next;
1421         }
1422         if (r0kh == NULL) {
1423                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1424                            "PMK-R0 push source address " MACSTR,
1425                            MAC2STR(src_addr));
1426                 return -1;
1427         }
1428
1429         frame = (struct ft_r0kh_r1kh_push_frame *) data;
1430         /* aes_unwrap() does not support inplace decryption, so use a temporary
1431          * buffer for the data. */
1432         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1433                        frame->timestamp, f.timestamp) < 0) {
1434                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1435                            MACSTR, MAC2STR(src_addr));
1436                 return -1;
1437         }
1438
1439         os_get_time(&now);
1440         tsend = WPA_GET_LE32(f.timestamp);
1441         if ((now.sec > tsend && now.sec - tsend > 60) ||
1442             (now.sec < tsend && tsend - now.sec > 60)) {
1443                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1444                            "timestamp: sender time %d own time %d\n",
1445                            (int) tsend, (int) now.sec);
1446                 return -1;
1447         }
1448
1449         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1450             != 0) {
1451                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1452                            "R1KH-ID (received " MACSTR " own " MACSTR ")",
1453                            MAC2STR(f.r1kh_id),
1454                            MAC2STR(wpa_auth->conf.r1_key_holder));
1455                 return -1;
1456         }
1457
1458         wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1459                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1460         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1461                         f.pmk_r1, PMK_LEN);
1462         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1463                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1464
1465         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name);
1466         os_memset(f.pmk_r1, 0, PMK_LEN);
1467
1468         return 0;
1469 }
1470
1471
1472 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1473                   const u8 *data, size_t data_len)
1474 {
1475         struct ft_rrb_frame *frame;
1476         u16 alen;
1477         const u8 *pos, *end, *start;
1478         u8 action;
1479         const u8 *sta_addr, *target_ap_addr;
1480
1481         wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1482                    MAC2STR(src_addr));
1483
1484         if (data_len < sizeof(*frame)) {
1485                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1486                            (unsigned long) data_len);
1487                 return -1;
1488         }
1489
1490         pos = data;
1491         frame = (struct ft_rrb_frame *) pos;
1492         pos += sizeof(*frame);
1493
1494         alen = le_to_host16(frame->action_length);
1495         wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1496                    "action_length=%d ap_address=" MACSTR,
1497                    frame->frame_type, frame->packet_type, alen,
1498                    MAC2STR(frame->ap_address));
1499
1500         if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1501                 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1502                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1503                            "unrecognized type %d", frame->frame_type);
1504                 return -1;
1505         }
1506
1507         if (alen > data_len - sizeof(*frame)) {
1508                 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1509                            "frame");
1510                 return -1;
1511         }
1512
1513         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1514                 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1515         if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1516                 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1517         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1518                 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1519
1520         wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1521
1522         if (alen < 1 + 1 + 2 * ETH_ALEN) {
1523                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1524                            "room for Action Frame body); alen=%lu",
1525                            (unsigned long) alen);
1526                 return -1;
1527         }
1528         start = pos;
1529         end = pos + alen;
1530
1531         if (*pos != WLAN_ACTION_FT) {
1532                 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1533                            "%d", *pos);
1534                 return -1;
1535         }
1536
1537         pos++;
1538         action = *pos++;
1539         sta_addr = pos;
1540         pos += ETH_ALEN;
1541         target_ap_addr = pos;
1542         pos += ETH_ALEN;
1543         wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1544                    MACSTR " target_ap_addr=" MACSTR,
1545                    action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1546
1547         if (frame->packet_type == FT_PACKET_REQUEST) {
1548                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1549
1550                 if (action != 1) {
1551                         wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1552                                    "RRB Request", action);
1553                         return -1;
1554                 }
1555
1556                 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1557                         wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1558                                    "RRB Request does not match with own "
1559                                    "address");
1560                         return -1;
1561                 }
1562
1563                 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1564                                           sta_addr, pos, end - pos) < 0)
1565                         return -1;
1566         } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1567                 u16 status_code;
1568
1569                 if (end - pos < 2) {
1570                         wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1571                                    "code in RRB Response");
1572                         return -1;
1573                 }
1574                 status_code = WPA_GET_LE16(pos);
1575                 pos += 2;
1576
1577                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1578                            "(status_code=%d)", status_code);
1579
1580                 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1581                         return -1;
1582         } else {
1583                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1584                            "packet_type %d", frame->packet_type);
1585                 return -1;
1586         }
1587
1588         return 0;
1589 }
1590
1591
1592 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1593                                    struct wpa_ft_pmk_r0_sa *pmk_r0,
1594                                    struct ft_remote_r1kh *r1kh,
1595                                    const u8 *s1kh_id)
1596 {
1597         struct ft_r0kh_r1kh_push_frame frame, f;
1598         struct os_time now;
1599
1600         os_memset(&frame, 0, sizeof(frame));
1601         frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1602         frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1603         frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1604         os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1605
1606         /* aes_wrap() does not support inplace encryption, so use a temporary
1607          * buffer for the data. */
1608         os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1609         os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1610         os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1611         wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1612                           s1kh_id, f.pmk_r1, f.pmk_r1_name);
1613         wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1614         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1615         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1616                     WPA_PMK_NAME_LEN);
1617         os_get_time(&now);
1618         WPA_PUT_LE32(f.timestamp, now.sec);
1619         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1620                      f.timestamp, frame.timestamp) < 0)
1621                 return;
1622
1623         wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1624 }
1625
1626
1627 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1628 {
1629         struct wpa_ft_pmk_r0_sa *r0;
1630         struct ft_remote_r1kh *r1kh;
1631
1632         if (!wpa_auth->conf.pmk_r1_push)
1633                 return;
1634
1635         r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1636         while (r0) {
1637                 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1638                         break;
1639                 r0 = r0->next;
1640         }
1641
1642         if (r0 == NULL || r0->pmk_r1_pushed)
1643                 return;
1644         r0->pmk_r1_pushed = 1;
1645
1646         wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1647                    "for STA " MACSTR, MAC2STR(addr));
1648
1649         r1kh = wpa_auth->conf.r1kh_list;
1650         while (r1kh) {
1651                 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
1652                 r1kh = r1kh->next;
1653         }
1654 }
1655
1656 #endif /* CONFIG_IEEE80211R */