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 #ifdef CONFIG_IEEE80211W
 397 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
 398                                            const u8 *addr, int idx, u8 *seq)
 399 {
 400         if (wpa_auth->cb.get_seqnum_igtk == NULL)
 401                 return -1;
 402         return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
 403 }
 404 #endif /* CONFIG_IEEE80211W */
 405
 406
 407 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
 408 {
 409         u8 *subelem;
 410         struct wpa_group *gsm = sm->group;
 411         size_t subelem_len, pad_len;
 412         const u8 *key;
 413         size_t key_len;
 414         u8 keybuf[32];
 415
 416         key_len = gsm->GTK_len;
 417         if (key_len > sizeof(keybuf))
 418                 return NULL;
 419
 420         /*
 421          * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
 422          * than 16 bytes.
 423          */
 424         pad_len = key_len % 8;
 425         if (pad_len)
 426                 pad_len = 8 - pad_len;
 427         if (key_len + pad_len < 16)
 428                 pad_len += 8;
 429         if (pad_len) {
 430                 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
 431                 os_memset(keybuf + key_len, 0, pad_len);
 432                 keybuf[key_len] = 0xdd;
 433                 key_len += pad_len;
 434                 key = keybuf;
 435         } else
 436                 key = gsm->GTK[gsm->GN - 1];
 437
 438         /*
 439          * Sub-elem ID[1] | Length[1] | Key Info[1] | Key Length[1] | RSC[8] |
 440          * Key[5..32].
 441          */
 442         subelem_len = 12 + key_len + 8;
 443         subelem = os_zalloc(subelem_len);
 444         if (subelem == NULL)
 445                 return NULL;
 446
 447         subelem[0] = FTIE_SUBELEM_GTK;
 448         subelem[1] = 10 + key_len + 8;
 449         subelem[2] = gsm->GN & 0x03; /* Key ID in B0-B1 of Key Info */
 450         subelem[3] = gsm->GTK_len;
 451         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 4);
 452         if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 12)) {
 453                 os_free(subelem);
 454                 return NULL;
 455         }
 456
 457         *len = subelem_len;
 458         return subelem;
 459 }
 460
 461
 462 #ifdef CONFIG_IEEE80211W
 463 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
 464 {
 465         u8 *subelem, *pos;
 466         struct wpa_group *gsm = sm->group;
 467         size_t subelem_len;
 468
 469         /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
 470          * Key[16+8] */
 471         subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
 472         subelem = os_zalloc(subelem_len);
 473         if (subelem == NULL)
 474                 return NULL;
 475
 476         pos = subelem;
 477         *pos++ = FTIE_SUBELEM_IGTK;
 478         *pos++ = subelem_len - 2;
 479         WPA_PUT_LE16(pos, gsm->GN_igtk);
 480         pos += 2;
 481         wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
 482         pos += 6;
 483         *pos++ = WPA_IGTK_LEN;
 484         if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
 485                      gsm->IGTK[gsm->GN_igtk - 4], pos)) {
 486                 os_free(subelem);
 487                 return NULL;
 488         }
 489
 490         *len = subelem_len;
 491         return subelem;
 492 }
 493 #endif /* CONFIG_IEEE80211W */
 494
 495
 496 static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
 497                                 const u8 *ies, size_t ies_len)
 498 {
 499         struct ieee802_11_elems parse;
 500         struct rsn_rdie *rdie;
 501
 502         wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
 503                    id, descr_count);
 504         wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
 505                     ies, ies_len);
 506
 507         if (end - pos < (int) sizeof(*rdie)) {
 508                 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
 509                 return pos;
 510         }
 511
 512         *pos++ = WLAN_EID_RIC_DATA;
 513         *pos++ = sizeof(*rdie);
 514         rdie = (struct rsn_rdie *) pos;
 515         rdie->id = id;
 516         rdie->descr_count = 0;
 517         rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
 518         pos += sizeof(*rdie);
 519
 520         if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
 521             ParseFailed) {
 522                 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
 523                 rdie->status_code =
 524                         host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 525                 return pos;
 526         }
 527
 528 #ifdef NEED_AP_MLME
 529         if (parse.wmm_tspec) {
 530                 struct wmm_tspec_element *tspec;
 531                 int res;
 532
 533                 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
 534                         wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
 535                                    "(%d)", (int) parse.wmm_tspec_len);
 536                         rdie->status_code =
 537                                 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 538                         return pos;
 539                 }
 540                 if (end - pos < (int) sizeof(*tspec)) {
 541                         wpa_printf(MSG_ERROR, "FT: Not enough room for "
 542                                    "response TSPEC");
 543                         rdie->status_code =
 544                                 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 545                         return pos;
 546                 }
 547                 tspec = (struct wmm_tspec_element *) pos;
 548                 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
 549                 res = wmm_process_tspec(tspec);
 550                 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
 551                 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
 552                         rdie->status_code =
 553                                 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
 554                 else if (res == WMM_ADDTS_STATUS_REFUSED)
 555                         rdie->status_code =
 556                                 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
 557                 else {
 558                         /* TSPEC accepted; include updated TSPEC in response */
 559                         rdie->descr_count = 1;
 560                         pos += sizeof(*tspec);
 561                 }
 562                 return pos;
 563         }
 564 #endif /* NEED_AP_MLME */
 565
 566         wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
 567         rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 568         return pos;
 569 }
 570
 571
 572 static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
 573 {
 574         const u8 *rpos, *start;
 575         const struct rsn_rdie *rdie;
 576
 577         wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
 578
 579         rpos = ric;
 580         while (rpos + sizeof(*rdie) < ric + ric_len) {
 581                 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
 582                     rpos + 2 + rpos[1] > ric + ric_len)
 583                         break;
 584                 rdie = (const struct rsn_rdie *) (rpos + 2);
 585                 rpos += 2 + rpos[1];
 586                 start = rpos;
 587
 588                 while (rpos + 2 <= ric + ric_len &&
 589                        rpos + 2 + rpos[1] <= ric + ric_len) {
 590                         if (rpos[0] == WLAN_EID_RIC_DATA)
 591                                 break;
 592                         rpos += 2 + rpos[1];
 593                 }
 594                 pos = wpa_ft_process_rdie(pos, end, rdie->id,
 595                                           rdie->descr_count,
 596                                           start, rpos - start);
 597         }
 598
 599         return pos;
 600 }
 601
 602
 603 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
 604                                  size_t max_len, int auth_alg,
 605                                  const u8 *req_ies, size_t req_ies_len)
 606 {
 607         u8 *end, *mdie, *ftie, *rsnie, *r0kh_id, *subelem = NULL;
 608         size_t mdie_len, ftie_len, rsnie_len, r0kh_id_len, subelem_len = 0;
 609         int res;
 610         struct wpa_auth_config *conf;
 611         struct rsn_ftie *_ftie;
 612         struct wpa_ft_ies parse;
 613         u8 *ric_start;
 614
 615         if (sm == NULL)
 616                 return pos;
 617
 618         conf = &sm->wpa_auth->conf;
 619
 620         if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
 621             sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
 622                 return pos;
 623
 624         end = pos + max_len;
 625
 626         /* RSN */
 627         res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
 628         if (res < 0)
 629                 return pos;
 630         rsnie = pos;
 631         rsnie_len = res;
 632         pos += res;
 633
 634         /* Mobility Domain Information */
 635         res = wpa_write_mdie(conf, pos, end - pos);
 636         if (res < 0)
 637                 return pos;
 638         mdie = pos;
 639         mdie_len = res;
 640         pos += res;
 641
 642         /* Fast BSS Transition Information */
 643         if (auth_alg == WLAN_AUTH_FT) {
 644                 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
 645                 r0kh_id = sm->r0kh_id;
 646                 r0kh_id_len = sm->r0kh_id_len;
 647 #ifdef CONFIG_IEEE80211W
 648                 if (sm->mgmt_frame_prot) {
 649                         u8 *igtk;
 650                         size_t igtk_len;
 651                         u8 *nbuf;
 652                         igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
 653                         if (igtk == NULL) {
 654                                 os_free(subelem);
 655                                 return pos;
 656                         }
 657                         nbuf = os_realloc(subelem, subelem_len + igtk_len);
 658                         if (nbuf == NULL) {
 659                                 os_free(subelem);
 660                                 os_free(igtk);
 661                                 return pos;
 662                         }
 663                         subelem = nbuf;
 664                         os_memcpy(subelem + subelem_len, igtk, igtk_len);
 665                         subelem_len += igtk_len;
 666                         os_free(igtk);
 667                 }
 668 #endif /* CONFIG_IEEE80211W */
 669         } else {
 670                 r0kh_id = conf->r0_key_holder;
 671                 r0kh_id_len = conf->r0_key_holder_len;
 672         }
 673         res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, NULL, NULL, pos,
 674                              end - pos, subelem, subelem_len);
 675         os_free(subelem);
 676         if (res < 0)
 677                 return pos;
 678         ftie = pos;
 679         ftie_len = res;
 680         pos += res;
 681
 682         _ftie = (struct rsn_ftie *) (ftie + 2);
 683         _ftie->mic_control[1] = 3; /* Information element count */
 684
 685         ric_start = pos;
 686         if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
 687                 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
 688                 _ftie->mic_control[1] += ieee802_11_ie_count(ric_start,
 689                                                              pos - ric_start);
 690         }
 691         if (ric_start == pos)
 692                 ric_start = NULL;
 693
 694         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
 695                        mdie, mdie_len, ftie, ftie_len,
 696                        rsnie, rsnie_len,
 697                        ric_start, ric_start ? pos - ric_start : 0,
 698                        _ftie->mic) < 0)
 699                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
 700
 701         return pos;
 702 }
 703
 704
 705 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
 706                              struct wpa_ft_ies *parse)
 707 {
 708         const u8 *end, *pos;
 709
 710         parse->ftie = ie;
 711         parse->ftie_len = ie_len;
 712
 713         pos = ie + sizeof(struct rsn_ftie);
 714         end = ie + ie_len;
 715
 716         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 717                 switch (pos[0]) {
 718                 case FTIE_SUBELEM_R1KH_ID:
 719                         if (pos[1] != FT_R1KH_ID_LEN) {
 720                                 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
 721                                            "length in FTIE: %d", pos[1]);
 722                                 return -1;
 723                         }
 724                         parse->r1kh_id = pos + 2;
 725                         break;
 726                 case FTIE_SUBELEM_GTK:
 727                         parse->gtk = pos + 2;
 728                         parse->gtk_len = pos[1];
 729                         break;
 730                 case FTIE_SUBELEM_R0KH_ID:
 731                         if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
 732                                 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
 733                                            "length in FTIE: %d", pos[1]);
 734                                 return -1;
 735                         }
 736                         parse->r0kh_id = pos + 2;
 737                         parse->r0kh_id_len = pos[1];
 738                         break;
 739                 }
 740
 741                 pos += 2 + pos[1];
 742         }
 743
 744         return 0;
 745 }
 746
 747
 748 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
 749                             struct wpa_ft_ies *parse)
 750 {
 751         const u8 *end, *pos;
 752         struct wpa_ie_data data;
 753         int ret;
 754         const struct rsn_ftie *ftie;
 755         int prot_ie_count = 0;
 756
 757         os_memset(parse, 0, sizeof(*parse));
 758         if (ies == NULL)
 759                 return 0;
 760
 761         pos = ies;
 762         end = ies + ies_len;
 763         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 764                 switch (pos[0]) {
 765                 case WLAN_EID_RSN:
 766                         parse->rsn = pos + 2;
 767                         parse->rsn_len = pos[1];
 768                         ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
 769                                                    parse->rsn_len + 2,
 770                                                    &data);
 771                         if (ret < 0) {
 772                                 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
 773                                            "RSN IE: %d", ret);
 774                                 return -1;
 775                         }
 776                         if (data.num_pmkid == 1 && data.pmkid)
 777                                 parse->rsn_pmkid = data.pmkid;
 778                         break;
 779                 case WLAN_EID_MOBILITY_DOMAIN:
 780                         parse->mdie = pos + 2;
 781                         parse->mdie_len = pos[1];
 782                         break;
 783                 case WLAN_EID_FAST_BSS_TRANSITION:
 784                         if (pos[1] < sizeof(*ftie))
 785                                 return -1;
 786                         ftie = (const struct rsn_ftie *) (pos + 2);
 787                         prot_ie_count = ftie->mic_control[1];
 788                         if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
 789                                 return -1;
 790                         break;
 791                 case WLAN_EID_RIC_DATA:
 792                         if (parse->ric == NULL)
 793                                 parse->ric = pos;
 794                 }
 795
 796                 pos += 2 + pos[1];
 797         }
 798
 799         if (prot_ie_count == 0)
 800                 return 0; /* no MIC */
 801
 802         /*
 803          * Check that the protected IE count matches with IEs included in the
 804          * frame.
 805          */
 806         if (parse->rsn)
 807                 prot_ie_count--;
 808         if (parse->mdie)
 809                 prot_ie_count--;
 810         if (parse->ftie)
 811                 prot_ie_count--;
 812         if (prot_ie_count < 0) {
 813                 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
 814                            "the protected IE count");
 815                 return -1;
 816         }
 817
 818         if (prot_ie_count == 0 && parse->ric) {
 819                 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
 820                            "included in protected IE count");
 821                 return -1;
 822         }
 823
 824         /* Determine the end of the RIC IE(s) */
 825         pos = parse->ric;
 826         while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
 827                prot_ie_count) {
 828                 prot_ie_count--;
 829                 pos += 2 + pos[1];
 830         }
 831         parse->ric_len = pos - parse->ric;
 832         if (prot_ie_count) {
 833                 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
 834                            "frame", (int) prot_ie_count);
 835                 return -1;
 836         }
 837
 838         return 0;
 839 }
 840
 841
 842 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 843                                    int vlan_id,
 844                                    wpa_alg alg, const u8 *addr, int idx,
 845                                    u8 *key, size_t key_len)
 846 {
 847         if (wpa_auth->cb.set_key == NULL)
 848                 return -1;
 849         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 850                                     key, key_len);
 851 }
 852
 853
 854 static void wpa_ft_install_ptk(struct wpa_state_machine *sm)
 855 {
 856         wpa_alg alg;
 857         int klen;
 858
 859         /* MLME-SETKEYS.request(PTK) */
 860         if (sm->pairwise == WPA_CIPHER_TKIP) {
 861                 alg = WPA_ALG_TKIP;
 862                 klen = 32;
 863         } else if (sm->pairwise == WPA_CIPHER_CCMP) {
 864                 alg = WPA_ALG_CCMP;
 865                 klen = 16;
 866         } else
 867                 return;
 868
 869         /* FIX: add STA entry to kernel/driver here? The set_key will fail
 870          * most likely without this.. At the moment, STA entry is added only
 871          * after association has been completed. Alternatively, could
 872          * re-configure PTK at that point(?).
 873          */
 874         if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
 875                              sm->PTK.tk1, klen))
 876                 return;
 877
 878         /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
 879         sm->pairwise_set = TRUE;
 880 }
 881
 882
 883 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
 884                                    const u8 *ies, size_t ies_len,
 885                                    u8 **resp_ies, size_t *resp_ies_len)
 886 {
 887         struct rsn_mdie *mdie;
 888         struct rsn_ftie *ftie;
 889         u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
 890         u8 ptk_name[WPA_PMK_NAME_LEN];
 891         struct wpa_auth_config *conf;
 892         struct wpa_ft_ies parse;
 893         size_t buflen, ptk_len;
 894         int ret;
 895         u8 *pos, *end;
 896
 897         *resp_ies = NULL;
 898         *resp_ies_len = 0;
 899
 900         sm->pmk_r1_name_valid = 0;
 901         conf = &sm->wpa_auth->conf;
 902
 903         wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
 904                     ies, ies_len);
 905
 906         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
 907                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
 908                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 909         }
 910
 911         mdie = (struct rsn_mdie *) parse.mdie;
 912         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
 913             os_memcmp(mdie->mobility_domain,
 914                       sm->wpa_auth->conf.mobility_domain,
 915                       MOBILITY_DOMAIN_ID_LEN) != 0) {
 916                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
 917                 return WLAN_STATUS_INVALID_MDIE;
 918         }
 919
 920         ftie = (struct rsn_ftie *) parse.ftie;
 921         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
 922                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
 923                 return WLAN_STATUS_INVALID_FTIE;
 924         }
 925
 926         os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
 927
 928         if (parse.r0kh_id == NULL) {
 929                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
 930                 return WLAN_STATUS_INVALID_FTIE;
 931         }
 932
 933         wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
 934                     parse.r0kh_id, parse.r0kh_id_len);
 935         os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
 936         sm->r0kh_id_len = parse.r0kh_id_len;
 937
 938         if (parse.rsn_pmkid == NULL) {
 939                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
 940                 return WLAN_STATUS_INVALID_PMKID;
 941         }
 942
 943         wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
 944                     parse.rsn_pmkid, WPA_PMK_NAME_LEN);
 945         wpa_derive_pmk_r1_name(parse.rsn_pmkid,
 946                                sm->wpa_auth->conf.r1_key_holder, sm->addr,
 947                                pmk_r1_name);
 948         wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
 949                     pmk_r1_name, WPA_PMK_NAME_LEN);
 950
 951         if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1) <
 952             0) {
 953                 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
 954                                        sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
 955                         wpa_printf(MSG_DEBUG, "FT: Did not have matching "
 956                                    "PMK-R1 and unknown R0KH-ID");
 957                         return WLAN_STATUS_INVALID_PMKID;
 958                 }
 959
 960                 /*
 961                  * TODO: Should return "status pending" (and the caller should
 962                  * not send out response now). The real response will be sent
 963                  * once the response from R0KH is received.
 964                  */
 965                 return WLAN_STATUS_INVALID_PMKID;
 966         }
 967
 968         wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
 969         sm->pmk_r1_name_valid = 1;
 970         os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
 971
 972         if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
 973                 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
 974                            "ANonce");
 975                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 976         }
 977
 978         wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
 979                     sm->SNonce, WPA_NONCE_LEN);
 980         wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
 981                     sm->ANonce, WPA_NONCE_LEN);
 982
 983         ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
 984         wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
 985                           sm->wpa_auth->addr, pmk_r1_name,
 986                           (u8 *) &sm->PTK, ptk_len, ptk_name);
 987         wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
 988                         (u8 *) &sm->PTK, ptk_len);
 989         wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
 990
 991         wpa_ft_install_ptk(sm);
 992
 993         buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
 994                 2 + FT_R1KH_ID_LEN + 200;
 995         *resp_ies = os_zalloc(buflen);
 996         if (*resp_ies == NULL) {
 997                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 998         }
 999
1000         pos = *resp_ies;
1001         end = *resp_ies + buflen;
1002
1003         ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1004         if (ret < 0) {
1005                 os_free(*resp_ies);
1006                 *resp_ies = NULL;
1007                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1008         }
1009         pos += ret;
1010
1011         ret = wpa_write_mdie(conf, pos, end - pos);
1012         if (ret < 0) {
1013                 os_free(*resp_ies);
1014                 *resp_ies = NULL;
1015                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1016         }
1017         pos += ret;
1018
1019         ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1020                              sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1021         if (ret < 0) {
1022                 os_free(*resp_ies);
1023                 *resp_ies = NULL;
1024                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1025         }
1026         pos += ret;
1027
1028         *resp_ies_len = pos - *resp_ies;
1029
1030         return WLAN_STATUS_SUCCESS;
1031 }
1032
1033
1034 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1035                          u16 auth_transaction, const u8 *ies, size_t ies_len,
1036                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1037                                     u16 auth_transaction, u16 status,
1038                                     const u8 *ies, size_t ies_len),
1039                          void *ctx)
1040 {
1041         u16 status;
1042         u8 *resp_ies;
1043         size_t resp_ies_len;
1044
1045         if (sm == NULL) {
1046                 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1047                            "WPA SM not available");
1048                 return;
1049         }
1050
1051         wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1052                    " BSSID=" MACSTR " transaction=%d",
1053                    MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1054         status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1055                                          &resp_ies_len);
1056
1057         wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1058                    " auth_transaction=%d status=%d",
1059                    MAC2STR(sm->addr), auth_transaction + 1, status);
1060         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1061         cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1062            resp_ies, resp_ies_len);
1063         os_free(resp_ies);
1064 }
1065
1066
1067 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1068                             size_t ies_len)
1069 {
1070         struct wpa_ft_ies parse;
1071         struct rsn_mdie *mdie;
1072         struct rsn_ftie *ftie;
1073         u8 mic[16];
1074
1075         if (sm == NULL)
1076                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1077
1078         wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1079
1080         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1081                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1082                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1083         }
1084
1085         if (parse.rsn == NULL) {
1086                 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1087                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1088         }
1089
1090         if (parse.rsn_pmkid == NULL) {
1091                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1092                 return WLAN_STATUS_INVALID_PMKID;
1093         }
1094
1095         if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1096         {
1097                 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1098                            "with the PMKR1Name derived from auth request");
1099                 return WLAN_STATUS_INVALID_PMKID;
1100         }
1101
1102         mdie = (struct rsn_mdie *) parse.mdie;
1103         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1104             os_memcmp(mdie->mobility_domain,
1105                       sm->wpa_auth->conf.mobility_domain,
1106                       MOBILITY_DOMAIN_ID_LEN) != 0) {
1107                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1108                 return WLAN_STATUS_INVALID_MDIE;
1109         }
1110
1111         ftie = (struct rsn_ftie *) parse.ftie;
1112         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1113                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1114                 return WLAN_STATUS_INVALID_FTIE;
1115         }
1116
1117         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1118                        parse.mdie - 2, parse.mdie_len + 2,
1119                        parse.ftie - 2, parse.ftie_len + 2,
1120                        parse.rsn - 2, parse.rsn_len + 2,
1121                        parse.ric, parse.ric_len,
1122                        mic) < 0) {
1123                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1124                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1125         }
1126
1127         if (os_memcmp(mic, ftie->mic, 16) != 0) {
1128                 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1129                 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1130                 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1131                 return WLAN_STATUS_INVALID_FTIE;
1132         }
1133
1134         return WLAN_STATUS_SUCCESS;
1135 }
1136
1137
1138 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1139 {
1140         const u8 *sta_addr, *target_ap;
1141         const u8 *ies;
1142         size_t ies_len;
1143         u8 action;
1144         struct ft_rrb_frame *frame;
1145
1146         if (sm == NULL)
1147                 return -1;
1148
1149         /*
1150          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1151          * FT Request action frame body[variable]
1152          */
1153
1154         if (len < 14) {
1155                 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1156                            "(len=%lu)", (unsigned long) len);
1157                 return -1;
1158         }
1159
1160         action = data[1];
1161         sta_addr = data + 2;
1162         target_ap = data + 8;
1163         ies = data + 14;
1164         ies_len = len - 14;
1165
1166         wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1167                    " Target AP=" MACSTR " Action=%d)",
1168                    MAC2STR(sta_addr), MAC2STR(target_ap), action);
1169
1170         if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1171                 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1172                            "STA=" MACSTR " STA-Address=" MACSTR,
1173                            MAC2STR(sm->addr), MAC2STR(sta_addr));
1174                 return -1;
1175         }
1176
1177         /*
1178          * Do some sanity checking on the target AP address (not own and not
1179          * broadcast. This could be extended to filter based on a list of known
1180          * APs in the MD (if such a list were configured).
1181          */
1182         if ((target_ap[0] & 0x01) ||
1183             os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1184                 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1185                            "frame");
1186                 return -1;
1187         }
1188
1189         wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1190
1191         /* RRB - Forward action frame to the target AP */
1192         frame = os_malloc(sizeof(*frame) + len);
1193         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1194         frame->packet_type = FT_PACKET_REQUEST;
1195         frame->action_length = host_to_le16(len);
1196         os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1197         os_memcpy(frame + 1, data, len);
1198
1199         wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1200                         sizeof(*frame) + len);
1201         os_free(frame);
1202
1203         return 0;
1204 }
1205
1206
1207 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1208                                  const u8 *current_ap, const u8 *sta_addr,
1209                                  const u8 *body, size_t len)
1210 {
1211         struct wpa_state_machine *sm;
1212         u16 status;
1213         u8 *resp_ies, *pos;
1214         size_t resp_ies_len, rlen;
1215         struct ft_rrb_frame *frame;
1216
1217         sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1218         if (sm == NULL) {
1219                 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1220                            "RRB Request");
1221                 return -1;
1222         }
1223
1224         wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1225
1226         status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1227                                          &resp_ies_len);
1228
1229         wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1230                    " CurrentAP=" MACSTR " status=%d",
1231                    MAC2STR(sm->addr), MAC2STR(current_ap), status);
1232         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1233
1234         /* RRB - Forward action frame response to the Current AP */
1235
1236         /*
1237          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1238          * Status_Code[2] FT Request action frame body[variable]
1239          */
1240         rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1241
1242         frame = os_malloc(sizeof(*frame) + rlen);
1243         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1244         frame->packet_type = FT_PACKET_RESPONSE;
1245         frame->action_length = host_to_le16(rlen);
1246         os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1247         pos = (u8 *) (frame + 1);
1248         *pos++ = WLAN_ACTION_FT;
1249         *pos++ = 2; /* Action: Response */
1250         os_memcpy(pos, sta_addr, ETH_ALEN);
1251         pos += ETH_ALEN;
1252         os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1253         pos += ETH_ALEN;
1254         WPA_PUT_LE16(pos, status);
1255         pos += 2;
1256         if (resp_ies) {
1257                 os_memcpy(pos, resp_ies, resp_ies_len);
1258                 os_free(resp_ies);
1259         }
1260
1261         wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1262                         sizeof(*frame) + rlen);
1263         os_free(frame);
1264
1265         return 0;
1266 }
1267
1268
1269 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1270                               const u8 *src_addr,
1271                               const u8 *data, size_t data_len)
1272 {
1273         struct ft_r0kh_r1kh_pull_frame *frame, f;
1274         struct ft_remote_r1kh *r1kh;
1275         struct ft_r0kh_r1kh_resp_frame resp, r;
1276         u8 pmk_r0[PMK_LEN];
1277
1278         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1279
1280         if (data_len < sizeof(*frame))
1281                 return -1;
1282
1283         r1kh = wpa_auth->conf.r1kh_list;
1284         while (r1kh) {
1285                 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1286                         break;
1287                 r1kh = r1kh->next;
1288         }
1289         if (r1kh == NULL) {
1290                 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1291                            "PMK-R1 pull source address " MACSTR,
1292                            MAC2STR(src_addr));
1293                 return -1;
1294         }
1295
1296         frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1297         /* aes_unwrap() does not support inplace decryption, so use a temporary
1298          * buffer for the data. */
1299         if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1300                        frame->nonce, f.nonce) < 0) {
1301                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1302                            "request from " MACSTR, MAC2STR(src_addr));
1303                 return -1;
1304         }
1305
1306         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1307                     f.nonce, sizeof(f.nonce));
1308         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1309                     f.pmk_r0_name, WPA_PMK_NAME_LEN);
1310         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1311                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1312
1313         os_memset(&resp, 0, sizeof(resp));
1314         resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1315         resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1316         resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1317         os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1318
1319         /* aes_wrap() does not support inplace encryption, so use a temporary
1320          * buffer for the data. */
1321         os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1322         os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1323         os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1324         if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0) <
1325             0) {
1326                 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1327                            "PMK-R1 pull");
1328                 return -1;
1329         }
1330
1331         wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1332                           r.pmk_r1, r.pmk_r1_name);
1333         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1334         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1335                     WPA_PMK_NAME_LEN);
1336
1337         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1338                      r.nonce, resp.nonce) < 0) {
1339                 os_memset(pmk_r0, 0, PMK_LEN);
1340                 return -1;
1341         }
1342
1343         os_memset(pmk_r0, 0, PMK_LEN);
1344
1345         wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1346
1347         return 0;
1348 }
1349
1350
1351 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1352                               const u8 *src_addr,
1353                               const u8 *data, size_t data_len)
1354 {
1355         struct ft_r0kh_r1kh_resp_frame *frame, f;
1356         struct ft_remote_r0kh *r0kh;
1357
1358         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1359
1360         if (data_len < sizeof(*frame))
1361                 return -1;
1362
1363         r0kh = wpa_auth->conf.r0kh_list;
1364         while (r0kh) {
1365                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1366                         break;
1367                 r0kh = r0kh->next;
1368         }
1369         if (r0kh == NULL) {
1370                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1371                            "PMK-R0 pull response source address " MACSTR,
1372                            MAC2STR(src_addr));
1373                 return -1;
1374         }
1375
1376         frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1377         /* aes_unwrap() does not support inplace decryption, so use a temporary
1378          * buffer for the data. */
1379         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1380                        frame->nonce, f.nonce) < 0) {
1381                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1382                            "response from " MACSTR, MAC2STR(src_addr));
1383                 return -1;
1384         }
1385
1386         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1387             != 0) {
1388                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1389                            "matching R1KH-ID");
1390                 return -1;
1391         }
1392
1393         /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1394          * and call this requests callback function to finish request
1395          * processing */
1396
1397         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1398                     f.nonce, sizeof(f.nonce));
1399         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1400                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1401         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1402                         f.pmk_r1, PMK_LEN);
1403         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1404                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1405
1406         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name);
1407         os_memset(f.pmk_r1, 0, PMK_LEN);
1408
1409         return 0;
1410 }
1411
1412
1413 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1414                               const u8 *src_addr,
1415                               const u8 *data, size_t data_len)
1416 {
1417         struct ft_r0kh_r1kh_push_frame *frame, f;
1418         struct ft_remote_r0kh *r0kh;
1419         struct os_time now;
1420         os_time_t tsend;
1421
1422         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1423
1424         if (data_len < sizeof(*frame))
1425                 return -1;
1426
1427         r0kh = wpa_auth->conf.r0kh_list;
1428         while (r0kh) {
1429                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1430                         break;
1431                 r0kh = r0kh->next;
1432         }
1433         if (r0kh == NULL) {
1434                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1435                            "PMK-R0 push source address " MACSTR,
1436                            MAC2STR(src_addr));
1437                 return -1;
1438         }
1439
1440         frame = (struct ft_r0kh_r1kh_push_frame *) data;
1441         /* aes_unwrap() does not support inplace decryption, so use a temporary
1442          * buffer for the data. */
1443         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1444                        frame->timestamp, f.timestamp) < 0) {
1445                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1446                            MACSTR, MAC2STR(src_addr));
1447                 return -1;
1448         }
1449
1450         os_get_time(&now);
1451         tsend = WPA_GET_LE32(f.timestamp);
1452         if ((now.sec > tsend && now.sec - tsend > 60) ||
1453             (now.sec < tsend && tsend - now.sec > 60)) {
1454                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1455                            "timestamp: sender time %d own time %d\n",
1456                            (int) tsend, (int) now.sec);
1457                 return -1;
1458         }
1459
1460         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1461             != 0) {
1462                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1463                            "R1KH-ID (received " MACSTR " own " MACSTR ")",
1464                            MAC2STR(f.r1kh_id),
1465                            MAC2STR(wpa_auth->conf.r1_key_holder));
1466                 return -1;
1467         }
1468
1469         wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1470                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1471         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1472                         f.pmk_r1, PMK_LEN);
1473         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1474                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1475
1476         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name);
1477         os_memset(f.pmk_r1, 0, PMK_LEN);
1478
1479         return 0;
1480 }
1481
1482
1483 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1484                   const u8 *data, size_t data_len)
1485 {
1486         struct ft_rrb_frame *frame;
1487         u16 alen;
1488         const u8 *pos, *end, *start;
1489         u8 action;
1490         const u8 *sta_addr, *target_ap_addr;
1491
1492         wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1493                    MAC2STR(src_addr));
1494
1495         if (data_len < sizeof(*frame)) {
1496                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1497                            (unsigned long) data_len);
1498                 return -1;
1499         }
1500
1501         pos = data;
1502         frame = (struct ft_rrb_frame *) pos;
1503         pos += sizeof(*frame);
1504
1505         alen = le_to_host16(frame->action_length);
1506         wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1507                    "action_length=%d ap_address=" MACSTR,
1508                    frame->frame_type, frame->packet_type, alen,
1509                    MAC2STR(frame->ap_address));
1510
1511         if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1512                 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1513                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1514                            "unrecognized type %d", frame->frame_type);
1515                 return -1;
1516         }
1517
1518         if (alen > data_len - sizeof(*frame)) {
1519                 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1520                            "frame");
1521                 return -1;
1522         }
1523
1524         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1525                 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1526         if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1527                 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1528         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1529                 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1530
1531         wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1532
1533         if (alen < 1 + 1 + 2 * ETH_ALEN) {
1534                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1535                            "room for Action Frame body); alen=%lu",
1536                            (unsigned long) alen);
1537                 return -1;
1538         }
1539         start = pos;
1540         end = pos + alen;
1541
1542         if (*pos != WLAN_ACTION_FT) {
1543                 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1544                            "%d", *pos);
1545                 return -1;
1546         }
1547
1548         pos++;
1549         action = *pos++;
1550         sta_addr = pos;
1551         pos += ETH_ALEN;
1552         target_ap_addr = pos;
1553         pos += ETH_ALEN;
1554         wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1555                    MACSTR " target_ap_addr=" MACSTR,
1556                    action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1557
1558         if (frame->packet_type == FT_PACKET_REQUEST) {
1559                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1560
1561                 if (action != 1) {
1562                         wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1563                                    "RRB Request", action);
1564                         return -1;
1565                 }
1566
1567                 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1568                         wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1569                                    "RRB Request does not match with own "
1570                                    "address");
1571                         return -1;
1572                 }
1573
1574                 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1575                                           sta_addr, pos, end - pos) < 0)
1576                         return -1;
1577         } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1578                 u16 status_code;
1579
1580                 if (end - pos < 2) {
1581                         wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1582                                    "code in RRB Response");
1583                         return -1;
1584                 }
1585                 status_code = WPA_GET_LE16(pos);
1586                 pos += 2;
1587
1588                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1589                            "(status_code=%d)", status_code);
1590
1591                 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1592                         return -1;
1593         } else {
1594                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1595                            "packet_type %d", frame->packet_type);
1596                 return -1;
1597         }
1598
1599         return 0;
1600 }
1601
1602
1603 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1604                                    struct wpa_ft_pmk_r0_sa *pmk_r0,
1605                                    struct ft_remote_r1kh *r1kh,
1606                                    const u8 *s1kh_id)
1607 {
1608         struct ft_r0kh_r1kh_push_frame frame, f;
1609         struct os_time now;
1610
1611         os_memset(&frame, 0, sizeof(frame));
1612         frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1613         frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1614         frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1615         os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1616
1617         /* aes_wrap() does not support inplace encryption, so use a temporary
1618          * buffer for the data. */
1619         os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1620         os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1621         os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1622         wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1623                           s1kh_id, f.pmk_r1, f.pmk_r1_name);
1624         wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1625         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1626         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1627                     WPA_PMK_NAME_LEN);
1628         os_get_time(&now);
1629         WPA_PUT_LE32(f.timestamp, now.sec);
1630         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1631                      f.timestamp, frame.timestamp) < 0)
1632                 return;
1633
1634         wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1635 }
1636
1637
1638 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1639 {
1640         struct wpa_ft_pmk_r0_sa *r0;
1641         struct ft_remote_r1kh *r1kh;
1642
1643         if (!wpa_auth->conf.pmk_r1_push)
1644                 return;
1645
1646         r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1647         while (r0) {
1648                 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1649                         break;
1650                 r0 = r0->next;
1651         }
1652
1653         if (r0 == NULL || r0->pmk_r1_pushed)
1654                 return;
1655         r0->pmk_r1_pushed = 1;
1656
1657         wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1658                    "for STA " MACSTR, MAC2STR(addr));
1659
1660         r1kh = wpa_auth->conf.r1kh_list;
1661         while (r1kh) {
1662                 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
1663                 r1kh = r1kh->next;
1664         }
1665 }
1666
1667 #endif /* CONFIG_IEEE80211R */