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