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)
 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, sizeof(*ptk), ptk_name);
 381         wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, sizeof(*ptk));
 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                                    const char *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         char *alg;
 856         int klen;
 857
 858         /* MLME-SETKEYS.request(PTK) */
 859         if (sm->pairwise == WPA_CIPHER_TKIP) {
 860                 alg = "TKIP";
 861                 klen = 32;
 862         } else if (sm->pairwise == WPA_CIPHER_CCMP) {
 863                 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;
 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         wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
 983                           sm->wpa_auth->addr, pmk_r1_name,
 984                           (u8 *) &sm->PTK, sizeof(sm->PTK), ptk_name);
 985         wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
 986                         (u8 *) &sm->PTK, sizeof(sm->PTK));
 987         wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
 988
 989         wpa_ft_install_ptk(sm);
 990
 991         buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
 992                 2 + FT_R1KH_ID_LEN + 200;
 993         *resp_ies = os_zalloc(buflen);
 994         if (*resp_ies == NULL) {
 995                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 996         }
 997
 998         pos = *resp_ies;
 999         end = *resp_ies + buflen;
1000
1001         ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1002         if (ret < 0) {
1003                 os_free(*resp_ies);
1004                 *resp_ies = NULL;
1005                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1006         }
1007         pos += ret;
1008
1009         ret = wpa_write_mdie(conf, pos, end - pos);
1010         if (ret < 0) {
1011                 os_free(*resp_ies);
1012                 *resp_ies = NULL;
1013                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1014         }
1015         pos += ret;
1016
1017         ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1018                              sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1019         if (ret < 0) {
1020                 os_free(*resp_ies);
1021                 *resp_ies = NULL;
1022                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1023         }
1024         pos += ret;
1025
1026         *resp_ies_len = pos - *resp_ies;
1027
1028         return WLAN_STATUS_SUCCESS;
1029 }
1030
1031
1032 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1033                          u16 auth_transaction, const u8 *ies, size_t ies_len,
1034                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1035                                     u16 auth_transaction, u16 status,
1036                                     const u8 *ies, size_t ies_len),
1037                          void *ctx)
1038 {
1039         u16 status;
1040         u8 *resp_ies;
1041         size_t resp_ies_len;
1042
1043         if (sm == NULL) {
1044                 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1045                            "WPA SM not available");
1046                 return;
1047         }
1048
1049         wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1050                    " BSSID=" MACSTR " transaction=%d",
1051                    MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1052         status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1053                                          &resp_ies_len);
1054
1055         wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1056                    " auth_transaction=%d status=%d",
1057                    MAC2STR(sm->addr), auth_transaction + 1, status);
1058         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1059         cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1060            resp_ies, resp_ies_len);
1061         os_free(resp_ies);
1062 }
1063
1064
1065 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1066                             size_t ies_len)
1067 {
1068         struct wpa_ft_ies parse;
1069         struct rsn_mdie *mdie;
1070         struct rsn_ftie *ftie;
1071         u8 mic[16];
1072
1073         if (sm == NULL)
1074                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1075
1076         wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1077
1078         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1079                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1080                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1081         }
1082
1083         if (parse.rsn == NULL) {
1084                 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1085                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1086         }
1087
1088         if (parse.rsn_pmkid == NULL) {
1089                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1090                 return WLAN_STATUS_INVALID_PMKID;
1091         }
1092
1093         if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1094         {
1095                 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1096                            "with the PMKR1Name derived from auth request");
1097                 return WLAN_STATUS_INVALID_PMKID;
1098         }
1099
1100         mdie = (struct rsn_mdie *) parse.mdie;
1101         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1102             os_memcmp(mdie->mobility_domain,
1103                       sm->wpa_auth->conf.mobility_domain,
1104                       MOBILITY_DOMAIN_ID_LEN) != 0) {
1105                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1106                 return WLAN_STATUS_INVALID_MDIE;
1107         }
1108
1109         ftie = (struct rsn_ftie *) parse.ftie;
1110         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1111                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1112                 return WLAN_STATUS_INVALID_FTIE;
1113         }
1114
1115         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1116                        parse.mdie - 2, parse.mdie_len + 2,
1117                        parse.ftie - 2, parse.ftie_len + 2,
1118                        parse.rsn - 2, parse.rsn_len + 2,
1119                        parse.ric, parse.ric_len,
1120                        mic) < 0) {
1121                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1122                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1123         }
1124
1125         if (os_memcmp(mic, ftie->mic, 16) != 0) {
1126                 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1127                 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1128                 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1129                 return WLAN_STATUS_INVALID_FTIE;
1130         }
1131
1132         return WLAN_STATUS_SUCCESS;
1133 }
1134
1135
1136 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1137 {
1138         const u8 *sta_addr, *target_ap;
1139         const u8 *ies;
1140         size_t ies_len;
1141         u8 action;
1142         struct ft_rrb_frame *frame;
1143
1144         if (sm == NULL)
1145                 return -1;
1146
1147         /*
1148          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1149          * FT Request action frame body[variable]
1150          */
1151
1152         if (len < 14) {
1153                 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1154                            "(len=%lu)", (unsigned long) len);
1155                 return -1;
1156         }
1157
1158         action = data[1];
1159         sta_addr = data + 2;
1160         target_ap = data + 8;
1161         ies = data + 14;
1162         ies_len = len - 14;
1163
1164         wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1165                    " Target AP=" MACSTR " Action=%d)",
1166                    MAC2STR(sta_addr), MAC2STR(target_ap), action);
1167
1168         if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1169                 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1170                            "STA=" MACSTR " STA-Address=" MACSTR,
1171                            MAC2STR(sm->addr), MAC2STR(sta_addr));
1172                 return -1;
1173         }
1174
1175         /*
1176          * Do some sanity checking on the target AP address (not own and not
1177          * broadcast. This could be extended to filter based on a list of known
1178          * APs in the MD (if such a list were configured).
1179          */
1180         if ((target_ap[0] & 0x01) ||
1181             os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1182                 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1183                            "frame");
1184                 return -1;
1185         }
1186
1187         wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1188
1189         /* RRB - Forward action frame to the target AP */
1190         frame = os_malloc(sizeof(*frame) + len);
1191         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1192         frame->packet_type = FT_PACKET_REQUEST;
1193         frame->action_length = host_to_le16(len);
1194         os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1195         os_memcpy(frame + 1, data, len);
1196
1197         wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1198                         sizeof(*frame) + len);
1199         os_free(frame);
1200
1201         return 0;
1202 }
1203
1204
1205 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1206                                  const u8 *current_ap, const u8 *sta_addr,
1207                                  const u8 *body, size_t len)
1208 {
1209         struct wpa_state_machine *sm;
1210         u16 status;
1211         u8 *resp_ies, *pos;
1212         size_t resp_ies_len, rlen;
1213         struct ft_rrb_frame *frame;
1214
1215         sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1216         if (sm == NULL) {
1217                 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1218                            "RRB Request");
1219                 return -1;
1220         }
1221
1222         wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1223
1224         status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1225                                          &resp_ies_len);
1226
1227         wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1228                    " CurrentAP=" MACSTR " status=%d",
1229                    MAC2STR(sm->addr), MAC2STR(current_ap), status);
1230         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1231
1232         /* RRB - Forward action frame response to the Current AP */
1233
1234         /*
1235          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1236          * Status_Code[2] FT Request action frame body[variable]
1237          */
1238         rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1239
1240         frame = os_malloc(sizeof(*frame) + rlen);
1241         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1242         frame->packet_type = FT_PACKET_RESPONSE;
1243         frame->action_length = host_to_le16(rlen);
1244         os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1245         pos = (u8 *) (frame + 1);
1246         *pos++ = WLAN_ACTION_FT;
1247         *pos++ = 2; /* Action: Response */
1248         os_memcpy(pos, sta_addr, ETH_ALEN);
1249         pos += ETH_ALEN;
1250         os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1251         pos += ETH_ALEN;
1252         WPA_PUT_LE16(pos, status);
1253         pos += 2;
1254         if (resp_ies) {
1255                 os_memcpy(pos, resp_ies, resp_ies_len);
1256                 os_free(resp_ies);
1257         }
1258
1259         wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1260                         sizeof(*frame) + rlen);
1261         os_free(frame);
1262
1263         return 0;
1264 }
1265
1266
1267 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1268                               const u8 *src_addr,
1269                               const u8 *data, size_t data_len)
1270 {
1271         struct ft_r0kh_r1kh_pull_frame *frame, f;
1272         struct ft_remote_r1kh *r1kh;
1273         struct ft_r0kh_r1kh_resp_frame resp, r;
1274         u8 pmk_r0[PMK_LEN];
1275
1276         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1277
1278         if (data_len < sizeof(*frame))
1279                 return -1;
1280
1281         r1kh = wpa_auth->conf.r1kh_list;
1282         while (r1kh) {
1283                 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1284                         break;
1285                 r1kh = r1kh->next;
1286         }
1287         if (r1kh == NULL) {
1288                 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1289                            "PMK-R1 pull source address " MACSTR,
1290                            MAC2STR(src_addr));
1291                 return -1;
1292         }
1293
1294         frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1295         /* aes_unwrap() does not support inplace decryption, so use a temporary
1296          * buffer for the data. */
1297         if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1298                        frame->nonce, f.nonce) < 0) {
1299                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1300                            "request from " MACSTR, MAC2STR(src_addr));
1301                 return -1;
1302         }
1303
1304         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1305                     f.nonce, sizeof(f.nonce));
1306         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1307                     f.pmk_r0_name, WPA_PMK_NAME_LEN);
1308         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1309                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1310
1311         os_memset(&resp, 0, sizeof(resp));
1312         resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1313         resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1314         resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1315         os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1316
1317         /* aes_wrap() does not support inplace encryption, so use a temporary
1318          * buffer for the data. */
1319         os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1320         os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1321         os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1322         if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0) <
1323             0) {
1324                 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1325                            "PMK-R1 pull");
1326                 return -1;
1327         }
1328
1329         wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1330                           r.pmk_r1, r.pmk_r1_name);
1331         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1332         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1333                     WPA_PMK_NAME_LEN);
1334
1335         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1336                      r.nonce, resp.nonce) < 0) {
1337                 os_memset(pmk_r0, 0, PMK_LEN);
1338                 return -1;
1339         }
1340
1341         os_memset(pmk_r0, 0, PMK_LEN);
1342
1343         wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1344
1345         return 0;
1346 }
1347
1348
1349 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1350                               const u8 *src_addr,
1351                               const u8 *data, size_t data_len)
1352 {
1353         struct ft_r0kh_r1kh_resp_frame *frame, f;
1354         struct ft_remote_r0kh *r0kh;
1355
1356         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1357
1358         if (data_len < sizeof(*frame))
1359                 return -1;
1360
1361         r0kh = wpa_auth->conf.r0kh_list;
1362         while (r0kh) {
1363                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1364                         break;
1365                 r0kh = r0kh->next;
1366         }
1367         if (r0kh == NULL) {
1368                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1369                            "PMK-R0 pull response source address " MACSTR,
1370                            MAC2STR(src_addr));
1371                 return -1;
1372         }
1373
1374         frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1375         /* aes_unwrap() does not support inplace decryption, so use a temporary
1376          * buffer for the data. */
1377         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1378                        frame->nonce, f.nonce) < 0) {
1379                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1380                            "response from " MACSTR, MAC2STR(src_addr));
1381                 return -1;
1382         }
1383
1384         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1385             != 0) {
1386                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1387                            "matching R1KH-ID");
1388                 return -1;
1389         }
1390
1391         /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1392          * and call this requests callback function to finish request
1393          * processing */
1394
1395         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1396                     f.nonce, sizeof(f.nonce));
1397         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1398                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1399         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1400                         f.pmk_r1, PMK_LEN);
1401         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1402                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1403
1404         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name);
1405         os_memset(f.pmk_r1, 0, PMK_LEN);
1406
1407         return 0;
1408 }
1409
1410
1411 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1412                               const u8 *src_addr,
1413                               const u8 *data, size_t data_len)
1414 {
1415         struct ft_r0kh_r1kh_push_frame *frame, f;
1416         struct ft_remote_r0kh *r0kh;
1417         struct os_time now;
1418         os_time_t tsend;
1419
1420         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1421
1422         if (data_len < sizeof(*frame))
1423                 return -1;
1424
1425         r0kh = wpa_auth->conf.r0kh_list;
1426         while (r0kh) {
1427                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1428                         break;
1429                 r0kh = r0kh->next;
1430         }
1431         if (r0kh == NULL) {
1432                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1433                            "PMK-R0 push source address " MACSTR,
1434                            MAC2STR(src_addr));
1435                 return -1;
1436         }
1437
1438         frame = (struct ft_r0kh_r1kh_push_frame *) data;
1439         /* aes_unwrap() does not support inplace decryption, so use a temporary
1440          * buffer for the data. */
1441         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1442                        frame->timestamp, f.timestamp) < 0) {
1443                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1444                            MACSTR, MAC2STR(src_addr));
1445                 return -1;
1446         }
1447
1448         os_get_time(&now);
1449         tsend = WPA_GET_LE32(f.timestamp);
1450         if ((now.sec > tsend && now.sec - tsend > 60) ||
1451             (now.sec < tsend && tsend - now.sec > 60)) {
1452                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1453                            "timestamp: sender time %d own time %d\n",
1454                            (int) tsend, (int) now.sec);
1455                 return -1;
1456         }
1457
1458         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1459             != 0) {
1460                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1461                            "R1KH-ID (received " MACSTR " own " MACSTR ")",
1462                            MAC2STR(f.r1kh_id),
1463                            MAC2STR(wpa_auth->conf.r1_key_holder));
1464                 return -1;
1465         }
1466
1467         wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1468                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1469         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1470                         f.pmk_r1, PMK_LEN);
1471         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1472                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1473
1474         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name);
1475         os_memset(f.pmk_r1, 0, PMK_LEN);
1476
1477         return 0;
1478 }
1479
1480
1481 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1482                   const u8 *data, size_t data_len)
1483 {
1484         struct ft_rrb_frame *frame;
1485         u16 alen;
1486         const u8 *pos, *end, *start;
1487         u8 action;
1488         const u8 *sta_addr, *target_ap_addr;
1489
1490         wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1491                    MAC2STR(src_addr));
1492
1493         if (data_len < sizeof(*frame)) {
1494                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1495                            (unsigned long) data_len);
1496                 return -1;
1497         }
1498
1499         pos = data;
1500         frame = (struct ft_rrb_frame *) pos;
1501         pos += sizeof(*frame);
1502
1503         alen = le_to_host16(frame->action_length);
1504         wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1505                    "action_length=%d ap_address=" MACSTR,
1506                    frame->frame_type, frame->packet_type, alen,
1507                    MAC2STR(frame->ap_address));
1508
1509         if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1510                 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1511                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1512                            "unrecognized type %d", frame->frame_type);
1513                 return -1;
1514         }
1515
1516         if (alen > data_len - sizeof(*frame)) {
1517                 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1518                            "frame");
1519                 return -1;
1520         }
1521
1522         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1523                 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1524         if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1525                 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1526         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1527                 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1528
1529         wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1530
1531         if (alen < 1 + 1 + 2 * ETH_ALEN) {
1532                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1533                            "room for Action Frame body); alen=%lu",
1534                            (unsigned long) alen);
1535                 return -1;
1536         }
1537         start = pos;
1538         end = pos + alen;
1539
1540         if (*pos != WLAN_ACTION_FT) {
1541                 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1542                            "%d", *pos);
1543                 return -1;
1544         }
1545
1546         pos++;
1547         action = *pos++;
1548         sta_addr = pos;
1549         pos += ETH_ALEN;
1550         target_ap_addr = pos;
1551         pos += ETH_ALEN;
1552         wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1553                    MACSTR " target_ap_addr=" MACSTR,
1554                    action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1555
1556         if (frame->packet_type == FT_PACKET_REQUEST) {
1557                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1558
1559                 if (action != 1) {
1560                         wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1561                                    "RRB Request", action);
1562                         return -1;
1563                 }
1564
1565                 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1566                         wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1567                                    "RRB Request does not match with own "
1568                                    "address");
1569                         return -1;
1570                 }
1571
1572                 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1573                                           sta_addr, pos, end - pos) < 0)
1574                         return -1;
1575         } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1576                 u16 status_code;
1577
1578                 if (end - pos < 2) {
1579                         wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1580                                    "code in RRB Response");
1581                         return -1;
1582                 }
1583                 status_code = WPA_GET_LE16(pos);
1584                 pos += 2;
1585
1586                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1587                            "(status_code=%d)", status_code);
1588
1589                 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1590                         return -1;
1591         } else {
1592                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1593                            "packet_type %d", frame->packet_type);
1594                 return -1;
1595         }
1596
1597         return 0;
1598 }
1599
1600
1601 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1602                                    struct wpa_ft_pmk_r0_sa *pmk_r0,
1603                                    struct ft_remote_r1kh *r1kh,
1604                                    const u8 *s1kh_id)
1605 {
1606         struct ft_r0kh_r1kh_push_frame frame, f;
1607         struct os_time now;
1608
1609         os_memset(&frame, 0, sizeof(frame));
1610         frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1611         frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1612         frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1613         os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1614
1615         /* aes_wrap() does not support inplace encryption, so use a temporary
1616          * buffer for the data. */
1617         os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1618         os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1619         os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1620         wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1621                           s1kh_id, f.pmk_r1, f.pmk_r1_name);
1622         wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1623         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1624         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1625                     WPA_PMK_NAME_LEN);
1626         os_get_time(&now);
1627         WPA_PUT_LE32(f.timestamp, now.sec);
1628         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1629                      f.timestamp, frame.timestamp) < 0)
1630                 return;
1631
1632         wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1633 }
1634
1635
1636 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1637 {
1638         struct wpa_ft_pmk_r0_sa *r0;
1639         struct ft_remote_r1kh *r1kh;
1640
1641         if (!wpa_auth->conf.pmk_r1_push)
1642                 return;
1643
1644         r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1645         while (r0) {
1646                 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1647                         break;
1648                 r0 = r0->next;
1649         }
1650
1651         if (r0 == NULL || r0->pmk_r1_pushed)
1652                 return;
1653         r0->pmk_r1_pushed = 1;
1654
1655         wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1656                    "for STA " MACSTR, MAC2STR(addr));
1657
1658         r1kh = wpa_auth->conf.r1kh_list;
1659         while (r1kh) {
1660                 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr);
1661                 r1kh = r1kh->next;
1662         }
1663 }
1664
1665 #endif /* CONFIG_IEEE80211R */