src/ap/wpa_auth_ft.c

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