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[1] | Key Length[1] | RSC[8] |
 442          * Key[5..32].
 443          */
 444         subelem_len = 12 + 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] = 10 + key_len + 8;
 451         subelem[2] = gsm->GN & 0x03; /* Key ID in B0-B1 of Key Info */
 452         subelem[3] = gsm->GTK_len;
 453         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 4);
 454         if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 12)) {
 455                 os_free(subelem);
 456                 return NULL;
 457         }
 458
 459         *len = subelem_len;
 460         return subelem;
 461 }
 462
 463
 464 #ifdef CONFIG_IEEE80211W
 465 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
 466 {
 467         u8 *subelem, *pos;
 468         struct wpa_group *gsm = sm->group;
 469         size_t subelem_len;
 470
 471         /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
 472          * Key[16+8] */
 473         subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
 474         subelem = os_zalloc(subelem_len);
 475         if (subelem == NULL)
 476                 return NULL;
 477
 478         pos = subelem;
 479         *pos++ = FTIE_SUBELEM_IGTK;
 480         *pos++ = subelem_len - 2;
 481         WPA_PUT_LE16(pos, gsm->GN_igtk);
 482         pos += 2;
 483         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
 484         pos += 6;
 485         *pos++ = WPA_IGTK_LEN;
 486         if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
 487                      gsm->IGTK[gsm->GN_igtk - 4], pos)) {
 488                 os_free(subelem);
 489                 return NULL;
 490         }
 491
 492         *len = subelem_len;
 493         return subelem;
 494 }
 495 #endif /* CONFIG_IEEE80211W */
 496
 497
 498 static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
 499                                 const u8 *ies, size_t ies_len)
 500 {
 501         struct ieee802_11_elems parse;
 502         struct rsn_rdie *rdie;
 503
 504         wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
 505                    id, descr_count);
 506         wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
 507                     ies, ies_len);
 508
 509         if (end - pos < (int) sizeof(*rdie)) {
 510                 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
 511                 return pos;
 512         }
 513
 514         *pos++ = WLAN_EID_RIC_DATA;
 515         *pos++ = sizeof(*rdie);
 516         rdie = (struct rsn_rdie *) pos;
 517         rdie->id = id;
 518         rdie->descr_count = 0;
 519         rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
 520         pos += sizeof(*rdie);
 521
 522         if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
 523             ParseFailed) {
 524                 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
 525                 rdie->status_code =
 526                         host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 527                 return pos;
 528         }
 529
 530 #ifdef NEED_AP_MLME
 531         if (parse.wmm_tspec) {
 532                 struct wmm_tspec_element *tspec;
 533                 int res;
 534
 535                 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
 536                         wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
 537                                    "(%d)", (int) parse.wmm_tspec_len);
 538                         rdie->status_code =
 539                                 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 540                         return pos;
 541                 }
 542                 if (end - pos < (int) sizeof(*tspec)) {
 543                         wpa_printf(MSG_ERROR, "FT: Not enough room for "
 544                                    "response TSPEC");
 545                         rdie->status_code =
 546                                 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 547                         return pos;
 548                 }
 549                 tspec = (struct wmm_tspec_element *) pos;
 550                 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
 551                 res = wmm_process_tspec(tspec);
 552                 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
 553                 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
 554                         rdie->status_code =
 555                                 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
 556                 else if (res == WMM_ADDTS_STATUS_REFUSED)
 557                         rdie->status_code =
 558                                 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
 559                 else {
 560                         /* TSPEC accepted; include updated TSPEC in response */
 561                         rdie->descr_count = 1;
 562                         pos += sizeof(*tspec);
 563                 }
 564                 return pos;
 565         }
 566 #endif /* NEED_AP_MLME */
 567
 568         wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
 569         rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
 570         return pos;
 571 }
 572
 573
 574 static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
 575 {
 576         const u8 *rpos, *start;
 577         const struct rsn_rdie *rdie;
 578
 579         wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
 580
 581         rpos = ric;
 582         while (rpos + sizeof(*rdie) < ric + ric_len) {
 583                 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
 584                     rpos + 2 + rpos[1] > ric + ric_len)
 585                         break;
 586                 rdie = (const struct rsn_rdie *) (rpos + 2);
 587                 rpos += 2 + rpos[1];
 588                 start = rpos;
 589
 590                 while (rpos + 2 <= ric + ric_len &&
 591                        rpos + 2 + rpos[1] <= ric + ric_len) {
 592                         if (rpos[0] == WLAN_EID_RIC_DATA)
 593                                 break;
 594                         rpos += 2 + rpos[1];
 595                 }
 596                 pos = wpa_ft_process_rdie(pos, end, rdie->id,
 597                                           rdie->descr_count,
 598                                           start, rpos - start);
 599         }
 600
 601         return pos;
 602 }
 603
 604
 605 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
 606                                  size_t max_len, int auth_alg,
 607                                  const u8 *req_ies, size_t req_ies_len)
 608 {
 609         u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
 610         size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
 611         int res;
 612         struct wpa_auth_config *conf;
 613         struct rsn_ftie *_ftie;
 614         struct wpa_ft_ies parse;
 615         u8 *ric_start;
 616
 617         if (sm == NULL)
 618                 return pos;
 619
 620         conf = &sm->wpa_auth->conf;
 621
 622         if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
 623             sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
 624                 return pos;
 625
 626         end = pos + max_len;
 627
 628         if (auth_alg == WLAN_AUTH_FT) {
 629                 /*
 630                  * RSN (only present if this is a Reassociation Response and
 631                  * part of a fast BSS transition)
 632                  */
 633                 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
 634                 if (res < 0)
 635                         return pos;
 636                 rsnie = pos;
 637                 rsnie_len = res;
 638                 pos += res;
 639         }
 640
 641         /* Mobility Domain Information */
 642         res = wpa_write_mdie(conf, pos, end - pos);
 643         if (res < 0)
 644                 return pos;
 645         mdie = pos;
 646         mdie_len = res;
 647         pos += res;
 648
 649         /* Fast BSS Transition Information */
 650         if (auth_alg == WLAN_AUTH_FT) {
 651                 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
 652                 r0kh_id = sm->r0kh_id;
 653                 r0kh_id_len = sm->r0kh_id_len;
 654 #ifdef CONFIG_IEEE80211W
 655                 if (sm->mgmt_frame_prot) {
 656                         u8 *igtk;
 657                         size_t igtk_len;
 658                         u8 *nbuf;
 659                         igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
 660                         if (igtk == NULL) {
 661                                 os_free(subelem);
 662                                 return pos;
 663                         }
 664                         nbuf = os_realloc(subelem, subelem_len + igtk_len);
 665                         if (nbuf == NULL) {
 666                                 os_free(subelem);
 667                                 os_free(igtk);
 668                                 return pos;
 669                         }
 670                         subelem = nbuf;
 671                         os_memcpy(subelem + subelem_len, igtk, igtk_len);
 672                         subelem_len += igtk_len;
 673                         os_free(igtk);
 674                 }
 675 #endif /* CONFIG_IEEE80211W */
 676         } else {
 677                 r0kh_id = conf->r0_key_holder;
 678                 r0kh_id_len = conf->r0_key_holder_len;
 679         }
 680         res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, NULL, NULL, pos,
 681                              end - pos, subelem, subelem_len);
 682         os_free(subelem);
 683         if (res < 0)
 684                 return pos;
 685         ftie = pos;
 686         ftie_len = res;
 687         pos += res;
 688
 689         _ftie = (struct rsn_ftie *) (ftie + 2);
 690         _ftie->mic_control[1] = 3; /* Information element count */
 691
 692         ric_start = pos;
 693         if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
 694                 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
 695                 _ftie->mic_control[1] += ieee802_11_ie_count(ric_start,
 696                                                              pos - ric_start);
 697         }
 698         if (ric_start == pos)
 699                 ric_start = NULL;
 700
 701         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
 702                        mdie, mdie_len, ftie, ftie_len,
 703                        rsnie, rsnie_len,
 704                        ric_start, ric_start ? pos - ric_start : 0,
 705                        _ftie->mic) < 0)
 706                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
 707
 708         return pos;
 709 }
 710
 711
 712 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
 713                              struct wpa_ft_ies *parse)
 714 {
 715         const u8 *end, *pos;
 716
 717         parse->ftie = ie;
 718         parse->ftie_len = ie_len;
 719
 720         pos = ie + sizeof(struct rsn_ftie);
 721         end = ie + ie_len;
 722
 723         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 724                 switch (pos[0]) {
 725                 case FTIE_SUBELEM_R1KH_ID:
 726                         if (pos[1] != FT_R1KH_ID_LEN) {
 727                                 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
 728                                            "length in FTIE: %d", pos[1]);
 729                                 return -1;
 730                         }
 731                         parse->r1kh_id = pos + 2;
 732                         break;
 733                 case FTIE_SUBELEM_GTK:
 734                         parse->gtk = pos + 2;
 735                         parse->gtk_len = pos[1];
 736                         break;
 737                 case FTIE_SUBELEM_R0KH_ID:
 738                         if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
 739                                 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
 740                                            "length in FTIE: %d", pos[1]);
 741                                 return -1;
 742                         }
 743                         parse->r0kh_id = pos + 2;
 744                         parse->r0kh_id_len = pos[1];
 745                         break;
 746                 }
 747
 748                 pos += 2 + pos[1];
 749         }
 750
 751         return 0;
 752 }
 753
 754
 755 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
 756                             struct wpa_ft_ies *parse)
 757 {
 758         const u8 *end, *pos;
 759         struct wpa_ie_data data;
 760         int ret;
 761         const struct rsn_ftie *ftie;
 762         int prot_ie_count = 0;
 763
 764         os_memset(parse, 0, sizeof(*parse));
 765         if (ies == NULL)
 766                 return 0;
 767
 768         pos = ies;
 769         end = ies + ies_len;
 770         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 771                 switch (pos[0]) {
 772                 case WLAN_EID_RSN:
 773                         parse->rsn = pos + 2;
 774                         parse->rsn_len = pos[1];
 775                         ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
 776                                                    parse->rsn_len + 2,
 777                                                    &data);
 778                         if (ret < 0) {
 779                                 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
 780                                            "RSN IE: %d", ret);
 781                                 return -1;
 782                         }
 783                         if (data.num_pmkid == 1 && data.pmkid)
 784                                 parse->rsn_pmkid = data.pmkid;
 785                         break;
 786                 case WLAN_EID_MOBILITY_DOMAIN:
 787                         parse->mdie = pos + 2;
 788                         parse->mdie_len = pos[1];
 789                         break;
 790                 case WLAN_EID_FAST_BSS_TRANSITION:
 791                         if (pos[1] < sizeof(*ftie))
 792                                 return -1;
 793                         ftie = (const struct rsn_ftie *) (pos + 2);
 794                         prot_ie_count = ftie->mic_control[1];
 795                         if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
 796                                 return -1;
 797                         break;
 798                 case WLAN_EID_RIC_DATA:
 799                         if (parse->ric == NULL)
 800                                 parse->ric = pos;
 801                 }
 802
 803                 pos += 2 + pos[1];
 804         }
 805
 806         if (prot_ie_count == 0)
 807                 return 0; /* no MIC */
 808
 809         /*
 810          * Check that the protected IE count matches with IEs included in the
 811          * frame.
 812          */
 813         if (parse->rsn)
 814                 prot_ie_count--;
 815         if (parse->mdie)
 816                 prot_ie_count--;
 817         if (parse->ftie)
 818                 prot_ie_count--;
 819         if (prot_ie_count < 0) {
 820                 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
 821                            "the protected IE count");
 822                 return -1;
 823         }
 824
 825         if (prot_ie_count == 0 && parse->ric) {
 826                 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
 827                            "included in protected IE count");
 828                 return -1;
 829         }
 830
 831         /* Determine the end of the RIC IE(s) */
 832         pos = parse->ric;
 833         while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
 834                prot_ie_count) {
 835                 prot_ie_count--;
 836                 pos += 2 + pos[1];
 837         }
 838         parse->ric_len = pos - parse->ric;
 839         if (prot_ie_count) {
 840                 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
 841                            "frame", (int) prot_ie_count);
 842                 return -1;
 843         }
 844
 845         return 0;
 846 }
 847
 848
 849 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 850                                    int vlan_id,
 851                                    enum wpa_alg alg, const u8 *addr, int idx,
 852                                    u8 *key, size_t key_len)
 853 {
 854         if (wpa_auth->cb.set_key == NULL)
 855                 return -1;
 856         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 857                                     key, key_len);
 858 }
 859
 860
 861 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
 862 {
 863         enum wpa_alg alg;
 864         int klen;
 865
 866         /* MLME-SETKEYS.request(PTK) */
 867         if (sm->pairwise == WPA_CIPHER_TKIP) {
 868                 alg = WPA_ALG_TKIP;
 869                 klen = 32;
 870         } else if (sm->pairwise == WPA_CIPHER_CCMP) {
 871                 alg = WPA_ALG_CCMP;
 872                 klen = 16;
 873         } else {
 874                 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
 875                            "PTK configuration", sm->pairwise);
 876                 return;
 877         }
 878
 879         /* FIX: add STA entry to kernel/driver here? The set_key will fail
 880          * most likely without this.. At the moment, STA entry is added only
 881          * after association has been completed. This function will be called
 882          * again after association to get the PTK configured, but that could be
 883          * optimized by adding the STA entry earlier.
 884          */
 885         if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
 886                              sm->PTK.tk1, klen))
 887                 return;
 888
 889         /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
 890         sm->pairwise_set = TRUE;
 891 }
 892
 893
 894 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
 895                                    const u8 *ies, size_t ies_len,
 896                                    u8 **resp_ies, size_t *resp_ies_len)
 897 {
 898         struct rsn_mdie *mdie;
 899         struct rsn_ftie *ftie;
 900         u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
 901         u8 ptk_name[WPA_PMK_NAME_LEN];
 902         struct wpa_auth_config *conf;
 903         struct wpa_ft_ies parse;
 904         size_t buflen, ptk_len;
 905         int ret;
 906         u8 *pos, *end;
 907         int pairwise;
 908
 909         *resp_ies = NULL;
 910         *resp_ies_len = 0;
 911
 912         sm->pmk_r1_name_valid = 0;
 913         conf = &sm->wpa_auth->conf;
 914
 915         wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
 916                     ies, ies_len);
 917
 918         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
 919                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
 920                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 921         }
 922
 923         mdie = (struct rsn_mdie *) parse.mdie;
 924         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
 925             os_memcmp(mdie->mobility_domain,
 926                       sm->wpa_auth->conf.mobility_domain,
 927                       MOBILITY_DOMAIN_ID_LEN) != 0) {
 928                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
 929                 return WLAN_STATUS_INVALID_MDIE;
 930         }
 931
 932         ftie = (struct rsn_ftie *) parse.ftie;
 933         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
 934                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
 935                 return WLAN_STATUS_INVALID_FTIE;
 936         }
 937
 938         os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
 939
 940         if (parse.r0kh_id == NULL) {
 941                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
 942                 return WLAN_STATUS_INVALID_FTIE;
 943         }
 944
 945         wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
 946                     parse.r0kh_id, parse.r0kh_id_len);
 947         os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
 948         sm->r0kh_id_len = parse.r0kh_id_len;
 949
 950         if (parse.rsn_pmkid == NULL) {
 951                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
 952                 return WLAN_STATUS_INVALID_PMKID;
 953         }
 954
 955         wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
 956                     parse.rsn_pmkid, WPA_PMK_NAME_LEN);
 957         wpa_derive_pmk_r1_name(parse.rsn_pmkid,
 958                                sm->wpa_auth->conf.r1_key_holder, sm->addr,
 959                                pmk_r1_name);
 960         wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
 961                     pmk_r1_name, WPA_PMK_NAME_LEN);
 962
 963         if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
 964                     &pairwise) < 0) {
 965                 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
 966                                        sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
 967                         wpa_printf(MSG_DEBUG, "FT: Did not have matching "
 968                                    "PMK-R1 and unknown R0KH-ID");
 969                         return WLAN_STATUS_INVALID_PMKID;
 970                 }
 971
 972                 /*
 973                  * TODO: Should return "status pending" (and the caller should
 974                  * not send out response now). The real response will be sent
 975                  * once the response from R0KH is received.
 976                  */
 977                 return WLAN_STATUS_INVALID_PMKID;
 978         }
 979
 980         wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
 981         sm->pmk_r1_name_valid = 1;
 982         os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
 983
 984         if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
 985                 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
 986                            "ANonce");
 987                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 988         }
 989
 990         wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
 991                     sm->SNonce, WPA_NONCE_LEN);
 992         wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
 993                     sm->ANonce, WPA_NONCE_LEN);
 994
 995         ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
 996         wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
 997                           sm->wpa_auth->addr, pmk_r1_name,
 998                           (u8 *) &sm->PTK, ptk_len, ptk_name);
 999         wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
1000                         (u8 *) &sm->PTK, ptk_len);
1001         wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1002
1003         sm->pairwise = pairwise;
1004         wpa_ft_install_ptk(sm);
1005
1006         buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
1007                 2 + FT_R1KH_ID_LEN + 200;
1008         *resp_ies = os_zalloc(buflen);
1009         if (*resp_ies == NULL) {
1010                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1011         }
1012
1013         pos = *resp_ies;
1014         end = *resp_ies + buflen;
1015
1016         ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1017         if (ret < 0) {
1018                 os_free(*resp_ies);
1019                 *resp_ies = NULL;
1020                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1021         }
1022         pos += ret;
1023
1024         ret = wpa_write_mdie(conf, pos, end - pos);
1025         if (ret < 0) {
1026                 os_free(*resp_ies);
1027                 *resp_ies = NULL;
1028                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1029         }
1030         pos += ret;
1031
1032         ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1033                              sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1034         if (ret < 0) {
1035                 os_free(*resp_ies);
1036                 *resp_ies = NULL;
1037                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1038         }
1039         pos += ret;
1040
1041         *resp_ies_len = pos - *resp_ies;
1042
1043         return WLAN_STATUS_SUCCESS;
1044 }
1045
1046
1047 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1048                          u16 auth_transaction, const u8 *ies, size_t ies_len,
1049                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1050                                     u16 auth_transaction, u16 status,
1051                                     const u8 *ies, size_t ies_len),
1052                          void *ctx)
1053 {
1054         u16 status;
1055         u8 *resp_ies;
1056         size_t resp_ies_len;
1057
1058         if (sm == NULL) {
1059                 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1060                            "WPA SM not available");
1061                 return;
1062         }
1063
1064         wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1065                    " BSSID=" MACSTR " transaction=%d",
1066                    MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1067         status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1068                                          &resp_ies_len);
1069
1070         wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1071                    " auth_transaction=%d status=%d",
1072                    MAC2STR(sm->addr), auth_transaction + 1, status);
1073         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1074         cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1075            resp_ies, resp_ies_len);
1076         os_free(resp_ies);
1077 }
1078
1079
1080 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1081                             size_t ies_len)
1082 {
1083         struct wpa_ft_ies parse;
1084         struct rsn_mdie *mdie;
1085         struct rsn_ftie *ftie;
1086         u8 mic[16];
1087
1088         if (sm == NULL)
1089                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1090
1091         wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1092
1093         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1094                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1095                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1096         }
1097
1098         if (parse.rsn == NULL) {
1099                 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1100                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1101         }
1102
1103         if (parse.rsn_pmkid == NULL) {
1104                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1105                 return WLAN_STATUS_INVALID_PMKID;
1106         }
1107
1108         if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1109         {
1110                 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1111                            "with the PMKR1Name derived from auth request");
1112                 return WLAN_STATUS_INVALID_PMKID;
1113         }
1114
1115         mdie = (struct rsn_mdie *) parse.mdie;
1116         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1117             os_memcmp(mdie->mobility_domain,
1118                       sm->wpa_auth->conf.mobility_domain,
1119                       MOBILITY_DOMAIN_ID_LEN) != 0) {
1120                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1121                 return WLAN_STATUS_INVALID_MDIE;
1122         }
1123
1124         ftie = (struct rsn_ftie *) parse.ftie;
1125         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1126                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1127                 return WLAN_STATUS_INVALID_FTIE;
1128         }
1129
1130         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1131                        parse.mdie - 2, parse.mdie_len + 2,
1132                        parse.ftie - 2, parse.ftie_len + 2,
1133                        parse.rsn - 2, parse.rsn_len + 2,
1134                        parse.ric, parse.ric_len,
1135                        mic) < 0) {
1136                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1137                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1138         }
1139
1140         if (os_memcmp(mic, ftie->mic, 16) != 0) {
1141                 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1142                 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1143                 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1144                 return WLAN_STATUS_INVALID_FTIE;
1145         }
1146
1147         return WLAN_STATUS_SUCCESS;
1148 }
1149
1150
1151 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1152 {
1153         const u8 *sta_addr, *target_ap;
1154         const u8 *ies;
1155         size_t ies_len;
1156         u8 action;
1157         struct ft_rrb_frame *frame;
1158
1159         if (sm == NULL)
1160                 return -1;
1161
1162         /*
1163          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1164          * FT Request action frame body[variable]
1165          */
1166
1167         if (len < 14) {
1168                 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1169                            "(len=%lu)", (unsigned long) len);
1170                 return -1;
1171         }
1172
1173         action = data[1];
1174         sta_addr = data + 2;
1175         target_ap = data + 8;
1176         ies = data + 14;
1177         ies_len = len - 14;
1178
1179         wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1180                    " Target AP=" MACSTR " Action=%d)",
1181                    MAC2STR(sta_addr), MAC2STR(target_ap), action);
1182
1183         if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1184                 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1185                            "STA=" MACSTR " STA-Address=" MACSTR,
1186                            MAC2STR(sm->addr), MAC2STR(sta_addr));
1187                 return -1;
1188         }
1189
1190         /*
1191          * Do some sanity checking on the target AP address (not own and not
1192          * broadcast. This could be extended to filter based on a list of known
1193          * APs in the MD (if such a list were configured).
1194          */
1195         if ((target_ap[0] & 0x01) ||
1196             os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1197                 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1198                            "frame");
1199                 return -1;
1200         }
1201
1202         wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1203
1204         /* RRB - Forward action frame to the target AP */
1205         frame = os_malloc(sizeof(*frame) + len);
1206         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1207         frame->packet_type = FT_PACKET_REQUEST;
1208         frame->action_length = host_to_le16(len);
1209         os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1210         os_memcpy(frame + 1, data, len);
1211
1212         wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1213                         sizeof(*frame) + len);
1214         os_free(frame);
1215
1216         return 0;
1217 }
1218
1219
1220 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1221                                  const u8 *current_ap, const u8 *sta_addr,
1222                                  const u8 *body, size_t len)
1223 {
1224         struct wpa_state_machine *sm;
1225         u16 status;
1226         u8 *resp_ies, *pos;
1227         size_t resp_ies_len, rlen;
1228         struct ft_rrb_frame *frame;
1229
1230         sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1231         if (sm == NULL) {
1232                 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1233                            "RRB Request");
1234                 return -1;
1235         }
1236
1237         wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1238
1239         status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1240                                          &resp_ies_len);
1241
1242         wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1243                    " CurrentAP=" MACSTR " status=%d",
1244                    MAC2STR(sm->addr), MAC2STR(current_ap), status);
1245         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1246
1247         /* RRB - Forward action frame response to the Current AP */
1248
1249         /*
1250          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1251          * Status_Code[2] FT Request action frame body[variable]
1252          */
1253         rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1254
1255         frame = os_malloc(sizeof(*frame) + rlen);
1256         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1257         frame->packet_type = FT_PACKET_RESPONSE;
1258         frame->action_length = host_to_le16(rlen);
1259         os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1260         pos = (u8 *) (frame + 1);
1261         *pos++ = WLAN_ACTION_FT;
1262         *pos++ = 2; /* Action: Response */
1263         os_memcpy(pos, sta_addr, ETH_ALEN);
1264         pos += ETH_ALEN;
1265         os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1266         pos += ETH_ALEN;
1267         WPA_PUT_LE16(pos, status);
1268         pos += 2;
1269         if (resp_ies) {
1270                 os_memcpy(pos, resp_ies, resp_ies_len);
1271                 os_free(resp_ies);
1272         }
1273
1274         wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1275                         sizeof(*frame) + rlen);
1276         os_free(frame);
1277
1278         return 0;
1279 }
1280
1281
1282 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1283                               const u8 *src_addr,
1284                               const u8 *data, size_t data_len)
1285 {
1286         struct ft_r0kh_r1kh_pull_frame *frame, f;
1287         struct ft_remote_r1kh *r1kh;
1288         struct ft_r0kh_r1kh_resp_frame resp, r;
1289         u8 pmk_r0[PMK_LEN];
1290         int pairwise;
1291
1292         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1293
1294         if (data_len < sizeof(*frame))
1295                 return -1;
1296
1297         r1kh = wpa_auth->conf.r1kh_list;
1298         while (r1kh) {
1299                 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1300                         break;
1301                 r1kh = r1kh->next;
1302         }
1303         if (r1kh == NULL) {
1304                 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1305                            "PMK-R1 pull source address " MACSTR,
1306                            MAC2STR(src_addr));
1307                 return -1;
1308         }
1309
1310         frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1311         /* aes_unwrap() does not support inplace decryption, so use a temporary
1312          * buffer for the data. */
1313         if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1314                        frame->nonce, f.nonce) < 0) {
1315                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1316                            "request from " MACSTR, MAC2STR(src_addr));
1317                 return -1;
1318         }
1319
1320         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1321                     f.nonce, sizeof(f.nonce));
1322         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1323                     f.pmk_r0_name, WPA_PMK_NAME_LEN);
1324         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1325                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1326
1327         os_memset(&resp, 0, sizeof(resp));
1328         resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1329         resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1330         resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1331         os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1332
1333         /* aes_wrap() does not support inplace encryption, so use a temporary
1334          * buffer for the data. */
1335         os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1336         os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1337         os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1338         if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1339                                 &pairwise) < 0) {
1340                 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1341                            "PMK-R1 pull");
1342                 return -1;
1343         }
1344
1345         wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1346                           r.pmk_r1, r.pmk_r1_name);
1347         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1348         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1349                     WPA_PMK_NAME_LEN);
1350         r.pairwise = pairwise;
1351
1352         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1353                      r.nonce, resp.nonce) < 0) {
1354                 os_memset(pmk_r0, 0, PMK_LEN);
1355                 return -1;
1356         }
1357
1358         os_memset(pmk_r0, 0, PMK_LEN);
1359
1360         wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1361
1362         return 0;
1363 }
1364
1365
1366 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1367                               const u8 *src_addr,
1368                               const u8 *data, size_t data_len)
1369 {
1370         struct ft_r0kh_r1kh_resp_frame *frame, f;
1371         struct ft_remote_r0kh *r0kh;
1372         int pairwise;
1373
1374         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1375
1376         if (data_len < sizeof(*frame))
1377                 return -1;
1378
1379         r0kh = wpa_auth->conf.r0kh_list;
1380         while (r0kh) {
1381                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1382                         break;
1383                 r0kh = r0kh->next;
1384         }
1385         if (r0kh == NULL) {
1386                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1387                            "PMK-R0 pull response source address " MACSTR,
1388                            MAC2STR(src_addr));
1389                 return -1;
1390         }
1391
1392         frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1393         /* aes_unwrap() does not support inplace decryption, so use a temporary
1394          * buffer for the data. */
1395         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1396                        frame->nonce, f.nonce) < 0) {
1397                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1398                            "response from " MACSTR, MAC2STR(src_addr));
1399                 return -1;
1400         }
1401
1402         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1403             != 0) {
1404                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1405                            "matching R1KH-ID");
1406                 return -1;
1407         }
1408
1409         /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1410          * and call this requests callback function to finish request
1411          * processing */
1412
1413         pairwise = le_to_host16(f.pairwise);
1414         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1415                     f.nonce, sizeof(f.nonce));
1416         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1417                    MACSTR " pairwise=0x%x",
1418                    MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1419         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1420                         f.pmk_r1, PMK_LEN);
1421         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1422                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1423
1424         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1425                             pairwise);
1426         os_memset(f.pmk_r1, 0, PMK_LEN);
1427
1428         return 0;
1429 }
1430
1431
1432 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1433                               const u8 *src_addr,
1434                               const u8 *data, size_t data_len)
1435 {
1436         struct ft_r0kh_r1kh_push_frame *frame, f;
1437         struct ft_remote_r0kh *r0kh;
1438         struct os_time now;
1439         os_time_t tsend;
1440         int pairwise;
1441
1442         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1443
1444         if (data_len < sizeof(*frame))
1445                 return -1;
1446
1447         r0kh = wpa_auth->conf.r0kh_list;
1448         while (r0kh) {
1449                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1450                         break;
1451                 r0kh = r0kh->next;
1452         }
1453         if (r0kh == NULL) {
1454                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1455                            "PMK-R0 push source address " MACSTR,
1456                            MAC2STR(src_addr));
1457                 return -1;
1458         }
1459
1460         frame = (struct ft_r0kh_r1kh_push_frame *) data;
1461         /* aes_unwrap() does not support inplace decryption, so use a temporary
1462          * buffer for the data. */
1463         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1464                        frame->timestamp, f.timestamp) < 0) {
1465                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1466                            MACSTR, MAC2STR(src_addr));
1467                 return -1;
1468         }
1469
1470         os_get_time(&now);
1471         tsend = WPA_GET_LE32(f.timestamp);
1472         if ((now.sec > tsend && now.sec - tsend > 60) ||
1473             (now.sec < tsend && tsend - now.sec > 60)) {
1474                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1475                            "timestamp: sender time %d own time %d\n",
1476                            (int) tsend, (int) now.sec);
1477                 return -1;
1478         }
1479
1480         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1481             != 0) {
1482                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1483                            "R1KH-ID (received " MACSTR " own " MACSTR ")",
1484                            MAC2STR(f.r1kh_id),
1485                            MAC2STR(wpa_auth->conf.r1_key_holder));
1486                 return -1;
1487         }
1488
1489         pairwise = le_to_host16(f.pairwise);
1490         wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1491                    MACSTR " pairwise=0x%x",
1492                    MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1493         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1494                         f.pmk_r1, PMK_LEN);
1495         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1496                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1497
1498         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1499                             pairwise);
1500         os_memset(f.pmk_r1, 0, PMK_LEN);
1501
1502         return 0;
1503 }
1504
1505
1506 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1507                   const u8 *data, size_t data_len)
1508 {
1509         struct ft_rrb_frame *frame;
1510         u16 alen;
1511         const u8 *pos, *end, *start;
1512         u8 action;
1513         const u8 *sta_addr, *target_ap_addr;
1514
1515         wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1516                    MAC2STR(src_addr));
1517
1518         if (data_len < sizeof(*frame)) {
1519                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1520                            (unsigned long) data_len);
1521                 return -1;
1522         }
1523
1524         pos = data;
1525         frame = (struct ft_rrb_frame *) pos;
1526         pos += sizeof(*frame);
1527
1528         alen = le_to_host16(frame->action_length);
1529         wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1530                    "action_length=%d ap_address=" MACSTR,
1531                    frame->frame_type, frame->packet_type, alen,
1532                    MAC2STR(frame->ap_address));
1533
1534         if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1535                 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1536                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1537                            "unrecognized type %d", frame->frame_type);
1538                 return -1;
1539         }
1540
1541         if (alen > data_len - sizeof(*frame)) {
1542                 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1543                            "frame");
1544                 return -1;
1545         }
1546
1547         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1548                 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1549         if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1550                 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1551         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1552                 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1553
1554         wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1555
1556         if (alen < 1 + 1 + 2 * ETH_ALEN) {
1557                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1558                            "room for Action Frame body); alen=%lu",
1559                            (unsigned long) alen);
1560                 return -1;
1561         }
1562         start = pos;
1563         end = pos + alen;
1564
1565         if (*pos != WLAN_ACTION_FT) {
1566                 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1567                            "%d", *pos);
1568                 return -1;
1569         }
1570
1571         pos++;
1572         action = *pos++;
1573         sta_addr = pos;
1574         pos += ETH_ALEN;
1575         target_ap_addr = pos;
1576         pos += ETH_ALEN;
1577         wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1578                    MACSTR " target_ap_addr=" MACSTR,
1579                    action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1580
1581         if (frame->packet_type == FT_PACKET_REQUEST) {
1582                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1583
1584                 if (action != 1) {
1585                         wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1586                                    "RRB Request", action);
1587                         return -1;
1588                 }
1589
1590                 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1591                         wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1592                                    "RRB Request does not match with own "
1593                                    "address");
1594                         return -1;
1595                 }
1596
1597                 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1598                                           sta_addr, pos, end - pos) < 0)
1599                         return -1;
1600         } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1601                 u16 status_code;
1602
1603                 if (end - pos < 2) {
1604                         wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1605                                    "code in RRB Response");
1606                         return -1;
1607                 }
1608                 status_code = WPA_GET_LE16(pos);
1609                 pos += 2;
1610
1611                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1612                            "(status_code=%d)", status_code);
1613
1614                 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1615                         return -1;
1616         } else {
1617                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1618                            "packet_type %d", frame->packet_type);
1619                 return -1;
1620         }
1621
1622         return 0;
1623 }
1624
1625
1626 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1627                                    struct wpa_ft_pmk_r0_sa *pmk_r0,
1628                                    struct ft_remote_r1kh *r1kh,
1629                                    const u8 *s1kh_id, int pairwise)
1630 {
1631         struct ft_r0kh_r1kh_push_frame frame, f;
1632         struct os_time now;
1633
1634         os_memset(&frame, 0, sizeof(frame));
1635         frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1636         frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1637         frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1638         os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1639
1640         /* aes_wrap() does not support inplace encryption, so use a temporary
1641          * buffer for the data. */
1642         os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1643         os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1644         os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1645         wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1646                           s1kh_id, f.pmk_r1, f.pmk_r1_name);
1647         wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1648         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1649         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1650                     WPA_PMK_NAME_LEN);
1651         os_get_time(&now);
1652         WPA_PUT_LE32(f.timestamp, now.sec);
1653         f.pairwise = pairwise;
1654         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1655                      f.timestamp, frame.timestamp) < 0)
1656                 return;
1657
1658         wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1659 }
1660
1661
1662 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1663 {
1664         struct wpa_ft_pmk_r0_sa *r0;
1665         struct ft_remote_r1kh *r1kh;
1666
1667         if (!wpa_auth->conf.pmk_r1_push)
1668                 return;
1669
1670         r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1671         while (r0) {
1672                 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1673                         break;
1674                 r0 = r0->next;
1675         }
1676
1677         if (r0 == NULL || r0->pmk_r1_pushed)
1678                 return;
1679         r0->pmk_r1_pushed = 1;
1680
1681         wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1682                    "for STA " MACSTR, MAC2STR(addr));
1683
1684         r1kh = wpa_auth->conf.r1kh_list;
1685         while (r1kh) {
1686                 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1687                 r1kh = r1kh->next;
1688         }
1689 }
1690
1691 #endif /* CONFIG_IEEE80211R */